1 /* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.0
2 * DVB-S receiver.
3 *
4 * Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de>
5 * Metzler Brothers Systementwicklung GbR
6 *
7 * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de>
8 *
9 * Thanks to Twinhan who kindly provided hardware and information.
10 *
11 * This file can be removed soon, after the DST-driver is rewritten to provice
12 * the frontend-controlling separately.
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the Free
16 * Software Foundation, version 2.
17 *
18 * see Documentation/dvb/README.dvb-usb for more information
19 *
20 */
21 #include "vp702x.h"
22
23 struct vp702x_fe_state {
24 struct dvb_frontend fe;
25 struct dvb_usb_device *d;
26
27 struct dvb_frontend_ops ops;
28
29 fe_sec_voltage_t voltage;
30 fe_sec_tone_mode_t tone_mode;
31
32 u8 lnb_buf[8];
33
34 u8 lock;
35 u8 sig;
36 u8 snr;
37
38 unsigned long next_status_check;
39 unsigned long status_check_interval;
40 };
41
42 static int vp702x_fe_refresh_state(struct vp702x_fe_state *st)
43 {
44 u8 buf[10];
45 if (time_after(jiffies,st->next_status_check)) {
46 vp702x_usb_in_op(st->d,READ_STATUS,0,0,buf,10);
47
48 st->lock = buf[4];
49 vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x11,0,&st->snr,1);
50 vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x15,0,&st->sig,1);
51
52 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
53 }
54 return 0;
55 }
56
57 static u8 vp702x_chksum(u8 *buf,int f, int count)
58 {
59 u8 s = 0;
60 int i;
61 for (i = f; i < f+count; i++)
62 s += buf[i];
63 return ~s+1;
64 }
65
66 static int vp702x_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
67 {
68 struct vp702x_fe_state *st = fe->demodulator_priv;
69 vp702x_fe_refresh_state(st);
70 deb_fe("%s\n",__FUNCTION__);
71
72 if (st->lock == 0)
73 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
74 else
75 *status = 0;
76
77 if (*status & FE_HAS_LOCK)
78 st->status_check_interval = 1000;
79 else
80 st->status_check_interval = 250;
81 return 0;
82 }
83
84 /* not supported by this Frontend */
85 static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
86 {
87 struct vp702x_fe_state *st = fe->demodulator_priv;
88 vp702x_fe_refresh_state(st);
89 *ber = 0;
90 return 0;
91 }
92
93 /* not supported by this Frontend */
94 static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
95 {
96 struct vp702x_fe_state *st = fe->demodulator_priv;
97 vp702x_fe_refresh_state(st);
98 *unc = 0;
99 return 0;
100 }
101
102 static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
103 {
104 struct vp702x_fe_state *st = fe->demodulator_priv;
105 vp702x_fe_refresh_state(st);
106
107 *strength = (st->sig << 8) | st->sig;
108 return 0;
109 }
110
111 static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
112 {
113 u8 _snr;
114 struct vp702x_fe_state *st = fe->demodulator_priv;
115 vp702x_fe_refresh_state(st);
116
117 _snr = (st->snr & 0x1f) * 0xff / 0x1f;
118 *snr = (_snr << 8) | _snr;
119 return 0;
120 }
121
122 static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
123 {
124 deb_fe("%s\n",__FUNCTION__);
125 tune->min_delay_ms = 2000;
126 return 0;
127 }
128
129 static int vp702x_fe_set_frontend(struct dvb_frontend* fe,
130 struct dvb_frontend_parameters *fep)
131 {
132 struct vp702x_fe_state *st = fe->demodulator_priv;
133 u32 freq = fep->frequency/1000;
134 /*CalFrequency*/
135 /* u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */
136 u64 sr;
137 u8 cmd[8] = { 0 },ibuf[10];
138
139 cmd[0] = (freq >> 8) & 0x7f;
140 cmd[1] = freq & 0xff;
141 cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */
142
143 sr = (u64) (fep->u.qpsk.symbol_rate/1000) << 20;
144 do_div(sr,88000);
145 cmd[3] = (sr >> 12) & 0xff;
146 cmd[4] = (sr >> 4) & 0xff;
147 cmd[5] = (sr << 4) & 0xf0;
148
149 deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n",
150 fep->frequency,freq,freq, fep->u.qpsk.symbol_rate,
151 (unsigned long) sr, (unsigned long) sr);
152
153 /* if (fep->inversion == INVERSION_ON)
154 cmd[6] |= 0x80; */
155
156 if (st->voltage == SEC_VOLTAGE_18)
157 cmd[6] |= 0x40;
158
159 /* if (fep->u.qpsk.symbol_rate > 8000000)
160 cmd[6] |= 0x20;
161
162 if (fep->frequency < 1531000)
163 cmd[6] |= 0x04;
164
165 if (st->tone_mode == SEC_TONE_ON)
166 cmd[6] |= 0x01;*/
167
168 cmd[7] = vp702x_chksum(cmd,0,7);
169
170 st->status_check_interval = 250;
171 st->next_status_check = jiffies;
172
173 vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
174
175 if (ibuf[2] == 0 && ibuf[3] == 0)
176 deb_fe("tuning failed.\n");
177 else
178 deb_fe("tuning succeeded.\n");
179
180 return 0;
181 }
182
183 static int vp702x_fe_init(struct dvb_frontend *fe)
184 {
185 struct vp702x_fe_state *st = fe->demodulator_priv;
186 deb_fe("%s\n",__FUNCTION__);
187 vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
188 return 0;
189 }
190
191 static int vp702x_fe_sleep(struct dvb_frontend *fe)
192 {
193 deb_fe("%s\n",__FUNCTION__);
194 return 0;
195 }
196
197 static int vp702x_fe_get_frontend(struct dvb_frontend* fe,
198 struct dvb_frontend_parameters *fep)
199 {
200 deb_fe("%s\n",__FUNCTION__);
201 return 0;
202 }
203
204 static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
205 struct dvb_diseqc_master_cmd *m)
206 {
207 struct vp702x_fe_state *st = fe->demodulator_priv;
208 u8 cmd[8],ibuf[10];
209 memset(cmd,0,8);
210
211 deb_fe("%s\n",__FUNCTION__);
212
213 if (m->msg_len > 4)
214 return -EINVAL;
215
216 cmd[1] = SET_DISEQC_CMD;
217 cmd[2] = m->msg_len;
218 memcpy(&cmd[3], m->msg, m->msg_len);
219 cmd[7] = vp702x_chksum(cmd,0,7);
220
221 vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
222
223 if (ibuf[2] == 0 && ibuf[3] == 0)
224 deb_fe("diseqc cmd failed.\n");
225 else
226 deb_fe("diseqc cmd succeeded.\n");
227
228 return 0;
229 }
230
231 static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
232 {
233 deb_fe("%s\n",__FUNCTION__);
234 return 0;
235 }
236
237 static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
238 {
239 struct vp702x_fe_state *st = fe->demodulator_priv;
240 u8 ibuf[10];
241 deb_fe("%s\n",__FUNCTION__);
242
243 st->tone_mode = tone;
244
245 if (tone == SEC_TONE_ON)
246 st->lnb_buf[2] = 0x02;
247 else
248 st->lnb_buf[2] = 0x00;
249
250 st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
251
252 vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
253 if (ibuf[2] == 0 && ibuf[3] == 0)
254 deb_fe("set_tone cmd failed.\n");
255 else
256 deb_fe("set_tone cmd succeeded.\n");
257
258 return 0;
259 }
260
261 static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t
262 voltage)
263 {
264 struct vp702x_fe_state *st = fe->demodulator_priv;
265 u8 ibuf[10];
266 deb_fe("%s\n",__FUNCTION__);
267
268 st->voltage = voltage;
269
270 if (voltage != SEC_VOLTAGE_OFF)
271 st->lnb_buf[4] = 0x01;
272 else
273 st->lnb_buf[4] = 0x00;
274
275 st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
276
277 vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
278 if (ibuf[2] == 0 && ibuf[3] == 0)
279 deb_fe("set_voltage cmd failed.\n");
280 else
281 deb_fe("set_voltage cmd succeeded.\n");
282
283 return 0;
284 }
285
286 static void vp702x_fe_release(struct dvb_frontend* fe)
287 {
288 struct vp702x_fe_state *st = fe->demodulator_priv;
289 kfree(st);
290 }
291
292 static struct dvb_frontend_ops vp702x_fe_ops;
293
294 struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
295 {
296 struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
297 if (s == NULL)
298 goto error;
299
300 s->d = d;
301
302 memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));
303 s->fe.demodulator_priv = s;
304
305 s->lnb_buf[1] = SET_LNB_POWER;
306 s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
307
308 return &s->fe;
309 error:
310 return NULL;
311 }
312
313
314 static struct dvb_frontend_ops vp702x_fe_ops = {
315 .info = {
316 .name = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
317 .type = FE_QPSK,
318 .frequency_min = 950000,
319 .frequency_max = 2150000,
320 .frequency_stepsize = 1000, /* kHz for QPSK frontends */
321 .frequency_tolerance = 0,
322 .symbol_rate_min = 1000000,
323 .symbol_rate_max = 45000000,
324 .symbol_rate_tolerance = 500, /* ppm */
325 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
326 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
327 FE_CAN_QPSK |
328 FE_CAN_FEC_AUTO
329 },
330 .release = vp702x_fe_release,
331
332 .init = vp702x_fe_init,
333 .sleep = vp702x_fe_sleep,
334
335 .set_frontend = vp702x_fe_set_frontend,
336 .get_frontend = vp702x_fe_get_frontend,
337 .get_tune_settings = vp702x_fe_get_tune_settings,
338
339 .read_status = vp702x_fe_read_status,
340 .read_ber = vp702x_fe_read_ber,
341 .read_signal_strength = vp702x_fe_read_signal_strength,
342 .read_snr = vp702x_fe_read_snr,
343 .read_ucblocks = vp702x_fe_read_unc_blocks,
344
345 .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
346 .diseqc_send_burst = vp702x_fe_send_diseqc_burst,
347 .set_tone = vp702x_fe_set_tone,
348 .set_voltage = vp702x_fe_set_voltage,
349 };
350
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