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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> | |
33 | ||
34 | #include "s6e63m0_gamma.h" | |
35 | ||
36 | #define SLEEPMSEC 0x1000 | |
37 | #define ENDDEF 0x2000 | |
38 | #define DEFMASK 0xFF00 | |
39 | #define COMMAND_ONLY 0xFE | |
40 | #define DATA_ONLY 0xFF | |
41 | ||
42 | #define MIN_BRIGHTNESS 0 | |
43 | #define MAX_BRIGHTNESS 10 | |
44 | ||
45 | #define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) | |
46 | ||
47 | struct s6e63m0 { | |
48 | struct device *dev; | |
49 | struct spi_device *spi; | |
50 | unsigned int power; | |
51 | unsigned int current_brightness; | |
52 | unsigned int gamma_mode; | |
53 | unsigned int gamma_table_count; | |
54 | struct lcd_device *ld; | |
55 | struct backlight_device *bd; | |
56 | struct lcd_platform_data *lcd_pd; | |
57 | }; | |
58 | ||
59 | static const unsigned short SEQ_PANEL_CONDITION_SET[] = { | |
60 | 0xF8, 0x01, | |
61 | DATA_ONLY, 0x27, | |
62 | DATA_ONLY, 0x27, | |
63 | DATA_ONLY, 0x07, | |
64 | DATA_ONLY, 0x07, | |
65 | DATA_ONLY, 0x54, | |
66 | DATA_ONLY, 0x9f, | |
67 | DATA_ONLY, 0x63, | |
68 | DATA_ONLY, 0x86, | |
69 | DATA_ONLY, 0x1a, | |
70 | DATA_ONLY, 0x33, | |
71 | DATA_ONLY, 0x0d, | |
72 | DATA_ONLY, 0x00, | |
73 | DATA_ONLY, 0x00, | |
74 | ||
75 | ENDDEF, 0x0000 | |
76 | }; | |
77 | ||
78 | static const unsigned short SEQ_DISPLAY_CONDITION_SET[] = { | |
79 | 0xf2, 0x02, | |
80 | DATA_ONLY, 0x03, | |
81 | DATA_ONLY, 0x1c, | |
82 | DATA_ONLY, 0x10, | |
83 | DATA_ONLY, 0x10, | |
84 | ||
85 | 0xf7, 0x03, | |
86 | DATA_ONLY, 0x00, | |
87 | DATA_ONLY, 0x00, | |
88 | ||
89 | ENDDEF, 0x0000 | |
90 | }; | |
91 | ||
92 | static const unsigned short SEQ_GAMMA_SETTING[] = { | |
93 | 0xfa, 0x00, | |
94 | DATA_ONLY, 0x18, | |
95 | DATA_ONLY, 0x08, | |
96 | DATA_ONLY, 0x24, | |
97 | DATA_ONLY, 0x64, | |
98 | DATA_ONLY, 0x56, | |
99 | DATA_ONLY, 0x33, | |
100 | DATA_ONLY, 0xb6, | |
101 | DATA_ONLY, 0xba, | |
102 | DATA_ONLY, 0xa8, | |
103 | DATA_ONLY, 0xac, | |
104 | DATA_ONLY, 0xb1, | |
105 | DATA_ONLY, 0x9d, | |
106 | DATA_ONLY, 0xc1, | |
107 | DATA_ONLY, 0xc1, | |
108 | DATA_ONLY, 0xb7, | |
109 | DATA_ONLY, 0x00, | |
110 | DATA_ONLY, 0x9c, | |
111 | DATA_ONLY, 0x00, | |
112 | DATA_ONLY, 0x9f, | |
113 | DATA_ONLY, 0x00, | |
114 | DATA_ONLY, 0xd6, | |
115 | ||
116 | 0xfa, 0x01, | |
117 | ||
118 | ENDDEF, 0x0000 | |
119 | }; | |
120 | ||
121 | static const unsigned short SEQ_ETC_CONDITION_SET[] = { | |
122 | 0xf6, 0x00, | |
123 | DATA_ONLY, 0x8c, | |
124 | DATA_ONLY, 0x07, | |
125 | ||
126 | 0xb3, 0xc, | |
127 | ||
128 | 0xb5, 0x2c, | |
129 | DATA_ONLY, 0x12, | |
130 | DATA_ONLY, 0x0c, | |
131 | DATA_ONLY, 0x0a, | |
132 | DATA_ONLY, 0x10, | |
133 | DATA_ONLY, 0x0e, | |
134 | DATA_ONLY, 0x17, | |
135 | DATA_ONLY, 0x13, | |
136 | DATA_ONLY, 0x1f, | |
137 | DATA_ONLY, 0x1a, | |
138 | DATA_ONLY, 0x2a, | |
139 | DATA_ONLY, 0x24, | |
140 | DATA_ONLY, 0x1f, | |
141 | DATA_ONLY, 0x1b, | |
142 | DATA_ONLY, 0x1a, | |
143 | DATA_ONLY, 0x17, | |
144 | ||
145 | DATA_ONLY, 0x2b, | |
146 | DATA_ONLY, 0x26, | |
147 | DATA_ONLY, 0x22, | |
148 | DATA_ONLY, 0x20, | |
149 | DATA_ONLY, 0x3a, | |
150 | DATA_ONLY, 0x34, | |
151 | DATA_ONLY, 0x30, | |
152 | DATA_ONLY, 0x2c, | |
153 | DATA_ONLY, 0x29, | |
154 | DATA_ONLY, 0x26, | |
155 | DATA_ONLY, 0x25, | |
156 | DATA_ONLY, 0x23, | |
157 | DATA_ONLY, 0x21, | |
158 | DATA_ONLY, 0x20, | |
159 | DATA_ONLY, 0x1e, | |
160 | DATA_ONLY, 0x1e, | |
161 | ||
162 | 0xb6, 0x00, | |
163 | DATA_ONLY, 0x00, | |
164 | DATA_ONLY, 0x11, | |
165 | DATA_ONLY, 0x22, | |
166 | DATA_ONLY, 0x33, | |
167 | DATA_ONLY, 0x44, | |
168 | DATA_ONLY, 0x44, | |
169 | DATA_ONLY, 0x44, | |
170 | ||
171 | DATA_ONLY, 0x55, | |
172 | DATA_ONLY, 0x55, | |
173 | DATA_ONLY, 0x66, | |
174 | DATA_ONLY, 0x66, | |
175 | DATA_ONLY, 0x66, | |
176 | DATA_ONLY, 0x66, | |
177 | DATA_ONLY, 0x66, | |
178 | DATA_ONLY, 0x66, | |
179 | ||
180 | 0xb7, 0x2c, | |
181 | DATA_ONLY, 0x12, | |
182 | DATA_ONLY, 0x0c, | |
183 | DATA_ONLY, 0x0a, | |
184 | DATA_ONLY, 0x10, | |
185 | DATA_ONLY, 0x0e, | |
186 | DATA_ONLY, 0x17, | |
187 | DATA_ONLY, 0x13, | |
188 | DATA_ONLY, 0x1f, | |
189 | DATA_ONLY, 0x1a, | |
190 | DATA_ONLY, 0x2a, | |
191 | DATA_ONLY, 0x24, | |
192 | DATA_ONLY, 0x1f, | |
193 | DATA_ONLY, 0x1b, | |
194 | DATA_ONLY, 0x1a, | |
195 | DATA_ONLY, 0x17, | |
196 | ||
197 | DATA_ONLY, 0x2b, | |
198 | DATA_ONLY, 0x26, | |
199 | DATA_ONLY, 0x22, | |
200 | DATA_ONLY, 0x20, | |
201 | DATA_ONLY, 0x3a, | |
202 | DATA_ONLY, 0x34, | |
203 | DATA_ONLY, 0x30, | |
204 | DATA_ONLY, 0x2c, | |
205 | DATA_ONLY, 0x29, | |
206 | DATA_ONLY, 0x26, | |
207 | DATA_ONLY, 0x25, | |
208 | DATA_ONLY, 0x23, | |
209 | DATA_ONLY, 0x21, | |
210 | DATA_ONLY, 0x20, | |
211 | DATA_ONLY, 0x1e, | |
212 | DATA_ONLY, 0x1e, | |
213 | ||
214 | 0xb8, 0x00, | |
215 | DATA_ONLY, 0x00, | |
216 | DATA_ONLY, 0x11, | |
217 | DATA_ONLY, 0x22, | |
218 | DATA_ONLY, 0x33, | |
219 | DATA_ONLY, 0x44, | |
220 | DATA_ONLY, 0x44, | |
221 | DATA_ONLY, 0x44, | |
222 | ||
223 | DATA_ONLY, 0x55, | |
224 | DATA_ONLY, 0x55, | |
225 | DATA_ONLY, 0x66, | |
226 | DATA_ONLY, 0x66, | |
227 | DATA_ONLY, 0x66, | |
228 | DATA_ONLY, 0x66, | |
229 | DATA_ONLY, 0x66, | |
230 | DATA_ONLY, 0x66, | |
231 | ||
232 | 0xb9, 0x2c, | |
233 | DATA_ONLY, 0x12, | |
234 | DATA_ONLY, 0x0c, | |
235 | DATA_ONLY, 0x0a, | |
236 | DATA_ONLY, 0x10, | |
237 | DATA_ONLY, 0x0e, | |
238 | DATA_ONLY, 0x17, | |
239 | DATA_ONLY, 0x13, | |
240 | DATA_ONLY, 0x1f, | |
241 | DATA_ONLY, 0x1a, | |
242 | DATA_ONLY, 0x2a, | |
243 | DATA_ONLY, 0x24, | |
244 | DATA_ONLY, 0x1f, | |
245 | DATA_ONLY, 0x1b, | |
246 | DATA_ONLY, 0x1a, | |
247 | DATA_ONLY, 0x17, | |
248 | ||
249 | DATA_ONLY, 0x2b, | |
250 | DATA_ONLY, 0x26, | |
251 | DATA_ONLY, 0x22, | |
252 | DATA_ONLY, 0x20, | |
253 | DATA_ONLY, 0x3a, | |
254 | DATA_ONLY, 0x34, | |
255 | DATA_ONLY, 0x30, | |
256 | DATA_ONLY, 0x2c, | |
257 | DATA_ONLY, 0x29, | |
258 | DATA_ONLY, 0x26, | |
259 | DATA_ONLY, 0x25, | |
260 | DATA_ONLY, 0x23, | |
261 | DATA_ONLY, 0x21, | |
262 | DATA_ONLY, 0x20, | |
263 | DATA_ONLY, 0x1e, | |
264 | DATA_ONLY, 0x1e, | |
265 | ||
266 | 0xba, 0x00, | |
267 | DATA_ONLY, 0x00, | |
268 | DATA_ONLY, 0x11, | |
269 | DATA_ONLY, 0x22, | |
270 | DATA_ONLY, 0x33, | |
271 | DATA_ONLY, 0x44, | |
272 | DATA_ONLY, 0x44, | |
273 | DATA_ONLY, 0x44, | |
274 | ||
275 | DATA_ONLY, 0x55, | |
276 | DATA_ONLY, 0x55, | |
277 | DATA_ONLY, 0x66, | |
278 | DATA_ONLY, 0x66, | |
279 | DATA_ONLY, 0x66, | |
280 | DATA_ONLY, 0x66, | |
281 | DATA_ONLY, 0x66, | |
282 | DATA_ONLY, 0x66, | |
283 | ||
284 | 0xc1, 0x4d, | |
285 | DATA_ONLY, 0x96, | |
286 | DATA_ONLY, 0x1d, | |
287 | DATA_ONLY, 0x00, | |
288 | DATA_ONLY, 0x00, | |
289 | DATA_ONLY, 0x01, | |
290 | DATA_ONLY, 0xdf, | |
291 | DATA_ONLY, 0x00, | |
292 | DATA_ONLY, 0x00, | |
293 | DATA_ONLY, 0x03, | |
294 | DATA_ONLY, 0x1f, | |
295 | DATA_ONLY, 0x00, | |
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, 0x03, | |
304 | DATA_ONLY, 0x06, | |
305 | DATA_ONLY, 0x09, | |
306 | DATA_ONLY, 0x0d, | |
307 | DATA_ONLY, 0x0f, | |
308 | DATA_ONLY, 0x12, | |
309 | DATA_ONLY, 0x15, | |
310 | DATA_ONLY, 0x18, | |
311 | ||
312 | 0xb2, 0x10, | |
313 | DATA_ONLY, 0x10, | |
314 | DATA_ONLY, 0x0b, | |
315 | DATA_ONLY, 0x05, | |
316 | ||
317 | ENDDEF, 0x0000 | |
318 | }; | |
319 | ||
320 | static const unsigned short SEQ_ACL_ON[] = { | |
321 | /* ACL on */ | |
322 | 0xc0, 0x01, | |
323 | ||
324 | ENDDEF, 0x0000 | |
325 | }; | |
326 | ||
327 | static const unsigned short SEQ_ACL_OFF[] = { | |
328 | /* ACL off */ | |
329 | 0xc0, 0x00, | |
330 | ||
331 | ENDDEF, 0x0000 | |
332 | }; | |
333 | ||
334 | static const unsigned short SEQ_ELVSS_ON[] = { | |
335 | /* ELVSS on */ | |
336 | 0xb1, 0x0b, | |
337 | ||
338 | ENDDEF, 0x0000 | |
339 | }; | |
340 | ||
341 | static const unsigned short SEQ_ELVSS_OFF[] = { | |
342 | /* ELVSS off */ | |
343 | 0xb1, 0x0a, | |
344 | ||
345 | ENDDEF, 0x0000 | |
346 | }; | |
347 | ||
348 | static const unsigned short SEQ_STAND_BY_OFF[] = { | |
349 | 0x11, COMMAND_ONLY, | |
350 | ||
351 | ENDDEF, 0x0000 | |
352 | }; | |
353 | ||
354 | static const unsigned short SEQ_STAND_BY_ON[] = { | |
355 | 0x10, COMMAND_ONLY, | |
356 | ||
357 | ENDDEF, 0x0000 | |
358 | }; | |
359 | ||
360 | static const unsigned short SEQ_DISPLAY_ON[] = { | |
361 | 0x29, COMMAND_ONLY, | |
362 | ||
363 | ENDDEF, 0x0000 | |
364 | }; | |
365 | ||
366 | ||
367 | static int s6e63m0_spi_write_byte(struct s6e63m0 *lcd, int addr, int data) | |
368 | { | |
369 | u16 buf[1]; | |
370 | struct spi_message msg; | |
371 | ||
372 | struct spi_transfer xfer = { | |
373 | .len = 2, | |
374 | .tx_buf = buf, | |
375 | }; | |
376 | ||
377 | buf[0] = (addr << 8) | data; | |
378 | ||
379 | spi_message_init(&msg); | |
380 | spi_message_add_tail(&xfer, &msg); | |
381 | ||
382 | return spi_sync(lcd->spi, &msg); | |
383 | } | |
384 | ||
385 | static int s6e63m0_spi_write(struct s6e63m0 *lcd, unsigned char address, | |
386 | unsigned char command) | |
387 | { | |
388 | int ret = 0; | |
389 | ||
390 | if (address != DATA_ONLY) | |
391 | ret = s6e63m0_spi_write_byte(lcd, 0x0, address); | |
392 | if (command != COMMAND_ONLY) | |
393 | ret = s6e63m0_spi_write_byte(lcd, 0x1, command); | |
394 | ||
395 | return ret; | |
396 | } | |
397 | ||
398 | static int s6e63m0_panel_send_sequence(struct s6e63m0 *lcd, | |
399 | const unsigned short *wbuf) | |
400 | { | |
401 | int ret = 0, i = 0; | |
402 | ||
403 | while ((wbuf[i] & DEFMASK) != ENDDEF) { | |
404 | if ((wbuf[i] & DEFMASK) != SLEEPMSEC) { | |
405 | ret = s6e63m0_spi_write(lcd, wbuf[i], wbuf[i+1]); | |
406 | if (ret) | |
407 | break; | |
408 | } else | |
409 | udelay(wbuf[i+1]*1000); | |
410 | i += 2; | |
411 | } | |
412 | ||
413 | return ret; | |
414 | } | |
415 | ||
416 | static int _s6e63m0_gamma_ctl(struct s6e63m0 *lcd, const unsigned int *gamma) | |
417 | { | |
418 | unsigned int i = 0; | |
419 | int ret = 0; | |
420 | ||
421 | /* disable gamma table updating. */ | |
422 | ret = s6e63m0_spi_write(lcd, 0xfa, 0x00); | |
423 | if (ret) { | |
424 | dev_err(lcd->dev, "failed to disable gamma table updating.\n"); | |
425 | goto gamma_err; | |
426 | } | |
427 | ||
428 | for (i = 0 ; i < GAMMA_TABLE_COUNT; i++) { | |
429 | ret = s6e63m0_spi_write(lcd, DATA_ONLY, gamma[i]); | |
430 | if (ret) { | |
431 | dev_err(lcd->dev, "failed to set gamma table.\n"); | |
432 | goto gamma_err; | |
433 | } | |
434 | } | |
435 | ||
436 | /* update gamma table. */ | |
437 | ret = s6e63m0_spi_write(lcd, 0xfa, 0x01); | |
438 | if (ret) | |
439 | dev_err(lcd->dev, "failed to update gamma table.\n"); | |
440 | ||
441 | gamma_err: | |
442 | return ret; | |
443 | } | |
444 | ||
445 | static int s6e63m0_gamma_ctl(struct s6e63m0 *lcd, int gamma) | |
446 | { | |
447 | int ret = 0; | |
448 | ||
449 | ret = _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]); | |
450 | ||
451 | return ret; | |
452 | } | |
453 | ||
454 | ||
455 | static int s6e63m0_ldi_init(struct s6e63m0 *lcd) | |
456 | { | |
457 | int ret, i; | |
458 | const unsigned short *init_seq[] = { | |
459 | SEQ_PANEL_CONDITION_SET, | |
460 | SEQ_DISPLAY_CONDITION_SET, | |
461 | SEQ_GAMMA_SETTING, | |
462 | SEQ_ETC_CONDITION_SET, | |
463 | SEQ_ACL_ON, | |
464 | SEQ_ELVSS_ON, | |
465 | }; | |
466 | ||
467 | for (i = 0; i < ARRAY_SIZE(init_seq); i++) { | |
468 | ret = s6e63m0_panel_send_sequence(lcd, init_seq[i]); | |
469 | if (ret) | |
470 | break; | |
471 | } | |
472 | ||
473 | return ret; | |
474 | } | |
475 | ||
476 | static int s6e63m0_ldi_enable(struct s6e63m0 *lcd) | |
477 | { | |
478 | int ret = 0, i; | |
479 | const unsigned short *enable_seq[] = { | |
480 | SEQ_STAND_BY_OFF, | |
481 | SEQ_DISPLAY_ON, | |
482 | }; | |
483 | ||
484 | for (i = 0; i < ARRAY_SIZE(enable_seq); i++) { | |
485 | ret = s6e63m0_panel_send_sequence(lcd, enable_seq[i]); | |
486 | if (ret) | |
487 | break; | |
488 | } | |
489 | ||
490 | return ret; | |
491 | } | |
492 | ||
493 | static int s6e63m0_ldi_disable(struct s6e63m0 *lcd) | |
494 | { | |
495 | int ret; | |
496 | ||
497 | ret = s6e63m0_panel_send_sequence(lcd, SEQ_STAND_BY_ON); | |
498 | ||
499 | return ret; | |
500 | } | |
501 | ||
502 | static int s6e63m0_power_on(struct s6e63m0 *lcd) | |
503 | { | |
504 | int ret = 0; | |
505 | struct lcd_platform_data *pd = NULL; | |
506 | struct backlight_device *bd = NULL; | |
507 | ||
508 | pd = lcd->lcd_pd; | |
509 | if (!pd) { | |
510 | dev_err(lcd->dev, "platform data is NULL.\n"); | |
511 | return -EFAULT; | |
512 | } | |
513 | ||
514 | bd = lcd->bd; | |
515 | if (!bd) { | |
516 | dev_err(lcd->dev, "backlight device is NULL.\n"); | |
517 | return -EFAULT; | |
518 | } | |
519 | ||
520 | if (!pd->power_on) { | |
521 | dev_err(lcd->dev, "power_on is NULL.\n"); | |
522 | return -EFAULT; | |
523 | } else { | |
524 | pd->power_on(lcd->ld, 1); | |
525 | mdelay(pd->power_on_delay); | |
526 | } | |
527 | ||
528 | if (!pd->reset) { | |
529 | dev_err(lcd->dev, "reset is NULL.\n"); | |
530 | return -EFAULT; | |
531 | } else { | |
532 | pd->reset(lcd->ld); | |
533 | mdelay(pd->reset_delay); | |
534 | } | |
535 | ||
536 | ret = s6e63m0_ldi_init(lcd); | |
537 | if (ret) { | |
538 | dev_err(lcd->dev, "failed to initialize ldi.\n"); | |
539 | return ret; | |
540 | } | |
541 | ||
542 | ret = s6e63m0_ldi_enable(lcd); | |
543 | if (ret) { | |
544 | dev_err(lcd->dev, "failed to enable ldi.\n"); | |
545 | return ret; | |
546 | } | |
547 | ||
548 | /* set brightness to current value after power on or resume. */ | |
549 | ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness); | |
550 | if (ret) { | |
551 | dev_err(lcd->dev, "lcd gamma setting failed.\n"); | |
552 | return ret; | |
553 | } | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | static int s6e63m0_power_off(struct s6e63m0 *lcd) | |
559 | { | |
560 | int ret = 0; | |
561 | struct lcd_platform_data *pd = NULL; | |
562 | ||
563 | pd = lcd->lcd_pd; | |
564 | if (!pd) { | |
565 | dev_err(lcd->dev, "platform data is NULL.\n"); | |
566 | return -EFAULT; | |
567 | } | |
568 | ||
569 | ret = s6e63m0_ldi_disable(lcd); | |
570 | if (ret) { | |
571 | dev_err(lcd->dev, "lcd setting failed.\n"); | |
572 | return -EIO; | |
573 | } | |
574 | ||
575 | mdelay(pd->power_off_delay); | |
576 | ||
577 | if (!pd->power_on) { | |
578 | dev_err(lcd->dev, "power_on is NULL.\n"); | |
579 | return -EFAULT; | |
580 | } else | |
581 | pd->power_on(lcd->ld, 0); | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
586 | static int s6e63m0_power(struct s6e63m0 *lcd, int power) | |
587 | { | |
588 | int ret = 0; | |
589 | ||
590 | if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) | |
591 | ret = s6e63m0_power_on(lcd); | |
592 | else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) | |
593 | ret = s6e63m0_power_off(lcd); | |
594 | ||
595 | if (!ret) | |
596 | lcd->power = power; | |
597 | ||
598 | return ret; | |
599 | } | |
600 | ||
601 | static int s6e63m0_set_power(struct lcd_device *ld, int power) | |
602 | { | |
603 | struct s6e63m0 *lcd = lcd_get_data(ld); | |
604 | ||
605 | if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN && | |
606 | power != FB_BLANK_NORMAL) { | |
607 | dev_err(lcd->dev, "power value should be 0, 1 or 4.\n"); | |
608 | return -EINVAL; | |
609 | } | |
610 | ||
611 | return s6e63m0_power(lcd, power); | |
612 | } | |
613 | ||
614 | static int s6e63m0_get_power(struct lcd_device *ld) | |
615 | { | |
616 | struct s6e63m0 *lcd = lcd_get_data(ld); | |
617 | ||
618 | return lcd->power; | |
619 | } | |
620 | ||
621 | static int s6e63m0_get_brightness(struct backlight_device *bd) | |
622 | { | |
623 | return bd->props.brightness; | |
624 | } | |
625 | ||
626 | static int s6e63m0_set_brightness(struct backlight_device *bd) | |
627 | { | |
628 | int ret = 0, brightness = bd->props.brightness; | |
629 | struct s6e63m0 *lcd = bl_get_data(bd); | |
630 | ||
631 | if (brightness < MIN_BRIGHTNESS || | |
632 | brightness > bd->props.max_brightness) { | |
633 | dev_err(&bd->dev, "lcd brightness should be %d to %d.\n", | |
634 | MIN_BRIGHTNESS, MAX_BRIGHTNESS); | |
635 | return -EINVAL; | |
636 | } | |
637 | ||
638 | ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness); | |
639 | if (ret) { | |
640 | dev_err(&bd->dev, "lcd brightness setting failed.\n"); | |
641 | return -EIO; | |
642 | } | |
643 | ||
644 | return ret; | |
645 | } | |
646 | ||
647 | static struct lcd_ops s6e63m0_lcd_ops = { | |
648 | .set_power = s6e63m0_set_power, | |
649 | .get_power = s6e63m0_get_power, | |
650 | }; | |
651 | ||
652 | static const struct backlight_ops s6e63m0_backlight_ops = { | |
653 | .get_brightness = s6e63m0_get_brightness, | |
654 | .update_status = s6e63m0_set_brightness, | |
655 | }; | |
656 | ||
657 | static ssize_t s6e63m0_sysfs_show_gamma_mode(struct device *dev, | |
658 | struct device_attribute *attr, char *buf) | |
659 | { | |
660 | struct s6e63m0 *lcd = dev_get_drvdata(dev); | |
661 | char temp[10]; | |
662 | ||
663 | switch (lcd->gamma_mode) { | |
664 | case 0: | |
665 | sprintf(temp, "2.2 mode\n"); | |
666 | strcat(buf, temp); | |
667 | break; | |
668 | case 1: | |
669 | sprintf(temp, "1.9 mode\n"); | |
670 | strcat(buf, temp); | |
671 | break; | |
672 | case 2: | |
673 | sprintf(temp, "1.7 mode\n"); | |
674 | strcat(buf, temp); | |
675 | break; | |
676 | default: | |
677 | dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7)n"); | |
678 | break; | |
679 | } | |
680 | ||
681 | return strlen(buf); | |
682 | } | |
683 | ||
684 | static ssize_t s6e63m0_sysfs_store_gamma_mode(struct device *dev, | |
685 | struct device_attribute *attr, | |
686 | const char *buf, size_t len) | |
687 | { | |
688 | struct s6e63m0 *lcd = dev_get_drvdata(dev); | |
689 | struct backlight_device *bd = NULL; | |
690 | int brightness, rc; | |
691 | ||
692 | rc = strict_strtoul(buf, 0, (unsigned long *)&lcd->gamma_mode); | |
693 | if (rc < 0) | |
694 | return rc; | |
695 | ||
696 | bd = lcd->bd; | |
697 | ||
698 | brightness = bd->props.brightness; | |
699 | ||
700 | switch (lcd->gamma_mode) { | |
701 | case 0: | |
702 | _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]); | |
703 | break; | |
704 | case 1: | |
705 | _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_19_table[brightness]); | |
706 | break; | |
707 | case 2: | |
708 | _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_17_table[brightness]); | |
709 | break; | |
710 | default: | |
711 | dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7\n"); | |
712 | _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]); | |
713 | break; | |
714 | } | |
715 | return len; | |
716 | } | |
717 | ||
718 | static DEVICE_ATTR(gamma_mode, 0644, | |
719 | s6e63m0_sysfs_show_gamma_mode, s6e63m0_sysfs_store_gamma_mode); | |
720 | ||
721 | static ssize_t s6e63m0_sysfs_show_gamma_table(struct device *dev, | |
722 | struct device_attribute *attr, char *buf) | |
723 | { | |
724 | struct s6e63m0 *lcd = dev_get_drvdata(dev); | |
725 | char temp[3]; | |
726 | ||
727 | sprintf(temp, "%d\n", lcd->gamma_table_count); | |
728 | strcpy(buf, temp); | |
729 | ||
730 | return strlen(buf); | |
731 | } | |
ed3a6787 | 732 | static DEVICE_ATTR(gamma_table, 0444, |
ee378a5c ID |
733 | s6e63m0_sysfs_show_gamma_table, NULL); |
734 | ||
735 | static int __init s6e63m0_probe(struct spi_device *spi) | |
736 | { | |
737 | int ret = 0; | |
738 | struct s6e63m0 *lcd = NULL; | |
739 | struct lcd_device *ld = NULL; | |
740 | struct backlight_device *bd = NULL; | |
741 | ||
742 | lcd = kzalloc(sizeof(struct s6e63m0), GFP_KERNEL); | |
743 | if (!lcd) | |
744 | return -ENOMEM; | |
745 | ||
746 | /* s6e63m0 lcd panel uses 3-wire 9bits SPI Mode. */ | |
747 | spi->bits_per_word = 9; | |
748 | ||
749 | ret = spi_setup(spi); | |
750 | if (ret < 0) { | |
751 | dev_err(&spi->dev, "spi setup failed.\n"); | |
752 | goto out_free_lcd; | |
753 | } | |
754 | ||
755 | lcd->spi = spi; | |
756 | lcd->dev = &spi->dev; | |
757 | ||
758 | lcd->lcd_pd = (struct lcd_platform_data *)spi->dev.platform_data; | |
759 | if (!lcd->lcd_pd) { | |
760 | dev_err(&spi->dev, "platform data is NULL.\n"); | |
761 | goto out_free_lcd; | |
762 | } | |
763 | ||
764 | ld = lcd_device_register("s6e63m0", &spi->dev, lcd, &s6e63m0_lcd_ops); | |
765 | if (IS_ERR(ld)) { | |
766 | ret = PTR_ERR(ld); | |
767 | goto out_free_lcd; | |
768 | } | |
769 | ||
770 | lcd->ld = ld; | |
771 | ||
772 | bd = backlight_device_register("s6e63m0bl-bl", &spi->dev, lcd, | |
773 | &s6e63m0_backlight_ops, NULL); | |
774 | if (IS_ERR(bd)) { | |
775 | ret = PTR_ERR(bd); | |
776 | goto out_lcd_unregister; | |
777 | } | |
778 | ||
779 | bd->props.max_brightness = MAX_BRIGHTNESS; | |
780 | bd->props.brightness = MAX_BRIGHTNESS; | |
781 | lcd->bd = bd; | |
782 | ||
783 | /* | |
784 | * it gets gamma table count available so it gets user | |
785 | * know that. | |
786 | */ | |
787 | lcd->gamma_table_count = | |
788 | sizeof(gamma_table) / (MAX_GAMMA_LEVEL * sizeof(int)); | |
789 | ||
790 | ret = device_create_file(&(spi->dev), &dev_attr_gamma_mode); | |
791 | if (ret < 0) | |
792 | dev_err(&(spi->dev), "failed to add sysfs entries\n"); | |
793 | ||
794 | ret = device_create_file(&(spi->dev), &dev_attr_gamma_table); | |
795 | if (ret < 0) | |
796 | dev_err(&(spi->dev), "failed to add sysfs entries\n"); | |
797 | ||
798 | /* | |
799 | * if lcd panel was on from bootloader like u-boot then | |
800 | * do not lcd on. | |
801 | */ | |
802 | if (!lcd->lcd_pd->lcd_enabled) { | |
803 | /* | |
804 | * if lcd panel was off from bootloader then | |
805 | * current lcd status is powerdown and then | |
806 | * it enables lcd panel. | |
807 | */ | |
808 | lcd->power = FB_BLANK_POWERDOWN; | |
809 | ||
810 | s6e63m0_power(lcd, FB_BLANK_UNBLANK); | |
811 | } else | |
812 | lcd->power = FB_BLANK_UNBLANK; | |
813 | ||
814 | dev_set_drvdata(&spi->dev, lcd); | |
815 | ||
816 | dev_info(&spi->dev, "s6e63m0 panel driver has been probed.\n"); | |
817 | ||
818 | return 0; | |
819 | ||
820 | out_lcd_unregister: | |
821 | lcd_device_unregister(ld); | |
822 | out_free_lcd: | |
823 | kfree(lcd); | |
824 | return ret; | |
825 | } | |
826 | ||
827 | static int __devexit s6e63m0_remove(struct spi_device *spi) | |
828 | { | |
829 | struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev); | |
830 | ||
831 | s6e63m0_power(lcd, FB_BLANK_POWERDOWN); | |
d974e00b AL |
832 | device_remove_file(&spi->dev, &dev_attr_gamma_table); |
833 | device_remove_file(&spi->dev, &dev_attr_gamma_mode); | |
834 | backlight_device_unregister(lcd->bd); | |
ee378a5c ID |
835 | lcd_device_unregister(lcd->ld); |
836 | kfree(lcd); | |
837 | ||
838 | return 0; | |
839 | } | |
840 | ||
841 | #if defined(CONFIG_PM) | |
842 | unsigned int before_power; | |
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", | |
897 | .bus = &spi_bus_type, | |
898 | .owner = THIS_MODULE, | |
899 | }, | |
900 | .probe = s6e63m0_probe, | |
901 | .remove = __devexit_p(s6e63m0_remove), | |
902 | .shutdown = s6e63m0_shutdown, | |
903 | .suspend = s6e63m0_suspend, | |
904 | .resume = s6e63m0_resume, | |
905 | }; | |
906 | ||
907 | static int __init s6e63m0_init(void) | |
908 | { | |
909 | return spi_register_driver(&s6e63m0_driver); | |
910 | } | |
911 | ||
912 | static void __exit s6e63m0_exit(void) | |
913 | { | |
914 | spi_unregister_driver(&s6e63m0_driver); | |
915 | } | |
916 | ||
917 | module_init(s6e63m0_init); | |
918 | module_exit(s6e63m0_exit); | |
919 | ||
920 | MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>"); | |
921 | MODULE_DESCRIPTION("S6E63M0 LCD Driver"); | |
922 | MODULE_LICENSE("GPL"); | |
923 |