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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2015-03-09 16:48:49 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-03-09 18:11:13 +0000 |
| commit | f89a6d8f43ebe9508bb5492c846ad997ad50eafe (patch) | |
| tree | 9efc2db1c5c20e114e65638bedf7f0eb880ec595 /drivers/spi/spi-dw.h | |
| parent | 4d5ac1edfdd79aea31983333cb53dd5db29559f9 (diff) | |
| download | linux-f89a6d8f43ebe9508bb5492c846ad997ad50eafe.tar.gz linux-f89a6d8f43ebe9508bb5492c846ad997ad50eafe.tar.bz2 linux-f89a6d8f43ebe9508bb5492c846ad997ad50eafe.zip | |
spi: dw-mid: move to use core SPI DMA mappings
SPI core has a comprehensive function set to map and unmap a message when it's
needed. This patch converts driver to use that advantage.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-dw.h')
| -rw-r--r-- | drivers/spi/spi-dw.h | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 7f130bd8f37a..f298df59381b 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -91,8 +91,10 @@ struct dw_spi; struct dw_spi_dma_ops { int (*dma_init)(struct dw_spi *dws); void (*dma_exit)(struct dw_spi *dws); - int (*dma_setup)(struct dw_spi *dws); - int (*dma_transfer)(struct dw_spi *dws); + int (*dma_setup)(struct dw_spi *dws, struct spi_transfer *xfer); + bool (*can_dma)(struct spi_master *master, struct spi_device *spi, + struct spi_transfer *xfer); + int (*dma_transfer)(struct dw_spi *dws, struct spi_transfer *xfer); void (*dma_stop)(struct dw_spi *dws); }; @@ -117,20 +119,14 @@ struct dw_spi { void *rx; void *rx_end; int dma_mapped; - dma_addr_t rx_dma; - dma_addr_t tx_dma; - size_t rx_map_len; - size_t tx_map_len; u8 n_bytes; /* current is a 1/2 bytes op */ u32 dma_width; irqreturn_t (*transfer_handler)(struct dw_spi *dws); - /* Dma info */ + /* DMA info */ int dma_inited; struct dma_chan *txchan; - struct scatterlist tx_sgl; struct dma_chan *rxchan; - struct scatterlist rx_sgl; unsigned long dma_chan_busy; struct device *dma_dev; dma_addr_t dma_addr; /* phy address of the Data register */ @@ -206,14 +202,13 @@ static inline void spi_reset_chip(struct dw_spi *dws) /* * Each SPI slave device to work with dw_api controller should - * has such a structure claiming its working mode (PIO/DMA etc), + * has such a structure claiming its working mode (poll or PIO/DMA), * which can be save in the "controller_data" member of the * struct spi_device. */ struct dw_spi_chip { u8 poll_mode; /* 1 for controller polling mode */ u8 type; /* SPI/SSP/MicroWire */ - u8 enable_dma; void (*cs_control)(u32 command); }; |