1// SPDX-License-Identifier: GPL-2.0
2// Rafael Micro R820T driver
3//
4// Copyright (C) 2013 Mauro Carvalho Chehab
5//
6// This driver was written from scratch, based on an existing driver
7// that it is part of rtl-sdr git tree, released under GPLv2:
8// https://groups.google.com/forum/#!topic/ultra-cheap-sdr/Y3rBEOFtHug
9// https://github.com/n1gp/gr-baz
10//
11// From what I understood from the threads, the original driver was converted
12// to userspace from a Realtek tree. I couldn't find the original tree.
13// However, the original driver look awkward on my eyes. So, I decided to
14// write a new version from it from the scratch, while trying to reproduce
15// everything found there.
16//
17// TODO:
18// After locking, the original driver seems to have some routines to
19// improve reception. This was not implemented here yet.
20//
21// RF Gain set/get is not implemented.
22
23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/videodev2.h>
26#include <linux/mutex.h>
27#include <linux/slab.h>
28#include <linux/bitrev.h>
29
30#include "tuner-i2c.h"
31#include "r820t.h"
32
33/*
34 * FIXME: I think that there are only 32 registers, but better safe than
35 * sorry. After finishing the driver, we may review it.
36 */
37#define REG_SHADOW_START 5
38#define NUM_REGS 27
39#define NUM_IMR 5
40#define IMR_TRIAL 9
41
42#define VER_NUM 49
43
44static int debug;
45module_param(debug, int, 0644);
46MODULE_PARM_DESC(debug, "enable verbose debug messages");
47
48static int no_imr_cal;
49module_param(no_imr_cal, int, 0444);
50MODULE_PARM_DESC(no_imr_cal, "Disable IMR calibration at module init");
51
52
53/*
54 * enums and structures
55 */
56
57enum xtal_cap_value {
58 XTAL_LOW_CAP_30P = 0,
59 XTAL_LOW_CAP_20P,
60 XTAL_LOW_CAP_10P,
61 XTAL_LOW_CAP_0P,
62 XTAL_HIGH_CAP_0P
63};
64
65struct r820t_sect_type {
66 u8 phase_y;
67 u8 gain_x;
68 u16 value;
69};
70
71struct r820t_priv {
72 struct list_head hybrid_tuner_instance_list;
73 const struct r820t_config *cfg;
74 struct tuner_i2c_props i2c_props;
75 struct mutex lock;
76
77 u8 regs[NUM_REGS];
78 u8 buf[NUM_REGS + 1];
79 enum xtal_cap_value xtal_cap_sel;
80 u16 pll; /* kHz */
81 u32 int_freq;
82 u8 fil_cal_code;
83 bool imr_done;
84 bool has_lock;
85 bool init_done;
86 struct r820t_sect_type imr_data[NUM_IMR];
87
88 /* Store current mode */
89 u32 delsys;
90 enum v4l2_tuner_type type;
91 v4l2_std_id std;
92 u32 bw; /* in MHz */
93};
94
95struct r820t_freq_range {
96 u32 freq;
97 u8 open_d;
98 u8 rf_mux_ploy;
99 u8 tf_c;
100 u8 xtal_cap20p;
101 u8 xtal_cap10p;
102 u8 xtal_cap0p;
103 u8 imr_mem; /* Not used, currently */
104};
105
106#define VCO_POWER_REF 0x02
107#define DIP_FREQ 32000000
108
109/*
110 * Static constants
111 */
112
113static LIST_HEAD(hybrid_tuner_instance_list);
114static DEFINE_MUTEX(r820t_list_mutex);
115
116/* Those initial values start from REG_SHADOW_START */
117static const u8 r820t_init_array[NUM_REGS] = {
118 0x83, 0x32, 0x75, /* 05 to 07 */
119 0xc0, 0x40, 0xd6, 0x6c, /* 08 to 0b */
120 0xf5, 0x63, 0x75, 0x68, /* 0c to 0f */
121 0x6c, 0x83, 0x80, 0x00, /* 10 to 13 */
122 0x0f, 0x00, 0xc0, 0x30, /* 14 to 17 */
123 0x48, 0xcc, 0x60, 0x00, /* 18 to 1b */
124 0x54, 0xae, 0x4a, 0xc0 /* 1c to 1f */
125};
126
127/* Tuner frequency ranges */
128static const struct r820t_freq_range freq_ranges[] = {
129 {
130 .freq = 0,
131 .open_d = 0x08, /* low */
132 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
133 .tf_c = 0xdf, /* R27[7:0] band2,band0 */
134 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
135 .xtal_cap10p = 0x01,
136 .xtal_cap0p = 0x00,
137 .imr_mem = 0,
138 }, {
139 .freq = 50, /* Start freq, in MHz */
140 .open_d = 0x08, /* low */
141 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
142 .tf_c = 0xbe, /* R27[7:0] band4,band1 */
143 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
144 .xtal_cap10p = 0x01,
145 .xtal_cap0p = 0x00,
146 .imr_mem = 0,
147 }, {
148 .freq = 55, /* Start freq, in MHz */
149 .open_d = 0x08, /* low */
150 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
151 .tf_c = 0x8b, /* R27[7:0] band7,band4 */
152 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
153 .xtal_cap10p = 0x01,
154 .xtal_cap0p = 0x00,
155 .imr_mem = 0,
156 }, {
157 .freq = 60, /* Start freq, in MHz */
158 .open_d = 0x08, /* low */
159 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
160 .tf_c = 0x7b, /* R27[7:0] band8,band4 */
161 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
162 .xtal_cap10p = 0x01,
163 .xtal_cap0p = 0x00,
164 .imr_mem = 0,
165 }, {
166 .freq = 65, /* Start freq, in MHz */
167 .open_d = 0x08, /* low */
168 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
169 .tf_c = 0x69, /* R27[7:0] band9,band6 */
170 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
171 .xtal_cap10p = 0x01,
172 .xtal_cap0p = 0x00,
173 .imr_mem = 0,
174 }, {
175 .freq = 70, /* Start freq, in MHz */
176 .open_d = 0x08, /* low */
177 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
178 .tf_c = 0x58, /* R27[7:0] band10,band7 */
179 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
180 .xtal_cap10p = 0x01,
181 .xtal_cap0p = 0x00,
182 .imr_mem = 0,
183 }, {
184 .freq = 75, /* Start freq, in MHz */
185 .open_d = 0x00, /* high */
186 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
187 .tf_c = 0x44, /* R27[7:0] band11,band11 */
188 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
189 .xtal_cap10p = 0x01,
190 .xtal_cap0p = 0x00,
191 .imr_mem = 0,
192 }, {
193 .freq = 80, /* Start freq, in MHz */
194 .open_d = 0x00, /* high */
195 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
196 .tf_c = 0x44, /* R27[7:0] band11,band11 */
197 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
198 .xtal_cap10p = 0x01,
199 .xtal_cap0p = 0x00,
200 .imr_mem = 0,
201 }, {
202 .freq = 90, /* Start freq, in MHz */
203 .open_d = 0x00, /* high */
204 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
205 .tf_c = 0x34, /* R27[7:0] band12,band11 */
206 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
207 .xtal_cap10p = 0x01,
208 .xtal_cap0p = 0x00,
209 .imr_mem = 0,
210 }, {
211 .freq = 100, /* Start freq, in MHz */
212 .open_d = 0x00, /* high */
213 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
214 .tf_c = 0x34, /* R27[7:0] band12,band11 */
215 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
216 .xtal_cap10p = 0x01,
217 .xtal_cap0p = 0x00,
218 .imr_mem = 0,
219 }, {
220 .freq = 110, /* Start freq, in MHz */
221 .open_d = 0x00, /* high */
222 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
223 .tf_c = 0x24, /* R27[7:0] band13,band11 */
224 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
225 .xtal_cap10p = 0x01,
226 .xtal_cap0p = 0x00,
227 .imr_mem = 1,
228 }, {
229 .freq = 120, /* Start freq, in MHz */
230 .open_d = 0x00, /* high */
231 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
232 .tf_c = 0x24, /* R27[7:0] band13,band11 */
233 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
234 .xtal_cap10p = 0x01,
235 .xtal_cap0p = 0x00,
236 .imr_mem = 1,
237 }, {
238 .freq = 140, /* Start freq, in MHz */
239 .open_d = 0x00, /* high */
240 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
241 .tf_c = 0x14, /* R27[7:0] band14,band11 */
242 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
243 .xtal_cap10p = 0x01,
244 .xtal_cap0p = 0x00,
245 .imr_mem = 1,
246 }, {
247 .freq = 180, /* Start freq, in MHz */
248 .open_d = 0x00, /* high */
249 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
250 .tf_c = 0x13, /* R27[7:0] band14,band12 */
251 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
252 .xtal_cap10p = 0x00,
253 .xtal_cap0p = 0x00,
254 .imr_mem = 1,
255 }, {
256 .freq = 220, /* Start freq, in MHz */
257 .open_d = 0x00, /* high */
258 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
259 .tf_c = 0x13, /* R27[7:0] band14,band12 */
260 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
261 .xtal_cap10p = 0x00,
262 .xtal_cap0p = 0x00,
263 .imr_mem = 2,
264 }, {
265 .freq = 250, /* Start freq, in MHz */
266 .open_d = 0x00, /* high */
267 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
268 .tf_c = 0x11, /* R27[7:0] highest,highest */
269 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
270 .xtal_cap10p = 0x00,
271 .xtal_cap0p = 0x00,
272 .imr_mem = 2,
273 }, {
274 .freq = 280, /* Start freq, in MHz */
275 .open_d = 0x00, /* high */
276 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
277 .tf_c = 0x00, /* R27[7:0] highest,highest */
278 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
279 .xtal_cap10p = 0x00,
280 .xtal_cap0p = 0x00,
281 .imr_mem = 2,
282 }, {
283 .freq = 310, /* Start freq, in MHz */
284 .open_d = 0x00, /* high */
285 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
286 .tf_c = 0x00, /* R27[7:0] highest,highest */
287 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
288 .xtal_cap10p = 0x00,
289 .xtal_cap0p = 0x00,
290 .imr_mem = 2,
291 }, {
292 .freq = 450, /* Start freq, in MHz */
293 .open_d = 0x00, /* high */
294 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
295 .tf_c = 0x00, /* R27[7:0] highest,highest */
296 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
297 .xtal_cap10p = 0x00,
298 .xtal_cap0p = 0x00,
299 .imr_mem = 3,
300 }, {
301 .freq = 588, /* Start freq, in MHz */
302 .open_d = 0x00, /* high */
303 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
304 .tf_c = 0x00, /* R27[7:0] highest,highest */
305 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
306 .xtal_cap10p = 0x00,
307 .xtal_cap0p = 0x00,
308 .imr_mem = 3,
309 }, {
310 .freq = 650, /* Start freq, in MHz */
311 .open_d = 0x00, /* high */
312 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
313 .tf_c = 0x00, /* R27[7:0] highest,highest */
314 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
315 .xtal_cap10p = 0x00,
316 .xtal_cap0p = 0x00,
317 .imr_mem = 4,
318 }
319};
320
321static int r820t_xtal_capacitor[][2] = {
322 { 0x0b, XTAL_LOW_CAP_30P },
323 { 0x02, XTAL_LOW_CAP_20P },
324 { 0x01, XTAL_LOW_CAP_10P },
325 { 0x00, XTAL_LOW_CAP_0P },
326 { 0x10, XTAL_HIGH_CAP_0P },
327};
328
329/*
330 * I2C read/write code and shadow registers logic
331 */
332static void shadow_store(struct r820t_priv *priv, u8 reg, const u8 *val,
333 int len)
334{
335 int r = reg - REG_SHADOW_START;
336
337 if (r < 0) {
338 len += r;
339 r = 0;
340 }
341 if (len <= 0)
342 return;
343 if (len > NUM_REGS - r)
344 len = NUM_REGS - r;
345
346 tuner_dbg("%s: prev reg=%02x len=%d: %*ph\n",
347 __func__, r + REG_SHADOW_START, len, len, val);
348
349 memcpy(&priv->regs[r], val, len);
350}
351
352static int r820t_write(struct r820t_priv *priv, u8 reg, const u8 *val,
353 int len)
354{
355 int rc, size, pos = 0;
356
357 /* Store the shadow registers */
358 shadow_store(priv, reg, val, len);
359
360 do {
361 if (len > priv->cfg->max_i2c_msg_len - 1)
362 size = priv->cfg->max_i2c_msg_len - 1;
363 else
364 size = len;
365
366 /* Fill I2C buffer */
367 priv->buf[0] = reg;
368 memcpy(&priv->buf[1], &val[pos], size);
369
370 rc = tuner_i2c_xfer_send(&priv->i2c_props, priv->buf, size + 1);
371 if (rc != size + 1) {
372 tuner_info("%s: i2c wr failed=%d reg=%02x len=%d: %*ph\n",
373 __func__, rc, reg, size, size, &priv->buf[1]);
374 if (rc < 0)
375 return rc;
376 return -EREMOTEIO;
377 }
378 tuner_dbg("%s: i2c wr reg=%02x len=%d: %*ph\n",
379 __func__, reg, size, size, &priv->buf[1]);
380
381 reg += size;
382 len -= size;
383 pos += size;
384 } while (len > 0);
385
386 return 0;
387}
388
389static inline int r820t_write_reg(struct r820t_priv *priv, u8 reg, u8 val)
390{
391 u8 tmp = val; /* work around GCC PR81715 with asan-stack=1 */
392
393 return r820t_write(priv, reg, &tmp, 1);
394}
395
396static int r820t_read_cache_reg(struct r820t_priv *priv, int reg)
397{
398 reg -= REG_SHADOW_START;
399
400 if (reg >= 0 && reg < NUM_REGS)
401 return priv->regs[reg];
402 else
403 return -EINVAL;
404}
405
406static inline int r820t_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val,
407 u8 bit_mask)
408{
409 u8 tmp = val;
410 int rc = r820t_read_cache_reg(priv, reg);
411
412 if (rc < 0)
413 return rc;
414
415 tmp = (rc & ~bit_mask) | (tmp & bit_mask);
416
417 return r820t_write(priv, reg, &tmp, 1);
418}
419
420static int r820t_read(struct r820t_priv *priv, u8 reg, u8 *val, int len)
421{
422 int rc, i;
423 u8 *p = &priv->buf[1];
424
425 priv->buf[0] = reg;
426
427 rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, priv->buf, 1, p, len);
428 if (rc != len) {
429 tuner_info("%s: i2c rd failed=%d reg=%02x len=%d: %*ph\n",
430 __func__, rc, reg, len, len, p);
431 if (rc < 0)
432 return rc;
433 return -EREMOTEIO;
434 }
435
436 /* Copy data to the output buffer */
437 for (i = 0; i < len; i++)
438 val[i] = bitrev8(p[i]);
439
440 tuner_dbg("%s: i2c rd reg=%02x len=%d: %*ph\n",
441 __func__, reg, len, len, val);
442
443 return 0;
444}
445
446/*
447 * r820t tuning logic
448 */
449
450static int r820t_set_mux(struct r820t_priv *priv, u32 freq)
451{
452 const struct r820t_freq_range *range;
453 int i, rc;
454 u8 val, reg08, reg09;
455
456 /* Get the proper frequency range */
457 freq = freq / 1000000;
458 for (i = 0; i < ARRAY_SIZE(freq_ranges) - 1; i++) {
459 if (freq < freq_ranges[i + 1].freq)
460 break;
461 }
462 range = &freq_ranges[i];
463
464 tuner_dbg("set r820t range#%d for frequency %d MHz\n", i, freq);
465
466 /* Open Drain */
467 rc = r820t_write_reg_mask(priv, 0x17, range->open_d, 0x08);
468 if (rc < 0)
469 return rc;
470
471 /* RF_MUX,Polymux */
472 rc = r820t_write_reg_mask(priv, 0x1a, range->rf_mux_ploy, 0xc3);
473 if (rc < 0)
474 return rc;
475
476 /* TF BAND */
477 rc = r820t_write_reg(priv, 0x1b, range->tf_c);
478 if (rc < 0)
479 return rc;
480
481 /* XTAL CAP & Drive */
482 switch (priv->xtal_cap_sel) {
483 case XTAL_LOW_CAP_30P:
484 case XTAL_LOW_CAP_20P:
485 val = range->xtal_cap20p | 0x08;
486 break;
487 case XTAL_LOW_CAP_10P:
488 val = range->xtal_cap10p | 0x08;
489 break;
490 case XTAL_HIGH_CAP_0P:
491 val = range->xtal_cap0p | 0x00;
492 break;
493 default:
494 case XTAL_LOW_CAP_0P:
495 val = range->xtal_cap0p | 0x08;
496 break;
497 }
498 rc = r820t_write_reg_mask(priv, 0x10, val, 0x0b);
499 if (rc < 0)
500 return rc;
501
502 if (priv->imr_done) {
503 reg08 = priv->imr_data[range->imr_mem].gain_x;
504 reg09 = priv->imr_data[range->imr_mem].phase_y;
505 } else {
506 reg08 = 0;
507 reg09 = 0;
508 }
509 rc = r820t_write_reg_mask(priv, 0x08, reg08, 0x3f);
510 if (rc < 0)
511 return rc;
512
513 rc = r820t_write_reg_mask(priv, 0x09, reg09, 0x3f);
514
515 return rc;
516}
517
518static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type,
519 u32 freq)
520{
521 u32 vco_freq;
522 int rc, i;
523 unsigned sleep_time = 10000;
524 u32 vco_fra; /* VCO contribution by SDM (kHz) */
525 u32 vco_min = 1770000;
526 u32 vco_max = vco_min * 2;
527 u32 pll_ref;
528 u16 n_sdm = 2;
529 u16 sdm = 0;
530 u8 mix_div = 2;
531 u8 div_buf = 0;
532 u8 div_num = 0;
533 u8 refdiv2 = 0;
534 u8 ni, si, nint, vco_fine_tune, val;
535 u8 data[5];
536
537 /* Frequency in kHz */
538 freq = freq / 1000;
539 pll_ref = priv->cfg->xtal / 1000;
540
541#if 0
542 /* Doesn't exist on rtl-sdk, and on field tests, caused troubles */
543 if ((priv->cfg->rafael_chip == CHIP_R620D) ||
544 (priv->cfg->rafael_chip == CHIP_R828D) ||
545 (priv->cfg->rafael_chip == CHIP_R828)) {
546 /* ref set refdiv2, reffreq = Xtal/2 on ATV application */
547 if (type != V4L2_TUNER_DIGITAL_TV) {
548 pll_ref /= 2;
549 refdiv2 = 0x10;
550 sleep_time = 20000;
551 }
552 } else {
553 if (priv->cfg->xtal > 24000000) {
554 pll_ref /= 2;
555 refdiv2 = 0x10;
556 }
557 }
558#endif
559
560 rc = r820t_write_reg_mask(priv, 0x10, refdiv2, 0x10);
561 if (rc < 0)
562 return rc;
563
564 /* set pll autotune = 128kHz */
565 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
566 if (rc < 0)
567 return rc;
568
569 /* set VCO current = 100 */
570 rc = r820t_write_reg_mask(priv, 0x12, 0x80, 0xe0);
571 if (rc < 0)
572 return rc;
573
574 /* Calculate divider */
575 while (mix_div <= 64) {
576 if (((freq * mix_div) >= vco_min) &&
577 ((freq * mix_div) < vco_max)) {
578 div_buf = mix_div;
579 while (div_buf > 2) {
580 div_buf = div_buf >> 1;
581 div_num++;
582 }
583 break;
584 }
585 mix_div = mix_div << 1;
586 }
587
588 rc = r820t_read(priv, 0x00, data, sizeof(data));
589 if (rc < 0)
590 return rc;
591
592 vco_fine_tune = (data[4] & 0x30) >> 4;
593
594 tuner_dbg("mix_div=%d div_num=%d vco_fine_tune=%d\n",
595 mix_div, div_num, vco_fine_tune);
596
597 /*
598 * XXX: R828D/16MHz seems to have always vco_fine_tune=1.
599 * Due to that, this calculation goes wrong.
600 */
601 if (priv->cfg->rafael_chip != CHIP_R828D) {
602 if (vco_fine_tune > VCO_POWER_REF)
603 div_num = div_num - 1;
604 else if (vco_fine_tune < VCO_POWER_REF)
605 div_num = div_num + 1;
606 }
607
608 rc = r820t_write_reg_mask(priv, 0x10, div_num << 5, 0xe0);
609 if (rc < 0)
610 return rc;
611
612 vco_freq = freq * mix_div;
613 nint = vco_freq / (2 * pll_ref);
614 vco_fra = vco_freq - 2 * pll_ref * nint;
615
616 /* boundary spur prevention */
617 if (vco_fra < pll_ref / 64) {
618 vco_fra = 0;
619 } else if (vco_fra > pll_ref * 127 / 64) {
620 vco_fra = 0;
621 nint++;
622 } else if ((vco_fra > pll_ref * 127 / 128) && (vco_fra < pll_ref)) {
623 vco_fra = pll_ref * 127 / 128;
624 } else if ((vco_fra > pll_ref) && (vco_fra < pll_ref * 129 / 128)) {
625 vco_fra = pll_ref * 129 / 128;
626 }
627
628 ni = (nint - 13) / 4;
629 si = nint - 4 * ni - 13;
630
631 rc = r820t_write_reg(priv, 0x14, ni + (si << 6));
632 if (rc < 0)
633 return rc;
634
635 /* pw_sdm */
636 if (!vco_fra)
637 val = 0x08;
638 else
639 val = 0x00;
640
641 rc = r820t_write_reg_mask(priv, 0x12, val, 0x08);
642 if (rc < 0)
643 return rc;
644
645 /* sdm calculator */
646 while (vco_fra > 1) {
647 if (vco_fra > (2 * pll_ref / n_sdm)) {
648 sdm = sdm + 32768 / (n_sdm / 2);
649 vco_fra = vco_fra - 2 * pll_ref / n_sdm;
650 if (n_sdm >= 0x8000)
651 break;
652 }
653 n_sdm = n_sdm << 1;
654 }
655
656 tuner_dbg("freq %d kHz, pll ref %d%s, sdm=0x%04x\n",
657 freq, pll_ref, refdiv2 ? " / 2" : "", sdm);
658
659 rc = r820t_write_reg(priv, 0x16, sdm >> 8);
660 if (rc < 0)
661 return rc;
662 rc = r820t_write_reg(priv, 0x15, sdm & 0xff);
663 if (rc < 0)
664 return rc;
665
666 for (i = 0; i < 2; i++) {
667 usleep_range(sleep_time, sleep_time + 1000);
668
669 /* Check if PLL has locked */
670 rc = r820t_read(priv, 0x00, data, 3);
671 if (rc < 0)
672 return rc;
673 if (data[2] & 0x40)
674 break;
675
676 if (!i) {
677 /* Didn't lock. Increase VCO current */
678 rc = r820t_write_reg_mask(priv, 0x12, 0x60, 0xe0);
679 if (rc < 0)
680 return rc;
681 }
682 }
683
684 if (!(data[2] & 0x40)) {
685 priv->has_lock = false;
686 return 0;
687 }
688
689 priv->has_lock = true;
690 tuner_dbg("tuner has lock at frequency %d kHz\n", freq);
691
692 /* set pll autotune = 8kHz */
693 rc = r820t_write_reg_mask(priv, 0x1a, 0x08, 0x08);
694
695 return rc;
696}
697
698static int r820t_sysfreq_sel(struct r820t_priv *priv, u32 freq,
699 enum v4l2_tuner_type type,
700 v4l2_std_id std,
701 u32 delsys)
702{
703 int rc;
704 u8 mixer_top, lna_top, cp_cur, div_buf_cur, lna_vth_l, mixer_vth_l;
705 u8 air_cable1_in, cable2_in, pre_dect, lna_discharge, filter_cur;
706
707 tuner_dbg("adjusting tuner parameters for the standard\n");
708
709 switch (delsys) {
710 case SYS_DVBT:
711 if ((freq == 506000000) || (freq == 666000000) ||
712 (freq == 818000000)) {
713 mixer_top = 0x14; /* mixer top:14 , top-1, low-discharge */
714 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
715 cp_cur = 0x28; /* 101, 0.2 */
716 div_buf_cur = 0x20; /* 10, 200u */
717 } else {
718 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
719 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
720 cp_cur = 0x38; /* 111, auto */
721 div_buf_cur = 0x30; /* 11, 150u */
722 }
723 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
724 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
725 air_cable1_in = 0x00;
726 cable2_in = 0x00;
727 pre_dect = 0x40;
728 lna_discharge = 14;
729 filter_cur = 0x40; /* 10, low */
730 break;
731 case SYS_DVBT2:
732 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
733 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
734 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
735 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
736 air_cable1_in = 0x00;
737 cable2_in = 0x00;
738 pre_dect = 0x40;
739 lna_discharge = 14;
740 cp_cur = 0x38; /* 111, auto */
741 div_buf_cur = 0x30; /* 11, 150u */
742 filter_cur = 0x40; /* 10, low */
743 break;
744 case SYS_ISDBT:
745 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
746 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
747 lna_vth_l = 0x75; /* lna vth 1.04 , vtl 0.84 */
748 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
749 air_cable1_in = 0x00;
750 cable2_in = 0x00;
751 pre_dect = 0x40;
752 lna_discharge = 14;
753 cp_cur = 0x38; /* 111, auto */
754 div_buf_cur = 0x30; /* 11, 150u */
755 filter_cur = 0x40; /* 10, low */
756 break;
757 case SYS_DVBC_ANNEX_A:
758 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
759 lna_top = 0xe5;
760 lna_vth_l = 0x62;
761 mixer_vth_l = 0x75;
762 air_cable1_in = 0x60;
763 cable2_in = 0x00;
764 pre_dect = 0x40;
765 lna_discharge = 14;
766 cp_cur = 0x38; /* 111, auto */
767 div_buf_cur = 0x30; /* 11, 150u */
768 filter_cur = 0x40; /* 10, low */
769 break;
770 default: /* DVB-T 8M */
771 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
772 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
773 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
774 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
775 air_cable1_in = 0x00;
776 cable2_in = 0x00;
777 pre_dect = 0x40;
778 lna_discharge = 14;
779 cp_cur = 0x38; /* 111, auto */
780 div_buf_cur = 0x30; /* 11, 150u */
781 filter_cur = 0x40; /* 10, low */
782 break;
783 }
784
785 if (priv->cfg->use_diplexer &&
786 ((priv->cfg->rafael_chip == CHIP_R820T) ||
787 (priv->cfg->rafael_chip == CHIP_R828S) ||
788 (priv->cfg->rafael_chip == CHIP_R820C))) {
789 if (freq > DIP_FREQ)
790 air_cable1_in = 0x00;
791 else
792 air_cable1_in = 0x60;
793 cable2_in = 0x00;
794 }
795
796
797 if (priv->cfg->use_predetect) {
798 rc = r820t_write_reg_mask(priv, 0x06, pre_dect, 0x40);
799 if (rc < 0)
800 return rc;
801 }
802
803 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7);
804 if (rc < 0)
805 return rc;
806 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0xf8);
807 if (rc < 0)
808 return rc;
809 rc = r820t_write_reg(priv, 0x0d, lna_vth_l);
810 if (rc < 0)
811 return rc;
812 rc = r820t_write_reg(priv, 0x0e, mixer_vth_l);
813 if (rc < 0)
814 return rc;
815
816 /* Air-IN only for Astrometa */
817 rc = r820t_write_reg_mask(priv, 0x05, air_cable1_in, 0x60);
818 if (rc < 0)
819 return rc;
820 rc = r820t_write_reg_mask(priv, 0x06, cable2_in, 0x08);
821 if (rc < 0)
822 return rc;
823
824 rc = r820t_write_reg_mask(priv, 0x11, cp_cur, 0x38);
825 if (rc < 0)
826 return rc;
827 rc = r820t_write_reg_mask(priv, 0x17, div_buf_cur, 0x30);
828 if (rc < 0)
829 return rc;
830 rc = r820t_write_reg_mask(priv, 0x0a, filter_cur, 0x60);
831 if (rc < 0)
832 return rc;
833 /*
834 * Original driver initializes regs 0x05 and 0x06 with the
835 * same value again on this point. Probably, it is just an
836 * error there
837 */
838
839 /*
840 * Set LNA
841 */
842
843 tuner_dbg("adjusting LNA parameters\n");
844 if (type != V4L2_TUNER_ANALOG_TV) {
845 /* LNA TOP: lowest */
846 rc = r820t_write_reg_mask(priv, 0x1d, 0, 0x38);
847 if (rc < 0)
848 return rc;
849
850 /* 0: normal mode */
851 rc = r820t_write_reg_mask(priv, 0x1c, 0, 0x04);
852 if (rc < 0)
853 return rc;
854
855 /* 0: PRE_DECT off */
856 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
857 if (rc < 0)
858 return rc;
859
860 /* agc clk 250hz */
861 rc = r820t_write_reg_mask(priv, 0x1a, 0x30, 0x30);
862 if (rc < 0)
863 return rc;
864
865 msleep(250);
866
867 /* write LNA TOP = 3 */
868 rc = r820t_write_reg_mask(priv, 0x1d, 0x18, 0x38);
869 if (rc < 0)
870 return rc;
871
872 /*
873 * write discharge mode
874 * FIXME: IMHO, the mask here is wrong, but it matches
875 * what's there at the original driver
876 */
877 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
878 if (rc < 0)
879 return rc;
880
881 /* LNA discharge current */
882 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
883 if (rc < 0)
884 return rc;
885
886 /* agc clk 60hz */
887 rc = r820t_write_reg_mask(priv, 0x1a, 0x20, 0x30);
888 if (rc < 0)
889 return rc;
890 } else {
891 /* PRE_DECT off */
892 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
893 if (rc < 0)
894 return rc;
895
896 /* write LNA TOP */
897 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0x38);
898 if (rc < 0)
899 return rc;
900
901 /*
902 * write discharge mode
903 * FIXME: IMHO, the mask here is wrong, but it matches
904 * what's there at the original driver
905 */
906 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
907 if (rc < 0)
908 return rc;
909
910 /* LNA discharge current */
911 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
912 if (rc < 0)
913 return rc;
914
915 /* agc clk 1Khz, external det1 cap 1u */
916 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x30);
917 if (rc < 0)
918 return rc;
919
920 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x04);
921 if (rc < 0)
922 return rc;
923 }
924 return 0;
925}
926
927static int r820t_set_tv_standard(struct r820t_priv *priv,
928 unsigned bw,
929 enum v4l2_tuner_type type,
930 v4l2_std_id std, u32 delsys)
931
932{
933 int rc, i;
934 u32 if_khz, filt_cal_lo;
935 u8 data[5], val;
936 u8 filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through;
937 u8 lt_att, flt_ext_widest, polyfil_cur;
938 bool need_calibration;
939
940 tuner_dbg("selecting the delivery system\n");
941
942 if (delsys == SYS_ISDBT) {
943 if_khz = 4063;
944 filt_cal_lo = 59000;
945 filt_gain = 0x10; /* +3db, 6mhz on */
946 img_r = 0x00; /* image negative */
947 filt_q = 0x10; /* r10[4]:low q(1'b1) */
948 hp_cor = 0x6a; /* 1.7m disable, +2cap, 1.25mhz */
949 ext_enable = 0x40; /* r30[6], ext enable; r30[5]:0 ext at lna max */
950 loop_through = 0x00; /* r5[7], lt on */
951 lt_att = 0x00; /* r31[7], lt att enable */
952 flt_ext_widest = 0x80; /* r15[7]: flt_ext_wide on */
953 polyfil_cur = 0x60; /* r25[6:5]:min */
954 } else if (delsys == SYS_DVBC_ANNEX_A) {
955 if_khz = 5070;
956 filt_cal_lo = 73500;
957 filt_gain = 0x10; /* +3db, 6mhz on */
958 img_r = 0x00; /* image negative */
959 filt_q = 0x10; /* r10[4]:low q(1'b1) */
960 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */
961 ext_enable = 0x40; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
962 loop_through = 0x00; /* r5[7], lt on */
963 lt_att = 0x00; /* r31[7], lt att enable */
964 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
965 polyfil_cur = 0x60; /* r25[6:5]:min */
966 } else if (delsys == SYS_DVBC_ANNEX_C) {
967 if_khz = 4063;
968 filt_cal_lo = 55000;
969 filt_gain = 0x10; /* +3db, 6mhz on */
970 img_r = 0x00; /* image negative */
971 filt_q = 0x10; /* r10[4]:low q(1'b1) */
972 hp_cor = 0x6a; /* 1.7m disable, +0cap, 1.0mhz */
973 ext_enable = 0x40; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
974 loop_through = 0x00; /* r5[7], lt on */
975 lt_att = 0x00; /* r31[7], lt att enable */
976 flt_ext_widest = 0x80; /* r15[7]: flt_ext_wide on */
977 polyfil_cur = 0x60; /* r25[6:5]:min */
978 } else {
979 if (bw <= 6) {
980 if_khz = 3570;
981 filt_cal_lo = 56000; /* 52000->56000 */
982 filt_gain = 0x10; /* +3db, 6mhz on */
983 img_r = 0x00; /* image negative */
984 filt_q = 0x10; /* r10[4]:low q(1'b1) */
985 hp_cor = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */
986 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
987 loop_through = 0x00; /* r5[7], lt on */
988 lt_att = 0x00; /* r31[7], lt att enable */
989 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
990 polyfil_cur = 0x60; /* r25[6:5]:min */
991 } else if (bw == 7) {
992#if 0
993 /*
994 * There are two 7 MHz tables defined on the original
995 * driver, but just the second one seems to be visible
996 * by rtl2832. Keep this one here commented, as it
997 * might be needed in the future
998 */
999
1000 if_khz = 4070;
1001 filt_cal_lo = 60000;
1002 filt_gain = 0x10; /* +3db, 6mhz on */
1003 img_r = 0x00; /* image negative */
1004 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1005 hp_cor = 0x2b; /* 1.7m disable, +1cap, 1.0mhz */
1006 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1007 loop_through = 0x00; /* r5[7], lt on */
1008 lt_att = 0x00; /* r31[7], lt att enable */
1009 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1010 polyfil_cur = 0x60; /* r25[6:5]:min */
1011#endif
1012 /* 7 MHz, second table */
1013 if_khz = 4570;
1014 filt_cal_lo = 63000;
1015 filt_gain = 0x10; /* +3db, 6mhz on */
1016 img_r = 0x00; /* image negative */
1017 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1018 hp_cor = 0x2a; /* 1.7m disable, +1cap, 1.25mhz */
1019 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1020 loop_through = 0x00; /* r5[7], lt on */
1021 lt_att = 0x00; /* r31[7], lt att enable */
1022 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1023 polyfil_cur = 0x60; /* r25[6:5]:min */
1024 } else {
1025 if_khz = 4570;
1026 filt_cal_lo = 68500;
1027 filt_gain = 0x10; /* +3db, 6mhz on */
1028 img_r = 0x00; /* image negative */
1029 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1030 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */
1031 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1032 loop_through = 0x00; /* r5[7], lt on */
1033 lt_att = 0x00; /* r31[7], lt att enable */
1034 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1035 polyfil_cur = 0x60; /* r25[6:5]:min */
1036 }
1037 }
1038
1039 /* Initialize the shadow registers */
1040 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1041
1042 /* Init Flag & Xtal_check Result */
1043 if (priv->imr_done)
1044 val = 1 | priv->xtal_cap_sel << 1;
1045 else
1046 val = 0;
1047 rc = r820t_write_reg_mask(priv, 0x0c, val, 0x0f);
1048 if (rc < 0)
1049 return rc;
1050
1051 /* version */
1052 rc = r820t_write_reg_mask(priv, 0x13, VER_NUM, 0x3f);
1053 if (rc < 0)
1054 return rc;
1055
1056 /* for LT Gain test */
1057 if (type != V4L2_TUNER_ANALOG_TV) {
1058 rc = r820t_write_reg_mask(priv, 0x1d, 0x00, 0x38);
1059 if (rc < 0)
1060 return rc;
1061 usleep_range(1000, 2000);
1062 }
1063 priv->int_freq = if_khz * 1000;
1064
1065 /* Check if standard changed. If so, filter calibration is needed */
1066 if (type != priv->type)
1067 need_calibration = true;
1068 else if ((type == V4L2_TUNER_ANALOG_TV) && (std != priv->std))
1069 need_calibration = true;
1070 else if ((type == V4L2_TUNER_DIGITAL_TV) &&
1071 ((delsys != priv->delsys) || bw != priv->bw))
1072 need_calibration = true;
1073 else
1074 need_calibration = false;
1075
1076 if (need_calibration) {
1077 tuner_dbg("calibrating the tuner\n");
1078 for (i = 0; i < 2; i++) {
1079 /* Set filt_cap */
1080 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x60);
1081 if (rc < 0)
1082 return rc;
1083
1084 /* set cali clk =on */
1085 rc = r820t_write_reg_mask(priv, 0x0f, 0x04, 0x04);
1086 if (rc < 0)
1087 return rc;
1088
1089 /* X'tal cap 0pF for PLL */
1090 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x03);
1091 if (rc < 0)
1092 return rc;
1093
1094 rc = r820t_set_pll(priv, type, filt_cal_lo * 1000);
1095 if (rc < 0 || !priv->has_lock)
1096 return rc;
1097
1098 /* Start Trigger */
1099 rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10);
1100 if (rc < 0)
1101 return rc;
1102
1103 usleep_range(1000, 2000);
1104
1105 /* Stop Trigger */
1106 rc = r820t_write_reg_mask(priv, 0x0b, 0x00, 0x10);
1107 if (rc < 0)
1108 return rc;
1109
1110 /* set cali clk =off */
1111 rc = r820t_write_reg_mask(priv, 0x0f, 0x00, 0x04);
1112 if (rc < 0)
1113 return rc;
1114
1115 /* Check if calibration worked */
1116 rc = r820t_read(priv, 0x00, data, sizeof(data));
1117 if (rc < 0)
1118 return rc;
1119
1120 priv->fil_cal_code = data[4] & 0x0f;
1121 if (priv->fil_cal_code && priv->fil_cal_code != 0x0f)
1122 break;
1123 }
1124 /* narrowest */
1125 if (priv->fil_cal_code == 0x0f)
1126 priv->fil_cal_code = 0;
1127 }
1128
1129 rc = r820t_write_reg_mask(priv, 0x0a,
1130 filt_q | priv->fil_cal_code, 0x1f);
1131 if (rc < 0)
1132 return rc;
1133
1134 /* Set BW, Filter_gain, & HP corner */
1135 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0xef);
1136 if (rc < 0)
1137 return rc;
1138
1139
1140 /* Set Img_R */
1141 rc = r820t_write_reg_mask(priv, 0x07, img_r, 0x80);
1142 if (rc < 0)
1143 return rc;
1144
1145 /* Set filt_3dB, V6MHz */
1146 rc = r820t_write_reg_mask(priv, 0x06, filt_gain, 0x30);
1147 if (rc < 0)
1148 return rc;
1149
1150 /* channel filter extension */
1151 rc = r820t_write_reg_mask(priv, 0x1e, ext_enable, 0x60);
1152 if (rc < 0)
1153 return rc;
1154
1155 /* Loop through */
1156 rc = r820t_write_reg_mask(priv, 0x05, loop_through, 0x80);
1157 if (rc < 0)
1158 return rc;
1159
1160 /* Loop through attenuation */
1161 rc = r820t_write_reg_mask(priv, 0x1f, lt_att, 0x80);
1162 if (rc < 0)
1163 return rc;
1164
1165 /* filter extension widest */
1166 rc = r820t_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80);
1167 if (rc < 0)
1168 return rc;
1169
1170 /* RF poly filter current */
1171 rc = r820t_write_reg_mask(priv, 0x19, polyfil_cur, 0x60);
1172 if (rc < 0)
1173 return rc;
1174
1175 /* Store current standard. If it changes, re-calibrate the tuner */
1176 priv->delsys = delsys;
1177 priv->type = type;
1178 priv->std = std;
1179 priv->bw = bw;
1180
1181 return 0;
1182}
1183
1184static int r820t_read_gain(struct r820t_priv *priv)
1185{
1186 u8 data[4];
1187 int rc;
1188
1189 rc = r820t_read(priv, 0x00, data, sizeof(data));
1190 if (rc < 0)
1191 return rc;
1192
1193 return ((data[3] & 0x08) << 1) + ((data[3] & 0xf0) >> 4);
1194}
1195
1196#if 0
1197/* FIXME: This routine requires more testing */
1198
1199/*
1200 * measured with a Racal 6103E GSM test set at 928 MHz with -60 dBm
1201 * input power, for raw results see:
1202 * http://steve-m.de/projects/rtl-sdr/gain_measurement/r820t/
1203 */
1204
1205static const int r820t_lna_gain_steps[] = {
1206 0, 9, 13, 40, 38, 13, 31, 22, 26, 31, 26, 14, 19, 5, 35, 13
1207};
1208
1209static const int r820t_mixer_gain_steps[] = {
1210 0, 5, 10, 10, 19, 9, 10, 25, 17, 10, 8, 16, 13, 6, 3, -8
1211};
1212
1213static int r820t_set_gain_mode(struct r820t_priv *priv,
1214 bool set_manual_gain,
1215 int gain)
1216{
1217 int rc;
1218
1219 if (set_manual_gain) {
1220 int i, total_gain = 0;
1221 uint8_t mix_index = 0, lna_index = 0;
1222 u8 data[4];
1223
1224 /* LNA auto off */
1225 rc = r820t_write_reg_mask(priv, 0x05, 0x10, 0x10);
1226 if (rc < 0)
1227 return rc;
1228
1229 /* Mixer auto off */
1230 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1231 if (rc < 0)
1232 return rc;
1233
1234 rc = r820t_read(priv, 0x00, data, sizeof(data));
1235 if (rc < 0)
1236 return rc;
1237
1238 /* set fixed VGA gain for now (16.3 dB) */
1239 rc = r820t_write_reg_mask(priv, 0x0c, 0x08, 0x9f);
1240 if (rc < 0)
1241 return rc;
1242
1243 for (i = 0; i < 15; i++) {
1244 if (total_gain >= gain)
1245 break;
1246
1247 total_gain += r820t_lna_gain_steps[++lna_index];
1248
1249 if (total_gain >= gain)
1250 break;
1251
1252 total_gain += r820t_mixer_gain_steps[++mix_index];
1253 }
1254
1255 /* set LNA gain */
1256 rc = r820t_write_reg_mask(priv, 0x05, lna_index, 0x0f);
1257 if (rc < 0)
1258 return rc;
1259
1260 /* set Mixer gain */
1261 rc = r820t_write_reg_mask(priv, 0x07, mix_index, 0x0f);
1262 if (rc < 0)
1263 return rc;
1264 } else {
1265 /* LNA */
1266 rc = r820t_write_reg_mask(priv, 0x05, 0, 0x10);
1267 if (rc < 0)
1268 return rc;
1269
1270 /* Mixer */
1271 rc = r820t_write_reg_mask(priv, 0x07, 0x10, 0x10);
1272 if (rc < 0)
1273 return rc;
1274
1275 /* set fixed VGA gain for now (26.5 dB) */
1276 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1277 if (rc < 0)
1278 return rc;
1279 }
1280
1281 return 0;
1282}
1283#endif
1284
1285static int generic_set_freq(struct dvb_frontend *fe,
1286 u32 freq /* in HZ */,
1287 unsigned bw,
1288 enum v4l2_tuner_type type,
1289 v4l2_std_id std, u32 delsys)
1290{
1291 struct r820t_priv *priv = fe->tuner_priv;
1292 int rc;
1293 u32 lo_freq;
1294
1295 tuner_dbg("should set frequency to %d kHz, bw %d MHz\n",
1296 freq / 1000, bw);
1297
1298 rc = r820t_set_tv_standard(priv, bw, type, std, delsys);
1299 if (rc < 0)
1300 goto err;
1301
1302 if ((type == V4L2_TUNER_ANALOG_TV) && (std == V4L2_STD_SECAM_LC))
1303 lo_freq = freq - priv->int_freq;
1304 else
1305 lo_freq = freq + priv->int_freq;
1306
1307 rc = r820t_set_mux(priv, lo_freq);
1308 if (rc < 0)
1309 goto err;
1310
1311 rc = r820t_set_pll(priv, type, lo_freq);
1312 if (rc < 0 || !priv->has_lock)
1313 goto err;
1314
1315 rc = r820t_sysfreq_sel(priv, freq, type, std, delsys);
1316 if (rc < 0)
1317 goto err;
1318
1319 tuner_dbg("%s: PLL locked on frequency %d Hz, gain=%d\n",
1320 __func__, freq, r820t_read_gain(priv));
1321
1322err:
1323
1324 if (rc < 0)
1325 tuner_dbg("%s: failed=%d\n", __func__, rc);
1326 return rc;
1327}
1328
1329/*
1330 * r820t standby logic
1331 */
1332
1333static int r820t_standby(struct r820t_priv *priv)
1334{
1335 int rc;
1336
1337 /* If device was not initialized yet, don't need to standby */
1338 if (!priv->init_done)
1339 return 0;
1340
1341 rc = r820t_write_reg(priv, 0x06, 0xb1);
1342 if (rc < 0)
1343 return rc;
1344 rc = r820t_write_reg(priv, 0x05, 0x03);
1345 if (rc < 0)
1346 return rc;
1347 rc = r820t_write_reg(priv, 0x07, 0x3a);
1348 if (rc < 0)
1349 return rc;
1350 rc = r820t_write_reg(priv, 0x08, 0x40);
1351 if (rc < 0)
1352 return rc;
1353 rc = r820t_write_reg(priv, 0x09, 0xc0);
1354 if (rc < 0)
1355 return rc;
1356 rc = r820t_write_reg(priv, 0x0a, 0x36);
1357 if (rc < 0)
1358 return rc;
1359 rc = r820t_write_reg(priv, 0x0c, 0x35);
1360 if (rc < 0)
1361 return rc;
1362 rc = r820t_write_reg(priv, 0x0f, 0x68);
1363 if (rc < 0)
1364 return rc;
1365 rc = r820t_write_reg(priv, 0x11, 0x03);
1366 if (rc < 0)
1367 return rc;
1368 rc = r820t_write_reg(priv, 0x17, 0xf4);
1369 if (rc < 0)
1370 return rc;
1371 rc = r820t_write_reg(priv, 0x19, 0x0c);
1372
1373 /* Force initial calibration */
1374 priv->type = -1;
1375
1376 return rc;
1377}
1378
1379/*
1380 * r820t device init logic
1381 */
1382
1383static int r820t_xtal_check(struct r820t_priv *priv)
1384{
1385 int rc, i;
1386 u8 data[3], val;
1387
1388 /* Initialize the shadow registers */
1389 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1390
1391 /* cap 30pF & Drive Low */
1392 rc = r820t_write_reg_mask(priv, 0x10, 0x0b, 0x0b);
1393 if (rc < 0)
1394 return rc;
1395
1396 /* set pll autotune = 128kHz */
1397 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
1398 if (rc < 0)
1399 return rc;
1400
1401 /* set manual initial reg = 111111; */
1402 rc = r820t_write_reg_mask(priv, 0x13, 0x7f, 0x7f);
1403 if (rc < 0)
1404 return rc;
1405
1406 /* set auto */
1407 rc = r820t_write_reg_mask(priv, 0x13, 0x00, 0x40);
1408 if (rc < 0)
1409 return rc;
1410
1411 /* Try several xtal capacitor alternatives */
1412 for (i = 0; i < ARRAY_SIZE(r820t_xtal_capacitor); i++) {
1413 rc = r820t_write_reg_mask(priv, 0x10,
1414 r820t_xtal_capacitor[i][0], 0x1b);
1415 if (rc < 0)
1416 return rc;
1417
1418 usleep_range(5000, 6000);
1419
1420 rc = r820t_read(priv, 0x00, data, sizeof(data));
1421 if (rc < 0)
1422 return rc;
1423 if (!(data[2] & 0x40))
1424 continue;
1425
1426 val = data[2] & 0x3f;
1427
1428 if (priv->cfg->xtal == 16000000 && (val > 29 || val < 23))
1429 break;
1430
1431 if (val != 0x3f)
1432 break;
1433 }
1434
1435 if (i == ARRAY_SIZE(r820t_xtal_capacitor))
1436 return -EINVAL;
1437
1438 return r820t_xtal_capacitor[i][1];
1439}
1440
1441static int r820t_imr_prepare(struct r820t_priv *priv)
1442{
1443 int rc;
1444
1445 /* Initialize the shadow registers */
1446 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1447
1448 /* lna off (air-in off) */
1449 rc = r820t_write_reg_mask(priv, 0x05, 0x20, 0x20);
1450 if (rc < 0)
1451 return rc;
1452
1453 /* mixer gain mode = manual */
1454 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1455 if (rc < 0)
1456 return rc;
1457
1458 /* filter corner = lowest */
1459 rc = r820t_write_reg_mask(priv, 0x0a, 0x0f, 0x0f);
1460 if (rc < 0)
1461 return rc;
1462
1463 /* filter bw=+2cap, hp=5M */
1464 rc = r820t_write_reg_mask(priv, 0x0b, 0x60, 0x6f);
1465 if (rc < 0)
1466 return rc;
1467
1468 /* adc=on, vga code mode, gain = 26.5dB */
1469 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1470 if (rc < 0)
1471 return rc;
1472
1473 /* ring clk = on */
1474 rc = r820t_write_reg_mask(priv, 0x0f, 0, 0x08);
1475 if (rc < 0)
1476 return rc;
1477
1478 /* ring power = on */
1479 rc = r820t_write_reg_mask(priv, 0x18, 0x10, 0x10);
1480 if (rc < 0)
1481 return rc;
1482
1483 /* from ring = ring pll in */
1484 rc = r820t_write_reg_mask(priv, 0x1c, 0x02, 0x02);
1485 if (rc < 0)
1486 return rc;
1487
1488 /* sw_pdect = det3 */
1489 rc = r820t_write_reg_mask(priv, 0x1e, 0x80, 0x80);
1490 if (rc < 0)
1491 return rc;
1492
1493 /* Set filt_3dB */
1494 rc = r820t_write_reg_mask(priv, 0x06, 0x20, 0x20);
1495
1496 return rc;
1497}
1498
1499static int r820t_multi_read(struct r820t_priv *priv)
1500{
1501 int rc, i;
1502 u16 sum = 0;
1503 u8 data[2], min = 255, max = 0;
1504
1505 usleep_range(5000, 6000);
1506
1507 for (i = 0; i < 6; i++) {
1508 rc = r820t_read(priv, 0x00, data, sizeof(data));
1509 if (rc < 0)
1510 return rc;
1511
1512 sum += data[1];
1513
1514 if (data[1] < min)
1515 min = data[1];
1516
1517 if (data[1] > max)
1518 max = data[1];
1519 }
1520 rc = sum - max - min;
1521
1522 return rc;
1523}
1524
1525static int r820t_imr_cross(struct r820t_priv *priv,
1526 struct r820t_sect_type iq_point[3],
1527 u8 *x_direct)
1528{
1529 struct r820t_sect_type cross[5]; /* (0,0)(0,Q-1)(0,I-1)(Q-1,0)(I-1,0) */
1530 struct r820t_sect_type tmp;
1531 int i, rc;
1532 u8 reg08, reg09;
1533
1534 reg08 = r820t_read_cache_reg(priv, 8) & 0xc0;
1535 reg09 = r820t_read_cache_reg(priv, 9) & 0xc0;
1536
1537 tmp.gain_x = 0;
1538 tmp.phase_y = 0;
1539 tmp.value = 255;
1540
1541 for (i = 0; i < 5; i++) {
1542 switch (i) {
1543 case 0:
1544 cross[i].gain_x = reg08;
1545 cross[i].phase_y = reg09;
1546 break;
1547 case 1:
1548 cross[i].gain_x = reg08; /* 0 */
1549 cross[i].phase_y = reg09 + 1; /* Q-1 */
1550 break;
1551 case 2:
1552 cross[i].gain_x = reg08; /* 0 */
1553 cross[i].phase_y = (reg09 | 0x20) + 1; /* I-1 */
1554 break;
1555 case 3:
1556 cross[i].gain_x = reg08 + 1; /* Q-1 */
1557 cross[i].phase_y = reg09;
1558 break;
1559 default:
1560 cross[i].gain_x = (reg08 | 0x20) + 1; /* I-1 */
1561 cross[i].phase_y = reg09;
1562 }
1563
1564 rc = r820t_write_reg(priv, 0x08, cross[i].gain_x);
1565 if (rc < 0)
1566 return rc;
1567
1568 rc = r820t_write_reg(priv, 0x09, cross[i].phase_y);
1569 if (rc < 0)
1570 return rc;
1571
1572 rc = r820t_multi_read(priv);
1573 if (rc < 0)
1574 return rc;
1575
1576 cross[i].value = rc;
1577
1578 if (cross[i].value < tmp.value)
1579 tmp = cross[i];
1580 }
1581
1582 if ((tmp.phase_y & 0x1f) == 1) { /* y-direction */
1583 *x_direct = 0;
1584
1585 iq_point[0] = cross[0];
1586 iq_point[1] = cross[1];
1587 iq_point[2] = cross[2];
1588 } else { /* (0,0) or x-direction */
1589 *x_direct = 1;
1590
1591 iq_point[0] = cross[0];
1592 iq_point[1] = cross[3];
1593 iq_point[2] = cross[4];
1594 }
1595 return 0;
1596}
1597
1598static void r820t_compre_cor(struct r820t_sect_type iq[3])
1599{
1600 int i;
1601
1602 for (i = 3; i > 0; i--) {
1603 if (iq[0].value > iq[i - 1].value)
1604 swap(iq[0], iq[i - 1]);
1605 }
1606}
1607
1608static int r820t_compre_step(struct r820t_priv *priv,
1609 struct r820t_sect_type iq[3], u8 reg)
1610{
1611 int rc;
1612 struct r820t_sect_type tmp;
1613
1614 /*
1615 * Purpose: if (Gain<9 or Phase<9), Gain+1 or Phase+1 and compare
1616 * with min value:
1617 * new < min => update to min and continue
1618 * new > min => Exit
1619 */
1620
1621 /* min value already saved in iq[0] */
1622 tmp.phase_y = iq[0].phase_y;
1623 tmp.gain_x = iq[0].gain_x;
1624
1625 while (((tmp.gain_x & 0x1f) < IMR_TRIAL) &&
1626 ((tmp.phase_y & 0x1f) < IMR_TRIAL)) {
1627 if (reg == 0x08)
1628 tmp.gain_x++;
1629 else
1630 tmp.phase_y++;
1631
1632 rc = r820t_write_reg(priv, 0x08, tmp.gain_x);
1633 if (rc < 0)
1634 return rc;
1635
1636 rc = r820t_write_reg(priv, 0x09, tmp.phase_y);
1637 if (rc < 0)
1638 return rc;
1639
1640 rc = r820t_multi_read(priv);
1641 if (rc < 0)
1642 return rc;
1643 tmp.value = rc;
1644
1645 if (tmp.value <= iq[0].value) {
1646 iq[0].gain_x = tmp.gain_x;
1647 iq[0].phase_y = tmp.phase_y;
1648 iq[0].value = tmp.value;
1649 } else {
1650 return 0;
1651 }
1652
1653 }
1654
1655 return 0;
1656}
1657
1658static int r820t_iq_tree(struct r820t_priv *priv,
1659 struct r820t_sect_type iq[3],
1660 u8 fix_val, u8 var_val, u8 fix_reg)
1661{
1662 int rc, i;
1663 u8 tmp, var_reg;
1664
1665 /*
1666 * record IMC results by input gain/phase location then adjust
1667 * gain or phase positive 1 step and negative 1 step,
1668 * both record results
1669 */
1670
1671 if (fix_reg == 0x08)
1672 var_reg = 0x09;
1673 else
1674 var_reg = 0x08;
1675
1676 for (i = 0; i < 3; i++) {
1677 rc = r820t_write_reg(priv, fix_reg, fix_val);
1678 if (rc < 0)
1679 return rc;
1680
1681 rc = r820t_write_reg(priv, var_reg, var_val);
1682 if (rc < 0)
1683 return rc;
1684
1685 rc = r820t_multi_read(priv);
1686 if (rc < 0)
1687 return rc;
1688 iq[i].value = rc;
1689
1690 if (fix_reg == 0x08) {
1691 iq[i].gain_x = fix_val;
1692 iq[i].phase_y = var_val;
1693 } else {
1694 iq[i].phase_y = fix_val;
1695 iq[i].gain_x = var_val;
1696 }
1697
1698 if (i == 0) { /* try right-side point */
1699 var_val++;
1700 } else if (i == 1) { /* try left-side point */
1701 /* if absolute location is 1, change I/Q direction */
1702 if ((var_val & 0x1f) < 0x02) {
1703 tmp = 2 - (var_val & 0x1f);
1704
1705 /* b[5]:I/Q selection. 0:Q-path, 1:I-path */
1706 if (var_val & 0x20) {
1707 var_val &= 0xc0;
1708 var_val |= tmp;
1709 } else {
1710 var_val |= 0x20 | tmp;
1711 }
1712 } else {
1713 var_val -= 2;
1714 }
1715 }
1716 }
1717
1718 return 0;
1719}
1720
1721static int r820t_section(struct r820t_priv *priv,
1722 struct r820t_sect_type *iq_point)
1723{
1724 int rc;
1725 struct r820t_sect_type compare_iq[3], compare_bet[3];
1726
1727 /* Try X-1 column and save min result to compare_bet[0] */
1728 if (!(iq_point->gain_x & 0x1f))
1729 compare_iq[0].gain_x = ((iq_point->gain_x) & 0xdf) + 1; /* Q-path, Gain=1 */
1730 else
1731 compare_iq[0].gain_x = iq_point->gain_x - 1; /* left point */
1732 compare_iq[0].phase_y = iq_point->phase_y;
1733
1734 /* y-direction */
1735 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1736 compare_iq[0].phase_y, 0x08);
1737 if (rc < 0)
1738 return rc;
1739
1740 r820t_compre_cor(compare_iq);
1741
1742 compare_bet[0] = compare_iq[0];
1743
1744 /* Try X column and save min result to compare_bet[1] */
1745 compare_iq[0].gain_x = iq_point->gain_x;
1746 compare_iq[0].phase_y = iq_point->phase_y;
1747
1748 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1749 compare_iq[0].phase_y, 0x08);
1750 if (rc < 0)
1751 return rc;
1752
1753 r820t_compre_cor(compare_iq);
1754
1755 compare_bet[1] = compare_iq[0];
1756
1757 /* Try X+1 column and save min result to compare_bet[2] */
1758 if ((iq_point->gain_x & 0x1f) == 0x00)
1759 compare_iq[0].gain_x = ((iq_point->gain_x) | 0x20) + 1; /* I-path, Gain=1 */
1760 else
1761 compare_iq[0].gain_x = iq_point->gain_x + 1;
1762 compare_iq[0].phase_y = iq_point->phase_y;
1763
1764 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1765 compare_iq[0].phase_y, 0x08);
1766 if (rc < 0)
1767 return rc;
1768
1769 r820t_compre_cor(compare_iq);
1770
1771 compare_bet[2] = compare_iq[0];
1772
1773 r820t_compre_cor(compare_bet);
1774
1775 *iq_point = compare_bet[0];
1776
1777 return 0;
1778}
1779
1780static int r820t_vga_adjust(struct r820t_priv *priv)
1781{
1782 int rc;
1783 u8 vga_count;
1784
1785 /* increase vga power to let image significant */
1786 for (vga_count = 12; vga_count < 16; vga_count++) {
1787 rc = r820t_write_reg_mask(priv, 0x0c, vga_count, 0x0f);
1788 if (rc < 0)
1789 return rc;
1790
1791 usleep_range(10000, 11000);
1792
1793 rc = r820t_multi_read(priv);
1794 if (rc < 0)
1795 return rc;
1796
1797 if (rc > 40 * 4)
1798 break;
1799 }
1800
1801 return 0;
1802}
1803
1804static int r820t_iq(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1805{
1806 struct r820t_sect_type compare_iq[3];
1807 int rc;
1808 u8 x_direction = 0; /* 1:x, 0:y */
1809 u8 dir_reg, other_reg;
1810
1811 r820t_vga_adjust(priv);
1812
1813 rc = r820t_imr_cross(priv, compare_iq, &x_direction);
1814 if (rc < 0)
1815 return rc;
1816
1817 if (x_direction == 1) {
1818 dir_reg = 0x08;
1819 other_reg = 0x09;
1820 } else {
1821 dir_reg = 0x09;
1822 other_reg = 0x08;
1823 }
1824
1825 /* compare and find min of 3 points. determine i/q direction */
1826 r820t_compre_cor(compare_iq);
1827
1828 /* increase step to find min value of this direction */
1829 rc = r820t_compre_step(priv, compare_iq, dir_reg);
1830 if (rc < 0)
1831 return rc;
1832
1833 /* the other direction */
1834 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1835 compare_iq[0].phase_y, dir_reg);
1836 if (rc < 0)
1837 return rc;
1838
1839 /* compare and find min of 3 points. determine i/q direction */
1840 r820t_compre_cor(compare_iq);
1841
1842 /* increase step to find min value on this direction */
1843 rc = r820t_compre_step(priv, compare_iq, other_reg);
1844 if (rc < 0)
1845 return rc;
1846
1847 /* check 3 points again */
1848 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1849 compare_iq[0].phase_y, other_reg);
1850 if (rc < 0)
1851 return rc;
1852
1853 r820t_compre_cor(compare_iq);
1854
1855 /* section-9 check */
1856 rc = r820t_section(priv, compare_iq);
1857
1858 *iq_pont = compare_iq[0];
1859
1860 /* reset gain/phase control setting */
1861 rc = r820t_write_reg_mask(priv, 0x08, 0, 0x3f);
1862 if (rc < 0)
1863 return rc;
1864
1865 rc = r820t_write_reg_mask(priv, 0x09, 0, 0x3f);
1866
1867 return rc;
1868}
1869
1870static int r820t_f_imr(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1871{
1872 int rc;
1873
1874 r820t_vga_adjust(priv);
1875
1876 /*
1877 * search surrounding points from previous point
1878 * try (x-1), (x), (x+1) columns, and find min IMR result point
1879 */
1880 rc = r820t_section(priv, iq_pont);
1881 if (rc < 0)
1882 return rc;
1883
1884 return 0;
1885}
1886
1887static int r820t_imr(struct r820t_priv *priv, unsigned imr_mem, bool im_flag)
1888{
1889 struct r820t_sect_type imr_point;
1890 int rc;
1891 u32 ring_vco, ring_freq, ring_ref;
1892 u8 n_ring, n;
1893 int reg18, reg19, reg1f;
1894
1895 if (priv->cfg->xtal > 24000000)
1896 ring_ref = priv->cfg->xtal / 2000;
1897 else
1898 ring_ref = priv->cfg->xtal / 1000;
1899
1900 n_ring = 15;
1901 for (n = 0; n < 16; n++) {
1902 if ((16 + n) * 8 * ring_ref >= 3100000) {
1903 n_ring = n;
1904 break;
1905 }
1906 }
1907
1908 reg18 = r820t_read_cache_reg(priv, 0x18);
1909 reg19 = r820t_read_cache_reg(priv, 0x19);
1910 reg1f = r820t_read_cache_reg(priv, 0x1f);
1911
1912 reg18 &= 0xf0; /* set ring[3:0] */
1913 reg18 |= n_ring;
1914
1915 ring_vco = (16 + n_ring) * 8 * ring_ref;
1916
1917 reg18 &= 0xdf; /* clear ring_se23 */
1918 reg19 &= 0xfc; /* clear ring_seldiv */
1919 reg1f &= 0xfc; /* clear ring_att */
1920
1921 switch (imr_mem) {
1922 case 0:
1923 ring_freq = ring_vco / 48;
1924 reg18 |= 0x20; /* ring_se23 = 1 */
1925 reg19 |= 0x03; /* ring_seldiv = 3 */
1926 reg1f |= 0x02; /* ring_att 10 */
1927 break;
1928 case 1:
1929 ring_freq = ring_vco / 16;
1930 reg18 |= 0x00; /* ring_se23 = 0 */
1931 reg19 |= 0x02; /* ring_seldiv = 2 */
1932 reg1f |= 0x00; /* pw_ring 00 */
1933 break;
1934 case 2:
1935 ring_freq = ring_vco / 8;
1936 reg18 |= 0x00; /* ring_se23 = 0 */
1937 reg19 |= 0x01; /* ring_seldiv = 1 */
1938 reg1f |= 0x03; /* pw_ring 11 */
1939 break;
1940 case 3:
1941 ring_freq = ring_vco / 6;
1942 reg18 |= 0x20; /* ring_se23 = 1 */
1943 reg19 |= 0x00; /* ring_seldiv = 0 */
1944 reg1f |= 0x03; /* pw_ring 11 */
1945 break;
1946 case 4:
1947 ring_freq = ring_vco / 4;
1948 reg18 |= 0x00; /* ring_se23 = 0 */
1949 reg19 |= 0x00; /* ring_seldiv = 0 */
1950 reg1f |= 0x01; /* pw_ring 01 */
1951 break;
1952 default:
1953 ring_freq = ring_vco / 4;
1954 reg18 |= 0x00; /* ring_se23 = 0 */
1955 reg19 |= 0x00; /* ring_seldiv = 0 */
1956 reg1f |= 0x01; /* pw_ring 01 */
1957 break;
1958 }
1959
1960
1961 /* write pw_ring, n_ring, ringdiv2 registers */
1962
1963 /* n_ring, ring_se23 */
1964 rc = r820t_write_reg(priv, 0x18, reg18);
1965 if (rc < 0)
1966 return rc;
1967
1968 /* ring_sediv */
1969 rc = r820t_write_reg(priv, 0x19, reg19);
1970 if (rc < 0)
1971 return rc;
1972
1973 /* pw_ring */
1974 rc = r820t_write_reg(priv, 0x1f, reg1f);
1975 if (rc < 0)
1976 return rc;
1977
1978 /* mux input freq ~ rf_in freq */
1979 rc = r820t_set_mux(priv, (ring_freq - 5300) * 1000);
1980 if (rc < 0)
1981 return rc;
1982
1983 rc = r820t_set_pll(priv, V4L2_TUNER_DIGITAL_TV,
1984 (ring_freq - 5300) * 1000);
1985 if (!priv->has_lock)
1986 rc = -EINVAL;
1987 if (rc < 0)
1988 return rc;
1989
1990 if (im_flag) {
1991 rc = r820t_iq(priv, &imr_point);
1992 } else {
1993 imr_point.gain_x = priv->imr_data[3].gain_x;
1994 imr_point.phase_y = priv->imr_data[3].phase_y;
1995 imr_point.value = priv->imr_data[3].value;
1996
1997 rc = r820t_f_imr(priv, &imr_point);
1998 }
1999 if (rc < 0)
2000 return rc;
2001
2002 /* save IMR value */
2003 switch (imr_mem) {
2004 case 0:
2005 priv->imr_data[0].gain_x = imr_point.gain_x;
2006 priv->imr_data[0].phase_y = imr_point.phase_y;
2007 priv->imr_data[0].value = imr_point.value;
2008 break;
2009 case 1:
2010 priv->imr_data[1].gain_x = imr_point.gain_x;
2011 priv->imr_data[1].phase_y = imr_point.phase_y;
2012 priv->imr_data[1].value = imr_point.value;
2013 break;
2014 case 2:
2015 priv->imr_data[2].gain_x = imr_point.gain_x;
2016 priv->imr_data[2].phase_y = imr_point.phase_y;
2017 priv->imr_data[2].value = imr_point.value;
2018 break;
2019 case 3:
2020 priv->imr_data[3].gain_x = imr_point.gain_x;
2021 priv->imr_data[3].phase_y = imr_point.phase_y;
2022 priv->imr_data[3].value = imr_point.value;
2023 break;
2024 case 4:
2025 priv->imr_data[4].gain_x = imr_point.gain_x;
2026 priv->imr_data[4].phase_y = imr_point.phase_y;
2027 priv->imr_data[4].value = imr_point.value;
2028 break;
2029 default:
2030 priv->imr_data[4].gain_x = imr_point.gain_x;
2031 priv->imr_data[4].phase_y = imr_point.phase_y;
2032 priv->imr_data[4].value = imr_point.value;
2033 break;
2034 }
2035
2036 return 0;
2037}
2038
2039static int r820t_imr_callibrate(struct r820t_priv *priv)
2040{
2041 int rc, i;
2042 int xtal_cap = 0;
2043
2044 if (priv->init_done)
2045 return 0;
2046
2047 /* Detect Xtal capacitance */
2048 if ((priv->cfg->rafael_chip == CHIP_R820T) ||
2049 (priv->cfg->rafael_chip == CHIP_R828S) ||
2050 (priv->cfg->rafael_chip == CHIP_R820C)) {
2051 priv->xtal_cap_sel = XTAL_HIGH_CAP_0P;
2052 } else {
2053 /* Initialize registers */
2054 rc = r820t_write(priv, 0x05,
2055 r820t_init_array, sizeof(r820t_init_array));
2056 if (rc < 0)
2057 return rc;
2058 for (i = 0; i < 3; i++) {
2059 rc = r820t_xtal_check(priv);
2060 if (rc < 0)
2061 return rc;
2062 if (!i || rc > xtal_cap)
2063 xtal_cap = rc;
2064 }
2065 priv->xtal_cap_sel = xtal_cap;
2066 }
2067
2068 /*
2069 * Disables IMR calibration. That emulates the same behaviour
2070 * as what is done by rtl-sdr userspace library. Useful for testing
2071 */
2072 if (no_imr_cal) {
2073 priv->init_done = true;
2074
2075 return 0;
2076 }
2077
2078 /* Initialize registers */
2079 rc = r820t_write(priv, 0x05,
2080 r820t_init_array, sizeof(r820t_init_array));
2081 if (rc < 0)
2082 return rc;
2083
2084 rc = r820t_imr_prepare(priv);
2085 if (rc < 0)
2086 return rc;
2087
2088 rc = r820t_imr(priv, 3, true);
2089 if (rc < 0)
2090 return rc;
2091 rc = r820t_imr(priv, 1, false);
2092 if (rc < 0)
2093 return rc;
2094 rc = r820t_imr(priv, 0, false);
2095 if (rc < 0)
2096 return rc;
2097 rc = r820t_imr(priv, 2, false);
2098 if (rc < 0)
2099 return rc;
2100 rc = r820t_imr(priv, 4, false);
2101 if (rc < 0)
2102 return rc;
2103
2104 priv->init_done = true;
2105 priv->imr_done = true;
2106
2107 return 0;
2108}
2109
2110#if 0
2111/* Not used, for now */
2112static int r820t_gpio(struct r820t_priv *priv, bool enable)
2113{
2114 return r820t_write_reg_mask(priv, 0x0f, enable ? 1 : 0, 0x01);
2115}
2116#endif
2117
2118/*
2119 * r820t frontend operations and tuner attach code
2120 *
2121 * All driver locks and i2c control are only in this part of the code
2122 */
2123
2124static int r820t_init(struct dvb_frontend *fe)
2125{
2126 struct r820t_priv *priv = fe->tuner_priv;
2127 int rc;
2128
2129 tuner_dbg("%s:\n", __func__);
2130
2131 mutex_lock(&priv->lock);
2132 if (fe->ops.i2c_gate_ctrl)
2133 fe->ops.i2c_gate_ctrl(fe, 1);
2134
2135 rc = r820t_imr_callibrate(priv);
2136 if (rc < 0)
2137 goto err;
2138
2139 /* Initialize registers */
2140 rc = r820t_write(priv, 0x05,
2141 r820t_init_array, sizeof(r820t_init_array));
2142
2143err:
2144 if (fe->ops.i2c_gate_ctrl)
2145 fe->ops.i2c_gate_ctrl(fe, 0);
2146 mutex_unlock(&priv->lock);
2147
2148 if (rc < 0)
2149 tuner_dbg("%s: failed=%d\n", __func__, rc);
2150 return rc;
2151}
2152
2153static int r820t_sleep(struct dvb_frontend *fe)
2154{
2155 struct r820t_priv *priv = fe->tuner_priv;
2156 int rc;
2157
2158 tuner_dbg("%s:\n", __func__);
2159
2160 mutex_lock(&priv->lock);
2161 if (fe->ops.i2c_gate_ctrl)
2162 fe->ops.i2c_gate_ctrl(fe, 1);
2163
2164 rc = r820t_standby(priv);
2165
2166 if (fe->ops.i2c_gate_ctrl)
2167 fe->ops.i2c_gate_ctrl(fe, 0);
2168 mutex_unlock(&priv->lock);
2169
2170 tuner_dbg("%s: failed=%d\n", __func__, rc);
2171 return rc;
2172}
2173
2174static int r820t_set_analog_freq(struct dvb_frontend *fe,
2175 struct analog_parameters *p)
2176{
2177 struct r820t_priv *priv = fe->tuner_priv;
2178 unsigned bw;
2179 int rc;
2180
2181 tuner_dbg("%s called\n", __func__);
2182
2183 /* if std is not defined, choose one */
2184 if (!p->std)
2185 p->std = V4L2_STD_MN;
2186
2187 if ((p->std == V4L2_STD_PAL_M) || (p->std == V4L2_STD_NTSC))
2188 bw = 6;
2189 else
2190 bw = 8;
2191
2192 mutex_lock(&priv->lock);
2193 if (fe->ops.i2c_gate_ctrl)
2194 fe->ops.i2c_gate_ctrl(fe, 1);
2195
2196 rc = generic_set_freq(fe, 62500l * p->frequency, bw,
2197 V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED);
2198
2199 if (fe->ops.i2c_gate_ctrl)
2200 fe->ops.i2c_gate_ctrl(fe, 0);
2201 mutex_unlock(&priv->lock);
2202
2203 return rc;
2204}
2205
2206static int r820t_set_params(struct dvb_frontend *fe)
2207{
2208 struct r820t_priv *priv = fe->tuner_priv;
2209 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2210 int rc;
2211 unsigned bw;
2212
2213 tuner_dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
2214 __func__, c->delivery_system, c->frequency, c->bandwidth_hz);
2215
2216 mutex_lock(&priv->lock);
2217 if (fe->ops.i2c_gate_ctrl)
2218 fe->ops.i2c_gate_ctrl(fe, 1);
2219
2220 bw = (c->bandwidth_hz + 500000) / 1000000;
2221 if (!bw)
2222 bw = 8;
2223
2224 rc = generic_set_freq(fe, c->frequency, bw,
2225 V4L2_TUNER_DIGITAL_TV, 0, c->delivery_system);
2226
2227 if (fe->ops.i2c_gate_ctrl)
2228 fe->ops.i2c_gate_ctrl(fe, 0);
2229 mutex_unlock(&priv->lock);
2230
2231 if (rc)
2232 tuner_dbg("%s: failed=%d\n", __func__, rc);
2233 return rc;
2234}
2235
2236static int r820t_signal(struct dvb_frontend *fe, u16 *strength)
2237{
2238 struct r820t_priv *priv = fe->tuner_priv;
2239 int rc = 0;
2240
2241 mutex_lock(&priv->lock);
2242 if (fe->ops.i2c_gate_ctrl)
2243 fe->ops.i2c_gate_ctrl(fe, 1);
2244
2245 if (priv->has_lock) {
2246 rc = r820t_read_gain(priv);
2247 if (rc < 0)
2248 goto err;
2249
2250 /* A higher gain at LNA means a lower signal strength */
2251 *strength = (45 - rc) << 4 | 0xff;
2252 if (*strength == 0xff)
2253 *strength = 0;
2254 } else {
2255 *strength = 0;
2256 }
2257
2258err:
2259 if (fe->ops.i2c_gate_ctrl)
2260 fe->ops.i2c_gate_ctrl(fe, 0);
2261 mutex_unlock(&priv->lock);
2262
2263 tuner_dbg("%s: %s, gain=%d strength=%d\n",
2264 __func__,
2265 priv->has_lock ? "PLL locked" : "no signal",
2266 rc, *strength);
2267
2268 return 0;
2269}
2270
2271static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
2272{
2273 struct r820t_priv *priv = fe->tuner_priv;
2274
2275 tuner_dbg("%s:\n", __func__);
2276
2277 *frequency = priv->int_freq;
2278
2279 return 0;
2280}
2281
2282static void r820t_release(struct dvb_frontend *fe)
2283{
2284 struct r820t_priv *priv = fe->tuner_priv;
2285
2286 tuner_dbg("%s:\n", __func__);
2287
2288 mutex_lock(&r820t_list_mutex);
2289
2290 if (priv)
2291 hybrid_tuner_release_state(priv);
2292
2293 mutex_unlock(&r820t_list_mutex);
2294
2295 fe->tuner_priv = NULL;
2296}
2297
2298static const struct dvb_tuner_ops r820t_tuner_ops = {
2299 .info = {
2300 .name = "Rafael Micro R820T",
2301 .frequency_min_hz = 42 * MHz,
2302 .frequency_max_hz = 1002 * MHz,
2303 },
2304 .init = r820t_init,
2305 .release = r820t_release,
2306 .sleep = r820t_sleep,
2307 .set_params = r820t_set_params,
2308 .set_analog_params = r820t_set_analog_freq,
2309 .get_if_frequency = r820t_get_if_frequency,
2310 .get_rf_strength = r820t_signal,
2311};
2312
2313struct dvb_frontend *r820t_attach(struct dvb_frontend *fe,
2314 struct i2c_adapter *i2c,
2315 const struct r820t_config *cfg)
2316{
2317 struct r820t_priv *priv;
2318 int rc = -ENODEV;
2319 u8 data[5];
2320 int instance;
2321
2322 mutex_lock(&r820t_list_mutex);
2323
2324 instance = hybrid_tuner_request_state(struct r820t_priv, priv,
2325 hybrid_tuner_instance_list,
2326 i2c, cfg->i2c_addr,
2327 "r820t");
2328 switch (instance) {
2329 case 0:
2330 /* memory allocation failure */
2331 goto err_no_gate;
2332 case 1:
2333 /* new tuner instance */
2334 priv->cfg = cfg;
2335
2336 mutex_init(&priv->lock);
2337
2338 fe->tuner_priv = priv;
2339 break;
2340 case 2:
2341 /* existing tuner instance */
2342 fe->tuner_priv = priv;
2343 break;
2344 }
2345
2346 if (fe->ops.i2c_gate_ctrl)
2347 fe->ops.i2c_gate_ctrl(fe, 1);
2348
2349 /* check if the tuner is there */
2350 rc = r820t_read(priv, 0x00, data, sizeof(data));
2351 if (rc < 0)
2352 goto err;
2353
2354 rc = r820t_sleep(fe);
2355 if (rc < 0)
2356 goto err;
2357
2358 tuner_info("Rafael Micro r820t successfully identified\n");
2359
2360 if (fe->ops.i2c_gate_ctrl)
2361 fe->ops.i2c_gate_ctrl(fe, 0);
2362
2363 mutex_unlock(&r820t_list_mutex);
2364
2365 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops,
2366 sizeof(struct dvb_tuner_ops));
2367
2368 return fe;
2369err:
2370 if (fe->ops.i2c_gate_ctrl)
2371 fe->ops.i2c_gate_ctrl(fe, 0);
2372
2373err_no_gate:
2374 mutex_unlock(&r820t_list_mutex);
2375
2376 pr_info("%s: failed=%d\n", __func__, rc);
2377 r820t_release(fe);
2378 return NULL;
2379}
2380EXPORT_SYMBOL_GPL(r820t_attach);
2381
2382MODULE_DESCRIPTION("Rafael Micro r820t silicon tuner driver");
2383MODULE_AUTHOR("Mauro Carvalho Chehab");
2384MODULE_LICENSE("GPL v2");
2385