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authorTobias Diedrich <ranma+openocd@tdiedrich.de>2017-02-12 14:09:06 +0100
committerMartin Roth <martinroth@google.com>2017-02-20 18:21:56 +0100
commitcee930a39b183260ea83ac72fc9ca59d61353d8d (patch)
treeb3fd18b7a202b837fc512e2b71a599956fdbbdee /src/mainboard/lenovo/s230u/ec.c
parent97535558f1a1c123a60d73244d835ff5d8d31213 (diff)
downloadcoreboot-cee930a39b183260ea83ac72fc9ca59d61353d8d.tar.xz
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 <ranma+coreboot@tdiedrich.de> Change-Id: I52bc4515277e5c18afbb14a80a9ac788049f485c Reviewed-on: https://review.coreboot.org/18351 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'src/mainboard/lenovo/s230u/ec.c')
-rw-r--r--src/mainboard/lenovo/s230u/ec.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/s230u/ec.c b/src/mainboard/lenovo/s230u/ec.c
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+++ b/src/mainboard/lenovo/s230u/ec.c
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+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Alexandru Gagniuc <mr.nuke.me@gmail.com>
+ *
+ * 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 <ec/compal/ene932/ec.h>
+
+/* 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);
+}