From 2bffa8aa8418a7029615b492c80508733bba1231 Mon Sep 17 00:00:00 2001 From: Nicolas Reinecke Date: Thu, 1 Oct 2015 15:34:37 +0200 Subject: lenovo/t420: Add new port This is based on t420s. Tested on a T420 without discrete GPU. There is no support for nvidia gpu and optimus. Signed-off-by: Nicolas Reinecke Tested-by: Iru Cai Change-Id: Ie9405966e56180ac1c43a3c5b83181ee500177c8 Reviewed-on: https://review.coreboot.org/11765 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- src/mainboard/lenovo/t420/smihandler.c | 101 +++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 src/mainboard/lenovo/t420/smihandler.c (limited to 'src/mainboard/lenovo/t420/smihandler.c') diff --git a/src/mainboard/lenovo/t420/smihandler.c b/src/mainboard/lenovo/t420/smihandler.c new file mode 100644 index 0000000000..23a98ddd83 --- /dev/null +++ b/src/mainboard/lenovo/t420/smihandler.c @@ -0,0 +1,101 @@ +/* + * 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 +#include +#include +#include +#include +#include + +#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; + } + + return 0; +} + +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); +} + +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); + } + } +} -- cgit v1.2.3