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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@lxorguk.ukuu.org.uk>
150 *
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
154 *
155 * 2002/10/06 - Alan Cox <alan@lxorguk.ukuu.org.uk>
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 definition
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/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>
181
182#include <asm/dma.h>
183
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>
189
190
191#undef WD7000_DEBUG /* general debug */
192#ifdef WD7000_DEBUG
193#define dprintk printk
194#else
195#define dprintk(format,args...)
196#endif
197
198/*
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.
203 */
204#define OGMB_CNT 16
205#define ICMB_CNT 32
206
207/*
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.
213 */
214#define MAX_SCBS 32
215
216/*
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/
221 * gather.
222 *
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
225 * accordingly.
226 */
227#define WD7000_Q 16
228#define WD7000_SG 16
229
230
231/*
232 * WD7000-specific mailbox structure
233 *
234 */
235typedef volatile struct mailbox {
236 unchar status;
237 unchar scbptr[3]; /* SCSI-style - MSB first (big endian) */
238} Mailbox;
239
240/*
241 * This structure should contain all per-adapter global data. I.e., any
242 * new global per-adapter data should put in here.
243 */
244typedef 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 */
255 } mb;
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 */
259} Adapter;
260
261/*
262 * (linear) base address for ROM BIOS
263 */
264static const long wd7000_biosaddr[] = {
265 0xc0000, 0xc2000, 0xc4000, 0xc6000, 0xc8000, 0xca000, 0xcc000, 0xce000,
266 0xd0000, 0xd2000, 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0xde000
267};
268#define NUM_ADDRS ARRAY_SIZE(wd7000_biosaddr)
269
270static 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
275};
276#define NUM_IOPORTS ARRAY_SIZE(wd7000_iobase)
277
278static const short wd7000_irq[] = { 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 };
279#define NUM_IRQS ARRAY_SIZE(wd7000_irq)
280
281static const short wd7000_dma[] = { 5, 6, 7 };
282#define NUM_DMAS ARRAY_SIZE(wd7000_dma)
283
284/*
285 * The following is set up by wd7000_detect, and used thereafter for
286 * proc and other global ookups
287 */
288
289#define UNITS 8
290static struct Scsi_Host *wd7000_host[UNITS];
291
292#define BUS_ON 64 /* x 125ns = 8000ns (BIOS default) */
293#define BUS_OFF 15 /* x 125ns = 1875ns (BIOS default) */
294
295/*
296 * Standard Adapter Configurations - used by wd7000_detect
297 */
298typedef struct {
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 */
307} Config;
308
309/*
310 * Add here your configuration...
311 */
312static 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 */
317};
318#define NUM_CONFIGS ARRAY_SIZE(configs)
319
320/*
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.
324 */
325typedef 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 */
329} Signature;
330
331static const Signature signatures[] = {
332 {"SSTBIOS", 0x0000d, 7} /* "SSTBIOS" @ offset 0x0000d */
333};
334#define NUM_SIGNATURES ARRAY_SIZE(signatures)
335
336
337/*
338 * I/O Port Offsets and Bit Definitions
339 * 4 addresses are used. Those not defined here are reserved.
340 */
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 */
346
347/*
348 * ASC Status Port
349 */
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 */
355
356/*
357 * COMMAND opcodes
358 *
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.
364 */
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 */
375/*
376 * For INITIALIZATION:
377 */
378typedef 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, "" "" */
387} InitCmd;
388
389/*
390 * Interrupt Status Port - also returns diagnostic codes at ASC reset
391 *
392 * if msb is zero, the lower bits are diagnostic status
393 * Diagnostics:
394 * 01 No diagnostic error occurred
395 * 02 RAM failure
396 * 03 FIFO R/W failed
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
404 */
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 */
408
409/*
410 * CONTROL port bits
411 */
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 */
416
417/*
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
423 * to access them.
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.
428 *
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.
435 *
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.
440 */
441
442/*
443 * WD7000-specific scatter/gather element structure
444 */
445typedef struct sgb {
446 unchar len[3];
447 unchar ptr[3]; /* Also SCSI-style - MSB first */
448} Sgb;
449
450typedef 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 */
469} Scb;
470
471/*
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.
476 *
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.
481 */
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 */
498
499typedef struct icbRecvCmd {
500 unchar op;
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 */
508} IcbRecvCmd;
509
510typedef struct icbSendStat {
511 unchar op;
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 */
518} IcbSendStat;
519
520typedef struct icbRevLvl {
521 unchar op;
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 */
528} IcbRevLvl;
529
530typedef struct icbUnsMask { /* I'm totally guessing here */
531 unchar op;
532 volatile unchar mask[14]; /* mask bits */
533#if 0
534 unchar rsvd[12]; /* reserved */
535#endif
536 volatile unchar vue; /* vendor-unique error code */
537 volatile unchar status; /* returned (icmb) status */
538 volatile unchar phase; /* used by interrupt handler */
539} IcbUnsMask;
540
541typedef struct icbDiag {
542 unchar op;
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 */
550} IcbDiag;
551
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 */
556
557typedef struct icbParms {
558 unchar op;
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 */
567} IcbParms;
568
569typedef struct icbAny {
570 unchar op;
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 */
575} IcbAny;
576
577typedef union icb {
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 */
585 unchar data[18];
586} Icb;
587
588#ifdef MODULE
589static char *wd7000;
590module_param(wd7000, charp, 0);
591#endif
592
593/*
594 * Driver SCB structure pool.
595 *
596 * The SCBs declared here are shared by all host adapters; hence, this
597 * structure is not part of the Adapter structure.
598 */
599static Scb scbs[MAX_SCBS];
600static Scb *scbfree; /* free list */
601static int freescbs = MAX_SCBS; /* free list counter */
602static spinlock_t scbpool_lock; /* guards the scb free list and count */
603
604/*
605 * END of data/declarations - code follows.
606 */
607static void __init setup_error(char *mesg, int *ints)
608{
609 if (ints[0] == 3)
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);
613 else
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);
615}
616
617
618/*
619 * Note: You can now set these options from the kernel's "command line".
620 * The syntax is:
621 *
622 * wd7000=<IRQ>,<DMA>,<IO>[,<BUS_ON>[,<BUS_OFF>]]
623 *
624 * , where BUS_ON and BUS_OFF are in nanoseconds. BIOS default values
625 * are 8000ns for BUS_ON and 1875ns for BUS_OFF.
626 * eg:
627 * wd7000=7,6,0x350
628 *
629 * will configure the driver for a WD-7000 controller
630 * using IRQ 15 with a DMA channel 6, at IO base address 0x350.
631 */
632static int __init wd7000_setup(char *str)
633{
634 static short wd7000_card_num; /* .bss will zero this */
635 short i;
636 int ints[6];
637
638 (void) get_options(str, ARRAY_SIZE(ints), ints);
639
640 if (wd7000_card_num >= NUM_CONFIGS) {
641 printk(KERN_ERR "%s: Too many \"wd7000=\" configurations in " "command line!\n", __func__);
642 return 0;
643 }
644
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__);
647 } else {
648 for (i = 0; i < NUM_IRQS; i++)
649 if (ints[1] == wd7000_irq[i])
650 break;
651
652 if (i == NUM_IRQS) {
653 setup_error("invalid IRQ.", ints);
654 return 0;
655 } else
656 configs[wd7000_card_num].irq = ints[1];
657
658 for (i = 0; i < NUM_DMAS; i++)
659 if (ints[2] == wd7000_dma[i])
660 break;
661
662 if (i == NUM_DMAS) {
663 setup_error("invalid DMA channel.", ints);
664 return 0;
665 } else
666 configs[wd7000_card_num].dma = ints[2];
667
668 for (i = 0; i < NUM_IOPORTS; i++)
669 if (ints[3] == wd7000_iobase[i])
670 break;
671
672 if (i == NUM_IOPORTS) {
673 setup_error("invalid I/O base address.", ints);
674 return 0;
675 } else
676 configs[wd7000_card_num].iobase = ints[3];
677
678 if (ints[0] > 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;
682 } else
683 configs[wd7000_card_num].bus_on = ints[4] / 125;
684 } else
685 configs[wd7000_card_num].bus_on = BUS_ON;
686
687 if (ints[0] > 4) {
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;
691 } else
692 configs[wd7000_card_num].bus_off = ints[5] / 125;
693 } else
694 configs[wd7000_card_num].bus_off = BUS_OFF;
695
696 if (wd7000_card_num) {
697 for (i = 0; i < (wd7000_card_num - 1); i++) {
698 int j = i + 1;
699
700 for (; j < wd7000_card_num; j++)
701 if (configs[i].irq == configs[j].irq) {
702 setup_error("duplicated IRQ!", ints);
703 return 0;
704 }
705 if (configs[i].dma == configs[j].dma) {
706 setup_error("duplicated DMA " "channel!", ints);
707 return 0;
708 }
709 if (configs[i].iobase == configs[j].iobase) {
710 setup_error("duplicated I/O " "base address!", ints);
711 return 0;
712 }
713 }
714 }
715
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);
718
719 wd7000_card_num++;
720 }
721 return 1;
722}
723
724__setup("wd7000=", wd7000_setup);
725
726static inline void any2scsi(unchar * scsi, int any)
727{
728 *scsi++ = (unsigned)any >> 16;
729 *scsi++ = (unsigned)any >> 8;
730 *scsi++ = any;
731}
732
733static inline int scsi2int(unchar * scsi)
734{
735 return (scsi[0] << 16) | (scsi[1] << 8) | scsi[2];
736}
737
738static inline void wd7000_enable_intr(Adapter * host)
739{
740 host->control |= INT_EN;
741 outb(host->control, host->iobase + ASC_CONTROL);
742}
743
744
745static inline void wd7000_enable_dma(Adapter * host)
746{
747 unsigned long flags;
748 host->control |= DMA_EN;
749 outb(host->control, host->iobase + ASC_CONTROL);
750
751 flags = claim_dma_lock();
752 set_dma_mode(host->dma, DMA_MODE_CASCADE);
753 enable_dma(host->dma);
754 release_dma_lock(flags);
755
756}
757
758
759#define WAITnexttimeout 200 /* 2 seconds */
760
761static inline short WAIT(unsigned port, unsigned mask, unsigned allof, unsigned noneof)
762{
763 unsigned WAITbits;
764 unsigned long WAITtimeout = jiffies + WAITnexttimeout;
765
766 while (time_before_eq(jiffies, WAITtimeout)) {
767 WAITbits = inb(port) & mask;
768
769 if (((WAITbits & allof) == allof) && ((WAITbits & noneof) == 0))
770 return (0);
771 }
772
773 return (1);
774}
775
776
777static inline int command_out(Adapter * host, unchar * cmd, int len)
778{
779 if (!WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
780 while (len--) {
781 do {
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);
785
786 cmd++;
787 }
788
789 return (1);
790 }
791
792 printk(KERN_WARNING "wd7000 command_out: WAIT failed(%d)\n", len + 1);
793
794 return (0);
795}
796
797
798/*
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
806 * request.
807 */
808static inline Scb *alloc_scbs(struct Scsi_Host *host, int needed)
809{
810 Scb *scb, *p = NULL;
811 unsigned long flags;
812 unsigned long timeout = jiffies + WAITnexttimeout;
813 unsigned long now;
814 int i;
815
816 if (needed <= 0)
817 return (NULL); /* sanity check */
818
819 spin_unlock_irq(host->host_lock);
820
821 retry:
822 while (freescbs < needed) {
823 timeout = jiffies + WAITnexttimeout;
824 do {
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));
829 /*
830 * If we get here with enough free Scbs, we can take them.
831 * Otherwise, we timed out and didn't get enough.
832 */
833 if (freescbs < needed) {
834 printk(KERN_ERR "wd7000: can't get enough free SCBs.\n");
835 return (NULL);
836 }
837 }
838
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);
843 goto retry;
844 }
845
846 scb = scbfree;
847 freescbs -= needed;
848 for (i = 0; i < needed; i++) {
849 p = scbfree;
850 scbfree = p->next;
851 }
852 p->next = NULL;
853
854 spin_unlock_irqrestore(&scbpool_lock, flags);
855
856 spin_lock_irq(host->host_lock);
857 return (scb);
858}
859
860
861static inline void free_scb(Scb * scb)
862{
863 unsigned long flags;
864
865 spin_lock_irqsave(&scbpool_lock, flags);
866
867 memset(scb, 0, sizeof(Scb));
868 scb->next = scbfree;
869 scbfree = scb;
870 freescbs++;
871
872 spin_unlock_irqrestore(&scbpool_lock, flags);
873}
874
875
876static inline void init_scbs(void)
877{
878 int i;
879
880 spin_lock_init(&scbpool_lock);
881
882 /* This is only ever called before the SCB pool is active */
883
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;
889 }
890 scbs[MAX_SCBS - 1].next = NULL;
891 scbs[MAX_SCBS - 1].SCpnt = NULL;
892}
893
894
895static int mail_out(Adapter * host, Scb * scbptr)
896/*
897 * Note: this can also be used for ICBs; just cast to the parm type.
898 */
899{
900 int i, ogmb;
901 unsigned long flags;
902 unchar start_ogmb;
903 Mailbox *ogmbs = host->mb.ogmb;
904 int *next_ogmb = &(host->next_ogmb);
905
906 dprintk("wd7000_mail_out: 0x%06lx", (long) scbptr);
907
908 /* We first look for a free outgoing mailbox */
909 spin_lock_irqsave(host->sh->host_lock, flags);
910 ogmb = *next_ogmb;
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);
916
917 *next_ogmb = (ogmb + 1) % OGMB_CNT;
918 break;
919 } else
920 ogmb = (ogmb + 1) % OGMB_CNT;
921 }
922 spin_unlock_irqrestore(host->sh->host_lock, flags);
923
924 dprintk(", scb is 0x%06lx", (long) scbptr);
925
926 if (i >= OGMB_CNT) {
927 /*
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.
934 */
935 dprintk(", no free OGMBs.\n");
936 return (0);
937 }
938
939 wd7000_enable_intr(host);
940
941 start_ogmb = START_OGMB | ogmb;
942 command_out(host, &start_ogmb, 1);
943
944 dprintk(", awaiting interrupt.\n");
945
946 return (1);
947}
948
949
950static int make_code(unsigned hosterr, unsigned scsierr)
951{
952#ifdef WD7000_DEBUG
953 int in_error = hosterr;
954#endif
955
956 switch ((hosterr >> 8) & 0xff) {
957 case 0: /* Reserved */
958 hosterr = DID_ERROR;
959 break;
960 case 1: /* Command Complete, no errors */
961 hosterr = DID_OK;
962 break;
963 case 2: /* Command complete, error logged in scb status (scsierr) */
964 hosterr = DID_OK;
965 break;
966 case 4: /* Command failed to complete - timeout */
967 hosterr = DID_TIME_OUT;
968 break;
969 case 5: /* Command terminated; Bus reset by external device */
970 hosterr = DID_RESET;
971 break;
972 case 6: /* Unexpected Command Received w/ host as target */
973 hosterr = DID_BAD_TARGET;
974 break;
975 case 80: /* Unexpected Reselection */
976 case 81: /* Unexpected Selection */
977 hosterr = DID_BAD_INTR;
978 break;
979 case 82: /* Abort Command Message */
980 hosterr = DID_ABORT;
981 break;
982 case 83: /* SCSI Bus Software Reset */
983 case 84: /* SCSI Bus Hardware Reset */
984 hosterr = DID_RESET;
985 break;
986 default: /* Reserved */
987 hosterr = DID_ERROR;
988 }
989#ifdef WD7000_DEBUG
990 if (scsierr || hosterr)
991 dprintk("\nSCSI command error: SCSI 0x%02x host 0x%04x return %d\n", scsierr, in_error, hosterr);
992#endif
993 return (scsierr | (hosterr << 16));
994}
995
996#define wd7000_intr_ack(host) outb (0, host->iobase + ASC_INTR_ACK)
997
998
999static irqreturn_t wd7000_intr(int irq, void *dev_id)
1000{
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;
1009
1010 spin_lock_irqsave(host->sh->host_lock, flags);
1011 host->int_counter++;
1012
1013 dprintk("wd7000_intr: irq = %d, host = 0x%06lx\n", irq, (long) host);
1014
1015 flag = inb(host->iobase + ASC_INTR_STAT);
1016
1017 dprintk("wd7000_intr: intr stat = 0x%02x\n", flag);
1018
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...
1027 */
1028 dprintk("wd7000_intr: phantom interrupt...\n");
1029 goto ack;
1030 }
1031
1032 if (!(flag & MB_INTR))
1033 goto ack;
1034
1035 /* The interrupt is for a mailbox */
1036 if (!(flag & IMB_INTR)) {
1037 dprintk("wd7000_intr: free outgoing mailbox\n");
1038 /*
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.
1042 */
1043 goto ack;
1044 }
1045
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);
1051 goto ack;
1052 }
1053
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;
1060 icb->phase = 0;
1061 goto ack;
1062 }
1063
1064 SCpnt = scb->SCpnt;
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;
1070
1071 free_scb(scb);
1072
1073 SCpnt->scsi_done(SCpnt);
1074 }
1075
1076 ack:
1077 dprintk("wd7000_intr: return from interrupt handler\n");
1078 wd7000_intr_ack(host);
1079
1080 spin_unlock_irqrestore(host->sh->host_lock, flags);
1081 return IRQ_HANDLED;
1082}
1083
1084static int wd7000_queuecommand_lck(struct scsi_cmnd *SCpnt,
1085 void (*done)(struct scsi_cmnd *))
1086{
1087 Scb *scb;
1088 Sgb *sgb;
1089 unchar *cdb = (unchar *) SCpnt->cmnd;
1090 unchar idlun;
1091 short cdblen;
1092 int nseg;
1093 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1094
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);
1100 scb->idlun = idlun;
1101 memcpy(scb->cdb, cdb, cdblen);
1102 scb->direc = 0x40; /* Disable direction check */
1103
1104 scb->SCpnt = SCpnt; /* so we can find stuff later */
1105 SCpnt->host_scribble = (unchar *) scb;
1106 scb->host = host;
1107
1108 nseg = scsi_sg_count(SCpnt);
1109 if (nseg > 1) {
1110 struct scatterlist *sg;
1111 unsigned i;
1112
1113 dprintk("Using scatter/gather with %d elements.\n", nseg);
1114
1115 sgb = scb->sgb;
1116 scb->op = 1;
1117 any2scsi(scb->dataptr, (int) sgb);
1118 any2scsi(scb->maxlen, nseg * sizeof(Sgb));
1119
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);
1123 }
1124 } else {
1125 scb->op = 0;
1126 if (nseg) {
1127 struct scatterlist *sg = scsi_sglist(SCpnt);
1128 any2scsi(scb->dataptr, isa_page_to_bus(sg_page(sg)) + sg->offset);
1129 }
1130 any2scsi(scb->maxlen, scsi_bufflen(SCpnt));
1131 }
1132
1133 /* FIXME: drop lock and yield here ? */
1134
1135 while (!mail_out(host, scb))
1136 cpu_relax(); /* keep trying */
1137
1138 return 0;
1139}
1140
1141static DEF_SCSI_QCMD(wd7000_queuecommand)
1142
1143static 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
1178static 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
1249static 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, 0, "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
1277static 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...) { seq_printf(m, ## args); }
1300
1301static int wd7000_set_info(struct Scsi_Host *host, char *buffer, int length)
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
1313static int wd7000_show_info(struct seq_file *m, struct Scsi_Host *host)
1314{
1315 Adapter *adapter = (Adapter *)host->hostdata;
1316 unsigned long flags;
1317#ifdef WD7000_DEBUG
1318 Mailbox *ogmbs, *icmbs;
1319 short count;
1320#endif
1321
1322 spin_lock_irqsave(host->host_lock, flags);
1323 SPRINTF("Host scsi%d: Western Digital WD-7000 (rev %d.%d)\n", host->host_no, adapter->rev1, adapter->rev2);
1324 SPRINTF(" IO base: 0x%x\n", adapter->iobase);
1325 SPRINTF(" IRQ: %d\n", adapter->irq);
1326 SPRINTF(" DMA channel: %d\n", adapter->dma);
1327 SPRINTF(" Interrupts: %d\n", adapter->int_counter);
1328 SPRINTF(" BUS_ON time: %d nanoseconds\n", adapter->bus_on * 125);
1329 SPRINTF(" BUS_OFF time: %d nanoseconds\n", adapter->bus_off * 125);
1330
1331#ifdef WD7000_DEBUG
1332 ogmbs = adapter->mb.ogmb;
1333 icmbs = adapter->mb.icmb;
1334
1335 SPRINTF("\nControl port value: 0x%x\n", adapter->control);
1336 SPRINTF("Incoming mailbox:\n");
1337 SPRINTF(" size: %d\n", ICMB_CNT);
1338 SPRINTF(" queued messages: ");
1339
1340 for (i = count = 0; i < ICMB_CNT; i++)
1341 if (icmbs[i].status) {
1342 count++;
1343 SPRINTF("0x%x ", i);
1344 }
1345
1346 SPRINTF(count ? "\n" : "none\n");
1347
1348 SPRINTF("Outgoing mailbox:\n");
1349 SPRINTF(" size: %d\n", OGMB_CNT);
1350 SPRINTF(" next message: 0x%x\n", adapter->next_ogmb);
1351 SPRINTF(" queued messages: ");
1352
1353 for (i = count = 0; i < OGMB_CNT; i++)
1354 if (ogmbs[i].status) {
1355 count++;
1356 SPRINTF("0x%x ", i);
1357 }
1358
1359 SPRINTF(count ? "\n" : "none\n");
1360#endif
1361
1362 spin_unlock_irqrestore(host->host_lock, flags);
1363
1364 return 0;
1365}
1366
1367
1368/*
1369 * Returns the number of adapters this driver is supporting.
1370 *
1371 * The source for hosts.c says to wait to call scsi_register until 100%
1372 * sure about an adapter. We need to do it a little sooner here; we
1373 * need the storage set up by scsi_register before wd7000_init, and
1374 * changing the location of an Adapter structure is more trouble than
1375 * calling scsi_unregister.
1376 *
1377 */
1378
1379static __init int wd7000_detect(struct scsi_host_template *tpnt)
1380{
1381 short present = 0, biosaddr_ptr, sig_ptr, i, pass;
1382 short biosptr[NUM_CONFIGS];
1383 unsigned iobase;
1384 Adapter *host = NULL;
1385 struct Scsi_Host *sh;
1386 int unit = 0;
1387
1388 dprintk("wd7000_detect: started\n");
1389
1390#ifdef MODULE
1391 if (wd7000)
1392 wd7000_setup(wd7000);
1393#endif
1394
1395 for (i = 0; i < UNITS; wd7000_host[i++] = NULL);
1396 for (i = 0; i < NUM_CONFIGS; biosptr[i++] = -1);
1397
1398 tpnt->proc_name = "wd7000";
1399 tpnt->show_info = &wd7000_show_info;
1400 tpnt->write_info = wd7000_set_info;
1401
1402 /*
1403 * Set up SCB free list, which is shared by all adapters
1404 */
1405 init_scbs();
1406
1407 for (pass = 0; pass < NUM_CONFIGS; pass++) {
1408 /*
1409 * First, search for BIOS SIGNATURE...
1410 */
1411 for (biosaddr_ptr = 0; biosaddr_ptr < NUM_ADDRS; biosaddr_ptr++)
1412 for (sig_ptr = 0; sig_ptr < NUM_SIGNATURES; sig_ptr++) {
1413 for (i = 0; i < pass; i++)
1414 if (biosptr[i] == biosaddr_ptr)
1415 break;
1416
1417 if (i == pass) {
1418 void __iomem *biosaddr = ioremap(wd7000_biosaddr[biosaddr_ptr] + signatures[sig_ptr].ofs,
1419 signatures[sig_ptr].len);
1420 short bios_match = 1;
1421
1422 if (biosaddr)
1423 bios_match = check_signature(biosaddr, signatures[sig_ptr].sig, signatures[sig_ptr].len);
1424
1425 iounmap(biosaddr);
1426
1427 if (bios_match)
1428 goto bios_matched;
1429 }
1430 }
1431
1432 bios_matched:
1433 /*
1434 * BIOS SIGNATURE has been found.
1435 */
1436#ifdef WD7000_DEBUG
1437 dprintk("wd7000_detect: pass %d\n", pass + 1);
1438
1439 if (biosaddr_ptr == NUM_ADDRS)
1440 dprintk("WD-7000 SST BIOS not detected...\n");
1441 else
1442 dprintk("WD-7000 SST BIOS detected at 0x%lx: checking...\n", wd7000_biosaddr[biosaddr_ptr]);
1443#endif
1444
1445 if (configs[pass].irq < 0)
1446 continue;
1447
1448 if (unit == UNITS)
1449 continue;
1450
1451 iobase = configs[pass].iobase;
1452
1453 dprintk("wd7000_detect: check IO 0x%x region...\n", iobase);
1454
1455 if (request_region(iobase, 4, "wd7000")) {
1456
1457 dprintk("wd7000_detect: ASC reset (IO 0x%x) ...", iobase);
1458 /*
1459 * ASC reset...
1460 */
1461 outb(ASC_RES, iobase + ASC_CONTROL);
1462 msleep(10);
1463 outb(0, iobase + ASC_CONTROL);
1464
1465 if (WAIT(iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
1466 dprintk("failed!\n");
1467 goto err_release;
1468 } else
1469 dprintk("ok!\n");
1470
1471 if (inb(iobase + ASC_INTR_STAT) == 1) {
1472 /*
1473 * We register here, to get a pointer to the extra space,
1474 * which we'll use as the Adapter structure (host) for
1475 * this adapter. It is located just after the registered
1476 * Scsi_Host structure (sh), and is located by the empty
1477 * array hostdata.
1478 */
1479 sh = scsi_register(tpnt, sizeof(Adapter));
1480 if (sh == NULL)
1481 goto err_release;
1482
1483 host = (Adapter *) sh->hostdata;
1484
1485 dprintk("wd7000_detect: adapter allocated at 0x%x\n", (int) host);
1486 memset(host, 0, sizeof(Adapter));
1487
1488 host->irq = configs[pass].irq;
1489 host->dma = configs[pass].dma;
1490 host->iobase = iobase;
1491 host->int_counter = 0;
1492 host->bus_on = configs[pass].bus_on;
1493 host->bus_off = configs[pass].bus_off;
1494 host->sh = wd7000_host[unit] = sh;
1495 unit++;
1496
1497 dprintk("wd7000_detect: Trying init WD-7000 card at IO " "0x%x, IRQ %d, DMA %d...\n", host->iobase, host->irq, host->dma);
1498
1499 if (!wd7000_init(host)) /* Initialization failed */
1500 goto err_unregister;
1501
1502 /*
1503 * OK from here - we'll use this adapter/configuration.
1504 */
1505 wd7000_revision(host); /* important for scatter/gather */
1506
1507 /*
1508 * For boards before rev 6.0, scatter/gather isn't supported.
1509 */
1510 if (host->rev1 < 6)
1511 sh->sg_tablesize = 1;
1512
1513 present++; /* count it */
1514
1515 if (biosaddr_ptr != NUM_ADDRS)
1516 biosptr[pass] = biosaddr_ptr;
1517
1518 printk(KERN_INFO "Western Digital WD-7000 (rev %d.%d) ", host->rev1, host->rev2);
1519 printk("using IO 0x%x, IRQ %d, DMA %d.\n", host->iobase, host->irq, host->dma);
1520 printk(" BUS_ON time: %dns, BUS_OFF time: %dns\n", host->bus_on * 125, host->bus_off * 125);
1521 }
1522 } else
1523 dprintk("wd7000_detect: IO 0x%x region already allocated!\n", iobase);
1524
1525 continue;
1526
1527 err_unregister:
1528 scsi_unregister(sh);
1529 err_release:
1530 release_region(iobase, 4);
1531
1532 }
1533
1534 if (!present)
1535 printk("Failed initialization of WD-7000 SCSI card!\n");
1536
1537 return (present);
1538}
1539
1540static int wd7000_release(struct Scsi_Host *shost)
1541{
1542 if (shost->irq)
1543 free_irq(shost->irq, NULL);
1544 if (shost->io_port && shost->n_io_port)
1545 release_region(shost->io_port, shost->n_io_port);
1546 scsi_unregister(shost);
1547 return 0;
1548}
1549
1550#if 0
1551/*
1552 * I have absolutely NO idea how to do an abort with the WD7000...
1553 */
1554static int wd7000_abort(Scsi_Cmnd * SCpnt)
1555{
1556 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1557
1558 if (inb(host->iobase + ASC_STAT) & INT_IM) {
1559 printk("wd7000_abort: lost interrupt\n");
1560 wd7000_intr_handle(host->irq, NULL, NULL);
1561 return FAILED;
1562 }
1563 return FAILED;
1564}
1565#endif
1566
1567/*
1568 * Last resort. Reinitialize the board.
1569 */
1570
1571static int wd7000_host_reset(struct scsi_cmnd *SCpnt)
1572{
1573 Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
1574
1575 spin_lock_irq(SCpnt->device->host->host_lock);
1576
1577 if (wd7000_adapter_reset(host) < 0) {
1578 spin_unlock_irq(SCpnt->device->host->host_lock);
1579 return FAILED;
1580 }
1581
1582 wd7000_enable_intr(host);
1583
1584 spin_unlock_irq(SCpnt->device->host->host_lock);
1585 return SUCCESS;
1586}
1587
1588/*
1589 * This was borrowed directly from aha1542.c. (Zaga)
1590 */
1591
1592static int wd7000_biosparam(struct scsi_device *sdev,
1593 struct block_device *bdev, sector_t capacity, int *ip)
1594{
1595 char b[BDEVNAME_SIZE];
1596
1597 dprintk("wd7000_biosparam: dev=%s, size=%d, ",
1598 bdevname(bdev, b), capacity);
1599 (void)b; /* unused var warning? */
1600
1601 /*
1602 * try default translation
1603 */
1604 ip[0] = 64;
1605 ip[1] = 32;
1606 ip[2] = capacity >> 11;
1607
1608 /*
1609 * for disks >1GB do some guessing
1610 */
1611 if (ip[2] >= 1024) {
1612 int info[3];
1613
1614 /*
1615 * try to figure out the geometry from the partition table
1616 */
1617 if ((scsicam_bios_param(bdev, capacity, info) < 0) || !(((info[0] == 64) && (info[1] == 32)) || ((info[0] == 255) && (info[1] == 63)))) {
1618 printk("wd7000_biosparam: unable to verify geometry for disk with >1GB.\n" " using extended translation.\n");
1619
1620 ip[0] = 255;
1621 ip[1] = 63;
1622 ip[2] = (unsigned long) capacity / (255 * 63);
1623 } else {
1624 ip[0] = info[0];
1625 ip[1] = info[1];
1626 ip[2] = info[2];
1627
1628 if (info[0] == 255)
1629 printk(KERN_INFO "%s: current partition table is " "using extended translation.\n", __func__);
1630 }
1631 }
1632
1633 dprintk("bios geometry: head=%d, sec=%d, cyl=%d\n", ip[0], ip[1], ip[2]);
1634 dprintk("WARNING: check, if the bios geometry is correct.\n");
1635
1636 return (0);
1637}
1638
1639MODULE_AUTHOR("Thomas Wuensche, John Boyd, Miroslav Zagorac");
1640MODULE_DESCRIPTION("Driver for the WD7000 series ISA controllers");
1641MODULE_LICENSE("GPL");
1642
1643static struct scsi_host_template driver_template = {
1644 .proc_name = "wd7000",
1645 .show_info = wd7000_show_info,
1646 .write_info = wd7000_set_info,
1647 .name = "Western Digital WD-7000",
1648 .detect = wd7000_detect,
1649 .release = wd7000_release,
1650 .queuecommand = wd7000_queuecommand,
1651 .eh_host_reset_handler = wd7000_host_reset,
1652 .bios_param = wd7000_biosparam,
1653 .can_queue = WD7000_Q,
1654 .this_id = 7,
1655 .sg_tablesize = WD7000_SG,
1656 .cmd_per_lun = 1,
1657 .unchecked_isa_dma = 1,
1658 .use_clustering = ENABLE_CLUSTERING,
1659};
1660
1661#include "scsi_module.c"