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74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
b54cf35a JSM |
2 | /* |
3 | * leds-blinkm.c | |
4 | * (c) Jan-Simon Möller (dl9pf@gmx.de) | |
b54cf35a JSM |
5 | */ |
6 | ||
7 | #include <linux/module.h> | |
b54cf35a JSM |
8 | #include <linux/slab.h> |
9 | #include <linux/jiffies.h> | |
10 | #include <linux/i2c.h> | |
11 | #include <linux/err.h> | |
12 | #include <linux/mutex.h> | |
13 | #include <linux/sysfs.h> | |
14 | #include <linux/printk.h> | |
15 | #include <linux/pm_runtime.h> | |
16 | #include <linux/leds.h> | |
17 | #include <linux/delay.h> | |
18 | ||
19 | /* Addresses to scan - BlinkM is on 0x09 by default*/ | |
20 | static const unsigned short normal_i2c[] = { 0x09, I2C_CLIENT_END }; | |
21 | ||
22 | static int blinkm_transfer_hw(struct i2c_client *client, int cmd); | |
23 | static int blinkm_test_run(struct i2c_client *client); | |
24 | ||
25 | struct blinkm_led { | |
26 | struct i2c_client *i2c_client; | |
27 | struct led_classdev led_cdev; | |
28 | int id; | |
b54cf35a JSM |
29 | }; |
30 | ||
31 | #define cdev_to_blmled(c) container_of(c, struct blinkm_led, led_cdev) | |
b54cf35a JSM |
32 | |
33 | struct blinkm_data { | |
34 | struct i2c_client *i2c_client; | |
35 | struct mutex update_lock; | |
36 | /* used for led class interface */ | |
37 | struct blinkm_led blinkm_leds[3]; | |
38 | /* used for "blinkm" sysfs interface */ | |
39 | u8 red; /* color red */ | |
40 | u8 green; /* color green */ | |
41 | u8 blue; /* color blue */ | |
42 | /* next values to use for transfer */ | |
43 | u8 next_red; /* color red */ | |
44 | u8 next_green; /* color green */ | |
45 | u8 next_blue; /* color blue */ | |
46 | /* internal use */ | |
47 | u8 args[7]; /* set of args for transmission */ | |
48 | u8 i2c_addr; /* i2c addr */ | |
49 | u8 fw_ver; /* firmware version */ | |
50 | /* used, but not from userspace */ | |
51 | u8 hue; /* HSB hue */ | |
52 | u8 saturation; /* HSB saturation */ | |
53 | u8 brightness; /* HSB brightness */ | |
54 | u8 next_hue; /* HSB hue */ | |
55 | u8 next_saturation; /* HSB saturation */ | |
56 | u8 next_brightness; /* HSB brightness */ | |
57 | /* currently unused / todo */ | |
58 | u8 fade_speed; /* fade speed 1 - 255 */ | |
59 | s8 time_adjust; /* time adjust -128 - 127 */ | |
60 | u8 fade:1; /* fade on = 1, off = 0 */ | |
61 | u8 rand:1; /* rand fade mode on = 1 */ | |
62 | u8 script_id; /* script ID */ | |
63 | u8 script_repeats; /* repeats of script */ | |
64 | u8 script_startline; /* line to start */ | |
65 | }; | |
66 | ||
67 | /* Colors */ | |
68 | #define RED 0 | |
69 | #define GREEN 1 | |
70 | #define BLUE 2 | |
71 | ||
72 | /* mapping command names to cmd chars - see datasheet */ | |
73 | #define BLM_GO_RGB 0 | |
74 | #define BLM_FADE_RGB 1 | |
75 | #define BLM_FADE_HSB 2 | |
76 | #define BLM_FADE_RAND_RGB 3 | |
77 | #define BLM_FADE_RAND_HSB 4 | |
78 | #define BLM_PLAY_SCRIPT 5 | |
79 | #define BLM_STOP_SCRIPT 6 | |
80 | #define BLM_SET_FADE_SPEED 7 | |
81 | #define BLM_SET_TIME_ADJ 8 | |
82 | #define BLM_GET_CUR_RGB 9 | |
83 | #define BLM_WRITE_SCRIPT_LINE 10 | |
84 | #define BLM_READ_SCRIPT_LINE 11 | |
85 | #define BLM_SET_SCRIPT_LR 12 /* Length & Repeats */ | |
86 | #define BLM_SET_ADDR 13 | |
87 | #define BLM_GET_ADDR 14 | |
88 | #define BLM_GET_FW_VER 15 | |
89 | #define BLM_SET_STARTUP_PARAM 16 | |
90 | ||
91 | /* BlinkM Commands | |
92 | * as extracted out of the datasheet: | |
93 | * | |
94 | * cmdchar = command (ascii) | |
95 | * cmdbyte = command in hex | |
96 | * nr_args = number of arguments (to send) | |
97 | * nr_ret = number of return values (to read) | |
98 | * dir = direction (0 = read, 1 = write, 2 = both) | |
99 | * | |
100 | */ | |
101 | static const struct { | |
102 | char cmdchar; | |
103 | u8 cmdbyte; | |
104 | u8 nr_args; | |
105 | u8 nr_ret; | |
106 | u8 dir:2; | |
107 | } blinkm_cmds[17] = { | |
108 | /* cmdchar, cmdbyte, nr_args, nr_ret, dir */ | |
109 | { 'n', 0x6e, 3, 0, 1}, | |
110 | { 'c', 0x63, 3, 0, 1}, | |
111 | { 'h', 0x68, 3, 0, 1}, | |
112 | { 'C', 0x43, 3, 0, 1}, | |
113 | { 'H', 0x48, 3, 0, 1}, | |
114 | { 'p', 0x70, 3, 0, 1}, | |
115 | { 'o', 0x6f, 0, 0, 1}, | |
116 | { 'f', 0x66, 1, 0, 1}, | |
117 | { 't', 0x74, 1, 0, 1}, | |
118 | { 'g', 0x67, 0, 3, 0}, | |
119 | { 'W', 0x57, 7, 0, 1}, | |
120 | { 'R', 0x52, 2, 5, 2}, | |
121 | { 'L', 0x4c, 3, 0, 1}, | |
122 | { 'A', 0x41, 4, 0, 1}, | |
123 | { 'a', 0x61, 0, 1, 0}, | |
124 | { 'Z', 0x5a, 0, 1, 0}, | |
125 | { 'B', 0x42, 5, 0, 1}, | |
126 | }; | |
127 | ||
128 | static ssize_t show_color_common(struct device *dev, char *buf, int color) | |
129 | { | |
130 | struct i2c_client *client; | |
131 | struct blinkm_data *data; | |
132 | int ret; | |
133 | ||
134 | client = to_i2c_client(dev); | |
135 | data = i2c_get_clientdata(client); | |
136 | ||
137 | ret = blinkm_transfer_hw(client, BLM_GET_CUR_RGB); | |
138 | if (ret < 0) | |
139 | return ret; | |
140 | switch (color) { | |
141 | case RED: | |
142 | return scnprintf(buf, PAGE_SIZE, "%02X\n", data->red); | |
b54cf35a JSM |
143 | case GREEN: |
144 | return scnprintf(buf, PAGE_SIZE, "%02X\n", data->green); | |
b54cf35a JSM |
145 | case BLUE: |
146 | return scnprintf(buf, PAGE_SIZE, "%02X\n", data->blue); | |
b54cf35a JSM |
147 | default: |
148 | return -EINVAL; | |
149 | } | |
150 | return -EINVAL; | |
151 | } | |
152 | ||
153 | static int store_color_common(struct device *dev, const char *buf, int color) | |
154 | { | |
155 | struct i2c_client *client; | |
156 | struct blinkm_data *data; | |
157 | int ret; | |
158 | u8 value; | |
159 | ||
160 | client = to_i2c_client(dev); | |
161 | data = i2c_get_clientdata(client); | |
162 | ||
163 | ret = kstrtou8(buf, 10, &value); | |
164 | if (ret < 0) { | |
165 | dev_err(dev, "BlinkM: value too large!\n"); | |
166 | return ret; | |
167 | } | |
168 | ||
169 | switch (color) { | |
170 | case RED: | |
171 | data->next_red = value; | |
172 | break; | |
173 | case GREEN: | |
174 | data->next_green = value; | |
175 | break; | |
176 | case BLUE: | |
177 | data->next_blue = value; | |
178 | break; | |
179 | default: | |
180 | return -EINVAL; | |
181 | } | |
182 | ||
183 | dev_dbg(dev, "next_red = %d, next_green = %d, next_blue = %d\n", | |
184 | data->next_red, data->next_green, data->next_blue); | |
185 | ||
186 | /* if mode ... */ | |
187 | ret = blinkm_transfer_hw(client, BLM_GO_RGB); | |
188 | if (ret < 0) { | |
189 | dev_err(dev, "BlinkM: can't set RGB\n"); | |
190 | return ret; | |
191 | } | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static ssize_t show_red(struct device *dev, struct device_attribute *attr, | |
196 | char *buf) | |
197 | { | |
198 | return show_color_common(dev, buf, RED); | |
199 | } | |
200 | ||
201 | static ssize_t store_red(struct device *dev, struct device_attribute *attr, | |
202 | const char *buf, size_t count) | |
203 | { | |
204 | int ret; | |
205 | ||
206 | ret = store_color_common(dev, buf, RED); | |
207 | if (ret < 0) | |
208 | return ret; | |
209 | return count; | |
210 | } | |
211 | ||
212 | static DEVICE_ATTR(red, S_IRUGO | S_IWUSR, show_red, store_red); | |
213 | ||
214 | static ssize_t show_green(struct device *dev, struct device_attribute *attr, | |
215 | char *buf) | |
216 | { | |
217 | return show_color_common(dev, buf, GREEN); | |
218 | } | |
219 | ||
220 | static ssize_t store_green(struct device *dev, struct device_attribute *attr, | |
221 | const char *buf, size_t count) | |
222 | { | |
223 | ||
224 | int ret; | |
225 | ||
226 | ret = store_color_common(dev, buf, GREEN); | |
227 | if (ret < 0) | |
228 | return ret; | |
229 | return count; | |
230 | } | |
231 | ||
232 | static DEVICE_ATTR(green, S_IRUGO | S_IWUSR, show_green, store_green); | |
233 | ||
234 | static ssize_t show_blue(struct device *dev, struct device_attribute *attr, | |
235 | char *buf) | |
236 | { | |
237 | return show_color_common(dev, buf, BLUE); | |
238 | } | |
239 | ||
240 | static ssize_t store_blue(struct device *dev, struct device_attribute *attr, | |
241 | const char *buf, size_t count) | |
242 | { | |
243 | int ret; | |
244 | ||
245 | ret = store_color_common(dev, buf, BLUE); | |
246 | if (ret < 0) | |
247 | return ret; | |
248 | return count; | |
249 | } | |
250 | ||
251 | static DEVICE_ATTR(blue, S_IRUGO | S_IWUSR, show_blue, store_blue); | |
252 | ||
253 | static ssize_t show_test(struct device *dev, struct device_attribute *attr, | |
254 | char *buf) | |
255 | { | |
256 | return scnprintf(buf, PAGE_SIZE, | |
257 | "#Write into test to start test sequence!#\n"); | |
258 | } | |
259 | ||
260 | static ssize_t store_test(struct device *dev, struct device_attribute *attr, | |
261 | const char *buf, size_t count) | |
262 | { | |
263 | ||
264 | struct i2c_client *client; | |
265 | int ret; | |
266 | client = to_i2c_client(dev); | |
267 | ||
268 | /*test */ | |
269 | ret = blinkm_test_run(client); | |
270 | if (ret < 0) | |
271 | return ret; | |
272 | ||
273 | return count; | |
274 | } | |
275 | ||
276 | static DEVICE_ATTR(test, S_IRUGO | S_IWUSR, show_test, store_test); | |
277 | ||
278 | /* TODO: HSB, fade, timeadj, script ... */ | |
279 | ||
280 | static struct attribute *blinkm_attrs[] = { | |
281 | &dev_attr_red.attr, | |
282 | &dev_attr_green.attr, | |
283 | &dev_attr_blue.attr, | |
284 | &dev_attr_test.attr, | |
285 | NULL, | |
286 | }; | |
287 | ||
7358df4d | 288 | static const struct attribute_group blinkm_group = { |
b54cf35a JSM |
289 | .name = "blinkm", |
290 | .attrs = blinkm_attrs, | |
291 | }; | |
292 | ||
293 | static int blinkm_write(struct i2c_client *client, int cmd, u8 *arg) | |
294 | { | |
295 | int result; | |
296 | int i; | |
297 | int arglen = blinkm_cmds[cmd].nr_args; | |
298 | /* write out cmd to blinkm - always / default step */ | |
299 | result = i2c_smbus_write_byte(client, blinkm_cmds[cmd].cmdbyte); | |
300 | if (result < 0) | |
301 | return result; | |
302 | /* no args to write out */ | |
303 | if (arglen == 0) | |
304 | return 0; | |
305 | ||
306 | for (i = 0; i < arglen; i++) { | |
307 | /* repeat for arglen */ | |
308 | result = i2c_smbus_write_byte(client, arg[i]); | |
309 | if (result < 0) | |
310 | return result; | |
311 | } | |
312 | return 0; | |
313 | } | |
314 | ||
315 | static int blinkm_read(struct i2c_client *client, int cmd, u8 *arg) | |
316 | { | |
317 | int result; | |
318 | int i; | |
319 | int retlen = blinkm_cmds[cmd].nr_ret; | |
320 | for (i = 0; i < retlen; i++) { | |
321 | /* repeat for retlen */ | |
322 | result = i2c_smbus_read_byte(client); | |
323 | if (result < 0) | |
324 | return result; | |
325 | arg[i] = result; | |
326 | } | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
331 | static int blinkm_transfer_hw(struct i2c_client *client, int cmd) | |
332 | { | |
333 | /* the protocol is simple but non-standard: | |
334 | * e.g. cmd 'g' (= 0x67) for "get device address" | |
335 | * - which defaults to 0x09 - would be the sequence: | |
336 | * a) write 0x67 to the device (byte write) | |
337 | * b) read the value (0x09) back right after (byte read) | |
338 | * | |
339 | * Watch out for "unfinished" sequences (i.e. not enough reads | |
340 | * or writes after a command. It will make the blinkM misbehave. | |
341 | * Sequence is key here. | |
342 | */ | |
343 | ||
344 | /* args / return are in private data struct */ | |
345 | struct blinkm_data *data = i2c_get_clientdata(client); | |
346 | ||
347 | /* We start hardware transfers which are not to be | |
348 | * mixed with other commands. Aquire a lock now. */ | |
349 | if (mutex_lock_interruptible(&data->update_lock) < 0) | |
350 | return -EAGAIN; | |
351 | ||
352 | /* switch cmd - usually write before reads */ | |
353 | switch (cmd) { | |
354 | case BLM_FADE_RAND_RGB: | |
355 | case BLM_GO_RGB: | |
356 | case BLM_FADE_RGB: | |
357 | data->args[0] = data->next_red; | |
358 | data->args[1] = data->next_green; | |
359 | data->args[2] = data->next_blue; | |
360 | blinkm_write(client, cmd, data->args); | |
361 | data->red = data->args[0]; | |
362 | data->green = data->args[1]; | |
363 | data->blue = data->args[2]; | |
364 | break; | |
365 | case BLM_FADE_HSB: | |
366 | case BLM_FADE_RAND_HSB: | |
367 | data->args[0] = data->next_hue; | |
368 | data->args[1] = data->next_saturation; | |
369 | data->args[2] = data->next_brightness; | |
370 | blinkm_write(client, cmd, data->args); | |
371 | data->hue = data->next_hue; | |
372 | data->saturation = data->next_saturation; | |
373 | data->brightness = data->next_brightness; | |
374 | break; | |
375 | case BLM_PLAY_SCRIPT: | |
376 | data->args[0] = data->script_id; | |
377 | data->args[1] = data->script_repeats; | |
378 | data->args[2] = data->script_startline; | |
379 | blinkm_write(client, cmd, data->args); | |
380 | break; | |
381 | case BLM_STOP_SCRIPT: | |
382 | blinkm_write(client, cmd, NULL); | |
383 | break; | |
384 | case BLM_GET_CUR_RGB: | |
385 | data->args[0] = data->red; | |
386 | data->args[1] = data->green; | |
387 | data->args[2] = data->blue; | |
388 | blinkm_write(client, cmd, NULL); | |
389 | blinkm_read(client, cmd, data->args); | |
390 | data->red = data->args[0]; | |
391 | data->green = data->args[1]; | |
392 | data->blue = data->args[2]; | |
393 | break; | |
394 | case BLM_GET_ADDR: | |
395 | data->args[0] = data->i2c_addr; | |
396 | blinkm_write(client, cmd, NULL); | |
397 | blinkm_read(client, cmd, data->args); | |
398 | data->i2c_addr = data->args[0]; | |
399 | break; | |
400 | case BLM_SET_TIME_ADJ: | |
401 | case BLM_SET_FADE_SPEED: | |
402 | case BLM_READ_SCRIPT_LINE: | |
403 | case BLM_WRITE_SCRIPT_LINE: | |
404 | case BLM_SET_SCRIPT_LR: | |
405 | case BLM_SET_ADDR: | |
406 | case BLM_GET_FW_VER: | |
407 | case BLM_SET_STARTUP_PARAM: | |
408 | dev_err(&client->dev, | |
409 | "BlinkM: cmd %d not implemented yet.\n", cmd); | |
410 | break; | |
411 | default: | |
412 | dev_err(&client->dev, "BlinkM: unknown command %d\n", cmd); | |
413 | mutex_unlock(&data->update_lock); | |
414 | return -EINVAL; | |
415 | } /* end switch(cmd) */ | |
416 | ||
417 | /* transfers done, unlock */ | |
418 | mutex_unlock(&data->update_lock); | |
419 | return 0; | |
420 | } | |
421 | ||
b54cf35a JSM |
422 | static int blinkm_led_common_set(struct led_classdev *led_cdev, |
423 | enum led_brightness value, int color) | |
424 | { | |
425 | /* led_brightness is 0, 127 or 255 - we just use it here as-is */ | |
426 | struct blinkm_led *led = cdev_to_blmled(led_cdev); | |
427 | struct blinkm_data *data = i2c_get_clientdata(led->i2c_client); | |
b54cf35a JSM |
428 | |
429 | switch (color) { | |
430 | case RED: | |
431 | /* bail out if there's no change */ | |
432 | if (data->next_red == (u8) value) | |
433 | return 0; | |
b54cf35a JSM |
434 | data->next_red = (u8) value; |
435 | break; | |
436 | case GREEN: | |
437 | /* bail out if there's no change */ | |
438 | if (data->next_green == (u8) value) | |
439 | return 0; | |
b54cf35a JSM |
440 | data->next_green = (u8) value; |
441 | break; | |
442 | case BLUE: | |
443 | /* bail out if there's no change */ | |
444 | if (data->next_blue == (u8) value) | |
445 | return 0; | |
b54cf35a JSM |
446 | data->next_blue = (u8) value; |
447 | break; | |
448 | ||
449 | default: | |
450 | dev_err(&led->i2c_client->dev, "BlinkM: unknown color.\n"); | |
451 | return -EINVAL; | |
452 | } | |
453 | ||
7e1761b0 | 454 | blinkm_transfer_hw(led->i2c_client, BLM_GO_RGB); |
b54cf35a | 455 | dev_dbg(&led->i2c_client->dev, |
7e1761b0 AL |
456 | "# DONE # next_red = %d, next_green = %d," |
457 | " next_blue = %d\n", | |
b54cf35a | 458 | data->next_red, data->next_green, |
7e1761b0 | 459 | data->next_blue); |
b54cf35a JSM |
460 | return 0; |
461 | } | |
462 | ||
7e1761b0 | 463 | static int blinkm_led_red_set(struct led_classdev *led_cdev, |
b54cf35a JSM |
464 | enum led_brightness value) |
465 | { | |
7e1761b0 | 466 | return blinkm_led_common_set(led_cdev, value, RED); |
b54cf35a JSM |
467 | } |
468 | ||
7e1761b0 | 469 | static int blinkm_led_green_set(struct led_classdev *led_cdev, |
b54cf35a JSM |
470 | enum led_brightness value) |
471 | { | |
7e1761b0 | 472 | return blinkm_led_common_set(led_cdev, value, GREEN); |
b54cf35a JSM |
473 | } |
474 | ||
7e1761b0 | 475 | static int blinkm_led_blue_set(struct led_classdev *led_cdev, |
b54cf35a JSM |
476 | enum led_brightness value) |
477 | { | |
7e1761b0 | 478 | return blinkm_led_common_set(led_cdev, value, BLUE); |
b54cf35a JSM |
479 | } |
480 | ||
481 | static void blinkm_init_hw(struct i2c_client *client) | |
482 | { | |
483 | int ret; | |
484 | ret = blinkm_transfer_hw(client, BLM_STOP_SCRIPT); | |
485 | ret = blinkm_transfer_hw(client, BLM_GO_RGB); | |
486 | } | |
487 | ||
488 | static int blinkm_test_run(struct i2c_client *client) | |
489 | { | |
490 | int ret; | |
491 | struct blinkm_data *data = i2c_get_clientdata(client); | |
492 | ||
493 | data->next_red = 0x01; | |
494 | data->next_green = 0x05; | |
495 | data->next_blue = 0x10; | |
496 | ret = blinkm_transfer_hw(client, BLM_GO_RGB); | |
497 | if (ret < 0) | |
498 | return ret; | |
499 | msleep(2000); | |
500 | ||
501 | data->next_red = 0x25; | |
502 | data->next_green = 0x10; | |
503 | data->next_blue = 0x31; | |
504 | ret = blinkm_transfer_hw(client, BLM_FADE_RGB); | |
505 | if (ret < 0) | |
506 | return ret; | |
507 | msleep(2000); | |
508 | ||
509 | data->next_hue = 0x50; | |
510 | data->next_saturation = 0x10; | |
511 | data->next_brightness = 0x20; | |
512 | ret = blinkm_transfer_hw(client, BLM_FADE_HSB); | |
513 | if (ret < 0) | |
514 | return ret; | |
515 | msleep(2000); | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | /* Return 0 if detection is successful, -ENODEV otherwise */ | |
521 | static int blinkm_detect(struct i2c_client *client, struct i2c_board_info *info) | |
522 | { | |
523 | struct i2c_adapter *adapter = client->adapter; | |
524 | int ret; | |
525 | int count = 99; | |
526 | u8 tmpargs[7]; | |
527 | ||
528 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | |
529 | | I2C_FUNC_SMBUS_WORD_DATA | |
530 | | I2C_FUNC_SMBUS_WRITE_BYTE)) | |
531 | return -ENODEV; | |
532 | ||
533 | /* Now, we do the remaining detection. Simple for now. */ | |
534 | /* We might need more guards to protect other i2c slaves */ | |
535 | ||
536 | /* make sure the blinkM is balanced (read/writes) */ | |
537 | while (count > 0) { | |
538 | ret = blinkm_write(client, BLM_GET_ADDR, NULL); | |
e0d42298 AB |
539 | if (ret) |
540 | return ret; | |
b54cf35a JSM |
541 | usleep_range(5000, 10000); |
542 | ret = blinkm_read(client, BLM_GET_ADDR, tmpargs); | |
e0d42298 AB |
543 | if (ret) |
544 | return ret; | |
b54cf35a JSM |
545 | usleep_range(5000, 10000); |
546 | if (tmpargs[0] == 0x09) | |
547 | count = 0; | |
548 | count--; | |
549 | } | |
550 | ||
551 | /* Step 1: Read BlinkM address back - cmd_char 'a' */ | |
552 | ret = blinkm_write(client, BLM_GET_ADDR, NULL); | |
553 | if (ret < 0) | |
18d4a06f | 554 | return ret; |
b54cf35a JSM |
555 | usleep_range(20000, 30000); /* allow a small delay */ |
556 | ret = blinkm_read(client, BLM_GET_ADDR, tmpargs); | |
557 | if (ret < 0) | |
18d4a06f | 558 | return ret; |
b54cf35a JSM |
559 | |
560 | if (tmpargs[0] != 0x09) { | |
561 | dev_err(&client->dev, "enodev DEV ADDR = 0x%02X\n", tmpargs[0]); | |
562 | return -ENODEV; | |
563 | } | |
564 | ||
565 | strlcpy(info->type, "blinkm", I2C_NAME_SIZE); | |
566 | return 0; | |
567 | } | |
568 | ||
98ea1ea2 | 569 | static int blinkm_probe(struct i2c_client *client, |
b54cf35a JSM |
570 | const struct i2c_device_id *id) |
571 | { | |
572 | struct blinkm_data *data; | |
573 | struct blinkm_led *led[3]; | |
574 | int err, i; | |
575 | char blinkm_led_name[28]; | |
576 | ||
577 | data = devm_kzalloc(&client->dev, | |
578 | sizeof(struct blinkm_data), GFP_KERNEL); | |
579 | if (!data) { | |
580 | err = -ENOMEM; | |
581 | goto exit; | |
582 | } | |
583 | ||
b54cf35a JSM |
584 | data->i2c_addr = 0x08; |
585 | /* i2c addr - use fake addr of 0x08 initially (real is 0x09) */ | |
586 | data->fw_ver = 0xfe; | |
587 | /* firmware version - use fake until we read real value | |
588 | * (currently broken - BlinkM confused!) */ | |
589 | data->script_id = 0x01; | |
590 | data->i2c_client = client; | |
591 | ||
592 | i2c_set_clientdata(client, data); | |
593 | mutex_init(&data->update_lock); | |
594 | ||
595 | /* Register sysfs hooks */ | |
596 | err = sysfs_create_group(&client->dev.kobj, &blinkm_group); | |
597 | if (err < 0) { | |
598 | dev_err(&client->dev, "couldn't register sysfs group\n"); | |
599 | goto exit; | |
600 | } | |
601 | ||
602 | for (i = 0; i < 3; i++) { | |
603 | /* RED = 0, GREEN = 1, BLUE = 2 */ | |
604 | led[i] = &data->blinkm_leds[i]; | |
605 | led[i]->i2c_client = client; | |
606 | led[i]->id = i; | |
607 | led[i]->led_cdev.max_brightness = 255; | |
608 | led[i]->led_cdev.flags = LED_CORE_SUSPENDRESUME; | |
b54cf35a JSM |
609 | switch (i) { |
610 | case RED: | |
611 | snprintf(blinkm_led_name, sizeof(blinkm_led_name), | |
612 | "blinkm-%d-%d-red", | |
613 | client->adapter->nr, | |
614 | client->addr); | |
615 | led[i]->led_cdev.name = blinkm_led_name; | |
7e1761b0 AL |
616 | led[i]->led_cdev.brightness_set_blocking = |
617 | blinkm_led_red_set; | |
b54cf35a JSM |
618 | err = led_classdev_register(&client->dev, |
619 | &led[i]->led_cdev); | |
620 | if (err < 0) { | |
621 | dev_err(&client->dev, | |
622 | "couldn't register LED %s\n", | |
623 | led[i]->led_cdev.name); | |
624 | goto failred; | |
625 | } | |
626 | break; | |
627 | case GREEN: | |
628 | snprintf(blinkm_led_name, sizeof(blinkm_led_name), | |
629 | "blinkm-%d-%d-green", | |
630 | client->adapter->nr, | |
631 | client->addr); | |
632 | led[i]->led_cdev.name = blinkm_led_name; | |
7e1761b0 AL |
633 | led[i]->led_cdev.brightness_set_blocking = |
634 | blinkm_led_green_set; | |
b54cf35a JSM |
635 | err = led_classdev_register(&client->dev, |
636 | &led[i]->led_cdev); | |
637 | if (err < 0) { | |
638 | dev_err(&client->dev, | |
639 | "couldn't register LED %s\n", | |
640 | led[i]->led_cdev.name); | |
641 | goto failgreen; | |
642 | } | |
643 | break; | |
644 | case BLUE: | |
645 | snprintf(blinkm_led_name, sizeof(blinkm_led_name), | |
646 | "blinkm-%d-%d-blue", | |
647 | client->adapter->nr, | |
648 | client->addr); | |
649 | led[i]->led_cdev.name = blinkm_led_name; | |
7e1761b0 AL |
650 | led[i]->led_cdev.brightness_set_blocking = |
651 | blinkm_led_blue_set; | |
b54cf35a JSM |
652 | err = led_classdev_register(&client->dev, |
653 | &led[i]->led_cdev); | |
654 | if (err < 0) { | |
655 | dev_err(&client->dev, | |
656 | "couldn't register LED %s\n", | |
657 | led[i]->led_cdev.name); | |
658 | goto failblue; | |
659 | } | |
660 | break; | |
661 | } /* end switch */ | |
662 | } /* end for */ | |
663 | ||
664 | /* Initialize the blinkm */ | |
665 | blinkm_init_hw(client); | |
666 | ||
667 | return 0; | |
668 | ||
669 | failblue: | |
670 | led_classdev_unregister(&led[GREEN]->led_cdev); | |
671 | ||
672 | failgreen: | |
673 | led_classdev_unregister(&led[RED]->led_cdev); | |
674 | ||
675 | failred: | |
676 | sysfs_remove_group(&client->dev.kobj, &blinkm_group); | |
677 | exit: | |
678 | return err; | |
679 | } | |
680 | ||
678e8a6b | 681 | static int blinkm_remove(struct i2c_client *client) |
b54cf35a JSM |
682 | { |
683 | struct blinkm_data *data = i2c_get_clientdata(client); | |
684 | int ret = 0; | |
685 | int i; | |
686 | ||
687 | /* make sure no workqueue entries are pending */ | |
7e1761b0 | 688 | for (i = 0; i < 3; i++) |
b54cf35a | 689 | led_classdev_unregister(&data->blinkm_leds[i].led_cdev); |
b54cf35a JSM |
690 | |
691 | /* reset rgb */ | |
692 | data->next_red = 0x00; | |
693 | data->next_green = 0x00; | |
694 | data->next_blue = 0x00; | |
695 | ret = blinkm_transfer_hw(client, BLM_FADE_RGB); | |
696 | if (ret < 0) | |
697 | dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n"); | |
698 | ||
699 | /* reset hsb */ | |
700 | data->next_hue = 0x00; | |
701 | data->next_saturation = 0x00; | |
702 | data->next_brightness = 0x00; | |
703 | ret = blinkm_transfer_hw(client, BLM_FADE_HSB); | |
704 | if (ret < 0) | |
705 | dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n"); | |
706 | ||
707 | /* red fade to off */ | |
708 | data->next_red = 0xff; | |
709 | ret = blinkm_transfer_hw(client, BLM_GO_RGB); | |
710 | if (ret < 0) | |
711 | dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n"); | |
712 | ||
713 | /* off */ | |
714 | data->next_red = 0x00; | |
715 | ret = blinkm_transfer_hw(client, BLM_FADE_RGB); | |
716 | if (ret < 0) | |
717 | dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n"); | |
718 | ||
719 | sysfs_remove_group(&client->dev.kobj, &blinkm_group); | |
720 | return 0; | |
721 | } | |
722 | ||
723 | static const struct i2c_device_id blinkm_id[] = { | |
724 | {"blinkm", 0}, | |
725 | {} | |
726 | }; | |
727 | ||
728 | MODULE_DEVICE_TABLE(i2c, blinkm_id); | |
729 | ||
730 | /* This is the driver that will be inserted */ | |
731 | static struct i2c_driver blinkm_driver = { | |
732 | .class = I2C_CLASS_HWMON, | |
733 | .driver = { | |
734 | .name = "blinkm", | |
735 | }, | |
736 | .probe = blinkm_probe, | |
df07cf81 | 737 | .remove = blinkm_remove, |
b54cf35a JSM |
738 | .id_table = blinkm_id, |
739 | .detect = blinkm_detect, | |
740 | .address_list = normal_i2c, | |
741 | }; | |
742 | ||
743 | module_i2c_driver(blinkm_driver); | |
744 | ||
745 | MODULE_AUTHOR("Jan-Simon Moeller <dl9pf@gmx.de>"); | |
746 | MODULE_DESCRIPTION("BlinkM RGB LED driver"); | |
747 | MODULE_LICENSE("GPL"); | |
748 |