V4L/DVB (5716): Tda10086,tda826x: fix tuning, STR/SNR values
[linux-2.6.git] / drivers / media / dvb / frontends / tda10086.c
1   /*
2      Driver for Philips tda10086 DVBS Demodulator
3
4      (c) 2006 Andrew de Quincey
5
6      This program is free software; you can redistribute it and/or modify
7      it under the terms of the GNU General Public License as published by
8      the Free Software Foundation; either version 2 of the License, or
9      (at your option) any later version.
10
11      This program is distributed in the hope that it will be useful,
12      but WITHOUT ANY WARRANTY; without even the implied warranty of
13      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
15      GNU General Public License for more details.
16
17      You should have received a copy of the GNU General Public License
18      along with this program; if not, write to the Free Software
19      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21    */
22
23 #include <linux/init.h>
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/device.h>
27 #include <linux/jiffies.h>
28 #include <linux/string.h>
29 #include <linux/slab.h>
30
31 #include "dvb_frontend.h"
32 #include "tda10086.h"
33
34 #define SACLK 96000000
35
36 struct tda10086_state {
37         struct i2c_adapter* i2c;
38         const struct tda10086_config* config;
39         struct dvb_frontend frontend;
40
41         /* private demod data */
42         u32 frequency;
43         u32 symbol_rate;
44         bool has_lock;
45 };
46
47 static int debug = 0;
48 #define dprintk(args...) \
49         do { \
50                 if (debug) printk(KERN_DEBUG "tda10086: " args); \
51         } while (0)
52
53 static int tda10086_write_byte(struct tda10086_state *state, int reg, int data)
54 {
55         int ret;
56         u8 b0[] = { reg, data };
57         struct i2c_msg msg = { .flags = 0, .buf = b0, .len = 2 };
58
59         msg.addr = state->config->demod_address;
60         ret = i2c_transfer(state->i2c, &msg, 1);
61
62         if (ret != 1)
63                 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
64                         __FUNCTION__, reg, data, ret);
65
66         return (ret != 1) ? ret : 0;
67 }
68
69 static int tda10086_read_byte(struct tda10086_state *state, int reg)
70 {
71         int ret;
72         u8 b0[] = { reg };
73         u8 b1[] = { 0 };
74         struct i2c_msg msg[] = {{ .flags = 0, .buf = b0, .len = 1 },
75                                 { .flags = I2C_M_RD, .buf = b1, .len = 1 }};
76
77         msg[0].addr = state->config->demod_address;
78         msg[1].addr = state->config->demod_address;
79         ret = i2c_transfer(state->i2c, msg, 2);
80
81         if (ret != 2) {
82                 dprintk("%s: error reg=0x%x, ret=%i\n", __FUNCTION__, reg,
83                         ret);
84                 return ret;
85         }
86
87         return b1[0];
88 }
89
90 static int tda10086_write_mask(struct tda10086_state *state, int reg, int mask, int data)
91 {
92         int val;
93
94         // read a byte and check
95         val = tda10086_read_byte(state, reg);
96         if (val < 0)
97                 return val;
98
99         // mask if off
100         val = val & ~mask;
101         val |= data & 0xff;
102
103         // write it out again
104         return tda10086_write_byte(state, reg, val);
105 }
106
107 static int tda10086_init(struct dvb_frontend* fe)
108 {
109         struct tda10086_state* state = fe->demodulator_priv;
110
111         dprintk ("%s\n", __FUNCTION__);
112
113         // reset
114         tda10086_write_byte(state, 0x00, 0x00);
115         msleep(10);
116
117         // misc setup
118         tda10086_write_byte(state, 0x01, 0x94);
119         tda10086_write_byte(state, 0x02, 0x35); // NOTE: TT drivers appear to disable CSWP
120         tda10086_write_byte(state, 0x03, 0xe4);
121         tda10086_write_byte(state, 0x04, 0x43);
122         tda10086_write_byte(state, 0x0c, 0x0c);
123         tda10086_write_byte(state, 0x1b, 0xb0); // noise threshold
124         tda10086_write_byte(state, 0x20, 0x89); // misc
125         tda10086_write_byte(state, 0x30, 0x04); // acquisition period length
126         tda10086_write_byte(state, 0x32, 0x00); // irq off
127         tda10086_write_byte(state, 0x31, 0x56); // setup AFC
128
129         // setup PLL (assumes 16Mhz XIN)
130         tda10086_write_byte(state, 0x55, 0x2c); // misc PLL setup
131         tda10086_write_byte(state, 0x3a, 0x0b); // M=12
132         tda10086_write_byte(state, 0x3b, 0x01); // P=2
133         tda10086_write_mask(state, 0x55, 0x20, 0x00); // powerup PLL
134
135         // setup TS interface
136         tda10086_write_byte(state, 0x11, 0x81);
137         tda10086_write_byte(state, 0x12, 0x81);
138         tda10086_write_byte(state, 0x19, 0x40); // parallel mode A + MSBFIRST
139         tda10086_write_byte(state, 0x56, 0x80); // powerdown WPLL - unused in the mode we use
140         tda10086_write_byte(state, 0x57, 0x08); // bypass WPLL - unused in the mode we use
141         tda10086_write_byte(state, 0x10, 0x2a);
142
143         // setup ADC
144         tda10086_write_byte(state, 0x58, 0x61); // ADC setup
145         tda10086_write_mask(state, 0x58, 0x01, 0x00); // powerup ADC
146
147         // setup AGC
148         tda10086_write_byte(state, 0x05, 0x0B);
149         tda10086_write_byte(state, 0x37, 0x63);
150         tda10086_write_byte(state, 0x3f, 0x0a); // NOTE: flydvb varies it
151         tda10086_write_byte(state, 0x40, 0x64);
152         tda10086_write_byte(state, 0x41, 0x4f);
153         tda10086_write_byte(state, 0x42, 0x43);
154
155         // setup viterbi
156         tda10086_write_byte(state, 0x1a, 0x11); // VBER 10^6, DVB, QPSK
157
158         // setup carrier recovery
159         tda10086_write_byte(state, 0x3d, 0x80);
160
161         // setup SEC
162         tda10086_write_byte(state, 0x36, 0x00); // all SEC off
163         tda10086_write_byte(state, 0x34, (((1<<19) * (22000/1000)) / (SACLK/1000)));      // } tone frequency
164         tda10086_write_byte(state, 0x35, (((1<<19) * (22000/1000)) / (SACLK/1000)) >> 8); // }
165
166         return 0;
167 }
168
169 static void tda10086_diseqc_wait(struct tda10086_state *state)
170 {
171         unsigned long timeout = jiffies + msecs_to_jiffies(200);
172         while (!(tda10086_read_byte(state, 0x50) & 0x01)) {
173                 if(time_after(jiffies, timeout)) {
174                         printk("%s: diseqc queue not ready, command may be lost.\n", __FUNCTION__);
175                         break;
176                 }
177                 msleep(10);
178         }
179 }
180
181 static int tda10086_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
182 {
183         struct tda10086_state* state = fe->demodulator_priv;
184
185         dprintk ("%s\n", __FUNCTION__);
186
187         switch(tone) {
188         case SEC_TONE_OFF:
189                 tda10086_write_byte(state, 0x36, 0x00);
190                 break;
191
192         case SEC_TONE_ON:
193                 tda10086_write_byte(state, 0x36, 0x01);
194                 break;
195         }
196
197         return 0;
198 }
199
200 static int tda10086_send_master_cmd (struct dvb_frontend* fe,
201                                     struct dvb_diseqc_master_cmd* cmd)
202 {
203         struct tda10086_state* state = fe->demodulator_priv;
204         int i;
205         u8 oldval;
206
207         dprintk ("%s\n", __FUNCTION__);
208
209         if (cmd->msg_len > 6)
210                 return -EINVAL;
211         oldval = tda10086_read_byte(state, 0x36);
212
213         for(i=0; i< cmd->msg_len; i++) {
214                 tda10086_write_byte(state, 0x48+i, cmd->msg[i]);
215         }
216         tda10086_write_byte(state, 0x36, 0x08 | ((cmd->msg_len - 1) << 4));
217
218         tda10086_diseqc_wait(state);
219
220         tda10086_write_byte(state, 0x36, oldval);
221
222         return 0;
223 }
224
225 static int tda10086_send_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd)
226 {
227         struct tda10086_state* state = fe->demodulator_priv;
228         u8 oldval = tda10086_read_byte(state, 0x36);
229
230         dprintk ("%s\n", __FUNCTION__);
231
232         switch(minicmd) {
233         case SEC_MINI_A:
234                 tda10086_write_byte(state, 0x36, 0x04);
235                 break;
236
237         case SEC_MINI_B:
238                 tda10086_write_byte(state, 0x36, 0x06);
239                 break;
240         }
241
242         tda10086_diseqc_wait(state);
243
244         tda10086_write_byte(state, 0x36, oldval);
245
246         return 0;
247 }
248
249 static int tda10086_set_inversion(struct tda10086_state *state,
250                                   struct dvb_frontend_parameters *fe_params)
251 {
252         u8 invval = 0x80;
253
254         dprintk ("%s %i %i\n", __FUNCTION__, fe_params->inversion, state->config->invert);
255
256         switch(fe_params->inversion) {
257         case INVERSION_OFF:
258                 if (state->config->invert)
259                         invval = 0x40;
260                 break;
261         case INVERSION_ON:
262                 if (!state->config->invert)
263                         invval = 0x40;
264                 break;
265         case INVERSION_AUTO:
266                 invval = 0x00;
267                 break;
268         }
269         tda10086_write_mask(state, 0x0c, 0xc0, invval);
270
271         return 0;
272 }
273
274 static int tda10086_set_symbol_rate(struct tda10086_state *state,
275                                     struct dvb_frontend_parameters *fe_params)
276 {
277         u8 dfn = 0;
278         u8 afs = 0;
279         u8 byp = 0;
280         u8 reg37 = 0x43;
281         u8 reg42 = 0x43;
282         u64 big;
283         u32 tmp;
284         u32 bdr;
285         u32 bdri;
286         u32 symbol_rate = fe_params->u.qpsk.symbol_rate;
287
288         dprintk ("%s %i\n", __FUNCTION__, symbol_rate);
289
290         // setup the decimation and anti-aliasing filters..
291         if (symbol_rate < (u32) (SACLK * 0.0137)) {
292                 dfn=4;
293                 afs=1;
294         } else if (symbol_rate < (u32) (SACLK * 0.0208)) {
295                 dfn=4;
296                 afs=0;
297         } else if (symbol_rate < (u32) (SACLK * 0.0270)) {
298                 dfn=3;
299                 afs=1;
300         } else if (symbol_rate < (u32) (SACLK * 0.0416)) {
301                 dfn=3;
302                 afs=0;
303         } else if (symbol_rate < (u32) (SACLK * 0.0550)) {
304                 dfn=2;
305                 afs=1;
306         } else if (symbol_rate < (u32) (SACLK * 0.0833)) {
307                 dfn=2;
308                 afs=0;
309         } else if (symbol_rate < (u32) (SACLK * 0.1100)) {
310                 dfn=1;
311                 afs=1;
312         } else if (symbol_rate < (u32) (SACLK * 0.1666)) {
313                 dfn=1;
314                 afs=0;
315         } else if (symbol_rate < (u32) (SACLK * 0.2200)) {
316                 dfn=0;
317                 afs=1;
318         } else if (symbol_rate < (u32) (SACLK * 0.3333)) {
319                 dfn=0;
320                 afs=0;
321         } else {
322                 reg37 = 0x63;
323                 reg42 = 0x4f;
324                 byp=1;
325         }
326
327         // calculate BDR
328         big = (1ULL<<21) * ((u64) symbol_rate/1000ULL) * (1ULL<<dfn);
329         big += ((SACLK/1000ULL)-1ULL);
330         do_div(big, (SACLK/1000ULL));
331         bdr = big & 0xfffff;
332
333         // calculate BDRI
334         tmp = (1<<dfn)*(symbol_rate/1000);
335         bdri = ((32 * (SACLK/1000)) + (tmp-1)) / tmp;
336
337         tda10086_write_byte(state, 0x21, (afs << 7) | dfn);
338         tda10086_write_mask(state, 0x20, 0x08, byp << 3);
339         tda10086_write_byte(state, 0x06, bdr);
340         tda10086_write_byte(state, 0x07, bdr >> 8);
341         tda10086_write_byte(state, 0x08, bdr >> 16);
342         tda10086_write_byte(state, 0x09, bdri);
343         tda10086_write_byte(state, 0x37, reg37);
344         tda10086_write_byte(state, 0x42, reg42);
345
346         return 0;
347 }
348
349 static int tda10086_set_fec(struct tda10086_state *state,
350                             struct dvb_frontend_parameters *fe_params)
351 {
352         u8 fecval;
353
354         dprintk ("%s %i\n", __FUNCTION__, fe_params->u.qpsk.fec_inner);
355
356         switch(fe_params->u.qpsk.fec_inner) {
357         case FEC_1_2:
358                 fecval = 0x00;
359                 break;
360         case FEC_2_3:
361                 fecval = 0x01;
362                 break;
363         case FEC_3_4:
364                 fecval = 0x02;
365                 break;
366         case FEC_4_5:
367                 fecval = 0x03;
368                 break;
369         case FEC_5_6:
370                 fecval = 0x04;
371                 break;
372         case FEC_6_7:
373                 fecval = 0x05;
374                 break;
375         case FEC_7_8:
376                 fecval = 0x06;
377                 break;
378         case FEC_8_9:
379                 fecval = 0x07;
380                 break;
381         case FEC_AUTO:
382                 fecval = 0x08;
383                 break;
384         default:
385                 return -1;
386         }
387         tda10086_write_byte(state, 0x0d, fecval);
388
389         return 0;
390 }
391
392 static int tda10086_set_frontend(struct dvb_frontend* fe,
393                                  struct dvb_frontend_parameters *fe_params)
394 {
395         struct tda10086_state *state = fe->demodulator_priv;
396         int ret;
397         u32 freq = 0;
398         int freqoff;
399
400         dprintk ("%s\n", __FUNCTION__);
401
402         // modify parameters for tuning
403         tda10086_write_byte(state, 0x02, 0x35);
404         state->has_lock = false;
405
406         // set params
407         if (fe->ops.tuner_ops.set_params) {
408                 fe->ops.tuner_ops.set_params(fe, fe_params);
409                 if (fe->ops.i2c_gate_ctrl)
410                         fe->ops.i2c_gate_ctrl(fe, 0);
411
412                 if (fe->ops.tuner_ops.get_frequency)
413                         fe->ops.tuner_ops.get_frequency(fe, &freq);
414                 if (fe->ops.i2c_gate_ctrl)
415                         fe->ops.i2c_gate_ctrl(fe, 0);
416         }
417
418         // calcluate the frequency offset (in *Hz* not kHz)
419         freqoff = fe_params->frequency - freq;
420         freqoff = ((1<<16) * freqoff) / (SACLK/1000);
421         tda10086_write_byte(state, 0x3d, 0x80 | ((freqoff >> 8) & 0x7f));
422         tda10086_write_byte(state, 0x3e, freqoff);
423
424         if ((ret = tda10086_set_inversion(state, fe_params)) < 0)
425                 return ret;
426         if ((ret = tda10086_set_symbol_rate(state, fe_params)) < 0)
427                 return ret;
428         if ((ret = tda10086_set_fec(state, fe_params)) < 0)
429                 return ret;
430
431         // soft reset + disable TS output until lock
432         tda10086_write_mask(state, 0x10, 0x40, 0x40);
433         tda10086_write_mask(state, 0x00, 0x01, 0x00);
434
435         state->symbol_rate = fe_params->u.qpsk.symbol_rate;
436         state->frequency = fe_params->frequency;
437         return 0;
438 }
439
440 static int tda10086_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *fe_params)
441 {
442         struct tda10086_state* state = fe->demodulator_priv;
443         u8 val;
444         int tmp;
445         u64 tmp64;
446
447         dprintk ("%s\n", __FUNCTION__);
448
449         // check for invalid symbol rate
450         if (fe_params->u.qpsk.symbol_rate < 500000)
451                 return -EINVAL;
452
453         // calculate the updated frequency (note: we convert from Hz->kHz)
454         tmp64 = tda10086_read_byte(state, 0x52);
455         tmp64 |= (tda10086_read_byte(state, 0x51) << 8);
456         if (tmp64 & 0x8000)
457                 tmp64 |= 0xffffffffffff0000ULL;
458         tmp64 = (tmp64 * (SACLK/1000ULL));
459         do_div(tmp64, (1ULL<<15) * (1ULL<<1));
460         fe_params->frequency = (int) state->frequency + (int) tmp64;
461
462         // the inversion
463         val = tda10086_read_byte(state, 0x0c);
464         if (val & 0x80) {
465                 switch(val & 0x40) {
466                 case 0x00:
467                         fe_params->inversion = INVERSION_OFF;
468                         if (state->config->invert)
469                                 fe_params->inversion = INVERSION_ON;
470                         break;
471                 default:
472                         fe_params->inversion = INVERSION_ON;
473                         if (state->config->invert)
474                                 fe_params->inversion = INVERSION_OFF;
475                         break;
476                 }
477         } else {
478                 tda10086_read_byte(state, 0x0f);
479                 switch(val & 0x02) {
480                 case 0x00:
481                         fe_params->inversion = INVERSION_OFF;
482                         if (state->config->invert)
483                                 fe_params->inversion = INVERSION_ON;
484                         break;
485                 default:
486                         fe_params->inversion = INVERSION_ON;
487                         if (state->config->invert)
488                                 fe_params->inversion = INVERSION_OFF;
489                         break;
490                 }
491         }
492
493         // calculate the updated symbol rate
494         tmp = tda10086_read_byte(state, 0x1d);
495         if (tmp & 0x80)
496                 tmp |= 0xffffff00;
497         tmp = (tmp * 480 * (1<<1)) / 128;
498         tmp = ((state->symbol_rate/1000) * tmp) / (1000000/1000);
499         fe_params->u.qpsk.symbol_rate = state->symbol_rate + tmp;
500
501         // the FEC
502         val = (tda10086_read_byte(state, 0x0d) & 0x70) >> 4;
503         switch(val) {
504         case 0x00:
505                 fe_params->u.qpsk.fec_inner = FEC_1_2;
506                 break;
507         case 0x01:
508                 fe_params->u.qpsk.fec_inner = FEC_2_3;
509                 break;
510         case 0x02:
511                 fe_params->u.qpsk.fec_inner = FEC_3_4;
512                 break;
513         case 0x03:
514                 fe_params->u.qpsk.fec_inner = FEC_4_5;
515                 break;
516         case 0x04:
517                 fe_params->u.qpsk.fec_inner = FEC_5_6;
518                 break;
519         case 0x05:
520                 fe_params->u.qpsk.fec_inner = FEC_6_7;
521                 break;
522         case 0x06:
523                 fe_params->u.qpsk.fec_inner = FEC_7_8;
524                 break;
525         case 0x07:
526                 fe_params->u.qpsk.fec_inner = FEC_8_9;
527                 break;
528         }
529
530         return 0;
531 }
532
533 static int tda10086_read_status(struct dvb_frontend* fe, fe_status_t *fe_status)
534 {
535         struct tda10086_state* state = fe->demodulator_priv;
536         u8 val;
537
538         dprintk ("%s\n", __FUNCTION__);
539
540         val = tda10086_read_byte(state, 0x0e);
541         *fe_status = 0;
542         if (val & 0x01)
543                 *fe_status |= FE_HAS_SIGNAL;
544         if (val & 0x02)
545                 *fe_status |= FE_HAS_CARRIER;
546         if (val & 0x04)
547                 *fe_status |= FE_HAS_VITERBI;
548         if (val & 0x08)
549                 *fe_status |= FE_HAS_SYNC;
550         if (val & 0x10) {
551                 *fe_status |= FE_HAS_LOCK;
552                 if (!state->has_lock) {
553                         state->has_lock = true;
554                         // modify parameters for stable reception
555                         tda10086_write_byte(state, 0x02, 0x00);
556                 }
557         }
558
559         return 0;
560 }
561
562 static int tda10086_read_signal_strength(struct dvb_frontend* fe, u16 * signal)
563 {
564         struct tda10086_state* state = fe->demodulator_priv;
565         u8 _str;
566
567         dprintk ("%s\n", __FUNCTION__);
568
569         _str = 0xff - tda10086_read_byte(state, 0x43);
570         *signal = (_str << 8) | _str;
571
572         return 0;
573 }
574
575 static int tda10086_read_snr(struct dvb_frontend* fe, u16 * snr)
576 {
577         struct tda10086_state* state = fe->demodulator_priv;
578         u8 _snr;
579
580         dprintk ("%s\n", __FUNCTION__);
581
582         _snr = 0xff - tda10086_read_byte(state, 0x1c);
583         *snr = (_snr << 8) | _snr;
584
585         return 0;
586 }
587
588 static int tda10086_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
589 {
590         struct tda10086_state* state = fe->demodulator_priv;
591
592         dprintk ("%s\n", __FUNCTION__);
593
594         // read it
595         *ucblocks = tda10086_read_byte(state, 0x18) & 0x7f;
596
597         // reset counter
598         tda10086_write_byte(state, 0x18, 0x00);
599         tda10086_write_byte(state, 0x18, 0x80);
600
601         return 0;
602 }
603
604 static int tda10086_read_ber(struct dvb_frontend* fe, u32* ber)
605 {
606         struct tda10086_state* state = fe->demodulator_priv;
607
608         dprintk ("%s\n", __FUNCTION__);
609
610         // read it
611         *ber = 0;
612         *ber |= tda10086_read_byte(state, 0x15);
613         *ber |= tda10086_read_byte(state, 0x16) << 8;
614         *ber |= (tda10086_read_byte(state, 0x17) & 0xf) << 16;
615
616         return 0;
617 }
618
619 static int tda10086_sleep(struct dvb_frontend* fe)
620 {
621         struct tda10086_state* state = fe->demodulator_priv;
622
623         dprintk ("%s\n", __FUNCTION__);
624
625         tda10086_write_mask(state, 0x00, 0x08, 0x08);
626
627         return 0;
628 }
629
630 static int tda10086_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
631 {
632         struct tda10086_state* state = fe->demodulator_priv;
633
634         dprintk ("%s\n", __FUNCTION__);
635
636         if (enable) {
637                 tda10086_write_mask(state, 0x00, 0x10, 0x10);
638         } else {
639                 tda10086_write_mask(state, 0x00, 0x10, 0x00);
640         }
641
642         return 0;
643 }
644
645 static int tda10086_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
646 {
647         if (fesettings->parameters.u.qpsk.symbol_rate > 20000000) {
648                 fesettings->min_delay_ms = 50;
649                 fesettings->step_size = 2000;
650                 fesettings->max_drift = 8000;
651         } else if (fesettings->parameters.u.qpsk.symbol_rate > 12000000) {
652                 fesettings->min_delay_ms = 100;
653                 fesettings->step_size = 1500;
654                 fesettings->max_drift = 9000;
655         } else if (fesettings->parameters.u.qpsk.symbol_rate > 8000000) {
656                 fesettings->min_delay_ms = 100;
657                 fesettings->step_size = 1000;
658                 fesettings->max_drift = 8000;
659         } else if (fesettings->parameters.u.qpsk.symbol_rate > 4000000) {
660                 fesettings->min_delay_ms = 100;
661                 fesettings->step_size = 500;
662                 fesettings->max_drift = 7000;
663         } else if (fesettings->parameters.u.qpsk.symbol_rate > 2000000) {
664                 fesettings->min_delay_ms = 200;
665                 fesettings->step_size = (fesettings->parameters.u.qpsk.symbol_rate / 8000);
666                 fesettings->max_drift = 14 * fesettings->step_size;
667         } else {
668                 fesettings->min_delay_ms = 200;
669                 fesettings->step_size = (fesettings->parameters.u.qpsk.symbol_rate / 8000);
670                 fesettings->max_drift = 18 * fesettings->step_size;
671         }
672
673         return 0;
674 }
675
676 static void tda10086_release(struct dvb_frontend* fe)
677 {
678         struct tda10086_state *state = fe->demodulator_priv;
679         tda10086_sleep(fe);
680         kfree(state);
681 }
682
683 static struct dvb_frontend_ops tda10086_ops = {
684
685         .info = {
686                 .name     = "Philips TDA10086 DVB-S",
687                 .type     = FE_QPSK,
688                 .frequency_min    = 950000,
689                 .frequency_max    = 2150000,
690                 .frequency_stepsize = 125,     /* kHz for QPSK frontends */
691                 .symbol_rate_min  = 1000000,
692                 .symbol_rate_max  = 45000000,
693                 .caps = FE_CAN_INVERSION_AUTO |
694                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
695                         FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
696                         FE_CAN_QPSK
697         },
698
699         .release = tda10086_release,
700
701         .init = tda10086_init,
702         .sleep = tda10086_sleep,
703         .i2c_gate_ctrl = tda10086_i2c_gate_ctrl,
704
705         .set_frontend = tda10086_set_frontend,
706         .get_frontend = tda10086_get_frontend,
707         .get_tune_settings = tda10086_get_tune_settings,
708
709         .read_status = tda10086_read_status,
710         .read_ber = tda10086_read_ber,
711         .read_signal_strength = tda10086_read_signal_strength,
712         .read_snr = tda10086_read_snr,
713         .read_ucblocks = tda10086_read_ucblocks,
714
715         .diseqc_send_master_cmd = tda10086_send_master_cmd,
716         .diseqc_send_burst = tda10086_send_burst,
717         .set_tone = tda10086_set_tone,
718 };
719
720 struct dvb_frontend* tda10086_attach(const struct tda10086_config* config,
721                                      struct i2c_adapter* i2c)
722 {
723         struct tda10086_state *state;
724
725         dprintk ("%s\n", __FUNCTION__);
726
727         /* allocate memory for the internal state */
728         state = kmalloc(sizeof(struct tda10086_state), GFP_KERNEL);
729         if (!state)
730                 return NULL;
731
732         /* setup the state */
733         state->config = config;
734         state->i2c = i2c;
735
736         /* check if the demod is there */
737         if (tda10086_read_byte(state, 0x1e) != 0xe1) {
738                 kfree(state);
739                 return NULL;
740         }
741
742         /* create dvb_frontend */
743         memcpy(&state->frontend.ops, &tda10086_ops, sizeof(struct dvb_frontend_ops));
744         state->frontend.demodulator_priv = state;
745         return &state->frontend;
746 }
747
748 module_param(debug, int, 0644);
749 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
750
751 MODULE_DESCRIPTION("Philips TDA10086 DVB-S Demodulator");
752 MODULE_AUTHOR("Andrew de Quincey");
753 MODULE_LICENSE("GPL");
754
755 EXPORT_SYMBOL(tda10086_attach);