scsi: docs: convert sym53c500_cs.txt to ReST

Link: https://lore.kernel.org/r/eff6166b3442ddb37b934bca46e7f9ef25ebc2a4.1583136624.git.mchehab+huawei@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/Documentation/scsi/sym53c500_cs.rst b/Documentation/scsi/sym53c500_cs.rst
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+.. SPDX-License-Identifier: GPL-2.0
+
+=======================
+The sym53c500_cs Driver
+=======================
+
+The sym53c500_cs driver originated as an add-on to David Hinds' pcmcia-cs
+package, and was written by Tom Corner (tcorner@via.at).  A rewrite was
+long overdue, and the current version addresses the following concerns:
+
+	(1) extensive kernel changes between 2.4 and 2.6.
+	(2) deprecated PCMCIA support outside the kernel.
+
+All the USE_BIOS code has been ripped out.  It was never used, and could
+not have worked anyway.  The USE_DMA code is likewise gone.  Many thanks
+to YOKOTA Hiroshi (nsp_cs driver) and David Hinds (qlogic_cs driver) for
+the code fragments I shamelessly adapted for this work.  Thanks also to
+Christoph Hellwig for his patient tutelage while I stumbled about.
+
+The Symbios Logic 53c500 chip was used in the "newer" (circa 1997) version
+of the New Media Bus Toaster PCMCIA SCSI controller.  Presumably there are
+other products using this chip, but I've never laid eyes (much less hands)
+on one.
+
+Through the years, there have been a number of downloads of the pcmcia-cs
+version of this driver, and I guess it worked for those users.  It worked
+for Tom Corner, and it works for me.  Your mileage will probably vary.
+
+Bob Tracy (rct@frus.com)