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spi: rspi: Extract rspi_wait_for_{tx_empty,rx_full}() 

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
hifive-unleashed-5.1
Geert Uytterhoeven 2014-06-02 15:38:03 +02:00 committed by Mark Brown
parent 3beb61dbfc
commit 5f684c34fc
1 changed files with 21 additions and 8 deletions
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29
drivers/spi/spi-rspi.c
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@ -405,11 +405,22 @@ static int rspi_wait_for_interrupt(struct rspi_data *rspi, u8 wait_mask,
return 0;
}
static inline int rspi_wait_for_tx_empty(struct rspi_data *rspi)
{
return rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
}
static inline int rspi_wait_for_rx_full(struct rspi_data *rspi)
{
return rspi_wait_for_interrupt(rspi, SPSR_SPRF, SPCR_SPRIE);
}
static int rspi_data_out(struct rspi_data *rspi, u8 data)
{
if (rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE) < 0) {
int error = rspi_wait_for_tx_empty(rspi);
if (error < 0) {
dev_err(&rspi->master->dev, "transmit timeout\n");
return -ETIMEDOUT;
return error;
}
rspi_write_data(rspi, data);
return 0;
@ -417,11 +428,13 @@ static int rspi_data_out(struct rspi_data *rspi, u8 data)
static int rspi_data_in(struct rspi_data *rspi)
{
int error;
u8 data;
if (rspi_wait_for_interrupt(rspi, SPSR_SPRF, SPCR_SPRIE) < 0) {
error = rspi_wait_for_rx_full(rspi);
if (error < 0) {
dev_err(&rspi->master->dev, "receive timeout\n");
return -ETIMEDOUT;
return error;
}
data = rspi_read_data(rspi);
return data;
@ -737,7 +750,7 @@ static int rspi_transfer_out_in(struct rspi_data *rspi,
}
/* Wait for the last transmission */
rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
rspi_wait_for_tx_empty(rspi);
return 0;
}
@ -783,7 +796,7 @@ static int rspi_rz_transfer_out_in(struct rspi_data *rspi,
}
/* Wait for the last transmission */
rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
rspi_wait_for_tx_empty(rspi);
return 0;
}
@ -818,7 +831,7 @@ static int qspi_transfer_out_in(struct rspi_data *rspi,
}
/* Wait for the last transmission */
rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
rspi_wait_for_tx_empty(rspi);
return 0;
}
@ -836,7 +849,7 @@ static int qspi_transfer_out(struct rspi_data *rspi, struct spi_transfer *xfer)
}
/* Wait for the last transmission */
rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE);
rspi_wait_for_tx_empty(rspi);
return 0;
}