Marc Jones (marc.jones@se-eng.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8715
-gerrit
commit 31add36212bb6bc9ee9149aca82dbf4f14550ada Author: Furquan Shaikh furquan@google.com Date: Fri Jul 25 14:52:57 2014 -0700
t132: Add support for tpm i2c
Iniitialize I2C bus required for TPM operation. Problem observed was that if frequency is raised above 20KHz, TPM starts responding with NAKs either for address or for data. Need to look into that.
BUG=None BRANCH=None TEST=Compiles successfully and TPM success messages seen while booting.
Original-Change-Id: I9e1b4958d2ec010e31179df12a099277e6ce09e0 Original-Signed-off-by: Furquan Shaikh furquan@google.com Original-Reviewed-on: https://chromium-review.googlesource.com/210001 Original-Tested-by: Furquan Shaikh furquan@chromium.org Original-Reviewed-by: Aaron Durbin adurbin@chromium.org Original-Commit-Queue: Aaron Durbin adurbin@chromium.org (cherry picked from commit 01e87ae35431147f442e3f3e531537b8f0de1c9d) Signed-off-by: Marc Jones marc.jones@se-eng.com
Change-Id: I7dddc39d77f9a726fa51dd58ea9b7712c9a6fae2 --- src/mainboard/google/rush/romstage.c | 32 ++++++++++++++++++++++++++ src/soc/nvidia/tegra132/include/soc/romstage.h | 1 + src/soc/nvidia/tegra132/romstage.c | 3 +++ 3 files changed, 36 insertions(+)
diff --git a/src/mainboard/google/rush/romstage.c b/src/mainboard/google/rush/romstage.c index bb173c0..7c01a30 100644 --- a/src/mainboard/google/rush/romstage.c +++ b/src/mainboard/google/rush/romstage.c @@ -19,6 +19,38 @@
#include <soc/romstage.h>
+#include <soc/addressmap.h> +#include <soc/clock.h> +#include <soc/nvidia/tegra/i2c.h> +#include <soc/nvidia/tegra132/pinmux.h> +#include <soc/nvidia/tegra132/gpio.h> + +static struct clk_rst_ctlr *clk_rst = (void *)TEGRA_CLK_RST_BASE; + +static void configure_tpm_i2c_bus(void) +{ + clock_configure_i2c_scl_freq(i2c3, PLLP, 19); + + i2c_init(2); +} + +void mainboard_init_tpm_i2c(void) +{ + clock_enable_clear_reset(0, 0, CLK_U_I2C3, 0, 0, 0); + + gpio_output(GPIO(I5), 1); + + // I2C3 (cam) clock. + pinmux_set_config(PINMUX_CAM_I2C_SCL_INDEX, + PINMUX_CAM_I2C_SCL_FUNC_I2C3 | PINMUX_INPUT_ENABLE); + // I2C3 (cam) data. + pinmux_set_config(PINMUX_CAM_I2C_SDA_INDEX, + PINMUX_CAM_I2C_SDA_FUNC_I2C3 | PINMUX_INPUT_ENABLE); + + + configure_tpm_i2c_bus(); +} + void mainboard_configure_pmc(void) { } diff --git a/src/soc/nvidia/tegra132/include/soc/romstage.h b/src/soc/nvidia/tegra132/include/soc/romstage.h index f9eac26..f669121 100644 --- a/src/soc/nvidia/tegra132/include/soc/romstage.h +++ b/src/soc/nvidia/tegra132/include/soc/romstage.h @@ -22,5 +22,6 @@
void mainboard_configure_pmc(void); void mainboard_enable_vdd_cpu(void); +void mainboard_init_tpm_i2c(void);
#endif /* __SOC_NVIDIA_TEGRA132_SOC_ROMSTAGE_H__ */ diff --git a/src/soc/nvidia/tegra132/romstage.c b/src/soc/nvidia/tegra132/romstage.c index 812d147..69271f0 100644 --- a/src/soc/nvidia/tegra132/romstage.c +++ b/src/soc/nvidia/tegra132/romstage.c @@ -30,6 +30,7 @@ #include "ccplex.h"
#include <soc/clock.h> +#include <soc/romstage.h>
void romstage(void); void romstage(void) @@ -66,6 +67,8 @@ void romstage(void) ccplex_load_mts(); printk(BIOS_INFO, "T132 romstage: MTS loading done\n");
+ mainboard_init_tpm_i2c(); + entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA, CONFIG_CBFS_PREFIX "/ramstage");
-
Marc Jones