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> | |
c68f46dd | 32 | #include <linux/of.h> |
6a0c9a47 | 33 | #include <linux/platform_data/leds-lp55xx.h> |
79bcc10b | 34 | #include <linux/slab.h> |
6a0c9a47 MWK |
35 | |
36 | #include "leds-lp55xx-common.h" | |
0efba16c | 37 | |
12f022d2 MWK |
38 | #define LP5523_PROGRAM_LENGTH 32 |
39 | #define LP5523_MAX_LEDS 9 | |
40 | ||
41 | /* Registers */ | |
0efba16c SO |
42 | #define LP5523_REG_ENABLE 0x00 |
43 | #define LP5523_REG_OP_MODE 0x01 | |
0efba16c SO |
44 | #define LP5523_REG_ENABLE_LEDS_MSB 0x04 |
45 | #define LP5523_REG_ENABLE_LEDS_LSB 0x05 | |
0efba16c SO |
46 | #define LP5523_REG_LED_PWM_BASE 0x16 |
47 | #define LP5523_REG_LED_CURRENT_BASE 0x26 | |
48 | #define LP5523_REG_CONFIG 0x36 | |
12f022d2 MWK |
49 | #define LP5523_REG_STATUS 0x3A |
50 | #define LP5523_REG_RESET 0x3D | |
0efba16c SO |
51 | #define LP5523_REG_LED_TEST_CTRL 0x41 |
52 | #define LP5523_REG_LED_TEST_ADC 0x42 | |
22460438 MK |
53 | #define LP5523_REG_CH1_PROG_START 0x4C |
54 | #define LP5523_REG_CH2_PROG_START 0x4D | |
55 | #define LP5523_REG_CH3_PROG_START 0x4E | |
12f022d2 | 56 | #define LP5523_REG_PROG_PAGE_SEL 0x4F |
0efba16c SO |
57 | #define LP5523_REG_PROG_MEM 0x50 |
58 | ||
12f022d2 | 59 | /* Bit description in registers */ |
0efba16c SO |
60 | #define LP5523_ENABLE 0x40 |
61 | #define LP5523_AUTO_INC 0x40 | |
62 | #define LP5523_PWR_SAVE 0x20 | |
63 | #define LP5523_PWM_PWR_SAVE 0x04 | |
0efba16c | 64 | #define LP5523_CP_AUTO 0x18 |
0efba16c | 65 | #define LP5523_AUTO_CLK 0x02 |
12f022d2 | 66 | |
0efba16c SO |
67 | #define LP5523_EN_LEDTEST 0x80 |
68 | #define LP5523_LEDTEST_DONE 0x80 | |
48068d5d | 69 | #define LP5523_RESET 0xFF |
0efba16c | 70 | #define LP5523_ADC_SHORTCIRC_LIM 80 |
0efba16c | 71 | #define LP5523_EXT_CLK_USED 0x08 |
22460438 | 72 | #define LP5523_ENG_STATUS_MASK 0x07 |
0efba16c | 73 | |
db6eaf83 MWK |
74 | /* Memory Page Selection */ |
75 | #define LP5523_PAGE_ENG1 0 | |
76 | #define LP5523_PAGE_ENG2 1 | |
77 | #define LP5523_PAGE_ENG3 2 | |
45e611bf MK |
78 | #define LP5523_PAGE_MUX1 3 |
79 | #define LP5523_PAGE_MUX2 4 | |
80 | #define LP5523_PAGE_MUX3 5 | |
db6eaf83 MWK |
81 | |
82 | /* Program Memory Operations */ | |
83 | #define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */ | |
84 | #define LP5523_MODE_ENG2_M 0x0C | |
85 | #define LP5523_MODE_ENG3_M 0x03 | |
86 | #define LP5523_LOAD_ENG1 0x10 | |
87 | #define LP5523_LOAD_ENG2 0x04 | |
88 | #define LP5523_LOAD_ENG3 0x01 | |
89 | ||
90 | #define LP5523_ENG1_IS_LOADING(mode) \ | |
91 | ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1) | |
92 | #define LP5523_ENG2_IS_LOADING(mode) \ | |
93 | ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2) | |
94 | #define LP5523_ENG3_IS_LOADING(mode) \ | |
95 | ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3) | |
96 | ||
97 | #define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */ | |
98 | #define LP5523_EXEC_ENG2_M 0x0C | |
99 | #define LP5523_EXEC_ENG3_M 0x03 | |
100 | #define LP5523_EXEC_M 0x3F | |
101 | #define LP5523_RUN_ENG1 0x20 | |
102 | #define LP5523_RUN_ENG2 0x08 | |
103 | #define LP5523_RUN_ENG3 0x02 | |
104 | ||
45e611bf MK |
105 | #define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led))) |
106 | ||
27d7704e KM |
107 | enum lp5523_chip_id { |
108 | LP5523, | |
109 | LP55231, | |
110 | }; | |
111 | ||
22460438 MK |
112 | static int lp5523_init_program_engine(struct lp55xx_chip *chip); |
113 | ||
db6eaf83 MWK |
114 | static inline void lp5523_wait_opmode_done(void) |
115 | { | |
116 | usleep_range(1000, 2000); | |
117 | } | |
118 | ||
a96bfa13 MWK |
119 | static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) |
120 | { | |
121 | led->led_current = led_current; | |
122 | lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, | |
123 | led_current); | |
124 | } | |
125 | ||
ffbdccdb | 126 | static int lp5523_post_init_device(struct lp55xx_chip *chip) |
0efba16c | 127 | { |
ffbdccdb | 128 | int ret; |
0efba16c | 129 | |
ffbdccdb | 130 | ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE); |
632418bf MWK |
131 | if (ret) |
132 | return ret; | |
0efba16c | 133 | |
2e4840ed SO |
134 | /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ |
135 | usleep_range(1000, 2000); | |
0efba16c | 136 | |
ffbdccdb | 137 | ret = lp55xx_write(chip, LP5523_REG_CONFIG, |
0efba16c SO |
138 | LP5523_AUTO_INC | LP5523_PWR_SAVE | |
139 | LP5523_CP_AUTO | LP5523_AUTO_CLK | | |
140 | LP5523_PWM_PWR_SAVE); | |
632418bf MWK |
141 | if (ret) |
142 | return ret; | |
0efba16c SO |
143 | |
144 | /* turn on all leds */ | |
ffbdccdb | 145 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01); |
632418bf | 146 | if (ret) |
1b21ec5a JH |
147 | return ret; |
148 | ||
22460438 MK |
149 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff); |
150 | if (ret) | |
151 | return ret; | |
152 | ||
153 | return lp5523_init_program_engine(chip); | |
0efba16c SO |
154 | } |
155 | ||
db6eaf83 | 156 | static void lp5523_load_engine(struct lp55xx_chip *chip) |
0efba16c | 157 | { |
db6eaf83 MWK |
158 | enum lp55xx_engine_index idx = chip->engine_idx; |
159 | u8 mask[] = { | |
160 | [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, | |
161 | [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, | |
162 | [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, | |
163 | }; | |
164 | ||
165 | u8 val[] = { | |
166 | [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1, | |
167 | [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2, | |
168 | [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3, | |
169 | }; | |
170 | ||
b9e1730b MK |
171 | lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]); |
172 | ||
173 | lp5523_wait_opmode_done(); | |
174 | } | |
175 | ||
176 | static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip) | |
177 | { | |
178 | enum lp55xx_engine_index idx = chip->engine_idx; | |
db6eaf83 MWK |
179 | u8 page_sel[] = { |
180 | [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1, | |
181 | [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2, | |
182 | [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3, | |
183 | }; | |
184 | ||
b9e1730b | 185 | lp5523_load_engine(chip); |
db6eaf83 MWK |
186 | |
187 | lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); | |
0efba16c SO |
188 | } |
189 | ||
db6eaf83 | 190 | static void lp5523_stop_engine(struct lp55xx_chip *chip) |
0efba16c | 191 | { |
db6eaf83 MWK |
192 | lp55xx_write(chip, LP5523_REG_OP_MODE, 0); |
193 | lp5523_wait_opmode_done(); | |
194 | } | |
0efba16c | 195 | |
db6eaf83 MWK |
196 | static void lp5523_turn_off_channels(struct lp55xx_chip *chip) |
197 | { | |
198 | int i; | |
0efba16c | 199 | |
db6eaf83 MWK |
200 | for (i = 0; i < LP5523_MAX_LEDS; i++) |
201 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0); | |
0efba16c SO |
202 | } |
203 | ||
db6eaf83 | 204 | static void lp5523_run_engine(struct lp55xx_chip *chip, bool start) |
0efba16c | 205 | { |
db6eaf83 MWK |
206 | int ret; |
207 | u8 mode; | |
208 | u8 exec; | |
0efba16c | 209 | |
db6eaf83 MWK |
210 | /* stop engine */ |
211 | if (!start) { | |
212 | lp5523_stop_engine(chip); | |
213 | lp5523_turn_off_channels(chip); | |
214 | return; | |
215 | } | |
0efba16c | 216 | |
db6eaf83 MWK |
217 | /* |
218 | * To run the engine, | |
219 | * operation mode and enable register should updated at the same time | |
220 | */ | |
0efba16c | 221 | |
db6eaf83 MWK |
222 | ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode); |
223 | if (ret) | |
224 | return; | |
0efba16c | 225 | |
db6eaf83 MWK |
226 | ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec); |
227 | if (ret) | |
228 | return; | |
0efba16c | 229 | |
db6eaf83 MWK |
230 | /* change operation mode to RUN only when each engine is loading */ |
231 | if (LP5523_ENG1_IS_LOADING(mode)) { | |
232 | mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1; | |
233 | exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1; | |
234 | } | |
0efba16c | 235 | |
db6eaf83 MWK |
236 | if (LP5523_ENG2_IS_LOADING(mode)) { |
237 | mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2; | |
238 | exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2; | |
239 | } | |
0efba16c | 240 | |
db6eaf83 MWK |
241 | if (LP5523_ENG3_IS_LOADING(mode)) { |
242 | mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3; | |
243 | exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3; | |
244 | } | |
245 | ||
246 | lp55xx_write(chip, LP5523_REG_OP_MODE, mode); | |
247 | lp5523_wait_opmode_done(); | |
248 | ||
249 | lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec); | |
0efba16c SO |
250 | } |
251 | ||
22460438 MK |
252 | static int lp5523_init_program_engine(struct lp55xx_chip *chip) |
253 | { | |
254 | int i; | |
255 | int j; | |
256 | int ret; | |
257 | u8 status; | |
258 | /* one pattern per engine setting LED MUX start and stop addresses */ | |
259 | static const u8 pattern[][LP5523_PROGRAM_LENGTH] = { | |
260 | { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
261 | { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
262 | { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
263 | }; | |
264 | ||
265 | /* hardcode 32 bytes of memory for each engine from program memory */ | |
266 | ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00); | |
267 | if (ret) | |
268 | return ret; | |
269 | ||
270 | ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10); | |
271 | if (ret) | |
272 | return ret; | |
273 | ||
274 | ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20); | |
275 | if (ret) | |
276 | return ret; | |
277 | ||
278 | /* write LED MUX address space for each engine */ | |
279 | for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { | |
280 | chip->engine_idx = i; | |
281 | lp5523_load_engine_and_select_page(chip); | |
282 | ||
283 | for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) { | |
284 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j, | |
285 | pattern[i - 1][j]); | |
286 | if (ret) | |
287 | goto out; | |
288 | } | |
289 | } | |
290 | ||
291 | lp5523_run_engine(chip, true); | |
292 | ||
293 | /* Let the programs run for couple of ms and check the engine status */ | |
294 | usleep_range(3000, 6000); | |
295 | lp55xx_read(chip, LP5523_REG_STATUS, &status); | |
296 | status &= LP5523_ENG_STATUS_MASK; | |
297 | ||
298 | if (status != LP5523_ENG_STATUS_MASK) { | |
299 | dev_err(&chip->cl->dev, | |
300 | "cound not configure LED engine, status = 0x%.2x\n", | |
301 | status); | |
302 | ret = -1; | |
303 | } | |
304 | ||
305 | out: | |
306 | lp5523_stop_engine(chip); | |
307 | return ret; | |
308 | } | |
309 | ||
db6eaf83 MWK |
310 | static int lp5523_update_program_memory(struct lp55xx_chip *chip, |
311 | const u8 *data, size_t size) | |
0efba16c | 312 | { |
db6eaf83 MWK |
313 | u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; |
314 | unsigned cmd; | |
315 | char c[3]; | |
db6eaf83 | 316 | int nrchars; |
db6eaf83 | 317 | int ret; |
2f733cad MK |
318 | int offset = 0; |
319 | int i = 0; | |
0efba16c | 320 | |
db6eaf83 MWK |
321 | while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) { |
322 | /* separate sscanfs because length is working only for %s */ | |
323 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); | |
324 | if (ret != 1) | |
325 | goto err; | |
0efba16c | 326 | |
db6eaf83 MWK |
327 | ret = sscanf(c, "%2x", &cmd); |
328 | if (ret != 1) | |
329 | goto err; | |
0efba16c | 330 | |
db6eaf83 MWK |
331 | pattern[i] = (u8)cmd; |
332 | offset += nrchars; | |
333 | i++; | |
334 | } | |
0efba16c | 335 | |
db6eaf83 MWK |
336 | /* Each instruction is 16bit long. Check that length is even */ |
337 | if (i % 2) | |
338 | goto err; | |
0efba16c | 339 | |
2f733cad | 340 | for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) { |
45e611bf | 341 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); |
e70988d1 | 342 | if (ret) |
45e611bf | 343 | return -EINVAL; |
45e611bf MK |
344 | } |
345 | ||
45e611bf | 346 | return size; |
0efba16c | 347 | |
db6eaf83 MWK |
348 | err: |
349 | dev_err(&chip->cl->dev, "wrong pattern format\n"); | |
350 | return -EINVAL; | |
0efba16c | 351 | } |
0efba16c | 352 | |
db6eaf83 | 353 | static void lp5523_firmware_loaded(struct lp55xx_chip *chip) |
0efba16c | 354 | { |
db6eaf83 | 355 | const struct firmware *fw = chip->fw; |
fbac0812 | 356 | |
db6eaf83 MWK |
357 | if (fw->size > LP5523_PROGRAM_LENGTH) { |
358 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", | |
359 | fw->size); | |
360 | return; | |
361 | } | |
0efba16c | 362 | |
db6eaf83 MWK |
363 | /* |
364 | * Program momery sequence | |
365 | * 1) set engine mode to "LOAD" | |
366 | * 2) write firmware data into program memory | |
367 | */ | |
0efba16c | 368 | |
b9e1730b | 369 | lp5523_load_engine_and_select_page(chip); |
db6eaf83 | 370 | lp5523_update_program_memory(chip, fw->data, fw->size); |
0efba16c | 371 | } |
0efba16c | 372 | |
45e611bf MK |
373 | static ssize_t show_engine_mode(struct device *dev, |
374 | struct device_attribute *attr, | |
375 | char *buf, int nr) | |
376 | { | |
377 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
378 | struct lp55xx_chip *chip = led->chip; | |
379 | enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode; | |
380 | ||
381 | switch (mode) { | |
382 | case LP55XX_ENGINE_RUN: | |
383 | return sprintf(buf, "run\n"); | |
384 | case LP55XX_ENGINE_LOAD: | |
385 | return sprintf(buf, "load\n"); | |
386 | case LP55XX_ENGINE_DISABLED: | |
387 | default: | |
388 | return sprintf(buf, "disabled\n"); | |
389 | } | |
390 | } | |
391 | show_mode(1) | |
392 | show_mode(2) | |
393 | show_mode(3) | |
394 | ||
395 | static ssize_t store_engine_mode(struct device *dev, | |
396 | struct device_attribute *attr, | |
397 | const char *buf, size_t len, int nr) | |
398 | { | |
399 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
400 | struct lp55xx_chip *chip = led->chip; | |
401 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
402 | ||
403 | mutex_lock(&chip->lock); | |
404 | ||
405 | chip->engine_idx = nr; | |
406 | ||
407 | if (!strncmp(buf, "run", 3)) { | |
408 | lp5523_run_engine(chip, true); | |
409 | engine->mode = LP55XX_ENGINE_RUN; | |
410 | } else if (!strncmp(buf, "load", 4)) { | |
411 | lp5523_stop_engine(chip); | |
412 | lp5523_load_engine(chip); | |
413 | engine->mode = LP55XX_ENGINE_LOAD; | |
414 | } else if (!strncmp(buf, "disabled", 8)) { | |
415 | lp5523_stop_engine(chip); | |
416 | engine->mode = LP55XX_ENGINE_DISABLED; | |
417 | } | |
418 | ||
419 | mutex_unlock(&chip->lock); | |
420 | ||
421 | return len; | |
422 | } | |
423 | store_mode(1) | |
424 | store_mode(2) | |
425 | store_mode(3) | |
426 | ||
427 | static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len) | |
428 | { | |
429 | u16 tmp_mux = 0; | |
430 | int i; | |
431 | ||
432 | len = min_t(int, len, LP5523_MAX_LEDS); | |
433 | ||
434 | for (i = 0; i < len; i++) { | |
435 | switch (buf[i]) { | |
436 | case '1': | |
437 | tmp_mux |= (1 << i); | |
438 | break; | |
439 | case '0': | |
440 | break; | |
441 | case '\n': | |
442 | i = len; | |
443 | break; | |
444 | default: | |
445 | return -1; | |
446 | } | |
447 | } | |
448 | *mux = tmp_mux; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | static void lp5523_mux_to_array(u16 led_mux, char *array) | |
454 | { | |
455 | int i, pos = 0; | |
456 | for (i = 0; i < LP5523_MAX_LEDS; i++) | |
457 | pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i)); | |
458 | ||
459 | array[pos] = '\0'; | |
460 | } | |
461 | ||
462 | static ssize_t show_engine_leds(struct device *dev, | |
463 | struct device_attribute *attr, | |
464 | char *buf, int nr) | |
465 | { | |
466 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
467 | struct lp55xx_chip *chip = led->chip; | |
468 | char mux[LP5523_MAX_LEDS + 1]; | |
469 | ||
470 | lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux); | |
471 | ||
472 | return sprintf(buf, "%s\n", mux); | |
473 | } | |
474 | show_leds(1) | |
475 | show_leds(2) | |
476 | show_leds(3) | |
477 | ||
478 | static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr) | |
479 | { | |
480 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
481 | int ret; | |
482 | u8 mux_page[] = { | |
483 | [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1, | |
484 | [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2, | |
485 | [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3, | |
486 | }; | |
487 | ||
488 | lp5523_load_engine(chip); | |
489 | ||
490 | ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]); | |
491 | if (ret) | |
492 | return ret; | |
493 | ||
494 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8)); | |
495 | if (ret) | |
496 | return ret; | |
497 | ||
498 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux)); | |
499 | if (ret) | |
500 | return ret; | |
501 | ||
502 | engine->led_mux = mux; | |
503 | return 0; | |
504 | } | |
505 | ||
506 | static ssize_t store_engine_leds(struct device *dev, | |
507 | struct device_attribute *attr, | |
508 | const char *buf, size_t len, int nr) | |
509 | { | |
510 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
511 | struct lp55xx_chip *chip = led->chip; | |
512 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
513 | u16 mux = 0; | |
514 | ssize_t ret; | |
515 | ||
516 | if (lp5523_mux_parse(buf, &mux, len)) | |
517 | return -EINVAL; | |
518 | ||
519 | mutex_lock(&chip->lock); | |
520 | ||
521 | chip->engine_idx = nr; | |
522 | ret = -EINVAL; | |
523 | ||
524 | if (engine->mode != LP55XX_ENGINE_LOAD) | |
525 | goto leave; | |
526 | ||
527 | if (lp5523_load_mux(chip, mux, nr)) | |
528 | goto leave; | |
529 | ||
530 | ret = len; | |
531 | leave: | |
532 | mutex_unlock(&chip->lock); | |
533 | return ret; | |
534 | } | |
535 | store_leds(1) | |
536 | store_leds(2) | |
537 | store_leds(3) | |
538 | ||
539 | static ssize_t store_engine_load(struct device *dev, | |
540 | struct device_attribute *attr, | |
541 | const char *buf, size_t len, int nr) | |
542 | { | |
543 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
544 | struct lp55xx_chip *chip = led->chip; | |
e70988d1 | 545 | int ret; |
45e611bf MK |
546 | |
547 | mutex_lock(&chip->lock); | |
548 | ||
549 | chip->engine_idx = nr; | |
550 | lp5523_load_engine_and_select_page(chip); | |
e70988d1 | 551 | ret = lp5523_update_program_memory(chip, buf, len); |
45e611bf MK |
552 | |
553 | mutex_unlock(&chip->lock); | |
554 | ||
e70988d1 | 555 | return ret; |
45e611bf MK |
556 | } |
557 | store_load(1) | |
558 | store_load(2) | |
559 | store_load(3) | |
560 | ||
0efba16c SO |
561 | static ssize_t lp5523_selftest(struct device *dev, |
562 | struct device_attribute *attr, | |
563 | char *buf) | |
564 | { | |
9ca3bd80 MWK |
565 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
566 | struct lp55xx_chip *chip = led->chip; | |
567 | struct lp55xx_platform_data *pdata = chip->pdata; | |
0efba16c | 568 | int i, ret, pos = 0; |
0efba16c SO |
569 | u8 status, adc, vdd; |
570 | ||
571 | mutex_lock(&chip->lock); | |
572 | ||
9ca3bd80 | 573 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
0efba16c SO |
574 | if (ret < 0) |
575 | goto fail; | |
576 | ||
577 | /* Check that ext clock is really in use if requested */ | |
9ca3bd80 | 578 | if (pdata->clock_mode == LP55XX_CLOCK_EXT) { |
0efba16c SO |
579 | if ((status & LP5523_EXT_CLK_USED) == 0) |
580 | goto fail; | |
9ca3bd80 | 581 | } |
0efba16c SO |
582 | |
583 | /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ | |
9ca3bd80 | 584 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16); |
2e4840ed | 585 | usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ |
9ca3bd80 | 586 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
587 | if (ret < 0) |
588 | goto fail; | |
589 | ||
0efba16c | 590 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 591 | usleep_range(3000, 6000); /* Was not ready. Wait little bit */ |
0efba16c | 592 | |
9ca3bd80 | 593 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); |
1b21ec5a JH |
594 | if (ret < 0) |
595 | goto fail; | |
596 | ||
0efba16c SO |
597 | vdd--; /* There may be some fluctuation in measurement */ |
598 | ||
0e202346 | 599 | for (i = 0; i < LP5523_MAX_LEDS; i++) { |
0efba16c | 600 | /* Skip non-existing channels */ |
9ca3bd80 | 601 | if (pdata->led_config[i].led_current == 0) |
0efba16c SO |
602 | continue; |
603 | ||
604 | /* Set default current */ | |
9ca3bd80 MWK |
605 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
606 | pdata->led_config[i].led_current); | |
0efba16c | 607 | |
9ca3bd80 | 608 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff); |
2e4840ed SO |
609 | /* let current stabilize 2 - 4ms before measurements start */ |
610 | usleep_range(2000, 4000); | |
9ca3bd80 | 611 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, |
0efba16c | 612 | LP5523_EN_LEDTEST | i); |
2e4840ed SO |
613 | /* ADC conversion time is 2.7 ms typically */ |
614 | usleep_range(3000, 6000); | |
9ca3bd80 | 615 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
616 | if (ret < 0) |
617 | goto fail; | |
618 | ||
0efba16c | 619 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 620 | usleep_range(3000, 6000);/* Was not ready. Wait. */ |
9ca3bd80 MWK |
621 | |
622 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); | |
1b21ec5a JH |
623 | if (ret < 0) |
624 | goto fail; | |
0efba16c SO |
625 | |
626 | if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) | |
627 | pos += sprintf(buf + pos, "LED %d FAIL\n", i); | |
628 | ||
9ca3bd80 | 629 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00); |
0efba16c SO |
630 | |
631 | /* Restore current */ | |
9ca3bd80 MWK |
632 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
633 | led->led_current); | |
0efba16c SO |
634 | led++; |
635 | } | |
636 | if (pos == 0) | |
637 | pos = sprintf(buf, "OK\n"); | |
638 | goto release_lock; | |
639 | fail: | |
640 | pos = sprintf(buf, "FAIL\n"); | |
641 | ||
642 | release_lock: | |
643 | mutex_unlock(&chip->lock); | |
644 | ||
645 | return pos; | |
646 | } | |
647 | ||
0efba16c SO |
648 | static void lp5523_led_brightness_work(struct work_struct *work) |
649 | { | |
a6e4679a | 650 | struct lp55xx_led *led = container_of(work, struct lp55xx_led, |
0efba16c | 651 | brightness_work); |
a6e4679a | 652 | struct lp55xx_chip *chip = led->chip; |
0efba16c SO |
653 | |
654 | mutex_lock(&chip->lock); | |
a6e4679a | 655 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, |
0efba16c | 656 | led->brightness); |
0efba16c SO |
657 | mutex_unlock(&chip->lock); |
658 | } | |
659 | ||
45e611bf MK |
660 | static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode); |
661 | static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode); | |
662 | static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode); | |
663 | static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds); | |
664 | static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds); | |
665 | static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds); | |
666 | static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load); | |
667 | static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load); | |
668 | static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load); | |
669 | static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest); | |
0efba16c SO |
670 | |
671 | static struct attribute *lp5523_attributes[] = { | |
45e611bf MK |
672 | &dev_attr_engine1_mode.attr, |
673 | &dev_attr_engine2_mode.attr, | |
674 | &dev_attr_engine3_mode.attr, | |
675 | &dev_attr_engine1_load.attr, | |
676 | &dev_attr_engine2_load.attr, | |
677 | &dev_attr_engine3_load.attr, | |
678 | &dev_attr_engine1_leds.attr, | |
679 | &dev_attr_engine2_leds.attr, | |
680 | &dev_attr_engine3_leds.attr, | |
0efba16c | 681 | &dev_attr_selftest.attr, |
f1625842 | 682 | NULL, |
0efba16c SO |
683 | }; |
684 | ||
685 | static const struct attribute_group lp5523_group = { | |
686 | .attrs = lp5523_attributes, | |
687 | }; | |
688 | ||
48068d5d MWK |
689 | /* Chip specific configurations */ |
690 | static struct lp55xx_device_config lp5523_cfg = { | |
691 | .reset = { | |
692 | .addr = LP5523_REG_RESET, | |
693 | .val = LP5523_RESET, | |
694 | }, | |
e3a700d8 MWK |
695 | .enable = { |
696 | .addr = LP5523_REG_ENABLE, | |
697 | .val = LP5523_ENABLE, | |
698 | }, | |
0e202346 | 699 | .max_channel = LP5523_MAX_LEDS, |
ffbdccdb | 700 | .post_init_device = lp5523_post_init_device, |
a6e4679a | 701 | .brightness_work_fn = lp5523_led_brightness_work, |
a96bfa13 | 702 | .set_led_current = lp5523_set_led_current, |
db6eaf83 MWK |
703 | .firmware_cb = lp5523_firmware_loaded, |
704 | .run_engine = lp5523_run_engine, | |
e73c0ce6 | 705 | .dev_attr_group = &lp5523_group, |
48068d5d MWK |
706 | }; |
707 | ||
98ea1ea2 | 708 | static int lp5523_probe(struct i2c_client *client, |
0efba16c SO |
709 | const struct i2c_device_id *id) |
710 | { | |
22ebeb48 | 711 | int ret; |
6a0c9a47 MWK |
712 | struct lp55xx_chip *chip; |
713 | struct lp55xx_led *led; | |
7542a04b LW |
714 | struct lp55xx_platform_data *pdata; |
715 | struct device_node *np = client->dev.of_node; | |
716 | ||
87aae1ea | 717 | if (!dev_get_platdata(&client->dev)) { |
7542a04b LW |
718 | if (np) { |
719 | ret = lp55xx_of_populate_pdata(&client->dev, np); | |
720 | if (ret < 0) | |
721 | return ret; | |
722 | } else { | |
723 | dev_err(&client->dev, "no platform data\n"); | |
724 | return -EINVAL; | |
725 | } | |
0efba16c | 726 | } |
87aae1ea | 727 | pdata = dev_get_platdata(&client->dev); |
0efba16c | 728 | |
6a0c9a47 MWK |
729 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
730 | if (!chip) | |
731 | return -ENOMEM; | |
732 | ||
733 | led = devm_kzalloc(&client->dev, | |
734 | sizeof(*led) * pdata->num_channels, GFP_KERNEL); | |
735 | if (!led) | |
736 | return -ENOMEM; | |
737 | ||
738 | chip->cl = client; | |
739 | chip->pdata = pdata; | |
48068d5d | 740 | chip->cfg = &lp5523_cfg; |
6a0c9a47 MWK |
741 | |
742 | mutex_init(&chip->lock); | |
0efba16c | 743 | |
6a0c9a47 | 744 | i2c_set_clientdata(client, led); |
0efba16c | 745 | |
22ebeb48 | 746 | ret = lp55xx_init_device(chip); |
0efba16c | 747 | if (ret) |
f6c64c6f | 748 | goto err_init; |
0efba16c | 749 | |
56a1e9ad | 750 | dev_info(&client->dev, "%s Programmable led chip found\n", id->name); |
0efba16c | 751 | |
9e9b3db1 | 752 | ret = lp55xx_register_leds(led, chip); |
f6524808 | 753 | if (ret) |
9e9b3db1 | 754 | goto err_register_leds; |
0efba16c | 755 | |
e73c0ce6 | 756 | ret = lp55xx_register_sysfs(chip); |
0efba16c SO |
757 | if (ret) { |
758 | dev_err(&client->dev, "registering sysfs failed\n"); | |
e73c0ce6 | 759 | goto err_register_sysfs; |
0efba16c | 760 | } |
e73c0ce6 MWK |
761 | |
762 | return 0; | |
763 | ||
764 | err_register_sysfs: | |
c3a68ebf | 765 | lp55xx_unregister_leds(led, chip); |
9e9b3db1 | 766 | err_register_leds: |
6ce61762 | 767 | lp55xx_deinit_device(chip); |
f6c64c6f | 768 | err_init: |
0efba16c SO |
769 | return ret; |
770 | } | |
771 | ||
772 | static int lp5523_remove(struct i2c_client *client) | |
773 | { | |
6ce61762 MWK |
774 | struct lp55xx_led *led = i2c_get_clientdata(client); |
775 | struct lp55xx_chip *chip = led->chip; | |
0efba16c | 776 | |
87cc4bde MWK |
777 | lp5523_stop_engine(chip); |
778 | lp55xx_unregister_sysfs(chip); | |
c3a68ebf | 779 | lp55xx_unregister_leds(led, chip); |
6ce61762 | 780 | lp55xx_deinit_device(chip); |
0efba16c | 781 | |
0efba16c SO |
782 | return 0; |
783 | } | |
784 | ||
785 | static const struct i2c_device_id lp5523_id[] = { | |
27d7704e KM |
786 | { "lp5523", LP5523 }, |
787 | { "lp55231", LP55231 }, | |
0efba16c SO |
788 | { } |
789 | }; | |
790 | ||
791 | MODULE_DEVICE_TABLE(i2c, lp5523_id); | |
792 | ||
33c88b67 AL |
793 | #ifdef CONFIG_OF |
794 | static const struct of_device_id of_lp5523_leds_match[] = { | |
795 | { .compatible = "national,lp5523", }, | |
796 | {}, | |
797 | }; | |
798 | ||
799 | MODULE_DEVICE_TABLE(of, of_lp5523_leds_match); | |
800 | #endif | |
801 | ||
0efba16c SO |
802 | static struct i2c_driver lp5523_driver = { |
803 | .driver = { | |
27d7704e | 804 | .name = "lp5523x", |
33c88b67 | 805 | .of_match_table = of_match_ptr(of_lp5523_leds_match), |
0efba16c SO |
806 | }, |
807 | .probe = lp5523_probe, | |
808 | .remove = lp5523_remove, | |
809 | .id_table = lp5523_id, | |
810 | }; | |
811 | ||
09a0d183 | 812 | module_i2c_driver(lp5523_driver); |
0efba16c SO |
813 | |
814 | MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>"); | |
a2387cb9 | 815 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
0efba16c SO |
816 | MODULE_DESCRIPTION("LP5523 LED engine"); |
817 | MODULE_LICENSE("GPL"); |