smihandler.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <arch/io.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <southbridge/intel/i82801gx/i82801gx.h>
#include <soc/nvs.h>
#include <southbridge/intel/common/gpio.h>
#include <ec/acpi/ec.h>
#include "ec_oem.c"
 
#define MAX_LCD_BRIGHTNESS 0xd8
 
int mainboard_io_trap_handler(int smif)
{
        u8 reg8;
        u32 reg32;
 
        switch (smif) {
        case 0x2b:
                printk(BIOS_DEBUG, "CPU power state switch\n");
                // TODO, move to CPU handler?
                break;
        case 0x3d:
                printk(BIOS_DEBUG, "Enable C-State SMM coordination\n");
                // TODO, move to CPU handler?
                break;
        case 0x46:
                printk(BIOS_DEBUG, "S3 DTS SMI (completely re-enable DTS)\n");
                // TODO, move to CPU handler?
                break;
        case 0x47:
                printk(BIOS_DEBUG, "S4 DTS SMI (Update NVS DTS temperature)\n");
                // TODO, move to CPU handler?
                break;
        case 0xc0:
                printk(BIOS_DEBUG, "Disable RF\n");
                // TODO
                break;
        case 0xd0:
                printk(BIOS_DEBUG, "ACBS LAN Power on\n");
                // TODO
                break;
        case 0xd1:
                printk(BIOS_DEBUG, "ACBS LAN Power off\n");
                // TODO
                break;
        case 0xd2:
                printk(BIOS_DEBUG, "Check AC status\n");
                // TODO
                break;
        case 0xd3:
                printk(BIOS_DEBUG, "Enable Bluetooth\n");
                // TODO
                break;
        case 0xd4:
                printk(BIOS_DEBUG, "Disable Bluetooth\n");
                // TODO
                break;
        case 0xd5:
                printk(BIOS_DEBUG, "Set Brightness\n");
                reg8 = gnvs->brtl;
                printk(BIOS_DEBUG, "brtl: %x\n", reg8);
                ec_write(0x17, reg8);
                break;
        case 0xd6:
                printk(BIOS_DEBUG, "Get Brightness\n");
                reg8 = ec_read(0x17);
                printk(BIOS_DEBUG, "brtl: %x\n", reg8);
                gnvs->brtl = reg8;
                break;
        case 0xd7:
                printk(BIOS_DEBUG, "Get ECO mode status\n");
                // TODO
                break;
        case 0xd8:
                printk(BIOS_DEBUG, "Get sunlight readable status\n");
                // TODO
                break;
        case 0xd9:
                printk(BIOS_DEBUG, "Get docking connection\n");
                // TODO
                break;
        case 0xda:
                printk(BIOS_DEBUG, "Power off docking\n");
                // TODO
                break;
        case 0xdc:
                printk(BIOS_DEBUG, "EC: Turn on LED on ECO enable\n");
                // TODO
                break;
        case 0xdd:
                printk(BIOS_DEBUG, "EC: Turn off LED on ECO disable\n");
                // TODO
                break;
        case 0xde:
                printk(BIOS_DEBUG, "LAN power off\n");
                reg32 = inl(DEFAULT_GPIOBASE + GP_LVL);
                reg32 |= (1 << 24);                     // Disable LAN Power
                outl(reg32, DEFAULT_GPIOBASE + GP_LVL);
                break;
        case 0xdf:
                printk(BIOS_DEBUG, "RF enable\n");
                // TODO
                break;
        case 0xe0:
                printk(BIOS_DEBUG, "Get RTC wake flag\n");
                // TODO
                break;
        case 0xe1:
                printk(BIOS_DEBUG, "Hotkey function\n");
                // TODO
                break;
        case 0xe3:
                printk(BIOS_DEBUG, "ECO disable\n");
                // TODO
                break;
        default:
                return 0;
        }
 
        /* gnvs->smif:
         *   On success, the IO Trap Handler returns 0
         *   On failure, the IO Trap Handler returns a value != 0
         */
        gnvs->smif = 0;
        return 1;
}
 
static void mainboard_smi_hotkey(u8 hotkey)
{
        u8 reg8;
 
        switch (hotkey) {
        case 0x3b: break; // Fn+F1
        case 0x3c: break; // Fn+F2
        case 0x3d: break; // Fn+F3
        case 0x3e: break; // Fn+F4
        case 0x3f: break; // Fn+F5
        case 0x40:        // Fn+F6 (Decrease Display Brightness)
                   reg8 = ec_read(0x17);
                   reg8 = (reg8 > 8) ? (reg8 - 8) : 0;
                   ec_write(0x17, reg8);
                   return;
        case 0x41:        // Fn+F7 (Increase Display Brightness)
                   reg8 = ec_read(0x17);
                   reg8 += 8;
                   reg8 = (reg8 >= MAX_LCD_BRIGHTNESS) ? MAX_LCD_BRIGHTNESS : reg8;
                   ec_write(0x17, reg8);
                   return;
        case 0x42: break; // Fn+F8
        case 0x43: break; // Fn+F9
        case 0x44: break; // Fn+F10
        case 0x57: break; // Fn+F11
        case 0x58: break; // Fn+F12
        }
        printk(BIOS_DEBUG, "EC hotkey: %02x\n", hotkey);
}
 
void mainboard_smi_gpi(u32 gpi_sts)
{
        u8 source, hotkey;
        send_ec_oem_command(0x5c);
        source = recv_ec_oem_data();
 
        switch (source) {
        case 0:
                // Some kind of ACK?
                break;
        case 1:
                send_ec_oem_command(0x59);
                hotkey = recv_ec_oem_data();
                mainboard_smi_hotkey(hotkey);
                break;
        default:
                printk(BIOS_DEBUG, "EC SMI source: %02x\n", source);
        }
}