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7
8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10#include <linux/init.h>
11#include <linux/module.h>
12#include <linux/fs.h>
13#include <linux/kernel.h>
14#include <linux/list.h>
15#include <linux/slab.h>
16#include <linux/dma-mapping.h>
17#include <linux/cdrom.h>
18#include <linux/bio.h>
19#include <linux/blk-mq.h>
20#include <linux/interrupt.h>
21#include <linux/device.h>
22#include <linux/mutex.h>
23#include <linux/wait.h>
24#include <linux/platform_device.h>
25#include <scsi/scsi.h>
26#include <asm/io.h>
27#include <asm/dma.h>
28#include <asm/delay.h>
29#include <mach/dma.h>
30#include <mach/sysasic.h>
31
32#define GDROM_DEV_NAME "gdrom"
33#define GD_SESSION_OFFSET 150
34
35
36#define GDROM_COM_SOFTRESET 0x08
37#define GDROM_COM_EXECDIAG 0x90
38#define GDROM_COM_PACKET 0xA0
39#define GDROM_COM_IDDEV 0xA1
40
41
42#define GDROM_BASE_REG 0xA05F7000
43#define GDROM_ALTSTATUS_REG (GDROM_BASE_REG + 0x18)
44#define GDROM_DATA_REG (GDROM_BASE_REG + 0x80)
45#define GDROM_ERROR_REG (GDROM_BASE_REG + 0x84)
46#define GDROM_INTSEC_REG (GDROM_BASE_REG + 0x88)
47#define GDROM_SECNUM_REG (GDROM_BASE_REG + 0x8C)
48#define GDROM_BCL_REG (GDROM_BASE_REG + 0x90)
49#define GDROM_BCH_REG (GDROM_BASE_REG + 0x94)
50#define GDROM_DSEL_REG (GDROM_BASE_REG + 0x98)
51#define GDROM_STATUSCOMMAND_REG (GDROM_BASE_REG + 0x9C)
52#define GDROM_RESET_REG (GDROM_BASE_REG + 0x4E4)
53
54#define GDROM_DMA_STARTADDR_REG (GDROM_BASE_REG + 0x404)
55#define GDROM_DMA_LENGTH_REG (GDROM_BASE_REG + 0x408)
56#define GDROM_DMA_DIRECTION_REG (GDROM_BASE_REG + 0x40C)
57#define GDROM_DMA_ENABLE_REG (GDROM_BASE_REG + 0x414)
58#define GDROM_DMA_STATUS_REG (GDROM_BASE_REG + 0x418)
59#define GDROM_DMA_WAIT_REG (GDROM_BASE_REG + 0x4A0)
60#define GDROM_DMA_ACCESS_CTRL_REG (GDROM_BASE_REG + 0x4B8)
61
62#define GDROM_HARD_SECTOR 2048
63#define BLOCK_LAYER_SECTOR 512
64#define GD_TO_BLK 4
65
66#define GDROM_DEFAULT_TIMEOUT (HZ * 7)
67
68static DEFINE_MUTEX(gdrom_mutex);
69static const struct {
70 int sense_key;
71 const char * const text;
72} sense_texts[] = {
73 {NO_SENSE, "OK"},
74 {RECOVERED_ERROR, "Recovered from error"},
75 {NOT_READY, "Device not ready"},
76 {MEDIUM_ERROR, "Disk not ready"},
77 {HARDWARE_ERROR, "Hardware error"},
78 {ILLEGAL_REQUEST, "Command has failed"},
79 {UNIT_ATTENTION, "Device needs attention - disk may have been changed"},
80 {DATA_PROTECT, "Data protection error"},
81 {ABORTED_COMMAND, "Command aborted"},
82};
83
84static struct platform_device *pd;
85static int gdrom_major;
86static DECLARE_WAIT_QUEUE_HEAD(command_queue);
87static DECLARE_WAIT_QUEUE_HEAD(request_queue);
88
89struct gdromtoc {
90 unsigned int entry[99];
91 unsigned int first, last;
92 unsigned int leadout;
93};
94
95static struct gdrom_unit {
96 struct gendisk *disk;
97 struct cdrom_device_info *cd_info;
98 int status;
99 int pending;
100 int transfer;
101 char disk_type;
102 struct gdromtoc *toc;
103 struct request_queue *gdrom_rq;
104 struct blk_mq_tag_set tag_set;
105} gd;
106
107struct gdrom_id {
108 char mid;
109 char modid;
110 char verid;
111 char padA[13];
112 char mname[16];
113 char modname[16];
114 char firmver[16];
115 char padB[16];
116};
117
118static int gdrom_getsense(short *bufstring);
119static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
120 struct packet_command *command);
121static int gdrom_hardreset(struct cdrom_device_info *cd_info);
122
123static bool gdrom_is_busy(void)
124{
125 return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) != 0;
126}
127
128static bool gdrom_data_request(void)
129{
130 return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x88) == 8;
131}
132
133static bool gdrom_wait_clrbusy(void)
134{
135 unsigned long timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
136 while ((__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) &&
137 (time_before(jiffies, timeout)))
138 cpu_relax();
139 return time_before(jiffies, timeout + 1);
140}
141
142static bool gdrom_wait_busy_sleeps(void)
143{
144 unsigned long timeout;
145
146 timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
147 while (!gdrom_is_busy() && time_before(jiffies, timeout))
148 cpu_relax();
149
150 return gdrom_wait_clrbusy();
151}
152
153static void gdrom_identifydevice(void *buf)
154{
155 int c;
156 short *data = buf;
157
158
159
160 if (!gdrom_wait_clrbusy()) {
161 gdrom_getsense(NULL);
162 return;
163 }
164 __raw_writeb(GDROM_COM_IDDEV, GDROM_STATUSCOMMAND_REG);
165 if (!gdrom_wait_busy_sleeps()) {
166 gdrom_getsense(NULL);
167 return;
168 }
169
170 for (c = 0; c < 40; c++)
171 data[c] = __raw_readw(GDROM_DATA_REG);
172}
173
174static void gdrom_spicommand(void *spi_string, int buflen)
175{
176 short *cmd = spi_string;
177 unsigned long timeout;
178
179
180 __raw_writeb(0x08, GDROM_ALTSTATUS_REG);
181
182 __raw_writeb(buflen & 0xFF, GDROM_BCL_REG);
183 __raw_writeb((buflen >> 8) & 0xFF, GDROM_BCH_REG);
184
185 __raw_writeb(0, GDROM_INTSEC_REG);
186 __raw_writeb(0, GDROM_SECNUM_REG);
187 __raw_writeb(0, GDROM_ERROR_REG);
188
189 if (!gdrom_wait_clrbusy()) {
190 gdrom_getsense(NULL);
191 return;
192 }
193 timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
194 __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
195 while (!gdrom_data_request() && time_before(jiffies, timeout))
196 cpu_relax();
197 if (!time_before(jiffies, timeout + 1)) {
198 gdrom_getsense(NULL);
199 return;
200 }
201 outsw(GDROM_DATA_REG, cmd, 6);
202}
203
204
205
206
207
208
209
210
211static char gdrom_execute_diagnostic(void)
212{
213 gdrom_hardreset(gd.cd_info);
214 if (!gdrom_wait_clrbusy())
215 return 0;
216 __raw_writeb(GDROM_COM_EXECDIAG, GDROM_STATUSCOMMAND_REG);
217 if (!gdrom_wait_busy_sleeps())
218 return 0;
219 return __raw_readb(GDROM_ERROR_REG);
220}
221
222
223
224
225
226
227static int gdrom_preparedisk_cmd(void)
228{
229 struct packet_command *spin_command;
230 spin_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
231 if (!spin_command)
232 return -ENOMEM;
233 spin_command->cmd[0] = 0x70;
234 spin_command->cmd[2] = 0x1f;
235 spin_command->buflen = 0;
236 gd.pending = 1;
237 gdrom_packetcommand(gd.cd_info, spin_command);
238
239 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
240 GDROM_DEFAULT_TIMEOUT);
241 gd.pending = 0;
242 kfree(spin_command);
243 if (gd.status & 0x01) {
244
245 gdrom_getsense(NULL);
246 return -EIO;
247 }
248 return 0;
249}
250
251
252
253
254
255
256
257
258static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session)
259{
260 int tocsize;
261 struct packet_command *toc_command;
262 int err = 0;
263
264 toc_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
265 if (!toc_command)
266 return -ENOMEM;
267 tocsize = sizeof(struct gdromtoc);
268 toc_command->cmd[0] = 0x14;
269 toc_command->cmd[1] = session;
270 toc_command->cmd[3] = tocsize >> 8;
271 toc_command->cmd[4] = tocsize & 0xff;
272 toc_command->buflen = tocsize;
273 if (gd.pending) {
274 err = -EBUSY;
275 goto cleanup_readtoc_final;
276 }
277 gd.pending = 1;
278 gdrom_packetcommand(gd.cd_info, toc_command);
279 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
280 GDROM_DEFAULT_TIMEOUT);
281 if (gd.pending) {
282 err = -EINVAL;
283 goto cleanup_readtoc;
284 }
285 insw(GDROM_DATA_REG, toc, tocsize/2);
286 if (gd.status & 0x01)
287 err = -EINVAL;
288
289cleanup_readtoc:
290 gd.pending = 0;
291cleanup_readtoc_final:
292 kfree(toc_command);
293 return err;
294}
295
296
297static int get_entry_lba(int track)
298{
299 return (cpu_to_be32(track & 0xffffff00) - GD_SESSION_OFFSET);
300}
301
302static int get_entry_q_ctrl(int track)
303{
304 return (track & 0x000000f0) >> 4;
305}
306
307static int get_entry_track(int track)
308{
309 return (track & 0x0000ff00) >> 8;
310}
311
312static int gdrom_get_last_session(struct cdrom_device_info *cd_info,
313 struct cdrom_multisession *ms_info)
314{
315 int fentry, lentry, track, data, err;
316
317 if (!gd.toc)
318 return -ENOMEM;
319
320
321 err = gdrom_readtoc_cmd(gd.toc, 1);
322
323 if (err) {
324 err = gdrom_readtoc_cmd(gd.toc, 0);
325 if (err) {
326 pr_info("Could not get CD table of contents\n");
327 return -ENXIO;
328 }
329 }
330
331 fentry = get_entry_track(gd.toc->first);
332 lentry = get_entry_track(gd.toc->last);
333
334 track = get_entry_track(gd.toc->last);
335 do {
336 data = gd.toc->entry[track - 1];
337 if (get_entry_q_ctrl(data))
338 break;
339 track--;
340 } while (track >= fentry);
341
342 if ((track > 100) || (track < get_entry_track(gd.toc->first))) {
343 pr_info("No data on the last session of the CD\n");
344 gdrom_getsense(NULL);
345 return -ENXIO;
346 }
347
348 ms_info->addr_format = CDROM_LBA;
349 ms_info->addr.lba = get_entry_lba(data);
350 ms_info->xa_flag = 1;
351 return 0;
352}
353
354static int gdrom_open(struct cdrom_device_info *cd_info, int purpose)
355{
356
357 return gdrom_preparedisk_cmd();
358}
359
360
361static void gdrom_release(struct cdrom_device_info *cd_info)
362{
363}
364
365static int gdrom_drivestatus(struct cdrom_device_info *cd_info, int ignore)
366{
367
368 char sense = __raw_readb(GDROM_ERROR_REG);
369 sense &= 0xF0;
370 if (sense == 0)
371 return CDS_DISC_OK;
372 if (sense == 0x20)
373 return CDS_DRIVE_NOT_READY;
374
375 return CDS_NO_INFO;
376}
377
378static unsigned int gdrom_check_events(struct cdrom_device_info *cd_info,
379 unsigned int clearing, int ignore)
380{
381
382 return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60 ?
383 DISK_EVENT_MEDIA_CHANGE : 0;
384}
385
386
387static int gdrom_hardreset(struct cdrom_device_info *cd_info)
388{
389 int count;
390 __raw_writel(0x1fffff, GDROM_RESET_REG);
391 for (count = 0xa0000000; count < 0xa0200000; count += 4)
392 __raw_readl(count);
393 return 0;
394}
395
396
397
398static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
399 struct packet_command *command)
400{
401 gdrom_spicommand(&command->cmd, command->buflen);
402 return 0;
403}
404
405
406
407
408
409
410
411static int gdrom_getsense(short *bufstring)
412{
413 struct packet_command *sense_command;
414 short sense[5];
415 int sense_key;
416 int err = -EIO;
417
418 sense_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
419 if (!sense_command)
420 return -ENOMEM;
421 sense_command->cmd[0] = 0x13;
422 sense_command->cmd[4] = 10;
423 sense_command->buflen = 10;
424
425
426 if (gd.pending && !gdrom_wait_clrbusy()) {
427 err = -EBUSY;
428 goto cleanup_sense_final;
429 }
430 gd.pending = 1;
431 gdrom_packetcommand(gd.cd_info, sense_command);
432 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
433 GDROM_DEFAULT_TIMEOUT);
434 if (gd.pending)
435 goto cleanup_sense;
436 insw(GDROM_DATA_REG, &sense, sense_command->buflen/2);
437 if (sense[1] & 40) {
438 pr_info("Drive not ready - command aborted\n");
439 goto cleanup_sense;
440 }
441 sense_key = sense[1] & 0x0F;
442 if (sense_key < ARRAY_SIZE(sense_texts))
443 pr_info("%s\n", sense_texts[sense_key].text);
444 else
445 pr_err("Unknown sense key: %d\n", sense_key);
446 if (bufstring)
447 memcpy(bufstring, &sense[4], 2);
448 if (sense_key < 2)
449 err = 0;
450
451cleanup_sense:
452 gd.pending = 0;
453cleanup_sense_final:
454 kfree(sense_command);
455 return err;
456}
457
458static int gdrom_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
459 void *arg)
460{
461 return -EINVAL;
462}
463
464static const struct cdrom_device_ops gdrom_ops = {
465 .open = gdrom_open,
466 .release = gdrom_release,
467 .drive_status = gdrom_drivestatus,
468 .check_events = gdrom_check_events,
469 .get_last_session = gdrom_get_last_session,
470 .reset = gdrom_hardreset,
471 .audio_ioctl = gdrom_audio_ioctl,
472 .generic_packet = cdrom_dummy_generic_packet,
473 .capability = CDC_MULTI_SESSION | CDC_MEDIA_CHANGED |
474 CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R,
475};
476
477static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
478{
479 int ret;
480
481 bdev_check_media_change(bdev);
482
483 mutex_lock(&gdrom_mutex);
484 ret = cdrom_open(gd.cd_info, bdev, mode);
485 mutex_unlock(&gdrom_mutex);
486 return ret;
487}
488
489static void gdrom_bdops_release(struct gendisk *disk, fmode_t mode)
490{
491 mutex_lock(&gdrom_mutex);
492 cdrom_release(gd.cd_info, mode);
493 mutex_unlock(&gdrom_mutex);
494}
495
496static unsigned int gdrom_bdops_check_events(struct gendisk *disk,
497 unsigned int clearing)
498{
499 return cdrom_check_events(gd.cd_info, clearing);
500}
501
502static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
503 unsigned cmd, unsigned long arg)
504{
505 int ret;
506
507 mutex_lock(&gdrom_mutex);
508 ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg);
509 mutex_unlock(&gdrom_mutex);
510
511 return ret;
512}
513
514static const struct block_device_operations gdrom_bdops = {
515 .owner = THIS_MODULE,
516 .open = gdrom_bdops_open,
517 .release = gdrom_bdops_release,
518 .check_events = gdrom_bdops_check_events,
519 .ioctl = gdrom_bdops_ioctl,
520#ifdef CONFIG_COMPAT
521 .compat_ioctl = blkdev_compat_ptr_ioctl,
522#endif
523};
524
525static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id)
526{
527 gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG);
528 if (gd.pending != 1)
529 return IRQ_HANDLED;
530 gd.pending = 0;
531 wake_up_interruptible(&command_queue);
532 return IRQ_HANDLED;
533}
534
535static irqreturn_t gdrom_dma_interrupt(int irq, void *dev_id)
536{
537 gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG);
538 if (gd.transfer != 1)
539 return IRQ_HANDLED;
540 gd.transfer = 0;
541 wake_up_interruptible(&request_queue);
542 return IRQ_HANDLED;
543}
544
545static int gdrom_set_interrupt_handlers(void)
546{
547 int err;
548
549 err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt,
550 0, "gdrom_command", &gd);
551 if (err)
552 return err;
553 err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt,
554 0, "gdrom_dma", &gd);
555 if (err)
556 free_irq(HW_EVENT_GDROM_CMD, &gd);
557 return err;
558}
559
560
561
562
563
564
565
566
567
568
569
570static blk_status_t gdrom_readdisk_dma(struct request *req)
571{
572 int block, block_cnt;
573 blk_status_t err;
574 struct packet_command *read_command;
575 unsigned long timeout;
576
577 read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
578 if (!read_command)
579 return BLK_STS_RESOURCE;
580
581 read_command->cmd[0] = 0x30;
582 read_command->cmd[1] = 0x20;
583 block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET;
584 block_cnt = blk_rq_sectors(req)/GD_TO_BLK;
585 __raw_writel(page_to_phys(bio_page(req->bio)) + bio_offset(req->bio),
586 GDROM_DMA_STARTADDR_REG);
587 __raw_writel(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG);
588 __raw_writel(1, GDROM_DMA_DIRECTION_REG);
589 __raw_writel(1, GDROM_DMA_ENABLE_REG);
590 read_command->cmd[2] = (block >> 16) & 0xFF;
591 read_command->cmd[3] = (block >> 8) & 0xFF;
592 read_command->cmd[4] = block & 0xFF;
593 read_command->cmd[8] = (block_cnt >> 16) & 0xFF;
594 read_command->cmd[9] = (block_cnt >> 8) & 0xFF;
595 read_command->cmd[10] = block_cnt & 0xFF;
596
597 __raw_writeb(1, GDROM_ERROR_REG);
598
599 __raw_writeb(0, GDROM_SECNUM_REG);
600 __raw_writeb(0, GDROM_BCL_REG);
601 __raw_writeb(0, GDROM_BCH_REG);
602 __raw_writeb(0, GDROM_DSEL_REG);
603 __raw_writeb(0, GDROM_INTSEC_REG);
604
605 timeout = jiffies + HZ / 2;
606 while (gdrom_is_busy() && time_before(jiffies, timeout))
607 cpu_relax();
608 __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
609 timeout = jiffies + HZ / 2;
610
611 while (gdrom_is_busy() && time_before(jiffies, timeout))
612 cpu_relax();
613 gd.pending = 1;
614 gd.transfer = 1;
615 outsw(GDROM_DATA_REG, &read_command->cmd, 6);
616 timeout = jiffies + HZ / 2;
617
618 while (__raw_readb(GDROM_DMA_STATUS_REG) &&
619 time_before(jiffies, timeout))
620 cpu_relax();
621
622 __raw_writeb(1, GDROM_DMA_STATUS_REG);
623 wait_event_interruptible_timeout(request_queue,
624 gd.transfer == 0, GDROM_DEFAULT_TIMEOUT);
625 err = gd.transfer ? BLK_STS_IOERR : BLK_STS_OK;
626 gd.transfer = 0;
627 gd.pending = 0;
628
629 blk_mq_end_request(req, err);
630 kfree(read_command);
631 return BLK_STS_OK;
632}
633
634static blk_status_t gdrom_queue_rq(struct blk_mq_hw_ctx *hctx,
635 const struct blk_mq_queue_data *bd)
636{
637 blk_mq_start_request(bd->rq);
638
639 switch (req_op(bd->rq)) {
640 case REQ_OP_READ:
641 return gdrom_readdisk_dma(bd->rq);
642 case REQ_OP_WRITE:
643 pr_notice("Read only device - write request ignored\n");
644 return BLK_STS_IOERR;
645 default:
646 printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");
647 return BLK_STS_IOERR;
648 }
649}
650
651
652static int gdrom_outputversion(void)
653{
654 struct gdrom_id *id;
655 char *model_name, *manuf_name, *firmw_ver;
656 int err = -ENOMEM;
657
658
659 id = kzalloc(sizeof(struct gdrom_id), GFP_KERNEL);
660 if (!id)
661 return err;
662 gdrom_identifydevice(id);
663 model_name = kstrndup(id->modname, 16, GFP_KERNEL);
664 if (!model_name)
665 goto free_id;
666 manuf_name = kstrndup(id->mname, 16, GFP_KERNEL);
667 if (!manuf_name)
668 goto free_model_name;
669 firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL);
670 if (!firmw_ver)
671 goto free_manuf_name;
672 pr_info("%s from %s with firmware %s\n",
673 model_name, manuf_name, firmw_ver);
674 err = 0;
675 kfree(firmw_ver);
676free_manuf_name:
677 kfree(manuf_name);
678free_model_name:
679 kfree(model_name);
680free_id:
681 kfree(id);
682 return err;
683}
684
685
686static int gdrom_init_dma_mode(void)
687{
688 __raw_writeb(0x13, GDROM_ERROR_REG);
689 __raw_writeb(0x22, GDROM_INTSEC_REG);
690 if (!gdrom_wait_clrbusy())
691 return -EBUSY;
692 __raw_writeb(0xEF, GDROM_STATUSCOMMAND_REG);
693 if (!gdrom_wait_busy_sleeps())
694 return -EBUSY;
695
696
697
698
699
700
701
702 __raw_writel(0x8843407F, GDROM_DMA_ACCESS_CTRL_REG);
703 __raw_writel(9, GDROM_DMA_WAIT_REG);
704 return 0;
705}
706
707static void probe_gdrom_setupcd(void)
708{
709 gd.cd_info->ops = &gdrom_ops;
710 gd.cd_info->capacity = 1;
711 strcpy(gd.cd_info->name, GDROM_DEV_NAME);
712 gd.cd_info->mask = CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|
713 CDC_SELECT_DISC;
714}
715
716static void probe_gdrom_setupdisk(void)
717{
718 gd.disk->major = gdrom_major;
719 gd.disk->first_minor = 1;
720 gd.disk->minors = 1;
721 gd.disk->flags |= GENHD_FL_NO_PART;
722 strcpy(gd.disk->disk_name, GDROM_DEV_NAME);
723}
724
725static int probe_gdrom_setupqueue(void)
726{
727 blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR);
728
729 blk_queue_max_segments(gd.gdrom_rq, 1);
730
731 blk_queue_max_segment_size(gd.gdrom_rq, 0x40000);
732 gd.disk->queue = gd.gdrom_rq;
733 return gdrom_init_dma_mode();
734}
735
736static const struct blk_mq_ops gdrom_mq_ops = {
737 .queue_rq = gdrom_queue_rq,
738};
739
740
741
742
743
744static int probe_gdrom(struct platform_device *devptr)
745{
746 int err;
747
748
749
750
751
752 memset(&gd, 0, sizeof(gd));
753
754
755 if (gdrom_execute_diagnostic() != 1) {
756 pr_warn("ATA Probe for GDROM failed\n");
757 return -ENODEV;
758 }
759
760 if (gdrom_outputversion())
761 return -ENOMEM;
762
763 gdrom_major = register_blkdev(0, GDROM_DEV_NAME);
764 if (gdrom_major <= 0)
765 return gdrom_major;
766 pr_info("Registered with major number %d\n",
767 gdrom_major);
768
769 gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL);
770 if (!gd.cd_info) {
771 err = -ENOMEM;
772 goto probe_fail_no_mem;
773 }
774 probe_gdrom_setupcd();
775
776 err = blk_mq_alloc_sq_tag_set(&gd.tag_set, &gdrom_mq_ops, 1,
777 BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING);
778 if (err)
779 goto probe_fail_free_cd_info;
780
781 gd.disk = blk_mq_alloc_disk(&gd.tag_set, NULL);
782 if (IS_ERR(gd.disk)) {
783 err = PTR_ERR(gd.disk);
784 goto probe_fail_free_tag_set;
785 }
786 gd.gdrom_rq = gd.disk->queue;
787 probe_gdrom_setupdisk();
788 if (register_cdrom(gd.disk, gd.cd_info)) {
789 err = -ENODEV;
790 goto probe_fail_cleanup_disk;
791 }
792 gd.disk->fops = &gdrom_bdops;
793 gd.disk->events = DISK_EVENT_MEDIA_CHANGE;
794
795 err = gdrom_set_interrupt_handlers();
796 if (err)
797 goto probe_fail_cleanup_disk;
798
799 err = probe_gdrom_setupqueue();
800 if (err)
801 goto probe_fail_free_irqs;
802
803 gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL);
804 if (!gd.toc) {
805 err = -ENOMEM;
806 goto probe_fail_free_irqs;
807 }
808 err = add_disk(gd.disk);
809 if (err)
810 goto probe_fail_add_disk;
811
812 return 0;
813
814probe_fail_add_disk:
815 kfree(gd.toc);
816probe_fail_free_irqs:
817 free_irq(HW_EVENT_GDROM_DMA, &gd);
818 free_irq(HW_EVENT_GDROM_CMD, &gd);
819probe_fail_cleanup_disk:
820 blk_cleanup_disk(gd.disk);
821probe_fail_free_tag_set:
822 blk_mq_free_tag_set(&gd.tag_set);
823probe_fail_free_cd_info:
824 kfree(gd.cd_info);
825probe_fail_no_mem:
826 unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
827 gdrom_major = 0;
828 pr_warn("Probe failed - error is 0x%X\n", err);
829 return err;
830}
831
832static int remove_gdrom(struct platform_device *devptr)
833{
834 blk_cleanup_queue(gd.gdrom_rq);
835 blk_mq_free_tag_set(&gd.tag_set);
836 free_irq(HW_EVENT_GDROM_CMD, &gd);
837 free_irq(HW_EVENT_GDROM_DMA, &gd);
838 del_gendisk(gd.disk);
839 if (gdrom_major)
840 unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
841 unregister_cdrom(gd.cd_info);
842 kfree(gd.cd_info);
843 kfree(gd.toc);
844
845 return 0;
846}
847
848static struct platform_driver gdrom_driver = {
849 .probe = probe_gdrom,
850 .remove = remove_gdrom,
851 .driver = {
852 .name = GDROM_DEV_NAME,
853 },
854};
855
856static int __init init_gdrom(void)
857{
858 int rc;
859
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
871static void __exit exit_gdrom(void)
872{
873 platform_device_unregister(pd);
874 platform_driver_unregister(&gdrom_driver);
875}
876
877module_init(init_gdrom);
878module_exit(exit_gdrom);
879MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
880MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver");
881MODULE_LICENSE("GPL");
882
