summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
blob: 0a38a0e8c925c3901da5573f8c20d3f049398c34 (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
/*
 * Toppoly TD028TTEC1 panel support
 *
 * Copyright (C) 2008 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
 *
 * Neo 1973 code (jbt6k74.c):
 * Copyright (C) 2006-2007 by OpenMoko, Inc.
 * Author: Harald Welte <laforge@openmoko.org>
 *
 * Ported and adapted from Neo 1973 U-Boot by:
 * H. Nikolaus Schaller <hns@goldelico.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/gpio.h>

#include "../dss/omapdss.h"

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

	struct videomode vm;

	struct spi_device *spi_dev;
};

static const struct videomode td028ttec1_panel_vm = {
	.hactive	= 480,
	.vactive	= 640,
	.pixelclock	= 22153000,
	.hfront_porch	= 24,
	.hsync_len	= 8,
	.hback_porch	= 8,
	.vfront_porch	= 4,
	.vsync_len	= 2,
	.vback_porch	= 2,

	.flags		= DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
			  DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_POSEDGE |
			  DISPLAY_FLAGS_PIXDATA_NEGEDGE,
	/*
	 * Note: According to the panel documentation:
	 * SYNC needs to be driven on the FALLING edge
	 */
};

#define JBT_COMMAND	0x000
#define JBT_DATA	0x100

static int jbt_ret_write_0(struct panel_drv_data *ddata, u8 reg)
{
	int rc;
	u16 tx_buf = JBT_COMMAND | reg;

	rc = spi_write(ddata->spi_dev, (u8 *)&tx_buf,
			1*sizeof(u16));
	if (rc != 0)
		dev_err(&ddata->spi_dev->dev,
			"jbt_ret_write_0 spi_write ret %d\n", rc);

	return rc;
}

static int jbt_reg_write_1(struct panel_drv_data *ddata, u8 reg, u8 data)
{
	int rc;
	u16 tx_buf[2];

	tx_buf[0] = JBT_COMMAND | reg;
	tx_buf[1] = JBT_DATA | data;
	rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
			2*sizeof(u16));
	if (rc != 0)
		dev_err(&ddata->spi_dev->dev,
			"jbt_reg_write_1 spi_write ret %d\n", rc);

	return rc;
}

static int jbt_reg_write_2(struct panel_drv_data *ddata, u8 reg, u16 data)
{
	int rc;
	u16 tx_buf[3];

	tx_buf[0] = JBT_COMMAND | reg;
	tx_buf[1] = JBT_DATA | (data >> 8);
	tx_buf[2] = JBT_DATA | (data & 0xff);

	rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
			3*sizeof(u16));

	if (rc != 0)
		dev_err(&ddata->spi_dev->dev,
			"jbt_reg_write_2 spi_write ret %d\n", rc);

	return rc;
}

enum jbt_register {
	JBT_REG_SLEEP_IN		= 0x10,
	JBT_REG_SLEEP_OUT		= 0x11,

	JBT_REG_DISPLAY_OFF		= 0x28,
	JBT_REG_DISPLAY_ON		= 0x29,

	JBT_REG_RGB_FORMAT		= 0x3a,
	JBT_REG_QUAD_RATE		= 0x3b,

	JBT_REG_POWER_ON_OFF		= 0xb0,
	JBT_REG_BOOSTER_OP		= 0xb1,
	JBT_REG_BOOSTER_MODE		= 0xb2,
	JBT_REG_BOOSTER_FREQ		= 0xb3,
	JBT_REG_OPAMP_SYSCLK		= 0xb4,
	JBT_REG_VSC_VOLTAGE		= 0xb5,
	JBT_REG_VCOM_VOLTAGE		= 0xb6,
	JBT_REG_EXT_DISPL		= 0xb7,
	JBT_REG_OUTPUT_CONTROL		= 0xb8,
	JBT_REG_DCCLK_DCEV		= 0xb9,
	JBT_REG_DISPLAY_MODE1		= 0xba,
	JBT_REG_DISPLAY_MODE2		= 0xbb,
	JBT_REG_DISPLAY_MODE		= 0xbc,
	JBT_REG_ASW_SLEW		= 0xbd,
	JBT_REG_DUMMY_DISPLAY		= 0xbe,
	JBT_REG_DRIVE_SYSTEM		= 0xbf,

	JBT_REG_SLEEP_OUT_FR_A		= 0xc0,
	JBT_REG_SLEEP_OUT_FR_B		= 0xc1,
	JBT_REG_SLEEP_OUT_FR_C		= 0xc2,
	JBT_REG_SLEEP_IN_LCCNT_D	= 0xc3,
	JBT_REG_SLEEP_IN_LCCNT_E	= 0xc4,
	JBT_REG_SLEEP_IN_LCCNT_F	= 0xc5,
	JBT_REG_SLEEP_IN_LCCNT_G	= 0xc6,

	JBT_REG_GAMMA1_FINE_1		= 0xc7,
	JBT_REG_GAMMA1_FINE_2		= 0xc8,
	JBT_REG_GAMMA1_INCLINATION	= 0xc9,
	JBT_REG_GAMMA1_BLUE_OFFSET	= 0xca,

	JBT_REG_BLANK_CONTROL		= 0xcf,
	JBT_REG_BLANK_TH_TV		= 0xd0,
	JBT_REG_CKV_ON_OFF		= 0xd1,
	JBT_REG_CKV_1_2			= 0xd2,
	JBT_REG_OEV_TIMING		= 0xd3,
	JBT_REG_ASW_TIMING_1		= 0xd4,
	JBT_REG_ASW_TIMING_2		= 0xd5,

	JBT_REG_HCLOCK_VGA		= 0xec,
	JBT_REG_HCLOCK_QVGA		= 0xed,
};

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

static int td028ttec1_panel_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 td028ttec1_panel_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 td028ttec1_panel_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_timings(in, &ddata->vm);

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

	dev_dbg(dssdev->dev, "td028ttec1_panel_enable() - state %d\n",
		dssdev->state);

	/* three times command zero */
	r |= jbt_ret_write_0(ddata, 0x00);
	usleep_range(1000, 2000);
	r |= jbt_ret_write_0(ddata, 0x00);
	usleep_range(1000, 2000);
	r |= jbt_ret_write_0(ddata, 0x00);
	usleep_range(1000, 2000);

	if (r) {
		dev_warn(dssdev->dev, "transfer error\n");
		goto transfer_err;
	}

	/* deep standby out */
	r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x17);

	/* RGB I/F on, RAM write off, QVGA through, SIGCON enable */
	r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE, 0x80);

	/* Quad mode off */
	r |= jbt_reg_write_1(ddata, JBT_REG_QUAD_RATE, 0x00);

	/* AVDD on, XVDD on */
	r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x16);

	/* Output control */
	r |= jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0xfff9);

	/* Sleep mode off */
	r |= jbt_ret_write_0(ddata, JBT_REG_SLEEP_OUT);

	/* at this point we have like 50% grey */

	/* initialize register set */
	r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE1, 0x01);
	r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE2, 0x00);
	r |= jbt_reg_write_1(ddata, JBT_REG_RGB_FORMAT, 0x60);
	r |= jbt_reg_write_1(ddata, JBT_REG_DRIVE_SYSTEM, 0x10);
	r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_OP, 0x56);
	r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_MODE, 0x33);
	r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
	r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
	r |= jbt_reg_write_1(ddata, JBT_REG_OPAMP_SYSCLK, 0x02);
	r |= jbt_reg_write_1(ddata, JBT_REG_VSC_VOLTAGE, 0x2b);
	r |= jbt_reg_write_1(ddata, JBT_REG_VCOM_VOLTAGE, 0x40);
	r |= jbt_reg_write_1(ddata, JBT_REG_EXT_DISPL, 0x03);
	r |= jbt_reg_write_1(ddata, JBT_REG_DCCLK_DCEV, 0x04);
	/*
	 * default of 0x02 in JBT_REG_ASW_SLEW responsible for 72Hz requirement
	 * to avoid red / blue flicker
	 */
	r |= jbt_reg_write_1(ddata, JBT_REG_ASW_SLEW, 0x04);
	r |= jbt_reg_write_1(ddata, JBT_REG_DUMMY_DISPLAY, 0x00);

	r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_A, 0x11);
	r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_B, 0x11);
	r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_C, 0x11);
	r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_D, 0x2040);
	r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_E, 0x60c0);
	r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_F, 0x1020);
	r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_G, 0x60c0);

	r |= jbt_reg_write_2(ddata, JBT_REG_GAMMA1_FINE_1, 0x5533);
	r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_FINE_2, 0x00);
	r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_INCLINATION, 0x00);
	r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00);

	r |= jbt_reg_write_2(ddata, JBT_REG_HCLOCK_VGA, 0x1f0);
	r |= jbt_reg_write_1(ddata, JBT_REG_BLANK_CONTROL, 0x02);
	r |= jbt_reg_write_2(ddata, JBT_REG_BLANK_TH_TV, 0x0804);

	r |= jbt_reg_write_1(ddata, JBT_REG_CKV_ON_OFF, 0x01);
	r |= jbt_reg_write_2(ddata, JBT_REG_CKV_1_2, 0x0000);

	r |= jbt_reg_write_2(ddata, JBT_REG_OEV_TIMING, 0x0d0e);
	r |= jbt_reg_write_2(ddata, JBT_REG_ASW_TIMING_1, 0x11a4);
	r |= jbt_reg_write_1(ddata, JBT_REG_ASW_TIMING_2, 0x0e);

	r |= jbt_ret_write_0(ddata, JBT_REG_DISPLAY_ON);

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

transfer_err:

	return r ? -EIO : 0;
}

static void td028ttec1_panel_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;

	dev_dbg(dssdev->dev, "td028ttec1_panel_disable()\n");

	jbt_ret_write_0(ddata, JBT_REG_DISPLAY_OFF);
	jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0x8002);
	jbt_ret_write_0(ddata, JBT_REG_SLEEP_IN);
	jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x00);

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

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static void td028ttec1_panel_set_timings(struct omap_dss_device *dssdev,
					 struct videomode *vm)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	ddata->vm = *vm;
	dssdev->panel.vm = *vm;

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

static void td028ttec1_panel_get_timings(struct omap_dss_device *dssdev,
					 struct videomode *vm)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);

	*vm = ddata->vm;
}

static int td028ttec1_panel_check_timings(struct omap_dss_device *dssdev,
					  struct videomode *vm)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

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

static struct omap_dss_driver td028ttec1_ops = {
	.connect	= td028ttec1_panel_connect,
	.disconnect	= td028ttec1_panel_disconnect,

	.enable		= td028ttec1_panel_enable,
	.disable	= td028ttec1_panel_disable,

	.set_timings	= td028ttec1_panel_set_timings,
	.get_timings	= td028ttec1_panel_get_timings,
	.check_timings	= td028ttec1_panel_check_timings,
};

static int td028ttec1_probe_of(struct spi_device *spi)
{
	struct device_node *node = spi->dev.of_node;
	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
	struct omap_dss_device *in;

	in = omapdss_of_find_source_for_first_ep(node);
	if (IS_ERR(in)) {
		dev_err(&spi->dev, "failed to find video source\n");
		return PTR_ERR(in);
	}

	ddata->in = in;

	return 0;
}

static int td028ttec1_panel_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 = 9;
	spi->mode = SPI_MODE_3;

	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_dev = spi;

	if (!spi->dev.of_node)
		return -ENODEV;

	r = td028ttec1_probe_of(spi);
	if (r)
		return r;

	ddata->vm = td028ttec1_panel_vm;

	dssdev = &ddata->dssdev;
	dssdev->dev = &spi->dev;
	dssdev->driver = &td028ttec1_ops;
	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
	dssdev->owner = THIS_MODULE;
	dssdev->panel.vm = ddata->vm;

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

	return 0;

err_reg:
	omap_dss_put_device(ddata->in);
	return r;
}

static int td028ttec1_panel_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->dev, "%s\n", __func__);

	omapdss_unregister_display(dssdev);

	td028ttec1_panel_disable(dssdev);
	td028ttec1_panel_disconnect(dssdev);

	omap_dss_put_device(in);

	return 0;
}

static const struct of_device_id td028ttec1_of_match[] = {
	{ .compatible = "omapdss,toppoly,td028ttec1", },
	{},
};

MODULE_DEVICE_TABLE(of, td028ttec1_of_match);

static struct spi_driver td028ttec1_spi_driver = {
	.probe		= td028ttec1_panel_probe,
	.remove		= td028ttec1_panel_remove,

	.driver         = {
		.name   = "panel-tpo-td028ttec1",
		.of_match_table = td028ttec1_of_match,
		.suppress_bind_attrs = true,
	},
};

module_spi_driver(td028ttec1_spi_driver);

MODULE_ALIAS("spi:toppoly,td028ttec1");
MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
MODULE_LICENSE("GPL");