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6#include <linux/init.h>
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/string.h>
10#include <linux/slab.h>
11#include <linux/jiffies.h>
12#include <asm/div64.h>
13
14#include <media/dvb_frontend.h>
15#include "si21xx.h"
16
17#define REVISION_REG 0x00
18#define SYSTEM_MODE_REG 0x01
19#define TS_CTRL_REG_1 0x02
20#define TS_CTRL_REG_2 0x03
21#define PIN_CTRL_REG_1 0x04
22#define PIN_CTRL_REG_2 0x05
23#define LOCK_STATUS_REG_1 0x0f
24#define LOCK_STATUS_REG_2 0x10
25#define ACQ_STATUS_REG 0x11
26#define ACQ_CTRL_REG_1 0x13
27#define ACQ_CTRL_REG_2 0x14
28#define PLL_DIVISOR_REG 0x15
29#define COARSE_TUNE_REG 0x16
30#define FINE_TUNE_REG_L 0x17
31#define FINE_TUNE_REG_H 0x18
32
33#define ANALOG_AGC_POWER_LEVEL_REG 0x28
34#define CFO_ESTIMATOR_CTRL_REG_1 0x29
35#define CFO_ESTIMATOR_CTRL_REG_2 0x2a
36#define CFO_ESTIMATOR_CTRL_REG_3 0x2b
37
38#define SYM_RATE_ESTIMATE_REG_L 0x31
39#define SYM_RATE_ESTIMATE_REG_M 0x32
40#define SYM_RATE_ESTIMATE_REG_H 0x33
41
42#define CFO_ESTIMATOR_OFFSET_REG_L 0x36
43#define CFO_ESTIMATOR_OFFSET_REG_H 0x37
44#define CFO_ERROR_REG_L 0x38
45#define CFO_ERROR_REG_H 0x39
46#define SYM_RATE_ESTIMATOR_CTRL_REG 0x3a
47
48#define SYM_RATE_REG_L 0x3f
49#define SYM_RATE_REG_M 0x40
50#define SYM_RATE_REG_H 0x41
51#define SYM_RATE_ESTIMATOR_MAXIMUM_REG 0x42
52#define SYM_RATE_ESTIMATOR_MINIMUM_REG 0x43
53
54#define C_N_ESTIMATOR_CTRL_REG 0x7c
55#define C_N_ESTIMATOR_THRSHLD_REG 0x7d
56#define C_N_ESTIMATOR_LEVEL_REG_L 0x7e
57#define C_N_ESTIMATOR_LEVEL_REG_H 0x7f
58
59#define BLIND_SCAN_CTRL_REG 0x80
60
61#define LSA_CTRL_REG_1 0x8D
62#define SPCTRM_TILT_CORR_THRSHLD_REG 0x8f
63#define ONE_DB_BNDWDTH_THRSHLD_REG 0x90
64#define TWO_DB_BNDWDTH_THRSHLD_REG 0x91
65#define THREE_DB_BNDWDTH_THRSHLD_REG 0x92
66#define INBAND_POWER_THRSHLD_REG 0x93
67#define REF_NOISE_LVL_MRGN_THRSHLD_REG 0x94
68
69#define VIT_SRCH_CTRL_REG_1 0xa0
70#define VIT_SRCH_CTRL_REG_2 0xa1
71#define VIT_SRCH_CTRL_REG_3 0xa2
72#define VIT_SRCH_STATUS_REG 0xa3
73#define VITERBI_BER_COUNT_REG_L 0xab
74#define REED_SOLOMON_CTRL_REG 0xb0
75#define REED_SOLOMON_ERROR_COUNT_REG_L 0xb1
76#define PRBS_CTRL_REG 0xb5
77
78#define LNB_CTRL_REG_1 0xc0
79#define LNB_CTRL_REG_2 0xc1
80#define LNB_CTRL_REG_3 0xc2
81#define LNB_CTRL_REG_4 0xc3
82#define LNB_CTRL_STATUS_REG 0xc4
83#define LNB_FIFO_REGS_0 0xc5
84#define LNB_FIFO_REGS_1 0xc6
85#define LNB_FIFO_REGS_2 0xc7
86#define LNB_FIFO_REGS_3 0xc8
87#define LNB_FIFO_REGS_4 0xc9
88#define LNB_FIFO_REGS_5 0xca
89#define LNB_SUPPLY_CTRL_REG_1 0xcb
90#define LNB_SUPPLY_CTRL_REG_2 0xcc
91#define LNB_SUPPLY_CTRL_REG_3 0xcd
92#define LNB_SUPPLY_CTRL_REG_4 0xce
93#define LNB_SUPPLY_STATUS_REG 0xcf
94
95#define FAIL -1
96#define PASS 0
97
98#define ALLOWABLE_FS_COUNT 10
99#define STATUS_BER 0
100#define STATUS_UCBLOCKS 1
101
102static int debug;
103#define dprintk(args...) \
104 do { \
105 if (debug) \
106 printk(KERN_DEBUG "si21xx: " args); \
107 } while (0)
108
109enum {
110 ACTIVE_HIGH,
111 ACTIVE_LOW
112};
113enum {
114 BYTE_WIDE,
115 BIT_WIDE
116};
117enum {
118 CLK_GAPPED_MODE,
119 CLK_CONTINUOUS_MODE
120};
121enum {
122 RISING_EDGE,
123 FALLING_EDGE
124};
125enum {
126 MSB_FIRST,
127 LSB_FIRST
128};
129enum {
130 SERIAL,
131 PARALLEL
132};
133
134struct si21xx_state {
135 struct i2c_adapter *i2c;
136 const struct si21xx_config *config;
137 struct dvb_frontend frontend;
138 u8 initialised:1;
139 int errmode;
140 int fs;
141};
142
143
144static u8 serit_sp1511lhb_inittab[] = {
145 0x01, 0x28,
146 0x20, 0x03,
147 0x27, 0x20,
148 0xe0, 0x45,
149 0xe1, 0x08,
150 0xfe, 0x01,
151 0x01, 0x28,
152 0x89, 0x09,
153 0x04, 0x80,
154 0x05, 0x01,
155 0x06, 0x00,
156 0x20, 0x03,
157 0x24, 0x88,
158 0x29, 0x09,
159 0x2a, 0x0f,
160 0x2c, 0x10,
161 0x2d, 0x19,
162 0x2e, 0x08,
163 0x2f, 0x10,
164 0x30, 0x19,
165 0x34, 0x20,
166 0x35, 0x03,
167 0x45, 0x02,
168 0x46, 0x45,
169 0x47, 0xd0,
170 0x48, 0x00,
171 0x49, 0x40,
172 0x4a, 0x03,
173 0x4c, 0xfd,
174 0x4f, 0x2e,
175 0x50, 0x2e,
176 0x51, 0x10,
177 0x52, 0x10,
178 0x56, 0x92,
179 0x59, 0x00,
180 0x5a, 0x2d,
181 0x5b, 0x33,
182 0x5c, 0x1f,
183 0x5f, 0x76,
184 0x62, 0xc0,
185 0x63, 0xc0,
186 0x64, 0xf3,
187 0x65, 0xf3,
188 0x79, 0x40,
189 0x6a, 0x40,
190 0x6b, 0x0a,
191 0x6c, 0x80,
192 0x6d, 0x27,
193 0x71, 0x06,
194 0x75, 0x60,
195 0x78, 0x00,
196 0x79, 0xb5,
197 0x7c, 0x05,
198 0x7d, 0x1a,
199 0x87, 0x55,
200 0x88, 0x72,
201 0x8f, 0x08,
202 0x90, 0xe0,
203 0x94, 0x40,
204 0xa0, 0x3f,
205 0xa1, 0xc0,
206 0xa4, 0xcc,
207 0xa5, 0x66,
208 0xa6, 0x66,
209 0xa7, 0x7b,
210 0xa8, 0x7b,
211 0xa9, 0x7b,
212 0xaa, 0x9a,
213 0xed, 0x04,
214 0xad, 0x00,
215 0xae, 0x03,
216 0xcc, 0xab,
217 0x01, 0x08,
218 0xff, 0xff
219};
220
221
222static int si21_writeregs(struct si21xx_state *state, u8 reg1,
223 u8 *data, int len)
224{
225 int ret;
226 u8 buf[60];
227 struct i2c_msg msg = {
228 .addr = state->config->demod_address,
229 .flags = 0,
230 .buf = buf,
231 .len = len + 1
232 };
233
234 if (len > sizeof(buf) - 1)
235 return -EINVAL;
236
237 msg.buf[0] = reg1;
238 memcpy(msg.buf + 1, data, len);
239
240 ret = i2c_transfer(state->i2c, &msg, 1);
241
242 if (ret != 1)
243 dprintk("%s: writereg error (reg1 == 0x%02x, data == 0x%02x, ret == %i)\n",
244 __func__, reg1, data[0], ret);
245
246 return (ret != 1) ? -EREMOTEIO : 0;
247}
248
249static int si21_writereg(struct si21xx_state *state, u8 reg, u8 data)
250{
251 int ret;
252 u8 buf[] = { reg, data };
253 struct i2c_msg msg = {
254 .addr = state->config->demod_address,
255 .flags = 0,
256 .buf = buf,
257 .len = 2
258 };
259
260 ret = i2c_transfer(state->i2c, &msg, 1);
261
262 if (ret != 1)
263 dprintk("%s: writereg error (reg == 0x%02x, data == 0x%02x, ret == %i)\n",
264 __func__, reg, data, ret);
265
266 return (ret != 1) ? -EREMOTEIO : 0;
267}
268
269static int si21_write(struct dvb_frontend *fe, const u8 buf[], int len)
270{
271 struct si21xx_state *state = fe->demodulator_priv;
272
273 if (len != 2)
274 return -EINVAL;
275
276 return si21_writereg(state, buf[0], buf[1]);
277}
278
279static u8 si21_readreg(struct si21xx_state *state, u8 reg)
280{
281 int ret;
282 u8 b0[] = { reg };
283 u8 b1[] = { 0 };
284 struct i2c_msg msg[] = {
285 {
286 .addr = state->config->demod_address,
287 .flags = 0,
288 .buf = b0,
289 .len = 1
290 }, {
291 .addr = state->config->demod_address,
292 .flags = I2C_M_RD,
293 .buf = b1,
294 .len = 1
295 }
296 };
297
298 ret = i2c_transfer(state->i2c, msg, 2);
299
300 if (ret != 2)
301 dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
302 __func__, reg, ret);
303
304 return b1[0];
305}
306
307static int si21_readregs(struct si21xx_state *state, u8 reg1, u8 *b, u8 len)
308{
309 int ret;
310 struct i2c_msg msg[] = {
311 {
312 .addr = state->config->demod_address,
313 .flags = 0,
314 .buf = ®1,
315 .len = 1
316 }, {
317 .addr = state->config->demod_address,
318 .flags = I2C_M_RD,
319 .buf = b,
320 .len = len
321 }
322 };
323
324 ret = i2c_transfer(state->i2c, msg, 2);
325
326 if (ret != 2)
327 dprintk("%s: readreg error (ret == %i)\n", __func__, ret);
328
329 return ret == 2 ? 0 : -1;
330}
331
332static int si21xx_wait_diseqc_idle(struct si21xx_state *state, int timeout)
333{
334 unsigned long start = jiffies;
335
336 dprintk("%s\n", __func__);
337
338 while ((si21_readreg(state, LNB_CTRL_REG_1) & 0x8) == 8) {
339 if (jiffies - start > timeout) {
340 dprintk("%s: timeout!!\n", __func__);
341 return -ETIMEDOUT;
342 }
343 msleep(10);
344 }
345
346 return 0;
347}
348
349static int si21xx_set_symbolrate(struct dvb_frontend *fe, u32 srate)
350{
351 struct si21xx_state *state = fe->demodulator_priv;
352 u32 sym_rate, data_rate;
353 int i;
354 u8 sym_rate_bytes[3];
355
356 dprintk("%s : srate = %i\n", __func__ , srate);
357
358 if ((srate < 1000000) || (srate > 45000000))
359 return -EINVAL;
360
361 data_rate = srate;
362 sym_rate = 0;
363
364 for (i = 0; i < 4; ++i) {
365 sym_rate /= 100;
366 sym_rate = sym_rate + ((data_rate % 100) * 0x800000) /
367 state->fs;
368 data_rate /= 100;
369 }
370 for (i = 0; i < 3; ++i)
371 sym_rate_bytes[i] = (u8)((sym_rate >> (i * 8)) & 0xff);
372
373 si21_writeregs(state, SYM_RATE_REG_L, sym_rate_bytes, 0x03);
374
375 return 0;
376}
377
378static int si21xx_send_diseqc_msg(struct dvb_frontend *fe,
379 struct dvb_diseqc_master_cmd *m)
380{
381 struct si21xx_state *state = fe->demodulator_priv;
382 u8 lnb_status;
383 u8 LNB_CTRL_1;
384 int status;
385
386 dprintk("%s\n", __func__);
387
388 status = PASS;
389 LNB_CTRL_1 = 0;
390
391 status |= si21_readregs(state, LNB_CTRL_STATUS_REG, &lnb_status, 0x01);
392 status |= si21_readregs(state, LNB_CTRL_REG_1, &lnb_status, 0x01);
393
394
395 status |= si21_writeregs(state, LNB_FIFO_REGS_0, m->msg, m->msg_len);
396
397 LNB_CTRL_1 = (lnb_status & 0x70);
398 LNB_CTRL_1 |= m->msg_len;
399
400 LNB_CTRL_1 |= 0x80;
401
402 status |= si21_writeregs(state, LNB_CTRL_REG_1, &LNB_CTRL_1, 0x01);
403
404 return status;
405}
406
407static int si21xx_send_diseqc_burst(struct dvb_frontend *fe,
408 enum fe_sec_mini_cmd burst)
409{
410 struct si21xx_state *state = fe->demodulator_priv;
411 u8 val;
412
413 dprintk("%s\n", __func__);
414
415 if (si21xx_wait_diseqc_idle(state, 100) < 0)
416 return -ETIMEDOUT;
417
418 val = (0x80 | si21_readreg(state, 0xc1));
419 if (si21_writereg(state, LNB_CTRL_REG_1,
420 burst == SEC_MINI_A ? (val & ~0x10) : (val | 0x10)))
421 return -EREMOTEIO;
422
423 if (si21xx_wait_diseqc_idle(state, 100) < 0)
424 return -ETIMEDOUT;
425
426 if (si21_writereg(state, LNB_CTRL_REG_1, val))
427 return -EREMOTEIO;
428
429 return 0;
430}
431
432static int si21xx_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
433{
434 struct si21xx_state *state = fe->demodulator_priv;
435 u8 val;
436
437 dprintk("%s\n", __func__);
438 val = (0x80 | si21_readreg(state, LNB_CTRL_REG_1));
439
440 switch (tone) {
441 case SEC_TONE_ON:
442 return si21_writereg(state, LNB_CTRL_REG_1, val | 0x20);
443
444 case SEC_TONE_OFF:
445 return si21_writereg(state, LNB_CTRL_REG_1, (val & ~0x20));
446
447 default:
448 return -EINVAL;
449 }
450}
451
452static int si21xx_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage volt)
453{
454 struct si21xx_state *state = fe->demodulator_priv;
455
456 u8 val;
457 dprintk("%s: %s\n", __func__,
458 volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
459 volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
460
461
462 val = (0x80 | si21_readreg(state, LNB_CTRL_REG_1));
463
464 switch (volt) {
465 case SEC_VOLTAGE_18:
466 return si21_writereg(state, LNB_CTRL_REG_1, val | 0x40);
467 break;
468 case SEC_VOLTAGE_13:
469 return si21_writereg(state, LNB_CTRL_REG_1, (val & ~0x40));
470 break;
471 default:
472 return -EINVAL;
473 }
474}
475
476static int si21xx_init(struct dvb_frontend *fe)
477{
478 struct si21xx_state *state = fe->demodulator_priv;
479 int i;
480 int status = 0;
481 u8 reg1;
482 u8 val;
483 u8 reg2[2];
484
485 dprintk("%s\n", __func__);
486
487 for (i = 0; ; i += 2) {
488 reg1 = serit_sp1511lhb_inittab[i];
489 val = serit_sp1511lhb_inittab[i+1];
490 if (reg1 == 0xff && val == 0xff)
491 break;
492 si21_writeregs(state, reg1, &val, 1);
493 }
494
495
496 reg1 = 0x08;
497 si21_writeregs(state, SYSTEM_MODE_REG, ®1, 0x01);
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515 reg2[0] =
516 PARALLEL + (LSB_FIRST << 1)
517 + (FALLING_EDGE << 2) + (CLK_GAPPED_MODE << 3)
518 + (BYTE_WIDE << 4) + (ACTIVE_HIGH << 5)
519 + (ACTIVE_HIGH << 6) + (ACTIVE_HIGH << 7);
520
521 reg2[1] = 0;
522
523
524
525
526 status |= si21_writeregs(state, TS_CTRL_REG_1, reg2, 0x02);
527 if (status != 0)
528 dprintk(" %s : TS Set Error\n", __func__);
529
530 return 0;
531
532}
533
534static int si21_read_status(struct dvb_frontend *fe, enum fe_status *status)
535{
536 struct si21xx_state *state = fe->demodulator_priv;
537 u8 regs_read[2];
538 u8 reg_read;
539 u8 i;
540 u8 lock;
541 u8 signal = si21_readreg(state, ANALOG_AGC_POWER_LEVEL_REG);
542
543 si21_readregs(state, LOCK_STATUS_REG_1, regs_read, 0x02);
544 reg_read = 0;
545
546 for (i = 0; i < 7; ++i)
547 reg_read |= ((regs_read[0] >> i) & 0x01) << (6 - i);
548
549 lock = ((reg_read & 0x7f) | (regs_read[1] & 0x80));
550
551 dprintk("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, lock);
552 *status = 0;
553
554 if (signal > 10)
555 *status |= FE_HAS_SIGNAL;
556
557 if (lock & 0x2)
558 *status |= FE_HAS_CARRIER;
559
560 if (lock & 0x20)
561 *status |= FE_HAS_VITERBI;
562
563 if (lock & 0x40)
564 *status |= FE_HAS_SYNC;
565
566 if ((lock & 0x7b) == 0x7b)
567 *status |= FE_HAS_LOCK;
568
569 return 0;
570}
571
572static int si21_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
573{
574 struct si21xx_state *state = fe->demodulator_priv;
575
576
577
578
579 u16 signal = (3 * si21_readreg(state, 0x27) *
580 si21_readreg(state, 0x28));
581
582 dprintk("%s : AGCPWR: 0x%02x%02x, signal=0x%04x\n", __func__,
583 si21_readreg(state, 0x27),
584 si21_readreg(state, 0x28), (int) signal);
585
586 signal <<= 4;
587 *strength = signal;
588
589 return 0;
590}
591
592static int si21_read_ber(struct dvb_frontend *fe, u32 *ber)
593{
594 struct si21xx_state *state = fe->demodulator_priv;
595
596 dprintk("%s\n", __func__);
597
598 if (state->errmode != STATUS_BER)
599 return 0;
600
601 *ber = (si21_readreg(state, 0x1d) << 8) |
602 si21_readreg(state, 0x1e);
603
604 return 0;
605}
606
607static int si21_read_snr(struct dvb_frontend *fe, u16 *snr)
608{
609 struct si21xx_state *state = fe->demodulator_priv;
610
611 s32 xsnr = 0xffff - ((si21_readreg(state, 0x24) << 8) |
612 si21_readreg(state, 0x25));
613 xsnr = 3 * (xsnr - 0xa100);
614 *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
615
616 dprintk("%s\n", __func__);
617
618 return 0;
619}
620
621static int si21_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
622{
623 struct si21xx_state *state = fe->demodulator_priv;
624
625 dprintk("%s\n", __func__);
626
627 if (state->errmode != STATUS_UCBLOCKS)
628 *ucblocks = 0;
629 else
630 *ucblocks = (si21_readreg(state, 0x1d) << 8) |
631 si21_readreg(state, 0x1e);
632
633 return 0;
634}
635
636
637
638static int si21xx_setacquire(struct dvb_frontend *fe, int symbrate,
639 enum fe_code_rate crate)
640{
641
642 struct si21xx_state *state = fe->demodulator_priv;
643 u8 coderates[] = {
644 0x0, 0x01, 0x02, 0x04, 0x00,
645 0x8, 0x10, 0x20, 0x00, 0x3f
646 };
647
648 u8 coderate_ptr;
649 int status;
650 u8 start_acq = 0x80;
651 u8 reg, regs[3];
652
653 dprintk("%s\n", __func__);
654
655 status = PASS;
656 coderate_ptr = coderates[crate];
657
658 si21xx_set_symbolrate(fe, symbrate);
659
660
661 status |= si21_writeregs(state,
662 VIT_SRCH_CTRL_REG_1,
663 &coderate_ptr, 0x01);
664
665
666 status |= si21_readregs(state, ACQ_CTRL_REG_2, ®, 0x01);
667 reg &= ~start_acq;
668 status |= si21_writeregs(state, ACQ_CTRL_REG_2, ®, 0x01);
669
670
671 regs[0] = 0xCB;
672 regs[1] = 0x40;
673 regs[2] = 0xCB;
674
675 status |= si21_writeregs(state,
676 TWO_DB_BNDWDTH_THRSHLD_REG,
677 ®s[0], 0x03);
678 reg = 0x56;
679 status |= si21_writeregs(state,
680 LSA_CTRL_REG_1, ®, 1);
681 reg = 0x05;
682 status |= si21_writeregs(state,
683 BLIND_SCAN_CTRL_REG, ®, 1);
684
685 status |= si21_writeregs(state,
686 ACQ_CTRL_REG_2, &start_acq, 0x01);
687
688 return status;
689}
690
691static int si21xx_set_frontend(struct dvb_frontend *fe)
692{
693 struct si21xx_state *state = fe->demodulator_priv;
694 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
695
696
697
698
699
700 unsigned char coarse_tune_freq;
701 int fine_tune_freq;
702 unsigned char sample_rate = 0;
703
704 bool inband_interferer_ind;
705
706
707 int icoarse_tune_freq;
708 int ifine_tune_freq;
709 unsigned int band_high;
710 unsigned int band_low;
711 unsigned int x1;
712 unsigned int x2;
713 int i;
714 bool inband_interferer_div2[ALLOWABLE_FS_COUNT];
715 bool inband_interferer_div4[ALLOWABLE_FS_COUNT];
716 int status;
717
718
719 int afs[ALLOWABLE_FS_COUNT] = { 200, 192, 193, 194, 195,
720 196, 204, 205, 206, 207
721 };
722
723 int if_limit_high;
724 int if_limit_low;
725 int lnb_lo;
726 int lnb_uncertanity;
727
728 int rf_freq;
729 int data_rate;
730 unsigned char regs[4];
731
732 dprintk("%s : FE_SET_FRONTEND\n", __func__);
733
734 if (c->delivery_system != SYS_DVBS) {
735 dprintk("%s: unsupported delivery system selected (%d)\n",
736 __func__, c->delivery_system);
737 return -EOPNOTSUPP;
738 }
739
740 for (i = 0; i < ALLOWABLE_FS_COUNT; ++i)
741 inband_interferer_div2[i] = inband_interferer_div4[i] = false;
742
743 if_limit_high = -700000;
744 if_limit_low = -100000;
745
746 lnb_lo = 0;
747 lnb_uncertanity = 0;
748
749 rf_freq = 10 * c->frequency ;
750 data_rate = c->symbol_rate / 100;
751
752 status = PASS;
753
754 band_low = (rf_freq - lnb_lo) - ((lnb_uncertanity * 200)
755 + (data_rate * 135)) / 200;
756
757 band_high = (rf_freq - lnb_lo) + ((lnb_uncertanity * 200)
758 + (data_rate * 135)) / 200;
759
760
761 icoarse_tune_freq = 100000 *
762 (((rf_freq - lnb_lo) -
763 (if_limit_low + if_limit_high) / 2)
764 / 100000);
765
766 ifine_tune_freq = (rf_freq - lnb_lo) - icoarse_tune_freq ;
767
768 for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) {
769 x1 = ((rf_freq - lnb_lo) / (afs[i] * 2500)) *
770 (afs[i] * 2500) + afs[i] * 2500;
771
772 x2 = ((rf_freq - lnb_lo) / (afs[i] * 2500)) *
773 (afs[i] * 2500);
774
775 if (((band_low < x1) && (x1 < band_high)) ||
776 ((band_low < x2) && (x2 < band_high)))
777 inband_interferer_div4[i] = true;
778
779 }
780
781 for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) {
782 x1 = ((rf_freq - lnb_lo) / (afs[i] * 5000)) *
783 (afs[i] * 5000) + afs[i] * 5000;
784
785 x2 = ((rf_freq - lnb_lo) / (afs[i] * 5000)) *
786 (afs[i] * 5000);
787
788 if (((band_low < x1) && (x1 < band_high)) ||
789 ((band_low < x2) && (x2 < band_high)))
790 inband_interferer_div2[i] = true;
791 }
792
793 inband_interferer_ind = true;
794 for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) {
795 if (inband_interferer_div2[i] || inband_interferer_div4[i]) {
796 inband_interferer_ind = false;
797 break;
798 }
799 }
800
801 if (inband_interferer_ind) {
802 for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) {
803 if (!inband_interferer_div2[i]) {
804 sample_rate = (u8) afs[i];
805 break;
806 }
807 }
808 } else {
809 for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) {
810 if ((inband_interferer_div2[i] ||
811 !inband_interferer_div4[i])) {
812 sample_rate = (u8) afs[i];
813 break;
814 }
815 }
816
817 }
818
819 if (sample_rate > 207 || sample_rate < 192)
820 sample_rate = 200;
821
822 fine_tune_freq = ((0x4000 * (ifine_tune_freq / 10)) /
823 ((sample_rate) * 1000));
824
825 coarse_tune_freq = (u8)(icoarse_tune_freq / 100000);
826
827 regs[0] = sample_rate;
828 regs[1] = coarse_tune_freq;
829 regs[2] = fine_tune_freq & 0xFF;
830 regs[3] = fine_tune_freq >> 8 & 0xFF;
831
832 status |= si21_writeregs(state, PLL_DIVISOR_REG, ®s[0], 0x04);
833
834 state->fs = sample_rate;
835 si21xx_setacquire(fe, c->symbol_rate, c->fec_inner);
836
837 return 0;
838}
839
840static int si21xx_sleep(struct dvb_frontend *fe)
841{
842 struct si21xx_state *state = fe->demodulator_priv;
843 u8 regdata;
844
845 dprintk("%s\n", __func__);
846
847 si21_readregs(state, SYSTEM_MODE_REG, ®data, 0x01);
848 regdata |= 1 << 6;
849 si21_writeregs(state, SYSTEM_MODE_REG, ®data, 0x01);
850 state->initialised = 0;
851
852 return 0;
853}
854
855static void si21xx_release(struct dvb_frontend *fe)
856{
857 struct si21xx_state *state = fe->demodulator_priv;
858
859 dprintk("%s\n", __func__);
860
861 kfree(state);
862}
863
864static const struct dvb_frontend_ops si21xx_ops = {
865 .delsys = { SYS_DVBS },
866 .info = {
867 .name = "SL SI21XX DVB-S",
868 .frequency_min_hz = 950 * MHz,
869 .frequency_max_hz = 2150 * MHz,
870 .frequency_stepsize_hz = 125 * kHz,
871 .symbol_rate_min = 1000000,
872 .symbol_rate_max = 45000000,
873 .symbol_rate_tolerance = 500,
874 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
875 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
876 FE_CAN_QPSK |
877 FE_CAN_FEC_AUTO
878 },
879
880 .release = si21xx_release,
881 .init = si21xx_init,
882 .sleep = si21xx_sleep,
883 .write = si21_write,
884 .read_status = si21_read_status,
885 .read_ber = si21_read_ber,
886 .read_signal_strength = si21_read_signal_strength,
887 .read_snr = si21_read_snr,
888 .read_ucblocks = si21_read_ucblocks,
889 .diseqc_send_master_cmd = si21xx_send_diseqc_msg,
890 .diseqc_send_burst = si21xx_send_diseqc_burst,
891 .set_tone = si21xx_set_tone,
892 .set_voltage = si21xx_set_voltage,
893
894 .set_frontend = si21xx_set_frontend,
895};
896
897struct dvb_frontend *si21xx_attach(const struct si21xx_config *config,
898 struct i2c_adapter *i2c)
899{
900 struct si21xx_state *state = NULL;
901 int id;
902
903 dprintk("%s\n", __func__);
904
905
906 state = kzalloc(sizeof(struct si21xx_state), GFP_KERNEL);
907 if (state == NULL)
908 goto error;
909
910
911 state->config = config;
912 state->i2c = i2c;
913 state->initialised = 0;
914 state->errmode = STATUS_BER;
915
916
917 id = si21_readreg(state, SYSTEM_MODE_REG);
918 si21_writereg(state, SYSTEM_MODE_REG, id | 0x40);
919 msleep(200);
920 id = si21_readreg(state, 0x00);
921
922
923
924
925
926
927
928 if (id != 0x04 && id != 0x14)
929 goto error;
930
931
932 memcpy(&state->frontend.ops, &si21xx_ops,
933 sizeof(struct dvb_frontend_ops));
934 state->frontend.demodulator_priv = state;
935 return &state->frontend;
936
937error:
938 kfree(state);
939 return NULL;
940}
941EXPORT_SYMBOL(si21xx_attach);
942
943module_param(debug, int, 0644);
944MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
945
946MODULE_DESCRIPTION("SL SI21XX DVB Demodulator driver");
947MODULE_AUTHOR("Igor M. Liplianin");
948MODULE_LICENSE("GPL");
949
