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0b56129b KK |
1 | /* |
2 | * leds-bd2802.c - RGB LED Driver | |
3 | * | |
4 | * Copyright (C) 2009 Samsung Electronics | |
5 | * Kim Kyuwon <q1.kim@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * Datasheet: http://www.rohm.com/products/databook/driver/pdf/bd2802gu-e.pdf | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/gpio.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/leds.h> | |
20 | #include <linux/leds-bd2802.h> | |
21 | ||
22 | ||
23 | #define LED_CTL(rgb2en, rgb1en) ((rgb2en) << 4 | ((rgb1en) << 0)) | |
24 | ||
25 | #define BD2802_LED_OFFSET 0xa | |
26 | #define BD2802_COLOR_OFFSET 0x3 | |
27 | ||
28 | #define BD2802_REG_CLKSETUP 0x00 | |
29 | #define BD2802_REG_CONTROL 0x01 | |
30 | #define BD2802_REG_HOURSETUP 0x02 | |
31 | #define BD2802_REG_CURRENT1SETUP 0x03 | |
32 | #define BD2802_REG_CURRENT2SETUP 0x04 | |
33 | #define BD2802_REG_WAVEPATTERN 0x05 | |
34 | ||
35 | #define BD2802_CURRENT_032 0x10 /* 3.2mA */ | |
36 | #define BD2802_CURRENT_000 0x00 /* 0.0mA */ | |
37 | ||
38 | #define BD2802_PATTERN_FULL 0x07 | |
39 | #define BD2802_PATTERN_HALF 0x03 | |
40 | ||
41 | enum led_ids { | |
42 | LED1, | |
43 | LED2, | |
44 | LED_NUM, | |
45 | }; | |
46 | ||
47 | enum led_colors { | |
48 | RED, | |
49 | GREEN, | |
50 | BLUE, | |
51 | }; | |
52 | ||
53 | enum led_bits { | |
54 | BD2802_OFF, | |
55 | BD2802_BLINK, | |
56 | BD2802_ON, | |
57 | }; | |
58 | ||
59 | /* | |
60 | * State '0' : 'off' | |
61 | * State '1' : 'blink' | |
62 | * State '2' : 'on'. | |
63 | */ | |
64 | struct led_state { | |
65 | unsigned r:2; | |
66 | unsigned g:2; | |
67 | unsigned b:2; | |
68 | }; | |
69 | ||
70 | struct bd2802_led { | |
71 | struct bd2802_led_platform_data *pdata; | |
72 | struct i2c_client *client; | |
73 | struct rw_semaphore rwsem; | |
74 | struct work_struct work; | |
75 | ||
76 | struct led_state led[2]; | |
77 | ||
78 | /* | |
79 | * Making led_classdev as array is not recommended, because array | |
80 | * members prevent using 'container_of' macro. So repetitive works | |
81 | * are needed. | |
82 | */ | |
83 | struct led_classdev cdev_led1r; | |
84 | struct led_classdev cdev_led1g; | |
85 | struct led_classdev cdev_led1b; | |
86 | struct led_classdev cdev_led2r; | |
87 | struct led_classdev cdev_led2g; | |
88 | struct led_classdev cdev_led2b; | |
89 | ||
90 | /* | |
91 | * Advanced Configuration Function(ADF) mode: | |
92 | * In ADF mode, user can set registers of BD2802GU directly, | |
93 | * therefore BD2802GU doesn't enter reset state. | |
94 | */ | |
95 | int adf_on; | |
96 | ||
97 | enum led_ids led_id; | |
98 | enum led_colors color; | |
99 | enum led_bits state; | |
8792f7cf KK |
100 | |
101 | /* General attributes of RGB LEDs */ | |
102 | int wave_pattern; | |
103 | int rgb_current; | |
0b56129b KK |
104 | }; |
105 | ||
106 | ||
107 | /*--------------------------------------------------------------*/ | |
108 | /* BD2802GU helper functions */ | |
109 | /*--------------------------------------------------------------*/ | |
110 | ||
111 | static inline int bd2802_is_rgb_off(struct bd2802_led *led, enum led_ids id, | |
112 | enum led_colors color) | |
113 | { | |
114 | switch (color) { | |
115 | case RED: | |
116 | return !led->led[id].r; | |
117 | case GREEN: | |
118 | return !led->led[id].g; | |
119 | case BLUE: | |
120 | return !led->led[id].b; | |
121 | default: | |
122 | dev_err(&led->client->dev, "%s: Invalid color\n", __func__); | |
123 | return -EINVAL; | |
124 | } | |
125 | } | |
126 | ||
127 | static inline int bd2802_is_led_off(struct bd2802_led *led, enum led_ids id) | |
128 | { | |
129 | if (led->led[id].r || led->led[id].g || led->led[id].b) | |
130 | return 0; | |
131 | ||
132 | return 1; | |
133 | } | |
134 | ||
135 | static inline int bd2802_is_all_off(struct bd2802_led *led) | |
136 | { | |
137 | int i; | |
138 | ||
139 | for (i = 0; i < LED_NUM; i++) | |
140 | if (!bd2802_is_led_off(led, i)) | |
141 | return 0; | |
142 | ||
143 | return 1; | |
144 | } | |
145 | ||
146 | static inline u8 bd2802_get_base_offset(enum led_ids id, enum led_colors color) | |
147 | { | |
148 | return id * BD2802_LED_OFFSET + color * BD2802_COLOR_OFFSET; | |
149 | } | |
150 | ||
151 | static inline u8 bd2802_get_reg_addr(enum led_ids id, enum led_colors color, | |
152 | u8 reg_offset) | |
153 | { | |
154 | return reg_offset + bd2802_get_base_offset(id, color); | |
155 | } | |
156 | ||
157 | ||
158 | /*--------------------------------------------------------------*/ | |
159 | /* BD2802GU core functions */ | |
160 | /*--------------------------------------------------------------*/ | |
161 | ||
162 | static int bd2802_write_byte(struct i2c_client *client, u8 reg, u8 val) | |
163 | { | |
164 | int ret = i2c_smbus_write_byte_data(client, reg, val); | |
165 | if (ret >= 0) | |
166 | return 0; | |
167 | ||
168 | dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", | |
169 | __func__, reg, val, ret); | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
174 | static void bd2802_update_state(struct bd2802_led *led, enum led_ids id, | |
175 | enum led_colors color, enum led_bits led_bit) | |
176 | { | |
177 | int i; | |
178 | u8 value; | |
179 | ||
180 | for (i = 0; i < LED_NUM; i++) { | |
181 | if (i == id) { | |
182 | switch (color) { | |
183 | case RED: | |
184 | led->led[i].r = led_bit; | |
185 | break; | |
186 | case GREEN: | |
187 | led->led[i].g = led_bit; | |
188 | break; | |
189 | case BLUE: | |
190 | led->led[i].b = led_bit; | |
191 | break; | |
192 | default: | |
193 | dev_err(&led->client->dev, | |
194 | "%s: Invalid color\n", __func__); | |
195 | return; | |
196 | } | |
197 | } | |
198 | } | |
199 | ||
200 | if (led_bit == BD2802_BLINK || led_bit == BD2802_ON) | |
201 | return; | |
202 | ||
203 | if (!bd2802_is_led_off(led, id)) | |
204 | return; | |
205 | ||
206 | if (bd2802_is_all_off(led) && !led->adf_on) { | |
207 | gpio_set_value(led->pdata->reset_gpio, 0); | |
208 | return; | |
209 | } | |
210 | ||
211 | /* | |
212 | * In this case, other led is turned on, and current led is turned | |
213 | * off. So set RGB LED Control register to stop the current RGB LED | |
214 | */ | |
215 | value = (id == LED1) ? LED_CTL(1, 0) : LED_CTL(0, 1); | |
216 | bd2802_write_byte(led->client, BD2802_REG_CONTROL, value); | |
217 | } | |
218 | ||
219 | static void bd2802_configure(struct bd2802_led *led) | |
220 | { | |
221 | struct bd2802_led_platform_data *pdata = led->pdata; | |
222 | u8 reg; | |
223 | ||
224 | reg = bd2802_get_reg_addr(LED1, RED, BD2802_REG_HOURSETUP); | |
225 | bd2802_write_byte(led->client, reg, pdata->rgb_time); | |
226 | ||
227 | reg = bd2802_get_reg_addr(LED2, RED, BD2802_REG_HOURSETUP); | |
228 | bd2802_write_byte(led->client, reg, pdata->rgb_time); | |
229 | } | |
230 | ||
231 | static void bd2802_reset_cancel(struct bd2802_led *led) | |
232 | { | |
233 | gpio_set_value(led->pdata->reset_gpio, 1); | |
234 | udelay(100); | |
235 | bd2802_configure(led); | |
236 | } | |
237 | ||
238 | static void bd2802_enable(struct bd2802_led *led, enum led_ids id) | |
239 | { | |
240 | enum led_ids other_led = (id == LED1) ? LED2 : LED1; | |
241 | u8 value, other_led_on; | |
242 | ||
243 | other_led_on = !bd2802_is_led_off(led, other_led); | |
244 | if (id == LED1) | |
245 | value = LED_CTL(other_led_on, 1); | |
246 | else | |
247 | value = LED_CTL(1 , other_led_on); | |
248 | ||
249 | bd2802_write_byte(led->client, BD2802_REG_CONTROL, value); | |
250 | } | |
251 | ||
252 | static void bd2802_set_on(struct bd2802_led *led, enum led_ids id, | |
253 | enum led_colors color) | |
254 | { | |
255 | u8 reg; | |
256 | ||
257 | if (bd2802_is_all_off(led) && !led->adf_on) | |
258 | bd2802_reset_cancel(led); | |
259 | ||
260 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); | |
8792f7cf | 261 | bd2802_write_byte(led->client, reg, led->rgb_current); |
0b56129b KK |
262 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); |
263 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); | |
264 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN); | |
265 | bd2802_write_byte(led->client, reg, BD2802_PATTERN_FULL); | |
266 | ||
267 | bd2802_enable(led, id); | |
268 | bd2802_update_state(led, id, color, BD2802_ON); | |
269 | } | |
270 | ||
271 | static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id, | |
272 | enum led_colors color) | |
273 | { | |
274 | u8 reg; | |
275 | ||
276 | if (bd2802_is_all_off(led) && !led->adf_on) | |
277 | bd2802_reset_cancel(led); | |
278 | ||
279 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); | |
280 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); | |
281 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); | |
8792f7cf | 282 | bd2802_write_byte(led->client, reg, led->rgb_current); |
0b56129b | 283 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN); |
8792f7cf | 284 | bd2802_write_byte(led->client, reg, led->wave_pattern); |
0b56129b KK |
285 | |
286 | bd2802_enable(led, id); | |
287 | bd2802_update_state(led, id, color, BD2802_BLINK); | |
288 | } | |
289 | ||
290 | static void bd2802_turn_on(struct bd2802_led *led, enum led_ids id, | |
291 | enum led_colors color, enum led_bits led_bit) | |
292 | { | |
293 | if (led_bit == BD2802_OFF) { | |
294 | dev_err(&led->client->dev, | |
295 | "Only 'blink' and 'on' are allowed\n"); | |
296 | return; | |
297 | } | |
298 | ||
299 | if (led_bit == BD2802_BLINK) | |
300 | bd2802_set_blink(led, id, color); | |
301 | else | |
302 | bd2802_set_on(led, id, color); | |
303 | } | |
304 | ||
305 | static void bd2802_turn_off(struct bd2802_led *led, enum led_ids id, | |
306 | enum led_colors color) | |
307 | { | |
308 | u8 reg; | |
309 | ||
310 | if (bd2802_is_rgb_off(led, id, color)) | |
311 | return; | |
312 | ||
313 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); | |
314 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); | |
315 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); | |
316 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); | |
317 | ||
318 | bd2802_update_state(led, id, color, BD2802_OFF); | |
319 | } | |
320 | ||
321 | static void bd2802_restore_state(struct bd2802_led *led) | |
322 | { | |
323 | int i; | |
324 | ||
325 | for (i = 0; i < LED_NUM; i++) { | |
326 | if (led->led[i].r) | |
327 | bd2802_turn_on(led, i, RED, led->led[i].r); | |
328 | if (led->led[i].g) | |
329 | bd2802_turn_on(led, i, GREEN, led->led[i].g); | |
330 | if (led->led[i].b) | |
331 | bd2802_turn_on(led, i, BLUE, led->led[i].b); | |
332 | } | |
333 | } | |
334 | ||
335 | #define BD2802_SET_REGISTER(reg_addr, reg_name) \ | |
336 | static ssize_t bd2802_store_reg##reg_addr(struct device *dev, \ | |
337 | struct device_attribute *attr, const char *buf, size_t count) \ | |
338 | { \ | |
339 | struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\ | |
340 | unsigned long val; \ | |
341 | int ret; \ | |
342 | if (!count) \ | |
343 | return -EINVAL; \ | |
344 | ret = strict_strtoul(buf, 16, &val); \ | |
345 | if (ret) \ | |
346 | return ret; \ | |
347 | down_write(&led->rwsem); \ | |
348 | bd2802_write_byte(led->client, reg_addr, (u8) val); \ | |
349 | up_write(&led->rwsem); \ | |
350 | return count; \ | |
351 | } \ | |
352 | static struct device_attribute bd2802_reg##reg_addr##_attr = { \ | |
353 | .attr = {.name = reg_name, .mode = 0644, .owner = THIS_MODULE}, \ | |
354 | .store = bd2802_store_reg##reg_addr, \ | |
355 | }; | |
356 | ||
357 | BD2802_SET_REGISTER(0x00, "0x00"); | |
358 | BD2802_SET_REGISTER(0x01, "0x01"); | |
359 | BD2802_SET_REGISTER(0x02, "0x02"); | |
360 | BD2802_SET_REGISTER(0x03, "0x03"); | |
361 | BD2802_SET_REGISTER(0x04, "0x04"); | |
362 | BD2802_SET_REGISTER(0x05, "0x05"); | |
363 | BD2802_SET_REGISTER(0x06, "0x06"); | |
364 | BD2802_SET_REGISTER(0x07, "0x07"); | |
365 | BD2802_SET_REGISTER(0x08, "0x08"); | |
366 | BD2802_SET_REGISTER(0x09, "0x09"); | |
367 | BD2802_SET_REGISTER(0x0a, "0x0a"); | |
368 | BD2802_SET_REGISTER(0x0b, "0x0b"); | |
369 | BD2802_SET_REGISTER(0x0c, "0x0c"); | |
370 | BD2802_SET_REGISTER(0x0d, "0x0d"); | |
371 | BD2802_SET_REGISTER(0x0e, "0x0e"); | |
372 | BD2802_SET_REGISTER(0x0f, "0x0f"); | |
373 | BD2802_SET_REGISTER(0x10, "0x10"); | |
374 | BD2802_SET_REGISTER(0x11, "0x11"); | |
375 | BD2802_SET_REGISTER(0x12, "0x12"); | |
376 | BD2802_SET_REGISTER(0x13, "0x13"); | |
377 | BD2802_SET_REGISTER(0x14, "0x14"); | |
378 | BD2802_SET_REGISTER(0x15, "0x15"); | |
379 | ||
380 | static struct device_attribute *bd2802_addr_attributes[] = { | |
381 | &bd2802_reg0x00_attr, | |
382 | &bd2802_reg0x01_attr, | |
383 | &bd2802_reg0x02_attr, | |
384 | &bd2802_reg0x03_attr, | |
385 | &bd2802_reg0x04_attr, | |
386 | &bd2802_reg0x05_attr, | |
387 | &bd2802_reg0x06_attr, | |
388 | &bd2802_reg0x07_attr, | |
389 | &bd2802_reg0x08_attr, | |
390 | &bd2802_reg0x09_attr, | |
391 | &bd2802_reg0x0a_attr, | |
392 | &bd2802_reg0x0b_attr, | |
393 | &bd2802_reg0x0c_attr, | |
394 | &bd2802_reg0x0d_attr, | |
395 | &bd2802_reg0x0e_attr, | |
396 | &bd2802_reg0x0f_attr, | |
397 | &bd2802_reg0x10_attr, | |
398 | &bd2802_reg0x11_attr, | |
399 | &bd2802_reg0x12_attr, | |
400 | &bd2802_reg0x13_attr, | |
401 | &bd2802_reg0x14_attr, | |
402 | &bd2802_reg0x15_attr, | |
403 | }; | |
404 | ||
405 | static void bd2802_enable_adv_conf(struct bd2802_led *led) | |
406 | { | |
407 | int i, ret; | |
408 | ||
409 | for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) { | |
410 | ret = device_create_file(&led->client->dev, | |
411 | bd2802_addr_attributes[i]); | |
412 | if (ret) { | |
8792f7cf | 413 | dev_err(&led->client->dev, "failed: sysfs file %s\n", |
0b56129b KK |
414 | bd2802_addr_attributes[i]->attr.name); |
415 | goto failed_remove_files; | |
416 | } | |
417 | } | |
418 | ||
419 | if (bd2802_is_all_off(led)) | |
420 | bd2802_reset_cancel(led); | |
421 | ||
422 | led->adf_on = 1; | |
423 | ||
424 | return; | |
425 | ||
426 | failed_remove_files: | |
427 | for (i--; i >= 0; i--) | |
428 | device_remove_file(&led->client->dev, | |
429 | bd2802_addr_attributes[i]); | |
430 | } | |
431 | ||
432 | static void bd2802_disable_adv_conf(struct bd2802_led *led) | |
433 | { | |
434 | int i; | |
435 | ||
436 | for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) | |
437 | device_remove_file(&led->client->dev, | |
438 | bd2802_addr_attributes[i]); | |
439 | ||
440 | if (bd2802_is_all_off(led)) | |
441 | gpio_set_value(led->pdata->reset_gpio, 0); | |
442 | ||
443 | led->adf_on = 0; | |
444 | } | |
445 | ||
446 | static ssize_t bd2802_show_adv_conf(struct device *dev, | |
447 | struct device_attribute *attr, char *buf) | |
448 | { | |
449 | struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
450 | ssize_t ret; | |
451 | ||
452 | down_read(&led->rwsem); | |
453 | if (led->adf_on) | |
454 | ret = sprintf(buf, "on\n"); | |
455 | else | |
456 | ret = sprintf(buf, "off\n"); | |
457 | up_read(&led->rwsem); | |
458 | ||
459 | return ret; | |
460 | } | |
461 | ||
462 | static ssize_t bd2802_store_adv_conf(struct device *dev, | |
463 | struct device_attribute *attr, const char *buf, size_t count) | |
464 | { | |
465 | struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
466 | ||
467 | if (!count) | |
468 | return -EINVAL; | |
469 | ||
470 | down_write(&led->rwsem); | |
471 | if (!led->adf_on && !strncmp(buf, "on", 2)) | |
472 | bd2802_enable_adv_conf(led); | |
473 | else if (led->adf_on && !strncmp(buf, "off", 3)) | |
474 | bd2802_disable_adv_conf(led); | |
475 | up_write(&led->rwsem); | |
476 | ||
477 | return count; | |
478 | } | |
479 | ||
480 | static struct device_attribute bd2802_adv_conf_attr = { | |
481 | .attr = { | |
482 | .name = "advanced_configuration", | |
483 | .mode = 0644, | |
484 | .owner = THIS_MODULE | |
485 | }, | |
486 | .show = bd2802_show_adv_conf, | |
487 | .store = bd2802_store_adv_conf, | |
488 | }; | |
489 | ||
8792f7cf KK |
490 | #define BD2802_CONTROL_ATTR(attr_name, name_str) \ |
491 | static ssize_t bd2802_show_##attr_name(struct device *dev, \ | |
492 | struct device_attribute *attr, char *buf) \ | |
493 | { \ | |
494 | struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\ | |
495 | ssize_t ret; \ | |
496 | down_read(&led->rwsem); \ | |
497 | ret = sprintf(buf, "0x%02x\n", led->attr_name); \ | |
498 | up_read(&led->rwsem); \ | |
499 | return ret; \ | |
500 | } \ | |
501 | static ssize_t bd2802_store_##attr_name(struct device *dev, \ | |
502 | struct device_attribute *attr, const char *buf, size_t count) \ | |
503 | { \ | |
504 | struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\ | |
505 | unsigned long val; \ | |
506 | int ret; \ | |
507 | if (!count) \ | |
508 | return -EINVAL; \ | |
509 | ret = strict_strtoul(buf, 16, &val); \ | |
510 | if (ret) \ | |
511 | return ret; \ | |
512 | down_write(&led->rwsem); \ | |
513 | led->attr_name = val; \ | |
514 | up_write(&led->rwsem); \ | |
515 | return count; \ | |
516 | } \ | |
517 | static struct device_attribute bd2802_##attr_name##_attr = { \ | |
518 | .attr = { \ | |
519 | .name = name_str, \ | |
520 | .mode = 0644, \ | |
521 | .owner = THIS_MODULE \ | |
522 | }, \ | |
523 | .show = bd2802_show_##attr_name, \ | |
524 | .store = bd2802_store_##attr_name, \ | |
525 | }; | |
526 | ||
527 | BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern"); | |
528 | BD2802_CONTROL_ATTR(rgb_current, "rgb_current"); | |
529 | ||
530 | static struct device_attribute *bd2802_attributes[] = { | |
531 | &bd2802_adv_conf_attr, | |
532 | &bd2802_wave_pattern_attr, | |
533 | &bd2802_rgb_current_attr, | |
534 | }; | |
535 | ||
0b56129b KK |
536 | static void bd2802_led_work(struct work_struct *work) |
537 | { | |
538 | struct bd2802_led *led = container_of(work, struct bd2802_led, work); | |
539 | ||
540 | if (led->state) | |
541 | bd2802_turn_on(led, led->led_id, led->color, led->state); | |
542 | else | |
543 | bd2802_turn_off(led, led->led_id, led->color); | |
544 | } | |
545 | ||
546 | #define BD2802_CONTROL_RGBS(name, id, clr) \ | |
547 | static void bd2802_set_##name##_brightness(struct led_classdev *led_cdev,\ | |
548 | enum led_brightness value) \ | |
549 | { \ | |
550 | struct bd2802_led *led = \ | |
551 | container_of(led_cdev, struct bd2802_led, cdev_##name); \ | |
552 | led->led_id = id; \ | |
553 | led->color = clr; \ | |
554 | if (value == LED_OFF) \ | |
555 | led->state = BD2802_OFF; \ | |
556 | else \ | |
557 | led->state = BD2802_ON; \ | |
558 | schedule_work(&led->work); \ | |
559 | } \ | |
560 | static int bd2802_set_##name##_blink(struct led_classdev *led_cdev, \ | |
561 | unsigned long *delay_on, unsigned long *delay_off) \ | |
562 | { \ | |
563 | struct bd2802_led *led = \ | |
564 | container_of(led_cdev, struct bd2802_led, cdev_##name); \ | |
565 | if (*delay_on == 0 || *delay_off == 0) \ | |
566 | return -EINVAL; \ | |
567 | led->led_id = id; \ | |
568 | led->color = clr; \ | |
569 | led->state = BD2802_BLINK; \ | |
570 | schedule_work(&led->work); \ | |
571 | return 0; \ | |
572 | } | |
573 | ||
574 | BD2802_CONTROL_RGBS(led1r, LED1, RED); | |
575 | BD2802_CONTROL_RGBS(led1g, LED1, GREEN); | |
576 | BD2802_CONTROL_RGBS(led1b, LED1, BLUE); | |
577 | BD2802_CONTROL_RGBS(led2r, LED2, RED); | |
578 | BD2802_CONTROL_RGBS(led2g, LED2, GREEN); | |
579 | BD2802_CONTROL_RGBS(led2b, LED2, BLUE); | |
580 | ||
581 | static int bd2802_register_led_classdev(struct bd2802_led *led) | |
582 | { | |
583 | int ret; | |
584 | ||
585 | INIT_WORK(&led->work, bd2802_led_work); | |
586 | ||
587 | led->cdev_led1r.name = "led1_R"; | |
588 | led->cdev_led1r.brightness = LED_OFF; | |
589 | led->cdev_led1r.brightness_set = bd2802_set_led1r_brightness; | |
590 | led->cdev_led1r.blink_set = bd2802_set_led1r_blink; | |
0b56129b KK |
591 | |
592 | ret = led_classdev_register(&led->client->dev, &led->cdev_led1r); | |
593 | if (ret < 0) { | |
594 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
595 | led->cdev_led1r.name); | |
596 | goto failed_unregister_led1_R; | |
597 | } | |
598 | ||
599 | led->cdev_led1g.name = "led1_G"; | |
600 | led->cdev_led1g.brightness = LED_OFF; | |
601 | led->cdev_led1g.brightness_set = bd2802_set_led1g_brightness; | |
602 | led->cdev_led1g.blink_set = bd2802_set_led1g_blink; | |
0b56129b KK |
603 | |
604 | ret = led_classdev_register(&led->client->dev, &led->cdev_led1g); | |
605 | if (ret < 0) { | |
606 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
607 | led->cdev_led1g.name); | |
608 | goto failed_unregister_led1_G; | |
609 | } | |
610 | ||
611 | led->cdev_led1b.name = "led1_B"; | |
612 | led->cdev_led1b.brightness = LED_OFF; | |
613 | led->cdev_led1b.brightness_set = bd2802_set_led1b_brightness; | |
614 | led->cdev_led1b.blink_set = bd2802_set_led1b_blink; | |
0b56129b KK |
615 | |
616 | ret = led_classdev_register(&led->client->dev, &led->cdev_led1b); | |
617 | if (ret < 0) { | |
618 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
619 | led->cdev_led1b.name); | |
620 | goto failed_unregister_led1_B; | |
621 | } | |
622 | ||
623 | led->cdev_led2r.name = "led2_R"; | |
624 | led->cdev_led2r.brightness = LED_OFF; | |
625 | led->cdev_led2r.brightness_set = bd2802_set_led2r_brightness; | |
626 | led->cdev_led2r.blink_set = bd2802_set_led2r_blink; | |
0b56129b KK |
627 | |
628 | ret = led_classdev_register(&led->client->dev, &led->cdev_led2r); | |
629 | if (ret < 0) { | |
630 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
631 | led->cdev_led2r.name); | |
632 | goto failed_unregister_led2_R; | |
633 | } | |
634 | ||
635 | led->cdev_led2g.name = "led2_G"; | |
636 | led->cdev_led2g.brightness = LED_OFF; | |
637 | led->cdev_led2g.brightness_set = bd2802_set_led2g_brightness; | |
638 | led->cdev_led2g.blink_set = bd2802_set_led2g_blink; | |
0b56129b KK |
639 | |
640 | ret = led_classdev_register(&led->client->dev, &led->cdev_led2g); | |
641 | if (ret < 0) { | |
642 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
643 | led->cdev_led2g.name); | |
644 | goto failed_unregister_led2_G; | |
645 | } | |
646 | ||
647 | led->cdev_led2b.name = "led2_B"; | |
648 | led->cdev_led2b.brightness = LED_OFF; | |
649 | led->cdev_led2b.brightness_set = bd2802_set_led2b_brightness; | |
650 | led->cdev_led2b.blink_set = bd2802_set_led2b_blink; | |
651 | led->cdev_led2b.flags |= LED_CORE_SUSPENDRESUME; | |
652 | ||
653 | ret = led_classdev_register(&led->client->dev, &led->cdev_led2b); | |
654 | if (ret < 0) { | |
655 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
656 | led->cdev_led2b.name); | |
657 | goto failed_unregister_led2_B; | |
658 | } | |
659 | ||
660 | return 0; | |
661 | ||
662 | failed_unregister_led2_B: | |
663 | led_classdev_unregister(&led->cdev_led2g); | |
664 | failed_unregister_led2_G: | |
665 | led_classdev_unregister(&led->cdev_led2r); | |
666 | failed_unregister_led2_R: | |
667 | led_classdev_unregister(&led->cdev_led1b); | |
668 | failed_unregister_led1_B: | |
669 | led_classdev_unregister(&led->cdev_led1g); | |
670 | failed_unregister_led1_G: | |
671 | led_classdev_unregister(&led->cdev_led1r); | |
672 | failed_unregister_led1_R: | |
673 | ||
674 | return ret; | |
675 | } | |
676 | ||
677 | static void bd2802_unregister_led_classdev(struct bd2802_led *led) | |
678 | { | |
679 | cancel_work_sync(&led->work); | |
680 | led_classdev_unregister(&led->cdev_led1r); | |
681 | } | |
682 | ||
683 | static int __devinit bd2802_probe(struct i2c_client *client, | |
684 | const struct i2c_device_id *id) | |
685 | { | |
686 | struct bd2802_led *led; | |
687 | struct bd2802_led_platform_data *pdata; | |
8792f7cf | 688 | int ret, i; |
0b56129b KK |
689 | |
690 | led = kzalloc(sizeof(struct bd2802_led), GFP_KERNEL); | |
691 | if (!led) { | |
692 | dev_err(&client->dev, "failed to allocate driver data\n"); | |
693 | return -ENOMEM; | |
694 | } | |
695 | ||
696 | led->client = client; | |
697 | pdata = led->pdata = client->dev.platform_data; | |
698 | i2c_set_clientdata(client, led); | |
699 | ||
700 | /* Configure RESET GPIO (L: RESET, H: RESET cancel) */ | |
701 | gpio_request(pdata->reset_gpio, "RGB_RESETB"); | |
702 | gpio_direction_output(pdata->reset_gpio, 1); | |
703 | ||
704 | /* Tacss = min 0.1ms */ | |
705 | udelay(100); | |
706 | ||
707 | /* Detect BD2802GU */ | |
708 | ret = bd2802_write_byte(client, BD2802_REG_CLKSETUP, 0x00); | |
709 | if (ret < 0) { | |
710 | dev_err(&client->dev, "failed to detect device\n"); | |
711 | goto failed_free; | |
712 | } else | |
713 | dev_info(&client->dev, "return 0x%02x\n", ret); | |
714 | ||
715 | /* To save the power, reset BD2802 after detecting */ | |
716 | gpio_set_value(led->pdata->reset_gpio, 0); | |
717 | ||
8792f7cf KK |
718 | /* Default attributes */ |
719 | led->wave_pattern = BD2802_PATTERN_HALF; | |
720 | led->rgb_current = BD2802_CURRENT_032; | |
721 | ||
0b56129b KK |
722 | init_rwsem(&led->rwsem); |
723 | ||
8792f7cf KK |
724 | for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) { |
725 | ret = device_create_file(&led->client->dev, | |
726 | bd2802_attributes[i]); | |
727 | if (ret) { | |
728 | dev_err(&led->client->dev, "failed: sysfs file %s\n", | |
729 | bd2802_attributes[i]->attr.name); | |
730 | goto failed_unregister_dev_file; | |
731 | } | |
0b56129b KK |
732 | } |
733 | ||
734 | ret = bd2802_register_led_classdev(led); | |
735 | if (ret < 0) | |
736 | goto failed_unregister_dev_file; | |
737 | ||
738 | return 0; | |
739 | ||
740 | failed_unregister_dev_file: | |
8792f7cf KK |
741 | for (i--; i >= 0; i--) |
742 | device_remove_file(&led->client->dev, bd2802_attributes[i]); | |
0b56129b KK |
743 | failed_free: |
744 | i2c_set_clientdata(client, NULL); | |
745 | kfree(led); | |
746 | ||
747 | return ret; | |
748 | } | |
749 | ||
750 | static int __exit bd2802_remove(struct i2c_client *client) | |
751 | { | |
752 | struct bd2802_led *led = i2c_get_clientdata(client); | |
8792f7cf | 753 | int i; |
0b56129b | 754 | |
0b56129b | 755 | gpio_set_value(led->pdata->reset_gpio, 0); |
8792f7cf | 756 | bd2802_unregister_led_classdev(led); |
0b56129b KK |
757 | if (led->adf_on) |
758 | bd2802_disable_adv_conf(led); | |
8792f7cf KK |
759 | for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) |
760 | device_remove_file(&led->client->dev, bd2802_attributes[i]); | |
0b56129b KK |
761 | i2c_set_clientdata(client, NULL); |
762 | kfree(led); | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
767 | static int bd2802_suspend(struct i2c_client *client, pm_message_t mesg) | |
768 | { | |
769 | struct bd2802_led *led = i2c_get_clientdata(client); | |
770 | ||
771 | gpio_set_value(led->pdata->reset_gpio, 0); | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
776 | static int bd2802_resume(struct i2c_client *client) | |
777 | { | |
778 | struct bd2802_led *led = i2c_get_clientdata(client); | |
779 | ||
780 | if (!bd2802_is_all_off(led) || led->adf_on) { | |
b8389018 | 781 | bd2802_reset_cancel(led); |
0b56129b KK |
782 | bd2802_restore_state(led); |
783 | } | |
784 | ||
785 | return 0; | |
786 | } | |
787 | ||
788 | static const struct i2c_device_id bd2802_id[] = { | |
789 | { "BD2802", 0 }, | |
790 | { } | |
791 | }; | |
792 | MODULE_DEVICE_TABLE(i2c, bd2802_id); | |
793 | ||
794 | static struct i2c_driver bd2802_i2c_driver = { | |
795 | .driver = { | |
796 | .name = "BD2802", | |
797 | }, | |
798 | .probe = bd2802_probe, | |
799 | .remove = __exit_p(bd2802_remove), | |
800 | .suspend = bd2802_suspend, | |
801 | .resume = bd2802_resume, | |
802 | .id_table = bd2802_id, | |
803 | }; | |
804 | ||
805 | static int __init bd2802_init(void) | |
806 | { | |
807 | return i2c_add_driver(&bd2802_i2c_driver); | |
808 | } | |
809 | module_init(bd2802_init); | |
810 | ||
811 | static void __exit bd2802_exit(void) | |
812 | { | |
813 | i2c_del_driver(&bd2802_i2c_driver); | |
814 | } | |
815 | module_exit(bd2802_exit); | |
816 | ||
817 | MODULE_AUTHOR("Kim Kyuwon <q1.kim@samsung.com>"); | |
818 | MODULE_DESCRIPTION("BD2802 LED driver"); | |
1b18cf41 | 819 | MODULE_LICENSE("GPL v2"); |