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Full support for Ginger Console
[linux-ginger.git] / drivers / media / dvb / frontends / zl10353.c
blob8c612719adfca35c81d01cfb78223559137d30b6
1 /*
2 * Driver for Zarlink DVB-T ZL10353 demodulator
3 *
4 * Copyright (C) 2006, 2007 Christopher Pascoe <c.pascoe@itee.uq.edu.au>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 *
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/delay.h>
26 #include <linux/string.h>
27 #include <linux/slab.h>
28 #include <asm/div64.h>
29
30 #include "dvb_frontend.h"
31 #include "zl10353_priv.h"
32 #include "zl10353.h"
33
34 struct zl10353_state {
35 struct i2c_adapter *i2c;
36 struct dvb_frontend frontend;
37
38 struct zl10353_config config;
39
40 enum fe_bandwidth bandwidth;
41 u32 ucblocks;
42 u32 frequency;
43 };
44
45 static int debug;
46 #define dprintk(args...) \
47 do { \
48 if (debug) printk(KERN_DEBUG "zl10353: " args); \
49 } while (0)
50
51 static int debug_regs;
52
53 static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
54 {
55 struct zl10353_state *state = fe->demodulator_priv;
56 u8 buf[2] = { reg, val };
57 struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,
58 .buf = buf, .len = 2 };
59 int err = i2c_transfer(state->i2c, &msg, 1);
60 if (err != 1) {
61 printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err);
62 return err;
63 }
64 return 0;
65 }
66
67 static int zl10353_write(struct dvb_frontend *fe, u8 *ibuf, int ilen)
68 {
69 int err, i;
70 for (i = 0; i < ilen - 1; i++)
71 if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1])))
72 return err;
73
74 return 0;
75 }
76
77 static int zl10353_read_register(struct zl10353_state *state, u8 reg)
78 {
79 int ret;
80 u8 b0[1] = { reg };
81 u8 b1[1] = { 0 };
82 struct i2c_msg msg[2] = { { .addr = state->config.demod_address,
83 .flags = 0,
84 .buf = b0, .len = 1 },
85 { .addr = state->config.demod_address,
86 .flags = I2C_M_RD,
87 .buf = b1, .len = 1 } };
88
89 ret = i2c_transfer(state->i2c, msg, 2);
90
91 if (ret != 2) {
92 printk("%s: readreg error (reg=%d, ret==%i)\n",
93 __func__, reg, ret);
94 return ret;
95 }
96
97 return b1[0];
98 }
99
100 static void zl10353_dump_regs(struct dvb_frontend *fe)
101 {
102 struct zl10353_state *state = fe->demodulator_priv;
103 int ret;
104 u8 reg;
105
106 /* Dump all registers. */
107 for (reg = 0; ; reg++) {
108 if (reg % 16 == 0) {
109 if (reg)
110 printk(KERN_CONT "\n");
111 printk(KERN_DEBUG "%02x:", reg);
112 }
113 ret = zl10353_read_register(state, reg);
114 if (ret >= 0)
115 printk(KERN_CONT " %02x", (u8)ret);
116 else
117 printk(KERN_CONT " --");
118 if (reg == 0xff)
119 break;
120 }
121 printk(KERN_CONT "\n");
122 }
123
124 static void zl10353_calc_nominal_rate(struct dvb_frontend *fe,
125 enum fe_bandwidth bandwidth,
126 u16 *nominal_rate)
127 {
128 struct zl10353_state *state = fe->demodulator_priv;
129 u32 adc_clock = 450560; /* 45.056 MHz */
130 u64 value;
131 u8 bw;
132
133 if (state->config.adc_clock)
134 adc_clock = state->config.adc_clock;
135
136 switch (bandwidth) {
137 case BANDWIDTH_6_MHZ:
138 bw = 6;
139 break;
140 case BANDWIDTH_7_MHZ:
141 bw = 7;
142 break;
143 case BANDWIDTH_8_MHZ:
144 default:
145 bw = 8;
146 break;
147 }
148
149 value = (u64)10 * (1 << 23) / 7 * 125;
150 value = (bw * value) + adc_clock / 2;
151 do_div(value, adc_clock);
152 *nominal_rate = value;
153
154 dprintk("%s: bw %d, adc_clock %d => 0x%x\n",
155 __func__, bw, adc_clock, *nominal_rate);
156 }
157
158 static void zl10353_calc_input_freq(struct dvb_frontend *fe,
159 u16 *input_freq)
160 {
161 struct zl10353_state *state = fe->demodulator_priv;
162 u32 adc_clock = 450560; /* 45.056 MHz */
163 int if2 = 361667; /* 36.1667 MHz */
164 int ife;
165 u64 value;
166
167 if (state->config.adc_clock)
168 adc_clock = state->config.adc_clock;
169 if (state->config.if2)
170 if2 = state->config.if2;
171
172 if (adc_clock >= if2 * 2)
173 ife = if2;
174 else {
175 ife = adc_clock - (if2 % adc_clock);
176 if (ife > adc_clock / 2)
177 ife = adc_clock - ife;
178 }
179 value = (u64)65536 * ife + adc_clock / 2;
180 do_div(value, adc_clock);
181 *input_freq = -value;
182
183 dprintk("%s: if2 %d, ife %d, adc_clock %d => %d / 0x%x\n",
184 __func__, if2, ife, adc_clock, -(int)value, *input_freq);
185 }
186
187 static int zl10353_sleep(struct dvb_frontend *fe)
188 {
189 static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
190
191 zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown));
192 return 0;
193 }
194
195 static int zl10353_set_parameters(struct dvb_frontend *fe,
196 struct dvb_frontend_parameters *param)
197 {
198 struct zl10353_state *state = fe->demodulator_priv;
199 u16 nominal_rate, input_freq;
200 u8 pllbuf[6] = { 0x67 }, acq_ctl = 0;
201 u16 tps = 0;
202 struct dvb_ofdm_parameters *op = &param->u.ofdm;
203
204 state->frequency = param->frequency;
205
206 zl10353_single_write(fe, RESET, 0x80);
207 udelay(200);
208 zl10353_single_write(fe, 0xEA, 0x01);
209 udelay(200);
210 zl10353_single_write(fe, 0xEA, 0x00);
211
212 zl10353_single_write(fe, AGC_TARGET, 0x28);
213
214 if (op->transmission_mode != TRANSMISSION_MODE_AUTO)
215 acq_ctl |= (1 << 0);
216 if (op->guard_interval != GUARD_INTERVAL_AUTO)
217 acq_ctl |= (1 << 1);
218 zl10353_single_write(fe, ACQ_CTL, acq_ctl);
219
220 switch (op->bandwidth) {
221 case BANDWIDTH_6_MHZ:
222 /* These are extrapolated from the 7 and 8MHz values */
223 zl10353_single_write(fe, MCLK_RATIO, 0x97);
224 zl10353_single_write(fe, 0x64, 0x34);
225 zl10353_single_write(fe, 0xcc, 0xdd);
226 break;
227 case BANDWIDTH_7_MHZ:
228 zl10353_single_write(fe, MCLK_RATIO, 0x86);
229 zl10353_single_write(fe, 0x64, 0x35);
230 zl10353_single_write(fe, 0xcc, 0x73);
231 break;
232 case BANDWIDTH_8_MHZ:
233 default:
234 zl10353_single_write(fe, MCLK_RATIO, 0x75);
235 zl10353_single_write(fe, 0x64, 0x36);
236 zl10353_single_write(fe, 0xcc, 0x73);
237 }
238
239 zl10353_calc_nominal_rate(fe, op->bandwidth, &nominal_rate);
240 zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate));
241 zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate));
242 state->bandwidth = op->bandwidth;
243
244 zl10353_calc_input_freq(fe, &input_freq);
245 zl10353_single_write(fe, INPUT_FREQ_1, msb(input_freq));
246 zl10353_single_write(fe, INPUT_FREQ_0, lsb(input_freq));
247
248 /* Hint at TPS settings */
249 switch (op->code_rate_HP) {
250 case FEC_2_3:
251 tps |= (1 << 7);
252 break;
253 case FEC_3_4:
254 tps |= (2 << 7);
255 break;
256 case FEC_5_6:
257 tps |= (3 << 7);
258 break;
259 case FEC_7_8:
260 tps |= (4 << 7);
261 break;
262 case FEC_1_2:
263 case FEC_AUTO:
264 break;
265 default:
266 return -EINVAL;
267 }
268
269 switch (op->code_rate_LP) {
270 case FEC_2_3:
271 tps |= (1 << 4);
272 break;
273 case FEC_3_4:
274 tps |= (2 << 4);
275 break;
276 case FEC_5_6:
277 tps |= (3 << 4);
278 break;
279 case FEC_7_8:
280 tps |= (4 << 4);
281 break;
282 case FEC_1_2:
283 case FEC_AUTO:
284 break;
285 case FEC_NONE:
286 if (op->hierarchy_information == HIERARCHY_AUTO ||
287 op->hierarchy_information == HIERARCHY_NONE)
288 break;
289 default:
290 return -EINVAL;
291 }
292
293 switch (op->constellation) {
294 case QPSK:
295 break;
296 case QAM_AUTO:
297 case QAM_16:
298 tps |= (1 << 13);
299 break;
300 case QAM_64:
301 tps |= (2 << 13);
302 break;
303 default:
304 return -EINVAL;
305 }
306
307 switch (op->transmission_mode) {
308 case TRANSMISSION_MODE_2K:
309 case TRANSMISSION_MODE_AUTO:
310 break;
311 case TRANSMISSION_MODE_8K:
312 tps |= (1 << 0);
313 break;
314 default:
315 return -EINVAL;
316 }
317
318 switch (op->guard_interval) {
319 case GUARD_INTERVAL_1_32:
320 case GUARD_INTERVAL_AUTO:
321 break;
322 case GUARD_INTERVAL_1_16:
323 tps |= (1 << 2);
324 break;
325 case GUARD_INTERVAL_1_8:
326 tps |= (2 << 2);
327 break;
328 case GUARD_INTERVAL_1_4:
329 tps |= (3 << 2);
330 break;
331 default:
332 return -EINVAL;
333 }
334
335 switch (op->hierarchy_information) {
336 case HIERARCHY_AUTO:
337 case HIERARCHY_NONE:
338 break;
339 case HIERARCHY_1:
340 tps |= (1 << 10);
341 break;
342 case HIERARCHY_2:
343 tps |= (2 << 10);
344 break;
345 case HIERARCHY_4:
346 tps |= (3 << 10);
347 break;
348 default:
349 return -EINVAL;
350 }
351
352 zl10353_single_write(fe, TPS_GIVEN_1, msb(tps));
353 zl10353_single_write(fe, TPS_GIVEN_0, lsb(tps));
354
355 if (fe->ops.i2c_gate_ctrl)
356 fe->ops.i2c_gate_ctrl(fe, 0);
357
358 /*
359 * If there is no tuner attached to the secondary I2C bus, we call
360 * set_params to program a potential tuner attached somewhere else.
361 * Otherwise, we update the PLL registers via calc_regs.
362 */
363 if (state->config.no_tuner) {
364 if (fe->ops.tuner_ops.set_params) {
365 fe->ops.tuner_ops.set_params(fe, param);
366 if (fe->ops.i2c_gate_ctrl)
367 fe->ops.i2c_gate_ctrl(fe, 0);
368 }
369 } else if (fe->ops.tuner_ops.calc_regs) {
370 fe->ops.tuner_ops.calc_regs(fe, param, pllbuf + 1, 5);
371 pllbuf[1] <<= 1;
372 zl10353_write(fe, pllbuf, sizeof(pllbuf));
373 }
374
375 zl10353_single_write(fe, 0x5F, 0x13);
376
377 /* If no attached tuner or invalid PLL registers, just start the FSM. */
378 if (state->config.no_tuner || fe->ops.tuner_ops.calc_regs == NULL)
379 zl10353_single_write(fe, FSM_GO, 0x01);
380 else
381 zl10353_single_write(fe, TUNER_GO, 0x01);
382
383 return 0;
384 }
385
386 static int zl10353_get_parameters(struct dvb_frontend *fe,
387 struct dvb_frontend_parameters *param)
388 {
389 struct zl10353_state *state = fe->demodulator_priv;
390 struct dvb_ofdm_parameters *op = &param->u.ofdm;
391 int s6, s9;
392 u16 tps;
393 static const u8 tps_fec_to_api[8] = {
394 FEC_1_2,
395 FEC_2_3,
396 FEC_3_4,
397 FEC_5_6,
398 FEC_7_8,
399 FEC_AUTO,
400 FEC_AUTO,
401 FEC_AUTO
402 };
403
404 s6 = zl10353_read_register(state, STATUS_6);
405 s9 = zl10353_read_register(state, STATUS_9);
406 if (s6 < 0 || s9 < 0)
407 return -EREMOTEIO;
408 if ((s6 & (1 << 5)) == 0 || (s9 & (1 << 4)) == 0)
409 return -EINVAL; /* no FE or TPS lock */
410
411 tps = zl10353_read_register(state, TPS_RECEIVED_1) << 8 |
412 zl10353_read_register(state, TPS_RECEIVED_0);
413
414 op->code_rate_HP = tps_fec_to_api[(tps >> 7) & 7];
415 op->code_rate_LP = tps_fec_to_api[(tps >> 4) & 7];
416
417 switch ((tps >> 13) & 3) {
418 case 0:
419 op->constellation = QPSK;
420 break;
421 case 1:
422 op->constellation = QAM_16;
423 break;
424 case 2:
425 op->constellation = QAM_64;
426 break;
427 default:
428 op->constellation = QAM_AUTO;
429 break;
430 }
431
432 op->transmission_mode = (tps & 0x01) ? TRANSMISSION_MODE_8K :
433 TRANSMISSION_MODE_2K;
434
435 switch ((tps >> 2) & 3) {
436 case 0:
437 op->guard_interval = GUARD_INTERVAL_1_32;
438 break;
439 case 1:
440 op->guard_interval = GUARD_INTERVAL_1_16;
441 break;
442 case 2:
443 op->guard_interval = GUARD_INTERVAL_1_8;
444 break;
445 case 3:
446 op->guard_interval = GUARD_INTERVAL_1_4;
447 break;
448 default:
449 op->guard_interval = GUARD_INTERVAL_AUTO;
450 break;
451 }
452
453 switch ((tps >> 10) & 7) {
454 case 0:
455 op->hierarchy_information = HIERARCHY_NONE;
456 break;
457 case 1:
458 op->hierarchy_information = HIERARCHY_1;
459 break;
460 case 2:
461 op->hierarchy_information = HIERARCHY_2;
462 break;
463 case 3:
464 op->hierarchy_information = HIERARCHY_4;
465 break;
466 default:
467 op->hierarchy_information = HIERARCHY_AUTO;
468 break;
469 }
470
471 param->frequency = state->frequency;
472 op->bandwidth = state->bandwidth;
473 param->inversion = INVERSION_AUTO;
474
475 return 0;
476 }
477
478 static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status)
479 {
480 struct zl10353_state *state = fe->demodulator_priv;
481 int s6, s7, s8;
482
483 if ((s6 = zl10353_read_register(state, STATUS_6)) < 0)
484 return -EREMOTEIO;
485 if ((s7 = zl10353_read_register(state, STATUS_7)) < 0)
486 return -EREMOTEIO;
487 if ((s8 = zl10353_read_register(state, STATUS_8)) < 0)
488 return -EREMOTEIO;
489
490 *status = 0;
491 if (s6 & (1 << 2))
492 *status |= FE_HAS_CARRIER;
493 if (s6 & (1 << 1))
494 *status |= FE_HAS_VITERBI;
495 if (s6 & (1 << 5))
496 *status |= FE_HAS_LOCK;
497 if (s7 & (1 << 4))
498 *status |= FE_HAS_SYNC;
499 if (s8 & (1 << 6))
500 *status |= FE_HAS_SIGNAL;
501
502 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
503 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
504 *status &= ~FE_HAS_LOCK;
505
506 return 0;
507 }
508
509 static int zl10353_read_ber(struct dvb_frontend *fe, u32 *ber)
510 {
511 struct zl10353_state *state = fe->demodulator_priv;
512
513 *ber = zl10353_read_register(state, RS_ERR_CNT_2) << 16 |
514 zl10353_read_register(state, RS_ERR_CNT_1) << 8 |
515 zl10353_read_register(state, RS_ERR_CNT_0);
516
517 return 0;
518 }
519
520 static int zl10353_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
521 {
522 struct zl10353_state *state = fe->demodulator_priv;
523
524 u16 signal = zl10353_read_register(state, AGC_GAIN_1) << 10 |
525 zl10353_read_register(state, AGC_GAIN_0) << 2 | 3;
526
527 *strength = ~signal;
528
529 return 0;
530 }
531
532 static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr)
533 {
534 struct zl10353_state *state = fe->demodulator_priv;
535 u8 _snr;
536
537 if (debug_regs)
538 zl10353_dump_regs(fe);
539
540 _snr = zl10353_read_register(state, SNR);
541 *snr = (_snr << 8) | _snr;
542
543 return 0;
544 }
545
546 static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
547 {
548 struct zl10353_state *state = fe->demodulator_priv;
549 u32 ubl = 0;
550
551 ubl = zl10353_read_register(state, RS_UBC_1) << 8 |
552 zl10353_read_register(state, RS_UBC_0);
553
554 state->ucblocks += ubl;
555 *ucblocks = state->ucblocks;
556
557 return 0;
558 }
559
560 static int zl10353_get_tune_settings(struct dvb_frontend *fe,
561 struct dvb_frontend_tune_settings
562 *fe_tune_settings)
563 {
564 fe_tune_settings->min_delay_ms = 1000;
565 fe_tune_settings->step_size = 0;
566 fe_tune_settings->max_drift = 0;
567
568 return 0;
569 }
570
571 static int zl10353_init(struct dvb_frontend *fe)
572 {
573 struct zl10353_state *state = fe->demodulator_priv;
574 u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F };
575 int rc = 0;
576
577 if (debug_regs)
578 zl10353_dump_regs(fe);
579 if (state->config.parallel_ts)
580 zl10353_reset_attach[2] &= ~0x20;
581 if (state->config.clock_ctl_1)
582 zl10353_reset_attach[3] = state->config.clock_ctl_1;
583 if (state->config.pll_0)
584 zl10353_reset_attach[4] = state->config.pll_0;
585
586 /* Do a "hard" reset if not already done */
587 if (zl10353_read_register(state, 0x50) != zl10353_reset_attach[1] ||
588 zl10353_read_register(state, 0x51) != zl10353_reset_attach[2]) {
589 rc = zl10353_write(fe, zl10353_reset_attach,
590 sizeof(zl10353_reset_attach));
591 if (debug_regs)
592 zl10353_dump_regs(fe);
593 }
594
595 return 0;
596 }
597
598 static int zl10353_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
599 {
600 struct zl10353_state *state = fe->demodulator_priv;
601 u8 val = 0x0a;
602
603 if (state->config.disable_i2c_gate_ctrl) {
604 /* No tuner attached to the internal I2C bus */
605 /* If set enable I2C bridge, the main I2C bus stopped hardly */
606 return 0;
607 }
608
609 if (enable)
610 val |= 0x10;
611
612 return zl10353_single_write(fe, 0x62, val);
613 }
614
615 static void zl10353_release(struct dvb_frontend *fe)
616 {
617 struct zl10353_state *state = fe->demodulator_priv;
618 kfree(state);
619 }
620
621 static struct dvb_frontend_ops zl10353_ops;
622
623 struct dvb_frontend *zl10353_attach(const struct zl10353_config *config,
624 struct i2c_adapter *i2c)
625 {
626 struct zl10353_state *state = NULL;
627 int id;
628
629 /* allocate memory for the internal state */
630 state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL);
631 if (state == NULL)
632 goto error;
633
634 /* setup the state */
635 state->i2c = i2c;
636 memcpy(&state->config, config, sizeof(struct zl10353_config));
637
638 /* check if the demod is there */
639 id = zl10353_read_register(state, CHIP_ID);
640 if ((id != ID_ZL10353) && (id != ID_CE6230) && (id != ID_CE6231))
641 goto error;
642
643 /* create dvb_frontend */
644 memcpy(&state->frontend.ops, &zl10353_ops, sizeof(struct dvb_frontend_ops));
645 state->frontend.demodulator_priv = state;
646
647 return &state->frontend;
648 error:
649 kfree(state);
650 return NULL;
651 }
652
653 static struct dvb_frontend_ops zl10353_ops = {
654
655 .info = {
656 .name = "Zarlink ZL10353 DVB-T",
657 .type = FE_OFDM,
658 .frequency_min = 174000000,
659 .frequency_max = 862000000,
660 .frequency_stepsize = 166667,
661 .frequency_tolerance = 0,
662 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 |
663 FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
664 FE_CAN_FEC_AUTO |
665 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
666 FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
667 FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER |
668 FE_CAN_MUTE_TS
669 },
670
671 .release = zl10353_release,
672
673 .init = zl10353_init,
674 .sleep = zl10353_sleep,
675 .i2c_gate_ctrl = zl10353_i2c_gate_ctrl,
676 .write = zl10353_write,
677
678 .set_frontend = zl10353_set_parameters,
679 .get_frontend = zl10353_get_parameters,
680 .get_tune_settings = zl10353_get_tune_settings,
681
682 .read_status = zl10353_read_status,
683 .read_ber = zl10353_read_ber,
684 .read_signal_strength = zl10353_read_signal_strength,
685 .read_snr = zl10353_read_snr,
686 .read_ucblocks = zl10353_read_ucblocks,
687 };
688
689 module_param(debug, int, 0644);
690 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
691
692 module_param(debug_regs, int, 0644);
693 MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
694
695 MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver");
696 MODULE_AUTHOR("Chris Pascoe");
697 MODULE_LICENSE("GPL");
698
699 EXPORT_SYMBOL(zl10353_attach);
Linux for Ginger Game Console