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/blkdev.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 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 */
224 static void *par_drv
; /* reference of parport driver */
226 /* kernel glue structures */
228 static int pcd_block_open(struct block_device
*bdev
, fmode_t mode
)
230 struct pcd_unit
*cd
= bdev
->bd_disk
->private_data
;
233 mutex_lock(&pcd_mutex
);
234 ret
= cdrom_open(&cd
->info
, bdev
, mode
);
235 mutex_unlock(&pcd_mutex
);
240 static void pcd_block_release(struct gendisk
*disk
, fmode_t mode
)
242 struct pcd_unit
*cd
= disk
->private_data
;
243 mutex_lock(&pcd_mutex
);
244 cdrom_release(&cd
->info
, mode
);
245 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 const 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);
303 disk
->queue
= blk_init_queue(do_pcd_request
, &pcd_lock
);
308 blk_queue_bounce_limit(disk
->queue
, BLK_BOUNCE_HIGH
);
314 cd
->drive
= (*drives
[unit
])[D_SLV
];
315 if ((*drives
[unit
])[D_PRT
])
318 cd
->name
= &cd
->info
.name
[0];
319 snprintf(cd
->name
, sizeof(cd
->info
.name
), "%s%d", name
, unit
);
320 cd
->info
.ops
= &pcd_dops
;
321 cd
->info
.handle
= cd
;
323 cd
->info
.capacity
= 1;
326 disk
->first_minor
= unit
;
327 strcpy(disk
->disk_name
, cd
->name
); /* umm... */
328 disk
->fops
= &pcd_bdops
;
329 disk
->flags
= GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE
;
333 static int pcd_open(struct cdrom_device_info
*cdi
, int purpose
)
335 struct pcd_unit
*cd
= cdi
->handle
;
341 static void pcd_release(struct cdrom_device_info
*cdi
)
345 static inline int status_reg(struct pcd_unit
*cd
)
347 return pi_read_regr(cd
->pi
, 1, 6);
350 static inline int read_reg(struct pcd_unit
*cd
, int reg
)
352 return pi_read_regr(cd
->pi
, 0, reg
);
355 static inline void write_reg(struct pcd_unit
*cd
, int reg
, int val
)
357 pi_write_regr(cd
->pi
, 0, reg
, val
);
360 static int pcd_wait(struct pcd_unit
*cd
, int go
, int stop
, char *fun
, char *msg
)
365 while ((((r
= status_reg(cd
)) & go
) || (stop
&& (!(r
& stop
))))
369 if ((r
& (IDE_ERR
& stop
)) || (j
> PCD_SPIN
)) {
376 printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
377 " loop=%d phase=%d\n",
378 cd
->name
, fun
, msg
, r
, s
, e
, j
, p
);
384 static int pcd_command(struct pcd_unit
*cd
, char *cmd
, int dlen
, char *fun
)
388 write_reg(cd
, 6, 0xa0 + 0x10 * cd
->drive
);
390 if (pcd_wait(cd
, IDE_BUSY
| IDE_DRQ
, 0, fun
, "before command")) {
391 pi_disconnect(cd
->pi
);
395 write_reg(cd
, 4, dlen
% 256);
396 write_reg(cd
, 5, dlen
/ 256);
397 write_reg(cd
, 7, 0xa0); /* ATAPI packet command */
399 if (pcd_wait(cd
, IDE_BUSY
, IDE_DRQ
, fun
, "command DRQ")) {
400 pi_disconnect(cd
->pi
);
404 if (read_reg(cd
, 2) != 1) {
405 printk("%s: %s: command phase error\n", cd
->name
, fun
);
406 pi_disconnect(cd
->pi
);
410 pi_write_block(cd
->pi
, cmd
, 12);
415 static int pcd_completion(struct pcd_unit
*cd
, char *buf
, char *fun
)
417 int r
, d
, p
, n
, k
, j
;
423 if (!pcd_wait(cd
, IDE_BUSY
, IDE_DRQ
| IDE_READY
| IDE_ERR
,
424 fun
, "completion")) {
426 while (read_reg(cd
, 7) & IDE_DRQ
) {
427 d
= read_reg(cd
, 4) + 256 * read_reg(cd
, 5);
428 n
= (d
+ 3) & 0xfffc;
429 p
= read_reg(cd
, 2) & 3;
431 if ((p
== 2) && (n
> 0) && (j
== 0)) {
432 pi_read_block(cd
->pi
, buf
, n
);
434 printk("%s: %s: Read %d bytes\n",
441 ("%s: %s: Unexpected phase %d, d=%d, k=%d\n",
442 cd
->name
, fun
, p
, d
, k
);
445 "%s: WARNING: ATAPI phase errors\n",
450 printk("%s: Stuck DRQ\n", cd
->name
);
454 (cd
, IDE_BUSY
, IDE_DRQ
| IDE_READY
| IDE_ERR
, fun
,
462 pi_disconnect(cd
->pi
);
467 static void pcd_req_sense(struct pcd_unit
*cd
, char *fun
)
469 char rs_cmd
[12] = { 0x03, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };
473 r
= pcd_command(cd
, rs_cmd
, 16, "Request sense");
476 pcd_completion(cd
, buf
, "Request sense");
482 printk("%s: %s: Sense key: %x, ASC: %x, ASQ: %x\n",
483 cd
->name
, fun
, buf
[2] & 0xf, buf
[12], buf
[13]);
486 c
| ((buf
[12] & 0xff) << 8) | ((buf
[13] & 0xff) << 16);
488 if ((c
== 2) || (c
== 6))
492 static int pcd_atapi(struct pcd_unit
*cd
, char *cmd
, int dlen
, char *buf
, char *fun
)
496 r
= pcd_command(cd
, cmd
, dlen
, fun
);
499 r
= pcd_completion(cd
, buf
, fun
);
501 pcd_req_sense(cd
, fun
);
506 static int pcd_packet(struct cdrom_device_info
*cdi
, struct packet_command
*cgc
)
508 return pcd_atapi(cdi
->handle
, cgc
->cmd
, cgc
->buflen
, cgc
->buffer
,
512 #define DBMSG(msg) ((verbose>1)?(msg):NULL)
514 static unsigned int pcd_check_events(struct cdrom_device_info
*cdi
,
515 unsigned int clearing
, int slot_nr
)
517 struct pcd_unit
*cd
= cdi
->handle
;
518 int res
= cd
->changed
;
521 return res
? DISK_EVENT_MEDIA_CHANGE
: 0;
524 static int pcd_lock_door(struct cdrom_device_info
*cdi
, int lock
)
526 char un_cmd
[12] = { 0x1e, 0, 0, 0, lock
, 0, 0, 0, 0, 0, 0, 0 };
528 return pcd_atapi(cdi
->handle
, un_cmd
, 0, pcd_scratch
,
529 lock
? "lock door" : "unlock door");
532 static int pcd_tray_move(struct cdrom_device_info
*cdi
, int position
)
534 char ej_cmd
[12] = { 0x1b, 0, 0, 0, 3 - position
, 0, 0, 0, 0, 0, 0, 0 };
536 return pcd_atapi(cdi
->handle
, ej_cmd
, 0, pcd_scratch
,
537 position
? "eject" : "close tray");
540 static void pcd_sleep(int cs
)
542 schedule_timeout_interruptible(cs
);
545 static int pcd_reset(struct pcd_unit
*cd
)
548 int expect
[5] = { 1, 1, 1, 0x14, 0xeb };
551 write_reg(cd
, 6, 0xa0 + 0x10 * cd
->drive
);
554 pcd_sleep(20 * HZ
/ 1000); /* delay a bit */
557 while ((k
++ < PCD_RESET_TMO
) && (status_reg(cd
) & IDE_BUSY
))
561 for (i
= 0; i
< 5; i
++)
562 flg
&= (read_reg(cd
, i
+ 1) == expect
[i
]);
565 printk("%s: Reset (%d) signature = ", cd
->name
, k
);
566 for (i
= 0; i
< 5; i
++)
567 printk("%3x", read_reg(cd
, i
+ 1));
569 printk(" (incorrect)");
573 pi_disconnect(cd
->pi
);
577 static int pcd_drive_reset(struct cdrom_device_info
*cdi
)
579 return pcd_reset(cdi
->handle
);
582 static int pcd_ready_wait(struct pcd_unit
*cd
, int tmo
)
584 char tr_cmd
[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
590 pcd_atapi(cd
, tr_cmd
, 0, NULL
, DBMSG("test unit ready"));
594 if (!(((p
& 0xffff) == 0x0402) || ((p
& 0xff) == 6)))
599 return 0x000020; /* timeout */
602 static int pcd_drive_status(struct cdrom_device_info
*cdi
, int slot_nr
)
604 char rc_cmd
[12] = { 0x25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
605 struct pcd_unit
*cd
= cdi
->handle
;
607 if (pcd_ready_wait(cd
, PCD_READY_TMO
))
608 return CDS_DRIVE_NOT_READY
;
609 if (pcd_atapi(cd
, rc_cmd
, 8, pcd_scratch
, DBMSG("check media")))
614 static int pcd_identify(struct pcd_unit
*cd
, char *id
)
617 char id_cmd
[12] = { 0x12, 0, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };
621 s
= pcd_atapi(cd
, id_cmd
, 36, pcd_buffer
, "identify");
625 if ((pcd_buffer
[0] & 0x1f) != 5) {
627 printk("%s: %s is not a CD-ROM\n",
628 cd
->name
, cd
->drive
? "Slave" : "Master");
631 memcpy(id
, pcd_buffer
+ 16, 16);
634 while ((k
>= 0) && (id
[k
] <= 0x20)) {
639 printk("%s: %s: %s\n", cd
->name
, cd
->drive
? "Slave" : "Master", id
);
645 * returns 0, with id set if drive is detected
646 * -1, if drive detection failed
648 static int pcd_probe(struct pcd_unit
*cd
, int ms
, char *id
)
651 for (cd
->drive
= 0; cd
->drive
<= 1; cd
->drive
++)
652 if (!pcd_reset(cd
) && !pcd_identify(cd
, id
))
656 if (!pcd_reset(cd
) && !pcd_identify(cd
, id
))
662 static void pcd_probe_capabilities(void)
666 char cmd
[12] = { 0x5a, 1 << 3, 0x2a, 0, 0, 0, 0, 18, 0, 0, 0, 0 };
669 for (unit
= 0, cd
= pcd
; unit
< PCD_UNITS
; unit
++, cd
++) {
672 r
= pcd_atapi(cd
, cmd
, 18, buffer
, "mode sense capabilities");
675 /* we should now have the cap page */
676 if ((buffer
[11] & 1) == 0)
677 cd
->info
.mask
|= CDC_CD_R
;
678 if ((buffer
[11] & 2) == 0)
679 cd
->info
.mask
|= CDC_CD_RW
;
680 if ((buffer
[12] & 1) == 0)
681 cd
->info
.mask
|= CDC_PLAY_AUDIO
;
682 if ((buffer
[14] & 1) == 0)
683 cd
->info
.mask
|= CDC_LOCK
;
684 if ((buffer
[14] & 8) == 0)
685 cd
->info
.mask
|= CDC_OPEN_TRAY
;
686 if ((buffer
[14] >> 6) == 0)
687 cd
->info
.mask
|= CDC_CLOSE_TRAY
;
691 static int pcd_detect(void)
697 printk("%s: %s version %s, major %d, nice %d\n",
698 name
, name
, PCD_VERSION
, major
, nice
);
700 par_drv
= pi_register_driver(name
);
702 pr_err("failed to register %s driver\n", name
);
707 if (pcd_drive_count
== 0) { /* nothing spec'd - so autoprobe for 1 */
709 if (pi_init(cd
->pi
, 1, -1, -1, -1, -1, -1, pcd_buffer
,
710 PI_PCD
, verbose
, cd
->name
)) {
711 if (!pcd_probe(cd
, -1, id
) && cd
->disk
) {
718 for (unit
= 0, cd
= pcd
; unit
< PCD_UNITS
; unit
++, cd
++) {
719 int *conf
= *drives
[unit
];
722 if (!pi_init(cd
->pi
, 0, conf
[D_PRT
], conf
[D_MOD
],
723 conf
[D_UNI
], conf
[D_PRO
], conf
[D_DLY
],
724 pcd_buffer
, PI_PCD
, verbose
, cd
->name
))
726 if (!pcd_probe(cd
, conf
[D_SLV
], id
) && cd
->disk
) {
736 printk("%s: No CD-ROM drive found\n", name
);
737 for (unit
= 0, cd
= pcd
; unit
< PCD_UNITS
; unit
++, cd
++)
739 pi_unregister_driver(par_drv
);
743 /* I/O request processing */
744 static int pcd_queue
;
746 static int set_next_request(void)
749 struct request_queue
*q
;
750 int old_pos
= pcd_queue
;
753 cd
= &pcd
[pcd_queue
];
754 q
= cd
->present
? cd
->disk
->queue
: NULL
;
755 if (++pcd_queue
== PCD_UNITS
)
758 pcd_req
= blk_fetch_request(q
);
762 } while (pcd_queue
!= old_pos
);
764 return pcd_req
!= NULL
;
767 static void pcd_request(void)
772 if (!pcd_req
&& !set_next_request())
775 if (rq_data_dir(pcd_req
) == READ
) {
776 struct pcd_unit
*cd
= pcd_req
->rq_disk
->private_data
;
777 if (cd
!= pcd_current
)
780 pcd_sector
= blk_rq_pos(pcd_req
);
781 pcd_count
= blk_rq_cur_sectors(pcd_req
);
782 pcd_buf
= bio_data(pcd_req
->bio
);
784 ps_set_intr(do_pcd_read
, NULL
, 0, nice
);
787 __blk_end_request_all(pcd_req
, BLK_STS_IOERR
);
793 static void do_pcd_request(struct request_queue
*q
)
798 static inline void next_request(blk_status_t err
)
800 unsigned long saved_flags
;
802 spin_lock_irqsave(&pcd_lock
, saved_flags
);
803 if (!__blk_end_request_cur(pcd_req
, err
))
807 spin_unlock_irqrestore(&pcd_lock
, saved_flags
);
810 static int pcd_ready(void)
812 return (((status_reg(pcd_current
) & (IDE_BUSY
| IDE_DRQ
)) == IDE_DRQ
));
815 static void pcd_transfer(void)
818 while (pcd_count
&& (pcd_sector
/ 4 == pcd_bufblk
)) {
819 int o
= (pcd_sector
% 4) * 512;
820 memcpy(pcd_buf
, pcd_buffer
+ o
, 512);
827 static void pcd_start(void)
830 char rd_cmd
[12] = { 0xa8, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 };
832 pcd_bufblk
= pcd_sector
/ 4;
834 for (i
= 0; i
< 4; i
++) {
835 rd_cmd
[5 - i
] = b
& 0xff;
839 if (pcd_command(pcd_current
, rd_cmd
, 2048, "read block")) {
841 next_request(BLK_STS_IOERR
);
847 ps_set_intr(do_pcd_read_drq
, pcd_ready
, PCD_TMO
, nice
);
850 static void do_pcd_read(void)
860 pi_do_claimed(pcd_current
->pi
, pcd_start
);
863 static void do_pcd_read_drq(void)
865 unsigned long saved_flags
;
867 if (pcd_completion(pcd_current
, pcd_buffer
, "read block")) {
868 if (pcd_retries
< PCD_RETRIES
) {
871 pi_do_claimed(pcd_current
->pi
, pcd_start
);
875 next_request(BLK_STS_IOERR
);
880 spin_lock_irqsave(&pcd_lock
, saved_flags
);
882 spin_unlock_irqrestore(&pcd_lock
, saved_flags
);
885 /* the audio_ioctl stuff is adapted from sr_ioctl.c */
887 static int pcd_audio_ioctl(struct cdrom_device_info
*cdi
, unsigned int cmd
, void *arg
)
889 struct pcd_unit
*cd
= cdi
->handle
;
893 case CDROMREADTOCHDR
:
897 { GPCMD_READ_TOC_PMA_ATIP
, 0, 0, 0, 0, 0, 0, 0, 12,
899 struct cdrom_tochdr
*tochdr
=
900 (struct cdrom_tochdr
*) arg
;
904 r
= pcd_atapi(cd
, cmd
, 12, buffer
, "read toc header");
906 tochdr
->cdth_trk0
= buffer
[2];
907 tochdr
->cdth_trk1
= buffer
[3];
912 case CDROMREADTOCENTRY
:
916 { GPCMD_READ_TOC_PMA_ATIP
, 0, 0, 0, 0, 0, 0, 0, 12,
919 struct cdrom_tocentry
*tocentry
=
920 (struct cdrom_tocentry
*) arg
;
921 unsigned char buffer
[32];
925 (tocentry
->cdte_format
== CDROM_MSF
? 0x02 : 0);
926 cmd
[6] = tocentry
->cdte_track
;
928 r
= pcd_atapi(cd
, cmd
, 12, buffer
, "read toc entry");
930 tocentry
->cdte_ctrl
= buffer
[5] & 0xf;
931 tocentry
->cdte_adr
= buffer
[5] >> 4;
932 tocentry
->cdte_datamode
=
933 (tocentry
->cdte_ctrl
& 0x04) ? 1 : 0;
934 if (tocentry
->cdte_format
== CDROM_MSF
) {
935 tocentry
->cdte_addr
.msf
.minute
= buffer
[9];
936 tocentry
->cdte_addr
.msf
.second
= buffer
[10];
937 tocentry
->cdte_addr
.msf
.frame
= buffer
[11];
939 tocentry
->cdte_addr
.lba
=
940 (((((buffer
[8] << 8) + buffer
[9]) << 8)
941 + buffer
[10]) << 8) + buffer
[11];
952 static int pcd_get_mcn(struct cdrom_device_info
*cdi
, struct cdrom_mcn
*mcn
)
955 { GPCMD_READ_SUBCHANNEL
, 0, 0x40, 2, 0, 0, 0, 0, 24, 0, 0, 0 };
958 if (pcd_atapi(cdi
->handle
, cmd
, 24, buffer
, "get mcn"))
961 memcpy(mcn
->medium_catalog_number
, buffer
+ 9, 13);
962 mcn
->medium_catalog_number
[13] = 0;
967 static int __init
pcd_init(void)
980 /* get the atapi capabilities page */
981 pcd_probe_capabilities();
983 if (register_blkdev(major
, name
)) {
984 for (unit
= 0, cd
= pcd
; unit
< PCD_UNITS
; unit
++, cd
++)
989 for (unit
= 0, cd
= pcd
; unit
< PCD_UNITS
; unit
++, cd
++) {
991 register_cdrom(&cd
->info
);
992 cd
->disk
->private_data
= cd
;
1000 static void __exit
pcd_exit(void)
1002 struct pcd_unit
*cd
;
1005 for (unit
= 0, cd
= pcd
; unit
< PCD_UNITS
; unit
++, cd
++) {
1007 del_gendisk(cd
->disk
);
1009 unregister_cdrom(&cd
->info
);
1011 blk_cleanup_queue(cd
->disk
->queue
);
1014 unregister_blkdev(major
, name
);
1015 pi_unregister_driver(par_drv
);
1018 MODULE_LICENSE("GPL");
1019 module_init(pcd_init
)
1020 module_exit(pcd_exit
)