static long vocpcm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct voc_ctxt *ctxt = file->private_data;
struct buffer *frame;
unsigned long flags;
uint32_t index;
uint32_t data_index;
uint32_t len = 0;
uint8_t *dest;
int rc = 0;
mutex_lock(&ctxt->lock);
switch (cmd) {
case VOCPCM_REGISTER_CLIENT:
rc = voc_register_client(ctxt);
break;
case VOCPCM_UNREGISTER_CLIENT:
if (ctxt->intr % 2) {
if (ctxt->s_ptr) {
index = ctxt->head;
frame = ctxt->buf[index].data;
data_index = FRAME_NUM * FRAME_SIZE - 1;
dest = (uint8_t *)&frame->data[data_index] + 1;
len = dest - ctxt->s_ptr + 1;
memset(ctxt->s_ptr, 0, len);
spin_lock_irqsave(&ctxt->dsp_lock, flags);
frame->index = 0;
ctxt->head = (ctxt->head + 1) &
(BUFFER_NUM - 1);
ctxt->count++;
ctxt->final_input = 1;
spin_unlock_irqrestore(&ctxt->dsp_lock, flags);
rc = wait_event_interruptible_timeout(
ctxt->last_write_wait,
ctxt->count == 0,
5 * HZ);
if (rc < 0)
break;
}
}
if (ctxt->client)
rc = voc_unregister_client(ctxt);
else
pr_err("no %d client to unregister.", ctxt->intr);
break;
default:
pr_err("unknown command.\n");
rc = -EINVAL;
break;
}
mutex_unlock(&ctxt->lock);
return rc;
}
static long vocpcm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct voc_ctxt *ctxt = file->private_data;
int rc = 0;
mutex_lock(&ctxt->lock);
switch (cmd) {
case VOCPCM_REGISTER_CLIENT:
rc = voc_register_client(ctxt);
break;
case VOCPCM_UNREGISTER_CLIENT:
if (ctxt->client)
rc = voc_unregister_client(ctxt);
else
pr_err("no %d client to unregister.", ctxt->intr);
break;
default:
pr_err("unknown command.\n");
rc = -EINVAL;
break;
}
mutex_unlock(&ctxt->lock);
return rc;
}
