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Diffstat (limited to 'src/mainboard/lenovo/s230u/ec.c')
-rw-r--r-- | src/mainboard/lenovo/s230u/ec.c | 49 |
1 files changed, 49 insertions, 0 deletions
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 <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); +} |