From 9661bf9d120f760238b2a073b84f2baf05010057 Mon Sep 17 00:00:00 2001 From: Heiko Schocher Date: Wed, 15 Oct 2008 09:36:03 +0200 Subject: mgcoge, mgsuvd: add I2C support. Signed-off-by: Heiko Schocher --- include/configs/mgsuvd.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) (limited to 'include/configs/mgsuvd.h') diff --git a/include/configs/mgsuvd.h b/include/configs/mgsuvd.h index 740767e1e2..f2cfe6e274 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 */ -- cgit v1.2.1