diff options
Diffstat (limited to 'power/mt817x.c')
| -rw-r--r-- | power/mt817x.c | 818 |
1 files changed, 0 insertions, 818 deletions
diff --git a/power/mt817x.c b/power/mt817x.c deleted file mode 100644 index e7e23605f2..0000000000 --- a/power/mt817x.c +++ /dev/null @@ -1,818 +0,0 @@ -/* Copyright 2015 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -/* - * MT817x SoC power sequencing module for Chrome EC - * - * This implements the following features: - * - * - Cold reset powers on the AP - * - * When powered off: - * - Press pwron turns on the AP - * - Hold pwron turns on the AP, and then 8s later turns it off and leaves - * it off until pwron is released and pressed again - * - * When powered on: - * - The PMIC PWRON signal is released <= 1 second after the power button is - * released - * - Holding pwron for 8s powers off the AP - * - Pressing and releasing pwron within that 8s is ignored - * - If POWER_GOOD is dropped by the AP, then we power the AP off - * - If SUSPEND_L goes low, enter suspend mode. - * - */ - -#include "battery.h" -#include "chipset.h" /* ./common/chipset.c implements chipset functions too */ -#include "common.h" -#include "gpio.h" -#include "hooks.h" -#include "keyboard_scan.h" -#include "lid_switch.h" -#include "power.h" -#include "power_button.h" -#include "power_led.h" -#include "system.h" -#include "task.h" -#include "test_util.h" -#include "util.h" - -#define CPRINTS(format, args...) cprints(CC_CHIPSET, format, ## args) - -#define INT_BOTH_PULL_UP (GPIO_INPUT | GPIO_PULL_UP | GPIO_INT_BOTH) - -/* masks for power signals */ -#define IN_POWER_GOOD POWER_SIGNAL_MASK(MTK_POWER_GOOD) -#define IN_SUSPEND POWER_SIGNAL_MASK(MTK_SUSPEND_ASSERTED) - -/* Long power key press to force shutdown */ -#define DELAY_FORCE_SHUTDOWN (8000 * MSEC) /* 8 seconds */ - -/* - * The power signal from SoC should be kept at least 50ms. - */ -#define POWER_DEBOUNCE_TIME (50 * MSEC) - -/* - * The suspend signal from SoC should be kept at least 50ms. - */ -#define SUSPEND_DEBOUNCE_TIME (50 * MSEC) - -/* - * The time to bootup the PMIC from power-off to power-on. - */ -#define PMIC_PWRON_PRESS_TIME (5000 * MSEC) - -/* - * The minimum time to assert the PMIC THERM pin is 32us. However, - * it needs to be extended to about 50ms to let the 5V rail - * dissipate fully. - */ -#define PMIC_THERM_HOLD_TIME (50 * MSEC) - -/* - * If the power key is pressed to turn on, then held for this long, we - * power off. - * - * Normal case: User releases power button and chipset_task() goes - * into the inner loop, waiting for next event to occur (power button - * press or POWER_GOOD == 0). - */ -#define DELAY_SHUTDOWN_ON_POWER_HOLD (8000 * MSEC) /* 8 seconds */ - -/* - * The hold time for pulling down the PMIC_WARM_RESET_H pin so that - * the AP can entery the recovery mode (flash SPI flash from USB). - */ -#define PMIC_WARM_RESET_H_HOLD_TIME (4 * MSEC) - -/* - * The hold time for pulling down the SYSTEM_POWER_H pin. - */ -#define PMIC_COLD_RESET_L_HOLD_TIME \ - (SUSPEND_DEBOUNCE_TIME + POWER_DEBOUNCE_TIME + (20 * MSEC)) - -/* - * The first time the PMIC sees power (AC or battery) it needs 200ms (+/-12% - * oscillator tolerance) for the RTC startup. In addition there is a startup - * time of approx. 0.5msec until V2_5 regulator starts up. */ -#define PMIC_RTC_STARTUP (225 * MSEC) - -/* Wait for 5V power source stable */ -#define PMIC_WAIT_FOR_5V_POWER_GOOD (1 * MSEC) - -/* - * If POWER_GOOD is lost, wait for PMIC to turn off its power completely - * before we turn off VBAT by set_system_power(0) - */ -#define PMIC_POWER_OFF_DELAY (50 * MSEC) - -/* TODO(crosbug.com/p/25047): move to HOOK_POWER_BUTTON_CHANGE */ -/* 1 if the power button was pressed last time we checked */ -static char power_button_was_pressed; - -/* 1 if lid-open event has been detected */ -static char lid_opened; - -/* time where we will power off, if power button still held down */ -static timestamp_t power_off_deadline; - -/* force AP power on (used for recovery keypress) */ -static int auto_power_on; - -enum power_request_t { - POWER_REQ_NONE, - POWER_REQ_OFF, - POWER_REQ_ON, - - POWER_REQ_COUNT, -}; - -static enum power_request_t power_request; - -/** - * Return values for check_for_power_off_event(). - */ -enum power_off_event_t { - POWER_OFF_CANCEL, - POWER_OFF_BY_POWER_BUTTON_PRESSED, - POWER_OFF_BY_LONG_PRESS, - POWER_OFF_BY_POWER_GOOD_LOST, - POWER_OFF_BY_POWER_REQ, - - POWER_OFF_EVENT_COUNT, -}; - -/** - * Return values for check_for_power_on_event(). - */ -enum power_on_event_t { - POWER_ON_CANCEL, - POWER_ON_BY_IN_POWER_GOOD, - POWER_ON_BY_AUTO_POWER_ON, - POWER_ON_BY_LID_OPEN, - POWER_ON_BY_POWER_BUTTON_PRESSED, - POWER_ON_BY_POWER_REQ_NONE, - - POWER_ON_EVENT_COUNT, -}; - -/** - * Parameters of mtk_backlight_override(). - */ -enum blacklight_override_t { - MTK_BACKLIGHT_FORCE_OFF, - MTK_BACKLIGHT_CONTROL_BY_SOC, - - MTK_BACKLIGHT_OVERRIDE_COUNT, -}; - -/* Forward declaration */ -static void chipset_turn_off_power_rails(void); - -/** - * Check the suspend signal is on after SUSPEND_DEBOUNCE_TIME to avoid transient - * state. - * - * @return non-zero if SUSPEND is asserted. - */ -static int is_suspend_asserted(void) -{ -#ifdef BOARD_OAK - if ((power_get_signals() & IN_SUSPEND) && - (system_get_board_version() < 4)) - usleep(SUSPEND_DEBOUNCE_TIME); -#endif - - return power_get_signals() & IN_SUSPEND; -} - -/** - * Check the suspend signal is off after SUSPEND_DEBOUNCE_TIME to avoid - * transient state. - * - * @return non-zero if SUSPEND is deasserted. - */ -static int is_suspend_deasserted(void) -{ -#ifdef BOARD_OAK - if (!(power_get_signals() & IN_SUSPEND) && - (system_get_board_version() < 4)) - usleep(SUSPEND_DEBOUNCE_TIME); -#endif - - return !(power_get_signals() & IN_SUSPEND); -} - -/** - * Check power good signal is on after POWER_DEBOUNCE_TIME to avoid transient - * state. - * - * @return non-zero if POWER_GOOD is asserted. - */ -static int is_power_good_asserted(void) -{ - if (!gpio_get_level(GPIO_SYSTEM_POWER_H)) - return 0; -#ifdef BOARD_OAK - else if ((power_get_signals() & IN_POWER_GOOD) && - (system_get_board_version() < 4)) - usleep(POWER_DEBOUNCE_TIME); -#endif - - return power_get_signals() & IN_POWER_GOOD; -} - -/** - * Check power good signal is off after POWER_DEBOUNCE_TIME to avoid transient - * state. - * - * @return non-zero if POWER_GOOD is deasserted. - */ -static int is_power_good_deasserted(void) -{ -#ifdef BOARD_OAK - /* - * Warm reset key from servo board lets the POWER_GOOD signal - * deasserted temporarily (about 1~2 seconds) on rev4. - * In order to detect this case, check the AP_RESET_L status, - * ignore the transient state if reset key is pressing. - */ - if (system_get_board_version() >= 4) { - if (0 == gpio_get_level(GPIO_AP_RESET_L)) - return 0; - } else { - if (!(power_get_signals() & IN_POWER_GOOD)) - usleep(POWER_DEBOUNCE_TIME); - } -#endif - if (0 == gpio_get_level(GPIO_AP_RESET_L)) - return 0; - - return !(power_get_signals() & IN_POWER_GOOD); -} - -/** - * Set the system power signal. - * - * @param asserted off (=0) or on (=1) - */ -static void set_system_power(int asserted) -{ - CPRINTS("set_system_power(%d)", asserted); - gpio_set_level(GPIO_SYSTEM_POWER_H, asserted); -} - -/** - * Set the PMIC PWRON signal. - * - * Note that asserting requires holding for PMIC_PWRON_PRESS_TIME. - * - * @param asserted Assert (=1) or deassert (=0) the signal. This is the - * logical level of the pin, not the physical level. - */ -static void set_pmic_pwron(int asserted) -{ - timestamp_t poll_deadline; - /* Signal is active-high */ - CPRINTS("set_pmic_pwron(%d)", asserted); - /* Oak rev1 power-on sequence: - * raise GPIO_SYSTEM_POWER_H - * wait for 5V power good, timeout 1 second - */ - if (asserted) { - set_system_power(asserted); - poll_deadline = get_time(); - poll_deadline.val += SECOND; - while (asserted && !gpio_get_level(GPIO_5V_POWER_GOOD) && - get_time().val < poll_deadline.val) - usleep(PMIC_WAIT_FOR_5V_POWER_GOOD); - if (!gpio_get_level(GPIO_5V_POWER_GOOD)) - CPRINTS("5V power not ready"); - } - - gpio_set_level(GPIO_PMIC_PWRON_H, asserted); -} - -/** - * Set the WARM RESET signal. - * - * @param asserted off (=0) or on (=1) - */ -static void set_warm_reset(int asserted) -{ - board_set_ap_reset(asserted); -} - -/** - * Check for some event triggering the shutdown. - * - * It can be either a long power button press or a shutdown triggered from the - * AP and detected by reading POWER_GOOD. - * - * @return non-zero if a shutdown should happen, 0 if not - */ -static int check_for_power_off_event(void) -{ - timestamp_t now; - int pressed = 0; - - /* - * Check for power button press. - */ - if (power_button_is_pressed()) { - pressed = POWER_OFF_BY_POWER_BUTTON_PRESSED; - } else if (power_request == POWER_REQ_OFF) { - power_request = POWER_REQ_NONE; - /* return non-zero for shudown down */ - return POWER_OFF_BY_POWER_REQ; - } - - now = get_time(); - if (pressed) { - if (!power_button_was_pressed) { - power_off_deadline.val = now.val + DELAY_FORCE_SHUTDOWN; - CPRINTS("power waiting for long press %u", - power_off_deadline.le.lo); - /* Ensure we will wake up to check the power key */ - timer_arm(power_off_deadline, TASK_ID_CHIPSET); - } else if (timestamp_expired(power_off_deadline, &now)) { - power_off_deadline.val = 0; - CPRINTS("power off after long press now=%u, %u", - now.le.lo, power_off_deadline.le.lo); - return POWER_OFF_BY_LONG_PRESS; - } - } else if (power_button_was_pressed) { - CPRINTS("power off cancel"); - timer_cancel(TASK_ID_CHIPSET); - } - - power_button_was_pressed = pressed; - - /* POWER_GOOD released by AP : shutdown immediate */ - if (is_power_good_deasserted()) { - /* - * Cancel long press timer if power is lost and the power button - * still press, otherwise EC will crash. - */ - if (power_button_was_pressed) - timer_cancel(TASK_ID_CHIPSET); - - CPRINTS("POWER_GOOD is lost"); - return POWER_OFF_BY_POWER_GOOD_LOST; - } - - return POWER_OFF_CANCEL; -} - -/** - * Set the LCD backlight enable pin and override the signal from SoC. - * - * @param asserted MTK_BACKLIGHT_FORCE_OFF, force off the panel backlight - * MTK_BACKLIGHT_CONTROL_BY_SOC, leave the control to SOC - */ -static void mtk_backlight_override(enum blacklight_override_t asserted) -{ - /* Signal is active-low */ - gpio_set_level(GPIO_EC_BL_OVERRIDE, !asserted); -} - -static void mtk_lid_event(void) -{ - enum blacklight_override_t bl_override; - - /* Override the panel backlight enable signal from SoC, - * force the backlight off on lid close. - */ - bl_override = lid_is_open() ? - MTK_BACKLIGHT_CONTROL_BY_SOC : - MTK_BACKLIGHT_FORCE_OFF; - mtk_backlight_override(bl_override); - - /* Power task only cares about lid-open events */ - if (!lid_is_open()) - return; - - lid_opened = 1; - task_wake(TASK_ID_CHIPSET); -} -DECLARE_HOOK(HOOK_LID_CHANGE, mtk_lid_event, HOOK_PRIO_DEFAULT); - -enum power_state power_chipset_init(void) -{ - int init_power_state; - uint32_t reset_flags = system_get_reset_flags(); - - /* - * Force the AP shutdown unless we are doing SYSJUMP. Otherwise, - * the AP could stay in strange state. - */ - if (!(reset_flags & EC_RESET_FLAG_SYSJUMP)) { - CPRINTS("not sysjump; forcing AP shutdown"); - chipset_turn_off_power_rails(); - - /* - * The warm reset triggers AP into the recovery mode ( - * flash SPI from USB). - */ - chipset_reset(CHIPSET_RESET_UNKNOWN); - - init_power_state = POWER_G3; - } else { - /* In the SYSJUMP case, we check if the AP is on */ - if (is_power_good_asserted()) { - CPRINTS("SOC ON"); - /* - * Check and release PMIC power button signal, - * if it's deferred callback function is not triggered - * in RO before SYSJUMP. - */ - if (gpio_get_level(GPIO_PMIC_PWRON_H)) - set_pmic_pwron(0); - - init_power_state = POWER_S0; - if (is_suspend_asserted()) - enable_sleep(SLEEP_MASK_AP_RUN); - else - disable_sleep(SLEEP_MASK_AP_RUN); - } else { - CPRINTS("SOC OFF"); - init_power_state = POWER_G3; - enable_sleep(SLEEP_MASK_AP_RUN); - } - } - - /* Leave power off only if requested by reset flags */ - if (!(reset_flags & EC_RESET_FLAG_AP_OFF) && - !(reset_flags & EC_RESET_FLAG_SYSJUMP)) { - CPRINTS("reset_flag 0x%x", reset_flags); - auto_power_on = 1; - } - - /* - * Some batteries use clock stretching feature, which requires - * more time to be stable. See http://crosbug.com/p/28289 - */ - battery_wait_for_stable(); - - return init_power_state; -} - -/*****************************************************************************/ -/* Chipset interface */ - -static void chipset_turn_off_power_rails(void) -{ - /* Release the power on pin, if it was asserted */ - set_pmic_pwron(0); - - /* system power off */ - usleep(PMIC_POWER_OFF_DELAY); - set_system_power(0); -} - -void chipset_force_shutdown(enum chipset_shutdown_reason reason) -{ - CPRINTS("%s: %d", __func__, reason); - report_ap_reset(reason); - - chipset_turn_off_power_rails(); - - /* clean-up internal variable */ - power_request = POWER_REQ_NONE; -} - -/*****************************************************************************/ - -/** - * Power off the AP - */ -static void power_off(void) -{ - /* Check the power off status */ - if (!gpio_get_level(GPIO_SYSTEM_POWER_H)) - return; - - /* Call hooks before we drop power rails */ - hook_notify(HOOK_CHIPSET_SHUTDOWN); - /* switch off all rails */ - chipset_turn_off_power_rails(); - - /* Change SUSPEND_L pin to high-Z to reduce power draw. */ - gpio_set_flags(power_signal_list[MTK_SUSPEND_ASSERTED].gpio, - GPIO_INPUT); - - /* Change EC_INT to low */ - gpio_set_level(GPIO_EC_INT_L, 0); - - lid_opened = 0; - enable_sleep(SLEEP_MASK_AP_RUN); -#ifdef HAS_TASK_POWERLED - powerled_set_state(POWERLED_STATE_OFF); -#endif - CPRINTS("power shutdown complete"); - - /* Call hooks after we drop power rails */ - hook_notify(HOOK_CHIPSET_SHUTDOWN_COMPLETE); -} - -/** - * Check if there has been a power-on event - * - * This checks all power-on event signals and returns non-zero if any have been - * triggered (with debounce taken into account). - * - * @return non-zero if there has been a power-on event, 0 if not. - */ -static int check_for_power_on_event(void) -{ - int ap_off_flag; - - ap_off_flag = system_get_reset_flags() & EC_RESET_FLAG_AP_OFF; - system_clear_reset_flags(EC_RESET_FLAG_AP_OFF); - /* check if system is already ON */ - if (is_power_good_asserted()) { - if (ap_off_flag) { - CPRINTS("system is on, but EC_RESET_FLAG_AP_OFF is on"); - return POWER_ON_CANCEL; - } else { - CPRINTS("system is on, thus clear " "auto_power_on"); - /* no need to arrange another power on */ - auto_power_on = 0; - return POWER_ON_BY_IN_POWER_GOOD; - } - } else { - if (ap_off_flag) { - CPRINTS("EC_RESET_FLAG_AP_OFF is on"); - power_off(); - return POWER_ON_CANCEL; - } - - CPRINTS("POWER_GOOD is not asserted"); - } - - /* power on requested at EC startup for recovery */ - if (auto_power_on) { - auto_power_on = 0; - return POWER_ON_BY_AUTO_POWER_ON; - } - - /* Check lid open */ - if (lid_opened) { - lid_opened = 0; - return POWER_ON_BY_LID_OPEN; - } - - /* check for power button press */ - if (power_button_is_pressed()) - return POWER_ON_BY_POWER_BUTTON_PRESSED; - - if (power_request == POWER_REQ_ON) { - power_request = POWER_REQ_NONE; - return POWER_ON_BY_POWER_REQ_NONE; - } - - return POWER_OFF_CANCEL; -} - -void release_pmic_pwron_deferred(void) -{ - /* Release PMIC power button */ - set_pmic_pwron(0); -} -DECLARE_DEFERRED(release_pmic_pwron_deferred); - -/** - * Power on the AP - */ -static void power_on(void) -{ - uint64_t t; - - /* Set pull-up and enable interrupt */ - gpio_set_flags(power_signal_list[MTK_SUSPEND_ASSERTED].gpio, - GPIO_INPUT | GPIO_PULL_UP | GPIO_INT_BOTH); - - /* Make sure we de-assert and GPIO_PMIC_WARM_RESET_H pin. */ - set_warm_reset(0); - - /* - * Before we push PMIC power button, wait for the PMI RTC ready, which - * takes PMIC_RTC_STARTUP from the AC/battery is plugged in. - */ - t = get_time().val; - if (t < PMIC_RTC_STARTUP) { - uint32_t wait = PMIC_RTC_STARTUP - t; - - CPRINTS("wait for %dms for PMIC RTC start-up", wait / MSEC); - usleep(wait); - } - - /* - * When power_on() is called, we are at S5S3. Initialize components - * to ready state before AP is up. - */ - hook_notify(HOOK_CHIPSET_PRE_INIT); - - /* Push the power button */ - set_pmic_pwron(1); - hook_call_deferred(&release_pmic_pwron_deferred_data, - PMIC_PWRON_PRESS_TIME); - - /* enable interrupt */ - gpio_set_flags(GPIO_SUSPEND_L, INT_BOTH_PULL_UP); - -#ifdef BOARD_OAK - if (system_get_board_version() <= 3) - gpio_set_flags(GPIO_EC_INT_L, GPIO_OUTPUT | GPIO_OUT_HIGH); - else - gpio_set_flags(GPIO_EC_INT_L, GPIO_ODR_HIGH); -#else - gpio_set_flags(GPIO_EC_INT_L, GPIO_ODR_HIGH); -#endif - - disable_sleep(SLEEP_MASK_AP_RUN); -#ifdef HAS_TASK_POWERLED - powerled_set_state(POWERLED_STATE_ON); -#endif - /* Call hooks now that AP is running */ - hook_notify(HOOK_CHIPSET_STARTUP); - - CPRINTS("AP running ..."); -} - -void chipset_reset(enum chipset_reset_reason reason) -{ - CPRINTS("%s: %d", __func__, reason); - report_ap_reset(reason); - - set_warm_reset(1); - usleep(PMIC_WARM_RESET_H_HOLD_TIME); - /* deassert the reset signals */ - set_warm_reset(0); -} - -enum power_state power_handle_state(enum power_state state) -{ - int value; - static int boot_from_g3; - - switch (state) { - case POWER_G3: - boot_from_g3 = check_for_power_on_event(); - if (boot_from_g3) - return POWER_G3S5; - break; - - case POWER_G3S5: - return POWER_S5; - - case POWER_S5: - if (boot_from_g3) { - value = boot_from_g3; - boot_from_g3 = 0; - } else { - value = check_for_power_on_event(); - } - - if (value) { - CPRINTS("power on %d", value); - return POWER_S5S3; - } - return state; - - case POWER_S5S3: - power_on(); - if (power_wait_signals(IN_POWER_GOOD) == EC_SUCCESS) { - CPRINTS("POWER_GOOD seen"); - power_button_was_pressed = 0; - return POWER_S3; - } else { - CPRINTS("POWER_GOOD not seen in time"); - } - set_pmic_pwron(0); - return POWER_S5; - - case POWER_S3: - if (is_power_good_deasserted()) { - power_off(); - return POWER_S3S5; - } else if (is_suspend_deasserted()) - return POWER_S3S0; - return state; - - case POWER_S3S0: - disable_sleep(SLEEP_MASK_AP_RUN); -#ifdef HAS_TASK_POWERLED - powerled_set_state(POWERLED_STATE_ON); -#endif - hook_notify(HOOK_CHIPSET_RESUME); - return POWER_S0; - - case POWER_S0: - value = check_for_power_off_event(); - if (value) { - CPRINTS("power off %d", value); - power_off(); - return POWER_S0S3; - } else if (is_suspend_asserted()) - return POWER_S0S3; - return state; - - case POWER_S0S3: -#ifdef HAS_TASK_POWERLED - if (lid_is_open()) - powerled_set_state(POWERLED_STATE_SUSPEND); - else - powerled_set_state(POWERLED_STATE_OFF); -#endif - /* - * if the power button is pressing, we need cancel the long - * press timer, otherwise EC will crash. - */ - if (power_button_was_pressed) - timer_cancel(TASK_ID_CHIPSET); - - /* Call hooks here since we don't know it prior to AP suspend */ - hook_notify(HOOK_CHIPSET_SUSPEND); - enable_sleep(SLEEP_MASK_AP_RUN); - return POWER_S3; - - case POWER_S3S5: - power_button_wait_for_release(-1); - power_button_was_pressed = 0; - return POWER_S5; - - case POWER_S5G3: - return POWER_G3; - } - - return state; -} - -static void powerbtn_mtk_changed(void) -{ - task_wake(TASK_ID_CHIPSET); -} -DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, powerbtn_mtk_changed, HOOK_PRIO_DEFAULT); - -/*****************************************************************************/ -/* Console debug command */ - -static const char *power_req_name[POWER_REQ_COUNT] = { - "none", - "off", - "on", -}; - -/* Power states that we can report */ -enum power_state_t { - PSTATE_UNKNOWN, - PSTATE_OFF, - PSTATE_SUSPEND, - PSTATE_ON, - - PSTATE_COUNT, -}; - -static const char * const state_name[] = { - "unknown", - "off", - "suspend", - "on", -}; - -static int command_power(int argc, char **argv) -{ - int v; - - if (argc < 2) { - enum power_state_t state; - - state = PSTATE_UNKNOWN; - if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) - state = PSTATE_OFF; - if (chipset_in_state(CHIPSET_STATE_SUSPEND)) - state = PSTATE_SUSPEND; - if (chipset_in_state(CHIPSET_STATE_ON)) - state = PSTATE_ON; - ccprintf("%s\n", state_name[state]); - - return EC_SUCCESS; - } - - if (!parse_bool(argv[1], &v)) - return EC_ERROR_PARAM1; - - power_request = v ? POWER_REQ_ON : POWER_REQ_OFF; - ccprintf("Requesting power %s\n", power_req_name[power_request]); - task_wake(TASK_ID_CHIPSET); - - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(power, command_power, - "on/off", - "Turn AP power on/off"); |