src/ec/lenovo/h8/smm.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2016 Nicola Corna <nicola@corna.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <ec/acpi/ec.h>
  17 #include <pc80/mc146818rtc.h>
  18
  19 #include "h8.h"
  20
  21 enum usb_always_on {
  22         UAO_OFF = 0,
  23         UAO_AC_AND_BATTERY,
  24         UAO_AC_ONLY
  25 };
  26
  27 void h8_usb_always_on(void)
  28 {
  29         enum usb_always_on val;
  30         u8 reg;
  31
  32         if (get_option(&val, "usb_always_on") != CB_SUCCESS)
  33                 val = UAO_OFF;
  34
  35         if (val == UAO_AC_AND_BATTERY) {
  36                 reg = ec_read(H8_USB_ALWAYS_ON);
  37                 reg &= ~H8_USB_ALWAYS_ON_AC_ONLY;
  38                 reg |= H8_USB_ALWAYS_ON_ENABLE;
  39                 ec_write(H8_USB_ALWAYS_ON, reg);
  40         } else if (val == UAO_AC_ONLY) {
  41                 reg = ec_read(H8_USB_ALWAYS_ON);
  42                 reg |= H8_USB_ALWAYS_ON_AC_ONLY;
  43                 reg |= H8_USB_ALWAYS_ON_ENABLE;
  44                 ec_write(H8_USB_ALWAYS_ON, reg);
  45                 ec_set_bit(0x2, 3);
  46         }
  47 }