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1/*
2 * Regulators driver for Dialog Semiconductor DA903x
3 *
4 * Copyright (C) 2006-2008 Marvell International Ltd.
5 * Copyright (C) 2008 Compulab Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/kernel.h>
13#include <linux/init.h>
14#include <linux/err.h>
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/regulator/driver.h>
18#include <linux/regulator/machine.h>
19#include <linux/mfd/da903x.h>
20
21/* DA9030 Registers */
22#define DA9030_INVAL (-1)
23#define DA9030_LDO1011 (0x10)
24#define DA9030_LDO15 (0x11)
25#define DA9030_LDO1416 (0x12)
26#define DA9030_LDO1819 (0x13)
27#define DA9030_LDO17 (0x14)
28#define DA9030_BUCK2DVM1 (0x15)
29#define DA9030_BUCK2DVM2 (0x16)
30#define DA9030_RCTL11 (0x17)
31#define DA9030_RCTL21 (0x18)
32#define DA9030_LDO1 (0x90)
33#define DA9030_LDO23 (0x91)
34#define DA9030_LDO45 (0x92)
35#define DA9030_LDO6 (0x93)
36#define DA9030_LDO78 (0x94)
37#define DA9030_LDO912 (0x95)
38#define DA9030_BUCK (0x96)
39#define DA9030_RCTL12 (0x97)
40#define DA9030_RCTL22 (0x98)
41#define DA9030_LDO_UNLOCK (0xa0)
42#define DA9030_LDO_UNLOCK_MASK (0xe0)
43#define DA9034_OVER1 (0x10)
44
45/* DA9034 Registers */
46#define DA9034_INVAL (-1)
47#define DA9034_OVER2 (0x11)
48#define DA9034_OVER3 (0x12)
49#define DA9034_LDO643 (0x13)
50#define DA9034_LDO987 (0x14)
51#define DA9034_LDO1110 (0x15)
52#define DA9034_LDO1312 (0x16)
53#define DA9034_LDO1514 (0x17)
54#define DA9034_VCC1 (0x20)
55#define DA9034_ADTV1 (0x23)
56#define DA9034_ADTV2 (0x24)
57#define DA9034_AVRC (0x25)
58#define DA9034_CDTV1 (0x26)
59#define DA9034_CDTV2 (0x27)
60#define DA9034_CVRC (0x28)
61#define DA9034_SDTV1 (0x29)
62#define DA9034_SDTV2 (0x2a)
63#define DA9034_SVRC (0x2b)
64#define DA9034_MDTV1 (0x32)
65#define DA9034_MDTV2 (0x33)
66#define DA9034_MVRC (0x34)
67
68/* DA9035 Registers. DA9034 Registers are comptabile to DA9035. */
69#define DA9035_OVER3 (0x12)
70#define DA9035_VCC2 (0x1f)
71#define DA9035_3DTV1 (0x2c)
72#define DA9035_3DTV2 (0x2d)
73#define DA9035_3VRC (0x2e)
74#define DA9035_AUTOSKIP (0x2f)
75
76struct da903x_regulator_info {
77 struct regulator_desc desc;
78
79 int max_uV;
80 int vol_reg;
81 int vol_shift;
82 int vol_nbits;
83 int update_reg;
84 int update_bit;
85 int enable_reg;
86 int enable_bit;
87};
88
89static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
90{
91 return rdev_get_dev(rdev)->parent->parent;
92}
93
94static inline int check_range(struct da903x_regulator_info *info,
95 int min_uV, int max_uV)
96{
97 if (min_uV < info->desc.min_uV || min_uV > info->max_uV)
98 return -EINVAL;
99
100 return 0;
101}
102
103/* DA9030/DA9034 common operations */
104static int da903x_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
105{
106 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
107 struct device *da9034_dev = to_da903x_dev(rdev);
108 uint8_t val, mask;
109
110 val = selector << info->vol_shift;
111 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
112
113 return da903x_update(da9034_dev, info->vol_reg, val, mask);
114}
115
116static int da903x_get_voltage_sel(struct regulator_dev *rdev)
117{
118 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
119 struct device *da9034_dev = to_da903x_dev(rdev);
120 uint8_t val, mask;
121 int ret;
122
123 ret = da903x_read(da9034_dev, info->vol_reg, &val);
124 if (ret)
125 return ret;
126
127 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
128 val = (val & mask) >> info->vol_shift;
129
130 return val;
131}
132
133static int da903x_enable(struct regulator_dev *rdev)
134{
135 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
136 struct device *da9034_dev = to_da903x_dev(rdev);
137
138 return da903x_set_bits(da9034_dev, info->enable_reg,
139 1 << info->enable_bit);
140}
141
142static int da903x_disable(struct regulator_dev *rdev)
143{
144 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
145 struct device *da9034_dev = to_da903x_dev(rdev);
146
147 return da903x_clr_bits(da9034_dev, info->enable_reg,
148 1 << info->enable_bit);
149}
150
151static int da903x_is_enabled(struct regulator_dev *rdev)
152{
153 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
154 struct device *da9034_dev = to_da903x_dev(rdev);
155 uint8_t reg_val;
156 int ret;
157
158 ret = da903x_read(da9034_dev, info->enable_reg, ®_val);
159 if (ret)
160 return ret;
161
162 return !!(reg_val & (1 << info->enable_bit));
163}
164
165/* DA9030 specific operations */
166static int da9030_set_ldo1_15_voltage_sel(struct regulator_dev *rdev,
167 unsigned selector)
168{
169 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
170 struct device *da903x_dev = to_da903x_dev(rdev);
171 uint8_t val, mask;
172 int ret;
173
174 val = selector << info->vol_shift;
175 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
176 val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
177 mask |= DA9030_LDO_UNLOCK_MASK;
178
179 /* write twice */
180 ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
181 if (ret)
182 return ret;
183
184 return da903x_update(da903x_dev, info->vol_reg, val, mask);
185}
186
187static int da9030_map_ldo14_voltage(struct regulator_dev *rdev,
188 int min_uV, int max_uV)
189{
190 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
191 int thresh, sel;
192
193 if (check_range(info, min_uV, max_uV)) {
194 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
195 return -EINVAL;
196 }
197
198 thresh = (info->max_uV + info->desc.min_uV) / 2;
199 if (min_uV < thresh) {
200 sel = DIV_ROUND_UP(thresh - min_uV, info->desc.uV_step);
201 sel |= 0x4;
202 } else {
203 sel = DIV_ROUND_UP(min_uV - thresh, info->desc.uV_step);
204 }
205
206 return sel;
207}
208
209static int da9030_list_ldo14_voltage(struct regulator_dev *rdev,
210 unsigned selector)
211{
212 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
213 int volt;
214
215 if (selector & 0x4)
216 volt = rdev->desc->min_uV +
217 rdev->desc->uV_step * (3 - (selector & ~0x4));
218 else
219 volt = (info->max_uV + rdev->desc->min_uV) / 2 +
220 rdev->desc->uV_step * (selector & ~0x4);
221
222 if (volt > info->max_uV)
223 return -EINVAL;
224
225 return volt;
226}
227
228/* DA9034 specific operations */
229static int da9034_set_dvc_voltage_sel(struct regulator_dev *rdev,
230 unsigned selector)
231{
232 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
233 struct device *da9034_dev = to_da903x_dev(rdev);
234 uint8_t val, mask;
235 int ret;
236
237 val = selector << info->vol_shift;
238 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
239
240 ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
241 if (ret)
242 return ret;
243
244 ret = da903x_set_bits(da9034_dev, info->update_reg,
245 1 << info->update_bit);
246 return ret;
247}
248
249static int da9034_map_ldo12_voltage(struct regulator_dev *rdev,
250 int min_uV, int max_uV)
251{
252 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
253 int sel;
254
255 if (check_range(info, min_uV, max_uV)) {
256 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
257 return -EINVAL;
258 }
259
260 sel = DIV_ROUND_UP(min_uV - info->desc.min_uV, info->desc.uV_step);
261 sel = (sel >= 20) ? sel - 12 : ((sel > 7) ? 8 : sel);
262
263 return sel;
264}
265
266static int da9034_list_ldo12_voltage(struct regulator_dev *rdev,
267 unsigned selector)
268{
269 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
270 int volt;
271
272 if (selector >= 8)
273 volt = 2700000 + rdev->desc->uV_step * (selector - 8);
274 else
275 volt = rdev->desc->min_uV + rdev->desc->uV_step * selector;
276
277 if (volt > info->max_uV)
278 return -EINVAL;
279
280 return volt;
281}
282
283static struct regulator_ops da903x_regulator_ldo_ops = {
284 .set_voltage_sel = da903x_set_voltage_sel,
285 .get_voltage_sel = da903x_get_voltage_sel,
286 .list_voltage = regulator_list_voltage_linear,
287 .map_voltage = regulator_map_voltage_linear,
288 .enable = da903x_enable,
289 .disable = da903x_disable,
290 .is_enabled = da903x_is_enabled,
291};
292
293/* NOTE: this is dedicated for the insane DA9030 LDO14 */
294static struct regulator_ops da9030_regulator_ldo14_ops = {
295 .set_voltage_sel = da903x_set_voltage_sel,
296 .get_voltage_sel = da903x_get_voltage_sel,
297 .list_voltage = da9030_list_ldo14_voltage,
298 .map_voltage = da9030_map_ldo14_voltage,
299 .enable = da903x_enable,
300 .disable = da903x_disable,
301 .is_enabled = da903x_is_enabled,
302};
303
304/* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks */
305static struct regulator_ops da9030_regulator_ldo1_15_ops = {
306 .set_voltage_sel = da9030_set_ldo1_15_voltage_sel,
307 .get_voltage_sel = da903x_get_voltage_sel,
308 .list_voltage = regulator_list_voltage_linear,
309 .map_voltage = regulator_map_voltage_linear,
310 .enable = da903x_enable,
311 .disable = da903x_disable,
312 .is_enabled = da903x_is_enabled,
313};
314
315static struct regulator_ops da9034_regulator_dvc_ops = {
316 .set_voltage_sel = da9034_set_dvc_voltage_sel,
317 .get_voltage_sel = da903x_get_voltage_sel,
318 .list_voltage = regulator_list_voltage_linear,
319 .map_voltage = regulator_map_voltage_linear,
320 .enable = da903x_enable,
321 .disable = da903x_disable,
322 .is_enabled = da903x_is_enabled,
323};
324
325/* NOTE: this is dedicated for the insane LDO12 */
326static struct regulator_ops da9034_regulator_ldo12_ops = {
327 .set_voltage_sel = da903x_set_voltage_sel,
328 .get_voltage_sel = da903x_get_voltage_sel,
329 .list_voltage = da9034_list_ldo12_voltage,
330 .map_voltage = da9034_map_ldo12_voltage,
331 .enable = da903x_enable,
332 .disable = da903x_disable,
333 .is_enabled = da903x_is_enabled,
334};
335
336#define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit) \
337{ \
338 .desc = { \
339 .name = "LDO" #_id, \
340 .ops = &da903x_regulator_ldo_ops, \
341 .type = REGULATOR_VOLTAGE, \
342 .id = _pmic##_ID_LDO##_id, \
343 .n_voltages = (step) ? ((max - min) / step + 1) : 1, \
344 .owner = THIS_MODULE, \
345 .min_uV = (min) * 1000, \
346 .uV_step = (step) * 1000, \
347 }, \
348 .max_uV = (max) * 1000, \
349 .vol_reg = _pmic##_##vreg, \
350 .vol_shift = (shift), \
351 .vol_nbits = (nbits), \
352 .enable_reg = _pmic##_##ereg, \
353 .enable_bit = (ebit), \
354}
355
356#define DA903x_DVC(_pmic, _id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
357{ \
358 .desc = { \
359 .name = #_id, \
360 .ops = &da9034_regulator_dvc_ops, \
361 .type = REGULATOR_VOLTAGE, \
362 .id = _pmic##_ID_##_id, \
363 .n_voltages = (step) ? ((max - min) / step + 1) : 1, \
364 .owner = THIS_MODULE, \
365 .min_uV = (min) * 1000, \
366 .uV_step = (step) * 1000, \
367 }, \
368 .max_uV = (max) * 1000, \
369 .vol_reg = _pmic##_##vreg, \
370 .vol_shift = (0), \
371 .vol_nbits = (nbits), \
372 .update_reg = _pmic##_##ureg, \
373 .update_bit = (ubit), \
374 .enable_reg = _pmic##_##ereg, \
375 .enable_bit = (ebit), \
376}
377
378#define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
379 DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
380
381#define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
382 DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
383
384#define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
385 DA903x_DVC(DA9030, _id, min, max, step, vreg, nbits, ureg, ubit, \
386 ereg, ebit)
387
388#define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
389 DA903x_DVC(DA9034, _id, min, max, step, vreg, nbits, ureg, ubit, \
390 ereg, ebit)
391
392#define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
393 DA903x_DVC(DA9035, _id, min, max, step, vreg, nbits, ureg, ubit, \
394 ereg, ebit)
395
396static struct da903x_regulator_info da903x_regulator_info[] = {
397 /* DA9030 */
398 DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),
399
400 DA9030_LDO( 1, 1200, 3200, 100, LDO1, 0, 5, RCTL12, 1),
401 DA9030_LDO( 2, 1800, 3200, 100, LDO23, 0, 4, RCTL12, 2),
402 DA9030_LDO( 3, 1800, 3200, 100, LDO23, 4, 4, RCTL12, 3),
403 DA9030_LDO( 4, 1800, 3200, 100, LDO45, 0, 4, RCTL12, 4),
404 DA9030_LDO( 5, 1800, 3200, 100, LDO45, 4, 4, RCTL12, 5),
405 DA9030_LDO( 6, 1800, 3200, 100, LDO6, 0, 4, RCTL12, 6),
406 DA9030_LDO( 7, 1800, 3200, 100, LDO78, 0, 4, RCTL12, 7),
407 DA9030_LDO( 8, 1800, 3200, 100, LDO78, 4, 4, RCTL22, 0),
408 DA9030_LDO( 9, 1800, 3200, 100, LDO912, 0, 4, RCTL22, 1),
409 DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
410 DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
411 DA9030_LDO(12, 1800, 3200, 100, LDO912, 4, 4, RCTL22, 4),
412 DA9030_LDO(14, 2760, 2940, 30, LDO1416, 0, 3, RCTL11, 4),
413 DA9030_LDO(15, 1100, 2650, 50, LDO15, 0, 5, RCTL11, 5),
414 DA9030_LDO(16, 1100, 2650, 50, LDO1416, 3, 5, RCTL11, 6),
415 DA9030_LDO(17, 1800, 3200, 100, LDO17, 0, 4, RCTL11, 7),
416 DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
417 DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
418 DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
419
420 /* DA9034 */
421 DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0),
422 DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1),
423 DA9034_DVC(LDO2, 725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2),
424 DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
425
426 DA9034_LDO( 3, 1800, 3300, 100, LDO643, 0, 4, OVER3, 5),
427 DA9034_LDO( 4, 1800, 2900,1100, LDO643, 4, 1, OVER3, 6),
428 DA9034_LDO( 6, 2500, 2850, 50, LDO643, 5, 3, OVER2, 0),
429 DA9034_LDO( 7, 2700, 3050, 50, LDO987, 0, 3, OVER2, 1),
430 DA9034_LDO( 8, 2700, 2850, 50, LDO987, 3, 2, OVER2, 2),
431 DA9034_LDO( 9, 2700, 3050, 50, LDO987, 5, 3, OVER2, 3),
432 DA9034_LDO(10, 2700, 3050, 50, LDO1110, 0, 3, OVER2, 4),
433 DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
434 DA9034_LDO(12, 1700, 3050, 50, LDO1312, 0, 4, OVER3, 6),
435 DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
436 DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
437 DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
438 DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
439
440 /* DA9035 */
441 DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
442};
443
444static inline struct da903x_regulator_info *find_regulator_info(int id)
445{
446 struct da903x_regulator_info *ri;
447 int i;
448
449 for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
450 ri = &da903x_regulator_info[i];
451 if (ri->desc.id == id)
452 return ri;
453 }
454 return NULL;
455}
456
457static int __devinit da903x_regulator_probe(struct platform_device *pdev)
458{
459 struct da903x_regulator_info *ri = NULL;
460 struct regulator_dev *rdev;
461 struct regulator_config config = { };
462
463 ri = find_regulator_info(pdev->id);
464 if (ri == NULL) {
465 dev_err(&pdev->dev, "invalid regulator ID specified\n");
466 return -EINVAL;
467 }
468
469 /* Workaround for the weird LDO12 voltage setting */
470 if (ri->desc.id == DA9034_ID_LDO12) {
471 ri->desc.ops = &da9034_regulator_ldo12_ops;
472 ri->desc.n_voltages = 16;
473 }
474
475 if (ri->desc.id == DA9030_ID_LDO14)
476 ri->desc.ops = &da9030_regulator_ldo14_ops;
477
478 if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
479 ri->desc.ops = &da9030_regulator_ldo1_15_ops;
480
481 config.dev = &pdev->dev;
482 config.init_data = pdev->dev.platform_data;
483 config.driver_data = ri;
484
485 rdev = regulator_register(&ri->desc, &config);
486 if (IS_ERR(rdev)) {
487 dev_err(&pdev->dev, "failed to register regulator %s\n",
488 ri->desc.name);
489 return PTR_ERR(rdev);
490 }
491
492 platform_set_drvdata(pdev, rdev);
493 return 0;
494}
495
496static int __devexit da903x_regulator_remove(struct platform_device *pdev)
497{
498 struct regulator_dev *rdev = platform_get_drvdata(pdev);
499
500 regulator_unregister(rdev);
501 return 0;
502}
503
504static struct platform_driver da903x_regulator_driver = {
505 .driver = {
506 .name = "da903x-regulator",
507 .owner = THIS_MODULE,
508 },
509 .probe = da903x_regulator_probe,
510 .remove = __devexit_p(da903x_regulator_remove),
511};
512
513static int __init da903x_regulator_init(void)
514{
515 return platform_driver_register(&da903x_regulator_driver);
516}
517subsys_initcall(da903x_regulator_init);
518
519static void __exit da903x_regulator_exit(void)
520{
521 platform_driver_unregister(&da903x_regulator_driver);
522}
523module_exit(da903x_regulator_exit);
524
525MODULE_LICENSE("GPL");
526MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
527 "Mike Rapoport <mike@compulab.co.il>");
528MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
529MODULE_ALIAS("platform:da903x-regulator");