Merge remote-tracking branches 'regulator/topic/dt' and 'regulator/for-linus' into...
[linux-2.6.git] / 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, NULL);
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");