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gerrit-public.fairphone.software / kernel / msm-4.9 / 3047a17639d499691c657772667f2c1e65edabfb / . / drivers / media / dvb / dvb-usb / cinergyT2-fe.c
blob: 649f25cca49e37feb5de89d5b1ac2881863a6f9f [file] [log] [blame]
Tomi Orava986bd1e2008-09-19 00:48:31 -0300[diff] [blame]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
43static uint16_t compute_tps(struct dvb_frontend_parameters *p)
44{
45 struct dvb_ofdm_parameters *op = &p->u.ofdm;
46 uint16_t tps = 0;
47
48 switch (op->code_rate_HP) {
49 case FEC_2_3:
50 tps |= (1 << 7);
51 break;
52 case FEC_3_4:
53 tps |= (2 << 7);
54 break;
55 case FEC_5_6:
56 tps |= (3 << 7);
57 break;
58 case FEC_7_8:
59 tps |= (4 << 7);
60 break;
61 case FEC_1_2:
62 case FEC_AUTO:
63 default:
64 /* tps |= (0 << 7) */;
65 }
66
67 switch (op->code_rate_LP) {
68 case FEC_2_3:
69 tps |= (1 << 4);
70 break;
71 case FEC_3_4:
72 tps |= (2 << 4);
73 break;
74 case FEC_5_6:
75 tps |= (3 << 4);
76 break;
77 case FEC_7_8:
78 tps |= (4 << 4);
79 break;
80 case FEC_1_2:
81 case FEC_AUTO:
82 default:
83 /* tps |= (0 << 4) */;
84 }
85
86 switch (op->constellation) {
87 case QAM_16:
88 tps |= (1 << 13);
89 break;
90 case QAM_64:
91 tps |= (2 << 13);
92 break;
93 case QPSK:
94 default:
95 /* tps |= (0 << 13) */;
96 }
97
98 switch (op->transmission_mode) {
99 case TRANSMISSION_MODE_8K:
100 tps |= (1 << 0);
101 break;
102 case TRANSMISSION_MODE_2K:
103 default:
104 /* tps |= (0 << 0) */;
105 }
106
107 switch (op->guard_interval) {
108 case GUARD_INTERVAL_1_16:
109 tps |= (1 << 2);
110 break;
111 case GUARD_INTERVAL_1_8:
112 tps |= (2 << 2);
113 break;
114 case GUARD_INTERVAL_1_4:
115 tps |= (3 << 2);
116 break;
117 case GUARD_INTERVAL_1_32:
118 default:
119 /* tps |= (0 << 2) */;
120 }
121
122 switch (op->hierarchy_information) {
123 case HIERARCHY_1:
124 tps |= (1 << 10);
125 break;
126 case HIERARCHY_2:
127 tps |= (2 << 10);
128 break;
129 case HIERARCHY_4:
130 tps |= (3 << 10);
131 break;
132 case HIERARCHY_NONE:
133 default:
134 /* tps |= (0 << 10) */;
135 }
136
137 return tps;
138}
139
140struct cinergyt2_fe_state {
141 struct dvb_frontend fe;
142 struct dvb_usb_device *d;
143};
144
145static int cinergyt2_fe_read_status(struct dvb_frontend *fe,
146 fe_status_t *status)
147{
148 struct cinergyt2_fe_state *state = fe->demodulator_priv;
149 struct dvbt_get_status_msg result;
150 u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
151 int ret;
152
153 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&result,
154 sizeof(result), 0);
155 if (ret < 0)
156 return ret;
157
158 *status = 0;
159
160 if (0xffff - le16_to_cpu(result.gain) > 30)
161 *status |= FE_HAS_SIGNAL;
162 if (result.lock_bits & (1 << 6))
163 *status |= FE_HAS_LOCK;
164 if (result.lock_bits & (1 << 5))
165 *status |= FE_HAS_SYNC;
166 if (result.lock_bits & (1 << 4))
167 *status |= FE_HAS_CARRIER;
168 if (result.lock_bits & (1 << 1))
169 *status |= FE_HAS_VITERBI;
170
171 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
172 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
173 *status &= ~FE_HAS_LOCK;
174
175 return 0;
176}
177
178static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
179{
180 struct cinergyt2_fe_state *state = fe->demodulator_priv;
181 struct dvbt_get_status_msg status;
182 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
183 int ret;
184
185 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
186 sizeof(status), 0);
187 if (ret < 0)
188 return ret;
189
190 *ber = le32_to_cpu(status.viterbi_error_rate);
191 return 0;
192}
193
194static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
195{
196 struct cinergyt2_fe_state *state = fe->demodulator_priv;
197 struct dvbt_get_status_msg status;
198 u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
199 int ret;
200
201 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&status,
202 sizeof(status), 0);
203 if (ret < 0) {
204 err("cinergyt2_fe_read_unc_blocks() Failed! (Error=%d)\n",
205 ret);
206 return ret;
207 }
208 *unc = le32_to_cpu(status.uncorrected_block_count);
209 return 0;
210}
211
212static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe,
213 u16 *strength)
214{
215 struct cinergyt2_fe_state *state = fe->demodulator_priv;
216 struct dvbt_get_status_msg status;
217 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
218 int ret;
219
220 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
221 sizeof(status), 0);
222 if (ret < 0) {
223 err("cinergyt2_fe_read_signal_strength() Failed!"
224 " (Error=%d)\n", ret);
225 return ret;
226 }
227 *strength = (0xffff - le16_to_cpu(status.gain));
228 return 0;
229}
230
231static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
232{
233 struct cinergyt2_fe_state *state = fe->demodulator_priv;
234 struct dvbt_get_status_msg status;
235 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
236 int ret;
237
238 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
239 sizeof(status), 0);
240 if (ret < 0) {
241 err("cinergyt2_fe_read_snr() Failed! (Error=%d)\n", ret);
242 return ret;
243 }
244 *snr = (status.snr << 8) | status.snr;
245 return 0;
246}
247
248static int cinergyt2_fe_init(struct dvb_frontend *fe)
249{
250 return 0;
251}
252
253static int cinergyt2_fe_sleep(struct dvb_frontend *fe)
254{
255 deb_info("cinergyt2_fe_sleep() Called\n");
256 return 0;
257}
258
259static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe,
260 struct dvb_frontend_tune_settings *tune)
261{
262 tune->min_delay_ms = 800;
263 return 0;
264}
265
266static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe,
267 struct dvb_frontend_parameters *fep)
268{
269 struct cinergyt2_fe_state *state = fe->demodulator_priv;
270 struct dvbt_set_parameters_msg param;
271 char result[2];
272 int err;
273
274 param.cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
275 param.tps = cpu_to_le16(compute_tps(fep));
276 param.freq = cpu_to_le32(fep->frequency / 1000);
277 param.bandwidth = 8 - fep->u.ofdm.bandwidth - BANDWIDTH_8_MHZ;
278
279 err = dvb_usb_generic_rw(state->d,
280 (char *)&param, sizeof(param),
281 result, sizeof(result), 0);
282 if (err < 0)
283 err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err);
284
285 return (err < 0) ? err : 0;
286}
287
288static int cinergyt2_fe_get_frontend(struct dvb_frontend *fe,
289 struct dvb_frontend_parameters *fep)
290{
291 return 0;
292}
293
294static void cinergyt2_fe_release(struct dvb_frontend *fe)
295{
296 struct cinergyt2_fe_state *state = fe->demodulator_priv;
297 if (state != NULL)
298 kfree(state);
299}
300
301static struct dvb_frontend_ops cinergyt2_fe_ops;
302
303struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d)
304{
305 struct cinergyt2_fe_state *s = kzalloc(sizeof(
306 struct cinergyt2_fe_state), GFP_KERNEL);
307 if (s == NULL)
308 return NULL;
309
310 s->d = d;
311 memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops));
312 s->fe.demodulator_priv = s;
313 return &s->fe;
314}
315
316
317static struct dvb_frontend_ops cinergyt2_fe_ops = {
318 .info = {
319 .name = DRIVER_NAME,
320 .type = FE_OFDM,
321 .frequency_min = 174000000,
322 .frequency_max = 862000000,
323 .frequency_stepsize = 166667,
324 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2
325 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4
326 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8
327 | FE_CAN_FEC_AUTO | FE_CAN_QPSK
328 | FE_CAN_QAM_16 | FE_CAN_QAM_64
329 | FE_CAN_QAM_AUTO
330 | FE_CAN_TRANSMISSION_MODE_AUTO
331 | FE_CAN_GUARD_INTERVAL_AUTO
332 | FE_CAN_HIERARCHY_AUTO
333 | FE_CAN_RECOVER
334 | FE_CAN_MUTE_TS
335 },
336
337 .release = cinergyt2_fe_release,
338
339 .init = cinergyt2_fe_init,
340 .sleep = cinergyt2_fe_sleep,
341
342 .set_frontend = cinergyt2_fe_set_frontend,
343 .get_frontend = cinergyt2_fe_get_frontend,
344 .get_tune_settings = cinergyt2_fe_get_tune_settings,
345
346 .read_status = cinergyt2_fe_read_status,
347 .read_ber = cinergyt2_fe_read_ber,
348 .read_signal_strength = cinergyt2_fe_read_signal_strength,
349 .read_snr = cinergyt2_fe_read_snr,
350 .read_ucblocks = cinergyt2_fe_read_unc_blocks,
351};