summaryrefslogtreecommitdiff
path: root/drivers/pinctrl/bcm/pinctrl-bcm6362.c
blob: 13c7230949b2bc042e250d0467ec3e09556f7146 (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
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
// SPDX-License-Identifier: GPL-2.0+
/*
 * Driver for BCM6362 GPIO unit (pinctrl + GPIO)
 *
 * Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>
 * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
 */

#include <linux/bits.h>
#include <linux/gpio/driver.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#include "../pinctrl-utils.h"

#include "pinctrl-bcm63xx.h"

#define BCM6362_BANK_GPIOS	32
#define BCM6362_NUM_GPIOS	48
#define BCM6362_NUM_LEDS	24

#define BCM6362_LED_REG		0x10
#define BCM6362_MODE_REG	0x18
#define BCM6362_CTRL_REG	0x1c
#define BCM6362_BASEMODE_REG	0x38
#define  BASEMODE_NAND		BIT(2)

enum bcm6362_pinctrl_reg {
	BCM6362_LEDCTRL,
	BCM6362_MODE,
	BCM6362_CTRL,
	BCM6362_BASEMODE,
};

struct bcm6362_pingroup {
	const char *name;
	const unsigned * const pins;
	const unsigned num_pins;
};

struct bcm6362_function {
	const char *name;
	const char * const *groups;
	const unsigned num_groups;

	enum bcm6362_pinctrl_reg reg;
	uint32_t basemode_mask;
};

#define BCM6362_PIN(a, b, mask)			\
	{					\
		.number = a,			\
		.name = b,			\
		.drv_data = (void *)(mask),	\
	}

static const struct pinctrl_pin_desc bcm6362_pins[] = {
	PINCTRL_PIN(0, "gpio0"),
	PINCTRL_PIN(1, "gpio1"),
	PINCTRL_PIN(2, "gpio2"),
	PINCTRL_PIN(3, "gpio3"),
	PINCTRL_PIN(4, "gpio4"),
	PINCTRL_PIN(5, "gpio5"),
	PINCTRL_PIN(6, "gpio6"),
	PINCTRL_PIN(7, "gpio7"),
	BCM6362_PIN(8, "gpio8", BASEMODE_NAND),
	PINCTRL_PIN(9, "gpio9"),
	PINCTRL_PIN(10, "gpio10"),
	PINCTRL_PIN(11, "gpio11"),
	BCM6362_PIN(12, "gpio12", BASEMODE_NAND),
	BCM6362_PIN(13, "gpio13", BASEMODE_NAND),
	BCM6362_PIN(14, "gpio14", BASEMODE_NAND),
	BCM6362_PIN(15, "gpio15", BASEMODE_NAND),
	BCM6362_PIN(16, "gpio16", BASEMODE_NAND),
	BCM6362_PIN(17, "gpio17", BASEMODE_NAND),
	BCM6362_PIN(18, "gpio18", BASEMODE_NAND),
	BCM6362_PIN(19, "gpio19", BASEMODE_NAND),
	BCM6362_PIN(20, "gpio20", BASEMODE_NAND),
	BCM6362_PIN(21, "gpio21", BASEMODE_NAND),
	BCM6362_PIN(22, "gpio22", BASEMODE_NAND),
	BCM6362_PIN(23, "gpio23", BASEMODE_NAND),
	PINCTRL_PIN(24, "gpio24"),
	PINCTRL_PIN(25, "gpio25"),
	PINCTRL_PIN(26, "gpio26"),
	BCM6362_PIN(27, "gpio27", BASEMODE_NAND),
	PINCTRL_PIN(28, "gpio28"),
	PINCTRL_PIN(29, "gpio29"),
	PINCTRL_PIN(30, "gpio30"),
	PINCTRL_PIN(31, "gpio31"),
	PINCTRL_PIN(32, "gpio32"),
	PINCTRL_PIN(33, "gpio33"),
	PINCTRL_PIN(34, "gpio34"),
	PINCTRL_PIN(35, "gpio35"),
	PINCTRL_PIN(36, "gpio36"),
	PINCTRL_PIN(37, "gpio37"),
	PINCTRL_PIN(38, "gpio38"),
	PINCTRL_PIN(39, "gpio39"),
	PINCTRL_PIN(40, "gpio40"),
	PINCTRL_PIN(41, "gpio41"),
	PINCTRL_PIN(42, "gpio42"),
	PINCTRL_PIN(43, "gpio43"),
	PINCTRL_PIN(44, "gpio44"),
	PINCTRL_PIN(45, "gpio45"),
	PINCTRL_PIN(46, "gpio46"),
	PINCTRL_PIN(47, "gpio47"),
};

static unsigned gpio0_pins[] = { 0 };
static unsigned gpio1_pins[] = { 1 };
static unsigned gpio2_pins[] = { 2 };
static unsigned gpio3_pins[] = { 3 };
static unsigned gpio4_pins[] = { 4 };
static unsigned gpio5_pins[] = { 5 };
static unsigned gpio6_pins[] = { 6 };
static unsigned gpio7_pins[] = { 7 };
static unsigned gpio8_pins[] = { 8 };
static unsigned gpio9_pins[] = { 9 };
static unsigned gpio10_pins[] = { 10 };
static unsigned gpio11_pins[] = { 11 };
static unsigned gpio12_pins[] = { 12 };
static unsigned gpio13_pins[] = { 13 };
static unsigned gpio14_pins[] = { 14 };
static unsigned gpio15_pins[] = { 15 };
static unsigned gpio16_pins[] = { 16 };
static unsigned gpio17_pins[] = { 17 };
static unsigned gpio18_pins[] = { 18 };
static unsigned gpio19_pins[] = { 19 };
static unsigned gpio20_pins[] = { 20 };
static unsigned gpio21_pins[] = { 21 };
static unsigned gpio22_pins[] = { 22 };
static unsigned gpio23_pins[] = { 23 };
static unsigned gpio24_pins[] = { 24 };
static unsigned gpio25_pins[] = { 25 };
static unsigned gpio26_pins[] = { 26 };
static unsigned gpio27_pins[] = { 27 };
static unsigned gpio28_pins[] = { 28 };
static unsigned gpio29_pins[] = { 29 };
static unsigned gpio30_pins[] = { 30 };
static unsigned gpio31_pins[] = { 31 };
static unsigned gpio32_pins[] = { 32 };
static unsigned gpio33_pins[] = { 33 };
static unsigned gpio34_pins[] = { 34 };
static unsigned gpio35_pins[] = { 35 };
static unsigned gpio36_pins[] = { 36 };
static unsigned gpio37_pins[] = { 37 };
static unsigned gpio38_pins[] = { 38 };
static unsigned gpio39_pins[] = { 39 };
static unsigned gpio40_pins[] = { 40 };
static unsigned gpio41_pins[] = { 41 };
static unsigned gpio42_pins[] = { 42 };
static unsigned gpio43_pins[] = { 43 };
static unsigned gpio44_pins[] = { 44 };
static unsigned gpio45_pins[] = { 45 };
static unsigned gpio46_pins[] = { 46 };
static unsigned gpio47_pins[] = { 47 };

static unsigned nand_grp_pins[] = {
	8, 12, 13, 14, 15, 16, 17,
	18, 19, 20, 21, 22, 23, 27,
};

#define BCM6362_GROUP(n)				\
	{						\
		.name = #n,				\
		.pins = n##_pins,			\
		.num_pins = ARRAY_SIZE(n##_pins),	\
	}

static struct bcm6362_pingroup bcm6362_groups[] = {
	BCM6362_GROUP(gpio0),
	BCM6362_GROUP(gpio1),
	BCM6362_GROUP(gpio2),
	BCM6362_GROUP(gpio3),
	BCM6362_GROUP(gpio4),
	BCM6362_GROUP(gpio5),
	BCM6362_GROUP(gpio6),
	BCM6362_GROUP(gpio7),
	BCM6362_GROUP(gpio8),
	BCM6362_GROUP(gpio9),
	BCM6362_GROUP(gpio10),
	BCM6362_GROUP(gpio11),
	BCM6362_GROUP(gpio12),
	BCM6362_GROUP(gpio13),
	BCM6362_GROUP(gpio14),
	BCM6362_GROUP(gpio15),
	BCM6362_GROUP(gpio16),
	BCM6362_GROUP(gpio17),
	BCM6362_GROUP(gpio18),
	BCM6362_GROUP(gpio19),
	BCM6362_GROUP(gpio20),
	BCM6362_GROUP(gpio21),
	BCM6362_GROUP(gpio22),
	BCM6362_GROUP(gpio23),
	BCM6362_GROUP(gpio24),
	BCM6362_GROUP(gpio25),
	BCM6362_GROUP(gpio26),
	BCM6362_GROUP(gpio27),
	BCM6362_GROUP(gpio28),
	BCM6362_GROUP(gpio29),
	BCM6362_GROUP(gpio30),
	BCM6362_GROUP(gpio31),
	BCM6362_GROUP(gpio32),
	BCM6362_GROUP(gpio33),
	BCM6362_GROUP(gpio34),
	BCM6362_GROUP(gpio35),
	BCM6362_GROUP(gpio36),
	BCM6362_GROUP(gpio37),
	BCM6362_GROUP(gpio38),
	BCM6362_GROUP(gpio39),
	BCM6362_GROUP(gpio40),
	BCM6362_GROUP(gpio41),
	BCM6362_GROUP(gpio42),
	BCM6362_GROUP(gpio43),
	BCM6362_GROUP(gpio44),
	BCM6362_GROUP(gpio45),
	BCM6362_GROUP(gpio46),
	BCM6362_GROUP(gpio47),
	BCM6362_GROUP(nand_grp),
};

static const char * const led_groups[] = {
	"gpio0",
	"gpio1",
	"gpio2",
	"gpio3",
	"gpio4",
	"gpio5",
	"gpio6",
	"gpio7",
	"gpio8",
	"gpio9",
	"gpio10",
	"gpio11",
	"gpio12",
	"gpio13",
	"gpio14",
	"gpio15",
	"gpio16",
	"gpio17",
	"gpio18",
	"gpio19",
	"gpio20",
	"gpio21",
	"gpio22",
	"gpio23",
};

static const char * const usb_device_led_groups[] = {
	"gpio0",
};

static const char * const sys_irq_groups[] = {
	"gpio1",
};

static const char * const serial_led_clk_groups[] = {
	"gpio2",
};

static const char * const serial_led_data_groups[] = {
	"gpio3",
};

static const char * const robosw_led_data_groups[] = {
	"gpio4",
};

static const char * const robosw_led_clk_groups[] = {
	"gpio5",
};

static const char * const robosw_led0_groups[] = {
	"gpio6",
};

static const char * const robosw_led1_groups[] = {
	"gpio7",
};

static const char * const inet_led_groups[] = {
	"gpio8",
};

static const char * const spi_cs2_groups[] = {
	"gpio9",
};

static const char * const spi_cs3_groups[] = {
	"gpio10",
};

static const char * const ntr_pulse_groups[] = {
	"gpio11",
};

static const char * const uart1_scts_groups[] = {
	"gpio12",
};

static const char * const uart1_srts_groups[] = {
	"gpio13",
};

static const char * const uart1_sdin_groups[] = {
	"gpio14",
};

static const char * const uart1_sdout_groups[] = {
	"gpio15",
};

static const char * const adsl_spi_miso_groups[] = {
	"gpio16",
};

static const char * const adsl_spi_mosi_groups[] = {
	"gpio17",
};

static const char * const adsl_spi_clk_groups[] = {
	"gpio18",
};

static const char * const adsl_spi_cs_groups[] = {
	"gpio19",
};

static const char * const ephy0_led_groups[] = {
	"gpio20",
};

static const char * const ephy1_led_groups[] = {
	"gpio21",
};

static const char * const ephy2_led_groups[] = {
	"gpio22",
};

static const char * const ephy3_led_groups[] = {
	"gpio23",
};

static const char * const ext_irq0_groups[] = {
	"gpio24",
};

static const char * const ext_irq1_groups[] = {
	"gpio25",
};

static const char * const ext_irq2_groups[] = {
	"gpio26",
};

static const char * const ext_irq3_groups[] = {
	"gpio27",
};

static const char * const wifi_groups[] = {
	"gpio32",
	"gpio33",
	"gpio34",
	"gpio35",
	"gpio36",
	"gpio37",
	"gpio38",
	"gpio39",
	"gpio40",
	"gpio41",
	"gpio42",
	"gpio43",
	"gpio44",
	"gpio45",
	"gpio46",
	"gpio47",
};

static const char * const nand_groups[] = {
	"nand_grp",
};

#define BCM6362_LED_FUN(n)				\
	{						\
		.name = #n,				\
		.groups = n##_groups,			\
		.num_groups = ARRAY_SIZE(n##_groups),	\
		.reg = BCM6362_LEDCTRL,			\
	}

#define BCM6362_MODE_FUN(n)				\
	{						\
		.name = #n,				\
		.groups = n##_groups,			\
		.num_groups = ARRAY_SIZE(n##_groups),	\
		.reg = BCM6362_MODE,			\
	}

#define BCM6362_CTRL_FUN(n)				\
	{						\
		.name = #n,				\
		.groups = n##_groups,			\
		.num_groups = ARRAY_SIZE(n##_groups),	\
		.reg = BCM6362_CTRL,			\
	}

#define BCM6362_BASEMODE_FUN(n, mask)			\
	{						\
		.name = #n,				\
		.groups = n##_groups,			\
		.num_groups = ARRAY_SIZE(n##_groups),	\
		.reg = BCM6362_BASEMODE,		\
		.basemode_mask = (mask),		\
	}

static const struct bcm6362_function bcm6362_funcs[] = {
	BCM6362_LED_FUN(led),
	BCM6362_MODE_FUN(usb_device_led),
	BCM6362_MODE_FUN(sys_irq),
	BCM6362_MODE_FUN(serial_led_clk),
	BCM6362_MODE_FUN(serial_led_data),
	BCM6362_MODE_FUN(robosw_led_data),
	BCM6362_MODE_FUN(robosw_led_clk),
	BCM6362_MODE_FUN(robosw_led0),
	BCM6362_MODE_FUN(robosw_led1),
	BCM6362_MODE_FUN(inet_led),
	BCM6362_MODE_FUN(spi_cs2),
	BCM6362_MODE_FUN(spi_cs3),
	BCM6362_MODE_FUN(ntr_pulse),
	BCM6362_MODE_FUN(uart1_scts),
	BCM6362_MODE_FUN(uart1_srts),
	BCM6362_MODE_FUN(uart1_sdin),
	BCM6362_MODE_FUN(uart1_sdout),
	BCM6362_MODE_FUN(adsl_spi_miso),
	BCM6362_MODE_FUN(adsl_spi_mosi),
	BCM6362_MODE_FUN(adsl_spi_clk),
	BCM6362_MODE_FUN(adsl_spi_cs),
	BCM6362_MODE_FUN(ephy0_led),
	BCM6362_MODE_FUN(ephy1_led),
	BCM6362_MODE_FUN(ephy2_led),
	BCM6362_MODE_FUN(ephy3_led),
	BCM6362_MODE_FUN(ext_irq0),
	BCM6362_MODE_FUN(ext_irq1),
	BCM6362_MODE_FUN(ext_irq2),
	BCM6362_MODE_FUN(ext_irq3),
	BCM6362_CTRL_FUN(wifi),
	BCM6362_BASEMODE_FUN(nand, BASEMODE_NAND),
};

static int bcm6362_pinctrl_get_group_count(struct pinctrl_dev *pctldev)
{
	return ARRAY_SIZE(bcm6362_groups);
}

static const char *bcm6362_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
						  unsigned group)
{
	return bcm6362_groups[group].name;
}

static int bcm6362_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
					  unsigned group, const unsigned **pins,
					  unsigned *num_pins)
{
	*pins = bcm6362_groups[group].pins;
	*num_pins = bcm6362_groups[group].num_pins;

	return 0;
}

static int bcm6362_pinctrl_get_func_count(struct pinctrl_dev *pctldev)
{
	return ARRAY_SIZE(bcm6362_funcs);
}

static const char *bcm6362_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
						 unsigned selector)
{
	return bcm6362_funcs[selector].name;
}

static int bcm6362_pinctrl_get_groups(struct pinctrl_dev *pctldev,
				      unsigned selector,
				      const char * const **groups,
				      unsigned * const num_groups)
{
	*groups = bcm6362_funcs[selector].groups;
	*num_groups = bcm6362_funcs[selector].num_groups;

	return 0;
}

static void bcm6362_set_gpio(struct bcm63xx_pinctrl *pc, unsigned pin)
{
	const struct pinctrl_pin_desc *desc = &bcm6362_pins[pin];
	unsigned int basemode = (uintptr_t)desc->drv_data;
	unsigned int mask = bcm63xx_bank_pin(pin);

	if (basemode)
		regmap_update_bits(pc->regs, BCM6362_BASEMODE_REG, basemode, 0);

	if (pin < BCM63XX_BANK_GPIOS) {
		/* base mode 0 => gpio 1 => mux function */
		regmap_update_bits(pc->regs, BCM6362_MODE_REG, mask, 0);

		/* pins 0-23 might be muxed to led */
		if (pin < BCM6362_NUM_LEDS)
			regmap_update_bits(pc->regs, BCM6362_LED_REG, mask, 0);
	} else {
		/* ctrl reg 0 => wifi function 1 => gpio */
		regmap_update_bits(pc->regs, BCM6362_CTRL_REG, mask, mask);
	}
}

static int bcm6362_pinctrl_set_mux(struct pinctrl_dev *pctldev,
				   unsigned selector, unsigned group)
{
	struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
	const struct bcm6362_pingroup *pg = &bcm6362_groups[group];
	const struct bcm6362_function *f = &bcm6362_funcs[selector];
	unsigned i;
	unsigned int reg;
	unsigned int val, mask;

	for (i = 0; i < pg->num_pins; i++)
		bcm6362_set_gpio(pc, pg->pins[i]);

	switch (f->reg) {
	case BCM6362_LEDCTRL:
		reg = BCM6362_LED_REG;
		mask = BIT(pg->pins[0]);
		val = BIT(pg->pins[0]);
		break;
	case BCM6362_MODE:
		reg = BCM6362_MODE_REG;
		mask = BIT(pg->pins[0]);
		val = BIT(pg->pins[0]);
		break;
	case BCM6362_CTRL:
		reg = BCM6362_CTRL_REG;
		mask = BIT(pg->pins[0]);
		val = 0;
		break;
	case BCM6362_BASEMODE:
		reg = BCM6362_BASEMODE_REG;
		mask = f->basemode_mask;
		val = f->basemode_mask;
		break;
	default:
		WARN_ON(1);
		return -EINVAL;
	}

	regmap_update_bits(pc->regs, reg, mask, val);

	return 0;
}

static int bcm6362_gpio_request_enable(struct pinctrl_dev *pctldev,
				       struct pinctrl_gpio_range *range,
				       unsigned offset)
{
	struct bcm63xx_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);

	/* disable all functions using this pin */
	bcm6362_set_gpio(pc, offset);

	return 0;
}

static const struct pinctrl_ops bcm6362_pctl_ops = {
	.dt_free_map = pinctrl_utils_free_map,
	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
	.get_group_name = bcm6362_pinctrl_get_group_name,
	.get_group_pins = bcm6362_pinctrl_get_group_pins,
	.get_groups_count = bcm6362_pinctrl_get_group_count,
};

static const struct pinmux_ops bcm6362_pmx_ops = {
	.get_function_groups = bcm6362_pinctrl_get_groups,
	.get_function_name = bcm6362_pinctrl_get_func_name,
	.get_functions_count = bcm6362_pinctrl_get_func_count,
	.gpio_request_enable = bcm6362_gpio_request_enable,
	.set_mux = bcm6362_pinctrl_set_mux,
	.strict = true,
};

static const struct bcm63xx_pinctrl_soc bcm6362_soc = {
	.ngpios = BCM6362_NUM_GPIOS,
	.npins = ARRAY_SIZE(bcm6362_pins),
	.pctl_ops = &bcm6362_pctl_ops,
	.pins = bcm6362_pins,
	.pmx_ops = &bcm6362_pmx_ops,
};

static int bcm6362_pinctrl_probe(struct platform_device *pdev)
{
	return bcm63xx_pinctrl_probe(pdev, &bcm6362_soc, NULL);
}

static const struct of_device_id bcm6362_pinctrl_match[] = {
	{ .compatible = "brcm,bcm6362-pinctrl", },
	{ /* sentinel */ }
};

static struct platform_driver bcm6362_pinctrl_driver = {
	.probe = bcm6362_pinctrl_probe,
	.driver = {
		.name = "bcm6362-pinctrl",
		.of_match_table = bcm6362_pinctrl_match,
	},
};

builtin_platform_driver(bcm6362_pinctrl_driver);