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