diff options
Diffstat (limited to 'src/mainboard/google/panther/chromeos.c')
| -rw-r--r-- | src/mainboard/google/panther/chromeos.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/mainboard/google/panther/chromeos.c b/src/mainboard/google/panther/chromeos.c new file mode 100644 index 0000000000..074f648a68 --- /dev/null +++ b/src/mainboard/google/panther/chromeos.c @@ -0,0 +1,117 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Google Inc. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <string.h> +#include <vendorcode/google/chromeos/chromeos.h> +#include <arch/io.h> +#include <device/device.h> +#include <device/pci.h> +#include <southbridge/intel/lynxpoint/pch.h> + +#define GPIO_SPI_WP 58 +#define GPIO_REC_MODE 12 + +#define FLAG_SPI_WP 0 +#define FLAG_REC_MODE 1 +#define FLAG_DEV_MODE 2 + +#ifndef __PRE_RAM__ +#include <boot/coreboot_tables.h> + +#define GPIO_COUNT 6 +#define ACTIVE_LOW 0 +#define ACTIVE_HIGH 1 + +static void fill_lb_gpio(struct lb_gpio *gpio, int num, + int polarity, const char *name, int force) +{ + memset(gpio, 0, sizeof(*gpio)); + gpio->port = num; + gpio->polarity = polarity; + if (force >= 0) + gpio->value = force; + else if (num >= 0) + gpio->value = get_gpio(num); + strncpy((char *)gpio->name, name, GPIO_MAX_NAME_LENGTH); +} + +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++, GPIO_SPI_WP, ACTIVE_HIGH, "write protect", 0); + fill_lb_gpio(gpio++, GPIO_REC_MODE, ACTIVE_LOW, "recovery", + get_recovery_mode_switch()); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "developer", + get_developer_mode_switch()); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "lid", 1); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "power", 0); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "oprom", oprom_is_loaded); +} +#endif + +int get_write_protect_state(void) +{ + device_t dev; +#ifdef __PRE_RAM__ + dev = PCI_DEV(0, 0x1f, 2); +#else + dev = dev_find_slot(0, PCI_DEVFN(0x1f, 2)); +#endif + return (pci_read_config32(dev, SATA_SP) >> FLAG_SPI_WP) & 1; +} + +int get_developer_mode_switch(void) +{ + return 0; +} + +int get_recovery_mode_switch(void) +{ + device_t dev; +#ifdef __PRE_RAM__ + dev = PCI_DEV(0, 0x1f, 2); +#else + dev = dev_find_slot(0, PCI_DEVFN(0x1f, 2)); +#endif + return (pci_read_config32(dev, SATA_SP) >> FLAG_REC_MODE) & 1; +} + +#ifdef __PRE_RAM__ +void save_chromeos_gpios(void) +{ + u32 flags = 0; + + /* Write Protect: GPIO58 = GPIO_SPI_WP, active high */ + if (get_gpio(GPIO_SPI_WP)) + flags |= (1 << FLAG_SPI_WP); + + /* Recovery: GPIO12 = RECOVERY_L, active low */ + if (!get_gpio(GPIO_REC_MODE)) + flags |= (1 << FLAG_REC_MODE); + + /* Developer: Virtual */ + + pci_write_config32(PCI_DEV(0, 0x1f, 2), SATA_SP, flags); +} +#endif |