summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorWai-Hong Tam <waihong@google.com>2018-03-15 09:57:21 -0700
committerchrome-bot <chrome-bot@chromium.org>2018-05-04 03:02:16 -0700
commitf7aec0ceb52f3e40460bfe272040b7079ab56834 (patch)
treedcdde75a233c7c5ec663600402ddc1cd3d38e9f6
parent52848179d20e1abd98ad5c3feab2ee319ddbffcc (diff)
downloadchrome-ec-f7aec0ceb52f3e40460bfe272040b7079ab56834.tar.gz
cheza: Add SDM845 power sequence for rev-0 board
This is the power sequence for rev-0 board. Confirmed the behavior of reprogramming the PMIC registers to enable the instant reset and shutdown. BRANCH=none BUG=b:74395451 TEST=make buildall -j TEST=Tried the following cases: * Cold reset: $ dut-control cold_reset:on sleep:0.2 cold_reset:off Result: G3 -> S0 * Long power press to shutdown: $ dut-control pwr_button:press sleep:8.2 pwr_button:release Result: S0 -> S5 -> G3 * Long power press to power-on but then shutdown: $ dut-control pwr_button:press sleep:8.2 pwr_button:release Result: G3 -> S0 -> S5 -> G3 * Short power press to power-on: $ dut-control pwr_button:press sleep:0.2 pwr_button:release Result: G3 -> S0 * Console command: apreset Result: S0 -> S5 -> S0 * Console command: power off Result: S0 -> S5 -> G3 * Console command: power on Result: G3 -> S0 * Console command: apshutdown Result: S0 -> S5 -> G3 * Lid open to power-on: $ dut-control lid_open:no sleep:0.2 lid_open:yes Result: G3 -> S0 Change-Id: Ia9d44b1dccac66b5b580c08c6c1697ef5989b923 Signed-off-by: Wai-Hong Tam <waihong@google.com> Signed-off-by: Alexandru M Stan <amstan@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/969702
-rw-r--r--board/cheza/board.c21
-rw-r--r--board/cheza/board.h10
-rw-r--r--board/cheza/ec.tasklist1
-rw-r--r--board/cheza/gpio.inc5
-rw-r--r--include/config.h1
-rw-r--r--power/build.mk1
-rw-r--r--power/sdm845.c640
7 files changed, 677 insertions, 2 deletions
diff --git a/board/cheza/board.c b/board/cheza/board.c
index cd9e334216..f2c53de96b 100644
--- a/board/cheza/board.c
+++ b/board/cheza/board.c
@@ -13,6 +13,7 @@
#include "i2c.h"
#include "lid_switch.h"
#include "pi3usb9281.h"
+#include "power.h"
#include "power_button.h"
#include "switch.h"
@@ -33,6 +34,26 @@ const int hibernate_wake_pins_used = ARRAY_SIZE(hibernate_wake_pins);
const struct adc_t adc_channels[] = {};
+/* Power signal list. Must match order of enum power_signal. */
+/*
+ * PMIC pulls up the AP_RST_L signal to power-on AP. Once AP is up, it then
+ * pulls up the PS_HOLD signal.
+ *
+ * +--> GPIO_AP_RST_L >--+
+ * PMIC AP
+ * +--< GPIO_PS_HOLD <---+
+ *
+ * When AP initiates shutdown, it pulls down the PS_HOLD signal to notify
+ * PMIC. PMIC then pulls down the AP_RST_L.
+ *
+ * TODO(b/78455067): By far, we use the AP_RST_L signal to indicate AP in a
+ * good state. Address the issue of AP-initiated warm reset.
+ */
+const struct power_signal_info power_signal_list[] = {
+ {GPIO_AP_RST_L, POWER_SIGNAL_ACTIVE_HIGH, "POWER_GOOD"},
+};
+BUILD_ASSERT(ARRAY_SIZE(power_signal_list) == POWER_SIGNAL_COUNT);
+
/* I2C port map */
const struct i2c_port_t i2c_ports[] = {
{"power", I2C_PORT_POWER, 400, GPIO_I2C0_SCL, GPIO_I2C0_SDA},
diff --git a/board/cheza/board.h b/board/cheza/board.h
index d4c0be0c79..19dac3bad7 100644
--- a/board/cheza/board.h
+++ b/board/cheza/board.h
@@ -36,6 +36,10 @@
#define CONFIG_LID_SWITCH
#define CONFIG_EXTPOWER_GPIO
+#define CONFIG_CHIPSET_SDM845
+#define CONFIG_CHIPSET_RESET_HOOK
+#define CONFIG_POWER_COMMON
+
/* NPCX Features */
#define CONFIG_HIBERNATE_PSL
@@ -53,6 +57,12 @@
#include "gpio_signal.h"
#include "registers.h"
+enum power_signal {
+ SDM845_POWER_GOOD = 0,
+ /* Number of power signals */
+ POWER_SIGNAL_COUNT
+};
+
enum adc_channel {
ADC_VBUS = -1,
ADC_CH_COUNT
diff --git a/board/cheza/ec.tasklist b/board/cheza/ec.tasklist
index 2e6fdac6e2..fa12c7f617 100644
--- a/board/cheza/ec.tasklist
+++ b/board/cheza/ec.tasklist
@@ -22,5 +22,6 @@
#define CONFIG_TASK_LIST \
TASK_ALWAYS(HOOKS, hook_task, NULL, LARGER_TASK_STACK_SIZE) \
+ TASK_NOTEST(CHIPSET, chipset_task, NULL, LARGER_TASK_STACK_SIZE) \
TASK_ALWAYS(HOSTCMD, host_command_task, NULL, LARGER_TASK_STACK_SIZE) \
TASK_ALWAYS(CONSOLE, console_task, NULL, LARGER_TASK_STACK_SIZE)
diff --git a/board/cheza/gpio.inc b/board/cheza/gpio.inc
index b824d6c7c4..8c89555bbc 100644
--- a/board/cheza/gpio.inc
+++ b/board/cheza/gpio.inc
@@ -13,6 +13,8 @@ GPIO_INT(VOLUME_DOWN_L, PIN(7, 0), GPIO_INT_BOTH | GPIO_PULL_UP, button_inte
GPIO_INT(VOLUME_UP_L, PIN(1, 1), GPIO_INT_BOTH | GPIO_PULL_UP, button_interrupt) /* EC_VOLUP_BTN_ODL */
GPIO_INT(WP_L, PIN(A, 1), GPIO_INT_BOTH, switch_interrupt) /* EC_WP_ODL */
GPIO_INT(LID_OPEN, PIN(D, 2), GPIO_INT_BOTH, lid_interrupt) /* LID_OPEN_EC */
+/* AP_RST_L is used for PMIC and AP negotiation. Don't change its state. */
+GPIO_INT(AP_RST_L, PIN(C, 1), GPIO_INT_BOTH, power_signal_interrupt)
/*
* Should always make it low, to prevent AP unexpected up.
@@ -21,8 +23,7 @@ GPIO_INT(LID_OPEN, PIN(D, 2), GPIO_INT_BOTH, lid_interrupt) /* LID_OPE
GPIO(AC_PRESENT, PIN(0, 0), GPIO_OUT_LOW) /* ACOK_OD: PMIC power-on trigger PON_1 */
GPIO(EC_SELF_RST, PIN(E, 0), GPIO_OUT_LOW) /* Self-reset EC */
GPIO(SYS_RST_L, PIN(0, 2), GPIO_ODR_HIGH) /* PMIC reset trigger */
-/* AP_RST_L and PS_HOLD are used for PMIC and AP negotiation. Don't change their states. */
-GPIO(AP_RST_L, PIN(C, 1), GPIO_INPUT) /* AP reset trigger, controlled by PMIC only */
+/* PS_HOLD is used for PMIC and AP negotiation. Don't change its state. */
GPIO(PS_HOLD, PIN(D, 4), GPIO_INPUT) /* Indicate when AP triggers reset/shutdown */
GPIO(ENTERING_RW, PIN(E, 1), GPIO_OUT_LOW) /* EC_ENTERING_RW: Indicate when EC is entering RW code */
GPIO(CCD_MODE_ODL, PIN(E, 3), GPIO_INPUT) /* Case Closed Debug Mode */
diff --git a/include/config.h b/include/config.h
index 9d8d2de1cc..4c343acbb0 100644
--- a/include/config.h
+++ b/include/config.h
@@ -730,6 +730,7 @@
/* TODO: Rename below config to CONFIG_CHIPSET_RK32XX */
#undef CONFIG_CHIPSET_ROCKCHIP /* Rockchip rk32xx */
#undef CONFIG_CHIPSET_SKYLAKE /* Intel Skylake (x86) */
+#undef CONFIG_CHIPSET_SDM845 /* Qualcomm SDM845 */
#undef CONFIG_CHIPSET_STONEY /* AMD Stoney (x86)*/
/* Shared chipset support; automatically gets defined below. */
diff --git a/power/build.mk b/power/build.mk
index e24ea80cee..6eb5d2d454 100644
--- a/power/build.mk
+++ b/power/build.mk
@@ -13,6 +13,7 @@ power-$(CONFIG_CHIPSET_ECDRIVEN)+=ec_driven.o
power-$(CONFIG_CHIPSET_MEDIATEK)+=mediatek.o
power-$(CONFIG_CHIPSET_RK3399)+=rk3399.o
power-$(CONFIG_CHIPSET_ROCKCHIP)+=rockchip.o
+power-$(CONFIG_CHIPSET_SDM845)+=sdm845.o
power-$(CONFIG_CHIPSET_SKYLAKE)+=skylake.o intel_x86.o
power-$(CONFIG_CHIPSET_STONEY)+=stoney.o
power-$(CONFIG_POWER_COMMON)+=common.o
diff --git a/power/sdm845.c b/power/sdm845.c
new file mode 100644
index 0000000000..4e96c1385e
--- /dev/null
+++ b/power/sdm845.c
@@ -0,0 +1,640 @@
+/* Copyright 2018 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.
+ */
+
+/*
+ * SDM845 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 "chipset.h"
+#include "common.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "lid_switch.h"
+#include "power.h"
+#include "power_button.h"
+#include "system.h"
+#include "task.h"
+#include "util.h"
+
+#define CPRINTS(format, args...) cprints(CC_CHIPSET, format, ## args)
+
+/* Masks for power signals */
+#define IN_POWER_GOOD POWER_SIGNAL_MASK(SDM845_POWER_GOOD)
+
+/* 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-on, how long it triggers AP to turn on.
+ * Obversed that the worst case is ~150ms. Pick a safe vale.
+ */
+#define PMIC_POWER_AP_RESPONSE_TIMEOUT (350 * MSEC)
+
+/* Wait for polling the AP on signal */
+#define PMIC_POWER_AP_WAIT (1 * MSEC)
+
+/* Delay between power-on the system and power-on the PMIC */
+#define SYSTEM_POWER_ON_DELAY (10 * MSEC)
+
+/* Delay between power-off the system and all things (PMIC/AP) expected off */
+#define SYSTEM_POWER_OFF_DELAY (350 * 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,
+};
+
+static void sdm845_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, sdm845_lid_event, HOOK_PRIO_DEFAULT);
+
+static void powerbtn_sdm845_changed(void)
+{
+ task_wake(TASK_ID_CHIPSET);
+}
+DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, powerbtn_sdm845_changed,
+ HOOK_PRIO_DEFAULT);
+
+/**
+ * Set the state of the system power signals.
+ *
+ * The system power signals are the enable pins of SwitchCap and VBOB.
+ * 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(int enable)
+{
+ CPRINTS("set_system_power(%d)", enable);
+ gpio_set_level(GPIO_SWITCHCAP_ON_L, enable);
+ gpio_set_level(GPIO_VBOB_EN, enable);
+}
+
+/**
+ * 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 gpio_get_level(GPIO_SWITCHCAP_ON_L);
+}
+
+/**
+ * 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 PS_HOLD to indicate PMIC/AP is on/off */
+ return gpio_get_level(GPIO_PS_HOLD);
+}
+
+/**
+ * Wait the PMIC/AP power-on state.
+ *
+ * @param enable 1 to wait the PMIC/AP on.
+ 0 to wait the PMIC/AP off.
+ */
+static void wait_pmic_pwron(int enable)
+{
+ timestamp_t poll_deadline;
+
+ /* Check the AP power status */
+ if (enable == is_pmic_pwron())
+ return;
+
+ poll_deadline = get_time();
+ poll_deadline.val += PMIC_POWER_AP_RESPONSE_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!");
+ }
+}
+
+/**
+ * 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.
+ */
+static void set_pmic_pwron(int enable)
+{
+ CPRINTS("set_pmic_pwron(%d)", enable);
+
+ /* Check the PMIC/AP power state */
+ if (enable == is_pmic_pwron())
+ return;
+
+ /*
+ * Power-on sequence:
+ * 1. Hold down PMIC_KPD_PWR_ODL, which is a power-on trigger
+ * 2. PM845 pulls up AP_RST_L signal to power-on SDM845
+ * 3. SDM845 pulls up PS_HOLD signal
+ * 4. Wait for PS_HOLD up
+ * 5. Release PMIC_KPD_PWR_ODL
+ *
+ * Power-off sequence:
+ * 1. Hold down PMIC_KPD_PWR_ODL and SYS_RST_L, which is a power-off
+ * trigger (requiring reprogramming PMIC registers to make
+ * PMIC_KPD_PWR_ODL + SYS_RST_L as a shutdown trigger)
+ * 2. PM845 pulls down AP_RST_L signal to power-off SDM845 (requreing
+ * 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. SDM845 pulls down PS_HOLD signal
+ * 4. Wait for PS_HOLD down
+ * 5. Release PMIC_KPD_PWR_ODL and SYS_RST_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_SYS_RST_L, 0);
+ wait_pmic_pwron(enable);
+ gpio_set_level(GPIO_PMIC_KPD_PWR_ODL, 1);
+ if (!enable)
+ gpio_set_level(GPIO_SYS_RST_L, 1);
+}
+
+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 & RESET_FLAG_SYSJUMP)) {
+ CPRINTS("not sysjump; forcing system shutdown");
+ set_system_power(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;
+ } else {
+ CPRINTS("SOC OFF");
+ init_power_state = POWER_G3;
+ }
+ }
+
+ /* Leave power off only if requested by reset flags */
+ if (!(reset_flags & RESET_FLAG_AP_OFF) &&
+ !(reset_flags & RESET_FLAG_SYSJUMP)) {
+ CPRINTS("auto_power_on set due to reset_flag 0x%x",
+ system_get_reset_flags());
+ auto_power_on = 1;
+ }
+
+ /*
+ * TODO(crosbug.com/p/28289): Wait battery stable.
+ * Some batteries use clock stretching feature, which requires
+ * more time to be stable.
+ */
+
+ return init_power_state;
+}
+
+/*****************************************************************************/
+
+/**
+ * Power off the AP
+ */
+static void power_off(void)
+{
+ /* Check the power off status */
+ if (!is_system_powered())
+ return;
+
+ /* Call hooks before we drop power rails */
+ hook_notify(HOOK_CHIPSET_SHUTDOWN);
+
+ /* Do a graceful way to shutdown PMIC/AP first */
+ set_pmic_pwron(0);
+
+ /* Force to switch off all rails */
+ set_system_power(0);
+
+ /* Wait longer to ensure the PMIC/AP totally off */
+ usleep(SYSTEM_POWER_OFF_DELAY);
+
+ lid_opened = 0;
+ enable_sleep(SLEEP_MASK_AP_RUN);
+ CPRINTS("power shutdown complete");
+}
+
+/**
+ * Power on the AP
+ */
+static void power_on(void)
+{
+ /*
+ * When power_on() is called, we are at S5S3. Initialize components
+ * to ready state before AP is up.
+ */
+ hook_notify(HOOK_CHIPSET_PRE_INIT);
+
+ set_system_power(1);
+ usleep(SYSTEM_POWER_ON_DELAY);
+ set_pmic_pwron(1);
+
+ disable_sleep(SLEEP_MASK_AP_RUN);
+
+ CPRINTS("AP running ...");
+}
+
+/**
+ * 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() & RESET_FLAG_AP_OFF;
+ system_clear_reset_flags(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 RESET_FLAG_AP_OFF is on");
+ return POWER_ON_CANCEL;
+ }
+ 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;
+ }
+ if (ap_off_flag) {
+ CPRINTS("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;
+}
+
+/**
+ * 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 immediately */
+ if (!power_has_signals(IN_POWER_GOOD)) {
+ 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;
+}
+
+/*****************************************************************************/
+/* Chipset interface */
+
+void chipset_force_shutdown(void)
+{
+ CPRINTS("EC triggered shutdown");
+ power_off();
+
+ /* Clean-up internal variable */
+ power_request = POWER_REQ_NONE;
+}
+
+void chipset_reset(void)
+{
+ /*
+ * Before we can reprogram the PMIC to make the PMIC RESIN_N pin as
+ * reset pin and zero-latency. We do cold reset instead.
+ */
+ CPRINTS("EC triggered cold reboot");
+ power_off();
+
+ /* Issue a request to initiate a power-on sequence */
+ power_request = POWER_REQ_ON;
+ task_wake(TASK_ID_CHIPSET);
+}
+
+/**
+ * Power handler for steady states
+ *
+ * @param state Current power state
+ * @return Updated power state
+ */
+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;
+ }
+ break;
+
+ case POWER_S5S3:
+ power_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;
+
+ /* Call hooks now that AP is running */
+ hook_notify(HOOK_CHIPSET_STARTUP);
+
+ return POWER_S3;
+ }
+ 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;
+ }
+ CPRINTS("POWER_GOOD not seen in time");
+ set_system_power(0);
+ return POWER_S5;
+
+ case POWER_S3:
+ if (!(power_get_signals() & IN_POWER_GOOD))
+ return POWER_S3S5;
+
+ /* Go to S3S0 directly, as don't know if it is in suspend */
+ return POWER_S3S0;
+
+ case POWER_S3S0:
+ 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;
+ }
+ break;
+
+ case POWER_S0S3:
+ /*
+ * 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);
+ 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;
+}
+
+/*****************************************************************************/
+/* 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");