1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
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 const enum fe_code_rate fec_tab[] = {
165 FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_1_2
166 };
167 u8 index;
168
169 dprintk ("%s\n", __func__);
170
171 index = stv0299_readreg (state, 0x1b);
172 index &= 0x7;
173
174 if (index > 4)
175 return FEC_AUTO;
176
177 return fec_tab [index];
178}
179
180static int stv0299_wait_diseqc_fifo (struct stv0299_state* state, int timeout)
181{
182 unsigned long start = jiffies;
183
184 dprintk ("%s\n", __func__);
185
186 while (stv0299_readreg(state, 0x0a) & 1) {
187 if (time_is_before_jiffies(start + timeout)) {
188 dprintk ("%s: timeout!!\n", __func__);
189 return -ETIMEDOUT;
190 }
191 msleep(10);
192 }
193
194 return 0;
195}
196
197static int stv0299_wait_diseqc_idle (struct stv0299_state* state, int timeout)
198{
199 unsigned long start = jiffies;
200
201 dprintk ("%s\n", __func__);
202
203 while ((stv0299_readreg(state, 0x0a) & 3) != 2 ) {
204 if (time_is_before_jiffies(start + timeout)) {
205 dprintk ("%s: timeout!!\n", __func__);
206 return -ETIMEDOUT;
207 }
208 msleep(10);
209 }
210
211 return 0;
212}
213
214static int stv0299_set_symbolrate (struct dvb_frontend* fe, u32 srate)
215{
216 struct stv0299_state* state = fe->demodulator_priv;
217 u64 big = srate;
218 u32 ratio;
219
220
221 if ((srate < 1000000) || (srate > 45000000)) return -EINVAL;
222
223
224 big = big << 20;
225 big += (state->config->mclk-1);
226 do_div(big, state->config->mclk);
227 ratio = big << 4;
228
229 return state->config->set_symbol_rate(fe, srate, ratio);
230}
231
232static int stv0299_get_symbolrate (struct stv0299_state* state)
233{
234 u32 Mclk = state->config->mclk / 4096L;
235 u32 srate;
236 s32 offset;
237 u8 sfr[3];
238 s8 rtf;
239
240 dprintk ("%s\n", __func__);
241
242 stv0299_readregs (state, 0x1f, sfr, 3);
243 stv0299_readregs (state, 0x1a, (u8 *)&rtf, 1);
244
245 srate = (sfr[0] << 8) | sfr[1];
246 srate *= Mclk;
247 srate /= 16;
248 srate += (sfr[2] >> 4) * Mclk / 256;
249 offset = (s32) rtf * (srate / 4096L);
250 offset /= 128;
251
252 dprintk ("%s : srate = %i\n", __func__, srate);
253 dprintk ("%s : ofset = %i\n", __func__, offset);
254
255 srate += offset;
256
257 srate += 1000;
258 srate /= 2000;
259 srate *= 2000;
260
261 return srate;
262}
263
264static int stv0299_send_diseqc_msg (struct dvb_frontend* fe,
265 struct dvb_diseqc_master_cmd *m)
266{
267 struct stv0299_state* state = fe->demodulator_priv;
268 u8 val;
269 int i;
270
271 dprintk ("%s\n", __func__);
272
273 if (stv0299_wait_diseqc_idle (state, 100) < 0)
274 return -ETIMEDOUT;
275
276 val = stv0299_readreg (state, 0x08);
277
278 if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x6))
279 return -EREMOTEIO;
280
281 for (i=0; i<m->msg_len; i++) {
282 if (stv0299_wait_diseqc_fifo (state, 100) < 0)
283 return -ETIMEDOUT;
284
285 if (stv0299_writeregI (state, 0x09, m->msg[i]))
286 return -EREMOTEIO;
287 }
288
289 if (stv0299_wait_diseqc_idle (state, 100) < 0)
290 return -ETIMEDOUT;
291
292 return 0;
293}
294
295static int stv0299_send_diseqc_burst(struct dvb_frontend *fe,
296 enum fe_sec_mini_cmd burst)
297{
298 struct stv0299_state* state = fe->demodulator_priv;
299 u8 val;
300
301 dprintk ("%s\n", __func__);
302
303 if (stv0299_wait_diseqc_idle (state, 100) < 0)
304 return -ETIMEDOUT;
305
306 val = stv0299_readreg (state, 0x08);
307
308 if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x2))
309 return -EREMOTEIO;
310
311 if (stv0299_writeregI (state, 0x09, burst == SEC_MINI_A ? 0x00 : 0xff))
312 return -EREMOTEIO;
313
314 if (stv0299_wait_diseqc_idle (state, 100) < 0)
315 return -ETIMEDOUT;
316
317 if (stv0299_writeregI (state, 0x08, val))
318 return -EREMOTEIO;
319
320 return 0;
321}
322
323static int stv0299_set_tone(struct dvb_frontend *fe,
324 enum fe_sec_tone_mode tone)
325{
326 struct stv0299_state* state = fe->demodulator_priv;
327 u8 val;
328
329 if (stv0299_wait_diseqc_idle (state, 100) < 0)
330 return -ETIMEDOUT;
331
332 val = stv0299_readreg (state, 0x08);
333
334 switch (tone) {
335 case SEC_TONE_ON:
336 return stv0299_writeregI (state, 0x08, val | 0x3);
337
338 case SEC_TONE_OFF:
339 return stv0299_writeregI (state, 0x08, (val & ~0x3) | 0x02);
340
341 default:
342 return -EINVAL;
343 }
344}
345
346static int stv0299_set_voltage(struct dvb_frontend *fe,
347 enum fe_sec_voltage voltage)
348{
349 struct stv0299_state* state = fe->demodulator_priv;
350 u8 reg0x08;
351 u8 reg0x0c;
352
353 dprintk("%s: %s\n", __func__,
354 voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
355 voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
356
357 reg0x08 = stv0299_readreg (state, 0x08);
358 reg0x0c = stv0299_readreg (state, 0x0c);
359
360
361
362
363 reg0x0c &= 0x0f;
364 reg0x08 = (reg0x08 & 0x3f) | (state->config->lock_output << 6);
365
366 switch (voltage) {
367 case SEC_VOLTAGE_13:
368 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
369 reg0x0c |= 0x10;
370 else
371 reg0x0c |= 0x40;
372 break;
373 case SEC_VOLTAGE_18:
374 reg0x0c |= 0x50;
375 break;
376 case SEC_VOLTAGE_OFF:
377
378 reg0x08 = 0x00;
379 reg0x0c = 0x00;
380 break;
381 default:
382 return -EINVAL;
383 }
384
385 if (state->config->op0_off)
386 reg0x0c &= ~0x10;
387
388 stv0299_writeregI(state, 0x08, reg0x08);
389 return stv0299_writeregI(state, 0x0c, reg0x0c);
390}
391
392static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd)
393{
394 struct stv0299_state* state = fe->demodulator_priv;
395 u8 reg0x08;
396 u8 reg0x0c;
397 u8 lv_mask = 0x40;
398 u8 last = 1;
399 int i;
400 ktime_t nexttime;
401 ktime_t tv[10];
402
403 reg0x08 = stv0299_readreg (state, 0x08);
404 reg0x0c = stv0299_readreg (state, 0x0c);
405 reg0x0c &= 0x0f;
406 stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
407 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
408 lv_mask = 0x10;
409
410 cmd = cmd << 1;
411 if (debug_legacy_dish_switch)
412 printk ("%s switch command: 0x%04lx\n",__func__, cmd);
413
414 nexttime = ktime_get_boottime();
415 if (debug_legacy_dish_switch)
416 tv[0] = nexttime;
417 stv0299_writeregI (state, 0x0c, reg0x0c | 0x50);
418
419 dvb_frontend_sleep_until(&nexttime, 32000);
420
421 for (i=0; i<9; i++) {
422 if (debug_legacy_dish_switch)
423 tv[i+1] = ktime_get_boottime();
424 if((cmd & 0x01) != last) {
425
426 stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
427 last = (last) ? 0 : 1;
428 }
429
430 cmd = cmd >> 1;
431
432 if (i != 8)
433 dvb_frontend_sleep_until(&nexttime, 8000);
434 }
435 if (debug_legacy_dish_switch) {
436 printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
437 __func__, fe->dvb->num);
438 for (i = 1; i < 10; i++)
439 printk("%d: %d\n", i,
440 (int) ktime_us_delta(tv[i], tv[i-1]));
441 }
442
443 return 0;
444}
445
446static int stv0299_init (struct dvb_frontend* fe)
447{
448 struct stv0299_state* state = fe->demodulator_priv;
449 int i;
450 u8 reg;
451 u8 val;
452
453 dprintk("stv0299: init chip\n");
454
455 stv0299_writeregI(state, 0x02, 0x30 | state->mcr_reg);
456 msleep(50);
457
458 for (i = 0; ; i += 2) {
459 reg = state->config->inittab[i];
460 val = state->config->inittab[i+1];
461 if (reg == 0xff && val == 0xff)
462 break;
463 if (reg == 0x0c && state->config->op0_off)
464 val &= ~0x10;
465 if (reg == 0x2)
466 state->mcr_reg = val & 0xf;
467 stv0299_writeregI(state, reg, val);
468 }
469
470 return 0;
471}
472
473static int stv0299_read_status(struct dvb_frontend *fe,
474 enum fe_status *status)
475{
476 struct stv0299_state* state = fe->demodulator_priv;
477
478 u8 signal = 0xff - stv0299_readreg (state, 0x18);
479 u8 sync = stv0299_readreg (state, 0x1b);
480
481 dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
482 *status = 0;
483
484 if (signal > 10)
485 *status |= FE_HAS_SIGNAL;
486
487 if (sync & 0x80)
488 *status |= FE_HAS_CARRIER;
489
490 if (sync & 0x10)
491 *status |= FE_HAS_VITERBI;
492
493 if (sync & 0x08)
494 *status |= FE_HAS_SYNC;
495
496 if ((sync & 0x98) == 0x98)
497 *status |= FE_HAS_LOCK;
498
499 return 0;
500}
501
502static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)
503{
504 struct stv0299_state* state = fe->demodulator_priv;
505
506 if (state->errmode != STATUS_BER)
507 return -ENOSYS;
508
509 *ber = stv0299_readreg(state, 0x1e) | (stv0299_readreg(state, 0x1d) << 8);
510
511 return 0;
512}
513
514static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)
515{
516 struct stv0299_state* state = fe->demodulator_priv;
517
518 s32 signal = 0xffff - ((stv0299_readreg (state, 0x18) << 8)
519 | stv0299_readreg (state, 0x19));
520
521 dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __func__,
522 stv0299_readreg (state, 0x18),
523 stv0299_readreg (state, 0x19), (int) signal);
524
525 signal = signal * 5 / 4;
526 *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
527
528 return 0;
529}
530
531static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)
532{
533 struct stv0299_state* state = fe->demodulator_priv;
534
535 s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)
536 | stv0299_readreg (state, 0x25));
537 xsnr = 3 * (xsnr - 0xa100);
538 *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
539
540 return 0;
541}
542
543static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
544{
545 struct stv0299_state* state = fe->demodulator_priv;
546
547 if (state->errmode != STATUS_UCBLOCKS)
548 return -ENOSYS;
549
550 state->ucblocks += stv0299_readreg(state, 0x1e);
551 state->ucblocks += (stv0299_readreg(state, 0x1d) << 8);
552 *ucblocks = state->ucblocks;
553
554 return 0;
555}
556
557static int stv0299_set_frontend(struct dvb_frontend *fe)
558{
559 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
560 struct stv0299_state* state = fe->demodulator_priv;
561 int invval = 0;
562
563 dprintk ("%s : FE_SET_FRONTEND\n", __func__);
564 if (state->config->set_ts_params)
565 state->config->set_ts_params(fe, 0);
566
567
568 if (p->inversion == INVERSION_OFF) invval = 0;
569 else if (p->inversion == INVERSION_ON) invval = 1;
570 else {
571 printk("stv0299 does not support auto-inversion\n");
572 return -EINVAL;
573 }
574 if (state->config->invert) invval = (~invval) & 1;
575 stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);
576
577 if (fe->ops.tuner_ops.set_params) {
578 fe->ops.tuner_ops.set_params(fe);
579 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
580 }
581
582 stv0299_set_FEC(state, p->fec_inner);
583 stv0299_set_symbolrate(fe, p->symbol_rate);
584 stv0299_writeregI(state, 0x22, 0x00);
585 stv0299_writeregI(state, 0x23, 0x00);
586
587 state->tuner_frequency = p->frequency;
588 state->fec_inner = p->fec_inner;
589 state->symbol_rate = p->symbol_rate;
590
591 return 0;
592}
593
594static int stv0299_get_frontend(struct dvb_frontend *fe,
595 struct dtv_frontend_properties *p)
596{
597 struct stv0299_state* state = fe->demodulator_priv;
598 s32 derot_freq;
599 int invval;
600
601 derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)
602 | stv0299_readreg (state, 0x23));
603
604 derot_freq *= (state->config->mclk >> 16);
605 derot_freq += 500;
606 derot_freq /= 1000;
607
608 p->frequency += derot_freq;
609
610 invval = stv0299_readreg (state, 0x0c) & 1;
611 if (state->config->invert) invval = (~invval) & 1;
612 p->inversion = invval ? INVERSION_ON : INVERSION_OFF;
613
614 p->fec_inner = stv0299_get_fec(state);
615 p->symbol_rate = stv0299_get_symbolrate(state);
616
617 return 0;
618}
619
620static int stv0299_sleep(struct dvb_frontend* fe)
621{
622 struct stv0299_state* state = fe->demodulator_priv;
623
624 stv0299_writeregI(state, 0x02, 0xb0 | state->mcr_reg);
625 state->initialised = 0;
626
627 return 0;
628}
629
630static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
631{
632 struct stv0299_state* state = fe->demodulator_priv;
633
634 if (enable) {
635 stv0299_writeregI(state, 0x05, 0xb5);
636 } else {
637 stv0299_writeregI(state, 0x05, 0x35);
638 }
639 udelay(1);
640 return 0;
641}
642
643static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
644{
645 struct stv0299_state* state = fe->demodulator_priv;
646 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
647
648 fesettings->min_delay_ms = state->config->min_delay_ms;
649 if (p->symbol_rate < 10000000) {
650 fesettings->step_size = p->symbol_rate / 32000;
651 fesettings->max_drift = 5000;
652 } else {
653 fesettings->step_size = p->symbol_rate / 16000;
654 fesettings->max_drift = p->symbol_rate / 2000;
655 }
656 return 0;
657}
658
659static void stv0299_release(struct dvb_frontend* fe)
660{
661 struct stv0299_state* state = fe->demodulator_priv;
662 kfree(state);
663}
664
665static const struct dvb_frontend_ops stv0299_ops;
666
667struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,
668 struct i2c_adapter* i2c)
669{
670 struct stv0299_state* state = NULL;
671 int id;
672
673
674 state = kzalloc(sizeof(struct stv0299_state), GFP_KERNEL);
675 if (state == NULL) goto error;
676
677
678 state->config = config;
679 state->i2c = i2c;
680 state->initialised = 0;
681 state->tuner_frequency = 0;
682 state->symbol_rate = 0;
683 state->fec_inner = 0;
684 state->errmode = STATUS_BER;
685
686
687 stv0299_writeregI(state, 0x02, 0x30);
688 msleep(200);
689 id = stv0299_readreg(state, 0x00);
690
691
692
693 if (id != 0xa1 && id != 0x80) goto error;
694
695
696 memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));
697 state->frontend.demodulator_priv = state;
698 return &state->frontend;
699
700error:
701 kfree(state);
702 return NULL;
703}
704
705static const struct dvb_frontend_ops stv0299_ops = {
706 .delsys = { SYS_DVBS },
707 .info = {
708 .name = "ST STV0299 DVB-S",
709 .frequency_min_hz = 950 * MHz,
710 .frequency_max_hz = 2150 * MHz,
711 .frequency_stepsize_hz = 125 * kHz,
712 .symbol_rate_min = 1000000,
713 .symbol_rate_max = 45000000,
714 .symbol_rate_tolerance = 500,
715 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
716 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
717 FE_CAN_QPSK |
718 FE_CAN_FEC_AUTO
719 },
720
721 .release = stv0299_release,
722
723 .init = stv0299_init,
724 .sleep = stv0299_sleep,
725 .write = stv0299_write,
726 .i2c_gate_ctrl = stv0299_i2c_gate_ctrl,
727
728 .set_frontend = stv0299_set_frontend,
729 .get_frontend = stv0299_get_frontend,
730 .get_tune_settings = stv0299_get_tune_settings,
731
732 .read_status = stv0299_read_status,
733 .read_ber = stv0299_read_ber,
734 .read_signal_strength = stv0299_read_signal_strength,
735 .read_snr = stv0299_read_snr,
736 .read_ucblocks = stv0299_read_ucblocks,
737
738 .diseqc_send_master_cmd = stv0299_send_diseqc_msg,
739 .diseqc_send_burst = stv0299_send_diseqc_burst,
740 .set_tone = stv0299_set_tone,
741 .set_voltage = stv0299_set_voltage,
742 .dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
743};
744
745module_param(debug_legacy_dish_switch, int, 0444);
746MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");
747
748module_param(debug, int, 0644);
749MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
750
751MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");
752MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, Andreas Oberritter, Andrew de Quincey, Kenneth Aafly");
753MODULE_LICENSE("GPL");
754
755EXPORT_SYMBOL(stv0299_attach);
756
