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> | |
ad5fc6bb | 34 | #include <linux/blk-mq.h> |
74ee1a75 AM |
35 | #include <linux/interrupt.h> |
36 | #include <linux/device.h> | |
2a48fc0a | 37 | #include <linux/mutex.h> |
74ee1a75 | 38 | #include <linux/wait.h> |
74ee1a75 AM |
39 | #include <linux/platform_device.h> |
40 | #include <scsi/scsi.h> | |
41 | #include <asm/io.h> | |
42 | #include <asm/dma.h> | |
43 | #include <asm/delay.h> | |
0764bff4 PM |
44 | #include <mach/dma.h> |
45 | #include <mach/sysasic.h> | |
74ee1a75 AM |
46 | |
47 | #define GDROM_DEV_NAME "gdrom" | |
48 | #define GD_SESSION_OFFSET 150 | |
49 | ||
50 | /* GD Rom commands */ | |
51 | #define GDROM_COM_SOFTRESET 0x08 | |
52 | #define GDROM_COM_EXECDIAG 0x90 | |
53 | #define GDROM_COM_PACKET 0xA0 | |
54 | #define GDROM_COM_IDDEV 0xA1 | |
55 | ||
56 | /* GD Rom registers */ | |
57 | #define GDROM_BASE_REG 0xA05F7000 | |
58 | #define GDROM_ALTSTATUS_REG (GDROM_BASE_REG + 0x18) | |
59 | #define GDROM_DATA_REG (GDROM_BASE_REG + 0x80) | |
60 | #define GDROM_ERROR_REG (GDROM_BASE_REG + 0x84) | |
61 | #define GDROM_INTSEC_REG (GDROM_BASE_REG + 0x88) | |
62 | #define GDROM_SECNUM_REG (GDROM_BASE_REG + 0x8C) | |
63 | #define GDROM_BCL_REG (GDROM_BASE_REG + 0x90) | |
64 | #define GDROM_BCH_REG (GDROM_BASE_REG + 0x94) | |
65 | #define GDROM_DSEL_REG (GDROM_BASE_REG + 0x98) | |
66 | #define GDROM_STATUSCOMMAND_REG (GDROM_BASE_REG + 0x9C) | |
67 | #define GDROM_RESET_REG (GDROM_BASE_REG + 0x4E4) | |
68 | ||
69 | #define GDROM_DMA_STARTADDR_REG (GDROM_BASE_REG + 0x404) | |
70 | #define GDROM_DMA_LENGTH_REG (GDROM_BASE_REG + 0x408) | |
71 | #define GDROM_DMA_DIRECTION_REG (GDROM_BASE_REG + 0x40C) | |
72 | #define GDROM_DMA_ENABLE_REG (GDROM_BASE_REG + 0x414) | |
73 | #define GDROM_DMA_STATUS_REG (GDROM_BASE_REG + 0x418) | |
74 | #define GDROM_DMA_WAIT_REG (GDROM_BASE_REG + 0x4A0) | |
75 | #define GDROM_DMA_ACCESS_CTRL_REG (GDROM_BASE_REG + 0x4B8) | |
76 | ||
77 | #define GDROM_HARD_SECTOR 2048 | |
78 | #define BLOCK_LAYER_SECTOR 512 | |
79 | #define GD_TO_BLK 4 | |
80 | ||
81 | #define GDROM_DEFAULT_TIMEOUT (HZ * 7) | |
82 | ||
2a48fc0a | 83 | static DEFINE_MUTEX(gdrom_mutex); |
74ee1a75 AM |
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 | ||
74ee1a75 AM |
104 | struct gdromtoc { |
105 | unsigned int entry[99]; | |
106 | unsigned int first, last; | |
107 | unsigned int leadout; | |
108 | }; | |
109 | ||
110 | static struct gdrom_unit { | |
111 | struct gendisk *disk; | |
112 | struct cdrom_device_info *cd_info; | |
113 | int status; | |
114 | int pending; | |
115 | int transfer; | |
116 | char disk_type; | |
117 | struct gdromtoc *toc; | |
118 | struct request_queue *gdrom_rq; | |
ad5fc6bb | 119 | struct blk_mq_tag_set tag_set; |
74ee1a75 AM |
120 | } gd; |
121 | ||
122 | struct gdrom_id { | |
123 | char mid; | |
124 | char modid; | |
125 | char verid; | |
126 | char padA[13]; | |
127 | char mname[16]; | |
128 | char modname[16]; | |
129 | char firmver[16]; | |
130 | char padB[16]; | |
131 | }; | |
132 | ||
133 | static int gdrom_getsense(short *bufstring); | |
134 | static int gdrom_packetcommand(struct cdrom_device_info *cd_info, | |
135 | struct packet_command *command); | |
136 | static int gdrom_hardreset(struct cdrom_device_info *cd_info); | |
137 | ||
138 | static bool gdrom_is_busy(void) | |
139 | { | |
9eb79bb3 | 140 | return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) != 0; |
74ee1a75 AM |
141 | } |
142 | ||
143 | static bool gdrom_data_request(void) | |
144 | { | |
9eb79bb3 | 145 | return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x88) == 8; |
74ee1a75 AM |
146 | } |
147 | ||
148 | static bool gdrom_wait_clrbusy(void) | |
149 | { | |
150 | unsigned long timeout = jiffies + GDROM_DEFAULT_TIMEOUT; | |
9eb79bb3 | 151 | while ((__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) && |
74ee1a75 AM |
152 | (time_before(jiffies, timeout))) |
153 | cpu_relax(); | |
154 | return time_before(jiffies, timeout + 1); | |
155 | } | |
156 | ||
157 | static bool gdrom_wait_busy_sleeps(void) | |
158 | { | |
159 | unsigned long timeout; | |
160 | /* Wait to get busy first */ | |
161 | timeout = jiffies + GDROM_DEFAULT_TIMEOUT; | |
162 | while (!gdrom_is_busy() && time_before(jiffies, timeout)) | |
163 | cpu_relax(); | |
164 | /* Now wait for busy to clear */ | |
165 | return gdrom_wait_clrbusy(); | |
166 | } | |
167 | ||
168 | static void gdrom_identifydevice(void *buf) | |
169 | { | |
170 | int c; | |
171 | short *data = buf; | |
172 | /* If the device won't clear it has probably | |
173 | * been hit by a serious failure - but we'll | |
174 | * try to return a sense key even so */ | |
175 | if (!gdrom_wait_clrbusy()) { | |
176 | gdrom_getsense(NULL); | |
177 | return; | |
178 | } | |
9eb79bb3 | 179 | __raw_writeb(GDROM_COM_IDDEV, GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
180 | if (!gdrom_wait_busy_sleeps()) { |
181 | gdrom_getsense(NULL); | |
182 | return; | |
183 | } | |
184 | /* now read in the data */ | |
185 | for (c = 0; c < 40; c++) | |
9eb79bb3 | 186 | data[c] = __raw_readw(GDROM_DATA_REG); |
74ee1a75 AM |
187 | } |
188 | ||
189 | static void gdrom_spicommand(void *spi_string, int buflen) | |
190 | { | |
191 | short *cmd = spi_string; | |
192 | unsigned long timeout; | |
193 | ||
194 | /* ensure IRQ_WAIT is set */ | |
9eb79bb3 | 195 | __raw_writeb(0x08, GDROM_ALTSTATUS_REG); |
74ee1a75 | 196 | /* specify how many bytes we expect back */ |
9eb79bb3 PM |
197 | __raw_writeb(buflen & 0xFF, GDROM_BCL_REG); |
198 | __raw_writeb((buflen >> 8) & 0xFF, GDROM_BCH_REG); | |
74ee1a75 | 199 | /* other parameters */ |
9eb79bb3 PM |
200 | __raw_writeb(0, GDROM_INTSEC_REG); |
201 | __raw_writeb(0, GDROM_SECNUM_REG); | |
202 | __raw_writeb(0, GDROM_ERROR_REG); | |
74ee1a75 AM |
203 | /* Wait until we can go */ |
204 | if (!gdrom_wait_clrbusy()) { | |
205 | gdrom_getsense(NULL); | |
206 | return; | |
207 | } | |
208 | timeout = jiffies + GDROM_DEFAULT_TIMEOUT; | |
9eb79bb3 | 209 | __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
210 | while (!gdrom_data_request() && time_before(jiffies, timeout)) |
211 | cpu_relax(); | |
212 | if (!time_before(jiffies, timeout + 1)) { | |
213 | gdrom_getsense(NULL); | |
214 | return; | |
215 | } | |
54d5102f | 216 | outsw(GDROM_DATA_REG, cmd, 6); |
74ee1a75 AM |
217 | } |
218 | ||
219 | ||
220 | /* gdrom_command_executediagnostic: | |
221 | * Used to probe for presence of working GDROM | |
222 | * Restarts GDROM device and then applies standard ATA 3 | |
223 | * Execute Diagnostic Command: a return of '1' indicates device 0 | |
224 | * present and device 1 absent | |
225 | */ | |
226 | static char gdrom_execute_diagnostic(void) | |
227 | { | |
228 | gdrom_hardreset(gd.cd_info); | |
229 | if (!gdrom_wait_clrbusy()) | |
230 | return 0; | |
9eb79bb3 | 231 | __raw_writeb(GDROM_COM_EXECDIAG, GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
232 | if (!gdrom_wait_busy_sleeps()) |
233 | return 0; | |
9eb79bb3 | 234 | return __raw_readb(GDROM_ERROR_REG); |
74ee1a75 AM |
235 | } |
236 | ||
237 | /* | |
238 | * Prepare disk command | |
239 | * byte 0 = 0x70 | |
240 | * byte 1 = 0x1f | |
241 | */ | |
242 | static int gdrom_preparedisk_cmd(void) | |
243 | { | |
244 | struct packet_command *spin_command; | |
245 | spin_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
246 | if (!spin_command) | |
247 | return -ENOMEM; | |
248 | spin_command->cmd[0] = 0x70; | |
249 | spin_command->cmd[2] = 0x1f; | |
250 | spin_command->buflen = 0; | |
251 | gd.pending = 1; | |
252 | gdrom_packetcommand(gd.cd_info, spin_command); | |
253 | /* 60 second timeout */ | |
254 | wait_event_interruptible_timeout(command_queue, gd.pending == 0, | |
255 | GDROM_DEFAULT_TIMEOUT); | |
256 | gd.pending = 0; | |
257 | kfree(spin_command); | |
258 | if (gd.status & 0x01) { | |
259 | /* log an error */ | |
260 | gdrom_getsense(NULL); | |
261 | return -EIO; | |
262 | } | |
263 | return 0; | |
264 | } | |
265 | ||
266 | /* | |
267 | * Read TOC command | |
268 | * byte 0 = 0x14 | |
269 | * byte 1 = session | |
270 | * byte 3 = sizeof TOC >> 8 ie upper byte | |
271 | * byte 4 = sizeof TOC & 0xff ie lower byte | |
272 | */ | |
273 | static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session) | |
274 | { | |
275 | int tocsize; | |
276 | struct packet_command *toc_command; | |
277 | int err = 0; | |
278 | ||
279 | toc_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
280 | if (!toc_command) | |
281 | return -ENOMEM; | |
282 | tocsize = sizeof(struct gdromtoc); | |
283 | toc_command->cmd[0] = 0x14; | |
284 | toc_command->cmd[1] = session; | |
285 | toc_command->cmd[3] = tocsize >> 8; | |
286 | toc_command->cmd[4] = tocsize & 0xff; | |
287 | toc_command->buflen = tocsize; | |
288 | if (gd.pending) { | |
289 | err = -EBUSY; | |
290 | goto cleanup_readtoc_final; | |
291 | } | |
292 | gd.pending = 1; | |
293 | gdrom_packetcommand(gd.cd_info, toc_command); | |
294 | wait_event_interruptible_timeout(command_queue, gd.pending == 0, | |
295 | GDROM_DEFAULT_TIMEOUT); | |
296 | if (gd.pending) { | |
297 | err = -EINVAL; | |
298 | goto cleanup_readtoc; | |
299 | } | |
54d5102f | 300 | insw(GDROM_DATA_REG, toc, tocsize/2); |
74ee1a75 AM |
301 | if (gd.status & 0x01) |
302 | err = -EINVAL; | |
303 | ||
304 | cleanup_readtoc: | |
305 | gd.pending = 0; | |
306 | cleanup_readtoc_final: | |
307 | kfree(toc_command); | |
308 | return err; | |
309 | } | |
310 | ||
311 | /* TOC helpers */ | |
312 | static int get_entry_lba(int track) | |
313 | { | |
314 | return (cpu_to_be32(track & 0xffffff00) - GD_SESSION_OFFSET); | |
315 | } | |
316 | ||
317 | static int get_entry_q_ctrl(int track) | |
318 | { | |
319 | return (track & 0x000000f0) >> 4; | |
320 | } | |
321 | ||
322 | static int get_entry_track(int track) | |
323 | { | |
324 | return (track & 0x0000ff00) >> 8; | |
325 | } | |
326 | ||
327 | static int gdrom_get_last_session(struct cdrom_device_info *cd_info, | |
328 | struct cdrom_multisession *ms_info) | |
329 | { | |
cdffab7a | 330 | int fentry, lentry, track, data, err; |
331 | ||
74ee1a75 AM |
332 | if (!gd.toc) |
333 | return -ENOMEM; | |
cdffab7a | 334 | |
74ee1a75 AM |
335 | /* Check if GD-ROM */ |
336 | err = gdrom_readtoc_cmd(gd.toc, 1); | |
337 | /* Not a GD-ROM so check if standard CD-ROM */ | |
338 | if (err) { | |
74ee1a75 AM |
339 | err = gdrom_readtoc_cmd(gd.toc, 0); |
340 | if (err) { | |
e597cd09 | 341 | pr_info("Could not get CD table of contents\n"); |
74ee1a75 AM |
342 | return -ENXIO; |
343 | } | |
344 | } | |
345 | ||
346 | fentry = get_entry_track(gd.toc->first); | |
347 | lentry = get_entry_track(gd.toc->last); | |
348 | /* Find the first data track */ | |
349 | track = get_entry_track(gd.toc->last); | |
350 | do { | |
351 | data = gd.toc->entry[track - 1]; | |
352 | if (get_entry_q_ctrl(data)) | |
353 | break; /* ie a real data track */ | |
354 | track--; | |
355 | } while (track >= fentry); | |
356 | ||
357 | if ((track > 100) || (track < get_entry_track(gd.toc->first))) { | |
e597cd09 | 358 | pr_info("No data on the last session of the CD\n"); |
74ee1a75 AM |
359 | gdrom_getsense(NULL); |
360 | return -ENXIO; | |
361 | } | |
362 | ||
363 | ms_info->addr_format = CDROM_LBA; | |
364 | ms_info->addr.lba = get_entry_lba(data); | |
365 | ms_info->xa_flag = 1; | |
366 | return 0; | |
367 | } | |
368 | ||
369 | static int gdrom_open(struct cdrom_device_info *cd_info, int purpose) | |
370 | { | |
371 | /* spin up the disk */ | |
372 | return gdrom_preparedisk_cmd(); | |
373 | } | |
374 | ||
375 | /* this function is required even if empty */ | |
376 | static void gdrom_release(struct cdrom_device_info *cd_info) | |
377 | { | |
378 | } | |
379 | ||
380 | static int gdrom_drivestatus(struct cdrom_device_info *cd_info, int ignore) | |
381 | { | |
382 | /* read the sense key */ | |
9eb79bb3 | 383 | char sense = __raw_readb(GDROM_ERROR_REG); |
74ee1a75 AM |
384 | sense &= 0xF0; |
385 | if (sense == 0) | |
386 | return CDS_DISC_OK; | |
387 | if (sense == 0x20) | |
388 | return CDS_DRIVE_NOT_READY; | |
389 | /* default */ | |
390 | return CDS_NO_INFO; | |
391 | } | |
392 | ||
1c27030b TH |
393 | static unsigned int gdrom_check_events(struct cdrom_device_info *cd_info, |
394 | unsigned int clearing, int ignore) | |
74ee1a75 AM |
395 | { |
396 | /* check the sense key */ | |
1c27030b TH |
397 | return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60 ? |
398 | DISK_EVENT_MEDIA_CHANGE : 0; | |
74ee1a75 AM |
399 | } |
400 | ||
401 | /* reset the G1 bus */ | |
402 | static int gdrom_hardreset(struct cdrom_device_info *cd_info) | |
403 | { | |
404 | int count; | |
9eb79bb3 | 405 | __raw_writel(0x1fffff, GDROM_RESET_REG); |
74ee1a75 | 406 | for (count = 0xa0000000; count < 0xa0200000; count += 4) |
9eb79bb3 | 407 | __raw_readl(count); |
74ee1a75 AM |
408 | return 0; |
409 | } | |
410 | ||
411 | /* keep the function looking like the universal | |
412 | * CD Rom specification - returning int */ | |
413 | static int gdrom_packetcommand(struct cdrom_device_info *cd_info, | |
414 | struct packet_command *command) | |
415 | { | |
416 | gdrom_spicommand(&command->cmd, command->buflen); | |
417 | return 0; | |
418 | } | |
419 | ||
420 | /* Get Sense SPI command | |
421 | * From Marcus Comstedt | |
422 | * cmd = 0x13 | |
423 | * cmd + 4 = length of returned buffer | |
424 | * Returns 5 16 bit words | |
425 | */ | |
426 | static int gdrom_getsense(short *bufstring) | |
427 | { | |
428 | struct packet_command *sense_command; | |
429 | short sense[5]; | |
430 | int sense_key; | |
431 | int err = -EIO; | |
432 | ||
433 | sense_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); | |
434 | if (!sense_command) | |
435 | return -ENOMEM; | |
436 | sense_command->cmd[0] = 0x13; | |
437 | sense_command->cmd[4] = 10; | |
438 | sense_command->buflen = 10; | |
439 | /* even if something is pending try to get | |
440 | * the sense key if possible */ | |
441 | if (gd.pending && !gdrom_wait_clrbusy()) { | |
442 | err = -EBUSY; | |
443 | goto cleanup_sense_final; | |
444 | } | |
445 | gd.pending = 1; | |
446 | gdrom_packetcommand(gd.cd_info, sense_command); | |
447 | wait_event_interruptible_timeout(command_queue, gd.pending == 0, | |
448 | GDROM_DEFAULT_TIMEOUT); | |
449 | if (gd.pending) | |
450 | goto cleanup_sense; | |
54d5102f | 451 | insw(GDROM_DATA_REG, &sense, sense_command->buflen/2); |
74ee1a75 | 452 | if (sense[1] & 40) { |
e597cd09 | 453 | pr_info("Drive not ready - command aborted\n"); |
74ee1a75 AM |
454 | goto cleanup_sense; |
455 | } | |
456 | sense_key = sense[1] & 0x0F; | |
457 | if (sense_key < ARRAY_SIZE(sense_texts)) | |
e597cd09 | 458 | pr_info("%s\n", sense_texts[sense_key].text); |
74ee1a75 | 459 | else |
e597cd09 | 460 | pr_err("Unknown sense key: %d\n", sense_key); |
74ee1a75 AM |
461 | if (bufstring) /* return addional sense data */ |
462 | memcpy(bufstring, &sense[4], 2); | |
463 | if (sense_key < 2) | |
464 | err = 0; | |
465 | ||
466 | cleanup_sense: | |
467 | gd.pending = 0; | |
468 | cleanup_sense_final: | |
469 | kfree(sense_command); | |
470 | return err; | |
471 | } | |
472 | ||
d15cad5d BP |
473 | static int gdrom_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, |
474 | void *arg) | |
475 | { | |
476 | return -EINVAL; | |
477 | } | |
478 | ||
853fe1bf | 479 | static const struct cdrom_device_ops gdrom_ops = { |
74ee1a75 AM |
480 | .open = gdrom_open, |
481 | .release = gdrom_release, | |
482 | .drive_status = gdrom_drivestatus, | |
1c27030b | 483 | .check_events = gdrom_check_events, |
74ee1a75 AM |
484 | .get_last_session = gdrom_get_last_session, |
485 | .reset = gdrom_hardreset, | |
d15cad5d | 486 | .audio_ioctl = gdrom_audio_ioctl, |
853fe1bf | 487 | .generic_packet = cdrom_dummy_generic_packet, |
74ee1a75 AM |
488 | .capability = CDC_MULTI_SESSION | CDC_MEDIA_CHANGED | |
489 | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R, | |
74ee1a75 AM |
490 | }; |
491 | ||
8389feb4 | 492 | static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode) |
74ee1a75 | 493 | { |
6e9624b8 | 494 | int ret; |
2bbea6e1 ML |
495 | |
496 | check_disk_change(bdev); | |
497 | ||
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 | ||
db2a144b | 504 | static void 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); |
74ee1a75 AM |
509 | } |
510 | ||
1c27030b TH |
511 | static unsigned int gdrom_bdops_check_events(struct gendisk *disk, |
512 | unsigned int clearing) | |
74ee1a75 | 513 | { |
1c27030b | 514 | return cdrom_check_events(gd.cd_info, clearing); |
74ee1a75 AM |
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, | |
1c27030b | 533 | .check_events = gdrom_bdops_check_events, |
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 | ||
0fe763c5 | 557 | static int gdrom_set_interrupt_handlers(void) |
74ee1a75 AM |
558 | { |
559 | int err; | |
560 | ||
561 | err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt, | |
644ff181 | 562 | 0, "gdrom_command", &gd); |
74ee1a75 AM |
563 | if (err) |
564 | return err; | |
565 | err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt, | |
644ff181 | 566 | 0, "gdrom_dma", &gd); |
74ee1a75 AM |
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 | */ | |
ad5fc6bb | 582 | static blk_status_t gdrom_readdisk_dma(struct request *req) |
74ee1a75 | 583 | { |
2a842aca CH |
584 | int block, block_cnt; |
585 | blk_status_t err; | |
74ee1a75 | 586 | struct packet_command *read_command; |
74ee1a75 AM |
587 | unsigned long timeout; |
588 | ||
74ee1a75 AM |
589 | read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); |
590 | if (!read_command) | |
ad5fc6bb JA |
591 | return BLK_STS_RESOURCE; |
592 | ||
74ee1a75 AM |
593 | read_command->cmd[0] = 0x30; |
594 | read_command->cmd[1] = 0x20; | |
ad5fc6bb JA |
595 | block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET; |
596 | block_cnt = blk_rq_sectors(req)/GD_TO_BLK; | |
597 | __raw_writel(virt_to_phys(bio_data(req->bio)), GDROM_DMA_STARTADDR_REG); | |
598 | __raw_writel(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG); | |
599 | __raw_writel(1, GDROM_DMA_DIRECTION_REG); | |
600 | __raw_writel(1, GDROM_DMA_ENABLE_REG); | |
601 | read_command->cmd[2] = (block >> 16) & 0xFF; | |
602 | read_command->cmd[3] = (block >> 8) & 0xFF; | |
603 | read_command->cmd[4] = block & 0xFF; | |
604 | read_command->cmd[8] = (block_cnt >> 16) & 0xFF; | |
605 | read_command->cmd[9] = (block_cnt >> 8) & 0xFF; | |
606 | read_command->cmd[10] = block_cnt & 0xFF; | |
607 | /* set for DMA */ | |
608 | __raw_writeb(1, GDROM_ERROR_REG); | |
609 | /* other registers */ | |
610 | __raw_writeb(0, GDROM_SECNUM_REG); | |
611 | __raw_writeb(0, GDROM_BCL_REG); | |
612 | __raw_writeb(0, GDROM_BCH_REG); | |
613 | __raw_writeb(0, GDROM_DSEL_REG); | |
614 | __raw_writeb(0, GDROM_INTSEC_REG); | |
615 | /* Wait for registers to reset after any previous activity */ | |
616 | timeout = jiffies + HZ / 2; | |
617 | while (gdrom_is_busy() && time_before(jiffies, timeout)) | |
618 | cpu_relax(); | |
619 | __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); | |
620 | timeout = jiffies + HZ / 2; | |
621 | /* Wait for packet command to finish */ | |
622 | while (gdrom_is_busy() && time_before(jiffies, timeout)) | |
623 | cpu_relax(); | |
624 | gd.pending = 1; | |
625 | gd.transfer = 1; | |
626 | outsw(GDROM_DATA_REG, &read_command->cmd, 6); | |
627 | timeout = jiffies + HZ / 2; | |
628 | /* Wait for any pending DMA to finish */ | |
629 | while (__raw_readb(GDROM_DMA_STATUS_REG) && | |
630 | time_before(jiffies, timeout)) | |
631 | cpu_relax(); | |
632 | /* start transfer */ | |
633 | __raw_writeb(1, GDROM_DMA_STATUS_REG); | |
634 | wait_event_interruptible_timeout(request_queue, | |
635 | gd.transfer == 0, GDROM_DEFAULT_TIMEOUT); | |
636 | err = gd.transfer ? BLK_STS_IOERR : BLK_STS_OK; | |
637 | gd.transfer = 0; | |
638 | gd.pending = 0; | |
639 | ||
640 | blk_mq_end_request(req, err); | |
74ee1a75 | 641 | kfree(read_command); |
ad5fc6bb | 642 | return BLK_STS_OK; |
74ee1a75 AM |
643 | } |
644 | ||
ad5fc6bb JA |
645 | static blk_status_t gdrom_queue_rq(struct blk_mq_hw_ctx *hctx, |
646 | const struct blk_mq_queue_data *bd) | |
647 | { | |
648 | blk_mq_start_request(bd->rq); | |
649 | ||
650 | switch (req_op(bd->rq)) { | |
651 | case REQ_OP_READ: | |
652 | return gdrom_readdisk_dma(bd->rq); | |
653 | case REQ_OP_WRITE: | |
654 | pr_notice("Read only device - write request ignored\n"); | |
655 | return BLK_STS_IOERR; | |
656 | default: | |
657 | printk(KERN_DEBUG "gdrom: Non-fs request ignored\n"); | |
658 | return BLK_STS_IOERR; | |
74ee1a75 AM |
659 | } |
660 | } | |
661 | ||
662 | /* Print string identifying GD ROM device */ | |
0fe763c5 | 663 | static int gdrom_outputversion(void) |
74ee1a75 AM |
664 | { |
665 | struct gdrom_id *id; | |
666 | char *model_name, *manuf_name, *firmw_ver; | |
667 | int err = -ENOMEM; | |
668 | ||
669 | /* query device ID */ | |
670 | id = kzalloc(sizeof(struct gdrom_id), GFP_KERNEL); | |
671 | if (!id) | |
672 | return err; | |
673 | gdrom_identifydevice(id); | |
674 | model_name = kstrndup(id->modname, 16, GFP_KERNEL); | |
675 | if (!model_name) | |
676 | goto free_id; | |
677 | manuf_name = kstrndup(id->mname, 16, GFP_KERNEL); | |
678 | if (!manuf_name) | |
679 | goto free_model_name; | |
680 | firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL); | |
681 | if (!firmw_ver) | |
682 | goto free_manuf_name; | |
e597cd09 | 683 | pr_info("%s from %s with firmware %s\n", |
74ee1a75 AM |
684 | model_name, manuf_name, firmw_ver); |
685 | err = 0; | |
686 | kfree(firmw_ver); | |
687 | free_manuf_name: | |
688 | kfree(manuf_name); | |
689 | free_model_name: | |
690 | kfree(model_name); | |
691 | free_id: | |
692 | kfree(id); | |
693 | return err; | |
694 | } | |
695 | ||
696 | /* set the default mode for DMA transfer */ | |
0fe763c5 | 697 | static int gdrom_init_dma_mode(void) |
74ee1a75 | 698 | { |
9eb79bb3 PM |
699 | __raw_writeb(0x13, GDROM_ERROR_REG); |
700 | __raw_writeb(0x22, GDROM_INTSEC_REG); | |
74ee1a75 AM |
701 | if (!gdrom_wait_clrbusy()) |
702 | return -EBUSY; | |
9eb79bb3 | 703 | __raw_writeb(0xEF, GDROM_STATUSCOMMAND_REG); |
74ee1a75 AM |
704 | if (!gdrom_wait_busy_sleeps()) |
705 | return -EBUSY; | |
706 | /* Memory protection setting for GDROM DMA | |
707 | * Bits 31 - 16 security: 0x8843 | |
708 | * Bits 15 and 7 reserved (0) | |
709 | * Bits 14 - 8 start of transfer range in 1 MB blocks OR'ed with 0x80 | |
710 | * Bits 6 - 0 end of transfer range in 1 MB blocks OR'ed with 0x80 | |
711 | * (0x40 | 0x80) = start range at 0x0C000000 | |
712 | * (0x7F | 0x80) = end range at 0x0FFFFFFF */ | |
9eb79bb3 PM |
713 | __raw_writel(0x8843407F, GDROM_DMA_ACCESS_CTRL_REG); |
714 | __raw_writel(9, GDROM_DMA_WAIT_REG); /* DMA word setting */ | |
74ee1a75 AM |
715 | return 0; |
716 | } | |
717 | ||
0fe763c5 | 718 | static void probe_gdrom_setupcd(void) |
74ee1a75 AM |
719 | { |
720 | gd.cd_info->ops = &gdrom_ops; | |
721 | gd.cd_info->capacity = 1; | |
722 | strcpy(gd.cd_info->name, GDROM_DEV_NAME); | |
723 | gd.cd_info->mask = CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK| | |
724 | CDC_SELECT_DISC; | |
725 | } | |
726 | ||
0fe763c5 | 727 | static void probe_gdrom_setupdisk(void) |
74ee1a75 AM |
728 | { |
729 | gd.disk->major = gdrom_major; | |
730 | gd.disk->first_minor = 1; | |
731 | gd.disk->minors = 1; | |
732 | strcpy(gd.disk->disk_name, GDROM_DEV_NAME); | |
733 | } | |
734 | ||
0fe763c5 | 735 | static int probe_gdrom_setupqueue(void) |
74ee1a75 | 736 | { |
e1defc4f | 737 | blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR); |
74ee1a75 | 738 | /* using DMA so memory will need to be contiguous */ |
8a78362c | 739 | blk_queue_max_segments(gd.gdrom_rq, 1); |
74ee1a75 AM |
740 | /* set a large max size to get most from DMA */ |
741 | blk_queue_max_segment_size(gd.gdrom_rq, 0x40000); | |
742 | gd.disk->queue = gd.gdrom_rq; | |
743 | return gdrom_init_dma_mode(); | |
744 | } | |
745 | ||
ad5fc6bb JA |
746 | static const struct blk_mq_ops gdrom_mq_ops = { |
747 | .queue_rq = gdrom_queue_rq, | |
748 | }; | |
749 | ||
74ee1a75 AM |
750 | /* |
751 | * register this as a block device and as compliant with the | |
752 | * universal CD Rom driver interface | |
753 | */ | |
0fe763c5 | 754 | static int probe_gdrom(struct platform_device *devptr) |
74ee1a75 AM |
755 | { |
756 | int err; | |
757 | /* Start the device */ | |
758 | if (gdrom_execute_diagnostic() != 1) { | |
e597cd09 | 759 | pr_warning("ATA Probe for GDROM failed\n"); |
74ee1a75 AM |
760 | return -ENODEV; |
761 | } | |
762 | /* Print out firmware ID */ | |
763 | if (gdrom_outputversion()) | |
764 | return -ENOMEM; | |
765 | /* Register GDROM */ | |
766 | gdrom_major = register_blkdev(0, GDROM_DEV_NAME); | |
767 | if (gdrom_major <= 0) | |
768 | return gdrom_major; | |
e597cd09 | 769 | pr_info("Registered with major number %d\n", |
74ee1a75 AM |
770 | gdrom_major); |
771 | /* Specify basic properties of drive */ | |
772 | gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL); | |
773 | if (!gd.cd_info) { | |
774 | err = -ENOMEM; | |
775 | goto probe_fail_no_mem; | |
776 | } | |
777 | probe_gdrom_setupcd(); | |
778 | gd.disk = alloc_disk(1); | |
779 | if (!gd.disk) { | |
780 | err = -ENODEV; | |
781 | goto probe_fail_no_disk; | |
782 | } | |
783 | probe_gdrom_setupdisk(); | |
784 | if (register_cdrom(gd.cd_info)) { | |
785 | err = -ENODEV; | |
786 | goto probe_fail_cdrom_register; | |
787 | } | |
788 | gd.disk->fops = &gdrom_bdops; | |
789 | /* latch on to the interrupt */ | |
790 | err = gdrom_set_interrupt_handlers(); | |
791 | if (err) | |
792 | goto probe_fail_cmdirq_register; | |
ad5fc6bb JA |
793 | |
794 | gd.gdrom_rq = blk_mq_init_sq_queue(&gd.tag_set, &gdrom_mq_ops, 1, | |
795 | BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING); | |
796 | if (IS_ERR(gd.gdrom_rq)) { | |
0a40a935 | 797 | err = PTR_ERR(gd.gdrom_rq); |
ad5fc6bb | 798 | gd.gdrom_rq = NULL; |
74ee1a75 | 799 | goto probe_fail_requestq; |
605cdf08 | 800 | } |
ad5fc6bb | 801 | |
8fc45044 | 802 | blk_queue_bounce_limit(gd.gdrom_rq, BLK_BOUNCE_HIGH); |
74ee1a75 AM |
803 | |
804 | err = probe_gdrom_setupqueue(); | |
805 | if (err) | |
806 | goto probe_fail_toc; | |
807 | ||
808 | gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL); | |
605cdf08 CJ |
809 | if (!gd.toc) { |
810 | err = -ENOMEM; | |
74ee1a75 | 811 | goto probe_fail_toc; |
605cdf08 | 812 | } |
74ee1a75 AM |
813 | add_disk(gd.disk); |
814 | return 0; | |
815 | ||
816 | probe_fail_toc: | |
817 | blk_cleanup_queue(gd.gdrom_rq); | |
ad5fc6bb | 818 | blk_mq_free_tag_set(&gd.tag_set); |
74ee1a75 AM |
819 | probe_fail_requestq: |
820 | free_irq(HW_EVENT_GDROM_DMA, &gd); | |
821 | free_irq(HW_EVENT_GDROM_CMD, &gd); | |
822 | probe_fail_cmdirq_register: | |
823 | probe_fail_cdrom_register: | |
824 | del_gendisk(gd.disk); | |
825 | probe_fail_no_disk: | |
826 | kfree(gd.cd_info); | |
31bd8fbb | 827 | probe_fail_no_mem: |
74ee1a75 AM |
828 | unregister_blkdev(gdrom_major, GDROM_DEV_NAME); |
829 | gdrom_major = 0; | |
e597cd09 | 830 | pr_warning("Probe failed - error is 0x%X\n", err); |
74ee1a75 AM |
831 | return err; |
832 | } | |
833 | ||
0fe763c5 | 834 | static int remove_gdrom(struct platform_device *devptr) |
74ee1a75 | 835 | { |
74ee1a75 | 836 | blk_cleanup_queue(gd.gdrom_rq); |
ad5fc6bb | 837 | blk_mq_free_tag_set(&gd.tag_set); |
74ee1a75 AM |
838 | free_irq(HW_EVENT_GDROM_CMD, &gd); |
839 | free_irq(HW_EVENT_GDROM_DMA, &gd); | |
840 | del_gendisk(gd.disk); | |
841 | if (gdrom_major) | |
842 | unregister_blkdev(gdrom_major, GDROM_DEV_NAME); | |
0a0c4114 AM |
843 | unregister_cdrom(gd.cd_info); |
844 | ||
845 | return 0; | |
74ee1a75 AM |
846 | } |
847 | ||
848 | static struct platform_driver gdrom_driver = { | |
849 | .probe = probe_gdrom, | |
0fe763c5 | 850 | .remove = remove_gdrom, |
74ee1a75 AM |
851 | .driver = { |
852 | .name = GDROM_DEV_NAME, | |
853 | }, | |
854 | }; | |
855 | ||
856 | static int __init init_gdrom(void) | |
857 | { | |
858 | int rc; | |
859 | gd.toc = NULL; | |
860 | rc = platform_driver_register(&gdrom_driver); | |
861 | if (rc) | |
862 | return rc; | |
863 | pd = platform_device_register_simple(GDROM_DEV_NAME, -1, NULL, 0); | |
864 | if (IS_ERR(pd)) { | |
865 | platform_driver_unregister(&gdrom_driver); | |
866 | return PTR_ERR(pd); | |
867 | } | |
868 | return 0; | |
869 | } | |
870 | ||
871 | static void __exit exit_gdrom(void) | |
872 | { | |
873 | platform_device_unregister(pd); | |
874 | platform_driver_unregister(&gdrom_driver); | |
875 | kfree(gd.toc); | |
093c4821 | 876 | kfree(gd.cd_info); |
74ee1a75 AM |
877 | } |
878 | ||
879 | module_init(init_gdrom); | |
880 | module_exit(exit_gdrom); | |
881 | MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>"); | |
882 | MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver"); | |
883 | MODULE_LICENSE("GPL"); |