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Diffstat (limited to 'src/mainboard/google/link/chromeos.c')
| -rw-r--r-- | src/mainboard/google/link/chromeos.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/mainboard/google/link/chromeos.c b/src/mainboard/google/link/chromeos.c new file mode 100644 index 0000000000..04f68a9b1a --- /dev/null +++ b/src/mainboard/google/link/chromeos.c @@ -0,0 +1,124 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 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> +#ifdef __PRE_RAM__ +#include <arch/romcc_io.h> +#else +#include <device/device.h> +#include <device/pci.h> +#endif +#include <southbridge/intel/bd82x6x/pch.h> +#include "ec.h" +#include <ec/google/chromeec/ec.h> + +#ifndef __PRE_RAM__ +#include <boot/coreboot_tables.h> +#include <arch/coreboot_tables.h> + +#define GPIO_COUNT 6 +#define ACTIVE_LOW 0 +#define ACTIVE_HIGH 1 + +static int get_lid_switch(void) +{ + u8 ec_switches = inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SWITCHES); + + return !!(ec_switches & EC_SWITCH_LID_OPEN); +} + +void fill_lb_gpios(struct lb_gpios *gpios) +{ + device_t dev = dev_find_slot(0, PCI_DEVFN(0x1f,0)); + u16 gpio_base = pci_read_config32(dev, GPIOBASE) & 0xfffe; + //u16 gen_pmcon_1 = pci_read_config32(dev, GEN_PMCON_1); + + if (!gpio_base) + return; + + u32 gp_lvl2 = inl(gpio_base + 0x38); + + gpios->size = sizeof(*gpios) + (GPIO_COUNT * sizeof(struct lb_gpio)); + gpios->count = GPIO_COUNT; + + /* Write Protect: GPIO57 = PCH_SPI_WP_D */ + gpios->gpios[0].port = 57; + gpios->gpios[0].polarity = ACTIVE_HIGH; + gpios->gpios[0].value = (gp_lvl2 >> (57 - 32)) & 1; + strncpy((char *)gpios->gpios[0].name,"write protect", + GPIO_MAX_NAME_LENGTH); + /* Recovery: the "switch" comes from the EC */ + gpios->gpios[1].port = -1; /* Indicate that this is a pseudo GPIO */ + gpios->gpios[1].polarity = ACTIVE_HIGH; + gpios->gpios[1].value = get_recovery_mode_switch(); + strncpy((char *)gpios->gpios[1].name,"recovery", GPIO_MAX_NAME_LENGTH); + + /* Lid: the "switch" comes from the EC */ + gpios->gpios[2].port = -1; + gpios->gpios[2].polarity = ACTIVE_HIGH; + gpios->gpios[2].value = get_lid_switch(); + strncpy((char *)gpios->gpios[2].name,"lid", GPIO_MAX_NAME_LENGTH); + + /* Power Button: hard-coded as not pressed; we'll detect later presses + * via SMI. */ + gpios->gpios[3].port = -1; + gpios->gpios[3].polarity = ACTIVE_HIGH; + gpios->gpios[3].value = 0; + strncpy((char *)gpios->gpios[3].name,"power", GPIO_MAX_NAME_LENGTH); + + /* Developer: a tricky case on Link, there is no switch */ + gpios->gpios[4].port = -1; /* Indicate that this is a pseudo GPIO */ + gpios->gpios[4].polarity = ACTIVE_HIGH; + gpios->gpios[4].value = get_developer_mode_switch(); + strncpy((char *)gpios->gpios[4].name,"developer", GPIO_MAX_NAME_LENGTH); + + /* Did we load the VGA Option ROM? */ + gpios->gpios[5].port = -1; /* Indicate that this is a pseudo GPIO */ + gpios->gpios[5].polarity = ACTIVE_HIGH; + gpios->gpios[5].value = oprom_is_loaded; + strncpy((char *)gpios->gpios[5].name,"oprom", GPIO_MAX_NAME_LENGTH); +} +#endif + +/* The dev-switch is virtual on Link (and so handled elsewhere). */ +int get_developer_mode_switch(void) +{ + return 0; +} + +/* There are actually two recovery switches. One is the magic keyboard chord, + * the other is driven by Servo. */ +int get_recovery_mode_switch(void) +{ + u8 ec_switches = inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SWITCHES); + u32 ec_events; + + /* If a switch is set, we don't need to look at events. */ + if (ec_switches & (EC_SWITCH_KEYBOARD_RECOVERY | + 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)); +} |