firmware/target/arm/s5l8700/power-meizu.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright © 2009 Bertrik Sikken
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include <stdbool.h>
  22 #include "config.h"
  23 #include "inttypes.h"
  24 #include "s5l8700.h"
  25 #include "power.h"
  26
  27 /*  Power handling for S5L8700 based Meizu players
  28
  29     The M3 and M6 players appear to use the same pins for power, USB detection
  30     and charging status.
  31 */
  32
  33 void power_off(void)
  34 {
  35     /* take down PWRON_M (P1.3) */
  36     PDAT1 &= ~(1 << 3);
  37 }
  38
  39 void power_init(void)
  40 {
  41     /* configure PWRON_M (P1.3) as output and set it to keep power turned on */
  42     PCON1 = (PCON1 & ~(0xF << 12)) | (0x1 << 12);
  43     PDAT1 |= (1 << 3);
  44
  45     /* configure PBSTAT (P1.4) as input */
  46     PCON1 &= ~(0xF << 16);
  47
  48     /* configure CHRG (P5.7) as input to monitor charging state */
  49     PCON5 &= ~(0xF << 28);
  50
  51     /* enable USB2.0 function controller to allow VBUS monitoring */
  52     PWRCON &= ~(1 << 15);
  53 }
  54
  55 #if CONFIG_CHARGING
  56 unsigned int power_input_status(void)
  57 {
  58     /* check VBUS in the USB2.0 function controller */
  59     if (USB_TR & (1 << 15)) {
  60         return POWER_INPUT_USB;
  61     }
  62
  63     return POWER_INPUT_NONE;
  64 }
  65
  66 bool charging_state(void)
  67 {
  68     /* CHRG pin goes low when charging */
  69     return ((PDAT5 & (1 << 7)) == 0);
  70 }
  71 #endif /* CONFIG_CHARGING */
  72
  73 #if CONFIG_TUNER
  74 static bool tuner_on = false;
  75
  76 bool tuner_power(bool status)
  77 {
  78     if (status != tuner_on)
  79     {
  80         tuner_on = status;
  81         status = !status;
  82     }
  83
  84     return status;
  85 }
  86
  87 bool tuner_powered(void)
  88 {
  89     return tuner_on; /* No debug info */
  90 }
  91 #endif /* CONFIG_TUNER */
  92