int if_hsi_openchannel(struct if_hsi_channel *channel)
{
int ret = 0;
dev_dbg(&channel->dev->device, "%s, ch = %d\n", __func__,
channel->channel_id);
spin_lock(&channel->lock);
if (channel->state == HSI_CHANNEL_STATE_UNAVAIL) {
ret = -ENODEV;
goto leave;
}
if (channel->opened) {
ret = -EBUSY;
goto leave;
}
if (!channel->dev) {
pr_err("Channel %d is not ready??\n", channel->channel_id);
ret = -ENODEV;
goto leave;
}
spin_unlock(&channel->lock);
ret = hsi_open(channel->dev);
spin_lock(&channel->lock);
if (ret < 0) {
pr_err("Could not open channel %d\n", channel->channel_id);
goto leave;
}
channel->opened = 1;
channel->tx_state = HSI_LL_TX_STATE_IDLE;
channel->rx_state = HSI_LL_RX_STATE_TO_CONN_READY;
printk(KERN_INFO "setting channel->opened=1 for channel %d\n", channel->dev->n_ch);
leave:
spin_unlock(&channel->lock);
return ret;
}
static int if_hsi_open_channel(struct if_hsi_channel *channel)
{
int ret;
if (channel->opened) {
pr_debug("[MIPI-HSI] channel %d is already opened\n",
channel->channel_id);
return 0;
}
ret = hsi_open(channel->dev);
if (ret) {
pr_err("[MIPI-HSI] hsi_open fail : %d\n", ret);
if (ret == -EBUSY)
pr_err("[MIPI-HSI] ch %d already opened\n",
channel->channel_id);
else
return ret;
}
channel->opened = 1;
pr_debug("[MIPI-HSI] hsi_open Done : %d\n", channel->channel_id);
return 0;
}
