drivers/regulator/da903x.c

   1 /*
   2  * Regulators driver for Dialog Semiconductor DA903x
   3  *
   4  * Copyright (C) 2006-2008 Marvell International Ltd.
   5  * Copyright (C) 2008 Compulab Ltd.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/err.h>
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/regulator/driver.h>
  18 #include <linux/regulator/machine.h>
  19 #include <linux/mfd/da903x.h>
  20
  21 /* DA9030 Registers */
  22 #define DA9030_INVAL            (-1)
  23 #define DA9030_LDO1011          (0x10)
  24 #define DA9030_LDO15            (0x11)
  25 #define DA9030_LDO1416          (0x12)
  26 #define DA9030_LDO1819          (0x13)
  27 #define DA9030_LDO17            (0x14)
  28 #define DA9030_BUCK2DVM1        (0x15)
  29 #define DA9030_BUCK2DVM2        (0x16)
  30 #define DA9030_RCTL11           (0x17)
  31 #define DA9030_RCTL21           (0x18)
  32 #define DA9030_LDO1             (0x90)
  33 #define DA9030_LDO23            (0x91)
  34 #define DA9030_LDO45            (0x92)
  35 #define DA9030_LDO6             (0x93)
  36 #define DA9030_LDO78            (0x94)
  37 #define DA9030_LDO912           (0x95)
  38 #define DA9030_BUCK             (0x96)
  39 #define DA9030_RCTL12           (0x97)
  40 #define DA9030_RCTL22           (0x98)
  41 #define DA9030_LDO_UNLOCK       (0xa0)
  42 #define DA9030_LDO_UNLOCK_MASK  (0xe0)
  43 #define DA9034_OVER1            (0x10)
  44
  45 /* DA9034 Registers */
  46 #define DA9034_INVAL            (-1)
  47 #define DA9034_OVER2            (0x11)
  48 #define DA9034_OVER3            (0x12)
  49 #define DA9034_LDO643           (0x13)
  50 #define DA9034_LDO987           (0x14)
  51 #define DA9034_LDO1110          (0x15)
  52 #define DA9034_LDO1312          (0x16)
  53 #define DA9034_LDO1514          (0x17)
  54 #define DA9034_VCC1             (0x20)
  55 #define DA9034_ADTV1            (0x23)
  56 #define DA9034_ADTV2            (0x24)
  57 #define DA9034_AVRC             (0x25)
  58 #define DA9034_CDTV1            (0x26)
  59 #define DA9034_CDTV2            (0x27)
  60 #define DA9034_CVRC             (0x28)
  61 #define DA9034_SDTV1            (0x29)
  62 #define DA9034_SDTV2            (0x2a)
  63 #define DA9034_SVRC             (0x2b)
  64 #define DA9034_MDTV1            (0x32)
  65 #define DA9034_MDTV2            (0x33)
  66 #define DA9034_MVRC             (0x34)
  67
  68 /* DA9035 Registers. DA9034 Registers are comptabile to DA9035. */
  69 #define DA9035_OVER3            (0x12)
  70 #define DA9035_VCC2             (0x1f)
  71 #define DA9035_3DTV1            (0x2c)
  72 #define DA9035_3DTV2            (0x2d)
  73 #define DA9035_3VRC             (0x2e)
  74 #define DA9035_AUTOSKIP         (0x2f)
  75
  76 struct da903x_regulator_info {
  77         struct regulator_desc desc;
  78
  79         int     max_uV;
  80         int     vol_reg;
  81         int     vol_shift;
  82         int     vol_nbits;
  83         int     update_reg;
  84         int     update_bit;
  85         int     enable_reg;
  86         int     enable_bit;
  87 };
  88
  89 static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
  90 {
  91         return rdev_get_dev(rdev)->parent->parent;
  92 }
  93
  94 static inline int check_range(struct da903x_regulator_info *info,
  95                                 int min_uV, int max_uV)
  96 {
  97         if (min_uV < info->desc.min_uV || min_uV > info->max_uV)
  98                 return -EINVAL;
  99
 100         return 0;
 101 }
 102
 103 /* DA9030/DA9034 common operations */
 104 static int da903x_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
 105 {
 106         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 107         struct device *da9034_dev = to_da903x_dev(rdev);
 108         uint8_t val, mask;
 109
 110         if (rdev->desc->n_voltages == 1)
 111                 return -EINVAL;
 112
 113         val = selector << info->vol_shift;
 114         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 115
 116         return da903x_update(da9034_dev, info->vol_reg, val, mask);
 117 }
 118
 119 static int da903x_get_voltage_sel(struct regulator_dev *rdev)
 120 {
 121         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 122         struct device *da9034_dev = to_da903x_dev(rdev);
 123         uint8_t val, mask;
 124         int ret;
 125
 126         if (rdev->desc->n_voltages == 1)
 127                 return 0;
 128
 129         ret = da903x_read(da9034_dev, info->vol_reg, &val);
 130         if (ret)
 131                 return ret;
 132
 133         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 134         val = (val & mask) >> info->vol_shift;
 135
 136         return val;
 137 }
 138
 139 static int da903x_enable(struct regulator_dev *rdev)
 140 {
 141         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 142         struct device *da9034_dev = to_da903x_dev(rdev);
 143
 144         return da903x_set_bits(da9034_dev, info->enable_reg,
 145                                         1 << info->enable_bit);
 146 }
 147
 148 static int da903x_disable(struct regulator_dev *rdev)
 149 {
 150         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 151         struct device *da9034_dev = to_da903x_dev(rdev);
 152
 153         return da903x_clr_bits(da9034_dev, info->enable_reg,
 154                                         1 << info->enable_bit);
 155 }
 156
 157 static int da903x_is_enabled(struct regulator_dev *rdev)
 158 {
 159         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 160         struct device *da9034_dev = to_da903x_dev(rdev);
 161         uint8_t reg_val;
 162         int ret;
 163
 164         ret = da903x_read(da9034_dev, info->enable_reg, &reg_val);
 165         if (ret)
 166                 return ret;
 167
 168         return !!(reg_val & (1 << info->enable_bit));
 169 }
 170
 171 /* DA9030 specific operations */
 172 static int da9030_set_ldo1_15_voltage_sel(struct regulator_dev *rdev,
 173                                           unsigned selector)
 174 {
 175         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 176         struct device *da903x_dev = to_da903x_dev(rdev);
 177         uint8_t val, mask;
 178         int ret;
 179
 180         val = selector << info->vol_shift;
 181         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 182         val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
 183         mask |= DA9030_LDO_UNLOCK_MASK;
 184
 185         /* write twice */
 186         ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
 187         if (ret)
 188                 return ret;
 189
 190         return da903x_update(da903x_dev, info->vol_reg, val, mask);
 191 }
 192
 193 static int da9030_map_ldo14_voltage(struct regulator_dev *rdev,
 194                                     int min_uV, int max_uV)
 195 {
 196         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 197         int thresh, sel;
 198
 199         if (check_range(info, min_uV, max_uV)) {
 200                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 201                 return -EINVAL;
 202         }
 203
 204         thresh = (info->max_uV + info->desc.min_uV) / 2;
 205         if (min_uV < thresh) {
 206                 sel = DIV_ROUND_UP(thresh - min_uV, info->desc.uV_step);
 207                 sel |= 0x4;
 208         } else {
 209                 sel = DIV_ROUND_UP(min_uV - thresh, info->desc.uV_step);
 210         }
 211
 212         return sel;
 213 }
 214
 215 static int da9030_list_ldo14_voltage(struct regulator_dev *rdev,
 216                                      unsigned selector)
 217 {
 218         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 219         int volt;
 220
 221         if (selector & 0x4)
 222                 volt = rdev->desc->min_uV +
 223                        rdev->desc->uV_step * (3 - (selector & ~0x4));
 224         else
 225                 volt = (info->max_uV + rdev->desc->min_uV) / 2 +
 226                        rdev->desc->uV_step * (selector & ~0x4);
 227
 228         if (volt > info->max_uV)
 229                 return -EINVAL;
 230
 231         return volt;
 232 }
 233
 234 /* DA9034 specific operations */
 235 static int da9034_set_dvc_voltage_sel(struct regulator_dev *rdev,
 236                                       unsigned selector)
 237 {
 238         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 239         struct device *da9034_dev = to_da903x_dev(rdev);
 240         uint8_t val, mask;
 241         int ret;
 242
 243         val = selector << info->vol_shift;
 244         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 245
 246         ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
 247         if (ret)
 248                 return ret;
 249
 250         ret = da903x_set_bits(da9034_dev, info->update_reg,
 251                                         1 << info->update_bit);
 252         return ret;
 253 }
 254
 255 static const struct regulator_linear_range da9034_ldo12_ranges[] = {
 256         REGULATOR_LINEAR_RANGE(1700000, 0, 7, 50000),
 257         REGULATOR_LINEAR_RANGE(2700000, 8, 15, 50000),
 258 };
 259
 260 static const struct regulator_ops da903x_regulator_ldo_ops = {
 261         .set_voltage_sel = da903x_set_voltage_sel,
 262         .get_voltage_sel = da903x_get_voltage_sel,
 263         .list_voltage   = regulator_list_voltage_linear,
 264         .map_voltage    = regulator_map_voltage_linear,
 265         .enable         = da903x_enable,
 266         .disable        = da903x_disable,
 267         .is_enabled     = da903x_is_enabled,
 268 };
 269
 270 /* NOTE: this is dedicated for the insane DA9030 LDO14 */
 271 static const struct regulator_ops da9030_regulator_ldo14_ops = {
 272         .set_voltage_sel = da903x_set_voltage_sel,
 273         .get_voltage_sel = da903x_get_voltage_sel,
 274         .list_voltage   = da9030_list_ldo14_voltage,
 275         .map_voltage    = da9030_map_ldo14_voltage,
 276         .enable         = da903x_enable,
 277         .disable        = da903x_disable,
 278         .is_enabled     = da903x_is_enabled,
 279 };
 280
 281 /* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks  */
 282 static const struct regulator_ops da9030_regulator_ldo1_15_ops = {
 283         .set_voltage_sel = da9030_set_ldo1_15_voltage_sel,
 284         .get_voltage_sel = da903x_get_voltage_sel,
 285         .list_voltage   = regulator_list_voltage_linear,
 286         .map_voltage    = regulator_map_voltage_linear,
 287         .enable         = da903x_enable,
 288         .disable        = da903x_disable,
 289         .is_enabled     = da903x_is_enabled,
 290 };
 291
 292 static const struct regulator_ops da9034_regulator_dvc_ops = {
 293         .set_voltage_sel = da9034_set_dvc_voltage_sel,
 294         .get_voltage_sel = da903x_get_voltage_sel,
 295         .list_voltage   = regulator_list_voltage_linear,
 296         .map_voltage    = regulator_map_voltage_linear,
 297         .enable         = da903x_enable,
 298         .disable        = da903x_disable,
 299         .is_enabled     = da903x_is_enabled,
 300 };
 301
 302 /* NOTE: this is dedicated for the insane LDO12 */
 303 static const struct regulator_ops da9034_regulator_ldo12_ops = {
 304         .set_voltage_sel = da903x_set_voltage_sel,
 305         .get_voltage_sel = da903x_get_voltage_sel,
 306         .list_voltage   = regulator_list_voltage_linear_range,
 307         .map_voltage    = regulator_map_voltage_linear_range,
 308         .enable         = da903x_enable,
 309         .disable        = da903x_disable,
 310         .is_enabled     = da903x_is_enabled,
 311 };
 312
 313 #define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit)  \
 314 {                                                                       \
 315         .desc   = {                                                     \
 316                 .name   = "LDO" #_id,                                   \
 317                 .ops    = &da903x_regulator_ldo_ops,                    \
 318                 .type   = REGULATOR_VOLTAGE,                            \
 319                 .id     = _pmic##_ID_LDO##_id,                          \
 320                 .n_voltages = (step) ? ((max - min) / step + 1) : 1,    \
 321                 .owner  = THIS_MODULE,                                  \
 322                 .min_uV  = (min) * 1000,                                \
 323                 .uV_step = (step) * 1000,                               \
 324         },                                                              \
 325         .max_uV         = (max) * 1000,                                 \
 326         .vol_reg        = _pmic##_##vreg,                               \
 327         .vol_shift      = (shift),                                      \
 328         .vol_nbits      = (nbits),                                      \
 329         .enable_reg     = _pmic##_##ereg,                               \
 330         .enable_bit     = (ebit),                                       \
 331 }
 332
 333 #define DA903x_DVC(_pmic, _id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 334 {                                                                       \
 335         .desc   = {                                                     \
 336                 .name   = #_id,                                         \
 337                 .ops    = &da9034_regulator_dvc_ops,                    \
 338                 .type   = REGULATOR_VOLTAGE,                            \
 339                 .id     = _pmic##_ID_##_id,                             \
 340                 .n_voltages = (step) ? ((max - min) / step + 1) : 1,    \
 341                 .owner  = THIS_MODULE,                                  \
 342                 .min_uV = (min) * 1000,                                 \
 343                 .uV_step = (step) * 1000,                               \
 344         },                                                              \
 345         .max_uV         = (max) * 1000,                                 \
 346         .vol_reg        = _pmic##_##vreg,                               \
 347         .vol_shift      = (0),                                          \
 348         .vol_nbits      = (nbits),                                      \
 349         .update_reg     = _pmic##_##ureg,                               \
 350         .update_bit     = (ubit),                                       \
 351         .enable_reg     = _pmic##_##ereg,                               \
 352         .enable_bit     = (ebit),                                       \
 353 }
 354
 355 #define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
 356         DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
 357
 358 #define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
 359         DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
 360
 361 #define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 362         DA903x_DVC(DA9030, _id, min, max, step, vreg, nbits, ureg, ubit, \
 363                    ereg, ebit)
 364
 365 #define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 366         DA903x_DVC(DA9034, _id, min, max, step, vreg, nbits, ureg, ubit, \
 367                    ereg, ebit)
 368
 369 #define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 370         DA903x_DVC(DA9035, _id, min, max, step, vreg, nbits, ureg, ubit, \
 371                    ereg, ebit)
 372
 373 static struct da903x_regulator_info da903x_regulator_info[] = {
 374         /* DA9030 */
 375         DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),
 376
 377         DA9030_LDO( 1, 1200, 3200, 100,    LDO1, 0, 5, RCTL12, 1),
 378         DA9030_LDO( 2, 1800, 3200, 100,   LDO23, 0, 4, RCTL12, 2),
 379         DA9030_LDO( 3, 1800, 3200, 100,   LDO23, 4, 4, RCTL12, 3),
 380         DA9030_LDO( 4, 1800, 3200, 100,   LDO45, 0, 4, RCTL12, 4),
 381         DA9030_LDO( 5, 1800, 3200, 100,   LDO45, 4, 4, RCTL12, 5),
 382         DA9030_LDO( 6, 1800, 3200, 100,    LDO6, 0, 4, RCTL12, 6),
 383         DA9030_LDO( 7, 1800, 3200, 100,   LDO78, 0, 4, RCTL12, 7),
 384         DA9030_LDO( 8, 1800, 3200, 100,   LDO78, 4, 4, RCTL22, 0),
 385         DA9030_LDO( 9, 1800, 3200, 100,  LDO912, 0, 4, RCTL22, 1),
 386         DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
 387         DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
 388         DA9030_LDO(12, 1800, 3200, 100,  LDO912, 4, 4, RCTL22, 4),
 389         DA9030_LDO(14, 2760, 2940,  30, LDO1416, 0, 3, RCTL11, 4),
 390         DA9030_LDO(15, 1100, 2650,  50,   LDO15, 0, 5, RCTL11, 5),
 391         DA9030_LDO(16, 1100, 2650,  50, LDO1416, 3, 5, RCTL11, 6),
 392         DA9030_LDO(17, 1800, 3200, 100,   LDO17, 0, 4, RCTL11, 7),
 393         DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
 394         DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
 395         DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
 396
 397         /* DA9034 */
 398         DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0),
 399         DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1),
 400         DA9034_DVC(LDO2,  725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2),
 401         DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
 402
 403         DA9034_LDO( 3, 1800, 3300, 100,  LDO643, 0, 4, OVER3, 5),
 404         DA9034_LDO( 4, 1800, 2900,1100,  LDO643, 4, 1, OVER3, 6),
 405         DA9034_LDO( 6, 2500, 2850,  50,  LDO643, 5, 3, OVER2, 0),
 406         DA9034_LDO( 7, 2700, 3050,  50,  LDO987, 0, 3, OVER2, 1),
 407         DA9034_LDO( 8, 2700, 2850,  50,  LDO987, 3, 2, OVER2, 2),
 408         DA9034_LDO( 9, 2700, 3050,  50,  LDO987, 5, 3, OVER2, 3),
 409         DA9034_LDO(10, 2700, 3050,  50, LDO1110, 0, 3, OVER2, 4),
 410         DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
 411         DA9034_LDO(12, 1700, 3050,  50, LDO1312, 0, 4, OVER3, 6),
 412         DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
 413         DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
 414         DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
 415         DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
 416
 417         /* DA9035 */
 418         DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
 419 };
 420
 421 static inline struct da903x_regulator_info *find_regulator_info(int id)
 422 {
 423         struct da903x_regulator_info *ri;
 424         int i;
 425
 426         for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
 427                 ri = &da903x_regulator_info[i];
 428                 if (ri->desc.id == id)
 429                         return ri;
 430         }
 431         return NULL;
 432 }
 433
 434 static int da903x_regulator_probe(struct platform_device *pdev)
 435 {
 436         struct da903x_regulator_info *ri = NULL;
 437         struct regulator_dev *rdev;
 438         struct regulator_config config = { };
 439
 440         ri = find_regulator_info(pdev->id);
 441         if (ri == NULL) {
 442                 dev_err(&pdev->dev, "invalid regulator ID specified\n");
 443                 return -EINVAL;
 444         }
 445
 446         /* Workaround for the weird LDO12 voltage setting */
 447         if (ri->desc.id == DA9034_ID_LDO12) {
 448                 ri->desc.ops = &da9034_regulator_ldo12_ops;
 449                 ri->desc.n_voltages = 16;
 450                 ri->desc.linear_ranges = da9034_ldo12_ranges;
 451                 ri->desc.n_linear_ranges = ARRAY_SIZE(da9034_ldo12_ranges);
 452         }
 453
 454         if (ri->desc.id == DA9030_ID_LDO14)
 455                 ri->desc.ops = &da9030_regulator_ldo14_ops;
 456
 457         if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
 458                 ri->desc.ops = &da9030_regulator_ldo1_15_ops;
 459
 460         config.dev = &pdev->dev;
 461         config.init_data = dev_get_platdata(&pdev->dev);
 462         config.driver_data = ri;
 463
 464         rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
 465         if (IS_ERR(rdev)) {
 466                 dev_err(&pdev->dev, "failed to register regulator %s\n",
 467                                 ri->desc.name);
 468                 return PTR_ERR(rdev);
 469         }
 470
 471         platform_set_drvdata(pdev, rdev);
 472         return 0;
 473 }
 474
 475 static struct platform_driver da903x_regulator_driver = {
 476         .driver = {
 477                 .name   = "da903x-regulator",
 478         },
 479         .probe          = da903x_regulator_probe,
 480 };
 481
 482 static int __init da903x_regulator_init(void)
 483 {
 484         return platform_driver_register(&da903x_regulator_driver);
 485 }
 486 subsys_initcall(da903x_regulator_init);
 487
 488 static void __exit da903x_regulator_exit(void)
 489 {
 490         platform_driver_unregister(&da903x_regulator_driver);
 491 }
 492 module_exit(da903x_regulator_exit);
 493
 494 MODULE_LICENSE("GPL");
 495 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
 496               "Mike Rapoport <mike@compulab.co.il>");
 497 MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
 498 MODULE_ALIAS("platform:da903x-regulator");