static int test_low_battery(void)
{
test_setup(1);
ccprintf("[CHARGING TEST] Low battery with AC\n");
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 2);
wait_charging_state();
mock_chipset_state = CHIPSET_STATE_SOFT_OFF;
hook_notify(HOOK_CHIPSET_SHUTDOWN);
TEST_ASSERT(!is_hibernated);
ccprintf("[CHARGING TEST] Low battery shutdown S0->S5\n");
mock_chipset_state = CHIPSET_STATE_ON;
hook_notify(HOOK_CHIPSET_PRE_INIT);
hook_notify(HOOK_CHIPSET_STARTUP);
gpio_set_level(GPIO_AC_PRESENT, 0);
is_hibernated = 0;
sb_write(SB_CURRENT, -1000);
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 2);
wait_charging_state();
mock_chipset_state = CHIPSET_STATE_SOFT_OFF;
hook_notify(HOOK_CHIPSET_SHUTDOWN);
wait_charging_state();
TEST_ASSERT(is_hibernated);
ccprintf("[CHARGING TEST] Low battery shutdown S5\n");
is_hibernated = 0;
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 10);
wait_charging_state();
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 2);
wait_charging_state();
TEST_ASSERT(is_hibernated);
ccprintf("[CHARGING TEST] Low battery AP shutdown\n");
is_shutdown = 0;
mock_chipset_state = CHIPSET_STATE_ON;
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 10);
gpio_set_level(GPIO_AC_PRESENT, 1);
sb_write(SB_CURRENT, 1000);
wait_charging_state();
gpio_set_level(GPIO_AC_PRESENT, 0);
sb_write(SB_CURRENT, -1000);
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 2);
wait_charging_state();
usleep(32 * SECOND);
wait_charging_state();
TEST_ASSERT(is_shutdown);
return EC_SUCCESS;
}
/**
* 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");
}
/**
* Handle debounced power button changing state.
*/
static void power_button_change_deferred(void)
{
const int new_pressed = raw_power_button_pressed();
/* Re-enable keyboard scanning if power button is no longer pressed */
if (!new_pressed)
keyboard_scan_enable(1, KB_SCAN_DISABLE_POWER_BUTTON);
/* If power button hasn't changed state, nothing to do */
if (new_pressed == debounced_power_pressed) {
power_button_is_stable = 1;
return;
}
debounced_power_pressed = new_pressed;
power_button_is_stable = 1;
CPRINTS("power button %s", new_pressed ? "pressed" : "released");
/* Call hooks */
hook_notify(HOOK_POWER_BUTTON_CHANGE);
/* Notify host if power button has been pressed */
if (new_pressed)
host_set_single_event(EC_HOST_EVENT_POWER_BUTTON);
}
static int lid_test(void)
{
lid_open = 0;
hook_notify(HOOK_LID_CHANGE);
mock_key(1, 1, 1);
TEST_ASSERT(expect_no_keychange() == EC_SUCCESS);
mock_key(1, 1, 0);
TEST_ASSERT(expect_no_keychange() == EC_SUCCESS);
lid_open = 1;
hook_notify(HOOK_LID_CHANGE);
mock_key(1, 1, 1);
TEST_ASSERT(expect_keychange() == EC_SUCCESS);
mock_key(1, 1, 0);
TEST_ASSERT(expect_keychange() == EC_SUCCESS);
return EC_SUCCESS;
}
/**
* Jump to what we hope is the init address of an image.
*
* This function does not return.
*
* @param init_addr Init address of target image
*/
static void jump_to_image(uintptr_t init_addr)
{
void (*resetvec)(void) = (void(*)(void))init_addr;
/*
* Jumping to any image asserts the signal to the Silego chip that that
* EC is not in read-only firmware. (This is not technically true if
* jumping from RO -> RO, but that's not a meaningful use case...).
*
* Pulse the signal long enough to set the latch in the Silego, then
* drop it again so we don't leak power through the pulldown in the
* Silego.
*/
gpio_set_level(GPIO_ENTERING_RW, 1);
usleep(MSEC);
gpio_set_level(GPIO_ENTERING_RW, 0);
#ifdef CONFIG_USB_POWER_DELIVERY
/*
* Notify USB PD module that we are about to sysjump and give it time
* to do what it needs.
*/
pd_prepare_sysjump();
usleep(5*MSEC);
#endif
/* Flush UART output unless the UART hasn't been initialized yet */
if (uart_init_done())
uart_flush_output();
/* Disable interrupts before jump */
interrupt_disable();
#ifdef CONFIG_DMA
/* Disable all DMA channels to avoid memory corruption */
dma_disable_all();
#endif /* CONFIG_DMA */
/* Fill in preserved data between jumps */
jdata->reserved0 = 0;
jdata->magic = JUMP_DATA_MAGIC;
jdata->version = JUMP_DATA_VERSION;
jdata->reset_flags = reset_flags;
jdata->jump_tag_total = 0; /* Reset tags */
jdata->struct_size = sizeof(struct jump_data);
/* Call other hooks; these may add tags */
hook_notify(HOOK_SYSJUMP);
/* Jump to the reset vector */
resetvec();
}
static void run_test_step3(void)
{
lid_open = 1;
hook_notify(HOOK_LID_CHANGE);
test_reset();
RUN_TEST(test_check_boot_down);
if (test_get_error_count())
test_reboot_to_next_step(TEST_STATE_FAILED);
else
test_reboot_to_next_step(TEST_STATE_PASSED);
}
/**
* Jump to what we hope is the init address of an image.
*
* This function does not return.
*
* @param init_addr Init address of target image
*/
static void jump_to_image(uintptr_t init_addr)
{
void (*resetvec)(void) = (void(*)(void))init_addr;
/*
* Jumping to any image asserts the signal to the Silego chip that that
* EC is not in read-only firmware. (This is not technically true if
* jumping from RO -> RO, but that's not a meaningful use case...).
*
* Pulse the signal long enough to set the latch in the Silego, then
* drop it again so we don't leak power through the pulldown in the
* Silego.
*/
gpio_set_level(GPIO_ENTERING_RW, 1);
usleep(MSEC);
gpio_set_level(GPIO_ENTERING_RW, 0);
#ifdef CONFIG_USB_POWER_DELIVERY
/*
* On sysjump, we are most definitely going to drop pings (if any)
* and lose all of our PD state. Instead of trying to remember all
* the states and deal with on-going transmission, let's send soft
* reset here so that the communication starts over without dropping
* power.
*/
pd_soft_reset();
usleep(5*MSEC);
#endif
/* Flush UART output unless the UART hasn't been initialized yet */
if (uart_init_done())
uart_flush_output();
/* Disable interrupts before jump */
interrupt_disable();
/* Fill in preserved data between jumps */
jdata->reserved0 = 0;
jdata->magic = JUMP_DATA_MAGIC;
jdata->version = JUMP_DATA_VERSION;
jdata->reset_flags = reset_flags;
jdata->jump_tag_total = 0; /* Reset tags */
jdata->struct_size = sizeof(struct jump_data);
/* Call other hooks; these may add tags */
hook_notify(HOOK_SYSJUMP);
/* Jump to the reset vector */
resetvec();
}
/**
* Deferred function to handle external power change
*/
static void extpower_deferred(void)
{
int extpower_presence = gpio_get_level(GPIO_AC_PRESENT);
if (extpower_presence == debounced_extpower_presence)
return;
debounced_extpower_presence = extpower_presence;
hook_notify(HOOK_AC_CHANGE);
/* Forward notification to host */
if (extpower_presence)
host_set_single_event(EC_HOST_EVENT_AC_CONNECTED);
else
host_set_single_event(EC_HOST_EVENT_AC_DISCONNECTED);
}
/**
* Power off the AP
*/
static void power_off(void)
{
/* 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, GPIO_INPUT);
lid_opened = 0;
enable_sleep(SLEEP_MASK_AP_RUN);
powerled_set_state(POWERLED_STATE_OFF);
CPRINTS("power shutdown complete");
}
/**
* Jump to what we hope is the init address of an image.
*
* This function does not return.
*
* @param init_addr Init address of target image
*/
static void jump_to_image(uintptr_t init_addr)
{
void (*resetvec)(void) = (void(*)(void))init_addr;
/*
* Jumping to any image asserts the signal to the Silego chip that that
* EC is not in read-only firmware. (This is not technically true if
* jumping from RO -> RO, but that's not a meaningful use case...).
*
* Pulse the signal long enough to set the latch in the Silego, then
* drop it again so we don't leak power through the pulldown in the
* Silego.
*/
gpio_set_level(GPIO_ENTERING_RW, 1);
usleep(MSEC);
gpio_set_level(GPIO_ENTERING_RW, 0);
#if defined(CONFIG_I2C) && !defined(CONFIG_I2C_SLAVE_ONLY)
/* Prepare I2C module for sysjump */
i2c_prepare_sysjump();
#endif
/* Flush UART output */
cflush();
/* Disable interrupts before jump */
interrupt_disable();
#ifdef CONFIG_DMA
/* Disable all DMA channels to avoid memory corruption */
dma_disable_all();
#endif /* CONFIG_DMA */
/* Fill in preserved data between jumps */
jdata->reserved0 = 0;
jdata->magic = JUMP_DATA_MAGIC;
jdata->version = JUMP_DATA_VERSION;
jdata->reset_flags = reset_flags;
jdata->jump_tag_total = 0; /* Reset tags */
jdata->struct_size = sizeof(struct jump_data);
/* Call other hooks; these may add tags */
hook_notify(HOOK_SYSJUMP);
/* Jump to the reset vector */
resetvec();
}
static void run_test_step1(void)
{
lid_open = 1;
hook_notify(HOOK_LID_CHANGE);
test_reset();
RUN_TEST(deghost_test);
RUN_TEST(debounce_test);
RUN_TEST(simulate_key_test);
#ifdef EMU_BUILD
RUN_TEST(runtime_key_test);
#endif
#ifdef CONFIG_LID_SWITCH
RUN_TEST(lid_test);
#endif
if (test_get_error_count())
test_reboot_to_next_step(TEST_STATE_FAILED);
else
test_reboot_to_next_step(TEST_STATE_STEP_2);
}
/**
* Jump to what we hope is the init address of an image.
*
* This function does not return.
*
* @param init_addr Init address of target image
*/
static void jump_to_image(uintptr_t init_addr)
{
void (*resetvec)(void) = (void(*)(void))init_addr;
/*
* Jumping to any image asserts the signal to the Silego chip that that
* EC is not in read-only firmware. (This is not technically true if
* jumping from RO -> RO, but that's not a meaningful use case...).
*
* Pulse the signal long enough to set the latch in the Silego, then
* drop it again so we don't leak power through the pulldown in the
* Silego.
*/
gpio_set_level(GPIO_ENTERING_RW, 1);
usleep(MSEC);
gpio_set_level(GPIO_ENTERING_RW, 0);
/* Flush UART output unless the UART hasn't been initialized yet */
if (uart_init_done())
uart_flush_output();
/* Disable interrupts before jump */
interrupt_disable();
/* Fill in preserved data between jumps */
jdata->reserved0 = 0;
jdata->magic = JUMP_DATA_MAGIC;
jdata->version = JUMP_DATA_VERSION;
jdata->reset_flags = reset_flags;
jdata->jump_tag_total = 0; /* Reset tags */
jdata->struct_size = sizeof(struct jump_data);
/* Call other hooks; these may add tags */
hook_notify(HOOK_SYSJUMP);
/* Jump to the reset vector */
resetvec();
}
static void lpc_chipset_reset(void)
{
hook_notify(HOOK_CHIPSET_RESET);
}
/**
* Battery charging task
*/
void charger_task(void)
{
struct charge_state_context *ctx = &task_ctx;
timestamp_t ts;
int sleep_usec = CHARGE_POLL_PERIOD_SHORT, diff_usec, sleep_next;
enum charge_state new_state;
uint8_t batt_flags;
while (1) {
#ifdef CONFIG_SB_FIRMWARE_UPDATE
if (sb_fw_update_in_progress()) {
task_wait_event(CHARGE_MAX_SLEEP_USEC);
continue;
}
#endif
state_common(ctx);
#ifdef CONFIG_CHARGER_TIMEOUT_HOURS
if (ctx->curr.state == PWR_STATE_CHARGE &&
ctx->charge_state_updated_time.val +
CONFIG_CHARGER_TIMEOUT_HOURS * HOUR < ctx->curr.ts.val) {
CPRINTS("Charge timed out after %d hours",
CONFIG_CHARGER_TIMEOUT_HOURS);
charge_force_idle(1);
}
#endif /* CONFIG_CHARGER_TIMEOUT_HOURS */
switch (ctx->prev.state) {
case PWR_STATE_INIT:
case PWR_STATE_REINIT:
new_state = state_init(ctx);
break;
case PWR_STATE_IDLE0:
new_state = state_idle(ctx);
/* If still idling, move from IDLE0 to IDLE */
if (new_state == PWR_STATE_UNCHANGE)
new_state = PWR_STATE_IDLE;
break;
case PWR_STATE_IDLE:
new_state = state_idle(ctx);
break;
case PWR_STATE_DISCHARGE:
new_state = state_discharge(ctx);
break;
case PWR_STATE_CHARGE:
new_state = state_charge(ctx);
if (new_state == PWR_STATE_UNCHANGE &&
(ctx->curr.batt.state_of_charge >=
BATTERY_LEVEL_NEAR_FULL)) {
/* Almost done charging */
new_state = PWR_STATE_CHARGE_NEAR_FULL;
}
break;
case PWR_STATE_CHARGE_NEAR_FULL:
new_state = state_charge(ctx);
if (new_state == PWR_STATE_UNCHANGE &&
(ctx->curr.batt.state_of_charge <
BATTERY_LEVEL_NEAR_FULL)) {
/* Battery below almost-full threshold. */
new_state = PWR_STATE_CHARGE;
}
break;
case PWR_STATE_ERROR:
new_state = state_error(ctx);
break;
default:
CPRINTS("Charge state %d undefined",
ctx->curr.state);
ctx->curr.state = PWR_STATE_ERROR;
new_state = PWR_STATE_ERROR;
}
if (state_machine_force_idle &&
ctx->prev.state != PWR_STATE_IDLE0 &&
ctx->prev.state != PWR_STATE_IDLE &&
ctx->prev.state != PWR_STATE_INIT &&
ctx->prev.state != PWR_STATE_REINIT)
new_state = PWR_STATE_REINIT;
if (new_state) {
ctx->curr.state = new_state;
CPRINTS("Charge state %s -> %s after %.6ld sec",
state_name[ctx->prev.state],
state_name[new_state],
ctx->curr.ts.val -
ctx->charge_state_updated_time.val);
ctx->charge_state_updated_time = ctx->curr.ts;
hook_notify(HOOK_CHARGE_STATE_CHANGE);
}
switch (new_state) {
case PWR_STATE_IDLE0:
/*
* First time transitioning from init -> idle. Don't
* set the flags or LED yet because we may transition
* to charging on the next call and we don't want to
* blink the LED green.
*/
sleep_usec = CHARGE_POLL_PERIOD_SHORT;
break;
case PWR_STATE_CHARGE_NEAR_FULL:
/*
* Battery is almost charged. The last few percent
* take a loooong time, so fall through and look like
* we're charged. This mirrors similar hacks at the
* ACPI/kernel/UI level.
*/
case PWR_STATE_IDLE:
batt_flags = *ctx->memmap_batt_flags;
batt_flags &= ~EC_BATT_FLAG_CHARGING;
batt_flags &= ~EC_BATT_FLAG_DISCHARGING;
*ctx->memmap_batt_flags = batt_flags;
/* Charge done */
sleep_usec = (new_state == PWR_STATE_IDLE
? CHARGE_POLL_PERIOD_LONG
: CHARGE_POLL_PERIOD_CHARGE);
break;
case PWR_STATE_DISCHARGE:
batt_flags = *ctx->memmap_batt_flags;
batt_flags &= ~EC_BATT_FLAG_CHARGING;
batt_flags |= EC_BATT_FLAG_DISCHARGING;
*ctx->memmap_batt_flags = batt_flags;
sleep_usec = CHARGE_POLL_PERIOD_LONG;
break;
case PWR_STATE_CHARGE:
batt_flags = *ctx->memmap_batt_flags;
batt_flags |= EC_BATT_FLAG_CHARGING;
batt_flags &= ~EC_BATT_FLAG_DISCHARGING;
*ctx->memmap_batt_flags = batt_flags;
/* Charging */
sleep_usec = CHARGE_POLL_PERIOD_CHARGE;
break;
case PWR_STATE_ERROR:
/* Error */
sleep_usec = CHARGE_POLL_PERIOD_CHARGE;
break;
case PWR_STATE_UNCHANGE:
/* Don't change sleep duration */
break;
default:
/* Other state; poll quickly and hope it goes away */
sleep_usec = CHARGE_POLL_PERIOD_SHORT;
}
#ifdef CONFIG_EXTPOWER_FALCO
watch_adapter_closely(ctx);
sleep_usec = EXTPOWER_FALCO_POLL_PERIOD;
#endif
/* Show charging progress in console */
charging_progress(ctx);
ts = get_time();
diff_usec = (int)(ts.val - ctx->curr.ts.val);
sleep_next = sleep_usec - diff_usec;
if (ctx->curr.state == PWR_STATE_DISCHARGE &&
chipset_in_state(CHIPSET_STATE_ANY_OFF |
CHIPSET_STATE_SUSPEND)) {
/*
* Discharging and system is off or suspended, so no
* need to poll frequently. charge_hook() will wake us
* up if anything important changes.
*/
sleep_next = CHARGE_POLL_PERIOD_VERY_LONG - diff_usec;
} else if (sleep_next < CHARGE_MIN_SLEEP_USEC) {
sleep_next = CHARGE_MIN_SLEEP_USEC;
} else if (sleep_next > CHARGE_MAX_SLEEP_USEC) {
sleep_next = CHARGE_MAX_SLEEP_USEC;
}
task_wait_event(sleep_next);
}
}
/* Test utilities */
static int test_lid_angle(void)
{
uint8_t *lpc_status = host_get_memmap(EC_MEMMAP_ACC_STATUS);
uint8_t sample;
struct motion_sensor_t *base = &motion_sensors[0];
struct motion_sensor_t *lid = &motion_sensors[1];
/* Go to S3 state */
hook_notify(HOOK_CHIPSET_STARTUP);
/* Go to S0 state */
hook_notify(HOOK_CHIPSET_RESUME);
/*
* Set the base accelerometer as if it were sitting flat on a desk
* and set the lid to closed.
*/
base->xyz[X] = 0;
base->xyz[Y] = 0;
base->xyz[Z] = 1000;
lid->xyz[X] = 0;
lid->xyz[Y] = 0;
lid->xyz[Z] = 1000;
sample = *lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK;
task_wake(TASK_ID_MOTIONSENSE);
while ((*lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK) == sample)
msleep(5);
TEST_ASSERT(motion_lid_get_angle() == 0);
/* Set lid open to 90 degrees. */
lid->xyz[X] = -1000;
lid->xyz[Y] = 0;
lid->xyz[Z] = 0;
sample = *lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK;
task_wake(TASK_ID_MOTIONSENSE);
while ((*lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK) == sample)
msleep(5);
TEST_ASSERT(motion_lid_get_angle() == 90);
/* Set lid open to 225. */
lid->xyz[X] = 500;
lid->xyz[Y] = 0;
lid->xyz[Z] = -500;
sample = *lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK;
task_wake(TASK_ID_MOTIONSENSE);
while ((*lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK) == sample)
msleep(5);
TEST_ASSERT(motion_lid_get_angle() == 225);
/*
* Align base with hinge and make sure it returns unreliable for angle.
* In this test it doesn't matter what the lid acceleration vector is.
*/
base->xyz[X] = 0;
base->xyz[Y] = 1000;
base->xyz[Z] = 0;
sample = *lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK;
task_wake(TASK_ID_MOTIONSENSE);
while ((*lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK) == sample)
msleep(5);
TEST_ASSERT(motion_lid_get_angle() == LID_ANGLE_UNRELIABLE);
/*
* Use all three axes and set lid to negative base and make sure
* angle is 180.
*/
base->xyz[X] = 500;
base->xyz[Y] = 400;
base->xyz[Z] = 300;
lid->xyz[X] = -500;
lid->xyz[Y] = -400;
lid->xyz[Z] = -300;
sample = *lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK;
task_wake(TASK_ID_MOTIONSENSE);
while ((*lpc_status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK) == sample)
msleep(5);
TEST_ASSERT(motion_lid_get_angle() == 180);
return EC_SUCCESS;
}
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;
}
enum power_state power_handle_state(enum power_state state)
{
/*
* Pass through RSMRST asynchronously, as PCH may not react
* immediately to power changes.
*/
int rsmrst_in = gpio_get_level(GPIO_RSMRST_L_PGOOD);
int rsmrst_out = gpio_get_level(GPIO_PCH_RSMRST_L);
#ifdef GLADOS_BOARD_V2
int tries = 0;
#endif
if (rsmrst_in != rsmrst_out) {
/*
* Wait at least 10ms between power signals going high
* and deasserting RSMRST to PCH.
*/
if (rsmrst_in)
msleep(10);
gpio_set_level(GPIO_PCH_RSMRST_L, rsmrst_in);
CPRINTS("RSMRST: %d", rsmrst_in);
}
switch (state) {
case POWER_G3:
if (forcing_shutdown) {
power_button_pch_release();
forcing_shutdown = 0;
}
break;
case POWER_S5:
if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 1)
return POWER_S5S3; /* Power up to next state */
break;
case POWER_S3:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S3S5;
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) {
/* Power up to next state */
return POWER_S3S0;
} else if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 0) {
/* Power down to next state */
return POWER_S3S5;
}
break;
case POWER_S0:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
chipset_force_shutdown();
return POWER_S0S3;
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) {
/* Power down to next state */
return POWER_S0S3;
}
break;
case POWER_G3S5:
/* Call hooks to initialize PMIC */
hook_notify(HOOK_CHIPSET_PRE_INIT);
if (power_wait_signals(IN_PCH_SLP_SUS_DEASSERTED)) {
chipset_force_shutdown();
return POWER_G3;
}
#ifdef GLADOS_BOARD_V2
/*
* Allow up to 1s for charger to be initialized, in case
* we're trying to boot the AP with no battery.
*/
while (charge_prevent_power_on() &&
tries++ < CHARGER_INITIALIZED_TRIES) {
msleep(CHARGER_INITIALIZED_DELAY_MS);
}
/* Return to G3 if battery level is too low */
if (charge_want_shutdown() ||
tries == CHARGER_INITIALIZED_TRIES) {
CPRINTS("power-up inhibited");
chipset_force_shutdown();
return POWER_G3;
}
/* Allow AP to power on */
gpio_set_level(GPIO_PMIC_SLP_SUS_L, 1);
gpio_set_level(GPIO_PCH_BATLOW_L, 1);
#endif
return POWER_S5;
case POWER_S5S3:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S5G3;
}
/* Enable TP + USB so that they can wake the system */
gpio_set_level(GPIO_ENABLE_TOUCHPAD, 1);
gpio_set_level(GPIO_USB1_ENABLE, 1);
gpio_set_level(GPIO_USB2_ENABLE, 1);
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_STARTUP);
return POWER_S3;
case POWER_S3S0:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S3S5;
}
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
/* Enable wireless */
wireless_set_state(WIRELESS_ON);
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_RESUME);
/*
* Disable idle task deep sleep. This means that the low
* power idle task will not go into deep sleep while in S0.
*/
disable_sleep(SLEEP_MASK_AP_RUN);
/*
* Throttle CPU if necessary. This should only be asserted
* when +VCCP is powered (it is by now).
*/
gpio_set_level(GPIO_CPU_PROCHOT, throttle_cpu);
return POWER_S0;
case POWER_S0S3:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SUSPEND);
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
/* Suspend wireless */
wireless_set_state(WIRELESS_SUSPEND);
/*
* Enable idle task deep sleep. Allow the low power idle task
* to go into deep sleep in S3 or lower.
*/
enable_sleep(SLEEP_MASK_AP_RUN);
return POWER_S3;
case POWER_S3S5:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SHUTDOWN);
/* Disable wireless */
wireless_set_state(WIRELESS_OFF);
gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0);
gpio_set_level(GPIO_USB1_ENABLE, 0);
gpio_set_level(GPIO_USB2_ENABLE, 0);
return POWER_S5G3;
case POWER_S5G3:
#ifdef CONFIG_G3_SLEEP
gpio_set_level(GPIO_G3_SLEEP_EN, 1);
#endif
chipset_force_g3();
return POWER_G3;
default:
break;
}
return state;
}
/* Main loop */
void charger_task(void)
{
int sleep_usec;
int need_static = 1;
const struct charger_info * const info = charger_get_info();
/* Get the battery-specific values */
batt_info = battery_get_info();
prev_ac = prev_charge = -1;
chg_ctl_mode = CHARGE_CONTROL_NORMAL;
shutdown_warning_time.val = 0UL;
battery_seems_to_be_dead = 0;
/*
* If system is not locked and we don't have a battery to live on,
* then use max input current limit so that we can pull as much power
* as needed.
*/
battery_get_params(&curr.batt);
prev_bp = curr.batt.is_present;
curr.desired_input_current = get_desired_input_current(prev_bp, info);
while (1) {
#ifdef CONFIG_SB_FIRMWARE_UPDATE
if (sb_fw_update_in_progress()) {
task_wait_event(CHARGE_MAX_SLEEP_USEC);
continue;
}
#endif
/* Let's see what's going on... */
curr.ts = get_time();
sleep_usec = 0;
problems_exist = 0;
curr.ac = extpower_is_present();
if (curr.ac != prev_ac) {
if (curr.ac) {
/*
* Some chargers are unpowered when the AC is
* off, so we'll reinitialize it when AC
* comes back and set the input current limit.
* Try again if it fails.
*/
int rv = charger_post_init();
if (rv != EC_SUCCESS) {
problem(PR_POST_INIT, rv);
} else {
if (curr.desired_input_current !=
CHARGE_CURRENT_UNINITIALIZED)
rv = charger_set_input_current(
curr.desired_input_current);
if (rv != EC_SUCCESS)
problem(PR_SET_INPUT_CURR, rv);
else
prev_ac = curr.ac;
}
} else {
/* Some things are only meaningful on AC */
chg_ctl_mode = CHARGE_CONTROL_NORMAL;
battery_seems_to_be_dead = 0;
prev_ac = curr.ac;
}
}
charger_get_params(&curr.chg);
battery_get_params(&curr.batt);
if (prev_bp != curr.batt.is_present) {
prev_bp = curr.batt.is_present;
/* Update battery info due to change of battery */
batt_info = battery_get_info();
need_static = 1;
curr.desired_input_current =
get_desired_input_current(prev_bp, info);
if (curr.desired_input_current !=
CHARGE_CURRENT_UNINITIALIZED)
charger_set_input_current(
curr.desired_input_current);
hook_notify(HOOK_BATTERY_SOC_CHANGE);
}
/*
* TODO(crosbug.com/p/27527). Sometimes the battery thinks its
* temperature is 6280C, which seems a bit high. Let's ignore
* anything above the boiling point of tungsten until this bug
* is fixed. If the battery is really that warm, we probably
* have more urgent problems.
*/
if (curr.batt.temperature > CELSIUS_TO_DECI_KELVIN(5660)) {
CPRINTS("ignoring ridiculous batt.temp of %dC",
DECI_KELVIN_TO_CELSIUS(curr.batt.temperature));
curr.batt.flags |= BATT_FLAG_BAD_TEMPERATURE;
}
/* If the battery thinks it's above 100%, don't believe it */
if (curr.batt.state_of_charge > 100) {
CPRINTS("ignoring ridiculous batt.soc of %d%%",
curr.batt.state_of_charge);
curr.batt.flags |= BATT_FLAG_BAD_STATE_OF_CHARGE;
}
/*
* Now decide what we want to do about it. We'll normally just
* pass along whatever the battery wants to the charger. Note
* that if battery_get_params() can't get valid values from the
* battery it uses (0, 0), which is probably safer than blindly
* applying power to a battery we can't talk to.
*/
curr.requested_voltage = curr.batt.desired_voltage;
curr.requested_current = curr.batt.desired_current;
/* If we *know* there's no battery, wait for one to appear. */
if (curr.batt.is_present == BP_NO) {
ASSERT(curr.ac); /* How are we running? */
curr.state = ST_IDLE;
curr.batt_is_charging = 0;
battery_was_removed = 1;
goto wait_for_it;
}
/*
* If we had trouble talking to the battery or the charger, we
* should probably do nothing for a bit, and if it doesn't get
* better then flag it as an error.
*/
if (curr.chg.flags & CHG_FLAG_BAD_ANY)
problem(PR_CHG_FLAGS, curr.chg.flags);
if (curr.batt.flags & BATT_FLAG_BAD_ANY)
problem(PR_BATT_FLAGS, curr.batt.flags);
/*
* If AC is present, check if input current is sufficient to
* actually charge battery.
*/
curr.batt_is_charging = curr.ac && (curr.batt.current >= 0);
/* Don't let the battery hurt itself. */
shutdown_on_critical_battery();
if (!curr.ac) {
curr.state = ST_DISCHARGE;
goto wait_for_it;
}
/* Okay, we're on AC and we should have a battery. */
/* Used for factory tests. */
if (chg_ctl_mode != CHARGE_CONTROL_NORMAL) {
curr.state = ST_IDLE;
goto wait_for_it;
}
/* If the battery is not responsive, try to wake it up. */
if (!(curr.batt.flags & BATT_FLAG_RESPONSIVE)) {
if (battery_seems_to_be_dead || battery_is_cut_off()) {
/* It's dead, do nothing */
curr.state = ST_IDLE;
curr.requested_voltage = 0;
curr.requested_current = 0;
} else if (curr.state == ST_PRECHARGE &&
(get_time().val > precharge_start_time.val +
PRECHARGE_TIMEOUT_US)) {
/* We've tried long enough, give up */
CPRINTS("battery seems to be dead");
battery_seems_to_be_dead = 1;
curr.state = ST_IDLE;
curr.requested_voltage = 0;
curr.requested_current = 0;
} else {
/* See if we can wake it up */
if (curr.state != ST_PRECHARGE) {
CPRINTS("try to wake battery");
precharge_start_time = get_time();
need_static = 1;
}
curr.state = ST_PRECHARGE;
curr.requested_voltage =
batt_info->voltage_max;
curr.requested_current =
batt_info->precharge_current;
}
goto wait_for_it;
} else {
/* The battery is responding. Yay. Try to use it. */
#ifdef CONFIG_BATTERY_REQUESTS_NIL_WHEN_DEAD
/*
* TODO (crosbug.com/p/29467): remove this workaround
* for dead battery that requests no voltage/current
*/
if (curr.requested_voltage == 0 &&
curr.requested_current == 0 &&
curr.batt.state_of_charge == 0) {
/* Battery is dead, give precharge current */
curr.requested_voltage =
batt_info->voltage_max;
curr.requested_current =
batt_info->precharge_current;
} else
#endif
#ifdef CONFIG_BATTERY_REVIVE_DISCONNECT
battery_seems_to_be_disconnected = 0;
if (curr.requested_voltage == 0 &&
curr.requested_current == 0 &&
battery_get_disconnect_state() ==
BATTERY_DISCONNECTED) {
/*
* Battery is in disconnect state. Apply a
* current to kick it out of this state.
*/
CPRINTS("found battery in disconnect state");
curr.requested_voltage =
batt_info->voltage_max;
curr.requested_current =
batt_info->precharge_current;
battery_seems_to_be_disconnected = 1;
} else
#endif
if (curr.state == ST_PRECHARGE ||
battery_seems_to_be_dead ||
battery_was_removed) {
CPRINTS("battery woke up");
/* Update the battery-specific values */
batt_info = battery_get_info();
need_static = 1;
}
battery_seems_to_be_dead = battery_was_removed = 0;
curr.state = ST_CHARGE;
}
/*
* TODO(crosbug.com/p/27643): Quit trying if charging too long
* without getting full (CONFIG_CHARGER_TIMEOUT_HOURS).
*/
wait_for_it:
#ifdef CONFIG_CHARGER_PROFILE_OVERRIDE
sleep_usec = charger_profile_override(&curr);
if (sleep_usec < 0)
problem(PR_CUSTOM, sleep_usec);
#endif
/* Keep the AP informed */
if (need_static)
need_static = update_static_battery_info();
/* Wait on the dynamic info until the static info is good. */
if (!need_static)
update_dynamic_battery_info();
notify_host_of_low_battery();
/* And the EC console */
is_full = calc_is_full();
if ((!(curr.batt.flags & BATT_FLAG_BAD_STATE_OF_CHARGE) &&
curr.batt.state_of_charge != prev_charge) ||
(is_full != prev_full)) {
show_charging_progress();
prev_charge = curr.batt.state_of_charge;
hook_notify(HOOK_BATTERY_SOC_CHANGE);
}
prev_full = is_full;
/* Turn charger off if it's not needed */
if (curr.state == ST_IDLE || curr.state == ST_DISCHARGE) {
curr.requested_voltage = 0;
curr.requested_current = 0;
}
/* Apply external limits */
if (curr.requested_current > user_current_limit)
curr.requested_current = user_current_limit;
/* Round to valid values */
curr.requested_voltage =
charger_closest_voltage(curr.requested_voltage);
curr.requested_current =
charger_closest_current(curr.requested_current);
/* Charger only accpets request when AC is on. */
if (curr.ac) {
/*
* Some batteries would wake up after cut-off if we keep
* charging it. Thus, we only charge when AC is on and
* battery is not cut off yet.
*/
if (battery_is_cut_off())
charge_request(0, 0);
/*
* As a safety feature, some chargers will stop
* charging if we don't communicate with it frequently
* enough. In manual mode, we'll just tell it what it
* knows.
*/
else if (manual_mode) {
charge_request(curr.chg.voltage,
curr.chg.current);
} else {
charge_request(curr.requested_voltage,
curr.requested_current);
}
} else {
charge_request(
charger_closest_voltage(
curr.batt.voltage + info->voltage_step), -1);
}
/* How long to sleep? */
if (problems_exist)
/* If there are errors, don't wait very long. */
sleep_usec = CHARGE_POLL_PERIOD_SHORT;
else if (sleep_usec <= 0) {
/* default values depend on the state */
if (curr.state == ST_IDLE ||
curr.state == ST_DISCHARGE) {
/* If AP is off, we can sleep a long time */
if (chipset_in_state(CHIPSET_STATE_ANY_OFF |
CHIPSET_STATE_SUSPEND))
sleep_usec =
CHARGE_POLL_PERIOD_VERY_LONG;
else
/* Discharging, not too urgent */
sleep_usec = CHARGE_POLL_PERIOD_LONG;
} else {
/* Charging, so pay closer attention */
sleep_usec = CHARGE_POLL_PERIOD_CHARGE;
}
}
/* Adjust for time spent in this loop */
sleep_usec -= (int)(get_time().val - curr.ts.val);
if (sleep_usec < CHARGE_MIN_SLEEP_USEC)
sleep_usec = CHARGE_MIN_SLEEP_USEC;
else if (sleep_usec > CHARGE_MAX_SLEEP_USEC)
sleep_usec = CHARGE_MAX_SLEEP_USEC;
task_wait_event(sleep_usec);
}
}
/**
* Set which oscillator is used for the clock
*
* @param osc Oscillator to use
*/
static void clock_set_osc(enum clock_osc osc)
{
uint32_t tmp_acr;
if (osc == current_osc)
return;
if (current_osc != OSC_INIT)
hook_notify(HOOK_PRE_FREQ_CHANGE);
switch (osc) {
case OSC_HSI:
/* Ensure that HSI is ON */
if (!(STM32_RCC_CR & STM32_RCC_CR_HSIRDY)) {
/* Enable HSI */
STM32_RCC_CR |= STM32_RCC_CR_HSION;
/* Wait for HSI to be ready */
while (!(STM32_RCC_CR & STM32_RCC_CR_HSIRDY))
;
}
/* Disable LPSDSR */
STM32_PWR_CR &= ~STM32_PWR_CR_LPSDSR;
/*
* Set the recommended flash settings for 16MHz clock.
*
* The 3 bits must be programmed strictly sequentially.
* Also, follow the RM to check 64-bit access and latency bit
* after writing those bits to the FLASH_ACR register.
*/
tmp_acr = STM32_FLASH_ACR;
/* Enable 64-bit access */
tmp_acr |= STM32_FLASH_ACR_ACC64;
STM32_FLASH_ACR = tmp_acr;
/* Check ACC64 bit == 1 */
while (!(STM32_FLASH_ACR & STM32_FLASH_ACR_ACC64))
;
/* Enable Prefetch Buffer */
tmp_acr |= STM32_FLASH_ACR_PRFTEN;
STM32_FLASH_ACR = tmp_acr;
/* Flash 1 wait state */
tmp_acr |= STM32_FLASH_ACR_LATENCY;
STM32_FLASH_ACR = tmp_acr;
/* Check LATENCY bit == 1 */
while (!(STM32_FLASH_ACR & STM32_FLASH_ACR_LATENCY))
;
/* Switch to HSI */
STM32_RCC_CFGR = STM32_RCC_CFGR_SW_HSI;
/* RM says to check SWS bits to make sure HSI is the sysclock */
while ((STM32_RCC_CFGR & STM32_RCC_CFGR_SWS_MASK) !=
STM32_RCC_CFGR_SWS_HSI)
;
/* Disable MSI */
STM32_RCC_CR &= ~STM32_RCC_CR_MSION;
freq = HSI_CLOCK;
break;
case OSC_MSI:
/* Switch to MSI @ 1MHz */
STM32_RCC_ICSCR =
(STM32_RCC_ICSCR & ~STM32_RCC_ICSCR_MSIRANGE_MASK) |
STM32_RCC_ICSCR_MSIRANGE_1MHZ;
/* Ensure that MSI is ON */
if (!(STM32_RCC_CR & STM32_RCC_CR_MSIRDY)) {
/* Enable MSI */
STM32_RCC_CR |= STM32_RCC_CR_MSION;
/* Wait for MSI to be ready */
while (!(STM32_RCC_CR & STM32_RCC_CR_MSIRDY))
;
}
/* Switch to MSI */
STM32_RCC_CFGR = STM32_RCC_CFGR_SW_MSI;
/* RM says to check SWS bits to make sure MSI is the sysclock */
while ((STM32_RCC_CFGR & STM32_RCC_CFGR_SWS_MASK) !=
STM32_RCC_CFGR_SWS_MSI)
;
/*
* Set the recommended flash settings for <= 2MHz clock.
*
* The 3 bits must be programmed strictly sequentially.
* Also, follow the RM to check 64-bit access and latency bit
* after writing those bits to the FLASH_ACR register.
*/
tmp_acr = STM32_FLASH_ACR;
/* Flash 0 wait state */
tmp_acr &= ~STM32_FLASH_ACR_LATENCY;
STM32_FLASH_ACR = tmp_acr;
/* Check LATENCY bit == 0 */
while (STM32_FLASH_ACR & STM32_FLASH_ACR_LATENCY)
;
/* Disable prefetch Buffer */
tmp_acr &= ~STM32_FLASH_ACR_PRFTEN;
STM32_FLASH_ACR = tmp_acr;
/* Disable 64-bit access */
tmp_acr &= ~STM32_FLASH_ACR_ACC64;
STM32_FLASH_ACR = tmp_acr;
/* Check ACC64 bit == 0 */
while (STM32_FLASH_ACR & STM32_FLASH_ACR_ACC64)
;
/* Disable HSI */
STM32_RCC_CR &= ~STM32_RCC_CR_HSION;
/* Enable LPSDSR */
STM32_PWR_CR |= STM32_PWR_CR_LPSDSR;
freq = MSI_1MHZ_CLOCK;
break;
default:
break;
}
/* Notify modules of frequency change unless we're initializing */
if (current_osc != OSC_INIT) {
current_osc = osc;
hook_notify(HOOK_FREQ_CHANGE);
} else {
current_osc = osc;
}
}
static int test_low_battery(void)
{
test_setup(1);
ccprintf("[CHARGING TEST] Low battery with AC and positive current\n");
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 2);
sb_write(SB_CURRENT, 1000);
wait_charging_state();
mock_chipset_state = CHIPSET_STATE_SOFT_OFF;
hook_notify(HOOK_CHIPSET_SHUTDOWN);
TEST_ASSERT(!is_hibernated);
ccprintf("[CHARGING TEST] Low battery with AC and negative current\n");
sb_write(SB_CURRENT, -1000);
wait_charging_state();
sleep(CONFIG_BATTERY_CRITICAL_SHUTDOWN_TIMEOUT);
TEST_ASSERT(is_hibernated);
ccprintf("[CHARGING TEST] Low battery shutdown S0->S5\n");
mock_chipset_state = CHIPSET_STATE_ON;
hook_notify(HOOK_CHIPSET_PRE_INIT);
hook_notify(HOOK_CHIPSET_STARTUP);
gpio_set_level(GPIO_AC_PRESENT, 0);
is_hibernated = 0;
sb_write(SB_CURRENT, -1000);
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 2);
wait_charging_state();
mock_chipset_state = CHIPSET_STATE_SOFT_OFF;
hook_notify(HOOK_CHIPSET_SHUTDOWN);
wait_charging_state();
/* after a while, the EC should hibernate */
sleep(CONFIG_BATTERY_CRITICAL_SHUTDOWN_TIMEOUT);
TEST_ASSERT(is_hibernated);
ccprintf("[CHARGING TEST] Low battery shutdown S5\n");
is_hibernated = 0;
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 10);
wait_charging_state();
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 2);
wait_charging_state();
/* after a while, the EC should hibernate */
sleep(CONFIG_BATTERY_CRITICAL_SHUTDOWN_TIMEOUT);
TEST_ASSERT(is_hibernated);
ccprintf("[CHARGING TEST] Low battery AP shutdown\n");
is_shutdown = 0;
mock_chipset_state = CHIPSET_STATE_ON;
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 10);
gpio_set_level(GPIO_AC_PRESENT, 1);
sb_write(SB_CURRENT, 1000);
wait_charging_state();
gpio_set_level(GPIO_AC_PRESENT, 0);
sb_write(SB_CURRENT, -1000);
sb_write(SB_RELATIVE_STATE_OF_CHARGE, 2);
wait_charging_state();
usleep(32 * SECOND);
wait_charging_state();
TEST_ASSERT(is_shutdown);
return EC_SUCCESS;
}
enum power_state power_handle_state(enum power_state state)
{
switch (state) {
case POWER_G3:
break;
case POWER_S5:
if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 1)
return POWER_S5S3; /* Power up to next state */
break;
case POWER_S3:
/* Check for state transitions */
if (!power_has_signals(IN_PGOOD_S3)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S3S5;
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) {
/* Power up to next state */
return POWER_S3S0;
} else if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 0) {
/* Power down to next state */
return POWER_S3S5;
}
break;
case POWER_S0:
if (!power_has_signals(IN_PGOOD_S0)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S0S3;
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) {
/* Power down to next state */
return POWER_S0S3;
}
break;
case POWER_G3S5:
/* Enable 3.3V DSW */
gpio_set_level(GPIO_PP3300_DSW_EN, 1);
/*
* Wait 10ms after +3VALW good, since that powers VccDSW and
* VccSUS.
*/
msleep(10);
/* Enable PP5000 (5V) rail as 1.05V and 1.2V rails need 5V
* rail to regulate properly. */
gpio_set_level(GPIO_PP5000_EN, 1);
/* Wait for PP1050/PP1200 PGOOD to go LOW to
* indicate that PP5000 is stable */
while ((power_get_signals() & IN_PGOOD_PP5000) != 0) {
if (task_wait_event(SECOND) == TASK_EVENT_TIMER) {
CPRINTS("timeout waiting for PP5000");
gpio_set_level(GPIO_PP5000_EN, 0);
chipset_force_shutdown();
return POWER_G3;
}
}
/* Turn on 3.3V DSW gated rail for core regulator */
gpio_set_level(GPIO_PP3300_DSW_GATED_EN, 1);
/* Assert DPWROK */
gpio_set_level(GPIO_PCH_DPWROK, 1);
/* Enable PP1050 rail. */
gpio_set_level(GPIO_PP1050_EN, 1);
/* Wait for 1.05V to come up and CPU to notice */
if (power_wait_signals(IN_PGOOD_PP1050 |
IN_PCH_SLP_SUS_DEASSERTED)) {
gpio_set_level(GPIO_PP1050_EN, 0);
gpio_set_level(GPIO_PP3300_DSW_GATED_EN, 0);
gpio_set_level(GPIO_PP5000_EN, 0);
chipset_force_shutdown();
return POWER_G3;
}
/* Wait 5ms for SUSCLK to stabilize */
msleep(5);
/* Call hook to indicate out of G3 state */
hook_notify(HOOK_CHIPSET_PRE_INIT);
return POWER_S5;
case POWER_S5S3:
/* Turn on power to RAM */
gpio_set_level(GPIO_PP1800_EN, 1);
gpio_set_level(GPIO_PP1200_EN, 1);
if (power_wait_signals(IN_PGOOD_S3)) {
gpio_set_level(GPIO_PP1800_EN, 0);
gpio_set_level(GPIO_PP1200_EN, 0);
chipset_force_shutdown();
return POWER_S5;
}
/*
* Take lightbar out of reset, now that +5VALW is
* available and we won't leak +3VALW through the reset
* line.
*/
gpio_set_level(GPIO_LIGHTBAR_RESET_L, 1);
/*
* Enable touchpad power so it can wake the system from
* suspend.
*/
gpio_set_level(GPIO_ENABLE_TOUCHPAD, 1);
/* Turn on USB power rail. */
gpio_set_level(GPIO_PP5000_USB_EN, 1);
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_STARTUP);
return POWER_S3;
case POWER_S3S0:
/* Wait 20ms before allowing VCCST_PGOOD to rise. */
msleep(20);
/* Enable wireless. */
wireless_set_state(WIRELESS_ON);
/* Make sure the touchscreen is on, too. */
gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 1);
/* Wait for non-core power rails good */
if (power_wait_signals(IN_PGOOD_S0)) {
chipset_force_shutdown();
wireless_set_state(WIRELESS_OFF);
return POWER_S3;
}
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_RESUME);
/*
* Disable idle task deep sleep. This means that the low
* power idle task will not go into deep sleep while in S0.
*/
disable_sleep(SLEEP_MASK_AP_RUN);
/* Wait 99ms after all voltages good */
msleep(99);
/*
* Throttle CPU if necessary. This should only be asserted
* when +VCCP is powered (it is by now).
*/
gpio_set_level(GPIO_CPU_PROCHOT, throttle_cpu);
/* Set PCH_PWROK */
gpio_set_level(GPIO_PCH_PWROK, 1);
gpio_set_level(GPIO_SYS_PWROK, 1);
return POWER_S0;
case POWER_S0S3:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SUSPEND);
/* Clear PCH_PWROK */
gpio_set_level(GPIO_SYS_PWROK, 0);
gpio_set_level(GPIO_PCH_PWROK, 0);
/* Wait 40ns */
udelay(1);
/* Suspend wireless */
wireless_set_state(WIRELESS_SUSPEND);
/*
* Enable idle task deep sleep. Allow the low power idle task
* to go into deep sleep in S3 or lower.
*/
enable_sleep(SLEEP_MASK_AP_RUN);
/*
* Deassert prochot since CPU is off and we're about to drop
* +VCCP.
*/
gpio_set_level(GPIO_CPU_PROCHOT, 0);
return POWER_S3;
case POWER_S3S5:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SHUTDOWN);
/* Disable wireless */
wireless_set_state(WIRELESS_OFF);
/* Disable peripheral power */
gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0);
gpio_set_level(GPIO_PP5000_USB_EN, 0);
/* Turn off power to RAM */
gpio_set_level(GPIO_PP1800_EN, 0);
gpio_set_level(GPIO_PP1200_EN, 0);
/*
* Put touchscreen and lightbar in reset, so we won't
* leak +3VALW through the reset line to chips powered
* by +5VALW.
*
* (Note that we're no longer powering down +5VALW due
* to crosbug.com/p/16600, but to minimize side effects
* of that change we'll still reset these components in
* S5.)
*/
gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0);
gpio_set_level(GPIO_LIGHTBAR_RESET_L, 0);
return pause_in_s5 ? POWER_S5 : POWER_S5G3;
case POWER_S5G3:
/* Deassert DPWROK */
gpio_set_level(GPIO_PCH_DPWROK, 0);
/* Turn off power rails enabled in S5 */
gpio_set_level(GPIO_PP1050_EN, 0);
gpio_set_level(GPIO_PP3300_DSW_GATED_EN, 0);
gpio_set_level(GPIO_PP5000_EN, 0);
/* Disable 3.3V DSW */
gpio_set_level(GPIO_PP3300_DSW_EN, 0);
return POWER_G3;
}
return state;
}
static enum power_state _power_handle_state(enum power_state state)
{
int tries = 0;
switch (state) {
case POWER_G3:
break;
case POWER_S5:
if (forcing_shutdown) {
power_button_pch_release();
forcing_shutdown = 0;
}
#ifdef CONFIG_BOARD_HAS_RTC_RESET
/* Wait for S5 exit and attempt RTC reset it supported */
if (power_s5_up)
return power_wait_s5_rtc_reset();
#endif
if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 1)
return POWER_S5S3; /* Power up to next state */
break;
case POWER_S3:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S3S5;
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) {
/* Power up to next state */
return POWER_S3S0;
} else if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 0) {
/* Power down to next state */
return POWER_S3S5;
}
break;
case POWER_S0:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
chipset_force_shutdown();
return POWER_S0S3;
#ifdef CONFIG_POWER_S0IX
} else if ((gpio_get_level(GPIO_PCH_SLP_S0_L) == 0) &&
(gpio_get_level(GPIO_PCH_SLP_S3_L) == 1)) {
return POWER_S0S0ix;
#endif
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) {
/* Power down to next state */
return POWER_S0S3;
}
break;
#ifdef CONFIG_POWER_S0IX
case POWER_S0ix:
/*
* TODO: add code for unexpected power loss
*/
if ((gpio_get_level(GPIO_PCH_SLP_S0_L) == 1) &&
(gpio_get_level(GPIO_PCH_SLP_S3_L) == 1)) {
return POWER_S0ixS0;
}
break;
#endif
case POWER_G3S5:
/* Call hooks to initialize PMIC */
hook_notify(HOOK_CHIPSET_PRE_INIT);
/*
* Allow up to 1s for charger to be initialized, in case
* we're trying to boot the AP with no battery.
*/
while (charge_prevent_power_on(0) &&
tries++ < CHARGER_INITIALIZED_TRIES) {
msleep(CHARGER_INITIALIZED_DELAY_MS);
}
/* Return to G3 if battery level is too low */
if (charge_want_shutdown() ||
tries > CHARGER_INITIALIZED_TRIES) {
CPRINTS("power-up inhibited");
chipset_force_shutdown();
return POWER_G3;
}
if (power_wait_signals(IN_PCH_SLP_SUS_DEASSERTED)) {
chipset_force_shutdown();
return POWER_G3;
}
power_s5_up = 1;
return POWER_S5;
case POWER_S5S3:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S5G3;
}
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_STARTUP);
return POWER_S3;
case POWER_S3S0:
if (!power_has_signals(IN_PGOOD_ALL_CORE)) {
/* Required rail went away */
chipset_force_shutdown();
return POWER_S3S5;
}
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
/* Enable wireless */
wireless_set_state(WIRELESS_ON);
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_RESUME);
/*
* Disable idle task deep sleep. This means that the low
* power idle task will not go into deep sleep while in S0.
*/
disable_sleep(SLEEP_MASK_AP_RUN);
/*
* Throttle CPU if necessary. This should only be asserted
* when +VCCP is powered (it is by now).
*/
gpio_set_level(GPIO_CPU_PROCHOT, throttle_cpu);
return POWER_S0;
case POWER_S0S3:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SUSPEND);
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
/* Suspend wireless */
wireless_set_state(WIRELESS_SUSPEND);
/*
* Enable idle task deep sleep. Allow the low power idle task
* to go into deep sleep in S3 or lower.
*/
enable_sleep(SLEEP_MASK_AP_RUN);
return POWER_S3;
#ifdef CONFIG_POWER_S0IX
case POWER_S0S0ix:
/* call hooks before standby */
hook_notify(HOOK_CHIPSET_SUSPEND);
lpc_enable_wake_mask_for_lid_open();
/*
* Enable idle task deep sleep. Allow the low power idle task
* to go into deep sleep in S0ix.
*/
enable_sleep(SLEEP_MASK_AP_RUN);
return POWER_S0ix;
case POWER_S0ixS0:
lpc_disable_wake_mask_for_lid_open();
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_RESUME);
/*
* Disable idle task deep sleep. This means that the low
* power idle task will not go into deep sleep while in S0.
*/
disable_sleep(SLEEP_MASK_AP_RUN);
return POWER_S0;
#endif
case POWER_S3S5:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SHUTDOWN);
/* Disable wireless */
wireless_set_state(WIRELESS_OFF);
/* Always enter into S5 state. The S5 state is required to
* correctly handle global resets which have a bit of delay
* while the SLP_Sx_L signals are asserted then deasserted. */
power_s5_up = 0;
return POWER_S5;
case POWER_S5G3:
chipset_force_g3();
return POWER_G3;
default:
break;
}
return state;
}
/**
* Set system clock oscillator
*
* @param osc Oscillator to use
* @param pll_osc Source oscillator for PLL. Ignored if osc is not PLL.
*/
static void clock_set_osc(enum clock_osc osc, enum clock_osc pll_osc)
{
uint32_t val;
if (osc == current_osc)
return;
if (current_osc != OSC_INIT)
hook_notify(HOOK_PRE_FREQ_CHANGE);
switch (osc) {
case OSC_HSI:
/* Ensure that HSI is ON */
clock_enable_osc(osc);
/* Disable LPSDSR */
STM32_PWR_CR &= ~STM32_PWR_CR_LPSDSR;
/* Switch to HSI */
clock_switch_osc(osc);
/* Disable MSI */
STM32_RCC_CR &= ~STM32_RCC_CR_MSION;
freq = STM32_HSI_CLOCK;
break;
case OSC_MSI:
/* Switch to MSI @ 1MHz */
STM32_RCC_ICSCR =
(STM32_RCC_ICSCR & ~STM32_RCC_ICSCR_MSIRANGE_MASK) |
STM32_RCC_ICSCR_MSIRANGE_1MHZ;
/* Ensure that MSI is ON */
clock_enable_osc(osc);
/* Switch to MSI */
clock_switch_osc(osc);
/* Disable HSI */
STM32_RCC_CR &= ~STM32_RCC_CR_HSION;
/* Enable LPSDSR */
STM32_PWR_CR |= STM32_PWR_CR_LPSDSR;
freq = STM32_MSI_CLOCK;
break;
#ifdef STM32_HSE_CLOCK
case OSC_HSE:
/* Ensure that HSE is stable */
clock_enable_osc(osc);
/* Switch to HSE */
clock_switch_osc(osc);
/* Disable other clock sources */
STM32_RCC_CR &= ~(STM32_RCC_CR_MSION | STM32_RCC_CR_HSION |
STM32_RCC_CR_PLLON);
freq = STM32_HSE_CLOCK;
break;
#endif
case OSC_PLL:
/* Ensure that source clock is stable */
clock_enable_osc(pll_osc);
/* Configure PLLCFGR */
freq = stm32_configure_pll(pll_osc, STM32_PLLM,
STM32_PLLN, STM32_PLLR);
ASSERT(freq > 0);
/* Adjust flash latency as instructed in TRM */
val = STM32_FLASH_ACR;
val &= ~STM32_FLASH_ACR_LATENCY_MASK;
/* Flash 4 wait state. TODO: Should depend on freq. */
val |= 4 << STM32_FLASH_ACR_LATENCY_SHIFT;
STM32_FLASH_ACR = val;
while (STM32_FLASH_ACR != val)
;
/* Switch to PLL */
clock_switch_osc(osc);
/* TODO: Disable other sources */
break;
default:
break;
}
/* Notify modules of frequency change unless we're initializing */
if (current_osc != OSC_INIT) {
current_osc = osc;
hook_notify(HOOK_FREQ_CHANGE);
} else {
current_osc = osc;
}
}