Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / 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/device.h>
26 #include <linux/jiffies.h>
27 #include <linux/string.h>
28 #include <linux/slab.h>
29
30 #include "dvb_frontend.h"
31 #include "tda10086.h"
32
33 #define SACLK 96000000
34
35 struct tda10086_state {
36         struct i2c_adapter* i2c;
37         const struct tda10086_config* config;
38         struct dvb_frontend frontend;
39
40         /* private demod data */
41         u32 frequency;
42         u32 symbol_rate;
43         bool has_lock;
44 };
45
46 static int debug;
47 #define dprintk(args...) \
48         do { \
49                 if (debug) printk(KERN_DEBUG "tda10086: " args); \
50         } while (0)
51
52 static int tda10086_write_byte(struct tda10086_state *state, int reg, int data)
53 {
54         int ret;
55         u8 b0[] = { reg, data };
56         struct i2c_msg msg = { .flags = 0, .buf = b0, .len = 2 };
57
58         msg.addr = state->config->demod_address;
59         ret = i2c_transfer(state->i2c, &msg, 1);
60
61         if (ret != 1)
62                 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
63                         __func__, reg, data, ret);
64
65         return (ret != 1) ? ret : 0;
66 }
67
68 static int tda10086_read_byte(struct tda10086_state *state, int reg)
69 {
70         int ret;
71         u8 b0[] = { reg };
72         u8 b1[] = { 0 };
73         struct i2c_msg msg[] = {{ .flags = 0, .buf = b0, .len = 1 },
74                                 { .flags = I2C_M_RD, .buf = b1, .len = 1 }};
75
76         msg[0].addr = state->config->demod_address;
77         msg[1].addr = state->config->demod_address;
78         ret = i2c_transfer(state->i2c, msg, 2);
79
80         if (ret != 2) {
81                 dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg,
82                         ret);
83                 return ret;
84         }
85
86         return b1[0];
87 }
88
89 static int tda10086_write_mask(struct tda10086_state *state, int reg, int mask, int data)
90 {
91         int val;
92
93         /* read a byte and check */
94         val = tda10086_read_byte(state, reg);
95         if (val < 0)
96                 return val;
97
98         /* mask if off */
99         val = val & ~mask;
100         val |= data & 0xff;
101
102         /* write it out again */
103         return tda10086_write_byte(state, reg, val);
104 }
105
106 static int tda10086_init(struct dvb_frontend* fe)
107 {
108         struct tda10086_state* state = fe->demodulator_priv;
109         u8 t22k_off = 0x80;
110
111         dprintk ("%s\n", __func__);
112
113         if (state->config->diseqc_tone)
114                 t22k_off = 0;
115         /* reset */
116         tda10086_write_byte(state, 0x00, 0x00);
117         msleep(10);
118
119         /* misc setup */
120         tda10086_write_byte(state, 0x01, 0x94);
121         tda10086_write_byte(state, 0x02, 0x35); /* NOTE: TT drivers appear to disable CSWP */
122         tda10086_write_byte(state, 0x03, 0xe4);
123         tda10086_write_byte(state, 0x04, 0x43);
124         tda10086_write_byte(state, 0x0c, 0x0c);
125         tda10086_write_byte(state, 0x1b, 0xb0); /* noise threshold */
126         tda10086_write_byte(state, 0x20, 0x89); /* misc */
127         tda10086_write_byte(state, 0x30, 0x04); /* acquisition period length */
128         tda10086_write_byte(state, 0x32, 0x00); /* irq off */
129         tda10086_write_byte(state, 0x31, 0x56); /* setup AFC */
130
131         /* setup PLL (this assumes SACLK = 96MHz) */
132         tda10086_write_byte(state, 0x55, 0x2c); /* misc PLL setup */
133         if (state->config->xtal_freq == TDA10086_XTAL_16M) {
134                 tda10086_write_byte(state, 0x3a, 0x0b); /* M=12 */
135                 tda10086_write_byte(state, 0x3b, 0x01); /* P=2 */
136         } else {
137                 tda10086_write_byte(state, 0x3a, 0x17); /* M=24 */
138                 tda10086_write_byte(state, 0x3b, 0x00); /* P=1 */
139         }
140         tda10086_write_mask(state, 0x55, 0x20, 0x00); /* powerup PLL */
141
142         /* setup TS interface */
143         tda10086_write_byte(state, 0x11, 0x81);
144         tda10086_write_byte(state, 0x12, 0x81);
145         tda10086_write_byte(state, 0x19, 0x40); /* parallel mode A + MSBFIRST */
146         tda10086_write_byte(state, 0x56, 0x80); /* powerdown WPLL - unused in the mode we use */
147         tda10086_write_byte(state, 0x57, 0x08); /* bypass WPLL - unused in the mode we use */
148         tda10086_write_byte(state, 0x10, 0x2a);
149
150         /* setup ADC */
151         tda10086_write_byte(state, 0x58, 0x61); /* ADC setup */
152         tda10086_write_mask(state, 0x58, 0x01, 0x00); /* powerup ADC */
153
154         /* setup AGC */
155         tda10086_write_byte(state, 0x05, 0x0B);
156         tda10086_write_byte(state, 0x37, 0x63);
157         tda10086_write_byte(state, 0x3f, 0x0a); /* NOTE: flydvb varies it */
158         tda10086_write_byte(state, 0x40, 0x64);
159         tda10086_write_byte(state, 0x41, 0x4f);
160         tda10086_write_byte(state, 0x42, 0x43);
161
162         /* setup viterbi */
163         tda10086_write_byte(state, 0x1a, 0x11); /* VBER 10^6, DVB, QPSK */
164
165         /* setup carrier recovery */
166         tda10086_write_byte(state, 0x3d, 0x80);
167
168         /* setup SEC */
169         tda10086_write_byte(state, 0x36, t22k_off); /* all SEC off, 22k tone */
170         tda10086_write_byte(state, 0x34, (((1<<19) * (22000/1000)) / (SACLK/1000)));
171         tda10086_write_byte(state, 0x35, (((1<<19) * (22000/1000)) / (SACLK/1000)) >> 8);
172
173         return 0;
174 }
175
176 static void tda10086_diseqc_wait(struct tda10086_state *state)
177 {
178         unsigned long timeout = jiffies + msecs_to_jiffies(200);
179         while (!(tda10086_read_byte(state, 0x50) & 0x01)) {
180                 if(time_after(jiffies, timeout)) {
181                         printk("%s: diseqc queue not ready, command may be lost.\n", __func__);
182                         break;
183                 }
184                 msleep(10);
185         }
186 }
187
188 static int tda10086_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
189 {
190         struct tda10086_state* state = fe->demodulator_priv;
191         u8 t22k_off = 0x80;
192
193         dprintk ("%s\n", __func__);
194
195         if (state->config->diseqc_tone)
196                 t22k_off = 0;
197
198         switch (tone) {
199         case SEC_TONE_OFF:
200                 tda10086_write_byte(state, 0x36, t22k_off);
201                 break;
202
203         case SEC_TONE_ON:
204                 tda10086_write_byte(state, 0x36, 0x01 + t22k_off);
205                 break;
206         }
207
208         return 0;
209 }
210
211 static int tda10086_send_master_cmd (struct dvb_frontend* fe,
212                                     struct dvb_diseqc_master_cmd* cmd)
213 {
214         struct tda10086_state* state = fe->demodulator_priv;
215         int i;
216         u8 oldval;
217         u8 t22k_off = 0x80;
218
219         dprintk ("%s\n", __func__);
220
221         if (state->config->diseqc_tone)
222                 t22k_off = 0;
223
224         if (cmd->msg_len > 6)
225                 return -EINVAL;
226         oldval = tda10086_read_byte(state, 0x36);
227
228         for(i=0; i< cmd->msg_len; i++) {
229                 tda10086_write_byte(state, 0x48+i, cmd->msg[i]);
230         }
231         tda10086_write_byte(state, 0x36, (0x08 + t22k_off)
232                                         | ((cmd->msg_len - 1) << 4));
233
234         tda10086_diseqc_wait(state);
235
236         tda10086_write_byte(state, 0x36, oldval);
237
238         return 0;
239 }
240
241 static int tda10086_send_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd)
242 {
243         struct tda10086_state* state = fe->demodulator_priv;
244         u8 oldval = tda10086_read_byte(state, 0x36);
245         u8 t22k_off = 0x80;
246
247         dprintk ("%s\n", __func__);
248
249         if (state->config->diseqc_tone)
250                 t22k_off = 0;
251
252         switch(minicmd) {
253         case SEC_MINI_A:
254                 tda10086_write_byte(state, 0x36, 0x04 + t22k_off);
255                 break;
256
257         case SEC_MINI_B:
258                 tda10086_write_byte(state, 0x36, 0x06 + t22k_off);
259                 break;
260         }
261
262         tda10086_diseqc_wait(state);
263
264         tda10086_write_byte(state, 0x36, oldval);
265
266         return 0;
267 }
268
269 static int tda10086_set_inversion(struct tda10086_state *state,
270                                   struct dvb_frontend_parameters *fe_params)
271 {
272         u8 invval = 0x80;
273
274         dprintk ("%s %i %i\n", __func__, fe_params->inversion, state->config->invert);
275
276         switch(fe_params->inversion) {
277         case INVERSION_OFF:
278                 if (state->config->invert)
279                         invval = 0x40;
280                 break;
281         case INVERSION_ON:
282                 if (!state->config->invert)
283                         invval = 0x40;
284                 break;
285         case INVERSION_AUTO:
286                 invval = 0x00;
287                 break;
288         }
289         tda10086_write_mask(state, 0x0c, 0xc0, invval);
290
291         return 0;
292 }
293
294 static int tda10086_set_symbol_rate(struct tda10086_state *state,
295                                     struct dvb_frontend_parameters *fe_params)
296 {
297         u8 dfn = 0;
298         u8 afs = 0;
299         u8 byp = 0;
300         u8 reg37 = 0x43;
301         u8 reg42 = 0x43;
302         u64 big;
303         u32 tmp;
304         u32 bdr;
305         u32 bdri;
306         u32 symbol_rate = fe_params->u.qpsk.symbol_rate;
307
308         dprintk ("%s %i\n", __func__, symbol_rate);
309
310         /* setup the decimation and anti-aliasing filters.. */
311         if (symbol_rate < (u32) (SACLK * 0.0137)) {
312                 dfn=4;
313                 afs=1;
314         } else if (symbol_rate < (u32) (SACLK * 0.0208)) {
315                 dfn=4;
316                 afs=0;
317         } else if (symbol_rate < (u32) (SACLK * 0.0270)) {
318                 dfn=3;
319                 afs=1;
320         } else if (symbol_rate < (u32) (SACLK * 0.0416)) {
321                 dfn=3;
322                 afs=0;
323         } else if (symbol_rate < (u32) (SACLK * 0.0550)) {
324                 dfn=2;
325                 afs=1;
326         } else if (symbol_rate < (u32) (SACLK * 0.0833)) {
327                 dfn=2;
328                 afs=0;
329         } else if (symbol_rate < (u32) (SACLK * 0.1100)) {
330                 dfn=1;
331                 afs=1;
332         } else if (symbol_rate < (u32) (SACLK * 0.1666)) {
333                 dfn=1;
334                 afs=0;
335         } else if (symbol_rate < (u32) (SACLK * 0.2200)) {
336                 dfn=0;
337                 afs=1;
338         } else if (symbol_rate < (u32) (SACLK * 0.3333)) {
339                 dfn=0;
340                 afs=0;
341         } else {
342                 reg37 = 0x63;
343                 reg42 = 0x4f;
344                 byp=1;
345         }
346
347         /* calculate BDR */
348         big = (1ULL<<21) * ((u64) symbol_rate/1000ULL) * (1ULL<<dfn);
349         big += ((SACLK/1000ULL)-1ULL);
350         do_div(big, (SACLK/1000ULL));
351         bdr = big & 0xfffff;
352
353         /* calculate BDRI */
354         tmp = (1<<dfn)*(symbol_rate/1000);
355         bdri = ((32 * (SACLK/1000)) + (tmp-1)) / tmp;
356
357         tda10086_write_byte(state, 0x21, (afs << 7) | dfn);
358         tda10086_write_mask(state, 0x20, 0x08, byp << 3);
359         tda10086_write_byte(state, 0x06, bdr);
360         tda10086_write_byte(state, 0x07, bdr >> 8);
361         tda10086_write_byte(state, 0x08, bdr >> 16);
362         tda10086_write_byte(state, 0x09, bdri);
363         tda10086_write_byte(state, 0x37, reg37);
364         tda10086_write_byte(state, 0x42, reg42);
365
366         return 0;
367 }
368
369 static int tda10086_set_fec(struct tda10086_state *state,
370                             struct dvb_frontend_parameters *fe_params)
371 {
372         u8 fecval;
373
374         dprintk ("%s %i\n", __func__, fe_params->u.qpsk.fec_inner);
375
376         switch(fe_params->u.qpsk.fec_inner) {
377         case FEC_1_2:
378                 fecval = 0x00;
379                 break;
380         case FEC_2_3:
381                 fecval = 0x01;
382                 break;
383         case FEC_3_4:
384                 fecval = 0x02;
385                 break;
386         case FEC_4_5:
387                 fecval = 0x03;
388                 break;
389         case FEC_5_6:
390                 fecval = 0x04;
391                 break;
392         case FEC_6_7:
393                 fecval = 0x05;
394                 break;
395         case FEC_7_8:
396                 fecval = 0x06;
397                 break;
398         case FEC_8_9:
399                 fecval = 0x07;
400                 break;
401         case FEC_AUTO:
402                 fecval = 0x08;
403                 break;
404         default:
405                 return -1;
406         }
407         tda10086_write_byte(state, 0x0d, fecval);
408
409         return 0;
410 }
411
412 static int tda10086_set_frontend(struct dvb_frontend* fe,
413                                  struct dvb_frontend_parameters *fe_params)
414 {
415         struct tda10086_state *state = fe->demodulator_priv;
416         int ret;
417         u32 freq = 0;
418         int freqoff;
419
420         dprintk ("%s\n", __func__);
421
422         /* modify parameters for tuning */
423         tda10086_write_byte(state, 0x02, 0x35);
424         state->has_lock = false;
425
426         /* set params */
427         if (fe->ops.tuner_ops.set_params) {
428                 fe->ops.tuner_ops.set_params(fe, fe_params);
429                 if (fe->ops.i2c_gate_ctrl)
430                         fe->ops.i2c_gate_ctrl(fe, 0);
431
432                 if (fe->ops.tuner_ops.get_frequency)
433                         fe->ops.tuner_ops.get_frequency(fe, &freq);
434                 if (fe->ops.i2c_gate_ctrl)
435                         fe->ops.i2c_gate_ctrl(fe, 0);
436         }
437
438         /* calcluate the frequency offset (in *Hz* not kHz) */
439         freqoff = fe_params->frequency - freq;
440         freqoff = ((1<<16) * freqoff) / (SACLK/1000);
441         tda10086_write_byte(state, 0x3d, 0x80 | ((freqoff >> 8) & 0x7f));
442         tda10086_write_byte(state, 0x3e, freqoff);
443
444         if ((ret = tda10086_set_inversion(state, fe_params)) < 0)
445                 return ret;
446         if ((ret = tda10086_set_symbol_rate(state, fe_params)) < 0)
447                 return ret;
448         if ((ret = tda10086_set_fec(state, fe_params)) < 0)
449                 return ret;
450
451         /* soft reset + disable TS output until lock */
452         tda10086_write_mask(state, 0x10, 0x40, 0x40);
453         tda10086_write_mask(state, 0x00, 0x01, 0x00);
454
455         state->symbol_rate = fe_params->u.qpsk.symbol_rate;
456         state->frequency = fe_params->frequency;
457         return 0;
458 }
459
460 static int tda10086_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *fe_params)
461 {
462         struct tda10086_state* state = fe->demodulator_priv;
463         u8 val;
464         int tmp;
465         u64 tmp64;
466
467         dprintk ("%s\n", __func__);
468
469         /* check for invalid symbol rate */
470         if (fe_params->u.qpsk.symbol_rate < 500000)
471                 return -EINVAL;
472
473         /* calculate the updated frequency (note: we convert from Hz->kHz) */
474         tmp64 = tda10086_read_byte(state, 0x52);
475         tmp64 |= (tda10086_read_byte(state, 0x51) << 8);
476         if (tmp64 & 0x8000)
477                 tmp64 |= 0xffffffffffff0000ULL;
478         tmp64 = (tmp64 * (SACLK/1000ULL));
479         do_div(tmp64, (1ULL<<15) * (1ULL<<1));
480         fe_params->frequency = (int) state->frequency + (int) tmp64;
481
482         /* the inversion */
483         val = tda10086_read_byte(state, 0x0c);
484         if (val & 0x80) {
485                 switch(val & 0x40) {
486                 case 0x00:
487                         fe_params->inversion = INVERSION_OFF;
488                         if (state->config->invert)
489                                 fe_params->inversion = INVERSION_ON;
490                         break;
491                 default:
492                         fe_params->inversion = INVERSION_ON;
493                         if (state->config->invert)
494                                 fe_params->inversion = INVERSION_OFF;
495                         break;
496                 }
497         } else {
498                 tda10086_read_byte(state, 0x0f);
499                 switch(val & 0x02) {
500                 case 0x00:
501                         fe_params->inversion = INVERSION_OFF;
502                         if (state->config->invert)
503                                 fe_params->inversion = INVERSION_ON;
504                         break;
505                 default:
506                         fe_params->inversion = INVERSION_ON;
507                         if (state->config->invert)
508                                 fe_params->inversion = INVERSION_OFF;
509                         break;
510                 }
511         }
512
513         /* calculate the updated symbol rate */
514         tmp = tda10086_read_byte(state, 0x1d);
515         if (tmp & 0x80)
516                 tmp |= 0xffffff00;
517         tmp = (tmp * 480 * (1<<1)) / 128;
518         tmp = ((state->symbol_rate/1000) * tmp) / (1000000/1000);
519         fe_params->u.qpsk.symbol_rate = state->symbol_rate + tmp;
520
521         /* the FEC */
522         val = (tda10086_read_byte(state, 0x0d) & 0x70) >> 4;
523         switch(val) {
524         case 0x00:
525                 fe_params->u.qpsk.fec_inner = FEC_1_2;
526                 break;
527         case 0x01:
528                 fe_params->u.qpsk.fec_inner = FEC_2_3;
529                 break;
530         case 0x02:
531                 fe_params->u.qpsk.fec_inner = FEC_3_4;
532                 break;
533         case 0x03:
534                 fe_params->u.qpsk.fec_inner = FEC_4_5;
535                 break;
536         case 0x04:
537                 fe_params->u.qpsk.fec_inner = FEC_5_6;
538                 break;
539         case 0x05:
540                 fe_params->u.qpsk.fec_inner = FEC_6_7;
541                 break;
542         case 0x06:
543                 fe_params->u.qpsk.fec_inner = FEC_7_8;
544                 break;
545         case 0x07:
546                 fe_params->u.qpsk.fec_inner = FEC_8_9;
547                 break;
548         }
549
550         return 0;
551 }
552
553 static int tda10086_read_status(struct dvb_frontend* fe, fe_status_t *fe_status)
554 {
555         struct tda10086_state* state = fe->demodulator_priv;
556         u8 val;
557
558         dprintk ("%s\n", __func__);
559
560         val = tda10086_read_byte(state, 0x0e);
561         *fe_status = 0;
562         if (val & 0x01)
563                 *fe_status |= FE_HAS_SIGNAL;
564         if (val & 0x02)
565                 *fe_status |= FE_HAS_CARRIER;
566         if (val & 0x04)
567                 *fe_status |= FE_HAS_VITERBI;
568         if (val & 0x08)
569                 *fe_status |= FE_HAS_SYNC;
570         if (val & 0x10) {
571                 *fe_status |= FE_HAS_LOCK;
572                 if (!state->has_lock) {
573                         state->has_lock = true;
574                         /* modify parameters for stable reception */
575                         tda10086_write_byte(state, 0x02, 0x00);
576                 }
577         }
578
579         return 0;
580 }
581
582 static int tda10086_read_signal_strength(struct dvb_frontend* fe, u16 * signal)
583 {
584         struct tda10086_state* state = fe->demodulator_priv;
585         u8 _str;
586
587         dprintk ("%s\n", __func__);
588
589         _str = 0xff - tda10086_read_byte(state, 0x43);
590         *signal = (_str << 8) | _str;
591
592         return 0;
593 }
594
595 static int tda10086_read_snr(struct dvb_frontend* fe, u16 * snr)
596 {
597         struct tda10086_state* state = fe->demodulator_priv;
598         u8 _snr;
599
600         dprintk ("%s\n", __func__);
601
602         _snr = 0xff - tda10086_read_byte(state, 0x1c);
603         *snr = (_snr << 8) | _snr;
604
605         return 0;
606 }
607
608 static int tda10086_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
609 {
610         struct tda10086_state* state = fe->demodulator_priv;
611
612         dprintk ("%s\n", __func__);
613
614         /* read it */
615         *ucblocks = tda10086_read_byte(state, 0x18) & 0x7f;
616
617         /* reset counter */
618         tda10086_write_byte(state, 0x18, 0x00);
619         tda10086_write_byte(state, 0x18, 0x80);
620
621         return 0;
622 }
623
624 static int tda10086_read_ber(struct dvb_frontend* fe, u32* ber)
625 {
626         struct tda10086_state* state = fe->demodulator_priv;
627
628         dprintk ("%s\n", __func__);
629
630         /* read it */
631         *ber = 0;
632         *ber |= tda10086_read_byte(state, 0x15);
633         *ber |= tda10086_read_byte(state, 0x16) << 8;
634         *ber |= (tda10086_read_byte(state, 0x17) & 0xf) << 16;
635
636         return 0;
637 }
638
639 static int tda10086_sleep(struct dvb_frontend* fe)
640 {
641         struct tda10086_state* state = fe->demodulator_priv;
642
643         dprintk ("%s\n", __func__);
644
645         tda10086_write_mask(state, 0x00, 0x08, 0x08);
646
647         return 0;
648 }
649
650 static int tda10086_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
651 {
652         struct tda10086_state* state = fe->demodulator_priv;
653
654         dprintk ("%s\n", __func__);
655
656         if (enable) {
657                 tda10086_write_mask(state, 0x00, 0x10, 0x10);
658         } else {
659                 tda10086_write_mask(state, 0x00, 0x10, 0x00);
660         }
661
662         return 0;
663 }
664
665 static int tda10086_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
666 {
667         if (fesettings->parameters.u.qpsk.symbol_rate > 20000000) {
668                 fesettings->min_delay_ms = 50;
669                 fesettings->step_size = 2000;
670                 fesettings->max_drift = 8000;
671         } else if (fesettings->parameters.u.qpsk.symbol_rate > 12000000) {
672                 fesettings->min_delay_ms = 100;
673                 fesettings->step_size = 1500;
674                 fesettings->max_drift = 9000;
675         } else if (fesettings->parameters.u.qpsk.symbol_rate > 8000000) {
676                 fesettings->min_delay_ms = 100;
677                 fesettings->step_size = 1000;
678                 fesettings->max_drift = 8000;
679         } else if (fesettings->parameters.u.qpsk.symbol_rate > 4000000) {
680                 fesettings->min_delay_ms = 100;
681                 fesettings->step_size = 500;
682                 fesettings->max_drift = 7000;
683         } else if (fesettings->parameters.u.qpsk.symbol_rate > 2000000) {
684                 fesettings->min_delay_ms = 200;
685                 fesettings->step_size = (fesettings->parameters.u.qpsk.symbol_rate / 8000);
686                 fesettings->max_drift = 14 * fesettings->step_size;
687         } else {
688                 fesettings->min_delay_ms = 200;
689                 fesettings->step_size = (fesettings->parameters.u.qpsk.symbol_rate / 8000);
690                 fesettings->max_drift = 18 * fesettings->step_size;
691         }
692
693         return 0;
694 }
695
696 static void tda10086_release(struct dvb_frontend* fe)
697 {
698         struct tda10086_state *state = fe->demodulator_priv;
699         tda10086_sleep(fe);
700         kfree(state);
701 }
702
703 static struct dvb_frontend_ops tda10086_ops = {
704
705         .info = {
706                 .name     = "Philips TDA10086 DVB-S",
707                 .type     = FE_QPSK,
708                 .frequency_min    = 950000,
709                 .frequency_max    = 2150000,
710                 .frequency_stepsize = 125,     /* kHz for QPSK frontends */
711                 .symbol_rate_min  = 1000000,
712                 .symbol_rate_max  = 45000000,
713                 .caps = FE_CAN_INVERSION_AUTO |
714                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
715                         FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
716                         FE_CAN_QPSK
717         },
718
719         .release = tda10086_release,
720
721         .init = tda10086_init,
722         .sleep = tda10086_sleep,
723         .i2c_gate_ctrl = tda10086_i2c_gate_ctrl,
724
725         .set_frontend = tda10086_set_frontend,
726         .get_frontend = tda10086_get_frontend,
727         .get_tune_settings = tda10086_get_tune_settings,
728
729         .read_status = tda10086_read_status,
730         .read_ber = tda10086_read_ber,
731         .read_signal_strength = tda10086_read_signal_strength,
732         .read_snr = tda10086_read_snr,
733         .read_ucblocks = tda10086_read_ucblocks,
734
735         .diseqc_send_master_cmd = tda10086_send_master_cmd,
736         .diseqc_send_burst = tda10086_send_burst,
737         .set_tone = tda10086_set_tone,
738 };
739
740 struct dvb_frontend* tda10086_attach(const struct tda10086_config* config,
741                                      struct i2c_adapter* i2c)
742 {
743         struct tda10086_state *state;
744
745         dprintk ("%s\n", __func__);
746
747         /* allocate memory for the internal state */
748         state = kmalloc(sizeof(struct tda10086_state), GFP_KERNEL);
749         if (!state)
750                 return NULL;
751
752         /* setup the state */
753         state->config = config;
754         state->i2c = i2c;
755
756         /* check if the demod is there */
757         if (tda10086_read_byte(state, 0x1e) != 0xe1) {
758                 kfree(state);
759                 return NULL;
760         }
761
762         /* create dvb_frontend */
763         memcpy(&state->frontend.ops, &tda10086_ops, sizeof(struct dvb_frontend_ops));
764         state->frontend.demodulator_priv = state;
765         return &state->frontend;
766 }
767
768 module_param(debug, int, 0644);
769 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
770
771 MODULE_DESCRIPTION("Philips TDA10086 DVB-S Demodulator");
772 MODULE_AUTHOR("Andrew de Quincey");
773 MODULE_LICENSE("GPL");
774
775 EXPORT_SYMBOL(tda10086_attach);