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path: root/drivers/media/dvb/dvb-usb/vp7045-fe.c
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Diffstat (limited to 'drivers/media/dvb/dvb-usb/vp7045-fe.c')
-rw-r--r--drivers/media/dvb/dvb-usb/vp7045-fe.c196
1 files changed, 196 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-usb/vp7045-fe.c b/drivers/media/dvb/dvb-usb/vp7045-fe.c
new file mode 100644
index 000000000000..2746edfeccba
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/vp7045-fe.c
@@ -0,0 +1,196 @@
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
24struct vp7045_fe_state {
25 struct dvb_frontend fe;
26 struct dvb_usb_device *d;
27};
28
29
30static int vp7045_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
31{
32 struct vp7045_fe_state *state = fe->demodulator_priv;
33 u8 s0 = vp7045_read_reg(state->d,0x00),
34 s1 = vp7045_read_reg(state->d,0x01),
35 s3 = vp7045_read_reg(state->d,0x03);
36
37 *status = 0;
38 if (s0 & (1 << 4))
39 *status |= FE_HAS_CARRIER;
40 if (s0 & (1 << 1))
41 *status |= FE_HAS_VITERBI;
42 if (s0 & (1 << 5))
43 *status |= FE_HAS_LOCK;
44 if (s1 & (1 << 1))
45 *status |= FE_HAS_SYNC;
46 if (s3 & (1 << 6))
47 *status |= FE_HAS_SIGNAL;
48
49 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
50 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
51 *status &= ~FE_HAS_LOCK;
52
53 return 0;
54}
55
56static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
57{
58 struct vp7045_fe_state *state = fe->demodulator_priv;
59 *ber = (vp7045_read_reg(state->d, 0x0D) << 16) |
60 (vp7045_read_reg(state->d, 0x0E) << 8) |
61 vp7045_read_reg(state->d, 0x0F);
62 return 0;
63}
64
65static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
66{
67 struct vp7045_fe_state *state = fe->demodulator_priv;
68 *unc = (vp7045_read_reg(state->d, 0x10) << 8) |
69 vp7045_read_reg(state->d, 0x11);
70 return 0;
71}
72
73static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
74{
75 struct vp7045_fe_state *state = fe->demodulator_priv;
76 u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) |
77 vp7045_read_reg(state->d, 0x15);
78
79 *strength = ~signal;
80 return 0;
81}
82
83static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
84{
85 struct vp7045_fe_state *state = fe->demodulator_priv;
86 u8 _snr = vp7045_read_reg(state->d, 0x09);
87 *snr = (_snr << 8) | _snr;
88 return 0;
89}
90
91static int vp7045_fe_init(struct dvb_frontend* fe)
92{
93 return 0;
94}
95
96static int vp7045_fe_sleep(struct dvb_frontend* fe)
97{
98 return 0;
99}
100
101static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
102{
103 tune->min_delay_ms = 800;
104 return 0;
105}
106
107static int vp7045_fe_set_frontend(struct dvb_frontend* fe,
108 struct dvb_frontend_parameters *fep)
109{
110 struct vp7045_fe_state *state = fe->demodulator_priv;
111 u8 buf[5];
112 u32 freq = fep->frequency / 1000;
113
114 buf[0] = (freq >> 16) & 0xff;
115 buf[1] = (freq >> 8) & 0xff;
116 buf[2] = freq & 0xff;
117 buf[3] = 0;
118
119 switch (fep->u.ofdm.bandwidth) {
120 case BANDWIDTH_8_MHZ: buf[4] = 8; break;
121 case BANDWIDTH_7_MHZ: buf[4] = 7; break;
122 case BANDWIDTH_6_MHZ: buf[4] = 6; break;
123 case BANDWIDTH_AUTO: return -EOPNOTSUPP;
124 default:
125 return -EINVAL;
126 }
127
128 vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200);
129 return 0;
130}
131
132static int vp7045_fe_get_frontend(struct dvb_frontend* fe,
133 struct dvb_frontend_parameters *fep)
134{
135 return 0;
136}
137
138static void vp7045_fe_release(struct dvb_frontend* fe)
139{
140 struct vp7045_fe_state *state = fe->demodulator_priv;
141 kfree(state);
142}
143
144static struct dvb_frontend_ops vp7045_fe_ops;
145
146struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d)
147{
148 struct vp7045_fe_state *s = kmalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL);
149 if (s == NULL)
150 goto error;
151 memset(s,0,sizeof(struct vp7045_fe_state));
152
153 s->d = d;
154 s->fe.ops = &vp7045_fe_ops;
155 s->fe.demodulator_priv = s;
156
157 goto success;
158error:
159 return NULL;
160success:
161 return &s->fe;
162}
163
164
165static struct dvb_frontend_ops vp7045_fe_ops = {
166 .info = {
167 .name = "Twinhan VP7045/46 USB DVB-T",
168 .type = FE_OFDM,
169 .frequency_min = 44250000,
170 .frequency_max = 867250000,
171 .frequency_stepsize = 1000,
172 .caps = FE_CAN_INVERSION_AUTO |
173 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
174 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
175 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
176 FE_CAN_TRANSMISSION_MODE_AUTO |
177 FE_CAN_GUARD_INTERVAL_AUTO |
178 FE_CAN_RECOVER |
179 FE_CAN_HIERARCHY_AUTO,
180 },
181
182 .release = vp7045_fe_release,
183
184 .init = vp7045_fe_init,
185 .sleep = vp7045_fe_sleep,
186
187 .set_frontend = vp7045_fe_set_frontend,
188 .get_frontend = vp7045_fe_get_frontend,
189 .get_tune_settings = vp7045_fe_get_tune_settings,
190
191 .read_status = vp7045_fe_read_status,
192 .read_ber = vp7045_fe_read_ber,
193 .read_signal_strength = vp7045_fe_read_signal_strength,
194 .read_snr = vp7045_fe_read_snr,
195 .read_ucblocks = vp7045_fe_read_unc_blocks,
196};
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 18:18:36 -0500