summaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb/dvb-usb/vp7045-fe.c
blob: 83f1de1e7e571daaede818ace9b90c50fbab484a (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
/* DVB frontend part of the Linux driver for TwinhanDTV Alpha/MagicBoxII USB2.0
 * DVB-T receiver.
 *
 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
 *
 * Thanks to Twinhan who kindly provided hardware and information.
 *
 *	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 "vp7045.h"

/* It is a Zarlink MT352 within a Samsung Tuner (DNOS404ZH102A) - 040929 - AAT
 *
 * Programming is hidden inside the firmware, so set_frontend is very easy.
 * Even though there is a Firmware command that one can use to access the demod
 * via its registers. This is used for status information.
 */

struct vp7045_fe_state {
	struct dvb_frontend fe;
	struct dvb_usb_device *d;
};


static int vp7045_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
{
	struct vp7045_fe_state *state = fe->demodulator_priv;
	u8 s0 = vp7045_read_reg(state->d,0x00),
	   s1 = vp7045_read_reg(state->d,0x01),
	   s3 = vp7045_read_reg(state->d,0x03);

	*status = 0;
	if (s0 & (1 << 4))
		*status |= FE_HAS_CARRIER;
	if (s0 & (1 << 1))
		*status |= FE_HAS_VITERBI;
	if (s0 & (1 << 5))
		*status |= FE_HAS_LOCK;
	if (s1 & (1 << 1))
		*status |= FE_HAS_SYNC;
	if (s3 & (1 << 6))
		*status |= FE_HAS_SIGNAL;

	if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
			(FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
		*status &= ~FE_HAS_LOCK;

	return 0;
}

static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
{
	struct vp7045_fe_state *state = fe->demodulator_priv;
	*ber = (vp7045_read_reg(state->d, 0x0D) << 16) |
	       (vp7045_read_reg(state->d, 0x0E) << 8) |
		vp7045_read_reg(state->d, 0x0F);
	return 0;
}

static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
{
	struct vp7045_fe_state *state = fe->demodulator_priv;
	*unc = (vp7045_read_reg(state->d, 0x10) << 8) |
		    vp7045_read_reg(state->d, 0x11);
	return 0;
}

static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
{
	struct vp7045_fe_state *state = fe->demodulator_priv;
	u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) |
		vp7045_read_reg(state->d, 0x15);

	*strength = ~signal;
	return 0;
}

static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
{
	struct vp7045_fe_state *state = fe->demodulator_priv;
	u8 _snr = vp7045_read_reg(state->d, 0x09);
	*snr = (_snr << 8) | _snr;
	return 0;
}

static int vp7045_fe_init(struct dvb_frontend* fe)
{
	return 0;
}

static int vp7045_fe_sleep(struct dvb_frontend* fe)
{
	return 0;
}

static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
	tune->min_delay_ms = 800;
	return 0;
}

static int vp7045_fe_set_frontend(struct dvb_frontend* fe,
				  struct dvb_frontend_parameters *fep)
{
	struct vp7045_fe_state *state = fe->demodulator_priv;
	u8 buf[5];
	u32 freq = fep->frequency / 1000;

	buf[0] = (freq >> 16) & 0xff;
	buf[1] = (freq >>  8) & 0xff;
	buf[2] =  freq        & 0xff;
	buf[3] = 0;

	switch (fep->u.ofdm.bandwidth) {
		case BANDWIDTH_8_MHZ: buf[4] = 8; break;
		case BANDWIDTH_7_MHZ: buf[4] = 7; break;
		case BANDWIDTH_6_MHZ: buf[4] = 6; break;
		case BANDWIDTH_AUTO: return -EOPNOTSUPP;
		default:
			return -EINVAL;
	}

	vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200);
	return 0;
}

static int vp7045_fe_get_frontend(struct dvb_frontend* fe,
				  struct dvb_frontend_parameters *fep)
{
	return 0;
}

static void vp7045_fe_release(struct dvb_frontend* fe)
{
	struct vp7045_fe_state *state = fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops vp7045_fe_ops;

struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d)
{
	struct vp7045_fe_state *s = kmalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL);
	if (s == NULL)
		goto error;
	memset(s,0,sizeof(struct vp7045_fe_state));

	s->d = d;
	s->fe.ops = &vp7045_fe_ops;
	s->fe.demodulator_priv = s;

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


static struct dvb_frontend_ops vp7045_fe_ops = {
	.info = {
		.name			= "Twinhan VP7045/46 USB DVB-T",
		.type			= FE_OFDM,
		.frequency_min		= 44250000,
		.frequency_max		= 867250000,
		.frequency_stepsize	= 1000,
		.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 | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
				FE_CAN_TRANSMISSION_MODE_AUTO |
				FE_CAN_GUARD_INTERVAL_AUTO |
				FE_CAN_RECOVER |
				FE_CAN_HIERARCHY_AUTO,
	},

	.release = vp7045_fe_release,

	.init = vp7045_fe_init,
	.sleep = vp7045_fe_sleep,

	.set_frontend = vp7045_fe_set_frontend,
	.get_frontend = vp7045_fe_get_frontend,
	.get_tune_settings = vp7045_fe_get_tune_settings,

	.read_status = vp7045_fe_read_status,
	.read_ber = vp7045_fe_read_ber,
	.read_signal_strength = vp7045_fe_read_signal_strength,
	.read_snr = vp7045_fe_read_snr,
	.read_ucblocks = vp7045_fe_read_unc_blocks,
};