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74ee1a75 AM |
1 | /* GD ROM driver for the SEGA Dreamcast |
2 | * copyright Adrian McMenamin, 2007 | |
3 | * With thanks to Marcus Comstedt and Nathan Keynes | |
4 | * for work in reversing PIO and DMA | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | * | |
20 | */ | |
21 | ||
e597cd09 JP |
22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
23 | ||
74ee1a75 AM |
24 | #include <linux/init.h> |
25 | #include <linux/module.h> | |
26 | #include <linux/fs.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/list.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/dma-mapping.h> | |
31 | #include <linux/cdrom.h> | |
32 | #include <linux/genhd.h> | |
33 | #include <linux/bio.h> | |
34 | #include <linux/blkdev.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/device.h> | |
8a6cfeb6 | 37 | #include <linux/smp_lock.h> |
74ee1a75 AM |
38 | #include <linux/wait.h> |
39 | #include <linux/workqueue.h> | |
40 | #include <linux/platform_device.h> | |
41 | #include <scsi/scsi.h> | |
42 | #include <asm/io.h> | |
43 | #include <asm/dma.h> | |
44 | #include <asm/delay.h> | |
0764bff4 PM |
45 | #include <mach/dma.h> |
46 | #include <mach/sysasic.h> | |
74ee1a75 AM |
47 | |
48 | #define GDROM_DEV_NAME "gdrom" | |
49 | #define GD_SESSION_OFFSET 150 | |
50 | ||
51 | /* GD Rom commands */ | |
52 | #define GDROM_COM_SOFTRESET 0x08 | |
53 | #define GDROM_COM_EXECDIAG 0x90 | |
54 | #define GDROM_COM_PACKET 0xA0 | |
55 | #define GDROM_COM_IDDEV 0xA1 | |
56 | ||
57 | /* GD Rom registers */ | |
58 | #define GDROM_BASE_REG 0xA05F7000 | |
59 | #define GDROM_ALTSTATUS_REG (GDROM_BASE_REG + 0x18) | |
60 | #define GDROM_DATA_REG (GDROM_BASE_REG + 0x80) | |
61 | #define GDROM_ERROR_REG (GDROM_BASE_REG + 0x84) | |
62 | #define GDROM_INTSEC_REG (GDROM_BASE_REG + 0x88) | |
63 | #define GDROM_SECNUM_REG (GDROM_BASE_REG + 0x8C) | |
64 | #define GDROM_BCL_REG (GDROM_BASE_REG + 0x90) | |
65 | #define GDROM_BCH_REG (GDROM_BASE_REG + 0x94) | |
66 | #define GDROM_DSEL_REG (GDROM_BASE_REG + 0x98) | |
67 | #define GDROM_STATUSCOMMAND_REG (GDROM_BASE_REG + 0x9C) | |
68 | #define GDROM_RESET_REG (GDROM_BASE_REG + 0x4E4) | |
69 | ||
70 | #define GDROM_DMA_STARTADDR_REG (GDROM_BASE_REG + 0x404) | |
71 | #define GDROM_DMA_LENGTH_REG (GDROM_BASE_REG + 0x408) | |
72 | #define GDROM_DMA_DIRECTION_REG (GDROM_BASE_REG + 0x40C) | |
73 | #define GDROM_DMA_ENABLE_REG (GDROM_BASE_REG + 0x414) | |
74 | #define GDROM_DMA_STATUS_REG (GDROM_BASE_REG + 0x418) | |
75 | #define GDROM_DMA_WAIT_REG (GDROM_BASE_REG + 0x4A0) | |
76 | #define GDROM_DMA_ACCESS_CTRL_REG (GDROM_BASE_REG + 0x4B8) | |
77 | ||
78 | #define GDROM_HARD_SECTOR 2048 | |
79 | #define BLOCK_LAYER_SECTOR 512 | |
80 | #define GD_TO_BLK 4 | |
81 | ||
82 | #define GDROM_DEFAULT_TIMEOUT (HZ * 7) | |
83 | ||
84 | static const struct { | |
85 | int sense_key; | |
86 | const char * const text; | |
87 | } sense_texts[] = { | |
88 | {NO_SENSE, "OK"}, | |
89 | {RECOVERED_ERROR, "Recovered from error"}, | |
90 | {NOT_READY, "Device not ready"}, | |
91 | {MEDIUM_ERROR, "Disk not ready"}, | |
92 | {HARDWARE_ERROR, "Hardware error"}, | |
93 | {ILLEGAL_REQUEST, "Command has failed"}, | |
94 | {UNIT_ATTENTION, "Device needs attention - disk may have been changed"}, | |
95 | {DATA_PROTECT, "Data protection error"}, | |
96 | {ABORTED_COMMAND, "Command aborted"}, | |
97 | }; | |
98 | ||
99 | static struct platform_device *pd; | |
100 | static int gdrom_major; | |
101 | static DECLARE_WAIT_QUEUE_HEAD(command_queue); | |
102 | static DECLARE_WAIT_QUEUE_HEAD(request_queue); | |
103 | ||
104 | static DEFINE_SPINLOCK(gdrom_lock); | |
105 | static void gdrom_readdisk_dma(struct work_struct *work); | |
106 | static DECLARE_WORK(work, gdrom_readdisk_dma); | |
107 | static LIST_HEAD(gdrom_deferred); | |
108 | ||
109 | struct gdromtoc { | |
110 | unsigned int entry[99]; | |
111 | unsigned int first, last; | |
112 | unsigned int leadout; | |
113 | }; | |
114 | ||
115 | static struct gdrom_unit { | |
116 | struct gendisk *disk; | |
117 | struct cdrom_device_info *cd_info; | |
118 | int status; | |
119 | int pending; | |
120 | int transfer; | |
121 | char disk_type; | |
122 | struct gdromtoc *toc; | |
123 | struct request_queue *gdrom_rq; | |
124 | } gd; | |
125 | ||
126 | struct gdrom_id { | |
127 | char mid; | |
128 | char modid; | |
129 | char verid; | |
130 | char padA[13]; | |
131 | char mname[16]; | |
132 | char modname[16]; | |
133 | char firmver[16]; | |
134 | char padB[16]; | |
135 | }; | |
136 | ||
137 | static int gdrom_getsense(short *bufstring); | |
138 | static int gdrom_packetcommand(struct cdrom_device_info *cd_info, | |
139 | struct packet_command *command); | |
140 | static int gdrom_hardreset(struct cdrom_device_info *cd_info); | |
141 | ||
142 | static bool gdrom_is_busy(void) | |
143 | { | |
144 | return (ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) != 0; | |
145 | } | |
146 | ||
147 | static bool gdrom_data_request(void) | |
148 | { | |
149 | return (ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) == 8; | |
150 | } | |
151 | ||
152 | static bool gdrom_wait_clrbusy(void) | |
153 | { | |
154 | unsigned long timeout = jiffies + GDROM_DEFAULT_TIMEOUT; | |
155 | while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) && | |
156 | (time_before(jiffies, timeout))) | |
157 | cpu_relax(); | |
158 | return time_before(jiffies, timeout + 1); | |
159 | } | |
160 | ||
161 | static bool gdrom_wait_busy_sleeps(void) | |
162 | { | |
163 | unsigned long timeout; | |
164 | /* Wait to get busy first */ | |
165 | timeout = jiffies + GDROM_DEFAULT_TIMEOUT; | |
166 | while (!gdrom_is_busy() && time_before(jiffies, timeout)) | |
167 | cpu_relax(); | |
168 | /* Now wait for busy to clear */ | |
169 | return gdrom_wait_clrbusy(); | |
170 | } | |
171 | ||
172 | static void gdrom_identifydevice(void *buf) | |
173 | { | |
174 | int c; | |
175 | short *data = buf; | |
176 | /* If the device won't clear it has probably | |
177 | * been hit by a serious failure - but we'll | |
178 | * try to return a sense key even so */ | |
179 | if (!gdrom_wait_clrbusy()) { | |
180 | gdrom_getsense(NULL); | |
181 | return; | |
182 | } | |
183 | ctrl_outb(GDROM_COM_IDDEV, GDROM_STATUSCOMMAND_REG); | |
184 | if (!gdrom_wait_busy_sleeps()) { | |
185 | gdrom_getsense(NULL); | |
186 | return; | |
187 | } | |
188 | /* now read in the data */ | |
189 | for (c = 0; c < 40; c++) | |
190 | data[c] = ctrl_inw(GDROM_DATA_REG); | |
191 | } | |
192 | ||
193 | static void gdrom_spicommand(void *spi_string, int buflen) | |
194 | { | |
195 | short *cmd = spi_string; | |
196 | unsigned long timeout; | |
197 | ||
198 | /* ensure IRQ_WAIT is set */ | |
199 | ctrl_outb(0x08, GDROM_ALTSTATUS_REG); | |
200 | /* specify how many bytes we expect back */ | |
201 | ctrl_outb(buflen & 0xFF, GDROM_BCL_REG); | |
202 | ctrl_outb((buflen >> 8) & 0xFF, GDROM_BCH_REG); | |
203 | /* other parameters */ | |
204 | ctrl_outb(0, GDROM_INTSEC_REG); | |
205 | ctrl_outb(0, GDROM_SECNUM_REG); | |
206 | ctrl_outb(0, GDROM_ERROR_REG); | |
207 | /* Wait until we can go */ | |
208 | if (!gdrom_wait_clrbusy()) { | |
209 | gdrom_getsense(NULL); | |
210 | return; | |
211 | } | |
212 | timeout = jiffies + GDROM_DEFAULT_TIMEOUT; | |
213 | ctrl_outb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); | |
214 | while (!gdrom_data_request() && time_before(jiffies, timeout)) | |
215 | cpu_relax(); | |
216 | if (!time_before(jiffies, timeout + 1)) { | |
217 | gdrom_getsense(NULL); | |
218 | return; | |
219 | } | |
54d5102f | 220 | outsw(GDROM_DATA_REG, cmd, 6); |
74ee1a75 AM |
221 | } |
222 | ||
223 | ||
224 | /* gdrom_command_executediagnostic: | |
225 | * Used to probe for presence of working GDROM | |
226 | * Restarts GDROM device and then applies standard ATA 3 | |
227 | * Execute Diagnostic Command: a return of '1' indicates device 0 | |
228 | * present and device 1 absent | |
229 | */ | |
230 | static char gdrom_execute_diagnostic(void) | |
231 | { | |
232 | gdrom_hardreset(gd.cd_info); | |
233 | if (!gdrom_wait_clrbusy()) | |
234 | return 0; | |
235 | ctrl_outb(GDROM_COM_EXECDIAG, GDROM_STATUSCOMMAND_REG); | |
236 | if (!gdrom_wait_busy_sleeps()) | |
237 | return 0; | |
238 | return ctrl_inb(GDROM_ERROR_REG); | |
239 | } | |
240 | ||
241 | /* | |
242 | * Prepare disk command | |
243 | * byte 0 = 0x70 | |
244 | * byte 1 = 0x1f | |
245 | */ | |
246 | static int gdrom_preparedisk_cmd(void) | |
247 | { | |
248 | struct packet_command *spin_command; | |
249 | spin_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
250 | if (!spin_command) | |
251 | return -ENOMEM; | |
252 | spin_command->cmd[0] = 0x70; | |
253 | spin_command->cmd[2] = 0x1f; | |
254 | spin_command->buflen = 0; | |
255 | gd.pending = 1; | |
256 | gdrom_packetcommand(gd.cd_info, spin_command); | |
257 | /* 60 second timeout */ | |
258 | wait_event_interruptible_timeout(command_queue, gd.pending == 0, | |
259 | GDROM_DEFAULT_TIMEOUT); | |
260 | gd.pending = 0; | |
261 | kfree(spin_command); | |
262 | if (gd.status & 0x01) { | |
263 | /* log an error */ | |
264 | gdrom_getsense(NULL); | |
265 | return -EIO; | |
266 | } | |
267 | return 0; | |
268 | } | |
269 | ||
270 | /* | |
271 | * Read TOC command | |
272 | * byte 0 = 0x14 | |
273 | * byte 1 = session | |
274 | * byte 3 = sizeof TOC >> 8 ie upper byte | |
275 | * byte 4 = sizeof TOC & 0xff ie lower byte | |
276 | */ | |
277 | static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session) | |
278 | { | |
279 | int tocsize; | |
280 | struct packet_command *toc_command; | |
281 | int err = 0; | |
282 | ||
283 | toc_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
284 | if (!toc_command) | |
285 | return -ENOMEM; | |
286 | tocsize = sizeof(struct gdromtoc); | |
287 | toc_command->cmd[0] = 0x14; | |
288 | toc_command->cmd[1] = session; | |
289 | toc_command->cmd[3] = tocsize >> 8; | |
290 | toc_command->cmd[4] = tocsize & 0xff; | |
291 | toc_command->buflen = tocsize; | |
292 | if (gd.pending) { | |
293 | err = -EBUSY; | |
294 | goto cleanup_readtoc_final; | |
295 | } | |
296 | gd.pending = 1; | |
297 | gdrom_packetcommand(gd.cd_info, toc_command); | |
298 | wait_event_interruptible_timeout(command_queue, gd.pending == 0, | |
299 | GDROM_DEFAULT_TIMEOUT); | |
300 | if (gd.pending) { | |
301 | err = -EINVAL; | |
302 | goto cleanup_readtoc; | |
303 | } | |
54d5102f | 304 | insw(GDROM_DATA_REG, toc, tocsize/2); |
74ee1a75 AM |
305 | if (gd.status & 0x01) |
306 | err = -EINVAL; | |
307 | ||
308 | cleanup_readtoc: | |
309 | gd.pending = 0; | |
310 | cleanup_readtoc_final: | |
311 | kfree(toc_command); | |
312 | return err; | |
313 | } | |
314 | ||
315 | /* TOC helpers */ | |
316 | static int get_entry_lba(int track) | |
317 | { | |
318 | return (cpu_to_be32(track & 0xffffff00) - GD_SESSION_OFFSET); | |
319 | } | |
320 | ||
321 | static int get_entry_q_ctrl(int track) | |
322 | { | |
323 | return (track & 0x000000f0) >> 4; | |
324 | } | |
325 | ||
326 | static int get_entry_track(int track) | |
327 | { | |
328 | return (track & 0x0000ff00) >> 8; | |
329 | } | |
330 | ||
331 | static int gdrom_get_last_session(struct cdrom_device_info *cd_info, | |
332 | struct cdrom_multisession *ms_info) | |
333 | { | |
334 | int fentry, lentry, track, data, tocuse, err; | |
335 | if (!gd.toc) | |
336 | return -ENOMEM; | |
337 | tocuse = 1; | |
338 | /* Check if GD-ROM */ | |
339 | err = gdrom_readtoc_cmd(gd.toc, 1); | |
340 | /* Not a GD-ROM so check if standard CD-ROM */ | |
341 | if (err) { | |
342 | tocuse = 0; | |
343 | err = gdrom_readtoc_cmd(gd.toc, 0); | |
344 | if (err) { | |
e597cd09 | 345 | pr_info("Could not get CD table of contents\n"); |
74ee1a75 AM |
346 | return -ENXIO; |
347 | } | |
348 | } | |
349 | ||
350 | fentry = get_entry_track(gd.toc->first); | |
351 | lentry = get_entry_track(gd.toc->last); | |
352 | /* Find the first data track */ | |
353 | track = get_entry_track(gd.toc->last); | |
354 | do { | |
355 | data = gd.toc->entry[track - 1]; | |
356 | if (get_entry_q_ctrl(data)) | |
357 | break; /* ie a real data track */ | |
358 | track--; | |
359 | } while (track >= fentry); | |
360 | ||
361 | if ((track > 100) || (track < get_entry_track(gd.toc->first))) { | |
e597cd09 | 362 | pr_info("No data on the last session of the CD\n"); |
74ee1a75 AM |
363 | gdrom_getsense(NULL); |
364 | return -ENXIO; | |
365 | } | |
366 | ||
367 | ms_info->addr_format = CDROM_LBA; | |
368 | ms_info->addr.lba = get_entry_lba(data); | |
369 | ms_info->xa_flag = 1; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | static int gdrom_open(struct cdrom_device_info *cd_info, int purpose) | |
374 | { | |
375 | /* spin up the disk */ | |
376 | return gdrom_preparedisk_cmd(); | |
377 | } | |
378 | ||
379 | /* this function is required even if empty */ | |
380 | static void gdrom_release(struct cdrom_device_info *cd_info) | |
381 | { | |
382 | } | |
383 | ||
384 | static int gdrom_drivestatus(struct cdrom_device_info *cd_info, int ignore) | |
385 | { | |
386 | /* read the sense key */ | |
387 | char sense = ctrl_inb(GDROM_ERROR_REG); | |
388 | sense &= 0xF0; | |
389 | if (sense == 0) | |
390 | return CDS_DISC_OK; | |
391 | if (sense == 0x20) | |
392 | return CDS_DRIVE_NOT_READY; | |
393 | /* default */ | |
394 | return CDS_NO_INFO; | |
395 | } | |
396 | ||
397 | static int gdrom_mediachanged(struct cdrom_device_info *cd_info, int ignore) | |
398 | { | |
399 | /* check the sense key */ | |
400 | return (ctrl_inb(GDROM_ERROR_REG) & 0xF0) == 0x60; | |
401 | } | |
402 | ||
403 | /* reset the G1 bus */ | |
404 | static int gdrom_hardreset(struct cdrom_device_info *cd_info) | |
405 | { | |
406 | int count; | |
407 | ctrl_outl(0x1fffff, GDROM_RESET_REG); | |
408 | for (count = 0xa0000000; count < 0xa0200000; count += 4) | |
409 | ctrl_inl(count); | |
410 | return 0; | |
411 | } | |
412 | ||
413 | /* keep the function looking like the universal | |
414 | * CD Rom specification - returning int */ | |
415 | static int gdrom_packetcommand(struct cdrom_device_info *cd_info, | |
416 | struct packet_command *command) | |
417 | { | |
418 | gdrom_spicommand(&command->cmd, command->buflen); | |
419 | return 0; | |
420 | } | |
421 | ||
422 | /* Get Sense SPI command | |
423 | * From Marcus Comstedt | |
424 | * cmd = 0x13 | |
425 | * cmd + 4 = length of returned buffer | |
426 | * Returns 5 16 bit words | |
427 | */ | |
428 | static int gdrom_getsense(short *bufstring) | |
429 | { | |
430 | struct packet_command *sense_command; | |
431 | short sense[5]; | |
432 | int sense_key; | |
433 | int err = -EIO; | |
434 | ||
435 | sense_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
436 | if (!sense_command) | |
437 | return -ENOMEM; | |
438 | sense_command->cmd[0] = 0x13; | |
439 | sense_command->cmd[4] = 10; | |
440 | sense_command->buflen = 10; | |
441 | /* even if something is pending try to get | |
442 | * the sense key if possible */ | |
443 | if (gd.pending && !gdrom_wait_clrbusy()) { | |
444 | err = -EBUSY; | |
445 | goto cleanup_sense_final; | |
446 | } | |
447 | gd.pending = 1; | |
448 | gdrom_packetcommand(gd.cd_info, sense_command); | |
449 | wait_event_interruptible_timeout(command_queue, gd.pending == 0, | |
450 | GDROM_DEFAULT_TIMEOUT); | |
451 | if (gd.pending) | |
452 | goto cleanup_sense; | |
54d5102f | 453 | insw(GDROM_DATA_REG, &sense, sense_command->buflen/2); |
74ee1a75 | 454 | if (sense[1] & 40) { |
e597cd09 | 455 | pr_info("Drive not ready - command aborted\n"); |
74ee1a75 AM |
456 | goto cleanup_sense; |
457 | } | |
458 | sense_key = sense[1] & 0x0F; | |
459 | if (sense_key < ARRAY_SIZE(sense_texts)) | |
e597cd09 | 460 | pr_info("%s\n", sense_texts[sense_key].text); |
74ee1a75 | 461 | else |
e597cd09 | 462 | pr_err("Unknown sense key: %d\n", sense_key); |
74ee1a75 AM |
463 | if (bufstring) /* return addional sense data */ |
464 | memcpy(bufstring, &sense[4], 2); | |
465 | if (sense_key < 2) | |
466 | err = 0; | |
467 | ||
468 | cleanup_sense: | |
469 | gd.pending = 0; | |
470 | cleanup_sense_final: | |
471 | kfree(sense_command); | |
472 | return err; | |
473 | } | |
474 | ||
d15cad5d BP |
475 | static int gdrom_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, |
476 | void *arg) | |
477 | { | |
478 | return -EINVAL; | |
479 | } | |
480 | ||
74ee1a75 AM |
481 | static struct cdrom_device_ops gdrom_ops = { |
482 | .open = gdrom_open, | |
483 | .release = gdrom_release, | |
484 | .drive_status = gdrom_drivestatus, | |
485 | .media_changed = gdrom_mediachanged, | |
486 | .get_last_session = gdrom_get_last_session, | |
487 | .reset = gdrom_hardreset, | |
d15cad5d | 488 | .audio_ioctl = gdrom_audio_ioctl, |
74ee1a75 AM |
489 | .capability = CDC_MULTI_SESSION | CDC_MEDIA_CHANGED | |
490 | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R, | |
491 | .n_minors = 1, | |
492 | }; | |
493 | ||
8389feb4 | 494 | static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode) |
74ee1a75 | 495 | { |
8389feb4 | 496 | return cdrom_open(gd.cd_info, bdev, mode); |
74ee1a75 AM |
497 | } |
498 | ||
545727f3 | 499 | static int gdrom_bdops_release(struct gendisk *disk, fmode_t mode) |
74ee1a75 | 500 | { |
545727f3 NI |
501 | cdrom_release(gd.cd_info, mode); |
502 | return 0; | |
74ee1a75 AM |
503 | } |
504 | ||
505 | static int gdrom_bdops_mediachanged(struct gendisk *disk) | |
506 | { | |
507 | return cdrom_media_changed(gd.cd_info); | |
508 | } | |
509 | ||
8389feb4 | 510 | static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode, |
74ee1a75 AM |
511 | unsigned cmd, unsigned long arg) |
512 | { | |
8a6cfeb6 AB |
513 | int ret; |
514 | ||
515 | lock_kernel(); | |
516 | ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg); | |
517 | unlock_kernel(); | |
518 | ||
519 | return ret; | |
74ee1a75 AM |
520 | } |
521 | ||
83d5cde4 | 522 | static const struct block_device_operations gdrom_bdops = { |
74ee1a75 | 523 | .owner = THIS_MODULE, |
8389feb4 AV |
524 | .open = gdrom_bdops_open, |
525 | .release = gdrom_bdops_release, | |
74ee1a75 | 526 | .media_changed = gdrom_bdops_mediachanged, |
8a6cfeb6 | 527 | .ioctl = gdrom_bdops_ioctl, |
74ee1a75 AM |
528 | }; |
529 | ||
530 | static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id) | |
531 | { | |
532 | gd.status = ctrl_inb(GDROM_STATUSCOMMAND_REG); | |
533 | if (gd.pending != 1) | |
534 | return IRQ_HANDLED; | |
535 | gd.pending = 0; | |
536 | wake_up_interruptible(&command_queue); | |
537 | return IRQ_HANDLED; | |
538 | } | |
539 | ||
540 | static irqreturn_t gdrom_dma_interrupt(int irq, void *dev_id) | |
541 | { | |
542 | gd.status = ctrl_inb(GDROM_STATUSCOMMAND_REG); | |
543 | if (gd.transfer != 1) | |
544 | return IRQ_HANDLED; | |
545 | gd.transfer = 0; | |
546 | wake_up_interruptible(&request_queue); | |
547 | return IRQ_HANDLED; | |
548 | } | |
549 | ||
550 | static int __devinit gdrom_set_interrupt_handlers(void) | |
551 | { | |
552 | int err; | |
553 | ||
554 | err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt, | |
555 | IRQF_DISABLED, "gdrom_command", &gd); | |
556 | if (err) | |
557 | return err; | |
558 | err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt, | |
559 | IRQF_DISABLED, "gdrom_dma", &gd); | |
560 | if (err) | |
561 | free_irq(HW_EVENT_GDROM_CMD, &gd); | |
562 | return err; | |
563 | } | |
564 | ||
565 | /* Implement DMA read using SPI command | |
566 | * 0 -> 0x30 | |
567 | * 1 -> mode | |
568 | * 2 -> block >> 16 | |
569 | * 3 -> block >> 8 | |
570 | * 4 -> block | |
571 | * 8 -> sectors >> 16 | |
572 | * 9 -> sectors >> 8 | |
573 | * 10 -> sectors | |
574 | */ | |
575 | static void gdrom_readdisk_dma(struct work_struct *work) | |
576 | { | |
577 | int err, block, block_cnt; | |
578 | struct packet_command *read_command; | |
579 | struct list_head *elem, *next; | |
580 | struct request *req; | |
581 | unsigned long timeout; | |
582 | ||
583 | if (list_empty(&gdrom_deferred)) | |
584 | return; | |
585 | read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
586 | if (!read_command) | |
587 | return; /* get more memory later? */ | |
588 | read_command->cmd[0] = 0x30; | |
589 | read_command->cmd[1] = 0x20; | |
590 | spin_lock(&gdrom_lock); | |
591 | list_for_each_safe(elem, next, &gdrom_deferred) { | |
592 | req = list_entry(elem, struct request, queuelist); | |
593 | spin_unlock(&gdrom_lock); | |
83096ebf TH |
594 | block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET; |
595 | block_cnt = blk_rq_sectors(req)/GD_TO_BLK; | |
54d5102f | 596 | ctrl_outl(virt_to_phys(req->buffer), GDROM_DMA_STARTADDR_REG); |
74ee1a75 AM |
597 | ctrl_outl(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG); |
598 | ctrl_outl(1, GDROM_DMA_DIRECTION_REG); | |
599 | ctrl_outl(1, GDROM_DMA_ENABLE_REG); | |
600 | read_command->cmd[2] = (block >> 16) & 0xFF; | |
601 | read_command->cmd[3] = (block >> 8) & 0xFF; | |
602 | read_command->cmd[4] = block & 0xFF; | |
603 | read_command->cmd[8] = (block_cnt >> 16) & 0xFF; | |
604 | read_command->cmd[9] = (block_cnt >> 8) & 0xFF; | |
605 | read_command->cmd[10] = block_cnt & 0xFF; | |
606 | /* set for DMA */ | |
607 | ctrl_outb(1, GDROM_ERROR_REG); | |
608 | /* other registers */ | |
609 | ctrl_outb(0, GDROM_SECNUM_REG); | |
610 | ctrl_outb(0, GDROM_BCL_REG); | |
611 | ctrl_outb(0, GDROM_BCH_REG); | |
612 | ctrl_outb(0, GDROM_DSEL_REG); | |
613 | ctrl_outb(0, GDROM_INTSEC_REG); | |
614 | /* Wait for registers to reset after any previous activity */ | |
615 | timeout = jiffies + HZ / 2; | |
616 | while (gdrom_is_busy() && time_before(jiffies, timeout)) | |
617 | cpu_relax(); | |
618 | ctrl_outb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); | |
619 | timeout = jiffies + HZ / 2; | |
620 | /* Wait for packet command to finish */ | |
621 | while (gdrom_is_busy() && time_before(jiffies, timeout)) | |
622 | cpu_relax(); | |
623 | gd.pending = 1; | |
624 | gd.transfer = 1; | |
54d5102f | 625 | outsw(GDROM_DATA_REG, &read_command->cmd, 6); |
74ee1a75 AM |
626 | timeout = jiffies + HZ / 2; |
627 | /* Wait for any pending DMA to finish */ | |
628 | while (ctrl_inb(GDROM_DMA_STATUS_REG) && | |
629 | time_before(jiffies, timeout)) | |
630 | cpu_relax(); | |
631 | /* start transfer */ | |
632 | ctrl_outb(1, GDROM_DMA_STATUS_REG); | |
633 | wait_event_interruptible_timeout(request_queue, | |
634 | gd.transfer == 0, GDROM_DEFAULT_TIMEOUT); | |
7afb3a6e | 635 | err = gd.transfer ? -EIO : 0; |
74ee1a75 AM |
636 | gd.transfer = 0; |
637 | gd.pending = 0; | |
638 | /* now seek to take the request spinlock | |
639 | * before handling ending the request */ | |
640 | spin_lock(&gdrom_lock); | |
641 | list_del_init(&req->queuelist); | |
40cbbb78 | 642 | __blk_end_request_all(req, err); |
74ee1a75 AM |
643 | } |
644 | spin_unlock(&gdrom_lock); | |
645 | kfree(read_command); | |
646 | } | |
647 | ||
74ee1a75 AM |
648 | static void gdrom_request(struct request_queue *rq) |
649 | { | |
650 | struct request *req; | |
651 | ||
9934c8c0 | 652 | while ((req = blk_fetch_request(rq)) != NULL) { |
33659ebb | 653 | if (req->cmd_type != REQ_TYPE_FS) { |
e597cd09 | 654 | printk(KERN_DEBUG "gdrom: Non-fs request ignored\n"); |
23430468 TH |
655 | __blk_end_request_all(req, -EIO); |
656 | continue; | |
74ee1a75 AM |
657 | } |
658 | if (rq_data_dir(req) != READ) { | |
e597cd09 | 659 | pr_notice("Read only device - write request ignored\n"); |
23430468 TH |
660 | __blk_end_request_all(req, -EIO); |
661 | continue; | |
74ee1a75 | 662 | } |
23430468 TH |
663 | |
664 | /* | |
665 | * Add to list of deferred work and then schedule | |
666 | * workqueue. | |
667 | */ | |
668 | list_add_tail(&req->queuelist, &gdrom_deferred); | |
669 | schedule_work(&work); | |
74ee1a75 AM |
670 | } |
671 | } | |
672 | ||
673 | /* Print string identifying GD ROM device */ | |
674 | static int __devinit gdrom_outputversion(void) | |
675 | { | |
676 | struct gdrom_id *id; | |
677 | char *model_name, *manuf_name, *firmw_ver; | |
678 | int err = -ENOMEM; | |
679 | ||
680 | /* query device ID */ | |
681 | id = kzalloc(sizeof(struct gdrom_id), GFP_KERNEL); | |
682 | if (!id) | |
683 | return err; | |
684 | gdrom_identifydevice(id); | |
685 | model_name = kstrndup(id->modname, 16, GFP_KERNEL); | |
686 | if (!model_name) | |
687 | goto free_id; | |
688 | manuf_name = kstrndup(id->mname, 16, GFP_KERNEL); | |
689 | if (!manuf_name) | |
690 | goto free_model_name; | |
691 | firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL); | |
692 | if (!firmw_ver) | |
693 | goto free_manuf_name; | |
e597cd09 | 694 | pr_info("%s from %s with firmware %s\n", |
74ee1a75 AM |
695 | model_name, manuf_name, firmw_ver); |
696 | err = 0; | |
697 | kfree(firmw_ver); | |
698 | free_manuf_name: | |
699 | kfree(manuf_name); | |
700 | free_model_name: | |
701 | kfree(model_name); | |
702 | free_id: | |
703 | kfree(id); | |
704 | return err; | |
705 | } | |
706 | ||
707 | /* set the default mode for DMA transfer */ | |
708 | static int __devinit gdrom_init_dma_mode(void) | |
709 | { | |
710 | ctrl_outb(0x13, GDROM_ERROR_REG); | |
711 | ctrl_outb(0x22, GDROM_INTSEC_REG); | |
712 | if (!gdrom_wait_clrbusy()) | |
713 | return -EBUSY; | |
714 | ctrl_outb(0xEF, GDROM_STATUSCOMMAND_REG); | |
715 | if (!gdrom_wait_busy_sleeps()) | |
716 | return -EBUSY; | |
717 | /* Memory protection setting for GDROM DMA | |
718 | * Bits 31 - 16 security: 0x8843 | |
719 | * Bits 15 and 7 reserved (0) | |
720 | * Bits 14 - 8 start of transfer range in 1 MB blocks OR'ed with 0x80 | |
721 | * Bits 6 - 0 end of transfer range in 1 MB blocks OR'ed with 0x80 | |
722 | * (0x40 | 0x80) = start range at 0x0C000000 | |
723 | * (0x7F | 0x80) = end range at 0x0FFFFFFF */ | |
724 | ctrl_outl(0x8843407F, GDROM_DMA_ACCESS_CTRL_REG); | |
725 | ctrl_outl(9, GDROM_DMA_WAIT_REG); /* DMA word setting */ | |
726 | return 0; | |
727 | } | |
728 | ||
729 | static void __devinit probe_gdrom_setupcd(void) | |
730 | { | |
731 | gd.cd_info->ops = &gdrom_ops; | |
732 | gd.cd_info->capacity = 1; | |
733 | strcpy(gd.cd_info->name, GDROM_DEV_NAME); | |
734 | gd.cd_info->mask = CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK| | |
735 | CDC_SELECT_DISC; | |
736 | } | |
737 | ||
738 | static void __devinit probe_gdrom_setupdisk(void) | |
739 | { | |
740 | gd.disk->major = gdrom_major; | |
741 | gd.disk->first_minor = 1; | |
742 | gd.disk->minors = 1; | |
743 | strcpy(gd.disk->disk_name, GDROM_DEV_NAME); | |
744 | } | |
745 | ||
746 | static int __devinit probe_gdrom_setupqueue(void) | |
747 | { | |
e1defc4f | 748 | blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR); |
74ee1a75 | 749 | /* using DMA so memory will need to be contiguous */ |
8a78362c | 750 | blk_queue_max_segments(gd.gdrom_rq, 1); |
74ee1a75 AM |
751 | /* set a large max size to get most from DMA */ |
752 | blk_queue_max_segment_size(gd.gdrom_rq, 0x40000); | |
753 | gd.disk->queue = gd.gdrom_rq; | |
754 | return gdrom_init_dma_mode(); | |
755 | } | |
756 | ||
757 | /* | |
758 | * register this as a block device and as compliant with the | |
759 | * universal CD Rom driver interface | |
760 | */ | |
761 | static int __devinit probe_gdrom(struct platform_device *devptr) | |
762 | { | |
763 | int err; | |
764 | /* Start the device */ | |
765 | if (gdrom_execute_diagnostic() != 1) { | |
e597cd09 | 766 | pr_warning("ATA Probe for GDROM failed\n"); |
74ee1a75 AM |
767 | return -ENODEV; |
768 | } | |
769 | /* Print out firmware ID */ | |
770 | if (gdrom_outputversion()) | |
771 | return -ENOMEM; | |
772 | /* Register GDROM */ | |
773 | gdrom_major = register_blkdev(0, GDROM_DEV_NAME); | |
774 | if (gdrom_major <= 0) | |
775 | return gdrom_major; | |
e597cd09 | 776 | pr_info("Registered with major number %d\n", |
74ee1a75 AM |
777 | gdrom_major); |
778 | /* Specify basic properties of drive */ | |
779 | gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL); | |
780 | if (!gd.cd_info) { | |
781 | err = -ENOMEM; | |
782 | goto probe_fail_no_mem; | |
783 | } | |
784 | probe_gdrom_setupcd(); | |
785 | gd.disk = alloc_disk(1); | |
786 | if (!gd.disk) { | |
787 | err = -ENODEV; | |
788 | goto probe_fail_no_disk; | |
789 | } | |
790 | probe_gdrom_setupdisk(); | |
791 | if (register_cdrom(gd.cd_info)) { | |
792 | err = -ENODEV; | |
793 | goto probe_fail_cdrom_register; | |
794 | } | |
795 | gd.disk->fops = &gdrom_bdops; | |
796 | /* latch on to the interrupt */ | |
797 | err = gdrom_set_interrupt_handlers(); | |
798 | if (err) | |
799 | goto probe_fail_cmdirq_register; | |
800 | gd.gdrom_rq = blk_init_queue(gdrom_request, &gdrom_lock); | |
801 | if (!gd.gdrom_rq) | |
802 | goto probe_fail_requestq; | |
803 | ||
804 | err = probe_gdrom_setupqueue(); | |
805 | if (err) | |
806 | goto probe_fail_toc; | |
807 | ||
808 | gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL); | |
809 | if (!gd.toc) | |
810 | goto probe_fail_toc; | |
811 | add_disk(gd.disk); | |
812 | return 0; | |
813 | ||
814 | probe_fail_toc: | |
815 | blk_cleanup_queue(gd.gdrom_rq); | |
816 | probe_fail_requestq: | |
817 | free_irq(HW_EVENT_GDROM_DMA, &gd); | |
818 | free_irq(HW_EVENT_GDROM_CMD, &gd); | |
819 | probe_fail_cmdirq_register: | |
820 | probe_fail_cdrom_register: | |
821 | del_gendisk(gd.disk); | |
822 | probe_fail_no_disk: | |
823 | kfree(gd.cd_info); | |
824 | unregister_blkdev(gdrom_major, GDROM_DEV_NAME); | |
825 | gdrom_major = 0; | |
826 | probe_fail_no_mem: | |
e597cd09 | 827 | pr_warning("Probe failed - error is 0x%X\n", err); |
74ee1a75 AM |
828 | return err; |
829 | } | |
830 | ||
831 | static int __devexit remove_gdrom(struct platform_device *devptr) | |
832 | { | |
833 | flush_scheduled_work(); | |
834 | blk_cleanup_queue(gd.gdrom_rq); | |
835 | free_irq(HW_EVENT_GDROM_CMD, &gd); | |
836 | free_irq(HW_EVENT_GDROM_DMA, &gd); | |
837 | del_gendisk(gd.disk); | |
838 | if (gdrom_major) | |
839 | unregister_blkdev(gdrom_major, GDROM_DEV_NAME); | |
0a0c4114 AM |
840 | unregister_cdrom(gd.cd_info); |
841 | ||
842 | return 0; | |
74ee1a75 AM |
843 | } |
844 | ||
845 | static struct platform_driver gdrom_driver = { | |
846 | .probe = probe_gdrom, | |
847 | .remove = __devexit_p(remove_gdrom), | |
848 | .driver = { | |
849 | .name = GDROM_DEV_NAME, | |
850 | }, | |
851 | }; | |
852 | ||
853 | static int __init init_gdrom(void) | |
854 | { | |
855 | int rc; | |
856 | gd.toc = NULL; | |
857 | rc = platform_driver_register(&gdrom_driver); | |
858 | if (rc) | |
859 | return rc; | |
860 | pd = platform_device_register_simple(GDROM_DEV_NAME, -1, NULL, 0); | |
861 | if (IS_ERR(pd)) { | |
862 | platform_driver_unregister(&gdrom_driver); | |
863 | return PTR_ERR(pd); | |
864 | } | |
865 | return 0; | |
866 | } | |
867 | ||
868 | static void __exit exit_gdrom(void) | |
869 | { | |
870 | platform_device_unregister(pd); | |
871 | platform_driver_unregister(&gdrom_driver); | |
872 | kfree(gd.toc); | |
873 | } | |
874 | ||
875 | module_init(init_gdrom); | |
876 | module_exit(exit_gdrom); | |
877 | MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>"); | |
878 | MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver"); | |
879 | MODULE_LICENSE("GPL"); |