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| author | Heiko Schocher <hs@denx.de> | 2008-10-15 09:36:03 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2008-10-18 21:54:01 +0200 |
| commit | 9661bf9d120f760238b2a073b84f2baf05010057 (patch) | |
| tree | c6ff961aff45582a645afea25d31b5e9ef5bc84d /include/configs/mgsuvd.h | |
| parent | 98aed379586a155292efbf3209356836584b601c (diff) | |
| download | u-boot-imx-9661bf9d120f760238b2a073b84f2baf05010057.zip u-boot-imx-9661bf9d120f760238b2a073b84f2baf05010057.tar.gz u-boot-imx-9661bf9d120f760238b2a073b84f2baf05010057.tar.bz2 | |
mgcoge, mgsuvd: add I2C support.
Signed-off-by: Heiko Schocher <hs@denx.de>
Diffstat (limited to 'include/configs/mgsuvd.h')
| -rw-r--r-- | include/configs/mgsuvd.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/include/configs/mgsuvd.h b/include/configs/mgsuvd.h index 740767e..f2cfe6e 100644 --- a/include/configs/mgsuvd.h +++ b/include/configs/mgsuvd.h @@ -113,6 +113,7 @@ #define CONFIG_CMD_ASKENV #define CONFIG_CMD_DHCP +#define CONFIG_CMD_I2C #define CONFIG_CMD_NFS #define CONFIG_CMD_PING @@ -330,4 +331,46 @@ #define OF_TBCLK (bd->bi_busfreq / 4) #define OF_STDOUT_PATH "/soc/cpm/serial@a80" +/* enable I2C and select the hardware/software driver */ +#undef CONFIG_HARD_I2C /* I2C with hardware support */ +#define CONFIG_SOFT_I2C 1 /* I2C bit-banged */ +#define CFG_I2C_SPEED 50000 /* I2C speed and slave address */ +#define CFG_I2C_SLAVE 0x7F +#define I2C_SOFT_DECLARATIONS + +/* + * Software (bit-bang) I2C driver configuration + */ +#define I2C_BASE_DIR (CFG_PIGGY_BASE + 0x04) +#define I2C_BASE_PORT (CFG_PIGGY_BASE + 0x09) + +#define SDA_BIT 0x40 +#define SCL_BIT 0x80 +#define SDA_CONF 0x1000 +#define SCL_CONF 0x2000 + +#define I2C_ACTIVE do {} while (0) +#define I2C_TRISTATE do {} while (0) +#define I2C_READ i2c_soft_read_pin () +#define I2C_SDA(bit) if(bit) { \ + *(unsigned short *)(I2C_BASE_DIR) &= ~SDA_CONF; \ + } \ + else { \ + *(unsigned char *)(I2C_BASE_PORT) &= ~SDA_BIT; \ + *(unsigned short *)(I2C_BASE_DIR) |= SDA_CONF; \ + } +#define I2C_SCL(bit) if(bit) { \ + *(unsigned short *)(I2C_BASE_DIR) &= ~SCL_CONF; \ + } \ + else { \ + *(unsigned char *)(I2C_BASE_PORT) &= ~SCL_BIT; \ + *(unsigned short *)(I2C_BASE_DIR) |= SCL_CONF; \ + } +#define I2C_DELAY udelay(50) /* 1/4 I2C clock duration */ + +#define CONFIG_I2C_MULTI_BUS 1 +#define CONFIG_I2C_CMD_TREE 1 +#define CFG_MAX_I2C_BUS 2 + + #endif /* __CONFIG_H */ |