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776338e1 JS |
1 | /* DVB frontend part of the Linux driver for TwinhanDTV Alpha/MagicBoxII USB2.0 |
2 | * DVB-T receiver. | |
3 | * | |
4 | * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de) | |
5 | * | |
6 | * Thanks to Twinhan who kindly provided hardware and information. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the Free | |
10 | * Software Foundation, version 2. | |
11 | * | |
12 | * see Documentation/dvb/README.dvb-usb for more information | |
13 | * | |
14 | */ | |
15 | #include "vp7045.h" | |
16 | ||
17 | /* It is a Zarlink MT352 within a Samsung Tuner (DNOS404ZH102A) - 040929 - AAT | |
18 | * | |
19 | * Programming is hidden inside the firmware, so set_frontend is very easy. | |
20 | * Even though there is a Firmware command that one can use to access the demod | |
21 | * via its registers. This is used for status information. | |
22 | */ | |
23 | ||
24 | struct vp7045_fe_state { | |
25 | struct dvb_frontend fe; | |
26 | struct dvb_usb_device *d; | |
27 | }; | |
28 | ||
776338e1 JS |
29 | static int vp7045_fe_read_status(struct dvb_frontend* fe, fe_status_t *status) |
30 | { | |
31 | struct vp7045_fe_state *state = fe->demodulator_priv; | |
32 | u8 s0 = vp7045_read_reg(state->d,0x00), | |
33 | s1 = vp7045_read_reg(state->d,0x01), | |
34 | s3 = vp7045_read_reg(state->d,0x03); | |
35 | ||
36 | *status = 0; | |
37 | if (s0 & (1 << 4)) | |
38 | *status |= FE_HAS_CARRIER; | |
39 | if (s0 & (1 << 1)) | |
40 | *status |= FE_HAS_VITERBI; | |
41 | if (s0 & (1 << 5)) | |
42 | *status |= FE_HAS_LOCK; | |
43 | if (s1 & (1 << 1)) | |
44 | *status |= FE_HAS_SYNC; | |
45 | if (s3 & (1 << 6)) | |
46 | *status |= FE_HAS_SIGNAL; | |
47 | ||
48 | if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != | |
49 | (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) | |
50 | *status &= ~FE_HAS_LOCK; | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
55 | static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber) | |
56 | { | |
57 | struct vp7045_fe_state *state = fe->demodulator_priv; | |
58 | *ber = (vp7045_read_reg(state->d, 0x0D) << 16) | | |
59 | (vp7045_read_reg(state->d, 0x0E) << 8) | | |
9101e622 | 60 | vp7045_read_reg(state->d, 0x0F); |
776338e1 JS |
61 | return 0; |
62 | } | |
63 | ||
64 | static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) | |
65 | { | |
66 | struct vp7045_fe_state *state = fe->demodulator_priv; | |
67 | *unc = (vp7045_read_reg(state->d, 0x10) << 8) | | |
68 | vp7045_read_reg(state->d, 0x11); | |
69 | return 0; | |
70 | } | |
71 | ||
72 | static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) | |
73 | { | |
74 | struct vp7045_fe_state *state = fe->demodulator_priv; | |
75 | u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) | | |
76 | vp7045_read_reg(state->d, 0x15); | |
77 | ||
78 | *strength = ~signal; | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr) | |
83 | { | |
84 | struct vp7045_fe_state *state = fe->demodulator_priv; | |
85 | u8 _snr = vp7045_read_reg(state->d, 0x09); | |
86 | *snr = (_snr << 8) | _snr; | |
87 | return 0; | |
88 | } | |
89 | ||
90 | static int vp7045_fe_init(struct dvb_frontend* fe) | |
91 | { | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static int vp7045_fe_sleep(struct dvb_frontend* fe) | |
96 | { | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) | |
101 | { | |
102 | tune->min_delay_ms = 800; | |
103 | return 0; | |
104 | } | |
105 | ||
106 | static int vp7045_fe_set_frontend(struct dvb_frontend* fe, | |
107 | struct dvb_frontend_parameters *fep) | |
108 | { | |
109 | struct vp7045_fe_state *state = fe->demodulator_priv; | |
110 | u8 buf[5]; | |
111 | u32 freq = fep->frequency / 1000; | |
112 | ||
113 | buf[0] = (freq >> 16) & 0xff; | |
114 | buf[1] = (freq >> 8) & 0xff; | |
115 | buf[2] = freq & 0xff; | |
116 | buf[3] = 0; | |
117 | ||
118 | switch (fep->u.ofdm.bandwidth) { | |
119 | case BANDWIDTH_8_MHZ: buf[4] = 8; break; | |
120 | case BANDWIDTH_7_MHZ: buf[4] = 7; break; | |
121 | case BANDWIDTH_6_MHZ: buf[4] = 6; break; | |
122 | case BANDWIDTH_AUTO: return -EOPNOTSUPP; | |
123 | default: | |
124 | return -EINVAL; | |
125 | } | |
126 | ||
127 | vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200); | |
128 | return 0; | |
129 | } | |
130 | ||
131 | static int vp7045_fe_get_frontend(struct dvb_frontend* fe, | |
132 | struct dvb_frontend_parameters *fep) | |
133 | { | |
134 | return 0; | |
135 | } | |
136 | ||
137 | static void vp7045_fe_release(struct dvb_frontend* fe) | |
138 | { | |
139 | struct vp7045_fe_state *state = fe->demodulator_priv; | |
140 | kfree(state); | |
141 | } | |
142 | ||
143 | static struct dvb_frontend_ops vp7045_fe_ops; | |
144 | ||
145 | struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d) | |
146 | { | |
7408187d | 147 | struct vp7045_fe_state *s = kzalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL); |
776338e1 JS |
148 | if (s == NULL) |
149 | goto error; | |
776338e1 JS |
150 | |
151 | s->d = d; | |
dea74869 | 152 | memcpy(&s->fe.ops, &vp7045_fe_ops, sizeof(struct dvb_frontend_ops)); |
776338e1 JS |
153 | s->fe.demodulator_priv = s; |
154 | ||
8397703e | 155 | return &s->fe; |
776338e1 JS |
156 | error: |
157 | return NULL; | |
776338e1 JS |
158 | } |
159 | ||
160 | ||
161 | static struct dvb_frontend_ops vp7045_fe_ops = { | |
162 | .info = { | |
163 | .name = "Twinhan VP7045/46 USB DVB-T", | |
164 | .type = FE_OFDM, | |
165 | .frequency_min = 44250000, | |
166 | .frequency_max = 867250000, | |
167 | .frequency_stepsize = 1000, | |
168 | .caps = FE_CAN_INVERSION_AUTO | | |
169 | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | | |
170 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | | |
171 | FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | | |
172 | FE_CAN_TRANSMISSION_MODE_AUTO | | |
173 | FE_CAN_GUARD_INTERVAL_AUTO | | |
174 | FE_CAN_RECOVER | | |
175 | FE_CAN_HIERARCHY_AUTO, | |
176 | }, | |
177 | ||
178 | .release = vp7045_fe_release, | |
179 | ||
180 | .init = vp7045_fe_init, | |
181 | .sleep = vp7045_fe_sleep, | |
182 | ||
183 | .set_frontend = vp7045_fe_set_frontend, | |
184 | .get_frontend = vp7045_fe_get_frontend, | |
185 | .get_tune_settings = vp7045_fe_get_tune_settings, | |
186 | ||
187 | .read_status = vp7045_fe_read_status, | |
188 | .read_ber = vp7045_fe_read_ber, | |
189 | .read_signal_strength = vp7045_fe_read_signal_strength, | |
190 | .read_snr = vp7045_fe_read_snr, | |
191 | .read_ucblocks = vp7045_fe_read_unc_blocks, | |
192 | }; |