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