Commit | Line | Data |
---|---|---|
ae6b4d85 LW |
1 | /* |
2 | * Core driver for the pin config portions of the pin control subsystem | |
3 | * | |
4 | * Copyright (C) 2011 ST-Ericsson SA | |
5 | * Written on behalf of Linaro for ST-Ericsson | |
6 | * | |
7 | * Author: Linus Walleij <linus.walleij@linaro.org> | |
8 | * | |
9 | * License terms: GNU General Public License (GPL) version 2 | |
10 | */ | |
11 | #define pr_fmt(fmt) "pinconfig core: " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/device.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/debugfs.h> | |
19 | #include <linux/seq_file.h> | |
f07512e6 | 20 | #include <linux/uaccess.h> |
ae6b4d85 LW |
21 | #include <linux/pinctrl/machine.h> |
22 | #include <linux/pinctrl/pinctrl.h> | |
23 | #include <linux/pinctrl/pinconf.h> | |
24 | #include "core.h" | |
25 | #include "pinconf.h" | |
26 | ||
2b694250 SW |
27 | int pinconf_check_ops(struct pinctrl_dev *pctldev) |
28 | { | |
29 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
30 | ||
31 | /* We must be able to read out pin status */ | |
ad6e1107 JC |
32 | if (!ops->pin_config_get && !ops->pin_config_group_get) { |
33 | dev_err(pctldev->dev, | |
34 | "pinconf must be able to read out pin status\n"); | |
2b694250 | 35 | return -EINVAL; |
ad6e1107 | 36 | } |
2b694250 | 37 | /* We have to be able to config the pins in SOME way */ |
ad6e1107 JC |
38 | if (!ops->pin_config_set && !ops->pin_config_group_set) { |
39 | dev_err(pctldev->dev, | |
40 | "pinconf has to be able to set a pins config\n"); | |
2b694250 | 41 | return -EINVAL; |
ad6e1107 | 42 | } |
2b694250 SW |
43 | return 0; |
44 | } | |
45 | ||
1e2082b5 SW |
46 | int pinconf_validate_map(struct pinctrl_map const *map, int i) |
47 | { | |
48 | if (!map->data.configs.group_or_pin) { | |
49 | pr_err("failed to register map %s (%d): no group/pin given\n", | |
50 | map->name, i); | |
51 | return -EINVAL; | |
52 | } | |
53 | ||
c95df2db | 54 | if (!map->data.configs.num_configs || |
1e2082b5 | 55 | !map->data.configs.configs) { |
c95df2db | 56 | pr_err("failed to register map %s (%d): no configs given\n", |
1e2082b5 SW |
57 | map->name, i); |
58 | return -EINVAL; | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
394349f7 | 64 | int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin, |
ae6b4d85 LW |
65 | unsigned long *config) |
66 | { | |
67 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
68 | ||
69 | if (!ops || !ops->pin_config_get) { | |
51cd24ee | 70 | dev_err(pctldev->dev, "cannot get pin configuration, missing " |
ae6b4d85 LW |
71 | "pin_config_get() function in driver\n"); |
72 | return -EINVAL; | |
73 | } | |
74 | ||
75 | return ops->pin_config_get(pctldev, pin, config); | |
76 | } | |
77 | ||
78 | /** | |
79 | * pin_config_get() - get the configuration of a single pin parameter | |
43699dea | 80 | * @dev_name: name of the pin controller device for this pin |
ae6b4d85 LW |
81 | * @name: name of the pin to get the config for |
82 | * @config: the config pointed to by this argument will be filled in with the | |
83 | * current pin state, it can be used directly by drivers as a numeral, or | |
84 | * it can be dereferenced to any struct. | |
85 | */ | |
43699dea | 86 | int pin_config_get(const char *dev_name, const char *name, |
ae6b4d85 LW |
87 | unsigned long *config) |
88 | { | |
43699dea | 89 | struct pinctrl_dev *pctldev; |
ae6b4d85 LW |
90 | int pin; |
91 | ||
57b676f9 SW |
92 | mutex_lock(&pinctrl_mutex); |
93 | ||
9dfac4fd | 94 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
95 | if (!pctldev) { |
96 | pin = -EINVAL; | |
97 | goto unlock; | |
98 | } | |
43699dea | 99 | |
ae6b4d85 LW |
100 | pin = pin_get_from_name(pctldev, name); |
101 | if (pin < 0) | |
57b676f9 | 102 | goto unlock; |
ae6b4d85 | 103 | |
57b676f9 SW |
104 | pin = pin_config_get_for_pin(pctldev, pin, config); |
105 | ||
106 | unlock: | |
107 | mutex_unlock(&pinctrl_mutex); | |
108 | return pin; | |
ae6b4d85 LW |
109 | } |
110 | EXPORT_SYMBOL(pin_config_get); | |
111 | ||
2b694250 | 112 | static int pin_config_set_for_pin(struct pinctrl_dev *pctldev, unsigned pin, |
ae6b4d85 LW |
113 | unsigned long config) |
114 | { | |
115 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
116 | int ret; | |
117 | ||
118 | if (!ops || !ops->pin_config_set) { | |
51cd24ee | 119 | dev_err(pctldev->dev, "cannot configure pin, missing " |
ae6b4d85 LW |
120 | "config function in driver\n"); |
121 | return -EINVAL; | |
122 | } | |
123 | ||
124 | ret = ops->pin_config_set(pctldev, pin, config); | |
125 | if (ret) { | |
51cd24ee | 126 | dev_err(pctldev->dev, |
ae6b4d85 LW |
127 | "unable to set pin configuration on pin %d\n", pin); |
128 | return ret; | |
129 | } | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | /** | |
135 | * pin_config_set() - set the configuration of a single pin parameter | |
43699dea | 136 | * @dev_name: name of pin controller device for this pin |
ae6b4d85 LW |
137 | * @name: name of the pin to set the config for |
138 | * @config: the config in this argument will contain the desired pin state, it | |
139 | * can be used directly by drivers as a numeral, or it can be dereferenced | |
140 | * to any struct. | |
141 | */ | |
43699dea | 142 | int pin_config_set(const char *dev_name, const char *name, |
ae6b4d85 LW |
143 | unsigned long config) |
144 | { | |
43699dea | 145 | struct pinctrl_dev *pctldev; |
57b676f9 SW |
146 | int pin, ret; |
147 | ||
148 | mutex_lock(&pinctrl_mutex); | |
ae6b4d85 | 149 | |
9dfac4fd | 150 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
151 | if (!pctldev) { |
152 | ret = -EINVAL; | |
153 | goto unlock; | |
154 | } | |
43699dea | 155 | |
ae6b4d85 | 156 | pin = pin_get_from_name(pctldev, name); |
57b676f9 SW |
157 | if (pin < 0) { |
158 | ret = pin; | |
159 | goto unlock; | |
160 | } | |
161 | ||
162 | ret = pin_config_set_for_pin(pctldev, pin, config); | |
ae6b4d85 | 163 | |
57b676f9 SW |
164 | unlock: |
165 | mutex_unlock(&pinctrl_mutex); | |
166 | return ret; | |
ae6b4d85 LW |
167 | } |
168 | EXPORT_SYMBOL(pin_config_set); | |
169 | ||
43699dea | 170 | int pin_config_group_get(const char *dev_name, const char *pin_group, |
ae6b4d85 LW |
171 | unsigned long *config) |
172 | { | |
43699dea SW |
173 | struct pinctrl_dev *pctldev; |
174 | const struct pinconf_ops *ops; | |
57b676f9 SW |
175 | int selector, ret; |
176 | ||
177 | mutex_lock(&pinctrl_mutex); | |
ae6b4d85 | 178 | |
9dfac4fd | 179 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
180 | if (!pctldev) { |
181 | ret = -EINVAL; | |
182 | goto unlock; | |
183 | } | |
43699dea SW |
184 | ops = pctldev->desc->confops; |
185 | ||
ae6b4d85 | 186 | if (!ops || !ops->pin_config_group_get) { |
51cd24ee | 187 | dev_err(pctldev->dev, "cannot get configuration for pin " |
ae6b4d85 LW |
188 | "group, missing group config get function in " |
189 | "driver\n"); | |
57b676f9 SW |
190 | ret = -EINVAL; |
191 | goto unlock; | |
ae6b4d85 LW |
192 | } |
193 | ||
194 | selector = pinctrl_get_group_selector(pctldev, pin_group); | |
57b676f9 SW |
195 | if (selector < 0) { |
196 | ret = selector; | |
197 | goto unlock; | |
198 | } | |
ae6b4d85 | 199 | |
57b676f9 SW |
200 | ret = ops->pin_config_group_get(pctldev, selector, config); |
201 | ||
202 | unlock: | |
203 | mutex_unlock(&pinctrl_mutex); | |
204 | return ret; | |
ae6b4d85 LW |
205 | } |
206 | EXPORT_SYMBOL(pin_config_group_get); | |
207 | ||
43699dea | 208 | int pin_config_group_set(const char *dev_name, const char *pin_group, |
ae6b4d85 LW |
209 | unsigned long config) |
210 | { | |
43699dea SW |
211 | struct pinctrl_dev *pctldev; |
212 | const struct pinconf_ops *ops; | |
213 | const struct pinctrl_ops *pctlops; | |
ae6b4d85 LW |
214 | int selector; |
215 | const unsigned *pins; | |
216 | unsigned num_pins; | |
217 | int ret; | |
218 | int i; | |
219 | ||
57b676f9 SW |
220 | mutex_lock(&pinctrl_mutex); |
221 | ||
9dfac4fd | 222 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
223 | if (!pctldev) { |
224 | ret = -EINVAL; | |
225 | goto unlock; | |
226 | } | |
43699dea SW |
227 | ops = pctldev->desc->confops; |
228 | pctlops = pctldev->desc->pctlops; | |
229 | ||
ae6b4d85 | 230 | if (!ops || (!ops->pin_config_group_set && !ops->pin_config_set)) { |
51cd24ee | 231 | dev_err(pctldev->dev, "cannot configure pin group, missing " |
ae6b4d85 | 232 | "config function in driver\n"); |
57b676f9 SW |
233 | ret = -EINVAL; |
234 | goto unlock; | |
ae6b4d85 LW |
235 | } |
236 | ||
237 | selector = pinctrl_get_group_selector(pctldev, pin_group); | |
57b676f9 SW |
238 | if (selector < 0) { |
239 | ret = selector; | |
240 | goto unlock; | |
241 | } | |
ae6b4d85 LW |
242 | |
243 | ret = pctlops->get_group_pins(pctldev, selector, &pins, &num_pins); | |
244 | if (ret) { | |
51cd24ee | 245 | dev_err(pctldev->dev, "cannot configure pin group, error " |
ae6b4d85 | 246 | "getting pins\n"); |
57b676f9 | 247 | goto unlock; |
ae6b4d85 LW |
248 | } |
249 | ||
250 | /* | |
251 | * If the pin controller supports handling entire groups we use that | |
252 | * capability. | |
253 | */ | |
254 | if (ops->pin_config_group_set) { | |
255 | ret = ops->pin_config_group_set(pctldev, selector, config); | |
256 | /* | |
257 | * If the pin controller prefer that a certain group be handled | |
258 | * pin-by-pin as well, it returns -EAGAIN. | |
259 | */ | |
260 | if (ret != -EAGAIN) | |
57b676f9 | 261 | goto unlock; |
ae6b4d85 LW |
262 | } |
263 | ||
264 | /* | |
265 | * If the controller cannot handle entire groups, we configure each pin | |
266 | * individually. | |
267 | */ | |
57b676f9 SW |
268 | if (!ops->pin_config_set) { |
269 | ret = 0; | |
270 | goto unlock; | |
271 | } | |
ae6b4d85 LW |
272 | |
273 | for (i = 0; i < num_pins; i++) { | |
274 | ret = ops->pin_config_set(pctldev, pins[i], config); | |
275 | if (ret < 0) | |
57b676f9 | 276 | goto unlock; |
ae6b4d85 LW |
277 | } |
278 | ||
57b676f9 SW |
279 | ret = 0; |
280 | ||
281 | unlock: | |
282 | mutex_unlock(&pinctrl_mutex); | |
283 | ||
284 | return ret; | |
ae6b4d85 LW |
285 | } |
286 | EXPORT_SYMBOL(pin_config_group_set); | |
287 | ||
1e2082b5 SW |
288 | int pinconf_map_to_setting(struct pinctrl_map const *map, |
289 | struct pinctrl_setting *setting) | |
290 | { | |
291 | struct pinctrl_dev *pctldev = setting->pctldev; | |
70b36378 | 292 | int pin; |
1e2082b5 SW |
293 | |
294 | switch (setting->type) { | |
295 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
70b36378 LW |
296 | pin = pin_get_from_name(pctldev, |
297 | map->data.configs.group_or_pin); | |
298 | if (pin < 0) { | |
299 | dev_err(pctldev->dev, "could not map pin config for \"%s\"", | |
300 | map->data.configs.group_or_pin); | |
301 | return pin; | |
302 | } | |
303 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
304 | break; |
305 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
70b36378 LW |
306 | pin = pinctrl_get_group_selector(pctldev, |
307 | map->data.configs.group_or_pin); | |
308 | if (pin < 0) { | |
309 | dev_err(pctldev->dev, "could not map group config for \"%s\"", | |
310 | map->data.configs.group_or_pin); | |
311 | return pin; | |
312 | } | |
313 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
314 | break; |
315 | default: | |
316 | return -EINVAL; | |
317 | } | |
318 | ||
319 | setting->data.configs.num_configs = map->data.configs.num_configs; | |
320 | setting->data.configs.configs = map->data.configs.configs; | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | void pinconf_free_setting(struct pinctrl_setting const *setting) | |
326 | { | |
327 | } | |
328 | ||
329 | int pinconf_apply_setting(struct pinctrl_setting const *setting) | |
330 | { | |
331 | struct pinctrl_dev *pctldev = setting->pctldev; | |
332 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
333 | int i, ret; | |
334 | ||
335 | if (!ops) { | |
336 | dev_err(pctldev->dev, "missing confops\n"); | |
337 | return -EINVAL; | |
338 | } | |
339 | ||
340 | switch (setting->type) { | |
341 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
342 | if (!ops->pin_config_set) { | |
343 | dev_err(pctldev->dev, "missing pin_config_set op\n"); | |
344 | return -EINVAL; | |
345 | } | |
346 | for (i = 0; i < setting->data.configs.num_configs; i++) { | |
347 | ret = ops->pin_config_set(pctldev, | |
348 | setting->data.configs.group_or_pin, | |
349 | setting->data.configs.configs[i]); | |
350 | if (ret < 0) { | |
351 | dev_err(pctldev->dev, | |
352 | "pin_config_set op failed for pin %d config %08lx\n", | |
353 | setting->data.configs.group_or_pin, | |
354 | setting->data.configs.configs[i]); | |
355 | return ret; | |
356 | } | |
357 | } | |
358 | break; | |
359 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
360 | if (!ops->pin_config_group_set) { | |
361 | dev_err(pctldev->dev, | |
362 | "missing pin_config_group_set op\n"); | |
363 | return -EINVAL; | |
364 | } | |
365 | for (i = 0; i < setting->data.configs.num_configs; i++) { | |
366 | ret = ops->pin_config_group_set(pctldev, | |
367 | setting->data.configs.group_or_pin, | |
368 | setting->data.configs.configs[i]); | |
369 | if (ret < 0) { | |
370 | dev_err(pctldev->dev, | |
371 | "pin_config_group_set op failed for group %d config %08lx\n", | |
372 | setting->data.configs.group_or_pin, | |
373 | setting->data.configs.configs[i]); | |
374 | return ret; | |
375 | } | |
376 | } | |
377 | break; | |
378 | default: | |
379 | return -EINVAL; | |
380 | } | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
ae6b4d85 LW |
385 | #ifdef CONFIG_DEBUG_FS |
386 | ||
1e2082b5 SW |
387 | void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map) |
388 | { | |
6cb41587 SW |
389 | struct pinctrl_dev *pctldev; |
390 | const struct pinconf_ops *confops; | |
1e2082b5 SW |
391 | int i; |
392 | ||
6cb41587 SW |
393 | pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name); |
394 | if (pctldev) | |
395 | confops = pctldev->desc->confops; | |
396 | else | |
397 | confops = NULL; | |
398 | ||
1e2082b5 SW |
399 | switch (map->type) { |
400 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
401 | seq_printf(s, "pin "); | |
402 | break; | |
403 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
404 | seq_printf(s, "group "); | |
405 | break; | |
406 | default: | |
407 | break; | |
408 | } | |
409 | ||
410 | seq_printf(s, "%s\n", map->data.configs.group_or_pin); | |
411 | ||
6cb41587 SW |
412 | for (i = 0; i < map->data.configs.num_configs; i++) { |
413 | seq_printf(s, "config "); | |
414 | if (confops && confops->pin_config_config_dbg_show) | |
415 | confops->pin_config_config_dbg_show(pctldev, s, | |
416 | map->data.configs.configs[i]); | |
417 | else | |
418 | seq_printf(s, "%08lx", map->data.configs.configs[i]); | |
419 | seq_printf(s, "\n"); | |
420 | } | |
1e2082b5 SW |
421 | } |
422 | ||
423 | void pinconf_show_setting(struct seq_file *s, | |
424 | struct pinctrl_setting const *setting) | |
425 | { | |
426 | struct pinctrl_dev *pctldev = setting->pctldev; | |
427 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
6cb41587 | 428 | const struct pinconf_ops *confops = pctldev->desc->confops; |
1e2082b5 SW |
429 | struct pin_desc *desc; |
430 | int i; | |
431 | ||
432 | switch (setting->type) { | |
433 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
434 | desc = pin_desc_get(setting->pctldev, | |
435 | setting->data.configs.group_or_pin); | |
436 | seq_printf(s, "pin %s (%d)", | |
437 | desc->name ? desc->name : "unnamed", | |
438 | setting->data.configs.group_or_pin); | |
439 | break; | |
440 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
441 | seq_printf(s, "group %s (%d)", | |
442 | pctlops->get_group_name(pctldev, | |
443 | setting->data.configs.group_or_pin), | |
444 | setting->data.configs.group_or_pin); | |
445 | break; | |
446 | default: | |
447 | break; | |
448 | } | |
449 | ||
450 | /* | |
451 | * FIXME: We should really get the pin controler to dump the config | |
452 | * values, so they can be decoded to something meaningful. | |
453 | */ | |
6cb41587 SW |
454 | for (i = 0; i < setting->data.configs.num_configs; i++) { |
455 | seq_printf(s, " "); | |
456 | if (confops && confops->pin_config_config_dbg_show) | |
457 | confops->pin_config_config_dbg_show(pctldev, s, | |
458 | setting->data.configs.configs[i]); | |
459 | else | |
460 | seq_printf(s, "%08lx", | |
461 | setting->data.configs.configs[i]); | |
462 | } | |
1e2082b5 SW |
463 | |
464 | seq_printf(s, "\n"); | |
465 | } | |
466 | ||
ae6b4d85 LW |
467 | static void pinconf_dump_pin(struct pinctrl_dev *pctldev, |
468 | struct seq_file *s, int pin) | |
469 | { | |
470 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
471 | ||
394349f7 LW |
472 | /* no-op when not using generic pin config */ |
473 | pinconf_generic_dump_pin(pctldev, s, pin); | |
ae6b4d85 LW |
474 | if (ops && ops->pin_config_dbg_show) |
475 | ops->pin_config_dbg_show(pctldev, s, pin); | |
476 | } | |
477 | ||
478 | static int pinconf_pins_show(struct seq_file *s, void *what) | |
479 | { | |
480 | struct pinctrl_dev *pctldev = s->private; | |
ad8bb720 | 481 | const struct pinconf_ops *ops = pctldev->desc->confops; |
706e8520 | 482 | unsigned i, pin; |
ae6b4d85 | 483 | |
ad8bb720 DA |
484 | if (!ops || !ops->pin_config_get) |
485 | return 0; | |
486 | ||
ae6b4d85 | 487 | seq_puts(s, "Pin config settings per pin\n"); |
2aeefe02 | 488 | seq_puts(s, "Format: pin (name): configs\n"); |
ae6b4d85 | 489 | |
57b676f9 SW |
490 | mutex_lock(&pinctrl_mutex); |
491 | ||
706e8520 | 492 | /* The pin number can be retrived from the pin controller descriptor */ |
546edd83 | 493 | for (i = 0; i < pctldev->desc->npins; i++) { |
ae6b4d85 LW |
494 | struct pin_desc *desc; |
495 | ||
706e8520 | 496 | pin = pctldev->desc->pins[i].number; |
ae6b4d85 | 497 | desc = pin_desc_get(pctldev, pin); |
706e8520 | 498 | /* Skip if we cannot search the pin */ |
ae6b4d85 LW |
499 | if (desc == NULL) |
500 | continue; | |
501 | ||
502 | seq_printf(s, "pin %d (%s):", pin, | |
503 | desc->name ? desc->name : "unnamed"); | |
504 | ||
505 | pinconf_dump_pin(pctldev, s, pin); | |
506 | ||
507 | seq_printf(s, "\n"); | |
508 | } | |
509 | ||
57b676f9 SW |
510 | mutex_unlock(&pinctrl_mutex); |
511 | ||
ae6b4d85 LW |
512 | return 0; |
513 | } | |
514 | ||
515 | static void pinconf_dump_group(struct pinctrl_dev *pctldev, | |
516 | struct seq_file *s, unsigned selector, | |
517 | const char *gname) | |
518 | { | |
519 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
520 | ||
394349f7 LW |
521 | /* no-op when not using generic pin config */ |
522 | pinconf_generic_dump_group(pctldev, s, gname); | |
ae6b4d85 LW |
523 | if (ops && ops->pin_config_group_dbg_show) |
524 | ops->pin_config_group_dbg_show(pctldev, s, selector); | |
525 | } | |
526 | ||
527 | static int pinconf_groups_show(struct seq_file *s, void *what) | |
528 | { | |
529 | struct pinctrl_dev *pctldev = s->private; | |
530 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
531 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
d1e90e9e | 532 | unsigned ngroups = pctlops->get_groups_count(pctldev); |
ae6b4d85 LW |
533 | unsigned selector = 0; |
534 | ||
535 | if (!ops || !ops->pin_config_group_get) | |
536 | return 0; | |
537 | ||
538 | seq_puts(s, "Pin config settings per pin group\n"); | |
2aeefe02 | 539 | seq_puts(s, "Format: group (name): configs\n"); |
ae6b4d85 | 540 | |
d1e90e9e | 541 | while (selector < ngroups) { |
ae6b4d85 LW |
542 | const char *gname = pctlops->get_group_name(pctldev, selector); |
543 | ||
544 | seq_printf(s, "%u (%s):", selector, gname); | |
545 | pinconf_dump_group(pctldev, s, selector, gname); | |
f7b9006f SW |
546 | seq_printf(s, "\n"); |
547 | ||
ae6b4d85 LW |
548 | selector++; |
549 | } | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | static int pinconf_pins_open(struct inode *inode, struct file *file) | |
555 | { | |
556 | return single_open(file, pinconf_pins_show, inode->i_private); | |
557 | } | |
558 | ||
559 | static int pinconf_groups_open(struct inode *inode, struct file *file) | |
560 | { | |
561 | return single_open(file, pinconf_groups_show, inode->i_private); | |
562 | } | |
563 | ||
564 | static const struct file_operations pinconf_pins_ops = { | |
565 | .open = pinconf_pins_open, | |
566 | .read = seq_read, | |
567 | .llseek = seq_lseek, | |
568 | .release = single_release, | |
569 | }; | |
570 | ||
571 | static const struct file_operations pinconf_groups_ops = { | |
572 | .open = pinconf_groups_open, | |
573 | .read = seq_read, | |
574 | .llseek = seq_lseek, | |
575 | .release = single_release, | |
576 | }; | |
577 | ||
f07512e6 LM |
578 | #define MAX_NAME_LEN 15 |
579 | ||
580 | struct dbg_cfg { | |
581 | enum pinctrl_map_type map_type; | |
582 | char dev_name[MAX_NAME_LEN+1]; | |
583 | char state_name[MAX_NAME_LEN+1]; | |
584 | char pin_name[MAX_NAME_LEN+1]; | |
585 | }; | |
586 | ||
587 | /* | |
588 | * Goal is to keep this structure as global in order to simply read the | |
589 | * pinconf-config file after a write to check config is as expected | |
590 | */ | |
591 | static struct dbg_cfg pinconf_dbg_conf; | |
592 | ||
593 | /** | |
594 | * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl | |
595 | * map, of the dev/pin/state that was last written to pinconf-config file. | |
596 | * @s: string filled in with config description | |
597 | * @d: not used | |
598 | */ | |
599 | static int pinconf_dbg_config_print(struct seq_file *s, void *d) | |
600 | { | |
601 | struct pinctrl_maps *maps_node; | |
602 | const struct pinctrl_map *map; | |
603 | struct pinctrl_dev *pctldev = NULL; | |
604 | const struct pinconf_ops *confops = NULL; | |
605 | const struct pinctrl_map_configs *configs; | |
606 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
607 | int i, j; | |
608 | bool found = false; | |
609 | unsigned long config; | |
610 | ||
611 | mutex_lock(&pinctrl_mutex); | |
612 | ||
613 | /* Parse the pinctrl map and look for the elected pin/state */ | |
614 | for_each_maps(maps_node, i, map) { | |
615 | if (map->type != dbg->map_type) | |
616 | continue; | |
617 | if (strcmp(map->dev_name, dbg->dev_name)) | |
618 | continue; | |
619 | if (strcmp(map->name, dbg->state_name)) | |
620 | continue; | |
621 | ||
622 | for (j = 0; j < map->data.configs.num_configs; j++) { | |
623 | if (!strcmp(map->data.configs.group_or_pin, | |
624 | dbg->pin_name)) { | |
625 | /* | |
626 | * We found the right pin / state, read the | |
627 | * config and he pctldev for later use | |
628 | */ | |
629 | configs = &map->data.configs; | |
630 | pctldev = get_pinctrl_dev_from_devname | |
631 | (map->ctrl_dev_name); | |
632 | found = true; | |
633 | break; | |
634 | } | |
635 | } | |
636 | } | |
637 | ||
638 | if (!found) { | |
639 | seq_printf(s, "No config found for dev/state/pin, expected:\n"); | |
640 | seq_printf(s, "Searched dev:%s\n", dbg->dev_name); | |
641 | seq_printf(s, "Searched state:%s\n", dbg->state_name); | |
642 | seq_printf(s, "Searched pin:%s\n", dbg->pin_name); | |
643 | seq_printf(s, "Use: modify config_pin <devname> "\ | |
644 | "<state> <pinname> <value>\n"); | |
645 | goto exit; | |
646 | } | |
647 | ||
648 | config = *(configs->configs); | |
649 | seq_printf(s, "Dev %s has config of %s in state %s: 0x%08lX\n", | |
650 | dbg->dev_name, dbg->pin_name, | |
651 | dbg->state_name, config); | |
652 | ||
653 | if (pctldev) | |
654 | confops = pctldev->desc->confops; | |
655 | ||
656 | if (confops && confops->pin_config_config_dbg_show) | |
657 | confops->pin_config_config_dbg_show(pctldev, s, config); | |
658 | ||
659 | exit: | |
660 | mutex_unlock(&pinctrl_mutex); | |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
665 | /** | |
666 | * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl | |
667 | * map, of a dev/pin/state entry based on user entries to pinconf-config | |
668 | * @user_buf: contains the modification request with expected format: | |
669 | * modify config_pin <devicename> <state> <pinname> <newvalue> | |
670 | * modify is literal string, alternatives like add/delete not supported yet | |
671 | * config_pin is literal, alternatives like config_mux not supported yet | |
672 | * <devicename> <state> <pinname> are values that should match the pinctrl-maps | |
673 | * <newvalue> reflects the new config and is driver dependant | |
674 | */ | |
675 | static int pinconf_dbg_config_write(struct file *file, | |
676 | const char __user *user_buf, size_t count, loff_t *ppos) | |
677 | { | |
678 | struct pinctrl_maps *maps_node; | |
679 | const struct pinctrl_map *map; | |
680 | struct pinctrl_dev *pctldev = NULL; | |
681 | const struct pinconf_ops *confops = NULL; | |
682 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
683 | const struct pinctrl_map_configs *configs; | |
684 | char config[MAX_NAME_LEN+1]; | |
685 | bool found = false; | |
686 | char buf[128]; | |
687 | char *b = &buf[0]; | |
688 | int buf_size; | |
689 | char *token; | |
690 | int i; | |
691 | ||
692 | /* Get userspace string and assure termination */ | |
693 | buf_size = min(count, (sizeof(buf)-1)); | |
694 | if (copy_from_user(buf, user_buf, buf_size)) | |
695 | return -EFAULT; | |
696 | buf[buf_size] = 0; | |
697 | ||
698 | /* | |
699 | * need to parse entry and extract parameters: | |
700 | * modify configs_pin devicename state pinname newvalue | |
701 | */ | |
702 | ||
703 | /* Get arg: 'modify' */ | |
704 | token = strsep(&b, " "); | |
705 | if (!token) | |
706 | return -EINVAL; | |
707 | if (strcmp(token, "modify")) | |
708 | return -EINVAL; | |
709 | ||
710 | /* Get arg type: "config_pin" type supported so far */ | |
711 | token = strsep(&b, " "); | |
712 | if (!token) | |
713 | return -EINVAL; | |
714 | if (strcmp(token, "config_pin")) | |
715 | return -EINVAL; | |
716 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN; | |
717 | ||
718 | /* get arg 'device_name' */ | |
719 | token = strsep(&b, " "); | |
720 | if (token == NULL) | |
721 | return -EINVAL; | |
722 | if (strlen(token) >= MAX_NAME_LEN) | |
723 | return -EINVAL; | |
724 | strncpy(dbg->dev_name, token, MAX_NAME_LEN); | |
725 | ||
726 | /* get arg 'state_name' */ | |
727 | token = strsep(&b, " "); | |
728 | if (token == NULL) | |
729 | return -EINVAL; | |
730 | if (strlen(token) >= MAX_NAME_LEN) | |
731 | return -EINVAL; | |
732 | strncpy(dbg->state_name, token, MAX_NAME_LEN); | |
733 | ||
734 | /* get arg 'pin_name' */ | |
735 | token = strsep(&b, " "); | |
736 | if (token == NULL) | |
737 | return -EINVAL; | |
738 | if (strlen(token) >= MAX_NAME_LEN) | |
739 | return -EINVAL; | |
740 | strncpy(dbg->pin_name, token, MAX_NAME_LEN); | |
741 | ||
742 | /* get new_value of config' */ | |
743 | token = strsep(&b, " "); | |
744 | if (token == NULL) | |
745 | return -EINVAL; | |
746 | if (strlen(token) >= MAX_NAME_LEN) | |
747 | return -EINVAL; | |
748 | strncpy(config, token, MAX_NAME_LEN); | |
749 | ||
750 | mutex_lock(&pinctrl_mutex); | |
751 | ||
752 | /* Parse the pinctrl map and look for the selected dev/state/pin */ | |
753 | for_each_maps(maps_node, i, map) { | |
754 | if (strcmp(map->dev_name, dbg->dev_name)) | |
755 | continue; | |
756 | if (map->type != dbg->map_type) | |
757 | continue; | |
758 | if (strcmp(map->name, dbg->state_name)) | |
759 | continue; | |
760 | ||
761 | /* we found the right pin / state, so overwrite config */ | |
762 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { | |
763 | found = true; | |
764 | pctldev = get_pinctrl_dev_from_devname( | |
765 | map->ctrl_dev_name); | |
766 | configs = &map->data.configs; | |
767 | break; | |
768 | } | |
769 | } | |
770 | ||
771 | if (!found) { | |
772 | goto exit; | |
773 | count = -EINVAL; | |
774 | } | |
775 | ||
776 | if (pctldev) | |
777 | confops = pctldev->desc->confops; | |
778 | ||
779 | if (confops && confops->pin_config_dbg_parse_modify) { | |
780 | for (i = 0; i < configs->num_configs; i++) { | |
781 | confops->pin_config_dbg_parse_modify(pctldev, | |
782 | config, | |
783 | &configs->configs[i]); | |
784 | } | |
785 | } | |
786 | ||
787 | exit: | |
788 | mutex_unlock(&pinctrl_mutex); | |
789 | ||
790 | return count; | |
791 | } | |
792 | ||
793 | static int pinconf_dbg_config_open(struct inode *inode, struct file *file) | |
794 | { | |
795 | return single_open(file, pinconf_dbg_config_print, inode->i_private); | |
796 | } | |
797 | ||
798 | static const struct file_operations pinconf_dbg_pinconfig_fops = { | |
799 | .open = pinconf_dbg_config_open, | |
800 | .write = pinconf_dbg_config_write, | |
801 | .read = seq_read, | |
802 | .llseek = seq_lseek, | |
803 | .release = single_release, | |
804 | .owner = THIS_MODULE, | |
805 | }; | |
806 | ||
ae6b4d85 LW |
807 | void pinconf_init_device_debugfs(struct dentry *devroot, |
808 | struct pinctrl_dev *pctldev) | |
809 | { | |
810 | debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO, | |
811 | devroot, pctldev, &pinconf_pins_ops); | |
812 | debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO, | |
813 | devroot, pctldev, &pinconf_groups_ops); | |
f07512e6 LM |
814 | debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP), |
815 | devroot, pctldev, &pinconf_dbg_pinconfig_fops); | |
ae6b4d85 LW |
816 | } |
817 | ||
818 | #endif |