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-rw-r--r--drivers/i2c/designware_i2c.c38
-rw-r--r--drivers/i2c/fti2c010.c4
-rw-r--r--drivers/i2c/i2c_core.c2
-rw-r--r--drivers/i2c/rcar_i2c.c6
4 files changed, 45 insertions, 5 deletions
diff --git a/drivers/i2c/designware_i2c.c b/drivers/i2c/designware_i2c.c
index cb2ac04..9ed9295 100644
--- a/drivers/i2c/designware_i2c.c
+++ b/drivers/i2c/designware_i2c.c
@@ -266,6 +266,25 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
{
unsigned long start_time_rx;
+#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
+ /*
+ * EEPROM chips that implement "address overflow" are ones
+ * like Catalyst 24WC04/08/16 which has 9/10/11 bits of
+ * address and the extra bits end up in the "chip address"
+ * bit slots. This makes a 24WC08 (1Kbyte) chip look like
+ * four 256 byte chips.
+ *
+ * Note that we consider the length of the address field to
+ * still be one byte because the extra address bits are
+ * hidden in the chip address.
+ */
+ chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
+ addr &= ~(CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW << (alen * 8));
+
+ debug("%s: fix addr_overflow: chip %02x addr %02x\n", __func__, chip,
+ addr);
+#endif
+
if (check_params(addr, alen, buffer, len))
return 1;
@@ -307,6 +326,25 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
int nb = len;
unsigned long start_time_tx;
+#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
+ /*
+ * EEPROM chips that implement "address overflow" are ones
+ * like Catalyst 24WC04/08/16 which has 9/10/11 bits of
+ * address and the extra bits end up in the "chip address"
+ * bit slots. This makes a 24WC08 (1Kbyte) chip look like
+ * four 256 byte chips.
+ *
+ * Note that we consider the length of the address field to
+ * still be one byte because the extra address bits are
+ * hidden in the chip address.
+ */
+ chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
+ addr &= ~(CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW << (alen * 8));
+
+ debug("%s: fix addr_overflow: chip %02x addr %02x\n", __func__, chip,
+ addr);
+#endif
+
if (check_params(addr, alen, buffer, len))
return 1;
diff --git a/drivers/i2c/fti2c010.c b/drivers/i2c/fti2c010.c
index fb9fa35..68d9a42 100644
--- a/drivers/i2c/fti2c010.c
+++ b/drivers/i2c/fti2c010.c
@@ -201,7 +201,7 @@ static int fti2c010_read(struct i2c_adapter *adap,
struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
struct fti2c010_regs *regs = chip->regs;
int ret, pos;
- uchar paddr[4];
+ uchar paddr[4] = { 0 };
to_i2c_addr(paddr, addr, alen);
@@ -263,7 +263,7 @@ static int fti2c010_write(struct i2c_adapter *adap,
struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
struct fti2c010_regs *regs = chip->regs;
int ret, pos;
- uchar paddr[4];
+ uchar paddr[4] = { 0 };
to_i2c_addr(paddr, addr, alen);
diff --git a/drivers/i2c/i2c_core.c b/drivers/i2c/i2c_core.c
index e1767f4..18d6736 100644
--- a/drivers/i2c/i2c_core.c
+++ b/drivers/i2c/i2c_core.c
@@ -349,7 +349,7 @@ unsigned int i2c_set_bus_speed(unsigned int speed)
return 0;
ret = I2C_ADAP->set_bus_speed(I2C_ADAP, speed);
if (gd->flags & GD_FLG_RELOC)
- I2C_ADAP->speed = ret;
+ I2C_ADAP->speed = (ret == 0) ? speed : 0;
return ret;
}
diff --git a/drivers/i2c/rcar_i2c.c b/drivers/i2c/rcar_i2c.c
index ba2cadb..50cebd6 100644
--- a/drivers/i2c/rcar_i2c.c
+++ b/drivers/i2c/rcar_i2c.c
@@ -119,11 +119,13 @@ rcar_i2c_raw_read(struct rcar_i2c *dev, u8 chip, uint addr)
/* set slave address, receive */
writel((chip << 1) | 1, &dev->icmar);
+ /* clear status */
+ writel(0, &dev->icmsr);
/* start master receive */
writel(MCR_MDBS | MCR_MIE | MCR_ESG, &dev->icmcr);
- while ((readl(&dev->icmsr) & (MSR_MAT | MSR_MDE))
- != (MSR_MAT | MSR_MDE))
+ while ((readl(&dev->icmsr) & (MSR_MAT | MSR_MDR))
+ != (MSR_MAT | MSR_MDR))
udelay(10);
/* clear ESG */