diff options
Diffstat (limited to 'src/mainboard/lenovo/z61t/smihandler.c')
| -rw-r--r-- | src/mainboard/lenovo/z61t/smihandler.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/z61t/smihandler.c b/src/mainboard/lenovo/z61t/smihandler.c new file mode 100644 index 0000000000..ef5cfc64a2 --- /dev/null +++ b/src/mainboard/lenovo/z61t/smihandler.c @@ -0,0 +1,176 @@ +/* + * 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; +} |