drivers/regulator/twl-regulator.c

   1 /*
   2  * twl-regulator.c -- support regulators in twl4030/twl6030 family chips
   3  *
   4  * Copyright (C) 2008 David Brownell
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/err.h>
  15 #include <linux/delay.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/regulator/driver.h>
  18 #include <linux/regulator/machine.h>
  19 #include <linux/i2c/twl.h>
  20
  21
  22 /*
  23  * The TWL4030/TW5030/TPS659x0/TWL6030 family chips include power management, a
  24  * USB OTG transceiver, an RTC, ADC, PWM, and lots more.  Some versions
  25  * include an audio codec, battery charger, and more voltage regulators.
  26  * These chips are often used in OMAP-based systems.
  27  *
  28  * This driver implements software-based resource control for various
  29  * voltage regulators.  This is usually augmented with state machine
  30  * based control.
  31  */
  32
  33 struct twlreg_info {
  34         /* start of regulator's PM_RECEIVER control register bank */
  35         u8                      base;
  36
  37         /* twl resource ID, for resource control state machine */
  38         u8                      id;
  39
  40         /* voltage in mV = table[VSEL]; table_len must be a power-of-two */
  41         u8                      table_len;
  42         const u16               *table;
  43
  44         /* regulator specific turn-on delay */
  45         u16                     delay;
  46
  47         /* State REMAP default configuration */
  48         u8                      remap;
  49
  50         /* chip constraints on regulator behavior */
  51         u16                     min_mV;
  52         u16                     max_mV;
  53
  54         u8                      flags;
  55
  56         /* used by regulator core */
  57         struct regulator_desc   desc;
  58
  59         /* chip specific features */
  60         unsigned long           features;
  61
  62         /*
  63          * optional override functions for voltage set/get
  64          * these are currently only used for SMPS regulators
  65          */
  66         int                     (*get_voltage)(void *data);
  67         int                     (*set_voltage)(void *data, int target_uV);
  68
  69         /* data passed from board for external get/set voltage */
  70         void                    *data;
  71 };
  72
  73
  74 /* LDO control registers ... offset is from the base of its register bank.
  75  * The first three registers of all power resource banks help hardware to
  76  * manage the various resource groups.
  77  */
  78 /* Common offset in TWL4030/6030 */
  79 #define VREG_GRP                0
  80 /* TWL4030 register offsets */
  81 #define VREG_TYPE               1
  82 #define VREG_REMAP              2
  83 #define VREG_DEDICATED          3       /* LDO control */
  84 #define VREG_VOLTAGE_SMPS_4030  9
  85 /* TWL6030 register offsets */
  86 #define VREG_TRANS              1
  87 #define VREG_STATE              2
  88 #define VREG_VOLTAGE            3
  89 #define VREG_VOLTAGE_SMPS       4
  90 /* TWL6030 Misc register offsets */
  91 #define VREG_BC_ALL             1
  92 #define VREG_BC_REF             2
  93 #define VREG_BC_PROC            3
  94 #define VREG_BC_CLK_RST         4
  95
  96 /* TWL6030 LDO register values for CFG_STATE */
  97 #define TWL6030_CFG_STATE_OFF   0x00
  98 #define TWL6030_CFG_STATE_ON    0x01
  99 #define TWL6030_CFG_STATE_OFF2  0x02
 100 #define TWL6030_CFG_STATE_SLEEP 0x03
 101 #define TWL6030_CFG_STATE_GRP_SHIFT     5
 102 #define TWL6030_CFG_STATE_APP_SHIFT     2
 103 #define TWL6030_CFG_STATE_APP_MASK      (0x03 << TWL6030_CFG_STATE_APP_SHIFT)
 104 #define TWL6030_CFG_STATE_APP(v)        (((v) & TWL6030_CFG_STATE_APP_MASK) >>\
 105                                                 TWL6030_CFG_STATE_APP_SHIFT)
 106
 107 /* Flags for SMPS Voltage reading */
 108 #define SMPS_OFFSET_EN          BIT(0)
 109 #define SMPS_EXTENDED_EN        BIT(1)
 110
 111 /* twl6025 SMPS EPROM values */
 112 #define TWL6030_SMPS_OFFSET             0xB0
 113 #define TWL6030_SMPS_MULT               0xB3
 114 #define SMPS_MULTOFFSET_SMPS4   BIT(0)
 115 #define SMPS_MULTOFFSET_VIO     BIT(1)
 116 #define SMPS_MULTOFFSET_SMPS3   BIT(6)
 117
 118 static inline int
 119 twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
 120 {
 121         u8 value;
 122         int status;
 123
 124         status = twl_i2c_read_u8(slave_subgp,
 125                         &value, info->base + offset);
 126         return (status < 0) ? status : value;
 127 }
 128
 129 static inline int
 130 twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
 131                                                  u8 value)
 132 {
 133         return twl_i2c_write_u8(slave_subgp,
 134                         value, info->base + offset);
 135 }
 136
 137 /*----------------------------------------------------------------------*/
 138
 139 /* generic power resource operations, which work on all regulators */
 140
 141 static int twlreg_grp(struct regulator_dev *rdev)
 142 {
 143         return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
 144                                                                  VREG_GRP);
 145 }
 146
 147 /*
 148  * Enable/disable regulators by joining/leaving the P1 (processor) group.
 149  * We assume nobody else is updating the DEV_GRP registers.
 150  */
 151 /* definition for 4030 family */
 152 #define P3_GRP_4030     BIT(7)          /* "peripherals" */
 153 #define P2_GRP_4030     BIT(6)          /* secondary processor, modem, etc */
 154 #define P1_GRP_4030     BIT(5)          /* CPU/Linux */
 155 /* definition for 6030 family */
 156 #define P3_GRP_6030     BIT(2)          /* secondary processor, modem, etc */
 157 #define P2_GRP_6030     BIT(1)          /* "peripherals" */
 158 #define P1_GRP_6030     BIT(0)          /* CPU/Linux */
 159
 160 static int twl4030reg_is_enabled(struct regulator_dev *rdev)
 161 {
 162         int     state = twlreg_grp(rdev);
 163
 164         if (state < 0)
 165                 return state;
 166
 167         return state & P1_GRP_4030;
 168 }
 169
 170 static int twl6030reg_is_enabled(struct regulator_dev *rdev)
 171 {
 172         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 173         int                     grp = 0, val;
 174
 175         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 176                 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 177         if (grp < 0)
 178                 return grp;
 179
 180         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 181                 grp &= P1_GRP_6030;
 182         else
 183                 grp = 1;
 184
 185         val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
 186         val = TWL6030_CFG_STATE_APP(val);
 187
 188         return grp && (val == TWL6030_CFG_STATE_ON);
 189 }
 190
 191 static int twl4030reg_enable(struct regulator_dev *rdev)
 192 {
 193         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 194         int                     grp;
 195         int                     ret;
 196
 197         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 198         if (grp < 0)
 199                 return grp;
 200
 201         grp |= P1_GRP_4030;
 202
 203         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 204
 205         udelay(info->delay);
 206
 207         return ret;
 208 }
 209
 210 static int twl6030reg_enable(struct regulator_dev *rdev)
 211 {
 212         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 213         int                     grp = 0;
 214         int                     ret;
 215
 216         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 217                 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 218         if (grp < 0)
 219                 return grp;
 220
 221         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 222                         grp << TWL6030_CFG_STATE_GRP_SHIFT |
 223                         TWL6030_CFG_STATE_ON);
 224
 225         udelay(info->delay);
 226
 227         return ret;
 228 }
 229
 230 static int twl4030reg_disable(struct regulator_dev *rdev)
 231 {
 232         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 233         int                     grp;
 234         int                     ret;
 235
 236         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 237         if (grp < 0)
 238                 return grp;
 239
 240         grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
 241
 242         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 243
 244         return ret;
 245 }
 246
 247 static int twl6030reg_disable(struct regulator_dev *rdev)
 248 {
 249         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 250         int                     grp = 0;
 251         int                     ret;
 252
 253         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 254                 grp = P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030;
 255
 256         /* For 6030, set the off state for all grps enabled */
 257         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 258                         (grp) << TWL6030_CFG_STATE_GRP_SHIFT |
 259                         TWL6030_CFG_STATE_OFF);
 260
 261         return ret;
 262 }
 263
 264 static int twl4030reg_get_status(struct regulator_dev *rdev)
 265 {
 266         int     state = twlreg_grp(rdev);
 267
 268         if (state < 0)
 269                 return state;
 270         state &= 0x0f;
 271
 272         /* assume state != WARM_RESET; we'd not be running...  */
 273         if (!state)
 274                 return REGULATOR_STATUS_OFF;
 275         return (state & BIT(3))
 276                 ? REGULATOR_STATUS_NORMAL
 277                 : REGULATOR_STATUS_STANDBY;
 278 }
 279
 280 static int twl6030reg_get_status(struct regulator_dev *rdev)
 281 {
 282         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 283         int                     val;
 284
 285         val = twlreg_grp(rdev);
 286         if (val < 0)
 287                 return val;
 288
 289         val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
 290
 291         switch (TWL6030_CFG_STATE_APP(val)) {
 292         case TWL6030_CFG_STATE_ON:
 293                 return REGULATOR_STATUS_NORMAL;
 294
 295         case TWL6030_CFG_STATE_SLEEP:
 296                 return REGULATOR_STATUS_STANDBY;
 297
 298         case TWL6030_CFG_STATE_OFF:
 299         case TWL6030_CFG_STATE_OFF2:
 300         default:
 301                 break;
 302         }
 303
 304         return REGULATOR_STATUS_OFF;
 305 }
 306
 307 static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 308 {
 309         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 310         unsigned                message;
 311         int                     status;
 312
 313         /* We can only set the mode through state machine commands... */
 314         switch (mode) {
 315         case REGULATOR_MODE_NORMAL:
 316                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
 317                 break;
 318         case REGULATOR_MODE_STANDBY:
 319                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
 320                 break;
 321         default:
 322                 return -EINVAL;
 323         }
 324
 325         /* Ensure the resource is associated with some group */
 326         status = twlreg_grp(rdev);
 327         if (status < 0)
 328                 return status;
 329         if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
 330                 return -EACCES;
 331
 332         status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 333                         message >> 8, TWL4030_PM_MASTER_PB_WORD_MSB);
 334         if (status < 0)
 335                 return status;
 336
 337         return twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 338                         message & 0xff, TWL4030_PM_MASTER_PB_WORD_LSB);
 339 }
 340
 341 static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 342 {
 343         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 344         int grp = 0;
 345         int val;
 346
 347         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 348                 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 349
 350         if (grp < 0)
 351                 return grp;
 352
 353         /* Compose the state register settings */
 354         val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
 355         /* We can only set the mode through state machine commands... */
 356         switch (mode) {
 357         case REGULATOR_MODE_NORMAL:
 358                 val |= TWL6030_CFG_STATE_ON;
 359                 break;
 360         case REGULATOR_MODE_STANDBY:
 361                 val |= TWL6030_CFG_STATE_SLEEP;
 362                 break;
 363
 364         default:
 365                 return -EINVAL;
 366         }
 367
 368         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
 369 }
 370
 371 /*----------------------------------------------------------------------*/
 372
 373 /*
 374  * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
 375  * select field in its control register.   We use tables indexed by VSEL
 376  * to record voltages in milliVolts.  (Accuracy is about three percent.)
 377  *
 378  * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
 379  * currently handled by listing two slightly different VAUX2 regulators,
 380  * only one of which will be configured.
 381  *
 382  * VSEL values documented as "TI cannot support these values" are flagged
 383  * in these tables as UNSUP() values; we normally won't assign them.
 384  *
 385  * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
 386  * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
 387  */
 388 #ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
 389 #define UNSUP_MASK      0x0000
 390 #else
 391 #define UNSUP_MASK      0x8000
 392 #endif
 393
 394 #define UNSUP(x)        (UNSUP_MASK | (x))
 395 #define IS_UNSUP(x)     (UNSUP_MASK & (x))
 396 #define LDO_MV(x)       (~UNSUP_MASK & (x))
 397
 398
 399 static const u16 VAUX1_VSEL_table[] = {
 400         UNSUP(1500), UNSUP(1800), 2500, 2800,
 401         3000, 3000, 3000, 3000,
 402 };
 403 static const u16 VAUX2_4030_VSEL_table[] = {
 404         UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
 405         1500, 1800, UNSUP(1850), 2500,
 406         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 407         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 408 };
 409 static const u16 VAUX2_VSEL_table[] = {
 410         1700, 1700, 1900, 1300,
 411         1500, 1800, 2000, 2500,
 412         2100, 2800, 2200, 2300,
 413         2400, 2400, 2400, 2400,
 414 };
 415 static const u16 VAUX3_VSEL_table[] = {
 416         1500, 1800, 2500, 2800,
 417         3000, 3000, 3000, 3000,
 418 };
 419 static const u16 VAUX4_VSEL_table[] = {
 420         700, 1000, 1200, UNSUP(1300),
 421         1500, 1800, UNSUP(1850), 2500,
 422         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 423         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 424 };
 425 static const u16 VMMC1_VSEL_table[] = {
 426         1850, 2850, 3000, 3150,
 427 };
 428 static const u16 VMMC2_VSEL_table[] = {
 429         UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
 430         UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
 431         2600, 2800, 2850, 3000,
 432         3150, 3150, 3150, 3150,
 433 };
 434 static const u16 VPLL1_VSEL_table[] = {
 435         1000, 1200, 1300, 1800,
 436         UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
 437 };
 438 static const u16 VPLL2_VSEL_table[] = {
 439         700, 1000, 1200, 1300,
 440         UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
 441         UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
 442         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 443 };
 444 static const u16 VSIM_VSEL_table[] = {
 445         UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
 446         2800, 3000, 3000, 3000,
 447 };
 448 static const u16 VDAC_VSEL_table[] = {
 449         1200, 1300, 1800, 1800,
 450 };
 451 static const u16 VDD1_VSEL_table[] = {
 452         800, 1450,
 453 };
 454 static const u16 VDD2_VSEL_table[] = {
 455         800, 1450, 1500,
 456 };
 457 static const u16 VIO_VSEL_table[] = {
 458         1800, 1850,
 459 };
 460 static const u16 VINTANA2_VSEL_table[] = {
 461         2500, 2750,
 462 };
 463
 464 static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 465 {
 466         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 467         int                     mV = info->table[index];
 468
 469         return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
 470 }
 471
 472 static int
 473 twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 474                        unsigned *selector)
 475 {
 476         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 477         int                     vsel;
 478
 479         for (vsel = 0; vsel < info->table_len; vsel++) {
 480                 int mV = info->table[vsel];
 481                 int uV;
 482
 483                 if (IS_UNSUP(mV))
 484                         continue;
 485                 uV = LDO_MV(mV) * 1000;
 486
 487                 /* REVISIT for VAUX2, first match may not be best/lowest */
 488
 489                 /* use the first in-range value */
 490                 if (min_uV <= uV && uV <= max_uV) {
 491                         *selector = vsel;
 492                         return twlreg_write(info, TWL_MODULE_PM_RECEIVER,
 493                                                         VREG_VOLTAGE, vsel);
 494                 }
 495         }
 496
 497         return -EDOM;
 498 }
 499
 500 static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
 501 {
 502         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 503         int             vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 504                                                                 VREG_VOLTAGE);
 505
 506         if (vsel < 0)
 507                 return vsel;
 508
 509         vsel &= info->table_len - 1;
 510         return LDO_MV(info->table[vsel]) * 1000;
 511 }
 512
 513 static struct regulator_ops twl4030ldo_ops = {
 514         .list_voltage   = twl4030ldo_list_voltage,
 515
 516         .set_voltage    = twl4030ldo_set_voltage,
 517         .get_voltage    = twl4030ldo_get_voltage,
 518
 519         .enable         = twl4030reg_enable,
 520         .disable        = twl4030reg_disable,
 521         .is_enabled     = twl4030reg_is_enabled,
 522
 523         .set_mode       = twl4030reg_set_mode,
 524
 525         .get_status     = twl4030reg_get_status,
 526 };
 527
 528 static int
 529 twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 530                         unsigned *selector)
 531 {
 532         struct twlreg_info *info = rdev_get_drvdata(rdev);
 533         int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
 534
 535         if (info->set_voltage) {
 536                 return info->set_voltage(info->data, min_uV);
 537         } else {
 538                 twlreg_write(info, TWL_MODULE_PM_RECEIVER,
 539                         VREG_VOLTAGE_SMPS_4030, vsel);
 540         }
 541
 542         return 0;
 543 }
 544
 545 static int twl4030smps_get_voltage(struct regulator_dev *rdev)
 546 {
 547         struct twlreg_info *info = rdev_get_drvdata(rdev);
 548         int vsel;
 549
 550         if (info->get_voltage)
 551                 return info->get_voltage(info->data);
 552
 553         vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 554                 VREG_VOLTAGE_SMPS_4030);
 555
 556         return vsel * 12500 + 600000;
 557 }
 558
 559 static struct regulator_ops twl4030smps_ops = {
 560         .set_voltage    = twl4030smps_set_voltage,
 561         .get_voltage    = twl4030smps_get_voltage,
 562 };
 563
 564 static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 565 {
 566         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 567
 568         return ((info->min_mV + (index * 100)) * 1000);
 569 }
 570
 571 static int
 572 twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 573                        unsigned *selector)
 574 {
 575         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 576         int                     vsel;
 577
 578         if ((min_uV/1000 < info->min_mV) || (max_uV/1000 > info->max_mV))
 579                 return -EDOM;
 580
 581         /*
 582          * Use the below formula to calculate vsel
 583          * mV = 1000mv + 100mv * (vsel - 1)
 584          */
 585         vsel = (min_uV/1000 - 1000)/100 + 1;
 586         *selector = vsel;
 587         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel);
 588
 589 }
 590
 591 static int twl6030ldo_get_voltage(struct regulator_dev *rdev)
 592 {
 593         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 594         int             vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 595                                                                 VREG_VOLTAGE);
 596
 597         if (vsel < 0)
 598                 return vsel;
 599
 600         /*
 601          * Use the below formula to calculate vsel
 602          * mV = 1000mv + 100mv * (vsel - 1)
 603          */
 604         return (1000 + (100 * (vsel - 1))) * 1000;
 605 }
 606
 607 static struct regulator_ops twl6030ldo_ops = {
 608         .list_voltage   = twl6030ldo_list_voltage,
 609
 610         .set_voltage    = twl6030ldo_set_voltage,
 611         .get_voltage    = twl6030ldo_get_voltage,
 612
 613         .enable         = twl6030reg_enable,
 614         .disable        = twl6030reg_disable,
 615         .is_enabled     = twl6030reg_is_enabled,
 616
 617         .set_mode       = twl6030reg_set_mode,
 618
 619         .get_status     = twl6030reg_get_status,
 620 };
 621
 622 /*----------------------------------------------------------------------*/
 623
 624 /*
 625  * Fixed voltage LDOs don't have a VSEL field to update.
 626  */
 627 static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index)
 628 {
 629         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 630
 631         return info->min_mV * 1000;
 632 }
 633
 634 static int twlfixed_get_voltage(struct regulator_dev *rdev)
 635 {
 636         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 637
 638         return info->min_mV * 1000;
 639 }
 640
 641 static struct regulator_ops twl4030fixed_ops = {
 642         .list_voltage   = twlfixed_list_voltage,
 643
 644         .get_voltage    = twlfixed_get_voltage,
 645
 646         .enable         = twl4030reg_enable,
 647         .disable        = twl4030reg_disable,
 648         .is_enabled     = twl4030reg_is_enabled,
 649
 650         .set_mode       = twl4030reg_set_mode,
 651
 652         .get_status     = twl4030reg_get_status,
 653 };
 654
 655 static struct regulator_ops twl6030fixed_ops = {
 656         .list_voltage   = twlfixed_list_voltage,
 657
 658         .get_voltage    = twlfixed_get_voltage,
 659
 660         .enable         = twl6030reg_enable,
 661         .disable        = twl6030reg_disable,
 662         .is_enabled     = twl6030reg_is_enabled,
 663
 664         .set_mode       = twl6030reg_set_mode,
 665
 666         .get_status     = twl6030reg_get_status,
 667 };
 668
 669 static struct regulator_ops twl6030_fixed_resource = {
 670         .enable         = twl6030reg_enable,
 671         .disable        = twl6030reg_disable,
 672         .is_enabled     = twl6030reg_is_enabled,
 673         .get_status     = twl6030reg_get_status,
 674 };
 675
 676 /*
 677  * SMPS status and control
 678  */
 679
 680 static int twl6030smps_list_voltage(struct regulator_dev *rdev, unsigned index)
 681 {
 682         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 683
 684         int voltage = 0;
 685
 686         switch (info->flags) {
 687         case SMPS_OFFSET_EN:
 688                 voltage = 100000;
 689                 /* fall through */
 690         case 0:
 691                 switch (index) {
 692                 case 0:
 693                         voltage = 0;
 694                         break;
 695                 case 58:
 696                         voltage = 1350 * 1000;
 697                         break;
 698                 case 59:
 699                         voltage = 1500 * 1000;
 700                         break;
 701                 case 60:
 702                         voltage = 1800 * 1000;
 703                         break;
 704                 case 61:
 705                         voltage = 1900 * 1000;
 706                         break;
 707                 case 62:
 708                         voltage = 2100 * 1000;
 709                         break;
 710                 default:
 711                         voltage += (600000 + (12500 * (index - 1)));
 712                 }
 713                 break;
 714         case SMPS_EXTENDED_EN:
 715                 switch (index) {
 716                 case 0:
 717                         voltage = 0;
 718                         break;
 719                 case 58:
 720                         voltage = 2084 * 1000;
 721                         break;
 722                 case 59:
 723                         voltage = 2315 * 1000;
 724                         break;
 725                 case 60:
 726                         voltage = 2778 * 1000;
 727                         break;
 728                 case 61:
 729                         voltage = 2932 * 1000;
 730                         break;
 731                 case 62:
 732                         voltage = 3241 * 1000;
 733                         break;
 734                 default:
 735                         voltage = (1852000 + (38600 * (index - 1)));
 736                 }
 737                 break;
 738         case SMPS_OFFSET_EN | SMPS_EXTENDED_EN:
 739                 switch (index) {
 740                 case 0:
 741                         voltage = 0;
 742                         break;
 743                 case 58:
 744                         voltage = 4167 * 1000;
 745                         break;
 746                 case 59:
 747                         voltage = 2315 * 1000;
 748                         break;
 749                 case 60:
 750                         voltage = 2778 * 1000;
 751                         break;
 752                 case 61:
 753                         voltage = 2932 * 1000;
 754                         break;
 755                 case 62:
 756                         voltage = 3241 * 1000;
 757                         break;
 758                 default:
 759                         voltage = (2161000 + (38600 * (index - 1)));
 760                 }
 761                 break;
 762         }
 763
 764         return voltage;
 765 }
 766
 767 static int
 768 twl6030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 769                         unsigned int *selector)
 770 {
 771         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 772         int     vsel = 0;
 773
 774         switch (info->flags) {
 775         case 0:
 776                 if (min_uV == 0)
 777                         vsel = 0;
 778                 else if ((min_uV >= 600000) && (max_uV <= 1300000)) {
 779                         vsel = (min_uV - 600000) / 125;
 780                         if (vsel % 100)
 781                                 vsel += 100;
 782                         vsel /= 100;
 783                         vsel++;
 784                 }
 785                 /* Values 1..57 for vsel are linear and can be calculated
 786                  * values 58..62 are non linear.
 787                  */
 788                 else if ((min_uV > 1900000) && (max_uV >= 2100000))
 789                         vsel = 62;
 790                 else if ((min_uV > 1800000) && (max_uV >= 1900000))
 791                         vsel = 61;
 792                 else if ((min_uV > 1500000) && (max_uV >= 1800000))
 793                         vsel = 60;
 794                 else if ((min_uV > 1350000) && (max_uV >= 1500000))
 795                         vsel = 59;
 796                 else if ((min_uV > 1300000) && (max_uV >= 1350000))
 797                         vsel = 58;
 798                 else
 799                         return -EINVAL;
 800                 break;
 801         case SMPS_OFFSET_EN:
 802                 if (min_uV == 0)
 803                         vsel = 0;
 804                 else if ((min_uV >= 700000) && (max_uV <= 1420000)) {
 805                         vsel = (min_uV - 700000) / 125;
 806                         if (vsel % 100)
 807                                 vsel += 100;
 808                         vsel /= 100;
 809                         vsel++;
 810                 }
 811                 /* Values 1..57 for vsel are linear and can be calculated
 812                  * values 58..62 are non linear.
 813                  */
 814                 else if ((min_uV > 1900000) && (max_uV >= 2100000))
 815                         vsel = 62;
 816                 else if ((min_uV > 1800000) && (max_uV >= 1900000))
 817                         vsel = 61;
 818                 else if ((min_uV > 1350000) && (max_uV >= 1800000))
 819                         vsel = 60;
 820                 else if ((min_uV > 1350000) && (max_uV >= 1500000))
 821                         vsel = 59;
 822                 else if ((min_uV > 1300000) && (max_uV >= 1350000))
 823                         vsel = 58;
 824                 else
 825                         return -EINVAL;
 826                 break;
 827         case SMPS_EXTENDED_EN:
 828                 if (min_uV == 0)
 829                         vsel = 0;
 830                 else if ((min_uV >= 1852000) && (max_uV <= 4013600)) {
 831                         vsel = (min_uV - 1852000) / 386;
 832                         if (vsel % 100)
 833                                 vsel += 100;
 834                         vsel /= 100;
 835                         vsel++;
 836                 }
 837                 break;
 838         case SMPS_OFFSET_EN|SMPS_EXTENDED_EN:
 839                 if (min_uV == 0)
 840                         vsel = 0;
 841                 else if ((min_uV >= 2161000) && (max_uV <= 4321000)) {
 842                         vsel = (min_uV - 1852000) / 386;
 843                         if (vsel % 100)
 844                                 vsel += 100;
 845                         vsel /= 100;
 846                         vsel++;
 847                 }
 848                 break;
 849         }
 850
 851         *selector = vsel;
 852
 853         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS,
 854                                                         vsel);
 855 }
 856
 857 static int twl6030smps_get_voltage_sel(struct regulator_dev *rdev)
 858 {
 859         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 860
 861         return twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS);
 862 }
 863
 864 static struct regulator_ops twlsmps_ops = {
 865         .list_voltage           = twl6030smps_list_voltage,
 866
 867         .set_voltage            = twl6030smps_set_voltage,
 868         .get_voltage_sel        = twl6030smps_get_voltage_sel,
 869
 870         .enable                 = twl6030reg_enable,
 871         .disable                = twl6030reg_disable,
 872         .is_enabled             = twl6030reg_is_enabled,
 873
 874         .set_mode               = twl6030reg_set_mode,
 875
 876         .get_status             = twl6030reg_get_status,
 877 };
 878
 879 /*----------------------------------------------------------------------*/
 880
 881 #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 882                         remap_conf) \
 883                 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 884                         remap_conf, TWL4030, twl4030fixed_ops)
 885 #define TWL6030_FIXED_LDO(label, offset, mVolts, turnon_delay) \
 886                 TWL_FIXED_LDO(label, offset, mVolts, 0x0, turnon_delay, \
 887                         0x0, TWL6030, twl6030fixed_ops)
 888
 889 #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) { \
 890         .base = offset, \
 891         .id = num, \
 892         .table_len = ARRAY_SIZE(label##_VSEL_table), \
 893         .table = label##_VSEL_table, \
 894         .delay = turnon_delay, \
 895         .remap = remap_conf, \
 896         .desc = { \
 897                 .name = #label, \
 898                 .id = TWL4030_REG_##label, \
 899                 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
 900                 .ops = &twl4030ldo_ops, \
 901                 .type = REGULATOR_VOLTAGE, \
 902                 .owner = THIS_MODULE, \
 903                 }, \
 904         }
 905
 906 #define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf) \
 907         { \
 908         .base = offset, \
 909         .id = num, \
 910         .delay = turnon_delay, \
 911         .remap = remap_conf, \
 912         .desc = { \
 913                 .name = #label, \
 914                 .id = TWL4030_REG_##label, \
 915                 .ops = &twl4030smps_ops, \
 916                 .type = REGULATOR_VOLTAGE, \
 917                 .owner = THIS_MODULE, \
 918                 }, \
 919         }
 920
 921 #define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) { \
 922         .base = offset, \
 923         .min_mV = min_mVolts, \
 924         .max_mV = max_mVolts, \
 925         .desc = { \
 926                 .name = #label, \
 927                 .id = TWL6030_REG_##label, \
 928                 .n_voltages = (max_mVolts - min_mVolts)/100 + 1, \
 929                 .ops = &twl6030ldo_ops, \
 930                 .type = REGULATOR_VOLTAGE, \
 931                 .owner = THIS_MODULE, \
 932                 }, \
 933         }
 934
 935 #define TWL6025_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) { \
 936         .base = offset, \
 937         .min_mV = min_mVolts, \
 938         .max_mV = max_mVolts, \
 939         .desc = { \
 940                 .name = #label, \
 941                 .id = TWL6025_REG_##label, \
 942                 .n_voltages = ((max_mVolts - min_mVolts)/100) + 1, \
 943                 .ops = &twl6030ldo_ops, \
 944                 .type = REGULATOR_VOLTAGE, \
 945                 .owner = THIS_MODULE, \
 946                 }, \
 947         }
 948
 949 #define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
 950                 family, operations) { \
 951         .base = offset, \
 952         .id = num, \
 953         .min_mV = mVolts, \
 954         .delay = turnon_delay, \
 955         .remap = remap_conf, \
 956         .desc = { \
 957                 .name = #label, \
 958                 .id = family##_REG_##label, \
 959                 .n_voltages = 1, \
 960                 .ops = &operations, \
 961                 .type = REGULATOR_VOLTAGE, \
 962                 .owner = THIS_MODULE, \
 963                 }, \
 964         }
 965
 966 #define TWL6030_FIXED_RESOURCE(label, offset, turnon_delay) { \
 967         .base = offset, \
 968         .delay = turnon_delay, \
 969         .desc = { \
 970                 .name = #label, \
 971                 .id = TWL6030_REG_##label, \
 972                 .ops = &twl6030_fixed_resource, \
 973                 .type = REGULATOR_VOLTAGE, \
 974                 .owner = THIS_MODULE, \
 975                 }, \
 976         }
 977
 978 #define TWL6025_ADJUSTABLE_SMPS(label, offset) { \
 979         .base = offset, \
 980         .min_mV = 600, \
 981         .max_mV = 2100, \
 982         .desc = { \
 983                 .name = #label, \
 984                 .id = TWL6025_REG_##label, \
 985                 .n_voltages = 63, \
 986                 .ops = &twlsmps_ops, \
 987                 .type = REGULATOR_VOLTAGE, \
 988                 .owner = THIS_MODULE, \
 989                 }, \
 990         }
 991
 992 /*
 993  * We list regulators here if systems need some level of
 994  * software control over them after boot.
 995  */
 996 static struct twlreg_info twl_regs[] = {
 997         TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08),
 998         TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08),
 999         TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08),
1000         TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08),
1001         TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08),
1002         TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08),
1003         TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08),
1004         TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00),
1005         TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08),
1006         TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00),
1007         TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08),
1008         TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08),
1009         TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08),
1010         TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08),
1011         TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08),
1012         TWL4030_ADJUSTABLE_SMPS(VDD1, 0x55, 15, 1000, 0x08),
1013         TWL4030_ADJUSTABLE_SMPS(VDD2, 0x63, 16, 1000, 0x08),
1014         TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08),
1015         TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08),
1016         TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08),
1017         /* VUSBCP is managed *only* by the USB subchip */
1018
1019         /* 6030 REG with base as PMC Slave Misc : 0x0030 */
1020         /* Turnon-delay and remap configuration values for 6030 are not
1021            verified since the specification is not public */
1022         TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300),
1023         TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300),
1024         TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300),
1025         TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300),
1026         TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300),
1027         TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300),
1028         TWL6030_FIXED_LDO(VANA, 0x50, 2100, 0),
1029         TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 0),
1030         TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 0),
1031         TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 0),
1032         TWL6030_FIXED_RESOURCE(CLK32KG, 0x8C, 0),
1033
1034         /* 6025 are renamed compared to 6030 versions */
1035         TWL6025_ADJUSTABLE_LDO(LDO2, 0x54, 1000, 3300),
1036         TWL6025_ADJUSTABLE_LDO(LDO4, 0x58, 1000, 3300),
1037         TWL6025_ADJUSTABLE_LDO(LDO3, 0x5c, 1000, 3300),
1038         TWL6025_ADJUSTABLE_LDO(LDO5, 0x68, 1000, 3300),
1039         TWL6025_ADJUSTABLE_LDO(LDO1, 0x6c, 1000, 3300),
1040         TWL6025_ADJUSTABLE_LDO(LDO7, 0x74, 1000, 3300),
1041         TWL6025_ADJUSTABLE_LDO(LDO6, 0x60, 1000, 3300),
1042         TWL6025_ADJUSTABLE_LDO(LDOLN, 0x64, 1000, 3300),
1043         TWL6025_ADJUSTABLE_LDO(LDOUSB, 0x70, 1000, 3300),
1044
1045         TWL6025_ADJUSTABLE_SMPS(SMPS3, 0x34),
1046         TWL6025_ADJUSTABLE_SMPS(SMPS4, 0x10),
1047         TWL6025_ADJUSTABLE_SMPS(VIO, 0x16),
1048 };
1049
1050 static u8 twl_get_smps_offset(void)
1051 {
1052         u8 value;
1053
1054         twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
1055                         TWL6030_SMPS_OFFSET);
1056         return value;
1057 }
1058
1059 static u8 twl_get_smps_mult(void)
1060 {
1061         u8 value;
1062
1063         twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
1064                         TWL6030_SMPS_MULT);
1065         return value;
1066 }
1067
1068 static int __devinit twlreg_probe(struct platform_device *pdev)
1069 {
1070         int                             i;
1071         struct twlreg_info              *info;
1072         struct regulator_init_data      *initdata;
1073         struct regulation_constraints   *c;
1074         struct regulator_dev            *rdev;
1075         struct twl_regulator_driver_data        *drvdata;
1076
1077         for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) {
1078                 if (twl_regs[i].desc.id != pdev->id)
1079                         continue;
1080                 info = twl_regs + i;
1081                 break;
1082         }
1083         if (!info)
1084                 return -ENODEV;
1085
1086         initdata = pdev->dev.platform_data;
1087         if (!initdata)
1088                 return -EINVAL;
1089
1090         drvdata = initdata->driver_data;
1091
1092         if (!drvdata)
1093                 return -EINVAL;
1094
1095         /* copy the driver data into regulator data */
1096         info->features = drvdata->features;
1097         info->data = drvdata->data;
1098         info->set_voltage = drvdata->set_voltage;
1099         info->get_voltage = drvdata->get_voltage;
1100
1101         /* Constrain board-specific capabilities according to what
1102          * this driver and the chip itself can actually do.
1103          */
1104         c = &initdata->constraints;
1105         c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
1106         c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
1107                                 | REGULATOR_CHANGE_MODE
1108                                 | REGULATOR_CHANGE_STATUS;
1109         switch (pdev->id) {
1110         case TWL4030_REG_VIO:
1111         case TWL4030_REG_VDD1:
1112         case TWL4030_REG_VDD2:
1113         case TWL4030_REG_VPLL1:
1114         case TWL4030_REG_VINTANA1:
1115         case TWL4030_REG_VINTANA2:
1116         case TWL4030_REG_VINTDIG:
1117                 c->always_on = true;
1118                 break;
1119         default:
1120                 break;
1121         }
1122
1123         switch (pdev->id) {
1124         case TWL6025_REG_SMPS3:
1125                 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS3)
1126                         info->flags |= SMPS_EXTENDED_EN;
1127                 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS3)
1128                         info->flags |= SMPS_OFFSET_EN;
1129                 break;
1130         case TWL6025_REG_SMPS4:
1131                 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS4)
1132                         info->flags |= SMPS_EXTENDED_EN;
1133                 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS4)
1134                         info->flags |= SMPS_OFFSET_EN;
1135                 break;
1136         case TWL6025_REG_VIO:
1137                 if (twl_get_smps_mult() & SMPS_MULTOFFSET_VIO)
1138                         info->flags |= SMPS_EXTENDED_EN;
1139                 if (twl_get_smps_offset() & SMPS_MULTOFFSET_VIO)
1140                         info->flags |= SMPS_OFFSET_EN;
1141                 break;
1142         }
1143
1144         rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
1145         if (IS_ERR(rdev)) {
1146                 dev_err(&pdev->dev, "can't register %s, %ld\n",
1147                                 info->desc.name, PTR_ERR(rdev));
1148                 return PTR_ERR(rdev);
1149         }
1150         platform_set_drvdata(pdev, rdev);
1151
1152         if (twl_class_is_4030())
1153                 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
1154                                                 info->remap);
1155
1156         /* NOTE:  many regulators support short-circuit IRQs (presentable
1157          * as REGULATOR_OVER_CURRENT notifications?) configured via:
1158          *  - SC_CONFIG
1159          *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
1160          *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
1161          *  - IT_CONFIG
1162          */
1163
1164         return 0;
1165 }
1166
1167 static int __devexit twlreg_remove(struct platform_device *pdev)
1168 {
1169         regulator_unregister(platform_get_drvdata(pdev));
1170         return 0;
1171 }
1172
1173 MODULE_ALIAS("platform:twl_reg");
1174
1175 static struct platform_driver twlreg_driver = {
1176         .probe          = twlreg_probe,
1177         .remove         = __devexit_p(twlreg_remove),
1178         /* NOTE: short name, to work around driver model truncation of
1179          * "twl_regulator.12" (and friends) to "twl_regulator.1".
1180          */
1181         .driver.name    = "twl_reg",
1182         .driver.owner   = THIS_MODULE,
1183 };
1184
1185 static int __init twlreg_init(void)
1186 {
1187         return platform_driver_register(&twlreg_driver);
1188 }
1189 subsys_initcall(twlreg_init);
1190
1191 static void __exit twlreg_exit(void)
1192 {
1193         platform_driver_unregister(&twlreg_driver);
1194 }
1195 module_exit(twlreg_exit)
1196
1197 MODULE_DESCRIPTION("TWL regulator driver");
1198 MODULE_LICENSE("GPL");