aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/platform/s5p-tv/sii9234_drv.c
blob: 716d4846f8bdba7cadf04e992fc36ece0ffac226 (plain) (blame)
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
/*
 * Samsung MHL interface driver
 *
 * Copyright (C) 2011 Samsung Electronics Co.Ltd
 * Author: Tomasz Stanislawski <t.stanislaws@samsung.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/delay.h>
#include <linux/err.h>
#include <linux/freezer.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/machine.h>
#include <linux/slab.h>

#include <mach/gpio.h>
#include <plat/gpio-cfg.h>

#include <media/sii9234.h>
#include <media/v4l2-subdev.h>

MODULE_AUTHOR("Tomasz Stanislawski <t.stanislaws@samsung.com>");
MODULE_DESCRIPTION("Samsung MHL interface driver");
MODULE_LICENSE("GPL");

struct sii9234_context {
	struct i2c_client *client;
	struct regulator *power;
	int gpio_n_reset;
	struct v4l2_subdev sd;
};

static inline struct sii9234_context *sd_to_context(struct v4l2_subdev *sd)
{
	return container_of(sd, struct sii9234_context, sd);
}

static inline int sii9234_readb(struct i2c_client *client, int addr)
{
	return i2c_smbus_read_byte_data(client, addr);
}

static inline int sii9234_writeb(struct i2c_client *client, int addr, int value)
{
	return i2c_smbus_write_byte_data(client, addr, value);
}

static inline int sii9234_writeb_mask(struct i2c_client *client, int addr,
	int value, int mask)
{
	int ret;

	ret = i2c_smbus_read_byte_data(client, addr);
	if (ret < 0)
		return ret;
	ret = (ret & ~mask) | (value & mask);
	return i2c_smbus_write_byte_data(client, addr, ret);
}

static inline int sii9234_readb_idx(struct i2c_client *client, int addr)
{
	int ret;
	ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8);
	if (ret < 0)
		return ret;
	ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff);
	if (ret < 0)
		return ret;
	return i2c_smbus_read_byte_data(client, 0xbe);
}

static inline int sii9234_writeb_idx(struct i2c_client *client, int addr,
	int value)
{
	int ret;
	ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8);
	if (ret < 0)
		return ret;
	ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff);
	if (ret < 0)
		return ret;
	ret = i2c_smbus_write_byte_data(client, 0xbe, value);
	return ret;
}

static inline int sii9234_writeb_idx_mask(struct i2c_client *client, int addr,
	int value, int mask)
{
	int ret;

	ret = sii9234_readb_idx(client, addr);
	if (ret < 0)
		return ret;
	ret = (ret & ~mask) | (value & mask);
	return sii9234_writeb_idx(client, addr, ret);
}

static int sii9234_reset(struct sii9234_context *ctx)
{
	struct i2c_client *client = ctx->client;
	struct device *dev = &client->dev;
	int ret, tries;

	gpio_direction_output(ctx->gpio_n_reset, 1);
	mdelay(1);
	gpio_direction_output(ctx->gpio_n_reset, 0);
	mdelay(1);
	gpio_direction_output(ctx->gpio_n_reset, 1);
	mdelay(1);

	/* going to TTPI mode */
	ret = sii9234_writeb(client, 0xc7, 0);
	if (ret < 0) {
		dev_err(dev, "failed to set TTPI mode\n");
		return ret;
	}
	for (tries = 0; tries < 100 ; ++tries) {
		ret = sii9234_readb(client, 0x1b);
		if (ret > 0)
			break;
		if (ret < 0) {
			dev_err(dev, "failed to reset device\n");
			return -EIO;
		}
		mdelay(1);
	}
	if (tries == 100) {
		dev_err(dev, "maximal number of tries reached\n");
		return -EIO;
	}

	return 0;
}

static int sii9234_verify_version(struct i2c_client *client)
{
	struct device *dev = &client->dev;
	int family, rev, tpi_rev, dev_id, sub_id, hdcp, id;

	family = sii9234_readb(client, 0x1b);
	rev = sii9234_readb(client, 0x1c) & 0x0f;
	tpi_rev = sii9234_readb(client, 0x1d) & 0x7f;
	dev_id = sii9234_readb_idx(client, 0x0103);
	sub_id = sii9234_readb_idx(client, 0x0102);
	hdcp = sii9234_readb(client, 0x30);

	if (family < 0 || rev < 0 || tpi_rev < 0 || dev_id < 0 ||
		sub_id < 0 || hdcp < 0) {
		dev_err(dev, "failed to read chip's version\n");
		return -EIO;
	}

	id = (dev_id << 8) | sub_id;

	dev_info(dev, "chip: SiL%02x family: %02x, rev: %02x\n",
		id, family, rev);
	dev_info(dev, "tpi_rev:%02x, hdcp: %02x\n", tpi_rev, hdcp);
	if (id != 0x9234) {
		dev_err(dev, "not supported chip\n");
		return -ENODEV;
	}

	return 0;
}

static u8 data[][3] = {
/* setup from driver created by doonsoo45.kim */
	{ 0x01, 0x05, 0x04 }, /* Enable Auto soft reset on SCDT = 0 */
	{ 0x01, 0x08, 0x35 }, /* Power Up TMDS Tx Core */
	{ 0x01, 0x0d, 0x1c }, /* HDMI Transcode mode enable */
	{ 0x01, 0x2b, 0x01 }, /* Enable HDCP Compliance workaround */
	{ 0x01, 0x79, 0x40 }, /* daniel test...MHL_INT */
	{ 0x01, 0x80, 0x34 }, /* Enable Rx PLL Clock Value */
	{ 0x01, 0x90, 0x27 }, /* Enable CBUS discovery */
	{ 0x01, 0x91, 0xe5 }, /* Skip RGND detection */
	{ 0x01, 0x92, 0x46 }, /* Force MHD mode */
	{ 0x01, 0x93, 0xdc }, /* Disable CBUS pull-up during RGND measurement */
	{ 0x01, 0x94, 0x66 }, /* 1.8V CBUS VTH & GND threshold */
	{ 0x01, 0x95, 0x31 }, /* RGND block & single discovery attempt */
	{ 0x01, 0x96, 0x22 }, /* use 1K and 2K setting */
	{ 0x01, 0xa0, 0x10 }, /* SIMG: Term mode */
	{ 0x01, 0xa1, 0xfc }, /* Disable internal Mobile HD driver */
	{ 0x01, 0xa3, 0xfa }, /* SIMG: Output Swing  default EB, 3x Clk Mult */
	{ 0x01, 0xa5, 0x80 }, /* SIMG: RGND Hysterisis, 3x mode for Beast */
	{ 0x01, 0xa6, 0x0c }, /* SIMG: Swing Offset */
	{ 0x02, 0x3d, 0x3f }, /* Power up CVCC 1.2V core */
	{ 0x03, 0x00, 0x00 }, /* SIMG: correcting HW default */
	{ 0x03, 0x11, 0x01 }, /* Enable TxPLL Clock */
	{ 0x03, 0x12, 0x15 }, /* Enable Tx Clock Path & Equalizer */
	{ 0x03, 0x13, 0x60 }, /* SIMG: Set termination value */
	{ 0x03, 0x14, 0xf0 }, /* SIMG: Change CKDT level */
	{ 0x03, 0x17, 0x07 }, /* SIMG: PLL Calrefsel */
	{ 0x03, 0x1a, 0x20 }, /* VCO Cal */
	{ 0x03, 0x22, 0xe0 }, /* SIMG: Auto EQ */
	{ 0x03, 0x23, 0xc0 }, /* SIMG: Auto EQ */
	{ 0x03, 0x24, 0xa0 }, /* SIMG: Auto EQ */
	{ 0x03, 0x25, 0x80 }, /* SIMG: Auto EQ */
	{ 0x03, 0x26, 0x60 }, /* SIMG: Auto EQ */
	{ 0x03, 0x27, 0x40 }, /* SIMG: Auto EQ */
	{ 0x03, 0x28, 0x20 }, /* SIMG: Auto EQ */
	{ 0x03, 0x29, 0x00 }, /* SIMG: Auto EQ */
	{ 0x03, 0x31, 0x0b }, /* SIMG: Rx PLL BW value from I2C BW ~ 4MHz */
	{ 0x03, 0x45, 0x06 }, /* SIMG: DPLL Mode */
	{ 0x03, 0x4b, 0x06 }, /* SIMG: Correcting HW default */
	{ 0x03, 0x4c, 0xa0 }, /* Manual zone control */
	{ 0x03, 0x4d, 0x02 }, /* SIMG: PLL Mode Value (order is important) */
};

static int sii9234_set_internal(struct sii9234_context *ctx)
{
	struct i2c_client *client = ctx->client;
	int i, ret;

	for (i = 0; i < ARRAY_SIZE(data); ++i) {
		int addr = (data[i][0] << 8) | data[i][1];
		ret = sii9234_writeb_idx(client, addr, data[i][2]);
		if (ret < 0)
			return ret;
	}
	return 0;
}

static int sii9234_runtime_suspend(struct device *dev)
{
	struct v4l2_subdev *sd = dev_get_drvdata(dev);
	struct sii9234_context *ctx = sd_to_context(sd);
	struct i2c_client *client = ctx->client;

	dev_info(dev, "suspend start\n");

	sii9234_writeb_mask(client, 0x1e, 3, 3);
	regulator_disable(ctx->power);

	return 0;
}

static int sii9234_runtime_resume(struct device *dev)
{
	struct v4l2_subdev *sd = dev_get_drvdata(dev);
	struct sii9234_context *ctx = sd_to_context(sd);
	struct i2c_client *client = ctx->client;
	int ret;

	dev_info(dev, "resume start\n");
	regulator_enable(ctx->power);

	ret = sii9234_reset(ctx);
	if (ret)
		goto fail;

	/* enable tpi */
	ret = sii9234_writeb_mask(client, 0x1e, 1, 0);
	if (ret < 0)
		goto fail;
	ret = sii9234_set_internal(ctx);
	if (ret < 0)
		goto fail;

	return 0;

fail:
	dev_err(dev, "failed to resume\n");
	regulator_disable(ctx->power);

	return ret;
}

static const struct dev_pm_ops sii9234_pm_ops = {
	.runtime_suspend = sii9234_runtime_suspend,
	.runtime_resume	 = sii9234_runtime_resume,
};

static int sii9234_s_power(struct v4l2_subdev *sd, int on)
{
	struct sii9234_context *ctx = sd_to_context(sd);
	int ret;

	if (on)
		ret = pm_runtime_get_sync(&ctx->client->dev);
	else
		ret = pm_runtime_put(&ctx->client->dev);
	/* only values < 0 indicate errors */
	return IS_ERR_VALUE(ret) ? ret : 0;
}

static int sii9234_s_stream(struct v4l2_subdev *sd, int enable)
{
	struct sii9234_context *ctx = sd_to_context(sd);

	/* (dis/en)able TDMS output */
	sii9234_writeb_mask(ctx->client, 0x1a, enable ? 0 : ~0 , 1 << 4);
	return 0;
}

static const struct v4l2_subdev_core_ops sii9234_core_ops = {
	.s_power =  sii9234_s_power,
};

static const struct v4l2_subdev_video_ops sii9234_video_ops = {
	.s_stream =  sii9234_s_stream,
};

static const struct v4l2_subdev_ops sii9234_ops = {
	.core = &sii9234_core_ops,
	.video = &sii9234_video_ops,
};

static int __devinit sii9234_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct sii9234_platform_data *pdata = dev->platform_data;
	struct sii9234_context *ctx;
	int ret;

	ctx = devm_kzalloc(&client->dev, sizeof(*ctx), GFP_KERNEL);
	if (!ctx) {
		dev_err(dev, "out of memory\n");
		ret = -ENOMEM;
		goto fail;
	}
	ctx->client = client;

	ctx->power = devm_regulator_get(dev, "hdmi-en");
	if (IS_ERR(ctx->power)) {
		dev_err(dev, "failed to acquire regulator hdmi-en\n");
		return PTR_ERR(ctx->power);
	}

	ctx->gpio_n_reset = pdata->gpio_n_reset;
	ret = gpio_request(ctx->gpio_n_reset, "MHL_RST");
	if (ret) {
		dev_err(dev, "failed to acquire MHL_RST gpio\n");
		return ret;
	}

	v4l2_i2c_subdev_init(&ctx->sd, client, &sii9234_ops);

	pm_runtime_enable(dev);

	/* enable device */
	ret = pm_runtime_get_sync(dev);
	if (ret)
		goto fail_pm;

	/* verify chip version */
	ret = sii9234_verify_version(client);
	if (ret)
		goto fail_pm_get;

	/* stop processing */
	pm_runtime_put(dev);

	dev_info(dev, "probe successful\n");

	return 0;

fail_pm_get:
	pm_runtime_put_sync(dev);

fail_pm:
	pm_runtime_disable(dev);
	gpio_free(ctx->gpio_n_reset);

fail:
	dev_err(dev, "probe failed\n");

	return ret;
}

static int __devexit sii9234_remove(struct i2c_client *client)
{
	struct device *dev = &client->dev;
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct sii9234_context *ctx = sd_to_context(sd);

	pm_runtime_disable(dev);
	gpio_free(ctx->gpio_n_reset);

	dev_info(dev, "remove successful\n");

	return 0;
}


static const struct i2c_device_id sii9234_id[] = {
	{ "SII9234", 0 },
	{ },
};

MODULE_DEVICE_TABLE(i2c, sii9234_id);
static struct i2c_driver sii9234_driver = {
	.driver = {
		.name	= "sii9234",
		.owner	= THIS_MODULE,
		.pm = &sii9234_pm_ops,
	},
	.probe		= sii9234_probe,
	.remove		= __devexit_p(sii9234_remove),
	.id_table = sii9234_id,
};

module_i2c_driver(sii9234_driver);