2 pcd.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
3 Under the terms of the GNU General Public License.
5 This is a high-level driver for parallel port ATAPI CD-ROM
6 drives based on chips supported by the paride module.
8 By default, the driver will autoprobe for a single parallel
9 port ATAPI CD-ROM drive, but if their individual parameters are
10 specified, the driver can handle up to 4 drives.
12 The behaviour of the pcd driver can be altered by setting
13 some parameters from the insmod command line. The following
14 parameters are adjustable:
16 drive0 These four arguments can be arrays of
17 drive1 1-6 integers as follows:
19 drive3 <prt>,<pro>,<uni>,<mod>,<slv>,<dly>
23 <prt> is the base of the parallel port address for
24 the corresponding drive. (required)
26 <pro> is the protocol number for the adapter that
27 supports this drive. These numbers are
28 logged by 'paride' when the protocol modules
29 are initialised. (0 if not given)
31 <uni> for those adapters that support chained
32 devices, this is the unit selector for the
33 chain of devices on the given port. It should
34 be zero for devices that don't support chaining.
37 <mod> this can be -1 to choose the best mode, or one
38 of the mode numbers supported by the adapter.
41 <slv> ATAPI CD-ROMs can be jumpered to master or slave.
42 Set this to 0 to choose the master drive, 1 to
43 choose the slave, -1 (the default) to choose the
46 <dly> some parallel ports require the driver to
47 go more slowly. -1 sets a default value that
48 should work with the chosen protocol. Otherwise,
49 set this to a small integer, the larger it is
50 the slower the port i/o. In some cases, setting
51 this to zero will speed up the device. (default -1)
53 major You may use this parameter to override the
54 default major number (46) that this driver
55 will use. Be sure to change the device
58 name This parameter is a character string that
59 contains the name the kernel will use for this
60 device (in /proc output, for instance).
63 verbose This parameter controls the amount of logging
64 that the driver will do. Set it to 0 for
65 normal operation, 1 to see autoprobe progress
66 messages, or 2 to see additional debugging
69 nice This parameter controls the driver's use of
70 idle CPU time, at the expense of some speed.
72 If this driver is built into the kernel, you can use the
73 following kernel command line parameters, with the same values
74 as the corresponding module parameters listed above:
82 In addition, you can use the parameter pcd.disable to disable
89 1.01 GRG 1998.01.24 Added test unit ready support
90 1.02 GRG 1998.05.06 Changes to pcd_completion, ready_wait,
91 and loosen interpretation of ATAPI
92 standard for clearing error status.
93 Use spinlocks. Eliminate sti().
94 1.03 GRG 1998.06.16 Eliminated an Ugh
95 1.04 GRG 1998.08.15 Added extra debugging, improvements to
96 pcd_completion, use HZ in loop timing
97 1.05 GRG 1998.08.16 Conformed to "Uniform CD-ROM" standard
98 1.06 GRG 1998.08.19 Added audio ioctl support
99 1.07 GRG 1998.09.24 Increased reset timeout, added jumbo support
103 #define PCD_VERSION "1.07"
105 #define PCD_NAME "pcd"
108 /* Here are things one can override from the insmod command.
109 Most are autoprobed by paride unless set here. Verbose is off
114 static int verbose = 0;
115 static int major = PCD_MAJOR;
116 static char *name = PCD_NAME;
118 static int disable = 0;
120 static int drive0[6] = { 0, 0, 0, -1, -1, -1 };
121 static int drive1[6] = { 0, 0, 0, -1, -1, -1 };
122 static int drive2[6] = { 0, 0, 0, -1, -1, -1 };
123 static int drive3[6] = { 0, 0, 0, -1, -1, -1 };
125 static int (*drives[4])[6] = {&drive0, &drive1, &drive2, &drive3};
126 static int pcd_drive_count;
128 enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
130 /* end of parameters */
132 #include <linux/module.h>
133 #include <linux/init.h>
134 #include <linux/errno.h>
135 #include <linux/fs.h>
136 #include <linux/kernel.h>
137 #include <linux/delay.h>
138 #include <linux/cdrom.h>
139 #include <linux/spinlock.h>
140 #include <linux/blk-mq.h>
141 #include <linux/mutex.h>
142 #include <linux/uaccess.h>
144 static DEFINE_MUTEX(pcd_mutex);
145 static DEFINE_SPINLOCK(pcd_lock);
147 module_param(verbose, int, 0644);
148 module_param(major, int, 0);
149 module_param(name, charp, 0);
150 module_param(nice, int, 0);
151 module_param_array(drive0, int, NULL, 0);
152 module_param_array(drive1, int, NULL, 0);
153 module_param_array(drive2, int, NULL, 0);
154 module_param_array(drive3, int, NULL, 0);
159 #define PCD_RETRIES 5
160 #define PCD_TMO 800 /* timeout in jiffies */
161 #define PCD_DELAY 50 /* spin delay in uS */
162 #define PCD_READY_TMO 20 /* in seconds */
163 #define PCD_RESET_TMO 100 /* in tenths of a second */
165 #define PCD_SPIN (1000000*PCD_TMO)/(HZ*PCD_DELAY)
169 #define IDE_READY 0x40
170 #define IDE_BUSY 0x80
172 static int pcd_open(struct cdrom_device_info *cdi, int purpose);
173 static void pcd_release(struct cdrom_device_info *cdi);
174 static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr);
175 static unsigned int pcd_check_events(struct cdrom_device_info *cdi,
176 unsigned int clearing, int slot_nr);
177 static int pcd_tray_move(struct cdrom_device_info *cdi, int position);
178 static int pcd_lock_door(struct cdrom_device_info *cdi, int lock);
179 static int pcd_drive_reset(struct cdrom_device_info *cdi);
180 static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn);
181 static int pcd_audio_ioctl(struct cdrom_device_info *cdi,
182 unsigned int cmd, void *arg);
183 static int pcd_packet(struct cdrom_device_info *cdi,
184 struct packet_command *cgc);
186 static int pcd_detect(void);
187 static void pcd_probe_capabilities(void);
188 static void do_pcd_read_drq(void);
189 static blk_status_t pcd_queue_rq(struct blk_mq_hw_ctx *hctx,
190 const struct blk_mq_queue_data *bd);
191 static void do_pcd_read(void);
194 struct pi_adapter pia; /* interface to paride layer */
195 struct pi_adapter *pi;
196 int drive; /* master/slave */
197 int last_sense; /* result of last request sense */
198 int changed; /* media change seen */
199 int present; /* does this unit exist ? */
200 char *name; /* pcd0, pcd1, etc */
201 struct cdrom_device_info info; /* uniform cdrom interface */
202 struct gendisk *disk;
203 struct blk_mq_tag_set tag_set;
204 struct list_head rq_list;
207 static struct pcd_unit pcd[PCD_UNITS];
209 static char pcd_scratch[64];
210 static char pcd_buffer[2048]; /* raw block buffer */
211 static int pcd_bufblk = -1; /* block in buffer, in CD units,
212 -1 for nothing there. See also
216 /* the variables below are used mainly in the I/O request engine, which
217 processes only one request at a time.
220 static struct pcd_unit *pcd_current; /* current request's drive */
221 static struct request *pcd_req;
222 static int pcd_retries; /* retries on current request */
223 static int pcd_busy; /* request being processed ? */
224 static int pcd_sector; /* address of next requested sector */
225 static int pcd_count; /* number of blocks still to do */
226 static char *pcd_buf; /* buffer for request in progress */
227 static void *par_drv; /* reference of parport driver */
229 /* kernel glue structures */
231 static int pcd_block_open(struct block_device *bdev, fmode_t mode)
233 struct pcd_unit *cd = bdev->bd_disk->private_data;
236 bdev_check_media_change(bdev);
238 mutex_lock(&pcd_mutex);
239 ret = cdrom_open(&cd->info, bdev, mode);
240 mutex_unlock(&pcd_mutex);
245 static void pcd_block_release(struct gendisk *disk, fmode_t mode)
247 struct pcd_unit *cd = disk->private_data;
248 mutex_lock(&pcd_mutex);
249 cdrom_release(&cd->info, mode);
250 mutex_unlock(&pcd_mutex);
253 static int pcd_block_ioctl(struct block_device *bdev, fmode_t mode,
254 unsigned cmd, unsigned long arg)
256 struct pcd_unit *cd = bdev->bd_disk->private_data;
259 mutex_lock(&pcd_mutex);
260 ret = cdrom_ioctl(&cd->info, bdev, mode, cmd, arg);
261 mutex_unlock(&pcd_mutex);
266 static unsigned int pcd_block_check_events(struct gendisk *disk,
267 unsigned int clearing)
269 struct pcd_unit *cd = disk->private_data;
270 return cdrom_check_events(&cd->info, clearing);
273 static const struct block_device_operations pcd_bdops = {
274 .owner = THIS_MODULE,
275 .open = pcd_block_open,
276 .release = pcd_block_release,
277 .ioctl = pcd_block_ioctl,
279 .compat_ioctl = blkdev_compat_ptr_ioctl,
281 .check_events = pcd_block_check_events,
284 static const struct cdrom_device_ops pcd_dops = {
286 .release = pcd_release,
287 .drive_status = pcd_drive_status,
288 .check_events = pcd_check_events,
289 .tray_move = pcd_tray_move,
290 .lock_door = pcd_lock_door,
291 .get_mcn = pcd_get_mcn,
292 .reset = pcd_drive_reset,
293 .audio_ioctl = pcd_audio_ioctl,
294 .generic_packet = pcd_packet,
295 .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK |
296 CDC_MCN | CDC_MEDIA_CHANGED | CDC_RESET |
297 CDC_PLAY_AUDIO | CDC_GENERIC_PACKET | CDC_CD_R |
301 static const struct blk_mq_ops pcd_mq_ops = {
302 .queue_rq = pcd_queue_rq,
305 static void pcd_init_units(void)
311 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
312 struct gendisk *disk;
314 if (blk_mq_alloc_sq_tag_set(&cd->tag_set, &pcd_mq_ops, 1,
315 BLK_MQ_F_SHOULD_MERGE))
318 disk = blk_mq_alloc_disk(&cd->tag_set, cd);
320 blk_mq_free_tag_set(&cd->tag_set);
324 INIT_LIST_HEAD(&cd->rq_list);
325 blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
331 cd->drive = (*drives[unit])[D_SLV];
332 if ((*drives[unit])[D_PRT])
335 cd->name = &cd->info.name[0];
336 snprintf(cd->name, sizeof(cd->info.name), "%s%d", name, unit);
337 cd->info.ops = &pcd_dops;
338 cd->info.handle = cd;
340 cd->info.capacity = 1;
343 disk->first_minor = unit;
345 strcpy(disk->disk_name, cd->name); /* umm... */
346 disk->fops = &pcd_bdops;
347 disk->flags = GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
348 disk->events = DISK_EVENT_MEDIA_CHANGE;
352 static int pcd_open(struct cdrom_device_info *cdi, int purpose)
354 struct pcd_unit *cd = cdi->handle;
360 static void pcd_release(struct cdrom_device_info *cdi)
364 static inline int status_reg(struct pcd_unit *cd)
366 return pi_read_regr(cd->pi, 1, 6);
369 static inline int read_reg(struct pcd_unit *cd, int reg)
371 return pi_read_regr(cd->pi, 0, reg);
374 static inline void write_reg(struct pcd_unit *cd, int reg, int val)
376 pi_write_regr(cd->pi, 0, reg, val);
379 static int pcd_wait(struct pcd_unit *cd, int go, int stop, char *fun, char *msg)
384 while ((((r = status_reg(cd)) & go) || (stop && (!(r & stop))))
388 if ((r & (IDE_ERR & stop)) || (j > PCD_SPIN)) {
395 printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
396 " loop=%d phase=%d\n",
397 cd->name, fun, msg, r, s, e, j, p);
403 static int pcd_command(struct pcd_unit *cd, char *cmd, int dlen, char *fun)
407 write_reg(cd, 6, 0xa0 + 0x10 * cd->drive);
409 if (pcd_wait(cd, IDE_BUSY | IDE_DRQ, 0, fun, "before command")) {
410 pi_disconnect(cd->pi);
414 write_reg(cd, 4, dlen % 256);
415 write_reg(cd, 5, dlen / 256);
416 write_reg(cd, 7, 0xa0); /* ATAPI packet command */
418 if (pcd_wait(cd, IDE_BUSY, IDE_DRQ, fun, "command DRQ")) {
419 pi_disconnect(cd->pi);
423 if (read_reg(cd, 2) != 1) {
424 printk("%s: %s: command phase error\n", cd->name, fun);
425 pi_disconnect(cd->pi);
429 pi_write_block(cd->pi, cmd, 12);
434 static int pcd_completion(struct pcd_unit *cd, char *buf, char *fun)
436 int r, d, p, n, k, j;
442 if (!pcd_wait(cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR,
443 fun, "completion")) {
445 while (read_reg(cd, 7) & IDE_DRQ) {
446 d = read_reg(cd, 4) + 256 * read_reg(cd, 5);
447 n = (d + 3) & 0xfffc;
448 p = read_reg(cd, 2) & 3;
450 if ((p == 2) && (n > 0) && (j == 0)) {
451 pi_read_block(cd->pi, buf, n);
453 printk("%s: %s: Read %d bytes\n",
460 ("%s: %s: Unexpected phase %d, d=%d, k=%d\n",
461 cd->name, fun, p, d, k);
464 "%s: WARNING: ATAPI phase errors\n",
469 printk("%s: Stuck DRQ\n", cd->name);
473 (cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR, fun,
481 pi_disconnect(cd->pi);
486 static void pcd_req_sense(struct pcd_unit *cd, char *fun)
488 char rs_cmd[12] = { 0x03, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };
492 r = pcd_command(cd, rs_cmd, 16, "Request sense");
495 pcd_completion(cd, buf, "Request sense");
501 printk("%s: %s: Sense key: %x, ASC: %x, ASQ: %x\n",
502 cd->name, fun, buf[2] & 0xf, buf[12], buf[13]);
505 c | ((buf[12] & 0xff) << 8) | ((buf[13] & 0xff) << 16);
507 if ((c == 2) || (c == 6))
511 static int pcd_atapi(struct pcd_unit *cd, char *cmd, int dlen, char *buf, char *fun)
515 r = pcd_command(cd, cmd, dlen, fun);
518 r = pcd_completion(cd, buf, fun);
520 pcd_req_sense(cd, fun);
525 static int pcd_packet(struct cdrom_device_info *cdi, struct packet_command *cgc)
527 return pcd_atapi(cdi->handle, cgc->cmd, cgc->buflen, cgc->buffer,
531 #define DBMSG(msg) ((verbose>1)?(msg):NULL)
533 static unsigned int pcd_check_events(struct cdrom_device_info *cdi,
534 unsigned int clearing, int slot_nr)
536 struct pcd_unit *cd = cdi->handle;
537 int res = cd->changed;
540 return res ? DISK_EVENT_MEDIA_CHANGE : 0;
543 static int pcd_lock_door(struct cdrom_device_info *cdi, int lock)
545 char un_cmd[12] = { 0x1e, 0, 0, 0, lock, 0, 0, 0, 0, 0, 0, 0 };
547 return pcd_atapi(cdi->handle, un_cmd, 0, pcd_scratch,
548 lock ? "lock door" : "unlock door");
551 static int pcd_tray_move(struct cdrom_device_info *cdi, int position)
553 char ej_cmd[12] = { 0x1b, 0, 0, 0, 3 - position, 0, 0, 0, 0, 0, 0, 0 };
555 return pcd_atapi(cdi->handle, ej_cmd, 0, pcd_scratch,
556 position ? "eject" : "close tray");
559 static void pcd_sleep(int cs)
561 schedule_timeout_interruptible(cs);
564 static int pcd_reset(struct pcd_unit *cd)
567 int expect[5] = { 1, 1, 1, 0x14, 0xeb };
570 write_reg(cd, 6, 0xa0 + 0x10 * cd->drive);
573 pcd_sleep(20 * HZ / 1000); /* delay a bit */
576 while ((k++ < PCD_RESET_TMO) && (status_reg(cd) & IDE_BUSY))
580 for (i = 0; i < 5; i++)
581 flg &= (read_reg(cd, i + 1) == expect[i]);
584 printk("%s: Reset (%d) signature = ", cd->name, k);
585 for (i = 0; i < 5; i++)
586 printk("%3x", read_reg(cd, i + 1));
588 printk(" (incorrect)");
592 pi_disconnect(cd->pi);
596 static int pcd_drive_reset(struct cdrom_device_info *cdi)
598 return pcd_reset(cdi->handle);
601 static int pcd_ready_wait(struct pcd_unit *cd, int tmo)
603 char tr_cmd[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
609 pcd_atapi(cd, tr_cmd, 0, NULL, DBMSG("test unit ready"));
613 if (!(((p & 0xffff) == 0x0402) || ((p & 0xff) == 6)))
618 return 0x000020; /* timeout */
621 static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr)
623 char rc_cmd[12] = { 0x25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
624 struct pcd_unit *cd = cdi->handle;
626 if (pcd_ready_wait(cd, PCD_READY_TMO))
627 return CDS_DRIVE_NOT_READY;
628 if (pcd_atapi(cd, rc_cmd, 8, pcd_scratch, DBMSG("check media")))
633 static int pcd_identify(struct pcd_unit *cd, char *id)
636 char id_cmd[12] = { 0x12, 0, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };
640 s = pcd_atapi(cd, id_cmd, 36, pcd_buffer, "identify");
644 if ((pcd_buffer[0] & 0x1f) != 5) {
646 printk("%s: %s is not a CD-ROM\n",
647 cd->name, cd->drive ? "Slave" : "Master");
650 memcpy(id, pcd_buffer + 16, 16);
653 while ((k >= 0) && (id[k] <= 0x20)) {
658 printk("%s: %s: %s\n", cd->name, cd->drive ? "Slave" : "Master", id);
664 * returns 0, with id set if drive is detected
665 * -1, if drive detection failed
667 static int pcd_probe(struct pcd_unit *cd, int ms, char *id)
670 for (cd->drive = 0; cd->drive <= 1; cd->drive++)
671 if (!pcd_reset(cd) && !pcd_identify(cd, id))
675 if (!pcd_reset(cd) && !pcd_identify(cd, id))
681 static void pcd_probe_capabilities(void)
685 char cmd[12] = { 0x5a, 1 << 3, 0x2a, 0, 0, 0, 0, 18, 0, 0, 0, 0 };
688 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
691 r = pcd_atapi(cd, cmd, 18, buffer, "mode sense capabilities");
694 /* we should now have the cap page */
695 if ((buffer[11] & 1) == 0)
696 cd->info.mask |= CDC_CD_R;
697 if ((buffer[11] & 2) == 0)
698 cd->info.mask |= CDC_CD_RW;
699 if ((buffer[12] & 1) == 0)
700 cd->info.mask |= CDC_PLAY_AUDIO;
701 if ((buffer[14] & 1) == 0)
702 cd->info.mask |= CDC_LOCK;
703 if ((buffer[14] & 8) == 0)
704 cd->info.mask |= CDC_OPEN_TRAY;
705 if ((buffer[14] >> 6) == 0)
706 cd->info.mask |= CDC_CLOSE_TRAY;
710 static int pcd_detect(void)
716 printk("%s: %s version %s, major %d, nice %d\n",
717 name, name, PCD_VERSION, major, nice);
719 par_drv = pi_register_driver(name);
721 pr_err("failed to register %s driver\n", name);
726 if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
728 if (cd->disk && pi_init(cd->pi, 1, -1, -1, -1, -1, -1,
729 pcd_buffer, PI_PCD, verbose, cd->name)) {
730 if (!pcd_probe(cd, -1, id)) {
737 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
738 int *conf = *drives[unit];
743 if (!pi_init(cd->pi, 0, conf[D_PRT], conf[D_MOD],
744 conf[D_UNI], conf[D_PRO], conf[D_DLY],
745 pcd_buffer, PI_PCD, verbose, cd->name))
747 if (!pcd_probe(cd, conf[D_SLV], id)) {
757 printk("%s: No CD-ROM drive found\n", name);
758 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
761 blk_cleanup_disk(cd->disk);
762 blk_mq_free_tag_set(&cd->tag_set);
764 pi_unregister_driver(par_drv);
768 /* I/O request processing */
769 static int pcd_queue;
771 static int set_next_request(void)
774 int old_pos = pcd_queue;
777 cd = &pcd[pcd_queue];
778 if (++pcd_queue == PCD_UNITS)
780 if (cd->present && !list_empty(&cd->rq_list)) {
781 pcd_req = list_first_entry(&cd->rq_list, struct request,
783 list_del_init(&pcd_req->queuelist);
784 blk_mq_start_request(pcd_req);
787 } while (pcd_queue != old_pos);
789 return pcd_req != NULL;
792 static void pcd_request(void)
799 if (!pcd_req && !set_next_request())
802 cd = pcd_req->rq_disk->private_data;
803 if (cd != pcd_current)
806 pcd_sector = blk_rq_pos(pcd_req);
807 pcd_count = blk_rq_cur_sectors(pcd_req);
808 pcd_buf = bio_data(pcd_req->bio);
810 ps_set_intr(do_pcd_read, NULL, 0, nice);
813 static blk_status_t pcd_queue_rq(struct blk_mq_hw_ctx *hctx,
814 const struct blk_mq_queue_data *bd)
816 struct pcd_unit *cd = hctx->queue->queuedata;
818 if (rq_data_dir(bd->rq) != READ) {
819 blk_mq_start_request(bd->rq);
820 return BLK_STS_IOERR;
823 spin_lock_irq(&pcd_lock);
824 list_add_tail(&bd->rq->queuelist, &cd->rq_list);
826 spin_unlock_irq(&pcd_lock);
831 static inline void next_request(blk_status_t err)
833 unsigned long saved_flags;
835 spin_lock_irqsave(&pcd_lock, saved_flags);
836 if (!blk_update_request(pcd_req, err, blk_rq_cur_bytes(pcd_req))) {
837 __blk_mq_end_request(pcd_req, err);
842 spin_unlock_irqrestore(&pcd_lock, saved_flags);
845 static int pcd_ready(void)
847 return (((status_reg(pcd_current) & (IDE_BUSY | IDE_DRQ)) == IDE_DRQ));
850 static void pcd_transfer(void)
853 while (pcd_count && (pcd_sector / 4 == pcd_bufblk)) {
854 int o = (pcd_sector % 4) * 512;
855 memcpy(pcd_buf, pcd_buffer + o, 512);
862 static void pcd_start(void)
865 char rd_cmd[12] = { 0xa8, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 };
867 pcd_bufblk = pcd_sector / 4;
869 for (i = 0; i < 4; i++) {
870 rd_cmd[5 - i] = b & 0xff;
874 if (pcd_command(pcd_current, rd_cmd, 2048, "read block")) {
876 next_request(BLK_STS_IOERR);
882 ps_set_intr(do_pcd_read_drq, pcd_ready, PCD_TMO, nice);
885 static void do_pcd_read(void)
895 pi_do_claimed(pcd_current->pi, pcd_start);
898 static void do_pcd_read_drq(void)
900 unsigned long saved_flags;
902 if (pcd_completion(pcd_current, pcd_buffer, "read block")) {
903 if (pcd_retries < PCD_RETRIES) {
906 pi_do_claimed(pcd_current->pi, pcd_start);
910 next_request(BLK_STS_IOERR);
915 spin_lock_irqsave(&pcd_lock, saved_flags);
917 spin_unlock_irqrestore(&pcd_lock, saved_flags);
920 /* the audio_ioctl stuff is adapted from sr_ioctl.c */
922 static int pcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
924 struct pcd_unit *cd = cdi->handle;
928 case CDROMREADTOCHDR:
932 { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12,
934 struct cdrom_tochdr *tochdr =
935 (struct cdrom_tochdr *) arg;
939 r = pcd_atapi(cd, cmd, 12, buffer, "read toc header");
941 tochdr->cdth_trk0 = buffer[2];
942 tochdr->cdth_trk1 = buffer[3];
947 case CDROMREADTOCENTRY:
951 { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12,
954 struct cdrom_tocentry *tocentry =
955 (struct cdrom_tocentry *) arg;
956 unsigned char buffer[32];
960 (tocentry->cdte_format == CDROM_MSF ? 0x02 : 0);
961 cmd[6] = tocentry->cdte_track;
963 r = pcd_atapi(cd, cmd, 12, buffer, "read toc entry");
965 tocentry->cdte_ctrl = buffer[5] & 0xf;
966 tocentry->cdte_adr = buffer[5] >> 4;
967 tocentry->cdte_datamode =
968 (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
969 if (tocentry->cdte_format == CDROM_MSF) {
970 tocentry->cdte_addr.msf.minute = buffer[9];
971 tocentry->cdte_addr.msf.second = buffer[10];
972 tocentry->cdte_addr.msf.frame = buffer[11];
974 tocentry->cdte_addr.lba =
975 (((((buffer[8] << 8) + buffer[9]) << 8)
976 + buffer[10]) << 8) + buffer[11];
987 static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
990 { GPCMD_READ_SUBCHANNEL, 0, 0x40, 2, 0, 0, 0, 0, 24, 0, 0, 0 };
993 if (pcd_atapi(cdi->handle, cmd, 24, buffer, "get mcn"))
996 memcpy(mcn->medium_catalog_number, buffer + 9, 13);
997 mcn->medium_catalog_number[13] = 0;
1002 static int __init pcd_init(void)
1004 struct pcd_unit *cd;
1015 /* get the atapi capabilities page */
1016 pcd_probe_capabilities();
1018 if (register_blkdev(major, name)) {
1019 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
1023 blk_cleanup_queue(cd->disk->queue);
1024 blk_mq_free_tag_set(&cd->tag_set);
1030 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
1032 register_cdrom(cd->disk, &cd->info);
1033 cd->disk->private_data = cd;
1041 static void __exit pcd_exit(void)
1043 struct pcd_unit *cd;
1046 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
1051 del_gendisk(cd->disk);
1053 unregister_cdrom(&cd->info);
1055 blk_cleanup_queue(cd->disk->queue);
1056 blk_mq_free_tag_set(&cd->tag_set);
1059 unregister_blkdev(major, name);
1060 pi_unregister_driver(par_drv);
1063 MODULE_LICENSE("GPL");
1064 module_init(pcd_init)
1065 module_exit(pcd_exit)