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/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.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;
}
}
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