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b54cf35a JSM |
1 | /* |
2 | * leds-blinkm.c | |
3 | * (c) Jan-Simon Möller (dl9pf@gmx.de) | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
b54cf35a JSM |
21 | #include <linux/slab.h> |
22 | #include <linux/jiffies.h> | |
23 | #include <linux/i2c.h> | |
24 | #include <linux/err.h> | |
25 | #include <linux/mutex.h> | |
26 | #include <linux/sysfs.h> | |
27 | #include <linux/printk.h> | |
28 | #include <linux/pm_runtime.h> | |
29 | #include <linux/leds.h> | |
30 | #include <linux/delay.h> | |
31 | ||
32 | /* Addresses to scan - BlinkM is on 0x09 by default*/ | |
33 | static const unsigned short normal_i2c[] = { 0x09, I2C_CLIENT_END }; | |
34 | ||
35 | static int blinkm_transfer_hw(struct i2c_client *client, int cmd); | |
36 | static int blinkm_test_run(struct i2c_client *client); | |
37 | ||
38 | struct blinkm_led { | |
39 | struct i2c_client *i2c_client; | |
40 | struct led_classdev led_cdev; | |
41 | int id; | |
b54cf35a JSM |
42 | }; |
43 | ||
44 | #define cdev_to_blmled(c) container_of(c, struct blinkm_led, led_cdev) | |
b54cf35a JSM |
45 | |
46 | struct blinkm_data { | |
47 | struct i2c_client *i2c_client; | |
48 | struct mutex update_lock; | |
49 | /* used for led class interface */ | |
50 | struct blinkm_led blinkm_leds[3]; | |
51 | /* used for "blinkm" sysfs interface */ | |
52 | u8 red; /* color red */ | |
53 | u8 green; /* color green */ | |
54 | u8 blue; /* color blue */ | |
55 | /* next values to use for transfer */ | |
56 | u8 next_red; /* color red */ | |
57 | u8 next_green; /* color green */ | |
58 | u8 next_blue; /* color blue */ | |
59 | /* internal use */ | |
60 | u8 args[7]; /* set of args for transmission */ | |
61 | u8 i2c_addr; /* i2c addr */ | |
62 | u8 fw_ver; /* firmware version */ | |
63 | /* used, but not from userspace */ | |
64 | u8 hue; /* HSB hue */ | |
65 | u8 saturation; /* HSB saturation */ | |
66 | u8 brightness; /* HSB brightness */ | |
67 | u8 next_hue; /* HSB hue */ | |
68 | u8 next_saturation; /* HSB saturation */ | |
69 | u8 next_brightness; /* HSB brightness */ | |
70 | /* currently unused / todo */ | |
71 | u8 fade_speed; /* fade speed 1 - 255 */ | |
72 | s8 time_adjust; /* time adjust -128 - 127 */ | |
73 | u8 fade:1; /* fade on = 1, off = 0 */ | |
74 | u8 rand:1; /* rand fade mode on = 1 */ | |
75 | u8 script_id; /* script ID */ | |
76 | u8 script_repeats; /* repeats of script */ | |
77 | u8 script_startline; /* line to start */ | |
78 | }; | |
79 | ||
80 | /* Colors */ | |
81 | #define RED 0 | |
82 | #define GREEN 1 | |
83 | #define BLUE 2 | |
84 | ||
85 | /* mapping command names to cmd chars - see datasheet */ | |
86 | #define BLM_GO_RGB 0 | |
87 | #define BLM_FADE_RGB 1 | |
88 | #define BLM_FADE_HSB 2 | |
89 | #define BLM_FADE_RAND_RGB 3 | |
90 | #define BLM_FADE_RAND_HSB 4 | |
91 | #define BLM_PLAY_SCRIPT 5 | |
92 | #define BLM_STOP_SCRIPT 6 | |
93 | #define BLM_SET_FADE_SPEED 7 | |
94 | #define BLM_SET_TIME_ADJ 8 | |
95 | #define BLM_GET_CUR_RGB 9 | |
96 | #define BLM_WRITE_SCRIPT_LINE 10 | |
97 | #define BLM_READ_SCRIPT_LINE 11 | |
98 | #define BLM_SET_SCRIPT_LR 12 /* Length & Repeats */ | |
99 | #define BLM_SET_ADDR 13 | |
100 | #define BLM_GET_ADDR 14 | |
101 | #define BLM_GET_FW_VER 15 | |
102 | #define BLM_SET_STARTUP_PARAM 16 | |
103 | ||
104 | /* BlinkM Commands | |
105 | * as extracted out of the datasheet: | |
106 | * | |
107 | * cmdchar = command (ascii) | |
108 | * cmdbyte = command in hex | |
109 | * nr_args = number of arguments (to send) | |
110 | * nr_ret = number of return values (to read) | |
111 | * dir = direction (0 = read, 1 = write, 2 = both) | |
112 | * | |
113 | */ | |
114 | static const struct { | |
115 | char cmdchar; | |
116 | u8 cmdbyte; | |
117 | u8 nr_args; | |
118 | u8 nr_ret; | |
119 | u8 dir:2; | |
120 | } blinkm_cmds[17] = { | |
121 | /* cmdchar, cmdbyte, nr_args, nr_ret, dir */ | |
122 | { 'n', 0x6e, 3, 0, 1}, | |
123 | { 'c', 0x63, 3, 0, 1}, | |
124 | { 'h', 0x68, 3, 0, 1}, | |
125 | { 'C', 0x43, 3, 0, 1}, | |
126 | { 'H', 0x48, 3, 0, 1}, | |
127 | { 'p', 0x70, 3, 0, 1}, | |
128 | { 'o', 0x6f, 0, 0, 1}, | |
129 | { 'f', 0x66, 1, 0, 1}, | |
130 | { 't', 0x74, 1, 0, 1}, | |
131 | { 'g', 0x67, 0, 3, 0}, | |
132 | { 'W', 0x57, 7, 0, 1}, | |
133 | { 'R', 0x52, 2, 5, 2}, | |
134 | { 'L', 0x4c, 3, 0, 1}, | |
135 | { 'A', 0x41, 4, 0, 1}, | |
136 | { 'a', 0x61, 0, 1, 0}, | |
137 | { 'Z', 0x5a, 0, 1, 0}, | |
138 | { 'B', 0x42, 5, 0, 1}, | |
139 | }; | |
140 | ||
141 | static ssize_t show_color_common(struct device *dev, char *buf, int color) | |
142 | { | |
143 | struct i2c_client *client; | |
144 | struct blinkm_data *data; | |
145 | int ret; | |
146 | ||
147 | client = to_i2c_client(dev); | |
148 | data = i2c_get_clientdata(client); | |
149 | ||
150 | ret = blinkm_transfer_hw(client, BLM_GET_CUR_RGB); | |
151 | if (ret < 0) | |
152 | return ret; | |
153 | switch (color) { | |
154 | case RED: | |
155 | return scnprintf(buf, PAGE_SIZE, "%02X\n", data->red); | |
b54cf35a JSM |
156 | case GREEN: |
157 | return scnprintf(buf, PAGE_SIZE, "%02X\n", data->green); | |
b54cf35a JSM |
158 | case BLUE: |
159 | return scnprintf(buf, PAGE_SIZE, "%02X\n", data->blue); | |
b54cf35a JSM |
160 | default: |
161 | return -EINVAL; | |
162 | } | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
166 | static int store_color_common(struct device *dev, const char *buf, int color) | |
167 | { | |
168 | struct i2c_client *client; | |
169 | struct blinkm_data *data; | |
170 | int ret; | |
171 | u8 value; | |
172 | ||
173 | client = to_i2c_client(dev); | |
174 | data = i2c_get_clientdata(client); | |
175 | ||
176 | ret = kstrtou8(buf, 10, &value); | |
177 | if (ret < 0) { | |
178 | dev_err(dev, "BlinkM: value too large!\n"); | |
179 | return ret; | |
180 | } | |
181 | ||
182 | switch (color) { | |
183 | case RED: | |
184 | data->next_red = value; | |
185 | break; | |
186 | case GREEN: | |
187 | data->next_green = value; | |
188 | break; | |
189 | case BLUE: | |
190 | data->next_blue = value; | |
191 | break; | |
192 | default: | |
193 | return -EINVAL; | |
194 | } | |
195 | ||
196 | dev_dbg(dev, "next_red = %d, next_green = %d, next_blue = %d\n", | |
197 | data->next_red, data->next_green, data->next_blue); | |
198 | ||
199 | /* if mode ... */ | |
200 | ret = blinkm_transfer_hw(client, BLM_GO_RGB); | |
201 | if (ret < 0) { | |
202 | dev_err(dev, "BlinkM: can't set RGB\n"); | |
203 | return ret; | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
208 | static ssize_t show_red(struct device *dev, struct device_attribute *attr, | |
209 | char *buf) | |
210 | { | |
211 | return show_color_common(dev, buf, RED); | |
212 | } | |
213 | ||
214 | static ssize_t store_red(struct device *dev, struct device_attribute *attr, | |
215 | const char *buf, size_t count) | |
216 | { | |
217 | int ret; | |
218 | ||
219 | ret = store_color_common(dev, buf, RED); | |
220 | if (ret < 0) | |
221 | return ret; | |
222 | return count; | |
223 | } | |
224 | ||
225 | static DEVICE_ATTR(red, S_IRUGO | S_IWUSR, show_red, store_red); | |
226 | ||
227 | static ssize_t show_green(struct device *dev, struct device_attribute *attr, | |
228 | char *buf) | |
229 | { | |
230 | return show_color_common(dev, buf, GREEN); | |
231 | } | |
232 | ||
233 | static ssize_t store_green(struct device *dev, struct device_attribute *attr, | |
234 | const char *buf, size_t count) | |
235 | { | |
236 | ||
237 | int ret; | |
238 | ||
239 | ret = store_color_common(dev, buf, GREEN); | |
240 | if (ret < 0) | |
241 | return ret; | |
242 | return count; | |
243 | } | |
244 | ||
245 | static DEVICE_ATTR(green, S_IRUGO | S_IWUSR, show_green, store_green); | |
246 | ||
247 | static ssize_t show_blue(struct device *dev, struct device_attribute *attr, | |
248 | char *buf) | |
249 | { | |
250 | return show_color_common(dev, buf, BLUE); | |
251 | } | |
252 | ||
253 | static ssize_t store_blue(struct device *dev, struct device_attribute *attr, | |
254 | const char *buf, size_t count) | |
255 | { | |
256 | int ret; | |
257 | ||
258 | ret = store_color_common(dev, buf, BLUE); | |
259 | if (ret < 0) | |
260 | return ret; | |
261 | return count; | |
262 | } | |
263 | ||
264 | static DEVICE_ATTR(blue, S_IRUGO | S_IWUSR, show_blue, store_blue); | |
265 | ||
266 | static ssize_t show_test(struct device *dev, struct device_attribute *attr, | |
267 | char *buf) | |
268 | { | |
269 | return scnprintf(buf, PAGE_SIZE, | |
270 | "#Write into test to start test sequence!#\n"); | |
271 | } | |
272 | ||
273 | static ssize_t store_test(struct device *dev, struct device_attribute *attr, | |
274 | const char *buf, size_t count) | |
275 | { | |
276 | ||
277 | struct i2c_client *client; | |
278 | int ret; | |
279 | client = to_i2c_client(dev); | |
280 | ||
281 | /*test */ | |
282 | ret = blinkm_test_run(client); | |
283 | if (ret < 0) | |
284 | return ret; | |
285 | ||
286 | return count; | |
287 | } | |
288 | ||
289 | static DEVICE_ATTR(test, S_IRUGO | S_IWUSR, show_test, store_test); | |
290 | ||
291 | /* TODO: HSB, fade, timeadj, script ... */ | |
292 | ||
293 | static struct attribute *blinkm_attrs[] = { | |
294 | &dev_attr_red.attr, | |
295 | &dev_attr_green.attr, | |
296 | &dev_attr_blue.attr, | |
297 | &dev_attr_test.attr, | |
298 | NULL, | |
299 | }; | |
300 | ||
7358df4d | 301 | static const struct attribute_group blinkm_group = { |
b54cf35a JSM |
302 | .name = "blinkm", |
303 | .attrs = blinkm_attrs, | |
304 | }; | |
305 | ||
306 | static int blinkm_write(struct i2c_client *client, int cmd, u8 *arg) | |
307 | { | |
308 | int result; | |
309 | int i; | |
310 | int arglen = blinkm_cmds[cmd].nr_args; | |
311 | /* write out cmd to blinkm - always / default step */ | |
312 | result = i2c_smbus_write_byte(client, blinkm_cmds[cmd].cmdbyte); | |
313 | if (result < 0) | |
314 | return result; | |
315 | /* no args to write out */ | |
316 | if (arglen == 0) | |
317 | return 0; | |
318 | ||
319 | for (i = 0; i < arglen; i++) { | |
320 | /* repeat for arglen */ | |
321 | result = i2c_smbus_write_byte(client, arg[i]); | |
322 | if (result < 0) | |
323 | return result; | |
324 | } | |
325 | return 0; | |
326 | } | |
327 | ||
328 | static int blinkm_read(struct i2c_client *client, int cmd, u8 *arg) | |
329 | { | |
330 | int result; | |
331 | int i; | |
332 | int retlen = blinkm_cmds[cmd].nr_ret; | |
333 | for (i = 0; i < retlen; i++) { | |
334 | /* repeat for retlen */ | |
335 | result = i2c_smbus_read_byte(client); | |
336 | if (result < 0) | |
337 | return result; | |
338 | arg[i] = result; | |
339 | } | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
344 | static int blinkm_transfer_hw(struct i2c_client *client, int cmd) | |
345 | { | |
346 | /* the protocol is simple but non-standard: | |
347 | * e.g. cmd 'g' (= 0x67) for "get device address" | |
348 | * - which defaults to 0x09 - would be the sequence: | |
349 | * a) write 0x67 to the device (byte write) | |
350 | * b) read the value (0x09) back right after (byte read) | |
351 | * | |
352 | * Watch out for "unfinished" sequences (i.e. not enough reads | |
353 | * or writes after a command. It will make the blinkM misbehave. | |
354 | * Sequence is key here. | |
355 | */ | |
356 | ||
357 | /* args / return are in private data struct */ | |
358 | struct blinkm_data *data = i2c_get_clientdata(client); | |
359 | ||
360 | /* We start hardware transfers which are not to be | |
361 | * mixed with other commands. Aquire a lock now. */ | |
362 | if (mutex_lock_interruptible(&data->update_lock) < 0) | |
363 | return -EAGAIN; | |
364 | ||
365 | /* switch cmd - usually write before reads */ | |
366 | switch (cmd) { | |
367 | case BLM_FADE_RAND_RGB: | |
368 | case BLM_GO_RGB: | |
369 | case BLM_FADE_RGB: | |
370 | data->args[0] = data->next_red; | |
371 | data->args[1] = data->next_green; | |
372 | data->args[2] = data->next_blue; | |
373 | blinkm_write(client, cmd, data->args); | |
374 | data->red = data->args[0]; | |
375 | data->green = data->args[1]; | |
376 | data->blue = data->args[2]; | |
377 | break; | |
378 | case BLM_FADE_HSB: | |
379 | case BLM_FADE_RAND_HSB: | |
380 | data->args[0] = data->next_hue; | |
381 | data->args[1] = data->next_saturation; | |
382 | data->args[2] = data->next_brightness; | |
383 | blinkm_write(client, cmd, data->args); | |
384 | data->hue = data->next_hue; | |
385 | data->saturation = data->next_saturation; | |
386 | data->brightness = data->next_brightness; | |
387 | break; | |
388 | case BLM_PLAY_SCRIPT: | |
389 | data->args[0] = data->script_id; | |
390 | data->args[1] = data->script_repeats; | |
391 | data->args[2] = data->script_startline; | |
392 | blinkm_write(client, cmd, data->args); | |
393 | break; | |
394 | case BLM_STOP_SCRIPT: | |
395 | blinkm_write(client, cmd, NULL); | |
396 | break; | |
397 | case BLM_GET_CUR_RGB: | |
398 | data->args[0] = data->red; | |
399 | data->args[1] = data->green; | |
400 | data->args[2] = data->blue; | |
401 | blinkm_write(client, cmd, NULL); | |
402 | blinkm_read(client, cmd, data->args); | |
403 | data->red = data->args[0]; | |
404 | data->green = data->args[1]; | |
405 | data->blue = data->args[2]; | |
406 | break; | |
407 | case BLM_GET_ADDR: | |
408 | data->args[0] = data->i2c_addr; | |
409 | blinkm_write(client, cmd, NULL); | |
410 | blinkm_read(client, cmd, data->args); | |
411 | data->i2c_addr = data->args[0]; | |
412 | break; | |
413 | case BLM_SET_TIME_ADJ: | |
414 | case BLM_SET_FADE_SPEED: | |
415 | case BLM_READ_SCRIPT_LINE: | |
416 | case BLM_WRITE_SCRIPT_LINE: | |
417 | case BLM_SET_SCRIPT_LR: | |
418 | case BLM_SET_ADDR: | |
419 | case BLM_GET_FW_VER: | |
420 | case BLM_SET_STARTUP_PARAM: | |
421 | dev_err(&client->dev, | |
422 | "BlinkM: cmd %d not implemented yet.\n", cmd); | |
423 | break; | |
424 | default: | |
425 | dev_err(&client->dev, "BlinkM: unknown command %d\n", cmd); | |
426 | mutex_unlock(&data->update_lock); | |
427 | return -EINVAL; | |
428 | } /* end switch(cmd) */ | |
429 | ||
430 | /* transfers done, unlock */ | |
431 | mutex_unlock(&data->update_lock); | |
432 | return 0; | |
433 | } | |
434 | ||
b54cf35a JSM |
435 | static int blinkm_led_common_set(struct led_classdev *led_cdev, |
436 | enum led_brightness value, int color) | |
437 | { | |
438 | /* led_brightness is 0, 127 or 255 - we just use it here as-is */ | |
439 | struct blinkm_led *led = cdev_to_blmled(led_cdev); | |
440 | struct blinkm_data *data = i2c_get_clientdata(led->i2c_client); | |
b54cf35a JSM |
441 | |
442 | switch (color) { | |
443 | case RED: | |
444 | /* bail out if there's no change */ | |
445 | if (data->next_red == (u8) value) | |
446 | return 0; | |
b54cf35a JSM |
447 | data->next_red = (u8) value; |
448 | break; | |
449 | case GREEN: | |
450 | /* bail out if there's no change */ | |
451 | if (data->next_green == (u8) value) | |
452 | return 0; | |
b54cf35a JSM |
453 | data->next_green = (u8) value; |
454 | break; | |
455 | case BLUE: | |
456 | /* bail out if there's no change */ | |
457 | if (data->next_blue == (u8) value) | |
458 | return 0; | |
b54cf35a JSM |
459 | data->next_blue = (u8) value; |
460 | break; | |
461 | ||
462 | default: | |
463 | dev_err(&led->i2c_client->dev, "BlinkM: unknown color.\n"); | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
7e1761b0 | 467 | blinkm_transfer_hw(led->i2c_client, BLM_GO_RGB); |
b54cf35a | 468 | dev_dbg(&led->i2c_client->dev, |
7e1761b0 AL |
469 | "# DONE # next_red = %d, next_green = %d," |
470 | " next_blue = %d\n", | |
b54cf35a | 471 | data->next_red, data->next_green, |
7e1761b0 | 472 | data->next_blue); |
b54cf35a JSM |
473 | return 0; |
474 | } | |
475 | ||
7e1761b0 | 476 | static int blinkm_led_red_set(struct led_classdev *led_cdev, |
b54cf35a JSM |
477 | enum led_brightness value) |
478 | { | |
7e1761b0 | 479 | return blinkm_led_common_set(led_cdev, value, RED); |
b54cf35a JSM |
480 | } |
481 | ||
7e1761b0 | 482 | static int blinkm_led_green_set(struct led_classdev *led_cdev, |
b54cf35a JSM |
483 | enum led_brightness value) |
484 | { | |
7e1761b0 | 485 | return blinkm_led_common_set(led_cdev, value, GREEN); |
b54cf35a JSM |
486 | } |
487 | ||
7e1761b0 | 488 | static int blinkm_led_blue_set(struct led_classdev *led_cdev, |
b54cf35a JSM |
489 | enum led_brightness value) |
490 | { | |
7e1761b0 | 491 | return blinkm_led_common_set(led_cdev, value, BLUE); |
b54cf35a JSM |
492 | } |
493 | ||
494 | static void blinkm_init_hw(struct i2c_client *client) | |
495 | { | |
496 | int ret; | |
497 | ret = blinkm_transfer_hw(client, BLM_STOP_SCRIPT); | |
498 | ret = blinkm_transfer_hw(client, BLM_GO_RGB); | |
499 | } | |
500 | ||
501 | static int blinkm_test_run(struct i2c_client *client) | |
502 | { | |
503 | int ret; | |
504 | struct blinkm_data *data = i2c_get_clientdata(client); | |
505 | ||
506 | data->next_red = 0x01; | |
507 | data->next_green = 0x05; | |
508 | data->next_blue = 0x10; | |
509 | ret = blinkm_transfer_hw(client, BLM_GO_RGB); | |
510 | if (ret < 0) | |
511 | return ret; | |
512 | msleep(2000); | |
513 | ||
514 | data->next_red = 0x25; | |
515 | data->next_green = 0x10; | |
516 | data->next_blue = 0x31; | |
517 | ret = blinkm_transfer_hw(client, BLM_FADE_RGB); | |
518 | if (ret < 0) | |
519 | return ret; | |
520 | msleep(2000); | |
521 | ||
522 | data->next_hue = 0x50; | |
523 | data->next_saturation = 0x10; | |
524 | data->next_brightness = 0x20; | |
525 | ret = blinkm_transfer_hw(client, BLM_FADE_HSB); | |
526 | if (ret < 0) | |
527 | return ret; | |
528 | msleep(2000); | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | /* Return 0 if detection is successful, -ENODEV otherwise */ | |
534 | static int blinkm_detect(struct i2c_client *client, struct i2c_board_info *info) | |
535 | { | |
536 | struct i2c_adapter *adapter = client->adapter; | |
537 | int ret; | |
538 | int count = 99; | |
539 | u8 tmpargs[7]; | |
540 | ||
541 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | |
542 | | I2C_FUNC_SMBUS_WORD_DATA | |
543 | | I2C_FUNC_SMBUS_WRITE_BYTE)) | |
544 | return -ENODEV; | |
545 | ||
546 | /* Now, we do the remaining detection. Simple for now. */ | |
547 | /* We might need more guards to protect other i2c slaves */ | |
548 | ||
549 | /* make sure the blinkM is balanced (read/writes) */ | |
550 | while (count > 0) { | |
551 | ret = blinkm_write(client, BLM_GET_ADDR, NULL); | |
e0d42298 AB |
552 | if (ret) |
553 | return ret; | |
b54cf35a JSM |
554 | usleep_range(5000, 10000); |
555 | ret = blinkm_read(client, BLM_GET_ADDR, tmpargs); | |
e0d42298 AB |
556 | if (ret) |
557 | return ret; | |
b54cf35a JSM |
558 | usleep_range(5000, 10000); |
559 | if (tmpargs[0] == 0x09) | |
560 | count = 0; | |
561 | count--; | |
562 | } | |
563 | ||
564 | /* Step 1: Read BlinkM address back - cmd_char 'a' */ | |
565 | ret = blinkm_write(client, BLM_GET_ADDR, NULL); | |
566 | if (ret < 0) | |
18d4a06f | 567 | return ret; |
b54cf35a JSM |
568 | usleep_range(20000, 30000); /* allow a small delay */ |
569 | ret = blinkm_read(client, BLM_GET_ADDR, tmpargs); | |
570 | if (ret < 0) | |
18d4a06f | 571 | return ret; |
b54cf35a JSM |
572 | |
573 | if (tmpargs[0] != 0x09) { | |
574 | dev_err(&client->dev, "enodev DEV ADDR = 0x%02X\n", tmpargs[0]); | |
575 | return -ENODEV; | |
576 | } | |
577 | ||
578 | strlcpy(info->type, "blinkm", I2C_NAME_SIZE); | |
579 | return 0; | |
580 | } | |
581 | ||
98ea1ea2 | 582 | static int blinkm_probe(struct i2c_client *client, |
b54cf35a JSM |
583 | const struct i2c_device_id *id) |
584 | { | |
585 | struct blinkm_data *data; | |
586 | struct blinkm_led *led[3]; | |
587 | int err, i; | |
588 | char blinkm_led_name[28]; | |
589 | ||
590 | data = devm_kzalloc(&client->dev, | |
591 | sizeof(struct blinkm_data), GFP_KERNEL); | |
592 | if (!data) { | |
593 | err = -ENOMEM; | |
594 | goto exit; | |
595 | } | |
596 | ||
597 | data->i2c_addr = 0x09; | |
598 | data->i2c_addr = 0x08; | |
599 | /* i2c addr - use fake addr of 0x08 initially (real is 0x09) */ | |
600 | data->fw_ver = 0xfe; | |
601 | /* firmware version - use fake until we read real value | |
602 | * (currently broken - BlinkM confused!) */ | |
603 | data->script_id = 0x01; | |
604 | data->i2c_client = client; | |
605 | ||
606 | i2c_set_clientdata(client, data); | |
607 | mutex_init(&data->update_lock); | |
608 | ||
609 | /* Register sysfs hooks */ | |
610 | err = sysfs_create_group(&client->dev.kobj, &blinkm_group); | |
611 | if (err < 0) { | |
612 | dev_err(&client->dev, "couldn't register sysfs group\n"); | |
613 | goto exit; | |
614 | } | |
615 | ||
616 | for (i = 0; i < 3; i++) { | |
617 | /* RED = 0, GREEN = 1, BLUE = 2 */ | |
618 | led[i] = &data->blinkm_leds[i]; | |
619 | led[i]->i2c_client = client; | |
620 | led[i]->id = i; | |
621 | led[i]->led_cdev.max_brightness = 255; | |
622 | led[i]->led_cdev.flags = LED_CORE_SUSPENDRESUME; | |
b54cf35a JSM |
623 | switch (i) { |
624 | case RED: | |
625 | snprintf(blinkm_led_name, sizeof(blinkm_led_name), | |
626 | "blinkm-%d-%d-red", | |
627 | client->adapter->nr, | |
628 | client->addr); | |
629 | led[i]->led_cdev.name = blinkm_led_name; | |
7e1761b0 AL |
630 | led[i]->led_cdev.brightness_set_blocking = |
631 | blinkm_led_red_set; | |
b54cf35a JSM |
632 | err = led_classdev_register(&client->dev, |
633 | &led[i]->led_cdev); | |
634 | if (err < 0) { | |
635 | dev_err(&client->dev, | |
636 | "couldn't register LED %s\n", | |
637 | led[i]->led_cdev.name); | |
638 | goto failred; | |
639 | } | |
640 | break; | |
641 | case GREEN: | |
642 | snprintf(blinkm_led_name, sizeof(blinkm_led_name), | |
643 | "blinkm-%d-%d-green", | |
644 | client->adapter->nr, | |
645 | client->addr); | |
646 | led[i]->led_cdev.name = blinkm_led_name; | |
7e1761b0 AL |
647 | led[i]->led_cdev.brightness_set_blocking = |
648 | blinkm_led_green_set; | |
b54cf35a JSM |
649 | err = led_classdev_register(&client->dev, |
650 | &led[i]->led_cdev); | |
651 | if (err < 0) { | |
652 | dev_err(&client->dev, | |
653 | "couldn't register LED %s\n", | |
654 | led[i]->led_cdev.name); | |
655 | goto failgreen; | |
656 | } | |
657 | break; | |
658 | case BLUE: | |
659 | snprintf(blinkm_led_name, sizeof(blinkm_led_name), | |
660 | "blinkm-%d-%d-blue", | |
661 | client->adapter->nr, | |
662 | client->addr); | |
663 | led[i]->led_cdev.name = blinkm_led_name; | |
7e1761b0 AL |
664 | led[i]->led_cdev.brightness_set_blocking = |
665 | blinkm_led_blue_set; | |
b54cf35a JSM |
666 | err = led_classdev_register(&client->dev, |
667 | &led[i]->led_cdev); | |
668 | if (err < 0) { | |
669 | dev_err(&client->dev, | |
670 | "couldn't register LED %s\n", | |
671 | led[i]->led_cdev.name); | |
672 | goto failblue; | |
673 | } | |
674 | break; | |
675 | } /* end switch */ | |
676 | } /* end for */ | |
677 | ||
678 | /* Initialize the blinkm */ | |
679 | blinkm_init_hw(client); | |
680 | ||
681 | return 0; | |
682 | ||
683 | failblue: | |
684 | led_classdev_unregister(&led[GREEN]->led_cdev); | |
685 | ||
686 | failgreen: | |
687 | led_classdev_unregister(&led[RED]->led_cdev); | |
688 | ||
689 | failred: | |
690 | sysfs_remove_group(&client->dev.kobj, &blinkm_group); | |
691 | exit: | |
692 | return err; | |
693 | } | |
694 | ||
678e8a6b | 695 | static int blinkm_remove(struct i2c_client *client) |
b54cf35a JSM |
696 | { |
697 | struct blinkm_data *data = i2c_get_clientdata(client); | |
698 | int ret = 0; | |
699 | int i; | |
700 | ||
701 | /* make sure no workqueue entries are pending */ | |
7e1761b0 | 702 | for (i = 0; i < 3; i++) |
b54cf35a | 703 | led_classdev_unregister(&data->blinkm_leds[i].led_cdev); |
b54cf35a JSM |
704 | |
705 | /* reset rgb */ | |
706 | data->next_red = 0x00; | |
707 | data->next_green = 0x00; | |
708 | data->next_blue = 0x00; | |
709 | ret = blinkm_transfer_hw(client, BLM_FADE_RGB); | |
710 | if (ret < 0) | |
711 | dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n"); | |
712 | ||
713 | /* reset hsb */ | |
714 | data->next_hue = 0x00; | |
715 | data->next_saturation = 0x00; | |
716 | data->next_brightness = 0x00; | |
717 | ret = blinkm_transfer_hw(client, BLM_FADE_HSB); | |
718 | if (ret < 0) | |
719 | dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n"); | |
720 | ||
721 | /* red fade to off */ | |
722 | data->next_red = 0xff; | |
723 | ret = blinkm_transfer_hw(client, BLM_GO_RGB); | |
724 | if (ret < 0) | |
725 | dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n"); | |
726 | ||
727 | /* off */ | |
728 | data->next_red = 0x00; | |
729 | ret = blinkm_transfer_hw(client, BLM_FADE_RGB); | |
730 | if (ret < 0) | |
731 | dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n"); | |
732 | ||
733 | sysfs_remove_group(&client->dev.kobj, &blinkm_group); | |
734 | return 0; | |
735 | } | |
736 | ||
737 | static const struct i2c_device_id blinkm_id[] = { | |
738 | {"blinkm", 0}, | |
739 | {} | |
740 | }; | |
741 | ||
742 | MODULE_DEVICE_TABLE(i2c, blinkm_id); | |
743 | ||
744 | /* This is the driver that will be inserted */ | |
745 | static struct i2c_driver blinkm_driver = { | |
746 | .class = I2C_CLASS_HWMON, | |
747 | .driver = { | |
748 | .name = "blinkm", | |
749 | }, | |
750 | .probe = blinkm_probe, | |
df07cf81 | 751 | .remove = blinkm_remove, |
b54cf35a JSM |
752 | .id_table = blinkm_id, |
753 | .detect = blinkm_detect, | |
754 | .address_list = normal_i2c, | |
755 | }; | |
756 | ||
757 | module_i2c_driver(blinkm_driver); | |
758 | ||
759 | MODULE_AUTHOR("Jan-Simon Moeller <dl9pf@gmx.de>"); | |
760 | MODULE_DESCRIPTION("BlinkM RGB LED driver"); | |
761 | MODULE_LICENSE("GPL"); | |
762 |