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 overide 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 kernel
73 the following 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/blkdev.h>
141 #include <linux/mutex.h>
142 #include <asm/uaccess.h>
144 static DEFINE_MUTEX(pcd_mutex);
145 static DEFINE_SPINLOCK(pcd_lock);
147 module_param(verbose, bool, 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 void do_pcd_request(struct request_queue * q);
190 static void do_pcd_read(void);
193 struct pi_adapter pia; /* interface to paride layer */
194 struct pi_adapter *pi;
195 int drive; /* master/slave */
196 int last_sense; /* result of last request sense */
197 int changed; /* media change seen */
198 int present; /* does this unit exist ? */
199 char *name; /* pcd0, pcd1, etc */
200 struct cdrom_device_info info; /* uniform cdrom interface */
201 struct gendisk *disk;
204 static struct pcd_unit pcd[PCD_UNITS];
206 static char pcd_scratch[64];
207 static char pcd_buffer[2048]; /* raw block buffer */
208 static int pcd_bufblk = -1; /* block in buffer, in CD units,
209 -1 for nothing there. See also
213 /* the variables below are used mainly in the I/O request engine, which
214 processes only one request at a time.
217 static struct pcd_unit *pcd_current; /* current request's drive */
218 static struct request *pcd_req;
219 static int pcd_retries; /* retries on current request */
220 static int pcd_busy; /* request being processed ? */
221 static int pcd_sector; /* address of next requested sector */
222 static int pcd_count; /* number of blocks still to do */
223 static char *pcd_buf; /* buffer for request in progress */
225 /* kernel glue structures */
227 static int pcd_block_open(struct block_device *bdev, fmode_t mode)
229 struct pcd_unit *cd = bdev->bd_disk->private_data;
232 mutex_lock(&pcd_mutex);
233 ret = cdrom_open(&cd->info, bdev, mode);
234 mutex_unlock(&pcd_mutex);
239 static int pcd_block_release(struct gendisk *disk, fmode_t mode)
241 struct pcd_unit *cd = disk->private_data;
242 mutex_lock(&pcd_mutex);
243 cdrom_release(&cd->info, mode);
244 mutex_unlock(&pcd_mutex);
248 static int pcd_block_ioctl(struct block_device *bdev, fmode_t mode,
249 unsigned cmd, unsigned long arg)
251 struct pcd_unit *cd = bdev->bd_disk->private_data;
254 mutex_lock(&pcd_mutex);
255 ret = cdrom_ioctl(&cd->info, bdev, mode, cmd, arg);
256 mutex_unlock(&pcd_mutex);
261 static unsigned int pcd_block_check_events(struct gendisk *disk,
262 unsigned int clearing)
264 struct pcd_unit *cd = disk->private_data;
265 return cdrom_check_events(&cd->info, clearing);
268 static const struct block_device_operations pcd_bdops = {
269 .owner = THIS_MODULE,
270 .open = pcd_block_open,
271 .release = pcd_block_release,
272 .ioctl = pcd_block_ioctl,
273 .check_events = pcd_block_check_events,
276 static struct cdrom_device_ops pcd_dops = {
278 .release = pcd_release,
279 .drive_status = pcd_drive_status,
280 .check_events = pcd_check_events,
281 .tray_move = pcd_tray_move,
282 .lock_door = pcd_lock_door,
283 .get_mcn = pcd_get_mcn,
284 .reset = pcd_drive_reset,
285 .audio_ioctl = pcd_audio_ioctl,
286 .generic_packet = pcd_packet,
287 .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK |
288 CDC_MCN | CDC_MEDIA_CHANGED | CDC_RESET |
289 CDC_PLAY_AUDIO | CDC_GENERIC_PACKET | CDC_CD_R |
293 static void pcd_init_units(void)
299 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
300 struct gendisk *disk = alloc_disk(1);
308 cd->drive = (*drives[unit])[D_SLV];
309 if ((*drives[unit])[D_PRT])
312 cd->name = &cd->info.name[0];
313 snprintf(cd->name, sizeof(cd->info.name), "%s%d", name, unit);
314 cd->info.ops = &pcd_dops;
315 cd->info.handle = cd;
317 cd->info.capacity = 1;
320 disk->first_minor = unit;
321 strcpy(disk->disk_name, cd->name); /* umm... */
322 disk->fops = &pcd_bdops;
323 disk->flags = GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
324 disk->events = DISK_EVENT_MEDIA_CHANGE;
328 static int pcd_open(struct cdrom_device_info *cdi, int purpose)
330 struct pcd_unit *cd = cdi->handle;
336 static void pcd_release(struct cdrom_device_info *cdi)
340 static inline int status_reg(struct pcd_unit *cd)
342 return pi_read_regr(cd->pi, 1, 6);
345 static inline int read_reg(struct pcd_unit *cd, int reg)
347 return pi_read_regr(cd->pi, 0, reg);
350 static inline void write_reg(struct pcd_unit *cd, int reg, int val)
352 pi_write_regr(cd->pi, 0, reg, val);
355 static int pcd_wait(struct pcd_unit *cd, int go, int stop, char *fun, char *msg)
360 while ((((r = status_reg(cd)) & go) || (stop && (!(r & stop))))
364 if ((r & (IDE_ERR & stop)) || (j > PCD_SPIN)) {
371 printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
372 " loop=%d phase=%d\n",
373 cd->name, fun, msg, r, s, e, j, p);
379 static int pcd_command(struct pcd_unit *cd, char *cmd, int dlen, char *fun)
383 write_reg(cd, 6, 0xa0 + 0x10 * cd->drive);
385 if (pcd_wait(cd, IDE_BUSY | IDE_DRQ, 0, fun, "before command")) {
386 pi_disconnect(cd->pi);
390 write_reg(cd, 4, dlen % 256);
391 write_reg(cd, 5, dlen / 256);
392 write_reg(cd, 7, 0xa0); /* ATAPI packet command */
394 if (pcd_wait(cd, IDE_BUSY, IDE_DRQ, fun, "command DRQ")) {
395 pi_disconnect(cd->pi);
399 if (read_reg(cd, 2) != 1) {
400 printk("%s: %s: command phase error\n", cd->name, fun);
401 pi_disconnect(cd->pi);
405 pi_write_block(cd->pi, cmd, 12);
410 static int pcd_completion(struct pcd_unit *cd, char *buf, char *fun)
412 int r, d, p, n, k, j;
418 if (!pcd_wait(cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR,
419 fun, "completion")) {
421 while (read_reg(cd, 7) & IDE_DRQ) {
422 d = read_reg(cd, 4) + 256 * read_reg(cd, 5);
423 n = (d + 3) & 0xfffc;
424 p = read_reg(cd, 2) & 3;
426 if ((p == 2) && (n > 0) && (j == 0)) {
427 pi_read_block(cd->pi, buf, n);
429 printk("%s: %s: Read %d bytes\n",
436 ("%s: %s: Unexpected phase %d, d=%d, k=%d\n",
437 cd->name, fun, p, d, k);
440 "%s: WARNING: ATAPI phase errors\n",
445 printk("%s: Stuck DRQ\n", cd->name);
449 (cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR, fun,
457 pi_disconnect(cd->pi);
462 static void pcd_req_sense(struct pcd_unit *cd, char *fun)
464 char rs_cmd[12] = { 0x03, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };
468 r = pcd_command(cd, rs_cmd, 16, "Request sense");
471 pcd_completion(cd, buf, "Request sense");
477 printk("%s: %s: Sense key: %x, ASC: %x, ASQ: %x\n",
478 cd->name, fun, buf[2] & 0xf, buf[12], buf[13]);
481 c | ((buf[12] & 0xff) << 8) | ((buf[13] & 0xff) << 16);
483 if ((c == 2) || (c == 6))
487 static int pcd_atapi(struct pcd_unit *cd, char *cmd, int dlen, char *buf, char *fun)
491 r = pcd_command(cd, cmd, dlen, fun);
494 r = pcd_completion(cd, buf, fun);
496 pcd_req_sense(cd, fun);
501 static int pcd_packet(struct cdrom_device_info *cdi, struct packet_command *cgc)
503 return pcd_atapi(cdi->handle, cgc->cmd, cgc->buflen, cgc->buffer,
507 #define DBMSG(msg) ((verbose>1)?(msg):NULL)
509 static unsigned int pcd_check_events(struct cdrom_device_info *cdi,
510 unsigned int clearing, int slot_nr)
512 struct pcd_unit *cd = cdi->handle;
513 int res = cd->changed;
516 return res ? DISK_EVENT_MEDIA_CHANGE : 0;
519 static int pcd_lock_door(struct cdrom_device_info *cdi, int lock)
521 char un_cmd[12] = { 0x1e, 0, 0, 0, lock, 0, 0, 0, 0, 0, 0, 0 };
523 return pcd_atapi(cdi->handle, un_cmd, 0, pcd_scratch,
524 lock ? "lock door" : "unlock door");
527 static int pcd_tray_move(struct cdrom_device_info *cdi, int position)
529 char ej_cmd[12] = { 0x1b, 0, 0, 0, 3 - position, 0, 0, 0, 0, 0, 0, 0 };
531 return pcd_atapi(cdi->handle, ej_cmd, 0, pcd_scratch,
532 position ? "eject" : "close tray");
535 static void pcd_sleep(int cs)
537 schedule_timeout_interruptible(cs);
540 static int pcd_reset(struct pcd_unit *cd)
543 int expect[5] = { 1, 1, 1, 0x14, 0xeb };
546 write_reg(cd, 6, 0xa0 + 0x10 * cd->drive);
549 pcd_sleep(20 * HZ / 1000); /* delay a bit */
552 while ((k++ < PCD_RESET_TMO) && (status_reg(cd) & IDE_BUSY))
556 for (i = 0; i < 5; i++)
557 flg &= (read_reg(cd, i + 1) == expect[i]);
560 printk("%s: Reset (%d) signature = ", cd->name, k);
561 for (i = 0; i < 5; i++)
562 printk("%3x", read_reg(cd, i + 1));
564 printk(" (incorrect)");
568 pi_disconnect(cd->pi);
572 static int pcd_drive_reset(struct cdrom_device_info *cdi)
574 return pcd_reset(cdi->handle);
577 static int pcd_ready_wait(struct pcd_unit *cd, int tmo)
579 char tr_cmd[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
585 pcd_atapi(cd, tr_cmd, 0, NULL, DBMSG("test unit ready"));
589 if (!(((p & 0xffff) == 0x0402) || ((p & 0xff) == 6)))
594 return 0x000020; /* timeout */
597 static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr)
599 char rc_cmd[12] = { 0x25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
600 struct pcd_unit *cd = cdi->handle;
602 if (pcd_ready_wait(cd, PCD_READY_TMO))
603 return CDS_DRIVE_NOT_READY;
604 if (pcd_atapi(cd, rc_cmd, 8, pcd_scratch, DBMSG("check media")))
609 static int pcd_identify(struct pcd_unit *cd, char *id)
612 char id_cmd[12] = { 0x12, 0, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };
616 s = pcd_atapi(cd, id_cmd, 36, pcd_buffer, "identify");
620 if ((pcd_buffer[0] & 0x1f) != 5) {
622 printk("%s: %s is not a CD-ROM\n",
623 cd->name, cd->drive ? "Slave" : "Master");
626 memcpy(id, pcd_buffer + 16, 16);
629 while ((k >= 0) && (id[k] <= 0x20)) {
634 printk("%s: %s: %s\n", cd->name, cd->drive ? "Slave" : "Master", id);
640 * returns 0, with id set if drive is detected
641 * -1, if drive detection failed
643 static int pcd_probe(struct pcd_unit *cd, int ms, char *id)
646 for (cd->drive = 0; cd->drive <= 1; cd->drive++)
647 if (!pcd_reset(cd) && !pcd_identify(cd, id))
651 if (!pcd_reset(cd) && !pcd_identify(cd, id))
657 static void pcd_probe_capabilities(void)
661 char cmd[12] = { 0x5a, 1 << 3, 0x2a, 0, 0, 0, 0, 18, 0, 0, 0, 0 };
664 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
667 r = pcd_atapi(cd, cmd, 18, buffer, "mode sense capabilities");
670 /* we should now have the cap page */
671 if ((buffer[11] & 1) == 0)
672 cd->info.mask |= CDC_CD_R;
673 if ((buffer[11] & 2) == 0)
674 cd->info.mask |= CDC_CD_RW;
675 if ((buffer[12] & 1) == 0)
676 cd->info.mask |= CDC_PLAY_AUDIO;
677 if ((buffer[14] & 1) == 0)
678 cd->info.mask |= CDC_LOCK;
679 if ((buffer[14] & 8) == 0)
680 cd->info.mask |= CDC_OPEN_TRAY;
681 if ((buffer[14] >> 6) == 0)
682 cd->info.mask |= CDC_CLOSE_TRAY;
686 static int pcd_detect(void)
692 printk("%s: %s version %s, major %d, nice %d\n",
693 name, name, PCD_VERSION, major, nice);
696 if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
698 if (pi_init(cd->pi, 1, -1, -1, -1, -1, -1, pcd_buffer,
699 PI_PCD, verbose, cd->name)) {
700 if (!pcd_probe(cd, -1, id) && cd->disk) {
707 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
708 int *conf = *drives[unit];
711 if (!pi_init(cd->pi, 0, conf[D_PRT], conf[D_MOD],
712 conf[D_UNI], conf[D_PRO], conf[D_DLY],
713 pcd_buffer, PI_PCD, verbose, cd->name))
715 if (!pcd_probe(cd, conf[D_SLV], id) && cd->disk) {
725 printk("%s: No CD-ROM drive found\n", name);
726 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
731 /* I/O request processing */
732 static struct request_queue *pcd_queue;
734 static void do_pcd_request(struct request_queue * q)
740 pcd_req = blk_fetch_request(q);
745 if (rq_data_dir(pcd_req) == READ) {
746 struct pcd_unit *cd = pcd_req->rq_disk->private_data;
747 if (cd != pcd_current)
750 pcd_sector = blk_rq_pos(pcd_req);
751 pcd_count = blk_rq_cur_sectors(pcd_req);
752 pcd_buf = pcd_req->buffer;
754 ps_set_intr(do_pcd_read, NULL, 0, nice);
757 __blk_end_request_all(pcd_req, -EIO);
763 static inline void next_request(int err)
765 unsigned long saved_flags;
767 spin_lock_irqsave(&pcd_lock, saved_flags);
768 if (!__blk_end_request_cur(pcd_req, err))
771 do_pcd_request(pcd_queue);
772 spin_unlock_irqrestore(&pcd_lock, saved_flags);
775 static int pcd_ready(void)
777 return (((status_reg(pcd_current) & (IDE_BUSY | IDE_DRQ)) == IDE_DRQ));
780 static void pcd_transfer(void)
783 while (pcd_count && (pcd_sector / 4 == pcd_bufblk)) {
784 int o = (pcd_sector % 4) * 512;
785 memcpy(pcd_buf, pcd_buffer + o, 512);
792 static void pcd_start(void)
795 char rd_cmd[12] = { 0xa8, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 };
797 pcd_bufblk = pcd_sector / 4;
799 for (i = 0; i < 4; i++) {
800 rd_cmd[5 - i] = b & 0xff;
804 if (pcd_command(pcd_current, rd_cmd, 2048, "read block")) {
812 ps_set_intr(do_pcd_read_drq, pcd_ready, PCD_TMO, nice);
815 static void do_pcd_read(void)
825 pi_do_claimed(pcd_current->pi, pcd_start);
828 static void do_pcd_read_drq(void)
830 unsigned long saved_flags;
832 if (pcd_completion(pcd_current, pcd_buffer, "read block")) {
833 if (pcd_retries < PCD_RETRIES) {
836 pi_do_claimed(pcd_current->pi, pcd_start);
845 spin_lock_irqsave(&pcd_lock, saved_flags);
846 do_pcd_request(pcd_queue);
847 spin_unlock_irqrestore(&pcd_lock, saved_flags);
850 /* the audio_ioctl stuff is adapted from sr_ioctl.c */
852 static int pcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
854 struct pcd_unit *cd = cdi->handle;
858 case CDROMREADTOCHDR:
862 { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12,
864 struct cdrom_tochdr *tochdr =
865 (struct cdrom_tochdr *) arg;
869 r = pcd_atapi(cd, cmd, 12, buffer, "read toc header");
871 tochdr->cdth_trk0 = buffer[2];
872 tochdr->cdth_trk1 = buffer[3];
877 case CDROMREADTOCENTRY:
881 { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12,
884 struct cdrom_tocentry *tocentry =
885 (struct cdrom_tocentry *) arg;
886 unsigned char buffer[32];
890 (tocentry->cdte_format == CDROM_MSF ? 0x02 : 0);
891 cmd[6] = tocentry->cdte_track;
893 r = pcd_atapi(cd, cmd, 12, buffer, "read toc entry");
895 tocentry->cdte_ctrl = buffer[5] & 0xf;
896 tocentry->cdte_adr = buffer[5] >> 4;
897 tocentry->cdte_datamode =
898 (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
899 if (tocentry->cdte_format == CDROM_MSF) {
900 tocentry->cdte_addr.msf.minute = buffer[9];
901 tocentry->cdte_addr.msf.second = buffer[10];
902 tocentry->cdte_addr.msf.frame = buffer[11];
904 tocentry->cdte_addr.lba =
905 (((((buffer[8] << 8) + buffer[9]) << 8)
906 + buffer[10]) << 8) + buffer[11];
917 static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
920 { GPCMD_READ_SUBCHANNEL, 0, 0x40, 2, 0, 0, 0, 0, 24, 0, 0, 0 };
923 if (pcd_atapi(cdi->handle, cmd, 24, buffer, "get mcn"))
926 memcpy(mcn->medium_catalog_number, buffer + 9, 13);
927 mcn->medium_catalog_number[13] = 0;
932 static int __init pcd_init(void)
945 /* get the atapi capabilities page */
946 pcd_probe_capabilities();
948 if (register_blkdev(major, name)) {
949 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
954 pcd_queue = blk_init_queue(do_pcd_request, &pcd_lock);
956 unregister_blkdev(major, name);
957 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
962 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
964 register_cdrom(&cd->info);
965 cd->disk->private_data = cd;
966 cd->disk->queue = pcd_queue;
974 static void __exit pcd_exit(void)
979 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
981 del_gendisk(cd->disk);
983 unregister_cdrom(&cd->info);
987 blk_cleanup_queue(pcd_queue);
988 unregister_blkdev(major, name);
991 MODULE_LICENSE("GPL");
992 module_init(pcd_init)
993 module_exit(pcd_exit)