xref: /openbmc/u-boot/drivers/pinctrl/renesas/pfc.c (revision 6f443330)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Pin Control driver for SuperH Pin Function Controller.
4  *
5  * Authors: Magnus Damm, Paul Mundt, Laurent Pinchart
6  *
7  * Copyright (C) 2008 Magnus Damm
8  * Copyright (C) 2009 - 2012 Paul Mundt
9  * Copyright (C) 2017 Marek Vasut
10  */
11 
12 #define DRV_NAME "sh-pfc"
13 
14 #include <common.h>
15 #include <dm.h>
16 #include <errno.h>
17 #include <dm/pinctrl.h>
18 #include <linux/io.h>
19 #include <linux/sizes.h>
20 
21 #include "sh_pfc.h"
22 
23 enum sh_pfc_model {
24 	SH_PFC_R8A7790 = 0,
25 	SH_PFC_R8A7791,
26 	SH_PFC_R8A7792,
27 	SH_PFC_R8A7793,
28 	SH_PFC_R8A7794,
29 	SH_PFC_R8A7795,
30 	SH_PFC_R8A7796,
31 	SH_PFC_R8A77970,
32 	SH_PFC_R8A77990,
33 	SH_PFC_R8A77995,
34 };
35 
36 struct sh_pfc_pin_config {
37 	u32 type;
38 };
39 
40 struct sh_pfc_pinctrl {
41 	struct sh_pfc *pfc;
42 
43 	struct sh_pfc_pin_config *configs;
44 
45 	const char *func_prop_name;
46 	const char *groups_prop_name;
47 	const char *pins_prop_name;
48 };
49 
50 struct sh_pfc_pin_range {
51 	u16 start;
52 	u16 end;
53 };
54 
55 struct sh_pfc_pinctrl_priv {
56 	struct sh_pfc			pfc;
57 	struct sh_pfc_pinctrl		pmx;
58 };
59 
sh_pfc_get_pin_index(struct sh_pfc * pfc,unsigned int pin)60 int sh_pfc_get_pin_index(struct sh_pfc *pfc, unsigned int pin)
61 {
62 	unsigned int offset;
63 	unsigned int i;
64 
65 	for (i = 0, offset = 0; i < pfc->nr_ranges; ++i) {
66 		const struct sh_pfc_pin_range *range = &pfc->ranges[i];
67 
68 		if (pin <= range->end)
69 			return pin >= range->start
70 			     ? offset + pin - range->start : -1;
71 
72 		offset += range->end - range->start + 1;
73 	}
74 
75 	return -EINVAL;
76 }
77 
sh_pfc_enum_in_range(u16 enum_id,const struct pinmux_range * r)78 static int sh_pfc_enum_in_range(u16 enum_id, const struct pinmux_range *r)
79 {
80 	if (enum_id < r->begin)
81 		return 0;
82 
83 	if (enum_id > r->end)
84 		return 0;
85 
86 	return 1;
87 }
88 
sh_pfc_read_raw_reg(void __iomem * mapped_reg,unsigned int reg_width)89 u32 sh_pfc_read_raw_reg(void __iomem *mapped_reg, unsigned int reg_width)
90 {
91 	switch (reg_width) {
92 	case 8:
93 		return readb(mapped_reg);
94 	case 16:
95 		return readw(mapped_reg);
96 	case 32:
97 		return readl(mapped_reg);
98 	}
99 
100 	BUG();
101 	return 0;
102 }
103 
sh_pfc_write_raw_reg(void __iomem * mapped_reg,unsigned int reg_width,u32 data)104 void sh_pfc_write_raw_reg(void __iomem *mapped_reg, unsigned int reg_width,
105 			  u32 data)
106 {
107 	switch (reg_width) {
108 	case 8:
109 		writeb(data, mapped_reg);
110 		return;
111 	case 16:
112 		writew(data, mapped_reg);
113 		return;
114 	case 32:
115 		writel(data, mapped_reg);
116 		return;
117 	}
118 
119 	BUG();
120 }
121 
sh_pfc_read(struct sh_pfc * pfc,u32 reg)122 u32 sh_pfc_read(struct sh_pfc *pfc, u32 reg)
123 {
124 	return sh_pfc_read_raw_reg((void __iomem *)(uintptr_t)reg, 32);
125 }
126 
sh_pfc_write(struct sh_pfc * pfc,u32 reg,u32 data)127 void sh_pfc_write(struct sh_pfc *pfc, u32 reg, u32 data)
128 {
129 	void __iomem *unlock_reg =
130 		(void __iomem *)(uintptr_t)pfc->info->unlock_reg;
131 
132 	if (pfc->info->unlock_reg)
133 		sh_pfc_write_raw_reg(unlock_reg, 32, ~data);
134 
135 	sh_pfc_write_raw_reg((void __iomem *)(uintptr_t)reg, 32, data);
136 }
137 
sh_pfc_config_reg_helper(struct sh_pfc * pfc,const struct pinmux_cfg_reg * crp,unsigned int in_pos,void __iomem ** mapped_regp,u32 * maskp,unsigned int * posp)138 static void sh_pfc_config_reg_helper(struct sh_pfc *pfc,
139 				     const struct pinmux_cfg_reg *crp,
140 				     unsigned int in_pos,
141 				     void __iomem **mapped_regp, u32 *maskp,
142 				     unsigned int *posp)
143 {
144 	unsigned int k;
145 
146 	*mapped_regp = (void __iomem *)(uintptr_t)crp->reg;
147 
148 	if (crp->field_width) {
149 		*maskp = (1 << crp->field_width) - 1;
150 		*posp = crp->reg_width - ((in_pos + 1) * crp->field_width);
151 	} else {
152 		*maskp = (1 << crp->var_field_width[in_pos]) - 1;
153 		*posp = crp->reg_width;
154 		for (k = 0; k <= in_pos; k++)
155 			*posp -= crp->var_field_width[k];
156 	}
157 }
158 
sh_pfc_write_config_reg(struct sh_pfc * pfc,const struct pinmux_cfg_reg * crp,unsigned int field,u32 value)159 static void sh_pfc_write_config_reg(struct sh_pfc *pfc,
160 				    const struct pinmux_cfg_reg *crp,
161 				    unsigned int field, u32 value)
162 {
163 	void __iomem *mapped_reg;
164 	void __iomem *unlock_reg =
165 		(void __iomem *)(uintptr_t)pfc->info->unlock_reg;
166 	unsigned int pos;
167 	u32 mask, data;
168 
169 	sh_pfc_config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos);
170 
171 	dev_dbg(pfc->dev, "write_reg addr = %x, value = 0x%x, field = %u, "
172 		"r_width = %u, f_width = %u\n",
173 		crp->reg, value, field, crp->reg_width, crp->field_width);
174 
175 	mask = ~(mask << pos);
176 	value = value << pos;
177 
178 	data = sh_pfc_read_raw_reg(mapped_reg, crp->reg_width);
179 	data &= mask;
180 	data |= value;
181 
182 	if (pfc->info->unlock_reg)
183 		sh_pfc_write_raw_reg(unlock_reg, 32, ~data);
184 
185 	sh_pfc_write_raw_reg(mapped_reg, crp->reg_width, data);
186 }
187 
sh_pfc_get_config_reg(struct sh_pfc * pfc,u16 enum_id,const struct pinmux_cfg_reg ** crp,unsigned int * fieldp,u32 * valuep)188 static int sh_pfc_get_config_reg(struct sh_pfc *pfc, u16 enum_id,
189 				 const struct pinmux_cfg_reg **crp,
190 				 unsigned int *fieldp, u32 *valuep)
191 {
192 	unsigned int k = 0;
193 
194 	while (1) {
195 		const struct pinmux_cfg_reg *config_reg =
196 			pfc->info->cfg_regs + k;
197 		unsigned int r_width = config_reg->reg_width;
198 		unsigned int f_width = config_reg->field_width;
199 		unsigned int curr_width;
200 		unsigned int bit_pos;
201 		unsigned int pos = 0;
202 		unsigned int m = 0;
203 
204 		if (!r_width)
205 			break;
206 
207 		for (bit_pos = 0; bit_pos < r_width; bit_pos += curr_width) {
208 			u32 ncomb;
209 			u32 n;
210 
211 			if (f_width)
212 				curr_width = f_width;
213 			else
214 				curr_width = config_reg->var_field_width[m];
215 
216 			ncomb = 1 << curr_width;
217 			for (n = 0; n < ncomb; n++) {
218 				if (config_reg->enum_ids[pos + n] == enum_id) {
219 					*crp = config_reg;
220 					*fieldp = m;
221 					*valuep = n;
222 					return 0;
223 				}
224 			}
225 			pos += ncomb;
226 			m++;
227 		}
228 		k++;
229 	}
230 
231 	return -EINVAL;
232 }
233 
sh_pfc_mark_to_enum(struct sh_pfc * pfc,u16 mark,int pos,u16 * enum_idp)234 static int sh_pfc_mark_to_enum(struct sh_pfc *pfc, u16 mark, int pos,
235 			      u16 *enum_idp)
236 {
237 	const u16 *data = pfc->info->pinmux_data;
238 	unsigned int k;
239 
240 	if (pos) {
241 		*enum_idp = data[pos + 1];
242 		return pos + 1;
243 	}
244 
245 	for (k = 0; k < pfc->info->pinmux_data_size; k++) {
246 		if (data[k] == mark) {
247 			*enum_idp = data[k + 1];
248 			return k + 1;
249 		}
250 	}
251 
252 	dev_err(pfc->dev, "cannot locate data/mark enum_id for mark %d\n",
253 		mark);
254 	return -EINVAL;
255 }
256 
sh_pfc_config_mux(struct sh_pfc * pfc,unsigned mark,int pinmux_type)257 int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
258 {
259 	const struct pinmux_range *range;
260 	int pos = 0;
261 
262 	switch (pinmux_type) {
263 	case PINMUX_TYPE_GPIO:
264 	case PINMUX_TYPE_FUNCTION:
265 		range = NULL;
266 		break;
267 
268 	case PINMUX_TYPE_OUTPUT:
269 		range = &pfc->info->output;
270 		break;
271 
272 	case PINMUX_TYPE_INPUT:
273 		range = &pfc->info->input;
274 		break;
275 
276 	default:
277 		return -EINVAL;
278 	}
279 
280 	/* Iterate over all the configuration fields we need to update. */
281 	while (1) {
282 		const struct pinmux_cfg_reg *cr;
283 		unsigned int field;
284 		u16 enum_id;
285 		u32 value;
286 		int in_range;
287 		int ret;
288 
289 		pos = sh_pfc_mark_to_enum(pfc, mark, pos, &enum_id);
290 		if (pos < 0)
291 			return pos;
292 
293 		if (!enum_id)
294 			break;
295 
296 		/* Check if the configuration field selects a function. If it
297 		 * doesn't, skip the field if it's not applicable to the
298 		 * requested pinmux type.
299 		 */
300 		in_range = sh_pfc_enum_in_range(enum_id, &pfc->info->function);
301 		if (!in_range) {
302 			if (pinmux_type == PINMUX_TYPE_FUNCTION) {
303 				/* Functions are allowed to modify all
304 				 * fields.
305 				 */
306 				in_range = 1;
307 			} else if (pinmux_type != PINMUX_TYPE_GPIO) {
308 				/* Input/output types can only modify fields
309 				 * that correspond to their respective ranges.
310 				 */
311 				in_range = sh_pfc_enum_in_range(enum_id, range);
312 
313 				/*
314 				 * special case pass through for fixed
315 				 * input-only or output-only pins without
316 				 * function enum register association.
317 				 */
318 				if (in_range && enum_id == range->force)
319 					continue;
320 			}
321 			/* GPIOs are only allowed to modify function fields. */
322 		}
323 
324 		if (!in_range)
325 			continue;
326 
327 		ret = sh_pfc_get_config_reg(pfc, enum_id, &cr, &field, &value);
328 		if (ret < 0)
329 			return ret;
330 
331 		sh_pfc_write_config_reg(pfc, cr, field, value);
332 	}
333 
334 	return 0;
335 }
336 
337 const struct pinmux_bias_reg *
sh_pfc_pin_to_bias_reg(const struct sh_pfc * pfc,unsigned int pin,unsigned int * bit)338 sh_pfc_pin_to_bias_reg(const struct sh_pfc *pfc, unsigned int pin,
339 		       unsigned int *bit)
340 {
341 	unsigned int i, j;
342 
343 	for (i = 0; pfc->info->bias_regs[i].puen; i++) {
344 		for (j = 0; j < ARRAY_SIZE(pfc->info->bias_regs[i].pins); j++) {
345 			if (pfc->info->bias_regs[i].pins[j] == pin) {
346 				*bit = j;
347 				return &pfc->info->bias_regs[i];
348 			}
349 		}
350 	}
351 
352 	WARN_ONCE(1, "Pin %u is not in bias info list\n", pin);
353 
354 	return NULL;
355 }
356 
sh_pfc_init_ranges(struct sh_pfc * pfc)357 static int sh_pfc_init_ranges(struct sh_pfc *pfc)
358 {
359 	struct sh_pfc_pin_range *range;
360 	unsigned int nr_ranges;
361 	unsigned int i;
362 
363 	if (pfc->info->pins[0].pin == (u16)-1) {
364 		/* Pin number -1 denotes that the SoC doesn't report pin numbers
365 		 * in its pin arrays yet. Consider the pin numbers range as
366 		 * continuous and allocate a single range.
367 		 */
368 		pfc->nr_ranges = 1;
369 		pfc->ranges = kzalloc(sizeof(*pfc->ranges), GFP_KERNEL);
370 		if (pfc->ranges == NULL)
371 			return -ENOMEM;
372 
373 		pfc->ranges->start = 0;
374 		pfc->ranges->end = pfc->info->nr_pins - 1;
375 		pfc->nr_gpio_pins = pfc->info->nr_pins;
376 
377 		return 0;
378 	}
379 
380 	/* Count, allocate and fill the ranges. The PFC SoC data pins array must
381 	 * be sorted by pin numbers, and pins without a GPIO port must come
382 	 * last.
383 	 */
384 	for (i = 1, nr_ranges = 1; i < pfc->info->nr_pins; ++i) {
385 		if (pfc->info->pins[i-1].pin != pfc->info->pins[i].pin - 1)
386 			nr_ranges++;
387 	}
388 
389 	pfc->nr_ranges = nr_ranges;
390 	pfc->ranges = kzalloc(sizeof(*pfc->ranges) * nr_ranges, GFP_KERNEL);
391 	if (pfc->ranges == NULL)
392 		return -ENOMEM;
393 
394 	range = pfc->ranges;
395 	range->start = pfc->info->pins[0].pin;
396 
397 	for (i = 1; i < pfc->info->nr_pins; ++i) {
398 		if (pfc->info->pins[i-1].pin == pfc->info->pins[i].pin - 1)
399 			continue;
400 
401 		range->end = pfc->info->pins[i-1].pin;
402 		if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO))
403 			pfc->nr_gpio_pins = range->end + 1;
404 
405 		range++;
406 		range->start = pfc->info->pins[i].pin;
407 	}
408 
409 	range->end = pfc->info->pins[i-1].pin;
410 	if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO))
411 		pfc->nr_gpio_pins = range->end + 1;
412 
413 	return 0;
414 }
415 
sh_pfc_pinctrl_get_pins_count(struct udevice * dev)416 static int sh_pfc_pinctrl_get_pins_count(struct udevice *dev)
417 {
418 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
419 
420 	return priv->pfc.info->nr_pins;
421 }
422 
sh_pfc_pinctrl_get_pin_name(struct udevice * dev,unsigned selector)423 static const char *sh_pfc_pinctrl_get_pin_name(struct udevice *dev,
424 						  unsigned selector)
425 {
426 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
427 
428 	return priv->pfc.info->pins[selector].name;
429 }
430 
sh_pfc_pinctrl_get_groups_count(struct udevice * dev)431 static int sh_pfc_pinctrl_get_groups_count(struct udevice *dev)
432 {
433 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
434 
435 	return priv->pfc.info->nr_groups;
436 }
437 
sh_pfc_pinctrl_get_group_name(struct udevice * dev,unsigned selector)438 static const char *sh_pfc_pinctrl_get_group_name(struct udevice *dev,
439 						  unsigned selector)
440 {
441 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
442 
443 	return priv->pfc.info->groups[selector].name;
444 }
445 
sh_pfc_pinctrl_get_functions_count(struct udevice * dev)446 static int sh_pfc_pinctrl_get_functions_count(struct udevice *dev)
447 {
448 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
449 
450 	return priv->pfc.info->nr_functions;
451 }
452 
sh_pfc_pinctrl_get_function_name(struct udevice * dev,unsigned selector)453 static const char *sh_pfc_pinctrl_get_function_name(struct udevice *dev,
454 						  unsigned selector)
455 {
456 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
457 
458 	return priv->pfc.info->functions[selector].name;
459 }
460 
sh_pfc_config_mux_for_gpio(struct udevice * dev,unsigned pin_selector)461 int sh_pfc_config_mux_for_gpio(struct udevice *dev, unsigned pin_selector)
462 {
463 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
464 	struct sh_pfc_pinctrl *pmx = &priv->pmx;
465 	struct sh_pfc *pfc = &priv->pfc;
466 	struct sh_pfc_pin_config *cfg;
467 	const struct sh_pfc_pin *pin = NULL;
468 	int i, idx;
469 
470 	for (i = 1; i < pfc->info->nr_pins; i++) {
471 		if (priv->pfc.info->pins[i].pin != pin_selector)
472 			continue;
473 
474 		pin = &priv->pfc.info->pins[i];
475 		break;
476 	}
477 
478 	if (!pin)
479 		return -EINVAL;
480 
481 	idx = sh_pfc_get_pin_index(pfc, pin->pin);
482 	cfg = &pmx->configs[idx];
483 
484 	if (cfg->type != PINMUX_TYPE_NONE)
485 		return -EBUSY;
486 
487 	return sh_pfc_config_mux(pfc, pin->enum_id, PINMUX_TYPE_GPIO);
488 }
489 
sh_pfc_pinctrl_pin_set(struct udevice * dev,unsigned pin_selector,unsigned func_selector)490 static int sh_pfc_pinctrl_pin_set(struct udevice *dev, unsigned pin_selector,
491 				  unsigned func_selector)
492 {
493 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
494 	struct sh_pfc_pinctrl *pmx = &priv->pmx;
495 	struct sh_pfc *pfc = &priv->pfc;
496 	const struct sh_pfc_pin *pin = &priv->pfc.info->pins[pin_selector];
497 	int idx = sh_pfc_get_pin_index(pfc, pin->pin);
498 	struct sh_pfc_pin_config *cfg = &pmx->configs[idx];
499 
500 	if (cfg->type != PINMUX_TYPE_NONE)
501 		return -EBUSY;
502 
503 	return sh_pfc_config_mux(pfc, pin->enum_id, PINMUX_TYPE_FUNCTION);
504 }
505 
sh_pfc_pinctrl_group_set(struct udevice * dev,unsigned group_selector,unsigned func_selector)506 static int sh_pfc_pinctrl_group_set(struct udevice *dev, unsigned group_selector,
507 				     unsigned func_selector)
508 {
509 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
510 	struct sh_pfc_pinctrl *pmx = &priv->pmx;
511 	struct sh_pfc *pfc = &priv->pfc;
512 	const struct sh_pfc_pin_group *grp = &priv->pfc.info->groups[group_selector];
513 	unsigned int i;
514 	int ret = 0;
515 
516 	for (i = 0; i < grp->nr_pins; ++i) {
517 		int idx = sh_pfc_get_pin_index(pfc, grp->pins[i]);
518 		struct sh_pfc_pin_config *cfg = &pmx->configs[idx];
519 
520 		if (cfg->type != PINMUX_TYPE_NONE) {
521 			ret = -EBUSY;
522 			goto done;
523 		}
524 	}
525 
526 	for (i = 0; i < grp->nr_pins; ++i) {
527 		ret = sh_pfc_config_mux(pfc, grp->mux[i], PINMUX_TYPE_FUNCTION);
528 		if (ret < 0)
529 			break;
530 	}
531 
532 done:
533 	return ret;
534 }
535 #if CONFIG_IS_ENABLED(PINCONF)
536 static const struct pinconf_param sh_pfc_pinconf_params[] = {
537 	{ "bias-disable",	PIN_CONFIG_BIAS_DISABLE,	0 },
538 	{ "bias-pull-up",	PIN_CONFIG_BIAS_PULL_UP,	1 },
539 	{ "bias-pull-down",	PIN_CONFIG_BIAS_PULL_DOWN,	1 },
540 	{ "drive-strength",	PIN_CONFIG_DRIVE_STRENGTH,	0 },
541 	{ "power-source",	PIN_CONFIG_POWER_SOURCE,	3300 },
542 };
543 
544 static void __iomem *
sh_pfc_pinconf_find_drive_strength_reg(struct sh_pfc * pfc,unsigned int pin,unsigned int * offset,unsigned int * size)545 sh_pfc_pinconf_find_drive_strength_reg(struct sh_pfc *pfc, unsigned int pin,
546 				       unsigned int *offset, unsigned int *size)
547 {
548 	const struct pinmux_drive_reg_field *field;
549 	const struct pinmux_drive_reg *reg;
550 	unsigned int i;
551 
552 	for (reg = pfc->info->drive_regs; reg->reg; ++reg) {
553 		for (i = 0; i < ARRAY_SIZE(reg->fields); ++i) {
554 			field = &reg->fields[i];
555 
556 			if (field->size && field->pin == pin) {
557 				*offset = field->offset;
558 				*size = field->size;
559 
560 				return (void __iomem *)(uintptr_t)reg->reg;
561 			}
562 		}
563 	}
564 
565 	return NULL;
566 }
567 
sh_pfc_pinconf_set_drive_strength(struct sh_pfc * pfc,unsigned int pin,u16 strength)568 static int sh_pfc_pinconf_set_drive_strength(struct sh_pfc *pfc,
569 					     unsigned int pin, u16 strength)
570 {
571 	unsigned int offset;
572 	unsigned int size;
573 	unsigned int step;
574 	void __iomem *reg;
575 	void __iomem *unlock_reg =
576 		(void __iomem *)(uintptr_t)pfc->info->unlock_reg;
577 	u32 val;
578 
579 	reg = sh_pfc_pinconf_find_drive_strength_reg(pfc, pin, &offset, &size);
580 	if (!reg)
581 		return -EINVAL;
582 
583 	step = size == 2 ? 6 : 3;
584 
585 	if (strength < step || strength > 24)
586 		return -EINVAL;
587 
588 	/* Convert the value from mA based on a full drive strength value of
589 	 * 24mA. We can make the full value configurable later if needed.
590 	 */
591 	strength = strength / step - 1;
592 
593 	val = sh_pfc_read_raw_reg(reg, 32);
594 	val &= ~GENMASK(offset + 4 - 1, offset);
595 	val |= strength << offset;
596 
597 	if (unlock_reg)
598 		sh_pfc_write_raw_reg(unlock_reg, 32, ~val);
599 
600 	sh_pfc_write_raw_reg(reg, 32, val);
601 
602 	return 0;
603 }
604 
605 /* Check whether the requested parameter is supported for a pin. */
sh_pfc_pinconf_validate(struct sh_pfc * pfc,unsigned int _pin,unsigned int param)606 static bool sh_pfc_pinconf_validate(struct sh_pfc *pfc, unsigned int _pin,
607 				    unsigned int param)
608 {
609 	int idx = sh_pfc_get_pin_index(pfc, _pin);
610 	const struct sh_pfc_pin *pin = &pfc->info->pins[idx];
611 
612 	switch (param) {
613 	case PIN_CONFIG_BIAS_DISABLE:
614 		return pin->configs &
615 			(SH_PFC_PIN_CFG_PULL_UP | SH_PFC_PIN_CFG_PULL_DOWN);
616 
617 	case PIN_CONFIG_BIAS_PULL_UP:
618 		return pin->configs & SH_PFC_PIN_CFG_PULL_UP;
619 
620 	case PIN_CONFIG_BIAS_PULL_DOWN:
621 		return pin->configs & SH_PFC_PIN_CFG_PULL_DOWN;
622 
623 	case PIN_CONFIG_DRIVE_STRENGTH:
624 		return pin->configs & SH_PFC_PIN_CFG_DRIVE_STRENGTH;
625 
626 	case PIN_CONFIG_POWER_SOURCE:
627 		return pin->configs & SH_PFC_PIN_CFG_IO_VOLTAGE;
628 
629 	default:
630 		return false;
631 	}
632 }
633 
sh_pfc_pinconf_set(struct sh_pfc_pinctrl * pmx,unsigned _pin,unsigned int param,unsigned int arg)634 static int sh_pfc_pinconf_set(struct sh_pfc_pinctrl *pmx, unsigned _pin,
635 			      unsigned int param, unsigned int arg)
636 {
637 	struct sh_pfc *pfc = pmx->pfc;
638 	void __iomem *pocctrl;
639 	void __iomem *unlock_reg =
640 		(void __iomem *)(uintptr_t)pfc->info->unlock_reg;
641 	u32 addr, val;
642 	int bit, ret;
643 
644 	if (!sh_pfc_pinconf_validate(pfc, _pin, param))
645 		return -ENOTSUPP;
646 
647 	switch (param) {
648 	case PIN_CONFIG_BIAS_PULL_UP:
649 	case PIN_CONFIG_BIAS_PULL_DOWN:
650 	case PIN_CONFIG_BIAS_DISABLE:
651 		if (!pfc->info->ops || !pfc->info->ops->set_bias)
652 			return -ENOTSUPP;
653 
654 		pfc->info->ops->set_bias(pfc, _pin, param);
655 
656 		break;
657 
658 	case PIN_CONFIG_DRIVE_STRENGTH:
659 		ret = sh_pfc_pinconf_set_drive_strength(pfc, _pin, arg);
660 		if (ret < 0)
661 			return ret;
662 
663 		break;
664 
665 	case PIN_CONFIG_POWER_SOURCE:
666 		if (!pfc->info->ops || !pfc->info->ops->pin_to_pocctrl)
667 			return -ENOTSUPP;
668 
669 		bit = pfc->info->ops->pin_to_pocctrl(pfc, _pin, &addr);
670 		if (bit < 0) {
671 			printf("invalid pin %#x", _pin);
672 			return bit;
673 		}
674 
675 		if (arg != 1800 && arg != 3300)
676 			return -EINVAL;
677 
678 		pocctrl = (void __iomem *)(uintptr_t)addr;
679 
680 		val = sh_pfc_read_raw_reg(pocctrl, 32);
681 		if (arg == 3300)
682 			val |= BIT(bit);
683 		else
684 			val &= ~BIT(bit);
685 
686 		if (unlock_reg)
687 			sh_pfc_write_raw_reg(unlock_reg, 32, ~val);
688 
689 		sh_pfc_write_raw_reg(pocctrl, 32, val);
690 
691 		break;
692 
693 	default:
694 		return -ENOTSUPP;
695 	}
696 
697 	return 0;
698 }
699 
sh_pfc_pinconf_pin_set(struct udevice * dev,unsigned int pin_selector,unsigned int param,unsigned int arg)700 static int sh_pfc_pinconf_pin_set(struct udevice *dev,
701 				  unsigned int pin_selector,
702 				  unsigned int param, unsigned int arg)
703 {
704 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
705 	struct sh_pfc_pinctrl *pmx = &priv->pmx;
706 	struct sh_pfc *pfc = &priv->pfc;
707 	const struct sh_pfc_pin *pin = &pfc->info->pins[pin_selector];
708 
709 	sh_pfc_pinconf_set(pmx, pin->pin, param, arg);
710 
711 	return 0;
712 }
713 
sh_pfc_pinconf_group_set(struct udevice * dev,unsigned int group_selector,unsigned int param,unsigned int arg)714 static int sh_pfc_pinconf_group_set(struct udevice *dev,
715 				      unsigned int group_selector,
716 				      unsigned int param, unsigned int arg)
717 {
718 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
719 	struct sh_pfc_pinctrl *pmx = &priv->pmx;
720 	struct sh_pfc *pfc = &priv->pfc;
721 	const struct sh_pfc_pin_group *grp = &pfc->info->groups[group_selector];
722 	unsigned int i;
723 
724 	for (i = 0; i < grp->nr_pins; i++)
725 		sh_pfc_pinconf_set(pmx, grp->pins[i], param, arg);
726 
727 	return 0;
728 }
729 #endif
730 
731 static struct pinctrl_ops sh_pfc_pinctrl_ops = {
732 	.get_pins_count		= sh_pfc_pinctrl_get_pins_count,
733 	.get_pin_name		= sh_pfc_pinctrl_get_pin_name,
734 	.get_groups_count	= sh_pfc_pinctrl_get_groups_count,
735 	.get_group_name		= sh_pfc_pinctrl_get_group_name,
736 	.get_functions_count	= sh_pfc_pinctrl_get_functions_count,
737 	.get_function_name	= sh_pfc_pinctrl_get_function_name,
738 
739 #if CONFIG_IS_ENABLED(PINCONF)
740 	.pinconf_num_params	= ARRAY_SIZE(sh_pfc_pinconf_params),
741 	.pinconf_params		= sh_pfc_pinconf_params,
742 	.pinconf_set		= sh_pfc_pinconf_pin_set,
743 	.pinconf_group_set	= sh_pfc_pinconf_group_set,
744 #endif
745 	.pinmux_set		= sh_pfc_pinctrl_pin_set,
746 	.pinmux_group_set	= sh_pfc_pinctrl_group_set,
747 	.set_state		= pinctrl_generic_set_state,
748 };
749 
sh_pfc_map_pins(struct sh_pfc * pfc,struct sh_pfc_pinctrl * pmx)750 static int sh_pfc_map_pins(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx)
751 {
752 	unsigned int i;
753 
754 	/* Allocate and initialize the pins and configs arrays. */
755 	pmx->configs = kzalloc(sizeof(*pmx->configs) * pfc->info->nr_pins,
756 				    GFP_KERNEL);
757 	if (unlikely(!pmx->configs))
758 		return -ENOMEM;
759 
760 	for (i = 0; i < pfc->info->nr_pins; ++i) {
761 		struct sh_pfc_pin_config *cfg = &pmx->configs[i];
762 		cfg->type = PINMUX_TYPE_NONE;
763 	}
764 
765 	return 0;
766 }
767 
768 
sh_pfc_pinctrl_probe(struct udevice * dev)769 static int sh_pfc_pinctrl_probe(struct udevice *dev)
770 {
771 	struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
772 	enum sh_pfc_model model = dev_get_driver_data(dev);
773 	fdt_addr_t base;
774 
775 	base = devfdt_get_addr(dev);
776 	if (base == FDT_ADDR_T_NONE)
777 		return -EINVAL;
778 
779 	priv->pfc.regs = devm_ioremap(dev, base, SZ_2K);
780 	if (!priv->pfc.regs)
781 		return -ENOMEM;
782 
783 #ifdef CONFIG_PINCTRL_PFC_R8A7790
784 	if (model == SH_PFC_R8A7790)
785 		priv->pfc.info = &r8a7790_pinmux_info;
786 #endif
787 #ifdef CONFIG_PINCTRL_PFC_R8A7791
788 	if (model == SH_PFC_R8A7791)
789 		priv->pfc.info = &r8a7791_pinmux_info;
790 #endif
791 #ifdef CONFIG_PINCTRL_PFC_R8A7792
792 	if (model == SH_PFC_R8A7792)
793 		priv->pfc.info = &r8a7792_pinmux_info;
794 #endif
795 #ifdef CONFIG_PINCTRL_PFC_R8A7793
796 	if (model == SH_PFC_R8A7793)
797 		priv->pfc.info = &r8a7793_pinmux_info;
798 #endif
799 #ifdef CONFIG_PINCTRL_PFC_R8A7794
800 	if (model == SH_PFC_R8A7794)
801 		priv->pfc.info = &r8a7794_pinmux_info;
802 #endif
803 #ifdef CONFIG_PINCTRL_PFC_R8A7795
804 	if (model == SH_PFC_R8A7795)
805 		priv->pfc.info = &r8a7795_pinmux_info;
806 #endif
807 #ifdef CONFIG_PINCTRL_PFC_R8A7796
808 	if (model == SH_PFC_R8A7796)
809 		priv->pfc.info = &r8a7796_pinmux_info;
810 #endif
811 #ifdef CONFIG_PINCTRL_PFC_R8A77970
812 	if (model == SH_PFC_R8A77970)
813 		priv->pfc.info = &r8a77970_pinmux_info;
814 #endif
815 #ifdef CONFIG_PINCTRL_PFC_R8A77990
816 	if (model == SH_PFC_R8A77990)
817 		priv->pfc.info = &r8a77990_pinmux_info;
818 #endif
819 #ifdef CONFIG_PINCTRL_PFC_R8A77995
820 	if (model == SH_PFC_R8A77995)
821 		priv->pfc.info = &r8a77995_pinmux_info;
822 #endif
823 
824 	priv->pmx.pfc = &priv->pfc;
825 	sh_pfc_init_ranges(&priv->pfc);
826 	sh_pfc_map_pins(&priv->pfc, &priv->pmx);
827 
828 	return 0;
829 }
830 
831 static const struct udevice_id sh_pfc_pinctrl_ids[] = {
832 #ifdef CONFIG_PINCTRL_PFC_R8A7790
833 	{
834 		.compatible = "renesas,pfc-r8a7790",
835 		.data = SH_PFC_R8A7790,
836 	},
837 #endif
838 #ifdef CONFIG_PINCTRL_PFC_R8A7791
839 	{
840 		.compatible = "renesas,pfc-r8a7791",
841 		.data = SH_PFC_R8A7791,
842 	},
843 #endif
844 #ifdef CONFIG_PINCTRL_PFC_R8A7792
845 	{
846 		.compatible = "renesas,pfc-r8a7792",
847 		.data = SH_PFC_R8A7792,
848 	},
849 #endif
850 #ifdef CONFIG_PINCTRL_PFC_R8A7793
851 	{
852 		.compatible = "renesas,pfc-r8a7793",
853 		.data = SH_PFC_R8A7793,
854 	},
855 #endif
856 #ifdef CONFIG_PINCTRL_PFC_R8A7794
857 	{
858 		.compatible = "renesas,pfc-r8a7794",
859 		.data = SH_PFC_R8A7794,
860 	},
861 #endif
862 #ifdef CONFIG_PINCTRL_PFC_R8A7795
863 	{
864 		.compatible = "renesas,pfc-r8a7795",
865 		.data = SH_PFC_R8A7795,
866 	},
867 #endif
868 #ifdef CONFIG_PINCTRL_PFC_R8A7796
869 	{
870 		.compatible = "renesas,pfc-r8a7796",
871 		.data = SH_PFC_R8A7796,
872 	}, {
873 		.compatible = "renesas,pfc-r8a77965",
874 		.data = SH_PFC_R8A7796,
875 	},
876 #endif
877 #ifdef CONFIG_PINCTRL_PFC_R8A77970
878 	{
879 		.compatible = "renesas,pfc-r8a77970",
880 		.data = SH_PFC_R8A77970,
881 	},
882 #endif
883 #ifdef CONFIG_PINCTRL_PFC_R8A77990
884 	{
885 		.compatible = "renesas,pfc-r8a77990",
886 		.data = SH_PFC_R8A77990,
887 	},
888 #endif
889 #ifdef CONFIG_PINCTRL_PFC_R8A77995
890 	{
891 		.compatible = "renesas,pfc-r8a77995",
892 		.data = SH_PFC_R8A77995,
893 	},
894 #endif
895 	{ },
896 };
897 
898 U_BOOT_DRIVER(pinctrl_sh_pfc) = {
899 	.name		= "sh_pfc_pinctrl",
900 	.id		= UCLASS_PINCTRL,
901 	.of_match	= sh_pfc_pinctrl_ids,
902 	.priv_auto_alloc_size = sizeof(struct sh_pfc_pinctrl_priv),
903 	.ops		= &sh_pfc_pinctrl_ops,
904 	.probe		= sh_pfc_pinctrl_probe,
905 };
906