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1da177e4 LT |
1 | /* |
2 | * seagate.c Copyright (C) 1992, 1993 Drew Eckhardt | |
3 | * low level scsi driver for ST01/ST02, Future Domain TMC-885, | |
4 | * TMC-950 by Drew Eckhardt <drew@colorado.edu> | |
5 | * | |
6 | * Note : TMC-880 boards don't work because they have two bits in | |
7 | * the status register flipped, I'll fix this "RSN" | |
8 | * [why do I have strong feeling that above message is from 1993? :-) | |
9 | * pavel@ucw.cz] | |
10 | * | |
11 | * This card does all the I/O via memory mapped I/O, so there is no need | |
12 | * to check or allocate a region of the I/O address space. | |
13 | */ | |
14 | ||
15 | /* 1996 - to use new read{b,w,l}, write{b,w,l}, and phys_to_virt | |
16 | * macros, replaced assembler routines with C. There's probably a | |
17 | * performance hit, but I only have a cdrom and can't tell. Define | |
18 | * SEAGATE_USE_ASM if you want the old assembler code -- SJT | |
19 | * | |
20 | * 1998-jul-29 - created DPRINTK macros and made it work under | |
21 | * linux 2.1.112, simplified some #defines etc. <pavel@ucw.cz> | |
22 | * | |
23 | * Aug 2000 - aeb - deleted seagate_st0x_biosparam(). It would try to | |
24 | * read the physical disk geometry, a bad mistake. Of course it doesn't | |
25 | * matter much what geometry one invents, but on large disks it | |
26 | * returned 256 (or more) heads, causing all kind of failures. | |
27 | * Of course this means that people might see a different geometry now, | |
28 | * so boot parameters may be necessary in some cases. | |
29 | */ | |
30 | ||
31 | /* | |
32 | * Configuration : | |
33 | * To use without BIOS -DOVERRIDE=base_address -DCONTROLLER=FD or SEAGATE | |
34 | * -DIRQ will override the default of 5. | |
35 | * Note: You can now set these options from the kernel's "command line". | |
36 | * The syntax is: | |
37 | * | |
38 | * st0x=ADDRESS,IRQ (for a Seagate controller) | |
39 | * or: | |
40 | * tmc8xx=ADDRESS,IRQ (for a TMC-8xx or TMC-950 controller) | |
41 | * eg: | |
42 | * tmc8xx=0xC8000,15 | |
43 | * | |
44 | * will configure the driver for a TMC-8xx style controller using IRQ 15 | |
45 | * with a base address of 0xC8000. | |
46 | * | |
47 | * -DARBITRATE | |
48 | * Will cause the host adapter to arbitrate for the | |
49 | * bus for better SCSI-II compatibility, rather than just | |
50 | * waiting for BUS FREE and then doing its thing. Should | |
51 | * let us do one command per Lun when I integrate my | |
52 | * reorganization changes into the distribution sources. | |
53 | * | |
54 | * -DDEBUG=65535 | |
55 | * Will activate debug code. | |
56 | * | |
57 | * -DFAST or -DFAST32 | |
58 | * Will use blind transfers where possible | |
59 | * | |
60 | * -DPARITY | |
61 | * This will enable parity. | |
62 | * | |
63 | * -DSEAGATE_USE_ASM | |
64 | * Will use older seagate assembly code. should be (very small amount) | |
65 | * Faster. | |
66 | * | |
67 | * -DSLOW_RATE=50 | |
68 | * Will allow compatibility with broken devices that don't | |
69 | * handshake fast enough (ie, some CD ROM's) for the Seagate | |
70 | * code. | |
71 | * | |
72 | * 50 is some number, It will let you specify a default | |
73 | * transfer rate if handshaking isn't working correctly. | |
74 | * | |
75 | * -DOLDCNTDATASCEME There is a new sceme to set the CONTROL | |
76 | * and DATA reigsters which complies more closely | |
77 | * with the SCSI2 standard. This hopefully eliminates | |
78 | * the need to swap the order these registers are | |
79 | * 'messed' with. It makes the following two options | |
80 | * obsolete. To reenable the old sceme define this. | |
81 | * | |
82 | * The following to options are patches from the SCSI.HOWTO | |
83 | * | |
84 | * -DSWAPSTAT This will swap the definitions for STAT_MSG and STAT_CD. | |
85 | * | |
86 | * -DSWAPCNTDATA This will swap the order that seagate.c messes with | |
87 | * the CONTROL an DATA registers. | |
88 | */ | |
89 | ||
90 | #include <linux/module.h> | |
91 | #include <linux/interrupt.h> | |
92 | #include <linux/spinlock.h> | |
93 | #include <linux/signal.h> | |
94 | #include <linux/string.h> | |
95 | #include <linux/proc_fs.h> | |
96 | #include <linux/init.h> | |
1da177e4 LT |
97 | #include <linux/blkdev.h> |
98 | #include <linux/stat.h> | |
68b3aa7c | 99 | #include <linux/delay.h> |
53d5ed62 | 100 | #include <linux/io.h> |
1da177e4 | 101 | |
1da177e4 LT |
102 | #include <asm/system.h> |
103 | #include <asm/uaccess.h> | |
104 | ||
53aefd3f HK |
105 | #include <scsi/scsi_cmnd.h> |
106 | #include <scsi/scsi_device.h> | |
107 | #include <scsi/scsi.h> | |
108 | ||
db9dff36 | 109 | #include <scsi/scsi_dbg.h> |
1da177e4 | 110 | #include <scsi/scsi_host.h> |
1da177e4 | 111 | |
1da177e4 LT |
112 | |
113 | #ifdef DEBUG | |
114 | #define DPRINTK( when, msg... ) do { if ( (DEBUG & (when)) == (when) ) printk( msg ); } while (0) | |
115 | #else | |
116 | #define DPRINTK( when, msg... ) do { } while (0) | |
9ef3c10e | 117 | #define DEBUG 0 |
1da177e4 LT |
118 | #endif |
119 | #define DANY( msg... ) DPRINTK( 0xffff, msg ); | |
120 | ||
121 | #ifndef IRQ | |
122 | #define IRQ 5 | |
123 | #endif | |
124 | ||
125 | #ifdef FAST32 | |
126 | #define FAST | |
127 | #endif | |
128 | ||
129 | #undef LINKED /* Linked commands are currently broken! */ | |
130 | ||
131 | #if defined(OVERRIDE) && !defined(CONTROLLER) | |
132 | #error Please use -DCONTROLLER=SEAGATE or -DCONTROLLER=FD to override controller type | |
133 | #endif | |
134 | ||
135 | #ifndef __i386__ | |
136 | #undef SEAGATE_USE_ASM | |
137 | #endif | |
138 | ||
139 | /* | |
140 | Thanks to Brian Antoine for the example code in his Messy-Loss ST-01 | |
141 | driver, and Mitsugu Suzuki for information on the ST-01 | |
142 | SCSI host. | |
143 | */ | |
144 | ||
145 | /* | |
146 | CONTROL defines | |
147 | */ | |
148 | ||
149 | #define CMD_RST 0x01 | |
150 | #define CMD_SEL 0x02 | |
151 | #define CMD_BSY 0x04 | |
152 | #define CMD_ATTN 0x08 | |
153 | #define CMD_START_ARB 0x10 | |
154 | #define CMD_EN_PARITY 0x20 | |
155 | #define CMD_INTR 0x40 | |
156 | #define CMD_DRVR_ENABLE 0x80 | |
157 | ||
158 | /* | |
159 | STATUS | |
160 | */ | |
161 | #ifdef SWAPSTAT | |
162 | #define STAT_MSG 0x08 | |
163 | #define STAT_CD 0x02 | |
164 | #else | |
165 | #define STAT_MSG 0x02 | |
166 | #define STAT_CD 0x08 | |
167 | #endif | |
168 | ||
169 | #define STAT_BSY 0x01 | |
170 | #define STAT_IO 0x04 | |
171 | #define STAT_REQ 0x10 | |
172 | #define STAT_SEL 0x20 | |
173 | #define STAT_PARITY 0x40 | |
174 | #define STAT_ARB_CMPL 0x80 | |
175 | ||
176 | /* | |
177 | REQUESTS | |
178 | */ | |
179 | ||
180 | #define REQ_MASK (STAT_CD | STAT_IO | STAT_MSG) | |
181 | #define REQ_DATAOUT 0 | |
182 | #define REQ_DATAIN STAT_IO | |
183 | #define REQ_CMDOUT STAT_CD | |
184 | #define REQ_STATIN (STAT_CD | STAT_IO) | |
185 | #define REQ_MSGOUT (STAT_MSG | STAT_CD) | |
186 | #define REQ_MSGIN (STAT_MSG | STAT_CD | STAT_IO) | |
187 | ||
188 | extern volatile int seagate_st0x_timeout; | |
189 | ||
190 | #ifdef PARITY | |
191 | #define BASE_CMD CMD_EN_PARITY | |
192 | #else | |
193 | #define BASE_CMD 0 | |
194 | #endif | |
195 | ||
196 | /* | |
197 | Debugging code | |
198 | */ | |
199 | ||
200 | #define PHASE_BUS_FREE 1 | |
201 | #define PHASE_ARBITRATION 2 | |
202 | #define PHASE_SELECTION 4 | |
203 | #define PHASE_DATAIN 8 | |
204 | #define PHASE_DATAOUT 0x10 | |
205 | #define PHASE_CMDOUT 0x20 | |
206 | #define PHASE_MSGIN 0x40 | |
207 | #define PHASE_MSGOUT 0x80 | |
208 | #define PHASE_STATUSIN 0x100 | |
209 | #define PHASE_ETC (PHASE_DATAIN | PHASE_DATAOUT | PHASE_CMDOUT | PHASE_MSGIN | PHASE_MSGOUT | PHASE_STATUSIN) | |
210 | #define PRINT_COMMAND 0x200 | |
211 | #define PHASE_EXIT 0x400 | |
212 | #define PHASE_RESELECT 0x800 | |
213 | #define DEBUG_FAST 0x1000 | |
214 | #define DEBUG_SG 0x2000 | |
215 | #define DEBUG_LINKED 0x4000 | |
216 | #define DEBUG_BORKEN 0x8000 | |
217 | ||
218 | /* | |
219 | * Control options - these are timeouts specified in .01 seconds. | |
220 | */ | |
221 | ||
222 | /* 30, 20 work */ | |
223 | #define ST0X_BUS_FREE_DELAY 25 | |
224 | #define ST0X_SELECTION_DELAY 25 | |
225 | ||
226 | #define SEAGATE 1 /* these determine the type of the controller */ | |
227 | #define FD 2 | |
228 | ||
229 | #define ST0X_ID_STR "Seagate ST-01/ST-02" | |
230 | #define FD_ID_STR "TMC-8XX/TMC-950" | |
231 | ||
232 | static int internal_command (unsigned char target, unsigned char lun, | |
233 | const void *cmnd, | |
234 | void *buff, int bufflen, int reselect); | |
235 | ||
236 | static int incommand; /* set if arbitration has finished | |
237 | and we are in some command phase. */ | |
238 | ||
239 | static unsigned int base_address = 0; /* Where the card ROM starts, used to | |
240 | calculate memory mapped register | |
241 | location. */ | |
242 | ||
243 | static void __iomem *st0x_cr_sr; /* control register write, status | |
244 | register read. 256 bytes in | |
245 | length. | |
246 | Read is status of SCSI BUS, as per | |
247 | STAT masks. */ | |
248 | ||
249 | static void __iomem *st0x_dr; /* data register, read write 256 | |
250 | bytes in length. */ | |
251 | ||
252 | static volatile int st0x_aborted = 0; /* set when we are aborted, ie by a | |
253 | time out, etc. */ | |
254 | ||
255 | static unsigned char controller_type = 0; /* set to SEAGATE for ST0x | |
256 | boards or FD for TMC-8xx | |
257 | boards */ | |
258 | static int irq = IRQ; | |
259 | ||
260 | module_param(base_address, uint, 0); | |
261 | module_param(controller_type, byte, 0); | |
262 | module_param(irq, int, 0); | |
263 | MODULE_LICENSE("GPL"); | |
264 | ||
265 | ||
266 | #define retcode(result) (((result) << 16) | (message << 8) | status) | |
267 | #define STATUS ((u8) readb(st0x_cr_sr)) | |
268 | #define DATA ((u8) readb(st0x_dr)) | |
269 | #define WRITE_CONTROL(d) { writeb((d), st0x_cr_sr); } | |
270 | #define WRITE_DATA(d) { writeb((d), st0x_dr); } | |
271 | ||
272 | #ifndef OVERRIDE | |
273 | static unsigned int seagate_bases[] = { | |
274 | 0xc8000, 0xca000, 0xcc000, | |
275 | 0xce000, 0xdc000, 0xde000 | |
276 | }; | |
277 | ||
278 | typedef struct { | |
279 | const unsigned char *signature; | |
280 | unsigned offset; | |
281 | unsigned length; | |
282 | unsigned char type; | |
283 | } Signature; | |
284 | ||
285 | static Signature __initdata signatures[] = { | |
286 | {"ST01 v1.7 (C) Copyright 1987 Seagate", 15, 37, SEAGATE}, | |
287 | {"SCSI BIOS 2.00 (C) Copyright 1987 Seagate", 15, 40, SEAGATE}, | |
288 | ||
289 | /* | |
290 | * The following two lines are NOT mistakes. One detects ROM revision | |
291 | * 3.0.0, the other 3.2. Since seagate has only one type of SCSI adapter, | |
292 | * and this is not going to change, the "SEAGATE" and "SCSI" together | |
293 | * are probably "good enough" | |
294 | */ | |
295 | ||
296 | {"SEAGATE SCSI BIOS ", 16, 17, SEAGATE}, | |
297 | {"SEAGATE SCSI BIOS ", 17, 17, SEAGATE}, | |
298 | ||
299 | /* | |
300 | * However, future domain makes several incompatible SCSI boards, so specific | |
301 | * signatures must be used. | |
302 | */ | |
303 | ||
304 | {"FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89", 5, 46, FD}, | |
305 | {"FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89", 5, 46, FD}, | |
306 | {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90", 5, 47, FD}, | |
307 | {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90", 5, 47, FD}, | |
308 | {"FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90", 5, 46, FD}, | |
309 | {"FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92", 5, 44, FD}, | |
310 | {"IBM F1 BIOS V1.1004/30/92", 5, 25, FD}, | |
311 | {"FUTURE DOMAIN TMC-950", 5, 21, FD}, | |
312 | /* Added for 2.2.16 by Matthias_Heidbrink@b.maus.de */ | |
313 | {"IBM F1 V1.2009/22/93", 5, 25, FD}, | |
314 | }; | |
315 | ||
6391a113 | 316 | #define NUM_SIGNATURES ARRAY_SIZE(signatures) |
1da177e4 LT |
317 | #endif /* n OVERRIDE */ |
318 | ||
319 | /* | |
320 | * hostno stores the hostnumber, as told to us by the init routine. | |
321 | */ | |
322 | ||
323 | static int hostno = -1; | |
7d12e780 DH |
324 | static void seagate_reconnect_intr (int, void *); |
325 | static irqreturn_t do_seagate_reconnect_intr (int, void *); | |
d7694f8c | 326 | static int seagate_st0x_bus_reset(struct scsi_cmnd *); |
1da177e4 LT |
327 | |
328 | #ifdef FAST | |
329 | static int fast = 1; | |
330 | #else | |
331 | #define fast 0 | |
332 | #endif | |
333 | ||
334 | #ifdef SLOW_RATE | |
335 | /* | |
336 | * Support for broken devices : | |
337 | * The Seagate board has a handshaking problem. Namely, a lack | |
338 | * thereof for slow devices. You can blast 600K/second through | |
339 | * it if you are polling for each byte, more if you do a blind | |
340 | * transfer. In the first case, with a fast device, REQ will | |
341 | * transition high-low or high-low-high before your loop restarts | |
342 | * and you'll have no problems. In the second case, the board | |
343 | * will insert wait states for up to 13.2 usecs for REQ to | |
344 | * transition low->high, and everything will work. | |
345 | * | |
346 | * However, there's nothing in the state machine that says | |
347 | * you *HAVE* to see a high-low-high set of transitions before | |
348 | * sending the next byte, and slow things like the Trantor CD ROMS | |
349 | * will break because of this. | |
350 | * | |
351 | * So, we need to slow things down, which isn't as simple as it | |
352 | * seems. We can't slow things down period, because then people | |
353 | * who don't recompile their kernels will shoot me for ruining | |
354 | * their performance. We need to do it on a case per case basis. | |
355 | * | |
356 | * The best for performance will be to, only for borken devices | |
357 | * (this is stored on a per-target basis in the scsi_devices array) | |
358 | * | |
359 | * Wait for a low->high transition before continuing with that | |
360 | * transfer. If we timeout, continue anyways. We don't need | |
361 | * a long timeout, because REQ should only be asserted until the | |
362 | * corresponding ACK is received and processed. | |
363 | * | |
364 | * Note that we can't use the system timer for this, because of | |
365 | * resolution, and we *really* can't use the timer chip since | |
366 | * gettimeofday() and the beeper routines use that. So, | |
367 | * the best thing for us to do will be to calibrate a timing | |
368 | * loop in the initialization code using the timer chip before | |
369 | * gettimeofday() can screw with it. | |
370 | * | |
371 | * FIXME: this is broken (not borken :-). Empty loop costs less than | |
372 | * loop with ISA access in it! -- pavel@ucw.cz | |
373 | */ | |
374 | ||
375 | static int borken_calibration = 0; | |
376 | ||
377 | static void __init borken_init (void) | |
378 | { | |
379 | register int count = 0, start = jiffies + 1, stop = start + 25; | |
380 | ||
381 | /* FIXME: There may be a better approach, this is a straight port for | |
382 | now */ | |
383 | preempt_disable(); | |
384 | while (time_before (jiffies, start)) | |
385 | cpu_relax(); | |
386 | for (; time_before (jiffies, stop); ++count) | |
387 | cpu_relax(); | |
388 | preempt_enable(); | |
389 | ||
390 | /* | |
391 | * Ok, we now have a count for .25 seconds. Convert to a | |
392 | * count per second and divide by transfer rate in K. */ | |
393 | ||
394 | borken_calibration = (count * 4) / (SLOW_RATE * 1024); | |
395 | ||
396 | if (borken_calibration < 1) | |
397 | borken_calibration = 1; | |
398 | } | |
399 | ||
400 | static inline void borken_wait (void) | |
401 | { | |
402 | register int count; | |
403 | ||
404 | for (count = borken_calibration; count && (STATUS & STAT_REQ); --count) | |
405 | cpu_relax(); | |
406 | ||
407 | #if (DEBUG & DEBUG_BORKEN) | |
408 | if (count) | |
409 | printk ("scsi%d : borken timeout\n", hostno); | |
410 | #endif | |
411 | } | |
412 | ||
413 | #endif /* def SLOW_RATE */ | |
414 | ||
415 | /* These beasts only live on ISA, and ISA means 8MHz. Each ULOOP() | |
416 | * contains at least one ISA access, which takes more than 0.125 | |
417 | * usec. So if we loop 8 times time in usec, we are safe. | |
418 | */ | |
419 | ||
420 | #define ULOOP( i ) for (clock = i*8;;) | |
421 | #define TIMEOUT (!(clock--)) | |
422 | ||
072c3a9d | 423 | static int __init seagate_st0x_detect (struct scsi_host_template * tpnt) |
1da177e4 LT |
424 | { |
425 | struct Scsi_Host *instance; | |
426 | int i, j; | |
427 | unsigned long cr, dr; | |
428 | ||
429 | tpnt->proc_name = "seagate"; | |
430 | /* | |
431 | * First, we try for the manual override. | |
432 | */ | |
433 | DANY ("Autodetecting ST0x / TMC-8xx\n"); | |
434 | ||
435 | if (hostno != -1) { | |
436 | printk (KERN_ERR "seagate_st0x_detect() called twice?!\n"); | |
437 | return 0; | |
438 | } | |
439 | ||
440 | /* If the user specified the controller type from the command line, | |
441 | controller_type will be non-zero, so don't try to detect one */ | |
442 | ||
443 | if (!controller_type) { | |
444 | #ifdef OVERRIDE | |
445 | base_address = OVERRIDE; | |
446 | controller_type = CONTROLLER; | |
447 | ||
448 | DANY ("Base address overridden to %x, controller type is %s\n", | |
449 | base_address, | |
450 | controller_type == SEAGATE ? "SEAGATE" : "FD"); | |
451 | #else /* OVERRIDE */ | |
452 | /* | |
453 | * To detect this card, we simply look for the signature | |
454 | * from the BIOS version notice in all the possible locations | |
455 | * of the ROM's. This has a nice side effect of not trashing | |
456 | * any register locations that might be used by something else. | |
457 | * | |
458 | * XXX - note that we probably should be probing the address | |
459 | * space for the on-board RAM instead. | |
460 | */ | |
461 | ||
6391a113 | 462 | for (i = 0; i < ARRAY_SIZE(seagate_bases); ++i) { |
1da177e4 LT |
463 | void __iomem *p = ioremap(seagate_bases[i], 0x2000); |
464 | if (!p) | |
465 | continue; | |
466 | for (j = 0; j < NUM_SIGNATURES; ++j) | |
467 | if (check_signature(p + signatures[j].offset, signatures[j].signature, signatures[j].length)) { | |
468 | base_address = seagate_bases[i]; | |
469 | controller_type = signatures[j].type; | |
470 | break; | |
471 | } | |
472 | iounmap(p); | |
473 | } | |
474 | #endif /* OVERRIDE */ | |
475 | } | |
476 | /* (! controller_type) */ | |
477 | tpnt->this_id = (controller_type == SEAGATE) ? 7 : 6; | |
478 | tpnt->name = (controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR; | |
479 | ||
480 | if (!base_address) { | |
481 | printk(KERN_INFO "seagate: ST0x/TMC-8xx not detected.\n"); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | cr = base_address + (controller_type == SEAGATE ? 0x1a00 : 0x1c00); | |
486 | dr = cr + 0x200; | |
487 | st0x_cr_sr = ioremap(cr, 0x100); | |
488 | st0x_dr = ioremap(dr, 0x100); | |
489 | ||
490 | DANY("%s detected. Base address = %x, cr = %x, dr = %x\n", | |
491 | tpnt->name, base_address, cr, dr); | |
492 | ||
493 | /* | |
494 | * At all times, we will use IRQ 5. Should also check for IRQ3 | |
495 | * if we lose our first interrupt. | |
496 | */ | |
497 | instance = scsi_register (tpnt, 0); | |
498 | if (instance == NULL) | |
499 | return 0; | |
500 | ||
501 | hostno = instance->host_no; | |
1d6f359a | 502 | if (request_irq (irq, do_seagate_reconnect_intr, IRQF_DISABLED, (controller_type == SEAGATE) ? "seagate" : "tmc-8xx", instance)) { |
1da177e4 LT |
503 | printk(KERN_ERR "scsi%d : unable to allocate IRQ%d\n", hostno, irq); |
504 | return 0; | |
505 | } | |
506 | instance->irq = irq; | |
507 | instance->io_port = base_address; | |
508 | #ifdef SLOW_RATE | |
509 | printk(KERN_INFO "Calibrating borken timer... "); | |
510 | borken_init(); | |
511 | printk(" %d cycles per transfer\n", borken_calibration); | |
512 | #endif | |
513 | printk (KERN_INFO "This is one second... "); | |
514 | { | |
515 | int clock; | |
516 | ULOOP (1 * 1000 * 1000) { | |
517 | STATUS; | |
518 | if (TIMEOUT) | |
519 | break; | |
520 | } | |
521 | } | |
522 | ||
523 | printk ("done, %s options:" | |
524 | #ifdef ARBITRATE | |
525 | " ARBITRATE" | |
526 | #endif | |
9ef3c10e | 527 | #if DEBUG |
1da177e4 LT |
528 | " DEBUG" |
529 | #endif | |
530 | #ifdef FAST | |
531 | " FAST" | |
532 | #ifdef FAST32 | |
533 | "32" | |
534 | #endif | |
535 | #endif | |
536 | #ifdef LINKED | |
537 | " LINKED" | |
538 | #endif | |
539 | #ifdef PARITY | |
540 | " PARITY" | |
541 | #endif | |
542 | #ifdef SEAGATE_USE_ASM | |
543 | " SEAGATE_USE_ASM" | |
544 | #endif | |
545 | #ifdef SLOW_RATE | |
546 | " SLOW_RATE" | |
547 | #endif | |
548 | #ifdef SWAPSTAT | |
549 | " SWAPSTAT" | |
550 | #endif | |
551 | #ifdef SWAPCNTDATA | |
552 | " SWAPCNTDATA" | |
553 | #endif | |
554 | "\n", tpnt->name); | |
555 | return 1; | |
556 | } | |
557 | ||
558 | static const char *seagate_st0x_info (struct Scsi_Host *shpnt) | |
559 | { | |
560 | static char buffer[64]; | |
561 | ||
562 | snprintf(buffer, 64, "%s at irq %d, address 0x%05X", | |
563 | (controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR, | |
564 | irq, base_address); | |
565 | return buffer; | |
566 | } | |
567 | ||
568 | /* | |
569 | * These are our saved pointers for the outstanding command that is | |
570 | * waiting for a reconnect | |
571 | */ | |
572 | ||
573 | static unsigned char current_target, current_lun; | |
574 | static unsigned char *current_cmnd, *current_data; | |
575 | static int current_nobuffs; | |
576 | static struct scatterlist *current_buffer; | |
577 | static int current_bufflen; | |
578 | ||
579 | #ifdef LINKED | |
580 | /* | |
581 | * linked_connected indicates whether or not we are currently connected to | |
582 | * linked_target, linked_lun and in an INFORMATION TRANSFER phase, | |
583 | * using linked commands. | |
584 | */ | |
585 | ||
586 | static int linked_connected = 0; | |
587 | static unsigned char linked_target, linked_lun; | |
588 | #endif | |
589 | ||
d7694f8c HK |
590 | static void (*done_fn) (struct scsi_cmnd *) = NULL; |
591 | static struct scsi_cmnd *SCint = NULL; | |
1da177e4 LT |
592 | |
593 | /* | |
594 | * These control whether or not disconnect / reconnect will be attempted, | |
595 | * or are being attempted. | |
596 | */ | |
597 | ||
598 | #define NO_RECONNECT 0 | |
599 | #define RECONNECT_NOW 1 | |
600 | #define CAN_RECONNECT 2 | |
601 | ||
602 | /* | |
603 | * LINKED_RIGHT indicates that we are currently connected to the correct target | |
604 | * for this command, LINKED_WRONG indicates that we are connected to the wrong | |
605 | * target. Note that these imply CAN_RECONNECT and require defined(LINKED). | |
606 | */ | |
607 | ||
608 | #define LINKED_RIGHT 3 | |
609 | #define LINKED_WRONG 4 | |
610 | ||
611 | /* | |
612 | * This determines if we are expecting to reconnect or not. | |
613 | */ | |
614 | ||
615 | static int should_reconnect = 0; | |
616 | ||
617 | /* | |
618 | * The seagate_reconnect_intr routine is called when a target reselects the | |
619 | * host adapter. This occurs on the interrupt triggered by the target | |
620 | * asserting SEL. | |
621 | */ | |
622 | ||
7d12e780 | 623 | static irqreturn_t do_seagate_reconnect_intr(int irq, void *dev_id) |
1da177e4 LT |
624 | { |
625 | unsigned long flags; | |
626 | struct Scsi_Host *dev = dev_id; | |
627 | ||
628 | spin_lock_irqsave (dev->host_lock, flags); | |
7d12e780 | 629 | seagate_reconnect_intr (irq, dev_id); |
1da177e4 LT |
630 | spin_unlock_irqrestore (dev->host_lock, flags); |
631 | return IRQ_HANDLED; | |
632 | } | |
633 | ||
7d12e780 | 634 | static void seagate_reconnect_intr (int irq, void *dev_id) |
1da177e4 LT |
635 | { |
636 | int temp; | |
d7694f8c | 637 | struct scsi_cmnd *SCtmp; |
1da177e4 LT |
638 | |
639 | DPRINTK (PHASE_RESELECT, "scsi%d : seagate_reconnect_intr() called\n", hostno); | |
640 | ||
641 | if (!should_reconnect) | |
642 | printk(KERN_WARNING "scsi%d: unexpected interrupt.\n", hostno); | |
643 | else { | |
644 | should_reconnect = 0; | |
645 | ||
646 | DPRINTK (PHASE_RESELECT, "scsi%d : internal_command(%d, %08x, %08x, RECONNECT_NOW\n", | |
647 | hostno, current_target, current_data, current_bufflen); | |
648 | ||
649 | temp = internal_command (current_target, current_lun, current_cmnd, current_data, current_bufflen, RECONNECT_NOW); | |
650 | ||
651 | if (msg_byte(temp) != DISCONNECT) { | |
652 | if (done_fn) { | |
653 | DPRINTK(PHASE_RESELECT, "scsi%d : done_fn(%d,%08x)", hostno, hostno, temp); | |
654 | if (!SCint) | |
655 | panic ("SCint == NULL in seagate"); | |
656 | SCtmp = SCint; | |
657 | SCint = NULL; | |
658 | SCtmp->result = temp; | |
659 | done_fn(SCtmp); | |
660 | } else | |
661 | printk(KERN_ERR "done_fn() not defined.\n"); | |
662 | } | |
663 | } | |
664 | } | |
665 | ||
666 | /* | |
667 | * The seagate_st0x_queue_command() function provides a queued interface | |
668 | * to the seagate SCSI driver. Basically, it just passes control onto the | |
669 | * seagate_command() function, after fixing it so that the done_fn() | |
670 | * is set to the one passed to the function. We have to be very careful, | |
671 | * because there are some commands on some devices that do not disconnect, | |
672 | * and if we simply call the done_fn when the command is done then another | |
673 | * command is started and queue_command is called again... We end up | |
674 | * overflowing the kernel stack, and this tends not to be such a good idea. | |
675 | */ | |
676 | ||
677 | static int recursion_depth = 0; | |
678 | ||
d7694f8c HK |
679 | static int seagate_st0x_queue_command(struct scsi_cmnd * SCpnt, |
680 | void (*done) (struct scsi_cmnd *)) | |
1da177e4 LT |
681 | { |
682 | int result, reconnect; | |
d7694f8c | 683 | struct scsi_cmnd *SCtmp; |
1da177e4 LT |
684 | |
685 | DANY ("seagate: que_command"); | |
686 | done_fn = done; | |
687 | current_target = SCpnt->device->id; | |
688 | current_lun = SCpnt->device->lun; | |
689 | current_cmnd = SCpnt->cmnd; | |
690 | current_data = (unsigned char *) SCpnt->request_buffer; | |
691 | current_bufflen = SCpnt->request_bufflen; | |
692 | SCint = SCpnt; | |
693 | if (recursion_depth) | |
694 | return 1; | |
695 | recursion_depth++; | |
696 | do { | |
697 | #ifdef LINKED | |
698 | /* | |
699 | * Set linked command bit in control field of SCSI command. | |
700 | */ | |
701 | ||
702 | current_cmnd[SCpnt->cmd_len] |= 0x01; | |
703 | if (linked_connected) { | |
704 | DPRINTK (DEBUG_LINKED, "scsi%d : using linked commands, current I_T_L nexus is ", hostno); | |
705 | if (linked_target == current_target && linked_lun == current_lun) | |
706 | { | |
707 | DPRINTK(DEBUG_LINKED, "correct\n"); | |
708 | reconnect = LINKED_RIGHT; | |
709 | } else { | |
710 | DPRINTK(DEBUG_LINKED, "incorrect\n"); | |
711 | reconnect = LINKED_WRONG; | |
712 | } | |
713 | } else | |
714 | #endif /* LINKED */ | |
715 | reconnect = CAN_RECONNECT; | |
716 | ||
717 | result = internal_command(SCint->device->id, SCint->device->lun, SCint->cmnd, | |
718 | SCint->request_buffer, SCint->request_bufflen, reconnect); | |
719 | if (msg_byte(result) == DISCONNECT) | |
720 | break; | |
721 | SCtmp = SCint; | |
722 | SCint = NULL; | |
723 | SCtmp->result = result; | |
724 | done_fn(SCtmp); | |
725 | } | |
726 | while (SCint); | |
727 | recursion_depth--; | |
728 | return 0; | |
729 | } | |
730 | ||
731 | static int internal_command (unsigned char target, unsigned char lun, | |
732 | const void *cmnd, void *buff, int bufflen, int reselect) | |
733 | { | |
734 | unsigned char *data = NULL; | |
735 | struct scatterlist *buffer = NULL; | |
736 | int clock, temp, nobuffs = 0, done = 0, len = 0; | |
9ef3c10e | 737 | #if DEBUG |
1da177e4 LT |
738 | int transfered = 0, phase = 0, newphase; |
739 | #endif | |
740 | register unsigned char status_read; | |
741 | unsigned char tmp_data, tmp_control, status = 0, message = 0; | |
742 | unsigned transfersize = 0, underflow = 0; | |
743 | #ifdef SLOW_RATE | |
744 | int borken = (int) SCint->device->borken; /* Does the current target require | |
745 | Very Slow I/O ? */ | |
746 | #endif | |
747 | ||
748 | incommand = 0; | |
749 | st0x_aborted = 0; | |
750 | ||
751 | #if (DEBUG & PRINT_COMMAND) | |
752 | printk("scsi%d : target = %d, command = ", hostno, target); | |
db9dff36 | 753 | __scsi_print_command((unsigned char *) cmnd); |
1da177e4 LT |
754 | #endif |
755 | ||
756 | #if (DEBUG & PHASE_RESELECT) | |
757 | switch (reselect) { | |
758 | case RECONNECT_NOW: | |
759 | printk("scsi%d : reconnecting\n", hostno); | |
760 | break; | |
761 | #ifdef LINKED | |
762 | case LINKED_RIGHT: | |
763 | printk("scsi%d : connected, can reconnect\n", hostno); | |
764 | break; | |
765 | case LINKED_WRONG: | |
766 | printk("scsi%d : connected to wrong target, can reconnect\n", | |
767 | hostno); | |
768 | break; | |
769 | #endif | |
770 | case CAN_RECONNECT: | |
771 | printk("scsi%d : allowed to reconnect\n", hostno); | |
772 | break; | |
773 | default: | |
774 | printk("scsi%d : not allowed to reconnect\n", hostno); | |
775 | } | |
776 | #endif | |
777 | ||
778 | if (target == (controller_type == SEAGATE ? 7 : 6)) | |
779 | return DID_BAD_TARGET; | |
780 | ||
781 | /* | |
782 | * We work it differently depending on if this is is "the first time," | |
783 | * or a reconnect. If this is a reselect phase, then SEL will | |
784 | * be asserted, and we must skip selection / arbitration phases. | |
785 | */ | |
786 | ||
787 | switch (reselect) { | |
788 | case RECONNECT_NOW: | |
789 | DPRINTK (PHASE_RESELECT, "scsi%d : phase RESELECT \n", hostno); | |
790 | /* | |
791 | * At this point, we should find the logical or of our ID | |
792 | * and the original target's ID on the BUS, with BSY, SEL, | |
793 | * and I/O signals asserted. | |
794 | * | |
795 | * After ARBITRATION phase is completed, only SEL, BSY, | |
796 | * and the target ID are asserted. A valid initiator ID | |
797 | * is not on the bus until IO is asserted, so we must wait | |
798 | * for that. | |
799 | */ | |
800 | ULOOP (100 * 1000) { | |
801 | temp = STATUS; | |
802 | if ((temp & STAT_IO) && !(temp & STAT_BSY)) | |
803 | break; | |
804 | if (TIMEOUT) { | |
805 | DPRINTK (PHASE_RESELECT, "scsi%d : RESELECT timed out while waiting for IO .\n", hostno); | |
806 | return (DID_BAD_INTR << 16); | |
807 | } | |
808 | } | |
809 | ||
810 | /* | |
811 | * After I/O is asserted by the target, we can read our ID | |
812 | * and its ID off of the BUS. | |
813 | */ | |
814 | ||
815 | if (!((temp = DATA) & (controller_type == SEAGATE ? 0x80 : 0x40))) { | |
816 | DPRINTK (PHASE_RESELECT, "scsi%d : detected reconnect request to different target.\n\tData bus = %d\n", hostno, temp); | |
817 | return (DID_BAD_INTR << 16); | |
818 | } | |
819 | ||
820 | if (!(temp & (1 << current_target))) { | |
821 | printk(KERN_WARNING "scsi%d : Unexpected reselect interrupt. Data bus = %d\n", hostno, temp); | |
822 | return (DID_BAD_INTR << 16); | |
823 | } | |
824 | ||
825 | buffer = current_buffer; | |
826 | cmnd = current_cmnd; /* WDE add */ | |
827 | data = current_data; /* WDE add */ | |
828 | len = current_bufflen; /* WDE add */ | |
829 | nobuffs = current_nobuffs; | |
830 | ||
831 | /* | |
832 | * We have determined that we have been selected. At this | |
833 | * point, we must respond to the reselection by asserting | |
834 | * BSY ourselves | |
835 | */ | |
836 | ||
837 | #if 1 | |
838 | WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY); | |
839 | #else | |
840 | WRITE_CONTROL (BASE_CMD | CMD_BSY); | |
841 | #endif | |
842 | ||
843 | /* | |
844 | * The target will drop SEL, and raise BSY, at which time | |
845 | * we must drop BSY. | |
846 | */ | |
847 | ||
848 | ULOOP (100 * 1000) { | |
849 | if (!(STATUS & STAT_SEL)) | |
850 | break; | |
851 | if (TIMEOUT) { | |
852 | WRITE_CONTROL (BASE_CMD | CMD_INTR); | |
853 | DPRINTK (PHASE_RESELECT, "scsi%d : RESELECT timed out while waiting for SEL.\n", hostno); | |
854 | return (DID_BAD_INTR << 16); | |
855 | } | |
856 | } | |
857 | WRITE_CONTROL (BASE_CMD); | |
858 | /* | |
859 | * At this point, we have connected with the target | |
860 | * and can get on with our lives. | |
861 | */ | |
862 | break; | |
863 | case CAN_RECONNECT: | |
864 | #ifdef LINKED | |
865 | /* | |
866 | * This is a bletcherous hack, just as bad as the Unix #! | |
867 | * interpreter stuff. If it turns out we are using the wrong | |
868 | * I_T_L nexus, the easiest way to deal with it is to go into | |
869 | * our INFORMATION TRANSFER PHASE code, send a ABORT | |
870 | * message on MESSAGE OUT phase, and then loop back to here. | |
871 | */ | |
872 | connect_loop: | |
873 | #endif | |
874 | DPRINTK (PHASE_BUS_FREE, "scsi%d : phase = BUS FREE \n", hostno); | |
875 | ||
876 | /* | |
877 | * BUS FREE PHASE | |
878 | * | |
879 | * On entry, we make sure that the BUS is in a BUS FREE | |
880 | * phase, by insuring that both BSY and SEL are low for | |
881 | * at least one bus settle delay. Several reads help | |
882 | * eliminate wire glitch. | |
883 | */ | |
884 | ||
885 | #ifndef ARBITRATE | |
886 | #error FIXME: this is broken: we may not use jiffies here - we are under cli(). It will hardlock. | |
887 | clock = jiffies + ST0X_BUS_FREE_DELAY; | |
888 | ||
889 | while (((STATUS | STATUS | STATUS) & (STAT_BSY | STAT_SEL)) && (!st0x_aborted) && time_before (jiffies, clock)) | |
890 | cpu_relax(); | |
891 | ||
892 | if (time_after (jiffies, clock)) | |
893 | return retcode (DID_BUS_BUSY); | |
894 | else if (st0x_aborted) | |
895 | return retcode (st0x_aborted); | |
896 | #endif | |
897 | DPRINTK (PHASE_SELECTION, "scsi%d : phase = SELECTION\n", hostno); | |
898 | ||
899 | clock = jiffies + ST0X_SELECTION_DELAY; | |
900 | ||
901 | /* | |
902 | * Arbitration/selection procedure : | |
903 | * 1. Disable drivers | |
904 | * 2. Write HOST adapter address bit | |
905 | * 3. Set start arbitration. | |
906 | * 4. We get either ARBITRATION COMPLETE or SELECT at this | |
907 | * point. | |
908 | * 5. OR our ID and targets on bus. | |
909 | * 6. Enable SCSI drivers and asserted SEL and ATTN | |
910 | */ | |
911 | ||
912 | #ifdef ARBITRATE | |
913 | /* FIXME: verify host lock is always held here */ | |
914 | WRITE_CONTROL(0); | |
915 | WRITE_DATA((controller_type == SEAGATE) ? 0x80 : 0x40); | |
916 | WRITE_CONTROL(CMD_START_ARB); | |
917 | ||
918 | ULOOP (ST0X_SELECTION_DELAY * 10000) { | |
919 | status_read = STATUS; | |
920 | if (status_read & STAT_ARB_CMPL) | |
921 | break; | |
922 | if (st0x_aborted) /* FIXME: What? We are going to do something even after abort? */ | |
923 | break; | |
924 | if (TIMEOUT || (status_read & STAT_SEL)) { | |
925 | printk(KERN_WARNING "scsi%d : arbitration lost or timeout.\n", hostno); | |
926 | WRITE_CONTROL (BASE_CMD); | |
927 | return retcode (DID_NO_CONNECT); | |
928 | } | |
929 | } | |
930 | DPRINTK (PHASE_SELECTION, "scsi%d : arbitration complete\n", hostno); | |
931 | #endif | |
932 | ||
933 | /* | |
934 | * When the SCSI device decides that we're gawking at it, | |
935 | * it will respond by asserting BUSY on the bus. | |
936 | * | |
937 | * Note : the Seagate ST-01/02 product manual says that we | |
938 | * should twiddle the DATA register before the control | |
939 | * register. However, this does not work reliably so we do | |
940 | * it the other way around. | |
941 | * | |
942 | * Probably could be a problem with arbitration too, we | |
943 | * really should try this with a SCSI protocol or logic | |
944 | * analyzer to see what is going on. | |
945 | */ | |
946 | tmp_data = (unsigned char) ((1 << target) | (controller_type == SEAGATE ? 0x80 : 0x40)); | |
947 | tmp_control = BASE_CMD | CMD_DRVR_ENABLE | CMD_SEL | (reselect ? CMD_ATTN : 0); | |
948 | ||
949 | /* FIXME: verify host lock is always held here */ | |
950 | #ifdef OLDCNTDATASCEME | |
951 | #ifdef SWAPCNTDATA | |
952 | WRITE_CONTROL (tmp_control); | |
953 | WRITE_DATA (tmp_data); | |
954 | #else | |
955 | WRITE_DATA (tmp_data); | |
956 | WRITE_CONTROL (tmp_control); | |
957 | #endif | |
958 | #else | |
959 | tmp_control ^= CMD_BSY; /* This is guesswork. What used to be in driver */ | |
960 | WRITE_CONTROL (tmp_control); /* could never work: it sent data into control */ | |
961 | WRITE_DATA (tmp_data); /* register and control info into data. Hopefully */ | |
962 | tmp_control ^= CMD_BSY; /* fixed, but order of first two may be wrong. */ | |
963 | WRITE_CONTROL (tmp_control); /* -- pavel@ucw.cz */ | |
964 | #endif | |
965 | ||
966 | ULOOP (250 * 1000) { | |
967 | if (st0x_aborted) { | |
968 | /* | |
969 | * If we have been aborted, and we have a | |
970 | * command in progress, IE the target | |
971 | * still has BSY asserted, then we will | |
972 | * reset the bus, and notify the midlevel | |
973 | * driver to expect sense. | |
974 | */ | |
975 | ||
976 | WRITE_CONTROL (BASE_CMD); | |
977 | if (STATUS & STAT_BSY) { | |
978 | printk(KERN_WARNING "scsi%d : BST asserted after we've been aborted.\n", hostno); | |
979 | seagate_st0x_bus_reset(NULL); | |
980 | return retcode (DID_RESET); | |
981 | } | |
982 | return retcode (st0x_aborted); | |
983 | } | |
984 | if (STATUS & STAT_BSY) | |
985 | break; | |
986 | if (TIMEOUT) { | |
987 | DPRINTK (PHASE_SELECTION, "scsi%d : NO CONNECT with target %d, stat = %x \n", hostno, target, STATUS); | |
988 | return retcode (DID_NO_CONNECT); | |
989 | } | |
990 | } | |
991 | ||
992 | /* Establish current pointers. Take into account scatter / gather */ | |
993 | ||
994 | if ((nobuffs = SCint->use_sg)) { | |
995 | #if (DEBUG & DEBUG_SG) | |
996 | { | |
997 | int i; | |
998 | printk("scsi%d : scatter gather requested, using %d buffers.\n", hostno, nobuffs); | |
999 | for (i = 0; i < nobuffs; ++i) | |
1000 | printk("scsi%d : buffer %d address = %p length = %d\n", | |
1001 | hostno, i, | |
45711f1a | 1002 | sg_virt(&buffer[i]), |
1da177e4 LT |
1003 | buffer[i].length); |
1004 | } | |
1005 | #endif | |
1006 | ||
79bd3f85 | 1007 | buffer = (struct scatterlist *) SCint->request_buffer; |
1da177e4 | 1008 | len = buffer->length; |
45711f1a | 1009 | data = sg_virt(buffer); |
1da177e4 LT |
1010 | } else { |
1011 | DPRINTK (DEBUG_SG, "scsi%d : scatter gather not requested.\n", hostno); | |
1012 | buffer = NULL; | |
1013 | len = SCint->request_bufflen; | |
1014 | data = (unsigned char *) SCint->request_buffer; | |
1015 | } | |
1016 | ||
1017 | DPRINTK (PHASE_DATAIN | PHASE_DATAOUT, "scsi%d : len = %d\n", | |
1018 | hostno, len); | |
1019 | ||
1020 | break; | |
1021 | #ifdef LINKED | |
1022 | case LINKED_RIGHT: | |
1023 | break; | |
1024 | case LINKED_WRONG: | |
1025 | break; | |
1026 | #endif | |
1027 | } /* end of switch(reselect) */ | |
1028 | ||
1029 | /* | |
1030 | * There are several conditions under which we wish to send a message : | |
1031 | * 1. When we are allowing disconnect / reconnect, and need to | |
1032 | * establish the I_T_L nexus via an IDENTIFY with the DiscPriv bit | |
1033 | * set. | |
1034 | * | |
1035 | * 2. When we are doing linked commands, are have the wrong I_T_L | |
1036 | * nexus established and want to send an ABORT message. | |
1037 | */ | |
1038 | ||
1039 | /* GCC does not like an ifdef inside a macro, so do it the hard way. */ | |
1040 | #ifdef LINKED | |
1041 | WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | (((reselect == CAN_RECONNECT)|| (reselect == LINKED_WRONG))? CMD_ATTN : 0)); | |
1042 | #else | |
1043 | WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | (((reselect == CAN_RECONNECT))? CMD_ATTN : 0)); | |
1044 | #endif | |
1045 | ||
1046 | /* | |
1047 | * INFORMATION TRANSFER PHASE | |
1048 | * | |
1049 | * The nasty looking read / write inline assembler loops we use for | |
1050 | * DATAIN and DATAOUT phases are approximately 4-5 times as fast as | |
1051 | * the 'C' versions - since we're moving 1024 bytes of data, this | |
1052 | * really adds up. | |
1053 | * | |
1054 | * SJT: The nasty-looking assembler is gone, so it's slower. | |
1055 | * | |
1056 | */ | |
1057 | ||
1058 | DPRINTK (PHASE_ETC, "scsi%d : phase = INFORMATION TRANSFER\n", hostno); | |
1059 | ||
1060 | incommand = 1; | |
1061 | transfersize = SCint->transfersize; | |
1062 | underflow = SCint->underflow; | |
1063 | ||
1064 | /* | |
1065 | * Now, we poll the device for status information, | |
1066 | * and handle any requests it makes. Note that since we are unsure | |
1067 | * of how much data will be flowing across the system, etc and | |
1068 | * cannot make reasonable timeouts, that we will instead have the | |
1069 | * midlevel driver handle any timeouts that occur in this phase. | |
1070 | */ | |
1071 | ||
1072 | while (((status_read = STATUS) & STAT_BSY) && !st0x_aborted && !done) { | |
1073 | #ifdef PARITY | |
1074 | if (status_read & STAT_PARITY) { | |
1075 | printk(KERN_ERR "scsi%d : got parity error\n", hostno); | |
1076 | st0x_aborted = DID_PARITY; | |
1077 | } | |
1078 | #endif | |
1079 | if (status_read & STAT_REQ) { | |
1080 | #if ((DEBUG & PHASE_ETC) == PHASE_ETC) | |
1081 | if ((newphase = (status_read & REQ_MASK)) != phase) { | |
1082 | phase = newphase; | |
1083 | switch (phase) { | |
1084 | case REQ_DATAOUT: | |
1085 | printk ("scsi%d : phase = DATA OUT\n", hostno); | |
1086 | break; | |
1087 | case REQ_DATAIN: | |
1088 | printk ("scsi%d : phase = DATA IN\n", hostno); | |
1089 | break; | |
1090 | case REQ_CMDOUT: | |
1091 | printk | |
1092 | ("scsi%d : phase = COMMAND OUT\n", hostno); | |
1093 | break; | |
1094 | case REQ_STATIN: | |
1095 | printk ("scsi%d : phase = STATUS IN\n", hostno); | |
1096 | break; | |
1097 | case REQ_MSGOUT: | |
1098 | printk | |
1099 | ("scsi%d : phase = MESSAGE OUT\n", hostno); | |
1100 | break; | |
1101 | case REQ_MSGIN: | |
1102 | printk ("scsi%d : phase = MESSAGE IN\n", hostno); | |
1103 | break; | |
1104 | default: | |
1105 | printk ("scsi%d : phase = UNKNOWN\n", hostno); | |
1106 | st0x_aborted = DID_ERROR; | |
1107 | } | |
1108 | } | |
1109 | #endif | |
1110 | switch (status_read & REQ_MASK) { | |
1111 | case REQ_DATAOUT: | |
1112 | /* | |
1113 | * If we are in fast mode, then we simply splat | |
1114 | * the data out in word-sized chunks as fast as | |
1115 | * we can. | |
1116 | */ | |
1117 | ||
1118 | if (!len) { | |
1119 | #if 0 | |
1120 | printk("scsi%d: underflow to target %d lun %d \n", hostno, target, lun); | |
1121 | st0x_aborted = DID_ERROR; | |
1122 | fast = 0; | |
1123 | #endif | |
1124 | break; | |
1125 | } | |
1126 | ||
1127 | if (fast && transfersize | |
1128 | && !(len % transfersize) | |
1129 | && (len >= transfersize) | |
1130 | #ifdef FAST32 | |
1131 | && !(transfersize % 4) | |
1132 | #endif | |
1133 | ) { | |
1134 | DPRINTK (DEBUG_FAST, | |
1135 | "scsi%d : FAST transfer, underflow = %d, transfersize = %d\n" | |
1136 | " len = %d, data = %08x\n", | |
1137 | hostno, SCint->underflow, | |
1138 | SCint->transfersize, len, | |
1139 | data); | |
1140 | ||
1141 | /* SJT: Start. Fast Write */ | |
1142 | #ifdef SEAGATE_USE_ASM | |
1143 | __asm__ ("cld\n\t" | |
1144 | #ifdef FAST32 | |
1145 | "shr $2, %%ecx\n\t" | |
1146 | "1:\t" | |
1147 | "lodsl\n\t" | |
1148 | "movl %%eax, (%%edi)\n\t" | |
1149 | #else | |
1150 | "1:\t" | |
1151 | "lodsb\n\t" | |
1152 | "movb %%al, (%%edi)\n\t" | |
1153 | #endif | |
1154 | "loop 1b;" | |
1155 | /* output */ : | |
1156 | /* input */ :"D" (st0x_dr), | |
1157 | "S" | |
1158 | (data), | |
1159 | "c" (SCint->transfersize) | |
1160 | /* clobbered */ | |
1161 | : "eax", "ecx", | |
1162 | "esi"); | |
1163 | #else /* SEAGATE_USE_ASM */ | |
1164 | memcpy_toio(st0x_dr, data, transfersize); | |
1165 | #endif /* SEAGATE_USE_ASM */ | |
1166 | /* SJT: End */ | |
1167 | len -= transfersize; | |
1168 | data += transfersize; | |
1169 | DPRINTK (DEBUG_FAST, "scsi%d : FAST transfer complete len = %d data = %08x\n", hostno, len, data); | |
1170 | } else { | |
1171 | /* | |
1172 | * We loop as long as we are in a | |
1173 | * data out phase, there is data to | |
1174 | * send, and BSY is still active. | |
1175 | */ | |
1176 | ||
1177 | /* SJT: Start. Slow Write. */ | |
1178 | #ifdef SEAGATE_USE_ASM | |
1179 | ||
1180 | int __dummy_1, __dummy_2; | |
1181 | ||
1182 | /* | |
1183 | * We loop as long as we are in a data out phase, there is data to send, | |
1184 | * and BSY is still active. | |
1185 | */ | |
1186 | /* Local variables : len = ecx , data = esi, | |
1187 | st0x_cr_sr = ebx, st0x_dr = edi | |
1188 | */ | |
1189 | __asm__ ( | |
1190 | /* Test for any data here at all. */ | |
1191 | "orl %%ecx, %%ecx\n\t" | |
1192 | "jz 2f\n\t" "cld\n\t" | |
1193 | /* "movl st0x_cr_sr, %%ebx\n\t" */ | |
1194 | /* "movl st0x_dr, %%edi\n\t" */ | |
1195 | "1:\t" | |
1196 | "movb (%%ebx), %%al\n\t" | |
1197 | /* Test for BSY */ | |
1198 | "test $1, %%al\n\t" | |
1199 | "jz 2f\n\t" | |
1200 | /* Test for data out phase - STATUS & REQ_MASK should be | |
1201 | REQ_DATAOUT, which is 0. */ | |
1202 | "test $0xe, %%al\n\t" | |
1203 | "jnz 2f\n\t" | |
1204 | /* Test for REQ */ | |
1205 | "test $0x10, %%al\n\t" | |
1206 | "jz 1b\n\t" | |
1207 | "lodsb\n\t" | |
1208 | "movb %%al, (%%edi)\n\t" | |
1209 | "loop 1b\n\t" "2:\n" | |
1210 | /* output */ :"=S" (data), "=c" (len), | |
1211 | "=b" | |
1212 | (__dummy_1), | |
1213 | "=D" (__dummy_2) | |
1214 | /* input */ | |
1215 | : "0" (data), "1" (len), | |
1216 | "2" (st0x_cr_sr), | |
1217 | "3" (st0x_dr) | |
1218 | /* clobbered */ | |
1219 | : "eax"); | |
1220 | #else /* SEAGATE_USE_ASM */ | |
1221 | while (len) { | |
1222 | unsigned char stat; | |
1223 | ||
1224 | stat = STATUS; | |
1225 | if (!(stat & STAT_BSY) | |
1226 | || ((stat & REQ_MASK) != | |
1227 | REQ_DATAOUT)) | |
1228 | break; | |
1229 | if (stat & STAT_REQ) { | |
1230 | WRITE_DATA (*data++); | |
1231 | --len; | |
1232 | } | |
1233 | } | |
1234 | #endif /* SEAGATE_USE_ASM */ | |
1235 | /* SJT: End. */ | |
1236 | } | |
1237 | ||
1238 | if (!len && nobuffs) { | |
1239 | --nobuffs; | |
1240 | ++buffer; | |
1241 | len = buffer->length; | |
45711f1a | 1242 | data = sg_virt(buffer); |
1da177e4 LT |
1243 | DPRINTK (DEBUG_SG, |
1244 | "scsi%d : next scatter-gather buffer len = %d address = %08x\n", | |
1245 | hostno, len, data); | |
1246 | } | |
1247 | break; | |
1248 | ||
1249 | case REQ_DATAIN: | |
1250 | #ifdef SLOW_RATE | |
1251 | if (borken) { | |
1252 | #if (DEBUG & (PHASE_DATAIN)) | |
1253 | transfered += len; | |
1254 | #endif | |
1255 | for (; len && (STATUS & (REQ_MASK | STAT_REQ)) == (REQ_DATAIN | STAT_REQ); --len) { | |
1256 | *data++ = DATA; | |
1257 | borken_wait(); | |
1258 | } | |
1259 | #if (DEBUG & (PHASE_DATAIN)) | |
1260 | transfered -= len; | |
1261 | #endif | |
1262 | } else | |
1263 | #endif | |
1264 | ||
1265 | if (fast && transfersize | |
1266 | && !(len % transfersize) | |
1267 | && (len >= transfersize) | |
1268 | #ifdef FAST32 | |
1269 | && !(transfersize % 4) | |
1270 | #endif | |
1271 | ) { | |
1272 | DPRINTK (DEBUG_FAST, | |
1273 | "scsi%d : FAST transfer, underflow = %d, transfersize = %d\n" | |
1274 | " len = %d, data = %08x\n", | |
1275 | hostno, SCint->underflow, | |
1276 | SCint->transfersize, len, | |
1277 | data); | |
1278 | ||
1279 | /* SJT: Start. Fast Read */ | |
1280 | #ifdef SEAGATE_USE_ASM | |
1281 | __asm__ ("cld\n\t" | |
1282 | #ifdef FAST32 | |
1283 | "shr $2, %%ecx\n\t" | |
1284 | "1:\t" | |
1285 | "movl (%%esi), %%eax\n\t" | |
1286 | "stosl\n\t" | |
1287 | #else | |
1288 | "1:\t" | |
1289 | "movb (%%esi), %%al\n\t" | |
1290 | "stosb\n\t" | |
1291 | #endif | |
1292 | "loop 1b\n\t" | |
1293 | /* output */ : | |
1294 | /* input */ :"S" (st0x_dr), | |
1295 | "D" | |
1296 | (data), | |
1297 | "c" (SCint->transfersize) | |
1298 | /* clobbered */ | |
1299 | : "eax", "ecx", | |
1300 | "edi"); | |
1301 | #else /* SEAGATE_USE_ASM */ | |
1302 | memcpy_fromio(data, st0x_dr, len); | |
1303 | #endif /* SEAGATE_USE_ASM */ | |
1304 | /* SJT: End */ | |
1305 | len -= transfersize; | |
1306 | data += transfersize; | |
1307 | #if (DEBUG & PHASE_DATAIN) | |
1308 | printk ("scsi%d: transfered += %d\n", hostno, transfersize); | |
1309 | transfered += transfersize; | |
1310 | #endif | |
1311 | ||
1312 | DPRINTK (DEBUG_FAST, "scsi%d : FAST transfer complete len = %d data = %08x\n", hostno, len, data); | |
1313 | } else { | |
1314 | ||
1315 | #if (DEBUG & PHASE_DATAIN) | |
1316 | printk ("scsi%d: transfered += %d\n", hostno, len); | |
1317 | transfered += len; /* Assume we'll transfer it all, then | |
1318 | subtract what we *didn't* transfer */ | |
1319 | #endif | |
1320 | ||
1321 | /* | |
1322 | * We loop as long as we are in a data in phase, there is room to read, | |
1323 | * and BSY is still active | |
1324 | */ | |
1325 | ||
1326 | /* SJT: Start. */ | |
1327 | #ifdef SEAGATE_USE_ASM | |
1328 | ||
1329 | int __dummy_3, __dummy_4; | |
1330 | ||
1331 | /* Dummy clobbering variables for the new gcc-2.95 */ | |
1332 | ||
1333 | /* | |
1334 | * We loop as long as we are in a data in phase, there is room to read, | |
1335 | * and BSY is still active | |
1336 | */ | |
1337 | /* Local variables : ecx = len, edi = data | |
1338 | esi = st0x_cr_sr, ebx = st0x_dr */ | |
1339 | __asm__ ( | |
1340 | /* Test for room to read */ | |
1341 | "orl %%ecx, %%ecx\n\t" | |
1342 | "jz 2f\n\t" "cld\n\t" | |
1343 | /* "movl st0x_cr_sr, %%esi\n\t" */ | |
1344 | /* "movl st0x_dr, %%ebx\n\t" */ | |
1345 | "1:\t" | |
1346 | "movb (%%esi), %%al\n\t" | |
1347 | /* Test for BSY */ | |
1348 | "test $1, %%al\n\t" | |
1349 | "jz 2f\n\t" | |
1350 | /* Test for data in phase - STATUS & REQ_MASK should be REQ_DATAIN, | |
1351 | = STAT_IO, which is 4. */ | |
1352 | "movb $0xe, %%ah\n\t" | |
1353 | "andb %%al, %%ah\n\t" | |
1354 | "cmpb $0x04, %%ah\n\t" | |
1355 | "jne 2f\n\t" | |
1356 | /* Test for REQ */ | |
1357 | "test $0x10, %%al\n\t" | |
1358 | "jz 1b\n\t" | |
1359 | "movb (%%ebx), %%al\n\t" | |
1360 | "stosb\n\t" | |
1361 | "loop 1b\n\t" "2:\n" | |
1362 | /* output */ :"=D" (data), "=c" (len), | |
1363 | "=S" | |
1364 | (__dummy_3), | |
1365 | "=b" (__dummy_4) | |
1366 | /* input */ | |
1367 | : "0" (data), "1" (len), | |
1368 | "2" (st0x_cr_sr), | |
1369 | "3" (st0x_dr) | |
1370 | /* clobbered */ | |
1371 | : "eax"); | |
1372 | #else /* SEAGATE_USE_ASM */ | |
1373 | while (len) { | |
1374 | unsigned char stat; | |
1375 | ||
1376 | stat = STATUS; | |
1377 | if (!(stat & STAT_BSY) | |
1378 | || ((stat & REQ_MASK) != | |
1379 | REQ_DATAIN)) | |
1380 | break; | |
1381 | if (stat & STAT_REQ) { | |
1382 | *data++ = DATA; | |
1383 | --len; | |
1384 | } | |
1385 | } | |
1386 | #endif /* SEAGATE_USE_ASM */ | |
1387 | /* SJT: End. */ | |
1388 | #if (DEBUG & PHASE_DATAIN) | |
1389 | printk ("scsi%d: transfered -= %d\n", hostno, len); | |
1390 | transfered -= len; /* Since we assumed all of Len got * | |
1391 | transfered, correct our mistake */ | |
1392 | #endif | |
1393 | } | |
1394 | ||
1395 | if (!len && nobuffs) { | |
1396 | --nobuffs; | |
1397 | ++buffer; | |
1398 | len = buffer->length; | |
45711f1a | 1399 | data = sg_virt(buffer); |
1da177e4 LT |
1400 | DPRINTK (DEBUG_SG, "scsi%d : next scatter-gather buffer len = %d address = %08x\n", hostno, len, data); |
1401 | } | |
1402 | break; | |
1403 | ||
1404 | case REQ_CMDOUT: | |
1405 | while (((status_read = STATUS) & STAT_BSY) && | |
1406 | ((status_read & REQ_MASK) == REQ_CMDOUT)) | |
1407 | if (status_read & STAT_REQ) { | |
1408 | WRITE_DATA (*(const unsigned char *) cmnd); | |
1409 | cmnd = 1 + (const unsigned char *)cmnd; | |
1410 | #ifdef SLOW_RATE | |
1411 | if (borken) | |
1412 | borken_wait (); | |
1413 | #endif | |
1414 | } | |
1415 | break; | |
1416 | ||
1417 | case REQ_STATIN: | |
1418 | status = DATA; | |
1419 | break; | |
1420 | ||
1421 | case REQ_MSGOUT: | |
1422 | /* | |
1423 | * We can only have sent a MSG OUT if we | |
1424 | * requested to do this by raising ATTN. | |
1425 | * So, we must drop ATTN. | |
1426 | */ | |
1427 | WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE); | |
1428 | /* | |
1429 | * If we are reconnecting, then we must | |
1430 | * send an IDENTIFY message in response | |
1431 | * to MSGOUT. | |
1432 | */ | |
1433 | switch (reselect) { | |
1434 | case CAN_RECONNECT: | |
1435 | WRITE_DATA (IDENTIFY (1, lun)); | |
1436 | DPRINTK (PHASE_RESELECT | PHASE_MSGOUT, "scsi%d : sent IDENTIFY message.\n", hostno); | |
1437 | break; | |
1438 | #ifdef LINKED | |
1439 | case LINKED_WRONG: | |
1440 | WRITE_DATA (ABORT); | |
1441 | linked_connected = 0; | |
1442 | reselect = CAN_RECONNECT; | |
1443 | goto connect_loop; | |
1444 | DPRINTK (PHASE_MSGOUT | DEBUG_LINKED, "scsi%d : sent ABORT message to cancel incorrect I_T_L nexus.\n", hostno); | |
1445 | #endif /* LINKED */ | |
1446 | DPRINTK (DEBUG_LINKED, "correct\n"); | |
1447 | default: | |
1448 | WRITE_DATA (NOP); | |
1449 | printk("scsi%d : target %d requested MSGOUT, sent NOP message.\n", hostno, target); | |
1450 | } | |
1451 | break; | |
1452 | ||
1453 | case REQ_MSGIN: | |
1454 | switch (message = DATA) { | |
1455 | case DISCONNECT: | |
1456 | DANY("seagate: deciding to disconnect\n"); | |
1457 | should_reconnect = 1; | |
1458 | current_data = data; /* WDE add */ | |
1459 | current_buffer = buffer; | |
1460 | current_bufflen = len; /* WDE add */ | |
1461 | current_nobuffs = nobuffs; | |
1462 | #ifdef LINKED | |
1463 | linked_connected = 0; | |
1464 | #endif | |
1465 | done = 1; | |
1466 | DPRINTK ((PHASE_RESELECT | PHASE_MSGIN), "scsi%d : disconnected.\n", hostno); | |
1467 | break; | |
1468 | ||
1469 | #ifdef LINKED | |
1470 | case LINKED_CMD_COMPLETE: | |
1471 | case LINKED_FLG_CMD_COMPLETE: | |
1472 | #endif | |
1473 | case COMMAND_COMPLETE: | |
1474 | /* | |
1475 | * Note : we should check for underflow here. | |
1476 | */ | |
1477 | DPRINTK(PHASE_MSGIN, "scsi%d : command complete.\n", hostno); | |
1478 | done = 1; | |
1479 | break; | |
1480 | case ABORT: | |
1481 | DPRINTK(PHASE_MSGIN, "scsi%d : abort message.\n", hostno); | |
1482 | done = 1; | |
1483 | break; | |
1484 | case SAVE_POINTERS: | |
1485 | current_buffer = buffer; | |
1486 | current_bufflen = len; /* WDE add */ | |
1487 | current_data = data; /* WDE mod */ | |
1488 | current_nobuffs = nobuffs; | |
1489 | DPRINTK (PHASE_MSGIN, "scsi%d : pointers saved.\n", hostno); | |
1490 | break; | |
1491 | case RESTORE_POINTERS: | |
1492 | buffer = current_buffer; | |
1493 | cmnd = current_cmnd; | |
1494 | data = current_data; /* WDE mod */ | |
1495 | len = current_bufflen; | |
1496 | nobuffs = current_nobuffs; | |
1497 | DPRINTK(PHASE_MSGIN, "scsi%d : pointers restored.\n", hostno); | |
1498 | break; | |
1499 | default: | |
1500 | ||
1501 | /* | |
1502 | * IDENTIFY distinguishes itself | |
1503 | * from the other messages by | |
1504 | * setting the high bit. | |
1505 | * | |
1506 | * Note : we need to handle at | |
1507 | * least one outstanding command | |
1508 | * per LUN, and need to hash the | |
1509 | * SCSI command for that I_T_L | |
1510 | * nexus based on the known ID | |
1511 | * (at this point) and LUN. | |
1512 | */ | |
1513 | ||
1514 | if (message & 0x80) { | |
1515 | DPRINTK (PHASE_MSGIN, "scsi%d : IDENTIFY message received from id %d, lun %d.\n", hostno, target, message & 7); | |
1516 | } else { | |
1517 | /* | |
1518 | * We should go into a | |
1519 | * MESSAGE OUT phase, and | |
1520 | * send a MESSAGE_REJECT | |
1521 | * if we run into a message | |
1522 | * that we don't like. The | |
1523 | * seagate driver needs | |
1524 | * some serious | |
1525 | * restructuring first | |
1526 | * though. | |
1527 | */ | |
1528 | DPRINTK (PHASE_MSGIN, "scsi%d : unknown message %d from target %d.\n", hostno, message, target); | |
1529 | } | |
1530 | } | |
1531 | break; | |
1532 | default: | |
1533 | printk(KERN_ERR "scsi%d : unknown phase.\n", hostno); | |
1534 | st0x_aborted = DID_ERROR; | |
1535 | } /* end of switch (status_read & REQ_MASK) */ | |
1536 | #ifdef SLOW_RATE | |
1537 | /* | |
1538 | * I really don't care to deal with borken devices in | |
1539 | * each single byte transfer case (ie, message in, | |
1540 | * message out, status), so I'll do the wait here if | |
1541 | * necessary. | |
1542 | */ | |
1543 | if(borken) | |
1544 | borken_wait(); | |
1545 | #endif | |
1546 | ||
1547 | } /* if(status_read & STAT_REQ) ends */ | |
1548 | } /* while(((status_read = STATUS)...) ends */ | |
1549 | ||
1550 | DPRINTK(PHASE_DATAIN | PHASE_DATAOUT | PHASE_EXIT, "scsi%d : Transfered %d bytes\n", hostno, transfered); | |
1551 | ||
1552 | #if (DEBUG & PHASE_EXIT) | |
1553 | #if 0 /* Doesn't work for scatter/gather */ | |
1554 | printk("Buffer : \n"); | |
1555 | for(i = 0; i < 20; ++i) | |
1556 | printk("%02x ", ((unsigned char *) data)[i]); /* WDE mod */ | |
1557 | printk("\n"); | |
1558 | #endif | |
1559 | printk("scsi%d : status = ", hostno); | |
db9dff36 | 1560 | scsi_print_status(status); |
1da177e4 LT |
1561 | printk(" message = %02x\n", message); |
1562 | #endif | |
1563 | ||
1564 | /* We shouldn't reach this until *after* BSY has been deasserted */ | |
1565 | ||
1566 | #ifdef LINKED | |
1567 | else | |
1568 | { | |
1569 | /* | |
1570 | * Fix the message byte so that unsuspecting high level drivers | |
1571 | * don't puke when they see a LINKED COMMAND message in place of | |
1572 | * the COMMAND COMPLETE they may be expecting. Shouldn't be | |
1573 | * necessary, but it's better to be on the safe side. | |
1574 | * | |
1575 | * A non LINKED* message byte will indicate that the command | |
1576 | * completed, and we are now disconnected. | |
1577 | */ | |
1578 | ||
1579 | switch (message) { | |
1580 | case LINKED_CMD_COMPLETE: | |
1581 | case LINKED_FLG_CMD_COMPLETE: | |
1582 | message = COMMAND_COMPLETE; | |
1583 | linked_target = current_target; | |
1584 | linked_lun = current_lun; | |
1585 | linked_connected = 1; | |
1586 | DPRINTK (DEBUG_LINKED, "scsi%d : keeping I_T_L nexus established for linked command.\n", hostno); | |
1587 | /* We also will need to adjust status to accommodate intermediate | |
1588 | conditions. */ | |
1589 | if ((status == INTERMEDIATE_GOOD) || (status == INTERMEDIATE_C_GOOD)) | |
1590 | status = GOOD; | |
1591 | break; | |
1592 | /* | |
1593 | * We should also handle what are "normal" termination | |
1594 | * messages here (ABORT, BUS_DEVICE_RESET?, and | |
1595 | * COMMAND_COMPLETE individually, and flake if things | |
1596 | * aren't right. | |
1597 | */ | |
1598 | default: | |
1599 | DPRINTK (DEBUG_LINKED, "scsi%d : closing I_T_L nexus.\n", hostno); | |
1600 | linked_connected = 0; | |
1601 | } | |
1602 | } | |
1603 | #endif /* LINKED */ | |
1604 | ||
1605 | if (should_reconnect) { | |
1606 | DPRINTK (PHASE_RESELECT, "scsi%d : exiting seagate_st0x_queue_command() with reconnect enabled.\n", hostno); | |
1607 | WRITE_CONTROL (BASE_CMD | CMD_INTR); | |
1608 | } else | |
1609 | WRITE_CONTROL (BASE_CMD); | |
1610 | ||
1611 | return retcode (st0x_aborted); | |
1612 | } /* end of internal_command */ | |
1613 | ||
d7694f8c | 1614 | static int seagate_st0x_abort(struct scsi_cmnd * SCpnt) |
1da177e4 LT |
1615 | { |
1616 | st0x_aborted = DID_ABORT; | |
1617 | return SUCCESS; | |
1618 | } | |
1619 | ||
1620 | #undef ULOOP | |
1621 | #undef TIMEOUT | |
1622 | ||
1623 | /* | |
1624 | * the seagate_st0x_reset function resets the SCSI bus | |
1625 | * | |
1626 | * May be called with SCpnt = NULL | |
1627 | */ | |
1628 | ||
d7694f8c | 1629 | static int seagate_st0x_bus_reset(struct scsi_cmnd * SCpnt) |
1da177e4 LT |
1630 | { |
1631 | /* No timeouts - this command is going to fail because it was reset. */ | |
1632 | DANY ("scsi%d: Reseting bus... ", hostno); | |
1633 | ||
1634 | /* assert RESET signal on SCSI bus. */ | |
1635 | WRITE_CONTROL (BASE_CMD | CMD_RST); | |
1636 | ||
68b3aa7c | 1637 | mdelay (20); |
1da177e4 LT |
1638 | |
1639 | WRITE_CONTROL (BASE_CMD); | |
1640 | st0x_aborted = DID_RESET; | |
1641 | ||
1642 | DANY ("done.\n"); | |
1643 | return SUCCESS; | |
1644 | } | |
1645 | ||
1da177e4 LT |
1646 | static int seagate_st0x_release(struct Scsi_Host *shost) |
1647 | { | |
1648 | if (shost->irq) | |
1649 | free_irq(shost->irq, shost); | |
1650 | release_region(shost->io_port, shost->n_io_port); | |
1651 | return 0; | |
1652 | } | |
1653 | ||
d0be4a7d | 1654 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
1655 | .detect = seagate_st0x_detect, |
1656 | .release = seagate_st0x_release, | |
1657 | .info = seagate_st0x_info, | |
1658 | .queuecommand = seagate_st0x_queue_command, | |
1659 | .eh_abort_handler = seagate_st0x_abort, | |
1660 | .eh_bus_reset_handler = seagate_st0x_bus_reset, | |
1da177e4 LT |
1661 | .can_queue = 1, |
1662 | .this_id = 7, | |
1663 | .sg_tablesize = SG_ALL, | |
1664 | .cmd_per_lun = 1, | |
1665 | .use_clustering = DISABLE_CLUSTERING, | |
1666 | }; | |
1667 | #include "scsi_module.c" |