firmware/target/arm/sandisk/power-c200_e200.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 by Daniel Ankers
  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
  22 #include <stdbool.h>
  23 #include "system.h"
  24 #include "cpu.h"
  25 #include "ascodec.h"
  26 #include "tuner.h"
  27 #include "as3514.h"
  28 #include "power.h"
  29 #include "usb.h"
  30
  31 void power_init(void)
  32 {
  33 }
  34
  35 void power_off(void)
  36 {
  37     char byte;
  38
  39     /* Send shutdown command to PMU */
  40     byte = ascodec_read(AS3514_SYSTEM);
  41     byte &= ~0x1;
  42     ascodec_write(AS3514_SYSTEM, byte);
  43
  44     /* Stop interrupts on both cores */
  45     disable_interrupt(IRQ_FIQ_STATUS);
  46     COP_INT_DIS = -1;
  47     CPU_INT_DIS = -1;
  48
  49     /* Halt everything and wait for device to power off */
  50     while (1)
  51     {
  52         COP_CTL = 0x40000000;
  53         CPU_CTL = 0x40000000;
  54     }
  55 }
  56
  57 unsigned int power_input_status(void)
  58 {
  59     unsigned int status = POWER_INPUT_NONE;
  60
  61 #if defined(SANSA_E200)
  62     #define _charger_present() (GPIOB_INPUT_VAL & 0x10)
  63 #elif defined(SANSA_C200)
  64     #define _charger_present() (GPIOH_INPUT_VAL & 0x2)
  65 #else
  66     #define _charger_present() 0
  67 #endif
  68
  69     if (_charger_present())
  70         status = POWER_INPUT_MAIN_CHARGER;
  71
  72     /* No separate source for USB */
  73
  74     return status;
  75 }
  76
  77 void ide_power_enable(bool on)
  78 {
  79     (void)on;
  80 }
  81
  82 #if CONFIG_TUNER
  83
  84 /** Tuner **/
  85 static bool powered = false;
  86
  87 bool tuner_power(bool status)
  88 {
  89     bool old_status;
  90     lv24020lp_lock();
  91
  92     old_status = powered;
  93
  94     if (status != old_status)
  95     {
  96         if (status)
  97         {
  98             /* init mystery amplification device */
  99 #if defined(SANSA_E200)
 100             GPO32_ENABLE |= 0x1;
 101 #else /* SANSA_C200 */
 102             DEV_INIT2 &= ~0x800;
 103 #endif
 104             udelay(5);
 105
 106             /* When power up, host should initialize the 3-wire bus
 107                in host read mode: */
 108
 109             /* 1. Set direction of the DATA-line to input-mode. */
 110             GPIO_CLEAR_BITWISE(GPIOH_OUTPUT_EN, 1 << 5);
 111             GPIO_SET_BITWISE(GPIOH_ENABLE, 1 << 5);
 112
 113             /* 2. Drive NR_W low */
 114             GPIO_CLEAR_BITWISE(GPIOH_OUTPUT_VAL, 1 << 3);
 115             GPIO_SET_BITWISE(GPIOH_OUTPUT_EN, 1 << 3);
 116             GPIO_SET_BITWISE(GPIOH_ENABLE, 1 << 3);
 117
 118             /* 3. Drive CLOCK high */
 119             GPIO_SET_BITWISE(GPIOH_OUTPUT_VAL, 1 << 4);
 120             GPIO_SET_BITWISE(GPIOH_OUTPUT_EN, 1 << 4);
 121             GPIO_SET_BITWISE(GPIOH_ENABLE, 1 << 4);
 122
 123             lv24020lp_power(true);
 124         }
 125         else
 126         {
 127             lv24020lp_power(false);
 128
 129             /* set all as inputs */
 130             GPIO_CLEAR_BITWISE(GPIOH_OUTPUT_EN, (1 << 5) | (1 << 3) | (1 << 4));
 131             GPIO_CLEAR_BITWISE(GPIOH_ENABLE, (1 << 3) | (1 << 4));
 132
 133             /* turn off mystery amplification device */
 134 #if defined (SANSA_E200)
 135             GPO32_ENABLE &= ~0x1;
 136 #else
 137             DEV_INIT2 |= 0x800;
 138 #endif
 139         }
 140
 141         powered = status;
 142     }
 143
 144     lv24020lp_unlock();
 145     return old_status;
 146 }
 147
 148 #endif /* CONFIG_TUNER */