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ipq806x: i2c: write function fixed to avoid spurious success 

The qup_i2c_write_fifo() made to query QUP_I2C_MASTER_STATUS after QUP
transitions into PAUSE state to ensure that it captures the correct status.
Handled more error bits.

BRANCH=chromeos-2013.04
BUG=chrome-os-partner:35328
TEST=Booted up storm P0.2, verified that the TPM on GSBI1 works.
     Verified that SUCCESS is not reported when the write FIFO has failed.

Change-Id: Ia91638d37b3fa8449630aa2cf932114363b2db78
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 75e0d59d2e6ba03182003f22944dbf99ce3eb412
Original-Change-Id: Ic4e8e85686499ce71ad3258b52e687ceff36a1f8
Original-Signed-off-by: Sourabh Banerjee <sbanerje@codeaurora.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/254495
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Commit-Queue: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://review.coreboot.org/9823
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Sourabh Banerjee 2015-02-27 19:18:11 +05:30 committed by Patrick Georgi
parent 44c5105890
commit f36cffc07a
2 changed files with 12 additions and 1 deletions
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5
src/soc/qualcomm/ipq806x/include/soc/qup.h
View File

@ -109,7 +109,9 @@
#define QUP_I2C_INVALID_READ_ADDR (1 << 24)
#define QUP_I2C_INVALID_TAG (1 << 23)
#define QUP_I2C_FAILED_MASK (0x3 << 6)
#define QUP_I2C_INVALID_WRITE (1 << 5)
#define QUP_I2C_ARB_LOST (1 << 4)
#define QUP_I2C_PACKET_NACK (1 << 3)
#define QUP_I2C_BUS_ERROR (1 << 2)
typedef enum {
@ -123,6 +125,9 @@ typedef enum {
QUP_ERR_I2C_BUS_ERROR,
QUP_ERR_I2C_INVALID_SLAVE_ADDR,
QUP_ERR_XFER_FAIL,
QUP_ERR_I2C_NACK,
QUP_ERR_I2C_INVALID_WRITE,
QUP_ERR_I2C_INVALID_TAG,
QUP_ERR_UNDEFINED,
} qup_return_t;

8
src/soc/qualcomm/ipq806x/qup.c
View File

@ -63,6 +63,12 @@ static qup_return_t qup_i2c_master_status(gsbi_id_t gsbi_id)
return QUP_ERR_I2C_ARB_LOST;
if (reg_val & QUP_I2C_BUS_ERROR)
return QUP_ERR_I2C_BUS_ERROR;
if (reg_val & QUP_I2C_INVALID_WRITE)
return QUP_ERR_I2C_INVALID_WRITE;
if (reg_val & QUP_I2C_PACKET_NACK)
return QUP_ERR_I2C_NACK;
if (reg_val & QUP_I2C_INVALID_TAG)
return QUP_ERR_I2C_INVALID_TAG;
return QUP_SUCCESS;
}
@ -193,7 +199,7 @@ static qup_return_t qup_i2c_write_fifo(gsbi_id_t gsbi_id, qup_data_t *p_tx_obj,
return ret;
qup_set_state(gsbi_id, QUP_STATE_PAUSE);
return QUP_SUCCESS;
return qup_i2c_master_status(gsbi_id);
}
static qup_return_t qup_i2c_write(gsbi_id_t gsbi_id, uint8_t mode,