1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Combined GPIO and pin controller support for Renesas RZ/A1 (r7s72100) SoC
4 *
5 * Copyright (C) 2017 Jacopo Mondi
6 */
7
8 /*
9 * This pin controller/gpio combined driver supports Renesas devices of RZ/A1
10 * family.
11 * This includes SoCs which are sub- or super- sets of this particular line,
12 * as RZ/A1H (r7s721000), RZ/A1M (r7s721010) and RZ/A1L (r7s721020).
13 */
14
15 #include <linux/bitops.h>
16 #include <linux/err.h>
17 #include <linux/gpio/driver.h>
18 #include <linux/init.h>
19 #include <linux/ioport.h>
20 #include <linux/module.h>
21 #include <linux/of.h>
22 #include <linux/pinctrl/pinconf-generic.h>
23 #include <linux/pinctrl/pinctrl.h>
24 #include <linux/pinctrl/pinmux.h>
25 #include <linux/platform_device.h>
26 #include <linux/property.h>
27 #include <linux/slab.h>
28
29 #include "../core.h"
30 #include "../devicetree.h"
31 #include "../pinconf.h"
32 #include "../pinmux.h"
33
34 #define DRIVER_NAME "pinctrl-rza1"
35
36 #define RZA1_P_REG 0x0000
37 #define RZA1_PPR_REG 0x0200
38 #define RZA1_PM_REG 0x0300
39 #define RZA1_PMC_REG 0x0400
40 #define RZA1_PFC_REG 0x0500
41 #define RZA1_PFCE_REG 0x0600
42 #define RZA1_PFCEA_REG 0x0a00
43 #define RZA1_PIBC_REG 0x4000
44 #define RZA1_PBDC_REG 0x4100
45 #define RZA1_PIPC_REG 0x4200
46
47 #define RZA1_ADDR(mem, reg, port) ((mem) + (reg) + ((port) * 4))
48
49 #define RZA1_NPORTS 12
50 #define RZA1_PINS_PER_PORT 16
51 #define RZA1_NPINS (RZA1_PINS_PER_PORT * RZA1_NPORTS)
52 #define RZA1_PIN_ID_TO_PORT(id) ((id) / RZA1_PINS_PER_PORT)
53 #define RZA1_PIN_ID_TO_PIN(id) ((id) % RZA1_PINS_PER_PORT)
54
55 /*
56 * Use 16 lower bits [15:0] for pin identifier
57 * Use 16 higher bits [31:16] for pin mux function
58 */
59 #define MUX_PIN_ID_MASK GENMASK(15, 0)
60 #define MUX_FUNC_MASK GENMASK(31, 16)
61
62 #define MUX_FUNC_OFFS 16
63 #define MUX_FUNC(pinconf) \
64 ((pinconf & MUX_FUNC_MASK) >> MUX_FUNC_OFFS)
65 #define MUX_FUNC_PFC_MASK BIT(0)
66 #define MUX_FUNC_PFCE_MASK BIT(1)
67 #define MUX_FUNC_PFCEA_MASK BIT(2)
68
69 /* Pin mux flags */
70 #define MUX_FLAGS_BIDIR BIT(0)
71 #define MUX_FLAGS_SWIO_INPUT BIT(1)
72 #define MUX_FLAGS_SWIO_OUTPUT BIT(2)
73
74 /* ----------------------------------------------------------------------------
75 * RZ/A1 pinmux flags
76 */
77
78 /*
79 * rza1_bidir_pin - describe a single pin that needs bidir flag applied.
80 */
81 struct rza1_bidir_pin {
82 u8 pin: 4;
83 u8 func: 4;
84 };
85
86 /*
87 * rza1_bidir_entry - describe a list of pins that needs bidir flag applied.
88 * Each struct rza1_bidir_entry describes a port.
89 */
90 struct rza1_bidir_entry {
91 const unsigned int npins;
92 const struct rza1_bidir_pin *pins;
93 };
94
95 /*
96 * rza1_swio_pin - describe a single pin that needs swio flag applied.
97 */
98 struct rza1_swio_pin {
99 u16 pin: 4;
100 u16 port: 4;
101 u16 func: 4;
102 u16 input: 1;
103 };
104
105 /*
106 * rza1_swio_entry - describe a list of pins that needs swio flag applied
107 */
108 struct rza1_swio_entry {
109 const unsigned int npins;
110 const struct rza1_swio_pin *pins;
111 };
112
113 /*
114 * rza1_pinmux_conf - group together bidir and swio pinmux flag tables
115 */
116 struct rza1_pinmux_conf {
117 const struct rza1_bidir_entry *bidir_entries;
118 const struct rza1_swio_entry *swio_entries;
119 };
120
121 /* ----------------------------------------------------------------------------
122 * RZ/A1H (r7s72100) pinmux flags
123 */
124
125 static const struct rza1_bidir_pin rza1h_bidir_pins_p1[] = {
126 { .pin = 0, .func = 1 },
127 { .pin = 1, .func = 1 },
128 { .pin = 2, .func = 1 },
129 { .pin = 3, .func = 1 },
130 { .pin = 4, .func = 1 },
131 { .pin = 5, .func = 1 },
132 { .pin = 6, .func = 1 },
133 { .pin = 7, .func = 1 },
134 };
135
136 static const struct rza1_bidir_pin rza1h_bidir_pins_p2[] = {
137 { .pin = 0, .func = 1 },
138 { .pin = 1, .func = 1 },
139 { .pin = 2, .func = 1 },
140 { .pin = 3, .func = 1 },
141 { .pin = 4, .func = 1 },
142 { .pin = 0, .func = 4 },
143 { .pin = 1, .func = 4 },
144 { .pin = 2, .func = 4 },
145 { .pin = 3, .func = 4 },
146 { .pin = 5, .func = 1 },
147 { .pin = 6, .func = 1 },
148 { .pin = 7, .func = 1 },
149 { .pin = 8, .func = 1 },
150 { .pin = 9, .func = 1 },
151 { .pin = 10, .func = 1 },
152 { .pin = 11, .func = 1 },
153 { .pin = 12, .func = 1 },
154 { .pin = 13, .func = 1 },
155 { .pin = 14, .func = 1 },
156 { .pin = 15, .func = 1 },
157 { .pin = 12, .func = 4 },
158 { .pin = 13, .func = 4 },
159 { .pin = 14, .func = 4 },
160 { .pin = 15, .func = 4 },
161 };
162
163 static const struct rza1_bidir_pin rza1h_bidir_pins_p3[] = {
164 { .pin = 3, .func = 2 },
165 { .pin = 10, .func = 7 },
166 { .pin = 11, .func = 7 },
167 { .pin = 13, .func = 7 },
168 { .pin = 14, .func = 7 },
169 { .pin = 15, .func = 7 },
170 { .pin = 10, .func = 8 },
171 { .pin = 11, .func = 8 },
172 { .pin = 13, .func = 8 },
173 { .pin = 14, .func = 8 },
174 { .pin = 15, .func = 8 },
175 };
176
177 static const struct rza1_bidir_pin rza1h_bidir_pins_p4[] = {
178 { .pin = 0, .func = 8 },
179 { .pin = 1, .func = 8 },
180 { .pin = 2, .func = 8 },
181 { .pin = 3, .func = 8 },
182 { .pin = 10, .func = 3 },
183 { .pin = 11, .func = 3 },
184 { .pin = 13, .func = 3 },
185 { .pin = 14, .func = 3 },
186 { .pin = 15, .func = 3 },
187 { .pin = 10, .func = 4 },
188 { .pin = 11, .func = 4 },
189 { .pin = 13, .func = 4 },
190 { .pin = 14, .func = 4 },
191 { .pin = 15, .func = 4 },
192 { .pin = 12, .func = 5 },
193 { .pin = 13, .func = 5 },
194 { .pin = 14, .func = 5 },
195 { .pin = 15, .func = 5 },
196 };
197
198 static const struct rza1_bidir_pin rza1h_bidir_pins_p6[] = {
199 { .pin = 0, .func = 1 },
200 { .pin = 1, .func = 1 },
201 { .pin = 2, .func = 1 },
202 { .pin = 3, .func = 1 },
203 { .pin = 4, .func = 1 },
204 { .pin = 5, .func = 1 },
205 { .pin = 6, .func = 1 },
206 { .pin = 7, .func = 1 },
207 { .pin = 8, .func = 1 },
208 { .pin = 9, .func = 1 },
209 { .pin = 10, .func = 1 },
210 { .pin = 11, .func = 1 },
211 { .pin = 12, .func = 1 },
212 { .pin = 13, .func = 1 },
213 { .pin = 14, .func = 1 },
214 { .pin = 15, .func = 1 },
215 };
216
217 static const struct rza1_bidir_pin rza1h_bidir_pins_p7[] = {
218 { .pin = 13, .func = 3 },
219 };
220
221 static const struct rza1_bidir_pin rza1h_bidir_pins_p8[] = {
222 { .pin = 8, .func = 3 },
223 { .pin = 9, .func = 3 },
224 { .pin = 10, .func = 3 },
225 { .pin = 11, .func = 3 },
226 { .pin = 14, .func = 2 },
227 { .pin = 15, .func = 2 },
228 { .pin = 14, .func = 3 },
229 { .pin = 15, .func = 3 },
230 };
231
232 static const struct rza1_bidir_pin rza1h_bidir_pins_p9[] = {
233 { .pin = 0, .func = 2 },
234 { .pin = 1, .func = 2 },
235 { .pin = 4, .func = 2 },
236 { .pin = 5, .func = 2 },
237 { .pin = 6, .func = 2 },
238 { .pin = 7, .func = 2 },
239 };
240
241 static const struct rza1_bidir_pin rza1h_bidir_pins_p11[] = {
242 { .pin = 6, .func = 2 },
243 { .pin = 7, .func = 2 },
244 { .pin = 9, .func = 2 },
245 { .pin = 6, .func = 4 },
246 { .pin = 7, .func = 4 },
247 { .pin = 9, .func = 4 },
248 { .pin = 10, .func = 2 },
249 { .pin = 11, .func = 2 },
250 { .pin = 10, .func = 4 },
251 { .pin = 11, .func = 4 },
252 { .pin = 12, .func = 4 },
253 { .pin = 13, .func = 4 },
254 { .pin = 14, .func = 4 },
255 { .pin = 15, .func = 4 },
256 };
257
258 static const struct rza1_swio_pin rza1h_swio_pins[] = {
259 { .port = 2, .pin = 7, .func = 4, .input = 0 },
260 { .port = 2, .pin = 11, .func = 4, .input = 0 },
261 { .port = 3, .pin = 7, .func = 3, .input = 0 },
262 { .port = 3, .pin = 7, .func = 8, .input = 0 },
263 { .port = 4, .pin = 7, .func = 5, .input = 0 },
264 { .port = 4, .pin = 7, .func = 11, .input = 0 },
265 { .port = 4, .pin = 15, .func = 6, .input = 0 },
266 { .port = 5, .pin = 0, .func = 1, .input = 1 },
267 { .port = 5, .pin = 1, .func = 1, .input = 1 },
268 { .port = 5, .pin = 2, .func = 1, .input = 1 },
269 { .port = 5, .pin = 3, .func = 1, .input = 1 },
270 { .port = 5, .pin = 4, .func = 1, .input = 1 },
271 { .port = 5, .pin = 5, .func = 1, .input = 1 },
272 { .port = 5, .pin = 6, .func = 1, .input = 1 },
273 { .port = 5, .pin = 7, .func = 1, .input = 1 },
274 { .port = 7, .pin = 4, .func = 6, .input = 0 },
275 { .port = 7, .pin = 11, .func = 2, .input = 0 },
276 { .port = 8, .pin = 10, .func = 8, .input = 0 },
277 { .port = 10, .pin = 15, .func = 2, .input = 0 },
278 };
279
280 static const struct rza1_bidir_entry rza1h_bidir_entries[RZA1_NPORTS] = {
281 [1] = { ARRAY_SIZE(rza1h_bidir_pins_p1), rza1h_bidir_pins_p1 },
282 [2] = { ARRAY_SIZE(rza1h_bidir_pins_p2), rza1h_bidir_pins_p2 },
283 [3] = { ARRAY_SIZE(rza1h_bidir_pins_p3), rza1h_bidir_pins_p3 },
284 [4] = { ARRAY_SIZE(rza1h_bidir_pins_p4), rza1h_bidir_pins_p4 },
285 [6] = { ARRAY_SIZE(rza1h_bidir_pins_p6), rza1h_bidir_pins_p6 },
286 [7] = { ARRAY_SIZE(rza1h_bidir_pins_p7), rza1h_bidir_pins_p7 },
287 [8] = { ARRAY_SIZE(rza1h_bidir_pins_p8), rza1h_bidir_pins_p8 },
288 [9] = { ARRAY_SIZE(rza1h_bidir_pins_p9), rza1h_bidir_pins_p9 },
289 [11] = { ARRAY_SIZE(rza1h_bidir_pins_p11), rza1h_bidir_pins_p11 },
290 };
291
292 static const struct rza1_swio_entry rza1h_swio_entries[] = {
293 [0] = { ARRAY_SIZE(rza1h_swio_pins), rza1h_swio_pins },
294 };
295
296 /* RZ/A1H (r7s72100x) pinmux flags table */
297 static const struct rza1_pinmux_conf rza1h_pmx_conf = {
298 .bidir_entries = rza1h_bidir_entries,
299 .swio_entries = rza1h_swio_entries,
300 };
301
302 /* ----------------------------------------------------------------------------
303 * RZ/A1L (r7s72102) pinmux flags
304 */
305
306 static const struct rza1_bidir_pin rza1l_bidir_pins_p1[] = {
307 { .pin = 0, .func = 1 },
308 { .pin = 1, .func = 1 },
309 { .pin = 2, .func = 1 },
310 { .pin = 3, .func = 1 },
311 { .pin = 4, .func = 1 },
312 { .pin = 5, .func = 1 },
313 { .pin = 6, .func = 1 },
314 { .pin = 7, .func = 1 },
315 };
316
317 static const struct rza1_bidir_pin rza1l_bidir_pins_p3[] = {
318 { .pin = 0, .func = 2 },
319 { .pin = 1, .func = 2 },
320 { .pin = 2, .func = 2 },
321 { .pin = 4, .func = 2 },
322 { .pin = 5, .func = 2 },
323 { .pin = 10, .func = 2 },
324 { .pin = 11, .func = 2 },
325 { .pin = 12, .func = 2 },
326 { .pin = 13, .func = 2 },
327 };
328
329 static const struct rza1_bidir_pin rza1l_bidir_pins_p4[] = {
330 { .pin = 1, .func = 4 },
331 { .pin = 2, .func = 2 },
332 { .pin = 3, .func = 2 },
333 { .pin = 6, .func = 2 },
334 { .pin = 7, .func = 2 },
335 };
336
337 static const struct rza1_bidir_pin rza1l_bidir_pins_p5[] = {
338 { .pin = 0, .func = 1 },
339 { .pin = 1, .func = 1 },
340 { .pin = 2, .func = 1 },
341 { .pin = 3, .func = 1 },
342 { .pin = 4, .func = 1 },
343 { .pin = 5, .func = 1 },
344 { .pin = 6, .func = 1 },
345 { .pin = 7, .func = 1 },
346 { .pin = 8, .func = 1 },
347 { .pin = 9, .func = 1 },
348 { .pin = 10, .func = 1 },
349 { .pin = 11, .func = 1 },
350 { .pin = 12, .func = 1 },
351 { .pin = 13, .func = 1 },
352 { .pin = 14, .func = 1 },
353 { .pin = 15, .func = 1 },
354 { .pin = 0, .func = 2 },
355 { .pin = 1, .func = 2 },
356 { .pin = 2, .func = 2 },
357 { .pin = 3, .func = 2 },
358 };
359
360 static const struct rza1_bidir_pin rza1l_bidir_pins_p6[] = {
361 { .pin = 0, .func = 1 },
362 { .pin = 1, .func = 1 },
363 { .pin = 2, .func = 1 },
364 { .pin = 3, .func = 1 },
365 { .pin = 4, .func = 1 },
366 { .pin = 5, .func = 1 },
367 { .pin = 6, .func = 1 },
368 { .pin = 7, .func = 1 },
369 { .pin = 8, .func = 1 },
370 { .pin = 9, .func = 1 },
371 { .pin = 10, .func = 1 },
372 { .pin = 11, .func = 1 },
373 { .pin = 12, .func = 1 },
374 { .pin = 13, .func = 1 },
375 { .pin = 14, .func = 1 },
376 { .pin = 15, .func = 1 },
377 };
378
379 static const struct rza1_bidir_pin rza1l_bidir_pins_p7[] = {
380 { .pin = 2, .func = 2 },
381 { .pin = 3, .func = 2 },
382 { .pin = 5, .func = 2 },
383 { .pin = 6, .func = 2 },
384 { .pin = 7, .func = 2 },
385 { .pin = 2, .func = 3 },
386 { .pin = 3, .func = 3 },
387 { .pin = 5, .func = 3 },
388 { .pin = 6, .func = 3 },
389 { .pin = 7, .func = 3 },
390 };
391
392 static const struct rza1_bidir_pin rza1l_bidir_pins_p9[] = {
393 { .pin = 1, .func = 2 },
394 { .pin = 0, .func = 3 },
395 { .pin = 1, .func = 3 },
396 { .pin = 3, .func = 3 },
397 { .pin = 4, .func = 3 },
398 { .pin = 5, .func = 3 },
399 };
400
401 static const struct rza1_swio_pin rza1l_swio_pins[] = {
402 { .port = 2, .pin = 8, .func = 2, .input = 0 },
403 { .port = 5, .pin = 6, .func = 3, .input = 0 },
404 { .port = 6, .pin = 6, .func = 3, .input = 0 },
405 { .port = 6, .pin = 10, .func = 3, .input = 0 },
406 { .port = 7, .pin = 10, .func = 2, .input = 0 },
407 { .port = 8, .pin = 2, .func = 3, .input = 0 },
408 };
409
410 static const struct rza1_bidir_entry rza1l_bidir_entries[RZA1_NPORTS] = {
411 [1] = { ARRAY_SIZE(rza1l_bidir_pins_p1), rza1l_bidir_pins_p1 },
412 [3] = { ARRAY_SIZE(rza1l_bidir_pins_p3), rza1l_bidir_pins_p3 },
413 [4] = { ARRAY_SIZE(rza1l_bidir_pins_p4), rza1l_bidir_pins_p4 },
414 [5] = { ARRAY_SIZE(rza1l_bidir_pins_p4), rza1l_bidir_pins_p5 },
415 [6] = { ARRAY_SIZE(rza1l_bidir_pins_p6), rza1l_bidir_pins_p6 },
416 [7] = { ARRAY_SIZE(rza1l_bidir_pins_p7), rza1l_bidir_pins_p7 },
417 [9] = { ARRAY_SIZE(rza1l_bidir_pins_p9), rza1l_bidir_pins_p9 },
418 };
419
420 static const struct rza1_swio_entry rza1l_swio_entries[] = {
421 [0] = { ARRAY_SIZE(rza1l_swio_pins), rza1l_swio_pins },
422 };
423
424 /* RZ/A1L (r7s72102x) pinmux flags table */
425 static const struct rza1_pinmux_conf rza1l_pmx_conf = {
426 .bidir_entries = rza1l_bidir_entries,
427 .swio_entries = rza1l_swio_entries,
428 };
429
430 /* ----------------------------------------------------------------------------
431 * RZ/A1 types
432 */
433 /**
434 * struct rza1_mux_conf - describes a pin multiplexing operation
435 *
436 * @id: the pin identifier from 0 to RZA1_NPINS
437 * @port: the port where pin sits on
438 * @pin: pin id
439 * @mux_func: alternate function id number
440 * @mux_flags: alternate function flags
441 * @value: output value to set the pin to
442 */
443 struct rza1_mux_conf {
444 u16 id;
445 u8 port;
446 u8 pin;
447 u8 mux_func;
448 u8 mux_flags;
449 u8 value;
450 };
451
452 /**
453 * struct rza1_port - describes a pin port
454 *
455 * This is mostly useful to lock register writes per-bank and not globally.
456 *
457 * @lock: protect access to HW registers
458 * @id: port number
459 * @base: logical address base
460 * @pins: pins sitting on this port
461 */
462 struct rza1_port {
463 spinlock_t lock;
464 unsigned int id;
465 void __iomem *base;
466 struct pinctrl_pin_desc *pins;
467 };
468
469 /**
470 * struct rza1_pinctrl - RZ pincontroller device
471 *
472 * @dev: parent device structure
473 * @mutex: protect [pinctrl|pinmux]_generic functions
474 * @base: logical address base
475 * @nport: number of pin controller ports
476 * @ports: pin controller banks
477 * @pins: pin array for pinctrl core
478 * @desc: pincontroller desc for pinctrl core
479 * @pctl: pinctrl device
480 * @data: device specific data
481 */
482 struct rza1_pinctrl {
483 struct device *dev;
484
485 struct mutex mutex;
486
487 void __iomem *base;
488
489 unsigned int nport;
490 struct rza1_port *ports;
491
492 struct pinctrl_pin_desc *pins;
493 struct pinctrl_desc desc;
494 struct pinctrl_dev *pctl;
495
496 const void *data;
497 };
498
499 /* ----------------------------------------------------------------------------
500 * RZ/A1 pinmux flags
501 */
rza1_pinmux_get_bidir(unsigned int port,unsigned int pin,unsigned int func,const struct rza1_bidir_entry * table)502 static inline bool rza1_pinmux_get_bidir(unsigned int port,
503 unsigned int pin,
504 unsigned int func,
505 const struct rza1_bidir_entry *table)
506 {
507 const struct rza1_bidir_entry *entry = &table[port];
508 const struct rza1_bidir_pin *bidir_pin;
509 unsigned int i;
510
511 for (i = 0; i < entry->npins; ++i) {
512 bidir_pin = &entry->pins[i];
513 if (bidir_pin->pin == pin && bidir_pin->func == func)
514 return true;
515 }
516
517 return false;
518 }
519
rza1_pinmux_get_swio(unsigned int port,unsigned int pin,unsigned int func,const struct rza1_swio_entry * table)520 static inline int rza1_pinmux_get_swio(unsigned int port,
521 unsigned int pin,
522 unsigned int func,
523 const struct rza1_swio_entry *table)
524 {
525 const struct rza1_swio_pin *swio_pin;
526 unsigned int i;
527
528
529 for (i = 0; i < table->npins; ++i) {
530 swio_pin = &table->pins[i];
531 if (swio_pin->port == port && swio_pin->pin == pin &&
532 swio_pin->func == func)
533 return swio_pin->input;
534 }
535
536 return -ENOENT;
537 }
538
539 /*
540 * rza1_pinmux_get_flags() - return pinmux flags associated to a pin
541 */
rza1_pinmux_get_flags(unsigned int port,unsigned int pin,unsigned int func,struct rza1_pinctrl * rza1_pctl)542 static unsigned int rza1_pinmux_get_flags(unsigned int port, unsigned int pin,
543 unsigned int func,
544 struct rza1_pinctrl *rza1_pctl)
545
546 {
547 const struct rza1_pinmux_conf *pmx_conf = rza1_pctl->data;
548 const struct rza1_bidir_entry *bidir_entries = pmx_conf->bidir_entries;
549 const struct rza1_swio_entry *swio_entries = pmx_conf->swio_entries;
550 unsigned int pmx_flags = 0;
551 int ret;
552
553 if (rza1_pinmux_get_bidir(port, pin, func, bidir_entries))
554 pmx_flags |= MUX_FLAGS_BIDIR;
555
556 ret = rza1_pinmux_get_swio(port, pin, func, swio_entries);
557 if (ret == 0)
558 pmx_flags |= MUX_FLAGS_SWIO_OUTPUT;
559 else if (ret > 0)
560 pmx_flags |= MUX_FLAGS_SWIO_INPUT;
561
562 return pmx_flags;
563 }
564
565 /* ----------------------------------------------------------------------------
566 * RZ/A1 SoC operations
567 */
568
569 /*
570 * rza1_set_bit() - un-locked set/clear a single bit in pin configuration
571 * registers
572 */
rza1_set_bit(struct rza1_port * port,unsigned int reg,unsigned int bit,bool set)573 static inline void rza1_set_bit(struct rza1_port *port, unsigned int reg,
574 unsigned int bit, bool set)
575 {
576 void __iomem *mem = RZA1_ADDR(port->base, reg, port->id);
577 u16 val = ioread16(mem);
578
579 if (set)
580 val |= BIT(bit);
581 else
582 val &= ~BIT(bit);
583
584 iowrite16(val, mem);
585 }
586
rza1_get_bit(struct rza1_port * port,unsigned int reg,unsigned int bit)587 static inline unsigned int rza1_get_bit(struct rza1_port *port,
588 unsigned int reg, unsigned int bit)
589 {
590 void __iomem *mem = RZA1_ADDR(port->base, reg, port->id);
591
592 return ioread16(mem) & BIT(bit);
593 }
594
595 /**
596 * rza1_pin_reset() - reset a pin to default initial state
597 *
598 * Reset pin state disabling input buffer and bi-directional control,
599 * and configure it as input port.
600 * Note that pin is now configured with direction as input but with input
601 * buffer disabled. This implies the pin value cannot be read in this state.
602 *
603 * @port: port where pin sits on
604 * @pin: pin offset
605 */
rza1_pin_reset(struct rza1_port * port,unsigned int pin)606 static void rza1_pin_reset(struct rza1_port *port, unsigned int pin)
607 {
608 unsigned long irqflags;
609
610 spin_lock_irqsave(&port->lock, irqflags);
611 rza1_set_bit(port, RZA1_PIBC_REG, pin, 0);
612 rza1_set_bit(port, RZA1_PBDC_REG, pin, 0);
613
614 rza1_set_bit(port, RZA1_PM_REG, pin, 1);
615 rza1_set_bit(port, RZA1_PMC_REG, pin, 0);
616 rza1_set_bit(port, RZA1_PIPC_REG, pin, 0);
617 spin_unlock_irqrestore(&port->lock, irqflags);
618 }
619
620 /**
621 * rza1_pin_set_direction() - set I/O direction on a pin in port mode
622 *
623 * When running in output port mode keep PBDC enabled to allow reading the
624 * pin value from PPR.
625 *
626 * @port: port where pin sits on
627 * @pin: pin offset
628 * @input: input enable/disable flag
629 */
rza1_pin_set_direction(struct rza1_port * port,unsigned int pin,bool input)630 static inline void rza1_pin_set_direction(struct rza1_port *port,
631 unsigned int pin, bool input)
632 {
633 unsigned long irqflags;
634
635 spin_lock_irqsave(&port->lock, irqflags);
636
637 rza1_set_bit(port, RZA1_PIBC_REG, pin, 1);
638 if (input) {
639 rza1_set_bit(port, RZA1_PM_REG, pin, 1);
640 rza1_set_bit(port, RZA1_PBDC_REG, pin, 0);
641 } else {
642 rza1_set_bit(port, RZA1_PM_REG, pin, 0);
643 rza1_set_bit(port, RZA1_PBDC_REG, pin, 1);
644 }
645
646 spin_unlock_irqrestore(&port->lock, irqflags);
647 }
648
rza1_pin_set(struct rza1_port * port,unsigned int pin,unsigned int value)649 static inline void rza1_pin_set(struct rza1_port *port, unsigned int pin,
650 unsigned int value)
651 {
652 unsigned long irqflags;
653
654 spin_lock_irqsave(&port->lock, irqflags);
655 rza1_set_bit(port, RZA1_P_REG, pin, !!value);
656 spin_unlock_irqrestore(&port->lock, irqflags);
657 }
658
rza1_pin_get(struct rza1_port * port,unsigned int pin)659 static inline int rza1_pin_get(struct rza1_port *port, unsigned int pin)
660 {
661 return rza1_get_bit(port, RZA1_PPR_REG, pin);
662 }
663
664 /**
665 * rza1_pin_mux_single() - configure pin multiplexing on a single pin
666 *
667 * @rza1_pctl: RZ/A1 pin controller device
668 * @mux_conf: pin multiplexing descriptor
669 */
rza1_pin_mux_single(struct rza1_pinctrl * rza1_pctl,struct rza1_mux_conf * mux_conf)670 static int rza1_pin_mux_single(struct rza1_pinctrl *rza1_pctl,
671 struct rza1_mux_conf *mux_conf)
672 {
673 struct rza1_port *port = &rza1_pctl->ports[mux_conf->port];
674 unsigned int pin = mux_conf->pin;
675 u8 mux_func = mux_conf->mux_func;
676 u8 mux_flags = mux_conf->mux_flags;
677 u8 mux_flags_from_table;
678
679 rza1_pin_reset(port, pin);
680
681 /* SWIO pinmux flags coming from DT are high precedence */
682 mux_flags_from_table = rza1_pinmux_get_flags(port->id, pin, mux_func,
683 rza1_pctl);
684 if (mux_flags)
685 mux_flags |= (mux_flags_from_table & MUX_FLAGS_BIDIR);
686 else
687 mux_flags = mux_flags_from_table;
688
689 if (mux_flags & MUX_FLAGS_BIDIR)
690 rza1_set_bit(port, RZA1_PBDC_REG, pin, 1);
691
692 /*
693 * Enable alternate function mode and select it.
694 *
695 * Be careful here: the pin mux sub-nodes in device tree
696 * enumerate alternate functions from 1 to 8;
697 * subtract 1 before using macros to match registers configuration
698 * which expects numbers from 0 to 7 instead.
699 *
700 * ----------------------------------------------------
701 * Alternate mode selection table:
702 *
703 * PMC PFC PFCE PFCAE (mux_func - 1)
704 * 1 0 0 0 0
705 * 1 1 0 0 1
706 * 1 0 1 0 2
707 * 1 1 1 0 3
708 * 1 0 0 1 4
709 * 1 1 0 1 5
710 * 1 0 1 1 6
711 * 1 1 1 1 7
712 * ----------------------------------------------------
713 */
714 mux_func -= 1;
715 rza1_set_bit(port, RZA1_PFC_REG, pin, mux_func & MUX_FUNC_PFC_MASK);
716 rza1_set_bit(port, RZA1_PFCE_REG, pin, mux_func & MUX_FUNC_PFCE_MASK);
717 rza1_set_bit(port, RZA1_PFCEA_REG, pin, mux_func & MUX_FUNC_PFCEA_MASK);
718
719 /*
720 * All alternate functions except a few need PIPCn = 1.
721 * If PIPCn has to stay disabled (SW IO mode), configure PMn according
722 * to I/O direction specified by pin configuration -after- PMC has been
723 * set to one.
724 */
725 if (mux_flags & (MUX_FLAGS_SWIO_INPUT | MUX_FLAGS_SWIO_OUTPUT))
726 rza1_set_bit(port, RZA1_PM_REG, pin,
727 mux_flags & MUX_FLAGS_SWIO_INPUT);
728 else
729 rza1_set_bit(port, RZA1_PIPC_REG, pin, 1);
730
731 rza1_set_bit(port, RZA1_PMC_REG, pin, 1);
732
733 return 0;
734 }
735
736 /* ----------------------------------------------------------------------------
737 * gpio operations
738 */
739
740 /**
741 * rza1_gpio_request() - configure pin in port mode
742 *
743 * Configure a pin as gpio (port mode).
744 * After reset, the pin is in input mode with input buffer disabled.
745 * To use the pin as input or output, set_direction shall be called first
746 *
747 * @chip: gpio chip where the gpio sits on
748 * @gpio: gpio offset
749 */
rza1_gpio_request(struct gpio_chip * chip,unsigned int gpio)750 static int rza1_gpio_request(struct gpio_chip *chip, unsigned int gpio)
751 {
752 struct rza1_port *port = gpiochip_get_data(chip);
753
754 rza1_pin_reset(port, gpio);
755
756 return 0;
757 }
758
759 /**
760 * rza1_gpio_free() - reset a pin
761 *
762 * Surprisingly, freeing a gpio is equivalent to requesting it.
763 * Reset pin to port mode, with input buffer disabled. This overwrites all
764 * port direction settings applied with set_direction
765 *
766 * @chip: gpio chip where the gpio sits on
767 * @gpio: gpio offset
768 */
rza1_gpio_free(struct gpio_chip * chip,unsigned int gpio)769 static void rza1_gpio_free(struct gpio_chip *chip, unsigned int gpio)
770 {
771 struct rza1_port *port = gpiochip_get_data(chip);
772
773 rza1_pin_reset(port, gpio);
774 }
775
rza1_gpio_get_direction(struct gpio_chip * chip,unsigned int gpio)776 static int rza1_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio)
777 {
778 struct rza1_port *port = gpiochip_get_data(chip);
779
780 if (rza1_get_bit(port, RZA1_PM_REG, gpio))
781 return GPIO_LINE_DIRECTION_IN;
782
783 return GPIO_LINE_DIRECTION_OUT;
784 }
785
rza1_gpio_direction_input(struct gpio_chip * chip,unsigned int gpio)786 static int rza1_gpio_direction_input(struct gpio_chip *chip,
787 unsigned int gpio)
788 {
789 struct rza1_port *port = gpiochip_get_data(chip);
790
791 rza1_pin_set_direction(port, gpio, true);
792
793 return 0;
794 }
795
rza1_gpio_direction_output(struct gpio_chip * chip,unsigned int gpio,int value)796 static int rza1_gpio_direction_output(struct gpio_chip *chip,
797 unsigned int gpio,
798 int value)
799 {
800 struct rza1_port *port = gpiochip_get_data(chip);
801
802 /* Set value before driving pin direction */
803 rza1_pin_set(port, gpio, value);
804 rza1_pin_set_direction(port, gpio, false);
805
806 return 0;
807 }
808
809 /**
810 * rza1_gpio_get() - read a gpio pin value
811 *
812 * Read gpio pin value through PPR register.
813 * Requires bi-directional mode to work when reading the value of a pin
814 * in output mode
815 *
816 * @chip: gpio chip where the gpio sits on
817 * @gpio: gpio offset
818 */
rza1_gpio_get(struct gpio_chip * chip,unsigned int gpio)819 static int rza1_gpio_get(struct gpio_chip *chip, unsigned int gpio)
820 {
821 struct rza1_port *port = gpiochip_get_data(chip);
822
823 return rza1_pin_get(port, gpio);
824 }
825
rza1_gpio_set(struct gpio_chip * chip,unsigned int gpio,int value)826 static void rza1_gpio_set(struct gpio_chip *chip, unsigned int gpio,
827 int value)
828 {
829 struct rza1_port *port = gpiochip_get_data(chip);
830
831 rza1_pin_set(port, gpio, value);
832 }
833
834 static const struct gpio_chip rza1_gpiochip_template = {
835 .request = rza1_gpio_request,
836 .free = rza1_gpio_free,
837 .get_direction = rza1_gpio_get_direction,
838 .direction_input = rza1_gpio_direction_input,
839 .direction_output = rza1_gpio_direction_output,
840 .get = rza1_gpio_get,
841 .set = rza1_gpio_set,
842 };
843 /* ----------------------------------------------------------------------------
844 * pinctrl operations
845 */
846
847 /**
848 * rza1_dt_node_pin_count() - Count number of pins in a dt node or in all its
849 * children sub-nodes
850 *
851 * @np: device tree node to parse
852 */
rza1_dt_node_pin_count(struct device_node * np)853 static int rza1_dt_node_pin_count(struct device_node *np)
854 {
855 struct property *of_pins;
856 unsigned int npins;
857
858 of_pins = of_find_property(np, "pinmux", NULL);
859 if (of_pins)
860 return of_pins->length / sizeof(u32);
861
862 npins = 0;
863 for_each_child_of_node_scoped(np, child) {
864 of_pins = of_find_property(child, "pinmux", NULL);
865 if (!of_pins)
866 return -EINVAL;
867
868 npins += of_pins->length / sizeof(u32);
869 }
870
871 return npins;
872 }
873
874 /**
875 * rza1_parse_pinmux_node() - parse a pin mux sub-node
876 *
877 * @rza1_pctl: RZ/A1 pin controller device
878 * @np: of pmx sub-node
879 * @mux_confs: array of pin mux configurations to fill with parsed info
880 * @grpins: array of pin ids to mux
881 */
rza1_parse_pinmux_node(struct rza1_pinctrl * rza1_pctl,struct device_node * np,struct rza1_mux_conf * mux_confs,unsigned int * grpins)882 static int rza1_parse_pinmux_node(struct rza1_pinctrl *rza1_pctl,
883 struct device_node *np,
884 struct rza1_mux_conf *mux_confs,
885 unsigned int *grpins)
886 {
887 struct pinctrl_dev *pctldev = rza1_pctl->pctl;
888 char const *prop_name = "pinmux";
889 unsigned long *pin_configs;
890 unsigned int npin_configs;
891 struct property *of_pins;
892 unsigned int npins;
893 u8 pinmux_flags;
894 unsigned int i;
895 int ret;
896
897 of_pins = of_find_property(np, prop_name, NULL);
898 if (!of_pins) {
899 dev_dbg(rza1_pctl->dev, "Missing %s property\n", prop_name);
900 return -ENOENT;
901 }
902 npins = of_pins->length / sizeof(u32);
903
904 /*
905 * Collect pin configuration properties: they apply to all pins in
906 * this sub-node
907 */
908 ret = pinconf_generic_parse_dt_config(np, pctldev, &pin_configs,
909 &npin_configs);
910 if (ret) {
911 dev_err(rza1_pctl->dev,
912 "Unable to parse pin configuration options for %pOFn\n",
913 np);
914 return ret;
915 }
916
917 /*
918 * Create a mask with pinmux flags from pin configuration;
919 * very few pins (TIOC[0-4][A|B|C|D] require SWIO direction
920 * specified in device tree.
921 */
922 pinmux_flags = 0;
923 for (i = 0; i < npin_configs && pinmux_flags == 0; i++)
924 switch (pinconf_to_config_param(pin_configs[i])) {
925 case PIN_CONFIG_INPUT_ENABLE:
926 pinmux_flags |= MUX_FLAGS_SWIO_INPUT;
927 break;
928 case PIN_CONFIG_OUTPUT: /* for DT backwards compatibility */
929 case PIN_CONFIG_OUTPUT_ENABLE:
930 pinmux_flags |= MUX_FLAGS_SWIO_OUTPUT;
931 break;
932 default:
933 break;
934
935 }
936
937 kfree(pin_configs);
938
939 /* Collect pin positions and their mux settings. */
940 for (i = 0; i < npins; ++i) {
941 u32 of_pinconf;
942 struct rza1_mux_conf *mux_conf = &mux_confs[i];
943
944 ret = of_property_read_u32_index(np, prop_name, i, &of_pinconf);
945 if (ret)
946 return ret;
947
948 mux_conf->id = of_pinconf & MUX_PIN_ID_MASK;
949 mux_conf->port = RZA1_PIN_ID_TO_PORT(mux_conf->id);
950 mux_conf->pin = RZA1_PIN_ID_TO_PIN(mux_conf->id);
951 mux_conf->mux_func = MUX_FUNC(of_pinconf);
952 mux_conf->mux_flags = pinmux_flags;
953
954 if (mux_conf->port >= RZA1_NPORTS ||
955 mux_conf->pin >= RZA1_PINS_PER_PORT) {
956 dev_err(rza1_pctl->dev,
957 "Wrong port %u pin %u for %s property\n",
958 mux_conf->port, mux_conf->pin, prop_name);
959 return -EINVAL;
960 }
961
962 grpins[i] = mux_conf->id;
963 }
964
965 return npins;
966 }
967
968 /**
969 * rza1_dt_node_to_map() - map a pin mux node to a function/group
970 *
971 * Parse and register a pin mux function.
972 *
973 * @pctldev: pin controller device
974 * @np: device tree node to parse
975 * @map: pointer to pin map (output)
976 * @num_maps: number of collected maps (output)
977 */
rza1_dt_node_to_map(struct pinctrl_dev * pctldev,struct device_node * np,struct pinctrl_map ** map,unsigned int * num_maps)978 static int rza1_dt_node_to_map(struct pinctrl_dev *pctldev,
979 struct device_node *np,
980 struct pinctrl_map **map,
981 unsigned int *num_maps)
982 {
983 struct rza1_pinctrl *rza1_pctl = pinctrl_dev_get_drvdata(pctldev);
984 struct rza1_mux_conf *mux_confs, *mux_conf;
985 unsigned int *grpins, *grpin;
986 const char *grpname;
987 const char **fngrps;
988 int ret, npins;
989 int gsel, fsel;
990
991 npins = rza1_dt_node_pin_count(np);
992 if (npins < 0) {
993 dev_err(rza1_pctl->dev, "invalid pinmux node structure\n");
994 return -EINVAL;
995 }
996
997 /*
998 * Functions are made of 1 group only;
999 * in fact, functions and groups are identical for this pin controller
1000 * except that functions carry an array of per-pin mux configuration
1001 * settings.
1002 */
1003 mux_confs = devm_kcalloc(rza1_pctl->dev, npins, sizeof(*mux_confs),
1004 GFP_KERNEL);
1005 grpins = devm_kcalloc(rza1_pctl->dev, npins, sizeof(*grpins),
1006 GFP_KERNEL);
1007 fngrps = devm_kzalloc(rza1_pctl->dev, sizeof(*fngrps), GFP_KERNEL);
1008
1009 if (!mux_confs || !grpins || !fngrps)
1010 return -ENOMEM;
1011
1012 /*
1013 * Parse the pinmux node.
1014 * If the node does not contain "pinmux" property (-ENOENT)
1015 * that property shall be specified in all its children sub-nodes.
1016 */
1017 mux_conf = &mux_confs[0];
1018 grpin = &grpins[0];
1019
1020 ret = rza1_parse_pinmux_node(rza1_pctl, np, mux_conf, grpin);
1021 if (ret == -ENOENT)
1022 for_each_child_of_node_scoped(np, child) {
1023 ret = rza1_parse_pinmux_node(rza1_pctl, child, mux_conf,
1024 grpin);
1025 if (ret < 0)
1026 return ret;
1027
1028 grpin += ret;
1029 mux_conf += ret;
1030 }
1031 else if (ret < 0)
1032 return ret;
1033
1034 /* Register pin group and function name to pinctrl_generic */
1035 grpname = np->name;
1036 fngrps[0] = grpname;
1037
1038 mutex_lock(&rza1_pctl->mutex);
1039 gsel = pinctrl_generic_add_group(pctldev, grpname, grpins, npins,
1040 NULL);
1041 if (gsel < 0) {
1042 mutex_unlock(&rza1_pctl->mutex);
1043 return gsel;
1044 }
1045
1046 fsel = pinmux_generic_add_function(pctldev, grpname, fngrps, 1,
1047 mux_confs);
1048 if (fsel < 0) {
1049 ret = fsel;
1050 goto remove_group;
1051 }
1052
1053 dev_info(rza1_pctl->dev, "Parsed function and group %s with %d pins\n",
1054 grpname, npins);
1055
1056 /* Create map where to retrieve function and mux settings from */
1057 *num_maps = 0;
1058 *map = kzalloc(sizeof(**map), GFP_KERNEL);
1059 if (!*map) {
1060 ret = -ENOMEM;
1061 goto remove_function;
1062 }
1063
1064 (*map)->type = PIN_MAP_TYPE_MUX_GROUP;
1065 (*map)->data.mux.group = np->name;
1066 (*map)->data.mux.function = np->name;
1067 *num_maps = 1;
1068 mutex_unlock(&rza1_pctl->mutex);
1069
1070 return 0;
1071
1072 remove_function:
1073 pinmux_generic_remove_function(pctldev, fsel);
1074
1075 remove_group:
1076 pinctrl_generic_remove_group(pctldev, gsel);
1077 mutex_unlock(&rza1_pctl->mutex);
1078
1079 dev_info(rza1_pctl->dev, "Unable to parse function and group %s\n",
1080 grpname);
1081
1082 return ret;
1083 }
1084
rza1_dt_free_map(struct pinctrl_dev * pctldev,struct pinctrl_map * map,unsigned int num_maps)1085 static void rza1_dt_free_map(struct pinctrl_dev *pctldev,
1086 struct pinctrl_map *map, unsigned int num_maps)
1087 {
1088 kfree(map);
1089 }
1090
1091 static const struct pinctrl_ops rza1_pinctrl_ops = {
1092 .get_groups_count = pinctrl_generic_get_group_count,
1093 .get_group_name = pinctrl_generic_get_group_name,
1094 .get_group_pins = pinctrl_generic_get_group_pins,
1095 .dt_node_to_map = rza1_dt_node_to_map,
1096 .dt_free_map = rza1_dt_free_map,
1097 };
1098
1099 /* ----------------------------------------------------------------------------
1100 * pinmux operations
1101 */
1102
1103 /**
1104 * rza1_set_mux() - retrieve pins from a group and apply their mux settings
1105 *
1106 * @pctldev: pin controller device
1107 * @selector: function selector
1108 * @group: group selector
1109 */
rza1_set_mux(struct pinctrl_dev * pctldev,unsigned int selector,unsigned int group)1110 static int rza1_set_mux(struct pinctrl_dev *pctldev, unsigned int selector,
1111 unsigned int group)
1112 {
1113 struct rza1_pinctrl *rza1_pctl = pinctrl_dev_get_drvdata(pctldev);
1114 struct rza1_mux_conf *mux_confs;
1115 struct function_desc *func;
1116 struct group_desc *grp;
1117 int i;
1118
1119 grp = pinctrl_generic_get_group(pctldev, group);
1120 if (!grp)
1121 return -EINVAL;
1122
1123 func = pinmux_generic_get_function(pctldev, selector);
1124 if (!func)
1125 return -EINVAL;
1126
1127 mux_confs = (struct rza1_mux_conf *)func->data;
1128 for (i = 0; i < grp->grp.npins; ++i) {
1129 int ret;
1130
1131 ret = rza1_pin_mux_single(rza1_pctl, &mux_confs[i]);
1132 if (ret)
1133 return ret;
1134 }
1135
1136 return 0;
1137 }
1138
1139 static const struct pinmux_ops rza1_pinmux_ops = {
1140 .get_functions_count = pinmux_generic_get_function_count,
1141 .get_function_name = pinmux_generic_get_function_name,
1142 .get_function_groups = pinmux_generic_get_function_groups,
1143 .set_mux = rza1_set_mux,
1144 .strict = true,
1145 };
1146
1147 /* ----------------------------------------------------------------------------
1148 * RZ/A1 pin controller driver operations
1149 */
1150
1151 /**
1152 * rza1_parse_gpiochip() - parse and register a gpio chip and pin range
1153 *
1154 * The gpio controller subnode shall provide a "gpio-ranges" list property as
1155 * defined by gpio device tree binding documentation.
1156 *
1157 * @rza1_pctl: RZ/A1 pin controller device
1158 * @fwnode: gpio-controller firmware node
1159 * @chip: gpio chip to register to gpiolib
1160 * @range: pin range to register to pinctrl core
1161 */
rza1_parse_gpiochip(struct rza1_pinctrl * rza1_pctl,struct fwnode_handle * fwnode,struct gpio_chip * chip,struct pinctrl_gpio_range * range)1162 static int rza1_parse_gpiochip(struct rza1_pinctrl *rza1_pctl,
1163 struct fwnode_handle *fwnode,
1164 struct gpio_chip *chip,
1165 struct pinctrl_gpio_range *range)
1166 {
1167 const char *list_name = "gpio-ranges";
1168 struct fwnode_reference_args args;
1169 unsigned int gpioport;
1170 u32 pinctrl_base;
1171 int ret;
1172
1173 ret = fwnode_property_get_reference_args(fwnode, list_name, NULL, 3, 0, &args);
1174 if (ret) {
1175 dev_err(rza1_pctl->dev, "Unable to parse %s list property\n",
1176 list_name);
1177 return ret;
1178 }
1179
1180 /*
1181 * Find out on which port this gpio-chip maps to by inspecting the
1182 * second argument of the "gpio-ranges" property.
1183 */
1184 pinctrl_base = args.args[1];
1185 gpioport = RZA1_PIN_ID_TO_PORT(pinctrl_base);
1186 if (gpioport >= RZA1_NPORTS) {
1187 dev_err(rza1_pctl->dev,
1188 "Invalid values in property %s\n", list_name);
1189 return -EINVAL;
1190 }
1191
1192 *chip = rza1_gpiochip_template;
1193 chip->base = -1;
1194 chip->ngpio = args.args[2];
1195 chip->label = devm_kasprintf(rza1_pctl->dev, GFP_KERNEL, "%pfwP", fwnode);
1196 if (!chip->label)
1197 return -ENOMEM;
1198
1199 chip->fwnode = fwnode;
1200 chip->parent = rza1_pctl->dev;
1201
1202 range->id = gpioport;
1203 range->name = chip->label;
1204 range->pin_base = range->base = pinctrl_base;
1205 range->npins = args.args[2];
1206 range->gc = chip;
1207
1208 ret = devm_gpiochip_add_data(rza1_pctl->dev, chip,
1209 &rza1_pctl->ports[gpioport]);
1210 if (ret)
1211 return ret;
1212
1213 pinctrl_add_gpio_range(rza1_pctl->pctl, range);
1214
1215 dev_dbg(rza1_pctl->dev, "Parsed gpiochip %s with %d pins\n",
1216 chip->label, chip->ngpio);
1217
1218 return 0;
1219 }
1220
1221 /**
1222 * rza1_gpio_register() - parse DT to collect gpio-chips and gpio-ranges
1223 *
1224 * @rza1_pctl: RZ/A1 pin controller device
1225 */
rza1_gpio_register(struct rza1_pinctrl * rza1_pctl)1226 static int rza1_gpio_register(struct rza1_pinctrl *rza1_pctl)
1227 {
1228 struct pinctrl_gpio_range *gpio_ranges;
1229 struct gpio_chip *gpio_chips;
1230 struct fwnode_handle *child;
1231 unsigned int ngpiochips;
1232 unsigned int i;
1233 int ret;
1234
1235 ngpiochips = gpiochip_node_count(rza1_pctl->dev);
1236 if (ngpiochips == 0) {
1237 dev_dbg(rza1_pctl->dev, "No gpiochip registered\n");
1238 return 0;
1239 }
1240
1241 gpio_chips = devm_kcalloc(rza1_pctl->dev, ngpiochips,
1242 sizeof(*gpio_chips), GFP_KERNEL);
1243 gpio_ranges = devm_kcalloc(rza1_pctl->dev, ngpiochips,
1244 sizeof(*gpio_ranges), GFP_KERNEL);
1245 if (!gpio_chips || !gpio_ranges)
1246 return -ENOMEM;
1247
1248 i = 0;
1249 for_each_gpiochip_node(rza1_pctl->dev, child) {
1250 ret = rza1_parse_gpiochip(rza1_pctl, child, &gpio_chips[i],
1251 &gpio_ranges[i]);
1252 if (ret) {
1253 fwnode_handle_put(child);
1254 return ret;
1255 }
1256
1257 ++i;
1258 }
1259
1260 dev_info(rza1_pctl->dev, "Registered %u gpio controllers\n", i);
1261
1262 return 0;
1263 }
1264
1265 /**
1266 * rza1_pinctrl_register() - Enumerate pins, ports and gpiochips; register
1267 * them to pinctrl and gpio cores.
1268 *
1269 * @rza1_pctl: RZ/A1 pin controller device
1270 */
rza1_pinctrl_register(struct rza1_pinctrl * rza1_pctl)1271 static int rza1_pinctrl_register(struct rza1_pinctrl *rza1_pctl)
1272 {
1273 struct pinctrl_pin_desc *pins;
1274 struct rza1_port *ports;
1275 unsigned int i;
1276 int ret;
1277
1278 pins = devm_kcalloc(rza1_pctl->dev, RZA1_NPINS, sizeof(*pins),
1279 GFP_KERNEL);
1280 ports = devm_kcalloc(rza1_pctl->dev, RZA1_NPORTS, sizeof(*ports),
1281 GFP_KERNEL);
1282 if (!pins || !ports)
1283 return -ENOMEM;
1284
1285 rza1_pctl->pins = pins;
1286 rza1_pctl->desc.pins = pins;
1287 rza1_pctl->desc.npins = RZA1_NPINS;
1288 rza1_pctl->ports = ports;
1289
1290 for (i = 0; i < RZA1_NPINS; ++i) {
1291 unsigned int pin = RZA1_PIN_ID_TO_PIN(i);
1292 unsigned int port = RZA1_PIN_ID_TO_PORT(i);
1293
1294 pins[i].number = i;
1295 pins[i].name = devm_kasprintf(rza1_pctl->dev, GFP_KERNEL,
1296 "P%u-%u", port, pin);
1297 if (!pins[i].name)
1298 return -ENOMEM;
1299
1300 if (i % RZA1_PINS_PER_PORT == 0) {
1301 /*
1302 * Setup ports;
1303 * they provide per-port lock and logical base address.
1304 */
1305 unsigned int port_id = RZA1_PIN_ID_TO_PORT(i);
1306
1307 ports[port_id].id = port_id;
1308 ports[port_id].base = rza1_pctl->base;
1309 ports[port_id].pins = &pins[i];
1310 spin_lock_init(&ports[port_id].lock);
1311 }
1312 }
1313
1314 ret = devm_pinctrl_register_and_init(rza1_pctl->dev, &rza1_pctl->desc,
1315 rza1_pctl, &rza1_pctl->pctl);
1316 if (ret) {
1317 dev_err(rza1_pctl->dev,
1318 "RZ/A1 pin controller registration failed\n");
1319 return ret;
1320 }
1321
1322 ret = pinctrl_enable(rza1_pctl->pctl);
1323 if (ret) {
1324 dev_err(rza1_pctl->dev,
1325 "RZ/A1 pin controller failed to start\n");
1326 return ret;
1327 }
1328
1329 ret = rza1_gpio_register(rza1_pctl);
1330 if (ret) {
1331 dev_err(rza1_pctl->dev, "RZ/A1 GPIO registration failed\n");
1332 return ret;
1333 }
1334
1335 return 0;
1336 }
1337
rza1_pinctrl_probe(struct platform_device * pdev)1338 static int rza1_pinctrl_probe(struct platform_device *pdev)
1339 {
1340 struct rza1_pinctrl *rza1_pctl;
1341 int ret;
1342
1343 rza1_pctl = devm_kzalloc(&pdev->dev, sizeof(*rza1_pctl), GFP_KERNEL);
1344 if (!rza1_pctl)
1345 return -ENOMEM;
1346
1347 rza1_pctl->dev = &pdev->dev;
1348
1349 rza1_pctl->base = devm_platform_ioremap_resource(pdev, 0);
1350 if (IS_ERR(rza1_pctl->base))
1351 return PTR_ERR(rza1_pctl->base);
1352
1353 mutex_init(&rza1_pctl->mutex);
1354
1355 platform_set_drvdata(pdev, rza1_pctl);
1356
1357 rza1_pctl->desc.name = DRIVER_NAME;
1358 rza1_pctl->desc.pctlops = &rza1_pinctrl_ops;
1359 rza1_pctl->desc.pmxops = &rza1_pinmux_ops;
1360 rza1_pctl->desc.owner = THIS_MODULE;
1361 rza1_pctl->data = of_device_get_match_data(&pdev->dev);
1362
1363 ret = rza1_pinctrl_register(rza1_pctl);
1364 if (ret)
1365 return ret;
1366
1367 dev_info(&pdev->dev,
1368 "RZ/A1 pin controller and gpio successfully registered\n");
1369
1370 return 0;
1371 }
1372
1373 static const struct of_device_id rza1_pinctrl_of_match[] = {
1374 {
1375 /* RZ/A1H, RZ/A1M */
1376 .compatible = "renesas,r7s72100-ports",
1377 .data = &rza1h_pmx_conf,
1378 },
1379 {
1380 /* RZ/A1L */
1381 .compatible = "renesas,r7s72102-ports",
1382 .data = &rza1l_pmx_conf,
1383 },
1384 { /* sentinel */ }
1385 };
1386
1387 static struct platform_driver rza1_pinctrl_driver = {
1388 .driver = {
1389 .name = DRIVER_NAME,
1390 .of_match_table = rza1_pinctrl_of_match,
1391 },
1392 .probe = rza1_pinctrl_probe,
1393 };
1394
rza1_pinctrl_init(void)1395 static int __init rza1_pinctrl_init(void)
1396 {
1397 return platform_driver_register(&rza1_pinctrl_driver);
1398 }
1399 core_initcall(rza1_pinctrl_init);
1400
1401 MODULE_AUTHOR("Jacopo Mondi <jacopo+renesas@jmondi.org");
1402 MODULE_DESCRIPTION("Pin and gpio controller driver for Reneas RZ/A1 SoC");
1403