/*
* Open the device special file. Check that a disk is in.
*/
static int mcd_open(struct cdrom_device_info * cdi, int purpose)
{
int st, count=0;
if (mcdPresent == 0)
return -ENXIO; /* no hardware */
if (!mcd_open_count && mcd_state == MCD_S_IDLE) {
mcd_invalidate_buffers();
do {
st = statusCmd(); /* check drive status */
if (st == -1)
return -EIO; /* drive doesn't respond */
if ((st & MST_READY) == 0) { /* no disk? wait a sec... */
current->state = TASK_INTERRUPTIBLE;
schedule_timeout(HZ);
}
} while (((st & MST_READY) == 0) && count++ < MCD_RETRY_ATTEMPTS);
if (updateToc() < 0)
return -EIO;
}
++mcd_open_count;
MOD_INC_USE_COUNT;
return 0;
}
/*
* Open the device special file. Check that a disk is in.
*/
static int mcd_open(struct cdrom_device_info *cdi, int purpose)
{
int st, count = 0;
if (mcdPresent == 0)
return -ENXIO; /* no hardware */
if (mcd_open_count || mcd_state != MCD_S_IDLE)
goto bump_count;
mcd_invalidate_buffers();
do {
st = statusCmd(); /* check drive status */
if (st == -1)
goto err_out; /* drive doesn't respond */
if ((st & MST_READY) == 0) /* no disk? wait a sec... */
msleep(1000);
} while (((st & MST_READY) == 0) && count++ < MCD_RETRY_ATTEMPTS);
if (updateToc() < 0)
goto err_out;
bump_count:
++mcd_open_count;
return 0;
err_out:
return -EIO;
}
static void
mcd_release(struct inode * inode, struct file * file)
{ MOD_DEC_USE_COUNT;
if (!--mcd_open_count) {
mcd_invalidate_buffers();
sync_dev(inode->i_rdev);
invalidate_buffers(inode -> i_rdev);
}
}
int
mcd_open(struct inode *ip, struct file *fp)
{
int st;
int count = 0;
if (mcdPresent == 0)
return -ENXIO; /* no hardware */
if (fp->f_mode & 2) /* write access? */
return -EROFS;
if (!mcd_open_count && mcd_state == MCD_S_IDLE) {
mcd_invalidate_buffers();
do {
st = statusCmd(); /* check drive status */
if (st == -1)
return -EIO; /* drive doesn't respond */
if ((st & MST_READY) == 0) { /* no disk? wait a sec... */
current->state = TASK_INTERRUPTIBLE;
current->timeout = jiffies + HZ;
schedule();
}
} while (((st & MST_READY) == 0) && count++ < MCD_RETRY_ATTEMPTS);
if ((st & MST_READY) == 0) /* no disk in drive */
{
printk("mcd: no disk in drive\n");
return -EIO;
}
if (updateToc() < 0)
return -EIO;
}
++mcd_open_count;
MOD_INC_USE_COUNT;
return 0;
}
static void
mcd_poll(void)
{
int st;
if (mcd_error)
{
if (mcd_error & 0xA5)
{
printk("mcd: I/O error 0x%02x", mcd_error);
if (mcd_error & 0x80)
printk(" (Door open)");
if (mcd_error & 0x20)
printk(" (Disk changed)");
if (mcd_error & 0x04)
{
printk(" (Read error)"); /* Bitch about the problem. */
/* Time to get fancy! If at 2x speed and 1 error, drop to 1x speed! */
/* Interesting how it STAYS at MCD_RETRY_ATTEMPTS on first error! */
/* But I find that rather HANDY!!! */
/* Neat! it REALLY WORKS on those LOW QUALITY CD's!!! Smile! :) */
/* AJK [06/17/95] */
/* Slap the CD down to single speed! */
if (mcdDouble == 1 && McdTries == MCD_RETRY_ATTEMPTS && MCMD_DATA_READ == MCMD_2X_READ)
{
MCMD_DATA_READ = MCMD_PLAY_READ; /* Uhhh, Ummmm, muhuh-huh! */
mcd1xhold = SINGLE_HOLD_SECTORS; /* Hey Beavis! */
printk(" Speed now 1x"); /* Pull my finger! */
}
}
printk("\n");
mcd_invalidate_buffers();
#ifdef WARN_IF_READ_FAILURE
if (McdTries == MCD_RETRY_ATTEMPTS)
printk("mcd: read of block %d failed\n", mcd_next_bn);
#endif
if (!McdTries--)
{
/* Nuts! This cd is ready for recycling! */
/* When WAS the last time YOU cleaned it CORRECTLY?! */
printk("mcd: read of block %d failed, giving up\n", mcd_next_bn);
if (mcd_transfer_is_active)
{
McdTries = 0;
goto ret;
}
if (CURRENT_VALID)
end_request(0);
McdTries = MCD_RETRY_ATTEMPTS;
}
}
mcd_error = 0;
mcd_state = MCD_S_STOP;
}
/* Switch back to Double speed if enough GOOD sectors were read! */
/* Are we a double speed with a crappy CD?! */
if (mcdDouble == 1 && McdTries == MCD_RETRY_ATTEMPTS && MCMD_DATA_READ == MCMD_PLAY_READ)
{
/* We ARE a double speed and we ARE bitching! */
if (mcd1xhold == 0) /* Okay, Like are we STILL at single speed? */
{ /* We need to switch back to double speed now... */
MCMD_DATA_READ = MCMD_2X_READ; /* Uhhh... BACK You GO! */
printk("mcd: Switching back to 2X speed!\n"); /* Tell 'em! */
}
else mcd1xhold--; /* No?! Count down the good reads some more... */
/* and try, try again! */
}
immediately:
switch (mcd_state) {
case MCD_S_IDLE:
#ifdef TEST3
printk("MCD_S_IDLE\n");
#endif
return;
case MCD_S_START:
#ifdef TEST3
printk("MCD_S_START\n");
#endif
outb(MCMD_GET_STATUS, MCDPORT(0));
mcd_state = mcd_mode == 1 ? MCD_S_READ : MCD_S_MODE;
McdTimeout = 3000;
break;
case MCD_S_MODE:
#ifdef TEST3
printk("MCD_S_MODE\n");
#endif
if ((st = mcdStatus()) != -1) {
if (st & MST_DSK_CHG) {
mcdDiskChanged = 1;
tocUpToDate = 0;
mcd_invalidate_buffers();
}
set_mode_immediately:
if ((st & MST_DOOR_OPEN) || !(st & MST_READY)) {
mcdDiskChanged = 1;
tocUpToDate = 0;
if (mcd_transfer_is_active) {
mcd_state = MCD_S_START;
goto immediately;
}
printk((st & MST_DOOR_OPEN) ? "mcd: door open\n" : "mcd: disk removed\n");
mcd_state = MCD_S_IDLE;
while (CURRENT_VALID)
end_request(0);
return;
}
outb(MCMD_SET_MODE, MCDPORT(0));
outb(1, MCDPORT(0));
mcd_mode = 1;
mcd_state = MCD_S_READ;
McdTimeout = 3000;
}
break;
case MCD_S_READ:
#ifdef TEST3
printk("MCD_S_READ\n");
#endif
if ((st = mcdStatus()) != -1) {
if (st & MST_DSK_CHG) {
mcdDiskChanged = 1;
tocUpToDate = 0;
mcd_invalidate_buffers();
}
read_immediately:
if ((st & MST_DOOR_OPEN) || !(st & MST_READY)) {
mcdDiskChanged = 1;
tocUpToDate = 0;
if (mcd_transfer_is_active) {
mcd_state = MCD_S_START;
goto immediately;
}
printk((st & MST_DOOR_OPEN) ? "mcd: door open\n" : "mcd: disk removed\n");
mcd_state = MCD_S_IDLE;
while (CURRENT_VALID)
end_request(0);
return;
}
if (CURRENT_VALID) {
struct mcd_Play_msf msf;
mcd_next_bn = CURRENT -> sector / 4;
hsg2msf(mcd_next_bn, &msf.start);
msf.end.min = ~0;
msf.end.sec = ~0;
msf.end.frame = ~0;
sendMcdCmd(MCMD_DATA_READ, &msf);
mcd_state = MCD_S_DATA;
McdTimeout = READ_TIMEOUT;
} else {
mcd_state = MCD_S_STOP;
goto immediately;
}
}
break;
case MCD_S_DATA:
#ifdef TEST3
printk("MCD_S_DATA\n");
#endif
st = inb(MCDPORT(1)) & (MFL_STATUSorDATA);
data_immediately:
#ifdef TEST5
printk("Status %02x\n",st);
#endif
switch (st) {
case MFL_DATA:
#ifdef WARN_IF_READ_FAILURE
if (McdTries == 5)
printk("mcd: read of block %d failed\n", mcd_next_bn);
#endif
if (!McdTries--) {
printk("mcd: read of block %d failed, giving up\n", mcd_next_bn);
if (mcd_transfer_is_active) {
McdTries = 0;
break;
}
if (CURRENT_VALID)
end_request(0);
McdTries = 5;
}
mcd_state = MCD_S_START;
McdTimeout = READ_TIMEOUT;
goto immediately;
case MFL_STATUSorDATA:
break;
default:
McdTries = 5;
if (!CURRENT_VALID && mcd_buf_in == mcd_buf_out) {
mcd_state = MCD_S_STOP;
goto immediately;
}
mcd_buf_bn[mcd_buf_in] = -1;
READ_DATA(MCDPORT(0), mcd_buf + 2048 * mcd_buf_in, 2048);
mcd_buf_bn[mcd_buf_in] = mcd_next_bn++;
if (mcd_buf_out == -1)
mcd_buf_out = mcd_buf_in;
mcd_buf_in = mcd_buf_in + 1 == MCD_BUF_SIZ ? 0 : mcd_buf_in + 1;
if (!mcd_transfer_is_active) {
while (CURRENT_VALID) {
mcd_transfer();
if (CURRENT -> nr_sectors == 0)
end_request(1);
else
break;
}
}
if (CURRENT_VALID
&& (CURRENT -> sector / 4 < mcd_next_bn ||
CURRENT -> sector / 4 > mcd_next_bn + 16)) {
mcd_state = MCD_S_STOP;
goto immediately;
}
McdTimeout = READ_TIMEOUT;
#ifdef DOUBLE_QUICK_ONLY
if (MCMD_DATA_READ != MCMD_PLAY_READ)
#endif
{
int count= QUICK_LOOP_COUNT;
while (count--) {
QUICK_LOOP_DELAY;
if ((st = (inb(MCDPORT(1))) & (MFL_STATUSorDATA)) != (MFL_STATUSorDATA)) {
# ifdef TEST4
/* printk("Quickloop success at %d\n",QUICK_LOOP_COUNT-count); */
printk(" %d ",QUICK_LOOP_COUNT-count);
# endif
goto data_immediately;
}
}
# ifdef TEST4
/* printk("Quickloop ended at %d\n",QUICK_LOOP_COUNT); */
printk("ended ");
# endif
}
break;
}
break;
case MCD_S_STOP:
#ifdef TEST3
printk("MCD_S_STOP\n");
#endif
#ifdef WORK_AROUND_MITSUMI_BUG_93
if (!mitsumi_bug_93_wait)
goto do_not_work_around_mitsumi_bug_93_1;
McdTimeout = mitsumi_bug_93_wait;
mcd_state = 9+3+1;
break;
case 9+3+1:
if (McdTimeout)
break;
do_not_work_around_mitsumi_bug_93_1:
#endif /* WORK_AROUND_MITSUMI_BUG_93 */
outb(MCMD_STOP, MCDPORT(0));
#ifdef WORK_AROUND_MITSUMI_BUG_92
if ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS) {
int i = 4096;
do {
inb(MCDPORT(0));
} while ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS && --i);
outb(MCMD_STOP, MCDPORT(0));
if ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS) {
i = 4096;
do {
inb(MCDPORT(0));
} while ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS && --i);
outb(MCMD_STOP, MCDPORT(0));
}
}
#endif /* WORK_AROUND_MITSUMI_BUG_92 */
mcd_state = MCD_S_STOPPING;
McdTimeout = 1000;
break;
case MCD_S_STOPPING:
#ifdef TEST3
printk("MCD_S_STOPPING\n");
#endif
if ((st = mcdStatus()) == -1 && McdTimeout)
break;
if ((st != -1) && (st & MST_DSK_CHG)) {
mcdDiskChanged = 1;
tocUpToDate = 0;
mcd_invalidate_buffers();
}
#ifdef WORK_AROUND_MITSUMI_BUG_93
if (!mitsumi_bug_93_wait)
goto do_not_work_around_mitsumi_bug_93_2;
McdTimeout = mitsumi_bug_93_wait;
mcd_state = 9+3+2;
break;
case 9+3+2:
if (McdTimeout)
break;
st = -1;
do_not_work_around_mitsumi_bug_93_2:
#endif /* WORK_AROUND_MITSUMI_BUG_93 */
#ifdef TEST3
printk("CURRENT_VALID %d mcd_mode %d\n",
CURRENT_VALID, mcd_mode);
#endif
if (CURRENT_VALID) {
if (st != -1) {
if (mcd_mode == 1)
goto read_immediately;
else
goto set_mode_immediately;
} else {
mcd_state = MCD_S_START;
McdTimeout = 1;
}
} else {
mcd_state = MCD_S_IDLE;
return;
}
break;
default:
printk("mcd: invalid state %d\n", mcd_state);
return;
}
ret:
if (!McdTimeout--) {
printk("mcd: timeout in state %d\n", mcd_state);
mcd_state = MCD_S_STOP;
}
SET_TIMER(mcd_poll, 1);
}
__initfunc(int mcd_init(void))
{
int count;
unsigned char result[3];
char msg[80];
if (mcd_port <= 0 || mcd_irq <= 0) {
printk("skip mcd_init\n");
return -EIO;
}
if (register_blkdev(MAJOR_NR, "mcd", &cdrom_fops) != 0)
{
printk("Unable to get major %d for Mitsumi CD-ROM\n",
MAJOR_NR);
return -EIO;
}
if (check_region(mcd_port, 4)) {
cleanup(1);
printk("Init failed, I/O port (%X) already in use\n",
mcd_port);
return -EIO;
}
blksize_size[MAJOR_NR] = mcd_blocksizes;
blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST;
read_ahead[MAJOR_NR] = 4;
/* check for card */
outb(0, MCDPORT(1)); /* send reset */
for (count = 0; count < 2000000; count++)
(void) inb(MCDPORT(1)); /* delay a bit */
outb(0x40, MCDPORT(0)); /* send get-stat cmd */
for (count = 0; count < 2000000; count++)
if (!(inb(MCDPORT(1)) & MFL_STATUS))
break;
if (count >= 2000000) {
printk("Init failed. No mcd device at 0x%x irq %d\n",
mcd_port, mcd_irq);
cleanup(1);
return -EIO;
}
count = inb(MCDPORT(0)); /* pick up the status */
outb(MCMD_GET_VERSION,MCDPORT(0));
for(count=0;count<3;count++)
if(getValue(result+count)) {
printk("mitsumi get version failed at 0x%d\n",
mcd_port);
cleanup(1);
return -EIO;
}
if (result[0] == result[1] && result[1] == result[2]) {
cleanup(1);
return -EIO;
}
mcdVersion=result[2];
if (mcdVersion >=4)
outb(4,MCDPORT(2)); /* magic happens */
/* don't get the IRQ until we know for sure the drive is there */
if (request_irq(mcd_irq, mcd_interrupt, SA_INTERRUPT, "Mitsumi CD", NULL))
{
printk("Unable to get IRQ%d for Mitsumi CD-ROM\n", mcd_irq);
cleanup(1);
return -EIO;
}
if (result[1] == 'D')
{
sprintf(msg, " mcd: Mitsumi Double Speed CD-ROM at port=0x%x,"
" irq=%d\n", mcd_port, mcd_irq);
MCMD_DATA_READ = MCMD_2X_READ;
mcd_info.speed = 2;
/* Added flag to drop to 1x speed if too many errors */
mcdDouble = 1;
} else {
sprintf(msg, " mcd: Mitsumi Single Speed CD-ROM at port=0x%x,"
" irq=%d\n", mcd_port, mcd_irq);
mcd_info.speed = 2;
}
request_region(mcd_port, 4, "mcd");
outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
outb(0x02,MCDPORT(0));
outb(0x00,MCDPORT(0));
getValue(result);
outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
outb(0x10,MCDPORT(0));
outb(0x04,MCDPORT(0));
getValue(result);
mcd_invalidate_buffers();
mcdPresent = 1;
mcd_info.dev = MKDEV(MAJOR_NR,0);
if (register_cdrom(&mcd_info) != 0) {
printk("Cannot register Mitsumi CD-ROM!\n");
cleanup(3);
return -EIO;
}
printk(msg);
return 0;
}
/*
* On close, we flush all mcd blocks from the buffer cache.
*/
static void mcd_release(struct cdrom_device_info * cdi)
{ MOD_DEC_USE_COUNT;
if (!--mcd_open_count) {
mcd_invalidate_buffers();
}
}
int __init mcd_init(void)
{
struct gendisk *disk = alloc_disk(1);
int count;
unsigned char result[3];
char msg[80];
if (!disk) {
printk(KERN_INFO "mcd: can't allocated disk.\n");
return -ENOMEM;
}
if (mcd_port <= 0 || mcd_irq <= 0) {
printk(KERN_INFO "mcd: not probing.\n");
put_disk(disk);
return -EIO;
}
if (register_blkdev(MAJOR_NR, "mcd")) {
put_disk(disk);
return -EIO;
}
if (!request_region(mcd_port, 4, "mcd")) {
printk(KERN_ERR "mcd: Initialization failed, I/O port (%X) already in use\n", mcd_port);
goto out_region;
}
mcd_queue = blk_init_queue(do_mcd_request, &mcd_spinlock);
if (!mcd_queue)
goto out_queue;
/* check for card */
outb(0, MCDPORT(1)); /* send reset */
for (count = 0; count < 2000000; count++)
(void) inb(MCDPORT(1)); /* delay a bit */
outb(0x40, MCDPORT(0)); /* send get-stat cmd */
for (count = 0; count < 2000000; count++)
if (!(inb(MCDPORT(1)) & MFL_STATUS))
break;
if (count >= 2000000) {
printk(KERN_INFO "mcd: initialisation failed - No mcd device at 0x%x irq %d\n",
mcd_port, mcd_irq);
goto out_probe;
}
count = inb(MCDPORT(0)); /* pick up the status */
outb(MCMD_GET_VERSION, MCDPORT(0));
for (count = 0; count < 3; count++)
if (getValue(result + count)) {
printk(KERN_ERR "mcd: mitsumi get version failed at 0x%x\n",
mcd_port);
goto out_probe;
}
if (result[0] == result[1] && result[1] == result[2])
goto out_probe;
mcdVersion = result[2];
if (mcdVersion >= 4)
outb(4, MCDPORT(2)); /* magic happens */
/* don't get the IRQ until we know for sure the drive is there */
if (request_irq(mcd_irq, mcd_interrupt, SA_INTERRUPT, "Mitsumi CD", NULL)) {
printk(KERN_ERR "mcd: Unable to get IRQ%d for Mitsumi CD-ROM\n", mcd_irq);
goto out_probe;
}
if (result[1] == 'D') {
MCMD_DATA_READ = MCMD_2X_READ;
/* Added flag to drop to 1x speed if too many errors */
mcdDouble = 1;
} else
mcd_info.speed = 1;
sprintf(msg, " mcd: Mitsumi %s Speed CD-ROM at port=0x%x,"
" irq=%d\n", mcd_info.speed == 1 ? "Single" : "Double",
mcd_port, mcd_irq);
outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
outb(0x02, MCDPORT(0));
outb(0x00, MCDPORT(0));
getValue(result);
outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
outb(0x10, MCDPORT(0));
outb(0x04, MCDPORT(0));
getValue(result);
mcd_invalidate_buffers();
mcdPresent = 1;
disk->major = MAJOR_NR;
disk->first_minor = 0;
sprintf(disk->disk_name, "mcd");
disk->fops = &mcd_bdops;
disk->flags = GENHD_FL_CD;
mcd_gendisk = disk;
if (register_cdrom(&mcd_info) != 0) {
printk(KERN_ERR "mcd: Unable to register Mitsumi CD-ROM.\n");
goto out_cdrom;
}
disk->queue = mcd_queue;
add_disk(disk);
printk(msg);
return 0;
out_cdrom:
free_irq(mcd_irq, NULL);
out_queue:
release_region(mcd_port, 4);
out_probe:
blk_cleanup_queue(mcd_queue);
out_region:
unregister_blkdev(MAJOR_NR, "mcd");
put_disk(disk);
return -EIO;
}
int __init mcd_init(void)
{
int count;
unsigned char result[3];
char msg[80];
if (mcd_port <= 0 || mcd_irq <= 0) {
printk(KERN_INFO "mcd: not probing.\n");
return -EIO;
}
if (devfs_register_blkdev(MAJOR_NR, "mcd", &mcd_bdops) != 0) {
printk(KERN_ERR "mcd: Unable to get major %d for Mitsumi CD-ROM\n", MAJOR_NR);
return -EIO;
}
if (check_region(mcd_port, 4)) {
cleanup(1);
printk(KERN_ERR "mcd: Initialization failed, I/O port (%X) already in use\n", mcd_port);
return -EIO;
}
blksize_size[MAJOR_NR] = mcd_blocksizes;
blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), DEVICE_REQUEST,
&mcd_spinlock);
read_ahead[MAJOR_NR] = 4;
/* check for card */
outb(0, MCDPORT(1)); /* send reset */
for (count = 0; count < 2000000; count++)
(void) inb(MCDPORT(1)); /* delay a bit */
outb(0x40, MCDPORT(0)); /* send get-stat cmd */
for (count = 0; count < 2000000; count++)
if (!(inb(MCDPORT(1)) & MFL_STATUS))
break;
if (count >= 2000000) {
printk(KERN_INFO "mcd: initialisation failed - No mcd device at 0x%x irq %d\n",
mcd_port, mcd_irq);
cleanup(1);
return -EIO;
}
count = inb(MCDPORT(0)); /* pick up the status */
outb(MCMD_GET_VERSION, MCDPORT(0));
for (count = 0; count < 3; count++)
if (getValue(result + count)) {
printk(KERN_ERR "mcd: mitsumi get version failed at 0x%x\n",
mcd_port);
cleanup(1);
return -EIO;
}
if (result[0] == result[1] && result[1] == result[2]) {
cleanup(1);
return -EIO;
}
mcdVersion = result[2];
if (mcdVersion >= 4)
outb(4, MCDPORT(2)); /* magic happens */
/* don't get the IRQ until we know for sure the drive is there */
if (request_irq(mcd_irq, mcd_interrupt, SA_INTERRUPT, "Mitsumi CD", NULL)) {
printk(KERN_ERR "mcd: Unable to get IRQ%d for Mitsumi CD-ROM\n", mcd_irq);
cleanup(1);
return -EIO;
}
if (result[1] == 'D') {
MCMD_DATA_READ = MCMD_2X_READ;
/* Added flag to drop to 1x speed if too many errors */
mcdDouble = 1;
} else
mcd_info.speed = 1;
sprintf(msg, " mcd: Mitsumi %s Speed CD-ROM at port=0x%x,"
" irq=%d\n", mcd_info.speed == 1 ? "Single" : "Double",
mcd_port, mcd_irq);
request_region(mcd_port, 4, "mcd");
outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
outb(0x02, MCDPORT(0));
outb(0x00, MCDPORT(0));
getValue(result);
outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
outb(0x10, MCDPORT(0));
outb(0x04, MCDPORT(0));
getValue(result);
mcd_invalidate_buffers();
mcdPresent = 1;
mcd_info.dev = mk_kdev(MAJOR_NR, 0);
if (register_cdrom(&mcd_info) != 0) {
printk(KERN_ERR "mcd: Unable to register Mitsumi CD-ROM.\n");
cleanup(3);
return -EIO;
}
devfs_plain_cdrom(&mcd_info, &mcd_bdops);
printk(msg);
return 0;
}
