1 /*
2 * Regulator Driver for Freescale MC13783 PMIC
3 *
4 * Copyright 2010 Yong Shen <yong.shen@linaro.org>
5 * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
6 * Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #include <linux/mfd/mc13783.h>
14 #include <linux/regulator/machine.h>
15 #include <linux/regulator/driver.h>
16 #include <linux/platform_device.h>
17 #include <linux/kernel.h>
18 #include <linux/mfd/core.h>
19 #include <linux/slab.h>
20 #include <linux/init.h>
21 #include <linux/err.h>
22 #include "mc13xxx.h"
23
24 #define MC13783_REG_SWITCHERS5 29
25 #define MC13783_REG_SWITCHERS5_SW3EN (1 << 20)
26 #define MC13783_REG_SWITCHERS5_SW3VSEL 18
27 #define MC13783_REG_SWITCHERS5_SW3VSEL_M (3 << 18)
28
29 #define MC13783_REG_REGULATORSETTING0 30
30 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL 2
31 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL 4
32 #define MC13783_REG_REGULATORSETTING0_VGENVSEL 6
33 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL 9
34 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL 11
35 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL 13
36 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL 14
37 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL 15
38 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL 16
39
40 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M (3 << 2)
41 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M (3 << 4)
42 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M (7 << 6)
43 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M (3 << 9)
44 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M (3 << 11)
45 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M (1 << 13)
46 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M (1 << 14)
47 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M (1 << 15)
48 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M (7 << 16)
49
50 #define MC13783_REG_REGULATORSETTING1 31
51 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL 0
52 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL 2
53 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL 4
54 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL 6
55 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL 9
56
57 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M (3 << 0)
58 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M (3 << 2)
59 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M (3 << 4)
60 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M (7 << 6)
61 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M (7 << 9)
62
63 #define MC13783_REG_REGULATORMODE0 32
64 #define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0)
65 #define MC13783_REG_REGULATORMODE0_VIOHIEN (1 << 3)
66 #define MC13783_REG_REGULATORMODE0_VIOLOEN (1 << 6)
67 #define MC13783_REG_REGULATORMODE0_VDIGEN (1 << 9)
68 #define MC13783_REG_REGULATORMODE0_VGENEN (1 << 12)
69 #define MC13783_REG_REGULATORMODE0_VRFDIGEN (1 << 15)
70 #define MC13783_REG_REGULATORMODE0_VRFREFEN (1 << 18)
71 #define MC13783_REG_REGULATORMODE0_VRFCPEN (1 << 21)
72
73 #define MC13783_REG_REGULATORMODE1 33
74 #define MC13783_REG_REGULATORMODE1_VSIMEN (1 << 0)
75 #define MC13783_REG_REGULATORMODE1_VESIMEN (1 << 3)
76 #define MC13783_REG_REGULATORMODE1_VCAMEN (1 << 6)
77 #define MC13783_REG_REGULATORMODE1_VRFBGEN (1 << 9)
78 #define MC13783_REG_REGULATORMODE1_VVIBEN (1 << 11)
79 #define MC13783_REG_REGULATORMODE1_VRF1EN (1 << 12)
80 #define MC13783_REG_REGULATORMODE1_VRF2EN (1 << 15)
81 #define MC13783_REG_REGULATORMODE1_VMMC1EN (1 << 18)
82 #define MC13783_REG_REGULATORMODE1_VMMC2EN (1 << 21)
83
84 #define MC13783_REG_POWERMISC 34
85 #define MC13783_REG_POWERMISC_GPO1EN (1 << 6)
86 #define MC13783_REG_POWERMISC_GPO2EN (1 << 8)
87 #define MC13783_REG_POWERMISC_GPO3EN (1 << 10)
88 #define MC13783_REG_POWERMISC_GPO4EN (1 << 12)
89 #define MC13783_REG_POWERMISC_PWGT1SPIEN (1 << 15)
90 #define MC13783_REG_POWERMISC_PWGT2SPIEN (1 << 16)
91
92 #define MC13783_REG_POWERMISC_PWGTSPI_M (3 << 15)
93
94
95 /* Voltage Values */
96 static const int mc13783_sw3_val[] = {
97 5000000, 5000000, 5000000, 5500000,
98 };
99
100 static const int mc13783_vaudio_val[] = {
101 2775000,
102 };
103
104 static const int mc13783_viohi_val[] = {
105 2775000,
106 };
107
108 static const int mc13783_violo_val[] = {
109 1200000, 1300000, 1500000, 1800000,
110 };
111
112 static const int mc13783_vdig_val[] = {
113 1200000, 1300000, 1500000, 1800000,
114 };
115
116 static const int mc13783_vgen_val[] = {
117 1200000, 1300000, 1500000, 1800000,
118 1100000, 2000000, 2775000, 2400000,
119 };
120
121 static const int mc13783_vrfdig_val[] = {
122 1200000, 1500000, 1800000, 1875000,
123 };
124
125 static const int mc13783_vrfref_val[] = {
126 2475000, 2600000, 2700000, 2775000,
127 };
128
129 static const int mc13783_vrfcp_val[] = {
130 2700000, 2775000,
131 };
132
133 static const int mc13783_vsim_val[] = {
134 1800000, 2900000, 3000000,
135 };
136
137 static const int mc13783_vesim_val[] = {
138 1800000, 2900000,
139 };
140
141 static const int mc13783_vcam_val[] = {
142 1500000, 1800000, 2500000, 2550000,
143 2600000, 2750000, 2800000, 3000000,
144 };
145
146 static const int mc13783_vrfbg_val[] = {
147 1250000,
148 };
149
150 static const int mc13783_vvib_val[] = {
151 1300000, 1800000, 2000000, 3000000,
152 };
153
154 static const int mc13783_vmmc_val[] = {
155 1600000, 1800000, 2000000, 2600000,
156 2700000, 2800000, 2900000, 3000000,
157 };
158
159 static const int mc13783_vrf_val[] = {
160 1500000, 1875000, 2700000, 2775000,
161 };
162
163 static const int mc13783_gpo_val[] = {
164 3100000,
165 };
166
167 static const int mc13783_pwgtdrv_val[] = {
168 5500000,
169 };
170
171 static struct regulator_ops mc13783_gpo_regulator_ops;
172
173 #define MC13783_DEFINE(prefix, name, reg, vsel_reg, voltages) \
174 MC13xxx_DEFINE(MC13783_REG_, name, reg, vsel_reg, voltages, \
175 mc13xxx_regulator_ops)
176
177 #define MC13783_FIXED_DEFINE(prefix, name, reg, voltages) \
178 MC13xxx_FIXED_DEFINE(MC13783_REG_, name, reg, voltages, \
179 mc13xxx_fixed_regulator_ops)
180
181 #define MC13783_GPO_DEFINE(prefix, name, reg, voltages) \
182 MC13xxx_GPO_DEFINE(MC13783_REG_, name, reg, voltages, \
183 mc13783_gpo_regulator_ops)
184
185 #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages) \
186 MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
187 #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages) \
188 MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
189
190 static struct mc13xxx_regulator mc13783_regulators[] = {
191 MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
192
193 MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
194 MC13783_FIXED_DEFINE(REG, VIOHI, REGULATORMODE0, mc13783_viohi_val),
195 MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0, \
196 mc13783_violo_val),
197 MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0, \
198 mc13783_vdig_val),
199 MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0, \
200 mc13783_vgen_val),
201 MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0, \
202 mc13783_vrfdig_val),
203 MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0, \
204 mc13783_vrfref_val),
205 MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0, \
206 mc13783_vrfcp_val),
207 MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0, \
208 mc13783_vsim_val),
209 MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0, \
210 mc13783_vesim_val),
211 MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0, \
212 mc13783_vcam_val),
213 MC13783_FIXED_DEFINE(REG, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
214 MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1, \
215 mc13783_vvib_val),
216 MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1, \
217 mc13783_vrf_val),
218 MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1, \
219 mc13783_vrf_val),
220 MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1, \
221 mc13783_vmmc_val),
222 MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1, \
223 mc13783_vmmc_val),
224 MC13783_GPO_DEFINE(REG, GPO1, POWERMISC, mc13783_gpo_val),
225 MC13783_GPO_DEFINE(REG, GPO2, POWERMISC, mc13783_gpo_val),
226 MC13783_GPO_DEFINE(REG, GPO3, POWERMISC, mc13783_gpo_val),
227 MC13783_GPO_DEFINE(REG, GPO4, POWERMISC, mc13783_gpo_val),
228 MC13783_GPO_DEFINE(REG, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
229 MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
230 };
231
mc13783_powermisc_rmw(struct mc13xxx_regulator_priv * priv,u32 mask,u32 val)232 static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
233 u32 val)
234 {
235 struct mc13xxx *mc13783 = priv->mc13xxx;
236 int ret;
237 u32 valread;
238
239 BUG_ON(val & ~mask);
240
241 ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
242 if (ret)
243 return ret;
244
245 /* Update the stored state for Power Gates. */
246 priv->powermisc_pwgt_state =
247 (priv->powermisc_pwgt_state & ~mask) | val;
248 priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;
249
250 /* Construct the new register value */
251 valread = (valread & ~mask) | val;
252 /* Overwrite the PWGTxEN with the stored version */
253 valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
254 priv->powermisc_pwgt_state;
255
256 return mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
257 }
258
mc13783_gpo_regulator_enable(struct regulator_dev * rdev)259 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
260 {
261 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
262 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
263 int id = rdev_get_id(rdev);
264 int ret;
265 u32 en_val = mc13xxx_regulators[id].enable_bit;
266
267 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
268
269 /* Power Gate enable value is 0 */
270 if (id == MC13783_REG_PWGT1SPI ||
271 id == MC13783_REG_PWGT2SPI)
272 en_val = 0;
273
274 mc13xxx_lock(priv->mc13xxx);
275 ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
276 en_val);
277 mc13xxx_unlock(priv->mc13xxx);
278
279 return ret;
280 }
281
mc13783_gpo_regulator_disable(struct regulator_dev * rdev)282 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
283 {
284 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
285 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
286 int id = rdev_get_id(rdev);
287 int ret;
288 u32 dis_val = 0;
289
290 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
291
292 /* Power Gate disable value is 1 */
293 if (id == MC13783_REG_PWGT1SPI ||
294 id == MC13783_REG_PWGT2SPI)
295 dis_val = mc13xxx_regulators[id].enable_bit;
296
297 mc13xxx_lock(priv->mc13xxx);
298 ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
299 dis_val);
300 mc13xxx_unlock(priv->mc13xxx);
301
302 return ret;
303 }
304
mc13783_gpo_regulator_is_enabled(struct regulator_dev * rdev)305 static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
306 {
307 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
308 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
309 int ret, id = rdev_get_id(rdev);
310 unsigned int val;
311
312 mc13xxx_lock(priv->mc13xxx);
313 ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
314 mc13xxx_unlock(priv->mc13xxx);
315
316 if (ret)
317 return ret;
318
319 /* Power Gates state is stored in powermisc_pwgt_state
320 * where the meaning of bits is negated */
321 val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
322 (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);
323
324 return (val & mc13xxx_regulators[id].enable_bit) != 0;
325 }
326
327 static struct regulator_ops mc13783_gpo_regulator_ops = {
328 .enable = mc13783_gpo_regulator_enable,
329 .disable = mc13783_gpo_regulator_disable,
330 .is_enabled = mc13783_gpo_regulator_is_enabled,
331 .list_voltage = mc13xxx_regulator_list_voltage,
332 .set_voltage = mc13xxx_fixed_regulator_set_voltage,
333 .get_voltage = mc13xxx_fixed_regulator_get_voltage,
334 };
335
mc13783_regulator_probe(struct platform_device * pdev)336 static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
337 {
338 struct mc13xxx_regulator_priv *priv;
339 struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
340 struct mc13783_regulator_platform_data *pdata = mfd_get_data(pdev);
341 struct mc13783_regulator_init_data *init_data;
342 int i, ret;
343
344 dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
345
346 priv = kzalloc(sizeof(*priv) +
347 pdata->num_regulators * sizeof(priv->regulators[0]),
348 GFP_KERNEL);
349 if (!priv)
350 return -ENOMEM;
351
352 priv->mc13xxx_regulators = mc13783_regulators;
353 priv->mc13xxx = mc13783;
354
355 for (i = 0; i < pdata->num_regulators; i++) {
356 init_data = &pdata->regulators[i];
357 priv->regulators[i] = regulator_register(
358 &mc13783_regulators[init_data->id].desc,
359 &pdev->dev, init_data->init_data, priv);
360
361 if (IS_ERR(priv->regulators[i])) {
362 dev_err(&pdev->dev, "failed to register regulator %s\n",
363 mc13783_regulators[i].desc.name);
364 ret = PTR_ERR(priv->regulators[i]);
365 goto err;
366 }
367 }
368
369 platform_set_drvdata(pdev, priv);
370
371 return 0;
372 err:
373 while (--i >= 0)
374 regulator_unregister(priv->regulators[i]);
375
376 kfree(priv);
377
378 return ret;
379 }
380
mc13783_regulator_remove(struct platform_device * pdev)381 static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
382 {
383 struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
384 struct mc13783_regulator_platform_data *pdata = mfd_get_data(pdev);
385 int i;
386
387 platform_set_drvdata(pdev, NULL);
388
389 for (i = 0; i < pdata->num_regulators; i++)
390 regulator_unregister(priv->regulators[i]);
391
392 kfree(priv);
393 return 0;
394 }
395
396 static struct platform_driver mc13783_regulator_driver = {
397 .driver = {
398 .name = "mc13783-regulator",
399 .owner = THIS_MODULE,
400 },
401 .remove = __devexit_p(mc13783_regulator_remove),
402 .probe = mc13783_regulator_probe,
403 };
404
mc13783_regulator_init(void)405 static int __init mc13783_regulator_init(void)
406 {
407 return platform_driver_register(&mc13783_regulator_driver);
408 }
409 subsys_initcall(mc13783_regulator_init);
410
mc13783_regulator_exit(void)411 static void __exit mc13783_regulator_exit(void)
412 {
413 platform_driver_unregister(&mc13783_regulator_driver);
414 }
415 module_exit(mc13783_regulator_exit);
416
417 MODULE_LICENSE("GPL v2");
418 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
419 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
420 MODULE_ALIAS("platform:mc13783-regulator");
421