1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* DVB frontend part of the Linux driver for TwinhanDTV Alpha/MagicBoxII USB2.0 |
3 | * DVB-T receiver. |
4 | * |
5 | * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de) |
6 | * |
7 | * Thanks to Twinhan who kindly provided hardware and information. |
8 | * |
9 | * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information |
10 | */ |
11 | #include "vp7045.h" |
12 | |
13 | /* It is a Zarlink MT352 within a Samsung Tuner (DNOS404ZH102A) - 040929 - AAT |
14 | * |
15 | * Programming is hidden inside the firmware, so set_frontend is very easy. |
16 | * Even though there is a Firmware command that one can use to access the demod |
17 | * via its registers. This is used for status information. |
18 | */ |
19 | |
20 | struct vp7045_fe_state { |
21 | struct dvb_frontend fe; |
22 | struct dvb_usb_device *d; |
23 | }; |
24 | |
25 | static int vp7045_fe_read_status(struct dvb_frontend *fe, |
26 | enum fe_status *status) |
27 | { |
28 | struct vp7045_fe_state *state = fe->demodulator_priv; |
29 | u8 s0 = vp7045_read_reg(d: state->d,reg: 0x00), |
30 | s1 = vp7045_read_reg(d: state->d,reg: 0x01), |
31 | s3 = vp7045_read_reg(d: state->d,reg: 0x03); |
32 | |
33 | *status = 0; |
34 | if (s0 & (1 << 4)) |
35 | *status |= FE_HAS_CARRIER; |
36 | if (s0 & (1 << 1)) |
37 | *status |= FE_HAS_VITERBI; |
38 | if (s0 & (1 << 5)) |
39 | *status |= FE_HAS_LOCK; |
40 | if (s1 & (1 << 1)) |
41 | *status |= FE_HAS_SYNC; |
42 | if (s3 & (1 << 6)) |
43 | *status |= FE_HAS_SIGNAL; |
44 | |
45 | if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != |
46 | (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) |
47 | *status &= ~FE_HAS_LOCK; |
48 | |
49 | return 0; |
50 | } |
51 | |
52 | static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber) |
53 | { |
54 | struct vp7045_fe_state *state = fe->demodulator_priv; |
55 | *ber = (vp7045_read_reg(d: state->d, reg: 0x0D) << 16) | |
56 | (vp7045_read_reg(d: state->d, reg: 0x0E) << 8) | |
57 | vp7045_read_reg(d: state->d, reg: 0x0F); |
58 | return 0; |
59 | } |
60 | |
61 | static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) |
62 | { |
63 | struct vp7045_fe_state *state = fe->demodulator_priv; |
64 | *unc = (vp7045_read_reg(d: state->d, reg: 0x10) << 8) | |
65 | vp7045_read_reg(d: state->d, reg: 0x11); |
66 | return 0; |
67 | } |
68 | |
69 | static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) |
70 | { |
71 | struct vp7045_fe_state *state = fe->demodulator_priv; |
72 | u16 signal = (vp7045_read_reg(d: state->d, reg: 0x14) << 8) | |
73 | vp7045_read_reg(d: state->d, reg: 0x15); |
74 | |
75 | *strength = ~signal; |
76 | return 0; |
77 | } |
78 | |
79 | static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr) |
80 | { |
81 | struct vp7045_fe_state *state = fe->demodulator_priv; |
82 | u8 _snr = vp7045_read_reg(d: state->d, reg: 0x09); |
83 | *snr = (_snr << 8) | _snr; |
84 | return 0; |
85 | } |
86 | |
87 | static int vp7045_fe_init(struct dvb_frontend* fe) |
88 | { |
89 | return 0; |
90 | } |
91 | |
92 | static int vp7045_fe_sleep(struct dvb_frontend* fe) |
93 | { |
94 | return 0; |
95 | } |
96 | |
97 | static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) |
98 | { |
99 | tune->min_delay_ms = 800; |
100 | return 0; |
101 | } |
102 | |
103 | static int vp7045_fe_set_frontend(struct dvb_frontend *fe) |
104 | { |
105 | struct dtv_frontend_properties *fep = &fe->dtv_property_cache; |
106 | struct vp7045_fe_state *state = fe->demodulator_priv; |
107 | u8 buf[5]; |
108 | u32 freq = fep->frequency / 1000; |
109 | |
110 | buf[0] = (freq >> 16) & 0xff; |
111 | buf[1] = (freq >> 8) & 0xff; |
112 | buf[2] = freq & 0xff; |
113 | buf[3] = 0; |
114 | |
115 | switch (fep->bandwidth_hz) { |
116 | case 8000000: |
117 | buf[4] = 8; |
118 | break; |
119 | case 7000000: |
120 | buf[4] = 7; |
121 | break; |
122 | case 6000000: |
123 | buf[4] = 6; |
124 | break; |
125 | default: |
126 | return -EINVAL; |
127 | } |
128 | |
129 | vp7045_usb_op(d: state->d,LOCK_TUNER_COMMAND,out: buf,outlen: 5,NULL,inlen: 0,msec: 200); |
130 | return 0; |
131 | } |
132 | |
133 | static void vp7045_fe_release(struct dvb_frontend* fe) |
134 | { |
135 | struct vp7045_fe_state *state = fe->demodulator_priv; |
136 | kfree(objp: state); |
137 | } |
138 | |
139 | static const struct dvb_frontend_ops vp7045_fe_ops; |
140 | |
141 | struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d) |
142 | { |
143 | struct vp7045_fe_state *s = kzalloc(size: sizeof(struct vp7045_fe_state), GFP_KERNEL); |
144 | if (s == NULL) |
145 | goto error; |
146 | |
147 | s->d = d; |
148 | memcpy(&s->fe.ops, &vp7045_fe_ops, sizeof(struct dvb_frontend_ops)); |
149 | s->fe.demodulator_priv = s; |
150 | |
151 | return &s->fe; |
152 | error: |
153 | return NULL; |
154 | } |
155 | |
156 | |
157 | static const struct dvb_frontend_ops vp7045_fe_ops = { |
158 | .delsys = { SYS_DVBT }, |
159 | .info = { |
160 | .name = "Twinhan VP7045/46 USB DVB-T" , |
161 | .frequency_min_hz = 44250 * kHz, |
162 | .frequency_max_hz = 867250 * kHz, |
163 | .frequency_stepsize_hz = 1 * kHz, |
164 | .caps = FE_CAN_INVERSION_AUTO | |
165 | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | |
166 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | |
167 | FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | |
168 | FE_CAN_TRANSMISSION_MODE_AUTO | |
169 | FE_CAN_GUARD_INTERVAL_AUTO | |
170 | FE_CAN_RECOVER | |
171 | FE_CAN_HIERARCHY_AUTO, |
172 | }, |
173 | |
174 | .release = vp7045_fe_release, |
175 | |
176 | .init = vp7045_fe_init, |
177 | .sleep = vp7045_fe_sleep, |
178 | |
179 | .set_frontend = vp7045_fe_set_frontend, |
180 | .get_tune_settings = vp7045_fe_get_tune_settings, |
181 | |
182 | .read_status = vp7045_fe_read_status, |
183 | .read_ber = vp7045_fe_read_ber, |
184 | .read_signal_strength = vp7045_fe_read_signal_strength, |
185 | .read_snr = vp7045_fe_read_snr, |
186 | .read_ucblocks = vp7045_fe_read_unc_blocks, |
187 | }; |
188 | |