linux-kernel - [PATCH] SH/Dreamcast - add support for GD-Rom device

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Message-ID: <8b67d60712261726l28960f69u2eb2756a6f5176e1@mail.gmail.com>
Date:	Thu, 27 Dec 2007 01:26:47 +0000
From:	"Adrian McMenamin" <lkmladrian@...il.com>
To:	"Paul Mundt" <lethal@...ux-sh.org>,
	"Jens Axboe" <jens.axboe@...cle.com>
Cc:	linux-kernel@...r.kernel.org, linux-sh@...r.kernel.org
Subject: [PATCH] SH/Dreamcast - add support for GD-Rom device

This patch adds support for the CD-Rom drive on the SEGA Dreamcast.

The SEGA Dreamcast has a built in CD-Rom drive, electrically similar
to an ATA-3 drive, but implementing a proprietary packet interface -
the so-called Sega Packet Interface (SPI)- and also supporting a
proprietary format of disk - the Giga Disk Rom, with a 1GB capacity.
The drive is know as the "GD-Rom drive".

This patch partially implements the SPI and also supports reading GD
Rom disks. Unlike previous GD Rom drivers (which were never in the
mainline), this driver implements DMA and not PIO for reads. It is a
new driver, not a modified version of previous drivers.

This is the fourth iteration of this patch - which should work with
both 2.6-24-rc5 and Paul Mundt's 2.6.25 queue.

Signed-off by: Adrian McMenamin <adrian@...en.demon.co.uk>

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View attachment "gdrom.patch" of type "text/x-patch" (23958 bytes)