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mt76: avoid rx reorder buffer overflow
[linux/fpc-iii.git] / drivers / pinctrl / pinctrl-ocelot.c
blobed8eac6c14944c9616d9133ab59dc21451443a22
1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /*
3 * Microsemi SoCs pinctrl driver
4 *
5 * Author: <alexandre.belloni@free-electrons.com>
6 * License: Dual MIT/GPL
7 * Copyright (c) 2017 Microsemi Corporation
8 */
9
10 #include <linux/gpio/driver.h>
11 #include <linux/interrupt.h>
12 #include <linux/io.h>
13 #include <linux/of_device.h>
14 #include <linux/of_irq.h>
15 #include <linux/of_platform.h>
16 #include <linux/pinctrl/pinctrl.h>
17 #include <linux/pinctrl/pinmux.h>
18 #include <linux/pinctrl/pinconf.h>
19 #include <linux/pinctrl/pinconf-generic.h>
20 #include <linux/platform_device.h>
21 #include <linux/regmap.h>
22 #include <linux/slab.h>
23
24 #include "core.h"
25 #include "pinconf.h"
26 #include "pinmux.h"
27
28 #define OCELOT_GPIO_OUT_SET 0x0
29 #define OCELOT_GPIO_OUT_CLR 0x4
30 #define OCELOT_GPIO_OUT 0x8
31 #define OCELOT_GPIO_IN 0xc
32 #define OCELOT_GPIO_OE 0x10
33 #define OCELOT_GPIO_INTR 0x14
34 #define OCELOT_GPIO_INTR_ENA 0x18
35 #define OCELOT_GPIO_INTR_IDENT 0x1c
36 #define OCELOT_GPIO_ALT0 0x20
37 #define OCELOT_GPIO_ALT1 0x24
38 #define OCELOT_GPIO_SD_MAP 0x28
39
40 #define OCELOT_FUNC_PER_PIN 4
41
42 enum {
43 FUNC_NONE,
44 FUNC_GPIO,
45 FUNC_IRQ0_IN,
46 FUNC_IRQ0_OUT,
47 FUNC_IRQ1_IN,
48 FUNC_IRQ1_OUT,
49 FUNC_MIIM1,
50 FUNC_MIIM2,
51 FUNC_PCI_WAKE,
52 FUNC_PTP0,
53 FUNC_PTP1,
54 FUNC_PTP2,
55 FUNC_PTP3,
56 FUNC_PWM,
57 FUNC_RECO_CLK0,
58 FUNC_RECO_CLK1,
59 FUNC_SFP0,
60 FUNC_SFP1,
61 FUNC_SFP2,
62 FUNC_SFP3,
63 FUNC_SFP4,
64 FUNC_SFP5,
65 FUNC_SFP6,
66 FUNC_SFP7,
67 FUNC_SFP8,
68 FUNC_SFP9,
69 FUNC_SFP10,
70 FUNC_SFP11,
71 FUNC_SFP12,
72 FUNC_SFP13,
73 FUNC_SFP14,
74 FUNC_SFP15,
75 FUNC_SG0,
76 FUNC_SG1,
77 FUNC_SG2,
78 FUNC_SI,
79 FUNC_TACHO,
80 FUNC_TWI,
81 FUNC_TWI2,
82 FUNC_TWI_SCL_M,
83 FUNC_UART,
84 FUNC_UART2,
85 FUNC_MAX
86 };
87
88 static const char *const ocelot_function_names[] = {
89 [FUNC_NONE] = "none",
90 [FUNC_GPIO] = "gpio",
91 [FUNC_IRQ0_IN] = "irq0_in",
92 [FUNC_IRQ0_OUT] = "irq0_out",
93 [FUNC_IRQ1_IN] = "irq1_in",
94 [FUNC_IRQ1_OUT] = "irq1_out",
95 [FUNC_MIIM1] = "miim1",
96 [FUNC_MIIM2] = "miim2",
97 [FUNC_PCI_WAKE] = "pci_wake",
98 [FUNC_PTP0] = "ptp0",
99 [FUNC_PTP1] = "ptp1",
100 [FUNC_PTP2] = "ptp2",
101 [FUNC_PTP3] = "ptp3",
102 [FUNC_PWM] = "pwm",
103 [FUNC_RECO_CLK0] = "reco_clk0",
104 [FUNC_RECO_CLK1] = "reco_clk1",
105 [FUNC_SFP0] = "sfp0",
106 [FUNC_SFP1] = "sfp1",
107 [FUNC_SFP2] = "sfp2",
108 [FUNC_SFP3] = "sfp3",
109 [FUNC_SFP4] = "sfp4",
110 [FUNC_SFP5] = "sfp5",
111 [FUNC_SFP6] = "sfp6",
112 [FUNC_SFP7] = "sfp7",
113 [FUNC_SFP8] = "sfp8",
114 [FUNC_SFP9] = "sfp9",
115 [FUNC_SFP10] = "sfp10",
116 [FUNC_SFP11] = "sfp11",
117 [FUNC_SFP12] = "sfp12",
118 [FUNC_SFP13] = "sfp13",
119 [FUNC_SFP14] = "sfp14",
120 [FUNC_SFP15] = "sfp15",
121 [FUNC_SG0] = "sg0",
122 [FUNC_SG1] = "sg1",
123 [FUNC_SG2] = "sg2",
124 [FUNC_SI] = "si",
125 [FUNC_TACHO] = "tacho",
126 [FUNC_TWI] = "twi",
127 [FUNC_TWI2] = "twi2",
128 [FUNC_TWI_SCL_M] = "twi_scl_m",
129 [FUNC_UART] = "uart",
130 [FUNC_UART2] = "uart2",
131 };
132
133 struct ocelot_pmx_func {
134 const char **groups;
135 unsigned int ngroups;
136 };
137
138 struct ocelot_pin_caps {
139 unsigned int pin;
140 unsigned char functions[OCELOT_FUNC_PER_PIN];
141 };
142
143 struct ocelot_pinctrl {
144 struct device *dev;
145 struct pinctrl_dev *pctl;
146 struct gpio_chip gpio_chip;
147 struct regmap *map;
148 struct pinctrl_desc *desc;
149 struct ocelot_pmx_func func[FUNC_MAX];
150 u8 stride;
151 };
152
153 #define OCELOT_P(p, f0, f1, f2) \
154 static struct ocelot_pin_caps ocelot_pin_##p = { \
155 .pin = p, \
156 .functions = { \
157 FUNC_GPIO, FUNC_##f0, FUNC_##f1, FUNC_##f2, \
158 }, \
159 }
160
161 OCELOT_P(0, SG0, NONE, NONE);
162 OCELOT_P(1, SG0, NONE, NONE);
163 OCELOT_P(2, SG0, NONE, NONE);
164 OCELOT_P(3, SG0, NONE, NONE);
165 OCELOT_P(4, IRQ0_IN, IRQ0_OUT, TWI_SCL_M);
166 OCELOT_P(5, IRQ1_IN, IRQ1_OUT, PCI_WAKE);
167 OCELOT_P(6, UART, TWI_SCL_M, NONE);
168 OCELOT_P(7, UART, TWI_SCL_M, NONE);
169 OCELOT_P(8, SI, TWI_SCL_M, IRQ0_OUT);
170 OCELOT_P(9, SI, TWI_SCL_M, IRQ1_OUT);
171 OCELOT_P(10, PTP2, TWI_SCL_M, SFP0);
172 OCELOT_P(11, PTP3, TWI_SCL_M, SFP1);
173 OCELOT_P(12, UART2, TWI_SCL_M, SFP2);
174 OCELOT_P(13, UART2, TWI_SCL_M, SFP3);
175 OCELOT_P(14, MIIM1, TWI_SCL_M, SFP4);
176 OCELOT_P(15, MIIM1, TWI_SCL_M, SFP5);
177 OCELOT_P(16, TWI, NONE, SI);
178 OCELOT_P(17, TWI, TWI_SCL_M, SI);
179 OCELOT_P(18, PTP0, TWI_SCL_M, NONE);
180 OCELOT_P(19, PTP1, TWI_SCL_M, NONE);
181 OCELOT_P(20, RECO_CLK0, TACHO, NONE);
182 OCELOT_P(21, RECO_CLK1, PWM, NONE);
183
184 #define OCELOT_PIN(n) { \
185 .number = n, \
186 .name = "GPIO_"#n, \
187 .drv_data = &ocelot_pin_##n \
188 }
189
190 static const struct pinctrl_pin_desc ocelot_pins[] = {
191 OCELOT_PIN(0),
192 OCELOT_PIN(1),
193 OCELOT_PIN(2),
194 OCELOT_PIN(3),
195 OCELOT_PIN(4),
196 OCELOT_PIN(5),
197 OCELOT_PIN(6),
198 OCELOT_PIN(7),
199 OCELOT_PIN(8),
200 OCELOT_PIN(9),
201 OCELOT_PIN(10),
202 OCELOT_PIN(11),
203 OCELOT_PIN(12),
204 OCELOT_PIN(13),
205 OCELOT_PIN(14),
206 OCELOT_PIN(15),
207 OCELOT_PIN(16),
208 OCELOT_PIN(17),
209 OCELOT_PIN(18),
210 OCELOT_PIN(19),
211 OCELOT_PIN(20),
212 OCELOT_PIN(21),
213 };
214
215 #define JAGUAR2_P(p, f0, f1) \
216 static struct ocelot_pin_caps jaguar2_pin_##p = { \
217 .pin = p, \
218 .functions = { \
219 FUNC_GPIO, FUNC_##f0, FUNC_##f1, FUNC_NONE \
220 }, \
221 }
222
223 JAGUAR2_P(0, SG0, NONE);
224 JAGUAR2_P(1, SG0, NONE);
225 JAGUAR2_P(2, SG0, NONE);
226 JAGUAR2_P(3, SG0, NONE);
227 JAGUAR2_P(4, SG1, NONE);
228 JAGUAR2_P(5, SG1, NONE);
229 JAGUAR2_P(6, IRQ0_IN, IRQ0_OUT);
230 JAGUAR2_P(7, IRQ1_IN, IRQ1_OUT);
231 JAGUAR2_P(8, PTP0, NONE);
232 JAGUAR2_P(9, PTP1, NONE);
233 JAGUAR2_P(10, UART, NONE);
234 JAGUAR2_P(11, UART, NONE);
235 JAGUAR2_P(12, SG1, NONE);
236 JAGUAR2_P(13, SG1, NONE);
237 JAGUAR2_P(14, TWI, TWI_SCL_M);
238 JAGUAR2_P(15, TWI, NONE);
239 JAGUAR2_P(16, SI, TWI_SCL_M);
240 JAGUAR2_P(17, SI, TWI_SCL_M);
241 JAGUAR2_P(18, SI, TWI_SCL_M);
242 JAGUAR2_P(19, PCI_WAKE, NONE);
243 JAGUAR2_P(20, IRQ0_OUT, TWI_SCL_M);
244 JAGUAR2_P(21, IRQ1_OUT, TWI_SCL_M);
245 JAGUAR2_P(22, TACHO, NONE);
246 JAGUAR2_P(23, PWM, NONE);
247 JAGUAR2_P(24, UART2, NONE);
248 JAGUAR2_P(25, UART2, SI);
249 JAGUAR2_P(26, PTP2, SI);
250 JAGUAR2_P(27, PTP3, SI);
251 JAGUAR2_P(28, TWI2, SI);
252 JAGUAR2_P(29, TWI2, SI);
253 JAGUAR2_P(30, SG2, SI);
254 JAGUAR2_P(31, SG2, SI);
255 JAGUAR2_P(32, SG2, SI);
256 JAGUAR2_P(33, SG2, SI);
257 JAGUAR2_P(34, NONE, TWI_SCL_M);
258 JAGUAR2_P(35, NONE, TWI_SCL_M);
259 JAGUAR2_P(36, NONE, TWI_SCL_M);
260 JAGUAR2_P(37, NONE, TWI_SCL_M);
261 JAGUAR2_P(38, NONE, TWI_SCL_M);
262 JAGUAR2_P(39, NONE, TWI_SCL_M);
263 JAGUAR2_P(40, NONE, TWI_SCL_M);
264 JAGUAR2_P(41, NONE, TWI_SCL_M);
265 JAGUAR2_P(42, NONE, TWI_SCL_M);
266 JAGUAR2_P(43, NONE, TWI_SCL_M);
267 JAGUAR2_P(44, NONE, SFP8);
268 JAGUAR2_P(45, NONE, SFP9);
269 JAGUAR2_P(46, NONE, SFP10);
270 JAGUAR2_P(47, NONE, SFP11);
271 JAGUAR2_P(48, SFP0, NONE);
272 JAGUAR2_P(49, SFP1, SI);
273 JAGUAR2_P(50, SFP2, SI);
274 JAGUAR2_P(51, SFP3, SI);
275 JAGUAR2_P(52, SFP4, NONE);
276 JAGUAR2_P(53, SFP5, NONE);
277 JAGUAR2_P(54, SFP6, NONE);
278 JAGUAR2_P(55, SFP7, NONE);
279 JAGUAR2_P(56, MIIM1, SFP12);
280 JAGUAR2_P(57, MIIM1, SFP13);
281 JAGUAR2_P(58, MIIM2, SFP14);
282 JAGUAR2_P(59, MIIM2, SFP15);
283 JAGUAR2_P(60, NONE, NONE);
284 JAGUAR2_P(61, NONE, NONE);
285 JAGUAR2_P(62, NONE, NONE);
286 JAGUAR2_P(63, NONE, NONE);
287
288 #define JAGUAR2_PIN(n) { \
289 .number = n, \
290 .name = "GPIO_"#n, \
291 .drv_data = &jaguar2_pin_##n \
292 }
293
294 static const struct pinctrl_pin_desc jaguar2_pins[] = {
295 JAGUAR2_PIN(0),
296 JAGUAR2_PIN(1),
297 JAGUAR2_PIN(2),
298 JAGUAR2_PIN(3),
299 JAGUAR2_PIN(4),
300 JAGUAR2_PIN(5),
301 JAGUAR2_PIN(6),
302 JAGUAR2_PIN(7),
303 JAGUAR2_PIN(8),
304 JAGUAR2_PIN(9),
305 JAGUAR2_PIN(10),
306 JAGUAR2_PIN(11),
307 JAGUAR2_PIN(12),
308 JAGUAR2_PIN(13),
309 JAGUAR2_PIN(14),
310 JAGUAR2_PIN(15),
311 JAGUAR2_PIN(16),
312 JAGUAR2_PIN(17),
313 JAGUAR2_PIN(18),
314 JAGUAR2_PIN(19),
315 JAGUAR2_PIN(20),
316 JAGUAR2_PIN(21),
317 JAGUAR2_PIN(22),
318 JAGUAR2_PIN(23),
319 JAGUAR2_PIN(24),
320 JAGUAR2_PIN(25),
321 JAGUAR2_PIN(26),
322 JAGUAR2_PIN(27),
323 JAGUAR2_PIN(28),
324 JAGUAR2_PIN(29),
325 JAGUAR2_PIN(30),
326 JAGUAR2_PIN(31),
327 JAGUAR2_PIN(32),
328 JAGUAR2_PIN(33),
329 JAGUAR2_PIN(34),
330 JAGUAR2_PIN(35),
331 JAGUAR2_PIN(36),
332 JAGUAR2_PIN(37),
333 JAGUAR2_PIN(38),
334 JAGUAR2_PIN(39),
335 JAGUAR2_PIN(40),
336 JAGUAR2_PIN(41),
337 JAGUAR2_PIN(42),
338 JAGUAR2_PIN(43),
339 JAGUAR2_PIN(44),
340 JAGUAR2_PIN(45),
341 JAGUAR2_PIN(46),
342 JAGUAR2_PIN(47),
343 JAGUAR2_PIN(48),
344 JAGUAR2_PIN(49),
345 JAGUAR2_PIN(50),
346 JAGUAR2_PIN(51),
347 JAGUAR2_PIN(52),
348 JAGUAR2_PIN(53),
349 JAGUAR2_PIN(54),
350 JAGUAR2_PIN(55),
351 JAGUAR2_PIN(56),
352 JAGUAR2_PIN(57),
353 JAGUAR2_PIN(58),
354 JAGUAR2_PIN(59),
355 JAGUAR2_PIN(60),
356 JAGUAR2_PIN(61),
357 JAGUAR2_PIN(62),
358 JAGUAR2_PIN(63),
359 };
360
361 static int ocelot_get_functions_count(struct pinctrl_dev *pctldev)
362 {
363 return ARRAY_SIZE(ocelot_function_names);
364 }
365
366 static const char *ocelot_get_function_name(struct pinctrl_dev *pctldev,
367 unsigned int function)
368 {
369 return ocelot_function_names[function];
370 }
371
372 static int ocelot_get_function_groups(struct pinctrl_dev *pctldev,
373 unsigned int function,
374 const char *const **groups,
375 unsigned *const num_groups)
376 {
377 struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
378
379 *groups = info->func[function].groups;
380 *num_groups = info->func[function].ngroups;
381
382 return 0;
383 }
384
385 static int ocelot_pin_function_idx(struct ocelot_pinctrl *info,
386 unsigned int pin, unsigned int function)
387 {
388 struct ocelot_pin_caps *p = info->desc->pins[pin].drv_data;
389 int i;
390
391 for (i = 0; i < OCELOT_FUNC_PER_PIN; i++) {
392 if (function == p->functions[i])
393 return i;
394 }
395
396 return -1;
397 }
398
399 #define REG_ALT(msb, info, p) (OCELOT_GPIO_ALT0 * (info)->stride + 4 * ((msb) + ((info)->stride * ((p) / 32))))
400
401 static int ocelot_pinmux_set_mux(struct pinctrl_dev *pctldev,
402 unsigned int selector, unsigned int group)
403 {
404 struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
405 struct ocelot_pin_caps *pin = info->desc->pins[group].drv_data;
406 unsigned int p = pin->pin % 32;
407 int f;
408
409 f = ocelot_pin_function_idx(info, group, selector);
410 if (f < 0)
411 return -EINVAL;
412
413 /*
414 * f is encoded on two bits.
415 * bit 0 of f goes in BIT(pin) of ALT[0], bit 1 of f goes in BIT(pin) of
416 * ALT[1]
417 * This is racy because both registers can't be updated at the same time
418 * but it doesn't matter much for now.
419 */
420 regmap_update_bits(info->map, REG_ALT(0, info, pin->pin),
421 BIT(p), f << p);
422 regmap_update_bits(info->map, REG_ALT(1, info, pin->pin),
423 BIT(p), f << (p - 1));
424
425 return 0;
426 }
427
428 #define REG(r, info, p) ((r) * (info)->stride + (4 * ((p) / 32)))
429
430 static int ocelot_gpio_set_direction(struct pinctrl_dev *pctldev,
431 struct pinctrl_gpio_range *range,
432 unsigned int pin, bool input)
433 {
434 struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
435 unsigned int p = pin % 32;
436
437 regmap_update_bits(info->map, REG(OCELOT_GPIO_OE, info, pin), BIT(p),
438 input ? 0 : BIT(p));
439
440 return 0;
441 }
442
443 static int ocelot_gpio_request_enable(struct pinctrl_dev *pctldev,
444 struct pinctrl_gpio_range *range,
445 unsigned int offset)
446 {
447 struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
448 unsigned int p = offset % 32;
449
450 regmap_update_bits(info->map, REG_ALT(0, info, offset),
451 BIT(p), 0);
452 regmap_update_bits(info->map, REG_ALT(1, info, offset),
453 BIT(p), 0);
454
455 return 0;
456 }
457
458 static const struct pinmux_ops ocelot_pmx_ops = {
459 .get_functions_count = ocelot_get_functions_count,
460 .get_function_name = ocelot_get_function_name,
461 .get_function_groups = ocelot_get_function_groups,
462 .set_mux = ocelot_pinmux_set_mux,
463 .gpio_set_direction = ocelot_gpio_set_direction,
464 .gpio_request_enable = ocelot_gpio_request_enable,
465 };
466
467 static int ocelot_pctl_get_groups_count(struct pinctrl_dev *pctldev)
468 {
469 struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
470
471 return info->desc->npins;
472 }
473
474 static const char *ocelot_pctl_get_group_name(struct pinctrl_dev *pctldev,
475 unsigned int group)
476 {
477 struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
478
479 return info->desc->pins[group].name;
480 }
481
482 static int ocelot_pctl_get_group_pins(struct pinctrl_dev *pctldev,
483 unsigned int group,
484 const unsigned int **pins,
485 unsigned int *num_pins)
486 {
487 struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
488
489 *pins = &info->desc->pins[group].number;
490 *num_pins = 1;
491
492 return 0;
493 }
494
495 static const struct pinctrl_ops ocelot_pctl_ops = {
496 .get_groups_count = ocelot_pctl_get_groups_count,
497 .get_group_name = ocelot_pctl_get_group_name,
498 .get_group_pins = ocelot_pctl_get_group_pins,
499 .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
500 .dt_free_map = pinconf_generic_dt_free_map,
501 };
502
503 static struct pinctrl_desc ocelot_desc = {
504 .name = "ocelot-pinctrl",
505 .pins = ocelot_pins,
506 .npins = ARRAY_SIZE(ocelot_pins),
507 .pctlops = &ocelot_pctl_ops,
508 .pmxops = &ocelot_pmx_ops,
509 .owner = THIS_MODULE,
510 };
511
512 static struct pinctrl_desc jaguar2_desc = {
513 .name = "jaguar2-pinctrl",
514 .pins = jaguar2_pins,
515 .npins = ARRAY_SIZE(jaguar2_pins),
516 .pctlops = &ocelot_pctl_ops,
517 .pmxops = &ocelot_pmx_ops,
518 .owner = THIS_MODULE,
519 };
520
521 static int ocelot_create_group_func_map(struct device *dev,
522 struct ocelot_pinctrl *info)
523 {
524 int f, npins, i;
525 u8 *pins = kcalloc(info->desc->npins, sizeof(u8), GFP_KERNEL);
526
527 if (!pins)
528 return -ENOMEM;
529
530 for (f = 0; f < FUNC_MAX; f++) {
531 for (npins = 0, i = 0; i < info->desc->npins; i++) {
532 if (ocelot_pin_function_idx(info, i, f) >= 0)
533 pins[npins++] = i;
534 }
535
536 if (!npins)
537 continue;
538
539 info->func[f].ngroups = npins;
540 info->func[f].groups = devm_kcalloc(dev, npins, sizeof(char *),
541 GFP_KERNEL);
542 if (!info->func[f].groups) {
543 kfree(pins);
544 return -ENOMEM;
545 }
546
547 for (i = 0; i < npins; i++)
548 info->func[f].groups[i] = info->desc->pins[pins[i]].name;
549 }
550
551 kfree(pins);
552
553 return 0;
554 }
555
556 static int ocelot_pinctrl_register(struct platform_device *pdev,
557 struct ocelot_pinctrl *info)
558 {
559 int ret;
560
561 ret = ocelot_create_group_func_map(&pdev->dev, info);
562 if (ret) {
563 dev_err(&pdev->dev, "Unable to create group func map.\n");
564 return ret;
565 }
566
567 info->pctl = devm_pinctrl_register(&pdev->dev, info->desc, info);
568 if (IS_ERR(info->pctl)) {
569 dev_err(&pdev->dev, "Failed to register pinctrl\n");
570 return PTR_ERR(info->pctl);
571 }
572
573 return 0;
574 }
575
576 static int ocelot_gpio_get(struct gpio_chip *chip, unsigned int offset)
577 {
578 struct ocelot_pinctrl *info = gpiochip_get_data(chip);
579 unsigned int val;
580
581 regmap_read(info->map, REG(OCELOT_GPIO_IN, info, offset), &val);
582
583 return !!(val & BIT(offset % 32));
584 }
585
586 static void ocelot_gpio_set(struct gpio_chip *chip, unsigned int offset,
587 int value)
588 {
589 struct ocelot_pinctrl *info = gpiochip_get_data(chip);
590
591 if (value)
592 regmap_write(info->map, REG(OCELOT_GPIO_OUT_SET, info, offset),
593 BIT(offset % 32));
594 else
595 regmap_write(info->map, REG(OCELOT_GPIO_OUT_CLR, info, offset),
596 BIT(offset % 32));
597 }
598
599 static int ocelot_gpio_get_direction(struct gpio_chip *chip,
600 unsigned int offset)
601 {
602 struct ocelot_pinctrl *info = gpiochip_get_data(chip);
603 unsigned int val;
604
605 regmap_read(info->map, REG(OCELOT_GPIO_OE, info, offset), &val);
606
607 if (val & BIT(offset % 32))
608 return GPIO_LINE_DIRECTION_OUT;
609
610 return GPIO_LINE_DIRECTION_IN;
611 }
612
613 static int ocelot_gpio_direction_input(struct gpio_chip *chip,
614 unsigned int offset)
615 {
616 return pinctrl_gpio_direction_input(chip->base + offset);
617 }
618
619 static int ocelot_gpio_direction_output(struct gpio_chip *chip,
620 unsigned int offset, int value)
621 {
622 struct ocelot_pinctrl *info = gpiochip_get_data(chip);
623 unsigned int pin = BIT(offset % 32);
624
625 if (value)
626 regmap_write(info->map, REG(OCELOT_GPIO_OUT_SET, info, offset),
627 pin);
628 else
629 regmap_write(info->map, REG(OCELOT_GPIO_OUT_CLR, info, offset),
630 pin);
631
632 return pinctrl_gpio_direction_output(chip->base + offset);
633 }
634
635 static const struct gpio_chip ocelot_gpiolib_chip = {
636 .request = gpiochip_generic_request,
637 .free = gpiochip_generic_free,
638 .set = ocelot_gpio_set,
639 .get = ocelot_gpio_get,
640 .get_direction = ocelot_gpio_get_direction,
641 .direction_input = ocelot_gpio_direction_input,
642 .direction_output = ocelot_gpio_direction_output,
643 .owner = THIS_MODULE,
644 };
645
646 static void ocelot_irq_mask(struct irq_data *data)
647 {
648 struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
649 struct ocelot_pinctrl *info = gpiochip_get_data(chip);
650 unsigned int gpio = irqd_to_hwirq(data);
651
652 regmap_update_bits(info->map, REG(OCELOT_GPIO_INTR_ENA, info, gpio),
653 BIT(gpio % 32), 0);
654 }
655
656 static void ocelot_irq_unmask(struct irq_data *data)
657 {
658 struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
659 struct ocelot_pinctrl *info = gpiochip_get_data(chip);
660 unsigned int gpio = irqd_to_hwirq(data);
661
662 regmap_update_bits(info->map, REG(OCELOT_GPIO_INTR_ENA, info, gpio),
663 BIT(gpio % 32), BIT(gpio % 32));
664 }
665
666 static void ocelot_irq_ack(struct irq_data *data)
667 {
668 struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
669 struct ocelot_pinctrl *info = gpiochip_get_data(chip);
670 unsigned int gpio = irqd_to_hwirq(data);
671
672 regmap_write_bits(info->map, REG(OCELOT_GPIO_INTR, info, gpio),
673 BIT(gpio % 32), BIT(gpio % 32));
674 }
675
676 static int ocelot_irq_set_type(struct irq_data *data, unsigned int type);
677
678 static struct irq_chip ocelot_eoi_irqchip = {
679 .name = "gpio",
680 .irq_mask = ocelot_irq_mask,
681 .irq_eoi = ocelot_irq_ack,
682 .irq_unmask = ocelot_irq_unmask,
683 .flags = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED,
684 .irq_set_type = ocelot_irq_set_type,
685 };
686
687 static struct irq_chip ocelot_irqchip = {
688 .name = "gpio",
689 .irq_mask = ocelot_irq_mask,
690 .irq_ack = ocelot_irq_ack,
691 .irq_unmask = ocelot_irq_unmask,
692 .irq_set_type = ocelot_irq_set_type,
693 };
694
695 static int ocelot_irq_set_type(struct irq_data *data, unsigned int type)
696 {
697 type &= IRQ_TYPE_SENSE_MASK;
698
699 if (!(type & (IRQ_TYPE_EDGE_BOTH | IRQ_TYPE_LEVEL_HIGH)))
700 return -EINVAL;
701
702 if (type & IRQ_TYPE_LEVEL_HIGH)
703 irq_set_chip_handler_name_locked(data, &ocelot_eoi_irqchip,
704 handle_fasteoi_irq, NULL);
705 if (type & IRQ_TYPE_EDGE_BOTH)
706 irq_set_chip_handler_name_locked(data, &ocelot_irqchip,
707 handle_edge_irq, NULL);
708
709 return 0;
710 }
711
712 static void ocelot_irq_handler(struct irq_desc *desc)
713 {
714 struct irq_chip *parent_chip = irq_desc_get_chip(desc);
715 struct gpio_chip *chip = irq_desc_get_handler_data(desc);
716 struct ocelot_pinctrl *info = gpiochip_get_data(chip);
717 unsigned int reg = 0, irq, i;
718 unsigned long irqs;
719
720 for (i = 0; i < info->stride; i++) {
721 regmap_read(info->map, OCELOT_GPIO_INTR_IDENT + 4 * i, &reg);
722 if (!reg)
723 continue;
724
725 chained_irq_enter(parent_chip, desc);
726
727 irqs = reg;
728
729 for_each_set_bit(irq, &irqs,
730 min(32U, info->desc->npins - 32 * i))
731 generic_handle_irq(irq_linear_revmap(chip->irq.domain,
732 irq + 32 * i));
733
734 chained_irq_exit(parent_chip, desc);
735 }
736 }
737
738 static int ocelot_gpiochip_register(struct platform_device *pdev,
739 struct ocelot_pinctrl *info)
740 {
741 struct gpio_chip *gc;
742 struct gpio_irq_chip *girq;
743 int ret, irq;
744
745 info->gpio_chip = ocelot_gpiolib_chip;
746
747 gc = &info->gpio_chip;
748 gc->ngpio = info->desc->npins;
749 gc->parent = &pdev->dev;
750 gc->base = 0;
751 gc->of_node = info->dev->of_node;
752 gc->label = "ocelot-gpio";
753
754 irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
755 if (irq <= 0)
756 return irq;
757
758 girq = &gc->irq;
759 girq->chip = &ocelot_irqchip;
760 girq->parent_handler = ocelot_irq_handler;
761 girq->num_parents = 1;
762 girq->parents = devm_kcalloc(&pdev->dev, 1, sizeof(*girq->parents),
763 GFP_KERNEL);
764 if (!girq->parents)
765 return -ENOMEM;
766 girq->parents[0] = irq;
767 girq->default_type = IRQ_TYPE_NONE;
768 girq->handler = handle_edge_irq;
769
770 ret = devm_gpiochip_add_data(&pdev->dev, gc, info);
771 if (ret)
772 return ret;
773
774 return 0;
775 }
776
777 static const struct of_device_id ocelot_pinctrl_of_match[] = {
778 { .compatible = "mscc,ocelot-pinctrl", .data = &ocelot_desc },
779 { .compatible = "mscc,jaguar2-pinctrl", .data = &jaguar2_desc },
780 {},
781 };
782
783 static int ocelot_pinctrl_probe(struct platform_device *pdev)
784 {
785 struct device *dev = &pdev->dev;
786 struct ocelot_pinctrl *info;
787 void __iomem *base;
788 int ret;
789 struct regmap_config regmap_config = {
790 .reg_bits = 32,
791 .val_bits = 32,
792 .reg_stride = 4,
793 };
794
795 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
796 if (!info)
797 return -ENOMEM;
798
799 info->desc = (struct pinctrl_desc *)device_get_match_data(dev);
800
801 base = devm_ioremap_resource(dev,
802 platform_get_resource(pdev, IORESOURCE_MEM, 0));
803 if (IS_ERR(base)) {
804 dev_err(dev, "Failed to ioremap registers\n");
805 return PTR_ERR(base);
806 }
807
808 info->stride = 1 + (info->desc->npins - 1) / 32;
809 regmap_config.max_register = OCELOT_GPIO_SD_MAP * info->stride + 15 * 4;
810
811 info->map = devm_regmap_init_mmio(dev, base, &regmap_config);
812 if (IS_ERR(info->map)) {
813 dev_err(dev, "Failed to create regmap\n");
814 return PTR_ERR(info->map);
815 }
816 dev_set_drvdata(dev, info->map);
817 info->dev = dev;
818
819 ret = ocelot_pinctrl_register(pdev, info);
820 if (ret)
821 return ret;
822
823 ret = ocelot_gpiochip_register(pdev, info);
824 if (ret)
825 return ret;
826
827 return 0;
828 }
829
830 static struct platform_driver ocelot_pinctrl_driver = {
831 .driver = {
832 .name = "pinctrl-ocelot",
833 .of_match_table = of_match_ptr(ocelot_pinctrl_of_match),
834 .suppress_bind_attrs = true,
835 },
836 .probe = ocelot_pinctrl_probe,
837 };
838 builtin_platform_driver(ocelot_pinctrl_driver);
Linux with added FPC-III support