/* * This file is part of the coreboot project. * * Copyright (C) 2008-2009 coresystems GmbH * * 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 "southbridge/intel/i82801gx/nvs.h" #include "southbridge/intel/i82801gx/i82801gx.h" #include <ec/acpi/ec.h> #include "dock.h" #include "smi.h" #define GPE_EC_SCI 12 #define LVTMA_BL_MOD_LEVEL 0x7af9 /* ATI Radeon backlight level */ static void mainboard_smm_init(void) { printk(BIOS_DEBUG, "initializing SMI\n"); /* Enable 0x1600/0x1600 register pair */ ec_set_bit(0x00, 0x05); } static void mainboard_smi_brightness_down(void) { u8 *bar; if ((bar = (u8 *)pci_read_config32(PCI_DEV(1, 0, 0), 0x18))) { printk(BIOS_DEBUG, "bar: %08X, level %02X\n", (unsigned int)bar, *(bar+LVTMA_BL_MOD_LEVEL)); *(bar+LVTMA_BL_MOD_LEVEL) &= 0xf0; if (*(bar+LVTMA_BL_MOD_LEVEL) > 0x10) *(bar+LVTMA_BL_MOD_LEVEL) -= 0x10; } } static void mainboard_smi_brightness_up(void) { u8 *bar; if ((bar = (u8 *)pci_read_config32(PCI_DEV(1, 0, 0), 0x18))) { printk(BIOS_DEBUG, "bar: %08X, level %02X\n", (unsigned int )bar, *(bar+LVTMA_BL_MOD_LEVEL)); *(bar+LVTMA_BL_MOD_LEVEL) |= 0x0f; if (*(bar+LVTMA_BL_MOD_LEVEL) < 0xf0) *(bar+LVTMA_BL_MOD_LEVEL) += 0x10; } } int mainboard_io_trap_handler(int smif) { static int smm_initialized; if (!smm_initialized) { mainboard_smm_init(); smm_initialized = 1; } switch (smif) { case SMI_DOCK_CONNECT: /* If there's an legacy I/O module present, we're not * allowed to connect the Docking LPC Bus, as both Super I/O * chips are using 0x2e as base address. */ if (legacy_io_present()) break; if (!dock_connect()) { /* set dock LED to indicate status */ ec_write(0x0c, 0x08); ec_write(0x0c, 0x89); } else { /* blink dock LED to indicate failure */ ec_write(0x0c, 0xc8); ec_write(0x0c, 0x09); } break; case SMI_DOCK_DISCONNECT: dock_disconnect(); ec_write(0x0c, 0x09); ec_write(0x0c, 0x08); break; case SMI_BRIGHTNESS_UP: mainboard_smi_brightness_up(); break; case SMI_BRIGHTNESS_DOWN: mainboard_smi_brightness_down(); break; 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_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) { /* brightness up */ case 0x14: mainboard_smi_brightness_up(); break; /* brightness down */ case 0x15: mainboard_smi_brightness_down(); break; /* Fn-F9 Key */ case 0x18: /* power loss */ case 0x27: /* undock event */ case 0x50: mainboard_io_trap_handler(SMI_DOCK_DISCONNECT); break; /* dock event */ case 0x37: mainboard_io_trap_handler(SMI_DOCK_CONNECT); break; default: break; } } void mainboard_smi_gpi(u32 gpi) { if (gpi & (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 H8SCI to SCI */ gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI); 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 H8SCI# to SMI */ gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI); break; default: break; } return 0; }