diff options
Diffstat (limited to 'power/rk3288.c')
| -rw-r--r-- | power/rk3288.c | 577 |
1 files changed, 0 insertions, 577 deletions
diff --git a/power/rk3288.c b/power/rk3288.c deleted file mode 100644 index c647ab97b2..0000000000 --- a/power/rk3288.c +++ /dev/null @@ -1,577 +0,0 @@ -/* Copyright 2013 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. - */ - -/* - * Rockchip 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 9s later turns it off and leaves - * it off until pwron is released and pressed again - * - * When powered on: - * - Holding pwron for 10.2s powers off the AP - * - Pressing and releasing pwron within that 10.2s is ignored - * - If POWER_GOOD is dropped by the pmic, then we cut off the pmic source - * - If SUSPEND_L goes low, enter suspend mode. - * - */ - -#include "battery.h" -#include "charge_state.h" -#include "chipset.h" /* This module implements chipset functions too */ -#include "clock.h" -#include "common.h" -#include "console.h" -#include "gpio.h" -#include "hooks.h" -#include "lid_switch.h" -#include "keyboard_scan.h" -#include "power.h" -#include "power_button.h" -#include "power_led.h" -#include "system.h" -#include "task.h" -#include "timer.h" -#include "util.h" - -/* Console output macros */ -#define CPUTS(outstr) cputs(CC_CHIPSET, outstr) -#define CPRINTS(format, args...) cprints(CC_CHIPSET, format, ## args) - -/* masks for power signals */ -#define IN_POWER_GOOD POWER_SIGNAL_MASK(RK_POWER_GOOD) -#define IN_SUSPEND POWER_SIGNAL_MASK(RK_SUSPEND_ASSERTED) - -/* Long power key press to force shutdown */ -#define DELAY_FORCE_SHUTDOWN (8 * SECOND) - -/* - * 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 (8 * SECOND) - -/* - * The hold time for pulling down the PMIC_WARM_RESET_L pin so that - * the AP can entery the recovery mode (flash SPI flash from USB). - */ -#define PMIC_WARM_RESET_L_HOLD_TIME (4 * MSEC) - -/* - * Startup time for the PMIC source regulator. - */ -#define PMIC_SOURCE_STARTUP_TIME (50 * MSEC) - -/* - * Time before PMIC can be reset. - */ -#define PMIC_STARTUP_MS 300 - -/* 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; - - -/* Forward declaration */ -static void chipset_turn_off_power_rails(void); - - -/** - * Set the PMIC WARM RESET signal. - * - * @param asserted Resetting (=0) or idle (=1) - */ -static void set_pmic_warm_reset(int asserted) -{ - /* Signal is active-low */ - gpio_set_level(GPIO_PMIC_WARM_RESET_L, asserted ? 0 : 1); -} - - -/** - * Set the PMIC PWRON signal. - * - * @param asserted Assert (=1) or deassert (=0) the signal. - */ -static void set_pmic_pwron(int asserted) -{ - /* Signal is active-high */ - gpio_set_level(GPIO_PMIC_PWRON, asserted ? 1 : 0); -} - -/** - * Set the PMIC source to force shutdown the AP. - * - * @param asserted Assert (=1) or deassert (=0) the signal. - */ -static void set_pmic_source(int asserted) -{ - /* Signal is active-high */ - gpio_set_level(GPIO_PMIC_SOURCE_PWREN, asserted ? 1 : 0); -} - -/** - * 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; - int ret = 0; - - /* - * Check for power button press. - */ - if (power_button_is_pressed()) { - pressed = 1; - } else if (power_request == POWER_REQ_OFF) { - power_request = POWER_REQ_NONE; - return 4; /* return non-zero for shudown down */ - } - - 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 2; - } - } else if (power_button_was_pressed) { - CPRINTS("power off cancel"); - timer_cancel(TASK_ID_CHIPSET); - } - - /* POWER_GOOD released by AP : shutdown immediately */ - if (!power_has_signals(IN_POWER_GOOD)) { - if (power_button_was_pressed) - timer_cancel(TASK_ID_CHIPSET); - ret = 3; - } - - power_button_was_pressed = pressed; - - return ret; -} - -static void rockchip_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, rockchip_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 RK recovery mode ( - * flash SPI from USB). - */ - chipset_reset(CHIPSET_RESET_INIT); - - init_power_state = POWER_G3; - } else { - /* In the SYSJUMP case, we check if the AP is on */ - if (power_get_signals() & IN_POWER_GOOD) - init_power_state = POWER_S0; - else - 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; - } - - /* - * 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); - /* Close the pmic power source immediately */ - set_pmic_source(0); - - /* Keep AP and PMIC in reset the whole time */ - set_pmic_warm_reset(1); -} - -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; -} - -/*****************************************************************************/ - -/** - * 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 (power_get_signals() & IN_POWER_GOOD) { - if (ap_off_flag) { - CPRINTS( - "system is on, but " - "EC_RESET_FLAG_AP_OFF is on"); - return 0; - } else { - CPRINTS( - "system is on, thus clear " - "auto_power_on"); - /* no need to arrange another power on */ - auto_power_on = 0; - return 1; - } - } - - /* power on requested at EC startup for recovery */ - if (auto_power_on) { - auto_power_on = 0; - return 2; - } - - /* Check lid open */ - if (lid_opened) { - lid_opened = 0; - return 3; - } - - /* check for power button press */ - if (power_button_is_pressed()) - return 4; - - if (power_request == POWER_REQ_ON) { - power_request = POWER_REQ_NONE; - return 5; - } - - return 0; -} - -/** - * Power on the AP - */ -static void power_on(void) -{ - int i; - - set_pmic_source(1); - usleep(PMIC_SOURCE_STARTUP_TIME); - - set_pmic_pwron(1); - /* - * BUG Workaround(crosbug.com/p/31635): usleep hangs in task when using - * big delays. - */ - for (i = 0; i < PMIC_STARTUP_MS; i++) - usleep(1 * MSEC); - - set_pmic_warm_reset(0); -} - -/** - * Power off the AP - */ -static void power_off(void) -{ - unsigned int power_off_timeout = 100; /* ms */ - - /* Call hooks before we drop power rails */ - hook_notify(HOOK_CHIPSET_SHUTDOWN); - /* switch off all rails */ - chipset_turn_off_power_rails(); - /* Change SUSPEND_L and EC_INT pin to high-Z to reduce power draw. */ - gpio_set_flags(GPIO_SUSPEND_L, GPIO_INPUT); - gpio_set_flags(GPIO_EC_INT_L, GPIO_INPUT); - - /* Wait till we actually turn off to not mess up the state machine. */ - while (power_get_signals() & IN_POWER_GOOD) { - msleep(1); - power_off_timeout--; - ASSERT(power_off_timeout); - } - - lid_opened = 0; - enable_sleep(SLEEP_MASK_AP_RUN); - powerled_set_state(POWERLED_STATE_OFF); - - CPRINTS("power shutdown complete"); - - /* Call hooks after we drop power rails */ - hook_notify(HOOK_CHIPSET_SHUTDOWN_COMPLETE); -} - -void chipset_reset(enum chipset_reset_reason reason) -{ - CPRINTS("%s(%d)", __func__, reason); - report_ap_reset(reason); - - CPRINTS("assert GPIO_PMIC_WARM_RESET_L for %d ms", - PMIC_WARM_RESET_L_HOLD_TIME / MSEC); - set_pmic_warm_reset(1); - usleep(PMIC_WARM_RESET_L_HOLD_TIME); - set_pmic_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: - hook_notify(HOOK_CHIPSET_PRE_INIT); - - power_on(); - - disable_sleep(SLEEP_MASK_AP_RUN); - powerled_set_state(POWERLED_STATE_ON); - - if (power_wait_signals(IN_POWER_GOOD) == EC_SUCCESS) { - CPRINTS("POWER_GOOD seen"); - if (power_button_wait_for_release( - DELAY_SHUTDOWN_ON_POWER_HOLD) == - EC_SUCCESS) { - power_button_was_pressed = 0; - set_pmic_pwron(0); - - /* setup misc gpio for S3/S0 functionality */ - gpio_set_flags(GPIO_SUSPEND_L, GPIO_INPUT - | GPIO_INT_BOTH | GPIO_PULL_DOWN); - gpio_set_flags(GPIO_EC_INT_L, GPIO_OUTPUT - | GPIO_OUT_HIGH); - - /* Call hooks now that AP is running */ - hook_notify(HOOK_CHIPSET_STARTUP); - - return POWER_S3; - } else { - CPRINTS("long-press button, shutdown"); - power_off(); - /* - * Since the AP may be up already, return S0S3 - * state to go through the suspend hook. - */ - return POWER_S0S3; - } - } else { - CPRINTS("POWER_GOOD not seen in time"); - } - - chipset_turn_off_power_rails(); - return POWER_S5; - - case POWER_S3: - if (!(power_get_signals() & IN_POWER_GOOD)) - return POWER_S3S5; - else if (!(power_get_signals() & IN_SUSPEND)) - return POWER_S3S0; - return state; - - case POWER_S3S0: - powerled_set_state(POWERLED_STATE_ON); - 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 (power_get_signals() & IN_SUSPEND) - return POWER_S0S3; - return state; - - case POWER_S0S3: - if (lid_is_open()) - powerled_set_state(POWERLED_STATE_SUSPEND); - else - powerled_set_state(POWERLED_STATE_OFF); - /* Call hooks here since we don't know it prior to AP suspend */ - hook_notify(HOOK_CHIPSET_SUSPEND); - 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_rockchip_changed(void) -{ - task_wake(TASK_ID_CHIPSET); -} -DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, powerbtn_rockchip_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"); |