diff options
Diffstat (limited to 'drivers/fsl_i2c.c')
| -rw-r--r-- | drivers/fsl_i2c.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/fsl_i2c.c b/drivers/fsl_i2c.c index f00e802..c929096 100644 --- a/drivers/fsl_i2c.c +++ b/drivers/fsl_i2c.c @@ -29,6 +29,9 @@ #define I2C_TIMEOUT (CFG_HZ / 4) +#define I2C_READ_BIT 1 +#define I2C_WRITE_BIT 0 + /* Initialize the bus pointer to whatever one the SPD EEPROM is on. * Default is bus 0. This is necessary because the DDR initialization * runs from ROM, and we can't switch buses because we can't modify @@ -110,7 +113,7 @@ i2c_wait(int write) return -1; } - if (write == I2C_WRITE && (csr & I2C_SR_RXAK)) { + if (write == I2C_WRITE_BIT && (csr & I2C_SR_RXAK)) { debug("i2c_wait: No RXACK\n"); return -1; } @@ -131,7 +134,7 @@ i2c_write_addr (u8 dev, u8 dir, int rsta) writeb((dev << 1) | dir, &i2c_dev[i2c_bus_num]->dr); - if (i2c_wait(I2C_WRITE) < 0) + if (i2c_wait(I2C_WRITE_BIT) < 0) return 0; return 1; @@ -148,7 +151,7 @@ __i2c_write(u8 *data, int length) for (i = 0; i < length; i++) { writeb(data[i], &i2c_dev[i2c_bus_num]->dr); - if (i2c_wait(I2C_WRITE) < 0) + if (i2c_wait(I2C_WRITE_BIT) < 0) break; } @@ -167,7 +170,7 @@ __i2c_read(u8 *data, int length) readb(&i2c_dev[i2c_bus_num]->dr); for (i = 0; i < length; i++) { - if (i2c_wait(I2C_READ) < 0) + if (i2c_wait(I2C_READ_BIT) < 0) break; /* Generate ack on last next to last byte */ @@ -192,9 +195,9 @@ i2c_read(u8 dev, uint addr, int alen, u8 *data, int length) u8 *a = (u8*)&addr; if (i2c_wait4bus() >= 0 - && i2c_write_addr(dev, I2C_WRITE, 0) != 0 + && i2c_write_addr(dev, I2C_WRITE_BIT, 0) != 0 && __i2c_write(&a[4 - alen], alen) == alen - && i2c_write_addr(dev, I2C_READ, 1) != 0) { + && i2c_write_addr(dev, I2C_READ_BIT, 1) != 0) { i = __i2c_read(data, length); } @@ -213,7 +216,7 @@ i2c_write(u8 dev, uint addr, int alen, u8 *data, int length) u8 *a = (u8*)&addr; if (i2c_wait4bus() >= 0 - && i2c_write_addr(dev, I2C_WRITE, 0) != 0 + && i2c_write_addr(dev, I2C_WRITE_BIT, 0) != 0 && __i2c_write(&a[4 - alen], alen) == alen) { i = __i2c_write(data, length); } |