2 * ams369fg06 AMOLED LCD panel driver.
4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * Author: Jingoo Han <jg1.han@samsung.com>
7 * Derived from drivers/video/s6e63m0.c
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
15 #include <linux/backlight.h>
16 #include <linux/delay.h>
18 #include <linux/gpio.h>
19 #include <linux/lcd.h>
20 #include <linux/module.h>
21 #include <linux/spi/spi.h>
22 #include <linux/wait.h>
24 #define SLEEPMSEC 0x1000
26 #define DEFMASK 0xFF00
27 #define COMMAND_ONLY 0xFE
28 #define DATA_ONLY 0xFF
30 #define MAX_GAMMA_LEVEL 5
31 #define GAMMA_TABLE_COUNT 21
33 #define MIN_BRIGHTNESS 0
34 #define MAX_BRIGHTNESS 255
35 #define DEFAULT_BRIGHTNESS 150
39 struct spi_device
*spi
;
41 struct lcd_device
*ld
;
42 struct backlight_device
*bd
;
43 struct lcd_platform_data
*lcd_pd
;
46 static const unsigned short seq_display_on
[] = {
51 static const unsigned short seq_display_off
[] = {
56 static const unsigned short seq_stand_by_on
[] = {
62 static const unsigned short seq_stand_by_off
[] = {
68 static const unsigned short seq_setting
[] = {
120 /* gamma value: 2.2 */
121 static const unsigned int ams369fg06_22_250
[] = {
122 0x00, 0x3f, 0x2a, 0x27, 0x27, 0x1f, 0x44,
123 0x00, 0x00, 0x17, 0x24, 0x26, 0x1f, 0x43,
124 0x00, 0x3f, 0x2a, 0x25, 0x24, 0x1b, 0x5c,
127 static const unsigned int ams369fg06_22_200
[] = {
128 0x00, 0x3f, 0x28, 0x29, 0x27, 0x21, 0x3e,
129 0x00, 0x00, 0x10, 0x25, 0x27, 0x20, 0x3d,
130 0x00, 0x3f, 0x28, 0x27, 0x25, 0x1d, 0x53,
133 static const unsigned int ams369fg06_22_150
[] = {
134 0x00, 0x3f, 0x2d, 0x29, 0x28, 0x23, 0x37,
135 0x00, 0x00, 0x0b, 0x25, 0x28, 0x22, 0x36,
136 0x00, 0x3f, 0x2b, 0x28, 0x26, 0x1f, 0x4a,
139 static const unsigned int ams369fg06_22_100
[] = {
140 0x00, 0x3f, 0x30, 0x2a, 0x2b, 0x24, 0x2f,
141 0x00, 0x00, 0x00, 0x25, 0x29, 0x24, 0x2e,
142 0x00, 0x3f, 0x2f, 0x29, 0x29, 0x21, 0x3f,
145 static const unsigned int ams369fg06_22_50
[] = {
146 0x00, 0x3f, 0x3c, 0x2c, 0x2d, 0x27, 0x24,
147 0x00, 0x00, 0x00, 0x22, 0x2a, 0x27, 0x23,
148 0x00, 0x3f, 0x3b, 0x2c, 0x2b, 0x24, 0x31,
151 struct ams369fg06_gamma
{
152 unsigned int *gamma_22_table
[MAX_GAMMA_LEVEL
];
155 static struct ams369fg06_gamma gamma_table
= {
156 .gamma_22_table
[0] = (unsigned int *)&ams369fg06_22_50
,
157 .gamma_22_table
[1] = (unsigned int *)&ams369fg06_22_100
,
158 .gamma_22_table
[2] = (unsigned int *)&ams369fg06_22_150
,
159 .gamma_22_table
[3] = (unsigned int *)&ams369fg06_22_200
,
160 .gamma_22_table
[4] = (unsigned int *)&ams369fg06_22_250
,
163 static int ams369fg06_spi_write_byte(struct ams369fg06
*lcd
, int addr
, int data
)
166 struct spi_message msg
;
168 struct spi_transfer xfer
= {
173 buf
[0] = (addr
<< 8) | data
;
175 spi_message_init(&msg
);
176 spi_message_add_tail(&xfer
, &msg
);
178 return spi_sync(lcd
->spi
, &msg
);
181 static int ams369fg06_spi_write(struct ams369fg06
*lcd
, unsigned char address
,
182 unsigned char command
)
186 if (address
!= DATA_ONLY
)
187 ret
= ams369fg06_spi_write_byte(lcd
, 0x70, address
);
188 if (command
!= COMMAND_ONLY
)
189 ret
= ams369fg06_spi_write_byte(lcd
, 0x72, command
);
194 static int ams369fg06_panel_send_sequence(struct ams369fg06
*lcd
,
195 const unsigned short *wbuf
)
199 while ((wbuf
[i
] & DEFMASK
) != ENDDEF
) {
200 if ((wbuf
[i
] & DEFMASK
) != SLEEPMSEC
) {
201 ret
= ams369fg06_spi_write(lcd
, wbuf
[i
], wbuf
[i
+1]);
213 static int _ams369fg06_gamma_ctl(struct ams369fg06
*lcd
,
214 const unsigned int *gamma
)
219 for (i
= 0 ; i
< GAMMA_TABLE_COUNT
/ 3; i
++) {
220 ret
= ams369fg06_spi_write(lcd
, 0x40 + i
, gamma
[i
]);
221 ret
= ams369fg06_spi_write(lcd
, 0x50 + i
, gamma
[i
+7*1]);
222 ret
= ams369fg06_spi_write(lcd
, 0x60 + i
, gamma
[i
+7*2]);
224 dev_err(lcd
->dev
, "failed to set gamma table.\n");
233 static int ams369fg06_gamma_ctl(struct ams369fg06
*lcd
, int brightness
)
238 if ((brightness
>= 0) && (brightness
<= 50))
240 else if ((brightness
> 50) && (brightness
<= 100))
242 else if ((brightness
> 100) && (brightness
<= 150))
244 else if ((brightness
> 150) && (brightness
<= 200))
246 else if ((brightness
> 200) && (brightness
<= 255))
249 ret
= _ams369fg06_gamma_ctl(lcd
, gamma_table
.gamma_22_table
[gamma
]);
254 static int ams369fg06_ldi_init(struct ams369fg06
*lcd
)
257 static const unsigned short *init_seq
[] = {
262 for (i
= 0; i
< ARRAY_SIZE(init_seq
); i
++) {
263 ret
= ams369fg06_panel_send_sequence(lcd
, init_seq
[i
]);
271 static int ams369fg06_ldi_enable(struct ams369fg06
*lcd
)
274 static const unsigned short *init_seq
[] = {
279 for (i
= 0; i
< ARRAY_SIZE(init_seq
); i
++) {
280 ret
= ams369fg06_panel_send_sequence(lcd
, init_seq
[i
]);
288 static int ams369fg06_ldi_disable(struct ams369fg06
*lcd
)
292 static const unsigned short *init_seq
[] = {
297 for (i
= 0; i
< ARRAY_SIZE(init_seq
); i
++) {
298 ret
= ams369fg06_panel_send_sequence(lcd
, init_seq
[i
]);
306 static int ams369fg06_power_is_on(int power
)
308 return power
<= FB_BLANK_NORMAL
;
311 static int ams369fg06_power_on(struct ams369fg06
*lcd
)
314 struct lcd_platform_data
*pd
;
315 struct backlight_device
*bd
;
321 dev_err(lcd
->dev
, "power_on is NULL.\n");
324 pd
->power_on(lcd
->ld
, 1);
325 msleep(pd
->power_on_delay
);
329 dev_err(lcd
->dev
, "reset is NULL.\n");
333 msleep(pd
->reset_delay
);
336 ret
= ams369fg06_ldi_init(lcd
);
338 dev_err(lcd
->dev
, "failed to initialize ldi.\n");
342 ret
= ams369fg06_ldi_enable(lcd
);
344 dev_err(lcd
->dev
, "failed to enable ldi.\n");
348 /* set brightness to current value after power on or resume. */
349 ret
= ams369fg06_gamma_ctl(lcd
, bd
->props
.brightness
);
351 dev_err(lcd
->dev
, "lcd gamma setting failed.\n");
358 static int ams369fg06_power_off(struct ams369fg06
*lcd
)
361 struct lcd_platform_data
*pd
;
365 ret
= ams369fg06_ldi_disable(lcd
);
367 dev_err(lcd
->dev
, "lcd setting failed.\n");
371 msleep(pd
->power_off_delay
);
373 pd
->power_on(lcd
->ld
, 0);
378 static int ams369fg06_power(struct ams369fg06
*lcd
, int power
)
382 if (ams369fg06_power_is_on(power
) &&
383 !ams369fg06_power_is_on(lcd
->power
))
384 ret
= ams369fg06_power_on(lcd
);
385 else if (!ams369fg06_power_is_on(power
) &&
386 ams369fg06_power_is_on(lcd
->power
))
387 ret
= ams369fg06_power_off(lcd
);
395 static int ams369fg06_get_power(struct lcd_device
*ld
)
397 struct ams369fg06
*lcd
= lcd_get_data(ld
);
402 static int ams369fg06_set_power(struct lcd_device
*ld
, int power
)
404 struct ams369fg06
*lcd
= lcd_get_data(ld
);
406 if (power
!= FB_BLANK_UNBLANK
&& power
!= FB_BLANK_POWERDOWN
&&
407 power
!= FB_BLANK_NORMAL
) {
408 dev_err(lcd
->dev
, "power value should be 0, 1 or 4.\n");
412 return ams369fg06_power(lcd
, power
);
415 static int ams369fg06_get_brightness(struct backlight_device
*bd
)
417 return bd
->props
.brightness
;
420 static int ams369fg06_set_brightness(struct backlight_device
*bd
)
423 int brightness
= bd
->props
.brightness
;
424 struct ams369fg06
*lcd
= dev_get_drvdata(&bd
->dev
);
426 if (brightness
< MIN_BRIGHTNESS
||
427 brightness
> bd
->props
.max_brightness
) {
428 dev_err(&bd
->dev
, "lcd brightness should be %d to %d.\n",
429 MIN_BRIGHTNESS
, MAX_BRIGHTNESS
);
433 ret
= ams369fg06_gamma_ctl(lcd
, bd
->props
.brightness
);
435 dev_err(&bd
->dev
, "lcd brightness setting failed.\n");
442 static struct lcd_ops ams369fg06_lcd_ops
= {
443 .get_power
= ams369fg06_get_power
,
444 .set_power
= ams369fg06_set_power
,
447 static const struct backlight_ops ams369fg06_backlight_ops
= {
448 .get_brightness
= ams369fg06_get_brightness
,
449 .update_status
= ams369fg06_set_brightness
,
452 static int ams369fg06_probe(struct spi_device
*spi
)
455 struct ams369fg06
*lcd
= NULL
;
456 struct lcd_device
*ld
= NULL
;
457 struct backlight_device
*bd
= NULL
;
458 struct backlight_properties props
;
460 lcd
= devm_kzalloc(&spi
->dev
, sizeof(struct ams369fg06
), GFP_KERNEL
);
464 /* ams369fg06 lcd panel uses 3-wire 16bits SPI Mode. */
465 spi
->bits_per_word
= 16;
467 ret
= spi_setup(spi
);
469 dev_err(&spi
->dev
, "spi setup failed.\n");
474 lcd
->dev
= &spi
->dev
;
476 lcd
->lcd_pd
= spi
->dev
.platform_data
;
478 dev_err(&spi
->dev
, "platform data is NULL\n");
482 ld
= lcd_device_register("ams369fg06", &spi
->dev
, lcd
,
483 &ams369fg06_lcd_ops
);
489 memset(&props
, 0, sizeof(struct backlight_properties
));
490 props
.type
= BACKLIGHT_RAW
;
491 props
.max_brightness
= MAX_BRIGHTNESS
;
493 bd
= backlight_device_register("ams369fg06-bl", &spi
->dev
, lcd
,
494 &ams369fg06_backlight_ops
, &props
);
497 goto out_lcd_unregister
;
500 bd
->props
.brightness
= DEFAULT_BRIGHTNESS
;
503 if (!lcd
->lcd_pd
->lcd_enabled
) {
505 * if lcd panel was off from bootloader then
506 * current lcd status is powerdown and then
507 * it enables lcd panel.
509 lcd
->power
= FB_BLANK_POWERDOWN
;
511 ams369fg06_power(lcd
, FB_BLANK_UNBLANK
);
513 lcd
->power
= FB_BLANK_UNBLANK
;
516 dev_set_drvdata(&spi
->dev
, lcd
);
518 dev_info(&spi
->dev
, "ams369fg06 panel driver has been probed.\n");
523 lcd_device_unregister(ld
);
527 static int ams369fg06_remove(struct spi_device
*spi
)
529 struct ams369fg06
*lcd
= dev_get_drvdata(&spi
->dev
);
531 ams369fg06_power(lcd
, FB_BLANK_POWERDOWN
);
532 backlight_device_unregister(lcd
->bd
);
533 lcd_device_unregister(lcd
->ld
);
538 #if defined(CONFIG_PM)
539 static int ams369fg06_suspend(struct spi_device
*spi
, pm_message_t mesg
)
541 struct ams369fg06
*lcd
= dev_get_drvdata(&spi
->dev
);
543 dev_dbg(&spi
->dev
, "lcd->power = %d\n", lcd
->power
);
546 * when lcd panel is suspend, lcd panel becomes off
547 * regardless of status.
549 return ams369fg06_power(lcd
, FB_BLANK_POWERDOWN
);
552 static int ams369fg06_resume(struct spi_device
*spi
)
554 struct ams369fg06
*lcd
= dev_get_drvdata(&spi
->dev
);
556 lcd
->power
= FB_BLANK_POWERDOWN
;
558 return ams369fg06_power(lcd
, FB_BLANK_UNBLANK
);
561 #define ams369fg06_suspend NULL
562 #define ams369fg06_resume NULL
565 static void ams369fg06_shutdown(struct spi_device
*spi
)
567 struct ams369fg06
*lcd
= dev_get_drvdata(&spi
->dev
);
569 ams369fg06_power(lcd
, FB_BLANK_POWERDOWN
);
572 static struct spi_driver ams369fg06_driver
= {
574 .name
= "ams369fg06",
575 .owner
= THIS_MODULE
,
577 .probe
= ams369fg06_probe
,
578 .remove
= ams369fg06_remove
,
579 .shutdown
= ams369fg06_shutdown
,
580 .suspend
= ams369fg06_suspend
,
581 .resume
= ams369fg06_resume
,
584 module_spi_driver(ams369fg06_driver
);
586 MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
587 MODULE_DESCRIPTION("ams369fg06 LCD Driver");
588 MODULE_LICENSE("GPL");