| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <delay.h> |
| #include <device/mmio.h> |
| #include <ec/acpi/ec.h> |
| #include <swab.h> |
| #include <timer.h> |
| #include <types.h> |
| |
| #include "chip.h" |
| #include "commands.h" |
| #include "ec.h" |
| |
| #define ec_cmd send_ec_command |
| #define ec_dat send_ec_data |
| |
| static void ec_fcmd(uint8_t fcmd) |
| { |
| write8p(ECRAM + FCMD, fcmd); |
| ec_cmd(ECCMD_NOP); |
| |
| /* EC sets FCMD = 0x00 on completion (FCMD = 0xfa on some commands) */ |
| int time = wait_us(50000, read8p(ECRAM + FCMD) == 0x00 || read8p(ECRAM + FCMD) == 0xfa); |
| if (time) |
| printk(BIOS_DEBUG, "EC: FCMD 0x%02x completed after %d us\n", fcmd, time); |
| else |
| printk(BIOS_ERR, "EC: FCMD 0x%02x timed out\n", fcmd); |
| } |
| |
| static void ec_recv_str(char *buf, size_t size) |
| { |
| while (size--) { |
| *buf = recv_ec_data(); |
| if (*buf == '$') { /* end mark */ |
| *buf = '\0'; |
| return; |
| } |
| buf++; |
| } |
| |
| /* Truncate and discard the rest */ |
| *--buf = '\0'; |
| do {} while (recv_ec_data() != '$'); |
| printk(BIOS_ERR, "EC: Received string longer than buffer. Data truncated.\n"); |
| } |
| |
| char *ec_read_model(void) |
| { |
| static char model[10]; |
| |
| ec_cmd(ECCMD_READ_MODEL); |
| ec_recv_str(model, sizeof(model)); |
| |
| return model; |
| } |
| |
| char *ec_read_fw_version(void) |
| { |
| static char version[10] = "1."; |
| |
| ec_cmd(ECCMD_READ_FW_VER); |
| ec_recv_str(version + 2, sizeof(version) - 2); |
| |
| return version; |
| } |
| |
| void ec_set_acpi_mode(bool state) |
| { |
| ec_cmd(state ? ECCMD_ENABLE_ACPI_MODE : ECCMD_DISABLE_ACPI_MODE); |
| if (state) |
| ec_cmd(ECCMD_ENABLE_HOTKEYS); |
| } |
| |
| void ec_set_enter_g3_in_s4s5(bool state) |
| { |
| clrsetbits8p(ECRAM + 0x1e6, 1 << G3FG, state << G3FG); |
| } |
| |
| void ec_set_aprd(void) |
| { |
| setbits8p(ECRAM + 0x1eb, 1 << APRD); |
| } |
| |
| /* To be called by a graphics driver, when detecting a dGPU */ |
| void ec_set_dgpu_present(bool state) |
| { |
| clrsetbits8p(ECRAM + 0x1eb, 1 << DGPT, state << DGPT); |
| } |
| |
| void ec_set_fn_win_swap(bool state) |
| { |
| clrsetbits8p(ECRAM + ECKS, 1 << SWFN, state << SWFN); |
| } |
| |
| void ec_set_ac_fan_always_on(bool state) |
| { |
| clrsetbits8p(ECRAM + 0x1e6, 1 << FOAC, state << FOAC); |
| } |
| |
| void ec_set_kbled_timeout(uint16_t timeout) |
| { |
| printk(BIOS_DEBUG, "EC: set keyboard backlight timeout to %us\n", timeout); |
| |
| write8p(ECRAM + FDAT, timeout ? 0xff : 0x00); |
| write16p(ECRAM + FBUF, swab16(timeout)); |
| ec_fcmd(FCMD_SET_KBLED_TIMEOUT); |
| } |
| |
| void ec_set_flexicharger(bool state, uint8_t start, uint8_t stop) |
| { |
| printk(BIOS_DEBUG, "EC: set flexicharger: enabled=%d, start=%u%%, stop=%u%%\n", |
| state, start, stop); |
| |
| if (!state) { |
| start = 0xff; |
| stop = 0xff; |
| |
| } else if (start > 100 || stop > 100) { |
| printk(BIOS_ERR, "EC: invalid flexicharger settings: start/stop > 100%%\n"); |
| return; |
| |
| } else if (start >= stop) { |
| printk(BIOS_ERR, "EC: invalid flexicharger settings: start >= stop\n"); |
| return; |
| } |
| |
| write8p(ECRAM + FBF1, state << 1); |
| write8p(ECRAM + FBUF, start); |
| write8p(ECRAM + FDAT, stop); |
| ec_fcmd(FCMD_FLEXICHARGER); |
| } |
| |
| void ec_set_camera_boot_state(enum camera_state state) |
| { |
| if (state > CAMERA_STATE_KEEP) { |
| printk(BIOS_ERR, |
| "EC: invalid camera boot state %u. Keeping previous state.\n", state); |
| state = CAMERA_STATE_KEEP; |
| } |
| |
| if (state == CAMERA_STATE_KEEP) { |
| /* |
| * The EC maintains the camera's state in RAM. However, it doesn't sync the GPIO |
| * on a concurrent boot. Thus, read the previous state from the EC and set the |
| * state and the GPIO by sending the state command even in the keep-case. |
| */ |
| ec_cmd(ECCMD_GET_DEVICES_STATE); |
| state = recv_ec_data() & 1; |
| } |
| |
| printk(BIOS_DEBUG, "EC: set camera: enabled=%u\n", state); |
| |
| ec_dat(DEVICE_CAMERA | DEVICE_STATE(state)); |
| ec_cmd(ECCMD_SET_INV_DEVICE_STATE); |
| } |
| |
| void ec_set_tp_toggle_mode(uint8_t mode) |
| { |
| switch (mode) { |
| case 0: /* CtrlAltF9 */ |
| setbits8p(ECRAM + RINF, TP_TOGGLE_CTRLALTF9); |
| break; |
| case 1: /* KeycodeF7F8*/ |
| clrbits8p(ECRAM + RINF, TP_TOGGLE_CTRLALTF9); |
| break; |
| } |
| } |