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path: root/drivers/fsl_i2c.c
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Diffstat (limited to 'drivers/fsl_i2c.c')
-rw-r--r--drivers/fsl_i2c.c17
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);
}