drivers/power/twl6030.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2010
   4  * Texas Instruments, <www.ti.com>
   5  */
   6 #include <config.h>
   7
   8 #include <twl6030.h>
   9
  10 static struct twl6030_data *twl;
  11
  12 static struct twl6030_data twl6030_info = {
  13         .chip_type      = chip_TWL6030,
  14         .adc_rbase      = GPCH0_LSB,
  15         .adc_ctrl       = CTRL_P2,
  16         .adc_enable     = CTRL_P2_SP2,
  17         .vbat_mult      = TWL6030_VBAT_MULT,
  18         .vbat_shift     = TWL6030_VBAT_SHIFT,
  19 };
  20
  21 static struct twl6030_data twl6032_info = {
  22         .chip_type      = chip_TWL6032,
  23         .adc_rbase      = TWL6032_GPCH0_LSB,
  24         .adc_ctrl       = TWL6032_CTRL_P1,
  25         .adc_enable     = CTRL_P1_SP1,
  26         .vbat_mult      = TWL6032_VBAT_MULT,
  27         .vbat_shift     = TWL6032_VBAT_SHIFT,
  28 };
  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_power_off(void)
  75 {
  76         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_PHOENIX_DEV_ON,
  77                 TWL6030_PHOENIX_APP_DEVOFF | TWL6030_PHOENIX_CON_DEVOFF |
  78                 TWL6030_PHOENIX_MOD_DEVOFF);
  79 }
  80
  81 void twl6030_stop_usb_charging(void)
  82 {
  83         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);
  84
  85         return;
  86 }
  87
  88 void twl6030_start_usb_charging(void)
  89 {
  90         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  91                              CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500);
  92         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  93                              CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE);
  94         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  95                              CONTROLLER_INT_MASK, MBAT_TEMP);
  96         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  97                              CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG);
  98         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
  99                              CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0);
 100         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
 101                              CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400);
 102         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM);
 103         /* Enable USB charging */
 104         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
 105                              CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER);
 106         return;
 107 }
 108
 109 int twl6030_get_battery_current(void)
 110 {
 111         int battery_current = 0;
 112         u8 msb = 0;
 113         u8 lsb = 0;
 114
 115         twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb);
 116         twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb);
 117         battery_current = ((msb << 8) | lsb);
 118
 119         /* convert 10 bit signed number to 16 bit signed number */
 120         if (battery_current >= 0x2000)
 121                 battery_current = (battery_current - 0x4000);
 122
 123         battery_current = battery_current * 3000 / 4096;
 124         printf("Battery Current: %d mA\n", battery_current);
 125
 126         return battery_current;
 127 }
 128
 129 int twl6030_get_battery_voltage(void)
 130 {
 131         int battery_volt = 0;
 132         int ret = 0;
 133         u8 vbatch;
 134
 135         if (twl->chip_type == chip_TWL6030) {
 136                 vbatch = TWL6030_GPADC_VBAT_CHNL;
 137         } else {
 138                 ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
 139                                            TWL6032_GPSELECT_ISB,
 140                                            TWL6032_GPADC_VBAT_CHNL);
 141                 if (ret)
 142                         return ret;
 143                 vbatch = 0;
 144         }
 145
 146         /* Start GPADC SW conversion */
 147         ret = twl6030_gpadc_sw2_trigger();
 148         if (ret) {
 149                 printf("Failed to convert battery voltage\n");
 150                 return ret;
 151         }
 152
 153         /* measure Vbat voltage */
 154         battery_volt = twl6030_gpadc_read_channel(vbatch);
 155         if (battery_volt < 0) {
 156                 printf("Failed to read battery voltage\n");
 157                 return ret;
 158         }
 159         battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift;
 160         printf("Battery Voltage: %d mV\n", battery_volt);
 161
 162         return battery_volt;
 163 }
 164
 165 void twl6030_init_battery_charging(void)
 166 {
 167         u8 val = 0;
 168         int battery_volt = 0;
 169         int ret = 0;
 170
 171         ret = twl6030_i2c_read_u8(TWL6030_CHIP_USB, USB_PRODUCT_ID_LSB, &val);
 172         if (ret) {
 173                 puts("twl6030_init_battery_charging(): could not determine chip!\n");
 174                 return;
 175         }
 176         if (val == 0x30) {
 177                 twl = &twl6030_info;
 178         } else if (val == 0x32) {
 179                 twl = &twl6032_info;
 180         } else {
 181                 puts("twl6030_init_battery_charging(): unsupported chip type\n");
 182                 return;
 183         }
 184
 185         /* Enable VBAT measurement */
 186         if (twl->chip_type == chip_TWL6030) {
 187                 twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
 188                 twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
 189                                      TWL6030_GPADC_CTRL,
 190                                      GPADC_CTRL_SCALER_DIV4);
 191         } else {
 192                 twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
 193                                      TWL6032_GPADC_CTRL2,
 194                                      GPADC_CTRL2_CH18_SCALER_EN);
 195         }
 196
 197         /* Enable GPADC module */
 198         ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS);
 199         if (ret) {
 200                 printf("Failed to enable GPADC\n");
 201                 return;
 202         }
 203
 204         battery_volt = twl6030_get_battery_voltage();
 205         if (battery_volt < 0)
 206                 return;
 207
 208         if (battery_volt < 3000)
 209                 printf("Main battery voltage too low!\n");
 210
 211         /* Check for the presence of USB charger */
 212         twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &val);
 213
 214         /* check for battery presence indirectly via Fuel gauge */
 215         if ((val & VBUS_DET) && (battery_volt < 3300))
 216                 twl6030_start_usb_charging();
 217
 218         return;
 219 }
 220
 221 void twl6030_power_mmc_init(int dev_index)
 222 {
 223         u8 value = 0;
 224
 225         if (dev_index == 0) {
 226                 /* 3.0V voltage output for VMMC */
 227                 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_VOLTAGE,
 228                         TWL6030_CFG_VOLTAGE_30);
 229
 230                 /* Enable P1 output for VMMC */
 231                 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_STATE,
 232                         TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
 233         } else if (dev_index == 1) {
 234                 twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_PH_STS_BOOT,
 235                                     &value);
 236                 /* BOOT2 indicates 1.8V/2.8V VAUX1 for eMMC */
 237                 if (value & TWL6030_PH_STS_BOOT2) {
 238                         /* 1.8V voltage output for VAUX1 */
 239                         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
 240                                 TWL6030_CFG_VOLTAGE_18);
 241                 } else {
 242                         /* 2.8V voltage output for VAUX1 */
 243                         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
 244                                 TWL6030_CFG_VOLTAGE_28);
 245                 }
 246
 247                 /* Enable P1 output for VAUX */
 248                 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_STATE,
 249                         TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
 250         }
 251 }
 252
 253 void twl6030_usb_device_settings()
 254 {
 255         u8 value = 0;
 256
 257         /* 3.3V voltage output for VUSB */
 258         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_VOLTAGE,
 259                 TWL6030_CFG_VOLTAGE_33);
 260
 261         /* Enable P1 output for VUSB */
 262         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_STATE,
 263                 TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
 264
 265         /* Select the input supply for VUSB regulator */
 266         twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_MISC2, &value);
 267         value |= TWL6030_MISC2_VUSB_IN_VSYS;
 268         value &= ~TWL6030_MISC2_VUSB_IN_PMID;
 269         twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_MISC2, value);
 270 }
 271
 272 #ifdef CONFIG_DM_I2C
 273 int twl6030_i2c_write_u8(u8 chip_no, u8 reg, u8 val)
 274 {
 275         struct udevice *dev;
 276         int ret;
 277
 278         ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
 279         if (ret) {
 280                 pr_err("unable to get I2C bus. ret %d\n", ret);
 281                 return ret;
 282         }
 283         ret = dm_i2c_reg_write(dev, reg, val);
 284         if (ret) {
 285                 pr_err("writing to twl6030 failed. ret %d\n", ret);
 286                 return ret;
 287         }
 288         return 0;
 289 }
 290
 291 int twl6030_i2c_read_u8(u8 chip_no, u8 reg, u8 *valp)
 292 {
 293         struct udevice *dev;
 294         int ret;
 295
 296         ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
 297         if (ret) {
 298                 pr_err("unable to get I2C bus. ret %d\n", ret);
 299                 return ret;
 300         }
 301         ret = dm_i2c_reg_read(dev, reg);
 302         if (ret < 0) {
 303                 pr_err("reading from twl6030 failed. ret %d\n", ret);
 304                 return ret;
 305         }
 306         *valp = (u8)ret;
 307         return 0;
 308 }
 309 #endif