diff options
Diffstat (limited to 'src/mainboard/google/cyan/chromeos.c')
-rw-r--r-- | src/mainboard/google/cyan/chromeos.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/src/mainboard/google/cyan/chromeos.c b/src/mainboard/google/cyan/chromeos.c new file mode 100644 index 0000000000..9e4afe6326 --- /dev/null +++ b/src/mainboard/google/cyan/chromeos.c @@ -0,0 +1,136 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * Copyright (C) 2015 Intel Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc. + */ + +#include <arch/io.h> +#include <device/device.h> +#include <device/pci.h> +#if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC) +#include "ec.h" +#include <ec/google/chromeec/ec.h> +#endif +#include <rules.h> +#include <soc/gpio.h> +#include <string.h> +#include <vendorcode/google/chromeos/chromeos.h> + +/* The WP status pin lives on MF_ISH_GPIO_4 */ +#define WP_STATUS_PAD_CFG0 0x4838 +#define WP_STATUS_PAD_CFG1 0x483C + +#if ENV_RAMSTAGE +#include <boot/coreboot_tables.h> + +#define GPIO_COUNT 6 +#define ACTIVE_LOW 0 +#define ACTIVE_HIGH 1 + +void fill_lb_gpios(struct lb_gpios *gpios) +{ + struct lb_gpio *gpio; + + gpios->size = sizeof(*gpios) + (GPIO_COUNT * sizeof(struct lb_gpio)); + gpios->count = GPIO_COUNT; + + gpio = gpios->gpios; + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "write protect", + get_write_protect_state()); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "recovery", + recovery_mode_enabled()); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "developer", + get_developer_mode_switch()); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "lid", get_lid_switch()); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "power", 0); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "oprom", gfx_get_init_done()); +} +#endif /* ENV_RAMSTAGE */ + +int get_lid_switch(void) +{ +#if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC) + u8 ec_switches; + + mec_io_bytes(0, EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SWITCHES, 1, + &ec_switches, NULL); + return !!(ec_switches & EC_SWITCH_LID_OPEN); +#else + /* Default to force open. */ + return 1; +#endif +} + +int get_developer_mode_switch(void) +{ + return 0; +} + +int get_recovery_mode_switch(void) +{ +#if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC) + u8 ec_switches; + u32 ec_events; + + mec_io_bytes(0, EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SWITCHES, 1, + &ec_switches, NULL); + + /* If a switch is set, we don't need to look at events. */ + if (ec_switches & (EC_SWITCH_DEDICATED_RECOVERY)) + return 1; + + /* Else check if the EC has posted the keyboard recovery event. */ + ec_events = google_chromeec_get_events_b(); + + return !!(ec_events & + EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY)); +#else + return 0; +#endif +} + +int clear_recovery_mode_switch(void) +{ +#if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC) + const uint32_t kb_rec_mask = + EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY); + /* Unconditionally clear the EC recovery request. */ + return google_chromeec_clear_events_b(kb_rec_mask); +#else + return 0; +#endif +} + +int get_write_protect_state(void) +{ + /* + * The vboot loader queries this function in romstage. The GPIOs have + * not been set up yet as that configuration is done in ramstage. + * Configuring this GPIO as input so that there isn't any ambiguity + * in the reading. + */ +#if ENV_ROMSTAGE + write32((void *)(COMMUNITY_GPEAST_BASE + WP_STATUS_PAD_CFG0), + (PAD_PULL_UP_20K | PAD_GPIO_ENABLE | PAD_CONFIG0_GPI_DEFAULT)); + write32((void *)(COMMUNITY_GPEAST_BASE + WP_STATUS_PAD_CFG1), + PAD_CONFIG1_DEFAULT0); +#endif + + /* WP is enabled when the pin is reading high. */ + return (read32((void *)(COMMUNITY_GPEAST_BASE + WP_STATUS_PAD_CFG0)) + & PAD_VAL_HIGH); +} |