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|
/* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Puff board-specific configuration */
#include "adc.h"
#include "button.h"
#include "charge_manager.h"
#include "charge_state_v2.h"
#include "chipset.h"
#include "common.h"
#include "core/cortex-m/cpu.h"
#include "cros_board_info.h"
#include "driver/ina3221.h"
#include "driver/ppc/sn5s330.h"
#include "driver/tcpm/anx7447.h"
#include "driver/tcpm/ps8xxx.h"
#include "driver/tcpm/tcpci.h"
#include "ec_commands.h"
#include "extpower.h"
#include "fan.h"
#include "fan_chip.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "lid_switch.h"
#include "power.h"
#include "power/cometlake-discrete.h"
#include "power_button.h"
#include "pwm.h"
#include "pwm_chip.h"
#include "spi.h"
#include "switch.h"
#include "system.h"
#include "task.h"
#include "temp_sensor.h"
#include "thermal.h"
#include "temp_sensor/thermistor.h"
#include "uart.h"
#include "usb_charge.h"
#include "usb_common.h"
#include "usb_pd.h"
#include "usbc_ppc.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ##args)
#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ##args)
static void power_monitor(void);
DECLARE_DEFERRED(power_monitor);
static void ppc_interrupt(enum gpio_signal signal)
{
if (signal == GPIO_USB_C0_TCPPC_INT_ODL)
sn5s330_interrupt(0);
}
int ppc_get_alert_status(int port)
{
return gpio_get_level(GPIO_USB_C0_TCPPC_INT_ODL) == 0;
}
static void tcpc_alert_event(enum gpio_signal signal)
{
if (signal == GPIO_USB_C0_TCPC_INT_ODL)
schedule_deferred_pd_interrupt(0);
}
uint16_t tcpc_get_alert_status(void)
{
uint16_t status = 0;
int level;
/*
* Check which port has the ALERT line set and ignore if that TCPC has
* its reset line active.
*/
if (!gpio_get_level(GPIO_USB_C0_TCPC_INT_ODL)) {
level = !!(tcpc_config[USB_PD_PORT_TCPC_0].flags &
TCPC_FLAGS_RESET_ACTIVE_HIGH);
if (gpio_get_level(GPIO_USB_C0_TCPC_RST) != level)
status |= PD_STATUS_TCPC_ALERT_0;
}
return status;
}
/* Called when the charge manager has switched to a new port. */
void board_set_charge_limit(int port, int supplier, int charge_ma, int max_ma,
int charge_mv)
{
/* Blink alert if insufficient power per system_can_boot_ap(). */
int insufficient_power =
(charge_ma * charge_mv) <
(CONFIG_CHARGER_MIN_POWER_MW_FOR_POWER_ON * 1000);
led_alert(insufficient_power);
}
static uint8_t usbc_overcurrent;
static int32_t base_5v_power;
/*
* Power usage for each port as measured or estimated.
* Units are milliwatts (5v x ma current)
*/
#define PWR_BASE_LOAD (5 * 1335)
#define PWR_FRONT_HIGH (5 * 1603)
#define PWR_FRONT_LOW (5 * 963)
#define PWR_REAR (5 * 1075)
#define PWR_HDMI (5 * 562)
#define PWR_C_HIGH (5 * 3740)
#define PWR_C_LOW (5 * 2090)
#define PWR_MAX (5 * 10000)
/*
* Update the 5V power usage, assuming no throttling,
* and invoke the power monitoring.
*/
static void update_5v_usage(void)
{
int front_ports = 0;
/*
* Recalculate the 5V load, assuming no throttling.
*/
base_5v_power = PWR_BASE_LOAD;
if (!gpio_get_level(GPIO_USB_A0_OC_ODL)) {
front_ports++;
base_5v_power += PWR_FRONT_LOW;
}
if (!gpio_get_level(GPIO_USB_A1_OC_ODL)) {
front_ports++;
base_5v_power += PWR_FRONT_LOW;
}
/*
* Only 1 front port can run higher power at a time.
*/
if (front_ports > 0)
base_5v_power += PWR_FRONT_HIGH - PWR_FRONT_LOW;
if (!gpio_get_level(GPIO_USB_A2_OC_ODL))
base_5v_power += PWR_REAR;
if (!gpio_get_level(GPIO_USB_A3_OC_ODL))
base_5v_power += PWR_REAR;
if (ec_config_get_usb4_present() && !gpio_get_level(GPIO_USB_A4_OC_ODL))
base_5v_power += PWR_REAR;
if (!gpio_get_level(GPIO_HDMI_CONN0_OC_ODL))
base_5v_power += PWR_HDMI;
if (!gpio_get_level(GPIO_HDMI_CONN1_OC_ODL))
base_5v_power += PWR_HDMI;
if (usbc_overcurrent)
base_5v_power += PWR_C_HIGH;
/*
* Invoke the power handler immediately.
*/
hook_call_deferred(&power_monitor_data, 0);
}
DECLARE_DEFERRED(update_5v_usage);
/*
* Start power monitoring after ADCs have been initialised.
*/
DECLARE_HOOK(HOOK_INIT, update_5v_usage, HOOK_PRIO_INIT_ADC + 1);
static void port_ocp_interrupt(enum gpio_signal signal)
{
hook_call_deferred(&update_5v_usage_data, 0);
}
/******************************************************************************/
/*
* Barrel jack power supply handling
*
* EN_PPVAR_BJ_ADP_L must default active to ensure we can power on when the
* barrel jack is connected, and the USB-C port can bring the EC up fine in
* dead-battery mode. Both the USB-C and barrel jack switches do reverse
* protection, so we're safe to turn one on then the other off- but we should
* only do that if the system is off since it might still brown out.
*/
/*
* Barrel-jack power adapter ratings.
*/
static const struct {
int voltage;
int current;
} bj_power[] = {
{ /* 0 - 65W (also default) */
.voltage = 19000,
.current = 3420 },
{ /* 1 - 90W */
.voltage = 19000,
.current = 4740 },
};
#define ADP_DEBOUNCE_MS 1000 /* Debounce time for BJ plug/unplug */
/* Debounced connection state of the barrel jack */
static int8_t adp_connected = -1;
static void adp_connect_deferred(void)
{
struct charge_port_info pi = { 0 };
int connected = !gpio_get_level(GPIO_BJ_ADP_PRESENT_L);
/* Debounce */
if (connected == adp_connected)
return;
if (connected) {
unsigned int bj = ec_config_get_bj_power();
pi.voltage = bj_power[bj].voltage;
pi.current = bj_power[bj].current;
}
charge_manager_update_charge(CHARGE_SUPPLIER_DEDICATED,
DEDICATED_CHARGE_PORT, &pi);
adp_connected = connected;
}
DECLARE_DEFERRED(adp_connect_deferred);
/* IRQ for BJ plug/unplug. It shouldn't be called if BJ is the power source. */
void adp_connect_interrupt(enum gpio_signal signal)
{
hook_call_deferred(&adp_connect_deferred_data, ADP_DEBOUNCE_MS * MSEC);
}
static void adp_state_init(void)
{
/*
* Initialize all charge suppliers to 0. The charge manager waits until
* all ports have reported in before doing anything.
*/
for (int i = 0; i < CHARGE_PORT_COUNT; i++) {
for (int j = 0; j < CHARGE_SUPPLIER_COUNT; j++)
charge_manager_update_charge(j, i, NULL);
}
/* Report charge state from the barrel jack. */
adp_connect_deferred();
}
DECLARE_HOOK(HOOK_INIT, adp_state_init, HOOK_PRIO_INIT_CHARGE_MANAGER + 1);
#include "gpio_list.h" /* Must come after other header files. */
/******************************************************************************/
/* SPI devices */
const struct spi_device_t spi_devices[] = {};
const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices);
/******************************************************************************/
/* PWM channels. Must be in the exactly same order as in enum pwm_channel. */
const struct pwm_t pwm_channels[] = {
[PWM_CH_FAN] = { .channel = 5,
.flags = PWM_CONFIG_OPEN_DRAIN,
.freq = 25000 },
[PWM_CH_LED_RED] = { .channel = 0,
.flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP,
.freq = 2000 },
[PWM_CH_LED_GREEN] = { .channel = 2,
.flags = PWM_CONFIG_ACTIVE_LOW |
PWM_CONFIG_DSLEEP,
.freq = 2000 },
};
/******************************************************************************/
/* USB-C TCPC Configuration */
const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_MAX_COUNT] = {
[USB_PD_PORT_TCPC_0] = {
.bus_type = EC_BUS_TYPE_I2C,
.i2c_info = {
.port = I2C_PORT_TCPC0,
.addr_flags = AN7447_TCPC0_I2C_ADDR_FLAGS,
},
.drv = &anx7447_tcpm_drv,
.flags = TCPC_FLAGS_RESET_ACTIVE_HIGH,
},
};
const struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_MAX_COUNT] = {
[USB_PD_PORT_TCPC_0] = {
.usb_port = USB_PD_PORT_TCPC_0,
.driver = &anx7447_usb_mux_driver,
.hpd_update = &anx7447_tcpc_update_hpd_status,
},
};
/******************************************************************************/
/* I2C port map configuration */
const struct i2c_port_t i2c_ports[] = {
{ .name = "ina",
.port = I2C_PORT_INA,
.kbps = 400,
.scl = GPIO_I2C0_SCL,
.sda = GPIO_I2C0_SDA },
{ .name = "ppc0",
.port = I2C_PORT_PPC0,
.kbps = 400,
.scl = GPIO_I2C1_SCL,
.sda = GPIO_I2C1_SDA },
{ .name = "tcpc0",
.port = I2C_PORT_TCPC0,
.kbps = 400,
.scl = GPIO_I2C3_SCL,
.sda = GPIO_I2C3_SDA },
{ .name = "power",
.port = I2C_PORT_POWER,
.kbps = 400,
.scl = GPIO_I2C5_SCL,
.sda = GPIO_I2C5_SDA },
{ .name = "eeprom",
.port = I2C_PORT_EEPROM,
.kbps = 400,
.scl = GPIO_I2C7_SCL,
.sda = GPIO_I2C7_SDA },
};
const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
const struct adc_t adc_channels[] = {
[ADC_SNS_PP3300] = {
/*
* 4700/5631 voltage divider: can take the value out of range
* for 32-bit signed integers, so truncate to 470/563 yielding
* <0.1% error and a maximum intermediate value of 1623457792,
* which comfortably fits in int32.
*/
.name = "SNS_PP3300",
.input_ch = NPCX_ADC_CH2,
.factor_mul = ADC_MAX_VOLT * 563,
.factor_div = (ADC_READ_MAX + 1) * 470,
},
[ADC_SNS_PP1050] = {
.name = "SNS_PP1050",
.input_ch = NPCX_ADC_CH7,
.factor_mul = ADC_MAX_VOLT,
.factor_div = ADC_READ_MAX + 1,
},
[ADC_VBUS] = { /* 5/39 voltage divider */
.name = "VBUS",
.input_ch = NPCX_ADC_CH4,
.factor_mul = ADC_MAX_VOLT * 39,
.factor_div = (ADC_READ_MAX + 1) * 5,
},
[ADC_PPVAR_IMON] = { /* 500 mV/A */
.name = "PPVAR_IMON",
.input_ch = NPCX_ADC_CH9,
.factor_mul = ADC_MAX_VOLT * 2, /* Milliamps */
.factor_div = ADC_READ_MAX + 1,
},
[ADC_TEMP_SENSOR_1] = {
.name = "TEMP_SENSOR_1",
.input_ch = NPCX_ADC_CH0,
.factor_mul = ADC_MAX_VOLT,
.factor_div = ADC_READ_MAX + 1,
},
};
BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
const struct temp_sensor_t temp_sensors[] = {
[TEMP_SENSOR_CORE] = {
.name = "Core",
.type = TEMP_SENSOR_TYPE_BOARD,
.read = get_temp_3v3_30k9_47k_4050b,
.idx = ADC_TEMP_SENSOR_1,
},
};
BUILD_ASSERT(ARRAY_SIZE(temp_sensors) == TEMP_SENSOR_COUNT);
/******************************************************************************/
/* Wake up pins */
const enum gpio_signal hibernate_wake_pins[] = {};
const int hibernate_wake_pins_used = ARRAY_SIZE(hibernate_wake_pins);
/******************************************************************************/
/* Physical fans. These are logically separate from pwm_channels. */
const struct fan_conf fan_conf_0 = {
.flags = FAN_USE_RPM_MODE,
.ch = MFT_CH_0, /* Use MFT id to control fan */
.pgood_gpio = -1,
.enable_gpio = -1,
};
const struct fan_rpm fan_rpm_0 = {
.rpm_min = 1900,
.rpm_start = 2400,
.rpm_max = 4300,
};
const struct fan_t fans[] = {
[FAN_CH_0] = { .conf = &fan_conf_0, .rpm = &fan_rpm_0, },
};
BUILD_ASSERT(ARRAY_SIZE(fans) == FAN_CH_COUNT);
/******************************************************************************/
/* MFT channels. These are logically separate from pwm_channels. */
const struct mft_t mft_channels[] = {
[MFT_CH_0] = { NPCX_MFT_MODULE_2, TCKC_LFCLK, PWM_CH_FAN },
};
BUILD_ASSERT(ARRAY_SIZE(mft_channels) == MFT_CH_COUNT);
/******************************************************************************/
/* Thermal control; drive fan based on temperature sensors. */
/*
* TODO(b/202062363): Remove when clang is fixed.
*/
#define THERMAL_A \
{ \
.temp_host = { \
[EC_TEMP_THRESH_WARN] = 0, \
[EC_TEMP_THRESH_HIGH] = C_TO_K(68), \
[EC_TEMP_THRESH_HALT] = C_TO_K(78), \
}, \
.temp_host_release = { \
[EC_TEMP_THRESH_WARN] = 0, \
[EC_TEMP_THRESH_HIGH] = C_TO_K(58), \
[EC_TEMP_THRESH_HALT] = 0, \
}, \
.temp_fan_off = C_TO_K(41), \
.temp_fan_max = C_TO_K(72), \
}
__maybe_unused static const struct ec_thermal_config thermal_a = THERMAL_A;
/*
* TODO(b/202062363): Remove when clang is fixed.
*/
#define THERMAL_B \
{ \
.temp_host = { \
[EC_TEMP_THRESH_WARN] = 0, \
[EC_TEMP_THRESH_HIGH] = C_TO_K(78), \
[EC_TEMP_THRESH_HALT] = C_TO_K(85), \
}, \
.temp_host_release = { \
[EC_TEMP_THRESH_WARN] = 0, \
[EC_TEMP_THRESH_HIGH] = C_TO_K(70), \
[EC_TEMP_THRESH_HALT] = 0, \
}, \
}
__maybe_unused static const struct ec_thermal_config thermal_b = THERMAL_B;
struct ec_thermal_config thermal_params[] = {
[TEMP_SENSOR_CORE] = THERMAL_A,
};
BUILD_ASSERT(ARRAY_SIZE(thermal_params) == TEMP_SENSOR_COUNT);
/* Power sensors */
const struct ina3221_t ina3221[] = {
{ I2C_PORT_INA, 0x40, { "PP3300_G", "PP5000_A", "PP3300_WLAN" } },
{ I2C_PORT_INA, 0x42, { "PP3300_A", "PP3300_SSD", "PP3300_LAN" } },
{ I2C_PORT_INA, 0x43, { NULL, "PP1200_U", "PP2500_DRAM" } }
};
const unsigned int ina3221_count = ARRAY_SIZE(ina3221);
static uint16_t board_version;
static uint32_t sku_id;
static uint32_t fw_config;
static void cbi_init(void)
{
/*
* Load board info from CBI to control per-device configuration.
*
* If unset it's safe to treat the board as a proto, just C10 gating
* won't be enabled.
*/
uint32_t val;
if (cbi_get_board_version(&val) == EC_SUCCESS && val <= UINT16_MAX)
board_version = val;
if (cbi_get_sku_id(&val) == EC_SUCCESS)
sku_id = val;
if (cbi_get_fw_config(&val) == EC_SUCCESS)
fw_config = val;
CPRINTS("Board Version: %d, SKU ID: 0x%08x, F/W config: 0x%08x",
board_version, sku_id, fw_config);
}
DECLARE_HOOK(HOOK_INIT, cbi_init, HOOK_PRIO_INIT_I2C + 1);
static void board_init(void)
{
uint8_t *memmap_batt_flags;
/* Override some GPIO interrupt priorities.
*
* These interrupts are timing-critical for AP power sequencing, so we
* increase their NVIC priority from the default of 3. This affects
* whole MIWU groups of 8 GPIOs since they share an IRQ.
*
* Latency at the default priority level can be hundreds of
* microseconds while other equal-priority IRQs are serviced, so GPIOs
* requiring faster response must be higher priority.
*/
/* CPU_C10_GATE_L on GPIO6.7: must be ~instant for ~60us response. */
cpu_set_interrupt_priority(NPCX_IRQ_WKINTH_1, 1);
/*
* slp_s3_interrupt (GPIOA.5 on WKINTC_0) must respond within 200us
* (tPLT18); less critical than the C10 gate.
*/
cpu_set_interrupt_priority(NPCX_IRQ_WKINTC_0, 2);
gpio_enable_interrupt(GPIO_BJ_ADP_PRESENT_L);
/* Always claim AC is online, because we don't have a battery. */
memmap_batt_flags = host_get_memmap(EC_MEMMAP_BATT_FLAG);
*memmap_batt_flags |= EC_BATT_FLAG_AC_PRESENT;
/*
* For board version < 2, the directly connected recovery
* button is not available.
*/
if (board_version < 2)
button_disable_gpio(BUTTON_RECOVERY);
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
static void board_chipset_startup(void)
{
/*
* Workaround to restore VBUS on PPC.
* PP1 is sourced from PP5000_A, and when the CPU shuts down and
* this rail drops, the PPC will internally turn off PP1_EN.
* When the CPU starts again, and the rail is restored, the PPC
* does not turn PP1_EN on again, causing VBUS to stay turned off.
* The workaround is to check whether the PPC is sourcing VBUS, and
* if so, make sure it is enabled.
*/
if (ppc_is_sourcing_vbus(0))
ppc_vbus_source_enable(0, 1);
}
DECLARE_HOOK(HOOK_CHIPSET_STARTUP, board_chipset_startup, HOOK_PRIO_DEFAULT);
/******************************************************************************/
/* USB-C PPC Configuration */
struct ppc_config_t ppc_chips[CONFIG_USB_PD_PORT_MAX_COUNT] = {
[USB_PD_PORT_TCPC_0] = { .i2c_port = I2C_PORT_PPC0,
.i2c_addr_flags = SN5S330_ADDR0_FLAGS,
.drv = &sn5s330_drv },
};
unsigned int ppc_cnt = ARRAY_SIZE(ppc_chips);
/* USB-A port control */
const int usb_port_enable[USB_PORT_COUNT] = {
GPIO_EN_PP5000_USB_VBUS,
};
/* Power Delivery and charging functions */
static void board_tcpc_init(void)
{
/*
* Reset TCPC if we have had a system reset.
* With EFSv2, it is possible to be in RW without
* having reset the TCPC.
*/
if (system_get_reset_flags() & EC_RESET_FLAG_POWER_ON)
board_reset_pd_mcu();
/* Enable TCPC interrupts. */
gpio_enable_interrupt(GPIO_USB_C0_TCPPC_INT_ODL);
gpio_enable_interrupt(GPIO_USB_C0_TCPC_INT_ODL);
/* Enable other overcurrent interrupts */
gpio_enable_interrupt(GPIO_HDMI_CONN0_OC_ODL);
gpio_enable_interrupt(GPIO_HDMI_CONN1_OC_ODL);
gpio_enable_interrupt(GPIO_USB_A0_OC_ODL);
gpio_enable_interrupt(GPIO_USB_A1_OC_ODL);
gpio_enable_interrupt(GPIO_USB_A2_OC_ODL);
gpio_enable_interrupt(GPIO_USB_A3_OC_ODL);
if (ec_config_get_usb4_present()) {
/*
* By default configured as output low.
*/
gpio_set_flags(GPIO_USB_A4_OC_ODL, GPIO_INPUT | GPIO_INT_BOTH);
gpio_enable_interrupt(GPIO_USB_A4_OC_ODL);
} else {
/* Ensure no interrupts from pin */
gpio_disable_interrupt(GPIO_USB_A4_OC_ODL);
}
}
/* Make sure this is called after fw_config is initialised */
DECLARE_HOOK(HOOK_INIT, board_tcpc_init, HOOK_PRIO_INIT_I2C + 2);
int64_t get_time_dsw_pwrok(void)
{
/* DSW_PWROK is turned on before EC was powered. */
return -20 * MSEC;
}
void board_reset_pd_mcu(void)
{
int level = !!(tcpc_config[USB_PD_PORT_TCPC_0].flags &
TCPC_FLAGS_RESET_ACTIVE_HIGH);
gpio_set_level(GPIO_USB_C0_TCPC_RST, level);
msleep(BOARD_TCPC_C0_RESET_HOLD_DELAY);
gpio_set_level(GPIO_USB_C0_TCPC_RST, !level);
if (BOARD_TCPC_C0_RESET_POST_DELAY)
msleep(BOARD_TCPC_C0_RESET_POST_DELAY);
}
int board_set_active_charge_port(int port)
{
CPRINTS("Requested charge port change to %d", port);
/*
* The charge manager may ask us to switch to no charger if we're
* running off USB-C only but upstream doesn't support PD. It requires
* that we accept this switch otherwise it triggers an assert and EC
* reset; it's not possible to boot the AP anyway, but we want to avoid
* resetting the EC so we can continue to do the "low power" LED blink.
*/
if (port == CHARGE_PORT_NONE)
return EC_SUCCESS;
if (port < 0 || CHARGE_PORT_COUNT <= port)
return EC_ERROR_INVAL;
if (port == charge_manager_get_active_charge_port())
return EC_SUCCESS;
/* Don't charge from a source port */
if (board_vbus_source_enabled(port))
return EC_ERROR_INVAL;
if (!chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
int bj_active, bj_requested;
if (charge_manager_get_active_charge_port() != CHARGE_PORT_NONE)
/* Change is only permitted while the system is off */
return EC_ERROR_INVAL;
/*
* Current setting is no charge port but the AP is on, so the
* charge manager is out of sync (probably because we're
* reinitializing after sysjump). Reject requests that aren't
* in sync with our outputs.
*/
bj_active = !gpio_get_level(GPIO_EN_PPVAR_BJ_ADP_L);
bj_requested = port == CHARGE_PORT_BARRELJACK;
if (bj_active != bj_requested)
return EC_ERROR_INVAL;
}
CPRINTS("New charger p%d", port);
switch (port) {
case CHARGE_PORT_TYPEC0:
/* TODO(b/143975429) need to touch the PD controller? */
gpio_set_level(GPIO_EN_PPVAR_BJ_ADP_L, 1);
break;
case CHARGE_PORT_BARRELJACK:
/* Make sure BJ adapter is sourcing power */
if (gpio_get_level(GPIO_BJ_ADP_PRESENT_L))
return EC_ERROR_INVAL;
/* TODO(b/143975429) need to touch the PD controller? */
gpio_set_level(GPIO_EN_PPVAR_BJ_ADP_L, 0);
break;
default:
return EC_ERROR_INVAL;
}
return EC_SUCCESS;
}
void board_overcurrent_event(int port, int is_overcurrented)
{
/* Check that port number is valid. */
if ((port < 0) || (port >= CONFIG_USB_PD_PORT_MAX_COUNT))
return;
usbc_overcurrent = is_overcurrented;
update_5v_usage();
}
int extpower_is_present(void)
{
return adp_connected;
}
int board_is_c10_gate_enabled(void)
{
/*
* Puff proto drives EN_PP5000_HDMI from EN_S0_RAILS so we cannot gate
* core rails while in S0 because HDMI should remain powered.
* EN_PP5000_HDMI is a separate EC output on all other boards.
*/
return board_version != 0;
}
void board_enable_s0_rails(int enable)
{
/* This output isn't connected on protos; safe to set anyway. */
gpio_set_level(GPIO_EN_PP5000_HDMI, enable);
}
unsigned int ec_config_get_bj_power(void)
{
unsigned int bj = (fw_config & EC_CFG_BJ_POWER_MASK) >>
EC_CFG_BJ_POWER_L;
/* Out of range value defaults to 0 */
if (bj >= ARRAY_SIZE(bj_power))
bj = 0;
return bj;
}
int ec_config_get_usb4_present(void)
{
return !(fw_config & EC_CFG_NO_USB4_MASK);
}
unsigned int ec_config_get_thermal_solution(void)
{
return (fw_config & EC_CFG_THERMAL_MASK) >> EC_CFG_THERMAL_L;
}
static void setup_thermal(void)
{
unsigned int table = ec_config_get_thermal_solution();
/* Configure Fan */
switch (table) {
/* Default and table0 use single fan */
case 0:
default:
thermal_params[TEMP_SENSOR_CORE] = thermal_a;
break;
/* Table1 is fanless */
case 1:
fan_set_count(0);
thermal_params[TEMP_SENSOR_CORE] = thermal_b;
break;
}
}
/* fan_set_count should be called before HOOK_INIT/HOOK_PRIO_DEFAULT */
DECLARE_HOOK(HOOK_INIT, setup_thermal, HOOK_PRIO_DEFAULT - 1);
/*
* Power monitoring and management.
*
* The overall goal is to gracefully manage the power demand so that
* the power budgets are met without letting the system fall into
* power deficit (perhaps causing a brownout).
*
* There are 2 power budgets that need to be managed:
* - overall system power as measured on the main power supply rail.
* - 5V power delivered to the USB and HDMI ports.
*
* The actual system power demand is calculated from the VBUS voltage and
* the input current (read from a shunt), averaged over 5 readings.
* The power budget limit is from the charge manager.
*
* The 5V power cannot be read directly. Instead, we rely on overcurrent
* inputs from the USB and HDMI ports to indicate that the port is in use
* (and drawing maximum power).
*
* There are 3 throttles that can be applied (in priority order):
*
* - Type A BC1.2 front port restriction (3W)
* - Type C PD (throttle to 1.5A if sourcing)
* - Turn on PROCHOT, which immediately throttles the CPU.
*
* The first 2 throttles affect both the system power and the 5V rails.
* The third is a last resort to force an immediate CPU throttle to
* reduce the overall power use.
*
* The strategy is to determine what the state of the throttles should be,
* and to then turn throttles off or on as needed to match this.
*
* This function runs on demand, or every 2 ms when the CPU is up,
* and continually monitors the power usage, applying the
* throttles when necessary.
*
* All measurements are in milliwatts.
*/
#define THROT_TYPE_A BIT(0)
#define THROT_TYPE_C BIT(1)
#define THROT_PROCHOT BIT(2)
/*
* Power gain if front USB A ports are limited.
*/
#define POWER_GAIN_TYPE_A 3200
/*
* Power gain if Type C port is limited.
*/
#define POWER_GAIN_TYPE_C 8800
/*
* Power is averaged over 10 ms, with a reading every 2 ms.
*/
#define POWER_DELAY_MS 2
#define POWER_READINGS (10 / POWER_DELAY_MS)
static void power_monitor(void)
{
static uint32_t current_state;
static uint32_t history[POWER_READINGS];
static uint8_t index;
int32_t delay;
uint32_t new_state = 0, diff;
int32_t headroom_5v = PWR_MAX - base_5v_power;
/*
* If CPU is off or suspended, no need to throttle
* or restrict power.
*/
if (chipset_in_state(CHIPSET_STATE_ANY_OFF | CHIPSET_STATE_SUSPEND)) {
/*
* Slow down monitoring, assume no throttling required.
*/
delay = 20 * MSEC;
/*
* Clear the first entry of the power table so that
* it is re-initilalised when the CPU starts.
*/
history[0] = 0;
} else {
int32_t charger_mw;
delay = POWER_DELAY_MS * MSEC;
/*
* Get current charger limit (in mw).
* If not configured yet, skip.
*/
charger_mw = charge_manager_get_power_limit_uw() / 1000;
if (charger_mw != 0) {
int32_t gap, total, max, power;
int i;
/*
* Read power usage.
*/
power = (adc_read_channel(ADC_VBUS) *
adc_read_channel(ADC_PPVAR_IMON)) /
1000;
/* Init power table */
if (history[0] == 0) {
for (i = 0; i < POWER_READINGS; i++)
history[i] = power;
}
/*
* Update the power readings and
* calculate the average and max.
*/
history[index] = power;
index = (index + 1) % POWER_READINGS;
total = 0;
max = history[0];
for (i = 0; i < POWER_READINGS; i++) {
total += history[i];
if (history[i] > max)
max = history[i];
}
/*
* For Type-C power supplies, there is
* less tolerance for exceeding the rating,
* so use the max power that has been measured
* over the measuring period.
* For barrel-jack supplies, the rating can be
* exceeded briefly, so use the average.
*/
if (charge_manager_get_supplier() == CHARGE_SUPPLIER_PD)
power = max;
else
power = total / POWER_READINGS;
/*
* Calculate gap, and if negative, power
* demand is exceeding configured power budget, so
* throttling is required to reduce the demand.
*/
gap = charger_mw - power;
/*
* Limiting type-A power.
*/
if (gap <= 0) {
new_state |= THROT_TYPE_A;
headroom_5v += PWR_FRONT_HIGH - PWR_FRONT_LOW;
if (!(current_state & THROT_TYPE_A))
gap += POWER_GAIN_TYPE_A;
}
/*
* If the type-C port is sourcing power,
* check whether it should be throttled.
*/
if (ppc_is_sourcing_vbus(0) && gap <= 0) {
new_state |= THROT_TYPE_C;
headroom_5v += PWR_C_HIGH - PWR_C_LOW;
if (!(current_state & THROT_TYPE_C))
gap += POWER_GAIN_TYPE_C;
}
/*
* As a last resort, turn on PROCHOT to
* throttle the CPU.
*/
if (gap <= 0)
new_state |= THROT_PROCHOT;
}
}
/*
* Check the 5v power usage and if necessary,
* adjust the throttles in priority order.
*
* Either throttle may have already been activated by
* the overall power control.
*
* We rely on the overcurrent detection to inform us
* if the port is in use.
*
* - If type C not already throttled:
* * If not overcurrent, prefer to limit type C [1].
* * If in overcurrentuse:
* - limit type A first [2]
* - If necessary, limit type C [3].
* - If type A not throttled, if necessary limit it [2].
*/
if (headroom_5v < 0) {
/*
* Check whether type C is not throttled,
* and is not overcurrent.
*/
if (!((new_state & THROT_TYPE_C) || usbc_overcurrent)) {
/*
* [1] Type C not in overcurrent, throttle it.
*/
headroom_5v += PWR_C_HIGH - PWR_C_LOW;
new_state |= THROT_TYPE_C;
}
/*
* [2] If type A not already throttled, and power still
* needed, limit type A.
*/
if (!(new_state & THROT_TYPE_A) && headroom_5v < 0) {
headroom_5v += PWR_FRONT_HIGH - PWR_FRONT_LOW;
new_state |= THROT_TYPE_A;
}
/*
* [3] If still under-budget, limit type C.
* No need to check if it is already throttled or not.
*/
if (headroom_5v < 0)
new_state |= THROT_TYPE_C;
}
/*
* Turn the throttles on or off if they have changed.
*/
diff = new_state ^ current_state;
current_state = new_state;
if (diff & THROT_PROCHOT) {
int prochot = (new_state & THROT_PROCHOT) ? 0 : 1;
gpio_set_level(GPIO_EC_PROCHOT_ODL, prochot);
}
if (diff & THROT_TYPE_C) {
enum tcpc_rp_value rp = (new_state & THROT_TYPE_C) ?
TYPEC_RP_1A5 :
TYPEC_RP_3A0;
ppc_set_vbus_source_current_limit(0, rp);
tcpm_select_rp_value(0, rp);
pd_update_contract(0);
}
if (diff & THROT_TYPE_A) {
int typea_bc = (new_state & THROT_TYPE_A) ? 1 : 0;
gpio_set_level(GPIO_USB_A_LOW_PWR_OD, typea_bc);
}
hook_call_deferred(&power_monitor_data, delay);
}
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