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/* 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
};
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