summaryrefslogtreecommitdiffstats
path: root/drivers/media/usb/dvb-usb/vp702x-fe.c
blob: 9eb811452f2ef2f6ae96f1caaf5cdd555f522d34 (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
/* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.0
 * DVB-S receiver.
 *
 * Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de>
 *                    Metzler Brothers Systementwicklung GbR
 *
 * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@posteo.de>
 *
 * Thanks to Twinhan who kindly provided hardware and information.
 *
 * This file can be removed soon, after the DST-driver is rewritten to provice
 * the frontend-controlling separately.
 *
 *	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, version 2.
 *
 * see Documentation/media/dvb-drivers/dvb-usb.rst for more information
 *
 */
#include "vp702x.h"

struct vp702x_fe_state {
	struct dvb_frontend fe;
	struct dvb_usb_device *d;

	struct dvb_frontend_ops ops;

	enum fe_sec_voltage voltage;
	enum fe_sec_tone_mode tone_mode;

	u8 lnb_buf[8];

	u8 lock;
	u8 sig;
	u8 snr;

	unsigned long next_status_check;
	unsigned long status_check_interval;
};

static int vp702x_fe_refresh_state(struct vp702x_fe_state *st)
{
	struct vp702x_device_state *dst = st->d->priv;
	u8 *buf;

	if (time_after(jiffies, st->next_status_check)) {
		mutex_lock(&dst->buf_mutex);
		buf = dst->buf;

		vp702x_usb_in_op(st->d, READ_STATUS, 0, 0, buf, 10);
		st->lock = buf[4];

		vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x11, 0, buf, 1);
		st->snr = buf[0];

		vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x15, 0, buf, 1);
		st->sig = buf[0];

		mutex_unlock(&dst->buf_mutex);
		st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
	}
	return 0;
}

static u8 vp702x_chksum(u8 *buf,int f, int count)
{
	u8 s = 0;
	int i;
	for (i = f; i < f+count; i++)
		s += buf[i];
	return ~s+1;
}

static int vp702x_fe_read_status(struct dvb_frontend *fe,
				 enum fe_status *status)
{
	struct vp702x_fe_state *st = fe->demodulator_priv;
	vp702x_fe_refresh_state(st);
	deb_fe("%s\n",__func__);

	if (st->lock == 0)
		*status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
	else
		*status = 0;

	if (*status & FE_HAS_LOCK)
		st->status_check_interval = 1000;
	else
		st->status_check_interval = 250;
	return 0;
}

/* not supported by this Frontend */
static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
{
	struct vp702x_fe_state *st = fe->demodulator_priv;
	vp702x_fe_refresh_state(st);
	*ber = 0;
	return 0;
}

/* not supported by this Frontend */
static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
{
	struct vp702x_fe_state *st = fe->demodulator_priv;
	vp702x_fe_refresh_state(st);
	*unc = 0;
	return 0;
}

static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
{
	struct vp702x_fe_state *st = fe->demodulator_priv;
	vp702x_fe_refresh_state(st);

	*strength = (st->sig << 8) | st->sig;
	return 0;
}

static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
{
	u8 _snr;
	struct vp702x_fe_state *st = fe->demodulator_priv;
	vp702x_fe_refresh_state(st);

	_snr = (st->snr & 0x1f) * 0xff / 0x1f;
	*snr = (_snr << 8) | _snr;
	return 0;
}

static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
	deb_fe("%s\n",__func__);
	tune->min_delay_ms = 2000;
	return 0;
}

static int vp702x_fe_set_frontend(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
	struct vp702x_fe_state *st = fe->demodulator_priv;
	struct vp702x_device_state *dst = st->d->priv;
	u32 freq = fep->frequency/1000;
	/*CalFrequency*/
/*	u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */
	u64 sr;
	u8 *cmd;

	mutex_lock(&dst->buf_mutex);

	cmd = dst->buf;
	memset(cmd, 0, 10);

	cmd[0] = (freq >> 8) & 0x7f;
	cmd[1] =  freq       & 0xff;
	cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */

	sr = (u64) (fep->symbol_rate/1000) << 20;
	do_div(sr,88000);
	cmd[3] = (sr >> 12) & 0xff;
	cmd[4] = (sr >> 4)  & 0xff;
	cmd[5] = (sr << 4)  & 0xf0;

	deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n",
			fep->frequency, freq, freq, fep->symbol_rate,
			(unsigned long) sr, (unsigned long) sr);

/*	if (fep->inversion == INVERSION_ON)
		cmd[6] |= 0x80; */

	if (st->voltage == SEC_VOLTAGE_18)
		cmd[6] |= 0x40;

/*	if (fep->symbol_rate > 8000000)
		cmd[6] |= 0x20;

	if (fep->frequency < 1531000)
		cmd[6] |= 0x04;

	if (st->tone_mode == SEC_TONE_ON)
		cmd[6] |= 0x01;*/

	cmd[7] = vp702x_chksum(cmd,0,7);

	st->status_check_interval = 250;
	st->next_status_check = jiffies;

	vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);

	if (cmd[2] == 0 && cmd[3] == 0)
		deb_fe("tuning failed.\n");
	else
		deb_fe("tuning succeeded.\n");

	mutex_unlock(&dst->buf_mutex);

	return 0;
}

static int vp702x_fe_init(struct dvb_frontend *fe)
{
	struct vp702x_fe_state *st = fe->demodulator_priv;
	deb_fe("%s\n",__func__);
	vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
	return 0;
}

static int vp702x_fe_sleep(struct dvb_frontend *fe)
{
	deb_fe("%s\n",__func__);
	return 0;
}

static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
				    struct dvb_diseqc_master_cmd *m)
{
	u8 *cmd;
	struct vp702x_fe_state *st = fe->demodulator_priv;
	struct vp702x_device_state *dst = st->d->priv;

	deb_fe("%s\n",__func__);

	if (m->msg_len > 4)
		return -EINVAL;

	mutex_lock(&dst->buf_mutex);

	cmd = dst->buf;
	cmd[1] = SET_DISEQC_CMD;
	cmd[2] = m->msg_len;
	memcpy(&cmd[3], m->msg, m->msg_len);
	cmd[7] = vp702x_chksum(cmd, 0, 7);

	vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);

	if (cmd[2] == 0 && cmd[3] == 0)
		deb_fe("diseqc cmd failed.\n");
	else
		deb_fe("diseqc cmd succeeded.\n");

	mutex_unlock(&dst->buf_mutex);

	return 0;
}

static int vp702x_fe_send_diseqc_burst(struct dvb_frontend *fe,
				       enum fe_sec_mini_cmd burst)
{
	deb_fe("%s\n",__func__);
	return 0;
}

static int vp702x_fe_set_tone(struct dvb_frontend *fe,
			      enum fe_sec_tone_mode tone)
{
	struct vp702x_fe_state *st = fe->demodulator_priv;
	struct vp702x_device_state *dst = st->d->priv;
	u8 *buf;

	deb_fe("%s\n",__func__);

	st->tone_mode = tone;

	if (tone == SEC_TONE_ON)
		st->lnb_buf[2] = 0x02;
	else
		st->lnb_buf[2] = 0x00;

	st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);

	mutex_lock(&dst->buf_mutex);

	buf = dst->buf;
	memcpy(buf, st->lnb_buf, 8);

	vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
	if (buf[2] == 0 && buf[3] == 0)
		deb_fe("set_tone cmd failed.\n");
	else
		deb_fe("set_tone cmd succeeded.\n");

	mutex_unlock(&dst->buf_mutex);

	return 0;
}

static int vp702x_fe_set_voltage(struct dvb_frontend *fe,
				 enum fe_sec_voltage voltage)
{
	struct vp702x_fe_state *st = fe->demodulator_priv;
	struct vp702x_device_state *dst = st->d->priv;
	u8 *buf;
	deb_fe("%s\n",__func__);

	st->voltage = voltage;

	if (voltage != SEC_VOLTAGE_OFF)
		st->lnb_buf[4] = 0x01;
	else
		st->lnb_buf[4] = 0x00;

	st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);

	mutex_lock(&dst->buf_mutex);

	buf = dst->buf;
	memcpy(buf, st->lnb_buf, 8);

	vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
	if (buf[2] == 0 && buf[3] == 0)
		deb_fe("set_voltage cmd failed.\n");
	else
		deb_fe("set_voltage cmd succeeded.\n");

	mutex_unlock(&dst->buf_mutex);
	return 0;
}

static void vp702x_fe_release(struct dvb_frontend* fe)
{
	struct vp702x_fe_state *st = fe->demodulator_priv;
	kfree(st);
}

static const struct dvb_frontend_ops vp702x_fe_ops;

struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
{
	struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
	if (s == NULL)
		goto error;

	s->d = d;

	memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));
	s->fe.demodulator_priv = s;

	s->lnb_buf[1] = SET_LNB_POWER;
	s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */

	return &s->fe;
error:
	return NULL;
}


static const struct dvb_frontend_ops vp702x_fe_ops = {
	.delsys = { SYS_DVBS },
	.info = {
		.name           = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
		.frequency_min_hz       =  950 * MHz,
		.frequency_max_hz       = 2150 * MHz,
		.frequency_stepsize_hz  =    1 * MHz,
		.symbol_rate_min     = 1000000,
		.symbol_rate_max     = 45000000,
		.symbol_rate_tolerance = 500,  /* ppm */
		.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_QPSK |
		FE_CAN_FEC_AUTO
	},
	.release = vp702x_fe_release,

	.init  = vp702x_fe_init,
	.sleep = vp702x_fe_sleep,

	.set_frontend = vp702x_fe_set_frontend,
	.get_tune_settings = vp702x_fe_get_tune_settings,

	.read_status = vp702x_fe_read_status,
	.read_ber = vp702x_fe_read_ber,
	.read_signal_strength = vp702x_fe_read_signal_strength,
	.read_snr = vp702x_fe_read_snr,
	.read_ucblocks = vp702x_fe_read_unc_blocks,

	.diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
	.diseqc_send_burst = vp702x_fe_send_diseqc_burst,
	.set_tone = vp702x_fe_set_tone,
	.set_voltage = vp702x_fe_set_voltage,
};