/* SPDX-License-Identifier: GPL-2.0-only */ #include #include #include #include #include #include "ec.h" #include "chip.h" typedef struct ec_kontron_it8516e_config config_t; enum { /* EC commands */ IT8516E_CMD_SET_SYSTEMP_TYPE = 0x06, IT8516E_CMD_GET_SYSTEMP_TYPE = 0x07, IT8516E_CMD_GET_FAN_MODE = 0x10, IT8516E_CMD_SET_FAN_MODE = 0x11, IT8516E_CMD_GET_FAN_PWM = 0x12, IT8516E_CMD_SET_FAN_PWM = 0x13, IT8516E_CMD_GET_FAN_SPEED = 0x14, IT8516E_CMD_SET_FAN_SPEED = 0x15, IT8516E_CMD_GET_FAN_TEMP = 0x16, IT8516E_CMD_SET_FAN_TEMP = 0x17, IT8516E_CMD_SET_FAN_LIMITS = 0x1a, }; /** * Sets the type of the external temperature sensor used * * @param type Type of sensor to set */ static void it8516e_set_systemp_type(const u8 type) { if (send_ec_command(IT8516E_CMD_SET_SYSTEMP_TYPE)) return; send_ec_data(type); } /** * Sets the operating mode of a fan * * @param idx Selects the fan; 0: CPU, 1: System * @param mode Mode to set */ static void it8516e_set_fan_mode(const u8 idx, const u8 mode) { if (send_ec_command(IT8516E_CMD_SET_FAN_MODE)) return; if (send_ec_data(idx)) return; send_ec_data(mode); } /** * Sets the PWM rate of a fan in IT8516E_MODE_PWM * * @param idx Selects the fan; 0: CPU, 1: System * @param pwm PWM rate measured in 255ths */ static void it8516e_set_fan_pwm(const u8 idx, const u8 pwm) { if (send_ec_command(IT8516E_CMD_SET_FAN_PWM)) return; if (send_ec_data(idx)) return; send_ec_data(pwm); } /** * Sets the target speed in RPM for a fan in IT8516E_MODE_SPEED * * @param idx Selects the fan; 0: CPU, 1: System * @param speed Speed in RPM */ static void it8516e_set_fan_speed(const u8 idx, const u16 speed) { if (send_ec_command(IT8516E_CMD_SET_FAN_SPEED)) return; if (send_ec_data(idx)) return; if (send_ec_data(speed & 0xff)) return; send_ec_data(speed >> 8); } /** * Sets the target temperature for a fan in IT8516E_MODE_THERMAL * * @param idx Selects the fan; 0: CPU, 1: System * @param temp Temperature in 64ths degree C */ static void it8516e_set_fan_temperature(const u8 idx, const u16 temp) { if (send_ec_command(IT8516E_CMD_SET_FAN_TEMP)) return; if (send_ec_data(idx)) return; if (send_ec_data(temp & 0xff)) return; send_ec_data(temp >> 8); } /** * Sets the minimum and maximum PWM rate of a fan in IT8516E_MODE_THERMAL * * @param idx Selects the fan; 0: CPU, 1: System * @param min Minimum PWM rate in % * @param max Maximum PWM rate in % */ static void it8516e_set_fan_limits(const u8 idx, const u8 min, const u8 max) { if (send_ec_command(IT8516E_CMD_SET_FAN_LIMITS)) return; if (send_ec_data(idx)) return; if (send_ec_data(min)) return; send_ec_data(max); } static void it8516e_set_fan_from_options(const config_t *const config, const u8 fan_idx) { static char fanX_mode[] = "fanX_mode"; static char fanX_target[] = "fanX_target"; static char fanX_min[] = "fanX_min"; static char fanX_max[] = "fanX_max"; u8 fan_mode = config->default_fan_mode[fan_idx]; u16 fan_target = config->default_fan_target[fan_idx]; u8 fan_min = config->default_fan_min[fan_idx]; u8 fan_max = config->default_fan_max[fan_idx]; fanX_mode[3] = '1' + fan_idx; fan_mode = get_uint_option(fanX_mode, fan_mode); if (!fan_mode) fan_mode = IT8516E_MODE_AUTO; it8516e_set_fan_mode(fan_idx, fan_mode); fanX_target[3] = '1' + fan_idx; fan_target = get_uint_option(fanX_target, fan_target); switch (fan_mode) { case IT8516E_MODE_AUTO: printk(BIOS_DEBUG, "Setting it8516e fan%d " "control to auto.\n", fan_idx + 1); break; case IT8516E_MODE_PWM: printk(BIOS_DEBUG, "Setting it8516e fan%d " "control to %d%% PWM.\n", fan_idx + 1, fan_target); if (fan_target > 100) /* Constrain to 100% */ fan_target = 100; it8516e_set_fan_pwm(fan_idx, (fan_target * 255) / 100); break; case IT8516E_MODE_SPEED: printk(BIOS_DEBUG, "Setting it8516e fan%d " "control to %d RPMs.\n", fan_idx + 1, fan_target); it8516e_set_fan_speed(fan_idx, fan_target); break; case IT8516E_MODE_THERMAL: printk(BIOS_DEBUG, "Setting it8516e fan%d control to %d C.\n", fan_idx + 1, fan_target); if (fan_target > 1024) /* Constrain to 1K */ fan_target = 1024; it8516e_set_fan_temperature(fan_idx, fan_target * 64); fanX_min[3] = '1' + fan_idx; fanX_max[3] = '1' + fan_idx; fan_min = get_uint_option(fanX_min, fan_min); fan_max = get_uint_option(fanX_max, fan_max); if (!fan_max || fan_max > 100) /* Constrain fan_max to 100% */ fan_max = 100; if (fan_min >= 100) /* Constrain fan_min to 99% */ fan_min = 99; if (fan_max <= fan_min) /* If fan_min is the higher of the two, it's safer for the hardware to keep its value. Therefore, update fan_max. */ fan_max = fan_min + 1; printk(BIOS_DEBUG, "Setting it8516e fan%d limits to %d%% - %d%% PWM.\n", fan_idx + 1, fan_min, fan_max); it8516e_set_fan_limits(fan_idx, fan_min, fan_max); break; } } static void it8516e_pm2_init(struct device *dev) { const config_t *const config = dev->chip_info; /* TODO: Set frequency / divider? */ ec_set_ports(find_resource(dev, PNP_IDX_IO1)->base, find_resource(dev, PNP_IDX_IO0)->base); u8 systemp_type = get_uint_option("systemp_type", config->default_systemp); if (systemp_type >= IT8516E_SYSTEMP_LASTPLUSONE) systemp_type = IT8516E_SYSTEMP_NONE; it8516e_set_systemp_type(systemp_type); it8516e_set_fan_from_options(config, 0); it8516e_set_fan_from_options(config, 1); } static struct device_operations it8516e_pm2_ops = { .read_resources = pnp_read_resources, .set_resources = pnp_set_resources, .enable_resources = pnp_enable_resources, .enable = pnp_enable, .init = it8516e_pm2_init }; static struct pnp_info it8516e_dev_infos[] = { { NULL, IT8516E_LDN_UART1, PNP_IO0 | PNP_IRQ0, 0x07f8, }, { NULL, IT8516E_LDN_UART2, PNP_IO0 | PNP_IRQ0, 0x07f8, }, { NULL, IT8516E_LDN_SWUC, PNP_IO0 | PNP_IRQ0, 0xffe0, }, { NULL, IT8516E_LDN_MOUSE, PNP_IRQ0, }, { NULL, IT8516E_LDN_KBD, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07ff, 0x07ff, }, { NULL, IT8516E_LDN_SMFI, PNP_IO0 | PNP_IRQ0, 0xfff0, }, { NULL, IT8516E_LDN_BRAM, PNP_IO0 | PNP_IO1, 0xfffe, 0xfffe, }, { NULL, IT8516E_LDN_PM1, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07ff, 0x07ff, }, { &it8516e_pm2_ops, IT8516E_LDN_PM2, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07ff, 0x07ff, }, { NULL, IT8516E_LDN_PM3, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07ff, 0x07ff, }, }; static void it8516e_enable(struct device *dev) { pnp_enable_devices(dev, &pnp_ops, ARRAY_SIZE(it8516e_dev_infos), it8516e_dev_infos); } const struct chip_operations ec_kontron_it8516e_ops = { .name = "Kontron (Fintec/ITE) IT8516E EC", .enable_dev = it8516e_enable };