summaryrefslogtreecommitdiffstats
path: root/drivers/spi/spi-coldfire-qspi.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/spi/spi-coldfire-qspi.c')
-rw-r--r--drivers/spi/spi-coldfire-qspi.c112
1 files changed, 46 insertions, 66 deletions
diff --git a/drivers/spi/spi-coldfire-qspi.c b/drivers/spi/spi-coldfire-qspi.c
index 28ae470397a9..e2fa628e55e7 100644
--- a/drivers/spi/spi-coldfire-qspi.c
+++ b/drivers/spi/spi-coldfire-qspi.c
@@ -77,8 +77,6 @@ struct mcfqspi {
struct mcfqspi_cs_control *cs_control;
wait_queue_head_t waitq;
-
- struct device *dev;
};
static void mcfqspi_wr_qmr(struct mcfqspi *mcfqspi, u16 val)
@@ -135,13 +133,13 @@ static void mcfqspi_cs_deselect(struct mcfqspi *mcfqspi, u8 chip_select,
static int mcfqspi_cs_setup(struct mcfqspi *mcfqspi)
{
- return (mcfqspi->cs_control && mcfqspi->cs_control->setup) ?
+ return (mcfqspi->cs_control->setup) ?
mcfqspi->cs_control->setup(mcfqspi->cs_control) : 0;
}
static void mcfqspi_cs_teardown(struct mcfqspi *mcfqspi)
{
- if (mcfqspi->cs_control && mcfqspi->cs_control->teardown)
+ if (mcfqspi->cs_control->teardown)
mcfqspi->cs_control->teardown(mcfqspi->cs_control);
}
@@ -300,68 +298,45 @@ static void mcfqspi_transfer_msg16(struct mcfqspi *mcfqspi, unsigned count,
}
}
-static int mcfqspi_transfer_one_message(struct spi_master *master,
- struct spi_message *msg)
+static void mcfqspi_set_cs(struct spi_device *spi, bool enable)
{
- struct mcfqspi *mcfqspi = spi_master_get_devdata(master);
- struct spi_device *spi = msg->spi;
- struct spi_transfer *t;
- int status = 0;
-
- list_for_each_entry(t, &msg->transfers, transfer_list) {
- bool cs_high = spi->mode & SPI_CS_HIGH;
- u16 qmr = MCFQSPI_QMR_MSTR;
-
- qmr |= t->bits_per_word << 10;
- if (spi->mode & SPI_CPHA)
- qmr |= MCFQSPI_QMR_CPHA;
- if (spi->mode & SPI_CPOL)
- qmr |= MCFQSPI_QMR_CPOL;
- if (t->speed_hz)
- qmr |= mcfqspi_qmr_baud(t->speed_hz);
- else
- qmr |= mcfqspi_qmr_baud(spi->max_speed_hz);
- mcfqspi_wr_qmr(mcfqspi, qmr);
+ struct mcfqspi *mcfqspi = spi_master_get_devdata(spi->master);
+ bool cs_high = spi->mode & SPI_CS_HIGH;
+ if (enable)
mcfqspi_cs_select(mcfqspi, spi->chip_select, cs_high);
+ else
+ mcfqspi_cs_deselect(mcfqspi, spi->chip_select, cs_high);
+}
- mcfqspi_wr_qir(mcfqspi, MCFQSPI_QIR_SPIFE);
- if (t->bits_per_word == 8)
- mcfqspi_transfer_msg8(mcfqspi, t->len, t->tx_buf,
- t->rx_buf);
- else
- mcfqspi_transfer_msg16(mcfqspi, t->len / 2, t->tx_buf,
- t->rx_buf);
- mcfqspi_wr_qir(mcfqspi, 0);
-
- if (t->delay_usecs)
- udelay(t->delay_usecs);
- if (t->cs_change) {
- if (!list_is_last(&t->transfer_list, &msg->transfers))
- mcfqspi_cs_deselect(mcfqspi, spi->chip_select,
- cs_high);
- } else {
- if (list_is_last(&t->transfer_list, &msg->transfers))
- mcfqspi_cs_deselect(mcfqspi, spi->chip_select,
- cs_high);
- }
- msg->actual_length += t->len;
- }
- msg->status = status;
- spi_finalize_current_message(master);
-
- return status;
+static int mcfqspi_transfer_one(struct spi_master *master,
+ struct spi_device *spi,
+ struct spi_transfer *t)
+{
+ struct mcfqspi *mcfqspi = spi_master_get_devdata(master);
+ u16 qmr = MCFQSPI_QMR_MSTR;
+
+ qmr |= t->bits_per_word << 10;
+ if (spi->mode & SPI_CPHA)
+ qmr |= MCFQSPI_QMR_CPHA;
+ if (spi->mode & SPI_CPOL)
+ qmr |= MCFQSPI_QMR_CPOL;
+ qmr |= mcfqspi_qmr_baud(t->speed_hz);
+ mcfqspi_wr_qmr(mcfqspi, qmr);
+
+ mcfqspi_wr_qir(mcfqspi, MCFQSPI_QIR_SPIFE);
+ if (t->bits_per_word == 8)
+ mcfqspi_transfer_msg8(mcfqspi, t->len, t->tx_buf, t->rx_buf);
+ else
+ mcfqspi_transfer_msg16(mcfqspi, t->len / 2, t->tx_buf,
+ t->rx_buf);
+ mcfqspi_wr_qir(mcfqspi, 0);
+ return 0;
}
static int mcfqspi_setup(struct spi_device *spi)
{
- if (spi->chip_select >= spi->master->num_chipselect) {
- dev_dbg(&spi->dev, "%d chip select is out of range\n",
- spi->chip_select);
- return -EINVAL;
- }
-
mcfqspi_cs_deselect(spi_master_get_devdata(spi->master),
spi->chip_select, spi->mode & SPI_CS_HIGH);
@@ -388,6 +363,11 @@ static int mcfqspi_probe(struct platform_device *pdev)
return -ENOENT;
}
+ if (!pdata->cs_control) {
+ dev_dbg(&pdev->dev, "pdata->cs_control is NULL\n");
+ return -EINVAL;
+ }
+
master = spi_alloc_master(&pdev->dev, sizeof(*mcfqspi));
if (master == NULL) {
dev_dbg(&pdev->dev, "spi_alloc_master failed\n");
@@ -436,12 +416,12 @@ static int mcfqspi_probe(struct platform_device *pdev)
}
init_waitqueue_head(&mcfqspi->waitq);
- mcfqspi->dev = &pdev->dev;
master->mode_bits = SPI_CS_HIGH | SPI_CPOL | SPI_CPHA;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 16);
master->setup = mcfqspi_setup;
- master->transfer_one_message = mcfqspi_transfer_one_message;
+ master->set_cs = mcfqspi_set_cs;
+ master->transfer_one = mcfqspi_transfer_one;
master->auto_runtime_pm = true;
platform_set_drvdata(pdev, master);
@@ -451,7 +431,7 @@ static int mcfqspi_probe(struct platform_device *pdev)
dev_dbg(&pdev->dev, "spi_register_master failed\n");
goto fail2;
}
- pm_runtime_enable(mcfqspi->dev);
+ pm_runtime_enable(&pdev->dev);
dev_info(&pdev->dev, "Coldfire QSPI bus driver\n");
@@ -473,9 +453,8 @@ static int mcfqspi_remove(struct platform_device *pdev)
{
struct spi_master *master = platform_get_drvdata(pdev);
struct mcfqspi *mcfqspi = spi_master_get_devdata(master);
- struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pm_runtime_disable(mcfqspi->dev);
+ pm_runtime_disable(&pdev->dev);
/* disable the hardware (set the baud rate to 0) */
mcfqspi_wr_qmr(mcfqspi, MCFQSPI_QMR_MSTR);
@@ -490,8 +469,11 @@ static int mcfqspi_suspend(struct device *dev)
{
struct spi_master *master = dev_get_drvdata(dev);
struct mcfqspi *mcfqspi = spi_master_get_devdata(master);
+ int ret;
- spi_master_suspend(master);
+ ret = spi_master_suspend(master);
+ if (ret)
+ return ret;
clk_disable(mcfqspi->clk);
@@ -503,11 +485,9 @@ static int mcfqspi_resume(struct device *dev)
struct spi_master *master = dev_get_drvdata(dev);
struct mcfqspi *mcfqspi = spi_master_get_devdata(master);
- spi_master_resume(master);
-
clk_enable(mcfqspi->clk);
- return 0;
+ return spi_master_resume(master);
}
#endif