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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 | ||
51509eec BZ |
17 | /* |
18 | * Check whether we can support a device, | |
19 | * based on the ATAPI IDENTIFY command results. | |
20 | */ | |
21 | int ide_check_atapi_device(ide_drive_t *drive, const char *s) | |
22 | { | |
23 | u16 *id = drive->id; | |
24 | u8 gcw[2], protocol, device_type, removable, drq_type, packet_size; | |
25 | ||
26 | *((u16 *)&gcw) = id[ATA_ID_CONFIG]; | |
27 | ||
28 | protocol = (gcw[1] & 0xC0) >> 6; | |
29 | device_type = gcw[1] & 0x1F; | |
30 | removable = (gcw[0] & 0x80) >> 7; | |
31 | drq_type = (gcw[0] & 0x60) >> 5; | |
32 | packet_size = gcw[0] & 0x03; | |
33 | ||
34 | #ifdef CONFIG_PPC | |
35 | /* kludge for Apple PowerBook internal zip */ | |
36 | if (drive->media == ide_floppy && device_type == 5 && | |
37 | !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && | |
38 | strstr((char *)&id[ATA_ID_PROD], "ZIP")) | |
39 | device_type = 0; | |
40 | #endif | |
41 | ||
42 | if (protocol != 2) | |
43 | printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n", | |
44 | s, drive->name, protocol); | |
45 | else if ((drive->media == ide_floppy && device_type != 0) || | |
46 | (drive->media == ide_tape && device_type != 1)) | |
47 | printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n", | |
48 | s, drive->name, device_type); | |
49 | else if (removable == 0) | |
50 | printk(KERN_ERR "%s: %s: the removable flag is not set\n", | |
51 | s, drive->name); | |
52 | else if (drive->media == ide_floppy && drq_type == 3) | |
53 | printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not " | |
54 | "supported\n", s, drive->name, drq_type); | |
55 | else if (packet_size != 0) | |
56 | printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 " | |
57 | "bytes\n", s, drive->name, packet_size); | |
58 | else | |
59 | return 1; | |
60 | return 0; | |
61 | } | |
62 | EXPORT_SYMBOL_GPL(ide_check_atapi_device); | |
63 | ||
acaa0f5f BZ |
64 | /* PIO data transfer routine using the scatter gather table. */ |
65 | int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, | |
66 | unsigned int bcount, int write) | |
67 | { | |
68 | ide_hwif_t *hwif = drive->hwif; | |
69 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; | |
70 | xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data; | |
71 | struct scatterlist *sg = pc->sg; | |
72 | char *buf; | |
73 | int count, done = 0; | |
74 | ||
75 | while (bcount) { | |
76 | count = min(sg->length - pc->b_count, bcount); | |
77 | ||
78 | if (PageHighMem(sg_page(sg))) { | |
79 | unsigned long flags; | |
80 | ||
81 | local_irq_save(flags); | |
82 | buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset; | |
83 | xf(drive, NULL, buf + pc->b_count, count); | |
84 | kunmap_atomic(buf - sg->offset, KM_IRQ0); | |
85 | local_irq_restore(flags); | |
86 | } else { | |
87 | buf = sg_virt(sg); | |
88 | xf(drive, NULL, buf + pc->b_count, count); | |
89 | } | |
90 | ||
91 | bcount -= count; | |
92 | pc->b_count += count; | |
93 | done += count; | |
94 | ||
95 | if (pc->b_count == sg->length) { | |
96 | if (!--pc->sg_cnt) | |
97 | break; | |
98 | pc->sg = sg = sg_next(sg); | |
99 | pc->b_count = 0; | |
100 | } | |
101 | } | |
102 | ||
103 | if (bcount) { | |
104 | printk(KERN_ERR "%s: %d leftover bytes, %s\n", drive->name, | |
105 | bcount, write ? "padding with zeros" | |
106 | : "discarding data"); | |
107 | ide_pad_transfer(drive, write, bcount); | |
108 | } | |
109 | ||
110 | return done; | |
111 | } | |
112 | EXPORT_SYMBOL_GPL(ide_io_buffers); | |
113 | ||
646c0cb6 BZ |
114 | /* TODO: unify the code thus making some arguments go away */ |
115 | ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc, | |
116 | ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry, | |
117 | void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *), | |
118 | void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *), | |
acaa0f5f | 119 | int (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned, int)) |
646c0cb6 BZ |
120 | { |
121 | ide_hwif_t *hwif = drive->hwif; | |
8fccf899 | 122 | struct request *rq = hwif->hwgroup->rq; |
374e042c | 123 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
646c0cb6 BZ |
124 | xfer_func_t *xferfunc; |
125 | unsigned int temp; | |
126 | u16 bcount; | |
127 | u8 stat, ireason, scsi = drive->scsi; | |
128 | ||
129 | debug_log("Enter %s - interrupt handler\n", __func__); | |
130 | ||
131 | if (pc->flags & PC_FLAG_TIMEDOUT) { | |
db9d2869 | 132 | drive->pc_callback(drive); |
646c0cb6 BZ |
133 | return ide_stopped; |
134 | } | |
135 | ||
136 | /* Clear the interrupt */ | |
374e042c | 137 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
138 | |
139 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
140 | if (hwif->dma_ops->dma_end(drive) || | |
3a7d2484 | 141 | (drive->media == ide_tape && !scsi && (stat & ATA_ERR))) { |
646c0cb6 BZ |
142 | if (drive->media == ide_floppy && !scsi) |
143 | printk(KERN_ERR "%s: DMA %s error\n", | |
144 | drive->name, rq_data_dir(pc->rq) | |
145 | ? "write" : "read"); | |
146 | pc->flags |= PC_FLAG_DMA_ERROR; | |
147 | } else { | |
148 | pc->xferred = pc->req_xfer; | |
149 | if (update_buffers) | |
150 | update_buffers(drive, pc); | |
151 | } | |
152 | debug_log("%s: DMA finished\n", drive->name); | |
153 | } | |
154 | ||
155 | /* No more interrupts */ | |
3a7d2484 | 156 | if ((stat & ATA_DRQ) == 0) { |
646c0cb6 BZ |
157 | debug_log("Packet command completed, %d bytes transferred\n", |
158 | pc->xferred); | |
159 | ||
160 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
161 | ||
162 | local_irq_enable_in_hardirq(); | |
163 | ||
164 | if (drive->media == ide_tape && !scsi && | |
3a7d2484 BZ |
165 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
166 | stat &= ~ATA_ERR; | |
8fccf899 | 167 | |
3a7d2484 | 168 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
169 | /* Error detected */ |
170 | debug_log("%s: I/O error\n", drive->name); | |
171 | ||
172 | if (drive->media != ide_tape || scsi) { | |
173 | pc->rq->errors++; | |
174 | if (scsi) | |
175 | goto cmd_finished; | |
176 | } | |
177 | ||
8fccf899 | 178 | if (rq->cmd[0] == REQUEST_SENSE) { |
646c0cb6 BZ |
179 | printk(KERN_ERR "%s: I/O error in request sense" |
180 | " command\n", drive->name); | |
181 | return ide_do_reset(drive); | |
182 | } | |
183 | ||
8fccf899 | 184 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
185 | |
186 | /* Retry operation */ | |
187 | retry_pc(drive); | |
8fccf899 | 188 | |
646c0cb6 BZ |
189 | /* queued, but not started */ |
190 | return ide_stopped; | |
191 | } | |
192 | cmd_finished: | |
193 | pc->error = 0; | |
194 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && | |
3a7d2484 | 195 | (stat & ATA_DSC) == 0) { |
646c0cb6 BZ |
196 | dsc_handle(drive); |
197 | return ide_stopped; | |
198 | } | |
8fccf899 | 199 | |
646c0cb6 | 200 | /* Command finished - Call the callback function */ |
db9d2869 | 201 | drive->pc_callback(drive); |
8fccf899 | 202 | |
646c0cb6 BZ |
203 | return ide_stopped; |
204 | } | |
205 | ||
206 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
207 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
208 | printk(KERN_ERR "%s: The device wants to issue more interrupts " | |
209 | "in DMA mode\n", drive->name); | |
210 | ide_dma_off(drive); | |
211 | return ide_do_reset(drive); | |
212 | } | |
646c0cb6 | 213 | |
1823649b BZ |
214 | /* Get the number of bytes to transfer on this interrupt. */ |
215 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 216 | |
3a7d2484 | 217 | if (ireason & ATAPI_COD) { |
646c0cb6 BZ |
218 | printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
219 | return ide_do_reset(drive); | |
220 | } | |
8fccf899 | 221 | |
3a7d2484 BZ |
222 | if (((ireason & ATAPI_IO) == ATAPI_IO) == |
223 | !!(pc->flags & PC_FLAG_WRITING)) { | |
646c0cb6 BZ |
224 | /* Hopefully, we will never get here */ |
225 | printk(KERN_ERR "%s: We wanted to %s, but the device wants us " | |
226 | "to %s!\n", drive->name, | |
3a7d2484 BZ |
227 | (ireason & ATAPI_IO) ? "Write" : "Read", |
228 | (ireason & ATAPI_IO) ? "Read" : "Write"); | |
646c0cb6 BZ |
229 | return ide_do_reset(drive); |
230 | } | |
8fccf899 | 231 | |
646c0cb6 BZ |
232 | if (!(pc->flags & PC_FLAG_WRITING)) { |
233 | /* Reading - Check that we have enough space */ | |
234 | temp = pc->xferred + bcount; | |
235 | if (temp > pc->req_xfer) { | |
236 | if (temp > pc->buf_size) { | |
237 | printk(KERN_ERR "%s: The device wants to send " | |
238 | "us more data than expected - " | |
239 | "discarding data\n", | |
240 | drive->name); | |
241 | if (scsi) | |
242 | temp = pc->buf_size - pc->xferred; | |
243 | else | |
244 | temp = 0; | |
245 | if (temp) { | |
246 | if (pc->sg) | |
247 | io_buffers(drive, pc, temp, 0); | |
248 | else | |
374e042c | 249 | tp_ops->input_data(drive, NULL, |
646c0cb6 BZ |
250 | pc->cur_pos, temp); |
251 | printk(KERN_ERR "%s: transferred %d of " | |
252 | "%d bytes\n", | |
253 | drive->name, | |
254 | temp, bcount); | |
255 | } | |
256 | pc->xferred += temp; | |
257 | pc->cur_pos += temp; | |
258 | ide_pad_transfer(drive, 0, bcount - temp); | |
259 | ide_set_handler(drive, handler, timeout, | |
260 | expiry); | |
261 | return ide_started; | |
262 | } | |
263 | debug_log("The device wants to send us more data than " | |
264 | "expected - allowing transfer\n"); | |
265 | } | |
374e042c | 266 | xferfunc = tp_ops->input_data; |
646c0cb6 | 267 | } else |
374e042c | 268 | xferfunc = tp_ops->output_data; |
646c0cb6 BZ |
269 | |
270 | if ((drive->media == ide_floppy && !scsi && !pc->buf) || | |
271 | (drive->media == ide_tape && !scsi && pc->bh) || | |
acaa0f5f BZ |
272 | (scsi && pc->sg)) { |
273 | int done = io_buffers(drive, pc, bcount, | |
274 | !!(pc->flags & PC_FLAG_WRITING)); | |
275 | ||
276 | /* FIXME: don't do partial completions */ | |
277 | if (drive->media == ide_floppy && !scsi) | |
278 | ide_end_request(drive, 1, done >> 9); | |
279 | } else | |
646c0cb6 BZ |
280 | xferfunc(drive, NULL, pc->cur_pos, bcount); |
281 | ||
282 | /* Update the current position */ | |
283 | pc->xferred += bcount; | |
284 | pc->cur_pos += bcount; | |
285 | ||
286 | debug_log("[cmd %x] transferred %d bytes on that intr.\n", | |
8fccf899 | 287 | rq->cmd[0], bcount); |
646c0cb6 BZ |
288 | |
289 | /* And set the interrupt handler again */ | |
290 | ide_set_handler(drive, handler, timeout, expiry); | |
291 | return ide_started; | |
292 | } | |
293 | EXPORT_SYMBOL_GPL(ide_pc_intr); | |
594c16d8 | 294 | |
88a72109 BZ |
295 | static u8 ide_read_ireason(ide_drive_t *drive) |
296 | { | |
297 | ide_task_t task; | |
298 | ||
299 | memset(&task, 0, sizeof(task)); | |
300 | task.tf_flags = IDE_TFLAG_IN_NSECT; | |
301 | ||
374e042c | 302 | drive->hwif->tp_ops->tf_read(drive, &task); |
88a72109 BZ |
303 | |
304 | return task.tf.nsect & 3; | |
305 | } | |
306 | ||
594c16d8 BZ |
307 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
308 | { | |
594c16d8 BZ |
309 | int retries = 100; |
310 | ||
3a7d2484 BZ |
311 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
312 | (ireason & ATAPI_IO))) { | |
594c16d8 BZ |
313 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " |
314 | "a packet command, retrying\n", drive->name); | |
315 | udelay(100); | |
88a72109 | 316 | ireason = ide_read_ireason(drive); |
594c16d8 BZ |
317 | if (retries == 0) { |
318 | printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing " | |
319 | "a packet command, ignoring\n", | |
320 | drive->name); | |
3a7d2484 BZ |
321 | ireason |= ATAPI_COD; |
322 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
323 | } |
324 | } | |
325 | ||
326 | return ireason; | |
327 | } | |
328 | ||
329 | ide_startstop_t ide_transfer_pc(ide_drive_t *drive, struct ide_atapi_pc *pc, | |
330 | ide_handler_t *handler, unsigned int timeout, | |
331 | ide_expiry_t *expiry) | |
332 | { | |
333 | ide_hwif_t *hwif = drive->hwif; | |
8fccf899 | 334 | struct request *rq = hwif->hwgroup->rq; |
594c16d8 BZ |
335 | ide_startstop_t startstop; |
336 | u8 ireason; | |
337 | ||
3a7d2484 | 338 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
594c16d8 BZ |
339 | printk(KERN_ERR "%s: Strange, packet command initiated yet " |
340 | "DRQ isn't asserted\n", drive->name); | |
341 | return startstop; | |
342 | } | |
343 | ||
88a72109 | 344 | ireason = ide_read_ireason(drive); |
594c16d8 BZ |
345 | if (drive->media == ide_tape && !drive->scsi) |
346 | ireason = ide_wait_ireason(drive, ireason); | |
347 | ||
3a7d2484 | 348 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { |
594c16d8 BZ |
349 | printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing " |
350 | "a packet command\n", drive->name); | |
351 | return ide_do_reset(drive); | |
352 | } | |
353 | ||
354 | /* Set the interrupt routine */ | |
355 | ide_set_handler(drive, handler, timeout, expiry); | |
356 | ||
357 | /* Begin DMA, if necessary */ | |
358 | if (pc->flags & PC_FLAG_DMA_OK) { | |
359 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
360 | hwif->dma_ops->dma_start(drive); | |
361 | } | |
362 | ||
363 | /* Send the actual packet */ | |
ea68d270 | 364 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) |
8fccf899 | 365 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12); |
594c16d8 BZ |
366 | |
367 | return ide_started; | |
368 | } | |
369 | EXPORT_SYMBOL_GPL(ide_transfer_pc); | |
6bf1641c BZ |
370 | |
371 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_atapi_pc *pc, | |
372 | ide_handler_t *handler, unsigned int timeout, | |
373 | ide_expiry_t *expiry) | |
374 | { | |
375 | ide_hwif_t *hwif = drive->hwif; | |
376 | u16 bcount; | |
377 | u8 dma = 0; | |
378 | ||
379 | /* We haven't transferred any data yet */ | |
380 | pc->xferred = 0; | |
381 | pc->cur_pos = pc->buf; | |
382 | ||
383 | /* Request to transfer the entire buffer at once */ | |
384 | if (drive->media == ide_tape && !drive->scsi) | |
385 | bcount = pc->req_xfer; | |
386 | else | |
387 | bcount = min(pc->req_xfer, 63 * 1024); | |
388 | ||
389 | if (pc->flags & PC_FLAG_DMA_ERROR) { | |
390 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
391 | ide_dma_off(drive); | |
392 | } | |
393 | ||
394 | if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) { | |
395 | if (drive->scsi) | |
396 | hwif->sg_mapped = 1; | |
397 | dma = !hwif->dma_ops->dma_setup(drive); | |
398 | if (drive->scsi) | |
399 | hwif->sg_mapped = 0; | |
400 | } | |
401 | ||
402 | if (!dma) | |
403 | pc->flags &= ~PC_FLAG_DMA_OK; | |
404 | ||
405 | ide_pktcmd_tf_load(drive, drive->scsi ? 0 : IDE_TFLAG_OUT_DEVICE, | |
406 | bcount, dma); | |
407 | ||
408 | /* Issue the packet command */ | |
ac77ef8b | 409 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
aaaade3f | 410 | ide_execute_command(drive, ATA_CMD_PACKET, handler, |
6bf1641c BZ |
411 | timeout, NULL); |
412 | return ide_started; | |
413 | } else { | |
414 | ide_execute_pkt_cmd(drive); | |
415 | return (*handler)(drive); | |
416 | } | |
417 | } | |
418 | EXPORT_SYMBOL_GPL(ide_issue_pc); |