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1/*
2 * Sony ACX565AKM LCD Panel driver
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#include <linux/gpio.h>
33#include <linux/of.h>
34#include <linux/of_gpio.h>
35
36#include <video/omapdss.h>
37#include <video/omap-panel-data.h>
38
39#define MIPID_CMD_READ_DISP_ID 0x04
40#define MIPID_CMD_READ_RED 0x06
41#define MIPID_CMD_READ_GREEN 0x07
42#define MIPID_CMD_READ_BLUE 0x08
43#define MIPID_CMD_READ_DISP_STATUS 0x09
44#define MIPID_CMD_RDDSDR 0x0F
45#define MIPID_CMD_SLEEP_IN 0x10
46#define MIPID_CMD_SLEEP_OUT 0x11
47#define MIPID_CMD_DISP_OFF 0x28
48#define MIPID_CMD_DISP_ON 0x29
49#define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51
50#define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52
51#define MIPID_CMD_WRITE_CTRL_DISP 0x53
52
53#define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5)
54#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4)
55#define CTRL_DISP_BACKLIGHT_ON (1 << 2)
56#define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1)
57
58#define MIPID_CMD_READ_CTRL_DISP 0x54
59#define MIPID_CMD_WRITE_CABC 0x55
60#define MIPID_CMD_READ_CABC 0x56
61
62#define MIPID_VER_LPH8923 3
63#define MIPID_VER_LS041Y3 4
64#define MIPID_VER_L4F00311 8
65#define MIPID_VER_ACX565AKM 9
66
67struct panel_drv_data {
68 struct omap_dss_device dssdev;
69 struct omap_dss_device *in;
70
71 int reset_gpio;
72 int datapairs;
73
74 struct omap_video_timings videomode;
75
76 char *name;
77 int enabled;
78 int model;
79 int revision;
80 u8 display_id[3];
81 unsigned has_bc:1;
82 unsigned has_cabc:1;
83 unsigned cabc_mode;
84 unsigned long hw_guard_end; /* next value of jiffies
85 when we can issue the
86 next sleep in/out command */
87 unsigned long hw_guard_wait; /* max guard time in jiffies */
88
89 struct spi_device *spi;
90 struct mutex mutex;
91
92 struct backlight_device *bl_dev;
93};
94
95static const struct omap_video_timings acx565akm_panel_timings = {
96 .x_res = 800,
97 .y_res = 480,
98 .pixelclock = 24000000,
99 .hfp = 28,
100 .hsw = 4,
101 .hbp = 24,
102 .vfp = 3,
103 .vsw = 3,
104 .vbp = 4,
105
106 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
107 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
108
109 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
110 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
111 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
112};
113
114#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
115
116static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd,
117 const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
118{
119 struct spi_message m;
120 struct spi_transfer *x, xfer[5];
121 int r;
122
123 BUG_ON(ddata->spi == NULL);
124
125 spi_message_init(&m);
126
127 memset(xfer, 0, sizeof(xfer));
128 x = &xfer[0];
129
130 cmd &= 0xff;
131 x->tx_buf = &cmd;
132 x->bits_per_word = 9;
133 x->len = 2;
134
135 if (rlen > 1 && wlen == 0) {
136 /*
137 * Between the command and the response data there is a
138 * dummy clock cycle. Add an extra bit after the command
139 * word to account for this.
140 */
141 x->bits_per_word = 10;
142 cmd <<= 1;
143 }
144 spi_message_add_tail(x, &m);
145
146 if (wlen) {
147 x++;
148 x->tx_buf = wbuf;
149 x->len = wlen;
150 x->bits_per_word = 9;
151 spi_message_add_tail(x, &m);
152 }
153
154 if (rlen) {
155 x++;
156 x->rx_buf = rbuf;
157 x->len = rlen;
158 spi_message_add_tail(x, &m);
159 }
160
161 r = spi_sync(ddata->spi, &m);
162 if (r < 0)
163 dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r);
164}
165
166static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd)
167{
168 acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0);
169}
170
171static inline void acx565akm_write(struct panel_drv_data *ddata,
172 int reg, const u8 *buf, int len)
173{
174 acx565akm_transfer(ddata, reg, buf, len, NULL, 0);
175}
176
177static inline void acx565akm_read(struct panel_drv_data *ddata,
178 int reg, u8 *buf, int len)
179{
180 acx565akm_transfer(ddata, reg, NULL, 0, buf, len);
181}
182
183static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
184{
185 ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
186 ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
187}
188
189static void hw_guard_wait(struct panel_drv_data *ddata)
190{
191 unsigned long wait = ddata->hw_guard_end - jiffies;
192
193 if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
194 set_current_state(TASK_UNINTERRUPTIBLE);
195 schedule_timeout(wait);
196 }
197}
198
199static void set_sleep_mode(struct panel_drv_data *ddata, int on)
200{
201 int cmd;
202
203 if (on)
204 cmd = MIPID_CMD_SLEEP_IN;
205 else
206 cmd = MIPID_CMD_SLEEP_OUT;
207 /*
208 * We have to keep 120msec between sleep in/out commands.
209 * (8.2.15, 8.2.16).
210 */
211 hw_guard_wait(ddata);
212 acx565akm_cmd(ddata, cmd);
213 hw_guard_start(ddata, 120);
214}
215
216static void set_display_state(struct panel_drv_data *ddata, int enabled)
217{
218 int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
219
220 acx565akm_cmd(ddata, cmd);
221}
222
223static int panel_enabled(struct panel_drv_data *ddata)
224{
225 u32 disp_status;
226 int enabled;
227
228 acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS,
229 (u8 *)&disp_status, 4);
230 disp_status = __be32_to_cpu(disp_status);
231 enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
232 dev_dbg(&ddata->spi->dev,
233 "LCD panel %senabled by bootloader (status 0x%04x)\n",
234 enabled ? "" : "not ", disp_status);
235 return enabled;
236}
237
238static int panel_detect(struct panel_drv_data *ddata)
239{
240 acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3);
241 dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n",
242 ddata->display_id[0],
243 ddata->display_id[1],
244 ddata->display_id[2]);
245
246 switch (ddata->display_id[0]) {
247 case 0x10:
248 ddata->model = MIPID_VER_ACX565AKM;
249 ddata->name = "acx565akm";
250 ddata->has_bc = 1;
251 ddata->has_cabc = 1;
252 break;
253 case 0x29:
254 ddata->model = MIPID_VER_L4F00311;
255 ddata->name = "l4f00311";
256 break;
257 case 0x45:
258 ddata->model = MIPID_VER_LPH8923;
259 ddata->name = "lph8923";
260 break;
261 case 0x83:
262 ddata->model = MIPID_VER_LS041Y3;
263 ddata->name = "ls041y3";
264 break;
265 default:
266 ddata->name = "unknown";
267 dev_err(&ddata->spi->dev, "invalid display ID\n");
268 return -ENODEV;
269 }
270
271 ddata->revision = ddata->display_id[1];
272
273 dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n",
274 ddata->name, ddata->revision);
275
276 return 0;
277}
278
279/*----------------------Backlight Control-------------------------*/
280
281static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable)
282{
283 u16 ctrl;
284
285 acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
286 if (enable) {
287 ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
288 CTRL_DISP_BACKLIGHT_ON;
289 } else {
290 ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
291 CTRL_DISP_BACKLIGHT_ON);
292 }
293
294 ctrl |= 1 << 8;
295 acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
296}
297
298static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode)
299{
300 u16 cabc_ctrl;
301
302 ddata->cabc_mode = mode;
303 if (!ddata->enabled)
304 return;
305 cabc_ctrl = 0;
306 acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
307 cabc_ctrl &= ~3;
308 cabc_ctrl |= (1 << 8) | (mode & 3);
309 acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
310}
311
312static unsigned get_cabc_mode(struct panel_drv_data *ddata)
313{
314 return ddata->cabc_mode;
315}
316
317static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata)
318{
319 u8 cabc_ctrl;
320
321 acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
322 return cabc_ctrl & 3;
323}
324
325static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level)
326{
327 int bv;
328
329 bv = level | (1 << 8);
330 acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
331
332 if (level)
333 enable_backlight_ctrl(ddata, 1);
334 else
335 enable_backlight_ctrl(ddata, 0);
336}
337
338static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
339{
340 u8 bv;
341
342 acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
343
344 return bv;
345}
346
347
348static int acx565akm_bl_update_status(struct backlight_device *dev)
349{
350 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
351 int level;
352
353 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
354
355 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
356 dev->props.power == FB_BLANK_UNBLANK)
357 level = dev->props.brightness;
358 else
359 level = 0;
360
361 if (ddata->has_bc)
362 acx565akm_set_brightness(ddata, level);
363 else
364 return -ENODEV;
365
366 return 0;
367}
368
369static int acx565akm_bl_get_intensity(struct backlight_device *dev)
370{
371 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
372
373 dev_dbg(&dev->dev, "%s\n", __func__);
374
375 if (!ddata->has_bc)
376 return -ENODEV;
377
378 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
379 dev->props.power == FB_BLANK_UNBLANK) {
380 if (ddata->has_bc)
381 return acx565akm_get_actual_brightness(ddata);
382 else
383 return dev->props.brightness;
384 }
385
386 return 0;
387}
388
389static int acx565akm_bl_update_status_locked(struct backlight_device *dev)
390{
391 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
392 int r;
393
394 mutex_lock(&ddata->mutex);
395 r = acx565akm_bl_update_status(dev);
396 mutex_unlock(&ddata->mutex);
397
398 return r;
399}
400
401static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev)
402{
403 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
404 int r;
405
406 mutex_lock(&ddata->mutex);
407 r = acx565akm_bl_get_intensity(dev);
408 mutex_unlock(&ddata->mutex);
409
410 return r;
411}
412
413static const struct backlight_ops acx565akm_bl_ops = {
414 .get_brightness = acx565akm_bl_get_intensity_locked,
415 .update_status = acx565akm_bl_update_status_locked,
416};
417
418/*--------------------Auto Brightness control via Sysfs---------------------*/
419
420static const char * const cabc_modes[] = {
421 "off", /* always used when CABC is not supported */
422 "ui",
423 "still-image",
424 "moving-image",
425};
426
427static ssize_t show_cabc_mode(struct device *dev,
428 struct device_attribute *attr,
429 char *buf)
430{
431 struct panel_drv_data *ddata = dev_get_drvdata(dev);
432 const char *mode_str;
433 int mode;
434 int len;
435
436 if (!ddata->has_cabc)
437 mode = 0;
438 else
439 mode = get_cabc_mode(ddata);
440 mode_str = "unknown";
441 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
442 mode_str = cabc_modes[mode];
443 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
444
445 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
446}
447
448static ssize_t store_cabc_mode(struct device *dev,
449 struct device_attribute *attr,
450 const char *buf, size_t count)
451{
452 struct panel_drv_data *ddata = dev_get_drvdata(dev);
453 int i;
454
455 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
456 const char *mode_str = cabc_modes[i];
457 int cmp_len = strlen(mode_str);
458
459 if (count > 0 && buf[count - 1] == '\n')
460 count--;
461 if (count != cmp_len)
462 continue;
463
464 if (strncmp(buf, mode_str, cmp_len) == 0)
465 break;
466 }
467
468 if (i == ARRAY_SIZE(cabc_modes))
469 return -EINVAL;
470
471 if (!ddata->has_cabc && i != 0)
472 return -EINVAL;
473
474 mutex_lock(&ddata->mutex);
475 set_cabc_mode(ddata, i);
476 mutex_unlock(&ddata->mutex);
477
478 return count;
479}
480
481static ssize_t show_cabc_available_modes(struct device *dev,
482 struct device_attribute *attr,
483 char *buf)
484{
485 struct panel_drv_data *ddata = dev_get_drvdata(dev);
486 int len;
487 int i;
488
489 if (!ddata->has_cabc)
490 return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
491
492 for (i = 0, len = 0;
493 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
494 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
495 i ? " " : "", cabc_modes[i],
496 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
497
498 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
499}
500
501static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
502 show_cabc_mode, store_cabc_mode);
503static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
504 show_cabc_available_modes, NULL);
505
506static struct attribute *bldev_attrs[] = {
507 &dev_attr_cabc_mode.attr,
508 &dev_attr_cabc_available_modes.attr,
509 NULL,
510};
511
512static struct attribute_group bldev_attr_group = {
513 .attrs = bldev_attrs,
514};
515
516static int acx565akm_connect(struct omap_dss_device *dssdev)
517{
518 struct panel_drv_data *ddata = to_panel_data(dssdev);
519 struct omap_dss_device *in = ddata->in;
520 int r;
521
522 if (omapdss_device_is_connected(dssdev))
523 return 0;
524
525 r = in->ops.sdi->connect(in, dssdev);
526 if (r)
527 return r;
528
529 return 0;
530}
531
532static void acx565akm_disconnect(struct omap_dss_device *dssdev)
533{
534 struct panel_drv_data *ddata = to_panel_data(dssdev);
535 struct omap_dss_device *in = ddata->in;
536
537 if (!omapdss_device_is_connected(dssdev))
538 return;
539
540 in->ops.sdi->disconnect(in, dssdev);
541}
542
543static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
544{
545 struct panel_drv_data *ddata = to_panel_data(dssdev);
546 struct omap_dss_device *in = ddata->in;
547 int r;
548
549 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
550
551 in->ops.sdi->set_timings(in, &ddata->videomode);
552
553 if (ddata->datapairs > 0)
554 in->ops.sdi->set_datapairs(in, ddata->datapairs);
555
556 r = in->ops.sdi->enable(in);
557 if (r) {
558 pr_err("%s sdi enable failed\n", __func__);
559 return r;
560 }
561
562 /*FIXME tweak me */
563 msleep(50);
564
565 if (gpio_is_valid(ddata->reset_gpio))
566 gpio_set_value(ddata->reset_gpio, 1);
567
568 if (ddata->enabled) {
569 dev_dbg(&ddata->spi->dev, "panel already enabled\n");
570 return 0;
571 }
572
573 /*
574 * We have to meet all the following delay requirements:
575 * 1. tRW: reset pulse width 10usec (7.12.1)
576 * 2. tRT: reset cancel time 5msec (7.12.1)
577 * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
578 * case (7.6.2)
579 * 4. 120msec before the sleep out command (7.12.1)
580 */
581 msleep(120);
582
583 set_sleep_mode(ddata, 0);
584 ddata->enabled = 1;
585
586 /* 5msec between sleep out and the next command. (8.2.16) */
587 usleep_range(5000, 10000);
588 set_display_state(ddata, 1);
589 set_cabc_mode(ddata, ddata->cabc_mode);
590
591 return acx565akm_bl_update_status(ddata->bl_dev);
592}
593
594static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
595{
596 struct panel_drv_data *ddata = to_panel_data(dssdev);
597 struct omap_dss_device *in = ddata->in;
598
599 dev_dbg(dssdev->dev, "%s\n", __func__);
600
601 if (!ddata->enabled)
602 return;
603
604 set_display_state(ddata, 0);
605 set_sleep_mode(ddata, 1);
606 ddata->enabled = 0;
607 /*
608 * We have to provide PCLK,HS,VS signals for 2 frames (worst case
609 * ~50msec) after sending the sleep in command and asserting the
610 * reset signal. We probably could assert the reset w/o the delay
611 * but we still delay to avoid possible artifacts. (7.6.1)
612 */
613 msleep(50);
614
615 if (gpio_is_valid(ddata->reset_gpio))
616 gpio_set_value(ddata->reset_gpio, 0);
617
618 /* FIXME need to tweak this delay */
619 msleep(100);
620
621 in->ops.sdi->disable(in);
622}
623
624static int acx565akm_enable(struct omap_dss_device *dssdev)
625{
626 struct panel_drv_data *ddata = to_panel_data(dssdev);
627 int r;
628
629 dev_dbg(dssdev->dev, "%s\n", __func__);
630
631 if (!omapdss_device_is_connected(dssdev))
632 return -ENODEV;
633
634 if (omapdss_device_is_enabled(dssdev))
635 return 0;
636
637 mutex_lock(&ddata->mutex);
638 r = acx565akm_panel_power_on(dssdev);
639 mutex_unlock(&ddata->mutex);
640 if (r)
641 return r;
642
643 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
644
645 return 0;
646}
647
648static void acx565akm_disable(struct omap_dss_device *dssdev)
649{
650 struct panel_drv_data *ddata = to_panel_data(dssdev);
651
652 dev_dbg(dssdev->dev, "%s\n", __func__);
653
654 if (!omapdss_device_is_enabled(dssdev))
655 return;
656
657 mutex_lock(&ddata->mutex);
658 acx565akm_panel_power_off(dssdev);
659 mutex_unlock(&ddata->mutex);
660
661 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
662}
663
664static void acx565akm_set_timings(struct omap_dss_device *dssdev,
665 struct omap_video_timings *timings)
666{
667 struct panel_drv_data *ddata = to_panel_data(dssdev);
668 struct omap_dss_device *in = ddata->in;
669
670 ddata->videomode = *timings;
671 dssdev->panel.timings = *timings;
672
673 in->ops.sdi->set_timings(in, timings);
674}
675
676static void acx565akm_get_timings(struct omap_dss_device *dssdev,
677 struct omap_video_timings *timings)
678{
679 struct panel_drv_data *ddata = to_panel_data(dssdev);
680
681 *timings = ddata->videomode;
682}
683
684static int acx565akm_check_timings(struct omap_dss_device *dssdev,
685 struct omap_video_timings *timings)
686{
687 struct panel_drv_data *ddata = to_panel_data(dssdev);
688 struct omap_dss_device *in = ddata->in;
689
690 return in->ops.sdi->check_timings(in, timings);
691}
692
693static struct omap_dss_driver acx565akm_ops = {
694 .connect = acx565akm_connect,
695 .disconnect = acx565akm_disconnect,
696
697 .enable = acx565akm_enable,
698 .disable = acx565akm_disable,
699
700 .set_timings = acx565akm_set_timings,
701 .get_timings = acx565akm_get_timings,
702 .check_timings = acx565akm_check_timings,
703
704 .get_resolution = omapdss_default_get_resolution,
705};
706
707static int acx565akm_probe_pdata(struct spi_device *spi)
708{
709 const struct panel_acx565akm_platform_data *pdata;
710 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
711 struct omap_dss_device *dssdev, *in;
712
713 pdata = dev_get_platdata(&spi->dev);
714
715 ddata->reset_gpio = pdata->reset_gpio;
716
717 in = omap_dss_find_output(pdata->source);
718 if (in == NULL) {
719 dev_err(&spi->dev, "failed to find video source '%s'\n",
720 pdata->source);
721 return -EPROBE_DEFER;
722 }
723 ddata->in = in;
724
725 ddata->datapairs = pdata->datapairs;
726
727 dssdev = &ddata->dssdev;
728 dssdev->name = pdata->name;
729
730 return 0;
731}
732
733static int acx565akm_probe_of(struct spi_device *spi)
734{
735 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
736 struct device_node *np = spi->dev.of_node;
737
738 ddata->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
739
740 ddata->in = omapdss_of_find_source_for_first_ep(np);
741 if (IS_ERR(ddata->in)) {
742 dev_err(&spi->dev, "failed to find video source\n");
743 return PTR_ERR(ddata->in);
744 }
745
746 return 0;
747}
748
749static int acx565akm_probe(struct spi_device *spi)
750{
751 struct panel_drv_data *ddata;
752 struct omap_dss_device *dssdev;
753 struct backlight_device *bldev;
754 int max_brightness, brightness;
755 struct backlight_properties props;
756 int r;
757
758 dev_dbg(&spi->dev, "%s\n", __func__);
759
760 spi->mode = SPI_MODE_3;
761
762 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
763 if (ddata == NULL)
764 return -ENOMEM;
765
766 dev_set_drvdata(&spi->dev, ddata);
767
768 ddata->spi = spi;
769
770 mutex_init(&ddata->mutex);
771
772 if (dev_get_platdata(&spi->dev)) {
773 r = acx565akm_probe_pdata(spi);
774 if (r)
775 return r;
776 } else if (spi->dev.of_node) {
777 r = acx565akm_probe_of(spi);
778 if (r)
779 return r;
780 } else {
781 dev_err(&spi->dev, "platform data missing!\n");
782 return -ENODEV;
783 }
784
785 if (gpio_is_valid(ddata->reset_gpio)) {
786 r = devm_gpio_request_one(&spi->dev, ddata->reset_gpio,
787 GPIOF_OUT_INIT_LOW, "lcd reset");
788 if (r)
789 goto err_gpio;
790 }
791
792 if (gpio_is_valid(ddata->reset_gpio))
793 gpio_set_value(ddata->reset_gpio, 1);
794
795 /*
796 * After reset we have to wait 5 msec before the first
797 * command can be sent.
798 */
799 usleep_range(5000, 10000);
800
801 ddata->enabled = panel_enabled(ddata);
802
803 r = panel_detect(ddata);
804
805 if (!ddata->enabled && gpio_is_valid(ddata->reset_gpio))
806 gpio_set_value(ddata->reset_gpio, 0);
807
808 if (r) {
809 dev_err(&spi->dev, "%s panel detect error\n", __func__);
810 goto err_detect;
811 }
812
813 memset(&props, 0, sizeof(props));
814 props.fb_blank = FB_BLANK_UNBLANK;
815 props.power = FB_BLANK_UNBLANK;
816 props.type = BACKLIGHT_RAW;
817
818 bldev = backlight_device_register("acx565akm", &ddata->spi->dev,
819 ddata, &acx565akm_bl_ops, &props);
820 if (IS_ERR(bldev)) {
821 r = PTR_ERR(bldev);
822 goto err_reg_bl;
823 }
824 ddata->bl_dev = bldev;
825 if (ddata->has_cabc) {
826 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
827 if (r) {
828 dev_err(&bldev->dev,
829 "%s failed to create sysfs files\n", __func__);
830 goto err_sysfs;
831 }
832 ddata->cabc_mode = get_hw_cabc_mode(ddata);
833 }
834
835 max_brightness = 255;
836
837 if (ddata->has_bc)
838 brightness = acx565akm_get_actual_brightness(ddata);
839 else
840 brightness = 0;
841
842 bldev->props.max_brightness = max_brightness;
843 bldev->props.brightness = brightness;
844
845 acx565akm_bl_update_status(bldev);
846
847
848 ddata->videomode = acx565akm_panel_timings;
849
850 dssdev = &ddata->dssdev;
851 dssdev->dev = &spi->dev;
852 dssdev->driver = &acx565akm_ops;
853 dssdev->type = OMAP_DISPLAY_TYPE_SDI;
854 dssdev->owner = THIS_MODULE;
855 dssdev->panel.timings = ddata->videomode;
856
857 r = omapdss_register_display(dssdev);
858 if (r) {
859 dev_err(&spi->dev, "Failed to register panel\n");
860 goto err_reg;
861 }
862
863 return 0;
864
865err_reg:
866 sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group);
867err_sysfs:
868 backlight_device_unregister(bldev);
869err_reg_bl:
870err_detect:
871err_gpio:
872 omap_dss_put_device(ddata->in);
873 return r;
874}
875
876static int acx565akm_remove(struct spi_device *spi)
877{
878 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
879 struct omap_dss_device *dssdev = &ddata->dssdev;
880 struct omap_dss_device *in = ddata->in;
881
882 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
883
884 sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group);
885 backlight_device_unregister(ddata->bl_dev);
886
887 omapdss_unregister_display(dssdev);
888
889 acx565akm_disable(dssdev);
890 acx565akm_disconnect(dssdev);
891
892 omap_dss_put_device(in);
893
894 return 0;
895}
896
897static const struct of_device_id acx565akm_of_match[] = {
898 { .compatible = "omapdss,sony,acx565akm", },
899 {},
900};
901MODULE_DEVICE_TABLE(of, acx565akm_of_match);
902
903static struct spi_driver acx565akm_driver = {
904 .driver = {
905 .name = "acx565akm",
906 .of_match_table = acx565akm_of_match,
907 .suppress_bind_attrs = true,
908 },
909 .probe = acx565akm_probe,
910 .remove = acx565akm_remove,
911};
912
913module_spi_driver(acx565akm_driver);
914
915MODULE_AUTHOR("Nokia Corporation");
916MODULE_DESCRIPTION("acx565akm LCD Driver");
917MODULE_LICENSE("GPL");
1/*
2 * Sony ACX565AKM LCD Panel driver
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/gpio/consumer.h>
32#include <linux/of.h>
33#include <linux/of_gpio.h>
34
35#include "../dss/omapdss.h"
36
37#define MIPID_CMD_READ_DISP_ID 0x04
38#define MIPID_CMD_READ_RED 0x06
39#define MIPID_CMD_READ_GREEN 0x07
40#define MIPID_CMD_READ_BLUE 0x08
41#define MIPID_CMD_READ_DISP_STATUS 0x09
42#define MIPID_CMD_RDDSDR 0x0F
43#define MIPID_CMD_SLEEP_IN 0x10
44#define MIPID_CMD_SLEEP_OUT 0x11
45#define MIPID_CMD_DISP_OFF 0x28
46#define MIPID_CMD_DISP_ON 0x29
47#define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51
48#define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52
49#define MIPID_CMD_WRITE_CTRL_DISP 0x53
50
51#define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5)
52#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4)
53#define CTRL_DISP_BACKLIGHT_ON (1 << 2)
54#define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1)
55
56#define MIPID_CMD_READ_CTRL_DISP 0x54
57#define MIPID_CMD_WRITE_CABC 0x55
58#define MIPID_CMD_READ_CABC 0x56
59
60#define MIPID_VER_LPH8923 3
61#define MIPID_VER_LS041Y3 4
62#define MIPID_VER_L4F00311 8
63#define MIPID_VER_ACX565AKM 9
64
65struct panel_drv_data {
66 struct omap_dss_device dssdev;
67 struct omap_dss_device *in;
68
69 int reset_gpio;
70
71 struct videomode vm;
72
73 char *name;
74 int enabled;
75 int model;
76 int revision;
77 u8 display_id[3];
78 unsigned has_bc:1;
79 unsigned has_cabc:1;
80 unsigned cabc_mode;
81 unsigned long hw_guard_end; /* next value of jiffies
82 when we can issue the
83 next sleep in/out command */
84 unsigned long hw_guard_wait; /* max guard time in jiffies */
85
86 struct spi_device *spi;
87 struct mutex mutex;
88
89 struct backlight_device *bl_dev;
90};
91
92static const struct videomode acx565akm_panel_vm = {
93 .hactive = 800,
94 .vactive = 480,
95 .pixelclock = 24000000,
96 .hfront_porch = 28,
97 .hsync_len = 4,
98 .hback_porch = 24,
99 .vfront_porch = 3,
100 .vsync_len = 3,
101 .vback_porch = 4,
102
103 .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
104 DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_NEGEDGE |
105 DISPLAY_FLAGS_PIXDATA_POSEDGE,
106};
107
108#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
109
110static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd,
111 const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
112{
113 struct spi_message m;
114 struct spi_transfer *x, xfer[5];
115 int r;
116
117 BUG_ON(ddata->spi == NULL);
118
119 spi_message_init(&m);
120
121 memset(xfer, 0, sizeof(xfer));
122 x = &xfer[0];
123
124 cmd &= 0xff;
125 x->tx_buf = &cmd;
126 x->bits_per_word = 9;
127 x->len = 2;
128
129 if (rlen > 1 && wlen == 0) {
130 /*
131 * Between the command and the response data there is a
132 * dummy clock cycle. Add an extra bit after the command
133 * word to account for this.
134 */
135 x->bits_per_word = 10;
136 cmd <<= 1;
137 }
138 spi_message_add_tail(x, &m);
139
140 if (wlen) {
141 x++;
142 x->tx_buf = wbuf;
143 x->len = wlen;
144 x->bits_per_word = 9;
145 spi_message_add_tail(x, &m);
146 }
147
148 if (rlen) {
149 x++;
150 x->rx_buf = rbuf;
151 x->len = rlen;
152 spi_message_add_tail(x, &m);
153 }
154
155 r = spi_sync(ddata->spi, &m);
156 if (r < 0)
157 dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r);
158}
159
160static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd)
161{
162 acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0);
163}
164
165static inline void acx565akm_write(struct panel_drv_data *ddata,
166 int reg, const u8 *buf, int len)
167{
168 acx565akm_transfer(ddata, reg, buf, len, NULL, 0);
169}
170
171static inline void acx565akm_read(struct panel_drv_data *ddata,
172 int reg, u8 *buf, int len)
173{
174 acx565akm_transfer(ddata, reg, NULL, 0, buf, len);
175}
176
177static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
178{
179 ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
180 ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
181}
182
183static void hw_guard_wait(struct panel_drv_data *ddata)
184{
185 unsigned long wait = ddata->hw_guard_end - jiffies;
186
187 if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
188 set_current_state(TASK_UNINTERRUPTIBLE);
189 schedule_timeout(wait);
190 }
191}
192
193static void set_sleep_mode(struct panel_drv_data *ddata, int on)
194{
195 int cmd;
196
197 if (on)
198 cmd = MIPID_CMD_SLEEP_IN;
199 else
200 cmd = MIPID_CMD_SLEEP_OUT;
201 /*
202 * We have to keep 120msec between sleep in/out commands.
203 * (8.2.15, 8.2.16).
204 */
205 hw_guard_wait(ddata);
206 acx565akm_cmd(ddata, cmd);
207 hw_guard_start(ddata, 120);
208}
209
210static void set_display_state(struct panel_drv_data *ddata, int enabled)
211{
212 int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
213
214 acx565akm_cmd(ddata, cmd);
215}
216
217static int panel_enabled(struct panel_drv_data *ddata)
218{
219 __be32 v;
220 u32 disp_status;
221 int enabled;
222
223 acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS, (u8 *)&v, 4);
224 disp_status = __be32_to_cpu(v);
225 enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
226 dev_dbg(&ddata->spi->dev,
227 "LCD panel %senabled by bootloader (status 0x%04x)\n",
228 enabled ? "" : "not ", disp_status);
229 return enabled;
230}
231
232static int panel_detect(struct panel_drv_data *ddata)
233{
234 acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3);
235 dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n",
236 ddata->display_id[0],
237 ddata->display_id[1],
238 ddata->display_id[2]);
239
240 switch (ddata->display_id[0]) {
241 case 0x10:
242 ddata->model = MIPID_VER_ACX565AKM;
243 ddata->name = "acx565akm";
244 ddata->has_bc = 1;
245 ddata->has_cabc = 1;
246 break;
247 case 0x29:
248 ddata->model = MIPID_VER_L4F00311;
249 ddata->name = "l4f00311";
250 break;
251 case 0x45:
252 ddata->model = MIPID_VER_LPH8923;
253 ddata->name = "lph8923";
254 break;
255 case 0x83:
256 ddata->model = MIPID_VER_LS041Y3;
257 ddata->name = "ls041y3";
258 break;
259 default:
260 ddata->name = "unknown";
261 dev_err(&ddata->spi->dev, "invalid display ID\n");
262 return -ENODEV;
263 }
264
265 ddata->revision = ddata->display_id[1];
266
267 dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n",
268 ddata->name, ddata->revision);
269
270 return 0;
271}
272
273/*----------------------Backlight Control-------------------------*/
274
275static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable)
276{
277 u16 ctrl;
278
279 acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
280 if (enable) {
281 ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
282 CTRL_DISP_BACKLIGHT_ON;
283 } else {
284 ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
285 CTRL_DISP_BACKLIGHT_ON);
286 }
287
288 ctrl |= 1 << 8;
289 acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
290}
291
292static void set_cabc_mode(struct panel_drv_data *ddata, unsigned int mode)
293{
294 u16 cabc_ctrl;
295
296 ddata->cabc_mode = mode;
297 if (!ddata->enabled)
298 return;
299 cabc_ctrl = 0;
300 acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
301 cabc_ctrl &= ~3;
302 cabc_ctrl |= (1 << 8) | (mode & 3);
303 acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
304}
305
306static unsigned int get_cabc_mode(struct panel_drv_data *ddata)
307{
308 return ddata->cabc_mode;
309}
310
311static unsigned int get_hw_cabc_mode(struct panel_drv_data *ddata)
312{
313 u8 cabc_ctrl;
314
315 acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
316 return cabc_ctrl & 3;
317}
318
319static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level)
320{
321 int bv;
322
323 bv = level | (1 << 8);
324 acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
325
326 if (level)
327 enable_backlight_ctrl(ddata, 1);
328 else
329 enable_backlight_ctrl(ddata, 0);
330}
331
332static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
333{
334 u8 bv;
335
336 acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
337
338 return bv;
339}
340
341
342static int acx565akm_bl_update_status(struct backlight_device *dev)
343{
344 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
345 int level;
346
347 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
348
349 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
350 dev->props.power == FB_BLANK_UNBLANK)
351 level = dev->props.brightness;
352 else
353 level = 0;
354
355 if (ddata->has_bc)
356 acx565akm_set_brightness(ddata, level);
357 else
358 return -ENODEV;
359
360 return 0;
361}
362
363static int acx565akm_bl_get_intensity(struct backlight_device *dev)
364{
365 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
366
367 dev_dbg(&dev->dev, "%s\n", __func__);
368
369 if (!ddata->has_bc)
370 return -ENODEV;
371
372 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
373 dev->props.power == FB_BLANK_UNBLANK) {
374 if (ddata->has_bc)
375 return acx565akm_get_actual_brightness(ddata);
376 else
377 return dev->props.brightness;
378 }
379
380 return 0;
381}
382
383static int acx565akm_bl_update_status_locked(struct backlight_device *dev)
384{
385 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
386 int r;
387
388 mutex_lock(&ddata->mutex);
389 r = acx565akm_bl_update_status(dev);
390 mutex_unlock(&ddata->mutex);
391
392 return r;
393}
394
395static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev)
396{
397 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
398 int r;
399
400 mutex_lock(&ddata->mutex);
401 r = acx565akm_bl_get_intensity(dev);
402 mutex_unlock(&ddata->mutex);
403
404 return r;
405}
406
407static const struct backlight_ops acx565akm_bl_ops = {
408 .get_brightness = acx565akm_bl_get_intensity_locked,
409 .update_status = acx565akm_bl_update_status_locked,
410};
411
412/*--------------------Auto Brightness control via Sysfs---------------------*/
413
414static const char * const cabc_modes[] = {
415 "off", /* always used when CABC is not supported */
416 "ui",
417 "still-image",
418 "moving-image",
419};
420
421static ssize_t show_cabc_mode(struct device *dev,
422 struct device_attribute *attr,
423 char *buf)
424{
425 struct panel_drv_data *ddata = dev_get_drvdata(dev);
426 const char *mode_str;
427 int mode;
428 int len;
429
430 if (!ddata->has_cabc)
431 mode = 0;
432 else
433 mode = get_cabc_mode(ddata);
434 mode_str = "unknown";
435 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
436 mode_str = cabc_modes[mode];
437 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
438
439 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
440}
441
442static ssize_t store_cabc_mode(struct device *dev,
443 struct device_attribute *attr,
444 const char *buf, size_t count)
445{
446 struct panel_drv_data *ddata = dev_get_drvdata(dev);
447 int i;
448
449 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
450 const char *mode_str = cabc_modes[i];
451 int cmp_len = strlen(mode_str);
452
453 if (count > 0 && buf[count - 1] == '\n')
454 count--;
455 if (count != cmp_len)
456 continue;
457
458 if (strncmp(buf, mode_str, cmp_len) == 0)
459 break;
460 }
461
462 if (i == ARRAY_SIZE(cabc_modes))
463 return -EINVAL;
464
465 if (!ddata->has_cabc && i != 0)
466 return -EINVAL;
467
468 mutex_lock(&ddata->mutex);
469 set_cabc_mode(ddata, i);
470 mutex_unlock(&ddata->mutex);
471
472 return count;
473}
474
475static ssize_t show_cabc_available_modes(struct device *dev,
476 struct device_attribute *attr,
477 char *buf)
478{
479 struct panel_drv_data *ddata = dev_get_drvdata(dev);
480 int len;
481 int i;
482
483 if (!ddata->has_cabc)
484 return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
485
486 for (i = 0, len = 0;
487 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
488 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
489 i ? " " : "", cabc_modes[i],
490 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
491
492 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
493}
494
495static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
496 show_cabc_mode, store_cabc_mode);
497static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
498 show_cabc_available_modes, NULL);
499
500static struct attribute *bldev_attrs[] = {
501 &dev_attr_cabc_mode.attr,
502 &dev_attr_cabc_available_modes.attr,
503 NULL,
504};
505
506static const struct attribute_group bldev_attr_group = {
507 .attrs = bldev_attrs,
508};
509
510static int acx565akm_connect(struct omap_dss_device *dssdev)
511{
512 struct panel_drv_data *ddata = to_panel_data(dssdev);
513 struct omap_dss_device *in;
514 int r;
515
516 if (omapdss_device_is_connected(dssdev))
517 return 0;
518
519 in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
520 if (IS_ERR(in)) {
521 dev_err(dssdev->dev, "failed to find video source\n");
522 return PTR_ERR(in);
523 }
524
525 r = in->ops.sdi->connect(in, dssdev);
526 if (r) {
527 omap_dss_put_device(in);
528 return r;
529 }
530
531 ddata->in = in;
532 return 0;
533}
534
535static void acx565akm_disconnect(struct omap_dss_device *dssdev)
536{
537 struct panel_drv_data *ddata = to_panel_data(dssdev);
538 struct omap_dss_device *in = ddata->in;
539
540 if (!omapdss_device_is_connected(dssdev))
541 return;
542
543 in->ops.sdi->disconnect(in, dssdev);
544
545 omap_dss_put_device(in);
546 ddata->in = NULL;
547}
548
549static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
550{
551 struct panel_drv_data *ddata = to_panel_data(dssdev);
552 struct omap_dss_device *in = ddata->in;
553 int r;
554
555 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
556
557 in->ops.sdi->set_timings(in, &ddata->vm);
558
559 r = in->ops.sdi->enable(in);
560 if (r) {
561 pr_err("%s sdi enable failed\n", __func__);
562 return r;
563 }
564
565 /*FIXME tweak me */
566 msleep(50);
567
568 if (gpio_is_valid(ddata->reset_gpio))
569 gpio_set_value(ddata->reset_gpio, 1);
570
571 if (ddata->enabled) {
572 dev_dbg(&ddata->spi->dev, "panel already enabled\n");
573 return 0;
574 }
575
576 /*
577 * We have to meet all the following delay requirements:
578 * 1. tRW: reset pulse width 10usec (7.12.1)
579 * 2. tRT: reset cancel time 5msec (7.12.1)
580 * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
581 * case (7.6.2)
582 * 4. 120msec before the sleep out command (7.12.1)
583 */
584 msleep(120);
585
586 set_sleep_mode(ddata, 0);
587 ddata->enabled = 1;
588
589 /* 5msec between sleep out and the next command. (8.2.16) */
590 usleep_range(5000, 10000);
591 set_display_state(ddata, 1);
592 set_cabc_mode(ddata, ddata->cabc_mode);
593
594 return acx565akm_bl_update_status(ddata->bl_dev);
595}
596
597static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
598{
599 struct panel_drv_data *ddata = to_panel_data(dssdev);
600 struct omap_dss_device *in = ddata->in;
601
602 dev_dbg(dssdev->dev, "%s\n", __func__);
603
604 if (!ddata->enabled)
605 return;
606
607 set_display_state(ddata, 0);
608 set_sleep_mode(ddata, 1);
609 ddata->enabled = 0;
610 /*
611 * We have to provide PCLK,HS,VS signals for 2 frames (worst case
612 * ~50msec) after sending the sleep in command and asserting the
613 * reset signal. We probably could assert the reset w/o the delay
614 * but we still delay to avoid possible artifacts. (7.6.1)
615 */
616 msleep(50);
617
618 if (gpio_is_valid(ddata->reset_gpio))
619 gpio_set_value(ddata->reset_gpio, 0);
620
621 /* FIXME need to tweak this delay */
622 msleep(100);
623
624 in->ops.sdi->disable(in);
625}
626
627static int acx565akm_enable(struct omap_dss_device *dssdev)
628{
629 struct panel_drv_data *ddata = to_panel_data(dssdev);
630 int r;
631
632 dev_dbg(dssdev->dev, "%s\n", __func__);
633
634 if (!omapdss_device_is_connected(dssdev))
635 return -ENODEV;
636
637 if (omapdss_device_is_enabled(dssdev))
638 return 0;
639
640 mutex_lock(&ddata->mutex);
641 r = acx565akm_panel_power_on(dssdev);
642 mutex_unlock(&ddata->mutex);
643 if (r)
644 return r;
645
646 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
647
648 return 0;
649}
650
651static void acx565akm_disable(struct omap_dss_device *dssdev)
652{
653 struct panel_drv_data *ddata = to_panel_data(dssdev);
654
655 dev_dbg(dssdev->dev, "%s\n", __func__);
656
657 if (!omapdss_device_is_enabled(dssdev))
658 return;
659
660 mutex_lock(&ddata->mutex);
661 acx565akm_panel_power_off(dssdev);
662 mutex_unlock(&ddata->mutex);
663
664 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
665}
666
667static void acx565akm_set_timings(struct omap_dss_device *dssdev,
668 struct videomode *vm)
669{
670 struct panel_drv_data *ddata = to_panel_data(dssdev);
671 struct omap_dss_device *in = ddata->in;
672
673 ddata->vm = *vm;
674 dssdev->panel.vm = *vm;
675
676 in->ops.sdi->set_timings(in, vm);
677}
678
679static void acx565akm_get_timings(struct omap_dss_device *dssdev,
680 struct videomode *vm)
681{
682 struct panel_drv_data *ddata = to_panel_data(dssdev);
683
684 *vm = ddata->vm;
685}
686
687static int acx565akm_check_timings(struct omap_dss_device *dssdev,
688 struct videomode *vm)
689{
690 struct panel_drv_data *ddata = to_panel_data(dssdev);
691 struct omap_dss_device *in = ddata->in;
692
693 return in->ops.sdi->check_timings(in, vm);
694}
695
696static struct omap_dss_driver acx565akm_ops = {
697 .connect = acx565akm_connect,
698 .disconnect = acx565akm_disconnect,
699
700 .enable = acx565akm_enable,
701 .disable = acx565akm_disable,
702
703 .set_timings = acx565akm_set_timings,
704 .get_timings = acx565akm_get_timings,
705 .check_timings = acx565akm_check_timings,
706};
707
708static int acx565akm_probe_of(struct spi_device *spi)
709{
710 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
711 struct device_node *np = spi->dev.of_node;
712
713 ddata->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
714
715 return 0;
716}
717
718static int acx565akm_probe(struct spi_device *spi)
719{
720 struct panel_drv_data *ddata;
721 struct omap_dss_device *dssdev;
722 struct backlight_device *bldev;
723 int max_brightness, brightness;
724 struct backlight_properties props;
725 int r;
726
727 dev_dbg(&spi->dev, "%s\n", __func__);
728
729 spi->mode = SPI_MODE_3;
730
731 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
732 if (ddata == NULL)
733 return -ENOMEM;
734
735 dev_set_drvdata(&spi->dev, ddata);
736
737 ddata->spi = spi;
738
739 mutex_init(&ddata->mutex);
740
741 r = acx565akm_probe_of(spi);
742 if (r)
743 return r;
744
745 if (gpio_is_valid(ddata->reset_gpio)) {
746 r = devm_gpio_request_one(&spi->dev, ddata->reset_gpio,
747 GPIOF_OUT_INIT_LOW, "lcd reset");
748 if (r)
749 goto err_gpio;
750 }
751
752 if (gpio_is_valid(ddata->reset_gpio))
753 gpio_set_value(ddata->reset_gpio, 1);
754
755 /*
756 * After reset we have to wait 5 msec before the first
757 * command can be sent.
758 */
759 usleep_range(5000, 10000);
760
761 ddata->enabled = panel_enabled(ddata);
762
763 r = panel_detect(ddata);
764
765 if (!ddata->enabled && gpio_is_valid(ddata->reset_gpio))
766 gpio_set_value(ddata->reset_gpio, 0);
767
768 if (r) {
769 dev_err(&spi->dev, "%s panel detect error\n", __func__);
770 goto err_detect;
771 }
772
773 memset(&props, 0, sizeof(props));
774 props.fb_blank = FB_BLANK_UNBLANK;
775 props.power = FB_BLANK_UNBLANK;
776 props.type = BACKLIGHT_RAW;
777
778 bldev = backlight_device_register("acx565akm", &ddata->spi->dev,
779 ddata, &acx565akm_bl_ops, &props);
780 if (IS_ERR(bldev)) {
781 r = PTR_ERR(bldev);
782 goto err_reg_bl;
783 }
784 ddata->bl_dev = bldev;
785 if (ddata->has_cabc) {
786 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
787 if (r) {
788 dev_err(&bldev->dev,
789 "%s failed to create sysfs files\n", __func__);
790 goto err_sysfs;
791 }
792 ddata->cabc_mode = get_hw_cabc_mode(ddata);
793 }
794
795 max_brightness = 255;
796
797 if (ddata->has_bc)
798 brightness = acx565akm_get_actual_brightness(ddata);
799 else
800 brightness = 0;
801
802 bldev->props.max_brightness = max_brightness;
803 bldev->props.brightness = brightness;
804
805 acx565akm_bl_update_status(bldev);
806
807
808 ddata->vm = acx565akm_panel_vm;
809
810 dssdev = &ddata->dssdev;
811 dssdev->dev = &spi->dev;
812 dssdev->driver = &acx565akm_ops;
813 dssdev->type = OMAP_DISPLAY_TYPE_SDI;
814 dssdev->owner = THIS_MODULE;
815 dssdev->panel.vm = ddata->vm;
816
817 r = omapdss_register_display(dssdev);
818 if (r) {
819 dev_err(&spi->dev, "Failed to register panel\n");
820 goto err_reg;
821 }
822
823 return 0;
824
825err_reg:
826 sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group);
827err_sysfs:
828 backlight_device_unregister(bldev);
829err_reg_bl:
830err_detect:
831err_gpio:
832 return r;
833}
834
835static int acx565akm_remove(struct spi_device *spi)
836{
837 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
838 struct omap_dss_device *dssdev = &ddata->dssdev;
839
840 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
841
842 sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group);
843 backlight_device_unregister(ddata->bl_dev);
844
845 omapdss_unregister_display(dssdev);
846
847 acx565akm_disable(dssdev);
848 acx565akm_disconnect(dssdev);
849
850 return 0;
851}
852
853static const struct of_device_id acx565akm_of_match[] = {
854 { .compatible = "omapdss,sony,acx565akm", },
855 {},
856};
857MODULE_DEVICE_TABLE(of, acx565akm_of_match);
858
859static struct spi_driver acx565akm_driver = {
860 .driver = {
861 .name = "acx565akm",
862 .of_match_table = acx565akm_of_match,
863 .suppress_bind_attrs = true,
864 },
865 .probe = acx565akm_probe,
866 .remove = acx565akm_remove,
867};
868
869module_spi_driver(acx565akm_driver);
870
871MODULE_ALIAS("spi:sony,acx565akm");
872MODULE_AUTHOR("Nokia Corporation");
873MODULE_DESCRIPTION("acx565akm LCD Driver");
874MODULE_LICENSE("GPL");