1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * TerraTec Cinergy T2/qanu USB2 DVB-T adapter.
4 *
5 * Copyright (C) 2007 Tomi Orava (tomimo@ncircle.nullnet.fi)
6 *
7 * Based on the dvb-usb-framework code and the
8 * original Terratec Cinergy T2 driver by:
9 *
10 * Copyright (C) 2004 Daniel Mack <daniel@qanu.de> and
11 * Holger Waechtler <holger@qanu.de>
12 *
13 * Protocol Spec published on http://qanu.de/specs/terratec_cinergyT2.pdf
14 */
15
16 #include "cinergyT2.h"
17
18
19 /*
20 * convert linux-dvb frontend parameter set into TPS.
21 * See ETSI ETS-300744, section 4.6.2, table 9 for details.
22 *
23 * This function is probably reusable and may better get placed in a support
24 * library.
25 *
26 * We replace erroneous fields by default TPS fields (the ones with value 0).
27 */
28
compute_tps(struct dtv_frontend_properties * op)29 static uint16_t compute_tps(struct dtv_frontend_properties *op)
30 {
31 uint16_t tps = 0;
32
33 switch (op->code_rate_HP) {
34 case FEC_2_3:
35 tps |= (1 << 7);
36 break;
37 case FEC_3_4:
38 tps |= (2 << 7);
39 break;
40 case FEC_5_6:
41 tps |= (3 << 7);
42 break;
43 case FEC_7_8:
44 tps |= (4 << 7);
45 break;
46 case FEC_1_2:
47 case FEC_AUTO:
48 default:
49 /* tps |= (0 << 7) */;
50 }
51
52 switch (op->code_rate_LP) {
53 case FEC_2_3:
54 tps |= (1 << 4);
55 break;
56 case FEC_3_4:
57 tps |= (2 << 4);
58 break;
59 case FEC_5_6:
60 tps |= (3 << 4);
61 break;
62 case FEC_7_8:
63 tps |= (4 << 4);
64 break;
65 case FEC_1_2:
66 case FEC_AUTO:
67 default:
68 /* tps |= (0 << 4) */;
69 }
70
71 switch (op->modulation) {
72 case QAM_16:
73 tps |= (1 << 13);
74 break;
75 case QAM_64:
76 tps |= (2 << 13);
77 break;
78 case QPSK:
79 default:
80 /* tps |= (0 << 13) */;
81 }
82
83 switch (op->transmission_mode) {
84 case TRANSMISSION_MODE_8K:
85 tps |= (1 << 0);
86 break;
87 case TRANSMISSION_MODE_2K:
88 default:
89 /* tps |= (0 << 0) */;
90 }
91
92 switch (op->guard_interval) {
93 case GUARD_INTERVAL_1_16:
94 tps |= (1 << 2);
95 break;
96 case GUARD_INTERVAL_1_8:
97 tps |= (2 << 2);
98 break;
99 case GUARD_INTERVAL_1_4:
100 tps |= (3 << 2);
101 break;
102 case GUARD_INTERVAL_1_32:
103 default:
104 /* tps |= (0 << 2) */;
105 }
106
107 switch (op->hierarchy) {
108 case HIERARCHY_1:
109 tps |= (1 << 10);
110 break;
111 case HIERARCHY_2:
112 tps |= (2 << 10);
113 break;
114 case HIERARCHY_4:
115 tps |= (3 << 10);
116 break;
117 case HIERARCHY_NONE:
118 default:
119 /* tps |= (0 << 10) */;
120 }
121
122 return tps;
123 }
124
125 struct cinergyt2_fe_state {
126 struct dvb_frontend fe;
127 struct dvb_usb_device *d;
128
129 unsigned char data[64];
130 struct mutex data_mutex;
131
132 struct dvbt_get_status_msg status;
133 };
134
cinergyt2_fe_read_status(struct dvb_frontend * fe,enum fe_status * status)135 static int cinergyt2_fe_read_status(struct dvb_frontend *fe,
136 enum fe_status *status)
137 {
138 struct cinergyt2_fe_state *state = fe->demodulator_priv;
139 int ret;
140
141 mutex_lock(&state->data_mutex);
142 state->data[0] = CINERGYT2_EP1_GET_TUNER_STATUS;
143
144 ret = dvb_usb_generic_rw(state->d, state->data, 1,
145 state->data, sizeof(state->status), 0);
146 if (!ret)
147 memcpy(&state->status, state->data, sizeof(state->status));
148 mutex_unlock(&state->data_mutex);
149
150 if (ret < 0)
151 return ret;
152
153 *status = 0;
154
155 if (0xffff - le16_to_cpu(state->status.gain) > 30)
156 *status |= FE_HAS_SIGNAL;
157 if (state->status.lock_bits & (1 << 6))
158 *status |= FE_HAS_LOCK;
159 if (state->status.lock_bits & (1 << 5))
160 *status |= FE_HAS_SYNC;
161 if (state->status.lock_bits & (1 << 4))
162 *status |= FE_HAS_CARRIER;
163 if (state->status.lock_bits & (1 << 1))
164 *status |= FE_HAS_VITERBI;
165
166 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
167 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
168 *status &= ~FE_HAS_LOCK;
169
170 return 0;
171 }
172
cinergyt2_fe_read_ber(struct dvb_frontend * fe,u32 * ber)173 static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
174 {
175 struct cinergyt2_fe_state *state = fe->demodulator_priv;
176
177 *ber = le32_to_cpu(state->status.viterbi_error_rate);
178 return 0;
179 }
180
cinergyt2_fe_read_unc_blocks(struct dvb_frontend * fe,u32 * unc)181 static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
182 {
183 struct cinergyt2_fe_state *state = fe->demodulator_priv;
184
185 *unc = le32_to_cpu(state->status.uncorrected_block_count);
186 return 0;
187 }
188
cinergyt2_fe_read_signal_strength(struct dvb_frontend * fe,u16 * strength)189 static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe,
190 u16 *strength)
191 {
192 struct cinergyt2_fe_state *state = fe->demodulator_priv;
193
194 *strength = (0xffff - le16_to_cpu(state->status.gain));
195 return 0;
196 }
197
cinergyt2_fe_read_snr(struct dvb_frontend * fe,u16 * snr)198 static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
199 {
200 struct cinergyt2_fe_state *state = fe->demodulator_priv;
201
202 *snr = (state->status.snr << 8) | state->status.snr;
203 return 0;
204 }
205
cinergyt2_fe_init(struct dvb_frontend * fe)206 static int cinergyt2_fe_init(struct dvb_frontend *fe)
207 {
208 return 0;
209 }
210
cinergyt2_fe_sleep(struct dvb_frontend * fe)211 static int cinergyt2_fe_sleep(struct dvb_frontend *fe)
212 {
213 deb_info("cinergyt2_fe_sleep() Called\n");
214 return 0;
215 }
216
cinergyt2_fe_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * tune)217 static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe,
218 struct dvb_frontend_tune_settings *tune)
219 {
220 tune->min_delay_ms = 800;
221 return 0;
222 }
223
cinergyt2_fe_set_frontend(struct dvb_frontend * fe)224 static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe)
225 {
226 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
227 struct cinergyt2_fe_state *state = fe->demodulator_priv;
228 struct dvbt_set_parameters_msg *param;
229 int err;
230
231 mutex_lock(&state->data_mutex);
232
233 param = (void *)state->data;
234 param->cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
235 param->tps = cpu_to_le16(compute_tps(fep));
236 param->freq = cpu_to_le32(fep->frequency / 1000);
237 param->flags = 0;
238
239 switch (fep->bandwidth_hz) {
240 default:
241 case 8000000:
242 param->bandwidth = 8;
243 break;
244 case 7000000:
245 param->bandwidth = 7;
246 break;
247 case 6000000:
248 param->bandwidth = 6;
249 break;
250 }
251
252 err = dvb_usb_generic_rw(state->d, state->data, sizeof(*param),
253 state->data, 2, 0);
254 if (err < 0)
255 err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err);
256
257 mutex_unlock(&state->data_mutex);
258 return (err < 0) ? err : 0;
259 }
260
cinergyt2_fe_release(struct dvb_frontend * fe)261 static void cinergyt2_fe_release(struct dvb_frontend *fe)
262 {
263 struct cinergyt2_fe_state *state = fe->demodulator_priv;
264 kfree(state);
265 }
266
267 static const struct dvb_frontend_ops cinergyt2_fe_ops;
268
cinergyt2_fe_attach(struct dvb_usb_device * d)269 struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d)
270 {
271 struct cinergyt2_fe_state *s = kzalloc(sizeof(
272 struct cinergyt2_fe_state), GFP_KERNEL);
273 if (s == NULL)
274 return NULL;
275
276 s->d = d;
277 memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops));
278 s->fe.demodulator_priv = s;
279 mutex_init(&s->data_mutex);
280 return &s->fe;
281 }
282
283
284 static const struct dvb_frontend_ops cinergyt2_fe_ops = {
285 .delsys = { SYS_DVBT },
286 .info = {
287 .name = DRIVER_NAME,
288 .frequency_min_hz = 174 * MHz,
289 .frequency_max_hz = 862 * MHz,
290 .frequency_stepsize_hz = 166667,
291 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2
292 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4
293 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8
294 | FE_CAN_FEC_AUTO | FE_CAN_QPSK
295 | FE_CAN_QAM_16 | FE_CAN_QAM_64
296 | FE_CAN_QAM_AUTO
297 | FE_CAN_TRANSMISSION_MODE_AUTO
298 | FE_CAN_GUARD_INTERVAL_AUTO
299 | FE_CAN_HIERARCHY_AUTO
300 | FE_CAN_RECOVER
301 | FE_CAN_MUTE_TS
302 },
303
304 .release = cinergyt2_fe_release,
305
306 .init = cinergyt2_fe_init,
307 .sleep = cinergyt2_fe_sleep,
308
309 .set_frontend = cinergyt2_fe_set_frontend,
310 .get_tune_settings = cinergyt2_fe_get_tune_settings,
311
312 .read_status = cinergyt2_fe_read_status,
313 .read_ber = cinergyt2_fe_read_ber,
314 .read_signal_strength = cinergyt2_fe_read_signal_strength,
315 .read_snr = cinergyt2_fe_read_snr,
316 .read_ucblocks = cinergyt2_fe_read_unc_blocks,
317 };
318
