1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Driver for Silicon Labs Si2161 DVB-T and Si2165 DVB-C/-T Demodulator
4 *
5 * Copyright (C) 2013-2017 Matthias Schwarzott <zzam@gentoo.org>
6 *
7 * References:
8 * https://www.silabs.com/Support%20Documents/TechnicalDocs/Si2165-short.pdf
9 */
10
11 #include <linux/delay.h>
12 #include <linux/errno.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/string.h>
17 #include <linux/slab.h>
18 #include <linux/firmware.h>
19 #include <linux/regmap.h>
20
21 #include <media/dvb_frontend.h>
22 #include <linux/int_log.h>
23 #include "si2165_priv.h"
24 #include "si2165.h"
25
26 /*
27 * Hauppauge WinTV-HVR-930C-HD B130 / PCTV QuatroStick 521e 1113xx
28 * uses 16 MHz xtal
29 *
30 * Hauppauge WinTV-HVR-930C-HD B131 / PCTV QuatroStick 522e 1114xx
31 * uses 24 MHz clock provided by tuner
32 */
33
34 struct si2165_state {
35 struct i2c_client *client;
36
37 struct regmap *regmap;
38
39 struct dvb_frontend fe;
40
41 struct si2165_config config;
42
43 u8 chip_revcode;
44 u8 chip_type;
45
46 /* calculated by xtal and div settings */
47 u32 fvco_hz;
48 u32 sys_clk;
49 u32 adc_clk;
50
51 /* DVBv3 stats */
52 u64 ber_prev;
53
54 bool has_dvbc;
55 bool has_dvbt;
56 bool firmware_loaded;
57 };
58
si2165_write(struct si2165_state * state,const u16 reg,const u8 * src,const int count)59 static int si2165_write(struct si2165_state *state, const u16 reg,
60 const u8 *src, const int count)
61 {
62 int ret;
63
64 dev_dbg(&state->client->dev, "i2c write: reg: 0x%04x, data: %*ph\n",
65 reg, count, src);
66
67 ret = regmap_bulk_write(state->regmap, reg, src, count);
68
69 if (ret)
70 dev_err(&state->client->dev, "%s: ret == %d\n", __func__, ret);
71
72 return ret;
73 }
74
si2165_read(struct si2165_state * state,const u16 reg,u8 * val,const int count)75 static int si2165_read(struct si2165_state *state,
76 const u16 reg, u8 *val, const int count)
77 {
78 int ret = regmap_bulk_read(state->regmap, reg, val, count);
79
80 if (ret) {
81 dev_err(&state->client->dev, "%s: error (addr %02x reg %04x error (ret == %i)\n",
82 __func__, state->config.i2c_addr, reg, ret);
83 return ret;
84 }
85
86 dev_dbg(&state->client->dev, "i2c read: reg: 0x%04x, data: %*ph\n",
87 reg, count, val);
88
89 return 0;
90 }
91
si2165_readreg8(struct si2165_state * state,const u16 reg,u8 * val)92 static int si2165_readreg8(struct si2165_state *state,
93 const u16 reg, u8 *val)
94 {
95 unsigned int val_tmp;
96 int ret = regmap_read(state->regmap, reg, &val_tmp);
97 *val = (u8)val_tmp;
98 dev_dbg(&state->client->dev, "reg read: R(0x%04x)=0x%02x\n", reg, *val);
99 return ret;
100 }
101
si2165_readreg16(struct si2165_state * state,const u16 reg,u16 * val)102 static int si2165_readreg16(struct si2165_state *state,
103 const u16 reg, u16 *val)
104 {
105 u8 buf[2];
106
107 int ret = si2165_read(state, reg, buf, 2);
108 *val = buf[0] | buf[1] << 8;
109 dev_dbg(&state->client->dev, "reg read: R(0x%04x)=0x%04x\n", reg, *val);
110 return ret;
111 }
112
si2165_readreg24(struct si2165_state * state,const u16 reg,u32 * val)113 static int si2165_readreg24(struct si2165_state *state,
114 const u16 reg, u32 *val)
115 {
116 u8 buf[3];
117
118 int ret = si2165_read(state, reg, buf, 3);
119 *val = buf[0] | buf[1] << 8 | buf[2] << 16;
120 dev_dbg(&state->client->dev, "reg read: R(0x%04x)=0x%06x\n", reg, *val);
121 return ret;
122 }
123
si2165_writereg8(struct si2165_state * state,const u16 reg,u8 val)124 static int si2165_writereg8(struct si2165_state *state, const u16 reg, u8 val)
125 {
126 return regmap_write(state->regmap, reg, val);
127 }
128
si2165_writereg16(struct si2165_state * state,const u16 reg,u16 val)129 static int si2165_writereg16(struct si2165_state *state, const u16 reg, u16 val)
130 {
131 u8 buf[2] = { val & 0xff, (val >> 8) & 0xff };
132
133 return si2165_write(state, reg, buf, 2);
134 }
135
si2165_writereg24(struct si2165_state * state,const u16 reg,u32 val)136 static int si2165_writereg24(struct si2165_state *state, const u16 reg, u32 val)
137 {
138 u8 buf[3] = { val & 0xff, (val >> 8) & 0xff, (val >> 16) & 0xff };
139
140 return si2165_write(state, reg, buf, 3);
141 }
142
si2165_writereg32(struct si2165_state * state,const u16 reg,u32 val)143 static int si2165_writereg32(struct si2165_state *state, const u16 reg, u32 val)
144 {
145 u8 buf[4] = {
146 val & 0xff,
147 (val >> 8) & 0xff,
148 (val >> 16) & 0xff,
149 (val >> 24) & 0xff
150 };
151 return si2165_write(state, reg, buf, 4);
152 }
153
si2165_writereg_mask8(struct si2165_state * state,const u16 reg,u8 val,u8 mask)154 static int si2165_writereg_mask8(struct si2165_state *state, const u16 reg,
155 u8 val, u8 mask)
156 {
157 if (mask != 0xff) {
158 u8 tmp;
159 int ret = si2165_readreg8(state, reg, &tmp);
160
161 if (ret < 0)
162 return ret;
163
164 val &= mask;
165 tmp &= ~mask;
166 val |= tmp;
167 }
168 return si2165_writereg8(state, reg, val);
169 }
170
171 #define REG16(reg, val) \
172 { (reg), (val) & 0xff }, \
173 { (reg) + 1, (val) >> 8 & 0xff }
174 struct si2165_reg_value_pair {
175 u16 reg;
176 u8 val;
177 };
178
si2165_write_reg_list(struct si2165_state * state,const struct si2165_reg_value_pair * regs,int count)179 static int si2165_write_reg_list(struct si2165_state *state,
180 const struct si2165_reg_value_pair *regs,
181 int count)
182 {
183 int i;
184 int ret;
185
186 for (i = 0; i < count; i++) {
187 ret = si2165_writereg8(state, regs[i].reg, regs[i].val);
188 if (ret < 0)
189 return ret;
190 }
191 return 0;
192 }
193
si2165_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * s)194 static int si2165_get_tune_settings(struct dvb_frontend *fe,
195 struct dvb_frontend_tune_settings *s)
196 {
197 s->min_delay_ms = 1000;
198 return 0;
199 }
200
si2165_init_pll(struct si2165_state * state)201 static int si2165_init_pll(struct si2165_state *state)
202 {
203 u32 ref_freq_hz = state->config.ref_freq_hz;
204 u8 divr = 1; /* 1..7 */
205 u8 divp = 1; /* only 1 or 4 */
206 u8 divn = 56; /* 1..63 */
207 u8 divm = 8;
208 u8 divl = 12;
209 u8 buf[4];
210
211 /*
212 * hardcoded values can be deleted if calculation is verified
213 * or it yields the same values as the windows driver
214 */
215 switch (ref_freq_hz) {
216 case 16000000u:
217 divn = 56;
218 break;
219 case 24000000u:
220 divr = 2;
221 divp = 4;
222 divn = 19;
223 break;
224 default:
225 /* ref_freq / divr must be between 4 and 16 MHz */
226 if (ref_freq_hz > 16000000u)
227 divr = 2;
228
229 /*
230 * now select divn and divp such that
231 * fvco is in 1624..1824 MHz
232 */
233 if (1624000000u * divr > ref_freq_hz * 2u * 63u)
234 divp = 4;
235
236 /* is this already correct regarding rounding? */
237 divn = 1624000000u * divr / (ref_freq_hz * 2u * divp);
238 break;
239 }
240
241 /* adc_clk and sys_clk depend on xtal and pll settings */
242 state->fvco_hz = ref_freq_hz / divr
243 * 2u * divn * divp;
244 state->adc_clk = state->fvco_hz / (divm * 4u);
245 state->sys_clk = state->fvco_hz / (divl * 2u);
246
247 /* write all 4 pll registers 0x00a0..0x00a3 at once */
248 buf[0] = divl;
249 buf[1] = divm;
250 buf[2] = (divn & 0x3f) | ((divp == 1) ? 0x40 : 0x00) | 0x80;
251 buf[3] = divr;
252 return si2165_write(state, REG_PLL_DIVL, buf, 4);
253 }
254
si2165_adjust_pll_divl(struct si2165_state * state,u8 divl)255 static int si2165_adjust_pll_divl(struct si2165_state *state, u8 divl)
256 {
257 state->sys_clk = state->fvco_hz / (divl * 2u);
258 return si2165_writereg8(state, REG_PLL_DIVL, divl);
259 }
260
si2165_get_fe_clk(struct si2165_state * state)261 static u32 si2165_get_fe_clk(struct si2165_state *state)
262 {
263 /* assume Oversampling mode Ovr4 is used */
264 return state->adc_clk;
265 }
266
si2165_wait_init_done(struct si2165_state * state)267 static int si2165_wait_init_done(struct si2165_state *state)
268 {
269 int ret;
270 u8 val = 0;
271 int i;
272
273 for (i = 0; i < 3; ++i) {
274 ret = si2165_readreg8(state, REG_INIT_DONE, &val);
275 if (ret < 0)
276 return ret;
277 if (val == 0x01)
278 return 0;
279 usleep_range(1000, 50000);
280 }
281 dev_err(&state->client->dev, "init_done was not set\n");
282 return -EINVAL;
283 }
284
si2165_upload_firmware_block(struct si2165_state * state,const u8 * data,u32 len,u32 * poffset,u32 block_count)285 static int si2165_upload_firmware_block(struct si2165_state *state,
286 const u8 *data, u32 len, u32 *poffset,
287 u32 block_count)
288 {
289 int ret;
290 u8 buf_ctrl[4] = { 0x00, 0x00, 0x00, 0xc0 };
291 u8 wordcount;
292 u32 cur_block = 0;
293 u32 offset = poffset ? *poffset : 0;
294
295 if (len < 4)
296 return -EINVAL;
297 if (len % 4 != 0)
298 return -EINVAL;
299
300 dev_dbg(&state->client->dev,
301 "fw load: %s: called with len=0x%x offset=0x%x blockcount=0x%x\n",
302 __func__, len, offset, block_count);
303 while (offset + 12 <= len && cur_block < block_count) {
304 dev_dbg(&state->client->dev,
305 "fw load: %s: in while len=0x%x offset=0x%x cur_block=0x%x blockcount=0x%x\n",
306 __func__, len, offset, cur_block, block_count);
307 wordcount = data[offset];
308 if (wordcount < 1 || data[offset + 1] ||
309 data[offset + 2] || data[offset + 3]) {
310 dev_warn(&state->client->dev,
311 "bad fw data[0..3] = %*ph\n",
312 4, data);
313 return -EINVAL;
314 }
315
316 if (offset + 8 + wordcount * 4 > len) {
317 dev_warn(&state->client->dev,
318 "len is too small for block len=%d, wordcount=%d\n",
319 len, wordcount);
320 return -EINVAL;
321 }
322
323 buf_ctrl[0] = wordcount - 1;
324
325 ret = si2165_write(state, REG_DCOM_CONTROL_BYTE, buf_ctrl, 4);
326 if (ret < 0)
327 goto error;
328 ret = si2165_write(state, REG_DCOM_ADDR, data + offset + 4, 4);
329 if (ret < 0)
330 goto error;
331
332 offset += 8;
333
334 while (wordcount > 0) {
335 ret = si2165_write(state, REG_DCOM_DATA,
336 data + offset, 4);
337 if (ret < 0)
338 goto error;
339 wordcount--;
340 offset += 4;
341 }
342 cur_block++;
343 }
344
345 dev_dbg(&state->client->dev,
346 "fw load: %s: after while len=0x%x offset=0x%x cur_block=0x%x blockcount=0x%x\n",
347 __func__, len, offset, cur_block, block_count);
348
349 if (poffset)
350 *poffset = offset;
351
352 dev_dbg(&state->client->dev,
353 "fw load: %s: returned offset=0x%x\n",
354 __func__, offset);
355
356 return 0;
357 error:
358 return ret;
359 }
360
si2165_upload_firmware(struct si2165_state * state)361 static int si2165_upload_firmware(struct si2165_state *state)
362 {
363 /* int ret; */
364 u8 val[3];
365 u16 val16;
366 int ret;
367
368 const struct firmware *fw = NULL;
369 u8 *fw_file;
370 const u8 *data;
371 u32 len;
372 u32 offset;
373 u8 patch_version;
374 u8 block_count;
375 u16 crc_expected;
376
377 switch (state->chip_revcode) {
378 case 0x03: /* revision D */
379 fw_file = SI2165_FIRMWARE_REV_D;
380 break;
381 default:
382 dev_info(&state->client->dev, "no firmware file for revision=%d\n",
383 state->chip_revcode);
384 return 0;
385 }
386
387 /* request the firmware, this will block and timeout */
388 ret = request_firmware(&fw, fw_file, &state->client->dev);
389 if (ret) {
390 dev_warn(&state->client->dev, "firmware file '%s' not found\n",
391 fw_file);
392 goto error;
393 }
394
395 data = fw->data;
396 len = fw->size;
397
398 dev_info(&state->client->dev, "downloading firmware from file '%s' size=%d\n",
399 fw_file, len);
400
401 if (len % 4 != 0) {
402 dev_warn(&state->client->dev, "firmware size is not multiple of 4\n");
403 ret = -EINVAL;
404 goto error;
405 }
406
407 /* check header (8 bytes) */
408 if (len < 8) {
409 dev_warn(&state->client->dev, "firmware header is missing\n");
410 ret = -EINVAL;
411 goto error;
412 }
413
414 if (data[0] != 1 || data[1] != 0) {
415 dev_warn(&state->client->dev, "firmware file version is wrong\n");
416 ret = -EINVAL;
417 goto error;
418 }
419
420 patch_version = data[2];
421 block_count = data[4];
422 crc_expected = data[7] << 8 | data[6];
423
424 /* start uploading fw */
425 /* boot/wdog status */
426 ret = si2165_writereg8(state, REG_WDOG_AND_BOOT, 0x00);
427 if (ret < 0)
428 goto error;
429 /* reset */
430 ret = si2165_writereg8(state, REG_RST_ALL, 0x00);
431 if (ret < 0)
432 goto error;
433 /* boot/wdog status */
434 ret = si2165_readreg8(state, REG_WDOG_AND_BOOT, val);
435 if (ret < 0)
436 goto error;
437
438 /* enable reset on error */
439 ret = si2165_readreg8(state, REG_EN_RST_ERROR, val);
440 if (ret < 0)
441 goto error;
442 ret = si2165_readreg8(state, REG_EN_RST_ERROR, val);
443 if (ret < 0)
444 goto error;
445 ret = si2165_writereg8(state, REG_EN_RST_ERROR, 0x02);
446 if (ret < 0)
447 goto error;
448
449 /* start right after the header */
450 offset = 8;
451
452 dev_info(&state->client->dev, "%s: extracted patch_version=0x%02x, block_count=0x%02x, crc_expected=0x%04x\n",
453 __func__, patch_version, block_count, crc_expected);
454
455 ret = si2165_upload_firmware_block(state, data, len, &offset, 1);
456 if (ret < 0)
457 goto error;
458
459 ret = si2165_writereg8(state, REG_PATCH_VERSION, patch_version);
460 if (ret < 0)
461 goto error;
462
463 /* reset crc */
464 ret = si2165_writereg8(state, REG_RST_CRC, 0x01);
465 if (ret)
466 goto error;
467
468 ret = si2165_upload_firmware_block(state, data, len,
469 &offset, block_count);
470 if (ret < 0) {
471 dev_err(&state->client->dev,
472 "firmware could not be uploaded\n");
473 goto error;
474 }
475
476 /* read crc */
477 ret = si2165_readreg16(state, REG_CRC, &val16);
478 if (ret)
479 goto error;
480
481 if (val16 != crc_expected) {
482 dev_err(&state->client->dev,
483 "firmware crc mismatch %04x != %04x\n",
484 val16, crc_expected);
485 ret = -EINVAL;
486 goto error;
487 }
488
489 ret = si2165_upload_firmware_block(state, data, len, &offset, 5);
490 if (ret)
491 goto error;
492
493 if (len != offset) {
494 dev_err(&state->client->dev,
495 "firmware len mismatch %04x != %04x\n",
496 len, offset);
497 ret = -EINVAL;
498 goto error;
499 }
500
501 /* reset watchdog error register */
502 ret = si2165_writereg_mask8(state, REG_WDOG_AND_BOOT, 0x02, 0x02);
503 if (ret < 0)
504 goto error;
505
506 /* enable reset on error */
507 ret = si2165_writereg_mask8(state, REG_EN_RST_ERROR, 0x01, 0x01);
508 if (ret < 0)
509 goto error;
510
511 dev_info(&state->client->dev, "fw load finished\n");
512
513 ret = 0;
514 state->firmware_loaded = true;
515 error:
516 if (fw) {
517 release_firmware(fw);
518 fw = NULL;
519 }
520
521 return ret;
522 }
523
si2165_init(struct dvb_frontend * fe)524 static int si2165_init(struct dvb_frontend *fe)
525 {
526 int ret = 0;
527 struct si2165_state *state = fe->demodulator_priv;
528 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
529 u8 val;
530 u8 patch_version = 0x00;
531
532 dev_dbg(&state->client->dev, "%s: called\n", __func__);
533
534 /* powerup */
535 ret = si2165_writereg8(state, REG_CHIP_MODE, state->config.chip_mode);
536 if (ret < 0)
537 goto error;
538 /* dsp_clock_enable */
539 ret = si2165_writereg8(state, REG_DSP_CLOCK, 0x01);
540 if (ret < 0)
541 goto error;
542 /* verify chip_mode */
543 ret = si2165_readreg8(state, REG_CHIP_MODE, &val);
544 if (ret < 0)
545 goto error;
546 if (val != state->config.chip_mode) {
547 dev_err(&state->client->dev, "could not set chip_mode\n");
548 return -EINVAL;
549 }
550
551 /* agc */
552 ret = si2165_writereg8(state, REG_AGC_IF_TRI, 0x00);
553 if (ret < 0)
554 goto error;
555 ret = si2165_writereg8(state, REG_AGC_IF_SLR, 0x01);
556 if (ret < 0)
557 goto error;
558 ret = si2165_writereg8(state, REG_AGC2_OUTPUT, 0x00);
559 if (ret < 0)
560 goto error;
561 ret = si2165_writereg8(state, REG_AGC2_CLKDIV, 0x07);
562 if (ret < 0)
563 goto error;
564 /* rssi pad */
565 ret = si2165_writereg8(state, REG_RSSI_PAD_CTRL, 0x00);
566 if (ret < 0)
567 goto error;
568 ret = si2165_writereg8(state, REG_RSSI_ENABLE, 0x00);
569 if (ret < 0)
570 goto error;
571
572 ret = si2165_init_pll(state);
573 if (ret < 0)
574 goto error;
575
576 /* enable chip_init */
577 ret = si2165_writereg8(state, REG_CHIP_INIT, 0x01);
578 if (ret < 0)
579 goto error;
580 /* set start_init */
581 ret = si2165_writereg8(state, REG_START_INIT, 0x01);
582 if (ret < 0)
583 goto error;
584 ret = si2165_wait_init_done(state);
585 if (ret < 0)
586 goto error;
587
588 /* disable chip_init */
589 ret = si2165_writereg8(state, REG_CHIP_INIT, 0x00);
590 if (ret < 0)
591 goto error;
592
593 /* ber_pkt - default 65535 */
594 ret = si2165_writereg16(state, REG_BER_PKT,
595 STATISTICS_PERIOD_PKT_COUNT);
596 if (ret < 0)
597 goto error;
598
599 ret = si2165_readreg8(state, REG_PATCH_VERSION, &patch_version);
600 if (ret < 0)
601 goto error;
602
603 ret = si2165_writereg8(state, REG_AUTO_RESET, 0x00);
604 if (ret < 0)
605 goto error;
606
607 /* dsp_addr_jump */
608 ret = si2165_writereg32(state, REG_ADDR_JUMP, 0xf4000000);
609 if (ret < 0)
610 goto error;
611 /* boot/wdog status */
612 ret = si2165_readreg8(state, REG_WDOG_AND_BOOT, &val);
613 if (ret < 0)
614 goto error;
615
616 if (patch_version == 0x00) {
617 ret = si2165_upload_firmware(state);
618 if (ret < 0)
619 goto error;
620 }
621
622 /* ts output config */
623 ret = si2165_writereg8(state, REG_TS_DATA_MODE, 0x20);
624 if (ret < 0)
625 return ret;
626 ret = si2165_writereg16(state, REG_TS_TRI, 0x00fe);
627 if (ret < 0)
628 return ret;
629 ret = si2165_writereg24(state, REG_TS_SLR, 0x555555);
630 if (ret < 0)
631 return ret;
632 ret = si2165_writereg8(state, REG_TS_CLK_MODE, 0x01);
633 if (ret < 0)
634 return ret;
635 ret = si2165_writereg8(state, REG_TS_PARALLEL_MODE, 0x00);
636 if (ret < 0)
637 return ret;
638
639 c = &state->fe.dtv_property_cache;
640 c->cnr.len = 1;
641 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
642 c->post_bit_error.len = 1;
643 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
644 c->post_bit_count.len = 1;
645 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
646
647 return 0;
648 error:
649 return ret;
650 }
651
si2165_sleep(struct dvb_frontend * fe)652 static int si2165_sleep(struct dvb_frontend *fe)
653 {
654 int ret;
655 struct si2165_state *state = fe->demodulator_priv;
656
657 /* dsp clock disable */
658 ret = si2165_writereg8(state, REG_DSP_CLOCK, 0x00);
659 if (ret < 0)
660 return ret;
661 /* chip mode */
662 ret = si2165_writereg8(state, REG_CHIP_MODE, SI2165_MODE_OFF);
663 if (ret < 0)
664 return ret;
665 return 0;
666 }
667
si2165_read_status(struct dvb_frontend * fe,enum fe_status * status)668 static int si2165_read_status(struct dvb_frontend *fe, enum fe_status *status)
669 {
670 int ret;
671 u8 u8tmp;
672 u32 u32tmp;
673 struct si2165_state *state = fe->demodulator_priv;
674 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
675 u32 delsys = c->delivery_system;
676
677 *status = 0;
678
679 switch (delsys) {
680 case SYS_DVBT:
681 /* check fast signal type */
682 ret = si2165_readreg8(state, REG_CHECK_SIGNAL, &u8tmp);
683 if (ret < 0)
684 return ret;
685 switch (u8tmp & 0x3) {
686 case 0: /* searching */
687 case 1: /* nothing */
688 break;
689 case 2: /* digital signal */
690 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
691 break;
692 }
693 break;
694 case SYS_DVBC_ANNEX_A:
695 /* check packet sync lock */
696 ret = si2165_readreg8(state, REG_PS_LOCK, &u8tmp);
697 if (ret < 0)
698 return ret;
699 if (u8tmp & 0x01) {
700 *status |= FE_HAS_SIGNAL;
701 *status |= FE_HAS_CARRIER;
702 *status |= FE_HAS_VITERBI;
703 *status |= FE_HAS_SYNC;
704 }
705 break;
706 }
707
708 /* check fec_lock */
709 ret = si2165_readreg8(state, REG_FEC_LOCK, &u8tmp);
710 if (ret < 0)
711 return ret;
712 if (u8tmp & 0x01) {
713 *status |= FE_HAS_SIGNAL;
714 *status |= FE_HAS_CARRIER;
715 *status |= FE_HAS_VITERBI;
716 *status |= FE_HAS_SYNC;
717 *status |= FE_HAS_LOCK;
718 }
719
720 /* CNR */
721 if (delsys == SYS_DVBC_ANNEX_A && *status & FE_HAS_VITERBI) {
722 ret = si2165_readreg24(state, REG_C_N, &u32tmp);
723 if (ret < 0)
724 return ret;
725 /*
726 * svalue =
727 * 1000 * c_n/dB =
728 * 1000 * 10 * log10(2^24 / regval) =
729 * 1000 * 10 * (log10(2^24) - log10(regval)) =
730 * 1000 * 10 * (intlog10(2^24) - intlog10(regval)) / 2^24
731 *
732 * intlog10(x) = log10(x) * 2^24
733 * intlog10(2^24) = log10(2^24) * 2^24 = 121210686
734 */
735 u32tmp = (1000 * 10 * (121210686 - (u64)intlog10(u32tmp)))
736 >> 24;
737 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
738 c->cnr.stat[0].svalue = u32tmp;
739 } else
740 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
741
742 /* BER */
743 if (*status & FE_HAS_VITERBI) {
744 if (c->post_bit_error.stat[0].scale == FE_SCALE_NOT_AVAILABLE) {
745 /* start new sampling period to get rid of old data*/
746 ret = si2165_writereg8(state, REG_BER_RST, 0x01);
747 if (ret < 0)
748 return ret;
749
750 /* set scale to enter read code on next call */
751 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
752 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
753 c->post_bit_error.stat[0].uvalue = 0;
754 c->post_bit_count.stat[0].uvalue = 0;
755
756 /*
757 * reset DVBv3 value to deliver a good result
758 * for the first call
759 */
760 state->ber_prev = 0;
761
762 } else {
763 ret = si2165_readreg8(state, REG_BER_AVAIL, &u8tmp);
764 if (ret < 0)
765 return ret;
766
767 if (u8tmp & 1) {
768 u32 biterrcnt;
769
770 ret = si2165_readreg24(state, REG_BER_BIT,
771 &biterrcnt);
772 if (ret < 0)
773 return ret;
774
775 c->post_bit_error.stat[0].uvalue +=
776 biterrcnt;
777 c->post_bit_count.stat[0].uvalue +=
778 STATISTICS_PERIOD_BIT_COUNT;
779
780 /* start new sampling period */
781 ret = si2165_writereg8(state,
782 REG_BER_RST, 0x01);
783 if (ret < 0)
784 return ret;
785
786 dev_dbg(&state->client->dev,
787 "post_bit_error=%u post_bit_count=%u\n",
788 biterrcnt, STATISTICS_PERIOD_BIT_COUNT);
789 }
790 }
791 } else {
792 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
793 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
794 }
795
796 return 0;
797 }
798
si2165_read_snr(struct dvb_frontend * fe,u16 * snr)799 static int si2165_read_snr(struct dvb_frontend *fe, u16 *snr)
800 {
801 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
802
803 if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
804 *snr = div_s64(c->cnr.stat[0].svalue, 100);
805 else
806 *snr = 0;
807 return 0;
808 }
809
si2165_read_ber(struct dvb_frontend * fe,u32 * ber)810 static int si2165_read_ber(struct dvb_frontend *fe, u32 *ber)
811 {
812 struct si2165_state *state = fe->demodulator_priv;
813 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
814
815 if (c->post_bit_error.stat[0].scale != FE_SCALE_COUNTER) {
816 *ber = 0;
817 return 0;
818 }
819
820 *ber = c->post_bit_error.stat[0].uvalue - state->ber_prev;
821 state->ber_prev = c->post_bit_error.stat[0].uvalue;
822
823 return 0;
824 }
825
si2165_set_oversamp(struct si2165_state * state,u32 dvb_rate)826 static int si2165_set_oversamp(struct si2165_state *state, u32 dvb_rate)
827 {
828 u64 oversamp;
829 u32 reg_value;
830
831 if (!dvb_rate)
832 return -EINVAL;
833
834 oversamp = si2165_get_fe_clk(state);
835 oversamp <<= 23;
836 do_div(oversamp, dvb_rate);
837 reg_value = oversamp & 0x3fffffff;
838
839 dev_dbg(&state->client->dev, "Write oversamp=%#x\n", reg_value);
840 return si2165_writereg32(state, REG_OVERSAMP, reg_value);
841 }
842
si2165_set_if_freq_shift(struct si2165_state * state)843 static int si2165_set_if_freq_shift(struct si2165_state *state)
844 {
845 struct dvb_frontend *fe = &state->fe;
846 u64 if_freq_shift;
847 s32 reg_value = 0;
848 u32 fe_clk = si2165_get_fe_clk(state);
849 u32 IF = 0;
850
851 if (!fe->ops.tuner_ops.get_if_frequency) {
852 dev_err(&state->client->dev,
853 "Error: get_if_frequency() not defined at tuner. Can't work without it!\n");
854 return -EINVAL;
855 }
856
857 if (!fe_clk)
858 return -EINVAL;
859
860 fe->ops.tuner_ops.get_if_frequency(fe, &IF);
861 if_freq_shift = IF;
862 if_freq_shift <<= 29;
863
864 do_div(if_freq_shift, fe_clk);
865 reg_value = (s32)if_freq_shift;
866
867 if (state->config.inversion)
868 reg_value = -reg_value;
869
870 reg_value = reg_value & 0x1fffffff;
871
872 /* if_freq_shift, usbdump contained 0x023ee08f; */
873 return si2165_writereg32(state, REG_IF_FREQ_SHIFT, reg_value);
874 }
875
876 static const struct si2165_reg_value_pair dvbt_regs[] = {
877 /* standard = DVB-T */
878 { REG_DVB_STANDARD, 0x01 },
879 /* impulsive_noise_remover */
880 { REG_IMPULSIVE_NOISE_REM, 0x01 },
881 { REG_AUTO_RESET, 0x00 },
882 /* agc2 */
883 { REG_AGC2_MIN, 0x41 },
884 { REG_AGC2_KACQ, 0x0e },
885 { REG_AGC2_KLOC, 0x10 },
886 /* agc */
887 { REG_AGC_UNFREEZE_THR, 0x03 },
888 { REG_AGC_CRESTF_DBX8, 0x78 },
889 /* agc */
890 { REG_AAF_CRESTF_DBX8, 0x78 },
891 { REG_ACI_CRESTF_DBX8, 0x68 },
892 /* freq_sync_range */
893 REG16(REG_FREQ_SYNC_RANGE, 0x0064),
894 /* gp_reg0 */
895 { REG_GP_REG0_MSB, 0x00 }
896 };
897
si2165_set_frontend_dvbt(struct dvb_frontend * fe)898 static int si2165_set_frontend_dvbt(struct dvb_frontend *fe)
899 {
900 int ret;
901 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
902 struct si2165_state *state = fe->demodulator_priv;
903 u32 dvb_rate = 0;
904 u16 bw10k;
905 u32 bw_hz = p->bandwidth_hz;
906
907 dev_dbg(&state->client->dev, "%s: called\n", __func__);
908
909 if (!state->has_dvbt)
910 return -EINVAL;
911
912 /* no bandwidth auto-detection */
913 if (bw_hz == 0)
914 return -EINVAL;
915
916 dvb_rate = bw_hz * 8 / 7;
917 bw10k = bw_hz / 10000;
918
919 ret = si2165_adjust_pll_divl(state, 12);
920 if (ret < 0)
921 return ret;
922
923 /* bandwidth in 10KHz steps */
924 ret = si2165_writereg16(state, REG_T_BANDWIDTH, bw10k);
925 if (ret < 0)
926 return ret;
927 ret = si2165_set_oversamp(state, dvb_rate);
928 if (ret < 0)
929 return ret;
930
931 ret = si2165_write_reg_list(state, dvbt_regs, ARRAY_SIZE(dvbt_regs));
932 if (ret < 0)
933 return ret;
934
935 return 0;
936 }
937
938 static const struct si2165_reg_value_pair dvbc_regs[] = {
939 /* standard = DVB-C */
940 { REG_DVB_STANDARD, 0x05 },
941
942 /* agc2 */
943 { REG_AGC2_MIN, 0x50 },
944 { REG_AGC2_KACQ, 0x0e },
945 { REG_AGC2_KLOC, 0x10 },
946 /* agc */
947 { REG_AGC_UNFREEZE_THR, 0x03 },
948 { REG_AGC_CRESTF_DBX8, 0x68 },
949 /* agc */
950 { REG_AAF_CRESTF_DBX8, 0x68 },
951 { REG_ACI_CRESTF_DBX8, 0x50 },
952
953 { REG_EQ_AUTO_CONTROL, 0x0d },
954
955 { REG_KP_LOCK, 0x05 },
956 { REG_CENTRAL_TAP, 0x09 },
957 REG16(REG_UNKNOWN_350, 0x3e80),
958
959 { REG_AUTO_RESET, 0x01 },
960 REG16(REG_UNKNOWN_24C, 0x0000),
961 REG16(REG_UNKNOWN_27C, 0x0000),
962 { REG_SWEEP_STEP, 0x03 },
963 { REG_AGC_IF_TRI, 0x00 },
964 };
965
si2165_set_frontend_dvbc(struct dvb_frontend * fe)966 static int si2165_set_frontend_dvbc(struct dvb_frontend *fe)
967 {
968 struct si2165_state *state = fe->demodulator_priv;
969 int ret;
970 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
971 const u32 dvb_rate = p->symbol_rate;
972 u8 u8tmp;
973
974 if (!state->has_dvbc)
975 return -EINVAL;
976
977 if (dvb_rate == 0)
978 return -EINVAL;
979
980 ret = si2165_adjust_pll_divl(state, 14);
981 if (ret < 0)
982 return ret;
983
984 /* Oversampling */
985 ret = si2165_set_oversamp(state, dvb_rate);
986 if (ret < 0)
987 return ret;
988
989 switch (p->modulation) {
990 case QPSK:
991 u8tmp = 0x3;
992 break;
993 case QAM_16:
994 u8tmp = 0x7;
995 break;
996 case QAM_32:
997 u8tmp = 0x8;
998 break;
999 case QAM_64:
1000 u8tmp = 0x9;
1001 break;
1002 case QAM_128:
1003 u8tmp = 0xa;
1004 break;
1005 case QAM_256:
1006 default:
1007 u8tmp = 0xb;
1008 break;
1009 }
1010 ret = si2165_writereg8(state, REG_REQ_CONSTELLATION, u8tmp);
1011 if (ret < 0)
1012 return ret;
1013
1014 ret = si2165_writereg32(state, REG_LOCK_TIMEOUT, 0x007a1200);
1015 if (ret < 0)
1016 return ret;
1017
1018 ret = si2165_write_reg_list(state, dvbc_regs, ARRAY_SIZE(dvbc_regs));
1019 if (ret < 0)
1020 return ret;
1021
1022 return 0;
1023 }
1024
1025 static const struct si2165_reg_value_pair adc_rewrite[] = {
1026 { REG_ADC_RI1, 0x46 },
1027 { REG_ADC_RI3, 0x00 },
1028 { REG_ADC_RI5, 0x0a },
1029 { REG_ADC_RI6, 0xff },
1030 { REG_ADC_RI8, 0x70 }
1031 };
1032
si2165_set_frontend(struct dvb_frontend * fe)1033 static int si2165_set_frontend(struct dvb_frontend *fe)
1034 {
1035 struct si2165_state *state = fe->demodulator_priv;
1036 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
1037 u32 delsys = p->delivery_system;
1038 int ret;
1039 u8 val[3];
1040
1041 /* initial setting of if freq shift */
1042 ret = si2165_set_if_freq_shift(state);
1043 if (ret < 0)
1044 return ret;
1045
1046 switch (delsys) {
1047 case SYS_DVBT:
1048 ret = si2165_set_frontend_dvbt(fe);
1049 if (ret < 0)
1050 return ret;
1051 break;
1052 case SYS_DVBC_ANNEX_A:
1053 ret = si2165_set_frontend_dvbc(fe);
1054 if (ret < 0)
1055 return ret;
1056 break;
1057 default:
1058 return -EINVAL;
1059 }
1060
1061 /* dsp_addr_jump */
1062 ret = si2165_writereg32(state, REG_ADDR_JUMP, 0xf4000000);
1063 if (ret < 0)
1064 return ret;
1065
1066 if (fe->ops.tuner_ops.set_params)
1067 fe->ops.tuner_ops.set_params(fe);
1068
1069 /* recalc if_freq_shift if IF might has changed */
1070 ret = si2165_set_if_freq_shift(state);
1071 if (ret < 0)
1072 return ret;
1073
1074 /* boot/wdog status */
1075 ret = si2165_readreg8(state, REG_WDOG_AND_BOOT, val);
1076 if (ret < 0)
1077 return ret;
1078 ret = si2165_writereg8(state, REG_WDOG_AND_BOOT, 0x00);
1079 if (ret < 0)
1080 return ret;
1081
1082 /* reset all */
1083 ret = si2165_writereg8(state, REG_RST_ALL, 0x00);
1084 if (ret < 0)
1085 return ret;
1086 /* gp_reg0 */
1087 ret = si2165_writereg32(state, REG_GP_REG0_LSB, 0x00000000);
1088 if (ret < 0)
1089 return ret;
1090
1091 /* write adc values after each reset*/
1092 ret = si2165_write_reg_list(state, adc_rewrite,
1093 ARRAY_SIZE(adc_rewrite));
1094 if (ret < 0)
1095 return ret;
1096
1097 /* start_synchro */
1098 ret = si2165_writereg8(state, REG_START_SYNCHRO, 0x01);
1099 if (ret < 0)
1100 return ret;
1101 /* boot/wdog status */
1102 ret = si2165_readreg8(state, REG_WDOG_AND_BOOT, val);
1103 if (ret < 0)
1104 return ret;
1105
1106 return 0;
1107 }
1108
1109 static const struct dvb_frontend_ops si2165_ops = {
1110 .info = {
1111 .name = "Silicon Labs ",
1112 /* For DVB-C */
1113 .symbol_rate_min = 1000000,
1114 .symbol_rate_max = 7200000,
1115 /* For DVB-T */
1116 .frequency_stepsize_hz = 166667,
1117 .caps = FE_CAN_FEC_1_2 |
1118 FE_CAN_FEC_2_3 |
1119 FE_CAN_FEC_3_4 |
1120 FE_CAN_FEC_5_6 |
1121 FE_CAN_FEC_7_8 |
1122 FE_CAN_FEC_AUTO |
1123 FE_CAN_QPSK |
1124 FE_CAN_QAM_16 |
1125 FE_CAN_QAM_32 |
1126 FE_CAN_QAM_64 |
1127 FE_CAN_QAM_128 |
1128 FE_CAN_QAM_256 |
1129 FE_CAN_GUARD_INTERVAL_AUTO |
1130 FE_CAN_HIERARCHY_AUTO |
1131 FE_CAN_MUTE_TS |
1132 FE_CAN_TRANSMISSION_MODE_AUTO |
1133 FE_CAN_RECOVER
1134 },
1135
1136 .get_tune_settings = si2165_get_tune_settings,
1137
1138 .init = si2165_init,
1139 .sleep = si2165_sleep,
1140
1141 .set_frontend = si2165_set_frontend,
1142 .read_status = si2165_read_status,
1143 .read_snr = si2165_read_snr,
1144 .read_ber = si2165_read_ber,
1145 };
1146
si2165_probe(struct i2c_client * client)1147 static int si2165_probe(struct i2c_client *client)
1148 {
1149 struct si2165_state *state = NULL;
1150 struct si2165_platform_data *pdata = client->dev.platform_data;
1151 int n;
1152 int ret = 0;
1153 u8 val;
1154 char rev_char;
1155 const char *chip_name;
1156 static const struct regmap_config regmap_config = {
1157 .reg_bits = 16,
1158 .val_bits = 8,
1159 .max_register = 0x08ff,
1160 };
1161
1162 /* allocate memory for the internal state */
1163 state = kzalloc(sizeof(*state), GFP_KERNEL);
1164 if (!state) {
1165 ret = -ENOMEM;
1166 goto error;
1167 }
1168
1169 /* create regmap */
1170 state->regmap = devm_regmap_init_i2c(client, ®map_config);
1171 if (IS_ERR(state->regmap)) {
1172 ret = PTR_ERR(state->regmap);
1173 goto error;
1174 }
1175
1176 /* setup the state */
1177 state->client = client;
1178 state->config.i2c_addr = client->addr;
1179 state->config.chip_mode = pdata->chip_mode;
1180 state->config.ref_freq_hz = pdata->ref_freq_hz;
1181 state->config.inversion = pdata->inversion;
1182
1183 if (state->config.ref_freq_hz < 4000000 ||
1184 state->config.ref_freq_hz > 27000000) {
1185 dev_err(&state->client->dev, "ref_freq of %d Hz not supported by this driver\n",
1186 state->config.ref_freq_hz);
1187 ret = -EINVAL;
1188 goto error;
1189 }
1190
1191 /* create dvb_frontend */
1192 memcpy(&state->fe.ops, &si2165_ops,
1193 sizeof(struct dvb_frontend_ops));
1194 state->fe.ops.release = NULL;
1195 state->fe.demodulator_priv = state;
1196 i2c_set_clientdata(client, state);
1197
1198 /* powerup */
1199 ret = si2165_writereg8(state, REG_CHIP_MODE, state->config.chip_mode);
1200 if (ret < 0)
1201 goto nodev_error;
1202
1203 ret = si2165_readreg8(state, REG_CHIP_MODE, &val);
1204 if (ret < 0)
1205 goto nodev_error;
1206 if (val != state->config.chip_mode)
1207 goto nodev_error;
1208
1209 ret = si2165_readreg8(state, REG_CHIP_REVCODE, &state->chip_revcode);
1210 if (ret < 0)
1211 goto nodev_error;
1212
1213 ret = si2165_readreg8(state, REV_CHIP_TYPE, &state->chip_type);
1214 if (ret < 0)
1215 goto nodev_error;
1216
1217 /* powerdown */
1218 ret = si2165_writereg8(state, REG_CHIP_MODE, SI2165_MODE_OFF);
1219 if (ret < 0)
1220 goto nodev_error;
1221
1222 if (state->chip_revcode < 26)
1223 rev_char = 'A' + state->chip_revcode;
1224 else
1225 rev_char = '?';
1226
1227 switch (state->chip_type) {
1228 case 0x06:
1229 chip_name = "Si2161";
1230 state->has_dvbt = true;
1231 break;
1232 case 0x07:
1233 chip_name = "Si2165";
1234 state->has_dvbt = true;
1235 state->has_dvbc = true;
1236 break;
1237 default:
1238 dev_err(&state->client->dev, "Unsupported Silicon Labs chip (type %d, rev %d)\n",
1239 state->chip_type, state->chip_revcode);
1240 goto nodev_error;
1241 }
1242
1243 dev_info(&state->client->dev,
1244 "Detected Silicon Labs %s-%c (type %d, rev %d)\n",
1245 chip_name, rev_char, state->chip_type,
1246 state->chip_revcode);
1247
1248 strlcat(state->fe.ops.info.name, chip_name,
1249 sizeof(state->fe.ops.info.name));
1250
1251 n = 0;
1252 if (state->has_dvbt) {
1253 state->fe.ops.delsys[n++] = SYS_DVBT;
1254 strlcat(state->fe.ops.info.name, " DVB-T",
1255 sizeof(state->fe.ops.info.name));
1256 }
1257 if (state->has_dvbc) {
1258 state->fe.ops.delsys[n++] = SYS_DVBC_ANNEX_A;
1259 strlcat(state->fe.ops.info.name, " DVB-C",
1260 sizeof(state->fe.ops.info.name));
1261 }
1262
1263 /* return fe pointer */
1264 *pdata->fe = &state->fe;
1265
1266 return 0;
1267
1268 nodev_error:
1269 ret = -ENODEV;
1270 error:
1271 kfree(state);
1272 dev_dbg(&client->dev, "failed=%d\n", ret);
1273 return ret;
1274 }
1275
si2165_remove(struct i2c_client * client)1276 static void si2165_remove(struct i2c_client *client)
1277 {
1278 struct si2165_state *state = i2c_get_clientdata(client);
1279
1280 dev_dbg(&client->dev, "\n");
1281
1282 kfree(state);
1283 }
1284
1285 static const struct i2c_device_id si2165_id_table[] = {
1286 {"si2165", 0},
1287 {}
1288 };
1289 MODULE_DEVICE_TABLE(i2c, si2165_id_table);
1290
1291 static struct i2c_driver si2165_driver = {
1292 .driver = {
1293 .name = "si2165",
1294 },
1295 .probe = si2165_probe,
1296 .remove = si2165_remove,
1297 .id_table = si2165_id_table,
1298 };
1299
1300 module_i2c_driver(si2165_driver);
1301
1302 MODULE_DESCRIPTION("Silicon Labs Si2165 DVB-C/-T Demodulator driver");
1303 MODULE_AUTHOR("Matthias Schwarzott <zzam@gentoo.org>");
1304 MODULE_LICENSE("GPL");
1305 MODULE_FIRMWARE(SI2165_FIRMWARE_REV_D);
1306