1 /* $Id: $
2 * linux/drivers/scsi/wd7000.c
3 *
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 :-) )
7 *
8 * Revised (and renamed) by John Boyd <boyd@cis.ohio-state.edu> to
9 * accommodate Eric Youngdale's modifications to scsi.c. Nov 1992.
10 *
11 * Additional changes to support scatter/gather. Dec. 1992. tw/jb
12 *
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
18 *
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
24 * following:
25 *
26 * Standard configuration for single-adapter systems:
27 * - BIOS at CE00h
28 * - I/O base address 350h
29 * - IRQ level 15
30 * - DMA channel 6
31 * Standard configuration for a second adapter in a system:
32 * - BIOS at C800h
33 * - I/O base address 330h
34 * - IRQ level 11
35 * - DMA channel 5
36 *
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.
42 *
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
53 * destructive.
54 *
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...
58 *
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):
64 *
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
69 * Linux.
70 *
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.
80 *
81 * WD7000-AX:
82 * WD7000-MX:
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
87 * EISA bus board.
88 *
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.
93 *
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
99 * for it.
100 * J.B. Jan 1994.
101 *
102 *
103 * Revisions by Miroslav Zagorac <zaga@fly.cc.fer.hr>
104 *
105 * 08/24/1996.
106 *
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,
114 * as in lilo.conf:
115 *
116 * append="wd7000=IRQ,DMA,IO"
117 *
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^)
121 *
122 *
123 * 09/06/1996.
124 *
125 * Autodetecting of I/O base address from wd7000_detect function is removed,
126 * some little bugs removed, etc...
127 *
128 * Thanks to Roger Scott for driver debugging.
129 *
130 * 06/07/1997
131 *
132 * Added support for /proc file system (/proc/scsi/wd7000/[0...] files).
133 * Now, driver can handle hard disks with capacity >1GB.
134 *
135 * 01/15/1998
136 *
137 * Added support for BUS_ON and BUS_OFF parameters in config line.
138 * Miscellaneous cleanup.
139 *
140 * 03/01/1998
141 *
142 * WD7000 driver now work on kernels >= 2.1.x
143 *
144 *
145 * 12/31/2001 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
146 *
147 * use host->host_lock, not io_request_lock, cleanups
148 *
149 * 2002/10/04 - Alan Cox <alan@redhat.com>
150 *
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
154 *
155 * 2002/10/06 - Alan Cox <alan@redhat.com>
156 *
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
161 *
162 * 2003/02/12 - Christoph Hellwig <hch@infradead.org>
163 *
164 * Cleaned up host template defintion
165 * Removed now obsolete wd7000.h
166 */
167
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>
181 #include <linux/io.h>
182
183 #include <asm/system.h>
184 #include <asm/dma.h>
185
186 #include <scsi/scsi.h>
187 #include <scsi/scsi_cmnd.h>
188 #include <scsi/scsi_device.h>
189 #include <scsi/scsi_host.h>
190 #include <scsi/scsicam.h>
191
192
193 #undef WD7000_DEBUG /* general debug */
194 #ifdef WD7000_DEBUG
195 #define dprintk printk
196 #else
197 #define dprintk(format,args...)
198 #endif
199
200 /*
201 * Mailbox structure sizes.
202 * I prefer to keep the number of ICMBs much larger than the number of
203 * OGMBs. OGMBs are used very quickly by the driver to start one or
204 * more commands, while ICMBs are used by the host adapter per command.
205 */
206 #define OGMB_CNT 16
207 #define ICMB_CNT 32
208
209 /*
210 * Scb's are shared by all active adapters. So, if they all become busy,
211 * callers may be made to wait in alloc_scbs for them to free. That can
212 * be avoided by setting MAX_SCBS to NUM_CONFIG * WD7000_Q. If you'd
213 * rather conserve memory, use a smaller number (> 0, of course) - things
214 * will should still work OK.
215 */
216 #define MAX_SCBS 32
217
218 /*
219 * In this version, sg_tablesize now defaults to WD7000_SG, and will
220 * be set to SG_NONE for older boards. This is the reverse of the
221 * previous default, and was changed so that the driver-level
222 * scsi_host_template would reflect the driver's support for scatter/
223 * gather.
224 *
225 * Also, it has been reported that boards at Revision 6 support scatter/
226 * gather, so the new definition of an "older" board has been changed
227 * accordingly.
228 */
229 #define WD7000_Q 16
230 #define WD7000_SG 16
231
232
233 /*
234 * WD7000-specific mailbox structure
235 *
236 */
237 typedef volatile struct mailbox {
238 unchar status;
239 unchar scbptr[3]; /* SCSI-style - MSB first (big endian) */
240 } Mailbox;
241
242 /*
243 * This structure should contain all per-adapter global data. I.e., any
244 * new global per-adapter data should put in here.
245 */
246 typedef struct adapter {
247 struct Scsi_Host *sh; /* Pointer to Scsi_Host structure */
248 int iobase; /* This adapter's I/O base address */
249 int irq; /* This adapter's IRQ level */
250 int dma; /* This adapter's DMA channel */
251 int int_counter; /* This adapter's interrupt counter */
252 int bus_on; /* This adapter's BUS_ON time */
253 int bus_off; /* This adapter's BUS_OFF time */
254 struct { /* This adapter's mailboxes */
255 Mailbox ogmb[OGMB_CNT]; /* Outgoing mailboxes */
256 Mailbox icmb[ICMB_CNT]; /* Incoming mailboxes */
257 } mb;
258 int next_ogmb; /* to reduce contention at mailboxes */
259 unchar control; /* shadows CONTROL port value */
260 unchar rev1, rev2; /* filled in by wd7000_revision */
261 } Adapter;
262
263 /*
264 * (linear) base address for ROM BIOS
265 */
266 static const long wd7000_biosaddr[] = {
267 0xc0000, 0xc2000, 0xc4000, 0xc6000, 0xc8000, 0xca000, 0xcc000, 0xce000,
268 0xd0000, 0xd2000, 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0xde000
269 };
270 #define NUM_ADDRS ARRAY_SIZE(wd7000_biosaddr)
271
272 static const unsigned short wd7000_iobase[] = {
273 0x0300, 0x0308, 0x0310, 0x0318, 0x0320, 0x0328, 0x0330, 0x0338,
274 0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370, 0x0378,
275 0x0380, 0x0388, 0x0390, 0x0398, 0x03a0, 0x03a8, 0x03b0, 0x03b8,
276 0x03c0, 0x03c8, 0x03d0, 0x03d8, 0x03e0, 0x03e8, 0x03f0, 0x03f8
277 };
278 #define NUM_IOPORTS ARRAY_SIZE(wd7000_iobase)
279
280 static const short wd7000_irq[] = { 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 };
281 #define NUM_IRQS ARRAY_SIZE(wd7000_irq)
282
283 static const short wd7000_dma[] = { 5, 6, 7 };
284 #define NUM_DMAS ARRAY_SIZE(wd7000_dma)
285
286 /*
287 * The following is set up by wd7000_detect, and used thereafter for
288 * proc and other global ookups
289 */
290
291 #define UNITS 8
292 static struct Scsi_Host *wd7000_host[UNITS];
293
294 #define BUS_ON 64 /* x 125ns = 8000ns (BIOS default) */
295 #define BUS_OFF 15 /* x 125ns = 1875ns (BIOS default) */
296
297 /*
298 * Standard Adapter Configurations - used by wd7000_detect
299 */
300 typedef struct {
301 short irq; /* IRQ level */
302 short dma; /* DMA channel */
303 unsigned iobase; /* I/O base address */
304 short bus_on; /* Time that WD7000 spends on the AT-bus when */
305 /* transferring data. BIOS default is 8000ns. */
306 short bus_off; /* Time that WD7000 spends OFF THE BUS after */
307 /* while it is transferring data. */
308 /* BIOS default is 1875ns */
309 } Config;
310
311 /*
312 * Add here your configuration...
313 */
314 static Config configs[] = {
315 {15, 6, 0x350, BUS_ON, BUS_OFF}, /* defaults for single adapter */
316 {11, 5, 0x320, BUS_ON, BUS_OFF}, /* defaults for second adapter */
317 {7, 6, 0x350, BUS_ON, BUS_OFF}, /* My configuration (Zaga) */
318 {-1, -1, 0x0, BUS_ON, BUS_OFF} /* Empty slot */
319 };
320 #define NUM_CONFIGS ARRAY_SIZE(configs)
321
322 /*
323 * The following list defines strings to look for in the BIOS that identify
324 * it as the WD7000-FASST2 SST BIOS. I suspect that something should be
325 * added for the Future Domain version.
326 */
327 typedef struct signature {
328 const char *sig; /* String to look for */
329 unsigned long ofs; /* offset from BIOS base address */
330 unsigned len; /* length of string */
331 } Signature;
332
333 static const Signature signatures[] = {
334 {"SSTBIOS", 0x0000d, 7} /* "SSTBIOS" @ offset 0x0000d */
335 };
336 #define NUM_SIGNATURES ARRAY_SIZE(signatures)
337
338
339 /*
340 * I/O Port Offsets and Bit Definitions
341 * 4 addresses are used. Those not defined here are reserved.
342 */
343 #define ASC_STAT 0 /* Status, Read */
344 #define ASC_COMMAND 0 /* Command, Write */
345 #define ASC_INTR_STAT 1 /* Interrupt Status, Read */
346 #define ASC_INTR_ACK 1 /* Acknowledge, Write */
347 #define ASC_CONTROL 2 /* Control, Write */
348
349 /*
350 * ASC Status Port
351 */
352 #define INT_IM 0x80 /* Interrupt Image Flag */
353 #define CMD_RDY 0x40 /* Command Port Ready */
354 #define CMD_REJ 0x20 /* Command Port Byte Rejected */
355 #define ASC_INIT 0x10 /* ASC Initialized Flag */
356 #define ASC_STATMASK 0xf0 /* The lower 4 Bytes are reserved */
357
358 /*
359 * COMMAND opcodes
360 *
361 * Unfortunately, I have no idea how to properly use some of these commands,
362 * as the OEM manual does not make it clear. I have not been able to use
363 * enable/disable unsolicited interrupts or the reset commands with any
364 * discernible effect whatsoever. I think they may be related to certain
365 * ICB commands, but again, the OEM manual doesn't make that clear.
366 */
367 #define NO_OP 0 /* NO-OP toggles CMD_RDY bit in ASC_STAT */
368 #define INITIALIZATION 1 /* initialization (10 bytes) */
369 #define DISABLE_UNS_INTR 2 /* disable unsolicited interrupts */
370 #define ENABLE_UNS_INTR 3 /* enable unsolicited interrupts */
371 #define INTR_ON_FREE_OGMB 4 /* interrupt on free OGMB */
372 #define SOFT_RESET 5 /* SCSI bus soft reset */
373 #define HARD_RESET_ACK 6 /* SCSI bus hard reset acknowledge */
374 #define START_OGMB 0x80 /* start command in OGMB (n) */
375 #define SCAN_OGMBS 0xc0 /* start multiple commands, signature (n) */
376 /* where (n) = lower 6 bits */
377 /*
378 * For INITIALIZATION:
379 */
380 typedef struct initCmd {
381 unchar op; /* command opcode (= 1) */
382 unchar ID; /* Adapter's SCSI ID */
383 unchar bus_on; /* Bus on time, x 125ns (see below) */
384 unchar bus_off; /* Bus off time, "" "" */
385 unchar rsvd; /* Reserved */
386 unchar mailboxes[3]; /* Address of Mailboxes, MSB first */
387 unchar ogmbs; /* Number of outgoing MBs, max 64, 0,1 = 1 */
388 unchar icmbs; /* Number of incoming MBs, "" "" */
389 } InitCmd;
390
391 /*
392 * Interrupt Status Port - also returns diagnostic codes at ASC reset
393 *
394 * if msb is zero, the lower bits are diagnostic status
395 * Diagnostics:
396 * 01 No diagnostic error occurred
397 * 02 RAM failure
398 * 03 FIFO R/W failed
399 * 04 SBIC register read/write failed
400 * 05 Initialization D-FF failed
401 * 06 Host IRQ D-FF failed
402 * 07 ROM checksum error
403 * Interrupt status (bitwise):
404 * 10NNNNNN outgoing mailbox NNNNNN is free
405 * 11NNNNNN incoming mailbox NNNNNN needs service
406 */
407 #define MB_INTR 0xC0 /* Mailbox Service possible/required */
408 #define IMB_INTR 0x40 /* 1 Incoming / 0 Outgoing */
409 #define MB_MASK 0x3f /* mask for mailbox number */
410
411 /*
412 * CONTROL port bits
413 */
414 #define INT_EN 0x08 /* Interrupt Enable */
415 #define DMA_EN 0x04 /* DMA Enable */
416 #define SCSI_RES 0x02 /* SCSI Reset */
417 #define ASC_RES 0x01 /* ASC Reset */
418
419 /*
420 * Driver data structures:
421 * - mb and scbs are required for interfacing with the host adapter.
422 * An SCB has extra fields not visible to the adapter; mb's
423 * _cannot_ do this, since the adapter assumes they are contiguous in
424 * memory, 4 bytes each, with ICMBs following OGMBs, and uses this fact
425 * to access them.
426 * - An icb is for host-only (non-SCSI) commands. ICBs are 16 bytes each;
427 * the additional bytes are used only by the driver.
428 * - For now, a pool of SCBs are kept in global storage by this driver,
429 * and are allocated and freed as needed.
430 *
431 * The 7000-FASST2 marks OGMBs empty as soon as it has _started_ a command,
432 * not when it has finished. Since the SCB must be around for completion,
433 * problems arise when SCBs correspond to OGMBs, which may be reallocated
434 * earlier (or delayed unnecessarily until a command completes).
435 * Mailboxes are used as transient data structures, simply for
436 * carrying SCB addresses to/from the 7000-FASST2.
437 *
438 * Note also since SCBs are not "permanently" associated with mailboxes,
439 * there is no need to keep a global list of scsi_cmnd pointers indexed
440 * by OGMB. Again, SCBs reference their scsi_cmnds directly, so mailbox
441 * indices need not be involved.
442 */
443
444 /*
445 * WD7000-specific scatter/gather element structure
446 */
447 typedef struct sgb {
448 unchar len[3];
449 unchar ptr[3]; /* Also SCSI-style - MSB first */
450 } Sgb;
451
452 typedef struct scb { /* Command Control Block 5.4.1 */
453 unchar op; /* Command Control Block Operation Code */
454 unchar idlun; /* op=0,2:Target Id, op=1:Initiator Id */
455 /* Outbound data transfer, length is checked */
456 /* Inbound data transfer, length is checked */
457 /* Logical Unit Number */
458 unchar cdb[12]; /* SCSI Command Block */
459 volatile unchar status; /* SCSI Return Status */
460 volatile unchar vue; /* Vendor Unique Error Code */
461 unchar maxlen[3]; /* Maximum Data Transfer Length */
462 unchar dataptr[3]; /* SCSI Data Block Pointer */
463 unchar linkptr[3]; /* Next Command Link Pointer */
464 unchar direc; /* Transfer Direction */
465 unchar reserved2[6]; /* SCSI Command Descriptor Block */
466 /* end of hardware SCB */
467 struct scsi_cmnd *SCpnt;/* scsi_cmnd using this SCB */
468 Sgb sgb[WD7000_SG]; /* Scatter/gather list for this SCB */
469 Adapter *host; /* host adapter */
470 struct scb *next; /* for lists of scbs */
471 } Scb;
472
473 /*
474 * This driver is written to allow host-only commands to be executed.
475 * These use a 16-byte block called an ICB. The format is extended by the
476 * driver to 18 bytes, to support the status returned in the ICMB and
477 * an execution phase code.
478 *
479 * There are other formats besides these; these are the ones I've tried
480 * to use. Formats for some of the defined ICB opcodes are not defined
481 * (notably, get/set unsolicited interrupt status) in my copy of the OEM
482 * manual, and others are ambiguous/hard to follow.
483 */
484 #define ICB_OP_MASK 0x80 /* distinguishes scbs from icbs */
485 #define ICB_OP_OPEN_RBUF 0x80 /* open receive buffer */
486 #define ICB_OP_RECV_CMD 0x81 /* receive command from initiator */
487 #define ICB_OP_RECV_DATA 0x82 /* receive data from initiator */
488 #define ICB_OP_RECV_SDATA 0x83 /* receive data with status from init. */
489 #define ICB_OP_SEND_DATA 0x84 /* send data with status to initiator */
490 #define ICB_OP_SEND_STAT 0x86 /* send command status to initiator */
491 /* 0x87 is reserved */
492 #define ICB_OP_READ_INIT 0x88 /* read initialization bytes */
493 #define ICB_OP_READ_ID 0x89 /* read adapter's SCSI ID */
494 #define ICB_OP_SET_UMASK 0x8A /* set unsolicited interrupt mask */
495 #define ICB_OP_GET_UMASK 0x8B /* read unsolicited interrupt mask */
496 #define ICB_OP_GET_REVISION 0x8C /* read firmware revision level */
497 #define ICB_OP_DIAGNOSTICS 0x8D /* execute diagnostics */
498 #define ICB_OP_SET_EPARMS 0x8E /* set execution parameters */
499 #define ICB_OP_GET_EPARMS 0x8F /* read execution parameters */
500
501 typedef struct icbRecvCmd {
502 unchar op;
503 unchar IDlun; /* Initiator SCSI ID/lun */
504 unchar len[3]; /* command buffer length */
505 unchar ptr[3]; /* command buffer address */
506 unchar rsvd[7]; /* reserved */
507 volatile unchar vue; /* vendor-unique error code */
508 volatile unchar status; /* returned (icmb) status */
509 volatile unchar phase; /* used by interrupt handler */
510 } IcbRecvCmd;
511
512 typedef struct icbSendStat {
513 unchar op;
514 unchar IDlun; /* Target SCSI ID/lun */
515 unchar stat; /* (outgoing) completion status byte 1 */
516 unchar rsvd[12]; /* reserved */
517 volatile unchar vue; /* vendor-unique error code */
518 volatile unchar status; /* returned (icmb) status */
519 volatile unchar phase; /* used by interrupt handler */
520 } IcbSendStat;
521
522 typedef struct icbRevLvl {
523 unchar op;
524 volatile unchar primary; /* primary revision level (returned) */
525 volatile unchar secondary; /* secondary revision level (returned) */
526 unchar rsvd[12]; /* reserved */
527 volatile unchar vue; /* vendor-unique error code */
528 volatile unchar status; /* returned (icmb) status */
529 volatile unchar phase; /* used by interrupt handler */
530 } IcbRevLvl;
531
532 typedef struct icbUnsMask { /* I'm totally guessing here */
533 unchar op;
534 volatile unchar mask[14]; /* mask bits */
535 #if 0
536 unchar rsvd[12]; /* reserved */
537 #endif
538 volatile unchar vue; /* vendor-unique error code */
539 volatile unchar status; /* returned (icmb) status */
540 volatile unchar phase; /* used by interrupt handler */
541 } IcbUnsMask;
542
543 typedef struct icbDiag {
544 unchar op;
545 unchar type; /* diagnostics type code (0-3) */
546 unchar len[3]; /* buffer length */
547 unchar ptr[3]; /* buffer address */
548 unchar rsvd[7]; /* reserved */
549 volatile unchar vue; /* vendor-unique error code */
550 volatile unchar status; /* returned (icmb) status */
551 volatile unchar phase; /* used by interrupt handler */
552 } IcbDiag;
553
554 #define ICB_DIAG_POWERUP 0 /* Power-up diags only */
555 #define ICB_DIAG_WALKING 1 /* walking 1's pattern */
556 #define ICB_DIAG_DMA 2 /* DMA - system memory diags */
557 #define ICB_DIAG_FULL 3 /* do both 1 & 2 */
558
559 typedef struct icbParms {
560 unchar op;
561 unchar rsvd1; /* reserved */
562 unchar len[3]; /* parms buffer length */
563 unchar ptr[3]; /* parms buffer address */
564 unchar idx[2]; /* index (MSB-LSB) */
565 unchar rsvd2[5]; /* reserved */
566 volatile unchar vue; /* vendor-unique error code */
567 volatile unchar status; /* returned (icmb) status */
568 volatile unchar phase; /* used by interrupt handler */
569 } IcbParms;
570
571 typedef struct icbAny {
572 unchar op;
573 unchar data[14]; /* format-specific data */
574 volatile unchar vue; /* vendor-unique error code */
575 volatile unchar status; /* returned (icmb) status */
576 volatile unchar phase; /* used by interrupt handler */
577 } IcbAny;
578
579 typedef union icb {
580 unchar op; /* ICB opcode */
581 IcbRecvCmd recv_cmd; /* format for receive command */
582 IcbSendStat send_stat; /* format for send status */
583 IcbRevLvl rev_lvl; /* format for get revision level */
584 IcbDiag diag; /* format for execute diagnostics */
585 IcbParms eparms; /* format for get/set exec parms */
586 IcbAny icb; /* generic format */
587 unchar data[18];
588 } Icb;
589
590 #ifdef MODULE
591 static char *wd7000;
592 module_param(wd7000, charp, 0);
593 #endif
594
595 /*
596 * Driver SCB structure pool.
597 *
598 * The SCBs declared here are shared by all host adapters; hence, this
599 * structure is not part of the Adapter structure.
600 */
601 static Scb scbs[MAX_SCBS];
602 static Scb *scbfree; /* free list */
603 static int freescbs = MAX_SCBS; /* free list counter */
604 static spinlock_t scbpool_lock; /* guards the scb free list and count */
605
606 /*
607 * END of data/declarations - code follows.
608 */
609 static void __init setup_error(char *mesg, int *ints)
610 {
611 if (ints[0] == 3)
612 printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x\" -> %s\n", ints[1], ints[2], ints[3], mesg);
613 else if (ints[0] == 4)
614 printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], mesg);
615 else
616 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);
617 }
618
619
620 /*
621 * Note: You can now set these options from the kernel's "command line".
622 * The syntax is:
623 *
624 * wd7000=<IRQ>,<DMA>,<IO>[,<BUS_ON>[,<BUS_OFF>]]
625 *
626 * , where BUS_ON and BUS_OFF are in nanoseconds. BIOS default values
627 * are 8000ns for BUS_ON and 1875ns for BUS_OFF.
628 * eg:
629 * wd7000=7,6,0x350
630 *
631 * will configure the driver for a WD-7000 controller
632 * using IRQ 15 with a DMA channel 6, at IO base address 0x350.
633 */
634 static int __init wd7000_setup(char *str)
635 {
636 static short wd7000_card_num; /* .bss will zero this */
637 short i;
638 int ints[6];
639
640 (void) get_options(str, ARRAY_SIZE(ints), ints);
641
642 if (wd7000_card_num >= NUM_CONFIGS) {
643 printk(KERN_ERR "%s: Too many \"wd7000=\" configurations in " "command line!\n", __FUNCTION__);
644 return 0;
645 }
646
647 if ((ints[0] < 3) || (ints[0] > 5)) {
648 printk(KERN_ERR "%s: Error in command line! " "Usage: wd7000=<IRQ>,<DMA>,IO>[,<BUS_ON>" "[,<BUS_OFF>]]\n", __FUNCTION__);
649 } else {
650 for (i = 0; i < NUM_IRQS; i++)
651 if (ints[1] == wd7000_irq[i])
652 break;
653
654 if (i == NUM_IRQS) {
655 setup_error("invalid IRQ.", ints);
656 return 0;
657 } else
658 configs[wd7000_card_num].irq = ints[1];
659
660 for (i = 0; i < NUM_DMAS; i++)
661 if (ints[2] == wd7000_dma[i])
662 break;
663
664 if (i == NUM_DMAS) {
665 setup_error("invalid DMA channel.", ints);
666 return 0;
667 } else
668 configs[wd7000_card_num].dma = ints[2];
669
670 for (i = 0; i < NUM_IOPORTS; i++)
671 if (ints[3] == wd7000_iobase[i])
672 break;
673
674 if (i == NUM_IOPORTS) {
675 setup_error("invalid I/O base address.", ints);
676 return 0;
677 } else
678 configs[wd7000_card_num].iobase = ints[3];
679
680 if (ints[0] > 3) {
681 if ((ints[4] < 500) || (ints[4] > 31875)) {
682 setup_error("BUS_ON value is out of range (500" " to 31875 nanoseconds)!", ints);
683 configs[wd7000_card_num].bus_on = BUS_ON;
684 } else
685 configs[wd7000_card_num].bus_on = ints[4] / 125;
686 } else
687 configs[wd7000_card_num].bus_on = BUS_ON;
688
689 if (ints[0] > 4) {
690 if ((ints[5] < 500) || (ints[5] > 31875)) {
691 setup_error("BUS_OFF value is out of range (500" " to 31875 nanoseconds)!", ints);
692 configs[wd7000_card_num].bus_off = BUS_OFF;
693 } else
694 configs[wd7000_card_num].bus_off = ints[5] / 125;
695 } else
696 configs[wd7000_card_num].bus_off = BUS_OFF;
697
698 if (wd7000_card_num) {
699 for (i = 0; i < (wd7000_card_num - 1); i++) {
700 int j = i + 1;
701
702 for (; j < wd7000_card_num; j++)
703 if (configs[i].irq == configs[j].irq) {
704 setup_error("duplicated IRQ!", ints);
705 return 0;
706 }
707 if (configs[i].dma == configs[j].dma) {
708 setup_error("duplicated DMA " "channel!", ints);
709 return 0;
710 }
711 if (configs[i].iobase == configs[j].iobase) {
712 setup_error("duplicated I/O " "base address!", ints);
713 return 0;
714 }
715 }
716 }
717
718 dprintk(KERN_DEBUG "wd7000_setup: IRQ=%d, DMA=%d, I/O=0x%x, "
719 "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);
720
721 wd7000_card_num++;
722 }
723 return 1;
724 }
725
726 __setup("wd7000=", wd7000_setup);
727
728 static inline void any2scsi(unchar * scsi, int any)
729 {
730 *scsi++ = (unsigned)any >> 16;
731 *scsi++ = (unsigned)any >> 8;
732 *scsi++ = any;
733 }
734
735 static inline int scsi2int(unchar * scsi)
736 {
737 return (scsi[0] << 16) | (scsi[1] << 8) | scsi[2];
738 }
739
740 static inline void wd7000_enable_intr(Adapter * host)
741 {
742 host->control |= INT_EN;
743 outb(host->control, host->iobase + ASC_CONTROL);
744 }
745
746
747 static inline void wd7000_enable_dma(Adapter * host)
748 {
749 unsigned long flags;
750 host->control |= DMA_EN;
751 outb(host->control, host->iobase + ASC_CONTROL);
752
753 flags = claim_dma_lock();
754 set_dma_mode(host->dma, DMA_MODE_CASCADE);
755 enable_dma(host->dma);
756 release_dma_lock(flags);
757
758 }
759
760
761 #define WAITnexttimeout 200 /* 2 seconds */
762
763 static inline short WAIT(unsigned port, unsigned mask, unsigned allof, unsigned noneof)
764 {
765 unsigned WAITbits;
766 unsigned long WAITtimeout = jiffies + WAITnexttimeout;
767
768 while (time_before_eq(jiffies, WAITtimeout)) {
769 WAITbits = inb(port) & mask;
770
771 if (((WAITbits & allof) == allof) && ((WAITbits & noneof) == 0))
772 return (0);
773 }
774
775 return (1);
776 }
777
778
779 static inline int command_out(Adapter * host, unchar * cmd, int len)
780 {
781 if (!WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
782 while (len--) {
783 do {
784 outb(*cmd, host->iobase + ASC_COMMAND);
785 WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0);
786 } while (inb(host->iobase + ASC_STAT) & CMD_REJ);
787
788 cmd++;
789 }
790
791 return (1);
792 }
793
794 printk(KERN_WARNING "wd7000 command_out: WAIT failed(%d)\n", len + 1);
795
796 return (0);
797 }
798
799
800 /*
801 * This version of alloc_scbs is in preparation for supporting multiple
802 * commands per lun and command chaining, by queueing pending commands.
803 * We will need to allocate Scbs in blocks since they will wait to be
804 * executed so there is the possibility of deadlock otherwise.
805 * Also, to keep larger requests from being starved by smaller requests,
806 * we limit access to this routine with an internal busy flag, so that
807 * the satisfiability of a request is not dependent on the size of the
808 * request.
809 */
810 static inline Scb *alloc_scbs(struct Scsi_Host *host, int needed)
811 {
812 Scb *scb, *p = NULL;
813 unsigned long flags;
814 unsigned long timeout = jiffies + WAITnexttimeout;
815 unsigned long now;
816 int i;
817
818 if (needed <= 0)
819 return (NULL); /* sanity check */
820
821 spin_unlock_irq(host->host_lock);
822
823 retry:
824 while (freescbs < needed) {
825 timeout = jiffies + WAITnexttimeout;
826 do {
827 /* FIXME: can we actually just yield here ?? */
828 for (now = jiffies; now == jiffies;)
829 cpu_relax(); /* wait a jiffy */
830 } while (freescbs < needed && time_before_eq(jiffies, timeout));
831 /*
832 * If we get here with enough free Scbs, we can take them.
833 * Otherwise, we timed out and didn't get enough.
834 */
835 if (freescbs < needed) {
836 printk(KERN_ERR "wd7000: can't get enough free SCBs.\n");
837 return (NULL);
838 }
839 }
840
841 /* Take the lock, then check we didnt get beaten, if so try again */
842 spin_lock_irqsave(&scbpool_lock, flags);
843 if (freescbs < needed) {
844 spin_unlock_irqrestore(&scbpool_lock, flags);
845 goto retry;
846 }
847
848 scb = scbfree;
849 freescbs -= needed;
850 for (i = 0; i < needed; i++) {
851 p = scbfree;
852 scbfree = p->next;
853 }
854 p->next = NULL;
855
856 spin_unlock_irqrestore(&scbpool_lock, flags);
857
858 spin_lock_irq(host->host_lock);
859 return (scb);
860 }
861
862
863 static inline void free_scb(Scb * scb)
864 {
865 unsigned long flags;
866
867 spin_lock_irqsave(&scbpool_lock, flags);
868
869 memset(scb, 0, sizeof(Scb));
870 scb->next = scbfree;
871 scbfree = scb;
872 freescbs++;
873
874 spin_unlock_irqrestore(&scbpool_lock, flags);
875 }
876
877
878 static inline void init_scbs(void)
879 {
880 int i;
881
882 spin_lock_init(&scbpool_lock);
883
884 /* This is only ever called before the SCB pool is active */
885
886 scbfree = &(scbs[0]);
887 memset(scbs, 0, sizeof(scbs));
888 for (i = 0; i < MAX_SCBS - 1; i++) {
889 scbs[i].next = &(scbs[i + 1]);
890 scbs[i].SCpnt = NULL;
891 }
892 scbs[MAX_SCBS - 1].next = NULL;
893 scbs[MAX_SCBS - 1].SCpnt = NULL;
894 }
895
896
897 static int mail_out(Adapter * host, Scb * scbptr)
898 /*
899 * Note: this can also be used for ICBs; just cast to the parm type.
900 */
901 {
902 int i, ogmb;
903 unsigned long flags;
904 unchar start_ogmb;
905 Mailbox *ogmbs = host->mb.ogmb;
906 int *next_ogmb = &(host->next_ogmb);
907
908 dprintk("wd7000_mail_out: 0x%06lx", (long) scbptr);
909
910 /* We first look for a free outgoing mailbox */
911 spin_lock_irqsave(host->sh->host_lock, flags);
912 ogmb = *next_ogmb;
913 for (i = 0; i < OGMB_CNT; i++) {
914 if (ogmbs[ogmb].status == 0) {
915 dprintk(" using OGMB 0x%x", ogmb);
916 ogmbs[ogmb].status = 1;
917 any2scsi((unchar *) ogmbs[ogmb].scbptr, (int) scbptr);
918
919 *next_ogmb = (ogmb + 1) % OGMB_CNT;
920 break;
921 } else
922 ogmb = (ogmb + 1) % OGMB_CNT;
923 }
924 spin_unlock_irqrestore(host->sh->host_lock, flags);
925
926 dprintk(", scb is 0x%06lx", (long) scbptr);
927
928 if (i >= OGMB_CNT) {
929 /*
930 * Alternatively, we might issue the "interrupt on free OGMB",
931 * and sleep, but it must be ensured that it isn't the init
932 * task running. Instead, this version assumes that the caller
933 * will be persistent, and try again. Since it's the adapter
934 * that marks OGMB's free, waiting even with interrupts off
935 * should work, since they are freed very quickly in most cases.
936 */
937 dprintk(", no free OGMBs.\n");
938 return (0);
939 }
940
941 wd7000_enable_intr(host);
942
943 start_ogmb = START_OGMB | ogmb;
944 command_out(host, &start_ogmb, 1);
945
946 dprintk(", awaiting interrupt.\n");
947
948 return (1);
949 }
950
951
952 static int make_code(unsigned hosterr, unsigned scsierr)
953 {
954 #ifdef WD7000_DEBUG
955 int in_error = hosterr;
956 #endif
957
958 switch ((hosterr >> 8) & 0xff) {
959 case 0: /* Reserved */
960 hosterr = DID_ERROR;
961 break;
962 case 1: /* Command Complete, no errors */
963 hosterr = DID_OK;
964 break;
965 case 2: /* Command complete, error logged in scb status (scsierr) */
966 hosterr = DID_OK;
967 break;
968 case 4: /* Command failed to complete - timeout */
969 hosterr = DID_TIME_OUT;
970 break;
971 case 5: /* Command terminated; Bus reset by external device */
972 hosterr = DID_RESET;
973 break;
974 case 6: /* Unexpected Command Received w/ host as target */
975 hosterr = DID_BAD_TARGET;
976 break;
977 case 80: /* Unexpected Reselection */
978 case 81: /* Unexpected Selection */
979 hosterr = DID_BAD_INTR;
980 break;
981 case 82: /* Abort Command Message */
982 hosterr = DID_ABORT;
983 break;
984 case 83: /* SCSI Bus Software Reset */
985 case 84: /* SCSI Bus Hardware Reset */
986 hosterr = DID_RESET;
987 break;
988 default: /* Reserved */
989 hosterr = DID_ERROR;
990 }
991 #ifdef WD7000_DEBUG
992 if (scsierr || hosterr)
993 dprintk("\nSCSI command error: SCSI 0x%02x host 0x%04x return %d\n", scsierr, in_error, hosterr);
994 #endif
995 return (scsierr | (hosterr << 16));
996 }
997
998 #define wd7000_intr_ack(host) outb (0, host->iobase + ASC_INTR_ACK)
999
1000
1001 static irqreturn_t wd7000_intr(int irq, void *dev_id)
1002 {
1003 Adapter *host = (Adapter *) dev_id;
1004 int flag, icmb, errstatus, icmb_status;
1005 int host_error, scsi_error;
1006 Scb *scb; /* for SCSI commands */
1007 IcbAny *icb; /* for host commands */
1008 struct scsi_cmnd *SCpnt;
1009 Mailbox *icmbs = host->mb.icmb;
1010 unsigned long flags;
1011
1012 spin_lock_irqsave(host->sh->host_lock, flags);
1013 host->int_counter++;
1014
1015 dprintk("wd7000_intr: irq = %d, host = 0x%06lx\n", irq, (long) host);
1016
1017 flag = inb(host->iobase + ASC_INTR_STAT);
1018
1019 dprintk("wd7000_intr: intr stat = 0x%02x\n", flag);
1020
1021 if (!(inb(host->iobase + ASC_STAT) & INT_IM)) {
1022 /* NB: these are _very_ possible if IRQ 15 is being used, since
1023 * it's the "garbage collector" on the 2nd 8259 PIC. Specifically,
1024 * any interrupt signal into the 8259 which can't be identified
1025 * comes out as 7 from the 8259, which is 15 to the host. Thus, it
1026 * is a good thing the WD7000 has an interrupt status port, so we
1027 * can sort these out. Otherwise, electrical noise and other such
1028 * problems would be indistinguishable from valid interrupts...
1029 */
1030 dprintk("wd7000_intr: phantom interrupt...\n");
1031 goto ack;
1032 }
1033
1034 if (!(flag & MB_INTR))
1035 goto ack;
1036
1037 /* The interrupt is for a mailbox */
1038 if (!(flag & IMB_INTR)) {
1039 dprintk("wd7000_intr: free outgoing mailbox\n");
1040 /*
1041 * If sleep_on() and the "interrupt on free OGMB" command are
1042 * used in mail_out(), wake_up() should correspondingly be called
1043 * here. For now, we don't need to do anything special.
1044 */
1045 goto ack;
1046 }
1047
1048 /* The interrupt is for an incoming mailbox */
1049 icmb = flag & MB_MASK;
1050 icmb_status = icmbs[icmb].status;
1051 if (icmb_status & 0x80) { /* unsolicited - result in ICMB */
1052 dprintk("wd7000_intr: unsolicited interrupt 0x%02x\n", icmb_status);
1053 goto ack;
1054 }
1055
1056 /* Aaaargh! (Zaga) */
1057 scb = isa_bus_to_virt(scsi2int((unchar *) icmbs[icmb].scbptr));
1058 icmbs[icmb].status = 0;
1059 if (scb->op & ICB_OP_MASK) { /* an SCB is done */
1060 icb = (IcbAny *) scb;
1061 icb->status = icmb_status;
1062 icb->phase = 0;
1063 goto ack;
1064 }
1065
1066 SCpnt = scb->SCpnt;
1067 if (--(SCpnt->SCp.phase) <= 0) { /* all scbs are done */
1068 host_error = scb->vue | (icmb_status << 8);
1069 scsi_error = scb->status;
1070 errstatus = make_code(host_error, scsi_error);
1071 SCpnt->result = errstatus;
1072
1073 free_scb(scb);
1074
1075 SCpnt->scsi_done(SCpnt);
1076 }
1077
1078 ack:
1079 dprintk("wd7000_intr: return from interrupt handler\n");
1080 wd7000_intr_ack(host);
1081
1082 spin_unlock_irqrestore(host->sh->host_lock, flags);
1083 return IRQ_HANDLED;
1084 }
1085
1086 static int wd7000_queuecommand(struct scsi_cmnd *SCpnt,
1087 void (*done)(struct scsi_cmnd *))
1088 {
1089 Scb *scb;
1090 Sgb *sgb;
1091 unchar *cdb = (unchar *) SCpnt->cmnd;
1092 unchar idlun;
1093 short cdblen;
1094 int nseg;
1095 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1096
1097 cdblen = SCpnt->cmd_len;
1098 idlun = ((SCpnt->device->id << 5) & 0xe0) | (SCpnt->device->lun & 7);
1099 SCpnt->scsi_done = done;
1100 SCpnt->SCp.phase = 1;
1101 scb = alloc_scbs(SCpnt->device->host, 1);
1102 scb->idlun = idlun;
1103 memcpy(scb->cdb, cdb, cdblen);
1104 scb->direc = 0x40; /* Disable direction check */
1105
1106 scb->SCpnt = SCpnt; /* so we can find stuff later */
1107 SCpnt->host_scribble = (unchar *) scb;
1108 scb->host = host;
1109
1110 nseg = scsi_sg_count(SCpnt);
1111 if (nseg > 1) {
1112 struct scatterlist *sg;
1113 unsigned i;
1114
1115 dprintk("Using scatter/gather with %d elements.\n", nseg);
1116
1117 sgb = scb->sgb;
1118 scb->op = 1;
1119 any2scsi(scb->dataptr, (int) sgb);
1120 any2scsi(scb->maxlen, nseg * sizeof(Sgb));
1121
1122 scsi_for_each_sg(SCpnt, sg, nseg, i) {
1123 any2scsi(sgb[i].ptr, isa_page_to_bus(sg_page(sg)) + sg->offset);
1124 any2scsi(sgb[i].len, sg->length);
1125 }
1126 } else {
1127 scb->op = 0;
1128 if (nseg) {
1129 struct scatterlist *sg = scsi_sglist(SCpnt);
1130 any2scsi(scb->dataptr, isa_page_to_bus(sg_page(sg)) + sg->offset);
1131 }
1132 any2scsi(scb->maxlen, scsi_bufflen(SCpnt));
1133 }
1134
1135 /* FIXME: drop lock and yield here ? */
1136
1137 while (!mail_out(host, scb))
1138 cpu_relax(); /* keep trying */
1139
1140 return 0;
1141 }
1142
1143 static int wd7000_diagnostics(Adapter * host, int code)
1144 {
1145 static IcbDiag icb = { ICB_OP_DIAGNOSTICS };
1146 static unchar buf[256];
1147 unsigned long timeout;
1148
1149 icb.type = code;
1150 any2scsi(icb.len, sizeof(buf));
1151 any2scsi(icb.ptr, (int) &buf);
1152 icb.phase = 1;
1153 /*
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.
1157 */
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 */
1162 barrier();
1163 }
1164
1165 if (icb.phase) {
1166 printk("wd7000_diagnostics: timed out.\n");
1167 return (0);
1168 }
1169 if (make_code(icb.vue | (icb.status << 8), 0)) {
1170 printk("wd7000_diagnostics: failed (0x%02x,0x%02x)\n", icb.vue, icb.status);
1171 return (0);
1172 }
1173
1174 return (1);
1175 }
1176
1177
1178 static int wd7000_adapter_reset(Adapter * host)
1179 {
1180 InitCmd init_cmd = {
1181 INITIALIZATION,
1182 7,
1183 host->bus_on,
1184 host->bus_off,
1185 0,
1186 {0, 0, 0},
1187 OGMB_CNT,
1188 ICMB_CNT
1189 };
1190 int diag;
1191 /*
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.
1194 */
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 */
1199
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 */
1203 }
1204
1205 if ((diag = inb(host->iobase + ASC_INTR_STAT)) != 1) {
1206 printk("wd7000_init: ");
1207
1208 switch (diag) {
1209 case 2:
1210 printk(KERN_ERR "RAM failure.\n");
1211 break;
1212 case 3:
1213 printk(KERN_ERR "FIFO R/W failed\n");
1214 break;
1215 case 4:
1216 printk(KERN_ERR "SBIC register R/W failed\n");
1217 break;
1218 case 5:
1219 printk(KERN_ERR "Initialization D-FF failed.\n");
1220 break;
1221 case 6:
1222 printk(KERN_ERR "Host IRQ D-FF failed.\n");
1223 break;
1224 case 7:
1225 printk(KERN_ERR "ROM checksum error.\n");
1226 break;
1227 default:
1228 printk(KERN_ERR "diagnostic code 0x%02Xh received.\n", diag);
1229 }
1230 return -1;
1231 }
1232 /* Clear mailboxes */
1233 memset(&(host->mb), 0, sizeof(host->mb));
1234
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");
1239 return -1;
1240 }
1241
1242 if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, ASC_INIT, 0)) {
1243 printk("wd7000_adapter_reset: WAIT timed out.\n");
1244 return -1;
1245 }
1246 return 0;
1247 }
1248
1249 static int wd7000_init(Adapter * host)
1250 {
1251 if (wd7000_adapter_reset(host) == -1)
1252 return 0;
1253
1254
1255 if (request_irq(host->irq, wd7000_intr, IRQF_DISABLED, "wd7000", host)) {
1256 printk("wd7000_init: can't get IRQ %d.\n", host->irq);
1257 return (0);
1258 }
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);
1262 return (0);
1263 }
1264 wd7000_enable_dma(host);
1265 wd7000_enable_intr(host);
1266
1267 if (!wd7000_diagnostics(host, ICB_DIAG_FULL)) {
1268 free_dma(host->dma);
1269 free_irq(host->irq, NULL);
1270 return (0);
1271 }
1272
1273 return (1);
1274 }
1275
1276
1277 static void wd7000_revision(Adapter * host)
1278 {
1279 static IcbRevLvl icb = { ICB_OP_GET_REVISION };
1280
1281 icb.phase = 1;
1282 /*
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.
1287 */
1288 mail_out(host, (struct scb *) &icb);
1289 while (icb.phase) {
1290 cpu_relax(); /* wait for completion */
1291 barrier();
1292 }
1293 host->rev1 = icb.primary;
1294 host->rev2 = icb.secondary;
1295 }
1296
1297
1298 #undef SPRINTF
1299 #define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
1300
1301 static int wd7000_set_info(char *buffer, int length, struct Scsi_Host *host)
1302 {
1303 dprintk("Buffer = <%.*s>, length = %d\n", length, buffer, length);
1304
1305 /*
1306 * Currently this is a no-op
1307 */
1308 dprintk("Sorry, this function is currently out of order...\n");
1309 return (length);
1310 }
1311
1312
1313 static int wd7000_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
1314 {
1315 Adapter *adapter = (Adapter *)host->hostdata;
1316 unsigned long flags;
1317 char *pos = buffer;
1318 #ifdef WD7000_DEBUG
1319 Mailbox *ogmbs, *icmbs;
1320 short count;
1321 #endif
1322
1323 /*
1324 * Has data been written to the file ?
1325 */
1326 if (inout)
1327 return (wd7000_set_info(buffer, length, host));
1328
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);
1337
1338 #ifdef WD7000_DEBUG
1339 ogmbs = adapter->mb.ogmb;
1340 icmbs = adapter->mb.icmb;
1341
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: ");
1346
1347 for (i = count = 0; i < ICMB_CNT; i++)
1348 if (icmbs[i].status) {
1349 count++;
1350 SPRINTF("0x%x ", i);
1351 }
1352
1353 SPRINTF(count ? "\n" : "none\n");
1354
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: ");
1359
1360 for (i = count = 0; i < OGMB_CNT; i++)
1361 if (ogmbs[i].status) {
1362 count++;
1363 SPRINTF("0x%x ", i);
1364 }
1365
1366 SPRINTF(count ? "\n" : "none\n");
1367 #endif
1368
1369 spin_unlock_irqrestore(host->host_lock, flags);
1370
1371 /*
1372 * Calculate start of next buffer, and return value.
1373 */
1374 *start = buffer + offset;
1375
1376 if ((pos - buffer) < offset)
1377 return (0);
1378 else if ((pos - buffer - offset) < length)
1379 return (pos - buffer - offset);
1380 else
1381 return (length);
1382 }
1383
1384
1385 /*
1386 * Returns the number of adapters this driver is supporting.
1387 *
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.
1393 *
1394 */
1395
1396 static __init int wd7000_detect(struct scsi_host_template *tpnt)
1397 {
1398 short present = 0, biosaddr_ptr, sig_ptr, i, pass;
1399 short biosptr[NUM_CONFIGS];
1400 unsigned iobase;
1401 Adapter *host = NULL;
1402 struct Scsi_Host *sh;
1403 int unit = 0;
1404
1405 dprintk("wd7000_detect: started\n");
1406
1407 #ifdef MODULE
1408 if (wd7000)
1409 wd7000_setup(wd7000);
1410 #endif
1411
1412 for (i = 0; i < UNITS; wd7000_host[i++] = NULL);
1413 for (i = 0; i < NUM_CONFIGS; biosptr[i++] = -1);
1414
1415 tpnt->proc_name = "wd7000";
1416 tpnt->proc_info = &wd7000_proc_info;
1417
1418 /*
1419 * Set up SCB free list, which is shared by all adapters
1420 */
1421 init_scbs();
1422
1423 for (pass = 0; pass < NUM_CONFIGS; pass++) {
1424 /*
1425 * First, search for BIOS SIGNATURE...
1426 */
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)
1431 break;
1432
1433 if (i == pass) {
1434 void __iomem *biosaddr = ioremap(wd7000_biosaddr[biosaddr_ptr] + signatures[sig_ptr].ofs,
1435 signatures[sig_ptr].len);
1436 short bios_match = 1;
1437
1438 if (biosaddr)
1439 bios_match = check_signature(biosaddr, signatures[sig_ptr].sig, signatures[sig_ptr].len);
1440
1441 iounmap(biosaddr);
1442
1443 if (bios_match)
1444 goto bios_matched;
1445 }
1446 }
1447
1448 bios_matched:
1449 /*
1450 * BIOS SIGNATURE has been found.
1451 */
1452 #ifdef WD7000_DEBUG
1453 dprintk("wd7000_detect: pass %d\n", pass + 1);
1454
1455 if (biosaddr_ptr == NUM_ADDRS)
1456 dprintk("WD-7000 SST BIOS not detected...\n");
1457 else
1458 dprintk("WD-7000 SST BIOS detected at 0x%lx: checking...\n", wd7000_biosaddr[biosaddr_ptr]);
1459 #endif
1460
1461 if (configs[pass].irq < 0)
1462 continue;
1463
1464 if (unit == UNITS)
1465 continue;
1466
1467 iobase = configs[pass].iobase;
1468
1469 dprintk("wd7000_detect: check IO 0x%x region...\n", iobase);
1470
1471 if (request_region(iobase, 4, "wd7000")) {
1472
1473 dprintk("wd7000_detect: ASC reset (IO 0x%x) ...", iobase);
1474 /*
1475 * ASC reset...
1476 */
1477 outb(ASC_RES, iobase + ASC_CONTROL);
1478 msleep(10);
1479 outb(0, iobase + ASC_CONTROL);
1480
1481 if (WAIT(iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
1482 dprintk("failed!\n");
1483 goto err_release;
1484 } else
1485 dprintk("ok!\n");
1486
1487 if (inb(iobase + ASC_INTR_STAT) == 1) {
1488 /*
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
1493 * array hostdata.
1494 */
1495 sh = scsi_register(tpnt, sizeof(Adapter));
1496 if (sh == NULL)
1497 goto err_release;
1498
1499 host = (Adapter *) sh->hostdata;
1500
1501 dprintk("wd7000_detect: adapter allocated at 0x%x\n", (int) host);
1502 memset(host, 0, sizeof(Adapter));
1503
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;
1511 unit++;
1512
1513 dprintk("wd7000_detect: Trying init WD-7000 card at IO " "0x%x, IRQ %d, DMA %d...\n", host->iobase, host->irq, host->dma);
1514
1515 if (!wd7000_init(host)) /* Initialization failed */
1516 goto err_unregister;
1517
1518 /*
1519 * OK from here - we'll use this adapter/configuration.
1520 */
1521 wd7000_revision(host); /* important for scatter/gather */
1522
1523 /*
1524 * For boards before rev 6.0, scatter/gather isn't supported.
1525 */
1526 if (host->rev1 < 6)
1527 sh->sg_tablesize = 1;
1528
1529 present++; /* count it */
1530
1531 if (biosaddr_ptr != NUM_ADDRS)
1532 biosptr[pass] = biosaddr_ptr;
1533
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);
1537 }
1538 } else
1539 dprintk("wd7000_detect: IO 0x%x region already allocated!\n", iobase);
1540
1541 continue;
1542
1543 err_unregister:
1544 scsi_unregister(sh);
1545 err_release:
1546 release_region(iobase, 4);
1547
1548 }
1549
1550 if (!present)
1551 printk("Failed initialization of WD-7000 SCSI card!\n");
1552
1553 return (present);
1554 }
1555
1556 static int wd7000_release(struct Scsi_Host *shost)
1557 {
1558 if (shost->irq)
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);
1563 return 0;
1564 }
1565
1566 #if 0
1567 /*
1568 * I have absolutely NO idea how to do an abort with the WD7000...
1569 */
1570 static int wd7000_abort(Scsi_Cmnd * SCpnt)
1571 {
1572 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1573
1574 if (inb(host->iobase + ASC_STAT) & INT_IM) {
1575 printk("wd7000_abort: lost interrupt\n");
1576 wd7000_intr_handle(host->irq, NULL, NULL);
1577 return FAILED;
1578 }
1579 return FAILED;
1580 }
1581 #endif
1582
1583 /*
1584 * Last resort. Reinitialize the board.
1585 */
1586
1587 static int wd7000_host_reset(struct scsi_cmnd *SCpnt)
1588 {
1589 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1590
1591 spin_unlock_irq(SCpnt->device->host->host_lock);
1592
1593 if (wd7000_adapter_reset(host) < 0) {
1594 spin_unlock_irq(SCpnt->device->host->host_lock);
1595 return FAILED;
1596 }
1597
1598 wd7000_enable_intr(host);
1599
1600 spin_unlock_irq(SCpnt->device->host->host_lock);
1601 return SUCCESS;
1602 }
1603
1604 /*
1605 * This was borrowed directly from aha1542.c. (Zaga)
1606 */
1607
1608 static int wd7000_biosparam(struct scsi_device *sdev,
1609 struct block_device *bdev, sector_t capacity, int *ip)
1610 {
1611 char b[BDEVNAME_SIZE];
1612
1613 dprintk("wd7000_biosparam: dev=%s, size=%d, ",
1614 bdevname(bdev, b), capacity);
1615 (void)b; /* unused var warning? */
1616
1617 /*
1618 * try default translation
1619 */
1620 ip[0] = 64;
1621 ip[1] = 32;
1622 ip[2] = capacity >> 11;
1623
1624 /*
1625 * for disks >1GB do some guessing
1626 */
1627 if (ip[2] >= 1024) {
1628 int info[3];
1629
1630 /*
1631 * try to figure out the geometry from the partition table
1632 */
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");
1635
1636 ip[0] = 255;
1637 ip[1] = 63;
1638 ip[2] = (unsigned long) capacity / (255 * 63);
1639 } else {
1640 ip[0] = info[0];
1641 ip[1] = info[1];
1642 ip[2] = info[2];
1643
1644 if (info[0] == 255)
1645 printk(KERN_INFO "%s: current partition table is " "using extended translation.\n", __FUNCTION__);
1646 }
1647 }
1648
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");
1651
1652 return (0);
1653 }
1654
1655 MODULE_AUTHOR("Thomas Wuensche, John Boyd, Miroslav Zagorac");
1656 MODULE_DESCRIPTION("Driver for the WD7000 series ISA controllers");
1657 MODULE_LICENSE("GPL");
1658
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,
1669 .this_id = 7,
1670 .sg_tablesize = WD7000_SG,
1671 .cmd_per_lun = 1,
1672 .unchecked_isa_dma = 1,
1673 .use_clustering = ENABLE_CLUSTERING,
1674 };
1675
1676 #include "scsi_module.c"
1677
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