/* Copyright 2016 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. */ /* Reef board-specific configuration */ #include "adc.h" #include "adc_chip.h" #include "als.h" #include "button.h" #include "charge_manager.h" #include "charge_state.h" #include "charger.h" #include "chipset.h" #include "console.h" #include "driver/als_opt3001.h" #include "driver/accel_kionix.h" #include "driver/accel_kx022.h" #include "driver/accelgyro_bmi160.h" #include "driver/charger/bd99955.h" #include "driver/tcpm/anx74xx.h" #include "driver/tcpm/tcpci.h" #include "extpower.h" #include "gpio.h" #include "hooks.h" #include "host_command.h" #include "i2c.h" #include "keyboard_scan.h" #include "lid_switch.h" #include "math_util.h" #include "motion_sense.h" #include "motion_lid.h" #include "power.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 "timer.h" #include "uart.h" #include "usb_charge.h" #include "usb_mux.h" #include "usb_pd.h" #include "usb_pd_tcpm.h" #include "util.h" #define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args) #define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args) #define IN_ALL_SYS_PG POWER_SIGNAL_MASK(X86_ALL_SYS_PG) #define IN_PGOOD_PP3300 POWER_SIGNAL_MASK(X86_PGOOD_PP3300) #define IN_PGOOD_PP5000 POWER_SIGNAL_MASK(X86_PGOOD_PP5000) static void tcpc_alert_event(enum gpio_signal signal) { if (!gpio_get_level(GPIO_USB_PD_RST_ODL)) return; #ifdef HAS_TASK_PDCMD /* Exchange status with TCPCs */ host_command_pd_send_status(PD_CHARGE_NO_CHANGE); #endif } /* Exchange status with PD MCU. */ static void pd_mcu_interrupt(enum gpio_signal signal) { #ifdef HAS_TASK_PDCMD /* Exchange status with PD MCU to determine interrupt cause */ host_command_pd_send_status(0); #endif } /* * enable_input_devices() is called by the tablet_mode ISR, but changes the * state of GPIOs, so its definition must reside after including gpio_list. * Use DECLARE_DEFERRED to generate enable_input_devices_data. */ static void enable_input_devices(void); DECLARE_DEFERRED(enable_input_devices); void tablet_mode_interrupt(enum gpio_signal signal) { hook_call_deferred(&enable_input_devices_data, 0); } #include "gpio_list.h" /* power signal list. Must match order of enum power_signal. */ const struct power_signal_info power_signal_list[] = { {GPIO_RSMRST_L_PGOOD, 1, "RSMRST_L"}, {GPIO_PCH_SLP_S0_L, 1, "PMU_SLP_S0_N"}, {GPIO_PCH_SLP_S3_L, 1, "SLP_S3_DEASSERTED"}, {GPIO_PCH_SLP_S4_L, 1, "SLP_S4_DEASSERTED"}, {GPIO_SUSPWRNACK, 1, "SUSPWRNACK_DEASSERTED"}, {GPIO_ALL_SYS_PGOOD, 1, "ALL_SYS_PGOOD"}, {GPIO_PP3300_PG, 1, "PP3300_PG"}, {GPIO_PP5000_PG, 1, "PP5000_PG"}, }; BUILD_ASSERT(ARRAY_SIZE(power_signal_list) == POWER_SIGNAL_COUNT); /* ADC channels */ const struct adc_t adc_channels[] = { [ADC_BOARD_ID] = {"BOARD_ID", NPCX_ADC_CH2, 1, 1, 0}, }; BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT); /* PWM channels. Must be in the exactly same order as in enum pwm_channel. */ const struct pwm_t pwm_channels[] = { [PWM_CH_LED_GREEN] = { 2, PWM_CONFIG_DSLEEP, 100 }, [PWM_CH_LED_RED] = { 3, PWM_CONFIG_DSLEEP, 100 }, }; BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT); const struct i2c_port_t i2c_ports[] = { {"tcpc0", NPCX_I2C_PORT0_0, 400, GPIO_EC_I2C_USB_C0_PD_SCL, GPIO_EC_I2C_USB_C0_PD_SDA}, {"tcpc1", NPCX_I2C_PORT0_1, 400, GPIO_EC_I2C_USB_C1_PD_SCL, GPIO_EC_I2C_USB_C1_PD_SDA}, {"gyro", I2C_PORT_GYRO, 400, GPIO_EC_I2C_GYRO_SCL, GPIO_EC_I2C_GYRO_SDA}, {"sensors", NPCX_I2C_PORT2, 400, GPIO_EC_I2C_SENSOR_SCL, GPIO_EC_I2C_SENSOR_SDA}, {"batt", NPCX_I2C_PORT3, 100, GPIO_EC_I2C_POWER_SCL, GPIO_EC_I2C_POWER_SDA}, }; const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports); const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_COUNT] = { {NPCX_I2C_PORT0_0, 0x50, &anx74xx_tcpm_drv}, {NPCX_I2C_PORT0_1, 0x16, &tcpci_tcpm_drv}, }; uint16_t tcpc_get_alert_status(void) { uint16_t status = 0; if (gpio_get_level(GPIO_USB_C0_PD_INT)) status |= PD_STATUS_TCPC_ALERT_0; if (!gpio_get_level(GPIO_USB_C1_PD_INT_ODL)) status |= PD_STATUS_TCPC_ALERT_1; return status; } const enum gpio_signal hibernate_wake_pins[] = { GPIO_LID_OPEN, GPIO_POWER_BUTTON_L, }; const int hibernate_wake_pins_used = ARRAY_SIZE(hibernate_wake_pins); struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_COUNT] = { { .port_addr = 0, /* don't care / unused */ .driver = &anx74xx_tcpm_usb_mux_driver, }, { .port_addr = 1, .driver = &tcpci_tcpm_usb_mux_driver, } }; /* called from anx74xx_set_power_mode() */ void board_set_tcpc_power_mode(int port, int mode) { gpio_set_level(GPIO_EN_USB_TCPC_PWR, mode); msleep(1); /* FIXME(dhendrix): This is also connected to the PS8751 which * we might not want to reset just because something happened * on the ANX3429. */ gpio_set_level(GPIO_USB_PD_RST_ODL, mode); msleep(10); } /** * Reset PD MCU -- currently only called from handle_pending_reboot() in * common/power.c just before hard resetting the system. This logic is likely * not needed as the PP3300_A rail should be dropped on EC reset. */ void board_reset_pd_mcu(void) { gpio_set_level(GPIO_USB_PD_RST_ODL, 0); msleep(1); gpio_set_level(GPIO_EN_USB_TCPC_PWR, 0); msleep(10); gpio_set_level(GPIO_EN_USB_TCPC_PWR, 1); msleep(1); gpio_set_level(GPIO_USB_PD_RST_ODL, 1); /* * ANX7688 needed 50ms to release RESET_N, but the ANX7428 datasheet * does not indicate such a long delay is necessary. Leave it in due * to paranoia. */ msleep(50); } int board_get_battery_temp(int idx, int *temp_ptr) { /* FIXME(dhendrix): Read THERM_VAL from BD99956 and convert Celsius to Kelvin */ *temp_ptr = 0; return 0; } int board_get_charger_temp(int idx, int *temp_ptr) { int raw_val = adc_read_channel(NPCX_ADC_CH0); if (raw_val < 0) return -1; /* FIXME(dhendrix): Add data points and calculate using CL:344781 */ *temp_ptr = 0; return 0; } int board_get_ambient_temp(int idx, int *temp_ptr) { int raw_val = adc_read_channel(NPCX_ADC_CH1); if (raw_val < 0) return -1; /* FIXME(dhendrix): Add data points and calculate using CL:344781 */ *temp_ptr = 0; return 0; } const struct temp_sensor_t temp_sensors[] = { /* FIXME(dhendrix): tweak action_delay_sec */ {"Battery", TEMP_SENSOR_TYPE_BATTERY, board_get_battery_temp, 0, 1}, {"Ambient", TEMP_SENSOR_TYPE_BOARD, board_get_ambient_temp, 0, 5}, {"Charger", TEMP_SENSOR_TYPE_BOARD, board_get_charger_temp, 0, 1}, }; BUILD_ASSERT(ARRAY_SIZE(temp_sensors) == TEMP_SENSOR_COUNT); /* * Thermal limits for each temp sensor. All temps are in degrees K. Must be in * same order as enum temp_sensor_id. To always ignore any temp, use 0. */ struct ec_thermal_config thermal_params[] = { /* {Twarn, Thigh, Thalt}, fan_off, fan_max */ /* FIXME(dhendrix): Implement this... */ {{0, 0, 0}, 0, 0}, /* Battery */ {{0, 0, 0}, 0, 0}, /* Ambient */ {{0, 0, 0}, 0, 0}, /* Charger */ }; BUILD_ASSERT(ARRAY_SIZE(thermal_params) == TEMP_SENSOR_COUNT); /* ALS instances. Must be in same order as enum als_id. */ struct als_t als[] = { /* FIXME(dhendrix): verify attenuation_factor */ {"TI", opt3001_init, opt3001_read_lux, 5}, }; BUILD_ASSERT(ARRAY_SIZE(als) == ALS_COUNT); const struct button_config buttons[CONFIG_BUTTON_COUNT] = { {"Volume Down", KEYBOARD_BUTTON_VOLUME_DOWN, GPIO_EC_VOLDN_BTN_L, 30 * MSEC, 0}, {"Volume Up", KEYBOARD_BUTTON_VOLUME_UP, GPIO_EC_VOLUP_BTN_L, 30 * MSEC, 0}, }; /* Called by APL power state machine when transitioning from G3 to S5 */ static void chipset_pre_init(void) { #if 0 /* No need to re-init PMIC since settings are sticky across sysjump */ /* TODO(dhendrix): Handle sysjump case appropriately */ if (system_jumped_to_this_image()) return; #endif /* Enable PP5000 before PP3300 due to NFC: chrome-os-partner:50807 */ gpio_set_level(GPIO_EN_PP5000, 1); udelay(6); /* Double the PG low to high delay for power supply. */ /* Enable 3.3V rail */ gpio_set_level(GPIO_EN_PP3300, 1); udelay(1500); /* Double the PG low to high delay for converter. */ /* Enable PMIC */ gpio_set_level(GPIO_V5A_EN, 1); /* FIXME: for debugging */ cprintf(CC_HOOK, "PP3300_PG: %d", gpio_get_level(GPIO_PP3300_PG)); cprintf(CC_HOOK, "PP5000_PG: %d", gpio_get_level(GPIO_PP5000_PG)); /* (Re-)Enable I2C */ gpio_config_module(MODULE_I2C, 1); #if 0 /* Enable PD interrupts */ gpio_enable_interrupt(GPIO_USB_C0_PD_INT); gpio_enable_interrupt(GPIO_USB_C1_PD_INT_ODL); /* Enable charger interrupts */ gpio_enable_interrupt(GPIO_PD_MCU_INT); #endif } DECLARE_HOOK(HOOK_CHIPSET_PRE_INIT, chipset_pre_init, HOOK_PRIO_DEFAULT); /* Initialize board. */ static void board_init(void) { /* FIXME: Handle tablet mode */ /* gpio_enable_interrupt(GPIO_TABLET_MODE_L); */ struct charge_port_info charge_none; int i; /* Initialize all BC1.2 charge suppliers to 0 */ charge_none.voltage = USB_CHARGER_VOLTAGE_MV; charge_none.current = 0; /* TODO: Implement BC1.2 + VBUS detection */ for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) { charge_manager_update_charge(CHARGE_SUPPLIER_PROPRIETARY, i, &charge_none); charge_manager_update_charge(CHARGE_SUPPLIER_BC12_CDP, i, &charge_none); charge_manager_update_charge(CHARGE_SUPPLIER_BC12_DCP, i, &charge_none); charge_manager_update_charge(CHARGE_SUPPLIER_BC12_SDP, i, &charge_none); charge_manager_update_charge(CHARGE_SUPPLIER_OTHER, i, &charge_none); charge_manager_update_charge(CHARGE_SUPPLIER_VBUS, i, &charge_none); } } DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT); /** * Set active charge port -- only one port can be active at a time. * * @param charge_port Charge port to enable. * * Returns EC_SUCCESS if charge port is accepted and made active, * EC_ERROR_* otherwise. */ int board_set_active_charge_port(int charge_port) { enum bd99955_charge_port bd99955_port; /* charge port is a physical port */ int is_real_port = (charge_port >= 0 && charge_port < CONFIG_USB_PD_PORT_COUNT); /* check if we are source VBUS on the port */ int source = gpio_get_level(charge_port == 0 ? GPIO_USB_C0_5V_EN : GPIO_USB_C1_5V_EN); if (is_real_port && source) { CPRINTF("Skip enable p%d", charge_port); return EC_ERROR_INVAL; } CPRINTS("New chg p%d", charge_port); switch (charge_port) { case 0: bd99955_port = BD99955_CHARGE_PORT_VBUS; break; case 1: bd99955_port = BD99955_CHARGE_PORT_VCC; break; case CHARGE_PORT_NONE: bd99955_port = BD99955_CHARGE_PORT_NONE; break; default: panic("Invalid charge port\n"); break; } return bd99955_select_input_port(bd99955_port); } /** * Set the charge limit based upon desired maximum. * * @param port Port number. * @param supplier Charge supplier type. * @param charge_ma Desired charge limit (mA). */ void board_set_charge_limit(int port, int supplier, int charge_ma) { charge_set_input_current_limit(MAX(charge_ma, CONFIG_CHARGER_INPUT_CURRENT)); } int extpower_is_present(void) { return bd99955_extpower_is_present(); } int usb_charger_port_is_sourcing_vbus(int port) { return gpio_get_level(port ? GPIO_USB_C1_5V_EN : GPIO_USB_C0_5V_EN); } /* Enable or disable input devices, based upon chipset state and tablet mode */ static void enable_input_devices(void) { int kb_enable = 1; /* Disable KB if chipset is off */ if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) kb_enable = 0; keyboard_scan_enable(kb_enable, KB_SCAN_DISABLE_LID_ANGLE); } /* Called on AP S5 -> S3 transition */ static void board_chipset_startup(void) { static int need_to_enable_sleep_interrupt = 1; /* * SLP_Sn signals may be glitchy before V5A and PMIC are both on * so wait until we're exiting S5 to enable SLP_Sn interrupts. * See chrome-os-partner:51323 for details. */ if (need_to_enable_sleep_interrupt) { gpio_enable_interrupt(GPIO_PCH_SLP_S4_L); gpio_enable_interrupt(GPIO_PCH_SLP_S3_L); gpio_enable_interrupt(GPIO_PCH_SLP_S0_L); need_to_enable_sleep_interrupt = 0; } /* Enable USB-A port. */ gpio_set_level(GPIO_EN_USB_A_5V, 1); hook_call_deferred(&enable_input_devices_data, 0); } DECLARE_HOOK(HOOK_CHIPSET_STARTUP, board_chipset_startup, HOOK_PRIO_DEFAULT); /* Called on AP S3 -> S5 transition */ static void board_chipset_shutdown(void) { /* Disable USB-A port. */ gpio_set_level(GPIO_EN_USB_A_5V, 1); hook_call_deferred(&enable_input_devices_data, 0); /* FIXME(dhendrix): Drive USB_PD_RST_ODL low to prevent leakage? (see comment in schematic) */ } DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, board_chipset_shutdown, HOOK_PRIO_DEFAULT); /* FIXME(dhendrix): Add CHIPSET_RESUME and CHIPSET_SUSPEND hooks to enable/disable sensors? */ /* * FIXME(dhendrix): Weak symbol hack until we can get a better solution for * both Amenia and Reef. */ void chipset_do_shutdown(void) { cprintf(CC_CHIPSET, "Doing custom shutdown for Reef\n"); /* Disable I2C module */ gpio_config_module(MODULE_I2C, 0); gpio_set_level(GPIO_EN_USB_TCPC_PWR, 0); /* Disable V5A which de-assert PMIC_EN and causes PMIC to shutdown. */ gpio_set_level(GPIO_V5A_EN, 0); gpio_set_level(GPIO_EN_PP3300, 0); gpio_set_level(GPIO_EN_PP5000, 0); } void board_set_gpio_hibernate_state(void) { int i; const uint32_t hibernate_pins[][2] = { #if 0 /* Turn off LEDs in hibernate */ {GPIO_BAT_LED_BLUE, GPIO_INPUT | GPIO_PULL_UP}, {GPIO_BAT_LED_AMBER, GPIO_INPUT | GPIO_PULL_UP}, /* * Set PD wake low so that it toggles high to generate a wake * event once we leave hibernate. */ {GPIO_USB_PD_WAKE, GPIO_OUTPUT | GPIO_LOW}, #endif /* * In hibernate, this pin connected to GND. Set it to output * low to eliminate the current caused by internal pull-up. */ /* FIXME(dhendrix): What do to with PROCHOT? */ /* {GPIO_PLATFORM_EC_PROCHOT, GPIO_OUTPUT | GPIO_LOW}, */ /* * BD99956 handles charge input automatically. We'll disable * charge output in hibernate. Charger will assert ACOK_OD * when VBUS or VCC are plugged in. */ {GPIO_USB_C0_5V_EN, GPIO_INPUT | GPIO_PULL_DOWN}, {GPIO_USB_C1_5V_EN, GPIO_INPUT | GPIO_PULL_DOWN}, }; /* Change GPIOs' state in hibernate for better power consumption */ for (i = 0; i < ARRAY_SIZE(hibernate_pins); ++i) gpio_set_flags(hibernate_pins[i][0], hibernate_pins[i][1]); gpio_config_module(MODULE_KEYBOARD_SCAN, 0); /* * Calling gpio_config_module sets disabled alternate function pins to * GPIO_INPUT. But to prevent keypresses causing leakage currents * while hibernating we want to enable GPIO_PULL_UP as well. */ gpio_set_flags_by_mask(0x2, 0x03, GPIO_INPUT | GPIO_PULL_UP); gpio_set_flags_by_mask(0x1, 0xFF, GPIO_INPUT | GPIO_PULL_UP); gpio_set_flags_by_mask(0x0, 0xE0, GPIO_INPUT | GPIO_PULL_UP); } /* Motion sensors */ /* Mutexes */ static struct mutex g_lid_mutex; static struct mutex g_base_mutex; /* Matrix to rotate accelrator into standard reference frame */ const matrix_3x3_t base_standard_ref = { { 0, FLOAT_TO_FP(1), 0}, { FLOAT_TO_FP(-1), 0, 0}, { 0, 0, FLOAT_TO_FP(1)} }; /* KX022 private data */ struct kionix_accel_data g_kx022_data = { .variant = KX022, }; /* FIXME(dhendrix): Copied from Amenia, probably need to tweak for Reef */ struct motion_sensor_t motion_sensors[] = { /* * Note: bmi160: supports accelerometer and gyro sensor * Requirement: accelerometer sensor must init before gyro sensor * DO NOT change the order of the following table. */ [LID_ACCEL] = { .name = "Lid Accel", .active_mask = SENSOR_ACTIVE_S0, .chip = MOTIONSENSE_CHIP_BMI160, .type = MOTIONSENSE_TYPE_ACCEL, .location = MOTIONSENSE_LOC_LID, .drv = &bmi160_drv, .mutex = &g_lid_mutex, .drv_data = &g_bmi160_data, .port = I2C_PORT_ACCEL, .addr = BMI160_ADDR0, .rot_standard_ref = NULL, /* Identity matrix. */ .default_range = 2, /* g, enough for laptop. */ .config = { /* AP: by default use EC settings */ [SENSOR_CONFIG_AP] = { .odr = 10000 | ROUND_UP_FLAG, .ec_rate = 100 * MSEC, }, /* EC use accel for angle detection */ [SENSOR_CONFIG_EC_S0] = { .odr = 10000 | ROUND_UP_FLAG, .ec_rate = 100 * MSEC, }, /* Sensor off in S3/S5 */ [SENSOR_CONFIG_EC_S3] = { .odr = 0, .ec_rate = 0 }, /* Sensor off in S3/S5 */ [SENSOR_CONFIG_EC_S5] = { .odr = 0, .ec_rate = 0 }, }, }, [LID_GYRO] = { .name = "Lid Gyro", .active_mask = SENSOR_ACTIVE_S0, .chip = MOTIONSENSE_CHIP_BMI160, .type = MOTIONSENSE_TYPE_GYRO, .location = MOTIONSENSE_LOC_LID, .drv = &bmi160_drv, .mutex = &g_lid_mutex, .drv_data = &g_bmi160_data, .port = I2C_PORT_GYRO, .addr = BMI160_ADDR0, .default_range = 1000, /* dps */ .rot_standard_ref = NULL, /* Identity Matrix. */ .config = { /* AP: by default shutdown all sensors */ [SENSOR_CONFIG_AP] = { .odr = 0, .ec_rate = 0, }, /* EC does not need in S0 */ [SENSOR_CONFIG_EC_S0] = { .odr = 0, .ec_rate = 0, }, /* Sensor off in S3/S5 */ [SENSOR_CONFIG_EC_S3] = { .odr = 0, .ec_rate = 0, }, /* Sensor off in S3/S5 */ [SENSOR_CONFIG_EC_S5] = { .odr = 0, .ec_rate = 0, }, }, }, [LID_MAG] = { .name = "Lid Mag", .active_mask = SENSOR_ACTIVE_S0, .chip = MOTIONSENSE_CHIP_BMI160, .type = MOTIONSENSE_TYPE_MAG, .location = MOTIONSENSE_LOC_LID, .drv = &bmi160_drv, .mutex = &g_lid_mutex, .drv_data = &g_bmi160_data, .port = I2C_PORT_ACCEL, .addr = BMI160_ADDR0, .default_range = 1 << 11, /* 16LSB / uT, fixed */ .rot_standard_ref = NULL, /* Identity Matrix. */ .config = { /* AP: by default shutdown all sensors */ [SENSOR_CONFIG_AP] = { .odr = 0, .ec_rate = 0, }, /* EC does not need in S0 */ [SENSOR_CONFIG_EC_S0] = { .odr = 0, .ec_rate = 0, }, /* Sensor off in S3/S5 */ [SENSOR_CONFIG_EC_S3] = { .odr = 0, .ec_rate = 0, }, /* Sensor off in S3/S5 */ [SENSOR_CONFIG_EC_S5] = { .odr = 0, .ec_rate = 0, }, }, }, [BASE_ACCEL] = { .name = "Base Accel", .active_mask = SENSOR_ACTIVE_S0, .chip = MOTIONSENSE_CHIP_KXCJ9, .type = MOTIONSENSE_TYPE_ACCEL, .location = MOTIONSENSE_LOC_BASE, .drv = &kionix_accel_drv, .mutex = &g_base_mutex, .drv_data = &g_kx022_data, .port = I2C_PORT_ACCEL, .addr = KXCJ9_ADDR1, .rot_standard_ref = &base_standard_ref, /* Identity matrix. */ .default_range = 2, /* g, enough for laptop. */ .config = { /* AP: by default use EC settings */ [SENSOR_CONFIG_AP] = { .odr = 10000 | ROUND_UP_FLAG, .ec_rate = 100 * MSEC, }, /* EC use accel for angle detection */ [SENSOR_CONFIG_EC_S0] = { .odr = 10000 | ROUND_UP_FLAG, .ec_rate = 100 * MSEC, }, /* unused */ [SENSOR_CONFIG_EC_S3] = { .odr = 0, .ec_rate = 0, }, [SENSOR_CONFIG_EC_S5] = { .odr = 0, .ec_rate = 0, }, }, }, }; const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors); void board_hibernate(void) { CPRINTS("Enter Pseudo G3"); /* * Clean up the UART buffer and prevent any unwanted garbage characters * before power off and also ensure above debug message is printed. */ cflush(); /* FIXME(dhendrix): What to do here? EC is always on so we need to * turn off whatever can be turned off. */ } enum reef_board_version { BOARD_VERSION_UNKNOWN = -1, BOARD_VERSION_1, BOARD_VERSION_2, BOARD_VERSION_3, BOARD_VERSION_4, BOARD_VERSION_5, BOARD_VERSION_6, BOARD_VERSION_7, BOARD_VERSION_8, BOARD_VERSION_COUNT, }; struct { enum reef_board_version version; int thresh_mv; } const reef_board_versions[] = { { BOARD_VERSION_1, 330 }, /* 5.11 Kohm */ { BOARD_VERSION_2, 670 }, /* 11.8 Kohm */ { BOARD_VERSION_3, 1010 }, /* 20.5 Kohm */ { BOARD_VERSION_4, 1390 }, /* 32.4 Kohm */ { BOARD_VERSION_5, 1690 }, /* 48.7 Kohm */ { BOARD_VERSION_6, 2020 }, /* 73.2 Kohm */ { BOARD_VERSION_7, 2350 }, /* 115 Kohm */ { BOARD_VERSION_8, 2800 }, /* 261 Kohm */ }; BUILD_ASSERT(ARRAY_SIZE(reef_board_versions) == BOARD_VERSION_COUNT); int board_get_version(void) { static int version = BOARD_VERSION_UNKNOWN; int mv, i; if (version != BOARD_VERSION_UNKNOWN) return version; /* FIXME(dhendrix): enable ADC */ gpio_set_flags(GPIO_EC_BRD_ID_EN_ODL, GPIO_ODR_HIGH); gpio_set_level(GPIO_EC_BRD_ID_EN_ODL, 0); /* Wait to allow cap charge */ msleep(1); mv = adc_read_channel(ADC_BOARD_ID); /* FIXME(dhendrix): disable ADC */ gpio_set_level(GPIO_EC_BRD_ID_EN_ODL, 1); gpio_set_flags(GPIO_EC_BRD_ID_EN_ODL, GPIO_INPUT); if (mv == ADC_READ_ERROR) { version = BOARD_VERSION_UNKNOWN; return version; } for (i = 0; i < BOARD_VERSION_COUNT; i++) { if (mv < reef_board_versions[i].thresh_mv) { version = reef_board_versions[i].version; break; } } return version; }