diff options
Diffstat (limited to 'src/drivers/i2c/designware')
| -rw-r--r-- | src/drivers/i2c/designware/dw_i2c.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/drivers/i2c/designware/dw_i2c.c b/src/drivers/i2c/designware/dw_i2c.c index 2cc236e81b..56f3f27c1d 100644 --- a/src/drivers/i2c/designware/dw_i2c.c +++ b/src/drivers/i2c/designware/dw_i2c.c @@ -13,6 +13,8 @@ /* Use a ~10ms timeout for various operations */ #define DW_I2C_TIMEOUT_US 10000 +/* Timeout for waiting for FIFO to flush */ +#define DW_I2C_FLUSH_TIMEOUT_US 160000 /* High and low times in different speed modes (in ns) */ enum { @@ -290,7 +292,7 @@ static enum cb_err dw_i2c_wait_for_bus_idle(struct dw_i2c_regs *regs) struct stopwatch sw; /* Start timeout for up to 16 bytes in FIFO */ - stopwatch_init_usecs_expire(&sw, 16 * DW_I2C_TIMEOUT_US); + stopwatch_init_usecs_expire(&sw, DW_I2C_FLUSH_TIMEOUT_US); while (!stopwatch_expired(&sw)) { uint32_t status = read32(®s->status); @@ -316,7 +318,7 @@ static enum cb_err dw_i2c_transfer_byte(struct dw_i2c_regs *regs, struct stopwatch sw; uint32_t cmd = CMD_DATA_CMD; /* Read op */ - stopwatch_init_usecs_expire(&sw, DW_I2C_TIMEOUT_US); + stopwatch_init_usecs_expire(&sw, CONFIG_I2C_TRANSFER_TIMEOUT_US); if (!(segment->flags & I2C_M_RD)) { /* Write op only: Wait for FIFO not full */ @@ -409,7 +411,7 @@ static enum cb_err _dw_i2c_transfer(unsigned int bus, const struct i2c_msg *segm } /* Wait for interrupt status to indicate transfer is complete */ - stopwatch_init_usecs_expire(&sw, DW_I2C_TIMEOUT_US); + stopwatch_init_usecs_expire(&sw, CONFIG_I2C_TRANSFER_TIMEOUT_US); while (!(read32(®s->raw_intr_stat) & INTR_STAT_STOP_DET)) { if (stopwatch_expired(&sw)) { printk(BIOS_ERR, "I2C stop bit not received\n"); @@ -436,7 +438,7 @@ static enum cb_err _dw_i2c_transfer(unsigned int bus, const struct i2c_msg *segm } /* Flush the RX FIFO in case it is not empty */ - stopwatch_init_usecs_expire(&sw, 16 * DW_I2C_TIMEOUT_US); + stopwatch_init_usecs_expire(&sw, DW_I2C_FLUSH_TIMEOUT_US); while (read32(®s->status) & STATUS_RX_FIFO_NOT_EMPTY) { if (stopwatch_expired(&sw)) { printk(BIOS_ERR, "I2C timeout flushing RX FIFO\n"); |