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
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.
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.
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.
22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24 #include <linux/init.h>
25 #include <linux/module.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>
37 #include <linux/wait.h>
38 #include <linux/workqueue.h>
39 #include <linux/platform_device.h>
40 #include <scsi/scsi.h>
43 #include <asm/delay.h>
45 #include <mach/sysasic.h>
47 #define GDROM_DEV_NAME "gdrom"
48 #define GD_SESSION_OFFSET 150
51 #define GDROM_COM_SOFTRESET 0x08
52 #define GDROM_COM_EXECDIAG 0x90
53 #define GDROM_COM_PACKET 0xA0
54 #define GDROM_COM_IDDEV 0xA1
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)
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)
77 #define GDROM_HARD_SECTOR 2048
78 #define BLOCK_LAYER_SECTOR 512
81 #define GDROM_DEFAULT_TIMEOUT (HZ * 7)
85 const char * const text;
88 {RECOVERED_ERROR, "Recovered from error"},
89 {NOT_READY, "Device not ready"},
90 {MEDIUM_ERROR, "Disk not ready"},
91 {HARDWARE_ERROR, "Hardware error"},
92 {ILLEGAL_REQUEST, "Command has failed"},
93 {UNIT_ATTENTION, "Device needs attention - disk may have been changed"},
94 {DATA_PROTECT, "Data protection error"},
95 {ABORTED_COMMAND, "Command aborted"},
98 static struct platform_device *pd;
99 static int gdrom_major;
100 static DECLARE_WAIT_QUEUE_HEAD(command_queue);
101 static DECLARE_WAIT_QUEUE_HEAD(request_queue);
103 static DEFINE_SPINLOCK(gdrom_lock);
104 static void gdrom_readdisk_dma(struct work_struct *work);
105 static DECLARE_WORK(work, gdrom_readdisk_dma);
106 static LIST_HEAD(gdrom_deferred);
109 unsigned int entry[99];
110 unsigned int first, last;
111 unsigned int leadout;
114 static struct gdrom_unit {
115 struct gendisk *disk;
116 struct cdrom_device_info *cd_info;
121 struct gdromtoc *toc;
122 struct request_queue *gdrom_rq;
136 static int gdrom_getsense(short *bufstring);
137 static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
138 struct packet_command *command);
139 static int gdrom_hardreset(struct cdrom_device_info *cd_info);
141 static bool gdrom_is_busy(void)
143 return (ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) != 0;
146 static bool gdrom_data_request(void)
148 return (ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) == 8;
151 static bool gdrom_wait_clrbusy(void)
153 unsigned long timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
154 while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) &&
155 (time_before(jiffies, timeout)))
157 return time_before(jiffies, timeout + 1);
160 static bool gdrom_wait_busy_sleeps(void)
162 unsigned long timeout;
163 /* Wait to get busy first */
164 timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
165 while (!gdrom_is_busy() && time_before(jiffies, timeout))
167 /* Now wait for busy to clear */
168 return gdrom_wait_clrbusy();
171 static void gdrom_identifydevice(void *buf)
175 /* If the device won't clear it has probably
176 * been hit by a serious failure - but we'll
177 * try to return a sense key even so */
178 if (!gdrom_wait_clrbusy()) {
179 gdrom_getsense(NULL);
182 ctrl_outb(GDROM_COM_IDDEV, GDROM_STATUSCOMMAND_REG);
183 if (!gdrom_wait_busy_sleeps()) {
184 gdrom_getsense(NULL);
187 /* now read in the data */
188 for (c = 0; c < 40; c++)
189 data[c] = ctrl_inw(GDROM_DATA_REG);
192 static void gdrom_spicommand(void *spi_string, int buflen)
194 short *cmd = spi_string;
195 unsigned long timeout;
197 /* ensure IRQ_WAIT is set */
198 ctrl_outb(0x08, GDROM_ALTSTATUS_REG);
199 /* specify how many bytes we expect back */
200 ctrl_outb(buflen & 0xFF, GDROM_BCL_REG);
201 ctrl_outb((buflen >> 8) & 0xFF, GDROM_BCH_REG);
202 /* other parameters */
203 ctrl_outb(0, GDROM_INTSEC_REG);
204 ctrl_outb(0, GDROM_SECNUM_REG);
205 ctrl_outb(0, GDROM_ERROR_REG);
206 /* Wait until we can go */
207 if (!gdrom_wait_clrbusy()) {
208 gdrom_getsense(NULL);
211 timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
212 ctrl_outb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
213 while (!gdrom_data_request() && time_before(jiffies, timeout))
215 if (!time_before(jiffies, timeout + 1)) {
216 gdrom_getsense(NULL);
219 outsw(GDROM_DATA_REG, cmd, 6);
223 /* gdrom_command_executediagnostic:
224 * Used to probe for presence of working GDROM
225 * Restarts GDROM device and then applies standard ATA 3
226 * Execute Diagnostic Command: a return of '1' indicates device 0
227 * present and device 1 absent
229 static char gdrom_execute_diagnostic(void)
231 gdrom_hardreset(gd.cd_info);
232 if (!gdrom_wait_clrbusy())
234 ctrl_outb(GDROM_COM_EXECDIAG, GDROM_STATUSCOMMAND_REG);
235 if (!gdrom_wait_busy_sleeps())
237 return ctrl_inb(GDROM_ERROR_REG);
241 * Prepare disk command
245 static int gdrom_preparedisk_cmd(void)
247 struct packet_command *spin_command;
248 spin_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
251 spin_command->cmd[0] = 0x70;
252 spin_command->cmd[2] = 0x1f;
253 spin_command->buflen = 0;
255 gdrom_packetcommand(gd.cd_info, spin_command);
256 /* 60 second timeout */
257 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
258 GDROM_DEFAULT_TIMEOUT);
261 if (gd.status & 0x01) {
263 gdrom_getsense(NULL);
273 * byte 3 = sizeof TOC >> 8 ie upper byte
274 * byte 4 = sizeof TOC & 0xff ie lower byte
276 static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session)
279 struct packet_command *toc_command;
282 toc_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
285 tocsize = sizeof(struct gdromtoc);
286 toc_command->cmd[0] = 0x14;
287 toc_command->cmd[1] = session;
288 toc_command->cmd[3] = tocsize >> 8;
289 toc_command->cmd[4] = tocsize & 0xff;
290 toc_command->buflen = tocsize;
293 goto cleanup_readtoc_final;
296 gdrom_packetcommand(gd.cd_info, toc_command);
297 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
298 GDROM_DEFAULT_TIMEOUT);
301 goto cleanup_readtoc;
303 insw(GDROM_DATA_REG, toc, tocsize/2);
304 if (gd.status & 0x01)
309 cleanup_readtoc_final:
315 static int get_entry_lba(int track)
317 return (cpu_to_be32(track & 0xffffff00) - GD_SESSION_OFFSET);
320 static int get_entry_q_ctrl(int track)
322 return (track & 0x000000f0) >> 4;
325 static int get_entry_track(int track)
327 return (track & 0x0000ff00) >> 8;
330 static int gdrom_get_last_session(struct cdrom_device_info *cd_info,
331 struct cdrom_multisession *ms_info)
333 int fentry, lentry, track, data, tocuse, err;
337 /* Check if GD-ROM */
338 err = gdrom_readtoc_cmd(gd.toc, 1);
339 /* Not a GD-ROM so check if standard CD-ROM */
342 err = gdrom_readtoc_cmd(gd.toc, 0);
344 pr_info("Could not get CD table of contents\n");
349 fentry = get_entry_track(gd.toc->first);
350 lentry = get_entry_track(gd.toc->last);
351 /* Find the first data track */
352 track = get_entry_track(gd.toc->last);
354 data = gd.toc->entry[track - 1];
355 if (get_entry_q_ctrl(data))
356 break; /* ie a real data track */
358 } while (track >= fentry);
360 if ((track > 100) || (track < get_entry_track(gd.toc->first))) {
361 pr_info("No data on the last session of the CD\n");
362 gdrom_getsense(NULL);
366 ms_info->addr_format = CDROM_LBA;
367 ms_info->addr.lba = get_entry_lba(data);
368 ms_info->xa_flag = 1;
372 static int gdrom_open(struct cdrom_device_info *cd_info, int purpose)
374 /* spin up the disk */
375 return gdrom_preparedisk_cmd();
378 /* this function is required even if empty */
379 static void gdrom_release(struct cdrom_device_info *cd_info)
383 static int gdrom_drivestatus(struct cdrom_device_info *cd_info, int ignore)
385 /* read the sense key */
386 char sense = ctrl_inb(GDROM_ERROR_REG);
391 return CDS_DRIVE_NOT_READY;
396 static int gdrom_mediachanged(struct cdrom_device_info *cd_info, int ignore)
398 /* check the sense key */
399 return (ctrl_inb(GDROM_ERROR_REG) & 0xF0) == 0x60;
402 /* reset the G1 bus */
403 static int gdrom_hardreset(struct cdrom_device_info *cd_info)
406 ctrl_outl(0x1fffff, GDROM_RESET_REG);
407 for (count = 0xa0000000; count < 0xa0200000; count += 4)
412 /* keep the function looking like the universal
413 * CD Rom specification - returning int */
414 static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
415 struct packet_command *command)
417 gdrom_spicommand(&command->cmd, command->buflen);
421 /* Get Sense SPI command
422 * From Marcus Comstedt
424 * cmd + 4 = length of returned buffer
425 * Returns 5 16 bit words
427 static int gdrom_getsense(short *bufstring)
429 struct packet_command *sense_command;
434 sense_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
437 sense_command->cmd[0] = 0x13;
438 sense_command->cmd[4] = 10;
439 sense_command->buflen = 10;
440 /* even if something is pending try to get
441 * the sense key if possible */
442 if (gd.pending && !gdrom_wait_clrbusy()) {
444 goto cleanup_sense_final;
447 gdrom_packetcommand(gd.cd_info, sense_command);
448 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
449 GDROM_DEFAULT_TIMEOUT);
452 insw(GDROM_DATA_REG, &sense, sense_command->buflen/2);
454 pr_info("Drive not ready - command aborted\n");
457 sense_key = sense[1] & 0x0F;
458 if (sense_key < ARRAY_SIZE(sense_texts))
459 pr_info("%s\n", sense_texts[sense_key].text);
461 pr_err("Unknown sense key: %d\n", sense_key);
462 if (bufstring) /* return addional sense data */
463 memcpy(bufstring, &sense[4], 2);
470 kfree(sense_command);
474 static int gdrom_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
480 static struct cdrom_device_ops gdrom_ops = {
482 .release = gdrom_release,
483 .drive_status = gdrom_drivestatus,
484 .media_changed = gdrom_mediachanged,
485 .get_last_session = gdrom_get_last_session,
486 .reset = gdrom_hardreset,
487 .audio_ioctl = gdrom_audio_ioctl,
488 .capability = CDC_MULTI_SESSION | CDC_MEDIA_CHANGED |
489 CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R,
493 static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
495 return cdrom_open(gd.cd_info, bdev, mode);
498 static int gdrom_bdops_release(struct gendisk *disk, fmode_t mode)
500 cdrom_release(gd.cd_info, mode);
504 static int gdrom_bdops_mediachanged(struct gendisk *disk)
506 return cdrom_media_changed(gd.cd_info);
509 static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
510 unsigned cmd, unsigned long arg)
512 return cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg);
515 static const struct block_device_operations gdrom_bdops = {
516 .owner = THIS_MODULE,
517 .open = gdrom_bdops_open,
518 .release = gdrom_bdops_release,
519 .media_changed = gdrom_bdops_mediachanged,
520 .locked_ioctl = gdrom_bdops_ioctl,
523 static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id)
525 gd.status = ctrl_inb(GDROM_STATUSCOMMAND_REG);
529 wake_up_interruptible(&command_queue);
533 static irqreturn_t gdrom_dma_interrupt(int irq, void *dev_id)
535 gd.status = ctrl_inb(GDROM_STATUSCOMMAND_REG);
536 if (gd.transfer != 1)
539 wake_up_interruptible(&request_queue);
543 static int __devinit gdrom_set_interrupt_handlers(void)
547 err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt,
548 IRQF_DISABLED, "gdrom_command", &gd);
551 err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt,
552 IRQF_DISABLED, "gdrom_dma", &gd);
554 free_irq(HW_EVENT_GDROM_CMD, &gd);
558 /* Implement DMA read using SPI command
568 static void gdrom_readdisk_dma(struct work_struct *work)
570 int err, block, block_cnt;
571 struct packet_command *read_command;
572 struct list_head *elem, *next;
574 unsigned long timeout;
576 if (list_empty(&gdrom_deferred))
578 read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
580 return; /* get more memory later? */
581 read_command->cmd[0] = 0x30;
582 read_command->cmd[1] = 0x20;
583 spin_lock(&gdrom_lock);
584 list_for_each_safe(elem, next, &gdrom_deferred) {
585 req = list_entry(elem, struct request, queuelist);
586 spin_unlock(&gdrom_lock);
587 block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET;
588 block_cnt = blk_rq_sectors(req)/GD_TO_BLK;
589 ctrl_outl(virt_to_phys(req->buffer), GDROM_DMA_STARTADDR_REG);
590 ctrl_outl(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG);
591 ctrl_outl(1, GDROM_DMA_DIRECTION_REG);
592 ctrl_outl(1, GDROM_DMA_ENABLE_REG);
593 read_command->cmd[2] = (block >> 16) & 0xFF;
594 read_command->cmd[3] = (block >> 8) & 0xFF;
595 read_command->cmd[4] = block & 0xFF;
596 read_command->cmd[8] = (block_cnt >> 16) & 0xFF;
597 read_command->cmd[9] = (block_cnt >> 8) & 0xFF;
598 read_command->cmd[10] = block_cnt & 0xFF;
600 ctrl_outb(1, GDROM_ERROR_REG);
601 /* other registers */
602 ctrl_outb(0, GDROM_SECNUM_REG);
603 ctrl_outb(0, GDROM_BCL_REG);
604 ctrl_outb(0, GDROM_BCH_REG);
605 ctrl_outb(0, GDROM_DSEL_REG);
606 ctrl_outb(0, GDROM_INTSEC_REG);
607 /* Wait for registers to reset after any previous activity */
608 timeout = jiffies + HZ / 2;
609 while (gdrom_is_busy() && time_before(jiffies, timeout))
611 ctrl_outb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
612 timeout = jiffies + HZ / 2;
613 /* Wait for packet command to finish */
614 while (gdrom_is_busy() && time_before(jiffies, timeout))
618 outsw(GDROM_DATA_REG, &read_command->cmd, 6);
619 timeout = jiffies + HZ / 2;
620 /* Wait for any pending DMA to finish */
621 while (ctrl_inb(GDROM_DMA_STATUS_REG) &&
622 time_before(jiffies, timeout))
625 ctrl_outb(1, GDROM_DMA_STATUS_REG);
626 wait_event_interruptible_timeout(request_queue,
627 gd.transfer == 0, GDROM_DEFAULT_TIMEOUT);
628 err = gd.transfer ? -EIO : 0;
631 /* now seek to take the request spinlock
632 * before handling ending the request */
633 spin_lock(&gdrom_lock);
634 list_del_init(&req->queuelist);
635 __blk_end_request_all(req, err);
637 spin_unlock(&gdrom_lock);
641 static void gdrom_request(struct request_queue *rq)
645 while ((req = blk_fetch_request(rq)) != NULL) {
646 if (req->cmd_type != REQ_TYPE_FS) {
647 printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");
648 __blk_end_request_all(req, -EIO);
651 if (rq_data_dir(req) != READ) {
652 pr_notice("Read only device - write request ignored\n");
653 __blk_end_request_all(req, -EIO);
658 * Add to list of deferred work and then schedule
661 list_add_tail(&req->queuelist, &gdrom_deferred);
662 schedule_work(&work);
666 /* Print string identifying GD ROM device */
667 static int __devinit gdrom_outputversion(void)
670 char *model_name, *manuf_name, *firmw_ver;
673 /* query device ID */
674 id = kzalloc(sizeof(struct gdrom_id), GFP_KERNEL);
677 gdrom_identifydevice(id);
678 model_name = kstrndup(id->modname, 16, GFP_KERNEL);
681 manuf_name = kstrndup(id->mname, 16, GFP_KERNEL);
683 goto free_model_name;
684 firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL);
686 goto free_manuf_name;
687 pr_info("%s from %s with firmware %s\n",
688 model_name, manuf_name, firmw_ver);
700 /* set the default mode for DMA transfer */
701 static int __devinit gdrom_init_dma_mode(void)
703 ctrl_outb(0x13, GDROM_ERROR_REG);
704 ctrl_outb(0x22, GDROM_INTSEC_REG);
705 if (!gdrom_wait_clrbusy())
707 ctrl_outb(0xEF, GDROM_STATUSCOMMAND_REG);
708 if (!gdrom_wait_busy_sleeps())
710 /* Memory protection setting for GDROM DMA
711 * Bits 31 - 16 security: 0x8843
712 * Bits 15 and 7 reserved (0)
713 * Bits 14 - 8 start of transfer range in 1 MB blocks OR'ed with 0x80
714 * Bits 6 - 0 end of transfer range in 1 MB blocks OR'ed with 0x80
715 * (0x40 | 0x80) = start range at 0x0C000000
716 * (0x7F | 0x80) = end range at 0x0FFFFFFF */
717 ctrl_outl(0x8843407F, GDROM_DMA_ACCESS_CTRL_REG);
718 ctrl_outl(9, GDROM_DMA_WAIT_REG); /* DMA word setting */
722 static void __devinit probe_gdrom_setupcd(void)
724 gd.cd_info->ops = &gdrom_ops;
725 gd.cd_info->capacity = 1;
726 strcpy(gd.cd_info->name, GDROM_DEV_NAME);
727 gd.cd_info->mask = CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|
731 static void __devinit probe_gdrom_setupdisk(void)
733 gd.disk->major = gdrom_major;
734 gd.disk->first_minor = 1;
736 strcpy(gd.disk->disk_name, GDROM_DEV_NAME);
739 static int __devinit probe_gdrom_setupqueue(void)
741 blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR);
742 /* using DMA so memory will need to be contiguous */
743 blk_queue_max_segments(gd.gdrom_rq, 1);
744 /* set a large max size to get most from DMA */
745 blk_queue_max_segment_size(gd.gdrom_rq, 0x40000);
746 gd.disk->queue = gd.gdrom_rq;
747 return gdrom_init_dma_mode();
751 * register this as a block device and as compliant with the
752 * universal CD Rom driver interface
754 static int __devinit probe_gdrom(struct platform_device *devptr)
757 /* Start the device */
758 if (gdrom_execute_diagnostic() != 1) {
759 pr_warning("ATA Probe for GDROM failed\n");
762 /* Print out firmware ID */
763 if (gdrom_outputversion())
766 gdrom_major = register_blkdev(0, GDROM_DEV_NAME);
767 if (gdrom_major <= 0)
769 pr_info("Registered with major number %d\n",
771 /* Specify basic properties of drive */
772 gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL);
775 goto probe_fail_no_mem;
777 probe_gdrom_setupcd();
778 gd.disk = alloc_disk(1);
781 goto probe_fail_no_disk;
783 probe_gdrom_setupdisk();
784 if (register_cdrom(gd.cd_info)) {
786 goto probe_fail_cdrom_register;
788 gd.disk->fops = &gdrom_bdops;
789 /* latch on to the interrupt */
790 err = gdrom_set_interrupt_handlers();
792 goto probe_fail_cmdirq_register;
793 gd.gdrom_rq = blk_init_queue(gdrom_request, &gdrom_lock);
795 goto probe_fail_requestq;
797 err = probe_gdrom_setupqueue();
801 gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL);
808 blk_cleanup_queue(gd.gdrom_rq);
810 free_irq(HW_EVENT_GDROM_DMA, &gd);
811 free_irq(HW_EVENT_GDROM_CMD, &gd);
812 probe_fail_cmdirq_register:
813 probe_fail_cdrom_register:
814 del_gendisk(gd.disk);
817 unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
820 pr_warning("Probe failed - error is 0x%X\n", err);
824 static int __devexit remove_gdrom(struct platform_device *devptr)
826 flush_scheduled_work();
827 blk_cleanup_queue(gd.gdrom_rq);
828 free_irq(HW_EVENT_GDROM_CMD, &gd);
829 free_irq(HW_EVENT_GDROM_DMA, &gd);
830 del_gendisk(gd.disk);
832 unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
833 unregister_cdrom(gd.cd_info);
838 static struct platform_driver gdrom_driver = {
839 .probe = probe_gdrom,
840 .remove = __devexit_p(remove_gdrom),
842 .name = GDROM_DEV_NAME,
846 static int __init init_gdrom(void)
850 rc = platform_driver_register(&gdrom_driver);
853 pd = platform_device_register_simple(GDROM_DEV_NAME, -1, NULL, 0);
855 platform_driver_unregister(&gdrom_driver);
861 static void __exit exit_gdrom(void)
863 platform_device_unregister(pd);
864 platform_driver_unregister(&gdrom_driver);
868 module_init(init_gdrom);
869 module_exit(exit_gdrom);
870 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
871 MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver");
872 MODULE_LICENSE("GPL");