SCSI: Remove AM53c974 driver

It hasn't compiled for ages and no-one seems to care ...

Documentation/scsi/AM53C974.txt

-SUBJECT
--------
-AM53/79C974 PC-SCSI Driver
-
-
-DISCLAIMER
-----------
-***  THIS SHOULD BE CONSIDERED AS BETA SOFTWARE  ***
-***  USE AT YOUR OWN RISK!                       ***
-
-
-Copyright
----------
-The architecture and much of the code of this device driver was 
-originally developed by Drew Eckhardt for the NCR5380. The 
-following copyrights apply:
-
-For the architecture and all pieces of code which can also be found 
-in the NCR5380 device driver:
-Copyright 1993, Drew Eckhardt
-  Visionary Computing 
-  (Unix and Linux consulting and custom programming)
-  drew@colorado.edu
-  +1 (303) 666-5836
- 
-The AM53C974_nobios_detect code was originally developed by
-Robin Cutshaw (robin@xfree86.org) and is used here in a 
-slightly modified form.
- 
-For the remaining code:
-  Copyright 1994, D. Frieauff
-  EMail: fri@rsx42sun0.dofn.de
-  Phone: x49-7545-8-2256 , x49-7541-42305
-
-
-Version
--------
-AM53/79C974 (PC-SCSI) Linux driver ALPHA release 0.5, 19 November 1995
-
-
-Changelog
----------
-0.1 -> 0.2: 
-  - Extended message handling re-written to eliminate 'invalid message 17' bug
-  - Parameters of AM53C974_intr adapted
-  - Debug messages structured
-  - Spelling improved
-0.2 -> 0.3:
-  - README file updated -- please read this file up to the end!
-  - Automatic scanning of io_port and irq implemented; no need for BIOS32 
-    anymore
-  - Improved configuration (now via LILO parameter string)
-  - Cleanup of probing and initialization code
-  - Improved sync. negotiation (can be setup individually for every device)
-  - Improved/ debugged code for reception of ext. messages
-0.3 -> 0.4:
-  - Improved PCI probing and initialization code
-  - Compatibility changes for Linux 1.3.x
-0.4 -> 0.5:
-  - Compatibility changes for Linux 1.3.42
-
-
-Bugs & Todo
------------
- - Add proc info function
- - Support SCSI-2 tagged queuing
- - Finalize abort code 
-
-
-Features
---------
-This driver supports asynchronous and synchronous SCSI-I and SCSI-II
-devices.  It is capable of transfer rate and synchronous negotiation
-(see below).  The driver supports scatter-gather.  Transfers are DMA
-based, but do not (yet) make use of the AM53/79C974 MDL mode.
-Max. transfer rate is 10MHz (whatever this is in real life).  The
-transfer rate is negotiated with each device (see dmesg output).  The
-AM53/79C974 has a 96-byte DMA FIFO to the PCI bus and a 16-byte SCSI
-FIFO.  It provides active negation and glitch suppression functions.
-Burst DMA transfer rate is 132 MBytes/sec.
-
-
-Configuration
--------------
-
-The following communication characteristics can be set individually
-for every SCSI device on the bus:
-
-  - enable/disable sync. negotiation
-  - transfer rate
-  - asynchronous or synchronous communication
-  - in case of sync. communication, the sync. offset
-
-The sync. offset specifies the number of bytes that can be sent or 
-received from the SCSI bus without ACK resp. REQ signal.
-CAUTION: USING SYNCHRONOUS MODE ON LONG SCSI CABLES MAY CAUSE 
-         COMMUNICATION PROBLEMS LEADING TO LOSS OF DATA. 
-
-The default setting of the SCSI communication parameters is as follows:
-  - no negotiation
-  - 5.0 MHz transfer rate
-  - asynchronous mode
-  - zero offset
-
-The parameters can be modified by passing a string with the following
-syntax to the kernel:
-
-	AM53C974=host-scsi-id,target-scsi-id,max-rate,max-offset
-
-The parameters will be used by the driver as negotiation basis.  The
-range of the rate parameter is 3 to 10 MHz.  The range of the
-sync. offset parameter is 0 to 15 bytes. A value of 0 denotes
-asynchronous comm. mode.  If the target cannot cope with the specified
-transfer rate, sync. mode or sync.  offset, the negotiation result
-will differ from the specified values.  The negotiation result is
-printed out at the end of the negotiation process (to read it, use the
-dmesg program or the appropriate syslog).  The parameter strings
-(blank separated) can be passed to the kernel at the LILO prompt, or
-as part of the LILO configuration file.
-
-For example, the string "AM53C974=7,2,8,15" would be interpreted as
-follows:
-
-For communication between the controller with SCSI-ID 7 and the
-device with SCSI-ID 2 a transfer rate of 8MHz in synchronous mode with
-max. 15 bytes offset should be negotiated.
-
-As an example, here my LILO configuration file:
-  boot = /dev/sda
-  compact
-  #prompt
-  delay = 50	# optional, for systems that boot very quickly
-  vga = normal	# force sane state
-  ramdisk = 0	# paranoia setting
-  root = current  # use "current" root
-  image = /usr/src/linux/arch/i386/boot/zImage
-    label = linux
-    append = "AM53C974=7,0,10,0 AM53C974=7,1,10,0 AM53C974=7,2,10,15 AM53C974=7,4,10,0 AM53C974=7,5,10,0"
-    read-only
-  other = /dev/sda4
-    label = os2
-  other = /dev/sdb3
-    loader = /boot/any_d.b
-    table = /dev/sdb
-    label = setup
-
-The same parameters at the LILO prompt:
-
-  LILO boot: linux AM53C974=7,0,10,0 AM53C974=7,1,10,0 AM53C974=7,2,10,15 AM53C974=7,4,10,0 AM53C974=7,5,10,0
-
-You can override parameters specified in the LILO configuration file
-by parameters specified on the LILO command line.
-
-
-BIOS usage
-----------
-Version 0.4 of the driver will use the BIOS, if available. Otherwise
-it will try its internal PCI scan and access routines.  The driver
-assumes that the controller's SCSI-ID (usually 7) has been correctly
-loaded by the BIOS into the controller's register during system
-boot. If the driver detects that the controller's SCSI ID is not '7'
-it will print out a warning. If this happens to you please correct
-setting of the controller's SCSI-ID. If it is wrong, then edit the
-AM53C974_SCSI_ID definition in file AM53C974.h accordingly.
-
-
-Test environment
-----------------
-This driver was tested on a Compaq XL566 with the following SCSI configuration:
-2 x HP C2247 fixed disk (internal, rate=10MHz, async.)
-1 x Micropolis 1624 fixed disk (external, rate=8MHz, sync., offset=15 bytes)
-1 x Wangtek W5525ES cartridge streamer (internal, rate=5MHz, async.)
-1 x Toshiba XM-3301B CD-ROM (external, rate=5MHz, async.)
-
-
-Known problems
---------------
- - Compaq/Matsushita CD-ROM:
-   Use of this device with AM53C974 driver version 0.2 caused the kernel to
-   hang during Linux boot. If you encounter the problem, don't enable sync.
-   negotiation with the CD-ROM, i.e. simply don't specify comm. parameters 
-   for this device on the LILO command line or configuration file. 
-   The driver will thus use its default for the CD-ROM, which is 5MHz 
-   transfer rate async and no sync. negotiation.
- - Some disks cause problems.
-
-
-What to do if there is a SCSI problem possibly related to the driver
---------------------------------------------------------------------
-
-Read Klaus Liedl's WWW page (http://www-c724.uibk.ac.at/XL/).  In case
-this does not help: Send me a complete description of the problem,
-including your SCSI configuration plus as much debugging information
-as possible.  Don't wait until I ask you for this information. To
-enable the generation of debugging output, remove the comments from
-the following definitions in the AM53C974.h file:
-
-    AM53C974_DEBUG
-    AM53C974_DEBUG_MSG
-    AM53C974_DEBUG_KEYWAIT
-    AM53C974_DEBUG_INFO
-    AM53C974_DEBUG_INTR
-
-With these definitions enabled, the driver will enter single-step mode
-during Linux boot. Use the spacebar for stepping.  Take note of at
-least the last 10 printout sections (marked by dashes) before the
-crash/hangup or whatever happens and send me all of this information
-via email. If the system can boot, use the syslogd daemon to record
-the debugging output. Maybe you can use the ramdisk for this purpose
-too (if necessary, kindly ask K. Liedl (Klaus.Liedl@uibk.ac.at) for
-support, he knows how to do it -- I never tried). Stay in email
-contact with me. Be aware that the following weeks/months could be the
-worst of your life.  Note: If single-stepping takes up too much time,
-you can try to let the driver catch the problem by pressing the 'r'
-key. The driver will automatically enter single-step mode if it has
-detected something weird.
-
-
-Author's Contact Address
------------------------
-Email: fri@rsx42sun0.dofn.de
-Phone: x49-7545-2256 (office), x49-7541-42305 (home)
-Home address: D. Frieauff, Stockerholzstr. 27, 88048 Friedrichshafen, Germany
-
-
-!!!! Important Notice !!!!
------------------------------
-- Klaus Liedl maintains an excellent WWW page about Linux on Compaq XL.
-  It includes an FAQ, lots of tips & tricks as well as downloadable 
-  boot disk images. The URL is: http://www-c724.uibk.ac.at/XL/
-- Volunteer wanted for further maintenance of this driver software. I
-  don't have the time anymore to do serious support as some of you will know.
-
-
-Literature
-----------
- - AMD AM53C974 PC-SCSI Technical Manual, publication #18624B
- - Amendment to the AMD AM53C974 PC-SCSI Technical Manual
- - AMD AM79C974 PC-NET Datasheet, publication #18681
- - Amendment to the AMD AM79C974 PC-NET Datasheet
-
-
-THANKS to
----------
- - Drew Eckhardt, Robin Cutshaw, K. Liedl, Robert J. Pappas, A. Grenier, 
-   Mark Stockton, David C. Niemi, Ben Craft, and many others who have helped

drivers/scsi/AM53C974.h

-/* AM53/79C974 (PCscsi) driver release 0.5
-
- * The architecture and much of the code of this device
- * driver was originally developed by Drew Eckhardt for
- * the NCR5380. The following copyrights apply:
- *  For the architecture and all parts similar to the NCR5380:
- *    Copyright 1993, Drew Eckhardt
- *      Visionary Computing 
- *      (Unix and Linux consulting and custom programming)
- *      drew@colorado.edu
- *      +1 (303) 666-5836
- *
- *  The AM53C974_nobios_detect code was originally developed by
- *   Robin Cutshaw (robin@xfree86.org) and is used here in a 
- *   modified form.
- *
- *  For the other parts:
- *    Copyright 1994, D. Frieauff
- *    EMail: fri@rsx42sun0.dofn.de
- *    Phone: x49-7545-8-2256 , x49-7541-42305
- */
-
-/*
- * $Log: AM53C974.h,v $
- */
-
-#ifndef AM53C974_H
-#define AM53C974_H
-
-#include <scsi/scsicam.h>
-
-struct AM53C974_hostdata {
-	volatile unsigned in_reset:1;	/* flag, says bus reset pending */
-	volatile unsigned aborted:1;	/* flag, says aborted */
-	volatile unsigned selecting:1;	/* selection started, but not yet finished */
-	volatile unsigned disconnecting: 1;	/* disconnection started, but not yet finished */
-	volatile unsigned dma_busy:1;	/* dma busy when service request for info transfer received */
-	volatile unsigned char msgout[10];	/* message to output in MSGOUT_PHASE */
-	volatile unsigned char last_message[10];	/* last message OUT */
-	volatile Scsi_Cmnd *issue_queue;	/* waiting to be issued */
-	volatile Scsi_Cmnd *disconnected_queue;		/* waiting for reconnect */
-	volatile Scsi_Cmnd *sel_cmd;	/* command for selection */
-	volatile Scsi_Cmnd *connected;	/* currently connected command */
-	volatile unsigned char busy[8];		/* index = target, bit = lun */
-	unsigned char sync_per[8];	/* synchronous transfer period (in effect) */
-	unsigned char sync_off[8];	/* synchronous offset (in effect) */
-	unsigned char sync_neg[8];	/* sync. negotiation performed (in effect) */
-	unsigned char sync_en[8];	/* sync. negotiation performed (in effect) */
-	unsigned char max_rate[8];	/* max. transfer rate (setup) */
-	unsigned char max_offset[8];	/* max. sync. offset (setup), only valid if corresponding sync_en is nonzero */
-};
-
-static int AM53C974_pci_detect(Scsi_Host_Template * tpnt);
-static int AM53C974_release(struct Scsi_Host *shp);
-static const char *AM53C974_info(struct Scsi_Host *);
-static int AM53C974_command(Scsi_Cmnd * SCpnt);
-static int AM53C974_queue_command(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *));
-static int AM53C974_abort(Scsi_Cmnd * cmd);
-static int AM53C974_reset(Scsi_Cmnd * cmd, unsigned int);
-
-#endif				/* AM53C974_H */

drivers/scsi/Kconfig

@@ -376,23 +376,6 @@ config SCSI_IN2000
 	  To compile this driver as a module, choose M here: the
 	  module will be called in2000.
 
-# does not use pci dma and seems to be onboard only for old machines
-config SCSI_AM53C974
-	tristate "AM53/79C974 PCI SCSI support"
-	depends on X86 && PCI && SCSI && BROKEN
-	---help---
-	  This is support for the AM53/79C974 SCSI host adapters.  Please read
-	  <file:Documentation/scsi/AM53C974.txt> for details.  Also, the
-	  SCSI-HOWTO, available from
-	  <http://www.tldp.org/docs.html#howto>, is for you.
-
-	  Note that there is another driver for AM53C974 based adapters:
-	  "Tekram DC390(T) and Am53/79C974 (PCscsi) SCSI support", above.  You
-	  can pick either one.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called AM53C974.
-
 config SCSI_MEGARAID
 	tristate "AMI MegaRAID support"
 	depends on PCI && SCSI

drivers/scsi/Makefile

@@ -86,7 +86,6 @@ obj-$(CONFIG_SCSI_IBMMCA)	+= ibmmca.o
 obj-$(CONFIG_SCSI_EATA)		+= eata.o
 obj-$(CONFIG_SCSI_DC395x)	+= dc395x.o
 obj-$(CONFIG_SCSI_DC390T)	+= tmscsim.o
-obj-$(CONFIG_SCSI_AM53C974)	+= AM53C974.o
 obj-$(CONFIG_SCSI_MEGARAID)	+= megaraid.o
 obj-$(CONFIG_SCSI_ACARD)	+= atp870u.o
 obj-$(CONFIG_SCSI_SUNESP)	+= esp.o