| 1 |
1626 |
jcastillo |
/* cdrom.c. Common ioctl and open routines for various Linux cdrom drivers. -*- linux-c -*-
|
| 2 |
|
|
Copyright (c) 1996 David van Leeuwen.
|
| 3 |
|
|
|
| 4 |
|
|
The routines in the file should provide an interface between
|
| 5 |
|
|
software accessing cdroms and the various drivers that implement
|
| 6 |
|
|
specific hardware devices.
|
| 7 |
|
|
|
| 8 |
|
|
*/
|
| 9 |
|
|
|
| 10 |
|
|
#include <linux/module.h>
|
| 11 |
|
|
#include <linux/fs.h>
|
| 12 |
|
|
#include <linux/major.h>
|
| 13 |
|
|
#include <linux/types.h>
|
| 14 |
|
|
#include <linux/errno.h>
|
| 15 |
|
|
#include <linux/kernel.h>
|
| 16 |
|
|
#include <linux/mm.h>
|
| 17 |
|
|
#include <asm/fcntl.h>
|
| 18 |
|
|
|
| 19 |
|
|
#include <linux/cdrom.h>
|
| 20 |
|
|
#include <linux/ucdrom.h>
|
| 21 |
|
|
|
| 22 |
|
|
#define FM_WRITE 0x2 /* file mode write bit */
|
| 23 |
|
|
|
| 24 |
|
|
#define VERSION "$Id: cdrom.c,v 1.1 2005-12-20 10:16:38 jcastillo Exp $"
|
| 25 |
|
|
|
| 26 |
|
|
/* Not-exported routines. */
|
| 27 |
|
|
int cdrom_open(struct inode *ip, struct file *fp);
|
| 28 |
|
|
void cdrom_release(struct inode *ip, struct file *fp);
|
| 29 |
|
|
int cdrom_ioctl(struct inode *ip, struct file *fp,
|
| 30 |
|
|
unsigned int cmd, unsigned long arg);
|
| 31 |
|
|
int cdrom_media_changed(kdev_t dev);
|
| 32 |
|
|
|
| 33 |
|
|
struct file_operations cdrom_fops =
|
| 34 |
|
|
{
|
| 35 |
|
|
NULL, /* lseek */
|
| 36 |
|
|
block_read, /* read - general block-dev read */
|
| 37 |
|
|
block_write, /* write - general block-dev write */
|
| 38 |
|
|
NULL, /* readdir */
|
| 39 |
|
|
NULL, /* select */
|
| 40 |
|
|
cdrom_ioctl, /* ioctl */
|
| 41 |
|
|
NULL, /* mmap */
|
| 42 |
|
|
cdrom_open, /* open */
|
| 43 |
|
|
cdrom_release, /* release */
|
| 44 |
|
|
NULL, /* fsync */
|
| 45 |
|
|
NULL, /* fasync */
|
| 46 |
|
|
cdrom_media_changed, /* media_change */
|
| 47 |
|
|
NULL /* revalidate */
|
| 48 |
|
|
};
|
| 49 |
|
|
|
| 50 |
|
|
static struct cdrom_device_ops *cdromdevs[MAX_BLKDEV] = {
|
| 51 |
|
|
NULL,
|
| 52 |
|
|
};
|
| 53 |
|
|
|
| 54 |
|
|
/* This macro makes sure we don't have to check on cdrom_device_ops
|
| 55 |
|
|
* existence in the run-time routines below. Change_capability is a
|
| 56 |
|
|
* hack to have the capability flags defined const, while we can still
|
| 57 |
|
|
* change it here without gcc complaining at every line.
|
| 58 |
|
|
*/
|
| 59 |
|
|
|
| 60 |
|
|
#define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
|
| 61 |
|
|
|
| 62 |
|
|
/* We don't use $name$ yet, but it could be used for the /proc
|
| 63 |
|
|
* filesystem in the future, or for other purposes.
|
| 64 |
|
|
*/
|
| 65 |
|
|
int register_cdrom(int major, char *name, struct cdrom_device_ops *cdo)
|
| 66 |
|
|
{
|
| 67 |
|
|
int *change_capability = &cdo->capability; /* hack, gcc complains OK */
|
| 68 |
|
|
|
| 69 |
|
|
if (major < 0 || major >= MAX_BLKDEV)
|
| 70 |
|
|
return -1;
|
| 71 |
|
|
if (cdo->open_files == NULL || cdo->open == NULL ||
|
| 72 |
|
|
cdo->release == NULL)
|
| 73 |
|
|
return -2;
|
| 74 |
|
|
ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
|
| 75 |
|
|
ENSURE(lock_door, CDC_LOCK);
|
| 76 |
|
|
ENSURE(select_speed, CDC_SELECT_SPEED);
|
| 77 |
|
|
ENSURE(select_disc, CDC_SELECT_DISC);
|
| 78 |
|
|
ENSURE(get_last_session, CDC_MULTI_SESSION);
|
| 79 |
|
|
ENSURE(audio_ioctl, CDC_PLAY_AUDIO);
|
| 80 |
|
|
ENSURE(media_changed, CDC_MEDIA_CHANGED);
|
| 81 |
|
|
cdromdevs[major] = cdo;
|
| 82 |
|
|
cdo->options = CDO_AUTO_CLOSE | CDO_USE_FFLAGS | CDO_LOCK;
|
| 83 |
|
|
cdo->mc_flags = 0;
|
| 84 |
|
|
return 0;
|
| 85 |
|
|
}
|
| 86 |
|
|
#undef ENSURE
|
| 87 |
|
|
|
| 88 |
|
|
int unregister_cdrom(int major, char *name)
|
| 89 |
|
|
{
|
| 90 |
|
|
if (major < 0 || major >= MAX_BLKDEV)
|
| 91 |
|
|
return -1;
|
| 92 |
|
|
if (cdromdevs[major] == NULL)
|
| 93 |
|
|
return -2;
|
| 94 |
|
|
cdromdevs[major] = NULL;
|
| 95 |
|
|
return 0;
|
| 96 |
|
|
}
|
| 97 |
|
|
|
| 98 |
|
|
/* We need our own cdrom error types! This is a temporary solution. */
|
| 99 |
|
|
|
| 100 |
|
|
#ifndef ENOMEDIUM
|
| 101 |
|
|
#define ENOMEDIUM EAGAIN /* no medium in removable device */
|
| 102 |
|
|
#endif
|
| 103 |
|
|
|
| 104 |
|
|
/* We use the open-option O_NONBLOCK to indicate that the
|
| 105 |
|
|
* purpose of opening is only for subsequent ioctl() calls; no device
|
| 106 |
|
|
* integrity checks are performed.
|
| 107 |
|
|
*
|
| 108 |
|
|
* We hope that all cd-player programs will adopt this convention. It
|
| 109 |
|
|
* is in their own interest: device control becomes a lot easier
|
| 110 |
|
|
* this way.
|
| 111 |
|
|
*/
|
| 112 |
|
|
int open_for_data(struct cdrom_device_ops *, kdev_t);
|
| 113 |
|
|
|
| 114 |
|
|
int cdrom_open(struct inode *ip, struct file *fp)
|
| 115 |
|
|
{
|
| 116 |
|
|
kdev_t dev = ip->i_rdev;
|
| 117 |
|
|
struct cdrom_device_ops *cdo = cdromdevs[MAJOR(dev)];
|
| 118 |
|
|
int purpose = !!(fp->f_flags & O_NONBLOCK);
|
| 119 |
|
|
|
| 120 |
|
|
if (cdo == NULL || MINOR(dev) >= cdo->minors)
|
| 121 |
|
|
return -ENODEV;
|
| 122 |
|
|
if (fp->f_mode & FM_WRITE)
|
| 123 |
|
|
return -EROFS;
|
| 124 |
|
|
purpose = purpose || !(cdo->options & CDO_USE_FFLAGS);
|
| 125 |
|
|
if (cdo->open_files(dev) || purpose)
|
| 126 |
|
|
return cdo->open(dev, purpose);
|
| 127 |
|
|
else
|
| 128 |
|
|
return open_for_data(cdo, dev);
|
| 129 |
|
|
}
|
| 130 |
|
|
|
| 131 |
|
|
int open_for_data(struct cdrom_device_ops * cdo, kdev_t dev)
|
| 132 |
|
|
{
|
| 133 |
|
|
int ret;
|
| 134 |
|
|
if (cdo->drive_status != NULL) {
|
| 135 |
|
|
int ds = cdo->drive_status(dev);
|
| 136 |
|
|
if (ds == CDS_TRAY_OPEN) {
|
| 137 |
|
|
/* can/may i close it? */
|
| 138 |
|
|
if (cdo->capability & ~cdo->mask & CDC_CLOSE_TRAY &&
|
| 139 |
|
|
cdo->options & CDO_AUTO_CLOSE) {
|
| 140 |
|
|
if (cdo->tray_move(dev, 0))
|
| 141 |
|
|
return -EIO;
|
| 142 |
|
|
} else
|
| 143 |
|
|
return -ENOMEDIUM; /* can't close: too bad */
|
| 144 |
|
|
ds = cdo->drive_status(dev);
|
| 145 |
|
|
if (ds == CDS_NO_DISC)
|
| 146 |
|
|
return -ENOMEDIUM;
|
| 147 |
|
|
}
|
| 148 |
|
|
}
|
| 149 |
|
|
if (cdo->disc_status != NULL) {
|
| 150 |
|
|
int ds = cdo->disc_status(dev);
|
| 151 |
|
|
if (ds == CDS_NO_DISC)
|
| 152 |
|
|
return -ENOMEDIUM;
|
| 153 |
|
|
if (cdo->options & CDO_CHECK_TYPE &&
|
| 154 |
|
|
ds != CDS_DATA_1)
|
| 155 |
|
|
return -ENODATA;
|
| 156 |
|
|
}
|
| 157 |
|
|
/* all is well, we can open the device */
|
| 158 |
|
|
ret = cdo->open(dev, 0); /* open for data */
|
| 159 |
|
|
if (cdo->capability & ~cdo->mask & CDC_LOCK &&
|
| 160 |
|
|
cdo->options & CDO_LOCK)
|
| 161 |
|
|
cdo->lock_door(dev, 1);
|
| 162 |
|
|
return ret;
|
| 163 |
|
|
}
|
| 164 |
|
|
|
| 165 |
|
|
/* Admittedly, the logic below could be performed in a nicer way. */
|
| 166 |
|
|
void cdrom_release(struct inode *ip, struct file *fp)
|
| 167 |
|
|
{
|
| 168 |
|
|
kdev_t dev = ip->i_rdev;
|
| 169 |
|
|
struct cdrom_device_ops *cdo = cdromdevs[MAJOR(dev)];
|
| 170 |
|
|
|
| 171 |
|
|
if (cdo == NULL || MINOR(dev) >= cdo->minors)
|
| 172 |
|
|
return;
|
| 173 |
|
|
if (cdo->open_files(dev) == 1 && /* last process that closes dev */
|
| 174 |
|
|
cdo->options & CDO_LOCK &&
|
| 175 |
|
|
cdo->capability & ~cdo->mask & CDC_LOCK)
|
| 176 |
|
|
cdo->lock_door(dev, 0);
|
| 177 |
|
|
cdo->release(dev);
|
| 178 |
|
|
if (cdo->open_files(dev) == 0) { /* last process that closes dev */
|
| 179 |
|
|
sync_dev(dev);
|
| 180 |
|
|
invalidate_buffers(dev);
|
| 181 |
|
|
if (cdo->options & CDO_AUTO_EJECT &&
|
| 182 |
|
|
cdo->capability & ~cdo->mask & CDC_OPEN_TRAY)
|
| 183 |
|
|
cdo->tray_move(dev, 1);
|
| 184 |
|
|
}
|
| 185 |
|
|
}
|
| 186 |
|
|
|
| 187 |
|
|
/* We want to make media_changed accessible to the user through an
|
| 188 |
|
|
* ioctl. The main problem now is that we must double-buffer the
|
| 189 |
|
|
* low-level implementation, to assure that the VFS and the user both
|
| 190 |
|
|
* see a medium change once.
|
| 191 |
|
|
*
|
| 192 |
|
|
* For now, i've implemented only 16 minor devs (half a long), i have to
|
| 193 |
|
|
* think of a better solution... $Queue$ is either 0 or 1. Queue 0 is
|
| 194 |
|
|
* in the lower 16 bits, queue 1 in the higher 16 bits.
|
| 195 |
|
|
*/
|
| 196 |
|
|
|
| 197 |
|
|
int media_changed(kdev_t dev, int queue)
|
| 198 |
|
|
{
|
| 199 |
|
|
unsigned int major = MAJOR(dev);
|
| 200 |
|
|
unsigned int minor = MINOR(dev);
|
| 201 |
|
|
struct cdrom_device_ops *cdo = cdromdevs[major];
|
| 202 |
|
|
int ret;
|
| 203 |
|
|
unsigned long mask = 1 << (16 * queue + minor);
|
| 204 |
|
|
|
| 205 |
|
|
queue &= 1;
|
| 206 |
|
|
if (cdo == NULL || minor >= 16)
|
| 207 |
|
|
return -1;
|
| 208 |
|
|
ret = !!(cdo->mc_flags & mask); /* changed since last call? */
|
| 209 |
|
|
if (cdo->media_changed(dev)) {
|
| 210 |
|
|
cdo->mc_flags |= 0x10001 << minor; /* set bit on both queues */
|
| 211 |
|
|
ret |= 1;
|
| 212 |
|
|
}
|
| 213 |
|
|
cdo->mc_flags &= ~mask; /* clear bit */
|
| 214 |
|
|
return ret;
|
| 215 |
|
|
}
|
| 216 |
|
|
|
| 217 |
|
|
int cdrom_media_changed(kdev_t dev)
|
| 218 |
|
|
{
|
| 219 |
|
|
struct cdrom_device_ops *cdo = cdromdevs[MAJOR(dev)];
|
| 220 |
|
|
if (cdo == NULL || MINOR(dev) >= cdo->minors)
|
| 221 |
|
|
return -ENODEV;
|
| 222 |
|
|
if (cdo->media_changed == NULL)
|
| 223 |
|
|
return -EINVAL;
|
| 224 |
|
|
return media_changed(dev, 0);
|
| 225 |
|
|
}
|
| 226 |
|
|
|
| 227 |
|
|
/* Requests to the low-level drivers will /always/ be done in the
|
| 228 |
|
|
following format convention:
|
| 229 |
|
|
|
| 230 |
|
|
CDROM_LBA: all data-related requests.
|
| 231 |
|
|
CDROM_MSF: all audio-related requests.
|
| 232 |
|
|
|
| 233 |
|
|
However, a low-level implementation is allowed to refuse this
|
| 234 |
|
|
request, and return information in its own favorite format.
|
| 235 |
|
|
|
| 236 |
|
|
It doesn't make sense /at all/ to ask for a play_audio in LBA
|
| 237 |
|
|
format, or ask for multi-session info in MSF format. However, for
|
| 238 |
|
|
backward compatibility these format requests will be satisfied, but
|
| 239 |
|
|
the requests to the low-level drivers will be sanitized in the more
|
| 240 |
|
|
meaningful format indicated above.
|
| 241 |
|
|
*/
|
| 242 |
|
|
|
| 243 |
|
|
#undef current /* set in sched.h */
|
| 244 |
|
|
|
| 245 |
|
|
void sanitize_format(union cdrom_addr *addr,
|
| 246 |
|
|
u_char * current, u_char requested)
|
| 247 |
|
|
{
|
| 248 |
|
|
if (*current == requested)
|
| 249 |
|
|
return; /* nothing to be done! */
|
| 250 |
|
|
if (requested == CDROM_LBA) {
|
| 251 |
|
|
addr->lba = (int) addr->msf.frame +
|
| 252 |
|
|
75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
|
| 253 |
|
|
} else { /* CDROM_MSF */
|
| 254 |
|
|
int lba = addr->lba;
|
| 255 |
|
|
addr->msf.frame = lba % 75;
|
| 256 |
|
|
lba /= 75;
|
| 257 |
|
|
lba += 2;
|
| 258 |
|
|
addr->msf.second = lba % 60;
|
| 259 |
|
|
addr->msf.minute = lba / 60;
|
| 260 |
|
|
}
|
| 261 |
|
|
*current = requested;
|
| 262 |
|
|
}
|
| 263 |
|
|
|
| 264 |
|
|
/* All checking and format change makes this code really hard to read!
|
| 265 |
|
|
* So let's make some check and memory move macros. These macros are
|
| 266 |
|
|
* a little inefficient when both used in the same piece of code, as
|
| 267 |
|
|
* verify_area is used twice, but who cares, as ioctl() calls
|
| 268 |
|
|
* shouldn't be in inner loops.
|
| 269 |
|
|
*/
|
| 270 |
|
|
#define GETARG(type, x) { \
|
| 271 |
|
|
int ret=verify_area(VERIFY_READ, (void *) arg, sizeof x); \
|
| 272 |
|
|
if (ret) return ret; \
|
| 273 |
|
|
memcpy_fromfs(&x, (type *) arg, sizeof x); }
|
| 274 |
|
|
#define PUTARG(type, x) { \
|
| 275 |
|
|
int ret=verify_area(VERIFY_WRITE, (void *) arg, sizeof x); \
|
| 276 |
|
|
if (ret) return ret; \
|
| 277 |
|
|
memcpy_tofs((type *) arg, &x, sizeof x); }
|
| 278 |
|
|
|
| 279 |
|
|
/* Some of the cdrom ioctls are not implemented here, because these
|
| 280 |
|
|
* appear to be either too device-specific, or it is not clear to me
|
| 281 |
|
|
* what use they are. These are (number of drivers that support them
|
| 282 |
|
|
* in parenthesis): CDROMREADMODE1 (2+ide), CDROMREADMODE2 (2+ide),
|
| 283 |
|
|
* CDROMREADAUDIO (2+ide), CDROMREADRAW (2), CDROMREADCOOKED (2),
|
| 284 |
|
|
* CDROMSEEK (2), CDROMPLAYBLK (scsi), CDROMREADALL (1). Read-audio,
|
| 285 |
|
|
* OK (although i guess the record companies aren't too happy with
|
| 286 |
|
|
* this, most drives therefore refuse to transport audio data). But
|
| 287 |
|
|
* why are there 5 different READs defined? For now, these functions
|
| 288 |
|
|
* are left over to the device-specific ioctl routine,
|
| 289 |
|
|
* cdo->dev_ioctl. Note that as a result of this, no
|
| 290 |
|
|
* memory-verification is performed for these ioctls.
|
| 291 |
|
|
*/
|
| 292 |
|
|
int cdrom_ioctl(struct inode *ip, struct file *fp,
|
| 293 |
|
|
unsigned int cmd, unsigned long arg)
|
| 294 |
|
|
{
|
| 295 |
|
|
kdev_t dev = ip->i_rdev;
|
| 296 |
|
|
struct cdrom_device_ops *cdo = cdromdevs[MAJOR(dev)];
|
| 297 |
|
|
|
| 298 |
|
|
if (cdo == NULL || MINOR(dev) >= cdo->minors)
|
| 299 |
|
|
return -ENODEV;
|
| 300 |
|
|
/* the first few commands do not deal with audio capabilities, but
|
| 301 |
|
|
only with routines in cdrom device operations. */
|
| 302 |
|
|
switch (cmd) {
|
| 303 |
|
|
/* maybe we should order cases after statistics of use? */
|
| 304 |
|
|
|
| 305 |
|
|
case CDROMMULTISESSION:
|
| 306 |
|
|
{
|
| 307 |
|
|
struct cdrom_multisession ms_info;
|
| 308 |
|
|
u_char requested_format;
|
| 309 |
|
|
if (!(cdo->capability & CDC_MULTI_SESSION))
|
| 310 |
|
|
return -EINVAL;
|
| 311 |
|
|
GETARG(struct cdrom_multisession, ms_info);
|
| 312 |
|
|
requested_format = ms_info.addr_format;
|
| 313 |
|
|
ms_info.addr_format = CDROM_LBA;
|
| 314 |
|
|
cdo->get_last_session(dev, &ms_info);
|
| 315 |
|
|
sanitize_format(&ms_info.addr, &ms_info.addr_format,
|
| 316 |
|
|
requested_format);
|
| 317 |
|
|
PUTARG(struct cdrom_multisession, ms_info);
|
| 318 |
|
|
return 0;
|
| 319 |
|
|
}
|
| 320 |
|
|
|
| 321 |
|
|
case CDROMEJECT:
|
| 322 |
|
|
if (cdo->open_files(dev) == 1 &&
|
| 323 |
|
|
cdo->capability & ~cdo->mask & CDC_OPEN_TRAY)
|
| 324 |
|
|
return cdo->tray_move(dev, 1);
|
| 325 |
|
|
else
|
| 326 |
|
|
return -EINVAL;
|
| 327 |
|
|
|
| 328 |
|
|
case CDROMCLOSETRAY:
|
| 329 |
|
|
if (cdo->open_files(dev) == 1 &&
|
| 330 |
|
|
cdo->capability & ~cdo->mask & CDC_CLOSE_TRAY)
|
| 331 |
|
|
return cdo->tray_move(dev, 0);
|
| 332 |
|
|
else
|
| 333 |
|
|
return -EINVAL;
|
| 334 |
|
|
|
| 335 |
|
|
case CDROMEJECT_SW:
|
| 336 |
|
|
cdo->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
|
| 337 |
|
|
if (arg)
|
| 338 |
|
|
cdo->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
|
| 339 |
|
|
return 0;
|
| 340 |
|
|
|
| 341 |
|
|
case CDROM_MEDIA_CHANGED:
|
| 342 |
|
|
if (cdo->capability & ~cdo->mask & CDC_MEDIA_CHANGED)
|
| 343 |
|
|
return media_changed(dev, 1);
|
| 344 |
|
|
else
|
| 345 |
|
|
return -EINVAL;
|
| 346 |
|
|
|
| 347 |
|
|
case CDROM_SET_OPTIONS:
|
| 348 |
|
|
cdo->options |= (int) arg;
|
| 349 |
|
|
return cdo->options;
|
| 350 |
|
|
|
| 351 |
|
|
case CDROM_CLEAR_OPTIONS:
|
| 352 |
|
|
cdo->options &= ~(int) arg;
|
| 353 |
|
|
return cdo->options;
|
| 354 |
|
|
|
| 355 |
|
|
case CDROM_SELECT_SPEED:
|
| 356 |
|
|
if (0 <= arg && arg <= cdo->speed &&
|
| 357 |
|
|
cdo->capability & ~cdo->mask & CDC_SELECT_SPEED)
|
| 358 |
|
|
return cdo->select_speed(dev, arg);
|
| 359 |
|
|
else
|
| 360 |
|
|
return -EINVAL;
|
| 361 |
|
|
|
| 362 |
|
|
case CDROM_SELECT_DISC:
|
| 363 |
|
|
if (0 <= arg && arg <= cdo->capacity &&
|
| 364 |
|
|
cdo->capability & ~cdo->mask & CDC_SELECT_DISC)
|
| 365 |
|
|
return cdo->select_disc(dev, arg);
|
| 366 |
|
|
else
|
| 367 |
|
|
return -EINVAL;
|
| 368 |
|
|
|
| 369 |
|
|
/* The following function is implemented, although very few audio
|
| 370 |
|
|
* discs give Universal Product Code information, which should just be
|
| 371 |
|
|
* the Medium Catalog Number on the box. Note, that the way the code
|
| 372 |
|
|
* is written on the CD is /not/ uniform across all discs!
|
| 373 |
|
|
*/
|
| 374 |
|
|
case CDROM_GET_MCN: {
|
| 375 |
|
|
struct cdrom_mcn mcn;
|
| 376 |
|
|
if (!(cdo->capability & CDC_MCN))
|
| 377 |
|
|
return -EINVAL;
|
| 378 |
|
|
if (!cdo->get_mcn(dev, &mcn)) {
|
| 379 |
|
|
PUTARG(struct cdrom_mcn, mcn);
|
| 380 |
|
|
return 0;
|
| 381 |
|
|
}
|
| 382 |
|
|
return -EINVAL;
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
case CDROM_DRIVE_STATUS:
|
| 386 |
|
|
if (cdo->drive_status == NULL)
|
| 387 |
|
|
return -EINVAL;
|
| 388 |
|
|
else
|
| 389 |
|
|
return cdo->drive_status(dev);
|
| 390 |
|
|
|
| 391 |
|
|
case CDROM_DISC_STATUS:
|
| 392 |
|
|
if (cdo->disc_status == NULL)
|
| 393 |
|
|
return -EINVAL;
|
| 394 |
|
|
else
|
| 395 |
|
|
return cdo->disc_status(dev);
|
| 396 |
|
|
|
| 397 |
|
|
/* The following is not implemented, because there are too many
|
| 398 |
|
|
* different data type. We could support /1/ raw mode, that is large
|
| 399 |
|
|
* enough to hold everything.
|
| 400 |
|
|
*/
|
| 401 |
|
|
|
| 402 |
|
|
#if 0
|
| 403 |
|
|
case CDROMREADMODE1: {
|
| 404 |
|
|
struct cdrom_msf msf;
|
| 405 |
|
|
char buf[CD_FRAMESIZE];
|
| 406 |
|
|
GETARG(struct cdrom_msf, msf);
|
| 407 |
|
|
if (!cdo->read_audio(dev, cmd, &msf, &buf)) {
|
| 408 |
|
|
PUTARG(char *, buf);
|
| 409 |
|
|
return 0;
|
| 410 |
|
|
}
|
| 411 |
|
|
return -EINVAL;
|
| 412 |
|
|
}
|
| 413 |
|
|
#endif
|
| 414 |
|
|
} /* switch */
|
| 415 |
|
|
|
| 416 |
|
|
/* Now all the audio-ioctls follow, they are all routed through the
|
| 417 |
|
|
same call audio_ioctl(). */
|
| 418 |
|
|
|
| 419 |
|
|
if (cdo->capability & CDC_PLAY_AUDIO)
|
| 420 |
|
|
switch (cmd) {
|
| 421 |
|
|
case CDROMSUBCHNL:
|
| 422 |
|
|
{
|
| 423 |
|
|
struct cdrom_subchnl q;
|
| 424 |
|
|
u_char requested, back;
|
| 425 |
|
|
GETARG(struct cdrom_subchnl, q);
|
| 426 |
|
|
requested = q.cdsc_format;
|
| 427 |
|
|
q.cdsc_format = CDROM_MSF;
|
| 428 |
|
|
if (!cdo->audio_ioctl(dev, cmd, &q)) {
|
| 429 |
|
|
back = q.cdsc_format; /* local copy */
|
| 430 |
|
|
sanitize_format(&q.cdsc_absaddr, &back, requested);
|
| 431 |
|
|
sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
|
| 432 |
|
|
PUTARG(struct cdrom_subchnl, q);
|
| 433 |
|
|
return 0;
|
| 434 |
|
|
} else
|
| 435 |
|
|
return -EINVAL;
|
| 436 |
|
|
}
|
| 437 |
|
|
case CDROMREADTOCHDR: {
|
| 438 |
|
|
struct cdrom_tochdr header;
|
| 439 |
|
|
GETARG(struct cdrom_tochdr, header);
|
| 440 |
|
|
if (!cdo->audio_ioctl(dev, cmd, &header)) {
|
| 441 |
|
|
PUTARG(struct cdrom_tochdr, header);
|
| 442 |
|
|
return 0;
|
| 443 |
|
|
} else
|
| 444 |
|
|
return -EINVAL;
|
| 445 |
|
|
}
|
| 446 |
|
|
case CDROMREADTOCENTRY: {
|
| 447 |
|
|
struct cdrom_tocentry entry;
|
| 448 |
|
|
u_char requested_format;
|
| 449 |
|
|
GETARG(struct cdrom_tocentry, entry);
|
| 450 |
|
|
requested_format = entry.cdte_format;
|
| 451 |
|
|
/* make interface to low-level uniform */
|
| 452 |
|
|
entry.cdte_format = CDROM_MSF;
|
| 453 |
|
|
if (!(cdo->audio_ioctl(dev, cmd, &entry))) {
|
| 454 |
|
|
sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
|
| 455 |
|
|
PUTARG(struct cdrom_tocentry, entry);
|
| 456 |
|
|
return 0;
|
| 457 |
|
|
} else
|
| 458 |
|
|
return -EINVAL;
|
| 459 |
|
|
}
|
| 460 |
|
|
case CDROMPLAYMSF: {
|
| 461 |
|
|
struct cdrom_msf msf;
|
| 462 |
|
|
GETARG(struct cdrom_msf, msf);
|
| 463 |
|
|
return cdo->audio_ioctl(dev, cmd, &msf);
|
| 464 |
|
|
}
|
| 465 |
|
|
case CDROMPLAYTRKIND: {
|
| 466 |
|
|
struct cdrom_ti track_index;
|
| 467 |
|
|
GETARG(struct cdrom_ti, track_index);
|
| 468 |
|
|
return cdo->audio_ioctl(dev, cmd, &track_index);
|
| 469 |
|
|
}
|
| 470 |
|
|
case CDROMVOLCTRL: {
|
| 471 |
|
|
struct cdrom_volctrl volume;
|
| 472 |
|
|
GETARG(struct cdrom_volctrl, volume);
|
| 473 |
|
|
return cdo->audio_ioctl(dev, cmd, &volume);
|
| 474 |
|
|
}
|
| 475 |
|
|
case CDROMVOLREAD: {
|
| 476 |
|
|
struct cdrom_volctrl volume;
|
| 477 |
|
|
if (!cdo->audio_ioctl(dev, cmd, &volume)) {
|
| 478 |
|
|
PUTARG(struct cdrom_volctrl, volume);
|
| 479 |
|
|
return 0;
|
| 480 |
|
|
}
|
| 481 |
|
|
return -EINVAL;
|
| 482 |
|
|
}
|
| 483 |
|
|
case CDROMSTART:
|
| 484 |
|
|
case CDROMSTOP:
|
| 485 |
|
|
case CDROMPAUSE:
|
| 486 |
|
|
case CDROMRESUME:
|
| 487 |
|
|
return cdo->audio_ioctl(dev, cmd, NULL);
|
| 488 |
|
|
} /* switch */
|
| 489 |
|
|
|
| 490 |
|
|
if (cdo->dev_ioctl != NULL) /* device specific ioctls? */
|
| 491 |
|
|
return cdo->dev_ioctl(dev, cmd, arg);
|
| 492 |
|
|
return -EINVAL;
|
| 493 |
|
|
}
|
| 494 |
|
|
|
| 495 |
|
|
#ifdef MODULE
|
| 496 |
|
|
int init_module(void)
|
| 497 |
|
|
{
|
| 498 |
|
|
printk(KERN_INFO "Module inserted " VERSION "\n");
|
| 499 |
|
|
return 0;
|
| 500 |
|
|
}
|
| 501 |
|
|
|
| 502 |
|
|
void cleanup_module(void)
|
| 503 |
|
|
{
|
| 504 |
|
|
printk(KERN_INFO "Module cdrom removed\n");
|
| 505 |
|
|
}
|
| 506 |
|
|
|
| 507 |
|
|
#endif
|
| 508 |
|
|
/*
|
| 509 |
|
|
* Local variables:
|
| 510 |
|
|
* comment-column: 40
|
| 511 |
|
|
* compile-command: "gcc -DMODULE -D__KERNEL__ -I/usr/src/linux-obj/include -Wall -Wstrict-prototypes -O2 -m486 -c cdrom.c -o cdrom.o"
|
| 512 |
|
|
* End:
|
| 513 |
|
|
*/
|
