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/slab.h>
19#include <linux/init.h>
20#include <linux/err.h>
21#include <linux/module.h>
22#include "mc13xxx.h"
23
24#define MC13783_REG_SWITCHERS0			24
25/* Enable does not exist for SW1A */
26#define MC13783_REG_SWITCHERS0_SW1AEN			0
27#define MC13783_REG_SWITCHERS0_SW1AVSEL			0
28#define MC13783_REG_SWITCHERS0_SW1AVSEL_M		(63 << 0)
29
30#define MC13783_REG_SWITCHERS1			25
31/* Enable does not exist for SW1B */
32#define MC13783_REG_SWITCHERS1_SW1BEN			0
33#define MC13783_REG_SWITCHERS1_SW1BVSEL			0
34#define MC13783_REG_SWITCHERS1_SW1BVSEL_M		(63 << 0)
35
36#define MC13783_REG_SWITCHERS2			26
37/* Enable does not exist for SW2A */
38#define MC13783_REG_SWITCHERS2_SW2AEN			0
39#define MC13783_REG_SWITCHERS2_SW2AVSEL			0
40#define MC13783_REG_SWITCHERS2_SW2AVSEL_M		(63 << 0)
41
42#define MC13783_REG_SWITCHERS3			27
43/* Enable does not exist for SW2B */
44#define MC13783_REG_SWITCHERS3_SW2BEN			0
45#define MC13783_REG_SWITCHERS3_SW2BVSEL			0
46#define MC13783_REG_SWITCHERS3_SW2BVSEL_M		(63 << 0)
47
48#define MC13783_REG_SWITCHERS5			29
49#define MC13783_REG_SWITCHERS5_SW3EN			(1 << 20)
50#define MC13783_REG_SWITCHERS5_SW3VSEL			18
51#define MC13783_REG_SWITCHERS5_SW3VSEL_M		(3 << 18)
52
53#define MC13783_REG_REGULATORSETTING0		30
54#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL		2
55#define MC13783_REG_REGULATORSETTING0_VDIGVSEL		4
56#define MC13783_REG_REGULATORSETTING0_VGENVSEL		6
57#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL	9
58#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL	11
59#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL		13
60#define MC13783_REG_REGULATORSETTING0_VSIMVSEL		14
61#define MC13783_REG_REGULATORSETTING0_VESIMVSEL		15
62#define MC13783_REG_REGULATORSETTING0_VCAMVSEL		16
63
64#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M	(3 << 2)
65#define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M	(3 << 4)
66#define MC13783_REG_REGULATORSETTING0_VGENVSEL_M	(7 << 6)
67#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M	(3 << 9)
68#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M	(3 << 11)
69#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M	(1 << 13)
70#define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M	(1 << 14)
71#define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M	(1 << 15)
72#define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M	(7 << 16)
73
74#define MC13783_REG_REGULATORSETTING1		31
75#define MC13783_REG_REGULATORSETTING1_VVIBVSEL		0
76#define MC13783_REG_REGULATORSETTING1_VRF1VSEL		2
77#define MC13783_REG_REGULATORSETTING1_VRF2VSEL		4
78#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL		6
79#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL		9
80
81#define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M	(3 << 0)
82#define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M	(3 << 2)
83#define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M	(3 << 4)
84#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M	(7 << 6)
85#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M	(7 << 9)
86
87#define MC13783_REG_REGULATORMODE0		32
88#define MC13783_REG_REGULATORMODE0_VAUDIOEN		(1 << 0)
89#define MC13783_REG_REGULATORMODE0_VIOHIEN		(1 << 3)
90#define MC13783_REG_REGULATORMODE0_VIOLOEN		(1 << 6)
91#define MC13783_REG_REGULATORMODE0_VDIGEN		(1 << 9)
92#define MC13783_REG_REGULATORMODE0_VGENEN		(1 << 12)
93#define MC13783_REG_REGULATORMODE0_VRFDIGEN		(1 << 15)
94#define MC13783_REG_REGULATORMODE0_VRFREFEN		(1 << 18)
95#define MC13783_REG_REGULATORMODE0_VRFCPEN		(1 << 21)
96
97#define MC13783_REG_REGULATORMODE1		33
98#define MC13783_REG_REGULATORMODE1_VSIMEN		(1 << 0)
99#define MC13783_REG_REGULATORMODE1_VESIMEN		(1 << 3)
100#define MC13783_REG_REGULATORMODE1_VCAMEN		(1 << 6)
101#define MC13783_REG_REGULATORMODE1_VRFBGEN		(1 << 9)
102#define MC13783_REG_REGULATORMODE1_VVIBEN		(1 << 11)
103#define MC13783_REG_REGULATORMODE1_VRF1EN		(1 << 12)
104#define MC13783_REG_REGULATORMODE1_VRF2EN		(1 << 15)
105#define MC13783_REG_REGULATORMODE1_VMMC1EN		(1 << 18)
106#define MC13783_REG_REGULATORMODE1_VMMC2EN		(1 << 21)
107
108#define MC13783_REG_POWERMISC			34
109#define MC13783_REG_POWERMISC_GPO1EN			(1 << 6)
110#define MC13783_REG_POWERMISC_GPO2EN			(1 << 8)
111#define MC13783_REG_POWERMISC_GPO3EN			(1 << 10)
112#define MC13783_REG_POWERMISC_GPO4EN			(1 << 12)
113#define MC13783_REG_POWERMISC_PWGT1SPIEN		(1 << 15)
114#define MC13783_REG_POWERMISC_PWGT2SPIEN		(1 << 16)
115
116#define MC13783_REG_POWERMISC_PWGTSPI_M			(3 << 15)
117
118
119/* Voltage Values */
120static const int mc13783_sw1x_val[] = {
121	900000, 925000, 950000, 975000,
122	1000000, 1025000, 1050000, 1075000,
123	1100000, 1125000, 1150000, 1175000,
124	1200000, 1225000, 1250000, 1275000,
125	1300000, 1325000, 1350000, 1375000,
126	1400000, 1425000, 1450000, 1475000,
127	1500000, 1525000, 1550000, 1575000,
128	1600000, 1625000, 1650000, 1675000,
129	1700000, 1700000, 1700000, 1700000,
130	1800000, 1800000, 1800000, 1800000,
131	1850000, 1850000, 1850000, 1850000,
132	2000000, 2000000, 2000000, 2000000,
133	2100000, 2100000, 2100000, 2100000,
134	2200000, 2200000, 2200000, 2200000,
135	2200000, 2200000, 2200000, 2200000,
136	2200000, 2200000, 2200000, 2200000,
137};
138
139static const int mc13783_sw2x_val[] = {
140	900000, 925000, 950000, 975000,
141	1000000, 1025000, 1050000, 1075000,
142	1100000, 1125000, 1150000, 1175000,
143	1200000, 1225000, 1250000, 1275000,
144	1300000, 1325000, 1350000, 1375000,
145	1400000, 1425000, 1450000, 1475000,
146	1500000, 1525000, 1550000, 1575000,
147	1600000, 1625000, 1650000, 1675000,
148	1700000, 1700000, 1700000, 1700000,
149	1800000, 1800000, 1800000, 1800000,
150	1900000, 1900000, 1900000, 1900000,
151	2000000, 2000000, 2000000, 2000000,
152	2100000, 2100000, 2100000, 2100000,
153	2200000, 2200000, 2200000, 2200000,
154	2200000, 2200000, 2200000, 2200000,
155	2200000, 2200000, 2200000, 2200000,
156};
157
158static const unsigned int mc13783_sw3_val[] = {
159	5000000, 5000000, 5000000, 5500000,
160};
161
162static const unsigned int mc13783_vaudio_val[] = {
163	2775000,
164};
165
166static const unsigned int mc13783_viohi_val[] = {
167	2775000,
168};
169
170static const unsigned int mc13783_violo_val[] = {
171	1200000, 1300000, 1500000, 1800000,
172};
173
174static const unsigned int mc13783_vdig_val[] = {
175	1200000, 1300000, 1500000, 1800000,
176};
177
178static const unsigned int mc13783_vgen_val[] = {
179	1200000, 1300000, 1500000, 1800000,
180	1100000, 2000000, 2775000, 2400000,
181};
182
183static const unsigned int mc13783_vrfdig_val[] = {
184	1200000, 1500000, 1800000, 1875000,
185};
186
187static const unsigned int mc13783_vrfref_val[] = {
188	2475000, 2600000, 2700000, 2775000,
189};
190
191static const unsigned int mc13783_vrfcp_val[] = {
192	2700000, 2775000,
193};
194
195static const unsigned int mc13783_vsim_val[] = {
196	1800000, 2900000, 3000000,
197};
198
199static const unsigned int mc13783_vesim_val[] = {
200	1800000, 2900000,
201};
202
203static const unsigned int mc13783_vcam_val[] = {
204	1500000, 1800000, 2500000, 2550000,
205	2600000, 2750000, 2800000, 3000000,
206};
207
208static const unsigned int mc13783_vrfbg_val[] = {
209	1250000,
210};
211
212static const unsigned int mc13783_vvib_val[] = {
213	1300000, 1800000, 2000000, 3000000,
214};
215
216static const unsigned int mc13783_vmmc_val[] = {
217	1600000, 1800000, 2000000, 2600000,
218	2700000, 2800000, 2900000, 3000000,
219};
220
221static const unsigned int mc13783_vrf_val[] = {
222	1500000, 1875000, 2700000, 2775000,
223};
224
225static const unsigned int mc13783_gpo_val[] = {
226	3100000,
227};
228
229static const unsigned int mc13783_pwgtdrv_val[] = {
230	5500000,
231};
232
233static struct regulator_ops mc13783_gpo_regulator_ops;
234
235#define MC13783_DEFINE(prefix, name, reg, vsel_reg, voltages)	\
236	MC13xxx_DEFINE(MC13783_REG_, name, reg, vsel_reg, voltages, \
237			mc13xxx_regulator_ops)
238
239#define MC13783_FIXED_DEFINE(prefix, name, reg, voltages)		\
240	MC13xxx_FIXED_DEFINE(MC13783_REG_, name, reg, voltages, \
241			mc13xxx_fixed_regulator_ops)
242
243#define MC13783_GPO_DEFINE(prefix, name, reg, voltages)		\
244	MC13xxx_GPO_DEFINE(MC13783_REG_, name, reg, voltages, \
245			mc13783_gpo_regulator_ops)
246
247#define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages)		\
248	MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
249#define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages)		\
250	MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
251
252static struct mc13xxx_regulator mc13783_regulators[] = {
253	MC13783_DEFINE_SW(SW1A, SWITCHERS0, SWITCHERS0, mc13783_sw1x_val),
254	MC13783_DEFINE_SW(SW1B, SWITCHERS1, SWITCHERS1, mc13783_sw1x_val),
255	MC13783_DEFINE_SW(SW2A, SWITCHERS2, SWITCHERS2, mc13783_sw2x_val),
256	MC13783_DEFINE_SW(SW2B, SWITCHERS3, SWITCHERS3, mc13783_sw2x_val),
257	MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
258
259	MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
260	MC13783_FIXED_DEFINE(REG, VIOHI, REGULATORMODE0, mc13783_viohi_val),
261	MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0,
262			    mc13783_violo_val),
263	MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,
264			    mc13783_vdig_val),
265	MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0,
266			    mc13783_vgen_val),
267	MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0,
268			    mc13783_vrfdig_val),
269	MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0,
270			    mc13783_vrfref_val),
271	MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0,
272			    mc13783_vrfcp_val),
273	MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0,
274			    mc13783_vsim_val),
275	MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0,
276			    mc13783_vesim_val),
277	MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,
278			    mc13783_vcam_val),
279	MC13783_FIXED_DEFINE(REG, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
280	MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1,
281			    mc13783_vvib_val),
282	MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1,
283			    mc13783_vrf_val),
284	MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1,
285			    mc13783_vrf_val),
286	MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1,
287			    mc13783_vmmc_val),
288	MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1,
289			    mc13783_vmmc_val),
290	MC13783_GPO_DEFINE(REG, GPO1, POWERMISC, mc13783_gpo_val),
291	MC13783_GPO_DEFINE(REG, GPO2, POWERMISC, mc13783_gpo_val),
292	MC13783_GPO_DEFINE(REG, GPO3, POWERMISC, mc13783_gpo_val),
293	MC13783_GPO_DEFINE(REG, GPO4, POWERMISC, mc13783_gpo_val),
294	MC13783_GPO_DEFINE(REG, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
295	MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
296};
297
298static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
299		u32 val)
300{
301	struct mc13xxx *mc13783 = priv->mc13xxx;
302	int ret;
303	u32 valread;
304
305	BUG_ON(val & ~mask);
306
307	mc13xxx_lock(priv->mc13xxx);
308	ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
309	if (ret)
310		goto out;
311
312	/* Update the stored state for Power Gates. */
313	priv->powermisc_pwgt_state =
314				(priv->powermisc_pwgt_state & ~mask) | val;
315	priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;
316
317	/* Construct the new register value */
318	valread = (valread & ~mask) | val;
319	/* Overwrite the PWGTxEN with the stored version */
320	valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
321						priv->powermisc_pwgt_state;
322
323	ret = mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
324out:
325	mc13xxx_unlock(priv->mc13xxx);
326	return ret;
327}
328
329static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
330{
331	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
332	struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
333	int id = rdev_get_id(rdev);
334	u32 en_val = mc13xxx_regulators[id].enable_bit;
335
336	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
337
338	/* Power Gate enable value is 0 */
339	if (id == MC13783_REG_PWGT1SPI ||
340	    id == MC13783_REG_PWGT2SPI)
341		en_val = 0;
342
343	return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
344					en_val);
345}
346
347static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
348{
349	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
350	struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
351	int id = rdev_get_id(rdev);
352	u32 dis_val = 0;
353
354	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
355
356	/* Power Gate disable value is 1 */
357	if (id == MC13783_REG_PWGT1SPI ||
358	    id == MC13783_REG_PWGT2SPI)
359		dis_val = mc13xxx_regulators[id].enable_bit;
360
361	return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
362					dis_val);
363}
364
365static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
366{
367	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
368	struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
369	int ret, id = rdev_get_id(rdev);
370	unsigned int val;
371
372	mc13xxx_lock(priv->mc13xxx);
373	ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
374	mc13xxx_unlock(priv->mc13xxx);
375
376	if (ret)
377		return ret;
378
379	/* Power Gates state is stored in powermisc_pwgt_state
380	 * where the meaning of bits is negated */
381	val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
382	      (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);
383
384	return (val & mc13xxx_regulators[id].enable_bit) != 0;
385}
386
387static struct regulator_ops mc13783_gpo_regulator_ops = {
388	.enable = mc13783_gpo_regulator_enable,
389	.disable = mc13783_gpo_regulator_disable,
390	.is_enabled = mc13783_gpo_regulator_is_enabled,
391	.list_voltage = regulator_list_voltage_table,
392	.set_voltage = mc13xxx_fixed_regulator_set_voltage,
393};
394
395static int mc13783_regulator_probe(struct platform_device *pdev)
396{
397	struct mc13xxx_regulator_priv *priv;
398	struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
399	struct mc13xxx_regulator_platform_data *pdata =
400		dev_get_platdata(&pdev->dev);
401	struct mc13xxx_regulator_init_data *mc13xxx_data;
402	struct regulator_config config = { };
403	int i, num_regulators;
404
405	num_regulators = mc13xxx_get_num_regulators_dt(pdev);
406
407	if (num_regulators <= 0 && pdata)
408		num_regulators = pdata->num_regulators;
409	if (num_regulators <= 0)
410		return -EINVAL;
411
412	priv = devm_kzalloc(&pdev->dev, sizeof(*priv) +
413			num_regulators * sizeof(priv->regulators[0]),
414			GFP_KERNEL);
415	if (!priv)
416		return -ENOMEM;
417
418	priv->num_regulators = num_regulators;
419	priv->mc13xxx_regulators = mc13783_regulators;
420	priv->mc13xxx = mc13783;
421	platform_set_drvdata(pdev, priv);
422
423	mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13783_regulators,
424					ARRAY_SIZE(mc13783_regulators));
425
426	for (i = 0; i < priv->num_regulators; i++) {
427		struct regulator_init_data *init_data;
428		struct regulator_desc *desc;
429		struct device_node *node = NULL;
430		int id;
431
432		if (mc13xxx_data) {
433			id = mc13xxx_data[i].id;
434			init_data = mc13xxx_data[i].init_data;
435			node = mc13xxx_data[i].node;
436		} else {
437			id = pdata->regulators[i].id;
438			init_data = pdata->regulators[i].init_data;
439		}
440		desc = &mc13783_regulators[id].desc;
441
442		config.dev = &pdev->dev;
443		config.init_data = init_data;
444		config.driver_data = priv;
445		config.of_node = node;
446
447		priv->regulators[i] = devm_regulator_register(&pdev->dev, desc,
448							      &config);
449		if (IS_ERR(priv->regulators[i])) {
450			dev_err(&pdev->dev, "failed to register regulator %s\n",
451				mc13783_regulators[i].desc.name);
452			return PTR_ERR(priv->regulators[i]);
453		}
454	}
455
456	return 0;
457}
458
459static struct platform_driver mc13783_regulator_driver = {
460	.driver	= {
461		.name	= "mc13783-regulator",
462	},
463	.probe		= mc13783_regulator_probe,
464};
465
466static int __init mc13783_regulator_init(void)
467{
468	return platform_driver_register(&mc13783_regulator_driver);
469}
470subsys_initcall(mc13783_regulator_init);
471
472static void __exit mc13783_regulator_exit(void)
473{
474	platform_driver_unregister(&mc13783_regulator_driver);
475}
476module_exit(mc13783_regulator_exit);
477
478MODULE_LICENSE("GPL v2");
479MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
480MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
481MODULE_ALIAS("platform:mc13783-regulator");
482