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33#include <linux/init.h>
34#include <linux/kernel.h>
35#include <linux/ktime.h>
36#include <linux/module.h>
37#include <linux/string.h>
38#include <linux/slab.h>
39#include <linux/jiffies.h>
40#include <asm/div64.h>
41
42#include <media/dvb_frontend.h>
43#include "stv0299.h"
44
45struct stv0299_state {
46 struct i2c_adapter* i2c;
47 const struct stv0299_config* config;
48 struct dvb_frontend frontend;
49
50 u8 initialised:1;
51 u32 tuner_frequency;
52 u32 symbol_rate;
53 enum fe_code_rate fec_inner;
54 int errmode;
55 u32 ucblocks;
56 u8 mcr_reg;
57};
58
59#define STATUS_BER 0
60#define STATUS_UCBLOCKS 1
61
62static int debug;
63static int debug_legacy_dish_switch;
64#define dprintk(args...) \
65 do { \
66 if (debug) printk(KERN_DEBUG "stv0299: " args); \
67 } while (0)
68
69
70static int stv0299_writeregI (struct stv0299_state* state, u8 reg, u8 data)
71{
72 int ret;
73 u8 buf [] = { reg, data };
74 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
75
76 ret = i2c_transfer (state->i2c, &msg, 1);
77
78 if (ret != 1)
79 dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
80 __func__, reg, data, ret);
81
82 return (ret != 1) ? -EREMOTEIO : 0;
83}
84
85static int stv0299_write(struct dvb_frontend* fe, const u8 buf[], int len)
86{
87 struct stv0299_state* state = fe->demodulator_priv;
88
89 if (len != 2)
90 return -EINVAL;
91
92 return stv0299_writeregI(state, buf[0], buf[1]);
93}
94
95static u8 stv0299_readreg (struct stv0299_state* state, u8 reg)
96{
97 int ret;
98 u8 b0 [] = { reg };
99 u8 b1 [] = { 0 };
100 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
101 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
102
103 ret = i2c_transfer (state->i2c, msg, 2);
104
105 if (ret != 2)
106 dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
107 __func__, reg, ret);
108
109 return b1[0];
110}
111
112static int stv0299_readregs (struct stv0299_state* state, u8 reg1, u8 *b, u8 len)
113{
114 int ret;
115 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 },
116 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
117
118 ret = i2c_transfer (state->i2c, msg, 2);
119
120 if (ret != 2)
121 dprintk("%s: readreg error (ret == %i)\n", __func__, ret);
122
123 return ret == 2 ? 0 : ret;
124}
125
126static int stv0299_set_FEC(struct stv0299_state *state, enum fe_code_rate fec)
127{
128 dprintk ("%s\n", __func__);
129
130 switch (fec) {
131 case FEC_AUTO:
132 {
133 return stv0299_writeregI (state, 0x31, 0x1f);
134 }
135 case FEC_1_2:
136 {
137 return stv0299_writeregI (state, 0x31, 0x01);
138 }
139 case FEC_2_3:
140 {
141 return stv0299_writeregI (state, 0x31, 0x02);
142 }
143 case FEC_3_4:
144 {
145 return stv0299_writeregI (state, 0x31, 0x04);
146 }
147 case FEC_5_6:
148 {
149 return stv0299_writeregI (state, 0x31, 0x08);
150 }
151 case FEC_7_8:
152 {
153 return stv0299_writeregI (state, 0x31, 0x10);
154 }
155 default:
156 {
157 return -EINVAL;
158 }
159 }
160}
161
162static enum fe_code_rate stv0299_get_fec(struct stv0299_state *state)
163{
164 static enum fe_code_rate fec_tab[] = { FEC_2_3, FEC_3_4, FEC_5_6,
165 FEC_7_8, FEC_1_2 };
166 u8 index;
167
168 dprintk ("%s\n", __func__);
169
170 index = stv0299_readreg (state, 0x1b);
171 index &= 0x7;
172
173 if (index > 4)
174 return FEC_AUTO;
175
176 return fec_tab [index];
177}
178
179static int stv0299_wait_diseqc_fifo (struct stv0299_state* state, int timeout)
180{
181 unsigned long start = jiffies;
182
183 dprintk ("%s\n", __func__);
184
185 while (stv0299_readreg(state, 0x0a) & 1) {
186 if (jiffies - start > timeout) {
187 dprintk ("%s: timeout!!\n", __func__);
188 return -ETIMEDOUT;
189 }
190 msleep(10);
191 }
192
193 return 0;
194}
195
196static int stv0299_wait_diseqc_idle (struct stv0299_state* state, int timeout)
197{
198 unsigned long start = jiffies;
199
200 dprintk ("%s\n", __func__);
201
202 while ((stv0299_readreg(state, 0x0a) & 3) != 2 ) {
203 if (jiffies - start > timeout) {
204 dprintk ("%s: timeout!!\n", __func__);
205 return -ETIMEDOUT;
206 }
207 msleep(10);
208 }
209
210 return 0;
211}
212
213static int stv0299_set_symbolrate (struct dvb_frontend* fe, u32 srate)
214{
215 struct stv0299_state* state = fe->demodulator_priv;
216 u64 big = srate;
217 u32 ratio;
218
219
220 if ((srate < 1000000) || (srate > 45000000)) return -EINVAL;
221
222
223 big = big << 20;
224 big += (state->config->mclk-1);
225 do_div(big, state->config->mclk);
226 ratio = big << 4;
227
228 return state->config->set_symbol_rate(fe, srate, ratio);
229}
230
231static int stv0299_get_symbolrate (struct stv0299_state* state)
232{
233 u32 Mclk = state->config->mclk / 4096L;
234 u32 srate;
235 s32 offset;
236 u8 sfr[3];
237 s8 rtf;
238
239 dprintk ("%s\n", __func__);
240
241 stv0299_readregs (state, 0x1f, sfr, 3);
242 stv0299_readregs (state, 0x1a, (u8 *)&rtf, 1);
243
244 srate = (sfr[0] << 8) | sfr[1];
245 srate *= Mclk;
246 srate /= 16;
247 srate += (sfr[2] >> 4) * Mclk / 256;
248 offset = (s32) rtf * (srate / 4096L);
249 offset /= 128;
250
251 dprintk ("%s : srate = %i\n", __func__, srate);
252 dprintk ("%s : ofset = %i\n", __func__, offset);
253
254 srate += offset;
255
256 srate += 1000;
257 srate /= 2000;
258 srate *= 2000;
259
260 return srate;
261}
262
263static int stv0299_send_diseqc_msg (struct dvb_frontend* fe,
264 struct dvb_diseqc_master_cmd *m)
265{
266 struct stv0299_state* state = fe->demodulator_priv;
267 u8 val;
268 int i;
269
270 dprintk ("%s\n", __func__);
271
272 if (stv0299_wait_diseqc_idle (state, 100) < 0)
273 return -ETIMEDOUT;
274
275 val = stv0299_readreg (state, 0x08);
276
277 if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x6))
278 return -EREMOTEIO;
279
280 for (i=0; i<m->msg_len; i++) {
281 if (stv0299_wait_diseqc_fifo (state, 100) < 0)
282 return -ETIMEDOUT;
283
284 if (stv0299_writeregI (state, 0x09, m->msg[i]))
285 return -EREMOTEIO;
286 }
287
288 if (stv0299_wait_diseqc_idle (state, 100) < 0)
289 return -ETIMEDOUT;
290
291 return 0;
292}
293
294static int stv0299_send_diseqc_burst(struct dvb_frontend *fe,
295 enum fe_sec_mini_cmd burst)
296{
297 struct stv0299_state* state = fe->demodulator_priv;
298 u8 val;
299
300 dprintk ("%s\n", __func__);
301
302 if (stv0299_wait_diseqc_idle (state, 100) < 0)
303 return -ETIMEDOUT;
304
305 val = stv0299_readreg (state, 0x08);
306
307 if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x2))
308 return -EREMOTEIO;
309
310 if (stv0299_writeregI (state, 0x09, burst == SEC_MINI_A ? 0x00 : 0xff))
311 return -EREMOTEIO;
312
313 if (stv0299_wait_diseqc_idle (state, 100) < 0)
314 return -ETIMEDOUT;
315
316 if (stv0299_writeregI (state, 0x08, val))
317 return -EREMOTEIO;
318
319 return 0;
320}
321
322static int stv0299_set_tone(struct dvb_frontend *fe,
323 enum fe_sec_tone_mode tone)
324{
325 struct stv0299_state* state = fe->demodulator_priv;
326 u8 val;
327
328 if (stv0299_wait_diseqc_idle (state, 100) < 0)
329 return -ETIMEDOUT;
330
331 val = stv0299_readreg (state, 0x08);
332
333 switch (tone) {
334 case SEC_TONE_ON:
335 return stv0299_writeregI (state, 0x08, val | 0x3);
336
337 case SEC_TONE_OFF:
338 return stv0299_writeregI (state, 0x08, (val & ~0x3) | 0x02);
339
340 default:
341 return -EINVAL;
342 }
343}
344
345static int stv0299_set_voltage(struct dvb_frontend *fe,
346 enum fe_sec_voltage voltage)
347{
348 struct stv0299_state* state = fe->demodulator_priv;
349 u8 reg0x08;
350 u8 reg0x0c;
351
352 dprintk("%s: %s\n", __func__,
353 voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
354 voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
355
356 reg0x08 = stv0299_readreg (state, 0x08);
357 reg0x0c = stv0299_readreg (state, 0x0c);
358
359
360
361
362 reg0x0c &= 0x0f;
363 reg0x08 = (reg0x08 & 0x3f) | (state->config->lock_output << 6);
364
365 switch (voltage) {
366 case SEC_VOLTAGE_13:
367 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
368 reg0x0c |= 0x10;
369 else
370 reg0x0c |= 0x40;
371 break;
372 case SEC_VOLTAGE_18:
373 reg0x0c |= 0x50;
374 break;
375 case SEC_VOLTAGE_OFF:
376
377 reg0x08 = 0x00;
378 reg0x0c = 0x00;
379 break;
380 default:
381 return -EINVAL;
382 }
383
384 if (state->config->op0_off)
385 reg0x0c &= ~0x10;
386
387 stv0299_writeregI(state, 0x08, reg0x08);
388 return stv0299_writeregI(state, 0x0c, reg0x0c);
389}
390
391static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd)
392{
393 struct stv0299_state* state = fe->demodulator_priv;
394 u8 reg0x08;
395 u8 reg0x0c;
396 u8 lv_mask = 0x40;
397 u8 last = 1;
398 int i;
399 ktime_t nexttime;
400 ktime_t tv[10];
401
402 reg0x08 = stv0299_readreg (state, 0x08);
403 reg0x0c = stv0299_readreg (state, 0x0c);
404 reg0x0c &= 0x0f;
405 stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
406 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
407 lv_mask = 0x10;
408
409 cmd = cmd << 1;
410 if (debug_legacy_dish_switch)
411 printk ("%s switch command: 0x%04lx\n",__func__, cmd);
412
413 nexttime = ktime_get_boottime();
414 if (debug_legacy_dish_switch)
415 tv[0] = nexttime;
416 stv0299_writeregI (state, 0x0c, reg0x0c | 0x50);
417
418 dvb_frontend_sleep_until(&nexttime, 32000);
419
420 for (i=0; i<9; i++) {
421 if (debug_legacy_dish_switch)
422 tv[i+1] = ktime_get_boottime();
423 if((cmd & 0x01) != last) {
424
425 stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
426 last = (last) ? 0 : 1;
427 }
428
429 cmd = cmd >> 1;
430
431 if (i != 8)
432 dvb_frontend_sleep_until(&nexttime, 8000);
433 }
434 if (debug_legacy_dish_switch) {
435 printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
436 __func__, fe->dvb->num);
437 for (i = 1; i < 10; i++)
438 printk("%d: %d\n", i,
439 (int) ktime_us_delta(tv[i], tv[i-1]));
440 }
441
442 return 0;
443}
444
445static int stv0299_init (struct dvb_frontend* fe)
446{
447 struct stv0299_state* state = fe->demodulator_priv;
448 int i;
449 u8 reg;
450 u8 val;
451
452 dprintk("stv0299: init chip\n");
453
454 stv0299_writeregI(state, 0x02, 0x30 | state->mcr_reg);
455 msleep(50);
456
457 for (i = 0; ; i += 2) {
458 reg = state->config->inittab[i];
459 val = state->config->inittab[i+1];
460 if (reg == 0xff && val == 0xff)
461 break;
462 if (reg == 0x0c && state->config->op0_off)
463 val &= ~0x10;
464 if (reg == 0x2)
465 state->mcr_reg = val & 0xf;
466 stv0299_writeregI(state, reg, val);
467 }
468
469 return 0;
470}
471
472static int stv0299_read_status(struct dvb_frontend *fe,
473 enum fe_status *status)
474{
475 struct stv0299_state* state = fe->demodulator_priv;
476
477 u8 signal = 0xff - stv0299_readreg (state, 0x18);
478 u8 sync = stv0299_readreg (state, 0x1b);
479
480 dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
481 *status = 0;
482
483 if (signal > 10)
484 *status |= FE_HAS_SIGNAL;
485
486 if (sync & 0x80)
487 *status |= FE_HAS_CARRIER;
488
489 if (sync & 0x10)
490 *status |= FE_HAS_VITERBI;
491
492 if (sync & 0x08)
493 *status |= FE_HAS_SYNC;
494
495 if ((sync & 0x98) == 0x98)
496 *status |= FE_HAS_LOCK;
497
498 return 0;
499}
500
501static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)
502{
503 struct stv0299_state* state = fe->demodulator_priv;
504
505 if (state->errmode != STATUS_BER)
506 return -ENOSYS;
507
508 *ber = stv0299_readreg(state, 0x1e) | (stv0299_readreg(state, 0x1d) << 8);
509
510 return 0;
511}
512
513static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)
514{
515 struct stv0299_state* state = fe->demodulator_priv;
516
517 s32 signal = 0xffff - ((stv0299_readreg (state, 0x18) << 8)
518 | stv0299_readreg (state, 0x19));
519
520 dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __func__,
521 stv0299_readreg (state, 0x18),
522 stv0299_readreg (state, 0x19), (int) signal);
523
524 signal = signal * 5 / 4;
525 *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
526
527 return 0;
528}
529
530static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)
531{
532 struct stv0299_state* state = fe->demodulator_priv;
533
534 s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)
535 | stv0299_readreg (state, 0x25));
536 xsnr = 3 * (xsnr - 0xa100);
537 *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
538
539 return 0;
540}
541
542static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
543{
544 struct stv0299_state* state = fe->demodulator_priv;
545
546 if (state->errmode != STATUS_UCBLOCKS)
547 return -ENOSYS;
548
549 state->ucblocks += stv0299_readreg(state, 0x1e);
550 state->ucblocks += (stv0299_readreg(state, 0x1d) << 8);
551 *ucblocks = state->ucblocks;
552
553 return 0;
554}
555
556static int stv0299_set_frontend(struct dvb_frontend *fe)
557{
558 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
559 struct stv0299_state* state = fe->demodulator_priv;
560 int invval = 0;
561
562 dprintk ("%s : FE_SET_FRONTEND\n", __func__);
563 if (state->config->set_ts_params)
564 state->config->set_ts_params(fe, 0);
565
566
567 if (p->inversion == INVERSION_OFF) invval = 0;
568 else if (p->inversion == INVERSION_ON) invval = 1;
569 else {
570 printk("stv0299 does not support auto-inversion\n");
571 return -EINVAL;
572 }
573 if (state->config->invert) invval = (~invval) & 1;
574 stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);
575
576 if (fe->ops.tuner_ops.set_params) {
577 fe->ops.tuner_ops.set_params(fe);
578 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
579 }
580
581 stv0299_set_FEC(state, p->fec_inner);
582 stv0299_set_symbolrate(fe, p->symbol_rate);
583 stv0299_writeregI(state, 0x22, 0x00);
584 stv0299_writeregI(state, 0x23, 0x00);
585
586 state->tuner_frequency = p->frequency;
587 state->fec_inner = p->fec_inner;
588 state->symbol_rate = p->symbol_rate;
589
590 return 0;
591}
592
593static int stv0299_get_frontend(struct dvb_frontend *fe,
594 struct dtv_frontend_properties *p)
595{
596 struct stv0299_state* state = fe->demodulator_priv;
597 s32 derot_freq;
598 int invval;
599
600 derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)
601 | stv0299_readreg (state, 0x23));
602
603 derot_freq *= (state->config->mclk >> 16);
604 derot_freq += 500;
605 derot_freq /= 1000;
606
607 p->frequency += derot_freq;
608
609 invval = stv0299_readreg (state, 0x0c) & 1;
610 if (state->config->invert) invval = (~invval) & 1;
611 p->inversion = invval ? INVERSION_ON : INVERSION_OFF;
612
613 p->fec_inner = stv0299_get_fec(state);
614 p->symbol_rate = stv0299_get_symbolrate(state);
615
616 return 0;
617}
618
619static int stv0299_sleep(struct dvb_frontend* fe)
620{
621 struct stv0299_state* state = fe->demodulator_priv;
622
623 stv0299_writeregI(state, 0x02, 0xb0 | state->mcr_reg);
624 state->initialised = 0;
625
626 return 0;
627}
628
629static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
630{
631 struct stv0299_state* state = fe->demodulator_priv;
632
633 if (enable) {
634 stv0299_writeregI(state, 0x05, 0xb5);
635 } else {
636 stv0299_writeregI(state, 0x05, 0x35);
637 }
638 udelay(1);
639 return 0;
640}
641
642static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
643{
644 struct stv0299_state* state = fe->demodulator_priv;
645 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
646
647 fesettings->min_delay_ms = state->config->min_delay_ms;
648 if (p->symbol_rate < 10000000) {
649 fesettings->step_size = p->symbol_rate / 32000;
650 fesettings->max_drift = 5000;
651 } else {
652 fesettings->step_size = p->symbol_rate / 16000;
653 fesettings->max_drift = p->symbol_rate / 2000;
654 }
655 return 0;
656}
657
658static void stv0299_release(struct dvb_frontend* fe)
659{
660 struct stv0299_state* state = fe->demodulator_priv;
661 kfree(state);
662}
663
664static const struct dvb_frontend_ops stv0299_ops;
665
666struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,
667 struct i2c_adapter* i2c)
668{
669 struct stv0299_state* state = NULL;
670 int id;
671
672
673 state = kzalloc(sizeof(struct stv0299_state), GFP_KERNEL);
674 if (state == NULL) goto error;
675
676
677 state->config = config;
678 state->i2c = i2c;
679 state->initialised = 0;
680 state->tuner_frequency = 0;
681 state->symbol_rate = 0;
682 state->fec_inner = 0;
683 state->errmode = STATUS_BER;
684
685
686 stv0299_writeregI(state, 0x02, 0x30);
687 msleep(200);
688 id = stv0299_readreg(state, 0x00);
689
690
691
692 if (id != 0xa1 && id != 0x80) goto error;
693
694
695 memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));
696 state->frontend.demodulator_priv = state;
697 return &state->frontend;
698
699error:
700 kfree(state);
701 return NULL;
702}
703
704static const struct dvb_frontend_ops stv0299_ops = {
705 .delsys = { SYS_DVBS },
706 .info = {
707 .name = "ST STV0299 DVB-S",
708 .frequency_min_hz = 950 * MHz,
709 .frequency_max_hz = 2150 * MHz,
710 .frequency_stepsize_hz = 125 * kHz,
711 .symbol_rate_min = 1000000,
712 .symbol_rate_max = 45000000,
713 .symbol_rate_tolerance = 500,
714 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
715 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
716 FE_CAN_QPSK |
717 FE_CAN_FEC_AUTO
718 },
719
720 .release = stv0299_release,
721
722 .init = stv0299_init,
723 .sleep = stv0299_sleep,
724 .write = stv0299_write,
725 .i2c_gate_ctrl = stv0299_i2c_gate_ctrl,
726
727 .set_frontend = stv0299_set_frontend,
728 .get_frontend = stv0299_get_frontend,
729 .get_tune_settings = stv0299_get_tune_settings,
730
731 .read_status = stv0299_read_status,
732 .read_ber = stv0299_read_ber,
733 .read_signal_strength = stv0299_read_signal_strength,
734 .read_snr = stv0299_read_snr,
735 .read_ucblocks = stv0299_read_ucblocks,
736
737 .diseqc_send_master_cmd = stv0299_send_diseqc_msg,
738 .diseqc_send_burst = stv0299_send_diseqc_burst,
739 .set_tone = stv0299_set_tone,
740 .set_voltage = stv0299_set_voltage,
741 .dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
742};
743
744module_param(debug_legacy_dish_switch, int, 0444);
745MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");
746
747module_param(debug, int, 0644);
748MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
749
750MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");
751MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, Andreas Oberritter, Andrew de Quincey, Kenneth Aafly");
752MODULE_LICENSE("GPL");
753
754EXPORT_SYMBOL(stv0299_attach);
755
