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ee378a5c ID |
1 | /* |
2 | * S6E63M0 AMOLED LCD panel driver. | |
3 | * | |
4 | * Author: InKi Dae <inki.dae@samsung.com> | |
5 | * | |
6 | * Derived from drivers/video/omap/lcd-apollon.c | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <linux/wait.h> | |
24 | #include <linux/fb.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/gpio.h> | |
27 | #include <linux/spi/spi.h> | |
28 | #include <linux/irq.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/lcd.h> | |
32 | #include <linux/backlight.h> | |
355b200b | 33 | #include <linux/module.h> |
ee378a5c ID |
34 | |
35 | #include "s6e63m0_gamma.h" | |
36 | ||
37 | #define SLEEPMSEC 0x1000 | |
38 | #define ENDDEF 0x2000 | |
39 | #define DEFMASK 0xFF00 | |
40 | #define COMMAND_ONLY 0xFE | |
41 | #define DATA_ONLY 0xFF | |
42 | ||
43 | #define MIN_BRIGHTNESS 0 | |
44 | #define MAX_BRIGHTNESS 10 | |
45 | ||
46 | #define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) | |
47 | ||
48 | struct s6e63m0 { | |
49 | struct device *dev; | |
50 | struct spi_device *spi; | |
51 | unsigned int power; | |
52 | unsigned int current_brightness; | |
53 | unsigned int gamma_mode; | |
54 | unsigned int gamma_table_count; | |
55 | struct lcd_device *ld; | |
56 | struct backlight_device *bd; | |
57 | struct lcd_platform_data *lcd_pd; | |
58 | }; | |
59 | ||
60 | static const unsigned short SEQ_PANEL_CONDITION_SET[] = { | |
61 | 0xF8, 0x01, | |
62 | DATA_ONLY, 0x27, | |
63 | DATA_ONLY, 0x27, | |
64 | DATA_ONLY, 0x07, | |
65 | DATA_ONLY, 0x07, | |
66 | DATA_ONLY, 0x54, | |
67 | DATA_ONLY, 0x9f, | |
68 | DATA_ONLY, 0x63, | |
69 | DATA_ONLY, 0x86, | |
70 | DATA_ONLY, 0x1a, | |
71 | DATA_ONLY, 0x33, | |
72 | DATA_ONLY, 0x0d, | |
73 | DATA_ONLY, 0x00, | |
74 | DATA_ONLY, 0x00, | |
75 | ||
76 | ENDDEF, 0x0000 | |
77 | }; | |
78 | ||
79 | static const unsigned short SEQ_DISPLAY_CONDITION_SET[] = { | |
80 | 0xf2, 0x02, | |
81 | DATA_ONLY, 0x03, | |
82 | DATA_ONLY, 0x1c, | |
83 | DATA_ONLY, 0x10, | |
84 | DATA_ONLY, 0x10, | |
85 | ||
86 | 0xf7, 0x03, | |
87 | DATA_ONLY, 0x00, | |
88 | DATA_ONLY, 0x00, | |
89 | ||
90 | ENDDEF, 0x0000 | |
91 | }; | |
92 | ||
93 | static const unsigned short SEQ_GAMMA_SETTING[] = { | |
94 | 0xfa, 0x00, | |
95 | DATA_ONLY, 0x18, | |
96 | DATA_ONLY, 0x08, | |
97 | DATA_ONLY, 0x24, | |
98 | DATA_ONLY, 0x64, | |
99 | DATA_ONLY, 0x56, | |
100 | DATA_ONLY, 0x33, | |
101 | DATA_ONLY, 0xb6, | |
102 | DATA_ONLY, 0xba, | |
103 | DATA_ONLY, 0xa8, | |
104 | DATA_ONLY, 0xac, | |
105 | DATA_ONLY, 0xb1, | |
106 | DATA_ONLY, 0x9d, | |
107 | DATA_ONLY, 0xc1, | |
108 | DATA_ONLY, 0xc1, | |
109 | DATA_ONLY, 0xb7, | |
110 | DATA_ONLY, 0x00, | |
111 | DATA_ONLY, 0x9c, | |
112 | DATA_ONLY, 0x00, | |
113 | DATA_ONLY, 0x9f, | |
114 | DATA_ONLY, 0x00, | |
115 | DATA_ONLY, 0xd6, | |
116 | ||
117 | 0xfa, 0x01, | |
118 | ||
119 | ENDDEF, 0x0000 | |
120 | }; | |
121 | ||
122 | static const unsigned short SEQ_ETC_CONDITION_SET[] = { | |
123 | 0xf6, 0x00, | |
124 | DATA_ONLY, 0x8c, | |
125 | DATA_ONLY, 0x07, | |
126 | ||
127 | 0xb3, 0xc, | |
128 | ||
129 | 0xb5, 0x2c, | |
130 | DATA_ONLY, 0x12, | |
131 | DATA_ONLY, 0x0c, | |
132 | DATA_ONLY, 0x0a, | |
133 | DATA_ONLY, 0x10, | |
134 | DATA_ONLY, 0x0e, | |
135 | DATA_ONLY, 0x17, | |
136 | DATA_ONLY, 0x13, | |
137 | DATA_ONLY, 0x1f, | |
138 | DATA_ONLY, 0x1a, | |
139 | DATA_ONLY, 0x2a, | |
140 | DATA_ONLY, 0x24, | |
141 | DATA_ONLY, 0x1f, | |
142 | DATA_ONLY, 0x1b, | |
143 | DATA_ONLY, 0x1a, | |
144 | DATA_ONLY, 0x17, | |
145 | ||
146 | DATA_ONLY, 0x2b, | |
147 | DATA_ONLY, 0x26, | |
148 | DATA_ONLY, 0x22, | |
149 | DATA_ONLY, 0x20, | |
150 | DATA_ONLY, 0x3a, | |
151 | DATA_ONLY, 0x34, | |
152 | DATA_ONLY, 0x30, | |
153 | DATA_ONLY, 0x2c, | |
154 | DATA_ONLY, 0x29, | |
155 | DATA_ONLY, 0x26, | |
156 | DATA_ONLY, 0x25, | |
157 | DATA_ONLY, 0x23, | |
158 | DATA_ONLY, 0x21, | |
159 | DATA_ONLY, 0x20, | |
160 | DATA_ONLY, 0x1e, | |
161 | DATA_ONLY, 0x1e, | |
162 | ||
163 | 0xb6, 0x00, | |
164 | DATA_ONLY, 0x00, | |
165 | DATA_ONLY, 0x11, | |
166 | DATA_ONLY, 0x22, | |
167 | DATA_ONLY, 0x33, | |
168 | DATA_ONLY, 0x44, | |
169 | DATA_ONLY, 0x44, | |
170 | DATA_ONLY, 0x44, | |
171 | ||
172 | DATA_ONLY, 0x55, | |
173 | DATA_ONLY, 0x55, | |
174 | DATA_ONLY, 0x66, | |
175 | DATA_ONLY, 0x66, | |
176 | DATA_ONLY, 0x66, | |
177 | DATA_ONLY, 0x66, | |
178 | DATA_ONLY, 0x66, | |
179 | DATA_ONLY, 0x66, | |
180 | ||
181 | 0xb7, 0x2c, | |
182 | DATA_ONLY, 0x12, | |
183 | DATA_ONLY, 0x0c, | |
184 | DATA_ONLY, 0x0a, | |
185 | DATA_ONLY, 0x10, | |
186 | DATA_ONLY, 0x0e, | |
187 | DATA_ONLY, 0x17, | |
188 | DATA_ONLY, 0x13, | |
189 | DATA_ONLY, 0x1f, | |
190 | DATA_ONLY, 0x1a, | |
191 | DATA_ONLY, 0x2a, | |
192 | DATA_ONLY, 0x24, | |
193 | DATA_ONLY, 0x1f, | |
194 | DATA_ONLY, 0x1b, | |
195 | DATA_ONLY, 0x1a, | |
196 | DATA_ONLY, 0x17, | |
197 | ||
198 | DATA_ONLY, 0x2b, | |
199 | DATA_ONLY, 0x26, | |
200 | DATA_ONLY, 0x22, | |
201 | DATA_ONLY, 0x20, | |
202 | DATA_ONLY, 0x3a, | |
203 | DATA_ONLY, 0x34, | |
204 | DATA_ONLY, 0x30, | |
205 | DATA_ONLY, 0x2c, | |
206 | DATA_ONLY, 0x29, | |
207 | DATA_ONLY, 0x26, | |
208 | DATA_ONLY, 0x25, | |
209 | DATA_ONLY, 0x23, | |
210 | DATA_ONLY, 0x21, | |
211 | DATA_ONLY, 0x20, | |
212 | DATA_ONLY, 0x1e, | |
213 | DATA_ONLY, 0x1e, | |
214 | ||
215 | 0xb8, 0x00, | |
216 | DATA_ONLY, 0x00, | |
217 | DATA_ONLY, 0x11, | |
218 | DATA_ONLY, 0x22, | |
219 | DATA_ONLY, 0x33, | |
220 | DATA_ONLY, 0x44, | |
221 | DATA_ONLY, 0x44, | |
222 | DATA_ONLY, 0x44, | |
223 | ||
224 | DATA_ONLY, 0x55, | |
225 | DATA_ONLY, 0x55, | |
226 | DATA_ONLY, 0x66, | |
227 | DATA_ONLY, 0x66, | |
228 | DATA_ONLY, 0x66, | |
229 | DATA_ONLY, 0x66, | |
230 | DATA_ONLY, 0x66, | |
231 | DATA_ONLY, 0x66, | |
232 | ||
233 | 0xb9, 0x2c, | |
234 | DATA_ONLY, 0x12, | |
235 | DATA_ONLY, 0x0c, | |
236 | DATA_ONLY, 0x0a, | |
237 | DATA_ONLY, 0x10, | |
238 | DATA_ONLY, 0x0e, | |
239 | DATA_ONLY, 0x17, | |
240 | DATA_ONLY, 0x13, | |
241 | DATA_ONLY, 0x1f, | |
242 | DATA_ONLY, 0x1a, | |
243 | DATA_ONLY, 0x2a, | |
244 | DATA_ONLY, 0x24, | |
245 | DATA_ONLY, 0x1f, | |
246 | DATA_ONLY, 0x1b, | |
247 | DATA_ONLY, 0x1a, | |
248 | DATA_ONLY, 0x17, | |
249 | ||
250 | DATA_ONLY, 0x2b, | |
251 | DATA_ONLY, 0x26, | |
252 | DATA_ONLY, 0x22, | |
253 | DATA_ONLY, 0x20, | |
254 | DATA_ONLY, 0x3a, | |
255 | DATA_ONLY, 0x34, | |
256 | DATA_ONLY, 0x30, | |
257 | DATA_ONLY, 0x2c, | |
258 | DATA_ONLY, 0x29, | |
259 | DATA_ONLY, 0x26, | |
260 | DATA_ONLY, 0x25, | |
261 | DATA_ONLY, 0x23, | |
262 | DATA_ONLY, 0x21, | |
263 | DATA_ONLY, 0x20, | |
264 | DATA_ONLY, 0x1e, | |
265 | DATA_ONLY, 0x1e, | |
266 | ||
267 | 0xba, 0x00, | |
268 | DATA_ONLY, 0x00, | |
269 | DATA_ONLY, 0x11, | |
270 | DATA_ONLY, 0x22, | |
271 | DATA_ONLY, 0x33, | |
272 | DATA_ONLY, 0x44, | |
273 | DATA_ONLY, 0x44, | |
274 | DATA_ONLY, 0x44, | |
275 | ||
276 | DATA_ONLY, 0x55, | |
277 | DATA_ONLY, 0x55, | |
278 | DATA_ONLY, 0x66, | |
279 | DATA_ONLY, 0x66, | |
280 | DATA_ONLY, 0x66, | |
281 | DATA_ONLY, 0x66, | |
282 | DATA_ONLY, 0x66, | |
283 | DATA_ONLY, 0x66, | |
284 | ||
285 | 0xc1, 0x4d, | |
286 | DATA_ONLY, 0x96, | |
287 | DATA_ONLY, 0x1d, | |
288 | DATA_ONLY, 0x00, | |
289 | DATA_ONLY, 0x00, | |
290 | DATA_ONLY, 0x01, | |
291 | DATA_ONLY, 0xdf, | |
292 | DATA_ONLY, 0x00, | |
293 | DATA_ONLY, 0x00, | |
294 | DATA_ONLY, 0x03, | |
295 | DATA_ONLY, 0x1f, | |
296 | DATA_ONLY, 0x00, | |
297 | DATA_ONLY, 0x00, | |
298 | DATA_ONLY, 0x00, | |
299 | DATA_ONLY, 0x00, | |
300 | DATA_ONLY, 0x00, | |
301 | DATA_ONLY, 0x00, | |
302 | DATA_ONLY, 0x00, | |
303 | DATA_ONLY, 0x00, | |
304 | DATA_ONLY, 0x03, | |
305 | DATA_ONLY, 0x06, | |
306 | DATA_ONLY, 0x09, | |
307 | DATA_ONLY, 0x0d, | |
308 | DATA_ONLY, 0x0f, | |
309 | DATA_ONLY, 0x12, | |
310 | DATA_ONLY, 0x15, | |
311 | DATA_ONLY, 0x18, | |
312 | ||
313 | 0xb2, 0x10, | |
314 | DATA_ONLY, 0x10, | |
315 | DATA_ONLY, 0x0b, | |
316 | DATA_ONLY, 0x05, | |
317 | ||
318 | ENDDEF, 0x0000 | |
319 | }; | |
320 | ||
321 | static const unsigned short SEQ_ACL_ON[] = { | |
322 | /* ACL on */ | |
323 | 0xc0, 0x01, | |
324 | ||
325 | ENDDEF, 0x0000 | |
326 | }; | |
327 | ||
328 | static const unsigned short SEQ_ACL_OFF[] = { | |
329 | /* ACL off */ | |
330 | 0xc0, 0x00, | |
331 | ||
332 | ENDDEF, 0x0000 | |
333 | }; | |
334 | ||
335 | static const unsigned short SEQ_ELVSS_ON[] = { | |
336 | /* ELVSS on */ | |
337 | 0xb1, 0x0b, | |
338 | ||
339 | ENDDEF, 0x0000 | |
340 | }; | |
341 | ||
342 | static const unsigned short SEQ_ELVSS_OFF[] = { | |
343 | /* ELVSS off */ | |
344 | 0xb1, 0x0a, | |
345 | ||
346 | ENDDEF, 0x0000 | |
347 | }; | |
348 | ||
349 | static const unsigned short SEQ_STAND_BY_OFF[] = { | |
350 | 0x11, COMMAND_ONLY, | |
351 | ||
352 | ENDDEF, 0x0000 | |
353 | }; | |
354 | ||
355 | static const unsigned short SEQ_STAND_BY_ON[] = { | |
356 | 0x10, COMMAND_ONLY, | |
357 | ||
358 | ENDDEF, 0x0000 | |
359 | }; | |
360 | ||
361 | static const unsigned short SEQ_DISPLAY_ON[] = { | |
362 | 0x29, COMMAND_ONLY, | |
363 | ||
364 | ENDDEF, 0x0000 | |
365 | }; | |
366 | ||
367 | ||
368 | static int s6e63m0_spi_write_byte(struct s6e63m0 *lcd, int addr, int data) | |
369 | { | |
370 | u16 buf[1]; | |
371 | struct spi_message msg; | |
372 | ||
373 | struct spi_transfer xfer = { | |
374 | .len = 2, | |
375 | .tx_buf = buf, | |
376 | }; | |
377 | ||
378 | buf[0] = (addr << 8) | data; | |
379 | ||
380 | spi_message_init(&msg); | |
381 | spi_message_add_tail(&xfer, &msg); | |
382 | ||
383 | return spi_sync(lcd->spi, &msg); | |
384 | } | |
385 | ||
386 | static int s6e63m0_spi_write(struct s6e63m0 *lcd, unsigned char address, | |
387 | unsigned char command) | |
388 | { | |
389 | int ret = 0; | |
390 | ||
391 | if (address != DATA_ONLY) | |
392 | ret = s6e63m0_spi_write_byte(lcd, 0x0, address); | |
393 | if (command != COMMAND_ONLY) | |
394 | ret = s6e63m0_spi_write_byte(lcd, 0x1, command); | |
395 | ||
396 | return ret; | |
397 | } | |
398 | ||
399 | static int s6e63m0_panel_send_sequence(struct s6e63m0 *lcd, | |
400 | const unsigned short *wbuf) | |
401 | { | |
402 | int ret = 0, i = 0; | |
403 | ||
404 | while ((wbuf[i] & DEFMASK) != ENDDEF) { | |
405 | if ((wbuf[i] & DEFMASK) != SLEEPMSEC) { | |
406 | ret = s6e63m0_spi_write(lcd, wbuf[i], wbuf[i+1]); | |
407 | if (ret) | |
408 | break; | |
409 | } else | |
410 | udelay(wbuf[i+1]*1000); | |
411 | i += 2; | |
412 | } | |
413 | ||
414 | return ret; | |
415 | } | |
416 | ||
417 | static int _s6e63m0_gamma_ctl(struct s6e63m0 *lcd, const unsigned int *gamma) | |
418 | { | |
419 | unsigned int i = 0; | |
420 | int ret = 0; | |
421 | ||
422 | /* disable gamma table updating. */ | |
423 | ret = s6e63m0_spi_write(lcd, 0xfa, 0x00); | |
424 | if (ret) { | |
425 | dev_err(lcd->dev, "failed to disable gamma table updating.\n"); | |
426 | goto gamma_err; | |
427 | } | |
428 | ||
429 | for (i = 0 ; i < GAMMA_TABLE_COUNT; i++) { | |
430 | ret = s6e63m0_spi_write(lcd, DATA_ONLY, gamma[i]); | |
431 | if (ret) { | |
432 | dev_err(lcd->dev, "failed to set gamma table.\n"); | |
433 | goto gamma_err; | |
434 | } | |
435 | } | |
436 | ||
437 | /* update gamma table. */ | |
438 | ret = s6e63m0_spi_write(lcd, 0xfa, 0x01); | |
439 | if (ret) | |
440 | dev_err(lcd->dev, "failed to update gamma table.\n"); | |
441 | ||
442 | gamma_err: | |
443 | return ret; | |
444 | } | |
445 | ||
446 | static int s6e63m0_gamma_ctl(struct s6e63m0 *lcd, int gamma) | |
447 | { | |
448 | int ret = 0; | |
449 | ||
450 | ret = _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]); | |
451 | ||
452 | return ret; | |
453 | } | |
454 | ||
455 | ||
456 | static int s6e63m0_ldi_init(struct s6e63m0 *lcd) | |
457 | { | |
458 | int ret, i; | |
459 | const unsigned short *init_seq[] = { | |
460 | SEQ_PANEL_CONDITION_SET, | |
461 | SEQ_DISPLAY_CONDITION_SET, | |
462 | SEQ_GAMMA_SETTING, | |
463 | SEQ_ETC_CONDITION_SET, | |
464 | SEQ_ACL_ON, | |
465 | SEQ_ELVSS_ON, | |
466 | }; | |
467 | ||
468 | for (i = 0; i < ARRAY_SIZE(init_seq); i++) { | |
469 | ret = s6e63m0_panel_send_sequence(lcd, init_seq[i]); | |
470 | if (ret) | |
471 | break; | |
472 | } | |
473 | ||
474 | return ret; | |
475 | } | |
476 | ||
477 | static int s6e63m0_ldi_enable(struct s6e63m0 *lcd) | |
478 | { | |
479 | int ret = 0, i; | |
480 | const unsigned short *enable_seq[] = { | |
481 | SEQ_STAND_BY_OFF, | |
482 | SEQ_DISPLAY_ON, | |
483 | }; | |
484 | ||
485 | for (i = 0; i < ARRAY_SIZE(enable_seq); i++) { | |
486 | ret = s6e63m0_panel_send_sequence(lcd, enable_seq[i]); | |
487 | if (ret) | |
488 | break; | |
489 | } | |
490 | ||
491 | return ret; | |
492 | } | |
493 | ||
494 | static int s6e63m0_ldi_disable(struct s6e63m0 *lcd) | |
495 | { | |
496 | int ret; | |
497 | ||
498 | ret = s6e63m0_panel_send_sequence(lcd, SEQ_STAND_BY_ON); | |
499 | ||
500 | return ret; | |
501 | } | |
502 | ||
503 | static int s6e63m0_power_on(struct s6e63m0 *lcd) | |
504 | { | |
505 | int ret = 0; | |
506 | struct lcd_platform_data *pd = NULL; | |
507 | struct backlight_device *bd = NULL; | |
508 | ||
509 | pd = lcd->lcd_pd; | |
510 | if (!pd) { | |
511 | dev_err(lcd->dev, "platform data is NULL.\n"); | |
512 | return -EFAULT; | |
513 | } | |
514 | ||
515 | bd = lcd->bd; | |
516 | if (!bd) { | |
517 | dev_err(lcd->dev, "backlight device is NULL.\n"); | |
518 | return -EFAULT; | |
519 | } | |
520 | ||
521 | if (!pd->power_on) { | |
522 | dev_err(lcd->dev, "power_on is NULL.\n"); | |
523 | return -EFAULT; | |
524 | } else { | |
525 | pd->power_on(lcd->ld, 1); | |
526 | mdelay(pd->power_on_delay); | |
527 | } | |
528 | ||
529 | if (!pd->reset) { | |
530 | dev_err(lcd->dev, "reset is NULL.\n"); | |
531 | return -EFAULT; | |
532 | } else { | |
533 | pd->reset(lcd->ld); | |
534 | mdelay(pd->reset_delay); | |
535 | } | |
536 | ||
537 | ret = s6e63m0_ldi_init(lcd); | |
538 | if (ret) { | |
539 | dev_err(lcd->dev, "failed to initialize ldi.\n"); | |
540 | return ret; | |
541 | } | |
542 | ||
543 | ret = s6e63m0_ldi_enable(lcd); | |
544 | if (ret) { | |
545 | dev_err(lcd->dev, "failed to enable ldi.\n"); | |
546 | return ret; | |
547 | } | |
548 | ||
549 | /* set brightness to current value after power on or resume. */ | |
550 | ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness); | |
551 | if (ret) { | |
552 | dev_err(lcd->dev, "lcd gamma setting failed.\n"); | |
553 | return ret; | |
554 | } | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static int s6e63m0_power_off(struct s6e63m0 *lcd) | |
560 | { | |
561 | int ret = 0; | |
562 | struct lcd_platform_data *pd = NULL; | |
563 | ||
564 | pd = lcd->lcd_pd; | |
565 | if (!pd) { | |
566 | dev_err(lcd->dev, "platform data is NULL.\n"); | |
567 | return -EFAULT; | |
568 | } | |
569 | ||
570 | ret = s6e63m0_ldi_disable(lcd); | |
571 | if (ret) { | |
572 | dev_err(lcd->dev, "lcd setting failed.\n"); | |
573 | return -EIO; | |
574 | } | |
575 | ||
576 | mdelay(pd->power_off_delay); | |
577 | ||
578 | if (!pd->power_on) { | |
579 | dev_err(lcd->dev, "power_on is NULL.\n"); | |
580 | return -EFAULT; | |
581 | } else | |
582 | pd->power_on(lcd->ld, 0); | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | static int s6e63m0_power(struct s6e63m0 *lcd, int power) | |
588 | { | |
589 | int ret = 0; | |
590 | ||
591 | if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) | |
592 | ret = s6e63m0_power_on(lcd); | |
593 | else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) | |
594 | ret = s6e63m0_power_off(lcd); | |
595 | ||
596 | if (!ret) | |
597 | lcd->power = power; | |
598 | ||
599 | return ret; | |
600 | } | |
601 | ||
602 | static int s6e63m0_set_power(struct lcd_device *ld, int power) | |
603 | { | |
604 | struct s6e63m0 *lcd = lcd_get_data(ld); | |
605 | ||
606 | if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN && | |
607 | power != FB_BLANK_NORMAL) { | |
608 | dev_err(lcd->dev, "power value should be 0, 1 or 4.\n"); | |
609 | return -EINVAL; | |
610 | } | |
611 | ||
612 | return s6e63m0_power(lcd, power); | |
613 | } | |
614 | ||
615 | static int s6e63m0_get_power(struct lcd_device *ld) | |
616 | { | |
617 | struct s6e63m0 *lcd = lcd_get_data(ld); | |
618 | ||
619 | return lcd->power; | |
620 | } | |
621 | ||
622 | static int s6e63m0_get_brightness(struct backlight_device *bd) | |
623 | { | |
624 | return bd->props.brightness; | |
625 | } | |
626 | ||
627 | static int s6e63m0_set_brightness(struct backlight_device *bd) | |
628 | { | |
629 | int ret = 0, brightness = bd->props.brightness; | |
630 | struct s6e63m0 *lcd = bl_get_data(bd); | |
631 | ||
632 | if (brightness < MIN_BRIGHTNESS || | |
633 | brightness > bd->props.max_brightness) { | |
634 | dev_err(&bd->dev, "lcd brightness should be %d to %d.\n", | |
635 | MIN_BRIGHTNESS, MAX_BRIGHTNESS); | |
636 | return -EINVAL; | |
637 | } | |
638 | ||
639 | ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness); | |
640 | if (ret) { | |
641 | dev_err(&bd->dev, "lcd brightness setting failed.\n"); | |
642 | return -EIO; | |
643 | } | |
644 | ||
645 | return ret; | |
646 | } | |
647 | ||
648 | static struct lcd_ops s6e63m0_lcd_ops = { | |
649 | .set_power = s6e63m0_set_power, | |
650 | .get_power = s6e63m0_get_power, | |
651 | }; | |
652 | ||
653 | static const struct backlight_ops s6e63m0_backlight_ops = { | |
654 | .get_brightness = s6e63m0_get_brightness, | |
655 | .update_status = s6e63m0_set_brightness, | |
656 | }; | |
657 | ||
658 | static ssize_t s6e63m0_sysfs_show_gamma_mode(struct device *dev, | |
659 | struct device_attribute *attr, char *buf) | |
660 | { | |
661 | struct s6e63m0 *lcd = dev_get_drvdata(dev); | |
662 | char temp[10]; | |
663 | ||
664 | switch (lcd->gamma_mode) { | |
665 | case 0: | |
666 | sprintf(temp, "2.2 mode\n"); | |
667 | strcat(buf, temp); | |
668 | break; | |
669 | case 1: | |
670 | sprintf(temp, "1.9 mode\n"); | |
671 | strcat(buf, temp); | |
672 | break; | |
673 | case 2: | |
674 | sprintf(temp, "1.7 mode\n"); | |
675 | strcat(buf, temp); | |
676 | break; | |
677 | default: | |
678 | dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7)n"); | |
679 | break; | |
680 | } | |
681 | ||
682 | return strlen(buf); | |
683 | } | |
684 | ||
685 | static ssize_t s6e63m0_sysfs_store_gamma_mode(struct device *dev, | |
686 | struct device_attribute *attr, | |
687 | const char *buf, size_t len) | |
688 | { | |
689 | struct s6e63m0 *lcd = dev_get_drvdata(dev); | |
690 | struct backlight_device *bd = NULL; | |
691 | int brightness, rc; | |
692 | ||
cf2b94da | 693 | rc = kstrtouint(buf, 0, &lcd->gamma_mode); |
ee378a5c ID |
694 | if (rc < 0) |
695 | return rc; | |
696 | ||
697 | bd = lcd->bd; | |
698 | ||
699 | brightness = bd->props.brightness; | |
700 | ||
701 | switch (lcd->gamma_mode) { | |
702 | case 0: | |
703 | _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]); | |
704 | break; | |
705 | case 1: | |
706 | _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_19_table[brightness]); | |
707 | break; | |
708 | case 2: | |
709 | _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_17_table[brightness]); | |
710 | break; | |
711 | default: | |
712 | dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7\n"); | |
713 | _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]); | |
714 | break; | |
715 | } | |
716 | return len; | |
717 | } | |
718 | ||
719 | static DEVICE_ATTR(gamma_mode, 0644, | |
720 | s6e63m0_sysfs_show_gamma_mode, s6e63m0_sysfs_store_gamma_mode); | |
721 | ||
722 | static ssize_t s6e63m0_sysfs_show_gamma_table(struct device *dev, | |
723 | struct device_attribute *attr, char *buf) | |
724 | { | |
725 | struct s6e63m0 *lcd = dev_get_drvdata(dev); | |
726 | char temp[3]; | |
727 | ||
728 | sprintf(temp, "%d\n", lcd->gamma_table_count); | |
729 | strcpy(buf, temp); | |
730 | ||
731 | return strlen(buf); | |
732 | } | |
ed3a6787 | 733 | static DEVICE_ATTR(gamma_table, 0444, |
ee378a5c ID |
734 | s6e63m0_sysfs_show_gamma_table, NULL); |
735 | ||
a1025e22 | 736 | static int __devinit s6e63m0_probe(struct spi_device *spi) |
ee378a5c ID |
737 | { |
738 | int ret = 0; | |
739 | struct s6e63m0 *lcd = NULL; | |
740 | struct lcd_device *ld = NULL; | |
741 | struct backlight_device *bd = NULL; | |
ef22f6a7 | 742 | struct backlight_properties props; |
ee378a5c | 743 | |
541f936f | 744 | lcd = devm_kzalloc(&spi->dev, sizeof(struct s6e63m0), GFP_KERNEL); |
ee378a5c ID |
745 | if (!lcd) |
746 | return -ENOMEM; | |
747 | ||
748 | /* s6e63m0 lcd panel uses 3-wire 9bits SPI Mode. */ | |
749 | spi->bits_per_word = 9; | |
750 | ||
751 | ret = spi_setup(spi); | |
752 | if (ret < 0) { | |
753 | dev_err(&spi->dev, "spi setup failed.\n"); | |
541f936f | 754 | return ret; |
ee378a5c ID |
755 | } |
756 | ||
757 | lcd->spi = spi; | |
758 | lcd->dev = &spi->dev; | |
759 | ||
760 | lcd->lcd_pd = (struct lcd_platform_data *)spi->dev.platform_data; | |
761 | if (!lcd->lcd_pd) { | |
762 | dev_err(&spi->dev, "platform data is NULL.\n"); | |
541f936f | 763 | return -EFAULT; |
ee378a5c ID |
764 | } |
765 | ||
766 | ld = lcd_device_register("s6e63m0", &spi->dev, lcd, &s6e63m0_lcd_ops); | |
541f936f JH |
767 | if (IS_ERR(ld)) |
768 | return PTR_ERR(ld); | |
ee378a5c ID |
769 | |
770 | lcd->ld = ld; | |
771 | ||
ef22f6a7 AL |
772 | memset(&props, 0, sizeof(struct backlight_properties)); |
773 | props.type = BACKLIGHT_RAW; | |
774 | props.max_brightness = MAX_BRIGHTNESS; | |
775 | ||
ee378a5c | 776 | bd = backlight_device_register("s6e63m0bl-bl", &spi->dev, lcd, |
ef22f6a7 | 777 | &s6e63m0_backlight_ops, &props); |
ee378a5c ID |
778 | if (IS_ERR(bd)) { |
779 | ret = PTR_ERR(bd); | |
780 | goto out_lcd_unregister; | |
781 | } | |
782 | ||
ee378a5c ID |
783 | bd->props.brightness = MAX_BRIGHTNESS; |
784 | lcd->bd = bd; | |
785 | ||
786 | /* | |
787 | * it gets gamma table count available so it gets user | |
788 | * know that. | |
789 | */ | |
790 | lcd->gamma_table_count = | |
791 | sizeof(gamma_table) / (MAX_GAMMA_LEVEL * sizeof(int)); | |
792 | ||
793 | ret = device_create_file(&(spi->dev), &dev_attr_gamma_mode); | |
794 | if (ret < 0) | |
795 | dev_err(&(spi->dev), "failed to add sysfs entries\n"); | |
796 | ||
797 | ret = device_create_file(&(spi->dev), &dev_attr_gamma_table); | |
798 | if (ret < 0) | |
799 | dev_err(&(spi->dev), "failed to add sysfs entries\n"); | |
800 | ||
801 | /* | |
802 | * if lcd panel was on from bootloader like u-boot then | |
803 | * do not lcd on. | |
804 | */ | |
805 | if (!lcd->lcd_pd->lcd_enabled) { | |
806 | /* | |
807 | * if lcd panel was off from bootloader then | |
808 | * current lcd status is powerdown and then | |
809 | * it enables lcd panel. | |
810 | */ | |
811 | lcd->power = FB_BLANK_POWERDOWN; | |
812 | ||
813 | s6e63m0_power(lcd, FB_BLANK_UNBLANK); | |
814 | } else | |
815 | lcd->power = FB_BLANK_UNBLANK; | |
816 | ||
817 | dev_set_drvdata(&spi->dev, lcd); | |
818 | ||
819 | dev_info(&spi->dev, "s6e63m0 panel driver has been probed.\n"); | |
820 | ||
821 | return 0; | |
822 | ||
823 | out_lcd_unregister: | |
824 | lcd_device_unregister(ld); | |
ee378a5c ID |
825 | return ret; |
826 | } | |
827 | ||
828 | static int __devexit s6e63m0_remove(struct spi_device *spi) | |
829 | { | |
830 | struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev); | |
831 | ||
832 | s6e63m0_power(lcd, FB_BLANK_POWERDOWN); | |
d974e00b AL |
833 | device_remove_file(&spi->dev, &dev_attr_gamma_table); |
834 | device_remove_file(&spi->dev, &dev_attr_gamma_mode); | |
835 | backlight_device_unregister(lcd->bd); | |
ee378a5c | 836 | lcd_device_unregister(lcd->ld); |
ee378a5c ID |
837 | |
838 | return 0; | |
839 | } | |
840 | ||
841 | #if defined(CONFIG_PM) | |
a4c8aaa5 | 842 | static unsigned int before_power; |
ee378a5c ID |
843 | |
844 | static int s6e63m0_suspend(struct spi_device *spi, pm_message_t mesg) | |
845 | { | |
846 | int ret = 0; | |
847 | struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev); | |
848 | ||
849 | dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power); | |
850 | ||
851 | before_power = lcd->power; | |
852 | ||
853 | /* | |
854 | * when lcd panel is suspend, lcd panel becomes off | |
855 | * regardless of status. | |
856 | */ | |
857 | ret = s6e63m0_power(lcd, FB_BLANK_POWERDOWN); | |
858 | ||
859 | return ret; | |
860 | } | |
861 | ||
862 | static int s6e63m0_resume(struct spi_device *spi) | |
863 | { | |
864 | int ret = 0; | |
865 | struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev); | |
866 | ||
867 | /* | |
868 | * after suspended, if lcd panel status is FB_BLANK_UNBLANK | |
869 | * (at that time, before_power is FB_BLANK_UNBLANK) then | |
870 | * it changes that status to FB_BLANK_POWERDOWN to get lcd on. | |
871 | */ | |
872 | if (before_power == FB_BLANK_UNBLANK) | |
873 | lcd->power = FB_BLANK_POWERDOWN; | |
874 | ||
875 | dev_dbg(&spi->dev, "before_power = %d\n", before_power); | |
876 | ||
877 | ret = s6e63m0_power(lcd, before_power); | |
878 | ||
879 | return ret; | |
880 | } | |
881 | #else | |
882 | #define s6e63m0_suspend NULL | |
883 | #define s6e63m0_resume NULL | |
884 | #endif | |
885 | ||
886 | /* Power down all displays on reboot, poweroff or halt. */ | |
887 | static void s6e63m0_shutdown(struct spi_device *spi) | |
888 | { | |
889 | struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev); | |
890 | ||
891 | s6e63m0_power(lcd, FB_BLANK_POWERDOWN); | |
892 | } | |
893 | ||
894 | static struct spi_driver s6e63m0_driver = { | |
895 | .driver = { | |
896 | .name = "s6e63m0", | |
ee378a5c ID |
897 | .owner = THIS_MODULE, |
898 | }, | |
899 | .probe = s6e63m0_probe, | |
d1723fa2 | 900 | .remove = s6e63m0_remove, |
ee378a5c ID |
901 | .shutdown = s6e63m0_shutdown, |
902 | .suspend = s6e63m0_suspend, | |
903 | .resume = s6e63m0_resume, | |
904 | }; | |
905 | ||
462dd838 | 906 | module_spi_driver(s6e63m0_driver); |
ee378a5c ID |
907 | |
908 | MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>"); | |
909 | MODULE_DESCRIPTION("S6E63M0 LCD Driver"); | |
910 | MODULE_LICENSE("GPL"); | |
911 |