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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / media / dvb-frontends / cx24120.c
blob2464b63fe0cf4ed0053d4299a50e605506d5feb3
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 Conexant cx24120/cx24118 - DVBS/S2 Satellite demod/tuner driver
4
5 Copyright (C) 2008 Patrick Boettcher <pb@linuxtv.org>
6 Copyright (C) 2009 Sergey Tyurin <forum.free-x.de>
7 Updated 2012 by Jannis Achstetter <jannis_achstetter@web.de>
8 Copyright (C) 2015 Jemma Denson <jdenson@gmail.com>
9 April 2015
10 Refactored & simplified driver
11 Updated to work with delivery system supplied by DVBv5
12 Add frequency, fec & pilot to get_frontend
13
14 Cards supported: Technisat Skystar S2
15
16 */
17
18 #include <linux/slab.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/init.h>
23 #include <linux/firmware.h>
24 #include <media/dvb_frontend.h>
25 #include "cx24120.h"
26
27 #define CX24120_SEARCH_RANGE_KHZ 5000
28 #define CX24120_FIRMWARE "dvb-fe-cx24120-1.20.58.2.fw"
29
30 /* cx24120 i2c registers */
31 #define CX24120_REG_CMD_START 0x00 /* write cmd_id */
32 #define CX24120_REG_CMD_ARGS 0x01 /* write command arguments */
33 #define CX24120_REG_CMD_END 0x1f /* write 0x01 for end */
34
35 #define CX24120_REG_MAILBOX 0x33
36 #define CX24120_REG_FREQ3 0x34 /* frequency */
37 #define CX24120_REG_FREQ2 0x35
38 #define CX24120_REG_FREQ1 0x36
39
40 #define CX24120_REG_FECMODE 0x39 /* FEC status */
41 #define CX24120_REG_STATUS 0x3a /* Tuner status */
42 #define CX24120_REG_SIGSTR_H 0x3a /* Signal strength high */
43 #define CX24120_REG_SIGSTR_L 0x3b /* Signal strength low byte */
44 #define CX24120_REG_QUALITY_H 0x40 /* SNR high byte */
45 #define CX24120_REG_QUALITY_L 0x41 /* SNR low byte */
46
47 #define CX24120_REG_BER_HH 0x47 /* BER high byte of high word */
48 #define CX24120_REG_BER_HL 0x48 /* BER low byte of high word */
49 #define CX24120_REG_BER_LH 0x49 /* BER high byte of low word */
50 #define CX24120_REG_BER_LL 0x4a /* BER low byte of low word */
51
52 #define CX24120_REG_UCB_H 0x50 /* UCB high byte */
53 #define CX24120_REG_UCB_L 0x51 /* UCB low byte */
54
55 #define CX24120_REG_CLKDIV 0xe6
56 #define CX24120_REG_RATEDIV 0xf0
57
58 #define CX24120_REG_REVISION 0xff /* Chip revision (ro) */
59
60 /* Command messages */
61 enum command_message_id {
62 CMD_VCO_SET = 0x10, /* cmd.len = 12; */
63 CMD_TUNEREQUEST = 0x11, /* cmd.len = 15; */
64
65 CMD_MPEG_ONOFF = 0x13, /* cmd.len = 4; */
66 CMD_MPEG_INIT = 0x14, /* cmd.len = 7; */
67 CMD_BANDWIDTH = 0x15, /* cmd.len = 12; */
68 CMD_CLOCK_READ = 0x16, /* read clock */
69 CMD_CLOCK_SET = 0x17, /* cmd.len = 10; */
70
71 CMD_DISEQC_MSG1 = 0x20, /* cmd.len = 11; */
72 CMD_DISEQC_MSG2 = 0x21, /* cmd.len = d->msg_len + 6; */
73 CMD_SETVOLTAGE = 0x22, /* cmd.len = 2; */
74 CMD_SETTONE = 0x23, /* cmd.len = 4; */
75 CMD_DISEQC_BURST = 0x24, /* cmd.len not used !!! */
76
77 CMD_READ_SNR = 0x1a, /* Read signal strength */
78 CMD_START_TUNER = 0x1b, /* ??? */
79
80 CMD_FWVERSION = 0x35,
81
82 CMD_BER_CTRL = 0x3c, /* cmd.len = 0x03; */
83 };
84
85 #define CX24120_MAX_CMD_LEN 30
86
87 /* pilot mask */
88 #define CX24120_PILOT_OFF 0x00
89 #define CX24120_PILOT_ON 0x40
90 #define CX24120_PILOT_AUTO 0x80
91
92 /* signal status */
93 #define CX24120_HAS_SIGNAL 0x01
94 #define CX24120_HAS_CARRIER 0x02
95 #define CX24120_HAS_VITERBI 0x04
96 #define CX24120_HAS_LOCK 0x08
97 #define CX24120_HAS_UNK1 0x10
98 #define CX24120_HAS_UNK2 0x20
99 #define CX24120_STATUS_MASK 0x0f
100 #define CX24120_SIGNAL_MASK 0xc0
101
102 /* ber window */
103 #define CX24120_BER_WINDOW 16
104 #define CX24120_BER_WSIZE ((1 << CX24120_BER_WINDOW) * 208 * 8)
105
106 #define info(args...) pr_info("cx24120: " args)
107 #define err(args...) pr_err("cx24120: ### ERROR: " args)
108
109 /* The Demod/Tuner can't easily provide these, we cache them */
110 struct cx24120_tuning {
111 u32 frequency;
112 u32 symbol_rate;
113 enum fe_spectral_inversion inversion;
114 enum fe_code_rate fec;
115
116 enum fe_delivery_system delsys;
117 enum fe_modulation modulation;
118 enum fe_pilot pilot;
119
120 /* Demod values */
121 u8 fec_val;
122 u8 fec_mask;
123 u8 clkdiv;
124 u8 ratediv;
125 u8 inversion_val;
126 u8 pilot_val;
127 };
128
129 /* Private state */
130 struct cx24120_state {
131 struct i2c_adapter *i2c;
132 const struct cx24120_config *config;
133 struct dvb_frontend frontend;
134
135 u8 cold_init;
136 u8 mpeg_enabled;
137 u8 need_clock_set;
138
139 /* current and next tuning parameters */
140 struct cx24120_tuning dcur;
141 struct cx24120_tuning dnxt;
142
143 enum fe_status fe_status;
144
145 /* dvbv5 stats calculations */
146 u32 bitrate;
147 u32 berw_usecs;
148 u32 ber_prev;
149 u32 ucb_offset;
150 unsigned long ber_jiffies_stats;
151 unsigned long per_jiffies_stats;
152 };
153
154 /* Command message to firmware */
155 struct cx24120_cmd {
156 u8 id;
157 u8 len;
158 u8 arg[CX24120_MAX_CMD_LEN];
159 };
160
161 /* Read single register */
162 static int cx24120_readreg(struct cx24120_state *state, u8 reg)
163 {
164 int ret;
165 u8 buf = 0;
166 struct i2c_msg msg[] = {
167 {
168 .addr = state->config->i2c_addr,
169 .flags = 0,
170 .len = 1,
171 .buf = &reg
172 }, {
173 .addr = state->config->i2c_addr,
174 .flags = I2C_M_RD,
175 .len = 1,
176 .buf = &buf
177 }
178 };
179
180 ret = i2c_transfer(state->i2c, msg, 2);
181 if (ret != 2) {
182 err("Read error: reg=0x%02x, ret=%i)\n", reg, ret);
183 return ret;
184 }
185
186 dev_dbg(&state->i2c->dev, "reg=0x%02x; data=0x%02x\n", reg, buf);
187
188 return buf;
189 }
190
191 /* Write single register */
192 static int cx24120_writereg(struct cx24120_state *state, u8 reg, u8 data)
193 {
194 u8 buf[] = { reg, data };
195 struct i2c_msg msg = {
196 .addr = state->config->i2c_addr,
197 .flags = 0,
198 .buf = buf,
199 .len = 2
200 };
201 int ret;
202
203 ret = i2c_transfer(state->i2c, &msg, 1);
204 if (ret != 1) {
205 err("Write error: i2c_write error(err == %i, 0x%02x: 0x%02x)\n",
206 ret, reg, data);
207 return ret;
208 }
209
210 dev_dbg(&state->i2c->dev, "reg=0x%02x; data=0x%02x\n", reg, data);
211
212 return 0;
213 }
214
215 /* Write multiple registers in chunks of i2c_wr_max-sized buffers */
216 static int cx24120_writeregs(struct cx24120_state *state,
217 u8 reg, const u8 *values, u16 len, u8 incr)
218 {
219 int ret;
220 u16 max = state->config->i2c_wr_max > 0 ?
221 state->config->i2c_wr_max :
222 len;
223
224 struct i2c_msg msg = {
225 .addr = state->config->i2c_addr,
226 .flags = 0,
227 };
228
229 msg.buf = kmalloc(max + 1, GFP_KERNEL);
230 if (!msg.buf)
231 return -ENOMEM;
232
233 while (len) {
234 msg.buf[0] = reg;
235 msg.len = len > max ? max : len;
236 memcpy(&msg.buf[1], values, msg.len);
237
238 len -= msg.len; /* data length revers counter */
239 values += msg.len; /* incr data pointer */
240
241 if (incr)
242 reg += msg.len;
243 msg.len++; /* don't forget the addr byte */
244
245 ret = i2c_transfer(state->i2c, &msg, 1);
246 if (ret != 1) {
247 err("i2c_write error(err == %i, 0x%02x)\n", ret, reg);
248 goto out;
249 }
250
251 dev_dbg(&state->i2c->dev, "reg=0x%02x; data=%*ph\n",
252 reg, msg.len - 1, msg.buf + 1);
253 }
254
255 ret = 0;
256
257 out:
258 kfree(msg.buf);
259 return ret;
260 }
261
262 static const struct dvb_frontend_ops cx24120_ops;
263
264 struct dvb_frontend *cx24120_attach(const struct cx24120_config *config,
265 struct i2c_adapter *i2c)
266 {
267 struct cx24120_state *state;
268 int demod_rev;
269
270 info("Conexant cx24120/cx24118 - DVBS/S2 Satellite demod/tuner\n");
271 state = kzalloc(sizeof(*state), GFP_KERNEL);
272 if (!state) {
273 err("Unable to allocate memory for cx24120_state\n");
274 goto error;
275 }
276
277 /* setup the state */
278 state->config = config;
279 state->i2c = i2c;
280
281 /* check if the demod is present and has proper type */
282 demod_rev = cx24120_readreg(state, CX24120_REG_REVISION);
283 switch (demod_rev) {
284 case 0x07:
285 info("Demod cx24120 rev. 0x07 detected.\n");
286 break;
287 case 0x05:
288 info("Demod cx24120 rev. 0x05 detected.\n");
289 break;
290 default:
291 err("Unsupported demod revision: 0x%x detected.\n", demod_rev);
292 goto error;
293 }
294
295 /* create dvb_frontend */
296 state->cold_init = 0;
297 memcpy(&state->frontend.ops, &cx24120_ops,
298 sizeof(struct dvb_frontend_ops));
299 state->frontend.demodulator_priv = state;
300
301 info("Conexant cx24120/cx24118 attached.\n");
302 return &state->frontend;
303
304 error:
305 kfree(state);
306 return NULL;
307 }
308 EXPORT_SYMBOL(cx24120_attach);
309
310 static int cx24120_test_rom(struct cx24120_state *state)
311 {
312 int err, ret;
313
314 err = cx24120_readreg(state, 0xfd);
315 if (err & 4) {
316 ret = cx24120_readreg(state, 0xdf) & 0xfe;
317 err = cx24120_writereg(state, 0xdf, ret);
318 }
319 return err;
320 }
321
322 static int cx24120_read_snr(struct dvb_frontend *fe, u16 *snr)
323 {
324 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
325
326 if (c->cnr.stat[0].scale != FE_SCALE_DECIBEL)
327 *snr = 0;
328 else
329 *snr = div_s64(c->cnr.stat[0].svalue, 100);
330
331 return 0;
332 }
333
334 static int cx24120_read_ber(struct dvb_frontend *fe, u32 *ber)
335 {
336 struct cx24120_state *state = fe->demodulator_priv;
337 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
338
339 if (c->post_bit_error.stat[0].scale != FE_SCALE_COUNTER) {
340 *ber = 0;
341 return 0;
342 }
343
344 *ber = c->post_bit_error.stat[0].uvalue - state->ber_prev;
345 state->ber_prev = c->post_bit_error.stat[0].uvalue;
346
347 return 0;
348 }
349
350 static int cx24120_msg_mpeg_output_global_config(struct cx24120_state *state,
351 u8 flag);
352
353 /* Check if we're running a command that needs to disable mpeg out */
354 static void cx24120_check_cmd(struct cx24120_state *state, u8 id)
355 {
356 switch (id) {
357 case CMD_TUNEREQUEST:
358 case CMD_CLOCK_READ:
359 case CMD_DISEQC_MSG1:
360 case CMD_DISEQC_MSG2:
361 case CMD_SETVOLTAGE:
362 case CMD_SETTONE:
363 case CMD_DISEQC_BURST:
364 cx24120_msg_mpeg_output_global_config(state, 0);
365 /* Old driver would do a msleep(100) here */
366 default:
367 return;
368 }
369 }
370
371 /* Send a message to the firmware */
372 static int cx24120_message_send(struct cx24120_state *state,
373 struct cx24120_cmd *cmd)
374 {
375 int ficus;
376
377 if (state->mpeg_enabled) {
378 /* Disable mpeg out on certain commands */
379 cx24120_check_cmd(state, cmd->id);
380 }
381
382 cx24120_writereg(state, CX24120_REG_CMD_START, cmd->id);
383 cx24120_writeregs(state, CX24120_REG_CMD_ARGS, &cmd->arg[0],
384 cmd->len, 1);
385 cx24120_writereg(state, CX24120_REG_CMD_END, 0x01);
386
387 ficus = 1000;
388 while (cx24120_readreg(state, CX24120_REG_CMD_END)) {
389 msleep(20);
390 ficus -= 20;
391 if (ficus == 0) {
392 err("Error sending message to firmware\n");
393 return -EREMOTEIO;
394 }
395 }
396 dev_dbg(&state->i2c->dev, "sent message 0x%02x\n", cmd->id);
397
398 return 0;
399 }
400
401 /* Send a message and fill arg[] with the results */
402 static int cx24120_message_sendrcv(struct cx24120_state *state,
403 struct cx24120_cmd *cmd, u8 numreg)
404 {
405 int ret, i;
406
407 if (numreg > CX24120_MAX_CMD_LEN) {
408 err("Too many registers to read. cmd->reg = %d", numreg);
409 return -EREMOTEIO;
410 }
411
412 ret = cx24120_message_send(state, cmd);
413 if (ret != 0)
414 return ret;
415
416 if (!numreg)
417 return 0;
418
419 /* Read numreg registers starting from register cmd->len */
420 for (i = 0; i < numreg; i++)
421 cmd->arg[i] = cx24120_readreg(state, (cmd->len + i + 1));
422
423 return 0;
424 }
425
426 static int cx24120_read_signal_strength(struct dvb_frontend *fe,
427 u16 *signal_strength)
428 {
429 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
430
431 if (c->strength.stat[0].scale != FE_SCALE_RELATIVE)
432 *signal_strength = 0;
433 else
434 *signal_strength = c->strength.stat[0].uvalue;
435
436 return 0;
437 }
438
439 static int cx24120_msg_mpeg_output_global_config(struct cx24120_state *state,
440 u8 enable)
441 {
442 struct cx24120_cmd cmd;
443 int ret;
444
445 cmd.id = CMD_MPEG_ONOFF;
446 cmd.len = 4;
447 cmd.arg[0] = 0x01;
448 cmd.arg[1] = 0x00;
449 cmd.arg[2] = enable ? 0 : (u8)(-1);
450 cmd.arg[3] = 0x01;
451
452 ret = cx24120_message_send(state, &cmd);
453 if (ret != 0) {
454 dev_dbg(&state->i2c->dev, "failed to %s MPEG output\n",
455 enable ? "enable" : "disable");
456 return ret;
457 }
458
459 state->mpeg_enabled = enable;
460 dev_dbg(&state->i2c->dev, "MPEG output %s\n",
461 enable ? "enabled" : "disabled");
462
463 return 0;
464 }
465
466 static int cx24120_msg_mpeg_output_config(struct cx24120_state *state, u8 seq)
467 {
468 struct cx24120_cmd cmd;
469 struct cx24120_initial_mpeg_config i =
470 state->config->initial_mpeg_config;
471
472 cmd.id = CMD_MPEG_INIT;
473 cmd.len = 7;
474 cmd.arg[0] = seq; /* sequental number - can be 0,1,2 */
475 cmd.arg[1] = ((i.x1 & 0x01) << 1) | ((i.x1 >> 1) & 0x01);
476 cmd.arg[2] = 0x05;
477 cmd.arg[3] = 0x02;
478 cmd.arg[4] = ((i.x2 >> 1) & 0x01);
479 cmd.arg[5] = (i.x2 & 0xf0) | (i.x3 & 0x0f);
480 cmd.arg[6] = 0x10;
481
482 return cx24120_message_send(state, &cmd);
483 }
484
485 static int cx24120_diseqc_send_burst(struct dvb_frontend *fe,
486 enum fe_sec_mini_cmd burst)
487 {
488 struct cx24120_state *state = fe->demodulator_priv;
489 struct cx24120_cmd cmd;
490
491 dev_dbg(&state->i2c->dev, "\n");
492
493 /*
494 * Yes, cmd.len is set to zero. The old driver
495 * didn't specify any len, but also had a
496 * memset 0 before every use of the cmd struct
497 * which would have set it to zero.
498 * This quite probably needs looking into.
499 */
500 cmd.id = CMD_DISEQC_BURST;
501 cmd.len = 0;
502 cmd.arg[0] = 0x00;
503 cmd.arg[1] = (burst == SEC_MINI_B) ? 0x01 : 0x00;
504
505 return cx24120_message_send(state, &cmd);
506 }
507
508 static int cx24120_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
509 {
510 struct cx24120_state *state = fe->demodulator_priv;
511 struct cx24120_cmd cmd;
512
513 dev_dbg(&state->i2c->dev, "(%d)\n", tone);
514
515 if ((tone != SEC_TONE_ON) && (tone != SEC_TONE_OFF)) {
516 err("Invalid tone=%d\n", tone);
517 return -EINVAL;
518 }
519
520 cmd.id = CMD_SETTONE;
521 cmd.len = 4;
522 cmd.arg[0] = 0x00;
523 cmd.arg[1] = 0x00;
524 cmd.arg[2] = 0x00;
525 cmd.arg[3] = (tone == SEC_TONE_ON) ? 0x01 : 0x00;
526
527 return cx24120_message_send(state, &cmd);
528 }
529
530 static int cx24120_set_voltage(struct dvb_frontend *fe,
531 enum fe_sec_voltage voltage)
532 {
533 struct cx24120_state *state = fe->demodulator_priv;
534 struct cx24120_cmd cmd;
535
536 dev_dbg(&state->i2c->dev, "(%d)\n", voltage);
537
538 cmd.id = CMD_SETVOLTAGE;
539 cmd.len = 2;
540 cmd.arg[0] = 0x00;
541 cmd.arg[1] = (voltage == SEC_VOLTAGE_18) ? 0x01 : 0x00;
542
543 return cx24120_message_send(state, &cmd);
544 }
545
546 static int cx24120_send_diseqc_msg(struct dvb_frontend *fe,
547 struct dvb_diseqc_master_cmd *d)
548 {
549 struct cx24120_state *state = fe->demodulator_priv;
550 struct cx24120_cmd cmd;
551 int back_count;
552
553 dev_dbg(&state->i2c->dev, "\n");
554
555 cmd.id = CMD_DISEQC_MSG1;
556 cmd.len = 11;
557 cmd.arg[0] = 0x00;
558 cmd.arg[1] = 0x00;
559 cmd.arg[2] = 0x03;
560 cmd.arg[3] = 0x16;
561 cmd.arg[4] = 0x28;
562 cmd.arg[5] = 0x01;
563 cmd.arg[6] = 0x01;
564 cmd.arg[7] = 0x14;
565 cmd.arg[8] = 0x19;
566 cmd.arg[9] = 0x14;
567 cmd.arg[10] = 0x1e;
568
569 if (cx24120_message_send(state, &cmd)) {
570 err("send 1st message(0x%x) failed\n", cmd.id);
571 return -EREMOTEIO;
572 }
573
574 cmd.id = CMD_DISEQC_MSG2;
575 cmd.len = d->msg_len + 6;
576 cmd.arg[0] = 0x00;
577 cmd.arg[1] = 0x01;
578 cmd.arg[2] = 0x02;
579 cmd.arg[3] = 0x00;
580 cmd.arg[4] = 0x00;
581 cmd.arg[5] = d->msg_len;
582
583 memcpy(&cmd.arg[6], &d->msg, d->msg_len);
584
585 if (cx24120_message_send(state, &cmd)) {
586 err("send 2nd message(0x%x) failed\n", cmd.id);
587 return -EREMOTEIO;
588 }
589
590 back_count = 500;
591 do {
592 if (!(cx24120_readreg(state, 0x93) & 0x01)) {
593 dev_dbg(&state->i2c->dev, "diseqc sequence sent\n");
594 return 0;
595 }
596 msleep(20);
597 back_count -= 20;
598 } while (back_count);
599
600 err("Too long waiting for diseqc.\n");
601 return -ETIMEDOUT;
602 }
603
604 static void cx24120_get_stats(struct cx24120_state *state)
605 {
606 struct dvb_frontend *fe = &state->frontend;
607 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
608 struct cx24120_cmd cmd;
609 int ret, cnr, msecs;
610 u16 sig, ucb;
611 u32 ber;
612
613 dev_dbg(&state->i2c->dev, "\n");
614
615 /* signal strength */
616 if (state->fe_status & FE_HAS_SIGNAL) {
617 cmd.id = CMD_READ_SNR;
618 cmd.len = 1;
619 cmd.arg[0] = 0x00;
620
621 ret = cx24120_message_send(state, &cmd);
622 if (ret != 0) {
623 err("error reading signal strength\n");
624 return;
625 }
626
627 /* raw */
628 sig = cx24120_readreg(state, CX24120_REG_SIGSTR_H) >> 6;
629 sig = sig << 8;
630 sig |= cx24120_readreg(state, CX24120_REG_SIGSTR_L);
631 dev_dbg(&state->i2c->dev,
632 "signal strength from firmware = 0x%x\n", sig);
633
634 /* cooked */
635 sig = -100 * sig + 94324;
636
637 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
638 c->strength.stat[0].uvalue = sig;
639 } else {
640 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
641 }
642
643 /* CNR */
644 if (state->fe_status & FE_HAS_VITERBI) {
645 cnr = cx24120_readreg(state, CX24120_REG_QUALITY_H) << 8;
646 cnr |= cx24120_readreg(state, CX24120_REG_QUALITY_L);
647 dev_dbg(&state->i2c->dev, "read SNR index = %d\n", cnr);
648
649 /* guessed - seems about right */
650 cnr = cnr * 100;
651
652 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
653 c->cnr.stat[0].svalue = cnr;
654 } else {
655 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
656 }
657
658 /* BER & UCB require lock */
659 if (!(state->fe_status & FE_HAS_LOCK)) {
660 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
661 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
662 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
663 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
664 return;
665 }
666
667 /* BER */
668 if (time_after(jiffies, state->ber_jiffies_stats)) {
669 msecs = (state->berw_usecs + 500) / 1000;
670 state->ber_jiffies_stats = jiffies + msecs_to_jiffies(msecs);
671
672 ber = cx24120_readreg(state, CX24120_REG_BER_HH) << 24;
673 ber |= cx24120_readreg(state, CX24120_REG_BER_HL) << 16;
674 ber |= cx24120_readreg(state, CX24120_REG_BER_LH) << 8;
675 ber |= cx24120_readreg(state, CX24120_REG_BER_LL);
676 dev_dbg(&state->i2c->dev, "read BER index = %d\n", ber);
677
678 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
679 c->post_bit_error.stat[0].uvalue += ber;
680
681 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
682 c->post_bit_count.stat[0].uvalue += CX24120_BER_WSIZE;
683 }
684
685 /* UCB */
686 if (time_after(jiffies, state->per_jiffies_stats)) {
687 state->per_jiffies_stats = jiffies + msecs_to_jiffies(1000);
688
689 ucb = cx24120_readreg(state, CX24120_REG_UCB_H) << 8;
690 ucb |= cx24120_readreg(state, CX24120_REG_UCB_L);
691 dev_dbg(&state->i2c->dev, "ucblocks = %d\n", ucb);
692
693 /* handle reset */
694 if (ucb < state->ucb_offset)
695 state->ucb_offset = c->block_error.stat[0].uvalue;
696
697 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
698 c->block_error.stat[0].uvalue = ucb + state->ucb_offset;
699
700 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
701 c->block_count.stat[0].uvalue += state->bitrate / 8 / 208;
702 }
703 }
704
705 static void cx24120_set_clock_ratios(struct dvb_frontend *fe);
706
707 /* Read current tuning status */
708 static int cx24120_read_status(struct dvb_frontend *fe, enum fe_status *status)
709 {
710 struct cx24120_state *state = fe->demodulator_priv;
711 int lock;
712
713 lock = cx24120_readreg(state, CX24120_REG_STATUS);
714
715 dev_dbg(&state->i2c->dev, "status = 0x%02x\n", lock);
716
717 *status = 0;
718
719 if (lock & CX24120_HAS_SIGNAL)
720 *status = FE_HAS_SIGNAL;
721 if (lock & CX24120_HAS_CARRIER)
722 *status |= FE_HAS_CARRIER;
723 if (lock & CX24120_HAS_VITERBI)
724 *status |= FE_HAS_VITERBI | FE_HAS_SYNC;
725 if (lock & CX24120_HAS_LOCK)
726 *status |= FE_HAS_LOCK;
727
728 /*
729 * TODO: is FE_HAS_SYNC in the right place?
730 * Other cx241xx drivers have this slightly
731 * different
732 */
733
734 state->fe_status = *status;
735 cx24120_get_stats(state);
736
737 /* Set the clock once tuned in */
738 if (state->need_clock_set && *status & FE_HAS_LOCK) {
739 /* Set clock ratios */
740 cx24120_set_clock_ratios(fe);
741
742 /* Old driver would do a msleep(200) here */
743
744 /* Renable mpeg output */
745 if (!state->mpeg_enabled)
746 cx24120_msg_mpeg_output_global_config(state, 1);
747
748 state->need_clock_set = 0;
749 }
750
751 return 0;
752 }
753
754 /*
755 * FEC & modulation lookup table
756 * Used for decoding the REG_FECMODE register
757 * once tuned in.
758 */
759 struct cx24120_modfec {
760 enum fe_delivery_system delsys;
761 enum fe_modulation mod;
762 enum fe_code_rate fec;
763 u8 val;
764 };
765
766 static const struct cx24120_modfec modfec_lookup_table[] = {
767 /*delsys mod fec val */
768 { SYS_DVBS, QPSK, FEC_1_2, 0x01 },
769 { SYS_DVBS, QPSK, FEC_2_3, 0x02 },
770 { SYS_DVBS, QPSK, FEC_3_4, 0x03 },
771 { SYS_DVBS, QPSK, FEC_4_5, 0x04 },
772 { SYS_DVBS, QPSK, FEC_5_6, 0x05 },
773 { SYS_DVBS, QPSK, FEC_6_7, 0x06 },
774 { SYS_DVBS, QPSK, FEC_7_8, 0x07 },
775
776 { SYS_DVBS2, QPSK, FEC_1_2, 0x04 },
777 { SYS_DVBS2, QPSK, FEC_3_5, 0x05 },
778 { SYS_DVBS2, QPSK, FEC_2_3, 0x06 },
779 { SYS_DVBS2, QPSK, FEC_3_4, 0x07 },
780 { SYS_DVBS2, QPSK, FEC_4_5, 0x08 },
781 { SYS_DVBS2, QPSK, FEC_5_6, 0x09 },
782 { SYS_DVBS2, QPSK, FEC_8_9, 0x0a },
783 { SYS_DVBS2, QPSK, FEC_9_10, 0x0b },
784
785 { SYS_DVBS2, PSK_8, FEC_3_5, 0x0c },
786 { SYS_DVBS2, PSK_8, FEC_2_3, 0x0d },
787 { SYS_DVBS2, PSK_8, FEC_3_4, 0x0e },
788 { SYS_DVBS2, PSK_8, FEC_5_6, 0x0f },
789 { SYS_DVBS2, PSK_8, FEC_8_9, 0x10 },
790 { SYS_DVBS2, PSK_8, FEC_9_10, 0x11 },
791 };
792
793 /* Retrieve current fec, modulation & pilot values */
794 static int cx24120_get_fec(struct dvb_frontend *fe)
795 {
796 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
797 struct cx24120_state *state = fe->demodulator_priv;
798 int idx;
799 int ret;
800 int fec;
801
802 ret = cx24120_readreg(state, CX24120_REG_FECMODE);
803 fec = ret & 0x3f; /* Lower 6 bits */
804
805 dev_dbg(&state->i2c->dev, "raw fec = %d\n", fec);
806
807 for (idx = 0; idx < ARRAY_SIZE(modfec_lookup_table); idx++) {
808 if (modfec_lookup_table[idx].delsys != state->dcur.delsys)
809 continue;
810 if (modfec_lookup_table[idx].val != fec)
811 continue;
812
813 break; /* found */
814 }
815
816 if (idx >= ARRAY_SIZE(modfec_lookup_table)) {
817 dev_dbg(&state->i2c->dev, "couldn't find fec!\n");
818 return -EINVAL;
819 }
820
821 /* save values back to cache */
822 c->modulation = modfec_lookup_table[idx].mod;
823 c->fec_inner = modfec_lookup_table[idx].fec;
824 c->pilot = (ret & 0x80) ? PILOT_ON : PILOT_OFF;
825
826 dev_dbg(&state->i2c->dev, "mod(%d), fec(%d), pilot(%d)\n",
827 c->modulation, c->fec_inner, c->pilot);
828
829 return 0;
830 }
831
832 /* Calculate ber window time */
833 static void cx24120_calculate_ber_window(struct cx24120_state *state, u32 rate)
834 {
835 struct dvb_frontend *fe = &state->frontend;
836 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
837 u64 tmp;
838
839 /*
840 * Calculate bitrate from rate in the clock ratios table.
841 * This isn't *exactly* right but close enough.
842 */
843 tmp = (u64)c->symbol_rate * rate;
844 do_div(tmp, 256);
845 state->bitrate = tmp;
846
847 /* usecs per ber window */
848 tmp = 1000000ULL * CX24120_BER_WSIZE;
849 do_div(tmp, state->bitrate);
850 state->berw_usecs = tmp;
851
852 dev_dbg(&state->i2c->dev, "bitrate: %u, berw_usecs: %u\n",
853 state->bitrate, state->berw_usecs);
854 }
855
856 /*
857 * Clock ratios lookup table
858 *
859 * Values obtained from much larger table in old driver
860 * which had numerous entries which would never match.
861 *
862 * There's probably some way of calculating these but I
863 * can't determine the pattern
864 */
865 struct cx24120_clock_ratios_table {
866 enum fe_delivery_system delsys;
867 enum fe_pilot pilot;
868 enum fe_modulation mod;
869 enum fe_code_rate fec;
870 u32 m_rat;
871 u32 n_rat;
872 u32 rate;
873 };
874
875 static const struct cx24120_clock_ratios_table clock_ratios_table[] = {
876 /*delsys pilot mod fec m_rat n_rat rate */
877 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_1_2, 273088, 254505, 274 },
878 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_3_5, 17272, 13395, 330 },
879 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_2_3, 24344, 16967, 367 },
880 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_3_4, 410788, 254505, 413 },
881 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_4_5, 438328, 254505, 440 },
882 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_5_6, 30464, 16967, 459 },
883 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_8_9, 487832, 254505, 490 },
884 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_9_10, 493952, 254505, 496 },
885 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_3_5, 328168, 169905, 494 },
886 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_2_3, 24344, 11327, 550 },
887 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_3_4, 410788, 169905, 618 },
888 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_5_6, 30464, 11327, 688 },
889 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_8_9, 487832, 169905, 735 },
890 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_9_10, 493952, 169905, 744 },
891 { SYS_DVBS2, PILOT_ON, QPSK, FEC_1_2, 273088, 260709, 268 },
892 { SYS_DVBS2, PILOT_ON, QPSK, FEC_3_5, 328168, 260709, 322 },
893 { SYS_DVBS2, PILOT_ON, QPSK, FEC_2_3, 121720, 86903, 358 },
894 { SYS_DVBS2, PILOT_ON, QPSK, FEC_3_4, 410788, 260709, 403 },
895 { SYS_DVBS2, PILOT_ON, QPSK, FEC_4_5, 438328, 260709, 430 },
896 { SYS_DVBS2, PILOT_ON, QPSK, FEC_5_6, 152320, 86903, 448 },
897 { SYS_DVBS2, PILOT_ON, QPSK, FEC_8_9, 487832, 260709, 479 },
898 { SYS_DVBS2, PILOT_ON, QPSK, FEC_9_10, 493952, 260709, 485 },
899 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_3_5, 328168, 173853, 483 },
900 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_2_3, 121720, 57951, 537 },
901 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_3_4, 410788, 173853, 604 },
902 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_5_6, 152320, 57951, 672 },
903 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_8_9, 487832, 173853, 718 },
904 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_9_10, 493952, 173853, 727 },
905 { SYS_DVBS, PILOT_OFF, QPSK, FEC_1_2, 152592, 152592, 256 },
906 { SYS_DVBS, PILOT_OFF, QPSK, FEC_2_3, 305184, 228888, 341 },
907 { SYS_DVBS, PILOT_OFF, QPSK, FEC_3_4, 457776, 305184, 384 },
908 { SYS_DVBS, PILOT_OFF, QPSK, FEC_5_6, 762960, 457776, 427 },
909 { SYS_DVBS, PILOT_OFF, QPSK, FEC_7_8, 1068144, 610368, 448 },
910 };
911
912 /* Set clock ratio from lookup table */
913 static void cx24120_set_clock_ratios(struct dvb_frontend *fe)
914 {
915 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
916 struct cx24120_state *state = fe->demodulator_priv;
917 struct cx24120_cmd cmd;
918 int ret, idx;
919
920 /* Find fec, modulation, pilot */
921 ret = cx24120_get_fec(fe);
922 if (ret != 0)
923 return;
924
925 /* Find the clock ratios in the lookup table */
926 for (idx = 0; idx < ARRAY_SIZE(clock_ratios_table); idx++) {
927 if (clock_ratios_table[idx].delsys != state->dcur.delsys)
928 continue;
929 if (clock_ratios_table[idx].mod != c->modulation)
930 continue;
931 if (clock_ratios_table[idx].fec != c->fec_inner)
932 continue;
933 if (clock_ratios_table[idx].pilot != c->pilot)
934 continue;
935
936 break; /* found */
937 }
938
939 if (idx >= ARRAY_SIZE(clock_ratios_table)) {
940 info("Clock ratio not found - data reception in danger\n");
941 return;
942 }
943
944 /* Read current values? */
945 cmd.id = CMD_CLOCK_READ;
946 cmd.len = 1;
947 cmd.arg[0] = 0x00;
948 ret = cx24120_message_sendrcv(state, &cmd, 6);
949 if (ret != 0)
950 return;
951 /* in cmd[0]-[5] - result */
952
953 dev_dbg(&state->i2c->dev, "m=%d, n=%d; idx: %d m=%d, n=%d, rate=%d\n",
954 cmd.arg[2] | (cmd.arg[1] << 8) | (cmd.arg[0] << 16),
955 cmd.arg[5] | (cmd.arg[4] << 8) | (cmd.arg[3] << 16),
956 idx,
957 clock_ratios_table[idx].m_rat,
958 clock_ratios_table[idx].n_rat,
959 clock_ratios_table[idx].rate);
960
961 /* Set the clock */
962 cmd.id = CMD_CLOCK_SET;
963 cmd.len = 10;
964 cmd.arg[0] = 0;
965 cmd.arg[1] = 0x10;
966 cmd.arg[2] = (clock_ratios_table[idx].m_rat >> 16) & 0xff;
967 cmd.arg[3] = (clock_ratios_table[idx].m_rat >> 8) & 0xff;
968 cmd.arg[4] = (clock_ratios_table[idx].m_rat >> 0) & 0xff;
969 cmd.arg[5] = (clock_ratios_table[idx].n_rat >> 16) & 0xff;
970 cmd.arg[6] = (clock_ratios_table[idx].n_rat >> 8) & 0xff;
971 cmd.arg[7] = (clock_ratios_table[idx].n_rat >> 0) & 0xff;
972 cmd.arg[8] = (clock_ratios_table[idx].rate >> 8) & 0xff;
973 cmd.arg[9] = (clock_ratios_table[idx].rate >> 0) & 0xff;
974
975 cx24120_message_send(state, &cmd);
976
977 /* Calculate ber window rates for stat work */
978 cx24120_calculate_ber_window(state, clock_ratios_table[idx].rate);
979 }
980
981 /* Set inversion value */
982 static int cx24120_set_inversion(struct cx24120_state *state,
983 enum fe_spectral_inversion inversion)
984 {
985 dev_dbg(&state->i2c->dev, "(%d)\n", inversion);
986
987 switch (inversion) {
988 case INVERSION_OFF:
989 state->dnxt.inversion_val = 0x00;
990 break;
991 case INVERSION_ON:
992 state->dnxt.inversion_val = 0x04;
993 break;
994 case INVERSION_AUTO:
995 state->dnxt.inversion_val = 0x0c;
996 break;
997 default:
998 return -EINVAL;
999 }
1000
1001 state->dnxt.inversion = inversion;
1002
1003 return 0;
1004 }
1005
1006 /* FEC lookup table for tuning */
1007 struct cx24120_modfec_table {
1008 enum fe_delivery_system delsys;
1009 enum fe_modulation mod;
1010 enum fe_code_rate fec;
1011 u8 val;
1012 };
1013
1014 static const struct cx24120_modfec_table modfec_table[] = {
1015 /*delsys mod fec val */
1016 { SYS_DVBS, QPSK, FEC_1_2, 0x2e },
1017 { SYS_DVBS, QPSK, FEC_2_3, 0x2f },
1018 { SYS_DVBS, QPSK, FEC_3_4, 0x30 },
1019 { SYS_DVBS, QPSK, FEC_5_6, 0x31 },
1020 { SYS_DVBS, QPSK, FEC_6_7, 0x32 },
1021 { SYS_DVBS, QPSK, FEC_7_8, 0x33 },
1022
1023 { SYS_DVBS2, QPSK, FEC_1_2, 0x04 },
1024 { SYS_DVBS2, QPSK, FEC_3_5, 0x05 },
1025 { SYS_DVBS2, QPSK, FEC_2_3, 0x06 },
1026 { SYS_DVBS2, QPSK, FEC_3_4, 0x07 },
1027 { SYS_DVBS2, QPSK, FEC_4_5, 0x08 },
1028 { SYS_DVBS2, QPSK, FEC_5_6, 0x09 },
1029 { SYS_DVBS2, QPSK, FEC_8_9, 0x0a },
1030 { SYS_DVBS2, QPSK, FEC_9_10, 0x0b },
1031
1032 { SYS_DVBS2, PSK_8, FEC_3_5, 0x0c },
1033 { SYS_DVBS2, PSK_8, FEC_2_3, 0x0d },
1034 { SYS_DVBS2, PSK_8, FEC_3_4, 0x0e },
1035 { SYS_DVBS2, PSK_8, FEC_5_6, 0x0f },
1036 { SYS_DVBS2, PSK_8, FEC_8_9, 0x10 },
1037 { SYS_DVBS2, PSK_8, FEC_9_10, 0x11 },
1038 };
1039
1040 /* Set fec_val & fec_mask values from delsys, modulation & fec */
1041 static int cx24120_set_fec(struct cx24120_state *state, enum fe_modulation mod,
1042 enum fe_code_rate fec)
1043 {
1044 int idx;
1045
1046 dev_dbg(&state->i2c->dev, "(0x%02x,0x%02x)\n", mod, fec);
1047
1048 state->dnxt.fec = fec;
1049
1050 /* Lookup fec_val from modfec table */
1051 for (idx = 0; idx < ARRAY_SIZE(modfec_table); idx++) {
1052 if (modfec_table[idx].delsys != state->dnxt.delsys)
1053 continue;
1054 if (modfec_table[idx].mod != mod)
1055 continue;
1056 if (modfec_table[idx].fec != fec)
1057 continue;
1058
1059 /* found */
1060 state->dnxt.fec_mask = 0x00;
1061 state->dnxt.fec_val = modfec_table[idx].val;
1062 return 0;
1063 }
1064
1065 if (state->dnxt.delsys == SYS_DVBS2) {
1066 /* DVBS2 auto is 0x00/0x00 */
1067 state->dnxt.fec_mask = 0x00;
1068 state->dnxt.fec_val = 0x00;
1069 } else {
1070 /* Set DVB-S to auto */
1071 state->dnxt.fec_val = 0x2e;
1072 state->dnxt.fec_mask = 0xac;
1073 }
1074
1075 return 0;
1076 }
1077
1078 /* Set pilot */
1079 static int cx24120_set_pilot(struct cx24120_state *state, enum fe_pilot pilot)
1080 {
1081 dev_dbg(&state->i2c->dev, "(%d)\n", pilot);
1082
1083 /* Pilot only valid in DVBS2 */
1084 if (state->dnxt.delsys != SYS_DVBS2) {
1085 state->dnxt.pilot_val = CX24120_PILOT_OFF;
1086 return 0;
1087 }
1088
1089 switch (pilot) {
1090 case PILOT_OFF:
1091 state->dnxt.pilot_val = CX24120_PILOT_OFF;
1092 break;
1093 case PILOT_ON:
1094 state->dnxt.pilot_val = CX24120_PILOT_ON;
1095 break;
1096 case PILOT_AUTO:
1097 default:
1098 state->dnxt.pilot_val = CX24120_PILOT_AUTO;
1099 }
1100
1101 return 0;
1102 }
1103
1104 /* Set symbol rate */
1105 static int cx24120_set_symbolrate(struct cx24120_state *state, u32 rate)
1106 {
1107 dev_dbg(&state->i2c->dev, "(%d)\n", rate);
1108
1109 state->dnxt.symbol_rate = rate;
1110
1111 /* Check symbol rate */
1112 if (rate > 31000000) {
1113 state->dnxt.clkdiv = (-(rate < 31000001) & 3) + 2;
1114 state->dnxt.ratediv = (-(rate < 31000001) & 6) + 4;
1115 } else {
1116 state->dnxt.clkdiv = 3;
1117 state->dnxt.ratediv = 6;
1118 }
1119
1120 return 0;
1121 }
1122
1123 /* Overwrite the current tuning params, we are about to tune */
1124 static void cx24120_clone_params(struct dvb_frontend *fe)
1125 {
1126 struct cx24120_state *state = fe->demodulator_priv;
1127
1128 state->dcur = state->dnxt;
1129 }
1130
1131 static int cx24120_set_frontend(struct dvb_frontend *fe)
1132 {
1133 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1134 struct cx24120_state *state = fe->demodulator_priv;
1135 struct cx24120_cmd cmd;
1136 int ret;
1137
1138 switch (c->delivery_system) {
1139 case SYS_DVBS2:
1140 dev_dbg(&state->i2c->dev, "DVB-S2\n");
1141 break;
1142 case SYS_DVBS:
1143 dev_dbg(&state->i2c->dev, "DVB-S\n");
1144 break;
1145 default:
1146 dev_dbg(&state->i2c->dev,
1147 "delivery system(%d) not supported\n",
1148 c->delivery_system);
1149 return -EINVAL;
1150 }
1151
1152 state->dnxt.delsys = c->delivery_system;
1153 state->dnxt.modulation = c->modulation;
1154 state->dnxt.frequency = c->frequency;
1155 state->dnxt.pilot = c->pilot;
1156
1157 ret = cx24120_set_inversion(state, c->inversion);
1158 if (ret != 0)
1159 return ret;
1160
1161 ret = cx24120_set_fec(state, c->modulation, c->fec_inner);
1162 if (ret != 0)
1163 return ret;
1164
1165 ret = cx24120_set_pilot(state, c->pilot);
1166 if (ret != 0)
1167 return ret;
1168
1169 ret = cx24120_set_symbolrate(state, c->symbol_rate);
1170 if (ret != 0)
1171 return ret;
1172
1173 /* discard the 'current' tuning parameters and prepare to tune */
1174 cx24120_clone_params(fe);
1175
1176 dev_dbg(&state->i2c->dev,
1177 "delsys = %d\n", state->dcur.delsys);
1178 dev_dbg(&state->i2c->dev,
1179 "modulation = %d\n", state->dcur.modulation);
1180 dev_dbg(&state->i2c->dev,
1181 "frequency = %d\n", state->dcur.frequency);
1182 dev_dbg(&state->i2c->dev,
1183 "pilot = %d (val = 0x%02x)\n",
1184 state->dcur.pilot, state->dcur.pilot_val);
1185 dev_dbg(&state->i2c->dev,
1186 "symbol_rate = %d (clkdiv/ratediv = 0x%02x/0x%02x)\n",
1187 state->dcur.symbol_rate,
1188 state->dcur.clkdiv, state->dcur.ratediv);
1189 dev_dbg(&state->i2c->dev,
1190 "FEC = %d (mask/val = 0x%02x/0x%02x)\n",
1191 state->dcur.fec, state->dcur.fec_mask, state->dcur.fec_val);
1192 dev_dbg(&state->i2c->dev,
1193 "Inversion = %d (val = 0x%02x)\n",
1194 state->dcur.inversion, state->dcur.inversion_val);
1195
1196 /* Flag that clock needs to be set after tune */
1197 state->need_clock_set = 1;
1198
1199 /* Tune in */
1200 cmd.id = CMD_TUNEREQUEST;
1201 cmd.len = 15;
1202 cmd.arg[0] = 0;
1203 cmd.arg[1] = (state->dcur.frequency & 0xff0000) >> 16;
1204 cmd.arg[2] = (state->dcur.frequency & 0x00ff00) >> 8;
1205 cmd.arg[3] = (state->dcur.frequency & 0x0000ff);
1206 cmd.arg[4] = ((state->dcur.symbol_rate / 1000) & 0xff00) >> 8;
1207 cmd.arg[5] = ((state->dcur.symbol_rate / 1000) & 0x00ff);
1208 cmd.arg[6] = state->dcur.inversion;
1209 cmd.arg[7] = state->dcur.fec_val | state->dcur.pilot_val;
1210 cmd.arg[8] = CX24120_SEARCH_RANGE_KHZ >> 8;
1211 cmd.arg[9] = CX24120_SEARCH_RANGE_KHZ & 0xff;
1212 cmd.arg[10] = 0; /* maybe rolloff? */
1213 cmd.arg[11] = state->dcur.fec_mask;
1214 cmd.arg[12] = state->dcur.ratediv;
1215 cmd.arg[13] = state->dcur.clkdiv;
1216 cmd.arg[14] = 0;
1217
1218 /* Send tune command */
1219 ret = cx24120_message_send(state, &cmd);
1220 if (ret != 0)
1221 return ret;
1222
1223 /* Write symbol rate values */
1224 ret = cx24120_writereg(state, CX24120_REG_CLKDIV, state->dcur.clkdiv);
1225 ret = cx24120_readreg(state, CX24120_REG_RATEDIV);
1226 ret &= 0xfffffff0;
1227 ret |= state->dcur.ratediv;
1228 ret = cx24120_writereg(state, CX24120_REG_RATEDIV, ret);
1229
1230 return 0;
1231 }
1232
1233 /* Set vco from config */
1234 static int cx24120_set_vco(struct cx24120_state *state)
1235 {
1236 struct cx24120_cmd cmd;
1237 u32 nxtal_khz, vco;
1238 u64 inv_vco;
1239 u32 xtal_khz = state->config->xtal_khz;
1240
1241 nxtal_khz = xtal_khz * 4;
1242 vco = nxtal_khz * 10;
1243 inv_vco = DIV_ROUND_CLOSEST_ULL(0x400000000ULL, vco);
1244
1245 dev_dbg(&state->i2c->dev, "xtal=%d, vco=%d, inv_vco=%lld\n",
1246 xtal_khz, vco, inv_vco);
1247
1248 cmd.id = CMD_VCO_SET;
1249 cmd.len = 12;
1250 cmd.arg[0] = (vco >> 16) & 0xff;
1251 cmd.arg[1] = (vco >> 8) & 0xff;
1252 cmd.arg[2] = vco & 0xff;
1253 cmd.arg[3] = (inv_vco >> 8) & 0xff;
1254 cmd.arg[4] = (inv_vco) & 0xff;
1255 cmd.arg[5] = 0x03;
1256 cmd.arg[6] = (nxtal_khz >> 8) & 0xff;
1257 cmd.arg[7] = nxtal_khz & 0xff;
1258 cmd.arg[8] = 0x06;
1259 cmd.arg[9] = 0x03;
1260 cmd.arg[10] = (xtal_khz >> 16) & 0xff;
1261 cmd.arg[11] = xtal_khz & 0xff;
1262
1263 return cx24120_message_send(state, &cmd);
1264 }
1265
1266 static int cx24120_init(struct dvb_frontend *fe)
1267 {
1268 const struct firmware *fw;
1269 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1270 struct cx24120_state *state = fe->demodulator_priv;
1271 struct cx24120_cmd cmd;
1272 u8 reg;
1273 int ret, i;
1274 unsigned char vers[4];
1275
1276 if (state->cold_init)
1277 return 0;
1278
1279 /* ???? */
1280 cx24120_writereg(state, 0xea, 0x00);
1281 cx24120_test_rom(state);
1282 reg = cx24120_readreg(state, 0xfb) & 0xfe;
1283 cx24120_writereg(state, 0xfb, reg);
1284 reg = cx24120_readreg(state, 0xfc) & 0xfe;
1285 cx24120_writereg(state, 0xfc, reg);
1286 cx24120_writereg(state, 0xc3, 0x04);
1287 cx24120_writereg(state, 0xc4, 0x04);
1288 cx24120_writereg(state, 0xce, 0x00);
1289 cx24120_writereg(state, 0xcf, 0x00);
1290 reg = cx24120_readreg(state, 0xea) & 0xfe;
1291 cx24120_writereg(state, 0xea, reg);
1292 cx24120_writereg(state, 0xeb, 0x0c);
1293 cx24120_writereg(state, 0xec, 0x06);
1294 cx24120_writereg(state, 0xed, 0x05);
1295 cx24120_writereg(state, 0xee, 0x03);
1296 cx24120_writereg(state, 0xef, 0x05);
1297 cx24120_writereg(state, 0xf3, 0x03);
1298 cx24120_writereg(state, 0xf4, 0x44);
1299
1300 for (i = 0; i < 3; i++) {
1301 cx24120_writereg(state, 0xf0 + i, 0x04);
1302 cx24120_writereg(state, 0xe6 + i, 0x02);
1303 }
1304
1305 cx24120_writereg(state, 0xea, (reg | 0x01));
1306 for (i = 0; i < 6; i += 2) {
1307 cx24120_writereg(state, 0xc5 + i, 0x00);
1308 cx24120_writereg(state, 0xc6 + i, 0x00);
1309 }
1310
1311 cx24120_writereg(state, 0xe4, 0x03);
1312 cx24120_writereg(state, 0xeb, 0x0a);
1313
1314 dev_dbg(&state->i2c->dev, "requesting firmware (%s) to download...\n",
1315 CX24120_FIRMWARE);
1316
1317 ret = state->config->request_firmware(fe, &fw, CX24120_FIRMWARE);
1318 if (ret) {
1319 err("Could not load firmware (%s): %d\n", CX24120_FIRMWARE,
1320 ret);
1321 return ret;
1322 }
1323
1324 dev_dbg(&state->i2c->dev,
1325 "Firmware found, size %d bytes (%02x %02x .. %02x %02x)\n",
1326 (int)fw->size, /* firmware_size in bytes */
1327 fw->data[0], /* fw 1st byte */
1328 fw->data[1], /* fw 2d byte */
1329 fw->data[fw->size - 2], /* fw before last byte */
1330 fw->data[fw->size - 1]); /* fw last byte */
1331
1332 cx24120_test_rom(state);
1333 reg = cx24120_readreg(state, 0xfb) & 0xfe;
1334 cx24120_writereg(state, 0xfb, reg);
1335 cx24120_writereg(state, 0xe0, 0x76);
1336 cx24120_writereg(state, 0xf7, 0x81);
1337 cx24120_writereg(state, 0xf8, 0x00);
1338 cx24120_writereg(state, 0xf9, 0x00);
1339 cx24120_writeregs(state, 0xfa, fw->data, (fw->size - 1), 0x00);
1340 cx24120_writereg(state, 0xf7, 0xc0);
1341 cx24120_writereg(state, 0xe0, 0x00);
1342 reg = (fw->size - 2) & 0x00ff;
1343 cx24120_writereg(state, 0xf8, reg);
1344 reg = ((fw->size - 2) >> 8) & 0x00ff;
1345 cx24120_writereg(state, 0xf9, reg);
1346 cx24120_writereg(state, 0xf7, 0x00);
1347 cx24120_writereg(state, 0xdc, 0x00);
1348 cx24120_writereg(state, 0xdc, 0x07);
1349 msleep(500);
1350
1351 /* Check final byte matches final byte of firmware */
1352 reg = cx24120_readreg(state, 0xe1);
1353 if (reg == fw->data[fw->size - 1]) {
1354 dev_dbg(&state->i2c->dev, "Firmware uploaded successfully\n");
1355 ret = 0;
1356 } else {
1357 err("Firmware upload failed. Last byte returned=0x%x\n", ret);
1358 ret = -EREMOTEIO;
1359 }
1360 cx24120_writereg(state, 0xdc, 0x00);
1361 release_firmware(fw);
1362 if (ret != 0)
1363 return ret;
1364
1365 /* Start tuner */
1366 cmd.id = CMD_START_TUNER;
1367 cmd.len = 3;
1368 cmd.arg[0] = 0x00;
1369 cmd.arg[1] = 0x00;
1370 cmd.arg[2] = 0x00;
1371
1372 if (cx24120_message_send(state, &cmd) != 0) {
1373 err("Error tuner start! :(\n");
1374 return -EREMOTEIO;
1375 }
1376
1377 /* Set VCO */
1378 ret = cx24120_set_vco(state);
1379 if (ret != 0) {
1380 err("Error set VCO! :(\n");
1381 return ret;
1382 }
1383
1384 /* set bandwidth */
1385 cmd.id = CMD_BANDWIDTH;
1386 cmd.len = 12;
1387 cmd.arg[0] = 0x00;
1388 cmd.arg[1] = 0x00;
1389 cmd.arg[2] = 0x00;
1390 cmd.arg[3] = 0x00;
1391 cmd.arg[4] = 0x05;
1392 cmd.arg[5] = 0x02;
1393 cmd.arg[6] = 0x02;
1394 cmd.arg[7] = 0x00;
1395 cmd.arg[8] = 0x05;
1396 cmd.arg[9] = 0x02;
1397 cmd.arg[10] = 0x02;
1398 cmd.arg[11] = 0x00;
1399
1400 if (cx24120_message_send(state, &cmd)) {
1401 err("Error set bandwidth!\n");
1402 return -EREMOTEIO;
1403 }
1404
1405 reg = cx24120_readreg(state, 0xba);
1406 if (reg > 3) {
1407 dev_dbg(&state->i2c->dev, "Reset-readreg 0xba: %x\n", ret);
1408 err("Error initialising tuner!\n");
1409 return -EREMOTEIO;
1410 }
1411
1412 dev_dbg(&state->i2c->dev, "Tuner initialised correctly.\n");
1413
1414 /* Initialise mpeg outputs */
1415 cx24120_writereg(state, 0xeb, 0x0a);
1416 if (cx24120_msg_mpeg_output_global_config(state, 0) ||
1417 cx24120_msg_mpeg_output_config(state, 0) ||
1418 cx24120_msg_mpeg_output_config(state, 1) ||
1419 cx24120_msg_mpeg_output_config(state, 2)) {
1420 err("Error initialising mpeg output. :(\n");
1421 return -EREMOTEIO;
1422 }
1423
1424 /* Set size of BER window */
1425 cmd.id = CMD_BER_CTRL;
1426 cmd.len = 3;
1427 cmd.arg[0] = 0x00;
1428 cmd.arg[1] = CX24120_BER_WINDOW;
1429 cmd.arg[2] = CX24120_BER_WINDOW;
1430 if (cx24120_message_send(state, &cmd)) {
1431 err("Error setting ber window\n");
1432 return -EREMOTEIO;
1433 }
1434
1435 /* Firmware CMD 35: Get firmware version */
1436 cmd.id = CMD_FWVERSION;
1437 cmd.len = 1;
1438 for (i = 0; i < 4; i++) {
1439 cmd.arg[0] = i;
1440 ret = cx24120_message_send(state, &cmd);
1441 if (ret != 0)
1442 return ret;
1443 vers[i] = cx24120_readreg(state, CX24120_REG_MAILBOX);
1444 }
1445 info("FW version %i.%i.%i.%i\n", vers[0], vers[1], vers[2], vers[3]);
1446
1447 /* init stats here in order signal app which stats are supported */
1448 c->strength.len = 1;
1449 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1450 c->cnr.len = 1;
1451 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1452 c->post_bit_error.len = 1;
1453 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1454 c->post_bit_count.len = 1;
1455 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1456 c->block_error.len = 1;
1457 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1458 c->block_count.len = 1;
1459 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1460
1461 state->cold_init = 1;
1462
1463 return 0;
1464 }
1465
1466 static int cx24120_tune(struct dvb_frontend *fe, bool re_tune,
1467 unsigned int mode_flags, unsigned int *delay,
1468 enum fe_status *status)
1469 {
1470 struct cx24120_state *state = fe->demodulator_priv;
1471 int ret;
1472
1473 dev_dbg(&state->i2c->dev, "(%d)\n", re_tune);
1474
1475 /* TODO: Do we need to set delay? */
1476
1477 if (re_tune) {
1478 ret = cx24120_set_frontend(fe);
1479 if (ret)
1480 return ret;
1481 }
1482
1483 return cx24120_read_status(fe, status);
1484 }
1485
1486 static enum dvbfe_algo cx24120_get_algo(struct dvb_frontend *fe)
1487 {
1488 return DVBFE_ALGO_HW;
1489 }
1490
1491 static int cx24120_sleep(struct dvb_frontend *fe)
1492 {
1493 return 0;
1494 }
1495
1496 static int cx24120_get_frontend(struct dvb_frontend *fe,
1497 struct dtv_frontend_properties *c)
1498 {
1499 struct cx24120_state *state = fe->demodulator_priv;
1500 u8 freq1, freq2, freq3;
1501 int status;
1502
1503 dev_dbg(&state->i2c->dev, "\n");
1504
1505 /* don't return empty data if we're not tuned in */
1506 status = cx24120_readreg(state, CX24120_REG_STATUS);
1507 if (!(status & CX24120_HAS_LOCK))
1508 return 0;
1509
1510 /* Get frequency */
1511 freq1 = cx24120_readreg(state, CX24120_REG_FREQ1);
1512 freq2 = cx24120_readreg(state, CX24120_REG_FREQ2);
1513 freq3 = cx24120_readreg(state, CX24120_REG_FREQ3);
1514 c->frequency = (freq3 << 16) | (freq2 << 8) | freq1;
1515 dev_dbg(&state->i2c->dev, "frequency = %d\n", c->frequency);
1516
1517 /* Get modulation, fec, pilot */
1518 cx24120_get_fec(fe);
1519
1520 return 0;
1521 }
1522
1523 static void cx24120_release(struct dvb_frontend *fe)
1524 {
1525 struct cx24120_state *state = fe->demodulator_priv;
1526
1527 dev_dbg(&state->i2c->dev, "Clear state structure\n");
1528 kfree(state);
1529 }
1530
1531 static int cx24120_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1532 {
1533 struct cx24120_state *state = fe->demodulator_priv;
1534 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1535
1536 if (c->block_error.stat[0].scale != FE_SCALE_COUNTER) {
1537 *ucblocks = 0;
1538 return 0;
1539 }
1540
1541 *ucblocks = c->block_error.stat[0].uvalue - state->ucb_offset;
1542
1543 return 0;
1544 }
1545
1546 static const struct dvb_frontend_ops cx24120_ops = {
1547 .delsys = { SYS_DVBS, SYS_DVBS2 },
1548 .info = {
1549 .name = "Conexant CX24120/CX24118",
1550 .frequency_min_hz = 950 * MHz,
1551 .frequency_max_hz = 2150 * MHz,
1552 .frequency_stepsize_hz = 1011 * kHz,
1553 .frequency_tolerance_hz = 5 * MHz,
1554 .symbol_rate_min = 1000000,
1555 .symbol_rate_max = 45000000,
1556 .caps = FE_CAN_INVERSION_AUTO |
1557 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1558 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
1559 FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1560 FE_CAN_2G_MODULATION |
1561 FE_CAN_QPSK | FE_CAN_RECOVER
1562 },
1563 .release = cx24120_release,
1564
1565 .init = cx24120_init,
1566 .sleep = cx24120_sleep,
1567
1568 .tune = cx24120_tune,
1569 .get_frontend_algo = cx24120_get_algo,
1570 .set_frontend = cx24120_set_frontend,
1571
1572 .get_frontend = cx24120_get_frontend,
1573 .read_status = cx24120_read_status,
1574 .read_ber = cx24120_read_ber,
1575 .read_signal_strength = cx24120_read_signal_strength,
1576 .read_snr = cx24120_read_snr,
1577 .read_ucblocks = cx24120_read_ucblocks,
1578
1579 .diseqc_send_master_cmd = cx24120_send_diseqc_msg,
1580
1581 .diseqc_send_burst = cx24120_diseqc_send_burst,
1582 .set_tone = cx24120_set_tone,
1583 .set_voltage = cx24120_set_voltage,
1584 };
1585
1586 MODULE_DESCRIPTION("DVB Frontend module for Conexant CX24120/CX24118 hardware");
1587 MODULE_AUTHOR("Jemma Denson");
1588 MODULE_LICENSE("GPL");
Linux with added FPC-III support