Commit | Line | Data |
---|---|---|
500fe141 SO |
1 | /* |
2 | * LP5521 LED chip driver. | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
5 | * | |
6 | * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/i2c.h> | |
26 | #include <linux/mutex.h> | |
27 | #include <linux/gpio.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/ctype.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/wait.h> | |
33 | #include <linux/leds.h> | |
34 | #include <linux/leds-lp5521.h> | |
35 | #include <linux/workqueue.h> | |
36 | #include <linux/slab.h> | |
6a0c9a47 MWK |
37 | #include <linux/platform_data/leds-lp55xx.h> |
38 | ||
39 | #include "leds-lp55xx-common.h" | |
500fe141 SO |
40 | |
41 | #define LP5521_PROGRAM_LENGTH 32 /* in bytes */ | |
42 | ||
43 | #define LP5521_MAX_LEDS 3 /* Maximum number of LEDs */ | |
44 | #define LP5521_MAX_ENGINES 3 /* Maximum number of engines */ | |
45 | ||
46 | #define LP5521_ENG_MASK_BASE 0x30 /* 00110000 */ | |
47 | #define LP5521_ENG_STATUS_MASK 0x07 /* 00000111 */ | |
48 | ||
49 | #define LP5521_CMD_LOAD 0x15 /* 00010101 */ | |
50 | #define LP5521_CMD_RUN 0x2a /* 00101010 */ | |
51 | #define LP5521_CMD_DIRECT 0x3f /* 00111111 */ | |
52 | #define LP5521_CMD_DISABLED 0x00 /* 00000000 */ | |
53 | ||
54 | /* Registers */ | |
55 | #define LP5521_REG_ENABLE 0x00 | |
56 | #define LP5521_REG_OP_MODE 0x01 | |
57 | #define LP5521_REG_R_PWM 0x02 | |
58 | #define LP5521_REG_G_PWM 0x03 | |
59 | #define LP5521_REG_B_PWM 0x04 | |
60 | #define LP5521_REG_R_CURRENT 0x05 | |
61 | #define LP5521_REG_G_CURRENT 0x06 | |
62 | #define LP5521_REG_B_CURRENT 0x07 | |
63 | #define LP5521_REG_CONFIG 0x08 | |
64 | #define LP5521_REG_R_CHANNEL_PC 0x09 | |
65 | #define LP5521_REG_G_CHANNEL_PC 0x0A | |
66 | #define LP5521_REG_B_CHANNEL_PC 0x0B | |
67 | #define LP5521_REG_STATUS 0x0C | |
68 | #define LP5521_REG_RESET 0x0D | |
69 | #define LP5521_REG_GPO 0x0E | |
70 | #define LP5521_REG_R_PROG_MEM 0x10 | |
71 | #define LP5521_REG_G_PROG_MEM 0x30 | |
72 | #define LP5521_REG_B_PROG_MEM 0x50 | |
73 | ||
74 | #define LP5521_PROG_MEM_BASE LP5521_REG_R_PROG_MEM | |
75 | #define LP5521_PROG_MEM_SIZE 0x20 | |
76 | ||
77 | /* Base register to set LED current */ | |
78 | #define LP5521_REG_LED_CURRENT_BASE LP5521_REG_R_CURRENT | |
79 | ||
80 | /* Base register to set the brightness */ | |
81 | #define LP5521_REG_LED_PWM_BASE LP5521_REG_R_PWM | |
82 | ||
83 | /* Bits in ENABLE register */ | |
84 | #define LP5521_MASTER_ENABLE 0x40 /* Chip master enable */ | |
85 | #define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ | |
86 | #define LP5521_EXEC_RUN 0x2A | |
32a2f747 KM |
87 | #define LP5521_ENABLE_DEFAULT \ |
88 | (LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM) | |
89 | #define LP5521_ENABLE_RUN_PROGRAM \ | |
90 | (LP5521_ENABLE_DEFAULT | LP5521_EXEC_RUN) | |
500fe141 | 91 | |
500fe141 SO |
92 | /* Status */ |
93 | #define LP5521_EXT_CLK_USED 0x08 | |
94 | ||
b3c49c05 SK |
95 | /* default R channel current register value */ |
96 | #define LP5521_REG_R_CURR_DEFAULT 0xAF | |
97 | ||
011af7bc KM |
98 | /* Pattern Mode */ |
99 | #define PATTERN_OFF 0 | |
100 | ||
48068d5d MWK |
101 | /* Reset register value */ |
102 | #define LP5521_RESET 0xFF | |
103 | ||
500fe141 | 104 | struct lp5521_engine { |
500fe141 SO |
105 | int id; |
106 | u8 mode; | |
107 | u8 prog_page; | |
108 | u8 engine_mask; | |
109 | }; | |
110 | ||
111 | struct lp5521_led { | |
112 | int id; | |
113 | u8 chan_nr; | |
114 | u8 led_current; | |
115 | u8 max_current; | |
116 | struct led_classdev cdev; | |
117 | struct work_struct brightness_work; | |
118 | u8 brightness; | |
119 | }; | |
120 | ||
121 | struct lp5521_chip { | |
122 | struct lp5521_platform_data *pdata; | |
123 | struct mutex lock; /* Serialize control */ | |
124 | struct i2c_client *client; | |
125 | struct lp5521_engine engines[LP5521_MAX_ENGINES]; | |
126 | struct lp5521_led leds[LP5521_MAX_LEDS]; | |
127 | u8 num_channels; | |
128 | u8 num_leds; | |
129 | }; | |
130 | ||
94482174 MWK |
131 | static inline void lp5521_wait_enable_done(void) |
132 | { | |
133 | /* it takes more 488 us to update ENABLE register */ | |
134 | usleep_range(500, 600); | |
135 | } | |
136 | ||
a96bfa13 MWK |
137 | static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current) |
138 | { | |
139 | led->led_current = led_current; | |
140 | lp55xx_write(led->chip, LP5521_REG_LED_CURRENT_BASE + led->chan_nr, | |
141 | led_current); | |
142 | } | |
143 | ||
9fdb18b6 SO |
144 | static inline struct lp5521_led *cdev_to_led(struct led_classdev *cdev) |
145 | { | |
146 | return container_of(cdev, struct lp5521_led, cdev); | |
147 | } | |
148 | ||
149 | static inline struct lp5521_chip *engine_to_lp5521(struct lp5521_engine *engine) | |
150 | { | |
151 | return container_of(engine, struct lp5521_chip, | |
152 | engines[engine->id - 1]); | |
153 | } | |
154 | ||
155 | static inline struct lp5521_chip *led_to_lp5521(struct lp5521_led *led) | |
156 | { | |
157 | return container_of(led, struct lp5521_chip, | |
158 | leds[led->id]); | |
159 | } | |
500fe141 | 160 | |
500fe141 SO |
161 | static inline int lp5521_write(struct i2c_client *client, u8 reg, u8 value) |
162 | { | |
163 | return i2c_smbus_write_byte_data(client, reg, value); | |
164 | } | |
165 | ||
166 | static int lp5521_read(struct i2c_client *client, u8 reg, u8 *buf) | |
167 | { | |
168 | s32 ret; | |
169 | ||
170 | ret = i2c_smbus_read_byte_data(client, reg); | |
171 | if (ret < 0) | |
313e8b50 | 172 | return ret; |
500fe141 SO |
173 | |
174 | *buf = ret; | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static int lp5521_set_engine_mode(struct lp5521_engine *engine, u8 mode) | |
179 | { | |
180 | struct lp5521_chip *chip = engine_to_lp5521(engine); | |
181 | struct i2c_client *client = chip->client; | |
182 | int ret; | |
183 | u8 engine_state; | |
184 | ||
185 | /* Only transition between RUN and DIRECT mode are handled here */ | |
186 | if (mode == LP5521_CMD_LOAD) | |
187 | return 0; | |
188 | ||
189 | if (mode == LP5521_CMD_DISABLED) | |
190 | mode = LP5521_CMD_DIRECT; | |
191 | ||
192 | ret = lp5521_read(client, LP5521_REG_OP_MODE, &engine_state); | |
fa0ea0e1 AL |
193 | if (ret < 0) |
194 | return ret; | |
500fe141 SO |
195 | |
196 | /* set mode only for this engine */ | |
197 | engine_state &= ~(engine->engine_mask); | |
198 | mode &= engine->engine_mask; | |
199 | engine_state |= mode; | |
fa0ea0e1 | 200 | return lp5521_write(client, LP5521_REG_OP_MODE, engine_state); |
500fe141 SO |
201 | } |
202 | ||
203 | static int lp5521_load_program(struct lp5521_engine *eng, const u8 *pattern) | |
204 | { | |
205 | struct lp5521_chip *chip = engine_to_lp5521(eng); | |
206 | struct i2c_client *client = chip->client; | |
207 | int ret; | |
208 | int addr; | |
209 | u8 mode; | |
210 | ||
211 | /* move current engine to direct mode and remember the state */ | |
212 | ret = lp5521_set_engine_mode(eng, LP5521_CMD_DIRECT); | |
5bc9ad77 DC |
213 | if (ret) |
214 | return ret; | |
215 | ||
09c76b0f SO |
216 | /* Mode change requires min 500 us delay. 1 - 2 ms with margin */ |
217 | usleep_range(1000, 2000); | |
5bc9ad77 DC |
218 | ret = lp5521_read(client, LP5521_REG_OP_MODE, &mode); |
219 | if (ret) | |
220 | return ret; | |
500fe141 SO |
221 | |
222 | /* For loading, all the engines to load mode */ | |
223 | lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); | |
09c76b0f SO |
224 | /* Mode change requires min 500 us delay. 1 - 2 ms with margin */ |
225 | usleep_range(1000, 2000); | |
500fe141 | 226 | lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_LOAD); |
09c76b0f SO |
227 | /* Mode change requires min 500 us delay. 1 - 2 ms with margin */ |
228 | usleep_range(1000, 2000); | |
500fe141 SO |
229 | |
230 | addr = LP5521_PROG_MEM_BASE + eng->prog_page * LP5521_PROG_MEM_SIZE; | |
231 | i2c_smbus_write_i2c_block_data(client, | |
232 | addr, | |
233 | LP5521_PROG_MEM_SIZE, | |
234 | pattern); | |
235 | ||
5bc9ad77 | 236 | return lp5521_write(client, LP5521_REG_OP_MODE, mode); |
500fe141 SO |
237 | } |
238 | ||
ffbdccdb | 239 | static int lp5521_post_init_device(struct lp55xx_chip *chip) |
500fe141 | 240 | { |
500fe141 | 241 | int ret; |
94482174 | 242 | u8 val; |
500fe141 | 243 | |
94482174 MWK |
244 | /* |
245 | * Make sure that the chip is reset by reading back the r channel | |
246 | * current reg. This is dummy read is required on some platforms - | |
247 | * otherwise further access to the R G B channels in the | |
248 | * LP5521_REG_ENABLE register will not have any effect - strange! | |
249 | */ | |
ffbdccdb | 250 | ret = lp55xx_read(chip, LP5521_REG_R_CURRENT, &val); |
94482174 | 251 | if (ret) { |
ffbdccdb | 252 | dev_err(&chip->cl->dev, "error in resetting chip\n"); |
94482174 MWK |
253 | return ret; |
254 | } | |
255 | if (val != LP5521_REG_R_CURR_DEFAULT) { | |
ffbdccdb | 256 | dev_err(&chip->cl->dev, |
94482174 MWK |
257 | "unexpected data in register (expected 0x%x got 0x%x)\n", |
258 | LP5521_REG_R_CURR_DEFAULT, val); | |
259 | ret = -EINVAL; | |
260 | return ret; | |
261 | } | |
262 | usleep_range(10000, 20000); | |
500fe141 | 263 | |
500fe141 | 264 | /* Set all PWMs to direct control mode */ |
ffbdccdb | 265 | ret = lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); |
500fe141 | 266 | |
ffbdccdb | 267 | val = chip->pdata->update_config ? |
3b49aacd | 268 | : (LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT); |
ffbdccdb | 269 | ret = lp55xx_write(chip, LP5521_REG_CONFIG, val); |
94482174 MWK |
270 | if (ret) |
271 | return ret; | |
500fe141 SO |
272 | |
273 | /* Initialize all channels PWM to zero -> leds off */ | |
ffbdccdb MWK |
274 | lp55xx_write(chip, LP5521_REG_R_PWM, 0); |
275 | lp55xx_write(chip, LP5521_REG_G_PWM, 0); | |
276 | lp55xx_write(chip, LP5521_REG_B_PWM, 0); | |
500fe141 SO |
277 | |
278 | /* Set engines are set to run state when OP_MODE enables engines */ | |
ffbdccdb | 279 | ret = lp55xx_write(chip, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM); |
94482174 MWK |
280 | if (ret) |
281 | return ret; | |
500fe141 | 282 | |
94482174 MWK |
283 | lp5521_wait_enable_done(); |
284 | ||
285 | return 0; | |
500fe141 SO |
286 | } |
287 | ||
288 | static int lp5521_run_selftest(struct lp5521_chip *chip, char *buf) | |
289 | { | |
290 | int ret; | |
291 | u8 status; | |
292 | ||
293 | ret = lp5521_read(chip->client, LP5521_REG_STATUS, &status); | |
294 | if (ret < 0) | |
295 | return ret; | |
296 | ||
297 | /* Check that ext clock is really in use if requested */ | |
298 | if (chip->pdata && chip->pdata->clock_mode == LP5521_CLOCK_EXT) | |
299 | if ((status & LP5521_EXT_CLK_USED) == 0) | |
300 | return -EIO; | |
301 | return 0; | |
302 | } | |
303 | ||
500fe141 SO |
304 | static void lp5521_led_brightness_work(struct work_struct *work) |
305 | { | |
a6e4679a | 306 | struct lp55xx_led *led = container_of(work, struct lp55xx_led, |
500fe141 | 307 | brightness_work); |
a6e4679a | 308 | struct lp55xx_chip *chip = led->chip; |
500fe141 SO |
309 | |
310 | mutex_lock(&chip->lock); | |
a6e4679a | 311 | lp55xx_write(chip, LP5521_REG_LED_PWM_BASE + led->chan_nr, |
500fe141 SO |
312 | led->brightness); |
313 | mutex_unlock(&chip->lock); | |
314 | } | |
315 | ||
500fe141 SO |
316 | /* Set engine mode and create appropriate sysfs attributes, if required. */ |
317 | static int lp5521_set_mode(struct lp5521_engine *engine, u8 mode) | |
318 | { | |
500fe141 SO |
319 | int ret = 0; |
320 | ||
321 | /* if in that mode already do nothing, except for run */ | |
322 | if (mode == engine->mode && mode != LP5521_CMD_RUN) | |
323 | return 0; | |
324 | ||
325 | if (mode == LP5521_CMD_RUN) { | |
326 | ret = lp5521_set_engine_mode(engine, LP5521_CMD_RUN); | |
327 | } else if (mode == LP5521_CMD_LOAD) { | |
328 | lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED); | |
329 | lp5521_set_engine_mode(engine, LP5521_CMD_LOAD); | |
500fe141 SO |
330 | } else if (mode == LP5521_CMD_DISABLED) { |
331 | lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED); | |
332 | } | |
333 | ||
500fe141 SO |
334 | engine->mode = mode; |
335 | ||
336 | return ret; | |
337 | } | |
338 | ||
339 | static int lp5521_do_store_load(struct lp5521_engine *engine, | |
340 | const char *buf, size_t len) | |
341 | { | |
342 | struct lp5521_chip *chip = engine_to_lp5521(engine); | |
343 | struct i2c_client *client = chip->client; | |
344 | int ret, nrchars, offset = 0, i = 0; | |
345 | char c[3]; | |
346 | unsigned cmd; | |
347 | u8 pattern[LP5521_PROGRAM_LENGTH] = {0}; | |
348 | ||
349 | while ((offset < len - 1) && (i < LP5521_PROGRAM_LENGTH)) { | |
350 | /* separate sscanfs because length is working only for %s */ | |
351 | ret = sscanf(buf + offset, "%2s%n ", c, &nrchars); | |
2260209c VK |
352 | if (ret != 2) |
353 | goto fail; | |
500fe141 SO |
354 | ret = sscanf(c, "%2x", &cmd); |
355 | if (ret != 1) | |
356 | goto fail; | |
357 | pattern[i] = (u8)cmd; | |
358 | ||
359 | offset += nrchars; | |
360 | i++; | |
361 | } | |
362 | ||
363 | /* Each instruction is 16bit long. Check that length is even */ | |
364 | if (i % 2) | |
365 | goto fail; | |
366 | ||
367 | mutex_lock(&chip->lock); | |
d4e7ad03 SO |
368 | if (engine->mode == LP5521_CMD_LOAD) |
369 | ret = lp5521_load_program(engine, pattern); | |
370 | else | |
371 | ret = -EINVAL; | |
500fe141 SO |
372 | mutex_unlock(&chip->lock); |
373 | ||
374 | if (ret) { | |
375 | dev_err(&client->dev, "failed loading pattern\n"); | |
376 | return ret; | |
377 | } | |
378 | ||
379 | return len; | |
380 | fail: | |
381 | dev_err(&client->dev, "wrong pattern format\n"); | |
382 | return -EINVAL; | |
383 | } | |
384 | ||
385 | static ssize_t store_engine_load(struct device *dev, | |
386 | struct device_attribute *attr, | |
387 | const char *buf, size_t len, int nr) | |
388 | { | |
389 | struct i2c_client *client = to_i2c_client(dev); | |
390 | struct lp5521_chip *chip = i2c_get_clientdata(client); | |
391 | return lp5521_do_store_load(&chip->engines[nr - 1], buf, len); | |
392 | } | |
393 | ||
394 | #define store_load(nr) \ | |
395 | static ssize_t store_engine##nr##_load(struct device *dev, \ | |
396 | struct device_attribute *attr, \ | |
397 | const char *buf, size_t len) \ | |
398 | { \ | |
399 | return store_engine_load(dev, attr, buf, len, nr); \ | |
400 | } | |
401 | store_load(1) | |
402 | store_load(2) | |
403 | store_load(3) | |
404 | ||
405 | static ssize_t show_engine_mode(struct device *dev, | |
406 | struct device_attribute *attr, | |
407 | char *buf, int nr) | |
408 | { | |
409 | struct i2c_client *client = to_i2c_client(dev); | |
410 | struct lp5521_chip *chip = i2c_get_clientdata(client); | |
411 | switch (chip->engines[nr - 1].mode) { | |
412 | case LP5521_CMD_RUN: | |
413 | return sprintf(buf, "run\n"); | |
414 | case LP5521_CMD_LOAD: | |
415 | return sprintf(buf, "load\n"); | |
416 | case LP5521_CMD_DISABLED: | |
417 | return sprintf(buf, "disabled\n"); | |
418 | default: | |
419 | return sprintf(buf, "disabled\n"); | |
420 | } | |
421 | } | |
422 | ||
423 | #define show_mode(nr) \ | |
424 | static ssize_t show_engine##nr##_mode(struct device *dev, \ | |
425 | struct device_attribute *attr, \ | |
426 | char *buf) \ | |
427 | { \ | |
428 | return show_engine_mode(dev, attr, buf, nr); \ | |
429 | } | |
430 | show_mode(1) | |
431 | show_mode(2) | |
432 | show_mode(3) | |
433 | ||
434 | static ssize_t store_engine_mode(struct device *dev, | |
435 | struct device_attribute *attr, | |
436 | const char *buf, size_t len, int nr) | |
437 | { | |
438 | struct i2c_client *client = to_i2c_client(dev); | |
439 | struct lp5521_chip *chip = i2c_get_clientdata(client); | |
440 | struct lp5521_engine *engine = &chip->engines[nr - 1]; | |
441 | mutex_lock(&chip->lock); | |
442 | ||
443 | if (!strncmp(buf, "run", 3)) | |
444 | lp5521_set_mode(engine, LP5521_CMD_RUN); | |
445 | else if (!strncmp(buf, "load", 4)) | |
446 | lp5521_set_mode(engine, LP5521_CMD_LOAD); | |
447 | else if (!strncmp(buf, "disabled", 8)) | |
448 | lp5521_set_mode(engine, LP5521_CMD_DISABLED); | |
449 | ||
450 | mutex_unlock(&chip->lock); | |
451 | return len; | |
452 | } | |
453 | ||
454 | #define store_mode(nr) \ | |
455 | static ssize_t store_engine##nr##_mode(struct device *dev, \ | |
456 | struct device_attribute *attr, \ | |
457 | const char *buf, size_t len) \ | |
458 | { \ | |
459 | return store_engine_mode(dev, attr, buf, len, nr); \ | |
460 | } | |
461 | store_mode(1) | |
462 | store_mode(2) | |
463 | store_mode(3) | |
464 | ||
500fe141 SO |
465 | static ssize_t lp5521_selftest(struct device *dev, |
466 | struct device_attribute *attr, | |
467 | char *buf) | |
468 | { | |
469 | struct i2c_client *client = to_i2c_client(dev); | |
470 | struct lp5521_chip *chip = i2c_get_clientdata(client); | |
471 | int ret; | |
472 | ||
473 | mutex_lock(&chip->lock); | |
474 | ret = lp5521_run_selftest(chip, buf); | |
475 | mutex_unlock(&chip->lock); | |
476 | return sprintf(buf, "%s\n", ret ? "FAIL" : "OK"); | |
477 | } | |
478 | ||
011af7bc KM |
479 | static void lp5521_clear_program_memory(struct i2c_client *cl) |
480 | { | |
481 | int i; | |
482 | u8 rgb_mem[] = { | |
483 | LP5521_REG_R_PROG_MEM, | |
484 | LP5521_REG_G_PROG_MEM, | |
485 | LP5521_REG_B_PROG_MEM, | |
486 | }; | |
487 | ||
488 | for (i = 0; i < ARRAY_SIZE(rgb_mem); i++) { | |
489 | lp5521_write(cl, rgb_mem[i], 0); | |
490 | lp5521_write(cl, rgb_mem[i] + 1, 0); | |
491 | } | |
492 | } | |
493 | ||
494 | static void lp5521_write_program_memory(struct i2c_client *cl, | |
495 | u8 base, u8 *rgb, int size) | |
496 | { | |
497 | int i; | |
498 | ||
499 | if (!rgb || size <= 0) | |
500 | return; | |
501 | ||
502 | for (i = 0; i < size; i++) | |
503 | lp5521_write(cl, base + i, *(rgb + i)); | |
504 | ||
505 | lp5521_write(cl, base + i, 0); | |
506 | lp5521_write(cl, base + i + 1, 0); | |
507 | } | |
508 | ||
509 | static inline struct lp5521_led_pattern *lp5521_get_pattern | |
510 | (struct lp5521_chip *chip, u8 offset) | |
511 | { | |
512 | struct lp5521_led_pattern *ptn; | |
513 | ptn = chip->pdata->patterns + (offset - 1); | |
514 | return ptn; | |
515 | } | |
516 | ||
517 | static void lp5521_run_led_pattern(int mode, struct lp5521_chip *chip) | |
518 | { | |
519 | struct lp5521_led_pattern *ptn; | |
520 | struct i2c_client *cl = chip->client; | |
521 | int num_patterns = chip->pdata->num_patterns; | |
522 | ||
523 | if (mode > num_patterns || !(chip->pdata->patterns)) | |
524 | return; | |
525 | ||
526 | if (mode == PATTERN_OFF) { | |
32a2f747 | 527 | lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_DEFAULT); |
011af7bc KM |
528 | usleep_range(1000, 2000); |
529 | lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); | |
530 | } else { | |
531 | ptn = lp5521_get_pattern(chip, mode); | |
532 | if (!ptn) | |
533 | return; | |
534 | ||
535 | lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_LOAD); | |
536 | usleep_range(1000, 2000); | |
537 | ||
538 | lp5521_clear_program_memory(cl); | |
539 | ||
540 | lp5521_write_program_memory(cl, LP5521_REG_R_PROG_MEM, | |
541 | ptn->r, ptn->size_r); | |
542 | lp5521_write_program_memory(cl, LP5521_REG_G_PROG_MEM, | |
543 | ptn->g, ptn->size_g); | |
544 | lp5521_write_program_memory(cl, LP5521_REG_B_PROG_MEM, | |
545 | ptn->b, ptn->size_b); | |
546 | ||
547 | lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_RUN); | |
548 | usleep_range(1000, 2000); | |
32a2f747 | 549 | lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM); |
011af7bc KM |
550 | } |
551 | } | |
552 | ||
553 | static ssize_t store_led_pattern(struct device *dev, | |
554 | struct device_attribute *attr, | |
555 | const char *buf, size_t len) | |
556 | { | |
557 | struct lp5521_chip *chip = i2c_get_clientdata(to_i2c_client(dev)); | |
558 | unsigned long val; | |
559 | int ret; | |
560 | ||
69b44c16 | 561 | ret = kstrtoul(buf, 16, &val); |
011af7bc KM |
562 | if (ret) |
563 | return ret; | |
564 | ||
565 | lp5521_run_led_pattern(val, chip); | |
566 | ||
567 | return len; | |
568 | } | |
569 | ||
500fe141 | 570 | static struct attribute_group lp5521_led_attribute_group = { |
500fe141 SO |
571 | }; |
572 | ||
573 | /* device attributes */ | |
67d1da79 | 574 | static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUSR, |
500fe141 | 575 | show_engine1_mode, store_engine1_mode); |
67d1da79 | 576 | static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUSR, |
500fe141 | 577 | show_engine2_mode, store_engine2_mode); |
67d1da79 | 578 | static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUSR, |
500fe141 | 579 | show_engine3_mode, store_engine3_mode); |
67d1da79 VK |
580 | static DEVICE_ATTR(engine1_load, S_IWUSR, NULL, store_engine1_load); |
581 | static DEVICE_ATTR(engine2_load, S_IWUSR, NULL, store_engine2_load); | |
582 | static DEVICE_ATTR(engine3_load, S_IWUSR, NULL, store_engine3_load); | |
500fe141 | 583 | static DEVICE_ATTR(selftest, S_IRUGO, lp5521_selftest, NULL); |
011af7bc | 584 | static DEVICE_ATTR(led_pattern, S_IWUSR, NULL, store_led_pattern); |
500fe141 SO |
585 | |
586 | static struct attribute *lp5521_attributes[] = { | |
587 | &dev_attr_engine1_mode.attr, | |
588 | &dev_attr_engine2_mode.attr, | |
589 | &dev_attr_engine3_mode.attr, | |
590 | &dev_attr_selftest.attr, | |
500fe141 | 591 | &dev_attr_engine1_load.attr, |
500fe141 | 592 | &dev_attr_engine2_load.attr, |
500fe141 | 593 | &dev_attr_engine3_load.attr, |
011af7bc | 594 | &dev_attr_led_pattern.attr, |
500fe141 SO |
595 | NULL |
596 | }; | |
597 | ||
598 | static const struct attribute_group lp5521_group = { | |
599 | .attrs = lp5521_attributes, | |
600 | }; | |
601 | ||
500fe141 SO |
602 | static int lp5521_register_sysfs(struct i2c_client *client) |
603 | { | |
604 | struct device *dev = &client->dev; | |
605 | return sysfs_create_group(&dev->kobj, &lp5521_group); | |
606 | } | |
607 | ||
608 | static void lp5521_unregister_sysfs(struct i2c_client *client) | |
609 | { | |
610 | struct lp5521_chip *chip = i2c_get_clientdata(client); | |
611 | struct device *dev = &client->dev; | |
612 | int i; | |
613 | ||
614 | sysfs_remove_group(&dev->kobj, &lp5521_group); | |
615 | ||
500fe141 SO |
616 | for (i = 0; i < chip->num_leds; i++) |
617 | sysfs_remove_group(&chip->leds[i].cdev.dev->kobj, | |
618 | &lp5521_led_attribute_group); | |
619 | } | |
620 | ||
1904f83d MWK |
621 | static void lp5521_unregister_leds(struct lp5521_chip *chip) |
622 | { | |
623 | int i; | |
624 | ||
625 | for (i = 0; i < chip->num_leds; i++) { | |
626 | led_classdev_unregister(&chip->leds[i].cdev); | |
627 | cancel_work_sync(&chip->leds[i].brightness_work); | |
628 | } | |
629 | } | |
630 | ||
48068d5d MWK |
631 | /* Chip specific configurations */ |
632 | static struct lp55xx_device_config lp5521_cfg = { | |
633 | .reset = { | |
634 | .addr = LP5521_REG_RESET, | |
635 | .val = LP5521_RESET, | |
636 | }, | |
e3a700d8 MWK |
637 | .enable = { |
638 | .addr = LP5521_REG_ENABLE, | |
639 | .val = LP5521_ENABLE_DEFAULT, | |
640 | }, | |
0e202346 | 641 | .max_channel = LP5521_MAX_LEDS, |
ffbdccdb | 642 | .post_init_device = lp5521_post_init_device, |
a6e4679a | 643 | .brightness_work_fn = lp5521_led_brightness_work, |
a96bfa13 | 644 | .set_led_current = lp5521_set_led_current, |
48068d5d MWK |
645 | }; |
646 | ||
98ea1ea2 | 647 | static int lp5521_probe(struct i2c_client *client, |
500fe141 SO |
648 | const struct i2c_device_id *id) |
649 | { | |
6a0c9a47 | 650 | struct lp5521_chip *old_chip = NULL; |
1904f83d | 651 | int ret; |
6a0c9a47 MWK |
652 | struct lp55xx_chip *chip; |
653 | struct lp55xx_led *led; | |
654 | struct lp55xx_platform_data *pdata = client->dev.platform_data; | |
500fe141 | 655 | |
6a0c9a47 | 656 | if (!pdata) { |
500fe141 | 657 | dev_err(&client->dev, "no platform data\n"); |
e430dc00 | 658 | return -EINVAL; |
500fe141 SO |
659 | } |
660 | ||
6a0c9a47 MWK |
661 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
662 | if (!chip) | |
663 | return -ENOMEM; | |
664 | ||
665 | led = devm_kzalloc(&client->dev, | |
666 | sizeof(*led) * pdata->num_channels, GFP_KERNEL); | |
667 | if (!led) | |
668 | return -ENOMEM; | |
669 | ||
670 | chip->cl = client; | |
671 | chip->pdata = pdata; | |
48068d5d | 672 | chip->cfg = &lp5521_cfg; |
6a0c9a47 MWK |
673 | |
674 | mutex_init(&chip->lock); | |
500fe141 | 675 | |
6a0c9a47 | 676 | i2c_set_clientdata(client, led); |
500fe141 | 677 | |
22ebeb48 | 678 | ret = lp55xx_init_device(chip); |
944f7b1d | 679 | if (ret) |
f6c64c6f | 680 | goto err_init; |
500fe141 SO |
681 | |
682 | dev_info(&client->dev, "%s programmable led chip found\n", id->name); | |
683 | ||
9e9b3db1 | 684 | ret = lp55xx_register_leds(led, chip); |
f6524808 | 685 | if (ret) |
9e9b3db1 | 686 | goto err_register_leds; |
500fe141 SO |
687 | |
688 | ret = lp5521_register_sysfs(client); | |
689 | if (ret) { | |
690 | dev_err(&client->dev, "registering sysfs failed\n"); | |
e430dc00 | 691 | goto fail2; |
500fe141 SO |
692 | } |
693 | return ret; | |
e430dc00 | 694 | fail2: |
945c7007 | 695 | lp5521_unregister_leds(old_chip); |
9e9b3db1 | 696 | err_register_leds: |
6ce61762 | 697 | lp55xx_deinit_device(chip); |
f6c64c6f | 698 | err_init: |
500fe141 SO |
699 | return ret; |
700 | } | |
701 | ||
678e8a6b | 702 | static int lp5521_remove(struct i2c_client *client) |
500fe141 | 703 | { |
945c7007 | 704 | struct lp5521_chip *old_chip = i2c_get_clientdata(client); |
6ce61762 MWK |
705 | struct lp55xx_led *led = i2c_get_clientdata(client); |
706 | struct lp55xx_chip *chip = led->chip; | |
500fe141 | 707 | |
945c7007 | 708 | lp5521_run_led_pattern(PATTERN_OFF, old_chip); |
500fe141 SO |
709 | lp5521_unregister_sysfs(client); |
710 | ||
945c7007 | 711 | lp5521_unregister_leds(old_chip); |
6ce61762 | 712 | lp55xx_deinit_device(chip); |
500fe141 | 713 | |
500fe141 SO |
714 | return 0; |
715 | } | |
716 | ||
717 | static const struct i2c_device_id lp5521_id[] = { | |
718 | { "lp5521", 0 }, /* Three channel chip */ | |
719 | { } | |
720 | }; | |
721 | MODULE_DEVICE_TABLE(i2c, lp5521_id); | |
722 | ||
723 | static struct i2c_driver lp5521_driver = { | |
724 | .driver = { | |
725 | .name = "lp5521", | |
726 | }, | |
727 | .probe = lp5521_probe, | |
df07cf81 | 728 | .remove = lp5521_remove, |
500fe141 SO |
729 | .id_table = lp5521_id, |
730 | }; | |
731 | ||
09a0d183 | 732 | module_i2c_driver(lp5521_driver); |
500fe141 SO |
733 | |
734 | MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo"); | |
735 | MODULE_DESCRIPTION("LP5521 LED engine"); | |
736 | MODULE_LICENSE("GPL v2"); |