1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Pin Control and GPIO 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 */
10
11 #define DRV_NAME "sh-pfc"
12
13 #include <linux/bitops.h>
14 #include <linux/err.h>
15 #include <linux/errno.h>
16 #include <linux/init.h>
17 #include <linux/io.h>
18 #include <linux/ioport.h>
19 #include <linux/kernel.h>
20 #include <linux/math.h>
21 #include <linux/of.h>
22 #include <linux/pinctrl/machine.h>
23 #include <linux/platform_device.h>
24 #include <linux/psci.h>
25 #include <linux/slab.h>
26 #include <linux/sys_soc.h>
27
28 #include "core.h"
29
sh_pfc_map_resources(struct sh_pfc * pfc,struct platform_device * pdev)30 static int sh_pfc_map_resources(struct sh_pfc *pfc,
31 struct platform_device *pdev)
32 {
33 struct sh_pfc_window *windows;
34 unsigned int *irqs = NULL;
35 unsigned int num_windows;
36 struct resource *res;
37 unsigned int i;
38 int num_irqs;
39
40 /* Count the MEM and IRQ resources. */
41 for (num_windows = 0;; num_windows++) {
42 res = platform_get_resource(pdev, IORESOURCE_MEM, num_windows);
43 if (!res)
44 break;
45 }
46 if (num_windows == 0)
47 return -EINVAL;
48
49 num_irqs = platform_irq_count(pdev);
50 if (num_irqs < 0)
51 return num_irqs;
52
53 /* Allocate memory windows and IRQs arrays. */
54 windows = devm_kcalloc(pfc->dev, num_windows, sizeof(*windows),
55 GFP_KERNEL);
56 if (windows == NULL)
57 return -ENOMEM;
58
59 pfc->num_windows = num_windows;
60 pfc->windows = windows;
61
62 if (num_irqs) {
63 irqs = devm_kcalloc(pfc->dev, num_irqs, sizeof(*irqs),
64 GFP_KERNEL);
65 if (irqs == NULL)
66 return -ENOMEM;
67
68 pfc->num_irqs = num_irqs;
69 pfc->irqs = irqs;
70 }
71
72 /* Fill them. */
73 for (i = 0; i < num_windows; i++) {
74 windows->virt = devm_platform_get_and_ioremap_resource(pdev, i, &res);
75 if (IS_ERR(windows->virt))
76 return -ENOMEM;
77 windows->phys = res->start;
78 windows->size = resource_size(res);
79 windows++;
80 }
81 for (i = 0; i < num_irqs; i++)
82 *irqs++ = platform_get_irq(pdev, i);
83
84 return 0;
85 }
86
sh_pfc_phys_to_virt(struct sh_pfc * pfc,u32 reg)87 static void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc, u32 reg)
88 {
89 struct sh_pfc_window *window;
90 phys_addr_t address = reg;
91 unsigned int i;
92
93 /* scan through physical windows and convert address */
94 for (i = 0; i < pfc->num_windows; i++) {
95 window = pfc->windows + i;
96
97 if (address < window->phys)
98 continue;
99
100 if (address >= (window->phys + window->size))
101 continue;
102
103 return window->virt + (address - window->phys);
104 }
105
106 BUG();
107 return NULL;
108 }
109
sh_pfc_get_pin_index(struct sh_pfc * pfc,unsigned int pin)110 int sh_pfc_get_pin_index(struct sh_pfc *pfc, unsigned int pin)
111 {
112 unsigned int offset;
113 unsigned int i;
114
115 for (i = 0, offset = 0; i < pfc->nr_ranges; ++i) {
116 const struct sh_pfc_pin_range *range = &pfc->ranges[i];
117
118 if (pin <= range->end)
119 return pin >= range->start
120 ? offset + pin - range->start : -1;
121
122 offset += range->end - range->start + 1;
123 }
124
125 return -EINVAL;
126 }
127
sh_pfc_enum_in_range(u16 enum_id,const struct pinmux_range * r)128 static int sh_pfc_enum_in_range(u16 enum_id, const struct pinmux_range *r)
129 {
130 if (enum_id < r->begin)
131 return 0;
132
133 if (enum_id > r->end)
134 return 0;
135
136 return 1;
137 }
138
sh_pfc_read_raw_reg(void __iomem * mapped_reg,unsigned int reg_width)139 u32 sh_pfc_read_raw_reg(void __iomem *mapped_reg, unsigned int reg_width)
140 {
141 switch (reg_width) {
142 case 8:
143 return ioread8(mapped_reg);
144 case 16:
145 return ioread16(mapped_reg);
146 case 32:
147 return ioread32(mapped_reg);
148 }
149
150 BUG();
151 return 0;
152 }
153
sh_pfc_write_raw_reg(void __iomem * mapped_reg,unsigned int reg_width,u32 data)154 void sh_pfc_write_raw_reg(void __iomem *mapped_reg, unsigned int reg_width,
155 u32 data)
156 {
157 switch (reg_width) {
158 case 8:
159 iowrite8(data, mapped_reg);
160 return;
161 case 16:
162 iowrite16(data, mapped_reg);
163 return;
164 case 32:
165 iowrite32(data, mapped_reg);
166 return;
167 }
168
169 BUG();
170 }
171
sh_pfc_read(struct sh_pfc * pfc,u32 reg)172 u32 sh_pfc_read(struct sh_pfc *pfc, u32 reg)
173 {
174 return sh_pfc_read_raw_reg(sh_pfc_phys_to_virt(pfc, reg), 32);
175 }
176
sh_pfc_unlock_reg(struct sh_pfc * pfc,u32 reg,u32 data)177 static void sh_pfc_unlock_reg(struct sh_pfc *pfc, u32 reg, u32 data)
178 {
179 u32 unlock;
180
181 if (!pfc->info->unlock_reg)
182 return;
183
184 if (pfc->info->unlock_reg >= 0x80000000UL)
185 unlock = pfc->info->unlock_reg;
186 else
187 /* unlock_reg is a mask */
188 unlock = reg & ~pfc->info->unlock_reg;
189
190 sh_pfc_write_raw_reg(sh_pfc_phys_to_virt(pfc, unlock), 32, ~data);
191 }
192
sh_pfc_write(struct sh_pfc * pfc,u32 reg,u32 data)193 void sh_pfc_write(struct sh_pfc *pfc, u32 reg, u32 data)
194 {
195 sh_pfc_unlock_reg(pfc, reg, data);
196 sh_pfc_write_raw_reg(sh_pfc_phys_to_virt(pfc, reg), 32, data);
197 }
198
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)199 static void sh_pfc_config_reg_helper(struct sh_pfc *pfc,
200 const struct pinmux_cfg_reg *crp,
201 unsigned int in_pos,
202 void __iomem **mapped_regp, u32 *maskp,
203 unsigned int *posp)
204 {
205 unsigned int k;
206
207 *mapped_regp = sh_pfc_phys_to_virt(pfc, crp->reg);
208
209 if (crp->field_width) {
210 *maskp = (1 << crp->field_width) - 1;
211 *posp = crp->reg_width - ((in_pos + 1) * crp->field_width);
212 } else {
213 *maskp = (1 << crp->var_field_width[in_pos]) - 1;
214 *posp = crp->reg_width;
215 for (k = 0; k <= in_pos; k++)
216 *posp -= abs(crp->var_field_width[k]);
217 }
218 }
219
sh_pfc_write_config_reg(struct sh_pfc * pfc,const struct pinmux_cfg_reg * crp,unsigned int field,u32 value)220 static void sh_pfc_write_config_reg(struct sh_pfc *pfc,
221 const struct pinmux_cfg_reg *crp,
222 unsigned int field, u32 value)
223 {
224 void __iomem *mapped_reg;
225 unsigned int pos;
226 u32 mask, data;
227
228 sh_pfc_config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos);
229
230 dev_dbg(pfc->dev, "write_reg addr = %x, value = 0x%x, field = %u, "
231 "r_width = %u, f_width = %u\n",
232 crp->reg, value, field, crp->reg_width, hweight32(mask));
233
234 mask = ~(mask << pos);
235 value = value << pos;
236
237 data = sh_pfc_read_raw_reg(mapped_reg, crp->reg_width);
238 data &= mask;
239 data |= value;
240
241 sh_pfc_unlock_reg(pfc, crp->reg, data);
242 sh_pfc_write_raw_reg(mapped_reg, crp->reg_width, data);
243 }
244
sh_pfc_get_config_reg(struct sh_pfc * pfc,u16 enum_id,const struct pinmux_cfg_reg ** crp,unsigned int * fieldp,u32 * valuep)245 static int sh_pfc_get_config_reg(struct sh_pfc *pfc, u16 enum_id,
246 const struct pinmux_cfg_reg **crp,
247 unsigned int *fieldp, u32 *valuep)
248 {
249 unsigned int k = 0;
250
251 while (1) {
252 const struct pinmux_cfg_reg *config_reg =
253 pfc->info->cfg_regs + k;
254 unsigned int r_width = config_reg->reg_width;
255 unsigned int f_width = config_reg->field_width;
256 unsigned int curr_width;
257 unsigned int bit_pos;
258 unsigned int pos = 0;
259 unsigned int m = 0;
260
261 if (!r_width)
262 break;
263
264 for (bit_pos = 0; bit_pos < r_width; bit_pos += curr_width, m++) {
265 u32 ncomb;
266 u32 n;
267
268 if (f_width) {
269 curr_width = f_width;
270 } else {
271 curr_width = abs(config_reg->var_field_width[m]);
272 if (config_reg->var_field_width[m] < 0)
273 continue;
274 }
275
276 ncomb = 1 << curr_width;
277 for (n = 0; n < ncomb; n++) {
278 if (config_reg->enum_ids[pos + n] == enum_id) {
279 *crp = config_reg;
280 *fieldp = m;
281 *valuep = n;
282 return 0;
283 }
284 }
285 pos += ncomb;
286 }
287 k++;
288 }
289
290 return -EINVAL;
291 }
292
sh_pfc_mark_to_enum(struct sh_pfc * pfc,u16 mark,int pos,u16 * enum_idp)293 static int sh_pfc_mark_to_enum(struct sh_pfc *pfc, u16 mark, int pos,
294 u16 *enum_idp)
295 {
296 const u16 *data = pfc->info->pinmux_data;
297 unsigned int k;
298
299 if (pos) {
300 *enum_idp = data[pos + 1];
301 return pos + 1;
302 }
303
304 for (k = 0; k < pfc->info->pinmux_data_size; k++) {
305 if (data[k] == mark) {
306 *enum_idp = data[k + 1];
307 return k + 1;
308 }
309 }
310
311 dev_err(pfc->dev, "cannot locate data/mark enum_id for mark %d\n",
312 mark);
313 return -EINVAL;
314 }
315
sh_pfc_config_mux(struct sh_pfc * pfc,unsigned mark,int pinmux_type)316 int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
317 {
318 const struct pinmux_range *range;
319 int pos = 0;
320
321 switch (pinmux_type) {
322 case PINMUX_TYPE_GPIO:
323 case PINMUX_TYPE_FUNCTION:
324 range = NULL;
325 break;
326
327 #ifdef CONFIG_PINCTRL_SH_PFC_GPIO
328 case PINMUX_TYPE_OUTPUT:
329 range = &pfc->info->output;
330 break;
331
332 case PINMUX_TYPE_INPUT:
333 range = &pfc->info->input;
334 break;
335 #endif /* CONFIG_PINCTRL_SH_PFC_GPIO */
336
337 default:
338 return -EINVAL;
339 }
340
341 /* Iterate over all the configuration fields we need to update. */
342 while (1) {
343 const struct pinmux_cfg_reg *cr;
344 unsigned int field;
345 u16 enum_id;
346 u32 value;
347 int in_range;
348 int ret;
349
350 pos = sh_pfc_mark_to_enum(pfc, mark, pos, &enum_id);
351 if (pos < 0)
352 return pos;
353
354 if (!enum_id)
355 break;
356
357 /* Check if the configuration field selects a function. If it
358 * doesn't, skip the field if it's not applicable to the
359 * requested pinmux type.
360 */
361 in_range = sh_pfc_enum_in_range(enum_id, &pfc->info->function);
362 if (!in_range) {
363 if (pinmux_type == PINMUX_TYPE_FUNCTION) {
364 /* Functions are allowed to modify all
365 * fields.
366 */
367 in_range = 1;
368 } else if (pinmux_type != PINMUX_TYPE_GPIO) {
369 /* Input/output types can only modify fields
370 * that correspond to their respective ranges.
371 */
372 in_range = sh_pfc_enum_in_range(enum_id, range);
373
374 /*
375 * special case pass through for fixed
376 * input-only or output-only pins without
377 * function enum register association.
378 */
379 if (in_range && enum_id == range->force)
380 continue;
381 }
382 /* GPIOs are only allowed to modify function fields. */
383 }
384
385 if (!in_range)
386 continue;
387
388 ret = sh_pfc_get_config_reg(pfc, enum_id, &cr, &field, &value);
389 if (ret < 0)
390 return ret;
391
392 sh_pfc_write_config_reg(pfc, cr, field, value);
393 }
394
395 return 0;
396 }
397
sh_pfc_init_ranges(struct sh_pfc * pfc)398 static int sh_pfc_init_ranges(struct sh_pfc *pfc)
399 {
400 struct sh_pfc_pin_range *range;
401 unsigned int nr_ranges;
402 unsigned int i;
403
404 if (pfc->info->pins[0].pin == (u16)-1) {
405 /* Pin number -1 denotes that the SoC doesn't report pin numbers
406 * in its pin arrays yet. Consider the pin numbers range as
407 * continuous and allocate a single range.
408 */
409 pfc->nr_ranges = 1;
410 pfc->ranges = devm_kzalloc(pfc->dev, sizeof(*pfc->ranges),
411 GFP_KERNEL);
412 if (pfc->ranges == NULL)
413 return -ENOMEM;
414
415 pfc->ranges->start = 0;
416 pfc->ranges->end = pfc->info->nr_pins - 1;
417 pfc->nr_gpio_pins = pfc->info->nr_pins;
418
419 return 0;
420 }
421
422 /* Count, allocate and fill the ranges. The PFC SoC data pins array must
423 * be sorted by pin numbers, and pins without a GPIO port must come
424 * last.
425 */
426 for (i = 1, nr_ranges = 1; i < pfc->info->nr_pins; ++i) {
427 if (pfc->info->pins[i-1].pin != pfc->info->pins[i].pin - 1)
428 nr_ranges++;
429 }
430
431 pfc->nr_ranges = nr_ranges;
432 pfc->ranges = devm_kcalloc(pfc->dev, nr_ranges, sizeof(*pfc->ranges),
433 GFP_KERNEL);
434 if (pfc->ranges == NULL)
435 return -ENOMEM;
436
437 range = pfc->ranges;
438 range->start = pfc->info->pins[0].pin;
439
440 for (i = 1; i < pfc->info->nr_pins; ++i) {
441 if (pfc->info->pins[i-1].pin == pfc->info->pins[i].pin - 1)
442 continue;
443
444 range->end = pfc->info->pins[i-1].pin;
445 if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO))
446 pfc->nr_gpio_pins = range->end + 1;
447
448 range++;
449 range->start = pfc->info->pins[i].pin;
450 }
451
452 range->end = pfc->info->pins[i-1].pin;
453 if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO))
454 pfc->nr_gpio_pins = range->end + 1;
455
456 return 0;
457 }
458
459 #ifdef CONFIG_OF
460 static const struct of_device_id sh_pfc_of_table[] = {
461 #ifdef CONFIG_PINCTRL_PFC_EMEV2
462 {
463 .compatible = "renesas,pfc-emev2",
464 .data = &emev2_pinmux_info,
465 },
466 #endif
467 #ifdef CONFIG_PINCTRL_PFC_R8A73A4
468 {
469 .compatible = "renesas,pfc-r8a73a4",
470 .data = &r8a73a4_pinmux_info,
471 },
472 #endif
473 #ifdef CONFIG_PINCTRL_PFC_R8A7740
474 {
475 .compatible = "renesas,pfc-r8a7740",
476 .data = &r8a7740_pinmux_info,
477 },
478 #endif
479 #ifdef CONFIG_PINCTRL_PFC_R8A7742
480 {
481 .compatible = "renesas,pfc-r8a7742",
482 .data = &r8a7742_pinmux_info,
483 },
484 #endif
485 #ifdef CONFIG_PINCTRL_PFC_R8A7743
486 {
487 .compatible = "renesas,pfc-r8a7743",
488 .data = &r8a7743_pinmux_info,
489 },
490 #endif
491 #ifdef CONFIG_PINCTRL_PFC_R8A7744
492 {
493 .compatible = "renesas,pfc-r8a7744",
494 .data = &r8a7744_pinmux_info,
495 },
496 #endif
497 #ifdef CONFIG_PINCTRL_PFC_R8A7745
498 {
499 .compatible = "renesas,pfc-r8a7745",
500 .data = &r8a7745_pinmux_info,
501 },
502 #endif
503 #ifdef CONFIG_PINCTRL_PFC_R8A77470
504 {
505 .compatible = "renesas,pfc-r8a77470",
506 .data = &r8a77470_pinmux_info,
507 },
508 #endif
509 #ifdef CONFIG_PINCTRL_PFC_R8A774A1
510 {
511 .compatible = "renesas,pfc-r8a774a1",
512 .data = &r8a774a1_pinmux_info,
513 },
514 #endif
515 #ifdef CONFIG_PINCTRL_PFC_R8A774B1
516 {
517 .compatible = "renesas,pfc-r8a774b1",
518 .data = &r8a774b1_pinmux_info,
519 },
520 #endif
521 #ifdef CONFIG_PINCTRL_PFC_R8A774C0
522 {
523 .compatible = "renesas,pfc-r8a774c0",
524 .data = &r8a774c0_pinmux_info,
525 },
526 #endif
527 #ifdef CONFIG_PINCTRL_PFC_R8A774E1
528 {
529 .compatible = "renesas,pfc-r8a774e1",
530 .data = &r8a774e1_pinmux_info,
531 },
532 #endif
533 #ifdef CONFIG_PINCTRL_PFC_R8A7778
534 {
535 .compatible = "renesas,pfc-r8a7778",
536 .data = &r8a7778_pinmux_info,
537 },
538 #endif
539 #ifdef CONFIG_PINCTRL_PFC_R8A7779
540 {
541 .compatible = "renesas,pfc-r8a7779",
542 .data = &r8a7779_pinmux_info,
543 },
544 #endif
545 #ifdef CONFIG_PINCTRL_PFC_R8A7790
546 {
547 .compatible = "renesas,pfc-r8a7790",
548 .data = &r8a7790_pinmux_info,
549 },
550 #endif
551 #ifdef CONFIG_PINCTRL_PFC_R8A7791
552 {
553 .compatible = "renesas,pfc-r8a7791",
554 .data = &r8a7791_pinmux_info,
555 },
556 #endif
557 #ifdef CONFIG_PINCTRL_PFC_R8A7792
558 {
559 .compatible = "renesas,pfc-r8a7792",
560 .data = &r8a7792_pinmux_info,
561 },
562 #endif
563 #ifdef CONFIG_PINCTRL_PFC_R8A7793
564 {
565 .compatible = "renesas,pfc-r8a7793",
566 .data = &r8a7793_pinmux_info,
567 },
568 #endif
569 #ifdef CONFIG_PINCTRL_PFC_R8A7794
570 {
571 .compatible = "renesas,pfc-r8a7794",
572 .data = &r8a7794_pinmux_info,
573 },
574 #endif
575 #ifdef CONFIG_PINCTRL_PFC_R8A77951
576 {
577 .compatible = "renesas,pfc-r8a7795",
578 .data = &r8a77951_pinmux_info,
579 },
580 #endif
581 #ifdef CONFIG_PINCTRL_PFC_R8A77960
582 {
583 .compatible = "renesas,pfc-r8a7796",
584 .data = &r8a77960_pinmux_info,
585 },
586 #endif
587 #ifdef CONFIG_PINCTRL_PFC_R8A77961
588 {
589 .compatible = "renesas,pfc-r8a77961",
590 .data = &r8a77961_pinmux_info,
591 },
592 #endif
593 #ifdef CONFIG_PINCTRL_PFC_R8A77965
594 {
595 .compatible = "renesas,pfc-r8a77965",
596 .data = &r8a77965_pinmux_info,
597 },
598 #endif
599 #ifdef CONFIG_PINCTRL_PFC_R8A77970
600 {
601 .compatible = "renesas,pfc-r8a77970",
602 .data = &r8a77970_pinmux_info,
603 },
604 #endif
605 #ifdef CONFIG_PINCTRL_PFC_R8A77980
606 {
607 .compatible = "renesas,pfc-r8a77980",
608 .data = &r8a77980_pinmux_info,
609 },
610 #endif
611 #ifdef CONFIG_PINCTRL_PFC_R8A77990
612 {
613 .compatible = "renesas,pfc-r8a77990",
614 .data = &r8a77990_pinmux_info,
615 },
616 #endif
617 #ifdef CONFIG_PINCTRL_PFC_R8A77995
618 {
619 .compatible = "renesas,pfc-r8a77995",
620 .data = &r8a77995_pinmux_info,
621 },
622 #endif
623 #ifdef CONFIG_PINCTRL_PFC_R8A779A0
624 {
625 .compatible = "renesas,pfc-r8a779a0",
626 .data = &r8a779a0_pinmux_info,
627 },
628 #endif
629 #ifdef CONFIG_PINCTRL_PFC_R8A779F0
630 {
631 .compatible = "renesas,pfc-r8a779f0",
632 .data = &r8a779f0_pinmux_info,
633 },
634 #endif
635 #ifdef CONFIG_PINCTRL_PFC_R8A779G0
636 {
637 .compatible = "renesas,pfc-r8a779g0",
638 .data = &r8a779g0_pinmux_info,
639 },
640 #endif
641 #ifdef CONFIG_PINCTRL_PFC_SH73A0
642 {
643 .compatible = "renesas,pfc-sh73a0",
644 .data = &sh73a0_pinmux_info,
645 },
646 #endif
647 { /* sentinel */ }
648 };
649 #endif
650
651 #if defined(CONFIG_ARM_PSCI_FW)
sh_pfc_nop_reg(struct sh_pfc * pfc,u32 reg,unsigned int idx)652 static void sh_pfc_nop_reg(struct sh_pfc *pfc, u32 reg, unsigned int idx)
653 {
654 }
655
sh_pfc_save_reg(struct sh_pfc * pfc,u32 reg,unsigned int idx)656 static void sh_pfc_save_reg(struct sh_pfc *pfc, u32 reg, unsigned int idx)
657 {
658 pfc->saved_regs[idx] = sh_pfc_read(pfc, reg);
659 }
660
sh_pfc_restore_reg(struct sh_pfc * pfc,u32 reg,unsigned int idx)661 static void sh_pfc_restore_reg(struct sh_pfc *pfc, u32 reg, unsigned int idx)
662 {
663 sh_pfc_write(pfc, reg, pfc->saved_regs[idx]);
664 }
665
sh_pfc_walk_regs(struct sh_pfc * pfc,void (* do_reg)(struct sh_pfc * pfc,u32 reg,unsigned int idx))666 static unsigned int sh_pfc_walk_regs(struct sh_pfc *pfc,
667 void (*do_reg)(struct sh_pfc *pfc, u32 reg, unsigned int idx))
668 {
669 unsigned int i, n = 0;
670
671 if (pfc->info->cfg_regs)
672 for (i = 0; pfc->info->cfg_regs[i].reg; i++)
673 do_reg(pfc, pfc->info->cfg_regs[i].reg, n++);
674
675 if (pfc->info->drive_regs)
676 for (i = 0; pfc->info->drive_regs[i].reg; i++)
677 do_reg(pfc, pfc->info->drive_regs[i].reg, n++);
678
679 if (pfc->info->bias_regs)
680 for (i = 0; pfc->info->bias_regs[i].puen ||
681 pfc->info->bias_regs[i].pud; i++) {
682 if (pfc->info->bias_regs[i].puen)
683 do_reg(pfc, pfc->info->bias_regs[i].puen, n++);
684 if (pfc->info->bias_regs[i].pud)
685 do_reg(pfc, pfc->info->bias_regs[i].pud, n++);
686 }
687
688 if (pfc->info->ioctrl_regs)
689 for (i = 0; pfc->info->ioctrl_regs[i].reg; i++)
690 do_reg(pfc, pfc->info->ioctrl_regs[i].reg, n++);
691
692 return n;
693 }
694
sh_pfc_suspend_init(struct sh_pfc * pfc)695 static int sh_pfc_suspend_init(struct sh_pfc *pfc)
696 {
697 unsigned int n;
698
699 /* This is the best we can do to check for the presence of PSCI */
700 if (!psci_ops.cpu_suspend)
701 return 0;
702
703 n = sh_pfc_walk_regs(pfc, sh_pfc_nop_reg);
704 if (!n)
705 return 0;
706
707 pfc->saved_regs = devm_kmalloc_array(pfc->dev, n,
708 sizeof(*pfc->saved_regs),
709 GFP_KERNEL);
710 if (!pfc->saved_regs)
711 return -ENOMEM;
712
713 dev_dbg(pfc->dev, "Allocated space to save %u regs\n", n);
714 return 0;
715 }
716
sh_pfc_suspend_noirq(struct device * dev)717 static int sh_pfc_suspend_noirq(struct device *dev)
718 {
719 struct sh_pfc *pfc = dev_get_drvdata(dev);
720
721 if (pfc->saved_regs)
722 sh_pfc_walk_regs(pfc, sh_pfc_save_reg);
723 return 0;
724 }
725
sh_pfc_resume_noirq(struct device * dev)726 static int sh_pfc_resume_noirq(struct device *dev)
727 {
728 struct sh_pfc *pfc = dev_get_drvdata(dev);
729
730 if (pfc->saved_regs)
731 sh_pfc_walk_regs(pfc, sh_pfc_restore_reg);
732 return 0;
733 }
734 #else
sh_pfc_suspend_init(struct sh_pfc * pfc)735 static int sh_pfc_suspend_init(struct sh_pfc *pfc) { return 0; }
sh_pfc_suspend_noirq(struct device * dev)736 static int sh_pfc_suspend_noirq(struct device *dev) { return 0; }
sh_pfc_resume_noirq(struct device * dev)737 static int sh_pfc_resume_noirq(struct device *dev) { return 0; }
738 #endif /* CONFIG_ARM_PSCI_FW */
739
740 static DEFINE_NOIRQ_DEV_PM_OPS(sh_pfc_pm, sh_pfc_suspend_noirq, sh_pfc_resume_noirq);
741
742 #ifdef DEBUG
743 #define SH_PFC_MAX_REGS 300
744 #define SH_PFC_MAX_ENUMS 5000
745
746 static unsigned int sh_pfc_errors __initdata;
747 static unsigned int sh_pfc_warnings __initdata;
748 static bool sh_pfc_bias_done __initdata;
749 static bool sh_pfc_drive_done __initdata;
750 static bool sh_pfc_power_done __initdata;
751 static struct {
752 u32 reg;
753 u32 bits;
754 } *sh_pfc_regs __initdata;
755 static u32 sh_pfc_num_regs __initdata;
756 static u16 *sh_pfc_enums __initdata;
757 static u32 sh_pfc_num_enums __initdata;
758
759 #define sh_pfc_err(fmt, ...) \
760 do { \
761 pr_err("%s: " fmt, drvname, ##__VA_ARGS__); \
762 sh_pfc_errors++; \
763 } while (0)
764
765 #define sh_pfc_err_once(type, fmt, ...) \
766 do { \
767 if (!sh_pfc_ ## type ## _done) { \
768 sh_pfc_ ## type ## _done = true; \
769 sh_pfc_err(fmt, ##__VA_ARGS__); \
770 } \
771 } while (0)
772
773 #define sh_pfc_warn(fmt, ...) \
774 do { \
775 pr_warn("%s: " fmt, drvname, ##__VA_ARGS__); \
776 sh_pfc_warnings++; \
777 } while (0)
778
is0s(const u16 * enum_ids,unsigned int n)779 static bool __init is0s(const u16 *enum_ids, unsigned int n)
780 {
781 unsigned int i;
782
783 for (i = 0; i < n; i++)
784 if (enum_ids[i])
785 return false;
786
787 return true;
788 }
789
same_name(const char * a,const char * b)790 static bool __init same_name(const char *a, const char *b)
791 {
792 return a && b && !strcmp(a, b);
793 }
794
sh_pfc_check_reg(const char * drvname,u32 reg,u32 bits)795 static void __init sh_pfc_check_reg(const char *drvname, u32 reg, u32 bits)
796 {
797 unsigned int i;
798
799 for (i = 0; i < sh_pfc_num_regs; i++) {
800 if (reg != sh_pfc_regs[i].reg)
801 continue;
802
803 if (bits & sh_pfc_regs[i].bits)
804 sh_pfc_err("reg 0x%x: bits 0x%x conflict\n", reg,
805 bits & sh_pfc_regs[i].bits);
806
807 sh_pfc_regs[i].bits |= bits;
808 return;
809 }
810
811 if (sh_pfc_num_regs == SH_PFC_MAX_REGS) {
812 pr_warn_once("%s: Please increase SH_PFC_MAX_REGS\n", drvname);
813 return;
814 }
815
816 sh_pfc_regs[sh_pfc_num_regs].reg = reg;
817 sh_pfc_regs[sh_pfc_num_regs].bits = bits;
818 sh_pfc_num_regs++;
819 }
820
sh_pfc_check_enum(const char * drvname,u16 enum_id)821 static int __init sh_pfc_check_enum(const char *drvname, u16 enum_id)
822 {
823 unsigned int i;
824
825 for (i = 0; i < sh_pfc_num_enums; i++) {
826 if (enum_id == sh_pfc_enums[i])
827 return -EINVAL;
828 }
829
830 if (sh_pfc_num_enums == SH_PFC_MAX_ENUMS) {
831 pr_warn_once("%s: Please increase SH_PFC_MAX_ENUMS\n", drvname);
832 return 0;
833 }
834
835 sh_pfc_enums[sh_pfc_num_enums++] = enum_id;
836 return 0;
837 }
838
sh_pfc_check_reg_enums(const char * drvname,u32 reg,const u16 * enums,unsigned int n)839 static void __init sh_pfc_check_reg_enums(const char *drvname, u32 reg,
840 const u16 *enums, unsigned int n)
841 {
842 unsigned int i;
843
844 for (i = 0; i < n; i++) {
845 if (enums[i] && sh_pfc_check_enum(drvname, enums[i]))
846 sh_pfc_err("reg 0x%x enum_id %u conflict\n", reg,
847 enums[i]);
848 }
849 }
850
sh_pfc_find_pin(const struct sh_pfc_soc_info * info,u32 reg,unsigned int pin)851 static const struct sh_pfc_pin __init *sh_pfc_find_pin(
852 const struct sh_pfc_soc_info *info, u32 reg, unsigned int pin)
853 {
854 const char *drvname = info->name;
855 unsigned int i;
856
857 if (pin == SH_PFC_PIN_NONE)
858 return NULL;
859
860 for (i = 0; i < info->nr_pins; i++) {
861 if (pin == info->pins[i].pin)
862 return &info->pins[i];
863 }
864
865 sh_pfc_err("reg 0x%x: pin %u not found\n", reg, pin);
866 return NULL;
867 }
868
sh_pfc_check_cfg_reg(const char * drvname,const struct pinmux_cfg_reg * cfg_reg)869 static void __init sh_pfc_check_cfg_reg(const char *drvname,
870 const struct pinmux_cfg_reg *cfg_reg)
871 {
872 unsigned int i, n, rw, r;
873 int fw;
874
875 sh_pfc_check_reg(drvname, cfg_reg->reg,
876 GENMASK(cfg_reg->reg_width - 1, 0));
877
878 if (cfg_reg->field_width) {
879 fw = cfg_reg->field_width;
880 n = (cfg_reg->reg_width / fw) << fw;
881 for (i = 0, r = 0; i < n; i += 1 << fw) {
882 if (is0s(&cfg_reg->enum_ids[i], 1 << fw))
883 r++;
884 }
885
886 if ((r << fw) * sizeof(u16) > cfg_reg->reg_width / fw)
887 sh_pfc_warn("reg 0x%x can be described with variable-width reserved fields\n",
888 cfg_reg->reg);
889
890 /* Skip field checks (done at build time) */
891 goto check_enum_ids;
892 }
893
894 for (i = 0, n = 0, rw = 0; (fw = cfg_reg->var_field_width[i]); i++) {
895 if (fw < 0) {
896 rw += -fw;
897 } else {
898 if (is0s(&cfg_reg->enum_ids[n], 1 << fw))
899 sh_pfc_warn("reg 0x%x: field [%u:%u] can be described as reserved\n",
900 cfg_reg->reg, rw, rw + fw - 1);
901 n += 1 << fw;
902 rw += fw;
903 }
904 }
905
906 if (rw != cfg_reg->reg_width)
907 sh_pfc_err("reg 0x%x: var_field_width declares %u instead of %u bits\n",
908 cfg_reg->reg, rw, cfg_reg->reg_width);
909
910 if (n != cfg_reg->nr_enum_ids)
911 sh_pfc_err("reg 0x%x: enum_ids[] has %u instead of %u values\n",
912 cfg_reg->reg, cfg_reg->nr_enum_ids, n);
913
914 check_enum_ids:
915 sh_pfc_check_reg_enums(drvname, cfg_reg->reg, cfg_reg->enum_ids, n);
916 }
917
sh_pfc_check_drive_reg(const struct sh_pfc_soc_info * info,const struct pinmux_drive_reg * drive)918 static void __init sh_pfc_check_drive_reg(const struct sh_pfc_soc_info *info,
919 const struct pinmux_drive_reg *drive)
920 {
921 const char *drvname = info->name;
922 const struct sh_pfc_pin *pin;
923 unsigned int i;
924
925 for (i = 0; i < ARRAY_SIZE(drive->fields); i++) {
926 const struct pinmux_drive_reg_field *field = &drive->fields[i];
927
928 if (!field->pin && !field->offset && !field->size)
929 continue;
930
931 sh_pfc_check_reg(info->name, drive->reg,
932 GENMASK(field->offset + field->size - 1,
933 field->offset));
934
935 pin = sh_pfc_find_pin(info, drive->reg, field->pin);
936 if (pin && !(pin->configs & SH_PFC_PIN_CFG_DRIVE_STRENGTH))
937 sh_pfc_err("drive_reg 0x%x: field %u: pin %s lacks SH_PFC_PIN_CFG_DRIVE_STRENGTH flag\n",
938 drive->reg, i, pin->name);
939 }
940 }
941
sh_pfc_check_bias_reg(const struct sh_pfc_soc_info * info,const struct pinmux_bias_reg * bias)942 static void __init sh_pfc_check_bias_reg(const struct sh_pfc_soc_info *info,
943 const struct pinmux_bias_reg *bias)
944 {
945 const char *drvname = info->name;
946 const struct sh_pfc_pin *pin;
947 unsigned int i;
948 u32 bits;
949
950 for (i = 0, bits = 0; i < ARRAY_SIZE(bias->pins); i++)
951 if (bias->pins[i] != SH_PFC_PIN_NONE)
952 bits |= BIT(i);
953
954 if (bias->puen)
955 sh_pfc_check_reg(info->name, bias->puen, bits);
956 if (bias->pud)
957 sh_pfc_check_reg(info->name, bias->pud, bits);
958 for (i = 0; i < ARRAY_SIZE(bias->pins); i++) {
959 pin = sh_pfc_find_pin(info, bias->puen, bias->pins[i]);
960 if (!pin)
961 continue;
962
963 if (bias->puen && bias->pud) {
964 /*
965 * Pull-enable and pull-up/down control registers
966 * As some SoCs have pins that support only pull-up
967 * or pull-down, we just check for one of them
968 */
969 if (!(pin->configs & SH_PFC_PIN_CFG_PULL_UP_DOWN))
970 sh_pfc_err("bias_reg 0x%x:%u: pin %s lacks one or more SH_PFC_PIN_CFG_PULL_* flags\n",
971 bias->puen, i, pin->name);
972 } else if (bias->puen) {
973 /* Pull-up control register only */
974 if (!(pin->configs & SH_PFC_PIN_CFG_PULL_UP))
975 sh_pfc_err("bias_reg 0x%x:%u: pin %s lacks SH_PFC_PIN_CFG_PULL_UP flag\n",
976 bias->puen, i, pin->name);
977 } else if (bias->pud) {
978 /* Pull-down control register only */
979 if (!(pin->configs & SH_PFC_PIN_CFG_PULL_DOWN))
980 sh_pfc_err("bias_reg 0x%x:%u: pin %s lacks SH_PFC_PIN_CFG_PULL_DOWN flag\n",
981 bias->pud, i, pin->name);
982 }
983 }
984 }
985
sh_pfc_compare_groups(const char * drvname,const struct sh_pfc_pin_group * a,const struct sh_pfc_pin_group * b)986 static void __init sh_pfc_compare_groups(const char *drvname,
987 const struct sh_pfc_pin_group *a,
988 const struct sh_pfc_pin_group *b)
989 {
990 unsigned int i;
991 size_t len;
992
993 if (same_name(a->name, b->name))
994 sh_pfc_err("group %s: name conflict\n", a->name);
995
996 if (a->nr_pins > b->nr_pins)
997 swap(a, b);
998
999 len = a->nr_pins * sizeof(a->pins[0]);
1000 for (i = 0; i <= b->nr_pins - a->nr_pins; i++) {
1001 if (a->pins == b->pins + i || a->mux == b->mux + i ||
1002 memcmp(a->pins, b->pins + i, len) ||
1003 memcmp(a->mux, b->mux + i, len))
1004 continue;
1005
1006 if (a->nr_pins == b->nr_pins)
1007 sh_pfc_warn("group %s can be an alias for %s\n",
1008 a->name, b->name);
1009 else
1010 sh_pfc_warn("group %s is a subset of %s\n", a->name,
1011 b->name);
1012 }
1013 }
1014
sh_pfc_check_info(const struct sh_pfc_soc_info * info)1015 static void __init sh_pfc_check_info(const struct sh_pfc_soc_info *info)
1016 {
1017 const struct pinmux_drive_reg *drive_regs = info->drive_regs;
1018 #define drive_nfields ARRAY_SIZE(drive_regs->fields)
1019 #define drive_ofs(i) drive_regs[(i) / drive_nfields]
1020 #define drive_reg(i) drive_ofs(i).reg
1021 #define drive_bit(i) ((i) % drive_nfields)
1022 #define drive_field(i) drive_ofs(i).fields[drive_bit(i)]
1023 const struct pinmux_bias_reg *bias_regs = info->bias_regs;
1024 #define bias_npins ARRAY_SIZE(bias_regs->pins)
1025 #define bias_ofs(i) bias_regs[(i) / bias_npins]
1026 #define bias_puen(i) bias_ofs(i).puen
1027 #define bias_pud(i) bias_ofs(i).pud
1028 #define bias_bit(i) ((i) % bias_npins)
1029 #define bias_pin(i) bias_ofs(i).pins[bias_bit(i)]
1030 const char *drvname = info->name;
1031 unsigned int *refcnts;
1032 unsigned int i, j, k;
1033
1034 pr_info("sh_pfc: Checking %s\n", drvname);
1035 sh_pfc_num_regs = 0;
1036 sh_pfc_num_enums = 0;
1037 sh_pfc_bias_done = false;
1038 sh_pfc_drive_done = false;
1039 sh_pfc_power_done = false;
1040
1041 /* Check pins */
1042 for (i = 0; i < info->nr_pins; i++) {
1043 const struct sh_pfc_pin *pin = &info->pins[i];
1044 unsigned int x;
1045
1046 if (!pin->name) {
1047 sh_pfc_err("empty pin %u\n", i);
1048 continue;
1049 }
1050 for (j = 0; j < i; j++) {
1051 const struct sh_pfc_pin *pin2 = &info->pins[j];
1052
1053 if (same_name(pin->name, pin2->name))
1054 sh_pfc_err("pin %s: name conflict\n",
1055 pin->name);
1056
1057 if (pin->pin != (u16)-1 && pin->pin == pin2->pin)
1058 sh_pfc_err("pin %s/%s: pin %u conflict\n",
1059 pin->name, pin2->name, pin->pin);
1060
1061 if (pin->enum_id && pin->enum_id == pin2->enum_id)
1062 sh_pfc_err("pin %s/%s: enum_id %u conflict\n",
1063 pin->name, pin2->name,
1064 pin->enum_id);
1065 }
1066
1067 if (pin->configs & SH_PFC_PIN_CFG_PULL_UP_DOWN) {
1068 if (!info->ops || !info->ops->get_bias ||
1069 !info->ops->set_bias)
1070 sh_pfc_err_once(bias, "SH_PFC_PIN_CFG_PULL_* flag set but .[gs]et_bias() not implemented\n");
1071
1072 if (!bias_regs &&
1073 (!info->ops || !info->ops->pin_to_portcr))
1074 sh_pfc_err_once(bias, "SH_PFC_PIN_CFG_PULL_UP flag set but no bias_regs defined and .pin_to_portcr() not implemented\n");
1075 }
1076
1077 if ((pin->configs & SH_PFC_PIN_CFG_PULL_UP_DOWN) && bias_regs) {
1078 const struct pinmux_bias_reg *bias_reg =
1079 rcar_pin_to_bias_reg(info, pin->pin, &x);
1080
1081 if (!bias_reg ||
1082 ((pin->configs & SH_PFC_PIN_CFG_PULL_UP) &&
1083 !bias_reg->puen))
1084 sh_pfc_err("pin %s: SH_PFC_PIN_CFG_PULL_UP flag set but pin not in bias_regs\n",
1085 pin->name);
1086
1087 if (!bias_reg ||
1088 ((pin->configs & SH_PFC_PIN_CFG_PULL_DOWN) &&
1089 !bias_reg->pud))
1090 sh_pfc_err("pin %s: SH_PFC_PIN_CFG_PULL_DOWN flag set but pin not in bias_regs\n",
1091 pin->name);
1092 }
1093
1094 if (pin->configs & SH_PFC_PIN_CFG_DRIVE_STRENGTH) {
1095 if (!drive_regs) {
1096 sh_pfc_err_once(drive, "SH_PFC_PIN_CFG_DRIVE_STRENGTH flag set but drive_regs missing\n");
1097 } else {
1098 for (j = 0; drive_reg(j); j++) {
1099 if (!drive_field(j).pin &&
1100 !drive_field(j).offset &&
1101 !drive_field(j).size)
1102 continue;
1103
1104 if (drive_field(j).pin == pin->pin)
1105 break;
1106 }
1107
1108 if (!drive_reg(j))
1109 sh_pfc_err("pin %s: SH_PFC_PIN_CFG_DRIVE_STRENGTH flag set but not in drive_regs\n",
1110 pin->name);
1111 }
1112 }
1113
1114 if (pin->configs & SH_PFC_PIN_CFG_IO_VOLTAGE_MASK) {
1115 if (!info->ops || !info->ops->pin_to_pocctrl)
1116 sh_pfc_err_once(power, "SH_PFC_PIN_CFG_IO_VOLTAGE set but .pin_to_pocctrl() not implemented\n");
1117 else if (info->ops->pin_to_pocctrl(pin->pin, &x) < 0)
1118 sh_pfc_err("pin %s: SH_PFC_PIN_CFG_IO_VOLTAGE set but invalid pin_to_pocctrl()\n",
1119 pin->name);
1120 } else if (info->ops && info->ops->pin_to_pocctrl &&
1121 info->ops->pin_to_pocctrl(pin->pin, &x) >= 0) {
1122 sh_pfc_warn("pin %s: SH_PFC_PIN_CFG_IO_VOLTAGE not set but valid pin_to_pocctrl()\n",
1123 pin->name);
1124 }
1125 }
1126
1127 /* Check groups and functions */
1128 refcnts = kcalloc(info->nr_groups, sizeof(*refcnts), GFP_KERNEL);
1129 if (!refcnts)
1130 return;
1131
1132 for (i = 0; i < info->nr_functions; i++) {
1133 const struct sh_pfc_function *func = &info->functions[i];
1134
1135 if (!func->name) {
1136 sh_pfc_err("empty function %u\n", i);
1137 continue;
1138 }
1139 for (j = 0; j < i; j++) {
1140 if (same_name(func->name, info->functions[j].name))
1141 sh_pfc_err("function %s: name conflict\n",
1142 func->name);
1143 }
1144 for (j = 0; j < func->nr_groups; j++) {
1145 for (k = 0; k < info->nr_groups; k++) {
1146 if (same_name(func->groups[j],
1147 info->groups[k].name)) {
1148 refcnts[k]++;
1149 break;
1150 }
1151 }
1152
1153 if (k == info->nr_groups)
1154 sh_pfc_err("function %s: group %s not found\n",
1155 func->name, func->groups[j]);
1156 }
1157 }
1158
1159 for (i = 0; i < info->nr_groups; i++) {
1160 const struct sh_pfc_pin_group *group = &info->groups[i];
1161
1162 if (!group->name) {
1163 sh_pfc_err("empty group %u\n", i);
1164 continue;
1165 }
1166 for (j = 0; j < i; j++)
1167 sh_pfc_compare_groups(drvname, group, &info->groups[j]);
1168
1169 if (!refcnts[i])
1170 sh_pfc_err("orphan group %s\n", group->name);
1171 else if (refcnts[i] > 1)
1172 sh_pfc_warn("group %s referenced by %u functions\n",
1173 group->name, refcnts[i]);
1174 }
1175
1176 kfree(refcnts);
1177
1178 /* Check config register descriptions */
1179 for (i = 0; info->cfg_regs && info->cfg_regs[i].reg; i++)
1180 sh_pfc_check_cfg_reg(drvname, &info->cfg_regs[i]);
1181
1182 /* Check drive strength registers */
1183 for (i = 0; drive_regs && drive_regs[i].reg; i++)
1184 sh_pfc_check_drive_reg(info, &drive_regs[i]);
1185
1186 for (i = 0; drive_regs && drive_reg(i); i++) {
1187 if (!drive_field(i).pin && !drive_field(i).offset &&
1188 !drive_field(i).size)
1189 continue;
1190
1191 for (j = 0; j < i; j++) {
1192 if (drive_field(i).pin == drive_field(j).pin &&
1193 drive_field(j).offset && drive_field(j).size) {
1194 sh_pfc_err("drive_reg 0x%x:%zu/0x%x:%zu: pin conflict\n",
1195 drive_reg(i), drive_bit(i),
1196 drive_reg(j), drive_bit(j));
1197 }
1198 }
1199 }
1200
1201 /* Check bias registers */
1202 for (i = 0; bias_regs && (bias_regs[i].puen || bias_regs[i].pud); i++)
1203 sh_pfc_check_bias_reg(info, &bias_regs[i]);
1204
1205 for (i = 0; bias_regs && (bias_puen(i) || bias_pud(i)); i++) {
1206 if (bias_pin(i) == SH_PFC_PIN_NONE)
1207 continue;
1208
1209 for (j = 0; j < i; j++) {
1210 if (bias_pin(i) != bias_pin(j))
1211 continue;
1212
1213 if (bias_puen(i) && bias_puen(j))
1214 sh_pfc_err("bias_reg 0x%x:%zu/0x%x:%zu: pin conflict\n",
1215 bias_puen(i), bias_bit(i),
1216 bias_puen(j), bias_bit(j));
1217 if (bias_pud(i) && bias_pud(j))
1218 sh_pfc_err("bias_reg 0x%x:%zu/0x%x:%zu: pin conflict\n",
1219 bias_pud(i), bias_bit(i),
1220 bias_pud(j), bias_bit(j));
1221 }
1222 }
1223
1224 /* Check ioctrl registers */
1225 for (i = 0; info->ioctrl_regs && info->ioctrl_regs[i].reg; i++)
1226 sh_pfc_check_reg(drvname, info->ioctrl_regs[i].reg, U32_MAX);
1227
1228 /* Check data registers */
1229 for (i = 0; info->data_regs && info->data_regs[i].reg; i++) {
1230 sh_pfc_check_reg(drvname, info->data_regs[i].reg,
1231 GENMASK(info->data_regs[i].reg_width - 1, 0));
1232 sh_pfc_check_reg_enums(drvname, info->data_regs[i].reg,
1233 info->data_regs[i].enum_ids,
1234 info->data_regs[i].reg_width);
1235 }
1236
1237 #ifdef CONFIG_PINCTRL_SH_FUNC_GPIO
1238 /* Check function GPIOs */
1239 for (i = 0; i < info->nr_func_gpios; i++) {
1240 const struct pinmux_func *func = &info->func_gpios[i];
1241
1242 if (!func->name) {
1243 sh_pfc_err("empty function gpio %u\n", i);
1244 continue;
1245 }
1246 for (j = 0; j < i; j++) {
1247 if (same_name(func->name, info->func_gpios[j].name))
1248 sh_pfc_err("func_gpio %s: name conflict\n",
1249 func->name);
1250 }
1251 if (sh_pfc_check_enum(drvname, func->enum_id))
1252 sh_pfc_err("%s enum_id %u conflict\n", func->name,
1253 func->enum_id);
1254 }
1255 #endif
1256 }
1257
sh_pfc_check_driver(const struct platform_driver * pdrv)1258 static void __init sh_pfc_check_driver(const struct platform_driver *pdrv)
1259 {
1260 unsigned int i;
1261
1262 if (!IS_ENABLED(CONFIG_SUPERH) &&
1263 !of_find_matching_node(NULL, pdrv->driver.of_match_table))
1264 return;
1265
1266 sh_pfc_regs = kcalloc(SH_PFC_MAX_REGS, sizeof(*sh_pfc_regs),
1267 GFP_KERNEL);
1268 if (!sh_pfc_regs)
1269 return;
1270
1271 sh_pfc_enums = kcalloc(SH_PFC_MAX_ENUMS, sizeof(*sh_pfc_enums),
1272 GFP_KERNEL);
1273 if (!sh_pfc_enums)
1274 goto free_regs;
1275
1276 pr_warn("sh_pfc: Checking builtin pinmux tables\n");
1277
1278 for (i = 0; pdrv->id_table[i].name[0]; i++)
1279 sh_pfc_check_info((void *)pdrv->id_table[i].driver_data);
1280
1281 #ifdef CONFIG_OF
1282 for (i = 0; pdrv->driver.of_match_table[i].compatible[0]; i++)
1283 sh_pfc_check_info(pdrv->driver.of_match_table[i].data);
1284 #endif
1285
1286 pr_warn("sh_pfc: Detected %u errors and %u warnings\n", sh_pfc_errors,
1287 sh_pfc_warnings);
1288
1289 kfree(sh_pfc_enums);
1290 free_regs:
1291 kfree(sh_pfc_regs);
1292 }
1293
1294 #else /* !DEBUG */
sh_pfc_check_driver(struct platform_driver * pdrv)1295 static inline void sh_pfc_check_driver(struct platform_driver *pdrv) {}
1296 #endif /* !DEBUG */
1297
sh_pfc_probe(struct platform_device * pdev)1298 static int sh_pfc_probe(struct platform_device *pdev)
1299 {
1300 const struct sh_pfc_soc_info *info;
1301 struct sh_pfc *pfc;
1302 int ret;
1303
1304 if (pdev->dev.of_node)
1305 info = of_device_get_match_data(&pdev->dev);
1306 else
1307 info = (const void *)platform_get_device_id(pdev)->driver_data;
1308
1309 pfc = devm_kzalloc(&pdev->dev, sizeof(*pfc), GFP_KERNEL);
1310 if (pfc == NULL)
1311 return -ENOMEM;
1312
1313 pfc->info = info;
1314 pfc->dev = &pdev->dev;
1315
1316 ret = sh_pfc_map_resources(pfc, pdev);
1317 if (unlikely(ret < 0))
1318 return ret;
1319
1320 spin_lock_init(&pfc->lock);
1321
1322 if (info->ops && info->ops->init) {
1323 ret = info->ops->init(pfc);
1324 if (ret < 0)
1325 return ret;
1326
1327 /* .init() may have overridden pfc->info */
1328 info = pfc->info;
1329 }
1330
1331 ret = sh_pfc_suspend_init(pfc);
1332 if (ret)
1333 return ret;
1334
1335 /* Enable dummy states for those platforms without pinctrl support */
1336 if (!of_have_populated_dt())
1337 pinctrl_provide_dummies();
1338
1339 ret = sh_pfc_init_ranges(pfc);
1340 if (ret < 0)
1341 return ret;
1342
1343 /*
1344 * Initialize pinctrl bindings first
1345 */
1346 ret = sh_pfc_register_pinctrl(pfc);
1347 if (unlikely(ret != 0))
1348 return ret;
1349
1350 #ifdef CONFIG_PINCTRL_SH_PFC_GPIO
1351 /*
1352 * Then the GPIO chip
1353 */
1354 ret = sh_pfc_register_gpiochip(pfc);
1355 if (unlikely(ret != 0)) {
1356 /*
1357 * If the GPIO chip fails to come up we still leave the
1358 * PFC state as it is, given that there are already
1359 * extant users of it that have succeeded by this point.
1360 */
1361 dev_notice(pfc->dev, "failed to init GPIO chip, ignoring...\n");
1362 }
1363 #endif
1364
1365 platform_set_drvdata(pdev, pfc);
1366
1367 dev_info(pfc->dev, "%s support registered\n", info->name);
1368
1369 return 0;
1370 }
1371
1372 static const struct platform_device_id sh_pfc_id_table[] = {
1373 #ifdef CONFIG_PINCTRL_PFC_SH7203
1374 { "pfc-sh7203", (kernel_ulong_t)&sh7203_pinmux_info },
1375 #endif
1376 #ifdef CONFIG_PINCTRL_PFC_SH7264
1377 { "pfc-sh7264", (kernel_ulong_t)&sh7264_pinmux_info },
1378 #endif
1379 #ifdef CONFIG_PINCTRL_PFC_SH7269
1380 { "pfc-sh7269", (kernel_ulong_t)&sh7269_pinmux_info },
1381 #endif
1382 #ifdef CONFIG_PINCTRL_PFC_SH7720
1383 { "pfc-sh7720", (kernel_ulong_t)&sh7720_pinmux_info },
1384 #endif
1385 #ifdef CONFIG_PINCTRL_PFC_SH7722
1386 { "pfc-sh7722", (kernel_ulong_t)&sh7722_pinmux_info },
1387 #endif
1388 #ifdef CONFIG_PINCTRL_PFC_SH7723
1389 { "pfc-sh7723", (kernel_ulong_t)&sh7723_pinmux_info },
1390 #endif
1391 #ifdef CONFIG_PINCTRL_PFC_SH7724
1392 { "pfc-sh7724", (kernel_ulong_t)&sh7724_pinmux_info },
1393 #endif
1394 #ifdef CONFIG_PINCTRL_PFC_SH7734
1395 { "pfc-sh7734", (kernel_ulong_t)&sh7734_pinmux_info },
1396 #endif
1397 #ifdef CONFIG_PINCTRL_PFC_SH7757
1398 { "pfc-sh7757", (kernel_ulong_t)&sh7757_pinmux_info },
1399 #endif
1400 #ifdef CONFIG_PINCTRL_PFC_SH7785
1401 { "pfc-sh7785", (kernel_ulong_t)&sh7785_pinmux_info },
1402 #endif
1403 #ifdef CONFIG_PINCTRL_PFC_SH7786
1404 { "pfc-sh7786", (kernel_ulong_t)&sh7786_pinmux_info },
1405 #endif
1406 #ifdef CONFIG_PINCTRL_PFC_SHX3
1407 { "pfc-shx3", (kernel_ulong_t)&shx3_pinmux_info },
1408 #endif
1409 { /* sentinel */ }
1410 };
1411
1412 static struct platform_driver sh_pfc_driver = {
1413 .probe = sh_pfc_probe,
1414 .id_table = sh_pfc_id_table,
1415 .driver = {
1416 .name = DRV_NAME,
1417 .of_match_table = of_match_ptr(sh_pfc_of_table),
1418 .pm = pm_sleep_ptr(&sh_pfc_pm),
1419 },
1420 };
1421
sh_pfc_init(void)1422 static int __init sh_pfc_init(void)
1423 {
1424 sh_pfc_check_driver(&sh_pfc_driver);
1425 return platform_driver_register(&sh_pfc_driver);
1426 }
1427 postcore_initcall(sh_pfc_init);
1428
