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Commit | Line | Data |
---|---|---|
594c16d8 BZ |
1 | /* |
2 | * ATAPI support. | |
3 | */ | |
4 | ||
5 | #include <linux/kernel.h> | |
6 | #include <linux/delay.h> | |
7 | #include <linux/ide.h> | |
646c0cb6 BZ |
8 | #include <scsi/scsi.h> |
9 | ||
10 | #ifdef DEBUG | |
11 | #define debug_log(fmt, args...) \ | |
12 | printk(KERN_INFO "ide: " fmt, ## args) | |
13 | #else | |
14 | #define debug_log(fmt, args...) do {} while (0) | |
15 | #endif | |
16 | ||
991cb26a BP |
17 | static inline int dev_is_idecd(ide_drive_t *drive) |
18 | { | |
19 | return (drive->media == ide_cdrom || drive->media == ide_optical) && | |
20 | !(drive->dev_flags & IDE_DFLAG_SCSI); | |
21 | } | |
22 | ||
51509eec BZ |
23 | /* |
24 | * Check whether we can support a device, | |
25 | * based on the ATAPI IDENTIFY command results. | |
26 | */ | |
27 | int ide_check_atapi_device(ide_drive_t *drive, const char *s) | |
28 | { | |
29 | u16 *id = drive->id; | |
30 | u8 gcw[2], protocol, device_type, removable, drq_type, packet_size; | |
31 | ||
32 | *((u16 *)&gcw) = id[ATA_ID_CONFIG]; | |
33 | ||
34 | protocol = (gcw[1] & 0xC0) >> 6; | |
35 | device_type = gcw[1] & 0x1F; | |
36 | removable = (gcw[0] & 0x80) >> 7; | |
37 | drq_type = (gcw[0] & 0x60) >> 5; | |
38 | packet_size = gcw[0] & 0x03; | |
39 | ||
40 | #ifdef CONFIG_PPC | |
41 | /* kludge for Apple PowerBook internal zip */ | |
42 | if (drive->media == ide_floppy && device_type == 5 && | |
43 | !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && | |
44 | strstr((char *)&id[ATA_ID_PROD], "ZIP")) | |
45 | device_type = 0; | |
46 | #endif | |
47 | ||
48 | if (protocol != 2) | |
49 | printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n", | |
50 | s, drive->name, protocol); | |
51 | else if ((drive->media == ide_floppy && device_type != 0) || | |
52 | (drive->media == ide_tape && device_type != 1)) | |
53 | printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n", | |
54 | s, drive->name, device_type); | |
55 | else if (removable == 0) | |
56 | printk(KERN_ERR "%s: %s: the removable flag is not set\n", | |
57 | s, drive->name); | |
58 | else if (drive->media == ide_floppy && drq_type == 3) | |
59 | printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not " | |
60 | "supported\n", s, drive->name, drq_type); | |
61 | else if (packet_size != 0) | |
62 | printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 " | |
63 | "bytes\n", s, drive->name, packet_size); | |
64 | else | |
65 | return 1; | |
66 | return 0; | |
67 | } | |
68 | EXPORT_SYMBOL_GPL(ide_check_atapi_device); | |
69 | ||
acaa0f5f BZ |
70 | /* PIO data transfer routine using the scatter gather table. */ |
71 | int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, | |
72 | unsigned int bcount, int write) | |
73 | { | |
74 | ide_hwif_t *hwif = drive->hwif; | |
75 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; | |
76 | xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data; | |
77 | struct scatterlist *sg = pc->sg; | |
78 | char *buf; | |
79 | int count, done = 0; | |
80 | ||
81 | while (bcount) { | |
82 | count = min(sg->length - pc->b_count, bcount); | |
83 | ||
84 | if (PageHighMem(sg_page(sg))) { | |
85 | unsigned long flags; | |
86 | ||
87 | local_irq_save(flags); | |
88 | buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset; | |
89 | xf(drive, NULL, buf + pc->b_count, count); | |
90 | kunmap_atomic(buf - sg->offset, KM_IRQ0); | |
91 | local_irq_restore(flags); | |
92 | } else { | |
93 | buf = sg_virt(sg); | |
94 | xf(drive, NULL, buf + pc->b_count, count); | |
95 | } | |
96 | ||
97 | bcount -= count; | |
98 | pc->b_count += count; | |
99 | done += count; | |
100 | ||
101 | if (pc->b_count == sg->length) { | |
102 | if (!--pc->sg_cnt) | |
103 | break; | |
104 | pc->sg = sg = sg_next(sg); | |
105 | pc->b_count = 0; | |
106 | } | |
107 | } | |
108 | ||
109 | if (bcount) { | |
110 | printk(KERN_ERR "%s: %d leftover bytes, %s\n", drive->name, | |
111 | bcount, write ? "padding with zeros" | |
112 | : "discarding data"); | |
113 | ide_pad_transfer(drive, write, bcount); | |
114 | } | |
115 | ||
116 | return done; | |
117 | } | |
118 | EXPORT_SYMBOL_GPL(ide_io_buffers); | |
119 | ||
7bf7420a BZ |
120 | void ide_init_pc(struct ide_atapi_pc *pc) |
121 | { | |
122 | memset(pc, 0, sizeof(*pc)); | |
123 | pc->buf = pc->pc_buf; | |
124 | pc->buf_size = IDE_PC_BUFFER_SIZE; | |
125 | } | |
126 | EXPORT_SYMBOL_GPL(ide_init_pc); | |
127 | ||
7645c151 BZ |
128 | /* |
129 | * Generate a new packet command request in front of the request queue, before | |
130 | * the current request, so that it will be processed immediately, on the next | |
131 | * pass through the driver. | |
132 | */ | |
6b0da28b BZ |
133 | static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk, |
134 | struct ide_atapi_pc *pc, struct request *rq) | |
7645c151 BZ |
135 | { |
136 | blk_rq_init(NULL, rq); | |
137 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
138 | rq->cmd_flags |= REQ_PREEMPT; | |
139 | rq->buffer = (char *)pc; | |
140 | rq->rq_disk = disk; | |
141 | memcpy(rq->cmd, pc->c, 12); | |
142 | if (drive->media == ide_tape) | |
143 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
144 | ide_do_drive_cmd(drive, rq); | |
145 | } | |
7645c151 | 146 | |
2ac07d92 BZ |
147 | /* |
148 | * Add a special packet command request to the tail of the request queue, | |
149 | * and wait for it to be serviced. | |
150 | */ | |
151 | int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, | |
152 | struct ide_atapi_pc *pc) | |
153 | { | |
154 | struct request *rq; | |
155 | int error; | |
156 | ||
157 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
158 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
159 | rq->buffer = (char *)pc; | |
160 | memcpy(rq->cmd, pc->c, 12); | |
161 | if (drive->media == ide_tape) | |
162 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
163 | error = blk_execute_rq(drive->queue, disk, rq, 0); | |
164 | blk_put_request(rq); | |
165 | ||
166 | return error; | |
167 | } | |
168 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
169 | ||
de699ad5 BZ |
170 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
171 | { | |
172 | struct ide_atapi_pc pc; | |
173 | ||
174 | ide_init_pc(&pc); | |
175 | pc.c[0] = TEST_UNIT_READY; | |
176 | ||
177 | return ide_queue_pc_tail(drive, disk, &pc); | |
178 | } | |
179 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
180 | ||
0c8a6c7a BZ |
181 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
182 | { | |
183 | struct ide_atapi_pc pc; | |
184 | ||
185 | ide_init_pc(&pc); | |
186 | pc.c[0] = START_STOP; | |
187 | pc.c[4] = start; | |
188 | ||
189 | if (drive->media == ide_tape) | |
190 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
191 | ||
192 | return ide_queue_pc_tail(drive, disk, &pc); | |
193 | } | |
194 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
195 | ||
0578042d BZ |
196 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
197 | { | |
198 | struct ide_atapi_pc pc; | |
199 | ||
42619d35 | 200 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
0578042d BZ |
201 | return 0; |
202 | ||
203 | ide_init_pc(&pc); | |
204 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
205 | pc.c[4] = on; | |
206 | ||
207 | return ide_queue_pc_tail(drive, disk, &pc); | |
208 | } | |
209 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
210 | ||
6b0da28b BZ |
211 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
212 | { | |
213 | ide_init_pc(pc); | |
214 | pc->c[0] = REQUEST_SENSE; | |
215 | if (drive->media == ide_floppy) { | |
216 | pc->c[4] = 255; | |
217 | pc->req_xfer = 18; | |
218 | } else { | |
219 | pc->c[4] = 20; | |
220 | pc->req_xfer = 20; | |
221 | } | |
222 | } | |
223 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
224 | ||
225 | /* | |
226 | * Called when an error was detected during the last packet command. | |
227 | * We queue a request sense packet command in the head of the request list. | |
228 | */ | |
229 | void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk) | |
230 | { | |
231 | struct request *rq = &drive->request_sense_rq; | |
232 | struct ide_atapi_pc *pc = &drive->request_sense_pc; | |
233 | ||
234 | (void)ide_read_error(drive); | |
235 | ide_create_request_sense_cmd(drive, pc); | |
236 | if (drive->media == ide_tape) | |
237 | set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags); | |
238 | ide_queue_pc_head(drive, disk, pc, rq); | |
239 | } | |
240 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
241 | ||
844b9468 BZ |
242 | int ide_scsi_expiry(ide_drive_t *drive) |
243 | { | |
244 | struct ide_atapi_pc *pc = drive->pc; | |
245 | ||
246 | debug_log("%s called for %lu at %lu\n", __func__, | |
247 | pc->scsi_cmd->serial_number, jiffies); | |
248 | ||
249 | pc->flags |= PC_FLAG_TIMEDOUT; | |
250 | ||
251 | return 0; /* we do not want the IDE subsystem to retry */ | |
252 | } | |
253 | EXPORT_SYMBOL_GPL(ide_scsi_expiry); | |
254 | ||
392de1d5 BP |
255 | int ide_cd_get_xferlen(struct request *rq) |
256 | { | |
257 | if (blk_fs_request(rq)) | |
258 | return 32768; | |
259 | else if (blk_sense_request(rq) || blk_pc_request(rq) || | |
260 | rq->cmd_type == REQ_TYPE_ATA_PC) | |
261 | return rq->data_len; | |
262 | else | |
263 | return 0; | |
264 | } | |
265 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); | |
266 | ||
aa5d2de7 BZ |
267 | /* |
268 | * This is the usual interrupt handler which will be called during a packet | |
269 | * command. We will transfer some of the data (as requested by the drive) | |
270 | * and will re-point interrupt handler to us. | |
271 | */ | |
272 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 273 | { |
2b9efba4 | 274 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 275 | ide_hwif_t *hwif = drive->hwif; |
8fccf899 | 276 | struct request *rq = hwif->hwgroup->rq; |
374e042c | 277 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
646c0cb6 | 278 | xfer_func_t *xferfunc; |
844b9468 BZ |
279 | ide_expiry_t *expiry; |
280 | unsigned int timeout, temp; | |
646c0cb6 | 281 | u16 bcount; |
97100fc8 | 282 | u8 stat, ireason, scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI), dsc = 0; |
646c0cb6 BZ |
283 | |
284 | debug_log("Enter %s - interrupt handler\n", __func__); | |
285 | ||
844b9468 BZ |
286 | if (scsi) { |
287 | timeout = ide_scsi_get_timeout(pc); | |
288 | expiry = ide_scsi_expiry; | |
289 | } else { | |
290 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
291 | : WAIT_TAPE_CMD; | |
292 | expiry = NULL; | |
293 | } | |
294 | ||
646c0cb6 | 295 | if (pc->flags & PC_FLAG_TIMEDOUT) { |
b14c7212 | 296 | drive->pc_callback(drive, 0); |
646c0cb6 BZ |
297 | return ide_stopped; |
298 | } | |
299 | ||
300 | /* Clear the interrupt */ | |
374e042c | 301 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
302 | |
303 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
304 | if (hwif->dma_ops->dma_end(drive) || | |
3a7d2484 | 305 | (drive->media == ide_tape && !scsi && (stat & ATA_ERR))) { |
646c0cb6 BZ |
306 | if (drive->media == ide_floppy && !scsi) |
307 | printk(KERN_ERR "%s: DMA %s error\n", | |
308 | drive->name, rq_data_dir(pc->rq) | |
309 | ? "write" : "read"); | |
310 | pc->flags |= PC_FLAG_DMA_ERROR; | |
311 | } else { | |
312 | pc->xferred = pc->req_xfer; | |
85e39035 BZ |
313 | if (drive->pc_update_buffers) |
314 | drive->pc_update_buffers(drive, pc); | |
646c0cb6 BZ |
315 | } |
316 | debug_log("%s: DMA finished\n", drive->name); | |
317 | } | |
318 | ||
319 | /* No more interrupts */ | |
3a7d2484 | 320 | if ((stat & ATA_DRQ) == 0) { |
646c0cb6 BZ |
321 | debug_log("Packet command completed, %d bytes transferred\n", |
322 | pc->xferred); | |
323 | ||
324 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
325 | ||
326 | local_irq_enable_in_hardirq(); | |
327 | ||
328 | if (drive->media == ide_tape && !scsi && | |
3a7d2484 BZ |
329 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
330 | stat &= ~ATA_ERR; | |
8fccf899 | 331 | |
3a7d2484 | 332 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
333 | /* Error detected */ |
334 | debug_log("%s: I/O error\n", drive->name); | |
335 | ||
336 | if (drive->media != ide_tape || scsi) { | |
337 | pc->rq->errors++; | |
338 | if (scsi) | |
339 | goto cmd_finished; | |
340 | } | |
341 | ||
8fccf899 | 342 | if (rq->cmd[0] == REQUEST_SENSE) { |
646c0cb6 BZ |
343 | printk(KERN_ERR "%s: I/O error in request sense" |
344 | " command\n", drive->name); | |
345 | return ide_do_reset(drive); | |
346 | } | |
347 | ||
8fccf899 | 348 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
349 | |
350 | /* Retry operation */ | |
6b0da28b | 351 | ide_retry_pc(drive, rq->rq_disk); |
8fccf899 | 352 | |
646c0cb6 BZ |
353 | /* queued, but not started */ |
354 | return ide_stopped; | |
355 | } | |
356 | cmd_finished: | |
357 | pc->error = 0; | |
b14c7212 BZ |
358 | |
359 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
360 | dsc = 1; | |
8fccf899 | 361 | |
646c0cb6 | 362 | /* Command finished - Call the callback function */ |
b14c7212 | 363 | drive->pc_callback(drive, dsc); |
8fccf899 | 364 | |
646c0cb6 BZ |
365 | return ide_stopped; |
366 | } | |
367 | ||
368 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
369 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
370 | printk(KERN_ERR "%s: The device wants to issue more interrupts " | |
371 | "in DMA mode\n", drive->name); | |
372 | ide_dma_off(drive); | |
373 | return ide_do_reset(drive); | |
374 | } | |
646c0cb6 | 375 | |
1823649b BZ |
376 | /* Get the number of bytes to transfer on this interrupt. */ |
377 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 378 | |
3a7d2484 | 379 | if (ireason & ATAPI_COD) { |
646c0cb6 BZ |
380 | printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
381 | return ide_do_reset(drive); | |
382 | } | |
8fccf899 | 383 | |
3a7d2484 BZ |
384 | if (((ireason & ATAPI_IO) == ATAPI_IO) == |
385 | !!(pc->flags & PC_FLAG_WRITING)) { | |
646c0cb6 BZ |
386 | /* Hopefully, we will never get here */ |
387 | printk(KERN_ERR "%s: We wanted to %s, but the device wants us " | |
388 | "to %s!\n", drive->name, | |
3a7d2484 BZ |
389 | (ireason & ATAPI_IO) ? "Write" : "Read", |
390 | (ireason & ATAPI_IO) ? "Read" : "Write"); | |
646c0cb6 BZ |
391 | return ide_do_reset(drive); |
392 | } | |
8fccf899 | 393 | |
646c0cb6 BZ |
394 | if (!(pc->flags & PC_FLAG_WRITING)) { |
395 | /* Reading - Check that we have enough space */ | |
396 | temp = pc->xferred + bcount; | |
397 | if (temp > pc->req_xfer) { | |
398 | if (temp > pc->buf_size) { | |
399 | printk(KERN_ERR "%s: The device wants to send " | |
400 | "us more data than expected - " | |
401 | "discarding data\n", | |
402 | drive->name); | |
403 | if (scsi) | |
404 | temp = pc->buf_size - pc->xferred; | |
405 | else | |
406 | temp = 0; | |
407 | if (temp) { | |
408 | if (pc->sg) | |
85e39035 BZ |
409 | drive->pc_io_buffers(drive, pc, |
410 | temp, 0); | |
646c0cb6 | 411 | else |
374e042c | 412 | tp_ops->input_data(drive, NULL, |
646c0cb6 BZ |
413 | pc->cur_pos, temp); |
414 | printk(KERN_ERR "%s: transferred %d of " | |
415 | "%d bytes\n", | |
416 | drive->name, | |
417 | temp, bcount); | |
418 | } | |
419 | pc->xferred += temp; | |
420 | pc->cur_pos += temp; | |
421 | ide_pad_transfer(drive, 0, bcount - temp); | |
844b9468 | 422 | goto next_irq; |
646c0cb6 BZ |
423 | } |
424 | debug_log("The device wants to send us more data than " | |
425 | "expected - allowing transfer\n"); | |
426 | } | |
374e042c | 427 | xferfunc = tp_ops->input_data; |
646c0cb6 | 428 | } else |
374e042c | 429 | xferfunc = tp_ops->output_data; |
646c0cb6 BZ |
430 | |
431 | if ((drive->media == ide_floppy && !scsi && !pc->buf) || | |
432 | (drive->media == ide_tape && !scsi && pc->bh) || | |
acaa0f5f | 433 | (scsi && pc->sg)) { |
85e39035 | 434 | int done = drive->pc_io_buffers(drive, pc, bcount, |
acaa0f5f BZ |
435 | !!(pc->flags & PC_FLAG_WRITING)); |
436 | ||
437 | /* FIXME: don't do partial completions */ | |
438 | if (drive->media == ide_floppy && !scsi) | |
439 | ide_end_request(drive, 1, done >> 9); | |
440 | } else | |
646c0cb6 BZ |
441 | xferfunc(drive, NULL, pc->cur_pos, bcount); |
442 | ||
443 | /* Update the current position */ | |
444 | pc->xferred += bcount; | |
445 | pc->cur_pos += bcount; | |
446 | ||
447 | debug_log("[cmd %x] transferred %d bytes on that intr.\n", | |
8fccf899 | 448 | rq->cmd[0], bcount); |
844b9468 | 449 | next_irq: |
646c0cb6 | 450 | /* And set the interrupt handler again */ |
aa5d2de7 | 451 | ide_set_handler(drive, ide_pc_intr, timeout, expiry); |
646c0cb6 BZ |
452 | return ide_started; |
453 | } | |
594c16d8 | 454 | |
88a72109 BZ |
455 | static u8 ide_read_ireason(ide_drive_t *drive) |
456 | { | |
457 | ide_task_t task; | |
458 | ||
459 | memset(&task, 0, sizeof(task)); | |
460 | task.tf_flags = IDE_TFLAG_IN_NSECT; | |
461 | ||
374e042c | 462 | drive->hwif->tp_ops->tf_read(drive, &task); |
88a72109 BZ |
463 | |
464 | return task.tf.nsect & 3; | |
465 | } | |
466 | ||
594c16d8 BZ |
467 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
468 | { | |
594c16d8 BZ |
469 | int retries = 100; |
470 | ||
3a7d2484 BZ |
471 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
472 | (ireason & ATAPI_IO))) { | |
594c16d8 BZ |
473 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " |
474 | "a packet command, retrying\n", drive->name); | |
475 | udelay(100); | |
88a72109 | 476 | ireason = ide_read_ireason(drive); |
594c16d8 BZ |
477 | if (retries == 0) { |
478 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " | |
479 | "a packet command, ignoring\n", | |
480 | drive->name); | |
3a7d2484 BZ |
481 | ireason |= ATAPI_COD; |
482 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
483 | } |
484 | } | |
485 | ||
486 | return ireason; | |
487 | } | |
488 | ||
baf08f0b BZ |
489 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
490 | { | |
491 | /* Send the actual packet */ | |
492 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); | |
493 | ||
494 | /* Timeout for the packet command */ | |
495 | return WAIT_FLOPPY_CMD; | |
496 | } | |
497 | ||
498 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) | |
594c16d8 | 499 | { |
2b9efba4 | 500 | struct ide_atapi_pc *pc = drive->pc; |
594c16d8 | 501 | ide_hwif_t *hwif = drive->hwif; |
8fccf899 | 502 | struct request *rq = hwif->hwgroup->rq; |
baf08f0b BZ |
503 | ide_expiry_t *expiry; |
504 | unsigned int timeout; | |
594c16d8 BZ |
505 | ide_startstop_t startstop; |
506 | u8 ireason; | |
507 | ||
3a7d2484 | 508 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
594c16d8 BZ |
509 | printk(KERN_ERR "%s: Strange, packet command initiated yet " |
510 | "DRQ isn't asserted\n", drive->name); | |
511 | return startstop; | |
512 | } | |
513 | ||
88a72109 | 514 | ireason = ide_read_ireason(drive); |
97100fc8 BZ |
515 | if (drive->media == ide_tape && |
516 | (drive->dev_flags & IDE_DFLAG_SCSI) == 0) | |
594c16d8 BZ |
517 | ireason = ide_wait_ireason(drive, ireason); |
518 | ||
3a7d2484 | 519 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { |
594c16d8 BZ |
520 | printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing " |
521 | "a packet command\n", drive->name); | |
522 | return ide_do_reset(drive); | |
523 | } | |
524 | ||
baf08f0b BZ |
525 | /* |
526 | * If necessary schedule the packet transfer to occur 'timeout' | |
527 | * miliseconds later in ide_delayed_transfer_pc() after the device | |
528 | * says it's ready for a packet. | |
529 | */ | |
530 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { | |
531 | timeout = drive->pc_delay; | |
532 | expiry = &ide_delayed_transfer_pc; | |
533 | } else { | |
97100fc8 | 534 | if (drive->dev_flags & IDE_DFLAG_SCSI) { |
baf08f0b BZ |
535 | timeout = ide_scsi_get_timeout(pc); |
536 | expiry = ide_scsi_expiry; | |
537 | } else { | |
538 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
539 | : WAIT_TAPE_CMD; | |
540 | expiry = NULL; | |
541 | } | |
542 | } | |
543 | ||
594c16d8 | 544 | /* Set the interrupt routine */ |
aa5d2de7 | 545 | ide_set_handler(drive, ide_pc_intr, timeout, expiry); |
594c16d8 BZ |
546 | |
547 | /* Begin DMA, if necessary */ | |
548 | if (pc->flags & PC_FLAG_DMA_OK) { | |
549 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
550 | hwif->dma_ops->dma_start(drive); | |
551 | } | |
552 | ||
553 | /* Send the actual packet */ | |
ea68d270 | 554 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) |
8fccf899 | 555 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12); |
594c16d8 BZ |
556 | |
557 | return ide_started; | |
558 | } | |
6bf1641c | 559 | |
baf08f0b | 560 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout, |
6bf1641c BZ |
561 | ide_expiry_t *expiry) |
562 | { | |
2b9efba4 | 563 | struct ide_atapi_pc *pc = drive->pc; |
6bf1641c | 564 | ide_hwif_t *hwif = drive->hwif; |
f9476b96 | 565 | u32 tf_flags; |
392de1d5 | 566 | u16 bcount; |
0a9b6f88 | 567 | u8 scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI); |
6bf1641c BZ |
568 | |
569 | /* We haven't transferred any data yet */ | |
570 | pc->xferred = 0; | |
571 | pc->cur_pos = pc->buf; | |
572 | ||
ed48554f BP |
573 | if (dev_is_idecd(drive)) { |
574 | tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL; | |
392de1d5 | 575 | bcount = ide_cd_get_xferlen(hwif->hwgroup->rq); |
ed48554f BP |
576 | } else if (scsi) { |
577 | tf_flags = 0; | |
6bf1641c | 578 | bcount = min(pc->req_xfer, 63 * 1024); |
ed48554f BP |
579 | } else { |
580 | tf_flags = IDE_TFLAG_OUT_DEVICE; | |
581 | bcount = ((drive->media == ide_tape) ? | |
582 | pc->req_xfer : | |
583 | min(pc->req_xfer, 63 * 1024)); | |
584 | } | |
6bf1641c BZ |
585 | |
586 | if (pc->flags & PC_FLAG_DMA_ERROR) { | |
587 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
588 | ide_dma_off(drive); | |
589 | } | |
590 | ||
4f02ff06 BP |
591 | if (((pc->flags & PC_FLAG_DMA_OK) && |
592 | (drive->dev_flags & IDE_DFLAG_USING_DMA)) || | |
593 | drive->dma) { | |
97100fc8 | 594 | if (scsi) |
6bf1641c | 595 | hwif->sg_mapped = 1; |
0a9b6f88 | 596 | drive->dma = !hwif->dma_ops->dma_setup(drive); |
97100fc8 | 597 | if (scsi) |
6bf1641c BZ |
598 | hwif->sg_mapped = 0; |
599 | } | |
600 | ||
0a9b6f88 | 601 | if (!drive->dma) |
6bf1641c BZ |
602 | pc->flags &= ~PC_FLAG_DMA_OK; |
603 | ||
f9476b96 | 604 | ide_pktcmd_tf_load(drive, tf_flags, bcount, drive->dma); |
6bf1641c BZ |
605 | |
606 | /* Issue the packet command */ | |
ac77ef8b | 607 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
baf08f0b | 608 | ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc, |
6bf1641c BZ |
609 | timeout, NULL); |
610 | return ide_started; | |
611 | } else { | |
612 | ide_execute_pkt_cmd(drive); | |
baf08f0b | 613 | return ide_transfer_pc(drive); |
6bf1641c BZ |
614 | } |
615 | } | |
616 | EXPORT_SYMBOL_GPL(ide_issue_pc); |