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/platform_device.h>
  16 #include <linux/regulator/driver.h>
  17 #include <linux/regulator/machine.h>
  18 #include <linux/mfd/da903x.h>
  19
  20 /* DA9030 Registers */
  21 #define DA9030_INVAL            (-1)
  22 #define DA9030_LDO1011          (0x10)
  23 #define DA9030_LDO15            (0x11)
  24 #define DA9030_LDO1416          (0x12)
  25 #define DA9030_LDO1819          (0x13)
  26 #define DA9030_LDO17            (0x14)
  27 #define DA9030_BUCK2DVM1        (0x15)
  28 #define DA9030_BUCK2DVM2        (0x16)
  29 #define DA9030_RCTL11           (0x17)
  30 #define DA9030_RCTL21           (0x18)
  31 #define DA9030_LDO1             (0x90)
  32 #define DA9030_LDO23            (0x91)
  33 #define DA9030_LDO45            (0x92)
  34 #define DA9030_LDO6             (0x93)
  35 #define DA9030_LDO78            (0x94)
  36 #define DA9030_LDO912           (0x95)
  37 #define DA9030_BUCK             (0x96)
  38 #define DA9030_RCTL12           (0x97)
  39 #define DA9030_RCTL22           (0x98)
  40 #define DA9030_LDO_UNLOCK       (0xa0)
  41 #define DA9030_LDO_UNLOCK_MASK  (0xe0)
  42 #define DA9034_OVER1            (0x10)
  43
  44 /* DA9034 Registers */
  45 #define DA9034_INVAL            (-1)
  46 #define DA9034_OVER2            (0x11)
  47 #define DA9034_OVER3            (0x12)
  48 #define DA9034_LDO643           (0x13)
  49 #define DA9034_LDO987           (0x14)
  50 #define DA9034_LDO1110          (0x15)
  51 #define DA9034_LDO1312          (0x16)
  52 #define DA9034_LDO1514          (0x17)
  53 #define DA9034_VCC1             (0x20)
  54 #define DA9034_ADTV1            (0x23)
  55 #define DA9034_ADTV2            (0x24)
  56 #define DA9034_AVRC             (0x25)
  57 #define DA9034_CDTV1            (0x26)
  58 #define DA9034_CDTV2            (0x27)
  59 #define DA9034_CVRC             (0x28)
  60 #define DA9034_SDTV1            (0x29)
  61 #define DA9034_SDTV2            (0x2a)
  62 #define DA9034_SVRC             (0x2b)
  63 #define DA9034_MDTV1            (0x32)
  64 #define DA9034_MDTV2            (0x33)
  65 #define DA9034_MVRC             (0x34)
  66
  67 struct da903x_regulator_info {
  68         struct regulator_desc desc;
  69
  70         int     min_uV;
  71         int     max_uV;
  72         int     step_uV;
  73         int     vol_reg;
  74         int     vol_shift;
  75         int     vol_nbits;
  76         int     update_reg;
  77         int     update_bit;
  78         int     enable_reg;
  79         int     enable_bit;
  80 };
  81
  82 static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
  83 {
  84         return rdev_get_dev(rdev)->parent->parent;
  85 }
  86
  87 static inline int check_range(struct da903x_regulator_info *info,
  88                                 int min_uV, int max_uV)
  89 {
  90         if (min_uV < info->min_uV || min_uV > info->max_uV)
  91                 return -EINVAL;
  92
  93         return 0;
  94 }
  95
  96 /* DA9030/DA9034 common operations */
  97 static int da903x_set_ldo_voltage(struct regulator_dev *rdev,
  98                                   int min_uV, int max_uV)
  99 {
 100         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 101         struct device *da9034_dev = to_da903x_dev(rdev);
 102         uint8_t val, mask;
 103
 104         if (check_range(info, min_uV, max_uV)) {
 105                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 106                 return -EINVAL;
 107         }
 108
 109         val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
 110         val <<= info->vol_shift;
 111         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 112
 113         return da903x_update(da9034_dev, info->vol_reg, val, mask);
 114 }
 115
 116 static int da903x_get_voltage(struct regulator_dev *rdev)
 117 {
 118         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 119         struct device *da9034_dev = to_da903x_dev(rdev);
 120         uint8_t val, mask;
 121         int ret;
 122
 123         ret = da903x_read(da9034_dev, info->vol_reg, &val);
 124         if (ret)
 125                 return ret;
 126
 127         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 128         val = (val & mask) >> info->vol_shift;
 129
 130         return info->min_uV + info->step_uV * val;
 131 }
 132
 133 static int da903x_enable(struct regulator_dev *rdev)
 134 {
 135         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 136         struct device *da9034_dev = to_da903x_dev(rdev);
 137
 138         return da903x_set_bits(da9034_dev, info->enable_reg,
 139                                         1 << info->enable_bit);
 140 }
 141
 142 static int da903x_disable(struct regulator_dev *rdev)
 143 {
 144         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 145         struct device *da9034_dev = to_da903x_dev(rdev);
 146
 147         return da903x_clr_bits(da9034_dev, info->enable_reg,
 148                                         1 << info->enable_bit);
 149 }
 150
 151 static int da903x_is_enabled(struct regulator_dev *rdev)
 152 {
 153         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 154         struct device *da9034_dev = to_da903x_dev(rdev);
 155         uint8_t reg_val;
 156         int ret;
 157
 158         ret = da903x_read(da9034_dev, info->enable_reg, &reg_val);
 159         if (ret)
 160                 return ret;
 161
 162         return !!(reg_val & (1 << info->enable_bit));
 163 }
 164
 165 /* DA9030 specific operations */
 166 static int da9030_set_ldo1_15_voltage(struct regulator_dev *rdev,
 167                                        int min_uV, int max_uV)
 168 {
 169         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 170         struct device *da903x_dev = to_da903x_dev(rdev);
 171         uint8_t val, mask;
 172         int ret;
 173
 174         if (check_range(info, min_uV, max_uV)) {
 175                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 176                 return -EINVAL;
 177         }
 178
 179         val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
 180         val <<= 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_set_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         struct device *da903x_dev = to_da903x_dev(rdev);
 198         uint8_t val, mask;
 199         int thresh;
 200
 201         if (check_range(info, min_uV, max_uV)) {
 202                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 203                 return -EINVAL;
 204         }
 205
 206         thresh = (info->max_uV + info->min_uV) / 2;
 207         if (min_uV < thresh) {
 208                 val = (thresh - min_uV + info->step_uV - 1) / info->step_uV;
 209                 val |= 0x4;
 210         } else {
 211                 val = (min_uV - thresh + info->step_uV - 1) / info->step_uV;
 212         }
 213
 214         val <<= info->vol_shift;
 215         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 216
 217         return da903x_update(da903x_dev, info->vol_reg, val, mask);
 218 }
 219
 220 static int da9030_get_ldo14_voltage(struct regulator_dev *rdev)
 221 {
 222         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 223         struct device *da903x_dev = to_da903x_dev(rdev);
 224         uint8_t val, mask;
 225         int ret;
 226
 227         ret = da903x_read(da903x_dev, info->vol_reg, &val);
 228         if (ret)
 229                 return ret;
 230
 231         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 232         val = (val & mask) >> info->vol_shift;
 233
 234         if (val & 0x4)
 235                 return info->min_uV + info->step_uV * (3 - (val & ~0x4));
 236         else
 237                 return (info->max_uV + info->min_uV) / 2 +
 238                         info->step_uV * (val & ~0x4);
 239 }
 240
 241 /* DA9034 specific operations */
 242 static int da9034_set_dvc_voltage(struct regulator_dev *rdev,
 243                                   int min_uV, int max_uV)
 244 {
 245         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 246         struct device *da9034_dev = to_da903x_dev(rdev);
 247         uint8_t val, mask;
 248         int ret;
 249
 250         if (check_range(info, min_uV, max_uV)) {
 251                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 252                 return -EINVAL;
 253         }
 254
 255         val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
 256         val <<= info->vol_shift;
 257         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 258
 259         ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
 260         if (ret)
 261                 return ret;
 262
 263         ret = da903x_set_bits(da9034_dev, info->update_reg,
 264                                         1 << info->update_bit);
 265         return ret;
 266 }
 267
 268 static int da9034_set_ldo12_voltage(struct regulator_dev *rdev,
 269                                     int min_uV, int max_uV)
 270 {
 271         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 272         struct device *da9034_dev = to_da903x_dev(rdev);
 273         uint8_t val, mask;
 274
 275         if (check_range(info, min_uV, max_uV)) {
 276                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 277                 return -EINVAL;
 278         }
 279
 280         val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
 281         val = (val > 7 || val < 20) ? 8 : val - 12;
 282         val <<= info->vol_shift;
 283         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 284
 285         return da903x_update(da9034_dev, info->vol_reg, val, mask);
 286 }
 287
 288 static int da9034_get_ldo12_voltage(struct regulator_dev *rdev)
 289 {
 290         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 291         struct device *da9034_dev = to_da903x_dev(rdev);
 292         uint8_t val, mask;
 293         int ret;
 294
 295         ret = da903x_read(da9034_dev, info->vol_reg, &val);
 296         if (ret)
 297                 return ret;
 298
 299         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 300         val = (val & mask) >> info->vol_shift;
 301
 302         if (val >= 8)
 303                 return 2700000 + info->step_uV * (val - 8);
 304
 305         return info->min_uV + info->step_uV * val;
 306 }
 307
 308 static struct regulator_ops da903x_regulator_ldo_ops = {
 309         .set_voltage    = da903x_set_ldo_voltage,
 310         .get_voltage    = da903x_get_voltage,
 311         .enable         = da903x_enable,
 312         .disable        = da903x_disable,
 313         .is_enabled     = da903x_is_enabled,
 314 };
 315
 316 /* NOTE: this is dedicated for the insane DA9030 LDO14 */
 317 static struct regulator_ops da9030_regulator_ldo14_ops = {
 318         .set_voltage    = da9030_set_ldo14_voltage,
 319         .get_voltage    = da9030_get_ldo14_voltage,
 320         .enable         = da903x_enable,
 321         .disable        = da903x_disable,
 322         .is_enabled     = da903x_is_enabled,
 323 };
 324
 325 /* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks  */
 326 static struct regulator_ops da9030_regulator_ldo1_15_ops = {
 327         .set_voltage    = da9030_set_ldo1_15_voltage,
 328         .get_voltage    = da903x_get_voltage,
 329         .enable         = da903x_enable,
 330         .disable        = da903x_disable,
 331         .is_enabled     = da903x_is_enabled,
 332 };
 333
 334 static struct regulator_ops da9034_regulator_dvc_ops = {
 335         .set_voltage    = da9034_set_dvc_voltage,
 336         .get_voltage    = da903x_get_voltage,
 337         .enable         = da903x_enable,
 338         .disable        = da903x_disable,
 339         .is_enabled     = da903x_is_enabled,
 340 };
 341
 342 /* NOTE: this is dedicated for the insane LDO12 */
 343 static struct regulator_ops da9034_regulator_ldo12_ops = {
 344         .set_voltage    = da9034_set_ldo12_voltage,
 345         .get_voltage    = da9034_get_ldo12_voltage,
 346         .enable         = da903x_enable,
 347         .disable        = da903x_disable,
 348         .is_enabled     = da903x_is_enabled,
 349 };
 350
 351 #define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit)  \
 352 {                                                                       \
 353         .desc   = {                                                     \
 354                 .name   = "LDO" #_id,                                   \
 355                 .ops    = &da903x_regulator_ldo_ops,                    \
 356                 .type   = REGULATOR_VOLTAGE,                            \
 357                 .id     = _pmic##_ID_LDO##_id,                          \
 358                 .owner  = THIS_MODULE,                                  \
 359         },                                                              \
 360         .min_uV         = (min) * 1000,                                 \
 361         .max_uV         = (max) * 1000,                                 \
 362         .step_uV        = (step) * 1000,                                \
 363         .vol_reg        = _pmic##_##vreg,                               \
 364         .vol_shift      = (shift),                                      \
 365         .vol_nbits      = (nbits),                                      \
 366         .enable_reg     = _pmic##_##ereg,                               \
 367         .enable_bit     = (ebit),                                       \
 368 }
 369
 370 #define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 371 {                                                                       \
 372         .desc   = {                                                     \
 373                 .name   = #_id,                                         \
 374                 .ops    = &da9034_regulator_dvc_ops,                    \
 375                 .type   = REGULATOR_VOLTAGE,                            \
 376                 .id     = DA9034_ID_##_id,                              \
 377                 .owner  = THIS_MODULE,                                  \
 378         },                                                              \
 379         .min_uV         = (min) * 1000,                                 \
 380         .max_uV         = (max) * 1000,                                 \
 381         .step_uV        = (step) * 1000,                                \
 382         .vol_reg        = DA9034_##vreg,                                \
 383         .vol_shift      = (0),                                          \
 384         .vol_nbits      = (nbits),                                      \
 385         .update_reg     = DA9034_##ureg,                                \
 386         .update_bit     = (ubit),                                       \
 387         .enable_reg     = DA9034_##ereg,                                \
 388         .enable_bit     = (ebit),                                       \
 389 }
 390
 391 #define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
 392         DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
 393
 394 #define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
 395         DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
 396
 397 static struct da903x_regulator_info da903x_regulator_info[] = {
 398         /* DA9030 */
 399         DA9030_LDO( 1, 1200, 3200, 100,    LDO1, 0, 5, RCTL12, 1),
 400         DA9030_LDO( 2, 1800, 3200, 100,   LDO23, 0, 4, RCTL12, 2),
 401         DA9030_LDO( 3, 1800, 3200, 100,   LDO23, 4, 4, RCTL12, 3),
 402         DA9030_LDO( 4, 1800, 3200, 100,   LDO45, 0, 4, RCTL12, 4),
 403         DA9030_LDO( 5, 1800, 3200, 100,   LDO45, 4, 4, RCTL12, 5),
 404         DA9030_LDO( 6, 1800, 3200, 100,    LDO6, 0, 4, RCTL12, 6),
 405         DA9030_LDO( 7, 1800, 3200, 100,   LDO78, 0, 4, RCTL12, 7),
 406         DA9030_LDO( 8, 1800, 3200, 100,   LDO78, 4, 4, RCTL22, 0),
 407         DA9030_LDO( 9, 1800, 3200, 100,  LDO912, 0, 4, RCTL22, 1),
 408         DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
 409         DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
 410         DA9030_LDO(12, 1800, 3200, 100,  LDO912, 4, 4, RCTL22, 4),
 411         DA9030_LDO(14, 2760, 2940,  30, LDO1416, 0, 3, RCTL11, 4),
 412         DA9030_LDO(15, 1100, 2650,  50,   LDO15, 0, 5, RCTL11, 5),
 413         DA9030_LDO(16, 1100, 2650,  50, LDO1416, 3, 5, RCTL11, 6),
 414         DA9030_LDO(17, 1800, 3200, 100,   LDO17, 0, 4, RCTL11, 7),
 415         DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
 416         DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
 417         DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
 418
 419         /* DA9034 */
 420         DA9034_DVC(BUCK1, 725, 1500, 25, ADTV1, 5, VCC1, 0, OVER1, 0),
 421         DA9034_DVC(BUCK2, 725, 1500, 25, CDTV1, 5, VCC1, 2, OVER1, 1),
 422         DA9034_DVC(LDO2,  725, 1500, 25, SDTV1, 5, VCC1, 4, OVER1, 2),
 423         DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
 424
 425         DA9034_LDO( 3, 1800, 3300, 100,  LDO643, 0, 4, OVER3, 5),
 426         DA9034_LDO( 4, 1800, 2900,1100,  LDO643, 4, 1, OVER3, 6),
 427         DA9034_LDO( 6, 2500, 2850,  50,  LDO643, 5, 3, OVER2, 0),
 428         DA9034_LDO( 7, 2700, 3050,  50,  LDO987, 0, 3, OVER2, 1),
 429         DA9034_LDO( 8, 2700, 2850,  50,  LDO987, 3, 2, OVER2, 2),
 430         DA9034_LDO( 9, 2700, 3050,  50,  LDO987, 5, 3, OVER2, 3),
 431         DA9034_LDO(10, 2700, 3050,  50, LDO1110, 0, 3, OVER2, 4),
 432         DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
 433         DA9034_LDO(12, 1700, 3050,  50, LDO1312, 0, 4, OVER3, 6),
 434         DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
 435         DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
 436         DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
 437         DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
 438 };
 439
 440 static inline struct da903x_regulator_info *find_regulator_info(int id)
 441 {
 442         struct da903x_regulator_info *ri;
 443         int i;
 444
 445         for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
 446                 ri = &da903x_regulator_info[i];
 447                 if (ri->desc.id == id)
 448                         return ri;
 449         }
 450         return NULL;
 451 }
 452
 453 static int __devinit da903x_regulator_probe(struct platform_device *pdev)
 454 {
 455         struct da903x_regulator_info *ri = NULL;
 456         struct regulator_dev *rdev;
 457
 458         ri = find_regulator_info(pdev->id);
 459         if (ri == NULL) {
 460                 dev_err(&pdev->dev, "invalid regulator ID specified\n");
 461                 return -EINVAL;
 462         }
 463
 464         /* Workaround for the weird LDO12 voltage setting */
 465         if (ri->desc.id == DA9034_ID_LDO12)
 466                 ri->desc.ops = &da9034_regulator_ldo12_ops;
 467
 468         if (ri->desc.id == DA9030_ID_LDO14)
 469                 ri->desc.ops = &da9030_regulator_ldo14_ops;
 470
 471         if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
 472                 ri->desc.ops = &da9030_regulator_ldo1_15_ops;
 473
 474         rdev = regulator_register(&ri->desc, &pdev->dev, ri);
 475         if (IS_ERR(rdev)) {
 476                 dev_err(&pdev->dev, "failed to register regulator %s\n",
 477                                 ri->desc.name);
 478                 return PTR_ERR(rdev);
 479         }
 480
 481         platform_set_drvdata(pdev, rdev);
 482         return 0;
 483 }
 484
 485 static int __devexit da903x_regulator_remove(struct platform_device *pdev)
 486 {
 487         struct regulator_dev *rdev = platform_get_drvdata(pdev);
 488
 489         regulator_unregister(rdev);
 490         return 0;
 491 }
 492
 493 static struct platform_driver da903x_regulator_driver = {
 494         .driver = {
 495                 .name   = "da903x-regulator",
 496                 .owner  = THIS_MODULE,
 497         },
 498         .probe          = da903x_regulator_probe,
 499         .remove         = da903x_regulator_remove,
 500 };
 501
 502 static int __init da903x_regulator_init(void)
 503 {
 504         return platform_driver_register(&da903x_regulator_driver);
 505 }
 506 module_init(da903x_regulator_init);
 507
 508 static void __exit da903x_regulator_exit(void)
 509 {
 510         platform_driver_unregister(&da903x_regulator_driver);
 511 }
 512 module_exit(da903x_regulator_exit);
 513
 514 MODULE_LICENSE("GPL");
 515 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
 516               "Mike Rapoport <mike@compulab.co.il>");
 517 MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
 518 MODULE_ALIAS("platform:da903x-regulator");