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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / media / tuners / r820t.c
blob6ab35e315fe7a2dd11ce4078357b0dffff98d1b8
1 /*
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 * This program is free software; you can redistribute it and/or modify
24 * it under the terms of the GNU General Public License as published by
25 * the Free Software Foundation; either version 2 of the License, or
26 * (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 * GNU General Public License for more details.
32 *
33 */
34
35 #include <linux/videodev2.h>
36 #include <linux/mutex.h>
37 #include <linux/slab.h>
38 #include <linux/bitrev.h>
39
40 #include "tuner-i2c.h"
41 #include "r820t.h"
42
43 /*
44 * FIXME: I think that there are only 32 registers, but better safe than
45 * sorry. After finishing the driver, we may review it.
46 */
47 #define REG_SHADOW_START 5
48 #define NUM_REGS 27
49 #define NUM_IMR 5
50 #define IMR_TRIAL 9
51
52 #define VER_NUM 49
53
54 static int debug;
55 module_param(debug, int, 0644);
56 MODULE_PARM_DESC(debug, "enable verbose debug messages");
57
58 static int no_imr_cal;
59 module_param(no_imr_cal, int, 0444);
60 MODULE_PARM_DESC(no_imr_cal, "Disable IMR calibration at module init");
61
62
63 /*
64 * enums and structures
65 */
66
67 enum xtal_cap_value {
68 XTAL_LOW_CAP_30P = 0,
69 XTAL_LOW_CAP_20P,
70 XTAL_LOW_CAP_10P,
71 XTAL_LOW_CAP_0P,
72 XTAL_HIGH_CAP_0P
73 };
74
75 struct r820t_sect_type {
76 u8 phase_y;
77 u8 gain_x;
78 u16 value;
79 };
80
81 struct r820t_priv {
82 struct list_head hybrid_tuner_instance_list;
83 const struct r820t_config *cfg;
84 struct tuner_i2c_props i2c_props;
85 struct mutex lock;
86
87 u8 regs[NUM_REGS];
88 u8 buf[NUM_REGS + 1];
89 enum xtal_cap_value xtal_cap_sel;
90 u16 pll; /* kHz */
91 u32 int_freq;
92 u8 fil_cal_code;
93 bool imr_done;
94 bool has_lock;
95 bool init_done;
96 struct r820t_sect_type imr_data[NUM_IMR];
97
98 /* Store current mode */
99 u32 delsys;
100 enum v4l2_tuner_type type;
101 v4l2_std_id std;
102 u32 bw; /* in MHz */
103 };
104
105 struct r820t_freq_range {
106 u32 freq;
107 u8 open_d;
108 u8 rf_mux_ploy;
109 u8 tf_c;
110 u8 xtal_cap20p;
111 u8 xtal_cap10p;
112 u8 xtal_cap0p;
113 u8 imr_mem; /* Not used, currently */
114 };
115
116 #define VCO_POWER_REF 0x02
117 #define DIP_FREQ 32000000
118
119 /*
120 * Static constants
121 */
122
123 static LIST_HEAD(hybrid_tuner_instance_list);
124 static DEFINE_MUTEX(r820t_list_mutex);
125
126 /* Those initial values start from REG_SHADOW_START */
127 static const u8 r820t_init_array[NUM_REGS] = {
128 0x83, 0x32, 0x75, /* 05 to 07 */
129 0xc0, 0x40, 0xd6, 0x6c, /* 08 to 0b */
130 0xf5, 0x63, 0x75, 0x68, /* 0c to 0f */
131 0x6c, 0x83, 0x80, 0x00, /* 10 to 13 */
132 0x0f, 0x00, 0xc0, 0x30, /* 14 to 17 */
133 0x48, 0xcc, 0x60, 0x00, /* 18 to 1b */
134 0x54, 0xae, 0x4a, 0xc0 /* 1c to 1f */
135 };
136
137 /* Tuner frequency ranges */
138 static const struct r820t_freq_range freq_ranges[] = {
139 {
140 .freq = 0,
141 .open_d = 0x08, /* low */
142 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
143 .tf_c = 0xdf, /* R27[7:0] band2,band0 */
144 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
145 .xtal_cap10p = 0x01,
146 .xtal_cap0p = 0x00,
147 .imr_mem = 0,
148 }, {
149 .freq = 50, /* Start freq, in MHz */
150 .open_d = 0x08, /* low */
151 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
152 .tf_c = 0xbe, /* R27[7:0] band4,band1 */
153 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
154 .xtal_cap10p = 0x01,
155 .xtal_cap0p = 0x00,
156 .imr_mem = 0,
157 }, {
158 .freq = 55, /* Start freq, in MHz */
159 .open_d = 0x08, /* low */
160 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
161 .tf_c = 0x8b, /* R27[7:0] band7,band4 */
162 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
163 .xtal_cap10p = 0x01,
164 .xtal_cap0p = 0x00,
165 .imr_mem = 0,
166 }, {
167 .freq = 60, /* Start freq, in MHz */
168 .open_d = 0x08, /* low */
169 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
170 .tf_c = 0x7b, /* R27[7:0] band8,band4 */
171 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
172 .xtal_cap10p = 0x01,
173 .xtal_cap0p = 0x00,
174 .imr_mem = 0,
175 }, {
176 .freq = 65, /* Start freq, in MHz */
177 .open_d = 0x08, /* low */
178 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
179 .tf_c = 0x69, /* R27[7:0] band9,band6 */
180 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
181 .xtal_cap10p = 0x01,
182 .xtal_cap0p = 0x00,
183 .imr_mem = 0,
184 }, {
185 .freq = 70, /* Start freq, in MHz */
186 .open_d = 0x08, /* low */
187 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
188 .tf_c = 0x58, /* R27[7:0] band10,band7 */
189 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
190 .xtal_cap10p = 0x01,
191 .xtal_cap0p = 0x00,
192 .imr_mem = 0,
193 }, {
194 .freq = 75, /* Start freq, in MHz */
195 .open_d = 0x00, /* high */
196 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
197 .tf_c = 0x44, /* R27[7:0] band11,band11 */
198 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
199 .xtal_cap10p = 0x01,
200 .xtal_cap0p = 0x00,
201 .imr_mem = 0,
202 }, {
203 .freq = 80, /* Start freq, in MHz */
204 .open_d = 0x00, /* high */
205 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
206 .tf_c = 0x44, /* R27[7:0] band11,band11 */
207 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
208 .xtal_cap10p = 0x01,
209 .xtal_cap0p = 0x00,
210 .imr_mem = 0,
211 }, {
212 .freq = 90, /* Start freq, in MHz */
213 .open_d = 0x00, /* high */
214 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
215 .tf_c = 0x34, /* R27[7:0] band12,band11 */
216 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
217 .xtal_cap10p = 0x01,
218 .xtal_cap0p = 0x00,
219 .imr_mem = 0,
220 }, {
221 .freq = 100, /* Start freq, in MHz */
222 .open_d = 0x00, /* high */
223 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
224 .tf_c = 0x34, /* R27[7:0] band12,band11 */
225 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
226 .xtal_cap10p = 0x01,
227 .xtal_cap0p = 0x00,
228 .imr_mem = 0,
229 }, {
230 .freq = 110, /* Start freq, in MHz */
231 .open_d = 0x00, /* high */
232 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
233 .tf_c = 0x24, /* R27[7:0] band13,band11 */
234 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
235 .xtal_cap10p = 0x01,
236 .xtal_cap0p = 0x00,
237 .imr_mem = 1,
238 }, {
239 .freq = 120, /* Start freq, in MHz */
240 .open_d = 0x00, /* high */
241 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
242 .tf_c = 0x24, /* R27[7:0] band13,band11 */
243 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
244 .xtal_cap10p = 0x01,
245 .xtal_cap0p = 0x00,
246 .imr_mem = 1,
247 }, {
248 .freq = 140, /* Start freq, in MHz */
249 .open_d = 0x00, /* high */
250 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
251 .tf_c = 0x14, /* R27[7:0] band14,band11 */
252 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
253 .xtal_cap10p = 0x01,
254 .xtal_cap0p = 0x00,
255 .imr_mem = 1,
256 }, {
257 .freq = 180, /* Start freq, in MHz */
258 .open_d = 0x00, /* high */
259 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
260 .tf_c = 0x13, /* R27[7:0] band14,band12 */
261 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
262 .xtal_cap10p = 0x00,
263 .xtal_cap0p = 0x00,
264 .imr_mem = 1,
265 }, {
266 .freq = 220, /* Start freq, in MHz */
267 .open_d = 0x00, /* high */
268 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
269 .tf_c = 0x13, /* R27[7:0] band14,band12 */
270 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
271 .xtal_cap10p = 0x00,
272 .xtal_cap0p = 0x00,
273 .imr_mem = 2,
274 }, {
275 .freq = 250, /* Start freq, in MHz */
276 .open_d = 0x00, /* high */
277 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
278 .tf_c = 0x11, /* R27[7:0] highest,highest */
279 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
280 .xtal_cap10p = 0x00,
281 .xtal_cap0p = 0x00,
282 .imr_mem = 2,
283 }, {
284 .freq = 280, /* Start freq, in MHz */
285 .open_d = 0x00, /* high */
286 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
287 .tf_c = 0x00, /* R27[7:0] highest,highest */
288 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
289 .xtal_cap10p = 0x00,
290 .xtal_cap0p = 0x00,
291 .imr_mem = 2,
292 }, {
293 .freq = 310, /* Start freq, in MHz */
294 .open_d = 0x00, /* high */
295 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
296 .tf_c = 0x00, /* R27[7:0] highest,highest */
297 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
298 .xtal_cap10p = 0x00,
299 .xtal_cap0p = 0x00,
300 .imr_mem = 2,
301 }, {
302 .freq = 450, /* Start freq, in MHz */
303 .open_d = 0x00, /* high */
304 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
305 .tf_c = 0x00, /* R27[7:0] highest,highest */
306 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
307 .xtal_cap10p = 0x00,
308 .xtal_cap0p = 0x00,
309 .imr_mem = 3,
310 }, {
311 .freq = 588, /* Start freq, in MHz */
312 .open_d = 0x00, /* high */
313 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
314 .tf_c = 0x00, /* R27[7:0] highest,highest */
315 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
316 .xtal_cap10p = 0x00,
317 .xtal_cap0p = 0x00,
318 .imr_mem = 3,
319 }, {
320 .freq = 650, /* Start freq, in MHz */
321 .open_d = 0x00, /* high */
322 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
323 .tf_c = 0x00, /* R27[7:0] highest,highest */
324 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
325 .xtal_cap10p = 0x00,
326 .xtal_cap0p = 0x00,
327 .imr_mem = 4,
328 }
329 };
330
331 static int r820t_xtal_capacitor[][2] = {
332 { 0x0b, XTAL_LOW_CAP_30P },
333 { 0x02, XTAL_LOW_CAP_20P },
334 { 0x01, XTAL_LOW_CAP_10P },
335 { 0x00, XTAL_LOW_CAP_0P },
336 { 0x10, XTAL_HIGH_CAP_0P },
337 };
338
339 /*
340 * measured with a Racal 6103E GSM test set at 928 MHz with -60 dBm
341 * input power, for raw results see:
342 * http://steve-m.de/projects/rtl-sdr/gain_measurement/r820t/
343 */
344
345 static const int r820t_lna_gain_steps[] = {
346 0, 9, 13, 40, 38, 13, 31, 22, 26, 31, 26, 14, 19, 5, 35, 13
347 };
348
349 static const int r820t_mixer_gain_steps[] = {
350 0, 5, 10, 10, 19, 9, 10, 25, 17, 10, 8, 16, 13, 6, 3, -8
351 };
352
353 /*
354 * I2C read/write code and shadow registers logic
355 */
356 static void shadow_store(struct r820t_priv *priv, u8 reg, const u8 *val,
357 int len)
358 {
359 int r = reg - REG_SHADOW_START;
360
361 if (r < 0) {
362 len += r;
363 r = 0;
364 }
365 if (len <= 0)
366 return;
367 if (len > NUM_REGS - r)
368 len = NUM_REGS - r;
369
370 tuner_dbg("%s: prev reg=%02x len=%d: %*ph\n",
371 __func__, r + REG_SHADOW_START, len, len, val);
372
373 memcpy(&priv->regs[r], val, len);
374 }
375
376 static int r820t_write(struct r820t_priv *priv, u8 reg, const u8 *val,
377 int len)
378 {
379 int rc, size, pos = 0;
380
381 /* Store the shadow registers */
382 shadow_store(priv, reg, val, len);
383
384 do {
385 if (len > priv->cfg->max_i2c_msg_len - 1)
386 size = priv->cfg->max_i2c_msg_len - 1;
387 else
388 size = len;
389
390 /* Fill I2C buffer */
391 priv->buf[0] = reg;
392 memcpy(&priv->buf[1], &val[pos], size);
393
394 rc = tuner_i2c_xfer_send(&priv->i2c_props, priv->buf, size + 1);
395 if (rc != size + 1) {
396 tuner_info("%s: i2c wr failed=%d reg=%02x len=%d: %*ph\n",
397 __func__, rc, reg, size, size, &priv->buf[1]);
398 if (rc < 0)
399 return rc;
400 return -EREMOTEIO;
401 }
402 tuner_dbg("%s: i2c wr reg=%02x len=%d: %*ph\n",
403 __func__, reg, size, size, &priv->buf[1]);
404
405 reg += size;
406 len -= size;
407 pos += size;
408 } while (len > 0);
409
410 return 0;
411 }
412
413 static int r820t_write_reg(struct r820t_priv *priv, u8 reg, u8 val)
414 {
415 return r820t_write(priv, reg, &val, 1);
416 }
417
418 static int r820t_read_cache_reg(struct r820t_priv *priv, int reg)
419 {
420 reg -= REG_SHADOW_START;
421
422 if (reg >= 0 && reg < NUM_REGS)
423 return priv->regs[reg];
424 else
425 return -EINVAL;
426 }
427
428 static int r820t_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val,
429 u8 bit_mask)
430 {
431 int rc = r820t_read_cache_reg(priv, reg);
432
433 if (rc < 0)
434 return rc;
435
436 val = (rc & ~bit_mask) | (val & bit_mask);
437
438 return r820t_write(priv, reg, &val, 1);
439 }
440
441 static int r820t_read(struct r820t_priv *priv, u8 reg, u8 *val, int len)
442 {
443 int rc, i;
444 u8 *p = &priv->buf[1];
445
446 priv->buf[0] = reg;
447
448 rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, priv->buf, 1, p, len);
449 if (rc != len) {
450 tuner_info("%s: i2c rd failed=%d reg=%02x len=%d: %*ph\n",
451 __func__, rc, reg, len, len, p);
452 if (rc < 0)
453 return rc;
454 return -EREMOTEIO;
455 }
456
457 /* Copy data to the output buffer */
458 for (i = 0; i < len; i++)
459 val[i] = bitrev8(p[i]);
460
461 tuner_dbg("%s: i2c rd reg=%02x len=%d: %*ph\n",
462 __func__, reg, len, len, val);
463
464 return 0;
465 }
466
467 /*
468 * r820t tuning logic
469 */
470
471 static int r820t_set_mux(struct r820t_priv *priv, u32 freq)
472 {
473 const struct r820t_freq_range *range;
474 int i, rc;
475 u8 val, reg08, reg09;
476
477 /* Get the proper frequency range */
478 freq = freq / 1000000;
479 for (i = 0; i < ARRAY_SIZE(freq_ranges) - 1; i++) {
480 if (freq < freq_ranges[i + 1].freq)
481 break;
482 }
483 range = &freq_ranges[i];
484
485 tuner_dbg("set r820t range#%d for frequency %d MHz\n", i, freq);
486
487 /* Open Drain */
488 rc = r820t_write_reg_mask(priv, 0x17, range->open_d, 0x08);
489 if (rc < 0)
490 return rc;
491
492 /* RF_MUX,Polymux */
493 rc = r820t_write_reg_mask(priv, 0x1a, range->rf_mux_ploy, 0xc3);
494 if (rc < 0)
495 return rc;
496
497 /* TF BAND */
498 rc = r820t_write_reg(priv, 0x1b, range->tf_c);
499 if (rc < 0)
500 return rc;
501
502 /* XTAL CAP & Drive */
503 switch (priv->xtal_cap_sel) {
504 case XTAL_LOW_CAP_30P:
505 case XTAL_LOW_CAP_20P:
506 val = range->xtal_cap20p | 0x08;
507 break;
508 case XTAL_LOW_CAP_10P:
509 val = range->xtal_cap10p | 0x08;
510 break;
511 case XTAL_HIGH_CAP_0P:
512 val = range->xtal_cap0p | 0x00;
513 break;
514 default:
515 case XTAL_LOW_CAP_0P:
516 val = range->xtal_cap0p | 0x08;
517 break;
518 }
519 rc = r820t_write_reg_mask(priv, 0x10, val, 0x0b);
520 if (rc < 0)
521 return rc;
522
523 if (priv->imr_done) {
524 reg08 = priv->imr_data[range->imr_mem].gain_x;
525 reg09 = priv->imr_data[range->imr_mem].phase_y;
526 } else {
527 reg08 = 0;
528 reg09 = 0;
529 }
530 rc = r820t_write_reg_mask(priv, 0x08, reg08, 0x3f);
531 if (rc < 0)
532 return rc;
533
534 rc = r820t_write_reg_mask(priv, 0x09, reg09, 0x3f);
535
536 return rc;
537 }
538
539 static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type,
540 u32 freq)
541 {
542 u32 vco_freq;
543 int rc, i;
544 unsigned sleep_time = 10000;
545 u32 vco_fra; /* VCO contribution by SDM (kHz) */
546 u32 vco_min = 1770000;
547 u32 vco_max = vco_min * 2;
548 u32 pll_ref;
549 u16 n_sdm = 2;
550 u16 sdm = 0;
551 u8 mix_div = 2;
552 u8 div_buf = 0;
553 u8 div_num = 0;
554 u8 refdiv2 = 0;
555 u8 ni, si, nint, vco_fine_tune, val;
556 u8 data[5];
557
558 /* Frequency in kHz */
559 freq = freq / 1000;
560 pll_ref = priv->cfg->xtal / 1000;
561
562 #if 0
563 /* Doesn't exist on rtl-sdk, and on field tests, caused troubles */
564 if ((priv->cfg->rafael_chip == CHIP_R620D) ||
565 (priv->cfg->rafael_chip == CHIP_R828D) ||
566 (priv->cfg->rafael_chip == CHIP_R828)) {
567 /* ref set refdiv2, reffreq = Xtal/2 on ATV application */
568 if (type != V4L2_TUNER_DIGITAL_TV) {
569 pll_ref /= 2;
570 refdiv2 = 0x10;
571 sleep_time = 20000;
572 }
573 } else {
574 if (priv->cfg->xtal > 24000000) {
575 pll_ref /= 2;
576 refdiv2 = 0x10;
577 }
578 }
579 #endif
580
581 rc = r820t_write_reg_mask(priv, 0x10, refdiv2, 0x10);
582 if (rc < 0)
583 return rc;
584
585 /* set pll autotune = 128kHz */
586 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
587 if (rc < 0)
588 return rc;
589
590 /* set VCO current = 100 */
591 rc = r820t_write_reg_mask(priv, 0x12, 0x80, 0xe0);
592 if (rc < 0)
593 return rc;
594
595 /* Calculate divider */
596 while (mix_div <= 64) {
597 if (((freq * mix_div) >= vco_min) &&
598 ((freq * mix_div) < vco_max)) {
599 div_buf = mix_div;
600 while (div_buf > 2) {
601 div_buf = div_buf >> 1;
602 div_num++;
603 }
604 break;
605 }
606 mix_div = mix_div << 1;
607 }
608
609 rc = r820t_read(priv, 0x00, data, sizeof(data));
610 if (rc < 0)
611 return rc;
612
613 vco_fine_tune = (data[4] & 0x30) >> 4;
614
615 tuner_dbg("mix_div=%d div_num=%d vco_fine_tune=%d\n",
616 mix_div, div_num, vco_fine_tune);
617
618 /*
619 * XXX: R828D/16MHz seems to have always vco_fine_tune=1.
620 * Due to that, this calculation goes wrong.
621 */
622 if (priv->cfg->rafael_chip != CHIP_R828D) {
623 if (vco_fine_tune > VCO_POWER_REF)
624 div_num = div_num - 1;
625 else if (vco_fine_tune < VCO_POWER_REF)
626 div_num = div_num + 1;
627 }
628
629 rc = r820t_write_reg_mask(priv, 0x10, div_num << 5, 0xe0);
630 if (rc < 0)
631 return rc;
632
633 vco_freq = freq * mix_div;
634 nint = vco_freq / (2 * pll_ref);
635 vco_fra = vco_freq - 2 * pll_ref * nint;
636
637 /* boundary spur prevention */
638 if (vco_fra < pll_ref / 64) {
639 vco_fra = 0;
640 } else if (vco_fra > pll_ref * 127 / 64) {
641 vco_fra = 0;
642 nint++;
643 } else if ((vco_fra > pll_ref * 127 / 128) && (vco_fra < pll_ref)) {
644 vco_fra = pll_ref * 127 / 128;
645 } else if ((vco_fra > pll_ref) && (vco_fra < pll_ref * 129 / 128)) {
646 vco_fra = pll_ref * 129 / 128;
647 }
648
649 ni = (nint - 13) / 4;
650 si = nint - 4 * ni - 13;
651
652 rc = r820t_write_reg(priv, 0x14, ni + (si << 6));
653 if (rc < 0)
654 return rc;
655
656 /* pw_sdm */
657 if (!vco_fra)
658 val = 0x08;
659 else
660 val = 0x00;
661
662 rc = r820t_write_reg_mask(priv, 0x12, val, 0x08);
663 if (rc < 0)
664 return rc;
665
666 /* sdm calculator */
667 while (vco_fra > 1) {
668 if (vco_fra > (2 * pll_ref / n_sdm)) {
669 sdm = sdm + 32768 / (n_sdm / 2);
670 vco_fra = vco_fra - 2 * pll_ref / n_sdm;
671 if (n_sdm >= 0x8000)
672 break;
673 }
674 n_sdm = n_sdm << 1;
675 }
676
677 tuner_dbg("freq %d kHz, pll ref %d%s, sdm=0x%04x\n",
678 freq, pll_ref, refdiv2 ? " / 2" : "", sdm);
679
680 rc = r820t_write_reg(priv, 0x16, sdm >> 8);
681 if (rc < 0)
682 return rc;
683 rc = r820t_write_reg(priv, 0x15, sdm & 0xff);
684 if (rc < 0)
685 return rc;
686
687 for (i = 0; i < 2; i++) {
688 usleep_range(sleep_time, sleep_time + 1000);
689
690 /* Check if PLL has locked */
691 rc = r820t_read(priv, 0x00, data, 3);
692 if (rc < 0)
693 return rc;
694 if (data[2] & 0x40)
695 break;
696
697 if (!i) {
698 /* Didn't lock. Increase VCO current */
699 rc = r820t_write_reg_mask(priv, 0x12, 0x60, 0xe0);
700 if (rc < 0)
701 return rc;
702 }
703 }
704
705 if (!(data[2] & 0x40)) {
706 priv->has_lock = false;
707 return 0;
708 }
709
710 priv->has_lock = true;
711 tuner_dbg("tuner has lock at frequency %d kHz\n", freq);
712
713 /* set pll autotune = 8kHz */
714 rc = r820t_write_reg_mask(priv, 0x1a, 0x08, 0x08);
715
716 return rc;
717 }
718
719 static int r820t_sysfreq_sel(struct r820t_priv *priv, u32 freq,
720 enum v4l2_tuner_type type,
721 v4l2_std_id std,
722 u32 delsys)
723 {
724 int rc;
725 u8 mixer_top, lna_top, cp_cur, div_buf_cur, lna_vth_l, mixer_vth_l;
726 u8 air_cable1_in, cable2_in, pre_dect, lna_discharge, filter_cur;
727
728 tuner_dbg("adjusting tuner parameters for the standard\n");
729
730 switch (delsys) {
731 case SYS_DVBT:
732 if ((freq == 506000000) || (freq == 666000000) ||
733 (freq == 818000000)) {
734 mixer_top = 0x14; /* mixer top:14 , top-1, low-discharge */
735 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
736 cp_cur = 0x28; /* 101, 0.2 */
737 div_buf_cur = 0x20; /* 10, 200u */
738 } else {
739 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
740 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
741 cp_cur = 0x38; /* 111, auto */
742 div_buf_cur = 0x30; /* 11, 150u */
743 }
744 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
745 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
746 air_cable1_in = 0x00;
747 cable2_in = 0x00;
748 pre_dect = 0x40;
749 lna_discharge = 14;
750 filter_cur = 0x40; /* 10, low */
751 break;
752 case SYS_DVBT2:
753 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
754 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
755 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
756 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
757 air_cable1_in = 0x00;
758 cable2_in = 0x00;
759 pre_dect = 0x40;
760 lna_discharge = 14;
761 cp_cur = 0x38; /* 111, auto */
762 div_buf_cur = 0x30; /* 11, 150u */
763 filter_cur = 0x40; /* 10, low */
764 break;
765 case SYS_ISDBT:
766 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
767 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
768 lna_vth_l = 0x75; /* lna vth 1.04 , vtl 0.84 */
769 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
770 air_cable1_in = 0x00;
771 cable2_in = 0x00;
772 pre_dect = 0x40;
773 lna_discharge = 14;
774 cp_cur = 0x38; /* 111, auto */
775 div_buf_cur = 0x30; /* 11, 150u */
776 filter_cur = 0x40; /* 10, low */
777 break;
778 case SYS_DVBC_ANNEX_A:
779 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
780 lna_top = 0xe5;
781 lna_vth_l = 0x62;
782 mixer_vth_l = 0x75;
783 air_cable1_in = 0x60;
784 cable2_in = 0x00;
785 pre_dect = 0x40;
786 lna_discharge = 14;
787 cp_cur = 0x38; /* 111, auto */
788 div_buf_cur = 0x30; /* 11, 150u */
789 filter_cur = 0x40; /* 10, low */
790 break;
791 default: /* DVB-T 8M */
792 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
793 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
794 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
795 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
796 air_cable1_in = 0x00;
797 cable2_in = 0x00;
798 pre_dect = 0x40;
799 lna_discharge = 14;
800 cp_cur = 0x38; /* 111, auto */
801 div_buf_cur = 0x30; /* 11, 150u */
802 filter_cur = 0x40; /* 10, low */
803 break;
804 }
805
806 if (priv->cfg->use_diplexer &&
807 ((priv->cfg->rafael_chip == CHIP_R820T) ||
808 (priv->cfg->rafael_chip == CHIP_R828S) ||
809 (priv->cfg->rafael_chip == CHIP_R820C))) {
810 if (freq > DIP_FREQ)
811 air_cable1_in = 0x00;
812 else
813 air_cable1_in = 0x60;
814 cable2_in = 0x00;
815 }
816
817
818 if (priv->cfg->use_predetect) {
819 rc = r820t_write_reg_mask(priv, 0x06, pre_dect, 0x40);
820 if (rc < 0)
821 return rc;
822 }
823
824 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7);
825 if (rc < 0)
826 return rc;
827 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0xf8);
828 if (rc < 0)
829 return rc;
830 rc = r820t_write_reg(priv, 0x0d, lna_vth_l);
831 if (rc < 0)
832 return rc;
833 rc = r820t_write_reg(priv, 0x0e, mixer_vth_l);
834 if (rc < 0)
835 return rc;
836
837 /* Air-IN only for Astrometa */
838 rc = r820t_write_reg_mask(priv, 0x05, air_cable1_in, 0x60);
839 if (rc < 0)
840 return rc;
841 rc = r820t_write_reg_mask(priv, 0x06, cable2_in, 0x08);
842 if (rc < 0)
843 return rc;
844
845 rc = r820t_write_reg_mask(priv, 0x11, cp_cur, 0x38);
846 if (rc < 0)
847 return rc;
848 rc = r820t_write_reg_mask(priv, 0x17, div_buf_cur, 0x30);
849 if (rc < 0)
850 return rc;
851 rc = r820t_write_reg_mask(priv, 0x0a, filter_cur, 0x60);
852 if (rc < 0)
853 return rc;
854 /*
855 * Original driver initializes regs 0x05 and 0x06 with the
856 * same value again on this point. Probably, it is just an
857 * error there
858 */
859
860 /*
861 * Set LNA
862 */
863
864 tuner_dbg("adjusting LNA parameters\n");
865 if (type != V4L2_TUNER_ANALOG_TV) {
866 /* LNA TOP: lowest */
867 rc = r820t_write_reg_mask(priv, 0x1d, 0, 0x38);
868 if (rc < 0)
869 return rc;
870
871 /* 0: normal mode */
872 rc = r820t_write_reg_mask(priv, 0x1c, 0, 0x04);
873 if (rc < 0)
874 return rc;
875
876 /* 0: PRE_DECT off */
877 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
878 if (rc < 0)
879 return rc;
880
881 /* agc clk 250hz */
882 rc = r820t_write_reg_mask(priv, 0x1a, 0x30, 0x30);
883 if (rc < 0)
884 return rc;
885
886 msleep(250);
887
888 /* write LNA TOP = 3 */
889 rc = r820t_write_reg_mask(priv, 0x1d, 0x18, 0x38);
890 if (rc < 0)
891 return rc;
892
893 /*
894 * write discharge mode
895 * FIXME: IMHO, the mask here is wrong, but it matches
896 * what's there at the original driver
897 */
898 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
899 if (rc < 0)
900 return rc;
901
902 /* LNA discharge current */
903 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
904 if (rc < 0)
905 return rc;
906
907 /* agc clk 60hz */
908 rc = r820t_write_reg_mask(priv, 0x1a, 0x20, 0x30);
909 if (rc < 0)
910 return rc;
911 } else {
912 /* PRE_DECT off */
913 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
914 if (rc < 0)
915 return rc;
916
917 /* write LNA TOP */
918 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0x38);
919 if (rc < 0)
920 return rc;
921
922 /*
923 * write discharge mode
924 * FIXME: IMHO, the mask here is wrong, but it matches
925 * what's there at the original driver
926 */
927 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
928 if (rc < 0)
929 return rc;
930
931 /* LNA discharge current */
932 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
933 if (rc < 0)
934 return rc;
935
936 /* agc clk 1Khz, external det1 cap 1u */
937 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x30);
938 if (rc < 0)
939 return rc;
940
941 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x04);
942 if (rc < 0)
943 return rc;
944 }
945 return 0;
946 }
947
948 static int r820t_set_tv_standard(struct r820t_priv *priv,
949 unsigned bw,
950 enum v4l2_tuner_type type,
951 v4l2_std_id std, u32 delsys)
952
953 {
954 int rc, i;
955 u32 if_khz, filt_cal_lo;
956 u8 data[5], val;
957 u8 filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through;
958 u8 lt_att, flt_ext_widest, polyfil_cur;
959 bool need_calibration;
960
961 tuner_dbg("selecting the delivery system\n");
962
963 if (delsys == SYS_ISDBT) {
964 if_khz = 4063;
965 filt_cal_lo = 59000;
966 filt_gain = 0x10; /* +3db, 6mhz on */
967 img_r = 0x00; /* image negative */
968 filt_q = 0x10; /* r10[4]:low q(1'b1) */
969 hp_cor = 0x6a; /* 1.7m disable, +2cap, 1.25mhz */
970 ext_enable = 0x40; /* r30[6], ext enable; r30[5]:0 ext at lna max */
971 loop_through = 0x00; /* r5[7], lt on */
972 lt_att = 0x00; /* r31[7], lt att enable */
973 flt_ext_widest = 0x80; /* r15[7]: flt_ext_wide on */
974 polyfil_cur = 0x60; /* r25[6:5]:min */
975 } else if (delsys == SYS_DVBC_ANNEX_A) {
976 if_khz = 5070;
977 filt_cal_lo = 73500;
978 filt_gain = 0x10; /* +3db, 6mhz on */
979 img_r = 0x00; /* image negative */
980 filt_q = 0x10; /* r10[4]:low q(1'b1) */
981 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */
982 ext_enable = 0x40; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
983 loop_through = 0x00; /* r5[7], lt on */
984 lt_att = 0x00; /* r31[7], lt att enable */
985 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
986 polyfil_cur = 0x60; /* r25[6:5]:min */
987 } else if (delsys == SYS_DVBC_ANNEX_C) {
988 if_khz = 4063;
989 filt_cal_lo = 55000;
990 filt_gain = 0x10; /* +3db, 6mhz on */
991 img_r = 0x00; /* image negative */
992 filt_q = 0x10; /* r10[4]:low q(1'b1) */
993 hp_cor = 0x6a; /* 1.7m disable, +0cap, 1.0mhz */
994 ext_enable = 0x40; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
995 loop_through = 0x00; /* r5[7], lt on */
996 lt_att = 0x00; /* r31[7], lt att enable */
997 flt_ext_widest = 0x80; /* r15[7]: flt_ext_wide on */
998 polyfil_cur = 0x60; /* r25[6:5]:min */
999 } else {
1000 if (bw <= 6) {
1001 if_khz = 3570;
1002 filt_cal_lo = 56000; /* 52000->56000 */
1003 filt_gain = 0x10; /* +3db, 6mhz on */
1004 img_r = 0x00; /* image negative */
1005 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1006 hp_cor = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */
1007 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1008 loop_through = 0x00; /* r5[7], lt on */
1009 lt_att = 0x00; /* r31[7], lt att enable */
1010 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1011 polyfil_cur = 0x60; /* r25[6:5]:min */
1012 } else if (bw == 7) {
1013 #if 0
1014 /*
1015 * There are two 7 MHz tables defined on the original
1016 * driver, but just the second one seems to be visible
1017 * by rtl2832. Keep this one here commented, as it
1018 * might be needed in the future
1019 */
1020
1021 if_khz = 4070;
1022 filt_cal_lo = 60000;
1023 filt_gain = 0x10; /* +3db, 6mhz on */
1024 img_r = 0x00; /* image negative */
1025 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1026 hp_cor = 0x2b; /* 1.7m disable, +1cap, 1.0mhz */
1027 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1028 loop_through = 0x00; /* r5[7], lt on */
1029 lt_att = 0x00; /* r31[7], lt att enable */
1030 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1031 polyfil_cur = 0x60; /* r25[6:5]:min */
1032 #endif
1033 /* 7 MHz, second table */
1034 if_khz = 4570;
1035 filt_cal_lo = 63000;
1036 filt_gain = 0x10; /* +3db, 6mhz on */
1037 img_r = 0x00; /* image negative */
1038 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1039 hp_cor = 0x2a; /* 1.7m disable, +1cap, 1.25mhz */
1040 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1041 loop_through = 0x00; /* r5[7], lt on */
1042 lt_att = 0x00; /* r31[7], lt att enable */
1043 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1044 polyfil_cur = 0x60; /* r25[6:5]:min */
1045 } else {
1046 if_khz = 4570;
1047 filt_cal_lo = 68500;
1048 filt_gain = 0x10; /* +3db, 6mhz on */
1049 img_r = 0x00; /* image negative */
1050 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1051 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */
1052 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1053 loop_through = 0x00; /* r5[7], lt on */
1054 lt_att = 0x00; /* r31[7], lt att enable */
1055 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1056 polyfil_cur = 0x60; /* r25[6:5]:min */
1057 }
1058 }
1059
1060 /* Initialize the shadow registers */
1061 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1062
1063 /* Init Flag & Xtal_check Result */
1064 if (priv->imr_done)
1065 val = 1 | priv->xtal_cap_sel << 1;
1066 else
1067 val = 0;
1068 rc = r820t_write_reg_mask(priv, 0x0c, val, 0x0f);
1069 if (rc < 0)
1070 return rc;
1071
1072 /* version */
1073 rc = r820t_write_reg_mask(priv, 0x13, VER_NUM, 0x3f);
1074 if (rc < 0)
1075 return rc;
1076
1077 /* for LT Gain test */
1078 if (type != V4L2_TUNER_ANALOG_TV) {
1079 rc = r820t_write_reg_mask(priv, 0x1d, 0x00, 0x38);
1080 if (rc < 0)
1081 return rc;
1082 usleep_range(1000, 2000);
1083 }
1084 priv->int_freq = if_khz * 1000;
1085
1086 /* Check if standard changed. If so, filter calibration is needed */
1087 if (type != priv->type)
1088 need_calibration = true;
1089 else if ((type == V4L2_TUNER_ANALOG_TV) && (std != priv->std))
1090 need_calibration = true;
1091 else if ((type == V4L2_TUNER_DIGITAL_TV) &&
1092 ((delsys != priv->delsys) || bw != priv->bw))
1093 need_calibration = true;
1094 else
1095 need_calibration = false;
1096
1097 if (need_calibration) {
1098 tuner_dbg("calibrating the tuner\n");
1099 for (i = 0; i < 2; i++) {
1100 /* Set filt_cap */
1101 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x60);
1102 if (rc < 0)
1103 return rc;
1104
1105 /* set cali clk =on */
1106 rc = r820t_write_reg_mask(priv, 0x0f, 0x04, 0x04);
1107 if (rc < 0)
1108 return rc;
1109
1110 /* X'tal cap 0pF for PLL */
1111 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x03);
1112 if (rc < 0)
1113 return rc;
1114
1115 rc = r820t_set_pll(priv, type, filt_cal_lo * 1000);
1116 if (rc < 0 || !priv->has_lock)
1117 return rc;
1118
1119 /* Start Trigger */
1120 rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10);
1121 if (rc < 0)
1122 return rc;
1123
1124 usleep_range(1000, 2000);
1125
1126 /* Stop Trigger */
1127 rc = r820t_write_reg_mask(priv, 0x0b, 0x00, 0x10);
1128 if (rc < 0)
1129 return rc;
1130
1131 /* set cali clk =off */
1132 rc = r820t_write_reg_mask(priv, 0x0f, 0x00, 0x04);
1133 if (rc < 0)
1134 return rc;
1135
1136 /* Check if calibration worked */
1137 rc = r820t_read(priv, 0x00, data, sizeof(data));
1138 if (rc < 0)
1139 return rc;
1140
1141 priv->fil_cal_code = data[4] & 0x0f;
1142 if (priv->fil_cal_code && priv->fil_cal_code != 0x0f)
1143 break;
1144 }
1145 /* narrowest */
1146 if (priv->fil_cal_code == 0x0f)
1147 priv->fil_cal_code = 0;
1148 }
1149
1150 rc = r820t_write_reg_mask(priv, 0x0a,
1151 filt_q | priv->fil_cal_code, 0x1f);
1152 if (rc < 0)
1153 return rc;
1154
1155 /* Set BW, Filter_gain, & HP corner */
1156 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0xef);
1157 if (rc < 0)
1158 return rc;
1159
1160
1161 /* Set Img_R */
1162 rc = r820t_write_reg_mask(priv, 0x07, img_r, 0x80);
1163 if (rc < 0)
1164 return rc;
1165
1166 /* Set filt_3dB, V6MHz */
1167 rc = r820t_write_reg_mask(priv, 0x06, filt_gain, 0x30);
1168 if (rc < 0)
1169 return rc;
1170
1171 /* channel filter extension */
1172 rc = r820t_write_reg_mask(priv, 0x1e, ext_enable, 0x60);
1173 if (rc < 0)
1174 return rc;
1175
1176 /* Loop through */
1177 rc = r820t_write_reg_mask(priv, 0x05, loop_through, 0x80);
1178 if (rc < 0)
1179 return rc;
1180
1181 /* Loop through attenuation */
1182 rc = r820t_write_reg_mask(priv, 0x1f, lt_att, 0x80);
1183 if (rc < 0)
1184 return rc;
1185
1186 /* filter extension widest */
1187 rc = r820t_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80);
1188 if (rc < 0)
1189 return rc;
1190
1191 /* RF poly filter current */
1192 rc = r820t_write_reg_mask(priv, 0x19, polyfil_cur, 0x60);
1193 if (rc < 0)
1194 return rc;
1195
1196 /* Store current standard. If it changes, re-calibrate the tuner */
1197 priv->delsys = delsys;
1198 priv->type = type;
1199 priv->std = std;
1200 priv->bw = bw;
1201
1202 return 0;
1203 }
1204
1205 static int r820t_read_gain(struct r820t_priv *priv)
1206 {
1207 u8 data[4];
1208 int rc;
1209
1210 rc = r820t_read(priv, 0x00, data, sizeof(data));
1211 if (rc < 0)
1212 return rc;
1213
1214 return ((data[3] & 0x08) << 1) + ((data[3] & 0xf0) >> 4);
1215 }
1216
1217 #if 0
1218 /* FIXME: This routine requires more testing */
1219 static int r820t_set_gain_mode(struct r820t_priv *priv,
1220 bool set_manual_gain,
1221 int gain)
1222 {
1223 int rc;
1224
1225 if (set_manual_gain) {
1226 int i, total_gain = 0;
1227 uint8_t mix_index = 0, lna_index = 0;
1228 u8 data[4];
1229
1230 /* LNA auto off */
1231 rc = r820t_write_reg_mask(priv, 0x05, 0x10, 0x10);
1232 if (rc < 0)
1233 return rc;
1234
1235 /* Mixer auto off */
1236 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1237 if (rc < 0)
1238 return rc;
1239
1240 rc = r820t_read(priv, 0x00, data, sizeof(data));
1241 if (rc < 0)
1242 return rc;
1243
1244 /* set fixed VGA gain for now (16.3 dB) */
1245 rc = r820t_write_reg_mask(priv, 0x0c, 0x08, 0x9f);
1246 if (rc < 0)
1247 return rc;
1248
1249 for (i = 0; i < 15; i++) {
1250 if (total_gain >= gain)
1251 break;
1252
1253 total_gain += r820t_lna_gain_steps[++lna_index];
1254
1255 if (total_gain >= gain)
1256 break;
1257
1258 total_gain += r820t_mixer_gain_steps[++mix_index];
1259 }
1260
1261 /* set LNA gain */
1262 rc = r820t_write_reg_mask(priv, 0x05, lna_index, 0x0f);
1263 if (rc < 0)
1264 return rc;
1265
1266 /* set Mixer gain */
1267 rc = r820t_write_reg_mask(priv, 0x07, mix_index, 0x0f);
1268 if (rc < 0)
1269 return rc;
1270 } else {
1271 /* LNA */
1272 rc = r820t_write_reg_mask(priv, 0x05, 0, 0x10);
1273 if (rc < 0)
1274 return rc;
1275
1276 /* Mixer */
1277 rc = r820t_write_reg_mask(priv, 0x07, 0x10, 0x10);
1278 if (rc < 0)
1279 return rc;
1280
1281 /* set fixed VGA gain for now (26.5 dB) */
1282 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1283 if (rc < 0)
1284 return rc;
1285 }
1286
1287 return 0;
1288 }
1289 #endif
1290
1291 static int generic_set_freq(struct dvb_frontend *fe,
1292 u32 freq /* in HZ */,
1293 unsigned bw,
1294 enum v4l2_tuner_type type,
1295 v4l2_std_id std, u32 delsys)
1296 {
1297 struct r820t_priv *priv = fe->tuner_priv;
1298 int rc;
1299 u32 lo_freq;
1300
1301 tuner_dbg("should set frequency to %d kHz, bw %d MHz\n",
1302 freq / 1000, bw);
1303
1304 rc = r820t_set_tv_standard(priv, bw, type, std, delsys);
1305 if (rc < 0)
1306 goto err;
1307
1308 if ((type == V4L2_TUNER_ANALOG_TV) && (std == V4L2_STD_SECAM_LC))
1309 lo_freq = freq - priv->int_freq;
1310 else
1311 lo_freq = freq + priv->int_freq;
1312
1313 rc = r820t_set_mux(priv, lo_freq);
1314 if (rc < 0)
1315 goto err;
1316
1317 rc = r820t_set_pll(priv, type, lo_freq);
1318 if (rc < 0 || !priv->has_lock)
1319 goto err;
1320
1321 rc = r820t_sysfreq_sel(priv, freq, type, std, delsys);
1322 if (rc < 0)
1323 goto err;
1324
1325 tuner_dbg("%s: PLL locked on frequency %d Hz, gain=%d\n",
1326 __func__, freq, r820t_read_gain(priv));
1327
1328 err:
1329
1330 if (rc < 0)
1331 tuner_dbg("%s: failed=%d\n", __func__, rc);
1332 return rc;
1333 }
1334
1335 /*
1336 * r820t standby logic
1337 */
1338
1339 static int r820t_standby(struct r820t_priv *priv)
1340 {
1341 int rc;
1342
1343 /* If device was not initialized yet, don't need to standby */
1344 if (!priv->init_done)
1345 return 0;
1346
1347 rc = r820t_write_reg(priv, 0x06, 0xb1);
1348 if (rc < 0)
1349 return rc;
1350 rc = r820t_write_reg(priv, 0x05, 0x03);
1351 if (rc < 0)
1352 return rc;
1353 rc = r820t_write_reg(priv, 0x07, 0x3a);
1354 if (rc < 0)
1355 return rc;
1356 rc = r820t_write_reg(priv, 0x08, 0x40);
1357 if (rc < 0)
1358 return rc;
1359 rc = r820t_write_reg(priv, 0x09, 0xc0);
1360 if (rc < 0)
1361 return rc;
1362 rc = r820t_write_reg(priv, 0x0a, 0x36);
1363 if (rc < 0)
1364 return rc;
1365 rc = r820t_write_reg(priv, 0x0c, 0x35);
1366 if (rc < 0)
1367 return rc;
1368 rc = r820t_write_reg(priv, 0x0f, 0x68);
1369 if (rc < 0)
1370 return rc;
1371 rc = r820t_write_reg(priv, 0x11, 0x03);
1372 if (rc < 0)
1373 return rc;
1374 rc = r820t_write_reg(priv, 0x17, 0xf4);
1375 if (rc < 0)
1376 return rc;
1377 rc = r820t_write_reg(priv, 0x19, 0x0c);
1378
1379 /* Force initial calibration */
1380 priv->type = -1;
1381
1382 return rc;
1383 }
1384
1385 /*
1386 * r820t device init logic
1387 */
1388
1389 static int r820t_xtal_check(struct r820t_priv *priv)
1390 {
1391 int rc, i;
1392 u8 data[3], val;
1393
1394 /* Initialize the shadow registers */
1395 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1396
1397 /* cap 30pF & Drive Low */
1398 rc = r820t_write_reg_mask(priv, 0x10, 0x0b, 0x0b);
1399 if (rc < 0)
1400 return rc;
1401
1402 /* set pll autotune = 128kHz */
1403 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
1404 if (rc < 0)
1405 return rc;
1406
1407 /* set manual initial reg = 111111; */
1408 rc = r820t_write_reg_mask(priv, 0x13, 0x7f, 0x7f);
1409 if (rc < 0)
1410 return rc;
1411
1412 /* set auto */
1413 rc = r820t_write_reg_mask(priv, 0x13, 0x00, 0x40);
1414 if (rc < 0)
1415 return rc;
1416
1417 /* Try several xtal capacitor alternatives */
1418 for (i = 0; i < ARRAY_SIZE(r820t_xtal_capacitor); i++) {
1419 rc = r820t_write_reg_mask(priv, 0x10,
1420 r820t_xtal_capacitor[i][0], 0x1b);
1421 if (rc < 0)
1422 return rc;
1423
1424 usleep_range(5000, 6000);
1425
1426 rc = r820t_read(priv, 0x00, data, sizeof(data));
1427 if (rc < 0)
1428 return rc;
1429 if (!(data[2] & 0x40))
1430 continue;
1431
1432 val = data[2] & 0x3f;
1433
1434 if (priv->cfg->xtal == 16000000 && (val > 29 || val < 23))
1435 break;
1436
1437 if (val != 0x3f)
1438 break;
1439 }
1440
1441 if (i == ARRAY_SIZE(r820t_xtal_capacitor))
1442 return -EINVAL;
1443
1444 return r820t_xtal_capacitor[i][1];
1445 }
1446
1447 static int r820t_imr_prepare(struct r820t_priv *priv)
1448 {
1449 int rc;
1450
1451 /* Initialize the shadow registers */
1452 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1453
1454 /* lna off (air-in off) */
1455 rc = r820t_write_reg_mask(priv, 0x05, 0x20, 0x20);
1456 if (rc < 0)
1457 return rc;
1458
1459 /* mixer gain mode = manual */
1460 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1461 if (rc < 0)
1462 return rc;
1463
1464 /* filter corner = lowest */
1465 rc = r820t_write_reg_mask(priv, 0x0a, 0x0f, 0x0f);
1466 if (rc < 0)
1467 return rc;
1468
1469 /* filter bw=+2cap, hp=5M */
1470 rc = r820t_write_reg_mask(priv, 0x0b, 0x60, 0x6f);
1471 if (rc < 0)
1472 return rc;
1473
1474 /* adc=on, vga code mode, gain = 26.5dB */
1475 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1476 if (rc < 0)
1477 return rc;
1478
1479 /* ring clk = on */
1480 rc = r820t_write_reg_mask(priv, 0x0f, 0, 0x08);
1481 if (rc < 0)
1482 return rc;
1483
1484 /* ring power = on */
1485 rc = r820t_write_reg_mask(priv, 0x18, 0x10, 0x10);
1486 if (rc < 0)
1487 return rc;
1488
1489 /* from ring = ring pll in */
1490 rc = r820t_write_reg_mask(priv, 0x1c, 0x02, 0x02);
1491 if (rc < 0)
1492 return rc;
1493
1494 /* sw_pdect = det3 */
1495 rc = r820t_write_reg_mask(priv, 0x1e, 0x80, 0x80);
1496 if (rc < 0)
1497 return rc;
1498
1499 /* Set filt_3dB */
1500 rc = r820t_write_reg_mask(priv, 0x06, 0x20, 0x20);
1501
1502 return rc;
1503 }
1504
1505 static int r820t_multi_read(struct r820t_priv *priv)
1506 {
1507 int rc, i;
1508 u16 sum = 0;
1509 u8 data[2], min = 255, max = 0;
1510
1511 usleep_range(5000, 6000);
1512
1513 for (i = 0; i < 6; i++) {
1514 rc = r820t_read(priv, 0x00, data, sizeof(data));
1515 if (rc < 0)
1516 return rc;
1517
1518 sum += data[1];
1519
1520 if (data[1] < min)
1521 min = data[1];
1522
1523 if (data[1] > max)
1524 max = data[1];
1525 }
1526 rc = sum - max - min;
1527
1528 return rc;
1529 }
1530
1531 static int r820t_imr_cross(struct r820t_priv *priv,
1532 struct r820t_sect_type iq_point[3],
1533 u8 *x_direct)
1534 {
1535 struct r820t_sect_type cross[5]; /* (0,0)(0,Q-1)(0,I-1)(Q-1,0)(I-1,0) */
1536 struct r820t_sect_type tmp;
1537 int i, rc;
1538 u8 reg08, reg09;
1539
1540 reg08 = r820t_read_cache_reg(priv, 8) & 0xc0;
1541 reg09 = r820t_read_cache_reg(priv, 9) & 0xc0;
1542
1543 tmp.gain_x = 0;
1544 tmp.phase_y = 0;
1545 tmp.value = 255;
1546
1547 for (i = 0; i < 5; i++) {
1548 switch (i) {
1549 case 0:
1550 cross[i].gain_x = reg08;
1551 cross[i].phase_y = reg09;
1552 break;
1553 case 1:
1554 cross[i].gain_x = reg08; /* 0 */
1555 cross[i].phase_y = reg09 + 1; /* Q-1 */
1556 break;
1557 case 2:
1558 cross[i].gain_x = reg08; /* 0 */
1559 cross[i].phase_y = (reg09 | 0x20) + 1; /* I-1 */
1560 break;
1561 case 3:
1562 cross[i].gain_x = reg08 + 1; /* Q-1 */
1563 cross[i].phase_y = reg09;
1564 break;
1565 default:
1566 cross[i].gain_x = (reg08 | 0x20) + 1; /* I-1 */
1567 cross[i].phase_y = reg09;
1568 }
1569
1570 rc = r820t_write_reg(priv, 0x08, cross[i].gain_x);
1571 if (rc < 0)
1572 return rc;
1573
1574 rc = r820t_write_reg(priv, 0x09, cross[i].phase_y);
1575 if (rc < 0)
1576 return rc;
1577
1578 rc = r820t_multi_read(priv);
1579 if (rc < 0)
1580 return rc;
1581
1582 cross[i].value = rc;
1583
1584 if (cross[i].value < tmp.value)
1585 tmp = cross[i];
1586 }
1587
1588 if ((tmp.phase_y & 0x1f) == 1) { /* y-direction */
1589 *x_direct = 0;
1590
1591 iq_point[0] = cross[0];
1592 iq_point[1] = cross[1];
1593 iq_point[2] = cross[2];
1594 } else { /* (0,0) or x-direction */
1595 *x_direct = 1;
1596
1597 iq_point[0] = cross[0];
1598 iq_point[1] = cross[3];
1599 iq_point[2] = cross[4];
1600 }
1601 return 0;
1602 }
1603
1604 static void r820t_compre_cor(struct r820t_sect_type iq[3])
1605 {
1606 int i;
1607
1608 for (i = 3; i > 0; i--) {
1609 if (iq[0].value > iq[i - 1].value)
1610 swap(iq[0], iq[i - 1]);
1611 }
1612 }
1613
1614 static int r820t_compre_step(struct r820t_priv *priv,
1615 struct r820t_sect_type iq[3], u8 reg)
1616 {
1617 int rc;
1618 struct r820t_sect_type tmp;
1619
1620 /*
1621 * Purpose: if (Gain<9 or Phase<9), Gain+1 or Phase+1 and compare
1622 * with min value:
1623 * new < min => update to min and continue
1624 * new > min => Exit
1625 */
1626
1627 /* min value already saved in iq[0] */
1628 tmp.phase_y = iq[0].phase_y;
1629 tmp.gain_x = iq[0].gain_x;
1630
1631 while (((tmp.gain_x & 0x1f) < IMR_TRIAL) &&
1632 ((tmp.phase_y & 0x1f) < IMR_TRIAL)) {
1633 if (reg == 0x08)
1634 tmp.gain_x++;
1635 else
1636 tmp.phase_y++;
1637
1638 rc = r820t_write_reg(priv, 0x08, tmp.gain_x);
1639 if (rc < 0)
1640 return rc;
1641
1642 rc = r820t_write_reg(priv, 0x09, tmp.phase_y);
1643 if (rc < 0)
1644 return rc;
1645
1646 rc = r820t_multi_read(priv);
1647 if (rc < 0)
1648 return rc;
1649 tmp.value = rc;
1650
1651 if (tmp.value <= iq[0].value) {
1652 iq[0].gain_x = tmp.gain_x;
1653 iq[0].phase_y = tmp.phase_y;
1654 iq[0].value = tmp.value;
1655 } else {
1656 return 0;
1657 }
1658
1659 }
1660
1661 return 0;
1662 }
1663
1664 static int r820t_iq_tree(struct r820t_priv *priv,
1665 struct r820t_sect_type iq[3],
1666 u8 fix_val, u8 var_val, u8 fix_reg)
1667 {
1668 int rc, i;
1669 u8 tmp, var_reg;
1670
1671 /*
1672 * record IMC results by input gain/phase location then adjust
1673 * gain or phase positive 1 step and negtive 1 step,
1674 * both record results
1675 */
1676
1677 if (fix_reg == 0x08)
1678 var_reg = 0x09;
1679 else
1680 var_reg = 0x08;
1681
1682 for (i = 0; i < 3; i++) {
1683 rc = r820t_write_reg(priv, fix_reg, fix_val);
1684 if (rc < 0)
1685 return rc;
1686
1687 rc = r820t_write_reg(priv, var_reg, var_val);
1688 if (rc < 0)
1689 return rc;
1690
1691 rc = r820t_multi_read(priv);
1692 if (rc < 0)
1693 return rc;
1694 iq[i].value = rc;
1695
1696 if (fix_reg == 0x08) {
1697 iq[i].gain_x = fix_val;
1698 iq[i].phase_y = var_val;
1699 } else {
1700 iq[i].phase_y = fix_val;
1701 iq[i].gain_x = var_val;
1702 }
1703
1704 if (i == 0) { /* try right-side point */
1705 var_val++;
1706 } else if (i == 1) { /* try left-side point */
1707 /* if absolute location is 1, change I/Q direction */
1708 if ((var_val & 0x1f) < 0x02) {
1709 tmp = 2 - (var_val & 0x1f);
1710
1711 /* b[5]:I/Q selection. 0:Q-path, 1:I-path */
1712 if (var_val & 0x20) {
1713 var_val &= 0xc0;
1714 var_val |= tmp;
1715 } else {
1716 var_val |= 0x20 | tmp;
1717 }
1718 } else {
1719 var_val -= 2;
1720 }
1721 }
1722 }
1723
1724 return 0;
1725 }
1726
1727 static int r820t_section(struct r820t_priv *priv,
1728 struct r820t_sect_type *iq_point)
1729 {
1730 int rc;
1731 struct r820t_sect_type compare_iq[3], compare_bet[3];
1732
1733 /* Try X-1 column and save min result to compare_bet[0] */
1734 if (!(iq_point->gain_x & 0x1f))
1735 compare_iq[0].gain_x = ((iq_point->gain_x) & 0xdf) + 1; /* Q-path, Gain=1 */
1736 else
1737 compare_iq[0].gain_x = iq_point->gain_x - 1; /* left point */
1738 compare_iq[0].phase_y = iq_point->phase_y;
1739
1740 /* y-direction */
1741 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1742 compare_iq[0].phase_y, 0x08);
1743 if (rc < 0)
1744 return rc;
1745
1746 r820t_compre_cor(compare_iq);
1747
1748 compare_bet[0] = compare_iq[0];
1749
1750 /* Try X column and save min result to compare_bet[1] */
1751 compare_iq[0].gain_x = iq_point->gain_x;
1752 compare_iq[0].phase_y = iq_point->phase_y;
1753
1754 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1755 compare_iq[0].phase_y, 0x08);
1756 if (rc < 0)
1757 return rc;
1758
1759 r820t_compre_cor(compare_iq);
1760
1761 compare_bet[1] = compare_iq[0];
1762
1763 /* Try X+1 column and save min result to compare_bet[2] */
1764 if ((iq_point->gain_x & 0x1f) == 0x00)
1765 compare_iq[0].gain_x = ((iq_point->gain_x) | 0x20) + 1; /* I-path, Gain=1 */
1766 else
1767 compare_iq[0].gain_x = iq_point->gain_x + 1;
1768 compare_iq[0].phase_y = iq_point->phase_y;
1769
1770 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1771 compare_iq[0].phase_y, 0x08);
1772 if (rc < 0)
1773 return rc;
1774
1775 r820t_compre_cor(compare_iq);
1776
1777 compare_bet[2] = compare_iq[0];
1778
1779 r820t_compre_cor(compare_bet);
1780
1781 *iq_point = compare_bet[0];
1782
1783 return 0;
1784 }
1785
1786 static int r820t_vga_adjust(struct r820t_priv *priv)
1787 {
1788 int rc;
1789 u8 vga_count;
1790
1791 /* increase vga power to let image significant */
1792 for (vga_count = 12; vga_count < 16; vga_count++) {
1793 rc = r820t_write_reg_mask(priv, 0x0c, vga_count, 0x0f);
1794 if (rc < 0)
1795 return rc;
1796
1797 usleep_range(10000, 11000);
1798
1799 rc = r820t_multi_read(priv);
1800 if (rc < 0)
1801 return rc;
1802
1803 if (rc > 40 * 4)
1804 break;
1805 }
1806
1807 return 0;
1808 }
1809
1810 static int r820t_iq(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1811 {
1812 struct r820t_sect_type compare_iq[3];
1813 int rc;
1814 u8 x_direction = 0; /* 1:x, 0:y */
1815 u8 dir_reg, other_reg;
1816
1817 r820t_vga_adjust(priv);
1818
1819 rc = r820t_imr_cross(priv, compare_iq, &x_direction);
1820 if (rc < 0)
1821 return rc;
1822
1823 if (x_direction == 1) {
1824 dir_reg = 0x08;
1825 other_reg = 0x09;
1826 } else {
1827 dir_reg = 0x09;
1828 other_reg = 0x08;
1829 }
1830
1831 /* compare and find min of 3 points. determine i/q direction */
1832 r820t_compre_cor(compare_iq);
1833
1834 /* increase step to find min value of this direction */
1835 rc = r820t_compre_step(priv, compare_iq, dir_reg);
1836 if (rc < 0)
1837 return rc;
1838
1839 /* the other direction */
1840 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1841 compare_iq[0].phase_y, dir_reg);
1842 if (rc < 0)
1843 return rc;
1844
1845 /* compare and find min of 3 points. determine i/q direction */
1846 r820t_compre_cor(compare_iq);
1847
1848 /* increase step to find min value on this direction */
1849 rc = r820t_compre_step(priv, compare_iq, other_reg);
1850 if (rc < 0)
1851 return rc;
1852
1853 /* check 3 points again */
1854 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1855 compare_iq[0].phase_y, other_reg);
1856 if (rc < 0)
1857 return rc;
1858
1859 r820t_compre_cor(compare_iq);
1860
1861 /* section-9 check */
1862 rc = r820t_section(priv, compare_iq);
1863
1864 *iq_pont = compare_iq[0];
1865
1866 /* reset gain/phase control setting */
1867 rc = r820t_write_reg_mask(priv, 0x08, 0, 0x3f);
1868 if (rc < 0)
1869 return rc;
1870
1871 rc = r820t_write_reg_mask(priv, 0x09, 0, 0x3f);
1872
1873 return rc;
1874 }
1875
1876 static int r820t_f_imr(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1877 {
1878 int rc;
1879
1880 r820t_vga_adjust(priv);
1881
1882 /*
1883 * search surrounding points from previous point
1884 * try (x-1), (x), (x+1) columns, and find min IMR result point
1885 */
1886 rc = r820t_section(priv, iq_pont);
1887 if (rc < 0)
1888 return rc;
1889
1890 return 0;
1891 }
1892
1893 static int r820t_imr(struct r820t_priv *priv, unsigned imr_mem, bool im_flag)
1894 {
1895 struct r820t_sect_type imr_point;
1896 int rc;
1897 u32 ring_vco, ring_freq, ring_ref;
1898 u8 n_ring, n;
1899 int reg18, reg19, reg1f;
1900
1901 if (priv->cfg->xtal > 24000000)
1902 ring_ref = priv->cfg->xtal / 2000;
1903 else
1904 ring_ref = priv->cfg->xtal / 1000;
1905
1906 n_ring = 15;
1907 for (n = 0; n < 16; n++) {
1908 if ((16 + n) * 8 * ring_ref >= 3100000) {
1909 n_ring = n;
1910 break;
1911 }
1912 }
1913
1914 reg18 = r820t_read_cache_reg(priv, 0x18);
1915 reg19 = r820t_read_cache_reg(priv, 0x19);
1916 reg1f = r820t_read_cache_reg(priv, 0x1f);
1917
1918 reg18 &= 0xf0; /* set ring[3:0] */
1919 reg18 |= n_ring;
1920
1921 ring_vco = (16 + n_ring) * 8 * ring_ref;
1922
1923 reg18 &= 0xdf; /* clear ring_se23 */
1924 reg19 &= 0xfc; /* clear ring_seldiv */
1925 reg1f &= 0xfc; /* clear ring_att */
1926
1927 switch (imr_mem) {
1928 case 0:
1929 ring_freq = ring_vco / 48;
1930 reg18 |= 0x20; /* ring_se23 = 1 */
1931 reg19 |= 0x03; /* ring_seldiv = 3 */
1932 reg1f |= 0x02; /* ring_att 10 */
1933 break;
1934 case 1:
1935 ring_freq = ring_vco / 16;
1936 reg18 |= 0x00; /* ring_se23 = 0 */
1937 reg19 |= 0x02; /* ring_seldiv = 2 */
1938 reg1f |= 0x00; /* pw_ring 00 */
1939 break;
1940 case 2:
1941 ring_freq = ring_vco / 8;
1942 reg18 |= 0x00; /* ring_se23 = 0 */
1943 reg19 |= 0x01; /* ring_seldiv = 1 */
1944 reg1f |= 0x03; /* pw_ring 11 */
1945 break;
1946 case 3:
1947 ring_freq = ring_vco / 6;
1948 reg18 |= 0x20; /* ring_se23 = 1 */
1949 reg19 |= 0x00; /* ring_seldiv = 0 */
1950 reg1f |= 0x03; /* pw_ring 11 */
1951 break;
1952 case 4:
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 default:
1959 ring_freq = ring_vco / 4;
1960 reg18 |= 0x00; /* ring_se23 = 0 */
1961 reg19 |= 0x00; /* ring_seldiv = 0 */
1962 reg1f |= 0x01; /* pw_ring 01 */
1963 break;
1964 }
1965
1966
1967 /* write pw_ring, n_ring, ringdiv2 registers */
1968
1969 /* n_ring, ring_se23 */
1970 rc = r820t_write_reg(priv, 0x18, reg18);
1971 if (rc < 0)
1972 return rc;
1973
1974 /* ring_sediv */
1975 rc = r820t_write_reg(priv, 0x19, reg19);
1976 if (rc < 0)
1977 return rc;
1978
1979 /* pw_ring */
1980 rc = r820t_write_reg(priv, 0x1f, reg1f);
1981 if (rc < 0)
1982 return rc;
1983
1984 /* mux input freq ~ rf_in freq */
1985 rc = r820t_set_mux(priv, (ring_freq - 5300) * 1000);
1986 if (rc < 0)
1987 return rc;
1988
1989 rc = r820t_set_pll(priv, V4L2_TUNER_DIGITAL_TV,
1990 (ring_freq - 5300) * 1000);
1991 if (!priv->has_lock)
1992 rc = -EINVAL;
1993 if (rc < 0)
1994 return rc;
1995
1996 if (im_flag) {
1997 rc = r820t_iq(priv, &imr_point);
1998 } else {
1999 imr_point.gain_x = priv->imr_data[3].gain_x;
2000 imr_point.phase_y = priv->imr_data[3].phase_y;
2001 imr_point.value = priv->imr_data[3].value;
2002
2003 rc = r820t_f_imr(priv, &imr_point);
2004 }
2005 if (rc < 0)
2006 return rc;
2007
2008 /* save IMR value */
2009 switch (imr_mem) {
2010 case 0:
2011 priv->imr_data[0].gain_x = imr_point.gain_x;
2012 priv->imr_data[0].phase_y = imr_point.phase_y;
2013 priv->imr_data[0].value = imr_point.value;
2014 break;
2015 case 1:
2016 priv->imr_data[1].gain_x = imr_point.gain_x;
2017 priv->imr_data[1].phase_y = imr_point.phase_y;
2018 priv->imr_data[1].value = imr_point.value;
2019 break;
2020 case 2:
2021 priv->imr_data[2].gain_x = imr_point.gain_x;
2022 priv->imr_data[2].phase_y = imr_point.phase_y;
2023 priv->imr_data[2].value = imr_point.value;
2024 break;
2025 case 3:
2026 priv->imr_data[3].gain_x = imr_point.gain_x;
2027 priv->imr_data[3].phase_y = imr_point.phase_y;
2028 priv->imr_data[3].value = imr_point.value;
2029 break;
2030 case 4:
2031 priv->imr_data[4].gain_x = imr_point.gain_x;
2032 priv->imr_data[4].phase_y = imr_point.phase_y;
2033 priv->imr_data[4].value = imr_point.value;
2034 break;
2035 default:
2036 priv->imr_data[4].gain_x = imr_point.gain_x;
2037 priv->imr_data[4].phase_y = imr_point.phase_y;
2038 priv->imr_data[4].value = imr_point.value;
2039 break;
2040 }
2041
2042 return 0;
2043 }
2044
2045 static int r820t_imr_callibrate(struct r820t_priv *priv)
2046 {
2047 int rc, i;
2048 int xtal_cap = 0;
2049
2050 if (priv->init_done)
2051 return 0;
2052
2053 /* Detect Xtal capacitance */
2054 if ((priv->cfg->rafael_chip == CHIP_R820T) ||
2055 (priv->cfg->rafael_chip == CHIP_R828S) ||
2056 (priv->cfg->rafael_chip == CHIP_R820C)) {
2057 priv->xtal_cap_sel = XTAL_HIGH_CAP_0P;
2058 } else {
2059 /* Initialize registers */
2060 rc = r820t_write(priv, 0x05,
2061 r820t_init_array, sizeof(r820t_init_array));
2062 if (rc < 0)
2063 return rc;
2064 for (i = 0; i < 3; i++) {
2065 rc = r820t_xtal_check(priv);
2066 if (rc < 0)
2067 return rc;
2068 if (!i || rc > xtal_cap)
2069 xtal_cap = rc;
2070 }
2071 priv->xtal_cap_sel = xtal_cap;
2072 }
2073
2074 /*
2075 * Disables IMR callibration. That emulates the same behaviour
2076 * as what is done by rtl-sdr userspace library. Useful for testing
2077 */
2078 if (no_imr_cal) {
2079 priv->init_done = true;
2080
2081 return 0;
2082 }
2083
2084 /* Initialize registers */
2085 rc = r820t_write(priv, 0x05,
2086 r820t_init_array, sizeof(r820t_init_array));
2087 if (rc < 0)
2088 return rc;
2089
2090 rc = r820t_imr_prepare(priv);
2091 if (rc < 0)
2092 return rc;
2093
2094 rc = r820t_imr(priv, 3, true);
2095 if (rc < 0)
2096 return rc;
2097 rc = r820t_imr(priv, 1, false);
2098 if (rc < 0)
2099 return rc;
2100 rc = r820t_imr(priv, 0, false);
2101 if (rc < 0)
2102 return rc;
2103 rc = r820t_imr(priv, 2, false);
2104 if (rc < 0)
2105 return rc;
2106 rc = r820t_imr(priv, 4, false);
2107 if (rc < 0)
2108 return rc;
2109
2110 priv->init_done = true;
2111 priv->imr_done = true;
2112
2113 return 0;
2114 }
2115
2116 #if 0
2117 /* Not used, for now */
2118 static int r820t_gpio(struct r820t_priv *priv, bool enable)
2119 {
2120 return r820t_write_reg_mask(priv, 0x0f, enable ? 1 : 0, 0x01);
2121 }
2122 #endif
2123
2124 /*
2125 * r820t frontend operations and tuner attach code
2126 *
2127 * All driver locks and i2c control are only in this part of the code
2128 */
2129
2130 static int r820t_init(struct dvb_frontend *fe)
2131 {
2132 struct r820t_priv *priv = fe->tuner_priv;
2133 int rc;
2134
2135 tuner_dbg("%s:\n", __func__);
2136
2137 mutex_lock(&priv->lock);
2138 if (fe->ops.i2c_gate_ctrl)
2139 fe->ops.i2c_gate_ctrl(fe, 1);
2140
2141 rc = r820t_imr_callibrate(priv);
2142 if (rc < 0)
2143 goto err;
2144
2145 /* Initialize registers */
2146 rc = r820t_write(priv, 0x05,
2147 r820t_init_array, sizeof(r820t_init_array));
2148
2149 err:
2150 if (fe->ops.i2c_gate_ctrl)
2151 fe->ops.i2c_gate_ctrl(fe, 0);
2152 mutex_unlock(&priv->lock);
2153
2154 if (rc < 0)
2155 tuner_dbg("%s: failed=%d\n", __func__, rc);
2156 return rc;
2157 }
2158
2159 static int r820t_sleep(struct dvb_frontend *fe)
2160 {
2161 struct r820t_priv *priv = fe->tuner_priv;
2162 int rc;
2163
2164 tuner_dbg("%s:\n", __func__);
2165
2166 mutex_lock(&priv->lock);
2167 if (fe->ops.i2c_gate_ctrl)
2168 fe->ops.i2c_gate_ctrl(fe, 1);
2169
2170 rc = r820t_standby(priv);
2171
2172 if (fe->ops.i2c_gate_ctrl)
2173 fe->ops.i2c_gate_ctrl(fe, 0);
2174 mutex_unlock(&priv->lock);
2175
2176 tuner_dbg("%s: failed=%d\n", __func__, rc);
2177 return rc;
2178 }
2179
2180 static int r820t_set_analog_freq(struct dvb_frontend *fe,
2181 struct analog_parameters *p)
2182 {
2183 struct r820t_priv *priv = fe->tuner_priv;
2184 unsigned bw;
2185 int rc;
2186
2187 tuner_dbg("%s called\n", __func__);
2188
2189 /* if std is not defined, choose one */
2190 if (!p->std)
2191 p->std = V4L2_STD_MN;
2192
2193 if ((p->std == V4L2_STD_PAL_M) || (p->std == V4L2_STD_NTSC))
2194 bw = 6;
2195 else
2196 bw = 8;
2197
2198 mutex_lock(&priv->lock);
2199 if (fe->ops.i2c_gate_ctrl)
2200 fe->ops.i2c_gate_ctrl(fe, 1);
2201
2202 rc = generic_set_freq(fe, 62500l * p->frequency, bw,
2203 V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED);
2204
2205 if (fe->ops.i2c_gate_ctrl)
2206 fe->ops.i2c_gate_ctrl(fe, 0);
2207 mutex_unlock(&priv->lock);
2208
2209 return rc;
2210 }
2211
2212 static int r820t_set_params(struct dvb_frontend *fe)
2213 {
2214 struct r820t_priv *priv = fe->tuner_priv;
2215 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2216 int rc;
2217 unsigned bw;
2218
2219 tuner_dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
2220 __func__, c->delivery_system, c->frequency, c->bandwidth_hz);
2221
2222 mutex_lock(&priv->lock);
2223 if (fe->ops.i2c_gate_ctrl)
2224 fe->ops.i2c_gate_ctrl(fe, 1);
2225
2226 bw = (c->bandwidth_hz + 500000) / 1000000;
2227 if (!bw)
2228 bw = 8;
2229
2230 rc = generic_set_freq(fe, c->frequency, bw,
2231 V4L2_TUNER_DIGITAL_TV, 0, c->delivery_system);
2232
2233 if (fe->ops.i2c_gate_ctrl)
2234 fe->ops.i2c_gate_ctrl(fe, 0);
2235 mutex_unlock(&priv->lock);
2236
2237 if (rc)
2238 tuner_dbg("%s: failed=%d\n", __func__, rc);
2239 return rc;
2240 }
2241
2242 static int r820t_signal(struct dvb_frontend *fe, u16 *strength)
2243 {
2244 struct r820t_priv *priv = fe->tuner_priv;
2245 int rc = 0;
2246
2247 mutex_lock(&priv->lock);
2248 if (fe->ops.i2c_gate_ctrl)
2249 fe->ops.i2c_gate_ctrl(fe, 1);
2250
2251 if (priv->has_lock) {
2252 rc = r820t_read_gain(priv);
2253 if (rc < 0)
2254 goto err;
2255
2256 /* A higher gain at LNA means a lower signal strength */
2257 *strength = (45 - rc) << 4 | 0xff;
2258 if (*strength == 0xff)
2259 *strength = 0;
2260 } else {
2261 *strength = 0;
2262 }
2263
2264 err:
2265 if (fe->ops.i2c_gate_ctrl)
2266 fe->ops.i2c_gate_ctrl(fe, 0);
2267 mutex_unlock(&priv->lock);
2268
2269 tuner_dbg("%s: %s, gain=%d strength=%d\n",
2270 __func__,
2271 priv->has_lock ? "PLL locked" : "no signal",
2272 rc, *strength);
2273
2274 return 0;
2275 }
2276
2277 static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
2278 {
2279 struct r820t_priv *priv = fe->tuner_priv;
2280
2281 tuner_dbg("%s:\n", __func__);
2282
2283 *frequency = priv->int_freq;
2284
2285 return 0;
2286 }
2287
2288 static int r820t_release(struct dvb_frontend *fe)
2289 {
2290 struct r820t_priv *priv = fe->tuner_priv;
2291
2292 tuner_dbg("%s:\n", __func__);
2293
2294 mutex_lock(&r820t_list_mutex);
2295
2296 if (priv)
2297 hybrid_tuner_release_state(priv);
2298
2299 mutex_unlock(&r820t_list_mutex);
2300
2301 fe->tuner_priv = NULL;
2302
2303 return 0;
2304 }
2305
2306 static const struct dvb_tuner_ops r820t_tuner_ops = {
2307 .info = {
2308 .name = "Rafael Micro R820T",
2309 .frequency_min = 42000000,
2310 .frequency_max = 1002000000,
2311 },
2312 .init = r820t_init,
2313 .release = r820t_release,
2314 .sleep = r820t_sleep,
2315 .set_params = r820t_set_params,
2316 .set_analog_params = r820t_set_analog_freq,
2317 .get_if_frequency = r820t_get_if_frequency,
2318 .get_rf_strength = r820t_signal,
2319 };
2320
2321 struct dvb_frontend *r820t_attach(struct dvb_frontend *fe,
2322 struct i2c_adapter *i2c,
2323 const struct r820t_config *cfg)
2324 {
2325 struct r820t_priv *priv;
2326 int rc = -ENODEV;
2327 u8 data[5];
2328 int instance;
2329
2330 mutex_lock(&r820t_list_mutex);
2331
2332 instance = hybrid_tuner_request_state(struct r820t_priv, priv,
2333 hybrid_tuner_instance_list,
2334 i2c, cfg->i2c_addr,
2335 "r820t");
2336 switch (instance) {
2337 case 0:
2338 /* memory allocation failure */
2339 goto err_no_gate;
2340 case 1:
2341 /* new tuner instance */
2342 priv->cfg = cfg;
2343
2344 mutex_init(&priv->lock);
2345
2346 fe->tuner_priv = priv;
2347 break;
2348 case 2:
2349 /* existing tuner instance */
2350 fe->tuner_priv = priv;
2351 break;
2352 }
2353
2354 if (fe->ops.i2c_gate_ctrl)
2355 fe->ops.i2c_gate_ctrl(fe, 1);
2356
2357 /* check if the tuner is there */
2358 rc = r820t_read(priv, 0x00, data, sizeof(data));
2359 if (rc < 0)
2360 goto err;
2361
2362 rc = r820t_sleep(fe);
2363 if (rc < 0)
2364 goto err;
2365
2366 tuner_info("Rafael Micro r820t successfully identified\n");
2367
2368 if (fe->ops.i2c_gate_ctrl)
2369 fe->ops.i2c_gate_ctrl(fe, 0);
2370
2371 mutex_unlock(&r820t_list_mutex);
2372
2373 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops,
2374 sizeof(struct dvb_tuner_ops));
2375
2376 return fe;
2377 err:
2378 if (fe->ops.i2c_gate_ctrl)
2379 fe->ops.i2c_gate_ctrl(fe, 0);
2380
2381 err_no_gate:
2382 mutex_unlock(&r820t_list_mutex);
2383
2384 tuner_info("%s: failed=%d\n", __func__, rc);
2385 r820t_release(fe);
2386 return NULL;
2387 }
2388 EXPORT_SYMBOL_GPL(r820t_attach);
2389
2390 MODULE_DESCRIPTION("Rafael Micro r820t silicon tuner driver");
2391 MODULE_AUTHOR("Mauro Carvalho Chehab");
2392 MODULE_LICENSE("GPL");
Linux with added FPC-III support