aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/dvb/ttusb-dec/ttusbdecfe.c
blob: a5a46175fa0969e302e59e75e14afa5a2e5cf2ab (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
/*
 * TTUSB DEC Frontend Driver
 *
 * Copyright (C) 2003-2004 Alex Woods <linux-dvb@giblets.org>
 *
 * 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.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include "dvb_frontend.h"
#include "ttusbdecfe.h"


#define LOF_HI			10600000
#define LOF_LO			9750000

struct ttusbdecfe_state {

	struct dvb_frontend_ops ops;

	/* configuration settings */
	const struct ttusbdecfe_config* config;

	struct dvb_frontend frontend;

	u8 hi_band;
	u8 voltage;
};


static int ttusbdecfe_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
	struct ttusbdecfe_state* state = fe->demodulator_priv;
	u8 b[] = { 0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x00 };
	u8 result[4];
	int len, ret;

	*status=0;

	ret=state->config->send_command(fe, 0x73, sizeof(b), b, &len, result);
	if(ret)
		return ret;

	if(len != 4) {
		printk(KERN_ERR "%s: unexpected reply\n", __FUNCTION__);
		return -EIO;
	}

	switch(result[3]) {
		case 1:  /* not tuned yet */
		case 2:  /* no signal/no lock*/
			break;
		case 3:	 /* signal found and locked*/
			*status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
			FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
			break;
		case 4:
			*status = FE_TIMEDOUT;
			break;
		default:
			pr_info("%s: returned unknown value: %d\n",
				__FUNCTION__, result[3]);
			return -EIO;
	}

	return 0;
}

static int ttusbdecfe_dvbt_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
	u8 b[] = { 0x00, 0x00, 0x00, 0x03,
		   0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x01,
		   0x00, 0x00, 0x00, 0xff,
		   0x00, 0x00, 0x00, 0xff };

	u32 freq = htonl(p->frequency / 1000);
	memcpy(&b[4], &freq, sizeof (u32));
	state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);

	return 0;
}

static int ttusbdecfe_dvbt_get_tune_settings(struct dvb_frontend* fe,
					struct dvb_frontend_tune_settings* fesettings)
{
		fesettings->min_delay_ms = 1500;
		/* Drift compensation makes no sense for DVB-T */
		fesettings->step_size = 0;
		fesettings->max_drift = 0;
		return 0;
}

static int ttusbdecfe_dvbs_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

	u8 b[] = { 0x00, 0x00, 0x00, 0x01,
		   0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x01,
		   0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x00 };
	u32 freq;
	u32 sym_rate;
	u32 band;
	u32 lnb_voltage;

	freq = htonl(p->frequency +
	       (state->hi_band ? LOF_HI : LOF_LO));
	memcpy(&b[4], &freq, sizeof(u32));
	sym_rate = htonl(p->u.qam.symbol_rate);
	memcpy(&b[12], &sym_rate, sizeof(u32));
	band = htonl(state->hi_band ? LOF_HI : LOF_LO);
	memcpy(&b[24], &band, sizeof(u32));
	lnb_voltage = htonl(state->voltage);
	memcpy(&b[28], &lnb_voltage, sizeof(u32));

	state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);

	return 0;
}

static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
{
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
	u8 b[] = { 0x00, 0xff, 0x00, 0x00,
		   0x00, 0x00, 0x00, 0x00,
		   0x00, 0x00 };

	memcpy(&b[4], cmd->msg, cmd->msg_len);

	state->config->send_command(fe, 0x72,
				    sizeof(b) - (6 - cmd->msg_len), b,
				    NULL, NULL);

	return 0;
}


static int ttusbdecfe_dvbs_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

	state->hi_band = (SEC_TONE_ON == tone);

	return 0;
}


static int ttusbdecfe_dvbs_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

	switch (voltage) {
	case SEC_VOLTAGE_13:
		state->voltage = 13;
		break;
	case SEC_VOLTAGE_18:
		state->voltage = 18;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

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

static struct dvb_frontend_ops ttusbdecfe_dvbt_ops;

struct dvb_frontend* ttusbdecfe_dvbt_attach(const struct ttusbdecfe_config* config)
{
	struct ttusbdecfe_state* state = NULL;

	/* allocate memory for the internal state */
	state = (struct ttusbdecfe_state*) kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
	if (state == NULL)
		return NULL;

	/* setup the state */
	state->config = config;
	memcpy(&state->ops, &ttusbdecfe_dvbt_ops, sizeof(struct dvb_frontend_ops));

	/* create dvb_frontend */
	state->frontend.ops = &state->ops;
	state->frontend.demodulator_priv = state;
	return &state->frontend;
}

static struct dvb_frontend_ops ttusbdecfe_dvbs_ops;

struct dvb_frontend* ttusbdecfe_dvbs_attach(const struct ttusbdecfe_config* config)
{
	struct ttusbdecfe_state* state = NULL;

	/* allocate memory for the internal state */
	state = (struct ttusbdecfe_state*) kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
	if (state == NULL)
		return NULL;

	/* setup the state */
	state->config = config;
	state->voltage = 0;
	state->hi_band = 0;
	memcpy(&state->ops, &ttusbdecfe_dvbs_ops, sizeof(struct dvb_frontend_ops));

	/* create dvb_frontend */
	state->frontend.ops = &state->ops;
	state->frontend.demodulator_priv = state;
	return &state->frontend;
}

static struct dvb_frontend_ops ttusbdecfe_dvbt_ops = {

	.info = {
		.name			= "TechnoTrend/Hauppauge DEC2000-t Frontend",
		.type			= FE_OFDM,
		.frequency_min		= 51000000,
		.frequency_max		= 858000000,
		.frequency_stepsize	= 62500,
		.caps =	FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
			FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
			FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
			FE_CAN_HIERARCHY_AUTO,
	},

	.release = ttusbdecfe_release,

	.set_frontend = ttusbdecfe_dvbt_set_frontend,

	.get_tune_settings = ttusbdecfe_dvbt_get_tune_settings,

	.read_status = ttusbdecfe_read_status,
};

static struct dvb_frontend_ops ttusbdecfe_dvbs_ops = {

	.info = {
		.name			= "TechnoTrend/Hauppauge DEC3000-s Frontend",
		.type			= FE_QPSK,
		.frequency_min		= 950000,
		.frequency_max		= 2150000,
		.frequency_stepsize	= 125,
		.symbol_rate_min        = 1000000,  /* guessed */
		.symbol_rate_max        = 45000000, /* guessed */
		.caps =	FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
			FE_CAN_QPSK
	},

	.release = ttusbdecfe_release,

	.set_frontend = ttusbdecfe_dvbs_set_frontend,

	.read_status = ttusbdecfe_read_status,

	.diseqc_send_master_cmd = ttusbdecfe_dvbs_diseqc_send_master_cmd,
	.set_voltage = ttusbdecfe_dvbs_set_voltage,
	.set_tone = ttusbdecfe_dvbs_set_tone,
};

MODULE_DESCRIPTION("TTUSB DEC DVB-T/S Demodulator driver");
MODULE_AUTHOR("Alex Woods/Andrew de Quincey");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(ttusbdecfe_dvbt_attach);
EXPORT_SYMBOL(ttusbdecfe_dvbs_attach);