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Diffstat (limited to 'src/drivers/i2c')
-rw-r--r--src/drivers/i2c/designware/dw_i2c.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/src/drivers/i2c/designware/dw_i2c.c b/src/drivers/i2c/designware/dw_i2c.c
index 3181e7a0cf..c0212c3e27 100644
--- a/src/drivers/i2c/designware/dw_i2c.c
+++ b/src/drivers/i2c/designware/dw_i2c.c
@@ -419,6 +419,15 @@ static int _dw_i2c_transfer(unsigned int bus, const struct i2c_msg *segments,
/* Read to clear INTR_STAT_STOP_DET */
read32(&regs->clear_stop_det_intr);
+ /* Check TX abort */
+ if (read32(&regs->raw_intr_stat) & INTR_STAT_TX_ABORT) {
+ printk(BIOS_ERR, "I2C TX abort detected (%08x)\n",
+ read32(&regs->tx_abort_source));
+ /* clear INTR_STAT_TX_ABORT */
+ read32(&regs->clear_tx_abrt_intr);
+ goto out;
+ }
+
/* Wait for the bus to go idle */
if (dw_i2c_wait_for_bus_idle(regs)) {
printk(BIOS_ERR, "I2C timeout waiting for bus %u idle\n", bus);
@@ -747,8 +756,8 @@ int dw_i2c_init(unsigned int bus, const struct dw_i2c_bus_config *bcfg)
write32(&regs->rx_thresh, 0);
write32(&regs->tx_thresh, 0);
- /* Enable stop detection interrupt */
- write32(&regs->intr_mask, INTR_STAT_STOP_DET);
+ /* Enable stop detection and TX abort interrupt */
+ write32(&regs->intr_mask, INTR_STAT_STOP_DET | INTR_STAT_TX_ABORT);
printk(BIOS_INFO, "DW I2C bus %u at %p (%u KHz)\n",
bus, regs, speed / KHz);