diff options
| -rw-r--r-- | src/ec/lenovo/h8/Makefile.inc | 7 | ||||
| -rw-r--r-- | src/ec/lenovo/h8/h8.h | 5 | ||||
| -rw-r--r-- | src/ec/lenovo/h8/sense.c | 54 |
3 files changed, 66 insertions, 0 deletions
diff --git a/src/ec/lenovo/h8/Makefile.inc b/src/ec/lenovo/h8/Makefile.inc index ebf6d7d7a4..bccdd91b7d 100644 --- a/src/ec/lenovo/h8/Makefile.inc +++ b/src/ec/lenovo/h8/Makefile.inc @@ -1,5 +1,12 @@ ifeq ($(CONFIG_EC_LENOVO_H8),y) +ramstage-y += sense.c +verstage-y += sense.c +romstage-y += sense.c +bootblock-y += sense.c +postcar-y += sense.c +smm-y += sense.c + ifneq ($(filter y,$(CONFIG_H8_BEEP_ON_DEATH) $(CONFIG_H8_FLASH_LEDS_ON_DEATH)),) romstage-y += panic.c ramstage-y += panic.c diff --git a/src/ec/lenovo/h8/h8.h b/src/ec/lenovo/h8/h8.h index a46ba1f5e0..14948c55ce 100644 --- a/src/ec/lenovo/h8/h8.h +++ b/src/ec/lenovo/h8/h8.h @@ -38,6 +38,9 @@ void h8_usb_always_on(void); void h8_mainboard_init_dock (void); +int h8_get_fn_key(void); +int h8_get_sense_ready(void); + void h8_bluetooth_enable(int on); bool h8_bluetooth_nv_enable(void); bool h8_has_bdc(struct device *dev); @@ -135,8 +138,10 @@ void h8_ssdt_generator(struct device *dev); #define H8_EVENT_FN_PRESS 0x39 #define H8_STATUS0 0x46 +#define H8_STATUS0_FN_KEY_DOWN 0x01 #define H8_STATUS1 0x47 #define H8_STATUS2 0x48 +#define H8_STATUS3 0x49 #define H8_EVENT_BAT0 0x4a #define H8_EVENT_BAT0_STATE 0x4b diff --git a/src/ec/lenovo/h8/sense.c b/src/ec/lenovo/h8/sense.c new file mode 100644 index 0000000000..b929d7ede3 --- /dev/null +++ b/src/ec/lenovo/h8/sense.c @@ -0,0 +1,54 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2018 Patrick Rudolph <siro@das-labor.org> + * + * 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/acpi/ec.h> + +#include "h8.h" + +/** + * Return the EC sense status register state. + * + * Observations showed the sense registers are all zero until the EC populates + * them after some time. Likely the EC sets all bits to it's valid state at + * once, but there's no prove as the firmware isn't available. + * + * Wait for any register having at least one bit set. + * Unlikely that all register will be zero after booting has finished. + * + * @return 1 if the EC provides valid data in sense status registers + */ +int h8_get_sense_ready(void) +{ + static const u8 regs[] = { H8_STATUS0, H8_STATUS1, H8_STATUS2, + H8_STATUS3}; + + for (size_t i = 0; i < ARRAY_SIZE(regs); i++) { + if (ec_read(regs[i])) + return 1; + } + + return 0; +} + +/** + * Return the state of Fn key. + * Only valid if h8_get_sense_ready (see above) returns true. + * + * @return 1 if the key is pressed. + */ +int h8_get_fn_key(void) +{ + return ec_read(H8_STATUS0) & H8_STATUS0_FN_KEY_DOWN; +} |