[PATCH] sym53c500_cs PCMCIA SCSI driver (round 5)

Fifth attempt at a PCMCIA SCSI driver for the Symbios 53c500
controller.  This version has all the cleanup Christoph has requested
to date, including removal of support for the obsolete (in 2.6)
proc_info functionality.

Support for additional sysfs class device attributes has been added:
two are read-only (irq, ioport), one is read-write (fast_pio).  The
read-write attribute is a per-instance flag indicating the PIO speed
of the particular HBA: valid values are 1 (enabled -- default) and 0
(disabled).

Documentation/scsi/00-INDEX

@@ -62,6 +62,8 @@ scsi_mid_low_api.txt
 	- info on API between SCSI layer and low level drivers
 st.txt
 	- info on scsi tape driver
+sym53c500_cs.txt
+	- info on PCMCIA driver for Symbios Logic 53c500 based adapters
 sym53c8xx_2.txt
 	- info on second generation driver for sym53c8xx based adapters
 tmscsim.txt

Documentation/scsi/sym53c500_cs.txt

+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)

drivers/scsi/pcmcia/Kconfig

@@ -69,4 +69,14 @@ config PCMCIA_QLOGIC
 	  To compile this driver as a module, choose M here: the
 	  module will be called qlogic_cs.
 
+config PCMCIA_SYM53C500
+	tristate "Symbios 53c500 PCMCIA support"
+	depends on m
+	help
+	  Say Y here if you have a New Media Bus Toaster or other PCMCIA
+	  SCSI adapter based on the Symbios 53c500 controller.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called sym53c500_cs.
+
 endmenu

drivers/scsi/pcmcia/Makefile

@@ -6,6 +6,7 @@ obj-$(CONFIG_PCMCIA_QLOGIC)	+= qlogic_cs.o
 obj-$(CONFIG_PCMCIA_FDOMAIN)	+= fdomain_cs.o
 obj-$(CONFIG_PCMCIA_AHA152X)	+= aha152x_cs.o
 obj-$(CONFIG_PCMCIA_NINJA_SCSI)	+= nsp_cs.o
+obj-$(CONFIG_PCMCIA_SYM53C500)	+= sym53c500_cs.o
 
 aha152x_cs-objs	:= aha152x_stub.o aha152x_core.o
 fdomain_cs-objs	:= fdomain_stub.o fdomain_core.o