Commit | Line | Data |
---|---|---|
0efba16c SO |
1 | /* |
2 | * lp5523.c - LP5523 LED Driver | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
a2387cb9 | 5 | * Copyright (C) 2012 Texas Instruments |
0efba16c SO |
6 | * |
7 | * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> | |
a2387cb9 | 8 | * Milo(Woogyom) Kim <milo.kim@ti.com> |
0efba16c SO |
9 | * |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * version 2 as published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
22 | * 02110-1301 USA | |
23 | */ | |
24 | ||
0efba16c | 25 | #include <linux/delay.h> |
79bcc10b MWK |
26 | #include <linux/firmware.h> |
27 | #include <linux/i2c.h> | |
28 | #include <linux/init.h> | |
0efba16c | 29 | #include <linux/leds.h> |
79bcc10b MWK |
30 | #include <linux/module.h> |
31 | #include <linux/mutex.h> | |
6a0c9a47 | 32 | #include <linux/platform_data/leds-lp55xx.h> |
79bcc10b | 33 | #include <linux/slab.h> |
6a0c9a47 MWK |
34 | |
35 | #include "leds-lp55xx-common.h" | |
0efba16c | 36 | |
12f022d2 MWK |
37 | #define LP5523_PROGRAM_LENGTH 32 |
38 | #define LP5523_MAX_LEDS 9 | |
39 | ||
40 | /* Registers */ | |
0efba16c SO |
41 | #define LP5523_REG_ENABLE 0x00 |
42 | #define LP5523_REG_OP_MODE 0x01 | |
0efba16c SO |
43 | #define LP5523_REG_ENABLE_LEDS_MSB 0x04 |
44 | #define LP5523_REG_ENABLE_LEDS_LSB 0x05 | |
0efba16c SO |
45 | #define LP5523_REG_LED_PWM_BASE 0x16 |
46 | #define LP5523_REG_LED_CURRENT_BASE 0x26 | |
47 | #define LP5523_REG_CONFIG 0x36 | |
12f022d2 MWK |
48 | #define LP5523_REG_STATUS 0x3A |
49 | #define LP5523_REG_RESET 0x3D | |
0efba16c SO |
50 | #define LP5523_REG_LED_TEST_CTRL 0x41 |
51 | #define LP5523_REG_LED_TEST_ADC 0x42 | |
22460438 MK |
52 | #define LP5523_REG_CH1_PROG_START 0x4C |
53 | #define LP5523_REG_CH2_PROG_START 0x4D | |
54 | #define LP5523_REG_CH3_PROG_START 0x4E | |
12f022d2 | 55 | #define LP5523_REG_PROG_PAGE_SEL 0x4F |
0efba16c SO |
56 | #define LP5523_REG_PROG_MEM 0x50 |
57 | ||
12f022d2 | 58 | /* Bit description in registers */ |
0efba16c SO |
59 | #define LP5523_ENABLE 0x40 |
60 | #define LP5523_AUTO_INC 0x40 | |
61 | #define LP5523_PWR_SAVE 0x20 | |
62 | #define LP5523_PWM_PWR_SAVE 0x04 | |
0efba16c | 63 | #define LP5523_CP_AUTO 0x18 |
0efba16c | 64 | #define LP5523_AUTO_CLK 0x02 |
12f022d2 | 65 | |
0efba16c SO |
66 | #define LP5523_EN_LEDTEST 0x80 |
67 | #define LP5523_LEDTEST_DONE 0x80 | |
48068d5d | 68 | #define LP5523_RESET 0xFF |
0efba16c | 69 | #define LP5523_ADC_SHORTCIRC_LIM 80 |
0efba16c | 70 | #define LP5523_EXT_CLK_USED 0x08 |
22460438 | 71 | #define LP5523_ENG_STATUS_MASK 0x07 |
0efba16c | 72 | |
db6eaf83 MWK |
73 | /* Memory Page Selection */ |
74 | #define LP5523_PAGE_ENG1 0 | |
75 | #define LP5523_PAGE_ENG2 1 | |
76 | #define LP5523_PAGE_ENG3 2 | |
45e611bf MK |
77 | #define LP5523_PAGE_MUX1 3 |
78 | #define LP5523_PAGE_MUX2 4 | |
79 | #define LP5523_PAGE_MUX3 5 | |
db6eaf83 MWK |
80 | |
81 | /* Program Memory Operations */ | |
82 | #define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */ | |
83 | #define LP5523_MODE_ENG2_M 0x0C | |
84 | #define LP5523_MODE_ENG3_M 0x03 | |
85 | #define LP5523_LOAD_ENG1 0x10 | |
86 | #define LP5523_LOAD_ENG2 0x04 | |
87 | #define LP5523_LOAD_ENG3 0x01 | |
88 | ||
89 | #define LP5523_ENG1_IS_LOADING(mode) \ | |
90 | ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1) | |
91 | #define LP5523_ENG2_IS_LOADING(mode) \ | |
92 | ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2) | |
93 | #define LP5523_ENG3_IS_LOADING(mode) \ | |
94 | ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3) | |
95 | ||
96 | #define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */ | |
97 | #define LP5523_EXEC_ENG2_M 0x0C | |
98 | #define LP5523_EXEC_ENG3_M 0x03 | |
99 | #define LP5523_EXEC_M 0x3F | |
100 | #define LP5523_RUN_ENG1 0x20 | |
101 | #define LP5523_RUN_ENG2 0x08 | |
102 | #define LP5523_RUN_ENG3 0x02 | |
103 | ||
45e611bf MK |
104 | #define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led))) |
105 | ||
27d7704e KM |
106 | enum lp5523_chip_id { |
107 | LP5523, | |
108 | LP55231, | |
109 | }; | |
110 | ||
22460438 MK |
111 | static int lp5523_init_program_engine(struct lp55xx_chip *chip); |
112 | ||
db6eaf83 MWK |
113 | static inline void lp5523_wait_opmode_done(void) |
114 | { | |
115 | usleep_range(1000, 2000); | |
116 | } | |
117 | ||
a96bfa13 MWK |
118 | static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) |
119 | { | |
120 | led->led_current = led_current; | |
121 | lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, | |
122 | led_current); | |
123 | } | |
124 | ||
ffbdccdb | 125 | static int lp5523_post_init_device(struct lp55xx_chip *chip) |
0efba16c | 126 | { |
ffbdccdb | 127 | int ret; |
0efba16c | 128 | |
ffbdccdb | 129 | ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE); |
632418bf MWK |
130 | if (ret) |
131 | return ret; | |
0efba16c | 132 | |
2e4840ed SO |
133 | /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ |
134 | usleep_range(1000, 2000); | |
0efba16c | 135 | |
ffbdccdb | 136 | ret = lp55xx_write(chip, LP5523_REG_CONFIG, |
0efba16c SO |
137 | LP5523_AUTO_INC | LP5523_PWR_SAVE | |
138 | LP5523_CP_AUTO | LP5523_AUTO_CLK | | |
139 | LP5523_PWM_PWR_SAVE); | |
632418bf MWK |
140 | if (ret) |
141 | return ret; | |
0efba16c SO |
142 | |
143 | /* turn on all leds */ | |
ffbdccdb | 144 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01); |
632418bf | 145 | if (ret) |
1b21ec5a JH |
146 | return ret; |
147 | ||
22460438 MK |
148 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff); |
149 | if (ret) | |
150 | return ret; | |
151 | ||
152 | return lp5523_init_program_engine(chip); | |
0efba16c SO |
153 | } |
154 | ||
db6eaf83 | 155 | static void lp5523_load_engine(struct lp55xx_chip *chip) |
0efba16c | 156 | { |
db6eaf83 MWK |
157 | enum lp55xx_engine_index idx = chip->engine_idx; |
158 | u8 mask[] = { | |
159 | [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, | |
160 | [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, | |
161 | [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, | |
162 | }; | |
163 | ||
164 | u8 val[] = { | |
165 | [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1, | |
166 | [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2, | |
167 | [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3, | |
168 | }; | |
169 | ||
b9e1730b MK |
170 | lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]); |
171 | ||
172 | lp5523_wait_opmode_done(); | |
173 | } | |
174 | ||
175 | static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip) | |
176 | { | |
177 | enum lp55xx_engine_index idx = chip->engine_idx; | |
db6eaf83 MWK |
178 | u8 page_sel[] = { |
179 | [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1, | |
180 | [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2, | |
181 | [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3, | |
182 | }; | |
183 | ||
b9e1730b | 184 | lp5523_load_engine(chip); |
db6eaf83 MWK |
185 | |
186 | lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); | |
0efba16c SO |
187 | } |
188 | ||
db6eaf83 | 189 | static void lp5523_stop_engine(struct lp55xx_chip *chip) |
0efba16c | 190 | { |
db6eaf83 MWK |
191 | lp55xx_write(chip, LP5523_REG_OP_MODE, 0); |
192 | lp5523_wait_opmode_done(); | |
193 | } | |
0efba16c | 194 | |
db6eaf83 MWK |
195 | static void lp5523_turn_off_channels(struct lp55xx_chip *chip) |
196 | { | |
197 | int i; | |
0efba16c | 198 | |
db6eaf83 MWK |
199 | for (i = 0; i < LP5523_MAX_LEDS; i++) |
200 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0); | |
0efba16c SO |
201 | } |
202 | ||
db6eaf83 | 203 | static void lp5523_run_engine(struct lp55xx_chip *chip, bool start) |
0efba16c | 204 | { |
db6eaf83 MWK |
205 | int ret; |
206 | u8 mode; | |
207 | u8 exec; | |
0efba16c | 208 | |
db6eaf83 MWK |
209 | /* stop engine */ |
210 | if (!start) { | |
211 | lp5523_stop_engine(chip); | |
212 | lp5523_turn_off_channels(chip); | |
213 | return; | |
214 | } | |
0efba16c | 215 | |
db6eaf83 MWK |
216 | /* |
217 | * To run the engine, | |
218 | * operation mode and enable register should updated at the same time | |
219 | */ | |
0efba16c | 220 | |
db6eaf83 MWK |
221 | ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode); |
222 | if (ret) | |
223 | return; | |
0efba16c | 224 | |
db6eaf83 MWK |
225 | ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec); |
226 | if (ret) | |
227 | return; | |
0efba16c | 228 | |
db6eaf83 MWK |
229 | /* change operation mode to RUN only when each engine is loading */ |
230 | if (LP5523_ENG1_IS_LOADING(mode)) { | |
231 | mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1; | |
232 | exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1; | |
233 | } | |
0efba16c | 234 | |
db6eaf83 MWK |
235 | if (LP5523_ENG2_IS_LOADING(mode)) { |
236 | mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2; | |
237 | exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2; | |
238 | } | |
0efba16c | 239 | |
db6eaf83 MWK |
240 | if (LP5523_ENG3_IS_LOADING(mode)) { |
241 | mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3; | |
242 | exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3; | |
243 | } | |
244 | ||
245 | lp55xx_write(chip, LP5523_REG_OP_MODE, mode); | |
246 | lp5523_wait_opmode_done(); | |
247 | ||
248 | lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec); | |
0efba16c SO |
249 | } |
250 | ||
22460438 MK |
251 | static int lp5523_init_program_engine(struct lp55xx_chip *chip) |
252 | { | |
253 | int i; | |
254 | int j; | |
255 | int ret; | |
256 | u8 status; | |
257 | /* one pattern per engine setting LED MUX start and stop addresses */ | |
258 | static const u8 pattern[][LP5523_PROGRAM_LENGTH] = { | |
259 | { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
260 | { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
261 | { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
262 | }; | |
263 | ||
264 | /* hardcode 32 bytes of memory for each engine from program memory */ | |
265 | ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00); | |
266 | if (ret) | |
267 | return ret; | |
268 | ||
269 | ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10); | |
270 | if (ret) | |
271 | return ret; | |
272 | ||
273 | ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20); | |
274 | if (ret) | |
275 | return ret; | |
276 | ||
277 | /* write LED MUX address space for each engine */ | |
278 | for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { | |
279 | chip->engine_idx = i; | |
280 | lp5523_load_engine_and_select_page(chip); | |
281 | ||
282 | for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) { | |
283 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j, | |
284 | pattern[i - 1][j]); | |
285 | if (ret) | |
286 | goto out; | |
287 | } | |
288 | } | |
289 | ||
290 | lp5523_run_engine(chip, true); | |
291 | ||
292 | /* Let the programs run for couple of ms and check the engine status */ | |
293 | usleep_range(3000, 6000); | |
294 | lp55xx_read(chip, LP5523_REG_STATUS, &status); | |
295 | status &= LP5523_ENG_STATUS_MASK; | |
296 | ||
297 | if (status != LP5523_ENG_STATUS_MASK) { | |
298 | dev_err(&chip->cl->dev, | |
299 | "cound not configure LED engine, status = 0x%.2x\n", | |
300 | status); | |
301 | ret = -1; | |
302 | } | |
303 | ||
304 | out: | |
305 | lp5523_stop_engine(chip); | |
306 | return ret; | |
307 | } | |
308 | ||
db6eaf83 MWK |
309 | static int lp5523_update_program_memory(struct lp55xx_chip *chip, |
310 | const u8 *data, size_t size) | |
0efba16c | 311 | { |
db6eaf83 MWK |
312 | u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; |
313 | unsigned cmd; | |
314 | char c[3]; | |
315 | int update_size; | |
316 | int nrchars; | |
317 | int offset = 0; | |
318 | int ret; | |
0efba16c | 319 | int i; |
0efba16c | 320 | |
db6eaf83 MWK |
321 | /* clear program memory before updating */ |
322 | for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) | |
323 | lp55xx_write(chip, LP5523_REG_PROG_MEM + i, 0); | |
0efba16c | 324 | |
db6eaf83 MWK |
325 | i = 0; |
326 | while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) { | |
327 | /* separate sscanfs because length is working only for %s */ | |
328 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); | |
329 | if (ret != 1) | |
330 | goto err; | |
0efba16c | 331 | |
db6eaf83 MWK |
332 | ret = sscanf(c, "%2x", &cmd); |
333 | if (ret != 1) | |
334 | goto err; | |
0efba16c | 335 | |
db6eaf83 MWK |
336 | pattern[i] = (u8)cmd; |
337 | offset += nrchars; | |
338 | i++; | |
339 | } | |
0efba16c | 340 | |
db6eaf83 MWK |
341 | /* Each instruction is 16bit long. Check that length is even */ |
342 | if (i % 2) | |
343 | goto err; | |
0efba16c | 344 | |
db6eaf83 | 345 | update_size = i; |
0efba16c | 346 | |
45e611bf MK |
347 | mutex_lock(&chip->lock); |
348 | ||
349 | for (i = 0; i < update_size; i++) { | |
350 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); | |
351 | if (ret) { | |
352 | mutex_unlock(&chip->lock); | |
353 | return -EINVAL; | |
354 | } | |
355 | } | |
356 | ||
357 | mutex_unlock(&chip->lock); | |
358 | ||
359 | return size; | |
0efba16c | 360 | |
db6eaf83 MWK |
361 | err: |
362 | dev_err(&chip->cl->dev, "wrong pattern format\n"); | |
363 | return -EINVAL; | |
0efba16c | 364 | } |
0efba16c | 365 | |
db6eaf83 | 366 | static void lp5523_firmware_loaded(struct lp55xx_chip *chip) |
0efba16c | 367 | { |
db6eaf83 | 368 | const struct firmware *fw = chip->fw; |
fbac0812 | 369 | |
db6eaf83 MWK |
370 | if (fw->size > LP5523_PROGRAM_LENGTH) { |
371 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", | |
372 | fw->size); | |
373 | return; | |
374 | } | |
0efba16c | 375 | |
db6eaf83 MWK |
376 | /* |
377 | * Program momery sequence | |
378 | * 1) set engine mode to "LOAD" | |
379 | * 2) write firmware data into program memory | |
380 | */ | |
0efba16c | 381 | |
b9e1730b | 382 | lp5523_load_engine_and_select_page(chip); |
db6eaf83 | 383 | lp5523_update_program_memory(chip, fw->data, fw->size); |
0efba16c | 384 | } |
0efba16c | 385 | |
45e611bf MK |
386 | static ssize_t show_engine_mode(struct device *dev, |
387 | struct device_attribute *attr, | |
388 | char *buf, int nr) | |
389 | { | |
390 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
391 | struct lp55xx_chip *chip = led->chip; | |
392 | enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode; | |
393 | ||
394 | switch (mode) { | |
395 | case LP55XX_ENGINE_RUN: | |
396 | return sprintf(buf, "run\n"); | |
397 | case LP55XX_ENGINE_LOAD: | |
398 | return sprintf(buf, "load\n"); | |
399 | case LP55XX_ENGINE_DISABLED: | |
400 | default: | |
401 | return sprintf(buf, "disabled\n"); | |
402 | } | |
403 | } | |
404 | show_mode(1) | |
405 | show_mode(2) | |
406 | show_mode(3) | |
407 | ||
408 | static ssize_t store_engine_mode(struct device *dev, | |
409 | struct device_attribute *attr, | |
410 | const char *buf, size_t len, int nr) | |
411 | { | |
412 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
413 | struct lp55xx_chip *chip = led->chip; | |
414 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
415 | ||
416 | mutex_lock(&chip->lock); | |
417 | ||
418 | chip->engine_idx = nr; | |
419 | ||
420 | if (!strncmp(buf, "run", 3)) { | |
421 | lp5523_run_engine(chip, true); | |
422 | engine->mode = LP55XX_ENGINE_RUN; | |
423 | } else if (!strncmp(buf, "load", 4)) { | |
424 | lp5523_stop_engine(chip); | |
425 | lp5523_load_engine(chip); | |
426 | engine->mode = LP55XX_ENGINE_LOAD; | |
427 | } else if (!strncmp(buf, "disabled", 8)) { | |
428 | lp5523_stop_engine(chip); | |
429 | engine->mode = LP55XX_ENGINE_DISABLED; | |
430 | } | |
431 | ||
432 | mutex_unlock(&chip->lock); | |
433 | ||
434 | return len; | |
435 | } | |
436 | store_mode(1) | |
437 | store_mode(2) | |
438 | store_mode(3) | |
439 | ||
440 | static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len) | |
441 | { | |
442 | u16 tmp_mux = 0; | |
443 | int i; | |
444 | ||
445 | len = min_t(int, len, LP5523_MAX_LEDS); | |
446 | ||
447 | for (i = 0; i < len; i++) { | |
448 | switch (buf[i]) { | |
449 | case '1': | |
450 | tmp_mux |= (1 << i); | |
451 | break; | |
452 | case '0': | |
453 | break; | |
454 | case '\n': | |
455 | i = len; | |
456 | break; | |
457 | default: | |
458 | return -1; | |
459 | } | |
460 | } | |
461 | *mux = tmp_mux; | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
466 | static void lp5523_mux_to_array(u16 led_mux, char *array) | |
467 | { | |
468 | int i, pos = 0; | |
469 | for (i = 0; i < LP5523_MAX_LEDS; i++) | |
470 | pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i)); | |
471 | ||
472 | array[pos] = '\0'; | |
473 | } | |
474 | ||
475 | static ssize_t show_engine_leds(struct device *dev, | |
476 | struct device_attribute *attr, | |
477 | char *buf, int nr) | |
478 | { | |
479 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
480 | struct lp55xx_chip *chip = led->chip; | |
481 | char mux[LP5523_MAX_LEDS + 1]; | |
482 | ||
483 | lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux); | |
484 | ||
485 | return sprintf(buf, "%s\n", mux); | |
486 | } | |
487 | show_leds(1) | |
488 | show_leds(2) | |
489 | show_leds(3) | |
490 | ||
491 | static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr) | |
492 | { | |
493 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
494 | int ret; | |
495 | u8 mux_page[] = { | |
496 | [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1, | |
497 | [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2, | |
498 | [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3, | |
499 | }; | |
500 | ||
501 | lp5523_load_engine(chip); | |
502 | ||
503 | ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]); | |
504 | if (ret) | |
505 | return ret; | |
506 | ||
507 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8)); | |
508 | if (ret) | |
509 | return ret; | |
510 | ||
511 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux)); | |
512 | if (ret) | |
513 | return ret; | |
514 | ||
515 | engine->led_mux = mux; | |
516 | return 0; | |
517 | } | |
518 | ||
519 | static ssize_t store_engine_leds(struct device *dev, | |
520 | struct device_attribute *attr, | |
521 | const char *buf, size_t len, int nr) | |
522 | { | |
523 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
524 | struct lp55xx_chip *chip = led->chip; | |
525 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
526 | u16 mux = 0; | |
527 | ssize_t ret; | |
528 | ||
529 | if (lp5523_mux_parse(buf, &mux, len)) | |
530 | return -EINVAL; | |
531 | ||
532 | mutex_lock(&chip->lock); | |
533 | ||
534 | chip->engine_idx = nr; | |
535 | ret = -EINVAL; | |
536 | ||
537 | if (engine->mode != LP55XX_ENGINE_LOAD) | |
538 | goto leave; | |
539 | ||
540 | if (lp5523_load_mux(chip, mux, nr)) | |
541 | goto leave; | |
542 | ||
543 | ret = len; | |
544 | leave: | |
545 | mutex_unlock(&chip->lock); | |
546 | return ret; | |
547 | } | |
548 | store_leds(1) | |
549 | store_leds(2) | |
550 | store_leds(3) | |
551 | ||
552 | static ssize_t store_engine_load(struct device *dev, | |
553 | struct device_attribute *attr, | |
554 | const char *buf, size_t len, int nr) | |
555 | { | |
556 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
557 | struct lp55xx_chip *chip = led->chip; | |
558 | ||
559 | mutex_lock(&chip->lock); | |
560 | ||
561 | chip->engine_idx = nr; | |
562 | lp5523_load_engine_and_select_page(chip); | |
563 | ||
564 | mutex_unlock(&chip->lock); | |
565 | ||
566 | return lp5523_update_program_memory(chip, buf, len); | |
567 | } | |
568 | store_load(1) | |
569 | store_load(2) | |
570 | store_load(3) | |
571 | ||
0efba16c SO |
572 | static ssize_t lp5523_selftest(struct device *dev, |
573 | struct device_attribute *attr, | |
574 | char *buf) | |
575 | { | |
9ca3bd80 MWK |
576 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
577 | struct lp55xx_chip *chip = led->chip; | |
578 | struct lp55xx_platform_data *pdata = chip->pdata; | |
0efba16c | 579 | int i, ret, pos = 0; |
0efba16c SO |
580 | u8 status, adc, vdd; |
581 | ||
582 | mutex_lock(&chip->lock); | |
583 | ||
9ca3bd80 | 584 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
0efba16c SO |
585 | if (ret < 0) |
586 | goto fail; | |
587 | ||
588 | /* Check that ext clock is really in use if requested */ | |
9ca3bd80 | 589 | if (pdata->clock_mode == LP55XX_CLOCK_EXT) { |
0efba16c SO |
590 | if ((status & LP5523_EXT_CLK_USED) == 0) |
591 | goto fail; | |
9ca3bd80 | 592 | } |
0efba16c SO |
593 | |
594 | /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ | |
9ca3bd80 | 595 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16); |
2e4840ed | 596 | usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ |
9ca3bd80 | 597 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
598 | if (ret < 0) |
599 | goto fail; | |
600 | ||
0efba16c | 601 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 602 | usleep_range(3000, 6000); /* Was not ready. Wait little bit */ |
0efba16c | 603 | |
9ca3bd80 | 604 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); |
1b21ec5a JH |
605 | if (ret < 0) |
606 | goto fail; | |
607 | ||
0efba16c SO |
608 | vdd--; /* There may be some fluctuation in measurement */ |
609 | ||
0e202346 | 610 | for (i = 0; i < LP5523_MAX_LEDS; i++) { |
0efba16c | 611 | /* Skip non-existing channels */ |
9ca3bd80 | 612 | if (pdata->led_config[i].led_current == 0) |
0efba16c SO |
613 | continue; |
614 | ||
615 | /* Set default current */ | |
9ca3bd80 MWK |
616 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
617 | pdata->led_config[i].led_current); | |
0efba16c | 618 | |
9ca3bd80 | 619 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff); |
2e4840ed SO |
620 | /* let current stabilize 2 - 4ms before measurements start */ |
621 | usleep_range(2000, 4000); | |
9ca3bd80 | 622 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, |
0efba16c | 623 | LP5523_EN_LEDTEST | i); |
2e4840ed SO |
624 | /* ADC conversion time is 2.7 ms typically */ |
625 | usleep_range(3000, 6000); | |
9ca3bd80 | 626 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
627 | if (ret < 0) |
628 | goto fail; | |
629 | ||
0efba16c | 630 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 631 | usleep_range(3000, 6000);/* Was not ready. Wait. */ |
9ca3bd80 MWK |
632 | |
633 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); | |
1b21ec5a JH |
634 | if (ret < 0) |
635 | goto fail; | |
0efba16c SO |
636 | |
637 | if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) | |
638 | pos += sprintf(buf + pos, "LED %d FAIL\n", i); | |
639 | ||
9ca3bd80 | 640 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00); |
0efba16c SO |
641 | |
642 | /* Restore current */ | |
9ca3bd80 MWK |
643 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
644 | led->led_current); | |
0efba16c SO |
645 | led++; |
646 | } | |
647 | if (pos == 0) | |
648 | pos = sprintf(buf, "OK\n"); | |
649 | goto release_lock; | |
650 | fail: | |
651 | pos = sprintf(buf, "FAIL\n"); | |
652 | ||
653 | release_lock: | |
654 | mutex_unlock(&chip->lock); | |
655 | ||
656 | return pos; | |
657 | } | |
658 | ||
0efba16c SO |
659 | static void lp5523_led_brightness_work(struct work_struct *work) |
660 | { | |
a6e4679a | 661 | struct lp55xx_led *led = container_of(work, struct lp55xx_led, |
0efba16c | 662 | brightness_work); |
a6e4679a | 663 | struct lp55xx_chip *chip = led->chip; |
0efba16c SO |
664 | |
665 | mutex_lock(&chip->lock); | |
a6e4679a | 666 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, |
0efba16c | 667 | led->brightness); |
0efba16c SO |
668 | mutex_unlock(&chip->lock); |
669 | } | |
670 | ||
45e611bf MK |
671 | static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode); |
672 | static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode); | |
673 | static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode); | |
674 | static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds); | |
675 | static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds); | |
676 | static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds); | |
677 | static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load); | |
678 | static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load); | |
679 | static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load); | |
680 | static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest); | |
0efba16c SO |
681 | |
682 | static struct attribute *lp5523_attributes[] = { | |
45e611bf MK |
683 | &dev_attr_engine1_mode.attr, |
684 | &dev_attr_engine2_mode.attr, | |
685 | &dev_attr_engine3_mode.attr, | |
686 | &dev_attr_engine1_load.attr, | |
687 | &dev_attr_engine2_load.attr, | |
688 | &dev_attr_engine3_load.attr, | |
689 | &dev_attr_engine1_leds.attr, | |
690 | &dev_attr_engine2_leds.attr, | |
691 | &dev_attr_engine3_leds.attr, | |
0efba16c | 692 | &dev_attr_selftest.attr, |
f1625842 | 693 | NULL, |
0efba16c SO |
694 | }; |
695 | ||
696 | static const struct attribute_group lp5523_group = { | |
697 | .attrs = lp5523_attributes, | |
698 | }; | |
699 | ||
48068d5d MWK |
700 | /* Chip specific configurations */ |
701 | static struct lp55xx_device_config lp5523_cfg = { | |
702 | .reset = { | |
703 | .addr = LP5523_REG_RESET, | |
704 | .val = LP5523_RESET, | |
705 | }, | |
e3a700d8 MWK |
706 | .enable = { |
707 | .addr = LP5523_REG_ENABLE, | |
708 | .val = LP5523_ENABLE, | |
709 | }, | |
0e202346 | 710 | .max_channel = LP5523_MAX_LEDS, |
ffbdccdb | 711 | .post_init_device = lp5523_post_init_device, |
a6e4679a | 712 | .brightness_work_fn = lp5523_led_brightness_work, |
a96bfa13 | 713 | .set_led_current = lp5523_set_led_current, |
db6eaf83 MWK |
714 | .firmware_cb = lp5523_firmware_loaded, |
715 | .run_engine = lp5523_run_engine, | |
e73c0ce6 | 716 | .dev_attr_group = &lp5523_group, |
48068d5d MWK |
717 | }; |
718 | ||
98ea1ea2 | 719 | static int lp5523_probe(struct i2c_client *client, |
0efba16c SO |
720 | const struct i2c_device_id *id) |
721 | { | |
22ebeb48 | 722 | int ret; |
6a0c9a47 MWK |
723 | struct lp55xx_chip *chip; |
724 | struct lp55xx_led *led; | |
7542a04b LW |
725 | struct lp55xx_platform_data *pdata; |
726 | struct device_node *np = client->dev.of_node; | |
727 | ||
87aae1ea | 728 | if (!dev_get_platdata(&client->dev)) { |
7542a04b LW |
729 | if (np) { |
730 | ret = lp55xx_of_populate_pdata(&client->dev, np); | |
731 | if (ret < 0) | |
732 | return ret; | |
733 | } else { | |
734 | dev_err(&client->dev, "no platform data\n"); | |
735 | return -EINVAL; | |
736 | } | |
0efba16c | 737 | } |
87aae1ea | 738 | pdata = dev_get_platdata(&client->dev); |
0efba16c | 739 | |
6a0c9a47 MWK |
740 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
741 | if (!chip) | |
742 | return -ENOMEM; | |
743 | ||
744 | led = devm_kzalloc(&client->dev, | |
745 | sizeof(*led) * pdata->num_channels, GFP_KERNEL); | |
746 | if (!led) | |
747 | return -ENOMEM; | |
748 | ||
749 | chip->cl = client; | |
750 | chip->pdata = pdata; | |
48068d5d | 751 | chip->cfg = &lp5523_cfg; |
6a0c9a47 MWK |
752 | |
753 | mutex_init(&chip->lock); | |
0efba16c | 754 | |
6a0c9a47 | 755 | i2c_set_clientdata(client, led); |
0efba16c | 756 | |
22ebeb48 | 757 | ret = lp55xx_init_device(chip); |
0efba16c | 758 | if (ret) |
f6c64c6f | 759 | goto err_init; |
0efba16c | 760 | |
56a1e9ad | 761 | dev_info(&client->dev, "%s Programmable led chip found\n", id->name); |
0efba16c | 762 | |
9e9b3db1 | 763 | ret = lp55xx_register_leds(led, chip); |
f6524808 | 764 | if (ret) |
9e9b3db1 | 765 | goto err_register_leds; |
0efba16c | 766 | |
e73c0ce6 | 767 | ret = lp55xx_register_sysfs(chip); |
0efba16c SO |
768 | if (ret) { |
769 | dev_err(&client->dev, "registering sysfs failed\n"); | |
e73c0ce6 | 770 | goto err_register_sysfs; |
0efba16c | 771 | } |
e73c0ce6 MWK |
772 | |
773 | return 0; | |
774 | ||
775 | err_register_sysfs: | |
c3a68ebf | 776 | lp55xx_unregister_leds(led, chip); |
9e9b3db1 | 777 | err_register_leds: |
6ce61762 | 778 | lp55xx_deinit_device(chip); |
f6c64c6f | 779 | err_init: |
0efba16c SO |
780 | return ret; |
781 | } | |
782 | ||
783 | static int lp5523_remove(struct i2c_client *client) | |
784 | { | |
6ce61762 MWK |
785 | struct lp55xx_led *led = i2c_get_clientdata(client); |
786 | struct lp55xx_chip *chip = led->chip; | |
0efba16c | 787 | |
87cc4bde MWK |
788 | lp5523_stop_engine(chip); |
789 | lp55xx_unregister_sysfs(chip); | |
c3a68ebf | 790 | lp55xx_unregister_leds(led, chip); |
6ce61762 | 791 | lp55xx_deinit_device(chip); |
0efba16c | 792 | |
0efba16c SO |
793 | return 0; |
794 | } | |
795 | ||
796 | static const struct i2c_device_id lp5523_id[] = { | |
27d7704e KM |
797 | { "lp5523", LP5523 }, |
798 | { "lp55231", LP55231 }, | |
0efba16c SO |
799 | { } |
800 | }; | |
801 | ||
802 | MODULE_DEVICE_TABLE(i2c, lp5523_id); | |
803 | ||
33c88b67 AL |
804 | #ifdef CONFIG_OF |
805 | static const struct of_device_id of_lp5523_leds_match[] = { | |
806 | { .compatible = "national,lp5523", }, | |
807 | {}, | |
808 | }; | |
809 | ||
810 | MODULE_DEVICE_TABLE(of, of_lp5523_leds_match); | |
811 | #endif | |
812 | ||
0efba16c SO |
813 | static struct i2c_driver lp5523_driver = { |
814 | .driver = { | |
27d7704e | 815 | .name = "lp5523x", |
33c88b67 | 816 | .of_match_table = of_match_ptr(of_lp5523_leds_match), |
0efba16c SO |
817 | }, |
818 | .probe = lp5523_probe, | |
819 | .remove = lp5523_remove, | |
820 | .id_table = lp5523_id, | |
821 | }; | |
822 | ||
09a0d183 | 823 | module_i2c_driver(lp5523_driver); |
0efba16c SO |
824 | |
825 | MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>"); | |
a2387cb9 | 826 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
0efba16c SO |
827 | MODULE_DESCRIPTION("LP5523 LED engine"); |
828 | MODULE_LICENSE("GPL"); |