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da903x.c
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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 
76 struct 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 
89 static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
90 {
91  return rdev_get_dev(rdev)->parent->parent;
92 }
93 
94 static 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 */
104 static 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 
119 static 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 
139 static 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 
148 static 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 
157 static 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 */
172 static 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 
193 static 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 
215 static 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 */
235 static 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 
255 static 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 
272 static 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 
289 static 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 */
300 static 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 */
311 static 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 
321 static 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 */
332 static 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 
402 static 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 
450 static 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 
463 static 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 
502 static 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 
510 static 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 
519 static int __init da903x_regulator_init(void)
520 {
521  return platform_driver_register(&da903x_regulator_driver);
522 }
523 subsys_initcall(da903x_regulator_init);
524 
525 static void __exit da903x_regulator_exit(void)
526 {
527  platform_driver_unregister(&da903x_regulator_driver);
528 }
529 module_exit(da903x_regulator_exit);
530 
531 MODULE_LICENSE("GPL");
532 MODULE_AUTHOR("Eric Miao <[email protected]>"
533  "Mike Rapoport <[email protected]>");
534 MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
535 MODULE_ALIAS("platform:da903x-regulator");
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