/* * 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); } } }