firmware/drivers/pcf50635.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2009 by Rob Purchase
  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 "pcf50635.h"
  22 #include "i2c.h"
  23 #include "system.h"
  24
  25 #define PCF50635_ADDR 0xe6
  26
  27 int pcf50635_write(int address, unsigned char val)
  28 {
  29     unsigned char data[] = { address, val };
  30     return i2c_write(PCF50635_ADDR, data, 2);
  31 }
  32
  33 int pcf50635_write_multiple(int address, const unsigned char* buf, int count)
  34 {
  35     int i;
  36
  37     for (i = 0; i < count; i++)
  38         pcf50635_write(address + i, buf[i]);
  39
  40     return 0;
  41 }
  42
  43 int pcf50635_read(int address)
  44 {
  45     unsigned char val = -1;
  46     i2c_readmem(PCF50635_ADDR, address, &val, 1);
  47     return val;
  48 }
  49
  50 int pcf50635_read_multiple(int address, unsigned char* buf, int count)
  51 {
  52     return i2c_readmem(PCF50635_ADDR, address, buf, count);
  53 }
  54
  55 void pcf50635_init(void)
  56 {
  57 #ifdef COWON_D2
  58     static const char init_data[] =
  59     {
  60         /* DOWN1: 1.2V, max DVM step, enabled */
  61         PCF5063X_REG_DOWN1OUT, 0x13,
  62         PCF5063X_REG_DOWN1CTL, 0x1e,
  63         PCF5063X_REG_DOWN1ENA, 0x1,
  64
  65         /* DOWN2: 1.8V, max DVM step, enabled */
  66         PCF5063X_REG_DOWN2OUT, 0x2f,
  67         PCF5063X_REG_DOWN2CTL, 0x1e,
  68         PCF5063X_REG_DOWN2ENA, 0x1,
  69
  70         /* AUTO: 3.0V, enabled */
  71         PCF5063X_REG_AUTOOUT,  0x5f,
  72         PCF5063X_REG_AUTOENA,  0x1,
  73
  74         /* LDO1: 3.3V, enabled */
  75         PCF5063X_REG_LDO1OUT,  0x18,
  76         PCF5063X_REG_LDO1ENA,  0x1,
  77
  78         /* LDO2: 3.0V, enabled */
  79         PCF5063X_REG_LDO2OUT,  0x15,
  80         PCF5063X_REG_LDO2ENA,  0x1,
  81
  82         /* LDO4: 3.0V, enabled */
  83         PCF5063X_REG_LDO4OUT,  0x15,
  84         PCF5063X_REG_LDO4ENA,  0x1,
  85
  86         /* LDO5: 1.8V, enabled */
  87         PCF5063X_REG_LDO5OUT,  0x9,
  88         PCF5063X_REG_LDO5ENA,  0x1,
  89
  90         /* LDO6: 2.1V, enabled */
  91         PCF5063X_REG_LDO6OUT,  0xc,
  92         PCF5063X_REG_LDO6ENA,  0x1,
  93
  94         /* LDO3 and HCLDO disabled */
  95         PCF5063X_REG_LDO3ENA,  0x0,
  96         PCF5063X_REG_HCLDOENA, 0x0,
  97
  98         /* Disable GPIOs */
  99         PCF5063X_REG_GPIOCTL,  0x0,
 100         PCF5063X_REG_GPIO1CFG, 0x0,
 101         PCF5063X_REG_GPIO2CFG, 0x0,
 102         PCF5063X_REG_GPIO3CFG, 0x0,
 103
 104         /* IRQ masks (OF values in brackets) */
 105         PCF5063X_REG_INT1M,    0xff, /* (0x8a enable alarm, usbins, adpins) */
 106         PCF5063X_REG_INT2M,    0xff, /* (0xff all masked) */
 107         PCF5063X_REG_INT3M,    0xff, /* (0x7f enable onkey1s) */
 108         PCF5063X_REG_INT4M,    0xff, /* (0xfd enable lowbat) */
 109         PCF5063X_REG_INT5M,    0xff, /* (0xff all masked) */
 110
 111         /* Wakeup mode */
 112         PCF5063X_REG_OOCMODE,  0x0,  /* onkey falling edge */
 113         PCF5063X_REG_OOCCTL,   0x2,  /* actphrst = phase 3 */
 114         PCF5063X_REG_OOCWAKE,  0xc1, /* wakeup on adapter, usb, onkey */
 115
 116         /* Configure battery charger as per OF */
 117         PCF5063X_REG_MBCC2,    0xa8, /* Vmax = 4.2V, Vbatcond = 2.7V, long debounce */
 118         PCF5063X_REG_MBCC3,    0x2a, /* precharge level = 16% */
 119         PCF5063X_REG_MBCC4,    0x94, /* fastcharge level = 58% */
 120         PCF5063X_REG_MBCC5,    0xff, /* fastcharge level (usb) = 100%  */
 121         PCF5063X_REG_MBCC6,    0x4,  /* cutoff level = 12.5% */
 122         PCF5063X_REG_MBCC7,    0xc1, /* bat-sysImax = 2.2A, USB = 500mA */
 123         PCF5063X_REG_BVMCTL,   0xe,  /* batok level = 3.4V */
 124
 125         /* end marker */
 126         0};
 127
 128     const char* ptr;
 129     for (ptr = init_data; *ptr != 0; ptr += 2)
 130         pcf50635_write(ptr[0], ptr[1]);
 131
 132     /* Enable automatic charging, preserving default values */
 133     pcf50635_write(PCF5063X_REG_MBCC1,
 134         pcf50635_read(PCF5063X_REG_MBCC1) | 7);
 135
 136 #endif
 137 }
 138
 139 void pcf50635_read_adc(int adc, short* res1, short* res2)
 140 {
 141     int adcs1 = 0, adcs2 = 0, adcs3 = 0;
 142
 143     int level = disable_irq_save();
 144
 145     pcf50635_write(PCF5063X_REG_ADCC1, PCF5063X_ADCC1_ADCSTART | adc);
 146
 147     do {
 148         adcs3 = pcf50635_read(PCF5063X_REG_ADCS3);
 149     } while (!(adcs3 & PCF5063X_ADCS3_ADCRDY));
 150
 151     if (res1 != NULL) adcs1 = pcf50635_read(PCF5063X_REG_ADCS1);
 152     if (res2 != NULL) adcs2 = pcf50635_read(PCF5063X_REG_ADCS2);
 153
 154     pcf50635_write(PCF5063X_REG_ADCC1, 0);
 155
 156     restore_interrupt(level);
 157
 158     if (res1 != NULL) *res1 = (adcs1 << 2) | (adcs3 & 3);
 159     if (res2 != NULL) *res2 = (adcs2 << 2) | ((adcs3 & 0xC) >> 2);
 160 }