aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb/frontends/lgdt3304.c
blob: 469ace5692c6755e8c3fc971761c64175fb1b184 (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
/*
 * Driver for LG ATSC lgdt3304 driver
 *
 * Copyright (C) 2008 Markus Rechberger <mrechberger@sundtek.de>
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
#include "dvb_frontend.h"
#include "lgdt3304.h"

static  unsigned int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,"lgdt3304 debugging (default off)");

#define dprintk(fmt, args...) if (debug) do {\
			printk("lgdt3304 debug: " fmt, ##args); } while (0)

struct lgdt3304_state
{
	struct dvb_frontend frontend;
	fe_modulation_t current_modulation;
	__u32 snr;
	__u32 current_frequency;
	__u8 addr;
	struct i2c_adapter *i2c;
};

static int i2c_write_demod_bytes (struct dvb_frontend *fe, __u8 *buf, int len)
{
	struct lgdt3304_state *state = fe->demodulator_priv;
	struct i2c_msg i2cmsgs = {
		.addr = state->addr,
		.flags = 0,
		.len = 3,
		.buf = buf
	};
	int i;
	int err;

	for (i=0; i<len-1; i+=3){
		if((err = i2c_transfer(state->i2c, &i2cmsgs, 1))<0) {
			printk("%s i2c_transfer error %d\n", __FUNCTION__, err);
			if (err < 0)
				return err;
			else
				return -EREMOTEIO;
		}
		i2cmsgs.buf += 3;
	}
	return 0;
}

static int lgdt3304_i2c_read_reg(struct dvb_frontend *fe, unsigned int reg)
{
	struct lgdt3304_state *state = fe->demodulator_priv;
	struct i2c_msg i2cmsgs[2];
	int ret;
	__u8 buf;

	__u8 regbuf[2] = { reg>>8, reg&0xff };

	i2cmsgs[0].addr = state->addr;
	i2cmsgs[0].flags = 0;
	i2cmsgs[0].len = 2;
	i2cmsgs[0].buf = regbuf;

	i2cmsgs[1].addr = state->addr;
	i2cmsgs[1].flags = I2C_M_RD;
	i2cmsgs[1].len = 1;
	i2cmsgs[1].buf = &buf;

	if((ret = i2c_transfer(state->i2c, i2cmsgs, 2))<0) {
		printk("%s i2c_transfer error %d\n", __FUNCTION__, ret);
		return ret;
	}

	return buf;
}

static int lgdt3304_i2c_write_reg(struct dvb_frontend *fe, int reg, int val)
{
	struct lgdt3304_state *state = fe->demodulator_priv;
	char buffer[3] = { reg>>8, reg&0xff, val };
	int ret;

	struct i2c_msg i2cmsgs = {
		.addr = state->addr,
		.flags = 0,
		.len = 3,
		.buf=buffer
	};
	ret = i2c_transfer(state->i2c, &i2cmsgs, 1);
	if (ret != 1) {
		printk("%s i2c_transfer error %d\n", __FUNCTION__, ret);
		return ret;
	}

	return 0;
}


static int lgdt3304_soft_Reset(struct dvb_frontend *fe)
{
	lgdt3304_i2c_write_reg(fe, 0x0002, 0x9a);
	lgdt3304_i2c_write_reg(fe, 0x0002, 0x9b);
	mdelay(200);
	return 0;
}

static int lgdt3304_set_parameters(struct dvb_frontend *fe, struct dvb_frontend_parameters *param) {
	int err = 0;

	static __u8 lgdt3304_vsb8_data[] = {
		/* 16bit  , 8bit */
		/* regs   , val  */
		0x00, 0x00, 0x02,
		0x00, 0x00, 0x13,
		0x00, 0x0d, 0x02,
		0x00, 0x0e, 0x02,
		0x00, 0x12, 0x32,
		0x00, 0x13, 0xc4,
		0x01, 0x12, 0x17,
		0x01, 0x13, 0x15,
		0x01, 0x14, 0x18,
		0x01, 0x15, 0xff,
		0x01, 0x16, 0x2c,
		0x02, 0x14, 0x67,
		0x02, 0x24, 0x8d,
		0x04, 0x27, 0x12,
		0x04, 0x28, 0x4f,
		0x03, 0x08, 0x80,
		0x03, 0x09, 0x00,
		0x03, 0x0d, 0x00,
		0x03, 0x0e, 0x1c,
		0x03, 0x14, 0xe1,
		0x05, 0x0e, 0x5b,
	};

	/* not yet tested .. */
	static __u8 lgdt3304_qam64_data[] = {
		/* 16bit  , 8bit */
		/* regs   , val  */
		0x00, 0x00, 0x18,
		0x00, 0x0d, 0x02,
		//0x00, 0x0e, 0x02,
		0x00, 0x12, 0x2a,
		0x00, 0x13, 0x00,
		0x03, 0x14, 0xe3,
		0x03, 0x0e, 0x1c,
		0x03, 0x08, 0x66,
		0x03, 0x09, 0x66,
		0x03, 0x0a, 0x08,
		0x03, 0x0b, 0x9b,
		0x05, 0x0e, 0x5b,
	};


	/* tested with KWorld a340 */
	static __u8 lgdt3304_qam256_data[] = {
		/* 16bit  , 8bit */
		/* regs   , val  */
		0x00, 0x00, 0x01,  //0x19,
		0x00, 0x12, 0x2a,
		0x00, 0x13, 0x80,
		0x00, 0x0d, 0x02,
		0x03, 0x14, 0xe3,

		0x03, 0x0e, 0x1c,
		0x03, 0x08, 0x66,
		0x03, 0x09, 0x66,
		0x03, 0x0a, 0x08,
		0x03, 0x0b, 0x9b,

		0x03, 0x0d, 0x14,
		//0x05, 0x0e, 0x5b,
		0x01, 0x06, 0x4a,
		0x01, 0x07, 0x3d,
		0x01, 0x08, 0x70,
		0x01, 0x09, 0xa3,

		0x05, 0x04, 0xfd,

		0x00, 0x0d, 0x82,

		0x05, 0x0e, 0x5b,

		0x05, 0x0e, 0x5b,

		0x00, 0x02, 0x9a,

		0x00, 0x02, 0x9b,

		0x00, 0x00, 0x01,
		0x00, 0x12, 0x2a,
		0x00, 0x13, 0x80,
		0x00, 0x0d, 0x02,
		0x03, 0x14, 0xe3,

		0x03, 0x0e, 0x1c,
		0x03, 0x08, 0x66,
		0x03, 0x09, 0x66,
		0x03, 0x0a, 0x08,
		0x03, 0x0b, 0x9b,

		0x03, 0x0d, 0x14,
		0x01, 0x06, 0x4a,
		0x01, 0x07, 0x3d,
		0x01, 0x08, 0x70,
		0x01, 0x09, 0xa3,

		0x05, 0x04, 0xfd,

		0x00, 0x0d, 0x82,

		0x05, 0x0e, 0x5b,
	};

	struct lgdt3304_state *state = fe->demodulator_priv;
	if (state->current_modulation != param->u.vsb.modulation) {
		switch(param->u.vsb.modulation) {
		case VSB_8:
			err = i2c_write_demod_bytes(fe, lgdt3304_vsb8_data,
					sizeof(lgdt3304_vsb8_data));
			break;
		case QAM_64:
			err = i2c_write_demod_bytes(fe, lgdt3304_qam64_data,
					sizeof(lgdt3304_qam64_data));
			break;
		case QAM_256:
			err = i2c_write_demod_bytes(fe, lgdt3304_qam256_data,
					sizeof(lgdt3304_qam256_data));
			break;
		default:
			break;
		}

		if (err) {
			printk("%s error setting modulation\n", __FUNCTION__);
		} else {
			state->current_modulation = param->u.vsb.modulation;
		}
	}
	state->current_frequency = param->frequency;

	lgdt3304_soft_Reset(fe);


	if (fe->ops.tuner_ops.set_params)
		fe->ops.tuner_ops.set_params(fe, param);

	return 0;
}

static int lgdt3304_init(struct dvb_frontend *fe) {
	return 0;
}

static int lgdt3304_sleep(struct dvb_frontend *fe) {
	return 0;
}


static int lgdt3304_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
	struct lgdt3304_state *state = fe->demodulator_priv;
	int r011d;
	int qam_lck;

	*status = 0;
	dprintk("lgdt read status\n");

	r011d = lgdt3304_i2c_read_reg(fe, 0x011d);

	dprintk("%02x\n", r011d);

	switch(state->current_modulation) {
	case VSB_8:
		if (r011d & 0x80) {
			dprintk("VSB Locked\n");
			*status |= FE_HAS_CARRIER;
			*status |= FE_HAS_LOCK;
			*status |= FE_HAS_SYNC;
			*status |= FE_HAS_SIGNAL;
		}
		break;
	case QAM_64:
	case QAM_256:
		qam_lck = r011d & 0x7;
		switch(qam_lck) {
			case 0x0: dprintk("Unlock\n");
				  break;
			case 0x4: dprintk("1st Lock in acquisition state\n");
				  break;
			case 0x6: dprintk("2nd Lock in acquisition state\n");
				  break;
			case 0x7: dprintk("Final Lock in good reception state\n");
				  *status |= FE_HAS_CARRIER;
				  *status |= FE_HAS_LOCK;
				  *status |= FE_HAS_SYNC;
				  *status |= FE_HAS_SIGNAL;
				  break;
		}
		break;
	default:
		printk("%s unhandled modulation\n", __FUNCTION__);
	}


	return 0;
}

static int lgdt3304_read_ber(struct dvb_frontend *fe, __u32 *ber)
{
	dprintk("read ber\n");
	return 0;
}

static int lgdt3304_read_snr(struct dvb_frontend *fe, __u16 *snr)
{
	dprintk("read snr\n");
	return 0;
}

static int lgdt3304_read_ucblocks(struct dvb_frontend *fe, __u32 *ucblocks)
{
	dprintk("read ucblocks\n");
	return 0;
}

static void lgdt3304_release(struct dvb_frontend *fe)
{
	struct lgdt3304_state *state = (struct lgdt3304_state *)fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops demod_lgdt3304={
	.info = {
		.name = "LG 3304",
		.type = FE_ATSC,
		.frequency_min = 54000000,
		.frequency_max = 858000000,
		.frequency_stepsize = 62500,
		.symbol_rate_min = 5056941,
		.symbol_rate_max = 10762000,
		.caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
	},
	.init = lgdt3304_init,
	.sleep = lgdt3304_sleep,
	.set_frontend = lgdt3304_set_parameters,
	.read_snr = lgdt3304_read_snr,
	.read_ber = lgdt3304_read_ber,
	.read_status = lgdt3304_read_status,
	.read_ucblocks = lgdt3304_read_ucblocks,
	.release = lgdt3304_release,
};

struct dvb_frontend* lgdt3304_attach(const struct lgdt3304_config *config,
					   struct i2c_adapter *i2c)
{

	struct lgdt3304_state *state;
	state = kzalloc(sizeof(struct lgdt3304_state), GFP_KERNEL);
	memset(state, 0x0, sizeof(struct lgdt3304_state));
	state->addr = config->i2c_address;
	state->i2c = i2c;

	memcpy(&state->frontend.ops, &demod_lgdt3304, sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;
	return &state->frontend;
}

EXPORT_SYMBOL_GPL(lgdt3304_attach);
MODULE_AUTHOR("Markus Rechberger <mrechberger@empiatech.com>");
MODULE_DESCRIPTION("LGE LGDT3304 DVB-T demodulator driver");
MODULE_LICENSE("GPL");