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Merge tag 'gpio-v3.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[linux-2.6.git] / drivers / media / tuners / r820t.c
blobd9ee43fae62dee4f7f5cf474d4f74ed21e4c5a01
1 /*
2 * Rafael Micro R820T driver
3 *
4 * Copyright (C) 2013 Mauro Carvalho Chehab <mchehab@redhat.com>
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 default: /* DVB-T 8M */
779 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
780 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
781 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
782 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
783 air_cable1_in = 0x00;
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 }
792
793 if (priv->cfg->use_diplexer &&
794 ((priv->cfg->rafael_chip == CHIP_R820T) ||
795 (priv->cfg->rafael_chip == CHIP_R828S) ||
796 (priv->cfg->rafael_chip == CHIP_R820C))) {
797 if (freq > DIP_FREQ)
798 air_cable1_in = 0x00;
799 else
800 air_cable1_in = 0x60;
801 cable2_in = 0x00;
802 }
803
804
805 if (priv->cfg->use_predetect) {
806 rc = r820t_write_reg_mask(priv, 0x06, pre_dect, 0x40);
807 if (rc < 0)
808 return rc;
809 }
810
811 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7);
812 if (rc < 0)
813 return rc;
814 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0xf8);
815 if (rc < 0)
816 return rc;
817 rc = r820t_write_reg(priv, 0x0d, lna_vth_l);
818 if (rc < 0)
819 return rc;
820 rc = r820t_write_reg(priv, 0x0e, mixer_vth_l);
821 if (rc < 0)
822 return rc;
823
824 /* Air-IN only for Astrometa */
825 rc = r820t_write_reg_mask(priv, 0x05, air_cable1_in, 0x60);
826 if (rc < 0)
827 return rc;
828 rc = r820t_write_reg_mask(priv, 0x06, cable2_in, 0x08);
829 if (rc < 0)
830 return rc;
831
832 rc = r820t_write_reg_mask(priv, 0x11, cp_cur, 0x38);
833 if (rc < 0)
834 return rc;
835 rc = r820t_write_reg_mask(priv, 0x17, div_buf_cur, 0x30);
836 if (rc < 0)
837 return rc;
838 rc = r820t_write_reg_mask(priv, 0x0a, filter_cur, 0x60);
839 if (rc < 0)
840 return rc;
841 /*
842 * Original driver initializes regs 0x05 and 0x06 with the
843 * same value again on this point. Probably, it is just an
844 * error there
845 */
846
847 /*
848 * Set LNA
849 */
850
851 tuner_dbg("adjusting LNA parameters\n");
852 if (type != V4L2_TUNER_ANALOG_TV) {
853 /* LNA TOP: lowest */
854 rc = r820t_write_reg_mask(priv, 0x1d, 0, 0x38);
855 if (rc < 0)
856 return rc;
857
858 /* 0: normal mode */
859 rc = r820t_write_reg_mask(priv, 0x1c, 0, 0x04);
860 if (rc < 0)
861 return rc;
862
863 /* 0: PRE_DECT off */
864 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
865 if (rc < 0)
866 return rc;
867
868 /* agc clk 250hz */
869 rc = r820t_write_reg_mask(priv, 0x1a, 0x30, 0x30);
870 if (rc < 0)
871 return rc;
872
873 msleep(250);
874
875 /* write LNA TOP = 3 */
876 rc = r820t_write_reg_mask(priv, 0x1d, 0x18, 0x38);
877 if (rc < 0)
878 return rc;
879
880 /*
881 * write discharge mode
882 * FIXME: IMHO, the mask here is wrong, but it matches
883 * what's there at the original driver
884 */
885 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
886 if (rc < 0)
887 return rc;
888
889 /* LNA discharge current */
890 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
891 if (rc < 0)
892 return rc;
893
894 /* agc clk 60hz */
895 rc = r820t_write_reg_mask(priv, 0x1a, 0x20, 0x30);
896 if (rc < 0)
897 return rc;
898 } else {
899 /* PRE_DECT off */
900 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
901 if (rc < 0)
902 return rc;
903
904 /* write LNA TOP */
905 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0x38);
906 if (rc < 0)
907 return rc;
908
909 /*
910 * write discharge mode
911 * FIXME: IMHO, the mask here is wrong, but it matches
912 * what's there at the original driver
913 */
914 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
915 if (rc < 0)
916 return rc;
917
918 /* LNA discharge current */
919 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
920 if (rc < 0)
921 return rc;
922
923 /* agc clk 1Khz, external det1 cap 1u */
924 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x30);
925 if (rc < 0)
926 return rc;
927
928 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x04);
929 if (rc < 0)
930 return rc;
931 }
932 return 0;
933 }
934
935 static int r820t_set_tv_standard(struct r820t_priv *priv,
936 unsigned bw,
937 enum v4l2_tuner_type type,
938 v4l2_std_id std, u32 delsys)
939
940 {
941 int rc, i;
942 u32 if_khz, filt_cal_lo;
943 u8 data[5], val;
944 u8 filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through;
945 u8 lt_att, flt_ext_widest, polyfil_cur;
946 bool need_calibration;
947
948 tuner_dbg("selecting the delivery system\n");
949
950 if (delsys == SYS_ISDBT) {
951 if_khz = 4063;
952 filt_cal_lo = 59000;
953 filt_gain = 0x10; /* +3db, 6mhz on */
954 img_r = 0x00; /* image negative */
955 filt_q = 0x10; /* r10[4]:low q(1'b1) */
956 hp_cor = 0x6a; /* 1.7m disable, +2cap, 1.25mhz */
957 ext_enable = 0x40; /* r30[6], ext enable; r30[5]:0 ext at lna max */
958 loop_through = 0x00; /* r5[7], lt on */
959 lt_att = 0x00; /* r31[7], lt att enable */
960 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
961 polyfil_cur = 0x60; /* r25[6:5]:min */
962 } else {
963 if (bw <= 6) {
964 if_khz = 3570;
965 filt_cal_lo = 56000; /* 52000->56000 */
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 = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */
970 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
971 loop_through = 0x00; /* r5[7], lt on */
972 lt_att = 0x00; /* r31[7], lt att enable */
973 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
974 polyfil_cur = 0x60; /* r25[6:5]:min */
975 } else if (bw == 7) {
976 #if 0
977 /*
978 * There are two 7 MHz tables defined on the original
979 * driver, but just the second one seems to be visible
980 * by rtl2832. Keep this one here commented, as it
981 * might be needed in the future
982 */
983
984 if_khz = 4070;
985 filt_cal_lo = 60000;
986 filt_gain = 0x10; /* +3db, 6mhz on */
987 img_r = 0x00; /* image negative */
988 filt_q = 0x10; /* r10[4]:low q(1'b1) */
989 hp_cor = 0x2b; /* 1.7m disable, +1cap, 1.0mhz */
990 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
991 loop_through = 0x00; /* r5[7], lt on */
992 lt_att = 0x00; /* r31[7], lt att enable */
993 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
994 polyfil_cur = 0x60; /* r25[6:5]:min */
995 #endif
996 /* 7 MHz, second table */
997 if_khz = 4570;
998 filt_cal_lo = 63000;
999 filt_gain = 0x10; /* +3db, 6mhz on */
1000 img_r = 0x00; /* image negative */
1001 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1002 hp_cor = 0x2a; /* 1.7m disable, +1cap, 1.25mhz */
1003 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1004 loop_through = 0x00; /* r5[7], lt on */
1005 lt_att = 0x00; /* r31[7], lt att enable */
1006 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1007 polyfil_cur = 0x60; /* r25[6:5]:min */
1008 } else {
1009 if_khz = 4570;
1010 filt_cal_lo = 68500;
1011 filt_gain = 0x10; /* +3db, 6mhz on */
1012 img_r = 0x00; /* image negative */
1013 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1014 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */
1015 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1016 loop_through = 0x00; /* r5[7], lt on */
1017 lt_att = 0x00; /* r31[7], lt att enable */
1018 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1019 polyfil_cur = 0x60; /* r25[6:5]:min */
1020 }
1021 }
1022
1023 /* Initialize the shadow registers */
1024 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1025
1026 /* Init Flag & Xtal_check Result */
1027 if (priv->imr_done)
1028 val = 1 | priv->xtal_cap_sel << 1;
1029 else
1030 val = 0;
1031 rc = r820t_write_reg_mask(priv, 0x0c, val, 0x0f);
1032 if (rc < 0)
1033 return rc;
1034
1035 /* version */
1036 rc = r820t_write_reg_mask(priv, 0x13, VER_NUM, 0x3f);
1037 if (rc < 0)
1038 return rc;
1039
1040 /* for LT Gain test */
1041 if (type != V4L2_TUNER_ANALOG_TV) {
1042 rc = r820t_write_reg_mask(priv, 0x1d, 0x00, 0x38);
1043 if (rc < 0)
1044 return rc;
1045 usleep_range(1000, 2000);
1046 }
1047 priv->int_freq = if_khz * 1000;
1048
1049 /* Check if standard changed. If so, filter calibration is needed */
1050 if (type != priv->type)
1051 need_calibration = true;
1052 else if ((type == V4L2_TUNER_ANALOG_TV) && (std != priv->std))
1053 need_calibration = true;
1054 else if ((type == V4L2_TUNER_DIGITAL_TV) &&
1055 ((delsys != priv->delsys) || bw != priv->bw))
1056 need_calibration = true;
1057 else
1058 need_calibration = false;
1059
1060 if (need_calibration) {
1061 tuner_dbg("calibrating the tuner\n");
1062 for (i = 0; i < 2; i++) {
1063 /* Set filt_cap */
1064 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x60);
1065 if (rc < 0)
1066 return rc;
1067
1068 /* set cali clk =on */
1069 rc = r820t_write_reg_mask(priv, 0x0f, 0x04, 0x04);
1070 if (rc < 0)
1071 return rc;
1072
1073 /* X'tal cap 0pF for PLL */
1074 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x03);
1075 if (rc < 0)
1076 return rc;
1077
1078 rc = r820t_set_pll(priv, type, filt_cal_lo * 1000);
1079 if (rc < 0 || !priv->has_lock)
1080 return rc;
1081
1082 /* Start Trigger */
1083 rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10);
1084 if (rc < 0)
1085 return rc;
1086
1087 usleep_range(1000, 2000);
1088
1089 /* Stop Trigger */
1090 rc = r820t_write_reg_mask(priv, 0x0b, 0x00, 0x10);
1091 if (rc < 0)
1092 return rc;
1093
1094 /* set cali clk =off */
1095 rc = r820t_write_reg_mask(priv, 0x0f, 0x00, 0x04);
1096 if (rc < 0)
1097 return rc;
1098
1099 /* Check if calibration worked */
1100 rc = r820t_read(priv, 0x00, data, sizeof(data));
1101 if (rc < 0)
1102 return rc;
1103
1104 priv->fil_cal_code = data[4] & 0x0f;
1105 if (priv->fil_cal_code && priv->fil_cal_code != 0x0f)
1106 break;
1107 }
1108 /* narrowest */
1109 if (priv->fil_cal_code == 0x0f)
1110 priv->fil_cal_code = 0;
1111 }
1112
1113 rc = r820t_write_reg_mask(priv, 0x0a,
1114 filt_q | priv->fil_cal_code, 0x1f);
1115 if (rc < 0)
1116 return rc;
1117
1118 /* Set BW, Filter_gain, & HP corner */
1119 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0xef);
1120 if (rc < 0)
1121 return rc;
1122
1123
1124 /* Set Img_R */
1125 rc = r820t_write_reg_mask(priv, 0x07, img_r, 0x80);
1126 if (rc < 0)
1127 return rc;
1128
1129 /* Set filt_3dB, V6MHz */
1130 rc = r820t_write_reg_mask(priv, 0x06, filt_gain, 0x30);
1131 if (rc < 0)
1132 return rc;
1133
1134 /* channel filter extension */
1135 rc = r820t_write_reg_mask(priv, 0x1e, ext_enable, 0x60);
1136 if (rc < 0)
1137 return rc;
1138
1139 /* Loop through */
1140 rc = r820t_write_reg_mask(priv, 0x05, loop_through, 0x80);
1141 if (rc < 0)
1142 return rc;
1143
1144 /* Loop through attenuation */
1145 rc = r820t_write_reg_mask(priv, 0x1f, lt_att, 0x80);
1146 if (rc < 0)
1147 return rc;
1148
1149 /* filter extension widest */
1150 rc = r820t_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80);
1151 if (rc < 0)
1152 return rc;
1153
1154 /* RF poly filter current */
1155 rc = r820t_write_reg_mask(priv, 0x19, polyfil_cur, 0x60);
1156 if (rc < 0)
1157 return rc;
1158
1159 /* Store current standard. If it changes, re-calibrate the tuner */
1160 priv->delsys = delsys;
1161 priv->type = type;
1162 priv->std = std;
1163 priv->bw = bw;
1164
1165 return 0;
1166 }
1167
1168 static int r820t_read_gain(struct r820t_priv *priv)
1169 {
1170 u8 data[4];
1171 int rc;
1172
1173 rc = r820t_read(priv, 0x00, data, sizeof(data));
1174 if (rc < 0)
1175 return rc;
1176
1177 return ((data[3] & 0x0f) << 1) + ((data[3] & 0xf0) >> 4);
1178 }
1179
1180 #if 0
1181 /* FIXME: This routine requires more testing */
1182 static int r820t_set_gain_mode(struct r820t_priv *priv,
1183 bool set_manual_gain,
1184 int gain)
1185 {
1186 int rc;
1187
1188 if (set_manual_gain) {
1189 int i, total_gain = 0;
1190 uint8_t mix_index = 0, lna_index = 0;
1191 u8 data[4];
1192
1193 /* LNA auto off */
1194 rc = r820t_write_reg_mask(priv, 0x05, 0x10, 0x10);
1195 if (rc < 0)
1196 return rc;
1197
1198 /* Mixer auto off */
1199 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1200 if (rc < 0)
1201 return rc;
1202
1203 rc = r820t_read(priv, 0x00, data, sizeof(data));
1204 if (rc < 0)
1205 return rc;
1206
1207 /* set fixed VGA gain for now (16.3 dB) */
1208 rc = r820t_write_reg_mask(priv, 0x0c, 0x08, 0x9f);
1209 if (rc < 0)
1210 return rc;
1211
1212 for (i = 0; i < 15; i++) {
1213 if (total_gain >= gain)
1214 break;
1215
1216 total_gain += r820t_lna_gain_steps[++lna_index];
1217
1218 if (total_gain >= gain)
1219 break;
1220
1221 total_gain += r820t_mixer_gain_steps[++mix_index];
1222 }
1223
1224 /* set LNA gain */
1225 rc = r820t_write_reg_mask(priv, 0x05, lna_index, 0x0f);
1226 if (rc < 0)
1227 return rc;
1228
1229 /* set Mixer gain */
1230 rc = r820t_write_reg_mask(priv, 0x07, mix_index, 0x0f);
1231 if (rc < 0)
1232 return rc;
1233 } else {
1234 /* LNA */
1235 rc = r820t_write_reg_mask(priv, 0x05, 0, 0x10);
1236 if (rc < 0)
1237 return rc;
1238
1239 /* Mixer */
1240 rc = r820t_write_reg_mask(priv, 0x07, 0x10, 0x10);
1241 if (rc < 0)
1242 return rc;
1243
1244 /* set fixed VGA gain for now (26.5 dB) */
1245 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1246 if (rc < 0)
1247 return rc;
1248 }
1249
1250 return 0;
1251 }
1252 #endif
1253
1254 static int generic_set_freq(struct dvb_frontend *fe,
1255 u32 freq /* in HZ */,
1256 unsigned bw,
1257 enum v4l2_tuner_type type,
1258 v4l2_std_id std, u32 delsys)
1259 {
1260 struct r820t_priv *priv = fe->tuner_priv;
1261 int rc = -EINVAL;
1262 u32 lo_freq;
1263
1264 tuner_dbg("should set frequency to %d kHz, bw %d MHz\n",
1265 freq / 1000, bw);
1266
1267 rc = r820t_set_tv_standard(priv, bw, type, std, delsys);
1268 if (rc < 0)
1269 goto err;
1270
1271 if ((type == V4L2_TUNER_ANALOG_TV) && (std == V4L2_STD_SECAM_LC))
1272 lo_freq = freq - priv->int_freq;
1273 else
1274 lo_freq = freq + priv->int_freq;
1275
1276 rc = r820t_set_mux(priv, lo_freq);
1277 if (rc < 0)
1278 goto err;
1279
1280 rc = r820t_set_pll(priv, type, lo_freq);
1281 if (rc < 0 || !priv->has_lock)
1282 goto err;
1283
1284 rc = r820t_sysfreq_sel(priv, freq, type, std, delsys);
1285 if (rc < 0)
1286 goto err;
1287
1288 tuner_dbg("%s: PLL locked on frequency %d Hz, gain=%d\n",
1289 __func__, freq, r820t_read_gain(priv));
1290
1291 err:
1292
1293 if (rc < 0)
1294 tuner_dbg("%s: failed=%d\n", __func__, rc);
1295 return rc;
1296 }
1297
1298 /*
1299 * r820t standby logic
1300 */
1301
1302 static int r820t_standby(struct r820t_priv *priv)
1303 {
1304 int rc;
1305
1306 /* If device was not initialized yet, don't need to standby */
1307 if (!priv->init_done)
1308 return 0;
1309
1310 rc = r820t_write_reg(priv, 0x06, 0xb1);
1311 if (rc < 0)
1312 return rc;
1313 rc = r820t_write_reg(priv, 0x05, 0x03);
1314 if (rc < 0)
1315 return rc;
1316 rc = r820t_write_reg(priv, 0x07, 0x3a);
1317 if (rc < 0)
1318 return rc;
1319 rc = r820t_write_reg(priv, 0x08, 0x40);
1320 if (rc < 0)
1321 return rc;
1322 rc = r820t_write_reg(priv, 0x09, 0xc0);
1323 if (rc < 0)
1324 return rc;
1325 rc = r820t_write_reg(priv, 0x0a, 0x36);
1326 if (rc < 0)
1327 return rc;
1328 rc = r820t_write_reg(priv, 0x0c, 0x35);
1329 if (rc < 0)
1330 return rc;
1331 rc = r820t_write_reg(priv, 0x0f, 0x68);
1332 if (rc < 0)
1333 return rc;
1334 rc = r820t_write_reg(priv, 0x11, 0x03);
1335 if (rc < 0)
1336 return rc;
1337 rc = r820t_write_reg(priv, 0x17, 0xf4);
1338 if (rc < 0)
1339 return rc;
1340 rc = r820t_write_reg(priv, 0x19, 0x0c);
1341
1342 /* Force initial calibration */
1343 priv->type = -1;
1344
1345 return rc;
1346 }
1347
1348 /*
1349 * r820t device init logic
1350 */
1351
1352 static int r820t_xtal_check(struct r820t_priv *priv)
1353 {
1354 int rc, i;
1355 u8 data[3], val;
1356
1357 /* Initialize the shadow registers */
1358 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1359
1360 /* cap 30pF & Drive Low */
1361 rc = r820t_write_reg_mask(priv, 0x10, 0x0b, 0x0b);
1362 if (rc < 0)
1363 return rc;
1364
1365 /* set pll autotune = 128kHz */
1366 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
1367 if (rc < 0)
1368 return rc;
1369
1370 /* set manual initial reg = 111111; */
1371 rc = r820t_write_reg_mask(priv, 0x13, 0x7f, 0x7f);
1372 if (rc < 0)
1373 return rc;
1374
1375 /* set auto */
1376 rc = r820t_write_reg_mask(priv, 0x13, 0x00, 0x40);
1377 if (rc < 0)
1378 return rc;
1379
1380 /* Try several xtal capacitor alternatives */
1381 for (i = 0; i < ARRAY_SIZE(r820t_xtal_capacitor); i++) {
1382 rc = r820t_write_reg_mask(priv, 0x10,
1383 r820t_xtal_capacitor[i][0], 0x1b);
1384 if (rc < 0)
1385 return rc;
1386
1387 usleep_range(5000, 6000);
1388
1389 rc = r820t_read(priv, 0x00, data, sizeof(data));
1390 if (rc < 0)
1391 return rc;
1392 if (!(data[2] & 0x40))
1393 continue;
1394
1395 val = data[2] & 0x3f;
1396
1397 if (priv->cfg->xtal == 16000000 && (val > 29 || val < 23))
1398 break;
1399
1400 if (val != 0x3f)
1401 break;
1402 }
1403
1404 if (i == ARRAY_SIZE(r820t_xtal_capacitor))
1405 return -EINVAL;
1406
1407 return r820t_xtal_capacitor[i][1];
1408 }
1409
1410 static int r820t_imr_prepare(struct r820t_priv *priv)
1411 {
1412 int rc;
1413
1414 /* Initialize the shadow registers */
1415 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1416
1417 /* lna off (air-in off) */
1418 rc = r820t_write_reg_mask(priv, 0x05, 0x20, 0x20);
1419 if (rc < 0)
1420 return rc;
1421
1422 /* mixer gain mode = manual */
1423 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1424 if (rc < 0)
1425 return rc;
1426
1427 /* filter corner = lowest */
1428 rc = r820t_write_reg_mask(priv, 0x0a, 0x0f, 0x0f);
1429 if (rc < 0)
1430 return rc;
1431
1432 /* filter bw=+2cap, hp=5M */
1433 rc = r820t_write_reg_mask(priv, 0x0b, 0x60, 0x6f);
1434 if (rc < 0)
1435 return rc;
1436
1437 /* adc=on, vga code mode, gain = 26.5dB */
1438 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1439 if (rc < 0)
1440 return rc;
1441
1442 /* ring clk = on */
1443 rc = r820t_write_reg_mask(priv, 0x0f, 0, 0x08);
1444 if (rc < 0)
1445 return rc;
1446
1447 /* ring power = on */
1448 rc = r820t_write_reg_mask(priv, 0x18, 0x10, 0x10);
1449 if (rc < 0)
1450 return rc;
1451
1452 /* from ring = ring pll in */
1453 rc = r820t_write_reg_mask(priv, 0x1c, 0x02, 0x02);
1454 if (rc < 0)
1455 return rc;
1456
1457 /* sw_pdect = det3 */
1458 rc = r820t_write_reg_mask(priv, 0x1e, 0x80, 0x80);
1459 if (rc < 0)
1460 return rc;
1461
1462 /* Set filt_3dB */
1463 rc = r820t_write_reg_mask(priv, 0x06, 0x20, 0x20);
1464
1465 return rc;
1466 }
1467
1468 static int r820t_multi_read(struct r820t_priv *priv)
1469 {
1470 int rc, i;
1471 u8 data[2], min = 0, max = 255, sum = 0;
1472
1473 usleep_range(5000, 6000);
1474
1475 for (i = 0; i < 6; i++) {
1476 rc = r820t_read(priv, 0x00, data, sizeof(data));
1477 if (rc < 0)
1478 return rc;
1479
1480 sum += data[1];
1481
1482 if (data[1] < min)
1483 min = data[1];
1484
1485 if (data[1] > max)
1486 max = data[1];
1487 }
1488 rc = sum - max - min;
1489
1490 return rc;
1491 }
1492
1493 static int r820t_imr_cross(struct r820t_priv *priv,
1494 struct r820t_sect_type iq_point[3],
1495 u8 *x_direct)
1496 {
1497 struct r820t_sect_type cross[5]; /* (0,0)(0,Q-1)(0,I-1)(Q-1,0)(I-1,0) */
1498 struct r820t_sect_type tmp;
1499 int i, rc;
1500 u8 reg08, reg09;
1501
1502 reg08 = r820t_read_cache_reg(priv, 8) & 0xc0;
1503 reg09 = r820t_read_cache_reg(priv, 9) & 0xc0;
1504
1505 tmp.gain_x = 0;
1506 tmp.phase_y = 0;
1507 tmp.value = 255;
1508
1509 for (i = 0; i < 5; i++) {
1510 switch (i) {
1511 case 0:
1512 cross[i].gain_x = reg08;
1513 cross[i].phase_y = reg09;
1514 break;
1515 case 1:
1516 cross[i].gain_x = reg08; /* 0 */
1517 cross[i].phase_y = reg09 + 1; /* Q-1 */
1518 break;
1519 case 2:
1520 cross[i].gain_x = reg08; /* 0 */
1521 cross[i].phase_y = (reg09 | 0x20) + 1; /* I-1 */
1522 break;
1523 case 3:
1524 cross[i].gain_x = reg08 + 1; /* Q-1 */
1525 cross[i].phase_y = reg09;
1526 break;
1527 default:
1528 cross[i].gain_x = (reg08 | 0x20) + 1; /* I-1 */
1529 cross[i].phase_y = reg09;
1530 }
1531
1532 rc = r820t_write_reg(priv, 0x08, cross[i].gain_x);
1533 if (rc < 0)
1534 return rc;
1535
1536 rc = r820t_write_reg(priv, 0x09, cross[i].phase_y);
1537 if (rc < 0)
1538 return rc;
1539
1540 rc = r820t_multi_read(priv);
1541 if (rc < 0)
1542 return rc;
1543
1544 cross[i].value = rc;
1545
1546 if (cross[i].value < tmp.value)
1547 memcpy(&tmp, &cross[i], sizeof(tmp));
1548 }
1549
1550 if ((tmp.phase_y & 0x1f) == 1) { /* y-direction */
1551 *x_direct = 0;
1552
1553 iq_point[0] = cross[0];
1554 iq_point[1] = cross[1];
1555 iq_point[2] = cross[2];
1556 } else { /* (0,0) or x-direction */
1557 *x_direct = 1;
1558
1559 iq_point[0] = cross[0];
1560 iq_point[1] = cross[3];
1561 iq_point[2] = cross[4];
1562 }
1563 return 0;
1564 }
1565
1566 static void r820t_compre_cor(struct r820t_sect_type iq[3])
1567 {
1568 int i;
1569
1570 for (i = 3; i > 0; i--) {
1571 if (iq[0].value > iq[i - 1].value)
1572 swap(iq[0], iq[i - 1]);
1573 }
1574 }
1575
1576 static int r820t_compre_step(struct r820t_priv *priv,
1577 struct r820t_sect_type iq[3], u8 reg)
1578 {
1579 int rc;
1580 struct r820t_sect_type tmp;
1581
1582 /*
1583 * Purpose: if (Gain<9 or Phase<9), Gain+1 or Phase+1 and compare
1584 * with min value:
1585 * new < min => update to min and continue
1586 * new > min => Exit
1587 */
1588
1589 /* min value already saved in iq[0] */
1590 tmp.phase_y = iq[0].phase_y;
1591 tmp.gain_x = iq[0].gain_x;
1592
1593 while (((tmp.gain_x & 0x1f) < IMR_TRIAL) &&
1594 ((tmp.phase_y & 0x1f) < IMR_TRIAL)) {
1595 if (reg == 0x08)
1596 tmp.gain_x++;
1597 else
1598 tmp.phase_y++;
1599
1600 rc = r820t_write_reg(priv, 0x08, tmp.gain_x);
1601 if (rc < 0)
1602 return rc;
1603
1604 rc = r820t_write_reg(priv, 0x09, tmp.phase_y);
1605 if (rc < 0)
1606 return rc;
1607
1608 rc = r820t_multi_read(priv);
1609 if (rc < 0)
1610 return rc;
1611 tmp.value = rc;
1612
1613 if (tmp.value <= iq[0].value) {
1614 iq[0].gain_x = tmp.gain_x;
1615 iq[0].phase_y = tmp.phase_y;
1616 iq[0].value = tmp.value;
1617 } else {
1618 return 0;
1619 }
1620
1621 }
1622
1623 return 0;
1624 }
1625
1626 static int r820t_iq_tree(struct r820t_priv *priv,
1627 struct r820t_sect_type iq[3],
1628 u8 fix_val, u8 var_val, u8 fix_reg)
1629 {
1630 int rc, i;
1631 u8 tmp, var_reg;
1632
1633 /*
1634 * record IMC results by input gain/phase location then adjust
1635 * gain or phase positive 1 step and negtive 1 step,
1636 * both record results
1637 */
1638
1639 if (fix_reg == 0x08)
1640 var_reg = 0x09;
1641 else
1642 var_reg = 0x08;
1643
1644 for (i = 0; i < 3; i++) {
1645 rc = r820t_write_reg(priv, fix_reg, fix_val);
1646 if (rc < 0)
1647 return rc;
1648
1649 rc = r820t_write_reg(priv, var_reg, var_val);
1650 if (rc < 0)
1651 return rc;
1652
1653 rc = r820t_multi_read(priv);
1654 if (rc < 0)
1655 return rc;
1656 iq[i].value = rc;
1657
1658 if (fix_reg == 0x08) {
1659 iq[i].gain_x = fix_val;
1660 iq[i].phase_y = var_val;
1661 } else {
1662 iq[i].phase_y = fix_val;
1663 iq[i].gain_x = var_val;
1664 }
1665
1666 if (i == 0) { /* try right-side point */
1667 var_val++;
1668 } else if (i == 1) { /* try left-side point */
1669 /* if absolute location is 1, change I/Q direction */
1670 if ((var_val & 0x1f) < 0x02) {
1671 tmp = 2 - (var_val & 0x1f);
1672
1673 /* b[5]:I/Q selection. 0:Q-path, 1:I-path */
1674 if (var_val & 0x20) {
1675 var_val &= 0xc0;
1676 var_val |= tmp;
1677 } else {
1678 var_val |= 0x20 | tmp;
1679 }
1680 } else {
1681 var_val -= 2;
1682 }
1683 }
1684 }
1685
1686 return 0;
1687 }
1688
1689 static int r820t_section(struct r820t_priv *priv,
1690 struct r820t_sect_type *iq_point)
1691 {
1692 int rc;
1693 struct r820t_sect_type compare_iq[3], compare_bet[3];
1694
1695 /* Try X-1 column and save min result to compare_bet[0] */
1696 if (!(iq_point->gain_x & 0x1f))
1697 compare_iq[0].gain_x = ((iq_point->gain_x) & 0xdf) + 1; /* Q-path, Gain=1 */
1698 else
1699 compare_iq[0].gain_x = iq_point->gain_x - 1; /* left point */
1700 compare_iq[0].phase_y = iq_point->phase_y;
1701
1702 /* y-direction */
1703 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1704 compare_iq[0].phase_y, 0x08);
1705 if (rc < 0)
1706 return rc;
1707
1708 r820t_compre_cor(compare_iq);
1709
1710 compare_bet[0] = compare_iq[0];
1711
1712 /* Try X column and save min result to compare_bet[1] */
1713 compare_iq[0].gain_x = iq_point->gain_x;
1714 compare_iq[0].phase_y = iq_point->phase_y;
1715
1716 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1717 compare_iq[0].phase_y, 0x08);
1718 if (rc < 0)
1719 return rc;
1720
1721 r820t_compre_cor(compare_iq);
1722
1723 compare_bet[1] = compare_iq[0];
1724
1725 /* Try X+1 column and save min result to compare_bet[2] */
1726 if ((iq_point->gain_x & 0x1f) == 0x00)
1727 compare_iq[0].gain_x = ((iq_point->gain_x) | 0x20) + 1; /* I-path, Gain=1 */
1728 else
1729 compare_iq[0].gain_x = iq_point->gain_x + 1;
1730 compare_iq[0].phase_y = iq_point->phase_y;
1731
1732 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1733 compare_iq[0].phase_y, 0x08);
1734 if (rc < 0)
1735 return rc;
1736
1737 r820t_compre_cor(compare_iq);
1738
1739 compare_bet[2] = compare_iq[0];
1740
1741 r820t_compre_cor(compare_bet);
1742
1743 *iq_point = compare_bet[0];
1744
1745 return 0;
1746 }
1747
1748 static int r820t_vga_adjust(struct r820t_priv *priv)
1749 {
1750 int rc;
1751 u8 vga_count;
1752
1753 /* increase vga power to let image significant */
1754 for (vga_count = 12; vga_count < 16; vga_count++) {
1755 rc = r820t_write_reg_mask(priv, 0x0c, vga_count, 0x0f);
1756 if (rc < 0)
1757 return rc;
1758
1759 usleep_range(10000, 11000);
1760
1761 rc = r820t_multi_read(priv);
1762 if (rc < 0)
1763 return rc;
1764
1765 if (rc > 40 * 4)
1766 break;
1767 }
1768
1769 return 0;
1770 }
1771
1772 static int r820t_iq(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1773 {
1774 struct r820t_sect_type compare_iq[3];
1775 int rc;
1776 u8 x_direction = 0; /* 1:x, 0:y */
1777 u8 dir_reg, other_reg;
1778
1779 r820t_vga_adjust(priv);
1780
1781 rc = r820t_imr_cross(priv, compare_iq, &x_direction);
1782 if (rc < 0)
1783 return rc;
1784
1785 if (x_direction == 1) {
1786 dir_reg = 0x08;
1787 other_reg = 0x09;
1788 } else {
1789 dir_reg = 0x09;
1790 other_reg = 0x08;
1791 }
1792
1793 /* compare and find min of 3 points. determine i/q direction */
1794 r820t_compre_cor(compare_iq);
1795
1796 /* increase step to find min value of this direction */
1797 rc = r820t_compre_step(priv, compare_iq, dir_reg);
1798 if (rc < 0)
1799 return rc;
1800
1801 /* the other direction */
1802 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1803 compare_iq[0].phase_y, dir_reg);
1804 if (rc < 0)
1805 return rc;
1806
1807 /* compare and find min of 3 points. determine i/q direction */
1808 r820t_compre_cor(compare_iq);
1809
1810 /* increase step to find min value on this direction */
1811 rc = r820t_compre_step(priv, compare_iq, other_reg);
1812 if (rc < 0)
1813 return rc;
1814
1815 /* check 3 points again */
1816 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1817 compare_iq[0].phase_y, other_reg);
1818 if (rc < 0)
1819 return rc;
1820
1821 r820t_compre_cor(compare_iq);
1822
1823 /* section-9 check */
1824 rc = r820t_section(priv, compare_iq);
1825
1826 *iq_pont = compare_iq[0];
1827
1828 /* reset gain/phase control setting */
1829 rc = r820t_write_reg_mask(priv, 0x08, 0, 0x3f);
1830 if (rc < 0)
1831 return rc;
1832
1833 rc = r820t_write_reg_mask(priv, 0x09, 0, 0x3f);
1834
1835 return rc;
1836 }
1837
1838 static int r820t_f_imr(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1839 {
1840 int rc;
1841
1842 r820t_vga_adjust(priv);
1843
1844 /*
1845 * search surrounding points from previous point
1846 * try (x-1), (x), (x+1) columns, and find min IMR result point
1847 */
1848 rc = r820t_section(priv, iq_pont);
1849 if (rc < 0)
1850 return rc;
1851
1852 return 0;
1853 }
1854
1855 static int r820t_imr(struct r820t_priv *priv, unsigned imr_mem, bool im_flag)
1856 {
1857 struct r820t_sect_type imr_point;
1858 int rc;
1859 u32 ring_vco, ring_freq, ring_ref;
1860 u8 n_ring, n;
1861 int reg18, reg19, reg1f;
1862
1863 if (priv->cfg->xtal > 24000000)
1864 ring_ref = priv->cfg->xtal / 2000;
1865 else
1866 ring_ref = priv->cfg->xtal / 1000;
1867
1868 n_ring = 15;
1869 for (n = 0; n < 16; n++) {
1870 if ((16 + n) * 8 * ring_ref >= 3100000) {
1871 n_ring = n;
1872 break;
1873 }
1874 }
1875
1876 reg18 = r820t_read_cache_reg(priv, 0x18);
1877 reg19 = r820t_read_cache_reg(priv, 0x19);
1878 reg1f = r820t_read_cache_reg(priv, 0x1f);
1879
1880 reg18 &= 0xf0; /* set ring[3:0] */
1881 reg18 |= n_ring;
1882
1883 ring_vco = (16 + n_ring) * 8 * ring_ref;
1884
1885 reg18 &= 0xdf; /* clear ring_se23 */
1886 reg19 &= 0xfc; /* clear ring_seldiv */
1887 reg1f &= 0xfc; /* clear ring_att */
1888
1889 switch (imr_mem) {
1890 case 0:
1891 ring_freq = ring_vco / 48;
1892 reg18 |= 0x20; /* ring_se23 = 1 */
1893 reg19 |= 0x03; /* ring_seldiv = 3 */
1894 reg1f |= 0x02; /* ring_att 10 */
1895 break;
1896 case 1:
1897 ring_freq = ring_vco / 16;
1898 reg18 |= 0x00; /* ring_se23 = 0 */
1899 reg19 |= 0x02; /* ring_seldiv = 2 */
1900 reg1f |= 0x00; /* pw_ring 00 */
1901 break;
1902 case 2:
1903 ring_freq = ring_vco / 8;
1904 reg18 |= 0x00; /* ring_se23 = 0 */
1905 reg19 |= 0x01; /* ring_seldiv = 1 */
1906 reg1f |= 0x03; /* pw_ring 11 */
1907 break;
1908 case 3:
1909 ring_freq = ring_vco / 6;
1910 reg18 |= 0x20; /* ring_se23 = 1 */
1911 reg19 |= 0x00; /* ring_seldiv = 0 */
1912 reg1f |= 0x03; /* pw_ring 11 */
1913 break;
1914 case 4:
1915 ring_freq = ring_vco / 4;
1916 reg18 |= 0x00; /* ring_se23 = 0 */
1917 reg19 |= 0x00; /* ring_seldiv = 0 */
1918 reg1f |= 0x01; /* pw_ring 01 */
1919 break;
1920 default:
1921 ring_freq = ring_vco / 4;
1922 reg18 |= 0x00; /* ring_se23 = 0 */
1923 reg19 |= 0x00; /* ring_seldiv = 0 */
1924 reg1f |= 0x01; /* pw_ring 01 */
1925 break;
1926 }
1927
1928
1929 /* write pw_ring, n_ring, ringdiv2 registers */
1930
1931 /* n_ring, ring_se23 */
1932 rc = r820t_write_reg(priv, 0x18, reg18);
1933 if (rc < 0)
1934 return rc;
1935
1936 /* ring_sediv */
1937 rc = r820t_write_reg(priv, 0x19, reg19);
1938 if (rc < 0)
1939 return rc;
1940
1941 /* pw_ring */
1942 rc = r820t_write_reg(priv, 0x1f, reg1f);
1943 if (rc < 0)
1944 return rc;
1945
1946 /* mux input freq ~ rf_in freq */
1947 rc = r820t_set_mux(priv, (ring_freq - 5300) * 1000);
1948 if (rc < 0)
1949 return rc;
1950
1951 rc = r820t_set_pll(priv, V4L2_TUNER_DIGITAL_TV,
1952 (ring_freq - 5300) * 1000);
1953 if (!priv->has_lock)
1954 rc = -EINVAL;
1955 if (rc < 0)
1956 return rc;
1957
1958 if (im_flag) {
1959 rc = r820t_iq(priv, &imr_point);
1960 } else {
1961 imr_point.gain_x = priv->imr_data[3].gain_x;
1962 imr_point.phase_y = priv->imr_data[3].phase_y;
1963 imr_point.value = priv->imr_data[3].value;
1964
1965 rc = r820t_f_imr(priv, &imr_point);
1966 }
1967 if (rc < 0)
1968 return rc;
1969
1970 /* save IMR value */
1971 switch (imr_mem) {
1972 case 0:
1973 priv->imr_data[0].gain_x = imr_point.gain_x;
1974 priv->imr_data[0].phase_y = imr_point.phase_y;
1975 priv->imr_data[0].value = imr_point.value;
1976 break;
1977 case 1:
1978 priv->imr_data[1].gain_x = imr_point.gain_x;
1979 priv->imr_data[1].phase_y = imr_point.phase_y;
1980 priv->imr_data[1].value = imr_point.value;
1981 break;
1982 case 2:
1983 priv->imr_data[2].gain_x = imr_point.gain_x;
1984 priv->imr_data[2].phase_y = imr_point.phase_y;
1985 priv->imr_data[2].value = imr_point.value;
1986 break;
1987 case 3:
1988 priv->imr_data[3].gain_x = imr_point.gain_x;
1989 priv->imr_data[3].phase_y = imr_point.phase_y;
1990 priv->imr_data[3].value = imr_point.value;
1991 break;
1992 case 4:
1993 priv->imr_data[4].gain_x = imr_point.gain_x;
1994 priv->imr_data[4].phase_y = imr_point.phase_y;
1995 priv->imr_data[4].value = imr_point.value;
1996 break;
1997 default:
1998 priv->imr_data[4].gain_x = imr_point.gain_x;
1999 priv->imr_data[4].phase_y = imr_point.phase_y;
2000 priv->imr_data[4].value = imr_point.value;
2001 break;
2002 }
2003
2004 return 0;
2005 }
2006
2007 static int r820t_imr_callibrate(struct r820t_priv *priv)
2008 {
2009 int rc, i;
2010 int xtal_cap = 0;
2011
2012 if (priv->init_done)
2013 return 0;
2014
2015 /* Detect Xtal capacitance */
2016 if ((priv->cfg->rafael_chip == CHIP_R820T) ||
2017 (priv->cfg->rafael_chip == CHIP_R828S) ||
2018 (priv->cfg->rafael_chip == CHIP_R820C)) {
2019 priv->xtal_cap_sel = XTAL_HIGH_CAP_0P;
2020 } else {
2021 /* Initialize registers */
2022 rc = r820t_write(priv, 0x05,
2023 r820t_init_array, sizeof(r820t_init_array));
2024 if (rc < 0)
2025 return rc;
2026 for (i = 0; i < 3; i++) {
2027 rc = r820t_xtal_check(priv);
2028 if (rc < 0)
2029 return rc;
2030 if (!i || rc > xtal_cap)
2031 xtal_cap = rc;
2032 }
2033 priv->xtal_cap_sel = xtal_cap;
2034 }
2035
2036 /*
2037 * Disables IMR callibration. That emulates the same behaviour
2038 * as what is done by rtl-sdr userspace library. Useful for testing
2039 */
2040 if (no_imr_cal) {
2041 priv->init_done = true;
2042
2043 return 0;
2044 }
2045
2046 /* Initialize registers */
2047 rc = r820t_write(priv, 0x05,
2048 r820t_init_array, sizeof(r820t_init_array));
2049 if (rc < 0)
2050 return rc;
2051
2052 rc = r820t_imr_prepare(priv);
2053 if (rc < 0)
2054 return rc;
2055
2056 rc = r820t_imr(priv, 3, true);
2057 if (rc < 0)
2058 return rc;
2059 rc = r820t_imr(priv, 1, false);
2060 if (rc < 0)
2061 return rc;
2062 rc = r820t_imr(priv, 0, false);
2063 if (rc < 0)
2064 return rc;
2065 rc = r820t_imr(priv, 2, false);
2066 if (rc < 0)
2067 return rc;
2068 rc = r820t_imr(priv, 4, false);
2069 if (rc < 0)
2070 return rc;
2071
2072 priv->init_done = true;
2073 priv->imr_done = true;
2074
2075 return 0;
2076 }
2077
2078 #if 0
2079 /* Not used, for now */
2080 static int r820t_gpio(struct r820t_priv *priv, bool enable)
2081 {
2082 return r820t_write_reg_mask(priv, 0x0f, enable ? 1 : 0, 0x01);
2083 }
2084 #endif
2085
2086 /*
2087 * r820t frontend operations and tuner attach code
2088 *
2089 * All driver locks and i2c control are only in this part of the code
2090 */
2091
2092 static int r820t_init(struct dvb_frontend *fe)
2093 {
2094 struct r820t_priv *priv = fe->tuner_priv;
2095 int rc;
2096
2097 tuner_dbg("%s:\n", __func__);
2098
2099 mutex_lock(&priv->lock);
2100 if (fe->ops.i2c_gate_ctrl)
2101 fe->ops.i2c_gate_ctrl(fe, 1);
2102
2103 rc = r820t_imr_callibrate(priv);
2104 if (rc < 0)
2105 goto err;
2106
2107 /* Initialize registers */
2108 rc = r820t_write(priv, 0x05,
2109 r820t_init_array, sizeof(r820t_init_array));
2110
2111 err:
2112 if (fe->ops.i2c_gate_ctrl)
2113 fe->ops.i2c_gate_ctrl(fe, 0);
2114 mutex_unlock(&priv->lock);
2115
2116 if (rc < 0)
2117 tuner_dbg("%s: failed=%d\n", __func__, rc);
2118 return rc;
2119 }
2120
2121 static int r820t_sleep(struct dvb_frontend *fe)
2122 {
2123 struct r820t_priv *priv = fe->tuner_priv;
2124 int rc;
2125
2126 tuner_dbg("%s:\n", __func__);
2127
2128 mutex_lock(&priv->lock);
2129 if (fe->ops.i2c_gate_ctrl)
2130 fe->ops.i2c_gate_ctrl(fe, 1);
2131
2132 rc = r820t_standby(priv);
2133
2134 if (fe->ops.i2c_gate_ctrl)
2135 fe->ops.i2c_gate_ctrl(fe, 0);
2136 mutex_unlock(&priv->lock);
2137
2138 tuner_dbg("%s: failed=%d\n", __func__, rc);
2139 return rc;
2140 }
2141
2142 static int r820t_set_analog_freq(struct dvb_frontend *fe,
2143 struct analog_parameters *p)
2144 {
2145 struct r820t_priv *priv = fe->tuner_priv;
2146 unsigned bw;
2147 int rc;
2148
2149 tuner_dbg("%s called\n", __func__);
2150
2151 /* if std is not defined, choose one */
2152 if (!p->std)
2153 p->std = V4L2_STD_MN;
2154
2155 if ((p->std == V4L2_STD_PAL_M) || (p->std == V4L2_STD_NTSC))
2156 bw = 6;
2157 else
2158 bw = 8;
2159
2160 mutex_lock(&priv->lock);
2161 if (fe->ops.i2c_gate_ctrl)
2162 fe->ops.i2c_gate_ctrl(fe, 1);
2163
2164 rc = generic_set_freq(fe, 62500l * p->frequency, bw,
2165 V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED);
2166
2167 if (fe->ops.i2c_gate_ctrl)
2168 fe->ops.i2c_gate_ctrl(fe, 0);
2169 mutex_unlock(&priv->lock);
2170
2171 return rc;
2172 }
2173
2174 static int r820t_set_params(struct dvb_frontend *fe)
2175 {
2176 struct r820t_priv *priv = fe->tuner_priv;
2177 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2178 int rc;
2179 unsigned bw;
2180
2181 tuner_dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
2182 __func__, c->delivery_system, c->frequency, c->bandwidth_hz);
2183
2184 mutex_lock(&priv->lock);
2185 if (fe->ops.i2c_gate_ctrl)
2186 fe->ops.i2c_gate_ctrl(fe, 1);
2187
2188 bw = (c->bandwidth_hz + 500000) / 1000000;
2189 if (!bw)
2190 bw = 8;
2191
2192 rc = generic_set_freq(fe, c->frequency, bw,
2193 V4L2_TUNER_DIGITAL_TV, 0, c->delivery_system);
2194
2195 if (fe->ops.i2c_gate_ctrl)
2196 fe->ops.i2c_gate_ctrl(fe, 0);
2197 mutex_unlock(&priv->lock);
2198
2199 if (rc)
2200 tuner_dbg("%s: failed=%d\n", __func__, rc);
2201 return rc;
2202 }
2203
2204 static int r820t_signal(struct dvb_frontend *fe, u16 *strength)
2205 {
2206 struct r820t_priv *priv = fe->tuner_priv;
2207 int rc = 0;
2208
2209 mutex_lock(&priv->lock);
2210 if (fe->ops.i2c_gate_ctrl)
2211 fe->ops.i2c_gate_ctrl(fe, 1);
2212
2213 if (priv->has_lock) {
2214 rc = r820t_read_gain(priv);
2215 if (rc < 0)
2216 goto err;
2217
2218 /* A higher gain at LNA means a lower signal strength */
2219 *strength = (45 - rc) << 4 | 0xff;
2220 if (*strength == 0xff)
2221 *strength = 0;
2222 } else {
2223 *strength = 0;
2224 }
2225
2226 err:
2227 if (fe->ops.i2c_gate_ctrl)
2228 fe->ops.i2c_gate_ctrl(fe, 0);
2229 mutex_unlock(&priv->lock);
2230
2231 tuner_dbg("%s: %s, gain=%d strength=%d\n",
2232 __func__,
2233 priv->has_lock ? "PLL locked" : "no signal",
2234 rc, *strength);
2235
2236 return 0;
2237 }
2238
2239 static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
2240 {
2241 struct r820t_priv *priv = fe->tuner_priv;
2242
2243 tuner_dbg("%s:\n", __func__);
2244
2245 *frequency = priv->int_freq;
2246
2247 return 0;
2248 }
2249
2250 static int r820t_release(struct dvb_frontend *fe)
2251 {
2252 struct r820t_priv *priv = fe->tuner_priv;
2253
2254 tuner_dbg("%s:\n", __func__);
2255
2256 mutex_lock(&r820t_list_mutex);
2257
2258 if (priv)
2259 hybrid_tuner_release_state(priv);
2260
2261 mutex_unlock(&r820t_list_mutex);
2262
2263 fe->tuner_priv = NULL;
2264
2265 return 0;
2266 }
2267
2268 static const struct dvb_tuner_ops r820t_tuner_ops = {
2269 .info = {
2270 .name = "Rafael Micro R820T",
2271 .frequency_min = 42000000,
2272 .frequency_max = 1002000000,
2273 },
2274 .init = r820t_init,
2275 .release = r820t_release,
2276 .sleep = r820t_sleep,
2277 .set_params = r820t_set_params,
2278 .set_analog_params = r820t_set_analog_freq,
2279 .get_if_frequency = r820t_get_if_frequency,
2280 .get_rf_strength = r820t_signal,
2281 };
2282
2283 struct dvb_frontend *r820t_attach(struct dvb_frontend *fe,
2284 struct i2c_adapter *i2c,
2285 const struct r820t_config *cfg)
2286 {
2287 struct r820t_priv *priv;
2288 int rc = -ENODEV;
2289 u8 data[5];
2290 int instance;
2291
2292 mutex_lock(&r820t_list_mutex);
2293
2294 instance = hybrid_tuner_request_state(struct r820t_priv, priv,
2295 hybrid_tuner_instance_list,
2296 i2c, cfg->i2c_addr,
2297 "r820t");
2298 switch (instance) {
2299 case 0:
2300 /* memory allocation failure */
2301 goto err_no_gate;
2302 break;
2303 case 1:
2304 /* new tuner instance */
2305 priv->cfg = cfg;
2306
2307 mutex_init(&priv->lock);
2308
2309 fe->tuner_priv = priv;
2310 break;
2311 case 2:
2312 /* existing tuner instance */
2313 fe->tuner_priv = priv;
2314 break;
2315 }
2316
2317 if (fe->ops.i2c_gate_ctrl)
2318 fe->ops.i2c_gate_ctrl(fe, 1);
2319
2320 /* check if the tuner is there */
2321 rc = r820t_read(priv, 0x00, data, sizeof(data));
2322 if (rc < 0)
2323 goto err;
2324
2325 rc = r820t_sleep(fe);
2326 if (rc < 0)
2327 goto err;
2328
2329 tuner_info("Rafael Micro r820t successfully identified\n");
2330
2331 if (fe->ops.i2c_gate_ctrl)
2332 fe->ops.i2c_gate_ctrl(fe, 0);
2333
2334 mutex_unlock(&r820t_list_mutex);
2335
2336 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops,
2337 sizeof(struct dvb_tuner_ops));
2338
2339 return fe;
2340 err:
2341 if (fe->ops.i2c_gate_ctrl)
2342 fe->ops.i2c_gate_ctrl(fe, 0);
2343
2344 err_no_gate:
2345 mutex_unlock(&r820t_list_mutex);
2346
2347 tuner_info("%s: failed=%d\n", __func__, rc);
2348 r820t_release(fe);
2349 return NULL;
2350 }
2351 EXPORT_SYMBOL_GPL(r820t_attach);
2352
2353 MODULE_DESCRIPTION("Rafael Micro r820t silicon tuner driver");
2354 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
2355 MODULE_LICENSE("GPL");
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