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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / dvb-frontends / s5h1420.c
blob6bdec2898bc81f859597cd99025c7845528ce60f
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Driver for
4 * Samsung S5H1420 and
5 * PnpNetwork PN1010 QPSK Demodulator
6 *
7 * Copyright (C) 2005 Andrew de Quincey <adq_dvb@lidskialf.net>
8 * Copyright (C) 2005-8 Patrick Boettcher <pb@linuxtv.org>
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/string.h>
15 #include <linux/slab.h>
16 #include <linux/delay.h>
17 #include <linux/jiffies.h>
18 #include <asm/div64.h>
19
20 #include <linux/i2c.h>
21
22
23 #include <media/dvb_frontend.h>
24 #include "s5h1420.h"
25 #include "s5h1420_priv.h"
26
27 #define TONE_FREQ 22000
28
29 struct s5h1420_state {
30 struct i2c_adapter* i2c;
31 const struct s5h1420_config* config;
32
33 struct dvb_frontend frontend;
34 struct i2c_adapter tuner_i2c_adapter;
35
36 u8 CON_1_val;
37
38 u8 postlocked:1;
39 u32 fclk;
40 u32 tunedfreq;
41 enum fe_code_rate fec_inner;
42 u32 symbol_rate;
43
44 /* FIXME: ugly workaround for flexcop's incapable i2c-controller
45 * it does not support repeated-start, workaround: write addr-1
46 * and then read
47 */
48 u8 shadow[256];
49 };
50
51 static u32 s5h1420_getsymbolrate(struct s5h1420_state* state);
52 static int s5h1420_get_tune_settings(struct dvb_frontend* fe,
53 struct dvb_frontend_tune_settings* fesettings);
54
55
56 static int debug;
57 module_param(debug, int, 0644);
58 MODULE_PARM_DESC(debug, "enable debugging");
59
60 #define dprintk(x...) do { \
61 if (debug) \
62 printk(KERN_DEBUG "S5H1420: " x); \
63 } while (0)
64
65 static u8 s5h1420_readreg(struct s5h1420_state *state, u8 reg)
66 {
67 int ret;
68 u8 b[2];
69 struct i2c_msg msg[] = {
70 { .addr = state->config->demod_address, .flags = 0, .buf = b, .len = 2 },
71 { .addr = state->config->demod_address, .flags = 0, .buf = &reg, .len = 1 },
72 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = 1 },
73 };
74
75 b[0] = (reg - 1) & 0xff;
76 b[1] = state->shadow[(reg - 1) & 0xff];
77
78 if (state->config->repeated_start_workaround) {
79 ret = i2c_transfer(state->i2c, msg, 3);
80 if (ret != 3)
81 return ret;
82 } else {
83 ret = i2c_transfer(state->i2c, &msg[1], 1);
84 if (ret != 1)
85 return ret;
86 ret = i2c_transfer(state->i2c, &msg[2], 1);
87 if (ret != 1)
88 return ret;
89 }
90
91 /* dprintk("rd(%02x): %02x %02x\n", state->config->demod_address, reg, b[0]); */
92
93 return b[0];
94 }
95
96 static int s5h1420_writereg (struct s5h1420_state* state, u8 reg, u8 data)
97 {
98 u8 buf[] = { reg, data };
99 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
100 int err;
101
102 /* dprintk("wr(%02x): %02x %02x\n", state->config->demod_address, reg, data); */
103 err = i2c_transfer(state->i2c, &msg, 1);
104 if (err != 1) {
105 dprintk("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data);
106 return -EREMOTEIO;
107 }
108 state->shadow[reg] = data;
109
110 return 0;
111 }
112
113 static int s5h1420_set_voltage(struct dvb_frontend *fe,
114 enum fe_sec_voltage voltage)
115 {
116 struct s5h1420_state* state = fe->demodulator_priv;
117
118 dprintk("enter %s\n", __func__);
119
120 switch(voltage) {
121 case SEC_VOLTAGE_13:
122 s5h1420_writereg(state, 0x3c,
123 (s5h1420_readreg(state, 0x3c) & 0xfe) | 0x02);
124 break;
125
126 case SEC_VOLTAGE_18:
127 s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) | 0x03);
128 break;
129
130 case SEC_VOLTAGE_OFF:
131 s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) & 0xfd);
132 break;
133 }
134
135 dprintk("leave %s\n", __func__);
136 return 0;
137 }
138
139 static int s5h1420_set_tone(struct dvb_frontend *fe,
140 enum fe_sec_tone_mode tone)
141 {
142 struct s5h1420_state* state = fe->demodulator_priv;
143
144 dprintk("enter %s\n", __func__);
145 switch(tone) {
146 case SEC_TONE_ON:
147 s5h1420_writereg(state, 0x3b,
148 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x08);
149 break;
150
151 case SEC_TONE_OFF:
152 s5h1420_writereg(state, 0x3b,
153 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x01);
154 break;
155 }
156 dprintk("leave %s\n", __func__);
157
158 return 0;
159 }
160
161 static int s5h1420_send_master_cmd (struct dvb_frontend* fe,
162 struct dvb_diseqc_master_cmd* cmd)
163 {
164 struct s5h1420_state* state = fe->demodulator_priv;
165 u8 val;
166 int i;
167 unsigned long timeout;
168 int result = 0;
169
170 dprintk("enter %s\n", __func__);
171 if (cmd->msg_len > sizeof(cmd->msg))
172 return -EINVAL;
173
174 /* setup for DISEQC */
175 val = s5h1420_readreg(state, 0x3b);
176 s5h1420_writereg(state, 0x3b, 0x02);
177 msleep(15);
178
179 /* write the DISEQC command bytes */
180 for(i=0; i< cmd->msg_len; i++) {
181 s5h1420_writereg(state, 0x3d + i, cmd->msg[i]);
182 }
183
184 /* kick off transmission */
185 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) |
186 ((cmd->msg_len-1) << 4) | 0x08);
187
188 /* wait for transmission to complete */
189 timeout = jiffies + ((100*HZ) / 1000);
190 while(time_before(jiffies, timeout)) {
191 if (!(s5h1420_readreg(state, 0x3b) & 0x08))
192 break;
193
194 msleep(5);
195 }
196 if (time_after(jiffies, timeout))
197 result = -ETIMEDOUT;
198
199 /* restore original settings */
200 s5h1420_writereg(state, 0x3b, val);
201 msleep(15);
202 dprintk("leave %s\n", __func__);
203 return result;
204 }
205
206 static int s5h1420_recv_slave_reply (struct dvb_frontend* fe,
207 struct dvb_diseqc_slave_reply* reply)
208 {
209 struct s5h1420_state* state = fe->demodulator_priv;
210 u8 val;
211 int i;
212 int length;
213 unsigned long timeout;
214 int result = 0;
215
216 /* setup for DISEQC receive */
217 val = s5h1420_readreg(state, 0x3b);
218 s5h1420_writereg(state, 0x3b, 0x82); /* FIXME: guess - do we need to set DIS_RDY(0x08) in receive mode? */
219 msleep(15);
220
221 /* wait for reception to complete */
222 timeout = jiffies + ((reply->timeout*HZ) / 1000);
223 while(time_before(jiffies, timeout)) {
224 if (!(s5h1420_readreg(state, 0x3b) & 0x80)) /* FIXME: do we test DIS_RDY(0x08) or RCV_EN(0x80)? */
225 break;
226
227 msleep(5);
228 }
229 if (time_after(jiffies, timeout)) {
230 result = -ETIMEDOUT;
231 goto exit;
232 }
233
234 /* check error flag - FIXME: not sure what this does - docs do not describe
235 * beyond "error flag for diseqc receive data :( */
236 if (s5h1420_readreg(state, 0x49)) {
237 result = -EIO;
238 goto exit;
239 }
240
241 /* check length */
242 length = (s5h1420_readreg(state, 0x3b) & 0x70) >> 4;
243 if (length > sizeof(reply->msg)) {
244 result = -EOVERFLOW;
245 goto exit;
246 }
247 reply->msg_len = length;
248
249 /* extract data */
250 for(i=0; i< length; i++) {
251 reply->msg[i] = s5h1420_readreg(state, 0x3d + i);
252 }
253
254 exit:
255 /* restore original settings */
256 s5h1420_writereg(state, 0x3b, val);
257 msleep(15);
258 return result;
259 }
260
261 static int s5h1420_send_burst(struct dvb_frontend *fe,
262 enum fe_sec_mini_cmd minicmd)
263 {
264 struct s5h1420_state* state = fe->demodulator_priv;
265 u8 val;
266 int result = 0;
267 unsigned long timeout;
268
269 /* setup for tone burst */
270 val = s5h1420_readreg(state, 0x3b);
271 s5h1420_writereg(state, 0x3b, (s5h1420_readreg(state, 0x3b) & 0x70) | 0x01);
272
273 /* set value for B position if requested */
274 if (minicmd == SEC_MINI_B) {
275 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x04);
276 }
277 msleep(15);
278
279 /* start transmission */
280 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x08);
281
282 /* wait for transmission to complete */
283 timeout = jiffies + ((100*HZ) / 1000);
284 while(time_before(jiffies, timeout)) {
285 if (!(s5h1420_readreg(state, 0x3b) & 0x08))
286 break;
287
288 msleep(5);
289 }
290 if (time_after(jiffies, timeout))
291 result = -ETIMEDOUT;
292
293 /* restore original settings */
294 s5h1420_writereg(state, 0x3b, val);
295 msleep(15);
296 return result;
297 }
298
299 static enum fe_status s5h1420_get_status_bits(struct s5h1420_state *state)
300 {
301 u8 val;
302 enum fe_status status = 0;
303
304 val = s5h1420_readreg(state, 0x14);
305 if (val & 0x02)
306 status |= FE_HAS_SIGNAL;
307 if (val & 0x01)
308 status |= FE_HAS_CARRIER;
309 val = s5h1420_readreg(state, 0x36);
310 if (val & 0x01)
311 status |= FE_HAS_VITERBI;
312 if (val & 0x20)
313 status |= FE_HAS_SYNC;
314 if (status == (FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|FE_HAS_SYNC))
315 status |= FE_HAS_LOCK;
316
317 return status;
318 }
319
320 static int s5h1420_read_status(struct dvb_frontend *fe,
321 enum fe_status *status)
322 {
323 struct s5h1420_state* state = fe->demodulator_priv;
324 u8 val;
325
326 dprintk("enter %s\n", __func__);
327
328 if (status == NULL)
329 return -EINVAL;
330
331 /* determine lock state */
332 *status = s5h1420_get_status_bits(state);
333
334 /* fix for FEC 5/6 inversion issue - if it doesn't quite lock, invert
335 the inversion, wait a bit and check again */
336 if (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI)) {
337 val = s5h1420_readreg(state, Vit10);
338 if ((val & 0x07) == 0x03) {
339 if (val & 0x08)
340 s5h1420_writereg(state, Vit09, 0x13);
341 else
342 s5h1420_writereg(state, Vit09, 0x1b);
343
344 /* wait a bit then update lock status */
345 mdelay(200);
346 *status = s5h1420_get_status_bits(state);
347 }
348 }
349
350 /* perform post lock setup */
351 if ((*status & FE_HAS_LOCK) && !state->postlocked) {
352
353 /* calculate the data rate */
354 u32 tmp = s5h1420_getsymbolrate(state);
355 switch (s5h1420_readreg(state, Vit10) & 0x07) {
356 case 0: tmp = (tmp * 2 * 1) / 2; break;
357 case 1: tmp = (tmp * 2 * 2) / 3; break;
358 case 2: tmp = (tmp * 2 * 3) / 4; break;
359 case 3: tmp = (tmp * 2 * 5) / 6; break;
360 case 4: tmp = (tmp * 2 * 6) / 7; break;
361 case 5: tmp = (tmp * 2 * 7) / 8; break;
362 }
363
364 if (tmp == 0) {
365 printk(KERN_ERR "s5h1420: avoided division by 0\n");
366 tmp = 1;
367 }
368 tmp = state->fclk / tmp;
369
370
371 /* set the MPEG_CLK_INTL for the calculated data rate */
372 if (tmp < 2)
373 val = 0x00;
374 else if (tmp < 5)
375 val = 0x01;
376 else if (tmp < 9)
377 val = 0x02;
378 else if (tmp < 13)
379 val = 0x03;
380 else if (tmp < 17)
381 val = 0x04;
382 else if (tmp < 25)
383 val = 0x05;
384 else if (tmp < 33)
385 val = 0x06;
386 else
387 val = 0x07;
388 dprintk("for MPEG_CLK_INTL %d %x\n", tmp, val);
389
390 s5h1420_writereg(state, FEC01, 0x18);
391 s5h1420_writereg(state, FEC01, 0x10);
392 s5h1420_writereg(state, FEC01, val);
393
394 /* Enable "MPEG_Out" */
395 val = s5h1420_readreg(state, Mpeg02);
396 s5h1420_writereg(state, Mpeg02, val | (1 << 6));
397
398 /* kicker disable */
399 val = s5h1420_readreg(state, QPSK01) & 0x7f;
400 s5h1420_writereg(state, QPSK01, val);
401
402 /* DC freeze TODO it was never activated by default or it can stay activated */
403
404 if (s5h1420_getsymbolrate(state) >= 20000000) {
405 s5h1420_writereg(state, Loop04, 0x8a);
406 s5h1420_writereg(state, Loop05, 0x6a);
407 } else {
408 s5h1420_writereg(state, Loop04, 0x58);
409 s5h1420_writereg(state, Loop05, 0x27);
410 }
411
412 /* post-lock processing has been done! */
413 state->postlocked = 1;
414 }
415
416 dprintk("leave %s\n", __func__);
417
418 return 0;
419 }
420
421 static int s5h1420_read_ber(struct dvb_frontend* fe, u32* ber)
422 {
423 struct s5h1420_state* state = fe->demodulator_priv;
424
425 s5h1420_writereg(state, 0x46, 0x1d);
426 mdelay(25);
427
428 *ber = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47);
429
430 return 0;
431 }
432
433 static int s5h1420_read_signal_strength(struct dvb_frontend* fe, u16* strength)
434 {
435 struct s5h1420_state* state = fe->demodulator_priv;
436
437 u8 val = s5h1420_readreg(state, 0x15);
438
439 *strength = (u16) ((val << 8) | val);
440
441 return 0;
442 }
443
444 static int s5h1420_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
445 {
446 struct s5h1420_state* state = fe->demodulator_priv;
447
448 s5h1420_writereg(state, 0x46, 0x1f);
449 mdelay(25);
450
451 *ucblocks = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47);
452
453 return 0;
454 }
455
456 static void s5h1420_reset(struct s5h1420_state* state)
457 {
458 dprintk("%s\n", __func__);
459 s5h1420_writereg (state, 0x01, 0x08);
460 s5h1420_writereg (state, 0x01, 0x00);
461 udelay(10);
462 }
463
464 static void s5h1420_setsymbolrate(struct s5h1420_state* state,
465 struct dtv_frontend_properties *p)
466 {
467 u8 v;
468 u64 val;
469
470 dprintk("enter %s\n", __func__);
471
472 val = ((u64) p->symbol_rate / 1000ULL) * (1ULL<<24);
473 if (p->symbol_rate < 29000000)
474 val *= 2;
475 do_div(val, (state->fclk / 1000));
476
477 dprintk("symbol rate register: %06llx\n", (unsigned long long)val);
478
479 v = s5h1420_readreg(state, Loop01);
480 s5h1420_writereg(state, Loop01, v & 0x7f);
481 s5h1420_writereg(state, Tnco01, val >> 16);
482 s5h1420_writereg(state, Tnco02, val >> 8);
483 s5h1420_writereg(state, Tnco03, val & 0xff);
484 s5h1420_writereg(state, Loop01, v | 0x80);
485 dprintk("leave %s\n", __func__);
486 }
487
488 static u32 s5h1420_getsymbolrate(struct s5h1420_state* state)
489 {
490 return state->symbol_rate;
491 }
492
493 static void s5h1420_setfreqoffset(struct s5h1420_state* state, int freqoffset)
494 {
495 int val;
496 u8 v;
497
498 dprintk("enter %s\n", __func__);
499
500 /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so
501 * divide fclk by 1000000 to get the correct value. */
502 val = -(int) ((freqoffset * (1<<24)) / (state->fclk / 1000000));
503
504 dprintk("phase rotator/freqoffset: %d %06x\n", freqoffset, val);
505
506 v = s5h1420_readreg(state, Loop01);
507 s5h1420_writereg(state, Loop01, v & 0xbf);
508 s5h1420_writereg(state, Pnco01, val >> 16);
509 s5h1420_writereg(state, Pnco02, val >> 8);
510 s5h1420_writereg(state, Pnco03, val & 0xff);
511 s5h1420_writereg(state, Loop01, v | 0x40);
512 dprintk("leave %s\n", __func__);
513 }
514
515 static int s5h1420_getfreqoffset(struct s5h1420_state* state)
516 {
517 int val;
518
519 s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) | 0x08);
520 val = s5h1420_readreg(state, 0x0e) << 16;
521 val |= s5h1420_readreg(state, 0x0f) << 8;
522 val |= s5h1420_readreg(state, 0x10);
523 s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) & 0xf7);
524
525 if (val & 0x800000)
526 val |= 0xff000000;
527
528 /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so
529 * divide fclk by 1000000 to get the correct value. */
530 val = (((-val) * (state->fclk/1000000)) / (1<<24));
531
532 return val;
533 }
534
535 static void s5h1420_setfec_inversion(struct s5h1420_state* state,
536 struct dtv_frontend_properties *p)
537 {
538 u8 inversion = 0;
539 u8 vit08, vit09;
540
541 dprintk("enter %s\n", __func__);
542
543 if (p->inversion == INVERSION_OFF)
544 inversion = state->config->invert ? 0x08 : 0;
545 else if (p->inversion == INVERSION_ON)
546 inversion = state->config->invert ? 0 : 0x08;
547
548 if ((p->fec_inner == FEC_AUTO) || (p->inversion == INVERSION_AUTO)) {
549 vit08 = 0x3f;
550 vit09 = 0;
551 } else {
552 switch (p->fec_inner) {
553 case FEC_1_2:
554 vit08 = 0x01;
555 vit09 = 0x10;
556 break;
557
558 case FEC_2_3:
559 vit08 = 0x02;
560 vit09 = 0x11;
561 break;
562
563 case FEC_3_4:
564 vit08 = 0x04;
565 vit09 = 0x12;
566 break;
567
568 case FEC_5_6:
569 vit08 = 0x08;
570 vit09 = 0x13;
571 break;
572
573 case FEC_6_7:
574 vit08 = 0x10;
575 vit09 = 0x14;
576 break;
577
578 case FEC_7_8:
579 vit08 = 0x20;
580 vit09 = 0x15;
581 break;
582
583 default:
584 return;
585 }
586 }
587 vit09 |= inversion;
588 dprintk("fec: %02x %02x\n", vit08, vit09);
589 s5h1420_writereg(state, Vit08, vit08);
590 s5h1420_writereg(state, Vit09, vit09);
591 dprintk("leave %s\n", __func__);
592 }
593
594 static enum fe_code_rate s5h1420_getfec(struct s5h1420_state *state)
595 {
596 switch(s5h1420_readreg(state, 0x32) & 0x07) {
597 case 0:
598 return FEC_1_2;
599
600 case 1:
601 return FEC_2_3;
602
603 case 2:
604 return FEC_3_4;
605
606 case 3:
607 return FEC_5_6;
608
609 case 4:
610 return FEC_6_7;
611
612 case 5:
613 return FEC_7_8;
614 }
615
616 return FEC_NONE;
617 }
618
619 static enum fe_spectral_inversion
620 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 {
630 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
631 struct s5h1420_state* state = fe->demodulator_priv;
632 int frequency_delta;
633 struct dvb_frontend_tune_settings fesettings;
634
635 dprintk("enter %s\n", __func__);
636
637 /* check if we should do a fast-tune */
638 s5h1420_get_tune_settings(fe, &fesettings);
639 frequency_delta = p->frequency - state->tunedfreq;
640 if ((frequency_delta > -fesettings.max_drift) &&
641 (frequency_delta < fesettings.max_drift) &&
642 (frequency_delta != 0) &&
643 (state->fec_inner == p->fec_inner) &&
644 (state->symbol_rate == p->symbol_rate)) {
645
646 if (fe->ops.tuner_ops.set_params) {
647 fe->ops.tuner_ops.set_params(fe);
648 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
649 }
650 if (fe->ops.tuner_ops.get_frequency) {
651 u32 tmp;
652 fe->ops.tuner_ops.get_frequency(fe, &tmp);
653 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
654 s5h1420_setfreqoffset(state, p->frequency - tmp);
655 } else {
656 s5h1420_setfreqoffset(state, 0);
657 }
658 dprintk("simple tune\n");
659 return 0;
660 }
661 dprintk("tuning demod\n");
662
663 /* first of all, software reset */
664 s5h1420_reset(state);
665
666 /* set s5h1420 fclk PLL according to desired symbol rate */
667 if (p->symbol_rate > 33000000)
668 state->fclk = 80000000;
669 else if (p->symbol_rate > 28500000)
670 state->fclk = 59000000;
671 else if (p->symbol_rate > 25000000)
672 state->fclk = 86000000;
673 else if (p->symbol_rate > 1900000)
674 state->fclk = 88000000;
675 else
676 state->fclk = 44000000;
677
678 dprintk("pll01: %d, ToneFreq: %d\n", state->fclk/1000000 - 8, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32));
679 s5h1420_writereg(state, PLL01, state->fclk/1000000 - 8);
680 s5h1420_writereg(state, PLL02, 0x40);
681 s5h1420_writereg(state, DiS01, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32));
682
683 /* TODO DC offset removal, config parameter ? */
684 if (p->symbol_rate > 29000000)
685 s5h1420_writereg(state, QPSK01, 0xae | 0x10);
686 else
687 s5h1420_writereg(state, QPSK01, 0xac | 0x10);
688
689 /* set misc registers */
690 s5h1420_writereg(state, CON_1, 0x00);
691 s5h1420_writereg(state, QPSK02, 0x00);
692 s5h1420_writereg(state, Pre01, 0xb0);
693
694 s5h1420_writereg(state, Loop01, 0xF0);
695 s5h1420_writereg(state, Loop02, 0x2a); /* e7 for s5h1420 */
696 s5h1420_writereg(state, Loop03, 0x79); /* 78 for s5h1420 */
697 if (p->symbol_rate > 20000000)
698 s5h1420_writereg(state, Loop04, 0x79);
699 else
700 s5h1420_writereg(state, Loop04, 0x58);
701 s5h1420_writereg(state, Loop05, 0x6b);
702
703 if (p->symbol_rate >= 8000000)
704 s5h1420_writereg(state, Post01, (0 << 6) | 0x10);
705 else if (p->symbol_rate >= 4000000)
706 s5h1420_writereg(state, Post01, (1 << 6) | 0x10);
707 else
708 s5h1420_writereg(state, Post01, (3 << 6) | 0x10);
709
710 s5h1420_writereg(state, Monitor12, 0x00); /* unfreeze DC compensation */
711
712 s5h1420_writereg(state, Sync01, 0x33);
713 s5h1420_writereg(state, Mpeg01, state->config->cdclk_polarity);
714 s5h1420_writereg(state, Mpeg02, 0x3d); /* Parallel output more, disabled -> enabled later */
715 s5h1420_writereg(state, Err01, 0x03); /* 0x1d for s5h1420 */
716
717 s5h1420_writereg(state, Vit06, 0x6e); /* 0x8e for s5h1420 */
718 s5h1420_writereg(state, DiS03, 0x00);
719 s5h1420_writereg(state, Rf01, 0x61); /* Tuner i2c address - for the gate controller */
720
721 /* set tuner PLL */
722 if (fe->ops.tuner_ops.set_params) {
723 fe->ops.tuner_ops.set_params(fe);
724 if (fe->ops.i2c_gate_ctrl)
725 fe->ops.i2c_gate_ctrl(fe, 0);
726 s5h1420_setfreqoffset(state, 0);
727 }
728
729 /* set the reset of the parameters */
730 s5h1420_setsymbolrate(state, p);
731 s5h1420_setfec_inversion(state, p);
732
733 /* start QPSK */
734 s5h1420_writereg(state, QPSK01, s5h1420_readreg(state, QPSK01) | 1);
735
736 state->fec_inner = p->fec_inner;
737 state->symbol_rate = p->symbol_rate;
738 state->postlocked = 0;
739 state->tunedfreq = p->frequency;
740
741 dprintk("leave %s\n", __func__);
742 return 0;
743 }
744
745 static int s5h1420_get_frontend(struct dvb_frontend* fe,
746 struct dtv_frontend_properties *p)
747 {
748 struct s5h1420_state* state = fe->demodulator_priv;
749
750 p->frequency = state->tunedfreq + s5h1420_getfreqoffset(state);
751 p->inversion = s5h1420_getinversion(state);
752 p->symbol_rate = s5h1420_getsymbolrate(state);
753 p->fec_inner = s5h1420_getfec(state);
754
755 return 0;
756 }
757
758 static int s5h1420_get_tune_settings(struct dvb_frontend* fe,
759 struct dvb_frontend_tune_settings* fesettings)
760 {
761 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
762 if (p->symbol_rate > 20000000) {
763 fesettings->min_delay_ms = 50;
764 fesettings->step_size = 2000;
765 fesettings->max_drift = 8000;
766 } else if (p->symbol_rate > 12000000) {
767 fesettings->min_delay_ms = 100;
768 fesettings->step_size = 1500;
769 fesettings->max_drift = 9000;
770 } else if (p->symbol_rate > 8000000) {
771 fesettings->min_delay_ms = 100;
772 fesettings->step_size = 1000;
773 fesettings->max_drift = 8000;
774 } else if (p->symbol_rate > 4000000) {
775 fesettings->min_delay_ms = 100;
776 fesettings->step_size = 500;
777 fesettings->max_drift = 7000;
778 } else if (p->symbol_rate > 2000000) {
779 fesettings->min_delay_ms = 200;
780 fesettings->step_size = (p->symbol_rate / 8000);
781 fesettings->max_drift = 14 * fesettings->step_size;
782 } else {
783 fesettings->min_delay_ms = 200;
784 fesettings->step_size = (p->symbol_rate / 8000);
785 fesettings->max_drift = 18 * fesettings->step_size;
786 }
787
788 return 0;
789 }
790
791 static int s5h1420_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
792 {
793 struct s5h1420_state* state = fe->demodulator_priv;
794
795 if (enable)
796 return s5h1420_writereg(state, 0x02, state->CON_1_val | 1);
797 else
798 return s5h1420_writereg(state, 0x02, state->CON_1_val & 0xfe);
799 }
800
801 static int s5h1420_init (struct dvb_frontend* fe)
802 {
803 struct s5h1420_state* state = fe->demodulator_priv;
804
805 /* disable power down and do reset */
806 state->CON_1_val = state->config->serial_mpeg << 4;
807 s5h1420_writereg(state, 0x02, state->CON_1_val);
808 msleep(10);
809 s5h1420_reset(state);
810
811 return 0;
812 }
813
814 static int s5h1420_sleep(struct dvb_frontend* fe)
815 {
816 struct s5h1420_state* state = fe->demodulator_priv;
817 state->CON_1_val = 0x12;
818 return s5h1420_writereg(state, 0x02, state->CON_1_val);
819 }
820
821 static void s5h1420_release(struct dvb_frontend* fe)
822 {
823 struct s5h1420_state* state = fe->demodulator_priv;
824 i2c_del_adapter(&state->tuner_i2c_adapter);
825 kfree(state);
826 }
827
828 static u32 s5h1420_tuner_i2c_func(struct i2c_adapter *adapter)
829 {
830 return I2C_FUNC_I2C;
831 }
832
833 static int s5h1420_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num)
834 {
835 struct s5h1420_state *state = i2c_get_adapdata(i2c_adap);
836 struct i2c_msg m[3];
837 u8 tx_open[2] = { CON_1, state->CON_1_val | 1 }; /* repeater stops once there was a stop condition */
838
839 if (1 + num > ARRAY_SIZE(m)) {
840 printk(KERN_WARNING
841 "%s: i2c xfer: num=%d is too big!\n",
842 KBUILD_MODNAME, num);
843 return -EOPNOTSUPP;
844 }
845
846 memset(m, 0, sizeof(struct i2c_msg) * (1 + num));
847
848 m[0].addr = state->config->demod_address;
849 m[0].buf = tx_open;
850 m[0].len = 2;
851
852 memcpy(&m[1], msg, sizeof(struct i2c_msg) * num);
853
854 return i2c_transfer(state->i2c, m, 1 + num) == 1 + num ? num : -EIO;
855 }
856
857 static const struct i2c_algorithm s5h1420_tuner_i2c_algo = {
858 .master_xfer = s5h1420_tuner_i2c_tuner_xfer,
859 .functionality = s5h1420_tuner_i2c_func,
860 };
861
862 struct i2c_adapter *s5h1420_get_tuner_i2c_adapter(struct dvb_frontend *fe)
863 {
864 struct s5h1420_state *state = fe->demodulator_priv;
865 return &state->tuner_i2c_adapter;
866 }
867 EXPORT_SYMBOL(s5h1420_get_tuner_i2c_adapter);
868
869 static const struct dvb_frontend_ops s5h1420_ops;
870
871 struct dvb_frontend *s5h1420_attach(const struct s5h1420_config *config,
872 struct i2c_adapter *i2c)
873 {
874 /* allocate memory for the internal state */
875 struct s5h1420_state *state = kzalloc(sizeof(struct s5h1420_state), GFP_KERNEL);
876 u8 i;
877
878 if (state == NULL)
879 goto error;
880
881 /* setup the state */
882 state->config = config;
883 state->i2c = i2c;
884 state->postlocked = 0;
885 state->fclk = 88000000;
886 state->tunedfreq = 0;
887 state->fec_inner = FEC_NONE;
888 state->symbol_rate = 0;
889
890 /* check if the demod is there + identify it */
891 i = s5h1420_readreg(state, ID01);
892 if (i != 0x03)
893 goto error;
894
895 memset(state->shadow, 0xff, sizeof(state->shadow));
896
897 for (i = 0; i < 0x50; i++)
898 state->shadow[i] = s5h1420_readreg(state, i);
899
900 /* create dvb_frontend */
901 memcpy(&state->frontend.ops, &s5h1420_ops, sizeof(struct dvb_frontend_ops));
902 state->frontend.demodulator_priv = state;
903
904 /* create tuner i2c adapter */
905 strscpy(state->tuner_i2c_adapter.name, "S5H1420-PN1010 tuner I2C bus",
906 sizeof(state->tuner_i2c_adapter.name));
907 state->tuner_i2c_adapter.algo = &s5h1420_tuner_i2c_algo;
908 state->tuner_i2c_adapter.algo_data = NULL;
909 i2c_set_adapdata(&state->tuner_i2c_adapter, state);
910 if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) {
911 printk(KERN_ERR "S5H1420/PN1010: tuner i2c bus could not be initialized\n");
912 goto error;
913 }
914
915 return &state->frontend;
916
917 error:
918 kfree(state);
919 return NULL;
920 }
921 EXPORT_SYMBOL(s5h1420_attach);
922
923 static const struct dvb_frontend_ops s5h1420_ops = {
924 .delsys = { SYS_DVBS },
925 .info = {
926 .name = "Samsung S5H1420/PnpNetwork PN1010 DVB-S",
927 .frequency_min_hz = 950 * MHz,
928 .frequency_max_hz = 2150 * MHz,
929 .frequency_stepsize_hz = 125 * kHz,
930 .frequency_tolerance_hz = 29500 * kHz,
931 .symbol_rate_min = 1000000,
932 .symbol_rate_max = 45000000,
933 /* .symbol_rate_tolerance = ???,*/
934 .caps = FE_CAN_INVERSION_AUTO |
935 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
936 FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
937 FE_CAN_QPSK
938 },
939
940 .release = s5h1420_release,
941
942 .init = s5h1420_init,
943 .sleep = s5h1420_sleep,
944 .i2c_gate_ctrl = s5h1420_i2c_gate_ctrl,
945
946 .set_frontend = s5h1420_set_frontend,
947 .get_frontend = s5h1420_get_frontend,
948 .get_tune_settings = s5h1420_get_tune_settings,
949
950 .read_status = s5h1420_read_status,
951 .read_ber = s5h1420_read_ber,
952 .read_signal_strength = s5h1420_read_signal_strength,
953 .read_ucblocks = s5h1420_read_ucblocks,
954
955 .diseqc_send_master_cmd = s5h1420_send_master_cmd,
956 .diseqc_recv_slave_reply = s5h1420_recv_slave_reply,
957 .diseqc_send_burst = s5h1420_send_burst,
958 .set_tone = s5h1420_set_tone,
959 .set_voltage = s5h1420_set_voltage,
960 };
961
962 MODULE_DESCRIPTION("Samsung S5H1420/PnpNetwork PN1010 DVB-S Demodulator driver");
963 MODULE_AUTHOR("Andrew de Quincey, Patrick Boettcher");
964 MODULE_LICENSE("GPL");
Linux with added FPC-III support