git.sur5r.net Git - u-boot/blob - drivers/power/twl6030.c

   1 /*
   2  * (C) Copyright 2010
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 #include <config.h>
   8 #ifdef CONFIG_TWL6030_POWER
   9
  10 #include <twl6030.h>
  11
  12 static struct twl6030_data *twl;
  13
  14 static struct twl6030_data twl6030_info = {
  15         .chip_type      = chip_TWL6030,
  16         .adc_rbase      = GPCH0_LSB,
  17         .adc_ctrl       = CTRL_P2,
  18         .adc_enable     = CTRL_P2_SP2,
  19         .vbat_mult      = TWL6030_VBAT_MULT,
  20         .vbat_shift     = TWL6030_VBAT_SHIFT,
  21 };
  22
  23 static int twl6030_gpadc_read_channel(u8 channel_no)
  24 {
  25         u8 lsb = 0;
  26         u8 msb = 0;
  27         int ret = 0;
  28
  29         ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
  30                                   twl->adc_rbase + channel_no * 2, &lsb);
  31         if (ret)
  32                 return ret;
  33
  34         ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
  35                                   twl->adc_rbase + 1 + channel_no * 2, &msb);
  36         if (ret)
  37                 return ret;
  38
  39         return (msb << 8) | lsb;
  40 }
  41
  42 static int twl6030_gpadc_sw2_trigger(void)
  43 {
  44         u8 val;
  45         int ret = 0;
  46
  47         ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
  48                                    twl->adc_ctrl, twl->adc_enable);
  49         if (ret)
  50                 return ret;
  51
  52         /* Waiting until the SW1 conversion ends*/
  53         val =  CTRL_P2_BUSY;
  54
  55         while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) {
  56                 ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
  57                                           twl->adc_ctrl, &val);
  58                 if (ret)
  59                         return ret;
  60                 udelay(1000);
  61         }
  62
  63         return 0;
  64 }
  65
  66 void twl6030_stop_usb_charging(void)
  67 {
  68         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);
  69
  70         return;
  71 }
  72
  73 void twl6030_start_usb_charging(void)
  74 {
  75         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  76                              CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500);
  77         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  78                              CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE);
  79         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  80                              CONTROLLER_INT_MASK, MBAT_TEMP);
  81         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  82                              CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG);
  83         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  84                              CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0);
  85         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  86                              CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400);
  87         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM);
  88         /* Enable USB charging */
  89         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  90                              CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER);
  91         return;
  92 }
  93
  94 int twl6030_get_battery_current(void)
  95 {
  96         int battery_current = 0;
  97         u8 msb = 0;
  98         u8 lsb = 0;
  99
 100         twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb);
 101         twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb);
 102         battery_current = ((msb << 8) | lsb);
 103
 104         /* convert 10 bit signed number to 16 bit signed number */
 105         if (battery_current >= 0x2000)
 106                 battery_current = (battery_current - 0x4000);
 107
 108         battery_current = battery_current * 3000 / 4096;
 109         printf("Battery Current: %d mA\n", battery_current);
 110
 111         return battery_current;
 112 }
 113
 114 int twl6030_get_battery_voltage(void)
 115 {
 116         int battery_volt = 0;
 117         int ret = 0;
 118
 119         /* Start GPADC SW conversion */
 120         ret = twl6030_gpadc_sw2_trigger();
 121         if (ret) {
 122                 printf("Failed to convert battery voltage\n");
 123                 return ret;
 124         }
 125
 126         /* measure Vbat voltage */
 127         battery_volt = twl6030_gpadc_read_channel(7);
 128         if (battery_volt < 0) {
 129                 printf("Failed to read battery voltage\n");
 130                 return ret;
 131         }
 132         battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift;
 133         printf("Battery Voltage: %d mV\n", battery_volt);
 134
 135         return battery_volt;
 136 }
 137
 138 void twl6030_init_battery_charging(void)
 139 {
 140         u8 stat1 = 0;
 141         int battery_volt = 0;
 142         int ret = 0;
 143
 144         twl = &twl6030_info;
 145
 146         /* Enable VBAT measurement */
 147         twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
 148
 149         /* Enable GPADC module */
 150         ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS);
 151         if (ret) {
 152                 printf("Failed to enable GPADC\n");
 153                 return;
 154         }
 155
 156         battery_volt = twl6030_get_battery_voltage();
 157         if (battery_volt < 0)
 158                 return;
 159
 160         if (battery_volt < 3000)
 161                 printf("Main battery voltage too low!\n");
 162
 163         /* Check for the presence of USB charger */
 164         twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &stat1);
 165
 166         /* check for battery presence indirectly via Fuel gauge */
 167         if ((stat1 & VBUS_DET) && (battery_volt < 3300))
 168                 twl6030_start_usb_charging();
 169
 170         return;
 171 }
 172
 173 void twl6030_power_mmc_init()
 174 {
 175         /* set voltage to 3.0 and turnon for APP */
 176         twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_VOLTATE, 0x15);
 177         twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_STATE, 0x21);
 178 }
 179
 180 void twl6030_usb_device_settings()
 181 {
 182         u8 data = 0;
 183
 184         /* Select APP Group and set state to ON */
 185         twl6030_i2c_write_u8(TWL6030_CHIP_PM, VUSB_CFG_STATE, 0x21);
 186
 187         twl6030_i2c_read_u8(TWL6030_CHIP_PM, MISC2, &data);
 188         data |= 0x10;
 189
 190         /* Select the input supply for VBUS regulator */
 191         twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC2, data);
 192 }
 193 #endif