/* SPDX-License-Identifier: GPL-2.0-only */ #include <console/console.h> #include <device/device.h> #include <ec/acpi/ec.h> #include "chip.h" #define KBC_TIMEOUT_US 1000000 // 1s /* * kbc1126_thermal_init: initialize fan control * The code is found in EcThermalInit of the vendor firmware. */ static int kbc1126_thermal_init(u8 cmd, u8 value) { printk(BIOS_DEBUG, "KBC1126: initialize fan control.\n"); if (send_ec_command_timeout(cmd, KBC_TIMEOUT_US) < 0) return -1; if (send_ec_data_timeout(0x27, KBC_TIMEOUT_US) < 0) return -1; if (send_ec_data_timeout(0x01, KBC_TIMEOUT_US) < 0) return -1; /* * The following code is needed for fan control when AC is plugged in. */ if (send_ec_command_timeout(cmd, KBC_TIMEOUT_US) < 0) return -1; if (send_ec_data_timeout(0xd5, KBC_TIMEOUT_US) < 0) return -1; if (send_ec_data_timeout(value, KBC_TIMEOUT_US) < 0) return -1; printk(BIOS_DEBUG, "KBC1126: fan control initialized.\n"); return 0; } /* * kbc1126_kbd_led: set CapsLock and NumLock LEDs * This is used in MemoryErrorReport of the vendor firmware. */ static void kbc1126_kbd_led(u8 cmd, u8 val) { if (send_ec_command_timeout(cmd, KBC_TIMEOUT_US) < 0) return; if (send_ec_data_timeout(0xf0, KBC_TIMEOUT_US) < 0) return; if (send_ec_data_timeout(val, KBC_TIMEOUT_US) < 0) return; } static void kbc1126_enable(struct device *dev) { struct ec_hp_kbc1126_config *conf = dev->chip_info; ec_set_ports(conf->ec_cmd_port, conf->ec_data_port); kbc1126_kbd_led(conf->ec_ctrl_reg, 0); if (kbc1126_thermal_init(conf->ec_ctrl_reg, conf->ec_fan_ctrl_value) < 0) printk(BIOS_DEBUG, "KBC1126: error when initializing fan control.\n"); } struct chip_operations ec_hp_kbc1126_ops = { .name = "SMSC KBC1126 for HP laptops", .enable_dev = kbc1126_enable };