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> | |
0efba16c | 28 | #include <linux/leds.h> |
79bcc10b MWK |
29 | #include <linux/module.h> |
30 | #include <linux/mutex.h> | |
c68f46dd | 31 | #include <linux/of.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 | |
bfb18d82 PM |
37 | #define LP5523_PROGRAM_LENGTH 32 /* bytes */ |
38 | /* Memory is used like this: | |
39 | 0x00 engine 1 program | |
40 | 0x10 engine 2 program | |
41 | 0x20 engine 3 program | |
42 | 0x30 engine 1 muxing info | |
43 | 0x40 engine 2 muxing info | |
44 | 0x50 engine 3 muxing info | |
45 | */ | |
12f022d2 MWK |
46 | #define LP5523_MAX_LEDS 9 |
47 | ||
48 | /* Registers */ | |
0efba16c SO |
49 | #define LP5523_REG_ENABLE 0x00 |
50 | #define LP5523_REG_OP_MODE 0x01 | |
0efba16c SO |
51 | #define LP5523_REG_ENABLE_LEDS_MSB 0x04 |
52 | #define LP5523_REG_ENABLE_LEDS_LSB 0x05 | |
0efba16c SO |
53 | #define LP5523_REG_LED_PWM_BASE 0x16 |
54 | #define LP5523_REG_LED_CURRENT_BASE 0x26 | |
55 | #define LP5523_REG_CONFIG 0x36 | |
12f022d2 MWK |
56 | #define LP5523_REG_STATUS 0x3A |
57 | #define LP5523_REG_RESET 0x3D | |
0efba16c SO |
58 | #define LP5523_REG_LED_TEST_CTRL 0x41 |
59 | #define LP5523_REG_LED_TEST_ADC 0x42 | |
22460438 MK |
60 | #define LP5523_REG_CH1_PROG_START 0x4C |
61 | #define LP5523_REG_CH2_PROG_START 0x4D | |
62 | #define LP5523_REG_CH3_PROG_START 0x4E | |
12f022d2 | 63 | #define LP5523_REG_PROG_PAGE_SEL 0x4F |
0efba16c SO |
64 | #define LP5523_REG_PROG_MEM 0x50 |
65 | ||
12f022d2 | 66 | /* Bit description in registers */ |
0efba16c SO |
67 | #define LP5523_ENABLE 0x40 |
68 | #define LP5523_AUTO_INC 0x40 | |
69 | #define LP5523_PWR_SAVE 0x20 | |
70 | #define LP5523_PWM_PWR_SAVE 0x04 | |
0efba16c | 71 | #define LP5523_CP_AUTO 0x18 |
0efba16c | 72 | #define LP5523_AUTO_CLK 0x02 |
12f022d2 | 73 | |
0efba16c SO |
74 | #define LP5523_EN_LEDTEST 0x80 |
75 | #define LP5523_LEDTEST_DONE 0x80 | |
48068d5d | 76 | #define LP5523_RESET 0xFF |
0efba16c | 77 | #define LP5523_ADC_SHORTCIRC_LIM 80 |
0efba16c | 78 | #define LP5523_EXT_CLK_USED 0x08 |
22460438 | 79 | #define LP5523_ENG_STATUS_MASK 0x07 |
0efba16c | 80 | |
db6eaf83 MWK |
81 | /* Memory Page Selection */ |
82 | #define LP5523_PAGE_ENG1 0 | |
83 | #define LP5523_PAGE_ENG2 1 | |
84 | #define LP5523_PAGE_ENG3 2 | |
45e611bf MK |
85 | #define LP5523_PAGE_MUX1 3 |
86 | #define LP5523_PAGE_MUX2 4 | |
87 | #define LP5523_PAGE_MUX3 5 | |
db6eaf83 MWK |
88 | |
89 | /* Program Memory Operations */ | |
90 | #define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */ | |
91 | #define LP5523_MODE_ENG2_M 0x0C | |
92 | #define LP5523_MODE_ENG3_M 0x03 | |
93 | #define LP5523_LOAD_ENG1 0x10 | |
94 | #define LP5523_LOAD_ENG2 0x04 | |
95 | #define LP5523_LOAD_ENG3 0x01 | |
96 | ||
97 | #define LP5523_ENG1_IS_LOADING(mode) \ | |
98 | ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1) | |
99 | #define LP5523_ENG2_IS_LOADING(mode) \ | |
100 | ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2) | |
101 | #define LP5523_ENG3_IS_LOADING(mode) \ | |
102 | ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3) | |
103 | ||
104 | #define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */ | |
105 | #define LP5523_EXEC_ENG2_M 0x0C | |
106 | #define LP5523_EXEC_ENG3_M 0x03 | |
107 | #define LP5523_EXEC_M 0x3F | |
108 | #define LP5523_RUN_ENG1 0x20 | |
109 | #define LP5523_RUN_ENG2 0x08 | |
110 | #define LP5523_RUN_ENG3 0x02 | |
111 | ||
45e611bf MK |
112 | #define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led))) |
113 | ||
27d7704e KM |
114 | enum lp5523_chip_id { |
115 | LP5523, | |
116 | LP55231, | |
117 | }; | |
118 | ||
22460438 MK |
119 | static int lp5523_init_program_engine(struct lp55xx_chip *chip); |
120 | ||
db6eaf83 MWK |
121 | static inline void lp5523_wait_opmode_done(void) |
122 | { | |
123 | usleep_range(1000, 2000); | |
124 | } | |
125 | ||
a96bfa13 MWK |
126 | static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) |
127 | { | |
128 | led->led_current = led_current; | |
129 | lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, | |
130 | led_current); | |
131 | } | |
132 | ||
ffbdccdb | 133 | static int lp5523_post_init_device(struct lp55xx_chip *chip) |
0efba16c | 134 | { |
ffbdccdb | 135 | int ret; |
0efba16c | 136 | |
ffbdccdb | 137 | ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE); |
632418bf MWK |
138 | if (ret) |
139 | return ret; | |
0efba16c | 140 | |
2e4840ed SO |
141 | /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ |
142 | usleep_range(1000, 2000); | |
0efba16c | 143 | |
ffbdccdb | 144 | ret = lp55xx_write(chip, LP5523_REG_CONFIG, |
0efba16c SO |
145 | LP5523_AUTO_INC | LP5523_PWR_SAVE | |
146 | LP5523_CP_AUTO | LP5523_AUTO_CLK | | |
147 | LP5523_PWM_PWR_SAVE); | |
632418bf MWK |
148 | if (ret) |
149 | return ret; | |
0efba16c SO |
150 | |
151 | /* turn on all leds */ | |
ffbdccdb | 152 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01); |
632418bf | 153 | if (ret) |
1b21ec5a JH |
154 | return ret; |
155 | ||
22460438 MK |
156 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff); |
157 | if (ret) | |
158 | return ret; | |
159 | ||
160 | return lp5523_init_program_engine(chip); | |
0efba16c SO |
161 | } |
162 | ||
db6eaf83 | 163 | static void lp5523_load_engine(struct lp55xx_chip *chip) |
0efba16c | 164 | { |
db6eaf83 MWK |
165 | enum lp55xx_engine_index idx = chip->engine_idx; |
166 | u8 mask[] = { | |
167 | [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, | |
168 | [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, | |
169 | [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, | |
170 | }; | |
171 | ||
172 | u8 val[] = { | |
173 | [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1, | |
174 | [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2, | |
175 | [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3, | |
176 | }; | |
177 | ||
b9e1730b MK |
178 | lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]); |
179 | ||
180 | lp5523_wait_opmode_done(); | |
181 | } | |
182 | ||
183 | static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip) | |
184 | { | |
185 | enum lp55xx_engine_index idx = chip->engine_idx; | |
db6eaf83 MWK |
186 | u8 page_sel[] = { |
187 | [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1, | |
188 | [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2, | |
189 | [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3, | |
190 | }; | |
191 | ||
b9e1730b | 192 | lp5523_load_engine(chip); |
db6eaf83 MWK |
193 | |
194 | lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); | |
0efba16c SO |
195 | } |
196 | ||
28c9266b | 197 | static void lp5523_stop_all_engines(struct lp55xx_chip *chip) |
0efba16c | 198 | { |
db6eaf83 MWK |
199 | lp55xx_write(chip, LP5523_REG_OP_MODE, 0); |
200 | lp5523_wait_opmode_done(); | |
201 | } | |
0efba16c | 202 | |
28c9266b MK |
203 | static void lp5523_stop_engine(struct lp55xx_chip *chip) |
204 | { | |
205 | enum lp55xx_engine_index idx = chip->engine_idx; | |
206 | u8 mask[] = { | |
207 | [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, | |
208 | [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, | |
209 | [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, | |
210 | }; | |
211 | ||
212 | lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0); | |
213 | ||
214 | lp5523_wait_opmode_done(); | |
215 | } | |
216 | ||
db6eaf83 MWK |
217 | static void lp5523_turn_off_channels(struct lp55xx_chip *chip) |
218 | { | |
219 | int i; | |
0efba16c | 220 | |
db6eaf83 MWK |
221 | for (i = 0; i < LP5523_MAX_LEDS; i++) |
222 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0); | |
0efba16c SO |
223 | } |
224 | ||
db6eaf83 | 225 | static void lp5523_run_engine(struct lp55xx_chip *chip, bool start) |
0efba16c | 226 | { |
db6eaf83 MWK |
227 | int ret; |
228 | u8 mode; | |
229 | u8 exec; | |
0efba16c | 230 | |
db6eaf83 MWK |
231 | /* stop engine */ |
232 | if (!start) { | |
233 | lp5523_stop_engine(chip); | |
234 | lp5523_turn_off_channels(chip); | |
235 | return; | |
236 | } | |
0efba16c | 237 | |
db6eaf83 MWK |
238 | /* |
239 | * To run the engine, | |
240 | * operation mode and enable register should updated at the same time | |
241 | */ | |
0efba16c | 242 | |
db6eaf83 MWK |
243 | ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode); |
244 | if (ret) | |
245 | return; | |
0efba16c | 246 | |
db6eaf83 MWK |
247 | ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec); |
248 | if (ret) | |
249 | return; | |
0efba16c | 250 | |
db6eaf83 MWK |
251 | /* change operation mode to RUN only when each engine is loading */ |
252 | if (LP5523_ENG1_IS_LOADING(mode)) { | |
253 | mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1; | |
254 | exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1; | |
255 | } | |
0efba16c | 256 | |
db6eaf83 MWK |
257 | if (LP5523_ENG2_IS_LOADING(mode)) { |
258 | mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2; | |
259 | exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2; | |
260 | } | |
0efba16c | 261 | |
db6eaf83 MWK |
262 | if (LP5523_ENG3_IS_LOADING(mode)) { |
263 | mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3; | |
264 | exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3; | |
265 | } | |
266 | ||
267 | lp55xx_write(chip, LP5523_REG_OP_MODE, mode); | |
268 | lp5523_wait_opmode_done(); | |
269 | ||
270 | lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec); | |
0efba16c SO |
271 | } |
272 | ||
22460438 MK |
273 | static int lp5523_init_program_engine(struct lp55xx_chip *chip) |
274 | { | |
275 | int i; | |
276 | int j; | |
277 | int ret; | |
278 | u8 status; | |
279 | /* one pattern per engine setting LED MUX start and stop addresses */ | |
280 | static const u8 pattern[][LP5523_PROGRAM_LENGTH] = { | |
281 | { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
282 | { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
283 | { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
284 | }; | |
285 | ||
286 | /* hardcode 32 bytes of memory for each engine from program memory */ | |
287 | ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00); | |
288 | if (ret) | |
289 | return ret; | |
290 | ||
291 | ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10); | |
292 | if (ret) | |
293 | return ret; | |
294 | ||
295 | ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20); | |
296 | if (ret) | |
297 | return ret; | |
298 | ||
299 | /* write LED MUX address space for each engine */ | |
300 | for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { | |
301 | chip->engine_idx = i; | |
302 | lp5523_load_engine_and_select_page(chip); | |
303 | ||
304 | for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) { | |
305 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j, | |
306 | pattern[i - 1][j]); | |
307 | if (ret) | |
308 | goto out; | |
309 | } | |
310 | } | |
311 | ||
312 | lp5523_run_engine(chip, true); | |
313 | ||
314 | /* Let the programs run for couple of ms and check the engine status */ | |
315 | usleep_range(3000, 6000); | |
316 | lp55xx_read(chip, LP5523_REG_STATUS, &status); | |
317 | status &= LP5523_ENG_STATUS_MASK; | |
318 | ||
319 | if (status != LP5523_ENG_STATUS_MASK) { | |
320 | dev_err(&chip->cl->dev, | |
321 | "cound not configure LED engine, status = 0x%.2x\n", | |
322 | status); | |
323 | ret = -1; | |
324 | } | |
325 | ||
326 | out: | |
28c9266b | 327 | lp5523_stop_all_engines(chip); |
22460438 MK |
328 | return ret; |
329 | } | |
330 | ||
db6eaf83 MWK |
331 | static int lp5523_update_program_memory(struct lp55xx_chip *chip, |
332 | const u8 *data, size_t size) | |
0efba16c | 333 | { |
db6eaf83 MWK |
334 | u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; |
335 | unsigned cmd; | |
336 | char c[3]; | |
db6eaf83 | 337 | int nrchars; |
db6eaf83 | 338 | int ret; |
2f733cad MK |
339 | int offset = 0; |
340 | int i = 0; | |
0efba16c | 341 | |
db6eaf83 MWK |
342 | while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) { |
343 | /* separate sscanfs because length is working only for %s */ | |
344 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); | |
345 | if (ret != 1) | |
346 | goto err; | |
0efba16c | 347 | |
db6eaf83 MWK |
348 | ret = sscanf(c, "%2x", &cmd); |
349 | if (ret != 1) | |
350 | goto err; | |
0efba16c | 351 | |
db6eaf83 MWK |
352 | pattern[i] = (u8)cmd; |
353 | offset += nrchars; | |
354 | i++; | |
355 | } | |
0efba16c | 356 | |
db6eaf83 MWK |
357 | /* Each instruction is 16bit long. Check that length is even */ |
358 | if (i % 2) | |
359 | goto err; | |
0efba16c | 360 | |
2f733cad | 361 | for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) { |
45e611bf | 362 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); |
e70988d1 | 363 | if (ret) |
45e611bf | 364 | return -EINVAL; |
45e611bf MK |
365 | } |
366 | ||
45e611bf | 367 | return size; |
0efba16c | 368 | |
db6eaf83 MWK |
369 | err: |
370 | dev_err(&chip->cl->dev, "wrong pattern format\n"); | |
371 | return -EINVAL; | |
0efba16c | 372 | } |
0efba16c | 373 | |
db6eaf83 | 374 | static void lp5523_firmware_loaded(struct lp55xx_chip *chip) |
0efba16c | 375 | { |
db6eaf83 | 376 | const struct firmware *fw = chip->fw; |
fbac0812 | 377 | |
db6eaf83 MWK |
378 | if (fw->size > LP5523_PROGRAM_LENGTH) { |
379 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", | |
380 | fw->size); | |
381 | return; | |
382 | } | |
0efba16c | 383 | |
db6eaf83 MWK |
384 | /* |
385 | * Program momery sequence | |
386 | * 1) set engine mode to "LOAD" | |
387 | * 2) write firmware data into program memory | |
388 | */ | |
0efba16c | 389 | |
b9e1730b | 390 | lp5523_load_engine_and_select_page(chip); |
db6eaf83 | 391 | lp5523_update_program_memory(chip, fw->data, fw->size); |
0efba16c | 392 | } |
0efba16c | 393 | |
45e611bf MK |
394 | static ssize_t show_engine_mode(struct device *dev, |
395 | struct device_attribute *attr, | |
396 | char *buf, int nr) | |
397 | { | |
398 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
399 | struct lp55xx_chip *chip = led->chip; | |
400 | enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode; | |
401 | ||
402 | switch (mode) { | |
403 | case LP55XX_ENGINE_RUN: | |
404 | return sprintf(buf, "run\n"); | |
405 | case LP55XX_ENGINE_LOAD: | |
406 | return sprintf(buf, "load\n"); | |
407 | case LP55XX_ENGINE_DISABLED: | |
408 | default: | |
409 | return sprintf(buf, "disabled\n"); | |
410 | } | |
411 | } | |
412 | show_mode(1) | |
413 | show_mode(2) | |
414 | show_mode(3) | |
415 | ||
416 | static ssize_t store_engine_mode(struct device *dev, | |
417 | struct device_attribute *attr, | |
418 | const char *buf, size_t len, int nr) | |
419 | { | |
420 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
421 | struct lp55xx_chip *chip = led->chip; | |
422 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
423 | ||
424 | mutex_lock(&chip->lock); | |
425 | ||
426 | chip->engine_idx = nr; | |
427 | ||
428 | if (!strncmp(buf, "run", 3)) { | |
429 | lp5523_run_engine(chip, true); | |
430 | engine->mode = LP55XX_ENGINE_RUN; | |
431 | } else if (!strncmp(buf, "load", 4)) { | |
432 | lp5523_stop_engine(chip); | |
433 | lp5523_load_engine(chip); | |
434 | engine->mode = LP55XX_ENGINE_LOAD; | |
435 | } else if (!strncmp(buf, "disabled", 8)) { | |
436 | lp5523_stop_engine(chip); | |
437 | engine->mode = LP55XX_ENGINE_DISABLED; | |
438 | } | |
439 | ||
440 | mutex_unlock(&chip->lock); | |
441 | ||
442 | return len; | |
443 | } | |
444 | store_mode(1) | |
445 | store_mode(2) | |
446 | store_mode(3) | |
447 | ||
448 | static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len) | |
449 | { | |
450 | u16 tmp_mux = 0; | |
451 | int i; | |
452 | ||
453 | len = min_t(int, len, LP5523_MAX_LEDS); | |
454 | ||
455 | for (i = 0; i < len; i++) { | |
456 | switch (buf[i]) { | |
457 | case '1': | |
458 | tmp_mux |= (1 << i); | |
459 | break; | |
460 | case '0': | |
461 | break; | |
462 | case '\n': | |
463 | i = len; | |
464 | break; | |
465 | default: | |
466 | return -1; | |
467 | } | |
468 | } | |
469 | *mux = tmp_mux; | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | static void lp5523_mux_to_array(u16 led_mux, char *array) | |
475 | { | |
476 | int i, pos = 0; | |
477 | for (i = 0; i < LP5523_MAX_LEDS; i++) | |
478 | pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i)); | |
479 | ||
480 | array[pos] = '\0'; | |
481 | } | |
482 | ||
483 | static ssize_t show_engine_leds(struct device *dev, | |
484 | struct device_attribute *attr, | |
485 | char *buf, int nr) | |
486 | { | |
487 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
488 | struct lp55xx_chip *chip = led->chip; | |
489 | char mux[LP5523_MAX_LEDS + 1]; | |
490 | ||
491 | lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux); | |
492 | ||
493 | return sprintf(buf, "%s\n", mux); | |
494 | } | |
495 | show_leds(1) | |
496 | show_leds(2) | |
497 | show_leds(3) | |
498 | ||
499 | static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr) | |
500 | { | |
501 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
502 | int ret; | |
503 | u8 mux_page[] = { | |
504 | [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1, | |
505 | [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2, | |
506 | [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3, | |
507 | }; | |
508 | ||
509 | lp5523_load_engine(chip); | |
510 | ||
511 | ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]); | |
512 | if (ret) | |
513 | return ret; | |
514 | ||
515 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8)); | |
516 | if (ret) | |
517 | return ret; | |
518 | ||
519 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux)); | |
520 | if (ret) | |
521 | return ret; | |
522 | ||
523 | engine->led_mux = mux; | |
524 | return 0; | |
525 | } | |
526 | ||
527 | static ssize_t store_engine_leds(struct device *dev, | |
528 | struct device_attribute *attr, | |
529 | const char *buf, size_t len, int nr) | |
530 | { | |
531 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
532 | struct lp55xx_chip *chip = led->chip; | |
533 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
534 | u16 mux = 0; | |
535 | ssize_t ret; | |
536 | ||
537 | if (lp5523_mux_parse(buf, &mux, len)) | |
538 | return -EINVAL; | |
539 | ||
540 | mutex_lock(&chip->lock); | |
541 | ||
542 | chip->engine_idx = nr; | |
543 | ret = -EINVAL; | |
544 | ||
545 | if (engine->mode != LP55XX_ENGINE_LOAD) | |
546 | goto leave; | |
547 | ||
548 | if (lp5523_load_mux(chip, mux, nr)) | |
549 | goto leave; | |
550 | ||
551 | ret = len; | |
552 | leave: | |
553 | mutex_unlock(&chip->lock); | |
554 | return ret; | |
555 | } | |
556 | store_leds(1) | |
557 | store_leds(2) | |
558 | store_leds(3) | |
559 | ||
560 | static ssize_t store_engine_load(struct device *dev, | |
561 | struct device_attribute *attr, | |
562 | const char *buf, size_t len, int nr) | |
563 | { | |
564 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
565 | struct lp55xx_chip *chip = led->chip; | |
e70988d1 | 566 | int ret; |
45e611bf MK |
567 | |
568 | mutex_lock(&chip->lock); | |
569 | ||
570 | chip->engine_idx = nr; | |
571 | lp5523_load_engine_and_select_page(chip); | |
e70988d1 | 572 | ret = lp5523_update_program_memory(chip, buf, len); |
45e611bf MK |
573 | |
574 | mutex_unlock(&chip->lock); | |
575 | ||
e70988d1 | 576 | return ret; |
45e611bf MK |
577 | } |
578 | store_load(1) | |
579 | store_load(2) | |
580 | store_load(3) | |
581 | ||
0efba16c SO |
582 | static ssize_t lp5523_selftest(struct device *dev, |
583 | struct device_attribute *attr, | |
584 | char *buf) | |
585 | { | |
9ca3bd80 MWK |
586 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
587 | struct lp55xx_chip *chip = led->chip; | |
588 | struct lp55xx_platform_data *pdata = chip->pdata; | |
0efba16c | 589 | int i, ret, pos = 0; |
0efba16c SO |
590 | u8 status, adc, vdd; |
591 | ||
592 | mutex_lock(&chip->lock); | |
593 | ||
9ca3bd80 | 594 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
0efba16c SO |
595 | if (ret < 0) |
596 | goto fail; | |
597 | ||
598 | /* Check that ext clock is really in use if requested */ | |
9ca3bd80 | 599 | if (pdata->clock_mode == LP55XX_CLOCK_EXT) { |
0efba16c SO |
600 | if ((status & LP5523_EXT_CLK_USED) == 0) |
601 | goto fail; | |
9ca3bd80 | 602 | } |
0efba16c SO |
603 | |
604 | /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ | |
9ca3bd80 | 605 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16); |
2e4840ed | 606 | usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ |
9ca3bd80 | 607 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
608 | if (ret < 0) |
609 | goto fail; | |
610 | ||
0efba16c | 611 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 612 | usleep_range(3000, 6000); /* Was not ready. Wait little bit */ |
0efba16c | 613 | |
9ca3bd80 | 614 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); |
1b21ec5a JH |
615 | if (ret < 0) |
616 | goto fail; | |
617 | ||
0efba16c SO |
618 | vdd--; /* There may be some fluctuation in measurement */ |
619 | ||
0e202346 | 620 | for (i = 0; i < LP5523_MAX_LEDS; i++) { |
0efba16c | 621 | /* Skip non-existing channels */ |
9ca3bd80 | 622 | if (pdata->led_config[i].led_current == 0) |
0efba16c SO |
623 | continue; |
624 | ||
625 | /* Set default current */ | |
9ca3bd80 MWK |
626 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
627 | pdata->led_config[i].led_current); | |
0efba16c | 628 | |
9ca3bd80 | 629 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff); |
2e4840ed SO |
630 | /* let current stabilize 2 - 4ms before measurements start */ |
631 | usleep_range(2000, 4000); | |
9ca3bd80 | 632 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, |
0efba16c | 633 | LP5523_EN_LEDTEST | i); |
2e4840ed SO |
634 | /* ADC conversion time is 2.7 ms typically */ |
635 | usleep_range(3000, 6000); | |
9ca3bd80 | 636 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
637 | if (ret < 0) |
638 | goto fail; | |
639 | ||
0efba16c | 640 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 641 | usleep_range(3000, 6000);/* Was not ready. Wait. */ |
9ca3bd80 MWK |
642 | |
643 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); | |
1b21ec5a JH |
644 | if (ret < 0) |
645 | goto fail; | |
0efba16c SO |
646 | |
647 | if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) | |
648 | pos += sprintf(buf + pos, "LED %d FAIL\n", i); | |
649 | ||
9ca3bd80 | 650 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00); |
0efba16c SO |
651 | |
652 | /* Restore current */ | |
9ca3bd80 MWK |
653 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
654 | led->led_current); | |
0efba16c SO |
655 | led++; |
656 | } | |
657 | if (pos == 0) | |
658 | pos = sprintf(buf, "OK\n"); | |
659 | goto release_lock; | |
660 | fail: | |
661 | pos = sprintf(buf, "FAIL\n"); | |
662 | ||
663 | release_lock: | |
664 | mutex_unlock(&chip->lock); | |
665 | ||
666 | return pos; | |
667 | } | |
668 | ||
0efba16c SO |
669 | static void lp5523_led_brightness_work(struct work_struct *work) |
670 | { | |
a6e4679a | 671 | struct lp55xx_led *led = container_of(work, struct lp55xx_led, |
0efba16c | 672 | brightness_work); |
a6e4679a | 673 | struct lp55xx_chip *chip = led->chip; |
0efba16c SO |
674 | |
675 | mutex_lock(&chip->lock); | |
a6e4679a | 676 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, |
0efba16c | 677 | led->brightness); |
0efba16c SO |
678 | mutex_unlock(&chip->lock); |
679 | } | |
680 | ||
45e611bf MK |
681 | static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode); |
682 | static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode); | |
683 | static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode); | |
684 | static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds); | |
685 | static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds); | |
686 | static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds); | |
687 | static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load); | |
688 | static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load); | |
689 | static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load); | |
690 | static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest); | |
0efba16c SO |
691 | |
692 | static struct attribute *lp5523_attributes[] = { | |
45e611bf MK |
693 | &dev_attr_engine1_mode.attr, |
694 | &dev_attr_engine2_mode.attr, | |
695 | &dev_attr_engine3_mode.attr, | |
696 | &dev_attr_engine1_load.attr, | |
697 | &dev_attr_engine2_load.attr, | |
698 | &dev_attr_engine3_load.attr, | |
699 | &dev_attr_engine1_leds.attr, | |
700 | &dev_attr_engine2_leds.attr, | |
701 | &dev_attr_engine3_leds.attr, | |
0efba16c | 702 | &dev_attr_selftest.attr, |
f1625842 | 703 | NULL, |
0efba16c SO |
704 | }; |
705 | ||
706 | static const struct attribute_group lp5523_group = { | |
707 | .attrs = lp5523_attributes, | |
708 | }; | |
709 | ||
48068d5d MWK |
710 | /* Chip specific configurations */ |
711 | static struct lp55xx_device_config lp5523_cfg = { | |
712 | .reset = { | |
713 | .addr = LP5523_REG_RESET, | |
714 | .val = LP5523_RESET, | |
715 | }, | |
e3a700d8 MWK |
716 | .enable = { |
717 | .addr = LP5523_REG_ENABLE, | |
718 | .val = LP5523_ENABLE, | |
719 | }, | |
0e202346 | 720 | .max_channel = LP5523_MAX_LEDS, |
ffbdccdb | 721 | .post_init_device = lp5523_post_init_device, |
a6e4679a | 722 | .brightness_work_fn = lp5523_led_brightness_work, |
a96bfa13 | 723 | .set_led_current = lp5523_set_led_current, |
db6eaf83 MWK |
724 | .firmware_cb = lp5523_firmware_loaded, |
725 | .run_engine = lp5523_run_engine, | |
e73c0ce6 | 726 | .dev_attr_group = &lp5523_group, |
48068d5d MWK |
727 | }; |
728 | ||
98ea1ea2 | 729 | static int lp5523_probe(struct i2c_client *client, |
0efba16c SO |
730 | const struct i2c_device_id *id) |
731 | { | |
22ebeb48 | 732 | int ret; |
6a0c9a47 MWK |
733 | struct lp55xx_chip *chip; |
734 | struct lp55xx_led *led; | |
7542a04b LW |
735 | struct lp55xx_platform_data *pdata; |
736 | struct device_node *np = client->dev.of_node; | |
737 | ||
87aae1ea | 738 | if (!dev_get_platdata(&client->dev)) { |
7542a04b LW |
739 | if (np) { |
740 | ret = lp55xx_of_populate_pdata(&client->dev, np); | |
741 | if (ret < 0) | |
742 | return ret; | |
743 | } else { | |
744 | dev_err(&client->dev, "no platform data\n"); | |
745 | return -EINVAL; | |
746 | } | |
0efba16c | 747 | } |
87aae1ea | 748 | pdata = dev_get_platdata(&client->dev); |
0efba16c | 749 | |
6a0c9a47 MWK |
750 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
751 | if (!chip) | |
752 | return -ENOMEM; | |
753 | ||
754 | led = devm_kzalloc(&client->dev, | |
755 | sizeof(*led) * pdata->num_channels, GFP_KERNEL); | |
756 | if (!led) | |
757 | return -ENOMEM; | |
758 | ||
759 | chip->cl = client; | |
760 | chip->pdata = pdata; | |
48068d5d | 761 | chip->cfg = &lp5523_cfg; |
6a0c9a47 MWK |
762 | |
763 | mutex_init(&chip->lock); | |
0efba16c | 764 | |
6a0c9a47 | 765 | i2c_set_clientdata(client, led); |
0efba16c | 766 | |
22ebeb48 | 767 | ret = lp55xx_init_device(chip); |
0efba16c | 768 | if (ret) |
f6c64c6f | 769 | goto err_init; |
0efba16c | 770 | |
56a1e9ad | 771 | dev_info(&client->dev, "%s Programmable led chip found\n", id->name); |
0efba16c | 772 | |
9e9b3db1 | 773 | ret = lp55xx_register_leds(led, chip); |
f6524808 | 774 | if (ret) |
9e9b3db1 | 775 | goto err_register_leds; |
0efba16c | 776 | |
e73c0ce6 | 777 | ret = lp55xx_register_sysfs(chip); |
0efba16c SO |
778 | if (ret) { |
779 | dev_err(&client->dev, "registering sysfs failed\n"); | |
e73c0ce6 | 780 | goto err_register_sysfs; |
0efba16c | 781 | } |
e73c0ce6 MWK |
782 | |
783 | return 0; | |
784 | ||
785 | err_register_sysfs: | |
c3a68ebf | 786 | lp55xx_unregister_leds(led, chip); |
9e9b3db1 | 787 | err_register_leds: |
6ce61762 | 788 | lp55xx_deinit_device(chip); |
f6c64c6f | 789 | err_init: |
0efba16c SO |
790 | return ret; |
791 | } | |
792 | ||
793 | static int lp5523_remove(struct i2c_client *client) | |
794 | { | |
6ce61762 MWK |
795 | struct lp55xx_led *led = i2c_get_clientdata(client); |
796 | struct lp55xx_chip *chip = led->chip; | |
0efba16c | 797 | |
28c9266b | 798 | lp5523_stop_all_engines(chip); |
87cc4bde | 799 | lp55xx_unregister_sysfs(chip); |
c3a68ebf | 800 | lp55xx_unregister_leds(led, chip); |
6ce61762 | 801 | lp55xx_deinit_device(chip); |
0efba16c | 802 | |
0efba16c SO |
803 | return 0; |
804 | } | |
805 | ||
806 | static const struct i2c_device_id lp5523_id[] = { | |
27d7704e KM |
807 | { "lp5523", LP5523 }, |
808 | { "lp55231", LP55231 }, | |
0efba16c SO |
809 | { } |
810 | }; | |
811 | ||
812 | MODULE_DEVICE_TABLE(i2c, lp5523_id); | |
813 | ||
33c88b67 AL |
814 | #ifdef CONFIG_OF |
815 | static const struct of_device_id of_lp5523_leds_match[] = { | |
816 | { .compatible = "national,lp5523", }, | |
817 | {}, | |
818 | }; | |
819 | ||
820 | MODULE_DEVICE_TABLE(of, of_lp5523_leds_match); | |
821 | #endif | |
822 | ||
0efba16c SO |
823 | static struct i2c_driver lp5523_driver = { |
824 | .driver = { | |
27d7704e | 825 | .name = "lp5523x", |
33c88b67 | 826 | .of_match_table = of_match_ptr(of_lp5523_leds_match), |
0efba16c SO |
827 | }, |
828 | .probe = lp5523_probe, | |
829 | .remove = lp5523_remove, | |
830 | .id_table = lp5523_id, | |
831 | }; | |
832 | ||
09a0d183 | 833 | module_i2c_driver(lp5523_driver); |
0efba16c SO |
834 | |
835 | MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>"); | |
a2387cb9 | 836 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
0efba16c SO |
837 | MODULE_DESCRIPTION("LP5523 LED engine"); |
838 | MODULE_LICENSE("GPL"); |