V4L/DVB(7767): Move tuners to common/tuners
[linux-2.6] / drivers / media / common / tuners / tda18271-common.c
1 /*
2     tda18271-common.c - driver for the Philips / NXP TDA18271 silicon tuner
3
4     Copyright (C) 2007, 2008 Michael Krufky <mkrufky@linuxtv.org>
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     GNU General Public License for more details.
15
16     You should have received a copy of the GNU General Public License
17     along with this program; if not, write to the Free Software
18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #include "tda18271-priv.h"
22
23 static int tda18271_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
24 {
25         struct tda18271_priv *priv = fe->tuner_priv;
26         enum tda18271_i2c_gate gate;
27         int ret = 0;
28
29         switch (priv->gate) {
30         case TDA18271_GATE_DIGITAL:
31         case TDA18271_GATE_ANALOG:
32                 gate = priv->gate;
33                 break;
34         case TDA18271_GATE_AUTO:
35         default:
36                 switch (priv->mode) {
37                 case TDA18271_DIGITAL:
38                         gate = TDA18271_GATE_DIGITAL;
39                         break;
40                 case TDA18271_ANALOG:
41                 default:
42                         gate = TDA18271_GATE_ANALOG;
43                         break;
44                 }
45         }
46
47         switch (gate) {
48         case TDA18271_GATE_ANALOG:
49                 if (fe->ops.analog_ops.i2c_gate_ctrl)
50                         ret = fe->ops.analog_ops.i2c_gate_ctrl(fe, enable);
51                 break;
52         case TDA18271_GATE_DIGITAL:
53                 if (fe->ops.i2c_gate_ctrl)
54                         ret = fe->ops.i2c_gate_ctrl(fe, enable);
55                 break;
56         default:
57                 ret = -EINVAL;
58                 break;
59         }
60
61         return ret;
62 };
63
64 /*---------------------------------------------------------------------*/
65
66 static void tda18271_dump_regs(struct dvb_frontend *fe, int extended)
67 {
68         struct tda18271_priv *priv = fe->tuner_priv;
69         unsigned char *regs = priv->tda18271_regs;
70
71         tda_reg("=== TDA18271 REG DUMP ===\n");
72         tda_reg("ID_BYTE            = 0x%02x\n", 0xff & regs[R_ID]);
73         tda_reg("THERMO_BYTE        = 0x%02x\n", 0xff & regs[R_TM]);
74         tda_reg("POWER_LEVEL_BYTE   = 0x%02x\n", 0xff & regs[R_PL]);
75         tda_reg("EASY_PROG_BYTE_1   = 0x%02x\n", 0xff & regs[R_EP1]);
76         tda_reg("EASY_PROG_BYTE_2   = 0x%02x\n", 0xff & regs[R_EP2]);
77         tda_reg("EASY_PROG_BYTE_3   = 0x%02x\n", 0xff & regs[R_EP3]);
78         tda_reg("EASY_PROG_BYTE_4   = 0x%02x\n", 0xff & regs[R_EP4]);
79         tda_reg("EASY_PROG_BYTE_5   = 0x%02x\n", 0xff & regs[R_EP5]);
80         tda_reg("CAL_POST_DIV_BYTE  = 0x%02x\n", 0xff & regs[R_CPD]);
81         tda_reg("CAL_DIV_BYTE_1     = 0x%02x\n", 0xff & regs[R_CD1]);
82         tda_reg("CAL_DIV_BYTE_2     = 0x%02x\n", 0xff & regs[R_CD2]);
83         tda_reg("CAL_DIV_BYTE_3     = 0x%02x\n", 0xff & regs[R_CD3]);
84         tda_reg("MAIN_POST_DIV_BYTE = 0x%02x\n", 0xff & regs[R_MPD]);
85         tda_reg("MAIN_DIV_BYTE_1    = 0x%02x\n", 0xff & regs[R_MD1]);
86         tda_reg("MAIN_DIV_BYTE_2    = 0x%02x\n", 0xff & regs[R_MD2]);
87         tda_reg("MAIN_DIV_BYTE_3    = 0x%02x\n", 0xff & regs[R_MD3]);
88
89         /* only dump extended regs if DBG_ADV is set */
90         if (!(tda18271_debug & DBG_ADV))
91                 return;
92
93         /* W indicates write-only registers.
94          * Register dump for write-only registers shows last value written. */
95
96         tda_reg("EXTENDED_BYTE_1    = 0x%02x\n", 0xff & regs[R_EB1]);
97         tda_reg("EXTENDED_BYTE_2    = 0x%02x\n", 0xff & regs[R_EB2]);
98         tda_reg("EXTENDED_BYTE_3    = 0x%02x\n", 0xff & regs[R_EB3]);
99         tda_reg("EXTENDED_BYTE_4    = 0x%02x\n", 0xff & regs[R_EB4]);
100         tda_reg("EXTENDED_BYTE_5    = 0x%02x\n", 0xff & regs[R_EB5]);
101         tda_reg("EXTENDED_BYTE_6    = 0x%02x\n", 0xff & regs[R_EB6]);
102         tda_reg("EXTENDED_BYTE_7    = 0x%02x\n", 0xff & regs[R_EB7]);
103         tda_reg("EXTENDED_BYTE_8    = 0x%02x\n", 0xff & regs[R_EB8]);
104         tda_reg("EXTENDED_BYTE_9  W = 0x%02x\n", 0xff & regs[R_EB9]);
105         tda_reg("EXTENDED_BYTE_10   = 0x%02x\n", 0xff & regs[R_EB10]);
106         tda_reg("EXTENDED_BYTE_11   = 0x%02x\n", 0xff & regs[R_EB11]);
107         tda_reg("EXTENDED_BYTE_12   = 0x%02x\n", 0xff & regs[R_EB12]);
108         tda_reg("EXTENDED_BYTE_13   = 0x%02x\n", 0xff & regs[R_EB13]);
109         tda_reg("EXTENDED_BYTE_14   = 0x%02x\n", 0xff & regs[R_EB14]);
110         tda_reg("EXTENDED_BYTE_15   = 0x%02x\n", 0xff & regs[R_EB15]);
111         tda_reg("EXTENDED_BYTE_16 W = 0x%02x\n", 0xff & regs[R_EB16]);
112         tda_reg("EXTENDED_BYTE_17 W = 0x%02x\n", 0xff & regs[R_EB17]);
113         tda_reg("EXTENDED_BYTE_18   = 0x%02x\n", 0xff & regs[R_EB18]);
114         tda_reg("EXTENDED_BYTE_19 W = 0x%02x\n", 0xff & regs[R_EB19]);
115         tda_reg("EXTENDED_BYTE_20 W = 0x%02x\n", 0xff & regs[R_EB20]);
116         tda_reg("EXTENDED_BYTE_21   = 0x%02x\n", 0xff & regs[R_EB21]);
117         tda_reg("EXTENDED_BYTE_22   = 0x%02x\n", 0xff & regs[R_EB22]);
118         tda_reg("EXTENDED_BYTE_23   = 0x%02x\n", 0xff & regs[R_EB23]);
119 }
120
121 int tda18271_read_regs(struct dvb_frontend *fe)
122 {
123         struct tda18271_priv *priv = fe->tuner_priv;
124         unsigned char *regs = priv->tda18271_regs;
125         unsigned char buf = 0x00;
126         int ret;
127         struct i2c_msg msg[] = {
128                 { .addr = priv->i2c_props.addr, .flags = 0,
129                   .buf = &buf, .len = 1 },
130                 { .addr = priv->i2c_props.addr, .flags = I2C_M_RD,
131                   .buf = regs, .len = 16 }
132         };
133
134         tda18271_i2c_gate_ctrl(fe, 1);
135
136         /* read all registers */
137         ret = i2c_transfer(priv->i2c_props.adap, msg, 2);
138
139         tda18271_i2c_gate_ctrl(fe, 0);
140
141         if (ret != 2)
142                 tda_err("ERROR: i2c_transfer returned: %d\n", ret);
143
144         if (tda18271_debug & DBG_REG)
145                 tda18271_dump_regs(fe, 0);
146
147         return (ret == 2 ? 0 : ret);
148 }
149
150 int tda18271_read_extended(struct dvb_frontend *fe)
151 {
152         struct tda18271_priv *priv = fe->tuner_priv;
153         unsigned char *regs = priv->tda18271_regs;
154         unsigned char regdump[TDA18271_NUM_REGS];
155         unsigned char buf = 0x00;
156         int ret, i;
157         struct i2c_msg msg[] = {
158                 { .addr = priv->i2c_props.addr, .flags = 0,
159                   .buf = &buf, .len = 1 },
160                 { .addr = priv->i2c_props.addr, .flags = I2C_M_RD,
161                   .buf = regdump, .len = TDA18271_NUM_REGS }
162         };
163
164         tda18271_i2c_gate_ctrl(fe, 1);
165
166         /* read all registers */
167         ret = i2c_transfer(priv->i2c_props.adap, msg, 2);
168
169         tda18271_i2c_gate_ctrl(fe, 0);
170
171         if (ret != 2)
172                 tda_err("ERROR: i2c_transfer returned: %d\n", ret);
173
174         for (i = 0; i < TDA18271_NUM_REGS; i++) {
175                 /* don't update write-only registers */
176                 if ((i != R_EB9)  &&
177                     (i != R_EB16) &&
178                     (i != R_EB17) &&
179                     (i != R_EB19) &&
180                     (i != R_EB20))
181                 regs[i] = regdump[i];
182         }
183
184         if (tda18271_debug & DBG_REG)
185                 tda18271_dump_regs(fe, 1);
186
187         return (ret == 2 ? 0 : ret);
188 }
189
190 int tda18271_write_regs(struct dvb_frontend *fe, int idx, int len)
191 {
192         struct tda18271_priv *priv = fe->tuner_priv;
193         unsigned char *regs = priv->tda18271_regs;
194         unsigned char buf[TDA18271_NUM_REGS + 1];
195         struct i2c_msg msg = { .addr = priv->i2c_props.addr, .flags = 0,
196                                .buf = buf, .len = len + 1 };
197         int i, ret;
198
199         BUG_ON((len == 0) || (idx + len > sizeof(buf)));
200
201         buf[0] = idx;
202         for (i = 1; i <= len; i++)
203                 buf[i] = regs[idx - 1 + i];
204
205         tda18271_i2c_gate_ctrl(fe, 1);
206
207         /* write registers */
208         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
209
210         tda18271_i2c_gate_ctrl(fe, 0);
211
212         if (ret != 1)
213                 tda_err("ERROR: i2c_transfer returned: %d\n", ret);
214
215         return (ret == 1 ? 0 : ret);
216 }
217
218 /*---------------------------------------------------------------------*/
219
220 int tda18271_charge_pump_source(struct dvb_frontend *fe,
221                                 enum tda18271_pll pll, int force)
222 {
223         struct tda18271_priv *priv = fe->tuner_priv;
224         unsigned char *regs = priv->tda18271_regs;
225
226         int r_cp = (pll == TDA18271_CAL_PLL) ? R_EB7 : R_EB4;
227
228         regs[r_cp] &= ~0x20;
229         regs[r_cp] |= ((force & 1) << 5);
230         tda18271_write_regs(fe, r_cp, 1);
231
232         return 0;
233 }
234
235 int tda18271_init_regs(struct dvb_frontend *fe)
236 {
237         struct tda18271_priv *priv = fe->tuner_priv;
238         unsigned char *regs = priv->tda18271_regs;
239
240         tda_dbg("initializing registers for device @ %d-%04x\n",
241                 i2c_adapter_id(priv->i2c_props.adap),
242                 priv->i2c_props.addr);
243
244         /* initialize registers */
245         switch (priv->id) {
246         case TDA18271HDC1:
247                 regs[R_ID]   = 0x83;
248                 break;
249         case TDA18271HDC2:
250                 regs[R_ID]   = 0x84;
251                 break;
252         };
253
254         regs[R_TM]   = 0x08;
255         regs[R_PL]   = 0x80;
256         regs[R_EP1]  = 0xc6;
257         regs[R_EP2]  = 0xdf;
258         regs[R_EP3]  = 0x16;
259         regs[R_EP4]  = 0x60;
260         regs[R_EP5]  = 0x80;
261         regs[R_CPD]  = 0x80;
262         regs[R_CD1]  = 0x00;
263         regs[R_CD2]  = 0x00;
264         regs[R_CD3]  = 0x00;
265         regs[R_MPD]  = 0x00;
266         regs[R_MD1]  = 0x00;
267         regs[R_MD2]  = 0x00;
268         regs[R_MD3]  = 0x00;
269
270         switch (priv->id) {
271         case TDA18271HDC1:
272                 regs[R_EB1]  = 0xff;
273                 break;
274         case TDA18271HDC2:
275                 regs[R_EB1]  = 0xfc;
276                 break;
277         };
278
279         regs[R_EB2]  = 0x01;
280         regs[R_EB3]  = 0x84;
281         regs[R_EB4]  = 0x41;
282         regs[R_EB5]  = 0x01;
283         regs[R_EB6]  = 0x84;
284         regs[R_EB7]  = 0x40;
285         regs[R_EB8]  = 0x07;
286         regs[R_EB9]  = 0x00;
287         regs[R_EB10] = 0x00;
288         regs[R_EB11] = 0x96;
289
290         switch (priv->id) {
291         case TDA18271HDC1:
292                 regs[R_EB12] = 0x0f;
293                 break;
294         case TDA18271HDC2:
295                 regs[R_EB12] = 0x33;
296                 break;
297         };
298
299         regs[R_EB13] = 0xc1;
300         regs[R_EB14] = 0x00;
301         regs[R_EB15] = 0x8f;
302         regs[R_EB16] = 0x00;
303         regs[R_EB17] = 0x00;
304
305         switch (priv->id) {
306         case TDA18271HDC1:
307                 regs[R_EB18] = 0x00;
308                 break;
309         case TDA18271HDC2:
310                 regs[R_EB18] = 0x8c;
311                 break;
312         };
313
314         regs[R_EB19] = 0x00;
315         regs[R_EB20] = 0x20;
316
317         switch (priv->id) {
318         case TDA18271HDC1:
319                 regs[R_EB21] = 0x33;
320                 break;
321         case TDA18271HDC2:
322                 regs[R_EB21] = 0xb3;
323                 break;
324         };
325
326         regs[R_EB22] = 0x48;
327         regs[R_EB23] = 0xb0;
328
329         if (priv->small_i2c) {
330                 tda18271_write_regs(fe, 0x00, 0x10);
331                 tda18271_write_regs(fe, 0x10, 0x10);
332                 tda18271_write_regs(fe, 0x20, 0x07);
333         } else
334                 tda18271_write_regs(fe, 0x00, TDA18271_NUM_REGS);
335
336         /* setup agc1 gain */
337         regs[R_EB17] = 0x00;
338         tda18271_write_regs(fe, R_EB17, 1);
339         regs[R_EB17] = 0x03;
340         tda18271_write_regs(fe, R_EB17, 1);
341         regs[R_EB17] = 0x43;
342         tda18271_write_regs(fe, R_EB17, 1);
343         regs[R_EB17] = 0x4c;
344         tda18271_write_regs(fe, R_EB17, 1);
345
346         /* setup agc2 gain */
347         if ((priv->id) == TDA18271HDC1) {
348                 regs[R_EB20] = 0xa0;
349                 tda18271_write_regs(fe, R_EB20, 1);
350                 regs[R_EB20] = 0xa7;
351                 tda18271_write_regs(fe, R_EB20, 1);
352                 regs[R_EB20] = 0xe7;
353                 tda18271_write_regs(fe, R_EB20, 1);
354                 regs[R_EB20] = 0xec;
355                 tda18271_write_regs(fe, R_EB20, 1);
356         }
357
358         /* image rejection calibration */
359
360         /* low-band */
361         regs[R_EP3] = 0x1f;
362         regs[R_EP4] = 0x66;
363         regs[R_EP5] = 0x81;
364         regs[R_CPD] = 0xcc;
365         regs[R_CD1] = 0x6c;
366         regs[R_CD2] = 0x00;
367         regs[R_CD3] = 0x00;
368         regs[R_MPD] = 0xcd;
369         regs[R_MD1] = 0x77;
370         regs[R_MD2] = 0x08;
371         regs[R_MD3] = 0x00;
372
373         tda18271_write_regs(fe, R_EP3, 11);
374
375         if ((priv->id) == TDA18271HDC2) {
376                 /* main pll cp source on */
377                 tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 1);
378                 msleep(1);
379
380                 /* main pll cp source off */
381                 tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 0);
382         }
383
384         msleep(5); /* pll locking */
385
386         /* launch detector */
387         tda18271_write_regs(fe, R_EP1, 1);
388         msleep(5); /* wanted low measurement */
389
390         regs[R_EP5] = 0x85;
391         regs[R_CPD] = 0xcb;
392         regs[R_CD1] = 0x66;
393         regs[R_CD2] = 0x70;
394
395         tda18271_write_regs(fe, R_EP3, 7);
396         msleep(5); /* pll locking */
397
398         /* launch optimization algorithm */
399         tda18271_write_regs(fe, R_EP2, 1);
400         msleep(30); /* image low optimization completion */
401
402         /* mid-band */
403         regs[R_EP5] = 0x82;
404         regs[R_CPD] = 0xa8;
405         regs[R_CD2] = 0x00;
406         regs[R_MPD] = 0xa9;
407         regs[R_MD1] = 0x73;
408         regs[R_MD2] = 0x1a;
409
410         tda18271_write_regs(fe, R_EP3, 11);
411         msleep(5); /* pll locking */
412
413         /* launch detector */
414         tda18271_write_regs(fe, R_EP1, 1);
415         msleep(5); /* wanted mid measurement */
416
417         regs[R_EP5] = 0x86;
418         regs[R_CPD] = 0xa8;
419         regs[R_CD1] = 0x66;
420         regs[R_CD2] = 0xa0;
421
422         tda18271_write_regs(fe, R_EP3, 7);
423         msleep(5); /* pll locking */
424
425         /* launch optimization algorithm */
426         tda18271_write_regs(fe, R_EP2, 1);
427         msleep(30); /* image mid optimization completion */
428
429         /* high-band */
430         regs[R_EP5] = 0x83;
431         regs[R_CPD] = 0x98;
432         regs[R_CD1] = 0x65;
433         regs[R_CD2] = 0x00;
434         regs[R_MPD] = 0x99;
435         regs[R_MD1] = 0x71;
436         regs[R_MD2] = 0xcd;
437
438         tda18271_write_regs(fe, R_EP3, 11);
439         msleep(5); /* pll locking */
440
441         /* launch detector */
442         tda18271_write_regs(fe, R_EP1, 1);
443         msleep(5); /* wanted high measurement */
444
445         regs[R_EP5] = 0x87;
446         regs[R_CD1] = 0x65;
447         regs[R_CD2] = 0x50;
448
449         tda18271_write_regs(fe, R_EP3, 7);
450         msleep(5); /* pll locking */
451
452         /* launch optimization algorithm */
453         tda18271_write_regs(fe, R_EP2, 1);
454         msleep(30); /* image high optimization completion */
455
456         /* return to normal mode */
457         regs[R_EP4] = 0x64;
458         tda18271_write_regs(fe, R_EP4, 1);
459
460         /* synchronize */
461         tda18271_write_regs(fe, R_EP1, 1);
462
463         return 0;
464 }
465
466 /*---------------------------------------------------------------------*/
467
468 /*
469  *  Standby modes, EP3 [7:5]
470  *
471  *  | SM  || SM_LT || SM_XT || mode description
472  *  |=====\\=======\\=======\\===================================
473  *  |  0  ||   0   ||   0   || normal mode
474  *  |-----||-------||-------||-----------------------------------
475  *  |     ||       ||       || standby mode w/ slave tuner output
476  *  |  1  ||   0   ||   0   || & loop thru & xtal oscillator on
477  *  |-----||-------||-------||-----------------------------------
478  *  |  1  ||   1   ||   0   || standby mode w/ xtal oscillator on
479  *  |-----||-------||-------||-----------------------------------
480  *  |  1  ||   1   ||   1   || power off
481  *
482  */
483
484 int tda18271_set_standby_mode(struct dvb_frontend *fe,
485                               int sm, int sm_lt, int sm_xt)
486 {
487         struct tda18271_priv *priv = fe->tuner_priv;
488         unsigned char *regs = priv->tda18271_regs;
489
490         tda_dbg("sm = %d, sm_lt = %d, sm_xt = %d\n", sm, sm_lt, sm_xt);
491
492         regs[R_EP3]  &= ~0xe0; /* clear sm, sm_lt, sm_xt */
493         regs[R_EP3]  |= sm    ? (1 << 7) : 0 |
494                         sm_lt ? (1 << 6) : 0 |
495                         sm_xt ? (1 << 5) : 0;
496
497         tda18271_write_regs(fe, R_EP3, 1);
498
499         return 0;
500 }
501
502 /*---------------------------------------------------------------------*/
503
504 int tda18271_calc_main_pll(struct dvb_frontend *fe, u32 freq)
505 {
506         /* sets main post divider & divider bytes, but does not write them */
507         struct tda18271_priv *priv = fe->tuner_priv;
508         unsigned char *regs = priv->tda18271_regs;
509         u8 d, pd;
510         u32 div;
511
512         int ret = tda18271_lookup_pll_map(fe, MAIN_PLL, &freq, &pd, &d);
513         if (ret < 0)
514                 goto fail;
515
516         regs[R_MPD]   = (0x77 & pd);
517
518         switch (priv->mode) {
519         case TDA18271_ANALOG:
520                 regs[R_MPD]  &= ~0x08;
521                 break;
522         case TDA18271_DIGITAL:
523                 regs[R_MPD]  |=  0x08;
524                 break;
525         }
526
527         div =  ((d * (freq / 1000)) << 7) / 125;
528
529         regs[R_MD1]   = 0x7f & (div >> 16);
530         regs[R_MD2]   = 0xff & (div >> 8);
531         regs[R_MD3]   = 0xff & div;
532 fail:
533         return ret;
534 }
535
536 int tda18271_calc_cal_pll(struct dvb_frontend *fe, u32 freq)
537 {
538         /* sets cal post divider & divider bytes, but does not write them */
539         struct tda18271_priv *priv = fe->tuner_priv;
540         unsigned char *regs = priv->tda18271_regs;
541         u8 d, pd;
542         u32 div;
543
544         int ret = tda18271_lookup_pll_map(fe, CAL_PLL, &freq, &pd, &d);
545         if (ret < 0)
546                 goto fail;
547
548         regs[R_CPD]   = pd;
549
550         div =  ((d * (freq / 1000)) << 7) / 125;
551
552         regs[R_CD1]   = 0x7f & (div >> 16);
553         regs[R_CD2]   = 0xff & (div >> 8);
554         regs[R_CD3]   = 0xff & div;
555 fail:
556         return ret;
557 }
558
559 /*---------------------------------------------------------------------*/
560
561 int tda18271_calc_bp_filter(struct dvb_frontend *fe, u32 *freq)
562 {
563         /* sets bp filter bits, but does not write them */
564         struct tda18271_priv *priv = fe->tuner_priv;
565         unsigned char *regs = priv->tda18271_regs;
566         u8 val;
567
568         int ret = tda18271_lookup_map(fe, BP_FILTER, freq, &val);
569         if (ret < 0)
570                 goto fail;
571
572         regs[R_EP1]  &= ~0x07; /* clear bp filter bits */
573         regs[R_EP1]  |= (0x07 & val);
574 fail:
575         return ret;
576 }
577
578 int tda18271_calc_km(struct dvb_frontend *fe, u32 *freq)
579 {
580         /* sets K & M bits, but does not write them */
581         struct tda18271_priv *priv = fe->tuner_priv;
582         unsigned char *regs = priv->tda18271_regs;
583         u8 val;
584
585         int ret = tda18271_lookup_map(fe, RF_CAL_KMCO, freq, &val);
586         if (ret < 0)
587                 goto fail;
588
589         regs[R_EB13] &= ~0x7c; /* clear k & m bits */
590         regs[R_EB13] |= (0x7c & val);
591 fail:
592         return ret;
593 }
594
595 int tda18271_calc_rf_band(struct dvb_frontend *fe, u32 *freq)
596 {
597         /* sets rf band bits, but does not write them */
598         struct tda18271_priv *priv = fe->tuner_priv;
599         unsigned char *regs = priv->tda18271_regs;
600         u8 val;
601
602         int ret = tda18271_lookup_map(fe, RF_BAND, freq, &val);
603         if (ret < 0)
604                 goto fail;
605
606         regs[R_EP2]  &= ~0xe0; /* clear rf band bits */
607         regs[R_EP2]  |= (0xe0 & (val << 5));
608 fail:
609         return ret;
610 }
611
612 int tda18271_calc_gain_taper(struct dvb_frontend *fe, u32 *freq)
613 {
614         /* sets gain taper bits, but does not write them */
615         struct tda18271_priv *priv = fe->tuner_priv;
616         unsigned char *regs = priv->tda18271_regs;
617         u8 val;
618
619         int ret = tda18271_lookup_map(fe, GAIN_TAPER, freq, &val);
620         if (ret < 0)
621                 goto fail;
622
623         regs[R_EP2]  &= ~0x1f; /* clear gain taper bits */
624         regs[R_EP2]  |= (0x1f & val);
625 fail:
626         return ret;
627 }
628
629 int tda18271_calc_ir_measure(struct dvb_frontend *fe, u32 *freq)
630 {
631         /* sets IR Meas bits, but does not write them */
632         struct tda18271_priv *priv = fe->tuner_priv;
633         unsigned char *regs = priv->tda18271_regs;
634         u8 val;
635
636         int ret = tda18271_lookup_map(fe, IR_MEASURE, freq, &val);
637         if (ret < 0)
638                 goto fail;
639
640         regs[R_EP5] &= ~0x07;
641         regs[R_EP5] |= (0x07 & val);
642 fail:
643         return ret;
644 }
645
646 int tda18271_calc_rf_cal(struct dvb_frontend *fe, u32 *freq)
647 {
648         /* sets rf cal byte (RFC_Cprog), but does not write it */
649         struct tda18271_priv *priv = fe->tuner_priv;
650         unsigned char *regs = priv->tda18271_regs;
651         u8 val;
652
653         tda18271_lookup_map(fe, RF_CAL, freq, &val);
654
655         regs[R_EB14] = val;
656
657         return 0;
658 }
659
660 /*
661  * Overrides for Emacs so that we follow Linus's tabbing style.
662  * ---------------------------------------------------------------------------
663  * Local variables:
664  * c-basic-offset: 8
665  * End:
666  */