From cee930a39b183260ea83ac72fc9ca59d61353d8d Mon Sep 17 00:00:00 2001 From: Tobias Diedrich Date: Sun, 12 Feb 2017 14:09:06 +0100 Subject: lenovo/s230u: Add Thinkpad Twist (S230U) Created using autoport plus some manual work and copying from G505S to account for the non-H8 EC. This model uses the same ENE KB9012 EC as the G505S. Tested: - Mainboard variant with 8GB Elpida DDR3 - SeaBIOS payload - Booting into Linux 4.9.6 with Debian/unstable installed on the internal HDD/SDD slot - Native raminit - Both native VGA init and option rom VGA init - Basic TPM functionality (auto-detection and RNG) - Battery status readout - Basic ACPI functions (power button event; power-off; reboot) - thinkpad-acpi hotkey functions - thinkpad-acpi LED control (red thinkpad LED) - Suspend to RAM and resume works - Mini displayport output works Known issues: - Patches needed for EC battery support https://review.coreboot.org/#/c/18348/ https://review.coreboot.org/#/c/18349/ - No thermal zone since temperature sensing is not H8-compatible and needs to be reverse engineered. Not tested: - msata/wwan (probably works) Signed-off-by: Tobias Diedrich Change-Id: I52bc4515277e5c18afbb14a80a9ac788049f485c Reviewed-on: https://review.coreboot.org/18351 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Rudolph --- src/mainboard/lenovo/s230u/ec.c | 49 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/mainboard/lenovo/s230u/ec.c (limited to 'src/mainboard/lenovo/s230u/ec.c') diff --git a/src/mainboard/lenovo/s230u/ec.c b/src/mainboard/lenovo/s230u/ec.c new file mode 100644 index 0000000000..f3e01b68be --- /dev/null +++ b/src/mainboard/lenovo/s230u/ec.c @@ -0,0 +1,49 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Alexandru Gagniuc + * + * 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 "ec.h" +#include + +/* The keyboard matrix tells the EC how the keyboard is wired internally */ +static void set_keyboard_matrix_us(void) +{ + ec_kbc_write_cmd(0x59); + ec_kbc_write_ib(0xE5); +} + +/* Tell EC to operate in APM mode. Events generate SMIs instead of SCIs */ +static void enter_apm_mode(void) +{ + ec_kbc_write_cmd(0x59); + ec_kbc_write_ib(0xE9); +} + +void lenovo_s230u_ec_init(void) +{ + set_keyboard_matrix_us(); + + /* + * The EC has a special "blinking Caps Lock LED" mode which it normally + * enters when it believes the OS is not responding. It occasionally + * disables battery charging when in this mode, although other + * functionality is unaffected. Although the EC starts in APM mode by + * default, it only leaves the "blinking Caps Lock LED" mode after + * receiving the following command. + */ + enter_apm_mode(); + + /* Enable external USB port power. */ + ec_mm_set_bit(0x3b, 4); +} -- cgit v1.2.3