36fd82dfc4
This CL makes slight changes to the ChromeOS-specific GPIO definitions of Tegra and Rockchip boards to prepare them for new features in depthcharge. It adds descriptions for the EC in RW and reset GPIOs, changes the value Tegra writes into the (previously unused) 'port' field to describe the complete GPIO information, and removes code to sample some GPIOs that don't need to be sampled at coreboot time (to help depthcharge detect errors and avoid using a stale value for something that should always represent the current state). BRANCH=None BUG=None TEST=None (tested together with depthcharge patches) Change-Id: I3774979dbe7cacce4932c85810596d80e5664028 Signed-off-by: Stefan Reinauer <reinauer@chromium.org> Original-Commit-Id: df295d0432fbf623597cf36ebb170bd4f63ee08d Original-Change-Id: I36bb16c8d931f862bf12a5b862b10cf18d738ddd Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/231222 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/9570 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2014 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <boot/coreboot_tables.h>
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#include <console/console.h>
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#include <ec/google/chromeec/ec.h>
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#include <ec/google/chromeec/ec_commands.h>
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#include <gpio.h>
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#include <string.h>
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#include <vendorcode/google/chromeos/chromeos.h>
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void fill_lb_gpios(struct lb_gpios *gpios)
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{
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int count = 0;
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/* Write Protect: active low */
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gpios->gpios[count].port = GPIO(R1);
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gpios->gpios[count].polarity = ACTIVE_LOW;
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gpios->gpios[count].value = gpio_get(GPIO(R1));
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strncpy((char *)gpios->gpios[count].name, "write protect",
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GPIO_MAX_NAME_LENGTH);
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count++;
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/* Recovery: active high */
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gpios->gpios[count].port = -1;
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gpios->gpios[count].polarity = ACTIVE_HIGH;
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gpios->gpios[count].value = get_recovery_mode_switch();
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strncpy((char *)gpios->gpios[count].name, "recovery",
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GPIO_MAX_NAME_LENGTH);
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count++;
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/* Lid: active high */
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gpios->gpios[count].port = GPIO(R4);
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gpios->gpios[count].polarity = ACTIVE_HIGH;
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gpios->gpios[count].value = -1;
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strncpy((char *)gpios->gpios[count].name, "lid", GPIO_MAX_NAME_LENGTH);
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count++;
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/* Power: active low */
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gpios->gpios[count].port = GPIO(Q0);
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gpios->gpios[count].polarity = ACTIVE_LOW;
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gpios->gpios[count].value = -1;
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strncpy((char *)gpios->gpios[count].name, "power",
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GPIO_MAX_NAME_LENGTH);
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count++;
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/* Developer: virtual GPIO active high */
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gpios->gpios[count].port = -1;
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gpios->gpios[count].polarity = ACTIVE_HIGH;
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gpios->gpios[count].value = get_developer_mode_switch();
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strncpy((char *)gpios->gpios[count].name, "developer",
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GPIO_MAX_NAME_LENGTH);
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count++;
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/* Reset: active low (output) */
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gpios->gpios[count].port = GPIO(I5);
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gpios->gpios[count].polarity = ACTIVE_LOW;
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gpios->gpios[count].value = -1;
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strncpy((char *)gpios->gpios[count].name, "reset",
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GPIO_MAX_NAME_LENGTH);
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count++;
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gpios->size = sizeof(*gpios) + (count * sizeof(struct lb_gpio));
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gpios->count = count;
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printk(BIOS_ERR, "Added %d GPIOS size %d\n", count, gpios->size);
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}
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int get_developer_mode_switch(void)
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{
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return 0;
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}
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int get_recovery_mode_switch(void)
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{
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uint32_t ec_events;
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ec_events = google_chromeec_get_events_b();
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return !!(ec_events &
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EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY));
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}
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int get_write_protect_state(void)
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{
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return !gpio_get(GPIO(R1));
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}
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