static int s5p_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg)
{
struct s5p_cec_dev *cec = cec_get_drvdata(adap);
/*
* Unclear if 0 retries are allowed by the hardware, so have 1 as
* the minimum.
*/
s5p_cec_copy_packet(cec, msg->msg, msg->len, max(1, attempts - 1));
return 0;
}
static ssize_t s5p_cec_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
char *data;
/* check data size */
if (count > CEC_TX_BUFF_SIZE || count == 0)
return -1;
data = kmalloc(count, GFP_KERNEL);
if (!data) {
printk(KERN_ERR " kmalloc() failed!\n");
return -1;
}
if (copy_from_user(data, buffer, count)) {
printk(KERN_ERR " copy_from_user() failed!\n");
kfree(data);
return -EFAULT;
}
s5p_cec_copy_packet(data, count);
kfree(data);
/* wait for interrupt */
if (wait_event_interruptible(cec_tx_struct.waitq,
atomic_read(&cec_tx_struct.state)
!= STATE_TX)) {
return -ERESTARTSYS;
}
if (atomic_read(&cec_tx_struct.state) == STATE_ERROR)
return -1;
return count;
}