1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2016
4  * Texas Instruments Incorporated, <www.ti.com>
5  *
6  * Keerthy <j-keerthy@ti.com>
7  */
8 
9 #include <common.h>
10 #include <fdtdec.h>
11 #include <errno.h>
12 #include <dm.h>
13 #include <i2c.h>
14 #include <power/pmic.h>
15 #include <power/regulator.h>
16 #include <power/palmas.h>
17 
18 #define	REGULATOR_ON		0x1
19 #define	REGULATOR_OFF		0x0
20 
21 #define	SMPS_MODE_MASK		0x3
22 #define	SMPS_MODE_SHIFT		0x0
23 #define	LDO_MODE_MASK		0x1
24 #define	LDO_MODE_SHIFT		0x0
25 
26 static const char palmas_smps_ctrl[][PALMAS_SMPS_NUM] = {
27 	{0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38, 0x3c},
28 	{0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38},
29 	{0x20, 0x24, 0x2c, 0x30, 0x38},
30 };
31 
32 static const char palmas_smps_volt[][PALMAS_SMPS_NUM] = {
33 	{0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b, 0x3c},
34 	{0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b},
35 	{0x23, 0x27, 0x2f, 0x33, 0x3B}
36 };
37 
38 static const char palmas_ldo_ctrl[][PALMAS_LDO_NUM] = {
39 	{0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64},
40 	{0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64},
41 	{0x50, 0x52, 0x54, 0x5e, 0x62}
42 };
43 
44 static const char palmas_ldo_volt[][PALMAS_LDO_NUM] = {
45 	{0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65},
46 	{0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65},
47 	{0x51, 0x53, 0x55, 0x5f, 0x63}
48 };
49 
50 static int palmas_smps_enable(struct udevice *dev, int op, bool *enable)
51 {
52 	int ret;
53 	unsigned int adr;
54 	struct dm_regulator_uclass_platdata *uc_pdata;
55 
56 	uc_pdata = dev_get_uclass_platdata(dev);
57 	adr = uc_pdata->ctrl_reg;
58 
59 	ret = pmic_reg_read(dev->parent, adr);
60 		if (ret < 0)
61 			return ret;
62 
63 	if (op == PMIC_OP_GET) {
64 		ret &= PALMAS_SMPS_STATUS_MASK;
65 
66 		if (ret)
67 			*enable = true;
68 		else
69 			*enable = false;
70 
71 		return 0;
72 	} else if (op == PMIC_OP_SET) {
73 		if (*enable)
74 			ret |= PALMAS_SMPS_MODE_MASK;
75 		else
76 			ret &= ~(PALMAS_SMPS_MODE_MASK);
77 
78 		ret = pmic_reg_write(dev->parent, adr, ret);
79 		if (ret)
80 			return ret;
81 	}
82 
83 	return 0;
84 }
85 
86 static int palmas_smps_volt2hex(int uV)
87 {
88 	if (uV > PALMAS_LDO_VOLT_MAX)
89 		return -EINVAL;
90 
91 	if (uV > 1650000)
92 		return (uV - 1000000) / 20000 + 0x6;
93 
94 	if (uV == 500000)
95 		return 0x6;
96 	else
97 		return 0x6 + ((uV - 500000) / 10000);
98 }
99 
100 static int palmas_smps_hex2volt(int hex, bool range)
101 {
102 	unsigned int uV = 0;
103 
104 	if (hex > PALMAS_SMPS_VOLT_MAX_HEX)
105 		return -EINVAL;
106 
107 	if (hex < 0x7)
108 		uV = 500000;
109 	else
110 		uV = 500000 + (hex - 0x6) * 10000;
111 
112 	if (range)
113 		uV *= 2;
114 
115 	return uV;
116 }
117 
118 static int palmas_smps_val(struct udevice *dev, int op, int *uV)
119 {
120 	unsigned int hex, adr;
121 	int ret;
122 	bool range;
123 	struct dm_regulator_uclass_platdata *uc_pdata;
124 
125 	uc_pdata = dev_get_uclass_platdata(dev);
126 
127 	if (op == PMIC_OP_GET)
128 		*uV = 0;
129 
130 	adr = uc_pdata->volt_reg;
131 
132 	ret = pmic_reg_read(dev->parent, adr);
133 	if (ret < 0)
134 		return ret;
135 
136 	if (op == PMIC_OP_GET) {
137 		if (ret & PALMAS_SMPS_RANGE_MASK)
138 			range =  true;
139 		else
140 			range = false;
141 
142 		ret &= PALMAS_SMPS_VOLT_MASK;
143 		ret = palmas_smps_hex2volt(ret, range);
144 		if (ret < 0)
145 			return ret;
146 		*uV = ret;
147 
148 		return 0;
149 	}
150 
151 	hex = palmas_smps_volt2hex(*uV);
152 	if (hex < 0)
153 		return hex;
154 
155 	ret &= ~PALMAS_SMPS_VOLT_MASK;
156 	ret |= hex;
157 	if (*uV > 1650000)
158 		ret |= PALMAS_SMPS_RANGE_MASK;
159 
160 	return pmic_reg_write(dev->parent, adr, ret);
161 }
162 
163 static int palmas_ldo_bypass_enable(struct udevice *dev, bool enabled)
164 {
165 	int type = dev_get_driver_data(dev_get_parent(dev));
166 	struct dm_regulator_uclass_platdata *p;
167 	unsigned int adr;
168 	int reg;
169 
170 	if (type == TPS65917) {
171 		/* bypass available only on LDO1 and LDO2 */
172 		if (dev->driver_data > 2)
173 			return -ENOTSUPP;
174 	} else if (type == TPS659038) {
175 		/* bypass available only on LDO9 */
176 		if (dev->driver_data != 9)
177 			return -ENOTSUPP;
178 	}
179 
180 	p = dev_get_uclass_platdata(dev);
181 	adr = p->ctrl_reg;
182 
183 	reg = pmic_reg_read(dev->parent, adr);
184 	if (reg < 0)
185 		return reg;
186 
187 	if (enabled)
188 		reg |= PALMAS_LDO_BYPASS_EN;
189 	else
190 		reg &= ~PALMAS_LDO_BYPASS_EN;
191 
192 	return pmic_reg_write(dev->parent, adr, reg);
193 }
194 
195 static int palmas_ldo_enable(struct udevice *dev, int op, bool *enable)
196 {
197 	int ret;
198 	unsigned int adr;
199 	struct dm_regulator_uclass_platdata *uc_pdata;
200 
201 	uc_pdata = dev_get_uclass_platdata(dev);
202 	adr = uc_pdata->ctrl_reg;
203 
204 	ret = pmic_reg_read(dev->parent, adr);
205 		if (ret < 0)
206 			return ret;
207 
208 	if (op == PMIC_OP_GET) {
209 		ret &= PALMAS_LDO_STATUS_MASK;
210 
211 		if (ret)
212 			*enable = true;
213 		else
214 			*enable = false;
215 
216 		return 0;
217 	} else if (op == PMIC_OP_SET) {
218 		if (*enable)
219 			ret |= PALMAS_LDO_MODE_MASK;
220 		else
221 			ret &= ~(PALMAS_LDO_MODE_MASK);
222 
223 		ret = pmic_reg_write(dev->parent, adr, ret);
224 		if (ret)
225 			return ret;
226 
227 		ret = palmas_ldo_bypass_enable(dev, false);
228 		if (ret && (ret != -ENOTSUPP))
229 			return ret;
230 	}
231 
232 	return 0;
233 }
234 
235 static int palmas_ldo_volt2hex(int uV)
236 {
237 	if (uV > PALMAS_LDO_VOLT_MAX)
238 		return -EINVAL;
239 
240 	return (uV - 850000) / 50000;
241 }
242 
243 static int palmas_ldo_hex2volt(int hex)
244 {
245 	if (hex > PALMAS_LDO_VOLT_MAX_HEX)
246 		return -EINVAL;
247 
248 	if (!hex)
249 		return 0;
250 
251 	return (hex * 50000) + 850000;
252 }
253 
254 static int palmas_ldo_val(struct udevice *dev, int op, int *uV)
255 {
256 	unsigned int hex, adr;
257 	int ret;
258 
259 	struct dm_regulator_uclass_platdata *uc_pdata;
260 
261 	if (op == PMIC_OP_GET)
262 		*uV = 0;
263 
264 	uc_pdata = dev_get_uclass_platdata(dev);
265 
266 	adr = uc_pdata->volt_reg;
267 
268 	ret = pmic_reg_read(dev->parent, adr);
269 	if (ret < 0)
270 		return ret;
271 
272 	if (op == PMIC_OP_GET) {
273 		ret &= PALMAS_LDO_VOLT_MASK;
274 		ret = palmas_ldo_hex2volt(ret);
275 		if (ret < 0)
276 			return ret;
277 		*uV = ret;
278 		return 0;
279 	}
280 
281 	hex = palmas_ldo_volt2hex(*uV);
282 	if (hex < 0)
283 		return hex;
284 
285 	ret &= ~PALMAS_LDO_VOLT_MASK;
286 	ret |= hex;
287 	if (*uV > 1650000)
288 		ret |= 0x80;
289 
290 	return pmic_reg_write(dev->parent, adr, ret);
291 }
292 
293 static int palmas_ldo_probe(struct udevice *dev)
294 {
295 	struct dm_regulator_uclass_platdata *uc_pdata;
296 	struct udevice *parent;
297 
298 	uc_pdata = dev_get_uclass_platdata(dev);
299 
300 	parent = dev_get_parent(dev);
301 	int type = dev_get_driver_data(parent);
302 
303 	uc_pdata->type = REGULATOR_TYPE_LDO;
304 
305 	if (dev->driver_data) {
306 		u8 idx = dev->driver_data - 1;
307 		uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][idx];
308 		uc_pdata->volt_reg = palmas_ldo_volt[type][idx];
309 	} else {
310 		/* check for ldoln and ldousb cases */
311 		if (!strcmp("ldoln", dev->name)) {
312 			uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][9];
313 			uc_pdata->volt_reg = palmas_ldo_volt[type][9];
314 		} else if (!strcmp("ldousb", dev->name)) {
315 			uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][10];
316 			uc_pdata->volt_reg = palmas_ldo_volt[type][10];
317 		}
318 	}
319 
320 	return 0;
321 }
322 
323 static int ldo_get_value(struct udevice *dev)
324 {
325 	int uV;
326 	int ret;
327 
328 	ret = palmas_ldo_val(dev, PMIC_OP_GET, &uV);
329 	if (ret)
330 		return ret;
331 
332 	return uV;
333 }
334 
335 static int ldo_set_value(struct udevice *dev, int uV)
336 {
337 	return palmas_ldo_val(dev, PMIC_OP_SET, &uV);
338 }
339 
340 static int ldo_get_enable(struct udevice *dev)
341 {
342 	bool enable = false;
343 	int ret;
344 
345 	ret = palmas_ldo_enable(dev, PMIC_OP_GET, &enable);
346 	if (ret)
347 		return ret;
348 
349 	return enable;
350 }
351 
352 static int ldo_set_enable(struct udevice *dev, bool enable)
353 {
354 	return palmas_ldo_enable(dev, PMIC_OP_SET, &enable);
355 }
356 
357 static int palmas_smps_probe(struct udevice *dev)
358 {
359 	struct dm_regulator_uclass_platdata *uc_pdata;
360 	struct udevice *parent;
361 	int idx;
362 
363 	uc_pdata = dev_get_uclass_platdata(dev);
364 
365 	parent = dev_get_parent(dev);
366 	int type = dev_get_driver_data(parent);
367 
368 	uc_pdata->type = REGULATOR_TYPE_BUCK;
369 
370 	switch (type) {
371 	case PALMAS:
372 	case TPS659038:
373 		switch (dev->driver_data) {
374 		case 123:
375 		case 12:
376 			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][0];
377 			uc_pdata->volt_reg = palmas_smps_volt[type][0];
378 			break;
379 		case 3:
380 			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][1];
381 			uc_pdata->volt_reg = palmas_smps_volt[type][1];
382 			break;
383 		case 45:
384 			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][2];
385 			uc_pdata->volt_reg = palmas_smps_volt[type][2];
386 			break;
387 		case 6:
388 		case 7:
389 		case 8:
390 		case 9:
391 		case 10:
392 			idx = dev->driver_data - 3;
393 			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
394 			uc_pdata->volt_reg = palmas_smps_volt[type][idx];
395 			break;
396 
397 		default:
398 			printf("Wrong ID for regulator\n");
399 		}
400 		break;
401 
402 	case TPS65917:
403 		switch (dev->driver_data) {
404 		case 1:
405 		case 2:
406 		case 3:
407 		case 4:
408 		case 5:
409 			idx = dev->driver_data - 1;
410 			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
411 			uc_pdata->volt_reg = palmas_smps_volt[type][idx];
412 			break;
413 		case 12:
414 			idx = 0;
415 			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
416 			uc_pdata->volt_reg = palmas_smps_volt[type][idx];
417 			break;
418 		default:
419 			printf("Wrong ID for regulator\n");
420 		}
421 		break;
422 
423 	default:
424 			printf("Invalid PMIC ID\n");
425 	}
426 
427 	return 0;
428 }
429 
430 static int smps_get_value(struct udevice *dev)
431 {
432 	int uV;
433 	int ret;
434 
435 	ret = palmas_smps_val(dev, PMIC_OP_GET, &uV);
436 	if (ret)
437 		return ret;
438 
439 	return uV;
440 }
441 
442 static int smps_set_value(struct udevice *dev, int uV)
443 {
444 	return palmas_smps_val(dev, PMIC_OP_SET, &uV);
445 }
446 
447 static int smps_get_enable(struct udevice *dev)
448 {
449 	bool enable = false;
450 	int ret;
451 
452 	ret = palmas_smps_enable(dev, PMIC_OP_GET, &enable);
453 	if (ret)
454 		return ret;
455 
456 	return enable;
457 }
458 
459 static int smps_set_enable(struct udevice *dev, bool enable)
460 {
461 	return palmas_smps_enable(dev, PMIC_OP_SET, &enable);
462 }
463 
464 static const struct dm_regulator_ops palmas_ldo_ops = {
465 	.get_value  = ldo_get_value,
466 	.set_value  = ldo_set_value,
467 	.get_enable = ldo_get_enable,
468 	.set_enable = ldo_set_enable,
469 };
470 
471 U_BOOT_DRIVER(palmas_ldo) = {
472 	.name = PALMAS_LDO_DRIVER,
473 	.id = UCLASS_REGULATOR,
474 	.ops = &palmas_ldo_ops,
475 	.probe = palmas_ldo_probe,
476 };
477 
478 static const struct dm_regulator_ops palmas_smps_ops = {
479 	.get_value  = smps_get_value,
480 	.set_value  = smps_set_value,
481 	.get_enable = smps_get_enable,
482 	.set_enable = smps_set_enable,
483 };
484 
485 U_BOOT_DRIVER(palmas_smps) = {
486 	.name = PALMAS_SMPS_DRIVER,
487 	.id = UCLASS_REGULATOR,
488 	.ops = &palmas_smps_ops,
489 	.probe = palmas_smps_probe,
490 };
491