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
   9 #include <twl6030.h>
  10
  11 static struct twl6030_data *twl;
  12
  13 static struct twl6030_data twl6030_info = {
  14         .chip_type      = chip_TWL6030,
  15         .adc_rbase      = GPCH0_LSB,
  16         .adc_ctrl       = CTRL_P2,
  17         .adc_enable     = CTRL_P2_SP2,
  18         .vbat_mult      = TWL6030_VBAT_MULT,
  19         .vbat_shift     = TWL6030_VBAT_SHIFT,
  20 };
  21
  22 static struct twl6030_data twl6032_info = {
  23         .chip_type      = chip_TWL6032,
  24         .adc_rbase      = TWL6032_GPCH0_LSB,
  25         .adc_ctrl       = TWL6032_CTRL_P1,
  26         .adc_enable     = CTRL_P1_SP1,
  27         .vbat_mult      = TWL6032_VBAT_MULT,
  28         .vbat_shift     = TWL6032_VBAT_SHIFT,
  29 };
  30
  31 static int twl6030_gpadc_read_channel(u8 channel_no)
  32 {
  33         u8 lsb = 0;
  34         u8 msb = 0;
  35         int ret = 0;
  36
  37         ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
  38                                   twl->adc_rbase + channel_no * 2, &lsb);
  39         if (ret)
  40                 return ret;
  41
  42         ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
  43                                   twl->adc_rbase + 1 + channel_no * 2, &msb);
  44         if (ret)
  45                 return ret;
  46
  47         return (msb << 8) | lsb;
  48 }
  49
  50 static int twl6030_gpadc_sw2_trigger(void)
  51 {
  52         u8 val;
  53         int ret = 0;
  54
  55         ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
  56                                    twl->adc_ctrl, twl->adc_enable);
  57         if (ret)
  58                 return ret;
  59
  60         /* Waiting until the SW1 conversion ends*/
  61         val =  CTRL_P2_BUSY;
  62
  63         while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) {
  64                 ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
  65                                           twl->adc_ctrl, &val);
  66                 if (ret)
  67                         return ret;
  68                 udelay(1000);
  69         }
  70
  71         return 0;
  72 }
  73
  74 void twl6030_stop_usb_charging(void)
  75 {
  76         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);
  77
  78         return;
  79 }
  80
  81 void twl6030_start_usb_charging(void)
  82 {
  83         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  84                              CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500);
  85         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  86                              CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE);
  87         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  88                              CONTROLLER_INT_MASK, MBAT_TEMP);
  89         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  90                              CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG);
  91         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  92                              CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0);
  93         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  94                              CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400);
  95         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM);
  96         /* Enable USB charging */
  97         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  98                              CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER);
  99         return;
 100 }
 101
 102 int twl6030_get_battery_current(void)
 103 {
 104         int battery_current = 0;
 105         u8 msb = 0;
 106         u8 lsb = 0;
 107
 108         twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb);
 109         twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb);
 110         battery_current = ((msb << 8) | lsb);
 111
 112         /* convert 10 bit signed number to 16 bit signed number */
 113         if (battery_current >= 0x2000)
 114                 battery_current = (battery_current - 0x4000);
 115
 116         battery_current = battery_current * 3000 / 4096;
 117         printf("Battery Current: %d mA\n", battery_current);
 118
 119         return battery_current;
 120 }
 121
 122 int twl6030_get_battery_voltage(void)
 123 {
 124         int battery_volt = 0;
 125         int ret = 0;
 126         u8 vbatch;
 127
 128         if (twl->chip_type == chip_TWL6030) {
 129                 vbatch = TWL6030_GPADC_VBAT_CHNL;
 130         } else {
 131                 ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
 132                                            TWL6032_GPSELECT_ISB,
 133                                            TWL6032_GPADC_VBAT_CHNL);
 134                 if (ret)
 135                         return ret;
 136                 vbatch = 0;
 137         }
 138
 139         /* Start GPADC SW conversion */
 140         ret = twl6030_gpadc_sw2_trigger();
 141         if (ret) {
 142                 printf("Failed to convert battery voltage\n");
 143                 return ret;
 144         }
 145
 146         /* measure Vbat voltage */
 147         battery_volt = twl6030_gpadc_read_channel(vbatch);
 148         if (battery_volt < 0) {
 149                 printf("Failed to read battery voltage\n");
 150                 return ret;
 151         }
 152         battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift;
 153         printf("Battery Voltage: %d mV\n", battery_volt);
 154
 155         return battery_volt;
 156 }
 157
 158 void twl6030_init_battery_charging(void)
 159 {
 160         u8 val = 0;
 161         int battery_volt = 0;
 162         int ret = 0;
 163
 164         ret = twl6030_i2c_read_u8(TWL6030_CHIP_USB, USB_PRODUCT_ID_LSB, &val);
 165         if (ret) {
 166                 puts("twl6030_init_battery_charging(): could not determine chip!\n");
 167                 return;
 168         }
 169         if (val == 0x30) {
 170                 twl = &twl6030_info;
 171         } else if (val == 0x32) {
 172                 twl = &twl6032_info;
 173         } else {
 174                 puts("twl6030_init_battery_charging(): unsupported chip type\n");
 175                 return;
 176         }
 177
 178         /* Enable VBAT measurement */
 179         if (twl->chip_type == chip_TWL6030) {
 180                 twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
 181                 twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
 182                                      TWL6030_GPADC_CTRL,
 183                                      GPADC_CTRL_SCALER_DIV4);
 184         } else {
 185                 twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
 186                                      TWL6032_GPADC_CTRL2,
 187                                      GPADC_CTRL2_CH18_SCALER_EN);
 188         }
 189
 190         /* Enable GPADC module */
 191         ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS);
 192         if (ret) {
 193                 printf("Failed to enable GPADC\n");
 194                 return;
 195         }
 196
 197         battery_volt = twl6030_get_battery_voltage();
 198         if (battery_volt < 0)
 199                 return;
 200
 201         if (battery_volt < 3000)
 202                 printf("Main battery voltage too low!\n");
 203
 204         /* Check for the presence of USB charger */
 205         twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &val);
 206
 207         /* check for battery presence indirectly via Fuel gauge */
 208         if ((val & VBUS_DET) && (battery_volt < 3300))
 209                 twl6030_start_usb_charging();
 210
 211         return;
 212 }
 213
 214 void twl6030_power_mmc_init(int dev_index)
 215 {
 216         u8 value = 0;
 217
 218         if (dev_index == 0) {
 219                 /* 3.0V voltage output for VMMC */
 220                 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_VOLTAGE,
 221                         TWL6030_CFG_VOLTAGE_30);
 222
 223                 /* Enable P1 output for VMMC */
 224                 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_STATE,
 225                         TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
 226
 227                 twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_PH_STS_BOOT, &value);
 228         } else if (dev_index == 1) {
 229                 /* BOOT2 indicates 1.8V/2.8V VAUX1 for eMMC */
 230                 if (value & TWL6030_PH_STS_BOOT2) {
 231                         /* 1.8V voltage output for VAUX1 */
 232                         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
 233                                 TWL6030_CFG_VOLTAGE_18);
 234                 } else {
 235                         /* 2.8V voltage output for VAUX1 */
 236                         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
 237                                 TWL6030_CFG_VOLTAGE_28);
 238                 }
 239
 240                 /* Enable P1 output for VAUX */
 241                 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_STATE,
 242                         TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
 243         }
 244 }
 245
 246 void twl6030_usb_device_settings()
 247 {
 248         u8 value = 0;
 249
 250         /* 3.3V voltage output for VUSB */
 251         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_VOLTAGE,
 252                 TWL6030_CFG_VOLTAGE_33);
 253
 254         /* Enable P1 output for VUSB */
 255         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_STATE,
 256                 TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
 257
 258         /* Select the input supply for VUSB regulator */
 259         twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_MISC2, &value);
 260         value |= TWL6030_MISC2_VUSB_IN_VSYS;
 261         value &= ~TWL6030_MISC2_VUSB_IN_PMID;
 262         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_MISC2, value);
 263 }