|
@@ -1,1667 +0,0 @@
|
|
-/*
|
|
|
|
- * seagate.c Copyright (C) 1992, 1993 Drew Eckhardt
|
|
|
|
- * low level scsi driver for ST01/ST02, Future Domain TMC-885,
|
|
|
|
- * TMC-950 by Drew Eckhardt <drew@colorado.edu>
|
|
|
|
- *
|
|
|
|
- * Note : TMC-880 boards don't work because they have two bits in
|
|
|
|
- * the status register flipped, I'll fix this "RSN"
|
|
|
|
- * [why do I have strong feeling that above message is from 1993? :-)
|
|
|
|
- * pavel@ucw.cz]
|
|
|
|
- *
|
|
|
|
- * This card does all the I/O via memory mapped I/O, so there is no need
|
|
|
|
- * to check or allocate a region of the I/O address space.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-/* 1996 - to use new read{b,w,l}, write{b,w,l}, and phys_to_virt
|
|
|
|
- * macros, replaced assembler routines with C. There's probably a
|
|
|
|
- * performance hit, but I only have a cdrom and can't tell. Define
|
|
|
|
- * SEAGATE_USE_ASM if you want the old assembler code -- SJT
|
|
|
|
- *
|
|
|
|
- * 1998-jul-29 - created DPRINTK macros and made it work under
|
|
|
|
- * linux 2.1.112, simplified some #defines etc. <pavel@ucw.cz>
|
|
|
|
- *
|
|
|
|
- * Aug 2000 - aeb - deleted seagate_st0x_biosparam(). It would try to
|
|
|
|
- * read the physical disk geometry, a bad mistake. Of course it doesn't
|
|
|
|
- * matter much what geometry one invents, but on large disks it
|
|
|
|
- * returned 256 (or more) heads, causing all kind of failures.
|
|
|
|
- * Of course this means that people might see a different geometry now,
|
|
|
|
- * so boot parameters may be necessary in some cases.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * Configuration :
|
|
|
|
- * To use without BIOS -DOVERRIDE=base_address -DCONTROLLER=FD or SEAGATE
|
|
|
|
- * -DIRQ will override the default of 5.
|
|
|
|
- * Note: You can now set these options from the kernel's "command line".
|
|
|
|
- * The syntax is:
|
|
|
|
- *
|
|
|
|
- * st0x=ADDRESS,IRQ (for a Seagate controller)
|
|
|
|
- * or:
|
|
|
|
- * tmc8xx=ADDRESS,IRQ (for a TMC-8xx or TMC-950 controller)
|
|
|
|
- * eg:
|
|
|
|
- * tmc8xx=0xC8000,15
|
|
|
|
- *
|
|
|
|
- * will configure the driver for a TMC-8xx style controller using IRQ 15
|
|
|
|
- * with a base address of 0xC8000.
|
|
|
|
- *
|
|
|
|
- * -DARBITRATE
|
|
|
|
- * Will cause the host adapter to arbitrate for the
|
|
|
|
- * bus for better SCSI-II compatibility, rather than just
|
|
|
|
- * waiting for BUS FREE and then doing its thing. Should
|
|
|
|
- * let us do one command per Lun when I integrate my
|
|
|
|
- * reorganization changes into the distribution sources.
|
|
|
|
- *
|
|
|
|
- * -DDEBUG=65535
|
|
|
|
- * Will activate debug code.
|
|
|
|
- *
|
|
|
|
- * -DFAST or -DFAST32
|
|
|
|
- * Will use blind transfers where possible
|
|
|
|
- *
|
|
|
|
- * -DPARITY
|
|
|
|
- * This will enable parity.
|
|
|
|
- *
|
|
|
|
- * -DSEAGATE_USE_ASM
|
|
|
|
- * Will use older seagate assembly code. should be (very small amount)
|
|
|
|
- * Faster.
|
|
|
|
- *
|
|
|
|
- * -DSLOW_RATE=50
|
|
|
|
- * Will allow compatibility with broken devices that don't
|
|
|
|
- * handshake fast enough (ie, some CD ROM's) for the Seagate
|
|
|
|
- * code.
|
|
|
|
- *
|
|
|
|
- * 50 is some number, It will let you specify a default
|
|
|
|
- * transfer rate if handshaking isn't working correctly.
|
|
|
|
- *
|
|
|
|
- * -DOLDCNTDATASCEME There is a new sceme to set the CONTROL
|
|
|
|
- * and DATA reigsters which complies more closely
|
|
|
|
- * with the SCSI2 standard. This hopefully eliminates
|
|
|
|
- * the need to swap the order these registers are
|
|
|
|
- * 'messed' with. It makes the following two options
|
|
|
|
- * obsolete. To reenable the old sceme define this.
|
|
|
|
- *
|
|
|
|
- * The following to options are patches from the SCSI.HOWTO
|
|
|
|
- *
|
|
|
|
- * -DSWAPSTAT This will swap the definitions for STAT_MSG and STAT_CD.
|
|
|
|
- *
|
|
|
|
- * -DSWAPCNTDATA This will swap the order that seagate.c messes with
|
|
|
|
- * the CONTROL an DATA registers.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-#include <linux/module.h>
|
|
|
|
-#include <linux/interrupt.h>
|
|
|
|
-#include <linux/spinlock.h>
|
|
|
|
-#include <linux/signal.h>
|
|
|
|
-#include <linux/string.h>
|
|
|
|
-#include <linux/proc_fs.h>
|
|
|
|
-#include <linux/init.h>
|
|
|
|
-#include <linux/blkdev.h>
|
|
|
|
-#include <linux/stat.h>
|
|
|
|
-#include <linux/delay.h>
|
|
|
|
-#include <linux/io.h>
|
|
|
|
-
|
|
|
|
-#include <asm/system.h>
|
|
|
|
-#include <asm/uaccess.h>
|
|
|
|
-
|
|
|
|
-#include <scsi/scsi_cmnd.h>
|
|
|
|
-#include <scsi/scsi_device.h>
|
|
|
|
-#include <scsi/scsi.h>
|
|
|
|
-
|
|
|
|
-#include <scsi/scsi_dbg.h>
|
|
|
|
-#include <scsi/scsi_host.h>
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-#ifdef DEBUG
|
|
|
|
-#define DPRINTK( when, msg... ) do { if ( (DEBUG & (when)) == (when) ) printk( msg ); } while (0)
|
|
|
|
-#else
|
|
|
|
-#define DPRINTK( when, msg... ) do { } while (0)
|
|
|
|
-#define DEBUG 0
|
|
|
|
-#endif
|
|
|
|
-#define DANY( msg... ) DPRINTK( 0xffff, msg );
|
|
|
|
-
|
|
|
|
-#ifndef IRQ
|
|
|
|
-#define IRQ 5
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-#ifdef FAST32
|
|
|
|
-#define FAST
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-#undef LINKED /* Linked commands are currently broken! */
|
|
|
|
-
|
|
|
|
-#if defined(OVERRIDE) && !defined(CONTROLLER)
|
|
|
|
-#error Please use -DCONTROLLER=SEAGATE or -DCONTROLLER=FD to override controller type
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-#ifndef __i386__
|
|
|
|
-#undef SEAGATE_USE_ASM
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- Thanks to Brian Antoine for the example code in his Messy-Loss ST-01
|
|
|
|
- driver, and Mitsugu Suzuki for information on the ST-01
|
|
|
|
- SCSI host.
|
|
|
|
-*/
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- CONTROL defines
|
|
|
|
-*/
|
|
|
|
-
|
|
|
|
-#define CMD_RST 0x01
|
|
|
|
-#define CMD_SEL 0x02
|
|
|
|
-#define CMD_BSY 0x04
|
|
|
|
-#define CMD_ATTN 0x08
|
|
|
|
-#define CMD_START_ARB 0x10
|
|
|
|
-#define CMD_EN_PARITY 0x20
|
|
|
|
-#define CMD_INTR 0x40
|
|
|
|
-#define CMD_DRVR_ENABLE 0x80
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- STATUS
|
|
|
|
-*/
|
|
|
|
-#ifdef SWAPSTAT
|
|
|
|
-#define STAT_MSG 0x08
|
|
|
|
-#define STAT_CD 0x02
|
|
|
|
-#else
|
|
|
|
-#define STAT_MSG 0x02
|
|
|
|
-#define STAT_CD 0x08
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-#define STAT_BSY 0x01
|
|
|
|
-#define STAT_IO 0x04
|
|
|
|
-#define STAT_REQ 0x10
|
|
|
|
-#define STAT_SEL 0x20
|
|
|
|
-#define STAT_PARITY 0x40
|
|
|
|
-#define STAT_ARB_CMPL 0x80
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- REQUESTS
|
|
|
|
-*/
|
|
|
|
-
|
|
|
|
-#define REQ_MASK (STAT_CD | STAT_IO | STAT_MSG)
|
|
|
|
-#define REQ_DATAOUT 0
|
|
|
|
-#define REQ_DATAIN STAT_IO
|
|
|
|
-#define REQ_CMDOUT STAT_CD
|
|
|
|
-#define REQ_STATIN (STAT_CD | STAT_IO)
|
|
|
|
-#define REQ_MSGOUT (STAT_MSG | STAT_CD)
|
|
|
|
-#define REQ_MSGIN (STAT_MSG | STAT_CD | STAT_IO)
|
|
|
|
-
|
|
|
|
-extern volatile int seagate_st0x_timeout;
|
|
|
|
-
|
|
|
|
-#ifdef PARITY
|
|
|
|
-#define BASE_CMD CMD_EN_PARITY
|
|
|
|
-#else
|
|
|
|
-#define BASE_CMD 0
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- Debugging code
|
|
|
|
-*/
|
|
|
|
-
|
|
|
|
-#define PHASE_BUS_FREE 1
|
|
|
|
-#define PHASE_ARBITRATION 2
|
|
|
|
-#define PHASE_SELECTION 4
|
|
|
|
-#define PHASE_DATAIN 8
|
|
|
|
-#define PHASE_DATAOUT 0x10
|
|
|
|
-#define PHASE_CMDOUT 0x20
|
|
|
|
-#define PHASE_MSGIN 0x40
|
|
|
|
-#define PHASE_MSGOUT 0x80
|
|
|
|
-#define PHASE_STATUSIN 0x100
|
|
|
|
-#define PHASE_ETC (PHASE_DATAIN | PHASE_DATAOUT | PHASE_CMDOUT | PHASE_MSGIN | PHASE_MSGOUT | PHASE_STATUSIN)
|
|
|
|
-#define PRINT_COMMAND 0x200
|
|
|
|
-#define PHASE_EXIT 0x400
|
|
|
|
-#define PHASE_RESELECT 0x800
|
|
|
|
-#define DEBUG_FAST 0x1000
|
|
|
|
-#define DEBUG_SG 0x2000
|
|
|
|
-#define DEBUG_LINKED 0x4000
|
|
|
|
-#define DEBUG_BORKEN 0x8000
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * Control options - these are timeouts specified in .01 seconds.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-/* 30, 20 work */
|
|
|
|
-#define ST0X_BUS_FREE_DELAY 25
|
|
|
|
-#define ST0X_SELECTION_DELAY 25
|
|
|
|
-
|
|
|
|
-#define SEAGATE 1 /* these determine the type of the controller */
|
|
|
|
-#define FD 2
|
|
|
|
-
|
|
|
|
-#define ST0X_ID_STR "Seagate ST-01/ST-02"
|
|
|
|
-#define FD_ID_STR "TMC-8XX/TMC-950"
|
|
|
|
-
|
|
|
|
-static int internal_command (unsigned char target, unsigned char lun,
|
|
|
|
- const void *cmnd,
|
|
|
|
- void *buff, int bufflen, int reselect);
|
|
|
|
-
|
|
|
|
-static int incommand; /* set if arbitration has finished
|
|
|
|
- and we are in some command phase. */
|
|
|
|
-
|
|
|
|
-static unsigned int base_address = 0; /* Where the card ROM starts, used to
|
|
|
|
- calculate memory mapped register
|
|
|
|
- location. */
|
|
|
|
-
|
|
|
|
-static void __iomem *st0x_cr_sr; /* control register write, status
|
|
|
|
- register read. 256 bytes in
|
|
|
|
- length.
|
|
|
|
- Read is status of SCSI BUS, as per
|
|
|
|
- STAT masks. */
|
|
|
|
-
|
|
|
|
-static void __iomem *st0x_dr; /* data register, read write 256
|
|
|
|
- bytes in length. */
|
|
|
|
-
|
|
|
|
-static volatile int st0x_aborted = 0; /* set when we are aborted, ie by a
|
|
|
|
- time out, etc. */
|
|
|
|
-
|
|
|
|
-static unsigned char controller_type = 0; /* set to SEAGATE for ST0x
|
|
|
|
- boards or FD for TMC-8xx
|
|
|
|
- boards */
|
|
|
|
-static int irq = IRQ;
|
|
|
|
-
|
|
|
|
-module_param(base_address, uint, 0);
|
|
|
|
-module_param(controller_type, byte, 0);
|
|
|
|
-module_param(irq, int, 0);
|
|
|
|
-MODULE_LICENSE("GPL");
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-#define retcode(result) (((result) << 16) | (message << 8) | status)
|
|
|
|
-#define STATUS ((u8) readb(st0x_cr_sr))
|
|
|
|
-#define DATA ((u8) readb(st0x_dr))
|
|
|
|
-#define WRITE_CONTROL(d) { writeb((d), st0x_cr_sr); }
|
|
|
|
-#define WRITE_DATA(d) { writeb((d), st0x_dr); }
|
|
|
|
-
|
|
|
|
-#ifndef OVERRIDE
|
|
|
|
-static unsigned int seagate_bases[] = {
|
|
|
|
- 0xc8000, 0xca000, 0xcc000,
|
|
|
|
- 0xce000, 0xdc000, 0xde000
|
|
|
|
-};
|
|
|
|
-
|
|
|
|
-typedef struct {
|
|
|
|
- const unsigned char *signature;
|
|
|
|
- unsigned offset;
|
|
|
|
- unsigned length;
|
|
|
|
- unsigned char type;
|
|
|
|
-} Signature;
|
|
|
|
-
|
|
|
|
-static Signature __initdata signatures[] = {
|
|
|
|
- {"ST01 v1.7 (C) Copyright 1987 Seagate", 15, 37, SEAGATE},
|
|
|
|
- {"SCSI BIOS 2.00 (C) Copyright 1987 Seagate", 15, 40, SEAGATE},
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * The following two lines are NOT mistakes. One detects ROM revision
|
|
|
|
- * 3.0.0, the other 3.2. Since seagate has only one type of SCSI adapter,
|
|
|
|
- * and this is not going to change, the "SEAGATE" and "SCSI" together
|
|
|
|
- * are probably "good enough"
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- {"SEAGATE SCSI BIOS ", 16, 17, SEAGATE},
|
|
|
|
- {"SEAGATE SCSI BIOS ", 17, 17, SEAGATE},
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * However, future domain makes several incompatible SCSI boards, so specific
|
|
|
|
- * signatures must be used.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- {"FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89", 5, 46, FD},
|
|
|
|
- {"FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89", 5, 46, FD},
|
|
|
|
- {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90", 5, 47, FD},
|
|
|
|
- {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90", 5, 47, FD},
|
|
|
|
- {"FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90", 5, 46, FD},
|
|
|
|
- {"FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92", 5, 44, FD},
|
|
|
|
- {"IBM F1 BIOS V1.1004/30/92", 5, 25, FD},
|
|
|
|
- {"FUTURE DOMAIN TMC-950", 5, 21, FD},
|
|
|
|
- /* Added for 2.2.16 by Matthias_Heidbrink@b.maus.de */
|
|
|
|
- {"IBM F1 V1.2009/22/93", 5, 25, FD},
|
|
|
|
-};
|
|
|
|
-
|
|
|
|
-#define NUM_SIGNATURES ARRAY_SIZE(signatures)
|
|
|
|
-#endif /* n OVERRIDE */
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * hostno stores the hostnumber, as told to us by the init routine.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-static int hostno = -1;
|
|
|
|
-static void seagate_reconnect_intr (int, void *);
|
|
|
|
-static irqreturn_t do_seagate_reconnect_intr (int, void *);
|
|
|
|
-static int seagate_st0x_bus_reset(struct scsi_cmnd *);
|
|
|
|
-
|
|
|
|
-#ifdef FAST
|
|
|
|
-static int fast = 1;
|
|
|
|
-#else
|
|
|
|
-#define fast 0
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-#ifdef SLOW_RATE
|
|
|
|
-/*
|
|
|
|
- * Support for broken devices :
|
|
|
|
- * The Seagate board has a handshaking problem. Namely, a lack
|
|
|
|
- * thereof for slow devices. You can blast 600K/second through
|
|
|
|
- * it if you are polling for each byte, more if you do a blind
|
|
|
|
- * transfer. In the first case, with a fast device, REQ will
|
|
|
|
- * transition high-low or high-low-high before your loop restarts
|
|
|
|
- * and you'll have no problems. In the second case, the board
|
|
|
|
- * will insert wait states for up to 13.2 usecs for REQ to
|
|
|
|
- * transition low->high, and everything will work.
|
|
|
|
- *
|
|
|
|
- * However, there's nothing in the state machine that says
|
|
|
|
- * you *HAVE* to see a high-low-high set of transitions before
|
|
|
|
- * sending the next byte, and slow things like the Trantor CD ROMS
|
|
|
|
- * will break because of this.
|
|
|
|
- *
|
|
|
|
- * So, we need to slow things down, which isn't as simple as it
|
|
|
|
- * seems. We can't slow things down period, because then people
|
|
|
|
- * who don't recompile their kernels will shoot me for ruining
|
|
|
|
- * their performance. We need to do it on a case per case basis.
|
|
|
|
- *
|
|
|
|
- * The best for performance will be to, only for borken devices
|
|
|
|
- * (this is stored on a per-target basis in the scsi_devices array)
|
|
|
|
- *
|
|
|
|
- * Wait for a low->high transition before continuing with that
|
|
|
|
- * transfer. If we timeout, continue anyways. We don't need
|
|
|
|
- * a long timeout, because REQ should only be asserted until the
|
|
|
|
- * corresponding ACK is received and processed.
|
|
|
|
- *
|
|
|
|
- * Note that we can't use the system timer for this, because of
|
|
|
|
- * resolution, and we *really* can't use the timer chip since
|
|
|
|
- * gettimeofday() and the beeper routines use that. So,
|
|
|
|
- * the best thing for us to do will be to calibrate a timing
|
|
|
|
- * loop in the initialization code using the timer chip before
|
|
|
|
- * gettimeofday() can screw with it.
|
|
|
|
- *
|
|
|
|
- * FIXME: this is broken (not borken :-). Empty loop costs less than
|
|
|
|
- * loop with ISA access in it! -- pavel@ucw.cz
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-static int borken_calibration = 0;
|
|
|
|
-
|
|
|
|
-static void __init borken_init (void)
|
|
|
|
-{
|
|
|
|
- register int count = 0, start = jiffies + 1, stop = start + 25;
|
|
|
|
-
|
|
|
|
- /* FIXME: There may be a better approach, this is a straight port for
|
|
|
|
- now */
|
|
|
|
- preempt_disable();
|
|
|
|
- while (time_before (jiffies, start))
|
|
|
|
- cpu_relax();
|
|
|
|
- for (; time_before (jiffies, stop); ++count)
|
|
|
|
- cpu_relax();
|
|
|
|
- preempt_enable();
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * Ok, we now have a count for .25 seconds. Convert to a
|
|
|
|
- * count per second and divide by transfer rate in K. */
|
|
|
|
-
|
|
|
|
- borken_calibration = (count * 4) / (SLOW_RATE * 1024);
|
|
|
|
-
|
|
|
|
- if (borken_calibration < 1)
|
|
|
|
- borken_calibration = 1;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static inline void borken_wait (void)
|
|
|
|
-{
|
|
|
|
- register int count;
|
|
|
|
-
|
|
|
|
- for (count = borken_calibration; count && (STATUS & STAT_REQ); --count)
|
|
|
|
- cpu_relax();
|
|
|
|
-
|
|
|
|
-#if (DEBUG & DEBUG_BORKEN)
|
|
|
|
- if (count)
|
|
|
|
- printk ("scsi%d : borken timeout\n", hostno);
|
|
|
|
-#endif
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-#endif /* def SLOW_RATE */
|
|
|
|
-
|
|
|
|
-/* These beasts only live on ISA, and ISA means 8MHz. Each ULOOP()
|
|
|
|
- * contains at least one ISA access, which takes more than 0.125
|
|
|
|
- * usec. So if we loop 8 times time in usec, we are safe.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-#define ULOOP( i ) for (clock = i*8;;)
|
|
|
|
-#define TIMEOUT (!(clock--))
|
|
|
|
-
|
|
|
|
-static int __init seagate_st0x_detect (struct scsi_host_template * tpnt)
|
|
|
|
-{
|
|
|
|
- struct Scsi_Host *instance;
|
|
|
|
- int i, j;
|
|
|
|
- unsigned long cr, dr;
|
|
|
|
-
|
|
|
|
- tpnt->proc_name = "seagate";
|
|
|
|
-/*
|
|
|
|
- * First, we try for the manual override.
|
|
|
|
- */
|
|
|
|
- DANY ("Autodetecting ST0x / TMC-8xx\n");
|
|
|
|
-
|
|
|
|
- if (hostno != -1) {
|
|
|
|
- printk (KERN_ERR "seagate_st0x_detect() called twice?!\n");
|
|
|
|
- return 0;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
-/* If the user specified the controller type from the command line,
|
|
|
|
- controller_type will be non-zero, so don't try to detect one */
|
|
|
|
-
|
|
|
|
- if (!controller_type) {
|
|
|
|
-#ifdef OVERRIDE
|
|
|
|
- base_address = OVERRIDE;
|
|
|
|
- controller_type = CONTROLLER;
|
|
|
|
-
|
|
|
|
- DANY ("Base address overridden to %x, controller type is %s\n",
|
|
|
|
- base_address,
|
|
|
|
- controller_type == SEAGATE ? "SEAGATE" : "FD");
|
|
|
|
-#else /* OVERRIDE */
|
|
|
|
-/*
|
|
|
|
- * To detect this card, we simply look for the signature
|
|
|
|
- * from the BIOS version notice in all the possible locations
|
|
|
|
- * of the ROM's. This has a nice side effect of not trashing
|
|
|
|
- * any register locations that might be used by something else.
|
|
|
|
- *
|
|
|
|
- * XXX - note that we probably should be probing the address
|
|
|
|
- * space for the on-board RAM instead.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- for (i = 0; i < ARRAY_SIZE(seagate_bases); ++i) {
|
|
|
|
- void __iomem *p = ioremap(seagate_bases[i], 0x2000);
|
|
|
|
- if (!p)
|
|
|
|
- continue;
|
|
|
|
- for (j = 0; j < NUM_SIGNATURES; ++j)
|
|
|
|
- if (check_signature(p + signatures[j].offset, signatures[j].signature, signatures[j].length)) {
|
|
|
|
- base_address = seagate_bases[i];
|
|
|
|
- controller_type = signatures[j].type;
|
|
|
|
- break;
|
|
|
|
- }
|
|
|
|
- iounmap(p);
|
|
|
|
- }
|
|
|
|
-#endif /* OVERRIDE */
|
|
|
|
- }
|
|
|
|
- /* (! controller_type) */
|
|
|
|
- tpnt->this_id = (controller_type == SEAGATE) ? 7 : 6;
|
|
|
|
- tpnt->name = (controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR;
|
|
|
|
-
|
|
|
|
- if (!base_address) {
|
|
|
|
- printk(KERN_INFO "seagate: ST0x/TMC-8xx not detected.\n");
|
|
|
|
- return 0;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- cr = base_address + (controller_type == SEAGATE ? 0x1a00 : 0x1c00);
|
|
|
|
- dr = cr + 0x200;
|
|
|
|
- st0x_cr_sr = ioremap(cr, 0x100);
|
|
|
|
- st0x_dr = ioremap(dr, 0x100);
|
|
|
|
-
|
|
|
|
- DANY("%s detected. Base address = %x, cr = %x, dr = %x\n",
|
|
|
|
- tpnt->name, base_address, cr, dr);
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * At all times, we will use IRQ 5. Should also check for IRQ3
|
|
|
|
- * if we lose our first interrupt.
|
|
|
|
- */
|
|
|
|
- instance = scsi_register (tpnt, 0);
|
|
|
|
- if (instance == NULL)
|
|
|
|
- return 0;
|
|
|
|
-
|
|
|
|
- hostno = instance->host_no;
|
|
|
|
- if (request_irq (irq, do_seagate_reconnect_intr, IRQF_DISABLED, (controller_type == SEAGATE) ? "seagate" : "tmc-8xx", instance)) {
|
|
|
|
- printk(KERN_ERR "scsi%d : unable to allocate IRQ%d\n", hostno, irq);
|
|
|
|
- return 0;
|
|
|
|
- }
|
|
|
|
- instance->irq = irq;
|
|
|
|
- instance->io_port = base_address;
|
|
|
|
-#ifdef SLOW_RATE
|
|
|
|
- printk(KERN_INFO "Calibrating borken timer... ");
|
|
|
|
- borken_init();
|
|
|
|
- printk(" %d cycles per transfer\n", borken_calibration);
|
|
|
|
-#endif
|
|
|
|
- printk (KERN_INFO "This is one second... ");
|
|
|
|
- {
|
|
|
|
- int clock;
|
|
|
|
- ULOOP (1 * 1000 * 1000) {
|
|
|
|
- STATUS;
|
|
|
|
- if (TIMEOUT)
|
|
|
|
- break;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- printk ("done, %s options:"
|
|
|
|
-#ifdef ARBITRATE
|
|
|
|
- " ARBITRATE"
|
|
|
|
-#endif
|
|
|
|
-#if DEBUG
|
|
|
|
- " DEBUG"
|
|
|
|
-#endif
|
|
|
|
-#ifdef FAST
|
|
|
|
- " FAST"
|
|
|
|
-#ifdef FAST32
|
|
|
|
- "32"
|
|
|
|
-#endif
|
|
|
|
-#endif
|
|
|
|
-#ifdef LINKED
|
|
|
|
- " LINKED"
|
|
|
|
-#endif
|
|
|
|
-#ifdef PARITY
|
|
|
|
- " PARITY"
|
|
|
|
-#endif
|
|
|
|
-#ifdef SEAGATE_USE_ASM
|
|
|
|
- " SEAGATE_USE_ASM"
|
|
|
|
-#endif
|
|
|
|
-#ifdef SLOW_RATE
|
|
|
|
- " SLOW_RATE"
|
|
|
|
-#endif
|
|
|
|
-#ifdef SWAPSTAT
|
|
|
|
- " SWAPSTAT"
|
|
|
|
-#endif
|
|
|
|
-#ifdef SWAPCNTDATA
|
|
|
|
- " SWAPCNTDATA"
|
|
|
|
-#endif
|
|
|
|
- "\n", tpnt->name);
|
|
|
|
- return 1;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static const char *seagate_st0x_info (struct Scsi_Host *shpnt)
|
|
|
|
-{
|
|
|
|
- static char buffer[64];
|
|
|
|
-
|
|
|
|
- snprintf(buffer, 64, "%s at irq %d, address 0x%05X",
|
|
|
|
- (controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR,
|
|
|
|
- irq, base_address);
|
|
|
|
- return buffer;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * These are our saved pointers for the outstanding command that is
|
|
|
|
- * waiting for a reconnect
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-static unsigned char current_target, current_lun;
|
|
|
|
-static unsigned char *current_cmnd, *current_data;
|
|
|
|
-static int current_nobuffs;
|
|
|
|
-static struct scatterlist *current_buffer;
|
|
|
|
-static int current_bufflen;
|
|
|
|
-
|
|
|
|
-#ifdef LINKED
|
|
|
|
-/*
|
|
|
|
- * linked_connected indicates whether or not we are currently connected to
|
|
|
|
- * linked_target, linked_lun and in an INFORMATION TRANSFER phase,
|
|
|
|
- * using linked commands.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-static int linked_connected = 0;
|
|
|
|
-static unsigned char linked_target, linked_lun;
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-static void (*done_fn) (struct scsi_cmnd *) = NULL;
|
|
|
|
-static struct scsi_cmnd *SCint = NULL;
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * These control whether or not disconnect / reconnect will be attempted,
|
|
|
|
- * or are being attempted.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-#define NO_RECONNECT 0
|
|
|
|
-#define RECONNECT_NOW 1
|
|
|
|
-#define CAN_RECONNECT 2
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * LINKED_RIGHT indicates that we are currently connected to the correct target
|
|
|
|
- * for this command, LINKED_WRONG indicates that we are connected to the wrong
|
|
|
|
- * target. Note that these imply CAN_RECONNECT and require defined(LINKED).
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-#define LINKED_RIGHT 3
|
|
|
|
-#define LINKED_WRONG 4
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * This determines if we are expecting to reconnect or not.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-static int should_reconnect = 0;
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * The seagate_reconnect_intr routine is called when a target reselects the
|
|
|
|
- * host adapter. This occurs on the interrupt triggered by the target
|
|
|
|
- * asserting SEL.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-static irqreturn_t do_seagate_reconnect_intr(int irq, void *dev_id)
|
|
|
|
-{
|
|
|
|
- unsigned long flags;
|
|
|
|
- struct Scsi_Host *dev = dev_id;
|
|
|
|
-
|
|
|
|
- spin_lock_irqsave (dev->host_lock, flags);
|
|
|
|
- seagate_reconnect_intr (irq, dev_id);
|
|
|
|
- spin_unlock_irqrestore (dev->host_lock, flags);
|
|
|
|
- return IRQ_HANDLED;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static void seagate_reconnect_intr (int irq, void *dev_id)
|
|
|
|
-{
|
|
|
|
- int temp;
|
|
|
|
- struct scsi_cmnd *SCtmp;
|
|
|
|
-
|
|
|
|
- DPRINTK (PHASE_RESELECT, "scsi%d : seagate_reconnect_intr() called\n", hostno);
|
|
|
|
-
|
|
|
|
- if (!should_reconnect)
|
|
|
|
- printk(KERN_WARNING "scsi%d: unexpected interrupt.\n", hostno);
|
|
|
|
- else {
|
|
|
|
- should_reconnect = 0;
|
|
|
|
-
|
|
|
|
- DPRINTK (PHASE_RESELECT, "scsi%d : internal_command(%d, %08x, %08x, RECONNECT_NOW\n",
|
|
|
|
- hostno, current_target, current_data, current_bufflen);
|
|
|
|
-
|
|
|
|
- temp = internal_command (current_target, current_lun, current_cmnd, current_data, current_bufflen, RECONNECT_NOW);
|
|
|
|
-
|
|
|
|
- if (msg_byte(temp) != DISCONNECT) {
|
|
|
|
- if (done_fn) {
|
|
|
|
- DPRINTK(PHASE_RESELECT, "scsi%d : done_fn(%d,%08x)", hostno, hostno, temp);
|
|
|
|
- if (!SCint)
|
|
|
|
- panic ("SCint == NULL in seagate");
|
|
|
|
- SCtmp = SCint;
|
|
|
|
- SCint = NULL;
|
|
|
|
- SCtmp->result = temp;
|
|
|
|
- done_fn(SCtmp);
|
|
|
|
- } else
|
|
|
|
- printk(KERN_ERR "done_fn() not defined.\n");
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * The seagate_st0x_queue_command() function provides a queued interface
|
|
|
|
- * to the seagate SCSI driver. Basically, it just passes control onto the
|
|
|
|
- * seagate_command() function, after fixing it so that the done_fn()
|
|
|
|
- * is set to the one passed to the function. We have to be very careful,
|
|
|
|
- * because there are some commands on some devices that do not disconnect,
|
|
|
|
- * and if we simply call the done_fn when the command is done then another
|
|
|
|
- * command is started and queue_command is called again... We end up
|
|
|
|
- * overflowing the kernel stack, and this tends not to be such a good idea.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-static int recursion_depth = 0;
|
|
|
|
-
|
|
|
|
-static int seagate_st0x_queue_command(struct scsi_cmnd * SCpnt,
|
|
|
|
- void (*done) (struct scsi_cmnd *))
|
|
|
|
-{
|
|
|
|
- int result, reconnect;
|
|
|
|
- struct scsi_cmnd *SCtmp;
|
|
|
|
-
|
|
|
|
- DANY ("seagate: que_command");
|
|
|
|
- done_fn = done;
|
|
|
|
- current_target = SCpnt->device->id;
|
|
|
|
- current_lun = SCpnt->device->lun;
|
|
|
|
- current_cmnd = SCpnt->cmnd;
|
|
|
|
- current_data = (unsigned char *) SCpnt->request_buffer;
|
|
|
|
- current_bufflen = SCpnt->request_bufflen;
|
|
|
|
- SCint = SCpnt;
|
|
|
|
- if (recursion_depth)
|
|
|
|
- return 1;
|
|
|
|
- recursion_depth++;
|
|
|
|
- do {
|
|
|
|
-#ifdef LINKED
|
|
|
|
- /*
|
|
|
|
- * Set linked command bit in control field of SCSI command.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- current_cmnd[SCpnt->cmd_len] |= 0x01;
|
|
|
|
- if (linked_connected) {
|
|
|
|
- DPRINTK (DEBUG_LINKED, "scsi%d : using linked commands, current I_T_L nexus is ", hostno);
|
|
|
|
- if (linked_target == current_target && linked_lun == current_lun)
|
|
|
|
- {
|
|
|
|
- DPRINTK(DEBUG_LINKED, "correct\n");
|
|
|
|
- reconnect = LINKED_RIGHT;
|
|
|
|
- } else {
|
|
|
|
- DPRINTK(DEBUG_LINKED, "incorrect\n");
|
|
|
|
- reconnect = LINKED_WRONG;
|
|
|
|
- }
|
|
|
|
- } else
|
|
|
|
-#endif /* LINKED */
|
|
|
|
- reconnect = CAN_RECONNECT;
|
|
|
|
-
|
|
|
|
- result = internal_command(SCint->device->id, SCint->device->lun, SCint->cmnd,
|
|
|
|
- SCint->request_buffer, SCint->request_bufflen, reconnect);
|
|
|
|
- if (msg_byte(result) == DISCONNECT)
|
|
|
|
- break;
|
|
|
|
- SCtmp = SCint;
|
|
|
|
- SCint = NULL;
|
|
|
|
- SCtmp->result = result;
|
|
|
|
- done_fn(SCtmp);
|
|
|
|
- }
|
|
|
|
- while (SCint);
|
|
|
|
- recursion_depth--;
|
|
|
|
- return 0;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static int internal_command (unsigned char target, unsigned char lun,
|
|
|
|
- const void *cmnd, void *buff, int bufflen, int reselect)
|
|
|
|
-{
|
|
|
|
- unsigned char *data = NULL;
|
|
|
|
- struct scatterlist *buffer = NULL;
|
|
|
|
- int clock, temp, nobuffs = 0, done = 0, len = 0;
|
|
|
|
-#if DEBUG
|
|
|
|
- int transfered = 0, phase = 0, newphase;
|
|
|
|
-#endif
|
|
|
|
- register unsigned char status_read;
|
|
|
|
- unsigned char tmp_data, tmp_control, status = 0, message = 0;
|
|
|
|
- unsigned transfersize = 0, underflow = 0;
|
|
|
|
-#ifdef SLOW_RATE
|
|
|
|
- int borken = (int) SCint->device->borken; /* Does the current target require
|
|
|
|
- Very Slow I/O ? */
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- incommand = 0;
|
|
|
|
- st0x_aborted = 0;
|
|
|
|
-
|
|
|
|
-#if (DEBUG & PRINT_COMMAND)
|
|
|
|
- printk("scsi%d : target = %d, command = ", hostno, target);
|
|
|
|
- __scsi_print_command((unsigned char *) cmnd);
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-#if (DEBUG & PHASE_RESELECT)
|
|
|
|
- switch (reselect) {
|
|
|
|
- case RECONNECT_NOW:
|
|
|
|
- printk("scsi%d : reconnecting\n", hostno);
|
|
|
|
- break;
|
|
|
|
-#ifdef LINKED
|
|
|
|
- case LINKED_RIGHT:
|
|
|
|
- printk("scsi%d : connected, can reconnect\n", hostno);
|
|
|
|
- break;
|
|
|
|
- case LINKED_WRONG:
|
|
|
|
- printk("scsi%d : connected to wrong target, can reconnect\n",
|
|
|
|
- hostno);
|
|
|
|
- break;
|
|
|
|
-#endif
|
|
|
|
- case CAN_RECONNECT:
|
|
|
|
- printk("scsi%d : allowed to reconnect\n", hostno);
|
|
|
|
- break;
|
|
|
|
- default:
|
|
|
|
- printk("scsi%d : not allowed to reconnect\n", hostno);
|
|
|
|
- }
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- if (target == (controller_type == SEAGATE ? 7 : 6))
|
|
|
|
- return DID_BAD_TARGET;
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * We work it differently depending on if this is is "the first time,"
|
|
|
|
- * or a reconnect. If this is a reselect phase, then SEL will
|
|
|
|
- * be asserted, and we must skip selection / arbitration phases.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- switch (reselect) {
|
|
|
|
- case RECONNECT_NOW:
|
|
|
|
- DPRINTK (PHASE_RESELECT, "scsi%d : phase RESELECT \n", hostno);
|
|
|
|
- /*
|
|
|
|
- * At this point, we should find the logical or of our ID
|
|
|
|
- * and the original target's ID on the BUS, with BSY, SEL,
|
|
|
|
- * and I/O signals asserted.
|
|
|
|
- *
|
|
|
|
- * After ARBITRATION phase is completed, only SEL, BSY,
|
|
|
|
- * and the target ID are asserted. A valid initiator ID
|
|
|
|
- * is not on the bus until IO is asserted, so we must wait
|
|
|
|
- * for that.
|
|
|
|
- */
|
|
|
|
- ULOOP (100 * 1000) {
|
|
|
|
- temp = STATUS;
|
|
|
|
- if ((temp & STAT_IO) && !(temp & STAT_BSY))
|
|
|
|
- break;
|
|
|
|
- if (TIMEOUT) {
|
|
|
|
- DPRINTK (PHASE_RESELECT, "scsi%d : RESELECT timed out while waiting for IO .\n", hostno);
|
|
|
|
- return (DID_BAD_INTR << 16);
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * After I/O is asserted by the target, we can read our ID
|
|
|
|
- * and its ID off of the BUS.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- if (!((temp = DATA) & (controller_type == SEAGATE ? 0x80 : 0x40))) {
|
|
|
|
- DPRINTK (PHASE_RESELECT, "scsi%d : detected reconnect request to different target.\n\tData bus = %d\n", hostno, temp);
|
|
|
|
- return (DID_BAD_INTR << 16);
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- if (!(temp & (1 << current_target))) {
|
|
|
|
- printk(KERN_WARNING "scsi%d : Unexpected reselect interrupt. Data bus = %d\n", hostno, temp);
|
|
|
|
- return (DID_BAD_INTR << 16);
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- buffer = current_buffer;
|
|
|
|
- cmnd = current_cmnd; /* WDE add */
|
|
|
|
- data = current_data; /* WDE add */
|
|
|
|
- len = current_bufflen; /* WDE add */
|
|
|
|
- nobuffs = current_nobuffs;
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * We have determined that we have been selected. At this
|
|
|
|
- * point, we must respond to the reselection by asserting
|
|
|
|
- * BSY ourselves
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-#if 1
|
|
|
|
- WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY);
|
|
|
|
-#else
|
|
|
|
- WRITE_CONTROL (BASE_CMD | CMD_BSY);
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * The target will drop SEL, and raise BSY, at which time
|
|
|
|
- * we must drop BSY.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- ULOOP (100 * 1000) {
|
|
|
|
- if (!(STATUS & STAT_SEL))
|
|
|
|
- break;
|
|
|
|
- if (TIMEOUT) {
|
|
|
|
- WRITE_CONTROL (BASE_CMD | CMD_INTR);
|
|
|
|
- DPRINTK (PHASE_RESELECT, "scsi%d : RESELECT timed out while waiting for SEL.\n", hostno);
|
|
|
|
- return (DID_BAD_INTR << 16);
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
- WRITE_CONTROL (BASE_CMD);
|
|
|
|
- /*
|
|
|
|
- * At this point, we have connected with the target
|
|
|
|
- * and can get on with our lives.
|
|
|
|
- */
|
|
|
|
- break;
|
|
|
|
- case CAN_RECONNECT:
|
|
|
|
-#ifdef LINKED
|
|
|
|
- /*
|
|
|
|
- * This is a bletcherous hack, just as bad as the Unix #!
|
|
|
|
- * interpreter stuff. If it turns out we are using the wrong
|
|
|
|
- * I_T_L nexus, the easiest way to deal with it is to go into
|
|
|
|
- * our INFORMATION TRANSFER PHASE code, send a ABORT
|
|
|
|
- * message on MESSAGE OUT phase, and then loop back to here.
|
|
|
|
- */
|
|
|
|
-connect_loop:
|
|
|
|
-#endif
|
|
|
|
- DPRINTK (PHASE_BUS_FREE, "scsi%d : phase = BUS FREE \n", hostno);
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * BUS FREE PHASE
|
|
|
|
- *
|
|
|
|
- * On entry, we make sure that the BUS is in a BUS FREE
|
|
|
|
- * phase, by insuring that both BSY and SEL are low for
|
|
|
|
- * at least one bus settle delay. Several reads help
|
|
|
|
- * eliminate wire glitch.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-#ifndef ARBITRATE
|
|
|
|
-#error FIXME: this is broken: we may not use jiffies here - we are under cli(). It will hardlock.
|
|
|
|
- clock = jiffies + ST0X_BUS_FREE_DELAY;
|
|
|
|
-
|
|
|
|
- while (((STATUS | STATUS | STATUS) & (STAT_BSY | STAT_SEL)) && (!st0x_aborted) && time_before (jiffies, clock))
|
|
|
|
- cpu_relax();
|
|
|
|
-
|
|
|
|
- if (time_after (jiffies, clock))
|
|
|
|
- return retcode (DID_BUS_BUSY);
|
|
|
|
- else if (st0x_aborted)
|
|
|
|
- return retcode (st0x_aborted);
|
|
|
|
-#endif
|
|
|
|
- DPRINTK (PHASE_SELECTION, "scsi%d : phase = SELECTION\n", hostno);
|
|
|
|
-
|
|
|
|
- clock = jiffies + ST0X_SELECTION_DELAY;
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * Arbitration/selection procedure :
|
|
|
|
- * 1. Disable drivers
|
|
|
|
- * 2. Write HOST adapter address bit
|
|
|
|
- * 3. Set start arbitration.
|
|
|
|
- * 4. We get either ARBITRATION COMPLETE or SELECT at this
|
|
|
|
- * point.
|
|
|
|
- * 5. OR our ID and targets on bus.
|
|
|
|
- * 6. Enable SCSI drivers and asserted SEL and ATTN
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-#ifdef ARBITRATE
|
|
|
|
- /* FIXME: verify host lock is always held here */
|
|
|
|
- WRITE_CONTROL(0);
|
|
|
|
- WRITE_DATA((controller_type == SEAGATE) ? 0x80 : 0x40);
|
|
|
|
- WRITE_CONTROL(CMD_START_ARB);
|
|
|
|
-
|
|
|
|
- ULOOP (ST0X_SELECTION_DELAY * 10000) {
|
|
|
|
- status_read = STATUS;
|
|
|
|
- if (status_read & STAT_ARB_CMPL)
|
|
|
|
- break;
|
|
|
|
- if (st0x_aborted) /* FIXME: What? We are going to do something even after abort? */
|
|
|
|
- break;
|
|
|
|
- if (TIMEOUT || (status_read & STAT_SEL)) {
|
|
|
|
- printk(KERN_WARNING "scsi%d : arbitration lost or timeout.\n", hostno);
|
|
|
|
- WRITE_CONTROL (BASE_CMD);
|
|
|
|
- return retcode (DID_NO_CONNECT);
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
- DPRINTK (PHASE_SELECTION, "scsi%d : arbitration complete\n", hostno);
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * When the SCSI device decides that we're gawking at it,
|
|
|
|
- * it will respond by asserting BUSY on the bus.
|
|
|
|
- *
|
|
|
|
- * Note : the Seagate ST-01/02 product manual says that we
|
|
|
|
- * should twiddle the DATA register before the control
|
|
|
|
- * register. However, this does not work reliably so we do
|
|
|
|
- * it the other way around.
|
|
|
|
- *
|
|
|
|
- * Probably could be a problem with arbitration too, we
|
|
|
|
- * really should try this with a SCSI protocol or logic
|
|
|
|
- * analyzer to see what is going on.
|
|
|
|
- */
|
|
|
|
- tmp_data = (unsigned char) ((1 << target) | (controller_type == SEAGATE ? 0x80 : 0x40));
|
|
|
|
- tmp_control = BASE_CMD | CMD_DRVR_ENABLE | CMD_SEL | (reselect ? CMD_ATTN : 0);
|
|
|
|
-
|
|
|
|
- /* FIXME: verify host lock is always held here */
|
|
|
|
-#ifdef OLDCNTDATASCEME
|
|
|
|
-#ifdef SWAPCNTDATA
|
|
|
|
- WRITE_CONTROL (tmp_control);
|
|
|
|
- WRITE_DATA (tmp_data);
|
|
|
|
-#else
|
|
|
|
- WRITE_DATA (tmp_data);
|
|
|
|
- WRITE_CONTROL (tmp_control);
|
|
|
|
-#endif
|
|
|
|
-#else
|
|
|
|
- tmp_control ^= CMD_BSY; /* This is guesswork. What used to be in driver */
|
|
|
|
- WRITE_CONTROL (tmp_control); /* could never work: it sent data into control */
|
|
|
|
- WRITE_DATA (tmp_data); /* register and control info into data. Hopefully */
|
|
|
|
- tmp_control ^= CMD_BSY; /* fixed, but order of first two may be wrong. */
|
|
|
|
- WRITE_CONTROL (tmp_control); /* -- pavel@ucw.cz */
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- ULOOP (250 * 1000) {
|
|
|
|
- if (st0x_aborted) {
|
|
|
|
- /*
|
|
|
|
- * If we have been aborted, and we have a
|
|
|
|
- * command in progress, IE the target
|
|
|
|
- * still has BSY asserted, then we will
|
|
|
|
- * reset the bus, and notify the midlevel
|
|
|
|
- * driver to expect sense.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- WRITE_CONTROL (BASE_CMD);
|
|
|
|
- if (STATUS & STAT_BSY) {
|
|
|
|
- printk(KERN_WARNING "scsi%d : BST asserted after we've been aborted.\n", hostno);
|
|
|
|
- seagate_st0x_bus_reset(NULL);
|
|
|
|
- return retcode (DID_RESET);
|
|
|
|
- }
|
|
|
|
- return retcode (st0x_aborted);
|
|
|
|
- }
|
|
|
|
- if (STATUS & STAT_BSY)
|
|
|
|
- break;
|
|
|
|
- if (TIMEOUT) {
|
|
|
|
- DPRINTK (PHASE_SELECTION, "scsi%d : NO CONNECT with target %d, stat = %x \n", hostno, target, STATUS);
|
|
|
|
- return retcode (DID_NO_CONNECT);
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- /* Establish current pointers. Take into account scatter / gather */
|
|
|
|
-
|
|
|
|
- if ((nobuffs = SCint->use_sg)) {
|
|
|
|
-#if (DEBUG & DEBUG_SG)
|
|
|
|
- {
|
|
|
|
- int i;
|
|
|
|
- printk("scsi%d : scatter gather requested, using %d buffers.\n", hostno, nobuffs);
|
|
|
|
- for (i = 0; i < nobuffs; ++i)
|
|
|
|
- printk("scsi%d : buffer %d address = %p length = %d\n",
|
|
|
|
- hostno, i,
|
|
|
|
- sg_virt(&buffer[i]),
|
|
|
|
- buffer[i].length);
|
|
|
|
- }
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- buffer = (struct scatterlist *) SCint->request_buffer;
|
|
|
|
- len = buffer->length;
|
|
|
|
- data = sg_virt(buffer);
|
|
|
|
- } else {
|
|
|
|
- DPRINTK (DEBUG_SG, "scsi%d : scatter gather not requested.\n", hostno);
|
|
|
|
- buffer = NULL;
|
|
|
|
- len = SCint->request_bufflen;
|
|
|
|
- data = (unsigned char *) SCint->request_buffer;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- DPRINTK (PHASE_DATAIN | PHASE_DATAOUT, "scsi%d : len = %d\n",
|
|
|
|
- hostno, len);
|
|
|
|
-
|
|
|
|
- break;
|
|
|
|
-#ifdef LINKED
|
|
|
|
- case LINKED_RIGHT:
|
|
|
|
- break;
|
|
|
|
- case LINKED_WRONG:
|
|
|
|
- break;
|
|
|
|
-#endif
|
|
|
|
- } /* end of switch(reselect) */
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * There are several conditions under which we wish to send a message :
|
|
|
|
- * 1. When we are allowing disconnect / reconnect, and need to
|
|
|
|
- * establish the I_T_L nexus via an IDENTIFY with the DiscPriv bit
|
|
|
|
- * set.
|
|
|
|
- *
|
|
|
|
- * 2. When we are doing linked commands, are have the wrong I_T_L
|
|
|
|
- * nexus established and want to send an ABORT message.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- /* GCC does not like an ifdef inside a macro, so do it the hard way. */
|
|
|
|
-#ifdef LINKED
|
|
|
|
- WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | (((reselect == CAN_RECONNECT)|| (reselect == LINKED_WRONG))? CMD_ATTN : 0));
|
|
|
|
-#else
|
|
|
|
- WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | (((reselect == CAN_RECONNECT))? CMD_ATTN : 0));
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * INFORMATION TRANSFER PHASE
|
|
|
|
- *
|
|
|
|
- * The nasty looking read / write inline assembler loops we use for
|
|
|
|
- * DATAIN and DATAOUT phases are approximately 4-5 times as fast as
|
|
|
|
- * the 'C' versions - since we're moving 1024 bytes of data, this
|
|
|
|
- * really adds up.
|
|
|
|
- *
|
|
|
|
- * SJT: The nasty-looking assembler is gone, so it's slower.
|
|
|
|
- *
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- DPRINTK (PHASE_ETC, "scsi%d : phase = INFORMATION TRANSFER\n", hostno);
|
|
|
|
-
|
|
|
|
- incommand = 1;
|
|
|
|
- transfersize = SCint->transfersize;
|
|
|
|
- underflow = SCint->underflow;
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * Now, we poll the device for status information,
|
|
|
|
- * and handle any requests it makes. Note that since we are unsure
|
|
|
|
- * of how much data will be flowing across the system, etc and
|
|
|
|
- * cannot make reasonable timeouts, that we will instead have the
|
|
|
|
- * midlevel driver handle any timeouts that occur in this phase.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- while (((status_read = STATUS) & STAT_BSY) && !st0x_aborted && !done) {
|
|
|
|
-#ifdef PARITY
|
|
|
|
- if (status_read & STAT_PARITY) {
|
|
|
|
- printk(KERN_ERR "scsi%d : got parity error\n", hostno);
|
|
|
|
- st0x_aborted = DID_PARITY;
|
|
|
|
- }
|
|
|
|
-#endif
|
|
|
|
- if (status_read & STAT_REQ) {
|
|
|
|
-#if ((DEBUG & PHASE_ETC) == PHASE_ETC)
|
|
|
|
- if ((newphase = (status_read & REQ_MASK)) != phase) {
|
|
|
|
- phase = newphase;
|
|
|
|
- switch (phase) {
|
|
|
|
- case REQ_DATAOUT:
|
|
|
|
- printk ("scsi%d : phase = DATA OUT\n", hostno);
|
|
|
|
- break;
|
|
|
|
- case REQ_DATAIN:
|
|
|
|
- printk ("scsi%d : phase = DATA IN\n", hostno);
|
|
|
|
- break;
|
|
|
|
- case REQ_CMDOUT:
|
|
|
|
- printk
|
|
|
|
- ("scsi%d : phase = COMMAND OUT\n", hostno);
|
|
|
|
- break;
|
|
|
|
- case REQ_STATIN:
|
|
|
|
- printk ("scsi%d : phase = STATUS IN\n", hostno);
|
|
|
|
- break;
|
|
|
|
- case REQ_MSGOUT:
|
|
|
|
- printk
|
|
|
|
- ("scsi%d : phase = MESSAGE OUT\n", hostno);
|
|
|
|
- break;
|
|
|
|
- case REQ_MSGIN:
|
|
|
|
- printk ("scsi%d : phase = MESSAGE IN\n", hostno);
|
|
|
|
- break;
|
|
|
|
- default:
|
|
|
|
- printk ("scsi%d : phase = UNKNOWN\n", hostno);
|
|
|
|
- st0x_aborted = DID_ERROR;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-#endif
|
|
|
|
- switch (status_read & REQ_MASK) {
|
|
|
|
- case REQ_DATAOUT:
|
|
|
|
- /*
|
|
|
|
- * If we are in fast mode, then we simply splat
|
|
|
|
- * the data out in word-sized chunks as fast as
|
|
|
|
- * we can.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- if (!len) {
|
|
|
|
-#if 0
|
|
|
|
- printk("scsi%d: underflow to target %d lun %d \n", hostno, target, lun);
|
|
|
|
- st0x_aborted = DID_ERROR;
|
|
|
|
- fast = 0;
|
|
|
|
-#endif
|
|
|
|
- break;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- if (fast && transfersize
|
|
|
|
- && !(len % transfersize)
|
|
|
|
- && (len >= transfersize)
|
|
|
|
-#ifdef FAST32
|
|
|
|
- && !(transfersize % 4)
|
|
|
|
-#endif
|
|
|
|
- ) {
|
|
|
|
- DPRINTK (DEBUG_FAST,
|
|
|
|
- "scsi%d : FAST transfer, underflow = %d, transfersize = %d\n"
|
|
|
|
- " len = %d, data = %08x\n",
|
|
|
|
- hostno, SCint->underflow,
|
|
|
|
- SCint->transfersize, len,
|
|
|
|
- data);
|
|
|
|
-
|
|
|
|
- /* SJT: Start. Fast Write */
|
|
|
|
-#ifdef SEAGATE_USE_ASM
|
|
|
|
- __asm__ ("cld\n\t"
|
|
|
|
-#ifdef FAST32
|
|
|
|
- "shr $2, %%ecx\n\t"
|
|
|
|
- "1:\t"
|
|
|
|
- "lodsl\n\t"
|
|
|
|
- "movl %%eax, (%%edi)\n\t"
|
|
|
|
-#else
|
|
|
|
- "1:\t"
|
|
|
|
- "lodsb\n\t"
|
|
|
|
- "movb %%al, (%%edi)\n\t"
|
|
|
|
-#endif
|
|
|
|
- "loop 1b;"
|
|
|
|
- /* output */ :
|
|
|
|
- /* input */ :"D" (st0x_dr),
|
|
|
|
- "S"
|
|
|
|
- (data),
|
|
|
|
- "c" (SCint->transfersize)
|
|
|
|
-/* clobbered */
|
|
|
|
- : "eax", "ecx",
|
|
|
|
- "esi");
|
|
|
|
-#else /* SEAGATE_USE_ASM */
|
|
|
|
- memcpy_toio(st0x_dr, data, transfersize);
|
|
|
|
-#endif /* SEAGATE_USE_ASM */
|
|
|
|
-/* SJT: End */
|
|
|
|
- len -= transfersize;
|
|
|
|
- data += transfersize;
|
|
|
|
- DPRINTK (DEBUG_FAST, "scsi%d : FAST transfer complete len = %d data = %08x\n", hostno, len, data);
|
|
|
|
- } else {
|
|
|
|
- /*
|
|
|
|
- * We loop as long as we are in a
|
|
|
|
- * data out phase, there is data to
|
|
|
|
- * send, and BSY is still active.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-/* SJT: Start. Slow Write. */
|
|
|
|
-#ifdef SEAGATE_USE_ASM
|
|
|
|
-
|
|
|
|
- int __dummy_1, __dummy_2;
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * We loop as long as we are in a data out phase, there is data to send,
|
|
|
|
- * and BSY is still active.
|
|
|
|
- */
|
|
|
|
-/* Local variables : len = ecx , data = esi,
|
|
|
|
- st0x_cr_sr = ebx, st0x_dr = edi
|
|
|
|
-*/
|
|
|
|
- __asm__ (
|
|
|
|
- /* Test for any data here at all. */
|
|
|
|
- "orl %%ecx, %%ecx\n\t"
|
|
|
|
- "jz 2f\n\t" "cld\n\t"
|
|
|
|
-/* "movl st0x_cr_sr, %%ebx\n\t" */
|
|
|
|
-/* "movl st0x_dr, %%edi\n\t" */
|
|
|
|
- "1:\t"
|
|
|
|
- "movb (%%ebx), %%al\n\t"
|
|
|
|
- /* Test for BSY */
|
|
|
|
- "test $1, %%al\n\t"
|
|
|
|
- "jz 2f\n\t"
|
|
|
|
- /* Test for data out phase - STATUS & REQ_MASK should be
|
|
|
|
- REQ_DATAOUT, which is 0. */
|
|
|
|
- "test $0xe, %%al\n\t"
|
|
|
|
- "jnz 2f\n\t"
|
|
|
|
- /* Test for REQ */
|
|
|
|
- "test $0x10, %%al\n\t"
|
|
|
|
- "jz 1b\n\t"
|
|
|
|
- "lodsb\n\t"
|
|
|
|
- "movb %%al, (%%edi)\n\t"
|
|
|
|
- "loop 1b\n\t" "2:\n"
|
|
|
|
- /* output */ :"=S" (data), "=c" (len),
|
|
|
|
- "=b"
|
|
|
|
- (__dummy_1),
|
|
|
|
- "=D" (__dummy_2)
|
|
|
|
-/* input */
|
|
|
|
- : "0" (data), "1" (len),
|
|
|
|
- "2" (st0x_cr_sr),
|
|
|
|
- "3" (st0x_dr)
|
|
|
|
-/* clobbered */
|
|
|
|
- : "eax");
|
|
|
|
-#else /* SEAGATE_USE_ASM */
|
|
|
|
- while (len) {
|
|
|
|
- unsigned char stat;
|
|
|
|
-
|
|
|
|
- stat = STATUS;
|
|
|
|
- if (!(stat & STAT_BSY)
|
|
|
|
- || ((stat & REQ_MASK) !=
|
|
|
|
- REQ_DATAOUT))
|
|
|
|
- break;
|
|
|
|
- if (stat & STAT_REQ) {
|
|
|
|
- WRITE_DATA (*data++);
|
|
|
|
- --len;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-#endif /* SEAGATE_USE_ASM */
|
|
|
|
-/* SJT: End. */
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- if (!len && nobuffs) {
|
|
|
|
- --nobuffs;
|
|
|
|
- ++buffer;
|
|
|
|
- len = buffer->length;
|
|
|
|
- data = sg_virt(buffer);
|
|
|
|
- DPRINTK (DEBUG_SG,
|
|
|
|
- "scsi%d : next scatter-gather buffer len = %d address = %08x\n",
|
|
|
|
- hostno, len, data);
|
|
|
|
- }
|
|
|
|
- break;
|
|
|
|
-
|
|
|
|
- case REQ_DATAIN:
|
|
|
|
-#ifdef SLOW_RATE
|
|
|
|
- if (borken) {
|
|
|
|
-#if (DEBUG & (PHASE_DATAIN))
|
|
|
|
- transfered += len;
|
|
|
|
-#endif
|
|
|
|
- for (; len && (STATUS & (REQ_MASK | STAT_REQ)) == (REQ_DATAIN | STAT_REQ); --len) {
|
|
|
|
- *data++ = DATA;
|
|
|
|
- borken_wait();
|
|
|
|
- }
|
|
|
|
-#if (DEBUG & (PHASE_DATAIN))
|
|
|
|
- transfered -= len;
|
|
|
|
-#endif
|
|
|
|
- } else
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- if (fast && transfersize
|
|
|
|
- && !(len % transfersize)
|
|
|
|
- && (len >= transfersize)
|
|
|
|
-#ifdef FAST32
|
|
|
|
- && !(transfersize % 4)
|
|
|
|
-#endif
|
|
|
|
- ) {
|
|
|
|
- DPRINTK (DEBUG_FAST,
|
|
|
|
- "scsi%d : FAST transfer, underflow = %d, transfersize = %d\n"
|
|
|
|
- " len = %d, data = %08x\n",
|
|
|
|
- hostno, SCint->underflow,
|
|
|
|
- SCint->transfersize, len,
|
|
|
|
- data);
|
|
|
|
-
|
|
|
|
-/* SJT: Start. Fast Read */
|
|
|
|
-#ifdef SEAGATE_USE_ASM
|
|
|
|
- __asm__ ("cld\n\t"
|
|
|
|
-#ifdef FAST32
|
|
|
|
- "shr $2, %%ecx\n\t"
|
|
|
|
- "1:\t"
|
|
|
|
- "movl (%%esi), %%eax\n\t"
|
|
|
|
- "stosl\n\t"
|
|
|
|
-#else
|
|
|
|
- "1:\t"
|
|
|
|
- "movb (%%esi), %%al\n\t"
|
|
|
|
- "stosb\n\t"
|
|
|
|
-#endif
|
|
|
|
- "loop 1b\n\t"
|
|
|
|
- /* output */ :
|
|
|
|
- /* input */ :"S" (st0x_dr),
|
|
|
|
- "D"
|
|
|
|
- (data),
|
|
|
|
- "c" (SCint->transfersize)
|
|
|
|
-/* clobbered */
|
|
|
|
- : "eax", "ecx",
|
|
|
|
- "edi");
|
|
|
|
-#else /* SEAGATE_USE_ASM */
|
|
|
|
- memcpy_fromio(data, st0x_dr, len);
|
|
|
|
-#endif /* SEAGATE_USE_ASM */
|
|
|
|
-/* SJT: End */
|
|
|
|
- len -= transfersize;
|
|
|
|
- data += transfersize;
|
|
|
|
-#if (DEBUG & PHASE_DATAIN)
|
|
|
|
- printk ("scsi%d: transfered += %d\n", hostno, transfersize);
|
|
|
|
- transfered += transfersize;
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- DPRINTK (DEBUG_FAST, "scsi%d : FAST transfer complete len = %d data = %08x\n", hostno, len, data);
|
|
|
|
- } else {
|
|
|
|
-
|
|
|
|
-#if (DEBUG & PHASE_DATAIN)
|
|
|
|
- printk ("scsi%d: transfered += %d\n", hostno, len);
|
|
|
|
- transfered += len; /* Assume we'll transfer it all, then
|
|
|
|
- subtract what we *didn't* transfer */
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * We loop as long as we are in a data in phase, there is room to read,
|
|
|
|
- * and BSY is still active
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-/* SJT: Start. */
|
|
|
|
-#ifdef SEAGATE_USE_ASM
|
|
|
|
-
|
|
|
|
- int __dummy_3, __dummy_4;
|
|
|
|
-
|
|
|
|
-/* Dummy clobbering variables for the new gcc-2.95 */
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * We loop as long as we are in a data in phase, there is room to read,
|
|
|
|
- * and BSY is still active
|
|
|
|
- */
|
|
|
|
- /* Local variables : ecx = len, edi = data
|
|
|
|
- esi = st0x_cr_sr, ebx = st0x_dr */
|
|
|
|
- __asm__ (
|
|
|
|
- /* Test for room to read */
|
|
|
|
- "orl %%ecx, %%ecx\n\t"
|
|
|
|
- "jz 2f\n\t" "cld\n\t"
|
|
|
|
-/* "movl st0x_cr_sr, %%esi\n\t" */
|
|
|
|
-/* "movl st0x_dr, %%ebx\n\t" */
|
|
|
|
- "1:\t"
|
|
|
|
- "movb (%%esi), %%al\n\t"
|
|
|
|
- /* Test for BSY */
|
|
|
|
- "test $1, %%al\n\t"
|
|
|
|
- "jz 2f\n\t"
|
|
|
|
- /* Test for data in phase - STATUS & REQ_MASK should be REQ_DATAIN,
|
|
|
|
- = STAT_IO, which is 4. */
|
|
|
|
- "movb $0xe, %%ah\n\t"
|
|
|
|
- "andb %%al, %%ah\n\t"
|
|
|
|
- "cmpb $0x04, %%ah\n\t"
|
|
|
|
- "jne 2f\n\t"
|
|
|
|
- /* Test for REQ */
|
|
|
|
- "test $0x10, %%al\n\t"
|
|
|
|
- "jz 1b\n\t"
|
|
|
|
- "movb (%%ebx), %%al\n\t"
|
|
|
|
- "stosb\n\t"
|
|
|
|
- "loop 1b\n\t" "2:\n"
|
|
|
|
- /* output */ :"=D" (data), "=c" (len),
|
|
|
|
- "=S"
|
|
|
|
- (__dummy_3),
|
|
|
|
- "=b" (__dummy_4)
|
|
|
|
-/* input */
|
|
|
|
- : "0" (data), "1" (len),
|
|
|
|
- "2" (st0x_cr_sr),
|
|
|
|
- "3" (st0x_dr)
|
|
|
|
-/* clobbered */
|
|
|
|
- : "eax");
|
|
|
|
-#else /* SEAGATE_USE_ASM */
|
|
|
|
- while (len) {
|
|
|
|
- unsigned char stat;
|
|
|
|
-
|
|
|
|
- stat = STATUS;
|
|
|
|
- if (!(stat & STAT_BSY)
|
|
|
|
- || ((stat & REQ_MASK) !=
|
|
|
|
- REQ_DATAIN))
|
|
|
|
- break;
|
|
|
|
- if (stat & STAT_REQ) {
|
|
|
|
- *data++ = DATA;
|
|
|
|
- --len;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-#endif /* SEAGATE_USE_ASM */
|
|
|
|
-/* SJT: End. */
|
|
|
|
-#if (DEBUG & PHASE_DATAIN)
|
|
|
|
- printk ("scsi%d: transfered -= %d\n", hostno, len);
|
|
|
|
- transfered -= len; /* Since we assumed all of Len got *
|
|
|
|
- transfered, correct our mistake */
|
|
|
|
-#endif
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- if (!len && nobuffs) {
|
|
|
|
- --nobuffs;
|
|
|
|
- ++buffer;
|
|
|
|
- len = buffer->length;
|
|
|
|
- data = sg_virt(buffer);
|
|
|
|
- DPRINTK (DEBUG_SG, "scsi%d : next scatter-gather buffer len = %d address = %08x\n", hostno, len, data);
|
|
|
|
- }
|
|
|
|
- break;
|
|
|
|
-
|
|
|
|
- case REQ_CMDOUT:
|
|
|
|
- while (((status_read = STATUS) & STAT_BSY) &&
|
|
|
|
- ((status_read & REQ_MASK) == REQ_CMDOUT))
|
|
|
|
- if (status_read & STAT_REQ) {
|
|
|
|
- WRITE_DATA (*(const unsigned char *) cmnd);
|
|
|
|
- cmnd = 1 + (const unsigned char *)cmnd;
|
|
|
|
-#ifdef SLOW_RATE
|
|
|
|
- if (borken)
|
|
|
|
- borken_wait ();
|
|
|
|
-#endif
|
|
|
|
- }
|
|
|
|
- break;
|
|
|
|
-
|
|
|
|
- case REQ_STATIN:
|
|
|
|
- status = DATA;
|
|
|
|
- break;
|
|
|
|
-
|
|
|
|
- case REQ_MSGOUT:
|
|
|
|
- /*
|
|
|
|
- * We can only have sent a MSG OUT if we
|
|
|
|
- * requested to do this by raising ATTN.
|
|
|
|
- * So, we must drop ATTN.
|
|
|
|
- */
|
|
|
|
- WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE);
|
|
|
|
- /*
|
|
|
|
- * If we are reconnecting, then we must
|
|
|
|
- * send an IDENTIFY message in response
|
|
|
|
- * to MSGOUT.
|
|
|
|
- */
|
|
|
|
- switch (reselect) {
|
|
|
|
- case CAN_RECONNECT:
|
|
|
|
- WRITE_DATA (IDENTIFY (1, lun));
|
|
|
|
- DPRINTK (PHASE_RESELECT | PHASE_MSGOUT, "scsi%d : sent IDENTIFY message.\n", hostno);
|
|
|
|
- break;
|
|
|
|
-#ifdef LINKED
|
|
|
|
- case LINKED_WRONG:
|
|
|
|
- WRITE_DATA (ABORT);
|
|
|
|
- linked_connected = 0;
|
|
|
|
- reselect = CAN_RECONNECT;
|
|
|
|
- goto connect_loop;
|
|
|
|
- DPRINTK (PHASE_MSGOUT | DEBUG_LINKED, "scsi%d : sent ABORT message to cancel incorrect I_T_L nexus.\n", hostno);
|
|
|
|
-#endif /* LINKED */
|
|
|
|
- DPRINTK (DEBUG_LINKED, "correct\n");
|
|
|
|
- default:
|
|
|
|
- WRITE_DATA (NOP);
|
|
|
|
- printk("scsi%d : target %d requested MSGOUT, sent NOP message.\n", hostno, target);
|
|
|
|
- }
|
|
|
|
- break;
|
|
|
|
-
|
|
|
|
- case REQ_MSGIN:
|
|
|
|
- switch (message = DATA) {
|
|
|
|
- case DISCONNECT:
|
|
|
|
- DANY("seagate: deciding to disconnect\n");
|
|
|
|
- should_reconnect = 1;
|
|
|
|
- current_data = data; /* WDE add */
|
|
|
|
- current_buffer = buffer;
|
|
|
|
- current_bufflen = len; /* WDE add */
|
|
|
|
- current_nobuffs = nobuffs;
|
|
|
|
-#ifdef LINKED
|
|
|
|
- linked_connected = 0;
|
|
|
|
-#endif
|
|
|
|
- done = 1;
|
|
|
|
- DPRINTK ((PHASE_RESELECT | PHASE_MSGIN), "scsi%d : disconnected.\n", hostno);
|
|
|
|
- break;
|
|
|
|
-
|
|
|
|
-#ifdef LINKED
|
|
|
|
- case LINKED_CMD_COMPLETE:
|
|
|
|
- case LINKED_FLG_CMD_COMPLETE:
|
|
|
|
-#endif
|
|
|
|
- case COMMAND_COMPLETE:
|
|
|
|
- /*
|
|
|
|
- * Note : we should check for underflow here.
|
|
|
|
- */
|
|
|
|
- DPRINTK(PHASE_MSGIN, "scsi%d : command complete.\n", hostno);
|
|
|
|
- done = 1;
|
|
|
|
- break;
|
|
|
|
- case ABORT:
|
|
|
|
- DPRINTK(PHASE_MSGIN, "scsi%d : abort message.\n", hostno);
|
|
|
|
- done = 1;
|
|
|
|
- break;
|
|
|
|
- case SAVE_POINTERS:
|
|
|
|
- current_buffer = buffer;
|
|
|
|
- current_bufflen = len; /* WDE add */
|
|
|
|
- current_data = data; /* WDE mod */
|
|
|
|
- current_nobuffs = nobuffs;
|
|
|
|
- DPRINTK (PHASE_MSGIN, "scsi%d : pointers saved.\n", hostno);
|
|
|
|
- break;
|
|
|
|
- case RESTORE_POINTERS:
|
|
|
|
- buffer = current_buffer;
|
|
|
|
- cmnd = current_cmnd;
|
|
|
|
- data = current_data; /* WDE mod */
|
|
|
|
- len = current_bufflen;
|
|
|
|
- nobuffs = current_nobuffs;
|
|
|
|
- DPRINTK(PHASE_MSGIN, "scsi%d : pointers restored.\n", hostno);
|
|
|
|
- break;
|
|
|
|
- default:
|
|
|
|
-
|
|
|
|
- /*
|
|
|
|
- * IDENTIFY distinguishes itself
|
|
|
|
- * from the other messages by
|
|
|
|
- * setting the high bit.
|
|
|
|
- *
|
|
|
|
- * Note : we need to handle at
|
|
|
|
- * least one outstanding command
|
|
|
|
- * per LUN, and need to hash the
|
|
|
|
- * SCSI command for that I_T_L
|
|
|
|
- * nexus based on the known ID
|
|
|
|
- * (at this point) and LUN.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- if (message & 0x80) {
|
|
|
|
- DPRINTK (PHASE_MSGIN, "scsi%d : IDENTIFY message received from id %d, lun %d.\n", hostno, target, message & 7);
|
|
|
|
- } else {
|
|
|
|
- /*
|
|
|
|
- * We should go into a
|
|
|
|
- * MESSAGE OUT phase, and
|
|
|
|
- * send a MESSAGE_REJECT
|
|
|
|
- * if we run into a message
|
|
|
|
- * that we don't like. The
|
|
|
|
- * seagate driver needs
|
|
|
|
- * some serious
|
|
|
|
- * restructuring first
|
|
|
|
- * though.
|
|
|
|
- */
|
|
|
|
- DPRINTK (PHASE_MSGIN, "scsi%d : unknown message %d from target %d.\n", hostno, message, target);
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
- break;
|
|
|
|
- default:
|
|
|
|
- printk(KERN_ERR "scsi%d : unknown phase.\n", hostno);
|
|
|
|
- st0x_aborted = DID_ERROR;
|
|
|
|
- } /* end of switch (status_read & REQ_MASK) */
|
|
|
|
-#ifdef SLOW_RATE
|
|
|
|
- /*
|
|
|
|
- * I really don't care to deal with borken devices in
|
|
|
|
- * each single byte transfer case (ie, message in,
|
|
|
|
- * message out, status), so I'll do the wait here if
|
|
|
|
- * necessary.
|
|
|
|
- */
|
|
|
|
- if(borken)
|
|
|
|
- borken_wait();
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- } /* if(status_read & STAT_REQ) ends */
|
|
|
|
- } /* while(((status_read = STATUS)...) ends */
|
|
|
|
-
|
|
|
|
- DPRINTK(PHASE_DATAIN | PHASE_DATAOUT | PHASE_EXIT, "scsi%d : Transfered %d bytes\n", hostno, transfered);
|
|
|
|
-
|
|
|
|
-#if (DEBUG & PHASE_EXIT)
|
|
|
|
-#if 0 /* Doesn't work for scatter/gather */
|
|
|
|
- printk("Buffer : \n");
|
|
|
|
- for(i = 0; i < 20; ++i)
|
|
|
|
- printk("%02x ", ((unsigned char *) data)[i]); /* WDE mod */
|
|
|
|
- printk("\n");
|
|
|
|
-#endif
|
|
|
|
- printk("scsi%d : status = ", hostno);
|
|
|
|
- scsi_print_status(status);
|
|
|
|
- printk(" message = %02x\n", message);
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
- /* We shouldn't reach this until *after* BSY has been deasserted */
|
|
|
|
-
|
|
|
|
-#ifdef LINKED
|
|
|
|
- else
|
|
|
|
- {
|
|
|
|
- /*
|
|
|
|
- * Fix the message byte so that unsuspecting high level drivers
|
|
|
|
- * don't puke when they see a LINKED COMMAND message in place of
|
|
|
|
- * the COMMAND COMPLETE they may be expecting. Shouldn't be
|
|
|
|
- * necessary, but it's better to be on the safe side.
|
|
|
|
- *
|
|
|
|
- * A non LINKED* message byte will indicate that the command
|
|
|
|
- * completed, and we are now disconnected.
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
- switch (message) {
|
|
|
|
- case LINKED_CMD_COMPLETE:
|
|
|
|
- case LINKED_FLG_CMD_COMPLETE:
|
|
|
|
- message = COMMAND_COMPLETE;
|
|
|
|
- linked_target = current_target;
|
|
|
|
- linked_lun = current_lun;
|
|
|
|
- linked_connected = 1;
|
|
|
|
- DPRINTK (DEBUG_LINKED, "scsi%d : keeping I_T_L nexus established for linked command.\n", hostno);
|
|
|
|
- /* We also will need to adjust status to accommodate intermediate
|
|
|
|
- conditions. */
|
|
|
|
- if ((status == INTERMEDIATE_GOOD) || (status == INTERMEDIATE_C_GOOD))
|
|
|
|
- status = GOOD;
|
|
|
|
- break;
|
|
|
|
- /*
|
|
|
|
- * We should also handle what are "normal" termination
|
|
|
|
- * messages here (ABORT, BUS_DEVICE_RESET?, and
|
|
|
|
- * COMMAND_COMPLETE individually, and flake if things
|
|
|
|
- * aren't right.
|
|
|
|
- */
|
|
|
|
- default:
|
|
|
|
- DPRINTK (DEBUG_LINKED, "scsi%d : closing I_T_L nexus.\n", hostno);
|
|
|
|
- linked_connected = 0;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-#endif /* LINKED */
|
|
|
|
-
|
|
|
|
- if (should_reconnect) {
|
|
|
|
- DPRINTK (PHASE_RESELECT, "scsi%d : exiting seagate_st0x_queue_command() with reconnect enabled.\n", hostno);
|
|
|
|
- WRITE_CONTROL (BASE_CMD | CMD_INTR);
|
|
|
|
- } else
|
|
|
|
- WRITE_CONTROL (BASE_CMD);
|
|
|
|
-
|
|
|
|
- return retcode (st0x_aborted);
|
|
|
|
-} /* end of internal_command */
|
|
|
|
-
|
|
|
|
-static int seagate_st0x_abort(struct scsi_cmnd * SCpnt)
|
|
|
|
-{
|
|
|
|
- st0x_aborted = DID_ABORT;
|
|
|
|
- return SUCCESS;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-#undef ULOOP
|
|
|
|
-#undef TIMEOUT
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * the seagate_st0x_reset function resets the SCSI bus
|
|
|
|
- *
|
|
|
|
- * May be called with SCpnt = NULL
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-static int seagate_st0x_bus_reset(struct scsi_cmnd * SCpnt)
|
|
|
|
-{
|
|
|
|
- /* No timeouts - this command is going to fail because it was reset. */
|
|
|
|
- DANY ("scsi%d: Reseting bus... ", hostno);
|
|
|
|
-
|
|
|
|
- /* assert RESET signal on SCSI bus. */
|
|
|
|
- WRITE_CONTROL (BASE_CMD | CMD_RST);
|
|
|
|
-
|
|
|
|
- mdelay (20);
|
|
|
|
-
|
|
|
|
- WRITE_CONTROL (BASE_CMD);
|
|
|
|
- st0x_aborted = DID_RESET;
|
|
|
|
-
|
|
|
|
- DANY ("done.\n");
|
|
|
|
- return SUCCESS;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static int seagate_st0x_release(struct Scsi_Host *shost)
|
|
|
|
-{
|
|
|
|
- if (shost->irq)
|
|
|
|
- free_irq(shost->irq, shost);
|
|
|
|
- release_region(shost->io_port, shost->n_io_port);
|
|
|
|
- return 0;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static struct scsi_host_template driver_template = {
|
|
|
|
- .detect = seagate_st0x_detect,
|
|
|
|
- .release = seagate_st0x_release,
|
|
|
|
- .info = seagate_st0x_info,
|
|
|
|
- .queuecommand = seagate_st0x_queue_command,
|
|
|
|
- .eh_abort_handler = seagate_st0x_abort,
|
|
|
|
- .eh_bus_reset_handler = seagate_st0x_bus_reset,
|
|
|
|
- .can_queue = 1,
|
|
|
|
- .this_id = 7,
|
|
|
|
- .sg_tablesize = SG_ALL,
|
|
|
|
- .cmd_per_lun = 1,
|
|
|
|
- .use_clustering = DISABLE_CLUSTERING,
|
|
|
|
-};
|
|
|
|
-#include "scsi_module.c"
|
|
|