summaryrefslogtreecommitdiff
path: root/drivers/power/regulator/sandbox.c
blob: 9893a6b5f3dbdff8d37543e5e8617a33afd0cc8a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
// SPDX-License-Identifier: GPL-2.0+
/*
 *  Copyright (C) 2015 Samsung Electronics
 *  Przemyslaw Marczak  <p.marczak@samsung.com>
 */

#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/sandbox_pmic.h>

#define MODE(_id, _val, _name) [_id] = {  \
	.id = _id,                \
	.register_value = _val,   \
	.name = _name,            \
}

#define RANGE(_min, _max, _step) { \
	.min = _min,               \
	.max = _max,               \
	.step = _step,             \
}

/*
 * struct output_range - helper structure type to define the range of output
 * operating values (current/voltage), limited by the PMIC IC design.
 *
 * @min  - minimum value
 * @max  - maximum value
 * @step - step value
*/
struct output_range {
	int min;
	int max;
	int step;
};

/* BUCK: 1,2 - voltage range */
static struct output_range buck_voltage_range[] = {
	RANGE(OUT_BUCK1_UV_MIN, OUT_BUCK1_UV_MAX, OUT_BUCK1_UV_STEP),
	RANGE(OUT_BUCK2_UV_MIN, OUT_BUCK2_UV_MAX, OUT_BUCK2_UV_STEP),
};

/* BUCK: 1 - current range */
static struct output_range buck_current_range[] = {
	RANGE(OUT_BUCK1_UA_MIN, OUT_BUCK1_UA_MAX, OUT_BUCK1_UA_STEP),
};

/* BUCK operating modes */
static struct dm_regulator_mode sandbox_buck_modes[] = {
	MODE(BUCK_OM_OFF, OM2REG(BUCK_OM_OFF), "OFF"),
	MODE(BUCK_OM_ON, OM2REG(BUCK_OM_ON), "ON"),
	MODE(BUCK_OM_PWM, OM2REG(BUCK_OM_PWM), "PWM"),
};

/* LDO: 1,2 - voltage range */
static struct output_range ldo_voltage_range[] = {
	RANGE(OUT_LDO1_UV_MIN, OUT_LDO1_UV_MAX, OUT_LDO1_UV_STEP),
	RANGE(OUT_LDO2_UV_MIN, OUT_LDO2_UV_MAX, OUT_LDO2_UV_STEP),
};

/* LDO: 1 - current range */
static struct output_range ldo_current_range[] = {
	RANGE(OUT_LDO1_UA_MIN, OUT_LDO1_UA_MAX, OUT_LDO1_UA_STEP),
};

/* LDO operating modes */
static struct dm_regulator_mode sandbox_ldo_modes[] = {
	MODE(LDO_OM_OFF, OM2REG(LDO_OM_OFF), "OFF"),
	MODE(LDO_OM_ON, OM2REG(LDO_OM_ON), "ON"),
	MODE(LDO_OM_SLEEP, OM2REG(LDO_OM_SLEEP), "SLEEP"),
	MODE(LDO_OM_STANDBY, OM2REG(LDO_OM_STANDBY), "STANDBY"),
};

int out_get_value(struct udevice *dev, int output_count, int reg_type,
		  struct output_range *range)
{
	uint8_t reg_val;
	uint reg;
	int ret;

	if (dev->driver_data > output_count) {
		pr_err("Unknown regulator number: %lu for PMIC %s!",
		      dev->driver_data, dev->name);
		return -EINVAL;
	}

	reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
	ret = pmic_read(dev->parent, reg, &reg_val, 1);
	if (ret) {
		pr_err("PMIC read failed: %d\n",  ret);
		return ret;
	}

	ret =  REG2VAL(range[dev->driver_data - 1].min,
		       range[dev->driver_data - 1].step,
		       reg_val);

	return ret;
}

static int out_set_value(struct udevice *dev, int output_count, int reg_type,
			 struct output_range *range, int value)
{
	uint8_t reg_val;
	uint reg;
	int ret;
	int max_value;

	if (dev->driver_data > output_count) {
		pr_err("Unknown regulator number: %lu for PMIC %s!",
		      dev->driver_data, dev->name);
		return -EINVAL;
	}

	max_value = range[dev->driver_data - 1].max;
	if (value > max_value) {
		pr_err("Wrong value for %s: %lu. Max is: %d.",
		      dev->name, dev->driver_data, max_value);
		return -EINVAL;
	}

	reg_val = VAL2REG(range[dev->driver_data - 1].min,
			  range[dev->driver_data - 1].step,
			  value);

	reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
	ret = pmic_write(dev->parent, reg, &reg_val, 1);
	if (ret) {
		pr_err("PMIC write failed: %d\n",  ret);
		return ret;
	}

	return 0;
}

static int out_get_mode(struct udevice *dev)
{
	struct dm_regulator_uclass_platdata *uc_pdata;
	uint8_t reg_val;
	uint reg;
	int ret;
	int i;

	uc_pdata = dev_get_uclass_platdata(dev);

	reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
	ret = pmic_read(dev->parent, reg, &reg_val, 1);
	if (ret) {
		pr_err("PMIC read failed: %d\n",  ret);
		return ret;
	}

	for (i = 0; i < uc_pdata->mode_count; i++) {
		if (reg_val == uc_pdata->mode[i].register_value)
			return uc_pdata->mode[i].id;
	}

	pr_err("Unknown operation mode for %s!", dev->name);
	return -EINVAL;
}

static int out_set_mode(struct udevice *dev, int mode)
{
	struct dm_regulator_uclass_platdata *uc_pdata;
	int reg_val = -1;
	uint reg;
	int ret;
	int i;

	uc_pdata = dev_get_uclass_platdata(dev);

	if (mode >= uc_pdata->mode_count)
		return -EINVAL;

	for (i = 0; i < uc_pdata->mode_count; i++) {
		if (mode == uc_pdata->mode[i].id) {
			reg_val = uc_pdata->mode[i].register_value;
			break;
		}
	}

	if (reg_val == -1) {
		pr_err("Unknown operation mode for %s!", dev->name);
		return -EINVAL;
	}

	reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
	ret = pmic_write(dev->parent, reg, (uint8_t *)&reg_val, 1);
	if (ret) {
		pr_err("PMIC write failed: %d\n",  ret);
		return ret;
	}

	return 0;
}

static int buck_get_voltage(struct udevice *dev)
{
	return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
			      buck_voltage_range);
}

static int buck_set_voltage(struct udevice *dev, int uV)
{
	return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
			      buck_voltage_range, uV);
}

static int buck_get_current(struct udevice *dev)
{
	/* BUCK2 - unsupported */
	if (dev->driver_data == 2)
		return -ENOSYS;

	return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
			      buck_current_range);
}

static int buck_set_current(struct udevice *dev, int uA)
{
	/* BUCK2 - unsupported */
	if (dev->driver_data == 2)
		return -ENOSYS;

	return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
			      buck_current_range, uA);
}

static int buck_get_enable(struct udevice *dev)
{
	if (out_get_mode(dev) == BUCK_OM_OFF)
		return false;

	return true;
}

static int buck_set_enable(struct udevice *dev, bool enable)
{
	return out_set_mode(dev, enable ? BUCK_OM_ON : BUCK_OM_OFF);
}

static int sandbox_buck_probe(struct udevice *dev)
{
	struct dm_regulator_uclass_platdata *uc_pdata;

	uc_pdata = dev_get_uclass_platdata(dev);

	uc_pdata->type = REGULATOR_TYPE_BUCK;
	uc_pdata->mode = sandbox_buck_modes;
	uc_pdata->mode_count = ARRAY_SIZE(sandbox_buck_modes);

	return 0;
}

static const struct dm_regulator_ops sandbox_buck_ops = {
	.get_value   = buck_get_voltage,
	.set_value   = buck_set_voltage,
	.get_current = buck_get_current,
	.set_current = buck_set_current,
	.get_enable  = buck_get_enable,
	.set_enable  = buck_set_enable,
	.get_mode    = out_get_mode,
	.set_mode    = out_set_mode,
};

U_BOOT_DRIVER(sandbox_buck) = {
	.name = SANDBOX_BUCK_DRIVER,
	.id = UCLASS_REGULATOR,
	.ops = &sandbox_buck_ops,
	.probe = sandbox_buck_probe,
};

static int ldo_get_voltage(struct udevice *dev)
{
	return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
			     ldo_voltage_range);
}

static int ldo_set_voltage(struct udevice *dev, int uV)
{
	return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
			     ldo_voltage_range, uV);
}

static int ldo_get_current(struct udevice *dev)
{
	/* LDO2 - unsupported */
	if (dev->driver_data == 2)
		return -ENOSYS;

	return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
			     ldo_current_range);
}

static int ldo_set_current(struct udevice *dev, int uA)
{
	/* LDO2 - unsupported */
	if (dev->driver_data == 2)
		return -ENOSYS;

	return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
			     ldo_current_range, uA);
}

static int ldo_get_enable(struct udevice *dev)
{
	if (out_get_mode(dev) == LDO_OM_OFF)
		return false;

	return true;
}

static int ldo_set_enable(struct udevice *dev, bool enable)
{
	return out_set_mode(dev, enable ? LDO_OM_ON : LDO_OM_OFF);
}

static int sandbox_ldo_probe(struct udevice *dev)
{
	struct dm_regulator_uclass_platdata *uc_pdata;

	uc_pdata = dev_get_uclass_platdata(dev);

	uc_pdata->type = REGULATOR_TYPE_LDO;
	uc_pdata->mode = sandbox_ldo_modes;
	uc_pdata->mode_count = ARRAY_SIZE(sandbox_ldo_modes);

	return 0;
}

static const struct dm_regulator_ops sandbox_ldo_ops = {
	.get_value   = ldo_get_voltage,
	.set_value   = ldo_set_voltage,
	.get_current = ldo_get_current,
	.set_current = ldo_set_current,
	.get_enable  = ldo_get_enable,
	.set_enable  = ldo_set_enable,
	.get_mode    = out_get_mode,
	.set_mode    = out_set_mode,
};

U_BOOT_DRIVER(sandbox_ldo) = {
	.name = SANDBOX_LDO_DRIVER,
	.id = UCLASS_REGULATOR,
	.ops = &sandbox_ldo_ops,
	.probe = sandbox_ldo_probe,
};