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45#include <linux/init.h>
46#include <linux/kernel.h>
47#include <linux/ktime.h>
48#include <linux/module.h>
49#include <linux/string.h>
50#include <linux/slab.h>
51#include <linux/jiffies.h>
52#include <asm/div64.h>
53
54#include <media/dvb_frontend.h>
55#include "stv0299.h"
56
57struct stv0299_state {
58 struct i2c_adapter* i2c;
59 const struct stv0299_config* config;
60 struct dvb_frontend frontend;
61
62 u8 initialised:1;
63 u32 tuner_frequency;
64 u32 symbol_rate;
65 enum fe_code_rate fec_inner;
66 int errmode;
67 u32 ucblocks;
68 u8 mcr_reg;
69};
70
71#define STATUS_BER 0
72#define STATUS_UCBLOCKS 1
73
74static int debug;
75static int debug_legacy_dish_switch;
76#define dprintk(args...) \
77 do { \
78 if (debug) printk(KERN_DEBUG "stv0299: " args); \
79 } while (0)
80
81
82static int stv0299_writeregI (struct stv0299_state* state, u8 reg, u8 data)
83{
84 int ret;
85 u8 buf [] = { reg, data };
86 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
87
88 ret = i2c_transfer (state->i2c, &msg, 1);
89
90 if (ret != 1)
91 dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
92 __func__, reg, data, ret);
93
94 return (ret != 1) ? -EREMOTEIO : 0;
95}
96
97static int stv0299_write(struct dvb_frontend* fe, const u8 buf[], int len)
98{
99 struct stv0299_state* state = fe->demodulator_priv;
100
101 if (len != 2)
102 return -EINVAL;
103
104 return stv0299_writeregI(state, buf[0], buf[1]);
105}
106
107static u8 stv0299_readreg (struct stv0299_state* state, u8 reg)
108{
109 int ret;
110 u8 b0 [] = { reg };
111 u8 b1 [] = { 0 };
112 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
113 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
114
115 ret = i2c_transfer (state->i2c, msg, 2);
116
117 if (ret != 2)
118 dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
119 __func__, reg, ret);
120
121 return b1[0];
122}
123
124static int stv0299_readregs (struct stv0299_state* state, u8 reg1, u8 *b, u8 len)
125{
126 int ret;
127 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 },
128 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
129
130 ret = i2c_transfer (state->i2c, msg, 2);
131
132 if (ret != 2)
133 dprintk("%s: readreg error (ret == %i)\n", __func__, ret);
134
135 return ret == 2 ? 0 : ret;
136}
137
138static int stv0299_set_FEC(struct stv0299_state *state, enum fe_code_rate fec)
139{
140 dprintk ("%s\n", __func__);
141
142 switch (fec) {
143 case FEC_AUTO:
144 {
145 return stv0299_writeregI (state, 0x31, 0x1f);
146 }
147 case FEC_1_2:
148 {
149 return stv0299_writeregI (state, 0x31, 0x01);
150 }
151 case FEC_2_3:
152 {
153 return stv0299_writeregI (state, 0x31, 0x02);
154 }
155 case FEC_3_4:
156 {
157 return stv0299_writeregI (state, 0x31, 0x04);
158 }
159 case FEC_5_6:
160 {
161 return stv0299_writeregI (state, 0x31, 0x08);
162 }
163 case FEC_7_8:
164 {
165 return stv0299_writeregI (state, 0x31, 0x10);
166 }
167 default:
168 {
169 return -EINVAL;
170 }
171 }
172}
173
174static enum fe_code_rate stv0299_get_fec(struct stv0299_state *state)
175{
176 static enum fe_code_rate fec_tab[] = { FEC_2_3, FEC_3_4, FEC_5_6,
177 FEC_7_8, FEC_1_2 };
178 u8 index;
179
180 dprintk ("%s\n", __func__);
181
182 index = stv0299_readreg (state, 0x1b);
183 index &= 0x7;
184
185 if (index > 4)
186 return FEC_AUTO;
187
188 return fec_tab [index];
189}
190
191static int stv0299_wait_diseqc_fifo (struct stv0299_state* state, int timeout)
192{
193 unsigned long start = jiffies;
194
195 dprintk ("%s\n", __func__);
196
197 while (stv0299_readreg(state, 0x0a) & 1) {
198 if (jiffies - start > timeout) {
199 dprintk ("%s: timeout!!\n", __func__);
200 return -ETIMEDOUT;
201 }
202 msleep(10);
203 }
204
205 return 0;
206}
207
208static int stv0299_wait_diseqc_idle (struct stv0299_state* state, int timeout)
209{
210 unsigned long start = jiffies;
211
212 dprintk ("%s\n", __func__);
213
214 while ((stv0299_readreg(state, 0x0a) & 3) != 2 ) {
215 if (jiffies - start > timeout) {
216 dprintk ("%s: timeout!!\n", __func__);
217 return -ETIMEDOUT;
218 }
219 msleep(10);
220 }
221
222 return 0;
223}
224
225static int stv0299_set_symbolrate (struct dvb_frontend* fe, u32 srate)
226{
227 struct stv0299_state* state = fe->demodulator_priv;
228 u64 big = srate;
229 u32 ratio;
230
231
232 if ((srate < 1000000) || (srate > 45000000)) return -EINVAL;
233
234
235 big = big << 20;
236 big += (state->config->mclk-1);
237 do_div(big, state->config->mclk);
238 ratio = big << 4;
239
240 return state->config->set_symbol_rate(fe, srate, ratio);
241}
242
243static int stv0299_get_symbolrate (struct stv0299_state* state)
244{
245 u32 Mclk = state->config->mclk / 4096L;
246 u32 srate;
247 s32 offset;
248 u8 sfr[3];
249 s8 rtf;
250
251 dprintk ("%s\n", __func__);
252
253 stv0299_readregs (state, 0x1f, sfr, 3);
254 stv0299_readregs (state, 0x1a, (u8 *)&rtf, 1);
255
256 srate = (sfr[0] << 8) | sfr[1];
257 srate *= Mclk;
258 srate /= 16;
259 srate += (sfr[2] >> 4) * Mclk / 256;
260 offset = (s32) rtf * (srate / 4096L);
261 offset /= 128;
262
263 dprintk ("%s : srate = %i\n", __func__, srate);
264 dprintk ("%s : ofset = %i\n", __func__, offset);
265
266 srate += offset;
267
268 srate += 1000;
269 srate /= 2000;
270 srate *= 2000;
271
272 return srate;
273}
274
275static int stv0299_send_diseqc_msg (struct dvb_frontend* fe,
276 struct dvb_diseqc_master_cmd *m)
277{
278 struct stv0299_state* state = fe->demodulator_priv;
279 u8 val;
280 int i;
281
282 dprintk ("%s\n", __func__);
283
284 if (stv0299_wait_diseqc_idle (state, 100) < 0)
285 return -ETIMEDOUT;
286
287 val = stv0299_readreg (state, 0x08);
288
289 if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x6))
290 return -EREMOTEIO;
291
292 for (i=0; i<m->msg_len; i++) {
293 if (stv0299_wait_diseqc_fifo (state, 100) < 0)
294 return -ETIMEDOUT;
295
296 if (stv0299_writeregI (state, 0x09, m->msg[i]))
297 return -EREMOTEIO;
298 }
299
300 if (stv0299_wait_diseqc_idle (state, 100) < 0)
301 return -ETIMEDOUT;
302
303 return 0;
304}
305
306static int stv0299_send_diseqc_burst(struct dvb_frontend *fe,
307 enum fe_sec_mini_cmd burst)
308{
309 struct stv0299_state* state = fe->demodulator_priv;
310 u8 val;
311
312 dprintk ("%s\n", __func__);
313
314 if (stv0299_wait_diseqc_idle (state, 100) < 0)
315 return -ETIMEDOUT;
316
317 val = stv0299_readreg (state, 0x08);
318
319 if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x2))
320 return -EREMOTEIO;
321
322 if (stv0299_writeregI (state, 0x09, burst == SEC_MINI_A ? 0x00 : 0xff))
323 return -EREMOTEIO;
324
325 if (stv0299_wait_diseqc_idle (state, 100) < 0)
326 return -ETIMEDOUT;
327
328 if (stv0299_writeregI (state, 0x08, val))
329 return -EREMOTEIO;
330
331 return 0;
332}
333
334static int stv0299_set_tone(struct dvb_frontend *fe,
335 enum fe_sec_tone_mode tone)
336{
337 struct stv0299_state* state = fe->demodulator_priv;
338 u8 val;
339
340 if (stv0299_wait_diseqc_idle (state, 100) < 0)
341 return -ETIMEDOUT;
342
343 val = stv0299_readreg (state, 0x08);
344
345 switch (tone) {
346 case SEC_TONE_ON:
347 return stv0299_writeregI (state, 0x08, val | 0x3);
348
349 case SEC_TONE_OFF:
350 return stv0299_writeregI (state, 0x08, (val & ~0x3) | 0x02);
351
352 default:
353 return -EINVAL;
354 }
355}
356
357static int stv0299_set_voltage(struct dvb_frontend *fe,
358 enum fe_sec_voltage voltage)
359{
360 struct stv0299_state* state = fe->demodulator_priv;
361 u8 reg0x08;
362 u8 reg0x0c;
363
364 dprintk("%s: %s\n", __func__,
365 voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
366 voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
367
368 reg0x08 = stv0299_readreg (state, 0x08);
369 reg0x0c = stv0299_readreg (state, 0x0c);
370
371
372
373
374 reg0x0c &= 0x0f;
375 reg0x08 = (reg0x08 & 0x3f) | (state->config->lock_output << 6);
376
377 switch (voltage) {
378 case SEC_VOLTAGE_13:
379 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
380 reg0x0c |= 0x10;
381 else
382 reg0x0c |= 0x40;
383 break;
384 case SEC_VOLTAGE_18:
385 reg0x0c |= 0x50;
386 break;
387 case SEC_VOLTAGE_OFF:
388
389 reg0x08 = 0x00;
390 reg0x0c = 0x00;
391 break;
392 default:
393 return -EINVAL;
394 }
395
396 if (state->config->op0_off)
397 reg0x0c &= ~0x10;
398
399 stv0299_writeregI(state, 0x08, reg0x08);
400 return stv0299_writeregI(state, 0x0c, reg0x0c);
401}
402
403static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd)
404{
405 struct stv0299_state* state = fe->demodulator_priv;
406 u8 reg0x08;
407 u8 reg0x0c;
408 u8 lv_mask = 0x40;
409 u8 last = 1;
410 int i;
411 ktime_t nexttime;
412 ktime_t tv[10];
413
414 reg0x08 = stv0299_readreg (state, 0x08);
415 reg0x0c = stv0299_readreg (state, 0x0c);
416 reg0x0c &= 0x0f;
417 stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
418 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
419 lv_mask = 0x10;
420
421 cmd = cmd << 1;
422 if (debug_legacy_dish_switch)
423 printk ("%s switch command: 0x%04lx\n",__func__, cmd);
424
425 nexttime = ktime_get_boottime();
426 if (debug_legacy_dish_switch)
427 tv[0] = nexttime;
428 stv0299_writeregI (state, 0x0c, reg0x0c | 0x50);
429
430 dvb_frontend_sleep_until(&nexttime, 32000);
431
432 for (i=0; i<9; i++) {
433 if (debug_legacy_dish_switch)
434 tv[i+1] = ktime_get_boottime();
435 if((cmd & 0x01) != last) {
436
437 stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
438 last = (last) ? 0 : 1;
439 }
440
441 cmd = cmd >> 1;
442
443 if (i != 8)
444 dvb_frontend_sleep_until(&nexttime, 8000);
445 }
446 if (debug_legacy_dish_switch) {
447 printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
448 __func__, fe->dvb->num);
449 for (i = 1; i < 10; i++)
450 printk("%d: %d\n", i,
451 (int) ktime_us_delta(tv[i], tv[i-1]));
452 }
453
454 return 0;
455}
456
457static int stv0299_init (struct dvb_frontend* fe)
458{
459 struct stv0299_state* state = fe->demodulator_priv;
460 int i;
461 u8 reg;
462 u8 val;
463
464 dprintk("stv0299: init chip\n");
465
466 stv0299_writeregI(state, 0x02, 0x30 | state->mcr_reg);
467 msleep(50);
468
469 for (i = 0; ; i += 2) {
470 reg = state->config->inittab[i];
471 val = state->config->inittab[i+1];
472 if (reg == 0xff && val == 0xff)
473 break;
474 if (reg == 0x0c && state->config->op0_off)
475 val &= ~0x10;
476 if (reg == 0x2)
477 state->mcr_reg = val & 0xf;
478 stv0299_writeregI(state, reg, val);
479 }
480
481 return 0;
482}
483
484static int stv0299_read_status(struct dvb_frontend *fe,
485 enum fe_status *status)
486{
487 struct stv0299_state* state = fe->demodulator_priv;
488
489 u8 signal = 0xff - stv0299_readreg (state, 0x18);
490 u8 sync = stv0299_readreg (state, 0x1b);
491
492 dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
493 *status = 0;
494
495 if (signal > 10)
496 *status |= FE_HAS_SIGNAL;
497
498 if (sync & 0x80)
499 *status |= FE_HAS_CARRIER;
500
501 if (sync & 0x10)
502 *status |= FE_HAS_VITERBI;
503
504 if (sync & 0x08)
505 *status |= FE_HAS_SYNC;
506
507 if ((sync & 0x98) == 0x98)
508 *status |= FE_HAS_LOCK;
509
510 return 0;
511}
512
513static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)
514{
515 struct stv0299_state* state = fe->demodulator_priv;
516
517 if (state->errmode != STATUS_BER)
518 return -ENOSYS;
519
520 *ber = stv0299_readreg(state, 0x1e) | (stv0299_readreg(state, 0x1d) << 8);
521
522 return 0;
523}
524
525static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)
526{
527 struct stv0299_state* state = fe->demodulator_priv;
528
529 s32 signal = 0xffff - ((stv0299_readreg (state, 0x18) << 8)
530 | stv0299_readreg (state, 0x19));
531
532 dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __func__,
533 stv0299_readreg (state, 0x18),
534 stv0299_readreg (state, 0x19), (int) signal);
535
536 signal = signal * 5 / 4;
537 *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
538
539 return 0;
540}
541
542static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)
543{
544 struct stv0299_state* state = fe->demodulator_priv;
545
546 s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)
547 | stv0299_readreg (state, 0x25));
548 xsnr = 3 * (xsnr - 0xa100);
549 *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
550
551 return 0;
552}
553
554static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
555{
556 struct stv0299_state* state = fe->demodulator_priv;
557
558 if (state->errmode != STATUS_UCBLOCKS)
559 return -ENOSYS;
560
561 state->ucblocks += stv0299_readreg(state, 0x1e);
562 state->ucblocks += (stv0299_readreg(state, 0x1d) << 8);
563 *ucblocks = state->ucblocks;
564
565 return 0;
566}
567
568static int stv0299_set_frontend(struct dvb_frontend *fe)
569{
570 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
571 struct stv0299_state* state = fe->demodulator_priv;
572 int invval = 0;
573
574 dprintk ("%s : FE_SET_FRONTEND\n", __func__);
575 if (state->config->set_ts_params)
576 state->config->set_ts_params(fe, 0);
577
578
579 if (p->inversion == INVERSION_OFF) invval = 0;
580 else if (p->inversion == INVERSION_ON) invval = 1;
581 else {
582 printk("stv0299 does not support auto-inversion\n");
583 return -EINVAL;
584 }
585 if (state->config->invert) invval = (~invval) & 1;
586 stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);
587
588 if (fe->ops.tuner_ops.set_params) {
589 fe->ops.tuner_ops.set_params(fe);
590 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
591 }
592
593 stv0299_set_FEC(state, p->fec_inner);
594 stv0299_set_symbolrate(fe, p->symbol_rate);
595 stv0299_writeregI(state, 0x22, 0x00);
596 stv0299_writeregI(state, 0x23, 0x00);
597
598 state->tuner_frequency = p->frequency;
599 state->fec_inner = p->fec_inner;
600 state->symbol_rate = p->symbol_rate;
601
602 return 0;
603}
604
605static int stv0299_get_frontend(struct dvb_frontend *fe,
606 struct dtv_frontend_properties *p)
607{
608 struct stv0299_state* state = fe->demodulator_priv;
609 s32 derot_freq;
610 int invval;
611
612 derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)
613 | stv0299_readreg (state, 0x23));
614
615 derot_freq *= (state->config->mclk >> 16);
616 derot_freq += 500;
617 derot_freq /= 1000;
618
619 p->frequency += derot_freq;
620
621 invval = stv0299_readreg (state, 0x0c) & 1;
622 if (state->config->invert) invval = (~invval) & 1;
623 p->inversion = invval ? INVERSION_ON : INVERSION_OFF;
624
625 p->fec_inner = stv0299_get_fec(state);
626 p->symbol_rate = stv0299_get_symbolrate(state);
627
628 return 0;
629}
630
631static int stv0299_sleep(struct dvb_frontend* fe)
632{
633 struct stv0299_state* state = fe->demodulator_priv;
634
635 stv0299_writeregI(state, 0x02, 0xb0 | state->mcr_reg);
636 state->initialised = 0;
637
638 return 0;
639}
640
641static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
642{
643 struct stv0299_state* state = fe->demodulator_priv;
644
645 if (enable) {
646 stv0299_writeregI(state, 0x05, 0xb5);
647 } else {
648 stv0299_writeregI(state, 0x05, 0x35);
649 }
650 udelay(1);
651 return 0;
652}
653
654static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
655{
656 struct stv0299_state* state = fe->demodulator_priv;
657 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
658
659 fesettings->min_delay_ms = state->config->min_delay_ms;
660 if (p->symbol_rate < 10000000) {
661 fesettings->step_size = p->symbol_rate / 32000;
662 fesettings->max_drift = 5000;
663 } else {
664 fesettings->step_size = p->symbol_rate / 16000;
665 fesettings->max_drift = p->symbol_rate / 2000;
666 }
667 return 0;
668}
669
670static void stv0299_release(struct dvb_frontend* fe)
671{
672 struct stv0299_state* state = fe->demodulator_priv;
673 kfree(state);
674}
675
676static const struct dvb_frontend_ops stv0299_ops;
677
678struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,
679 struct i2c_adapter* i2c)
680{
681 struct stv0299_state* state = NULL;
682 int id;
683
684
685 state = kzalloc(sizeof(struct stv0299_state), GFP_KERNEL);
686 if (state == NULL) goto error;
687
688
689 state->config = config;
690 state->i2c = i2c;
691 state->initialised = 0;
692 state->tuner_frequency = 0;
693 state->symbol_rate = 0;
694 state->fec_inner = 0;
695 state->errmode = STATUS_BER;
696
697
698 stv0299_writeregI(state, 0x02, 0x30);
699 msleep(200);
700 id = stv0299_readreg(state, 0x00);
701
702
703
704 if (id != 0xa1 && id != 0x80) goto error;
705
706
707 memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));
708 state->frontend.demodulator_priv = state;
709 return &state->frontend;
710
711error:
712 kfree(state);
713 return NULL;
714}
715
716static const struct dvb_frontend_ops stv0299_ops = {
717 .delsys = { SYS_DVBS },
718 .info = {
719 .name = "ST STV0299 DVB-S",
720 .frequency_min = 950000,
721 .frequency_max = 2150000,
722 .frequency_stepsize = 125,
723 .frequency_tolerance = 0,
724 .symbol_rate_min = 1000000,
725 .symbol_rate_max = 45000000,
726 .symbol_rate_tolerance = 500,
727 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
728 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
729 FE_CAN_QPSK |
730 FE_CAN_FEC_AUTO
731 },
732
733 .release = stv0299_release,
734
735 .init = stv0299_init,
736 .sleep = stv0299_sleep,
737 .write = stv0299_write,
738 .i2c_gate_ctrl = stv0299_i2c_gate_ctrl,
739
740 .set_frontend = stv0299_set_frontend,
741 .get_frontend = stv0299_get_frontend,
742 .get_tune_settings = stv0299_get_tune_settings,
743
744 .read_status = stv0299_read_status,
745 .read_ber = stv0299_read_ber,
746 .read_signal_strength = stv0299_read_signal_strength,
747 .read_snr = stv0299_read_snr,
748 .read_ucblocks = stv0299_read_ucblocks,
749
750 .diseqc_send_master_cmd = stv0299_send_diseqc_msg,
751 .diseqc_send_burst = stv0299_send_diseqc_burst,
752 .set_tone = stv0299_set_tone,
753 .set_voltage = stv0299_set_voltage,
754 .dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
755};
756
757module_param(debug_legacy_dish_switch, int, 0444);
758MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");
759
760module_param(debug, int, 0644);
761MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
762
763MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");
764MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, Andreas Oberritter, Andrew de Quincey, Kenneth Aafly");
765MODULE_LICENSE("GPL");
766
767EXPORT_SYMBOL(stv0299_attach);
768
