+++ /dev/null
-/* $Id: $
- * linux/drivers/scsi/wd7000.c
- *
- * Copyright (C) 1992 Thomas Wuensche
- * closely related to the aha1542 driver from Tommy Thorn
- * ( as close as different hardware allows on a lowlevel-driver :-) )
- *
- * Revised (and renamed) by John Boyd <boyd@cis.ohio-state.edu> to
- * accommodate Eric Youngdale's modifications to scsi.c. Nov 1992.
- *
- * Additional changes to support scatter/gather. Dec. 1992. tw/jb
- *
- * No longer tries to reset SCSI bus at boot (it wasn't working anyway).
- * Rewritten to support multiple host adapters.
- * Miscellaneous cleanup.
- * So far, still doesn't do reset or abort correctly, since I have no idea
- * how to do them with this board (8^(. Jan 1994 jb
- *
- * This driver now supports both of the two standard configurations (per
- * the 3.36 Owner's Manual, my latest reference) by the same method as
- * before; namely, by looking for a BIOS signature. Thus, the location of
- * the BIOS signature determines the board configuration. Until I have
- * time to do something more flexible, users should stick to one of the
- * following:
- *
- * Standard configuration for single-adapter systems:
- * - BIOS at CE00h
- * - I/O base address 350h
- * - IRQ level 15
- * - DMA channel 6
- * Standard configuration for a second adapter in a system:
- * - BIOS at C800h
- * - I/O base address 330h
- * - IRQ level 11
- * - DMA channel 5
- *
- * Anyone who can recompile the kernel is welcome to add others as need
- * arises, but unpredictable results may occur if there are conflicts.
- * In any event, if there are multiple adapters in a system, they MUST
- * use different I/O bases, IRQ levels, and DMA channels, since they will be
- * indistinguishable (and in direct conflict) otherwise.
- *
- * As a point of information, the NO_OP command toggles the CMD_RDY bit
- * of the status port, and this fact could be used as a test for the I/O
- * base address (or more generally, board detection). There is an interrupt
- * status port, so IRQ probing could also be done. I suppose the full
- * DMA diagnostic could be used to detect the DMA channel being used. I
- * haven't done any of this, though, because I think there's too much of
- * a chance that such explorations could be destructive, if some other
- * board's resources are used inadvertently. So, call me a wimp, but I
- * don't want to try it. The only kind of exploration I trust is memory
- * exploration, since it's more certain that reading memory won't be
- * destructive.
- *
- * More to my liking would be a LILO boot command line specification, such
- * as is used by the aha152x driver (and possibly others). I'll look into
- * it, as I have time...
- *
- * I get mail occasionally from people who either are using or are
- * considering using a WD7000 with Linux. There is a variety of
- * nomenclature describing WD7000's. To the best of my knowledge, the
- * following is a brief summary (from an old WD doc - I don't work for
- * them or anything like that):
- *
- * WD7000-FASST2: This is a WD7000 board with the real-mode SST ROM BIOS
- * installed. Last I heard, the BIOS was actually done by Columbia
- * Data Products. The BIOS is only used by this driver (and thus
- * by Linux) to identify the board; none of it can be executed under
- * Linux.
- *
- * WD7000-ASC: This is the original adapter board, with or without BIOS.
- * The board uses a WD33C93 or WD33C93A SBIC, which in turn is
- * controlled by an onboard Z80 processor. The board interface
- * visible to the host CPU is defined effectively by the Z80's
- * firmware, and it is this firmware's revision level that is
- * determined and reported by this driver. (The version of the
- * on-board BIOS is of no interest whatsoever.) The host CPU has
- * no access to the SBIC; hence the fact that it is a WD33C93 is
- * also of no interest to this driver.
- *
- * WD7000-AX:
- * WD7000-MX:
- * WD7000-EX: These are newer versions of the WD7000-ASC. The -ASC is
- * largely built from discrete components; these boards use more
- * integration. The -AX is an ISA bus board (like the -ASC),
- * the -MX is an MCA (i.e., PS/2) bus board), and the -EX is an
- * EISA bus board.
- *
- * At the time of my documentation, the -?X boards were "future" products,
- * and were not yet available. However, I vaguely recall that Thomas
- * Wuensche had an -AX, so I believe at least it is supported by this
- * driver. I have no personal knowledge of either -MX or -EX boards.
- *
- * P.S. Just recently, I've discovered (directly from WD and Future
- * Domain) that all but the WD7000-EX have been out of production for
- * two years now. FD has production rights to the 7000-EX, and are
- * producing it under a new name, and with a new BIOS. If anyone has
- * one of the FD boards, it would be nice to come up with a signature
- * for it.
- * J.B. Jan 1994.
- *
- *
- * Revisions by Miroslav Zagorac <zaga@fly.cc.fer.hr>
- *
- * 08/24/1996.
- *
- * Enhancement for wd7000_detect function has been made, so you don't have
- * to enter BIOS ROM address in initialisation data (see struct Config).
- * We cannot detect IRQ, DMA and I/O base address for now, so we have to
- * enter them as arguments while wd_7000 is detected. If someone has IRQ,
- * DMA or I/O base address set to some other value, he can enter them in
- * configuration without any problem. Also I wrote a function wd7000_setup,
- * so now you can enter WD-7000 definition as kernel arguments,
- * as in lilo.conf:
- *
- * append="wd7000=IRQ,DMA,IO"
- *
- * PS: If card BIOS ROM is disabled, function wd7000_detect now will recognize
- * adapter, unlike the old one. Anyway, BIOS ROM from WD7000 adapter is
- * useless for Linux. B^)
- *
- *
- * 09/06/1996.
- *
- * Autodetecting of I/O base address from wd7000_detect function is removed,
- * some little bugs removed, etc...
- *
- * Thanks to Roger Scott for driver debugging.
- *
- * 06/07/1997
- *
- * Added support for /proc file system (/proc/scsi/wd7000/[0...] files).
- * Now, driver can handle hard disks with capacity >1GB.
- *
- * 01/15/1998
- *
- * Added support for BUS_ON and BUS_OFF parameters in config line.
- * Miscellaneous cleanup.
- *
- * 03/01/1998
- *
- * WD7000 driver now work on kernels >= 2.1.x
- *
- *
- * 12/31/2001 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- *
- * use host->host_lock, not io_request_lock, cleanups
- *
- * 2002/10/04 - Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- * Use dev_id for interrupts, kill __func__ pasting
- * Add a lock for the scb pool, clean up all other cli/sti usage stuff
- * Use the adapter lock for the other places we had the cli's
- *
- * 2002/10/06 - Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- * Switch to new style error handling
- * Clean up delay to udelay, and yielding sleeps
- * Make host reset actually reset the card
- * Make everything static
- *
- * 2003/02/12 - Christoph Hellwig <hch@infradead.org>
- *
- * Cleaned up host template definition
- * Removed now obsolete wd7000.h
- */
-
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/spinlock.h>
-#include <linux/ioport.h>
-#include <linux/proc_fs.h>
-#include <linux/blkdev.h>
-#include <linux/init.h>
-#include <linux/stat.h>
-#include <linux/io.h>
-
-#include <asm/dma.h>
-
-#include <scsi/scsi.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsicam.h>
-
-
-#undef WD7000_DEBUG /* general debug */
-#ifdef WD7000_DEBUG
-#define dprintk printk
-#else
-#define dprintk no_printk
-#endif
-
-/*
- * Mailbox structure sizes.
- * I prefer to keep the number of ICMBs much larger than the number of
- * OGMBs. OGMBs are used very quickly by the driver to start one or
- * more commands, while ICMBs are used by the host adapter per command.
- */
-#define OGMB_CNT 16
-#define ICMB_CNT 32
-
-/*
- * Scb's are shared by all active adapters. So, if they all become busy,
- * callers may be made to wait in alloc_scbs for them to free. That can
- * be avoided by setting MAX_SCBS to NUM_CONFIG * WD7000_Q. If you'd
- * rather conserve memory, use a smaller number (> 0, of course) - things
- * will should still work OK.
- */
-#define MAX_SCBS 32
-
-/*
- * In this version, sg_tablesize now defaults to WD7000_SG, and will
- * be set to SG_NONE for older boards. This is the reverse of the
- * previous default, and was changed so that the driver-level
- * scsi_host_template would reflect the driver's support for scatter/
- * gather.
- *
- * Also, it has been reported that boards at Revision 6 support scatter/
- * gather, so the new definition of an "older" board has been changed
- * accordingly.
- */
-#define WD7000_Q 16
-#define WD7000_SG 16
-
-
-/*
- * WD7000-specific mailbox structure
- *
- */
-typedef volatile struct mailbox {
- unchar status;
- unchar scbptr[3]; /* SCSI-style - MSB first (big endian) */
-} Mailbox;
-
-/*
- * This structure should contain all per-adapter global data. I.e., any
- * new global per-adapter data should put in here.
- */
-typedef struct adapter {
- struct Scsi_Host *sh; /* Pointer to Scsi_Host structure */
- int iobase; /* This adapter's I/O base address */
- int irq; /* This adapter's IRQ level */
- int dma; /* This adapter's DMA channel */
- int int_counter; /* This adapter's interrupt counter */
- int bus_on; /* This adapter's BUS_ON time */
- int bus_off; /* This adapter's BUS_OFF time */
- struct { /* This adapter's mailboxes */
- Mailbox ogmb[OGMB_CNT]; /* Outgoing mailboxes */
- Mailbox icmb[ICMB_CNT]; /* Incoming mailboxes */
- } mb;
- int next_ogmb; /* to reduce contention at mailboxes */
- unchar control; /* shadows CONTROL port value */
- unchar rev1, rev2; /* filled in by wd7000_revision */
-} Adapter;
-
-/*
- * (linear) base address for ROM BIOS
- */
-static const long wd7000_biosaddr[] = {
- 0xc0000, 0xc2000, 0xc4000, 0xc6000, 0xc8000, 0xca000, 0xcc000, 0xce000,
- 0xd0000, 0xd2000, 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0xde000
-};
-#define NUM_ADDRS ARRAY_SIZE(wd7000_biosaddr)
-
-static const unsigned short wd7000_iobase[] = {
- 0x0300, 0x0308, 0x0310, 0x0318, 0x0320, 0x0328, 0x0330, 0x0338,
- 0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370, 0x0378,
- 0x0380, 0x0388, 0x0390, 0x0398, 0x03a0, 0x03a8, 0x03b0, 0x03b8,
- 0x03c0, 0x03c8, 0x03d0, 0x03d8, 0x03e0, 0x03e8, 0x03f0, 0x03f8
-};
-#define NUM_IOPORTS ARRAY_SIZE(wd7000_iobase)
-
-static const short wd7000_irq[] = { 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 };
-#define NUM_IRQS ARRAY_SIZE(wd7000_irq)
-
-static const short wd7000_dma[] = { 5, 6, 7 };
-#define NUM_DMAS ARRAY_SIZE(wd7000_dma)
-
-/*
- * The following is set up by wd7000_detect, and used thereafter for
- * proc and other global ookups
- */
-
-#define UNITS 8
-static struct Scsi_Host *wd7000_host[UNITS];
-
-#define BUS_ON 64 /* x 125ns = 8000ns (BIOS default) */
-#define BUS_OFF 15 /* x 125ns = 1875ns (BIOS default) */
-
-/*
- * Standard Adapter Configurations - used by wd7000_detect
- */
-typedef struct {
- short irq; /* IRQ level */
- short dma; /* DMA channel */
- unsigned iobase; /* I/O base address */
- short bus_on; /* Time that WD7000 spends on the AT-bus when */
- /* transferring data. BIOS default is 8000ns. */
- short bus_off; /* Time that WD7000 spends OFF THE BUS after */
- /* while it is transferring data. */
- /* BIOS default is 1875ns */
-} Config;
-
-/*
- * Add here your configuration...
- */
-static Config configs[] = {
- {15, 6, 0x350, BUS_ON, BUS_OFF}, /* defaults for single adapter */
- {11, 5, 0x320, BUS_ON, BUS_OFF}, /* defaults for second adapter */
- {7, 6, 0x350, BUS_ON, BUS_OFF}, /* My configuration (Zaga) */
- {-1, -1, 0x0, BUS_ON, BUS_OFF} /* Empty slot */
-};
-#define NUM_CONFIGS ARRAY_SIZE(configs)
-
-/*
- * The following list defines strings to look for in the BIOS that identify
- * it as the WD7000-FASST2 SST BIOS. I suspect that something should be
- * added for the Future Domain version.
- */
-typedef struct signature {
- const char *sig; /* String to look for */
- unsigned long ofs; /* offset from BIOS base address */
- unsigned len; /* length of string */
-} Signature;
-
-static const Signature signatures[] = {
- {"SSTBIOS", 0x0000d, 7} /* "SSTBIOS" @ offset 0x0000d */
-};
-#define NUM_SIGNATURES ARRAY_SIZE(signatures)
-
-
-/*
- * I/O Port Offsets and Bit Definitions
- * 4 addresses are used. Those not defined here are reserved.
- */
-#define ASC_STAT 0 /* Status, Read */
-#define ASC_COMMAND 0 /* Command, Write */
-#define ASC_INTR_STAT 1 /* Interrupt Status, Read */
-#define ASC_INTR_ACK 1 /* Acknowledge, Write */
-#define ASC_CONTROL 2 /* Control, Write */
-
-/*
- * ASC Status Port
- */
-#define INT_IM 0x80 /* Interrupt Image Flag */
-#define CMD_RDY 0x40 /* Command Port Ready */
-#define CMD_REJ 0x20 /* Command Port Byte Rejected */
-#define ASC_INIT 0x10 /* ASC Initialized Flag */
-#define ASC_STATMASK 0xf0 /* The lower 4 Bytes are reserved */
-
-/*
- * COMMAND opcodes
- *
- * Unfortunately, I have no idea how to properly use some of these commands,
- * as the OEM manual does not make it clear. I have not been able to use
- * enable/disable unsolicited interrupts or the reset commands with any
- * discernible effect whatsoever. I think they may be related to certain
- * ICB commands, but again, the OEM manual doesn't make that clear.
- */
-#define NO_OP 0 /* NO-OP toggles CMD_RDY bit in ASC_STAT */
-#define INITIALIZATION 1 /* initialization (10 bytes) */
-#define DISABLE_UNS_INTR 2 /* disable unsolicited interrupts */
-#define ENABLE_UNS_INTR 3 /* enable unsolicited interrupts */
-#define INTR_ON_FREE_OGMB 4 /* interrupt on free OGMB */
-#define SOFT_RESET 5 /* SCSI bus soft reset */
-#define HARD_RESET_ACK 6 /* SCSI bus hard reset acknowledge */
-#define START_OGMB 0x80 /* start command in OGMB (n) */
-#define SCAN_OGMBS 0xc0 /* start multiple commands, signature (n) */
- /* where (n) = lower 6 bits */
-/*
- * For INITIALIZATION:
- */
-typedef struct initCmd {
- unchar op; /* command opcode (= 1) */
- unchar ID; /* Adapter's SCSI ID */
- unchar bus_on; /* Bus on time, x 125ns (see below) */
- unchar bus_off; /* Bus off time, "" "" */
- unchar rsvd; /* Reserved */
- unchar mailboxes[3]; /* Address of Mailboxes, MSB first */
- unchar ogmbs; /* Number of outgoing MBs, max 64, 0,1 = 1 */
- unchar icmbs; /* Number of incoming MBs, "" "" */
-} InitCmd;
-
-/*
- * Interrupt Status Port - also returns diagnostic codes at ASC reset
- *
- * if msb is zero, the lower bits are diagnostic status
- * Diagnostics:
- * 01 No diagnostic error occurred
- * 02 RAM failure
- * 03 FIFO R/W failed
- * 04 SBIC register read/write failed
- * 05 Initialization D-FF failed
- * 06 Host IRQ D-FF failed
- * 07 ROM checksum error
- * Interrupt status (bitwise):
- * 10NNNNNN outgoing mailbox NNNNNN is free
- * 11NNNNNN incoming mailbox NNNNNN needs service
- */
-#define MB_INTR 0xC0 /* Mailbox Service possible/required */
-#define IMB_INTR 0x40 /* 1 Incoming / 0 Outgoing */
-#define MB_MASK 0x3f /* mask for mailbox number */
-
-/*
- * CONTROL port bits
- */
-#define INT_EN 0x08 /* Interrupt Enable */
-#define DMA_EN 0x04 /* DMA Enable */
-#define SCSI_RES 0x02 /* SCSI Reset */
-#define ASC_RES 0x01 /* ASC Reset */
-
-/*
- * Driver data structures:
- * - mb and scbs are required for interfacing with the host adapter.
- * An SCB has extra fields not visible to the adapter; mb's
- * _cannot_ do this, since the adapter assumes they are contiguous in
- * memory, 4 bytes each, with ICMBs following OGMBs, and uses this fact
- * to access them.
- * - An icb is for host-only (non-SCSI) commands. ICBs are 16 bytes each;
- * the additional bytes are used only by the driver.
- * - For now, a pool of SCBs are kept in global storage by this driver,
- * and are allocated and freed as needed.
- *
- * The 7000-FASST2 marks OGMBs empty as soon as it has _started_ a command,
- * not when it has finished. Since the SCB must be around for completion,
- * problems arise when SCBs correspond to OGMBs, which may be reallocated
- * earlier (or delayed unnecessarily until a command completes).
- * Mailboxes are used as transient data structures, simply for
- * carrying SCB addresses to/from the 7000-FASST2.
- *
- * Note also since SCBs are not "permanently" associated with mailboxes,
- * there is no need to keep a global list of scsi_cmnd pointers indexed
- * by OGMB. Again, SCBs reference their scsi_cmnds directly, so mailbox
- * indices need not be involved.
- */
-
-/*
- * WD7000-specific scatter/gather element structure
- */
-typedef struct sgb {
- unchar len[3];
- unchar ptr[3]; /* Also SCSI-style - MSB first */
-} Sgb;
-
-typedef struct scb { /* Command Control Block 5.4.1 */
- unchar op; /* Command Control Block Operation Code */
- unchar idlun; /* op=0,2:Target Id, op=1:Initiator Id */
- /* Outbound data transfer, length is checked */
- /* Inbound data transfer, length is checked */
- /* Logical Unit Number */
- unchar cdb[12]; /* SCSI Command Block */
- volatile unchar status; /* SCSI Return Status */
- volatile unchar vue; /* Vendor Unique Error Code */
- unchar maxlen[3]; /* Maximum Data Transfer Length */
- unchar dataptr[3]; /* SCSI Data Block Pointer */
- unchar linkptr[3]; /* Next Command Link Pointer */
- unchar direc; /* Transfer Direction */
- unchar reserved2[6]; /* SCSI Command Descriptor Block */
- /* end of hardware SCB */
- struct scsi_cmnd *SCpnt;/* scsi_cmnd using this SCB */
- Sgb sgb[WD7000_SG]; /* Scatter/gather list for this SCB */
- Adapter *host; /* host adapter */
- struct scb *next; /* for lists of scbs */
-} Scb;
-
-/*
- * This driver is written to allow host-only commands to be executed.
- * These use a 16-byte block called an ICB. The format is extended by the
- * driver to 18 bytes, to support the status returned in the ICMB and
- * an execution phase code.
- *
- * There are other formats besides these; these are the ones I've tried
- * to use. Formats for some of the defined ICB opcodes are not defined
- * (notably, get/set unsolicited interrupt status) in my copy of the OEM
- * manual, and others are ambiguous/hard to follow.
- */
-#define ICB_OP_MASK 0x80 /* distinguishes scbs from icbs */
-#define ICB_OP_OPEN_RBUF 0x80 /* open receive buffer */
-#define ICB_OP_RECV_CMD 0x81 /* receive command from initiator */
-#define ICB_OP_RECV_DATA 0x82 /* receive data from initiator */
-#define ICB_OP_RECV_SDATA 0x83 /* receive data with status from init. */
-#define ICB_OP_SEND_DATA 0x84 /* send data with status to initiator */
-#define ICB_OP_SEND_STAT 0x86 /* send command status to initiator */
- /* 0x87 is reserved */
-#define ICB_OP_READ_INIT 0x88 /* read initialization bytes */
-#define ICB_OP_READ_ID 0x89 /* read adapter's SCSI ID */
-#define ICB_OP_SET_UMASK 0x8A /* set unsolicited interrupt mask */
-#define ICB_OP_GET_UMASK 0x8B /* read unsolicited interrupt mask */
-#define ICB_OP_GET_REVISION 0x8C /* read firmware revision level */
-#define ICB_OP_DIAGNOSTICS 0x8D /* execute diagnostics */
-#define ICB_OP_SET_EPARMS 0x8E /* set execution parameters */
-#define ICB_OP_GET_EPARMS 0x8F /* read execution parameters */
-
-typedef struct icbRecvCmd {
- unchar op;
- unchar IDlun; /* Initiator SCSI ID/lun */
- unchar len[3]; /* command buffer length */
- unchar ptr[3]; /* command buffer address */
- unchar rsvd[7]; /* reserved */
- volatile unchar vue; /* vendor-unique error code */
- volatile unchar status; /* returned (icmb) status */
- volatile unchar phase; /* used by interrupt handler */
-} IcbRecvCmd;
-
-typedef struct icbSendStat {
- unchar op;
- unchar IDlun; /* Target SCSI ID/lun */
- unchar stat; /* (outgoing) completion status byte 1 */
- unchar rsvd[12]; /* reserved */
- volatile unchar vue; /* vendor-unique error code */
- volatile unchar status; /* returned (icmb) status */
- volatile unchar phase; /* used by interrupt handler */
-} IcbSendStat;
-
-typedef struct icbRevLvl {
- unchar op;
- volatile unchar primary; /* primary revision level (returned) */
- volatile unchar secondary; /* secondary revision level (returned) */
- unchar rsvd[12]; /* reserved */
- volatile unchar vue; /* vendor-unique error code */
- volatile unchar status; /* returned (icmb) status */
- volatile unchar phase; /* used by interrupt handler */
-} IcbRevLvl;
-
-typedef struct icbUnsMask { /* I'm totally guessing here */
- unchar op;
- volatile unchar mask[14]; /* mask bits */
-#if 0
- unchar rsvd[12]; /* reserved */
-#endif
- volatile unchar vue; /* vendor-unique error code */
- volatile unchar status; /* returned (icmb) status */
- volatile unchar phase; /* used by interrupt handler */
-} IcbUnsMask;
-
-typedef struct icbDiag {
- unchar op;
- unchar type; /* diagnostics type code (0-3) */
- unchar len[3]; /* buffer length */
- unchar ptr[3]; /* buffer address */
- unchar rsvd[7]; /* reserved */
- volatile unchar vue; /* vendor-unique error code */
- volatile unchar status; /* returned (icmb) status */
- volatile unchar phase; /* used by interrupt handler */
-} IcbDiag;
-
-#define ICB_DIAG_POWERUP 0 /* Power-up diags only */
-#define ICB_DIAG_WALKING 1 /* walking 1's pattern */
-#define ICB_DIAG_DMA 2 /* DMA - system memory diags */
-#define ICB_DIAG_FULL 3 /* do both 1 & 2 */
-
-typedef struct icbParms {
- unchar op;
- unchar rsvd1; /* reserved */
- unchar len[3]; /* parms buffer length */
- unchar ptr[3]; /* parms buffer address */
- unchar idx[2]; /* index (MSB-LSB) */
- unchar rsvd2[5]; /* reserved */
- volatile unchar vue; /* vendor-unique error code */
- volatile unchar status; /* returned (icmb) status */
- volatile unchar phase; /* used by interrupt handler */
-} IcbParms;
-
-typedef struct icbAny {
- unchar op;
- unchar data[14]; /* format-specific data */
- volatile unchar vue; /* vendor-unique error code */
- volatile unchar status; /* returned (icmb) status */
- volatile unchar phase; /* used by interrupt handler */
-} IcbAny;
-
-typedef union icb {
- unchar op; /* ICB opcode */
- IcbRecvCmd recv_cmd; /* format for receive command */
- IcbSendStat send_stat; /* format for send status */
- IcbRevLvl rev_lvl; /* format for get revision level */
- IcbDiag diag; /* format for execute diagnostics */
- IcbParms eparms; /* format for get/set exec parms */
- IcbAny icb; /* generic format */
- unchar data[18];
-} Icb;
-
-#ifdef MODULE
-static char *wd7000;
-module_param(wd7000, charp, 0);
-#endif
-
-/*
- * Driver SCB structure pool.
- *
- * The SCBs declared here are shared by all host adapters; hence, this
- * structure is not part of the Adapter structure.
- */
-static Scb scbs[MAX_SCBS];
-static Scb *scbfree; /* free list */
-static int freescbs = MAX_SCBS; /* free list counter */
-static spinlock_t scbpool_lock; /* guards the scb free list and count */
-
-/*
- * END of data/declarations - code follows.
- */
-static void __init setup_error(char *mesg, int *ints)
-{
- if (ints[0] == 3)
- printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x\" -> %s\n", ints[1], ints[2], ints[3], mesg);
- else if (ints[0] == 4)
- printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], mesg);
- else
- printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], ints[5], mesg);
-}
-
-
-/*
- * Note: You can now set these options from the kernel's "command line".
- * The syntax is:
- *
- * wd7000=<IRQ>,<DMA>,<IO>[,<BUS_ON>[,<BUS_OFF>]]
- *
- * , where BUS_ON and BUS_OFF are in nanoseconds. BIOS default values
- * are 8000ns for BUS_ON and 1875ns for BUS_OFF.
- * eg:
- * wd7000=7,6,0x350
- *
- * will configure the driver for a WD-7000 controller
- * using IRQ 15 with a DMA channel 6, at IO base address 0x350.
- */
-static int __init wd7000_setup(char *str)
-{
- static short wd7000_card_num; /* .bss will zero this */
- short i;
- int ints[6];
-
- (void) get_options(str, ARRAY_SIZE(ints), ints);
-
- if (wd7000_card_num >= NUM_CONFIGS) {
- printk(KERN_ERR "%s: Too many \"wd7000=\" configurations in " "command line!\n", __func__);
- return 0;
- }
-
- if ((ints[0] < 3) || (ints[0] > 5)) {
- printk(KERN_ERR "%s: Error in command line! " "Usage: wd7000=<IRQ>,<DMA>,IO>[,<BUS_ON>" "[,<BUS_OFF>]]\n", __func__);
- } else {
- for (i = 0; i < NUM_IRQS; i++)
- if (ints[1] == wd7000_irq[i])
- break;
-
- if (i == NUM_IRQS) {
- setup_error("invalid IRQ.", ints);
- return 0;
- } else
- configs[wd7000_card_num].irq = ints[1];
-
- for (i = 0; i < NUM_DMAS; i++)
- if (ints[2] == wd7000_dma[i])
- break;
-
- if (i == NUM_DMAS) {
- setup_error("invalid DMA channel.", ints);
- return 0;
- } else
- configs[wd7000_card_num].dma = ints[2];
-
- for (i = 0; i < NUM_IOPORTS; i++)
- if (ints[3] == wd7000_iobase[i])
- break;
-
- if (i == NUM_IOPORTS) {
- setup_error("invalid I/O base address.", ints);
- return 0;
- } else
- configs[wd7000_card_num].iobase = ints[3];
-
- if (ints[0] > 3) {
- if ((ints[4] < 500) || (ints[4] > 31875)) {
- setup_error("BUS_ON value is out of range (500" " to 31875 nanoseconds)!", ints);
- configs[wd7000_card_num].bus_on = BUS_ON;
- } else
- configs[wd7000_card_num].bus_on = ints[4] / 125;
- } else
- configs[wd7000_card_num].bus_on = BUS_ON;
-
- if (ints[0] > 4) {
- if ((ints[5] < 500) || (ints[5] > 31875)) {
- setup_error("BUS_OFF value is out of range (500" " to 31875 nanoseconds)!", ints);
- configs[wd7000_card_num].bus_off = BUS_OFF;
- } else
- configs[wd7000_card_num].bus_off = ints[5] / 125;
- } else
- configs[wd7000_card_num].bus_off = BUS_OFF;
-
- if (wd7000_card_num) {
- for (i = 0; i < (wd7000_card_num - 1); i++) {
- int j = i + 1;
-
- for (; j < wd7000_card_num; j++)
- if (configs[i].irq == configs[j].irq) {
- setup_error("duplicated IRQ!", ints);
- return 0;
- }
- if (configs[i].dma == configs[j].dma) {
- setup_error("duplicated DMA " "channel!", ints);
- return 0;
- }
- if (configs[i].iobase == configs[j].iobase) {
- setup_error("duplicated I/O " "base address!", ints);
- return 0;
- }
- }
- }
-
- dprintk(KERN_DEBUG "wd7000_setup: IRQ=%d, DMA=%d, I/O=0x%x, "
- "BUS_ON=%dns, BUS_OFF=%dns\n", configs[wd7000_card_num].irq, configs[wd7000_card_num].dma, configs[wd7000_card_num].iobase, configs[wd7000_card_num].bus_on * 125, configs[wd7000_card_num].bus_off * 125);
-
- wd7000_card_num++;
- }
- return 1;
-}
-
-__setup("wd7000=", wd7000_setup);
-
-static inline void any2scsi(unchar * scsi, int any)
-{
- *scsi++ = (unsigned)any >> 16;
- *scsi++ = (unsigned)any >> 8;
- *scsi++ = any;
-}
-
-static inline int scsi2int(unchar * scsi)
-{
- return (scsi[0] << 16) | (scsi[1] << 8) | scsi[2];
-}
-
-static inline void wd7000_enable_intr(Adapter * host)
-{
- host->control |= INT_EN;
- outb(host->control, host->iobase + ASC_CONTROL);
-}
-
-
-static inline void wd7000_enable_dma(Adapter * host)
-{
- unsigned long flags;
- host->control |= DMA_EN;
- outb(host->control, host->iobase + ASC_CONTROL);
-
- flags = claim_dma_lock();
- set_dma_mode(host->dma, DMA_MODE_CASCADE);
- enable_dma(host->dma);
- release_dma_lock(flags);
-
-}
-
-
-#define WAITnexttimeout 200 /* 2 seconds */
-
-static inline short WAIT(unsigned port, unsigned mask, unsigned allof, unsigned noneof)
-{
- unsigned WAITbits;
- unsigned long WAITtimeout = jiffies + WAITnexttimeout;
-
- while (time_before_eq(jiffies, WAITtimeout)) {
- WAITbits = inb(port) & mask;
-
- if (((WAITbits & allof) == allof) && ((WAITbits & noneof) == 0))
- return (0);
- }
-
- return (1);
-}
-
-
-static inline int command_out(Adapter * host, unchar * cmd, int len)
-{
- if (!WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
- while (len--) {
- do {
- outb(*cmd, host->iobase + ASC_COMMAND);
- WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0);
- } while (inb(host->iobase + ASC_STAT) & CMD_REJ);
-
- cmd++;
- }
-
- return (1);
- }
-
- printk(KERN_WARNING "wd7000 command_out: WAIT failed(%d)\n", len + 1);
-
- return (0);
-}
-
-
-/*
- * This version of alloc_scbs is in preparation for supporting multiple
- * commands per lun and command chaining, by queueing pending commands.
- * We will need to allocate Scbs in blocks since they will wait to be
- * executed so there is the possibility of deadlock otherwise.
- * Also, to keep larger requests from being starved by smaller requests,
- * we limit access to this routine with an internal busy flag, so that
- * the satisfiability of a request is not dependent on the size of the
- * request.
- */
-static inline Scb *alloc_scbs(struct Scsi_Host *host, int needed)
-{
- Scb *scb, *p = NULL;
- unsigned long flags;
- unsigned long timeout = jiffies + WAITnexttimeout;
- unsigned long now;
- int i;
-
- if (needed <= 0)
- return (NULL); /* sanity check */
-
- spin_unlock_irq(host->host_lock);
-
- retry:
- while (freescbs < needed) {
- timeout = jiffies + WAITnexttimeout;
- do {
- /* FIXME: can we actually just yield here ?? */
- for (now = jiffies; now == jiffies;)
- cpu_relax(); /* wait a jiffy */
- } while (freescbs < needed && time_before_eq(jiffies, timeout));
- /*
- * If we get here with enough free Scbs, we can take them.
- * Otherwise, we timed out and didn't get enough.
- */
- if (freescbs < needed) {
- printk(KERN_ERR "wd7000: can't get enough free SCBs.\n");
- return (NULL);
- }
- }
-
- /* Take the lock, then check we didn't get beaten, if so try again */
- spin_lock_irqsave(&scbpool_lock, flags);
- if (freescbs < needed) {
- spin_unlock_irqrestore(&scbpool_lock, flags);
- goto retry;
- }
-
- scb = scbfree;
- freescbs -= needed;
- for (i = 0; i < needed; i++) {
- p = scbfree;
- scbfree = p->next;
- }
- p->next = NULL;
-
- spin_unlock_irqrestore(&scbpool_lock, flags);
-
- spin_lock_irq(host->host_lock);
- return (scb);
-}
-
-
-static inline void free_scb(Scb * scb)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&scbpool_lock, flags);
-
- memset(scb, 0, sizeof(Scb));
- scb->next = scbfree;
- scbfree = scb;
- freescbs++;
-
- spin_unlock_irqrestore(&scbpool_lock, flags);
-}
-
-
-static inline void init_scbs(void)
-{
- int i;
-
- spin_lock_init(&scbpool_lock);
-
- /* This is only ever called before the SCB pool is active */
-
- scbfree = &(scbs[0]);
- memset(scbs, 0, sizeof(scbs));
- for (i = 0; i < MAX_SCBS - 1; i++) {
- scbs[i].next = &(scbs[i + 1]);
- scbs[i].SCpnt = NULL;
- }
- scbs[MAX_SCBS - 1].next = NULL;
- scbs[MAX_SCBS - 1].SCpnt = NULL;
-}
-
-
-static int mail_out(Adapter * host, Scb * scbptr)
-/*
- * Note: this can also be used for ICBs; just cast to the parm type.
- */
-{
- int i, ogmb;
- unsigned long flags;
- unchar start_ogmb;
- Mailbox *ogmbs = host->mb.ogmb;
- int *next_ogmb = &(host->next_ogmb);
-
- dprintk("wd7000_mail_out: 0x%06lx", (long) scbptr);
-
- /* We first look for a free outgoing mailbox */
- spin_lock_irqsave(host->sh->host_lock, flags);
- ogmb = *next_ogmb;
- for (i = 0; i < OGMB_CNT; i++) {
- if (ogmbs[ogmb].status == 0) {
- dprintk(" using OGMB 0x%x", ogmb);
- ogmbs[ogmb].status = 1;
- any2scsi((unchar *) ogmbs[ogmb].scbptr, (int) scbptr);
-
- *next_ogmb = (ogmb + 1) % OGMB_CNT;
- break;
- } else
- ogmb = (ogmb + 1) % OGMB_CNT;
- }
- spin_unlock_irqrestore(host->sh->host_lock, flags);
-
- dprintk(", scb is 0x%06lx", (long) scbptr);
-
- if (i >= OGMB_CNT) {
- /*
- * Alternatively, we might issue the "interrupt on free OGMB",
- * and sleep, but it must be ensured that it isn't the init
- * task running. Instead, this version assumes that the caller
- * will be persistent, and try again. Since it's the adapter
- * that marks OGMB's free, waiting even with interrupts off
- * should work, since they are freed very quickly in most cases.
- */
- dprintk(", no free OGMBs.\n");
- return (0);
- }
-
- wd7000_enable_intr(host);
-
- start_ogmb = START_OGMB | ogmb;
- command_out(host, &start_ogmb, 1);
-
- dprintk(", awaiting interrupt.\n");
-
- return (1);
-}
-
-
-static int make_code(unsigned hosterr, unsigned scsierr)
-{
-#ifdef WD7000_DEBUG
- int in_error = hosterr;
-#endif
-
- switch ((hosterr >> 8) & 0xff) {
- case 0: /* Reserved */
- hosterr = DID_ERROR;
- break;
- case 1: /* Command Complete, no errors */
- hosterr = DID_OK;
- break;
- case 2: /* Command complete, error logged in scb status (scsierr) */
- hosterr = DID_OK;
- break;
- case 4: /* Command failed to complete - timeout */
- hosterr = DID_TIME_OUT;
- break;
- case 5: /* Command terminated; Bus reset by external device */
- hosterr = DID_RESET;
- break;
- case 6: /* Unexpected Command Received w/ host as target */
- hosterr = DID_BAD_TARGET;
- break;
- case 80: /* Unexpected Reselection */
- case 81: /* Unexpected Selection */
- hosterr = DID_BAD_INTR;
- break;
- case 82: /* Abort Command Message */
- hosterr = DID_ABORT;
- break;
- case 83: /* SCSI Bus Software Reset */
- case 84: /* SCSI Bus Hardware Reset */
- hosterr = DID_RESET;
- break;
- default: /* Reserved */
- hosterr = DID_ERROR;
- }
-#ifdef WD7000_DEBUG
- if (scsierr || hosterr)
- dprintk("\nSCSI command error: SCSI 0x%02x host 0x%04x return %d\n", scsierr, in_error, hosterr);
-#endif
- return (scsierr | (hosterr << 16));
-}
-
-#define wd7000_intr_ack(host) outb (0, host->iobase + ASC_INTR_ACK)
-
-
-static irqreturn_t wd7000_intr(int irq, void *dev_id)
-{
- Adapter *host = (Adapter *) dev_id;
- int flag, icmb, errstatus, icmb_status;
- int host_error, scsi_error;
- Scb *scb; /* for SCSI commands */
- IcbAny *icb; /* for host commands */
- struct scsi_cmnd *SCpnt;
- Mailbox *icmbs = host->mb.icmb;
- unsigned long flags;
-
- spin_lock_irqsave(host->sh->host_lock, flags);
- host->int_counter++;
-
- dprintk("wd7000_intr: irq = %d, host = 0x%06lx\n", irq, (long) host);
-
- flag = inb(host->iobase + ASC_INTR_STAT);
-
- dprintk("wd7000_intr: intr stat = 0x%02x\n", flag);
-
- if (!(inb(host->iobase + ASC_STAT) & INT_IM)) {
- /* NB: these are _very_ possible if IRQ 15 is being used, since
- * it's the "garbage collector" on the 2nd 8259 PIC. Specifically,
- * any interrupt signal into the 8259 which can't be identified
- * comes out as 7 from the 8259, which is 15 to the host. Thus, it
- * is a good thing the WD7000 has an interrupt status port, so we
- * can sort these out. Otherwise, electrical noise and other such
- * problems would be indistinguishable from valid interrupts...
- */
- dprintk("wd7000_intr: phantom interrupt...\n");
- goto ack;
- }
-
- if (!(flag & MB_INTR))
- goto ack;
-
- /* The interrupt is for a mailbox */
- if (!(flag & IMB_INTR)) {
- dprintk("wd7000_intr: free outgoing mailbox\n");
- /*
- * If sleep_on() and the "interrupt on free OGMB" command are
- * used in mail_out(), wake_up() should correspondingly be called
- * here. For now, we don't need to do anything special.
- */
- goto ack;
- }
-
- /* The interrupt is for an incoming mailbox */
- icmb = flag & MB_MASK;
- icmb_status = icmbs[icmb].status;
- if (icmb_status & 0x80) { /* unsolicited - result in ICMB */
- dprintk("wd7000_intr: unsolicited interrupt 0x%02x\n", icmb_status);
- goto ack;
- }
-
- /* Aaaargh! (Zaga) */
- scb = isa_bus_to_virt(scsi2int((unchar *) icmbs[icmb].scbptr));
- icmbs[icmb].status = 0;
- if (scb->op & ICB_OP_MASK) { /* an SCB is done */
- icb = (IcbAny *) scb;
- icb->status = icmb_status;
- icb->phase = 0;
- goto ack;
- }
-
- SCpnt = scb->SCpnt;
- if (--(SCpnt->SCp.phase) <= 0) { /* all scbs are done */
- host_error = scb->vue | (icmb_status << 8);
- scsi_error = scb->status;
- errstatus = make_code(host_error, scsi_error);
- SCpnt->result = errstatus;
-
- free_scb(scb);
-
- SCpnt->scsi_done(SCpnt);
- }
-
- ack:
- dprintk("wd7000_intr: return from interrupt handler\n");
- wd7000_intr_ack(host);
-
- spin_unlock_irqrestore(host->sh->host_lock, flags);
- return IRQ_HANDLED;
-}
-
-static int wd7000_queuecommand_lck(struct scsi_cmnd *SCpnt,
- void (*done)(struct scsi_cmnd *))
-{
- Scb *scb;
- Sgb *sgb;
- unchar *cdb = (unchar *) SCpnt->cmnd;
- unchar idlun;
- short cdblen;
- int nseg;
- Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
-
- cdblen = SCpnt->cmd_len;
- idlun = ((SCpnt->device->id << 5) & 0xe0) | (SCpnt->device->lun & 7);
- SCpnt->scsi_done = done;
- SCpnt->SCp.phase = 1;
- scb = alloc_scbs(SCpnt->device->host, 1);
- scb->idlun = idlun;
- memcpy(scb->cdb, cdb, cdblen);
- scb->direc = 0x40; /* Disable direction check */
-
- scb->SCpnt = SCpnt; /* so we can find stuff later */
- SCpnt->host_scribble = (unchar *) scb;
- scb->host = host;
-
- nseg = scsi_sg_count(SCpnt);
- if (nseg > 1) {
- struct scatterlist *sg;
- unsigned i;
-
- dprintk("Using scatter/gather with %d elements.\n", nseg);
-
- sgb = scb->sgb;
- scb->op = 1;
- any2scsi(scb->dataptr, (int) sgb);
- any2scsi(scb->maxlen, nseg * sizeof(Sgb));
-
- scsi_for_each_sg(SCpnt, sg, nseg, i) {
- any2scsi(sgb[i].ptr, isa_page_to_bus(sg_page(sg)) + sg->offset);
- any2scsi(sgb[i].len, sg->length);
- }
- } else {
- scb->op = 0;
- if (nseg) {
- struct scatterlist *sg = scsi_sglist(SCpnt);
- any2scsi(scb->dataptr, isa_page_to_bus(sg_page(sg)) + sg->offset);
- }
- any2scsi(scb->maxlen, scsi_bufflen(SCpnt));
- }
-
- /* FIXME: drop lock and yield here ? */
-
- while (!mail_out(host, scb))
- cpu_relax(); /* keep trying */
-
- return 0;
-}
-
-static DEF_SCSI_QCMD(wd7000_queuecommand)
-
-static int wd7000_diagnostics(Adapter * host, int code)
-{
- static IcbDiag icb = { ICB_OP_DIAGNOSTICS };
- static unchar buf[256];
- unsigned long timeout;
-
- icb.type = code;
- any2scsi(icb.len, sizeof(buf));
- any2scsi(icb.ptr, (int) &buf);
- icb.phase = 1;
- /*
- * This routine is only called at init, so there should be OGMBs
- * available. I'm assuming so here. If this is going to
- * fail, I can just let the timeout catch the failure.
- */
- mail_out(host, (struct scb *) &icb);
- timeout = jiffies + WAITnexttimeout; /* wait up to 2 seconds */
- while (icb.phase && time_before(jiffies, timeout)) {
- cpu_relax(); /* wait for completion */
- barrier();
- }
-
- if (icb.phase) {
- printk("wd7000_diagnostics: timed out.\n");
- return (0);
- }
- if (make_code(icb.vue | (icb.status << 8), 0)) {
- printk("wd7000_diagnostics: failed (0x%02x,0x%02x)\n", icb.vue, icb.status);
- return (0);
- }
-
- return (1);
-}
-
-
-static int wd7000_adapter_reset(Adapter * host)
-{
- InitCmd init_cmd = {
- INITIALIZATION,
- 7,
- host->bus_on,
- host->bus_off,
- 0,
- {0, 0, 0},
- OGMB_CNT,
- ICMB_CNT
- };
- int diag;
- /*
- * Reset the adapter - only. The SCSI bus was initialized at power-up,
- * and we need to do this just so we control the mailboxes, etc.
- */
- outb(ASC_RES, host->iobase + ASC_CONTROL);
- udelay(40); /* reset pulse: this is 40us, only need 25us */
- outb(0, host->iobase + ASC_CONTROL);
- host->control = 0; /* this must always shadow ASC_CONTROL */
-
- if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
- printk(KERN_ERR "wd7000_init: WAIT timed out.\n");
- return -1; /* -1 = not ok */
- }
-
- if ((diag = inb(host->iobase + ASC_INTR_STAT)) != 1) {
- printk("wd7000_init: ");
-
- switch (diag) {
- case 2:
- printk(KERN_ERR "RAM failure.\n");
- break;
- case 3:
- printk(KERN_ERR "FIFO R/W failed\n");
- break;
- case 4:
- printk(KERN_ERR "SBIC register R/W failed\n");
- break;
- case 5:
- printk(KERN_ERR "Initialization D-FF failed.\n");
- break;
- case 6:
- printk(KERN_ERR "Host IRQ D-FF failed.\n");
- break;
- case 7:
- printk(KERN_ERR "ROM checksum error.\n");
- break;
- default:
- printk(KERN_ERR "diagnostic code 0x%02Xh received.\n", diag);
- }
- return -1;
- }
- /* Clear mailboxes */
- memset(&(host->mb), 0, sizeof(host->mb));
-
- /* Execute init command */
- any2scsi((unchar *) & (init_cmd.mailboxes), (int) &(host->mb));
- if (!command_out(host, (unchar *) & init_cmd, sizeof(init_cmd))) {
- printk(KERN_ERR "wd7000_adapter_reset: adapter initialization failed.\n");
- return -1;
- }
-
- if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, ASC_INIT, 0)) {
- printk("wd7000_adapter_reset: WAIT timed out.\n");
- return -1;
- }
- return 0;
-}
-
-static int wd7000_init(Adapter * host)
-{
- if (wd7000_adapter_reset(host) == -1)
- return 0;
-
-
- if (request_irq(host->irq, wd7000_intr, 0, "wd7000", host)) {
- printk("wd7000_init: can't get IRQ %d.\n", host->irq);
- return (0);
- }
- if (request_dma(host->dma, "wd7000")) {
- printk("wd7000_init: can't get DMA channel %d.\n", host->dma);
- free_irq(host->irq, host);
- return (0);
- }
- wd7000_enable_dma(host);
- wd7000_enable_intr(host);
-
- if (!wd7000_diagnostics(host, ICB_DIAG_FULL)) {
- free_dma(host->dma);
- free_irq(host->irq, NULL);
- return (0);
- }
-
- return (1);
-}
-
-
-static void wd7000_revision(Adapter * host)
-{
- static IcbRevLvl icb = { ICB_OP_GET_REVISION };
-
- icb.phase = 1;
- /*
- * Like diagnostics, this is only done at init time, in fact, from
- * wd7000_detect, so there should be OGMBs available. If it fails,
- * the only damage will be that the revision will show up as 0.0,
- * which in turn means that scatter/gather will be disabled.
- */
- mail_out(host, (struct scb *) &icb);
- while (icb.phase) {
- cpu_relax(); /* wait for completion */
- barrier();
- }
- host->rev1 = icb.primary;
- host->rev2 = icb.secondary;
-}
-
-
-static int wd7000_set_info(struct Scsi_Host *host, char *buffer, int length)
-{
- dprintk("Buffer = <%.*s>, length = %d\n", length, buffer, length);
-
- /*
- * Currently this is a no-op
- */
- dprintk("Sorry, this function is currently out of order...\n");
- return (length);
-}
-
-
-static int wd7000_show_info(struct seq_file *m, struct Scsi_Host *host)
-{
- Adapter *adapter = (Adapter *)host->hostdata;
- unsigned long flags;
-#ifdef WD7000_DEBUG
- Mailbox *ogmbs, *icmbs;
- short count;
-#endif
-
- spin_lock_irqsave(host->host_lock, flags);
- seq_printf(m, "Host scsi%d: Western Digital WD-7000 (rev %d.%d)\n", host->host_no, adapter->rev1, adapter->rev2);
- seq_printf(m, " IO base: 0x%x\n", adapter->iobase);
- seq_printf(m, " IRQ: %d\n", adapter->irq);
- seq_printf(m, " DMA channel: %d\n", adapter->dma);
- seq_printf(m, " Interrupts: %d\n", adapter->int_counter);
- seq_printf(m, " BUS_ON time: %d nanoseconds\n", adapter->bus_on * 125);
- seq_printf(m, " BUS_OFF time: %d nanoseconds\n", adapter->bus_off * 125);
-
-#ifdef WD7000_DEBUG
- ogmbs = adapter->mb.ogmb;
- icmbs = adapter->mb.icmb;
-
- seq_printf(m, "\nControl port value: 0x%x\n", adapter->control);
- seq_puts(m, "Incoming mailbox:\n");
- seq_printf(m, " size: %d\n", ICMB_CNT);
- seq_puts(m, " queued messages: ");
-
- for (i = count = 0; i < ICMB_CNT; i++)
- if (icmbs[i].status) {
- count++;
- seq_printf(m, "0x%x ", i);
- }
-
- seq_puts(m, count ? "\n" : "none\n");
-
- seq_puts(m, "Outgoing mailbox:\n");
- seq_printf(m, " size: %d\n", OGMB_CNT);
- seq_printf(m, " next message: 0x%x\n", adapter->next_ogmb);
- seq_puts(m, " queued messages: ");
-
- for (i = count = 0; i < OGMB_CNT; i++)
- if (ogmbs[i].status) {
- count++;
- seq_printf(m, "0x%x ", i);
- }
-
- seq_puts(m, count ? "\n" : "none\n");
-#endif
-
- spin_unlock_irqrestore(host->host_lock, flags);
-
- return 0;
-}
-
-
-/*
- * Returns the number of adapters this driver is supporting.
- *
- * The source for hosts.c says to wait to call scsi_register until 100%
- * sure about an adapter. We need to do it a little sooner here; we
- * need the storage set up by scsi_register before wd7000_init, and
- * changing the location of an Adapter structure is more trouble than
- * calling scsi_unregister.
- *
- */
-
-static __init int wd7000_detect(struct scsi_host_template *tpnt)
-{
- short present = 0, biosaddr_ptr, sig_ptr, i, pass;
- short biosptr[NUM_CONFIGS];
- unsigned iobase;
- Adapter *host = NULL;
- struct Scsi_Host *sh;
- int unit = 0;
-
- dprintk("wd7000_detect: started\n");
-
-#ifdef MODULE
- if (wd7000)
- wd7000_setup(wd7000);
-#endif
-
- for (i = 0; i < UNITS; wd7000_host[i++] = NULL);
- for (i = 0; i < NUM_CONFIGS; biosptr[i++] = -1);
-
- tpnt->proc_name = "wd7000";
- tpnt->show_info = &wd7000_show_info;
- tpnt->write_info = wd7000_set_info;
-
- /*
- * Set up SCB free list, which is shared by all adapters
- */
- init_scbs();
-
- for (pass = 0; pass < NUM_CONFIGS; pass++) {
- /*
- * First, search for BIOS SIGNATURE...
- */
- for (biosaddr_ptr = 0; biosaddr_ptr < NUM_ADDRS; biosaddr_ptr++)
- for (sig_ptr = 0; sig_ptr < NUM_SIGNATURES; sig_ptr++) {
- for (i = 0; i < pass; i++)
- if (biosptr[i] == biosaddr_ptr)
- break;
-
- if (i == pass) {
- void __iomem *biosaddr = ioremap(wd7000_biosaddr[biosaddr_ptr] + signatures[sig_ptr].ofs,
- signatures[sig_ptr].len);
- short bios_match = 1;
-
- if (biosaddr)
- bios_match = check_signature(biosaddr, signatures[sig_ptr].sig, signatures[sig_ptr].len);
-
- iounmap(biosaddr);
-
- if (bios_match)
- goto bios_matched;
- }
- }
-
- bios_matched:
- /*
- * BIOS SIGNATURE has been found.
- */
-#ifdef WD7000_DEBUG
- dprintk("wd7000_detect: pass %d\n", pass + 1);
-
- if (biosaddr_ptr == NUM_ADDRS)
- dprintk("WD-7000 SST BIOS not detected...\n");
- else
- dprintk("WD-7000 SST BIOS detected at 0x%lx: checking...\n", wd7000_biosaddr[biosaddr_ptr]);
-#endif
-
- if (configs[pass].irq < 0)
- continue;
-
- if (unit == UNITS)
- continue;
-
- iobase = configs[pass].iobase;
-
- dprintk("wd7000_detect: check IO 0x%x region...\n", iobase);
-
- if (request_region(iobase, 4, "wd7000")) {
-
- dprintk("wd7000_detect: ASC reset (IO 0x%x) ...", iobase);
- /*
- * ASC reset...
- */
- outb(ASC_RES, iobase + ASC_CONTROL);
- msleep(10);
- outb(0, iobase + ASC_CONTROL);
-
- if (WAIT(iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
- dprintk("failed!\n");
- goto err_release;
- } else
- dprintk("ok!\n");
-
- if (inb(iobase + ASC_INTR_STAT) == 1) {
- /*
- * We register here, to get a pointer to the extra space,
- * which we'll use as the Adapter structure (host) for
- * this adapter. It is located just after the registered
- * Scsi_Host structure (sh), and is located by the empty
- * array hostdata.
- */
- sh = scsi_register(tpnt, sizeof(Adapter));
- if (sh == NULL)
- goto err_release;
-
- host = (Adapter *) sh->hostdata;
-
- dprintk("wd7000_detect: adapter allocated at 0x%x\n", (int) host);
- memset(host, 0, sizeof(Adapter));
-
- host->irq = configs[pass].irq;
- host->dma = configs[pass].dma;
- host->iobase = iobase;
- host->int_counter = 0;
- host->bus_on = configs[pass].bus_on;
- host->bus_off = configs[pass].bus_off;
- host->sh = wd7000_host[unit] = sh;
- unit++;
-
- dprintk("wd7000_detect: Trying init WD-7000 card at IO " "0x%x, IRQ %d, DMA %d...\n", host->iobase, host->irq, host->dma);
-
- if (!wd7000_init(host)) /* Initialization failed */
- goto err_unregister;
-
- /*
- * OK from here - we'll use this adapter/configuration.
- */
- wd7000_revision(host); /* important for scatter/gather */
-
- /*
- * For boards before rev 6.0, scatter/gather isn't supported.
- */
- if (host->rev1 < 6)
- sh->sg_tablesize = 1;
-
- present++; /* count it */
-
- if (biosaddr_ptr != NUM_ADDRS)
- biosptr[pass] = biosaddr_ptr;
-
- printk(KERN_INFO "Western Digital WD-7000 (rev %d.%d) ", host->rev1, host->rev2);
- printk("using IO 0x%x, IRQ %d, DMA %d.\n", host->iobase, host->irq, host->dma);
- printk(" BUS_ON time: %dns, BUS_OFF time: %dns\n", host->bus_on * 125, host->bus_off * 125);
- }
- } else
- dprintk("wd7000_detect: IO 0x%x region already allocated!\n", iobase);
-
- continue;
-
- err_unregister:
- scsi_unregister(sh);
- err_release:
- release_region(iobase, 4);
-
- }
-
- if (!present)
- printk("Failed initialization of WD-7000 SCSI card!\n");
-
- return (present);
-}
-
-static int wd7000_release(struct Scsi_Host *shost)
-{
- if (shost->irq)
- free_irq(shost->irq, NULL);
- if (shost->io_port && shost->n_io_port)
- release_region(shost->io_port, shost->n_io_port);
- scsi_unregister(shost);
- return 0;
-}
-
-#if 0
-/*
- * I have absolutely NO idea how to do an abort with the WD7000...
- */
-static int wd7000_abort(Scsi_Cmnd * SCpnt)
-{
- Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
-
- if (inb(host->iobase + ASC_STAT) & INT_IM) {
- printk("wd7000_abort: lost interrupt\n");
- wd7000_intr_handle(host->irq, NULL, NULL);
- return FAILED;
- }
- return FAILED;
-}
-#endif
-
-/*
- * Last resort. Reinitialize the board.
- */
-
-static int wd7000_host_reset(struct scsi_cmnd *SCpnt)
-{
- Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
-
- spin_lock_irq(SCpnt->device->host->host_lock);
-
- if (wd7000_adapter_reset(host) < 0) {
- spin_unlock_irq(SCpnt->device->host->host_lock);
- return FAILED;
- }
-
- wd7000_enable_intr(host);
-
- spin_unlock_irq(SCpnt->device->host->host_lock);
- return SUCCESS;
-}
-
-/*
- * This was borrowed directly from aha1542.c. (Zaga)
- */
-
-static int wd7000_biosparam(struct scsi_device *sdev,
- struct block_device *bdev, sector_t capacity, int *ip)
-{
- char b[BDEVNAME_SIZE];
-
- dprintk("wd7000_biosparam: dev=%s, size=%llu, ",
- bdevname(bdev, b), (u64)capacity);
- (void)b; /* unused var warning? */
-
- /*
- * try default translation
- */
- ip[0] = 64;
- ip[1] = 32;
- ip[2] = capacity >> 11;
-
- /*
- * for disks >1GB do some guessing
- */
- if (ip[2] >= 1024) {
- int info[3];
-
- /*
- * try to figure out the geometry from the partition table
- */
- if ((scsicam_bios_param(bdev, capacity, info) < 0) || !(((info[0] == 64) && (info[1] == 32)) || ((info[0] == 255) && (info[1] == 63)))) {
- printk("wd7000_biosparam: unable to verify geometry for disk with >1GB.\n" " using extended translation.\n");
-
- ip[0] = 255;
- ip[1] = 63;
- ip[2] = (unsigned long) capacity / (255 * 63);
- } else {
- ip[0] = info[0];
- ip[1] = info[1];
- ip[2] = info[2];
-
- if (info[0] == 255)
- printk(KERN_INFO "%s: current partition table is " "using extended translation.\n", __func__);
- }
- }
-
- dprintk("bios geometry: head=%d, sec=%d, cyl=%d\n", ip[0], ip[1], ip[2]);
- dprintk("WARNING: check, if the bios geometry is correct.\n");
-
- return (0);
-}
-
-MODULE_AUTHOR("Thomas Wuensche, John Boyd, Miroslav Zagorac");
-MODULE_DESCRIPTION("Driver for the WD7000 series ISA controllers");
-MODULE_LICENSE("GPL");
-
-static struct scsi_host_template driver_template = {
- .proc_name = "wd7000",
- .show_info = wd7000_show_info,
- .write_info = wd7000_set_info,
- .name = "Western Digital WD-7000",
- .detect = wd7000_detect,
- .release = wd7000_release,
- .queuecommand = wd7000_queuecommand,
- .eh_host_reset_handler = wd7000_host_reset,
- .bios_param = wd7000_biosparam,
- .can_queue = WD7000_Q,
- .this_id = 7,
- .sg_tablesize = WD7000_SG,
- .unchecked_isa_dma = 1,
- .use_clustering = ENABLE_CLUSTERING,
-};
-
-#include "scsi_module.c"
projects / platform / kernel / linux-rpi.git / commitdiff