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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / media / dvb / frontends / s5h1420.c
blob2322257c69ae33bb5af5ed2ea200b82a671ff18a
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[256];
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], 1);
98 if (ret != 1)
99 return ret;
100 ret = i2c_transfer(state->i2c, &msg[2], 1);
101 if (ret != 1)
102 return ret;
103 }
104
105 /* dprintk("rd(%02x): %02x %02x\n", state->config->demod_address, reg, b[0]); */
106
107 return b[0];
108 }
109
110 static int s5h1420_writereg (struct s5h1420_state* state, u8 reg, u8 data)
111 {
112 u8 buf[] = { reg, data };
113 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
114 int err;
115
116 /* dprintk("wr(%02x): %02x %02x\n", state->config->demod_address, reg, data); */
117 err = i2c_transfer(state->i2c, &msg, 1);
118 if (err != 1) {
119 dprintk("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data);
120 return -EREMOTEIO;
121 }
122 state->shadow[reg] = data;
123
124 return 0;
125 }
126
127 static int s5h1420_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
128 {
129 struct s5h1420_state* state = fe->demodulator_priv;
130
131 dprintk("enter %s\n", __func__);
132
133 switch(voltage) {
134 case SEC_VOLTAGE_13:
135 s5h1420_writereg(state, 0x3c,
136 (s5h1420_readreg(state, 0x3c) & 0xfe) | 0x02);
137 break;
138
139 case SEC_VOLTAGE_18:
140 s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) | 0x03);
141 break;
142
143 case SEC_VOLTAGE_OFF:
144 s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) & 0xfd);
145 break;
146 }
147
148 dprintk("leave %s\n", __func__);
149 return 0;
150 }
151
152 static int s5h1420_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
153 {
154 struct s5h1420_state* state = fe->demodulator_priv;
155
156 dprintk("enter %s\n", __func__);
157 switch(tone) {
158 case SEC_TONE_ON:
159 s5h1420_writereg(state, 0x3b,
160 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x08);
161 break;
162
163 case SEC_TONE_OFF:
164 s5h1420_writereg(state, 0x3b,
165 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x01);
166 break;
167 }
168 dprintk("leave %s\n", __func__);
169
170 return 0;
171 }
172
173 static int s5h1420_send_master_cmd (struct dvb_frontend* fe,
174 struct dvb_diseqc_master_cmd* cmd)
175 {
176 struct s5h1420_state* state = fe->demodulator_priv;
177 u8 val;
178 int i;
179 unsigned long timeout;
180 int result = 0;
181
182 dprintk("enter %s\n", __func__);
183 if (cmd->msg_len > 8)
184 return -EINVAL;
185
186 /* setup for DISEQC */
187 val = s5h1420_readreg(state, 0x3b);
188 s5h1420_writereg(state, 0x3b, 0x02);
189 msleep(15);
190
191 /* write the DISEQC command bytes */
192 for(i=0; i< cmd->msg_len; i++) {
193 s5h1420_writereg(state, 0x3d + i, cmd->msg[i]);
194 }
195
196 /* kick off transmission */
197 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) |
198 ((cmd->msg_len-1) << 4) | 0x08);
199
200 /* wait for transmission to complete */
201 timeout = jiffies + ((100*HZ) / 1000);
202 while(time_before(jiffies, timeout)) {
203 if (!(s5h1420_readreg(state, 0x3b) & 0x08))
204 break;
205
206 msleep(5);
207 }
208 if (time_after(jiffies, timeout))
209 result = -ETIMEDOUT;
210
211 /* restore original settings */
212 s5h1420_writereg(state, 0x3b, val);
213 msleep(15);
214 dprintk("leave %s\n", __func__);
215 return result;
216 }
217
218 static int s5h1420_recv_slave_reply (struct dvb_frontend* fe,
219 struct dvb_diseqc_slave_reply* reply)
220 {
221 struct s5h1420_state* state = fe->demodulator_priv;
222 u8 val;
223 int i;
224 int length;
225 unsigned long timeout;
226 int result = 0;
227
228 /* setup for DISEQC receive */
229 val = s5h1420_readreg(state, 0x3b);
230 s5h1420_writereg(state, 0x3b, 0x82); /* FIXME: guess - do we need to set DIS_RDY(0x08) in receive mode? */
231 msleep(15);
232
233 /* wait for reception to complete */
234 timeout = jiffies + ((reply->timeout*HZ) / 1000);
235 while(time_before(jiffies, timeout)) {
236 if (!(s5h1420_readreg(state, 0x3b) & 0x80)) /* FIXME: do we test DIS_RDY(0x08) or RCV_EN(0x80)? */
237 break;
238
239 msleep(5);
240 }
241 if (time_after(jiffies, timeout)) {
242 result = -ETIMEDOUT;
243 goto exit;
244 }
245
246 /* check error flag - FIXME: not sure what this does - docs do not describe
247 * beyond "error flag for diseqc receive data :( */
248 if (s5h1420_readreg(state, 0x49)) {
249 result = -EIO;
250 goto exit;
251 }
252
253 /* check length */
254 length = (s5h1420_readreg(state, 0x3b) & 0x70) >> 4;
255 if (length > sizeof(reply->msg)) {
256 result = -EOVERFLOW;
257 goto exit;
258 }
259 reply->msg_len = length;
260
261 /* extract data */
262 for(i=0; i< length; i++) {
263 reply->msg[i] = s5h1420_readreg(state, 0x3d + i);
264 }
265
266 exit:
267 /* restore original settings */
268 s5h1420_writereg(state, 0x3b, val);
269 msleep(15);
270 return result;
271 }
272
273 static int s5h1420_send_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd)
274 {
275 struct s5h1420_state* state = fe->demodulator_priv;
276 u8 val;
277 int result = 0;
278 unsigned long timeout;
279
280 /* setup for tone burst */
281 val = s5h1420_readreg(state, 0x3b);
282 s5h1420_writereg(state, 0x3b, (s5h1420_readreg(state, 0x3b) & 0x70) | 0x01);
283
284 /* set value for B position if requested */
285 if (minicmd == SEC_MINI_B) {
286 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x04);
287 }
288 msleep(15);
289
290 /* start transmission */
291 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x08);
292
293 /* wait for transmission to complete */
294 timeout = jiffies + ((100*HZ) / 1000);
295 while(time_before(jiffies, timeout)) {
296 if (!(s5h1420_readreg(state, 0x3b) & 0x08))
297 break;
298
299 msleep(5);
300 }
301 if (time_after(jiffies, timeout))
302 result = -ETIMEDOUT;
303
304 /* restore original settings */
305 s5h1420_writereg(state, 0x3b, val);
306 msleep(15);
307 return result;
308 }
309
310 static fe_status_t s5h1420_get_status_bits(struct s5h1420_state* state)
311 {
312 u8 val;
313 fe_status_t status = 0;
314
315 val = s5h1420_readreg(state, 0x14);
316 if (val & 0x02)
317 status |= FE_HAS_SIGNAL;
318 if (val & 0x01)
319 status |= FE_HAS_CARRIER;
320 val = s5h1420_readreg(state, 0x36);
321 if (val & 0x01)
322 status |= FE_HAS_VITERBI;
323 if (val & 0x20)
324 status |= FE_HAS_SYNC;
325 if (status == (FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|FE_HAS_SYNC))
326 status |= FE_HAS_LOCK;
327
328 return status;
329 }
330
331 static int s5h1420_read_status(struct dvb_frontend* fe, fe_status_t* status)
332 {
333 struct s5h1420_state* state = fe->demodulator_priv;
334 u8 val;
335
336 dprintk("enter %s\n", __func__);
337
338 if (status == NULL)
339 return -EINVAL;
340
341 /* determine lock state */
342 *status = s5h1420_get_status_bits(state);
343
344 /* fix for FEC 5/6 inversion issue - if it doesn't quite lock, invert
345 the inversion, wait a bit and check again */
346 if (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI)) {
347 val = s5h1420_readreg(state, Vit10);
348 if ((val & 0x07) == 0x03) {
349 if (val & 0x08)
350 s5h1420_writereg(state, Vit09, 0x13);
351 else
352 s5h1420_writereg(state, Vit09, 0x1b);
353
354 /* wait a bit then update lock status */
355 mdelay(200);
356 *status = s5h1420_get_status_bits(state);
357 }
358 }
359
360 /* perform post lock setup */
361 if ((*status & FE_HAS_LOCK) && !state->postlocked) {
362
363 /* calculate the data rate */
364 u32 tmp = s5h1420_getsymbolrate(state);
365 switch (s5h1420_readreg(state, Vit10) & 0x07) {
366 case 0: tmp = (tmp * 2 * 1) / 2; break;
367 case 1: tmp = (tmp * 2 * 2) / 3; break;
368 case 2: tmp = (tmp * 2 * 3) / 4; break;
369 case 3: tmp = (tmp * 2 * 5) / 6; break;
370 case 4: tmp = (tmp * 2 * 6) / 7; break;
371 case 5: tmp = (tmp * 2 * 7) / 8; break;
372 }
373
374 if (tmp == 0) {
375 printk(KERN_ERR "s5h1420: avoided division by 0\n");
376 tmp = 1;
377 }
378 tmp = state->fclk / tmp;
379
380
381 /* set the MPEG_CLK_INTL for the calculated data rate */
382 if (tmp < 2)
383 val = 0x00;
384 else if (tmp < 5)
385 val = 0x01;
386 else if (tmp < 9)
387 val = 0x02;
388 else if (tmp < 13)
389 val = 0x03;
390 else if (tmp < 17)
391 val = 0x04;
392 else if (tmp < 25)
393 val = 0x05;
394 else if (tmp < 33)
395 val = 0x06;
396 else
397 val = 0x07;
398 dprintk("for MPEG_CLK_INTL %d %x\n", tmp, val);
399
400 s5h1420_writereg(state, FEC01, 0x18);
401 s5h1420_writereg(state, FEC01, 0x10);
402 s5h1420_writereg(state, FEC01, val);
403
404 /* Enable "MPEG_Out" */
405 val = s5h1420_readreg(state, Mpeg02);
406 s5h1420_writereg(state, Mpeg02, val | (1 << 6));
407
408 /* kicker disable */
409 val = s5h1420_readreg(state, QPSK01) & 0x7f;
410 s5h1420_writereg(state, QPSK01, val);
411
412 /* DC freeze TODO it was never activated by default or it can stay activated */
413
414 if (s5h1420_getsymbolrate(state) >= 20000000) {
415 s5h1420_writereg(state, Loop04, 0x8a);
416 s5h1420_writereg(state, Loop05, 0x6a);
417 } else {
418 s5h1420_writereg(state, Loop04, 0x58);
419 s5h1420_writereg(state, Loop05, 0x27);
420 }
421
422 /* post-lock processing has been done! */
423 state->postlocked = 1;
424 }
425
426 dprintk("leave %s\n", __func__);
427
428 return 0;
429 }
430
431 static int s5h1420_read_ber(struct dvb_frontend* fe, u32* ber)
432 {
433 struct s5h1420_state* state = fe->demodulator_priv;
434
435 s5h1420_writereg(state, 0x46, 0x1d);
436 mdelay(25);
437
438 *ber = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47);
439
440 return 0;
441 }
442
443 static int s5h1420_read_signal_strength(struct dvb_frontend* fe, u16* strength)
444 {
445 struct s5h1420_state* state = fe->demodulator_priv;
446
447 u8 val = s5h1420_readreg(state, 0x15);
448
449 *strength = (u16) ((val << 8) | val);
450
451 return 0;
452 }
453
454 static int s5h1420_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
455 {
456 struct s5h1420_state* state = fe->demodulator_priv;
457
458 s5h1420_writereg(state, 0x46, 0x1f);
459 mdelay(25);
460
461 *ucblocks = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47);
462
463 return 0;
464 }
465
466 static void s5h1420_reset(struct s5h1420_state* state)
467 {
468 dprintk("%s\n", __func__);
469 s5h1420_writereg (state, 0x01, 0x08);
470 s5h1420_writereg (state, 0x01, 0x00);
471 udelay(10);
472 }
473
474 static void s5h1420_setsymbolrate(struct s5h1420_state* state,
475 struct dtv_frontend_properties *p)
476 {
477 u8 v;
478 u64 val;
479
480 dprintk("enter %s\n", __func__);
481
482 val = ((u64) p->symbol_rate / 1000ULL) * (1ULL<<24);
483 if (p->symbol_rate < 29000000)
484 val *= 2;
485 do_div(val, (state->fclk / 1000));
486
487 dprintk("symbol rate register: %06llx\n", (unsigned long long)val);
488
489 v = s5h1420_readreg(state, Loop01);
490 s5h1420_writereg(state, Loop01, v & 0x7f);
491 s5h1420_writereg(state, Tnco01, val >> 16);
492 s5h1420_writereg(state, Tnco02, val >> 8);
493 s5h1420_writereg(state, Tnco03, val & 0xff);
494 s5h1420_writereg(state, Loop01, v | 0x80);
495 dprintk("leave %s\n", __func__);
496 }
497
498 static u32 s5h1420_getsymbolrate(struct s5h1420_state* state)
499 {
500 return state->symbol_rate;
501 }
502
503 static void s5h1420_setfreqoffset(struct s5h1420_state* state, int freqoffset)
504 {
505 int val;
506 u8 v;
507
508 dprintk("enter %s\n", __func__);
509
510 /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so
511 * divide fclk by 1000000 to get the correct value. */
512 val = -(int) ((freqoffset * (1<<24)) / (state->fclk / 1000000));
513
514 dprintk("phase rotator/freqoffset: %d %06x\n", freqoffset, val);
515
516 v = s5h1420_readreg(state, Loop01);
517 s5h1420_writereg(state, Loop01, v & 0xbf);
518 s5h1420_writereg(state, Pnco01, val >> 16);
519 s5h1420_writereg(state, Pnco02, val >> 8);
520 s5h1420_writereg(state, Pnco03, val & 0xff);
521 s5h1420_writereg(state, Loop01, v | 0x40);
522 dprintk("leave %s\n", __func__);
523 }
524
525 static int s5h1420_getfreqoffset(struct s5h1420_state* state)
526 {
527 int val;
528
529 s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) | 0x08);
530 val = s5h1420_readreg(state, 0x0e) << 16;
531 val |= s5h1420_readreg(state, 0x0f) << 8;
532 val |= s5h1420_readreg(state, 0x10);
533 s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) & 0xf7);
534
535 if (val & 0x800000)
536 val |= 0xff000000;
537
538 /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so
539 * divide fclk by 1000000 to get the correct value. */
540 val = (((-val) * (state->fclk/1000000)) / (1<<24));
541
542 return val;
543 }
544
545 static void s5h1420_setfec_inversion(struct s5h1420_state* state,
546 struct dtv_frontend_properties *p)
547 {
548 u8 inversion = 0;
549 u8 vit08, vit09;
550
551 dprintk("enter %s\n", __func__);
552
553 if (p->inversion == INVERSION_OFF)
554 inversion = state->config->invert ? 0x08 : 0;
555 else if (p->inversion == INVERSION_ON)
556 inversion = state->config->invert ? 0 : 0x08;
557
558 if ((p->fec_inner == FEC_AUTO) || (p->inversion == INVERSION_AUTO)) {
559 vit08 = 0x3f;
560 vit09 = 0;
561 } else {
562 switch (p->fec_inner) {
563 case FEC_1_2:
564 vit08 = 0x01; vit09 = 0x10;
565 break;
566
567 case FEC_2_3:
568 vit08 = 0x02; vit09 = 0x11;
569 break;
570
571 case FEC_3_4:
572 vit08 = 0x04; vit09 = 0x12;
573 break;
574
575 case FEC_5_6:
576 vit08 = 0x08; vit09 = 0x13;
577 break;
578
579 case FEC_6_7:
580 vit08 = 0x10; vit09 = 0x14;
581 break;
582
583 case FEC_7_8:
584 vit08 = 0x20; vit09 = 0x15;
585 break;
586
587 default:
588 return;
589 }
590 }
591 vit09 |= inversion;
592 dprintk("fec: %02x %02x\n", vit08, vit09);
593 s5h1420_writereg(state, Vit08, vit08);
594 s5h1420_writereg(state, Vit09, vit09);
595 dprintk("leave %s\n", __func__);
596 }
597
598 static fe_code_rate_t s5h1420_getfec(struct s5h1420_state* state)
599 {
600 switch(s5h1420_readreg(state, 0x32) & 0x07) {
601 case 0:
602 return FEC_1_2;
603
604 case 1:
605 return FEC_2_3;
606
607 case 2:
608 return FEC_3_4;
609
610 case 3:
611 return FEC_5_6;
612
613 case 4:
614 return FEC_6_7;
615
616 case 5:
617 return FEC_7_8;
618 }
619
620 return FEC_NONE;
621 }
622
623 static fe_spectral_inversion_t s5h1420_getinversion(struct s5h1420_state* state)
624 {
625 if (s5h1420_readreg(state, 0x32) & 0x08)
626 return INVERSION_ON;
627
628 return INVERSION_OFF;
629 }
630
631 static int s5h1420_set_frontend(struct dvb_frontend *fe)
632 {
633 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
634 struct s5h1420_state* state = fe->demodulator_priv;
635 int frequency_delta;
636 struct dvb_frontend_tune_settings fesettings;
637 uint8_t clock_setting;
638
639 dprintk("enter %s\n", __func__);
640
641 /* check if we should do a fast-tune */
642 s5h1420_get_tune_settings(fe, &fesettings);
643 frequency_delta = p->frequency - state->tunedfreq;
644 if ((frequency_delta > -fesettings.max_drift) &&
645 (frequency_delta < fesettings.max_drift) &&
646 (frequency_delta != 0) &&
647 (state->fec_inner == p->fec_inner) &&
648 (state->symbol_rate == p->symbol_rate)) {
649
650 if (fe->ops.tuner_ops.set_params) {
651 fe->ops.tuner_ops.set_params(fe);
652 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
653 }
654 if (fe->ops.tuner_ops.get_frequency) {
655 u32 tmp;
656 fe->ops.tuner_ops.get_frequency(fe, &tmp);
657 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
658 s5h1420_setfreqoffset(state, p->frequency - tmp);
659 } else {
660 s5h1420_setfreqoffset(state, 0);
661 }
662 dprintk("simple tune\n");
663 return 0;
664 }
665 dprintk("tuning demod\n");
666
667 /* first of all, software reset */
668 s5h1420_reset(state);
669
670 /* set s5h1420 fclk PLL according to desired symbol rate */
671 if (p->symbol_rate > 33000000)
672 state->fclk = 80000000;
673 else if (p->symbol_rate > 28500000)
674 state->fclk = 59000000;
675 else if (p->symbol_rate > 25000000)
676 state->fclk = 86000000;
677 else if (p->symbol_rate > 1900000)
678 state->fclk = 88000000;
679 else
680 state->fclk = 44000000;
681
682 /* Clock */
683 switch (state->fclk) {
684 default:
685 case 88000000:
686 clock_setting = 80;
687 break;
688 case 86000000:
689 clock_setting = 78;
690 break;
691 case 80000000:
692 clock_setting = 72;
693 break;
694 case 59000000:
695 clock_setting = 51;
696 break;
697 case 44000000:
698 clock_setting = 36;
699 break;
700 }
701 dprintk("pll01: %d, ToneFreq: %d\n", state->fclk/1000000 - 8, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32));
702 s5h1420_writereg(state, PLL01, state->fclk/1000000 - 8);
703 s5h1420_writereg(state, PLL02, 0x40);
704 s5h1420_writereg(state, DiS01, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32));
705
706 /* TODO DC offset removal, config parameter ? */
707 if (p->symbol_rate > 29000000)
708 s5h1420_writereg(state, QPSK01, 0xae | 0x10);
709 else
710 s5h1420_writereg(state, QPSK01, 0xac | 0x10);
711
712 /* set misc registers */
713 s5h1420_writereg(state, CON_1, 0x00);
714 s5h1420_writereg(state, QPSK02, 0x00);
715 s5h1420_writereg(state, Pre01, 0xb0);
716
717 s5h1420_writereg(state, Loop01, 0xF0);
718 s5h1420_writereg(state, Loop02, 0x2a); /* e7 for s5h1420 */
719 s5h1420_writereg(state, Loop03, 0x79); /* 78 for s5h1420 */
720 if (p->symbol_rate > 20000000)
721 s5h1420_writereg(state, Loop04, 0x79);
722 else
723 s5h1420_writereg(state, Loop04, 0x58);
724 s5h1420_writereg(state, Loop05, 0x6b);
725
726 if (p->symbol_rate >= 8000000)
727 s5h1420_writereg(state, Post01, (0 << 6) | 0x10);
728 else if (p->symbol_rate >= 4000000)
729 s5h1420_writereg(state, Post01, (1 << 6) | 0x10);
730 else
731 s5h1420_writereg(state, Post01, (3 << 6) | 0x10);
732
733 s5h1420_writereg(state, Monitor12, 0x00); /* unfreeze DC compensation */
734
735 s5h1420_writereg(state, Sync01, 0x33);
736 s5h1420_writereg(state, Mpeg01, state->config->cdclk_polarity);
737 s5h1420_writereg(state, Mpeg02, 0x3d); /* Parallel output more, disabled -> enabled later */
738 s5h1420_writereg(state, Err01, 0x03); /* 0x1d for s5h1420 */
739
740 s5h1420_writereg(state, Vit06, 0x6e); /* 0x8e for s5h1420 */
741 s5h1420_writereg(state, DiS03, 0x00);
742 s5h1420_writereg(state, Rf01, 0x61); /* Tuner i2c address - for the gate controller */
743
744 /* set tuner PLL */
745 if (fe->ops.tuner_ops.set_params) {
746 fe->ops.tuner_ops.set_params(fe);
747 if (fe->ops.i2c_gate_ctrl)
748 fe->ops.i2c_gate_ctrl(fe, 0);
749 s5h1420_setfreqoffset(state, 0);
750 }
751
752 /* set the reset of the parameters */
753 s5h1420_setsymbolrate(state, p);
754 s5h1420_setfec_inversion(state, p);
755
756 /* start QPSK */
757 s5h1420_writereg(state, QPSK01, s5h1420_readreg(state, QPSK01) | 1);
758
759 state->fec_inner = p->fec_inner;
760 state->symbol_rate = p->symbol_rate;
761 state->postlocked = 0;
762 state->tunedfreq = p->frequency;
763
764 dprintk("leave %s\n", __func__);
765 return 0;
766 }
767
768 static int s5h1420_get_frontend(struct dvb_frontend* fe)
769 {
770 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
771 struct s5h1420_state* state = fe->demodulator_priv;
772
773 p->frequency = state->tunedfreq + s5h1420_getfreqoffset(state);
774 p->inversion = s5h1420_getinversion(state);
775 p->symbol_rate = s5h1420_getsymbolrate(state);
776 p->fec_inner = s5h1420_getfec(state);
777
778 return 0;
779 }
780
781 static int s5h1420_get_tune_settings(struct dvb_frontend* fe,
782 struct dvb_frontend_tune_settings* fesettings)
783 {
784 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
785 if (p->symbol_rate > 20000000) {
786 fesettings->min_delay_ms = 50;
787 fesettings->step_size = 2000;
788 fesettings->max_drift = 8000;
789 } else if (p->symbol_rate > 12000000) {
790 fesettings->min_delay_ms = 100;
791 fesettings->step_size = 1500;
792 fesettings->max_drift = 9000;
793 } else if (p->symbol_rate > 8000000) {
794 fesettings->min_delay_ms = 100;
795 fesettings->step_size = 1000;
796 fesettings->max_drift = 8000;
797 } else if (p->symbol_rate > 4000000) {
798 fesettings->min_delay_ms = 100;
799 fesettings->step_size = 500;
800 fesettings->max_drift = 7000;
801 } else if (p->symbol_rate > 2000000) {
802 fesettings->min_delay_ms = 200;
803 fesettings->step_size = (p->symbol_rate / 8000);
804 fesettings->max_drift = 14 * fesettings->step_size;
805 } else {
806 fesettings->min_delay_ms = 200;
807 fesettings->step_size = (p->symbol_rate / 8000);
808 fesettings->max_drift = 18 * fesettings->step_size;
809 }
810
811 return 0;
812 }
813
814 static int s5h1420_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
815 {
816 struct s5h1420_state* state = fe->demodulator_priv;
817
818 if (enable)
819 return s5h1420_writereg(state, 0x02, state->CON_1_val | 1);
820 else
821 return s5h1420_writereg(state, 0x02, state->CON_1_val & 0xfe);
822 }
823
824 static int s5h1420_init (struct dvb_frontend* fe)
825 {
826 struct s5h1420_state* state = fe->demodulator_priv;
827
828 /* disable power down and do reset */
829 state->CON_1_val = state->config->serial_mpeg << 4;
830 s5h1420_writereg(state, 0x02, state->CON_1_val);
831 msleep(10);
832 s5h1420_reset(state);
833
834 return 0;
835 }
836
837 static int s5h1420_sleep(struct dvb_frontend* fe)
838 {
839 struct s5h1420_state* state = fe->demodulator_priv;
840 state->CON_1_val = 0x12;
841 return s5h1420_writereg(state, 0x02, state->CON_1_val);
842 }
843
844 static void s5h1420_release(struct dvb_frontend* fe)
845 {
846 struct s5h1420_state* state = fe->demodulator_priv;
847 i2c_del_adapter(&state->tuner_i2c_adapter);
848 kfree(state);
849 }
850
851 static u32 s5h1420_tuner_i2c_func(struct i2c_adapter *adapter)
852 {
853 return I2C_FUNC_I2C;
854 }
855
856 static int s5h1420_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num)
857 {
858 struct s5h1420_state *state = i2c_get_adapdata(i2c_adap);
859 struct i2c_msg m[1 + num];
860 u8 tx_open[2] = { CON_1, state->CON_1_val | 1 }; /* repeater stops once there was a stop condition */
861
862 memset(m, 0, sizeof(struct i2c_msg) * (1 + num));
863
864 m[0].addr = state->config->demod_address;
865 m[0].buf = tx_open;
866 m[0].len = 2;
867
868 memcpy(&m[1], msg, sizeof(struct i2c_msg) * num);
869
870 return i2c_transfer(state->i2c, m, 1+num) == 1 + num ? num : -EIO;
871 }
872
873 static struct i2c_algorithm s5h1420_tuner_i2c_algo = {
874 .master_xfer = s5h1420_tuner_i2c_tuner_xfer,
875 .functionality = s5h1420_tuner_i2c_func,
876 };
877
878 struct i2c_adapter *s5h1420_get_tuner_i2c_adapter(struct dvb_frontend *fe)
879 {
880 struct s5h1420_state *state = fe->demodulator_priv;
881 return &state->tuner_i2c_adapter;
882 }
883 EXPORT_SYMBOL(s5h1420_get_tuner_i2c_adapter);
884
885 static struct dvb_frontend_ops s5h1420_ops;
886
887 struct dvb_frontend *s5h1420_attach(const struct s5h1420_config *config,
888 struct i2c_adapter *i2c)
889 {
890 /* allocate memory for the internal state */
891 struct s5h1420_state *state = kzalloc(sizeof(struct s5h1420_state), GFP_KERNEL);
892 u8 i;
893
894 if (state == NULL)
895 goto error;
896
897 /* setup the state */
898 state->config = config;
899 state->i2c = i2c;
900 state->postlocked = 0;
901 state->fclk = 88000000;
902 state->tunedfreq = 0;
903 state->fec_inner = FEC_NONE;
904 state->symbol_rate = 0;
905
906 /* check if the demod is there + identify it */
907 i = s5h1420_readreg(state, ID01);
908 if (i != 0x03)
909 goto error;
910
911 memset(state->shadow, 0xff, sizeof(state->shadow));
912
913 for (i = 0; i < 0x50; i++)
914 state->shadow[i] = s5h1420_readreg(state, i);
915
916 /* create dvb_frontend */
917 memcpy(&state->frontend.ops, &s5h1420_ops, sizeof(struct dvb_frontend_ops));
918 state->frontend.demodulator_priv = state;
919
920 /* create tuner i2c adapter */
921 strlcpy(state->tuner_i2c_adapter.name, "S5H1420-PN1010 tuner I2C bus",
922 sizeof(state->tuner_i2c_adapter.name));
923 state->tuner_i2c_adapter.algo = &s5h1420_tuner_i2c_algo;
924 state->tuner_i2c_adapter.algo_data = NULL;
925 i2c_set_adapdata(&state->tuner_i2c_adapter, state);
926 if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) {
927 printk(KERN_ERR "S5H1420/PN1010: tuner i2c bus could not be initialized\n");
928 goto error;
929 }
930
931 return &state->frontend;
932
933 error:
934 kfree(state);
935 return NULL;
936 }
937 EXPORT_SYMBOL(s5h1420_attach);
938
939 static struct dvb_frontend_ops s5h1420_ops = {
940 .delsys = { SYS_DVBS },
941 .info = {
942 .name = "Samsung S5H1420/PnpNetwork PN1010 DVB-S",
943 .frequency_min = 950000,
944 .frequency_max = 2150000,
945 .frequency_stepsize = 125, /* kHz for QPSK frontends */
946 .frequency_tolerance = 29500,
947 .symbol_rate_min = 1000000,
948 .symbol_rate_max = 45000000,
949 /* .symbol_rate_tolerance = ???,*/
950 .caps = FE_CAN_INVERSION_AUTO |
951 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
952 FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
953 FE_CAN_QPSK
954 },
955
956 .release = s5h1420_release,
957
958 .init = s5h1420_init,
959 .sleep = s5h1420_sleep,
960 .i2c_gate_ctrl = s5h1420_i2c_gate_ctrl,
961
962 .set_frontend = s5h1420_set_frontend,
963 .get_frontend = s5h1420_get_frontend,
964 .get_tune_settings = s5h1420_get_tune_settings,
965
966 .read_status = s5h1420_read_status,
967 .read_ber = s5h1420_read_ber,
968 .read_signal_strength = s5h1420_read_signal_strength,
969 .read_ucblocks = s5h1420_read_ucblocks,
970
971 .diseqc_send_master_cmd = s5h1420_send_master_cmd,
972 .diseqc_recv_slave_reply = s5h1420_recv_slave_reply,
973 .diseqc_send_burst = s5h1420_send_burst,
974 .set_tone = s5h1420_set_tone,
975 .set_voltage = s5h1420_set_voltage,
976 };
977
978 MODULE_DESCRIPTION("Samsung S5H1420/PnpNetwork PN1010 DVB-S Demodulator driver");
979 MODULE_AUTHOR("Andrew de Quincey, Patrick Boettcher");
980 MODULE_LICENSE("GPL");