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Commit | Line | Data |
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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 | ||
9dfac4fd | 92 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
93 | if (!pctldev) { |
94 | pin = -EINVAL; | |
42fed7ba | 95 | return pin; |
57b676f9 | 96 | } |
43699dea | 97 | |
42fed7ba PC |
98 | mutex_lock(&pctldev->mutex); |
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: | |
42fed7ba | 107 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 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 | ||
9dfac4fd | 148 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
149 | if (!pctldev) { |
150 | ret = -EINVAL; | |
42fed7ba | 151 | return ret; |
57b676f9 | 152 | } |
43699dea | 153 | |
42fed7ba PC |
154 | mutex_lock(&pctldev->mutex); |
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 | 164 | unlock: |
42fed7ba | 165 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 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 | ||
9dfac4fd | 177 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
178 | if (!pctldev) { |
179 | ret = -EINVAL; | |
42fed7ba | 180 | return ret; |
57b676f9 | 181 | } |
42fed7ba PC |
182 | |
183 | mutex_lock(&pctldev->mutex); | |
184 | ||
43699dea SW |
185 | ops = pctldev->desc->confops; |
186 | ||
ae6b4d85 | 187 | if (!ops || !ops->pin_config_group_get) { |
51cd24ee | 188 | dev_err(pctldev->dev, "cannot get configuration for pin " |
ae6b4d85 LW |
189 | "group, missing group config get function in " |
190 | "driver\n"); | |
57b676f9 SW |
191 | ret = -EINVAL; |
192 | goto unlock; | |
ae6b4d85 LW |
193 | } |
194 | ||
195 | selector = pinctrl_get_group_selector(pctldev, pin_group); | |
57b676f9 SW |
196 | if (selector < 0) { |
197 | ret = selector; | |
198 | goto unlock; | |
199 | } | |
ae6b4d85 | 200 | |
57b676f9 SW |
201 | ret = ops->pin_config_group_get(pctldev, selector, config); |
202 | ||
203 | unlock: | |
42fed7ba | 204 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 205 | return ret; |
ae6b4d85 LW |
206 | } |
207 | EXPORT_SYMBOL(pin_config_group_get); | |
208 | ||
43699dea | 209 | int pin_config_group_set(const char *dev_name, const char *pin_group, |
ae6b4d85 LW |
210 | unsigned long config) |
211 | { | |
43699dea SW |
212 | struct pinctrl_dev *pctldev; |
213 | const struct pinconf_ops *ops; | |
214 | const struct pinctrl_ops *pctlops; | |
ae6b4d85 LW |
215 | int selector; |
216 | const unsigned *pins; | |
217 | unsigned num_pins; | |
218 | int ret; | |
219 | int i; | |
220 | ||
9dfac4fd | 221 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
222 | if (!pctldev) { |
223 | ret = -EINVAL; | |
42fed7ba | 224 | return ret; |
57b676f9 | 225 | } |
42fed7ba PC |
226 | |
227 | mutex_lock(&pctldev->mutex); | |
228 | ||
43699dea SW |
229 | ops = pctldev->desc->confops; |
230 | pctlops = pctldev->desc->pctlops; | |
231 | ||
ae6b4d85 | 232 | if (!ops || (!ops->pin_config_group_set && !ops->pin_config_set)) { |
51cd24ee | 233 | dev_err(pctldev->dev, "cannot configure pin group, missing " |
ae6b4d85 | 234 | "config function in driver\n"); |
57b676f9 SW |
235 | ret = -EINVAL; |
236 | goto unlock; | |
ae6b4d85 LW |
237 | } |
238 | ||
239 | selector = pinctrl_get_group_selector(pctldev, pin_group); | |
57b676f9 SW |
240 | if (selector < 0) { |
241 | ret = selector; | |
242 | goto unlock; | |
243 | } | |
ae6b4d85 LW |
244 | |
245 | ret = pctlops->get_group_pins(pctldev, selector, &pins, &num_pins); | |
246 | if (ret) { | |
51cd24ee | 247 | dev_err(pctldev->dev, "cannot configure pin group, error " |
ae6b4d85 | 248 | "getting pins\n"); |
57b676f9 | 249 | goto unlock; |
ae6b4d85 LW |
250 | } |
251 | ||
252 | /* | |
253 | * If the pin controller supports handling entire groups we use that | |
254 | * capability. | |
255 | */ | |
256 | if (ops->pin_config_group_set) { | |
257 | ret = ops->pin_config_group_set(pctldev, selector, config); | |
258 | /* | |
259 | * If the pin controller prefer that a certain group be handled | |
260 | * pin-by-pin as well, it returns -EAGAIN. | |
261 | */ | |
262 | if (ret != -EAGAIN) | |
57b676f9 | 263 | goto unlock; |
ae6b4d85 LW |
264 | } |
265 | ||
266 | /* | |
267 | * If the controller cannot handle entire groups, we configure each pin | |
268 | * individually. | |
269 | */ | |
57b676f9 SW |
270 | if (!ops->pin_config_set) { |
271 | ret = 0; | |
272 | goto unlock; | |
273 | } | |
ae6b4d85 LW |
274 | |
275 | for (i = 0; i < num_pins; i++) { | |
276 | ret = ops->pin_config_set(pctldev, pins[i], config); | |
277 | if (ret < 0) | |
57b676f9 | 278 | goto unlock; |
ae6b4d85 LW |
279 | } |
280 | ||
57b676f9 SW |
281 | ret = 0; |
282 | ||
283 | unlock: | |
42fed7ba | 284 | mutex_unlock(&pctldev->mutex); |
57b676f9 SW |
285 | |
286 | return ret; | |
ae6b4d85 LW |
287 | } |
288 | EXPORT_SYMBOL(pin_config_group_set); | |
289 | ||
1e2082b5 SW |
290 | int pinconf_map_to_setting(struct pinctrl_map const *map, |
291 | struct pinctrl_setting *setting) | |
292 | { | |
293 | struct pinctrl_dev *pctldev = setting->pctldev; | |
70b36378 | 294 | int pin; |
1e2082b5 SW |
295 | |
296 | switch (setting->type) { | |
297 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
70b36378 LW |
298 | pin = pin_get_from_name(pctldev, |
299 | map->data.configs.group_or_pin); | |
300 | if (pin < 0) { | |
301 | dev_err(pctldev->dev, "could not map pin config for \"%s\"", | |
302 | map->data.configs.group_or_pin); | |
303 | return pin; | |
304 | } | |
305 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
306 | break; |
307 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
70b36378 LW |
308 | pin = pinctrl_get_group_selector(pctldev, |
309 | map->data.configs.group_or_pin); | |
310 | if (pin < 0) { | |
311 | dev_err(pctldev->dev, "could not map group config for \"%s\"", | |
312 | map->data.configs.group_or_pin); | |
313 | return pin; | |
314 | } | |
315 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
316 | break; |
317 | default: | |
318 | return -EINVAL; | |
319 | } | |
320 | ||
321 | setting->data.configs.num_configs = map->data.configs.num_configs; | |
322 | setting->data.configs.configs = map->data.configs.configs; | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | void pinconf_free_setting(struct pinctrl_setting const *setting) | |
328 | { | |
329 | } | |
330 | ||
331 | int pinconf_apply_setting(struct pinctrl_setting const *setting) | |
332 | { | |
333 | struct pinctrl_dev *pctldev = setting->pctldev; | |
334 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
335 | int i, ret; | |
336 | ||
337 | if (!ops) { | |
338 | dev_err(pctldev->dev, "missing confops\n"); | |
339 | return -EINVAL; | |
340 | } | |
341 | ||
342 | switch (setting->type) { | |
343 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
344 | if (!ops->pin_config_set) { | |
345 | dev_err(pctldev->dev, "missing pin_config_set op\n"); | |
346 | return -EINVAL; | |
347 | } | |
348 | for (i = 0; i < setting->data.configs.num_configs; i++) { | |
349 | ret = ops->pin_config_set(pctldev, | |
350 | setting->data.configs.group_or_pin, | |
351 | setting->data.configs.configs[i]); | |
352 | if (ret < 0) { | |
353 | dev_err(pctldev->dev, | |
354 | "pin_config_set op failed for pin %d config %08lx\n", | |
355 | setting->data.configs.group_or_pin, | |
356 | setting->data.configs.configs[i]); | |
357 | return ret; | |
358 | } | |
359 | } | |
360 | break; | |
361 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
362 | if (!ops->pin_config_group_set) { | |
363 | dev_err(pctldev->dev, | |
364 | "missing pin_config_group_set op\n"); | |
365 | return -EINVAL; | |
366 | } | |
367 | for (i = 0; i < setting->data.configs.num_configs; i++) { | |
368 | ret = ops->pin_config_group_set(pctldev, | |
369 | setting->data.configs.group_or_pin, | |
370 | setting->data.configs.configs[i]); | |
371 | if (ret < 0) { | |
372 | dev_err(pctldev->dev, | |
373 | "pin_config_group_set op failed for group %d config %08lx\n", | |
374 | setting->data.configs.group_or_pin, | |
375 | setting->data.configs.configs[i]); | |
376 | return ret; | |
377 | } | |
378 | } | |
379 | break; | |
380 | default: | |
381 | return -EINVAL; | |
382 | } | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
ae6b4d85 LW |
387 | #ifdef CONFIG_DEBUG_FS |
388 | ||
1e2082b5 SW |
389 | void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map) |
390 | { | |
6cb41587 SW |
391 | struct pinctrl_dev *pctldev; |
392 | const struct pinconf_ops *confops; | |
1e2082b5 SW |
393 | int i; |
394 | ||
6cb41587 SW |
395 | pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name); |
396 | if (pctldev) | |
397 | confops = pctldev->desc->confops; | |
398 | else | |
399 | confops = NULL; | |
400 | ||
1e2082b5 SW |
401 | switch (map->type) { |
402 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
403 | seq_printf(s, "pin "); | |
404 | break; | |
405 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
406 | seq_printf(s, "group "); | |
407 | break; | |
408 | default: | |
409 | break; | |
410 | } | |
411 | ||
412 | seq_printf(s, "%s\n", map->data.configs.group_or_pin); | |
413 | ||
6cb41587 SW |
414 | for (i = 0; i < map->data.configs.num_configs; i++) { |
415 | seq_printf(s, "config "); | |
416 | if (confops && confops->pin_config_config_dbg_show) | |
417 | confops->pin_config_config_dbg_show(pctldev, s, | |
418 | map->data.configs.configs[i]); | |
419 | else | |
420 | seq_printf(s, "%08lx", map->data.configs.configs[i]); | |
421 | seq_printf(s, "\n"); | |
422 | } | |
1e2082b5 SW |
423 | } |
424 | ||
425 | void pinconf_show_setting(struct seq_file *s, | |
426 | struct pinctrl_setting const *setting) | |
427 | { | |
428 | struct pinctrl_dev *pctldev = setting->pctldev; | |
429 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
6cb41587 | 430 | const struct pinconf_ops *confops = pctldev->desc->confops; |
1e2082b5 SW |
431 | struct pin_desc *desc; |
432 | int i; | |
433 | ||
434 | switch (setting->type) { | |
435 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
436 | desc = pin_desc_get(setting->pctldev, | |
437 | setting->data.configs.group_or_pin); | |
438 | seq_printf(s, "pin %s (%d)", | |
439 | desc->name ? desc->name : "unnamed", | |
440 | setting->data.configs.group_or_pin); | |
441 | break; | |
442 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
443 | seq_printf(s, "group %s (%d)", | |
444 | pctlops->get_group_name(pctldev, | |
445 | setting->data.configs.group_or_pin), | |
446 | setting->data.configs.group_or_pin); | |
447 | break; | |
448 | default: | |
449 | break; | |
450 | } | |
451 | ||
452 | /* | |
453 | * FIXME: We should really get the pin controler to dump the config | |
454 | * values, so they can be decoded to something meaningful. | |
455 | */ | |
6cb41587 SW |
456 | for (i = 0; i < setting->data.configs.num_configs; i++) { |
457 | seq_printf(s, " "); | |
458 | if (confops && confops->pin_config_config_dbg_show) | |
459 | confops->pin_config_config_dbg_show(pctldev, s, | |
460 | setting->data.configs.configs[i]); | |
461 | else | |
462 | seq_printf(s, "%08lx", | |
463 | setting->data.configs.configs[i]); | |
464 | } | |
1e2082b5 SW |
465 | |
466 | seq_printf(s, "\n"); | |
467 | } | |
468 | ||
ae6b4d85 LW |
469 | static void pinconf_dump_pin(struct pinctrl_dev *pctldev, |
470 | struct seq_file *s, int pin) | |
471 | { | |
472 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
473 | ||
394349f7 LW |
474 | /* no-op when not using generic pin config */ |
475 | pinconf_generic_dump_pin(pctldev, s, pin); | |
ae6b4d85 LW |
476 | if (ops && ops->pin_config_dbg_show) |
477 | ops->pin_config_dbg_show(pctldev, s, pin); | |
478 | } | |
479 | ||
480 | static int pinconf_pins_show(struct seq_file *s, void *what) | |
481 | { | |
482 | struct pinctrl_dev *pctldev = s->private; | |
ad8bb720 | 483 | const struct pinconf_ops *ops = pctldev->desc->confops; |
706e8520 | 484 | unsigned i, pin; |
ae6b4d85 | 485 | |
ad8bb720 DA |
486 | if (!ops || !ops->pin_config_get) |
487 | return 0; | |
488 | ||
ae6b4d85 | 489 | seq_puts(s, "Pin config settings per pin\n"); |
2aeefe02 | 490 | seq_puts(s, "Format: pin (name): configs\n"); |
ae6b4d85 | 491 | |
42fed7ba | 492 | mutex_lock(&pctldev->mutex); |
57b676f9 | 493 | |
706e8520 | 494 | /* The pin number can be retrived from the pin controller descriptor */ |
546edd83 | 495 | for (i = 0; i < pctldev->desc->npins; i++) { |
ae6b4d85 LW |
496 | struct pin_desc *desc; |
497 | ||
706e8520 | 498 | pin = pctldev->desc->pins[i].number; |
ae6b4d85 | 499 | desc = pin_desc_get(pctldev, pin); |
706e8520 | 500 | /* Skip if we cannot search the pin */ |
ae6b4d85 LW |
501 | if (desc == NULL) |
502 | continue; | |
503 | ||
504 | seq_printf(s, "pin %d (%s):", pin, | |
505 | desc->name ? desc->name : "unnamed"); | |
506 | ||
507 | pinconf_dump_pin(pctldev, s, pin); | |
508 | ||
509 | seq_printf(s, "\n"); | |
510 | } | |
511 | ||
42fed7ba | 512 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 513 | |
ae6b4d85 LW |
514 | return 0; |
515 | } | |
516 | ||
517 | static void pinconf_dump_group(struct pinctrl_dev *pctldev, | |
518 | struct seq_file *s, unsigned selector, | |
519 | const char *gname) | |
520 | { | |
521 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
522 | ||
394349f7 LW |
523 | /* no-op when not using generic pin config */ |
524 | pinconf_generic_dump_group(pctldev, s, gname); | |
ae6b4d85 LW |
525 | if (ops && ops->pin_config_group_dbg_show) |
526 | ops->pin_config_group_dbg_show(pctldev, s, selector); | |
527 | } | |
528 | ||
529 | static int pinconf_groups_show(struct seq_file *s, void *what) | |
530 | { | |
531 | struct pinctrl_dev *pctldev = s->private; | |
532 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
533 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
d1e90e9e | 534 | unsigned ngroups = pctlops->get_groups_count(pctldev); |
ae6b4d85 LW |
535 | unsigned selector = 0; |
536 | ||
537 | if (!ops || !ops->pin_config_group_get) | |
538 | return 0; | |
539 | ||
540 | seq_puts(s, "Pin config settings per pin group\n"); | |
2aeefe02 | 541 | seq_puts(s, "Format: group (name): configs\n"); |
ae6b4d85 | 542 | |
d1e90e9e | 543 | while (selector < ngroups) { |
ae6b4d85 LW |
544 | const char *gname = pctlops->get_group_name(pctldev, selector); |
545 | ||
546 | seq_printf(s, "%u (%s):", selector, gname); | |
547 | pinconf_dump_group(pctldev, s, selector, gname); | |
f7b9006f SW |
548 | seq_printf(s, "\n"); |
549 | ||
ae6b4d85 LW |
550 | selector++; |
551 | } | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static int pinconf_pins_open(struct inode *inode, struct file *file) | |
557 | { | |
558 | return single_open(file, pinconf_pins_show, inode->i_private); | |
559 | } | |
560 | ||
561 | static int pinconf_groups_open(struct inode *inode, struct file *file) | |
562 | { | |
563 | return single_open(file, pinconf_groups_show, inode->i_private); | |
564 | } | |
565 | ||
566 | static const struct file_operations pinconf_pins_ops = { | |
567 | .open = pinconf_pins_open, | |
568 | .read = seq_read, | |
569 | .llseek = seq_lseek, | |
570 | .release = single_release, | |
571 | }; | |
572 | ||
573 | static const struct file_operations pinconf_groups_ops = { | |
574 | .open = pinconf_groups_open, | |
575 | .read = seq_read, | |
576 | .llseek = seq_lseek, | |
577 | .release = single_release, | |
578 | }; | |
579 | ||
f07512e6 LM |
580 | #define MAX_NAME_LEN 15 |
581 | ||
582 | struct dbg_cfg { | |
583 | enum pinctrl_map_type map_type; | |
584 | char dev_name[MAX_NAME_LEN+1]; | |
585 | char state_name[MAX_NAME_LEN+1]; | |
586 | char pin_name[MAX_NAME_LEN+1]; | |
587 | }; | |
588 | ||
589 | /* | |
590 | * Goal is to keep this structure as global in order to simply read the | |
591 | * pinconf-config file after a write to check config is as expected | |
592 | */ | |
593 | static struct dbg_cfg pinconf_dbg_conf; | |
594 | ||
595 | /** | |
596 | * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl | |
597 | * map, of the dev/pin/state that was last written to pinconf-config file. | |
598 | * @s: string filled in with config description | |
599 | * @d: not used | |
600 | */ | |
601 | static int pinconf_dbg_config_print(struct seq_file *s, void *d) | |
602 | { | |
603 | struct pinctrl_maps *maps_node; | |
604 | const struct pinctrl_map *map; | |
605 | struct pinctrl_dev *pctldev = NULL; | |
606 | const struct pinconf_ops *confops = NULL; | |
607 | const struct pinctrl_map_configs *configs; | |
608 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
609 | int i, j; | |
610 | bool found = false; | |
611 | unsigned long config; | |
612 | ||
42fed7ba | 613 | mutex_lock(&pctldev->mutex); |
f07512e6 LM |
614 | |
615 | /* Parse the pinctrl map and look for the elected pin/state */ | |
616 | for_each_maps(maps_node, i, map) { | |
617 | if (map->type != dbg->map_type) | |
618 | continue; | |
619 | if (strcmp(map->dev_name, dbg->dev_name)) | |
620 | continue; | |
621 | if (strcmp(map->name, dbg->state_name)) | |
622 | continue; | |
623 | ||
624 | for (j = 0; j < map->data.configs.num_configs; j++) { | |
625 | if (!strcmp(map->data.configs.group_or_pin, | |
626 | dbg->pin_name)) { | |
627 | /* | |
628 | * We found the right pin / state, read the | |
629 | * config and he pctldev for later use | |
630 | */ | |
631 | configs = &map->data.configs; | |
632 | pctldev = get_pinctrl_dev_from_devname | |
633 | (map->ctrl_dev_name); | |
634 | found = true; | |
635 | break; | |
636 | } | |
637 | } | |
638 | } | |
639 | ||
640 | if (!found) { | |
641 | seq_printf(s, "No config found for dev/state/pin, expected:\n"); | |
642 | seq_printf(s, "Searched dev:%s\n", dbg->dev_name); | |
643 | seq_printf(s, "Searched state:%s\n", dbg->state_name); | |
644 | seq_printf(s, "Searched pin:%s\n", dbg->pin_name); | |
645 | seq_printf(s, "Use: modify config_pin <devname> "\ | |
646 | "<state> <pinname> <value>\n"); | |
647 | goto exit; | |
648 | } | |
649 | ||
650 | config = *(configs->configs); | |
651 | seq_printf(s, "Dev %s has config of %s in state %s: 0x%08lX\n", | |
652 | dbg->dev_name, dbg->pin_name, | |
653 | dbg->state_name, config); | |
654 | ||
655 | if (pctldev) | |
656 | confops = pctldev->desc->confops; | |
657 | ||
658 | if (confops && confops->pin_config_config_dbg_show) | |
659 | confops->pin_config_config_dbg_show(pctldev, s, config); | |
660 | ||
661 | exit: | |
42fed7ba | 662 | mutex_unlock(&pctldev->mutex); |
f07512e6 LM |
663 | |
664 | return 0; | |
665 | } | |
666 | ||
667 | /** | |
668 | * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl | |
669 | * map, of a dev/pin/state entry based on user entries to pinconf-config | |
670 | * @user_buf: contains the modification request with expected format: | |
671 | * modify config_pin <devicename> <state> <pinname> <newvalue> | |
672 | * modify is literal string, alternatives like add/delete not supported yet | |
673 | * config_pin is literal, alternatives like config_mux not supported yet | |
674 | * <devicename> <state> <pinname> are values that should match the pinctrl-maps | |
675 | * <newvalue> reflects the new config and is driver dependant | |
676 | */ | |
677 | static int pinconf_dbg_config_write(struct file *file, | |
678 | const char __user *user_buf, size_t count, loff_t *ppos) | |
679 | { | |
680 | struct pinctrl_maps *maps_node; | |
681 | const struct pinctrl_map *map; | |
682 | struct pinctrl_dev *pctldev = NULL; | |
683 | const struct pinconf_ops *confops = NULL; | |
684 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
685 | const struct pinctrl_map_configs *configs; | |
686 | char config[MAX_NAME_LEN+1]; | |
687 | bool found = false; | |
688 | char buf[128]; | |
689 | char *b = &buf[0]; | |
690 | int buf_size; | |
691 | char *token; | |
692 | int i; | |
693 | ||
694 | /* Get userspace string and assure termination */ | |
695 | buf_size = min(count, (sizeof(buf)-1)); | |
696 | if (copy_from_user(buf, user_buf, buf_size)) | |
697 | return -EFAULT; | |
698 | buf[buf_size] = 0; | |
699 | ||
700 | /* | |
701 | * need to parse entry and extract parameters: | |
702 | * modify configs_pin devicename state pinname newvalue | |
703 | */ | |
704 | ||
705 | /* Get arg: 'modify' */ | |
706 | token = strsep(&b, " "); | |
707 | if (!token) | |
708 | return -EINVAL; | |
709 | if (strcmp(token, "modify")) | |
710 | return -EINVAL; | |
711 | ||
712 | /* Get arg type: "config_pin" type supported so far */ | |
713 | token = strsep(&b, " "); | |
714 | if (!token) | |
715 | return -EINVAL; | |
716 | if (strcmp(token, "config_pin")) | |
717 | return -EINVAL; | |
718 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN; | |
719 | ||
720 | /* get arg 'device_name' */ | |
721 | token = strsep(&b, " "); | |
722 | if (token == NULL) | |
723 | return -EINVAL; | |
724 | if (strlen(token) >= MAX_NAME_LEN) | |
725 | return -EINVAL; | |
726 | strncpy(dbg->dev_name, token, MAX_NAME_LEN); | |
727 | ||
728 | /* get arg 'state_name' */ | |
729 | token = strsep(&b, " "); | |
730 | if (token == NULL) | |
731 | return -EINVAL; | |
732 | if (strlen(token) >= MAX_NAME_LEN) | |
733 | return -EINVAL; | |
734 | strncpy(dbg->state_name, token, MAX_NAME_LEN); | |
735 | ||
736 | /* get arg 'pin_name' */ | |
737 | token = strsep(&b, " "); | |
738 | if (token == NULL) | |
739 | return -EINVAL; | |
740 | if (strlen(token) >= MAX_NAME_LEN) | |
741 | return -EINVAL; | |
742 | strncpy(dbg->pin_name, token, MAX_NAME_LEN); | |
743 | ||
744 | /* get new_value of config' */ | |
745 | token = strsep(&b, " "); | |
746 | if (token == NULL) | |
747 | return -EINVAL; | |
748 | if (strlen(token) >= MAX_NAME_LEN) | |
749 | return -EINVAL; | |
750 | strncpy(config, token, MAX_NAME_LEN); | |
751 | ||
42fed7ba | 752 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
753 | |
754 | /* Parse the pinctrl map and look for the selected dev/state/pin */ | |
755 | for_each_maps(maps_node, i, map) { | |
756 | if (strcmp(map->dev_name, dbg->dev_name)) | |
757 | continue; | |
758 | if (map->type != dbg->map_type) | |
759 | continue; | |
760 | if (strcmp(map->name, dbg->state_name)) | |
761 | continue; | |
762 | ||
763 | /* we found the right pin / state, so overwrite config */ | |
764 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { | |
765 | found = true; | |
766 | pctldev = get_pinctrl_dev_from_devname( | |
767 | map->ctrl_dev_name); | |
768 | configs = &map->data.configs; | |
769 | break; | |
770 | } | |
771 | } | |
772 | ||
773 | if (!found) { | |
f07512e6 | 774 | count = -EINVAL; |
cb6d315d | 775 | goto exit; |
f07512e6 LM |
776 | } |
777 | ||
778 | if (pctldev) | |
779 | confops = pctldev->desc->confops; | |
780 | ||
781 | if (confops && confops->pin_config_dbg_parse_modify) { | |
782 | for (i = 0; i < configs->num_configs; i++) { | |
783 | confops->pin_config_dbg_parse_modify(pctldev, | |
784 | config, | |
785 | &configs->configs[i]); | |
786 | } | |
787 | } | |
788 | ||
789 | exit: | |
42fed7ba | 790 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
791 | |
792 | return count; | |
793 | } | |
794 | ||
795 | static int pinconf_dbg_config_open(struct inode *inode, struct file *file) | |
796 | { | |
797 | return single_open(file, pinconf_dbg_config_print, inode->i_private); | |
798 | } | |
799 | ||
800 | static const struct file_operations pinconf_dbg_pinconfig_fops = { | |
801 | .open = pinconf_dbg_config_open, | |
802 | .write = pinconf_dbg_config_write, | |
803 | .read = seq_read, | |
804 | .llseek = seq_lseek, | |
805 | .release = single_release, | |
806 | .owner = THIS_MODULE, | |
807 | }; | |
808 | ||
ae6b4d85 LW |
809 | void pinconf_init_device_debugfs(struct dentry *devroot, |
810 | struct pinctrl_dev *pctldev) | |
811 | { | |
812 | debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO, | |
813 | devroot, pctldev, &pinconf_pins_ops); | |
814 | debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO, | |
815 | devroot, pctldev, &pinconf_groups_ops); | |
f07512e6 LM |
816 | debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP), |
817 | devroot, pctldev, &pinconf_dbg_pinconfig_fops); | |
ae6b4d85 LW |
818 | } |
819 | ||
820 | #endif |