/* SPDX-License-Identifier: GPL-2.0-only */ #include <arch/io.h> #include <console/console.h> #include <device/device.h> #include <delay.h> #include "ec.h" #include "chip.h" static u16 ec_data_port; static u16 ec_cmd_port; #define KBD_IBF (1 << 1) /* 1: input buffer full (data ready for ec) */ #define KBD_OBF (1 << 0) /* 1: output buffer full (data ready for host) */ static void ec_setports(u16 data, u16 cmd) { ec_data_port = data; ec_cmd_port = cmd; } static int send_kbd_command(u8 command) { int timeout; timeout = 100000; /* 1 second */ while ((inb(ec_cmd_port) & KBD_IBF) && --timeout) { udelay(10); if ((timeout & 0xff) == 0) printk(BIOS_SPEW, "."); } if (!timeout) { printk(BIOS_DEBUG, "Timeout while sending command 0x%02x to EC!\n", command); return -1; } outb(command, ec_cmd_port); return 0; } static int send_kbd_data(u8 data) { int timeout; timeout = 100000; /* 1 second */ while ((inb(ec_cmd_port) & KBD_IBF) && --timeout) { /* wait for IBF = 0 */ udelay(10); if ((timeout & 0xff) == 0) printk(BIOS_SPEW, "."); } if (!timeout) { printk(BIOS_DEBUG, "Timeout while sending data 0x%02x to EC!\n", data); return -1; } outb(data, ec_data_port); return 0; } /* * kbc1126_thermalinit: initialize fan control * The code is found in EcThermalInit of the vendor firmware. */ static int kbc1126_thermalinit(u8 cmd, u8 value) { printk(BIOS_DEBUG, "KBC1126: initialize fan control."); if (send_kbd_command(cmd) < 0) return -1; if (send_kbd_data(0x27) < 0) return -1; if (send_kbd_data(0x01) < 0) return -1; /* * The following code is needed for fan control when AC is plugged in. */ if (send_kbd_command(cmd) < 0) return -1; if (send_kbd_data(0xd5) < 0) return -1; if (send_kbd_data(value) < 0) return -1; printk(BIOS_DEBUG, "KBC1126: fan control initialized.\n"); return 0; } /* * kbc1126_kbdled: set CapsLock and NumLock LEDs * This is used in MemoryErrorReport of the vendor firmware. */ static void kbc1126_kbdled(u8 cmd, u8 val) { if (send_kbd_command(cmd) < 0) return; if (send_kbd_data(0xf0) < 0) return; if (send_kbd_data(val) < 0) return; } static void kbc1126_enable(struct device *dev) { struct ec_hp_kbc1126_config *conf = dev->chip_info; ec_setports(conf->ec_data_port, conf->ec_cmd_port); kbc1126_kbdled(conf->ec_ctrl_reg, 0); if (kbc1126_thermalinit(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 = { CHIP_NAME("SMSC KBC1126 for HP laptops") .enable_dev = kbc1126_enable };