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From: RONETIX - Asen Dimov <dimov@ronetix.at>
To: Daniel Walker <dwalker@codeaurora.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>,
	Mike Frysinger <vapier@gentoo.org>, Arnd Bergmann <arnd@arndb.de>,
	Nicolas Pitre <nico@fluxnic.net>,
	Tony Lindgren <tony@atomide.com>,
	linux-arm-msm@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@suse.de>,
	linux-kernel@vger.kernel.org,
	FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
	Andrew Morton <akpm@linux-foundation.org>,
	linuxppc-dev@lists.ozlabs.org,
	Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: [PATCH] drivers: char: hvc: add arm JTAG DCC console support
Date: Thu, 07 Apr 2011 21:39:44 +0300	[thread overview]
Message-ID: <4D9E04F0.5010004@ronetix.at> (raw)
In-Reply-To: <1291145141-18301-1-git-send-email-dwalker@codeaurora.org>

Hello,

On 11/30/2010 09:25 PM, Daniel Walker wrote:
> This driver adds a basic console that uses the arm JTAG
> DCC to transfer data back and forth. It has support for
> ARMv6 and ARMv7.
>
> This console is created under the HVC driver, and should be named
> /dev/hvcX (or /dev/hvc0 for example).
>
> Cc: Tony Lindgren<tony@atomide.com>
> Cc: Arnd Bergmann<arnd@arndb.de>
> Cc: Nicolas Pitre<nico@fluxnic.net>
> Cc: Greg Kroah-Hartman<gregkh@suse.de>
> Cc: Mike Frysinger<vapier@gentoo.org>
> Signed-off-by: Daniel Walker<dwalker@codeaurora.org>
> ---
>   drivers/char/Kconfig   |    9 +++
>   drivers/char/Makefile  |    1 +
>   drivers/char/hvc_dcc.c |  133 ++++++++++++++++++++++++++++++++++++++++++++++++
...

this DCC driver implements "one channel", but what about implementing
"multiple channels". For example reserve few(3) bits for channel number,
and two bits for carried data, then fill the rest bytes with with some data
and send the word(32 bits) over DCC. On the Linux side writing on /dev/hvcX
puts the number X as channel number, and on the other side the CPU
emulator gets the data and redistribute it to TCP/IP socket.

I have started write some code implementing this. Are there any one 
interested
in this multiple channels, and are there any one started to work on it?


Regards,
Asen

WARNING: multiple messages have this Message-ID (diff)
From: RONETIX - Asen Dimov <dimov@ronetix.at>
To: Daniel Walker <dwalker@codeaurora.org>
Cc: linux-kernel@vger.kernel.org,
	Randy Dunlap <randy.dunlap@oracle.com>,
	Mike Frysinger <vapier@gentoo.org>, Arnd Bergmann <arnd@arndb.de>,
	Nicolas Pitre <nico@fluxnic.net>,
	Tony Lindgren <tony@atomide.com>,
	linux-arm-msm@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@suse.de>,
	FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
	Andrew Morton <akpm@linux-foundation.org>,
	linuxppc-dev@lists.ozlabs.org,
	Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: [PATCH] drivers: char: hvc: add arm JTAG DCC console support
Date: Thu, 07 Apr 2011 21:39:44 +0300	[thread overview]
Message-ID: <4D9E04F0.5010004@ronetix.at> (raw)
In-Reply-To: <1291145141-18301-1-git-send-email-dwalker@codeaurora.org>

Hello,

On 11/30/2010 09:25 PM, Daniel Walker wrote:
> This driver adds a basic console that uses the arm JTAG
> DCC to transfer data back and forth. It has support for
> ARMv6 and ARMv7.
>
> This console is created under the HVC driver, and should be named
> /dev/hvcX (or /dev/hvc0 for example).
>
> Cc: Tony Lindgren<tony@atomide.com>
> Cc: Arnd Bergmann<arnd@arndb.de>
> Cc: Nicolas Pitre<nico@fluxnic.net>
> Cc: Greg Kroah-Hartman<gregkh@suse.de>
> Cc: Mike Frysinger<vapier@gentoo.org>
> Signed-off-by: Daniel Walker<dwalker@codeaurora.org>
> ---
>   drivers/char/Kconfig   |    9 +++
>   drivers/char/Makefile  |    1 +
>   drivers/char/hvc_dcc.c |  133 ++++++++++++++++++++++++++++++++++++++++++++++++
...

this DCC driver implements "one channel", but what about implementing
"multiple channels". For example reserve few(3) bits for channel number,
and two bits for carried data, then fill the rest bytes with with some data
and send the word(32 bits) over DCC. On the Linux side writing on /dev/hvcX
puts the number X as channel number, and on the other side the CPU
emulator gets the data and redistribute it to TCP/IP socket.

I have started write some code implementing this. Are there any one 
interested
in this multiple channels, and are there any one started to work on it?


Regards,
Asen

  parent reply	other threads:[~2011-04-07 18:39 UTC|newest]

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-30 19:25 [PATCH] drivers: char: hvc: add arm JTAG DCC console support Daniel Walker
2010-11-30 19:25 ` Daniel Walker
2010-11-30 19:57 ` Nicolas Pitre
2010-11-30 19:57   ` Nicolas Pitre
2010-11-30 21:17   ` Arnd Bergmann
2010-11-30 21:17     ` Arnd Bergmann
2010-12-01  5:30 ` Stephen Boyd
2010-12-01  5:30   ` Stephen Boyd
2010-12-01 18:54   ` Daniel Walker
2010-12-01 18:54     ` Daniel Walker
2010-12-01 19:28     ` Greg KH
2010-12-01 19:28       ` Greg KH
2010-12-18  5:16       ` [PATCH] hvc_dcc: Simplify assembly for v6 and v7 ARM Stephen Boyd
2010-12-18  5:16         ` Stephen Boyd
2010-12-20 17:51         ` Daniel Walker
2010-12-20 17:51           ` Daniel Walker
2010-12-20 18:39           ` Stephen Boyd
2010-12-20 18:39             ` Stephen Boyd
2010-12-20 18:46             ` Nicolas Pitre
2010-12-20 18:46               ` Nicolas Pitre
2010-12-20 20:08         ` [PATCH 0/3] hvc_dcc cleanups and fixes Stephen Boyd
2010-12-20 20:08           ` Stephen Boyd
2010-12-20 20:08           ` [PATCH 1/3] hvc_dcc: Fix bad code generation by marking assembly volatile Stephen Boyd
2010-12-20 20:08             ` Stephen Boyd
2010-12-20 21:39             ` Nicolas Pitre
2010-12-20 21:39               ` Nicolas Pitre
2011-01-02  9:00               ` Pavel Machek
2011-01-02  9:00                 ` Pavel Machek
2011-01-02 18:49                 ` David Brown
2011-01-02 18:49                   ` David Brown
2011-01-03  5:50                   ` Pavel Machek
2011-01-03  5:50                     ` Pavel Machek
2011-01-04 18:49               ` Tony Lindgren
2011-01-04 18:49                 ` Tony Lindgren
2010-12-20 21:49             ` Arnaud Lacombe
2010-12-20 21:49               ` Arnaud Lacombe
2010-12-20 21:52               ` Stephen Boyd
2010-12-20 21:52                 ` Stephen Boyd
2010-12-20 22:10                 ` Nicolas Pitre
2010-12-20 22:10                   ` Nicolas Pitre
2010-12-20 20:08           ` [PATCH 2/3] hvc_dcc: Simplify put_chars()/get_chars() loops Stephen Boyd
2010-12-20 20:08             ` Stephen Boyd
2010-12-20 20:08           ` [PATCH 3/3] hvc_dcc: Simplify assembly for v6 and v7 ARM Stephen Boyd
2010-12-20 20:08             ` Stephen Boyd
2010-12-20 21:44             ` Nicolas Pitre
2010-12-20 21:44               ` Nicolas Pitre
2011-01-04 18:52               ` Tony Lindgren
2011-01-04 18:52                 ` Tony Lindgren
2011-01-06  1:49           ` [PATCH 0/3] hvc_dcc cleanups and fixes Stephen Boyd
2011-01-06  1:49             ` Stephen Boyd
2011-01-06  3:20             ` Greg KH
2011-01-06  3:20               ` Greg KH
2011-02-03 22:17           ` Greg KH
2011-02-03 22:17             ` Greg KH
2011-02-03 22:17             ` Greg KH
2011-02-03 23:19             ` Stephen Boyd
2011-02-03 23:19               ` Stephen Boyd
2011-02-03 23:30               ` Greg KH
2011-02-03 23:30                 ` Greg KH
2011-02-03 23:48             ` [PATCHv2 " Stephen Boyd
2011-02-03 23:48               ` Stephen Boyd
2011-02-03 23:48               ` [PATCHv2 1/3] hvc_dcc: Fix bad code generation by marking assembly volatile Stephen Boyd
2011-02-03 23:48                 ` Stephen Boyd
2011-02-03 23:48               ` [PATCHv2 2/3] hvc_dcc: Simplify put_chars()/get_chars() loops Stephen Boyd
2011-02-03 23:48                 ` Stephen Boyd
2011-02-03 23:48               ` [PATCHv2 3/3] hvc_dcc: Simplify assembly for v6 and v7 ARM Stephen Boyd
2011-02-03 23:48                 ` Stephen Boyd
2010-12-01 20:20     ` [PATCH] drivers: char: hvc: add arm JTAG DCC console support Stephen Boyd
2010-12-01 20:20       ` Stephen Boyd
2010-12-07 19:10       ` Stephen Boyd
2010-12-07 19:10         ` Stephen Boyd
2011-01-14 19:19         ` Tony Lindgren
2011-01-14 19:19           ` Tony Lindgren
2011-01-14 23:49           ` Stephen Boyd
2011-01-14 23:49             ` Stephen Boyd
2011-04-07 18:39 ` RONETIX - Asen Dimov [this message]
2011-04-07 18:39   ` RONETIX - Asen Dimov
2011-04-07 18:57   ` Mike Frysinger
2011-04-07 18:57     ` Mike Frysinger
2020-02-01  5:06 reinaldo rojas

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