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