summaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb/dvb-usb/gp8psk-fe.c
blob: 6ccbdc9cd7725a58c444f9275d67a86f7c9a5c09 (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
/* DVB USB compliant Linux driver for the
 *  - GENPIX 8pks/qpsk USB2.0 DVB-S module
 *
 * Copyright (C) 2006 Alan Nisota (alannisota@gmail.com)
 *
 * Thanks to GENPIX for the sample code used to implement this module.
 *
 * This module is based off the vp7045 and vp702x modules
 *
 *	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/dvb/README.dvb-usb for more information
 */
#include "gp8psk.h"

struct gp8psk_fe_state {
	struct dvb_frontend fe;

	struct dvb_usb_device *d;

	u16 snr;

	unsigned long next_snr_check;
};

static int gp8psk_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
{
	struct gp8psk_fe_state *st = fe->demodulator_priv;
	u8 lock;

	if (gp8psk_usb_in_op(st->d, GET_SIGNAL_LOCK, 0, 0, &lock,1))
		return -EINVAL;

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

	return 0;
}

/* not supported by this Frontend */
static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
{
	(void) fe;
	*ber = 0;
	return 0;
}

/* not supported by this Frontend */
static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
{
	(void) fe;
	*unc = 0;
	return 0;
}

static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
{
	struct gp8psk_fe_state *st = fe->demodulator_priv;
	u8 buf[2];

	if (time_after(jiffies,st->next_snr_check)) {
		gp8psk_usb_in_op(st->d,GET_SIGNAL_STRENGTH,0,0,buf,2);
		*snr = (int)(buf[1]) << 8 | buf[0];
		/* snr is reported in dBu*256 */
		/* snr / 38.4 ~= 100% strength */
		/* snr * 17 returns 100% strength as 65535 */
		if (*snr <= 3855)
			*snr = (*snr<<4) + *snr; // snr * 17
		else
			*snr = 65535;
		st->next_snr_check = jiffies + (10*HZ)/1000;
	} else {
		*snr = st->snr;
	}
	return 0;
}

static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
{
	return gp8psk_fe_read_snr(fe, strength);
}

static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
	tune->min_delay_ms = 800;
	return 0;
}

static int gp8psk_fe_set_frontend(struct dvb_frontend* fe,
				  struct dvb_frontend_parameters *fep)
{
	struct gp8psk_fe_state *state = fe->demodulator_priv;
	u8 cmd[10];
	u32 freq = fep->frequency * 1000;

	cmd[4] = freq         & 0xff;
	cmd[5] = (freq >> 8)  & 0xff;
	cmd[6] = (freq >> 16) & 0xff;
	cmd[7] = (freq >> 24) & 0xff;

	switch(fe->ops.info.type) {
	case FE_QPSK:
		cmd[0] =  fep->u.qpsk.symbol_rate        & 0xff;
		cmd[1] = (fep->u.qpsk.symbol_rate >>  8) & 0xff;
		cmd[2] = (fep->u.qpsk.symbol_rate >> 16) & 0xff;
		cmd[3] = (fep->u.qpsk.symbol_rate >> 24) & 0xff;
		cmd[8] = ADV_MOD_DVB_QPSK;
		cmd[9] = 0x03; /*ADV_MOD_FEC_XXX*/
		break;
	default:
		// other modes are unsuported right now
		cmd[0] = 0;
		cmd[1] = 0;
		cmd[2] = 0;
		cmd[3] = 0;
		cmd[8] = 0;
		cmd[9] = 0;
		break;
	}

	gp8psk_usb_out_op(state->d,TUNE_8PSK,0,0,cmd,10);

	state->next_snr_check = jiffies;

	return 0;
}

static int gp8psk_fe_get_frontend(struct dvb_frontend* fe,
				  struct dvb_frontend_parameters *fep)
{
	return 0;
}


static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe,
				    struct dvb_diseqc_master_cmd *m)
{
	struct gp8psk_fe_state *st = fe->demodulator_priv;

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

	if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, m->msg[0], 0,
			m->msg, m->msg_len)) {
		return -EINVAL;
	}
	return 0;
}

static int gp8psk_fe_send_diseqc_burst (struct dvb_frontend* fe,
				    fe_sec_mini_cmd_t burst)
{
	struct gp8psk_fe_state *st = fe->demodulator_priv;
	u8 cmd;

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

	/* These commands are certainly wrong */
	cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;

	if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, cmd, 0,
			&cmd, 0)) {
		return -EINVAL;
	}
	return 0;
}

static int gp8psk_fe_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
	struct gp8psk_fe_state* state = fe->demodulator_priv;

	if (gp8psk_usb_out_op(state->d,SET_22KHZ_TONE,
		 (tone == SEC_TONE_ON), 0, NULL, 0)) {
		return -EINVAL;
	}
	return 0;
}

static int gp8psk_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
	struct gp8psk_fe_state* state = fe->demodulator_priv;

	if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE,
			 voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {
		return -EINVAL;
	}
	return 0;
}

static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
{
	struct gp8psk_fe_state* state = fe->demodulator_priv;
	u8 cmd = sw_cmd & 0x7f;

	if (gp8psk_usb_out_op(state->d,SET_DN_SWITCH, cmd, 0,
			NULL, 0)) {
		return -EINVAL;
	}
	if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
			0, NULL, 0)) {
		return -EINVAL;
	}

	return 0;
}

static void gp8psk_fe_release(struct dvb_frontend* fe)
{
	struct gp8psk_fe_state *state = fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops gp8psk_fe_ops;

struct dvb_frontend * gp8psk_fe_attach(struct dvb_usb_device *d)
{
	struct gp8psk_fe_state *s = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
	if (s == NULL)
		goto error;

	s->d = d;
	memcpy(&s->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
	s->fe.demodulator_priv = s;

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


static struct dvb_frontend_ops gp8psk_fe_ops = {
	.info = {
		.name			= "Genpix 8psk-USB DVB-S",
		.type			= FE_QPSK,
		.frequency_min		= 950000,
		.frequency_max		= 2150000,
		.frequency_stepsize	= 100,
		.symbol_rate_min        = 1000000,
		.symbol_rate_max        = 45000000,
		.symbol_rate_tolerance  = 500,  /* ppm */
		.caps = FE_CAN_INVERSION_AUTO |
				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 = gp8psk_fe_release,

	.init = NULL,
	.sleep = NULL,

	.set_frontend = gp8psk_fe_set_frontend,
	.get_frontend = gp8psk_fe_get_frontend,
	.get_tune_settings = gp8psk_fe_get_tune_settings,

	.read_status = gp8psk_fe_read_status,
	.read_ber = gp8psk_fe_read_ber,
	.read_signal_strength = gp8psk_fe_read_signal_strength,
	.read_snr = gp8psk_fe_read_snr,
	.read_ucblocks = gp8psk_fe_read_unc_blocks,

	.diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg,
	.diseqc_send_burst = gp8psk_fe_send_diseqc_burst,
	.set_tone = gp8psk_fe_set_tone,
	.set_voltage = gp8psk_fe_set_voltage,
	.dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd,
};
OpenPOWER on IntegriCloud