forked from mirrors/linux
spi: omap2-mcspi: Switch driver to use transfer_one
Switches from transfer_one_message to transfer_one to prepare driver for use of GPIO chip selects. Signed-off-by: Michael Welling <mwelling@ieee.org> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Michael Welling
Mark Brown
parent
7d76980242
commit
b28cb9414d
1 changed files with 122 additions and 146 deletions
|
|
@ -1052,7 +1052,8 @@ static void omap2_mcspi_cleanup(struct spi_device *spi)
|
|||
}
|
||||
}
|
||||
|
||||
static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
|
||||
static int omap2_mcspi_work_one(struct omap2_mcspi *mcspi,
|
||||
struct spi_device *spi, struct spi_transfer *t)
|
||||
{
|
||||
|
||||
/* We only enable one channel at a time -- the one whose message is
|
||||
|
|
@ -1062,8 +1063,6 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
|
|||
* chipselect with the FORCE bit ... CS != channel enable.
|
||||
*/
|
||||
|
||||
struct spi_device *spi;
|
||||
struct spi_transfer *t = NULL;
|
||||
struct spi_master *master;
|
||||
struct omap2_mcspi_dma *mcspi_dma;
|
||||
int cs_active = 0;
|
||||
|
|
@ -1073,7 +1072,6 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
|
|||
int status = 0;
|
||||
u32 chconf;
|
||||
|
||||
spi = m->spi;
|
||||
master = spi->master;
|
||||
mcspi_dma = mcspi->dma_channels + spi->chip_select;
|
||||
cs = spi->controller_state;
|
||||
|
|
@ -1090,18 +1088,14 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
|
|||
par_override = 1;
|
||||
|
||||
omap2_mcspi_set_enable(spi, 0);
|
||||
list_for_each_entry(t, &m->transfers, transfer_list) {
|
||||
if (t->tx_buf == NULL && t->rx_buf == NULL && t->len) {
|
||||
status = -EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
if (par_override ||
|
||||
(t->speed_hz != spi->max_speed_hz) ||
|
||||
(t->bits_per_word != spi->bits_per_word)) {
|
||||
par_override = 1;
|
||||
status = omap2_mcspi_setup_transfer(spi, t);
|
||||
if (status < 0)
|
||||
break;
|
||||
goto out;
|
||||
if (t->speed_hz == spi->max_speed_hz &&
|
||||
t->bits_per_word == spi->bits_per_word)
|
||||
par_override = 0;
|
||||
|
|
@ -1114,7 +1108,6 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
|
|||
mcspi_read_cs_reg(spi, OMAP2_MCSPI_MODULCTRL);
|
||||
}
|
||||
|
||||
|
||||
if (!cs_active) {
|
||||
omap2_mcspi_force_cs(spi, 1);
|
||||
cs_active = 1;
|
||||
|
|
@ -1141,7 +1134,7 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
|
|||
unsigned count;
|
||||
|
||||
if ((mcspi_dma->dma_rx && mcspi_dma->dma_tx) &&
|
||||
(m->is_dma_mapped || t->len >= DMA_MIN_BYTES))
|
||||
(t->len >= DMA_MIN_BYTES))
|
||||
omap2_mcspi_set_fifo(spi, t, 1);
|
||||
|
||||
omap2_mcspi_set_enable(spi, 1);
|
||||
|
|
@ -1152,15 +1145,14 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
|
|||
+ OMAP2_MCSPI_TX0);
|
||||
|
||||
if ((mcspi_dma->dma_rx && mcspi_dma->dma_tx) &&
|
||||
(m->is_dma_mapped || t->len >= DMA_MIN_BYTES))
|
||||
(t->len >= DMA_MIN_BYTES))
|
||||
count = omap2_mcspi_txrx_dma(spi, t);
|
||||
else
|
||||
count = omap2_mcspi_txrx_pio(spi, t);
|
||||
m->actual_length += count;
|
||||
|
||||
if (count != t->len) {
|
||||
status = -EIO;
|
||||
break;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1177,7 +1169,8 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
|
|||
|
||||
if (mcspi->fifo_depth > 0)
|
||||
omap2_mcspi_set_fifo(spi, t, 0);
|
||||
}
|
||||
|
||||
out:
|
||||
/* Restore defaults if they were overriden */
|
||||
if (par_override) {
|
||||
par_override = 0;
|
||||
|
|
@ -1200,29 +1193,21 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
|
|||
if (mcspi->fifo_depth > 0 && t)
|
||||
omap2_mcspi_set_fifo(spi, t, 0);
|
||||
|
||||
m->status = status;
|
||||
return status;
|
||||
}
|
||||
|
||||
static int omap2_mcspi_transfer_one_message(struct spi_master *master,
|
||||
struct spi_message *m)
|
||||
static int omap2_mcspi_transfer_one(struct spi_master *master,
|
||||
struct spi_device *spi, struct spi_transfer *t)
|
||||
{
|
||||
struct spi_device *spi;
|
||||
struct omap2_mcspi *mcspi;
|
||||
struct omap2_mcspi_dma *mcspi_dma;
|
||||
struct spi_transfer *t;
|
||||
int status;
|
||||
|
||||
spi = m->spi;
|
||||
mcspi = spi_master_get_devdata(master);
|
||||
mcspi_dma = mcspi->dma_channels + spi->chip_select;
|
||||
m->actual_length = 0;
|
||||
m->status = 0;
|
||||
|
||||
list_for_each_entry(t, &m->transfers, transfer_list) {
|
||||
const void *tx_buf = t->tx_buf;
|
||||
void *rx_buf = t->rx_buf;
|
||||
unsigned len = t->len;
|
||||
|
||||
mcspi = spi_master_get_devdata(master);
|
||||
mcspi_dma = mcspi->dma_channels + spi->chip_select;
|
||||
|
||||
if ((len && !(rx_buf || tx_buf))) {
|
||||
dev_dbg(mcspi->dev, "transfer: %d Hz, %d %s%s, %d bpw\n",
|
||||
t->speed_hz,
|
||||
|
|
@ -1230,12 +1215,11 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
|
|||
tx_buf ? "tx" : "",
|
||||
rx_buf ? "rx" : "",
|
||||
t->bits_per_word);
|
||||
status = -EINVAL;
|
||||
goto out;
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (m->is_dma_mapped || len < DMA_MIN_BYTES)
|
||||
continue;
|
||||
if (len < DMA_MIN_BYTES)
|
||||
goto skip_dma_map;
|
||||
|
||||
if (mcspi_dma->dma_tx && tx_buf != NULL) {
|
||||
t->tx_dma = dma_map_single(mcspi->dev, (void *) tx_buf,
|
||||
|
|
@ -1243,8 +1227,7 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
|
|||
if (dma_mapping_error(mcspi->dev, t->tx_dma)) {
|
||||
dev_dbg(mcspi->dev, "dma %cX %d bytes error\n",
|
||||
'T', len);
|
||||
status = -EINVAL;
|
||||
goto out;
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
if (mcspi_dma->dma_rx && rx_buf != NULL) {
|
||||
|
|
@ -1256,19 +1239,12 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
|
|||
if (tx_buf != NULL)
|
||||
dma_unmap_single(mcspi->dev, t->tx_dma,
|
||||
len, DMA_TO_DEVICE);
|
||||
status = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
omap2_mcspi_work(mcspi, m);
|
||||
/* spi_finalize_current_message() changes the status inside the
|
||||
* spi_message, save the status here. */
|
||||
status = m->status;
|
||||
out:
|
||||
spi_finalize_current_message(master);
|
||||
return status;
|
||||
skip_dma_map:
|
||||
return omap2_mcspi_work_one(mcspi, spi, t);
|
||||
}
|
||||
|
||||
static int omap2_mcspi_master_setup(struct omap2_mcspi *mcspi)
|
||||
|
|
@ -1347,7 +1323,7 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
|
|||
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
|
||||
master->setup = omap2_mcspi_setup;
|
||||
master->auto_runtime_pm = true;
|
||||
master->transfer_one_message = omap2_mcspi_transfer_one_message;
|
||||
master->transfer_one = omap2_mcspi_transfer_one;
|
||||
master->cleanup = omap2_mcspi_cleanup;
|
||||
master->dev.of_node = node;
|
||||
master->max_speed_hz = OMAP2_MCSPI_MAX_FREQ;
|
||||
|
|
|
|||
Loading…
Reference in a new issue