Commit | Line | Data |
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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> | |
2a48fc0a | 37 | #include <linux/mutex.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 | ||
2a48fc0a | 84 | static DEFINE_MUTEX(gdrom_mutex); |
74ee1a75 AM |
85 | static const struct { |
86 | int sense_key; | |
87 | const char * const text; | |
88 | } sense_texts[] = { | |
89 | {NO_SENSE, "OK"}, | |
90 | {RECOVERED_ERROR, "Recovered from error"}, | |
91 | {NOT_READY, "Device not ready"}, | |
92 | {MEDIUM_ERROR, "Disk not ready"}, | |
93 | {HARDWARE_ERROR, "Hardware error"}, | |
94 | {ILLEGAL_REQUEST, "Command has failed"}, | |
95 | {UNIT_ATTENTION, "Device needs attention - disk may have been changed"}, | |
96 | {DATA_PROTECT, "Data protection error"}, | |
97 | {ABORTED_COMMAND, "Command aborted"}, | |
98 | }; | |
99 | ||
100 | static struct platform_device *pd; | |
101 | static int gdrom_major; | |
102 | static DECLARE_WAIT_QUEUE_HEAD(command_queue); | |
103 | static DECLARE_WAIT_QUEUE_HEAD(request_queue); | |
104 | ||
105 | static DEFINE_SPINLOCK(gdrom_lock); | |
106 | static void gdrom_readdisk_dma(struct work_struct *work); | |
107 | static DECLARE_WORK(work, gdrom_readdisk_dma); | |
108 | static LIST_HEAD(gdrom_deferred); | |
109 | ||
110 | struct gdromtoc { | |
111 | unsigned int entry[99]; | |
112 | unsigned int first, last; | |
113 | unsigned int leadout; | |
114 | }; | |
115 | ||
116 | static struct gdrom_unit { | |
117 | struct gendisk *disk; | |
118 | struct cdrom_device_info *cd_info; | |
119 | int status; | |
120 | int pending; | |
121 | int transfer; | |
122 | char disk_type; | |
123 | struct gdromtoc *toc; | |
124 | struct request_queue *gdrom_rq; | |
125 | } gd; | |
126 | ||
127 | struct gdrom_id { | |
128 | char mid; | |
129 | char modid; | |
130 | char verid; | |
131 | char padA[13]; | |
132 | char mname[16]; | |
133 | char modname[16]; | |
134 | char firmver[16]; | |
135 | char padB[16]; | |
136 | }; | |
137 | ||
138 | static int gdrom_getsense(short *bufstring); | |
139 | static int gdrom_packetcommand(struct cdrom_device_info *cd_info, | |
140 | struct packet_command *command); | |
141 | static int gdrom_hardreset(struct cdrom_device_info *cd_info); | |
142 | ||
143 | static bool gdrom_is_busy(void) | |
144 | { | |
9eb79bb3 | 145 | return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) != 0; |
74ee1a75 AM |
146 | } |
147 | ||
148 | static bool gdrom_data_request(void) | |
149 | { | |
9eb79bb3 | 150 | return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x88) == 8; |
74ee1a75 AM |
151 | } |
152 | ||
153 | static bool gdrom_wait_clrbusy(void) | |
154 | { | |
155 | unsigned long timeout = jiffies + GDROM_DEFAULT_TIMEOUT; | |
9eb79bb3 | 156 | while ((__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) && |
74ee1a75 AM |
157 | (time_before(jiffies, timeout))) |
158 | cpu_relax(); | |
159 | return time_before(jiffies, timeout + 1); | |
160 | } | |
161 | ||
162 | static bool gdrom_wait_busy_sleeps(void) | |
163 | { | |
164 | unsigned long timeout; | |
165 | /* Wait to get busy first */ | |
166 | timeout = jiffies + GDROM_DEFAULT_TIMEOUT; | |
167 | while (!gdrom_is_busy() && time_before(jiffies, timeout)) | |
168 | cpu_relax(); | |
169 | /* Now wait for busy to clear */ | |
170 | return gdrom_wait_clrbusy(); | |
171 | } | |
172 | ||
173 | static void gdrom_identifydevice(void *buf) | |
174 | { | |
175 | int c; | |
176 | short *data = buf; | |
177 | /* If the device won't clear it has probably | |
178 | * been hit by a serious failure - but we'll | |
179 | * try to return a sense key even so */ | |
180 | if (!gdrom_wait_clrbusy()) { | |
181 | gdrom_getsense(NULL); | |
182 | return; | |
183 | } | |
9eb79bb3 | 184 | __raw_writeb(GDROM_COM_IDDEV, GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
185 | if (!gdrom_wait_busy_sleeps()) { |
186 | gdrom_getsense(NULL); | |
187 | return; | |
188 | } | |
189 | /* now read in the data */ | |
190 | for (c = 0; c < 40; c++) | |
9eb79bb3 | 191 | data[c] = __raw_readw(GDROM_DATA_REG); |
74ee1a75 AM |
192 | } |
193 | ||
194 | static void gdrom_spicommand(void *spi_string, int buflen) | |
195 | { | |
196 | short *cmd = spi_string; | |
197 | unsigned long timeout; | |
198 | ||
199 | /* ensure IRQ_WAIT is set */ | |
9eb79bb3 | 200 | __raw_writeb(0x08, GDROM_ALTSTATUS_REG); |
74ee1a75 | 201 | /* specify how many bytes we expect back */ |
9eb79bb3 PM |
202 | __raw_writeb(buflen & 0xFF, GDROM_BCL_REG); |
203 | __raw_writeb((buflen >> 8) & 0xFF, GDROM_BCH_REG); | |
74ee1a75 | 204 | /* other parameters */ |
9eb79bb3 PM |
205 | __raw_writeb(0, GDROM_INTSEC_REG); |
206 | __raw_writeb(0, GDROM_SECNUM_REG); | |
207 | __raw_writeb(0, GDROM_ERROR_REG); | |
74ee1a75 AM |
208 | /* Wait until we can go */ |
209 | if (!gdrom_wait_clrbusy()) { | |
210 | gdrom_getsense(NULL); | |
211 | return; | |
212 | } | |
213 | timeout = jiffies + GDROM_DEFAULT_TIMEOUT; | |
9eb79bb3 | 214 | __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
215 | while (!gdrom_data_request() && time_before(jiffies, timeout)) |
216 | cpu_relax(); | |
217 | if (!time_before(jiffies, timeout + 1)) { | |
218 | gdrom_getsense(NULL); | |
219 | return; | |
220 | } | |
54d5102f | 221 | outsw(GDROM_DATA_REG, cmd, 6); |
74ee1a75 AM |
222 | } |
223 | ||
224 | ||
225 | /* gdrom_command_executediagnostic: | |
226 | * Used to probe for presence of working GDROM | |
227 | * Restarts GDROM device and then applies standard ATA 3 | |
228 | * Execute Diagnostic Command: a return of '1' indicates device 0 | |
229 | * present and device 1 absent | |
230 | */ | |
231 | static char gdrom_execute_diagnostic(void) | |
232 | { | |
233 | gdrom_hardreset(gd.cd_info); | |
234 | if (!gdrom_wait_clrbusy()) | |
235 | return 0; | |
9eb79bb3 | 236 | __raw_writeb(GDROM_COM_EXECDIAG, GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
237 | if (!gdrom_wait_busy_sleeps()) |
238 | return 0; | |
9eb79bb3 | 239 | return __raw_readb(GDROM_ERROR_REG); |
74ee1a75 AM |
240 | } |
241 | ||
242 | /* | |
243 | * Prepare disk command | |
244 | * byte 0 = 0x70 | |
245 | * byte 1 = 0x1f | |
246 | */ | |
247 | static int gdrom_preparedisk_cmd(void) | |
248 | { | |
249 | struct packet_command *spin_command; | |
250 | spin_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
251 | if (!spin_command) | |
252 | return -ENOMEM; | |
253 | spin_command->cmd[0] = 0x70; | |
254 | spin_command->cmd[2] = 0x1f; | |
255 | spin_command->buflen = 0; | |
256 | gd.pending = 1; | |
257 | gdrom_packetcommand(gd.cd_info, spin_command); | |
258 | /* 60 second timeout */ | |
259 | wait_event_interruptible_timeout(command_queue, gd.pending == 0, | |
260 | GDROM_DEFAULT_TIMEOUT); | |
261 | gd.pending = 0; | |
262 | kfree(spin_command); | |
263 | if (gd.status & 0x01) { | |
264 | /* log an error */ | |
265 | gdrom_getsense(NULL); | |
266 | return -EIO; | |
267 | } | |
268 | return 0; | |
269 | } | |
270 | ||
271 | /* | |
272 | * Read TOC command | |
273 | * byte 0 = 0x14 | |
274 | * byte 1 = session | |
275 | * byte 3 = sizeof TOC >> 8 ie upper byte | |
276 | * byte 4 = sizeof TOC & 0xff ie lower byte | |
277 | */ | |
278 | static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session) | |
279 | { | |
280 | int tocsize; | |
281 | struct packet_command *toc_command; | |
282 | int err = 0; | |
283 | ||
284 | toc_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
285 | if (!toc_command) | |
286 | return -ENOMEM; | |
287 | tocsize = sizeof(struct gdromtoc); | |
288 | toc_command->cmd[0] = 0x14; | |
289 | toc_command->cmd[1] = session; | |
290 | toc_command->cmd[3] = tocsize >> 8; | |
291 | toc_command->cmd[4] = tocsize & 0xff; | |
292 | toc_command->buflen = tocsize; | |
293 | if (gd.pending) { | |
294 | err = -EBUSY; | |
295 | goto cleanup_readtoc_final; | |
296 | } | |
297 | gd.pending = 1; | |
298 | gdrom_packetcommand(gd.cd_info, toc_command); | |
299 | wait_event_interruptible_timeout(command_queue, gd.pending == 0, | |
300 | GDROM_DEFAULT_TIMEOUT); | |
301 | if (gd.pending) { | |
302 | err = -EINVAL; | |
303 | goto cleanup_readtoc; | |
304 | } | |
54d5102f | 305 | insw(GDROM_DATA_REG, toc, tocsize/2); |
74ee1a75 AM |
306 | if (gd.status & 0x01) |
307 | err = -EINVAL; | |
308 | ||
309 | cleanup_readtoc: | |
310 | gd.pending = 0; | |
311 | cleanup_readtoc_final: | |
312 | kfree(toc_command); | |
313 | return err; | |
314 | } | |
315 | ||
316 | /* TOC helpers */ | |
317 | static int get_entry_lba(int track) | |
318 | { | |
319 | return (cpu_to_be32(track & 0xffffff00) - GD_SESSION_OFFSET); | |
320 | } | |
321 | ||
322 | static int get_entry_q_ctrl(int track) | |
323 | { | |
324 | return (track & 0x000000f0) >> 4; | |
325 | } | |
326 | ||
327 | static int get_entry_track(int track) | |
328 | { | |
329 | return (track & 0x0000ff00) >> 8; | |
330 | } | |
331 | ||
332 | static int gdrom_get_last_session(struct cdrom_device_info *cd_info, | |
333 | struct cdrom_multisession *ms_info) | |
334 | { | |
335 | int fentry, lentry, track, data, tocuse, err; | |
336 | if (!gd.toc) | |
337 | return -ENOMEM; | |
338 | tocuse = 1; | |
339 | /* Check if GD-ROM */ | |
340 | err = gdrom_readtoc_cmd(gd.toc, 1); | |
341 | /* Not a GD-ROM so check if standard CD-ROM */ | |
342 | if (err) { | |
343 | tocuse = 0; | |
344 | err = gdrom_readtoc_cmd(gd.toc, 0); | |
345 | if (err) { | |
e597cd09 | 346 | pr_info("Could not get CD table of contents\n"); |
74ee1a75 AM |
347 | return -ENXIO; |
348 | } | |
349 | } | |
350 | ||
351 | fentry = get_entry_track(gd.toc->first); | |
352 | lentry = get_entry_track(gd.toc->last); | |
353 | /* Find the first data track */ | |
354 | track = get_entry_track(gd.toc->last); | |
355 | do { | |
356 | data = gd.toc->entry[track - 1]; | |
357 | if (get_entry_q_ctrl(data)) | |
358 | break; /* ie a real data track */ | |
359 | track--; | |
360 | } while (track >= fentry); | |
361 | ||
362 | if ((track > 100) || (track < get_entry_track(gd.toc->first))) { | |
e597cd09 | 363 | pr_info("No data on the last session of the CD\n"); |
74ee1a75 AM |
364 | gdrom_getsense(NULL); |
365 | return -ENXIO; | |
366 | } | |
367 | ||
368 | ms_info->addr_format = CDROM_LBA; | |
369 | ms_info->addr.lba = get_entry_lba(data); | |
370 | ms_info->xa_flag = 1; | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static int gdrom_open(struct cdrom_device_info *cd_info, int purpose) | |
375 | { | |
376 | /* spin up the disk */ | |
377 | return gdrom_preparedisk_cmd(); | |
378 | } | |
379 | ||
380 | /* this function is required even if empty */ | |
381 | static void gdrom_release(struct cdrom_device_info *cd_info) | |
382 | { | |
383 | } | |
384 | ||
385 | static int gdrom_drivestatus(struct cdrom_device_info *cd_info, int ignore) | |
386 | { | |
387 | /* read the sense key */ | |
9eb79bb3 | 388 | char sense = __raw_readb(GDROM_ERROR_REG); |
74ee1a75 AM |
389 | sense &= 0xF0; |
390 | if (sense == 0) | |
391 | return CDS_DISC_OK; | |
392 | if (sense == 0x20) | |
393 | return CDS_DRIVE_NOT_READY; | |
394 | /* default */ | |
395 | return CDS_NO_INFO; | |
396 | } | |
397 | ||
398 | static int gdrom_mediachanged(struct cdrom_device_info *cd_info, int ignore) | |
399 | { | |
400 | /* check the sense key */ | |
9eb79bb3 | 401 | return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60; |
74ee1a75 AM |
402 | } |
403 | ||
404 | /* reset the G1 bus */ | |
405 | static int gdrom_hardreset(struct cdrom_device_info *cd_info) | |
406 | { | |
407 | int count; | |
9eb79bb3 | 408 | __raw_writel(0x1fffff, GDROM_RESET_REG); |
74ee1a75 | 409 | for (count = 0xa0000000; count < 0xa0200000; count += 4) |
9eb79bb3 | 410 | __raw_readl(count); |
74ee1a75 AM |
411 | return 0; |
412 | } | |
413 | ||
414 | /* keep the function looking like the universal | |
415 | * CD Rom specification - returning int */ | |
416 | static int gdrom_packetcommand(struct cdrom_device_info *cd_info, | |
417 | struct packet_command *command) | |
418 | { | |
419 | gdrom_spicommand(&command->cmd, command->buflen); | |
420 | return 0; | |
421 | } | |
422 | ||
423 | /* Get Sense SPI command | |
424 | * From Marcus Comstedt | |
425 | * cmd = 0x13 | |
426 | * cmd + 4 = length of returned buffer | |
427 | * Returns 5 16 bit words | |
428 | */ | |
429 | static int gdrom_getsense(short *bufstring) | |
430 | { | |
431 | struct packet_command *sense_command; | |
432 | short sense[5]; | |
433 | int sense_key; | |
434 | int err = -EIO; | |
435 | ||
436 | sense_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
437 | if (!sense_command) | |
438 | return -ENOMEM; | |
439 | sense_command->cmd[0] = 0x13; | |
440 | sense_command->cmd[4] = 10; | |
441 | sense_command->buflen = 10; | |
442 | /* even if something is pending try to get | |
443 | * the sense key if possible */ | |
444 | if (gd.pending && !gdrom_wait_clrbusy()) { | |
445 | err = -EBUSY; | |
446 | goto cleanup_sense_final; | |
447 | } | |
448 | gd.pending = 1; | |
449 | gdrom_packetcommand(gd.cd_info, sense_command); | |
450 | wait_event_interruptible_timeout(command_queue, gd.pending == 0, | |
451 | GDROM_DEFAULT_TIMEOUT); | |
452 | if (gd.pending) | |
453 | goto cleanup_sense; | |
54d5102f | 454 | insw(GDROM_DATA_REG, &sense, sense_command->buflen/2); |
74ee1a75 | 455 | if (sense[1] & 40) { |
e597cd09 | 456 | pr_info("Drive not ready - command aborted\n"); |
74ee1a75 AM |
457 | goto cleanup_sense; |
458 | } | |
459 | sense_key = sense[1] & 0x0F; | |
460 | if (sense_key < ARRAY_SIZE(sense_texts)) | |
e597cd09 | 461 | pr_info("%s\n", sense_texts[sense_key].text); |
74ee1a75 | 462 | else |
e597cd09 | 463 | pr_err("Unknown sense key: %d\n", sense_key); |
74ee1a75 AM |
464 | if (bufstring) /* return addional sense data */ |
465 | memcpy(bufstring, &sense[4], 2); | |
466 | if (sense_key < 2) | |
467 | err = 0; | |
468 | ||
469 | cleanup_sense: | |
470 | gd.pending = 0; | |
471 | cleanup_sense_final: | |
472 | kfree(sense_command); | |
473 | return err; | |
474 | } | |
475 | ||
d15cad5d BP |
476 | static int gdrom_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, |
477 | void *arg) | |
478 | { | |
479 | return -EINVAL; | |
480 | } | |
481 | ||
74ee1a75 AM |
482 | static struct cdrom_device_ops gdrom_ops = { |
483 | .open = gdrom_open, | |
484 | .release = gdrom_release, | |
485 | .drive_status = gdrom_drivestatus, | |
486 | .media_changed = gdrom_mediachanged, | |
487 | .get_last_session = gdrom_get_last_session, | |
488 | .reset = gdrom_hardreset, | |
d15cad5d | 489 | .audio_ioctl = gdrom_audio_ioctl, |
74ee1a75 AM |
490 | .capability = CDC_MULTI_SESSION | CDC_MEDIA_CHANGED | |
491 | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R, | |
492 | .n_minors = 1, | |
493 | }; | |
494 | ||
8389feb4 | 495 | static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode) |
74ee1a75 | 496 | { |
6e9624b8 | 497 | int ret; |
2a48fc0a | 498 | mutex_lock(&gdrom_mutex); |
6e9624b8 | 499 | ret = cdrom_open(gd.cd_info, bdev, mode); |
2a48fc0a | 500 | mutex_unlock(&gdrom_mutex); |
6e9624b8 | 501 | return ret; |
74ee1a75 AM |
502 | } |
503 | ||
545727f3 | 504 | static int gdrom_bdops_release(struct gendisk *disk, fmode_t mode) |
74ee1a75 | 505 | { |
2a48fc0a | 506 | mutex_lock(&gdrom_mutex); |
545727f3 | 507 | cdrom_release(gd.cd_info, mode); |
2a48fc0a | 508 | mutex_unlock(&gdrom_mutex); |
545727f3 | 509 | return 0; |
74ee1a75 AM |
510 | } |
511 | ||
512 | static int gdrom_bdops_mediachanged(struct gendisk *disk) | |
513 | { | |
514 | return cdrom_media_changed(gd.cd_info); | |
515 | } | |
516 | ||
8389feb4 | 517 | static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode, |
74ee1a75 AM |
518 | unsigned cmd, unsigned long arg) |
519 | { | |
8a6cfeb6 AB |
520 | int ret; |
521 | ||
2a48fc0a | 522 | mutex_lock(&gdrom_mutex); |
8a6cfeb6 | 523 | ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg); |
2a48fc0a | 524 | mutex_unlock(&gdrom_mutex); |
8a6cfeb6 AB |
525 | |
526 | return ret; | |
74ee1a75 AM |
527 | } |
528 | ||
83d5cde4 | 529 | static const struct block_device_operations gdrom_bdops = { |
74ee1a75 | 530 | .owner = THIS_MODULE, |
8389feb4 AV |
531 | .open = gdrom_bdops_open, |
532 | .release = gdrom_bdops_release, | |
74ee1a75 | 533 | .media_changed = gdrom_bdops_mediachanged, |
8a6cfeb6 | 534 | .ioctl = gdrom_bdops_ioctl, |
74ee1a75 AM |
535 | }; |
536 | ||
537 | static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id) | |
538 | { | |
9eb79bb3 | 539 | gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
540 | if (gd.pending != 1) |
541 | return IRQ_HANDLED; | |
542 | gd.pending = 0; | |
543 | wake_up_interruptible(&command_queue); | |
544 | return IRQ_HANDLED; | |
545 | } | |
546 | ||
547 | static irqreturn_t gdrom_dma_interrupt(int irq, void *dev_id) | |
548 | { | |
9eb79bb3 | 549 | gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
550 | if (gd.transfer != 1) |
551 | return IRQ_HANDLED; | |
552 | gd.transfer = 0; | |
553 | wake_up_interruptible(&request_queue); | |
554 | return IRQ_HANDLED; | |
555 | } | |
556 | ||
557 | static int __devinit gdrom_set_interrupt_handlers(void) | |
558 | { | |
559 | int err; | |
560 | ||
561 | err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt, | |
562 | IRQF_DISABLED, "gdrom_command", &gd); | |
563 | if (err) | |
564 | return err; | |
565 | err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt, | |
566 | IRQF_DISABLED, "gdrom_dma", &gd); | |
567 | if (err) | |
568 | free_irq(HW_EVENT_GDROM_CMD, &gd); | |
569 | return err; | |
570 | } | |
571 | ||
572 | /* Implement DMA read using SPI command | |
573 | * 0 -> 0x30 | |
574 | * 1 -> mode | |
575 | * 2 -> block >> 16 | |
576 | * 3 -> block >> 8 | |
577 | * 4 -> block | |
578 | * 8 -> sectors >> 16 | |
579 | * 9 -> sectors >> 8 | |
580 | * 10 -> sectors | |
581 | */ | |
582 | static void gdrom_readdisk_dma(struct work_struct *work) | |
583 | { | |
584 | int err, block, block_cnt; | |
585 | struct packet_command *read_command; | |
586 | struct list_head *elem, *next; | |
587 | struct request *req; | |
588 | unsigned long timeout; | |
589 | ||
590 | if (list_empty(&gdrom_deferred)) | |
591 | return; | |
592 | read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
593 | if (!read_command) | |
594 | return; /* get more memory later? */ | |
595 | read_command->cmd[0] = 0x30; | |
596 | read_command->cmd[1] = 0x20; | |
597 | spin_lock(&gdrom_lock); | |
598 | list_for_each_safe(elem, next, &gdrom_deferred) { | |
599 | req = list_entry(elem, struct request, queuelist); | |
600 | spin_unlock(&gdrom_lock); | |
83096ebf TH |
601 | block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET; |
602 | block_cnt = blk_rq_sectors(req)/GD_TO_BLK; | |
9eb79bb3 PM |
603 | __raw_writel(virt_to_phys(req->buffer), GDROM_DMA_STARTADDR_REG); |
604 | __raw_writel(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG); | |
605 | __raw_writel(1, GDROM_DMA_DIRECTION_REG); | |
606 | __raw_writel(1, GDROM_DMA_ENABLE_REG); | |
74ee1a75 AM |
607 | read_command->cmd[2] = (block >> 16) & 0xFF; |
608 | read_command->cmd[3] = (block >> 8) & 0xFF; | |
609 | read_command->cmd[4] = block & 0xFF; | |
610 | read_command->cmd[8] = (block_cnt >> 16) & 0xFF; | |
611 | read_command->cmd[9] = (block_cnt >> 8) & 0xFF; | |
612 | read_command->cmd[10] = block_cnt & 0xFF; | |
613 | /* set for DMA */ | |
9eb79bb3 | 614 | __raw_writeb(1, GDROM_ERROR_REG); |
74ee1a75 | 615 | /* other registers */ |
9eb79bb3 PM |
616 | __raw_writeb(0, GDROM_SECNUM_REG); |
617 | __raw_writeb(0, GDROM_BCL_REG); | |
618 | __raw_writeb(0, GDROM_BCH_REG); | |
619 | __raw_writeb(0, GDROM_DSEL_REG); | |
620 | __raw_writeb(0, GDROM_INTSEC_REG); | |
74ee1a75 AM |
621 | /* Wait for registers to reset after any previous activity */ |
622 | timeout = jiffies + HZ / 2; | |
623 | while (gdrom_is_busy() && time_before(jiffies, timeout)) | |
624 | cpu_relax(); | |
9eb79bb3 | 625 | __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
626 | timeout = jiffies + HZ / 2; |
627 | /* Wait for packet command to finish */ | |
628 | while (gdrom_is_busy() && time_before(jiffies, timeout)) | |
629 | cpu_relax(); | |
630 | gd.pending = 1; | |
631 | gd.transfer = 1; | |
54d5102f | 632 | outsw(GDROM_DATA_REG, &read_command->cmd, 6); |
74ee1a75 AM |
633 | timeout = jiffies + HZ / 2; |
634 | /* Wait for any pending DMA to finish */ | |
9eb79bb3 | 635 | while (__raw_readb(GDROM_DMA_STATUS_REG) && |
74ee1a75 AM |
636 | time_before(jiffies, timeout)) |
637 | cpu_relax(); | |
638 | /* start transfer */ | |
9eb79bb3 | 639 | __raw_writeb(1, GDROM_DMA_STATUS_REG); |
74ee1a75 AM |
640 | wait_event_interruptible_timeout(request_queue, |
641 | gd.transfer == 0, GDROM_DEFAULT_TIMEOUT); | |
7afb3a6e | 642 | err = gd.transfer ? -EIO : 0; |
74ee1a75 AM |
643 | gd.transfer = 0; |
644 | gd.pending = 0; | |
645 | /* now seek to take the request spinlock | |
646 | * before handling ending the request */ | |
647 | spin_lock(&gdrom_lock); | |
648 | list_del_init(&req->queuelist); | |
40cbbb78 | 649 | __blk_end_request_all(req, err); |
74ee1a75 AM |
650 | } |
651 | spin_unlock(&gdrom_lock); | |
652 | kfree(read_command); | |
653 | } | |
654 | ||
74ee1a75 AM |
655 | static void gdrom_request(struct request_queue *rq) |
656 | { | |
657 | struct request *req; | |
658 | ||
9934c8c0 | 659 | while ((req = blk_fetch_request(rq)) != NULL) { |
33659ebb | 660 | if (req->cmd_type != REQ_TYPE_FS) { |
e597cd09 | 661 | printk(KERN_DEBUG "gdrom: Non-fs request ignored\n"); |
23430468 TH |
662 | __blk_end_request_all(req, -EIO); |
663 | continue; | |
74ee1a75 AM |
664 | } |
665 | if (rq_data_dir(req) != READ) { | |
e597cd09 | 666 | pr_notice("Read only device - write request ignored\n"); |
23430468 TH |
667 | __blk_end_request_all(req, -EIO); |
668 | continue; | |
74ee1a75 | 669 | } |
23430468 TH |
670 | |
671 | /* | |
672 | * Add to list of deferred work and then schedule | |
673 | * workqueue. | |
674 | */ | |
675 | list_add_tail(&req->queuelist, &gdrom_deferred); | |
676 | schedule_work(&work); | |
74ee1a75 AM |
677 | } |
678 | } | |
679 | ||
680 | /* Print string identifying GD ROM device */ | |
681 | static int __devinit gdrom_outputversion(void) | |
682 | { | |
683 | struct gdrom_id *id; | |
684 | char *model_name, *manuf_name, *firmw_ver; | |
685 | int err = -ENOMEM; | |
686 | ||
687 | /* query device ID */ | |
688 | id = kzalloc(sizeof(struct gdrom_id), GFP_KERNEL); | |
689 | if (!id) | |
690 | return err; | |
691 | gdrom_identifydevice(id); | |
692 | model_name = kstrndup(id->modname, 16, GFP_KERNEL); | |
693 | if (!model_name) | |
694 | goto free_id; | |
695 | manuf_name = kstrndup(id->mname, 16, GFP_KERNEL); | |
696 | if (!manuf_name) | |
697 | goto free_model_name; | |
698 | firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL); | |
699 | if (!firmw_ver) | |
700 | goto free_manuf_name; | |
e597cd09 | 701 | pr_info("%s from %s with firmware %s\n", |
74ee1a75 AM |
702 | model_name, manuf_name, firmw_ver); |
703 | err = 0; | |
704 | kfree(firmw_ver); | |
705 | free_manuf_name: | |
706 | kfree(manuf_name); | |
707 | free_model_name: | |
708 | kfree(model_name); | |
709 | free_id: | |
710 | kfree(id); | |
711 | return err; | |
712 | } | |
713 | ||
714 | /* set the default mode for DMA transfer */ | |
715 | static int __devinit gdrom_init_dma_mode(void) | |
716 | { | |
9eb79bb3 PM |
717 | __raw_writeb(0x13, GDROM_ERROR_REG); |
718 | __raw_writeb(0x22, GDROM_INTSEC_REG); | |
74ee1a75 AM |
719 | if (!gdrom_wait_clrbusy()) |
720 | return -EBUSY; | |
9eb79bb3 | 721 | __raw_writeb(0xEF, GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
722 | if (!gdrom_wait_busy_sleeps()) |
723 | return -EBUSY; | |
724 | /* Memory protection setting for GDROM DMA | |
725 | * Bits 31 - 16 security: 0x8843 | |
726 | * Bits 15 and 7 reserved (0) | |
727 | * Bits 14 - 8 start of transfer range in 1 MB blocks OR'ed with 0x80 | |
728 | * Bits 6 - 0 end of transfer range in 1 MB blocks OR'ed with 0x80 | |
729 | * (0x40 | 0x80) = start range at 0x0C000000 | |
730 | * (0x7F | 0x80) = end range at 0x0FFFFFFF */ | |
9eb79bb3 PM |
731 | __raw_writel(0x8843407F, GDROM_DMA_ACCESS_CTRL_REG); |
732 | __raw_writel(9, GDROM_DMA_WAIT_REG); /* DMA word setting */ | |
74ee1a75 AM |
733 | return 0; |
734 | } | |
735 | ||
736 | static void __devinit probe_gdrom_setupcd(void) | |
737 | { | |
738 | gd.cd_info->ops = &gdrom_ops; | |
739 | gd.cd_info->capacity = 1; | |
740 | strcpy(gd.cd_info->name, GDROM_DEV_NAME); | |
741 | gd.cd_info->mask = CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK| | |
742 | CDC_SELECT_DISC; | |
743 | } | |
744 | ||
745 | static void __devinit probe_gdrom_setupdisk(void) | |
746 | { | |
747 | gd.disk->major = gdrom_major; | |
748 | gd.disk->first_minor = 1; | |
749 | gd.disk->minors = 1; | |
750 | strcpy(gd.disk->disk_name, GDROM_DEV_NAME); | |
751 | } | |
752 | ||
753 | static int __devinit probe_gdrom_setupqueue(void) | |
754 | { | |
e1defc4f | 755 | blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR); |
74ee1a75 | 756 | /* using DMA so memory will need to be contiguous */ |
8a78362c | 757 | blk_queue_max_segments(gd.gdrom_rq, 1); |
74ee1a75 AM |
758 | /* set a large max size to get most from DMA */ |
759 | blk_queue_max_segment_size(gd.gdrom_rq, 0x40000); | |
760 | gd.disk->queue = gd.gdrom_rq; | |
761 | return gdrom_init_dma_mode(); | |
762 | } | |
763 | ||
764 | /* | |
765 | * register this as a block device and as compliant with the | |
766 | * universal CD Rom driver interface | |
767 | */ | |
768 | static int __devinit probe_gdrom(struct platform_device *devptr) | |
769 | { | |
770 | int err; | |
771 | /* Start the device */ | |
772 | if (gdrom_execute_diagnostic() != 1) { | |
e597cd09 | 773 | pr_warning("ATA Probe for GDROM failed\n"); |
74ee1a75 AM |
774 | return -ENODEV; |
775 | } | |
776 | /* Print out firmware ID */ | |
777 | if (gdrom_outputversion()) | |
778 | return -ENOMEM; | |
779 | /* Register GDROM */ | |
780 | gdrom_major = register_blkdev(0, GDROM_DEV_NAME); | |
781 | if (gdrom_major <= 0) | |
782 | return gdrom_major; | |
e597cd09 | 783 | pr_info("Registered with major number %d\n", |
74ee1a75 AM |
784 | gdrom_major); |
785 | /* Specify basic properties of drive */ | |
786 | gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL); | |
787 | if (!gd.cd_info) { | |
788 | err = -ENOMEM; | |
789 | goto probe_fail_no_mem; | |
790 | } | |
791 | probe_gdrom_setupcd(); | |
792 | gd.disk = alloc_disk(1); | |
793 | if (!gd.disk) { | |
794 | err = -ENODEV; | |
795 | goto probe_fail_no_disk; | |
796 | } | |
797 | probe_gdrom_setupdisk(); | |
798 | if (register_cdrom(gd.cd_info)) { | |
799 | err = -ENODEV; | |
800 | goto probe_fail_cdrom_register; | |
801 | } | |
802 | gd.disk->fops = &gdrom_bdops; | |
803 | /* latch on to the interrupt */ | |
804 | err = gdrom_set_interrupt_handlers(); | |
805 | if (err) | |
806 | goto probe_fail_cmdirq_register; | |
807 | gd.gdrom_rq = blk_init_queue(gdrom_request, &gdrom_lock); | |
808 | if (!gd.gdrom_rq) | |
809 | goto probe_fail_requestq; | |
810 | ||
811 | err = probe_gdrom_setupqueue(); | |
812 | if (err) | |
813 | goto probe_fail_toc; | |
814 | ||
815 | gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL); | |
816 | if (!gd.toc) | |
817 | goto probe_fail_toc; | |
818 | add_disk(gd.disk); | |
819 | return 0; | |
820 | ||
821 | probe_fail_toc: | |
822 | blk_cleanup_queue(gd.gdrom_rq); | |
823 | probe_fail_requestq: | |
824 | free_irq(HW_EVENT_GDROM_DMA, &gd); | |
825 | free_irq(HW_EVENT_GDROM_CMD, &gd); | |
826 | probe_fail_cmdirq_register: | |
827 | probe_fail_cdrom_register: | |
828 | del_gendisk(gd.disk); | |
829 | probe_fail_no_disk: | |
830 | kfree(gd.cd_info); | |
831 | unregister_blkdev(gdrom_major, GDROM_DEV_NAME); | |
832 | gdrom_major = 0; | |
833 | probe_fail_no_mem: | |
e597cd09 | 834 | pr_warning("Probe failed - error is 0x%X\n", err); |
74ee1a75 AM |
835 | return err; |
836 | } | |
837 | ||
838 | static int __devexit remove_gdrom(struct platform_device *devptr) | |
839 | { | |
0ead5c86 | 840 | flush_work_sync(&work); |
74ee1a75 AM |
841 | blk_cleanup_queue(gd.gdrom_rq); |
842 | free_irq(HW_EVENT_GDROM_CMD, &gd); | |
843 | free_irq(HW_EVENT_GDROM_DMA, &gd); | |
844 | del_gendisk(gd.disk); | |
845 | if (gdrom_major) | |
846 | unregister_blkdev(gdrom_major, GDROM_DEV_NAME); | |
0a0c4114 AM |
847 | unregister_cdrom(gd.cd_info); |
848 | ||
849 | return 0; | |
74ee1a75 AM |
850 | } |
851 | ||
852 | static struct platform_driver gdrom_driver = { | |
853 | .probe = probe_gdrom, | |
854 | .remove = __devexit_p(remove_gdrom), | |
855 | .driver = { | |
856 | .name = GDROM_DEV_NAME, | |
857 | }, | |
858 | }; | |
859 | ||
860 | static int __init init_gdrom(void) | |
861 | { | |
862 | int rc; | |
863 | gd.toc = NULL; | |
864 | rc = platform_driver_register(&gdrom_driver); | |
865 | if (rc) | |
866 | return rc; | |
867 | pd = platform_device_register_simple(GDROM_DEV_NAME, -1, NULL, 0); | |
868 | if (IS_ERR(pd)) { | |
869 | platform_driver_unregister(&gdrom_driver); | |
870 | return PTR_ERR(pd); | |
871 | } | |
872 | return 0; | |
873 | } | |
874 | ||
875 | static void __exit exit_gdrom(void) | |
876 | { | |
877 | platform_device_unregister(pd); | |
878 | platform_driver_unregister(&gdrom_driver); | |
879 | kfree(gd.toc); | |
880 | } | |
881 | ||
882 | module_init(init_gdrom); | |
883 | module_exit(exit_gdrom); | |
884 | MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>"); | |
885 | MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver"); | |
886 | MODULE_LICENSE("GPL"); |