Merge branch 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa
[linux-2.6] / drivers / media / dvb / dvb-usb / vp702x-fe.c
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 };