| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #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 = 0x7ff; |
| 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 = 0x7ff; |
| 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 |
| }; |