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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 11:51:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 11:51:05 -0700
commit750b2d7b93f2ba19f4f238cc641bda22fe07c155 (patch)
treebfef33ef5444ac2ac78c61e47baa7a5d19916214 /drivers/spi
parent3dbde57ad941c55345fd7fac0ee3f70f204b02d8 (diff)
parented893559c9799df3b32051871c22017151394d82 (diff)
Merge tag 'spi-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi updates from Mark Brown: "A fairly quiet release for the SPI subsystem, the standout changes being: - Core support for implementing bits per word constraints implemented by Stephen Warren, factoring some code out of drivers. - Addition of polling mode support for the s3c64xx driver as some newer Exynos systems have taken the unusual step of removing interrupt support. - Use of the in-IP FIFO and generic dmaengine support for the OMAP2 driver, providing improved performance. - Conversion of the mpc512x driver to use the core message queue infrastructure. The nicest thing being that all the factoring out into common code leads to a negative diffstat overall." * tag 'spi-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (42 commits) spi/s3c64xx: Rely on the compiler eliminating the OF ID table spi: s3c64xx: Added support for exynos5440 spi spi: s3c64xx: Added provision for dedicated cs pin spi: omap2-mcspi: add generic DMA request support to the DT binding spi: omap2-mcspi: convert to dma_request_slave_channel_compat() spi/s3c64xx: Make wait_for_timeout() function name less generic spi: s3c64xx: added support for polling mode spi: omap2-mcspi: Add FIFO buffer support spi: omap2-mcspi: Move bytes per word calculation to the function spi: spi-xilinx: cleanup a check in xilinx_spi_txrx_bufs() spi: spi-nuc900: Remove redundant platform_set_drvdata() spi: spi-fsl-lib: Make mpc8xxx_spi_work static spi: spi-topcliff-pch: Fix sparse warnings spi: spi-xilinx: Remove redundant platform_set_drvdata() spi: spi-xilinx: Add run run-time endian detection spi: mpc512x: use the SPI subsystem's message queue spi: mpc512x: improve throughput in the RX/TX func spi: mpc512x: minor prep before feature change spi: atmel: convert to dma_request_slave_channel_compat() spi: sirf: avoid uninitialized-use warning ...
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-altera.c14
-rw-r--r--drivers/spi/spi-ath79.c6
-rw-r--r--drivers/spi/spi-atmel.c51
-rw-r--r--drivers/spi/spi-au1550.c14
-rw-r--r--drivers/spi/spi-bcm2835.c7
-rw-r--r--drivers/spi/spi-bcm63xx.c23
-rw-r--r--drivers/spi/spi-bfin-sport.c13
-rw-r--r--drivers/spi/spi-bfin5xx.c24
-rw-r--r--drivers/spi/spi-clps711x.c9
-rw-r--r--drivers/spi/spi-coldfire-qspi.c23
-rw-r--r--drivers/spi/spi-davinci.c12
-rw-r--r--drivers/spi/spi-dw-mmio.c2
-rw-r--r--drivers/spi/spi-dw.c26
-rw-r--r--drivers/spi/spi-ep93xx.c14
-rw-r--r--drivers/spi/spi-fsl-espi.c9
-rw-r--r--drivers/spi/spi-fsl-lib.c2
-rw-r--r--drivers/spi/spi-fsl-spi.c2
-rw-r--r--drivers/spi/spi-gpio.c6
-rw-r--r--drivers/spi/spi-imx.c17
-rw-r--r--drivers/spi/spi-mpc512x-psc.c341
-rw-r--r--drivers/spi/spi-mpc52xx-psc.c2
-rw-r--r--drivers/spi/spi-mpc52xx.c4
-rw-r--r--drivers/spi/spi-mxs.c13
-rw-r--r--drivers/spi/spi-nuc900.c15
-rw-r--r--drivers/spi/spi-oc-tiny.c2
-rw-r--r--drivers/spi/spi-omap-100k.c16
-rw-r--r--drivers/spi/spi-omap-uwire.c4
-rw-r--r--drivers/spi/spi-omap2-mcspi.c254
-rw-r--r--drivers/spi/spi-orion.c4
-rw-r--r--drivers/spi/spi-ppc4xx.c19
-rw-r--r--drivers/spi/spi-pxa2xx-dma.c11
-rw-r--r--drivers/spi/spi-pxa2xx.c60
-rw-r--r--drivers/spi/spi-rspi.c4
-rw-r--r--drivers/spi/spi-s3c24xx.c2
-rw-r--r--drivers/spi/spi-s3c64xx.c207
-rw-r--r--drivers/spi/spi-sh-hspi.c4
-rw-r--r--drivers/spi/spi-sh.c4
-rw-r--r--drivers/spi/spi-sirf.c61
-rw-r--r--drivers/spi/spi-tegra114.c4
-rw-r--r--drivers/spi/spi-tegra20-sflash.c4
-rw-r--r--drivers/spi/spi-tegra20-slink.c4
-rw-r--r--drivers/spi/spi-ti-ssp.c16
-rw-r--r--drivers/spi/spi-topcliff-pch.c25
-rw-r--r--drivers/spi/spi-txx9.c10
-rw-r--r--drivers/spi/spi-xcomm.c12
-rw-r--r--drivers/spi/spi-xilinx.c48
46 files changed, 679 insertions, 745 deletions
diff --git a/drivers/spi/spi-altera.c b/drivers/spi/spi-altera.c
index a537f8dffc09..8a6bb37910da 100644
--- a/drivers/spi/spi-altera.c
+++ b/drivers/spi/spi-altera.c
@@ -103,16 +103,6 @@ static void altera_spi_chipsel(struct spi_device *spi, int value)
}
}
-static int altera_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
-{
- return 0;
-}
-
-static int altera_spi_setup(struct spi_device *spi)
-{
- return 0;
-}
-
static inline unsigned int hw_txbyte(struct altera_spi *hw, int count)
{
if (hw->tx) {
@@ -231,7 +221,6 @@ static int altera_spi_probe(struct platform_device *pdev)
master->bus_num = pdev->id;
master->num_chipselect = 16;
master->mode_bits = SPI_CS_HIGH;
- master->setup = altera_spi_setup;
hw = spi_master_get_devdata(master);
platform_set_drvdata(pdev, hw);
@@ -240,7 +229,6 @@ static int altera_spi_probe(struct platform_device *pdev)
hw->bitbang.master = spi_master_get(master);
if (!hw->bitbang.master)
return err;
- hw->bitbang.setup_transfer = altera_spi_setupxfer;
hw->bitbang.chipselect = altera_spi_chipsel;
hw->bitbang.txrx_bufs = altera_spi_txrx;
@@ -285,7 +273,6 @@ static int altera_spi_probe(struct platform_device *pdev)
exit_busy:
err = -EBUSY;
exit:
- platform_set_drvdata(pdev, NULL);
spi_master_put(master);
return err;
}
@@ -296,7 +283,6 @@ static int altera_spi_remove(struct platform_device *dev)
struct spi_master *master = hw->bitbang.master;
spi_bitbang_stop(&hw->bitbang);
- platform_set_drvdata(dev, NULL);
spi_master_put(master);
return 0;
}
diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c
index e504b7636058..0e06407a4670 100644
--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -155,9 +155,6 @@ static int ath79_spi_setup(struct spi_device *spi)
{
int status = 0;
- if (spi->bits_per_word > 32)
- return -EINVAL;
-
if (!spi->controller_state) {
status = ath79_spi_setup_cs(spi);
if (status)
@@ -226,6 +223,7 @@ static int ath79_spi_probe(struct platform_device *pdev)
pdata = pdev->dev.platform_data;
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32);
master->setup = ath79_spi_setup;
master->cleanup = ath79_spi_cleanup;
if (pdata) {
@@ -287,7 +285,6 @@ err_clk_put:
err_unmap:
iounmap(sp->base);
err_put_master:
- platform_set_drvdata(pdev, NULL);
spi_master_put(sp->bitbang.master);
return ret;
@@ -302,7 +299,6 @@ static int ath79_spi_remove(struct platform_device *pdev)
clk_disable(sp->clk);
clk_put(sp->clk);
iounmap(sp->base);
- platform_set_drvdata(pdev, NULL);
spi_master_put(sp->bitbang.master);
return 0;
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 380387a47b1d..ea1ec009f44d 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -424,10 +424,15 @@ static int atmel_spi_dma_slave_config(struct atmel_spi *as,
return err;
}
-static bool filter(struct dma_chan *chan, void *slave)
+static bool filter(struct dma_chan *chan, void *pdata)
{
- struct at_dma_slave *sl = slave;
+ struct atmel_spi_dma *sl_pdata = pdata;
+ struct at_dma_slave *sl;
+ if (!sl_pdata)
+ return false;
+
+ sl = &sl_pdata->dma_slave;
if (sl->dma_dev == chan->device->dev) {
chan->private = sl;
return true;
@@ -438,24 +443,31 @@ static bool filter(struct dma_chan *chan, void *slave)
static int atmel_spi_configure_dma(struct atmel_spi *as)
{
- struct at_dma_slave *sdata = &as->dma.dma_slave;
struct dma_slave_config slave_config;
+ struct device *dev = &as->pdev->dev;
int err;
- if (sdata && sdata->dma_dev) {
- dma_cap_mask_t mask;
+ dma_cap_mask_t mask;
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
- /* Try to grab two DMA channels */
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- as->dma.chan_tx = dma_request_channel(mask, filter, sdata);
- if (as->dma.chan_tx)
- as->dma.chan_rx =
- dma_request_channel(mask, filter, sdata);
+ as->dma.chan_tx = dma_request_slave_channel_compat(mask, filter,
+ &as->dma,
+ dev, "tx");
+ if (!as->dma.chan_tx) {
+ dev_err(dev,
+ "DMA TX channel not available, SPI unable to use DMA\n");
+ err = -EBUSY;
+ goto error;
}
- if (!as->dma.chan_rx || !as->dma.chan_tx) {
- dev_err(&as->pdev->dev,
- "DMA channel not available, SPI unable to use DMA\n");
+
+ as->dma.chan_rx = dma_request_slave_channel_compat(mask, filter,
+ &as->dma,
+ dev, "rx");
+
+ if (!as->dma.chan_rx) {
+ dev_err(dev,
+ "DMA RX channel not available, SPI unable to use DMA\n");
err = -EBUSY;
goto error;
}
@@ -1268,13 +1280,6 @@ static int atmel_spi_setup(struct spi_device *spi)
return -EINVAL;
}
- if (bits < 8 || bits > 16) {
- dev_dbg(&spi->dev,
- "setup: invalid bits_per_word %u (8 to 16)\n",
- bits);
- return -EINVAL;
- }
-
/* see notes above re chipselect */
if (!atmel_spi_is_v2(as)
&& spi->chip_select == 0
@@ -1515,7 +1520,7 @@ static int atmel_spi_probe(struct platform_device *pdev)
/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
-
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 16);
master->dev.of_node = pdev->dev.of_node;
master->bus_num = pdev->id;
master->num_chipselect = master->dev.of_node ? 0 : 4;
diff --git a/drivers/spi/spi-au1550.c b/drivers/spi/spi-au1550.c
index 44dd34b6ad09..e1965553ab79 100644
--- a/drivers/spi/spi-au1550.c
+++ b/drivers/spi/spi-au1550.c
@@ -248,11 +248,6 @@ static int au1550_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
hz = t->speed_hz;
}
- if (bpw < 4 || bpw > 24) {
- dev_err(&spi->dev, "setupxfer: invalid bits_per_word=%d\n",
- bpw);
- return -EINVAL;
- }
if (hz > spi->max_speed_hz || hz > hw->freq_max || hz < hw->freq_min) {
dev_err(&spi->dev, "setupxfer: clock rate=%d out of range\n",
hz);
@@ -296,12 +291,6 @@ static int au1550_spi_setup(struct spi_device *spi)
{
struct au1550_spi *hw = spi_master_get_devdata(spi->master);
- if (spi->bits_per_word < 4 || spi->bits_per_word > 24) {
- dev_err(&spi->dev, "setup: invalid bits_per_word=%d\n",
- spi->bits_per_word);
- return -EINVAL;
- }
-
if (spi->max_speed_hz == 0)
spi->max_speed_hz = hw->freq_max;
if (spi->max_speed_hz > hw->freq_max
@@ -782,6 +771,7 @@ static int au1550_spi_probe(struct platform_device *pdev)
/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST;
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 24);
hw = spi_master_get_devdata(master);
@@ -987,8 +977,6 @@ static int au1550_spi_remove(struct platform_device *pdev)
au1xxx_dbdma_chan_free(hw->dma_tx_ch);
}
- platform_set_drvdata(pdev, NULL);
-
spi_master_put(hw->master);
return 0;
}
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index 89c0b5033114..a4185e492321 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -331,10 +331,9 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
goto out_master_put;
}
- bs->regs = devm_request_and_ioremap(&pdev->dev, res);
- if (!bs->regs) {
- dev_err(&pdev->dev, "could not request/map memory region\n");
- err = -ENODEV;
+ bs->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(bs->regs)) {
+ err = PTR_ERR(bs->regs);
goto out_master_put;
}
diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
index a4ec5f4ec817..9fd7a39b8029 100644
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -124,17 +124,6 @@ static void bcm63xx_spi_setup_transfer(struct spi_device *spi,
/* the spi->mode bits understood by this driver: */
#define MODEBITS (SPI_CPOL | SPI_CPHA)
-static int bcm63xx_spi_setup(struct spi_device *spi)
-{
- if (spi->bits_per_word != 8) {
- dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
- __func__, spi->bits_per_word);
- return -EINVAL;
- }
-
- return 0;
-}
-
static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first,
unsigned int num_transfers)
{
@@ -277,13 +266,6 @@ static int bcm63xx_spi_transfer_one(struct spi_master *master,
* full-duplex transfers.
*/
list_for_each_entry(t, &m->transfers, transfer_list) {
- if (t->bits_per_word != 8) {
- dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
- __func__, t->bits_per_word);
- status = -EINVAL;
- goto exit;
- }
-
if (!first)
first = t;
@@ -430,11 +412,11 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
master->bus_num = pdata->bus_num;
master->num_chipselect = pdata->num_chipselect;
- master->setup = bcm63xx_spi_setup;
master->prepare_transfer_hardware = bcm63xx_spi_prepare_transfer;
master->unprepare_transfer_hardware = bcm63xx_spi_unprepare_transfer;
master->transfer_one_message = bcm63xx_spi_transfer_one;
master->mode_bits = MODEBITS;
+ master->bits_per_word_mask = SPI_BPW_MASK(8);
bs->msg_type_shift = pdata->msg_type_shift;
bs->msg_ctl_width = pdata->msg_ctl_width;
bs->tx_io = (u8 *)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA));
@@ -469,7 +451,6 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
out_clk_disable:
clk_disable_unprepare(clk);
out_err:
- platform_set_drvdata(pdev, NULL);
spi_master_put(master);
out_clk:
clk_put(clk);
@@ -491,8 +472,6 @@ static int bcm63xx_spi_remove(struct platform_device *pdev)
clk_disable_unprepare(bs->clk);
clk_put(bs->clk);
- platform_set_drvdata(pdev, 0);
-
spi_master_put(master);
return 0;
diff --git a/drivers/spi/spi-bfin-sport.c b/drivers/spi/spi-bfin-sport.c
index 39b0d1711b4e..07ec597f9732 100644
--- a/drivers/spi/spi-bfin-sport.c
+++ b/drivers/spi/spi-bfin-sport.c
@@ -417,7 +417,7 @@ bfin_sport_spi_pump_transfers(unsigned long data)
/* Bits per word setup */
bits_per_word = transfer->bits_per_word;
- if (bits_per_word % 16 == 0)
+ if (bits_per_word == 16)
drv_data->ops = &bfin_sport_transfer_ops_u16;
else
drv_data->ops = &bfin_sport_transfer_ops_u8;
@@ -600,13 +600,6 @@ bfin_sport_spi_setup(struct spi_device *spi)
}
}
- if (spi->bits_per_word % 8) {
- dev_err(&spi->dev, "%d bits_per_word is not supported\n",
- spi->bits_per_word);
- ret = -EINVAL;
- goto error;
- }
-
/* translate common spi framework into our register
* following configure contents are same for tx and rx.
*/
@@ -778,6 +771,7 @@ static int bfin_sport_spi_probe(struct platform_device *pdev)
drv_data->pin_req = platform_info->pin_req;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
+ master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
master->bus_num = pdev->id;
master->num_chipselect = platform_info->num_chipselect;
master->cleanup = bfin_sport_spi_cleanup;
@@ -882,9 +876,6 @@ static int bfin_sport_spi_remove(struct platform_device *pdev)
peripheral_free_list(drv_data->pin_req);
- /* Prevent double remove */
- platform_set_drvdata(pdev, NULL);
-
return 0;
}
diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c
index 317f564c899c..59a73424419c 100644
--- a/drivers/spi/spi-bfin5xx.c
+++ b/drivers/spi/spi-bfin5xx.c
@@ -643,21 +643,16 @@ static void bfin_spi_pump_transfers(unsigned long data)
/* Bits per word setup */
bits_per_word = transfer->bits_per_word;
- if (bits_per_word % 16 == 0) {
+ if (bits_per_word == 16) {
drv_data->n_bytes = bits_per_word/8;
drv_data->len = (transfer->len) >> 1;
cr_width = BIT_CTL_WORDSIZE;
drv_data->ops = &bfin_bfin_spi_transfer_ops_u16;
- } else if (bits_per_word % 8 == 0) {
+ } else if (bits_per_word == 8) {
drv_data->n_bytes = bits_per_word/8;
drv_data->len = transfer->len;
cr_width = 0;
drv_data->ops = &bfin_bfin_spi_transfer_ops_u8;
- } else {
- dev_err(&drv_data->pdev->dev, "transfer: unsupported bits_per_word\n");
- message->status = -EINVAL;
- bfin_spi_giveback(drv_data);
- return;
}
cr = bfin_read(&drv_data->regs->ctl) & ~(BIT_CTL_TIMOD | BIT_CTL_WORDSIZE);
cr |= cr_width;
@@ -808,13 +803,13 @@ static void bfin_spi_pump_transfers(unsigned long data)
bfin_write(&drv_data->regs->tdbr, chip->idle_tx_val);
else {
int loop;
- if (bits_per_word % 16 == 0) {
+ if (bits_per_word == 16) {
u16 *buf = (u16 *)drv_data->tx;
for (loop = 0; loop < bits_per_word / 16;
loop++) {
bfin_write(&drv_data->regs->tdbr, *buf++);
}
- } else if (bits_per_word % 8 == 0) {
+ } else if (bits_per_word == 8) {
u8 *buf = (u8 *)drv_data->tx;
for (loop = 0; loop < bits_per_word / 8; loop++)
bfin_write(&drv_data->regs->tdbr, *buf++);
@@ -1033,12 +1028,6 @@ static int bfin_spi_setup(struct spi_device *spi)
chip->ctl_reg &= bfin_ctl_reg;
}
- if (spi->bits_per_word % 8) {
- dev_err(&spi->dev, "%d bits_per_word is not supported\n",
- spi->bits_per_word);
- goto error;
- }
-
/* translate common spi framework into our register */
if (spi->mode & ~(SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST)) {
dev_err(&spi->dev, "unsupported spi modes detected\n");
@@ -1299,7 +1288,7 @@ static int bfin_spi_probe(struct platform_device *pdev)
/* the spi->mode bits supported by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
-
+ master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
master->bus_num = pdev->id;
master->num_chipselect = platform_info->num_chipselect;
master->cleanup = bfin_spi_cleanup;
@@ -1418,9 +1407,6 @@ static int bfin_spi_remove(struct platform_device *pdev)
peripheral_free_list(drv_data->pin_req);
- /* Prevent double remove */
- platform_set_drvdata(pdev, NULL);
-
return 0;
}
diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c
index a11cbf02691a..17965fe225cc 100644
--- a/drivers/spi/spi-clps711x.c
+++ b/drivers/spi/spi-clps711x.c
@@ -42,12 +42,6 @@ static int spi_clps711x_setup(struct spi_device *spi)
{
struct spi_clps711x_data *hw = spi_master_get_devdata(spi->master);
- if (spi->bits_per_word != 8) {
- dev_err(&spi->dev, "Unsupported master bus width %i\n",
- spi->bits_per_word);
- return -EINVAL;
- }
-
/* We are expect that SPI-device is not selected */
gpio_direction_output(hw->chipselect[spi->chip_select],
!(spi->mode & SPI_CS_HIGH));
@@ -190,6 +184,7 @@ static int spi_clps711x_probe(struct platform_device *pdev)
master->bus_num = pdev->id;
master->mode_bits = SPI_CPHA | SPI_CS_HIGH;
+ master->bits_per_word_mask = SPI_BPW_MASK(8);
master->num_chipselect = pdata->num_chipselect;
master->setup = spi_clps711x_setup;
master->transfer_one_message = spi_clps711x_transfer_one_message;
@@ -254,7 +249,6 @@ err_out:
if (gpio_is_valid(hw->chipselect[i]))
gpio_free(hw->chipselect[i]);
- platform_set_drvdata(pdev, NULL);
spi_master_put(master);
kfree(master);
@@ -274,7 +268,6 @@ static int spi_clps711x_remove(struct platform_device *pdev)
gpio_free(hw->chipselect[i]);
devm_clk_put(&pdev->dev, hw->spi_clk);
- platform_set_drvdata(pdev, NULL);
spi_unregister_master(master);
kfree(master);
diff --git a/drivers/spi/spi-coldfire-qspi.c b/drivers/spi/spi-coldfire-qspi.c
index 7b5cc9e4e94d..0631b9d4a5de 100644
--- a/drivers/spi/spi-coldfire-qspi.c
+++ b/drivers/spi/spi-coldfire-qspi.c
@@ -312,10 +312,7 @@ static int mcfqspi_transfer_one_message(struct spi_master *master,
bool cs_high = spi->mode & SPI_CS_HIGH;
u16 qmr = MCFQSPI_QMR_MSTR;
- if (t->bits_per_word)
- qmr |= t->bits_per_word << 10;
- else
- qmr |= spi->bits_per_word << 10;
+ qmr |= t->bits_per_word << 10;
if (spi->mode & SPI_CPHA)
qmr |= MCFQSPI_QMR_CPHA;
if (spi->mode & SPI_CPOL)
@@ -377,11 +374,6 @@ static int mcfqspi_unprepare_transfer_hw(struct spi_master *master)
static int mcfqspi_setup(struct spi_device *spi)
{
- if ((spi->bits_per_word < 8) || (spi->bits_per_word > 16)) {
- dev_dbg(&spi->dev, "%d bits per word is not supported\n",
- spi->bits_per_word);
- return -EINVAL;
- }
if (spi->chip_select >= spi->master->num_chipselect) {
dev_dbg(&spi->dev, "%d chip select is out of range\n",
spi->chip_select);
@@ -408,6 +400,12 @@ static int mcfqspi_probe(struct platform_device *pdev)
struct mcfqspi_platform_data *pdata;
int status;
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_dbg(&pdev->dev, "platform data is missing\n");
+ return -ENOENT;
+ }
+
master = spi_alloc_master(&pdev->dev, sizeof(*mcfqspi));
if (master == NULL) {
dev_dbg(&pdev->dev, "spi_alloc_master failed\n");
@@ -458,11 +456,6 @@ static int mcfqspi_probe(struct platform_device *pdev)
}
clk_enable(mcfqspi->clk);
- pdata = pdev->dev.platform_data;
- if (!pdata) {
- dev_dbg(&pdev->dev, "platform data is missing\n");
- goto fail4;
- }
master->bus_num = pdata->bus_num;
master->num_chipselect = pdata->num_chipselect;
@@ -477,6 +470,7 @@ static int mcfqspi_probe(struct platform_device *pdev)
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->prepare_transfer_hardware = mcfqspi_prepare_transfer_hw;
@@ -524,7 +518,6 @@ static int mcfqspi_remove(struct platform_device *pdev)
/* disable the hardware (set the baud rate to 0) */
mcfqspi_wr_qmr(mcfqspi, MCFQSPI_QMR_MSTR);
- platform_set_drvdata(pdev, NULL);
mcfqspi_cs_teardown(mcfqspi);
clk_disable(mcfqspi->clk);
clk_put(mcfqspi->clk);
diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
index 50b13c9b1ab6..222d3e37fc28 100644
--- a/drivers/spi/spi-davinci.c
+++ b/drivers/spi/spi-davinci.c
@@ -299,16 +299,15 @@ static int davinci_spi_setup_transfer(struct spi_device *spi,
* Assign function pointer to appropriate transfer method
* 8bit, 16bit or 32bit transfer
*/
- if (bits_per_word <= 8 && bits_per_word >= 2) {
+ if (bits_per_word <= 8) {
dspi->get_rx = davinci_spi_rx_buf_u8;
dspi->get_tx = davinci_spi_tx_buf_u8;
dspi->bytes_per_word[spi->chip_select] = 1;
- } else if (bits_per_word <= 16 && bits_per_word >= 2) {
+ } else {
dspi->get_rx = davinci_spi_rx_buf_u16;
dspi->get_tx = davinci_spi_tx_buf_u16;
dspi->bytes_per_word[spi->chip_select] = 2;
- } else
- return -EINVAL;
+ }
if (!hz)
hz = spi->max_speed_hz;
@@ -865,7 +864,7 @@ static int davinci_spi_probe(struct platform_device *pdev)
goto err;
}
- dev_set_drvdata(&pdev->dev, master);
+ platform_set_drvdata(pdev, master);
dspi = spi_master_get_devdata(master);
if (dspi == NULL) {
@@ -933,6 +932,7 @@ static int davinci_spi_probe(struct platform_device *pdev)
master->dev.of_node = pdev->dev.of_node;
master->bus_num = pdev->id;
master->num_chipselect = pdata->num_chipselect;
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(2, 16);
master->setup = davinci_spi_setup;
dspi->bitbang.chipselect = davinci_spi_chipselect;
@@ -1044,7 +1044,7 @@ static int davinci_spi_remove(struct platform_device *pdev)
struct spi_master *master;
struct resource *r;
- master = dev_get_drvdata(&pdev->dev);
+ master = platform_get_drvdata(pdev);
dspi = spi_master_get_devdata(master);
spi_bitbang_stop(&dspi->bitbang);
diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index 4a6d5c9057a4..4aa8be865cc0 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -111,8 +111,6 @@ static int dw_spi_mmio_remove(struct platform_device *pdev)
struct dw_spi_mmio *dwsmmio = platform_get_drvdata(pdev);
struct resource *mem;
- platform_set_drvdata(pdev, NULL);
-
clk_disable(dwsmmio->clk);
clk_put(dwsmmio->clk);
dwsmmio->clk = NULL;
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index c1abc06899e7..79c958e49f61 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -457,19 +457,7 @@ static void pump_transfers(unsigned long data)
}
if (transfer->bits_per_word) {
bits = transfer->bits_per_word;
-
- switch (bits) {
- case 8:
- case 16:
- dws->n_bytes = dws->dma_width = bits >> 3;
- break;
- default:
- printk(KERN_ERR "MRST SPI0: unsupported bits:"
- "%db\n", bits);
- message->status = -EIO;
- goto early_exit;
- }
-
+ dws->n_bytes = dws->dma_width = bits >> 3;
cr0 = (bits - 1)
| (chip->type << SPI_FRF_OFFSET)
| (spi->mode << SPI_MODE_OFFSET)
@@ -629,9 +617,6 @@ static int dw_spi_setup(struct spi_device *spi)
struct dw_spi_chip *chip_info = NULL;
struct chip_data *chip;
- if (spi->bits_per_word != 8 && spi->bits_per_word != 16)
- return -EINVAL;
-
/* Only alloc on first setup */
chip = spi_get_ctldata(spi);
if (!chip) {
@@ -660,16 +645,12 @@ static int dw_spi_setup(struct spi_device *spi)
chip->enable_dma = chip_info->enable_dma;
}
- if (spi->bits_per_word <= 8) {
+ if (spi->bits_per_word == 8) {
chip->n_bytes = 1;
chip->dma_width = 1;
- } else if (spi->bits_per_word <= 16) {
+ } else if (spi->bits_per_word == 16) {
chip->n_bytes = 2;
chip->dma_width = 2;
- } else {
- /* Never take >16b case for MRST SPIC */
- dev_err(&spi->dev, "invalid wordsize\n");
- return -EINVAL;
}
chip->bits_per_word = spi->bits_per_word;
@@ -824,6 +805,7 @@ int dw_spi_add_host(struct dw_spi *dws)
}
master->mode_bits = SPI_CPOL | SPI_CPHA;
+ master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
master->bus_num = dws->bus_num;
master->num_chipselect = dws->num_cs;
master->cleanup = dw_spi_cleanup;
diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c
index d7bac60253c9..cad30b8a1d71 100644
--- a/drivers/spi/spi-ep93xx.c
+++ b/drivers/spi/spi-ep93xx.c
@@ -296,12 +296,6 @@ static int ep93xx_spi_setup(struct spi_device *spi)
struct ep93xx_spi *espi = spi_master_get_devdata(spi->master);
struct ep93xx_spi_chip *chip;
- if (spi->bits_per_word < 4 || spi->bits_per_word > 16) {
- dev_err(&espi->pdev->dev, "invalid bits per word %d\n",
- spi->bits_per_word);
- return -EINVAL;
- }
-
chip = spi_get_ctldata(spi);
if (!chip) {
dev_dbg(&espi->pdev->dev, "initial setup for %s\n",
@@ -365,10 +359,6 @@ static int ep93xx_spi_transfer(struct spi_device *spi, struct spi_message *msg)
/* first validate each transfer */
list_for_each_entry(t, &msg->transfers, transfer_list) {
- if (t->bits_per_word) {
- if (t->bits_per_word < 4 || t->bits_per_word > 16)
- return -EINVAL;
- }
if (t->speed_hz && t->speed_hz < espi->min_rate)
return -EINVAL;
}
@@ -1046,6 +1036,7 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
master->bus_num = pdev->id;
master->num_chipselect = info->num_chipselect;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
platform_set_drvdata(pdev, master);
@@ -1104,6 +1095,7 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
espi->wq = create_singlethread_workqueue("ep93xx_spid");
if (!espi->wq) {
dev_err(&pdev->dev, "unable to create workqueue\n");
+ error = -ENOMEM;
goto fail_free_dma;
}
INIT_WORK(&espi->msg_work, ep93xx_spi_work);
@@ -1132,7 +1124,6 @@ fail_put_clock:
clk_put(espi->clk);
fail_release_master:
spi_master_put(master);
- platform_set_drvdata(pdev, NULL);
return error;
}
@@ -1167,7 +1158,6 @@ static int ep93xx_spi_remove(struct platform_device *pdev)
ep93xx_spi_release_dma(espi);
clk_put(espi->clk);
- platform_set_drvdata(pdev, NULL);
spi_unregister_master(master);
return 0;
diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index 24610ca8955d..6a74d7848d93 100644
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -144,10 +144,6 @@ static int fsl_espi_setup_transfer(struct spi_device *spi,
if (!bits_per_word)
bits_per_word = spi->bits_per_word;
- /* Make sure its a bit width we support [4..16] */
- if ((bits_per_word < 4) || (bits_per_word > 16))
- return -EINVAL;
-
if (!hz)
hz = spi->max_speed_hz;
@@ -157,12 +153,10 @@ static int fsl_espi_setup_transfer(struct spi_device *spi,
cs->get_tx = mpc8xxx_spi_tx_buf_u32;
if (bits_per_word <= 8) {
cs->rx_shift = 8 - bits_per_word;
- } else if (bits_per_word <= 16) {
+ } else {
cs->rx_shift = 16 - bits_per_word;
if (spi->mode & SPI_LSB_FIRST)
cs->get_tx = fsl_espi_tx_buf_lsb;
- } else {
- return -EINVAL;
}
mpc8xxx_spi->rx_shift = cs->rx_shift;
@@ -609,6 +603,7 @@ static struct spi_master * fsl_espi_probe(struct device *dev,
if (ret)
goto err_probe;
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
master->setup = fsl_espi_setup;
mpc8xxx_spi = spi_master_get_devdata(master);
diff --git a/drivers/spi/spi-fsl-lib.c b/drivers/spi/spi-fsl-lib.c
index a91db0e57b23..e947f2d1b2f5 100644
--- a/drivers/spi/spi-fsl-lib.c
+++ b/drivers/spi/spi-fsl-lib.c
@@ -61,7 +61,7 @@ struct mpc8xxx_spi_probe_info *to_of_pinfo(struct fsl_spi_platform_data *pdata)
return container_of(pdata, struct mpc8xxx_spi_probe_info, pdata);
}
-void mpc8xxx_spi_work(struct work_struct *work)
+static void mpc8xxx_spi_work(struct work_struct *work)
{
struct mpc8xxx_spi *mpc8xxx_spi = container_of(work, struct mpc8xxx_spi,
work);
diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index 14e202ee7036..41e89c3e3edc 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -853,7 +853,7 @@ err:
static int of_fsl_spi_remove(struct platform_device *ofdev)
{
- struct spi_master *master = dev_get_drvdata(&ofdev->dev);
+ struct spi_master *master = platform_get_drvdata(ofdev);
struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(master);
int ret;
diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c
index 0021fc4c45bc..a54524cf42cc 100644
--- a/drivers/spi/spi-gpio.c
+++ b/drivers/spi/spi-gpio.c
@@ -239,9 +239,6 @@ static int spi_gpio_setup(struct spi_device *spi)
struct spi_gpio *spi_gpio = spi_to_spi_gpio(spi);
struct device_node *np = spi->master->dev.of_node;
- if (spi->bits_per_word > 32)
- return -EINVAL;
-
if (np) {
/*
* In DT environments, the CS GPIOs have already been
@@ -446,6 +443,7 @@ static int spi_gpio_probe(struct platform_device *pdev)
if (pdata)
spi_gpio->pdata = *pdata;
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32);
master->flags = master_flags;
master->bus_num = pdev->id;
master->num_chipselect = SPI_N_CHIPSEL;
@@ -514,8 +512,6 @@ static int spi_gpio_remove(struct platform_device *pdev)
status = spi_bitbang_stop(&spi_gpio->bitbang);
spi_master_put(spi_gpio->bitbang.master);
- platform_set_drvdata(pdev, NULL);
-
if (SPI_MISO_GPIO != SPI_GPIO_NO_MISO)
gpio_free(SPI_MISO_GPIO);
if (SPI_MOSI_GPIO != SPI_GPIO_NO_MOSI)
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 0befeeb522f4..7db4f43ee4d8 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -37,7 +37,6 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
-#include <linux/pinctrl/consumer.h>
#include <linux/platform_data/spi-imx.h>
@@ -698,11 +697,10 @@ static int spi_imx_setupxfer(struct spi_device *spi,
} else if (config.bpw <= 16) {
spi_imx->rx = spi_imx_buf_rx_u16;
spi_imx->tx = spi_imx_buf_tx_u16;
- } else if (config.bpw <= 32) {
+ } else {
spi_imx->rx = spi_imx_buf_rx_u32;
spi_imx->tx = spi_imx_buf_tx_u32;
- } else
- BUG();
+ }
spi_imx->devtype_data->config(spi_imx, &config);
@@ -760,7 +758,6 @@ static int spi_imx_probe(struct platform_device *pdev)
struct spi_master *master;
struct spi_imx_data *spi_imx;
struct resource *res;
- struct pinctrl *pinctrl;
int i, ret, num_cs;
if (!np && !mxc_platform_info) {
@@ -783,6 +780,7 @@ static int spi_imx_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, master);
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32);
master->bus_num = pdev->id;
master->num_chipselect = num_cs;
@@ -848,12 +846,6 @@ static int spi_imx_probe(struct platform_device *pdev)
goto out_iounmap;
}
- pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
- if (IS_ERR(pinctrl)) {
- ret = PTR_ERR(pinctrl);
- goto out_free_irq;
- }
-
spi_imx->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
if (IS_ERR(spi_imx->clk_ipg)) {
ret = PTR_ERR(spi_imx->clk_ipg);
@@ -902,7 +894,6 @@ out_gpio_free:
}
spi_master_put(master);
kfree(master);
- platform_set_drvdata(pdev, NULL);
return ret;
}
@@ -929,8 +920,6 @@ static int spi_imx_remove(struct platform_device *pdev)
release_mem_region(res->start, resource_size(res));
- platform_set_drvdata(pdev, NULL);
-
return 0;
}
diff --git a/drivers/spi/spi-mpc512x-psc.c b/drivers/spi/spi-mpc512x-psc.c
index dfddf336912d..29fce6af5145 100644
--- a/drivers/spi/spi-mpc512x-psc.c
+++ b/drivers/spi/spi-mpc512x-psc.c
@@ -21,7 +21,6 @@
#include <linux/interrupt.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
-#include <linux/workqueue.h>
#include <linux/completion.h>
#include <linux/io.h>
#include <linux/delay.h>
@@ -33,24 +32,15 @@
struct mpc512x_psc_spi {
void (*cs_control)(struct spi_device *spi, bool on);
- u32 sysclk;
/* driver internal data */
struct mpc52xx_psc __iomem *psc;
struct mpc512x_psc_fifo __iomem *fifo;
unsigned int irq;
u8 bits_per_word;
- u8 busy;
u32 mclk;
- u8 eofbyte;
- struct workqueue_struct *workqueue;
- struct work_struct work;
-
- struct list_head queue;
- spinlock_t lock; /* Message queue lock */
-
- struct completion done;
+ struct completion txisrdone;
};
/* controller state */
@@ -136,145 +126,223 @@ static int mpc512x_psc_spi_transfer_rxtx(struct spi_device *spi,
struct spi_transfer *t)
{
struct mpc512x_psc_spi *mps = spi_master_get_devdata(spi->master);
- struct mpc52xx_psc __iomem *psc = mps->psc;
struct mpc512x_psc_fifo __iomem *fifo = mps->fifo;
- size_t len = t->len;
+ size_t tx_len = t->len;
+ size_t rx_len = t->len;
u8 *tx_buf = (u8 *)t->tx_buf;
u8 *rx_buf = (u8 *)t->rx_buf;
if (!tx_buf && !rx_buf && t->len)
return -EINVAL;
- /* Zero MR2 */
- in_8(&psc->mode);
- out_8(&psc->mode, 0x0);
-
- /* enable transmiter/receiver */
- out_8(&psc->command, MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
-
- while (len) {
- int count;
- int i;
+ while (rx_len || tx_len) {
+ size_t txcount;
u8 data;
size_t fifosz;
- int rxcount;
+ size_t rxcount;
+ int rxtries;
/*
- * The number of bytes that can be sent at a time
- * depends on the fifo size.
+ * send the TX bytes in as large a chunk as possible
+ * but neither exceed the TX nor the RX FIFOs
*/
fifosz = MPC512x_PSC_FIFO_SZ(in_be32(&fifo->txsz));
- count = min(fifosz, len);
-
- for (i = count; i > 0; i--) {
- data = tx_buf ? *tx_buf++ : 0;
- if (len == EOFBYTE && t->cs_change)
- setbits32(&fifo->txcmd, MPC512x_PSC_FIFO_EOF);
- out_8(&fifo->txdata_8, data);
- len--;
+ txcount = min(fifosz, tx_len);
+ fifosz = MPC512x_PSC_FIFO_SZ(in_be32(&fifo->rxsz));
+ fifosz -= in_be32(&fifo->rxcnt) + 1;
+ txcount = min(fifosz, txcount);
+ if (txcount) {
+
+ /* fill the TX FIFO */
+ while (txcount-- > 0) {
+ data = tx_buf ? *tx_buf++ : 0;
+ if (tx_len == EOFBYTE && t->cs_change)
+ setbits32(&fifo->txcmd,
+ MPC512x_PSC_FIFO_EOF);
+ out_8(&fifo->txdata_8, data);
+ tx_len--;
+ }
+
+ /* have the ISR trigger when the TX FIFO is empty */
+ INIT_COMPLETION(mps->txisrdone);
+ out_be32(&fifo->txisr, MPC512x_PSC_FIFO_EMPTY);
+ out_be32(&fifo->tximr, MPC512x_PSC_FIFO_EMPTY);
+ wait_for_completion(&mps->txisrdone);
}
- INIT_COMPLETION(mps->done);
+ /*
+ * consume as much RX data as the FIFO holds, while we
+ * iterate over the transfer's TX data length
+ *
+ * only insist in draining all the remaining RX bytes
+ * when the TX bytes were exhausted (that's at the very
+ * end of this transfer, not when still iterating over
+ * the transfer's chunks)
+ */
+ rxtries = 50;
+ do {
+
+ /*
+ * grab whatever was in the FIFO when we started
+ * looking, don't bother fetching what was added to
+ * the FIFO while we read from it -- we'll return
+ * here eventually and prefer sending out remaining
+ * TX data
+ */
+ fifosz = in_be32(&fifo->rxcnt);
+ rxcount = min(fifosz, rx_len);
+ while (rxcount-- > 0) {
+ data = in_8(&fifo->rxdata_8);
+ if (rx_buf)
+ *rx_buf++ = data;
+ rx_len--;
+ }
- /* interrupt on tx fifo empty */
- out_be32(&fifo->txisr, MPC512x_PSC_FIFO_EMPTY);
- out_be32(&fifo->tximr, MPC512x_PSC_FIFO_EMPTY);
+ /*
+ * come back later if there still is TX data to send,
+ * bail out of the RX drain loop if all of the TX data
+ * was sent and all of the RX data was received (i.e.
+ * when the transmission has completed)
+ */
+ if (tx_len)
+ break;
+ if (!rx_len)
+ break;
- wait_for_completion(&mps->done);
+ /*
+ * TX data transmission has completed while RX data
+ * is still pending -- that's a transient situation
+ * which depends on wire speed and specific
+ * hardware implementation details (buffering) yet
+ * should resolve very quickly
+ *
+ * just yield for a moment to not hog the CPU for
+ * too long when running SPI at low speed
+ *
+ * the timeout range is rather arbitrary and tries
+ * to balance throughput against system load; the
+ * chosen values result in a minimal timeout of 50
+ * times 10us and thus work at speeds as low as
+ * some 20kbps, while the maximum timeout at the
+ * transfer's end could be 5ms _if_ nothing else
+ * ticks in the system _and_ RX data still wasn't
+ * received, which only occurs in situations that
+ * are exceptional; removing the unpredictability
+ * of the timeout either decreases throughput
+ * (longer timeouts), or puts more load on the
+ * system (fixed short timeouts) or requires the
+ * use of a timeout API instead of a counter and an
+ * unknown inner delay
+ */
+ usleep_range(10, 100);
+
+ } while (--rxtries > 0);
+ if (!tx_len && rx_len && !rxtries) {
+ /*
+ * not enough RX bytes even after several retries
+ * and the resulting rather long timeout?
+ */
+ rxcount = in_be32(&fifo->rxcnt);
+ dev_warn(&spi->dev,
+ "short xfer, missing %zd RX bytes, FIFO level %zd\n",
+ rx_len, rxcount);
+ }
- mdelay(1);
+ /*
+ * drain and drop RX data which "should not be there" in
+ * the first place, for undisturbed transmission this turns
+ * into a NOP (except for the FIFO level fetch)
+ */
+ if (!tx_len && !rx_len) {
+ while (in_be32(&fifo->rxcnt))
+ in_8(&fifo->rxdata_8);
+ }
- /* rx fifo should have count bytes in it */
- rxcount = in_be32(&fifo->rxcnt);
- if (rxcount != count)
- mdelay(1);
+ }
+ return 0;
+}
- rxcount = in_be32(&fifo->rxcnt);
- if (rxcount != count) {
- dev_warn(&spi->dev, "expected %d bytes in rx fifo "
- "but got %d\n", count, rxcount);
+static int mpc512x_psc_spi_msg_xfer(struct spi_master *master,
+ struct spi_message *m)
+{
+ struct spi_device *spi;
+ unsigned cs_change;
+ int status;
+ struct spi_transfer *t;
+
+ spi = m->spi;
+ cs_change = 1;
+ status = 0;
+ list_for_each_entry(t, &m->transfers, transfer_list) {
+ if (t->bits_per_word || t->speed_hz) {
+ status = mpc512x_psc_spi_transfer_setup(spi, t);
+ if (status < 0)
+ break;
}
- rxcount = min(rxcount, count);
- for (i = rxcount; i > 0; i--) {
- data = in_8(&fifo->rxdata_8);
- if (rx_buf)
- *rx_buf++ = data;
- }
- while (in_be32(&fifo->rxcnt)) {
- in_8(&fifo->rxdata_8);
- }
+ if (cs_change)
+ mpc512x_psc_spi_activate_cs(spi);
+ cs_change = t->cs_change;
+
+ status = mpc512x_psc_spi_transfer_rxtx(spi, t);
+ if (status)
+ break;
+ m->actual_length += t->len;
+
+ if (t->delay_usecs)
+ udelay(t->delay_usecs);
+
+ if (cs_change)
+ mpc512x_psc_spi_deactivate_cs(spi);
}
- /* disable transmiter/receiver and fifo interrupt */
- out_8(&psc->command, MPC52xx_PSC_TX_DISABLE | MPC52xx_PSC_RX_DISABLE);
- out_be32(&fifo->tximr, 0);
- return 0;
+
+ m->status = status;
+ m->complete(m->context);
+
+ if (status || !cs_change)
+ mpc512x_psc_spi_deactivate_cs(spi);
+
+ mpc512x_psc_spi_transfer_setup(spi, NULL);
+
+ spi_finalize_current_message(master);
+ return status;
}
-static void mpc512x_psc_spi_work(struct work_struct *work)
+static int mpc512x_psc_spi_prep_xfer_hw(struct spi_master *master)
{
- struct mpc512x_psc_spi *mps = container_of(work,
- struct mpc512x_psc_spi,
- work);
-
- spin_lock_irq(&mps->lock);
- mps->busy = 1;
- while (!list_empty(&mps->queue)) {
- struct spi_message *m;
- struct spi_device *spi;
- struct spi_transfer *t = NULL;
- unsigned cs_change;
- int status;
-
- m = container_of(mps->queue.next, struct spi_message, queue);
- list_del_init(&m->queue);
- spin_unlock_irq(&mps->lock);
-
- spi = m->spi;
- cs_change = 1;
- status = 0;
- list_for_each_entry(t, &m->transfers, transfer_list) {
- if (t->bits_per_word || t->speed_hz) {
- status = mpc512x_psc_spi_transfer_setup(spi, t);
- if (status < 0)
- break;
- }
+ struct mpc512x_psc_spi *mps = spi_master_get_devdata(master);
+ struct mpc52xx_psc __iomem *psc = mps->psc;
- if (cs_change)
- mpc512x_psc_spi_activate_cs(spi);
- cs_change = t->cs_change;
+ dev_dbg(&master->dev, "%s()\n", __func__);
- status = mpc512x_psc_spi_transfer_rxtx(spi, t);
- if (status)
- break;
- m->actual_length += t->len;
+ /* Zero MR2 */
+ in_8(&psc->mode);
+ out_8(&psc->mode, 0x0);
- if (t->delay_usecs)
- udelay(t->delay_usecs);
+ /* enable transmitter/receiver */
+ out_8(&psc->command, MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
- if (cs_change)
- mpc512x_psc_spi_deactivate_cs(spi);
- }
+ return 0;
+}
- m->status = status;
- m->complete(m->context);
+static int mpc512x_psc_spi_unprep_xfer_hw(struct spi_master *master)
+{
+ struct mpc512x_psc_spi *mps = spi_master_get_devdata(master);
+ struct mpc52xx_psc __iomem *psc = mps->psc;
+ struct mpc512x_psc_fifo __iomem *fifo = mps->fifo;
- if (status || !cs_change)
- mpc512x_psc_spi_deactivate_cs(spi);
+ dev_dbg(&master->dev, "%s()\n", __func__);
- mpc512x_psc_spi_transfer_setup(spi, NULL);
+ /* disable transmitter/receiver and fifo interrupt */
+ out_8(&psc->command, MPC52xx_PSC_TX_DISABLE | MPC52xx_PSC_RX_DISABLE);
+ out_be32(&fifo->tximr, 0);
- spin_lock_irq(&mps->lock);
- }
- mps->busy = 0;
- spin_unlock_irq(&mps->lock);
+ return 0;
}
static int mpc512x_psc_spi_setup(struct spi_device *spi)
{
- struct mpc512x_psc_spi *mps = spi_master_get_devdata(spi->master);
struct mpc512x_psc_spi_cs *cs = spi->controller_state;
- unsigned long flags;
int ret;
if (spi->bits_per_word % 8)
@@ -303,28 +371,6 @@ static int mpc512x_psc_spi_setup(struct spi_device *spi)
cs->bits_per_word = spi->bits_per_word;
cs->speed_hz = spi->max_speed_hz;
- spin_lock_irqsave(&mps->lock, flags);
- if (!mps->busy)
- mpc512x_psc_spi_deactivate_cs(spi);
- spin_unlock_irqrestore(&mps->lock, flags);
-
- return 0;
-}
-
-static int mpc512x_psc_spi_transfer(struct spi_device *spi,
- struct spi_message *m)
-{
- struct mpc512x_psc_spi *mps = spi_master_get_devdata(spi->master);
- unsigned long flags;
-
- m->actual_length = 0;
- m->status = -EINPROGRESS;
-
- spin_lock_irqsave(&mps->lock, flags);
- list_add_tail(&m->queue, &mps->queue);
- queue_work(mps->workqueue, &mps->work);
- spin_unlock_irqrestore(&mps->lock, flags);
-
return 0;
}
@@ -407,12 +453,12 @@ static irqreturn_t mpc512x_psc_spi_isr(int irq, void *dev_id)
struct mpc512x_psc_spi *mps = (struct mpc512x_psc_spi *)dev_id;
struct mpc512x_psc_fifo __iomem *fifo = mps->fifo;
- /* clear interrupt and wake up the work queue */
+ /* clear interrupt and wake up the rx/tx routine */
if (in_be32(&fifo->txisr) &
in_be32(&fifo->tximr) & MPC512x_PSC_FIFO_EMPTY) {
out_be32(&fifo->txisr, MPC512x_PSC_FIFO_EMPTY);
out_be32(&fifo->tximr, 0);
- complete(&mps->done);
+ complete(&mps->txisrdone);
return IRQ_HANDLED;
}
return IRQ_NONE;
@@ -444,18 +490,18 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
if (pdata == NULL) {
mps->cs_control = mpc512x_spi_cs_control;
- mps->sysclk = 0;
master->bus_num = bus_num;
} else {
mps->cs_control = pdata->cs_control;
- mps->sysclk = pdata->sysclk;
master->bus_num = pdata->bus_num;
master->num_chipselect = pdata->max_chipselect;
}
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST;
master->setup = mpc512x_psc_spi_setup;
- master->transfer = mpc512x_psc_spi_transfer;
+ master->prepare_transfer_hardware = mpc512x_psc_spi_prep_xfer_hw;
+ master->transfer_one_message = mpc512x_psc_spi_msg_xfer;
+ master->unprepare_transfer_hardware = mpc512x_psc_spi_unprep_xfer_hw;
master->cleanup = mpc512x_psc_spi_cleanup;
master->dev.of_node = dev->of_node;
@@ -473,31 +519,18 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
"mpc512x-psc-spi", mps);
if (ret)
goto free_master;
+ init_completion(&mps->txisrdone);
ret = mpc512x_psc_spi_port_config(master, mps);
if (ret < 0)
goto free_irq;
- spin_lock_init(&mps->lock);
- init_completion(&mps->done);
- INIT_WORK(&mps->work, mpc512x_psc_spi_work);
- INIT_LIST_HEAD(&mps->queue);
-
- mps->workqueue =
- create_singlethread_workqueue(dev_name(master->dev.parent));
- if (mps->workqueue == NULL) {
- ret = -EBUSY;
- goto free_irq;
- }
-
ret = spi_register_master(master);
if (ret < 0)
- goto unreg_master;
+ goto free_irq;
return ret;
-unreg_master:
- destroy_workqueue(mps->workqueue);
free_irq:
free_irq(mps->irq, mps);
free_master:
@@ -513,8 +546,6 @@ static int mpc512x_psc_spi_do_remove(struct device *dev)
struct spi_master *master = spi_master_get(dev_get_drvdata(dev));
struct mpc512x_psc_spi *mps = spi_master_get_devdata(master);
- flush_workqueue(mps->workqueue);
- destroy_workqueue(mps->workqueue);
spi_unregister_master(master);
free_irq(mps->irq, mps);
if (mps->psc)
diff --git a/drivers/spi/spi-mpc52xx-psc.c b/drivers/spi/spi-mpc52xx-psc.c
index 291120b37dbb..fed0571d4dec 100644
--- a/drivers/spi/spi-mpc52xx-psc.c
+++ b/drivers/spi/spi-mpc52xx-psc.c
@@ -481,7 +481,7 @@ static int mpc52xx_psc_spi_of_probe(struct platform_device *op)
static int mpc52xx_psc_spi_of_remove(struct platform_device *op)
{
- struct spi_master *master = spi_master_get(dev_get_drvdata(&op->dev));
+ struct spi_master *master = spi_master_get(platform_get_drvdata(op));
struct mpc52xx_psc_spi *mps = spi_master_get_devdata(master);
flush_workqueue(mps->workqueue);
diff --git a/drivers/spi/spi-mpc52xx.c b/drivers/spi/spi-mpc52xx.c
index 29f77056eedc..7c675fe83101 100644
--- a/drivers/spi/spi-mpc52xx.c
+++ b/drivers/spi/spi-mpc52xx.c
@@ -438,7 +438,7 @@ static int mpc52xx_spi_probe(struct platform_device *op)
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
master->dev.of_node = op->dev.of_node;
- dev_set_drvdata(&op->dev, master);
+ platform_set_drvdata(op, master);
ms = spi_master_get_devdata(master);
ms->master = master;
@@ -529,7 +529,7 @@ static int mpc52xx_spi_probe(struct platform_device *op)
static int mpc52xx_spi_remove(struct platform_device *op)
{
- struct spi_master *master = spi_master_get(dev_get_drvdata(&op->dev));
+ struct spi_master *master = spi_master_get(platform_get_drvdata(op));
struct mpc52xx_spi *ms = spi_master_get_devdata(master);
int i;
diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index 84982768cd10..424d38e59421 100644
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -46,7 +46,6 @@
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
-#include <linux/pinctrl/consumer.h>
#include <linux/stmp_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/mxs-spi.h>
@@ -75,12 +74,6 @@ static int mxs_spi_setup_transfer(struct spi_device *dev,
if (t && t->bits_per_word)
bits_per_word = t->bits_per_word;
- if (bits_per_word != 8) {
- dev_err(&dev->dev, "%s, unsupported bits_per_word=%d\n",
- __func__, bits_per_word);
- return -EINVAL;
- }
-
hz = dev->max_speed_hz;
if (t && t->speed_hz)
hz = min(hz, t->speed_hz);
@@ -506,7 +499,6 @@ static int mxs_spi_probe(struct platform_device *pdev)
struct mxs_spi *spi;
struct mxs_ssp *ssp;
struct resource *iores;
- struct pinctrl *pinctrl;
struct clk *clk;
void __iomem *base;
int devid, clk_freq;
@@ -528,10 +520,6 @@ static int mxs_spi_probe(struct platform_device *pdev)
if (IS_ERR(base))
return PTR_ERR(base);
- pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
- if (IS_ERR(pinctrl))
- return PTR_ERR(pinctrl);
-
clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(clk))
return PTR_ERR(clk);
@@ -548,6 +536,7 @@ static int mxs_spi_probe(struct platform_device *pdev)
master->transfer_one_message = mxs_spi_transfer_one;
master->setup = mxs_spi_setup;
+ master->bits_per_word_mask = SPI_BPW_MASK(8);
master->mode_bits = SPI_CPOL | SPI_CPHA;
master->num_chipselect = 3;
master->dev.of_node = np;
diff --git a/drivers/spi/spi-nuc900.c b/drivers/spi/spi-nuc900.c
index b3f9ec83ef73..2ad3d74ac021 100644
--- a/drivers/spi/spi-nuc900.c
+++ b/drivers/spi/spi-nuc900.c
@@ -174,17 +174,6 @@ static void nuc900_spi_gobusy(struct nuc900_spi *hw)
spin_unlock_irqrestore(&hw->lock, flags);
}
-static int nuc900_spi_setupxfer(struct spi_device *spi,
- struct spi_transfer *t)
-{
- return 0;
-}
-
-static int nuc900_spi_setup(struct spi_device *spi)
-{
- return 0;
-}
-
static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count)
{
return hw->tx ? hw->tx[count] : 0;
@@ -377,10 +366,8 @@ static int nuc900_spi_probe(struct platform_device *pdev)
master->num_chipselect = hw->pdata->num_cs;
master->bus_num = hw->pdata->bus_num;
hw->bitbang.master = hw->master;
- hw->bitbang.setup_transfer = nuc900_spi_setupxfer;
hw->bitbang.chipselect = nuc900_spi_chipsel;
hw->bitbang.txrx_bufs = nuc900_spi_txrx;
- hw->bitbang.master->setup = nuc900_spi_setup;
hw->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (hw->res == NULL) {
@@ -459,8 +446,6 @@ static int nuc900_spi_remove(struct platform_device *dev)
free_irq(hw->irq, hw);
- platform_set_drvdata(dev, NULL);
-
spi_bitbang_stop(&hw->bitbang);
clk_disable(hw->clk);
diff --git a/drivers/spi/spi-oc-tiny.c b/drivers/spi/spi-oc-tiny.c
index e60a776ed2d4..58deb79d046b 100644
--- a/drivers/spi/spi-oc-tiny.c
+++ b/drivers/spi/spi-oc-tiny.c
@@ -368,7 +368,6 @@ exit_gpio:
exit_busy:
err = -EBUSY;
exit:
- platform_set_drvdata(pdev, NULL);
spi_master_put(master);
return err;
}
@@ -382,7 +381,6 @@ static int tiny_spi_remove(struct platform_device *pdev)
spi_bitbang_stop(&hw->bitbang);
for (i = 0; i < hw->gpio_cs_count; i++)
gpio_free(hw->gpio_cs[i]);
- platform_set_drvdata(pdev, NULL);
spi_master_put(master);
return 0;
}
diff --git a/drivers/spi/spi-omap-100k.c b/drivers/spi/spi-omap-100k.c
index 78d29a18dcc4..ee25670f8cfd 100644
--- a/drivers/spi/spi-omap-100k.c
+++ b/drivers/spi/spi-omap-100k.c
@@ -298,12 +298,6 @@ static int omap1_spi100k_setup(struct spi_device *spi)
struct omap1_spi100k *spi100k;
struct omap1_spi100k_cs *cs = spi->controller_state;
- if (spi->bits_per_word < 4 || spi->bits_per_word > 32) {
- dev_dbg(&spi->dev, "setup: unsupported %d bit words\n",
- spi->bits_per_word);
- return -EINVAL;
- }
-
spi100k = spi_master_get_devdata(spi->master);
if (!cs) {
@@ -451,10 +445,7 @@ static int omap1_spi100k_transfer(struct spi_device *spi, struct spi_message *m)
unsigned len = t->len;
if (t->speed_hz > OMAP1_SPI100K_MAX_FREQ
- || (len && !(rx_buf || tx_buf))
- || (t->bits_per_word &&
- ( t->bits_per_word < 4
- || t->bits_per_word > 32))) {
+ || (len && !(rx_buf || tx_buf))) {
dev_dbg(&spi->dev, "transfer: %d Hz, %d %s%s, %d bpw\n",
t->speed_hz,
len,
@@ -509,8 +500,9 @@ static int omap1_spi100k_probe(struct platform_device *pdev)
master->cleanup = NULL;
master->num_chipselect = 2;
master->mode_bits = MODEBITS;
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
- dev_set_drvdata(&pdev->dev, master);
+ platform_set_drvdata(pdev, master);
spi100k = spi_master_get_devdata(master);
spi100k->master = master;
@@ -569,7 +561,7 @@ static int omap1_spi100k_remove(struct platform_device *pdev)
unsigned long flags;
int status = 0;
- master = dev_get_drvdata(&pdev->dev);
+ master = platform_get_drvdata(pdev);
spi100k = spi_master_get_devdata(master);
spin_lock_irqsave(&spi100k->lock, flags);
diff --git a/drivers/spi/spi-omap-uwire.c b/drivers/spi/spi-omap-uwire.c
index 102b233b50c4..a6a8f0961750 100644
--- a/drivers/spi/spi-omap-uwire.c
+++ b/drivers/spi/spi-omap-uwire.c
@@ -495,7 +495,7 @@ static int uwire_probe(struct platform_device *pdev)
return -ENOMEM;
}
- dev_set_drvdata(&pdev->dev, uwire);
+ platform_set_drvdata(pdev, uwire);
uwire->ck = clk_get(&pdev->dev, "fck");
if (IS_ERR(uwire->ck)) {
@@ -538,7 +538,7 @@ static int uwire_probe(struct platform_device *pdev)
static int uwire_remove(struct platform_device *pdev)
{
- struct uwire_spi *uwire = dev_get_drvdata(&pdev->dev);
+ struct uwire_spi *uwire = platform_get_drvdata(pdev);
int status;
// FIXME remove all child devices, somewhere ...
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 86d2158946bb..5994039758de 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -38,13 +38,15 @@
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_device.h>
-#include <linux/pinctrl/consumer.h>
+#include <linux/gcd.h>
#include <linux/spi/spi.h>
#include <linux/platform_data/spi-omap2-mcspi.h>
#define OMAP2_MCSPI_MAX_FREQ 48000000
+#define OMAP2_MCSPI_MAX_FIFODEPTH 64
+#define OMAP2_MCSPI_MAX_FIFOWCNT 0xFFFF
#define SPI_AUTOSUSPEND_TIMEOUT 2000
#define OMAP2_MCSPI_REVISION 0x00
@@ -54,6 +56,7 @@
#define OMAP2_MCSPI_WAKEUPENABLE 0x20
#define OMAP2_MCSPI_SYST 0x24
#define OMAP2_MCSPI_MODULCTRL 0x28
+#define OMAP2_MCSPI_XFERLEVEL 0x7c
/* per-channel banks, 0x14 bytes each, first is: */
#define OMAP2_MCSPI_CHCONF0 0x2c
@@ -63,6 +66,7 @@
#define OMAP2_MCSPI_RX0 0x3c
/* per-register bitmasks: */
+#define OMAP2_MCSPI_IRQSTATUS_EOW BIT(17)
#define OMAP2_MCSPI_MODULCTRL_SINGLE BIT(0)
#define OMAP2_MCSPI_MODULCTRL_MS BIT(2)
@@ -83,10 +87,13 @@
#define OMAP2_MCSPI_CHCONF_IS BIT(18)
#define OMAP2_MCSPI_CHCONF_TURBO BIT(19)
#define OMAP2_MCSPI_CHCONF_FORCE BIT(20)
+#define OMAP2_MCSPI_CHCONF_FFET BIT(27)
+#define OMAP2_MCSPI_CHCONF_FFER BIT(28)
#define OMAP2_MCSPI_CHSTAT_RXS BIT(0)
#define OMAP2_MCSPI_CHSTAT_TXS BIT(1)
#define OMAP2_MCSPI_CHSTAT_EOT BIT(2)
+#define OMAP2_MCSPI_CHSTAT_TXFFE BIT(3)
#define OMAP2_MCSPI_CHCTRL_EN BIT(0)
@@ -102,6 +109,9 @@ struct omap2_mcspi_dma {
struct completion dma_tx_completion;
struct completion dma_rx_completion;
+
+ char dma_rx_ch_name[14];
+ char dma_tx_ch_name[14];
};
/* use PIO for small transfers, avoiding DMA setup/teardown overhead and
@@ -129,6 +139,7 @@ struct omap2_mcspi {
struct omap2_mcspi_dma *dma_channels;
struct device *dev;
struct omap2_mcspi_regs ctx;
+ int fifo_depth;
unsigned int pin_dir:1;
};
@@ -187,6 +198,16 @@ static inline void mcspi_write_chconf0(const struct spi_device *spi, u32 val)
mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHCONF0);
}
+static inline int mcspi_bytes_per_word(int word_len)
+{
+ if (word_len <= 8)
+ return 1;
+ else if (word_len <= 16)
+ return 2;
+ else /* word_len <= 32 */
+ return 4;
+}
+
static void omap2_mcspi_set_dma_req(const struct spi_device *spi,
int is_read, int enable)
{
@@ -248,6 +269,58 @@ static void omap2_mcspi_set_master_mode(struct spi_master *master)
ctx->modulctrl = l;
}
+static void omap2_mcspi_set_fifo(const struct spi_device *spi,
+ struct spi_transfer *t, int enable)
+{
+ struct spi_master *master = spi->master;
+ struct omap2_mcspi_cs *cs = spi->controller_state;
+ struct omap2_mcspi *mcspi;
+ unsigned int wcnt;
+ int fifo_depth, bytes_per_word;
+ u32 chconf, xferlevel;
+
+ mcspi = spi_master_get_devdata(master);
+
+ chconf = mcspi_cached_chconf0(spi);
+ if (enable) {
+ bytes_per_word = mcspi_bytes_per_word(cs->word_len);
+ if (t->len % bytes_per_word != 0)
+ goto disable_fifo;
+
+ fifo_depth = gcd(t->len, OMAP2_MCSPI_MAX_FIFODEPTH);
+ if (fifo_depth < 2 || fifo_depth % bytes_per_word != 0)
+ goto disable_fifo;
+
+ wcnt = t->len / bytes_per_word;
+ if (wcnt > OMAP2_MCSPI_MAX_FIFOWCNT)
+ goto disable_fifo;
+
+ xferlevel = wcnt << 16;
+ if (t->rx_buf != NULL) {
+ chconf |= OMAP2_MCSPI_CHCONF_FFER;
+ xferlevel |= (fifo_depth - 1) << 8;
+ } else {
+ chconf |= OMAP2_MCSPI_CHCONF_FFET;
+ xferlevel |= fifo_depth - 1;
+ }
+
+ mcspi_write_reg(master, OMAP2_MCSPI_XFERLEVEL, xferlevel);
+ mcspi_write_chconf0(spi, chconf);
+ mcspi->fifo_depth = fifo_depth;
+
+ return;
+ }
+
+disable_fifo:
+ if (t->rx_buf != NULL)
+ chconf &= ~OMAP2_MCSPI_CHCONF_FFER;
+ else
+ chconf &= ~OMAP2_MCSPI_CHCONF_FFET;
+
+ mcspi_write_chconf0(spi, chconf);
+ mcspi->fifo_depth = 0;
+}
+
static void omap2_mcspi_restore_ctx(struct omap2_mcspi *mcspi)
{
struct spi_master *spi_cntrl = mcspi->master;
@@ -364,7 +437,7 @@ omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer,
{
struct omap2_mcspi *mcspi;
struct omap2_mcspi_dma *mcspi_dma;
- unsigned int count;
+ unsigned int count, dma_count;
u32 l;
int elements = 0;
int word_len, element_count;
@@ -372,6 +445,11 @@ omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer,
mcspi = spi_master_get_devdata(spi->master);
mcspi_dma = &mcspi->dma_channels[spi->chip_select];
count = xfer->len;
+ dma_count = xfer->len;
+
+ if (mcspi->fifo_depth == 0)
+ dma_count -= es;
+
word_len = cs->word_len;
l = mcspi_cached_chconf0(spi);
@@ -385,16 +463,15 @@ omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer,
if (mcspi_dma->dma_rx) {
struct dma_async_tx_descriptor *tx;
struct scatterlist sg;
- size_t len = xfer->len - es;
dmaengine_slave_config(mcspi_dma->dma_rx, &cfg);
- if (l & OMAP2_MCSPI_CHCONF_TURBO)
- len -= es;
+ if ((l & OMAP2_MCSPI_CHCONF_TURBO) && mcspi->fifo_depth == 0)
+ dma_count -= es;
sg_init_table(&sg, 1);
sg_dma_address(&sg) = xfer->rx_dma;
- sg_dma_len(&sg) = len;
+ sg_dma_len(&sg) = dma_count;
tx = dmaengine_prep_slave_sg(mcspi_dma->dma_rx, &sg, 1,
DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT |
@@ -414,6 +491,10 @@ omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer,
wait_for_completion(&mcspi_dma->dma_rx_completion);
dma_unmap_single(mcspi->dev, xfer->rx_dma, count,
DMA_FROM_DEVICE);
+
+ if (mcspi->fifo_depth > 0)
+ return count;
+
omap2_mcspi_set_enable(spi, 0);
elements = element_count - 1;
@@ -433,10 +514,9 @@ omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer,
else /* word_len <= 32 */
((u32 *)xfer->rx_buf)[elements++] = w;
} else {
+ int bytes_per_word = mcspi_bytes_per_word(word_len);
dev_err(&spi->dev, "DMA RX penultimate word empty");
- count -= (word_len <= 8) ? 2 :
- (word_len <= 16) ? 4 :
- /* word_len <= 32 */ 8;
+ count -= (bytes_per_word << 1);
omap2_mcspi_set_enable(spi, 1);
return count;
}
@@ -454,9 +534,7 @@ omap2_mcspi_rx_dma(struct spi_device *spi, struct spi_transfer *xfer,
((u32 *)xfer->rx_buf)[elements] = w;
} else {
dev_err(&spi->dev, "DMA RX last word empty");
- count -= (word_len <= 8) ? 1 :
- (word_len <= 16) ? 2 :
- /* word_len <= 32 */ 4;
+ count -= mcspi_bytes_per_word(word_len);
}
omap2_mcspi_set_enable(spi, 1);
return count;
@@ -475,7 +553,10 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
struct dma_slave_config cfg;
enum dma_slave_buswidth width;
unsigned es;
+ u32 burst;
void __iomem *chstat_reg;
+ void __iomem *irqstat_reg;
+ int wait_res;
mcspi = spi_master_get_devdata(spi->master);
mcspi_dma = &mcspi->dma_channels[spi->chip_select];
@@ -493,19 +574,27 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
es = 4;
}
+ count = xfer->len;
+ burst = 1;
+
+ if (mcspi->fifo_depth > 0) {
+ if (count > mcspi->fifo_depth)
+ burst = mcspi->fifo_depth / es;
+ else
+ burst = count / es;
+ }
+
memset(&cfg, 0, sizeof(cfg));
cfg.src_addr = cs->phys + OMAP2_MCSPI_RX0;
cfg.dst_addr = cs->phys + OMAP2_MCSPI_TX0;
cfg.src_addr_width = width;
cfg.dst_addr_width = width;
- cfg.src_maxburst = 1;
- cfg.dst_maxburst = 1;
+ cfg.src_maxburst = burst;
+ cfg.dst_maxburst = burst;
rx = xfer->rx_buf;
tx = xfer->tx_buf;
- count = xfer->len;
-
if (tx != NULL)
omap2_mcspi_tx_dma(spi, xfer, cfg);
@@ -513,18 +602,38 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
count = omap2_mcspi_rx_dma(spi, xfer, cfg, es);
if (tx != NULL) {
- chstat_reg = cs->base + OMAP2_MCSPI_CHSTAT0;
wait_for_completion(&mcspi_dma->dma_tx_completion);
dma_unmap_single(mcspi->dev, xfer->tx_dma, xfer->len,
DMA_TO_DEVICE);
+ if (mcspi->fifo_depth > 0) {
+ irqstat_reg = mcspi->base + OMAP2_MCSPI_IRQSTATUS;
+
+ if (mcspi_wait_for_reg_bit(irqstat_reg,
+ OMAP2_MCSPI_IRQSTATUS_EOW) < 0)
+ dev_err(&spi->dev, "EOW timed out\n");
+
+ mcspi_write_reg(mcspi->master, OMAP2_MCSPI_IRQSTATUS,
+ OMAP2_MCSPI_IRQSTATUS_EOW);
+ }
+
/* for TX_ONLY mode, be sure all words have shifted out */
if (rx == NULL) {
- if (mcspi_wait_for_reg_bit(chstat_reg,
- OMAP2_MCSPI_CHSTAT_TXS) < 0)
- dev_err(&spi->dev, "TXS timed out\n");
- else if (mcspi_wait_for_reg_bit(chstat_reg,
- OMAP2_MCSPI_CHSTAT_EOT) < 0)
+ chstat_reg = cs->base + OMAP2_MCSPI_CHSTAT0;
+ if (mcspi->fifo_depth > 0) {
+ wait_res = mcspi_wait_for_reg_bit(chstat_reg,
+ OMAP2_MCSPI_CHSTAT_TXFFE);
+ if (wait_res < 0)
+ dev_err(&spi->dev, "TXFFE timed out\n");
+ } else {
+ wait_res = mcspi_wait_for_reg_bit(chstat_reg,
+ OMAP2_MCSPI_CHSTAT_TXS);
+ if (wait_res < 0)
+ dev_err(&spi->dev, "TXS timed out\n");
+ }
+ if (wait_res >= 0 &&
+ (mcspi_wait_for_reg_bit(chstat_reg,
+ OMAP2_MCSPI_CHSTAT_EOT) < 0))
dev_err(&spi->dev, "EOT timed out\n");
}
}
@@ -830,12 +939,20 @@ static int omap2_mcspi_request_dma(struct spi_device *spi)
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
sig = mcspi_dma->dma_rx_sync_dev;
- mcspi_dma->dma_rx = dma_request_channel(mask, omap_dma_filter_fn, &sig);
+
+ mcspi_dma->dma_rx =
+ dma_request_slave_channel_compat(mask, omap_dma_filter_fn,
+ &sig, &master->dev,
+ mcspi_dma->dma_rx_ch_name);
if (!mcspi_dma->dma_rx)
goto no_dma;
sig = mcspi_dma->dma_tx_sync_dev;
- mcspi_dma->dma_tx = dma_request_channel(mask, omap_dma_filter_fn, &sig);
+ mcspi_dma->dma_tx =
+ dma_request_slave_channel_compat(mask, omap_dma_filter_fn,
+ &sig, &master->dev,
+ mcspi_dma->dma_tx_ch_name);
+
if (!mcspi_dma->dma_tx) {
dma_release_channel(mcspi_dma->dma_rx);
mcspi_dma->dma_rx = NULL;
@@ -857,12 +974,6 @@ static int omap2_mcspi_setup(struct spi_device *spi)
struct omap2_mcspi_dma *mcspi_dma;
struct omap2_mcspi_cs *cs = spi->controller_state;
- if (spi->bits_per_word < 4 || spi->bits_per_word > 32) {
- dev_dbg(&spi->dev, "setup: unsupported %d bit words\n",
- spi->bits_per_word);
- return -EINVAL;
- }
-
mcspi_dma = &mcspi->dma_channels[spi->chip_select];
if (!cs) {
@@ -951,7 +1062,7 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
cs = spi->controller_state;
cd = spi->controller_data;
- omap2_mcspi_set_enable(spi, 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;
@@ -999,6 +1110,12 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
if (t->len) {
unsigned count;
+ if ((mcspi_dma->dma_rx && mcspi_dma->dma_tx) &&
+ (m->is_dma_mapped || t->len >= DMA_MIN_BYTES))
+ omap2_mcspi_set_fifo(spi, t, 1);
+
+ omap2_mcspi_set_enable(spi, 1);
+
/* RX_ONLY mode needs dummy data in TX reg */
if (t->tx_buf == NULL)
__raw_writel(0, cs->base
@@ -1025,6 +1142,11 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
omap2_mcspi_force_cs(spi, 0);
cs_active = 0;
}
+
+ omap2_mcspi_set_enable(spi, 0);
+
+ if (mcspi->fifo_depth > 0)
+ omap2_mcspi_set_fifo(spi, t, 0);
}
/* Restore defaults if they were overriden */
if (par_override) {
@@ -1045,8 +1167,10 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
omap2_mcspi_set_enable(spi, 0);
- m->status = status;
+ if (mcspi->fifo_depth > 0 && t)
+ omap2_mcspi_set_fifo(spi, t, 0);
+ m->status = status;
}
static int omap2_mcspi_transfer_one_message(struct spi_master *master,
@@ -1072,10 +1196,7 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
unsigned len = t->len;
if (t->speed_hz > OMAP2_MCSPI_MAX_FREQ
- || (len && !(rx_buf || tx_buf))
- || (t->bits_per_word &&
- ( t->bits_per_word < 4
- || t->bits_per_word > 32))) {
+ || (len && !(rx_buf || tx_buf))) {
dev_dbg(mcspi->dev, "transfer: %d Hz, %d %s%s, %d bpw\n",
t->speed_hz,
len,
@@ -1186,7 +1307,6 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
static int bus_num = 1;
struct device_node *node = pdev->dev.of_node;
const struct of_device_id *match;
- struct pinctrl *pinctrl;
master = spi_alloc_master(&pdev->dev, sizeof *mcspi);
if (master == NULL) {
@@ -1196,7 +1316,7 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
-
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
master->setup = omap2_mcspi_setup;
master->prepare_transfer_hardware = omap2_prepare_transfer;
master->unprepare_transfer_hardware = omap2_unprepare_transfer;
@@ -1204,7 +1324,7 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
master->cleanup = omap2_mcspi_cleanup;
master->dev.of_node = node;
- dev_set_drvdata(&pdev->dev, master);
+ platform_set_drvdata(pdev, master);
mcspi = spi_master_get_devdata(master);
mcspi->master = master;
@@ -1256,39 +1376,47 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
goto free_master;
for (i = 0; i < master->num_chipselect; i++) {
- char dma_ch_name[14];
+ char *dma_rx_ch_name = mcspi->dma_channels[i].dma_rx_ch_name;
+ char *dma_tx_ch_name = mcspi->dma_channels[i].dma_tx_ch_name;
struct resource *dma_res;
- sprintf(dma_ch_name, "rx%d", i);
- dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA,
- dma_ch_name);
- if (!dma_res) {
- dev_dbg(&pdev->dev, "cannot get DMA RX channel\n");
- status = -ENODEV;
- break;
- }
+ sprintf(dma_rx_ch_name, "rx%d", i);
+ if (!pdev->dev.of_node) {
+ dma_res =
+ platform_get_resource_byname(pdev,
+ IORESOURCE_DMA,
+ dma_rx_ch_name);
+ if (!dma_res) {
+ dev_dbg(&pdev->dev,
+ "cannot get DMA RX channel\n");
+ status = -ENODEV;
+ break;
+ }
- mcspi->dma_channels[i].dma_rx_sync_dev = dma_res->start;
- sprintf(dma_ch_name, "tx%d", i);
- dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA,
- dma_ch_name);
- if (!dma_res) {
- dev_dbg(&pdev->dev, "cannot get DMA TX channel\n");
- status = -ENODEV;
- break;
+ mcspi->dma_channels[i].dma_rx_sync_dev =
+ dma_res->start;
}
+ sprintf(dma_tx_ch_name, "tx%d", i);
+ if (!pdev->dev.of_node) {
+ dma_res =
+ platform_get_resource_byname(pdev,
+ IORESOURCE_DMA,
+ dma_tx_ch_name);
+ if (!dma_res) {
+ dev_dbg(&pdev->dev,
+ "cannot get DMA TX channel\n");
+ status = -ENODEV;
+ break;
+ }
- mcspi->dma_channels[i].dma_tx_sync_dev = dma_res->start;
+ mcspi->dma_channels[i].dma_tx_sync_dev =
+ dma_res->start;
+ }
}
if (status < 0)
goto dma_chnl_free;
- pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
- if (IS_ERR(pinctrl))
- dev_warn(&pdev->dev,
- "pins are not configured from the driver\n");
-
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
pm_runtime_enable(&pdev->dev);
@@ -1318,7 +1446,7 @@ static int omap2_mcspi_remove(struct platform_device *pdev)
struct omap2_mcspi *mcspi;
struct omap2_mcspi_dma *dma_channels;
- master = dev_get_drvdata(&pdev->dev);
+ master = platform_get_drvdata(pdev);
mcspi = spi_master_get_devdata(master);
dma_channels = mcspi->dma_channels;
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index 66a5f82cf138..5d90bebaa0fa 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -428,7 +428,7 @@ static int orion_spi_probe(struct platform_device *pdev)
master->transfer_one_message = orion_spi_transfer_one_message;
master->num_chipselect = ORION_NUM_CHIPSELECTS;
- dev_set_drvdata(&pdev->dev, master);
+ platform_set_drvdata(pdev, master);
spi = spi_master_get_devdata(master);
spi->master = master;
@@ -485,7 +485,7 @@ static int orion_spi_remove(struct platform_device *pdev)
struct resource *r;
struct orion_spi *spi;
- master = dev_get_drvdata(&pdev->dev);
+ master = platform_get_drvdata(pdev);
spi = spi_master_get_devdata(master);
clk_disable_unprepare(spi->clk);
diff --git a/drivers/spi/spi-ppc4xx.c b/drivers/spi/spi-ppc4xx.c
index 357f183a4fb7..0ee53c25ba58 100644
--- a/drivers/spi/spi-ppc4xx.c
+++ b/drivers/spi/spi-ppc4xx.c
@@ -190,12 +190,6 @@ static int spi_ppc4xx_setupxfer(struct spi_device *spi, struct spi_transfer *t)
speed = min(t->speed_hz, spi->max_speed_hz);
}
- if (bits_per_word != 8) {
- dev_err(&spi->dev, "invalid bits-per-word (%d)\n",
- bits_per_word);
- return -EINVAL;
- }
-
if (!speed || (speed > spi->max_speed_hz)) {
dev_err(&spi->dev, "invalid speed_hz (%d)\n", speed);
return -EINVAL;
@@ -229,12 +223,6 @@ static int spi_ppc4xx_setup(struct spi_device *spi)
{
struct spi_ppc4xx_cs *cs = spi->controller_state;
- if (spi->bits_per_word != 8) {
- dev_err(&spi->dev, "invalid bits-per-word (%d)\n",
- spi->bits_per_word);
- return -EINVAL;
- }
-
if (!spi->max_speed_hz) {
dev_err(&spi->dev, "invalid max_speed_hz (must be non-zero)\n");
return -EINVAL;
@@ -406,7 +394,7 @@ static int spi_ppc4xx_of_probe(struct platform_device *op)
if (master == NULL)
return -ENOMEM;
master->dev.of_node = np;
- dev_set_drvdata(dev, master);
+ platform_set_drvdata(op, master);
hw = spi_master_get_devdata(master);
hw->master = spi_master_get(master);
hw->dev = dev;
@@ -465,6 +453,7 @@ static int spi_ppc4xx_of_probe(struct platform_device *op)
bbp->use_dma = 0;
bbp->master->setup = spi_ppc4xx_setup;
bbp->master->cleanup = spi_ppc4xx_cleanup;
+ bbp->master->bits_per_word_mask = SPI_BPW_MASK(8);
/* the spi->mode bits understood by this driver: */
bbp->master->mode_bits =
@@ -553,7 +542,6 @@ request_mem_error:
free_gpios:
free_gpios(hw);
free_master:
- dev_set_drvdata(dev, NULL);
spi_master_put(master);
dev_err(dev, "initialization failed\n");
@@ -562,11 +550,10 @@ free_master:
static int spi_ppc4xx_of_remove(struct platform_device *op)
{
- struct spi_master *master = dev_get_drvdata(&op->dev);
+ struct spi_master *master = platform_get_drvdata(op);
struct ppc4xx_spi *hw = spi_master_get_devdata(master);
spi_bitbang_stop(&hw->bitbang);
- dev_set_drvdata(&op->dev, NULL);
release_mem_region(hw->mapbase, hw->mapsize);
free_irq(hw->irqnum, hw);
iounmap(hw->regs);
diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c
index 6427600b5bbe..3c0b55125f1e 100644
--- a/drivers/spi/spi-pxa2xx-dma.c
+++ b/drivers/spi/spi-pxa2xx-dma.c
@@ -327,22 +327,23 @@ void pxa2xx_spi_dma_start(struct driver_data *drv_data)
int pxa2xx_spi_dma_setup(struct driver_data *drv_data)
{
struct pxa2xx_spi_master *pdata = drv_data->master_info;
+ struct device *dev = &drv_data->pdev->dev;
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
- drv_data->dummy = devm_kzalloc(&drv_data->pdev->dev, SZ_2K, GFP_KERNEL);
+ drv_data->dummy = devm_kzalloc(dev, SZ_2K, GFP_KERNEL);
if (!drv_data->dummy)
return -ENOMEM;
- drv_data->tx_chan = dma_request_channel(mask, pxa2xx_spi_dma_filter,
- pdata);
+ drv_data->tx_chan = dma_request_slave_channel_compat(mask,
+ pxa2xx_spi_dma_filter, pdata, dev, "tx");
if (!drv_data->tx_chan)
return -ENODEV;
- drv_data->rx_chan = dma_request_channel(mask, pxa2xx_spi_dma_filter,
- pdata);
+ drv_data->rx_chan = dma_request_slave_channel_compat(mask,
+ pxa2xx_spi_dma_filter, pdata, dev, "rx");
if (!drv_data->rx_chan) {
dma_release_channel(drv_data->tx_chan);
drv_data->tx_chan = NULL;
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index 48b396fced0a..f440dcee852b 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -881,21 +881,6 @@ static int setup(struct spi_device *spi)
rx_thres = RX_THRESH_DFLT;
}
- if (!pxa25x_ssp_comp(drv_data)
- && (spi->bits_per_word < 4 || spi->bits_per_word > 32)) {
- dev_err(&spi->dev, "failed setup: ssp_type=%d, bits/wrd=%d "
- "b/w not 4-32 for type non-PXA25x_SSP\n",
- drv_data->ssp_type, spi->bits_per_word);
- return -EINVAL;
- } else if (pxa25x_ssp_comp(drv_data)
- && (spi->bits_per_word < 4
- || spi->bits_per_word > 16)) {
- dev_err(&spi->dev, "failed setup: ssp_type=%d, bits/wrd=%d "
- "b/w not 4-16 for type PXA25x_SSP\n",
- drv_data->ssp_type, spi->bits_per_word);
- return -EINVAL;
- }
-
/* Only alloc on first setup */
chip = spi_get_ctldata(spi);
if (!chip) {
@@ -1011,9 +996,6 @@ static int setup(struct spi_device *spi)
chip->n_bytes = 4;
chip->read = u32_reader;
chip->write = u32_writer;
- } else {
- dev_err(&spi->dev, "invalid wordsize\n");
- return -ENODEV;
}
chip->bits_per_word = spi->bits_per_word;
@@ -1040,32 +1022,10 @@ static void cleanup(struct spi_device *spi)
}
#ifdef CONFIG_ACPI
-static int pxa2xx_spi_acpi_add_dma(struct acpi_resource *res, void *data)
-{
- struct pxa2xx_spi_master *pdata = data;
-
- if (res->type == ACPI_RESOURCE_TYPE_FIXED_DMA) {
- const struct acpi_resource_fixed_dma *dma;
-
- dma = &res->data.fixed_dma;
- if (pdata->tx_slave_id < 0) {
- pdata->tx_slave_id = dma->request_lines;
- pdata->tx_chan_id = dma->channels;
- } else if (pdata->rx_slave_id < 0) {
- pdata->rx_slave_id = dma->request_lines;
- pdata->rx_chan_id = dma->channels;
- }
- }
-
- /* Tell the ACPI core to skip this resource */
- return 1;
-}
-
static struct pxa2xx_spi_master *
pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
{
struct pxa2xx_spi_master *pdata;
- struct list_head resource_list;
struct acpi_device *adev;
struct ssp_device *ssp;
struct resource *res;
@@ -1091,7 +1051,7 @@ pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
ssp->phys_base = res->start;
ssp->mmio_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(ssp->mmio_base))
- return PTR_ERR(ssp->mmio_base);
+ return NULL;
ssp->clk = devm_clk_get(&pdev->dev, NULL);
ssp->irq = platform_get_irq(pdev, 0);
@@ -1103,15 +1063,7 @@ pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
ssp->port_id = devid;
pdata->num_chipselect = 1;
- pdata->rx_slave_id = -1;
- pdata->tx_slave_id = -1;
-
- INIT_LIST_HEAD(&resource_list);
- acpi_dev_get_resources(adev, &resource_list, pxa2xx_spi_acpi_add_dma,
- pdata);
- acpi_dev_free_resource_list(&resource_list);
-
- pdata->enable_dma = pdata->rx_slave_id >= 0 && pdata->tx_slave_id >= 0;
+ pdata->enable_dma = true;
return pdata;
}
@@ -1119,6 +1071,7 @@ pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
static struct acpi_device_id pxa2xx_spi_acpi_match[] = {
{ "INT33C0", 0 },
{ "INT33C1", 0 },
+ { "80860F0E", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, pxa2xx_spi_acpi_match);
@@ -1190,11 +1143,13 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
drv_data->ioaddr = ssp->mmio_base;
drv_data->ssdr_physical = ssp->phys_base + SSDR;
if (pxa25x_ssp_comp(drv_data)) {
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
drv_data->int_cr1 = SSCR1_TIE | SSCR1_RIE;
drv_data->dma_cr1 = 0;
drv_data->clear_sr = SSSR_ROR;
drv_data->mask_sr = SSSR_RFS | SSSR_TFS | SSSR_ROR;
} else {
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
drv_data->int_cr1 = SSCR1_TIE | SSCR1_RIE | SSCR1_TINTE;
drv_data->dma_cr1 = DEFAULT_DMA_CR1;
drv_data->clear_sr = SSSR_ROR | SSSR_TINT;
@@ -1214,7 +1169,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
if (platform_info->enable_dma) {
status = pxa2xx_spi_dma_setup(drv_data);
if (status) {
- dev_warn(dev, "failed to setup DMA, using PIO\n");
+ dev_dbg(dev, "no DMA channels available, using PIO\n");
platform_info->enable_dma = false;
}
}
@@ -1299,9 +1254,6 @@ static int pxa2xx_spi_remove(struct platform_device *pdev)
/* Disconnect from the SPI framework */
spi_unregister_master(drv_data->master);
- /* Prevent double remove */
- platform_set_drvdata(pdev, NULL);
-
return 0;
}
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index 902f2fb902db..b44a6ac3cec9 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -719,7 +719,7 @@ static void rspi_release_dma(struct rspi_data *rspi)
static int rspi_remove(struct platform_device *pdev)
{
- struct rspi_data *rspi = dev_get_drvdata(&pdev->dev);
+ struct rspi_data *rspi = platform_get_drvdata(pdev);
spi_unregister_master(rspi->master);
rspi_release_dma(rspi);
@@ -759,7 +759,7 @@ static int rspi_probe(struct platform_device *pdev)
}
rspi = spi_master_get_devdata(master);
- dev_set_drvdata(&pdev->dev, rspi);
+ platform_set_drvdata(pdev, rspi);
rspi->master = master;
rspi->addr = ioremap(res->start, resource_size(res));
diff --git a/drivers/spi/spi-s3c24xx.c b/drivers/spi/spi-s3c24xx.c
index 02d64603fcc5..68910b310152 100644
--- a/drivers/spi/spi-s3c24xx.c
+++ b/drivers/spi/spi-s3c24xx.c
@@ -667,8 +667,6 @@ static int s3c24xx_spi_remove(struct platform_device *dev)
{
struct s3c24xx_spi *hw = platform_get_drvdata(dev);
- platform_set_drvdata(dev, NULL);
-
spi_bitbang_stop(&hw->bitbang);
clk_disable(hw->clk);
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 71cc3e6ef47c..eb53df27e7ea 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -39,6 +39,7 @@
#endif
#define MAX_SPI_PORTS 3
+#define S3C64XX_SPI_QUIRK_POLL (1 << 0)
/* Registers and bit-fields */
@@ -130,6 +131,7 @@
#define S3C64XX_SPI_TRAILCNT S3C64XX_SPI_MAX_TRAILCNT
#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
+#define is_polling(x) (x->port_conf->quirks & S3C64XX_SPI_QUIRK_POLL)
#define RXBUSY (1<<2)
#define TXBUSY (1<<3)
@@ -158,6 +160,7 @@ struct s3c64xx_spi_port_config {
int fifo_lvl_mask[MAX_SPI_PORTS];
int rx_lvl_offset;
int tx_st_done;
+ int quirks;
bool high_speed;
bool clk_from_cmu;
};
@@ -205,6 +208,7 @@ struct s3c64xx_spi_driver_data {
struct s3c64xx_spi_port_config *port_conf;
unsigned int port_id;
unsigned long gpios[4];
+ bool cs_gpio;
};
static void flush_fifo(struct s3c64xx_spi_driver_data *sdd)
@@ -344,8 +348,12 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi)
{
struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);
- /* Acquire DMA channels */
- while (!acquire_dma(sdd))
+ /*
+ * If DMA resource was not available during
+ * probe, no need to continue with dma requests
+ * else Acquire DMA channels
+ */
+ while (!is_polling(sdd) && !acquire_dma(sdd))
usleep_range(10000, 11000);
pm_runtime_get_sync(&sdd->pdev->dev);
@@ -358,9 +366,12 @@ static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi)
struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);
/* Free DMA channels */
- sdd->ops->release((enum dma_ch)sdd->rx_dma.ch, &s3c64xx_spi_dma_client);
- sdd->ops->release((enum dma_ch)sdd->tx_dma.ch, &s3c64xx_spi_dma_client);
-
+ if (!is_polling(sdd)) {
+ sdd->ops->release((enum dma_ch)sdd->rx_dma.ch,
+ &s3c64xx_spi_dma_client);
+ sdd->ops->release((enum dma_ch)sdd->tx_dma.ch,
+ &s3c64xx_spi_dma_client);
+ }
pm_runtime_put(&sdd->pdev->dev);
return 0;
@@ -464,8 +475,10 @@ static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi)
struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);
/* Free DMA channels */
- dma_release_channel(sdd->rx_dma.ch);
- dma_release_channel(sdd->tx_dma.ch);
+ if (!is_polling(sdd)) {
+ dma_release_channel(sdd->rx_dma.ch);
+ dma_release_channel(sdd->tx_dma.ch);
+ }
pm_runtime_put(&sdd->pdev->dev);
return 0;
@@ -558,14 +571,40 @@ static inline void enable_cs(struct s3c64xx_spi_driver_data *sdd,
if (sdd->tgl_spi != spi) { /* if last mssg on diff device */
/* Deselect the last toggled device */
cs = sdd->tgl_spi->controller_data;
- gpio_set_value(cs->line,
- spi->mode & SPI_CS_HIGH ? 0 : 1);
+ if (sdd->cs_gpio)
+ gpio_set_value(cs->line,
+ spi->mode & SPI_CS_HIGH ? 0 : 1);
}
sdd->tgl_spi = NULL;
}
cs = spi->controller_data;
- gpio_set_value(cs->line, spi->mode & SPI_CS_HIGH ? 1 : 0);
+ if (sdd->cs_gpio)
+ gpio_set_value(cs->line, spi->mode & SPI_CS_HIGH ? 1 : 0);
+
+ /* Start the signals */
+ writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
+}
+
+static u32 s3c64xx_spi_wait_for_timeout(struct s3c64xx_spi_driver_data *sdd,
+ int timeout_ms)
+{
+ void __iomem *regs = sdd->regs;
+ unsigned long val = 1;
+ u32 status;
+
+ /* max fifo depth available */
+ u32 max_fifo = (FIFO_LVL_MASK(sdd) >> 1) + 1;
+
+ if (timeout_ms)
+ val = msecs_to_loops(timeout_ms);
+
+ do {
+ status = readl(regs + S3C64XX_SPI_STATUS);
+ } while (RX_FIFO_LVL(status, sdd) < max_fifo && --val);
+
+ /* return the actual received data length */
+ return RX_FIFO_LVL(status, sdd);
}
static int wait_for_xfer(struct s3c64xx_spi_driver_data *sdd,
@@ -590,20 +629,19 @@ static int wait_for_xfer(struct s3c64xx_spi_driver_data *sdd,
} while (RX_FIFO_LVL(status, sdd) < xfer->len && --val);
}
- if (!val)
- return -EIO;
-
if (dma_mode) {
u32 status;
/*
+ * If the previous xfer was completed within timeout, then
+ * proceed further else return -EIO.
* DmaTx returns after simply writing data in the FIFO,
* w/o waiting for real transmission on the bus to finish.
* DmaRx returns only after Dma read data from FIFO which
* needs bus transmission to finish, so we don't worry if
* Xfer involved Rx(with or without Tx).
*/
- if (xfer->rx_buf == NULL) {
+ if (val && !xfer->rx_buf) {
val = msecs_to_loops(10);
status = readl(regs + S3C64XX_SPI_STATUS);
while ((TX_FIFO_LVL(status, sdd)
@@ -613,30 +651,54 @@ static int wait_for_xfer(struct s3c64xx_spi_driver_data *sdd,
status = readl(regs + S3C64XX_SPI_STATUS);
}
- if (!val)
- return -EIO;
}
+
+ /* If timed out while checking rx/tx status return error */
+ if (!val)
+ return -EIO;
} else {
+ int loops;
+ u32 cpy_len;
+ u8 *buf;
+
/* If it was only Tx */
- if (xfer->rx_buf == NULL) {
+ if (!xfer->rx_buf) {
sdd->state &= ~TXBUSY;
return 0;
}
- switch (sdd->cur_bpw) {
- case 32:
- ioread32_rep(regs + S3C64XX_SPI_RX_DATA,
- xfer->rx_buf, xfer->len / 4);
- break;
- case 16:
- ioread16_rep(regs + S3C64XX_SPI_RX_DATA,
- xfer->rx_buf, xfer->len / 2);
- break;
- default:
- ioread8_rep(regs + S3C64XX_SPI_RX_DATA,
- xfer->rx_buf, xfer->len);
- break;
- }
+ /*
+ * If the receive length is bigger than the controller fifo
+ * size, calculate the loops and read the fifo as many times.
+ * loops = length / max fifo size (calculated by using the
+ * fifo mask).
+ * For any size less than the fifo size the below code is
+ * executed atleast once.
+ */
+ loops = xfer->len / ((FIFO_LVL_MASK(sdd) >> 1) + 1);
+ buf = xfer->rx_buf;
+ do {
+ /* wait for data to be received in the fifo */
+ cpy_len = s3c64xx_spi_wait_for_timeout(sdd,
+ (loops ? ms : 0));
+
+ switch (sdd->cur_bpw) {
+ case 32:
+ ioread32_rep(regs + S3C64XX_SPI_RX_DATA,
+ buf, cpy_len / 4);
+ break;
+ case 16:
+ ioread16_rep(regs + S3C64XX_SPI_RX_DATA,
+ buf, cpy_len / 2);
+ break;
+ default:
+ ioread8_rep(regs + S3C64XX_SPI_RX_DATA,
+ buf, cpy_len);
+ break;
+ }
+
+ buf = buf + cpy_len;
+ } while (loops--);
sdd->state &= ~RXBUSY;
}
@@ -651,7 +713,11 @@ static inline void disable_cs(struct s3c64xx_spi_driver_data *sdd,
if (sdd->tgl_spi == spi)
sdd->tgl_spi = NULL;
- gpio_set_value(cs->line, spi->mode & SPI_CS_HIGH ? 0 : 1);
+ if (sdd->cs_gpio)
+ gpio_set_value(cs->line, spi->mode & SPI_CS_HIGH ? 0 : 1);
+
+ /* Quiese the signals */
+ writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
}
static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
@@ -733,7 +799,7 @@ static int s3c64xx_spi_map_mssg(struct s3c64xx_spi_driver_data *sdd,
struct device *dev = &sdd->pdev->dev;
struct spi_transfer *xfer;
- if (msg->is_dma_mapped)
+ if (is_polling(sdd) || msg->is_dma_mapped)
return 0;
/* First mark all xfer unmapped */
@@ -782,7 +848,7 @@ static void s3c64xx_spi_unmap_mssg(struct s3c64xx_spi_driver_data *sdd,
struct device *dev = &sdd->pdev->dev;
struct spi_transfer *xfer;
- if (msg->is_dma_mapped)
+ if (is_polling(sdd) || msg->is_dma_mapped)
return;
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
@@ -861,8 +927,9 @@ static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
/* Polling method for xfers not bigger than FIFO capacity */
use_dma = 0;
- if (sdd->rx_dma.ch && sdd->tx_dma.ch &&
- (xfer->len > ((FIFO_LVL_MASK(sdd) >> 1) + 1)))
+ if (!is_polling(sdd) &&
+ (sdd->rx_dma.ch && sdd->tx_dma.ch &&
+ (xfer->len > ((FIFO_LVL_MASK(sdd) >> 1) + 1))))
use_dma = 1;
spin_lock_irqsave(&sdd->lock, flags);
@@ -876,17 +943,10 @@ static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
/* Slave Select */
enable_cs(sdd, spi);
- /* Start the signals */
- writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
-
spin_unlock_irqrestore(&sdd->lock, flags);
status = wait_for_xfer(sdd, xfer, use_dma);
- /* Quiese the signals */
- writel(S3C64XX_SPI_SLAVE_SIG_INACT,
- sdd->regs + S3C64XX_SPI_SLAVE_SEL);
-
if (status) {
dev_err(&spi->dev, "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0,
@@ -942,8 +1002,10 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata(
{
struct s3c64xx_spi_csinfo *cs;
struct device_node *slave_np, *data_np = NULL;
+ struct s3c64xx_spi_driver_data *sdd;
u32 fb_delay = 0;
+ sdd = spi_master_get_devdata(spi->master);
slave_np = spi->dev.of_node;
if (!slave_np) {
dev_err(&spi->dev, "device node not found\n");
@@ -963,7 +1025,10 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata(
return ERR_PTR(-ENOMEM);
}
- cs->line = of_get_named_gpio(data_np, "cs-gpio", 0);
+ /* The CS line is asserted/deasserted by the gpio pin */
+ if (sdd->cs_gpio)
+ cs->line = of_get_named_gpio(data_np, "cs-gpio", 0);
+
if (!gpio_is_valid(cs->line)) {
dev_err(&spi->dev, "chip select gpio is not specified or invalid\n");
kfree(cs);
@@ -1003,7 +1068,8 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
return -ENODEV;
}
- if (!spi_get_ctldata(spi)) {
+ /* Request gpio only if cs line is asserted by gpio pins */
+ if (sdd->cs_gpio) {
err = gpio_request_one(cs->line, GPIOF_OUT_INIT_HIGH,
dev_name(&spi->dev));
if (err) {
@@ -1012,9 +1078,11 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
cs->line, err);
goto err_gpio_req;
}
- spi_set_ctldata(spi, cs);
}
+ if (!spi_get_ctldata(spi))
+ spi_set_ctldata(spi, cs);
+
sci = sdd->cntrlr_info;
spin_lock_irqsave(&sdd->lock, flags);
@@ -1092,8 +1160,10 @@ err_gpio_req:
static void s3c64xx_spi_cleanup(struct spi_device *spi)
{
struct s3c64xx_spi_csinfo *cs = spi_get_ctldata(spi);
+ struct s3c64xx_spi_driver_data *sdd;
- if (cs) {
+ sdd = spi_master_get_devdata(spi->master);
+ if (cs && sdd->cs_gpio) {
gpio_free(cs->line);
if (spi->dev.of_node)
kfree(cs);
@@ -1270,7 +1340,11 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
sdd->cntrlr_info = sci;
sdd->pdev = pdev;
sdd->sfr_start = mem_res->start;
+ sdd->cs_gpio = true;
if (pdev->dev.of_node) {
+ if (!of_find_property(pdev->dev.of_node, "cs-gpio", NULL))
+ sdd->cs_gpio = false;
+
ret = of_alias_get_id(pdev->dev.of_node, "spi");
if (ret < 0) {
dev_err(&pdev->dev, "failed to get alias id, errno %d\n",
@@ -1287,19 +1361,19 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
if (!sdd->pdev->dev.of_node) {
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!res) {
- dev_err(&pdev->dev, "Unable to get SPI tx dma "
- "resource\n");
- return -ENXIO;
- }
- sdd->tx_dma.dmach = res->start;
+ dev_warn(&pdev->dev, "Unable to get SPI tx dma "
+ "resource. Switching to poll mode\n");
+ sdd->port_conf->quirks = S3C64XX_SPI_QUIRK_POLL;
+ } else
+ sdd->tx_dma.dmach = res->start;
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!res) {
- dev_err(&pdev->dev, "Unable to get SPI rx dma "
- "resource\n");
- return -ENXIO;
- }
- sdd->rx_dma.dmach = res->start;
+ dev_warn(&pdev->dev, "Unable to get SPI rx dma "
+ "resource. Switching to poll mode\n");
+ sdd->port_conf->quirks = S3C64XX_SPI_QUIRK_POLL;
+ } else
+ sdd->rx_dma.dmach = res->start;
}
sdd->tx_dma.direction = DMA_MEM_TO_DEV;
@@ -1314,7 +1388,8 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
master->unprepare_transfer_hardware = s3c64xx_spi_unprepare_transfer;
master->num_chipselect = sci->num_cs;
master->dma_alignment = 8;
- master->bits_per_word_mask = BIT(32 - 1) | BIT(16 - 1) | BIT(8 - 1);
+ master->bits_per_word_mask = SPI_BPW_MASK(32) | SPI_BPW_MASK(16) |
+ SPI_BPW_MASK(8);
/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
@@ -1399,7 +1474,6 @@ err3:
err2:
clk_disable_unprepare(sdd->clk);
err0:
- platform_set_drvdata(pdev, NULL);
spi_master_put(master);
return ret;
@@ -1420,7 +1494,6 @@ static int s3c64xx_spi_remove(struct platform_device *pdev)
clk_disable_unprepare(sdd->clk);
- platform_set_drvdata(pdev, NULL);
spi_master_put(master);
return 0;
@@ -1535,6 +1608,15 @@ static struct s3c64xx_spi_port_config exynos4_spi_port_config = {
.clk_from_cmu = true,
};
+static struct s3c64xx_spi_port_config exynos5440_spi_port_config = {
+ .fifo_lvl_mask = { 0x1ff },
+ .rx_lvl_offset = 15,
+ .tx_st_done = 25,
+ .high_speed = true,
+ .clk_from_cmu = true,
+ .quirks = S3C64XX_SPI_QUIRK_POLL,
+};
+
static struct platform_device_id s3c64xx_spi_driver_ids[] = {
{
.name = "s3c2443-spi",
@@ -1558,15 +1640,16 @@ static struct platform_device_id s3c64xx_spi_driver_ids[] = {
{ },
};
-#ifdef CONFIG_OF
static const struct of_device_id s3c64xx_spi_dt_match[] = {
{ .compatible = "samsung,exynos4210-spi",
.data = (void *)&exynos4_spi_port_config,
},
+ { .compatible = "samsung,exynos5440-spi",
+ .data = (void *)&exynos5440_spi_port_config,
+ },
{ },
};
MODULE_DEVICE_TABLE(of, s3c64xx_spi_dt_match);
-#endif /* CONFIG_OF */
static struct platform_driver s3c64xx_spi_driver = {
.driver = {
diff --git a/drivers/spi/spi-sh-hspi.c b/drivers/spi/spi-sh-hspi.c
index eab593eaaafa..716edf999538 100644
--- a/drivers/spi/spi-sh-hspi.c
+++ b/drivers/spi/spi-sh-hspi.c
@@ -297,7 +297,7 @@ static int hspi_probe(struct platform_device *pdev)
}
hspi = spi_master_get_devdata(master);
- dev_set_drvdata(&pdev->dev, hspi);
+ platform_set_drvdata(pdev, hspi);
/* init hspi */
hspi->master = master;
@@ -341,7 +341,7 @@ static int hspi_probe(struct platform_device *pdev)
static int hspi_remove(struct platform_device *pdev)
{
- struct hspi_priv *hspi = dev_get_drvdata(&pdev->dev);
+ struct hspi_priv *hspi = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
diff --git a/drivers/spi/spi-sh.c b/drivers/spi/spi-sh.c
index 3c3600a994bd..c120a70094f2 100644
--- a/drivers/spi/spi-sh.c
+++ b/drivers/spi/spi-sh.c
@@ -434,7 +434,7 @@ static irqreturn_t spi_sh_irq(int irq, void *_ss)
static int spi_sh_remove(struct platform_device *pdev)
{
- struct spi_sh_data *ss = dev_get_drvdata(&pdev->dev);
+ struct spi_sh_data *ss = platform_get_drvdata(pdev);
spi_unregister_master(ss->master);
destroy_workqueue(ss->workqueue);
@@ -471,7 +471,7 @@ static int spi_sh_probe(struct platform_device *pdev)
}
ss = spi_master_get_devdata(master);
- dev_set_drvdata(&pdev->dev, ss);
+ platform_set_drvdata(pdev, ss);
switch (res->flags & IORESOURCE_MEM_TYPE_MASK) {
case IORESOURCE_MEM_8BIT:
diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c
index 0808cd56bf8d..fc20bcfd90c3 100644
--- a/drivers/spi/spi-sirf.c
+++ b/drivers/spi/spi-sirf.c
@@ -19,7 +19,6 @@
#include <linux/of_gpio.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi_bitbang.h>
-#include <linux/pinctrl/consumer.h>
#define DRIVER_NAME "sirfsoc_spi"
@@ -127,7 +126,6 @@ struct sirfsoc_spi {
void __iomem *base;
u32 ctrl_freq; /* SPI controller clock speed */
struct clk *clk;
- struct pinctrl *p;
/* rx & tx bufs from the spi_transfer */
const void *tx;
@@ -142,9 +140,6 @@ struct sirfsoc_spi {
unsigned int left_tx_cnt;
unsigned int left_rx_cnt;
- /* tasklet to push tx msg into FIFO */
- struct tasklet_struct tasklet_tx;
-
int chipselect[0];
};
@@ -236,17 +231,6 @@ static void spi_sirfsoc_tx_word_u32(struct sirfsoc_spi *sspi)
sspi->left_tx_cnt--;
}
-static void spi_sirfsoc_tasklet_tx(unsigned long arg)
-{
- struct sirfsoc_spi *sspi = (struct sirfsoc_spi *)arg;
-
- /* Fill Tx FIFO while there are left words to be transmitted */
- while (!((readl(sspi->base + SIRFSOC_SPI_TXFIFO_STATUS) &
- SIRFSOC_SPI_FIFO_FULL)) &&
- sspi->left_tx_cnt)
- sspi->tx_word(sspi);
-}
-
static irqreturn_t spi_sirfsoc_irq(int irq, void *dev_id)
{
struct sirfsoc_spi *sspi = dev_id;
@@ -261,25 +245,25 @@ static irqreturn_t spi_sirfsoc_irq(int irq, void *dev_id)
writel(0x0, sspi->base + SIRFSOC_SPI_INT_EN);
}
- if (spi_stat & SIRFSOC_SPI_FRM_END) {
+ if (spi_stat & (SIRFSOC_SPI_FRM_END
+ | SIRFSOC_SPI_RXFIFO_THD_REACH))
while (!((readl(sspi->base + SIRFSOC_SPI_RXFIFO_STATUS)
& SIRFSOC_SPI_FIFO_EMPTY)) &&
sspi->left_rx_cnt)
sspi->rx_word(sspi);
- /* Received all words */
- if ((sspi->left_rx_cnt == 0) && (sspi->left_tx_cnt == 0)) {
- complete(&sspi->done);
- writel(0x0, sspi->base + SIRFSOC_SPI_INT_EN);
- }
- }
-
- if (spi_stat & SIRFSOC_SPI_RXFIFO_THD_REACH ||
- spi_stat & SIRFSOC_SPI_TXFIFO_THD_REACH ||
- spi_stat & SIRFSOC_SPI_RX_FIFO_FULL ||
- spi_stat & SIRFSOC_SPI_TXFIFO_EMPTY)
- tasklet_schedule(&sspi->tasklet_tx);
+ if (spi_stat & (SIRFSOC_SPI_FIFO_EMPTY
+ | SIRFSOC_SPI_TXFIFO_THD_REACH))
+ while (!((readl(sspi->base + SIRFSOC_SPI_TXFIFO_STATUS)
+ & SIRFSOC_SPI_FIFO_FULL)) &&
+ sspi->left_tx_cnt)
+ sspi->tx_word(sspi);
+ /* Received all words */
+ if ((sspi->left_rx_cnt == 0) && (sspi->left_tx_cnt == 0)) {
+ complete(&sspi->done);
+ writel(0x0, sspi->base + SIRFSOC_SPI_INT_EN);
+ }
return IRQ_HANDLED;
}
@@ -426,9 +410,7 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
SIRFSOC_SPI_FIFO_WIDTH_DWORD;
break;
default:
- dev_err(&spi->dev, "Bits per word %d not supported\n",
- bits_per_word);
- return -EINVAL;
+ BUG();
}
if (!(spi->mode & SPI_CS_HIGH))
@@ -556,26 +538,20 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
sspi->bitbang.txrx_bufs = spi_sirfsoc_transfer;
sspi->bitbang.master->setup = spi_sirfsoc_setup;
master->bus_num = pdev->id;
+ master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(12) |
+ SPI_BPW_MASK(16) | SPI_BPW_MASK(32);
sspi->bitbang.master->dev.of_node = pdev->dev.of_node;
- sspi->p = pinctrl_get_select_default(&pdev->dev);
- ret = IS_ERR(sspi->p);
- if (ret)
- goto free_master;
-
sspi->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(sspi->clk)) {
ret = -EINVAL;
- goto free_pin;
+ goto free_master;
}
clk_prepare_enable(sspi->clk);
sspi->ctrl_freq = clk_get_rate(sspi->clk);
init_completion(&sspi->done);
- tasklet_init(&sspi->tasklet_tx, spi_sirfsoc_tasklet_tx,
- (unsigned long)sspi);
-
writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
writel(SIRFSOC_SPI_FIFO_START, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
@@ -594,8 +570,6 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
free_clk:
clk_disable_unprepare(sspi->clk);
clk_put(sspi->clk);
-free_pin:
- pinctrl_put(sspi->p);
free_master:
spi_master_put(master);
err_cs:
@@ -618,7 +592,6 @@ static int spi_sirfsoc_remove(struct platform_device *pdev)
}
clk_disable_unprepare(sspi->clk);
clk_put(sspi->clk);
- pinctrl_put(sspi->p);
spi_master_put(master);
return 0;
}
diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index 598eb45e8008..e8f542ab8935 100644
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -1041,7 +1041,7 @@ static int tegra_spi_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "master allocation failed\n");
return -ENOMEM;
}
- dev_set_drvdata(&pdev->dev, master);
+ platform_set_drvdata(pdev, master);
tspi = spi_master_get_devdata(master);
/* Parse DT */
@@ -1152,7 +1152,7 @@ exit_free_master:
static int tegra_spi_remove(struct platform_device *pdev)
{
- struct spi_master *master = dev_get_drvdata(&pdev->dev);
+ struct spi_master *master = platform_get_drvdata(pdev);
struct tegra_spi_data *tspi = spi_master_get_devdata(master);
free_irq(tspi->irq, tspi);
diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c
index 09df8e22dba0..c1d5d95e70ea 100644
--- a/drivers/spi/spi-tegra20-sflash.c
+++ b/drivers/spi/spi-tegra20-sflash.c
@@ -480,7 +480,7 @@ static int tegra_sflash_probe(struct platform_device *pdev)
master->num_chipselect = MAX_CHIP_SELECT;
master->bus_num = -1;
- dev_set_drvdata(&pdev->dev, master);
+ platform_set_drvdata(pdev, master);
tsd = spi_master_get_devdata(master);
tsd->master = master;
tsd->dev = &pdev->dev;
@@ -555,7 +555,7 @@ exit_free_master:
static int tegra_sflash_remove(struct platform_device *pdev)
{
- struct spi_master *master = dev_get_drvdata(&pdev->dev);
+ struct spi_master *master = platform_get_drvdata(pdev);
struct tegra_sflash_data *tsd = spi_master_get_devdata(master);
free_irq(tsd->irq, tsd);
diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 3faf88d003de..80490cc11ce5 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -1089,7 +1089,7 @@ static int tegra_slink_probe(struct platform_device *pdev)
master->num_chipselect = MAX_CHIP_SELECT;
master->bus_num = -1;
- dev_set_drvdata(&pdev->dev, master);
+ platform_set_drvdata(pdev, master);
tspi = spi_master_get_devdata(master);
tspi->master = master;
tspi->dev = &pdev->dev;
@@ -1193,7 +1193,7 @@ exit_free_master:
static int tegra_slink_remove(struct platform_device *pdev)
{
- struct spi_master *master = dev_get_drvdata(&pdev->dev);
+ struct spi_master *master = platform_get_drvdata(pdev);
struct tegra_slink_data *tspi = spi_master_get_devdata(master);
free_irq(tspi->irq, tspi);
diff --git a/drivers/spi/spi-ti-ssp.c b/drivers/spi/spi-ti-ssp.c
index 46992cab65f1..10606fcc6efc 100644
--- a/drivers/spi/spi-ti-ssp.c
+++ b/drivers/spi/spi-ti-ssp.c
@@ -237,14 +237,6 @@ static void ti_ssp_spi_work(struct work_struct *work)
spin_unlock(&hw->lock);
}
-static int ti_ssp_spi_setup(struct spi_device *spi)
-{
- if (spi->bits_per_word > 32)
- return -EINVAL;
-
- return 0;
-}
-
static int ti_ssp_spi_transfer(struct spi_device *spi, struct spi_message *m)
{
struct ti_ssp_spi *hw;
@@ -269,12 +261,6 @@ static int ti_ssp_spi_transfer(struct spi_device *spi, struct spi_message *m)
dev_err(&spi->dev, "invalid xfer, full duplex\n");
return -EINVAL;
}
-
- if (t->bits_per_word > 32) {
- dev_err(&spi->dev, "invalid xfer width %d\n",
- t->bits_per_word);
- return -EINVAL;
- }
}
spin_lock(&hw->lock);
@@ -337,8 +323,8 @@ static int ti_ssp_spi_probe(struct platform_device *pdev)
master->bus_num = pdev->id;
master->num_chipselect = pdata->num_cs;
master->mode_bits = MODE_BITS;
+ master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32);
master->flags = SPI_MASTER_HALF_DUPLEX;
- master->setup = ti_ssp_spi_setup;
master->transfer = ti_ssp_spi_transfer;
error = spi_register_master(master);
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 637d728fbeb5..dd55707a6aa5 100644
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -367,7 +367,7 @@ static irqreturn_t pch_spi_handler(int irq, void *dev_id)
if (reg_spsr_val & SPSR_ORF_BIT) {
dev_err(&board_dat->pdev->dev, "%s Over run error\n", __func__);
- if (data->current_msg->complete != 0) {
+ if (data->current_msg->complete) {
data->transfer_complete = true;
data->current_msg->status = -EIO;
data->current_msg->complete(data->current_msg->context);
@@ -472,11 +472,6 @@ static int pch_spi_setup(struct spi_device *pspi)
dev_dbg(&pspi->dev, "%s 8 bits per word\n", __func__);
}
- if ((pspi->bits_per_word != 8) && (pspi->bits_per_word != 16)) {
- dev_err(&pspi->dev, "%s Invalid bits per word\n", __func__);
- return -EINVAL;
- }
-
/* Check baud rate setting */
/* if baud rate of chip is greater than
max we can support,return error */
@@ -537,17 +532,6 @@ static int pch_spi_transfer(struct spi_device *pspi, struct spi_message *pmsg)
/* if baud rate has been specified validate the same */
if (transfer->speed_hz > PCH_MAX_BAUDRATE)
transfer->speed_hz = PCH_MAX_BAUDRATE;
-
- /* if bits per word has been specified validate the same */
- if (transfer->bits_per_word) {
- if ((transfer->bits_per_word != 8)
- && (transfer->bits_per_word != 16)) {
- retval = -EINVAL;
- dev_err(&pspi->dev,
- "%s Invalid bits per word\n", __func__);
- goto err_return_spinlock;
- }
- }
}
spin_unlock_irqrestore(&data->lock, flags);
@@ -659,7 +643,7 @@ static void pch_spi_set_tx(struct pch_spi_data *data, int *bpw)
list_for_each_entry_safe(pmsg, tmp, data->queue.next, queue) {
pmsg->status = -ENOMEM;
- if (pmsg->complete != 0)
+ if (pmsg->complete)
pmsg->complete(pmsg->context);
/* delete from queue */
@@ -709,7 +693,7 @@ static void pch_spi_nomore_transfer(struct pch_spi_data *data)
* [To the spi core..indicating end of transfer] */
data->current_msg->status = 0;
- if (data->current_msg->complete != 0) {
+ if (data->current_msg->complete) {
dev_dbg(&data->master->dev,
"%s:Invoking callback of SPI core\n", __func__);
data->current_msg->complete(data->current_msg->context);
@@ -1202,7 +1186,7 @@ static void pch_spi_process_messages(struct work_struct *pwork)
list_for_each_entry_safe(pmsg, tmp, data->queue.next, queue) {
pmsg->status = -EIO;
- if (pmsg->complete != 0) {
+ if (pmsg->complete) {
spin_unlock(&data->lock);
pmsg->complete(pmsg->context);
spin_lock(&data->lock);
@@ -1442,6 +1426,7 @@ static int pch_spi_pd_probe(struct platform_device *plat_dev)
master->setup = pch_spi_setup;
master->transfer = pch_spi_transfer;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
+ master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
data->board_dat = board_dat;
data->plat_dev = plat_dev;
diff --git a/drivers/spi/spi-txx9.c b/drivers/spi/spi-txx9.c
index adb853047926..e9b7681ff6ac 100644
--- a/drivers/spi/spi-txx9.c
+++ b/drivers/spi/spi-txx9.c
@@ -116,17 +116,12 @@ static void txx9spi_cs_func(struct spi_device *spi, struct txx9spi *c,
static int txx9spi_setup(struct spi_device *spi)
{
struct txx9spi *c = spi_master_get_devdata(spi->master);
- u8 bits_per_word;
if (!spi->max_speed_hz
|| spi->max_speed_hz > c->max_speed_hz
|| spi->max_speed_hz < c->min_speed_hz)
return -EINVAL;
- bits_per_word = spi->bits_per_word;
- if (bits_per_word != 8 && bits_per_word != 16)
- return -EINVAL;
-
if (gpio_direction_output(spi->chip_select,
!(spi->mode & SPI_CS_HIGH))) {
dev_err(&spi->dev, "Cannot setup GPIO for chipselect.\n");
@@ -319,8 +314,6 @@ static int txx9spi_transfer(struct spi_device *spi, struct spi_message *m)
if (!t->tx_buf && !t->rx_buf && t->len)
return -EINVAL;
- if (bits_per_word != 8 && bits_per_word != 16)
- return -EINVAL;
if (t->len & ((bits_per_word >> 3) - 1))
return -EINVAL;
if (speed_hz < c->min_speed_hz || speed_hz > c->max_speed_hz)
@@ -411,6 +404,7 @@ static int txx9spi_probe(struct platform_device *dev)
master->setup = txx9spi_setup;
master->transfer = txx9spi_transfer;
master->num_chipselect = (u16)UINT_MAX; /* any GPIO numbers */
+ master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
ret = spi_register_master(master);
if (ret)
@@ -425,7 +419,6 @@ exit:
clk_disable(c->clk);
clk_put(c->clk);
}
- platform_set_drvdata(dev, NULL);
spi_master_put(master);
return ret;
}
@@ -436,7 +429,6 @@ static int txx9spi_remove(struct platform_device *dev)
struct txx9spi *c = spi_master_get_devdata(master);
spi_unregister_master(master);
- platform_set_drvdata(dev, NULL);
destroy_workqueue(c->workqueue);
clk_disable(c->clk);
clk_put(c->clk);
diff --git a/drivers/spi/spi-xcomm.c b/drivers/spi/spi-xcomm.c
index 4d3ec8b9f479..4258c712ad3c 100644
--- a/drivers/spi/spi-xcomm.c
+++ b/drivers/spi/spi-xcomm.c
@@ -76,7 +76,7 @@ static int spi_xcomm_setup_transfer(struct spi_xcomm *spi_xcomm,
{
unsigned int speed;
- if ((t->bits_per_word && t->bits_per_word != 8) || t->len > 62)
+ if (t->len > 62)
return -EINVAL;
speed = t->speed_hz ? t->speed_hz : spi->max_speed_hz;
@@ -209,14 +209,6 @@ static int spi_xcomm_transfer_one(struct spi_master *master,
return status;
}
-static int spi_xcomm_setup(struct spi_device *spi)
-{
- if (spi->bits_per_word != 8)
- return -EINVAL;
-
- return 0;
-}
-
static int spi_xcomm_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@@ -233,8 +225,8 @@ static int spi_xcomm_probe(struct i2c_client *i2c,
master->num_chipselect = 16;
master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_3WIRE;
+ master->bits_per_word_mask = SPI_BPW_MASK(8);
master->flags = SPI_MASTER_HALF_DUPLEX;
- master->setup = spi_xcomm_setup;
master->transfer_one_message = spi_xcomm_transfer_one;
master->dev.of_node = i2c->dev.of_node;
i2c_set_clientdata(i2c, master);
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index 34d18dcfa0db..fb56fcfdf65e 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -30,6 +30,7 @@
*/
#define XSPI_CR_OFFSET 0x60 /* Control Register */
+#define XSPI_CR_LOOP 0x01
#define XSPI_CR_ENABLE 0x02
#define XSPI_CR_MASTER_MODE 0x04
#define XSPI_CR_CPOL 0x08
@@ -232,21 +233,6 @@ static int xilinx_spi_setup_transfer(struct spi_device *spi,
return 0;
}
-static int xilinx_spi_setup(struct spi_device *spi)
-{
- /* always return 0, we can not check the number of bits.
- * There are cases when SPI setup is called before any driver is
- * there, in that case the SPI core defaults to 8 bits, which we
- * do not support in some cases. But if we return an error, the
- * SPI device would not be registered and no driver can get hold of it
- * When the driver is there, it will call SPI setup again with the
- * correct number of bits per transfer.
- * If a driver setups with the wrong bit number, it will fail when
- * it tries to do a transfer
- */
- return 0;
-}
-
static void xilinx_spi_fill_tx_fifo(struct xilinx_spi *xspi)
{
u8 sr;
@@ -315,7 +301,7 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
}
/* See if there is more data to send */
- if (!xspi->remaining_bytes > 0)
+ if (xspi->remaining_bytes <= 0)
break;
}
@@ -355,11 +341,12 @@ static const struct of_device_id xilinx_spi_of_match[] = {
MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
- u32 irq, s16 bus_num, int num_cs, int little_endian, int bits_per_word)
+ u32 irq, s16 bus_num, int num_cs, int bits_per_word)
{
struct spi_master *master;
struct xilinx_spi *xspi;
int ret;
+ u32 tmp;
master = spi_alloc_master(dev, sizeof(struct xilinx_spi));
if (!master)
@@ -373,7 +360,6 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
xspi->bitbang.chipselect = xilinx_spi_chipselect;
xspi->bitbang.setup_transfer = xilinx_spi_setup_transfer;
xspi->bitbang.txrx_bufs = xilinx_spi_txrx_bufs;
- xspi->bitbang.master->setup = xilinx_spi_setup;
init_completion(&xspi->done);
if (!request_mem_region(mem->start, resource_size(mem),
@@ -392,13 +378,25 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
xspi->mem = *mem;
xspi->irq = irq;
- if (little_endian) {
- xspi->read_fn = xspi_read32;
- xspi->write_fn = xspi_write32;
- } else {
+
+ /*
+ * Detect endianess on the IP via loop bit in CR. Detection
+ * must be done before reset is sent because incorrect reset
+ * value generates error interrupt.
+ * Setup little endian helper functions first and try to use them
+ * and check if bit was correctly setup or not.
+ */
+ xspi->read_fn = xspi_read32;
+ xspi->write_fn = xspi_write32;
+
+ xspi->write_fn(XSPI_CR_LOOP, xspi->regs + XSPI_CR_OFFSET);
+ tmp = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET);
+ tmp &= XSPI_CR_LOOP;
+ if (tmp != XSPI_CR_LOOP) {
xspi->read_fn = xspi_read32_be;
xspi->write_fn = xspi_write32_be;
}
+
xspi->bits_per_word = bits_per_word;
if (xspi->bits_per_word == 8) {
xspi->tx_fn = xspi_tx8;
@@ -462,14 +460,13 @@ static int xilinx_spi_probe(struct platform_device *dev)
{
struct xspi_platform_data *pdata;
struct resource *r;
- int irq, num_cs = 0, little_endian = 0, bits_per_word = 8;
+ int irq, num_cs = 0, bits_per_word = 8;
struct spi_master *master;
u8 i;
pdata = dev->dev.platform_data;
if (pdata) {
num_cs = pdata->num_chipselect;
- little_endian = pdata->little_endian;
bits_per_word = pdata->bits_per_word;
}
@@ -501,7 +498,7 @@ static int xilinx_spi_probe(struct platform_device *dev)
return -ENXIO;
master = xilinx_spi_init(&dev->dev, r, irq, dev->id, num_cs,
- little_endian, bits_per_word);
+ bits_per_word);
if (!master)
return -ENODEV;
@@ -517,7 +514,6 @@ static int xilinx_spi_probe(struct platform_device *dev)
static int xilinx_spi_remove(struct platform_device *dev)
{
xilinx_spi_deinit(platform_get_drvdata(dev));
- platform_set_drvdata(dev, 0);
return 0;
}