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VFS: fix unused variable warning
[linux/fpc-iii.git] / drivers / media / dvb / frontends / s5h1420.c
blob720ed9ff7c5fda6a43b0b5074e16ee28c487eaf0
1 /*
2 * Driver for
3 * Samsung S5H1420 and
4 * PnpNetwork PN1010 QPSK Demodulator
5 *
6 * Copyright (C) 2005 Andrew de Quincey <adq_dvb@lidskialf.net>
7 * Copyright (C) 2005-8 Patrick Boettcher <pb@linuxtv.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 *
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/string.h>
29 #include <linux/slab.h>
30 #include <linux/delay.h>
31 #include <linux/jiffies.h>
32 #include <asm/div64.h>
33
34 #include <linux/i2c.h>
35
36
37 #include "dvb_frontend.h"
38 #include "s5h1420.h"
39 #include "s5h1420_priv.h"
40
41 #define TONE_FREQ 22000
42
43 struct s5h1420_state {
44 struct i2c_adapter* i2c;
45 const struct s5h1420_config* config;
46
47 struct dvb_frontend frontend;
48 struct i2c_adapter tuner_i2c_adapter;
49
50 u8 CON_1_val;
51
52 u8 postlocked:1;
53 u32 fclk;
54 u32 tunedfreq;
55 fe_code_rate_t fec_inner;
56 u32 symbol_rate;
57
58 /* FIXME: ugly workaround for flexcop's incapable i2c-controller
59 * it does not support repeated-start, workaround: write addr-1
60 * and then read
61 */
62 u8 shadow[255];
63 };
64
65 static u32 s5h1420_getsymbolrate(struct s5h1420_state* state);
66 static int s5h1420_get_tune_settings(struct dvb_frontend* fe,
67 struct dvb_frontend_tune_settings* fesettings);
68
69
70 static int debug;
71 module_param(debug, int, 0644);
72 MODULE_PARM_DESC(debug, "enable debugging");
73
74 #define dprintk(x...) do { \
75 if (debug) \
76 printk(KERN_DEBUG "S5H1420: " x); \
77 } while (0)
78
79 static u8 s5h1420_readreg(struct s5h1420_state *state, u8 reg)
80 {
81 int ret;
82 u8 b[2];
83 struct i2c_msg msg[] = {
84 { .addr = state->config->demod_address, .flags = 0, .buf = b, .len = 2 },
85 { .addr = state->config->demod_address, .flags = 0, .buf = &reg, .len = 1 },
86 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = 1 },
87 };
88
89 b[0] = (reg - 1) & 0xff;
90 b[1] = state->shadow[(reg - 1) & 0xff];
91
92 if (state->config->repeated_start_workaround) {
93 ret = i2c_transfer(state->i2c, msg, 3);
94 if (ret != 3)
95 return ret;
96 } else {
97 ret = i2c_transfer(state->i2c, &msg[1], 2);
98 if (ret != 2)
99 return ret;
100 }
101
102 /* dprintk("rd(%02x): %02x %02x\n", state->config->demod_address, reg, b[0]); */
103
104 return b[0];
105 }
106
107 static int s5h1420_writereg (struct s5h1420_state* state, u8 reg, u8 data)
108 {
109 u8 buf[] = { reg, data };
110 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
111 int err;
112
113 /* dprintk("wr(%02x): %02x %02x\n", state->config->demod_address, reg, data); */
114 err = i2c_transfer(state->i2c, &msg, 1);
115 if (err != 1) {
116 dprintk("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data);
117 return -EREMOTEIO;
118 }
119 state->shadow[reg] = data;
120
121 return 0;
122 }
123
124 static int s5h1420_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
125 {
126 struct s5h1420_state* state = fe->demodulator_priv;
127
128 dprintk("enter %s\n", __func__);
129
130 switch(voltage) {
131 case SEC_VOLTAGE_13:
132 s5h1420_writereg(state, 0x3c,
133 (s5h1420_readreg(state, 0x3c) & 0xfe) | 0x02);
134 break;
135
136 case SEC_VOLTAGE_18:
137 s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) | 0x03);
138 break;
139
140 case SEC_VOLTAGE_OFF:
141 s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) & 0xfd);
142 break;
143 }
144
145 dprintk("leave %s\n", __func__);
146 return 0;
147 }
148
149 static int s5h1420_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
150 {
151 struct s5h1420_state* state = fe->demodulator_priv;
152
153 dprintk("enter %s\n", __func__);
154 switch(tone) {
155 case SEC_TONE_ON:
156 s5h1420_writereg(state, 0x3b,
157 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x08);
158 break;
159
160 case SEC_TONE_OFF:
161 s5h1420_writereg(state, 0x3b,
162 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x01);
163 break;
164 }
165 dprintk("leave %s\n", __func__);
166
167 return 0;
168 }
169
170 static int s5h1420_send_master_cmd (struct dvb_frontend* fe,
171 struct dvb_diseqc_master_cmd* cmd)
172 {
173 struct s5h1420_state* state = fe->demodulator_priv;
174 u8 val;
175 int i;
176 unsigned long timeout;
177 int result = 0;
178
179 dprintk("enter %s\n", __func__);
180 if (cmd->msg_len > 8)
181 return -EINVAL;
182
183 /* setup for DISEQC */
184 val = s5h1420_readreg(state, 0x3b);
185 s5h1420_writereg(state, 0x3b, 0x02);
186 msleep(15);
187
188 /* write the DISEQC command bytes */
189 for(i=0; i< cmd->msg_len; i++) {
190 s5h1420_writereg(state, 0x3d + i, cmd->msg[i]);
191 }
192
193 /* kick off transmission */
194 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) |
195 ((cmd->msg_len-1) << 4) | 0x08);
196
197 /* wait for transmission to complete */
198 timeout = jiffies + ((100*HZ) / 1000);
199 while(time_before(jiffies, timeout)) {
200 if (!(s5h1420_readreg(state, 0x3b) & 0x08))
201 break;
202
203 msleep(5);
204 }
205 if (time_after(jiffies, timeout))
206 result = -ETIMEDOUT;
207
208 /* restore original settings */
209 s5h1420_writereg(state, 0x3b, val);
210 msleep(15);
211 dprintk("leave %s\n", __func__);
212 return result;
213 }
214
215 static int s5h1420_recv_slave_reply (struct dvb_frontend* fe,
216 struct dvb_diseqc_slave_reply* reply)
217 {
218 struct s5h1420_state* state = fe->demodulator_priv;
219 u8 val;
220 int i;
221 int length;
222 unsigned long timeout;
223 int result = 0;
224
225 /* setup for DISEQC recieve */
226 val = s5h1420_readreg(state, 0x3b);
227 s5h1420_writereg(state, 0x3b, 0x82); /* FIXME: guess - do we need to set DIS_RDY(0x08) in receive mode? */
228 msleep(15);
229
230 /* wait for reception to complete */
231 timeout = jiffies + ((reply->timeout*HZ) / 1000);
232 while(time_before(jiffies, timeout)) {
233 if (!(s5h1420_readreg(state, 0x3b) & 0x80)) /* FIXME: do we test DIS_RDY(0x08) or RCV_EN(0x80)? */
234 break;
235
236 msleep(5);
237 }
238 if (time_after(jiffies, timeout)) {
239 result = -ETIMEDOUT;
240 goto exit;
241 }
242
243 /* check error flag - FIXME: not sure what this does - docs do not describe
244 * beyond "error flag for diseqc receive data :( */
245 if (s5h1420_readreg(state, 0x49)) {
246 result = -EIO;
247 goto exit;
248 }
249
250 /* check length */
251 length = (s5h1420_readreg(state, 0x3b) & 0x70) >> 4;
252 if (length > sizeof(reply->msg)) {
253 result = -EOVERFLOW;
254 goto exit;
255 }
256 reply->msg_len = length;
257
258 /* extract data */
259 for(i=0; i< length; i++) {
260 reply->msg[i] = s5h1420_readreg(state, 0x3d + i);
261 }
262
263 exit:
264 /* restore original settings */
265 s5h1420_writereg(state, 0x3b, val);
266 msleep(15);
267 return result;
268 }
269
270 static int s5h1420_send_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd)
271 {
272 struct s5h1420_state* state = fe->demodulator_priv;
273 u8 val;
274 int result = 0;
275 unsigned long timeout;
276
277 /* setup for tone burst */
278 val = s5h1420_readreg(state, 0x3b);
279 s5h1420_writereg(state, 0x3b, (s5h1420_readreg(state, 0x3b) & 0x70) | 0x01);
280
281 /* set value for B position if requested */
282 if (minicmd == SEC_MINI_B) {
283 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x04);
284 }
285 msleep(15);
286
287 /* start transmission */
288 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x08);
289
290 /* wait for transmission to complete */
291 timeout = jiffies + ((100*HZ) / 1000);
292 while(time_before(jiffies, timeout)) {
293 if (!(s5h1420_readreg(state, 0x3b) & 0x08))
294 break;
295
296 msleep(5);
297 }
298 if (time_after(jiffies, timeout))
299 result = -ETIMEDOUT;
300
301 /* restore original settings */
302 s5h1420_writereg(state, 0x3b, val);
303 msleep(15);
304 return result;
305 }
306
307 static fe_status_t s5h1420_get_status_bits(struct s5h1420_state* state)
308 {
309 u8 val;
310 fe_status_t status = 0;
311
312 val = s5h1420_readreg(state, 0x14);
313 if (val & 0x02)
314 status |= FE_HAS_SIGNAL;
315 if (val & 0x01)
316 status |= FE_HAS_CARRIER;
317 val = s5h1420_readreg(state, 0x36);
318 if (val & 0x01)
319 status |= FE_HAS_VITERBI;
320 if (val & 0x20)
321 status |= FE_HAS_SYNC;
322 if (status == (FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|FE_HAS_SYNC))
323 status |= FE_HAS_LOCK;
324
325 return status;
326 }
327
328 static int s5h1420_read_status(struct dvb_frontend* fe, fe_status_t* status)
329 {
330 struct s5h1420_state* state = fe->demodulator_priv;
331 u8 val;
332
333 dprintk("enter %s\n", __func__);
334
335 if (status == NULL)
336 return -EINVAL;
337
338 /* determine lock state */
339 *status = s5h1420_get_status_bits(state);
340
341 /* fix for FEC 5/6 inversion issue - if it doesn't quite lock, invert
342 the inversion, wait a bit and check again */
343 if (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI)) {
344 val = s5h1420_readreg(state, Vit10);
345 if ((val & 0x07) == 0x03) {
346 if (val & 0x08)
347 s5h1420_writereg(state, Vit09, 0x13);
348 else
349 s5h1420_writereg(state, Vit09, 0x1b);
350
351 /* wait a bit then update lock status */
352 mdelay(200);
353 *status = s5h1420_get_status_bits(state);
354 }
355 }
356
357 /* perform post lock setup */
358 if ((*status & FE_HAS_LOCK) && !state->postlocked) {
359
360 /* calculate the data rate */
361 u32 tmp = s5h1420_getsymbolrate(state);
362 switch (s5h1420_readreg(state, Vit10) & 0x07) {
363 case 0: tmp = (tmp * 2 * 1) / 2; break;
364 case 1: tmp = (tmp * 2 * 2) / 3; break;
365 case 2: tmp = (tmp * 2 * 3) / 4; break;
366 case 3: tmp = (tmp * 2 * 5) / 6; break;
367 case 4: tmp = (tmp * 2 * 6) / 7; break;
368 case 5: tmp = (tmp * 2 * 7) / 8; break;
369 }
370
371 if (tmp == 0) {
372 printk(KERN_ERR "s5h1420: avoided division by 0\n");
373 tmp = 1;
374 }
375 tmp = state->fclk / tmp;
376
377
378 /* set the MPEG_CLK_INTL for the calculated data rate */
379 if (tmp < 2)
380 val = 0x00;
381 else if (tmp < 5)
382 val = 0x01;
383 else if (tmp < 9)
384 val = 0x02;
385 else if (tmp < 13)
386 val = 0x03;
387 else if (tmp < 17)
388 val = 0x04;
389 else if (tmp < 25)
390 val = 0x05;
391 else if (tmp < 33)
392 val = 0x06;
393 else
394 val = 0x07;
395 dprintk("for MPEG_CLK_INTL %d %x\n", tmp, val);
396
397 s5h1420_writereg(state, FEC01, 0x18);
398 s5h1420_writereg(state, FEC01, 0x10);
399 s5h1420_writereg(state, FEC01, val);
400
401 /* Enable "MPEG_Out" */
402 val = s5h1420_readreg(state, Mpeg02);
403 s5h1420_writereg(state, Mpeg02, val | (1 << 6));
404
405 /* kicker disable */
406 val = s5h1420_readreg(state, QPSK01) & 0x7f;
407 s5h1420_writereg(state, QPSK01, val);
408
409 /* DC freeze TODO it was never activated by default or it can stay activated */
410
411 if (s5h1420_getsymbolrate(state) >= 20000000) {
412 s5h1420_writereg(state, Loop04, 0x8a);
413 s5h1420_writereg(state, Loop05, 0x6a);
414 } else {
415 s5h1420_writereg(state, Loop04, 0x58);
416 s5h1420_writereg(state, Loop05, 0x27);
417 }
418
419 /* post-lock processing has been done! */
420 state->postlocked = 1;
421 }
422
423 dprintk("leave %s\n", __func__);
424
425 return 0;
426 }
427
428 static int s5h1420_read_ber(struct dvb_frontend* fe, u32* ber)
429 {
430 struct s5h1420_state* state = fe->demodulator_priv;
431
432 s5h1420_writereg(state, 0x46, 0x1d);
433 mdelay(25);
434
435 *ber = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47);
436
437 return 0;
438 }
439
440 static int s5h1420_read_signal_strength(struct dvb_frontend* fe, u16* strength)
441 {
442 struct s5h1420_state* state = fe->demodulator_priv;
443
444 u8 val = s5h1420_readreg(state, 0x15);
445
446 *strength = (u16) ((val << 8) | val);
447
448 return 0;
449 }
450
451 static int s5h1420_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
452 {
453 struct s5h1420_state* state = fe->demodulator_priv;
454
455 s5h1420_writereg(state, 0x46, 0x1f);
456 mdelay(25);
457
458 *ucblocks = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47);
459
460 return 0;
461 }
462
463 static void s5h1420_reset(struct s5h1420_state* state)
464 {
465 dprintk("%s\n", __func__);
466 s5h1420_writereg (state, 0x01, 0x08);
467 s5h1420_writereg (state, 0x01, 0x00);
468 udelay(10);
469 }
470
471 static void s5h1420_setsymbolrate(struct s5h1420_state* state,
472 struct dvb_frontend_parameters *p)
473 {
474 u8 v;
475 u64 val;
476
477 dprintk("enter %s\n", __func__);
478
479 val = ((u64) p->u.qpsk.symbol_rate / 1000ULL) * (1ULL<<24);
480 if (p->u.qpsk.symbol_rate < 29000000)
481 val *= 2;
482 do_div(val, (state->fclk / 1000));
483
484 dprintk("symbol rate register: %06llx\n", (unsigned long long)val);
485
486 v = s5h1420_readreg(state, Loop01);
487 s5h1420_writereg(state, Loop01, v & 0x7f);
488 s5h1420_writereg(state, Tnco01, val >> 16);
489 s5h1420_writereg(state, Tnco02, val >> 8);
490 s5h1420_writereg(state, Tnco03, val & 0xff);
491 s5h1420_writereg(state, Loop01, v | 0x80);
492 dprintk("leave %s\n", __func__);
493 }
494
495 static u32 s5h1420_getsymbolrate(struct s5h1420_state* state)
496 {
497 return state->symbol_rate;
498 }
499
500 static void s5h1420_setfreqoffset(struct s5h1420_state* state, int freqoffset)
501 {
502 int val;
503 u8 v;
504
505 dprintk("enter %s\n", __func__);
506
507 /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so
508 * divide fclk by 1000000 to get the correct value. */
509 val = -(int) ((freqoffset * (1<<24)) / (state->fclk / 1000000));
510
511 dprintk("phase rotator/freqoffset: %d %06x\n", freqoffset, val);
512
513 v = s5h1420_readreg(state, Loop01);
514 s5h1420_writereg(state, Loop01, v & 0xbf);
515 s5h1420_writereg(state, Pnco01, val >> 16);
516 s5h1420_writereg(state, Pnco02, val >> 8);
517 s5h1420_writereg(state, Pnco03, val & 0xff);
518 s5h1420_writereg(state, Loop01, v | 0x40);
519 dprintk("leave %s\n", __func__);
520 }
521
522 static int s5h1420_getfreqoffset(struct s5h1420_state* state)
523 {
524 int val;
525
526 s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) | 0x08);
527 val = s5h1420_readreg(state, 0x0e) << 16;
528 val |= s5h1420_readreg(state, 0x0f) << 8;
529 val |= s5h1420_readreg(state, 0x10);
530 s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) & 0xf7);
531
532 if (val & 0x800000)
533 val |= 0xff000000;
534
535 /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so
536 * divide fclk by 1000000 to get the correct value. */
537 val = (((-val) * (state->fclk/1000000)) / (1<<24));
538
539 return val;
540 }
541
542 static void s5h1420_setfec_inversion(struct s5h1420_state* state,
543 struct dvb_frontend_parameters *p)
544 {
545 u8 inversion = 0;
546 u8 vit08, vit09;
547
548 dprintk("enter %s\n", __func__);
549
550 if (p->inversion == INVERSION_OFF)
551 inversion = state->config->invert ? 0x08 : 0;
552 else if (p->inversion == INVERSION_ON)
553 inversion = state->config->invert ? 0 : 0x08;
554
555 if ((p->u.qpsk.fec_inner == FEC_AUTO) || (p->inversion == INVERSION_AUTO)) {
556 vit08 = 0x3f;
557 vit09 = 0;
558 } else {
559 switch(p->u.qpsk.fec_inner) {
560 case FEC_1_2:
561 vit08 = 0x01; vit09 = 0x10;
562 break;
563
564 case FEC_2_3:
565 vit08 = 0x02; vit09 = 0x11;
566 break;
567
568 case FEC_3_4:
569 vit08 = 0x04; vit09 = 0x12;
570 break;
571
572 case FEC_5_6:
573 vit08 = 0x08; vit09 = 0x13;
574 break;
575
576 case FEC_6_7:
577 vit08 = 0x10; vit09 = 0x14;
578 break;
579
580 case FEC_7_8:
581 vit08 = 0x20; vit09 = 0x15;
582 break;
583
584 default:
585 return;
586 }
587 }
588 vit09 |= inversion;
589 dprintk("fec: %02x %02x\n", vit08, vit09);
590 s5h1420_writereg(state, Vit08, vit08);
591 s5h1420_writereg(state, Vit09, vit09);
592 dprintk("leave %s\n", __func__);
593 }
594
595 static fe_code_rate_t s5h1420_getfec(struct s5h1420_state* state)
596 {
597 switch(s5h1420_readreg(state, 0x32) & 0x07) {
598 case 0:
599 return FEC_1_2;
600
601 case 1:
602 return FEC_2_3;
603
604 case 2:
605 return FEC_3_4;
606
607 case 3:
608 return FEC_5_6;
609
610 case 4:
611 return FEC_6_7;
612
613 case 5:
614 return FEC_7_8;
615 }
616
617 return FEC_NONE;
618 }
619
620 static fe_spectral_inversion_t s5h1420_getinversion(struct s5h1420_state* state)
621 {
622 if (s5h1420_readreg(state, 0x32) & 0x08)
623 return INVERSION_ON;
624
625 return INVERSION_OFF;
626 }
627
628 static int s5h1420_set_frontend(struct dvb_frontend* fe,
629 struct dvb_frontend_parameters *p)
630 {
631 struct s5h1420_state* state = fe->demodulator_priv;
632 int frequency_delta;
633 struct dvb_frontend_tune_settings fesettings;
634 uint8_t clock_settting;
635
636 dprintk("enter %s\n", __func__);
637
638 /* check if we should do a fast-tune */
639 memcpy(&fesettings.parameters, p, sizeof(struct dvb_frontend_parameters));
640 s5h1420_get_tune_settings(fe, &fesettings);
641 frequency_delta = p->frequency - state->tunedfreq;
642 if ((frequency_delta > -fesettings.max_drift) &&
643 (frequency_delta < fesettings.max_drift) &&
644 (frequency_delta != 0) &&
645 (state->fec_inner == p->u.qpsk.fec_inner) &&
646 (state->symbol_rate == p->u.qpsk.symbol_rate)) {
647
648 if (fe->ops.tuner_ops.set_params) {
649 fe->ops.tuner_ops.set_params(fe, p);
650 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
651 }
652 if (fe->ops.tuner_ops.get_frequency) {
653 u32 tmp;
654 fe->ops.tuner_ops.get_frequency(fe, &tmp);
655 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
656 s5h1420_setfreqoffset(state, p->frequency - tmp);
657 } else {
658 s5h1420_setfreqoffset(state, 0);
659 }
660 dprintk("simple tune\n");
661 return 0;
662 }
663 dprintk("tuning demod\n");
664
665 /* first of all, software reset */
666 s5h1420_reset(state);
667
668 /* set s5h1420 fclk PLL according to desired symbol rate */
669 if (p->u.qpsk.symbol_rate > 33000000)
670 state->fclk = 80000000;
671 else if (p->u.qpsk.symbol_rate > 28500000)
672 state->fclk = 59000000;
673 else if (p->u.qpsk.symbol_rate > 25000000)
674 state->fclk = 86000000;
675 else if (p->u.qpsk.symbol_rate > 1900000)
676 state->fclk = 88000000;
677 else
678 state->fclk = 44000000;
679
680 /* Clock */
681 switch (state->fclk) {
682 default:
683 case 88000000:
684 clock_settting = 80;
685 break;
686 case 86000000:
687 clock_settting = 78;
688 break;
689 case 80000000:
690 clock_settting = 72;
691 break;
692 case 59000000:
693 clock_settting = 51;
694 break;
695 case 44000000:
696 clock_settting = 36;
697 break;
698 }
699 dprintk("pll01: %d, ToneFreq: %d\n", state->fclk/1000000 - 8, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32));
700 s5h1420_writereg(state, PLL01, state->fclk/1000000 - 8);
701 s5h1420_writereg(state, PLL02, 0x40);
702 s5h1420_writereg(state, DiS01, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32));
703
704 /* TODO DC offset removal, config parameter ? */
705 if (p->u.qpsk.symbol_rate > 29000000)
706 s5h1420_writereg(state, QPSK01, 0xae | 0x10);
707 else
708 s5h1420_writereg(state, QPSK01, 0xac | 0x10);
709
710 /* set misc registers */
711 s5h1420_writereg(state, CON_1, 0x00);
712 s5h1420_writereg(state, QPSK02, 0x00);
713 s5h1420_writereg(state, Pre01, 0xb0);
714
715 s5h1420_writereg(state, Loop01, 0xF0);
716 s5h1420_writereg(state, Loop02, 0x2a); /* e7 for s5h1420 */
717 s5h1420_writereg(state, Loop03, 0x79); /* 78 for s5h1420 */
718 if (p->u.qpsk.symbol_rate > 20000000)
719 s5h1420_writereg(state, Loop04, 0x79);
720 else
721 s5h1420_writereg(state, Loop04, 0x58);
722 s5h1420_writereg(state, Loop05, 0x6b);
723
724 if (p->u.qpsk.symbol_rate >= 8000000)
725 s5h1420_writereg(state, Post01, (0 << 6) | 0x10);
726 else if (p->u.qpsk.symbol_rate >= 4000000)
727 s5h1420_writereg(state, Post01, (1 << 6) | 0x10);
728 else
729 s5h1420_writereg(state, Post01, (3 << 6) | 0x10);
730
731 s5h1420_writereg(state, Monitor12, 0x00); /* unfreeze DC compensation */
732
733 s5h1420_writereg(state, Sync01, 0x33);
734 s5h1420_writereg(state, Mpeg01, state->config->cdclk_polarity);
735 s5h1420_writereg(state, Mpeg02, 0x3d); /* Parallel output more, disabled -> enabled later */
736 s5h1420_writereg(state, Err01, 0x03); /* 0x1d for s5h1420 */
737
738 s5h1420_writereg(state, Vit06, 0x6e); /* 0x8e for s5h1420 */
739 s5h1420_writereg(state, DiS03, 0x00);
740 s5h1420_writereg(state, Rf01, 0x61); /* Tuner i2c address - for the gate controller */
741
742 /* set tuner PLL */
743 if (fe->ops.tuner_ops.set_params) {
744 fe->ops.tuner_ops.set_params(fe, p);
745 if (fe->ops.i2c_gate_ctrl)
746 fe->ops.i2c_gate_ctrl(fe, 0);
747 s5h1420_setfreqoffset(state, 0);
748 }
749
750 /* set the reset of the parameters */
751 s5h1420_setsymbolrate(state, p);
752 s5h1420_setfec_inversion(state, p);
753
754 /* start QPSK */
755 s5h1420_writereg(state, QPSK01, s5h1420_readreg(state, QPSK01) | 1);
756
757 state->fec_inner = p->u.qpsk.fec_inner;
758 state->symbol_rate = p->u.qpsk.symbol_rate;
759 state->postlocked = 0;
760 state->tunedfreq = p->frequency;
761
762 dprintk("leave %s\n", __func__);
763 return 0;
764 }
765
766 static int s5h1420_get_frontend(struct dvb_frontend* fe,
767 struct dvb_frontend_parameters *p)
768 {
769 struct s5h1420_state* state = fe->demodulator_priv;
770
771 p->frequency = state->tunedfreq + s5h1420_getfreqoffset(state);
772 p->inversion = s5h1420_getinversion(state);
773 p->u.qpsk.symbol_rate = s5h1420_getsymbolrate(state);
774 p->u.qpsk.fec_inner = s5h1420_getfec(state);
775
776 return 0;
777 }
778
779 static int s5h1420_get_tune_settings(struct dvb_frontend* fe,
780 struct dvb_frontend_tune_settings* fesettings)
781 {
782 if (fesettings->parameters.u.qpsk.symbol_rate > 20000000) {
783 fesettings->min_delay_ms = 50;
784 fesettings->step_size = 2000;
785 fesettings->max_drift = 8000;
786 } else if (fesettings->parameters.u.qpsk.symbol_rate > 12000000) {
787 fesettings->min_delay_ms = 100;
788 fesettings->step_size = 1500;
789 fesettings->max_drift = 9000;
790 } else if (fesettings->parameters.u.qpsk.symbol_rate > 8000000) {
791 fesettings->min_delay_ms = 100;
792 fesettings->step_size = 1000;
793 fesettings->max_drift = 8000;
794 } else if (fesettings->parameters.u.qpsk.symbol_rate > 4000000) {
795 fesettings->min_delay_ms = 100;
796 fesettings->step_size = 500;
797 fesettings->max_drift = 7000;
798 } else if (fesettings->parameters.u.qpsk.symbol_rate > 2000000) {
799 fesettings->min_delay_ms = 200;
800 fesettings->step_size = (fesettings->parameters.u.qpsk.symbol_rate / 8000);
801 fesettings->max_drift = 14 * fesettings->step_size;
802 } else {
803 fesettings->min_delay_ms = 200;
804 fesettings->step_size = (fesettings->parameters.u.qpsk.symbol_rate / 8000);
805 fesettings->max_drift = 18 * fesettings->step_size;
806 }
807
808 return 0;
809 }
810
811 static int s5h1420_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
812 {
813 struct s5h1420_state* state = fe->demodulator_priv;
814
815 if (enable)
816 return s5h1420_writereg(state, 0x02, state->CON_1_val | 1);
817 else
818 return s5h1420_writereg(state, 0x02, state->CON_1_val & 0xfe);
819 }
820
821 static int s5h1420_init (struct dvb_frontend* fe)
822 {
823 struct s5h1420_state* state = fe->demodulator_priv;
824
825 /* disable power down and do reset */
826 state->CON_1_val = 0x10;
827 s5h1420_writereg(state, 0x02, state->CON_1_val);
828 msleep(10);
829 s5h1420_reset(state);
830
831 return 0;
832 }
833
834 static int s5h1420_sleep(struct dvb_frontend* fe)
835 {
836 struct s5h1420_state* state = fe->demodulator_priv;
837 state->CON_1_val = 0x12;
838 return s5h1420_writereg(state, 0x02, state->CON_1_val);
839 }
840
841 static void s5h1420_release(struct dvb_frontend* fe)
842 {
843 struct s5h1420_state* state = fe->demodulator_priv;
844 i2c_del_adapter(&state->tuner_i2c_adapter);
845 kfree(state);
846 }
847
848 static u32 s5h1420_tuner_i2c_func(struct i2c_adapter *adapter)
849 {
850 return I2C_FUNC_I2C;
851 }
852
853 static int s5h1420_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num)
854 {
855 struct s5h1420_state *state = i2c_get_adapdata(i2c_adap);
856 struct i2c_msg m[1 + num];
857 u8 tx_open[2] = { CON_1, state->CON_1_val | 1 }; /* repeater stops once there was a stop condition */
858
859 memset(m, 0, sizeof(struct i2c_msg) * (1 + num));
860
861 m[0].addr = state->config->demod_address;
862 m[0].buf = tx_open;
863 m[0].len = 2;
864
865 memcpy(&m[1], msg, sizeof(struct i2c_msg) * num);
866
867 return i2c_transfer(state->i2c, m, 1+num) == 1 + num ? num : -EIO;
868 }
869
870 static struct i2c_algorithm s5h1420_tuner_i2c_algo = {
871 .master_xfer = s5h1420_tuner_i2c_tuner_xfer,
872 .functionality = s5h1420_tuner_i2c_func,
873 };
874
875 struct i2c_adapter *s5h1420_get_tuner_i2c_adapter(struct dvb_frontend *fe)
876 {
877 struct s5h1420_state *state = fe->demodulator_priv;
878 return &state->tuner_i2c_adapter;
879 }
880 EXPORT_SYMBOL(s5h1420_get_tuner_i2c_adapter);
881
882 static struct dvb_frontend_ops s5h1420_ops;
883
884 struct dvb_frontend *s5h1420_attach(const struct s5h1420_config *config,
885 struct i2c_adapter *i2c)
886 {
887 /* allocate memory for the internal state */
888 struct s5h1420_state *state = kzalloc(sizeof(struct s5h1420_state), GFP_KERNEL);
889 u8 i;
890
891 if (state == NULL)
892 goto error;
893
894 /* setup the state */
895 state->config = config;
896 state->i2c = i2c;
897 state->postlocked = 0;
898 state->fclk = 88000000;
899 state->tunedfreq = 0;
900 state->fec_inner = FEC_NONE;
901 state->symbol_rate = 0;
902
903 /* check if the demod is there + identify it */
904 i = s5h1420_readreg(state, ID01);
905 if (i != 0x03)
906 goto error;
907
908 memset(state->shadow, 0xff, sizeof(state->shadow));
909
910 for (i = 0; i < 0x50; i++)
911 state->shadow[i] = s5h1420_readreg(state, i);
912
913 /* create dvb_frontend */
914 memcpy(&state->frontend.ops, &s5h1420_ops, sizeof(struct dvb_frontend_ops));
915 state->frontend.demodulator_priv = state;
916
917 /* create tuner i2c adapter */
918 strncpy(state->tuner_i2c_adapter.name, "S5H1420-PN1010 tuner I2C bus", I2C_NAME_SIZE);
919 state->tuner_i2c_adapter.class = I2C_CLASS_TV_DIGITAL,
920 state->tuner_i2c_adapter.algo = &s5h1420_tuner_i2c_algo;
921 state->tuner_i2c_adapter.algo_data = NULL;
922 i2c_set_adapdata(&state->tuner_i2c_adapter, state);
923 if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) {
924 printk(KERN_ERR "S5H1420/PN1010: tuner i2c bus could not be initialized\n");
925 goto error;
926 }
927
928 return &state->frontend;
929
930 error:
931 kfree(state);
932 return NULL;
933 }
934 EXPORT_SYMBOL(s5h1420_attach);
935
936 static struct dvb_frontend_ops s5h1420_ops = {
937
938 .info = {
939 .name = "Samsung S5H1420/PnpNetwork PN1010 DVB-S",
940 .type = FE_QPSK,
941 .frequency_min = 950000,
942 .frequency_max = 2150000,
943 .frequency_stepsize = 125, /* kHz for QPSK frontends */
944 .frequency_tolerance = 29500,
945 .symbol_rate_min = 1000000,
946 .symbol_rate_max = 45000000,
947 /* .symbol_rate_tolerance = ???,*/
948 .caps = FE_CAN_INVERSION_AUTO |
949 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
950 FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
951 FE_CAN_QPSK
952 },
953
954 .release = s5h1420_release,
955
956 .init = s5h1420_init,
957 .sleep = s5h1420_sleep,
958 .i2c_gate_ctrl = s5h1420_i2c_gate_ctrl,
959
960 .set_frontend = s5h1420_set_frontend,
961 .get_frontend = s5h1420_get_frontend,
962 .get_tune_settings = s5h1420_get_tune_settings,
963
964 .read_status = s5h1420_read_status,
965 .read_ber = s5h1420_read_ber,
966 .read_signal_strength = s5h1420_read_signal_strength,
967 .read_ucblocks = s5h1420_read_ucblocks,
968
969 .diseqc_send_master_cmd = s5h1420_send_master_cmd,
970 .diseqc_recv_slave_reply = s5h1420_recv_slave_reply,
971 .diseqc_send_burst = s5h1420_send_burst,
972 .set_tone = s5h1420_set_tone,
973 .set_voltage = s5h1420_set_voltage,
974 };
975
976 MODULE_DESCRIPTION("Samsung S5H1420/PnpNetwork PN1010 DVB-S Demodulator driver");
977 MODULE_AUTHOR("Andrew de Quincey, Patrick Boettcher");
978 MODULE_LICENSE("GPL");
Linux with added FPC-III support