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22#include <linux/init.h>
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/string.h>
26#include <linux/slab.h>
27
28#include "dvb_frontend.h"
29#include "nxt6000_priv.h"
30#include "nxt6000.h"
31
32
33
34struct nxt6000_state {
35 struct i2c_adapter* i2c;
36
37 const struct nxt6000_config* config;
38 struct dvb_frontend frontend;
39};
40
41static int debug;
42#define dprintk if (debug) printk
43
44static int nxt6000_writereg(struct nxt6000_state* state, u8 reg, u8 data)
45{
46 u8 buf[] = { reg, data };
47 struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 };
48 int ret;
49
50 if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1)
51 dprintk("nxt6000: nxt6000_write error (reg: 0x%02X, data: 0x%02X, ret: %d)\n", reg, data, ret);
52
53 return (ret != 1) ? -EIO : 0;
54}
55
56static u8 nxt6000_readreg(struct nxt6000_state* state, u8 reg)
57{
58 int ret;
59 u8 b0[] = { reg };
60 u8 b1[] = { 0 };
61 struct i2c_msg msgs[] = {
62 {.addr = state->config->demod_address,.flags = 0,.buf = b0,.len = 1},
63 {.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b1,.len = 1}
64 };
65
66 ret = i2c_transfer(state->i2c, msgs, 2);
67
68 if (ret != 2)
69 dprintk("nxt6000: nxt6000_read error (reg: 0x%02X, ret: %d)\n", reg, ret);
70
71 return b1[0];
72}
73
74static void nxt6000_reset(struct nxt6000_state* state)
75{
76 u8 val;
77
78 val = nxt6000_readreg(state, OFDM_COR_CTL);
79
80 nxt6000_writereg(state, OFDM_COR_CTL, val & ~COREACT);
81 nxt6000_writereg(state, OFDM_COR_CTL, val | COREACT);
82}
83
84static int nxt6000_set_bandwidth(struct nxt6000_state *state, u32 bandwidth)
85{
86 u16 nominal_rate;
87 int result;
88
89 switch (bandwidth) {
90 case 6000000:
91 nominal_rate = 0x55B7;
92 break;
93
94 case 7000000:
95 nominal_rate = 0x6400;
96 break;
97
98 case 8000000:
99 nominal_rate = 0x7249;
100 break;
101
102 default:
103 return -EINVAL;
104 }
105
106 if ((result = nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, nominal_rate & 0xFF)) < 0)
107 return result;
108
109 return nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, (nominal_rate >> 8) & 0xFF);
110}
111
112static int nxt6000_set_guard_interval(struct nxt6000_state* state, fe_guard_interval_t guard_interval)
113{
114 switch (guard_interval) {
115
116 case GUARD_INTERVAL_1_32:
117 return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x00 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
118
119 case GUARD_INTERVAL_1_16:
120 return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x01 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
121
122 case GUARD_INTERVAL_AUTO:
123 case GUARD_INTERVAL_1_8:
124 return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x02 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
125
126 case GUARD_INTERVAL_1_4:
127 return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x03 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
128
129 default:
130 return -EINVAL;
131 }
132}
133
134static int nxt6000_set_inversion(struct nxt6000_state* state, fe_spectral_inversion_t inversion)
135{
136 switch (inversion) {
137
138 case INVERSION_OFF:
139 return nxt6000_writereg(state, OFDM_ITB_CTL, 0x00);
140
141 case INVERSION_ON:
142 return nxt6000_writereg(state, OFDM_ITB_CTL, ITBINV);
143
144 default:
145 return -EINVAL;
146
147 }
148}
149
150static int nxt6000_set_transmission_mode(struct nxt6000_state* state, fe_transmit_mode_t transmission_mode)
151{
152 int result;
153
154 switch (transmission_mode) {
155
156 case TRANSMISSION_MODE_2K:
157 if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x00 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
158 return result;
159
160 return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x00 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
161
162 case TRANSMISSION_MODE_8K:
163 case TRANSMISSION_MODE_AUTO:
164 if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x02 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
165 return result;
166
167 return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x01 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
168
169 default:
170 return -EINVAL;
171
172 }
173}
174
175static void nxt6000_setup(struct dvb_frontend* fe)
176{
177 struct nxt6000_state* state = fe->demodulator_priv;
178
179 nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM);
180 nxt6000_writereg(state, BER_CTRL, (0x01 << 1) | 0x01);
181 nxt6000_writereg(state, VIT_BERTIME_2, 0x00);
182 nxt6000_writereg(state, VIT_BERTIME_1, 0x02);
183 nxt6000_writereg(state, VIT_BERTIME_0, 0x00);
184 nxt6000_writereg(state, VIT_COR_INTEN, 0x98);
185 nxt6000_writereg(state, VIT_COR_CTL, 0x82);
186 nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC | 0x02 );
187 nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) | (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F));
188 nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K | 0x02);
189 nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST | INITIAL_AGC_BW);
190 nxt6000_writereg(state, OFDM_ITB_FREQ_1, 0x06);
191 nxt6000_writereg(state, OFDM_ITB_FREQ_2, 0x31);
192 nxt6000_writereg(state, OFDM_CAS_CTL, (0x01 << 7) | (0x02 << 3) | 0x04);
193 nxt6000_writereg(state, CAS_FREQ, 0xBB);
194 nxt6000_writereg(state, OFDM_SYR_CTL, 1 << 2);
195 nxt6000_writereg(state, OFDM_PPM_CTL_1, PPM256);
196 nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, 0x49);
197 nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, 0x72);
198 nxt6000_writereg(state, ANALOG_CONTROL_0, 1 << 5);
199 nxt6000_writereg(state, EN_DMD_RACQ, (1 << 7) | (3 << 4) | 2);
200 nxt6000_writereg(state, DIAG_CONFIG, TB_SET);
201
202 if (state->config->clock_inversion)
203 nxt6000_writereg(state, SUB_DIAG_MODE_SEL, CLKINVERSION);
204 else
205 nxt6000_writereg(state, SUB_DIAG_MODE_SEL, 0);
206
207 nxt6000_writereg(state, TS_FORMAT, 0);
208}
209
210static void nxt6000_dump_status(struct nxt6000_state *state)
211{
212 u8 val;
213
214
215
216
217
218
219
220
221
222
223
224
225
226 printk("NXT6000 status:");
227
228 val = nxt6000_readreg(state, RS_COR_STAT);
229
230 printk(" DATA DESCR LOCK: %d,", val & 0x01);
231 printk(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01);
232
233 val = nxt6000_readreg(state, VIT_SYNC_STATUS);
234
235 printk(" VITERBI LOCK: %d,", (val >> 7) & 0x01);
236
237 switch ((val >> 4) & 0x07) {
238
239 case 0x00:
240 printk(" VITERBI CODERATE: 1/2,");
241 break;
242
243 case 0x01:
244 printk(" VITERBI CODERATE: 2/3,");
245 break;
246
247 case 0x02:
248 printk(" VITERBI CODERATE: 3/4,");
249 break;
250
251 case 0x03:
252 printk(" VITERBI CODERATE: 5/6,");
253 break;
254
255 case 0x04:
256 printk(" VITERBI CODERATE: 7/8,");
257 break;
258
259 default:
260 printk(" VITERBI CODERATE: Reserved,");
261
262 }
263
264 val = nxt6000_readreg(state, OFDM_COR_STAT);
265
266 printk(" CHCTrack: %d,", (val >> 7) & 0x01);
267 printk(" TPSLock: %d,", (val >> 6) & 0x01);
268 printk(" SYRLock: %d,", (val >> 5) & 0x01);
269 printk(" AGCLock: %d,", (val >> 4) & 0x01);
270
271 switch (val & 0x0F) {
272
273 case 0x00:
274 printk(" CoreState: IDLE,");
275 break;
276
277 case 0x02:
278 printk(" CoreState: WAIT_AGC,");
279 break;
280
281 case 0x03:
282 printk(" CoreState: WAIT_SYR,");
283 break;
284
285 case 0x04:
286 printk(" CoreState: WAIT_PPM,");
287 break;
288
289 case 0x01:
290 printk(" CoreState: WAIT_TRL,");
291 break;
292
293 case 0x05:
294 printk(" CoreState: WAIT_TPS,");
295 break;
296
297 case 0x06:
298 printk(" CoreState: MONITOR_TPS,");
299 break;
300
301 default:
302 printk(" CoreState: Reserved,");
303
304 }
305
306 val = nxt6000_readreg(state, OFDM_SYR_STAT);
307
308 printk(" SYRLock: %d,", (val >> 4) & 0x01);
309 printk(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K");
310
311 switch ((val >> 4) & 0x03) {
312
313 case 0x00:
314 printk(" SYRGuard: 1/32,");
315 break;
316
317 case 0x01:
318 printk(" SYRGuard: 1/16,");
319 break;
320
321 case 0x02:
322 printk(" SYRGuard: 1/8,");
323 break;
324
325 case 0x03:
326 printk(" SYRGuard: 1/4,");
327 break;
328 }
329
330 val = nxt6000_readreg(state, OFDM_TPS_RCVD_3);
331
332 switch ((val >> 4) & 0x07) {
333
334 case 0x00:
335 printk(" TPSLP: 1/2,");
336 break;
337
338 case 0x01:
339 printk(" TPSLP: 2/3,");
340 break;
341
342 case 0x02:
343 printk(" TPSLP: 3/4,");
344 break;
345
346 case 0x03:
347 printk(" TPSLP: 5/6,");
348 break;
349
350 case 0x04:
351 printk(" TPSLP: 7/8,");
352 break;
353
354 default:
355 printk(" TPSLP: Reserved,");
356
357 }
358
359 switch (val & 0x07) {
360
361 case 0x00:
362 printk(" TPSHP: 1/2,");
363 break;
364
365 case 0x01:
366 printk(" TPSHP: 2/3,");
367 break;
368
369 case 0x02:
370 printk(" TPSHP: 3/4,");
371 break;
372
373 case 0x03:
374 printk(" TPSHP: 5/6,");
375 break;
376
377 case 0x04:
378 printk(" TPSHP: 7/8,");
379 break;
380
381 default:
382 printk(" TPSHP: Reserved,");
383
384 }
385
386 val = nxt6000_readreg(state, OFDM_TPS_RCVD_4);
387
388 printk(" TPSMode: %s,", val & 0x01 ? "8K" : "2K");
389
390 switch ((val >> 4) & 0x03) {
391
392 case 0x00:
393 printk(" TPSGuard: 1/32,");
394 break;
395
396 case 0x01:
397 printk(" TPSGuard: 1/16,");
398 break;
399
400 case 0x02:
401 printk(" TPSGuard: 1/8,");
402 break;
403
404 case 0x03:
405 printk(" TPSGuard: 1/4,");
406 break;
407
408 }
409
410
411 nxt6000_readreg(state, RF_AGC_VAL_1);
412 val = nxt6000_readreg(state, RF_AGC_STATUS);
413 val = nxt6000_readreg(state, RF_AGC_STATUS);
414
415 printk(" RF AGC LOCK: %d,", (val >> 4) & 0x01);
416 printk("\n");
417}
418
419static int nxt6000_read_status(struct dvb_frontend* fe, fe_status_t* status)
420{
421 u8 core_status;
422 struct nxt6000_state* state = fe->demodulator_priv;
423
424 *status = 0;
425
426 core_status = nxt6000_readreg(state, OFDM_COR_STAT);
427
428 if (core_status & AGCLOCKED)
429 *status |= FE_HAS_SIGNAL;
430
431 if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK)
432 *status |= FE_HAS_CARRIER;
433
434 if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC)
435 *status |= FE_HAS_VITERBI;
436
437 if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS)
438 *status |= FE_HAS_SYNC;
439
440 if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)))
441 *status |= FE_HAS_LOCK;
442
443 if (debug)
444 nxt6000_dump_status(state);
445
446 return 0;
447}
448
449static int nxt6000_init(struct dvb_frontend* fe)
450{
451 struct nxt6000_state* state = fe->demodulator_priv;
452
453 nxt6000_reset(state);
454 nxt6000_setup(fe);
455
456 return 0;
457}
458
459static int nxt6000_set_frontend(struct dvb_frontend *fe)
460{
461 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
462 struct nxt6000_state* state = fe->demodulator_priv;
463 int result;
464
465 if (fe->ops.tuner_ops.set_params) {
466 fe->ops.tuner_ops.set_params(fe);
467 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
468 }
469
470 result = nxt6000_set_bandwidth(state, p->bandwidth_hz);
471 if (result < 0)
472 return result;
473
474 result = nxt6000_set_guard_interval(state, p->guard_interval);
475 if (result < 0)
476 return result;
477
478 result = nxt6000_set_transmission_mode(state, p->transmission_mode);
479 if (result < 0)
480 return result;
481
482 result = nxt6000_set_inversion(state, p->inversion);
483 if (result < 0)
484 return result;
485
486 msleep(500);
487 return 0;
488}
489
490static void nxt6000_release(struct dvb_frontend* fe)
491{
492 struct nxt6000_state* state = fe->demodulator_priv;
493 kfree(state);
494}
495
496static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr)
497{
498 struct nxt6000_state* state = fe->demodulator_priv;
499
500 *snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8;
501
502 return 0;
503}
504
505static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber)
506{
507 struct nxt6000_state* state = fe->demodulator_priv;
508
509 nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 );
510
511 *ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) |
512 nxt6000_readreg( state, VIT_BER_0 );
513
514 nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18);
515
516 return 0;
517}
518
519static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
520{
521 struct nxt6000_state* state = fe->demodulator_priv;
522
523 *signal_strength = (short) (511 -
524 (nxt6000_readreg(state, AGC_GAIN_1) +
525 ((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8)));
526
527 return 0;
528}
529
530static int nxt6000_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
531{
532 tune->min_delay_ms = 500;
533 return 0;
534}
535
536static int nxt6000_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
537{
538 struct nxt6000_state* state = fe->demodulator_priv;
539
540 if (enable) {
541 return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01);
542 } else {
543 return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00);
544 }
545}
546
547static struct dvb_frontend_ops nxt6000_ops;
548
549struct dvb_frontend* nxt6000_attach(const struct nxt6000_config* config,
550 struct i2c_adapter* i2c)
551{
552 struct nxt6000_state* state = NULL;
553
554
555 state = kzalloc(sizeof(struct nxt6000_state), GFP_KERNEL);
556 if (state == NULL) goto error;
557
558
559 state->config = config;
560 state->i2c = i2c;
561
562
563 if (nxt6000_readreg(state, OFDM_MSC_REV) != NXT6000ASICDEVICE) goto error;
564
565
566 memcpy(&state->frontend.ops, &nxt6000_ops, sizeof(struct dvb_frontend_ops));
567 state->frontend.demodulator_priv = state;
568 return &state->frontend;
569
570error:
571 kfree(state);
572 return NULL;
573}
574
575static struct dvb_frontend_ops nxt6000_ops = {
576 .delsys = { SYS_DVBT },
577 .info = {
578 .name = "NxtWave NXT6000 DVB-T",
579 .frequency_min = 0,
580 .frequency_max = 863250000,
581 .frequency_stepsize = 62500,
582
583 .symbol_rate_min = 0,
584 .symbol_rate_max = 9360000,
585 .symbol_rate_tolerance = 4000,
586 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
587 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
588 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
589 FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
590 FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
591 FE_CAN_HIERARCHY_AUTO,
592 },
593
594 .release = nxt6000_release,
595
596 .init = nxt6000_init,
597 .i2c_gate_ctrl = nxt6000_i2c_gate_ctrl,
598
599 .get_tune_settings = nxt6000_fe_get_tune_settings,
600
601 .set_frontend = nxt6000_set_frontend,
602
603 .read_status = nxt6000_read_status,
604 .read_ber = nxt6000_read_ber,
605 .read_signal_strength = nxt6000_read_signal_strength,
606 .read_snr = nxt6000_read_snr,
607};
608
609module_param(debug, int, 0644);
610MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
611
612MODULE_DESCRIPTION("NxtWave NXT6000 DVB-T demodulator driver");
613MODULE_AUTHOR("Florian Schirmer");
614MODULE_LICENSE("GPL");
615
616EXPORT_SYMBOL(nxt6000_attach);
617
