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@lxorguk.ukuu.org.uk>
151 * Use dev_id for interrupts, kill __func__ 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@lxorguk.ukuu.org.uk>
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 definition
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/spinlock.h>
175 #include <linux/ioport.h>
176 #include <linux/proc_fs.h>
177 #include <linux/blkdev.h>
178 #include <linux/init.h>
179 #include <linux/stat.h>
180 #include <linux/io.h>
184 #include <scsi/scsi.h>
185 #include <scsi/scsi_cmnd.h>
186 #include <scsi/scsi_device.h>
187 #include <scsi/scsi_host.h>
188 #include <scsi/scsicam.h>
191 #undef WD7000_DEBUG /* general debug */
193 #define dprintk printk
195 #define dprintk(format,args...)
199 * Mailbox structure sizes.
200 * I prefer to keep the number of ICMBs much larger than the number of
201 * OGMBs. OGMBs are used very quickly by the driver to start one or
202 * more commands, while ICMBs are used by the host adapter per command.
208 * Scb's are shared by all active adapters. So, if they all become busy,
209 * callers may be made to wait in alloc_scbs for them to free. That can
210 * be avoided by setting MAX_SCBS to NUM_CONFIG * WD7000_Q. If you'd
211 * rather conserve memory, use a smaller number (> 0, of course) - things
212 * will should still work OK.
217 * In this version, sg_tablesize now defaults to WD7000_SG, and will
218 * be set to SG_NONE for older boards. This is the reverse of the
219 * previous default, and was changed so that the driver-level
220 * scsi_host_template would reflect the driver's support for scatter/
223 * Also, it has been reported that boards at Revision 6 support scatter/
224 * gather, so the new definition of an "older" board has been changed
232 * WD7000-specific mailbox structure
235 typedef volatile struct mailbox {
237 unchar scbptr[3]; /* SCSI-style - MSB first (big endian) */
241 * This structure should contain all per-adapter global data. I.e., any
242 * new global per-adapter data should put in here.
244 typedef struct adapter {
245 struct Scsi_Host *sh; /* Pointer to Scsi_Host structure */
246 int iobase; /* This adapter's I/O base address */
247 int irq; /* This adapter's IRQ level */
248 int dma; /* This adapter's DMA channel */
249 int int_counter; /* This adapter's interrupt counter */
250 int bus_on; /* This adapter's BUS_ON time */
251 int bus_off; /* This adapter's BUS_OFF time */
252 struct { /* This adapter's mailboxes */
253 Mailbox ogmb[OGMB_CNT]; /* Outgoing mailboxes */
254 Mailbox icmb[ICMB_CNT]; /* Incoming mailboxes */
256 int next_ogmb; /* to reduce contention at mailboxes */
257 unchar control; /* shadows CONTROL port value */
258 unchar rev1, rev2; /* filled in by wd7000_revision */
262 * (linear) base address for ROM BIOS
264 static const long wd7000_biosaddr[] = {
265 0xc0000, 0xc2000, 0xc4000, 0xc6000, 0xc8000, 0xca000, 0xcc000, 0xce000,
266 0xd0000, 0xd2000, 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0xde000
268 #define NUM_ADDRS ARRAY_SIZE(wd7000_biosaddr)
270 static const unsigned short wd7000_iobase[] = {
271 0x0300, 0x0308, 0x0310, 0x0318, 0x0320, 0x0328, 0x0330, 0x0338,
272 0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370, 0x0378,
273 0x0380, 0x0388, 0x0390, 0x0398, 0x03a0, 0x03a8, 0x03b0, 0x03b8,
274 0x03c0, 0x03c8, 0x03d0, 0x03d8, 0x03e0, 0x03e8, 0x03f0, 0x03f8
276 #define NUM_IOPORTS ARRAY_SIZE(wd7000_iobase)
278 static const short wd7000_irq[] = { 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 };
279 #define NUM_IRQS ARRAY_SIZE(wd7000_irq)
281 static const short wd7000_dma[] = { 5, 6, 7 };
282 #define NUM_DMAS ARRAY_SIZE(wd7000_dma)
285 * The following is set up by wd7000_detect, and used thereafter for
286 * proc and other global ookups
290 static struct Scsi_Host *wd7000_host[UNITS];
292 #define BUS_ON 64 /* x 125ns = 8000ns (BIOS default) */
293 #define BUS_OFF 15 /* x 125ns = 1875ns (BIOS default) */
296 * Standard Adapter Configurations - used by wd7000_detect
299 short irq; /* IRQ level */
300 short dma; /* DMA channel */
301 unsigned iobase; /* I/O base address */
302 short bus_on; /* Time that WD7000 spends on the AT-bus when */
303 /* transferring data. BIOS default is 8000ns. */
304 short bus_off; /* Time that WD7000 spends OFF THE BUS after */
305 /* while it is transferring data. */
306 /* BIOS default is 1875ns */
310 * Add here your configuration...
312 static Config configs[] = {
313 {15, 6, 0x350, BUS_ON, BUS_OFF}, /* defaults for single adapter */
314 {11, 5, 0x320, BUS_ON, BUS_OFF}, /* defaults for second adapter */
315 {7, 6, 0x350, BUS_ON, BUS_OFF}, /* My configuration (Zaga) */
316 {-1, -1, 0x0, BUS_ON, BUS_OFF} /* Empty slot */
318 #define NUM_CONFIGS ARRAY_SIZE(configs)
321 * The following list defines strings to look for in the BIOS that identify
322 * it as the WD7000-FASST2 SST BIOS. I suspect that something should be
323 * added for the Future Domain version.
325 typedef struct signature {
326 const char *sig; /* String to look for */
327 unsigned long ofs; /* offset from BIOS base address */
328 unsigned len; /* length of string */
331 static const Signature signatures[] = {
332 {"SSTBIOS", 0x0000d, 7} /* "SSTBIOS" @ offset 0x0000d */
334 #define NUM_SIGNATURES ARRAY_SIZE(signatures)
338 * I/O Port Offsets and Bit Definitions
339 * 4 addresses are used. Those not defined here are reserved.
341 #define ASC_STAT 0 /* Status, Read */
342 #define ASC_COMMAND 0 /* Command, Write */
343 #define ASC_INTR_STAT 1 /* Interrupt Status, Read */
344 #define ASC_INTR_ACK 1 /* Acknowledge, Write */
345 #define ASC_CONTROL 2 /* Control, Write */
350 #define INT_IM 0x80 /* Interrupt Image Flag */
351 #define CMD_RDY 0x40 /* Command Port Ready */
352 #define CMD_REJ 0x20 /* Command Port Byte Rejected */
353 #define ASC_INIT 0x10 /* ASC Initialized Flag */
354 #define ASC_STATMASK 0xf0 /* The lower 4 Bytes are reserved */
359 * Unfortunately, I have no idea how to properly use some of these commands,
360 * as the OEM manual does not make it clear. I have not been able to use
361 * enable/disable unsolicited interrupts or the reset commands with any
362 * discernible effect whatsoever. I think they may be related to certain
363 * ICB commands, but again, the OEM manual doesn't make that clear.
365 #define NO_OP 0 /* NO-OP toggles CMD_RDY bit in ASC_STAT */
366 #define INITIALIZATION 1 /* initialization (10 bytes) */
367 #define DISABLE_UNS_INTR 2 /* disable unsolicited interrupts */
368 #define ENABLE_UNS_INTR 3 /* enable unsolicited interrupts */
369 #define INTR_ON_FREE_OGMB 4 /* interrupt on free OGMB */
370 #define SOFT_RESET 5 /* SCSI bus soft reset */
371 #define HARD_RESET_ACK 6 /* SCSI bus hard reset acknowledge */
372 #define START_OGMB 0x80 /* start command in OGMB (n) */
373 #define SCAN_OGMBS 0xc0 /* start multiple commands, signature (n) */
374 /* where (n) = lower 6 bits */
376 * For INITIALIZATION:
378 typedef struct initCmd {
379 unchar op; /* command opcode (= 1) */
380 unchar ID; /* Adapter's SCSI ID */
381 unchar bus_on; /* Bus on time, x 125ns (see below) */
382 unchar bus_off; /* Bus off time, "" "" */
383 unchar rsvd; /* Reserved */
384 unchar mailboxes[3]; /* Address of Mailboxes, MSB first */
385 unchar ogmbs; /* Number of outgoing MBs, max 64, 0,1 = 1 */
386 unchar icmbs; /* Number of incoming MBs, "" "" */
390 * Interrupt Status Port - also returns diagnostic codes at ASC reset
392 * if msb is zero, the lower bits are diagnostic status
394 * 01 No diagnostic error occurred
397 * 04 SBIC register read/write failed
398 * 05 Initialization D-FF failed
399 * 06 Host IRQ D-FF failed
400 * 07 ROM checksum error
401 * Interrupt status (bitwise):
402 * 10NNNNNN outgoing mailbox NNNNNN is free
403 * 11NNNNNN incoming mailbox NNNNNN needs service
405 #define MB_INTR 0xC0 /* Mailbox Service possible/required */
406 #define IMB_INTR 0x40 /* 1 Incoming / 0 Outgoing */
407 #define MB_MASK 0x3f /* mask for mailbox number */
412 #define INT_EN 0x08 /* Interrupt Enable */
413 #define DMA_EN 0x04 /* DMA Enable */
414 #define SCSI_RES 0x02 /* SCSI Reset */
415 #define ASC_RES 0x01 /* ASC Reset */
418 * Driver data structures:
419 * - mb and scbs are required for interfacing with the host adapter.
420 * An SCB has extra fields not visible to the adapter; mb's
421 * _cannot_ do this, since the adapter assumes they are contiguous in
422 * memory, 4 bytes each, with ICMBs following OGMBs, and uses this fact
424 * - An icb is for host-only (non-SCSI) commands. ICBs are 16 bytes each;
425 * the additional bytes are used only by the driver.
426 * - For now, a pool of SCBs are kept in global storage by this driver,
427 * and are allocated and freed as needed.
429 * The 7000-FASST2 marks OGMBs empty as soon as it has _started_ a command,
430 * not when it has finished. Since the SCB must be around for completion,
431 * problems arise when SCBs correspond to OGMBs, which may be reallocated
432 * earlier (or delayed unnecessarily until a command completes).
433 * Mailboxes are used as transient data structures, simply for
434 * carrying SCB addresses to/from the 7000-FASST2.
436 * Note also since SCBs are not "permanently" associated with mailboxes,
437 * there is no need to keep a global list of scsi_cmnd pointers indexed
438 * by OGMB. Again, SCBs reference their scsi_cmnds directly, so mailbox
439 * indices need not be involved.
443 * WD7000-specific scatter/gather element structure
447 unchar ptr[3]; /* Also SCSI-style - MSB first */
450 typedef struct scb { /* Command Control Block 5.4.1 */
451 unchar op; /* Command Control Block Operation Code */
452 unchar idlun; /* op=0,2:Target Id, op=1:Initiator Id */
453 /* Outbound data transfer, length is checked */
454 /* Inbound data transfer, length is checked */
455 /* Logical Unit Number */
456 unchar cdb[12]; /* SCSI Command Block */
457 volatile unchar status; /* SCSI Return Status */
458 volatile unchar vue; /* Vendor Unique Error Code */
459 unchar maxlen[3]; /* Maximum Data Transfer Length */
460 unchar dataptr[3]; /* SCSI Data Block Pointer */
461 unchar linkptr[3]; /* Next Command Link Pointer */
462 unchar direc; /* Transfer Direction */
463 unchar reserved2[6]; /* SCSI Command Descriptor Block */
464 /* end of hardware SCB */
465 struct scsi_cmnd *SCpnt;/* scsi_cmnd using this SCB */
466 Sgb sgb[WD7000_SG]; /* Scatter/gather list for this SCB */
467 Adapter *host; /* host adapter */
468 struct scb *next; /* for lists of scbs */
472 * This driver is written to allow host-only commands to be executed.
473 * These use a 16-byte block called an ICB. The format is extended by the
474 * driver to 18 bytes, to support the status returned in the ICMB and
475 * an execution phase code.
477 * There are other formats besides these; these are the ones I've tried
478 * to use. Formats for some of the defined ICB opcodes are not defined
479 * (notably, get/set unsolicited interrupt status) in my copy of the OEM
480 * manual, and others are ambiguous/hard to follow.
482 #define ICB_OP_MASK 0x80 /* distinguishes scbs from icbs */
483 #define ICB_OP_OPEN_RBUF 0x80 /* open receive buffer */
484 #define ICB_OP_RECV_CMD 0x81 /* receive command from initiator */
485 #define ICB_OP_RECV_DATA 0x82 /* receive data from initiator */
486 #define ICB_OP_RECV_SDATA 0x83 /* receive data with status from init. */
487 #define ICB_OP_SEND_DATA 0x84 /* send data with status to initiator */
488 #define ICB_OP_SEND_STAT 0x86 /* send command status to initiator */
489 /* 0x87 is reserved */
490 #define ICB_OP_READ_INIT 0x88 /* read initialization bytes */
491 #define ICB_OP_READ_ID 0x89 /* read adapter's SCSI ID */
492 #define ICB_OP_SET_UMASK 0x8A /* set unsolicited interrupt mask */
493 #define ICB_OP_GET_UMASK 0x8B /* read unsolicited interrupt mask */
494 #define ICB_OP_GET_REVISION 0x8C /* read firmware revision level */
495 #define ICB_OP_DIAGNOSTICS 0x8D /* execute diagnostics */
496 #define ICB_OP_SET_EPARMS 0x8E /* set execution parameters */
497 #define ICB_OP_GET_EPARMS 0x8F /* read execution parameters */
499 typedef struct icbRecvCmd {
501 unchar IDlun; /* Initiator SCSI ID/lun */
502 unchar len[3]; /* command buffer length */
503 unchar ptr[3]; /* command buffer address */
504 unchar rsvd[7]; /* reserved */
505 volatile unchar vue; /* vendor-unique error code */
506 volatile unchar status; /* returned (icmb) status */
507 volatile unchar phase; /* used by interrupt handler */
510 typedef struct icbSendStat {
512 unchar IDlun; /* Target SCSI ID/lun */
513 unchar stat; /* (outgoing) completion status byte 1 */
514 unchar rsvd[12]; /* reserved */
515 volatile unchar vue; /* vendor-unique error code */
516 volatile unchar status; /* returned (icmb) status */
517 volatile unchar phase; /* used by interrupt handler */
520 typedef struct icbRevLvl {
522 volatile unchar primary; /* primary revision level (returned) */
523 volatile unchar secondary; /* secondary revision level (returned) */
524 unchar rsvd[12]; /* reserved */
525 volatile unchar vue; /* vendor-unique error code */
526 volatile unchar status; /* returned (icmb) status */
527 volatile unchar phase; /* used by interrupt handler */
530 typedef struct icbUnsMask { /* I'm totally guessing here */
532 volatile unchar mask[14]; /* mask bits */
534 unchar rsvd[12]; /* reserved */
536 volatile unchar vue; /* vendor-unique error code */
537 volatile unchar status; /* returned (icmb) status */
538 volatile unchar phase; /* used by interrupt handler */
541 typedef struct icbDiag {
543 unchar type; /* diagnostics type code (0-3) */
544 unchar len[3]; /* buffer length */
545 unchar ptr[3]; /* buffer address */
546 unchar rsvd[7]; /* reserved */
547 volatile unchar vue; /* vendor-unique error code */
548 volatile unchar status; /* returned (icmb) status */
549 volatile unchar phase; /* used by interrupt handler */
552 #define ICB_DIAG_POWERUP 0 /* Power-up diags only */
553 #define ICB_DIAG_WALKING 1 /* walking 1's pattern */
554 #define ICB_DIAG_DMA 2 /* DMA - system memory diags */
555 #define ICB_DIAG_FULL 3 /* do both 1 & 2 */
557 typedef struct icbParms {
559 unchar rsvd1; /* reserved */
560 unchar len[3]; /* parms buffer length */
561 unchar ptr[3]; /* parms buffer address */
562 unchar idx[2]; /* index (MSB-LSB) */
563 unchar rsvd2[5]; /* reserved */
564 volatile unchar vue; /* vendor-unique error code */
565 volatile unchar status; /* returned (icmb) status */
566 volatile unchar phase; /* used by interrupt handler */
569 typedef struct icbAny {
571 unchar data[14]; /* format-specific data */
572 volatile unchar vue; /* vendor-unique error code */
573 volatile unchar status; /* returned (icmb) status */
574 volatile unchar phase; /* used by interrupt handler */
578 unchar op; /* ICB opcode */
579 IcbRecvCmd recv_cmd; /* format for receive command */
580 IcbSendStat send_stat; /* format for send status */
581 IcbRevLvl rev_lvl; /* format for get revision level */
582 IcbDiag diag; /* format for execute diagnostics */
583 IcbParms eparms; /* format for get/set exec parms */
584 IcbAny icb; /* generic format */
590 module_param(wd7000, charp, 0);
594 * Driver SCB structure pool.
596 * The SCBs declared here are shared by all host adapters; hence, this
597 * structure is not part of the Adapter structure.
599 static Scb scbs[MAX_SCBS];
600 static Scb *scbfree; /* free list */
601 static int freescbs = MAX_SCBS; /* free list counter */
602 static spinlock_t scbpool_lock; /* guards the scb free list and count */
605 * END of data/declarations - code follows.
607 static void __init setup_error(char *mesg, int *ints)
610 printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x\" -> %s\n", ints[1], ints[2], ints[3], mesg);
611 else if (ints[0] == 4)
612 printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], mesg);
614 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);
619 * Note: You can now set these options from the kernel's "command line".
622 * wd7000=<IRQ>,<DMA>,<IO>[,<BUS_ON>[,<BUS_OFF>]]
624 * , where BUS_ON and BUS_OFF are in nanoseconds. BIOS default values
625 * are 8000ns for BUS_ON and 1875ns for BUS_OFF.
629 * will configure the driver for a WD-7000 controller
630 * using IRQ 15 with a DMA channel 6, at IO base address 0x350.
632 static int __init wd7000_setup(char *str)
634 static short wd7000_card_num; /* .bss will zero this */
638 (void) get_options(str, ARRAY_SIZE(ints), ints);
640 if (wd7000_card_num >= NUM_CONFIGS) {
641 printk(KERN_ERR "%s: Too many \"wd7000=\" configurations in " "command line!\n", __func__);
645 if ((ints[0] < 3) || (ints[0] > 5)) {
646 printk(KERN_ERR "%s: Error in command line! " "Usage: wd7000=<IRQ>,<DMA>,IO>[,<BUS_ON>" "[,<BUS_OFF>]]\n", __func__);
648 for (i = 0; i < NUM_IRQS; i++)
649 if (ints[1] == wd7000_irq[i])
653 setup_error("invalid IRQ.", ints);
656 configs[wd7000_card_num].irq = ints[1];
658 for (i = 0; i < NUM_DMAS; i++)
659 if (ints[2] == wd7000_dma[i])
663 setup_error("invalid DMA channel.", ints);
666 configs[wd7000_card_num].dma = ints[2];
668 for (i = 0; i < NUM_IOPORTS; i++)
669 if (ints[3] == wd7000_iobase[i])
672 if (i == NUM_IOPORTS) {
673 setup_error("invalid I/O base address.", ints);
676 configs[wd7000_card_num].iobase = ints[3];
679 if ((ints[4] < 500) || (ints[4] > 31875)) {
680 setup_error("BUS_ON value is out of range (500" " to 31875 nanoseconds)!", ints);
681 configs[wd7000_card_num].bus_on = BUS_ON;
683 configs[wd7000_card_num].bus_on = ints[4] / 125;
685 configs[wd7000_card_num].bus_on = BUS_ON;
688 if ((ints[5] < 500) || (ints[5] > 31875)) {
689 setup_error("BUS_OFF value is out of range (500" " to 31875 nanoseconds)!", ints);
690 configs[wd7000_card_num].bus_off = BUS_OFF;
692 configs[wd7000_card_num].bus_off = ints[5] / 125;
694 configs[wd7000_card_num].bus_off = BUS_OFF;
696 if (wd7000_card_num) {
697 for (i = 0; i < (wd7000_card_num - 1); i++) {
700 for (; j < wd7000_card_num; j++)
701 if (configs[i].irq == configs[j].irq) {
702 setup_error("duplicated IRQ!", ints);
705 if (configs[i].dma == configs[j].dma) {
706 setup_error("duplicated DMA " "channel!", ints);
709 if (configs[i].iobase == configs[j].iobase) {
710 setup_error("duplicated I/O " "base address!", ints);
716 dprintk(KERN_DEBUG "wd7000_setup: IRQ=%d, DMA=%d, I/O=0x%x, "
717 "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);
724 __setup("wd7000=", wd7000_setup);
726 static inline void any2scsi(unchar * scsi, int any)
728 *scsi++ = (unsigned)any >> 16;
729 *scsi++ = (unsigned)any >> 8;
733 static inline int scsi2int(unchar * scsi)
735 return (scsi[0] << 16) | (scsi[1] << 8) | scsi[2];
738 static inline void wd7000_enable_intr(Adapter * host)
740 host->control |= INT_EN;
741 outb(host->control, host->iobase + ASC_CONTROL);
745 static inline void wd7000_enable_dma(Adapter * host)
748 host->control |= DMA_EN;
749 outb(host->control, host->iobase + ASC_CONTROL);
751 flags = claim_dma_lock();
752 set_dma_mode(host->dma, DMA_MODE_CASCADE);
753 enable_dma(host->dma);
754 release_dma_lock(flags);
759 #define WAITnexttimeout 200 /* 2 seconds */
761 static inline short WAIT(unsigned port, unsigned mask, unsigned allof, unsigned noneof)
764 unsigned long WAITtimeout = jiffies + WAITnexttimeout;
766 while (time_before_eq(jiffies, WAITtimeout)) {
767 WAITbits = inb(port) & mask;
769 if (((WAITbits & allof) == allof) && ((WAITbits & noneof) == 0))
777 static inline int command_out(Adapter * host, unchar * cmd, int len)
779 if (!WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
782 outb(*cmd, host->iobase + ASC_COMMAND);
783 WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0);
784 } while (inb(host->iobase + ASC_STAT) & CMD_REJ);
792 printk(KERN_WARNING "wd7000 command_out: WAIT failed(%d)\n", len + 1);
799 * This version of alloc_scbs is in preparation for supporting multiple
800 * commands per lun and command chaining, by queueing pending commands.
801 * We will need to allocate Scbs in blocks since they will wait to be
802 * executed so there is the possibility of deadlock otherwise.
803 * Also, to keep larger requests from being starved by smaller requests,
804 * we limit access to this routine with an internal busy flag, so that
805 * the satisfiability of a request is not dependent on the size of the
808 static inline Scb *alloc_scbs(struct Scsi_Host *host, int needed)
812 unsigned long timeout = jiffies + WAITnexttimeout;
817 return (NULL); /* sanity check */
819 spin_unlock_irq(host->host_lock);
822 while (freescbs < needed) {
823 timeout = jiffies + WAITnexttimeout;
825 /* FIXME: can we actually just yield here ?? */
826 for (now = jiffies; now == jiffies;)
827 cpu_relax(); /* wait a jiffy */
828 } while (freescbs < needed && time_before_eq(jiffies, timeout));
830 * If we get here with enough free Scbs, we can take them.
831 * Otherwise, we timed out and didn't get enough.
833 if (freescbs < needed) {
834 printk(KERN_ERR "wd7000: can't get enough free SCBs.\n");
839 /* Take the lock, then check we didn't get beaten, if so try again */
840 spin_lock_irqsave(&scbpool_lock, flags);
841 if (freescbs < needed) {
842 spin_unlock_irqrestore(&scbpool_lock, flags);
848 for (i = 0; i < needed; i++) {
854 spin_unlock_irqrestore(&scbpool_lock, flags);
856 spin_lock_irq(host->host_lock);
861 static inline void free_scb(Scb * scb)
865 spin_lock_irqsave(&scbpool_lock, flags);
867 memset(scb, 0, sizeof(Scb));
872 spin_unlock_irqrestore(&scbpool_lock, flags);
876 static inline void init_scbs(void)
880 spin_lock_init(&scbpool_lock);
882 /* This is only ever called before the SCB pool is active */
884 scbfree = &(scbs[0]);
885 memset(scbs, 0, sizeof(scbs));
886 for (i = 0; i < MAX_SCBS - 1; i++) {
887 scbs[i].next = &(scbs[i + 1]);
888 scbs[i].SCpnt = NULL;
890 scbs[MAX_SCBS - 1].next = NULL;
891 scbs[MAX_SCBS - 1].SCpnt = NULL;
895 static int mail_out(Adapter * host, Scb * scbptr)
897 * Note: this can also be used for ICBs; just cast to the parm type.
903 Mailbox *ogmbs = host->mb.ogmb;
904 int *next_ogmb = &(host->next_ogmb);
906 dprintk("wd7000_mail_out: 0x%06lx", (long) scbptr);
908 /* We first look for a free outgoing mailbox */
909 spin_lock_irqsave(host->sh->host_lock, flags);
911 for (i = 0; i < OGMB_CNT; i++) {
912 if (ogmbs[ogmb].status == 0) {
913 dprintk(" using OGMB 0x%x", ogmb);
914 ogmbs[ogmb].status = 1;
915 any2scsi((unchar *) ogmbs[ogmb].scbptr, (int) scbptr);
917 *next_ogmb = (ogmb + 1) % OGMB_CNT;
920 ogmb = (ogmb + 1) % OGMB_CNT;
922 spin_unlock_irqrestore(host->sh->host_lock, flags);
924 dprintk(", scb is 0x%06lx", (long) scbptr);
928 * Alternatively, we might issue the "interrupt on free OGMB",
929 * and sleep, but it must be ensured that it isn't the init
930 * task running. Instead, this version assumes that the caller
931 * will be persistent, and try again. Since it's the adapter
932 * that marks OGMB's free, waiting even with interrupts off
933 * should work, since they are freed very quickly in most cases.
935 dprintk(", no free OGMBs.\n");
939 wd7000_enable_intr(host);
941 start_ogmb = START_OGMB | ogmb;
942 command_out(host, &start_ogmb, 1);
944 dprintk(", awaiting interrupt.\n");
950 static int make_code(unsigned hosterr, unsigned scsierr)
953 int in_error = hosterr;
956 switch ((hosterr >> 8) & 0xff) {
957 case 0: /* Reserved */
960 case 1: /* Command Complete, no errors */
963 case 2: /* Command complete, error logged in scb status (scsierr) */
966 case 4: /* Command failed to complete - timeout */
967 hosterr = DID_TIME_OUT;
969 case 5: /* Command terminated; Bus reset by external device */
972 case 6: /* Unexpected Command Received w/ host as target */
973 hosterr = DID_BAD_TARGET;
975 case 80: /* Unexpected Reselection */
976 case 81: /* Unexpected Selection */
977 hosterr = DID_BAD_INTR;
979 case 82: /* Abort Command Message */
982 case 83: /* SCSI Bus Software Reset */
983 case 84: /* SCSI Bus Hardware Reset */
986 default: /* Reserved */
990 if (scsierr || hosterr)
991 dprintk("\nSCSI command error: SCSI 0x%02x host 0x%04x return %d\n", scsierr, in_error, hosterr);
993 return (scsierr | (hosterr << 16));
996 #define wd7000_intr_ack(host) outb (0, host->iobase + ASC_INTR_ACK)
999 static irqreturn_t wd7000_intr(int irq, void *dev_id)
1001 Adapter *host = (Adapter *) dev_id;
1002 int flag, icmb, errstatus, icmb_status;
1003 int host_error, scsi_error;
1004 Scb *scb; /* for SCSI commands */
1005 IcbAny *icb; /* for host commands */
1006 struct scsi_cmnd *SCpnt;
1007 Mailbox *icmbs = host->mb.icmb;
1008 unsigned long flags;
1010 spin_lock_irqsave(host->sh->host_lock, flags);
1011 host->int_counter++;
1013 dprintk("wd7000_intr: irq = %d, host = 0x%06lx\n", irq, (long) host);
1015 flag = inb(host->iobase + ASC_INTR_STAT);
1017 dprintk("wd7000_intr: intr stat = 0x%02x\n", flag);
1019 if (!(inb(host->iobase + ASC_STAT) & INT_IM)) {
1020 /* NB: these are _very_ possible if IRQ 15 is being used, since
1021 * it's the "garbage collector" on the 2nd 8259 PIC. Specifically,
1022 * any interrupt signal into the 8259 which can't be identified
1023 * comes out as 7 from the 8259, which is 15 to the host. Thus, it
1024 * is a good thing the WD7000 has an interrupt status port, so we
1025 * can sort these out. Otherwise, electrical noise and other such
1026 * problems would be indistinguishable from valid interrupts...
1028 dprintk("wd7000_intr: phantom interrupt...\n");
1032 if (!(flag & MB_INTR))
1035 /* The interrupt is for a mailbox */
1036 if (!(flag & IMB_INTR)) {
1037 dprintk("wd7000_intr: free outgoing mailbox\n");
1039 * If sleep_on() and the "interrupt on free OGMB" command are
1040 * used in mail_out(), wake_up() should correspondingly be called
1041 * here. For now, we don't need to do anything special.
1046 /* The interrupt is for an incoming mailbox */
1047 icmb = flag & MB_MASK;
1048 icmb_status = icmbs[icmb].status;
1049 if (icmb_status & 0x80) { /* unsolicited - result in ICMB */
1050 dprintk("wd7000_intr: unsolicited interrupt 0x%02x\n", icmb_status);
1054 /* Aaaargh! (Zaga) */
1055 scb = isa_bus_to_virt(scsi2int((unchar *) icmbs[icmb].scbptr));
1056 icmbs[icmb].status = 0;
1057 if (scb->op & ICB_OP_MASK) { /* an SCB is done */
1058 icb = (IcbAny *) scb;
1059 icb->status = icmb_status;
1065 if (--(SCpnt->SCp.phase) <= 0) { /* all scbs are done */
1066 host_error = scb->vue | (icmb_status << 8);
1067 scsi_error = scb->status;
1068 errstatus = make_code(host_error, scsi_error);
1069 SCpnt->result = errstatus;
1073 SCpnt->scsi_done(SCpnt);
1077 dprintk("wd7000_intr: return from interrupt handler\n");
1078 wd7000_intr_ack(host);
1080 spin_unlock_irqrestore(host->sh->host_lock, flags);
1084 static int wd7000_queuecommand_lck(struct scsi_cmnd *SCpnt,
1085 void (*done)(struct scsi_cmnd *))
1089 unchar *cdb = (unchar *) SCpnt->cmnd;
1093 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1095 cdblen = SCpnt->cmd_len;
1096 idlun = ((SCpnt->device->id << 5) & 0xe0) | (SCpnt->device->lun & 7);
1097 SCpnt->scsi_done = done;
1098 SCpnt->SCp.phase = 1;
1099 scb = alloc_scbs(SCpnt->device->host, 1);
1101 memcpy(scb->cdb, cdb, cdblen);
1102 scb->direc = 0x40; /* Disable direction check */
1104 scb->SCpnt = SCpnt; /* so we can find stuff later */
1105 SCpnt->host_scribble = (unchar *) scb;
1108 nseg = scsi_sg_count(SCpnt);
1110 struct scatterlist *sg;
1113 dprintk("Using scatter/gather with %d elements.\n", nseg);
1117 any2scsi(scb->dataptr, (int) sgb);
1118 any2scsi(scb->maxlen, nseg * sizeof(Sgb));
1120 scsi_for_each_sg(SCpnt, sg, nseg, i) {
1121 any2scsi(sgb[i].ptr, isa_page_to_bus(sg_page(sg)) + sg->offset);
1122 any2scsi(sgb[i].len, sg->length);
1127 struct scatterlist *sg = scsi_sglist(SCpnt);
1128 any2scsi(scb->dataptr, isa_page_to_bus(sg_page(sg)) + sg->offset);
1130 any2scsi(scb->maxlen, scsi_bufflen(SCpnt));
1133 /* FIXME: drop lock and yield here ? */
1135 while (!mail_out(host, scb))
1136 cpu_relax(); /* keep trying */
1141 static DEF_SCSI_QCMD(wd7000_queuecommand)
1143 static int wd7000_diagnostics(Adapter * host, int code)
1145 static IcbDiag icb = { ICB_OP_DIAGNOSTICS };
1146 static unchar buf[256];
1147 unsigned long timeout;
1150 any2scsi(icb.len, sizeof(buf));
1151 any2scsi(icb.ptr, (int) &buf);
1154 * This routine is only called at init, so there should be OGMBs
1155 * available. I'm assuming so here. If this is going to
1156 * fail, I can just let the timeout catch the failure.
1158 mail_out(host, (struct scb *) &icb);
1159 timeout = jiffies + WAITnexttimeout; /* wait up to 2 seconds */
1160 while (icb.phase && time_before(jiffies, timeout)) {
1161 cpu_relax(); /* wait for completion */
1166 printk("wd7000_diagnostics: timed out.\n");
1169 if (make_code(icb.vue | (icb.status << 8), 0)) {
1170 printk("wd7000_diagnostics: failed (0x%02x,0x%02x)\n", icb.vue, icb.status);
1178 static int wd7000_adapter_reset(Adapter * host)
1180 InitCmd init_cmd = {
1192 * Reset the adapter - only. The SCSI bus was initialized at power-up,
1193 * and we need to do this just so we control the mailboxes, etc.
1195 outb(ASC_RES, host->iobase + ASC_CONTROL);
1196 udelay(40); /* reset pulse: this is 40us, only need 25us */
1197 outb(0, host->iobase + ASC_CONTROL);
1198 host->control = 0; /* this must always shadow ASC_CONTROL */
1200 if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
1201 printk(KERN_ERR "wd7000_init: WAIT timed out.\n");
1202 return -1; /* -1 = not ok */
1205 if ((diag = inb(host->iobase + ASC_INTR_STAT)) != 1) {
1206 printk("wd7000_init: ");
1210 printk(KERN_ERR "RAM failure.\n");
1213 printk(KERN_ERR "FIFO R/W failed\n");
1216 printk(KERN_ERR "SBIC register R/W failed\n");
1219 printk(KERN_ERR "Initialization D-FF failed.\n");
1222 printk(KERN_ERR "Host IRQ D-FF failed.\n");
1225 printk(KERN_ERR "ROM checksum error.\n");
1228 printk(KERN_ERR "diagnostic code 0x%02Xh received.\n", diag);
1232 /* Clear mailboxes */
1233 memset(&(host->mb), 0, sizeof(host->mb));
1235 /* Execute init command */
1236 any2scsi((unchar *) & (init_cmd.mailboxes), (int) &(host->mb));
1237 if (!command_out(host, (unchar *) & init_cmd, sizeof(init_cmd))) {
1238 printk(KERN_ERR "wd7000_adapter_reset: adapter initialization failed.\n");
1242 if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, ASC_INIT, 0)) {
1243 printk("wd7000_adapter_reset: WAIT timed out.\n");
1249 static int wd7000_init(Adapter * host)
1251 if (wd7000_adapter_reset(host) == -1)
1255 if (request_irq(host->irq, wd7000_intr, IRQF_DISABLED, "wd7000", host)) {
1256 printk("wd7000_init: can't get IRQ %d.\n", host->irq);
1259 if (request_dma(host->dma, "wd7000")) {
1260 printk("wd7000_init: can't get DMA channel %d.\n", host->dma);
1261 free_irq(host->irq, host);
1264 wd7000_enable_dma(host);
1265 wd7000_enable_intr(host);
1267 if (!wd7000_diagnostics(host, ICB_DIAG_FULL)) {
1268 free_dma(host->dma);
1269 free_irq(host->irq, NULL);
1277 static void wd7000_revision(Adapter * host)
1279 static IcbRevLvl icb = { ICB_OP_GET_REVISION };
1283 * Like diagnostics, this is only done at init time, in fact, from
1284 * wd7000_detect, so there should be OGMBs available. If it fails,
1285 * the only damage will be that the revision will show up as 0.0,
1286 * which in turn means that scatter/gather will be disabled.
1288 mail_out(host, (struct scb *) &icb);
1290 cpu_relax(); /* wait for completion */
1293 host->rev1 = icb.primary;
1294 host->rev2 = icb.secondary;
1299 #define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
1301 static int wd7000_set_info(char *buffer, int length, struct Scsi_Host *host)
1303 dprintk("Buffer = <%.*s>, length = %d\n", length, buffer, length);
1306 * Currently this is a no-op
1308 dprintk("Sorry, this function is currently out of order...\n");
1313 static int wd7000_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
1315 Adapter *adapter = (Adapter *)host->hostdata;
1316 unsigned long flags;
1319 Mailbox *ogmbs, *icmbs;
1324 * Has data been written to the file ?
1327 return (wd7000_set_info(buffer, length, host));
1329 spin_lock_irqsave(host->host_lock, flags);
1330 SPRINTF("Host scsi%d: Western Digital WD-7000 (rev %d.%d)\n", host->host_no, adapter->rev1, adapter->rev2);
1331 SPRINTF(" IO base: 0x%x\n", adapter->iobase);
1332 SPRINTF(" IRQ: %d\n", adapter->irq);
1333 SPRINTF(" DMA channel: %d\n", adapter->dma);
1334 SPRINTF(" Interrupts: %d\n", adapter->int_counter);
1335 SPRINTF(" BUS_ON time: %d nanoseconds\n", adapter->bus_on * 125);
1336 SPRINTF(" BUS_OFF time: %d nanoseconds\n", adapter->bus_off * 125);
1339 ogmbs = adapter->mb.ogmb;
1340 icmbs = adapter->mb.icmb;
1342 SPRINTF("\nControl port value: 0x%x\n", adapter->control);
1343 SPRINTF("Incoming mailbox:\n");
1344 SPRINTF(" size: %d\n", ICMB_CNT);
1345 SPRINTF(" queued messages: ");
1347 for (i = count = 0; i < ICMB_CNT; i++)
1348 if (icmbs[i].status) {
1350 SPRINTF("0x%x ", i);
1353 SPRINTF(count ? "\n" : "none\n");
1355 SPRINTF("Outgoing mailbox:\n");
1356 SPRINTF(" size: %d\n", OGMB_CNT);
1357 SPRINTF(" next message: 0x%x\n", adapter->next_ogmb);
1358 SPRINTF(" queued messages: ");
1360 for (i = count = 0; i < OGMB_CNT; i++)
1361 if (ogmbs[i].status) {
1363 SPRINTF("0x%x ", i);
1366 SPRINTF(count ? "\n" : "none\n");
1369 spin_unlock_irqrestore(host->host_lock, flags);
1372 * Calculate start of next buffer, and return value.
1374 *start = buffer + offset;
1376 if ((pos - buffer) < offset)
1378 else if ((pos - buffer - offset) < length)
1379 return (pos - buffer - offset);
1386 * Returns the number of adapters this driver is supporting.
1388 * The source for hosts.c says to wait to call scsi_register until 100%
1389 * sure about an adapter. We need to do it a little sooner here; we
1390 * need the storage set up by scsi_register before wd7000_init, and
1391 * changing the location of an Adapter structure is more trouble than
1392 * calling scsi_unregister.
1396 static __init int wd7000_detect(struct scsi_host_template *tpnt)
1398 short present = 0, biosaddr_ptr, sig_ptr, i, pass;
1399 short biosptr[NUM_CONFIGS];
1401 Adapter *host = NULL;
1402 struct Scsi_Host *sh;
1405 dprintk("wd7000_detect: started\n");
1409 wd7000_setup(wd7000);
1412 for (i = 0; i < UNITS; wd7000_host[i++] = NULL);
1413 for (i = 0; i < NUM_CONFIGS; biosptr[i++] = -1);
1415 tpnt->proc_name = "wd7000";
1416 tpnt->proc_info = &wd7000_proc_info;
1419 * Set up SCB free list, which is shared by all adapters
1423 for (pass = 0; pass < NUM_CONFIGS; pass++) {
1425 * First, search for BIOS SIGNATURE...
1427 for (biosaddr_ptr = 0; biosaddr_ptr < NUM_ADDRS; biosaddr_ptr++)
1428 for (sig_ptr = 0; sig_ptr < NUM_SIGNATURES; sig_ptr++) {
1429 for (i = 0; i < pass; i++)
1430 if (biosptr[i] == biosaddr_ptr)
1434 void __iomem *biosaddr = ioremap(wd7000_biosaddr[biosaddr_ptr] + signatures[sig_ptr].ofs,
1435 signatures[sig_ptr].len);
1436 short bios_match = 1;
1439 bios_match = check_signature(biosaddr, signatures[sig_ptr].sig, signatures[sig_ptr].len);
1450 * BIOS SIGNATURE has been found.
1453 dprintk("wd7000_detect: pass %d\n", pass + 1);
1455 if (biosaddr_ptr == NUM_ADDRS)
1456 dprintk("WD-7000 SST BIOS not detected...\n");
1458 dprintk("WD-7000 SST BIOS detected at 0x%lx: checking...\n", wd7000_biosaddr[biosaddr_ptr]);
1461 if (configs[pass].irq < 0)
1467 iobase = configs[pass].iobase;
1469 dprintk("wd7000_detect: check IO 0x%x region...\n", iobase);
1471 if (request_region(iobase, 4, "wd7000")) {
1473 dprintk("wd7000_detect: ASC reset (IO 0x%x) ...", iobase);
1477 outb(ASC_RES, iobase + ASC_CONTROL);
1479 outb(0, iobase + ASC_CONTROL);
1481 if (WAIT(iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
1482 dprintk("failed!\n");
1487 if (inb(iobase + ASC_INTR_STAT) == 1) {
1489 * We register here, to get a pointer to the extra space,
1490 * which we'll use as the Adapter structure (host) for
1491 * this adapter. It is located just after the registered
1492 * Scsi_Host structure (sh), and is located by the empty
1495 sh = scsi_register(tpnt, sizeof(Adapter));
1499 host = (Adapter *) sh->hostdata;
1501 dprintk("wd7000_detect: adapter allocated at 0x%x\n", (int) host);
1502 memset(host, 0, sizeof(Adapter));
1504 host->irq = configs[pass].irq;
1505 host->dma = configs[pass].dma;
1506 host->iobase = iobase;
1507 host->int_counter = 0;
1508 host->bus_on = configs[pass].bus_on;
1509 host->bus_off = configs[pass].bus_off;
1510 host->sh = wd7000_host[unit] = sh;
1513 dprintk("wd7000_detect: Trying init WD-7000 card at IO " "0x%x, IRQ %d, DMA %d...\n", host->iobase, host->irq, host->dma);
1515 if (!wd7000_init(host)) /* Initialization failed */
1516 goto err_unregister;
1519 * OK from here - we'll use this adapter/configuration.
1521 wd7000_revision(host); /* important for scatter/gather */
1524 * For boards before rev 6.0, scatter/gather isn't supported.
1527 sh->sg_tablesize = 1;
1529 present++; /* count it */
1531 if (biosaddr_ptr != NUM_ADDRS)
1532 biosptr[pass] = biosaddr_ptr;
1534 printk(KERN_INFO "Western Digital WD-7000 (rev %d.%d) ", host->rev1, host->rev2);
1535 printk("using IO 0x%x, IRQ %d, DMA %d.\n", host->iobase, host->irq, host->dma);
1536 printk(" BUS_ON time: %dns, BUS_OFF time: %dns\n", host->bus_on * 125, host->bus_off * 125);
1539 dprintk("wd7000_detect: IO 0x%x region already allocated!\n", iobase);
1544 scsi_unregister(sh);
1546 release_region(iobase, 4);
1551 printk("Failed initialization of WD-7000 SCSI card!\n");
1556 static int wd7000_release(struct Scsi_Host *shost)
1559 free_irq(shost->irq, NULL);
1560 if (shost->io_port && shost->n_io_port)
1561 release_region(shost->io_port, shost->n_io_port);
1562 scsi_unregister(shost);
1568 * I have absolutely NO idea how to do an abort with the WD7000...
1570 static int wd7000_abort(Scsi_Cmnd * SCpnt)
1572 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1574 if (inb(host->iobase + ASC_STAT) & INT_IM) {
1575 printk("wd7000_abort: lost interrupt\n");
1576 wd7000_intr_handle(host->irq, NULL, NULL);
1584 * Last resort. Reinitialize the board.
1587 static int wd7000_host_reset(struct scsi_cmnd *SCpnt)
1589 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1591 spin_lock_irq(SCpnt->device->host->host_lock);
1593 if (wd7000_adapter_reset(host) < 0) {
1594 spin_unlock_irq(SCpnt->device->host->host_lock);
1598 wd7000_enable_intr(host);
1600 spin_unlock_irq(SCpnt->device->host->host_lock);
1605 * This was borrowed directly from aha1542.c. (Zaga)
1608 static int wd7000_biosparam(struct scsi_device *sdev,
1609 struct block_device *bdev, sector_t capacity, int *ip)
1611 char b[BDEVNAME_SIZE];
1613 dprintk("wd7000_biosparam: dev=%s, size=%d, ",
1614 bdevname(bdev, b), capacity);
1615 (void)b; /* unused var warning? */
1618 * try default translation
1622 ip[2] = capacity >> 11;
1625 * for disks >1GB do some guessing
1627 if (ip[2] >= 1024) {
1631 * try to figure out the geometry from the partition table
1633 if ((scsicam_bios_param(bdev, capacity, info) < 0) || !(((info[0] == 64) && (info[1] == 32)) || ((info[0] == 255) && (info[1] == 63)))) {
1634 printk("wd7000_biosparam: unable to verify geometry for disk with >1GB.\n" " using extended translation.\n");
1638 ip[2] = (unsigned long) capacity / (255 * 63);
1645 printk(KERN_INFO "%s: current partition table is " "using extended translation.\n", __func__);
1649 dprintk("bios geometry: head=%d, sec=%d, cyl=%d\n", ip[0], ip[1], ip[2]);
1650 dprintk("WARNING: check, if the bios geometry is correct.\n");
1655 MODULE_AUTHOR("Thomas Wuensche, John Boyd, Miroslav Zagorac");
1656 MODULE_DESCRIPTION("Driver for the WD7000 series ISA controllers");
1657 MODULE_LICENSE("GPL");
1659 static struct scsi_host_template driver_template = {
1660 .proc_name = "wd7000",
1661 .proc_info = wd7000_proc_info,
1662 .name = "Western Digital WD-7000",
1663 .detect = wd7000_detect,
1664 .release = wd7000_release,
1665 .queuecommand = wd7000_queuecommand,
1666 .eh_host_reset_handler = wd7000_host_reset,
1667 .bios_param = wd7000_biosparam,
1668 .can_queue = WD7000_Q,
1670 .sg_tablesize = WD7000_SG,
1672 .unchecked_isa_dma = 1,
1673 .use_clustering = ENABLE_CLUSTERING,
1676 #include "scsi_module.c"