void alsa_cleanup() {
dev_stop();
if (hparams != NULL) snd_pcm_hw_params_free(hparams);
free_ringbuf(rbuf);
rbuf = NULL;
return;
}
/* call when the device plug out. free all the memory alloced by probe */
static void spcp8x5_release(struct usb_serial *serial)
{
int i;
struct spcp8x5_private *priv;
for (i = 0; i < serial->num_ports; i++) {
priv = usb_get_serial_port_data(serial->port[i]);
if (priv) {
free_ringbuf(priv->buf);
kfree(priv);
}
}
}
static void free_feed(FEED *feed) {
if (feed == NULL) return;
if (feed->thread_id != 0) pthread_cancel(feed->thread_id);
free_ringbuf(feed->cbuf);
feed->cbuf = NULL;
if (feed->converter) {
src_delete(feed->converter);
free(feed->src_data_in);
free(feed->src_data_out);
feed->src_data_in = feed->src_data_out = NULL;
}
if (feed->sock) close(feed->sock);
free(feed);
}
/* desc : when device plug in,this function would be called.
* thanks to usb_serial subsystem,then do almost every things for us. And what
* we should do just alloc the buffer */
static int spcp8x5_startup(struct usb_serial *serial)
{
struct spcp8x5_private *priv;
int i;
enum spcp8x5_type type = SPCP825_007_TYPE;
u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
if (product == 0x0201)
type = SPCP825_007_TYPE;
else if (product == 0x0231)
type = SPCP835_TYPE;
else if (product == 0x0235)
type = SPCP825_008_TYPE;
else if (product == 0x0204)
type = SPCP825_INTERMATIC_TYPE;
else if (product == 0x0471 &&
serial->dev->descriptor.idVendor == cpu_to_le16(0x081e))
type = SPCP825_PHILIP_TYPE;
dev_dbg(&serial->dev->dev, "device type = %d\n", (int)type);
for (i = 0; i < serial->num_ports; ++i) {
priv = kzalloc(sizeof(struct spcp8x5_private), GFP_KERNEL);
if (!priv)
goto cleanup;
spin_lock_init(&priv->lock);
priv->buf = alloc_ringbuf(SPCP8x5_BUF_SIZE);
if (priv->buf == NULL)
goto cleanup2;
init_waitqueue_head(&priv->delta_msr_wait);
priv->type = type;
usb_set_serial_port_data(serial->port[i] , priv);
}
return 0;
cleanup2:
kfree(priv);
cleanup:
for (--i; i >= 0; --i) {
priv = usb_get_serial_port_data(serial->port[i]);
free_ringbuf(priv->buf);
kfree(priv);
usb_set_serial_port_data(serial->port[i] , NULL);
}
return -ENOMEM;
}
