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eb50fd3a | 1 | // SPDX-License-Identifier: GPL-2.0 |
2870b52b RMS |
2 | /* |
3 | * Greybus Lights protocol driver. | |
4 | * | |
5 | * Copyright 2015 Google Inc. | |
6 | * Copyright 2015 Linaro Ltd. | |
2870b52b RMS |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/leds.h> | |
a7af2fe6 | 11 | #include <linux/led-class-flash.h> |
2870b52b RMS |
12 | #include <linux/module.h> |
13 | #include <linux/slab.h> | |
ec0ad868 | 14 | #include <linux/greybus.h> |
a7af2fe6 | 15 | #include <media/v4l2-flash-led-class.h> |
2870b52b | 16 | |
2870b52b RMS |
17 | #define NAMES_MAX 32 |
18 | ||
19 | struct gb_channel { | |
20 | u8 id; | |
21 | u32 flags; | |
22 | u32 color; | |
23 | char *color_name; | |
24 | u8 fade_in; | |
25 | u8 fade_out; | |
26 | u32 mode; | |
27 | char *mode_name; | |
28 | struct attribute **attrs; | |
29 | struct attribute_group *attr_group; | |
30 | const struct attribute_group **attr_groups; | |
2870b52b | 31 | struct led_classdev *led; |
a7af2fe6 | 32 | #if IS_REACHABLE(CONFIG_LEDS_CLASS_FLASH) |
2870b52b RMS |
33 | struct led_classdev_flash fled; |
34 | struct led_flash_setting intensity_uA; | |
35 | struct led_flash_setting timeout_us; | |
36 | #else | |
37 | struct led_classdev cled; | |
38 | #endif | |
39 | struct gb_light *light; | |
40 | bool is_registered; | |
41 | bool releasing; | |
42 | bool strobe_state; | |
cc43368a KH |
43 | bool active; |
44 | struct mutex lock; | |
2870b52b RMS |
45 | }; |
46 | ||
47 | struct gb_light { | |
48 | u8 id; | |
49 | char *name; | |
50 | struct gb_lights *glights; | |
51 | u32 flags; | |
52 | u8 channels_count; | |
53 | struct gb_channel *channels; | |
54 | bool has_flash; | |
c6ad27a9 | 55 | bool ready; |
a7af2fe6 | 56 | #if IS_REACHABLE(CONFIG_V4L2_FLASH_LED_CLASS) |
2870b52b | 57 | struct v4l2_flash *v4l2_flash; |
503dd28a | 58 | struct v4l2_flash *v4l2_flash_ind; |
2870b52b RMS |
59 | #endif |
60 | }; | |
61 | ||
62 | struct gb_lights { | |
63 | struct gb_connection *connection; | |
64 | u8 lights_count; | |
65 | struct gb_light *lights; | |
66 | struct mutex lights_lock; | |
67 | }; | |
68 | ||
69 | static void gb_lights_channel_free(struct gb_channel *channel); | |
70 | ||
71 | static struct gb_connection *get_conn_from_channel(struct gb_channel *channel) | |
72 | { | |
73 | return channel->light->glights->connection; | |
74 | } | |
75 | ||
76 | static struct gb_connection *get_conn_from_light(struct gb_light *light) | |
77 | { | |
78 | return light->glights->connection; | |
79 | } | |
80 | ||
81 | static bool is_channel_flash(struct gb_channel *channel) | |
82 | { | |
83 | return !!(channel->mode & (GB_CHANNEL_MODE_FLASH | GB_CHANNEL_MODE_TORCH | |
84 | | GB_CHANNEL_MODE_INDICATOR)); | |
85 | } | |
86 | ||
a7af2fe6 | 87 | #if IS_REACHABLE(CONFIG_LEDS_CLASS_FLASH) |
2870b52b RMS |
88 | static struct gb_channel *get_channel_from_cdev(struct led_classdev *cdev) |
89 | { | |
90 | struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(cdev); | |
91 | ||
92 | return container_of(fled_cdev, struct gb_channel, fled); | |
93 | } | |
94 | ||
95 | static struct led_classdev *get_channel_cdev(struct gb_channel *channel) | |
96 | { | |
97 | return &channel->fled.led_cdev; | |
98 | } | |
99 | ||
100 | static struct gb_channel *get_channel_from_mode(struct gb_light *light, | |
101 | u32 mode) | |
102 | { | |
103 | struct gb_channel *channel = NULL; | |
104 | int i; | |
105 | ||
106 | for (i = 0; i < light->channels_count; i++) { | |
107 | channel = &light->channels[i]; | |
108 | if (channel && channel->mode == mode) | |
109 | break; | |
110 | } | |
111 | return channel; | |
112 | } | |
113 | ||
114 | static int __gb_lights_flash_intensity_set(struct gb_channel *channel, | |
115 | u32 intensity) | |
116 | { | |
117 | struct gb_connection *connection = get_conn_from_channel(channel); | |
9141ad87 | 118 | struct gb_bundle *bundle = connection->bundle; |
2870b52b | 119 | struct gb_lights_set_flash_intensity_request req; |
9141ad87 | 120 | int ret; |
2870b52b RMS |
121 | |
122 | if (channel->releasing) | |
123 | return -ESHUTDOWN; | |
124 | ||
9141ad87 KH |
125 | ret = gb_pm_runtime_get_sync(bundle); |
126 | if (ret < 0) | |
127 | return ret; | |
128 | ||
2870b52b RMS |
129 | req.light_id = channel->light->id; |
130 | req.channel_id = channel->id; | |
131 | req.intensity_uA = cpu_to_le32(intensity); | |
132 | ||
9141ad87 KH |
133 | ret = gb_operation_sync(connection, GB_LIGHTS_TYPE_SET_FLASH_INTENSITY, |
134 | &req, sizeof(req), NULL, 0); | |
135 | ||
136 | gb_pm_runtime_put_autosuspend(bundle); | |
137 | ||
138 | return ret; | |
2870b52b RMS |
139 | } |
140 | ||
141 | static int __gb_lights_flash_brightness_set(struct gb_channel *channel) | |
142 | { | |
143 | u32 intensity; | |
144 | ||
145 | /* If the channel is flash we need to get the attached torch channel */ | |
146 | if (channel->mode & GB_CHANNEL_MODE_FLASH) | |
147 | channel = get_channel_from_mode(channel->light, | |
148 | GB_CHANNEL_MODE_TORCH); | |
149 | ||
150 | /* For not flash we need to convert brightness to intensity */ | |
151 | intensity = channel->intensity_uA.min + | |
152 | (channel->intensity_uA.step * channel->led->brightness); | |
153 | ||
154 | return __gb_lights_flash_intensity_set(channel, intensity); | |
155 | } | |
a7af2fe6 | 156 | #else |
2870b52b RMS |
157 | static struct gb_channel *get_channel_from_cdev(struct led_classdev *cdev) |
158 | { | |
159 | return container_of(cdev, struct gb_channel, cled); | |
160 | } | |
161 | ||
162 | static struct led_classdev *get_channel_cdev(struct gb_channel *channel) | |
163 | { | |
164 | return &channel->cled; | |
165 | } | |
166 | ||
167 | static int __gb_lights_flash_brightness_set(struct gb_channel *channel) | |
168 | { | |
169 | return 0; | |
170 | } | |
a7af2fe6 | 171 | #endif |
2870b52b | 172 | |
2870b52b RMS |
173 | static int gb_lights_color_set(struct gb_channel *channel, u32 color); |
174 | static int gb_lights_fade_set(struct gb_channel *channel); | |
175 | ||
2870b52b RMS |
176 | static void led_lock(struct led_classdev *cdev) |
177 | { | |
178 | mutex_lock(&cdev->led_access); | |
179 | } | |
180 | ||
181 | static void led_unlock(struct led_classdev *cdev) | |
182 | { | |
183 | mutex_unlock(&cdev->led_access); | |
184 | } | |
2870b52b RMS |
185 | |
186 | #define gb_lights_fade_attr(__dir) \ | |
187 | static ssize_t fade_##__dir##_show(struct device *dev, \ | |
188 | struct device_attribute *attr, \ | |
189 | char *buf) \ | |
190 | { \ | |
191 | struct led_classdev *cdev = dev_get_drvdata(dev); \ | |
192 | struct gb_channel *channel = get_channel_from_cdev(cdev); \ | |
193 | \ | |
194 | return sprintf(buf, "%u\n", channel->fade_##__dir); \ | |
195 | } \ | |
196 | \ | |
197 | static ssize_t fade_##__dir##_store(struct device *dev, \ | |
198 | struct device_attribute *attr, \ | |
199 | const char *buf, size_t size) \ | |
200 | { \ | |
201 | struct led_classdev *cdev = dev_get_drvdata(dev); \ | |
202 | struct gb_channel *channel = get_channel_from_cdev(cdev); \ | |
203 | u8 fade; \ | |
204 | int ret; \ | |
205 | \ | |
206 | led_lock(cdev); \ | |
207 | if (led_sysfs_is_disabled(cdev)) { \ | |
208 | ret = -EBUSY; \ | |
209 | goto unlock; \ | |
210 | } \ | |
211 | \ | |
212 | ret = kstrtou8(buf, 0, &fade); \ | |
213 | if (ret < 0) { \ | |
214 | dev_err(dev, "could not parse fade value %d\n", ret); \ | |
215 | goto unlock; \ | |
216 | } \ | |
217 | if (channel->fade_##__dir == fade) \ | |
218 | goto unlock; \ | |
219 | channel->fade_##__dir = fade; \ | |
220 | \ | |
221 | ret = gb_lights_fade_set(channel); \ | |
222 | if (ret < 0) \ | |
223 | goto unlock; \ | |
224 | \ | |
225 | ret = size; \ | |
226 | unlock: \ | |
227 | led_unlock(cdev); \ | |
228 | return ret; \ | |
229 | } \ | |
230 | static DEVICE_ATTR_RW(fade_##__dir) | |
231 | ||
232 | gb_lights_fade_attr(in); | |
233 | gb_lights_fade_attr(out); | |
234 | ||
235 | static ssize_t color_show(struct device *dev, struct device_attribute *attr, | |
236 | char *buf) | |
237 | { | |
238 | struct led_classdev *cdev = dev_get_drvdata(dev); | |
239 | struct gb_channel *channel = get_channel_from_cdev(cdev); | |
240 | ||
241 | return sprintf(buf, "0x%08x\n", channel->color); | |
242 | } | |
243 | ||
244 | static ssize_t color_store(struct device *dev, struct device_attribute *attr, | |
245 | const char *buf, size_t size) | |
246 | { | |
247 | struct led_classdev *cdev = dev_get_drvdata(dev); | |
248 | struct gb_channel *channel = get_channel_from_cdev(cdev); | |
249 | u32 color; | |
250 | int ret; | |
251 | ||
252 | led_lock(cdev); | |
253 | if (led_sysfs_is_disabled(cdev)) { | |
254 | ret = -EBUSY; | |
255 | goto unlock; | |
256 | } | |
257 | ret = kstrtou32(buf, 0, &color); | |
258 | if (ret < 0) { | |
259 | dev_err(dev, "could not parse color value %d\n", ret); | |
260 | goto unlock; | |
261 | } | |
262 | ||
263 | ret = gb_lights_color_set(channel, color); | |
264 | if (ret < 0) | |
265 | goto unlock; | |
266 | ||
267 | channel->color = color; | |
268 | ret = size; | |
269 | unlock: | |
270 | led_unlock(cdev); | |
271 | return ret; | |
272 | } | |
273 | static DEVICE_ATTR_RW(color); | |
274 | ||
275 | static int channel_attr_groups_set(struct gb_channel *channel, | |
276 | struct led_classdev *cdev) | |
277 | { | |
278 | int attr = 0; | |
279 | int size = 0; | |
280 | ||
281 | if (channel->flags & GB_LIGHT_CHANNEL_MULTICOLOR) | |
282 | size++; | |
283 | if (channel->flags & GB_LIGHT_CHANNEL_FADER) | |
0e352343 | 284 | size += 2; |
2870b52b RMS |
285 | |
286 | if (!size) | |
287 | return 0; | |
288 | ||
289 | /* Set attributes based in the channel flags */ | |
3855eeec | 290 | channel->attrs = kcalloc(size + 1, sizeof(*channel->attrs), GFP_KERNEL); |
2870b52b RMS |
291 | if (!channel->attrs) |
292 | return -ENOMEM; | |
6500966d | 293 | channel->attr_group = kzalloc(sizeof(*channel->attr_group), GFP_KERNEL); |
2870b52b RMS |
294 | if (!channel->attr_group) |
295 | return -ENOMEM; | |
296 | channel->attr_groups = kcalloc(2, sizeof(*channel->attr_groups), | |
297 | GFP_KERNEL); | |
298 | if (!channel->attr_groups) | |
299 | return -ENOMEM; | |
300 | ||
301 | if (channel->flags & GB_LIGHT_CHANNEL_MULTICOLOR) | |
302 | channel->attrs[attr++] = &dev_attr_color.attr; | |
303 | if (channel->flags & GB_LIGHT_CHANNEL_FADER) { | |
304 | channel->attrs[attr++] = &dev_attr_fade_in.attr; | |
305 | channel->attrs[attr++] = &dev_attr_fade_out.attr; | |
306 | } | |
307 | ||
308 | channel->attr_group->attrs = channel->attrs; | |
309 | ||
310 | channel->attr_groups[0] = channel->attr_group; | |
311 | ||
312 | cdev->groups = channel->attr_groups; | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | static int gb_lights_fade_set(struct gb_channel *channel) | |
318 | { | |
319 | struct gb_connection *connection = get_conn_from_channel(channel); | |
9141ad87 | 320 | struct gb_bundle *bundle = connection->bundle; |
2870b52b | 321 | struct gb_lights_set_fade_request req; |
9141ad87 | 322 | int ret; |
2870b52b RMS |
323 | |
324 | if (channel->releasing) | |
325 | return -ESHUTDOWN; | |
326 | ||
9141ad87 KH |
327 | ret = gb_pm_runtime_get_sync(bundle); |
328 | if (ret < 0) | |
329 | return ret; | |
330 | ||
2870b52b RMS |
331 | req.light_id = channel->light->id; |
332 | req.channel_id = channel->id; | |
333 | req.fade_in = channel->fade_in; | |
334 | req.fade_out = channel->fade_out; | |
9141ad87 KH |
335 | ret = gb_operation_sync(connection, GB_LIGHTS_TYPE_SET_FADE, |
336 | &req, sizeof(req), NULL, 0); | |
337 | ||
338 | gb_pm_runtime_put_autosuspend(bundle); | |
339 | ||
340 | return ret; | |
2870b52b RMS |
341 | } |
342 | ||
343 | static int gb_lights_color_set(struct gb_channel *channel, u32 color) | |
344 | { | |
345 | struct gb_connection *connection = get_conn_from_channel(channel); | |
9141ad87 | 346 | struct gb_bundle *bundle = connection->bundle; |
2870b52b | 347 | struct gb_lights_set_color_request req; |
9141ad87 | 348 | int ret; |
2870b52b RMS |
349 | |
350 | if (channel->releasing) | |
351 | return -ESHUTDOWN; | |
352 | ||
9141ad87 KH |
353 | ret = gb_pm_runtime_get_sync(bundle); |
354 | if (ret < 0) | |
355 | return ret; | |
356 | ||
2870b52b RMS |
357 | req.light_id = channel->light->id; |
358 | req.channel_id = channel->id; | |
359 | req.color = cpu_to_le32(color); | |
9141ad87 KH |
360 | ret = gb_operation_sync(connection, GB_LIGHTS_TYPE_SET_COLOR, |
361 | &req, sizeof(req), NULL, 0); | |
362 | ||
363 | gb_pm_runtime_put_autosuspend(bundle); | |
364 | ||
365 | return ret; | |
2870b52b | 366 | } |
2870b52b RMS |
367 | |
368 | static int __gb_lights_led_brightness_set(struct gb_channel *channel) | |
369 | { | |
370 | struct gb_lights_set_brightness_request req; | |
371 | struct gb_connection *connection = get_conn_from_channel(channel); | |
9141ad87 | 372 | struct gb_bundle *bundle = connection->bundle; |
cc43368a | 373 | bool old_active; |
9141ad87 KH |
374 | int ret; |
375 | ||
cc43368a | 376 | mutex_lock(&channel->lock); |
9141ad87 KH |
377 | ret = gb_pm_runtime_get_sync(bundle); |
378 | if (ret < 0) | |
cc43368a KH |
379 | goto out_unlock; |
380 | ||
381 | old_active = channel->active; | |
2870b52b RMS |
382 | |
383 | req.light_id = channel->light->id; | |
384 | req.channel_id = channel->id; | |
385 | req.brightness = (u8)channel->led->brightness; | |
386 | ||
9141ad87 KH |
387 | ret = gb_operation_sync(connection, GB_LIGHTS_TYPE_SET_BRIGHTNESS, |
388 | &req, sizeof(req), NULL, 0); | |
cc43368a KH |
389 | if (ret < 0) |
390 | goto out_pm_put; | |
391 | ||
392 | if (channel->led->brightness) | |
393 | channel->active = true; | |
394 | else | |
395 | channel->active = false; | |
9141ad87 | 396 | |
cc43368a KH |
397 | /* we need to keep module alive when turning to active state */ |
398 | if (!old_active && channel->active) | |
399 | goto out_unlock; | |
400 | ||
401 | /* | |
402 | * on the other hand if going to inactive we still hold a reference and | |
403 | * need to put it, so we could go to suspend. | |
404 | */ | |
405 | if (old_active && !channel->active) | |
406 | gb_pm_runtime_put_autosuspend(bundle); | |
407 | ||
408 | out_pm_put: | |
9141ad87 | 409 | gb_pm_runtime_put_autosuspend(bundle); |
cc43368a KH |
410 | out_unlock: |
411 | mutex_unlock(&channel->lock); | |
9141ad87 KH |
412 | |
413 | return ret; | |
2870b52b RMS |
414 | } |
415 | ||
416 | static int __gb_lights_brightness_set(struct gb_channel *channel) | |
417 | { | |
418 | int ret; | |
419 | ||
420 | if (channel->releasing) | |
421 | return 0; | |
422 | ||
423 | if (is_channel_flash(channel)) | |
424 | ret = __gb_lights_flash_brightness_set(channel); | |
425 | else | |
426 | ret = __gb_lights_led_brightness_set(channel); | |
427 | ||
428 | return ret; | |
429 | } | |
430 | ||
9c06c6a2 RMS |
431 | static int gb_brightness_set(struct led_classdev *cdev, |
432 | enum led_brightness value) | |
433 | { | |
434 | struct gb_channel *channel = get_channel_from_cdev(cdev); | |
435 | ||
436 | channel->led->brightness = value; | |
437 | ||
438 | return __gb_lights_brightness_set(channel); | |
439 | } | |
2870b52b RMS |
440 | |
441 | static enum led_brightness gb_brightness_get(struct led_classdev *cdev) | |
442 | ||
443 | { | |
444 | struct gb_channel *channel = get_channel_from_cdev(cdev); | |
445 | ||
446 | return channel->led->brightness; | |
447 | } | |
448 | ||
449 | static int gb_blink_set(struct led_classdev *cdev, unsigned long *delay_on, | |
450 | unsigned long *delay_off) | |
451 | { | |
452 | struct gb_channel *channel = get_channel_from_cdev(cdev); | |
453 | struct gb_connection *connection = get_conn_from_channel(channel); | |
9141ad87 | 454 | struct gb_bundle *bundle = connection->bundle; |
2870b52b | 455 | struct gb_lights_blink_request req; |
cc43368a | 456 | bool old_active; |
9141ad87 | 457 | int ret; |
2870b52b RMS |
458 | |
459 | if (channel->releasing) | |
460 | return -ESHUTDOWN; | |
461 | ||
dc875c77 RMS |
462 | if (!delay_on || !delay_off) |
463 | return -EINVAL; | |
464 | ||
cc43368a | 465 | mutex_lock(&channel->lock); |
9141ad87 KH |
466 | ret = gb_pm_runtime_get_sync(bundle); |
467 | if (ret < 0) | |
cc43368a KH |
468 | goto out_unlock; |
469 | ||
470 | old_active = channel->active; | |
9141ad87 | 471 | |
2870b52b RMS |
472 | req.light_id = channel->light->id; |
473 | req.channel_id = channel->id; | |
474 | req.time_on_ms = cpu_to_le16(*delay_on); | |
475 | req.time_off_ms = cpu_to_le16(*delay_off); | |
476 | ||
9141ad87 KH |
477 | ret = gb_operation_sync(connection, GB_LIGHTS_TYPE_SET_BLINK, &req, |
478 | sizeof(req), NULL, 0); | |
cc43368a KH |
479 | if (ret < 0) |
480 | goto out_pm_put; | |
481 | ||
5cf62679 | 482 | if (*delay_on) |
cc43368a KH |
483 | channel->active = true; |
484 | else | |
485 | channel->active = false; | |
486 | ||
487 | /* we need to keep module alive when turning to active state */ | |
488 | if (!old_active && channel->active) | |
489 | goto out_unlock; | |
9141ad87 | 490 | |
cc43368a KH |
491 | /* |
492 | * on the other hand if going to inactive we still hold a reference and | |
493 | * need to put it, so we could go to suspend. | |
494 | */ | |
495 | if (old_active && !channel->active) | |
496 | gb_pm_runtime_put_autosuspend(bundle); | |
497 | ||
498 | out_pm_put: | |
9141ad87 | 499 | gb_pm_runtime_put_autosuspend(bundle); |
cc43368a KH |
500 | out_unlock: |
501 | mutex_unlock(&channel->lock); | |
9141ad87 KH |
502 | |
503 | return ret; | |
2870b52b RMS |
504 | } |
505 | ||
506 | static void gb_lights_led_operations_set(struct gb_channel *channel, | |
507 | struct led_classdev *cdev) | |
508 | { | |
2870b52b | 509 | cdev->brightness_get = gb_brightness_get; |
9c06c6a2 | 510 | cdev->brightness_set_blocking = gb_brightness_set; |
2870b52b RMS |
511 | |
512 | if (channel->flags & GB_LIGHT_CHANNEL_BLINK) | |
513 | cdev->blink_set = gb_blink_set; | |
514 | } | |
515 | ||
a7af2fe6 | 516 | #if IS_REACHABLE(CONFIG_V4L2_FLASH_LED_CLASS) |
2870b52b | 517 | /* V4L2 specific helpers */ |
3f85c787 RMS |
518 | static const struct v4l2_flash_ops v4l2_flash_ops; |
519 | ||
2870b52b RMS |
520 | static void __gb_lights_channel_v4l2_config(struct led_flash_setting *channel_s, |
521 | struct led_flash_setting *v4l2_s) | |
522 | { | |
523 | v4l2_s->min = channel_s->min; | |
524 | v4l2_s->max = channel_s->max; | |
525 | v4l2_s->step = channel_s->step; | |
526 | /* For v4l2 val is the default value */ | |
527 | v4l2_s->val = channel_s->max; | |
528 | } | |
529 | ||
530 | static int gb_lights_light_v4l2_register(struct gb_light *light) | |
531 | { | |
532 | struct gb_connection *connection = get_conn_from_light(light); | |
5fd18b37 | 533 | struct device *dev = &connection->bundle->dev; |
503dd28a | 534 | struct v4l2_flash_config sd_cfg = { {0} }, sd_cfg_ind = { {0} }; |
2870b52b | 535 | struct led_classdev_flash *fled; |
85f7ff97 | 536 | struct led_classdev *iled = NULL; |
2870b52b | 537 | struct gb_channel *channel_torch, *channel_ind, *channel_flash; |
2870b52b RMS |
538 | |
539 | channel_torch = get_channel_from_mode(light, GB_CHANNEL_MODE_TORCH); | |
540 | if (channel_torch) | |
541 | __gb_lights_channel_v4l2_config(&channel_torch->intensity_uA, | |
503dd28a | 542 | &sd_cfg.intensity); |
2870b52b RMS |
543 | |
544 | channel_ind = get_channel_from_mode(light, GB_CHANNEL_MODE_INDICATOR); | |
545 | if (channel_ind) { | |
546 | __gb_lights_channel_v4l2_config(&channel_ind->intensity_uA, | |
503dd28a | 547 | &sd_cfg_ind.intensity); |
85f7ff97 | 548 | iled = &channel_ind->fled.led_cdev; |
2870b52b RMS |
549 | } |
550 | ||
551 | channel_flash = get_channel_from_mode(light, GB_CHANNEL_MODE_FLASH); | |
552 | WARN_ON(!channel_flash); | |
553 | ||
554 | fled = &channel_flash->fled; | |
555 | ||
428359cb | 556 | snprintf(sd_cfg.dev_name, sizeof(sd_cfg.dev_name), "%s", light->name); |
503dd28a SA |
557 | snprintf(sd_cfg_ind.dev_name, sizeof(sd_cfg_ind.dev_name), |
558 | "%s indicator", light->name); | |
2870b52b RMS |
559 | |
560 | /* Set the possible values to faults, in our case all faults */ | |
428359cb | 561 | sd_cfg.flash_faults = LED_FAULT_OVER_VOLTAGE | LED_FAULT_TIMEOUT | |
2870b52b RMS |
562 | LED_FAULT_OVER_TEMPERATURE | LED_FAULT_SHORT_CIRCUIT | |
563 | LED_FAULT_OVER_CURRENT | LED_FAULT_INDICATOR | | |
564 | LED_FAULT_UNDER_VOLTAGE | LED_FAULT_INPUT_VOLTAGE | | |
565 | LED_FAULT_LED_OVER_TEMPERATURE; | |
566 | ||
503dd28a SA |
567 | light->v4l2_flash = v4l2_flash_init(dev, NULL, fled, &v4l2_flash_ops, |
568 | &sd_cfg); | |
428359cb RMS |
569 | if (IS_ERR(light->v4l2_flash)) |
570 | return PTR_ERR(light->v4l2_flash); | |
2870b52b | 571 | |
503dd28a SA |
572 | if (channel_ind) { |
573 | light->v4l2_flash_ind = | |
574 | v4l2_flash_indicator_init(dev, NULL, iled, &sd_cfg_ind); | |
575 | if (IS_ERR(light->v4l2_flash_ind)) { | |
576 | v4l2_flash_release(light->v4l2_flash); | |
577 | return PTR_ERR(light->v4l2_flash_ind); | |
578 | } | |
579 | } | |
580 | ||
428359cb | 581 | return 0; |
2870b52b RMS |
582 | } |
583 | ||
584 | static void gb_lights_light_v4l2_unregister(struct gb_light *light) | |
585 | { | |
503dd28a | 586 | v4l2_flash_release(light->v4l2_flash_ind); |
2870b52b RMS |
587 | v4l2_flash_release(light->v4l2_flash); |
588 | } | |
589 | #else | |
590 | static int gb_lights_light_v4l2_register(struct gb_light *light) | |
591 | { | |
592 | struct gb_connection *connection = get_conn_from_light(light); | |
593 | ||
5fd18b37 | 594 | dev_err(&connection->bundle->dev, "no support for v4l2 subdevices\n"); |
2870b52b RMS |
595 | return 0; |
596 | } | |
597 | ||
598 | static void gb_lights_light_v4l2_unregister(struct gb_light *light) | |
599 | { | |
600 | } | |
601 | #endif | |
602 | ||
a7af2fe6 | 603 | #if IS_REACHABLE(CONFIG_LEDS_CLASS_FLASH) |
2870b52b RMS |
604 | /* Flash specific operations */ |
605 | static int gb_lights_flash_intensity_set(struct led_classdev_flash *fcdev, | |
606 | u32 brightness) | |
607 | { | |
608 | struct gb_channel *channel = container_of(fcdev, struct gb_channel, | |
609 | fled); | |
610 | int ret; | |
611 | ||
612 | ret = __gb_lights_flash_intensity_set(channel, brightness); | |
613 | if (ret < 0) | |
614 | return ret; | |
615 | ||
616 | fcdev->brightness.val = brightness; | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | static int gb_lights_flash_intensity_get(struct led_classdev_flash *fcdev, | |
622 | u32 *brightness) | |
623 | { | |
624 | *brightness = fcdev->brightness.val; | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
629 | static int gb_lights_flash_strobe_set(struct led_classdev_flash *fcdev, | |
630 | bool state) | |
631 | { | |
632 | struct gb_channel *channel = container_of(fcdev, struct gb_channel, | |
633 | fled); | |
634 | struct gb_connection *connection = get_conn_from_channel(channel); | |
9141ad87 | 635 | struct gb_bundle *bundle = connection->bundle; |
2870b52b RMS |
636 | struct gb_lights_set_flash_strobe_request req; |
637 | int ret; | |
638 | ||
639 | if (channel->releasing) | |
640 | return -ESHUTDOWN; | |
641 | ||
9141ad87 KH |
642 | ret = gb_pm_runtime_get_sync(bundle); |
643 | if (ret < 0) | |
644 | return ret; | |
645 | ||
2870b52b RMS |
646 | req.light_id = channel->light->id; |
647 | req.channel_id = channel->id; | |
648 | req.state = state ? 1 : 0; | |
649 | ||
650 | ret = gb_operation_sync(connection, GB_LIGHTS_TYPE_SET_FLASH_STROBE, | |
651 | &req, sizeof(req), NULL, 0); | |
9141ad87 KH |
652 | if (!ret) |
653 | channel->strobe_state = state; | |
2870b52b | 654 | |
9141ad87 KH |
655 | gb_pm_runtime_put_autosuspend(bundle); |
656 | ||
657 | return ret; | |
2870b52b RMS |
658 | } |
659 | ||
660 | static int gb_lights_flash_strobe_get(struct led_classdev_flash *fcdev, | |
661 | bool *state) | |
662 | { | |
663 | struct gb_channel *channel = container_of(fcdev, struct gb_channel, | |
664 | fled); | |
665 | ||
666 | *state = channel->strobe_state; | |
667 | return 0; | |
668 | } | |
669 | ||
670 | static int gb_lights_flash_timeout_set(struct led_classdev_flash *fcdev, | |
671 | u32 timeout) | |
672 | { | |
673 | struct gb_channel *channel = container_of(fcdev, struct gb_channel, | |
674 | fled); | |
675 | struct gb_connection *connection = get_conn_from_channel(channel); | |
9141ad87 | 676 | struct gb_bundle *bundle = connection->bundle; |
2870b52b RMS |
677 | struct gb_lights_set_flash_timeout_request req; |
678 | int ret; | |
679 | ||
680 | if (channel->releasing) | |
681 | return -ESHUTDOWN; | |
682 | ||
9141ad87 KH |
683 | ret = gb_pm_runtime_get_sync(bundle); |
684 | if (ret < 0) | |
685 | return ret; | |
686 | ||
2870b52b RMS |
687 | req.light_id = channel->light->id; |
688 | req.channel_id = channel->id; | |
689 | req.timeout_us = cpu_to_le32(timeout); | |
690 | ||
691 | ret = gb_operation_sync(connection, GB_LIGHTS_TYPE_SET_FLASH_TIMEOUT, | |
692 | &req, sizeof(req), NULL, 0); | |
9141ad87 KH |
693 | if (!ret) |
694 | fcdev->timeout.val = timeout; | |
2870b52b | 695 | |
9141ad87 KH |
696 | gb_pm_runtime_put_autosuspend(bundle); |
697 | ||
698 | return ret; | |
2870b52b RMS |
699 | } |
700 | ||
701 | static int gb_lights_flash_fault_get(struct led_classdev_flash *fcdev, | |
702 | u32 *fault) | |
703 | { | |
704 | struct gb_channel *channel = container_of(fcdev, struct gb_channel, | |
705 | fled); | |
706 | struct gb_connection *connection = get_conn_from_channel(channel); | |
9141ad87 | 707 | struct gb_bundle *bundle = connection->bundle; |
2870b52b RMS |
708 | struct gb_lights_get_flash_fault_request req; |
709 | struct gb_lights_get_flash_fault_response resp; | |
710 | int ret; | |
711 | ||
712 | if (channel->releasing) | |
713 | return -ESHUTDOWN; | |
714 | ||
9141ad87 KH |
715 | ret = gb_pm_runtime_get_sync(bundle); |
716 | if (ret < 0) | |
717 | return ret; | |
718 | ||
2870b52b RMS |
719 | req.light_id = channel->light->id; |
720 | req.channel_id = channel->id; | |
721 | ||
722 | ret = gb_operation_sync(connection, GB_LIGHTS_TYPE_GET_FLASH_FAULT, | |
723 | &req, sizeof(req), &resp, sizeof(resp)); | |
9141ad87 KH |
724 | if (!ret) |
725 | *fault = le32_to_cpu(resp.fault); | |
2870b52b | 726 | |
9141ad87 | 727 | gb_pm_runtime_put_autosuspend(bundle); |
2870b52b | 728 | |
9141ad87 | 729 | return ret; |
2870b52b RMS |
730 | } |
731 | ||
732 | static const struct led_flash_ops gb_lights_flash_ops = { | |
733 | .flash_brightness_set = gb_lights_flash_intensity_set, | |
734 | .flash_brightness_get = gb_lights_flash_intensity_get, | |
735 | .strobe_set = gb_lights_flash_strobe_set, | |
736 | .strobe_get = gb_lights_flash_strobe_get, | |
737 | .timeout_set = gb_lights_flash_timeout_set, | |
738 | .fault_get = gb_lights_flash_fault_get, | |
739 | }; | |
740 | ||
741 | static int __gb_lights_channel_torch_attach(struct gb_channel *channel, | |
742 | struct gb_channel *channel_torch) | |
743 | { | |
744 | char *name; | |
745 | ||
746 | /* we can only attach torch to a flash channel */ | |
747 | if (!(channel->mode & GB_CHANNEL_MODE_FLASH)) | |
748 | return 0; | |
749 | ||
750 | /* Move torch brightness to the destination */ | |
751 | channel->led->max_brightness = channel_torch->led->max_brightness; | |
752 | ||
753 | /* append mode name to flash name */ | |
754 | name = kasprintf(GFP_KERNEL, "%s_%s", channel->led->name, | |
755 | channel_torch->mode_name); | |
756 | if (!name) | |
757 | return -ENOMEM; | |
758 | kfree(channel->led->name); | |
759 | channel->led->name = name; | |
760 | ||
2870b52b RMS |
761 | channel_torch->led = channel->led; |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
766 | static int __gb_lights_flash_led_register(struct gb_channel *channel) | |
767 | { | |
768 | struct gb_connection *connection = get_conn_from_channel(channel); | |
769 | struct led_classdev_flash *fled = &channel->fled; | |
770 | struct led_flash_setting *fset; | |
771 | struct gb_channel *channel_torch; | |
772 | int ret; | |
773 | ||
774 | fled->ops = &gb_lights_flash_ops; | |
775 | ||
776 | fled->led_cdev.flags |= LED_DEV_CAP_FLASH; | |
777 | ||
778 | fset = &fled->brightness; | |
779 | fset->min = channel->intensity_uA.min; | |
780 | fset->max = channel->intensity_uA.max; | |
781 | fset->step = channel->intensity_uA.step; | |
1700507d | 782 | fset->val = channel->intensity_uA.max; |
2870b52b RMS |
783 | |
784 | /* Only the flash mode have the timeout constraints settings */ | |
785 | if (channel->mode & GB_CHANNEL_MODE_FLASH) { | |
786 | fset = &fled->timeout; | |
787 | fset->min = channel->timeout_us.min; | |
788 | fset->max = channel->timeout_us.max; | |
789 | fset->step = channel->timeout_us.step; | |
1700507d | 790 | fset->val = channel->timeout_us.max; |
2870b52b RMS |
791 | } |
792 | ||
793 | /* | |
794 | * If light have torch mode channel, this channel will be the led | |
795 | * classdev of the registered above flash classdev | |
796 | */ | |
797 | channel_torch = get_channel_from_mode(channel->light, | |
798 | GB_CHANNEL_MODE_TORCH); | |
799 | if (channel_torch) { | |
800 | ret = __gb_lights_channel_torch_attach(channel, channel_torch); | |
801 | if (ret < 0) | |
802 | goto fail; | |
803 | } | |
804 | ||
f865734d | 805 | ret = led_classdev_flash_register(&connection->bundle->dev, fled); |
2870b52b RMS |
806 | if (ret < 0) |
807 | goto fail; | |
808 | ||
809 | channel->is_registered = true; | |
810 | return 0; | |
811 | fail: | |
812 | channel->led = NULL; | |
813 | return ret; | |
814 | } | |
815 | ||
816 | static void __gb_lights_flash_led_unregister(struct gb_channel *channel) | |
817 | { | |
818 | if (!channel->is_registered) | |
819 | return; | |
820 | ||
821 | led_classdev_flash_unregister(&channel->fled); | |
822 | } | |
823 | ||
824 | static int gb_lights_channel_flash_config(struct gb_channel *channel) | |
825 | { | |
826 | struct gb_connection *connection = get_conn_from_channel(channel); | |
827 | struct gb_lights_get_channel_flash_config_request req; | |
828 | struct gb_lights_get_channel_flash_config_response conf; | |
829 | struct led_flash_setting *fset; | |
830 | int ret; | |
831 | ||
832 | req.light_id = channel->light->id; | |
833 | req.channel_id = channel->id; | |
834 | ||
835 | ret = gb_operation_sync(connection, | |
836 | GB_LIGHTS_TYPE_GET_CHANNEL_FLASH_CONFIG, | |
837 | &req, sizeof(req), &conf, sizeof(conf)); | |
838 | if (ret < 0) | |
839 | return ret; | |
840 | ||
841 | /* | |
842 | * Intensity constraints for flash related modes: flash, torch, | |
843 | * indicator. They will be needed for v4l2 registration. | |
844 | */ | |
845 | fset = &channel->intensity_uA; | |
846 | fset->min = le32_to_cpu(conf.intensity_min_uA); | |
847 | fset->max = le32_to_cpu(conf.intensity_max_uA); | |
848 | fset->step = le32_to_cpu(conf.intensity_step_uA); | |
849 | ||
850 | /* | |
851 | * On flash type, max brightness is set as the number of intensity steps | |
852 | * available. | |
853 | */ | |
854 | channel->led->max_brightness = (fset->max - fset->min) / fset->step; | |
855 | ||
856 | /* Only the flash mode have the timeout constraints settings */ | |
857 | if (channel->mode & GB_CHANNEL_MODE_FLASH) { | |
858 | fset = &channel->timeout_us; | |
859 | fset->min = le32_to_cpu(conf.timeout_min_us); | |
860 | fset->max = le32_to_cpu(conf.timeout_max_us); | |
861 | fset->step = le32_to_cpu(conf.timeout_step_us); | |
862 | } | |
863 | ||
864 | return 0; | |
865 | } | |
866 | #else | |
867 | static int gb_lights_channel_flash_config(struct gb_channel *channel) | |
868 | { | |
869 | struct gb_connection *connection = get_conn_from_channel(channel); | |
870 | ||
5fd18b37 | 871 | dev_err(&connection->bundle->dev, "no support for flash devices\n"); |
2870b52b RMS |
872 | return 0; |
873 | } | |
874 | ||
875 | static int __gb_lights_flash_led_register(struct gb_channel *channel) | |
876 | { | |
877 | return 0; | |
878 | } | |
879 | ||
880 | static void __gb_lights_flash_led_unregister(struct gb_channel *channel) | |
881 | { | |
882 | } | |
883 | ||
a7af2fe6 | 884 | #endif |
2870b52b RMS |
885 | |
886 | static int __gb_lights_led_register(struct gb_channel *channel) | |
887 | { | |
888 | struct gb_connection *connection = get_conn_from_channel(channel); | |
889 | struct led_classdev *cdev = get_channel_cdev(channel); | |
890 | int ret; | |
891 | ||
f865734d | 892 | ret = led_classdev_register(&connection->bundle->dev, cdev); |
2870b52b RMS |
893 | if (ret < 0) |
894 | channel->led = NULL; | |
895 | else | |
896 | channel->is_registered = true; | |
897 | return ret; | |
898 | } | |
899 | ||
900 | static int gb_lights_channel_register(struct gb_channel *channel) | |
901 | { | |
902 | /* Normal LED channel, just register in led classdev and we are done */ | |
903 | if (!is_channel_flash(channel)) | |
904 | return __gb_lights_led_register(channel); | |
905 | ||
906 | /* | |
907 | * Flash Type need more work, register flash classdev, indicator as | |
908 | * flash classdev, torch will be led classdev of the flash classdev. | |
909 | */ | |
910 | if (!(channel->mode & GB_CHANNEL_MODE_TORCH)) | |
911 | return __gb_lights_flash_led_register(channel); | |
912 | ||
913 | return 0; | |
914 | } | |
915 | ||
916 | static void __gb_lights_led_unregister(struct gb_channel *channel) | |
917 | { | |
918 | struct led_classdev *cdev = get_channel_cdev(channel); | |
919 | ||
920 | if (!channel->is_registered) | |
921 | return; | |
922 | ||
923 | led_classdev_unregister(cdev); | |
04820da2 AY |
924 | kfree(cdev->name); |
925 | cdev->name = NULL; | |
2870b52b RMS |
926 | channel->led = NULL; |
927 | } | |
928 | ||
929 | static void gb_lights_channel_unregister(struct gb_channel *channel) | |
930 | { | |
931 | /* The same as register, handle channels differently */ | |
932 | if (!is_channel_flash(channel)) { | |
933 | __gb_lights_led_unregister(channel); | |
934 | return; | |
935 | } | |
936 | ||
937 | if (channel->mode & GB_CHANNEL_MODE_TORCH) | |
938 | __gb_lights_led_unregister(channel); | |
939 | else | |
940 | __gb_lights_flash_led_unregister(channel); | |
941 | } | |
942 | ||
943 | static int gb_lights_channel_config(struct gb_light *light, | |
944 | struct gb_channel *channel) | |
945 | { | |
946 | struct gb_lights_get_channel_config_response conf; | |
947 | struct gb_lights_get_channel_config_request req; | |
948 | struct gb_connection *connection = get_conn_from_light(light); | |
949 | struct led_classdev *cdev = get_channel_cdev(channel); | |
950 | char *name; | |
951 | int ret; | |
952 | ||
953 | req.light_id = light->id; | |
954 | req.channel_id = channel->id; | |
955 | ||
956 | ret = gb_operation_sync(connection, GB_LIGHTS_TYPE_GET_CHANNEL_CONFIG, | |
957 | &req, sizeof(req), &conf, sizeof(conf)); | |
958 | if (ret < 0) | |
959 | return ret; | |
960 | ||
961 | channel->light = light; | |
962 | channel->mode = le32_to_cpu(conf.mode); | |
963 | channel->flags = le32_to_cpu(conf.flags); | |
964 | channel->color = le32_to_cpu(conf.color); | |
965 | channel->color_name = kstrndup(conf.color_name, NAMES_MAX, GFP_KERNEL); | |
966 | if (!channel->color_name) | |
967 | return -ENOMEM; | |
968 | channel->mode_name = kstrndup(conf.mode_name, NAMES_MAX, GFP_KERNEL); | |
969 | if (!channel->mode_name) | |
970 | return -ENOMEM; | |
971 | ||
972 | channel->led = cdev; | |
973 | ||
974 | name = kasprintf(GFP_KERNEL, "%s:%s:%s", light->name, | |
975 | channel->color_name, channel->mode_name); | |
976 | if (!name) | |
977 | return -ENOMEM; | |
978 | ||
979 | cdev->name = name; | |
980 | ||
981 | cdev->max_brightness = conf.max_brightness; | |
982 | ||
983 | ret = channel_attr_groups_set(channel, cdev); | |
984 | if (ret < 0) | |
985 | return ret; | |
986 | ||
987 | gb_lights_led_operations_set(channel, cdev); | |
988 | ||
989 | /* | |
990 | * If it is not a flash related channel (flash, torch or indicator) we | |
991 | * are done here. If not, continue and fetch flash related | |
992 | * configurations. | |
993 | */ | |
994 | if (!is_channel_flash(channel)) | |
995 | return ret; | |
996 | ||
997 | light->has_flash = true; | |
998 | ||
1cd5929a | 999 | return gb_lights_channel_flash_config(channel); |
2870b52b RMS |
1000 | } |
1001 | ||
1002 | static int gb_lights_light_config(struct gb_lights *glights, u8 id) | |
1003 | { | |
1004 | struct gb_light *light = &glights->lights[id]; | |
1005 | struct gb_lights_get_light_config_request req; | |
1006 | struct gb_lights_get_light_config_response conf; | |
1007 | int ret; | |
1008 | int i; | |
1009 | ||
1010 | light->glights = glights; | |
1011 | light->id = id; | |
1012 | ||
1013 | req.id = id; | |
1014 | ||
1015 | ret = gb_operation_sync(glights->connection, | |
1016 | GB_LIGHTS_TYPE_GET_LIGHT_CONFIG, | |
1017 | &req, sizeof(req), &conf, sizeof(conf)); | |
1018 | if (ret < 0) | |
1019 | return ret; | |
1020 | ||
1021 | if (!conf.channel_count) | |
1022 | return -EINVAL; | |
1023 | if (!strlen(conf.name)) | |
1024 | return -EINVAL; | |
1025 | ||
1026 | light->channels_count = conf.channel_count; | |
1027 | light->name = kstrndup(conf.name, NAMES_MAX, GFP_KERNEL); | |
9bb086e5 CZ |
1028 | if (!light->name) |
1029 | return -ENOMEM; | |
3036d0e2 | 1030 | light->channels = kcalloc(light->channels_count, |
2870b52b RMS |
1031 | sizeof(struct gb_channel), GFP_KERNEL); |
1032 | if (!light->channels) | |
1033 | return -ENOMEM; | |
1034 | ||
1035 | /* First we collect all the configurations for all channels */ | |
1036 | for (i = 0; i < light->channels_count; i++) { | |
1037 | light->channels[i].id = i; | |
1038 | ret = gb_lights_channel_config(light, &light->channels[i]); | |
1039 | if (ret < 0) | |
1040 | return ret; | |
1041 | } | |
1042 | ||
6ce0eed7 VK |
1043 | return 0; |
1044 | } | |
1045 | ||
1046 | static int gb_lights_light_register(struct gb_light *light) | |
1047 | { | |
1048 | int ret; | |
1049 | int i; | |
1050 | ||
2870b52b RMS |
1051 | /* |
1052 | * Then, if everything went ok in getting configurations, we register | |
1053 | * the classdev, flash classdev and v4l2 subsystem, if a flash device is | |
1054 | * found. | |
1055 | */ | |
1056 | for (i = 0; i < light->channels_count; i++) { | |
1057 | ret = gb_lights_channel_register(&light->channels[i]); | |
1058 | if (ret < 0) | |
1059 | return ret; | |
cc43368a KH |
1060 | |
1061 | mutex_init(&light->channels[i].lock); | |
2870b52b RMS |
1062 | } |
1063 | ||
c6ad27a9 RMS |
1064 | light->ready = true; |
1065 | ||
2870b52b RMS |
1066 | if (light->has_flash) { |
1067 | ret = gb_lights_light_v4l2_register(light); | |
137f7179 RMS |
1068 | if (ret < 0) { |
1069 | light->has_flash = false; | |
2870b52b | 1070 | return ret; |
137f7179 | 1071 | } |
2870b52b RMS |
1072 | } |
1073 | ||
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | static void gb_lights_channel_free(struct gb_channel *channel) | |
1078 | { | |
2870b52b RMS |
1079 | kfree(channel->attrs); |
1080 | kfree(channel->attr_group); | |
1081 | kfree(channel->attr_groups); | |
1082 | kfree(channel->color_name); | |
1083 | kfree(channel->mode_name); | |
cc43368a | 1084 | mutex_destroy(&channel->lock); |
2870b52b RMS |
1085 | } |
1086 | ||
1087 | static void gb_lights_channel_release(struct gb_channel *channel) | |
1088 | { | |
2870b52b RMS |
1089 | channel->releasing = true; |
1090 | ||
1091 | gb_lights_channel_unregister(channel); | |
1092 | ||
1093 | gb_lights_channel_free(channel); | |
1094 | } | |
1095 | ||
1096 | static void gb_lights_light_release(struct gb_light *light) | |
1097 | { | |
1098 | int i; | |
2870b52b | 1099 | |
c6ad27a9 | 1100 | light->ready = false; |
2870b52b | 1101 | |
2870b52b RMS |
1102 | if (light->has_flash) |
1103 | gb_lights_light_v4l2_unregister(light); | |
32910124 | 1104 | light->has_flash = false; |
2870b52b | 1105 | |
32910124 | 1106 | for (i = 0; i < light->channels_count; i++) |
2870b52b | 1107 | gb_lights_channel_release(&light->channels[i]); |
32910124 DC |
1108 | light->channels_count = 0; |
1109 | ||
2870b52b | 1110 | kfree(light->channels); |
32910124 | 1111 | light->channels = NULL; |
2870b52b | 1112 | kfree(light->name); |
32910124 | 1113 | light->name = NULL; |
2870b52b RMS |
1114 | } |
1115 | ||
1116 | static void gb_lights_release(struct gb_lights *glights) | |
1117 | { | |
1118 | int i; | |
1119 | ||
1120 | if (!glights) | |
1121 | return; | |
1122 | ||
1123 | mutex_lock(&glights->lights_lock); | |
1124 | if (!glights->lights) | |
1125 | goto free_glights; | |
1126 | ||
1127 | for (i = 0; i < glights->lights_count; i++) | |
1128 | gb_lights_light_release(&glights->lights[i]); | |
1129 | ||
1130 | kfree(glights->lights); | |
1131 | ||
1132 | free_glights: | |
1133 | mutex_unlock(&glights->lights_lock); | |
1134 | mutex_destroy(&glights->lights_lock); | |
1135 | kfree(glights); | |
1136 | } | |
1137 | ||
1138 | static int gb_lights_get_count(struct gb_lights *glights) | |
1139 | { | |
1140 | struct gb_lights_get_lights_response resp; | |
1141 | int ret; | |
1142 | ||
1143 | ret = gb_operation_sync(glights->connection, GB_LIGHTS_TYPE_GET_LIGHTS, | |
1144 | NULL, 0, &resp, sizeof(resp)); | |
1145 | if (ret < 0) | |
1146 | return ret; | |
1147 | ||
1148 | if (!resp.lights_count) | |
1149 | return -EINVAL; | |
1150 | ||
1151 | glights->lights_count = resp.lights_count; | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
6ce0eed7 | 1156 | static int gb_lights_create_all(struct gb_lights *glights) |
2870b52b RMS |
1157 | { |
1158 | struct gb_connection *connection = glights->connection; | |
1159 | int ret; | |
1160 | int i; | |
1161 | ||
1162 | mutex_lock(&glights->lights_lock); | |
1163 | ret = gb_lights_get_count(glights); | |
1164 | if (ret < 0) | |
1165 | goto out; | |
1166 | ||
3036d0e2 | 1167 | glights->lights = kcalloc(glights->lights_count, |
2870b52b RMS |
1168 | sizeof(struct gb_light), GFP_KERNEL); |
1169 | if (!glights->lights) { | |
1170 | ret = -ENOMEM; | |
1171 | goto out; | |
1172 | } | |
1173 | ||
1174 | for (i = 0; i < glights->lights_count; i++) { | |
1175 | ret = gb_lights_light_config(glights, i); | |
1176 | if (ret < 0) { | |
5fd18b37 | 1177 | dev_err(&connection->bundle->dev, |
2870b52b RMS |
1178 | "Fail to configure lights device\n"); |
1179 | goto out; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | out: | |
1184 | mutex_unlock(&glights->lights_lock); | |
1185 | return ret; | |
1186 | } | |
1187 | ||
6ce0eed7 VK |
1188 | static int gb_lights_register_all(struct gb_lights *glights) |
1189 | { | |
1190 | struct gb_connection *connection = glights->connection; | |
1191 | int ret = 0; | |
1192 | int i; | |
1193 | ||
1194 | mutex_lock(&glights->lights_lock); | |
1195 | for (i = 0; i < glights->lights_count; i++) { | |
1196 | ret = gb_lights_light_register(&glights->lights[i]); | |
1197 | if (ret < 0) { | |
1198 | dev_err(&connection->bundle->dev, | |
1199 | "Fail to enable lights device\n"); | |
1200 | break; | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | mutex_unlock(&glights->lights_lock); | |
1205 | return ret; | |
1206 | } | |
1207 | ||
69564dfe | 1208 | static int gb_lights_request_handler(struct gb_operation *op) |
2870b52b RMS |
1209 | { |
1210 | struct gb_connection *connection = op->connection; | |
5fd18b37 | 1211 | struct device *dev = &connection->bundle->dev; |
0ec30632 | 1212 | struct gb_lights *glights = gb_connection_get_data(connection); |
6ce0eed7 | 1213 | struct gb_light *light; |
2870b52b RMS |
1214 | struct gb_message *request; |
1215 | struct gb_lights_event_request *payload; | |
1216 | int ret = 0; | |
1217 | u8 light_id; | |
1218 | u8 event; | |
1219 | ||
69564dfe VK |
1220 | if (op->type != GB_LIGHTS_TYPE_EVENT) { |
1221 | dev_err(dev, "Unsupported unsolicited event: %u\n", op->type); | |
2870b52b RMS |
1222 | return -EINVAL; |
1223 | } | |
1224 | ||
1225 | request = op->request; | |
1226 | ||
1227 | if (request->payload_size < sizeof(*payload)) { | |
5fd18b37 | 1228 | dev_err(dev, "Wrong event size received (%zu < %zu)\n", |
2870b52b RMS |
1229 | request->payload_size, sizeof(*payload)); |
1230 | return -EINVAL; | |
1231 | } | |
1232 | ||
1233 | payload = request->payload; | |
1234 | light_id = payload->light_id; | |
1235 | ||
bf9deb29 | 1236 | if (light_id >= glights->lights_count || |
c6ad27a9 | 1237 | !glights->lights[light_id].ready) { |
5fd18b37 | 1238 | dev_err(dev, "Event received for unconfigured light id: %d\n", |
2870b52b RMS |
1239 | light_id); |
1240 | return -EINVAL; | |
1241 | } | |
1242 | ||
1243 | event = payload->event; | |
1244 | ||
1245 | if (event & GB_LIGHTS_LIGHT_CONFIG) { | |
6ce0eed7 VK |
1246 | light = &glights->lights[light_id]; |
1247 | ||
2870b52b | 1248 | mutex_lock(&glights->lights_lock); |
6ce0eed7 | 1249 | gb_lights_light_release(light); |
2870b52b | 1250 | ret = gb_lights_light_config(glights, light_id); |
6ce0eed7 VK |
1251 | if (!ret) |
1252 | ret = gb_lights_light_register(light); | |
2870b52b | 1253 | if (ret < 0) |
6ce0eed7 | 1254 | gb_lights_light_release(light); |
2870b52b RMS |
1255 | mutex_unlock(&glights->lights_lock); |
1256 | } | |
1257 | ||
1258 | return ret; | |
1259 | } | |
1260 | ||
69564dfe VK |
1261 | static int gb_lights_probe(struct gb_bundle *bundle, |
1262 | const struct greybus_bundle_id *id) | |
2870b52b | 1263 | { |
69564dfe VK |
1264 | struct greybus_descriptor_cport *cport_desc; |
1265 | struct gb_connection *connection; | |
2870b52b RMS |
1266 | struct gb_lights *glights; |
1267 | int ret; | |
1268 | ||
69564dfe VK |
1269 | if (bundle->num_cports != 1) |
1270 | return -ENODEV; | |
1271 | ||
1272 | cport_desc = &bundle->cport_desc[0]; | |
1273 | if (cport_desc->protocol_id != GREYBUS_PROTOCOL_LIGHTS) | |
1274 | return -ENODEV; | |
1275 | ||
2870b52b RMS |
1276 | glights = kzalloc(sizeof(*glights), GFP_KERNEL); |
1277 | if (!glights) | |
1278 | return -ENOMEM; | |
1279 | ||
957ccca0 VK |
1280 | mutex_init(&glights->lights_lock); |
1281 | ||
69564dfe VK |
1282 | connection = gb_connection_create(bundle, le16_to_cpu(cport_desc->id), |
1283 | gb_lights_request_handler); | |
1284 | if (IS_ERR(connection)) { | |
1285 | ret = PTR_ERR(connection); | |
1286 | goto out; | |
1287 | } | |
1288 | ||
2870b52b | 1289 | glights->connection = connection; |
0ec30632 | 1290 | gb_connection_set_data(connection, glights); |
2870b52b | 1291 | |
69564dfe VK |
1292 | greybus_set_drvdata(bundle, glights); |
1293 | ||
1294 | /* We aren't ready to receive an incoming request yet */ | |
1295 | ret = gb_connection_enable_tx(connection); | |
1296 | if (ret) | |
1297 | goto error_connection_destroy; | |
1298 | ||
2870b52b RMS |
1299 | /* |
1300 | * Setup all the lights devices over this connection, if anything goes | |
1301 | * wrong tear down all lights | |
1302 | */ | |
6ce0eed7 VK |
1303 | ret = gb_lights_create_all(glights); |
1304 | if (ret < 0) | |
69564dfe VK |
1305 | goto error_connection_disable; |
1306 | ||
1307 | /* We are ready to receive an incoming request now, enable RX as well */ | |
1308 | ret = gb_connection_enable(connection); | |
1309 | if (ret) | |
1310 | goto error_connection_disable; | |
6ce0eed7 VK |
1311 | |
1312 | /* Enable & register lights */ | |
1313 | ret = gb_lights_register_all(glights); | |
2870b52b | 1314 | if (ret < 0) |
69564dfe | 1315 | goto error_connection_disable; |
2870b52b | 1316 | |
9141ad87 KH |
1317 | gb_pm_runtime_put_autosuspend(bundle); |
1318 | ||
2870b52b RMS |
1319 | return 0; |
1320 | ||
69564dfe VK |
1321 | error_connection_disable: |
1322 | gb_connection_disable(connection); | |
1323 | error_connection_destroy: | |
1324 | gb_connection_destroy(connection); | |
2870b52b RMS |
1325 | out: |
1326 | gb_lights_release(glights); | |
1327 | return ret; | |
1328 | } | |
1329 | ||
69564dfe | 1330 | static void gb_lights_disconnect(struct gb_bundle *bundle) |
2870b52b | 1331 | { |
69564dfe VK |
1332 | struct gb_lights *glights = greybus_get_drvdata(bundle); |
1333 | ||
9141ad87 KH |
1334 | if (gb_pm_runtime_get_sync(bundle)) |
1335 | gb_pm_runtime_get_noresume(bundle); | |
1336 | ||
69564dfe VK |
1337 | gb_connection_disable(glights->connection); |
1338 | gb_connection_destroy(glights->connection); | |
2870b52b RMS |
1339 | |
1340 | gb_lights_release(glights); | |
1341 | } | |
1342 | ||
69564dfe VK |
1343 | static const struct greybus_bundle_id gb_lights_id_table[] = { |
1344 | { GREYBUS_DEVICE_CLASS(GREYBUS_CLASS_LIGHTS) }, | |
1345 | { } | |
2870b52b | 1346 | }; |
69564dfe | 1347 | MODULE_DEVICE_TABLE(greybus, gb_lights_id_table); |
2870b52b | 1348 | |
69564dfe VK |
1349 | static struct greybus_driver gb_lights_driver = { |
1350 | .name = "lights", | |
1351 | .probe = gb_lights_probe, | |
1352 | .disconnect = gb_lights_disconnect, | |
1353 | .id_table = gb_lights_id_table, | |
1354 | }; | |
1355 | module_greybus_driver(gb_lights_driver); | |
2870b52b RMS |
1356 | |
1357 | MODULE_LICENSE("GPL v2"); |