/* n_hdlc_tty_ioctl()
*
* Process IOCTL system call for the tty device.
*
* Arguments:
*
* tty pointer to tty instance data
* file pointer to open file object for device
* cmd IOCTL command code
* arg argument for IOCTL call (cmd dependent)
*
* Return Value: Command dependent
*/
static int n_hdlc_tty_ioctl (struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg)
{
struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
int error = 0;
int count;
unsigned long flags;
if (debuglevel >= DEBUG_LEVEL_INFO)
printk("%s(%d)n_hdlc_tty_ioctl() called %d\n",
__FILE__,__LINE__,cmd);
/* Verify the status of the device */
if (!n_hdlc || n_hdlc->magic != HDLC_MAGIC)
return -EBADF;
switch (cmd) {
case FIONREAD:
/* report count of read data available */
/* in next available frame (if any) */
spin_lock_irqsave(&n_hdlc->rx_buf_list.spinlock,flags);
if (n_hdlc->rx_buf_list.head)
count = n_hdlc->rx_buf_list.head->count;
else
count = 0;
spin_unlock_irqrestore(&n_hdlc->rx_buf_list.spinlock,flags);
PUT_USER (error, count, (int *) arg);
break;
case TIOCOUTQ:
/* get the pending tx byte count in the driver */
count = tty->driver.chars_in_buffer ?
tty->driver.chars_in_buffer(tty) : 0;
/* add size of next output frame in queue */
spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock,flags);
if (n_hdlc->tx_buf_list.head)
count += n_hdlc->tx_buf_list.head->count;
spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock,flags);
PUT_USER (error, count, (int*)arg);
break;
default:
error = n_tty_ioctl (tty, file, cmd, arg);
break;
}
return error;
} /* end of n_hdlc_tty_ioctl() */
int m5249audio_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
{
long val;
int rc = 0;
#ifdef DEBUG
printk("m5249audio_ioctl(cmd=%x,arg=%x)\n", (int) cmd, (int) arg);
#endif
switch (cmd) {
case SNDCTL_DSP_SPEED:
rc = verify_area(VERIFY_READ, (void *) arg, sizeof(val));
if (rc == 0) {
GET_USER(val, (unsigned long *) arg);
m5249audio_txdrain();
m5249audio_speed = val;
/* FIXME: adjust replay speed?? */
}
break;
case SNDCTL_DSP_SAMPLESIZE:
rc = verify_area(VERIFY_READ, (void *) arg, sizeof(val));
if (rc == 0) {
GET_USER(val, (unsigned long *) arg);
m5249audio_txdrain();
m5249audio_setsamplesize(val);
}
break;
case SNDCTL_DSP_CHANNELS:
rc = verify_area(VERIFY_READ, (void *) arg, sizeof(val));
if (rc == 0) {
GET_USER(val, (unsigned long *) arg);
m5249audio_txdrain();
m5249audio_stereo = ((val == 1) ? 0 : 1);
}
break;
case SNDCTL_DSP_STEREO:
rc = verify_area(VERIFY_READ, (void *) arg, sizeof(val));
if (rc == 0) {
GET_USER(val, (unsigned long *) arg);
m5249audio_txdrain();
m5249audio_stereo = val;
}
break;
case SNDCTL_DSP_GETBLKSIZE:
rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long));
if (rc == 0)
PUT_USER(DMASIZE, (long *) arg);
break;
case SNDCTL_DSP_SYNC:
m5249audio_txdrain();
break;
default:
rc = -EINVAL;
break;
}
return(rc);
}
