diff options
| author | Eric Lai <eric_lai@quanta.corp-partner.google.com> | 2022-03-23 08:48:03 +0800 |
|---|---|---|
| committer | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2022-03-25 15:58:19 +0000 |
| commit | c4ca20f67ff37b59acfc7779829ac28cd30effb9 (patch) | |
| tree | f1d01febed3439abc237cf9f06316a3ef4aff995 /src/drivers | |
| parent | 66f99f7fa7e7644e2549619b375e758492b601e3 (diff) | |
drivers/i2c/tpm: Work around missing board_cfg in Ti50 FW under 0.15
Ti50 FW under 0.15 is not support board cfg command which causes I2C
errors and entering recovery mode. And ODM stocks are 0.12 pre-flashed.
Add workaround for the old Ti50 chip.
BUG=b:224650720
TEST=no I2C errors in coreboot.
[ERROR] cr50_i2c_read: Address write failed
[INFO ] .I2C stop bit not received
Signed-off-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Change-Id: Ieec7842ca66b4c690df04a400cebcf45138c745d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63011
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/i2c/tpm/Kconfig | 9 | ||||
| -rw-r--r-- | src/drivers/i2c/tpm/cr50.c | 4 |
2 files changed, 12 insertions, 1 deletions
diff --git a/src/drivers/i2c/tpm/Kconfig b/src/drivers/i2c/tpm/Kconfig index dcf9060952..0d5f06bbdd 100644 --- a/src/drivers/i2c/tpm/Kconfig +++ b/src/drivers/i2c/tpm/Kconfig @@ -24,6 +24,15 @@ config MAINBOARD_HAS_I2C_TPM_GENERIC help Board has a generic I2C TPM support +config MAINBOARD_NEEDS_I2C_TI50_WORKAROUND + bool + default n + help + Ti50 FW versions below 0.15 don't support the firmware_version or board_cfg registers, + and trying to access them causes I2C errors. This config will skip accesses to these + registers, and should be selected for boards using Ti50 chips with FW < 0.15. The config + will be removed once all Ti50 stocks are updated to 0.15 or higher. + config DRIVER_TIS_DEFAULT bool depends on I2C_TPM diff --git a/src/drivers/i2c/tpm/cr50.c b/src/drivers/i2c/tpm/cr50.c index ce2278b8c6..7eb066d1c5 100644 --- a/src/drivers/i2c/tpm/cr50.c +++ b/src/drivers/i2c/tpm/cr50.c @@ -500,7 +500,9 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr) printk(BIOS_DEBUG, "cr50 TPM 2.0 (i2c %u:0x%02x id 0x%x)\n", bus, dev_addr, did_vid >> 16); - if (tpm_first_access_this_boot()) { + /* Ti50 FW version under 0.15 doesn't support board cfg command + TODO: remove this flag after all stocks Ti50 uprev to 0.15 or above */ + if (!CONFIG(MAINBOARD_NEEDS_I2C_TI50_WORKAROUND) && tpm_first_access_this_boot()) { /* This is called for the side-effect of printing the version string. */ cr50_get_firmware_version(&ver); cr50_set_board_cfg(); |