genesis: add initial genesis EC firmware

Genesis is similar to Ambassador, so the starting point for its firmware
is a copy of Ambassador's firmware.

BUG=b:173566595
TEST=None/doesn't boot due to power differences
BRANCH=None

Change-Id: I6de3c9ae83f58c21bf5588817cfde02c7ef1247a
Signed-off-by: Matt Ziegelbaum <ziegs@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2552226
Reviewed-by: Joe Tessler <jrt@chromium.org>

1 files changed, 938 insertions, 0 deletions

diff --git a/board/genesis/board.c b/board/genesis/board.c
new file mode 100644
index 0000000000..fd6c045d4d
--- /dev/null
+++ b/board/genesis/board.c
@@ -0,0 +1,938 @@
+/* Copyright 2020 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 "adc_chip.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 "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_CHARGE_MANAGER_INIT + 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_OPEN_DRAIN |
+					 PWM_CONFIG_DSLEEP,
+				.freq = 2000 },
+	[PWM_CH_LED_WHITE]  = { .channel = 2,
+				.flags = PWM_CONFIG_OPEN_DRAIN |
+					 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[] = {
+	{"ina",     I2C_PORT_INA,     400, GPIO_I2C0_SCL, GPIO_I2C0_SDA},
+	{"ppc0",    I2C_PORT_PPC0,    400, GPIO_I2C1_SCL, GPIO_I2C1_SDA},
+	{"tcpc0",   I2C_PORT_TCPC0,   400, GPIO_I2C3_SCL, GPIO_I2C3_SDA},
+	{"power",   I2C_PORT_POWER,   400, GPIO_I2C5_SCL, GPIO_I2C5_SDA},
+	{"eeprom",  I2C_PORT_EEPROM,  400, GPIO_I2C7_SCL, 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. */
+const static struct ec_thermal_config 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),
+};
+
+const static struct ec_thermal_config 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,
+	},
+};
+
+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(GPIO_EC_RECOVERY_BTN_ODL);
+}
+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);
+}