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/mutex.h>
38 #include <linux/wait.h>
39 #include <linux/workqueue.h>
40 #include <linux/platform_device.h>
41 #include <scsi/scsi.h>
44 #include <asm/delay.h>
46 #include <mach/sysasic.h>
48 #define GDROM_DEV_NAME "gdrom"
49 #define GD_SESSION_OFFSET 150
52 #define GDROM_COM_SOFTRESET 0x08
53 #define GDROM_COM_EXECDIAG 0x90
54 #define GDROM_COM_PACKET 0xA0
55 #define GDROM_COM_IDDEV 0xA1
57 /* GD Rom registers */
58 #define GDROM_BASE_REG 0xA05F7000
59 #define GDROM_ALTSTATUS_REG (GDROM_BASE_REG + 0x18)
60 #define GDROM_DATA_REG (GDROM_BASE_REG + 0x80)
61 #define GDROM_ERROR_REG (GDROM_BASE_REG + 0x84)
62 #define GDROM_INTSEC_REG (GDROM_BASE_REG + 0x88)
63 #define GDROM_SECNUM_REG (GDROM_BASE_REG + 0x8C)
64 #define GDROM_BCL_REG (GDROM_BASE_REG + 0x90)
65 #define GDROM_BCH_REG (GDROM_BASE_REG + 0x94)
66 #define GDROM_DSEL_REG (GDROM_BASE_REG + 0x98)
67 #define GDROM_STATUSCOMMAND_REG (GDROM_BASE_REG + 0x9C)
68 #define GDROM_RESET_REG (GDROM_BASE_REG + 0x4E4)
70 #define GDROM_DMA_STARTADDR_REG (GDROM_BASE_REG + 0x404)
71 #define GDROM_DMA_LENGTH_REG (GDROM_BASE_REG + 0x408)
72 #define GDROM_DMA_DIRECTION_REG (GDROM_BASE_REG + 0x40C)
73 #define GDROM_DMA_ENABLE_REG (GDROM_BASE_REG + 0x414)
74 #define GDROM_DMA_STATUS_REG (GDROM_BASE_REG + 0x418)
75 #define GDROM_DMA_WAIT_REG (GDROM_BASE_REG + 0x4A0)
76 #define GDROM_DMA_ACCESS_CTRL_REG (GDROM_BASE_REG + 0x4B8)
78 #define GDROM_HARD_SECTOR 2048
79 #define BLOCK_LAYER_SECTOR 512
82 #define GDROM_DEFAULT_TIMEOUT (HZ * 7)
84 static DEFINE_MUTEX(gdrom_mutex);
87 const char * const text;
90 {RECOVERED_ERROR, "Recovered from error"},
91 {NOT_READY, "Device not ready"},
92 {MEDIUM_ERROR, "Disk not ready"},
93 {HARDWARE_ERROR, "Hardware error"},
94 {ILLEGAL_REQUEST, "Command has failed"},
95 {UNIT_ATTENTION, "Device needs attention - disk may have been changed"},
96 {DATA_PROTECT, "Data protection error"},
97 {ABORTED_COMMAND, "Command aborted"},
100 static struct platform_device *pd;
101 static int gdrom_major;
102 static DECLARE_WAIT_QUEUE_HEAD(command_queue);
103 static DECLARE_WAIT_QUEUE_HEAD(request_queue);
105 static DEFINE_SPINLOCK(gdrom_lock);
106 static void gdrom_readdisk_dma(struct work_struct *work);
107 static DECLARE_WORK(work, gdrom_readdisk_dma);
108 static LIST_HEAD(gdrom_deferred);
111 unsigned int entry[99];
112 unsigned int first, last;
113 unsigned int leadout;
116 static struct gdrom_unit {
117 struct gendisk *disk;
118 struct cdrom_device_info *cd_info;
123 struct gdromtoc *toc;
124 struct request_queue *gdrom_rq;
138 static int gdrom_getsense(short *bufstring);
139 static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
140 struct packet_command *command);
141 static int gdrom_hardreset(struct cdrom_device_info *cd_info);
143 static bool gdrom_is_busy(void)
145 return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) != 0;
148 static bool gdrom_data_request(void)
150 return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x88) == 8;
153 static bool gdrom_wait_clrbusy(void)
155 unsigned long timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
156 while ((__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) &&
157 (time_before(jiffies, timeout)))
159 return time_before(jiffies, timeout + 1);
162 static bool gdrom_wait_busy_sleeps(void)
164 unsigned long timeout;
165 /* Wait to get busy first */
166 timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
167 while (!gdrom_is_busy() && time_before(jiffies, timeout))
169 /* Now wait for busy to clear */
170 return gdrom_wait_clrbusy();
173 static void gdrom_identifydevice(void *buf)
177 /* If the device won't clear it has probably
178 * been hit by a serious failure - but we'll
179 * try to return a sense key even so */
180 if (!gdrom_wait_clrbusy()) {
181 gdrom_getsense(NULL);
184 __raw_writeb(GDROM_COM_IDDEV, GDROM_STATUSCOMMAND_REG);
185 if (!gdrom_wait_busy_sleeps()) {
186 gdrom_getsense(NULL);
189 /* now read in the data */
190 for (c = 0; c < 40; c++)
191 data[c] = __raw_readw(GDROM_DATA_REG);
194 static void gdrom_spicommand(void *spi_string, int buflen)
196 short *cmd = spi_string;
197 unsigned long timeout;
199 /* ensure IRQ_WAIT is set */
200 __raw_writeb(0x08, GDROM_ALTSTATUS_REG);
201 /* specify how many bytes we expect back */
202 __raw_writeb(buflen & 0xFF, GDROM_BCL_REG);
203 __raw_writeb((buflen >> 8) & 0xFF, GDROM_BCH_REG);
204 /* other parameters */
205 __raw_writeb(0, GDROM_INTSEC_REG);
206 __raw_writeb(0, GDROM_SECNUM_REG);
207 __raw_writeb(0, GDROM_ERROR_REG);
208 /* Wait until we can go */
209 if (!gdrom_wait_clrbusy()) {
210 gdrom_getsense(NULL);
213 timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
214 __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
215 while (!gdrom_data_request() && time_before(jiffies, timeout))
217 if (!time_before(jiffies, timeout + 1)) {
218 gdrom_getsense(NULL);
221 outsw(GDROM_DATA_REG, cmd, 6);
225 /* gdrom_command_executediagnostic:
226 * Used to probe for presence of working GDROM
227 * Restarts GDROM device and then applies standard ATA 3
228 * Execute Diagnostic Command: a return of '1' indicates device 0
229 * present and device 1 absent
231 static char gdrom_execute_diagnostic(void)
233 gdrom_hardreset(gd.cd_info);
234 if (!gdrom_wait_clrbusy())
236 __raw_writeb(GDROM_COM_EXECDIAG, GDROM_STATUSCOMMAND_REG);
237 if (!gdrom_wait_busy_sleeps())
239 return __raw_readb(GDROM_ERROR_REG);
243 * Prepare disk command
247 static int gdrom_preparedisk_cmd(void)
249 struct packet_command *spin_command;
250 spin_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
253 spin_command->cmd[0] = 0x70;
254 spin_command->cmd[2] = 0x1f;
255 spin_command->buflen = 0;
257 gdrom_packetcommand(gd.cd_info, spin_command);
258 /* 60 second timeout */
259 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
260 GDROM_DEFAULT_TIMEOUT);
263 if (gd.status & 0x01) {
265 gdrom_getsense(NULL);
275 * byte 3 = sizeof TOC >> 8 ie upper byte
276 * byte 4 = sizeof TOC & 0xff ie lower byte
278 static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session)
281 struct packet_command *toc_command;
284 toc_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
287 tocsize = sizeof(struct gdromtoc);
288 toc_command->cmd[0] = 0x14;
289 toc_command->cmd[1] = session;
290 toc_command->cmd[3] = tocsize >> 8;
291 toc_command->cmd[4] = tocsize & 0xff;
292 toc_command->buflen = tocsize;
295 goto cleanup_readtoc_final;
298 gdrom_packetcommand(gd.cd_info, toc_command);
299 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
300 GDROM_DEFAULT_TIMEOUT);
303 goto cleanup_readtoc;
305 insw(GDROM_DATA_REG, toc, tocsize/2);
306 if (gd.status & 0x01)
311 cleanup_readtoc_final:
317 static int get_entry_lba(int track)
319 return (cpu_to_be32(track & 0xffffff00) - GD_SESSION_OFFSET);
322 static int get_entry_q_ctrl(int track)
324 return (track & 0x000000f0) >> 4;
327 static int get_entry_track(int track)
329 return (track & 0x0000ff00) >> 8;
332 static int gdrom_get_last_session(struct cdrom_device_info *cd_info,
333 struct cdrom_multisession *ms_info)
335 int fentry, lentry, track, data, tocuse, err;
339 /* Check if GD-ROM */
340 err = gdrom_readtoc_cmd(gd.toc, 1);
341 /* Not a GD-ROM so check if standard CD-ROM */
344 err = gdrom_readtoc_cmd(gd.toc, 0);
346 pr_info("Could not get CD table of contents\n");
351 fentry = get_entry_track(gd.toc->first);
352 lentry = get_entry_track(gd.toc->last);
353 /* Find the first data track */
354 track = get_entry_track(gd.toc->last);
356 data = gd.toc->entry[track - 1];
357 if (get_entry_q_ctrl(data))
358 break; /* ie a real data track */
360 } while (track >= fentry);
362 if ((track > 100) || (track < get_entry_track(gd.toc->first))) {
363 pr_info("No data on the last session of the CD\n");
364 gdrom_getsense(NULL);
368 ms_info->addr_format = CDROM_LBA;
369 ms_info->addr.lba = get_entry_lba(data);
370 ms_info->xa_flag = 1;
374 static int gdrom_open(struct cdrom_device_info *cd_info, int purpose)
376 /* spin up the disk */
377 return gdrom_preparedisk_cmd();
380 /* this function is required even if empty */
381 static void gdrom_release(struct cdrom_device_info *cd_info)
385 static int gdrom_drivestatus(struct cdrom_device_info *cd_info, int ignore)
387 /* read the sense key */
388 char sense = __raw_readb(GDROM_ERROR_REG);
393 return CDS_DRIVE_NOT_READY;
398 static int gdrom_mediachanged(struct cdrom_device_info *cd_info, int ignore)
400 /* check the sense key */
401 return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60;
404 /* reset the G1 bus */
405 static int gdrom_hardreset(struct cdrom_device_info *cd_info)
408 __raw_writel(0x1fffff, GDROM_RESET_REG);
409 for (count = 0xa0000000; count < 0xa0200000; count += 4)
414 /* keep the function looking like the universal
415 * CD Rom specification - returning int */
416 static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
417 struct packet_command *command)
419 gdrom_spicommand(&command->cmd, command->buflen);
423 /* Get Sense SPI command
424 * From Marcus Comstedt
426 * cmd + 4 = length of returned buffer
427 * Returns 5 16 bit words
429 static int gdrom_getsense(short *bufstring)
431 struct packet_command *sense_command;
436 sense_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
439 sense_command->cmd[0] = 0x13;
440 sense_command->cmd[4] = 10;
441 sense_command->buflen = 10;
442 /* even if something is pending try to get
443 * the sense key if possible */
444 if (gd.pending && !gdrom_wait_clrbusy()) {
446 goto cleanup_sense_final;
449 gdrom_packetcommand(gd.cd_info, sense_command);
450 wait_event_interruptible_timeout(command_queue, gd.pending == 0,
451 GDROM_DEFAULT_TIMEOUT);
454 insw(GDROM_DATA_REG, &sense, sense_command->buflen/2);
456 pr_info("Drive not ready - command aborted\n");
459 sense_key = sense[1] & 0x0F;
460 if (sense_key < ARRAY_SIZE(sense_texts))
461 pr_info("%s\n", sense_texts[sense_key].text);
463 pr_err("Unknown sense key: %d\n", sense_key);
464 if (bufstring) /* return addional sense data */
465 memcpy(bufstring, &sense[4], 2);
472 kfree(sense_command);
476 static int gdrom_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
482 static struct cdrom_device_ops gdrom_ops = {
484 .release = gdrom_release,
485 .drive_status = gdrom_drivestatus,
486 .media_changed = gdrom_mediachanged,
487 .get_last_session = gdrom_get_last_session,
488 .reset = gdrom_hardreset,
489 .audio_ioctl = gdrom_audio_ioctl,
490 .capability = CDC_MULTI_SESSION | CDC_MEDIA_CHANGED |
491 CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R,
495 static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
498 mutex_lock(&gdrom_mutex);
499 ret = cdrom_open(gd.cd_info, bdev, mode);
500 mutex_unlock(&gdrom_mutex);
504 static int gdrom_bdops_release(struct gendisk *disk, fmode_t mode)
506 mutex_lock(&gdrom_mutex);
507 cdrom_release(gd.cd_info, mode);
508 mutex_unlock(&gdrom_mutex);
512 static int gdrom_bdops_mediachanged(struct gendisk *disk)
514 return cdrom_media_changed(gd.cd_info);
517 static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
518 unsigned cmd, unsigned long arg)
522 mutex_lock(&gdrom_mutex);
523 ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg);
524 mutex_unlock(&gdrom_mutex);
529 static const struct block_device_operations gdrom_bdops = {
530 .owner = THIS_MODULE,
531 .open = gdrom_bdops_open,
532 .release = gdrom_bdops_release,
533 .media_changed = gdrom_bdops_mediachanged,
534 .ioctl = gdrom_bdops_ioctl,
537 static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id)
539 gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG);
543 wake_up_interruptible(&command_queue);
547 static irqreturn_t gdrom_dma_interrupt(int irq, void *dev_id)
549 gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG);
550 if (gd.transfer != 1)
553 wake_up_interruptible(&request_queue);
557 static int __devinit gdrom_set_interrupt_handlers(void)
561 err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt,
562 IRQF_DISABLED, "gdrom_command", &gd);
565 err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt,
566 IRQF_DISABLED, "gdrom_dma", &gd);
568 free_irq(HW_EVENT_GDROM_CMD, &gd);
572 /* Implement DMA read using SPI command
582 static void gdrom_readdisk_dma(struct work_struct *work)
584 int err, block, block_cnt;
585 struct packet_command *read_command;
586 struct list_head *elem, *next;
588 unsigned long timeout;
590 if (list_empty(&gdrom_deferred))
592 read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
594 return; /* get more memory later? */
595 read_command->cmd[0] = 0x30;
596 read_command->cmd[1] = 0x20;
597 spin_lock(&gdrom_lock);
598 list_for_each_safe(elem, next, &gdrom_deferred) {
599 req = list_entry(elem, struct request, queuelist);
600 spin_unlock(&gdrom_lock);
601 block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET;
602 block_cnt = blk_rq_sectors(req)/GD_TO_BLK;
603 __raw_writel(virt_to_phys(req->buffer), GDROM_DMA_STARTADDR_REG);
604 __raw_writel(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG);
605 __raw_writel(1, GDROM_DMA_DIRECTION_REG);
606 __raw_writel(1, GDROM_DMA_ENABLE_REG);
607 read_command->cmd[2] = (block >> 16) & 0xFF;
608 read_command->cmd[3] = (block >> 8) & 0xFF;
609 read_command->cmd[4] = block & 0xFF;
610 read_command->cmd[8] = (block_cnt >> 16) & 0xFF;
611 read_command->cmd[9] = (block_cnt >> 8) & 0xFF;
612 read_command->cmd[10] = block_cnt & 0xFF;
614 __raw_writeb(1, GDROM_ERROR_REG);
615 /* other registers */
616 __raw_writeb(0, GDROM_SECNUM_REG);
617 __raw_writeb(0, GDROM_BCL_REG);
618 __raw_writeb(0, GDROM_BCH_REG);
619 __raw_writeb(0, GDROM_DSEL_REG);
620 __raw_writeb(0, GDROM_INTSEC_REG);
621 /* Wait for registers to reset after any previous activity */
622 timeout = jiffies + HZ / 2;
623 while (gdrom_is_busy() && time_before(jiffies, timeout))
625 __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
626 timeout = jiffies + HZ / 2;
627 /* Wait for packet command to finish */
628 while (gdrom_is_busy() && time_before(jiffies, timeout))
632 outsw(GDROM_DATA_REG, &read_command->cmd, 6);
633 timeout = jiffies + HZ / 2;
634 /* Wait for any pending DMA to finish */
635 while (__raw_readb(GDROM_DMA_STATUS_REG) &&
636 time_before(jiffies, timeout))
639 __raw_writeb(1, GDROM_DMA_STATUS_REG);
640 wait_event_interruptible_timeout(request_queue,
641 gd.transfer == 0, GDROM_DEFAULT_TIMEOUT);
642 err = gd.transfer ? -EIO : 0;
645 /* now seek to take the request spinlock
646 * before handling ending the request */
647 spin_lock(&gdrom_lock);
648 list_del_init(&req->queuelist);
649 __blk_end_request_all(req, err);
651 spin_unlock(&gdrom_lock);
655 static void gdrom_request(struct request_queue *rq)
659 while ((req = blk_fetch_request(rq)) != NULL) {
660 if (req->cmd_type != REQ_TYPE_FS) {
661 printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");
662 __blk_end_request_all(req, -EIO);
665 if (rq_data_dir(req) != READ) {
666 pr_notice("Read only device - write request ignored\n");
667 __blk_end_request_all(req, -EIO);
672 * Add to list of deferred work and then schedule
675 list_add_tail(&req->queuelist, &gdrom_deferred);
676 schedule_work(&work);
680 /* Print string identifying GD ROM device */
681 static int __devinit gdrom_outputversion(void)
684 char *model_name, *manuf_name, *firmw_ver;
687 /* query device ID */
688 id = kzalloc(sizeof(struct gdrom_id), GFP_KERNEL);
691 gdrom_identifydevice(id);
692 model_name = kstrndup(id->modname, 16, GFP_KERNEL);
695 manuf_name = kstrndup(id->mname, 16, GFP_KERNEL);
697 goto free_model_name;
698 firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL);
700 goto free_manuf_name;
701 pr_info("%s from %s with firmware %s\n",
702 model_name, manuf_name, firmw_ver);
714 /* set the default mode for DMA transfer */
715 static int __devinit gdrom_init_dma_mode(void)
717 __raw_writeb(0x13, GDROM_ERROR_REG);
718 __raw_writeb(0x22, GDROM_INTSEC_REG);
719 if (!gdrom_wait_clrbusy())
721 __raw_writeb(0xEF, GDROM_STATUSCOMMAND_REG);
722 if (!gdrom_wait_busy_sleeps())
724 /* Memory protection setting for GDROM DMA
725 * Bits 31 - 16 security: 0x8843
726 * Bits 15 and 7 reserved (0)
727 * Bits 14 - 8 start of transfer range in 1 MB blocks OR'ed with 0x80
728 * Bits 6 - 0 end of transfer range in 1 MB blocks OR'ed with 0x80
729 * (0x40 | 0x80) = start range at 0x0C000000
730 * (0x7F | 0x80) = end range at 0x0FFFFFFF */
731 __raw_writel(0x8843407F, GDROM_DMA_ACCESS_CTRL_REG);
732 __raw_writel(9, GDROM_DMA_WAIT_REG); /* DMA word setting */
736 static void __devinit probe_gdrom_setupcd(void)
738 gd.cd_info->ops = &gdrom_ops;
739 gd.cd_info->capacity = 1;
740 strcpy(gd.cd_info->name, GDROM_DEV_NAME);
741 gd.cd_info->mask = CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|
745 static void __devinit probe_gdrom_setupdisk(void)
747 gd.disk->major = gdrom_major;
748 gd.disk->first_minor = 1;
750 strcpy(gd.disk->disk_name, GDROM_DEV_NAME);
753 static int __devinit probe_gdrom_setupqueue(void)
755 blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR);
756 /* using DMA so memory will need to be contiguous */
757 blk_queue_max_segments(gd.gdrom_rq, 1);
758 /* set a large max size to get most from DMA */
759 blk_queue_max_segment_size(gd.gdrom_rq, 0x40000);
760 gd.disk->queue = gd.gdrom_rq;
761 return gdrom_init_dma_mode();
765 * register this as a block device and as compliant with the
766 * universal CD Rom driver interface
768 static int __devinit probe_gdrom(struct platform_device *devptr)
771 /* Start the device */
772 if (gdrom_execute_diagnostic() != 1) {
773 pr_warning("ATA Probe for GDROM failed\n");
776 /* Print out firmware ID */
777 if (gdrom_outputversion())
780 gdrom_major = register_blkdev(0, GDROM_DEV_NAME);
781 if (gdrom_major <= 0)
783 pr_info("Registered with major number %d\n",
785 /* Specify basic properties of drive */
786 gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL);
789 goto probe_fail_no_mem;
791 probe_gdrom_setupcd();
792 gd.disk = alloc_disk(1);
795 goto probe_fail_no_disk;
797 probe_gdrom_setupdisk();
798 if (register_cdrom(gd.cd_info)) {
800 goto probe_fail_cdrom_register;
802 gd.disk->fops = &gdrom_bdops;
803 /* latch on to the interrupt */
804 err = gdrom_set_interrupt_handlers();
806 goto probe_fail_cmdirq_register;
807 gd.gdrom_rq = blk_init_queue(gdrom_request, &gdrom_lock);
809 goto probe_fail_requestq;
811 err = probe_gdrom_setupqueue();
815 gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL);
822 blk_cleanup_queue(gd.gdrom_rq);
824 free_irq(HW_EVENT_GDROM_DMA, &gd);
825 free_irq(HW_EVENT_GDROM_CMD, &gd);
826 probe_fail_cmdirq_register:
827 probe_fail_cdrom_register:
828 del_gendisk(gd.disk);
831 unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
834 pr_warning("Probe failed - error is 0x%X\n", err);
838 static int __devexit remove_gdrom(struct platform_device *devptr)
840 flush_work_sync(&work);
841 blk_cleanup_queue(gd.gdrom_rq);
842 free_irq(HW_EVENT_GDROM_CMD, &gd);
843 free_irq(HW_EVENT_GDROM_DMA, &gd);
844 del_gendisk(gd.disk);
846 unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
847 unregister_cdrom(gd.cd_info);
852 static struct platform_driver gdrom_driver = {
853 .probe = probe_gdrom,
854 .remove = __devexit_p(remove_gdrom),
856 .name = GDROM_DEV_NAME,
860 static int __init init_gdrom(void)
864 rc = platform_driver_register(&gdrom_driver);
867 pd = platform_device_register_simple(GDROM_DEV_NAME, -1, NULL, 0);
869 platform_driver_unregister(&gdrom_driver);
875 static void __exit exit_gdrom(void)
877 platform_device_unregister(pd);
878 platform_driver_unregister(&gdrom_driver);
882 module_init(init_gdrom);
883 module_exit(exit_gdrom);
884 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
885 MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver");
886 MODULE_LICENSE("GPL");