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25#include <linux/delay.h>
26#include <linux/firmware.h>
27#include <linux/i2c.h>
28#include <linux/leds.h>
29#include <linux/module.h>
30#include <linux/mutex.h>
31#include <linux/of.h>
32#include <linux/platform_data/leds-lp55xx.h>
33#include <linux/slab.h>
34
35#include "leds-lp55xx-common.h"
36
37#define LP5523_PROGRAM_LENGTH 32
38
39
40
41
42
43
44
45
46#define LP5523_MAX_LEDS 9
47
48
49#define LP5523_REG_ENABLE 0x00
50#define LP5523_REG_OP_MODE 0x01
51#define LP5523_REG_ENABLE_LEDS_MSB 0x04
52#define LP5523_REG_ENABLE_LEDS_LSB 0x05
53#define LP5523_REG_LED_CTRL_BASE 0x06
54#define LP5523_REG_LED_PWM_BASE 0x16
55#define LP5523_REG_LED_CURRENT_BASE 0x26
56#define LP5523_REG_CONFIG 0x36
57#define LP5523_REG_STATUS 0x3A
58#define LP5523_REG_RESET 0x3D
59#define LP5523_REG_LED_TEST_CTRL 0x41
60#define LP5523_REG_LED_TEST_ADC 0x42
61#define LP5523_REG_MASTER_FADER_BASE 0x48
62#define LP5523_REG_CH1_PROG_START 0x4C
63#define LP5523_REG_CH2_PROG_START 0x4D
64#define LP5523_REG_CH3_PROG_START 0x4E
65#define LP5523_REG_PROG_PAGE_SEL 0x4F
66#define LP5523_REG_PROG_MEM 0x50
67
68
69#define LP5523_ENABLE 0x40
70#define LP5523_AUTO_INC 0x40
71#define LP5523_PWR_SAVE 0x20
72#define LP5523_PWM_PWR_SAVE 0x04
73#define LP5523_CP_AUTO 0x18
74#define LP5523_AUTO_CLK 0x02
75
76#define LP5523_EN_LEDTEST 0x80
77#define LP5523_LEDTEST_DONE 0x80
78#define LP5523_RESET 0xFF
79#define LP5523_ADC_SHORTCIRC_LIM 80
80#define LP5523_EXT_CLK_USED 0x08
81#define LP5523_ENG_STATUS_MASK 0x07
82
83#define LP5523_FADER_MAPPING_MASK 0xC0
84#define LP5523_FADER_MAPPING_SHIFT 6
85
86
87#define LP5523_PAGE_ENG1 0
88#define LP5523_PAGE_ENG2 1
89#define LP5523_PAGE_ENG3 2
90#define LP5523_PAGE_MUX1 3
91#define LP5523_PAGE_MUX2 4
92#define LP5523_PAGE_MUX3 5
93
94
95#define LP5523_MODE_ENG1_M 0x30
96#define LP5523_MODE_ENG2_M 0x0C
97#define LP5523_MODE_ENG3_M 0x03
98#define LP5523_LOAD_ENG1 0x10
99#define LP5523_LOAD_ENG2 0x04
100#define LP5523_LOAD_ENG3 0x01
101
102#define LP5523_ENG1_IS_LOADING(mode) \
103 ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
104#define LP5523_ENG2_IS_LOADING(mode) \
105 ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
106#define LP5523_ENG3_IS_LOADING(mode) \
107 ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
108
109#define LP5523_EXEC_ENG1_M 0x30
110#define LP5523_EXEC_ENG2_M 0x0C
111#define LP5523_EXEC_ENG3_M 0x03
112#define LP5523_EXEC_M 0x3F
113#define LP5523_RUN_ENG1 0x20
114#define LP5523_RUN_ENG2 0x08
115#define LP5523_RUN_ENG3 0x02
116
117#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
118
119enum lp5523_chip_id {
120 LP5523,
121 LP55231,
122};
123
124static int lp5523_init_program_engine(struct lp55xx_chip *chip);
125
126static inline void lp5523_wait_opmode_done(void)
127{
128 usleep_range(1000, 2000);
129}
130
131static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
132{
133 led->led_current = led_current;
134 lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
135 led_current);
136}
137
138static int lp5523_post_init_device(struct lp55xx_chip *chip)
139{
140 int ret;
141
142 ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
143 if (ret)
144 return ret;
145
146
147 usleep_range(1000, 2000);
148
149 ret = lp55xx_write(chip, LP5523_REG_CONFIG,
150 LP5523_AUTO_INC | LP5523_PWR_SAVE |
151 LP5523_CP_AUTO | LP5523_AUTO_CLK |
152 LP5523_PWM_PWR_SAVE);
153 if (ret)
154 return ret;
155
156
157 ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
158 if (ret)
159 return ret;
160
161 ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
162 if (ret)
163 return ret;
164
165 return lp5523_init_program_engine(chip);
166}
167
168static void lp5523_load_engine(struct lp55xx_chip *chip)
169{
170 enum lp55xx_engine_index idx = chip->engine_idx;
171 u8 mask[] = {
172 [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
173 [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
174 [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
175 };
176
177 u8 val[] = {
178 [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
179 [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
180 [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
181 };
182
183 lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
184
185 lp5523_wait_opmode_done();
186}
187
188static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip)
189{
190 enum lp55xx_engine_index idx = chip->engine_idx;
191 u8 page_sel[] = {
192 [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
193 [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
194 [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
195 };
196
197 lp5523_load_engine(chip);
198
199 lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
200}
201
202static void lp5523_stop_all_engines(struct lp55xx_chip *chip)
203{
204 lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
205 lp5523_wait_opmode_done();
206}
207
208static void lp5523_stop_engine(struct lp55xx_chip *chip)
209{
210 enum lp55xx_engine_index idx = chip->engine_idx;
211 u8 mask[] = {
212 [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
213 [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
214 [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
215 };
216
217 lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0);
218
219 lp5523_wait_opmode_done();
220}
221
222static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
223{
224 int i;
225
226 for (i = 0; i < LP5523_MAX_LEDS; i++)
227 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
228}
229
230static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
231{
232 int ret;
233 u8 mode;
234 u8 exec;
235
236
237 if (!start) {
238 lp5523_stop_engine(chip);
239 lp5523_turn_off_channels(chip);
240 return;
241 }
242
243
244
245
246
247
248 ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
249 if (ret)
250 return;
251
252 ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
253 if (ret)
254 return;
255
256
257 if (LP5523_ENG1_IS_LOADING(mode)) {
258 mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
259 exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
260 }
261
262 if (LP5523_ENG2_IS_LOADING(mode)) {
263 mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
264 exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
265 }
266
267 if (LP5523_ENG3_IS_LOADING(mode)) {
268 mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
269 exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
270 }
271
272 lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
273 lp5523_wait_opmode_done();
274
275 lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
276}
277
278static int lp5523_init_program_engine(struct lp55xx_chip *chip)
279{
280 int i;
281 int j;
282 int ret;
283 u8 status;
284
285 static const u8 pattern[][LP5523_PROGRAM_LENGTH] = {
286 { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
287 { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
288 { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
289 };
290
291
292 ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00);
293 if (ret)
294 return ret;
295
296 ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10);
297 if (ret)
298 return ret;
299
300 ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20);
301 if (ret)
302 return ret;
303
304
305 for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
306 chip->engine_idx = i;
307 lp5523_load_engine_and_select_page(chip);
308
309 for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) {
310 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j,
311 pattern[i - 1][j]);
312 if (ret)
313 goto out;
314 }
315 }
316
317 lp5523_run_engine(chip, true);
318
319
320 usleep_range(3000, 6000);
321 lp55xx_read(chip, LP5523_REG_STATUS, &status);
322 status &= LP5523_ENG_STATUS_MASK;
323
324 if (status != LP5523_ENG_STATUS_MASK) {
325 dev_err(&chip->cl->dev,
326 "cound not configure LED engine, status = 0x%.2x\n",
327 status);
328 ret = -1;
329 }
330
331out:
332 lp5523_stop_all_engines(chip);
333 return ret;
334}
335
336static int lp5523_update_program_memory(struct lp55xx_chip *chip,
337 const u8 *data, size_t size)
338{
339 u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
340 unsigned cmd;
341 char c[3];
342 int nrchars;
343 int ret;
344 int offset = 0;
345 int i = 0;
346
347 while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
348
349 ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
350 if (ret != 1)
351 goto err;
352
353 ret = sscanf(c, "%2x", &cmd);
354 if (ret != 1)
355 goto err;
356
357 pattern[i] = (u8)cmd;
358 offset += nrchars;
359 i++;
360 }
361
362
363 if (i % 2)
364 goto err;
365
366 for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) {
367 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
368 if (ret)
369 return -EINVAL;
370 }
371
372 return size;
373
374err:
375 dev_err(&chip->cl->dev, "wrong pattern format\n");
376 return -EINVAL;
377}
378
379static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
380{
381 const struct firmware *fw = chip->fw;
382
383 if (fw->size > LP5523_PROGRAM_LENGTH) {
384 dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
385 fw->size);
386 return;
387 }
388
389
390
391
392
393
394
395 lp5523_load_engine_and_select_page(chip);
396 lp5523_update_program_memory(chip, fw->data, fw->size);
397}
398
399static ssize_t show_engine_mode(struct device *dev,
400 struct device_attribute *attr,
401 char *buf, int nr)
402{
403 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
404 struct lp55xx_chip *chip = led->chip;
405 enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode;
406
407 switch (mode) {
408 case LP55XX_ENGINE_RUN:
409 return sprintf(buf, "run\n");
410 case LP55XX_ENGINE_LOAD:
411 return sprintf(buf, "load\n");
412 case LP55XX_ENGINE_DISABLED:
413 default:
414 return sprintf(buf, "disabled\n");
415 }
416}
417show_mode(1)
418show_mode(2)
419show_mode(3)
420
421static ssize_t store_engine_mode(struct device *dev,
422 struct device_attribute *attr,
423 const char *buf, size_t len, int nr)
424{
425 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
426 struct lp55xx_chip *chip = led->chip;
427 struct lp55xx_engine *engine = &chip->engines[nr - 1];
428
429 mutex_lock(&chip->lock);
430
431 chip->engine_idx = nr;
432
433 if (!strncmp(buf, "run", 3)) {
434 lp5523_run_engine(chip, true);
435 engine->mode = LP55XX_ENGINE_RUN;
436 } else if (!strncmp(buf, "load", 4)) {
437 lp5523_stop_engine(chip);
438 lp5523_load_engine(chip);
439 engine->mode = LP55XX_ENGINE_LOAD;
440 } else if (!strncmp(buf, "disabled", 8)) {
441 lp5523_stop_engine(chip);
442 engine->mode = LP55XX_ENGINE_DISABLED;
443 }
444
445 mutex_unlock(&chip->lock);
446
447 return len;
448}
449store_mode(1)
450store_mode(2)
451store_mode(3)
452
453static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
454{
455 u16 tmp_mux = 0;
456 int i;
457
458 len = min_t(int, len, LP5523_MAX_LEDS);
459
460 for (i = 0; i < len; i++) {
461 switch (buf[i]) {
462 case '1':
463 tmp_mux |= (1 << i);
464 break;
465 case '0':
466 break;
467 case '\n':
468 i = len;
469 break;
470 default:
471 return -1;
472 }
473 }
474 *mux = tmp_mux;
475
476 return 0;
477}
478
479static void lp5523_mux_to_array(u16 led_mux, char *array)
480{
481 int i, pos = 0;
482 for (i = 0; i < LP5523_MAX_LEDS; i++)
483 pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
484
485 array[pos] = '\0';
486}
487
488static ssize_t show_engine_leds(struct device *dev,
489 struct device_attribute *attr,
490 char *buf, int nr)
491{
492 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
493 struct lp55xx_chip *chip = led->chip;
494 char mux[LP5523_MAX_LEDS + 1];
495
496 lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
497
498 return sprintf(buf, "%s\n", mux);
499}
500show_leds(1)
501show_leds(2)
502show_leds(3)
503
504static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
505{
506 struct lp55xx_engine *engine = &chip->engines[nr - 1];
507 int ret;
508 u8 mux_page[] = {
509 [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1,
510 [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2,
511 [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3,
512 };
513
514 lp5523_load_engine(chip);
515
516 ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]);
517 if (ret)
518 return ret;
519
520 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8));
521 if (ret)
522 return ret;
523
524 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux));
525 if (ret)
526 return ret;
527
528 engine->led_mux = mux;
529 return 0;
530}
531
532static ssize_t store_engine_leds(struct device *dev,
533 struct device_attribute *attr,
534 const char *buf, size_t len, int nr)
535{
536 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
537 struct lp55xx_chip *chip = led->chip;
538 struct lp55xx_engine *engine = &chip->engines[nr - 1];
539 u16 mux = 0;
540 ssize_t ret;
541
542 if (lp5523_mux_parse(buf, &mux, len))
543 return -EINVAL;
544
545 mutex_lock(&chip->lock);
546
547 chip->engine_idx = nr;
548 ret = -EINVAL;
549
550 if (engine->mode != LP55XX_ENGINE_LOAD)
551 goto leave;
552
553 if (lp5523_load_mux(chip, mux, nr))
554 goto leave;
555
556 ret = len;
557leave:
558 mutex_unlock(&chip->lock);
559 return ret;
560}
561store_leds(1)
562store_leds(2)
563store_leds(3)
564
565static ssize_t store_engine_load(struct device *dev,
566 struct device_attribute *attr,
567 const char *buf, size_t len, int nr)
568{
569 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
570 struct lp55xx_chip *chip = led->chip;
571 int ret;
572
573 mutex_lock(&chip->lock);
574
575 chip->engine_idx = nr;
576 lp5523_load_engine_and_select_page(chip);
577 ret = lp5523_update_program_memory(chip, buf, len);
578
579 mutex_unlock(&chip->lock);
580
581 return ret;
582}
583store_load(1)
584store_load(2)
585store_load(3)
586
587static ssize_t lp5523_selftest(struct device *dev,
588 struct device_attribute *attr,
589 char *buf)
590{
591 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
592 struct lp55xx_chip *chip = led->chip;
593 struct lp55xx_platform_data *pdata = chip->pdata;
594 int i, ret, pos = 0;
595 u8 status, adc, vdd;
596
597 mutex_lock(&chip->lock);
598
599 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
600 if (ret < 0)
601 goto fail;
602
603
604 if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
605 if ((status & LP5523_EXT_CLK_USED) == 0)
606 goto fail;
607 }
608
609
610 lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
611 usleep_range(3000, 6000);
612 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
613 if (ret < 0)
614 goto fail;
615
616 if (!(status & LP5523_LEDTEST_DONE))
617 usleep_range(3000, 6000);
618
619 ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
620 if (ret < 0)
621 goto fail;
622
623 vdd--;
624
625 for (i = 0; i < LP5523_MAX_LEDS; i++) {
626
627 if (pdata->led_config[i].led_current == 0)
628 continue;
629
630
631 lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
632 pdata->led_config[i].led_current);
633
634 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff);
635
636 usleep_range(2000, 4000);
637 lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
638 LP5523_EN_LEDTEST | i);
639
640 usleep_range(3000, 6000);
641 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
642 if (ret < 0)
643 goto fail;
644
645 if (!(status & LP5523_LEDTEST_DONE))
646 usleep_range(3000, 6000);
647
648 ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
649 if (ret < 0)
650 goto fail;
651
652 if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
653 pos += sprintf(buf + pos, "LED %d FAIL\n", i);
654
655 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00);
656
657
658 lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
659 led->led_current);
660 led++;
661 }
662 if (pos == 0)
663 pos = sprintf(buf, "OK\n");
664 goto release_lock;
665fail:
666 pos = sprintf(buf, "FAIL\n");
667
668release_lock:
669 mutex_unlock(&chip->lock);
670
671 return pos;
672}
673
674#define show_fader(nr) \
675static ssize_t show_master_fader##nr(struct device *dev, \
676 struct device_attribute *attr, \
677 char *buf) \
678{ \
679 return show_master_fader(dev, attr, buf, nr); \
680}
681
682#define store_fader(nr) \
683static ssize_t store_master_fader##nr(struct device *dev, \
684 struct device_attribute *attr, \
685 const char *buf, size_t len) \
686{ \
687 return store_master_fader(dev, attr, buf, len, nr); \
688}
689
690static ssize_t show_master_fader(struct device *dev,
691 struct device_attribute *attr,
692 char *buf, int nr)
693{
694 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
695 struct lp55xx_chip *chip = led->chip;
696 int ret;
697 u8 val;
698
699 mutex_lock(&chip->lock);
700 ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val);
701 mutex_unlock(&chip->lock);
702
703 if (ret == 0)
704 ret = sprintf(buf, "%u\n", val);
705
706 return ret;
707}
708show_fader(1)
709show_fader(2)
710show_fader(3)
711
712static ssize_t store_master_fader(struct device *dev,
713 struct device_attribute *attr,
714 const char *buf, size_t len, int nr)
715{
716 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
717 struct lp55xx_chip *chip = led->chip;
718 int ret;
719 unsigned long val;
720
721 if (kstrtoul(buf, 0, &val))
722 return -EINVAL;
723
724 if (val > 0xff)
725 return -EINVAL;
726
727 mutex_lock(&chip->lock);
728 ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1,
729 (u8)val);
730 mutex_unlock(&chip->lock);
731
732 if (ret == 0)
733 ret = len;
734
735 return ret;
736}
737store_fader(1)
738store_fader(2)
739store_fader(3)
740
741static ssize_t show_master_fader_leds(struct device *dev,
742 struct device_attribute *attr,
743 char *buf)
744{
745 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
746 struct lp55xx_chip *chip = led->chip;
747 int i, ret, pos = 0;
748 u8 val;
749
750 mutex_lock(&chip->lock);
751
752 for (i = 0; i < LP5523_MAX_LEDS; i++) {
753 ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val);
754 if (ret)
755 goto leave;
756
757 val = (val & LP5523_FADER_MAPPING_MASK)
758 >> LP5523_FADER_MAPPING_SHIFT;
759 if (val > 3) {
760 ret = -EINVAL;
761 goto leave;
762 }
763 buf[pos++] = val + '0';
764 }
765 buf[pos++] = '\n';
766 ret = pos;
767leave:
768 mutex_unlock(&chip->lock);
769 return ret;
770}
771
772static ssize_t store_master_fader_leds(struct device *dev,
773 struct device_attribute *attr,
774 const char *buf, size_t len)
775{
776 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
777 struct lp55xx_chip *chip = led->chip;
778 int i, n, ret;
779 u8 val;
780
781 n = min_t(int, len, LP5523_MAX_LEDS);
782
783 mutex_lock(&chip->lock);
784
785 for (i = 0; i < n; i++) {
786 if (buf[i] >= '0' && buf[i] <= '3') {
787 val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT;
788 ret = lp55xx_update_bits(chip,
789 LP5523_REG_LED_CTRL_BASE + i,
790 LP5523_FADER_MAPPING_MASK,
791 val);
792 if (ret)
793 goto leave;
794 } else {
795 ret = -EINVAL;
796 goto leave;
797 }
798 }
799 ret = len;
800leave:
801 mutex_unlock(&chip->lock);
802 return ret;
803}
804
805static int lp5523_led_brightness(struct lp55xx_led *led)
806{
807 struct lp55xx_chip *chip = led->chip;
808 int ret;
809
810 mutex_lock(&chip->lock);
811 ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
812 led->brightness);
813 mutex_unlock(&chip->lock);
814 return ret;
815}
816
817static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode);
818static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode);
819static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode);
820static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds);
821static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds);
822static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds);
823static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load);
824static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load);
825static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load);
826static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest);
827static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1,
828 store_master_fader1);
829static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2,
830 store_master_fader2);
831static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3,
832 store_master_fader3);
833static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds,
834 store_master_fader_leds);
835
836static struct attribute *lp5523_attributes[] = {
837 &dev_attr_engine1_mode.attr,
838 &dev_attr_engine2_mode.attr,
839 &dev_attr_engine3_mode.attr,
840 &dev_attr_engine1_load.attr,
841 &dev_attr_engine2_load.attr,
842 &dev_attr_engine3_load.attr,
843 &dev_attr_engine1_leds.attr,
844 &dev_attr_engine2_leds.attr,
845 &dev_attr_engine3_leds.attr,
846 &dev_attr_selftest.attr,
847 &dev_attr_master_fader1.attr,
848 &dev_attr_master_fader2.attr,
849 &dev_attr_master_fader3.attr,
850 &dev_attr_master_fader_leds.attr,
851 NULL,
852};
853
854static const struct attribute_group lp5523_group = {
855 .attrs = lp5523_attributes,
856};
857
858
859static struct lp55xx_device_config lp5523_cfg = {
860 .reset = {
861 .addr = LP5523_REG_RESET,
862 .val = LP5523_RESET,
863 },
864 .enable = {
865 .addr = LP5523_REG_ENABLE,
866 .val = LP5523_ENABLE,
867 },
868 .max_channel = LP5523_MAX_LEDS,
869 .post_init_device = lp5523_post_init_device,
870 .brightness_fn = lp5523_led_brightness,
871 .set_led_current = lp5523_set_led_current,
872 .firmware_cb = lp5523_firmware_loaded,
873 .run_engine = lp5523_run_engine,
874 .dev_attr_group = &lp5523_group,
875};
876
877static int lp5523_probe(struct i2c_client *client,
878 const struct i2c_device_id *id)
879{
880 int ret;
881 struct lp55xx_chip *chip;
882 struct lp55xx_led *led;
883 struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
884 struct device_node *np = client->dev.of_node;
885
886 if (!pdata) {
887 if (np) {
888 pdata = lp55xx_of_populate_pdata(&client->dev, np);
889 if (IS_ERR(pdata))
890 return PTR_ERR(pdata);
891 } else {
892 dev_err(&client->dev, "no platform data\n");
893 return -EINVAL;
894 }
895 }
896
897 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
898 if (!chip)
899 return -ENOMEM;
900
901 led = devm_kzalloc(&client->dev,
902 sizeof(*led) * pdata->num_channels, GFP_KERNEL);
903 if (!led)
904 return -ENOMEM;
905
906 chip->cl = client;
907 chip->pdata = pdata;
908 chip->cfg = &lp5523_cfg;
909
910 mutex_init(&chip->lock);
911
912 i2c_set_clientdata(client, led);
913
914 ret = lp55xx_init_device(chip);
915 if (ret)
916 goto err_init;
917
918 dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
919
920 ret = lp55xx_register_leds(led, chip);
921 if (ret)
922 goto err_register_leds;
923
924 ret = lp55xx_register_sysfs(chip);
925 if (ret) {
926 dev_err(&client->dev, "registering sysfs failed\n");
927 goto err_register_sysfs;
928 }
929
930 return 0;
931
932err_register_sysfs:
933 lp55xx_unregister_leds(led, chip);
934err_register_leds:
935 lp55xx_deinit_device(chip);
936err_init:
937 return ret;
938}
939
940static int lp5523_remove(struct i2c_client *client)
941{
942 struct lp55xx_led *led = i2c_get_clientdata(client);
943 struct lp55xx_chip *chip = led->chip;
944
945 lp5523_stop_all_engines(chip);
946 lp55xx_unregister_sysfs(chip);
947 lp55xx_unregister_leds(led, chip);
948 lp55xx_deinit_device(chip);
949
950 return 0;
951}
952
953static const struct i2c_device_id lp5523_id[] = {
954 { "lp5523", LP5523 },
955 { "lp55231", LP55231 },
956 { }
957};
958
959MODULE_DEVICE_TABLE(i2c, lp5523_id);
960
961#ifdef CONFIG_OF
962static const struct of_device_id of_lp5523_leds_match[] = {
963 { .compatible = "national,lp5523", },
964 { .compatible = "ti,lp55231", },
965 {},
966};
967
968MODULE_DEVICE_TABLE(of, of_lp5523_leds_match);
969#endif
970
971static struct i2c_driver lp5523_driver = {
972 .driver = {
973 .name = "lp5523x",
974 .of_match_table = of_match_ptr(of_lp5523_leds_match),
975 },
976 .probe = lp5523_probe,
977 .remove = lp5523_remove,
978 .id_table = lp5523_id,
979};
980
981module_i2c_driver(lp5523_driver);
982
983MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
984MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
985MODULE_DESCRIPTION("LP5523 LED engine");
986MODULE_LICENSE("GPL");
987
