Commit | Line | Data |
---|---|---|
de55d871 | 1 | /* |
b9ec23c0 | 2 | * drivers/extcon/extcon.c - External Connector (extcon) framework. |
de55d871 MH |
3 | * |
4 | * External connector (extcon) class driver | |
5 | * | |
2a9de9c0 CC |
6 | * Copyright (C) 2015 Samsung Electronics |
7 | * Author: Chanwoo Choi <cw00.choi@samsung.com> | |
8 | * | |
de55d871 MH |
9 | * Copyright (C) 2012 Samsung Electronics |
10 | * Author: Donggeun Kim <dg77.kim@samsung.com> | |
11 | * Author: MyungJoo Ham <myungjoo.ham@samsung.com> | |
12 | * | |
13 | * based on android/drivers/switch/switch_class.c | |
14 | * Copyright (C) 2008 Google, Inc. | |
15 | * Author: Mike Lockwood <lockwood@android.com> | |
16 | * | |
17 | * This software is licensed under the terms of the GNU General Public | |
18 | * License version 2, as published by the Free Software Foundation, and | |
19 | * may be copied, distributed, and modified under those terms. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
b9ec23c0 | 25 | */ |
de55d871 MH |
26 | |
27 | #include <linux/module.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/device.h> | |
31 | #include <linux/fs.h> | |
32 | #include <linux/err.h> | |
f841afb1 | 33 | #include <linux/of.h> |
de55d871 | 34 | #include <linux/slab.h> |
9baf3220 | 35 | #include <linux/sysfs.h> |
de55d871 | 36 | |
e6cf0465 CC |
37 | #include "extcon.h" |
38 | ||
2a9de9c0 CC |
39 | #define SUPPORTED_CABLE_MAX 32 |
40 | #define CABLE_NAME_MAX 30 | |
41 | ||
55e4e2f1 CC |
42 | struct __extcon_info { |
43 | unsigned int type; | |
44 | unsigned int id; | |
45 | const char *name; | |
46 | ||
47 | } extcon_info[] = { | |
48 | [EXTCON_NONE] = { | |
49 | .type = EXTCON_TYPE_MISC, | |
50 | .id = EXTCON_NONE, | |
51 | .name = "NONE", | |
52 | }, | |
73b6ecdb | 53 | |
8e9bc36d | 54 | /* USB external connector */ |
55e4e2f1 CC |
55 | [EXTCON_USB] = { |
56 | .type = EXTCON_TYPE_USB, | |
57 | .id = EXTCON_USB, | |
58 | .name = "USB", | |
59 | }, | |
60 | [EXTCON_USB_HOST] = { | |
61 | .type = EXTCON_TYPE_USB, | |
62 | .id = EXTCON_USB_HOST, | |
63 | .name = "USB_HOST", | |
64 | }, | |
8e9bc36d | 65 | |
11eecf91 | 66 | /* Charging external connector */ |
55e4e2f1 CC |
67 | [EXTCON_CHG_USB_SDP] = { |
68 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, | |
69 | .id = EXTCON_CHG_USB_SDP, | |
70 | .name = "SDP", | |
71 | }, | |
72 | [EXTCON_CHG_USB_DCP] = { | |
73 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, | |
74 | .id = EXTCON_CHG_USB_DCP, | |
75 | .name = "DCP", | |
76 | }, | |
77 | [EXTCON_CHG_USB_CDP] = { | |
78 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, | |
79 | .id = EXTCON_CHG_USB_CDP, | |
80 | .name = "CDP", | |
81 | }, | |
82 | [EXTCON_CHG_USB_ACA] = { | |
83 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, | |
84 | .id = EXTCON_CHG_USB_ACA, | |
85 | .name = "ACA", | |
86 | }, | |
87 | [EXTCON_CHG_USB_FAST] = { | |
88 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, | |
89 | .id = EXTCON_CHG_USB_FAST, | |
90 | .name = "FAST-CHARGER", | |
91 | }, | |
92 | [EXTCON_CHG_USB_SLOW] = { | |
93 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, | |
94 | .id = EXTCON_CHG_USB_SLOW, | |
95 | .name = "SLOW-CHARGER", | |
96 | }, | |
7fe95fb8 CC |
97 | [EXTCON_CHG_WPT] = { |
98 | .type = EXTCON_TYPE_CHG, | |
99 | .id = EXTCON_CHG_WPT, | |
100 | .name = "WPT", | |
101 | }, | |
8e9bc36d | 102 | |
11eecf91 | 103 | /* Jack external connector */ |
55e4e2f1 CC |
104 | [EXTCON_JACK_MICROPHONE] = { |
105 | .type = EXTCON_TYPE_JACK, | |
106 | .id = EXTCON_JACK_MICROPHONE, | |
107 | .name = "MICROPHONE", | |
108 | }, | |
109 | [EXTCON_JACK_HEADPHONE] = { | |
110 | .type = EXTCON_TYPE_JACK, | |
111 | .id = EXTCON_JACK_HEADPHONE, | |
112 | .name = "HEADPHONE", | |
113 | }, | |
114 | [EXTCON_JACK_LINE_IN] = { | |
115 | .type = EXTCON_TYPE_JACK, | |
116 | .id = EXTCON_JACK_LINE_IN, | |
117 | .name = "LINE-IN", | |
118 | }, | |
119 | [EXTCON_JACK_LINE_OUT] = { | |
120 | .type = EXTCON_TYPE_JACK, | |
121 | .id = EXTCON_JACK_LINE_OUT, | |
122 | .name = "LINE-OUT", | |
123 | }, | |
124 | [EXTCON_JACK_VIDEO_IN] = { | |
125 | .type = EXTCON_TYPE_JACK, | |
126 | .id = EXTCON_JACK_VIDEO_IN, | |
127 | .name = "VIDEO-IN", | |
128 | }, | |
129 | [EXTCON_JACK_VIDEO_OUT] = { | |
130 | .type = EXTCON_TYPE_JACK, | |
131 | .id = EXTCON_JACK_VIDEO_OUT, | |
132 | .name = "VIDEO-OUT", | |
133 | }, | |
134 | [EXTCON_JACK_SPDIF_IN] = { | |
135 | .type = EXTCON_TYPE_JACK, | |
136 | .id = EXTCON_JACK_SPDIF_IN, | |
137 | .name = "SPDIF-IN", | |
138 | }, | |
139 | [EXTCON_JACK_SPDIF_OUT] = { | |
140 | .type = EXTCON_TYPE_JACK, | |
141 | .id = EXTCON_JACK_SPDIF_OUT, | |
142 | .name = "SPDIF-OUT", | |
143 | }, | |
8e9bc36d | 144 | |
11eecf91 | 145 | /* Display external connector */ |
55e4e2f1 CC |
146 | [EXTCON_DISP_HDMI] = { |
147 | .type = EXTCON_TYPE_DISP, | |
148 | .id = EXTCON_DISP_HDMI, | |
149 | .name = "HDMI", | |
150 | }, | |
151 | [EXTCON_DISP_MHL] = { | |
152 | .type = EXTCON_TYPE_DISP, | |
153 | .id = EXTCON_DISP_MHL, | |
154 | .name = "MHL", | |
155 | }, | |
156 | [EXTCON_DISP_DVI] = { | |
157 | .type = EXTCON_TYPE_DISP, | |
158 | .id = EXTCON_DISP_DVI, | |
159 | .name = "DVI", | |
160 | }, | |
161 | [EXTCON_DISP_VGA] = { | |
162 | .type = EXTCON_TYPE_DISP, | |
163 | .id = EXTCON_DISP_VGA, | |
164 | .name = "VGA", | |
165 | }, | |
2164188d CZ |
166 | [EXTCON_DISP_DP] = { |
167 | .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, | |
168 | .id = EXTCON_DISP_DP, | |
169 | .name = "DP", | |
170 | }, | |
9c0595d6 CC |
171 | [EXTCON_DISP_HMD] = { |
172 | .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, | |
173 | .id = EXTCON_DISP_HMD, | |
174 | .name = "HMD", | |
175 | }, | |
8e9bc36d | 176 | |
11eecf91 | 177 | /* Miscellaneous external connector */ |
55e4e2f1 CC |
178 | [EXTCON_DOCK] = { |
179 | .type = EXTCON_TYPE_MISC, | |
180 | .id = EXTCON_DOCK, | |
181 | .name = "DOCK", | |
182 | }, | |
183 | [EXTCON_JIG] = { | |
184 | .type = EXTCON_TYPE_MISC, | |
185 | .id = EXTCON_JIG, | |
186 | .name = "JIG", | |
187 | }, | |
188 | [EXTCON_MECHANICAL] = { | |
189 | .type = EXTCON_TYPE_MISC, | |
190 | .id = EXTCON_MECHANICAL, | |
191 | .name = "MECHANICAL", | |
192 | }, | |
193 | ||
194 | { /* sentinel */ } | |
806d9dd7 MH |
195 | }; |
196 | ||
20f7b53d CC |
197 | /** |
198 | * struct extcon_cable - An internal data for each cable of extcon device. | |
199 | * @edev: The extcon device | |
200 | * @cable_index: Index of this cable in the edev | |
201 | * @attr_g: Attribute group for the cable | |
202 | * @attr_name: "name" sysfs entry | |
203 | * @attr_state: "state" sysfs entry | |
204 | * @attrs: Array pointing to attr_name and attr_state for attr_g | |
205 | */ | |
206 | struct extcon_cable { | |
207 | struct extcon_dev *edev; | |
208 | int cable_index; | |
209 | ||
210 | struct attribute_group attr_g; | |
211 | struct device_attribute attr_name; | |
212 | struct device_attribute attr_state; | |
213 | ||
214 | struct attribute *attrs[3]; /* to be fed to attr_g.attrs */ | |
792e7e9e CC |
215 | |
216 | union extcon_property_value usb_propval[EXTCON_PROP_USB_CNT]; | |
217 | union extcon_property_value chg_propval[EXTCON_PROP_CHG_CNT]; | |
218 | union extcon_property_value jack_propval[EXTCON_PROP_JACK_CNT]; | |
219 | union extcon_property_value disp_propval[EXTCON_PROP_DISP_CNT]; | |
7f2a0a16 CC |
220 | |
221 | unsigned long usb_bits[BITS_TO_LONGS(EXTCON_PROP_USB_CNT)]; | |
222 | unsigned long chg_bits[BITS_TO_LONGS(EXTCON_PROP_CHG_CNT)]; | |
223 | unsigned long jack_bits[BITS_TO_LONGS(EXTCON_PROP_JACK_CNT)]; | |
224 | unsigned long disp_bits[BITS_TO_LONGS(EXTCON_PROP_DISP_CNT)]; | |
20f7b53d CC |
225 | }; |
226 | ||
be3a07f7 | 227 | static struct class *extcon_class; |
449a2bf5 | 228 | #if defined(CONFIG_ANDROID) |
de55d871 | 229 | static struct class_compat *switch_class; |
449a2bf5 | 230 | #endif /* CONFIG_ANDROID */ |
de55d871 | 231 | |
74c5d09b DK |
232 | static LIST_HEAD(extcon_dev_list); |
233 | static DEFINE_MUTEX(extcon_dev_list_lock); | |
234 | ||
bde68e60 MH |
235 | /** |
236 | * check_mutually_exclusive - Check if new_state violates mutually_exclusive | |
a75e1c73 | 237 | * condition. |
bde68e60 MH |
238 | * @edev: the extcon device |
239 | * @new_state: new cable attach status for @edev | |
240 | * | |
241 | * Returns 0 if nothing violates. Returns the index + 1 for the first | |
242 | * violated condition. | |
243 | */ | |
244 | static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state) | |
245 | { | |
246 | int i = 0; | |
247 | ||
248 | if (!edev->mutually_exclusive) | |
249 | return 0; | |
250 | ||
251 | for (i = 0; edev->mutually_exclusive[i]; i++) { | |
28c0ada6 | 252 | int weight; |
bde68e60 | 253 | u32 correspondants = new_state & edev->mutually_exclusive[i]; |
bde68e60 | 254 | |
28c0ada6 | 255 | /* calculate the total number of bits set */ |
256 | weight = hweight32(correspondants); | |
257 | if (weight > 1) | |
258 | return i + 1; | |
bde68e60 MH |
259 | } |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
73b6ecdb | 264 | static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id) |
2a9de9c0 CC |
265 | { |
266 | int i; | |
267 | ||
268 | /* Find the the index of extcon cable in edev->supported_cable */ | |
269 | for (i = 0; i < edev->max_supported; i++) { | |
270 | if (edev->supported_cable[i] == id) | |
271 | return i; | |
272 | } | |
273 | ||
274 | return -EINVAL; | |
275 | } | |
276 | ||
792e7e9e CC |
277 | static int get_extcon_type(unsigned int prop) |
278 | { | |
279 | switch (prop) { | |
280 | case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: | |
281 | return EXTCON_TYPE_USB; | |
282 | case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: | |
283 | return EXTCON_TYPE_CHG; | |
284 | case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: | |
285 | return EXTCON_TYPE_JACK; | |
286 | case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: | |
287 | return EXTCON_TYPE_DISP; | |
288 | default: | |
289 | return -EINVAL; | |
290 | } | |
291 | } | |
292 | ||
293 | static bool is_extcon_attached(struct extcon_dev *edev, unsigned int index) | |
294 | { | |
295 | return !!(edev->state & BIT(index)); | |
296 | } | |
297 | ||
ab11af04 CC |
298 | static bool is_extcon_changed(struct extcon_dev *edev, int index, |
299 | bool new_state) | |
046050f6 | 300 | { |
ab11af04 CC |
301 | int state = !!(edev->state & BIT(index)); |
302 | return (state != new_state); | |
046050f6 CC |
303 | } |
304 | ||
792e7e9e CC |
305 | static bool is_extcon_property_supported(unsigned int id, unsigned int prop) |
306 | { | |
307 | int type; | |
308 | ||
309 | /* Check whether the property is supported or not. */ | |
310 | type = get_extcon_type(prop); | |
311 | if (type < 0) | |
312 | return false; | |
313 | ||
314 | /* Check whether a specific extcon id supports the property or not. */ | |
315 | return !!(extcon_info[id].type & type); | |
316 | } | |
317 | ||
7f2a0a16 CC |
318 | static int is_extcon_property_capability(struct extcon_dev *edev, |
319 | unsigned int id, int index,unsigned int prop) | |
320 | { | |
321 | struct extcon_cable *cable; | |
322 | int type, ret; | |
323 | ||
324 | /* Check whether the property is supported or not. */ | |
325 | type = get_extcon_type(prop); | |
326 | if (type < 0) | |
327 | return type; | |
328 | ||
329 | cable = &edev->cables[index]; | |
330 | ||
331 | switch (type) { | |
332 | case EXTCON_TYPE_USB: | |
333 | ret = test_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); | |
334 | break; | |
335 | case EXTCON_TYPE_CHG: | |
336 | ret = test_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); | |
337 | break; | |
338 | case EXTCON_TYPE_JACK: | |
339 | ret = test_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); | |
340 | break; | |
341 | case EXTCON_TYPE_DISP: | |
342 | ret = test_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); | |
343 | break; | |
344 | default: | |
345 | ret = -EINVAL; | |
346 | } | |
347 | ||
348 | return ret; | |
349 | } | |
350 | ||
792e7e9e CC |
351 | static void init_property(struct extcon_dev *edev, unsigned int id, int index) |
352 | { | |
353 | unsigned int type = extcon_info[id].type; | |
354 | struct extcon_cable *cable = &edev->cables[index]; | |
355 | ||
356 | if (EXTCON_TYPE_USB & type) | |
357 | memset(cable->usb_propval, 0, sizeof(cable->usb_propval)); | |
358 | if (EXTCON_TYPE_CHG & type) | |
359 | memset(cable->chg_propval, 0, sizeof(cable->chg_propval)); | |
360 | if (EXTCON_TYPE_JACK & type) | |
361 | memset(cable->jack_propval, 0, sizeof(cable->jack_propval)); | |
362 | if (EXTCON_TYPE_DISP & type) | |
363 | memset(cable->disp_propval, 0, sizeof(cable->disp_propval)); | |
364 | } | |
365 | ||
de55d871 MH |
366 | static ssize_t state_show(struct device *dev, struct device_attribute *attr, |
367 | char *buf) | |
368 | { | |
806d9dd7 | 369 | int i, count = 0; |
cb8bb3a7 | 370 | struct extcon_dev *edev = dev_get_drvdata(dev); |
de55d871 | 371 | |
806d9dd7 MH |
372 | if (edev->max_supported == 0) |
373 | return sprintf(buf, "%u\n", edev->state); | |
374 | ||
2a9de9c0 | 375 | for (i = 0; i < edev->max_supported; i++) { |
806d9dd7 | 376 | count += sprintf(buf + count, "%s=%d\n", |
55e4e2f1 | 377 | extcon_info[edev->supported_cable[i]].name, |
806d9dd7 MH |
378 | !!(edev->state & (1 << i))); |
379 | } | |
380 | ||
381 | return count; | |
382 | } | |
5d5321e9 | 383 | static DEVICE_ATTR_RO(state); |
de55d871 MH |
384 | |
385 | static ssize_t name_show(struct device *dev, struct device_attribute *attr, | |
386 | char *buf) | |
387 | { | |
cb8bb3a7 | 388 | struct extcon_dev *edev = dev_get_drvdata(dev); |
de55d871 | 389 | |
71c3ffa5 | 390 | return sprintf(buf, "%s\n", edev->name); |
de55d871 | 391 | } |
af01da0e | 392 | static DEVICE_ATTR_RO(name); |
de55d871 | 393 | |
806d9dd7 MH |
394 | static ssize_t cable_name_show(struct device *dev, |
395 | struct device_attribute *attr, char *buf) | |
396 | { | |
397 | struct extcon_cable *cable = container_of(attr, struct extcon_cable, | |
398 | attr_name); | |
2a9de9c0 | 399 | int i = cable->cable_index; |
806d9dd7 MH |
400 | |
401 | return sprintf(buf, "%s\n", | |
55e4e2f1 | 402 | extcon_info[cable->edev->supported_cable[i]].name); |
806d9dd7 MH |
403 | } |
404 | ||
405 | static ssize_t cable_state_show(struct device *dev, | |
406 | struct device_attribute *attr, char *buf) | |
407 | { | |
408 | struct extcon_cable *cable = container_of(attr, struct extcon_cable, | |
409 | attr_state); | |
410 | ||
be052cc8 RQ |
411 | int i = cable->cable_index; |
412 | ||
806d9dd7 | 413 | return sprintf(buf, "%d\n", |
575c2b86 | 414 | extcon_get_state(cable->edev, cable->edev->supported_cable[i])); |
806d9dd7 MH |
415 | } |
416 | ||
de55d871 | 417 | /** |
ab11af04 CC |
418 | * extcon_sync() - Synchronize the states for both the attached/detached |
419 | * @edev: the extcon device that has the cable. | |
74c5d09b | 420 | * |
ab11af04 CC |
421 | * This function send a notification to synchronize the all states of a |
422 | * specific external connector | |
de55d871 | 423 | */ |
ab11af04 | 424 | int extcon_sync(struct extcon_dev *edev, unsigned int id) |
de55d871 MH |
425 | { |
426 | char name_buf[120]; | |
427 | char state_buf[120]; | |
428 | char *prop_buf; | |
429 | char *envp[3]; | |
430 | int env_offset = 0; | |
431 | int length; | |
046050f6 | 432 | int index; |
ab11af04 | 433 | int state; |
806d9dd7 | 434 | unsigned long flags; |
de55d871 | 435 | |
7eae43ae CC |
436 | if (!edev) |
437 | return -EINVAL; | |
438 | ||
ab11af04 CC |
439 | index = find_cable_index_by_id(edev, id); |
440 | if (index < 0) | |
441 | return index; | |
442 | ||
806d9dd7 | 443 | spin_lock_irqsave(&edev->lock, flags); |
de55d871 | 444 | |
ab11af04 CC |
445 | state = !!(edev->state & BIT(index)); |
446 | raw_notifier_call_chain(&edev->nh[index], state, edev); | |
447 | ||
448 | /* This could be in interrupt handler */ | |
449 | prop_buf = (char *)get_zeroed_page(GFP_ATOMIC); | |
450 | if (!prop_buf) { | |
451 | /* Unlock early before uevent */ | |
806d9dd7 | 452 | spin_unlock_irqrestore(&edev->lock, flags); |
ab11af04 CC |
453 | |
454 | dev_err(&edev->dev, "out of memory in extcon_set_state\n"); | |
455 | kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE); | |
456 | ||
e7d9dd5a | 457 | return -ENOMEM; |
ab11af04 CC |
458 | } |
459 | ||
460 | length = name_show(&edev->dev, NULL, prop_buf); | |
461 | if (length > 0) { | |
462 | if (prop_buf[length - 1] == '\n') | |
463 | prop_buf[length - 1] = 0; | |
464 | snprintf(name_buf, sizeof(name_buf), "NAME=%s", prop_buf); | |
465 | envp[env_offset++] = name_buf; | |
466 | } | |
467 | ||
468 | length = state_show(&edev->dev, NULL, prop_buf); | |
469 | if (length > 0) { | |
470 | if (prop_buf[length - 1] == '\n') | |
471 | prop_buf[length - 1] = 0; | |
472 | snprintf(state_buf, sizeof(state_buf), "STATE=%s", prop_buf); | |
473 | envp[env_offset++] = state_buf; | |
de55d871 | 474 | } |
ab11af04 CC |
475 | envp[env_offset] = NULL; |
476 | ||
477 | /* Unlock early before uevent */ | |
478 | spin_unlock_irqrestore(&edev->lock, flags); | |
479 | kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp); | |
480 | free_page((unsigned long)prop_buf); | |
bde68e60 MH |
481 | |
482 | return 0; | |
de55d871 | 483 | } |
ab11af04 | 484 | EXPORT_SYMBOL_GPL(extcon_sync); |
de55d871 | 485 | |
806d9dd7 | 486 | /** |
575c2b86 | 487 | * extcon_get_state() - Get the state of a external connector. |
806d9dd7 | 488 | * @edev: the extcon device that has the cable. |
2a9de9c0 | 489 | * @id: the unique id of each external connector in extcon enumeration. |
806d9dd7 | 490 | */ |
575c2b86 | 491 | int extcon_get_state(struct extcon_dev *edev, const unsigned int id) |
806d9dd7 | 492 | { |
575c2b86 CC |
493 | int index, state; |
494 | unsigned long flags; | |
806d9dd7 | 495 | |
7eae43ae CC |
496 | if (!edev) |
497 | return -EINVAL; | |
498 | ||
2a9de9c0 CC |
499 | index = find_cable_index_by_id(edev, id); |
500 | if (index < 0) | |
501 | return index; | |
806d9dd7 | 502 | |
575c2b86 CC |
503 | spin_lock_irqsave(&edev->lock, flags); |
504 | state = is_extcon_attached(edev, index); | |
505 | spin_unlock_irqrestore(&edev->lock, flags); | |
806d9dd7 | 506 | |
575c2b86 | 507 | return state; |
806d9dd7 | 508 | } |
575c2b86 | 509 | EXPORT_SYMBOL_GPL(extcon_get_state); |
806d9dd7 | 510 | |
806d9dd7 | 511 | /** |
575c2b86 | 512 | * extcon_set_state() - Set the state of a external connector. |
ab11af04 | 513 | * without a notification. |
a75e1c73 | 514 | * @edev: the extcon device that has the cable. |
2a9de9c0 CC |
515 | * @id: the unique id of each external connector |
516 | * in extcon enumeration. | |
517 | * @state: the new cable status. The default semantics is | |
806d9dd7 | 518 | * true: attached / false: detached. |
ab11af04 CC |
519 | * |
520 | * This function only set the state of a external connector without | |
521 | * a notification. To synchronize the data of a external connector, | |
522 | * use extcon_set_state_sync() and extcon_sync(). | |
806d9dd7 | 523 | */ |
575c2b86 | 524 | int extcon_set_state(struct extcon_dev *edev, unsigned int id, |
2a9de9c0 | 525 | bool cable_state) |
806d9dd7 | 526 | { |
ab11af04 CC |
527 | unsigned long flags; |
528 | int index, ret = 0; | |
806d9dd7 | 529 | |
7eae43ae CC |
530 | if (!edev) |
531 | return -EINVAL; | |
532 | ||
2a9de9c0 CC |
533 | index = find_cable_index_by_id(edev, id); |
534 | if (index < 0) | |
535 | return index; | |
536 | ||
ab11af04 CC |
537 | spin_lock_irqsave(&edev->lock, flags); |
538 | ||
539 | /* Check whether the external connector's state is changed. */ | |
540 | if (!is_extcon_changed(edev, index, cable_state)) | |
541 | goto out; | |
542 | ||
543 | if (check_mutually_exclusive(edev, | |
544 | (edev->state & ~BIT(index)) | (cable_state & BIT(index)))) { | |
545 | ret = -EPERM; | |
546 | goto out; | |
547 | } | |
548 | ||
792e7e9e CC |
549 | /* |
550 | * Initialize the value of extcon property before setting | |
551 | * the detached state for an external connector. | |
552 | */ | |
553 | if (!cable_state) | |
554 | init_property(edev, id, index); | |
555 | ||
ab11af04 CC |
556 | /* Update the state for a external connector. */ |
557 | if (cable_state) | |
558 | edev->state |= BIT(index); | |
559 | else | |
560 | edev->state &= ~(BIT(index)); | |
561 | out: | |
562 | spin_unlock_irqrestore(&edev->lock, flags); | |
563 | ||
564 | return ret; | |
806d9dd7 | 565 | } |
575c2b86 | 566 | EXPORT_SYMBOL_GPL(extcon_set_state); |
806d9dd7 | 567 | |
ab11af04 CC |
568 | /** |
569 | * extcon_set_state_sync() - Set the state of a external connector | |
570 | * with a notification. | |
571 | * @edev: the extcon device that has the cable. | |
572 | * @id: the unique id of each external connector | |
573 | * in extcon enumeration. | |
574 | * @state: the new cable status. The default semantics is | |
575 | * true: attached / false: detached. | |
576 | * | |
577 | * This function set the state of external connector and synchronize the data | |
578 | * by usning a notification. | |
579 | */ | |
580 | int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, | |
581 | bool cable_state) | |
582 | { | |
583 | int ret, index; | |
584 | unsigned long flags; | |
585 | ||
586 | index = find_cable_index_by_id(edev, id); | |
587 | if (index < 0) | |
588 | return index; | |
589 | ||
590 | /* Check whether the external connector's state is changed. */ | |
591 | spin_lock_irqsave(&edev->lock, flags); | |
592 | ret = is_extcon_changed(edev, index, cable_state); | |
593 | spin_unlock_irqrestore(&edev->lock, flags); | |
594 | if (!ret) | |
595 | return 0; | |
596 | ||
597 | ret = extcon_set_state(edev, id, cable_state); | |
598 | if (ret < 0) | |
599 | return ret; | |
600 | ||
601 | return extcon_sync(edev, id); | |
602 | } | |
603 | EXPORT_SYMBOL_GPL(extcon_set_state_sync); | |
604 | ||
792e7e9e CC |
605 | /** |
606 | * extcon_get_property() - Get the property value of a specific cable. | |
607 | * @edev: the extcon device that has the cable. | |
608 | * @id: the unique id of each external connector | |
609 | * in extcon enumeration. | |
610 | * @prop: the property id among enum extcon_property. | |
611 | * @prop_val: the pointer which store the value of property. | |
612 | * | |
613 | * When getting the property value of external connector, the external connector | |
614 | * should be attached. If detached state, function just return 0 without | |
615 | * property value. Also, the each property should be included in the list of | |
616 | * supported properties according to the type of external connectors. | |
617 | * | |
618 | * Returns 0 if success or error number if fail | |
619 | */ | |
620 | int extcon_get_property(struct extcon_dev *edev, unsigned int id, | |
621 | unsigned int prop, | |
622 | union extcon_property_value *prop_val) | |
623 | { | |
624 | struct extcon_cable *cable; | |
625 | unsigned long flags; | |
626 | int index, ret = 0; | |
627 | ||
628 | *prop_val = (union extcon_property_value)(0); | |
629 | ||
630 | if (!edev) | |
631 | return -EINVAL; | |
632 | ||
633 | /* Check whether the property is supported or not */ | |
634 | if (!is_extcon_property_supported(id, prop)) | |
635 | return -EINVAL; | |
636 | ||
637 | /* Find the cable index of external connector by using id */ | |
638 | index = find_cable_index_by_id(edev, id); | |
639 | if (index < 0) | |
640 | return index; | |
641 | ||
642 | spin_lock_irqsave(&edev->lock, flags); | |
643 | ||
7f2a0a16 CC |
644 | /* Check whether the property is available or not. */ |
645 | if (!is_extcon_property_capability(edev, id, index, prop)) { | |
646 | spin_unlock_irqrestore(&edev->lock, flags); | |
647 | return -EPERM; | |
648 | } | |
649 | ||
792e7e9e CC |
650 | /* |
651 | * Check whether the external connector is attached. | |
652 | * If external connector is detached, the user can not | |
653 | * get the property value. | |
654 | */ | |
655 | if (!is_extcon_attached(edev, index)) { | |
656 | spin_unlock_irqrestore(&edev->lock, flags); | |
657 | return 0; | |
658 | } | |
659 | ||
660 | cable = &edev->cables[index]; | |
661 | ||
662 | /* Get the property value according to extcon type */ | |
663 | switch (prop) { | |
664 | case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: | |
665 | *prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN]; | |
666 | break; | |
667 | case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: | |
668 | *prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN]; | |
669 | break; | |
670 | case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: | |
671 | *prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN]; | |
672 | break; | |
673 | case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: | |
674 | *prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN]; | |
675 | break; | |
676 | default: | |
677 | ret = -EINVAL; | |
678 | break; | |
679 | } | |
680 | ||
681 | spin_unlock_irqrestore(&edev->lock, flags); | |
682 | ||
683 | return ret; | |
684 | } | |
685 | EXPORT_SYMBOL_GPL(extcon_get_property); | |
686 | ||
687 | /** | |
688 | * extcon_set_property() - Set the property value of a specific cable. | |
689 | * @edev: the extcon device that has the cable. | |
690 | * @id: the unique id of each external connector | |
691 | * in extcon enumeration. | |
692 | * @prop: the property id among enum extcon_property. | |
693 | * @prop_val: the pointer including the new value of property. | |
694 | * | |
695 | * The each property should be included in the list of supported properties | |
696 | * according to the type of external connectors. | |
697 | * | |
698 | * Returns 0 if success or error number if fail | |
699 | */ | |
700 | int extcon_set_property(struct extcon_dev *edev, unsigned int id, | |
701 | unsigned int prop, | |
702 | union extcon_property_value prop_val) | |
703 | { | |
704 | struct extcon_cable *cable; | |
705 | unsigned long flags; | |
706 | int index, ret = 0; | |
707 | ||
708 | if (!edev) | |
709 | return -EINVAL; | |
710 | ||
711 | /* Check whether the property is supported or not */ | |
712 | if (!is_extcon_property_supported(id, prop)) | |
713 | return -EINVAL; | |
714 | ||
715 | /* Find the cable index of external connector by using id */ | |
716 | index = find_cable_index_by_id(edev, id); | |
717 | if (index < 0) | |
718 | return index; | |
719 | ||
720 | spin_lock_irqsave(&edev->lock, flags); | |
721 | ||
7f2a0a16 CC |
722 | /* Check whether the property is available or not. */ |
723 | if (!is_extcon_property_capability(edev, id, index, prop)) { | |
724 | spin_unlock_irqrestore(&edev->lock, flags); | |
725 | return -EPERM; | |
726 | } | |
727 | ||
792e7e9e CC |
728 | cable = &edev->cables[index]; |
729 | ||
730 | /* Set the property value according to extcon type */ | |
731 | switch (prop) { | |
732 | case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: | |
733 | cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val; | |
734 | break; | |
735 | case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: | |
736 | cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val; | |
737 | break; | |
738 | case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: | |
739 | cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val; | |
740 | break; | |
741 | case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: | |
742 | cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val; | |
743 | break; | |
744 | default: | |
745 | ret = -EINVAL; | |
746 | break; | |
747 | } | |
748 | ||
749 | spin_unlock_irqrestore(&edev->lock, flags); | |
750 | ||
751 | return ret; | |
752 | } | |
753 | EXPORT_SYMBOL_GPL(extcon_set_property); | |
754 | ||
ab11af04 CC |
755 | /** |
756 | * extcon_set_property_sync() - Set the property value of a specific cable | |
757 | with a notification. | |
758 | * @prop_val: the pointer including the new value of property. | |
759 | * | |
760 | * When setting the property value of external connector, the external connector | |
761 | * should be attached. The each property should be included in the list of | |
762 | * supported properties according to the type of external connectors. | |
763 | * | |
764 | * Returns 0 if success or error number if fail | |
765 | */ | |
766 | int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id, | |
767 | unsigned int prop, | |
768 | union extcon_property_value prop_val) | |
769 | { | |
770 | int ret; | |
771 | ||
772 | ret = extcon_set_property(edev, id, prop, prop_val); | |
773 | if (ret < 0) | |
774 | return ret; | |
775 | ||
776 | return extcon_sync(edev, id); | |
777 | } | |
778 | EXPORT_SYMBOL_GPL(extcon_set_property_sync); | |
779 | ||
7f2a0a16 CC |
780 | /** |
781 | * extcon_get_property_capability() - Get the capability of property | |
782 | * of an external connector. | |
783 | * @edev: the extcon device that has the cable. | |
784 | * @id: the unique id of each external connector | |
785 | * in extcon enumeration. | |
786 | * @prop: the property id among enum extcon_property. | |
787 | * | |
788 | * Returns 1 if the property is available or 0 if not available. | |
789 | */ | |
790 | int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id, | |
791 | unsigned int prop) | |
792 | { | |
793 | int index; | |
794 | ||
795 | if (!edev) | |
796 | return -EINVAL; | |
797 | ||
798 | /* Check whether the property is supported or not */ | |
799 | if (!is_extcon_property_supported(id, prop)) | |
800 | return -EINVAL; | |
801 | ||
802 | /* Find the cable index of external connector by using id */ | |
803 | index = find_cable_index_by_id(edev, id); | |
804 | if (index < 0) | |
805 | return index; | |
806 | ||
807 | return is_extcon_property_capability(edev, id, index, prop); | |
808 | } | |
809 | EXPORT_SYMBOL_GPL(extcon_get_property_capability); | |
810 | ||
811 | /** | |
812 | * extcon_set_property_capability() - Set the capability of a property | |
813 | * of an external connector. | |
814 | * @edev: the extcon device that has the cable. | |
815 | * @id: the unique id of each external connector | |
816 | * in extcon enumeration. | |
817 | * @prop: the property id among enum extcon_property. | |
818 | * | |
819 | * This function set the capability of a property for an external connector | |
820 | * to mark the bit in capability bitmap which mean the available state of | |
821 | * a property. | |
822 | * | |
823 | * Returns 0 if success or error number if fail | |
824 | */ | |
825 | int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id, | |
826 | unsigned int prop) | |
827 | { | |
828 | struct extcon_cable *cable; | |
829 | int index, type, ret = 0; | |
830 | ||
831 | if (!edev) | |
832 | return -EINVAL; | |
833 | ||
834 | /* Check whether the property is supported or not. */ | |
835 | if (!is_extcon_property_supported(id, prop)) | |
836 | return -EINVAL; | |
837 | ||
838 | /* Find the cable index of external connector by using id. */ | |
839 | index = find_cable_index_by_id(edev, id); | |
840 | if (index < 0) | |
841 | return index; | |
842 | ||
843 | type = get_extcon_type(prop); | |
844 | if (type < 0) | |
845 | return type; | |
846 | ||
847 | cable = &edev->cables[index]; | |
848 | ||
849 | switch (type) { | |
850 | case EXTCON_TYPE_USB: | |
851 | __set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); | |
852 | break; | |
853 | case EXTCON_TYPE_CHG: | |
854 | __set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); | |
855 | break; | |
856 | case EXTCON_TYPE_JACK: | |
857 | __set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); | |
858 | break; | |
859 | case EXTCON_TYPE_DISP: | |
860 | __set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); | |
861 | break; | |
862 | default: | |
863 | ret = -EINVAL; | |
864 | } | |
865 | ||
866 | return ret; | |
867 | } | |
868 | EXPORT_SYMBOL_GPL(extcon_set_property_capability); | |
869 | ||
74c5d09b DK |
870 | /** |
871 | * extcon_get_extcon_dev() - Get the extcon device instance from the name | |
872 | * @extcon_name: The extcon name provided with extcon_dev_register() | |
873 | */ | |
874 | struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) | |
875 | { | |
876 | struct extcon_dev *sd; | |
877 | ||
7eae43ae CC |
878 | if (!extcon_name) |
879 | return ERR_PTR(-EINVAL); | |
880 | ||
74c5d09b DK |
881 | mutex_lock(&extcon_dev_list_lock); |
882 | list_for_each_entry(sd, &extcon_dev_list, entry) { | |
883 | if (!strcmp(sd->name, extcon_name)) | |
884 | goto out; | |
885 | } | |
886 | sd = NULL; | |
887 | out: | |
888 | mutex_unlock(&extcon_dev_list_lock); | |
889 | return sd; | |
890 | } | |
891 | EXPORT_SYMBOL_GPL(extcon_get_extcon_dev); | |
892 | ||
893 | /** | |
c338bb03 | 894 | * extcon_register_notifier() - Register a notifiee to get notified by |
a75e1c73 | 895 | * any attach status changes from the extcon. |
046050f6 CC |
896 | * @edev: the extcon device that has the external connecotr. |
897 | * @id: the unique id of each external connector in extcon enumeration. | |
74c5d09b | 898 | * @nb: a notifier block to be registered. |
806d9dd7 MH |
899 | * |
900 | * Note that the second parameter given to the callback of nb (val) is | |
901 | * "old_state", not the current state. The current state can be retrieved | |
902 | * by looking at the third pameter (edev pointer)'s state value. | |
74c5d09b | 903 | */ |
73b6ecdb | 904 | int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, |
046050f6 | 905 | struct notifier_block *nb) |
74c5d09b | 906 | { |
66bee35f | 907 | unsigned long flags; |
2c8116a1 | 908 | int ret, idx = -EINVAL; |
046050f6 | 909 | |
01b4c9a1 | 910 | if (!edev || !nb) |
7eae43ae CC |
911 | return -EINVAL; |
912 | ||
01b4c9a1 CC |
913 | idx = find_cable_index_by_id(edev, id); |
914 | if (idx < 0) | |
915 | return idx; | |
66bee35f | 916 | |
01b4c9a1 CC |
917 | spin_lock_irqsave(&edev->lock, flags); |
918 | ret = raw_notifier_chain_register(&edev->nh[idx], nb); | |
919 | spin_unlock_irqrestore(&edev->lock, flags); | |
66bee35f HG |
920 | |
921 | return ret; | |
74c5d09b DK |
922 | } |
923 | EXPORT_SYMBOL_GPL(extcon_register_notifier); | |
924 | ||
925 | /** | |
c338bb03 | 926 | * extcon_unregister_notifier() - Unregister a notifiee from the extcon device. |
046050f6 CC |
927 | * @edev: the extcon device that has the external connecotr. |
928 | * @id: the unique id of each external connector in extcon enumeration. | |
929 | * @nb: a notifier block to be registered. | |
74c5d09b | 930 | */ |
73b6ecdb | 931 | int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, |
046050f6 | 932 | struct notifier_block *nb) |
74c5d09b | 933 | { |
66bee35f | 934 | unsigned long flags; |
046050f6 CC |
935 | int ret, idx; |
936 | ||
7eae43ae CC |
937 | if (!edev || !nb) |
938 | return -EINVAL; | |
939 | ||
046050f6 | 940 | idx = find_cable_index_by_id(edev, id); |
a05f44c8 SB |
941 | if (idx < 0) |
942 | return idx; | |
66bee35f HG |
943 | |
944 | spin_lock_irqsave(&edev->lock, flags); | |
046050f6 | 945 | ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); |
66bee35f HG |
946 | spin_unlock_irqrestore(&edev->lock, flags); |
947 | ||
948 | return ret; | |
74c5d09b DK |
949 | } |
950 | EXPORT_SYMBOL_GPL(extcon_unregister_notifier); | |
951 | ||
af01da0e GKH |
952 | static struct attribute *extcon_attrs[] = { |
953 | &dev_attr_state.attr, | |
954 | &dev_attr_name.attr, | |
955 | NULL, | |
de55d871 | 956 | }; |
af01da0e | 957 | ATTRIBUTE_GROUPS(extcon); |
de55d871 MH |
958 | |
959 | static int create_extcon_class(void) | |
960 | { | |
961 | if (!extcon_class) { | |
962 | extcon_class = class_create(THIS_MODULE, "extcon"); | |
963 | if (IS_ERR(extcon_class)) | |
964 | return PTR_ERR(extcon_class); | |
af01da0e | 965 | extcon_class->dev_groups = extcon_groups; |
de55d871 | 966 | |
449a2bf5 | 967 | #if defined(CONFIG_ANDROID) |
de55d871 MH |
968 | switch_class = class_compat_register("switch"); |
969 | if (WARN(!switch_class, "cannot allocate")) | |
970 | return -ENOMEM; | |
449a2bf5 | 971 | #endif /* CONFIG_ANDROID */ |
de55d871 MH |
972 | } |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
de55d871 MH |
977 | static void extcon_dev_release(struct device *dev) |
978 | { | |
de55d871 MH |
979 | } |
980 | ||
bde68e60 | 981 | static const char *muex_name = "mutually_exclusive"; |
806d9dd7 MH |
982 | static void dummy_sysfs_dev_release(struct device *dev) |
983 | { | |
984 | } | |
985 | ||
a9af6522 CC |
986 | /* |
987 | * extcon_dev_allocate() - Allocate the memory of extcon device. | |
2a9de9c0 | 988 | * @supported_cable: Array of supported extcon ending with EXTCON_NONE. |
a9af6522 CC |
989 | * If supported_cable is NULL, cable name related APIs |
990 | * are disabled. | |
991 | * | |
992 | * This function allocates the memory for extcon device without allocating | |
993 | * memory in each extcon provider driver and initialize default setting for | |
994 | * extcon device. | |
995 | * | |
996 | * Return the pointer of extcon device if success or ERR_PTR(err) if fail | |
997 | */ | |
73b6ecdb | 998 | struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable) |
a9af6522 CC |
999 | { |
1000 | struct extcon_dev *edev; | |
1001 | ||
7eae43ae CC |
1002 | if (!supported_cable) |
1003 | return ERR_PTR(-EINVAL); | |
1004 | ||
a9af6522 CC |
1005 | edev = kzalloc(sizeof(*edev), GFP_KERNEL); |
1006 | if (!edev) | |
1007 | return ERR_PTR(-ENOMEM); | |
1008 | ||
1009 | edev->max_supported = 0; | |
1010 | edev->supported_cable = supported_cable; | |
1011 | ||
1012 | return edev; | |
1013 | } | |
1014 | ||
1015 | /* | |
1016 | * extcon_dev_free() - Free the memory of extcon device. | |
1017 | * @edev: the extcon device to free | |
1018 | */ | |
1019 | void extcon_dev_free(struct extcon_dev *edev) | |
1020 | { | |
1021 | kfree(edev); | |
1022 | } | |
1023 | EXPORT_SYMBOL_GPL(extcon_dev_free); | |
1024 | ||
de55d871 MH |
1025 | /** |
1026 | * extcon_dev_register() - Register a new extcon device | |
1027 | * @edev : the new extcon device (should be allocated before calling) | |
de55d871 MH |
1028 | * |
1029 | * Among the members of edev struct, please set the "user initializing data" | |
1030 | * in any case and set the "optional callbacks" if required. However, please | |
1031 | * do not set the values of "internal data", which are initialized by | |
1032 | * this function. | |
1033 | */ | |
42d7d753 | 1034 | int extcon_dev_register(struct extcon_dev *edev) |
de55d871 | 1035 | { |
806d9dd7 | 1036 | int ret, index = 0; |
71c3ffa5 | 1037 | static atomic_t edev_no = ATOMIC_INIT(-1); |
de55d871 MH |
1038 | |
1039 | if (!extcon_class) { | |
1040 | ret = create_extcon_class(); | |
1041 | if (ret < 0) | |
1042 | return ret; | |
1043 | } | |
1044 | ||
7eae43ae | 1045 | if (!edev || !edev->supported_cable) |
2a9de9c0 CC |
1046 | return -EINVAL; |
1047 | ||
1048 | for (; edev->supported_cable[index] != EXTCON_NONE; index++); | |
806d9dd7 | 1049 | |
2a9de9c0 | 1050 | edev->max_supported = index; |
806d9dd7 | 1051 | if (index > SUPPORTED_CABLE_MAX) { |
2a9de9c0 CC |
1052 | dev_err(&edev->dev, |
1053 | "exceed the maximum number of supported cables\n"); | |
806d9dd7 MH |
1054 | return -EINVAL; |
1055 | } | |
1056 | ||
dae61651 CC |
1057 | edev->dev.class = extcon_class; |
1058 | edev->dev.release = extcon_dev_release; | |
de55d871 | 1059 | |
71c3ffa5 | 1060 | edev->name = dev_name(edev->dev.parent); |
42d7d753 CC |
1061 | if (IS_ERR_OR_NULL(edev->name)) { |
1062 | dev_err(&edev->dev, | |
1063 | "extcon device name is null\n"); | |
1064 | return -EINVAL; | |
1065 | } | |
71c3ffa5 CC |
1066 | dev_set_name(&edev->dev, "extcon%lu", |
1067 | (unsigned long)atomic_inc_return(&edev_no)); | |
806d9dd7 MH |
1068 | |
1069 | if (edev->max_supported) { | |
1070 | char buf[10]; | |
1071 | char *str; | |
1072 | struct extcon_cable *cable; | |
1073 | ||
1074 | edev->cables = kzalloc(sizeof(struct extcon_cable) * | |
1075 | edev->max_supported, GFP_KERNEL); | |
1076 | if (!edev->cables) { | |
1077 | ret = -ENOMEM; | |
1078 | goto err_sysfs_alloc; | |
1079 | } | |
1080 | for (index = 0; index < edev->max_supported; index++) { | |
1081 | cable = &edev->cables[index]; | |
1082 | ||
1083 | snprintf(buf, 10, "cable.%d", index); | |
1084 | str = kzalloc(sizeof(char) * (strlen(buf) + 1), | |
1085 | GFP_KERNEL); | |
1086 | if (!str) { | |
1087 | for (index--; index >= 0; index--) { | |
1088 | cable = &edev->cables[index]; | |
1089 | kfree(cable->attr_g.name); | |
1090 | } | |
1091 | ret = -ENOMEM; | |
1092 | ||
1093 | goto err_alloc_cables; | |
1094 | } | |
1095 | strcpy(str, buf); | |
1096 | ||
1097 | cable->edev = edev; | |
1098 | cable->cable_index = index; | |
1099 | cable->attrs[0] = &cable->attr_name.attr; | |
1100 | cable->attrs[1] = &cable->attr_state.attr; | |
1101 | cable->attrs[2] = NULL; | |
1102 | cable->attr_g.name = str; | |
1103 | cable->attr_g.attrs = cable->attrs; | |
1104 | ||
9baf3220 | 1105 | sysfs_attr_init(&cable->attr_name.attr); |
806d9dd7 MH |
1106 | cable->attr_name.attr.name = "name"; |
1107 | cable->attr_name.attr.mode = 0444; | |
1108 | cable->attr_name.show = cable_name_show; | |
1109 | ||
9baf3220 | 1110 | sysfs_attr_init(&cable->attr_state.attr); |
806d9dd7 | 1111 | cable->attr_state.attr.name = "state"; |
ea9dd9d6 | 1112 | cable->attr_state.attr.mode = 0444; |
806d9dd7 | 1113 | cable->attr_state.show = cable_state_show; |
806d9dd7 MH |
1114 | } |
1115 | } | |
1116 | ||
bde68e60 MH |
1117 | if (edev->max_supported && edev->mutually_exclusive) { |
1118 | char buf[80]; | |
1119 | char *name; | |
1120 | ||
1121 | /* Count the size of mutually_exclusive array */ | |
1122 | for (index = 0; edev->mutually_exclusive[index]; index++) | |
1123 | ; | |
1124 | ||
1125 | edev->attrs_muex = kzalloc(sizeof(struct attribute *) * | |
1126 | (index + 1), GFP_KERNEL); | |
1127 | if (!edev->attrs_muex) { | |
1128 | ret = -ENOMEM; | |
1129 | goto err_muex; | |
1130 | } | |
1131 | ||
1132 | edev->d_attrs_muex = kzalloc(sizeof(struct device_attribute) * | |
1133 | index, GFP_KERNEL); | |
1134 | if (!edev->d_attrs_muex) { | |
1135 | ret = -ENOMEM; | |
1136 | kfree(edev->attrs_muex); | |
1137 | goto err_muex; | |
1138 | } | |
1139 | ||
1140 | for (index = 0; edev->mutually_exclusive[index]; index++) { | |
1141 | sprintf(buf, "0x%x", edev->mutually_exclusive[index]); | |
1142 | name = kzalloc(sizeof(char) * (strlen(buf) + 1), | |
1143 | GFP_KERNEL); | |
1144 | if (!name) { | |
1145 | for (index--; index >= 0; index--) { | |
1146 | kfree(edev->d_attrs_muex[index].attr. | |
1147 | name); | |
1148 | } | |
1149 | kfree(edev->d_attrs_muex); | |
1150 | kfree(edev->attrs_muex); | |
1151 | ret = -ENOMEM; | |
1152 | goto err_muex; | |
1153 | } | |
1154 | strcpy(name, buf); | |
9baf3220 | 1155 | sysfs_attr_init(&edev->d_attrs_muex[index].attr); |
bde68e60 MH |
1156 | edev->d_attrs_muex[index].attr.name = name; |
1157 | edev->d_attrs_muex[index].attr.mode = 0000; | |
1158 | edev->attrs_muex[index] = &edev->d_attrs_muex[index] | |
1159 | .attr; | |
1160 | } | |
1161 | edev->attr_g_muex.name = muex_name; | |
1162 | edev->attr_g_muex.attrs = edev->attrs_muex; | |
1163 | ||
1164 | } | |
1165 | ||
806d9dd7 MH |
1166 | if (edev->max_supported) { |
1167 | edev->extcon_dev_type.groups = | |
1168 | kzalloc(sizeof(struct attribute_group *) * | |
bde68e60 | 1169 | (edev->max_supported + 2), GFP_KERNEL); |
806d9dd7 MH |
1170 | if (!edev->extcon_dev_type.groups) { |
1171 | ret = -ENOMEM; | |
1172 | goto err_alloc_groups; | |
1173 | } | |
1174 | ||
dae61651 | 1175 | edev->extcon_dev_type.name = dev_name(&edev->dev); |
806d9dd7 MH |
1176 | edev->extcon_dev_type.release = dummy_sysfs_dev_release; |
1177 | ||
1178 | for (index = 0; index < edev->max_supported; index++) | |
1179 | edev->extcon_dev_type.groups[index] = | |
1180 | &edev->cables[index].attr_g; | |
bde68e60 MH |
1181 | if (edev->mutually_exclusive) |
1182 | edev->extcon_dev_type.groups[index] = | |
1183 | &edev->attr_g_muex; | |
806d9dd7 | 1184 | |
dae61651 | 1185 | edev->dev.type = &edev->extcon_dev_type; |
806d9dd7 MH |
1186 | } |
1187 | ||
dae61651 | 1188 | ret = device_register(&edev->dev); |
de55d871 | 1189 | if (ret) { |
dae61651 | 1190 | put_device(&edev->dev); |
de55d871 MH |
1191 | goto err_dev; |
1192 | } | |
449a2bf5 | 1193 | #if defined(CONFIG_ANDROID) |
de55d871 | 1194 | if (switch_class) |
dae61651 | 1195 | ret = class_compat_create_link(switch_class, &edev->dev, NULL); |
449a2bf5 | 1196 | #endif /* CONFIG_ANDROID */ |
de55d871 | 1197 | |
806d9dd7 MH |
1198 | spin_lock_init(&edev->lock); |
1199 | ||
046050f6 CC |
1200 | edev->nh = devm_kzalloc(&edev->dev, |
1201 | sizeof(*edev->nh) * edev->max_supported, GFP_KERNEL); | |
1202 | if (!edev->nh) { | |
1203 | ret = -ENOMEM; | |
1204 | goto err_dev; | |
1205 | } | |
1206 | ||
1207 | for (index = 0; index < edev->max_supported; index++) | |
1208 | RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]); | |
74c5d09b | 1209 | |
dae61651 | 1210 | dev_set_drvdata(&edev->dev, edev); |
de55d871 | 1211 | edev->state = 0; |
74c5d09b DK |
1212 | |
1213 | mutex_lock(&extcon_dev_list_lock); | |
1214 | list_add(&edev->entry, &extcon_dev_list); | |
1215 | mutex_unlock(&extcon_dev_list_lock); | |
1216 | ||
de55d871 MH |
1217 | return 0; |
1218 | ||
1219 | err_dev: | |
806d9dd7 MH |
1220 | if (edev->max_supported) |
1221 | kfree(edev->extcon_dev_type.groups); | |
1222 | err_alloc_groups: | |
bde68e60 MH |
1223 | if (edev->max_supported && edev->mutually_exclusive) { |
1224 | for (index = 0; edev->mutually_exclusive[index]; index++) | |
1225 | kfree(edev->d_attrs_muex[index].attr.name); | |
1226 | kfree(edev->d_attrs_muex); | |
1227 | kfree(edev->attrs_muex); | |
1228 | } | |
1229 | err_muex: | |
806d9dd7 MH |
1230 | for (index = 0; index < edev->max_supported; index++) |
1231 | kfree(edev->cables[index].attr_g.name); | |
1232 | err_alloc_cables: | |
1233 | if (edev->max_supported) | |
1234 | kfree(edev->cables); | |
1235 | err_sysfs_alloc: | |
de55d871 MH |
1236 | return ret; |
1237 | } | |
1238 | EXPORT_SYMBOL_GPL(extcon_dev_register); | |
1239 | ||
1240 | /** | |
1241 | * extcon_dev_unregister() - Unregister the extcon device. | |
c338bb03 | 1242 | * @edev: the extcon device instance to be unregistered. |
de55d871 MH |
1243 | * |
1244 | * Note that this does not call kfree(edev) because edev was not allocated | |
1245 | * by this class. | |
1246 | */ | |
1247 | void extcon_dev_unregister(struct extcon_dev *edev) | |
1248 | { | |
57e7cd37 | 1249 | int index; |
1250 | ||
7eae43ae CC |
1251 | if (!edev) |
1252 | return; | |
1253 | ||
57e7cd37 | 1254 | mutex_lock(&extcon_dev_list_lock); |
1255 | list_del(&edev->entry); | |
1256 | mutex_unlock(&extcon_dev_list_lock); | |
1257 | ||
dae61651 CC |
1258 | if (IS_ERR_OR_NULL(get_device(&edev->dev))) { |
1259 | dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n", | |
1260 | dev_name(&edev->dev)); | |
57e7cd37 | 1261 | return; |
1262 | } | |
1263 | ||
7585ca0d WX |
1264 | device_unregister(&edev->dev); |
1265 | ||
57e7cd37 | 1266 | if (edev->mutually_exclusive && edev->max_supported) { |
1267 | for (index = 0; edev->mutually_exclusive[index]; | |
1268 | index++) | |
1269 | kfree(edev->d_attrs_muex[index].attr.name); | |
1270 | kfree(edev->d_attrs_muex); | |
1271 | kfree(edev->attrs_muex); | |
1272 | } | |
1273 | ||
1274 | for (index = 0; index < edev->max_supported; index++) | |
1275 | kfree(edev->cables[index].attr_g.name); | |
1276 | ||
1277 | if (edev->max_supported) { | |
1278 | kfree(edev->extcon_dev_type.groups); | |
1279 | kfree(edev->cables); | |
1280 | } | |
1281 | ||
1282 | #if defined(CONFIG_ANDROID) | |
1283 | if (switch_class) | |
dae61651 | 1284 | class_compat_remove_link(switch_class, &edev->dev, NULL); |
57e7cd37 | 1285 | #endif |
dae61651 | 1286 | put_device(&edev->dev); |
de55d871 MH |
1287 | } |
1288 | EXPORT_SYMBOL_GPL(extcon_dev_unregister); | |
1289 | ||
1ad94ffe CC |
1290 | #ifdef CONFIG_OF |
1291 | /* | |
1292 | * extcon_get_edev_by_phandle - Get the extcon device from devicetree | |
1293 | * @dev - instance to the given device | |
1294 | * @index - index into list of extcon_dev | |
1295 | * | |
1296 | * return the instance of extcon device | |
1297 | */ | |
1298 | struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) | |
1299 | { | |
1300 | struct device_node *node; | |
1301 | struct extcon_dev *edev; | |
1302 | ||
7eae43ae CC |
1303 | if (!dev) |
1304 | return ERR_PTR(-EINVAL); | |
1305 | ||
1ad94ffe | 1306 | if (!dev->of_node) { |
e8752b7a | 1307 | dev_dbg(dev, "device does not have a device node entry\n"); |
1ad94ffe CC |
1308 | return ERR_PTR(-EINVAL); |
1309 | } | |
1310 | ||
1311 | node = of_parse_phandle(dev->of_node, "extcon", index); | |
1312 | if (!node) { | |
e8752b7a | 1313 | dev_dbg(dev, "failed to get phandle in %s node\n", |
1ad94ffe CC |
1314 | dev->of_node->full_name); |
1315 | return ERR_PTR(-ENODEV); | |
1316 | } | |
1317 | ||
f841afb1 TF |
1318 | mutex_lock(&extcon_dev_list_lock); |
1319 | list_for_each_entry(edev, &extcon_dev_list, entry) { | |
1320 | if (edev->dev.parent && edev->dev.parent->of_node == node) { | |
1321 | mutex_unlock(&extcon_dev_list_lock); | |
5d5c4c13 | 1322 | of_node_put(node); |
f841afb1 TF |
1323 | return edev; |
1324 | } | |
1ad94ffe | 1325 | } |
f841afb1 | 1326 | mutex_unlock(&extcon_dev_list_lock); |
5d5c4c13 | 1327 | of_node_put(node); |
1ad94ffe | 1328 | |
f841afb1 | 1329 | return ERR_PTR(-EPROBE_DEFER); |
1ad94ffe CC |
1330 | } |
1331 | #else | |
1332 | struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) | |
1333 | { | |
1334 | return ERR_PTR(-ENOSYS); | |
1335 | } | |
1336 | #endif /* CONFIG_OF */ | |
1337 | EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); | |
1338 | ||
707d7550 CC |
1339 | /** |
1340 | * extcon_get_edev_name() - Get the name of the extcon device. | |
1341 | * @edev: the extcon device | |
1342 | */ | |
1343 | const char *extcon_get_edev_name(struct extcon_dev *edev) | |
1344 | { | |
1345 | return !edev ? NULL : edev->name; | |
1346 | } | |
1347 | ||
de55d871 MH |
1348 | static int __init extcon_class_init(void) |
1349 | { | |
1350 | return create_extcon_class(); | |
1351 | } | |
1352 | module_init(extcon_class_init); | |
1353 | ||
1354 | static void __exit extcon_class_exit(void) | |
1355 | { | |
0dc77b6d PH |
1356 | #if defined(CONFIG_ANDROID) |
1357 | class_compat_unregister(switch_class); | |
1358 | #endif | |
de55d871 MH |
1359 | class_destroy(extcon_class); |
1360 | } | |
1361 | module_exit(extcon_class_exit); | |
1362 | ||
2a9de9c0 | 1363 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); |
de55d871 MH |
1364 | MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>"); |
1365 | MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>"); | |
1366 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1367 | MODULE_DESCRIPTION("External connector (extcon) class driver"); | |
1368 | MODULE_LICENSE("GPL"); |