diff options
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/atmel_spi.c | 4 | ||||
-rw-r--r-- | drivers/spi/au1550_spi.c | 6 | ||||
-rw-r--r-- | drivers/spi/mpc52xx_psc_spi.c | 22 | ||||
-rw-r--r-- | drivers/spi/omap2_mcspi.c | 4 | ||||
-rw-r--r-- | drivers/spi/pxa2xx_spi.c | 4 | ||||
-rw-r--r-- | drivers/spi/spi.c | 139 | ||||
-rw-r--r-- | drivers/spi/spi_imx.c | 6 | ||||
-rw-r--r-- | drivers/spi/spi_s3c24xx.c | 1 |
8 files changed, 115 insertions, 71 deletions
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c index e81d59d7891..0c716566085 100644 --- a/drivers/spi/atmel_spi.c +++ b/drivers/spi/atmel_spi.c @@ -313,14 +313,14 @@ atmel_spi_dma_map_xfer(struct atmel_spi *as, struct spi_transfer *xfer) xfer->tx_dma = dma_map_single(dev, (void *) xfer->tx_buf, xfer->len, DMA_TO_DEVICE); - if (dma_mapping_error(xfer->tx_dma)) + if (dma_mapping_error(dev, xfer->tx_dma)) return -ENOMEM; } if (xfer->rx_buf) { xfer->rx_dma = dma_map_single(dev, xfer->rx_buf, xfer->len, DMA_FROM_DEVICE); - if (dma_mapping_error(xfer->rx_dma)) { + if (dma_mapping_error(dev, xfer->rx_dma)) { if (xfer->tx_buf) dma_unmap_single(dev, xfer->tx_dma, xfer->len, diff --git a/drivers/spi/au1550_spi.c b/drivers/spi/au1550_spi.c index 9149689c79d..87b73e0169c 100644 --- a/drivers/spi/au1550_spi.c +++ b/drivers/spi/au1550_spi.c @@ -334,7 +334,7 @@ static int au1550_spi_dma_rxtmp_alloc(struct au1550_spi *hw, unsigned size) hw->dma_rx_tmpbuf_size = size; hw->dma_rx_tmpbuf_addr = dma_map_single(hw->dev, hw->dma_rx_tmpbuf, size, DMA_FROM_DEVICE); - if (dma_mapping_error(hw->dma_rx_tmpbuf_addr)) { + if (dma_mapping_error(hw->dev, hw->dma_rx_tmpbuf_addr)) { kfree(hw->dma_rx_tmpbuf); hw->dma_rx_tmpbuf = 0; hw->dma_rx_tmpbuf_size = 0; @@ -378,7 +378,7 @@ static int au1550_spi_dma_txrxb(struct spi_device *spi, struct spi_transfer *t) dma_rx_addr = dma_map_single(hw->dev, (void *)t->rx_buf, t->len, DMA_FROM_DEVICE); - if (dma_mapping_error(dma_rx_addr)) + if (dma_mapping_error(hw->dev, dma_rx_addr)) dev_err(hw->dev, "rx dma map error\n"); } } else { @@ -401,7 +401,7 @@ static int au1550_spi_dma_txrxb(struct spi_device *spi, struct spi_transfer *t) dma_tx_addr = dma_map_single(hw->dev, (void *)t->tx_buf, t->len, DMA_TO_DEVICE); - if (dma_mapping_error(dma_tx_addr)) + if (dma_mapping_error(hw->dev, dma_tx_addr)) dev_err(hw->dev, "tx dma map error\n"); } } else { diff --git a/drivers/spi/mpc52xx_psc_spi.c b/drivers/spi/mpc52xx_psc_spi.c index 604e5f0a2d9..25eda71f4bf 100644 --- a/drivers/spi/mpc52xx_psc_spi.c +++ b/drivers/spi/mpc52xx_psc_spi.c @@ -148,7 +148,6 @@ static int mpc52xx_psc_spi_transfer_rxtx(struct spi_device *spi, unsigned rfalarm; unsigned send_at_once = MPC52xx_PSC_BUFSIZE; unsigned recv_at_once; - unsigned bpw = mps->bits_per_word / 8; if (!t->tx_buf && !t->rx_buf && t->len) return -EINVAL; @@ -164,22 +163,15 @@ static int mpc52xx_psc_spi_transfer_rxtx(struct spi_device *spi, } dev_dbg(&spi->dev, "send %d bytes...\n", send_at_once); - if (tx_buf) { - for (; send_at_once; sb++, send_at_once--) { - /* set EOF flag */ - if (mps->bits_per_word - && (sb + 1) % bpw == 0) - out_8(&psc->ircr2, 0x01); + for (; send_at_once; sb++, send_at_once--) { + /* set EOF flag before the last word is sent */ + if (send_at_once == 1) + out_8(&psc->ircr2, 0x01); + + if (tx_buf) out_8(&psc->mpc52xx_psc_buffer_8, tx_buf[sb]); - } - } else { - for (; send_at_once; sb++, send_at_once--) { - /* set EOF flag */ - if (mps->bits_per_word - && ((sb + 1) % bpw) == 0) - out_8(&psc->ircr2, 0x01); + else out_8(&psc->mpc52xx_psc_buffer_8, 0); - } } diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c index b1cc148036c..f6f987bb71c 100644 --- a/drivers/spi/omap2_mcspi.c +++ b/drivers/spi/omap2_mcspi.c @@ -836,7 +836,7 @@ static int omap2_mcspi_transfer(struct spi_device *spi, struct spi_message *m) if (tx_buf != NULL) { t->tx_dma = dma_map_single(&spi->dev, (void *) tx_buf, len, DMA_TO_DEVICE); - if (dma_mapping_error(t->tx_dma)) { + if (dma_mapping_error(&spi->dev, t->tx_dma)) { dev_dbg(&spi->dev, "dma %cX %d bytes error\n", 'T', len); return -EINVAL; @@ -845,7 +845,7 @@ static int omap2_mcspi_transfer(struct spi_device *spi, struct spi_message *m) if (rx_buf != NULL) { t->rx_dma = dma_map_single(&spi->dev, rx_buf, t->len, DMA_FROM_DEVICE); - if (dma_mapping_error(t->rx_dma)) { + if (dma_mapping_error(&spi->dev, t->rx_dma)) { dev_dbg(&spi->dev, "dma %cX %d bytes error\n", 'R', len); if (tx_buf != NULL) diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c index 0c452c46ab0..067299d6d19 100644 --- a/drivers/spi/pxa2xx_spi.c +++ b/drivers/spi/pxa2xx_spi.c @@ -353,7 +353,7 @@ static int map_dma_buffers(struct driver_data *drv_data) drv_data->rx_dma = dma_map_single(dev, drv_data->rx, drv_data->rx_map_len, DMA_FROM_DEVICE); - if (dma_mapping_error(drv_data->rx_dma)) + if (dma_mapping_error(dev, drv_data->rx_dma)) return 0; /* Stream map the tx buffer */ @@ -361,7 +361,7 @@ static int map_dma_buffers(struct driver_data *drv_data) drv_data->tx_map_len, DMA_TO_DEVICE); - if (dma_mapping_error(drv_data->tx_dma)) { + if (dma_mapping_error(dev, drv_data->tx_dma)) { dma_unmap_single(dev, drv_data->rx_dma, drv_data->rx_map_len, DMA_FROM_DEVICE); return 0; diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index ecca4a6a6f9..964124b60db 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -178,6 +178,96 @@ struct boardinfo { static LIST_HEAD(board_list); static DEFINE_MUTEX(board_lock); +/** + * spi_alloc_device - Allocate a new SPI device + * @master: Controller to which device is connected + * Context: can sleep + * + * Allows a driver to allocate and initialize a spi_device without + * registering it immediately. This allows a driver to directly + * fill the spi_device with device parameters before calling + * spi_add_device() on it. + * + * Caller is responsible to call spi_add_device() on the returned + * spi_device structure to add it to the SPI master. If the caller + * needs to discard the spi_device without adding it, then it should + * call spi_dev_put() on it. + * + * Returns a pointer to the new device, or NULL. + */ +struct spi_device *spi_alloc_device(struct spi_master *master) +{ + struct spi_device *spi; + struct device *dev = master->dev.parent; + + if (!spi_master_get(master)) + return NULL; + + spi = kzalloc(sizeof *spi, GFP_KERNEL); + if (!spi) { + dev_err(dev, "cannot alloc spi_device\n"); + spi_master_put(master); + return NULL; + } + + spi->master = master; + spi->dev.parent = dev; + spi->dev.bus = &spi_bus_type; + spi->dev.release = spidev_release; + device_initialize(&spi->dev); + return spi; +} +EXPORT_SYMBOL_GPL(spi_alloc_device); + +/** + * spi_add_device - Add spi_device allocated with spi_alloc_device + * @spi: spi_device to register + * + * Companion function to spi_alloc_device. Devices allocated with + * spi_alloc_device can be added onto the spi bus with this function. + * + * Returns 0 on success; non-zero on failure + */ +int spi_add_device(struct spi_device *spi) +{ + struct device *dev = spi->master->dev.parent; + int status; + + /* Chipselects are numbered 0..max; validate. */ + if (spi->chip_select >= spi->master->num_chipselect) { + dev_err(dev, "cs%d >= max %d\n", + spi->chip_select, + spi->master->num_chipselect); + return -EINVAL; + } + + /* Set the bus ID string */ + snprintf(spi->dev.bus_id, sizeof spi->dev.bus_id, + "%s.%u", spi->master->dev.bus_id, + spi->chip_select); + + /* drivers may modify this initial i/o setup */ + status = spi->master->setup(spi); + if (status < 0) { + dev_err(dev, "can't %s %s, status %d\n", + "setup", spi->dev.bus_id, status); + return status; + } + + /* driver core catches callers that misbehave by defining + * devices that already exist. + */ + status = device_add(&spi->dev); + if (status < 0) { + dev_err(dev, "can't %s %s, status %d\n", + "add", spi->dev.bus_id, status); + return status; + } + + dev_dbg(dev, "registered child %s\n", spi->dev.bus_id); + return 0; +} +EXPORT_SYMBOL_GPL(spi_add_device); /** * spi_new_device - instantiate one new SPI device @@ -197,7 +287,6 @@ struct spi_device *spi_new_device(struct spi_master *master, struct spi_board_info *chip) { struct spi_device *proxy; - struct device *dev = master->dev.parent; int status; /* NOTE: caller did any chip->bus_num checks necessary. @@ -207,66 +296,28 @@ struct spi_device *spi_new_device(struct spi_master *master, * suggests syslogged diagnostics are best here (ugh). */ - /* Chipselects are numbered 0..max; validate. */ - if (chip->chip_select >= master->num_chipselect) { - dev_err(dev, "cs%d > max %d\n", - chip->chip_select, - master->num_chipselect); - return NULL; - } - - if (!spi_master_get(master)) + proxy = spi_alloc_device(master); + if (!proxy) return NULL; WARN_ON(strlen(chip->modalias) >= sizeof(proxy->modalias)); - proxy = kzalloc(sizeof *proxy, GFP_KERNEL); - if (!proxy) { - dev_err(dev, "can't alloc dev for cs%d\n", - chip->chip_select); - goto fail; - } - proxy->master = master; proxy->chip_select = chip->chip_select; proxy->max_speed_hz = chip->max_speed_hz; proxy->mode = chip->mode; proxy->irq = chip->irq; strlcpy(proxy->modalias, chip->modalias, sizeof(proxy->modalias)); - - snprintf(proxy->dev.bus_id, sizeof proxy->dev.bus_id, - "%s.%u", master->dev.bus_id, - chip->chip_select); - proxy->dev.parent = dev; - proxy->dev.bus = &spi_bus_type; proxy->dev.platform_data = (void *) chip->platform_data; proxy->controller_data = chip->controller_data; proxy->controller_state = NULL; - proxy->dev.release = spidev_release; - /* drivers may modify this initial i/o setup */ - status = master->setup(proxy); + status = spi_add_device(proxy); if (status < 0) { - dev_err(dev, "can't %s %s, status %d\n", - "setup", proxy->dev.bus_id, status); - goto fail; + spi_dev_put(proxy); + return NULL; } - /* driver core catches callers that misbehave by defining - * devices that already exist. - */ - status = device_register(&proxy->dev); - if (status < 0) { - dev_err(dev, "can't %s %s, status %d\n", - "add", proxy->dev.bus_id, status); - goto fail; - } - dev_dbg(dev, "registered child %s\n", proxy->dev.bus_id); return proxy; - -fail: - spi_master_put(master); - kfree(proxy); - return NULL; } EXPORT_SYMBOL_GPL(spi_new_device); diff --git a/drivers/spi/spi_imx.c b/drivers/spi/spi_imx.c index 54ac7bea5f8..6fb77fcc497 100644 --- a/drivers/spi/spi_imx.c +++ b/drivers/spi/spi_imx.c @@ -491,7 +491,7 @@ static int map_dma_buffers(struct driver_data *drv_data) buf, drv_data->tx_map_len, DMA_TO_DEVICE); - if (dma_mapping_error(drv_data->tx_dma)) + if (dma_mapping_error(dev, drv_data->tx_dma)) return -1; drv_data->tx_dma_needs_unmap = 1; @@ -516,7 +516,7 @@ static int map_dma_buffers(struct driver_data *drv_data) buf, drv_data->len, DMA_FROM_DEVICE); - if (dma_mapping_error(drv_data->rx_dma)) + if (dma_mapping_error(dev, drv_data->rx_dma)) return -1; drv_data->rx_dma_needs_unmap = 1; } @@ -534,7 +534,7 @@ static int map_dma_buffers(struct driver_data *drv_data) buf, drv_data->tx_map_len, DMA_TO_DEVICE); - if (dma_mapping_error(drv_data->tx_dma)) { + if (dma_mapping_error(dev, drv_data->tx_dma)) { if (drv_data->rx_dma) { dma_unmap_single(dev, drv_data->rx_dma, diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c index 0885cc357a3..1c643c9e1f1 100644 --- a/drivers/spi/spi_s3c24xx.c +++ b/drivers/spi/spi_s3c24xx.c @@ -270,6 +270,7 @@ static int __init s3c24xx_spi_probe(struct platform_device *pdev) /* setup the master state. */ master->num_chipselect = hw->pdata->num_cs; + master->bus_num = pdata->bus_num; /* setup the state for the bitbang driver */ |