diff options
| author | Marek Vasut <marex@denx.de> | 2013-02-23 02:42:59 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2013-03-07 17:22:56 +0100 |
| commit | c96e78ccfe81394d87cbff855f40f5d7cd377811 (patch) | |
| tree | 49a814e78c681729df59ec1f2e1489f985ec98ee /drivers | |
| parent | 3430e0bd2aa5b94fdd5f7627172a5cb540776c9d (diff) | |
| download | blackbird-obmc-uboot-c96e78ccfe81394d87cbff855f40f5d7cd377811.tar.gz blackbird-obmc-uboot-c96e78ccfe81394d87cbff855f40f5d7cd377811.zip | |
mxs: spi: Fix the MXS SPI for mx23
The MX23 has slightly different register layout. Adjust the SPI
driver to match the layout, both the PIO and DMA part.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/mxs_spi.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c index 6acc95a1b4..b5b32dc5cc 100644 --- a/drivers/spi/mxs_spi.c +++ b/drivers/spi/mxs_spi.c @@ -168,7 +168,12 @@ static int mxs_spi_xfer_pio(struct mxs_spi_slave *slave, while (length--) { /* We transfer 1 byte */ +#if defined(CONFIG_MX23) + writel(SSP_CTRL0_XFER_COUNT_MASK, &ssp_regs->hw_ssp_ctrl0_clr); + writel(1, &ssp_regs->hw_ssp_ctrl0_set); +#elif defined(CONFIG_MX28) writel(1, &ssp_regs->hw_ssp_xfer_size); +#endif if ((flags & SPI_XFER_END) && !length) mxs_spi_end_xfer(ssp_regs); @@ -226,6 +231,12 @@ static int mxs_spi_xfer_dma(struct mxs_spi_slave *slave, int tl; int ret = 0; +#if defined(CONFIG_MX23) + const int mxs_spi_pio_words = 1; +#elif defined(CONFIG_MX28) + const int mxs_spi_pio_words = 4; +#endif + ALLOC_CACHE_ALIGN_BUFFER(struct mxs_dma_desc, desc, desc_count); memset(desc, 0, sizeof(struct mxs_dma_desc) * desc_count); @@ -281,7 +292,7 @@ static int mxs_spi_xfer_dma(struct mxs_spi_slave *slave, dp->cmd.data |= ((tl & 0xffff) << MXS_DMA_DESC_BYTES_OFFSET) | - (4 << MXS_DMA_DESC_PIO_WORDS_OFFSET) | + (mxs_spi_pio_words << MXS_DMA_DESC_PIO_WORDS_OFFSET) | MXS_DMA_DESC_HALT_ON_TERMINATE | MXS_DMA_DESC_TERMINATE_FLUSH; @@ -298,15 +309,19 @@ static int mxs_spi_xfer_dma(struct mxs_spi_slave *slave, } /* - * Write CTRL0, CMD0, CMD1, XFER_SIZE registers. It is + * Write CTRL0, CMD0, CMD1 and XFER_SIZE registers in + * case of MX28, write only CTRL0 in case of MX23 due + * to the difference in register layout. It is utterly * essential that the XFER_SIZE register is written on * a per-descriptor basis with the same size as is the * descriptor! */ dp->cmd.pio_words[0] = ctrl0; +#ifdef CONFIG_MX28 dp->cmd.pio_words[1] = 0; dp->cmd.pio_words[2] = 0; dp->cmd.pio_words[3] = tl; +#endif mxs_dma_desc_append(dmach, dp); |
