static int sh_mobile_i2c_xfer(struct i2c_adapter *adapter,
struct i2c_msg *msgs,
int num)
{
struct sh_mobile_i2c_data *pd = i2c_get_adapdata(adapter);
struct i2c_msg *msg;
int err = 0;
int i;
long timeout;
/* Wake up device and enable clock */
pm_runtime_get_sync(pd->dev);
/* Process all messages */
for (i = 0; i < num; i++) {
bool do_start = pd->send_stop || !i;
msg = &msgs[i];
pd->send_stop = i == num - 1 || msg->flags & I2C_M_STOP;
pd->stop_after_dma = false;
start_ch(pd, msg, do_start);
if (do_start)
i2c_op(pd, OP_START, 0);
/* The interrupt handler takes care of the rest... */
timeout = wait_event_timeout(pd->wait,
pd->sr & (ICSR_TACK | SW_DONE),
adapter->timeout);
/* 'stop_after_dma' tells if DMA transfer was complete */
i2c_put_dma_safe_msg_buf(pd->dma_buf, pd->msg, pd->stop_after_dma);
if (!timeout) {
dev_err(pd->dev, "Transfer request timed out\n");
if (pd->dma_direction != DMA_NONE)
sh_mobile_i2c_cleanup_dma(pd);
err = -ETIMEDOUT;
break;
}
if (pd->send_stop)
err = poll_busy(pd);
else
err = poll_dte(pd);
if (err < 0)
break;
}
/* Disable channel */
iic_wr(pd, ICCR, ICCR_SCP);
/* Disable clock and mark device as idle */
pm_runtime_put_sync(pd->dev);
return err ?: num;
}
static int sh_mobile_i2c_xfer(struct i2c_adapter *adapter,
struct i2c_msg *msgs,
int num)
{
struct sh_mobile_i2c_data *pd = i2c_get_adapdata(adapter);
struct i2c_msg *msg;
int err = 0;
int i, k;
activate_ch(pd);
/* Process all messages */
for (i = 0; i < num; i++) {
bool do_start = pd->send_stop || !i;
msg = &msgs[i];
pd->send_stop = i == num - 1 || msg->flags & I2C_M_STOP;
err = start_ch(pd, msg, do_start);
if (err)
break;
if (do_start)
i2c_op(pd, OP_START, 0);
/* The interrupt handler takes care of the rest... */
k = wait_event_timeout(pd->wait,
pd->sr & (ICSR_TACK | SW_DONE),
5 * HZ);
if (!k) {
dev_err(pd->dev, "Transfer request timed out\n");
err = -ETIMEDOUT;
break;
}
if (pd->send_stop)
err = poll_busy(pd);
else
err = poll_dte(pd);
if (err < 0)
break;
}
deactivate_ch(pd);
if (!err)
err = num;
return err;
}