scsi: delete the MCA specific drivers and driver code

The support for CONFIG_MCA is being removed, since the 20
year old hardware simply isn't capable of meeting today's
software demands on CPU and memory resources.

This commit removes the MCA specific SCSI drivers, and the
MCA specific portions of code in dual role ISA/MCA drivers.
Also, the MCA specific SCSI documentation is removed.

Cc: James Bottomley <JBottomley@parallels.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

1 files changed, 0 insertions, 2379 deletions

diff --git a/drivers/scsi/ibmmca.c b/drivers/scsi/ibmmca.c
deleted file mode 100644
index cd09132d5d7..00000000000
--- a/drivers/scsi/ibmmca.c
+++ /dev/null
@@ -1,2379 +0,0 @@
-/*
- Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for
- Linux Kernel >= 2.4.0.
- Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU
- General Public License. Written by Martin Kolinek, December 1995.
- Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang
- See the file Documentation/scsi/ibmmca.txt for a detailed description
- of this driver, the commandline arguments and the history of its
- development.
- See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
- updates, info and ADF-files for adapters supported by this driver.
-
- Alan Cox <alan@lxorguk.ukuu.org.uk>
- Updated for Linux 2.5.45 to use the new error handler, cleaned up the
- lock macros and did a few unavoidable locking tweaks, plus one locking
- fix in the irq and completion path.
- 
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/ctype.h>
-#include <linux/string.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/blkdev.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/mca.h>
-#include <linux/spinlock.h>
-#include <linux/init.h>
-
-#include <asm/io.h>
-
-#include "scsi.h"
-#include <scsi/scsi_host.h>
-
-/* Common forward declarations for all Linux-versions: */
-static int ibmmca_queuecommand (struct Scsi_Host *, struct scsi_cmnd *);
-static int ibmmca_abort (Scsi_Cmnd *);
-static int ibmmca_host_reset (Scsi_Cmnd *);
-static int ibmmca_biosparam (struct scsi_device *, struct block_device *, sector_t, int *);
-static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout);
-
-
-
-/* current version of this driver-source: */
-#define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac"
-
-/* driver configuration */
-#define IM_MAX_HOSTS     8	/* maximum number of host adapters */
-#define IM_RESET_DELAY	60	/* seconds allowed for a reset */
-
-/* driver debugging - #undef all for normal operation */
-/* if defined: count interrupts and ignore this special one: */
-#undef	IM_DEBUG_TIMEOUT	//50
-#define TIMEOUT_PUN	0
-#define TIMEOUT_LUN	0
-/* verbose interrupt: */
-#undef IM_DEBUG_INT
-/* verbose queuecommand: */
-#undef IM_DEBUG_CMD
-/* verbose queucommand for specific SCSI-device type: */
-#undef IM_DEBUG_CMD_SPEC_DEV
-/* verbose device probing */
-#undef IM_DEBUG_PROBE
-
-/* device type that shall be displayed on syslog (only during debugging): */
-#define IM_DEBUG_CMD_DEVICE	TYPE_TAPE
-
-/* relative addresses of hardware registers on a subsystem */
-#define IM_CMD_REG(h)	((h)->io_port)	/*Command Interface, (4 bytes long) */
-#define IM_ATTN_REG(h)	((h)->io_port+4)	/*Attention (1 byte) */
-#define IM_CTR_REG(h)	((h)->io_port+5)	/*Basic Control (1 byte) */
-#define IM_INTR_REG(h)	((h)->io_port+6)	/*Interrupt Status (1 byte, r/o) */
-#define IM_STAT_REG(h)	((h)->io_port+7)	/*Basic Status (1 byte, read only) */
-
-/* basic I/O-port of first adapter */
-#define IM_IO_PORT	0x3540
-/* maximum number of hosts that can be found */
-#define IM_N_IO_PORT	8
-
-/*requests going into the upper nibble of the Attention register */
-/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
-#define IM_IMM_CMD	0x10	/*immediate command */
-#define IM_SCB		0x30	/*Subsystem Control Block command */
-#define IM_LONG_SCB	0x40	/*long Subsystem Control Block command */
-#define IM_EOI		0xe0	/*end-of-interrupt request */
-
-/*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */
-#define IM_HW_RESET	0x80	/*hardware reset */
-#define IM_ENABLE_DMA	0x02	/*enable subsystem's busmaster DMA */
-#define IM_ENABLE_INTR	0x01	/*enable interrupts to the system */
-
-/*to interpret the upper nibble of Interrupt Status register */
-/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
-#define IM_SCB_CMD_COMPLETED			0x10
-#define IM_SCB_CMD_COMPLETED_WITH_RETRIES	0x50
-#define IM_LOOP_SCATTER_BUFFER_FULL		0x60
-#define IM_ADAPTER_HW_FAILURE			0x70
-#define IM_IMMEDIATE_CMD_COMPLETED		0xa0
-#define IM_CMD_COMPLETED_WITH_FAILURE		0xc0
-#define IM_CMD_ERROR				0xe0
-#define IM_SOFTWARE_SEQUENCING_ERROR		0xf0
-
-/*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */
-#define IM_CMD_REG_FULL		0x08
-#define IM_CMD_REG_EMPTY	0x04
-#define IM_INTR_REQUEST		0x02
-#define IM_BUSY			0x01
-
-/*immediate commands (word written into low 2 bytes of command reg) */
-#define IM_RESET_IMM_CMD	0x0400
-#define IM_FEATURE_CTR_IMM_CMD	0x040c
-#define IM_DMA_PACING_IMM_CMD	0x040d
-#define IM_ASSIGN_IMM_CMD	0x040e
-#define IM_ABORT_IMM_CMD	0x040f
-#define IM_FORMAT_PREP_IMM_CMD	0x0417
-
-/*SCB (Subsystem Control Block) structure */
-struct im_scb {
-	unsigned short command;	/*command word (read, etc.) */
-	unsigned short enable;	/*enable word, modifies cmd */
-	union {
-		unsigned long log_blk_adr;	/*block address on SCSI device */
-		unsigned char scsi_cmd_length;	/*6,10,12, for other scsi cmd */
-	} u1;
-	unsigned long sys_buf_adr;	/*physical system memory adr */
-	unsigned long sys_buf_length;	/*size of sys mem buffer */
-	unsigned long tsb_adr;	/*Termination Status Block adr */
-	unsigned long scb_chain_adr;	/*optional SCB chain address */
-	union {
-		struct {
-			unsigned short count;	/*block count, on SCSI device */
-			unsigned short length;	/*block length, on SCSI device */
-		} blk;
-		unsigned char scsi_command[12];	/*other scsi command */
-	} u2;
-};
-
-/*structure scatter-gather element (for list of system memory areas) */
-struct im_sge {
-	void *address;
-	unsigned long byte_length;
-};
-
-/*structure returned by a get_pos_info command: */
-struct im_pos_info {
-	unsigned short pos_id;	/* adapter id */
-	unsigned char pos_3a;	/* pos 3 (if pos 6 = 0) */
-	unsigned char pos_2;	/* pos 2 */
-	unsigned char int_level;	/* interrupt level IRQ 11 or 14 */
-	unsigned char pos_4a;	/* pos 4 (if pos 6 = 0) */
-	unsigned short connector_size;	/* MCA connector size: 16 or 32 Bit */
-	unsigned char num_luns;	/* number of supported luns per device */
-	unsigned char num_puns;	/* number of supported puns */
-	unsigned char pacing_factor;	/* pacing factor */
-	unsigned char num_ldns;	/* number of ldns available */
-	unsigned char eoi_off;	/* time EOI and interrupt inactive */
-	unsigned char max_busy;	/* time between reset and busy on */
-	unsigned short cache_stat;	/* ldn cachestat. Bit=1 = not cached */
-	unsigned short retry_stat;	/* retry status of ldns. Bit=1=disabled */
-	unsigned char pos_4b;	/* pos 4 (if pos 6 = 1) */
-	unsigned char pos_3b;	/* pos 3 (if pos 6 = 1) */
-	unsigned char pos_6;	/* pos 6 */
-	unsigned char pos_5;	/* pos 5 */
-	unsigned short max_overlap;	/* maximum overlapping requests */
-	unsigned short num_bus;	/* number of SCSI-busses */
-};
-
-/*values for SCB command word */
-#define IM_NO_SYNCHRONOUS      0x0040	/*flag for any command */
-#define IM_NO_DISCONNECT       0x0080	/*flag for any command */
-#define IM_READ_DATA_CMD       0x1c01
-#define IM_WRITE_DATA_CMD      0x1c02
-#define IM_READ_VERIFY_CMD     0x1c03
-#define IM_WRITE_VERIFY_CMD    0x1c04
-#define IM_REQUEST_SENSE_CMD   0x1c08
-#define IM_READ_CAPACITY_CMD   0x1c09
-#define IM_DEVICE_INQUIRY_CMD  0x1c0b
-#define IM_READ_LOGICAL_CMD    0x1c2a
-#define IM_OTHER_SCSI_CMD_CMD  0x241f
-
-/* unused, but supported, SCB commands */
-#define IM_GET_COMMAND_COMPLETE_STATUS_CMD   0x1c07	/* command status */
-#define IM_GET_POS_INFO_CMD                  0x1c0a	/* returns neat stuff */
-#define IM_READ_PREFETCH_CMD                 0x1c31	/* caching controller only */
-#define IM_FOMAT_UNIT_CMD                    0x1c16	/* format unit */
-#define IM_REASSIGN_BLOCK_CMD                0x1c18	/* in case of error */
-
-/*values to set bits in the enable word of SCB */
-#define IM_READ_CONTROL              0x8000
-#define IM_REPORT_TSB_ONLY_ON_ERROR  0x4000
-#define IM_RETRY_ENABLE              0x2000
-#define IM_POINTER_TO_LIST           0x1000
-#define IM_SUPRESS_EXCEPTION_SHORT   0x0400
-#define IM_BYPASS_BUFFER             0x0200
-#define IM_CHAIN_ON_NO_ERROR         0x0001
-
-/*TSB (Termination Status Block) structure */
-struct im_tsb {
-	unsigned short end_status;
-	unsigned short reserved1;
-	unsigned long residual_byte_count;
-	unsigned long sg_list_element_adr;
-	unsigned short status_length;
-	unsigned char dev_status;
-	unsigned char cmd_status;
-	unsigned char dev_error;
-	unsigned char cmd_error;
-	unsigned short reserved2;
-	unsigned short reserved3;
-	unsigned short low_of_last_scb_adr;
-	unsigned short high_of_last_scb_adr;
-};
-
-/*subsystem uses interrupt request level 14 */
-#define IM_IRQ     14
-/*SCSI-2 F/W may evade to interrupt 11 */
-#define IM_IRQ_FW  11
-
-/* Model 95 has an additional alphanumeric display, which can be used
-   to display SCSI-activities. 8595 models do not have any disk led, which
-   makes this feature quite useful.
-   The regular PS/2 disk led is turned on/off by bits 6,7 of system
-   control port. */
-
-/* LED display-port (actually, last LED on display) */
-#define MOD95_LED_PORT	   0x108
-/* system-control-register of PS/2s with diskindicator */
-#define PS2_SYS_CTR        0x92
-/* activity displaying methods */
-#define LED_DISP           1
-#define LED_ADISP          2
-#define LED_ACTIVITY       4
-/* failed intr */
-#define CMD_FAIL           255
-
-/* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED
-   displays. ldn is no longer displayed here, because the ldn mapping is now 
-   done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime 
-   or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble, 
-   interest, debugging or just for having fun. The left number gives the
-   host-adapter number and the right shows the accessed SCSI-ID. */
-
-/* display_mode is set by the ibmmcascsi= command line arg */
-static int display_mode = 0;
-/* set default adapter timeout */
-static unsigned int adapter_timeout = 45;
-/* for probing on feature-command: */
-static unsigned int global_command_error_excuse = 0;
-/* global setting by command line for adapter_speed */
-static int global_adapter_speed = 0;	/* full speed by default */
-
-/* Panel / LED on, do it right for F/W addressin, too. adisplay will
- * just ignore ids>7, as the panel has only 7 digits available */
-#define PS2_DISK_LED_ON(ad,id) { if (display_mode & LED_DISP) { if (id>9) \
-    outw((ad+48)|((id+55)<<8), MOD95_LED_PORT ); else \
-    outw((ad+48)|((id+48)<<8), MOD95_LED_PORT ); } else \
-    if (display_mode & LED_ADISP) { if (id<7) outb((char)(id+48),MOD95_LED_PORT+1+id); \
-    outb((char)(ad+48), MOD95_LED_PORT); } \
-    if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
-    outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); }
-
-/* Panel / LED off */
-/* bug fixed, Dec 15, 1997, where | was replaced by & here */
-#define PS2_DISK_LED_OFF() { if (display_mode & LED_DISP) \
-    outw(0x2020, MOD95_LED_PORT ); else if (display_mode & LED_ADISP) { \
-    outl(0x20202020,MOD95_LED_PORT); outl(0x20202020,MOD95_LED_PORT+4); } \
-    if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
-    outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); }
-
-/* types of different supported hardware that goes to hostdata special */
-#define IBM_SCSI2_FW     0
-#define IBM_7568_WCACHE  1
-#define IBM_EXP_UNIT     2
-#define IBM_SCSI_WCACHE  3
-#define IBM_SCSI         4
-#define IBM_INTEGSCSI	 5
-
-/* other special flags for hostdata structure */
-#define FORCED_DETECTION         100
-#define INTEGRATED_SCSI          101
-
-/* List of possible IBM-SCSI-adapters */
-static short ibmmca_id_table[] = {
-	0x8efc,
-	0x8efd,
-	0x8ef8,
-	0x8eff,
-	0x8efe,
-	/* No entry for integrated SCSI, that's part of the register */
-	0
-};
-
-static const char *ibmmca_description[] = {
-	"IBM SCSI-2 F/W Adapter",	/* special = 0 */
-	"IBM 7568 Industrial Computer SCSI Adapter w/Cache",	/* special = 1 */
-	"IBM Expansion Unit SCSI Controller",	/* special = 2 */
-	"IBM SCSI Adapter w/Cache",	/* special = 3 */
-	"IBM SCSI Adapter",	/* special = 4 */
-	"IBM Integrated SCSI Controller", /* special = 5 */
-};
-
-/* Max number of logical devices (can be up from 0 to 14).  15 is the address
-of the adapter itself. */
-#define MAX_LOG_DEV  15
-
-/*local data for a logical device */
-struct logical_device {
-	struct im_scb scb;	/* SCSI-subsystem-control-block structure */
-	struct im_tsb tsb;	/* SCSI command complete status block structure */
-	struct im_sge sge[16];	/* scatter gather list structure */
-	unsigned char buf[256];	/* SCSI command return data buffer */
-	Scsi_Cmnd *cmd;		/* SCSI-command that is currently in progress */
-	int device_type;	/* type of the SCSI-device. See include/scsi/scsi.h
-				   for interpretation of the possible values */
-	int block_length;	/* blocksize of a particular logical SCSI-device */
-	int cache_flag;		/* 1 if this is uncached, 0 if cache is present for ldn */
-	int retry_flag;		/* 1 if adapter retry is disabled, 0 if enabled */
-};
-
-/* statistics of the driver during operations (for proc_info) */
-struct Driver_Statistics {
-	/* SCSI statistics on the adapter */
-	int ldn_access[MAX_LOG_DEV + 1];	/* total accesses on a ldn */
-	int ldn_read_access[MAX_LOG_DEV + 1];	/* total read-access on a ldn */
-	int ldn_write_access[MAX_LOG_DEV + 1];	/* total write-access on a ldn */
-	int ldn_inquiry_access[MAX_LOG_DEV + 1];	/* total inquiries on a ldn */
-	int ldn_modeselect_access[MAX_LOG_DEV + 1];	/* total mode selects on ldn */
-	int scbs;		/* short SCBs queued */
-	int long_scbs;		/* long SCBs queued */
-	int total_accesses;	/* total accesses on all ldns */
-	int total_interrupts;	/* total interrupts (should be
-				   same as total_accesses) */
-	int total_errors;	/* command completed with error */
-	/* dynamical assignment statistics */
-	int total_scsi_devices;	/* number of physical pun,lun */
-	int dyn_flag;		/* flag showing dynamical mode */
-	int dynamical_assignments;	/* number of remappings of ldns */
-	int ldn_assignments[MAX_LOG_DEV + 1];	/* number of remappings of each
-						   ldn */
-};
-
-/* data structure for each host adapter */
-struct ibmmca_hostdata {
-	/* array of logical devices: */
-	struct logical_device _ld[MAX_LOG_DEV + 1];
-	/* array to convert (pun, lun) into logical device number: */
-	unsigned char _get_ldn[16][8];
-	/*array that contains the information about the physical SCSI-devices
-	   attached to this host adapter: */
-	unsigned char _get_scsi[16][8];
-	/* used only when checking logical devices: */
-	int _local_checking_phase_flag;
-	/* report received interrupt: */
-	int _got_interrupt;
-	/* report termination-status of SCSI-command: */
-	int _stat_result;
-	/* reset status (used only when doing reset): */
-	int _reset_status;
-	/* code of the last SCSI command (needed for panic info): */
-	int _last_scsi_command[MAX_LOG_DEV + 1];
-	/* identifier of the last SCSI-command type */
-	int _last_scsi_type[MAX_LOG_DEV + 1];
-	/* last blockcount */
-	int _last_scsi_blockcount[MAX_LOG_DEV + 1];
-	/* last locgical block address */
-	unsigned long _last_scsi_logical_block[MAX_LOG_DEV + 1];
-	/* Counter that points on the next reassignable ldn for dynamical
-	   remapping. The default value is 7, that is the first reassignable
-	   number in the list at boottime: */
-	int _next_ldn;
-	/* Statistics-structure for this IBM-SCSI-host: */
-	struct Driver_Statistics _IBM_DS;
-	/* This hostadapters pos-registers pos2 until pos6 */
-	unsigned int _pos[8];
-	/* assign a special variable, that contains dedicated info about the
-	   adaptertype */
-	int _special;
-	/* connector size on the MCA bus */
-	int _connector_size;
-	/* synchronous SCSI transfer rate bitpattern */
-	int _adapter_speed;
-};
-
-/* macros to access host data structure */
-#define subsystem_pun(h) ((h)->this_id)
-#define subsystem_maxid(h) ((h)->max_id)
-#define ld(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_ld)
-#define get_ldn(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_get_ldn)
-#define get_scsi(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_get_scsi)
-#define local_checking_phase_flag(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_local_checking_phase_flag)
-#define got_interrupt(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_got_interrupt)
-#define stat_result(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_stat_result)
-#define reset_status(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_reset_status)
-#define last_scsi_command(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_command)
-#define last_scsi_type(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_type)
-#define last_scsi_blockcount(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_blockcount)
-#define last_scsi_logical_block(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_logical_block)
-#define last_scsi_type(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_type)
-#define next_ldn(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_next_ldn)
-#define IBM_DS(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_IBM_DS)
-#define special(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_special)
-#define subsystem_connector_size(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_connector_size)
-#define adapter_speed(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_adapter_speed)
-#define pos2(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[2])
-#define pos3(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[3])
-#define pos4(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[4])
-#define pos5(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[5])
-#define pos6(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[6])
-
-/* Define a arbitrary number as subsystem-marker-type. This number is, as
-   described in the ANSI-SCSI-standard, not occupied by other device-types. */
-#define TYPE_IBM_SCSI_ADAPTER   0x2F
-
-/* Define 0xFF for no device type, because this type is not defined within
-   the ANSI-SCSI-standard, therefore, it can be used and should not cause any
-   harm. */
-#define TYPE_NO_DEVICE          0xFF
-
-/* define medium-changer. If this is not defined previously, e.g. Linux
-   2.0.x, define this type here. */
-#ifndef TYPE_MEDIUM_CHANGER
-#define TYPE_MEDIUM_CHANGER     0x08
-#endif
-
-/* define possible operations for the immediate_assign command */
-#define SET_LDN        0
-#define REMOVE_LDN     1
-
-/* ldn which is used to probe the SCSI devices */
-#define PROBE_LDN      0
-
-/* reset status flag contents */
-#define IM_RESET_NOT_IN_PROGRESS         0
-#define IM_RESET_IN_PROGRESS             1
-#define IM_RESET_FINISHED_OK             2
-#define IM_RESET_FINISHED_FAIL           3
-#define IM_RESET_NOT_IN_PROGRESS_NO_INT  4
-#define IM_RESET_FINISHED_OK_NO_INT      5
-
-/* define undefined SCSI-command */
-#define NO_SCSI                  0xffff
-
-/*-----------------------------------------------------------------------*/
-
-/* if this is nonzero, ibmmcascsi option has been passed to the kernel */
-static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 };
-static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 };
-
-/* fill module-parameters only, when this define is present.
-   (that is kernel version 2.1.x) */
-#if defined(MODULE)
-static char *boot_options = NULL;
-module_param(boot_options, charp, 0);
-module_param_array(io_port, int, NULL, 0);
-module_param_array(scsi_id, int, NULL, 0);
-
-MODULE_LICENSE("GPL");
-#endif
-/*counter of concurrent disk read/writes, to turn on/off disk led */
-static int disk_rw_in_progress = 0;
-
-static unsigned int pos[8];	/* whole pos register-line for diagnosis */
-/* Taking into account the additions, made by ZP Gu.
- * This selects now the preset value from the configfile and
- * offers the 'normal' commandline option to be accepted */
-#ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD
-static char ibm_ansi_order = 1;
-#else
-static char ibm_ansi_order = 0;
-#endif
-
-static void issue_cmd(struct Scsi_Host *, unsigned long, unsigned char);
-static void internal_done(Scsi_Cmnd * cmd);
-static void check_devices(struct Scsi_Host *, int);
-static int immediate_assign(struct Scsi_Host *, unsigned int, unsigned int, unsigned int, unsigned int);
-static int immediate_feature(struct Scsi_Host *, unsigned int, unsigned int);
-#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
-static int immediate_reset(struct Scsi_Host *, unsigned int);
-#endif
-static int device_inquiry(struct Scsi_Host *, int);
-static int read_capacity(struct Scsi_Host *, int);
-static int get_pos_info(struct Scsi_Host *);
-static char *ti_p(int);
-static char *ti_l(int);
-static char *ibmrate(unsigned int, int);
-static int probe_display(int);
-static int probe_bus_mode(struct Scsi_Host *);
-static int device_exists(struct Scsi_Host *, int, int *, int *);
-static int option_setup(char *);
-/* local functions needed for proc_info */
-static int ldn_access_load(struct Scsi_Host *, int);
-static int ldn_access_total_read_write(struct Scsi_Host *);
-
-static irqreturn_t interrupt_handler(int irq, void *dev_id)
-{
-	unsigned int intr_reg;
-	unsigned int cmd_result;
-	unsigned int ldn;
-	unsigned long flags;
-	Scsi_Cmnd *cmd;
-	int lastSCSI;
-	struct device *dev = dev_id;
-	struct Scsi_Host *shpnt = dev_get_drvdata(dev);
-
-	spin_lock_irqsave(shpnt->host_lock, flags);
-
-	if(!(inb(IM_STAT_REG(shpnt)) & IM_INTR_REQUEST)) {
-		spin_unlock_irqrestore(shpnt->host_lock, flags);
-		return IRQ_NONE;
-	}
-
-	/* the reset-function already did all the job, even ints got
-	   renabled on the subsystem, so just return */
-	if ((reset_status(shpnt) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(shpnt) == IM_RESET_FINISHED_OK_NO_INT)) {
-		reset_status(shpnt) = IM_RESET_NOT_IN_PROGRESS;
-		spin_unlock_irqrestore(shpnt->host_lock, flags);
-		return IRQ_HANDLED;
-	}
-
-	/*must wait for attention reg not busy, then send EOI to subsystem */
-	while (1) {
-		if (!(inb(IM_STAT_REG(shpnt)) & IM_BUSY))
-			break;
-		cpu_relax();
-	}
-
-	/*get command result and logical device */
-	intr_reg = (unsigned char) (inb(IM_INTR_REG(shpnt)));
-	cmd_result = intr_reg & 0xf0;
-	ldn = intr_reg & 0x0f;
-	/* get the last_scsi_command here */
-	lastSCSI = last_scsi_command(shpnt)[ldn];
-	outb(IM_EOI | ldn, IM_ATTN_REG(shpnt));
-	
-	/*these should never happen (hw fails, or a local programming bug) */
-	if (!global_command_error_excuse) {
-		switch (cmd_result) {
-			/* Prevent from Ooopsing on error to show the real reason */
-		case IM_ADAPTER_HW_FAILURE:
-		case IM_SOFTWARE_SEQUENCING_ERROR:
-		case IM_CMD_ERROR:
-			printk(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n");
-			printk(KERN_ERR "              Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(shpnt)[ldn].scb.enable);
-			if (ld(shpnt)[ldn].cmd)
-				printk("%ld/%ld,", (long) (scsi_bufflen(ld(shpnt)[ldn].cmd)), (long) (ld(shpnt)[ldn].scb.sys_buf_length));
-			else
-				printk("none,");
-			if (ld(shpnt)[ldn].cmd)
-				printk("Blocksize=%d", ld(shpnt)[ldn].scb.u2.blk.length);
-			else
-				printk("Blocksize=none");
-			printk(", host=%p, ldn=0x%x\n", shpnt, ldn);
-			if (ld(shpnt)[ldn].cmd) {
-				printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(shpnt)[ldn], ld(shpnt)[ldn].scb.u2.blk.count);
-				printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(shpnt)[ldn], ld(shpnt)[ldn].scb.u1.log_blk_adr);
-			}
-			printk(KERN_ERR "Reason given: %s\n", (cmd_result == IM_ADAPTER_HW_FAILURE) ? "HARDWARE FAILURE" : (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR) ? "SOFTWARE SEQUENCING ERROR" : (cmd_result == IM_CMD_ERROR) ? "COMMAND ERROR" : "UNKNOWN");
-			/* if errors appear, enter this section to give detailed info */
-			printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n");
-			printk(KERN_ERR "              Command Type................: %x\n", last_scsi_type(shpnt)[ldn]);
-			printk(KERN_ERR "              Attention Register..........: %x\n", inb(IM_ATTN_REG(shpnt)));
-			printk(KERN_ERR "              Basic Control Register......: %x\n", inb(IM_CTR_REG(shpnt)));
-			printk(KERN_ERR "              Interrupt Status Register...: %x\n", intr_reg);
-			printk(KERN_ERR "              Basic Status Register.......: %x\n", inb(IM_STAT_REG(shpnt)));
-			if ((last_scsi_type(shpnt)[ldn] == IM_SCB) || (last_scsi_type(shpnt)[ldn] == IM_LONG_SCB)) {
-				printk(KERN_ERR "              SCB-Command.................: %x\n", ld(shpnt)[ldn].scb.command);
-				printk(KERN_ERR "              SCB-Enable..................: %x\n", ld(shpnt)[ldn].scb.enable);
-				printk(KERN_ERR "              SCB-logical block address...: %lx\n", ld(shpnt)[ldn].scb.u1.log_blk_adr);
-				printk(KERN_ERR "              SCB-system buffer address...: %lx\n", ld(shpnt)[ldn].scb.sys_buf_adr);
-				printk(KERN_ERR "              SCB-system buffer length....: %lx\n", ld(shpnt)[ldn].scb.sys_buf_length);
-				printk(KERN_ERR "              SCB-tsb address.............: %lx\n", ld(shpnt)[ldn].scb.tsb_adr);
-				printk(KERN_ERR "              SCB-Chain address...........: %lx\n", ld(shpnt)[ldn].scb.scb_chain_adr);
-				printk(KERN_ERR "              SCB-block count.............: %x\n", ld(shpnt)[ldn].scb.u2.blk.count);
-				printk(KERN_ERR "              SCB-block length............: %x\n", ld(shpnt)[ldn].scb.u2.blk.length);
-			}
-			printk(KERN_ERR "              Send this report to the maintainer.\n");
-			panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result);
-			break;
-		}
-	} else {
-		/* The command error handling is made silent, but we tell the
-		 * calling function, that there is a reported error from the
-		 * adapter. */
-		switch (cmd_result) {
-		case IM_ADAPTER_HW_FAILURE:
-		case IM_SOFTWARE_SEQUENCING_ERROR:
-		case IM_CMD_ERROR:
-			global_command_error_excuse = CMD_FAIL;
-			break;
-		default:
-			global_command_error_excuse = 0;
-			break;
-		}
-	}
-	/* if no panic appeared, increase the interrupt-counter */
-	IBM_DS(shpnt).total_interrupts++;
-	/*only for local checking phase */
-	if (local_checking_phase_flag(shpnt)) {
-		stat_result(shpnt) = cmd_result;
-		got_interrupt(shpnt) = 1;
-		reset_status(shpnt) = IM_RESET_FINISHED_OK;
-		last_scsi_command(shpnt)[ldn] = NO_SCSI;
-		spin_unlock_irqrestore(shpnt->host_lock, flags);
-		return IRQ_HANDLED;
-	}
-	/* handling of commands coming from upper level of scsi driver */
-	if (last_scsi_type(shpnt)[ldn] == IM_IMM_CMD) {
-		/* verify ldn, and may handle rare reset immediate command */
-		if ((reset_status(shpnt) == IM_RESET_IN_PROGRESS) && (last_scsi_command(shpnt)[ldn] == IM_RESET_IMM_CMD)) {
-			if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
-				disk_rw_in_progress = 0;
-				PS2_DISK_LED_OFF();
-				reset_status(shpnt) = IM_RESET_FINISHED_FAIL;
-			} else {
-				/*reset disk led counter, turn off disk led */
-				disk_rw_in_progress = 0;
-				PS2_DISK_LED_OFF();
-				reset_status(shpnt) = IM_RESET_FINISHED_OK;
-			}
-			stat_result(shpnt) = cmd_result;
-			last_scsi_command(shpnt)[ldn] = NO_SCSI;
-			last_scsi_type(shpnt)[ldn] = 0;
-			spin_unlock_irqrestore(shpnt->host_lock, flags);
-			return IRQ_HANDLED;
-		} else if (last_scsi_command(shpnt)[ldn] == IM_ABORT_IMM_CMD) {
-			/* react on SCSI abort command */
-#ifdef IM_DEBUG_PROBE
-			printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n");
-#endif
-			disk_rw_in_progress = 0;
-			PS2_DISK_LED_OFF();
-			cmd = ld(shpnt)[ldn].cmd;
-			ld(shpnt)[ldn].cmd = NULL;
-			if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
-				cmd->result = DID_NO_CONNECT << 16;
-			else
-				cmd->result = DID_ABORT << 16;
-			stat_result(shpnt) = cmd_result;
-			last_scsi_command(shpnt)[ldn] = NO_SCSI;
-			last_scsi_type(shpnt)[ldn] = 0;
-			if (cmd->scsi_done)
-				(cmd->scsi_done) (cmd);	/* should be the internal_done */
-			spin_unlock_irqrestore(shpnt->host_lock, flags);
-			return IRQ_HANDLED;
-		} else {
-			disk_rw_in_progress = 0;
-			PS2_DISK_LED_OFF();
-			reset_status(shpnt) = IM_RESET_FINISHED_OK;
-			stat_result(shpnt) = cmd_result;
-			last_scsi_command(shpnt)[ldn] = NO_SCSI;
-			spin_unlock_irqrestore(shpnt->host_lock, flags);
-			return IRQ_HANDLED;
-		}
-	}
-	last_scsi_command(shpnt)[ldn] = NO_SCSI;
-	last_scsi_type(shpnt)[ldn] = 0;
-	cmd = ld(shpnt)[ldn].cmd;
-	ld(shpnt)[ldn].cmd = NULL;
-#ifdef IM_DEBUG_TIMEOUT
-	if (cmd) {
-		if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) {
-			spin_unlock_irqsave(shpnt->host_lock, flags);
-			printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun);
-			return IRQ_HANDLED;
-		}
-	}
-#endif
-	/*if no command structure, just return, else clear cmd */
-	if (!cmd)
-	{
-		spin_unlock_irqrestore(shpnt->host_lock, flags);
-		return IRQ_HANDLED;
-	}
-
-#ifdef IM_DEBUG_INT
-	printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n", cmd->cmnd[0], intr_reg, ld(shpnt)[ldn].tsb.dev_status, ld(shpnt)[ldn].tsb.cmd_status, ld(shpnt)[ldn].tsb.dev_error, ld(shpnt)[ldn].tsb.cmd_error);
-#endif
-	/*if this is end of media read/write, may turn off PS/2 disk led */
-	if ((ld(shpnt)[ldn].device_type != TYPE_NO_LUN) && (ld(shpnt)[ldn].device_type != TYPE_NO_DEVICE)) {
-		/* only access this, if there was a valid device addressed */
-		if (--disk_rw_in_progress == 0)
-			PS2_DISK_LED_OFF();
-	}
-
-	/* IBM describes the status-mask to be 0x1e, but this is not conform
-	 * with SCSI-definition, I suppose, the reason for it is that IBM
-	 * adapters do not support CMD_TERMINATED, TASK_SET_FULL and
-	 * ACA_ACTIVE as returning statusbyte information. (ML) */
-	if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
-		cmd->result = (unsigned char) (ld(shpnt)[ldn].tsb.dev_status & 0x1e);
-		IBM_DS(shpnt).total_errors++;
-	} else
-		cmd->result = 0;
-	/* write device status into cmd->result, and call done function */
-	if (lastSCSI == NO_SCSI) {	/* unexpected interrupt :-( */
-		cmd->result |= DID_BAD_INTR << 16;
-		printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n");
-	} else			/* things went right :-) */
-		cmd->result |= DID_OK << 16;
-	if (cmd->scsi_done)
-		(cmd->scsi_done) (cmd);
-	spin_unlock_irqrestore(shpnt->host_lock, flags);
-	return IRQ_HANDLED;
-}
-
-static void issue_cmd(struct Scsi_Host *shpnt, unsigned long cmd_reg,
-		      unsigned char attn_reg)
-{
-	unsigned long flags;
-	/* must wait for attention reg not busy */
-	while (1) {
-		spin_lock_irqsave(shpnt->host_lock, flags);
-		if (!(inb(IM_STAT_REG(shpnt)) & IM_BUSY))
-			break;
-		spin_unlock_irqrestore(shpnt->host_lock, flags);
-	}
-	/* write registers and enable system interrupts */
-	outl(cmd_reg, IM_CMD_REG(shpnt));
-	outb(attn_reg, IM_ATTN_REG(shpnt));
-	spin_unlock_irqrestore(shpnt->host_lock, flags);
-}
-
-static void internal_done(Scsi_Cmnd * cmd)
-{
-	cmd->SCp.Status++;
-	return;
-}
-
-/* SCSI-SCB-command for device_inquiry */
-static int device_inquiry(struct Scsi_Host *shpnt, int ldn)
-{
-	int retr;
-	struct im_scb *scb;
-	struct im_tsb *tsb;
-	unsigned char *buf;
-
-	scb = &(ld(shpnt)[ldn].scb);
-	tsb = &(ld(shpnt)[ldn].tsb);
-	buf = (unsigned char *) (&(ld(shpnt)[ldn].buf));
-	ld(shpnt)[ldn].tsb.dev_status = 0;	/* prepare statusblock */
-	for (retr = 0; retr < 3; retr++) {
-		/* fill scb with inquiry command */
-		scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT;
-		scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
-		last_scsi_command(shpnt)[ldn] = IM_DEVICE_INQUIRY_CMD;
-		last_scsi_type(shpnt)[ldn] = IM_SCB;
-		scb->sys_buf_adr = isa_virt_to_bus(buf);
-		scb->sys_buf_length = 255;	/* maximum bufferlength gives max info */
-		scb->tsb_adr = isa_virt_to_bus(tsb);
-		/* issue scb to passed ldn, and busy wait for interrupt */
-		got_interrupt(shpnt) = 0;
-		issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | ldn);
-		while (!got_interrupt(shpnt))
-			barrier();
-
-		/*if command successful, break */
-		if ((stat_result(shpnt) == IM_SCB_CMD_COMPLETED) || (stat_result(shpnt) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
-			return 1;
-	}
-	/*if all three retries failed, return "no device at this ldn" */
-	if (retr >= 3)
-		return 0;
-	else
-		return 1;
-}
-
-static int read_capacity(struct Scsi_Host *shpnt, int ldn)
-{
-	int retr;
-	struct im_scb *scb;
-	struct im_tsb *tsb;
-	unsigned char *buf;
-
-	scb = &(ld(shpnt)[ldn].scb);
-	tsb = &(ld(shpnt)[ldn].tsb);
-	buf = (unsigned char *) (&(ld(shpnt)[ldn].buf));
-	ld(shpnt)[ldn].tsb.dev_status = 0;
-	for (retr = 0; retr < 3; retr++) {
-		/*fill scb with read capacity command */
-		scb->command = IM_READ_CAPACITY_CMD;
-		scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
-		last_scsi_command(shpnt)[ldn] = IM_READ_CAPACITY_CMD;
-		last_scsi_type(shpnt)[ldn] = IM_SCB;
-		scb->sys_buf_adr = isa_virt_to_bus(buf);
-		scb->sys_buf_length = 8;
-		scb->tsb_adr = isa_virt_to_bus(tsb);
-		/*issue scb to passed ldn, and busy wait for interrupt */
-		got_interrupt(shpnt) = 0;
-		issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | ldn);
-		while (!got_interrupt(shpnt))
-			barrier();
-
-		/*if got capacity, get block length and return one device found */
-		if ((stat_result(shpnt) == IM_SCB_CMD_COMPLETED) || (stat_result(shpnt) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
-			return 1;
-	}
-	/*if all three retries failed, return "no device at this ldn" */
-	if (retr >= 3)
-		return 0;
-	else
-		return 1;
-}
-
-static int get_pos_info(struct Scsi_Host *shpnt)
-{
-	int retr;
-	struct im_scb *scb;
-	struct im_tsb *tsb;
-	unsigned char *buf;
-
-	scb = &(ld(shpnt)[MAX_LOG_DEV].scb);
-	tsb = &(ld(shpnt)[MAX_LOG_DEV].tsb);
-	buf = (unsigned char *) (&(ld(shpnt)[MAX_LOG_DEV].buf));
-	ld(shpnt)[MAX_LOG_DEV].tsb.dev_status = 0;
-	for (retr = 0; retr < 3; retr++) {
-		/*fill scb with get_pos_info command */
-		scb->command = IM_GET_POS_INFO_CMD;
-		scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
-		last_scsi_command(shpnt)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD;
-		last_scsi_type(shpnt)[MAX_LOG_DEV] = IM_SCB;
-		scb->sys_buf_adr = isa_virt_to_bus(buf);
-		if (special(shpnt) == IBM_SCSI2_FW)
-			scb->sys_buf_length = 256;	/* get all info from F/W adapter */
-		else
-			scb->sys_buf_length = 18;	/* get exactly 18 bytes for other SCSI */
-		scb->tsb_adr = isa_virt_to_bus(tsb);
-		/*issue scb to ldn=15, and busy wait for interrupt */
-		got_interrupt(shpnt) = 0;
-		issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
-		
-		/* FIXME: timeout */
-		while (!got_interrupt(shpnt))
-			barrier();
-
-		/*if got POS-stuff, get block length and return one device found */
-		if ((stat_result(shpnt) == IM_SCB_CMD_COMPLETED) || (stat_result(shpnt) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
-			return 1;
-	}
-	/* if all three retries failed, return "no device at this ldn" */
-	if (retr >= 3)
-		return 0;
-	else
-		return 1;
-}
-
-/* SCSI-immediate-command for assign. This functions maps/unmaps specific
- ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
- subsystem and for dynamical remapping od ldns. */
-static int immediate_assign(struct Scsi_Host *shpnt, unsigned int pun,
-			    unsigned int lun, unsigned int ldn,
-			    unsigned int operation)
-{
-	int retr;
-	unsigned long imm_cmd;
-
-	for (retr = 0; retr < 3; retr++) {
-		/* select mutation level of the SCSI-adapter */
-		switch (special(shpnt)) {
-		case IBM_SCSI2_FW:
-			imm_cmd = (unsigned long) (IM_ASSIGN_IMM_CMD);
-			imm_cmd |= (unsigned long) ((lun & 7) << 24);
-			imm_cmd |= (unsigned long) ((operation & 1) << 23);
-			imm_cmd |= (unsigned long) ((pun & 7) << 20) | ((pun & 8) << 24);
-			imm_cmd |= (unsigned long) ((ldn & 15) << 16);
-			break;
-		default:
-			imm_cmd = inl(IM_CMD_REG(shpnt));
-			imm_cmd &= (unsigned long) (0xF8000000);	/* keep reserved bits */
-			imm_cmd |= (unsigned long) (IM_ASSIGN_IMM_CMD);
-			imm_cmd |= (unsigned long) ((lun & 7) << 24);
-			imm_cmd |= (unsigned long) ((operation & 1) << 23);
-			imm_cmd |= (unsigned long) ((pun & 7) << 20);
-			imm_cmd |= (unsigned long) ((ldn & 15) << 16);
-			break;
-		}
-		last_scsi_command(shpnt)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD;
-		last_scsi_type(shpnt)[MAX_LOG_DEV] = IM_IMM_CMD;
-		got_interrupt(shpnt) = 0;
-		issue_cmd(shpnt, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
-		while (!got_interrupt(shpnt))
-			barrier();
-
-		/*if command successful, break */
-		if (stat_result(shpnt) == IM_IMMEDIATE_CMD_COMPLETED)
-			return 1;
-	}
-	if (retr >= 3)
-		return 0;
-	else
-		return 1;
-}
-
-static int immediate_feature(struct Scsi_Host *shpnt, unsigned int speed, unsigned int timeout)
-{
-	int retr;
-	unsigned long imm_cmd;
-
-	for (retr = 0; retr < 3; retr++) {
-		/* select mutation level of the SCSI-adapter */
-		imm_cmd = IM_FEATURE_CTR_IMM_CMD;
-		imm_cmd |= (unsigned long) ((speed & 0x7) << 29);
-		imm_cmd |= (unsigned long) ((timeout & 0x1fff) << 16);
-		last_scsi_command(shpnt)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD;
-		last_scsi_type(shpnt)[MAX_LOG_DEV] = IM_IMM_CMD;
-		got_interrupt(shpnt) = 0;
-		/* we need to run into command errors in order to probe for the
-		 * right speed! */
-		global_command_error_excuse = 1;
-		issue_cmd(shpnt, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
-		
-		/* FIXME: timeout */
-		while (!got_interrupt(shpnt))