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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
[mirror_ubuntu-artful-kernel.git] / drivers / media / dvb-frontends / cx24123.c
1 /*
2 * Conexant cx24123/cx24109 - DVB QPSK Satellite demod/tuner driver
3 *
4 * Copyright (C) 2005 Steven Toth <stoth@linuxtv.org>
5 *
6 * Support for KWorld DVB-S 100 by Vadim Catana <skystar@moldova.cc>
7 *
8 * Support for CX24123/CX24113-NIM by Patrick Boettcher <pb@linuxtv.org>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 */
20
21 #include <linux/slab.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <asm/div64.h>
26
27 #include "dvb_frontend.h"
28 #include "cx24123.h"
29
30 #define XTAL 10111000
31
32 static int force_band;
33 module_param(force_band, int, 0644);
34 MODULE_PARM_DESC(force_band, "Force a specific band select "\
35 "(1-9, default:off).");
36
37 static int debug;
38 module_param(debug, int, 0644);
39 MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
40
41 #define info(args...) do { printk(KERN_INFO "CX24123: " args); } while (0)
42 #define err(args...) do { printk(KERN_ERR "CX24123: " args); } while (0)
43
44 #define dprintk(args...) \
45 do { \
46 if (debug) { \
47 printk(KERN_DEBUG "CX24123: %s: ", __func__); \
48 printk(args); \
49 } \
50 } while (0)
51
52 struct cx24123_state {
53 struct i2c_adapter *i2c;
54 const struct cx24123_config *config;
55
56 struct dvb_frontend frontend;
57
58 /* Some PLL specifics for tuning */
59 u32 VCAarg;
60 u32 VGAarg;
61 u32 bandselectarg;
62 u32 pllarg;
63 u32 FILTune;
64
65 struct i2c_adapter tuner_i2c_adapter;
66
67 u8 demod_rev;
68
69 /* The Demod/Tuner can't easily provide these, we cache them */
70 u32 currentfreq;
71 u32 currentsymbolrate;
72 };
73
74 /* Various tuner defaults need to be established for a given symbol rate Sps */
75 static struct cx24123_AGC_val {
76 u32 symbolrate_low;
77 u32 symbolrate_high;
78 u32 VCAprogdata;
79 u32 VGAprogdata;
80 u32 FILTune;
81 } cx24123_AGC_vals[] =
82 {
83 {
84 .symbolrate_low = 1000000,
85 .symbolrate_high = 4999999,
86 /* the specs recommend other values for VGA offsets,
87 but tests show they are wrong */
88 .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
89 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x07,
90 .FILTune = 0x27f /* 0.41 V */
91 },
92 {
93 .symbolrate_low = 5000000,
94 .symbolrate_high = 14999999,
95 .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
96 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x1f,
97 .FILTune = 0x317 /* 0.90 V */
98 },
99 {
100 .symbolrate_low = 15000000,
101 .symbolrate_high = 45000000,
102 .VGAprogdata = (1 << 19) | (0x100 << 9) | 0x180,
103 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x3f,
104 .FILTune = 0x145 /* 2.70 V */
105 },
106 };
107
108 /*
109 * Various tuner defaults need to be established for a given frequency kHz.
110 * fixme: The bounds on the bands do not match the doc in real life.
111 * fixme: Some of them have been moved, other might need adjustment.
112 */
113 static struct cx24123_bandselect_val {
114 u32 freq_low;
115 u32 freq_high;
116 u32 VCOdivider;
117 u32 progdata;
118 } cx24123_bandselect_vals[] =
119 {
120 /* band 1 */
121 {
122 .freq_low = 950000,
123 .freq_high = 1074999,
124 .VCOdivider = 4,
125 .progdata = (0 << 19) | (0 << 9) | 0x40,
126 },
127
128 /* band 2 */
129 {
130 .freq_low = 1075000,
131 .freq_high = 1177999,
132 .VCOdivider = 4,
133 .progdata = (0 << 19) | (0 << 9) | 0x80,
134 },
135
136 /* band 3 */
137 {
138 .freq_low = 1178000,
139 .freq_high = 1295999,
140 .VCOdivider = 2,
141 .progdata = (0 << 19) | (1 << 9) | 0x01,
142 },
143
144 /* band 4 */
145 {
146 .freq_low = 1296000,
147 .freq_high = 1431999,
148 .VCOdivider = 2,
149 .progdata = (0 << 19) | (1 << 9) | 0x02,
150 },
151
152 /* band 5 */
153 {
154 .freq_low = 1432000,
155 .freq_high = 1575999,
156 .VCOdivider = 2,
157 .progdata = (0 << 19) | (1 << 9) | 0x04,
158 },
159
160 /* band 6 */
161 {
162 .freq_low = 1576000,
163 .freq_high = 1717999,
164 .VCOdivider = 2,
165 .progdata = (0 << 19) | (1 << 9) | 0x08,
166 },
167
168 /* band 7 */
169 {
170 .freq_low = 1718000,
171 .freq_high = 1855999,
172 .VCOdivider = 2,
173 .progdata = (0 << 19) | (1 << 9) | 0x10,
174 },
175
176 /* band 8 */
177 {
178 .freq_low = 1856000,
179 .freq_high = 2035999,
180 .VCOdivider = 2,
181 .progdata = (0 << 19) | (1 << 9) | 0x20,
182 },
183
184 /* band 9 */
185 {
186 .freq_low = 2036000,
187 .freq_high = 2150000,
188 .VCOdivider = 2,
189 .progdata = (0 << 19) | (1 << 9) | 0x40,
190 },
191 };
192
193 static struct {
194 u8 reg;
195 u8 data;
196 } cx24123_regdata[] =
197 {
198 {0x00, 0x03}, /* Reset system */
199 {0x00, 0x00}, /* Clear reset */
200 {0x03, 0x07}, /* QPSK, DVB, Auto Acquisition (default) */
201 {0x04, 0x10}, /* MPEG */
202 {0x05, 0x04}, /* MPEG */
203 {0x06, 0x31}, /* MPEG (default) */
204 {0x0b, 0x00}, /* Freq search start point (default) */
205 {0x0c, 0x00}, /* Demodulator sample gain (default) */
206 {0x0d, 0x7f}, /* Force driver to shift until the maximum (+-10 MHz) */
207 {0x0e, 0x03}, /* Default non-inverted, FEC 3/4 (default) */
208 {0x0f, 0xfe}, /* FEC search mask (all supported codes) */
209 {0x10, 0x01}, /* Default search inversion, no repeat (default) */
210 {0x16, 0x00}, /* Enable reading of frequency */
211 {0x17, 0x01}, /* Enable EsNO Ready Counter */
212 {0x1c, 0x80}, /* Enable error counter */
213 {0x20, 0x00}, /* Tuner burst clock rate = 500KHz */
214 {0x21, 0x15}, /* Tuner burst mode, word length = 0x15 */
215 {0x28, 0x00}, /* Enable FILTERV with positive pol., DiSEqC 2.x off */
216 {0x29, 0x00}, /* DiSEqC LNB_DC off */
217 {0x2a, 0xb0}, /* DiSEqC Parameters (default) */
218 {0x2b, 0x73}, /* DiSEqC Tone Frequency (default) */
219 {0x2c, 0x00}, /* DiSEqC Message (0x2c - 0x31) */
220 {0x2d, 0x00},
221 {0x2e, 0x00},
222 {0x2f, 0x00},
223 {0x30, 0x00},
224 {0x31, 0x00},
225 {0x32, 0x8c}, /* DiSEqC Parameters (default) */
226 {0x33, 0x00}, /* Interrupts off (0x33 - 0x34) */
227 {0x34, 0x00},
228 {0x35, 0x03}, /* DiSEqC Tone Amplitude (default) */
229 {0x36, 0x02}, /* DiSEqC Parameters (default) */
230 {0x37, 0x3a}, /* DiSEqC Parameters (default) */
231 {0x3a, 0x00}, /* Enable AGC accumulator (for signal strength) */
232 {0x44, 0x00}, /* Constellation (default) */
233 {0x45, 0x00}, /* Symbol count (default) */
234 {0x46, 0x0d}, /* Symbol rate estimator on (default) */
235 {0x56, 0xc1}, /* Error Counter = Viterbi BER */
236 {0x57, 0xff}, /* Error Counter Window (default) */
237 {0x5c, 0x20}, /* Acquisition AFC Expiration window (default is 0x10) */
238 {0x67, 0x83}, /* Non-DCII symbol clock */
239 };
240
241 static int cx24123_i2c_writereg(struct cx24123_state *state,
242 u8 i2c_addr, int reg, int data)
243 {
244 u8 buf[] = { reg, data };
245 struct i2c_msg msg = {
246 .addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
247 };
248 int err;
249
250 /* printk(KERN_DEBUG "wr(%02x): %02x %02x\n", i2c_addr, reg, data); */
251
252 err = i2c_transfer(state->i2c, &msg, 1);
253 if (err != 1) {
254 printk("%s: writereg error(err == %i, reg == 0x%02x, data == 0x%02x)\n",
255 __func__, err, reg, data);
256 return err;
257 }
258
259 return 0;
260 }
261
262 static int cx24123_i2c_readreg(struct cx24123_state *state, u8 i2c_addr, u8 reg)
263 {
264 int ret;
265 u8 b = 0;
266 struct i2c_msg msg[] = {
267 { .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
268 { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &b, .len = 1 }
269 };
270
271 ret = i2c_transfer(state->i2c, msg, 2);
272
273 if (ret != 2) {
274 err("%s: reg=0x%x (error=%d)\n", __func__, reg, ret);
275 return ret;
276 }
277
278 /* printk(KERN_DEBUG "rd(%02x): %02x %02x\n", i2c_addr, reg, b); */
279
280 return b;
281 }
282
283 #define cx24123_readreg(state, reg) \
284 cx24123_i2c_readreg(state, state->config->demod_address, reg)
285 #define cx24123_writereg(state, reg, val) \
286 cx24123_i2c_writereg(state, state->config->demod_address, reg, val)
287
288 static int cx24123_set_inversion(struct cx24123_state *state,
289 enum fe_spectral_inversion inversion)
290 {
291 u8 nom_reg = cx24123_readreg(state, 0x0e);
292 u8 auto_reg = cx24123_readreg(state, 0x10);
293
294 switch (inversion) {
295 case INVERSION_OFF:
296 dprintk("inversion off\n");
297 cx24123_writereg(state, 0x0e, nom_reg & ~0x80);
298 cx24123_writereg(state, 0x10, auto_reg | 0x80);
299 break;
300 case INVERSION_ON:
301 dprintk("inversion on\n");
302 cx24123_writereg(state, 0x0e, nom_reg | 0x80);
303 cx24123_writereg(state, 0x10, auto_reg | 0x80);
304 break;
305 case INVERSION_AUTO:
306 dprintk("inversion auto\n");
307 cx24123_writereg(state, 0x10, auto_reg & ~0x80);
308 break;
309 default:
310 return -EINVAL;
311 }
312
313 return 0;
314 }
315
316 static int cx24123_get_inversion(struct cx24123_state *state,
317 enum fe_spectral_inversion *inversion)
318 {
319 u8 val;
320
321 val = cx24123_readreg(state, 0x1b) >> 7;
322
323 if (val == 0) {
324 dprintk("read inversion off\n");
325 *inversion = INVERSION_OFF;
326 } else {
327 dprintk("read inversion on\n");
328 *inversion = INVERSION_ON;
329 }
330
331 return 0;
332 }
333
334 static int cx24123_set_fec(struct cx24123_state *state, enum fe_code_rate fec)
335 {
336 u8 nom_reg = cx24123_readreg(state, 0x0e) & ~0x07;
337
338 if (((int)fec < FEC_NONE) || (fec > FEC_AUTO))
339 fec = FEC_AUTO;
340
341 /* Set the soft decision threshold */
342 if (fec == FEC_1_2)
343 cx24123_writereg(state, 0x43,
344 cx24123_readreg(state, 0x43) | 0x01);
345 else
346 cx24123_writereg(state, 0x43,
347 cx24123_readreg(state, 0x43) & ~0x01);
348
349 switch (fec) {
350 case FEC_1_2:
351 dprintk("set FEC to 1/2\n");
352 cx24123_writereg(state, 0x0e, nom_reg | 0x01);
353 cx24123_writereg(state, 0x0f, 0x02);
354 break;
355 case FEC_2_3:
356 dprintk("set FEC to 2/3\n");
357 cx24123_writereg(state, 0x0e, nom_reg | 0x02);
358 cx24123_writereg(state, 0x0f, 0x04);
359 break;
360 case FEC_3_4:
361 dprintk("set FEC to 3/4\n");
362 cx24123_writereg(state, 0x0e, nom_reg | 0x03);
363 cx24123_writereg(state, 0x0f, 0x08);
364 break;
365 case FEC_4_5:
366 dprintk("set FEC to 4/5\n");
367 cx24123_writereg(state, 0x0e, nom_reg | 0x04);
368 cx24123_writereg(state, 0x0f, 0x10);
369 break;
370 case FEC_5_6:
371 dprintk("set FEC to 5/6\n");
372 cx24123_writereg(state, 0x0e, nom_reg | 0x05);
373 cx24123_writereg(state, 0x0f, 0x20);
374 break;
375 case FEC_6_7:
376 dprintk("set FEC to 6/7\n");
377 cx24123_writereg(state, 0x0e, nom_reg | 0x06);
378 cx24123_writereg(state, 0x0f, 0x40);
379 break;
380 case FEC_7_8:
381 dprintk("set FEC to 7/8\n");
382 cx24123_writereg(state, 0x0e, nom_reg | 0x07);
383 cx24123_writereg(state, 0x0f, 0x80);
384 break;
385 case FEC_AUTO:
386 dprintk("set FEC to auto\n");
387 cx24123_writereg(state, 0x0f, 0xfe);
388 break;
389 default:
390 return -EOPNOTSUPP;
391 }
392
393 return 0;
394 }
395
396 static int cx24123_get_fec(struct cx24123_state *state, enum fe_code_rate *fec)
397 {
398 int ret;
399
400 ret = cx24123_readreg(state, 0x1b);
401 if (ret < 0)
402 return ret;
403 ret = ret & 0x07;
404
405 switch (ret) {
406 case 1:
407 *fec = FEC_1_2;
408 break;
409 case 2:
410 *fec = FEC_2_3;
411 break;
412 case 3:
413 *fec = FEC_3_4;
414 break;
415 case 4:
416 *fec = FEC_4_5;
417 break;
418 case 5:
419 *fec = FEC_5_6;
420 break;
421 case 6:
422 *fec = FEC_6_7;
423 break;
424 case 7:
425 *fec = FEC_7_8;
426 break;
427 default:
428 /* this can happen when there's no lock */
429 *fec = FEC_NONE;
430 }
431
432 return 0;
433 }
434
435 /* Approximation of closest integer of log2(a/b). It actually gives the
436 lowest integer i such that 2^i >= round(a/b) */
437 static u32 cx24123_int_log2(u32 a, u32 b)
438 {
439 u32 exp, nearest = 0;
440 u32 div = a / b;
441 if (a % b >= b / 2)
442 ++div;
443 if (div < (1 << 31)) {
444 for (exp = 1; div > exp; nearest++)
445 exp += exp;
446 }
447 return nearest;
448 }
449
450 static int cx24123_set_symbolrate(struct cx24123_state *state, u32 srate)
451 {
452 u64 tmp;
453 u32 sample_rate, ratio, sample_gain;
454 u8 pll_mult;
455
456 /* check if symbol rate is within limits */
457 if ((srate > state->frontend.ops.info.symbol_rate_max) ||
458 (srate < state->frontend.ops.info.symbol_rate_min))
459 return -EOPNOTSUPP;
460
461 /* choose the sampling rate high enough for the required operation,
462 while optimizing the power consumed by the demodulator */
463 if (srate < (XTAL*2)/2)
464 pll_mult = 2;
465 else if (srate < (XTAL*3)/2)
466 pll_mult = 3;
467 else if (srate < (XTAL*4)/2)
468 pll_mult = 4;
469 else if (srate < (XTAL*5)/2)
470 pll_mult = 5;
471 else if (srate < (XTAL*6)/2)
472 pll_mult = 6;
473 else if (srate < (XTAL*7)/2)
474 pll_mult = 7;
475 else if (srate < (XTAL*8)/2)
476 pll_mult = 8;
477 else
478 pll_mult = 9;
479
480
481 sample_rate = pll_mult * XTAL;
482
483 /* SYSSymbolRate[21:0] = (srate << 23) / sample_rate */
484
485 tmp = ((u64)srate) << 23;
486 do_div(tmp, sample_rate);
487 ratio = (u32) tmp;
488
489 cx24123_writereg(state, 0x01, pll_mult * 6);
490
491 cx24123_writereg(state, 0x08, (ratio >> 16) & 0x3f);
492 cx24123_writereg(state, 0x09, (ratio >> 8) & 0xff);
493 cx24123_writereg(state, 0x0a, ratio & 0xff);
494
495 /* also set the demodulator sample gain */
496 sample_gain = cx24123_int_log2(sample_rate, srate);
497 tmp = cx24123_readreg(state, 0x0c) & ~0xe0;
498 cx24123_writereg(state, 0x0c, tmp | sample_gain << 5);
499
500 dprintk("srate=%d, ratio=0x%08x, sample_rate=%i sample_gain=%d\n",
501 srate, ratio, sample_rate, sample_gain);
502
503 return 0;
504 }
505
506 /*
507 * Based on the required frequency and symbolrate, the tuner AGC has
508 * to be configured and the correct band selected.
509 * Calculate those values.
510 */
511 static int cx24123_pll_calculate(struct dvb_frontend *fe)
512 {
513 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
514 struct cx24123_state *state = fe->demodulator_priv;
515 u32 ndiv = 0, adiv = 0, vco_div = 0;
516 int i = 0;
517 int pump = 2;
518 int band = 0;
519 int num_bands = ARRAY_SIZE(cx24123_bandselect_vals);
520 struct cx24123_bandselect_val *bsv = NULL;
521 struct cx24123_AGC_val *agcv = NULL;
522
523 /* Defaults for low freq, low rate */
524 state->VCAarg = cx24123_AGC_vals[0].VCAprogdata;
525 state->VGAarg = cx24123_AGC_vals[0].VGAprogdata;
526 state->bandselectarg = cx24123_bandselect_vals[0].progdata;
527 vco_div = cx24123_bandselect_vals[0].VCOdivider;
528
529 /* For the given symbol rate, determine the VCA, VGA and
530 * FILTUNE programming bits */
531 for (i = 0; i < ARRAY_SIZE(cx24123_AGC_vals); i++) {
532 agcv = &cx24123_AGC_vals[i];
533 if ((agcv->symbolrate_low <= p->symbol_rate) &&
534 (agcv->symbolrate_high >= p->symbol_rate)) {
535 state->VCAarg = agcv->VCAprogdata;
536 state->VGAarg = agcv->VGAprogdata;
537 state->FILTune = agcv->FILTune;
538 }
539 }
540
541 /* determine the band to use */
542 if (force_band < 1 || force_band > num_bands) {
543 for (i = 0; i < num_bands; i++) {
544 bsv = &cx24123_bandselect_vals[i];
545 if ((bsv->freq_low <= p->frequency) &&
546 (bsv->freq_high >= p->frequency))
547 band = i;
548 }
549 } else
550 band = force_band - 1;
551
552 state->bandselectarg = cx24123_bandselect_vals[band].progdata;
553 vco_div = cx24123_bandselect_vals[band].VCOdivider;
554
555 /* determine the charge pump current */
556 if (p->frequency < (cx24123_bandselect_vals[band].freq_low +
557 cx24123_bandselect_vals[band].freq_high) / 2)
558 pump = 0x01;
559 else
560 pump = 0x02;
561
562 /* Determine the N/A dividers for the requested lband freq (in kHz). */
563 /* Note: the reference divider R=10, frequency is in KHz,
564 * XTAL is in Hz */
565 ndiv = (((p->frequency * vco_div * 10) /
566 (2 * XTAL / 1000)) / 32) & 0x1ff;
567 adiv = (((p->frequency * vco_div * 10) /
568 (2 * XTAL / 1000)) % 32) & 0x1f;
569
570 if (adiv == 0 && ndiv > 0)
571 ndiv--;
572
573 /* control bits 11, refdiv 11, charge pump polarity 1,
574 * charge pump current, ndiv, adiv */
575 state->pllarg = (3 << 19) | (3 << 17) | (1 << 16) |
576 (pump << 14) | (ndiv << 5) | adiv;
577
578 return 0;
579 }
580
581 /*
582 * Tuner data is 21 bits long, must be left-aligned in data.
583 * Tuner cx24109 is written through a dedicated 3wire interface
584 * on the demod chip.
585 */
586 static int cx24123_pll_writereg(struct dvb_frontend *fe, u32 data)
587 {
588 struct cx24123_state *state = fe->demodulator_priv;
589 unsigned long timeout;
590
591 dprintk("pll writereg called, data=0x%08x\n", data);
592
593 /* align the 21 bytes into to bit23 boundary */
594 data = data << 3;
595
596 /* Reset the demod pll word length to 0x15 bits */
597 cx24123_writereg(state, 0x21, 0x15);
598
599 /* write the msb 8 bits, wait for the send to be completed */
600 timeout = jiffies + msecs_to_jiffies(40);
601 cx24123_writereg(state, 0x22, (data >> 16) & 0xff);
602 while ((cx24123_readreg(state, 0x20) & 0x40) == 0) {
603 if (time_after(jiffies, timeout)) {
604 err("%s: demodulator is not responding, "\
605 "possibly hung, aborting.\n", __func__);
606 return -EREMOTEIO;
607 }
608 msleep(10);
609 }
610
611 /* send another 8 bytes, wait for the send to be completed */
612 timeout = jiffies + msecs_to_jiffies(40);
613 cx24123_writereg(state, 0x22, (data >> 8) & 0xff);
614 while ((cx24123_readreg(state, 0x20) & 0x40) == 0) {
615 if (time_after(jiffies, timeout)) {
616 err("%s: demodulator is not responding, "\
617 "possibly hung, aborting.\n", __func__);
618 return -EREMOTEIO;
619 }
620 msleep(10);
621 }
622
623 /* send the lower 5 bits of this byte, padded with 3 LBB,
624 * wait for the send to be completed */
625 timeout = jiffies + msecs_to_jiffies(40);
626 cx24123_writereg(state, 0x22, (data) & 0xff);
627 while ((cx24123_readreg(state, 0x20) & 0x80)) {
628 if (time_after(jiffies, timeout)) {
629 err("%s: demodulator is not responding," \
630 "possibly hung, aborting.\n", __func__);
631 return -EREMOTEIO;
632 }
633 msleep(10);
634 }
635
636 /* Trigger the demod to configure the tuner */
637 cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) | 2);
638 cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) & 0xfd);
639
640 return 0;
641 }
642
643 static int cx24123_pll_tune(struct dvb_frontend *fe)
644 {
645 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
646 struct cx24123_state *state = fe->demodulator_priv;
647 u8 val;
648
649 dprintk("frequency=%i\n", p->frequency);
650
651 if (cx24123_pll_calculate(fe) != 0) {
652 err("%s: cx24123_pll_calculate failed\n", __func__);
653 return -EINVAL;
654 }
655
656 /* Write the new VCO/VGA */
657 cx24123_pll_writereg(fe, state->VCAarg);
658 cx24123_pll_writereg(fe, state->VGAarg);
659
660 /* Write the new bandselect and pll args */
661 cx24123_pll_writereg(fe, state->bandselectarg);
662 cx24123_pll_writereg(fe, state->pllarg);
663
664 /* set the FILTUNE voltage */
665 val = cx24123_readreg(state, 0x28) & ~0x3;
666 cx24123_writereg(state, 0x27, state->FILTune >> 2);
667 cx24123_writereg(state, 0x28, val | (state->FILTune & 0x3));
668
669 dprintk("pll tune VCA=%d, band=%d, pll=%d\n", state->VCAarg,
670 state->bandselectarg, state->pllarg);
671
672 return 0;
673 }
674
675
676 /*
677 * 0x23:
678 * [7:7] = BTI enabled
679 * [6:6] = I2C repeater enabled
680 * [5:5] = I2C repeater start
681 * [0:0] = BTI start
682 */
683
684 /* mode == 1 -> i2c-repeater, 0 -> bti */
685 static int cx24123_repeater_mode(struct cx24123_state *state, u8 mode, u8 start)
686 {
687 u8 r = cx24123_readreg(state, 0x23) & 0x1e;
688 if (mode)
689 r |= (1 << 6) | (start << 5);
690 else
691 r |= (1 << 7) | (start);
692 return cx24123_writereg(state, 0x23, r);
693 }
694
695 static int cx24123_initfe(struct dvb_frontend *fe)
696 {
697 struct cx24123_state *state = fe->demodulator_priv;
698 int i;
699
700 dprintk("init frontend\n");
701
702 /* Configure the demod to a good set of defaults */
703 for (i = 0; i < ARRAY_SIZE(cx24123_regdata); i++)
704 cx24123_writereg(state, cx24123_regdata[i].reg,
705 cx24123_regdata[i].data);
706
707 /* Set the LNB polarity */
708 if (state->config->lnb_polarity)
709 cx24123_writereg(state, 0x32,
710 cx24123_readreg(state, 0x32) | 0x02);
711
712 if (state->config->dont_use_pll)
713 cx24123_repeater_mode(state, 1, 0);
714
715 return 0;
716 }
717
718 static int cx24123_set_voltage(struct dvb_frontend *fe,
719 enum fe_sec_voltage voltage)
720 {
721 struct cx24123_state *state = fe->demodulator_priv;
722 u8 val;
723
724 val = cx24123_readreg(state, 0x29) & ~0x40;
725
726 switch (voltage) {
727 case SEC_VOLTAGE_13:
728 dprintk("setting voltage 13V\n");
729 return cx24123_writereg(state, 0x29, val & 0x7f);
730 case SEC_VOLTAGE_18:
731 dprintk("setting voltage 18V\n");
732 return cx24123_writereg(state, 0x29, val | 0x80);
733 case SEC_VOLTAGE_OFF:
734 /* already handled in cx88-dvb */
735 return 0;
736 default:
737 return -EINVAL;
738 }
739
740 return 0;
741 }
742
743 /* wait for diseqc queue to become ready (or timeout) */
744 static void cx24123_wait_for_diseqc(struct cx24123_state *state)
745 {
746 unsigned long timeout = jiffies + msecs_to_jiffies(200);
747 while (!(cx24123_readreg(state, 0x29) & 0x40)) {
748 if (time_after(jiffies, timeout)) {
749 err("%s: diseqc queue not ready, " \
750 "command may be lost.\n", __func__);
751 break;
752 }
753 msleep(10);
754 }
755 }
756
757 static int cx24123_send_diseqc_msg(struct dvb_frontend *fe,
758 struct dvb_diseqc_master_cmd *cmd)
759 {
760 struct cx24123_state *state = fe->demodulator_priv;
761 int i, val, tone;
762
763 dprintk("\n");
764
765 /* stop continuous tone if enabled */
766 tone = cx24123_readreg(state, 0x29);
767 if (tone & 0x10)
768 cx24123_writereg(state, 0x29, tone & ~0x50);
769
770 /* wait for diseqc queue ready */
771 cx24123_wait_for_diseqc(state);
772
773 /* select tone mode */
774 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xfb);
775
776 for (i = 0; i < cmd->msg_len; i++)
777 cx24123_writereg(state, 0x2C + i, cmd->msg[i]);
778
779 val = cx24123_readreg(state, 0x29);
780 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40) |
781 ((cmd->msg_len-3) & 3));
782
783 /* wait for diseqc message to finish sending */
784 cx24123_wait_for_diseqc(state);
785
786 /* restart continuous tone if enabled */
787 if (tone & 0x10)
788 cx24123_writereg(state, 0x29, tone & ~0x40);
789
790 return 0;
791 }
792
793 static int cx24123_diseqc_send_burst(struct dvb_frontend *fe,
794 enum fe_sec_mini_cmd burst)
795 {
796 struct cx24123_state *state = fe->demodulator_priv;
797 int val, tone;
798
799 dprintk("\n");
800
801 /* stop continuous tone if enabled */
802 tone = cx24123_readreg(state, 0x29);
803 if (tone & 0x10)
804 cx24123_writereg(state, 0x29, tone & ~0x50);
805
806 /* wait for diseqc queue ready */
807 cx24123_wait_for_diseqc(state);
808
809 /* select tone mode */
810 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) | 0x4);
811 msleep(30);
812 val = cx24123_readreg(state, 0x29);
813 if (burst == SEC_MINI_A)
814 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x00));
815 else if (burst == SEC_MINI_B)
816 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x08));
817 else
818 return -EINVAL;
819
820 cx24123_wait_for_diseqc(state);
821 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xfb);
822
823 /* restart continuous tone if enabled */
824 if (tone & 0x10)
825 cx24123_writereg(state, 0x29, tone & ~0x40);
826
827 return 0;
828 }
829
830 static int cx24123_read_status(struct dvb_frontend *fe, enum fe_status *status)
831 {
832 struct cx24123_state *state = fe->demodulator_priv;
833 int sync = cx24123_readreg(state, 0x14);
834
835 *status = 0;
836 if (state->config->dont_use_pll) {
837 u32 tun_status = 0;
838 if (fe->ops.tuner_ops.get_status)
839 fe->ops.tuner_ops.get_status(fe, &tun_status);
840 if (tun_status & TUNER_STATUS_LOCKED)
841 *status |= FE_HAS_SIGNAL;
842 } else {
843 int lock = cx24123_readreg(state, 0x20);
844 if (lock & 0x01)
845 *status |= FE_HAS_SIGNAL;
846 }
847
848 if (sync & 0x02)
849 *status |= FE_HAS_CARRIER; /* Phase locked */
850 if (sync & 0x04)
851 *status |= FE_HAS_VITERBI;
852
853 /* Reed-Solomon Status */
854 if (sync & 0x08)
855 *status |= FE_HAS_SYNC;
856 if (sync & 0x80)
857 *status |= FE_HAS_LOCK; /*Full Sync */
858
859 return 0;
860 }
861
862 /*
863 * Configured to return the measurement of errors in blocks,
864 * because no UCBLOCKS value is available, so this value doubles up
865 * to satisfy both measurements.
866 */
867 static int cx24123_read_ber(struct dvb_frontend *fe, u32 *ber)
868 {
869 struct cx24123_state *state = fe->demodulator_priv;
870
871 /* The true bit error rate is this value divided by
872 the window size (set as 256 * 255) */
873 *ber = ((cx24123_readreg(state, 0x1c) & 0x3f) << 16) |
874 (cx24123_readreg(state, 0x1d) << 8 |
875 cx24123_readreg(state, 0x1e));
876
877 dprintk("BER = %d\n", *ber);
878
879 return 0;
880 }
881
882 static int cx24123_read_signal_strength(struct dvb_frontend *fe,
883 u16 *signal_strength)
884 {
885 struct cx24123_state *state = fe->demodulator_priv;
886
887 /* larger = better */
888 *signal_strength = cx24123_readreg(state, 0x3b) << 8;
889
890 dprintk("Signal strength = %d\n", *signal_strength);
891
892 return 0;
893 }
894
895 static int cx24123_read_snr(struct dvb_frontend *fe, u16 *snr)
896 {
897 struct cx24123_state *state = fe->demodulator_priv;
898
899 /* Inverted raw Es/N0 count, totally bogus but better than the
900 BER threshold. */
901 *snr = 65535 - (((u16)cx24123_readreg(state, 0x18) << 8) |
902 (u16)cx24123_readreg(state, 0x19));
903
904 dprintk("read S/N index = %d\n", *snr);
905
906 return 0;
907 }
908
909 static int cx24123_set_frontend(struct dvb_frontend *fe)
910 {
911 struct cx24123_state *state = fe->demodulator_priv;
912 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
913
914 dprintk("\n");
915
916 if (state->config->set_ts_params)
917 state->config->set_ts_params(fe, 0);
918
919 state->currentfreq = p->frequency;
920 state->currentsymbolrate = p->symbol_rate;
921
922 cx24123_set_inversion(state, p->inversion);
923 cx24123_set_fec(state, p->fec_inner);
924 cx24123_set_symbolrate(state, p->symbol_rate);
925
926 if (!state->config->dont_use_pll)
927 cx24123_pll_tune(fe);
928 else if (fe->ops.tuner_ops.set_params)
929 fe->ops.tuner_ops.set_params(fe);
930 else
931 err("it seems I don't have a tuner...");
932
933 /* Enable automatic acquisition and reset cycle */
934 cx24123_writereg(state, 0x03, (cx24123_readreg(state, 0x03) | 0x07));
935 cx24123_writereg(state, 0x00, 0x10);
936 cx24123_writereg(state, 0x00, 0);
937
938 if (state->config->agc_callback)
939 state->config->agc_callback(fe);
940
941 return 0;
942 }
943
944 static int cx24123_get_frontend(struct dvb_frontend *fe,
945 struct dtv_frontend_properties *p)
946 {
947 struct cx24123_state *state = fe->demodulator_priv;
948
949 dprintk("\n");
950
951 if (cx24123_get_inversion(state, &p->inversion) != 0) {
952 err("%s: Failed to get inversion status\n", __func__);
953 return -EREMOTEIO;
954 }
955 if (cx24123_get_fec(state, &p->fec_inner) != 0) {
956 err("%s: Failed to get fec status\n", __func__);
957 return -EREMOTEIO;
958 }
959 p->frequency = state->currentfreq;
960 p->symbol_rate = state->currentsymbolrate;
961
962 return 0;
963 }
964
965 static int cx24123_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
966 {
967 struct cx24123_state *state = fe->demodulator_priv;
968 u8 val;
969
970 /* wait for diseqc queue ready */
971 cx24123_wait_for_diseqc(state);
972
973 val = cx24123_readreg(state, 0x29) & ~0x40;
974
975 switch (tone) {
976 case SEC_TONE_ON:
977 dprintk("setting tone on\n");
978 return cx24123_writereg(state, 0x29, val | 0x10);
979 case SEC_TONE_OFF:
980 dprintk("setting tone off\n");
981 return cx24123_writereg(state, 0x29, val & 0xef);
982 default:
983 err("CASE reached default with tone=%d\n", tone);
984 return -EINVAL;
985 }
986
987 return 0;
988 }
989
990 static int cx24123_tune(struct dvb_frontend *fe,
991 bool re_tune,
992 unsigned int mode_flags,
993 unsigned int *delay,
994 enum fe_status *status)
995 {
996 int retval = 0;
997
998 if (re_tune)
999 retval = cx24123_set_frontend(fe);
1000
1001 if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
1002 cx24123_read_status(fe, status);
1003 *delay = HZ/10;
1004
1005 return retval;
1006 }
1007
1008 static int cx24123_get_algo(struct dvb_frontend *fe)
1009 {
1010 return DVBFE_ALGO_HW;
1011 }
1012
1013 static void cx24123_release(struct dvb_frontend *fe)
1014 {
1015 struct cx24123_state *state = fe->demodulator_priv;
1016 dprintk("\n");
1017 i2c_del_adapter(&state->tuner_i2c_adapter);
1018 kfree(state);
1019 }
1020
1021 static int cx24123_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap,
1022 struct i2c_msg msg[], int num)
1023 {
1024 struct cx24123_state *state = i2c_get_adapdata(i2c_adap);
1025 /* this repeater closes after the first stop */
1026 cx24123_repeater_mode(state, 1, 1);
1027 return i2c_transfer(state->i2c, msg, num);
1028 }
1029
1030 static u32 cx24123_tuner_i2c_func(struct i2c_adapter *adapter)
1031 {
1032 return I2C_FUNC_I2C;
1033 }
1034
1035 static struct i2c_algorithm cx24123_tuner_i2c_algo = {
1036 .master_xfer = cx24123_tuner_i2c_tuner_xfer,
1037 .functionality = cx24123_tuner_i2c_func,
1038 };
1039
1040 struct i2c_adapter *
1041 cx24123_get_tuner_i2c_adapter(struct dvb_frontend *fe)
1042 {
1043 struct cx24123_state *state = fe->demodulator_priv;
1044 return &state->tuner_i2c_adapter;
1045 }
1046 EXPORT_SYMBOL(cx24123_get_tuner_i2c_adapter);
1047
1048 static const struct dvb_frontend_ops cx24123_ops;
1049
1050 struct dvb_frontend *cx24123_attach(const struct cx24123_config *config,
1051 struct i2c_adapter *i2c)
1052 {
1053 /* allocate memory for the internal state */
1054 struct cx24123_state *state =
1055 kzalloc(sizeof(struct cx24123_state), GFP_KERNEL);
1056
1057 dprintk("\n");
1058 if (state == NULL) {
1059 err("Unable to kzalloc\n");
1060 goto error;
1061 }
1062
1063 /* setup the state */
1064 state->config = config;
1065 state->i2c = i2c;
1066
1067 /* check if the demod is there */
1068 state->demod_rev = cx24123_readreg(state, 0x00);
1069 switch (state->demod_rev) {
1070 case 0xe1:
1071 info("detected CX24123C\n");
1072 break;
1073 case 0xd1:
1074 info("detected CX24123\n");
1075 break;
1076 default:
1077 err("wrong demod revision: %x\n", state->demod_rev);
1078 goto error;
1079 }
1080
1081 /* create dvb_frontend */
1082 memcpy(&state->frontend.ops, &cx24123_ops,
1083 sizeof(struct dvb_frontend_ops));
1084 state->frontend.demodulator_priv = state;
1085
1086 /* create tuner i2c adapter */
1087 if (config->dont_use_pll)
1088 cx24123_repeater_mode(state, 1, 0);
1089
1090 strlcpy(state->tuner_i2c_adapter.name, "CX24123 tuner I2C bus",
1091 sizeof(state->tuner_i2c_adapter.name));
1092 state->tuner_i2c_adapter.algo = &cx24123_tuner_i2c_algo;
1093 state->tuner_i2c_adapter.algo_data = NULL;
1094 state->tuner_i2c_adapter.dev.parent = i2c->dev.parent;
1095 i2c_set_adapdata(&state->tuner_i2c_adapter, state);
1096 if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) {
1097 err("tuner i2c bus could not be initialized\n");
1098 goto error;
1099 }
1100
1101 return &state->frontend;
1102
1103 error:
1104 kfree(state);
1105
1106 return NULL;
1107 }
1108 EXPORT_SYMBOL(cx24123_attach);
1109
1110 static const struct dvb_frontend_ops cx24123_ops = {
1111 .delsys = { SYS_DVBS },
1112 .info = {
1113 .name = "Conexant CX24123/CX24109",
1114 .frequency_min = 950000,
1115 .frequency_max = 2150000,
1116 .frequency_stepsize = 1011, /* kHz for QPSK frontends */
1117 .frequency_tolerance = 5000,
1118 .symbol_rate_min = 1000000,
1119 .symbol_rate_max = 45000000,
1120 .caps = FE_CAN_INVERSION_AUTO |
1121 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1122 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
1123 FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1124 FE_CAN_QPSK | FE_CAN_RECOVER
1125 },
1126
1127 .release = cx24123_release,
1128
1129 .init = cx24123_initfe,
1130 .set_frontend = cx24123_set_frontend,
1131 .get_frontend = cx24123_get_frontend,
1132 .read_status = cx24123_read_status,
1133 .read_ber = cx24123_read_ber,
1134 .read_signal_strength = cx24123_read_signal_strength,
1135 .read_snr = cx24123_read_snr,
1136 .diseqc_send_master_cmd = cx24123_send_diseqc_msg,
1137 .diseqc_send_burst = cx24123_diseqc_send_burst,
1138 .set_tone = cx24123_set_tone,
1139 .set_voltage = cx24123_set_voltage,
1140 .tune = cx24123_tune,
1141 .get_frontend_algo = cx24123_get_algo,
1142 };
1143
1144 MODULE_DESCRIPTION("DVB Frontend module for Conexant " \
1145 "CX24123/CX24109/CX24113 hardware");
1146 MODULE_AUTHOR("Steven Toth");
1147 MODULE_LICENSE("GPL");
1148
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