| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2008-2009 coresystems GmbH |
| * Copyright (C) 2014 Vladimir Serbinenko |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; version 2 of |
| * the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <cpu/x86/smm.h> |
| #include <ec/acpi/ec.h> |
| #include <pc80/mc146818rtc.h> |
| #include <ec/lenovo/h8/h8.h> |
| #include <delay.h> |
| #include <southbridge/intel/bd82x6x/nvs.h> |
| #include <southbridge/intel/bd82x6x/pch.h> |
| #include <southbridge/intel/bd82x6x/me.h> |
| #include <northbridge/intel/sandybridge/sandybridge.h> |
| #include <cpu/intel/model_206ax/model_206ax.h> |
| |
| #define GPE_EC_SCI 1 |
| #define GPE_EC_WAKE 13 |
| |
| static void mainboard_smm_init(void) |
| { |
| printk(BIOS_DEBUG, "initializing SMI\n"); |
| /* Enable 0x1600/0x1600 register pair */ |
| ec_set_bit(0x00, 0x05); |
| } |
| |
| int mainboard_io_trap_handler(int smif) |
| { |
| static int smm_initialized; |
| |
| if (!smm_initialized) { |
| mainboard_smm_init(); |
| smm_initialized = 1; |
| } |
| |
| switch (smif) { |
| default: |
| return 0; |
| } |
| |
| /* On success, the IO Trap Handler returns 1 |
| * On failure, the IO Trap Handler returns a value != 1 */ |
| return 1; |
| } |
| |
| static void mainboard_smi_brightness_up(void) |
| { |
| u8 value; |
| |
| if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) < 0xf0) |
| pci_write_config8(PCI_DEV(0, 2, 1), 0xf4, (value + 0x10) | 0xf); |
| } |
| |
| static void mainboard_smi_brightness_down(void) |
| { |
| u8 value; |
| |
| if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) > 0x10) |
| pci_write_config8(PCI_DEV(0, 2, 1), 0xf4, |
| (value - 0x10) & 0xf0); |
| } |
| |
| static void mainboard_smi_handle_ec_sci(void) |
| { |
| u8 status = inb(EC_SC); |
| u8 event; |
| |
| if (!(status & EC_SCI_EVT)) |
| return; |
| |
| event = ec_query(); |
| printk(BIOS_DEBUG, "EC event %02x\n", event); |
| |
| switch (event) { |
| case 0x14: |
| /* brightness up */ |
| mainboard_smi_brightness_up(); |
| break; |
| case 0x15: |
| /* brightness down */ |
| mainboard_smi_brightness_down(); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| void mainboard_smi_gpi(u32 gpi_sts) |
| { |
| if (gpi_sts & (1 << GPE_EC_SCI)) |
| mainboard_smi_handle_ec_sci(); |
| } |
| |
| int mainboard_smi_apmc(u8 data) |
| { |
| switch (data) { |
| case APM_CNT_ACPI_ENABLE: |
| /* use 0x1600/0x1604 to prevent races with userspace */ |
| ec_set_ports(0x1604, 0x1600); |
| /* route EC_SCI to SCI */ |
| gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI); |
| /* discard all events, and enable attention */ |
| ec_write(0x80, 0x01); |
| break; |
| case APM_CNT_ACPI_DISABLE: |
| /* we have to use port 0x62/0x66, as 0x1600/0x1604 doesn't |
| provide a EC query function */ |
| ec_set_ports(0x66, 0x62); |
| /* route EC_SCI to SMI */ |
| gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI); |
| /* discard all events, and enable attention */ |
| ec_write(0x80, 0x01); |
| break; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| void mainboard_smi_sleep(u8 slp_typ) |
| { |
| if (slp_typ == 3) { |
| u8 ec_wake = ec_read(0x32); |
| /* If EC wake events are enabled, enable wake on EC WAKE GPE. */ |
| if (ec_wake & 0x14) { |
| /* Redirect EC WAKE GPE to SCI. */ |
| gpi_route_interrupt(GPE_EC_WAKE, GPI_IS_SCI); |
| } |
| } |
| } |