2 * linux/drivers/scsi/wd7000.c
4 * Copyright (C) 1992 Thomas Wuensche
5 * closely related to the aha1542 driver from Tommy Thorn
6 * ( as close as different hardware allows on a lowlevel-driver :-) )
8 * Revised (and renamed) by John Boyd <boyd@cis.ohio-state.edu> to
9 * accommodate Eric Youngdale's modifications to scsi.c. Nov 1992.
11 * Additional changes to support scatter/gather. Dec. 1992. tw/jb
13 * No longer tries to reset SCSI bus at boot (it wasn't working anyway).
14 * Rewritten to support multiple host adapters.
15 * Miscellaneous cleanup.
16 * So far, still doesn't do reset or abort correctly, since I have no idea
17 * how to do them with this board (8^(. Jan 1994 jb
19 * This driver now supports both of the two standard configurations (per
20 * the 3.36 Owner's Manual, my latest reference) by the same method as
21 * before; namely, by looking for a BIOS signature. Thus, the location of
22 * the BIOS signature determines the board configuration. Until I have
23 * time to do something more flexible, users should stick to one of the
26 * Standard configuration for single-adapter systems:
28 * - I/O base address 350h
31 * Standard configuration for a second adapter in a system:
33 * - I/O base address 330h
37 * Anyone who can recompile the kernel is welcome to add others as need
38 * arises, but unpredictable results may occur if there are conflicts.
39 * In any event, if there are multiple adapters in a system, they MUST
40 * use different I/O bases, IRQ levels, and DMA channels, since they will be
41 * indistinguishable (and in direct conflict) otherwise.
43 * As a point of information, the NO_OP command toggles the CMD_RDY bit
44 * of the status port, and this fact could be used as a test for the I/O
45 * base address (or more generally, board detection). There is an interrupt
46 * status port, so IRQ probing could also be done. I suppose the full
47 * DMA diagnostic could be used to detect the DMA channel being used. I
48 * haven't done any of this, though, because I think there's too much of
49 * a chance that such explorations could be destructive, if some other
50 * board's resources are used inadvertently. So, call me a wimp, but I
51 * don't want to try it. The only kind of exploration I trust is memory
52 * exploration, since it's more certain that reading memory won't be
55 * More to my liking would be a LILO boot command line specification, such
56 * as is used by the aha152x driver (and possibly others). I'll look into
57 * it, as I have time...
59 * I get mail occasionally from people who either are using or are
60 * considering using a WD7000 with Linux. There is a variety of
61 * nomenclature describing WD7000's. To the best of my knowledge, the
62 * following is a brief summary (from an old WD doc - I don't work for
63 * them or anything like that):
65 * WD7000-FASST2: This is a WD7000 board with the real-mode SST ROM BIOS
66 * installed. Last I heard, the BIOS was actually done by Columbia
67 * Data Products. The BIOS is only used by this driver (and thus
68 * by Linux) to identify the board; none of it can be executed under
71 * WD7000-ASC: This is the original adapter board, with or without BIOS.
72 * The board uses a WD33C93 or WD33C93A SBIC, which in turn is
73 * controlled by an onboard Z80 processor. The board interface
74 * visible to the host CPU is defined effectively by the Z80's
75 * firmware, and it is this firmware's revision level that is
76 * determined and reported by this driver. (The version of the
77 * on-board BIOS is of no interest whatsoever.) The host CPU has
78 * no access to the SBIC; hence the fact that it is a WD33C93 is
79 * also of no interest to this driver.
83 * WD7000-EX: These are newer versions of the WD7000-ASC. The -ASC is
84 * largely built from discrete components; these boards use more
85 * integration. The -AX is an ISA bus board (like the -ASC),
86 * the -MX is an MCA (i.e., PS/2) bus board), and the -EX is an
89 * At the time of my documentation, the -?X boards were "future" products,
90 * and were not yet available. However, I vaguely recall that Thomas
91 * Wuensche had an -AX, so I believe at least it is supported by this
92 * driver. I have no personal knowledge of either -MX or -EX boards.
94 * P.S. Just recently, I've discovered (directly from WD and Future
95 * Domain) that all but the WD7000-EX have been out of production for
96 * two years now. FD has production rights to the 7000-EX, and are
97 * producing it under a new name, and with a new BIOS. If anyone has
98 * one of the FD boards, it would be nice to come up with a signature
103 * Revisions by Miroslav Zagorac <zaga@fly.cc.fer.hr>
107 * Enhancement for wd7000_detect function has been made, so you don't have
108 * to enter BIOS ROM address in initialisation data (see struct Config).
109 * We cannot detect IRQ, DMA and I/O base address for now, so we have to
110 * enter them as arguments while wd_7000 is detected. If someone has IRQ,
111 * DMA or I/O base address set to some other value, he can enter them in
112 * configuration without any problem. Also I wrote a function wd7000_setup,
113 * so now you can enter WD-7000 definition as kernel arguments,
116 * append="wd7000=IRQ,DMA,IO"
118 * PS: If card BIOS ROM is disabled, function wd7000_detect now will recognize
119 * adapter, unlike the old one. Anyway, BIOS ROM from WD7000 adapter is
120 * useless for Linux. B^)
125 * Autodetecting of I/O base address from wd7000_detect function is removed,
126 * some little bugs removed, etc...
128 * Thanks to Roger Scott for driver debugging.
132 * Added support for /proc file system (/proc/scsi/wd7000/[0...] files).
133 * Now, driver can handle hard disks with capacity >1GB.
137 * Added support for BUS_ON and BUS_OFF parameters in config line.
138 * Miscellaneous cleanup.
142 * WD7000 driver now work on kernels >= 2.1.x
145 * 12/31/2001 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
147 * use host->host_lock, not io_request_lock, cleanups
149 * 2002/10/04 - Alan Cox <alan@redhat.com>
151 * Use dev_id for interrupts, kill __FUNCTION__ pasting
152 * Add a lock for the scb pool, clean up all other cli/sti usage stuff
153 * Use the adapter lock for the other places we had the cli's
155 * 2002/10/06 - Alan Cox <alan@redhat.com>
157 * Switch to new style error handling
158 * Clean up delay to udelay, and yielding sleeps
159 * Make host reset actually reset the card
160 * Make everything static
162 * 2003/02/12 - Christoph Hellwig <hch@infradead.org>
164 * Cleaned up host template defintion
165 * Removed now obsolete wd7000.h
168 #include <linux/delay.h>
169 #include <linux/module.h>
170 #include <linux/interrupt.h>
171 #include <linux/kernel.h>
172 #include <linux/types.h>
173 #include <linux/string.h>
174 #include <linux/slab.h>
175 #include <linux/spinlock.h>
176 #include <linux/ioport.h>
177 #include <linux/proc_fs.h>
178 #include <linux/blkdev.h>
179 #include <linux/init.h>
180 #include <linux/stat.h>
182 #include <asm/system.h>
188 #include <scsi/scsicam.h>
191 #define ANY2SCSI_INLINE /* undef this to use old macros */
192 #undef WD7000_DEBUG /* general debug */
194 #define dprintk printk
196 #define dprintk(format,args...)
200 * Mailbox structure sizes.
201 * I prefer to keep the number of ICMBs much larger than the number of
202 * OGMBs. OGMBs are used very quickly by the driver to start one or
203 * more commands, while ICMBs are used by the host adapter per command.
209 * Scb's are shared by all active adapters. So, if they all become busy,
210 * callers may be made to wait in alloc_scbs for them to free. That can
211 * be avoided by setting MAX_SCBS to NUM_CONFIG * WD7000_Q. If you'd
212 * rather conserve memory, use a smaller number (> 0, of course) - things
213 * will should still work OK.
218 * In this version, sg_tablesize now defaults to WD7000_SG, and will
219 * be set to SG_NONE for older boards. This is the reverse of the
220 * previous default, and was changed so that the driver-level
221 * Scsi_Host_Template would reflect the driver's support for scatter/
224 * Also, it has been reported that boards at Revision 6 support scatter/
225 * gather, so the new definition of an "older" board has been changed
233 * WD7000-specific mailbox structure
236 typedef volatile struct mailbox {
238 unchar scbptr[3]; /* SCSI-style - MSB first (big endian) */
242 * This structure should contain all per-adapter global data. I.e., any
243 * new global per-adapter data should put in here.
245 typedef struct adapter {
246 struct Scsi_Host *sh; /* Pointer to Scsi_Host structure */
247 int iobase; /* This adapter's I/O base address */
248 int irq; /* This adapter's IRQ level */
249 int dma; /* This adapter's DMA channel */
250 int int_counter; /* This adapter's interrupt counter */
251 int bus_on; /* This adapter's BUS_ON time */
252 int bus_off; /* This adapter's BUS_OFF time */
253 struct { /* This adapter's mailboxes */
254 Mailbox ogmb[OGMB_CNT]; /* Outgoing mailboxes */
255 Mailbox icmb[ICMB_CNT]; /* Incoming mailboxes */
257 int next_ogmb; /* to reduce contention at mailboxes */
258 unchar control; /* shadows CONTROL port value */
259 unchar rev1, rev2; /* filled in by wd7000_revision */
263 * (linear) base address for ROM BIOS
265 static const long wd7000_biosaddr[] = {
266 0xc0000, 0xc2000, 0xc4000, 0xc6000, 0xc8000, 0xca000, 0xcc000, 0xce000,
267 0xd0000, 0xd2000, 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0xde000
269 #define NUM_ADDRS (sizeof(wd7000_biosaddr)/sizeof(long))
271 static const unsigned short wd7000_iobase[] = {
272 0x0300, 0x0308, 0x0310, 0x0318, 0x0320, 0x0328, 0x0330, 0x0338,
273 0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370, 0x0378,
274 0x0380, 0x0388, 0x0390, 0x0398, 0x03a0, 0x03a8, 0x03b0, 0x03b8,
275 0x03c0, 0x03c8, 0x03d0, 0x03d8, 0x03e0, 0x03e8, 0x03f0, 0x03f8
277 #define NUM_IOPORTS (sizeof(wd7000_iobase)/sizeof(unsigned short))
279 static const short wd7000_irq[] = { 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 };
280 #define NUM_IRQS (sizeof(wd7000_irq)/sizeof(short))
282 static const short wd7000_dma[] = { 5, 6, 7 };
283 #define NUM_DMAS (sizeof(wd7000_dma)/sizeof(short))
286 * The following is set up by wd7000_detect, and used thereafter for
287 * proc and other global ookups
291 static struct Scsi_Host *wd7000_host[UNITS];
293 #define BUS_ON 64 /* x 125ns = 8000ns (BIOS default) */
294 #define BUS_OFF 15 /* x 125ns = 1875ns (BIOS default) */
297 * Standard Adapter Configurations - used by wd7000_detect
300 short irq; /* IRQ level */
301 short dma; /* DMA channel */
302 unsigned iobase; /* I/O base address */
303 short bus_on; /* Time that WD7000 spends on the AT-bus when */
304 /* transferring data. BIOS default is 8000ns. */
305 short bus_off; /* Time that WD7000 spends OFF THE BUS after */
306 /* while it is transferring data. */
307 /* BIOS default is 1875ns */
311 * Add here your configuration...
313 static Config configs[] = {
314 {15, 6, 0x350, BUS_ON, BUS_OFF}, /* defaults for single adapter */
315 {11, 5, 0x320, BUS_ON, BUS_OFF}, /* defaults for second adapter */
316 {7, 6, 0x350, BUS_ON, BUS_OFF}, /* My configuration (Zaga) */
317 {-1, -1, 0x0, BUS_ON, BUS_OFF} /* Empty slot */
319 #define NUM_CONFIGS (sizeof(configs)/sizeof(Config))
322 * The following list defines strings to look for in the BIOS that identify
323 * it as the WD7000-FASST2 SST BIOS. I suspect that something should be
324 * added for the Future Domain version.
326 typedef struct signature {
327 const char *sig; /* String to look for */
328 unsigned long ofs; /* offset from BIOS base address */
329 unsigned len; /* length of string */
332 static const Signature signatures[] = {
333 {"SSTBIOS", 0x0000d, 7} /* "SSTBIOS" @ offset 0x0000d */
335 #define NUM_SIGNATURES (sizeof(signatures)/sizeof(Signature))
339 * I/O Port Offsets and Bit Definitions
340 * 4 addresses are used. Those not defined here are reserved.
342 #define ASC_STAT 0 /* Status, Read */
343 #define ASC_COMMAND 0 /* Command, Write */
344 #define ASC_INTR_STAT 1 /* Interrupt Status, Read */
345 #define ASC_INTR_ACK 1 /* Acknowledge, Write */
346 #define ASC_CONTROL 2 /* Control, Write */
351 #define INT_IM 0x80 /* Interrupt Image Flag */
352 #define CMD_RDY 0x40 /* Command Port Ready */
353 #define CMD_REJ 0x20 /* Command Port Byte Rejected */
354 #define ASC_INIT 0x10 /* ASC Initialized Flag */
355 #define ASC_STATMASK 0xf0 /* The lower 4 Bytes are reserved */
360 * Unfortunately, I have no idea how to properly use some of these commands,
361 * as the OEM manual does not make it clear. I have not been able to use
362 * enable/disable unsolicited interrupts or the reset commands with any
363 * discernible effect whatsoever. I think they may be related to certain
364 * ICB commands, but again, the OEM manual doesn't make that clear.
366 #define NO_OP 0 /* NO-OP toggles CMD_RDY bit in ASC_STAT */
367 #define INITIALIZATION 1 /* initialization (10 bytes) */
368 #define DISABLE_UNS_INTR 2 /* disable unsolicited interrupts */
369 #define ENABLE_UNS_INTR 3 /* enable unsolicited interrupts */
370 #define INTR_ON_FREE_OGMB 4 /* interrupt on free OGMB */
371 #define SOFT_RESET 5 /* SCSI bus soft reset */
372 #define HARD_RESET_ACK 6 /* SCSI bus hard reset acknowledge */
373 #define START_OGMB 0x80 /* start command in OGMB (n) */
374 #define SCAN_OGMBS 0xc0 /* start multiple commands, signature (n) */
375 /* where (n) = lower 6 bits */
377 * For INITIALIZATION:
379 typedef struct initCmd {
380 unchar op; /* command opcode (= 1) */
381 unchar ID; /* Adapter's SCSI ID */
382 unchar bus_on; /* Bus on time, x 125ns (see below) */
383 unchar bus_off; /* Bus off time, "" "" */
384 unchar rsvd; /* Reserved */
385 unchar mailboxes[3]; /* Address of Mailboxes, MSB first */
386 unchar ogmbs; /* Number of outgoing MBs, max 64, 0,1 = 1 */
387 unchar icmbs; /* Number of incoming MBs, "" "" */
391 * Interrupt Status Port - also returns diagnostic codes at ASC reset
393 * if msb is zero, the lower bits are diagnostic status
395 * 01 No diagnostic error occurred
398 * 04 SBIC register read/write failed
399 * 05 Initialization D-FF failed
400 * 06 Host IRQ D-FF failed
401 * 07 ROM checksum error
402 * Interrupt status (bitwise):
403 * 10NNNNNN outgoing mailbox NNNNNN is free
404 * 11NNNNNN incoming mailbox NNNNNN needs service
406 #define MB_INTR 0xC0 /* Mailbox Service possible/required */
407 #define IMB_INTR 0x40 /* 1 Incoming / 0 Outgoing */
408 #define MB_MASK 0x3f /* mask for mailbox number */
413 #define INT_EN 0x08 /* Interrupt Enable */
414 #define DMA_EN 0x04 /* DMA Enable */
415 #define SCSI_RES 0x02 /* SCSI Reset */
416 #define ASC_RES 0x01 /* ASC Reset */
419 * Driver data structures:
420 * - mb and scbs are required for interfacing with the host adapter.
421 * An SCB has extra fields not visible to the adapter; mb's
422 * _cannot_ do this, since the adapter assumes they are contiguous in
423 * memory, 4 bytes each, with ICMBs following OGMBs, and uses this fact
425 * - An icb is for host-only (non-SCSI) commands. ICBs are 16 bytes each;
426 * the additional bytes are used only by the driver.
427 * - For now, a pool of SCBs are kept in global storage by this driver,
428 * and are allocated and freed as needed.
430 * The 7000-FASST2 marks OGMBs empty as soon as it has _started_ a command,
431 * not when it has finished. Since the SCB must be around for completion,
432 * problems arise when SCBs correspond to OGMBs, which may be reallocated
433 * earlier (or delayed unnecessarily until a command completes).
434 * Mailboxes are used as transient data structures, simply for
435 * carrying SCB addresses to/from the 7000-FASST2.
437 * Note also since SCBs are not "permanently" associated with mailboxes,
438 * there is no need to keep a global list of Scsi_Cmnd pointers indexed
439 * by OGMB. Again, SCBs reference their Scsi_Cmnds directly, so mailbox
440 * indices need not be involved.
444 * WD7000-specific scatter/gather element structure
448 unchar ptr[3]; /* Also SCSI-style - MSB first */
451 typedef struct scb { /* Command Control Block 5.4.1 */
452 unchar op; /* Command Control Block Operation Code */
453 unchar idlun; /* op=0,2:Target Id, op=1:Initiator Id */
454 /* Outbound data transfer, length is checked */
455 /* Inbound data transfer, length is checked */
456 /* Logical Unit Number */
457 unchar cdb[12]; /* SCSI Command Block */
458 volatile unchar status; /* SCSI Return Status */
459 volatile unchar vue; /* Vendor Unique Error Code */
460 unchar maxlen[3]; /* Maximum Data Transfer Length */
461 unchar dataptr[3]; /* SCSI Data Block Pointer */
462 unchar linkptr[3]; /* Next Command Link Pointer */
463 unchar direc; /* Transfer Direction */
464 unchar reserved2[6]; /* SCSI Command Descriptor Block */
465 /* end of hardware SCB */
466 Scsi_Cmnd *SCpnt; /* Scsi_Cmnd using this SCB */
467 Sgb sgb[WD7000_SG]; /* Scatter/gather list for this SCB */
468 Adapter *host; /* host adapter */
469 struct scb *next; /* for lists of scbs */
473 * This driver is written to allow host-only commands to be executed.
474 * These use a 16-byte block called an ICB. The format is extended by the
475 * driver to 18 bytes, to support the status returned in the ICMB and
476 * an execution phase code.
478 * There are other formats besides these; these are the ones I've tried
479 * to use. Formats for some of the defined ICB opcodes are not defined
480 * (notably, get/set unsolicited interrupt status) in my copy of the OEM
481 * manual, and others are ambiguous/hard to follow.
483 #define ICB_OP_MASK 0x80 /* distinguishes scbs from icbs */
484 #define ICB_OP_OPEN_RBUF 0x80 /* open receive buffer */
485 #define ICB_OP_RECV_CMD 0x81 /* receive command from initiator */
486 #define ICB_OP_RECV_DATA 0x82 /* receive data from initiator */
487 #define ICB_OP_RECV_SDATA 0x83 /* receive data with status from init. */
488 #define ICB_OP_SEND_DATA 0x84 /* send data with status to initiator */
489 #define ICB_OP_SEND_STAT 0x86 /* send command status to initiator */
490 /* 0x87 is reserved */
491 #define ICB_OP_READ_INIT 0x88 /* read initialization bytes */
492 #define ICB_OP_READ_ID 0x89 /* read adapter's SCSI ID */
493 #define ICB_OP_SET_UMASK 0x8A /* set unsolicited interrupt mask */
494 #define ICB_OP_GET_UMASK 0x8B /* read unsolicited interrupt mask */
495 #define ICB_OP_GET_REVISION 0x8C /* read firmware revision level */
496 #define ICB_OP_DIAGNOSTICS 0x8D /* execute diagnostics */
497 #define ICB_OP_SET_EPARMS 0x8E /* set execution parameters */
498 #define ICB_OP_GET_EPARMS 0x8F /* read execution parameters */
500 typedef struct icbRecvCmd {
502 unchar IDlun; /* Initiator SCSI ID/lun */
503 unchar len[3]; /* command buffer length */
504 unchar ptr[3]; /* command buffer address */
505 unchar rsvd[7]; /* reserved */
506 volatile unchar vue; /* vendor-unique error code */
507 volatile unchar status; /* returned (icmb) status */
508 volatile unchar phase; /* used by interrupt handler */
511 typedef struct icbSendStat {
513 unchar IDlun; /* Target SCSI ID/lun */
514 unchar stat; /* (outgoing) completion status byte 1 */
515 unchar rsvd[12]; /* reserved */
516 volatile unchar vue; /* vendor-unique error code */
517 volatile unchar status; /* returned (icmb) status */
518 volatile unchar phase; /* used by interrupt handler */
521 typedef struct icbRevLvl {
523 volatile unchar primary; /* primary revision level (returned) */
524 volatile unchar secondary; /* secondary revision level (returned) */
525 unchar rsvd[12]; /* reserved */
526 volatile unchar vue; /* vendor-unique error code */
527 volatile unchar status; /* returned (icmb) status */
528 volatile unchar phase; /* used by interrupt handler */
531 typedef struct icbUnsMask { /* I'm totally guessing here */
533 volatile unchar mask[14]; /* mask bits */
535 unchar rsvd[12]; /* reserved */
537 volatile unchar vue; /* vendor-unique error code */
538 volatile unchar status; /* returned (icmb) status */
539 volatile unchar phase; /* used by interrupt handler */
542 typedef struct icbDiag {
544 unchar type; /* diagnostics type code (0-3) */
545 unchar len[3]; /* buffer length */
546 unchar ptr[3]; /* buffer address */
547 unchar rsvd[7]; /* reserved */
548 volatile unchar vue; /* vendor-unique error code */
549 volatile unchar status; /* returned (icmb) status */
550 volatile unchar phase; /* used by interrupt handler */
553 #define ICB_DIAG_POWERUP 0 /* Power-up diags only */
554 #define ICB_DIAG_WALKING 1 /* walking 1's pattern */
555 #define ICB_DIAG_DMA 2 /* DMA - system memory diags */
556 #define ICB_DIAG_FULL 3 /* do both 1 & 2 */
558 typedef struct icbParms {
560 unchar rsvd1; /* reserved */
561 unchar len[3]; /* parms buffer length */
562 unchar ptr[3]; /* parms buffer address */
563 unchar idx[2]; /* index (MSB-LSB) */
564 unchar rsvd2[5]; /* reserved */
565 volatile unchar vue; /* vendor-unique error code */
566 volatile unchar status; /* returned (icmb) status */
567 volatile unchar phase; /* used by interrupt handler */
570 typedef struct icbAny {
572 unchar data[14]; /* format-specific data */
573 volatile unchar vue; /* vendor-unique error code */
574 volatile unchar status; /* returned (icmb) status */
575 volatile unchar phase; /* used by interrupt handler */
579 unchar op; /* ICB opcode */
580 IcbRecvCmd recv_cmd; /* format for receive command */
581 IcbSendStat send_stat; /* format for send status */
582 IcbRevLvl rev_lvl; /* format for get revision level */
583 IcbDiag diag; /* format for execute diagnostics */
584 IcbParms eparms; /* format for get/set exec parms */
585 IcbAny icb; /* generic format */
591 MODULE_PARM(wd7000, "s");
595 * Driver SCB structure pool.
597 * The SCBs declared here are shared by all host adapters; hence, this
598 * structure is not part of the Adapter structure.
600 static Scb scbs[MAX_SCBS];
601 static Scb *scbfree; /* free list */
602 static int freescbs = MAX_SCBS; /* free list counter */
603 static spinlock_t scbpool_lock; /* guards the scb free list and count */
606 * END of data/declarations - code follows.
608 static void __init setup_error(char *mesg, int *ints)
611 printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x\" -> %s\n", ints[1], ints[2], ints[3], mesg);
612 else if (ints[0] == 4)
613 printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], mesg);
615 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);
620 * Note: You can now set these options from the kernel's "command line".
623 * wd7000=<IRQ>,<DMA>,<IO>[,<BUS_ON>[,<BUS_OFF>]]
625 * , where BUS_ON and BUS_OFF are in nanoseconds. BIOS default values
626 * are 8000ns for BUS_ON and 1875ns for BUS_OFF.
630 * will configure the driver for a WD-7000 controller
631 * using IRQ 15 with a DMA channel 6, at IO base address 0x350.
633 static int __init wd7000_setup(char *str)
635 static short wd7000_card_num; /* .bss will zero this */
639 (void) get_options(str, ARRAY_SIZE(ints), ints);
641 if (wd7000_card_num >= NUM_CONFIGS) {
642 printk(KERN_ERR "%s: Too many \"wd7000=\" configurations in " "command line!\n", __FUNCTION__);
646 if ((ints[0] < 3) || (ints[0] > 5)) {
647 printk(KERN_ERR "%s: Error in command line! " "Usage: wd7000=<IRQ>,<DMA>,IO>[,<BUS_ON>" "[,<BUS_OFF>]]\n", __FUNCTION__);
649 for (i = 0; i < NUM_IRQS; i++)
650 if (ints[1] == wd7000_irq[i])
654 setup_error("invalid IRQ.", ints);
657 configs[wd7000_card_num].irq = ints[1];
659 for (i = 0; i < NUM_DMAS; i++)
660 if (ints[2] == wd7000_dma[i])
664 setup_error("invalid DMA channel.", ints);
667 configs[wd7000_card_num].dma = ints[2];
669 for (i = 0; i < NUM_IOPORTS; i++)
670 if (ints[3] == wd7000_iobase[i])
673 if (i == NUM_IOPORTS) {
674 setup_error("invalid I/O base address.", ints);
677 configs[wd7000_card_num].iobase = ints[3];
680 if ((ints[4] < 500) || (ints[4] > 31875)) {
681 setup_error("BUS_ON value is out of range (500" " to 31875 nanoseconds)!", ints);
682 configs[wd7000_card_num].bus_on = BUS_ON;
684 configs[wd7000_card_num].bus_on = ints[4] / 125;
686 configs[wd7000_card_num].bus_on = BUS_ON;
689 if ((ints[5] < 500) || (ints[5] > 31875)) {
690 setup_error("BUS_OFF value is out of range (500" " to 31875 nanoseconds)!", ints);
691 configs[wd7000_card_num].bus_off = BUS_OFF;
693 configs[wd7000_card_num].bus_off = ints[5] / 125;
695 configs[wd7000_card_num].bus_off = BUS_OFF;
697 if (wd7000_card_num) {
698 for (i = 0; i < (wd7000_card_num - 1); i++) {
701 for (; j < wd7000_card_num; j++)
702 if (configs[i].irq == configs[j].irq) {
703 setup_error("duplicated IRQ!", ints);
706 if (configs[i].dma == configs[j].dma) {
707 setup_error("duplicated DMA " "channel!", ints);
710 if (configs[i].iobase == configs[j].iobase) {
711 setup_error("duplicated I/O " "base address!", ints);
717 dprintk(KERN_DEBUG "wd7000_setup: IRQ=%d, DMA=%d, I/O=0x%x, "
718 "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);
725 __setup("wd7000=", wd7000_setup);
727 #ifdef ANY2SCSI_INLINE
729 * Since they're used a lot, I've redone the following from the macros
730 * formerly in wd7000.h, hopefully to speed them up by getting rid of
731 * all the shifting (it may not matter; GCC might have done as well anyway).
733 * xany2scsi and xscsi2int were not being used, and are no longer defined.
734 * (They were simply 4-byte versions of these routines).
736 typedef union { /* let's cheat... */
738 unchar u[sizeof(int)]; /* the sizeof(int) makes it more portable */
742 static inline void any2scsi(unchar * scsi, int any)
744 *scsi++ = ((i_u) any).u[2];
745 *scsi++ = ((i_u) any).u[1];
746 *scsi++ = ((i_u) any).u[0];
750 static inline int scsi2int(unchar * scsi)
754 result.i = 0; /* clears unused bytes */
755 result.u[2] = *scsi++;
756 result.u[1] = *scsi++;
757 result.u[0] = *scsi++;
763 * These are the old ones - I've just moved them here...
766 #define any2scsi(up, p) (up)[0] = (((unsigned long) (p)) >> 16); \
767 (up)[1] = ((unsigned long) (p)) >> 8; \
768 (up)[2] = ((unsigned long) (p));
771 #define scsi2int(up) ( (((unsigned long) *(up)) << 16) + \
772 (((unsigned long) (up)[1]) << 8) + \
773 ((unsigned long) (up)[2]) )
777 static inline void wd7000_enable_intr(Adapter * host)
779 host->control |= INT_EN;
780 outb(host->control, host->iobase + ASC_CONTROL);
784 static inline void wd7000_enable_dma(Adapter * host)
787 host->control |= DMA_EN;
788 outb(host->control, host->iobase + ASC_CONTROL);
790 flags = claim_dma_lock();
791 set_dma_mode(host->dma, DMA_MODE_CASCADE);
792 enable_dma(host->dma);
793 release_dma_lock(flags);
798 #define WAITnexttimeout 200 /* 2 seconds */
800 static inline short WAIT(unsigned port, unsigned mask, unsigned allof, unsigned noneof)
802 register unsigned WAITbits;
803 register unsigned long WAITtimeout = jiffies + WAITnexttimeout;
805 while (time_before_eq(jiffies, WAITtimeout)) {
806 WAITbits = inb(port) & mask;
808 if (((WAITbits & allof) == allof) && ((WAITbits & noneof) == 0))
816 static inline int command_out(Adapter * host, unchar * cmd, int len)
818 if (!WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
821 outb(*cmd, host->iobase + ASC_COMMAND);
822 WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0);
823 } while (inb(host->iobase + ASC_STAT) & CMD_REJ);
831 printk(KERN_WARNING "wd7000 command_out: WAIT failed(%d)\n", len + 1);
838 * This version of alloc_scbs is in preparation for supporting multiple
839 * commands per lun and command chaining, by queueing pending commands.
840 * We will need to allocate Scbs in blocks since they will wait to be
841 * executed so there is the possibility of deadlock otherwise.
842 * Also, to keep larger requests from being starved by smaller requests,
843 * we limit access to this routine with an internal busy flag, so that
844 * the satisfiability of a request is not dependent on the size of the
847 static inline Scb *alloc_scbs(struct Scsi_Host *host, int needed)
849 register Scb *scb, *p = NULL;
851 register unsigned long timeout = jiffies + WAITnexttimeout;
852 register unsigned long now;
856 return (NULL); /* sanity check */
858 spin_unlock_irq(host->host_lock);
861 while (freescbs < needed) {
862 timeout = jiffies + WAITnexttimeout;
864 /* FIXME: can we actually just yield here ?? */
865 for (now = jiffies; now == jiffies;)
866 cpu_relax(); /* wait a jiffy */
867 } while (freescbs < needed && time_before_eq(jiffies, timeout));
869 * If we get here with enough free Scbs, we can take them.
870 * Otherwise, we timed out and didn't get enough.
872 if (freescbs < needed) {
873 printk(KERN_ERR "wd7000: can't get enough free SCBs.\n");
878 /* Take the lock, then check we didnt get beaten, if so try again */
879 spin_lock_irqsave(&scbpool_lock, flags);
880 if (freescbs < needed) {
881 spin_unlock_irqrestore(&scbpool_lock, flags);
887 for (i = 0; i < needed; i++) {
893 spin_unlock_irqrestore(&scbpool_lock, flags);
895 spin_lock_irq(host->host_lock);
900 static inline void free_scb(Scb * scb)
904 spin_lock_irqsave(&scbpool_lock, flags);
906 memset(scb, 0, sizeof(Scb));
911 spin_unlock_irqrestore(&scbpool_lock, flags);
915 static inline void init_scbs(void)
919 spin_lock_init(&scbpool_lock);
921 /* This is only ever called before the SCB pool is active */
923 scbfree = &(scbs[0]);
924 memset(scbs, 0, sizeof(scbs));
925 for (i = 0; i < MAX_SCBS - 1; i++) {
926 scbs[i].next = &(scbs[i + 1]);
927 scbs[i].SCpnt = NULL;
929 scbs[MAX_SCBS - 1].next = NULL;
930 scbs[MAX_SCBS - 1].SCpnt = NULL;
934 static int mail_out(Adapter * host, Scb * scbptr)
936 * Note: this can also be used for ICBs; just cast to the parm type.
939 register int i, ogmb;
942 Mailbox *ogmbs = host->mb.ogmb;
943 int *next_ogmb = &(host->next_ogmb);
945 dprintk("wd7000_mail_out: 0x%06lx", (long) scbptr);
947 /* We first look for a free outgoing mailbox */
948 spin_lock_irqsave(host->sh->host_lock, flags);
950 for (i = 0; i < OGMB_CNT; i++) {
951 if (ogmbs[ogmb].status == 0) {
952 dprintk(" using OGMB 0x%x", ogmb);
953 ogmbs[ogmb].status = 1;
954 any2scsi((unchar *) ogmbs[ogmb].scbptr, (int) scbptr);
956 *next_ogmb = (ogmb + 1) % OGMB_CNT;
959 ogmb = (ogmb + 1) % OGMB_CNT;
961 spin_unlock_irqrestore(host->sh->host_lock, flags);
963 dprintk(", scb is 0x%06lx", (long) scbptr);
967 * Alternatively, we might issue the "interrupt on free OGMB",
968 * and sleep, but it must be ensured that it isn't the init
969 * task running. Instead, this version assumes that the caller
970 * will be persistent, and try again. Since it's the adapter
971 * that marks OGMB's free, waiting even with interrupts off
972 * should work, since they are freed very quickly in most cases.
974 dprintk(", no free OGMBs.\n");
978 wd7000_enable_intr(host);
980 start_ogmb = START_OGMB | ogmb;
981 command_out(host, &start_ogmb, 1);
983 dprintk(", awaiting interrupt.\n");
989 static int make_code(unsigned hosterr, unsigned scsierr)
992 int in_error = hosterr;
995 switch ((hosterr >> 8) & 0xff) {
996 case 0: /* Reserved */
999 case 1: /* Command Complete, no errors */
1002 case 2: /* Command complete, error logged in scb status (scsierr) */
1005 case 4: /* Command failed to complete - timeout */
1006 hosterr = DID_TIME_OUT;
1008 case 5: /* Command terminated; Bus reset by external device */
1009 hosterr = DID_RESET;
1011 case 6: /* Unexpected Command Received w/ host as target */
1012 hosterr = DID_BAD_TARGET;
1014 case 80: /* Unexpected Reselection */
1015 case 81: /* Unexpected Selection */
1016 hosterr = DID_BAD_INTR;
1018 case 82: /* Abort Command Message */
1019 hosterr = DID_ABORT;
1021 case 83: /* SCSI Bus Software Reset */
1022 case 84: /* SCSI Bus Hardware Reset */
1023 hosterr = DID_RESET;
1025 default: /* Reserved */
1026 hosterr = DID_ERROR;
1029 if (scsierr || hosterr)
1030 dprintk("\nSCSI command error: SCSI 0x%02x host 0x%04x return %d\n", scsierr, in_error, hosterr);
1032 return (scsierr | (hosterr << 16));
1035 #define wd7000_intr_ack(host) outb (0, host->iobase + ASC_INTR_ACK)
1037 static void wd7000_intr_handle(int irq, void *dev_id, struct pt_regs *regs)
1039 register int flag, icmb, errstatus, icmb_status;
1040 register int host_error, scsi_error;
1041 register Scb *scb; /* for SCSI commands */
1042 register IcbAny *icb; /* for host commands */
1043 register Scsi_Cmnd *SCpnt;
1044 Adapter *host = (Adapter *) dev_id;
1045 Mailbox *icmbs = host->mb.icmb;
1047 host->int_counter++;
1049 dprintk("wd7000_intr_handle: irq = %d, host = 0x%06lx\n", irq, (long) host);
1051 flag = inb(host->iobase + ASC_INTR_STAT);
1053 dprintk("wd7000_intr_handle: intr stat = 0x%02x\n", flag);
1055 if (!(inb(host->iobase + ASC_STAT) & INT_IM)) {
1056 /* NB: these are _very_ possible if IRQ 15 is being used, since
1057 * it's the "garbage collector" on the 2nd 8259 PIC. Specifically,
1058 * any interrupt signal into the 8259 which can't be identified
1059 * comes out as 7 from the 8259, which is 15 to the host. Thus, it
1060 * is a good thing the WD7000 has an interrupt status port, so we
1061 * can sort these out. Otherwise, electrical noise and other such
1062 * problems would be indistinguishable from valid interrupts...
1064 dprintk("wd7000_intr_handle: phantom interrupt...\n");
1065 wd7000_intr_ack(host);
1069 if (flag & MB_INTR) {
1070 /* The interrupt is for a mailbox */
1071 if (!(flag & IMB_INTR)) {
1072 dprintk("wd7000_intr_handle: free outgoing mailbox\n");
1074 * If sleep_on() and the "interrupt on free OGMB" command are
1075 * used in mail_out(), wake_up() should correspondingly be called
1076 * here. For now, we don't need to do anything special.
1078 wd7000_intr_ack(host);
1081 /* The interrupt is for an incoming mailbox */
1082 icmb = flag & MB_MASK;
1083 icmb_status = icmbs[icmb].status;
1084 if (icmb_status & 0x80) { /* unsolicited - result in ICMB */
1085 dprintk("wd7000_intr_handle: unsolicited interrupt 0x%02x\n", icmb_status);
1086 wd7000_intr_ack(host);
1089 /* Aaaargh! (Zaga) */
1090 scb = isa_bus_to_virt(scsi2int((unchar *) icmbs[icmb].scbptr));
1091 icmbs[icmb].status = 0;
1092 if (!(scb->op & ICB_OP_MASK)) { /* an SCB is done */
1094 if (--(SCpnt->SCp.phase) <= 0) { /* all scbs are done */
1095 host_error = scb->vue | (icmb_status << 8);
1096 scsi_error = scb->status;
1097 errstatus = make_code(host_error, scsi_error);
1098 SCpnt->result = errstatus;
1102 SCpnt->scsi_done(SCpnt);
1104 } else { /* an ICB is done */
1105 icb = (IcbAny *) scb;
1106 icb->status = icmb_status;
1109 } /* incoming mailbox */
1112 wd7000_intr_ack(host);
1114 dprintk("wd7000_intr_handle: return from interrupt handler\n");
1117 static irqreturn_t do_wd7000_intr_handle(int irq, void *dev_id,
1118 struct pt_regs *regs)
1120 unsigned long flags;
1121 struct Scsi_Host *host = dev_id;
1123 spin_lock_irqsave(host->host_lock, flags);
1124 wd7000_intr_handle(irq, dev_id, regs);
1125 spin_unlock_irqrestore(host->host_lock, flags);
1130 static int wd7000_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
1134 register unchar *cdb = (unchar *) SCpnt->cmnd;
1135 register unchar idlun;
1136 register short cdblen;
1137 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1139 cdblen = SCpnt->cmd_len;
1140 idlun = ((SCpnt->device->id << 5) & 0xe0) | (SCpnt->device->lun & 7);
1141 SCpnt->scsi_done = done;
1142 SCpnt->SCp.phase = 1;
1143 scb = alloc_scbs(SCpnt->device->host, 1);
1145 memcpy(scb->cdb, cdb, cdblen);
1146 scb->direc = 0x40; /* Disable direction check */
1148 scb->SCpnt = SCpnt; /* so we can find stuff later */
1149 SCpnt->host_scribble = (unchar *) scb;
1152 if (SCpnt->use_sg) {
1153 struct scatterlist *sg = (struct scatterlist *) SCpnt->request_buffer;
1156 if (SCpnt->device->host->sg_tablesize == SG_NONE) {
1157 panic("wd7000_queuecommand: scatter/gather not supported.\n");
1159 dprintk("Using scatter/gather with %d elements.\n", SCpnt->use_sg);
1163 any2scsi(scb->dataptr, (int) sgb);
1164 any2scsi(scb->maxlen, SCpnt->use_sg * sizeof(Sgb));
1166 for (i = 0; i < SCpnt->use_sg; i++) {
1167 any2scsi(sgb[i].ptr, isa_page_to_bus(sg[i].page) + sg[i].offset);
1168 any2scsi(sgb[i].len, sg[i].length);
1172 any2scsi(scb->dataptr, isa_virt_to_bus(SCpnt->request_buffer));
1173 any2scsi(scb->maxlen, SCpnt->request_bufflen);
1176 /* FIXME: drop lock and yield here ? */
1178 while (!mail_out(host, scb))
1179 cpu_relax(); /* keep trying */
1184 static int wd7000_diagnostics(Adapter * host, int code)
1186 static IcbDiag icb = { ICB_OP_DIAGNOSTICS };
1187 static unchar buf[256];
1188 unsigned long timeout;
1191 any2scsi(icb.len, sizeof(buf));
1192 any2scsi(icb.ptr, (int) &buf);
1195 * This routine is only called at init, so there should be OGMBs
1196 * available. I'm assuming so here. If this is going to
1197 * fail, I can just let the timeout catch the failure.
1199 mail_out(host, (struct scb *) &icb);
1200 timeout = jiffies + WAITnexttimeout; /* wait up to 2 seconds */
1201 while (icb.phase && time_before(jiffies, timeout)) {
1202 cpu_relax(); /* wait for completion */
1207 printk("wd7000_diagnostics: timed out.\n");
1210 if (make_code(icb.vue | (icb.status << 8), 0)) {
1211 printk("wd7000_diagnostics: failed (0x%02x,0x%02x)\n", icb.vue, icb.status);
1219 static int wd7000_adapter_reset(Adapter * host)
1221 InitCmd init_cmd = {
1233 * Reset the adapter - only. The SCSI bus was initialized at power-up,
1234 * and we need to do this just so we control the mailboxes, etc.
1236 outb(ASC_RES, host->iobase + ASC_CONTROL);
1237 udelay(40); /* reset pulse: this is 40us, only need 25us */
1238 outb(0, host->iobase + ASC_CONTROL);
1239 host->control = 0; /* this must always shadow ASC_CONTROL */
1241 if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
1242 printk(KERN_ERR "wd7000_init: WAIT timed out.\n");
1243 return -1; /* -1 = not ok */
1246 if ((diag = inb(host->iobase + ASC_INTR_STAT)) != 1) {
1247 printk("wd7000_init: ");
1251 printk(KERN_ERR "RAM failure.\n");
1254 printk(KERN_ERR "FIFO R/W failed\n");
1257 printk(KERN_ERR "SBIC register R/W failed\n");
1260 printk(KERN_ERR "Initialization D-FF failed.\n");
1263 printk(KERN_ERR "Host IRQ D-FF failed.\n");
1266 printk(KERN_ERR "ROM checksum error.\n");
1269 printk(KERN_ERR "diagnostic code 0x%02Xh received.\n", diag);
1273 /* Clear mailboxes */
1274 memset(&(host->mb), 0, sizeof(host->mb));
1276 /* Execute init command */
1277 any2scsi((unchar *) & (init_cmd.mailboxes), (int) &(host->mb));
1278 if (!command_out(host, (unchar *) & init_cmd, sizeof(init_cmd))) {
1279 printk(KERN_ERR "wd7000_adapter_reset: adapter initialization failed.\n");
1283 if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, ASC_INIT, 0)) {
1284 printk("wd7000_adapter_reset: WAIT timed out.\n");
1290 static int wd7000_init(Adapter * host)
1292 if (wd7000_adapter_reset(host) == -1)
1296 if (request_irq(host->irq, do_wd7000_intr_handle, SA_INTERRUPT, "wd7000", host)) {
1297 printk("wd7000_init: can't get IRQ %d.\n", host->irq);
1300 if (request_dma(host->dma, "wd7000")) {
1301 printk("wd7000_init: can't get DMA channel %d.\n", host->dma);
1302 free_irq(host->irq, host);
1305 wd7000_enable_dma(host);
1306 wd7000_enable_intr(host);
1308 if (!wd7000_diagnostics(host, ICB_DIAG_FULL)) {
1309 free_dma(host->dma);
1310 free_irq(host->irq, NULL);
1318 static void wd7000_revision(Adapter * host)
1320 static IcbRevLvl icb = { ICB_OP_GET_REVISION };
1324 * Like diagnostics, this is only done at init time, in fact, from
1325 * wd7000_detect, so there should be OGMBs available. If it fails,
1326 * the only damage will be that the revision will show up as 0.0,
1327 * which in turn means that scatter/gather will be disabled.
1329 mail_out(host, (struct scb *) &icb);
1331 cpu_relax(); /* wait for completion */
1334 host->rev1 = icb.primary;
1335 host->rev2 = icb.secondary;
1340 #define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
1342 static int wd7000_set_info(char *buffer, int length, struct Scsi_Host *host)
1344 dprintk("Buffer = <%.*s>, length = %d\n", length, buffer, length);
1347 * Currently this is a no-op
1349 dprintk("Sorry, this function is currently out of order...\n");
1354 static int wd7000_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
1356 Adapter *adapter = (Adapter *)host->hostdata;
1357 unsigned long flags;
1360 Mailbox *ogmbs, *icmbs;
1365 * Has data been written to the file ?
1368 return (wd7000_set_info(buffer, length, host));
1370 spin_lock_irqsave(host->host_lock, flags);
1371 SPRINTF("Host scsi%d: Western Digital WD-7000 (rev %d.%d)\n", host->host_no, adapter->rev1, adapter->rev2);
1372 SPRINTF(" IO base: 0x%x\n", adapter->iobase);
1373 SPRINTF(" IRQ: %d\n", adapter->irq);
1374 SPRINTF(" DMA channel: %d\n", adapter->dma);
1375 SPRINTF(" Interrupts: %d\n", adapter->int_counter);
1376 SPRINTF(" BUS_ON time: %d nanoseconds\n", adapter->bus_on * 125);
1377 SPRINTF(" BUS_OFF time: %d nanoseconds\n", adapter->bus_off * 125);
1380 ogmbs = adapter->mb.ogmb;
1381 icmbs = adapter->mb.icmb;
1383 SPRINTF("\nControl port value: 0x%x\n", adapter->control);
1384 SPRINTF("Incoming mailbox:\n");
1385 SPRINTF(" size: %d\n", ICMB_CNT);
1386 SPRINTF(" queued messages: ");
1388 for (i = count = 0; i < ICMB_CNT; i++)
1389 if (icmbs[i].status) {
1391 SPRINTF("0x%x ", i);
1394 SPRINTF(count ? "\n" : "none\n");
1396 SPRINTF("Outgoing mailbox:\n");
1397 SPRINTF(" size: %d\n", OGMB_CNT);
1398 SPRINTF(" next message: 0x%x\n", adapter->next_ogmb);
1399 SPRINTF(" queued messages: ");
1401 for (i = count = 0; i < OGMB_CNT; i++)
1402 if (ogmbs[i].status) {
1404 SPRINTF("0x%x ", i);
1407 SPRINTF(count ? "\n" : "none\n");
1410 spin_unlock_irqrestore(host->host_lock, flags);
1413 * Calculate start of next buffer, and return value.
1415 *start = buffer + offset;
1417 if ((pos - buffer) < offset)
1419 else if ((pos - buffer - offset) < length)
1420 return (pos - buffer - offset);
1427 * Returns the number of adapters this driver is supporting.
1429 * The source for hosts.c says to wait to call scsi_register until 100%
1430 * sure about an adapter. We need to do it a little sooner here; we
1431 * need the storage set up by scsi_register before wd7000_init, and
1432 * changing the location of an Adapter structure is more trouble than
1433 * calling scsi_unregister.
1437 static int wd7000_detect(Scsi_Host_Template * tpnt)
1439 short present = 0, biosaddr_ptr, sig_ptr, i, pass;
1440 short biosptr[NUM_CONFIGS];
1442 Adapter *host = NULL;
1443 struct Scsi_Host *sh;
1446 dprintk("wd7000_detect: started\n");
1450 wd7000_setup(wd7000);
1453 for (i = 0; i < UNITS; wd7000_host[i++] = NULL);
1454 for (i = 0; i < NUM_CONFIGS; biosptr[i++] = -1);
1456 tpnt->proc_name = "wd7000";
1457 tpnt->proc_info = &wd7000_proc_info;
1460 * Set up SCB free list, which is shared by all adapters
1464 for (pass = 0; pass < NUM_CONFIGS; pass++) {
1466 * First, search for BIOS SIGNATURE...
1468 for (biosaddr_ptr = 0; biosaddr_ptr < NUM_ADDRS; biosaddr_ptr++)
1469 for (sig_ptr = 0; sig_ptr < NUM_SIGNATURES; sig_ptr++) {
1470 for (i = 0; i < pass; i++)
1471 if (biosptr[i] == biosaddr_ptr)
1475 void *biosaddr = ioremap(wd7000_biosaddr[biosaddr_ptr] + signatures[sig_ptr].ofs,
1476 signatures[sig_ptr].len);
1477 short bios_match = 0;
1480 bios_match = memcmp((char *) biosaddr, signatures[sig_ptr].sig, signatures[sig_ptr].len);
1491 * BIOS SIGNATURE has been found.
1494 dprintk("wd7000_detect: pass %d\n", pass + 1);
1496 if (biosaddr_ptr == NUM_ADDRS)
1497 dprintk("WD-7000 SST BIOS not detected...\n");
1499 dprintk("WD-7000 SST BIOS detected at 0x%lx: checking...\n", wd7000_biosaddr[biosaddr_ptr]);
1502 if (configs[pass].irq < 0)
1508 iobase = configs[pass].iobase;
1510 dprintk("wd7000_detect: check IO 0x%x region...\n", iobase);
1512 if (request_region(iobase, 4, "wd7000")) {
1514 dprintk("wd7000_detect: ASC reset (IO 0x%x) ...", iobase);
1518 outb(ASC_RES, iobase + ASC_CONTROL);
1519 set_current_state(TASK_UNINTERRUPTIBLE);
1520 schedule_timeout(HZ / 100);
1521 outb(0, iobase + ASC_CONTROL);
1523 if (WAIT(iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
1524 dprintk("failed!\n");
1529 if (inb(iobase + ASC_INTR_STAT) == 1) {
1531 * We register here, to get a pointer to the extra space,
1532 * which we'll use as the Adapter structure (host) for
1533 * this adapter. It is located just after the registered
1534 * Scsi_Host structure (sh), and is located by the empty
1537 sh = scsi_register(tpnt, sizeof(Adapter));
1541 host = (Adapter *) sh->hostdata;
1543 dprintk("wd7000_detect: adapter allocated at 0x%x\n", (int) host);
1544 memset(host, 0, sizeof(Adapter));
1546 host->irq = configs[pass].irq;
1547 host->dma = configs[pass].dma;
1548 host->iobase = iobase;
1549 host->int_counter = 0;
1550 host->bus_on = configs[pass].bus_on;
1551 host->bus_off = configs[pass].bus_off;
1552 host->sh = wd7000_host[unit] = sh;
1555 dprintk("wd7000_detect: Trying init WD-7000 card at IO " "0x%x, IRQ %d, DMA %d...\n", host->iobase, host->irq, host->dma);
1557 if (!wd7000_init(host)) /* Initialization failed */
1558 goto err_unregister;
1561 * OK from here - we'll use this adapter/configuration.
1563 wd7000_revision(host); /* important for scatter/gather */
1566 * For boards before rev 6.0, scatter/gather isn't supported.
1569 sh->sg_tablesize = SG_NONE;
1571 present++; /* count it */
1573 if (biosaddr_ptr != NUM_ADDRS)
1574 biosptr[pass] = biosaddr_ptr;
1576 printk(KERN_INFO "Western Digital WD-7000 (rev %d.%d) ", host->rev1, host->rev2);
1577 printk("using IO 0x%x, IRQ %d, DMA %d.\n", host->iobase, host->irq, host->dma);
1578 printk(" BUS_ON time: %dns, BUS_OFF time: %dns\n", host->bus_on * 125, host->bus_off * 125);
1581 dprintk("wd7000_detect: IO 0x%x region already allocated!\n", iobase);
1586 scsi_unregister(sh);
1588 release_region(iobase, 4);
1593 printk("Failed initialization of WD-7000 SCSI card!\n");
1598 static int wd7000_release(struct Scsi_Host *shost)
1601 free_irq(shost->irq, NULL);
1602 if (shost->io_port && shost->n_io_port)
1603 release_region(shost->io_port, shost->n_io_port);
1604 scsi_unregister(shost);
1609 * I have absolutely NO idea how to do an abort with the WD7000...
1611 static int wd7000_abort(Scsi_Cmnd * SCpnt)
1613 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1615 if (inb(host->iobase + ASC_STAT) & INT_IM) {
1616 printk("wd7000_abort: lost interrupt\n");
1617 wd7000_intr_handle(host->irq, NULL, NULL);
1625 * I also have no idea how to do a reset...
1628 static int wd7000_bus_reset(Scsi_Cmnd * SCpnt)
1633 static int wd7000_device_reset(Scsi_Cmnd * SCpnt)
1639 * Last resort. Reinitialize the board.
1642 static int wd7000_host_reset(Scsi_Cmnd * SCpnt)
1644 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1646 if (wd7000_adapter_reset(host) < 0)
1648 wd7000_enable_intr(host);
1654 * This was borrowed directly from aha1542.c. (Zaga)
1657 static int wd7000_biosparam(struct scsi_device *sdev,
1658 struct block_device *bdev, sector_t capacity, int *ip)
1660 char b[BDEVNAME_SIZE];
1662 dprintk("wd7000_biosparam: dev=%s, size=%d, ",
1663 bdevname(bdev, b), capacity);
1664 (void)b; /* unused var warning? */
1667 * try default translation
1671 ip[2] = capacity >> 11;
1674 * for disks >1GB do some guessing
1676 if (ip[2] >= 1024) {
1680 * try to figure out the geometry from the partition table
1682 if ((scsicam_bios_param(bdev, capacity, info) < 0) || !(((info[0] == 64) && (info[1] == 32)) || ((info[0] == 255) && (info[1] == 63)))) {
1683 printk("wd7000_biosparam: unable to verify geometry for disk with >1GB.\n" " using extended translation.\n");
1687 ip[2] = (unsigned long) capacity / (255 * 63);
1694 printk(KERN_INFO "%s: current partition table is " "using extended translation.\n", __FUNCTION__);
1698 dprintk("bios geometry: head=%d, sec=%d, cyl=%d\n", ip[0], ip[1], ip[2]);
1699 dprintk("WARNING: check, if the bios geometry is correct.\n");
1704 MODULE_AUTHOR("Thomas Wuensche, John Boyd, Miroslav Zagorac");
1705 MODULE_DESCRIPTION("Driver for the WD7000 series ISA controllers");
1706 MODULE_LICENSE("GPL");
1708 static Scsi_Host_Template driver_template = {
1709 .proc_name = "wd7000",
1710 .proc_info = wd7000_proc_info,
1711 .name = "Western Digital WD-7000",
1712 .detect = wd7000_detect,
1713 .release = wd7000_release,
1714 .queuecommand = wd7000_queuecommand,
1715 .eh_bus_reset_handler = wd7000_bus_reset,
1716 .eh_device_reset_handler = wd7000_device_reset,
1717 .eh_host_reset_handler = wd7000_host_reset,
1718 .bios_param = wd7000_biosparam,
1719 .can_queue = WD7000_Q,
1721 .sg_tablesize = WD7000_SG,
1723 .unchecked_isa_dma = 1,
1724 .use_clustering = ENABLE_CLUSTERING,
1727 #include "scsi_module.c"