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| author | Guennadi Liakhovetski <lg@denx.de> | 2008-04-15 14:14:25 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2008-04-18 00:43:23 -0700 |
| commit | 38254f45b0b412332726c90d3184ad47479fcffb (patch) | |
| tree | 927798cfb0fb9f53e461071b63af16ebdc0b5912 /include/spi.h | |
| parent | 248b7d984cffa3107b5acb4c3f5501b7538d877a (diff) | |
| download | u-boot-imx-38254f45b0b412332726c90d3184ad47479fcffb.zip u-boot-imx-38254f45b0b412332726c90d3184ad47479fcffb.tar.gz u-boot-imx-38254f45b0b412332726c90d3184ad47479fcffb.tar.bz2 | |
New i.MX31 SPI driver
This is an SPI driver for i.MX and MXC based SoCs from Freescale. So far
only implemented and tested on i.MX31, can with a modified register layout
and definitions be used for i.MX27, I think, MXC CPUs have similar SPI
controllers too.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Diffstat (limited to 'include/spi.h')
| -rw-r--r-- | include/spi.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/spi.h b/include/spi.h index 03dc5bc..3a55a68 100644 --- a/include/spi.h +++ b/include/spi.h @@ -24,6 +24,18 @@ #ifndef _SPI_H_ #define _SPI_H_ +/* SPI mode flags */ +#define SPI_CPHA 0x01 /* clock phase */ +#define SPI_CPOL 0x02 /* clock polarity */ +#define SPI_MODE_0 (0|0) /* (original MicroWire) */ +#define SPI_MODE_1 (0|SPI_CPHA) +#define SPI_MODE_2 (SPI_CPOL|0) +#define SPI_MODE_3 (SPI_CPOL|SPI_CPHA) +#define SPI_CS_HIGH 0x04 /* chipselect active high? */ +#define SPI_LSB_FIRST 0x08 /* per-word bits-on-wire */ +#define SPI_3WIRE 0x10 /* SI/SO signals shared */ +#define SPI_LOOP 0x20 /* loopback mode */ + /* * The function call pointer type used to drive the chip select. */ @@ -68,6 +80,8 @@ void spi_init(void); * * Returns: 0 on success, not 0 on failure */ -int spi_xfer(spi_chipsel_type chipsel, int bitlen, uchar *dout, uchar *din); +int spi_xfer(spi_chipsel_type chipsel, int bitlen, uchar *dout, uchar *din); + +int spi_select(unsigned int bus, unsigned int dev, unsigned long mode); #endif /* _SPI_H_ */ |