diff options
Diffstat (limited to 'power/qcom.c')
| -rw-r--r-- | power/qcom.c | 1169 |
1 files changed, 0 insertions, 1169 deletions
diff --git a/power/qcom.c b/power/qcom.c deleted file mode 100644 index ef9e329111..0000000000 --- a/power/qcom.c +++ /dev/null @@ -1,1169 +0,0 @@ -/* Copyright 2019 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. - */ - -/* - * SC7X80 SoC power sequencing module for Chrome EC - * - * This implements the following features: - * - * - Cold reset powers on the AP - * - * When powered off: - * - Press power button turns on the AP - * - Hold power button turns on the AP, and then 8s later turns it off and - * leaves it off until pwron is released and pressed again - * - Lid open turns on the AP - * - * When powered on: - * - Holding power button 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 - */ - -#include "charge_state.h" -#include "chipset.h" -#include "common.h" -#include "gpio.h" -#include "hooks.h" -#include "lid_switch.h" -#include "power.h" -#include "power/qcom.h" -#include "power_button.h" -#include "system.h" -#include "task.h" -#include "util.h" - -#define CPRINTS(format, args...) cprints(CC_CHIPSET, format, ## args) - -/* Power signal list. Must match order of enum power_signal. */ -const struct power_signal_info power_signal_list[] = { - [SC7X80_AP_RST_ASSERTED] = { - GPIO_AP_RST_L, - POWER_SIGNAL_ACTIVE_LOW | POWER_SIGNAL_DISABLE_AT_BOOT, - "AP_RST_ASSERTED", - }, - [SC7X80_PS_HOLD] = { - GPIO_PS_HOLD, - POWER_SIGNAL_ACTIVE_HIGH, - "PS_HOLD", - }, - [SC7X80_POWER_GOOD] = { - GPIO_POWER_GOOD, - POWER_SIGNAL_ACTIVE_HIGH, - "POWER_GOOD", - }, - [SC7X80_AP_SUSPEND] = { - GPIO_AP_SUSPEND, - POWER_SIGNAL_ACTIVE_HIGH, - "AP_SUSPEND", - }, -#ifdef CONFIG_CHIPSET_SC7180 - [SC7X80_WARM_RESET] = { - GPIO_WARM_RESET_L, - POWER_SIGNAL_ACTIVE_HIGH, - "WARM_RESET_L", - }, - [SC7X80_DEPRECATED_AP_RST_REQ] = { - GPIO_DEPRECATED_AP_RST_REQ, - POWER_SIGNAL_ACTIVE_HIGH, - "DEPRECATED_AP_RST_REQ", - }, -#endif /* defined(CONFIG_CHIPSET_SC7180) */ -}; -BUILD_ASSERT(ARRAY_SIZE(power_signal_list) == POWER_SIGNAL_COUNT); - -/* Masks for power signals */ -#define IN_POWER_GOOD POWER_SIGNAL_MASK(SC7X80_POWER_GOOD) -#define IN_AP_RST_ASSERTED POWER_SIGNAL_MASK(SC7X80_AP_RST_ASSERTED) -#define IN_SUSPEND POWER_SIGNAL_MASK(SC7X80_AP_SUSPEND) - - -/* Long power key press to force shutdown */ -#define DELAY_FORCE_SHUTDOWN (8 * SECOND) - -/* - * If the power button 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 (8 * SECOND) - -/* - * After trigger PMIC power sequence, how long it triggers AP to turn on - * or off. Observed that the worst case is ~150ms. Pick a safe vale. - */ -#define PMIC_POWER_AP_RESPONSE_TIMEOUT (350 * MSEC) - -/* - * After force off the switch cap, how long the PMIC/AP totally off. - * Observed that the worst case is 2s. Pick a safe vale. - */ -#define FORCE_OFF_RESPONSE_TIMEOUT (4 * SECOND) - -/* Wait for polling the AP on signal */ -#define PMIC_POWER_AP_WAIT (1 * MSEC) - -/* The length of an issued low pulse to the PMIC_RESIN_L signal */ -#define PMIC_RESIN_PULSE_LENGTH (20 * MSEC) - -/* The timeout of the check if the system can boot AP */ -#define CAN_BOOT_AP_CHECK_TIMEOUT (1500 * MSEC) - -/* Wait for polling if the system can boot AP */ -#define CAN_BOOT_AP_CHECK_WAIT (200 * MSEC) - -/* The timeout of the check if the switchcap outputs good voltage */ -#define SWITCHCAP_PG_CHECK_TIMEOUT (100 * MSEC) - -/* Wait for polling if the switchcap outputs good voltage */ -#define SWITCHCAP_PG_CHECK_WAIT (6 * MSEC) - -/* - * Delay between power-on the system and power-on the PMIC. - * Some latest PMIC firmware needs this delay longer, for doing a cold - * reboot. - * - * Measured on Herobrine IOB + Trogdor MLB, the delay takes ~200ms. Set - * it with margin. - */ -#define SYSTEM_POWER_ON_DELAY (300 * MSEC) - -/* - * Delay between the PMIC power drop and power-off the system. - * Qualcomm measured the entire POFF duration is around 70ms. Setting - * this delay to the same value as the above power-on sequence, which - * has much safer margin. - */ -#define PMIC_POWER_OFF_DELAY (150 * MSEC) - -/* The AP_RST_L transition count of a normal AP warm reset */ -#define EXPECTED_AP_RST_TRANSITIONS 3 - -/* - * The timeout of waiting the next AP_RST_L transition. We measured - * the interval between AP_RST_L transitions is 130ms ~ 150ms. Pick - * a safer value. - */ -#define AP_RST_TRANSITION_TIMEOUT (450 * 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_RESET, - - 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_OFF, - POWER_OFF_BY_POWER_REQ_RESET, - - POWER_OFF_EVENT_COUNT, -}; - -/** - * Return values for check_for_power_on_event(). - */ -enum power_on_event_t { - POWER_ON_CANCEL, - POWER_ON_BY_AUTO_POWER_ON, - POWER_ON_BY_LID_OPEN, - POWER_ON_BY_POWER_BUTTON_PRESSED, - POWER_ON_BY_POWER_REQ_ON, - POWER_ON_BY_POWER_REQ_RESET, - - POWER_ON_EVENT_COUNT, -}; - -#ifdef CONFIG_CHIPSET_RESET_HOOK -static int ap_rst_transitions; - -static void notify_chipset_reset(void) -{ - if (ap_rst_transitions != EXPECTED_AP_RST_TRANSITIONS) - CPRINTS("AP_RST_L transitions not expected: %d", - ap_rst_transitions); - - ap_rst_transitions = 0; - hook_notify(HOOK_CHIPSET_RESET); -} -DECLARE_DEFERRED(notify_chipset_reset); -#endif - -void chipset_ap_rst_interrupt(enum gpio_signal signal) -{ -#ifdef CONFIG_CHIPSET_RESET_HOOK - int delay; - - /* - * Only care the raising edge and AP in S0/S3. The single raising edge - * of AP power-on during S5S3 is ignored. - */ - if (gpio_get_level(GPIO_AP_RST_L) && - chipset_in_state(CHIPSET_STATE_ON | CHIPSET_STATE_SUSPEND)) { - ap_rst_transitions++; - if (ap_rst_transitions >= EXPECTED_AP_RST_TRANSITIONS) { - /* - * Reach the expected transition count. AP is booting - * up. Notify HOOK_CHIPSET_RESET immediately. - */ - delay = 0; - } else { - /* - * Should have more transitions of the AP_RST_L signal. - * In case the AP_RST_L signal is not toggled, still - * notify HOOK_CHIPSET_RESET. - */ - delay = AP_RST_TRANSITION_TIMEOUT; - } - hook_call_deferred(¬ify_chipset_reset_data, delay); - } -#endif - power_signal_interrupt(signal); -} - -/* Issue a request to initiate a reset sequence */ -static void request_cold_reset(void) -{ - power_request = POWER_REQ_RESET; - task_wake(TASK_ID_CHIPSET); -} - -#ifdef CONFIG_CHIPSET_SC7180 - -/* 1 if AP_RST_L and PS_HOLD is overdriven by EC */ -static char ap_rst_overdriven; - -void chipset_warm_reset_interrupt(enum gpio_signal signal) -{ - /* - * The warm_reset signal is pulled-up by a rail from PMIC. If the - * warm_reset drops, it means: - * * Servo or Cr50 holds the signal, or - * * its pull-up rail POWER_GOOD drops. - */ - if (!gpio_get_level(GPIO_WARM_RESET_L)) { - if (gpio_get_level(GPIO_POWER_GOOD)) { - /* - * Servo or Cr50 holds the WARM_RESET_L signal. - * - * Overdrive AP_RST_L to hold AP. Overdrive PS_HOLD to - * emulate AP being up to trick the PMIC into thinking - * there’s nothing weird going on. - */ - ap_rst_overdriven = 1; - gpio_set_flags(GPIO_PS_HOLD, GPIO_INT_BOTH | - GPIO_SEL_1P8V | GPIO_OUT_HIGH); - gpio_set_flags(GPIO_AP_RST_L, GPIO_INT_BOTH | - GPIO_SEL_1P8V | GPIO_OUT_LOW); - } - /* Ignore the else clause, the pull-up rail drops. */ - } else { - if (ap_rst_overdriven) { - /* - * Servo or Cr50 releases the WARM_RESET_L signal. - * - * Cold reset the PMIC, doing S0->S5->S0 transition, - * by issuing a request to initiate a reset sequence, - * to recover the system. The transition to S5 makes - * POWER_GOOD drop that triggers an interrupt to - * high-Z both AP_RST_L and PS_HOLD. - */ - CPRINTS("Long warm reset ended, " - "cold resetting to restore confidence."); - request_cold_reset(); - } - /* If not overdriven, just a normal power-up, do nothing. */ - } - power_signal_interrupt(signal); -} - -void chipset_power_good_interrupt(enum gpio_signal signal) -{ - if (!gpio_get_level(GPIO_POWER_GOOD) && ap_rst_overdriven) { - /* - * POWER_GOOD is the pull-up rail of WARM_RESET_L. - * When POWER_GOOD drops, high-Z both AP_RST_L and PS_HOLD - * to restore their states. - */ - gpio_set_flags(GPIO_AP_RST_L, GPIO_INT_BOTH | - GPIO_SEL_1P8V); - gpio_set_flags(GPIO_PS_HOLD, GPIO_INT_BOTH | - GPIO_SEL_1P8V); - ap_rst_overdriven = 0; - } - power_signal_interrupt(signal); -} -#endif /* defined(CONFIG_CHIPSET_SC7180) */ - -static void sc7x80_lid_event(void) -{ - /* 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, sc7x80_lid_event, HOOK_PRIO_DEFAULT); - -static void sc7x80_powerbtn_changed(void) -{ - task_wake(TASK_ID_CHIPSET); -} -DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, sc7x80_powerbtn_changed, - HOOK_PRIO_DEFAULT); - -/** - * Wait the switchcap GPIO0 PVC_PG signal asserted. - * - * When the output voltage is over the threshold PVC_PG_ADJ, - * the PVC_PG is asserted. - * - * PVG_PG_ADJ is configured to 3.0V. - * GPIO0 is configured as PVC_PG. - * - * @param enable 1 to wait the PMIC/AP on. - * 0 to wait the PMIC/AP off. - * - * @return EC_SUCCESS or error - */ -static int wait_switchcap_power_good(int enable) -{ - timestamp_t poll_deadline; - - poll_deadline = get_time(); - poll_deadline.val += SWITCHCAP_PG_CHECK_TIMEOUT; - while (enable != board_is_switchcap_power_good() && - get_time().val < poll_deadline.val) { - usleep(SWITCHCAP_PG_CHECK_WAIT); - } - - /* - * Check the timeout case. Just show a message. More check later - * will switch the power state. - */ - if (enable != board_is_switchcap_power_good()) { - if (enable) - CPRINTS("SWITCHCAP NO POWER GOOD!"); - else - CPRINTS("SWITCHCAP STILL POWER GOOD!"); - return EC_ERROR_UNKNOWN; - } - return EC_SUCCESS; -} - -/** - * Get the state of the system power signals. - * - * @return 1 if the system is powered, 0 if not - */ -static int is_system_powered(void) -{ - return board_is_switchcap_enabled(); -} - -/** - * Get the PMIC/AP power signal. - * - * We treat the PMIC chips and the AP as a whole here. Don't deal with - * the individual chip. - * - * @return 1 if the PMIC/AP is powered, 0 if not - */ -static int is_pmic_pwron(void) -{ - /* Use POWER_GOOD to indicate PMIC/AP is on/off */ - return gpio_get_level(GPIO_POWER_GOOD); -} - -/** - * Wait the PMIC/AP power-on state. - * - * @param enable 1 to wait the PMIC/AP on. - * 0 to wait the PMIC/AP off. - * @param timeout Number of microsecond of timeout. - * - * @return EC_SUCCESS or error - */ -static int wait_pmic_pwron(int enable, unsigned int timeout) -{ - timestamp_t poll_deadline; - - /* Check the AP power status */ - if (enable == is_pmic_pwron()) - return EC_SUCCESS; - - poll_deadline = get_time(); - poll_deadline.val += timeout; - while (enable != is_pmic_pwron() && - get_time().val < poll_deadline.val) { - usleep(PMIC_POWER_AP_WAIT); - } - - /* Check the timeout case */ - if (enable != is_pmic_pwron()) { - if (enable) - CPRINTS("AP POWER NOT READY!"); - else - CPRINTS("AP POWER STILL UP!"); - - return EC_ERROR_UNKNOWN; - } - return EC_SUCCESS; -} - -/** - * Set the state of the system power signals but without any check. - * - * The system power signals are the enable pins of SwitchCap. - * They control the power of the set of PMIC chips and the AP. - * - * @param enable 1 to enable or 0 to disable - */ -static void set_system_power_no_check(int enable) -{ - board_set_switchcap_power(enable); -} - -/** - * Set the state of the system power signals. - * - * The system power signals are the enable pins of SwitchCap. - * They control the power of the set of PMIC chips and the AP. - * - * @param enable 1 to enable or 0 to disable - * - * @return EC_SUCCESS or error - */ -static int set_system_power(int enable) -{ - int ret; - - CPRINTS("%s(%d)", __func__, enable); - set_system_power_no_check(enable); - - ret = wait_switchcap_power_good(enable); - - if (!enable) { - /* Ensure POWER_GOOD drop to low if it is a forced shutdown */ - ret |= wait_pmic_pwron(0, FORCE_OFF_RESPONSE_TIMEOUT); - } - usleep(SYSTEM_POWER_ON_DELAY); - - return ret; -} - -/** - * Set the PMIC/AP power-on state. - * - * It triggers the PMIC/AP power-on and power-off sequence. - * - * @param enable 1 to power the PMIC/AP on. - * 0 to power the PMIC/AP off. - * - * @return EC_SUCCESS or error - */ -static int set_pmic_pwron(int enable) -{ - int ret; - - CPRINTS("%s(%d)", __func__, enable); - - /* Check the PMIC/AP power state */ - if (enable == is_pmic_pwron()) - return EC_SUCCESS; - - if (!gpio_get_level(GPIO_PMIC_KPD_PWR_ODL)) { - CPRINTS("PMIC_KPD_PWR_ODL not pulled up by PMIC; cancel pwron"); - return EC_ERROR_UNKNOWN; - } - - /* - * Power-on sequence: - * 1. Hold down PMIC_KPD_PWR_ODL, which is a power-on trigger - * 2. PMIC supplies power to POWER_GOOD - * 3. Release PMIC_KPD_PWR_ODL - * - * Power-off sequence: - * 1. Hold down PMIC_KPD_PWR_ODL and PMIC_RESIN_L, which is a power-off - * trigger (requiring reprogramming PMIC registers to make - * PMIC_KPD_PWR_ODL + PMIC_RESIN_L as a shutdown trigger) - * 2. PMIC stops supplying power to POWER_GOOD (requiring - * reprogramming PMIC to set the stage-1 and stage-2 reset timers to - * 0 such that the pull down happens just after the deboucing time - * of the trigger, like 2ms) - * 3. Release PMIC_KPD_PWR_ODL and PMIC_RESIN_L - * - * If the above PMIC registers not programmed or programmed wrong, it - * falls back to the next functions, which cuts off the system power. - */ - - gpio_set_level(GPIO_PMIC_KPD_PWR_ODL, 0); - if (!enable) - gpio_set_level(GPIO_PMIC_RESIN_L, 0); - ret = wait_pmic_pwron(enable, PMIC_POWER_AP_RESPONSE_TIMEOUT); - gpio_set_level(GPIO_PMIC_KPD_PWR_ODL, 1); - if (!enable) - gpio_set_level(GPIO_PMIC_RESIN_L, 1); - - return ret; -} - -enum power_state power_chipset_init(void) -{ - int init_power_state; - uint32_t reset_flags = system_get_reset_flags(); - - /* Enable interrupts */ - if (IS_ENABLED(CONFIG_CHIPSET_SC7180)) { - gpio_enable_interrupt(GPIO_WARM_RESET_L); - gpio_enable_interrupt(GPIO_POWER_GOOD); - } - - /* - * 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 system shutdown"); - set_system_power_no_check(0); - init_power_state = POWER_G3; - } else { - /* In the SYSJUMP case, we check if the AP is on */ - if (power_get_signals() & IN_POWER_GOOD) { - CPRINTS("SOC ON"); - init_power_state = POWER_S0; - - /* - * Reenable the power signal AP_RST_L interrupt, which - * should be enabled during S5->S3 but sysjump makes - * it back to default, disabled. - */ - power_signal_enable_interrupt(GPIO_AP_RST_L); - - /* Disable idle task deep sleep when in S0 */ - disable_sleep(SLEEP_MASK_AP_RUN); - } else { - CPRINTS("SOC OFF"); - init_power_state = POWER_G3; - } - } - - /* Leave power off only if requested by reset flags */ - if (!(reset_flags & EC_RESET_FLAG_AP_OFF) && - !(reset_flags & EC_RESET_FLAG_SYSJUMP)) { - CPRINTS("auto_power_on set due to reset_flag 0x%x", - system_get_reset_flags()); - auto_power_on = 1; - } - - if (battery_is_present() == BP_YES) { - /* - * (crosbug.com/p/28289): Wait battery stable. - * Some batteries use clock stretching feature, which requires - * more time to be stable. - */ - battery_wait_for_stable(); - } - - return init_power_state; -} - -/*****************************************************************************/ - -/** - * Power off the AP - */ -static void power_off(void) -{ - /* Check PMIC POWER_GOOD */ - if (is_pmic_pwron()) { - /* Do a graceful way to shutdown PMIC/AP first */ - set_pmic_pwron(0); - usleep(PMIC_POWER_OFF_DELAY); - - /* - * Disable signal interrupts, as they are floating when - * switchcap off. - */ - power_signal_disable_interrupt(GPIO_AP_RST_L); - } - - /* Check the switchcap status */ - if (is_system_powered()) { - /* Force to switch off all rails */ - set_system_power(0); - } - - lid_opened = 0; -} - -/** - * Check if the power is enough to boot the AP. - */ -static int power_is_enough(void) -{ - timestamp_t poll_deadline; - - /* If powered by adapter only, wait a while for PD negoiation. */ - poll_deadline = get_time(); - poll_deadline.val += CAN_BOOT_AP_CHECK_TIMEOUT; - - /* - * Wait for PD negotiation. If a system with drained battery, don't - * waste the time and exit the loop. - */ - while (!system_can_boot_ap() && !charge_want_shutdown() && - get_time().val < poll_deadline.val) { - usleep(CAN_BOOT_AP_CHECK_WAIT); - } - - return system_can_boot_ap() && !charge_want_shutdown(); -} - -/** - * Power on the AP - * - * @return EC_SUCCESS or error - */ -static int power_on(void) -{ - int ret; - - ret = set_system_power(1); - if (ret != EC_SUCCESS) - return ret; - - /* Enable signal interrupts */ - power_signal_enable_interrupt(GPIO_AP_RST_L); - - ret = set_pmic_pwron(1); - if (ret != EC_SUCCESS) { - CPRINTS("POWER_GOOD not seen in time"); - return ret; - } - - CPRINTS("POWER_GOOD seen"); - return EC_SUCCESS; -} - -/** - * 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 uint8_t check_for_power_on_event(void) -{ - if (power_request == POWER_REQ_ON) { - power_request = POWER_REQ_NONE; - return POWER_ON_BY_POWER_REQ_ON; - } else if (power_request == POWER_REQ_RESET) { - power_request = POWER_REQ_NONE; - return POWER_ON_BY_POWER_REQ_RESET; - } - /* Clear invalid request */ - power_request = POWER_REQ_NONE; - - /* 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; - - return POWER_OFF_CANCEL; -} - -/** - * 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 uint8_t check_for_power_off_event(void) -{ - timestamp_t now; - int pressed = 0; - - if (power_request == POWER_REQ_OFF) { - power_request = POWER_REQ_NONE; - return POWER_OFF_BY_POWER_REQ_OFF; - } else if (power_request == POWER_REQ_RESET) { - /* - * The power_request flag will be cleared later - * in check_for_power_on_event() in S5. - */ - return POWER_OFF_BY_POWER_REQ_RESET; - } - /* Clear invalid request */ - power_request = POWER_REQ_NONE; - - /* - * Check for power button press. - */ - if (power_button_is_pressed()) - pressed = POWER_OFF_BY_POWER_BUTTON_PRESSED; - - 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 immediately */ - if (!power_has_signals(IN_POWER_GOOD)) { - CPRINTS("POWER_GOOD is lost"); - return POWER_OFF_BY_POWER_GOOD_LOST; - } - - return POWER_OFF_CANCEL; -} - -/** - * Cancel the power button timer. - * - * The timer was previously created in the check_for_power_off_event(), - * which waited for the power button long press. Should cancel the timer - * during the power state transition; otherwise, EC will crash. - */ -static inline void cancel_power_button_timer(void) -{ - if (power_button_was_pressed) - timer_cancel(TASK_ID_CHIPSET); -} - -/*****************************************************************************/ -/* Chipset interface */ - -void chipset_force_shutdown(enum chipset_shutdown_reason reason) -{ - CPRINTS("%s(%d)", __func__, reason); - report_ap_reset(reason); - - /* Issue a request to initiate a power-off sequence */ - power_request = POWER_REQ_OFF; - task_wake(TASK_ID_CHIPSET); -} - -void chipset_reset(enum chipset_reset_reason reason) -{ - int rv; - - CPRINTS("%s(%d)", __func__, reason); - report_ap_reset(reason); - - /* - * Warm reset sequence: - * 1. Issue a low pulse to PMIC_RESIN_L, which triggers PMIC - * to do a warm reset (requiring reprogramming PMIC registers - * to make PMIC_RESIN_L as a warm reset trigger). - * 2. PMIC then issues a low pulse to AP_RST_L to reset AP. - * EC monitors the signal to see any low pulse. - * 2.1. If a low pulse found, done. - * 2.2. If a low pulse not found (the above PMIC registers - * not programmed or programmed wrong), issue a request - * to initiate a cold reset power sequence. - */ - - gpio_set_level(GPIO_PMIC_RESIN_L, 0); - usleep(PMIC_RESIN_PULSE_LENGTH); - gpio_set_level(GPIO_PMIC_RESIN_L, 1); - - rv = power_wait_signals_timeout(IN_AP_RST_ASSERTED, - PMIC_POWER_AP_RESPONSE_TIMEOUT); - /* Exception case: PMIC not work as expected, request a cold reset */ - if (rv != EC_SUCCESS) { - CPRINTS("AP refuses to warm reset. Cold resetting."); - request_cold_reset(); - } -} - -/* - * Flag to fake the suspend signal to 1 or 0, or -1 means not fake it. - * - * TODO(waihong): Remove this flag and debug command when the AP_SUSPEND - * signal is working. - */ -static int fake_suspend = -1; - -static int command_fake_suspend(int argc, char **argv) -{ - int v; - - if (argc < 2) { - ccprintf("fake_suspend: %s\n", - fake_suspend == -1 ? "reset" - : (fake_suspend ? "on" : "off")); - return EC_SUCCESS; - } - - if (!strcasecmp(argv[1], "reset")) - fake_suspend = -1; - else if (parse_bool(argv[1], &v)) - fake_suspend = v; - else - return EC_ERROR_PARAM1; - - task_wake(TASK_ID_CHIPSET); - - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(fakesuspend, command_fake_suspend, - "on/off/reset", - "Fake the AP_SUSPEND signal"); - -/* Get system sleep state through GPIOs */ -static inline int chipset_get_sleep_signal(void) -{ - if (fake_suspend == -1) - return (power_get_signals() & IN_SUSPEND) == IN_SUSPEND; - else - return fake_suspend; -} - -static void suspend_hang_detected(void) -{ - CPRINTS("Warning: Detected sleep hang! Waking host up!"); - host_set_single_event(EC_HOST_EVENT_HANG_DETECT); -} - -static void power_reset_host_sleep_state(void) -{ - power_set_host_sleep_state(HOST_SLEEP_EVENT_DEFAULT_RESET); - sleep_reset_tracking(); - power_chipset_handle_host_sleep_event(HOST_SLEEP_EVENT_DEFAULT_RESET, - NULL); -} - -static void handle_chipset_reset(void) -{ - if (chipset_in_state(CHIPSET_STATE_SUSPEND)) { - CPRINTS("Chipset reset: exit s3"); - power_reset_host_sleep_state(); - task_wake(TASK_ID_CHIPSET); - } -} -DECLARE_HOOK(HOOK_CHIPSET_RESET, handle_chipset_reset, HOOK_PRIO_FIRST); - -__override void power_chipset_handle_host_sleep_event( - enum host_sleep_event state, - struct host_sleep_event_context *ctx) -{ - CPRINTS("Handle sleep: %d", state); - - if (state == HOST_SLEEP_EVENT_S3_SUSPEND) { - /* - * Indicate to power state machine that a new host event for - * S3 suspend has been received and so chipset suspend - * notification needs to be sent to listeners. - */ - sleep_set_notify(SLEEP_NOTIFY_SUSPEND); - sleep_start_suspend(ctx, suspend_hang_detected); - power_signal_enable_interrupt(GPIO_AP_SUSPEND); - - } else if (state == HOST_SLEEP_EVENT_S3_RESUME) { - /* - * Wake up chipset task and indicate to power state machine that - * listeners need to be notified of chipset resume. - */ - sleep_set_notify(SLEEP_NOTIFY_RESUME); - task_wake(TASK_ID_CHIPSET); - power_signal_disable_interrupt(GPIO_AP_SUSPEND); - sleep_complete_resume(ctx); - - } else if (state == HOST_SLEEP_EVENT_DEFAULT_RESET) { - power_signal_disable_interrupt(GPIO_AP_SUSPEND); - } -} - -/** - * Power handler for steady states - * - * @param state Current power state - * @return Updated power state - */ -enum power_state power_handle_state(enum power_state state) -{ - static uint8_t boot_from_off, shutdown_from_on; - - switch (state) { - case POWER_G3: - boot_from_off = check_for_power_on_event(); - if (boot_from_off) - return POWER_G3S5; - break; - - case POWER_G3S5: - return POWER_S5; - - case POWER_S5: - if (!boot_from_off) - boot_from_off = check_for_power_on_event(); - - if (boot_from_off) { - CPRINTS("power on %d", boot_from_off); - return POWER_S5S3; - } - break; - - case POWER_S5S3: - /* - * Wait for power button release before actually boot AP. - * It may be a long-hold power button with volume buttons - * to trigger the recovery button. We don't want AP up - * during the long-hold. - */ - power_button_wait_for_release(-1); - - /* If no enough power, return back to S5. */ - if (!power_is_enough()) { - boot_from_off = 0; - return POWER_S5; - } - - /* Initialize components to ready state before AP is up. */ - hook_notify(HOOK_CHIPSET_PRE_INIT); - - if (power_on() != EC_SUCCESS) { - power_off(); - boot_from_off = 0; - return POWER_S5; - } - CPRINTS("AP running ..."); - - /* Call hooks now that AP is running */ - hook_notify(HOOK_CHIPSET_STARTUP); - - /* - * Clearing the sleep failure detection tracking on the path - * to S0 to handle any reset conditions. - */ - power_reset_host_sleep_state(); - return POWER_S3; - - case POWER_S3: - if (!shutdown_from_on) - shutdown_from_on = check_for_power_off_event(); - - if (shutdown_from_on) { - CPRINTS("power off %d", shutdown_from_on); - return POWER_S3S5; - } - - /* - * AP has woken up and it deasserts the suspend signal; - * go to S0. - * - * In S0, it will wait for a host event and then trigger the - * RESUME hook. - */ - if (!chipset_get_sleep_signal()) - return POWER_S3S0; - break; - - case POWER_S3S0: - cancel_power_button_timer(); - -#ifdef CONFIG_CHIPSET_RESUME_INIT_HOOK - /* - * Notify the RESUME_INIT hooks, i.e. enabling SPI driver - * to receive host commands/events. - * - * If boot from an off state, notify the RESUME hooks too; - * otherwise (resume from S3), the normal RESUME hooks will - * be notified later, after receive a host resume event. - */ - hook_notify(HOOK_CHIPSET_RESUME_INIT); - if (boot_from_off) - hook_notify(HOOK_CHIPSET_RESUME); -#else - hook_notify(HOOK_CHIPSET_RESUME); -#endif - sleep_resume_transition(); - - boot_from_off = 0; - disable_sleep(SLEEP_MASK_AP_RUN); - return POWER_S0; - - case POWER_S0: - shutdown_from_on = check_for_power_off_event(); - if (shutdown_from_on) { - return POWER_S0S3; - } else if (power_get_host_sleep_state() - == HOST_SLEEP_EVENT_S3_SUSPEND && - chipset_get_sleep_signal()) { - return POWER_S0S3; - } - /* When receive the host event, trigger the RESUME hook. */ - sleep_notify_transition(SLEEP_NOTIFY_RESUME, - HOOK_CHIPSET_RESUME); - break; - - case POWER_S0S3: - cancel_power_button_timer(); - - /* - * Call SUSPEND hooks only if we haven't notified listeners of - * S3 suspend. - */ - sleep_notify_transition(SLEEP_NOTIFY_SUSPEND, - HOOK_CHIPSET_SUSPEND); -#ifdef CONFIG_CHIPSET_RESUME_INIT_HOOK - /* - * Pair with the HOOK_CHIPSET_RESUME_INIT, i.e. disabling SPI - * driver, by notifying the SUSPEND_COMPLETE hooks. - * - * If shutdown from an on state, notify the SUSPEND hooks too; - * otherwise (suspend from S0), the normal SUSPEND hooks have - * been notified in the above sleep_notify_transition() call. - */ - if (shutdown_from_on) - hook_notify(HOOK_CHIPSET_SUSPEND); - hook_notify(HOOK_CHIPSET_SUSPEND_COMPLETE); -#else - hook_notify(HOOK_CHIPSET_SUSPEND); -#endif - sleep_suspend_transition(); - - enable_sleep(SLEEP_MASK_AP_RUN); - return POWER_S3; - - case POWER_S3S5: - cancel_power_button_timer(); - - /* Call hooks before we drop power rails */ - hook_notify(HOOK_CHIPSET_SHUTDOWN); - - power_off(); - CPRINTS("power shutdown complete"); - - /* Call hooks after we drop power rails */ - hook_notify(HOOK_CHIPSET_SHUTDOWN_COMPLETE); - - shutdown_from_on = 0; - - /* - * Wait forever for the release of the power button; otherwise, - * this power button press will then trigger a power-on in S5. - */ - power_button_wait_for_release(-1); - power_button_was_pressed = 0; - return POWER_S5; - - case POWER_S5G3: - return POWER_G3; - } - - return state; -} - -/*****************************************************************************/ -/* 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_ON, - PSTATE_COUNT, -}; - -static const char * const state_name[] = { - "unknown", - "off", - "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_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"); |