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authorJulius Werner <jwerner@chromium.org>2016-07-28 13:41:37 -0700
committerMartin Roth <martinroth@google.com>2016-08-03 18:23:23 +0200
commit40d62f3db7c77bc4d48d3a584ac607b348c44d8c (patch)
treeaa6edc29645fd42753b39045bd6c2d69dc96631c /src/mainboard/google/gru
parent5e6771b1cb2ee4f12c7991e04c0f0f9acf9c3e0a (diff)
downloadcoreboot-40d62f3db7c77bc4d48d3a584ac607b348c44d8c.tar.xz
google/gru: Add code to support I2C TPM for Kevin
Coming Kevin revisions will switch back to an I2C TPM. This patch adds the required configuration options and code to support that. Since the TPM type can currently only be changed at compile time, we can no longer support older Kevins with the same image. In order to build for Kevin revisions < 5, you have to explicitly override the CONFIG_GRU_HAS_TPM2. BRANCH=None BUG=chrome-os-partner:55523 TEST=Compiled both Kevin and Gru, confirmed that bootblock and verstage binary had the appropriate code differences. Change-Id: I1b2abe0f331eb103eb0a84f773ee7521d31ae5d8 Signed-off-by: Martin Roth <martinroth@chromium.org> Original-Commit-Id: 3245bff937154f0f9f39894de9c98a75631d59d9 Original-Change-Id: I81a15c9fb037a7ca2d69818e46cbb4f9a5ae1989 Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/364222 Original-Reviewed-by: Douglas Anderson <dianders@chromium.org> Reviewed-on: https://review.coreboot.org/16029 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/mainboard/google/gru')
-rw-r--r--src/mainboard/google/gru/Kconfig19
-rw-r--r--src/mainboard/google/gru/bootblock.c14
2 files changed, 28 insertions, 5 deletions
diff --git a/src/mainboard/google/gru/Kconfig b/src/mainboard/google/gru/Kconfig
index 1b657d9a78..d5733c8312 100644
--- a/src/mainboard/google/gru/Kconfig
+++ b/src/mainboard/google/gru/Kconfig
@@ -18,6 +18,13 @@ config BOARD_GOOGLE_GRU_COMMON # Umbrella option to be selected by variant boar
if BOARD_GOOGLE_GRU_COMMON
+# Most Grus have TPM2 but later Kevins don't... decide this in one place for
+# convenience. Explicitly override it when building for earlier Kevins.
+config GRU_HAS_TPM2
+ bool "Build for a board revision with a SPI TPM 2.0"
+ default n if BOARD_GOOGLE_KEVIN
+ default y
+
config BOARD_SPECIFIC_OPTIONS
def_bool y
select BOARD_ID_AUTO
@@ -30,7 +37,7 @@ config BOARD_SPECIFIC_OPTIONS
select MAINBOARD_DO_NATIVE_VGA_INIT
select MAINBOARD_HAS_CHROMEOS
select MAINBOARD_HAS_NATIVE_VGA_INIT
- select MAINBOARD_HAS_TPM2
+ select MAINBOARD_HAS_TPM2 if GRU_HAS_TPM2
select RAM_CODE_SUPPORT
select RTC
select SOC_ROCKCHIP_RK3399
@@ -40,7 +47,7 @@ config BOARD_SPECIFIC_OPTIONS
config CHROMEOS
select EC_SOFTWARE_SYNC
- select SPI_TPM
+ select SPI_TPM if GRU_HAS_TPM2
select VBOOT_VBNV_FLASH
select VIRTUAL_DEV_SWITCH
@@ -64,6 +71,14 @@ config BOOT_MEDIA_SPI_BUS
int
default 1
+config DRIVER_TPM_I2C_BUS
+ hex
+ default 0
+
+config DRIVER_TPM_I2C_ADDR
+ hex
+ default 0x20
+
config CONSOLE_SERIAL_UART_ADDRESS
hex
depends on DRIVERS_UART
diff --git a/src/mainboard/google/gru/bootblock.c b/src/mainboard/google/gru/bootblock.c
index 20334953a1..8f88043f92 100644
--- a/src/mainboard/google/gru/bootblock.c
+++ b/src/mainboard/google/gru/bootblock.c
@@ -18,6 +18,7 @@
#include <bootblock_common.h>
#include <soc/grf.h>
#include <gpio.h>
+#include <soc/i2c.h>
#include <soc/spi.h>
#include <console/console.h>
@@ -68,9 +69,16 @@ void bootblock_mainboard_init(void)
write32(&rk3399_grf->iomux_spi5, IOMUX_SPI5);
rockchip_spi_init(CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS, 3093750);
- /* Set pinmux and configure TPM SPI, which is not very fast. */
- write32(&rk3399_grf->iomux_spi0, IOMUX_SPI0);
- rockchip_spi_init(CONFIG_DRIVER_TPM_SPI_BUS, 1500*KHz);
+ if (IS_ENABLED(CONFIG_GRU_HAS_TPM2)) {
+ /* Set pinmux and configure TPM SPI, which is not very fast. */
+ write32(&rk3399_grf->iomux_spi0, IOMUX_SPI0);
+ rockchip_spi_init(CONFIG_DRIVER_TPM_SPI_BUS, 1500*KHz);
+ } else {
+ /* Set pinmux and configure TPM I2C */
+ write32(&rk3399_pmugrf->iomux_i2c0_scl, IOMUX_I2C0_SCL);
+ write32(&rk3399_pmugrf->iomux_i2c0_sda, IOMUX_I2C0_SDA);
+ i2c_init(0, 400*KHz);
+ }
setup_chromeos_gpios();
}