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/* Copyright (c) 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.
*/
/* rk3399 chipset power control module for Chrome EC */
#include "charge_state.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "ec_commands.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 "timer.h"
#include "usb_charge.h"
#include "util.h"
#include "wireless.h"
/* Console output macros */
#define CPUTS(outstr) cputs(CC_CHIPSET, outstr)
#define CPRINTS(format, args...) cprints(CC_CHIPSET, format, ## args)
/* Input state flags */
#define IN_PGOOD_PP5000 POWER_SIGNAL_MASK(PP5000_PWR_GOOD)
#define IN_PGOOD_SYS POWER_SIGNAL_MASK(SYS_PWR_GOOD)
#define IN_PGOOD_AP POWER_SIGNAL_MASK(AP_PWR_GOOD)
#define IN_SUSPEND_DEASSERTED POWER_SIGNAL_MASK(SUSPEND_DEASSERTED)
/* All always-on supplies */
#define IN_PGOOD_ALWAYS_ON (IN_PGOOD_SYS)
/* Rails requires for S3 */
#define IN_PGOOD_S3 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_PP5000)
/* Rails required for S0 */
#define IN_PGOOD_S0 (IN_PGOOD_S3 | IN_PGOOD_AP)
/* All inputs in the right state for S0 */
#define IN_ALL_S0 (IN_PGOOD_S0 | IN_SUSPEND_DEASSERTED)
/* Long power key press to force shutdown in S0 */
#define FORCED_SHUTDOWN_DELAY (8 * SECOND)
#define CHARGER_INITIALIZED_DELAY_MS 100
#define CHARGER_INITIALIZED_TRIES 40
static int forcing_shutdown;
void chipset_force_shutdown(void)
{
CPRINTS("%s()", __func__);
/*
* Force power off. This condition will reset once the state machine
* transitions to G3.
*/
forcing_shutdown = 1;
task_wake(TASK_ID_CHIPSET);
}
void chipset_reset(int cold_reset)
{
/* TODO: handle cold_reset */
CPRINTS("%s(%d)", __func__, cold_reset);
/* Pulse SYS_RST */
gpio_set_level(GPIO_SYS_RST_L, 0);
udelay(90);
gpio_set_level(GPIO_SYS_RST_L, 1);
}
enum power_state power_chipset_init(void)
{
if (system_jumped_to_this_image()) {
if ((power_get_signals() & IN_ALL_S0) == IN_ALL_S0) {
disable_sleep(SLEEP_MASK_AP_RUN);
CPRINTS("already in S0");
return POWER_S0;
}
wireless_set_state(WIRELESS_OFF);
} else if (!(system_get_reset_flags() & RESET_FLAG_AP_OFF))
/* Auto-power on */
chipset_exit_hard_off();
return POWER_G3;
}
static void force_shutdown(void)
{
forcing_shutdown = 1;
task_wake(TASK_ID_CHIPSET);
}
DECLARE_DEFERRED(force_shutdown);
enum power_state power_handle_state(enum power_state state)
{
static int sys_reset_needed;
int tries = 0;
switch (state) {
case POWER_G3:
break;
case POWER_S5:
if (forcing_shutdown)
return POWER_S5G3;
else
return POWER_S5S3;
break;
case POWER_S3:
if (!power_has_signals(IN_PGOOD_S3) || forcing_shutdown)
return POWER_S3S5;
else if (!gpio_get_level(GPIO_AP_EC_S3_S0_L))
return POWER_S3S0;
break;
case POWER_S0:
if (!power_has_signals(IN_PGOOD_S0) || forcing_shutdown)
return POWER_S0S3;
else if (gpio_get_level(GPIO_AP_EC_S3_S0_L))
return POWER_S0S3;
break;
case POWER_G3S5:
forcing_shutdown = 0;
/*
* Allow time 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;
}
/* Power up to next state */
return POWER_S5;
case POWER_S5S3:
gpio_set_level(GPIO_PPVAR_LOGIC_EN, 1);
gpio_set_level(GPIO_PP900_AP_EN, 1);
msleep(2);
gpio_set_level(GPIO_PP900_PMU_EN, 1);
gpio_set_level(GPIO_PP900_PLL_EN, 1);
gpio_set_level(GPIO_PP900_USB_EN, 1);
gpio_set_level(GPIO_PP900_DDRPLL_EN, 1);
gpio_set_level(GPIO_PP900_PCIE_EN, 1);
msleep(2);
gpio_set_level(GPIO_PP1800_PMU_EN_L, 0);
gpio_set_level(GPIO_PPVAR_CLOGIC_EN, 1);
msleep(2);
gpio_set_level(GPIO_PP1800_USB_EN_L, 0);
gpio_set_level(GPIO_PP1800_AP_AVDD_EN_L, 0);
msleep(2);
gpio_set_level(GPIO_LPDDR_PWR_EN, 1);
gpio_set_level(GPIO_PP5000_EN, 1);
msleep(2);
gpio_set_level(GPIO_PP1800_SIXAXIS_EN_L, 0);
msleep(2);
gpio_set_level(GPIO_PP3300_TRACKPAD_EN_L, 0);
/*
* TODO: Consider ADC_PP900_AP / ADC_PP1200_LPDDR analog
* voltage levels for state transition.
*/
if (power_wait_signals(IN_PGOOD_S3)) {
chipset_force_shutdown();
return POWER_S5;
}
/* Call hooks now that rails are up */
hook_notify(HOOK_CHIPSET_STARTUP);
/* We came from S5, so be sure to pulse sys_rst later */
sys_reset_needed = 1;
/* Power up to next state */
return POWER_S3;
case POWER_S3S0:
gpio_set_level(GPIO_AP_CORE_EN, 1);
msleep(2);
gpio_set_level(GPIO_PP1800_S0_EN_L, 0);
msleep(2);
gpio_set_level(GPIO_PP3300_S0_EN_L, 0);
msleep(2);
gpio_set_level(GPIO_PP3300_USB_EN_L, 0);
msleep(2);
if (sys_reset_needed) {
/* Pulse SYS_RST if we came from S5 */
gpio_set_level(GPIO_SYS_RST_L, 0);
msleep(10);
gpio_set_level(GPIO_SYS_RST_L, 1);
sys_reset_needed = 0;
}
gpio_set_level(GPIO_PP1800_LID_EN_L, 0);
gpio_set_level(GPIO_PP1800_SENSOR_EN_L, 0);
if (power_wait_signals(IN_PGOOD_S0)) {
chipset_force_shutdown();
return POWER_S3;
}
/* 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);
/* Power up to next state */
return POWER_S0;
case POWER_S0S3:
/* Call hooks before we remove power rails */
hook_notify(HOOK_CHIPSET_SUSPEND);
/* Suspend wireless */
wireless_set_state(WIRELESS_SUSPEND);
gpio_set_level(GPIO_PP1800_SENSOR_EN_L, 1);
gpio_set_level(GPIO_PP1800_LID_EN_L, 1);
msleep(10);
gpio_set_level(GPIO_PP3300_USB_EN_L, 1);
msleep(10);
gpio_set_level(GPIO_PP3300_S0_EN_L, 1);
msleep(10);
gpio_set_level(GPIO_PP1800_S0_EN_L, 1);
msleep(10);
gpio_set_level(GPIO_AP_CORE_EN, 0);
/*
* 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);
/*
* In case the power button is held awaiting power-off timeout,
* power off immediately now that we're entering S3.
*/
if (power_button_is_pressed()) {
forcing_shutdown = 1;
hook_call_deferred(&force_shutdown_data, -1);
}
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_PP3300_TRACKPAD_EN_L, 1);
msleep(10);
gpio_set_level(GPIO_PP1800_SIXAXIS_EN_L, 1);
msleep(10);
gpio_set_level(GPIO_PP5000_EN, 0);
gpio_set_level(GPIO_LPDDR_PWR_EN, 0);
msleep(10);
gpio_set_level(GPIO_PP1800_AP_AVDD_EN_L, 1);
gpio_set_level(GPIO_PP1800_USB_EN_L, 1);
msleep(10);
gpio_set_level(GPIO_PPVAR_CLOGIC_EN, 0);
gpio_set_level(GPIO_PP1800_PMU_EN_L, 1);
msleep(10);
gpio_set_level(GPIO_PP900_PCIE_EN, 0);
gpio_set_level(GPIO_PP900_DDRPLL_EN, 0);
gpio_set_level(GPIO_PP900_USB_EN, 0);
gpio_set_level(GPIO_PP900_PLL_EN, 0);
gpio_set_level(GPIO_PP900_PMU_EN, 0);
msleep(10);
gpio_set_level(GPIO_PP900_AP_EN, 0);
gpio_set_level(GPIO_PPVAR_LOGIC_EN, 0);
/* Start shutting down */
return POWER_S5;
case POWER_S5G3:
return POWER_G3;
}
return state;
}
static void power_button_changed(void)
{
if (power_button_is_pressed()) {
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
/* Power up from off */
chipset_exit_hard_off();
else if (!chipset_in_state(CHIPSET_STATE_ON)) {
/* Power down immediately from S3 */
force_shutdown();
return;
}
/* Delayed power down from S0, cancel on PB release */
hook_call_deferred(&force_shutdown_data,
FORCED_SHUTDOWN_DELAY);
} else {
/* Power button released, cancel deferred shutdown */
hook_call_deferred(&force_shutdown_data, -1);
}
}
DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, power_button_changed, HOOK_PRIO_DEFAULT);
static void lid_changed(void)
{
/* Power-up from off on lid open */
if (lid_is_open() && chipset_in_state(CHIPSET_STATE_ANY_OFF))
chipset_exit_hard_off();
}
DECLARE_HOOK(HOOK_LID_CHANGE, lid_changed, HOOK_PRIO_DEFAULT);
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