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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-01-11 15:10:08 +1100 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-01-11 15:10:08 +1100 |
commit | eed0ba0b4ab2d1668588219a8efa81bf8636a12d (patch) | |
tree | f5aa3c732e7830a1b24e6071f8bed0f799881187 /drivers/spi | |
parent | 98b14d6b290d96b24ae993ceaccc59b2aa4b130c (diff) | |
parent | c9de9333f5a860cab82052bce6ac28bcac9b2c26 (diff) | |
download | kernel_samsung_smdk4412-eed0ba0b4ab2d1668588219a8efa81bf8636a12d.zip kernel_samsung_smdk4412-eed0ba0b4ab2d1668588219a8efa81bf8636a12d.tar.gz kernel_samsung_smdk4412-eed0ba0b4ab2d1668588219a8efa81bf8636a12d.tar.bz2 |
Merge remote branch 'gcl/next' into next
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/atmel_spi.c | 6 | ||||
-rw-r--r-- | drivers/spi/dw_spi.c | 5 | ||||
-rw-r--r-- | drivers/spi/mpc52xx_spi.c | 2 | ||||
-rw-r--r-- | drivers/spi/spi.c | 3 | ||||
-rw-r--r-- | drivers/spi/spi_fsl_espi.c | 35 |
5 files changed, 37 insertions, 14 deletions
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c index 154529a..a067046 100644 --- a/drivers/spi/atmel_spi.c +++ b/drivers/spi/atmel_spi.c @@ -352,8 +352,12 @@ atmel_spi_dma_map_xfer(struct atmel_spi *as, struct spi_transfer *xfer) xfer->tx_dma = xfer->rx_dma = INVALID_DMA_ADDRESS; if (xfer->tx_buf) { + /* tx_buf is a const void* where we need a void * for the dma + * mapping */ + void *nonconst_tx = (void *)xfer->tx_buf; + xfer->tx_dma = dma_map_single(dev, - (void *) xfer->tx_buf, xfer->len, + nonconst_tx, xfer->len, DMA_TO_DEVICE); if (dma_mapping_error(dev, xfer->tx_dma)) return -ENOMEM; diff --git a/drivers/spi/dw_spi.c b/drivers/spi/dw_spi.c index 9043931..0838c79 100644 --- a/drivers/spi/dw_spi.c +++ b/drivers/spi/dw_spi.c @@ -413,6 +413,11 @@ static void poll_transfer(struct dw_spi *dws) { while (dws->write(dws)) dws->read(dws); + /* + * There is a possibility that the last word of a transaction + * will be lost if data is not ready. Re-read to solve this issue. + */ + dws->read(dws); transfer_complete(dws); } diff --git a/drivers/spi/mpc52xx_spi.c b/drivers/spi/mpc52xx_spi.c index ec9f0b1..84439f6 100644 --- a/drivers/spi/mpc52xx_spi.c +++ b/drivers/spi/mpc52xx_spi.c @@ -563,7 +563,7 @@ static struct of_platform_driver mpc52xx_spi_of_driver = { .of_match_table = mpc52xx_spi_match, }, .probe = mpc52xx_spi_probe, - .remove = __exit_p(mpc52xx_spi_remove), + .remove = __devexit_p(mpc52xx_spi_remove), }; static int __init mpc52xx_spi_init(void) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 709c836..b02d0cb 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -584,8 +584,7 @@ void spi_unregister_master(struct spi_master *master) list_del(&master->list); mutex_unlock(&board_lock); - dummy = device_for_each_child(master->dev.parent, &master->dev, - __unregister); + dummy = device_for_each_child(&master->dev, NULL, __unregister); device_unregister(&master->dev); } EXPORT_SYMBOL_GPL(spi_unregister_master); diff --git a/drivers/spi/spi_fsl_espi.c b/drivers/spi/spi_fsl_espi.c index e3b4f64..a99e233 100644 --- a/drivers/spi/spi_fsl_espi.c +++ b/drivers/spi/spi_fsl_espi.c @@ -258,18 +258,18 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t) return mpc8xxx_spi->count; } -static void fsl_espi_addr2cmd(unsigned int addr, u8 *cmd) +static inline void fsl_espi_addr2cmd(unsigned int addr, u8 *cmd) { - if (cmd[1] && cmd[2] && cmd[3]) { + if (cmd) { cmd[1] = (u8)(addr >> 16); cmd[2] = (u8)(addr >> 8); cmd[3] = (u8)(addr >> 0); } } -static unsigned int fsl_espi_cmd2addr(u8 *cmd) +static inline unsigned int fsl_espi_cmd2addr(u8 *cmd) { - if (cmd[1] && cmd[2] && cmd[3]) + if (cmd) return cmd[1] << 16 | cmd[2] << 8 | cmd[3] << 0; return 0; @@ -395,9 +395,11 @@ static void fsl_espi_rw_trans(struct spi_message *m, } } - addr = fsl_espi_cmd2addr(local_buf); - addr += pos; - fsl_espi_addr2cmd(addr, local_buf); + if (pos > 0) { + addr = fsl_espi_cmd2addr(local_buf); + addr += pos; + fsl_espi_addr2cmd(addr, local_buf); + } espi_trans->n_tx = n_tx; espi_trans->n_rx = trans_len; @@ -507,16 +509,29 @@ void fsl_espi_cpu_irq(struct mpc8xxx_spi *mspi, u32 events) /* We need handle RX first */ if (events & SPIE_NE) { - u32 rx_data; + u32 rx_data, tmp; + u8 rx_data_8; /* Spin until RX is done */ while (SPIE_RXCNT(events) < min(4, mspi->len)) { cpu_relax(); events = mpc8xxx_spi_read_reg(®_base->event); } - mspi->len -= 4; - rx_data = mpc8xxx_spi_read_reg(®_base->receive); + if (mspi->len >= 4) { + rx_data = mpc8xxx_spi_read_reg(®_base->receive); + } else { + tmp = mspi->len; + rx_data = 0; + while (tmp--) { + rx_data_8 = in_8((u8 *)®_base->receive); + rx_data |= (rx_data_8 << (tmp * 8)); + } + + rx_data <<= (4 - mspi->len) * 8; + } + + mspi->len -= 4; if (mspi->rx) mspi->get_rx(rx_data, mspi); |