diff options
Diffstat (limited to 'src/mainboard/lenovo/x201/smihandler.c')
| -rw-r--r-- | src/mainboard/lenovo/x201/smihandler.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/x201/smihandler.c b/src/mainboard/lenovo/x201/smihandler.c new file mode 100644 index 0000000000..e99030b74a --- /dev/null +++ b/src/mainboard/lenovo/x201/smihandler.c @@ -0,0 +1,183 @@ +/* + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <arch/io.h> +#include <console/console.h> +#include <cpu/x86/smm.h> +#include "southbridge/intel/ibexpeak/nvs.h" +#include "southbridge/intel/ibexpeak/pch.h" +#include <ec/acpi/ec.h> +#include <pc80/mc146818rtc.h> +#include <ec/lenovo/h8/h8.h> +#include <delay.h> +#include "dock.h" +#include "smi.h" + +/* The southbridge SMI handler checks whether gnvs has a + * valid pointer before calling the trap handler + */ +extern global_nvs_t *gnvs; + +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) { + case SMI_DOCK_CONNECT: + ec_clr_bit(0x03, 2); + udelay(250000); + dock_connect(); + ec_set_bit(0x03, 2); + /* set dock LED to indicate status */ + ec_write(0x0c, 0x09); + ec_write(0x0c, 0x88); + break; + + case SMI_DOCK_DISCONNECT: + ec_clr_bit(0x03, 2); + dock_disconnect(); + 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_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; + case 0x18: + /* Fn-F9 key */ + case 0x27: + /* Power loss */ + case 0x50: + /* Undock Key */ + mainboard_io_trap_handler(SMI_DOCK_DISCONNECT); + break; + case 0x37: + case 0x58: + /* Dock Event */ + mainboard_io_trap_handler(SMI_DOCK_CONNECT); + break; + default: + break; + } +} + +void mainboard_smi_gpi(u32 gpi_sts) +{ + if (gpi_sts & (1 << 12)) + mainboard_smi_handle_ec_sci(); +} + +int mainboard_smi_apmc(u8 data) +{ + u16 pmbase = pci_read_config16(PCI_DEV(0, 0x1f, 0), 0x40) & 0xfffc; + u8 tmp; + + printk(BIOS_DEBUG, "%s: pmbase %04X, data %02X\n", __func__, pmbase, + data); + + if (!pmbase) + return 0; + + switch (data) { + case APM_CNT_ACPI_ENABLE: + /* use 0x1600/0x1604 to prevent races with userspace */ + ec_set_ports(0x1604, 0x1600); + /* route H8SCI to SCI */ + outw(inw(ALT_GP_SMI_EN) & ~0x1000, pmbase + ALT_GP_SMI_EN); + tmp = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xbb); + tmp &= ~0x03; + tmp |= 0x02; + pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xbb, tmp); + /* 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 H8SCI# to SMI */ + outw(inw(pmbase + ALT_GP_SMI_EN) | 0x1000, + pmbase + ALT_GP_SMI_EN); + tmp = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xbb); + tmp &= ~0x03; + tmp |= 0x01; + pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xbb, tmp); + /* discard all events, and enable attention */ + ec_write(0x80, 0x01); + break; + default: + break; + } + return 0; +} |