aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/omap2/displays-new/panel-tpo-td043mtea1.c
blob: eadc6529fa3daac6fc429b1544a1256bea0b1f49 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
/*
 * TPO TD043MTEA1 Panel driver
 *
 * Author: Gražvydas Ignotas <notasas@gmail.com>
 * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/gpio.h>
#include <linux/err.h>
#include <linux/slab.h>

#include <video/omapdss.h>
#include <video/omap-panel-data.h>

#define TPO_R02_MODE(x)		((x) & 7)
#define TPO_R02_MODE_800x480	7
#define TPO_R02_NCLK_RISING	BIT(3)
#define TPO_R02_HSYNC_HIGH	BIT(4)
#define TPO_R02_VSYNC_HIGH	BIT(5)

#define TPO_R03_NSTANDBY	BIT(0)
#define TPO_R03_EN_CP_CLK	BIT(1)
#define TPO_R03_EN_VGL_PUMP	BIT(2)
#define TPO_R03_EN_PWM		BIT(3)
#define TPO_R03_DRIVING_CAP_100	BIT(4)
#define TPO_R03_EN_PRE_CHARGE	BIT(6)
#define TPO_R03_SOFTWARE_CTL	BIT(7)

#define TPO_R04_NFLIP_H		BIT(0)
#define TPO_R04_NFLIP_V		BIT(1)
#define TPO_R04_CP_CLK_FREQ_1H	BIT(2)
#define TPO_R04_VGL_FREQ_1H	BIT(4)

#define TPO_R03_VAL_NORMAL (TPO_R03_NSTANDBY | TPO_R03_EN_CP_CLK | \
			TPO_R03_EN_VGL_PUMP |  TPO_R03_EN_PWM | \
			TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \
			TPO_R03_SOFTWARE_CTL)

#define TPO_R03_VAL_STANDBY (TPO_R03_DRIVING_CAP_100 | \
			TPO_R03_EN_PRE_CHARGE | TPO_R03_SOFTWARE_CTL)

static const u16 tpo_td043_def_gamma[12] = {
	105, 315, 381, 431, 490, 537, 579, 686, 780, 837, 880, 1023
};

struct panel_drv_data {
	struct omap_dss_device	dssdev;
	struct omap_dss_device *in;

	struct omap_video_timings videomode;

	int data_lines;

	struct spi_device *spi;
	struct regulator *vcc_reg;
	int nreset_gpio;
	u16 gamma[12];
	u32 mode;
	u32 hmirror:1;
	u32 vmirror:1;
	u32 powered_on:1;
	u32 spi_suspended:1;
	u32 power_on_resume:1;
};

static const struct omap_video_timings tpo_td043_timings = {
	.x_res		= 800,
	.y_res		= 480,

	.pixel_clock	= 36000,

	.hsw		= 1,
	.hfp		= 68,
	.hbp		= 214,

	.vsw		= 1,
	.vfp		= 39,
	.vbp		= 34,

	.vsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
	.hsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
	.data_pclk_edge	= OMAPDSS_DRIVE_SIG_FALLING_EDGE,
	.de_level	= OMAPDSS_SIG_ACTIVE_HIGH,
	.sync_pclk_edge	= OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
};

#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)

static int tpo_td043_write(struct spi_device *spi, u8 addr, u8 data)
{
	struct spi_message	m;
	struct spi_transfer	xfer;
	u16			w;
	int			r;

	spi_message_init(&m);

	memset(&xfer, 0, sizeof(xfer));

	w = ((u16)addr << 10) | (1 << 8) | data;
	xfer.tx_buf = &w;
	xfer.bits_per_word = 16;
	xfer.len = 2;
	spi_message_add_tail(&xfer, &m);

	r = spi_sync(spi, &m);
	if (r < 0)
		dev_warn(&spi->dev, "failed to write to LCD reg (%d)\n", r);
	return r;
}

static void tpo_td043_write_gamma(struct spi_device *spi, u16 gamma[12])
{
	u8 i, val;

	/* gamma bits [9:8] */
	for (val = i = 0; i < 4; i++)
		val |= (gamma[i] & 0x300) >> ((i + 1) * 2);
	tpo_td043_write(spi, 0x11, val);

	for (val = i = 0; i < 4; i++)
		val |= (gamma[i+4] & 0x300) >> ((i + 1) * 2);
	tpo_td043_write(spi, 0x12, val);

	for (val = i = 0; i < 4; i++)
		val |= (gamma[i+8] & 0x300) >> ((i + 1) * 2);
	tpo_td043_write(spi, 0x13, val);

	/* gamma bits [7:0] */
	for (val = i = 0; i < 12; i++)
		tpo_td043_write(spi, 0x14 + i, gamma[i] & 0xff);
}

static int tpo_td043_write_mirror(struct spi_device *spi, bool h, bool v)
{
	u8 reg4 = TPO_R04_NFLIP_H | TPO_R04_NFLIP_V |
		TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H;
	if (h)
		reg4 &= ~TPO_R04_NFLIP_H;
	if (v)
		reg4 &= ~TPO_R04_NFLIP_V;

	return tpo_td043_write(spi, 4, reg4);
}

static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);

	ddata->hmirror = enable;
	return tpo_td043_write_mirror(ddata->spi, ddata->hmirror,
			ddata->vmirror);
}

static bool tpo_td043_get_hmirror(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);

	return ddata->hmirror;
}

static ssize_t tpo_td043_vmirror_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%d\n", ddata->vmirror);
}

static ssize_t tpo_td043_vmirror_store(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dev);
	int val;
	int ret;

	ret = kstrtoint(buf, 0, &val);
	if (ret < 0)
		return ret;

	val = !!val;

	ret = tpo_td043_write_mirror(ddata->spi, ddata->hmirror, val);
	if (ret < 0)
		return ret;

	ddata->vmirror = val;

	return count;
}

static ssize_t tpo_td043_mode_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%d\n", ddata->mode);
}

static ssize_t tpo_td043_mode_store(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dev);
	long val;
	int ret;

	ret = kstrtol(buf, 0, &val);
	if (ret != 0 || val & ~7)
		return -EINVAL;

	ddata->mode = val;

	val |= TPO_R02_NCLK_RISING;
	tpo_td043_write(ddata->spi, 2, val);

	return count;
}

static ssize_t tpo_td043_gamma_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dev);
	ssize_t len = 0;
	int ret;
	int i;

	for (i = 0; i < ARRAY_SIZE(ddata->gamma); i++) {
		ret = snprintf(buf + len, PAGE_SIZE - len, "%u ",
				ddata->gamma[i]);
		if (ret < 0)
			return ret;
		len += ret;
	}
	buf[len - 1] = '\n';

	return len;
}

static ssize_t tpo_td043_gamma_store(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dev);
	unsigned int g[12];
	int ret;
	int i;

	ret = sscanf(buf, "%u %u %u %u %u %u %u %u %u %u %u %u",
			&g[0], &g[1], &g[2], &g[3], &g[4], &g[5],
			&g[6], &g[7], &g[8], &g[9], &g[10], &g[11]);

	if (ret != 12)
		return -EINVAL;

	for (i = 0; i < 12; i++)
		ddata->gamma[i] = g[i];

	tpo_td043_write_gamma(ddata->spi, ddata->gamma);

	return count;
}

static DEVICE_ATTR(vmirror, S_IRUGO | S_IWUSR,
		tpo_td043_vmirror_show, tpo_td043_vmirror_store);
static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
		tpo_td043_mode_show, tpo_td043_mode_store);
static DEVICE_ATTR(gamma, S_IRUGO | S_IWUSR,
		tpo_td043_gamma_show, tpo_td043_gamma_store);

static struct attribute *tpo_td043_attrs[] = {
	&dev_attr_vmirror.attr,
	&dev_attr_mode.attr,
	&dev_attr_gamma.attr,
	NULL,
};

static struct attribute_group tpo_td043_attr_group = {
	.attrs = tpo_td043_attrs,
};

static int tpo_td043_power_on(struct panel_drv_data *ddata)
{
	int r;

	if (ddata->powered_on)
		return 0;

	r = regulator_enable(ddata->vcc_reg);
	if (r != 0)
		return r;

	/* wait for panel to stabilize */
	msleep(160);

	if (gpio_is_valid(ddata->nreset_gpio))
		gpio_set_value(ddata->nreset_gpio, 1);

	tpo_td043_write(ddata->spi, 2,
			TPO_R02_MODE(ddata->mode) | TPO_R02_NCLK_RISING);
	tpo_td043_write(ddata->spi, 3, TPO_R03_VAL_NORMAL);
	tpo_td043_write(ddata->spi, 0x20, 0xf0);
	tpo_td043_write(ddata->spi, 0x21, 0xf0);
	tpo_td043_write_mirror(ddata->spi, ddata->hmirror,
			ddata->vmirror);
	tpo_td043_write_gamma(ddata->spi, ddata->gamma);

	ddata->powered_on = 1;
	return 0;
}

static void tpo_td043_power_off(struct panel_drv_data *ddata)
{
	if (!ddata->powered_on)
		return;

	tpo_td043_write(ddata->spi, 3,
			TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);

	if (gpio_is_valid(ddata->nreset_gpio))
		gpio_set_value(ddata->nreset_gpio, 0);

	/* wait for at least 2 vsyncs before cutting off power */
	msleep(50);

	tpo_td043_write(ddata->spi, 3, TPO_R03_VAL_STANDBY);

	regulator_disable(ddata->vcc_reg);

	ddata->powered_on = 0;
}

static int tpo_td043_connect(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (omapdss_device_is_connected(dssdev))
		return 0;

	r = in->ops.dpi->connect(in, dssdev);
	if (r)
		return r;

	return 0;
}

static void tpo_td043_disconnect(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	if (!omapdss_device_is_connected(dssdev))
		return;

	in->ops.dpi->disconnect(in, dssdev);
}

static int tpo_td043_enable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (!omapdss_device_is_connected(dssdev))
		return -ENODEV;

	if (omapdss_device_is_enabled(dssdev))
		return 0;

	in->ops.dpi->set_data_lines(in, ddata->data_lines);
	in->ops.dpi->set_timings(in, &ddata->videomode);

	r = in->ops.dpi->enable(in);
	if (r)
		return r;

	/*
	 * If we are resuming from system suspend, SPI clocks might not be
	 * enabled yet, so we'll program the LCD from SPI PM resume callback.
	 */
	if (!ddata->spi_suspended) {
		r = tpo_td043_power_on(ddata);
		if (r) {
			in->ops.dpi->disable(in);
			return r;
		}
	}

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return 0;
}

static void tpo_td043_disable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	if (!omapdss_device_is_enabled(dssdev))
		return;

	in->ops.dpi->disable(in);

	if (!ddata->spi_suspended)
		tpo_td043_power_off(ddata);

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static void tpo_td043_set_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	ddata->videomode = *timings;
	dssdev->panel.timings = *timings;

	in->ops.dpi->set_timings(in, timings);
}

static void tpo_td043_get_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);

	*timings = ddata->videomode;
}

static int tpo_td043_check_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	return in->ops.dpi->check_timings(in, timings);
}

static struct omap_dss_driver tpo_td043_ops = {
	.connect	= tpo_td043_connect,
	.disconnect	= tpo_td043_disconnect,

	.enable		= tpo_td043_enable,
	.disable	= tpo_td043_disable,

	.set_timings	= tpo_td043_set_timings,
	.get_timings	= tpo_td043_get_timings,
	.check_timings	= tpo_td043_check_timings,

	.set_mirror	= tpo_td043_set_hmirror,
	.get_mirror	= tpo_td043_get_hmirror,

	.get_resolution	= omapdss_default_get_resolution,
};


static int tpo_td043_probe_pdata(struct spi_device *spi)
{
	const struct panel_tpo_td043mtea1_platform_data *pdata;
	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
	struct omap_dss_device *dssdev, *in;

	pdata = dev_get_platdata(&spi->dev);

	ddata->nreset_gpio = pdata->nreset_gpio;

	in = omap_dss_find_output(pdata->source);
	if (in == NULL) {
		dev_err(&spi->dev, "failed to find video source '%s'\n",
				pdata->source);
		return -EPROBE_DEFER;
	}
	ddata->in = in;

	ddata->data_lines = pdata->data_lines;

	dssdev = &ddata->dssdev;
	dssdev->name = pdata->name;

	return 0;
}

static int tpo_td043_probe(struct spi_device *spi)
{
	struct panel_drv_data *ddata;
	struct omap_dss_device *dssdev;
	int r;

	dev_dbg(&spi->dev, "%s\n", __func__);

	spi->bits_per_word = 16;
	spi->mode = SPI_MODE_0;

	r = spi_setup(spi);
	if (r < 0) {
		dev_err(&spi->dev, "spi_setup failed: %d\n", r);
		return r;
	}

	ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
	if (ddata == NULL)
		return -ENOMEM;

	dev_set_drvdata(&spi->dev, ddata);

	ddata->spi = spi;

	if (dev_get_platdata(&spi->dev)) {
		r = tpo_td043_probe_pdata(spi);
		if (r)
			return r;
	} else {
		return -ENODEV;
	}

	ddata->mode = TPO_R02_MODE_800x480;
	memcpy(ddata->gamma, tpo_td043_def_gamma, sizeof(ddata->gamma));

	ddata->vcc_reg = devm_regulator_get(&spi->dev, "vcc");
	if (IS_ERR(ddata->vcc_reg)) {
		dev_err(&spi->dev, "failed to get LCD VCC regulator\n");
		r = PTR_ERR(ddata->vcc_reg);
		goto err_regulator;
	}

	if (gpio_is_valid(ddata->nreset_gpio)) {
		r = devm_gpio_request_one(&spi->dev,
				ddata->nreset_gpio, GPIOF_OUT_INIT_LOW,
				"lcd reset");
		if (r < 0) {
			dev_err(&spi->dev, "couldn't request reset GPIO\n");
			goto err_gpio_req;
		}
	}

	r = sysfs_create_group(&spi->dev.kobj, &tpo_td043_attr_group);
	if (r) {
		dev_err(&spi->dev, "failed to create sysfs files\n");
		goto err_sysfs;
	}

	ddata->videomode = tpo_td043_timings;

	dssdev = &ddata->dssdev;
	dssdev->dev = &spi->dev;
	dssdev->driver = &tpo_td043_ops;
	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
	dssdev->owner = THIS_MODULE;
	dssdev->panel.timings = ddata->videomode;

	r = omapdss_register_display(dssdev);
	if (r) {
		dev_err(&spi->dev, "Failed to register panel\n");
		goto err_reg;
	}

	return 0;

err_reg:
	sysfs_remove_group(&spi->dev.kobj, &tpo_td043_attr_group);
err_sysfs:
err_gpio_req:
err_regulator:
	omap_dss_put_device(ddata->in);
	return r;
}

static int tpo_td043_remove(struct spi_device *spi)
{
	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
	struct omap_dss_device *dssdev = &ddata->dssdev;
	struct omap_dss_device *in = ddata->in;

	dev_dbg(&ddata->spi->dev, "%s\n", __func__);

	omapdss_unregister_display(dssdev);

	tpo_td043_disable(dssdev);
	tpo_td043_disconnect(dssdev);

	omap_dss_put_device(in);

	sysfs_remove_group(&spi->dev.kobj, &tpo_td043_attr_group);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int tpo_td043_spi_suspend(struct device *dev)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dev);

	dev_dbg(dev, "tpo_td043_spi_suspend, tpo %p\n", ddata);

	ddata->power_on_resume = ddata->powered_on;
	tpo_td043_power_off(ddata);
	ddata->spi_suspended = 1;

	return 0;
}

static int tpo_td043_spi_resume(struct device *dev)
{
	struct panel_drv_data *ddata = dev_get_drvdata(dev);
	int ret;

	dev_dbg(dev, "tpo_td043_spi_resume\n");

	if (ddata->power_on_resume) {
		ret = tpo_td043_power_on(ddata);
		if (ret)
			return ret;
	}
	ddata->spi_suspended = 0;

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(tpo_td043_spi_pm,
	tpo_td043_spi_suspend, tpo_td043_spi_resume);

static struct spi_driver tpo_td043_spi_driver = {
	.driver = {
		.name	= "panel-tpo-td043mtea1",
		.owner	= THIS_MODULE,
		.pm	= &tpo_td043_spi_pm,
	},
	.probe	= tpo_td043_probe,
	.remove	= tpo_td043_remove,
};

module_spi_driver(tpo_td043_spi_driver);

MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>");
MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver");
MODULE_LICENSE("GPL");