RME MADIFX mainline inclusion

RME MADIFX mainline inclusion

[Adrian Knoth]

Hi Takashi!

Back in the days (late 2012 I guess), I wrote the MADIFX driver based on
the existing RME hdspm.c.

I never had physical access to this 1399 Euro audio interface, only the
OSX driver and a shell login to one of IOSONO's machines which
temporarily featured such a card.

I know there are other users like University of Washington (DXARTS) and
probably some more (the usual WFS suspects).

Long story short: I don't have such a card and since I no longer work in
Linux audio, I guess I won't have access in the foreseeable future.

That said, I think the driver should be part of the mainline kernel, so
it gets all the love the other drivers get (static code analysis, API
changes etc.)

I think I've ported everything you guys have done to hdspm: I've read
the commitlog for hdspm and applied those changes to the madifx driver.

Code is here:

    https://github.com/adiknoth/madifx/commits/tokernel


Status:

  * PCM playback/capture working (SS and DS tested, QS untested)
  * MIDI working
  * All card settings working (e.g. TX64, SMUX, AESpro, WC-Term, 
WC-singlespeed...)
  * Slave Mode/External clock selection working
  * Mirror-MADI1-to-Out2+3 maybe working (untested)
  * Redundancy mode maybe working (untested)
  * ioctls implemented (see ioctl.c)
  * Static mixer working (fixed 1:1 mapping)
  * DSP NOT working. RME doesn't intend to release any information 
regarding the DSP.
  * Adjustable mixer NOT working (needs new userspace tools)
  * Levelmetering NOT working (maybe wrong, needs new userspace tools)


I have no idea who could write the new mixer code. Apparently, demand is
low, maybe zero.

checkpatch reports four warnings of which one is a false-positive, the
other one doesn't make sense and only two are real but somewhat ugly to
fix (line over 80 with really long array indices).

In its current state, can I send you three patches (Kconfig, madifx.h,
madifx.c) that add said driver to sound/pci/rme9652?


Cheers

Re: RME MADIFX mainline inclusion

[Takashi Iwai]

At Mon, 06 Apr 2015 18:24:43 +0200,
Adrian Knoth wrote:
> 
> Hi Takashi!
> 
> Back in the days (late 2012 I guess), I wrote the MADIFX driver based on
> the existing RME hdspm.c.
> 
> I never had physical access to this 1399 Euro audio interface, only the
> OSX driver and a shell login to one of IOSONO's machines which
> temporarily featured such a card.
> 
> I know there are other users like University of Washington (DXARTS) and
> probably some more (the usual WFS suspects).
> 
> Long story short: I don't have such a card and since I no longer work in
> Linux audio, I guess I won't have access in the foreseeable future.
> 
> That said, I think the driver should be part of the mainline kernel, so
> it gets all the love the other drivers get (static code analysis, API
> changes etc.)
> 
> I think I've ported everything you guys have done to hdspm: I've read
> the commitlog for hdspm and applied those changes to the madifx driver.
> 
> Code is here:
> 
>     https://github.com/adiknoth/madifx/commits/tokernel
> 
> 
> Status:
> 
>   * PCM playback/capture working (SS and DS tested, QS untested)
>   * MIDI working
>   * All card settings working (e.g. TX64, SMUX, AESpro, WC-Term, 
> WC-singlespeed...)
>   * Slave Mode/External clock selection working
>   * Mirror-MADI1-to-Out2+3 maybe working (untested)
>   * Redundancy mode maybe working (untested)
>   * ioctls implemented (see ioctl.c)
>   * Static mixer working (fixed 1:1 mapping)
>   * DSP NOT working. RME doesn't intend to release any information 
> regarding the DSP.
>   * Adjustable mixer NOT working (needs new userspace tools)
>   * Levelmetering NOT working (maybe wrong, needs new userspace tools)
> 
> 
> I have no idea who could write the new mixer code. Apparently, demand is
> low, maybe zero.
> 
> checkpatch reports four warnings of which one is a false-positive, the
> other one doesn't make sense and only two are real but somewhat ugly to
> fix (line over 80 with really long array indices).
> 
> In its current state, can I send you three patches (Kconfig, madifx.h,
> madifx.c) that add said driver to sound/pci/rme9652?

Well, I really want some testers whether the merged code actually
works.  The code looks fine through a quick glance, so the only
requirement is the test (and the demands, of course).  If we can get
someone, then I'll happily merge the code after review.

Could you contact some people for testing?


thanks,

Takashi

Re: RME MADIFX mainline inclusion

[humbert.olivier.1]

Takashi Iwai wrote :

> Well, I really want some testers whether the merged code actually
> works.  The code looks fine through a quick glance, so the only
> requirement is the test (and the demands, of course).  If we can get
> someone, then I'll happily merge the code after review.
> 
> Could you contact some people for testing?

FYI, a call has been sent here : http://www.linuxmao.org/forumthread60977 (french)

Regards,
Olivier

Re: RME MADIFX mainline inclusion

[Adrian Knoth]

On 04/07/15 12:03, Takashi Iwai wrote:

>> Code is here:
>>
>>      https://github.com/adiknoth/madifx/commits/tokernel
>>
[..]
>> In its current state, can I send you three patches (Kconfig, madifx.h,
>> madifx.c) that add said driver to sound/pci/rme9652?
> Well, I really want some testers whether the merged code actually
> works.

The standalone code (above driver) works, I know a couple of people
using it.

Let me CC a few I've found - maybe they can test a merged version or at
least testify that what they're using atm actually works.

I'd then just go ahead and create a patchset, so they can patch it in
and test it locally.


Cheers

Re: RME MADIFX mainline inclusion

[IOhannes m zmoelnig]

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On 2015-04-07 13:05, Adrian Knoth wrote:
> Let me CC a few I've found - maybe they can test a merged version or at
> least testify that what they're using atm actually works.
> 

i can confirm that i'm  successfully using the madifx driver on (at
least) one of our systems here at uni.
however, we are still using an older revision (
ab51234f3e49def959f01bc3b9dedf1a021fcd88 from adrian's github
repository) - mainly because there hasn't been a need to upgrade to a
newer version, as everything used to work :-)
i will try to test the new code in the next few days.


fgasdmr
IOhannes


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Re: RME MADIFX mainline inclusion

[Takashi Iwai]

At Tue, 07 Apr 2015 13:28:07 +0200,
IOhannes m zmoelnig wrote:
> 
> On 2015-04-07 13:05, Adrian Knoth wrote:
> > Let me CC a few I've found - maybe they can test a merged version or at
> > least testify that what they're using atm actually works.
> > 
> 
> i can confirm that i'm  successfully using the madifx driver on (at
> least) one of our systems here at uni.
> however, we are still using an older revision (
> ab51234f3e49def959f01bc3b9dedf1a021fcd88 from adrian's github
> repository) - mainly because there hasn't been a need to upgrade to a
> newer version, as everything used to work :-)
> i will try to test the new code in the next few days.

OK, good to hear.  I'd need, though, testing of the new kernel after
merging Adrian's patches.  Can you manage it?  If yes, it's a step
forward.


thanks,

Takashi

Re: RME MADIFX mainline inclusion

[Heikki Lindholm]

7.4.2015 14.05, Adrian Knoth kirjoitti:
> On 04/07/15 12:03, Takashi Iwai wrote:
>
>>> Code is here:
>>>
>>> https://github.com/adiknoth/madifx/commits/tokernel
>>>
> [..]
>>> In its current state, can I send you three patches (Kconfig, madifx.h,
>>> madifx.c) that add said driver to sound/pci/rme9652?
>> Well, I really want some testers whether the merged code actually
>> works.
>
> The standalone code (above driver) works, I know a couple of people
> using it.
>
> Let me CC a few I've found - maybe they can test a merged version or at
> least testify that what they're using atm actually works.

We have been using the madifx driver since mid-2013 in production 
environment and it has served well. Up to now our system has been 
running with a driver snapshot from July 2013 on ubuntustudio 13.04 
(kernel 3.8 iirc). We just upgraded to ubuntustudio 14.04 and madifx 
driver from Adrian's tokernel branch (ubuntu vidid kernel 3.19.0). So 
far, it appears to work just as well.

So, +1 for mainlining the driver. We can also test the actual patchset, 
when submitted.

Regards,
Heikki Lindholm

Re: RME MADIFX mainline inclusion

[Markus Seeber]

On 04/07/2015 01:05 PM, Adrian Knoth wrote:
> On 04/07/15 12:03, Takashi Iwai wrote:
> 
>>> Code is here:
>>>
>>>      https://github.com/adiknoth/madifx/commits/tokernel
>>>
> [..]
>>> In its current state, can I send you three patches (Kconfig, madifx.h,
>>> madifx.c) that add said driver to sound/pci/rme9652?
>> Well, I really want some testers whether the merged code actually
>> works.
> 
> The standalone code (above driver) works, I know a couple of people
> using it.
> 
> Let me CC a few I've found - maybe they can test a merged version or at
> least testify that what they're using atm actually works.
> 
> I'd then just go ahead and create a patchset, so they can patch it in
> and test it locally.
> 
> 
> Cheers
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 

I am ready to test patches, when you send them.

Cheers

[PATCH 0/4] Driver for RME MADI FX

[Adrian Knoth]

From: Adrian Knoth <aknoth@google.com>

Hi!

As discussed before, here's the current driver for the RME MADI FX for
mainline inclusion. So far, only the PCIe version is supported, not the
USB3.0 counterpart.

Adrian Knoth (4):
  ALSA: madifx - Makefile entries for RME MADI FX
  ALSA: Add RME MADI FX Kconfig entries
  ALSA: madifx - Expose preliminary userspace interface
  ALSA: madifx - Add support for RME MADI FX

 include/uapi/sound/madifx.h |  165 ++
 sound/pci/Kconfig           |   21 +
 sound/pci/rme9652/Makefile  |    2 +
 sound/pci/rme9652/madifx.c  | 3659 +++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 3847 insertions(+)
 create mode 100644 include/uapi/sound/madifx.h
 create mode 100644 sound/pci/rme9652/madifx.c

-- 
2.1.0

[PATCH 1/4] ALSA: madifx - Makefile entries for RME MADI FX

[Adrian Knoth]

Add Makefile entries for RME MADI FX cards.

Signed-off-by: Adrian Knoth <aknoth@google.com>

diff --git a/sound/pci/rme9652/Makefile b/sound/pci/rme9652/Makefile
index dcba560..e483dce 100644
--- a/sound/pci/rme9652/Makefile
+++ b/sound/pci/rme9652/Makefile
@@ -6,8 +6,10 @@
 snd-rme9652-objs := rme9652.o
 snd-hdsp-objs := hdsp.o
 snd-hdspm-objs := hdspm.o
+snd-madifx-objs := madifx.o
 
 # Toplevel Module Dependency
 obj-$(CONFIG_SND_RME9652) += snd-rme9652.o
 obj-$(CONFIG_SND_HDSP) += snd-hdsp.o
 obj-$(CONFIG_SND_HDSPM) +=snd-hdspm.o
+obj-$(CONFIG_SND_MADIFX) +=snd-madifx.o
-- 
2.1.0

Re: [PATCH 1/4] ALSA: madifx - Makefile entries for RME MADI FX

[Takashi Iwai]

On Sat, 08 Aug 2015 18:23:34 +0200,
Adrian Knoth wrote:
> 
> Add Makefile entries for RME MADI FX cards.
> 
> Signed-off-by: Adrian Knoth <aknoth@google.com>

Please put this one at the last.  In this way, the bisectionability is
kept.


Takashi

> 
> diff --git a/sound/pci/rme9652/Makefile b/sound/pci/rme9652/Makefile
> index dcba560..e483dce 100644
> --- a/sound/pci/rme9652/Makefile
> +++ b/sound/pci/rme9652/Makefile
> @@ -6,8 +6,10 @@
>  snd-rme9652-objs := rme9652.o
>  snd-hdsp-objs := hdsp.o
>  snd-hdspm-objs := hdspm.o
> +snd-madifx-objs := madifx.o
>  
>  # Toplevel Module Dependency
>  obj-$(CONFIG_SND_RME9652) += snd-rme9652.o
>  obj-$(CONFIG_SND_HDSP) += snd-hdsp.o
>  obj-$(CONFIG_SND_HDSPM) +=snd-hdspm.o
> +obj-$(CONFIG_SND_MADIFX) +=snd-madifx.o
> -- 
> 2.1.0
> 

[PATCH 2/4] ALSA: Add RME MADI FX Kconfig entries

[Adrian Knoth]

Signed-off-by: Adrian Knoth <aknoth@google.com>

diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
index edfc1b8..9b62479 100644
--- a/sound/pci/Kconfig
+++ b/sound/pci/Kconfig
@@ -607,6 +607,27 @@ config SND_HDSPM
 	  To compile this driver as a module, choose M here: the module
 	  will be called snd-hdspm.
 
+config SND_MADIFX
+	tristate "RME Hammerfall DSP MADI FX"
+	select SND_HWDEP
+	select SND_RAWMIDI
+	select SND_PCM
+	help
+	  Say Y here to include support for RME Hammerfall DSP MADI FX
+	  soundcards.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-madifx.
+
+if SND_MADIFX
+config SND_MADIFX_BROKEN
+	bool "Include broken WIP code"
+	help
+	  This option is intended for developers, most people should say N
+	  here. It enables work-in-progress code that's not yet usable from
+	  userspace.
+endif # SND_MADIFX_BROKEN
+
 config SND_ICE1712
 	tristate "ICEnsemble ICE1712 (Envy24)"
 	select SND_MPU401_UART
-- 
2.1.0

Re: [PATCH 2/4] ALSA: Add RME MADI FX Kconfig entries

[Takashi Iwai]

On Sat, 08 Aug 2015 18:23:35 +0200,
Adrian Knoth wrote:
> 
> Signed-off-by: Adrian Knoth <aknoth@google.com>

This should be the one before the last patch in the series.

> diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
> index edfc1b8..9b62479 100644
> --- a/sound/pci/Kconfig
> +++ b/sound/pci/Kconfig
> @@ -607,6 +607,27 @@ config SND_HDSPM
>  	  To compile this driver as a module, choose M here: the module
>  	  will be called snd-hdspm.
>  
> +config SND_MADIFX
> +	tristate "RME Hammerfall DSP MADI FX"
> +	select SND_HWDEP
> +	select SND_RAWMIDI
> +	select SND_PCM
> +	help
> +	  Say Y here to include support for RME Hammerfall DSP MADI FX
> +	  soundcards.
> +
> +	  To compile this driver as a module, choose M here: the module
> +	  will be called snd-madifx.
> +
> +if SND_MADIFX
> +config SND_MADIFX_BROKEN
> +	bool "Include broken WIP code"
> +	help
> +	  This option is intended for developers, most people should say N
> +	  here. It enables work-in-progress code that's not yet usable from
> +	  userspace.
> +endif # SND_MADIFX_BROKEN

Just use depends on in stead of if.

And is this broken or not usable?  In the latter case, using a word
"BROKEN" is rather confusing because it means that the kernel part is
ready.  OTOH, if it's really a broken code, including it in the
upstream tree should be avoided.


thanks,

Takashi

[PATCH 3/4] ALSA: madifx - Expose preliminary userspace interface

[Adrian Knoth]

Despite its name "HDSPe", the MADI FX is a new card with a similar but
different design requiring new userspace tools.

These tools don't exist, yet, but to facilitate their development,
expose a preliminary userspace API. Note that the stable bits are always
enabled while the volatile parts require CONFIG_SND_MADIFX_BROKEN to be
set.

Signed-off-by: Adrian Knoth <aknoth@google.com>

diff --git a/include/uapi/sound/madifx.h b/include/uapi/sound/madifx.h
new file mode 100644
index 0000000..6aea609
--- /dev/null
+++ b/include/uapi/sound/madifx.h
@@ -0,0 +1,165 @@
+#ifndef __SOUND_MADIFX_H
+#define __SOUND_MADIFX_H
+/*
+ *   Copyright (C) 2012 Adrian Knoth
+ *   based on hdspm.h from Winfried Ritsch (IEM)
+ *   based on hdsp.h from Thomas Charbonnel (thomas@undata.org)
+ *
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ */
+enum madifx_io_type {
+	MADIFX
+};
+
+enum madifx_speed {
+	ss = 0,
+	ds = 1,
+	qs = 2
+};
+
+/* -------------------- IOCTL Peak/RMS Meters -------------------- */
+
+#ifdef CONFIG_SND_MADIFX_BROKEN
+struct madifx_level_buffer {
+	uint32_t rms_out_pre[2 * 256];
+	uint32_t peak_out_pre[256];
+
+	uint32_t rms_in[2 * 256];
+	uint32_t peak_in[256];
+
+	uint32_t rms_play[2 * 256];
+	uint32_t peak_play[256];
+
+	uint32_t rms_out[2 * 256];
+	uint32_t peak_out[256];
+
+	uint32_t rms_in_pre[2 * 256];
+	uint32_t peak_in_pre[256];
+
+	uint8_t speed; /* enum {ss, ds, qs} */
+};
+
+#define SNDRV_MADIFX_IOCTL_GET_LEVEL \
+	_IOR('H', 0x42, struct madifx_level_buffer)
+
+#endif /* CONFIG_SND_MADIFX_BROKEN */
+
+/* ------------ CONFIG block IOCTL ---------------------- */
+
+struct madifx_config {
+	uint8_t madi_tx_64[3];
+	uint8_t madi_smux[3];
+	uint8_t wcterm;
+	uint8_t wck48;
+	uint8_t aespro;
+	uint8_t redundancy_mode;
+	uint8_t mirror_madi_out;
+};
+
+#define SNDRV_MADIFX_IOCTL_GET_CONFIG \
+	_IOR('H', 0x41, struct madifx_config)
+
+
+/**
+ * The status data reflects the device's current state
+ * as determined by the card's configuration and
+ * connection status.
+ **/
+
+enum madifx_sync {
+	madifx_sync_no_lock = 0,
+	madifx_sync_lock = 1,
+	madifx_sync_sync = 2
+};
+
+enum madifx_madi_channel_format {
+	madifx_format_ch_64 = 0,
+	madifx_format_ch_56 = 1,
+	madifx_format_ch_32 = 2,
+	madifx_format_ch_28 = 3,
+	madifx_format_ch_16 = 4,
+	madifx_format_ch_14 = 5,
+	madifx_format_ch_nolock = 6
+};
+
+enum madifx_madi_frame_format {
+	madifx_frame_48 = 0,
+	madifx_frame_96 = 1
+};
+
+enum madifx_syncsource {
+	syncsource_madi1 = 0,
+	syncsource_madi2 = 1,
+	syncsource_madi3 = 2,
+	syncsource_aes = 3,
+	syncsource_wc = 4,
+	syncsource_syncin = 5,
+	syncsource_none = 6
+};
+
+enum madifx_clocksource {
+	clock_internal = 0,
+	clock_aes = 1,
+	clock_wc = 2,
+	clock_madi1 = 3,
+	clock_madi2 = 4,
+	clock_madi3 = 5,
+	clock_syncin = 6
+};
+
+
+struct madifx_status {
+	/* enum madifx_io_type */
+	uint8_t card_type;
+	/* enum madi_clocksource */
+	uint8_t clock_selection;
+	uint32_t system_sample_rate;
+	/* enum madifx_madi_channel_format */
+	uint8_t madi_channelcount[3];
+	/* enum madifx_syncsource */
+	uint32_t external_sample_rates[6];
+	/* enum madifx_sync, idx: enum madifx_syncsource */
+	uint8_t sync_check[6];
+};
+
+#define SNDRV_MADIFX_IOCTL_GET_STATUS \
+	_IOR('H', 0x47, struct madifx_status)
+
+
+/* ------------- get Matrix Mixer IOCTL --------------- */
+
+/* We don't know too much about the new mixer, yet. See madifx.c for the bits
+ * we already have.
+ */
+#define MADIFX_LIST_LENGTH 4096
+#define MADIFX_NUM_OUTPUT_GAINS 198
+#define MADIFX_NUM_LEVEL_PAGES 5
+#define MADIFX_LEVEL_BUFFER_SIZE (MADIFX_NUM_LEVEL_PAGES * 4096)
+
+/* FIXME: maybe move to .c file */
+struct madifx_newmixer {
+	uint32_t listVol[MADIFX_LIST_LENGTH];
+	uint32_t listCh[MADIFX_LIST_LENGTH];
+	uint32_t output_gain[MADIFX_NUM_OUTPUT_GAINS];
+};
+
+struct madifx_mixer_ioctl {
+	struct madifx_newmixer *mixer;
+};
+
+#ifdef CONFIG_SND_MADIFX_BROKEN
+/* use indirect access due to the limit of ioctl bit size */
+#define SNDRV_MADIFX_IOCTL_GET_MIXER _IOR('H', 0x44, struct madifx_mixer_ioctl)
+#endif
+
+#endif
-- 
2.1.0

Re: [PATCH 3/4] ALSA: madifx - Expose preliminary userspace interface

[Takashi Iwai]

On Sat, 08 Aug 2015 18:23:36 +0200,
Adrian Knoth wrote:
> 
> Despite its name "HDSPe", the MADI FX is a new card with a similar but
> different design requiring new userspace tools.
> 
> These tools don't exist, yet, but to facilitate their development,
> expose a preliminary userspace API. Note that the stable bits are always
> enabled while the volatile parts require CONFIG_SND_MADIFX_BROKEN to be
> set.
> 
> Signed-off-by: Adrian Knoth <aknoth@google.com>
> 
> diff --git a/include/uapi/sound/madifx.h b/include/uapi/sound/madifx.h
> new file mode 100644
> index 0000000..6aea609
> --- /dev/null
> +++ b/include/uapi/sound/madifx.h
> @@ -0,0 +1,165 @@
> +#ifndef __SOUND_MADIFX_H
> +#define __SOUND_MADIFX_H
> +/*
> + *   Copyright (C) 2012 Adrian Knoth

Drop the year if you want to avoid confusion...

> + *   based on hdspm.h from Winfried Ritsch (IEM)
> + *   based on hdsp.h from Thomas Charbonnel (thomas@undata.org)
> + *
> + *
> + *   This program is free software; you can redistribute it and/or modify
> + *   it under the terms of the GNU General Public License as published by
> + *   the Free Software Foundation; either version 2 of the License, or
> + *   (at your option) any later version.
> + *
> + *   This program is distributed in the hope that it will be useful,
> + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *   GNU General Public License for more details.
> + *
> + */
> +enum madifx_io_type {
> +	MADIFX
> +};
> +
> +enum madifx_speed {
> +	ss = 0,
> +	ds = 1,
> +	qs = 2
> +};
> +
> +/* -------------------- IOCTL Peak/RMS Meters -------------------- */
> +
> +#ifdef CONFIG_SND_MADIFX_BROKEN
> +struct madifx_level_buffer {
> +	uint32_t rms_out_pre[2 * 256];
> +	uint32_t peak_out_pre[256];
> +
> +	uint32_t rms_in[2 * 256];
> +	uint32_t peak_in[256];
> +
> +	uint32_t rms_play[2 * 256];
> +	uint32_t peak_play[256];
> +
> +	uint32_t rms_out[2 * 256];
> +	uint32_t peak_out[256];
> +
> +	uint32_t rms_in_pre[2 * 256];
> +	uint32_t peak_in_pre[256];
> +
> +	uint8_t speed; /* enum {ss, ds, qs} */
> +};
> +
> +#define SNDRV_MADIFX_IOCTL_GET_LEVEL \
> +	_IOR('H', 0x42, struct madifx_level_buffer)
> +
> +#endif /* CONFIG_SND_MADIFX_BROKEN */
> +
> +/* ------------ CONFIG block IOCTL ---------------------- */
> +
> +struct madifx_config {
> +	uint8_t madi_tx_64[3];
> +	uint8_t madi_smux[3];
> +	uint8_t wcterm;
> +	uint8_t wck48;
> +	uint8_t aespro;
> +	uint8_t redundancy_mode;
> +	uint8_t mirror_madi_out;

Better to have some pads bytes to align the size and for future
extension.

> +};
> +
> +#define SNDRV_MADIFX_IOCTL_GET_CONFIG \
> +	_IOR('H', 0x41, struct madifx_config)
> +
> +
> +/**
> + * The status data reflects the device's current state
> + * as determined by the card's configuration and
> + * connection status.
> + **/
> +
> +enum madifx_sync {
> +	madifx_sync_no_lock = 0,
> +	madifx_sync_lock = 1,
> +	madifx_sync_sync = 2
> +};
> +
> +enum madifx_madi_channel_format {
> +	madifx_format_ch_64 = 0,
> +	madifx_format_ch_56 = 1,
> +	madifx_format_ch_32 = 2,
> +	madifx_format_ch_28 = 3,
> +	madifx_format_ch_16 = 4,
> +	madifx_format_ch_14 = 5,
> +	madifx_format_ch_nolock = 6
> +};
> +
> +enum madifx_madi_frame_format {
> +	madifx_frame_48 = 0,
> +	madifx_frame_96 = 1
> +};
> +
> +enum madifx_syncsource {
> +	syncsource_madi1 = 0,
> +	syncsource_madi2 = 1,
> +	syncsource_madi3 = 2,
> +	syncsource_aes = 3,
> +	syncsource_wc = 4,
> +	syncsource_syncin = 5,
> +	syncsource_none = 6
> +};
> +
> +enum madifx_clocksource {
> +	clock_internal = 0,
> +	clock_aes = 1,
> +	clock_wc = 2,
> +	clock_madi1 = 3,
> +	clock_madi2 = 4,
> +	clock_madi3 = 5,
> +	clock_syncin = 6
> +};
> +
> +
> +struct madifx_status {
> +	/* enum madifx_io_type */
> +	uint8_t card_type;
> +	/* enum madi_clocksource */
> +	uint8_t clock_selection;
> +	uint32_t system_sample_rate;
> +	/* enum madifx_madi_channel_format */
> +	uint8_t madi_channelcount[3];
> +	/* enum madifx_syncsource */
> +	uint32_t external_sample_rates[6];
> +	/* enum madifx_sync, idx: enum madifx_syncsource */
> +	uint8_t sync_check[6];

Here char and int are mixed in the structure, and this leads to bad
portability.  Either put the packed attribute or rethink the field
types nd places.

> +};
> +
> +#define SNDRV_MADIFX_IOCTL_GET_STATUS \
> +	_IOR('H', 0x47, struct madifx_status)
> +
> +
> +/* ------------- get Matrix Mixer IOCTL --------------- */
> +
> +/* We don't know too much about the new mixer, yet. See madifx.c for the bits
> + * we already have.
> + */
> +#define MADIFX_LIST_LENGTH 4096
> +#define MADIFX_NUM_OUTPUT_GAINS 198
> +#define MADIFX_NUM_LEVEL_PAGES 5
> +#define MADIFX_LEVEL_BUFFER_SIZE (MADIFX_NUM_LEVEL_PAGES * 4096)
> +
> +/* FIXME: maybe move to .c file */
> +struct madifx_newmixer {
> +	uint32_t listVol[MADIFX_LIST_LENGTH];
> +	uint32_t listCh[MADIFX_LIST_LENGTH];
> +	uint32_t output_gain[MADIFX_NUM_OUTPUT_GAINS];
> +};
> +
> +struct madifx_mixer_ioctl {
> +	struct madifx_newmixer *mixer;
> +};

Passing a pointer via ioctl is bad for 32/64bit compatibility in
general.  This suggests reconsideration of the API design: do you
really need to copy all these data in a shot?  Or would passing an
index work effectively enough?


thanks,

Takashi

[PATCH 4/4] ALSA: madifx - Add support for RME MADI FX

[Adrian Knoth]

Early support for the new 390 channel RME MADI FX audio interface.
Current status:

 * PCM playback/capture working (SS and DS tested, QS untested)
 * MIDI probably working (untested)
 * All card settings working (e.g. TX64, SMUX, AESpro, WC-Term,
   WC-singlespeed...)
 * Mirror-MADI1-to-Out2+3 maybe working (untested)
 * Redundancy mode maybe working (untested)
 * some ioctls implemented
 * Static mixer working (fixed 1:1 mapping)
 * DSP **NOT** working. RME doesn't intend to release any information
   regarding the DSP.
 * Adjustable mixer **NOT** working (needs new userspace tools)
 * Levelmetering **NOT** working (maybe wrong, needs new userspace
   tools)

See https://github.com/adiknoth/madifx/ for additional information and
helper tools.

Signed-off-by: Adrian Knoth <aknoth@google.com>

diff --git a/sound/pci/rme9652/madifx.c b/sound/pci/rme9652/madifx.c
new file mode 100644
index 0000000..a66c5a4
--- /dev/null
+++ b/sound/pci/rme9652/madifx.c
@@ -0,0 +1,3659 @@
+/*
+ *   ALSA driver for RME Hammerfall DSP MADI FX audio interface(s)
+ *
+ *      Based on hdspm.c
+ *      Copyright (c) 2012-2015 Adrian Knoth <aknoth@google.com>
+ *      Copyright (c) 2003 Winfried Ritsch (IEM)
+ *      code based on hdsp.c   Paul Davis
+ *                             Marcus Andersson
+ *                             Thomas Charbonnel
+ *                             Florian Faber
+ *                             Adrian Knoth
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ */
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/math64.h>
+#include <linux/io.h>
+
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/info.h>
+#include <sound/asoundef.h>
+#include <sound/rawmidi.h>
+#include <sound/hwdep.h>
+#include <sound/initval.h>
+
+#include <sound/madifx.h>
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
+/* Enable this card */
+static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for RME MADIFX interface.");
+
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for RME MADIFX interface.");
+
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable/disable specific MADIFX soundcards.");
+
+
+MODULE_AUTHOR
+(
+	"Adrian Knoth <adi@drcomp.erfurt.thur.de>"
+);
+MODULE_DESCRIPTION("RME MADIFX");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{RME HDSPM-MADIFX}}");
+
+/* --- Write registers. ---
+  These are defined as byte-offsets from the iobase value.  */
+
+#define MADIFX_CONTROL_REG	(0*4)
+#define MADIFX_IRQ_ACK		(3*4)
+#define MADIFX_FREQ_REG		(1*4)
+#define MADIFX_SETTINGS_REG	(2*4)
+#define MADIFX_START_LEVEL	(6*4)
+#define MADIFX_midi_out0_data   (8*4)
+#define MADIFX_midi_out1_data   (9*4)
+#define MADIFX_midi_out2_data	(10*4)
+#define MADIFX_midi_out3_data	(11*4)
+#define MADIFX_ENABLE_OUTPUT	(64*4)
+#define MADIFX_ENABLE_INPUT	(96*4)
+#define MADIFX_MIXER_LIST_VOL	(16384*4)
+#define MADIFX_MIXER_LIST_CH	(20480*4)
+#define MADIFX_WR_OUTPUT_GAIN	((24576+256)*4)
+
+#define MADIFX_SAMPLE_FRAMES_PER_BUFFER		8192
+
+#define MADIFX_PAGE_ADDRESS_LIST   (8192*4)
+
+/* page table size in entries, multiply by 4 to get byte offset */
+#define MADIFX_MAX_PAGE_TABLE_SIZE	4096
+#define MADIFX_LPTI_HMFX    (MADIFX_MAX_PAGE_TABLE_SIZE/2+25*32768*8/4096)
+#define MADIFX_LPTI_MFXT    (MADIFX_MAX_PAGE_TABLE_SIZE/2+26*32768*8/4096)
+
+#define HDSPM_MADI_mixerBase    32768	/* 32768-65535 for 2x64x64 Fader */
+
+#define HDSPM_MATRIX_MIXER_SIZE  8192	/* = 2*64*64 * 4 Byte => 32kB */
+
+/* --- Read registers. ---
+   These are defined as byte-offsets from the iobase value */
+
+#define MADIFX_RD_STATUS	(0*4)
+#define MADIFX_RD_INP_STATUS	(1*4)
+#define MADIFX_RD_INP_FREQ	(2*4)
+#define MADIFX_RD_PLL_FREQ	(3*4)
+/* MADIFX_RD_VERSION is encoded as
+ * card_type(7..0) & "0000" & build(19..0)
+ */
+#define MADIFX_RD_VERSION	(4*4)
+#define MADIFX_RD_FLASH		(5*4)
+#define MADIFX_RD_BARCODE0	(6*4)
+#define MADIFX_RD_BARCODE1	(7*4)
+#define MADIFX_RD_DSP_DATA	(8*4)
+#define MADIFX_RD_DSP_STATUS	(9*4)
+#define MADIFX_midi_in0_data	(12*4)
+#define MADIFX_midi_in1_data	(13*4)
+#define MADIFX_midi_in2_data	(14*4)
+#define MADIFX_midi_in3_data	(15*4)
+#define MADIFX_midi_out0_status	(16*4)
+#define MADIFX_midi_out1_status	(17*4)
+#define MADIFX_midi_out2_status	(18*4)
+#define MADIFX_midi_out3_status	(19*4)
+#define MADIFX_midi_in0_status	(20*4)
+#define MADIFX_midi_in1_status	(21*4)
+#define MADIFX_midi_in2_status	(22*4)
+#define MADIFX_midi_in3_status	(23*4)
+
+/* input status */
+
+#define MADIFX_madi1_lock	0x0001
+#define MADIFX_madi2_lock	0x0002
+#define MADIFX_madi3_lock	0x0004
+#define MADIFX_aes_lock		0x0008
+#define MADIFX_word_lock	0x0010
+#define MADIFX_madi1_sync	0x0020
+#define MADIFX_madi2_sync	0x0040
+#define MADIFX_madi3_sync	0x0080
+#define MADIFX_word_sync	0x0100
+#define MADIFX_aes_sync		0x0200
+#define MADIFX_madi1_rx_64ch	0x0400
+#define MADIFX_madi2_rx_64ch	0x0800
+#define MADIFX_madi3_rx_64ch	0x1000
+#define MADIFX_SelSyncRef0	0x2000
+#define MADIFX_SelSyncRef1	0x4000
+#define MADIFX_SelSyncRef2	0x8000
+#define MADIFX_MADIInput0	0x10000
+#define MADIFX_MADIInput1	0x20000
+#define MADIFX_redundancy_rb	0x40000
+#define MADIFX_mirror_out_rb	0x80000
+#define MADIFX_sync_in_lock	0x100000
+#define MADIFX_sync_in_sync	0x200000
+
+/* control register bits */
+
+#define MADIFX_START		0x00000001
+#define MADIFX_freq0		0x00000002
+#define MADIFX_freq1		0x00000004
+#define MADIFX_freq2		0x00000008
+#define MADIFX_freq3		0x00000010
+#define MADIFX_BUF_SIZ_0	0x00000020
+#define MADIFX_BUF_SIZ_1	0x00000040
+#define MADIFX_BUF_SIZ_2	0x00000080
+#define MADIFX_LAT_0		0x00000100
+#define MADIFX_LAT_1		0x00000200
+#define MADIFX_LAT_2		0x00000400
+#define MADIFX_LAT_3		0x00000800
+#define MADIFX_IE_AUDIO		0x00001000
+#define MADIFX_IEN0		0x00002000
+#define MADIFX_IEN1		0x00004000
+#define MADIFX_IEN2		0x00008000
+#define MADIFX_IEN3		0x00010000
+#define MADIFX_float_format	0x00020000
+#define MADIFX_CLR_TMS		0x00040000
+#define MADIFX_Dolby		0x00080000
+
+#define MADIFX_kFrequencyMask \
+		(MADIFX_freq0 + MADIFX_freq1 + MADIFX_freq2 + MADIFX_freq3)
+#define MADIFX_kBufferPositionMask	0xFFF0
+
+enum {
+	MADIFX_kFrequency32kHz	  = 0,
+	MADIFX_kFrequency44_1kHz  = MADIFX_freq0,
+	MADIFX_kFrequency48kHz    = MADIFX_freq1,
+	MADIFX_kFrequency64kHz	  = MADIFX_freq2 + 0,
+	MADIFX_kFrequency88_2kHz  = MADIFX_freq2 + MADIFX_freq0,
+	MADIFX_kFrequency96kHz	  = MADIFX_freq2 + MADIFX_freq1,
+	MADIFX_kFrequency128kHz	  = MADIFX_freq3 + MADIFX_freq2 + 0,
+	MADIFX_kFrequency176_4kHz = MADIFX_freq3 + MADIFX_freq2 + MADIFX_freq0,
+	MADIFX_kFrequency192kHz	  = MADIFX_freq3 + MADIFX_freq2 + MADIFX_freq1
+};
+
+/* settings register bits */
+
+#define MADIFX_SyncRef0		0x00000001
+#define MADIFX_SyncRef1		0x00000002
+#define MADIFX_SyncRef2		0x00000004
+#define MADIFX_PRO		0x00000008
+#define MADIFX_DSP_EN		0x00000010
+#define MADIFX_WCK_TERM		0x00000020
+#define MADIFX_WCK48		0x00000040
+#define MADIFX_madi1_tx_64ch	0x00000080
+#define MADIFX_madi2_tx_64ch	0x00000100
+#define MADIFX_madi3_tx_64ch	0x00000200
+#define MADIFX_madi1_smux	0x00000400
+#define MADIFX_madi2_smux	0x00000800
+#define MADIFX_madi3_smux	0x00001000
+#define MADIFX_redundancy_mode	0x00002000
+#define MADIFX_mirror_madi_out	0x00004000
+
+#define MADIFX_SyncRefMask (MADIFX_SyncRef0 | MADIFX_SyncRef1 | MADIFX_SyncRef2)
+
+/* input freq register bits */
+
+#define MADIFX_madi1_freq0	0x00001
+#define MADIFX_madi1_freq1	0x00002
+#define MADIFX_madi1_freq2	0x00004
+#define MADIFX_madi1_freq3	0x00008
+#define MADIFX_madi2_freq0	0x00010
+#define MADIFX_madi2_freq1	0x00020
+#define MADIFX_madi2_freq2	0x00040
+#define MADIFX_madi2_freq3	0x00080
+#define MADIFX_madi3_freq0	0x00100
+#define MADIFX_madi3_freq1	0x00200
+#define MADIFX_madi3_freq2	0x00400
+#define MADIFX_madi3_freq3	0x00800
+#define MADIFX_aes_freq0	0x01000
+#define MADIFX_aes_freq1	0x02000
+#define MADIFX_aes_freq2	0x04000
+#define MADIFX_aes_freq3	0x08000
+#define MADIFX_word_freq0	0x10000
+#define MADIFX_word_freq1	0x20000
+#define MADIFX_word_freq2	0x40000
+#define MADIFX_word_freq3	0x80000
+#define MADIFX_sync_in_freq0	0x100000
+#define MADIFX_sync_in_freq1	0x200000
+#define MADIFX_sync_in_freq2	0x400000
+#define MADIFX_sync_in_freq3	0x800000
+
+/* Index to DMA level buffer in uint32_t units */
+#define MADIFX_RD_RMS_IN	(0*1)
+#define MADIFX_RD_PEAK_IN	(512*1)
+#define MADIFX_RD_RMS_PLAY	(1024*1)
+#define MADIFX_RD_PEAK_PLAY	(1536*1)
+#define MADIFX_RD_RMS_OUT	(2048*1)
+#define MADIFX_RD_PEAK_OUT	(2560*1)
+#define MADIFX_RD_RMS_IN_PRE	(3072*1)
+#define MADIFX_RD_PEAK_IN_PRE	(3584*1)
+#define MADIFX_RD_RMS_OUT_PRE	(4096*1)
+#define MADIFX_RD_PEAK_OUT_PRE	(4608*1)
+
+/* MADIFX MIDI Interrupt enable */
+#define MADIFX_IEN0		0x00002000
+#define MADIFX_IEN1		0x00004000
+#define MADIFX_IEN2		0x00008000
+#define MADIFX_IEN3		0x00010000
+
+/* status register, MIDI IRQ Pending */
+#define MADIFX_mIRQ0		0x10000000
+#define MADIFX_mIRQ1		0x20000000
+#define MADIFX_mIRQ2		0x40000000
+#define MADIFX_mIRQ3		0x80000000
+
+/* --- bit helper defines */
+#define MADIFX_LatencyMask (MADIFX_LAT_0|MADIFX_LAT_1|MADIFX_LAT_2|MADIFX_LAT_3)
+
+#define madifx_encode_latency(x)       (((x)<<8) & MADIFX_LatencyMask)
+#define madifx_decode_latency(x)       ((((x) & MADIFX_LatencyMask)>>8))
+
+/* speemode is enum 0,1,2 for ss/ds/qs, so (1<<speedmode) returns 1, 2, 4. */
+#define madifx_speed_multiplier(x)	(1<<(x)->speedmode)
+
+
+#define HDSPM_audioIRQPending    (1<<0)	/* IRQ is high and pending */
+
+
+
+/* Mixer Values */
+#define UNITY_GAIN          32768	/* = 65536/2 */
+#define MINUS_INFINITY_GAIN 0
+
+/* Number of channels for different Speed Modes */
+#define MADIFX_SS_IN_CHANNELS       194
+#define MADIFX_DS_IN_CHANNELS       98
+#define MADIFX_QS_IN_CHANNELS       50
+
+#define MADIFX_SS_OUT_CHANNELS       196
+#define MADIFX_DS_OUT_CHANNELS       100
+#define MADIFX_QS_OUT_CHANNELS       52
+
+
+#define HDSPM_MADIFX_REV	213
+
+/* speed factor modes */
+#define HDSPM_SPEED_SINGLE 0
+#define HDSPM_SPEED_DOUBLE 1
+#define HDSPM_SPEED_QUAD   2
+
+/* DMA buffers in byte; 8192 samples per channel, each 4 bytes wide */
+#define NUM_INPUTS_S_MFXT	(64*3+4)
+#define NUM_OUTPUTS_S_MFXT	(64*3+6)
+#define INPUT_DMA_BUFFER_SIZE (NUM_INPUTS_S_MFXT*32768)
+#define OUTPUT_DMA_BUFFER_SIZE (NUM_OUTPUTS_S_MFXT*32768)
+
+
+
+/* names for speed modes */
+static char *madifx_speed_names[] = { "single", "double", "quad" };
+
+static const char *const texts_madifx_clock_source[] = {
+	"Internal",
+	"Word Clock", /* OSX driver has first AES, then WC, but real HW is
+			 different */
+	"AES In",
+	"MADI 1 In",
+	"MADI 2 In",
+	"MADI 3 In",
+	"Sync In"
+};
+
+
+static const char *const texts_freq[] = {
+	"No Lock",
+	"32 kHz",
+	"44.1 kHz",
+	"48 kHz",
+	"64 kHz",
+	"88.2 kHz",
+	"96 kHz",
+	"128 kHz",
+	"176.4 kHz",
+	"192 kHz"
+};
+
+
+struct madifx_midi {
+	struct mfx *mfx;
+	int id;
+	struct snd_rawmidi *rmidi;
+	struct snd_rawmidi_substream *input;
+	struct snd_rawmidi_substream *output;
+	char istimer;		/* timer in use */
+	struct timer_list timer;
+	spinlock_t lock;
+	int pending;
+	int dataIn;
+	int statusIn;
+	int dataOut;
+	int statusOut;
+	int ie;
+	int irq;
+};
+
+
+struct mfx {
+	spinlock_t lock;
+	/* only one playback and/or capture stream */
+	struct snd_pcm_substream *capture_substream;
+	struct snd_pcm_substream *playback_substream;
+
+	char *card_name;	     /* for procinfo */
+	unsigned short firmware_rev;
+
+	uint8_t io_type;
+
+	int monitor_outs;	/* set up monitoring outs init flag */
+
+	u32 control_register;	/* cached value */
+	u32 control2_register;	/* cached value */
+	u32 settings_register;
+
+	struct madifx_midi midi[4];
+	struct tasklet_struct midi_tasklet;
+
+	size_t period_bytes;
+	unsigned char ss_in_channels;
+	unsigned char ds_in_channels;
+	unsigned char qs_in_channels;
+	unsigned char ss_out_channels;
+	unsigned char ds_out_channels;
+	unsigned char qs_out_channels;
+
+	unsigned char max_channels_in;
+	unsigned char max_channels_out;
+
+	char **port_names_in;
+	char **port_names_out;
+
+	char **port_names_in_ss, **port_names_in_ds, **port_names_in_qs;
+	char **port_names_out_ss, **port_names_out_ds, **port_names_out_qs;
+
+	unsigned char *playback_buffer;	/* suitably aligned address */
+	unsigned char *capture_buffer;	/* suitably aligned address */
+	u32 *level_buffer;	/* suitably aligned address */
+
+	pid_t capture_pid;	/* process id which uses capture */
+	pid_t playback_pid;	/* process id which uses capture */
+	int running;		/* running status */
+
+	int last_external_sample_rate;	/* samplerate mystic ... */
+	int last_internal_sample_rate;
+	int system_sample_rate;
+
+	int dev;		/* Hardware vars... */
+	int irq;
+	unsigned long port;
+	void __iomem *iobase;
+
+	int irq_count;		/* for debug */
+	int midiPorts;
+
+	struct snd_card *card;	/* one card */
+	struct snd_pcm *pcm;		/* has one pcm */
+	struct snd_hwdep *hwdep;	/* and a hwdep for additional ioctl */
+	struct pci_dev *pci;	/* and an pci info */
+
+	/* Mixer vars */
+	/* full mixer accessible over mixer ioctl or hwdep-device */
+	struct madifx_newmixer *newmixer;
+	dma_addr_t *dmaPageTable;
+
+	const char *const *texts_clocksource;
+	int texts_clocksource_items;
+
+	cycles_t last_interrupt;
+
+	unsigned int serial;
+
+	int speedmode;
+
+#ifdef CONFIG_SND_MADIFX_BROKEN
+	struct snd_dma_buffer dmaLevelBuffer;
+	struct madifx_level_buffer peak_rms;
+#endif
+
+};
+
+
+static const struct pci_device_id snd_madifx_ids[] = {
+	{
+	 .vendor = PCI_VENDOR_ID_XILINX,
+	 .device = 0x3fc7,
+	 .subvendor = PCI_ANY_ID,
+	 .subdevice = PCI_ANY_ID,
+	 .class = 0,
+	 .class_mask = 0,
+	 .driver_data = 0},
+	{0,}
+};
+
+MODULE_DEVICE_TABLE(pci, snd_madifx_ids);
+
+/* prototypes */
+static int snd_madifx_create_alsa_devices(struct snd_card *card,
+						   struct mfx *mfx);
+static int snd_madifx_create_pcm(struct snd_card *card,
+					  struct mfx *mfx);
+
+static inline void snd_madifx_initialize_midi_flush(struct mfx *mfx);
+static int madifx_external_freq_index(struct mfx *mfx,
+				      enum madifx_syncsource port);
+static int madifx_get_clock_select(struct mfx *mfx);
+static int snd_madifx_set_defaults(struct mfx *mfx);
+static int madifx_system_clock_mode(struct mfx *mfx);
+
+static inline int HDSPM_bit2freq(int n)
+{
+	static const int bit2freq_tab[] = {
+		0, 32000, 44100, 48000, 64000, 88200,
+		96000, 128000, 176400, 192000 };
+	if (n < 1 || n > 9)
+		return 0;
+	return bit2freq_tab[n];
+}
+
+/* Write/read to/from HDSPM with Adresses in Bytes
+   not words but only 32Bit writes are allowed */
+
+static inline void madifx_write(struct mfx *mfx, unsigned int reg,
+			       unsigned int val)
+{
+	writel(val, mfx->iobase + reg);
+}
+
+static inline unsigned int madifx_read(struct mfx *mfx, unsigned int reg)
+{
+	return readl(mfx->iobase + reg);
+}
+
+/* enable DMA for specific channels, now available for DSP-MADI */
+static inline void snd_madifx_enable_in(struct mfx *mfx, int i, int v)
+{
+	madifx_write(mfx, MADIFX_ENABLE_INPUT + (4 * i), v);
+}
+
+static inline void snd_madifx_enable_out(struct mfx *mfx, int i, int v)
+{
+	madifx_write(mfx, MADIFX_ENABLE_OUTPUT + (4 * i), v);
+}
+
+/* check if same process is writing and reading */
+static int snd_madifx_use_is_exclusive(struct mfx *mfx)
+{
+	unsigned long flags;
+	int ret = 1;
+
+	spin_lock_irqsave(&mfx->lock, flags);
+	if ((mfx->playback_pid != mfx->capture_pid) &&
+	    (mfx->playback_pid >= 0) && (mfx->capture_pid >= 0)) {
+		ret = 0;
+	}
+	spin_unlock_irqrestore(&mfx->lock, flags);
+	return ret;
+}
+
+
+/* return latency in samples per period */
+static int madifx_get_latency(struct mfx *mfx)
+{
+	int n;
+
+	n = madifx_decode_latency(mfx->control_register);
+
+	return 1 << (n + 5);
+}
+
+/* Latency function */
+static inline void madifx_compute_period_size(struct mfx *mfx)
+{
+	mfx->period_bytes = 4 * madifx_get_latency(mfx);
+}
+
+
+/* position of the hardware pointer in the buffer */
+static snd_pcm_uframes_t madifx_hw_pointer(struct mfx *mfx)
+{
+	u32 position;
+
+	position = madifx_read(mfx, MADIFX_RD_STATUS);
+
+	position &= MADIFX_kBufferPositionMask;
+	position >>= 4;
+	position *= 4;
+#if 0
+	position -= 4; /* safety offset */
+#endif
+	position &= (MADIFX_SAMPLE_FRAMES_PER_BUFFER-1);
+
+	return position;
+}
+
+static inline void madifx_start_audio(struct mfx *s)
+{
+	s->control_register |= (MADIFX_IE_AUDIO | MADIFX_START);
+	madifx_write(s, MADIFX_CONTROL_REG, s->control_register);
+}
+
+static inline void madifx_stop_audio(struct mfx *s)
+{
+	s->control_register &= ~(MADIFX_START | MADIFX_IE_AUDIO);
+	madifx_write(s, MADIFX_CONTROL_REG, s->control_register);
+}
+
+static void madifx_silence_playback(struct mfx *mfx)
+{
+	void *buf = mfx->playback_buffer;
+
+	if (buf == NULL)
+		return;
+
+	memset(buf, 0, OUTPUT_DMA_BUFFER_SIZE);
+}
+
+static int madifx_set_interrupt_interval(struct mfx *s, unsigned int frames)
+{
+	int n;
+
+	spin_lock_irq(&s->lock);
+
+	/* FIXME: We have four bits, but we don't know the mapping to frames,
+	 * yet.
+	 * LAT_3 is 2048
+	 * LAT_2 is 128
+	 * LAT_1 is 32
+	 * LAT_0 is 16
+	 *
+	 * 2^(n+4), encode n to 4 bits
+	 */
+	n = 0;
+	frames >>= 6;
+	while (frames) {
+		n++;
+		frames >>= 1;
+	}
+
+	s->control_register &= ~MADIFX_LatencyMask;
+	s->control_register |= madifx_encode_latency(n);
+
+	madifx_write(s, MADIFX_CONTROL_REG, s->control_register);
+
+	madifx_compute_period_size(s);
+
+	spin_unlock_irq(&s->lock);
+
+	return 0;
+}
+
+static u64 madifx_calc_dds_value(struct mfx *mfx, u64 period)
+{
+	u64 freq_const;
+
+	if (period == 0)
+		return 0;
+
+	switch (mfx->io_type) {
+	case MADIFX:
+		freq_const = 131072000000000ULL;
+		break;
+	default:
+		snd_BUG();
+		return 0;
+	}
+
+	return div_u64(freq_const, period);
+}
+
+
+static void madifx_set_dds_value(struct mfx *mfx, int rate)
+{
+	u64 n;
+
+	if (rate >= 112000)
+		rate /= 4;
+	else if (rate >= 56000)
+		rate /= 2;
+
+	switch (mfx->io_type) {
+	case MADIFX:
+		n = 131072000000000ULL;  /* 125 MHz */
+		break;
+	default:
+		snd_BUG();
+		return;
+	}
+
+	n = div_u64(n, rate);
+	/* n should be less than 2^32 for being written to FREQ register */
+	snd_BUG_ON(n >> 32);
+	madifx_write(mfx, MADIFX_FREQ_REG, (u32)n);
+}
+
+static int madifx_get_external_rate(struct mfx *mfx)
+{
+	int current_clock = madifx_get_clock_select(mfx);
+
+	/* map to enum madifx_syncsource */
+	switch (current_clock) {
+	case 0:
+	case 6:
+		/* Master or Sync-In */
+		break;
+	case 1:
+		current_clock = syncsource_wc;
+		break;
+	case 2:
+		current_clock = syncsource_aes;
+		break;
+	case 3:
+	case 4:
+	case 5:
+		/* MADI1 == 3, MADI2 == 4, MADI3 == 5 map to
+		 * MADI1 == 0, MADI2 = 1, MADI3 == 2
+		 */
+		current_clock -= 3;
+		break;
+	default:
+		dev_err(mfx->card->dev,
+				"MADIFX: Unknown clock source\n");
+		return 0;
+	}
+
+
+
+	return HDSPM_bit2freq(madifx_external_freq_index(mfx, current_clock));
+}
+
+/* dummy set rate lets see what happens */
+static int madifx_set_rate(struct mfx *mfx, int rate, int called_internally)
+{
+	int current_rate;
+	int rate_bits;
+	int not_set = 0;
+	int current_speed, target_speed;
+
+	/* ASSUMPTION: mfx->lock is either set, or there is no need for
+	   it (e.g. during module initialization).
+	 */
+
+	if (1 == madifx_system_clock_mode(mfx)) {
+
+		/* SLAVE --- */
+		if (called_internally) {
+
+			/* request from ctl or card initialization
+			   just make a warning an remember setting
+			   for future master mode switching */
+
+			dev_warn(mfx->card->dev,
+				"MADIFX: Warning: device is not running as a clock master.\n");
+			not_set = 1;
+		} else {
+			int external_freq = madifx_get_external_rate(mfx);
+
+
+
+			if (rate != external_freq) {
+				dev_warn(mfx->card->dev,
+				    "MADIFX: Warning: Requested rate %d doesn't match external rate %d\n",
+				    rate, external_freq);
+				not_set = 1;
+			}
+		}
+	}
+
+	current_rate = mfx->system_sample_rate;
+
+	/* Changing between Singe, Double and Quad speed is not
+	   allowed if any substreams are open. This is because such a change
+	   causes a shift in the location of the DMA buffers and a reduction
+	   in the number of available buffers.
+
+	   Note that a similar but essentially insoluble problem exists for
+	   externally-driven rate changes. All we can do is to flag rate
+	   changes in the read/write routines.
+	 */
+
+	if (current_rate <= 56000)
+		current_speed = HDSPM_SPEED_SINGLE;
+	else if (current_rate <= 96000)
+		current_speed = HDSPM_SPEED_DOUBLE;
+	else
+		current_speed = HDSPM_SPEED_QUAD;
+
+	if (rate <= 48000)
+		target_speed = HDSPM_SPEED_SINGLE;
+	else if (rate <= 112000)
+		target_speed = HDSPM_SPEED_DOUBLE;
+	else
+		target_speed = HDSPM_SPEED_QUAD;
+
+	switch (rate) {
+	case 32000:
+		rate_bits = MADIFX_kFrequency32kHz;
+		break;
+	case 44100:
+		rate_bits = MADIFX_kFrequency44_1kHz;
+		break;
+	case 48000:
+		rate_bits = MADIFX_kFrequency48kHz;
+		break;
+	case 64000:
+		rate_bits = MADIFX_kFrequency64kHz;
+		break;
+	case 88200:
+		rate_bits = MADIFX_kFrequency88_2kHz;
+		break;
+	case 96000:
+		rate_bits = MADIFX_kFrequency96kHz;
+		break;
+	case 128000:
+		rate_bits = MADIFX_kFrequency128kHz;
+		break;
+	case 176400:
+		rate_bits = MADIFX_kFrequency176_4kHz;
+		break;
+	case 192000:
+		rate_bits = MADIFX_kFrequency192kHz;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (current_speed != target_speed
+	    && (mfx->capture_pid >= 0 || mfx->playback_pid >= 0)) {
+		dev_err
+		    (mfx->card->dev,
+		     "MADIFX: cannot change from %s speed to %s speed mode (capture PID = %d, playback PID = %d)\n",
+		     madifx_speed_names[current_speed],
+		     madifx_speed_names[target_speed],
+		     mfx->capture_pid, mfx->playback_pid);
+		return -EBUSY;
+	}
+
+	madifx_set_dds_value(mfx, rate);
+
+	mfx->control_register &= ~MADIFX_kFrequencyMask;
+	mfx->control_register |= rate_bits;
+	madifx_write(mfx, MADIFX_CONTROL_REG, mfx->control_register);
+
+
+
+	mfx->system_sample_rate = rate;
+
+	if (rate <= 56000) {
+		mfx->max_channels_in = mfx->ss_in_channels;
+		mfx->max_channels_out = mfx->ss_out_channels;
+		mfx->port_names_in = mfx->port_names_in_ss;
+		mfx->port_names_out = mfx->port_names_out_ss;
+		mfx->speedmode = ss;
+	} else if (rate <= 112000) {
+		mfx->max_channels_in = mfx->ds_in_channels;
+		mfx->max_channels_out = mfx->ds_out_channels;
+		mfx->port_names_in = mfx->port_names_in_ds;
+		mfx->port_names_out = mfx->port_names_out_ds;
+		mfx->speedmode = ds;
+	} else {
+		mfx->max_channels_in = mfx->qs_in_channels;
+		mfx->max_channels_out = mfx->qs_out_channels;
+		mfx->port_names_in = mfx->port_names_in_qs;
+		mfx->port_names_out = mfx->port_names_out_qs;
+		mfx->speedmode = qs;
+	}
+
+	if (not_set != 0)
+		return -1;
+
+	return 0;
+}
+
+/*----------------------------------------------------------------------------
+   MIDI
+  ----------------------------------------------------------------------------*/
+
+static inline unsigned char snd_madifx_midi_read_byte(struct mfx *mfx,
+						      int id)
+{
+	/* the hardware already does the relevant bit-mask with 0xff */
+	return madifx_read(mfx, mfx->midi[id].dataIn);
+}
+
+static inline void snd_madifx_midi_write_byte(struct mfx *mfx, int id,
+					      int val)
+{
+	/* the hardware already does the relevant bit-mask with 0xff */
+	return madifx_write(mfx, mfx->midi[id].dataOut, val);
+}
+
+static inline int snd_madifx_midi_input_available(struct mfx *mfx, int id)
+{
+	return madifx_read(mfx, mfx->midi[id].statusIn) & 0xFF;
+}
+
+static inline int snd_madifx_midi_output_possible(struct mfx *mfx, int id)
+{
+	int fifo_bytes_used;
+
+	fifo_bytes_used = madifx_read(mfx, mfx->midi[id].statusOut) & 0xFF;
+
+	if (fifo_bytes_used < 128)
+		return  128 - fifo_bytes_used;
+	else
+		return 0;
+}
+
+static void snd_madifx_flush_midi_input(struct mfx *mfx, int id)
+{
+	while (snd_madifx_midi_input_available(mfx, id))
+		snd_madifx_midi_read_byte(mfx, id);
+}
+
+static int snd_madifx_midi_output_write(struct madifx_midi *hmidi)
+{
+	unsigned long flags;
+	int n_pending;
+	int to_write;
+	int i;
+	unsigned char buf[128];
+
+	/* Output is not interrupt driven */
+
+	spin_lock_irqsave(&hmidi->lock, flags);
+	if (hmidi->output &&
+	    !snd_rawmidi_transmit_empty(hmidi->output)) {
+		n_pending = snd_madifx_midi_output_possible(hmidi->mfx,
+							    hmidi->id);
+		if (n_pending > 0) {
+			if (n_pending > (int)sizeof(buf))
+				n_pending = sizeof(buf);
+
+			to_write = snd_rawmidi_transmit(hmidi->output, buf,
+							 n_pending);
+			if (to_write > 0) {
+				for (i = 0; i < to_write; ++i)
+					snd_madifx_midi_write_byte(hmidi->mfx,
+								   hmidi->id,
+								   buf[i]);
+			}
+		}
+	}
+	spin_unlock_irqrestore(&hmidi->lock, flags);
+	return 0;
+}
+
+static int snd_madifx_midi_input_read(struct madifx_midi *hmidi)
+{
+	unsigned char buf[128]; /* this buffer is designed to match the MIDI
+				 * input FIFO size
+				 */
+	unsigned long flags;
+	int n_pending;
+	int i;
+
+	spin_lock_irqsave(&hmidi->lock, flags);
+	n_pending = snd_madifx_midi_input_available(hmidi->mfx, hmidi->id);
+	if (n_pending > 0) {
+		if (hmidi->input) {
+			if (n_pending > (int)sizeof(buf))
+				n_pending = sizeof(buf);
+			for (i = 0; i < n_pending; ++i)
+				buf[i] = snd_madifx_midi_read_byte(hmidi->mfx,
+								   hmidi->id);
+			if (n_pending)
+				snd_rawmidi_receive(hmidi->input, buf,
+						     n_pending);
+		} else {
+			/* flush the MIDI input FIFO */
+			while (n_pending--)
+				snd_madifx_midi_read_byte(hmidi->mfx,
+							  hmidi->id);
+		}
+	}
+	hmidi->pending = 0;
+	spin_unlock_irqrestore(&hmidi->lock, flags);
+
+	spin_lock_irqsave(&hmidi->mfx->lock, flags);
+	hmidi->mfx->control_register |= hmidi->ie;
+	madifx_write(hmidi->mfx, MADIFX_CONTROL_REG,
+		    hmidi->mfx->control_register);
+	spin_unlock_irqrestore(&hmidi->mfx->lock, flags);
+
+	return snd_madifx_midi_output_write(hmidi);
+}
+
+static void
+snd_madifx_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+	struct mfx *mfx;
+	struct madifx_midi *hmidi;
+	unsigned long flags;
+
+	hmidi = substream->rmidi->private_data;
+	mfx = hmidi->mfx;
+
+	spin_lock_irqsave(&mfx->lock, flags);
+	if (up) {
+		if (!(mfx->control_register & hmidi->ie)) {
+			snd_madifx_flush_midi_input(mfx, hmidi->id);
+			mfx->control_register |= hmidi->ie;
+		}
+	} else {
+		mfx->control_register &= ~hmidi->ie;
+	}
+
+	madifx_write(mfx, MADIFX_CONTROL_REG, mfx->control_register);
+	spin_unlock_irqrestore(&mfx->lock, flags);
+}
+
+static void snd_madifx_midi_output_timer(unsigned long data)
+{
+	struct madifx_midi *hmidi = (struct madifx_midi *) data;
+	unsigned long flags;
+
+	snd_madifx_midi_output_write(hmidi);
+	spin_lock_irqsave(&hmidi->lock, flags);
+
+	/* this does not bump hmidi->istimer, because the
+	   kernel automatically removed the timer when it
+	   expired, and we are now adding it back, thus
+	   leaving istimer wherever it was set before.
+	*/
+
+	if (hmidi->istimer)
+		mod_timer(&hmidi->timer, 1 + jiffies);
+
+	spin_unlock_irqrestore(&hmidi->lock, flags);
+}
+
+static void
+snd_madifx_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+	struct madifx_midi *hmidi;
+	unsigned long flags;
+
+	hmidi = substream->rmidi->private_data;
+	spin_lock_irqsave(&hmidi->lock, flags);
+	if (up) {
+		if (!hmidi->istimer) {
+			setup_timer(&hmidi->timer, snd_madifx_midi_output_timer,
+					(unsigned long) hmidi);
+			mod_timer(&hmidi->timer, 1 + jiffies);
+			hmidi->istimer++;
+		}
+	} else {
+		if (hmidi->istimer && --hmidi->istimer <= 0)
+			del_timer(&hmidi->timer);
+	}
+	spin_unlock_irqrestore(&hmidi->lock, flags);
+	if (up)
+		snd_madifx_midi_output_write(hmidi);
+}
+
+static int snd_madifx_midi_input_open(struct snd_rawmidi_substream *substream)
+{
+	struct madifx_midi *hmidi;
+
+	hmidi = substream->rmidi->private_data;
+	spin_lock_irq(&hmidi->lock);
+	snd_madifx_flush_midi_input(hmidi->mfx, hmidi->id);
+	hmidi->input = substream;
+	spin_unlock_irq(&hmidi->lock);
+
+	return 0;
+}
+
+static int snd_madifx_midi_output_open(struct snd_rawmidi_substream *substream)
+{
+	struct madifx_midi *hmidi;
+
+	hmidi = substream->rmidi->private_data;
+	spin_lock_irq(&hmidi->lock);
+	hmidi->output = substream;
+	spin_unlock_irq(&hmidi->lock);
+
+	return 0;
+}
+
+static int snd_madifx_midi_input_close(struct snd_rawmidi_substream *substream)
+{
+	struct madifx_midi *hmidi;
+
+	snd_madifx_midi_input_trigger(substream, 0);
+
+	hmidi = substream->rmidi->private_data;
+	spin_lock_irq(&hmidi->lock);
+	hmidi->input = NULL;
+	spin_unlock_irq(&hmidi->lock);
+
+	return 0;
+}
+
+static int snd_madifx_midi_output_close(struct snd_rawmidi_substream *substream)
+{
+	struct madifx_midi *hmidi;
+
+	snd_madifx_midi_output_trigger(substream, 0);
+
+	hmidi = substream->rmidi->private_data;
+	spin_lock_irq(&hmidi->lock);
+	hmidi->output = NULL;
+	spin_unlock_irq(&hmidi->lock);
+
+	return 0;
+}
+
+static struct snd_rawmidi_ops snd_madifx_midi_output = {
+	.open =		snd_madifx_midi_output_open,
+	.close =	snd_madifx_midi_output_close,
+	.trigger =	snd_madifx_midi_output_trigger,
+};
+
+static struct snd_rawmidi_ops snd_madifx_midi_input = {
+	.open =		snd_madifx_midi_input_open,
+	.close =	snd_madifx_midi_input_close,
+	.trigger =	snd_madifx_midi_input_trigger,
+};
+
+static int snd_madifx_create_midi(struct snd_card *card,
+					    struct mfx *mfx, int id)
+{
+	int err;
+	char buf[32];
+
+	mfx->midi[id].id = id;
+	mfx->midi[id].mfx = mfx;
+	spin_lock_init(&mfx->midi[id].lock);
+
+	switch (id) {
+	case 0:
+		mfx->midi[0].dataIn = MADIFX_midi_in0_data;
+		mfx->midi[0].statusIn = MADIFX_midi_in0_status;
+		mfx->midi[0].dataOut = MADIFX_midi_out0_data;
+		mfx->midi[0].statusOut = MADIFX_midi_out0_status;
+		mfx->midi[0].ie = MADIFX_IEN0;
+		mfx->midi[0].irq = MADIFX_mIRQ0;
+		break;
+
+	case 1:
+		mfx->midi[1].dataIn = MADIFX_midi_in1_data;
+		mfx->midi[1].statusIn = MADIFX_midi_in1_status;
+		mfx->midi[1].dataOut = MADIFX_midi_out1_data;
+		mfx->midi[1].statusOut = MADIFX_midi_out1_status;
+		mfx->midi[1].ie = MADIFX_IEN1;
+		mfx->midi[1].irq = MADIFX_mIRQ1;
+		break;
+
+	case 2:
+		mfx->midi[2].dataIn = MADIFX_midi_in2_data;
+		mfx->midi[2].statusIn = MADIFX_midi_in2_status;
+		mfx->midi[2].dataOut = MADIFX_midi_out2_data;
+		mfx->midi[2].statusOut = MADIFX_midi_out2_status;
+		mfx->midi[2].ie = MADIFX_IEN2;
+		mfx->midi[2].irq = MADIFX_mIRQ2;
+		break;
+
+	case 3:
+		mfx->midi[3].dataIn = MADIFX_midi_in3_data;
+		mfx->midi[3].statusIn = MADIFX_midi_in3_status;
+		mfx->midi[3].dataOut = MADIFX_midi_out3_data;
+		mfx->midi[3].statusOut = MADIFX_midi_out3_status;
+		mfx->midi[3].ie = MADIFX_IEN3;
+		mfx->midi[3].irq = MADIFX_mIRQ3;
+		break;
+
+	default:
+		dev_err(mfx->card->dev,
+				"MADIFX: Unknown MIDI port %i\n", id);
+		return -EINVAL;
+
+	}
+
+	sprintf(buf, "%s MIDIoverMADI %d", card->shortname, id+1);
+
+	err = snd_rawmidi_new(card, buf, id, 1, 1,
+			&mfx->midi[id].rmidi);
+	if (err < 0)
+		return err;
+
+	sprintf(mfx->midi[id].rmidi->name, "%s MIDI %d",
+			card->id, id+1);
+	mfx->midi[id].rmidi->private_data = &mfx->midi[id];
+
+	snd_rawmidi_set_ops(mfx->midi[id].rmidi,
+			SNDRV_RAWMIDI_STREAM_OUTPUT,
+			&snd_madifx_midi_output);
+	snd_rawmidi_set_ops(mfx->midi[id].rmidi,
+			SNDRV_RAWMIDI_STREAM_INPUT,
+			&snd_madifx_midi_input);
+
+	mfx->midi[id].rmidi->info_flags |=
+		SNDRV_RAWMIDI_INFO_OUTPUT |
+		SNDRV_RAWMIDI_INFO_INPUT |
+		SNDRV_RAWMIDI_INFO_DUPLEX;
+
+	return 0;
+}
+
+
+static void madifx_midi_tasklet(unsigned long arg)
+{
+	struct mfx *mfx = (struct mfx *)arg;
+	int i = 0;
+
+	while (i < mfx->midiPorts) {
+		if (mfx->midi[i].pending)
+			snd_madifx_midi_input_read(&mfx->midi[i]);
+
+		i++;
+	}
+}
+
+
+/*-----------------------------------------------------------------------------
+  Status Interface
+  ----------------------------------------------------------------------------*/
+
+/* get the system sample rate which is set */
+
+
+/*
+ * Calculate the real sample rate from the
+ * current DDS value.
+ */
+static int madifx_get_system_sample_rate(struct mfx *mfx)
+{
+	unsigned int period, rate;
+
+	period = madifx_read(mfx, MADIFX_RD_PLL_FREQ);
+	rate = madifx_calc_dds_value(mfx, period) *
+		madifx_speed_multiplier(mfx);
+
+	return rate;
+}
+
+
+#define HDSPM_SYSTEM_SAMPLE_RATE(xname, xindex) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+	.name = xname, \
+	.index = xindex, \
+	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |\
+		SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
+	.info = snd_madifx_info_system_sample_rate, \
+	.put = snd_madifx_put_system_sample_rate, \
+	.get = snd_madifx_get_system_sample_rate \
+}
+
+static int snd_madifx_info_system_sample_rate(struct snd_kcontrol *kcontrol,
+					      struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 27000;
+	uinfo->value.integer.max = 207000;
+	uinfo->value.integer.step = 1;
+	return 0;
+}
+
+
+static int snd_madifx_get_system_sample_rate(struct snd_kcontrol *kcontrol,
+					     struct snd_ctl_elem_value *
+					     ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+
+	ucontrol->value.integer.value[0] = madifx_get_system_sample_rate(mfx);
+	return 0;
+}
+
+static int snd_madifx_put_system_sample_rate(struct snd_kcontrol *kcontrol,
+					     struct snd_ctl_elem_value *
+					     ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+
+	madifx_set_dds_value(mfx, ucontrol->value.enumerated.item[0]);
+	return 0;
+}
+
+
+
+static int madifx_external_freq_index(struct mfx *mfx,
+				      enum madifx_syncsource port)
+{
+	int i = 0;
+	int freq0_bit;
+	int inp_freq;
+	int lock_bit;
+	int inp_status;
+
+	inp_status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
+	inp_freq = madifx_read(mfx, MADIFX_RD_INP_FREQ);
+
+	switch (port) {
+	case syncsource_madi1:
+		lock_bit = MADIFX_madi1_lock;
+		freq0_bit = MADIFX_madi1_freq0;
+		break;
+	case syncsource_madi2:
+		lock_bit = MADIFX_madi2_lock;
+		freq0_bit = MADIFX_madi2_freq0;
+		break;
+	case syncsource_madi3:
+		lock_bit = MADIFX_madi3_lock;
+		freq0_bit = MADIFX_madi3_freq0;
+		break;
+	case syncsource_aes:
+		lock_bit = MADIFX_aes_lock;
+		freq0_bit = MADIFX_aes_freq0;
+		break;
+	case syncsource_wc:
+		lock_bit = MADIFX_word_lock;
+		freq0_bit = MADIFX_word_freq0;
+		break;
+	case syncsource_syncin:
+		lock_bit = MADIFX_sync_in_lock;
+		freq0_bit = MADIFX_sync_in_freq0;
+		break;
+	default:
+		dev_err(mfx->card->dev,
+				"MADIFX: Unknown external port ID %i\n", port);
+		return 0;
+	}
+
+	if (!(inp_status & lock_bit)) {
+		i = 0;
+	} else {
+		int freq_bits = inp_freq & (freq0_bit*15);
+
+		if      (freq_bits == freq0_bit * 1)
+			i = 1;
+		else if (freq_bits == freq0_bit * 2)
+			i = 2;
+		else if (freq_bits == freq0_bit * 3)
+			i = 3;
+		else if (freq_bits == freq0_bit * 4)
+			i = 4;
+		else if (freq_bits == freq0_bit * 5)
+			i = 5;
+		else if (freq_bits == freq0_bit * 6)
+			i = 6;
+		else if (freq_bits == freq0_bit * 7)
+			i = 7;
+		else if (freq_bits == freq0_bit * 8)
+			i = 8;
+		else if (freq_bits == freq0_bit * 9)
+			i = 9;
+		else
+			i = 0;
+	}
+	return i;
+}
+
+
+#define ENUMERATED_CTL_INFO(info, texts) \
+	snd_ctl_enum_info(info, 1, ARRAY_SIZE(texts), texts)
+
+#define HDSPM_AUTOSYNC_SAMPLE_RATE(xname, xindex) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+	.name = xname, \
+	.private_value = xindex, \
+	.access = SNDRV_CTL_ELEM_ACCESS_READ, \
+	.info = snd_madifx_info_autosync_sample_rate, \
+	.get = snd_madifx_get_autosync_sample_rate \
+}
+
+
+static int snd_madifx_info_autosync_sample_rate(struct snd_kcontrol *kcontrol,
+					       struct snd_ctl_elem_info *uinfo)
+{
+	ENUMERATED_CTL_INFO(uinfo, texts_freq);
+
+	return 0;
+}
+
+
+static int snd_madifx_get_autosync_sample_rate(struct snd_kcontrol *kcontrol,
+					      struct snd_ctl_elem_value *
+					      ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+
+	switch (mfx->io_type) {
+	case MADIFX:
+		ucontrol->value.enumerated.item[0] =
+			madifx_external_freq_index(mfx,
+						   kcontrol->private_value);
+		break;
+
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+#define MADIFX_MADI_CHANNELCOUNT(xname, xindex) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+	.name = xname, \
+	.private_value = xindex, \
+	.access = SNDRV_CTL_ELEM_ACCESS_READ, \
+	.info = snd_madifx_info_channelcount, \
+	.get = snd_madifx_get_channelcount \
+}
+
+
+static int snd_madifx_info_channelcount(struct snd_kcontrol *kcontrol,
+					       struct snd_ctl_elem_info *uinfo)
+{
+	static const char *const texts[] = { "64", "56", "32", "28", "16",
+		"14", "No lock" };
+
+	ENUMERATED_CTL_INFO(uinfo, texts);
+	return 0;
+}
+
+static int madifx_get_madichannelcount(struct mfx *mfx, int idx)
+{
+	int rate_index;
+	int i = 0;
+	int inp_status;
+	int rx_64ch_bit = (MADIFX_madi1_rx_64ch << idx);
+
+	inp_status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
+
+
+	/* Check for speed. If rate_index is zero, there's no lock */
+	rate_index = madifx_external_freq_index(mfx, idx);
+	if (0 == rate_index)
+		i = 6;
+	else {
+		if (inp_status & rx_64ch_bit)
+			i = 0;
+		else
+			i = 1;
+
+		/* I know this is ugly */
+		if (rate_index > 3)
+			i += 2; /* Double speed */
+		if (rate_index > 6)
+			i += 2; /* Quad speed */
+	}
+
+	return i;
+
+}
+
+
+static int snd_madifx_get_channelcount(struct snd_kcontrol *kcontrol,
+					      struct snd_ctl_elem_value *
+					      ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+	int idx = kcontrol->private_value;
+
+
+	ucontrol->value.enumerated.item[0] =
+		madifx_get_madichannelcount(mfx, idx);
+
+	return 0;
+}
+
+
+
+/*
+ * Returns the system clock mode for the given card.
+ * @returns 0 - master, 1 - slave
+ */
+static int madifx_system_clock_mode(struct mfx *mfx)
+{
+	u32 status;
+
+	status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
+	if ((status & (MADIFX_SelSyncRef0 * 7)) == (MADIFX_SelSyncRef0 * 7))
+		return 0;
+
+	return 1;
+}
+
+
+#define HDSPM_INTERNAL_CLOCK(xname, xindex) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+	.name = xname, \
+	.index = xindex, \
+	.info = snd_madifx_info_clock_source, \
+	.get = snd_madifx_get_clock_source, \
+	.put = snd_madifx_put_clock_source \
+}
+
+
+static int madifx_clock_source(struct mfx *mfx)
+{
+	switch (mfx->system_sample_rate) {
+	case 32000: return 0;
+	case 44100: return 1;
+	case 48000: return 2;
+	case 64000: return 3;
+	case 88200: return 4;
+	case 96000: return 5;
+	case 128000: return 6;
+	case 176400: return 7;
+	case 192000: return 8;
+	}
+
+	return -1;
+}
+
+static int madifx_set_clock_source(struct mfx *mfx, int mode)
+{
+	int rate;
+
+	switch (mode) {
+	case 0:
+		rate = 32000; break;
+	case 1:
+		rate = 44100; break;
+	case 2:
+		rate = 48000; break;
+	case 3:
+		rate = 64000; break;
+	case 4:
+		rate = 88200; break;
+	case 5:
+		rate = 96000; break;
+	case 6:
+		rate = 128000; break;
+	case 7:
+		rate = 176400; break;
+	case 8:
+		rate = 192000; break;
+	default:
+		rate = 48000;
+	}
+	madifx_set_rate(mfx, rate, 1);
+	return 0;
+}
+
+static int snd_madifx_info_clock_source(struct snd_kcontrol *kcontrol,
+				       struct snd_ctl_elem_info *uinfo)
+{
+	return snd_ctl_enum_info(uinfo, 1, 9, texts_freq + 1);
+}
+
+static int snd_madifx_get_clock_source(struct snd_kcontrol *kcontrol,
+				      struct snd_ctl_elem_value *ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+
+	ucontrol->value.enumerated.item[0] = madifx_clock_source(mfx);
+	return 0;
+}
+
+static int snd_madifx_put_clock_source(struct snd_kcontrol *kcontrol,
+				      struct snd_ctl_elem_value *ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+	int change;
+	int val;
+
+	if (!snd_madifx_use_is_exclusive(mfx))
+		return -EBUSY;
+	val = ucontrol->value.enumerated.item[0];
+	if (val < 0)
+		val = 0;
+	if (val > 9)
+		val = 9;
+	spin_lock_irq(&mfx->lock);
+	if (val != madifx_clock_source(mfx))
+		change = (madifx_set_clock_source(mfx, val) == 0) ? 1 : 0;
+	else
+		change = 0;
+	spin_unlock_irq(&mfx->lock);
+	return change;
+}
+
+
+static int madifx_get_clock_select(struct mfx *mfx)
+{
+	switch (mfx->io_type) {
+	case MADIFX:
+		{
+			int i;
+			u32 status;
+
+			status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
+
+			switch (status & (MADIFX_SelSyncRef0 * 7)) {
+			case MADIFX_SelSyncRef0 * 0:
+				i = 0; break;
+			case MADIFX_SelSyncRef0 * 1:
+				i = 1; break;
+			case MADIFX_SelSyncRef0 * 2:
+				i = 2; break;
+			case MADIFX_SelSyncRef0 * 3:
+				i = 3; break;
+			case MADIFX_SelSyncRef0 * 4:
+				i = 4; break;
+			case MADIFX_SelSyncRef0 * 5:
+				i = 5; break;
+			case MADIFX_SelSyncRef0 * 6:
+				i = 6; break;
+			default:
+						     /* We are master */
+						     i = 0;
+						     break;
+			}
+			return i;
+		}
+		break;
+	default:
+		break;
+	}
+
+	return -1;
+}
+
+static int madifx_set_clock_select(struct mfx *mfx, int val)
+{
+	mfx->settings_register &= ~MADIFX_SyncRefMask;
+	mfx->settings_register |= MADIFX_SyncRef0 * val;
+	madifx_write(mfx, MADIFX_SETTINGS_REG, mfx->settings_register);
+
+	if (val > 0) {
+		/* switched to slave mode */
+		mfx->system_sample_rate = madifx_get_external_rate(mfx);
+	}
+
+	return 0;
+}
+
+
+
+#define MADIFX_CLOCK_SELECT(xname, xindex) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+	.name = xname, \
+	.index = xindex, \
+	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |\
+			SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
+	.info = snd_madifx_info_clock_select, \
+	.get = snd_madifx_get_clock_select, \
+	.put = snd_madifx_put_clock_select \
+}
+
+
+static int snd_madifx_info_clock_select(struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_info *uinfo)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+
+	snd_ctl_enum_info(uinfo, 1, mfx->texts_clocksource_items,
+			mfx->texts_clocksource);
+
+	return 0;
+}
+
+static int snd_madifx_get_clock_select(struct snd_kcontrol *kcontrol,
+				       struct snd_ctl_elem_value *ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+	int psf = madifx_get_clock_select(mfx);
+
+	if (psf >= 0) {
+		ucontrol->value.enumerated.item[0] = psf;
+		return 0;
+	}
+
+	return -1;
+}
+
+static int snd_madifx_put_clock_select(struct snd_kcontrol *kcontrol,
+				       struct snd_ctl_elem_value *ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+	int val, change = 0;
+
+	if (!snd_madifx_use_is_exclusive(mfx))
+		return -EBUSY;
+
+	val = ucontrol->value.enumerated.item[0];
+
+	if (val < 0)
+		val = 0;
+	else if (val >= mfx->texts_clocksource_items)
+		val = mfx->texts_clocksource_items-1;
+
+	spin_lock_irq(&mfx->lock);
+	if (val != madifx_get_clock_select(mfx))
+		change = (0 == madifx_set_clock_select(mfx, val)) ? 1 : 0;
+
+	spin_unlock_irq(&mfx->lock);
+	return change;
+}
+
+
+
+#define MADIFX_TOGGLE_SETTING(xname, xindex) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+	.name = xname, \
+	.private_value = xindex, \
+	.info = snd_madifx_info_toggle_setting, \
+	.get = snd_madifx_get_toggle_setting, \
+	.put = snd_madifx_put_toggle_setting \
+}
+
+static int madifx_read_toggle_setting(struct mfx *mfx, u32 reg)
+{
+	return (mfx->settings_register & (reg)) ? 1 : 0;
+}
+
+static int madifx_set_toggle_setting(struct mfx *mfx, u32 reg, int out)
+{
+	if (out)
+		mfx->settings_register |= (reg);
+	else
+		mfx->settings_register &= ~(reg);
+	madifx_write(mfx, MADIFX_SETTINGS_REG, mfx->settings_register);
+
+	return 0;
+}
+
+#define snd_madifx_info_toggle_setting		snd_ctl_boolean_mono_info
+
+static int snd_madifx_get_toggle_setting(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+
+	spin_lock_irq(&mfx->lock);
+	ucontrol->value.integer.value[0] = madifx_read_toggle_setting(mfx,
+			kcontrol->private_value);
+	spin_unlock_irq(&mfx->lock);
+	return 0;
+}
+
+static int snd_madifx_put_toggle_setting(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+	int change;
+	u32 reg = kcontrol->private_value;
+	unsigned int val;
+
+	if (!snd_madifx_use_is_exclusive(mfx))
+		return -EBUSY;
+	val = ucontrol->value.integer.value[0] & 1;
+	spin_lock_irq(&mfx->lock);
+	change = (int) val != madifx_read_toggle_setting(mfx, reg);
+	madifx_set_toggle_setting(mfx, reg, val);
+	spin_unlock_irq(&mfx->lock);
+	return change;
+}
+
+
+
+#define HDSPM_MIXER(xname, xindex) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_HWDEP, \
+	.name = xname, \
+	.index = xindex, \
+	.device = 0, \
+	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | \
+		SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
+	.info = snd_madifx_info_mixer, \
+	.get = snd_madifx_get_mixer, \
+	.put = snd_madifx_put_mixer \
+}
+
+#define HDSPM_SYNC_CHECK(xname, xindex) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+	.name = xname, \
+	.private_value = xindex, \
+	.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
+	.info = snd_madifx_info_sync_check, \
+	.get = snd_madifx_get_sync_check \
+}
+
+
+static int snd_madifx_info_sync_check(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_info *uinfo)
+{
+	static const char *const texts[] = { "No Lock", "Lock", "Sync", "N/A" };
+
+	ENUMERATED_CTL_INFO(uinfo, texts);
+	return 0;
+}
+
+
+static int madifx_sync_check(struct mfx *mfx, enum madifx_syncsource idx)
+{
+	u32 status, lockmask, syncmask;
+	int lock, sync;
+
+	status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
+
+	switch (idx) {
+	case syncsource_syncin:
+		/* Sync-In */
+		lockmask = MADIFX_sync_in_lock;
+		syncmask = MADIFX_sync_in_sync;
+		break;
+	case syncsource_aes:
+		/* AES */
+		lockmask = MADIFX_aes_lock;
+		syncmask = MADIFX_aes_sync;
+		break;
+	case syncsource_wc:
+		/* WC */
+		lockmask = MADIFX_word_lock;
+		syncmask = MADIFX_word_sync;
+		break;
+	default:
+		lockmask = (MADIFX_madi1_lock << idx);
+		syncmask = (MADIFX_madi1_sync << idx);
+		break;
+	}
+
+	lock = (status & lockmask) ? 1 : 0;
+	sync = (status & syncmask) ? 1 : 0;
+
+	if (lock && sync)
+		return 2;
+	else if (lock)
+		return 1;
+	return 0;
+}
+
+
+
+
+static int snd_madifx_get_sync_check(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_value *ucontrol)
+{
+	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
+	int val = -1;
+
+	switch (mfx->io_type) {
+	case MADIFX:
+		val = madifx_sync_check(mfx, kcontrol->private_value);
+		break;
+	}
+
+	if (-1 == val)
+		val = 3;
+
+	ucontrol->value.enumerated.item[0] = val;
+	return 0;
+}
+
+
+
+static struct snd_kcontrol_new snd_madifx_controls_madi[] = {
+	HDSPM_SYSTEM_SAMPLE_RATE("System Sample Rate", 0),
+	HDSPM_INTERNAL_CLOCK("Internal Clock", 0),
+	HDSPM_SYNC_CHECK("MADI 1 SyncCheck", syncsource_madi1),
+	HDSPM_SYNC_CHECK("MADI 2 SyncCheck", syncsource_madi2),
+	HDSPM_SYNC_CHECK("MADI 3 SyncCheck", syncsource_madi3),
+	HDSPM_SYNC_CHECK("WC SyncCheck", syncsource_wc),
+	HDSPM_SYNC_CHECK("AES SyncCheck", syncsource_aes),
+	HDSPM_SYNC_CHECK("Sync-In SyncCheck", syncsource_syncin),
+	HDSPM_AUTOSYNC_SAMPLE_RATE("MADI 1 Frequency", syncsource_madi1),
+	HDSPM_AUTOSYNC_SAMPLE_RATE("MADI 2 Frequency", syncsource_madi2),
+	HDSPM_AUTOSYNC_SAMPLE_RATE("MADI 3 Frequency", syncsource_madi3),
+	HDSPM_AUTOSYNC_SAMPLE_RATE("WC Frequency", syncsource_wc),
+	HDSPM_AUTOSYNC_SAMPLE_RATE("AES Frequency", syncsource_aes),
+	HDSPM_AUTOSYNC_SAMPLE_RATE("Sync-In Frequency", syncsource_syncin),
+	MADIFX_MADI_CHANNELCOUNT("MADI 1 RX #ch", 0),
+	MADIFX_MADI_CHANNELCOUNT("MADI 2 RX #ch", 1),
+	MADIFX_MADI_CHANNELCOUNT("MADI 3 RX #ch", 2),
+	MADIFX_TOGGLE_SETTING("MADI 1 TX 64ch mode", MADIFX_madi1_tx_64ch),
+	MADIFX_TOGGLE_SETTING("MADI 2 TX 64ch mode", MADIFX_madi2_tx_64ch),
+	MADIFX_TOGGLE_SETTING("MADI 3 TX 64ch mode", MADIFX_madi3_tx_64ch),
+	MADIFX_TOGGLE_SETTING("MADI 1 SMUX mode", MADIFX_madi1_smux),
+	MADIFX_TOGGLE_SETTING("MADI 2 SMUX mode", MADIFX_madi2_smux),
+	MADIFX_TOGGLE_SETTING("MADI 3 SMUX mode", MADIFX_madi3_smux),
+	MADIFX_TOGGLE_SETTING("WC Term", MADIFX_WCK_TERM),
+	MADIFX_TOGGLE_SETTING("WC single speed", MADIFX_WCK48),
+	MADIFX_TOGGLE_SETTING("AES professional", MADIFX_PRO),
+	MADIFX_TOGGLE_SETTING("Redundancy mode", MADIFX_redundancy_mode),
+	MADIFX_TOGGLE_SETTING("Mirror MADI out", MADIFX_mirror_madi_out),
+	MADIFX_CLOCK_SELECT("Clock Selection", 0)
+};
+
+
+static int snd_madifx_create_controls(struct snd_card *card,
+					struct mfx *mfx)
+{
+	unsigned int idx, limit;
+	int err;
+	struct snd_kcontrol_new *list = NULL;
+
+	switch (mfx->io_type) {
+	case MADIFX:
+		list = snd_madifx_controls_madi;
+		limit = ARRAY_SIZE(snd_madifx_controls_madi);
+		break;
+	}
+
+	if (NULL != list) {
+		for (idx = 0; idx < limit; idx++) {
+			err = snd_ctl_add(card,
+					snd_ctl_new1(&list[idx], mfx));
+			if (err < 0)
+				return err;
+		}
+	}
+
+	/* FIXME: If there'll ever be an ALSA mixer for MADIFX, you want to
+	 * create the corresponding controls here.
+	 */
+	return 0;
+}
+
+/*------------------------------------------------------------
+   /proc interface
+ ------------------------------------------------------------*/
+
+static void
+snd_madifx_proc_read_madifx(struct snd_info_entry *entry,
+			 struct snd_info_buffer *buffer)
+{
+	struct mfx *mfx = entry->private_data;
+	u32 status, inp_status, control, freq;
+
+	char *system_clock_mode;
+	int x;
+
+	unsigned int period;
+	u64 freq_const = 0;
+	u32 rate;
+
+	status = madifx_read(mfx, MADIFX_RD_STATUS);
+	inp_status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
+	control = mfx->control_register;
+	freq = madifx_read(mfx, MADIFX_RD_INP_FREQ);
+
+#if 0
+	snd_iprintf(buffer, "%s (Card #%d) Rev.%x Status2first3bits: %x\n",
+			mfx->card_name, mfx->card->number + 1,
+			mfx->firmware_rev,
+			(status2 & HDSPM_version0) |
+			(status2 & HDSPM_version1) | (status2 &
+				HDSPM_version2));
+#endif
+	snd_iprintf(buffer, "HW Serial: 0x%x\n", madifx_read(mfx,
+				MADIFX_RD_VERSION));
+
+	snd_iprintf(buffer, "IRQ: %d Registers bus: 0x%lx VM: 0x%lx\n",
+			mfx->irq, mfx->port, (unsigned long)mfx->iobase);
+
+	snd_iprintf(buffer, "--- System ---\n");
+
+	snd_iprintf(buffer,
+		"IRQ Pending: Audio=%d, MIDI0=%d, MIDI1=%d, MIDI2=%d MIDI3=%d IRQcount=%d\n",
+		status & HDSPM_audioIRQPending,
+		(status & MADIFX_mIRQ0) ? 1 : 0,
+		(status & MADIFX_mIRQ1) ? 1 : 0,
+		(status & MADIFX_mIRQ2) ? 1 : 0,
+		(status & MADIFX_mIRQ3) ? 1 : 0,
+		mfx->irq_count);
+
+	snd_iprintf(buffer,
+		"MIDI FIFO: Out0=0x%x, Out1=0x%x, Out2=0x%x, Out3=0x%x\n",
+		madifx_read(mfx, MADIFX_midi_out0_status) & 0xFF,
+		madifx_read(mfx, MADIFX_midi_out1_status) & 0xFF,
+		madifx_read(mfx, MADIFX_midi_out2_status) & 0xFF,
+		madifx_read(mfx, MADIFX_midi_out3_status) & 0xFF);
+	snd_iprintf(buffer,
+		"MIDI FIFO: in0=0x%x, in1=0x%x, in2=0x%x, in3=0x%x\n",
+		madifx_read(mfx, MADIFX_midi_in0_status) & 0xFF,
+		madifx_read(mfx, MADIFX_midi_in1_status) & 0xFF,
+		madifx_read(mfx, MADIFX_midi_in2_status) & 0xFF,
+		madifx_read(mfx, MADIFX_midi_in3_status) & 0xFF);
+	snd_iprintf(buffer,
+		"Register:\ncontrol=0x%x, settings=0x%x, status=0x%x, input=0x%x inp_freq=0x%x\n",
+		mfx->control_register, mfx->settings_register,
+		status, inp_status, freq);
+
+		switch (mfx->io_type) {
+		case MADIFX:
+			freq_const = 131072000000000ULL;
+			break;
+		}
+
+		period = madifx_read(mfx, MADIFX_RD_PLL_FREQ);
+		snd_iprintf(buffer, "    period: %u\n", period);
+
+
+		/* rate = freq_const/period; */
+		rate = div_u64(freq_const, period);
+
+		rate *= madifx_speed_multiplier(mfx);
+
+
+		snd_iprintf(buffer, "  Frequency: %u Hz\n",
+				(unsigned int) rate);
+
+
+	snd_iprintf(buffer, "--- Settings ---\n");
+
+	x = madifx_get_latency(mfx);
+
+	snd_iprintf(buffer,
+		"Size (Latency): %d samples\n", x);
+
+	if (1 == madifx_system_clock_mode(mfx))
+		system_clock_mode = "Slave";
+	else
+		system_clock_mode = "Master";
+	snd_iprintf(buffer, "AutoSync Reference: %s\n", system_clock_mode);
+
+	snd_iprintf(buffer, "Selected clock source: %s\n",
+		mfx->texts_clocksource[madifx_get_clock_select(mfx)]);
+
+	snd_iprintf(buffer, "System Clock Frequency: %d\n",
+			mfx->system_sample_rate);
+
+	snd_iprintf(buffer, "\n");
+}
+
+
+#ifdef CONFIG_SND_DEBUG
+static void
+snd_madifx_proc_read_debug(struct snd_info_entry *entry,
+			  struct snd_info_buffer *buffer)
+{
+	struct mfx *mfx = entry->private_data;
+
+	int j, i;
+
+	for (i = 0; i < 256 /* 1024*64 */; i += j) {
+		snd_iprintf(buffer, "0x%08X: ", i);
+		for (j = 0; j < 16; j += 4)
+			snd_iprintf(buffer, "%08X ", madifx_read(mfx, i + j));
+		snd_iprintf(buffer, "\n");
+	}
+}
+#endif
+
+
+#if 0
+/* FIXME: Portnames not implemented, yet. mfx->port_names_in and _out are
+ * set to NULL, so don't derefence them for the time being.
+ */
+static void snd_madifx_proc_ports_in(struct snd_info_entry *entry,
+			  struct snd_info_buffer *buffer)
+{
+	struct mfx *mfx = entry->private_data;
+	int i;
+
+	snd_iprintf(buffer, "# generated by mfx\n");
+
+	for (i = 0; i < mfx->max_channels_in; i++)
+		snd_iprintf(buffer, "%d=%s\n", i+1, mfx->port_names_in[i]);
+}
+
+static void snd_madifx_proc_ports_out(struct snd_info_entry *entry,
+			  struct snd_info_buffer *buffer)
+{
+	struct mfx *mfx = entry->private_data;
+	int i;
+
+	snd_iprintf(buffer, "# generated by mfx\n");
+
+	for (i = 0; i < mfx->max_channels_out; i++)
+		snd_iprintf(buffer, "%d=%s\n", i+1, mfx->port_names_out[i]);
+}
+#endif
+
+
+static void snd_madifx_proc_init(struct mfx *mfx)
+{
+	struct snd_info_entry *entry;
+
+	if (!snd_card_proc_new(mfx->card, "madifx", &entry)) {
+		switch (mfx->io_type) {
+		case MADIFX:
+			snd_info_set_text_ops(entry, mfx,
+					snd_madifx_proc_read_madifx);
+			break;
+		}
+	}
+
+#if 0
+	/* FIXME: port names still missing for MADIFX */
+	if (!snd_card_proc_new(mfx->card, "ports.in", &entry))
+		snd_info_set_text_ops(entry, mfx, snd_madifx_proc_ports_in);
+
+	if (!snd_card_proc_new(mfx->card, "ports.out", &entry))
+		snd_info_set_text_ops(entry, mfx, snd_madifx_proc_ports_out);
+#endif
+
+#ifdef CONFIG_SND_DEBUG
+	/* debug file to read all mfx registers */
+	if (!snd_card_proc_new(mfx->card, "debug", &entry))
+		snd_info_set_text_ops(entry, mfx,
+				snd_madifx_proc_read_debug);
+#endif
+}
+
+/*------------------------------------------------------------
+   mfx intitialize
+ ------------------------------------------------------------*/
+
+static int snd_madifx_set_defaults(struct mfx *mfx)
+{
+	/* ASSUMPTION: mfx->lock is either held, or there is no need to
+	   hold it (e.g. during module initialization).
+	   */
+
+	/* set defaults:       */
+
+	mfx->settings_register = 0;
+
+	switch (mfx->io_type) {
+	case MADIFX:
+		/* OSX: LAT_3+BUF_SIZ_1+BUF_SIZ_2+freq1; */
+		mfx->control_register = MADIFX_LAT_3 + MADIFX_BUF_SIZ_1 +
+			MADIFX_BUF_SIZ_2 + MADIFX_freq1;
+		/* PRO+madi1_tx_64ch+madi2_tx_64ch+madi3_tx_64ch; */
+		mfx->settings_register = 0x8 + 0x80 + 0x100 + 0x200;
+		break;
+	}
+
+	madifx_write(mfx, MADIFX_CONTROL_REG, mfx->control_register);
+
+	madifx_compute_period_size(mfx);
+
+	madifx_write(mfx, MADIFX_SETTINGS_REG, mfx->settings_register);
+
+	/* set a default rate so that the channel map is set up. */
+	madifx_set_rate(mfx, 48000, 1);
+
+	return 0;
+}
+
+
+/*------------------------------------------------------------
+   interrupt
+ ------------------------------------------------------------*/
+
+static irqreturn_t snd_madifx_interrupt(int irq, void *dev_id)
+{
+	struct mfx *mfx = (struct mfx *) dev_id;
+	unsigned int status;
+	int i, audio, midi, schedule = 0;
+	/* cycles_t now; */
+
+	status = madifx_read(mfx, MADIFX_RD_STATUS);
+
+	audio = status & HDSPM_audioIRQPending;
+	midi = status & (MADIFX_mIRQ0 | MADIFX_mIRQ1 |
+			MADIFX_mIRQ2 | MADIFX_mIRQ3);
+
+	/* now = get_cycles(); */
+	/*
+	 *   LAT_2..LAT_0 period  counter (win)  counter (mac)
+	 *          6       4096   ~256053425     ~514672358
+	 *          5       2048   ~128024983     ~257373821
+	 *          4       1024    ~64023706     ~128718089
+	 *          3        512    ~32005945      ~64385999
+	 *          2        256    ~16003039      ~32260176
+	 *          1        128     ~7998738      ~16194507
+	 *          0         64     ~3998231       ~8191558
+	 */
+	/*
+	   snd_printk(KERN_INFO "snd_madifx_interrupt %llu @ %llx\n",
+	   now-mfx->last_interrupt, status & 0xFFC0);
+	   mfx->last_interrupt = now;
+	*/
+
+	if (!audio && !midi)
+		return IRQ_NONE;
+
+	madifx_write(mfx, MADIFX_IRQ_ACK, 0);
+	mfx->irq_count++;
+
+
+	if (audio) {
+		if (mfx->capture_substream)
+			snd_pcm_period_elapsed(mfx->capture_substream);
+
+		if (mfx->playback_substream)
+			snd_pcm_period_elapsed(mfx->playback_substream);
+	}
+
+	if (midi) {
+		i = 0;
+		while (i < mfx->midiPorts) {
+			if ((madifx_read(mfx,
+				mfx->midi[i].statusIn) & 0xff) &&
+					(status & mfx->midi[i].irq)) {
+				/* we disable interrupts for this input until
+				 * processing is done
+				 */
+				mfx->control_register &= ~mfx->midi[i].ie;
+				madifx_write(mfx, MADIFX_CONTROL_REG,
+						mfx->control_register);
+				mfx->midi[i].pending = 1;
+				schedule = 1;
+			}
+
+			i++;
+		}
+
+		if (schedule)
+			tasklet_hi_schedule(&mfx->midi_tasklet);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/*------------------------------------------------------------
+   pcm interface
+  ------------------------------------------------------------*/
+
+
+static snd_pcm_uframes_t snd_madifx_hw_pointer(struct snd_pcm_substream
+					      *substream)
+{
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+
+	return madifx_hw_pointer(mfx);
+}
+
+
+static int snd_madifx_reset(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+	struct snd_pcm_substream *other;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		other = mfx->capture_substream;
+	else
+		other = mfx->playback_substream;
+
+	if (mfx->running)
+		runtime->status->hw_ptr = madifx_hw_pointer(mfx);
+	else
+		runtime->status->hw_ptr = 0;
+	if (other) {
+		struct snd_pcm_substream *s;
+		struct snd_pcm_runtime *oruntime = other->runtime;
+
+		snd_pcm_group_for_each_entry(s, substream) {
+			if (s == other) {
+				oruntime->status->hw_ptr =
+					runtime->status->hw_ptr;
+				break;
+			}
+		}
+	}
+	return 0;
+}
+
+static int snd_madifx_hw_params(struct snd_pcm_substream *substream,
+			       struct snd_pcm_hw_params *params)
+{
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+	int err;
+	int i;
+	pid_t this_pid;
+	pid_t other_pid;
+
+	spin_lock_irq(&mfx->lock);
+
+	if (substream->pstr->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		this_pid = mfx->playback_pid;
+		other_pid = mfx->capture_pid;
+	} else {
+		this_pid = mfx->capture_pid;
+		other_pid = mfx->playback_pid;
+	}
+
+	if (other_pid > 0 && this_pid != other_pid) {
+
+		/* The other stream is open, and not by the same
+		   task as this one. Make sure that the parameters
+		   that matter are the same.
+		   */
+
+		if (params_rate(params) != mfx->system_sample_rate) {
+			spin_unlock_irq(&mfx->lock);
+			_snd_pcm_hw_param_setempty(params,
+					SNDRV_PCM_HW_PARAM_RATE);
+			return -EBUSY;
+		}
+
+		if (params_period_size(params) != mfx->period_bytes / 4) {
+			spin_unlock_irq(&mfx->lock);
+			_snd_pcm_hw_param_setempty(params,
+					SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
+			return -EBUSY;
+		}
+
+	}
+	/* We're fine. */
+	spin_unlock_irq(&mfx->lock);
+
+	/* how to make sure that the rate matches an externally-set one ?   */
+
+	spin_lock_irq(&mfx->lock);
+	err = madifx_set_rate(mfx, params_rate(params), 0);
+	if (err < 0) {
+		dev_info(mfx->card->dev, "err on madifx_set_rate: %d\n", err);
+		spin_unlock_irq(&mfx->lock);
+		_snd_pcm_hw_param_setempty(params,
+				SNDRV_PCM_HW_PARAM_RATE);
+		return err;
+	}
+	spin_unlock_irq(&mfx->lock);
+
+	err = madifx_set_interrupt_interval(mfx,
+			params_period_size(params));
+	if (err < 0) {
+		dev_info(mfx->card->dev,
+			"err on madifx_set_interrupt_interval: %d\n", err);
+		_snd_pcm_hw_param_setempty(params,
+				SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
+		return err;
+	}
+
+	/* Memory allocation */
+#define NUM_AES_PAGES (32768*2/4096)
+#define NUM_MADI_PAGES (32768*192/4096)
+#define NUM_DMA_CH_PAGES (32768*8/4096)
+#define MADIFX_HW_PAGE_SIZE 4096
+
+	{
+		int wanted;
+
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			wanted = OUTPUT_DMA_BUFFER_SIZE;
+		else
+			wanted = INPUT_DMA_BUFFER_SIZE;
+
+		err = snd_pcm_lib_malloc_pages(substream, wanted);
+		if (err < 0) {
+			dev_info(mfx->card->dev,
+			    "err on snd_pcm_lib_malloc_pages: %d\n", err);
+			return err;
+		}
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+
+		/* initialise default DMA table. Will be
+		 * overwritten in a second. */
+		for (i = 0; i < MADIFX_MAX_PAGE_TABLE_SIZE/2; i++)
+			mfx->dmaPageTable[i] =
+					snd_pcm_sgbuf_get_addr(substream, 0);
+
+		/* AES Out, stereo */
+		for (i = 0; i < NUM_AES_PAGES; i++)
+			mfx->dmaPageTable[i] =
+					snd_pcm_sgbuf_get_addr(substream,
+					i * MADIFX_HW_PAGE_SIZE);
+
+		/* Phones Out, stereo */
+		for (i = 0; i < NUM_AES_PAGES; i++)
+			mfx->dmaPageTable[i+1*NUM_DMA_CH_PAGES] =
+				snd_pcm_sgbuf_get_addr(substream,
+					(i+1*NUM_AES_PAGES) *
+					MADIFX_HW_PAGE_SIZE);
+
+		/* MADI Out, 192 channels */
+		for (i = 0; i < NUM_MADI_PAGES; i++)
+			mfx->dmaPageTable[i+2*NUM_DMA_CH_PAGES] =
+				snd_pcm_sgbuf_get_addr(substream,
+						(i+2*NUM_AES_PAGES) *
+						MADIFX_HW_PAGE_SIZE);
+
+		for (i = 0; i < MADIFX_MAX_PAGE_TABLE_SIZE/2; i++)
+			madifx_write(mfx, MADIFX_PAGE_ADDRESS_LIST + (4 * i),
+					mfx->dmaPageTable[i]);
+
+		for (i = 0; i < 32; ++i)
+			snd_madifx_enable_out(mfx, i, 1);
+
+		mfx->playback_buffer =
+			(unsigned char *) substream->runtime->dma_area;
+		snd_printdd("Allocated sample buffer for playback at %p\n",
+				mfx->playback_buffer);
+	} else {
+		/* initialise default DMA table. Will be
+		 * overwritten in a second. */
+		for (i = MADIFX_MAX_PAGE_TABLE_SIZE/2;
+				i < MADIFX_MAX_PAGE_TABLE_SIZE; i++) {
+			mfx->dmaPageTable[i] =
+					snd_pcm_sgbuf_get_addr(substream, 0);
+		}
+
+		/* setup DMA page table */
+		/* AES In, stereo */
+		for (i = 0; i < NUM_AES_PAGES; i++) {
+			mfx->dmaPageTable[i+MADIFX_MAX_PAGE_TABLE_SIZE/2] =
+				snd_pcm_sgbuf_get_addr(substream,
+						i * MADIFX_HW_PAGE_SIZE);
+		}
+
+		/* MADI In, 192 channels */
+		for (i = 0; i < NUM_MADI_PAGES; i++) {
+			mfx->dmaPageTable[i + MADIFX_MAX_PAGE_TABLE_SIZE / 2 + NUM_DMA_CH_PAGES] =
+				snd_pcm_sgbuf_get_addr(substream,
+					(i + NUM_AES_PAGES) * MADIFX_HW_PAGE_SIZE);
+		}
+
+		for (i = MADIFX_MAX_PAGE_TABLE_SIZE/2;
+				i < MADIFX_MAX_PAGE_TABLE_SIZE; i++) {
+			madifx_write(mfx, MADIFX_PAGE_ADDRESS_LIST + (4 * i),
+					mfx->dmaPageTable[i]);
+		}
+
+		for (i = 0; i < 32; ++i)
+			snd_madifx_enable_in(mfx, i, 1);
+
+		mfx->capture_buffer =
+			(unsigned char *) substream->runtime->dma_area;
+		snd_printdd("Allocated sample buffer for capture at %p\n",
+				mfx->capture_buffer);
+	}
+
+	/* Switch to native float format if requested */
+	if (SNDRV_PCM_FORMAT_FLOAT_LE == params_format(params)) {
+		if (!(mfx->control_register & MADIFX_float_format))
+			dev_info(mfx->card->dev,
+				"mfx: Switching to native 32bit LE float format.\n");
+
+		mfx->control_register |= MADIFX_float_format;
+	} else if (SNDRV_PCM_FORMAT_S32_LE == params_format(params)) {
+		if (mfx->control_register & MADIFX_float_format)
+			dev_info(mfx->card->dev,
+				"mfx: Switching to native 32bit LE integer format.\n");
+
+		mfx->control_register &= ~MADIFX_float_format;
+	}
+	madifx_write(mfx, MADIFX_CONTROL_REG, mfx->control_register);
+
+	return 0;
+}
+
+static int snd_madifx_hw_free(struct snd_pcm_substream *substream)
+{
+	int i;
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+
+		/* params_channels(params) should be enough,
+		   but to get sure in case of error */
+		for (i = 0; i < 32; ++i)
+			snd_madifx_enable_out(mfx, i, 0);
+
+		mfx->playback_buffer = NULL;
+	} else {
+		for (i = 0; i < 32; ++i)
+			snd_madifx_enable_in(mfx, i, 0);
+
+		mfx->capture_buffer = NULL;
+
+	}
+
+	snd_pcm_lib_free_pages(substream);
+
+	return 0;
+}
+
+
+static int snd_madifx_channel_info(struct snd_pcm_substream *substream,
+		struct snd_pcm_channel_info *info)
+{
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		int last_madi_channel = 193;
+
+		if (snd_BUG_ON(info->channel >= mfx->max_channels_out)) {
+			dev_info(mfx->card->dev,
+				"snd_madifx_channel_info: output channel out of range (%d)\n",
+				info->channel);
+			return -EINVAL;
+		}
+
+		switch (mfx->speedmode) {
+		case ss:
+		/* MADI FX Playback channel map
+	AES	   Outputstream 0 with 2 channels at byte offset 0
+	MADI	   Outputstream 1 with 8 channels at byte offset 131072
+		   Outputstream 2 with 8 channels at byte offset 393216
+		   Outputstream 3 with 8 channels at byte offset 655360
+		   Outputstream 4 with 8 channels at byte offset 917504
+		   Outputstream 5 with 8 channels at byte offset 1179648
+		   Outputstream 6 with 8 channels at byte offset 1441792
+		   Outputstream 7 with 8 channels at byte offset 1703936
+		   Outputstream 8 with 8 channels at byte offset 1966080
+		   Outputstream 9 with 8 channels at byte offset 2228224
+		   Outputstream 10 with 8 channels at byte offset 2490368
+		   Outputstream 11 with 8 channels at byte offset 2752512
+		   Outputstream 12 with 8 channels at byte offset 3014656
+		   Outputstream 13 with 8 channels at byte offset 3276800
+		   Outputstream 14 with 8 channels at byte offset 3538944
+		   Outputstream 15 with 8 channels at byte offset 3801088
+		   Outputstream 16 with 8 channels at byte offset 4063232
+		   Outputstream 17 with 8 channels at byte offset 4325376
+		   Outputstream 18 with 8 channels at byte offset 4587520
+		   Outputstream 19 with 8 channels at byte offset 4849664
+		   Outputstream 20 with 8 channels at byte offset 5111808
+		   Outputstream 21 with 8 channels at byte offset 5373952
+		   Outputstream 22 with 8 channels at byte offset 5636096
+		   Outputstream 23 with 8 channels at byte offset 5898240
+		   Outputstream 24 with 8 channels at byte offset 6160384
+	Phones	   Outputstream 25 with 2 channels at byte offset 65536
+		*/
+
+			/* Note: channels start at zero */
+			last_madi_channel = 193;
+			break;
+		case ds:
+			last_madi_channel = 97;
+			break;
+		case qs:
+			last_madi_channel = 49;
+			break;
+		}
+	info->offset = (info->channel < 2) ?
+	    0 : ((info->channel > last_madi_channel) ? 65536 :
+		    131072 + 8 * 4 * 8192 * ((info->channel-2)/8));
+	info->first = (info->channel < 2 || info->channel > last_madi_channel) ?
+	    32 * (info->channel % (last_madi_channel + 1)) :
+	    32 * ((info->channel-2) % 8);
+	info->step = (info->channel < 2 || info->channel > last_madi_channel) ?
+	    64 : 256;
+	} else {
+		if (snd_BUG_ON(info->channel >= mfx->max_channels_in)) {
+			dev_info(mfx->card->dev,
+				"snd_madifx_channel_info: input channel out of range (%d)\n",
+					info->channel);
+			return -EINVAL;
+		}
+
+		switch (mfx->speedmode) {
+		/* MADI FX Input channel map
+	AES	   Inputstream 0 with 2 channels at byte offset 0
+	MADI	   Inputstream 1 with 8 channels at byte offset 65536
+		   Inputstream 2 with 8 channels at byte offset 327680
+		   Inputstream 3 with 8 channels at byte offset 589824
+		   Inputstream 4 with 8 channels at byte offset 851968
+		   Inputstream 5 with 8 channels at byte offset 1114112
+		   Inputstream 6 with 8 channels at byte offset 1376256
+		   Inputstream 7 with 8 channels at byte offset 1638400
+		   Inputstream 8 with 8 channels at byte offset 1900544
+		   Inputstream 9 with 8 channels at byte offset 2162688
+		   Inputstream 10 with 8 channels at byte offset 2424832
+		   Inputstream 11 with 8 channels at byte offset 2686976
+		   Inputstream 12 with 8 channels at byte offset 2949120
+		   Inputstream 13 with 8 channels at byte offset 3211264
+		   Inputstream 14 with 8 channels at byte offset 3473408
+		   Inputstream 15 with 8 channels at byte offset 3735552
+		   Inputstream 16 with 8 channels at byte offset 3997696
+		   Inputstream 17 with 8 channels at byte offset 4259840
+		   Inputstream 18 with 8 channels at byte offset 4521984
+		   Inputstream 19 with 8 channels at byte offset 4784128
+		   Inputstream 20 with 8 channels at byte offset 5046272
+		   Inputstream 21 with 8 channels at byte offset 5308416
+		   Inputstream 22 with 8 channels at byte offset 5570560
+		   Inputstream 23 with 8 channels at byte offset 5832704
+		   Inputstream 24 with 8 channels at byte offset 6094848
+	       */
+		case ss:
+		case ds:
+		case qs:
+			info->offset = (info->channel < 2) ?
+				0 :
+				65536 + 8 * 4 * 8192 * ((info->channel-2)/8);
+			info->first = (info->channel < 2) ?
+				32 * info->channel :
+				32 * ((info->channel-2) % 8);
+			info->step = (info->channel < 2) ? 64 : 256;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+
+static int snd_madifx_ioctl(struct snd_pcm_substream *substream,
+		unsigned int cmd, void *arg)
+{
+	switch (cmd) {
+	case SNDRV_PCM_IOCTL1_RESET:
+		return snd_madifx_reset(substream);
+
+	case SNDRV_PCM_IOCTL1_CHANNEL_INFO:
+		{
+			struct snd_pcm_channel_info *info = arg;
+
+			return snd_madifx_channel_info(substream, info);
+		}
+	default:
+		break;
+	}
+
+	return snd_pcm_lib_ioctl(substream, cmd, arg);
+}
+
+static int snd_madifx_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+	struct snd_pcm_substream *other;
+	int running;
+
+	spin_lock(&mfx->lock);
+	running = mfx->running;
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		running |= 1 << substream->stream;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		running &= ~(1 << substream->stream);
+		break;
+	default:
+		snd_BUG();
+		spin_unlock(&mfx->lock);
+		return -EINVAL;
+	}
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		other = mfx->capture_substream;
+	else
+		other = mfx->playback_substream;
+
+	if (other) {
+		struct snd_pcm_substream *s;
+
+		snd_pcm_group_for_each_entry(s, substream) {
+			if (s == other) {
+				snd_pcm_trigger_done(s, substream);
+				if (cmd == SNDRV_PCM_TRIGGER_START)
+					running |= 1 << s->stream;
+				else
+					running &= ~(1 << s->stream);
+				goto _ok;
+			}
+		}
+		if (cmd == SNDRV_PCM_TRIGGER_START) {
+			if (!(running & (1 << SNDRV_PCM_STREAM_PLAYBACK))
+					&& substream->stream ==
+					SNDRV_PCM_STREAM_CAPTURE)
+				madifx_silence_playback(mfx);
+		} else {
+			if (running &&
+				substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+				madifx_silence_playback(mfx);
+		}
+	} else {
+		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+			madifx_silence_playback(mfx);
+	}
+_ok:
+	snd_pcm_trigger_done(substream, substream);
+	if (!mfx->running && running)
+		madifx_start_audio(mfx);
+	else if (mfx->running && !running)
+		madifx_stop_audio(mfx);
+	mfx->running = running;
+	spin_unlock(&mfx->lock);
+
+	return 0;
+}
+
+static int snd_madifx_prepare(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static struct snd_pcm_hardware snd_madifx_playback_subinfo = {
+	.info = (SNDRV_PCM_INFO_MMAP |
+		 SNDRV_PCM_INFO_MMAP_VALID |
+		 SNDRV_PCM_INFO_COMPLEX |
+		 SNDRV_PCM_INFO_SYNC_START),
+	.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_FLOAT_LE,
+	.rates = (SNDRV_PCM_RATE_32000 |
+		  SNDRV_PCM_RATE_44100 |
+		  SNDRV_PCM_RATE_48000 |
+		  SNDRV_PCM_RATE_64000 |
+		  SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
+		  SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000),
+	.rate_min = 32000,
+	.rate_max = 192000,
+	.channels_min = 1,
+	.channels_max = 196,
+	.buffer_bytes_max = OUTPUT_DMA_BUFFER_SIZE,
+	.period_bytes_min = (32 * 4),
+	.period_bytes_max = OUTPUT_DMA_BUFFER_SIZE,
+	.periods_min = 2,
+	.periods_max = 1024,
+	.fifo_size = 0
+};
+
+static struct snd_pcm_hardware snd_madifx_capture_subinfo = {
+	.info = (SNDRV_PCM_INFO_MMAP |
+		 SNDRV_PCM_INFO_MMAP_VALID |
+		 SNDRV_PCM_INFO_COMPLEX |
+		 SNDRV_PCM_INFO_SYNC_START),
+	.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_FLOAT_LE,
+	.rates = (SNDRV_PCM_RATE_32000 |
+		  SNDRV_PCM_RATE_44100 |
+		  SNDRV_PCM_RATE_48000 |
+		  SNDRV_PCM_RATE_64000 |
+		  SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
+		  SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000),
+	.rate_min = 32000,
+	.rate_max = 192000,
+	.channels_min = 1,
+	.channels_max = 194,
+	.buffer_bytes_max = INPUT_DMA_BUFFER_SIZE,
+	.period_bytes_min = (32 * 4),
+	.period_bytes_max = INPUT_DMA_BUFFER_SIZE,
+	.periods_min = 2,
+	.periods_max = 1024,
+	.fifo_size = 0
+};
+
+static int snd_madifx_hw_rule_in_channels_rate(struct snd_pcm_hw_params *params,
+					   struct snd_pcm_hw_rule *rule)
+{
+	struct mfx *mfx = rule->private;
+	struct snd_interval *c =
+	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	struct snd_interval *r =
+	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+
+	if (r->min > 96000 && r->max <= 192000) {
+		struct snd_interval t = {
+			.min = mfx->qs_in_channels,
+			.max = mfx->qs_in_channels,
+			.integer = 1,
+		};
+		return snd_interval_refine(c, &t);
+	} else if (r->min > 48000 && r->max <= 96000) {
+		struct snd_interval t = {
+			.min = mfx->ds_in_channels,
+			.max = mfx->ds_in_channels,
+			.integer = 1,
+		};
+		return snd_interval_refine(c, &t);
+	} else if (r->max < 64000) {
+		struct snd_interval t = {
+			.min = mfx->ss_in_channels,
+			.max = mfx->ss_in_channels,
+			.integer = 1,
+		};
+		return snd_interval_refine(c, &t);
+	}
+
+	return 0;
+}
+
+static int snd_madifx_hw_rule_out_channels_rate(struct snd_pcm_hw_params *
+						params,
+						struct snd_pcm_hw_rule *rule)
+{
+	struct mfx *mfx = rule->private;
+	struct snd_interval *c =
+	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	struct snd_interval *r =
+	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+
+	if (r->min > 96000 && r->max <= 192000) {
+		struct snd_interval t = {
+			.min = mfx->qs_out_channels,
+			.max = mfx->qs_out_channels,
+			.integer = 1,
+		};
+		return snd_interval_refine(c, &t);
+	} else if (r->min > 48000 && r->max <= 96000) {
+		struct snd_interval t = {
+			.min = mfx->ds_out_channels,
+			.max = mfx->ds_out_channels,
+			.integer = 1,
+		};
+		return snd_interval_refine(c, &t);
+	} else if (r->max < 64000) {
+		struct snd_interval t = {
+			.min = mfx->ss_out_channels,
+			.max = mfx->ss_out_channels,
+			.integer = 1,
+		};
+		return snd_interval_refine(c, &t);
+	}
+	return 0;
+}
+
+static int snd_madifx_hw_rule_rate_in_channels(struct snd_pcm_hw_params *params,
+					       struct snd_pcm_hw_rule *rule)
+{
+	struct mfx *mfx = rule->private;
+	struct snd_interval *c =
+	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	struct snd_interval *r =
+	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+
+	if (c->min >= mfx->ss_in_channels) {
+		struct snd_interval t = {
+			.min = 32000,
+			.max = 48000,
+			.integer = 1,
+		};
+		return snd_interval_refine(r, &t);
+	} else if (c->max <= mfx->qs_in_channels) {
+		struct snd_interval t = {
+			.min = 128000,
+			.max = 192000,
+			.integer = 1,
+		};
+		return snd_interval_refine(r, &t);
+	} else if (c->max <= mfx->ds_in_channels) {
+		struct snd_interval t = {
+			.min = 64000,
+			.max = 96000,
+			.integer = 1,
+		};
+		return snd_interval_refine(r, &t);
+	}
+
+	return 0;
+}
+static int snd_madifx_hw_rule_rate_out_channels(struct snd_pcm_hw_params *
+						params,
+						struct snd_pcm_hw_rule *rule)
+{
+	struct mfx *mfx = rule->private;
+	struct snd_interval *c =
+	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	struct snd_interval *r =
+	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+
+	if (c->min >= mfx->ss_out_channels) {
+		struct snd_interval t = {
+			.min = 32000,
+			.max = 48000,
+			.integer = 1,
+		};
+		return snd_interval_refine(r, &t);
+	} else if (c->max <= mfx->qs_out_channels) {
+		struct snd_interval t = {
+			.min = 128000,
+			.max = 192000,
+			.integer = 1,
+		};
+		return snd_interval_refine(r, &t);
+	} else if (c->max <= mfx->ds_out_channels) {
+		struct snd_interval t = {
+			.min = 64000,
+			.max = 96000,
+			.integer = 1,
+		};
+		return snd_interval_refine(r, &t);
+	}
+
+	return 0;
+}
+
+static int snd_madifx_hw_rule_in_channels(struct snd_pcm_hw_params *params,
+				      struct snd_pcm_hw_rule *rule)
+{
+	unsigned int list[3];
+	struct mfx *mfx = rule->private;
+	struct snd_interval *c = hw_param_interval(params,
+			SNDRV_PCM_HW_PARAM_CHANNELS);
+
+	list[0] = mfx->qs_in_channels;
+	list[1] = mfx->ds_in_channels;
+	list[2] = mfx->ss_in_channels;
+	return snd_interval_list(c, 3, list, 0);
+}
+
+static int snd_madifx_hw_rule_out_channels(struct snd_pcm_hw_params *params,
+				      struct snd_pcm_hw_rule *rule)
+{
+	unsigned int list[3];
+	struct mfx *mfx = rule->private;
+	struct snd_interval *c = hw_param_interval(params,
+			SNDRV_PCM_HW_PARAM_CHANNELS);
+
+	list[0] = mfx->qs_out_channels;
+	list[1] = mfx->ds_out_channels;
+	list[2] = mfx->ss_out_channels;
+	return snd_interval_list(c, 3, list, 0);
+}
+
+
+static int snd_madifx_playback_open(struct snd_pcm_substream *substream)
+{
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	spin_lock_irq(&mfx->lock);
+
+	snd_pcm_set_sync(substream);
+
+
+	runtime->hw = snd_madifx_playback_subinfo;
+
+	if (mfx->capture_substream == NULL)
+		madifx_stop_audio(mfx);
+
+	mfx->playback_pid = current->pid;
+	mfx->playback_substream = substream;
+
+	spin_unlock_irq(&mfx->lock);
+
+	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
+	snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
+
+	switch (mfx->io_type) {
+	case MADIFX:
+		snd_pcm_hw_constraint_minmax(runtime,
+					     SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+					     32, 4096);
+		snd_pcm_hw_constraint_minmax(runtime,
+					     SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+					     8192, 8192);
+		break;
+
+	default:
+		snd_pcm_hw_constraint_minmax(runtime,
+					     SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+					     64, 8192);
+		break;
+	}
+
+	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+			snd_madifx_hw_rule_rate_out_channels, mfx,
+			SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+
+	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+			snd_madifx_hw_rule_out_channels, mfx,
+			SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+
+	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+			snd_madifx_hw_rule_out_channels_rate, mfx,
+			SNDRV_PCM_HW_PARAM_RATE, -1);
+
+	return 0;
+}
+
+static int snd_madifx_playback_release(struct snd_pcm_substream *substream)
+{
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+
+	spin_lock_irq(&mfx->lock);
+
+	mfx->playback_pid = -1;
+	mfx->playback_substream = NULL;
+
+	spin_unlock_irq(&mfx->lock);
+
+	return 0;
+}
+
+
+static int snd_madifx_capture_open(struct snd_pcm_substream *substream)
+{
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	spin_lock_irq(&mfx->lock);
+	snd_pcm_set_sync(substream);
+	runtime->hw = snd_madifx_capture_subinfo;
+
+	if (mfx->playback_substream == NULL)
+		madifx_stop_audio(mfx);
+
+	mfx->capture_pid = current->pid;
+	mfx->capture_substream = substream;
+
+	spin_unlock_irq(&mfx->lock);
+
+	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
+	snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
+
+	switch (mfx->io_type) {
+	case MADIFX:
+		snd_pcm_hw_constraint_minmax(runtime,
+					     SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+					     32, 4096);
+		snd_pcm_hw_constraint_minmax(runtime,
+					     SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+					     8192, 8192);
+		break;
+
+	default:
+		snd_pcm_hw_constraint_minmax(runtime,
+					     SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+					     64, 8192);
+		break;
+	}
+
+	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+			snd_madifx_hw_rule_rate_in_channels, mfx,
+			SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+
+	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+			snd_madifx_hw_rule_in_channels, mfx,
+			SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+
+	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+			snd_madifx_hw_rule_in_channels_rate, mfx,
+			SNDRV_PCM_HW_PARAM_RATE, -1);
+
+	return 0;
+}
+
+static int snd_madifx_capture_release(struct snd_pcm_substream *substream)
+{
+	struct mfx *mfx = snd_pcm_substream_chip(substream);
+
+	spin_lock_irq(&mfx->lock);
+
+	mfx->capture_pid = -1;
+	mfx->capture_substream = NULL;
+
+	spin_unlock_irq(&mfx->lock);
+	return 0;
+}
+
+static int snd_madifx_hwdep_dummy_op(struct snd_hwdep *hw, struct file *file)
+{
+	/* we have nothing to initialize but the call is required */
+	return 0;
+}
+
+static inline int copy_u32_le(void __user *dest, void __iomem *src)
+{
+	u32 val = readl(src);
+
+	return copy_to_user(dest, &val, 4);
+}
+
+static int snd_madifx_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
+		unsigned int cmd, unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	struct mfx *mfx = hw->private_data;
+	struct madifx_config info;
+	struct madifx_status status;
+#ifdef CONFIG_SND_MADIFX_BROKEN
+	struct madifx_level_buffer *levels;
+	struct madifx_mixer_ioctl mixer;
+	unsigned long int s;
+#endif /* CONFIG_SND_MADIFX_BROKEN */
+	int i = 0;
+
+	switch (cmd) {
+
+#ifdef CONFIG_SND_MADIFX_BROKEN
+	int row;
+
+	case SNDRV_MADIFX_IOCTL_GET_LEVEL:
+
+		levels = &(mfx->peak_rms);
+		for (row = 1; row <= 5 ; row++) {
+			int rms_index, peak_index;
+			u32 *target_rms, *target_peak;
+
+			switch (row) {
+			case 1:
+				rms_index = MADIFX_RD_RMS_IN;
+				peak_index = MADIFX_RD_PEAK_IN;
+				target_rms = levels->rms_in;
+				target_peak = levels->peak_in;
+				break;
+			case 2:
+				rms_index = MADIFX_RD_RMS_PLAY;
+				peak_index = MADIFX_RD_PEAK_PLAY;
+				target_rms = levels->rms_play;
+				target_peak = levels->peak_play;
+				break;
+			case 3:
+				rms_index = MADIFX_RD_RMS_OUT;
+				peak_index = MADIFX_RD_PEAK_OUT;
+				target_rms = levels->rms_out;
+				target_peak = levels->peak_out;
+				break;
+			case 4:
+				rms_index = MADIFX_RD_RMS_IN_PRE;
+				peak_index = MADIFX_RD_PEAK_IN_PRE;
+				target_rms = levels->rms_in_pre;
+				target_peak = levels->peak_in_pre;
+				break;
+			default:
+				rms_index = MADIFX_RD_RMS_OUT_PRE;
+				peak_index = MADIFX_RD_PEAK_OUT_PRE;
+				target_rms = levels->rms_out_pre;
+				target_peak = levels->peak_out_pre;
+				break;
+			}
+
+			for (i = 0; i < 2 * 256; i++)
+				*(target_rms + i) =
+					mfx->level_buffer[rms_index + i];
+
+			for (i = 0; i < 256; i++)
+				*(target_peak + i) =
+					mfx->level_buffer[peak_index + i];
+		}
+
+		levels->speed = mfx->speedmode;
+
+		s = copy_to_user(argp, levels,
+				 sizeof(struct madifx_level_buffer));
+		if (0 != s) {
+			/* snd_printk(KERN_ERR "copy_to_user(.., .., %lu): %lu
+			 [Levels]\n", sizeof(struct madifx_peak_rms), s);
+			 */
+			return -EFAULT;
+		}
+
+		madifx_write(mfx, MADIFX_START_LEVEL, 0);
+
+		break;
+#endif /* CONFIG_SND_MADIFX_BROKEN */
+
+
+	case SNDRV_MADIFX_IOCTL_GET_CONFIG:
+
+		memset(&info, 0, sizeof(info));
+		spin_lock_irq(&mfx->lock);
+
+		for (i = 0; i < ARRAY_SIZE(info.madi_tx_64); i++) {
+			info.madi_tx_64[i] = madifx_read_toggle_setting(mfx,
+					(MADIFX_madi1_tx_64ch << i));
+
+			info.madi_smux[i] = madifx_read_toggle_setting(mfx,
+					(MADIFX_madi1_smux << i));
+		}
+
+		info.wcterm = madifx_read_toggle_setting(mfx,
+				MADIFX_WCK_TERM);
+
+		info.wck48 = madifx_read_toggle_setting(mfx, MADIFX_WCK48);
+
+		info.aespro = madifx_read_toggle_setting(mfx, MADIFX_PRO);
+
+		info.redundancy_mode = madifx_read_toggle_setting(mfx,
+				MADIFX_redundancy_mode);
+
+		info.mirror_madi_out = madifx_read_toggle_setting(mfx,
+				MADIFX_mirror_madi_out);
+
+
+		spin_unlock_irq(&mfx->lock);
+		if (copy_to_user(argp, &info, sizeof(info)))
+			return -EFAULT;
+		break;
+
+	case SNDRV_MADIFX_IOCTL_GET_STATUS:
+		memset(&status, 0, sizeof(status));
+
+		status.card_type = mfx->io_type;
+
+		status.clock_selection = madifx_get_clock_select(mfx);
+
+		status.system_sample_rate =
+			madifx_get_system_sample_rate(mfx);
+
+
+		for (i = 0; i < ARRAY_SIZE(status.sync_check); i++) {
+			status.sync_check[i] = madifx_sync_check(mfx, i);
+			status.external_sample_rates[i] =
+				HDSPM_bit2freq(
+					madifx_external_freq_index(mfx, i));
+		}
+
+		for (i = 0; i < ARRAY_SIZE(status.madi_channelcount); i++) {
+			status.madi_channelcount[i] =
+				madifx_get_madichannelcount(mfx, i);
+		}
+
+
+		if (copy_to_user(argp, &status, sizeof(status)))
+			return -EFAULT;
+
+
+		break;
+
+#ifdef CONFIG_SND_MADIFX_BROKEN
+	case SNDRV_MADIFX_IOCTL_GET_MIXER:
+		if (copy_from_user(&mixer, argp, sizeof(mixer)))
+			return -EFAULT;
+		if (copy_to_user((void __user *)mixer.mixer, mfx->newmixer,
+					sizeof(struct madifx_newmixer)))
+			return -EFAULT;
+		break;
+#endif /* CONFIG_SND_MADIFX_BROKEN */
+
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static struct snd_pcm_ops snd_madifx_playback_ops = {
+	.open = snd_madifx_playback_open,
+	.close = snd_madifx_playback_release,
+	.ioctl = snd_madifx_ioctl,
+	.hw_params = snd_madifx_hw_params,
+	.hw_free = snd_madifx_hw_free,
+	.prepare = snd_madifx_prepare,
+	.trigger = snd_madifx_trigger,
+	.pointer = snd_madifx_hw_pointer,
+	.page = snd_pcm_sgbuf_ops_page,
+};
+
+static struct snd_pcm_ops snd_madifx_capture_ops = {
+	.open = snd_madifx_capture_open,
+	.close = snd_madifx_capture_release,
+	.ioctl = snd_madifx_ioctl,
+	.hw_params = snd_madifx_hw_params,
+	.hw_free = snd_madifx_hw_free,
+	.prepare = snd_madifx_prepare,
+	.trigger = snd_madifx_trigger,
+	.pointer = snd_madifx_hw_pointer,
+	.page = snd_pcm_sgbuf_ops_page,
+};
+
+static int snd_madifx_create_hwdep(struct snd_card *card,
+					    struct mfx *mfx)
+{
+	struct snd_hwdep *hw;
+	int err;
+
+	err = snd_hwdep_new(card, "MADIFX hwdep", 0, &hw);
+	if (err < 0)
+		return err;
+
+	mfx->hwdep = hw;
+	hw->private_data = mfx;
+	strcpy(hw->name, "MADIFX hwdep interface");
+
+	hw->ops.open = snd_madifx_hwdep_dummy_op;
+	hw->ops.ioctl = snd_madifx_hwdep_ioctl;
+	hw->ops.ioctl_compat = snd_madifx_hwdep_ioctl;
+	hw->ops.release = snd_madifx_hwdep_dummy_op;
+
+	return 0;
+}
+
+
+/*------------------------------------------------------------
+   memory interface
+ ------------------------------------------------------------*/
+static int snd_madifx_preallocate_memory(struct mfx *mfx)
+{
+	int err;
+#ifdef CONFIG_SND_MADIFX_BROKEN
+	int i;
+	int lpti; /* level page table index */
+	dma_addr_t levelPageTable[MADIFX_NUM_LEVEL_PAGES];
+#endif
+	struct snd_pcm *pcm;
+	size_t wanted;
+
+	pcm = mfx->pcm;
+
+
+	wanted = max(INPUT_DMA_BUFFER_SIZE, OUTPUT_DMA_BUFFER_SIZE);
+
+	mfx->dmaPageTable = kzalloc(sizeof(dma_addr_t) *
+			MADIFX_MAX_PAGE_TABLE_SIZE, GFP_KERNEL);
+
+	if (!mfx->dmaPageTable) {
+		dev_err(mfx->card->dev,
+			"MADIFX: unable to kmalloc dmaPageTable memory\n");
+		return -ENOMEM;
+	}
+
+	err =
+	     snd_pcm_lib_preallocate_pages_for_all(pcm,
+						   SNDRV_DMA_TYPE_DEV_SG,
+						   snd_dma_pci_data(mfx->pci),
+						   wanted,
+						   wanted);
+	if (err < 0) {
+		snd_printdd("Could not preallocate %zd Bytes\n", wanted);
+
+		return err;
+	} else {
+		snd_printdd(" Preallocated %zd Bytes\n", wanted);
+	}
+
+#ifdef CONFIG_SND_MADIFX_BROKEN
+	/* allocate level buffer */
+	err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_SG,
+			snd_dma_pci_data(mfx->pci),
+			MADIFX_LEVEL_BUFFER_SIZE, &mfx->dmaLevelBuffer);
+	if (err < 0) {
+		dev_err(mfx->card->dev,
+			"MADIFX: Unable to allocate DMA level buffer\n");
+		return -ENOMEM;
+	}
+
+	/* Fill level page table */
+	for (i = 0; i < MADIFX_NUM_LEVEL_PAGES; i++) {
+		levelPageTable[i] = snd_sgbuf_get_addr(&(mfx->dmaLevelBuffer),
+				i * MADIFX_HW_PAGE_SIZE);
+
+	}
+
+	/* Write level page table to device */
+	lpti = (MADIFX == mfx->io_type) ? MADIFX_LPTI_HMFX :
+		MADIFX_LPTI_MFXT;
+
+	for (i = 0; i < MADIFX_NUM_LEVEL_PAGES; i++) {
+		madifx_write(mfx, MADIFX_PAGE_ADDRESS_LIST + (4 * (lpti + i)),
+				levelPageTable[i]);
+	}
+
+	mfx->level_buffer = (u32 *)mfx->dmaLevelBuffer.area;
+
+	memset(mfx->level_buffer, 0, MADIFX_LEVEL_BUFFER_SIZE);
+#endif /* MADFIX_BROKEN */
+
+
+	return 0;
+}
+
+
+/* ------------- ALSA Devices ---------------------------- */
+static int snd_madifx_create_pcm(struct snd_card *card,
+					  struct mfx *mfx)
+{
+	struct snd_pcm *pcm;
+	int err;
+
+	err = snd_pcm_new(card, mfx->card_name, 0, 1, 1, &pcm);
+	if (err < 0)
+		return err;
+
+	mfx->pcm = pcm;
+	pcm->private_data = mfx;
+	strcpy(pcm->name, mfx->card_name);
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+			&snd_madifx_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
+			&snd_madifx_capture_ops);
+
+	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
+
+	err = snd_madifx_preallocate_memory(mfx);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static inline void snd_madifx_initialize_midi_flush(struct mfx *mfx)
+{
+	int i;
+
+	for (i = 0; i < mfx->midiPorts; i++)
+		snd_madifx_flush_midi_input(mfx, i);
+}
+
+static int snd_madifx_create_alsa_devices(struct snd_card *card,
+						   struct mfx *mfx)
+{
+	int err, i;
+
+	snd_printdd("Create card...\n");
+	err = snd_madifx_create_pcm(card, mfx);
+	if (err < 0)
+		return err;
+
+	i = 0;
+	while (i < mfx->midiPorts) {
+		err = snd_madifx_create_midi(card, mfx, i);
+		if (err < 0)
+			return err;
+		i++;
+	}
+
+	err = snd_madifx_create_controls(card, mfx);
+	if (err < 0)
+		return err;
+
+	err = snd_madifx_create_hwdep(card, mfx);
+	if (err < 0)
+		return err;
+
+	snd_printdd("proc init...\n");
+	snd_madifx_proc_init(mfx);
+
+	mfx->system_sample_rate = -1;
+	mfx->last_external_sample_rate = -1;
+	mfx->last_internal_sample_rate = -1;
+	mfx->playback_pid = -1;
+	mfx->capture_pid = -1;
+	mfx->capture_substream = NULL;
+	mfx->playback_substream = NULL;
+
+	snd_printdd("Set defaults...\n");
+	err = snd_madifx_set_defaults(mfx);
+	if (err < 0)
+		return err;
+
+	snd_printdd("Update mixer controls...\n");
+#if 0
+	/* FIXME: MADI FX disable, old mixer is broken */
+	madifx_update_simple_mixer_controls(mfx);
+#endif
+
+	snd_printdd("Initializeing complete ???\n");
+
+	err = snd_card_register(card);
+	if (err < 0) {
+		dev_err(mfx->card->dev,
+			    "MADIFX: error registering card\n");
+		return err;
+	}
+
+	snd_printdd("... yes now\n");
+
+	return 0;
+}
+
+static int snd_madifx_create(struct snd_card *card,
+		struct mfx *mfx) {
+
+	struct pci_dev *pci = mfx->pci;
+	int err;
+	int i;
+	unsigned long io_extent;
+
+	mfx->irq = -1;
+	mfx->card = card;
+
+	spin_lock_init(&mfx->lock);
+
+	pci_read_config_word(mfx->pci,
+			PCI_CLASS_REVISION, &mfx->firmware_rev);
+
+	strcpy(card->mixername, "Xilinx FPGA");
+	strcpy(card->driver, "MADIFX");
+
+	switch (mfx->firmware_rev) {
+	case HDSPM_MADIFX_REV:
+		mfx->io_type = MADIFX;
+		mfx->card_name = "RME MADI FX";
+		mfx->midiPorts = 4;
+		break;
+	default:
+		dev_err(mfx->card->dev,
+			"MADIFX: unknown firmware revision %x\n",
+			mfx->firmware_rev);
+		return -ENODEV;
+	}
+
+	err = pci_enable_device(pci);
+	if (err < 0)
+		return err;
+
+	pci_set_master(mfx->pci);
+
+	err = pci_request_regions(pci, "mfx");
+	if (err < 0)
+		return err;
+
+	mfx->port = pci_resource_start(pci, 0);
+	io_extent = pci_resource_len(pci, 0);
+
+	snd_printdd("grabbed memory region 0x%lx-0x%lx\n",
+			mfx->port, mfx->port + io_extent - 1);
+
+	mfx->iobase = ioremap_nocache(mfx->port, io_extent);
+	if (!mfx->iobase) {
+		dev_err(mfx->card->dev,
+			"MADIFX: unable to remap region 0x%lx-0x%lx\n",
+				mfx->port, mfx->port + io_extent - 1);
+		return -EBUSY;
+	}
+	snd_printdd("remapped region (0x%lx) 0x%lx-0x%lx\n",
+			(unsigned long)mfx->iobase, mfx->port,
+			mfx->port + io_extent - 1);
+
+	if (request_irq(pci->irq, snd_madifx_interrupt,
+			IRQF_SHARED, KBUILD_MODNAME, mfx)) {
+		dev_err(mfx->card->dev,
+			"MADIFX: unable to use IRQ %d\n", pci->irq);
+		return -EBUSY;
+	}
+
+	snd_printdd("use IRQ %d\n", pci->irq);
+
+	mfx->irq = pci->irq;
+
+	snd_printdd("kmalloc Mixer memory of %zd Bytes\n",
+			sizeof(struct madifx_newmixer));
+
+	mfx->newmixer = kzalloc(sizeof(struct madifx_newmixer), GFP_KERNEL);
+	if (!mfx->newmixer) {
+		return -ENOMEM;
+	}
+
+	/* This initialises the mixer to a static 1:1 routing.
+	 *
+	 * The new mixer is a list of tuples (C, g), where C represents
+	 * a point in the matrix (x,y) encoded into a single integer and
+	 * g the corresponding gain value.
+	 *
+	 * For a given channel number i,
+	 *    256 + i encodes the input channel
+	 * and
+	 *    i << 9 encodes the output channel.
+	 *
+	 * C is then encoded as (256 + x) | (y << 9)
+	 */
+
+	for (i = 0; i < MADIFX_NUM_OUTPUT_GAINS; i++)
+		mfx->newmixer->output_gain[i] = 0x9000;
+
+	for (i = 0; i < MADIFX_LIST_LENGTH; i++) {
+		mfx->newmixer->listCh[i] = 0;
+		mfx->newmixer->listVol[i] = 0;
+	}
+
+	for (i = 0; i < 196; i++) {
+		mfx->newmixer->listCh[i] = (256 + i) | (i << 9);
+		mfx->newmixer->listVol[i] = 32768+(32768>>3);
+	}
+
+	/* Of course, the data has to be written to the device before
+	 * something can happen.
+	 */
+	for (i = 0; i < MADIFX_LIST_LENGTH; i++) {
+		madifx_write(mfx, MADIFX_MIXER_LIST_CH + (4 * i),
+			     mfx->newmixer->listCh[i]);
+		madifx_write(mfx, MADIFX_MIXER_LIST_VOL + (4 * i),
+			     mfx->newmixer->listVol[i]);
+	}
+
+	for (i = 0; i < MADIFX_NUM_OUTPUT_GAINS; i++) {
+		madifx_write(mfx, MADIFX_WR_OUTPUT_GAIN + (4 * i),
+			     mfx->newmixer->output_gain[i]);
+	}
+
+
+	mfx->port_names_in = NULL;
+	mfx->port_names_out = NULL;
+
+	switch (mfx->io_type) {
+	case MADIFX:
+		mfx->ss_in_channels = MADIFX_SS_IN_CHANNELS;
+		mfx->ds_in_channels = MADIFX_DS_IN_CHANNELS;
+		mfx->qs_in_channels = MADIFX_QS_IN_CHANNELS;
+		mfx->ss_out_channels = MADIFX_SS_OUT_CHANNELS;
+		mfx->ds_out_channels = MADIFX_DS_OUT_CHANNELS;
+		mfx->qs_out_channels = MADIFX_QS_OUT_CHANNELS;
+		/* FIXME: portnames and stuff missing */
+		break;
+	}
+
+
+	/* texts */
+	switch (mfx->io_type) {
+	/* Keep the switch if MFXT will be different */
+	case MADIFX:
+		mfx->texts_clocksource = texts_madifx_clock_source;
+		mfx->texts_clocksource_items =
+			ARRAY_SIZE(texts_madifx_clock_source);
+		break;
+	}
+
+	tasklet_init(&mfx->midi_tasklet,
+			madifx_midi_tasklet, (unsigned long) mfx);
+
+
+	sprintf(card->id, "MADIFXtest");
+	snd_card_set_id(card, card->id);
+
+	snd_printdd("create alsa devices.\n");
+	err = snd_madifx_create_alsa_devices(card, mfx);
+	if (err < 0)
+		return err;
+
+	snd_madifx_initialize_midi_flush(mfx);
+
+	return 0;
+}
+
+
+static int snd_madifx_free(struct mfx *mfx)
+{
+
+	if (mfx->port) {
+
+		/* stop th audio, and cancel all interrupts */
+		mfx->control_register &=
+		    ~(MADIFX_START | MADIFX_IE_AUDIO |
+		      MADIFX_IEN0 | MADIFX_IEN1 |
+		      MADIFX_IEN2 | MADIFX_IEN3);
+		madifx_write(mfx, MADIFX_CONTROL_REG,
+			    mfx->control_register);
+		madifx_write(mfx, MADIFX_START_LEVEL, 0);
+	}
+
+	if (mfx->irq >= 0)
+		free_irq(mfx->irq, (void *) mfx);
+
+	kfree(mfx->newmixer);
+	kfree(mfx->dmaPageTable);
+#ifdef CONFIG_SND_MADIFX_BROKEN
+	snd_dma_free_pages(&(mfx->dmaLevelBuffer));
+#endif
+
+	iounmap(mfx->iobase);
+
+	if (mfx->port)
+		pci_release_regions(mfx->pci);
+
+	pci_disable_device(mfx->pci);
+	return 0;
+}
+
+
+static void snd_madifx_card_free(struct snd_card *card)
+{
+	struct mfx *mfx = card->private_data;
+
+	if (mfx)
+		snd_madifx_free(mfx);
+}
+
+
+static int snd_madifx_probe(struct pci_dev *pci,
+				     const struct pci_device_id *pci_id)
+{
+	static int dev;
+	struct mfx *mfx;
+	struct snd_card *card;
+	int err;
+
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	err = snd_card_new(&pci->dev, index[dev], id[dev],
+			THIS_MODULE, sizeof(struct mfx), &card);
+	if (err < 0)
+		return err;
+
+	mfx = card->private_data;
+	card->private_free = snd_madifx_card_free;
+	mfx->dev = dev;
+	mfx->pci = pci;
+
+	err = snd_madifx_create(card, mfx);
+	if (err < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	sprintf(card->shortname, "%s_%x",
+			mfx->card_name,
+			mfx->serial);
+	sprintf(card->longname, "%s S/N 0x%x at 0x%lx, irq %d",
+			mfx->card_name,
+			mfx->serial,
+			mfx->port, mfx->irq);
+
+	err = snd_card_register(card);
+	if (err < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	pci_set_drvdata(pci, card);
+
+	madifx_write(mfx, MADIFX_START_LEVEL, 1);
+
+	dev++;
+	return 0;
+}
+
+static void snd_madifx_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+	pci_set_drvdata(pci, NULL);
+}
+
+static struct pci_driver madifx_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = snd_madifx_ids,
+	.probe = snd_madifx_probe,
+	.remove = snd_madifx_remove,
+};
+
+module_pci_driver(madifx_driver);
-- 
2.1.0

Re: [PATCH 4/4] ALSA: madifx - Add support for RME MADI FX

[Takashi Iwai]

On Sat, 08 Aug 2015 18:23:37 +0200,
Adrian Knoth wrote:
> 
> Early support for the new 390 channel RME MADI FX audio interface.
> Current status:
> 
>  * PCM playback/capture working (SS and DS tested, QS untested)
>  * MIDI probably working (untested)
>  * All card settings working (e.g. TX64, SMUX, AESpro, WC-Term,
>    WC-singlespeed...)
>  * Mirror-MADI1-to-Out2+3 maybe working (untested)
>  * Redundancy mode maybe working (untested)
>  * some ioctls implemented
>  * Static mixer working (fixed 1:1 mapping)
>  * DSP **NOT** working. RME doesn't intend to release any information
>    regarding the DSP.
>  * Adjustable mixer **NOT** working (needs new userspace tools)
>  * Levelmetering **NOT** working (maybe wrong, needs new userspace
>    tools)
> 
> See https://github.com/adiknoth/madifx/ for additional information and
> helper tools.
> 
> Signed-off-by: Adrian Knoth <aknoth@google.com>

Usually this patch comes as the first in the series.

> diff --git a/sound/pci/rme9652/madifx.c b/sound/pci/rme9652/madifx.c
> new file mode 100644
> index 0000000..a66c5a4
> --- /dev/null
> +++ b/sound/pci/rme9652/madifx.c
> @@ -0,0 +1,3659 @@
> +/*
> + *   ALSA driver for RME Hammerfall DSP MADI FX audio interface(s)
> + *
> + *      Based on hdspm.c
> + *      Copyright (c) 2012-2015 Adrian Knoth <aknoth@google.com>
> + *      Copyright (c) 2003 Winfried Ritsch (IEM)
> + *      code based on hdsp.c   Paul Davis
> + *                             Marcus Andersson
> + *                             Thomas Charbonnel
> + *                             Florian Faber
> + *                             Adrian Knoth
> + *
> + *   This program is free software; you can redistribute it and/or modify
> + *   it under the terms of the GNU General Public License as published by
> + *   the Free Software Foundation; either version 2 of the License, or
> + *   (at your option) any later version.
> + *
> + *   This program is distributed in the hope that it will be useful,
> + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *   GNU General Public License for more details.
> + *
> + */
> +#include <linux/init.h>
> +#include <linux/delay.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/pci.h>
> +#include <linux/math64.h>
> +#include <linux/io.h>
> +
> +#include <sound/core.h>
> +#include <sound/control.h>
> +#include <sound/pcm.h>
> +#include <sound/pcm_params.h>
> +#include <sound/info.h>
> +#include <sound/asoundef.h>
> +#include <sound/rawmidi.h>
> +#include <sound/hwdep.h>
> +#include <sound/initval.h>
> +
> +#include <sound/madifx.h>
> +
> +static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
> +static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
> +/* Enable this card */
> +static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
> +
> +module_param_array(index, int, NULL, 0444);
> +MODULE_PARM_DESC(index, "Index value for RME MADIFX interface.");
> +
> +module_param_array(id, charp, NULL, 0444);
> +MODULE_PARM_DESC(id, "ID string for RME MADIFX interface.");
> +
> +module_param_array(enable, bool, NULL, 0444);
> +MODULE_PARM_DESC(enable, "Enable/disable specific MADIFX soundcards.");
> +
> +
> +MODULE_AUTHOR
> +(
> +	"Adrian Knoth <adi@drcomp.erfurt.thur.de>"
> +);

Put in a single line.

> +MODULE_DESCRIPTION("RME MADIFX");
> +MODULE_LICENSE("GPL");
> +MODULE_SUPPORTED_DEVICE("{{RME HDSPM-MADIFX}}");
> +
> +/* --- Write registers. ---
> +  These are defined as byte-offsets from the iobase value.  */
> +
> +#define MADIFX_CONTROL_REG	(0*4)
> +#define MADIFX_IRQ_ACK		(3*4)
> +#define MADIFX_FREQ_REG		(1*4)
> +#define MADIFX_SETTINGS_REG	(2*4)
> +#define MADIFX_START_LEVEL	(6*4)
> +#define MADIFX_midi_out0_data   (8*4)
> +#define MADIFX_midi_out1_data   (9*4)
> +#define MADIFX_midi_out2_data	(10*4)
> +#define MADIFX_midi_out3_data	(11*4)
> +#define MADIFX_ENABLE_OUTPUT	(64*4)
> +#define MADIFX_ENABLE_INPUT	(96*4)
> +#define MADIFX_MIXER_LIST_VOL	(16384*4)
> +#define MADIFX_MIXER_LIST_CH	(20480*4)
> +#define MADIFX_WR_OUTPUT_GAIN	((24576+256)*4)
> +
> +#define MADIFX_SAMPLE_FRAMES_PER_BUFFER		8192
> +
> +#define MADIFX_PAGE_ADDRESS_LIST   (8192*4)
> +
> +/* page table size in entries, multiply by 4 to get byte offset */
> +#define MADIFX_MAX_PAGE_TABLE_SIZE	4096
> +#define MADIFX_LPTI_HMFX    (MADIFX_MAX_PAGE_TABLE_SIZE/2+25*32768*8/4096)
> +#define MADIFX_LPTI_MFXT    (MADIFX_MAX_PAGE_TABLE_SIZE/2+26*32768*8/4096)
> +
> +#define HDSPM_MADI_mixerBase    32768	/* 32768-65535 for 2x64x64 Fader */
> +
> +#define HDSPM_MATRIX_MIXER_SIZE  8192	/* = 2*64*64 * 4 Byte => 32kB */
> +
> +/* --- Read registers. ---
> +   These are defined as byte-offsets from the iobase value */
> +
> +#define MADIFX_RD_STATUS	(0*4)
> +#define MADIFX_RD_INP_STATUS	(1*4)
> +#define MADIFX_RD_INP_FREQ	(2*4)
> +#define MADIFX_RD_PLL_FREQ	(3*4)
> +/* MADIFX_RD_VERSION is encoded as
> + * card_type(7..0) & "0000" & build(19..0)
> + */
> +#define MADIFX_RD_VERSION	(4*4)
> +#define MADIFX_RD_FLASH		(5*4)
> +#define MADIFX_RD_BARCODE0	(6*4)
> +#define MADIFX_RD_BARCODE1	(7*4)
> +#define MADIFX_RD_DSP_DATA	(8*4)
> +#define MADIFX_RD_DSP_STATUS	(9*4)
> +#define MADIFX_midi_in0_data	(12*4)
> +#define MADIFX_midi_in1_data	(13*4)
> +#define MADIFX_midi_in2_data	(14*4)
> +#define MADIFX_midi_in3_data	(15*4)
> +#define MADIFX_midi_out0_status	(16*4)
> +#define MADIFX_midi_out1_status	(17*4)
> +#define MADIFX_midi_out2_status	(18*4)
> +#define MADIFX_midi_out3_status	(19*4)
> +#define MADIFX_midi_in0_status	(20*4)
> +#define MADIFX_midi_in1_status	(21*4)
> +#define MADIFX_midi_in2_status	(22*4)
> +#define MADIFX_midi_in3_status	(23*4)
> +
> +/* input status */
> +
> +#define MADIFX_madi1_lock	0x0001
> +#define MADIFX_madi2_lock	0x0002
> +#define MADIFX_madi3_lock	0x0004
> +#define MADIFX_aes_lock		0x0008
> +#define MADIFX_word_lock	0x0010
> +#define MADIFX_madi1_sync	0x0020
> +#define MADIFX_madi2_sync	0x0040
> +#define MADIFX_madi3_sync	0x0080
> +#define MADIFX_word_sync	0x0100
> +#define MADIFX_aes_sync		0x0200
> +#define MADIFX_madi1_rx_64ch	0x0400
> +#define MADIFX_madi2_rx_64ch	0x0800
> +#define MADIFX_madi3_rx_64ch	0x1000
> +#define MADIFX_SelSyncRef0	0x2000
> +#define MADIFX_SelSyncRef1	0x4000
> +#define MADIFX_SelSyncRef2	0x8000
> +#define MADIFX_MADIInput0	0x10000
> +#define MADIFX_MADIInput1	0x20000
> +#define MADIFX_redundancy_rb	0x40000
> +#define MADIFX_mirror_out_rb	0x80000
> +#define MADIFX_sync_in_lock	0x100000
> +#define MADIFX_sync_in_sync	0x200000
> +
> +/* control register bits */
> +
> +#define MADIFX_START		0x00000001
> +#define MADIFX_freq0		0x00000002
> +#define MADIFX_freq1		0x00000004
> +#define MADIFX_freq2		0x00000008
> +#define MADIFX_freq3		0x00000010
> +#define MADIFX_BUF_SIZ_0	0x00000020
> +#define MADIFX_BUF_SIZ_1	0x00000040
> +#define MADIFX_BUF_SIZ_2	0x00000080
> +#define MADIFX_LAT_0		0x00000100
> +#define MADIFX_LAT_1		0x00000200
> +#define MADIFX_LAT_2		0x00000400
> +#define MADIFX_LAT_3		0x00000800
> +#define MADIFX_IE_AUDIO		0x00001000
> +#define MADIFX_IEN0		0x00002000
> +#define MADIFX_IEN1		0x00004000
> +#define MADIFX_IEN2		0x00008000
> +#define MADIFX_IEN3		0x00010000
> +#define MADIFX_float_format	0x00020000
> +#define MADIFX_CLR_TMS		0x00040000
> +#define MADIFX_Dolby		0x00080000
> +
> +#define MADIFX_kFrequencyMask \
> +		(MADIFX_freq0 + MADIFX_freq1 + MADIFX_freq2 + MADIFX_freq3)
> +#define MADIFX_kBufferPositionMask	0xFFF0
> +
> +enum {
> +	MADIFX_kFrequency32kHz	  = 0,
> +	MADIFX_kFrequency44_1kHz  = MADIFX_freq0,
> +	MADIFX_kFrequency48kHz    = MADIFX_freq1,
> +	MADIFX_kFrequency64kHz	  = MADIFX_freq2 + 0,
> +	MADIFX_kFrequency88_2kHz  = MADIFX_freq2 + MADIFX_freq0,
> +	MADIFX_kFrequency96kHz	  = MADIFX_freq2 + MADIFX_freq1,
> +	MADIFX_kFrequency128kHz	  = MADIFX_freq3 + MADIFX_freq2 + 0,
> +	MADIFX_kFrequency176_4kHz = MADIFX_freq3 + MADIFX_freq2 + MADIFX_freq0,
> +	MADIFX_kFrequency192kHz	  = MADIFX_freq3 + MADIFX_freq2 + MADIFX_freq1
> +};
> +
> +/* settings register bits */
> +
> +#define MADIFX_SyncRef0		0x00000001
> +#define MADIFX_SyncRef1		0x00000002
> +#define MADIFX_SyncRef2		0x00000004
> +#define MADIFX_PRO		0x00000008
> +#define MADIFX_DSP_EN		0x00000010
> +#define MADIFX_WCK_TERM		0x00000020
> +#define MADIFX_WCK48		0x00000040
> +#define MADIFX_madi1_tx_64ch	0x00000080
> +#define MADIFX_madi2_tx_64ch	0x00000100
> +#define MADIFX_madi3_tx_64ch	0x00000200
> +#define MADIFX_madi1_smux	0x00000400
> +#define MADIFX_madi2_smux	0x00000800
> +#define MADIFX_madi3_smux	0x00001000
> +#define MADIFX_redundancy_mode	0x00002000
> +#define MADIFX_mirror_madi_out	0x00004000
> +
> +#define MADIFX_SyncRefMask (MADIFX_SyncRef0 | MADIFX_SyncRef1 | MADIFX_SyncRef2)
> +
> +/* input freq register bits */
> +
> +#define MADIFX_madi1_freq0	0x00001
> +#define MADIFX_madi1_freq1	0x00002
> +#define MADIFX_madi1_freq2	0x00004
> +#define MADIFX_madi1_freq3	0x00008
> +#define MADIFX_madi2_freq0	0x00010
> +#define MADIFX_madi2_freq1	0x00020
> +#define MADIFX_madi2_freq2	0x00040
> +#define MADIFX_madi2_freq3	0x00080
> +#define MADIFX_madi3_freq0	0x00100
> +#define MADIFX_madi3_freq1	0x00200
> +#define MADIFX_madi3_freq2	0x00400
> +#define MADIFX_madi3_freq3	0x00800
> +#define MADIFX_aes_freq0	0x01000
> +#define MADIFX_aes_freq1	0x02000
> +#define MADIFX_aes_freq2	0x04000
> +#define MADIFX_aes_freq3	0x08000
> +#define MADIFX_word_freq0	0x10000
> +#define MADIFX_word_freq1	0x20000
> +#define MADIFX_word_freq2	0x40000
> +#define MADIFX_word_freq3	0x80000
> +#define MADIFX_sync_in_freq0	0x100000
> +#define MADIFX_sync_in_freq1	0x200000
> +#define MADIFX_sync_in_freq2	0x400000
> +#define MADIFX_sync_in_freq3	0x800000
> +
> +/* Index to DMA level buffer in uint32_t units */
> +#define MADIFX_RD_RMS_IN	(0*1)
> +#define MADIFX_RD_PEAK_IN	(512*1)
> +#define MADIFX_RD_RMS_PLAY	(1024*1)
> +#define MADIFX_RD_PEAK_PLAY	(1536*1)
> +#define MADIFX_RD_RMS_OUT	(2048*1)
> +#define MADIFX_RD_PEAK_OUT	(2560*1)
> +#define MADIFX_RD_RMS_IN_PRE	(3072*1)
> +#define MADIFX_RD_PEAK_IN_PRE	(3584*1)
> +#define MADIFX_RD_RMS_OUT_PRE	(4096*1)
> +#define MADIFX_RD_PEAK_OUT_PRE	(4608*1)
> +
> +/* MADIFX MIDI Interrupt enable */
> +#define MADIFX_IEN0		0x00002000
> +#define MADIFX_IEN1		0x00004000
> +#define MADIFX_IEN2		0x00008000
> +#define MADIFX_IEN3		0x00010000
> +
> +/* status register, MIDI IRQ Pending */
> +#define MADIFX_mIRQ0		0x10000000
> +#define MADIFX_mIRQ1		0x20000000
> +#define MADIFX_mIRQ2		0x40000000
> +#define MADIFX_mIRQ3		0x80000000
> +
> +/* --- bit helper defines */
> +#define MADIFX_LatencyMask (MADIFX_LAT_0|MADIFX_LAT_1|MADIFX_LAT_2|MADIFX_LAT_3)
> +
> +#define madifx_encode_latency(x)       (((x)<<8) & MADIFX_LatencyMask)
> +#define madifx_decode_latency(x)       ((((x) & MADIFX_LatencyMask)>>8))
> +
> +/* speemode is enum 0,1,2 for ss/ds/qs, so (1<<speedmode) returns 1, 2, 4. */
> +#define madifx_speed_multiplier(x)	(1<<(x)->speedmode)
> +
> +
> +#define HDSPM_audioIRQPending    (1<<0)	/* IRQ is high and pending */
> +
> +
> +
> +/* Mixer Values */
> +#define UNITY_GAIN          32768	/* = 65536/2 */
> +#define MINUS_INFINITY_GAIN 0
> +
> +/* Number of channels for different Speed Modes */
> +#define MADIFX_SS_IN_CHANNELS       194
> +#define MADIFX_DS_IN_CHANNELS       98
> +#define MADIFX_QS_IN_CHANNELS       50
> +
> +#define MADIFX_SS_OUT_CHANNELS       196
> +#define MADIFX_DS_OUT_CHANNELS       100
> +#define MADIFX_QS_OUT_CHANNELS       52
> +
> +
> +#define HDSPM_MADIFX_REV	213
> +
> +/* speed factor modes */
> +#define HDSPM_SPEED_SINGLE 0
> +#define HDSPM_SPEED_DOUBLE 1
> +#define HDSPM_SPEED_QUAD   2
> +
> +/* DMA buffers in byte; 8192 samples per channel, each 4 bytes wide */
> +#define NUM_INPUTS_S_MFXT	(64*3+4)
> +#define NUM_OUTPUTS_S_MFXT	(64*3+6)
> +#define INPUT_DMA_BUFFER_SIZE (NUM_INPUTS_S_MFXT*32768)
> +#define OUTPUT_DMA_BUFFER_SIZE (NUM_OUTPUTS_S_MFXT*32768)
> +
> +
> +
> +/* names for speed modes */
> +static char *madifx_speed_names[] = { "single", "double", "quad" };
> +
> +static const char *const texts_madifx_clock_source[] = {
> +	"Internal",
> +	"Word Clock", /* OSX driver has first AES, then WC, but real HW is
> +			 different */
> +	"AES In",
> +	"MADI 1 In",
> +	"MADI 2 In",
> +	"MADI 3 In",
> +	"Sync In"
> +};
> +
> +
> +static const char *const texts_freq[] = {
> +	"No Lock",
> +	"32 kHz",
> +	"44.1 kHz",
> +	"48 kHz",
> +	"64 kHz",
> +	"88.2 kHz",
> +	"96 kHz",
> +	"128 kHz",
> +	"176.4 kHz",
> +	"192 kHz"
> +};
> +
> +
> +struct madifx_midi {
> +	struct mfx *mfx;
> +	int id;
> +	struct snd_rawmidi *rmidi;
> +	struct snd_rawmidi_substream *input;
> +	struct snd_rawmidi_substream *output;
> +	char istimer;		/* timer in use */
> +	struct timer_list timer;
> +	spinlock_t lock;
> +	int pending;
> +	int dataIn;
> +	int statusIn;
> +	int dataOut;
> +	int statusOut;
> +	int ie;
> +	int irq;
> +};
> +
> +
> +struct mfx {
> +	spinlock_t lock;
> +	/* only one playback and/or capture stream */
> +	struct snd_pcm_substream *capture_substream;
> +	struct snd_pcm_substream *playback_substream;
> +
> +	char *card_name;	     /* for procinfo */
> +	unsigned short firmware_rev;
> +
> +	uint8_t io_type;

The standard type for kernel codes is u8, if it really must be 8bit
unsigned integer.  Otherwise use unsigned char like other fields.

> +
> +	int monitor_outs;	/* set up monitoring outs init flag */
> +
> +	u32 control_register;	/* cached value */
> +	u32 control2_register;	/* cached value */
> +	u32 settings_register;
> +
> +	struct madifx_midi midi[4];
> +	struct tasklet_struct midi_tasklet;

Please avoid tasklet as much as possible.  It's an interface that
might be removed in future.


> +	size_t period_bytes;
> +	unsigned char ss_in_channels;
> +	unsigned char ds_in_channels;
> +	unsigned char qs_in_channels;
> +	unsigned char ss_out_channels;
> +	unsigned char ds_out_channels;
> +	unsigned char qs_out_channels;
> +
> +	unsigned char max_channels_in;
> +	unsigned char max_channels_out;
> +
> +	char **port_names_in;
> +	char **port_names_out;
> +
> +	char **port_names_in_ss, **port_names_in_ds, **port_names_in_qs;
> +	char **port_names_out_ss, **port_names_out_ds, **port_names_out_qs;
> +
> +	unsigned char *playback_buffer;	/* suitably aligned address */
> +	unsigned char *capture_buffer;	/* suitably aligned address */
> +	u32 *level_buffer;	/* suitably aligned address */
> +
> +	pid_t capture_pid;	/* process id which uses capture */
> +	pid_t playback_pid;	/* process id which uses capture */
> +	int running;		/* running status */
> +
> +	int last_external_sample_rate;	/* samplerate mystic ... */
> +	int last_internal_sample_rate;
> +	int system_sample_rate;
> +
> +	int dev;		/* Hardware vars... */
> +	int irq;
> +	unsigned long port;
> +	void __iomem *iobase;
> +
> +	int irq_count;		/* for debug */
> +	int midiPorts;
> +
> +	struct snd_card *card;	/* one card */
> +	struct snd_pcm *pcm;		/* has one pcm */
> +	struct snd_hwdep *hwdep;	/* and a hwdep for additional ioctl */
> +	struct pci_dev *pci;	/* and an pci info */
> +
> +	/* Mixer vars */
> +	/* full mixer accessible over mixer ioctl or hwdep-device */
> +	struct madifx_newmixer *newmixer;
> +	dma_addr_t *dmaPageTable;

Better to run scripts/checkpatch.pl once...


> +
> +	const char *const *texts_clocksource;
> +	int texts_clocksource_items;
> +
> +	cycles_t last_interrupt;
> +
> +	unsigned int serial;
> +
> +	int speedmode;
> +
> +#ifdef CONFIG_SND_MADIFX_BROKEN
> +	struct snd_dma_buffer dmaLevelBuffer;
> +	struct madifx_level_buffer peak_rms;
> +#endif
> +
> +};
> +
> +
> +static const struct pci_device_id snd_madifx_ids[] = {
> +	{
> +	 .vendor = PCI_VENDOR_ID_XILINX,
> +	 .device = 0x3fc7,
> +	 .subvendor = PCI_ANY_ID,
> +	 .subdevice = PCI_ANY_ID,
> +	 .class = 0,
> +	 .class_mask = 0,
> +	 .driver_data = 0},

Use standard macro.


> +	{0,}
> +};
> +
> +MODULE_DEVICE_TABLE(pci, snd_madifx_ids);
> +
> +/* prototypes */
> +static int snd_madifx_create_alsa_devices(struct snd_card *card,
> +						   struct mfx *mfx);
> +static int snd_madifx_create_pcm(struct snd_card *card,
> +					  struct mfx *mfx);
> +
> +static inline void snd_madifx_initialize_midi_flush(struct mfx *mfx);
> +static int madifx_external_freq_index(struct mfx *mfx,
> +				      enum madifx_syncsource port);
> +static int madifx_get_clock_select(struct mfx *mfx);
> +static int snd_madifx_set_defaults(struct mfx *mfx);
> +static int madifx_system_clock_mode(struct mfx *mfx);
> +
> +static inline int HDSPM_bit2freq(int n)
> +{
> +	static const int bit2freq_tab[] = {
> +		0, 32000, 44100, 48000, 64000, 88200,
> +		96000, 128000, 176400, 192000 };
> +	if (n < 1 || n > 9)
> +		return 0;
> +	return bit2freq_tab[n];
> +}
> +
> +/* Write/read to/from HDSPM with Adresses in Bytes
> +   not words but only 32Bit writes are allowed */
> +
> +static inline void madifx_write(struct mfx *mfx, unsigned int reg,
> +			       unsigned int val)
> +{
> +	writel(val, mfx->iobase + reg);
> +}
> +
> +static inline unsigned int madifx_read(struct mfx *mfx, unsigned int reg)
> +{
> +	return readl(mfx->iobase + reg);
> +}
> +
> +/* enable DMA for specific channels, now available for DSP-MADI */
> +static inline void snd_madifx_enable_in(struct mfx *mfx, int i, int v)
> +{
> +	madifx_write(mfx, MADIFX_ENABLE_INPUT + (4 * i), v);
> +}
> +
> +static inline void snd_madifx_enable_out(struct mfx *mfx, int i, int v)
> +{
> +	madifx_write(mfx, MADIFX_ENABLE_OUTPUT + (4 * i), v);
> +}
> +
> +/* check if same process is writing and reading */
> +static int snd_madifx_use_is_exclusive(struct mfx *mfx)
> +{
> +	unsigned long flags;
> +	int ret = 1;
> +
> +	spin_lock_irqsave(&mfx->lock, flags);
> +	if ((mfx->playback_pid != mfx->capture_pid) &&
> +	    (mfx->playback_pid >= 0) && (mfx->capture_pid >= 0)) {
> +		ret = 0;
> +	}
> +	spin_unlock_irqrestore(&mfx->lock, flags);
> +	return ret;
> +}
> +
> +
> +/* return latency in samples per period */
> +static int madifx_get_latency(struct mfx *mfx)
> +{
> +	int n;
> +
> +	n = madifx_decode_latency(mfx->control_register);
> +
> +	return 1 << (n + 5);
> +}
> +
> +/* Latency function */
> +static inline void madifx_compute_period_size(struct mfx *mfx)
> +{
> +	mfx->period_bytes = 4 * madifx_get_latency(mfx);
> +}
> +
> +
> +/* position of the hardware pointer in the buffer */
> +static snd_pcm_uframes_t madifx_hw_pointer(struct mfx *mfx)
> +{
> +	u32 position;
> +
> +	position = madifx_read(mfx, MADIFX_RD_STATUS);
> +
> +	position &= MADIFX_kBufferPositionMask;
> +	position >>= 4;
> +	position *= 4;
> +#if 0
> +	position -= 4; /* safety offset */
> +#endif
> +	position &= (MADIFX_SAMPLE_FRAMES_PER_BUFFER-1);
> +
> +	return position;
> +}
> +
> +static inline void madifx_start_audio(struct mfx *s)
> +{
> +	s->control_register |= (MADIFX_IE_AUDIO | MADIFX_START);
> +	madifx_write(s, MADIFX_CONTROL_REG, s->control_register);
> +}
> +
> +static inline void madifx_stop_audio(struct mfx *s)
> +{
> +	s->control_register &= ~(MADIFX_START | MADIFX_IE_AUDIO);
> +	madifx_write(s, MADIFX_CONTROL_REG, s->control_register);
> +}
> +
> +static void madifx_silence_playback(struct mfx *mfx)
> +{
> +	void *buf = mfx->playback_buffer;
> +
> +	if (buf == NULL)
> +		return;
> +
> +	memset(buf, 0, OUTPUT_DMA_BUFFER_SIZE);
> +}
> +
> +static int madifx_set_interrupt_interval(struct mfx *s, unsigned int frames)
> +{
> +	int n;
> +
> +	spin_lock_irq(&s->lock);
> +
> +	/* FIXME: We have four bits, but we don't know the mapping to frames,
> +	 * yet.
> +	 * LAT_3 is 2048
> +	 * LAT_2 is 128
> +	 * LAT_1 is 32
> +	 * LAT_0 is 16
> +	 *
> +	 * 2^(n+4), encode n to 4 bits
> +	 */
> +	n = 0;
> +	frames >>= 6;
> +	while (frames) {
> +		n++;
> +		frames >>= 1;
> +	}
> +
> +	s->control_register &= ~MADIFX_LatencyMask;
> +	s->control_register |= madifx_encode_latency(n);
> +
> +	madifx_write(s, MADIFX_CONTROL_REG, s->control_register);
> +
> +	madifx_compute_period_size(s);
> +
> +	spin_unlock_irq(&s->lock);
> +
> +	return 0;
> +}
> +
> +static u64 madifx_calc_dds_value(struct mfx *mfx, u64 period)
> +{
> +	u64 freq_const;
> +
> +	if (period == 0)
> +		return 0;
> +
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		freq_const = 131072000000000ULL;
> +		break;
> +	default:
> +		snd_BUG();
> +		return 0;
> +	}
> +
> +	return div_u64(freq_const, period);
> +}
> +
> +
> +static void madifx_set_dds_value(struct mfx *mfx, int rate)
> +{
> +	u64 n;
> +
> +	if (rate >= 112000)
> +		rate /= 4;
> +	else if (rate >= 56000)
> +		rate /= 2;
> +
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		n = 131072000000000ULL;  /* 125 MHz */
> +		break;
> +	default:
> +		snd_BUG();
> +		return;
> +	}
> +
> +	n = div_u64(n, rate);
> +	/* n should be less than 2^32 for being written to FREQ register */
> +	snd_BUG_ON(n >> 32);
> +	madifx_write(mfx, MADIFX_FREQ_REG, (u32)n);
> +}
> +
> +static int madifx_get_external_rate(struct mfx *mfx)
> +{
> +	int current_clock = madifx_get_clock_select(mfx);
> +
> +	/* map to enum madifx_syncsource */
> +	switch (current_clock) {
> +	case 0:
> +	case 6:
> +		/* Master or Sync-In */
> +		break;
> +	case 1:
> +		current_clock = syncsource_wc;
> +		break;
> +	case 2:
> +		current_clock = syncsource_aes;
> +		break;
> +	case 3:
> +	case 4:
> +	case 5:
> +		/* MADI1 == 3, MADI2 == 4, MADI3 == 5 map to
> +		 * MADI1 == 0, MADI2 = 1, MADI3 == 2
> +		 */
> +		current_clock -= 3;
> +		break;
> +	default:
> +		dev_err(mfx->card->dev,
> +				"MADIFX: Unknown clock source\n");
> +		return 0;
> +	}
> +
> +
> +
> +	return HDSPM_bit2freq(madifx_external_freq_index(mfx, current_clock));
> +}
> +
> +/* dummy set rate lets see what happens */
> +static int madifx_set_rate(struct mfx *mfx, int rate, int called_internally)
> +{
> +	int current_rate;
> +	int rate_bits;
> +	int not_set = 0;
> +	int current_speed, target_speed;
> +
> +	/* ASSUMPTION: mfx->lock is either set, or there is no need for
> +	   it (e.g. during module initialization).
> +	 */
> +
> +	if (1 == madifx_system_clock_mode(mfx)) {
> +
> +		/* SLAVE --- */
> +		if (called_internally) {
> +
> +			/* request from ctl or card initialization
> +			   just make a warning an remember setting
> +			   for future master mode switching */
> +
> +			dev_warn(mfx->card->dev,
> +				"MADIFX: Warning: device is not running as a clock master.\n");
> +			not_set = 1;
> +		} else {
> +			int external_freq = madifx_get_external_rate(mfx);
> +
> +
> +
> +			if (rate != external_freq) {
> +				dev_warn(mfx->card->dev,
> +				    "MADIFX: Warning: Requested rate %d doesn't match external rate %d\n",
> +				    rate, external_freq);
> +				not_set = 1;
> +			}
> +		}
> +	}
> +
> +	current_rate = mfx->system_sample_rate;
> +
> +	/* Changing between Singe, Double and Quad speed is not
> +	   allowed if any substreams are open. This is because such a change
> +	   causes a shift in the location of the DMA buffers and a reduction
> +	   in the number of available buffers.
> +
> +	   Note that a similar but essentially insoluble problem exists for
> +	   externally-driven rate changes. All we can do is to flag rate
> +	   changes in the read/write routines.
> +	 */
> +
> +	if (current_rate <= 56000)
> +		current_speed = HDSPM_SPEED_SINGLE;
> +	else if (current_rate <= 96000)
> +		current_speed = HDSPM_SPEED_DOUBLE;
> +	else
> +		current_speed = HDSPM_SPEED_QUAD;
> +
> +	if (rate <= 48000)
> +		target_speed = HDSPM_SPEED_SINGLE;
> +	else if (rate <= 112000)
> +		target_speed = HDSPM_SPEED_DOUBLE;
> +	else
> +		target_speed = HDSPM_SPEED_QUAD;
> +
> +	switch (rate) {
> +	case 32000:
> +		rate_bits = MADIFX_kFrequency32kHz;
> +		break;
> +	case 44100:
> +		rate_bits = MADIFX_kFrequency44_1kHz;
> +		break;
> +	case 48000:
> +		rate_bits = MADIFX_kFrequency48kHz;
> +		break;
> +	case 64000:
> +		rate_bits = MADIFX_kFrequency64kHz;
> +		break;
> +	case 88200:
> +		rate_bits = MADIFX_kFrequency88_2kHz;
> +		break;
> +	case 96000:
> +		rate_bits = MADIFX_kFrequency96kHz;
> +		break;
> +	case 128000:
> +		rate_bits = MADIFX_kFrequency128kHz;
> +		break;
> +	case 176400:
> +		rate_bits = MADIFX_kFrequency176_4kHz;
> +		break;
> +	case 192000:
> +		rate_bits = MADIFX_kFrequency192kHz;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	if (current_speed != target_speed
> +	    && (mfx->capture_pid >= 0 || mfx->playback_pid >= 0)) {
> +		dev_err
> +		    (mfx->card->dev,
> +		     "MADIFX: cannot change from %s speed to %s speed mode (capture PID = %d, playback PID = %d)\n",
> +		     madifx_speed_names[current_speed],
> +		     madifx_speed_names[target_speed],
> +		     mfx->capture_pid, mfx->playback_pid);
> +		return -EBUSY;
> +	}
> +
> +	madifx_set_dds_value(mfx, rate);
> +
> +	mfx->control_register &= ~MADIFX_kFrequencyMask;
> +	mfx->control_register |= rate_bits;
> +	madifx_write(mfx, MADIFX_CONTROL_REG, mfx->control_register);
> +
> +
> +
> +	mfx->system_sample_rate = rate;
> +
> +	if (rate <= 56000) {
> +		mfx->max_channels_in = mfx->ss_in_channels;
> +		mfx->max_channels_out = mfx->ss_out_channels;
> +		mfx->port_names_in = mfx->port_names_in_ss;
> +		mfx->port_names_out = mfx->port_names_out_ss;
> +		mfx->speedmode = ss;
> +	} else if (rate <= 112000) {
> +		mfx->max_channels_in = mfx->ds_in_channels;
> +		mfx->max_channels_out = mfx->ds_out_channels;
> +		mfx->port_names_in = mfx->port_names_in_ds;
> +		mfx->port_names_out = mfx->port_names_out_ds;
> +		mfx->speedmode = ds;
> +	} else {
> +		mfx->max_channels_in = mfx->qs_in_channels;
> +		mfx->max_channels_out = mfx->qs_out_channels;
> +		mfx->port_names_in = mfx->port_names_in_qs;
> +		mfx->port_names_out = mfx->port_names_out_qs;
> +		mfx->speedmode = qs;
> +	}
> +
> +	if (not_set != 0)
> +		return -1;
> +
> +	return 0;
> +}
> +
> +/*----------------------------------------------------------------------------
> +   MIDI
> +  ----------------------------------------------------------------------------*/
> +
> +static inline unsigned char snd_madifx_midi_read_byte(struct mfx *mfx,
> +						      int id)
> +{
> +	/* the hardware already does the relevant bit-mask with 0xff */
> +	return madifx_read(mfx, mfx->midi[id].dataIn);
> +}
> +
> +static inline void snd_madifx_midi_write_byte(struct mfx *mfx, int id,
> +					      int val)
> +{
> +	/* the hardware already does the relevant bit-mask with 0xff */
> +	return madifx_write(mfx, mfx->midi[id].dataOut, val);
> +}
> +
> +static inline int snd_madifx_midi_input_available(struct mfx *mfx, int id)
> +{
> +	return madifx_read(mfx, mfx->midi[id].statusIn) & 0xFF;
> +}
> +
> +static inline int snd_madifx_midi_output_possible(struct mfx *mfx, int id)
> +{
> +	int fifo_bytes_used;
> +
> +	fifo_bytes_used = madifx_read(mfx, mfx->midi[id].statusOut) & 0xFF;
> +
> +	if (fifo_bytes_used < 128)
> +		return  128 - fifo_bytes_used;
> +	else
> +		return 0;
> +}
> +
> +static void snd_madifx_flush_midi_input(struct mfx *mfx, int id)
> +{
> +	while (snd_madifx_midi_input_available(mfx, id))
> +		snd_madifx_midi_read_byte(mfx, id);
> +}
> +
> +static int snd_madifx_midi_output_write(struct madifx_midi *hmidi)
> +{
> +	unsigned long flags;
> +	int n_pending;
> +	int to_write;
> +	int i;
> +	unsigned char buf[128];
> +
> +	/* Output is not interrupt driven */
> +
> +	spin_lock_irqsave(&hmidi->lock, flags);
> +	if (hmidi->output &&
> +	    !snd_rawmidi_transmit_empty(hmidi->output)) {
> +		n_pending = snd_madifx_midi_output_possible(hmidi->mfx,
> +							    hmidi->id);
> +		if (n_pending > 0) {
> +			if (n_pending > (int)sizeof(buf))
> +				n_pending = sizeof(buf);

Can this happen?

> +
> +			to_write = snd_rawmidi_transmit(hmidi->output, buf,
> +							 n_pending);
> +			if (to_write > 0) {
> +				for (i = 0; i < to_write; ++i)
> +					snd_madifx_midi_write_byte(hmidi->mfx,
> +								   hmidi->id,
> +								   buf[i]);
> +			}
> +		}
> +	}
> +	spin_unlock_irqrestore(&hmidi->lock, flags);
> +	return 0;
> +}
> +
> +static int snd_madifx_midi_input_read(struct madifx_midi *hmidi)
> +{
> +	unsigned char buf[128]; /* this buffer is designed to match the MIDI
> +				 * input FIFO size
> +				 */
> +	unsigned long flags;
> +	int n_pending;
> +	int i;
> +
> +	spin_lock_irqsave(&hmidi->lock, flags);
> +	n_pending = snd_madifx_midi_input_available(hmidi->mfx, hmidi->id);
> +	if (n_pending > 0) {
> +		if (hmidi->input) {
> +			if (n_pending > (int)sizeof(buf))
> +				n_pending = sizeof(buf);

Ditto.

> +			for (i = 0; i < n_pending; ++i)
> +				buf[i] = snd_madifx_midi_read_byte(hmidi->mfx,
> +								   hmidi->id);
> +			if (n_pending)
> +				snd_rawmidi_receive(hmidi->input, buf,
> +						     n_pending);
> +		} else {
> +			/* flush the MIDI input FIFO */
> +			while (n_pending--)
> +				snd_madifx_midi_read_byte(hmidi->mfx,
> +							  hmidi->id);
> +		}
> +	}
> +	hmidi->pending = 0;
> +	spin_unlock_irqrestore(&hmidi->lock, flags);
> +
> +	spin_lock_irqsave(&hmidi->mfx->lock, flags);
> +	hmidi->mfx->control_register |= hmidi->ie;
> +	madifx_write(hmidi->mfx, MADIFX_CONTROL_REG,
> +		    hmidi->mfx->control_register);
> +	spin_unlock_irqrestore(&hmidi->mfx->lock, flags);
> +
> +	return snd_madifx_midi_output_write(hmidi);
> +}
> +
> +static void
> +snd_madifx_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
> +{
> +	struct mfx *mfx;
> +	struct madifx_midi *hmidi;
> +	unsigned long flags;
> +
> +	hmidi = substream->rmidi->private_data;
> +	mfx = hmidi->mfx;
> +
> +	spin_lock_irqsave(&mfx->lock, flags);
> +	if (up) {
> +		if (!(mfx->control_register & hmidi->ie)) {
> +			snd_madifx_flush_midi_input(mfx, hmidi->id);
> +			mfx->control_register |= hmidi->ie;
> +		}
> +	} else {
> +		mfx->control_register &= ~hmidi->ie;
> +	}
> +
> +	madifx_write(mfx, MADIFX_CONTROL_REG, mfx->control_register);
> +	spin_unlock_irqrestore(&mfx->lock, flags);
> +}
> +
> +static void snd_madifx_midi_output_timer(unsigned long data)
> +{
> +	struct madifx_midi *hmidi = (struct madifx_midi *) data;
> +	unsigned long flags;
> +
> +	snd_madifx_midi_output_write(hmidi);
> +	spin_lock_irqsave(&hmidi->lock, flags);
> +
> +	/* this does not bump hmidi->istimer, because the
> +	   kernel automatically removed the timer when it
> +	   expired, and we are now adding it back, thus
> +	   leaving istimer wherever it was set before.
> +	*/
> +
> +	if (hmidi->istimer)
> +		mod_timer(&hmidi->timer, 1 + jiffies);
> +
> +	spin_unlock_irqrestore(&hmidi->lock, flags);
> +}
> +
> +static void
> +snd_madifx_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
> +{
> +	struct madifx_midi *hmidi;
> +	unsigned long flags;
> +
> +	hmidi = substream->rmidi->private_data;
> +	spin_lock_irqsave(&hmidi->lock, flags);
> +	if (up) {
> +		if (!hmidi->istimer) {
> +			setup_timer(&hmidi->timer, snd_madifx_midi_output_timer,
> +					(unsigned long) hmidi);
> +			mod_timer(&hmidi->timer, 1 + jiffies);
> +			hmidi->istimer++;
> +		}
> +	} else {
> +		if (hmidi->istimer && --hmidi->istimer <= 0)
> +			del_timer(&hmidi->timer);
> +	}

Won't this lead to unblance of hmidi->istimer...?
And I guess it's easier/safer to use a bitmap per substream number
instead of the counter.


> +	spin_unlock_irqrestore(&hmidi->lock, flags);
> +	if (up)
> +		snd_madifx_midi_output_write(hmidi);
> +}
> +
> +static int snd_madifx_midi_input_open(struct snd_rawmidi_substream *substream)
> +{
> +	struct madifx_midi *hmidi;
> +
> +	hmidi = substream->rmidi->private_data;
> +	spin_lock_irq(&hmidi->lock);
> +	snd_madifx_flush_midi_input(hmidi->mfx, hmidi->id);
> +	hmidi->input = substream;
> +	spin_unlock_irq(&hmidi->lock);
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_midi_output_open(struct snd_rawmidi_substream *substream)
> +{
> +	struct madifx_midi *hmidi;
> +
> +	hmidi = substream->rmidi->private_data;
> +	spin_lock_irq(&hmidi->lock);
> +	hmidi->output = substream;
> +	spin_unlock_irq(&hmidi->lock);
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_midi_input_close(struct snd_rawmidi_substream *substream)
> +{
> +	struct madifx_midi *hmidi;
> +
> +	snd_madifx_midi_input_trigger(substream, 0);
> +
> +	hmidi = substream->rmidi->private_data;
> +	spin_lock_irq(&hmidi->lock);
> +	hmidi->input = NULL;
> +	spin_unlock_irq(&hmidi->lock);
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_midi_output_close(struct snd_rawmidi_substream *substream)
> +{
> +	struct madifx_midi *hmidi;
> +
> +	snd_madifx_midi_output_trigger(substream, 0);
> +
> +	hmidi = substream->rmidi->private_data;
> +	spin_lock_irq(&hmidi->lock);
> +	hmidi->output = NULL;
> +	spin_unlock_irq(&hmidi->lock);
> +
> +	return 0;
> +}
> +
> +static struct snd_rawmidi_ops snd_madifx_midi_output = {
> +	.open =		snd_madifx_midi_output_open,
> +	.close =	snd_madifx_midi_output_close,
> +	.trigger =	snd_madifx_midi_output_trigger,
> +};
> +
> +static struct snd_rawmidi_ops snd_madifx_midi_input = {
> +	.open =		snd_madifx_midi_input_open,
> +	.close =	snd_madifx_midi_input_close,
> +	.trigger =	snd_madifx_midi_input_trigger,
> +};
> +
> +static int snd_madifx_create_midi(struct snd_card *card,
> +					    struct mfx *mfx, int id)
> +{
> +	int err;
> +	char buf[32];
> +
> +	mfx->midi[id].id = id;
> +	mfx->midi[id].mfx = mfx;
> +	spin_lock_init(&mfx->midi[id].lock);
> +
> +	switch (id) {
> +	case 0:
> +		mfx->midi[0].dataIn = MADIFX_midi_in0_data;
> +		mfx->midi[0].statusIn = MADIFX_midi_in0_status;
> +		mfx->midi[0].dataOut = MADIFX_midi_out0_data;
> +		mfx->midi[0].statusOut = MADIFX_midi_out0_status;
> +		mfx->midi[0].ie = MADIFX_IEN0;
> +		mfx->midi[0].irq = MADIFX_mIRQ0;
> +		break;
> +
> +	case 1:
> +		mfx->midi[1].dataIn = MADIFX_midi_in1_data;
> +		mfx->midi[1].statusIn = MADIFX_midi_in1_status;
> +		mfx->midi[1].dataOut = MADIFX_midi_out1_data;
> +		mfx->midi[1].statusOut = MADIFX_midi_out1_status;
> +		mfx->midi[1].ie = MADIFX_IEN1;
> +		mfx->midi[1].irq = MADIFX_mIRQ1;
> +		break;
> +
> +	case 2:
> +		mfx->midi[2].dataIn = MADIFX_midi_in2_data;
> +		mfx->midi[2].statusIn = MADIFX_midi_in2_status;
> +		mfx->midi[2].dataOut = MADIFX_midi_out2_data;
> +		mfx->midi[2].statusOut = MADIFX_midi_out2_status;
> +		mfx->midi[2].ie = MADIFX_IEN2;
> +		mfx->midi[2].irq = MADIFX_mIRQ2;
> +		break;
> +
> +	case 3:
> +		mfx->midi[3].dataIn = MADIFX_midi_in3_data;
> +		mfx->midi[3].statusIn = MADIFX_midi_in3_status;
> +		mfx->midi[3].dataOut = MADIFX_midi_out3_data;
> +		mfx->midi[3].statusOut = MADIFX_midi_out3_status;
> +		mfx->midi[3].ie = MADIFX_IEN3;
> +		mfx->midi[3].irq = MADIFX_mIRQ3;

All these fields can be computed easily by an index, I suppose?



> +		break;
> +
> +	default:
> +		dev_err(mfx->card->dev,
> +				"MADIFX: Unknown MIDI port %i\n", id);
> +		return -EINVAL;
> +
> +	}
> +
> +	sprintf(buf, "%s MIDIoverMADI %d", card->shortname, id+1);
> +
> +	err = snd_rawmidi_new(card, buf, id, 1, 1,
> +			&mfx->midi[id].rmidi);
> +	if (err < 0)
> +		return err;
> +
> +	sprintf(mfx->midi[id].rmidi->name, "%s MIDI %d",
> +			card->id, id+1);
> +	mfx->midi[id].rmidi->private_data = &mfx->midi[id];
> +
> +	snd_rawmidi_set_ops(mfx->midi[id].rmidi,
> +			SNDRV_RAWMIDI_STREAM_OUTPUT,
> +			&snd_madifx_midi_output);
> +	snd_rawmidi_set_ops(mfx->midi[id].rmidi,
> +			SNDRV_RAWMIDI_STREAM_INPUT,
> +			&snd_madifx_midi_input);
> +
> +	mfx->midi[id].rmidi->info_flags |=
> +		SNDRV_RAWMIDI_INFO_OUTPUT |
> +		SNDRV_RAWMIDI_INFO_INPUT |
> +		SNDRV_RAWMIDI_INFO_DUPLEX;
> +
> +	return 0;
> +}
> +
> +
> +static void madifx_midi_tasklet(unsigned long arg)
> +{
> +	struct mfx *mfx = (struct mfx *)arg;
> +	int i = 0;
> +
> +	while (i < mfx->midiPorts) {
> +		if (mfx->midi[i].pending)
> +			snd_madifx_midi_input_read(&mfx->midi[i]);
> +
> +		i++;
> +	}
> +}
> +
> +
> +/*-----------------------------------------------------------------------------
> +  Status Interface
> +  ----------------------------------------------------------------------------*/
> +
> +/* get the system sample rate which is set */
> +
> +
> +/*
> + * Calculate the real sample rate from the
> + * current DDS value.
> + */
> +static int madifx_get_system_sample_rate(struct mfx *mfx)
> +{
> +	unsigned int period, rate;
> +
> +	period = madifx_read(mfx, MADIFX_RD_PLL_FREQ);
> +	rate = madifx_calc_dds_value(mfx, period) *
> +		madifx_speed_multiplier(mfx);
> +
> +	return rate;
> +}
> +
> +
> +#define HDSPM_SYSTEM_SAMPLE_RATE(xname, xindex) \
> +{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
> +	.name = xname, \
> +	.index = xindex, \
> +	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |\
> +		SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
> +	.info = snd_madifx_info_system_sample_rate, \
> +	.put = snd_madifx_put_system_sample_rate, \
> +	.get = snd_madifx_get_system_sample_rate \

Should this be a mixer interface?  That is, is it safe to allow every
mixer application changing this via the standard mixer API?

This question isn't only about this control but in general to each
special control.


> +}
> +
> +static int snd_madifx_info_system_sample_rate(struct snd_kcontrol *kcontrol,
> +					      struct snd_ctl_elem_info *uinfo)
> +{
> +	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
> +	uinfo->count = 1;
> +	uinfo->value.integer.min = 27000;
> +	uinfo->value.integer.max = 207000;
> +	uinfo->value.integer.step = 1;
> +	return 0;
> +}
> +
> +
> +static int snd_madifx_get_system_sample_rate(struct snd_kcontrol *kcontrol,
> +					     struct snd_ctl_elem_value *
> +					     ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +
> +	ucontrol->value.integer.value[0] = madifx_get_system_sample_rate(mfx);
> +	return 0;
> +}
> +
> +static int snd_madifx_put_system_sample_rate(struct snd_kcontrol *kcontrol,
> +					     struct snd_ctl_elem_value *
> +					     ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +
> +	madifx_set_dds_value(mfx, ucontrol->value.enumerated.item[0]);
> +	return 0;
> +}
> +
> +
> +
> +static int madifx_external_freq_index(struct mfx *mfx,
> +				      enum madifx_syncsource port)
> +{
> +	int i = 0;
> +	int freq0_bit;
> +	int inp_freq;
> +	int lock_bit;
> +	int inp_status;
> +
> +	inp_status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
> +	inp_freq = madifx_read(mfx, MADIFX_RD_INP_FREQ);
> +
> +	switch (port) {
> +	case syncsource_madi1:
> +		lock_bit = MADIFX_madi1_lock;
> +		freq0_bit = MADIFX_madi1_freq0;
> +		break;
> +	case syncsource_madi2:
> +		lock_bit = MADIFX_madi2_lock;
> +		freq0_bit = MADIFX_madi2_freq0;
> +		break;
> +	case syncsource_madi3:
> +		lock_bit = MADIFX_madi3_lock;
> +		freq0_bit = MADIFX_madi3_freq0;
> +		break;
> +	case syncsource_aes:
> +		lock_bit = MADIFX_aes_lock;
> +		freq0_bit = MADIFX_aes_freq0;
> +		break;
> +	case syncsource_wc:
> +		lock_bit = MADIFX_word_lock;
> +		freq0_bit = MADIFX_word_freq0;
> +		break;
> +	case syncsource_syncin:
> +		lock_bit = MADIFX_sync_in_lock;
> +		freq0_bit = MADIFX_sync_in_freq0;
> +		break;
> +	default:
> +		dev_err(mfx->card->dev,
> +				"MADIFX: Unknown external port ID %i\n", port);

Better to use snd_BUG_ON() or WARN_ON(), as this must be a programming
error.

> +		return 0;
> +	}
> +
> +	if (!(inp_status & lock_bit)) {
> +		i = 0;
> +	} else {
> +		int freq_bits = inp_freq & (freq0_bit*15);
> +
> +		if      (freq_bits == freq0_bit * 1)
> +			i = 1;
> +		else if (freq_bits == freq0_bit * 2)
> +			i = 2;
> +		else if (freq_bits == freq0_bit * 3)
> +			i = 3;
> +		else if (freq_bits == freq0_bit * 4)
> +			i = 4;
> +		else if (freq_bits == freq0_bit * 5)
> +			i = 5;
> +		else if (freq_bits == freq0_bit * 6)
> +			i = 6;
> +		else if (freq_bits == freq0_bit * 7)
> +			i = 7;
> +		else if (freq_bits == freq0_bit * 8)
> +			i = 8;
> +		else if (freq_bits == freq0_bit * 9)
> +			i = 9;
> +		else
> +			i = 0;
> +	}
> +	return i;
> +}
> +
> +
> +#define ENUMERATED_CTL_INFO(info, texts) \
> +	snd_ctl_enum_info(info, 1, ARRAY_SIZE(texts), texts)
> +
> +#define HDSPM_AUTOSYNC_SAMPLE_RATE(xname, xindex) \
> +{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
> +	.name = xname, \
> +	.private_value = xindex, \
> +	.access = SNDRV_CTL_ELEM_ACCESS_READ, \
> +	.info = snd_madifx_info_autosync_sample_rate, \
> +	.get = snd_madifx_get_autosync_sample_rate \
> +}
> +
> +
> +static int snd_madifx_info_autosync_sample_rate(struct snd_kcontrol *kcontrol,
> +					       struct snd_ctl_elem_info *uinfo)
> +{
> +	ENUMERATED_CTL_INFO(uinfo, texts_freq);
> +
> +	return 0;
> +}
> +
> +
> +static int snd_madifx_get_autosync_sample_rate(struct snd_kcontrol *kcontrol,
> +					      struct snd_ctl_elem_value *
> +					      ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		ucontrol->value.enumerated.item[0] =
> +			madifx_external_freq_index(mfx,
> +						   kcontrol->private_value);
> +		break;
> +
> +	default:
> +		break;
> +	}
> +
> +	return 0;
> +}
> +
> +#define MADIFX_MADI_CHANNELCOUNT(xname, xindex) \
> +{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
> +	.name = xname, \
> +	.private_value = xindex, \
> +	.access = SNDRV_CTL_ELEM_ACCESS_READ, \
> +	.info = snd_madifx_info_channelcount, \
> +	.get = snd_madifx_get_channelcount \
> +}
> +
> +
> +static int snd_madifx_info_channelcount(struct snd_kcontrol *kcontrol,
> +					       struct snd_ctl_elem_info *uinfo)
> +{
> +	static const char *const texts[] = { "64", "56", "32", "28", "16",
> +		"14", "No lock" };
> +
> +	ENUMERATED_CTL_INFO(uinfo, texts);
> +	return 0;
> +}
> +
> +static int madifx_get_madichannelcount(struct mfx *mfx, int idx)
> +{
> +	int rate_index;
> +	int i = 0;
> +	int inp_status;
> +	int rx_64ch_bit = (MADIFX_madi1_rx_64ch << idx);
> +
> +	inp_status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
> +
> +
> +	/* Check for speed. If rate_index is zero, there's no lock */
> +	rate_index = madifx_external_freq_index(mfx, idx);
> +	if (0 == rate_index)
> +		i = 6;
> +	else {
> +		if (inp_status & rx_64ch_bit)
> +			i = 0;
> +		else
> +			i = 1;
> +
> +		/* I know this is ugly */
> +		if (rate_index > 3)
> +			i += 2; /* Double speed */
> +		if (rate_index > 6)
> +			i += 2; /* Quad speed */
> +	}
> +
> +	return i;
> +
> +}
> +
> +
> +static int snd_madifx_get_channelcount(struct snd_kcontrol *kcontrol,
> +					      struct snd_ctl_elem_value *
> +					      ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +	int idx = kcontrol->private_value;
> +
> +
> +	ucontrol->value.enumerated.item[0] =
> +		madifx_get_madichannelcount(mfx, idx);
> +
> +	return 0;
> +}
> +
> +
> +
> +/*
> + * Returns the system clock mode for the given card.
> + * @returns 0 - master, 1 - slave
> + */
> +static int madifx_system_clock_mode(struct mfx *mfx)
> +{
> +	u32 status;
> +
> +	status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
> +	if ((status & (MADIFX_SelSyncRef0 * 7)) == (MADIFX_SelSyncRef0 * 7))
> +		return 0;
> +
> +	return 1;
> +}
> +
> +
> +#define HDSPM_INTERNAL_CLOCK(xname, xindex) \
> +{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
> +	.name = xname, \
> +	.index = xindex, \
> +	.info = snd_madifx_info_clock_source, \
> +	.get = snd_madifx_get_clock_source, \
> +	.put = snd_madifx_put_clock_source \
> +}
> +
> +
> +static int madifx_clock_source(struct mfx *mfx)
> +{
> +	switch (mfx->system_sample_rate) {
> +	case 32000: return 0;
> +	case 44100: return 1;
> +	case 48000: return 2;
> +	case 64000: return 3;
> +	case 88200: return 4;
> +	case 96000: return 5;
> +	case 128000: return 6;
> +	case 176400: return 7;
> +	case 192000: return 8;
> +	}
> +
> +	return -1;
> +}

This has the relation with HDSPM_bit2freq()?


> +static int madifx_set_clock_source(struct mfx *mfx, int mode)
> +{
> +	int rate;
> +
> +	switch (mode) {
> +	case 0:
> +		rate = 32000; break;
> +	case 1:
> +		rate = 44100; break;
> +	case 2:
> +		rate = 48000; break;
> +	case 3:
> +		rate = 64000; break;
> +	case 4:
> +		rate = 88200; break;
> +	case 5:
> +		rate = 96000; break;
> +	case 6:
> +		rate = 128000; break;
> +	case 7:
> +		rate = 176400; break;
> +	case 8:
> +		rate = 192000; break;
> +	default:
> +		rate = 48000;

Ditto.


> +	}
> +	madifx_set_rate(mfx, rate, 1);
> +	return 0;
> +}
> +
> +static int snd_madifx_info_clock_source(struct snd_kcontrol *kcontrol,
> +				       struct snd_ctl_elem_info *uinfo)
> +{
> +	return snd_ctl_enum_info(uinfo, 1, 9, texts_freq + 1);
> +}
> +
> +static int snd_madifx_get_clock_source(struct snd_kcontrol *kcontrol,
> +				      struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +
> +	ucontrol->value.enumerated.item[0] = madifx_clock_source(mfx);
> +	return 0;
> +}
> +
> +static int snd_madifx_put_clock_source(struct snd_kcontrol *kcontrol,
> +				      struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +	int change;
> +	int val;
> +
> +	if (!snd_madifx_use_is_exclusive(mfx))
> +		return -EBUSY;
> +	val = ucontrol->value.enumerated.item[0];
> +	if (val < 0)
> +		val = 0;
> +	if (val > 9)
> +		val = 9;
> +	spin_lock_irq(&mfx->lock);
> +	if (val != madifx_clock_source(mfx))
> +		change = (madifx_set_clock_source(mfx, val) == 0) ? 1 : 0;
> +	else
> +		change = 0;
> +	spin_unlock_irq(&mfx->lock);
> +	return change;
> +}
> +
> +
> +static int madifx_get_clock_select(struct mfx *mfx)
> +{
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		{
> +			int i;
> +			u32 status;
> +
> +			status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
> +
> +			switch (status & (MADIFX_SelSyncRef0 * 7)) {
> +			case MADIFX_SelSyncRef0 * 0:
> +				i = 0; break;
> +			case MADIFX_SelSyncRef0 * 1:
> +				i = 1; break;
> +			case MADIFX_SelSyncRef0 * 2:
> +				i = 2; break;
> +			case MADIFX_SelSyncRef0 * 3:
> +				i = 3; break;
> +			case MADIFX_SelSyncRef0 * 4:
> +				i = 4; break;
> +			case MADIFX_SelSyncRef0 * 5:
> +				i = 5; break;
> +			case MADIFX_SelSyncRef0 * 6:
> +				i = 6; break;
> +			default:
> +						     /* We are master */
> +						     i = 0;
> +						     break;

This doesn't look smart...  Why not just mask & shift?


> +			}
> +			return i;
> +		}
> +		break;
> +	default:
> +		break;
> +	}
> +
> +	return -1;
> +}
> +
> +static int madifx_set_clock_select(struct mfx *mfx, int val)
> +{
> +	mfx->settings_register &= ~MADIFX_SyncRefMask;
> +	mfx->settings_register |= MADIFX_SyncRef0 * val;
> +	madifx_write(mfx, MADIFX_SETTINGS_REG, mfx->settings_register);
> +
> +	if (val > 0) {
> +		/* switched to slave mode */
> +		mfx->system_sample_rate = madifx_get_external_rate(mfx);
> +	}
> +
> +	return 0;
> +}
> +
> +
> +
> +#define MADIFX_CLOCK_SELECT(xname, xindex) \
> +{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
> +	.name = xname, \
> +	.index = xindex, \
> +	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |\
> +			SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
> +	.info = snd_madifx_info_clock_select, \
> +	.get = snd_madifx_get_clock_select, \
> +	.put = snd_madifx_put_clock_select \
> +}
> +
> +
> +static int snd_madifx_info_clock_select(struct snd_kcontrol *kcontrol,
> +					struct snd_ctl_elem_info *uinfo)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +
> +	snd_ctl_enum_info(uinfo, 1, mfx->texts_clocksource_items,
> +			mfx->texts_clocksource);
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_get_clock_select(struct snd_kcontrol *kcontrol,
> +				       struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +	int psf = madifx_get_clock_select(mfx);
> +
> +	if (psf >= 0) {
> +		ucontrol->value.enumerated.item[0] = psf;
> +		return 0;
> +	}
> +
> +	return -1;
> +}
> +
> +static int snd_madifx_put_clock_select(struct snd_kcontrol *kcontrol,
> +				       struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +	int val, change = 0;
> +
> +	if (!snd_madifx_use_is_exclusive(mfx))
> +		return -EBUSY;
> +
> +	val = ucontrol->value.enumerated.item[0];
> +
> +	if (val < 0)
> +		val = 0;
> +	else if (val >= mfx->texts_clocksource_items)
> +		val = mfx->texts_clocksource_items-1;
> +
> +	spin_lock_irq(&mfx->lock);
> +	if (val != madifx_get_clock_select(mfx))
> +		change = (0 == madifx_set_clock_select(mfx, val)) ? 1 : 0;
> +
> +	spin_unlock_irq(&mfx->lock);
> +	return change;
> +}
> +
> +
> +
> +#define MADIFX_TOGGLE_SETTING(xname, xindex) \
> +{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
> +	.name = xname, \
> +	.private_value = xindex, \
> +	.info = snd_madifx_info_toggle_setting, \
> +	.get = snd_madifx_get_toggle_setting, \
> +	.put = snd_madifx_put_toggle_setting \
> +}
> +
> +static int madifx_read_toggle_setting(struct mfx *mfx, u32 reg)
> +{
> +	return (mfx->settings_register & (reg)) ? 1 : 0;
> +}
> +
> +static int madifx_set_toggle_setting(struct mfx *mfx, u32 reg, int out)
> +{
> +	if (out)
> +		mfx->settings_register |= (reg);
> +	else
> +		mfx->settings_register &= ~(reg);
> +	madifx_write(mfx, MADIFX_SETTINGS_REG, mfx->settings_register);
> +
> +	return 0;
> +}
> +
> +#define snd_madifx_info_toggle_setting		snd_ctl_boolean_mono_info
> +
> +static int snd_madifx_get_toggle_setting(struct snd_kcontrol *kcontrol,
> +			       struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +
> +	spin_lock_irq(&mfx->lock);
> +	ucontrol->value.integer.value[0] = madifx_read_toggle_setting(mfx,
> +			kcontrol->private_value);
> +	spin_unlock_irq(&mfx->lock);
> +	return 0;
> +}
> +
> +static int snd_madifx_put_toggle_setting(struct snd_kcontrol *kcontrol,
> +			       struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +	int change;
> +	u32 reg = kcontrol->private_value;
> +	unsigned int val;
> +
> +	if (!snd_madifx_use_is_exclusive(mfx))
> +		return -EBUSY;
> +	val = ucontrol->value.integer.value[0] & 1;
> +	spin_lock_irq(&mfx->lock);
> +	change = (int) val != madifx_read_toggle_setting(mfx, reg);
> +	madifx_set_toggle_setting(mfx, reg, val);
> +	spin_unlock_irq(&mfx->lock);
> +	return change;
> +}
> +
> +
> +
> +#define HDSPM_MIXER(xname, xindex) \
> +{	.iface = SNDRV_CTL_ELEM_IFACE_HWDEP, \
> +	.name = xname, \
> +	.index = xindex, \
> +	.device = 0, \
> +	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | \
> +		SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
> +	.info = snd_madifx_info_mixer, \
> +	.get = snd_madifx_get_mixer, \
> +	.put = snd_madifx_put_mixer \
> +}
> +
> +#define HDSPM_SYNC_CHECK(xname, xindex) \
> +{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
> +	.name = xname, \
> +	.private_value = xindex, \
> +	.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
> +	.info = snd_madifx_info_sync_check, \
> +	.get = snd_madifx_get_sync_check \
> +}
> +
> +
> +static int snd_madifx_info_sync_check(struct snd_kcontrol *kcontrol,
> +				     struct snd_ctl_elem_info *uinfo)
> +{
> +	static const char *const texts[] = { "No Lock", "Lock", "Sync", "N/A" };
> +
> +	ENUMERATED_CTL_INFO(uinfo, texts);
> +	return 0;
> +}
> +
> +
> +static int madifx_sync_check(struct mfx *mfx, enum madifx_syncsource idx)
> +{
> +	u32 status, lockmask, syncmask;
> +	int lock, sync;
> +
> +	status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
> +
> +	switch (idx) {
> +	case syncsource_syncin:
> +		/* Sync-In */
> +		lockmask = MADIFX_sync_in_lock;
> +		syncmask = MADIFX_sync_in_sync;
> +		break;
> +	case syncsource_aes:
> +		/* AES */
> +		lockmask = MADIFX_aes_lock;
> +		syncmask = MADIFX_aes_sync;
> +		break;
> +	case syncsource_wc:
> +		/* WC */
> +		lockmask = MADIFX_word_lock;
> +		syncmask = MADIFX_word_sync;
> +		break;
> +	default:
> +		lockmask = (MADIFX_madi1_lock << idx);
> +		syncmask = (MADIFX_madi1_sync << idx);
> +		break;
> +	}
> +
> +	lock = (status & lockmask) ? 1 : 0;
> +	sync = (status & syncmask) ? 1 : 0;
> +
> +	if (lock && sync)
> +		return 2;
> +	else if (lock)
> +		return 1;
> +	return 0;
> +}
> +
> +
> +
> +
> +static int snd_madifx_get_sync_check(struct snd_kcontrol *kcontrol,
> +				    struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct mfx *mfx = snd_kcontrol_chip(kcontrol);
> +	int val = -1;
> +
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		val = madifx_sync_check(mfx, kcontrol->private_value);
> +		break;
> +	}
> +
> +	if (-1 == val)
> +		val = 3;
> +
> +	ucontrol->value.enumerated.item[0] = val;
> +	return 0;
> +}
> +
> +
> +
> +static struct snd_kcontrol_new snd_madifx_controls_madi[] = {
> +	HDSPM_SYSTEM_SAMPLE_RATE("System Sample Rate", 0),
> +	HDSPM_INTERNAL_CLOCK("Internal Clock", 0),
> +	HDSPM_SYNC_CHECK("MADI 1 SyncCheck", syncsource_madi1),
> +	HDSPM_SYNC_CHECK("MADI 2 SyncCheck", syncsource_madi2),
> +	HDSPM_SYNC_CHECK("MADI 3 SyncCheck", syncsource_madi3),
> +	HDSPM_SYNC_CHECK("WC SyncCheck", syncsource_wc),
> +	HDSPM_SYNC_CHECK("AES SyncCheck", syncsource_aes),
> +	HDSPM_SYNC_CHECK("Sync-In SyncCheck", syncsource_syncin),
> +	HDSPM_AUTOSYNC_SAMPLE_RATE("MADI 1 Frequency", syncsource_madi1),
> +	HDSPM_AUTOSYNC_SAMPLE_RATE("MADI 2 Frequency", syncsource_madi2),
> +	HDSPM_AUTOSYNC_SAMPLE_RATE("MADI 3 Frequency", syncsource_madi3),
> +	HDSPM_AUTOSYNC_SAMPLE_RATE("WC Frequency", syncsource_wc),
> +	HDSPM_AUTOSYNC_SAMPLE_RATE("AES Frequency", syncsource_aes),
> +	HDSPM_AUTOSYNC_SAMPLE_RATE("Sync-In Frequency", syncsource_syncin),
> +	MADIFX_MADI_CHANNELCOUNT("MADI 1 RX #ch", 0),
> +	MADIFX_MADI_CHANNELCOUNT("MADI 2 RX #ch", 1),
> +	MADIFX_MADI_CHANNELCOUNT("MADI 3 RX #ch", 2),
> +	MADIFX_TOGGLE_SETTING("MADI 1 TX 64ch mode", MADIFX_madi1_tx_64ch),
> +	MADIFX_TOGGLE_SETTING("MADI 2 TX 64ch mode", MADIFX_madi2_tx_64ch),
> +	MADIFX_TOGGLE_SETTING("MADI 3 TX 64ch mode", MADIFX_madi3_tx_64ch),
> +	MADIFX_TOGGLE_SETTING("MADI 1 SMUX mode", MADIFX_madi1_smux),
> +	MADIFX_TOGGLE_SETTING("MADI 2 SMUX mode", MADIFX_madi2_smux),
> +	MADIFX_TOGGLE_SETTING("MADI 3 SMUX mode", MADIFX_madi3_smux),
> +	MADIFX_TOGGLE_SETTING("WC Term", MADIFX_WCK_TERM),
> +	MADIFX_TOGGLE_SETTING("WC single speed", MADIFX_WCK48),
> +	MADIFX_TOGGLE_SETTING("AES professional", MADIFX_PRO),
> +	MADIFX_TOGGLE_SETTING("Redundancy mode", MADIFX_redundancy_mode),
> +	MADIFX_TOGGLE_SETTING("Mirror MADI out", MADIFX_mirror_madi_out),
> +	MADIFX_CLOCK_SELECT("Clock Selection", 0)
> +};
> +
> +
> +static int snd_madifx_create_controls(struct snd_card *card,
> +					struct mfx *mfx)
> +{
> +	unsigned int idx, limit;
> +	int err;
> +	struct snd_kcontrol_new *list = NULL;
> +
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		list = snd_madifx_controls_madi;
> +		limit = ARRAY_SIZE(snd_madifx_controls_madi);
> +		break;
> +	}
> +
> +	if (NULL != list) {
> +		for (idx = 0; idx < limit; idx++) {
> +			err = snd_ctl_add(card,
> +					snd_ctl_new1(&list[idx], mfx));
> +			if (err < 0)
> +				return err;
> +		}
> +	}
> +
> +	/* FIXME: If there'll ever be an ALSA mixer for MADIFX, you want to
> +	 * create the corresponding controls here.
> +	 */
> +	return 0;
> +}
> +
> +/*------------------------------------------------------------
> +   /proc interface
> + ------------------------------------------------------------*/
> +
> +static void
> +snd_madifx_proc_read_madifx(struct snd_info_entry *entry,
> +			 struct snd_info_buffer *buffer)
> +{
> +	struct mfx *mfx = entry->private_data;
> +	u32 status, inp_status, control, freq;
> +
> +	char *system_clock_mode;
> +	int x;
> +
> +	unsigned int period;
> +	u64 freq_const = 0;
> +	u32 rate;
> +
> +	status = madifx_read(mfx, MADIFX_RD_STATUS);
> +	inp_status = madifx_read(mfx, MADIFX_RD_INP_STATUS);
> +	control = mfx->control_register;
> +	freq = madifx_read(mfx, MADIFX_RD_INP_FREQ);
> +
> +#if 0
> +	snd_iprintf(buffer, "%s (Card #%d) Rev.%x Status2first3bits: %x\n",
> +			mfx->card_name, mfx->card->number + 1,
> +			mfx->firmware_rev,
> +			(status2 & HDSPM_version0) |
> +			(status2 & HDSPM_version1) | (status2 &
> +				HDSPM_version2));
> +#endif
> +	snd_iprintf(buffer, "HW Serial: 0x%x\n", madifx_read(mfx,
> +				MADIFX_RD_VERSION));
> +
> +	snd_iprintf(buffer, "IRQ: %d Registers bus: 0x%lx VM: 0x%lx\n",
> +			mfx->irq, mfx->port, (unsigned long)mfx->iobase);
> +
> +	snd_iprintf(buffer, "--- System ---\n");
> +
> +	snd_iprintf(buffer,
> +		"IRQ Pending: Audio=%d, MIDI0=%d, MIDI1=%d, MIDI2=%d MIDI3=%d IRQcount=%d\n",
> +		status & HDSPM_audioIRQPending,
> +		(status & MADIFX_mIRQ0) ? 1 : 0,
> +		(status & MADIFX_mIRQ1) ? 1 : 0,
> +		(status & MADIFX_mIRQ2) ? 1 : 0,
> +		(status & MADIFX_mIRQ3) ? 1 : 0,
> +		mfx->irq_count);
> +
> +	snd_iprintf(buffer,
> +		"MIDI FIFO: Out0=0x%x, Out1=0x%x, Out2=0x%x, Out3=0x%x\n",
> +		madifx_read(mfx, MADIFX_midi_out0_status) & 0xFF,
> +		madifx_read(mfx, MADIFX_midi_out1_status) & 0xFF,
> +		madifx_read(mfx, MADIFX_midi_out2_status) & 0xFF,
> +		madifx_read(mfx, MADIFX_midi_out3_status) & 0xFF);
> +	snd_iprintf(buffer,
> +		"MIDI FIFO: in0=0x%x, in1=0x%x, in2=0x%x, in3=0x%x\n",
> +		madifx_read(mfx, MADIFX_midi_in0_status) & 0xFF,
> +		madifx_read(mfx, MADIFX_midi_in1_status) & 0xFF,
> +		madifx_read(mfx, MADIFX_midi_in2_status) & 0xFF,
> +		madifx_read(mfx, MADIFX_midi_in3_status) & 0xFF);
> +	snd_iprintf(buffer,
> +		"Register:\ncontrol=0x%x, settings=0x%x, status=0x%x, input=0x%x inp_freq=0x%x\n",
> +		mfx->control_register, mfx->settings_register,
> +		status, inp_status, freq);
> +
> +		switch (mfx->io_type) {
> +		case MADIFX:
> +			freq_const = 131072000000000ULL;
> +			break;
> +		}
> +
> +		period = madifx_read(mfx, MADIFX_RD_PLL_FREQ);
> +		snd_iprintf(buffer, "    period: %u\n", period);
> +
> +
> +		/* rate = freq_const/period; */
> +		rate = div_u64(freq_const, period);
> +
> +		rate *= madifx_speed_multiplier(mfx);
> +
> +
> +		snd_iprintf(buffer, "  Frequency: %u Hz\n",
> +				(unsigned int) rate);
> +
> +
> +	snd_iprintf(buffer, "--- Settings ---\n");
> +
> +	x = madifx_get_latency(mfx);
> +
> +	snd_iprintf(buffer,
> +		"Size (Latency): %d samples\n", x);
> +
> +	if (1 == madifx_system_clock_mode(mfx))
> +		system_clock_mode = "Slave";
> +	else
> +		system_clock_mode = "Master";
> +	snd_iprintf(buffer, "AutoSync Reference: %s\n", system_clock_mode);
> +
> +	snd_iprintf(buffer, "Selected clock source: %s\n",
> +		mfx->texts_clocksource[madifx_get_clock_select(mfx)]);
> +
> +	snd_iprintf(buffer, "System Clock Frequency: %d\n",
> +			mfx->system_sample_rate);
> +
> +	snd_iprintf(buffer, "\n");
> +}
> +
> +
> +#ifdef CONFIG_SND_DEBUG
> +static void
> +snd_madifx_proc_read_debug(struct snd_info_entry *entry,
> +			  struct snd_info_buffer *buffer)
> +{
> +	struct mfx *mfx = entry->private_data;
> +
> +	int j, i;
> +
> +	for (i = 0; i < 256 /* 1024*64 */; i += j) {
> +		snd_iprintf(buffer, "0x%08X: ", i);
> +		for (j = 0; j < 16; j += 4)
> +			snd_iprintf(buffer, "%08X ", madifx_read(mfx, i + j));
> +		snd_iprintf(buffer, "\n");
> +	}
> +}
> +#endif
> +
> +
> +#if 0
> +/* FIXME: Portnames not implemented, yet. mfx->port_names_in and _out are
> + * set to NULL, so don't derefence them for the time being.
> + */
> +static void snd_madifx_proc_ports_in(struct snd_info_entry *entry,
> +			  struct snd_info_buffer *buffer)
> +{
> +	struct mfx *mfx = entry->private_data;
> +	int i;
> +
> +	snd_iprintf(buffer, "# generated by mfx\n");
> +
> +	for (i = 0; i < mfx->max_channels_in; i++)
> +		snd_iprintf(buffer, "%d=%s\n", i+1, mfx->port_names_in[i]);
> +}
> +
> +static void snd_madifx_proc_ports_out(struct snd_info_entry *entry,
> +			  struct snd_info_buffer *buffer)
> +{
> +	struct mfx *mfx = entry->private_data;
> +	int i;
> +
> +	snd_iprintf(buffer, "# generated by mfx\n");
> +
> +	for (i = 0; i < mfx->max_channels_out; i++)
> +		snd_iprintf(buffer, "%d=%s\n", i+1, mfx->port_names_out[i]);
> +}
> +#endif
> +
> +
> +static void snd_madifx_proc_init(struct mfx *mfx)
> +{
> +	struct snd_info_entry *entry;
> +
> +	if (!snd_card_proc_new(mfx->card, "madifx", &entry)) {
> +		switch (mfx->io_type) {
> +		case MADIFX:
> +			snd_info_set_text_ops(entry, mfx,
> +					snd_madifx_proc_read_madifx);
> +			break;
> +		}
> +	}
> +
> +#if 0
> +	/* FIXME: port names still missing for MADIFX */
> +	if (!snd_card_proc_new(mfx->card, "ports.in", &entry))
> +		snd_info_set_text_ops(entry, mfx, snd_madifx_proc_ports_in);
> +
> +	if (!snd_card_proc_new(mfx->card, "ports.out", &entry))
> +		snd_info_set_text_ops(entry, mfx, snd_madifx_proc_ports_out);
> +#endif
> +
> +#ifdef CONFIG_SND_DEBUG
> +	/* debug file to read all mfx registers */
> +	if (!snd_card_proc_new(mfx->card, "debug", &entry))
> +		snd_info_set_text_ops(entry, mfx,
> +				snd_madifx_proc_read_debug);
> +#endif
> +}
> +
> +/*------------------------------------------------------------
> +   mfx intitialize
> + ------------------------------------------------------------*/
> +
> +static int snd_madifx_set_defaults(struct mfx *mfx)
> +{
> +	/* ASSUMPTION: mfx->lock is either held, or there is no need to
> +	   hold it (e.g. during module initialization).
> +	   */
> +
> +	/* set defaults:       */
> +
> +	mfx->settings_register = 0;
> +
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		/* OSX: LAT_3+BUF_SIZ_1+BUF_SIZ_2+freq1; */
> +		mfx->control_register = MADIFX_LAT_3 + MADIFX_BUF_SIZ_1 +
> +			MADIFX_BUF_SIZ_2 + MADIFX_freq1;
> +		/* PRO+madi1_tx_64ch+madi2_tx_64ch+madi3_tx_64ch; */
> +		mfx->settings_register = 0x8 + 0x80 + 0x100 + 0x200;
> +		break;
> +	}
> +
> +	madifx_write(mfx, MADIFX_CONTROL_REG, mfx->control_register);
> +
> +	madifx_compute_period_size(mfx);
> +
> +	madifx_write(mfx, MADIFX_SETTINGS_REG, mfx->settings_register);
> +
> +	/* set a default rate so that the channel map is set up. */
> +	madifx_set_rate(mfx, 48000, 1);
> +
> +	return 0;
> +}
> +
> +
> +/*------------------------------------------------------------
> +   interrupt
> + ------------------------------------------------------------*/
> +
> +static irqreturn_t snd_madifx_interrupt(int irq, void *dev_id)
> +{
> +	struct mfx *mfx = (struct mfx *) dev_id;
> +	unsigned int status;
> +	int i, audio, midi, schedule = 0;
> +	/* cycles_t now; */
> +
> +	status = madifx_read(mfx, MADIFX_RD_STATUS);
> +
> +	audio = status & HDSPM_audioIRQPending;
> +	midi = status & (MADIFX_mIRQ0 | MADIFX_mIRQ1 |
> +			MADIFX_mIRQ2 | MADIFX_mIRQ3);
> +
> +	/* now = get_cycles(); */
> +	/*
> +	 *   LAT_2..LAT_0 period  counter (win)  counter (mac)
> +	 *          6       4096   ~256053425     ~514672358
> +	 *          5       2048   ~128024983     ~257373821
> +	 *          4       1024    ~64023706     ~128718089
> +	 *          3        512    ~32005945      ~64385999
> +	 *          2        256    ~16003039      ~32260176
> +	 *          1        128     ~7998738      ~16194507
> +	 *          0         64     ~3998231       ~8191558
> +	 */
> +	/*
> +	   snd_printk(KERN_INFO "snd_madifx_interrupt %llu @ %llx\n",
> +	   now-mfx->last_interrupt, status & 0xFFC0);
> +	   mfx->last_interrupt = now;
> +	*/
> +
> +	if (!audio && !midi)
> +		return IRQ_NONE;
> +
> +	madifx_write(mfx, MADIFX_IRQ_ACK, 0);
> +	mfx->irq_count++;
> +
> +
> +	if (audio) {
> +		if (mfx->capture_substream)
> +			snd_pcm_period_elapsed(mfx->capture_substream);
> +
> +		if (mfx->playback_substream)
> +			snd_pcm_period_elapsed(mfx->playback_substream);
> +	}
> +
> +	if (midi) {
> +		i = 0;
> +		while (i < mfx->midiPorts) {
> +			if ((madifx_read(mfx,
> +				mfx->midi[i].statusIn) & 0xff) &&
> +					(status & mfx->midi[i].irq)) {
> +				/* we disable interrupts for this input until
> +				 * processing is done
> +				 */
> +				mfx->control_register &= ~mfx->midi[i].ie;
> +				madifx_write(mfx, MADIFX_CONTROL_REG,
> +						mfx->control_register);
> +				mfx->midi[i].pending = 1;
> +				schedule = 1;
> +			}
> +
> +			i++;
> +		}
> +
> +		if (schedule)
> +			tasklet_hi_schedule(&mfx->midi_tasklet);
> +	}
> +
> +	return IRQ_HANDLED;
> +}
> +
> +/*------------------------------------------------------------
> +   pcm interface
> +  ------------------------------------------------------------*/
> +
> +
> +static snd_pcm_uframes_t snd_madifx_hw_pointer(struct snd_pcm_substream
> +					      *substream)
> +{
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +
> +	return madifx_hw_pointer(mfx);
> +}
> +
> +
> +static int snd_madifx_reset(struct snd_pcm_substream *substream)
> +{
> +	struct snd_pcm_runtime *runtime = substream->runtime;
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +	struct snd_pcm_substream *other;
> +
> +	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
> +		other = mfx->capture_substream;
> +	else
> +		other = mfx->playback_substream;
> +
> +	if (mfx->running)
> +		runtime->status->hw_ptr = madifx_hw_pointer(mfx);
> +	else
> +		runtime->status->hw_ptr = 0;
> +	if (other) {
> +		struct snd_pcm_substream *s;
> +		struct snd_pcm_runtime *oruntime = other->runtime;
> +
> +		snd_pcm_group_for_each_entry(s, substream) {
> +			if (s == other) {
> +				oruntime->status->hw_ptr =
> +					runtime->status->hw_ptr;
> +				break;
> +			}
> +		}
> +	}
> +	return 0;
> +}
> +
> +static int snd_madifx_hw_params(struct snd_pcm_substream *substream,
> +			       struct snd_pcm_hw_params *params)
> +{
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +	int err;
> +	int i;
> +	pid_t this_pid;
> +	pid_t other_pid;
> +
> +	spin_lock_irq(&mfx->lock);
> +
> +	if (substream->pstr->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> +		this_pid = mfx->playback_pid;
> +		other_pid = mfx->capture_pid;
> +	} else {
> +		this_pid = mfx->capture_pid;
> +		other_pid = mfx->playback_pid;
> +	}
> +
> +	if (other_pid > 0 && this_pid != other_pid) {
> +
> +		/* The other stream is open, and not by the same
> +		   task as this one. Make sure that the parameters
> +		   that matter are the same.
> +		   */
> +
> +		if (params_rate(params) != mfx->system_sample_rate) {
> +			spin_unlock_irq(&mfx->lock);
> +			_snd_pcm_hw_param_setempty(params,
> +					SNDRV_PCM_HW_PARAM_RATE);
> +			return -EBUSY;
> +		}
> +
> +		if (params_period_size(params) != mfx->period_bytes / 4) {
> +			spin_unlock_irq(&mfx->lock);
> +			_snd_pcm_hw_param_setempty(params,
> +					SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
> +			return -EBUSY;
> +		}
> +
> +	}
> +	/* We're fine. */
> +	spin_unlock_irq(&mfx->lock);
> +
> +	/* how to make sure that the rate matches an externally-set one ?   */
> +
> +	spin_lock_irq(&mfx->lock);
> +	err = madifx_set_rate(mfx, params_rate(params), 0);
> +	if (err < 0) {
> +		dev_info(mfx->card->dev, "err on madifx_set_rate: %d\n", err);
> +		spin_unlock_irq(&mfx->lock);
> +		_snd_pcm_hw_param_setempty(params,
> +				SNDRV_PCM_HW_PARAM_RATE);
> +		return err;
> +	}
> +	spin_unlock_irq(&mfx->lock);
> +
> +	err = madifx_set_interrupt_interval(mfx,
> +			params_period_size(params));
> +	if (err < 0) {
> +		dev_info(mfx->card->dev,
> +			"err on madifx_set_interrupt_interval: %d\n", err);
> +		_snd_pcm_hw_param_setempty(params,
> +				SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
> +		return err;
> +	}
> +
> +	/* Memory allocation */
> +#define NUM_AES_PAGES (32768*2/4096)
> +#define NUM_MADI_PAGES (32768*192/4096)
> +#define NUM_DMA_CH_PAGES (32768*8/4096)
> +#define MADIFX_HW_PAGE_SIZE 4096
> +
> +	{
> +		int wanted;
> +
> +		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
> +			wanted = OUTPUT_DMA_BUFFER_SIZE;
> +		else
> +			wanted = INPUT_DMA_BUFFER_SIZE;
> +
> +		err = snd_pcm_lib_malloc_pages(substream, wanted);
> +		if (err < 0) {
> +			dev_info(mfx->card->dev,
> +			    "err on snd_pcm_lib_malloc_pages: %d\n", err);
> +			return err;
> +		}
> +	}
> +
> +	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> +
> +		/* initialise default DMA table. Will be
> +		 * overwritten in a second. */
> +		for (i = 0; i < MADIFX_MAX_PAGE_TABLE_SIZE/2; i++)
> +			mfx->dmaPageTable[i] =
> +					snd_pcm_sgbuf_get_addr(substream, 0);
> +
> +		/* AES Out, stereo */
> +		for (i = 0; i < NUM_AES_PAGES; i++)
> +			mfx->dmaPageTable[i] =
> +					snd_pcm_sgbuf_get_addr(substream,
> +					i * MADIFX_HW_PAGE_SIZE);
> +
> +		/* Phones Out, stereo */
> +		for (i = 0; i < NUM_AES_PAGES; i++)
> +			mfx->dmaPageTable[i+1*NUM_DMA_CH_PAGES] =
> +				snd_pcm_sgbuf_get_addr(substream,
> +					(i+1*NUM_AES_PAGES) *
> +					MADIFX_HW_PAGE_SIZE);
> +
> +		/* MADI Out, 192 channels */
> +		for (i = 0; i < NUM_MADI_PAGES; i++)
> +			mfx->dmaPageTable[i+2*NUM_DMA_CH_PAGES] =
> +				snd_pcm_sgbuf_get_addr(substream,
> +						(i+2*NUM_AES_PAGES) *
> +						MADIFX_HW_PAGE_SIZE);
> +
> +		for (i = 0; i < MADIFX_MAX_PAGE_TABLE_SIZE/2; i++)
> +			madifx_write(mfx, MADIFX_PAGE_ADDRESS_LIST + (4 * i),
> +					mfx->dmaPageTable[i]);
> +
> +		for (i = 0; i < 32; ++i)
> +			snd_madifx_enable_out(mfx, i, 1);
> +
> +		mfx->playback_buffer =
> +			(unsigned char *) substream->runtime->dma_area;
> +		snd_printdd("Allocated sample buffer for playback at %p\n",
> +				mfx->playback_buffer);
> +	} else {
> +		/* initialise default DMA table. Will be
> +		 * overwritten in a second. */
> +		for (i = MADIFX_MAX_PAGE_TABLE_SIZE/2;
> +				i < MADIFX_MAX_PAGE_TABLE_SIZE; i++) {
> +			mfx->dmaPageTable[i] =
> +					snd_pcm_sgbuf_get_addr(substream, 0);
> +		}
> +
> +		/* setup DMA page table */
> +		/* AES In, stereo */
> +		for (i = 0; i < NUM_AES_PAGES; i++) {
> +			mfx->dmaPageTable[i+MADIFX_MAX_PAGE_TABLE_SIZE/2] =
> +				snd_pcm_sgbuf_get_addr(substream,
> +						i * MADIFX_HW_PAGE_SIZE);
> +		}
> +
> +		/* MADI In, 192 channels */
> +		for (i = 0; i < NUM_MADI_PAGES; i++) {
> +			mfx->dmaPageTable[i + MADIFX_MAX_PAGE_TABLE_SIZE / 2 + NUM_DMA_CH_PAGES] =
> +				snd_pcm_sgbuf_get_addr(substream,
> +					(i + NUM_AES_PAGES) * MADIFX_HW_PAGE_SIZE);
> +		}
> +
> +		for (i = MADIFX_MAX_PAGE_TABLE_SIZE/2;
> +				i < MADIFX_MAX_PAGE_TABLE_SIZE; i++) {
> +			madifx_write(mfx, MADIFX_PAGE_ADDRESS_LIST + (4 * i),
> +					mfx->dmaPageTable[i]);
> +		}
> +
> +		for (i = 0; i < 32; ++i)
> +			snd_madifx_enable_in(mfx, i, 1);
> +
> +		mfx->capture_buffer =
> +			(unsigned char *) substream->runtime->dma_area;
> +		snd_printdd("Allocated sample buffer for capture at %p\n",
> +				mfx->capture_buffer);
> +	}
> +
> +	/* Switch to native float format if requested */
> +	if (SNDRV_PCM_FORMAT_FLOAT_LE == params_format(params)) {
> +		if (!(mfx->control_register & MADIFX_float_format))
> +			dev_info(mfx->card->dev,
> +				"mfx: Switching to native 32bit LE float format.\n");

Try to avoid too verbose kernel logs, as user-space can flood it
easily.

> +
> +		mfx->control_register |= MADIFX_float_format;
> +	} else if (SNDRV_PCM_FORMAT_S32_LE == params_format(params)) {
> +		if (mfx->control_register & MADIFX_float_format)
> +			dev_info(mfx->card->dev,
> +				"mfx: Switching to native 32bit LE integer format.\n");
> +
> +		mfx->control_register &= ~MADIFX_float_format;
> +	}
> +	madifx_write(mfx, MADIFX_CONTROL_REG, mfx->control_register);
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_hw_free(struct snd_pcm_substream *substream)
> +{
> +	int i;
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +
> +	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> +
> +		/* params_channels(params) should be enough,
> +		   but to get sure in case of error */
> +		for (i = 0; i < 32; ++i)
> +			snd_madifx_enable_out(mfx, i, 0);
> +
> +		mfx->playback_buffer = NULL;
> +	} else {
> +		for (i = 0; i < 32; ++i)
> +			snd_madifx_enable_in(mfx, i, 0);
> +
> +		mfx->capture_buffer = NULL;
> +
> +	}
> +
> +	snd_pcm_lib_free_pages(substream);
> +
> +	return 0;
> +}
> +
> +
> +static int snd_madifx_channel_info(struct snd_pcm_substream *substream,
> +		struct snd_pcm_channel_info *info)
> +{
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +
> +	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> +		int last_madi_channel = 193;
> +
> +		if (snd_BUG_ON(info->channel >= mfx->max_channels_out)) {
> +			dev_info(mfx->card->dev,
> +				"snd_madifx_channel_info: output channel out of range (%d)\n",
> +				info->channel);
> +			return -EINVAL;
> +		}
> +
> +		switch (mfx->speedmode) {
> +		case ss:
> +		/* MADI FX Playback channel map
> +	AES	   Outputstream 0 with 2 channels at byte offset 0
> +	MADI	   Outputstream 1 with 8 channels at byte offset 131072
> +		   Outputstream 2 with 8 channels at byte offset 393216
> +		   Outputstream 3 with 8 channels at byte offset 655360
> +		   Outputstream 4 with 8 channels at byte offset 917504
> +		   Outputstream 5 with 8 channels at byte offset 1179648
> +		   Outputstream 6 with 8 channels at byte offset 1441792
> +		   Outputstream 7 with 8 channels at byte offset 1703936
> +		   Outputstream 8 with 8 channels at byte offset 1966080
> +		   Outputstream 9 with 8 channels at byte offset 2228224
> +		   Outputstream 10 with 8 channels at byte offset 2490368
> +		   Outputstream 11 with 8 channels at byte offset 2752512
> +		   Outputstream 12 with 8 channels at byte offset 3014656
> +		   Outputstream 13 with 8 channels at byte offset 3276800
> +		   Outputstream 14 with 8 channels at byte offset 3538944
> +		   Outputstream 15 with 8 channels at byte offset 3801088
> +		   Outputstream 16 with 8 channels at byte offset 4063232
> +		   Outputstream 17 with 8 channels at byte offset 4325376
> +		   Outputstream 18 with 8 channels at byte offset 4587520
> +		   Outputstream 19 with 8 channels at byte offset 4849664
> +		   Outputstream 20 with 8 channels at byte offset 5111808
> +		   Outputstream 21 with 8 channels at byte offset 5373952
> +		   Outputstream 22 with 8 channels at byte offset 5636096
> +		   Outputstream 23 with 8 channels at byte offset 5898240
> +		   Outputstream 24 with 8 channels at byte offset 6160384
> +	Phones	   Outputstream 25 with 2 channels at byte offset 65536
> +		*/
> +
> +			/* Note: channels start at zero */
> +			last_madi_channel = 193;
> +			break;
> +		case ds:
> +			last_madi_channel = 97;
> +			break;
> +		case qs:
> +			last_madi_channel = 49;
> +			break;
> +		}
> +	info->offset = (info->channel < 2) ?
> +	    0 : ((info->channel > last_madi_channel) ? 65536 :
> +		    131072 + 8 * 4 * 8192 * ((info->channel-2)/8));
> +	info->first = (info->channel < 2 || info->channel > last_madi_channel) ?
> +	    32 * (info->channel % (last_madi_channel + 1)) :
> +	    32 * ((info->channel-2) % 8);
> +	info->step = (info->channel < 2 || info->channel > last_madi_channel) ?
> +	    64 : 256;
> +	} else {
> +		if (snd_BUG_ON(info->channel >= mfx->max_channels_in)) {
> +			dev_info(mfx->card->dev,
> +				"snd_madifx_channel_info: input channel out of range (%d)\n",
> +					info->channel);
> +			return -EINVAL;
> +		}
> +
> +		switch (mfx->speedmode) {
> +		/* MADI FX Input channel map
> +	AES	   Inputstream 0 with 2 channels at byte offset 0
> +	MADI	   Inputstream 1 with 8 channels at byte offset 65536
> +		   Inputstream 2 with 8 channels at byte offset 327680
> +		   Inputstream 3 with 8 channels at byte offset 589824
> +		   Inputstream 4 with 8 channels at byte offset 851968
> +		   Inputstream 5 with 8 channels at byte offset 1114112
> +		   Inputstream 6 with 8 channels at byte offset 1376256
> +		   Inputstream 7 with 8 channels at byte offset 1638400
> +		   Inputstream 8 with 8 channels at byte offset 1900544
> +		   Inputstream 9 with 8 channels at byte offset 2162688
> +		   Inputstream 10 with 8 channels at byte offset 2424832
> +		   Inputstream 11 with 8 channels at byte offset 2686976
> +		   Inputstream 12 with 8 channels at byte offset 2949120
> +		   Inputstream 13 with 8 channels at byte offset 3211264
> +		   Inputstream 14 with 8 channels at byte offset 3473408
> +		   Inputstream 15 with 8 channels at byte offset 3735552
> +		   Inputstream 16 with 8 channels at byte offset 3997696
> +		   Inputstream 17 with 8 channels at byte offset 4259840
> +		   Inputstream 18 with 8 channels at byte offset 4521984
> +		   Inputstream 19 with 8 channels at byte offset 4784128
> +		   Inputstream 20 with 8 channels at byte offset 5046272
> +		   Inputstream 21 with 8 channels at byte offset 5308416
> +		   Inputstream 22 with 8 channels at byte offset 5570560
> +		   Inputstream 23 with 8 channels at byte offset 5832704
> +		   Inputstream 24 with 8 channels at byte offset 6094848
> +	       */
> +		case ss:
> +		case ds:
> +		case qs:
> +			info->offset = (info->channel < 2) ?
> +				0 :
> +				65536 + 8 * 4 * 8192 * ((info->channel-2)/8);
> +			info->first = (info->channel < 2) ?
> +				32 * info->channel :
> +				32 * ((info->channel-2) % 8);
> +			info->step = (info->channel < 2) ? 64 : 256;
> +			break;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +
> +static int snd_madifx_ioctl(struct snd_pcm_substream *substream,
> +		unsigned int cmd, void *arg)
> +{
> +	switch (cmd) {
> +	case SNDRV_PCM_IOCTL1_RESET:
> +		return snd_madifx_reset(substream);
> +
> +	case SNDRV_PCM_IOCTL1_CHANNEL_INFO:
> +		{
> +			struct snd_pcm_channel_info *info = arg;
> +
> +			return snd_madifx_channel_info(substream, info);
> +		}
> +	default:
> +		break;
> +	}
> +
> +	return snd_pcm_lib_ioctl(substream, cmd, arg);
> +}
> +
> +static int snd_madifx_trigger(struct snd_pcm_substream *substream, int cmd)
> +{
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +	struct snd_pcm_substream *other;
> +	int running;
> +
> +	spin_lock(&mfx->lock);
> +	running = mfx->running;
> +	switch (cmd) {
> +	case SNDRV_PCM_TRIGGER_START:
> +		running |= 1 << substream->stream;
> +		break;
> +	case SNDRV_PCM_TRIGGER_STOP:
> +		running &= ~(1 << substream->stream);
> +		break;
> +	default:
> +		snd_BUG();
> +		spin_unlock(&mfx->lock);
> +		return -EINVAL;
> +	}
> +	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
> +		other = mfx->capture_substream;
> +	else
> +		other = mfx->playback_substream;
> +
> +	if (other) {
> +		struct snd_pcm_substream *s;
> +
> +		snd_pcm_group_for_each_entry(s, substream) {
> +			if (s == other) {
> +				snd_pcm_trigger_done(s, substream);
> +				if (cmd == SNDRV_PCM_TRIGGER_START)
> +					running |= 1 << s->stream;
> +				else
> +					running &= ~(1 << s->stream);
> +				goto _ok;
> +			}
> +		}
> +		if (cmd == SNDRV_PCM_TRIGGER_START) {
> +			if (!(running & (1 << SNDRV_PCM_STREAM_PLAYBACK))
> +					&& substream->stream ==
> +					SNDRV_PCM_STREAM_CAPTURE)
> +				madifx_silence_playback(mfx);
> +		} else {
> +			if (running &&
> +				substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
> +				madifx_silence_playback(mfx);
> +		}
> +	} else {
> +		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
> +			madifx_silence_playback(mfx);
> +	}
> +_ok:
> +	snd_pcm_trigger_done(substream, substream);
> +	if (!mfx->running && running)
> +		madifx_start_audio(mfx);
> +	else if (mfx->running && !running)
> +		madifx_stop_audio(mfx);
> +	mfx->running = running;
> +	spin_unlock(&mfx->lock);
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_prepare(struct snd_pcm_substream *substream)
> +{
> +	return 0;
> +}
> +
> +static struct snd_pcm_hardware snd_madifx_playback_subinfo = {
> +	.info = (SNDRV_PCM_INFO_MMAP |
> +		 SNDRV_PCM_INFO_MMAP_VALID |
> +		 SNDRV_PCM_INFO_COMPLEX |
> +		 SNDRV_PCM_INFO_SYNC_START),
> +	.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_FLOAT_LE,
> +	.rates = (SNDRV_PCM_RATE_32000 |
> +		  SNDRV_PCM_RATE_44100 |
> +		  SNDRV_PCM_RATE_48000 |
> +		  SNDRV_PCM_RATE_64000 |
> +		  SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
> +		  SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000),
> +	.rate_min = 32000,
> +	.rate_max = 192000,
> +	.channels_min = 1,
> +	.channels_max = 196,
> +	.buffer_bytes_max = OUTPUT_DMA_BUFFER_SIZE,
> +	.period_bytes_min = (32 * 4),
> +	.period_bytes_max = OUTPUT_DMA_BUFFER_SIZE,
> +	.periods_min = 2,
> +	.periods_max = 1024,
> +	.fifo_size = 0
> +};
> +
> +static struct snd_pcm_hardware snd_madifx_capture_subinfo = {
> +	.info = (SNDRV_PCM_INFO_MMAP |
> +		 SNDRV_PCM_INFO_MMAP_VALID |
> +		 SNDRV_PCM_INFO_COMPLEX |
> +		 SNDRV_PCM_INFO_SYNC_START),
> +	.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_FLOAT_LE,
> +	.rates = (SNDRV_PCM_RATE_32000 |
> +		  SNDRV_PCM_RATE_44100 |
> +		  SNDRV_PCM_RATE_48000 |
> +		  SNDRV_PCM_RATE_64000 |
> +		  SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
> +		  SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000),
> +	.rate_min = 32000,
> +	.rate_max = 192000,
> +	.channels_min = 1,
> +	.channels_max = 194,
> +	.buffer_bytes_max = INPUT_DMA_BUFFER_SIZE,
> +	.period_bytes_min = (32 * 4),
> +	.period_bytes_max = INPUT_DMA_BUFFER_SIZE,
> +	.periods_min = 2,
> +	.periods_max = 1024,
> +	.fifo_size = 0
> +};
> +
> +static int snd_madifx_hw_rule_in_channels_rate(struct snd_pcm_hw_params *params,
> +					   struct snd_pcm_hw_rule *rule)
> +{
> +	struct mfx *mfx = rule->private;
> +	struct snd_interval *c =
> +	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
> +	struct snd_interval *r =
> +	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
> +
> +	if (r->min > 96000 && r->max <= 192000) {
> +		struct snd_interval t = {
> +			.min = mfx->qs_in_channels,
> +			.max = mfx->qs_in_channels,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(c, &t);
> +	} else if (r->min > 48000 && r->max <= 96000) {
> +		struct snd_interval t = {
> +			.min = mfx->ds_in_channels,
> +			.max = mfx->ds_in_channels,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(c, &t);
> +	} else if (r->max < 64000) {
> +		struct snd_interval t = {
> +			.min = mfx->ss_in_channels,
> +			.max = mfx->ss_in_channels,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(c, &t);
> +	}
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_hw_rule_out_channels_rate(struct snd_pcm_hw_params *
> +						params,
> +						struct snd_pcm_hw_rule *rule)
> +{
> +	struct mfx *mfx = rule->private;
> +	struct snd_interval *c =
> +	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
> +	struct snd_interval *r =
> +	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
> +
> +	if (r->min > 96000 && r->max <= 192000) {
> +		struct snd_interval t = {
> +			.min = mfx->qs_out_channels,
> +			.max = mfx->qs_out_channels,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(c, &t);
> +	} else if (r->min > 48000 && r->max <= 96000) {
> +		struct snd_interval t = {
> +			.min = mfx->ds_out_channels,
> +			.max = mfx->ds_out_channels,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(c, &t);
> +	} else if (r->max < 64000) {
> +		struct snd_interval t = {
> +			.min = mfx->ss_out_channels,
> +			.max = mfx->ss_out_channels,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(c, &t);
> +	}
> +	return 0;
> +}
> +
> +static int snd_madifx_hw_rule_rate_in_channels(struct snd_pcm_hw_params *params,
> +					       struct snd_pcm_hw_rule *rule)
> +{
> +	struct mfx *mfx = rule->private;
> +	struct snd_interval *c =
> +	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
> +	struct snd_interval *r =
> +	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
> +
> +	if (c->min >= mfx->ss_in_channels) {
> +		struct snd_interval t = {
> +			.min = 32000,
> +			.max = 48000,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(r, &t);
> +	} else if (c->max <= mfx->qs_in_channels) {
> +		struct snd_interval t = {
> +			.min = 128000,
> +			.max = 192000,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(r, &t);
> +	} else if (c->max <= mfx->ds_in_channels) {
> +		struct snd_interval t = {
> +			.min = 64000,
> +			.max = 96000,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(r, &t);
> +	}
> +
> +	return 0;
> +}
> +static int snd_madifx_hw_rule_rate_out_channels(struct snd_pcm_hw_params *
> +						params,
> +						struct snd_pcm_hw_rule *rule)
> +{
> +	struct mfx *mfx = rule->private;
> +	struct snd_interval *c =
> +	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
> +	struct snd_interval *r =
> +	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
> +
> +	if (c->min >= mfx->ss_out_channels) {
> +		struct snd_interval t = {
> +			.min = 32000,
> +			.max = 48000,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(r, &t);
> +	} else if (c->max <= mfx->qs_out_channels) {
> +		struct snd_interval t = {
> +			.min = 128000,
> +			.max = 192000,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(r, &t);
> +	} else if (c->max <= mfx->ds_out_channels) {
> +		struct snd_interval t = {
> +			.min = 64000,
> +			.max = 96000,
> +			.integer = 1,
> +		};
> +		return snd_interval_refine(r, &t);
> +	}
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_hw_rule_in_channels(struct snd_pcm_hw_params *params,
> +				      struct snd_pcm_hw_rule *rule)
> +{
> +	unsigned int list[3];
> +	struct mfx *mfx = rule->private;
> +	struct snd_interval *c = hw_param_interval(params,
> +			SNDRV_PCM_HW_PARAM_CHANNELS);
> +
> +	list[0] = mfx->qs_in_channels;
> +	list[1] = mfx->ds_in_channels;
> +	list[2] = mfx->ss_in_channels;
> +	return snd_interval_list(c, 3, list, 0);
> +}
> +
> +static int snd_madifx_hw_rule_out_channels(struct snd_pcm_hw_params *params,
> +				      struct snd_pcm_hw_rule *rule)
> +{
> +	unsigned int list[3];
> +	struct mfx *mfx = rule->private;
> +	struct snd_interval *c = hw_param_interval(params,
> +			SNDRV_PCM_HW_PARAM_CHANNELS);
> +
> +	list[0] = mfx->qs_out_channels;
> +	list[1] = mfx->ds_out_channels;
> +	list[2] = mfx->ss_out_channels;
> +	return snd_interval_list(c, 3, list, 0);
> +}
> +
> +
> +static int snd_madifx_playback_open(struct snd_pcm_substream *substream)
> +{
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +	struct snd_pcm_runtime *runtime = substream->runtime;
> +
> +	spin_lock_irq(&mfx->lock);
> +
> +	snd_pcm_set_sync(substream);
> +
> +
> +	runtime->hw = snd_madifx_playback_subinfo;
> +
> +	if (mfx->capture_substream == NULL)
> +		madifx_stop_audio(mfx);
> +
> +	mfx->playback_pid = current->pid;
> +	mfx->playback_substream = substream;
> +
> +	spin_unlock_irq(&mfx->lock);
> +
> +	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
> +	snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
> +
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		snd_pcm_hw_constraint_minmax(runtime,
> +					     SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
> +					     32, 4096);
> +		snd_pcm_hw_constraint_minmax(runtime,
> +					     SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
> +					     8192, 8192);
> +		break;
> +
> +	default:
> +		snd_pcm_hw_constraint_minmax(runtime,
> +					     SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
> +					     64, 8192);
> +		break;
> +	}
> +
> +	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
> +			snd_madifx_hw_rule_rate_out_channels, mfx,
> +			SNDRV_PCM_HW_PARAM_CHANNELS, -1);
> +
> +	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
> +			snd_madifx_hw_rule_out_channels, mfx,
> +			SNDRV_PCM_HW_PARAM_CHANNELS, -1);
> +
> +	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
> +			snd_madifx_hw_rule_out_channels_rate, mfx,
> +			SNDRV_PCM_HW_PARAM_RATE, -1);
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_playback_release(struct snd_pcm_substream *substream)
> +{
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +
> +	spin_lock_irq(&mfx->lock);
> +
> +	mfx->playback_pid = -1;
> +	mfx->playback_substream = NULL;
> +
> +	spin_unlock_irq(&mfx->lock);
> +
> +	return 0;
> +}
> +
> +
> +static int snd_madifx_capture_open(struct snd_pcm_substream *substream)
> +{
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +	struct snd_pcm_runtime *runtime = substream->runtime;
> +
> +	spin_lock_irq(&mfx->lock);
> +	snd_pcm_set_sync(substream);
> +	runtime->hw = snd_madifx_capture_subinfo;
> +
> +	if (mfx->playback_substream == NULL)
> +		madifx_stop_audio(mfx);
> +
> +	mfx->capture_pid = current->pid;
> +	mfx->capture_substream = substream;
> +
> +	spin_unlock_irq(&mfx->lock);
> +
> +	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
> +	snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
> +
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		snd_pcm_hw_constraint_minmax(runtime,
> +					     SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
> +					     32, 4096);
> +		snd_pcm_hw_constraint_minmax(runtime,
> +					     SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
> +					     8192, 8192);
> +		break;
> +
> +	default:
> +		snd_pcm_hw_constraint_minmax(runtime,
> +					     SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
> +					     64, 8192);
> +		break;
> +	}
> +
> +	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
> +			snd_madifx_hw_rule_rate_in_channels, mfx,
> +			SNDRV_PCM_HW_PARAM_CHANNELS, -1);
> +
> +	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
> +			snd_madifx_hw_rule_in_channels, mfx,
> +			SNDRV_PCM_HW_PARAM_CHANNELS, -1);
> +
> +	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
> +			snd_madifx_hw_rule_in_channels_rate, mfx,
> +			SNDRV_PCM_HW_PARAM_RATE, -1);
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_capture_release(struct snd_pcm_substream *substream)
> +{
> +	struct mfx *mfx = snd_pcm_substream_chip(substream);
> +
> +	spin_lock_irq(&mfx->lock);
> +
> +	mfx->capture_pid = -1;
> +	mfx->capture_substream = NULL;
> +
> +	spin_unlock_irq(&mfx->lock);
> +	return 0;
> +}
> +
> +static int snd_madifx_hwdep_dummy_op(struct snd_hwdep *hw, struct file *file)
> +{
> +	/* we have nothing to initialize but the call is required */
> +	return 0;
> +}

Hmm, I thought open and close hwdep ops are optional?


> +
> +static inline int copy_u32_le(void __user *dest, void __iomem *src)
> +{
> +	u32 val = readl(src);
> +
> +	return copy_to_user(dest, &val, 4);
> +}

Called from nowhere?


> +
> +static int snd_madifx_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
> +		unsigned int cmd, unsigned long arg)
> +{
> +	void __user *argp = (void __user *)arg;
> +	struct mfx *mfx = hw->private_data;
> +	struct madifx_config info;
> +	struct madifx_status status;
> +#ifdef CONFIG_SND_MADIFX_BROKEN
> +	struct madifx_level_buffer *levels;
> +	struct madifx_mixer_ioctl mixer;
> +	unsigned long int s;
> +#endif /* CONFIG_SND_MADIFX_BROKEN */
> +	int i = 0;
> +
> +	switch (cmd) {
> +
> +#ifdef CONFIG_SND_MADIFX_BROKEN
> +	int row;
> +
> +	case SNDRV_MADIFX_IOCTL_GET_LEVEL:
> +
> +		levels = &(mfx->peak_rms);
> +		for (row = 1; row <= 5 ; row++) {
> +			int rms_index, peak_index;
> +			u32 *target_rms, *target_peak;
> +
> +			switch (row) {
> +			case 1:
> +				rms_index = MADIFX_RD_RMS_IN;
> +				peak_index = MADIFX_RD_PEAK_IN;
> +				target_rms = levels->rms_in;
> +				target_peak = levels->peak_in;
> +				break;
> +			case 2:
> +				rms_index = MADIFX_RD_RMS_PLAY;
> +				peak_index = MADIFX_RD_PEAK_PLAY;
> +				target_rms = levels->rms_play;
> +				target_peak = levels->peak_play;
> +				break;
> +			case 3:
> +				rms_index = MADIFX_RD_RMS_OUT;
> +				peak_index = MADIFX_RD_PEAK_OUT;
> +				target_rms = levels->rms_out;
> +				target_peak = levels->peak_out;
> +				break;
> +			case 4:
> +				rms_index = MADIFX_RD_RMS_IN_PRE;
> +				peak_index = MADIFX_RD_PEAK_IN_PRE;
> +				target_rms = levels->rms_in_pre;
> +				target_peak = levels->peak_in_pre;
> +				break;
> +			default:
> +				rms_index = MADIFX_RD_RMS_OUT_PRE;
> +				peak_index = MADIFX_RD_PEAK_OUT_PRE;
> +				target_rms = levels->rms_out_pre;
> +				target_peak = levels->peak_out_pre;
> +				break;
> +			}
> +
> +			for (i = 0; i < 2 * 256; i++)
> +				*(target_rms + i) =
> +					mfx->level_buffer[rms_index + i];
> +
> +			for (i = 0; i < 256; i++)
> +				*(target_peak + i) =
> +					mfx->level_buffer[peak_index + i];
> +		}
> +
> +		levels->speed = mfx->speedmode;
> +
> +		s = copy_to_user(argp, levels,
> +				 sizeof(struct madifx_level_buffer));
> +		if (0 != s) {
> +			/* snd_printk(KERN_ERR "copy_to_user(.., .., %lu): %lu
> +			 [Levels]\n", sizeof(struct madifx_peak_rms), s);
> +			 */
> +			return -EFAULT;
> +		}
> +
> +		madifx_write(mfx, MADIFX_START_LEVEL, 0);
> +
> +		break;
> +#endif /* CONFIG_SND_MADIFX_BROKEN */
> +
> +
> +	case SNDRV_MADIFX_IOCTL_GET_CONFIG:
> +
> +		memset(&info, 0, sizeof(info));
> +		spin_lock_irq(&mfx->lock);
> +
> +		for (i = 0; i < ARRAY_SIZE(info.madi_tx_64); i++) {
> +			info.madi_tx_64[i] = madifx_read_toggle_setting(mfx,
> +					(MADIFX_madi1_tx_64ch << i));
> +
> +			info.madi_smux[i] = madifx_read_toggle_setting(mfx,
> +					(MADIFX_madi1_smux << i));
> +		}
> +
> +		info.wcterm = madifx_read_toggle_setting(mfx,
> +				MADIFX_WCK_TERM);
> +
> +		info.wck48 = madifx_read_toggle_setting(mfx, MADIFX_WCK48);
> +
> +		info.aespro = madifx_read_toggle_setting(mfx, MADIFX_PRO);
> +
> +		info.redundancy_mode = madifx_read_toggle_setting(mfx,
> +				MADIFX_redundancy_mode);
> +
> +		info.mirror_madi_out = madifx_read_toggle_setting(mfx,
> +				MADIFX_mirror_madi_out);
> +
> +
> +		spin_unlock_irq(&mfx->lock);
> +		if (copy_to_user(argp, &info, sizeof(info)))
> +			return -EFAULT;
> +		break;
> +
> +	case SNDRV_MADIFX_IOCTL_GET_STATUS:
> +		memset(&status, 0, sizeof(status));
> +
> +		status.card_type = mfx->io_type;
> +
> +		status.clock_selection = madifx_get_clock_select(mfx);
> +
> +		status.system_sample_rate =
> +			madifx_get_system_sample_rate(mfx);
> +
> +
> +		for (i = 0; i < ARRAY_SIZE(status.sync_check); i++) {
> +			status.sync_check[i] = madifx_sync_check(mfx, i);
> +			status.external_sample_rates[i] =
> +				HDSPM_bit2freq(
> +					madifx_external_freq_index(mfx, i));
> +		}
> +
> +		for (i = 0; i < ARRAY_SIZE(status.madi_channelcount); i++) {
> +			status.madi_channelcount[i] =
> +				madifx_get_madichannelcount(mfx, i);
> +		}
> +
> +
> +		if (copy_to_user(argp, &status, sizeof(status)))
> +			return -EFAULT;
> +
> +
> +		break;
> +
> +#ifdef CONFIG_SND_MADIFX_BROKEN
> +	case SNDRV_MADIFX_IOCTL_GET_MIXER:
> +		if (copy_from_user(&mixer, argp, sizeof(mixer)))
> +			return -EFAULT;
> +		if (copy_to_user((void __user *)mixer.mixer, mfx->newmixer,
> +					sizeof(struct madifx_newmixer)))
> +			return -EFAULT;
> +		break;
> +#endif /* CONFIG_SND_MADIFX_BROKEN */
> +
> +	default:
> +		return -EINVAL;
> +	}
> +	return 0;
> +}
> +
> +static struct snd_pcm_ops snd_madifx_playback_ops = {
> +	.open = snd_madifx_playback_open,
> +	.close = snd_madifx_playback_release,
> +	.ioctl = snd_madifx_ioctl,
> +	.hw_params = snd_madifx_hw_params,
> +	.hw_free = snd_madifx_hw_free,
> +	.prepare = snd_madifx_prepare,
> +	.trigger = snd_madifx_trigger,
> +	.pointer = snd_madifx_hw_pointer,
> +	.page = snd_pcm_sgbuf_ops_page,
> +};
> +
> +static struct snd_pcm_ops snd_madifx_capture_ops = {
> +	.open = snd_madifx_capture_open,
> +	.close = snd_madifx_capture_release,
> +	.ioctl = snd_madifx_ioctl,
> +	.hw_params = snd_madifx_hw_params,
> +	.hw_free = snd_madifx_hw_free,
> +	.prepare = snd_madifx_prepare,
> +	.trigger = snd_madifx_trigger,
> +	.pointer = snd_madifx_hw_pointer,
> +	.page = snd_pcm_sgbuf_ops_page,
> +};
> +
> +static int snd_madifx_create_hwdep(struct snd_card *card,
> +					    struct mfx *mfx)
> +{
> +	struct snd_hwdep *hw;
> +	int err;
> +
> +	err = snd_hwdep_new(card, "MADIFX hwdep", 0, &hw);
> +	if (err < 0)
> +		return err;
> +
> +	mfx->hwdep = hw;
> +	hw->private_data = mfx;
> +	strcpy(hw->name, "MADIFX hwdep interface");
> +
> +	hw->ops.open = snd_madifx_hwdep_dummy_op;
> +	hw->ops.ioctl = snd_madifx_hwdep_ioctl;
> +	hw->ops.ioctl_compat = snd_madifx_hwdep_ioctl;
> +	hw->ops.release = snd_madifx_hwdep_dummy_op;
> +
> +	return 0;
> +}
> +
> +
> +/*------------------------------------------------------------
> +   memory interface
> + ------------------------------------------------------------*/
> +static int snd_madifx_preallocate_memory(struct mfx *mfx)
> +{
> +	int err;
> +#ifdef CONFIG_SND_MADIFX_BROKEN
> +	int i;
> +	int lpti; /* level page table index */
> +	dma_addr_t levelPageTable[MADIFX_NUM_LEVEL_PAGES];
> +#endif
> +	struct snd_pcm *pcm;
> +	size_t wanted;
> +
> +	pcm = mfx->pcm;
> +
> +
> +	wanted = max(INPUT_DMA_BUFFER_SIZE, OUTPUT_DMA_BUFFER_SIZE);
> +
> +	mfx->dmaPageTable = kzalloc(sizeof(dma_addr_t) *
> +			MADIFX_MAX_PAGE_TABLE_SIZE, GFP_KERNEL);
> +
> +	if (!mfx->dmaPageTable) {
> +		dev_err(mfx->card->dev,
> +			"MADIFX: unable to kmalloc dmaPageTable memory\n");
> +		return -ENOMEM;
> +	}
> +
> +	err =
> +	     snd_pcm_lib_preallocate_pages_for_all(pcm,
> +						   SNDRV_DMA_TYPE_DEV_SG,
> +						   snd_dma_pci_data(mfx->pci),
> +						   wanted,
> +						   wanted);
> +	if (err < 0) {
> +		snd_printdd("Could not preallocate %zd Bytes\n", wanted);
> +
> +		return err;
> +	} else {
> +		snd_printdd(" Preallocated %zd Bytes\n", wanted);
> +	}
> +
> +#ifdef CONFIG_SND_MADIFX_BROKEN
> +	/* allocate level buffer */
> +	err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_SG,
> +			snd_dma_pci_data(mfx->pci),
> +			MADIFX_LEVEL_BUFFER_SIZE, &mfx->dmaLevelBuffer);
> +	if (err < 0) {
> +		dev_err(mfx->card->dev,
> +			"MADIFX: Unable to allocate DMA level buffer\n");
> +		return -ENOMEM;
> +	}
> +
> +	/* Fill level page table */
> +	for (i = 0; i < MADIFX_NUM_LEVEL_PAGES; i++) {
> +		levelPageTable[i] = snd_sgbuf_get_addr(&(mfx->dmaLevelBuffer),
> +				i * MADIFX_HW_PAGE_SIZE);
> +
> +	}
> +
> +	/* Write level page table to device */
> +	lpti = (MADIFX == mfx->io_type) ? MADIFX_LPTI_HMFX :
> +		MADIFX_LPTI_MFXT;
> +
> +	for (i = 0; i < MADIFX_NUM_LEVEL_PAGES; i++) {
> +		madifx_write(mfx, MADIFX_PAGE_ADDRESS_LIST + (4 * (lpti + i)),
> +				levelPageTable[i]);
> +	}
> +
> +	mfx->level_buffer = (u32 *)mfx->dmaLevelBuffer.area;
> +
> +	memset(mfx->level_buffer, 0, MADIFX_LEVEL_BUFFER_SIZE);
> +#endif /* MADFIX_BROKEN */
> +
> +
> +	return 0;
> +}
> +
> +
> +/* ------------- ALSA Devices ---------------------------- */
> +static int snd_madifx_create_pcm(struct snd_card *card,
> +					  struct mfx *mfx)
> +{
> +	struct snd_pcm *pcm;
> +	int err;
> +
> +	err = snd_pcm_new(card, mfx->card_name, 0, 1, 1, &pcm);
> +	if (err < 0)
> +		return err;
> +
> +	mfx->pcm = pcm;
> +	pcm->private_data = mfx;
> +	strcpy(pcm->name, mfx->card_name);
> +
> +	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
> +			&snd_madifx_playback_ops);
> +	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
> +			&snd_madifx_capture_ops);
> +
> +	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
> +
> +	err = snd_madifx_preallocate_memory(mfx);
> +	if (err < 0)
> +		return err;
> +
> +	return 0;
> +}
> +
> +static inline void snd_madifx_initialize_midi_flush(struct mfx *mfx)
> +{
> +	int i;
> +
> +	for (i = 0; i < mfx->midiPorts; i++)
> +		snd_madifx_flush_midi_input(mfx, i);
> +}
> +
> +static int snd_madifx_create_alsa_devices(struct snd_card *card,
> +						   struct mfx *mfx)
> +{
> +	int err, i;
> +
> +	snd_printdd("Create card...\n");
> +	err = snd_madifx_create_pcm(card, mfx);
> +	if (err < 0)
> +		return err;
> +
> +	i = 0;
> +	while (i < mfx->midiPorts) {
> +		err = snd_madifx_create_midi(card, mfx, i);
> +		if (err < 0)
> +			return err;
> +		i++;
> +	}
> +
> +	err = snd_madifx_create_controls(card, mfx);
> +	if (err < 0)
> +		return err;
> +
> +	err = snd_madifx_create_hwdep(card, mfx);
> +	if (err < 0)
> +		return err;
> +
> +	snd_printdd("proc init...\n");
> +	snd_madifx_proc_init(mfx);
> +
> +	mfx->system_sample_rate = -1;
> +	mfx->last_external_sample_rate = -1;
> +	mfx->last_internal_sample_rate = -1;
> +	mfx->playback_pid = -1;
> +	mfx->capture_pid = -1;
> +	mfx->capture_substream = NULL;
> +	mfx->playback_substream = NULL;
> +
> +	snd_printdd("Set defaults...\n");
> +	err = snd_madifx_set_defaults(mfx);
> +	if (err < 0)
> +		return err;
> +
> +	snd_printdd("Update mixer controls...\n");
> +#if 0
> +	/* FIXME: MADI FX disable, old mixer is broken */
> +	madifx_update_simple_mixer_controls(mfx);
> +#endif
> +
> +	snd_printdd("Initializeing complete ???\n");
> +
> +	err = snd_card_register(card);
> +	if (err < 0) {
> +		dev_err(mfx->card->dev,
> +			    "MADIFX: error registering card\n");
> +		return err;
> +	}
> +
> +	snd_printdd("... yes now\n");
> +
> +	return 0;
> +}
> +
> +static int snd_madifx_create(struct snd_card *card,
> +		struct mfx *mfx) {
> +
> +	struct pci_dev *pci = mfx->pci;
> +	int err;
> +	int i;
> +	unsigned long io_extent;
> +
> +	mfx->irq = -1;
> +	mfx->card = card;
> +
> +	spin_lock_init(&mfx->lock);
> +
> +	pci_read_config_word(mfx->pci,
> +			PCI_CLASS_REVISION, &mfx->firmware_rev);
> +
> +	strcpy(card->mixername, "Xilinx FPGA");
> +	strcpy(card->driver, "MADIFX");
> +
> +	switch (mfx->firmware_rev) {
> +	case HDSPM_MADIFX_REV:
> +		mfx->io_type = MADIFX;
> +		mfx->card_name = "RME MADI FX";
> +		mfx->midiPorts = 4;
> +		break;
> +	default:
> +		dev_err(mfx->card->dev,
> +			"MADIFX: unknown firmware revision %x\n",
> +			mfx->firmware_rev);
> +		return -ENODEV;
> +	}
> +
> +	err = pci_enable_device(pci);
> +	if (err < 0)
> +		return err;
> +
> +	pci_set_master(mfx->pci);
> +
> +	err = pci_request_regions(pci, "mfx");
> +	if (err < 0)
> +		return err;
> +
> +	mfx->port = pci_resource_start(pci, 0);
> +	io_extent = pci_resource_len(pci, 0);
> +
> +	snd_printdd("grabbed memory region 0x%lx-0x%lx\n",
> +			mfx->port, mfx->port + io_extent - 1);
> +
> +	mfx->iobase = ioremap_nocache(mfx->port, io_extent);
> +	if (!mfx->iobase) {
> +		dev_err(mfx->card->dev,
> +			"MADIFX: unable to remap region 0x%lx-0x%lx\n",
> +				mfx->port, mfx->port + io_extent - 1);
> +		return -EBUSY;
> +	}
> +	snd_printdd("remapped region (0x%lx) 0x%lx-0x%lx\n",
> +			(unsigned long)mfx->iobase, mfx->port,
> +			mfx->port + io_extent - 1);
> +
> +	if (request_irq(pci->irq, snd_madifx_interrupt,
> +			IRQF_SHARED, KBUILD_MODNAME, mfx)) {
> +		dev_err(mfx->card->dev,
> +			"MADIFX: unable to use IRQ %d\n", pci->irq);
> +		return -EBUSY;
> +	}
> +
> +	snd_printdd("use IRQ %d\n", pci->irq);
> +
> +	mfx->irq = pci->irq;
> +
> +	snd_printdd("kmalloc Mixer memory of %zd Bytes\n",
> +			sizeof(struct madifx_newmixer));
> +
> +	mfx->newmixer = kzalloc(sizeof(struct madifx_newmixer), GFP_KERNEL);
> +	if (!mfx->newmixer) {
> +		return -ENOMEM;
> +	}
> +
> +	/* This initialises the mixer to a static 1:1 routing.
> +	 *
> +	 * The new mixer is a list of tuples (C, g), where C represents
> +	 * a point in the matrix (x,y) encoded into a single integer and
> +	 * g the corresponding gain value.
> +	 *
> +	 * For a given channel number i,
> +	 *    256 + i encodes the input channel
> +	 * and
> +	 *    i << 9 encodes the output channel.
> +	 *
> +	 * C is then encoded as (256 + x) | (y << 9)
> +	 */
> +
> +	for (i = 0; i < MADIFX_NUM_OUTPUT_GAINS; i++)
> +		mfx->newmixer->output_gain[i] = 0x9000;
> +
> +	for (i = 0; i < MADIFX_LIST_LENGTH; i++) {
> +		mfx->newmixer->listCh[i] = 0;
> +		mfx->newmixer->listVol[i] = 0;
> +	}
> +
> +	for (i = 0; i < 196; i++) {
> +		mfx->newmixer->listCh[i] = (256 + i) | (i << 9);
> +		mfx->newmixer->listVol[i] = 32768+(32768>>3);
> +	}
> +
> +	/* Of course, the data has to be written to the device before
> +	 * something can happen.
> +	 */
> +	for (i = 0; i < MADIFX_LIST_LENGTH; i++) {
> +		madifx_write(mfx, MADIFX_MIXER_LIST_CH + (4 * i),
> +			     mfx->newmixer->listCh[i]);
> +		madifx_write(mfx, MADIFX_MIXER_LIST_VOL + (4 * i),
> +			     mfx->newmixer->listVol[i]);
> +	}
> +
> +	for (i = 0; i < MADIFX_NUM_OUTPUT_GAINS; i++) {
> +		madifx_write(mfx, MADIFX_WR_OUTPUT_GAIN + (4 * i),
> +			     mfx->newmixer->output_gain[i]);
> +	}
> +
> +
> +	mfx->port_names_in = NULL;
> +	mfx->port_names_out = NULL;
> +
> +	switch (mfx->io_type) {
> +	case MADIFX:
> +		mfx->ss_in_channels = MADIFX_SS_IN_CHANNELS;
> +		mfx->ds_in_channels = MADIFX_DS_IN_CHANNELS;
> +		mfx->qs_in_channels = MADIFX_QS_IN_CHANNELS;
> +		mfx->ss_out_channels = MADIFX_SS_OUT_CHANNELS;
> +		mfx->ds_out_channels = MADIFX_DS_OUT_CHANNELS;
> +		mfx->qs_out_channels = MADIFX_QS_OUT_CHANNELS;
> +		/* FIXME: portnames and stuff missing */
> +		break;
> +	}
> +
> +
> +	/* texts */
> +	switch (mfx->io_type) {
> +	/* Keep the switch if MFXT will be different */
> +	case MADIFX:
> +		mfx->texts_clocksource = texts_madifx_clock_source;
> +		mfx->texts_clocksource_items =
> +			ARRAY_SIZE(texts_madifx_clock_source);
> +		break;
> +	}
> +
> +	tasklet_init(&mfx->midi_tasklet,
> +			madifx_midi_tasklet, (unsigned long) mfx);
> +
> +
> +	sprintf(card->id, "MADIFXtest");
> +	snd_card_set_id(card, card->id);

Why need to to set a fixed ID string...?


> +	snd_printdd("create alsa devices.\n");
> +	err = snd_madifx_create_alsa_devices(card, mfx);
> +	if (err < 0)
> +		return err;
> +
> +	snd_madifx_initialize_midi_flush(mfx);
> +
> +	return 0;
> +}
> +
> +
> +static int snd_madifx_free(struct mfx *mfx)
> +{
> +
> +	if (mfx->port) {
> +
> +		/* stop th audio, and cancel all interrupts */
> +		mfx->control_register &=
> +		    ~(MADIFX_START | MADIFX_IE_AUDIO |
> +		      MADIFX_IEN0 | MADIFX_IEN1 |
> +		      MADIFX_IEN2 | MADIFX_IEN3);
> +		madifx_write(mfx, MADIFX_CONTROL_REG,
> +			    mfx->control_register);
> +		madifx_write(mfx, MADIFX_START_LEVEL, 0);
> +	}
> +
> +	if (mfx->irq >= 0)
> +		free_irq(mfx->irq, (void *) mfx);
> +
> +	kfree(mfx->newmixer);
> +	kfree(mfx->dmaPageTable);
> +#ifdef CONFIG_SND_MADIFX_BROKEN
> +	snd_dma_free_pages(&(mfx->dmaLevelBuffer));
> +#endif
> +
> +	iounmap(mfx->iobase);
> +
> +	if (mfx->port)
> +		pci_release_regions(mfx->pci);
> +
> +	pci_disable_device(mfx->pci);
> +	return 0;
> +}
> +
> +
> +static void snd_madifx_card_free(struct snd_card *card)
> +{
> +	struct mfx *mfx = card->private_data;
> +
> +	if (mfx)
> +		snd_madifx_free(mfx);
> +}
> +
> +
> +static int snd_madifx_probe(struct pci_dev *pci,
> +				     const struct pci_device_id *pci_id)
> +{
> +	static int dev;
> +	struct mfx *mfx;
> +	struct snd_card *card;
> +	int err;
> +
> +	if (dev >= SNDRV_CARDS)
> +		return -ENODEV;
> +	if (!enable[dev]) {
> +		dev++;
> +		return -ENOENT;
> +	}
> +
> +	err = snd_card_new(&pci->dev, index[dev], id[dev],
> +			THIS_MODULE, sizeof(struct mfx), &card);
> +	if (err < 0)
> +		return err;
> +
> +	mfx = card->private_data;
> +	card->private_free = snd_madifx_card_free;
> +	mfx->dev = dev;
> +	mfx->pci = pci;
> +
> +	err = snd_madifx_create(card, mfx);
> +	if (err < 0) {
> +		snd_card_free(card);
> +		return err;
> +	}
> +
> +	sprintf(card->shortname, "%s_%x",
> +			mfx->card_name,
> +			mfx->serial);
> +	sprintf(card->longname, "%s S/N 0x%x at 0x%lx, irq %d",
> +			mfx->card_name,
> +			mfx->serial,
> +			mfx->port, mfx->irq);
> +
> +	err = snd_card_register(card);
> +	if (err < 0) {
> +		snd_card_free(card);
> +		return err;
> +	}
> +
> +	pci_set_drvdata(pci, card);
> +
> +	madifx_write(mfx, MADIFX_START_LEVEL, 1);
> +
> +	dev++;
> +	return 0;
> +}
> +
> +static void snd_madifx_remove(struct pci_dev *pci)
> +{
> +	snd_card_free(pci_get_drvdata(pci));
> +	pci_set_drvdata(pci, NULL);

pci_set_drvdata(NULL) is superfluous nowadays.

> +}
> +
> +static struct pci_driver madifx_driver = {
> +	.name = KBUILD_MODNAME,
> +	.id_table = snd_madifx_ids,
> +	.probe = snd_madifx_probe,
> +	.remove = snd_madifx_remove,

So we have no PM support?  Please describe it in the commit log.


thanks,

Takashi

> +};
> +
> +module_pci_driver(madifx_driver);
> -- 
> 2.1.0
> 
> 
>