firmware/drivers/pcf50605.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Driver for pcf50605 PMU and RTC
  11  *
  12  * Based on code from the ipodlinux project - http://ipodlinux.org/
  13  * Adapted for Rockbox in December 2005
  14  *
  15  * Original file: linux/arch/armnommu/mach-ipod/pcf50605.c
  16  *
  17  * Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
  18  *
  19  * All files in this archive are subject to the GNU General Public License.
  20  * See the file COPYING in the source tree root for full license agreement.
  21  *
  22  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  23  * KIND, either express or implied.
  24  *
  25  ****************************************************************************/
  26 #include "system.h"
  27 #include "config.h"
  28 #if CONFIG_I2C == I2C_PP5020 || CONFIG_I2C == I2C_PP5002
  29 #include "i2c-pp.h"
  30 #endif
  31 #include "rtc.h"
  32
  33 #define OOCS  0x01
  34 #define INT1  0x02
  35 #define INT2  0x03
  36 #define INT3  0x04
  37 #define INT1M 0x05
  38 #define INT2M 0x06
  39 #define INT3M 0x07
  40 #define OOCC1 0x08
  41   #define GOSTDBY  0x1
  42   #define TOTRST   (0x1 << 1)
  43   #define CLK32ON  (0x1 << 2)
  44   #define WDTRST   (0x1 << 3)
  45   #define RTCWAK   (0x1 << 4)
  46   #define CHGWAK   (0x1 << 5)
  47   #define EXTONWAK (0x01 << 6)
  48 #define OOCC2 0x09
  49 #define RTCSC 0x0a
  50 #define RTCMN 0x0b
  51 #define RTCHR 0x0c
  52 #define RTCWD 0x0d
  53 #define RTCDT 0x0e
  54 #define RTCMT 0x0f
  55 #define RTCYR 0x10
  56 #define RTCSCA 0x11
  57 #define RTCMNA 0x12
  58 #define RTCHRA 0x13
  59 #define RTCWDA 0x14
  60 #define RTCDTA 0x15
  61 #define RTCMTA 0x16
  62 #define RTCYRA 0x17
  63 #define PSSC   0x18
  64 #define PWROKM 0x19
  65 #define PWROKS 0x1a
  66 #define DCDC1   0x1b
  67 #define DCDC2   0x1c
  68 #define DCDC3   0x1d
  69 #define DCDC4   0x1e
  70 #define DCDEC1  0x1f
  71 #define DCDEC2  0x20
  72 #define DCUDC1  0x21
  73 #define DCUDC2  0x22
  74 #define IOREGC  0x23
  75 #define D1REGC1 0x24
  76 #define D2REGC1 0x25
  77 #define D3REGC1 0x26
  78 #define LPREG1C 0x27
  79
  80
  81 unsigned char pcf50605_wakeup_flags = 0;
  82
  83 int pcf50605_read(int address)
  84 {
  85     return i2c_readbyte(0x8,address);
  86 }
  87
  88 int pcf50605_read_multiple(int address, unsigned char* buf, int count)
  89 {
  90     int read = i2c_readbytes(0x08, address, count, buf);
  91     return read - count;
  92 }
  93
  94 int pcf50605_write(int address, unsigned char val)
  95 {
  96     pp_i2c_send(0x8, address, val);
  97     return 0;
  98 }
  99
 100 int pcf50605_write_multiple(int address, const unsigned char* buf, int count)
 101 {
 102     int i;
 103
 104     i2c_lock();
 105
 106     for (i = 0; i < count; i++)
 107         pp_i2c_send(0x8, address + i, buf[i]);
 108
 109     i2c_unlock();
 110
 111     return 0;
 112 }
 113
 114 /* The following command puts the iPod into a deep sleep.  Warning
 115    from the good people of ipodlinux - never issue this command
 116    without setting CHGWAK or EXTONWAK if you ever want to be able to
 117    power on your iPod again. */
 118 void pcf50605_standby_mode(void)
 119 {
 120     pcf50605_write(OOCC1, GOSTDBY | CHGWAK | EXTONWAK | pcf50605_wakeup_flags);
 121 }
 122
 123 void pcf50605_init(void)
 124 {
 125 #if defined (IPOD_VIDEO)
 126     /* I/O and GPO voltage supply (default: 0xf8 = 3.3V ON) */
 127     /* ECO not allowed regarding data sheet */
 128     pcf50605_write(IOREGC,  0xf8);  /* 3.3V ON */
 129
 130     /* core voltage supply (default DCDC1/DCDC2: 0xec = 1.2V ON) */
 131     /* ECO not stable, assumed due to less precision of voltage in ECO mode */
 132     pcf50605_write(DCDC1,   0xec);  /* 1.2V ON */
 133     pcf50605_write(DCDC2,   0x0c);  /* OFF */
 134
 135     /* unknown (default: 0xe3 = 1.8V ON) */
 136     pcf50605_write(DCUDC1,  0xe3);  /* 1.8V ON */
 137
 138     /* WM8758 voltage supply (default: 0xf5 = 3.0V ON) */
 139     /* ECO not allowed as max. current of 5mA is not sufficient */
 140     pcf50605_write(D1REGC1, 0xf0);  /* 2.5V ON */
 141
 142     /* LCD voltage supply (default: 0xf5 = 3.0V ON) */
 143     pcf50605_write(D3REGC1, 0xf1);  /* 2.6V ON */
 144 #else
 145     /* keep initialization from svn for other iPods */
 146     pcf50605_write(D1REGC1, 0xf5); /* 3.0V ON */
 147     pcf50605_write(D3REGC1, 0xf5); /* 3.0V ON */
 148 #endif
 149     /* Dock Connector pin 17 (default: OFF) */
 150     pcf50605_write(D2REGC1, 0xf8); /* 3.3V ON */
 151 }