WL1271 chip

WL1271 chip

[Brzezowski, Karen]

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RE: WL1271 chip

[Arend Van Spriel]

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RE: WL1271 chip

[Arend Van Spriel]

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Re: WL1271 chip

[Elvis Dowson]

Hi Karen,
                   
On Dec 20, 2010, at 9:12 PM, Brzezowski, Karen wrote:

> I looked at arch/arm/mach-omap2/board-zoom-peripherals.c file..
> I didn't see anything specific to SDIO..

I'm attaching a patch that integrates the Murata WL1271 chip with the MMC2 SDIO
controller for the BeagleBoard. You can try to adapt this for you iMX platform.

> I was looking at linux-2.6.36.2..
> Is this the correct version to look at?

You will have to use linux-2.6.37-rc6 or higher for mainline kernel support for the
wl1271 device.

You will also need to ensure that you have the following kernel configuration options
are set:

CONFIG_REGULATOR_FIXED_VOLTAGE = y
CONFIG_WL12XX=m
CONFIG_WL1271=m
CONFIG_WL1271_SDIO=m
CONFIG_WL12XX_PLATFORM_DATA=y

Best regards,

Elvis Dowson


>From e84ded71b45aecd340ec6030a540d0305c43c82d Mon Sep 17 00:00:00 2001
From: Elvis Dowson <elvis.dowson@gmail.com>
Date: Fri, 17 Dec 2010 12:27:23 +0400
Subject: [PATCH] Add support for Murata wl1271 wlan module.

---
arch/arm/mach-omap2/Makefile                 |    1 +
arch/arm/mach-omap2/board-beagle20-wifi.c |   64 ++++++++++++++++++++++++++
arch/arm/mach-omap2/board-beagle20-wifi.h |   24 ++++++++++
arch/arm/mach-omap2/board-omap3beagle.c      |   62 +++++++++++++++++++++++++
4 files changed, 151 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/board-beagle20-wifi.c
create mode 100644 arch/arm/mach-omap2/board-beagle20-wifi.h

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 60e51bc..36f2b69 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -119,6 +119,7 @@ obj-$(CONFIG_MACH_OMAP_2430SDP)		+= board-2430sdp.o \
					   hsmmc.o
obj-$(CONFIG_MACH_OMAP_APOLLON)		+= board-apollon.o
obj-$(CONFIG_MACH_OMAP3_BEAGLE)		+= board-omap3beagle.o \
+					   board-beagle20-wifi.o \
					   hsmmc.o
obj-$(CONFIG_MACH_DEVKIT8000)     	+= board-devkit8000.o \
                                           hsmmc.o
diff --git a/arch/arm/mach-omap2/board-beagle20-wifi.c b/arch/arm/mach-omap2/board-beagle20-wifi.c
new file mode 100644
index 0000000..4f75e2d
--- /dev/null
+++ b/arch/arm/mach-omap2/board-beagle20-wifi.c
@@ -0,0 +1,64 @@
+/*
+ * linux/arch/arm/mach-omap2/board-beagle20-wifi.c
+ *
+ *
+ *
+ * Copyright (C) 2010 Texas Instruments Inc.
+ *
+ * Author :
+ *	Elvis Dowson <elvis.dowson@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/sdio_ids.h>
+
+#include <linux/gpio.h>
+
+#include "board-beagle20-wifi.h"
+#include "mux.h"
+
+void wlan_mux_init(void)
+{
+    pr_info("%s: Configuring mux settings for wl1271 wlan module\n", __func__);
+
+    /* OMAP_BEAGLE20_WIFI_PMENA_GPIO and OMAP_BEAGLE20_WIFI_IRQ_GPIO */
+	omap_mux_init_gpio(OMAP_BEAGLE20_WIFI_PMENA_GPIO, OMAP_PIN_OUTPUT);
+	omap_mux_init_gpio(OMAP_BEAGLE20_WIFI_IRQ_GPIO,   OMAP_PIN_INPUT_PULLUP);
+
+	/*
+	 * MMC2 pin mux settings.
+	 *
+	 * The pix mux strings can be found in /arch/arm/mach-omap2/mux34xx.c
+	 *
+	 * Refer the TI OMAP 35x Technical Reference Manual (Rev.D), page 840
+	 * for the following example.
+	 *
+	 * If the string name is “xxx.yyy”
+	 * xxx – is the name of the default mode of the pad, usually Mode 0
+	 *       as described in the TRM.
+	 * yyy – is the pin on that pad you want to select.
+	 *
+	 * For example, MMC3 CLK line ("sdmmc3_clk")  can be brought out in
+	 * 2 places ("mcspi1_cs2" and "etk_clk").
+	 *
+	 */
+	omap_mux_init_signal("sdmmc2_clk.sdmmc2_clk", 	OMAP_PIN_INPUT_PULLUP);
+	omap_mux_init_signal("sdmmc2_cmd.sdmmc2_cmd", 	OMAP_PIN_INPUT_PULLUP);
+	omap_mux_init_signal("sdmmc2_dat0.sdmmc2_dat0", OMAP_PIN_INPUT_PULLUP);
+	omap_mux_init_signal("sdmmc2_dat1.sdmmc2_dat1", OMAP_PIN_INPUT_PULLUP);
+	omap_mux_init_signal("sdmmc2_dat2.sdmmc2_dat2", OMAP_PIN_INPUT_PULLUP);
+	omap_mux_init_signal("sdmmc2_dat3.sdmmc2_dat3", OMAP_PIN_INPUT_PULLUP);
+}
+
diff --git a/arch/arm/mach-omap2/board-beagle20-wifi.h b/arch/arm/mach-omap2/board-beagle20-wifi.h
new file mode 100644
index 0000000..5ce7df2
--- /dev/null
+++ b/arch/arm/mach-omap2/board-beagle20-wifi.h
@@ -0,0 +1,24 @@
+/*
+ * linux/arch/arm/mach-omap2/board-beagle20-wifi.h
+ *
+ * 
+ *
+ * Copyright (C) 2010 Texas Instruments Inc.
+ *
+ * Author :
+ *	Elvis Dowson <elvis.dowson@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef BOARD_BEAGLE20_WIFI_H_
+#define BOARD_BEAGLE20_WIFI_H_
+
+#define OMAP_BEAGLE20_WIFI_PMENA_GPIO 139     /* Murata TI WL1271 WLAN module enable GPIO */
+#define OMAP_BEAGLE20_WIFI_IRQ_GPIO   137     /* Murata TI WL1271 WLAN module IRQ GPIO */
+
+void wlan_mux_init(void);
+
+#endif /* BOARD_BEAGLE20_WIFI_H_ */
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 50af879..6d1fcd6 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -30,7 +30,9 @@
#include <linux/mmc/host.h>

#include <linux/regulator/machine.h>
+#include <linux/regulator/fixed.h>
#include <linux/i2c/twl.h>
+#include <linux/wl12xx.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -45,6 +47,7 @@
#include <plat/nand.h>
#include <plat/usb.h>

+#include "board-beagle20-wifi.h"
#include "mux.h"
#include "hsmmc.h"
#include "timer-gp.h"
@@ -166,6 +169,14 @@ static struct omap2_hsmmc_info mmc[] = {
		.gpio_cd	= -EINVAL,
		.gpio_wp	= -EINVAL,
	},
+	{
+		.name		= "wl1271",
+		.mmc		= 2,
+		.caps		= MMC_CAP_4_BIT_DATA | MMC_CAP_POWER_OFF_CARD,
+		.gpio_wp	= -EINVAL,
+		.gpio_cd	= -EINVAL,
+		.nonremovable	= true,
+	},
	{}	/* Terminator */
};

@@ -177,6 +188,10 @@ static struct regulator_consumer_supply beagle_vsim_supply = {
	.supply			= "vmmc_aux",
};

+static struct regulator_consumer_supply beagle_vmmc2_supply = {
+	.supply			= "vmmc",
+};
+
static struct gpio_led gpio_leds[];

static int beagle_twl_gpio_setup(struct device *dev,
@@ -187,6 +202,7 @@ static int beagle_twl_gpio_setup(struct device *dev,
	/* link regulators to MMC adapters */
	beagle_vmmc1_supply.dev = mmc[0].dev;
	beagle_vsim_supply.dev = mmc[0].dev;
+	beagle_vmmc2_supply.dev = mmc[1].dev;

	return 0;
}
@@ -217,6 +233,21 @@ static struct regulator_init_data beagle_vmmc1 = {
	.consumer_supplies	= &beagle_vmmc1_supply,
};

+/* VMMC2 for MMC2 card */
+static struct regulator_init_data beagle_vmmc2 = {
+	.constraints = {
+		.min_uV			= 1850000,
+		.max_uV			= 1850000,
+		.apply_uV		= true,
+		.valid_modes_mask	= REGULATOR_MODE_NORMAL
+					| REGULATOR_MODE_STANDBY,
+		.valid_ops_mask		= REGULATOR_CHANGE_MODE
+					| REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies  = 1,
+	.consumer_supplies      = &beagle_vmmc2_supply,
+};
+
/* VSIM for MMC1 pins DAT4..DAT7 (2 mA, plus card == max 50 mA) */
static struct regulator_init_data beagle_vsim = {
	.constraints = {
@@ -261,6 +292,31 @@ static struct regulator_init_data beagle_vpll2 = {
	.consumer_supplies	= &beagle_vdvi_supply,
};

+/* Fixed voltage regulator for wlan module */
+static struct fixed_voltage_config beagle_vwlan = {
+	.supply_name		= "vwl1271",
+	.microvolts		= 1850000, /* 1.8V */
+	.gpio			= OMAP_BEAGLE20_WIFI_PMENA_GPIO,
+	.startup_delay		= 70000, /* 70msec */
+	.enable_high		= 1,
+	.enabled_at_boot	= 0,
+	.init_data		= &beagle_vmmc2,
+};
+
+static struct platform_device omap_vwlan_device = {
+	.name		= "reg-fixed-voltage",
+	.id		= 1,
+	.dev = {
+		.platform_data	= &beagle_vwlan,
+	},
+};
+
+struct wl12xx_platform_data omap_beagle_wlan_data __initdata = {
+	.irq = OMAP_GPIO_IRQ(OMAP_BEAGLE20_WIFI_IRQ_GPIO),
+	/* ZOOM ref clock is 26 MHz */
+	.board_ref_clock = 1,
+};
+
static struct twl4030_usb_data beagle_usb_data = {
	.usb_mode	= T2_USB_MODE_ULPI,
};
@@ -455,6 +511,12 @@ static void __init omap3_beagle_init(void)
	omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);

	beagle_display_init();
+
+	/* wl12xx wlan module */
+	wlan_mux_init();
+	if (wl12xx_set_platform_data(&omap_beagle_wlan_data))
+		pr_err("error setting wl12xx data\n");
+	platform_device_register(&omap_vwlan_device);
}

MACHINE_START(OMAP3_BEAGLE, "Custom BeagleBoard 2.0")
-- 
1.7.0.4

WL1271

[David Lynch Jr.]

	I am looking to get the TI WL1271 WiFi working in an Android Froyo
system. 
	I have Linux kernel experience including network and wifi drivers. 
	I am gathering that there are atleast two different efforts to support
the TI1271 one based on the normal Linux kernel development process and
one that seems to be part of the TI Android community. 
	Can anyone comment on the relative merits of these approaches ?

	Is it reasonable to assume that if I add the WL1271 to the Android
2.6.32 kernel tree using compat-wireless that it will properly integrate
with Android ? If not could someone point me towards resources specific
to Android's wireless implimentation ?

Thank You. 




-- 
Dave Lynch                                                  DLA Systems
Software Development:                                    Embedded Linux
717.587.7774           dhlii@dlasys.net    http://www.dlasys.net
Over 25 years' experience in platforms, languages, and technologies too
numerous to list.

"Any intelligent fool can make things bigger and more complex... It
takes a touch of genius - and a lot of courage to move in the opposite
direction."
Albert Einstein

Re: WL1271

[Elvis Dowson]

Hi,

On Dec 21, 2010, at 1:04 AM, David Lynch Jr. wrote:

> 	I am looking to get the TI WL1271 WiFi working in an Android Froyo
> system. 
> 	I have Linux kernel experience including network and wifi drivers. 
> 	I am gathering that there are atleast two different efforts to support
> the TI1271 one based on the normal Linux kernel development process and
> one that seems to be part of the TI Android community. 
> 	Can anyone comment on the relative merits of these approaches ?
> 
> 	Is it reasonable to assume that if I add the WL1271 to the Android
> 2.6.32 kernel tree using compat-wireless that it will properly integrate
> with Android ? If not could someone point me towards resources specific
> to Android's wireless implimentation ?

I too am working on the very same subject, which is to get the Murata
TI WL1271 chip working with Android 2.2.1.

Chip integration with the board was verified using the mainline wl1271
drivers (linux-2.6.37-rc6). 

With the proprietary TI drivers, I ran into issues getting it to work with my platform
so, while that issue is being addressed, in parallel, I am going to try to use
the compat-wireless package to get wl1271 working with android-2.6.32 and
android-2.2.1.

The only issue I see is I'm not sure if the mainline wl1271 driver currently supports
the android specific wireless commands, and its integration with wpa_supplicant
WEXT driver in the android repo. One could use the AWEXT wrapper core, in this
case, but it is something that I need to see once I get to that stage, in a couple of days.

Elvis Dowson

Re: WL1271

[Bob Copeland]

On Mon, Dec 20, 2010 at 4:04 PM, David Lynch Jr. <dhlii@dlasys.net> wrote:
>        Is it reasonable to assume that if I add the WL1271 to the Android
> 2.6.32 kernel tree using compat-wireless that it will properly integrate
> with Android ?

No; last I checked, Android has all kinds of hacks in the wext layer to
work with their UI.  But in the mainline, new features are added to nl80211
and wext is deprecated.

> If not could someone point me towards resources specific
> to Android's wireless implimentation ?

There's this, but it's a bit out of date:

    http://bobcopeland.com/android_wifi.html

Also I have a few Android ports/makefiles for wireless utitilies here:

    https://github.com/bcopeland

>From there, you can follow github forks and see what the community
is doing with them.

My two cents: it's easier to just use the Android code, but it's worth
a whole lot more in the long run to work towards a mainline-friendly,
nl80211-based wireless system.  That would make support of additional
mainline wireless drivers much easier.

-- 
Bob Copeland %% www.bobcopeland.com

Re: WL1271

[David Lynch Jr.]

	I am essentially doing exactly the same thing as you are - but I am a
few days behind you. I noted a post of yours about 10 days ago in
linux-omap that you were having voltage/SDIO detection problems. I am
having exactly that problem at this moment.  
	How did you work arround it ?
	The WL1271 is attached to MMC2 on my system. All the examples in the
linux wireless tree are on SPI or MMC3. But I think I managed changing
things correctly - except that the error reports are mmc1:
	Also the comments suggest that the WL1271 has its own internal voltage
regulation. 
	That and a CY8CTMG-200 touch screen are the only major items I need
working to polish off this project. 


On Tue, 2010-12-21 at 01:31 +0400, Elvis Dowson wrote:
> Hi,
> 
> On Dec 21, 2010, at 1:04 AM, David Lynch Jr. wrote:
> 
> > 	I am looking to get the TI WL1271 WiFi working in an Android Froyo
> > system. 
> > 	I have Linux kernel experience including network and wifi drivers. 
> > 	I am gathering that there are atleast two different efforts to support
> > the TI1271 one based on the normal Linux kernel development process and
> > one that seems to be part of the TI Android community. 
> > 	Can anyone comment on the relative merits of these approaches ?
> > 
> > 	Is it reasonable to assume that if I add the WL1271 to the Android
> > 2.6.32 kernel tree using compat-wireless that it will properly integrate
> > with Android ? If not could someone point me towards resources specific
> > to Android's wireless implimentation ?
> 
> I too am working on the very same subject, which is to get the Murata
> TI WL1271 chip working with Android 2.2.1.
> 
> Chip integration with the board was verified using the mainline wl1271
> drivers (linux-2.6.37-rc6). 
> 
> With the proprietary TI drivers, I ran into issues getting it to work with my platform
> so, while that issue is being addressed, in parallel, I am going to try to use
> the compat-wireless package to get wl1271 working with android-2.6.32 and
> android-2.2.1.
> 
> The only issue I see is I'm not sure if the mainline wl1271 driver currently supports
> the android specific wireless commands, and its integration with wpa_supplicant
> WEXT driver in the android repo. One could use the AWEXT wrapper core, in this
> case, but it is something that I need to see once I get to that stage, in a couple of days.
> 
> Elvis Dowson
> --
> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: WL1271

[Elvis Dowson]

Hi,

On Dec 21, 2010, at 10:50 PM, David Lynch Jr. wrote:

> 	I am essentially doing exactly the same thing as you are - but I am a
> few days behind you. I noted a post of yours about 10 days ago in
> linux-omap that you were having voltage/SDIO detection problems. I am
> having exactly that problem at this moment.  
> 	How did you work arround it ?
> 	The WL1271 is attached to MMC2 on my system. All the examples in the
> linux wireless tree are on SPI or MMC3. But I think I managed changing
> things correctly - except that the error reports are mmc1:
> 	Also the comments suggest that the WL1271 has its own internal voltage
> regulation. 
> 	That and a CY8CTMG-200 touch screen are the only major items I need
> working to polish off this project. 

If you could send me the schematics, I could comment on it.

There were a couple of hardware related problems that prevented the device from
booting up. 

Here are some of the key things to watch out for:

a. You need a slow clock (SYS 32K signal from the omap processor) to the wlan module

b. You need to ensure that you have a 26Mhz TXCO signal coming in for the fast clock.

This would be controlled by a fixed voltage regulator. The wlan module asserts a WL_CLK_REQ
signal high, which is a signal sent to the LDO to turn on the 26MHz TXCO.

c. You need to probe MMC2 CLK signals to ensure that a 24MHz signal is being generated at the 
output, when the MMC2 controller is initialized.

d. You need to update the mux settings to ensure that the MMC2 CMD, CLK, DAT 0 to DAT3, plus
GPIO pins for WLAN_EN and WLAN_IRQ are muxed correctly.

This should take care of it. 

The SDIO detection problems occured because the 26MHZ TXCO was not being turn on.

You should also be aware of the TI WL1271 power up sequence, which is 10ms pulse high, 64us low,
and then asserted high for atleast 64ms. This is taken care of in the driver code.

Also use the linux-2.6.37-rc6 kernel patch, and apply the patch to read the MAC address from the nvs file.

Also put the firmware and nvs file in /lib/firmware folder, and configure wpa_supplicant.conf to connect
to a secured access point.

Best regards,

Elvis