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ff764963 KVA |
1 | /* |
2 | * phy-core.c -- Generic Phy framework. | |
3 | * | |
4 | * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com | |
5 | * | |
6 | * Author: Kishon Vijay Abraham I <kishon@ti.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/export.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/of.h> | |
21 | #include <linux/phy/phy.h> | |
22 | #include <linux/idr.h> | |
23 | #include <linux/pm_runtime.h> | |
3be88125 | 24 | #include <linux/regulator/consumer.h> |
ff764963 KVA |
25 | |
26 | static struct class *phy_class; | |
27 | static DEFINE_MUTEX(phy_provider_mutex); | |
28 | static LIST_HEAD(phy_provider_list); | |
b7bc15b9 | 29 | static LIST_HEAD(phys); |
ff764963 KVA |
30 | static DEFINE_IDA(phy_ida); |
31 | ||
32 | static void devm_phy_release(struct device *dev, void *res) | |
33 | { | |
34 | struct phy *phy = *(struct phy **)res; | |
35 | ||
36 | phy_put(phy); | |
37 | } | |
38 | ||
39 | static void devm_phy_provider_release(struct device *dev, void *res) | |
40 | { | |
41 | struct phy_provider *phy_provider = *(struct phy_provider **)res; | |
42 | ||
43 | of_phy_provider_unregister(phy_provider); | |
44 | } | |
45 | ||
46 | static void devm_phy_consume(struct device *dev, void *res) | |
47 | { | |
48 | struct phy *phy = *(struct phy **)res; | |
49 | ||
50 | phy_destroy(phy); | |
51 | } | |
52 | ||
53 | static int devm_phy_match(struct device *dev, void *res, void *match_data) | |
54 | { | |
2f1bce48 TR |
55 | struct phy **phy = res; |
56 | ||
57 | return *phy == match_data; | |
ff764963 KVA |
58 | } |
59 | ||
b7bc15b9 HK |
60 | /** |
61 | * phy_create_lookup() - allocate and register PHY/device association | |
62 | * @phy: the phy of the association | |
63 | * @con_id: connection ID string on device | |
64 | * @dev_id: the device of the association | |
65 | * | |
66 | * Creates and registers phy_lookup entry. | |
67 | */ | |
68 | int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id) | |
69 | { | |
70 | struct phy_lookup *pl; | |
71 | ||
72 | if (!phy || !dev_id || !con_id) | |
73 | return -EINVAL; | |
74 | ||
75 | pl = kzalloc(sizeof(*pl), GFP_KERNEL); | |
76 | if (!pl) | |
77 | return -ENOMEM; | |
78 | ||
79 | pl->dev_id = dev_id; | |
80 | pl->con_id = con_id; | |
81 | pl->phy = phy; | |
82 | ||
83 | mutex_lock(&phy_provider_mutex); | |
84 | list_add_tail(&pl->node, &phys); | |
85 | mutex_unlock(&phy_provider_mutex); | |
86 | ||
87 | return 0; | |
88 | } | |
89 | EXPORT_SYMBOL_GPL(phy_create_lookup); | |
90 | ||
91 | /** | |
92 | * phy_remove_lookup() - find and remove PHY/device association | |
93 | * @phy: the phy of the association | |
94 | * @con_id: connection ID string on device | |
95 | * @dev_id: the device of the association | |
96 | * | |
97 | * Finds and unregisters phy_lookup entry that was created with | |
98 | * phy_create_lookup(). | |
99 | */ | |
100 | void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id) | |
101 | { | |
102 | struct phy_lookup *pl; | |
103 | ||
104 | if (!phy || !dev_id || !con_id) | |
105 | return; | |
106 | ||
107 | mutex_lock(&phy_provider_mutex); | |
108 | list_for_each_entry(pl, &phys, node) | |
109 | if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) && | |
110 | !strcmp(pl->con_id, con_id)) { | |
111 | list_del(&pl->node); | |
112 | kfree(pl); | |
113 | break; | |
114 | } | |
115 | mutex_unlock(&phy_provider_mutex); | |
116 | } | |
117 | EXPORT_SYMBOL_GPL(phy_remove_lookup); | |
118 | ||
119 | static struct phy *phy_find(struct device *dev, const char *con_id) | |
120 | { | |
121 | const char *dev_id = dev_name(dev); | |
122 | struct phy_lookup *p, *pl = NULL; | |
b7bc15b9 HK |
123 | |
124 | mutex_lock(&phy_provider_mutex); | |
125 | list_for_each_entry(p, &phys, node) | |
126 | if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) { | |
127 | pl = p; | |
128 | break; | |
129 | } | |
130 | mutex_unlock(&phy_provider_mutex); | |
131 | ||
dbc98635 | 132 | return pl ? pl->phy : ERR_PTR(-ENODEV); |
b7bc15b9 HK |
133 | } |
134 | ||
ff764963 KVA |
135 | static struct phy_provider *of_phy_provider_lookup(struct device_node *node) |
136 | { | |
137 | struct phy_provider *phy_provider; | |
2a4c3701 | 138 | struct device_node *child; |
ff764963 KVA |
139 | |
140 | list_for_each_entry(phy_provider, &phy_provider_list, list) { | |
141 | if (phy_provider->dev->of_node == node) | |
142 | return phy_provider; | |
2a4c3701 KVA |
143 | |
144 | for_each_child_of_node(phy_provider->dev->of_node, child) | |
145 | if (child == node) | |
146 | return phy_provider; | |
ff764963 KVA |
147 | } |
148 | ||
149 | return ERR_PTR(-EPROBE_DEFER); | |
150 | } | |
151 | ||
152 | int phy_pm_runtime_get(struct phy *phy) | |
153 | { | |
cedb7f89 FB |
154 | int ret; |
155 | ||
ff764963 KVA |
156 | if (!pm_runtime_enabled(&phy->dev)) |
157 | return -ENOTSUPP; | |
158 | ||
cedb7f89 FB |
159 | ret = pm_runtime_get(&phy->dev); |
160 | if (ret < 0 && ret != -EINPROGRESS) | |
161 | pm_runtime_put_noidle(&phy->dev); | |
162 | ||
163 | return ret; | |
ff764963 KVA |
164 | } |
165 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get); | |
166 | ||
167 | int phy_pm_runtime_get_sync(struct phy *phy) | |
168 | { | |
cedb7f89 FB |
169 | int ret; |
170 | ||
ff764963 KVA |
171 | if (!pm_runtime_enabled(&phy->dev)) |
172 | return -ENOTSUPP; | |
173 | ||
cedb7f89 FB |
174 | ret = pm_runtime_get_sync(&phy->dev); |
175 | if (ret < 0) | |
176 | pm_runtime_put_sync(&phy->dev); | |
177 | ||
178 | return ret; | |
ff764963 KVA |
179 | } |
180 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync); | |
181 | ||
182 | int phy_pm_runtime_put(struct phy *phy) | |
183 | { | |
184 | if (!pm_runtime_enabled(&phy->dev)) | |
185 | return -ENOTSUPP; | |
186 | ||
187 | return pm_runtime_put(&phy->dev); | |
188 | } | |
189 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put); | |
190 | ||
191 | int phy_pm_runtime_put_sync(struct phy *phy) | |
192 | { | |
193 | if (!pm_runtime_enabled(&phy->dev)) | |
194 | return -ENOTSUPP; | |
195 | ||
196 | return pm_runtime_put_sync(&phy->dev); | |
197 | } | |
198 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync); | |
199 | ||
200 | void phy_pm_runtime_allow(struct phy *phy) | |
201 | { | |
202 | if (!pm_runtime_enabled(&phy->dev)) | |
203 | return; | |
204 | ||
205 | pm_runtime_allow(&phy->dev); | |
206 | } | |
207 | EXPORT_SYMBOL_GPL(phy_pm_runtime_allow); | |
208 | ||
209 | void phy_pm_runtime_forbid(struct phy *phy) | |
210 | { | |
211 | if (!pm_runtime_enabled(&phy->dev)) | |
212 | return; | |
213 | ||
214 | pm_runtime_forbid(&phy->dev); | |
215 | } | |
216 | EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid); | |
217 | ||
218 | int phy_init(struct phy *phy) | |
219 | { | |
220 | int ret; | |
221 | ||
04c2faca AL |
222 | if (!phy) |
223 | return 0; | |
224 | ||
ff764963 KVA |
225 | ret = phy_pm_runtime_get_sync(phy); |
226 | if (ret < 0 && ret != -ENOTSUPP) | |
227 | return ret; | |
736b67a3 | 228 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
ff764963 KVA |
229 | |
230 | mutex_lock(&phy->mutex); | |
637d378c | 231 | if (phy->init_count == 0 && phy->ops->init) { |
ff764963 KVA |
232 | ret = phy->ops->init(phy); |
233 | if (ret < 0) { | |
234 | dev_err(&phy->dev, "phy init failed --> %d\n", ret); | |
235 | goto out; | |
236 | } | |
237 | } | |
637d378c | 238 | ++phy->init_count; |
ff764963 KVA |
239 | |
240 | out: | |
241 | mutex_unlock(&phy->mutex); | |
242 | phy_pm_runtime_put(phy); | |
243 | return ret; | |
244 | } | |
245 | EXPORT_SYMBOL_GPL(phy_init); | |
246 | ||
247 | int phy_exit(struct phy *phy) | |
248 | { | |
249 | int ret; | |
250 | ||
04c2faca AL |
251 | if (!phy) |
252 | return 0; | |
253 | ||
ff764963 KVA |
254 | ret = phy_pm_runtime_get_sync(phy); |
255 | if (ret < 0 && ret != -ENOTSUPP) | |
256 | return ret; | |
736b67a3 | 257 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
ff764963 KVA |
258 | |
259 | mutex_lock(&phy->mutex); | |
637d378c | 260 | if (phy->init_count == 1 && phy->ops->exit) { |
ff764963 KVA |
261 | ret = phy->ops->exit(phy); |
262 | if (ret < 0) { | |
263 | dev_err(&phy->dev, "phy exit failed --> %d\n", ret); | |
264 | goto out; | |
265 | } | |
266 | } | |
637d378c | 267 | --phy->init_count; |
ff764963 KVA |
268 | |
269 | out: | |
270 | mutex_unlock(&phy->mutex); | |
271 | phy_pm_runtime_put(phy); | |
272 | return ret; | |
273 | } | |
274 | EXPORT_SYMBOL_GPL(phy_exit); | |
275 | ||
276 | int phy_power_on(struct phy *phy) | |
277 | { | |
d18c9604 | 278 | int ret; |
ff764963 | 279 | |
04c2faca AL |
280 | if (!phy) |
281 | return 0; | |
282 | ||
3be88125 RQ |
283 | if (phy->pwr) { |
284 | ret = regulator_enable(phy->pwr); | |
285 | if (ret) | |
286 | return ret; | |
287 | } | |
288 | ||
ff764963 KVA |
289 | ret = phy_pm_runtime_get_sync(phy); |
290 | if (ret < 0 && ret != -ENOTSUPP) | |
291 | return ret; | |
736b67a3 | 292 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
ff764963 KVA |
293 | |
294 | mutex_lock(&phy->mutex); | |
637d378c | 295 | if (phy->power_count == 0 && phy->ops->power_on) { |
ff764963 KVA |
296 | ret = phy->ops->power_on(phy); |
297 | if (ret < 0) { | |
298 | dev_err(&phy->dev, "phy poweron failed --> %d\n", ret); | |
299 | goto out; | |
300 | } | |
301 | } | |
637d378c KVA |
302 | ++phy->power_count; |
303 | mutex_unlock(&phy->mutex); | |
304 | return 0; | |
ff764963 KVA |
305 | |
306 | out: | |
307 | mutex_unlock(&phy->mutex); | |
637d378c | 308 | phy_pm_runtime_put_sync(phy); |
3be88125 RQ |
309 | if (phy->pwr) |
310 | regulator_disable(phy->pwr); | |
ff764963 KVA |
311 | |
312 | return ret; | |
313 | } | |
314 | EXPORT_SYMBOL_GPL(phy_power_on); | |
315 | ||
316 | int phy_power_off(struct phy *phy) | |
317 | { | |
d18c9604 | 318 | int ret; |
ff764963 | 319 | |
04c2faca AL |
320 | if (!phy) |
321 | return 0; | |
322 | ||
ff764963 | 323 | mutex_lock(&phy->mutex); |
637d378c | 324 | if (phy->power_count == 1 && phy->ops->power_off) { |
ff764963 KVA |
325 | ret = phy->ops->power_off(phy); |
326 | if (ret < 0) { | |
327 | dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret); | |
637d378c KVA |
328 | mutex_unlock(&phy->mutex); |
329 | return ret; | |
ff764963 KVA |
330 | } |
331 | } | |
637d378c | 332 | --phy->power_count; |
ff764963 KVA |
333 | mutex_unlock(&phy->mutex); |
334 | phy_pm_runtime_put(phy); | |
335 | ||
3be88125 RQ |
336 | if (phy->pwr) |
337 | regulator_disable(phy->pwr); | |
338 | ||
637d378c | 339 | return 0; |
ff764963 KVA |
340 | } |
341 | EXPORT_SYMBOL_GPL(phy_power_off); | |
342 | ||
343 | /** | |
0b3f3b2c KD |
344 | * _of_phy_get() - lookup and obtain a reference to a phy by phandle |
345 | * @np: device_node for which to get the phy | |
ff764963 KVA |
346 | * @index: the index of the phy |
347 | * | |
348 | * Returns the phy associated with the given phandle value, | |
349 | * after getting a refcount to it or -ENODEV if there is no such phy or | |
350 | * -EPROBE_DEFER if there is a phandle to the phy, but the device is | |
351 | * not yet loaded. This function uses of_xlate call back function provided | |
352 | * while registering the phy_provider to find the phy instance. | |
353 | */ | |
0b3f3b2c | 354 | static struct phy *_of_phy_get(struct device_node *np, int index) |
ff764963 KVA |
355 | { |
356 | int ret; | |
357 | struct phy_provider *phy_provider; | |
358 | struct phy *phy = NULL; | |
359 | struct of_phandle_args args; | |
360 | ||
0b3f3b2c | 361 | ret = of_parse_phandle_with_args(np, "phys", "#phy-cells", |
ff764963 | 362 | index, &args); |
0b3f3b2c | 363 | if (ret) |
ff764963 | 364 | return ERR_PTR(-ENODEV); |
ff764963 KVA |
365 | |
366 | mutex_lock(&phy_provider_mutex); | |
367 | phy_provider = of_phy_provider_lookup(args.np); | |
368 | if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) { | |
369 | phy = ERR_PTR(-EPROBE_DEFER); | |
33f434d2 AL |
370 | goto out_unlock; |
371 | } | |
372 | ||
373 | if (!of_device_is_available(args.np)) { | |
374 | dev_warn(phy_provider->dev, "Requested PHY is disabled\n"); | |
375 | phy = ERR_PTR(-ENODEV); | |
376 | goto out_put_module; | |
ff764963 KVA |
377 | } |
378 | ||
379 | phy = phy_provider->of_xlate(phy_provider->dev, &args); | |
33f434d2 AL |
380 | |
381 | out_put_module: | |
ff764963 KVA |
382 | module_put(phy_provider->owner); |
383 | ||
33f434d2 | 384 | out_unlock: |
ff764963 KVA |
385 | mutex_unlock(&phy_provider_mutex); |
386 | of_node_put(args.np); | |
387 | ||
388 | return phy; | |
389 | } | |
390 | ||
0b3f3b2c KD |
391 | /** |
392 | * of_phy_get() - lookup and obtain a reference to a phy using a device_node. | |
393 | * @np: device_node for which to get the phy | |
394 | * @con_id: name of the phy from device's point of view | |
395 | * | |
396 | * Returns the phy driver, after getting a refcount to it; or | |
397 | * -ENODEV if there is no such phy. The caller is responsible for | |
398 | * calling phy_put() to release that count. | |
399 | */ | |
400 | struct phy *of_phy_get(struct device_node *np, const char *con_id) | |
401 | { | |
402 | struct phy *phy = NULL; | |
403 | int index = 0; | |
404 | ||
405 | if (con_id) | |
406 | index = of_property_match_string(np, "phy-names", con_id); | |
407 | ||
408 | phy = _of_phy_get(np, index); | |
409 | if (IS_ERR(phy)) | |
410 | return phy; | |
411 | ||
412 | if (!try_module_get(phy->ops->owner)) | |
413 | return ERR_PTR(-EPROBE_DEFER); | |
414 | ||
415 | get_device(&phy->dev); | |
416 | ||
417 | return phy; | |
418 | } | |
419 | EXPORT_SYMBOL_GPL(of_phy_get); | |
420 | ||
ff764963 KVA |
421 | /** |
422 | * phy_put() - release the PHY | |
423 | * @phy: the phy returned by phy_get() | |
424 | * | |
425 | * Releases a refcount the caller received from phy_get(). | |
426 | */ | |
427 | void phy_put(struct phy *phy) | |
428 | { | |
04c2faca | 429 | if (!phy || IS_ERR(phy)) |
ff764963 KVA |
430 | return; |
431 | ||
432 | module_put(phy->ops->owner); | |
433 | put_device(&phy->dev); | |
434 | } | |
435 | EXPORT_SYMBOL_GPL(phy_put); | |
436 | ||
437 | /** | |
438 | * devm_phy_put() - release the PHY | |
439 | * @dev: device that wants to release this phy | |
440 | * @phy: the phy returned by devm_phy_get() | |
441 | * | |
442 | * destroys the devres associated with this phy and invokes phy_put | |
443 | * to release the phy. | |
444 | */ | |
445 | void devm_phy_put(struct device *dev, struct phy *phy) | |
446 | { | |
447 | int r; | |
448 | ||
04c2faca AL |
449 | if (!phy) |
450 | return; | |
451 | ||
ff764963 KVA |
452 | r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy); |
453 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
454 | } | |
455 | EXPORT_SYMBOL_GPL(devm_phy_put); | |
456 | ||
457 | /** | |
458 | * of_phy_simple_xlate() - returns the phy instance from phy provider | |
459 | * @dev: the PHY provider device | |
460 | * @args: of_phandle_args (not used here) | |
461 | * | |
462 | * Intended to be used by phy provider for the common case where #phy-cells is | |
463 | * 0. For other cases where #phy-cells is greater than '0', the phy provider | |
464 | * should provide a custom of_xlate function that reads the *args* and returns | |
465 | * the appropriate phy. | |
466 | */ | |
467 | struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args | |
468 | *args) | |
469 | { | |
470 | struct phy *phy; | |
471 | struct class_dev_iter iter; | |
ff764963 KVA |
472 | |
473 | class_dev_iter_init(&iter, phy_class, NULL, NULL); | |
474 | while ((dev = class_dev_iter_next(&iter))) { | |
475 | phy = to_phy(dev); | |
491e0490 | 476 | if (args->np != phy->dev.of_node) |
ff764963 KVA |
477 | continue; |
478 | ||
479 | class_dev_iter_exit(&iter); | |
480 | return phy; | |
481 | } | |
482 | ||
483 | class_dev_iter_exit(&iter); | |
484 | return ERR_PTR(-ENODEV); | |
485 | } | |
486 | EXPORT_SYMBOL_GPL(of_phy_simple_xlate); | |
487 | ||
488 | /** | |
489 | * phy_get() - lookup and obtain a reference to a phy. | |
490 | * @dev: device that requests this phy | |
491 | * @string: the phy name as given in the dt data or the name of the controller | |
492 | * port for non-dt case | |
493 | * | |
494 | * Returns the phy driver, after getting a refcount to it; or | |
495 | * -ENODEV if there is no such phy. The caller is responsible for | |
496 | * calling phy_put() to release that count. | |
497 | */ | |
498 | struct phy *phy_get(struct device *dev, const char *string) | |
499 | { | |
500 | int index = 0; | |
d18c9604 | 501 | struct phy *phy; |
ff764963 KVA |
502 | |
503 | if (string == NULL) { | |
504 | dev_WARN(dev, "missing string\n"); | |
505 | return ERR_PTR(-EINVAL); | |
506 | } | |
507 | ||
508 | if (dev->of_node) { | |
509 | index = of_property_match_string(dev->of_node, "phy-names", | |
510 | string); | |
0b3f3b2c | 511 | phy = _of_phy_get(dev->of_node, index); |
ff764963 | 512 | } else { |
b7bc15b9 | 513 | phy = phy_find(dev, string); |
ff764963 | 514 | } |
f40037fd HG |
515 | if (IS_ERR(phy)) |
516 | return phy; | |
ff764963 KVA |
517 | |
518 | if (!try_module_get(phy->ops->owner)) | |
519 | return ERR_PTR(-EPROBE_DEFER); | |
520 | ||
521 | get_device(&phy->dev); | |
522 | ||
523 | return phy; | |
524 | } | |
525 | EXPORT_SYMBOL_GPL(phy_get); | |
526 | ||
788a4d56 AL |
527 | /** |
528 | * phy_optional_get() - lookup and obtain a reference to an optional phy. | |
529 | * @dev: device that requests this phy | |
530 | * @string: the phy name as given in the dt data or the name of the controller | |
531 | * port for non-dt case | |
532 | * | |
533 | * Returns the phy driver, after getting a refcount to it; or | |
534 | * NULL if there is no such phy. The caller is responsible for | |
535 | * calling phy_put() to release that count. | |
536 | */ | |
537 | struct phy *phy_optional_get(struct device *dev, const char *string) | |
538 | { | |
539 | struct phy *phy = phy_get(dev, string); | |
540 | ||
f83be4c3 | 541 | if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV)) |
788a4d56 AL |
542 | phy = NULL; |
543 | ||
544 | return phy; | |
545 | } | |
546 | EXPORT_SYMBOL_GPL(phy_optional_get); | |
547 | ||
ff764963 KVA |
548 | /** |
549 | * devm_phy_get() - lookup and obtain a reference to a phy. | |
550 | * @dev: device that requests this phy | |
551 | * @string: the phy name as given in the dt data or phy device name | |
552 | * for non-dt case | |
553 | * | |
554 | * Gets the phy using phy_get(), and associates a device with it using | |
555 | * devres. On driver detach, release function is invoked on the devres data, | |
556 | * then, devres data is freed. | |
557 | */ | |
558 | struct phy *devm_phy_get(struct device *dev, const char *string) | |
559 | { | |
560 | struct phy **ptr, *phy; | |
561 | ||
562 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
563 | if (!ptr) | |
564 | return ERR_PTR(-ENOMEM); | |
565 | ||
566 | phy = phy_get(dev, string); | |
567 | if (!IS_ERR(phy)) { | |
568 | *ptr = phy; | |
569 | devres_add(dev, ptr); | |
570 | } else { | |
571 | devres_free(ptr); | |
572 | } | |
573 | ||
574 | return phy; | |
575 | } | |
576 | EXPORT_SYMBOL_GPL(devm_phy_get); | |
577 | ||
788a4d56 AL |
578 | /** |
579 | * devm_phy_optional_get() - lookup and obtain a reference to an optional phy. | |
580 | * @dev: device that requests this phy | |
581 | * @string: the phy name as given in the dt data or phy device name | |
582 | * for non-dt case | |
583 | * | |
584 | * Gets the phy using phy_get(), and associates a device with it using | |
585 | * devres. On driver detach, release function is invoked on the devres | |
586 | * data, then, devres data is freed. This differs to devm_phy_get() in | |
587 | * that if the phy does not exist, it is not considered an error and | |
588 | * -ENODEV will not be returned. Instead the NULL phy is returned, | |
589 | * which can be passed to all other phy consumer calls. | |
590 | */ | |
591 | struct phy *devm_phy_optional_get(struct device *dev, const char *string) | |
592 | { | |
593 | struct phy *phy = devm_phy_get(dev, string); | |
594 | ||
f83be4c3 | 595 | if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV)) |
788a4d56 AL |
596 | phy = NULL; |
597 | ||
598 | return phy; | |
599 | } | |
600 | EXPORT_SYMBOL_GPL(devm_phy_optional_get); | |
601 | ||
b5d682f4 KD |
602 | /** |
603 | * devm_of_phy_get() - lookup and obtain a reference to a phy. | |
604 | * @dev: device that requests this phy | |
605 | * @np: node containing the phy | |
606 | * @con_id: name of the phy from device's point of view | |
607 | * | |
608 | * Gets the phy using of_phy_get(), and associates a device with it using | |
609 | * devres. On driver detach, release function is invoked on the devres data, | |
610 | * then, devres data is freed. | |
611 | */ | |
612 | struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, | |
613 | const char *con_id) | |
614 | { | |
615 | struct phy **ptr, *phy; | |
616 | ||
617 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
618 | if (!ptr) | |
619 | return ERR_PTR(-ENOMEM); | |
620 | ||
621 | phy = of_phy_get(np, con_id); | |
622 | if (!IS_ERR(phy)) { | |
623 | *ptr = phy; | |
624 | devres_add(dev, ptr); | |
625 | } else { | |
626 | devres_free(ptr); | |
627 | } | |
628 | ||
629 | return phy; | |
630 | } | |
631 | EXPORT_SYMBOL_GPL(devm_of_phy_get); | |
632 | ||
6be109b3 AR |
633 | /** |
634 | * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index. | |
635 | * @dev: device that requests this phy | |
636 | * @np: node containing the phy | |
637 | * @index: index of the phy | |
638 | * | |
639 | * Gets the phy using _of_phy_get(), and associates a device with it using | |
640 | * devres. On driver detach, release function is invoked on the devres data, | |
641 | * then, devres data is freed. | |
642 | * | |
643 | */ | |
644 | struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np, | |
645 | int index) | |
646 | { | |
647 | struct phy **ptr, *phy; | |
648 | ||
649 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); | |
650 | if (!ptr) | |
651 | return ERR_PTR(-ENOMEM); | |
652 | ||
653 | phy = _of_phy_get(np, index); | |
654 | if (!IS_ERR(phy)) { | |
655 | *ptr = phy; | |
656 | devres_add(dev, ptr); | |
657 | } else { | |
658 | devres_free(ptr); | |
659 | } | |
660 | ||
661 | return phy; | |
662 | } | |
663 | EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index); | |
664 | ||
ff764963 KVA |
665 | /** |
666 | * phy_create() - create a new phy | |
667 | * @dev: device that is creating the new phy | |
f0ed8176 | 668 | * @node: device node of the phy |
ff764963 | 669 | * @ops: function pointers for performing phy operations |
ff764963 KVA |
670 | * |
671 | * Called to create a phy using phy framework. | |
672 | */ | |
f0ed8176 | 673 | struct phy *phy_create(struct device *dev, struct device_node *node, |
dbc98635 | 674 | const struct phy_ops *ops) |
ff764963 KVA |
675 | { |
676 | int ret; | |
677 | int id; | |
678 | struct phy *phy; | |
679 | ||
52797d29 DC |
680 | if (WARN_ON(!dev)) |
681 | return ERR_PTR(-EINVAL); | |
ff764963 KVA |
682 | |
683 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); | |
52797d29 DC |
684 | if (!phy) |
685 | return ERR_PTR(-ENOMEM); | |
ff764963 KVA |
686 | |
687 | id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL); | |
688 | if (id < 0) { | |
689 | dev_err(dev, "unable to get id\n"); | |
690 | ret = id; | |
52797d29 | 691 | goto free_phy; |
ff764963 KVA |
692 | } |
693 | ||
694 | device_initialize(&phy->dev); | |
695 | mutex_init(&phy->mutex); | |
696 | ||
697 | phy->dev.class = phy_class; | |
698 | phy->dev.parent = dev; | |
f0ed8176 | 699 | phy->dev.of_node = node ?: dev->of_node; |
ff764963 KVA |
700 | phy->id = id; |
701 | phy->ops = ops; | |
ff764963 KVA |
702 | |
703 | ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id); | |
704 | if (ret) | |
52797d29 | 705 | goto put_dev; |
ff764963 | 706 | |
87006dd6 DT |
707 | /* phy-supply */ |
708 | phy->pwr = regulator_get_optional(&phy->dev, "phy"); | |
709 | if (IS_ERR(phy->pwr)) { | |
710 | ret = PTR_ERR(phy->pwr); | |
711 | if (ret == -EPROBE_DEFER) | |
712 | goto put_dev; | |
713 | ||
714 | phy->pwr = NULL; | |
715 | } | |
716 | ||
ff764963 KVA |
717 | ret = device_add(&phy->dev); |
718 | if (ret) | |
52797d29 | 719 | goto put_dev; |
ff764963 KVA |
720 | |
721 | if (pm_runtime_enabled(dev)) { | |
722 | pm_runtime_enable(&phy->dev); | |
723 | pm_runtime_no_callbacks(&phy->dev); | |
724 | } | |
725 | ||
726 | return phy; | |
727 | ||
52797d29 | 728 | put_dev: |
e73b49f1 RQ |
729 | put_device(&phy->dev); /* calls phy_release() which frees resources */ |
730 | return ERR_PTR(ret); | |
731 | ||
52797d29 | 732 | free_phy: |
ff764963 | 733 | kfree(phy); |
ff764963 KVA |
734 | return ERR_PTR(ret); |
735 | } | |
736 | EXPORT_SYMBOL_GPL(phy_create); | |
737 | ||
738 | /** | |
739 | * devm_phy_create() - create a new phy | |
740 | * @dev: device that is creating the new phy | |
f0ed8176 | 741 | * @node: device node of the phy |
ff764963 | 742 | * @ops: function pointers for performing phy operations |
ff764963 KVA |
743 | * |
744 | * Creates a new PHY device adding it to the PHY class. | |
745 | * While at that, it also associates the device with the phy using devres. | |
746 | * On driver detach, release function is invoked on the devres data, | |
747 | * then, devres data is freed. | |
748 | */ | |
f0ed8176 | 749 | struct phy *devm_phy_create(struct device *dev, struct device_node *node, |
dbc98635 | 750 | const struct phy_ops *ops) |
ff764963 KVA |
751 | { |
752 | struct phy **ptr, *phy; | |
753 | ||
754 | ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL); | |
755 | if (!ptr) | |
756 | return ERR_PTR(-ENOMEM); | |
757 | ||
dbc98635 | 758 | phy = phy_create(dev, node, ops); |
ff764963 KVA |
759 | if (!IS_ERR(phy)) { |
760 | *ptr = phy; | |
761 | devres_add(dev, ptr); | |
762 | } else { | |
763 | devres_free(ptr); | |
764 | } | |
765 | ||
766 | return phy; | |
767 | } | |
768 | EXPORT_SYMBOL_GPL(devm_phy_create); | |
769 | ||
770 | /** | |
771 | * phy_destroy() - destroy the phy | |
772 | * @phy: the phy to be destroyed | |
773 | * | |
774 | * Called to destroy the phy. | |
775 | */ | |
776 | void phy_destroy(struct phy *phy) | |
777 | { | |
778 | pm_runtime_disable(&phy->dev); | |
779 | device_unregister(&phy->dev); | |
780 | } | |
781 | EXPORT_SYMBOL_GPL(phy_destroy); | |
782 | ||
783 | /** | |
784 | * devm_phy_destroy() - destroy the PHY | |
785 | * @dev: device that wants to release this phy | |
786 | * @phy: the phy returned by devm_phy_get() | |
787 | * | |
788 | * destroys the devres associated with this phy and invokes phy_destroy | |
789 | * to destroy the phy. | |
790 | */ | |
791 | void devm_phy_destroy(struct device *dev, struct phy *phy) | |
792 | { | |
793 | int r; | |
794 | ||
795 | r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy); | |
796 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); | |
797 | } | |
798 | EXPORT_SYMBOL_GPL(devm_phy_destroy); | |
799 | ||
800 | /** | |
801 | * __of_phy_provider_register() - create/register phy provider with the framework | |
802 | * @dev: struct device of the phy provider | |
803 | * @owner: the module owner containing of_xlate | |
804 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
805 | * | |
806 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
807 | * This is used in the case of dt boot for finding the phy instance from | |
808 | * phy provider. | |
809 | */ | |
810 | struct phy_provider *__of_phy_provider_register(struct device *dev, | |
811 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, | |
812 | struct of_phandle_args *args)) | |
813 | { | |
814 | struct phy_provider *phy_provider; | |
815 | ||
816 | phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL); | |
817 | if (!phy_provider) | |
818 | return ERR_PTR(-ENOMEM); | |
819 | ||
820 | phy_provider->dev = dev; | |
821 | phy_provider->owner = owner; | |
822 | phy_provider->of_xlate = of_xlate; | |
823 | ||
824 | mutex_lock(&phy_provider_mutex); | |
825 | list_add_tail(&phy_provider->list, &phy_provider_list); | |
826 | mutex_unlock(&phy_provider_mutex); | |
827 | ||
828 | return phy_provider; | |
829 | } | |
830 | EXPORT_SYMBOL_GPL(__of_phy_provider_register); | |
831 | ||
832 | /** | |
833 | * __devm_of_phy_provider_register() - create/register phy provider with the | |
834 | * framework | |
835 | * @dev: struct device of the phy provider | |
836 | * @owner: the module owner containing of_xlate | |
837 | * @of_xlate: function pointer to obtain phy instance from phy provider | |
838 | * | |
839 | * Creates struct phy_provider from dev and of_xlate function pointer. | |
840 | * This is used in the case of dt boot for finding the phy instance from | |
841 | * phy provider. While at that, it also associates the device with the | |
842 | * phy provider using devres. On driver detach, release function is invoked | |
843 | * on the devres data, then, devres data is freed. | |
844 | */ | |
845 | struct phy_provider *__devm_of_phy_provider_register(struct device *dev, | |
846 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, | |
847 | struct of_phandle_args *args)) | |
848 | { | |
849 | struct phy_provider **ptr, *phy_provider; | |
850 | ||
851 | ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL); | |
852 | if (!ptr) | |
853 | return ERR_PTR(-ENOMEM); | |
854 | ||
855 | phy_provider = __of_phy_provider_register(dev, owner, of_xlate); | |
856 | if (!IS_ERR(phy_provider)) { | |
857 | *ptr = phy_provider; | |
858 | devres_add(dev, ptr); | |
859 | } else { | |
860 | devres_free(ptr); | |
861 | } | |
862 | ||
863 | return phy_provider; | |
864 | } | |
865 | EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register); | |
866 | ||
867 | /** | |
868 | * of_phy_provider_unregister() - unregister phy provider from the framework | |
869 | * @phy_provider: phy provider returned by of_phy_provider_register() | |
870 | * | |
871 | * Removes the phy_provider created using of_phy_provider_register(). | |
872 | */ | |
873 | void of_phy_provider_unregister(struct phy_provider *phy_provider) | |
874 | { | |
875 | if (IS_ERR(phy_provider)) | |
876 | return; | |
877 | ||
878 | mutex_lock(&phy_provider_mutex); | |
879 | list_del(&phy_provider->list); | |
880 | kfree(phy_provider); | |
881 | mutex_unlock(&phy_provider_mutex); | |
882 | } | |
883 | EXPORT_SYMBOL_GPL(of_phy_provider_unregister); | |
884 | ||
885 | /** | |
886 | * devm_of_phy_provider_unregister() - remove phy provider from the framework | |
887 | * @dev: struct device of the phy provider | |
888 | * | |
889 | * destroys the devres associated with this phy provider and invokes | |
890 | * of_phy_provider_unregister to unregister the phy provider. | |
891 | */ | |
892 | void devm_of_phy_provider_unregister(struct device *dev, | |
893 | struct phy_provider *phy_provider) { | |
894 | int r; | |
895 | ||
896 | r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match, | |
897 | phy_provider); | |
898 | dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n"); | |
899 | } | |
900 | EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister); | |
901 | ||
902 | /** | |
903 | * phy_release() - release the phy | |
904 | * @dev: the dev member within phy | |
905 | * | |
906 | * When the last reference to the device is removed, it is called | |
907 | * from the embedded kobject as release method. | |
908 | */ | |
909 | static void phy_release(struct device *dev) | |
910 | { | |
911 | struct phy *phy; | |
912 | ||
913 | phy = to_phy(dev); | |
914 | dev_vdbg(dev, "releasing '%s'\n", dev_name(dev)); | |
3be88125 | 915 | regulator_put(phy->pwr); |
e73b49f1 | 916 | ida_simple_remove(&phy_ida, phy->id); |
ff764963 KVA |
917 | kfree(phy); |
918 | } | |
919 | ||
920 | static int __init phy_core_init(void) | |
921 | { | |
922 | phy_class = class_create(THIS_MODULE, "phy"); | |
923 | if (IS_ERR(phy_class)) { | |
924 | pr_err("failed to create phy class --> %ld\n", | |
925 | PTR_ERR(phy_class)); | |
926 | return PTR_ERR(phy_class); | |
927 | } | |
928 | ||
929 | phy_class->dev_release = phy_release; | |
930 | ||
931 | return 0; | |
932 | } | |
933 | module_init(phy_core_init); | |
934 | ||
935 | static void __exit phy_core_exit(void) | |
936 | { | |
937 | class_destroy(phy_class); | |
938 | } | |
939 | module_exit(phy_core_exit); | |
940 | ||
941 | MODULE_DESCRIPTION("Generic PHY Framework"); | |
942 | MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>"); | |
943 | MODULE_LICENSE("GPL v2"); |