Commit | Line | Data |
---|---|---|
594c16d8 BZ |
1 | /* |
2 | * ATAPI support. | |
3 | */ | |
4 | ||
5 | #include <linux/kernel.h> | |
4cad085e | 6 | #include <linux/cdrom.h> |
594c16d8 BZ |
7 | #include <linux/delay.h> |
8 | #include <linux/ide.h> | |
479edf06 GU |
9 | #include <linux/scatterlist.h> |
10 | ||
646c0cb6 BZ |
11 | #include <scsi/scsi.h> |
12 | ||
13 | #ifdef DEBUG | |
14 | #define debug_log(fmt, args...) \ | |
15 | printk(KERN_INFO "ide: " fmt, ## args) | |
16 | #else | |
17 | #define debug_log(fmt, args...) do {} while (0) | |
18 | #endif | |
19 | ||
8c662852 BP |
20 | #define ATAPI_MIN_CDB_BYTES 12 |
21 | ||
991cb26a BP |
22 | static inline int dev_is_idecd(ide_drive_t *drive) |
23 | { | |
5317464d | 24 | return drive->media == ide_cdrom || drive->media == ide_optical; |
991cb26a BP |
25 | } |
26 | ||
51509eec BZ |
27 | /* |
28 | * Check whether we can support a device, | |
29 | * based on the ATAPI IDENTIFY command results. | |
30 | */ | |
31 | int ide_check_atapi_device(ide_drive_t *drive, const char *s) | |
32 | { | |
33 | u16 *id = drive->id; | |
34 | u8 gcw[2], protocol, device_type, removable, drq_type, packet_size; | |
35 | ||
36 | *((u16 *)&gcw) = id[ATA_ID_CONFIG]; | |
37 | ||
38 | protocol = (gcw[1] & 0xC0) >> 6; | |
39 | device_type = gcw[1] & 0x1F; | |
40 | removable = (gcw[0] & 0x80) >> 7; | |
41 | drq_type = (gcw[0] & 0x60) >> 5; | |
42 | packet_size = gcw[0] & 0x03; | |
43 | ||
44 | #ifdef CONFIG_PPC | |
45 | /* kludge for Apple PowerBook internal zip */ | |
46 | if (drive->media == ide_floppy && device_type == 5 && | |
47 | !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && | |
48 | strstr((char *)&id[ATA_ID_PROD], "ZIP")) | |
49 | device_type = 0; | |
50 | #endif | |
51 | ||
52 | if (protocol != 2) | |
53 | printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n", | |
54 | s, drive->name, protocol); | |
55 | else if ((drive->media == ide_floppy && device_type != 0) || | |
56 | (drive->media == ide_tape && device_type != 1)) | |
57 | printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n", | |
58 | s, drive->name, device_type); | |
59 | else if (removable == 0) | |
60 | printk(KERN_ERR "%s: %s: the removable flag is not set\n", | |
61 | s, drive->name); | |
62 | else if (drive->media == ide_floppy && drq_type == 3) | |
63 | printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not " | |
64 | "supported\n", s, drive->name, drq_type); | |
65 | else if (packet_size != 0) | |
66 | printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 " | |
67 | "bytes\n", s, drive->name, packet_size); | |
68 | else | |
69 | return 1; | |
70 | return 0; | |
71 | } | |
72 | EXPORT_SYMBOL_GPL(ide_check_atapi_device); | |
73 | ||
acaa0f5f BZ |
74 | /* PIO data transfer routine using the scatter gather table. */ |
75 | int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, | |
76 | unsigned int bcount, int write) | |
77 | { | |
78 | ide_hwif_t *hwif = drive->hwif; | |
79 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; | |
80 | xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data; | |
81 | struct scatterlist *sg = pc->sg; | |
82 | char *buf; | |
83 | int count, done = 0; | |
84 | ||
85 | while (bcount) { | |
86 | count = min(sg->length - pc->b_count, bcount); | |
87 | ||
88 | if (PageHighMem(sg_page(sg))) { | |
89 | unsigned long flags; | |
90 | ||
91 | local_irq_save(flags); | |
92 | buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset; | |
93 | xf(drive, NULL, buf + pc->b_count, count); | |
94 | kunmap_atomic(buf - sg->offset, KM_IRQ0); | |
95 | local_irq_restore(flags); | |
96 | } else { | |
97 | buf = sg_virt(sg); | |
98 | xf(drive, NULL, buf + pc->b_count, count); | |
99 | } | |
100 | ||
101 | bcount -= count; | |
102 | pc->b_count += count; | |
103 | done += count; | |
104 | ||
105 | if (pc->b_count == sg->length) { | |
106 | if (!--pc->sg_cnt) | |
107 | break; | |
108 | pc->sg = sg = sg_next(sg); | |
109 | pc->b_count = 0; | |
110 | } | |
111 | } | |
112 | ||
113 | if (bcount) { | |
114 | printk(KERN_ERR "%s: %d leftover bytes, %s\n", drive->name, | |
115 | bcount, write ? "padding with zeros" | |
116 | : "discarding data"); | |
117 | ide_pad_transfer(drive, write, bcount); | |
118 | } | |
119 | ||
120 | return done; | |
121 | } | |
122 | EXPORT_SYMBOL_GPL(ide_io_buffers); | |
123 | ||
7bf7420a BZ |
124 | void ide_init_pc(struct ide_atapi_pc *pc) |
125 | { | |
126 | memset(pc, 0, sizeof(*pc)); | |
127 | pc->buf = pc->pc_buf; | |
128 | pc->buf_size = IDE_PC_BUFFER_SIZE; | |
129 | } | |
130 | EXPORT_SYMBOL_GPL(ide_init_pc); | |
131 | ||
7645c151 BZ |
132 | /* |
133 | * Generate a new packet command request in front of the request queue, before | |
134 | * the current request, so that it will be processed immediately, on the next | |
135 | * pass through the driver. | |
136 | */ | |
6b0da28b BZ |
137 | static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk, |
138 | struct ide_atapi_pc *pc, struct request *rq) | |
7645c151 BZ |
139 | { |
140 | blk_rq_init(NULL, rq); | |
141 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
142 | rq->cmd_flags |= REQ_PREEMPT; | |
143 | rq->buffer = (char *)pc; | |
144 | rq->rq_disk = disk; | |
3eb76c1c BP |
145 | |
146 | if (pc->req_xfer) { | |
147 | rq->data = pc->buf; | |
148 | rq->data_len = pc->req_xfer; | |
149 | } | |
150 | ||
7645c151 BZ |
151 | memcpy(rq->cmd, pc->c, 12); |
152 | if (drive->media == ide_tape) | |
153 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
18660823 BZ |
154 | |
155 | drive->hwif->rq = NULL; | |
156 | ||
157 | elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0); | |
7645c151 | 158 | } |
7645c151 | 159 | |
2ac07d92 BZ |
160 | /* |
161 | * Add a special packet command request to the tail of the request queue, | |
162 | * and wait for it to be serviced. | |
163 | */ | |
164 | int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, | |
165 | struct ide_atapi_pc *pc) | |
166 | { | |
167 | struct request *rq; | |
168 | int error; | |
169 | ||
170 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
171 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
172 | rq->buffer = (char *)pc; | |
3eb76c1c BP |
173 | |
174 | if (pc->req_xfer) { | |
175 | rq->data = pc->buf; | |
176 | rq->data_len = pc->req_xfer; | |
177 | } | |
178 | ||
2ac07d92 BZ |
179 | memcpy(rq->cmd, pc->c, 12); |
180 | if (drive->media == ide_tape) | |
181 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
182 | error = blk_execute_rq(drive->queue, disk, rq, 0); | |
183 | blk_put_request(rq); | |
184 | ||
185 | return error; | |
186 | } | |
187 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
188 | ||
de699ad5 BZ |
189 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
190 | { | |
191 | struct ide_atapi_pc pc; | |
192 | ||
193 | ide_init_pc(&pc); | |
194 | pc.c[0] = TEST_UNIT_READY; | |
195 | ||
196 | return ide_queue_pc_tail(drive, disk, &pc); | |
197 | } | |
198 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
199 | ||
0c8a6c7a BZ |
200 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
201 | { | |
202 | struct ide_atapi_pc pc; | |
203 | ||
204 | ide_init_pc(&pc); | |
205 | pc.c[0] = START_STOP; | |
206 | pc.c[4] = start; | |
207 | ||
208 | if (drive->media == ide_tape) | |
209 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
210 | ||
211 | return ide_queue_pc_tail(drive, disk, &pc); | |
212 | } | |
213 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
214 | ||
0578042d BZ |
215 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
216 | { | |
217 | struct ide_atapi_pc pc; | |
218 | ||
42619d35 | 219 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
0578042d BZ |
220 | return 0; |
221 | ||
222 | ide_init_pc(&pc); | |
223 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
224 | pc.c[4] = on; | |
225 | ||
226 | return ide_queue_pc_tail(drive, disk, &pc); | |
227 | } | |
228 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
229 | ||
6b0da28b BZ |
230 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
231 | { | |
232 | ide_init_pc(pc); | |
233 | pc->c[0] = REQUEST_SENSE; | |
234 | if (drive->media == ide_floppy) { | |
235 | pc->c[4] = 255; | |
236 | pc->req_xfer = 18; | |
237 | } else { | |
238 | pc->c[4] = 20; | |
239 | pc->req_xfer = 20; | |
240 | } | |
241 | } | |
242 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
243 | ||
244 | /* | |
245 | * Called when an error was detected during the last packet command. | |
246 | * We queue a request sense packet command in the head of the request list. | |
247 | */ | |
248 | void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk) | |
249 | { | |
250 | struct request *rq = &drive->request_sense_rq; | |
251 | struct ide_atapi_pc *pc = &drive->request_sense_pc; | |
252 | ||
253 | (void)ide_read_error(drive); | |
254 | ide_create_request_sense_cmd(drive, pc); | |
255 | if (drive->media == ide_tape) | |
256 | set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags); | |
257 | ide_queue_pc_head(drive, disk, pc, rq); | |
258 | } | |
259 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
260 | ||
4cad085e BP |
261 | int ide_cd_expiry(ide_drive_t *drive) |
262 | { | |
b65fac32 | 263 | struct request *rq = drive->hwif->rq; |
4cad085e BP |
264 | unsigned long wait = 0; |
265 | ||
266 | debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]); | |
267 | ||
268 | /* | |
269 | * Some commands are *slow* and normally take a long time to complete. | |
270 | * Usually we can use the ATAPI "disconnect" to bypass this, but not all | |
271 | * commands/drives support that. Let ide_timer_expiry keep polling us | |
272 | * for these. | |
273 | */ | |
274 | switch (rq->cmd[0]) { | |
275 | case GPCMD_BLANK: | |
276 | case GPCMD_FORMAT_UNIT: | |
277 | case GPCMD_RESERVE_RZONE_TRACK: | |
278 | case GPCMD_CLOSE_TRACK: | |
279 | case GPCMD_FLUSH_CACHE: | |
280 | wait = ATAPI_WAIT_PC; | |
281 | break; | |
282 | default: | |
283 | if (!(rq->cmd_flags & REQ_QUIET)) | |
284 | printk(KERN_INFO "cmd 0x%x timed out\n", | |
285 | rq->cmd[0]); | |
286 | wait = 0; | |
287 | break; | |
288 | } | |
289 | return wait; | |
290 | } | |
291 | EXPORT_SYMBOL_GPL(ide_cd_expiry); | |
292 | ||
392de1d5 BP |
293 | int ide_cd_get_xferlen(struct request *rq) |
294 | { | |
295 | if (blk_fs_request(rq)) | |
296 | return 32768; | |
297 | else if (blk_sense_request(rq) || blk_pc_request(rq) || | |
298 | rq->cmd_type == REQ_TYPE_ATA_PC) | |
299 | return rq->data_len; | |
300 | else | |
301 | return 0; | |
302 | } | |
303 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); | |
304 | ||
0d6a9754 BZ |
305 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
306 | { | |
22aa4b32 | 307 | struct ide_cmd cmd; |
0d6a9754 | 308 | |
22aa4b32 BZ |
309 | memset(&cmd, 0, sizeof(cmd)); |
310 | cmd.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM | | |
311 | IDE_TFLAG_IN_NSECT; | |
0d6a9754 | 312 | |
22aa4b32 | 313 | drive->hwif->tp_ops->tf_read(drive, &cmd); |
0d6a9754 | 314 | |
22aa4b32 BZ |
315 | *bcount = (cmd.tf.lbah << 8) | cmd.tf.lbam; |
316 | *ireason = cmd.tf.nsect & 3; | |
0d6a9754 BZ |
317 | } |
318 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
319 | ||
aa5d2de7 BZ |
320 | /* |
321 | * This is the usual interrupt handler which will be called during a packet | |
322 | * command. We will transfer some of the data (as requested by the drive) | |
323 | * and will re-point interrupt handler to us. | |
324 | */ | |
325 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 326 | { |
2b9efba4 | 327 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 328 | ide_hwif_t *hwif = drive->hwif; |
b65fac32 | 329 | struct request *rq = hwif->rq; |
374e042c | 330 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
646c0cb6 | 331 | xfer_func_t *xferfunc; |
844b9468 | 332 | unsigned int timeout, temp; |
646c0cb6 | 333 | u16 bcount; |
5d655a03 | 334 | u8 stat, ireason, dsc = 0; |
646c0cb6 BZ |
335 | |
336 | debug_log("Enter %s - interrupt handler\n", __func__); | |
337 | ||
5d655a03 BP |
338 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
339 | : WAIT_TAPE_CMD; | |
844b9468 | 340 | |
646c0cb6 | 341 | /* Clear the interrupt */ |
374e042c | 342 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
343 | |
344 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
345 | if (hwif->dma_ops->dma_end(drive) || | |
5d655a03 BP |
346 | (drive->media == ide_tape && (stat & ATA_ERR))) { |
347 | if (drive->media == ide_floppy) | |
646c0cb6 BZ |
348 | printk(KERN_ERR "%s: DMA %s error\n", |
349 | drive->name, rq_data_dir(pc->rq) | |
350 | ? "write" : "read"); | |
351 | pc->flags |= PC_FLAG_DMA_ERROR; | |
352 | } else { | |
353 | pc->xferred = pc->req_xfer; | |
85e39035 BZ |
354 | if (drive->pc_update_buffers) |
355 | drive->pc_update_buffers(drive, pc); | |
646c0cb6 BZ |
356 | } |
357 | debug_log("%s: DMA finished\n", drive->name); | |
358 | } | |
359 | ||
360 | /* No more interrupts */ | |
3a7d2484 | 361 | if ((stat & ATA_DRQ) == 0) { |
03a2faae BZ |
362 | int uptodate; |
363 | ||
646c0cb6 BZ |
364 | debug_log("Packet command completed, %d bytes transferred\n", |
365 | pc->xferred); | |
366 | ||
367 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
368 | ||
369 | local_irq_enable_in_hardirq(); | |
370 | ||
5d655a03 | 371 | if (drive->media == ide_tape && |
3a7d2484 BZ |
372 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
373 | stat &= ~ATA_ERR; | |
8fccf899 | 374 | |
3a7d2484 | 375 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
376 | /* Error detected */ |
377 | debug_log("%s: I/O error\n", drive->name); | |
378 | ||
5d655a03 | 379 | if (drive->media != ide_tape) |
646c0cb6 | 380 | pc->rq->errors++; |
646c0cb6 | 381 | |
8fccf899 | 382 | if (rq->cmd[0] == REQUEST_SENSE) { |
646c0cb6 BZ |
383 | printk(KERN_ERR "%s: I/O error in request sense" |
384 | " command\n", drive->name); | |
385 | return ide_do_reset(drive); | |
386 | } | |
387 | ||
8fccf899 | 388 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
389 | |
390 | /* Retry operation */ | |
6b0da28b | 391 | ide_retry_pc(drive, rq->rq_disk); |
8fccf899 | 392 | |
646c0cb6 BZ |
393 | /* queued, but not started */ |
394 | return ide_stopped; | |
395 | } | |
646c0cb6 | 396 | pc->error = 0; |
b14c7212 BZ |
397 | |
398 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
399 | dsc = 1; | |
8fccf899 | 400 | |
646c0cb6 | 401 | /* Command finished - Call the callback function */ |
03a2faae BZ |
402 | uptodate = drive->pc_callback(drive, dsc); |
403 | ||
404 | if (uptodate == 0) | |
405 | drive->failed_pc = NULL; | |
406 | ||
6902a533 BZ |
407 | if (blk_special_request(rq)) { |
408 | rq->errors = 0; | |
f974b196 | 409 | ide_complete_rq(drive, 0, blk_rq_bytes(rq)); |
89f78b32 BZ |
410 | } else { |
411 | if (blk_fs_request(rq) == 0 && uptodate <= 0) { | |
412 | if (rq->errors == 0) | |
413 | rq->errors = -EIO; | |
414 | } | |
130e8867 BZ |
415 | ide_complete_rq(drive, uptodate ? 0 : -EIO, |
416 | ide_rq_bytes(rq)); | |
89f78b32 | 417 | } |
8fccf899 | 418 | |
646c0cb6 BZ |
419 | return ide_stopped; |
420 | } | |
421 | ||
422 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
423 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
424 | printk(KERN_ERR "%s: The device wants to issue more interrupts " | |
425 | "in DMA mode\n", drive->name); | |
426 | ide_dma_off(drive); | |
427 | return ide_do_reset(drive); | |
428 | } | |
646c0cb6 | 429 | |
1823649b BZ |
430 | /* Get the number of bytes to transfer on this interrupt. */ |
431 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 432 | |
3a7d2484 | 433 | if (ireason & ATAPI_COD) { |
646c0cb6 BZ |
434 | printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
435 | return ide_do_reset(drive); | |
436 | } | |
8fccf899 | 437 | |
3a7d2484 BZ |
438 | if (((ireason & ATAPI_IO) == ATAPI_IO) == |
439 | !!(pc->flags & PC_FLAG_WRITING)) { | |
646c0cb6 BZ |
440 | /* Hopefully, we will never get here */ |
441 | printk(KERN_ERR "%s: We wanted to %s, but the device wants us " | |
442 | "to %s!\n", drive->name, | |
3a7d2484 BZ |
443 | (ireason & ATAPI_IO) ? "Write" : "Read", |
444 | (ireason & ATAPI_IO) ? "Read" : "Write"); | |
646c0cb6 BZ |
445 | return ide_do_reset(drive); |
446 | } | |
8fccf899 | 447 | |
646c0cb6 BZ |
448 | if (!(pc->flags & PC_FLAG_WRITING)) { |
449 | /* Reading - Check that we have enough space */ | |
450 | temp = pc->xferred + bcount; | |
451 | if (temp > pc->req_xfer) { | |
452 | if (temp > pc->buf_size) { | |
453 | printk(KERN_ERR "%s: The device wants to send " | |
454 | "us more data than expected - " | |
455 | "discarding data\n", | |
456 | drive->name); | |
5d655a03 BP |
457 | |
458 | ide_pad_transfer(drive, 0, bcount); | |
844b9468 | 459 | goto next_irq; |
646c0cb6 BZ |
460 | } |
461 | debug_log("The device wants to send us more data than " | |
462 | "expected - allowing transfer\n"); | |
463 | } | |
374e042c | 464 | xferfunc = tp_ops->input_data; |
646c0cb6 | 465 | } else |
374e042c | 466 | xferfunc = tp_ops->output_data; |
646c0cb6 | 467 | |
5d655a03 BP |
468 | if ((drive->media == ide_floppy && !pc->buf) || |
469 | (drive->media == ide_tape && pc->bh)) { | |
85e39035 | 470 | int done = drive->pc_io_buffers(drive, pc, bcount, |
acaa0f5f BZ |
471 | !!(pc->flags & PC_FLAG_WRITING)); |
472 | ||
473 | /* FIXME: don't do partial completions */ | |
5d655a03 | 474 | if (drive->media == ide_floppy) |
130e8867 BZ |
475 | ide_complete_rq(drive, 0, |
476 | done ? done : ide_rq_bytes(rq)); | |
acaa0f5f | 477 | } else |
646c0cb6 BZ |
478 | xferfunc(drive, NULL, pc->cur_pos, bcount); |
479 | ||
480 | /* Update the current position */ | |
481 | pc->xferred += bcount; | |
482 | pc->cur_pos += bcount; | |
483 | ||
484 | debug_log("[cmd %x] transferred %d bytes on that intr.\n", | |
8fccf899 | 485 | rq->cmd[0], bcount); |
844b9468 | 486 | next_irq: |
646c0cb6 | 487 | /* And set the interrupt handler again */ |
60c0cd02 | 488 | ide_set_handler(drive, ide_pc_intr, timeout); |
646c0cb6 BZ |
489 | return ide_started; |
490 | } | |
594c16d8 | 491 | |
b788ee9c BZ |
492 | static void ide_init_packet_cmd(struct ide_cmd *cmd, u32 tf_flags, |
493 | u16 bcount, u8 dma) | |
7a254df0 | 494 | { |
b788ee9c BZ |
495 | cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO; |
496 | cmd->tf_flags |= IDE_TFLAG_OUT_LBAH | IDE_TFLAG_OUT_LBAM | | |
497 | IDE_TFLAG_OUT_FEATURE | tf_flags; | |
35b5d0be | 498 | cmd->tf.command = ATA_CMD_PACKET; |
b788ee9c BZ |
499 | cmd->tf.feature = dma; /* Use PIO/DMA */ |
500 | cmd->tf.lbam = bcount & 0xff; | |
501 | cmd->tf.lbah = (bcount >> 8) & 0xff; | |
7a254df0 BZ |
502 | } |
503 | ||
88a72109 BZ |
504 | static u8 ide_read_ireason(ide_drive_t *drive) |
505 | { | |
22aa4b32 | 506 | struct ide_cmd cmd; |
88a72109 | 507 | |
22aa4b32 BZ |
508 | memset(&cmd, 0, sizeof(cmd)); |
509 | cmd.tf_flags = IDE_TFLAG_IN_NSECT; | |
88a72109 | 510 | |
22aa4b32 | 511 | drive->hwif->tp_ops->tf_read(drive, &cmd); |
88a72109 | 512 | |
22aa4b32 | 513 | return cmd.tf.nsect & 3; |
88a72109 BZ |
514 | } |
515 | ||
594c16d8 BZ |
516 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
517 | { | |
594c16d8 BZ |
518 | int retries = 100; |
519 | ||
3a7d2484 BZ |
520 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
521 | (ireason & ATAPI_IO))) { | |
594c16d8 BZ |
522 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " |
523 | "a packet command, retrying\n", drive->name); | |
524 | udelay(100); | |
88a72109 | 525 | ireason = ide_read_ireason(drive); |
594c16d8 BZ |
526 | if (retries == 0) { |
527 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " | |
528 | "a packet command, ignoring\n", | |
529 | drive->name); | |
3a7d2484 BZ |
530 | ireason |= ATAPI_COD; |
531 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
532 | } |
533 | } | |
534 | ||
535 | return ireason; | |
536 | } | |
537 | ||
baf08f0b BZ |
538 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
539 | { | |
540 | /* Send the actual packet */ | |
541 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); | |
542 | ||
543 | /* Timeout for the packet command */ | |
544 | return WAIT_FLOPPY_CMD; | |
545 | } | |
546 | ||
547 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) | |
594c16d8 | 548 | { |
b16aabc9 | 549 | struct ide_atapi_pc *uninitialized_var(pc); |
594c16d8 | 550 | ide_hwif_t *hwif = drive->hwif; |
b65fac32 | 551 | struct request *rq = hwif->rq; |
baf08f0b BZ |
552 | ide_expiry_t *expiry; |
553 | unsigned int timeout; | |
8c662852 | 554 | int cmd_len; |
594c16d8 BZ |
555 | ide_startstop_t startstop; |
556 | u8 ireason; | |
557 | ||
3a7d2484 | 558 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
594c16d8 BZ |
559 | printk(KERN_ERR "%s: Strange, packet command initiated yet " |
560 | "DRQ isn't asserted\n", drive->name); | |
561 | return startstop; | |
562 | } | |
563 | ||
5f25843f BP |
564 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
565 | if (drive->dma) | |
566 | drive->waiting_for_dma = 1; | |
567 | } | |
568 | ||
8c662852 BP |
569 | if (dev_is_idecd(drive)) { |
570 | /* ATAPI commands get padded out to 12 bytes minimum */ | |
571 | cmd_len = COMMAND_SIZE(rq->cmd[0]); | |
572 | if (cmd_len < ATAPI_MIN_CDB_BYTES) | |
573 | cmd_len = ATAPI_MIN_CDB_BYTES; | |
8c662852 | 574 | |
def860d0 BP |
575 | timeout = rq->timeout; |
576 | expiry = ide_cd_expiry; | |
baf08f0b | 577 | } else { |
b16aabc9 BP |
578 | pc = drive->pc; |
579 | ||
def860d0 BP |
580 | cmd_len = ATAPI_MIN_CDB_BYTES; |
581 | ||
582 | /* | |
583 | * If necessary schedule the packet transfer to occur 'timeout' | |
584 | * miliseconds later in ide_delayed_transfer_pc() after the | |
585 | * device says it's ready for a packet. | |
586 | */ | |
587 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { | |
588 | timeout = drive->pc_delay; | |
589 | expiry = &ide_delayed_transfer_pc; | |
590 | } else { | |
591 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
592 | : WAIT_TAPE_CMD; | |
593 | expiry = NULL; | |
594 | } | |
06cc2778 BP |
595 | |
596 | ireason = ide_read_ireason(drive); | |
597 | if (drive->media == ide_tape) | |
598 | ireason = ide_wait_ireason(drive, ireason); | |
599 | ||
600 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { | |
601 | printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing " | |
602 | "a packet command\n", drive->name); | |
603 | ||
604 | return ide_do_reset(drive); | |
605 | } | |
baf08f0b BZ |
606 | } |
607 | ||
60c0cd02 BZ |
608 | hwif->expiry = expiry; |
609 | ||
594c16d8 | 610 | /* Set the interrupt routine */ |
d6251d44 BP |
611 | ide_set_handler(drive, |
612 | (dev_is_idecd(drive) ? drive->irq_handler | |
613 | : ide_pc_intr), | |
60c0cd02 | 614 | timeout); |
594c16d8 | 615 | |
2eba0827 BP |
616 | /* Send the actual packet */ |
617 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) | |
618 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); | |
619 | ||
594c16d8 | 620 | /* Begin DMA, if necessary */ |
b16aabc9 BP |
621 | if (dev_is_idecd(drive)) { |
622 | if (drive->dma) | |
623 | hwif->dma_ops->dma_start(drive); | |
624 | } else { | |
625 | if (pc->flags & PC_FLAG_DMA_OK) { | |
626 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
627 | hwif->dma_ops->dma_start(drive); | |
628 | } | |
594c16d8 BZ |
629 | } |
630 | ||
594c16d8 BZ |
631 | return ide_started; |
632 | } | |
6bf1641c | 633 | |
b788ee9c | 634 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd) |
6bf1641c | 635 | { |
d77612ab | 636 | struct ide_atapi_pc *pc; |
6bf1641c | 637 | ide_hwif_t *hwif = drive->hwif; |
22981694 | 638 | const struct ide_dma_ops *dma_ops = hwif->dma_ops; |
4cad085e | 639 | ide_expiry_t *expiry = NULL; |
e6830a86 | 640 | struct request *rq = hwif->rq; |
28ad91db | 641 | unsigned int timeout; |
f9476b96 | 642 | u32 tf_flags; |
392de1d5 | 643 | u16 bcount; |
35b5d0be | 644 | u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT); |
6bf1641c | 645 | |
ed48554f BP |
646 | if (dev_is_idecd(drive)) { |
647 | tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL; | |
e6830a86 | 648 | bcount = ide_cd_get_xferlen(rq); |
4cad085e | 649 | expiry = ide_cd_expiry; |
28ad91db | 650 | timeout = ATAPI_WAIT_PC; |
d77612ab | 651 | |
e6830a86 | 652 | if (drive->dma) { |
22981694 BZ |
653 | if (ide_build_sglist(drive, cmd)) |
654 | drive->dma = !dma_ops->dma_setup(drive, cmd); | |
e6830a86 BZ |
655 | else |
656 | drive->dma = 0; | |
657 | } | |
ed48554f | 658 | } else { |
d77612ab BP |
659 | pc = drive->pc; |
660 | ||
661 | /* We haven't transferred any data yet */ | |
662 | pc->xferred = 0; | |
663 | pc->cur_pos = pc->buf; | |
664 | ||
ed48554f BP |
665 | tf_flags = IDE_TFLAG_OUT_DEVICE; |
666 | bcount = ((drive->media == ide_tape) ? | |
667 | pc->req_xfer : | |
668 | min(pc->req_xfer, 63 * 1024)); | |
6bf1641c | 669 | |
d77612ab BP |
670 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
671 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
672 | ide_dma_off(drive); | |
673 | } | |
6bf1641c | 674 | |
d77612ab | 675 | if ((pc->flags & PC_FLAG_DMA_OK) && |
e6830a86 | 676 | (drive->dev_flags & IDE_DFLAG_USING_DMA)) { |
22981694 BZ |
677 | if (ide_build_sglist(drive, cmd)) |
678 | drive->dma = !dma_ops->dma_setup(drive, cmd); | |
e6830a86 BZ |
679 | else |
680 | drive->dma = 0; | |
681 | } | |
6bf1641c | 682 | |
d77612ab BP |
683 | if (!drive->dma) |
684 | pc->flags &= ~PC_FLAG_DMA_OK; | |
28ad91db BP |
685 | |
686 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
687 | : WAIT_TAPE_CMD; | |
d77612ab | 688 | } |
6bf1641c | 689 | |
b788ee9c BZ |
690 | ide_init_packet_cmd(cmd, tf_flags, bcount, drive->dma); |
691 | ||
692 | (void)do_rw_taskfile(drive, cmd); | |
6bf1641c | 693 | |
35b5d0be | 694 | if (drq_int) { |
5f25843f BP |
695 | if (drive->dma) |
696 | drive->waiting_for_dma = 0; | |
22117d6e | 697 | hwif->expiry = expiry; |
6bf1641c | 698 | } |
35b5d0be BZ |
699 | |
700 | ide_execute_command(drive, cmd, ide_transfer_pc, timeout); | |
701 | ||
702 | return drq_int ? ide_started : ide_transfer_pc(drive); | |
6bf1641c BZ |
703 | } |
704 | EXPORT_SYMBOL_GPL(ide_issue_pc); |