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