1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* GD ROM driver for the SEGA Dreamcast
3 * copyright Adrian McMenamin, 2007
4 * With thanks to Marcus Comstedt and Nathan Keynes
5 * for work in reversing PIO and DMA
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/init.h>
11 #include <linux/module.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>
28 #include <asm/delay.h>
30 #include <mach/sysasic.h>
32 #define GDROM_DEV_NAME "gdrom"
33 #define GD_SESSION_OFFSET 150
36 #define GDROM_COM_SOFTRESET 0x08
37 #define GDROM_COM_EXECDIAG 0x90
38 #define GDROM_COM_PACKET 0xA0
39 #define GDROM_COM_IDDEV 0xA1
41 /* GD Rom registers */
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)
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)
62 #define GDROM_HARD_SECTOR 2048
63 #define BLOCK_LAYER_SECTOR 512
66 #define GDROM_DEFAULT_TIMEOUT (HZ * 7)
68 static DEFINE_MUTEX(gdrom_mutex);
71 const char * const text;
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"},
84 static struct platform_device *pd;
85 static int gdrom_major;
86 static DECLARE_WAIT_QUEUE_HEAD(command_queue);
87 static DECLARE_WAIT_QUEUE_HEAD(request_queue);
90 unsigned int entry[99];
91 unsigned int first, last;
95 static struct gdrom_unit {
97 struct cdrom_device_info *cd_info;
102 struct gdromtoc *toc;
103 struct request_queue *gdrom_rq;
104 struct blk_mq_tag_set tag_set;
118 static int gdrom_getsense(short *bufstring);
119 static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
120 struct packet_command *command);
121 static int gdrom_hardreset(struct cdrom_device_info *cd_info);
123 static bool gdrom_is_busy(void)
125 return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) != 0;
128 static bool gdrom_data_request(void)
130 return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x88) == 8;
133 static bool gdrom_wait_clrbusy(void)
135 unsigned long timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
136 while ((__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) &&
137 (time_before(jiffies, timeout)))
139 return time_before(jiffies, timeout + 1);
142 static bool gdrom_wait_busy_sleeps(void)
144 unsigned long timeout;
145 /* Wait to get busy first */
146 timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
147 while (!gdrom_is_busy() && time_before(jiffies, timeout))
149 /* Now wait for busy to clear */
150 return gdrom_wait_clrbusy();
153 static void gdrom_identifydevice(void *buf)
157 /* If the device won't clear it has probably
158 * been hit by a serious failure - but we'll
159 * try to return a sense key even so */
160 if (!gdrom_wait_clrbusy()) {
161 gdrom_getsense(NULL);
164 __raw_writeb(GDROM_COM_IDDEV, GDROM_STATUSCOMMAND_REG);
165 if (!gdrom_wait_busy_sleeps()) {
166 gdrom_getsense(NULL);
169 /* now read in the data */
170 for (c = 0; c < 40; c++)
171 data[c] = __raw_readw(GDROM_DATA_REG);
174 static void gdrom_spicommand(void *spi_string, int buflen)
176 short *cmd = spi_string;
177 unsigned long timeout;
179 /* ensure IRQ_WAIT is set */
180 __raw_writeb(0x08, GDROM_ALTSTATUS_REG);
181 /* specify how many bytes we expect back */
182 __raw_writeb(buflen & 0xFF, GDROM_BCL_REG);
183 __raw_writeb((buflen >> 8) & 0xFF, GDROM_BCH_REG);
184 /* other parameters */
185 __raw_writeb(0, GDROM_INTSEC_REG);
186 __raw_writeb(0, GDROM_SECNUM_REG);
187 __raw_writeb(0, GDROM_ERROR_REG);
188 /* Wait until we can go */
189 if (!gdrom_wait_clrbusy()) {
190 gdrom_getsense(NULL);
193 timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
194 __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
195 while (!gdrom_data_request() && time_before(jiffies, timeout))
197 if (!time_before(jiffies, timeout + 1)) {
198 gdrom_getsense(NULL);
201 outsw(GDROM_DATA_REG, cmd, 6);
205 /* gdrom_command_executediagnostic:
206 * Used to probe for presence of working GDROM
207 * Restarts GDROM device and then applies standard ATA 3
208 * Execute Diagnostic Command: a return of '1' indicates device 0
209 * present and device 1 absent
211 static char gdrom_execute_diagnostic(void)
213 gdrom_hardreset(gd.cd_info);
214 if (!gdrom_wait_clrbusy())
216 __raw_writeb(GDROM_COM_EXECDIAG, GDROM_STATUSCOMMAND_REG);
217 if (!gdrom_wait_busy_sleeps())
219 return __raw_readb(GDROM_ERROR_REG);
223 * Prepare disk command
227 static int gdrom_preparedisk_cmd(void)
229 struct packet_command *spin_command;
230 spin_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
233 spin_command->cmd[0] = 0x70;
234 spin_command->cmd[2] = 0x1f;
235 spin_command->buflen = 0;
237 gdrom_packetcommand(gd.cd_info, spin_command);
238 /* 60 second timeout */
239 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
240 GDROM_DEFAULT_TIMEOUT);
243 if (gd.status & 0x01) {
245 gdrom_getsense(NULL);
255 * byte 3 = sizeof TOC >> 8 ie upper byte
256 * byte 4 = sizeof TOC & 0xff ie lower byte
258 static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session)
261 struct packet_command *toc_command;
264 toc_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
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;
275 goto cleanup_readtoc_final;
278 gdrom_packetcommand(gd.cd_info, toc_command);
279 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
280 GDROM_DEFAULT_TIMEOUT);
283 goto cleanup_readtoc;
285 insw(GDROM_DATA_REG, toc, tocsize/2);
286 if (gd.status & 0x01)
291 cleanup_readtoc_final:
297 static int get_entry_lba(int track)
299 return (cpu_to_be32(track & 0xffffff00) - GD_SESSION_OFFSET);
302 static int get_entry_q_ctrl(int track)
304 return (track & 0x000000f0) >> 4;
307 static int get_entry_track(int track)
309 return (track & 0x0000ff00) >> 8;
312 static int gdrom_get_last_session(struct cdrom_device_info *cd_info,
313 struct cdrom_multisession *ms_info)
315 int fentry, lentry, track, data, err;
320 /* Check if GD-ROM */
321 err = gdrom_readtoc_cmd(gd.toc, 1);
322 /* Not a GD-ROM so check if standard CD-ROM */
324 err = gdrom_readtoc_cmd(gd.toc, 0);
326 pr_info("Could not get CD table of contents\n");
331 fentry = get_entry_track(gd.toc->first);
332 lentry = get_entry_track(gd.toc->last);
333 /* Find the first data track */
334 track = get_entry_track(gd.toc->last);
336 data = gd.toc->entry[track - 1];
337 if (get_entry_q_ctrl(data))
338 break; /* ie a real data track */
340 } while (track >= fentry);
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);
348 ms_info->addr_format = CDROM_LBA;
349 ms_info->addr.lba = get_entry_lba(data);
350 ms_info->xa_flag = 1;
354 static int gdrom_open(struct cdrom_device_info *cd_info, int purpose)
356 /* spin up the disk */
357 return gdrom_preparedisk_cmd();
360 /* this function is required even if empty */
361 static void gdrom_release(struct cdrom_device_info *cd_info)
365 static int gdrom_drivestatus(struct cdrom_device_info *cd_info, int ignore)
367 /* read the sense key */
368 char sense = __raw_readb(GDROM_ERROR_REG);
373 return CDS_DRIVE_NOT_READY;
378 static unsigned int gdrom_check_events(struct cdrom_device_info *cd_info,
379 unsigned int clearing, int ignore)
381 /* check the sense key */
382 return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60 ?
383 DISK_EVENT_MEDIA_CHANGE : 0;
386 /* reset the G1 bus */
387 static int gdrom_hardreset(struct cdrom_device_info *cd_info)
390 __raw_writel(0x1fffff, GDROM_RESET_REG);
391 for (count = 0xa0000000; count < 0xa0200000; count += 4)
396 /* keep the function looking like the universal
397 * CD Rom specification - returning int */
398 static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
399 struct packet_command *command)
401 gdrom_spicommand(&command->cmd, command->buflen);
405 /* Get Sense SPI command
406 * From Marcus Comstedt
408 * cmd + 4 = length of returned buffer
409 * Returns 5 16 bit words
411 static int gdrom_getsense(short *bufstring)
413 struct packet_command *sense_command;
418 sense_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
421 sense_command->cmd[0] = 0x13;
422 sense_command->cmd[4] = 10;
423 sense_command->buflen = 10;
424 /* even if something is pending try to get
425 * the sense key if possible */
426 if (gd.pending && !gdrom_wait_clrbusy()) {
428 goto cleanup_sense_final;
431 gdrom_packetcommand(gd.cd_info, sense_command);
432 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
433 GDROM_DEFAULT_TIMEOUT);
436 insw(GDROM_DATA_REG, &sense, sense_command->buflen/2);
438 pr_info("Drive not ready - command aborted\n");
441 sense_key = sense[1] & 0x0F;
442 if (sense_key < ARRAY_SIZE(sense_texts))
443 pr_info("%s\n", sense_texts[sense_key].text);
445 pr_err("Unknown sense key: %d\n", sense_key);
446 if (bufstring) /* return addional sense data */
447 memcpy(bufstring, &sense[4], 2);
454 kfree(sense_command);
458 static int gdrom_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
464 static const struct cdrom_device_ops gdrom_ops = {
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,
477 static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
481 bdev_check_media_change(bdev);
483 mutex_lock(&gdrom_mutex);
484 ret = cdrom_open(gd.cd_info, bdev, mode);
485 mutex_unlock(&gdrom_mutex);
489 static void gdrom_bdops_release(struct gendisk *disk, fmode_t mode)
491 mutex_lock(&gdrom_mutex);
492 cdrom_release(gd.cd_info, mode);
493 mutex_unlock(&gdrom_mutex);
496 static unsigned int gdrom_bdops_check_events(struct gendisk *disk,
497 unsigned int clearing)
499 return cdrom_check_events(gd.cd_info, clearing);
502 static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
503 unsigned cmd, unsigned long arg)
507 mutex_lock(&gdrom_mutex);
508 ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg);
509 mutex_unlock(&gdrom_mutex);
514 static 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,
521 .compat_ioctl = blkdev_compat_ptr_ioctl,
525 static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id)
527 gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG);
531 wake_up_interruptible(&command_queue);
535 static irqreturn_t gdrom_dma_interrupt(int irq, void *dev_id)
537 gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG);
538 if (gd.transfer != 1)
541 wake_up_interruptible(&request_queue);
545 static int gdrom_set_interrupt_handlers(void)
549 err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt,
550 0, "gdrom_command", &gd);
553 err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt,
554 0, "gdrom_dma", &gd);
556 free_irq(HW_EVENT_GDROM_CMD, &gd);
560 /* Implement DMA read using SPI command
570 static blk_status_t gdrom_readdisk_dma(struct request *req)
572 int block, block_cnt;
574 struct packet_command *read_command;
575 unsigned long timeout;
577 read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
579 return BLK_STS_RESOURCE;
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;
597 __raw_writeb(1, GDROM_ERROR_REG);
598 /* other registers */
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 /* Wait for registers to reset after any previous activity */
605 timeout = jiffies + HZ / 2;
606 while (gdrom_is_busy() && time_before(jiffies, timeout))
608 __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
609 timeout = jiffies + HZ / 2;
610 /* Wait for packet command to finish */
611 while (gdrom_is_busy() && time_before(jiffies, timeout))
615 outsw(GDROM_DATA_REG, &read_command->cmd, 6);
616 timeout = jiffies + HZ / 2;
617 /* Wait for any pending DMA to finish */
618 while (__raw_readb(GDROM_DMA_STATUS_REG) &&
619 time_before(jiffies, timeout))
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;
629 blk_mq_end_request(req, err);
634 static blk_status_t gdrom_queue_rq(struct blk_mq_hw_ctx *hctx,
635 const struct blk_mq_queue_data *bd)
637 blk_mq_start_request(bd->rq);
639 switch (req_op(bd->rq)) {
641 return gdrom_readdisk_dma(bd->rq);
643 pr_notice("Read only device - write request ignored\n");
644 return BLK_STS_IOERR;
646 printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");
647 return BLK_STS_IOERR;
651 /* Print string identifying GD ROM device */
652 static int gdrom_outputversion(void)
655 char *model_name, *manuf_name, *firmw_ver;
658 /* query device ID */
659 id = kzalloc(sizeof(struct gdrom_id), GFP_KERNEL);
662 gdrom_identifydevice(id);
663 model_name = kstrndup(id->modname, 16, GFP_KERNEL);
666 manuf_name = kstrndup(id->mname, 16, GFP_KERNEL);
668 goto free_model_name;
669 firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL);
671 goto free_manuf_name;
672 pr_info("%s from %s with firmware %s\n",
673 model_name, manuf_name, firmw_ver);
685 /* set the default mode for DMA transfer */
686 static int gdrom_init_dma_mode(void)
688 __raw_writeb(0x13, GDROM_ERROR_REG);
689 __raw_writeb(0x22, GDROM_INTSEC_REG);
690 if (!gdrom_wait_clrbusy())
692 __raw_writeb(0xEF, GDROM_STATUSCOMMAND_REG);
693 if (!gdrom_wait_busy_sleeps())
695 /* Memory protection setting for GDROM DMA
696 * Bits 31 - 16 security: 0x8843
697 * Bits 15 and 7 reserved (0)
698 * Bits 14 - 8 start of transfer range in 1 MB blocks OR'ed with 0x80
699 * Bits 6 - 0 end of transfer range in 1 MB blocks OR'ed with 0x80
700 * (0x40 | 0x80) = start range at 0x0C000000
701 * (0x7F | 0x80) = end range at 0x0FFFFFFF */
702 __raw_writel(0x8843407F, GDROM_DMA_ACCESS_CTRL_REG);
703 __raw_writel(9, GDROM_DMA_WAIT_REG); /* DMA word setting */
707 static void probe_gdrom_setupcd(void)
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|
716 static void probe_gdrom_setupdisk(void)
718 gd.disk->major = gdrom_major;
719 gd.disk->first_minor = 1;
721 gd.disk->flags |= GENHD_FL_NO_PART;
722 strcpy(gd.disk->disk_name, GDROM_DEV_NAME);
725 static int probe_gdrom_setupqueue(void)
727 blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR);
728 /* using DMA so memory will need to be contiguous */
729 blk_queue_max_segments(gd.gdrom_rq, 1);
730 /* set a large max size to get most from DMA */
731 blk_queue_max_segment_size(gd.gdrom_rq, 0x40000);
732 gd.disk->queue = gd.gdrom_rq;
733 return gdrom_init_dma_mode();
736 static const struct blk_mq_ops gdrom_mq_ops = {
737 .queue_rq = gdrom_queue_rq,
741 * register this as a block device and as compliant with the
742 * universal CD Rom driver interface
744 static int probe_gdrom(struct platform_device *devptr)
749 * Ensure our "one" device is initialized properly in case of previous
752 memset(&gd, 0, sizeof(gd));
754 /* Start the device */
755 if (gdrom_execute_diagnostic() != 1) {
756 pr_warn("ATA Probe for GDROM failed\n");
759 /* Print out firmware ID */
760 if (gdrom_outputversion())
763 gdrom_major = register_blkdev(0, GDROM_DEV_NAME);
764 if (gdrom_major <= 0)
766 pr_info("Registered with major number %d\n",
768 /* Specify basic properties of drive */
769 gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL);
772 goto probe_fail_no_mem;
774 probe_gdrom_setupcd();
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);
779 goto probe_fail_free_cd_info;
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;
786 gd.gdrom_rq = gd.disk->queue;
787 probe_gdrom_setupdisk();
788 if (register_cdrom(gd.disk, gd.cd_info)) {
790 goto probe_fail_cleanup_disk;
792 gd.disk->fops = &gdrom_bdops;
793 gd.disk->events = DISK_EVENT_MEDIA_CHANGE;
794 /* latch on to the interrupt */
795 err = gdrom_set_interrupt_handlers();
797 goto probe_fail_cleanup_disk;
799 err = probe_gdrom_setupqueue();
801 goto probe_fail_free_irqs;
803 gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL);
806 goto probe_fail_free_irqs;
808 err = add_disk(gd.disk);
810 goto probe_fail_add_disk;
816 probe_fail_free_irqs:
817 free_irq(HW_EVENT_GDROM_DMA, &gd);
818 free_irq(HW_EVENT_GDROM_CMD, &gd);
819 probe_fail_cleanup_disk:
821 probe_fail_free_tag_set:
822 blk_mq_free_tag_set(&gd.tag_set);
823 probe_fail_free_cd_info:
826 unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
828 pr_warn("Probe failed - error is 0x%X\n", err);
832 static int remove_gdrom(struct platform_device *devptr)
834 blk_mq_free_tag_set(&gd.tag_set);
835 free_irq(HW_EVENT_GDROM_CMD, &gd);
836 free_irq(HW_EVENT_GDROM_DMA, &gd);
837 del_gendisk(gd.disk);
839 unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
840 unregister_cdrom(gd.cd_info);
847 static struct platform_driver gdrom_driver = {
848 .probe = probe_gdrom,
849 .remove = remove_gdrom,
851 .name = GDROM_DEV_NAME,
855 static int __init init_gdrom(void)
859 rc = platform_driver_register(&gdrom_driver);
862 pd = platform_device_register_simple(GDROM_DEV_NAME, -1, NULL, 0);
864 platform_driver_unregister(&gdrom_driver);
870 static void __exit exit_gdrom(void)
872 platform_device_unregister(pd);
873 platform_driver_unregister(&gdrom_driver);
876 module_init(init_gdrom);
877 module_exit(exit_gdrom);
878 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
879 MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver");
880 MODULE_LICENSE("GPL");