1 /*
2 * TerraTec Cinergy T2/qanu USB2 DVB-T adapter.
3 *
4 * Copyright (C) 2007 Tomi Orava (tomimo@ncircle.nullnet.fi)
5 *
6 * Based on the dvb-usb-framework code and the
7 * original Terratec Cinergy T2 driver by:
8 *
9 * Copyright (C) 2004 Daniel Mack <daniel@qanu.de> and
10 * Holger Waechtler <holger@qanu.de>
11 *
12 * Protocol Spec published on http://qanu.de/specs/terratec_cinergyT2.pdf
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 */
29
30 #include "cinergyT2.h"
31
32
33 /**
34 * convert linux-dvb frontend parameter set into TPS.
35 * See ETSI ETS-300744, section 4.6.2, table 9 for details.
36 *
37 * This function is probably reusable and may better get placed in a support
38 * library.
39 *
40 * We replace errornous fields by default TPS fields (the ones with value 0).
41 */
42
compute_tps(struct dtv_frontend_properties * op)43 static uint16_t compute_tps(struct dtv_frontend_properties *op)
44 {
45 uint16_t tps = 0;
46
47 switch (op->code_rate_HP) {
48 case FEC_2_3:
49 tps |= (1 << 7);
50 break;
51 case FEC_3_4:
52 tps |= (2 << 7);
53 break;
54 case FEC_5_6:
55 tps |= (3 << 7);
56 break;
57 case FEC_7_8:
58 tps |= (4 << 7);
59 break;
60 case FEC_1_2:
61 case FEC_AUTO:
62 default:
63 /* tps |= (0 << 7) */;
64 }
65
66 switch (op->code_rate_LP) {
67 case FEC_2_3:
68 tps |= (1 << 4);
69 break;
70 case FEC_3_4:
71 tps |= (2 << 4);
72 break;
73 case FEC_5_6:
74 tps |= (3 << 4);
75 break;
76 case FEC_7_8:
77 tps |= (4 << 4);
78 break;
79 case FEC_1_2:
80 case FEC_AUTO:
81 default:
82 /* tps |= (0 << 4) */;
83 }
84
85 switch (op->modulation) {
86 case QAM_16:
87 tps |= (1 << 13);
88 break;
89 case QAM_64:
90 tps |= (2 << 13);
91 break;
92 case QPSK:
93 default:
94 /* tps |= (0 << 13) */;
95 }
96
97 switch (op->transmission_mode) {
98 case TRANSMISSION_MODE_8K:
99 tps |= (1 << 0);
100 break;
101 case TRANSMISSION_MODE_2K:
102 default:
103 /* tps |= (0 << 0) */;
104 }
105
106 switch (op->guard_interval) {
107 case GUARD_INTERVAL_1_16:
108 tps |= (1 << 2);
109 break;
110 case GUARD_INTERVAL_1_8:
111 tps |= (2 << 2);
112 break;
113 case GUARD_INTERVAL_1_4:
114 tps |= (3 << 2);
115 break;
116 case GUARD_INTERVAL_1_32:
117 default:
118 /* tps |= (0 << 2) */;
119 }
120
121 switch (op->hierarchy) {
122 case HIERARCHY_1:
123 tps |= (1 << 10);
124 break;
125 case HIERARCHY_2:
126 tps |= (2 << 10);
127 break;
128 case HIERARCHY_4:
129 tps |= (3 << 10);
130 break;
131 case HIERARCHY_NONE:
132 default:
133 /* tps |= (0 << 10) */;
134 }
135
136 return tps;
137 }
138
139 struct cinergyt2_fe_state {
140 struct dvb_frontend fe;
141 struct dvb_usb_device *d;
142 };
143
cinergyt2_fe_read_status(struct dvb_frontend * fe,fe_status_t * status)144 static int cinergyt2_fe_read_status(struct dvb_frontend *fe,
145 fe_status_t *status)
146 {
147 struct cinergyt2_fe_state *state = fe->demodulator_priv;
148 struct dvbt_get_status_msg result;
149 u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
150 int ret;
151
152 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&result,
153 sizeof(result), 0);
154 if (ret < 0)
155 return ret;
156
157 *status = 0;
158
159 if (0xffff - le16_to_cpu(result.gain) > 30)
160 *status |= FE_HAS_SIGNAL;
161 if (result.lock_bits & (1 << 6))
162 *status |= FE_HAS_LOCK;
163 if (result.lock_bits & (1 << 5))
164 *status |= FE_HAS_SYNC;
165 if (result.lock_bits & (1 << 4))
166 *status |= FE_HAS_CARRIER;
167 if (result.lock_bits & (1 << 1))
168 *status |= FE_HAS_VITERBI;
169
170 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
171 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
172 *status &= ~FE_HAS_LOCK;
173
174 return 0;
175 }
176
cinergyt2_fe_read_ber(struct dvb_frontend * fe,u32 * ber)177 static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
178 {
179 struct cinergyt2_fe_state *state = fe->demodulator_priv;
180 struct dvbt_get_status_msg status;
181 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
182 int ret;
183
184 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
185 sizeof(status), 0);
186 if (ret < 0)
187 return ret;
188
189 *ber = le32_to_cpu(status.viterbi_error_rate);
190 return 0;
191 }
192
cinergyt2_fe_read_unc_blocks(struct dvb_frontend * fe,u32 * unc)193 static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
194 {
195 struct cinergyt2_fe_state *state = fe->demodulator_priv;
196 struct dvbt_get_status_msg status;
197 u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
198 int ret;
199
200 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&status,
201 sizeof(status), 0);
202 if (ret < 0) {
203 err("cinergyt2_fe_read_unc_blocks() Failed! (Error=%d)\n",
204 ret);
205 return ret;
206 }
207 *unc = le32_to_cpu(status.uncorrected_block_count);
208 return 0;
209 }
210
cinergyt2_fe_read_signal_strength(struct dvb_frontend * fe,u16 * strength)211 static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe,
212 u16 *strength)
213 {
214 struct cinergyt2_fe_state *state = fe->demodulator_priv;
215 struct dvbt_get_status_msg status;
216 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
217 int ret;
218
219 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
220 sizeof(status), 0);
221 if (ret < 0) {
222 err("cinergyt2_fe_read_signal_strength() Failed!"
223 " (Error=%d)\n", ret);
224 return ret;
225 }
226 *strength = (0xffff - le16_to_cpu(status.gain));
227 return 0;
228 }
229
cinergyt2_fe_read_snr(struct dvb_frontend * fe,u16 * snr)230 static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
231 {
232 struct cinergyt2_fe_state *state = fe->demodulator_priv;
233 struct dvbt_get_status_msg status;
234 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
235 int ret;
236
237 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
238 sizeof(status), 0);
239 if (ret < 0) {
240 err("cinergyt2_fe_read_snr() Failed! (Error=%d)\n", ret);
241 return ret;
242 }
243 *snr = (status.snr << 8) | status.snr;
244 return 0;
245 }
246
cinergyt2_fe_init(struct dvb_frontend * fe)247 static int cinergyt2_fe_init(struct dvb_frontend *fe)
248 {
249 return 0;
250 }
251
cinergyt2_fe_sleep(struct dvb_frontend * fe)252 static int cinergyt2_fe_sleep(struct dvb_frontend *fe)
253 {
254 deb_info("cinergyt2_fe_sleep() Called\n");
255 return 0;
256 }
257
cinergyt2_fe_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * tune)258 static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe,
259 struct dvb_frontend_tune_settings *tune)
260 {
261 tune->min_delay_ms = 800;
262 return 0;
263 }
264
cinergyt2_fe_set_frontend(struct dvb_frontend * fe)265 static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe)
266 {
267 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
268 struct cinergyt2_fe_state *state = fe->demodulator_priv;
269 struct dvbt_set_parameters_msg param;
270 char result[2];
271 int err;
272
273 param.cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
274 param.tps = cpu_to_le16(compute_tps(fep));
275 param.freq = cpu_to_le32(fep->frequency / 1000);
276 param.flags = 0;
277
278 switch (fep->bandwidth_hz) {
279 default:
280 case 8000000:
281 param.bandwidth = 8;
282 break;
283 case 7000000:
284 param.bandwidth = 7;
285 break;
286 case 6000000:
287 param.bandwidth = 6;
288 break;
289 }
290
291 err = dvb_usb_generic_rw(state->d,
292 (char *)¶m, sizeof(param),
293 result, sizeof(result), 0);
294 if (err < 0)
295 err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err);
296
297 return (err < 0) ? err : 0;
298 }
299
cinergyt2_fe_release(struct dvb_frontend * fe)300 static void cinergyt2_fe_release(struct dvb_frontend *fe)
301 {
302 struct cinergyt2_fe_state *state = fe->demodulator_priv;
303 if (state != NULL)
304 kfree(state);
305 }
306
307 static struct dvb_frontend_ops cinergyt2_fe_ops;
308
cinergyt2_fe_attach(struct dvb_usb_device * d)309 struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d)
310 {
311 struct cinergyt2_fe_state *s = kzalloc(sizeof(
312 struct cinergyt2_fe_state), GFP_KERNEL);
313 if (s == NULL)
314 return NULL;
315
316 s->d = d;
317 memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops));
318 s->fe.demodulator_priv = s;
319 return &s->fe;
320 }
321
322
323 static struct dvb_frontend_ops cinergyt2_fe_ops = {
324 .delsys = { SYS_DVBT },
325 .info = {
326 .name = DRIVER_NAME,
327 .frequency_min = 174000000,
328 .frequency_max = 862000000,
329 .frequency_stepsize = 166667,
330 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2
331 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4
332 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8
333 | FE_CAN_FEC_AUTO | FE_CAN_QPSK
334 | FE_CAN_QAM_16 | FE_CAN_QAM_64
335 | FE_CAN_QAM_AUTO
336 | FE_CAN_TRANSMISSION_MODE_AUTO
337 | FE_CAN_GUARD_INTERVAL_AUTO
338 | FE_CAN_HIERARCHY_AUTO
339 | FE_CAN_RECOVER
340 | FE_CAN_MUTE_TS
341 },
342
343 .release = cinergyt2_fe_release,
344
345 .init = cinergyt2_fe_init,
346 .sleep = cinergyt2_fe_sleep,
347
348 .set_frontend = cinergyt2_fe_set_frontend,
349 .get_tune_settings = cinergyt2_fe_get_tune_settings,
350
351 .read_status = cinergyt2_fe_read_status,
352 .read_ber = cinergyt2_fe_read_ber,
353 .read_signal_strength = cinergyt2_fe_read_signal_strength,
354 .read_snr = cinergyt2_fe_read_snr,
355 .read_ucblocks = cinergyt2_fe_read_unc_blocks,
356 };
357