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Commit | Line | Data |
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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, | |
86d6cda6 | 63 | .name = "USB-HOST", |
55e4e2f1 | 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 | }, | |
3c5f0e07 CC |
102 | [EXTCON_CHG_USB_PD] = { |
103 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, | |
104 | .id = EXTCON_CHG_USB_PD, | |
105 | .name = "PD", | |
106 | }, | |
8e9bc36d | 107 | |
11eecf91 | 108 | /* Jack external connector */ |
55e4e2f1 CC |
109 | [EXTCON_JACK_MICROPHONE] = { |
110 | .type = EXTCON_TYPE_JACK, | |
111 | .id = EXTCON_JACK_MICROPHONE, | |
112 | .name = "MICROPHONE", | |
113 | }, | |
114 | [EXTCON_JACK_HEADPHONE] = { | |
115 | .type = EXTCON_TYPE_JACK, | |
116 | .id = EXTCON_JACK_HEADPHONE, | |
117 | .name = "HEADPHONE", | |
118 | }, | |
119 | [EXTCON_JACK_LINE_IN] = { | |
120 | .type = EXTCON_TYPE_JACK, | |
121 | .id = EXTCON_JACK_LINE_IN, | |
122 | .name = "LINE-IN", | |
123 | }, | |
124 | [EXTCON_JACK_LINE_OUT] = { | |
125 | .type = EXTCON_TYPE_JACK, | |
126 | .id = EXTCON_JACK_LINE_OUT, | |
127 | .name = "LINE-OUT", | |
128 | }, | |
129 | [EXTCON_JACK_VIDEO_IN] = { | |
130 | .type = EXTCON_TYPE_JACK, | |
131 | .id = EXTCON_JACK_VIDEO_IN, | |
132 | .name = "VIDEO-IN", | |
133 | }, | |
134 | [EXTCON_JACK_VIDEO_OUT] = { | |
135 | .type = EXTCON_TYPE_JACK, | |
136 | .id = EXTCON_JACK_VIDEO_OUT, | |
137 | .name = "VIDEO-OUT", | |
138 | }, | |
139 | [EXTCON_JACK_SPDIF_IN] = { | |
140 | .type = EXTCON_TYPE_JACK, | |
141 | .id = EXTCON_JACK_SPDIF_IN, | |
142 | .name = "SPDIF-IN", | |
143 | }, | |
144 | [EXTCON_JACK_SPDIF_OUT] = { | |
145 | .type = EXTCON_TYPE_JACK, | |
146 | .id = EXTCON_JACK_SPDIF_OUT, | |
147 | .name = "SPDIF-OUT", | |
148 | }, | |
8e9bc36d | 149 | |
11eecf91 | 150 | /* Display external connector */ |
55e4e2f1 CC |
151 | [EXTCON_DISP_HDMI] = { |
152 | .type = EXTCON_TYPE_DISP, | |
153 | .id = EXTCON_DISP_HDMI, | |
154 | .name = "HDMI", | |
155 | }, | |
156 | [EXTCON_DISP_MHL] = { | |
157 | .type = EXTCON_TYPE_DISP, | |
158 | .id = EXTCON_DISP_MHL, | |
159 | .name = "MHL", | |
160 | }, | |
161 | [EXTCON_DISP_DVI] = { | |
162 | .type = EXTCON_TYPE_DISP, | |
163 | .id = EXTCON_DISP_DVI, | |
164 | .name = "DVI", | |
165 | }, | |
166 | [EXTCON_DISP_VGA] = { | |
167 | .type = EXTCON_TYPE_DISP, | |
168 | .id = EXTCON_DISP_VGA, | |
169 | .name = "VGA", | |
170 | }, | |
2164188d CZ |
171 | [EXTCON_DISP_DP] = { |
172 | .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, | |
173 | .id = EXTCON_DISP_DP, | |
174 | .name = "DP", | |
175 | }, | |
9c0595d6 CC |
176 | [EXTCON_DISP_HMD] = { |
177 | .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, | |
178 | .id = EXTCON_DISP_HMD, | |
179 | .name = "HMD", | |
180 | }, | |
8e9bc36d | 181 | |
11eecf91 | 182 | /* Miscellaneous external connector */ |
55e4e2f1 CC |
183 | [EXTCON_DOCK] = { |
184 | .type = EXTCON_TYPE_MISC, | |
185 | .id = EXTCON_DOCK, | |
186 | .name = "DOCK", | |
187 | }, | |
188 | [EXTCON_JIG] = { | |
189 | .type = EXTCON_TYPE_MISC, | |
190 | .id = EXTCON_JIG, | |
191 | .name = "JIG", | |
192 | }, | |
193 | [EXTCON_MECHANICAL] = { | |
194 | .type = EXTCON_TYPE_MISC, | |
195 | .id = EXTCON_MECHANICAL, | |
196 | .name = "MECHANICAL", | |
197 | }, | |
198 | ||
199 | { /* sentinel */ } | |
806d9dd7 MH |
200 | }; |
201 | ||
20f7b53d CC |
202 | /** |
203 | * struct extcon_cable - An internal data for each cable of extcon device. | |
204 | * @edev: The extcon device | |
205 | * @cable_index: Index of this cable in the edev | |
206 | * @attr_g: Attribute group for the cable | |
207 | * @attr_name: "name" sysfs entry | |
208 | * @attr_state: "state" sysfs entry | |
209 | * @attrs: Array pointing to attr_name and attr_state for attr_g | |
210 | */ | |
211 | struct extcon_cable { | |
212 | struct extcon_dev *edev; | |
213 | int cable_index; | |
214 | ||
215 | struct attribute_group attr_g; | |
216 | struct device_attribute attr_name; | |
217 | struct device_attribute attr_state; | |
218 | ||
219 | struct attribute *attrs[3]; /* to be fed to attr_g.attrs */ | |
792e7e9e CC |
220 | |
221 | union extcon_property_value usb_propval[EXTCON_PROP_USB_CNT]; | |
222 | union extcon_property_value chg_propval[EXTCON_PROP_CHG_CNT]; | |
223 | union extcon_property_value jack_propval[EXTCON_PROP_JACK_CNT]; | |
224 | union extcon_property_value disp_propval[EXTCON_PROP_DISP_CNT]; | |
7f2a0a16 CC |
225 | |
226 | unsigned long usb_bits[BITS_TO_LONGS(EXTCON_PROP_USB_CNT)]; | |
227 | unsigned long chg_bits[BITS_TO_LONGS(EXTCON_PROP_CHG_CNT)]; | |
228 | unsigned long jack_bits[BITS_TO_LONGS(EXTCON_PROP_JACK_CNT)]; | |
229 | unsigned long disp_bits[BITS_TO_LONGS(EXTCON_PROP_DISP_CNT)]; | |
20f7b53d CC |
230 | }; |
231 | ||
be3a07f7 | 232 | static struct class *extcon_class; |
449a2bf5 | 233 | #if defined(CONFIG_ANDROID) |
de55d871 | 234 | static struct class_compat *switch_class; |
449a2bf5 | 235 | #endif /* CONFIG_ANDROID */ |
de55d871 | 236 | |
74c5d09b DK |
237 | static LIST_HEAD(extcon_dev_list); |
238 | static DEFINE_MUTEX(extcon_dev_list_lock); | |
239 | ||
bde68e60 MH |
240 | /** |
241 | * check_mutually_exclusive - Check if new_state violates mutually_exclusive | |
a75e1c73 | 242 | * condition. |
bde68e60 MH |
243 | * @edev: the extcon device |
244 | * @new_state: new cable attach status for @edev | |
245 | * | |
246 | * Returns 0 if nothing violates. Returns the index + 1 for the first | |
247 | * violated condition. | |
248 | */ | |
249 | static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state) | |
250 | { | |
251 | int i = 0; | |
252 | ||
253 | if (!edev->mutually_exclusive) | |
254 | return 0; | |
255 | ||
256 | for (i = 0; edev->mutually_exclusive[i]; i++) { | |
28c0ada6 | 257 | int weight; |
bde68e60 | 258 | u32 correspondants = new_state & edev->mutually_exclusive[i]; |
bde68e60 | 259 | |
28c0ada6 | 260 | /* calculate the total number of bits set */ |
261 | weight = hweight32(correspondants); | |
262 | if (weight > 1) | |
263 | return i + 1; | |
bde68e60 MH |
264 | } |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
73b6ecdb | 269 | static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id) |
2a9de9c0 CC |
270 | { |
271 | int i; | |
272 | ||
273 | /* Find the the index of extcon cable in edev->supported_cable */ | |
274 | for (i = 0; i < edev->max_supported; i++) { | |
275 | if (edev->supported_cable[i] == id) | |
276 | return i; | |
277 | } | |
278 | ||
279 | return -EINVAL; | |
280 | } | |
281 | ||
792e7e9e CC |
282 | static int get_extcon_type(unsigned int prop) |
283 | { | |
284 | switch (prop) { | |
285 | case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: | |
286 | return EXTCON_TYPE_USB; | |
287 | case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: | |
288 | return EXTCON_TYPE_CHG; | |
289 | case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: | |
290 | return EXTCON_TYPE_JACK; | |
291 | case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: | |
292 | return EXTCON_TYPE_DISP; | |
293 | default: | |
294 | return -EINVAL; | |
295 | } | |
296 | } | |
297 | ||
298 | static bool is_extcon_attached(struct extcon_dev *edev, unsigned int index) | |
299 | { | |
300 | return !!(edev->state & BIT(index)); | |
301 | } | |
302 | ||
ab11af04 CC |
303 | static bool is_extcon_changed(struct extcon_dev *edev, int index, |
304 | bool new_state) | |
046050f6 | 305 | { |
ab11af04 CC |
306 | int state = !!(edev->state & BIT(index)); |
307 | return (state != new_state); | |
046050f6 CC |
308 | } |
309 | ||
792e7e9e CC |
310 | static bool is_extcon_property_supported(unsigned int id, unsigned int prop) |
311 | { | |
312 | int type; | |
313 | ||
314 | /* Check whether the property is supported or not. */ | |
315 | type = get_extcon_type(prop); | |
316 | if (type < 0) | |
317 | return false; | |
318 | ||
319 | /* Check whether a specific extcon id supports the property or not. */ | |
320 | return !!(extcon_info[id].type & type); | |
321 | } | |
322 | ||
7f2a0a16 CC |
323 | static int is_extcon_property_capability(struct extcon_dev *edev, |
324 | unsigned int id, int index,unsigned int prop) | |
325 | { | |
326 | struct extcon_cable *cable; | |
327 | int type, ret; | |
328 | ||
329 | /* Check whether the property is supported or not. */ | |
330 | type = get_extcon_type(prop); | |
331 | if (type < 0) | |
332 | return type; | |
333 | ||
334 | cable = &edev->cables[index]; | |
335 | ||
336 | switch (type) { | |
337 | case EXTCON_TYPE_USB: | |
338 | ret = test_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); | |
339 | break; | |
340 | case EXTCON_TYPE_CHG: | |
341 | ret = test_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); | |
342 | break; | |
343 | case EXTCON_TYPE_JACK: | |
344 | ret = test_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); | |
345 | break; | |
346 | case EXTCON_TYPE_DISP: | |
347 | ret = test_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); | |
348 | break; | |
349 | default: | |
350 | ret = -EINVAL; | |
351 | } | |
352 | ||
353 | return ret; | |
354 | } | |
355 | ||
792e7e9e CC |
356 | static void init_property(struct extcon_dev *edev, unsigned int id, int index) |
357 | { | |
358 | unsigned int type = extcon_info[id].type; | |
359 | struct extcon_cable *cable = &edev->cables[index]; | |
360 | ||
361 | if (EXTCON_TYPE_USB & type) | |
362 | memset(cable->usb_propval, 0, sizeof(cable->usb_propval)); | |
363 | if (EXTCON_TYPE_CHG & type) | |
364 | memset(cable->chg_propval, 0, sizeof(cable->chg_propval)); | |
365 | if (EXTCON_TYPE_JACK & type) | |
366 | memset(cable->jack_propval, 0, sizeof(cable->jack_propval)); | |
367 | if (EXTCON_TYPE_DISP & type) | |
368 | memset(cable->disp_propval, 0, sizeof(cable->disp_propval)); | |
369 | } | |
370 | ||
de55d871 MH |
371 | static ssize_t state_show(struct device *dev, struct device_attribute *attr, |
372 | char *buf) | |
373 | { | |
806d9dd7 | 374 | int i, count = 0; |
cb8bb3a7 | 375 | struct extcon_dev *edev = dev_get_drvdata(dev); |
de55d871 | 376 | |
806d9dd7 MH |
377 | if (edev->max_supported == 0) |
378 | return sprintf(buf, "%u\n", edev->state); | |
379 | ||
2a9de9c0 | 380 | for (i = 0; i < edev->max_supported; i++) { |
806d9dd7 | 381 | count += sprintf(buf + count, "%s=%d\n", |
55e4e2f1 | 382 | extcon_info[edev->supported_cable[i]].name, |
806d9dd7 MH |
383 | !!(edev->state & (1 << i))); |
384 | } | |
385 | ||
386 | return count; | |
387 | } | |
5d5321e9 | 388 | static DEVICE_ATTR_RO(state); |
de55d871 MH |
389 | |
390 | static ssize_t name_show(struct device *dev, struct device_attribute *attr, | |
391 | char *buf) | |
392 | { | |
cb8bb3a7 | 393 | struct extcon_dev *edev = dev_get_drvdata(dev); |
de55d871 | 394 | |
71c3ffa5 | 395 | return sprintf(buf, "%s\n", edev->name); |
de55d871 | 396 | } |
af01da0e | 397 | static DEVICE_ATTR_RO(name); |
de55d871 | 398 | |
806d9dd7 MH |
399 | static ssize_t cable_name_show(struct device *dev, |
400 | struct device_attribute *attr, char *buf) | |
401 | { | |
402 | struct extcon_cable *cable = container_of(attr, struct extcon_cable, | |
403 | attr_name); | |
2a9de9c0 | 404 | int i = cable->cable_index; |
806d9dd7 MH |
405 | |
406 | return sprintf(buf, "%s\n", | |
55e4e2f1 | 407 | extcon_info[cable->edev->supported_cable[i]].name); |
806d9dd7 MH |
408 | } |
409 | ||
410 | static ssize_t cable_state_show(struct device *dev, | |
411 | struct device_attribute *attr, char *buf) | |
412 | { | |
413 | struct extcon_cable *cable = container_of(attr, struct extcon_cable, | |
414 | attr_state); | |
415 | ||
be052cc8 RQ |
416 | int i = cable->cable_index; |
417 | ||
806d9dd7 | 418 | return sprintf(buf, "%d\n", |
575c2b86 | 419 | extcon_get_state(cable->edev, cable->edev->supported_cable[i])); |
806d9dd7 MH |
420 | } |
421 | ||
de55d871 | 422 | /** |
ab11af04 CC |
423 | * extcon_sync() - Synchronize the states for both the attached/detached |
424 | * @edev: the extcon device that has the cable. | |
74c5d09b | 425 | * |
ab11af04 CC |
426 | * This function send a notification to synchronize the all states of a |
427 | * specific external connector | |
de55d871 | 428 | */ |
ab11af04 | 429 | int extcon_sync(struct extcon_dev *edev, unsigned int id) |
de55d871 MH |
430 | { |
431 | char name_buf[120]; | |
432 | char state_buf[120]; | |
433 | char *prop_buf; | |
434 | char *envp[3]; | |
435 | int env_offset = 0; | |
436 | int length; | |
046050f6 | 437 | int index; |
ab11af04 | 438 | int state; |
806d9dd7 | 439 | unsigned long flags; |
de55d871 | 440 | |
7eae43ae CC |
441 | if (!edev) |
442 | return -EINVAL; | |
443 | ||
ab11af04 CC |
444 | index = find_cable_index_by_id(edev, id); |
445 | if (index < 0) | |
446 | return index; | |
447 | ||
806d9dd7 | 448 | spin_lock_irqsave(&edev->lock, flags); |
de55d871 | 449 | |
ab11af04 CC |
450 | state = !!(edev->state & BIT(index)); |
451 | raw_notifier_call_chain(&edev->nh[index], state, edev); | |
452 | ||
453 | /* This could be in interrupt handler */ | |
454 | prop_buf = (char *)get_zeroed_page(GFP_ATOMIC); | |
455 | if (!prop_buf) { | |
456 | /* Unlock early before uevent */ | |
806d9dd7 | 457 | spin_unlock_irqrestore(&edev->lock, flags); |
ab11af04 CC |
458 | |
459 | dev_err(&edev->dev, "out of memory in extcon_set_state\n"); | |
460 | kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE); | |
461 | ||
e7d9dd5a | 462 | return -ENOMEM; |
ab11af04 CC |
463 | } |
464 | ||
465 | length = name_show(&edev->dev, NULL, prop_buf); | |
466 | if (length > 0) { | |
467 | if (prop_buf[length - 1] == '\n') | |
468 | prop_buf[length - 1] = 0; | |
469 | snprintf(name_buf, sizeof(name_buf), "NAME=%s", prop_buf); | |
470 | envp[env_offset++] = name_buf; | |
471 | } | |
472 | ||
473 | length = state_show(&edev->dev, NULL, prop_buf); | |
474 | if (length > 0) { | |
475 | if (prop_buf[length - 1] == '\n') | |
476 | prop_buf[length - 1] = 0; | |
477 | snprintf(state_buf, sizeof(state_buf), "STATE=%s", prop_buf); | |
478 | envp[env_offset++] = state_buf; | |
de55d871 | 479 | } |
ab11af04 CC |
480 | envp[env_offset] = NULL; |
481 | ||
482 | /* Unlock early before uevent */ | |
483 | spin_unlock_irqrestore(&edev->lock, flags); | |
484 | kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp); | |
485 | free_page((unsigned long)prop_buf); | |
bde68e60 MH |
486 | |
487 | return 0; | |
de55d871 | 488 | } |
ab11af04 | 489 | EXPORT_SYMBOL_GPL(extcon_sync); |
de55d871 | 490 | |
806d9dd7 | 491 | /** |
575c2b86 | 492 | * extcon_get_state() - Get the state of a external connector. |
806d9dd7 | 493 | * @edev: the extcon device that has the cable. |
2a9de9c0 | 494 | * @id: the unique id of each external connector in extcon enumeration. |
806d9dd7 | 495 | */ |
575c2b86 | 496 | int extcon_get_state(struct extcon_dev *edev, const unsigned int id) |
806d9dd7 | 497 | { |
575c2b86 CC |
498 | int index, state; |
499 | unsigned long flags; | |
806d9dd7 | 500 | |
7eae43ae CC |
501 | if (!edev) |
502 | return -EINVAL; | |
503 | ||
2a9de9c0 CC |
504 | index = find_cable_index_by_id(edev, id); |
505 | if (index < 0) | |
506 | return index; | |
806d9dd7 | 507 | |
575c2b86 CC |
508 | spin_lock_irqsave(&edev->lock, flags); |
509 | state = is_extcon_attached(edev, index); | |
510 | spin_unlock_irqrestore(&edev->lock, flags); | |
806d9dd7 | 511 | |
575c2b86 | 512 | return state; |
806d9dd7 | 513 | } |
575c2b86 | 514 | EXPORT_SYMBOL_GPL(extcon_get_state); |
806d9dd7 | 515 | |
806d9dd7 | 516 | /** |
575c2b86 | 517 | * extcon_set_state() - Set the state of a external connector. |
ab11af04 | 518 | * without a notification. |
a75e1c73 | 519 | * @edev: the extcon device that has the cable. |
2a9de9c0 CC |
520 | * @id: the unique id of each external connector |
521 | * in extcon enumeration. | |
522 | * @state: the new cable status. The default semantics is | |
806d9dd7 | 523 | * true: attached / false: detached. |
ab11af04 CC |
524 | * |
525 | * This function only set the state of a external connector without | |
526 | * a notification. To synchronize the data of a external connector, | |
527 | * use extcon_set_state_sync() and extcon_sync(). | |
806d9dd7 | 528 | */ |
575c2b86 | 529 | int extcon_set_state(struct extcon_dev *edev, unsigned int id, |
2a9de9c0 | 530 | bool cable_state) |
806d9dd7 | 531 | { |
ab11af04 CC |
532 | unsigned long flags; |
533 | int index, ret = 0; | |
806d9dd7 | 534 | |
7eae43ae CC |
535 | if (!edev) |
536 | return -EINVAL; | |
537 | ||
2a9de9c0 CC |
538 | index = find_cable_index_by_id(edev, id); |
539 | if (index < 0) | |
540 | return index; | |
541 | ||
ab11af04 CC |
542 | spin_lock_irqsave(&edev->lock, flags); |
543 | ||
544 | /* Check whether the external connector's state is changed. */ | |
545 | if (!is_extcon_changed(edev, index, cable_state)) | |
546 | goto out; | |
547 | ||
548 | if (check_mutually_exclusive(edev, | |
549 | (edev->state & ~BIT(index)) | (cable_state & BIT(index)))) { | |
550 | ret = -EPERM; | |
551 | goto out; | |
552 | } | |
553 | ||
792e7e9e CC |
554 | /* |
555 | * Initialize the value of extcon property before setting | |
556 | * the detached state for an external connector. | |
557 | */ | |
558 | if (!cable_state) | |
559 | init_property(edev, id, index); | |
560 | ||
ab11af04 CC |
561 | /* Update the state for a external connector. */ |
562 | if (cable_state) | |
563 | edev->state |= BIT(index); | |
564 | else | |
565 | edev->state &= ~(BIT(index)); | |
566 | out: | |
567 | spin_unlock_irqrestore(&edev->lock, flags); | |
568 | ||
569 | return ret; | |
806d9dd7 | 570 | } |
575c2b86 | 571 | EXPORT_SYMBOL_GPL(extcon_set_state); |
806d9dd7 | 572 | |
ab11af04 CC |
573 | /** |
574 | * extcon_set_state_sync() - Set the state of a external connector | |
575 | * with a notification. | |
576 | * @edev: the extcon device that has the cable. | |
577 | * @id: the unique id of each external connector | |
578 | * in extcon enumeration. | |
579 | * @state: the new cable status. The default semantics is | |
580 | * true: attached / false: detached. | |
581 | * | |
582 | * This function set the state of external connector and synchronize the data | |
583 | * by usning a notification. | |
584 | */ | |
585 | int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, | |
586 | bool cable_state) | |
587 | { | |
588 | int ret, index; | |
589 | unsigned long flags; | |
590 | ||
591 | index = find_cable_index_by_id(edev, id); | |
592 | if (index < 0) | |
593 | return index; | |
594 | ||
595 | /* Check whether the external connector's state is changed. */ | |
596 | spin_lock_irqsave(&edev->lock, flags); | |
597 | ret = is_extcon_changed(edev, index, cable_state); | |
598 | spin_unlock_irqrestore(&edev->lock, flags); | |
599 | if (!ret) | |
600 | return 0; | |
601 | ||
602 | ret = extcon_set_state(edev, id, cable_state); | |
603 | if (ret < 0) | |
604 | return ret; | |
605 | ||
606 | return extcon_sync(edev, id); | |
607 | } | |
608 | EXPORT_SYMBOL_GPL(extcon_set_state_sync); | |
609 | ||
792e7e9e CC |
610 | /** |
611 | * extcon_get_property() - Get the property value of a specific cable. | |
612 | * @edev: the extcon device that has the cable. | |
613 | * @id: the unique id of each external connector | |
614 | * in extcon enumeration. | |
615 | * @prop: the property id among enum extcon_property. | |
616 | * @prop_val: the pointer which store the value of property. | |
617 | * | |
618 | * When getting the property value of external connector, the external connector | |
619 | * should be attached. If detached state, function just return 0 without | |
620 | * property value. Also, the each property should be included in the list of | |
621 | * supported properties according to the type of external connectors. | |
622 | * | |
623 | * Returns 0 if success or error number if fail | |
624 | */ | |
625 | int extcon_get_property(struct extcon_dev *edev, unsigned int id, | |
626 | unsigned int prop, | |
627 | union extcon_property_value *prop_val) | |
628 | { | |
629 | struct extcon_cable *cable; | |
630 | unsigned long flags; | |
631 | int index, ret = 0; | |
632 | ||
633 | *prop_val = (union extcon_property_value)(0); | |
634 | ||
635 | if (!edev) | |
636 | return -EINVAL; | |
637 | ||
638 | /* Check whether the property is supported or not */ | |
639 | if (!is_extcon_property_supported(id, prop)) | |
640 | return -EINVAL; | |
641 | ||
642 | /* Find the cable index of external connector by using id */ | |
643 | index = find_cable_index_by_id(edev, id); | |
644 | if (index < 0) | |
645 | return index; | |
646 | ||
647 | spin_lock_irqsave(&edev->lock, flags); | |
648 | ||
7f2a0a16 CC |
649 | /* Check whether the property is available or not. */ |
650 | if (!is_extcon_property_capability(edev, id, index, prop)) { | |
651 | spin_unlock_irqrestore(&edev->lock, flags); | |
652 | return -EPERM; | |
653 | } | |
654 | ||
792e7e9e CC |
655 | /* |
656 | * Check whether the external connector is attached. | |
657 | * If external connector is detached, the user can not | |
658 | * get the property value. | |
659 | */ | |
660 | if (!is_extcon_attached(edev, index)) { | |
661 | spin_unlock_irqrestore(&edev->lock, flags); | |
662 | return 0; | |
663 | } | |
664 | ||
665 | cable = &edev->cables[index]; | |
666 | ||
667 | /* Get the property value according to extcon type */ | |
668 | switch (prop) { | |
669 | case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: | |
670 | *prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN]; | |
671 | break; | |
672 | case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: | |
673 | *prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN]; | |
674 | break; | |
675 | case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: | |
676 | *prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN]; | |
677 | break; | |
678 | case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: | |
679 | *prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN]; | |
680 | break; | |
681 | default: | |
682 | ret = -EINVAL; | |
683 | break; | |
684 | } | |
685 | ||
686 | spin_unlock_irqrestore(&edev->lock, flags); | |
687 | ||
688 | return ret; | |
689 | } | |
690 | EXPORT_SYMBOL_GPL(extcon_get_property); | |
691 | ||
692 | /** | |
693 | * extcon_set_property() - Set the property value of a specific cable. | |
694 | * @edev: the extcon device that has the cable. | |
695 | * @id: the unique id of each external connector | |
696 | * in extcon enumeration. | |
697 | * @prop: the property id among enum extcon_property. | |
698 | * @prop_val: the pointer including the new value of property. | |
699 | * | |
700 | * The each property should be included in the list of supported properties | |
701 | * according to the type of external connectors. | |
702 | * | |
703 | * Returns 0 if success or error number if fail | |
704 | */ | |
705 | int extcon_set_property(struct extcon_dev *edev, unsigned int id, | |
706 | unsigned int prop, | |
707 | union extcon_property_value prop_val) | |
708 | { | |
709 | struct extcon_cable *cable; | |
710 | unsigned long flags; | |
711 | int index, ret = 0; | |
712 | ||
713 | if (!edev) | |
714 | return -EINVAL; | |
715 | ||
716 | /* Check whether the property is supported or not */ | |
717 | if (!is_extcon_property_supported(id, prop)) | |
718 | return -EINVAL; | |
719 | ||
720 | /* Find the cable index of external connector by using id */ | |
721 | index = find_cable_index_by_id(edev, id); | |
722 | if (index < 0) | |
723 | return index; | |
724 | ||
725 | spin_lock_irqsave(&edev->lock, flags); | |
726 | ||
7f2a0a16 CC |
727 | /* Check whether the property is available or not. */ |
728 | if (!is_extcon_property_capability(edev, id, index, prop)) { | |
729 | spin_unlock_irqrestore(&edev->lock, flags); | |
730 | return -EPERM; | |
731 | } | |
732 | ||
792e7e9e CC |
733 | cable = &edev->cables[index]; |
734 | ||
735 | /* Set the property value according to extcon type */ | |
736 | switch (prop) { | |
737 | case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: | |
738 | cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val; | |
739 | break; | |
740 | case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: | |
741 | cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val; | |
742 | break; | |
743 | case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: | |
744 | cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val; | |
745 | break; | |
746 | case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: | |
747 | cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val; | |
748 | break; | |
749 | default: | |
750 | ret = -EINVAL; | |
751 | break; | |
752 | } | |
753 | ||
754 | spin_unlock_irqrestore(&edev->lock, flags); | |
755 | ||
756 | return ret; | |
757 | } | |
758 | EXPORT_SYMBOL_GPL(extcon_set_property); | |
759 | ||
ab11af04 CC |
760 | /** |
761 | * extcon_set_property_sync() - Set the property value of a specific cable | |
762 | with a notification. | |
763 | * @prop_val: the pointer including the new value of property. | |
764 | * | |
765 | * When setting the property value of external connector, the external connector | |
766 | * should be attached. The each property should be included in the list of | |
767 | * supported properties according to the type of external connectors. | |
768 | * | |
769 | * Returns 0 if success or error number if fail | |
770 | */ | |
771 | int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id, | |
772 | unsigned int prop, | |
773 | union extcon_property_value prop_val) | |
774 | { | |
775 | int ret; | |
776 | ||
777 | ret = extcon_set_property(edev, id, prop, prop_val); | |
778 | if (ret < 0) | |
779 | return ret; | |
780 | ||
781 | return extcon_sync(edev, id); | |
782 | } | |
783 | EXPORT_SYMBOL_GPL(extcon_set_property_sync); | |
784 | ||
7f2a0a16 CC |
785 | /** |
786 | * extcon_get_property_capability() - Get the capability of property | |
787 | * of an external connector. | |
788 | * @edev: the extcon device that has the cable. | |
789 | * @id: the unique id of each external connector | |
790 | * in extcon enumeration. | |
791 | * @prop: the property id among enum extcon_property. | |
792 | * | |
793 | * Returns 1 if the property is available or 0 if not available. | |
794 | */ | |
795 | int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id, | |
796 | unsigned int prop) | |
797 | { | |
798 | int index; | |
799 | ||
800 | if (!edev) | |
801 | return -EINVAL; | |
802 | ||
803 | /* Check whether the property is supported or not */ | |
804 | if (!is_extcon_property_supported(id, prop)) | |
805 | return -EINVAL; | |
806 | ||
807 | /* Find the cable index of external connector by using id */ | |
808 | index = find_cable_index_by_id(edev, id); | |
809 | if (index < 0) | |
810 | return index; | |
811 | ||
812 | return is_extcon_property_capability(edev, id, index, prop); | |
813 | } | |
814 | EXPORT_SYMBOL_GPL(extcon_get_property_capability); | |
815 | ||
816 | /** | |
817 | * extcon_set_property_capability() - Set the capability of a property | |
818 | * of an external connector. | |
819 | * @edev: the extcon device that has the cable. | |
820 | * @id: the unique id of each external connector | |
821 | * in extcon enumeration. | |
822 | * @prop: the property id among enum extcon_property. | |
823 | * | |
824 | * This function set the capability of a property for an external connector | |
825 | * to mark the bit in capability bitmap which mean the available state of | |
826 | * a property. | |
827 | * | |
828 | * Returns 0 if success or error number if fail | |
829 | */ | |
830 | int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id, | |
831 | unsigned int prop) | |
832 | { | |
833 | struct extcon_cable *cable; | |
834 | int index, type, ret = 0; | |
835 | ||
836 | if (!edev) | |
837 | return -EINVAL; | |
838 | ||
839 | /* Check whether the property is supported or not. */ | |
840 | if (!is_extcon_property_supported(id, prop)) | |
841 | return -EINVAL; | |
842 | ||
843 | /* Find the cable index of external connector by using id. */ | |
844 | index = find_cable_index_by_id(edev, id); | |
845 | if (index < 0) | |
846 | return index; | |
847 | ||
848 | type = get_extcon_type(prop); | |
849 | if (type < 0) | |
850 | return type; | |
851 | ||
852 | cable = &edev->cables[index]; | |
853 | ||
854 | switch (type) { | |
855 | case EXTCON_TYPE_USB: | |
856 | __set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); | |
857 | break; | |
858 | case EXTCON_TYPE_CHG: | |
859 | __set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); | |
860 | break; | |
861 | case EXTCON_TYPE_JACK: | |
862 | __set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); | |
863 | break; | |
864 | case EXTCON_TYPE_DISP: | |
865 | __set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); | |
866 | break; | |
867 | default: | |
868 | ret = -EINVAL; | |
869 | } | |
870 | ||
871 | return ret; | |
872 | } | |
873 | EXPORT_SYMBOL_GPL(extcon_set_property_capability); | |
874 | ||
74c5d09b DK |
875 | /** |
876 | * extcon_get_extcon_dev() - Get the extcon device instance from the name | |
877 | * @extcon_name: The extcon name provided with extcon_dev_register() | |
878 | */ | |
879 | struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) | |
880 | { | |
881 | struct extcon_dev *sd; | |
882 | ||
7eae43ae CC |
883 | if (!extcon_name) |
884 | return ERR_PTR(-EINVAL); | |
885 | ||
74c5d09b DK |
886 | mutex_lock(&extcon_dev_list_lock); |
887 | list_for_each_entry(sd, &extcon_dev_list, entry) { | |
888 | if (!strcmp(sd->name, extcon_name)) | |
889 | goto out; | |
890 | } | |
891 | sd = NULL; | |
892 | out: | |
893 | mutex_unlock(&extcon_dev_list_lock); | |
894 | return sd; | |
895 | } | |
896 | EXPORT_SYMBOL_GPL(extcon_get_extcon_dev); | |
897 | ||
898 | /** | |
c338bb03 | 899 | * extcon_register_notifier() - Register a notifiee to get notified by |
a75e1c73 | 900 | * any attach status changes from the extcon. |
046050f6 CC |
901 | * @edev: the extcon device that has the external connecotr. |
902 | * @id: the unique id of each external connector in extcon enumeration. | |
74c5d09b | 903 | * @nb: a notifier block to be registered. |
806d9dd7 MH |
904 | * |
905 | * Note that the second parameter given to the callback of nb (val) is | |
906 | * "old_state", not the current state. The current state can be retrieved | |
907 | * by looking at the third pameter (edev pointer)'s state value. | |
74c5d09b | 908 | */ |
73b6ecdb | 909 | int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, |
046050f6 | 910 | struct notifier_block *nb) |
74c5d09b | 911 | { |
66bee35f | 912 | unsigned long flags; |
2c8116a1 | 913 | int ret, idx = -EINVAL; |
046050f6 | 914 | |
01b4c9a1 | 915 | if (!edev || !nb) |
7eae43ae CC |
916 | return -EINVAL; |
917 | ||
01b4c9a1 CC |
918 | idx = find_cable_index_by_id(edev, id); |
919 | if (idx < 0) | |
920 | return idx; | |
66bee35f | 921 | |
01b4c9a1 CC |
922 | spin_lock_irqsave(&edev->lock, flags); |
923 | ret = raw_notifier_chain_register(&edev->nh[idx], nb); | |
924 | spin_unlock_irqrestore(&edev->lock, flags); | |
66bee35f HG |
925 | |
926 | return ret; | |
74c5d09b DK |
927 | } |
928 | EXPORT_SYMBOL_GPL(extcon_register_notifier); | |
929 | ||
930 | /** | |
c338bb03 | 931 | * extcon_unregister_notifier() - Unregister a notifiee from the extcon device. |
046050f6 CC |
932 | * @edev: the extcon device that has the external connecotr. |
933 | * @id: the unique id of each external connector in extcon enumeration. | |
934 | * @nb: a notifier block to be registered. | |
74c5d09b | 935 | */ |
73b6ecdb | 936 | int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, |
046050f6 | 937 | struct notifier_block *nb) |
74c5d09b | 938 | { |
66bee35f | 939 | unsigned long flags; |
046050f6 CC |
940 | int ret, idx; |
941 | ||
7eae43ae CC |
942 | if (!edev || !nb) |
943 | return -EINVAL; | |
944 | ||
046050f6 | 945 | idx = find_cable_index_by_id(edev, id); |
a05f44c8 SB |
946 | if (idx < 0) |
947 | return idx; | |
66bee35f HG |
948 | |
949 | spin_lock_irqsave(&edev->lock, flags); | |
046050f6 | 950 | ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); |
66bee35f HG |
951 | spin_unlock_irqrestore(&edev->lock, flags); |
952 | ||
953 | return ret; | |
74c5d09b DK |
954 | } |
955 | EXPORT_SYMBOL_GPL(extcon_unregister_notifier); | |
956 | ||
af01da0e GKH |
957 | static struct attribute *extcon_attrs[] = { |
958 | &dev_attr_state.attr, | |
959 | &dev_attr_name.attr, | |
960 | NULL, | |
de55d871 | 961 | }; |
af01da0e | 962 | ATTRIBUTE_GROUPS(extcon); |
de55d871 MH |
963 | |
964 | static int create_extcon_class(void) | |
965 | { | |
966 | if (!extcon_class) { | |
967 | extcon_class = class_create(THIS_MODULE, "extcon"); | |
968 | if (IS_ERR(extcon_class)) | |
969 | return PTR_ERR(extcon_class); | |
af01da0e | 970 | extcon_class->dev_groups = extcon_groups; |
de55d871 | 971 | |
449a2bf5 | 972 | #if defined(CONFIG_ANDROID) |
de55d871 MH |
973 | switch_class = class_compat_register("switch"); |
974 | if (WARN(!switch_class, "cannot allocate")) | |
975 | return -ENOMEM; | |
449a2bf5 | 976 | #endif /* CONFIG_ANDROID */ |
de55d871 MH |
977 | } |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
de55d871 MH |
982 | static void extcon_dev_release(struct device *dev) |
983 | { | |
de55d871 MH |
984 | } |
985 | ||
bde68e60 | 986 | static const char *muex_name = "mutually_exclusive"; |
806d9dd7 MH |
987 | static void dummy_sysfs_dev_release(struct device *dev) |
988 | { | |
989 | } | |
990 | ||
a9af6522 CC |
991 | /* |
992 | * extcon_dev_allocate() - Allocate the memory of extcon device. | |
2a9de9c0 | 993 | * @supported_cable: Array of supported extcon ending with EXTCON_NONE. |
a9af6522 CC |
994 | * If supported_cable is NULL, cable name related APIs |
995 | * are disabled. | |
996 | * | |
997 | * This function allocates the memory for extcon device without allocating | |
998 | * memory in each extcon provider driver and initialize default setting for | |
999 | * extcon device. | |
1000 | * | |
1001 | * Return the pointer of extcon device if success or ERR_PTR(err) if fail | |
1002 | */ | |
73b6ecdb | 1003 | struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable) |
a9af6522 CC |
1004 | { |
1005 | struct extcon_dev *edev; | |
1006 | ||
7eae43ae CC |
1007 | if (!supported_cable) |
1008 | return ERR_PTR(-EINVAL); | |
1009 | ||
a9af6522 CC |
1010 | edev = kzalloc(sizeof(*edev), GFP_KERNEL); |
1011 | if (!edev) | |
1012 | return ERR_PTR(-ENOMEM); | |
1013 | ||
1014 | edev->max_supported = 0; | |
1015 | edev->supported_cable = supported_cable; | |
1016 | ||
1017 | return edev; | |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * extcon_dev_free() - Free the memory of extcon device. | |
1022 | * @edev: the extcon device to free | |
1023 | */ | |
1024 | void extcon_dev_free(struct extcon_dev *edev) | |
1025 | { | |
1026 | kfree(edev); | |
1027 | } | |
1028 | EXPORT_SYMBOL_GPL(extcon_dev_free); | |
1029 | ||
de55d871 MH |
1030 | /** |
1031 | * extcon_dev_register() - Register a new extcon device | |
1032 | * @edev : the new extcon device (should be allocated before calling) | |
de55d871 MH |
1033 | * |
1034 | * Among the members of edev struct, please set the "user initializing data" | |
1035 | * in any case and set the "optional callbacks" if required. However, please | |
1036 | * do not set the values of "internal data", which are initialized by | |
1037 | * this function. | |
1038 | */ | |
42d7d753 | 1039 | int extcon_dev_register(struct extcon_dev *edev) |
de55d871 | 1040 | { |
806d9dd7 | 1041 | int ret, index = 0; |
71c3ffa5 | 1042 | static atomic_t edev_no = ATOMIC_INIT(-1); |
de55d871 MH |
1043 | |
1044 | if (!extcon_class) { | |
1045 | ret = create_extcon_class(); | |
1046 | if (ret < 0) | |
1047 | return ret; | |
1048 | } | |
1049 | ||
7eae43ae | 1050 | if (!edev || !edev->supported_cable) |
2a9de9c0 CC |
1051 | return -EINVAL; |
1052 | ||
1053 | for (; edev->supported_cable[index] != EXTCON_NONE; index++); | |
806d9dd7 | 1054 | |
2a9de9c0 | 1055 | edev->max_supported = index; |
806d9dd7 | 1056 | if (index > SUPPORTED_CABLE_MAX) { |
2a9de9c0 CC |
1057 | dev_err(&edev->dev, |
1058 | "exceed the maximum number of supported cables\n"); | |
806d9dd7 MH |
1059 | return -EINVAL; |
1060 | } | |
1061 | ||
dae61651 CC |
1062 | edev->dev.class = extcon_class; |
1063 | edev->dev.release = extcon_dev_release; | |
de55d871 | 1064 | |
71c3ffa5 | 1065 | edev->name = dev_name(edev->dev.parent); |
42d7d753 CC |
1066 | if (IS_ERR_OR_NULL(edev->name)) { |
1067 | dev_err(&edev->dev, | |
1068 | "extcon device name is null\n"); | |
1069 | return -EINVAL; | |
1070 | } | |
71c3ffa5 CC |
1071 | dev_set_name(&edev->dev, "extcon%lu", |
1072 | (unsigned long)atomic_inc_return(&edev_no)); | |
806d9dd7 MH |
1073 | |
1074 | if (edev->max_supported) { | |
1075 | char buf[10]; | |
1076 | char *str; | |
1077 | struct extcon_cable *cable; | |
1078 | ||
1079 | edev->cables = kzalloc(sizeof(struct extcon_cable) * | |
1080 | edev->max_supported, GFP_KERNEL); | |
1081 | if (!edev->cables) { | |
1082 | ret = -ENOMEM; | |
1083 | goto err_sysfs_alloc; | |
1084 | } | |
1085 | for (index = 0; index < edev->max_supported; index++) { | |
1086 | cable = &edev->cables[index]; | |
1087 | ||
1088 | snprintf(buf, 10, "cable.%d", index); | |
1089 | str = kzalloc(sizeof(char) * (strlen(buf) + 1), | |
1090 | GFP_KERNEL); | |
1091 | if (!str) { | |
1092 | for (index--; index >= 0; index--) { | |
1093 | cable = &edev->cables[index]; | |
1094 | kfree(cable->attr_g.name); | |
1095 | } | |
1096 | ret = -ENOMEM; | |
1097 | ||
1098 | goto err_alloc_cables; | |
1099 | } | |
1100 | strcpy(str, buf); | |
1101 | ||
1102 | cable->edev = edev; | |
1103 | cable->cable_index = index; | |
1104 | cable->attrs[0] = &cable->attr_name.attr; | |
1105 | cable->attrs[1] = &cable->attr_state.attr; | |
1106 | cable->attrs[2] = NULL; | |
1107 | cable->attr_g.name = str; | |
1108 | cable->attr_g.attrs = cable->attrs; | |
1109 | ||
9baf3220 | 1110 | sysfs_attr_init(&cable->attr_name.attr); |
806d9dd7 MH |
1111 | cable->attr_name.attr.name = "name"; |
1112 | cable->attr_name.attr.mode = 0444; | |
1113 | cable->attr_name.show = cable_name_show; | |
1114 | ||
9baf3220 | 1115 | sysfs_attr_init(&cable->attr_state.attr); |
806d9dd7 | 1116 | cable->attr_state.attr.name = "state"; |
ea9dd9d6 | 1117 | cable->attr_state.attr.mode = 0444; |
806d9dd7 | 1118 | cable->attr_state.show = cable_state_show; |
806d9dd7 MH |
1119 | } |
1120 | } | |
1121 | ||
bde68e60 MH |
1122 | if (edev->max_supported && edev->mutually_exclusive) { |
1123 | char buf[80]; | |
1124 | char *name; | |
1125 | ||
1126 | /* Count the size of mutually_exclusive array */ | |
1127 | for (index = 0; edev->mutually_exclusive[index]; index++) | |
1128 | ; | |
1129 | ||
1130 | edev->attrs_muex = kzalloc(sizeof(struct attribute *) * | |
1131 | (index + 1), GFP_KERNEL); | |
1132 | if (!edev->attrs_muex) { | |
1133 | ret = -ENOMEM; | |
1134 | goto err_muex; | |
1135 | } | |
1136 | ||
1137 | edev->d_attrs_muex = kzalloc(sizeof(struct device_attribute) * | |
1138 | index, GFP_KERNEL); | |
1139 | if (!edev->d_attrs_muex) { | |
1140 | ret = -ENOMEM; | |
1141 | kfree(edev->attrs_muex); | |
1142 | goto err_muex; | |
1143 | } | |
1144 | ||
1145 | for (index = 0; edev->mutually_exclusive[index]; index++) { | |
1146 | sprintf(buf, "0x%x", edev->mutually_exclusive[index]); | |
1147 | name = kzalloc(sizeof(char) * (strlen(buf) + 1), | |
1148 | GFP_KERNEL); | |
1149 | if (!name) { | |
1150 | for (index--; index >= 0; index--) { | |
1151 | kfree(edev->d_attrs_muex[index].attr. | |
1152 | name); | |
1153 | } | |
1154 | kfree(edev->d_attrs_muex); | |
1155 | kfree(edev->attrs_muex); | |
1156 | ret = -ENOMEM; | |
1157 | goto err_muex; | |
1158 | } | |
1159 | strcpy(name, buf); | |
9baf3220 | 1160 | sysfs_attr_init(&edev->d_attrs_muex[index].attr); |
bde68e60 MH |
1161 | edev->d_attrs_muex[index].attr.name = name; |
1162 | edev->d_attrs_muex[index].attr.mode = 0000; | |
1163 | edev->attrs_muex[index] = &edev->d_attrs_muex[index] | |
1164 | .attr; | |
1165 | } | |
1166 | edev->attr_g_muex.name = muex_name; | |
1167 | edev->attr_g_muex.attrs = edev->attrs_muex; | |
1168 | ||
1169 | } | |
1170 | ||
806d9dd7 MH |
1171 | if (edev->max_supported) { |
1172 | edev->extcon_dev_type.groups = | |
1173 | kzalloc(sizeof(struct attribute_group *) * | |
bde68e60 | 1174 | (edev->max_supported + 2), GFP_KERNEL); |
806d9dd7 MH |
1175 | if (!edev->extcon_dev_type.groups) { |
1176 | ret = -ENOMEM; | |
1177 | goto err_alloc_groups; | |
1178 | } | |
1179 | ||
dae61651 | 1180 | edev->extcon_dev_type.name = dev_name(&edev->dev); |
806d9dd7 MH |
1181 | edev->extcon_dev_type.release = dummy_sysfs_dev_release; |
1182 | ||
1183 | for (index = 0; index < edev->max_supported; index++) | |
1184 | edev->extcon_dev_type.groups[index] = | |
1185 | &edev->cables[index].attr_g; | |
bde68e60 MH |
1186 | if (edev->mutually_exclusive) |
1187 | edev->extcon_dev_type.groups[index] = | |
1188 | &edev->attr_g_muex; | |
806d9dd7 | 1189 | |
dae61651 | 1190 | edev->dev.type = &edev->extcon_dev_type; |
806d9dd7 MH |
1191 | } |
1192 | ||
dae61651 | 1193 | ret = device_register(&edev->dev); |
de55d871 | 1194 | if (ret) { |
dae61651 | 1195 | put_device(&edev->dev); |
de55d871 MH |
1196 | goto err_dev; |
1197 | } | |
449a2bf5 | 1198 | #if defined(CONFIG_ANDROID) |
de55d871 | 1199 | if (switch_class) |
dae61651 | 1200 | ret = class_compat_create_link(switch_class, &edev->dev, NULL); |
449a2bf5 | 1201 | #endif /* CONFIG_ANDROID */ |
de55d871 | 1202 | |
806d9dd7 MH |
1203 | spin_lock_init(&edev->lock); |
1204 | ||
046050f6 CC |
1205 | edev->nh = devm_kzalloc(&edev->dev, |
1206 | sizeof(*edev->nh) * edev->max_supported, GFP_KERNEL); | |
1207 | if (!edev->nh) { | |
1208 | ret = -ENOMEM; | |
1209 | goto err_dev; | |
1210 | } | |
1211 | ||
1212 | for (index = 0; index < edev->max_supported; index++) | |
1213 | RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]); | |
74c5d09b | 1214 | |
dae61651 | 1215 | dev_set_drvdata(&edev->dev, edev); |
de55d871 | 1216 | edev->state = 0; |
74c5d09b DK |
1217 | |
1218 | mutex_lock(&extcon_dev_list_lock); | |
1219 | list_add(&edev->entry, &extcon_dev_list); | |
1220 | mutex_unlock(&extcon_dev_list_lock); | |
1221 | ||
de55d871 MH |
1222 | return 0; |
1223 | ||
1224 | err_dev: | |
806d9dd7 MH |
1225 | if (edev->max_supported) |
1226 | kfree(edev->extcon_dev_type.groups); | |
1227 | err_alloc_groups: | |
bde68e60 MH |
1228 | if (edev->max_supported && edev->mutually_exclusive) { |
1229 | for (index = 0; edev->mutually_exclusive[index]; index++) | |
1230 | kfree(edev->d_attrs_muex[index].attr.name); | |
1231 | kfree(edev->d_attrs_muex); | |
1232 | kfree(edev->attrs_muex); | |
1233 | } | |
1234 | err_muex: | |
806d9dd7 MH |
1235 | for (index = 0; index < edev->max_supported; index++) |
1236 | kfree(edev->cables[index].attr_g.name); | |
1237 | err_alloc_cables: | |
1238 | if (edev->max_supported) | |
1239 | kfree(edev->cables); | |
1240 | err_sysfs_alloc: | |
de55d871 MH |
1241 | return ret; |
1242 | } | |
1243 | EXPORT_SYMBOL_GPL(extcon_dev_register); | |
1244 | ||
1245 | /** | |
1246 | * extcon_dev_unregister() - Unregister the extcon device. | |
c338bb03 | 1247 | * @edev: the extcon device instance to be unregistered. |
de55d871 MH |
1248 | * |
1249 | * Note that this does not call kfree(edev) because edev was not allocated | |
1250 | * by this class. | |
1251 | */ | |
1252 | void extcon_dev_unregister(struct extcon_dev *edev) | |
1253 | { | |
57e7cd37 | 1254 | int index; |
1255 | ||
7eae43ae CC |
1256 | if (!edev) |
1257 | return; | |
1258 | ||
57e7cd37 | 1259 | mutex_lock(&extcon_dev_list_lock); |
1260 | list_del(&edev->entry); | |
1261 | mutex_unlock(&extcon_dev_list_lock); | |
1262 | ||
dae61651 CC |
1263 | if (IS_ERR_OR_NULL(get_device(&edev->dev))) { |
1264 | dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n", | |
1265 | dev_name(&edev->dev)); | |
57e7cd37 | 1266 | return; |
1267 | } | |
1268 | ||
7585ca0d WX |
1269 | device_unregister(&edev->dev); |
1270 | ||
57e7cd37 | 1271 | if (edev->mutually_exclusive && edev->max_supported) { |
1272 | for (index = 0; edev->mutually_exclusive[index]; | |
1273 | index++) | |
1274 | kfree(edev->d_attrs_muex[index].attr.name); | |
1275 | kfree(edev->d_attrs_muex); | |
1276 | kfree(edev->attrs_muex); | |
1277 | } | |
1278 | ||
1279 | for (index = 0; index < edev->max_supported; index++) | |
1280 | kfree(edev->cables[index].attr_g.name); | |
1281 | ||
1282 | if (edev->max_supported) { | |
1283 | kfree(edev->extcon_dev_type.groups); | |
1284 | kfree(edev->cables); | |
1285 | } | |
1286 | ||
1287 | #if defined(CONFIG_ANDROID) | |
1288 | if (switch_class) | |
dae61651 | 1289 | class_compat_remove_link(switch_class, &edev->dev, NULL); |
57e7cd37 | 1290 | #endif |
dae61651 | 1291 | put_device(&edev->dev); |
de55d871 MH |
1292 | } |
1293 | EXPORT_SYMBOL_GPL(extcon_dev_unregister); | |
1294 | ||
1ad94ffe CC |
1295 | #ifdef CONFIG_OF |
1296 | /* | |
1297 | * extcon_get_edev_by_phandle - Get the extcon device from devicetree | |
1298 | * @dev - instance to the given device | |
1299 | * @index - index into list of extcon_dev | |
1300 | * | |
1301 | * return the instance of extcon device | |
1302 | */ | |
1303 | struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) | |
1304 | { | |
1305 | struct device_node *node; | |
1306 | struct extcon_dev *edev; | |
1307 | ||
7eae43ae CC |
1308 | if (!dev) |
1309 | return ERR_PTR(-EINVAL); | |
1310 | ||
1ad94ffe | 1311 | if (!dev->of_node) { |
e8752b7a | 1312 | dev_dbg(dev, "device does not have a device node entry\n"); |
1ad94ffe CC |
1313 | return ERR_PTR(-EINVAL); |
1314 | } | |
1315 | ||
1316 | node = of_parse_phandle(dev->of_node, "extcon", index); | |
1317 | if (!node) { | |
e8752b7a | 1318 | dev_dbg(dev, "failed to get phandle in %s node\n", |
1ad94ffe CC |
1319 | dev->of_node->full_name); |
1320 | return ERR_PTR(-ENODEV); | |
1321 | } | |
1322 | ||
f841afb1 TF |
1323 | mutex_lock(&extcon_dev_list_lock); |
1324 | list_for_each_entry(edev, &extcon_dev_list, entry) { | |
1325 | if (edev->dev.parent && edev->dev.parent->of_node == node) { | |
1326 | mutex_unlock(&extcon_dev_list_lock); | |
5d5c4c13 | 1327 | of_node_put(node); |
f841afb1 TF |
1328 | return edev; |
1329 | } | |
1ad94ffe | 1330 | } |
f841afb1 | 1331 | mutex_unlock(&extcon_dev_list_lock); |
5d5c4c13 | 1332 | of_node_put(node); |
1ad94ffe | 1333 | |
f841afb1 | 1334 | return ERR_PTR(-EPROBE_DEFER); |
1ad94ffe CC |
1335 | } |
1336 | #else | |
1337 | struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) | |
1338 | { | |
1339 | return ERR_PTR(-ENOSYS); | |
1340 | } | |
1341 | #endif /* CONFIG_OF */ | |
1342 | EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); | |
1343 | ||
707d7550 CC |
1344 | /** |
1345 | * extcon_get_edev_name() - Get the name of the extcon device. | |
1346 | * @edev: the extcon device | |
1347 | */ | |
1348 | const char *extcon_get_edev_name(struct extcon_dev *edev) | |
1349 | { | |
1350 | return !edev ? NULL : edev->name; | |
1351 | } | |
1352 | ||
de55d871 MH |
1353 | static int __init extcon_class_init(void) |
1354 | { | |
1355 | return create_extcon_class(); | |
1356 | } | |
1357 | module_init(extcon_class_init); | |
1358 | ||
1359 | static void __exit extcon_class_exit(void) | |
1360 | { | |
0dc77b6d PH |
1361 | #if defined(CONFIG_ANDROID) |
1362 | class_compat_unregister(switch_class); | |
1363 | #endif | |
de55d871 MH |
1364 | class_destroy(extcon_class); |
1365 | } | |
1366 | module_exit(extcon_class_exit); | |
1367 | ||
2a9de9c0 | 1368 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); |
de55d871 MH |
1369 | MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>"); |
1370 | MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>"); | |
1371 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1372 | MODULE_DESCRIPTION("External connector (extcon) class driver"); | |
1373 | MODULE_LICENSE("GPL"); |