diff options
| author | Andrey Petrov <andrey.petrov@intel.com> | 2016-02-05 11:27:44 -0800 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-04-28 05:38:34 +0200 |
| commit | e976bd44692d2adb320a1256f1b6bfaa6469108a (patch) | |
| tree | 32321588165b81c5fd0c91c859b238df52086ee2 /src/soc/intel/apollolake/bootblock | |
| parent | f748f83ecb389552e7afe10ce8837b5173534b96 (diff) | |
soc/intel/apollolake: Enable LPC bus interface
This adds early LPC setup in bootblock (for Chrome EC) as well as
late (ramstage) IO decode/sirq enable.
Change-Id: Ic270e66dbf07240229d4783f80e2ec02007c36c2
Signed-off-by: Divya Sasidharan <divya.s.sasidharan@intel.com>
Signed-off-by: Freddy Paul <freddy.paul@intel.com>
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/14469
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel/apollolake/bootblock')
| -rw-r--r-- | src/soc/intel/apollolake/bootblock/bootblock.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/bootblock/bootblock.c b/src/soc/intel/apollolake/bootblock/bootblock.c index be07776f19..bb3b9c10e9 100644 --- a/src/soc/intel/apollolake/bootblock/bootblock.c +++ b/src/soc/intel/apollolake/bootblock/bootblock.c @@ -20,6 +20,7 @@ #include <soc/bootblock.h> #include <soc/cpu.h> #include <soc/gpio.h> +#include <soc/lpc.h> #include <soc/northbridge.h> #include <soc/pci_devs.h> #include <soc/uart.h> @@ -28,12 +29,36 @@ static const struct pad_config tpm_spi_configs[] = { PAD_CFG_NF(GPIO_106, NATIVE, DEEP, NF3), /* FST_SPI_CS2_N */ }; +static const struct pad_config lpc_gpio_configs[] = { + PAD_CFG_NF(LPC_AD0, NATIVE, DEEP, NF1), + PAD_CFG_NF(LPC_AD1, NATIVE, DEEP, NF1), + PAD_CFG_NF(LPC_AD2, NATIVE, DEEP, NF1), + PAD_CFG_NF(LPC_AD3, NATIVE, DEEP, NF1), + PAD_CFG_NF(LPC_FRAMEB, NATIVE, DEEP, NF1), + PAD_CFG_NF(LPC_CLKOUT0, UP_20K, DEEP, NF1), + PAD_CFG_NF(LPC_CLKOUT1, UP_20K, DEEP, NF1) +}; + static void tpm_enable(void) { /* Configure gpios */ gpio_configure_pads(tpm_spi_configs, ARRAY_SIZE(tpm_spi_configs)); } +static void early_lpc_enable(void) +{ + /* Enable requested fixed IO decode ranges */ + pci_write_config16(LPC_DEV, LPC_EN, LPC_EN_MC1 | LPC_EN_KB | LPC_EN_LGAME); + + /* Enable generic IO decode ranges for 0x800-0x9ff */ + /* FIXME: remove range hardcoding and/or calculate based on EC definitions */ + pci_write_config32(LPC_DEV, LPC_GEN1_DEC, ((0xff & ~3 ) << 8) | 0x800 | 1); + pci_write_config32(LPC_DEV, LPC_GEN2_DEC, ((0xff & ~3 ) << 8) | 0x900 | 1); + + /* GPIO pins need to be configured to specific native function */ + gpio_configure_pads(lpc_gpio_configs, ARRAY_SIZE(lpc_gpio_configs)); +} + void asmlinkage bootblock_c_entry(void) { device_t dev = NB_DEV_ROOT; @@ -59,4 +84,8 @@ void bootblock_soc_early_init(void) if (IS_ENABLED(CONFIG_LPC_TPM)) tpm_enable(); + + if (IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC_LPC)) + early_lpc_enable(); + } |