Root/drivers/regulator/da903x.c

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    if (rdev->desc->n_voltages == 1)
111        return -EINVAL;
112
113    val = selector << info->vol_shift;
114    mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
115
116    return da903x_update(da9034_dev, info->vol_reg, val, mask);
117}
118
119static int da903x_get_voltage_sel(struct regulator_dev *rdev)
120{
121    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
122    struct device *da9034_dev = to_da903x_dev(rdev);
123    uint8_t val, mask;
124    int ret;
125
126    if (rdev->desc->n_voltages == 1)
127        return 0;
128
129    ret = da903x_read(da9034_dev, info->vol_reg, &val);
130    if (ret)
131        return ret;
132
133    mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
134    val = (val & mask) >> info->vol_shift;
135
136    return val;
137}
138
139static int da903x_enable(struct regulator_dev *rdev)
140{
141    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
142    struct device *da9034_dev = to_da903x_dev(rdev);
143
144    return da903x_set_bits(da9034_dev, info->enable_reg,
145                    1 << info->enable_bit);
146}
147
148static int da903x_disable(struct regulator_dev *rdev)
149{
150    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
151    struct device *da9034_dev = to_da903x_dev(rdev);
152
153    return da903x_clr_bits(da9034_dev, info->enable_reg,
154                    1 << info->enable_bit);
155}
156
157static int da903x_is_enabled(struct regulator_dev *rdev)
158{
159    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
160    struct device *da9034_dev = to_da903x_dev(rdev);
161    uint8_t reg_val;
162    int ret;
163
164    ret = da903x_read(da9034_dev, info->enable_reg, &reg_val);
165    if (ret)
166        return ret;
167
168    return !!(reg_val & (1 << info->enable_bit));
169}
170
171/* DA9030 specific operations */
172static int da9030_set_ldo1_15_voltage_sel(struct regulator_dev *rdev,
173                      unsigned selector)
174{
175    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
176    struct device *da903x_dev = to_da903x_dev(rdev);
177    uint8_t val, mask;
178    int ret;
179
180    val = selector << info->vol_shift;
181    mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
182    val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
183    mask |= DA9030_LDO_UNLOCK_MASK;
184
185    /* write twice */
186    ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
187    if (ret)
188        return ret;
189
190    return da903x_update(da903x_dev, info->vol_reg, val, mask);
191}
192
193static int da9030_map_ldo14_voltage(struct regulator_dev *rdev,
194                    int min_uV, int max_uV)
195{
196    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
197    int thresh, sel;
198
199    if (check_range(info, min_uV, max_uV)) {
200        pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
201        return -EINVAL;
202    }
203
204    thresh = (info->max_uV + info->desc.min_uV) / 2;
205    if (min_uV < thresh) {
206        sel = DIV_ROUND_UP(thresh - min_uV, info->desc.uV_step);
207        sel |= 0x4;
208    } else {
209        sel = DIV_ROUND_UP(min_uV - thresh, info->desc.uV_step);
210    }
211
212    return sel;
213}
214
215static int da9030_list_ldo14_voltage(struct regulator_dev *rdev,
216                     unsigned selector)
217{
218    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
219    int volt;
220
221    if (selector & 0x4)
222        volt = rdev->desc->min_uV +
223               rdev->desc->uV_step * (3 - (selector & ~0x4));
224    else
225        volt = (info->max_uV + rdev->desc->min_uV) / 2 +
226               rdev->desc->uV_step * (selector & ~0x4);
227
228    if (volt > info->max_uV)
229        return -EINVAL;
230
231    return volt;
232}
233
234/* DA9034 specific operations */
235static int da9034_set_dvc_voltage_sel(struct regulator_dev *rdev,
236                      unsigned selector)
237{
238    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
239    struct device *da9034_dev = to_da903x_dev(rdev);
240    uint8_t val, mask;
241    int ret;
242
243    val = selector << info->vol_shift;
244    mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
245
246    ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
247    if (ret)
248        return ret;
249
250    ret = da903x_set_bits(da9034_dev, info->update_reg,
251                    1 << info->update_bit);
252    return ret;
253}
254
255static int da9034_map_ldo12_voltage(struct regulator_dev *rdev,
256                    int min_uV, int max_uV)
257{
258    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
259    int sel;
260
261    if (check_range(info, min_uV, max_uV)) {
262        pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
263        return -EINVAL;
264    }
265
266    sel = DIV_ROUND_UP(min_uV - info->desc.min_uV, info->desc.uV_step);
267    sel = (sel >= 20) ? sel - 12 : ((sel > 7) ? 8 : sel);
268
269    return sel;
270}
271
272static int da9034_list_ldo12_voltage(struct regulator_dev *rdev,
273                     unsigned selector)
274{
275    struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
276    int volt;
277
278    if (selector >= 8)
279        volt = 2700000 + rdev->desc->uV_step * (selector - 8);
280    else
281        volt = rdev->desc->min_uV + rdev->desc->uV_step * selector;
282
283    if (volt > info->max_uV)
284        return -EINVAL;
285
286    return volt;
287}
288
289static struct regulator_ops da903x_regulator_ldo_ops = {
290    .set_voltage_sel = da903x_set_voltage_sel,
291    .get_voltage_sel = da903x_get_voltage_sel,
292    .list_voltage = regulator_list_voltage_linear,
293    .map_voltage = regulator_map_voltage_linear,
294    .enable = da903x_enable,
295    .disable = da903x_disable,
296    .is_enabled = da903x_is_enabled,
297};
298
299/* NOTE: this is dedicated for the insane DA9030 LDO14 */
300static struct regulator_ops da9030_regulator_ldo14_ops = {
301    .set_voltage_sel = da903x_set_voltage_sel,
302    .get_voltage_sel = da903x_get_voltage_sel,
303    .list_voltage = da9030_list_ldo14_voltage,
304    .map_voltage = da9030_map_ldo14_voltage,
305    .enable = da903x_enable,
306    .disable = da903x_disable,
307    .is_enabled = da903x_is_enabled,
308};
309
310/* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks */
311static struct regulator_ops da9030_regulator_ldo1_15_ops = {
312    .set_voltage_sel = da9030_set_ldo1_15_voltage_sel,
313    .get_voltage_sel = da903x_get_voltage_sel,
314    .list_voltage = regulator_list_voltage_linear,
315    .map_voltage = regulator_map_voltage_linear,
316    .enable = da903x_enable,
317    .disable = da903x_disable,
318    .is_enabled = da903x_is_enabled,
319};
320
321static struct regulator_ops da9034_regulator_dvc_ops = {
322    .set_voltage_sel = da9034_set_dvc_voltage_sel,
323    .get_voltage_sel = da903x_get_voltage_sel,
324    .list_voltage = regulator_list_voltage_linear,
325    .map_voltage = regulator_map_voltage_linear,
326    .enable = da903x_enable,
327    .disable = da903x_disable,
328    .is_enabled = da903x_is_enabled,
329};
330
331/* NOTE: this is dedicated for the insane LDO12 */
332static struct regulator_ops da9034_regulator_ldo12_ops = {
333    .set_voltage_sel = da903x_set_voltage_sel,
334    .get_voltage_sel = da903x_get_voltage_sel,
335    .list_voltage = da9034_list_ldo12_voltage,
336    .map_voltage = da9034_map_ldo12_voltage,
337    .enable = da903x_enable,
338    .disable = da903x_disable,
339    .is_enabled = da903x_is_enabled,
340};
341
342#define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit) \
343{ \
344    .desc = { \
345        .name = "LDO" #_id, \
346        .ops = &da903x_regulator_ldo_ops, \
347        .type = REGULATOR_VOLTAGE, \
348        .id = _pmic##_ID_LDO##_id, \
349        .n_voltages = (step) ? ((max - min) / step + 1) : 1, \
350        .owner = THIS_MODULE, \
351        .min_uV = (min) * 1000, \
352        .uV_step = (step) * 1000, \
353    }, \
354    .max_uV = (max) * 1000, \
355    .vol_reg = _pmic##_##vreg, \
356    .vol_shift = (shift), \
357    .vol_nbits = (nbits), \
358    .enable_reg = _pmic##_##ereg, \
359    .enable_bit = (ebit), \
360}
361
362#define DA903x_DVC(_pmic, _id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
363{ \
364    .desc = { \
365        .name = #_id, \
366        .ops = &da9034_regulator_dvc_ops, \
367        .type = REGULATOR_VOLTAGE, \
368        .id = _pmic##_ID_##_id, \
369        .n_voltages = (step) ? ((max - min) / step + 1) : 1, \
370        .owner = THIS_MODULE, \
371        .min_uV = (min) * 1000, \
372        .uV_step = (step) * 1000, \
373    }, \
374    .max_uV = (max) * 1000, \
375    .vol_reg = _pmic##_##vreg, \
376    .vol_shift = (0), \
377    .vol_nbits = (nbits), \
378    .update_reg = _pmic##_##ureg, \
379    .update_bit = (ubit), \
380    .enable_reg = _pmic##_##ereg, \
381    .enable_bit = (ebit), \
382}
383
384#define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
385    DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
386
387#define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
388    DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
389
390#define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
391    DA903x_DVC(DA9030, _id, min, max, step, vreg, nbits, ureg, ubit, \
392           ereg, ebit)
393
394#define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
395    DA903x_DVC(DA9034, _id, min, max, step, vreg, nbits, ureg, ubit, \
396           ereg, ebit)
397
398#define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
399    DA903x_DVC(DA9035, _id, min, max, step, vreg, nbits, ureg, ubit, \
400           ereg, ebit)
401
402static struct da903x_regulator_info da903x_regulator_info[] = {
403    /* DA9030 */
404    DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),
405
406    DA9030_LDO( 1, 1200, 3200, 100, LDO1, 0, 5, RCTL12, 1),
407    DA9030_LDO( 2, 1800, 3200, 100, LDO23, 0, 4, RCTL12, 2),
408    DA9030_LDO( 3, 1800, 3200, 100, LDO23, 4, 4, RCTL12, 3),
409    DA9030_LDO( 4, 1800, 3200, 100, LDO45, 0, 4, RCTL12, 4),
410    DA9030_LDO( 5, 1800, 3200, 100, LDO45, 4, 4, RCTL12, 5),
411    DA9030_LDO( 6, 1800, 3200, 100, LDO6, 0, 4, RCTL12, 6),
412    DA9030_LDO( 7, 1800, 3200, 100, LDO78, 0, 4, RCTL12, 7),
413    DA9030_LDO( 8, 1800, 3200, 100, LDO78, 4, 4, RCTL22, 0),
414    DA9030_LDO( 9, 1800, 3200, 100, LDO912, 0, 4, RCTL22, 1),
415    DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
416    DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
417    DA9030_LDO(12, 1800, 3200, 100, LDO912, 4, 4, RCTL22, 4),
418    DA9030_LDO(14, 2760, 2940, 30, LDO1416, 0, 3, RCTL11, 4),
419    DA9030_LDO(15, 1100, 2650, 50, LDO15, 0, 5, RCTL11, 5),
420    DA9030_LDO(16, 1100, 2650, 50, LDO1416, 3, 5, RCTL11, 6),
421    DA9030_LDO(17, 1800, 3200, 100, LDO17, 0, 4, RCTL11, 7),
422    DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
423    DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
424    DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
425
426    /* DA9034 */
427    DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0),
428    DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1),
429    DA9034_DVC(LDO2, 725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2),
430    DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
431
432    DA9034_LDO( 3, 1800, 3300, 100, LDO643, 0, 4, OVER3, 5),
433    DA9034_LDO( 4, 1800, 2900,1100, LDO643, 4, 1, OVER3, 6),
434    DA9034_LDO( 6, 2500, 2850, 50, LDO643, 5, 3, OVER2, 0),
435    DA9034_LDO( 7, 2700, 3050, 50, LDO987, 0, 3, OVER2, 1),
436    DA9034_LDO( 8, 2700, 2850, 50, LDO987, 3, 2, OVER2, 2),
437    DA9034_LDO( 9, 2700, 3050, 50, LDO987, 5, 3, OVER2, 3),
438    DA9034_LDO(10, 2700, 3050, 50, LDO1110, 0, 3, OVER2, 4),
439    DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
440    DA9034_LDO(12, 1700, 3050, 50, LDO1312, 0, 4, OVER3, 6),
441    DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
442    DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
443    DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
444    DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
445
446    /* DA9035 */
447    DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
448};
449
450static inline struct da903x_regulator_info *find_regulator_info(int id)
451{
452    struct da903x_regulator_info *ri;
453    int i;
454
455    for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
456        ri = &da903x_regulator_info[i];
457        if (ri->desc.id == id)
458            return ri;
459    }
460    return NULL;
461}
462
463static int __devinit da903x_regulator_probe(struct platform_device *pdev)
464{
465    struct da903x_regulator_info *ri = NULL;
466    struct regulator_dev *rdev;
467    struct regulator_config config = { };
468
469    ri = find_regulator_info(pdev->id);
470    if (ri == NULL) {
471        dev_err(&pdev->dev, "invalid regulator ID specified\n");
472        return -EINVAL;
473    }
474
475    /* Workaround for the weird LDO12 voltage setting */
476    if (ri->desc.id == DA9034_ID_LDO12) {
477        ri->desc.ops = &da9034_regulator_ldo12_ops;
478        ri->desc.n_voltages = 16;
479    }
480
481    if (ri->desc.id == DA9030_ID_LDO14)
482        ri->desc.ops = &da9030_regulator_ldo14_ops;
483
484    if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
485        ri->desc.ops = &da9030_regulator_ldo1_15_ops;
486
487    config.dev = &pdev->dev;
488    config.init_data = pdev->dev.platform_data;
489    config.driver_data = ri;
490
491    rdev = regulator_register(&ri->desc, &config);
492    if (IS_ERR(rdev)) {
493        dev_err(&pdev->dev, "failed to register regulator %s\n",
494                ri->desc.name);
495        return PTR_ERR(rdev);
496    }
497
498    platform_set_drvdata(pdev, rdev);
499    return 0;
500}
501
502static int __devexit da903x_regulator_remove(struct platform_device *pdev)
503{
504    struct regulator_dev *rdev = platform_get_drvdata(pdev);
505
506    regulator_unregister(rdev);
507    return 0;
508}
509
510static struct platform_driver da903x_regulator_driver = {
511    .driver = {
512        .name = "da903x-regulator",
513        .owner = THIS_MODULE,
514    },
515    .probe = da903x_regulator_probe,
516    .remove = __devexit_p(da903x_regulator_remove),
517};
518
519static int __init da903x_regulator_init(void)
520{
521    return platform_driver_register(&da903x_regulator_driver);
522}
523subsys_initcall(da903x_regulator_init);
524
525static void __exit da903x_regulator_exit(void)
526{
527    platform_driver_unregister(&da903x_regulator_driver);
528}
529module_exit(da903x_regulator_exit);
530
531MODULE_LICENSE("GPL");
532MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
533          "Mike Rapoport <mike@compulab.co.il>");
534MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
535MODULE_ALIAS("platform:da903x-regulator");
536

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