1 /*
2 * Support for ACX565AKM LCD Panel used on Nokia N900
3 *
4 * Copyright (C) 2010 Nokia Corporation
5 *
6 * Original Driver Author: Imre Deak <imre.deak@nokia.com>
7 * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com>
8 * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.com>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * more details.
18 *
19 * You should have received a copy of the GNU General Public License along with
20 * this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/platform_device.h>
26 #include <linux/delay.h>
27 #include <linux/spi/spi.h>
28 #include <linux/jiffies.h>
29 #include <linux/sched.h>
30 #include <linux/backlight.h>
31 #include <linux/fb.h>
32
33 #include <video/omapdss.h>
34
35 #define MIPID_CMD_READ_DISP_ID 0x04
36 #define MIPID_CMD_READ_RED 0x06
37 #define MIPID_CMD_READ_GREEN 0x07
38 #define MIPID_CMD_READ_BLUE 0x08
39 #define MIPID_CMD_READ_DISP_STATUS 0x09
40 #define MIPID_CMD_RDDSDR 0x0F
41 #define MIPID_CMD_SLEEP_IN 0x10
42 #define MIPID_CMD_SLEEP_OUT 0x11
43 #define MIPID_CMD_DISP_OFF 0x28
44 #define MIPID_CMD_DISP_ON 0x29
45 #define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51
46 #define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52
47 #define MIPID_CMD_WRITE_CTRL_DISP 0x53
48
49 #define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5)
50 #define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4)
51 #define CTRL_DISP_BACKLIGHT_ON (1 << 2)
52 #define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1)
53
54 #define MIPID_CMD_READ_CTRL_DISP 0x54
55 #define MIPID_CMD_WRITE_CABC 0x55
56 #define MIPID_CMD_READ_CABC 0x56
57
58 #define MIPID_VER_LPH8923 3
59 #define MIPID_VER_LS041Y3 4
60 #define MIPID_VER_L4F00311 8
61 #define MIPID_VER_ACX565AKM 9
62
63 struct acx565akm_device {
64 char *name;
65 int enabled;
66 int model;
67 int revision;
68 u8 display_id[3];
69 unsigned has_bc:1;
70 unsigned has_cabc:1;
71 unsigned cabc_mode;
72 unsigned long hw_guard_end; /* next value of jiffies
73 when we can issue the
74 next sleep in/out command */
75 unsigned long hw_guard_wait; /* max guard time in jiffies */
76
77 struct spi_device *spi;
78 struct mutex mutex;
79
80 struct omap_dss_device *dssdev;
81 struct backlight_device *bl_dev;
82 };
83
84 static struct acx565akm_device acx_dev;
85 static int acx565akm_bl_update_status(struct backlight_device *dev);
86
87 /*--------------------MIPID interface-----------------------------*/
88
acx565akm_transfer(struct acx565akm_device * md,int cmd,const u8 * wbuf,int wlen,u8 * rbuf,int rlen)89 static void acx565akm_transfer(struct acx565akm_device *md, int cmd,
90 const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
91 {
92 struct spi_message m;
93 struct spi_transfer *x, xfer[5];
94 int r;
95
96 BUG_ON(md->spi == NULL);
97
98 spi_message_init(&m);
99
100 memset(xfer, 0, sizeof(xfer));
101 x = &xfer[0];
102
103 cmd &= 0xff;
104 x->tx_buf = &cmd;
105 x->bits_per_word = 9;
106 x->len = 2;
107
108 if (rlen > 1 && wlen == 0) {
109 /*
110 * Between the command and the response data there is a
111 * dummy clock cycle. Add an extra bit after the command
112 * word to account for this.
113 */
114 x->bits_per_word = 10;
115 cmd <<= 1;
116 }
117 spi_message_add_tail(x, &m);
118
119 if (wlen) {
120 x++;
121 x->tx_buf = wbuf;
122 x->len = wlen;
123 x->bits_per_word = 9;
124 spi_message_add_tail(x, &m);
125 }
126
127 if (rlen) {
128 x++;
129 x->rx_buf = rbuf;
130 x->len = rlen;
131 spi_message_add_tail(x, &m);
132 }
133
134 r = spi_sync(md->spi, &m);
135 if (r < 0)
136 dev_dbg(&md->spi->dev, "spi_sync %d\n", r);
137 }
138
acx565akm_cmd(struct acx565akm_device * md,int cmd)139 static inline void acx565akm_cmd(struct acx565akm_device *md, int cmd)
140 {
141 acx565akm_transfer(md, cmd, NULL, 0, NULL, 0);
142 }
143
acx565akm_write(struct acx565akm_device * md,int reg,const u8 * buf,int len)144 static inline void acx565akm_write(struct acx565akm_device *md,
145 int reg, const u8 *buf, int len)
146 {
147 acx565akm_transfer(md, reg, buf, len, NULL, 0);
148 }
149
acx565akm_read(struct acx565akm_device * md,int reg,u8 * buf,int len)150 static inline void acx565akm_read(struct acx565akm_device *md,
151 int reg, u8 *buf, int len)
152 {
153 acx565akm_transfer(md, reg, NULL, 0, buf, len);
154 }
155
hw_guard_start(struct acx565akm_device * md,int guard_msec)156 static void hw_guard_start(struct acx565akm_device *md, int guard_msec)
157 {
158 md->hw_guard_wait = msecs_to_jiffies(guard_msec);
159 md->hw_guard_end = jiffies + md->hw_guard_wait;
160 }
161
hw_guard_wait(struct acx565akm_device * md)162 static void hw_guard_wait(struct acx565akm_device *md)
163 {
164 unsigned long wait = md->hw_guard_end - jiffies;
165
166 if ((long)wait > 0 && wait <= md->hw_guard_wait) {
167 set_current_state(TASK_UNINTERRUPTIBLE);
168 schedule_timeout(wait);
169 }
170 }
171
172 /*----------------------MIPID wrappers----------------------------*/
173
set_sleep_mode(struct acx565akm_device * md,int on)174 static void set_sleep_mode(struct acx565akm_device *md, int on)
175 {
176 int cmd;
177
178 if (on)
179 cmd = MIPID_CMD_SLEEP_IN;
180 else
181 cmd = MIPID_CMD_SLEEP_OUT;
182 /*
183 * We have to keep 120msec between sleep in/out commands.
184 * (8.2.15, 8.2.16).
185 */
186 hw_guard_wait(md);
187 acx565akm_cmd(md, cmd);
188 hw_guard_start(md, 120);
189 }
190
set_display_state(struct acx565akm_device * md,int enabled)191 static void set_display_state(struct acx565akm_device *md, int enabled)
192 {
193 int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
194
195 acx565akm_cmd(md, cmd);
196 }
197
panel_enabled(struct acx565akm_device * md)198 static int panel_enabled(struct acx565akm_device *md)
199 {
200 u32 disp_status;
201 int enabled;
202
203 acx565akm_read(md, MIPID_CMD_READ_DISP_STATUS, (u8 *)&disp_status, 4);
204 disp_status = __be32_to_cpu(disp_status);
205 enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
206 dev_dbg(&md->spi->dev,
207 "LCD panel %senabled by bootloader (status 0x%04x)\n",
208 enabled ? "" : "not ", disp_status);
209 return enabled;
210 }
211
panel_detect(struct acx565akm_device * md)212 static int panel_detect(struct acx565akm_device *md)
213 {
214 acx565akm_read(md, MIPID_CMD_READ_DISP_ID, md->display_id, 3);
215 dev_dbg(&md->spi->dev, "MIPI display ID: %02x%02x%02x\n",
216 md->display_id[0], md->display_id[1], md->display_id[2]);
217
218 switch (md->display_id[0]) {
219 case 0x10:
220 md->model = MIPID_VER_ACX565AKM;
221 md->name = "acx565akm";
222 md->has_bc = 1;
223 md->has_cabc = 1;
224 break;
225 case 0x29:
226 md->model = MIPID_VER_L4F00311;
227 md->name = "l4f00311";
228 break;
229 case 0x45:
230 md->model = MIPID_VER_LPH8923;
231 md->name = "lph8923";
232 break;
233 case 0x83:
234 md->model = MIPID_VER_LS041Y3;
235 md->name = "ls041y3";
236 break;
237 default:
238 md->name = "unknown";
239 dev_err(&md->spi->dev, "invalid display ID\n");
240 return -ENODEV;
241 }
242
243 md->revision = md->display_id[1];
244
245 dev_info(&md->spi->dev, "omapfb: %s rev %02x LCD detected\n",
246 md->name, md->revision);
247
248 return 0;
249 }
250
251 /*----------------------Backlight Control-------------------------*/
252
enable_backlight_ctrl(struct acx565akm_device * md,int enable)253 static void enable_backlight_ctrl(struct acx565akm_device *md, int enable)
254 {
255 u16 ctrl;
256
257 acx565akm_read(md, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
258 if (enable) {
259 ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
260 CTRL_DISP_BACKLIGHT_ON;
261 } else {
262 ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
263 CTRL_DISP_BACKLIGHT_ON);
264 }
265
266 ctrl |= 1 << 8;
267 acx565akm_write(md, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
268 }
269
set_cabc_mode(struct acx565akm_device * md,unsigned mode)270 static void set_cabc_mode(struct acx565akm_device *md, unsigned mode)
271 {
272 u16 cabc_ctrl;
273
274 md->cabc_mode = mode;
275 if (!md->enabled)
276 return;
277 cabc_ctrl = 0;
278 acx565akm_read(md, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
279 cabc_ctrl &= ~3;
280 cabc_ctrl |= (1 << 8) | (mode & 3);
281 acx565akm_write(md, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
282 }
283
get_cabc_mode(struct acx565akm_device * md)284 static unsigned get_cabc_mode(struct acx565akm_device *md)
285 {
286 return md->cabc_mode;
287 }
288
get_hw_cabc_mode(struct acx565akm_device * md)289 static unsigned get_hw_cabc_mode(struct acx565akm_device *md)
290 {
291 u8 cabc_ctrl;
292
293 acx565akm_read(md, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
294 return cabc_ctrl & 3;
295 }
296
acx565akm_set_brightness(struct acx565akm_device * md,int level)297 static void acx565akm_set_brightness(struct acx565akm_device *md, int level)
298 {
299 int bv;
300
301 bv = level | (1 << 8);
302 acx565akm_write(md, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
303
304 if (level)
305 enable_backlight_ctrl(md, 1);
306 else
307 enable_backlight_ctrl(md, 0);
308 }
309
acx565akm_get_actual_brightness(struct acx565akm_device * md)310 static int acx565akm_get_actual_brightness(struct acx565akm_device *md)
311 {
312 u8 bv;
313
314 acx565akm_read(md, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
315
316 return bv;
317 }
318
319
acx565akm_bl_update_status(struct backlight_device * dev)320 static int acx565akm_bl_update_status(struct backlight_device *dev)
321 {
322 struct acx565akm_device *md = dev_get_drvdata(&dev->dev);
323 int r;
324 int level;
325
326 dev_dbg(&md->spi->dev, "%s\n", __func__);
327
328 mutex_lock(&md->mutex);
329
330 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
331 dev->props.power == FB_BLANK_UNBLANK)
332 level = dev->props.brightness;
333 else
334 level = 0;
335
336 r = 0;
337 if (md->has_bc)
338 acx565akm_set_brightness(md, level);
339 else if (md->dssdev->set_backlight)
340 r = md->dssdev->set_backlight(md->dssdev, level);
341 else
342 r = -ENODEV;
343
344 mutex_unlock(&md->mutex);
345
346 return r;
347 }
348
acx565akm_bl_get_intensity(struct backlight_device * dev)349 static int acx565akm_bl_get_intensity(struct backlight_device *dev)
350 {
351 struct acx565akm_device *md = dev_get_drvdata(&dev->dev);
352
353 dev_dbg(&dev->dev, "%s\n", __func__);
354
355 if (!md->has_bc && md->dssdev->set_backlight == NULL)
356 return -ENODEV;
357
358 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
359 dev->props.power == FB_BLANK_UNBLANK) {
360 if (md->has_bc)
361 return acx565akm_get_actual_brightness(md);
362 else
363 return dev->props.brightness;
364 }
365
366 return 0;
367 }
368
369 static const struct backlight_ops acx565akm_bl_ops = {
370 .get_brightness = acx565akm_bl_get_intensity,
371 .update_status = acx565akm_bl_update_status,
372 };
373
374 /*--------------------Auto Brightness control via Sysfs---------------------*/
375
376 static const char *cabc_modes[] = {
377 "off", /* always used when CABC is not supported */
378 "ui",
379 "still-image",
380 "moving-image",
381 };
382
show_cabc_mode(struct device * dev,struct device_attribute * attr,char * buf)383 static ssize_t show_cabc_mode(struct device *dev,
384 struct device_attribute *attr,
385 char *buf)
386 {
387 struct acx565akm_device *md = dev_get_drvdata(dev);
388 const char *mode_str;
389 int mode;
390 int len;
391
392 if (!md->has_cabc)
393 mode = 0;
394 else
395 mode = get_cabc_mode(md);
396 mode_str = "unknown";
397 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
398 mode_str = cabc_modes[mode];
399 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
400
401 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
402 }
403
store_cabc_mode(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)404 static ssize_t store_cabc_mode(struct device *dev,
405 struct device_attribute *attr,
406 const char *buf, size_t count)
407 {
408 struct acx565akm_device *md = dev_get_drvdata(dev);
409 int i;
410
411 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
412 const char *mode_str = cabc_modes[i];
413 int cmp_len = strlen(mode_str);
414
415 if (count > 0 && buf[count - 1] == '\n')
416 count--;
417 if (count != cmp_len)
418 continue;
419
420 if (strncmp(buf, mode_str, cmp_len) == 0)
421 break;
422 }
423
424 if (i == ARRAY_SIZE(cabc_modes))
425 return -EINVAL;
426
427 if (!md->has_cabc && i != 0)
428 return -EINVAL;
429
430 mutex_lock(&md->mutex);
431 set_cabc_mode(md, i);
432 mutex_unlock(&md->mutex);
433
434 return count;
435 }
436
show_cabc_available_modes(struct device * dev,struct device_attribute * attr,char * buf)437 static ssize_t show_cabc_available_modes(struct device *dev,
438 struct device_attribute *attr,
439 char *buf)
440 {
441 struct acx565akm_device *md = dev_get_drvdata(dev);
442 int len;
443 int i;
444
445 if (!md->has_cabc)
446 return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
447
448 for (i = 0, len = 0;
449 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
450 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
451 i ? " " : "", cabc_modes[i],
452 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
453
454 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
455 }
456
457 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
458 show_cabc_mode, store_cabc_mode);
459 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
460 show_cabc_available_modes, NULL);
461
462 static struct attribute *bldev_attrs[] = {
463 &dev_attr_cabc_mode.attr,
464 &dev_attr_cabc_available_modes.attr,
465 NULL,
466 };
467
468 static struct attribute_group bldev_attr_group = {
469 .attrs = bldev_attrs,
470 };
471
472
473 /*---------------------------ACX Panel----------------------------*/
474
acx_get_recommended_bpp(struct omap_dss_device * dssdev)475 static int acx_get_recommended_bpp(struct omap_dss_device *dssdev)
476 {
477 return 16;
478 }
479
480 static struct omap_video_timings acx_panel_timings = {
481 .x_res = 800,
482 .y_res = 480,
483 .pixel_clock = 24000,
484 .hfp = 28,
485 .hsw = 4,
486 .hbp = 24,
487 .vfp = 3,
488 .vsw = 3,
489 .vbp = 4,
490 };
491
acx_panel_probe(struct omap_dss_device * dssdev)492 static int acx_panel_probe(struct omap_dss_device *dssdev)
493 {
494 int r;
495 struct acx565akm_device *md = &acx_dev;
496 struct backlight_device *bldev;
497 int max_brightness, brightness;
498 struct backlight_properties props;
499
500 dev_dbg(&dssdev->dev, "%s\n", __func__);
501 dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
502 OMAP_DSS_LCD_IHS;
503 /* FIXME AC bias ? */
504 dssdev->panel.timings = acx_panel_timings;
505
506 if (dssdev->platform_enable)
507 dssdev->platform_enable(dssdev);
508 /*
509 * After reset we have to wait 5 msec before the first
510 * command can be sent.
511 */
512 msleep(5);
513
514 md->enabled = panel_enabled(md);
515
516 r = panel_detect(md);
517 if (r) {
518 dev_err(&dssdev->dev, "%s panel detect error\n", __func__);
519 if (!md->enabled && dssdev->platform_disable)
520 dssdev->platform_disable(dssdev);
521 return r;
522 }
523
524 mutex_lock(&acx_dev.mutex);
525 acx_dev.dssdev = dssdev;
526 mutex_unlock(&acx_dev.mutex);
527
528 if (!md->enabled) {
529 if (dssdev->platform_disable)
530 dssdev->platform_disable(dssdev);
531 }
532
533 /*------- Backlight control --------*/
534
535 props.fb_blank = FB_BLANK_UNBLANK;
536 props.power = FB_BLANK_UNBLANK;
537 props.type = BACKLIGHT_RAW;
538
539 bldev = backlight_device_register("acx565akm", &md->spi->dev,
540 md, &acx565akm_bl_ops, &props);
541 md->bl_dev = bldev;
542 if (md->has_cabc) {
543 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
544 if (r) {
545 dev_err(&bldev->dev,
546 "%s failed to create sysfs files\n", __func__);
547 backlight_device_unregister(bldev);
548 return r;
549 }
550 md->cabc_mode = get_hw_cabc_mode(md);
551 }
552
553 if (md->has_bc)
554 max_brightness = 255;
555 else
556 max_brightness = dssdev->max_backlight_level;
557
558 if (md->has_bc)
559 brightness = acx565akm_get_actual_brightness(md);
560 else if (dssdev->get_backlight)
561 brightness = dssdev->get_backlight(dssdev);
562 else
563 brightness = 0;
564
565 bldev->props.max_brightness = max_brightness;
566 bldev->props.brightness = brightness;
567
568 acx565akm_bl_update_status(bldev);
569 return 0;
570 }
571
acx_panel_remove(struct omap_dss_device * dssdev)572 static void acx_panel_remove(struct omap_dss_device *dssdev)
573 {
574 struct acx565akm_device *md = &acx_dev;
575
576 dev_dbg(&dssdev->dev, "%s\n", __func__);
577 sysfs_remove_group(&md->bl_dev->dev.kobj, &bldev_attr_group);
578 backlight_device_unregister(md->bl_dev);
579 mutex_lock(&acx_dev.mutex);
580 acx_dev.dssdev = NULL;
581 mutex_unlock(&acx_dev.mutex);
582 }
583
acx_panel_power_on(struct omap_dss_device * dssdev)584 static int acx_panel_power_on(struct omap_dss_device *dssdev)
585 {
586 struct acx565akm_device *md = &acx_dev;
587 int r;
588
589 dev_dbg(&dssdev->dev, "%s\n", __func__);
590
591 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
592 return 0;
593
594 mutex_lock(&md->mutex);
595
596 r = omapdss_sdi_display_enable(dssdev);
597 if (r) {
598 pr_err("%s sdi enable failed\n", __func__);
599 goto fail_unlock;
600 }
601
602 /*FIXME tweak me */
603 msleep(50);
604
605 if (dssdev->platform_enable) {
606 r = dssdev->platform_enable(dssdev);
607 if (r)
608 goto fail;
609 }
610
611 if (md->enabled) {
612 dev_dbg(&md->spi->dev, "panel already enabled\n");
613 mutex_unlock(&md->mutex);
614 return 0;
615 }
616
617 /*
618 * We have to meet all the following delay requirements:
619 * 1. tRW: reset pulse width 10usec (7.12.1)
620 * 2. tRT: reset cancel time 5msec (7.12.1)
621 * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
622 * case (7.6.2)
623 * 4. 120msec before the sleep out command (7.12.1)
624 */
625 msleep(120);
626
627 set_sleep_mode(md, 0);
628 md->enabled = 1;
629
630 /* 5msec between sleep out and the next command. (8.2.16) */
631 msleep(5);
632 set_display_state(md, 1);
633 set_cabc_mode(md, md->cabc_mode);
634
635 mutex_unlock(&md->mutex);
636
637 return acx565akm_bl_update_status(md->bl_dev);
638 fail:
639 omapdss_sdi_display_disable(dssdev);
640 fail_unlock:
641 mutex_unlock(&md->mutex);
642 return r;
643 }
644
acx_panel_power_off(struct omap_dss_device * dssdev)645 static void acx_panel_power_off(struct omap_dss_device *dssdev)
646 {
647 struct acx565akm_device *md = &acx_dev;
648
649 dev_dbg(&dssdev->dev, "%s\n", __func__);
650
651 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
652 return;
653
654 mutex_lock(&md->mutex);
655
656 if (!md->enabled) {
657 mutex_unlock(&md->mutex);
658 return;
659 }
660 set_display_state(md, 0);
661 set_sleep_mode(md, 1);
662 md->enabled = 0;
663 /*
664 * We have to provide PCLK,HS,VS signals for 2 frames (worst case
665 * ~50msec) after sending the sleep in command and asserting the
666 * reset signal. We probably could assert the reset w/o the delay
667 * but we still delay to avoid possible artifacts. (7.6.1)
668 */
669 msleep(50);
670
671 if (dssdev->platform_disable)
672 dssdev->platform_disable(dssdev);
673
674 /* FIXME need to tweak this delay */
675 msleep(100);
676
677 omapdss_sdi_display_disable(dssdev);
678
679 mutex_unlock(&md->mutex);
680 }
681
acx_panel_enable(struct omap_dss_device * dssdev)682 static int acx_panel_enable(struct omap_dss_device *dssdev)
683 {
684 int r;
685
686 dev_dbg(&dssdev->dev, "%s\n", __func__);
687 r = acx_panel_power_on(dssdev);
688
689 if (r)
690 return r;
691
692 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
693 return 0;
694 }
695
acx_panel_disable(struct omap_dss_device * dssdev)696 static void acx_panel_disable(struct omap_dss_device *dssdev)
697 {
698 dev_dbg(&dssdev->dev, "%s\n", __func__);
699 acx_panel_power_off(dssdev);
700 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
701 }
702
acx_panel_suspend(struct omap_dss_device * dssdev)703 static int acx_panel_suspend(struct omap_dss_device *dssdev)
704 {
705 dev_dbg(&dssdev->dev, "%s\n", __func__);
706 acx_panel_power_off(dssdev);
707 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
708 return 0;
709 }
710
acx_panel_resume(struct omap_dss_device * dssdev)711 static int acx_panel_resume(struct omap_dss_device *dssdev)
712 {
713 int r;
714
715 dev_dbg(&dssdev->dev, "%s\n", __func__);
716 r = acx_panel_power_on(dssdev);
717 if (r)
718 return r;
719
720 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
721 return 0;
722 }
723
acx_panel_set_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)724 static void acx_panel_set_timings(struct omap_dss_device *dssdev,
725 struct omap_video_timings *timings)
726 {
727 int r;
728
729 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
730 omapdss_sdi_display_disable(dssdev);
731
732 dssdev->panel.timings = *timings;
733
734 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
735 r = omapdss_sdi_display_enable(dssdev);
736 if (r)
737 dev_err(&dssdev->dev, "%s enable failed\n", __func__);
738 }
739 }
740
acx_panel_get_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)741 static void acx_panel_get_timings(struct omap_dss_device *dssdev,
742 struct omap_video_timings *timings)
743 {
744 *timings = dssdev->panel.timings;
745 }
746
acx_panel_check_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)747 static int acx_panel_check_timings(struct omap_dss_device *dssdev,
748 struct omap_video_timings *timings)
749 {
750 return 0;
751 }
752
753
754 static struct omap_dss_driver acx_panel_driver = {
755 .probe = acx_panel_probe,
756 .remove = acx_panel_remove,
757
758 .enable = acx_panel_enable,
759 .disable = acx_panel_disable,
760 .suspend = acx_panel_suspend,
761 .resume = acx_panel_resume,
762
763 .set_timings = acx_panel_set_timings,
764 .get_timings = acx_panel_get_timings,
765 .check_timings = acx_panel_check_timings,
766
767 .get_recommended_bpp = acx_get_recommended_bpp,
768
769 .driver = {
770 .name = "panel-acx565akm",
771 .owner = THIS_MODULE,
772 },
773 };
774
775 /*--------------------SPI probe-------------------------*/
776
acx565akm_spi_probe(struct spi_device * spi)777 static int acx565akm_spi_probe(struct spi_device *spi)
778 {
779 struct acx565akm_device *md = &acx_dev;
780
781 dev_dbg(&spi->dev, "%s\n", __func__);
782
783 spi->mode = SPI_MODE_3;
784 md->spi = spi;
785 mutex_init(&md->mutex);
786 dev_set_drvdata(&spi->dev, md);
787
788 omap_dss_register_driver(&acx_panel_driver);
789
790 return 0;
791 }
792
acx565akm_spi_remove(struct spi_device * spi)793 static int acx565akm_spi_remove(struct spi_device *spi)
794 {
795 struct acx565akm_device *md = dev_get_drvdata(&spi->dev);
796
797 dev_dbg(&md->spi->dev, "%s\n", __func__);
798 omap_dss_unregister_driver(&acx_panel_driver);
799
800 return 0;
801 }
802
803 static struct spi_driver acx565akm_spi_driver = {
804 .driver = {
805 .name = "acx565akm",
806 .owner = THIS_MODULE,
807 },
808 .probe = acx565akm_spi_probe,
809 .remove = __devexit_p(acx565akm_spi_remove),
810 };
811
acx565akm_init(void)812 static int __init acx565akm_init(void)
813 {
814 return spi_register_driver(&acx565akm_spi_driver);
815 }
816
acx565akm_exit(void)817 static void __exit acx565akm_exit(void)
818 {
819 spi_unregister_driver(&acx565akm_spi_driver);
820 }
821
822 module_init(acx565akm_init);
823 module_exit(acx565akm_exit);
824
825 MODULE_AUTHOR("Nokia Corporation");
826 MODULE_DESCRIPTION("acx565akm LCD Driver");
827 MODULE_LICENSE("GPL");
828