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[media] r820t: Remove a warning for an unused value
[deliverable/linux.git] / drivers / media / tuners / r820t.c
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)
368 len = NUM_REGS;
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 if (vco_fine_tune > VCO_POWER_REF)
616 div_num = div_num - 1;
617 else if (vco_fine_tune < VCO_POWER_REF)
618 div_num = div_num + 1;
619
620 rc = r820t_write_reg_mask(priv, 0x10, div_num << 5, 0xe0);
621 if (rc < 0)
622 return rc;
623
624 vco_freq = freq * mix_div;
625 nint = vco_freq / (2 * pll_ref);
626 vco_fra = vco_freq - 2 * pll_ref * nint;
627
628 /* boundary spur prevention */
629 if (vco_fra < pll_ref / 64) {
630 vco_fra = 0;
631 } else if (vco_fra > pll_ref * 127 / 64) {
632 vco_fra = 0;
633 nint++;
634 } else if ((vco_fra > pll_ref * 127 / 128) && (vco_fra < pll_ref)) {
635 vco_fra = pll_ref * 127 / 128;
636 } else if ((vco_fra > pll_ref) && (vco_fra < pll_ref * 129 / 128)) {
637 vco_fra = pll_ref * 129 / 128;
638 }
639
640 if (nint > 63) {
641 tuner_info("No valid PLL values for %u kHz!\n", freq);
642 return -EINVAL;
643 }
644
645 ni = (nint - 13) / 4;
646 si = nint - 4 * ni - 13;
647
648 rc = r820t_write_reg(priv, 0x14, ni + (si << 6));
649 if (rc < 0)
650 return rc;
651
652 /* pw_sdm */
653 if (!vco_fra)
654 val = 0x08;
655 else
656 val = 0x00;
657
658 rc = r820t_write_reg_mask(priv, 0x12, val, 0x08);
659 if (rc < 0)
660 return rc;
661
662 /* sdm calculator */
663 while (vco_fra > 1) {
664 if (vco_fra > (2 * pll_ref / n_sdm)) {
665 sdm = sdm + 32768 / (n_sdm / 2);
666 vco_fra = vco_fra - 2 * pll_ref / n_sdm;
667 if (n_sdm >= 0x8000)
668 break;
669 }
670 n_sdm = n_sdm << 1;
671 }
672
673 tuner_dbg("freq %d kHz, pll ref %d%s, sdm=0x%04x\n",
674 freq, pll_ref, refdiv2 ? " / 2" : "", sdm);
675
676 rc = r820t_write_reg(priv, 0x16, sdm >> 8);
677 if (rc < 0)
678 return rc;
679 rc = r820t_write_reg(priv, 0x15, sdm & 0xff);
680 if (rc < 0)
681 return rc;
682
683 for (i = 0; i < 2; i++) {
684 usleep_range(sleep_time, sleep_time + 1000);
685
686 /* Check if PLL has locked */
687 rc = r820t_read(priv, 0x00, data, 3);
688 if (rc < 0)
689 return rc;
690 if (data[2] & 0x40)
691 break;
692
693 if (!i) {
694 /* Didn't lock. Increase VCO current */
695 rc = r820t_write_reg_mask(priv, 0x12, 0x60, 0xe0);
696 if (rc < 0)
697 return rc;
698 }
699 }
700
701 if (!(data[2] & 0x40)) {
702 priv->has_lock = false;
703 return 0;
704 }
705
706 priv->has_lock = true;
707 tuner_dbg("tuner has lock at frequency %d kHz\n", freq);
708
709 /* set pll autotune = 8kHz */
710 rc = r820t_write_reg_mask(priv, 0x1a, 0x08, 0x08);
711
712 return rc;
713 }
714
715 static int r820t_sysfreq_sel(struct r820t_priv *priv, u32 freq,
716 enum v4l2_tuner_type type,
717 v4l2_std_id std,
718 u32 delsys)
719 {
720 int rc;
721 u8 mixer_top, lna_top, cp_cur, div_buf_cur, lna_vth_l, mixer_vth_l;
722 u8 air_cable1_in, cable2_in, pre_dect, lna_discharge, filter_cur;
723
724 tuner_dbg("adjusting tuner parameters for the standard\n");
725
726 switch (delsys) {
727 case SYS_DVBT:
728 if ((freq == 506000000) || (freq == 666000000) ||
729 (freq == 818000000)) {
730 mixer_top = 0x14; /* mixer top:14 , top-1, low-discharge */
731 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
732 cp_cur = 0x28; /* 101, 0.2 */
733 div_buf_cur = 0x20; /* 10, 200u */
734 } else {
735 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
736 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
737 cp_cur = 0x38; /* 111, auto */
738 div_buf_cur = 0x30; /* 11, 150u */
739 }
740 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
741 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
742 air_cable1_in = 0x00;
743 cable2_in = 0x00;
744 pre_dect = 0x40;
745 lna_discharge = 14;
746 filter_cur = 0x40; /* 10, low */
747 break;
748 case SYS_DVBT2:
749 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
750 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
751 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
752 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
753 air_cable1_in = 0x00;
754 cable2_in = 0x00;
755 pre_dect = 0x40;
756 lna_discharge = 14;
757 cp_cur = 0x38; /* 111, auto */
758 div_buf_cur = 0x30; /* 11, 150u */
759 filter_cur = 0x40; /* 10, low */
760 break;
761 case SYS_ISDBT:
762 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
763 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
764 lna_vth_l = 0x75; /* lna vth 1.04 , vtl 0.84 */
765 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
766 air_cable1_in = 0x00;
767 cable2_in = 0x00;
768 pre_dect = 0x40;
769 lna_discharge = 14;
770 cp_cur = 0x38; /* 111, auto */
771 div_buf_cur = 0x30; /* 11, 150u */
772 filter_cur = 0x40; /* 10, low */
773 break;
774 default: /* DVB-T 8M */
775 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
776 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
777 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
778 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
779 air_cable1_in = 0x00;
780 cable2_in = 0x00;
781 pre_dect = 0x40;
782 lna_discharge = 14;
783 cp_cur = 0x38; /* 111, auto */
784 div_buf_cur = 0x30; /* 11, 150u */
785 filter_cur = 0x40; /* 10, low */
786 break;
787 }
788
789 if (priv->cfg->use_diplexer &&
790 ((priv->cfg->rafael_chip == CHIP_R820T) ||
791 (priv->cfg->rafael_chip == CHIP_R828S) ||
792 (priv->cfg->rafael_chip == CHIP_R820C))) {
793 if (freq > DIP_FREQ)
794 air_cable1_in = 0x00;
795 else
796 air_cable1_in = 0x60;
797 cable2_in = 0x00;
798 }
799
800
801 if (priv->cfg->use_predetect) {
802 rc = r820t_write_reg_mask(priv, 0x06, pre_dect, 0x40);
803 if (rc < 0)
804 return rc;
805 }
806
807 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7);
808 if (rc < 0)
809 return rc;
810 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0xf8);
811 if (rc < 0)
812 return rc;
813 rc = r820t_write_reg(priv, 0x0d, lna_vth_l);
814 if (rc < 0)
815 return rc;
816 rc = r820t_write_reg(priv, 0x0e, mixer_vth_l);
817 if (rc < 0)
818 return rc;
819
820 /* Air-IN only for Astrometa */
821 rc = r820t_write_reg_mask(priv, 0x05, air_cable1_in, 0x60);
822 if (rc < 0)
823 return rc;
824 rc = r820t_write_reg_mask(priv, 0x06, cable2_in, 0x08);
825 if (rc < 0)
826 return rc;
827
828 rc = r820t_write_reg_mask(priv, 0x11, cp_cur, 0x38);
829 if (rc < 0)
830 return rc;
831 rc = r820t_write_reg_mask(priv, 0x17, div_buf_cur, 0x30);
832 if (rc < 0)
833 return rc;
834 rc = r820t_write_reg_mask(priv, 0x0a, filter_cur, 0x60);
835 if (rc < 0)
836 return rc;
837 /*
838 * Original driver initializes regs 0x05 and 0x06 with the
839 * same value again on this point. Probably, it is just an
840 * error there
841 */
842
843 /*
844 * Set LNA
845 */
846
847 tuner_dbg("adjusting LNA parameters\n");
848 if (type != V4L2_TUNER_ANALOG_TV) {
849 /* LNA TOP: lowest */
850 rc = r820t_write_reg_mask(priv, 0x1d, 0, 0x38);
851 if (rc < 0)
852 return rc;
853
854 /* 0: normal mode */
855 rc = r820t_write_reg_mask(priv, 0x1c, 0, 0x04);
856 if (rc < 0)
857 return rc;
858
859 /* 0: PRE_DECT off */
860 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
861 if (rc < 0)
862 return rc;
863
864 /* agc clk 250hz */
865 rc = r820t_write_reg_mask(priv, 0x1a, 0x30, 0x30);
866 if (rc < 0)
867 return rc;
868
869 msleep(250);
870
871 /* write LNA TOP = 3 */
872 rc = r820t_write_reg_mask(priv, 0x1d, 0x18, 0x38);
873 if (rc < 0)
874 return rc;
875
876 /*
877 * write discharge mode
878 * FIXME: IMHO, the mask here is wrong, but it matches
879 * what's there at the original driver
880 */
881 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
882 if (rc < 0)
883 return rc;
884
885 /* LNA discharge current */
886 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
887 if (rc < 0)
888 return rc;
889
890 /* agc clk 60hz */
891 rc = r820t_write_reg_mask(priv, 0x1a, 0x20, 0x30);
892 if (rc < 0)
893 return rc;
894 } else {
895 /* PRE_DECT off */
896 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
897 if (rc < 0)
898 return rc;
899
900 /* write LNA TOP */
901 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0x38);
902 if (rc < 0)
903 return rc;
904
905 /*
906 * write discharge mode
907 * FIXME: IMHO, the mask here is wrong, but it matches
908 * what's there at the original driver
909 */
910 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
911 if (rc < 0)
912 return rc;
913
914 /* LNA discharge current */
915 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
916 if (rc < 0)
917 return rc;
918
919 /* agc clk 1Khz, external det1 cap 1u */
920 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x30);
921 if (rc < 0)
922 return rc;
923
924 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x04);
925 if (rc < 0)
926 return rc;
927 }
928 return 0;
929 }
930
931 static int r820t_set_tv_standard(struct r820t_priv *priv,
932 unsigned bw,
933 enum v4l2_tuner_type type,
934 v4l2_std_id std, u32 delsys)
935
936 {
937 int rc, i;
938 u32 if_khz, filt_cal_lo;
939 u8 data[5], val;
940 u8 filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through;
941 u8 lt_att, flt_ext_widest, polyfil_cur;
942 bool need_calibration;
943
944 tuner_dbg("selecting the delivery system\n");
945
946 if (delsys == SYS_ISDBT) {
947 if_khz = 4063;
948 filt_cal_lo = 59000;
949 filt_gain = 0x10; /* +3db, 6mhz on */
950 img_r = 0x00; /* image negative */
951 filt_q = 0x10; /* r10[4]:low q(1'b1) */
952 hp_cor = 0x6a; /* 1.7m disable, +2cap, 1.25mhz */
953 ext_enable = 0x40; /* r30[6], ext enable; r30[5]:0 ext at lna max */
954 loop_through = 0x00; /* r5[7], lt on */
955 lt_att = 0x00; /* r31[7], lt att enable */
956 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
957 polyfil_cur = 0x60; /* r25[6:5]:min */
958 } else {
959 if (bw <= 6) {
960 if_khz = 3570;
961 filt_cal_lo = 56000; /* 52000->56000 */
962 filt_gain = 0x10; /* +3db, 6mhz on */
963 img_r = 0x00; /* image negative */
964 filt_q = 0x10; /* r10[4]:low q(1'b1) */
965 hp_cor = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */
966 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
967 loop_through = 0x00; /* r5[7], lt on */
968 lt_att = 0x00; /* r31[7], lt att enable */
969 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
970 polyfil_cur = 0x60; /* r25[6:5]:min */
971 } else if (bw == 7) {
972 #if 0
973 /*
974 * There are two 7 MHz tables defined on the original
975 * driver, but just the second one seems to be visible
976 * by rtl2832. Keep this one here commented, as it
977 * might be needed in the future
978 */
979
980 if_khz = 4070;
981 filt_cal_lo = 60000;
982 filt_gain = 0x10; /* +3db, 6mhz on */
983 img_r = 0x00; /* image negative */
984 filt_q = 0x10; /* r10[4]:low q(1'b1) */
985 hp_cor = 0x2b; /* 1.7m disable, +1cap, 1.0mhz */
986 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
987 loop_through = 0x00; /* r5[7], lt on */
988 lt_att = 0x00; /* r31[7], lt att enable */
989 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
990 polyfil_cur = 0x60; /* r25[6:5]:min */
991 #endif
992 /* 7 MHz, second table */
993 if_khz = 4570;
994 filt_cal_lo = 63000;
995 filt_gain = 0x10; /* +3db, 6mhz on */
996 img_r = 0x00; /* image negative */
997 filt_q = 0x10; /* r10[4]:low q(1'b1) */
998 hp_cor = 0x2a; /* 1.7m disable, +1cap, 1.25mhz */
999 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1000 loop_through = 0x00; /* r5[7], lt on */
1001 lt_att = 0x00; /* r31[7], lt att enable */
1002 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1003 polyfil_cur = 0x60; /* r25[6:5]:min */
1004 } else {
1005 if_khz = 4570;
1006 filt_cal_lo = 68500;
1007 filt_gain = 0x10; /* +3db, 6mhz on */
1008 img_r = 0x00; /* image negative */
1009 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1010 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */
1011 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1012 loop_through = 0x00; /* r5[7], lt on */
1013 lt_att = 0x00; /* r31[7], lt att enable */
1014 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1015 polyfil_cur = 0x60; /* r25[6:5]:min */
1016 }
1017 }
1018
1019 /* Initialize the shadow registers */
1020 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1021
1022 /* Init Flag & Xtal_check Result */
1023 if (priv->imr_done)
1024 val = 1 | priv->xtal_cap_sel << 1;
1025 else
1026 val = 0;
1027 rc = r820t_write_reg_mask(priv, 0x0c, val, 0x0f);
1028 if (rc < 0)
1029 return rc;
1030
1031 /* version */
1032 rc = r820t_write_reg_mask(priv, 0x13, VER_NUM, 0x3f);
1033 if (rc < 0)
1034 return rc;
1035
1036 /* for LT Gain test */
1037 if (type != V4L2_TUNER_ANALOG_TV) {
1038 rc = r820t_write_reg_mask(priv, 0x1d, 0x00, 0x38);
1039 if (rc < 0)
1040 return rc;
1041 usleep_range(1000, 2000);
1042 }
1043 priv->int_freq = if_khz * 1000;
1044
1045 /* Check if standard changed. If so, filter calibration is needed */
1046 if (type != priv->type)
1047 need_calibration = true;
1048 else if ((type == V4L2_TUNER_ANALOG_TV) && (std != priv->std))
1049 need_calibration = true;
1050 else if ((type == V4L2_TUNER_DIGITAL_TV) &&
1051 ((delsys != priv->delsys) || bw != priv->bw))
1052 need_calibration = true;
1053 else
1054 need_calibration = false;
1055
1056 if (need_calibration) {
1057 tuner_dbg("calibrating the tuner\n");
1058 for (i = 0; i < 2; i++) {
1059 /* Set filt_cap */
1060 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x60);
1061 if (rc < 0)
1062 return rc;
1063
1064 /* set cali clk =on */
1065 rc = r820t_write_reg_mask(priv, 0x0f, 0x04, 0x04);
1066 if (rc < 0)
1067 return rc;
1068
1069 /* X'tal cap 0pF for PLL */
1070 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x03);
1071 if (rc < 0)
1072 return rc;
1073
1074 rc = r820t_set_pll(priv, type, filt_cal_lo * 1000);
1075 if (rc < 0 || !priv->has_lock)
1076 return rc;
1077
1078 /* Start Trigger */
1079 rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10);
1080 if (rc < 0)
1081 return rc;
1082
1083 usleep_range(1000, 2000);
1084
1085 /* Stop Trigger */
1086 rc = r820t_write_reg_mask(priv, 0x0b, 0x00, 0x10);
1087 if (rc < 0)
1088 return rc;
1089
1090 /* set cali clk =off */
1091 rc = r820t_write_reg_mask(priv, 0x0f, 0x00, 0x04);
1092 if (rc < 0)
1093 return rc;
1094
1095 /* Check if calibration worked */
1096 rc = r820t_read(priv, 0x00, data, sizeof(data));
1097 if (rc < 0)
1098 return rc;
1099
1100 priv->fil_cal_code = data[4] & 0x0f;
1101 if (priv->fil_cal_code && priv->fil_cal_code != 0x0f)
1102 break;
1103 }
1104 /* narrowest */
1105 if (priv->fil_cal_code == 0x0f)
1106 priv->fil_cal_code = 0;
1107 }
1108
1109 rc = r820t_write_reg_mask(priv, 0x0a,
1110 filt_q | priv->fil_cal_code, 0x1f);
1111 if (rc < 0)
1112 return rc;
1113
1114 /* Set BW, Filter_gain, & HP corner */
1115 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0xef);
1116 if (rc < 0)
1117 return rc;
1118
1119
1120 /* Set Img_R */
1121 rc = r820t_write_reg_mask(priv, 0x07, img_r, 0x80);
1122 if (rc < 0)
1123 return rc;
1124
1125 /* Set filt_3dB, V6MHz */
1126 rc = r820t_write_reg_mask(priv, 0x06, filt_gain, 0x30);
1127 if (rc < 0)
1128 return rc;
1129
1130 /* channel filter extension */
1131 rc = r820t_write_reg_mask(priv, 0x1e, ext_enable, 0x60);
1132 if (rc < 0)
1133 return rc;
1134
1135 /* Loop through */
1136 rc = r820t_write_reg_mask(priv, 0x05, loop_through, 0x80);
1137 if (rc < 0)
1138 return rc;
1139
1140 /* Loop through attenuation */
1141 rc = r820t_write_reg_mask(priv, 0x1f, lt_att, 0x80);
1142 if (rc < 0)
1143 return rc;
1144
1145 /* filter extension widest */
1146 rc = r820t_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80);
1147 if (rc < 0)
1148 return rc;
1149
1150 /* RF poly filter current */
1151 rc = r820t_write_reg_mask(priv, 0x19, polyfil_cur, 0x60);
1152 if (rc < 0)
1153 return rc;
1154
1155 /* Store current standard. If it changes, re-calibrate the tuner */
1156 priv->delsys = delsys;
1157 priv->type = type;
1158 priv->std = std;
1159 priv->bw = bw;
1160
1161 return 0;
1162 }
1163
1164 static int r820t_read_gain(struct r820t_priv *priv)
1165 {
1166 u8 data[4];
1167 int rc;
1168
1169 rc = r820t_read(priv, 0x00, data, sizeof(data));
1170 if (rc < 0)
1171 return rc;
1172
1173 return ((data[3] & 0x0f) << 1) + ((data[3] & 0xf0) >> 4);
1174 }
1175
1176 #if 0
1177 /* FIXME: This routine requires more testing */
1178 static int r820t_set_gain_mode(struct r820t_priv *priv,
1179 bool set_manual_gain,
1180 int gain)
1181 {
1182 int rc;
1183
1184 if (set_manual_gain) {
1185 int i, total_gain = 0;
1186 uint8_t mix_index = 0, lna_index = 0;
1187 u8 data[4];
1188
1189 /* LNA auto off */
1190 rc = r820t_write_reg_mask(priv, 0x05, 0x10, 0x10);
1191 if (rc < 0)
1192 return rc;
1193
1194 /* Mixer auto off */
1195 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1196 if (rc < 0)
1197 return rc;
1198
1199 rc = r820t_read(priv, 0x00, data, sizeof(data));
1200 if (rc < 0)
1201 return rc;
1202
1203 /* set fixed VGA gain for now (16.3 dB) */
1204 rc = r820t_write_reg_mask(priv, 0x0c, 0x08, 0x9f);
1205 if (rc < 0)
1206 return rc;
1207
1208 for (i = 0; i < 15; i++) {
1209 if (total_gain >= gain)
1210 break;
1211
1212 total_gain += r820t_lna_gain_steps[++lna_index];
1213
1214 if (total_gain >= gain)
1215 break;
1216
1217 total_gain += r820t_mixer_gain_steps[++mix_index];
1218 }
1219
1220 /* set LNA gain */
1221 rc = r820t_write_reg_mask(priv, 0x05, lna_index, 0x0f);
1222 if (rc < 0)
1223 return rc;
1224
1225 /* set Mixer gain */
1226 rc = r820t_write_reg_mask(priv, 0x07, mix_index, 0x0f);
1227 if (rc < 0)
1228 return rc;
1229 } else {
1230 /* LNA */
1231 rc = r820t_write_reg_mask(priv, 0x05, 0, 0x10);
1232 if (rc < 0)
1233 return rc;
1234
1235 /* Mixer */
1236 rc = r820t_write_reg_mask(priv, 0x07, 0x10, 0x10);
1237 if (rc < 0)
1238 return rc;
1239
1240 /* set fixed VGA gain for now (26.5 dB) */
1241 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1242 if (rc < 0)
1243 return rc;
1244 }
1245
1246 return 0;
1247 }
1248 #endif
1249
1250 static int generic_set_freq(struct dvb_frontend *fe,
1251 u32 freq /* in HZ */,
1252 unsigned bw,
1253 enum v4l2_tuner_type type,
1254 v4l2_std_id std, u32 delsys)
1255 {
1256 struct r820t_priv *priv = fe->tuner_priv;
1257 int rc = -EINVAL;
1258 u32 lo_freq;
1259
1260 tuner_dbg("should set frequency to %d kHz, bw %d MHz\n",
1261 freq / 1000, bw);
1262
1263 rc = r820t_set_tv_standard(priv, bw, type, std, delsys);
1264 if (rc < 0)
1265 goto err;
1266
1267 if ((type == V4L2_TUNER_ANALOG_TV) && (std == V4L2_STD_SECAM_LC))
1268 lo_freq = freq - priv->int_freq;
1269 else
1270 lo_freq = freq + priv->int_freq;
1271
1272 rc = r820t_set_mux(priv, lo_freq);
1273 if (rc < 0)
1274 goto err;
1275
1276 rc = r820t_set_pll(priv, type, lo_freq);
1277 if (rc < 0 || !priv->has_lock)
1278 goto err;
1279
1280 rc = r820t_sysfreq_sel(priv, freq, type, std, delsys);
1281 if (rc < 0)
1282 goto err;
1283
1284 tuner_dbg("%s: PLL locked on frequency %d Hz, gain=%d\n",
1285 __func__, freq, r820t_read_gain(priv));
1286
1287 err:
1288
1289 if (rc < 0)
1290 tuner_dbg("%s: failed=%d\n", __func__, rc);
1291 return rc;
1292 }
1293
1294 /*
1295 * r820t standby logic
1296 */
1297
1298 static int r820t_standby(struct r820t_priv *priv)
1299 {
1300 int rc;
1301
1302 /* If device was not initialized yet, don't need to standby */
1303 if (!priv->init_done)
1304 return 0;
1305
1306 rc = r820t_write_reg(priv, 0x06, 0xb1);
1307 if (rc < 0)
1308 return rc;
1309 rc = r820t_write_reg(priv, 0x05, 0x03);
1310 if (rc < 0)
1311 return rc;
1312 rc = r820t_write_reg(priv, 0x07, 0x3a);
1313 if (rc < 0)
1314 return rc;
1315 rc = r820t_write_reg(priv, 0x08, 0x40);
1316 if (rc < 0)
1317 return rc;
1318 rc = r820t_write_reg(priv, 0x09, 0xc0);
1319 if (rc < 0)
1320 return rc;
1321 rc = r820t_write_reg(priv, 0x0a, 0x36);
1322 if (rc < 0)
1323 return rc;
1324 rc = r820t_write_reg(priv, 0x0c, 0x35);
1325 if (rc < 0)
1326 return rc;
1327 rc = r820t_write_reg(priv, 0x0f, 0x68);
1328 if (rc < 0)
1329 return rc;
1330 rc = r820t_write_reg(priv, 0x11, 0x03);
1331 if (rc < 0)
1332 return rc;
1333 rc = r820t_write_reg(priv, 0x17, 0xf4);
1334 if (rc < 0)
1335 return rc;
1336 rc = r820t_write_reg(priv, 0x19, 0x0c);
1337
1338 /* Force initial calibration */
1339 priv->type = -1;
1340
1341 return rc;
1342 }
1343
1344 /*
1345 * r820t device init logic
1346 */
1347
1348 static int r820t_xtal_check(struct r820t_priv *priv)
1349 {
1350 int rc, i;
1351 u8 data[3], val;
1352
1353 /* Initialize the shadow registers */
1354 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1355
1356 /* cap 30pF & Drive Low */
1357 rc = r820t_write_reg_mask(priv, 0x10, 0x0b, 0x0b);
1358 if (rc < 0)
1359 return rc;
1360
1361 /* set pll autotune = 128kHz */
1362 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
1363 if (rc < 0)
1364 return rc;
1365
1366 /* set manual initial reg = 111111; */
1367 rc = r820t_write_reg_mask(priv, 0x13, 0x7f, 0x7f);
1368 if (rc < 0)
1369 return rc;
1370
1371 /* set auto */
1372 rc = r820t_write_reg_mask(priv, 0x13, 0x00, 0x40);
1373 if (rc < 0)
1374 return rc;
1375
1376 /* Try several xtal capacitor alternatives */
1377 for (i = 0; i < ARRAY_SIZE(r820t_xtal_capacitor); i++) {
1378 rc = r820t_write_reg_mask(priv, 0x10,
1379 r820t_xtal_capacitor[i][0], 0x1b);
1380 if (rc < 0)
1381 return rc;
1382
1383 usleep_range(5000, 6000);
1384
1385 rc = r820t_read(priv, 0x00, data, sizeof(data));
1386 if (rc < 0)
1387 return rc;
1388 if (!(data[2] & 0x40))
1389 continue;
1390
1391 val = data[2] & 0x3f;
1392
1393 if (priv->cfg->xtal == 16000000 && (val > 29 || val < 23))
1394 break;
1395
1396 if (val != 0x3f)
1397 break;
1398 }
1399
1400 if (i == ARRAY_SIZE(r820t_xtal_capacitor))
1401 return -EINVAL;
1402
1403 return r820t_xtal_capacitor[i][1];
1404 }
1405
1406 static int r820t_imr_prepare(struct r820t_priv *priv)
1407 {
1408 int rc;
1409
1410 /* Initialize the shadow registers */
1411 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1412
1413 /* lna off (air-in off) */
1414 rc = r820t_write_reg_mask(priv, 0x05, 0x20, 0x20);
1415 if (rc < 0)
1416 return rc;
1417
1418 /* mixer gain mode = manual */
1419 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1420 if (rc < 0)
1421 return rc;
1422
1423 /* filter corner = lowest */
1424 rc = r820t_write_reg_mask(priv, 0x0a, 0x0f, 0x0f);
1425 if (rc < 0)
1426 return rc;
1427
1428 /* filter bw=+2cap, hp=5M */
1429 rc = r820t_write_reg_mask(priv, 0x0b, 0x60, 0x6f);
1430 if (rc < 0)
1431 return rc;
1432
1433 /* adc=on, vga code mode, gain = 26.5dB */
1434 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1435 if (rc < 0)
1436 return rc;
1437
1438 /* ring clk = on */
1439 rc = r820t_write_reg_mask(priv, 0x0f, 0, 0x08);
1440 if (rc < 0)
1441 return rc;
1442
1443 /* ring power = on */
1444 rc = r820t_write_reg_mask(priv, 0x18, 0x10, 0x10);
1445 if (rc < 0)
1446 return rc;
1447
1448 /* from ring = ring pll in */
1449 rc = r820t_write_reg_mask(priv, 0x1c, 0x02, 0x02);
1450 if (rc < 0)
1451 return rc;
1452
1453 /* sw_pdect = det3 */
1454 rc = r820t_write_reg_mask(priv, 0x1e, 0x80, 0x80);
1455 if (rc < 0)
1456 return rc;
1457
1458 /* Set filt_3dB */
1459 rc = r820t_write_reg_mask(priv, 0x06, 0x20, 0x20);
1460
1461 return rc;
1462 }
1463
1464 static int r820t_multi_read(struct r820t_priv *priv)
1465 {
1466 int rc, i;
1467 u8 data[2], min = 0, max = 255, sum = 0;
1468
1469 usleep_range(5000, 6000);
1470
1471 for (i = 0; i < 6; i++) {
1472 rc = r820t_read(priv, 0x00, data, sizeof(data));
1473 if (rc < 0)
1474 return rc;
1475
1476 sum += data[1];
1477
1478 if (data[1] < min)
1479 min = data[1];
1480
1481 if (data[1] > max)
1482 max = data[1];
1483 }
1484 rc = sum - max - min;
1485
1486 return rc;
1487 }
1488
1489 static int r820t_imr_cross(struct r820t_priv *priv,
1490 struct r820t_sect_type iq_point[3],
1491 u8 *x_direct)
1492 {
1493 struct r820t_sect_type cross[5]; /* (0,0)(0,Q-1)(0,I-1)(Q-1,0)(I-1,0) */
1494 struct r820t_sect_type tmp;
1495 int i, rc;
1496 u8 reg08, reg09;
1497
1498 reg08 = r820t_read_cache_reg(priv, 8) & 0xc0;
1499 reg09 = r820t_read_cache_reg(priv, 9) & 0xc0;
1500
1501 tmp.gain_x = 0;
1502 tmp.phase_y = 0;
1503 tmp.value = 255;
1504
1505 for (i = 0; i < 5; i++) {
1506 switch (i) {
1507 case 0:
1508 cross[i].gain_x = reg08;
1509 cross[i].phase_y = reg09;
1510 break;
1511 case 1:
1512 cross[i].gain_x = reg08; /* 0 */
1513 cross[i].phase_y = reg09 + 1; /* Q-1 */
1514 break;
1515 case 2:
1516 cross[i].gain_x = reg08; /* 0 */
1517 cross[i].phase_y = (reg09 | 0x20) + 1; /* I-1 */
1518 break;
1519 case 3:
1520 cross[i].gain_x = reg08 + 1; /* Q-1 */
1521 cross[i].phase_y = reg09;
1522 break;
1523 default:
1524 cross[i].gain_x = (reg08 | 0x20) + 1; /* I-1 */
1525 cross[i].phase_y = reg09;
1526 }
1527
1528 rc = r820t_write_reg(priv, 0x08, cross[i].gain_x);
1529 if (rc < 0)
1530 return rc;
1531
1532 rc = r820t_write_reg(priv, 0x09, cross[i].phase_y);
1533 if (rc < 0)
1534 return rc;
1535
1536 rc = r820t_multi_read(priv);
1537 if (rc < 0)
1538 return rc;
1539
1540 cross[i].value = rc;
1541
1542 if (cross[i].value < tmp.value)
1543 memcpy(&tmp, &cross[i], sizeof(tmp));
1544 }
1545
1546 if ((tmp.phase_y & 0x1f) == 1) { /* y-direction */
1547 *x_direct = 0;
1548
1549 iq_point[0] = cross[0];
1550 iq_point[1] = cross[1];
1551 iq_point[2] = cross[2];
1552 } else { /* (0,0) or x-direction */
1553 *x_direct = 1;
1554
1555 iq_point[0] = cross[0];
1556 iq_point[1] = cross[3];
1557 iq_point[2] = cross[4];
1558 }
1559 return 0;
1560 }
1561
1562 static void r820t_compre_cor(struct r820t_sect_type iq[3])
1563 {
1564 int i;
1565
1566 for (i = 3; i > 0; i--) {
1567 if (iq[0].value > iq[i - 1].value)
1568 swap(iq[0], iq[i - 1]);
1569 }
1570 }
1571
1572 static int r820t_compre_step(struct r820t_priv *priv,
1573 struct r820t_sect_type iq[3], u8 reg)
1574 {
1575 int rc;
1576 struct r820t_sect_type tmp;
1577
1578 /*
1579 * Purpose: if (Gain<9 or Phase<9), Gain+1 or Phase+1 and compare
1580 * with min value:
1581 * new < min => update to min and continue
1582 * new > min => Exit
1583 */
1584
1585 /* min value already saved in iq[0] */
1586 tmp.phase_y = iq[0].phase_y;
1587 tmp.gain_x = iq[0].gain_x;
1588
1589 while (((tmp.gain_x & 0x1f) < IMR_TRIAL) &&
1590 ((tmp.phase_y & 0x1f) < IMR_TRIAL)) {
1591 if (reg == 0x08)
1592 tmp.gain_x++;
1593 else
1594 tmp.phase_y++;
1595
1596 rc = r820t_write_reg(priv, 0x08, tmp.gain_x);
1597 if (rc < 0)
1598 return rc;
1599
1600 rc = r820t_write_reg(priv, 0x09, tmp.phase_y);
1601 if (rc < 0)
1602 return rc;
1603
1604 rc = r820t_multi_read(priv);
1605 if (rc < 0)
1606 return rc;
1607 tmp.value = rc;
1608
1609 if (tmp.value <= iq[0].value) {
1610 iq[0].gain_x = tmp.gain_x;
1611 iq[0].phase_y = tmp.phase_y;
1612 iq[0].value = tmp.value;
1613 } else {
1614 return 0;
1615 }
1616
1617 }
1618
1619 return 0;
1620 }
1621
1622 static int r820t_iq_tree(struct r820t_priv *priv,
1623 struct r820t_sect_type iq[3],
1624 u8 fix_val, u8 var_val, u8 fix_reg)
1625 {
1626 int rc, i;
1627 u8 tmp, var_reg;
1628
1629 /*
1630 * record IMC results by input gain/phase location then adjust
1631 * gain or phase positive 1 step and negtive 1 step,
1632 * both record results
1633 */
1634
1635 if (fix_reg == 0x08)
1636 var_reg = 0x09;
1637 else
1638 var_reg = 0x08;
1639
1640 for (i = 0; i < 3; i++) {
1641 rc = r820t_write_reg(priv, fix_reg, fix_val);
1642 if (rc < 0)
1643 return rc;
1644
1645 rc = r820t_write_reg(priv, var_reg, var_val);
1646 if (rc < 0)
1647 return rc;
1648
1649 rc = r820t_multi_read(priv);
1650 if (rc < 0)
1651 return rc;
1652 iq[i].value = rc;
1653
1654 if (fix_reg == 0x08) {
1655 iq[i].gain_x = fix_val;
1656 iq[i].phase_y = var_val;
1657 } else {
1658 iq[i].phase_y = fix_val;
1659 iq[i].gain_x = var_val;
1660 }
1661
1662 if (i == 0) { /* try right-side point */
1663 var_val++;
1664 } else if (i == 1) { /* try left-side point */
1665 /* if absolute location is 1, change I/Q direction */
1666 if ((var_val & 0x1f) < 0x02) {
1667 tmp = 2 - (var_val & 0x1f);
1668
1669 /* b[5]:I/Q selection. 0:Q-path, 1:I-path */
1670 if (var_val & 0x20) {
1671 var_val &= 0xc0;
1672 var_val |= tmp;
1673 } else {
1674 var_val |= 0x20 | tmp;
1675 }
1676 } else {
1677 var_val -= 2;
1678 }
1679 }
1680 }
1681
1682 return 0;
1683 }
1684
1685 static int r820t_section(struct r820t_priv *priv,
1686 struct r820t_sect_type *iq_point)
1687 {
1688 int rc;
1689 struct r820t_sect_type compare_iq[3], compare_bet[3];
1690
1691 /* Try X-1 column and save min result to compare_bet[0] */
1692 if (!(iq_point->gain_x & 0x1f))
1693 compare_iq[0].gain_x = ((iq_point->gain_x) & 0xdf) + 1; /* Q-path, Gain=1 */
1694 else
1695 compare_iq[0].gain_x = iq_point->gain_x - 1; /* left point */
1696 compare_iq[0].phase_y = iq_point->phase_y;
1697
1698 /* y-direction */
1699 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1700 compare_iq[0].phase_y, 0x08);
1701 if (rc < 0)
1702 return rc;
1703
1704 r820t_compre_cor(compare_iq);
1705
1706 compare_bet[0] = compare_iq[0];
1707
1708 /* Try X column and save min result to compare_bet[1] */
1709 compare_iq[0].gain_x = iq_point->gain_x;
1710 compare_iq[0].phase_y = iq_point->phase_y;
1711
1712 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1713 compare_iq[0].phase_y, 0x08);
1714 if (rc < 0)
1715 return rc;
1716
1717 r820t_compre_cor(compare_iq);
1718
1719 compare_bet[1] = compare_iq[0];
1720
1721 /* Try X+1 column and save min result to compare_bet[2] */
1722 if ((iq_point->gain_x & 0x1f) == 0x00)
1723 compare_iq[0].gain_x = ((iq_point->gain_x) | 0x20) + 1; /* I-path, Gain=1 */
1724 else
1725 compare_iq[0].gain_x = iq_point->gain_x + 1;
1726 compare_iq[0].phase_y = iq_point->phase_y;
1727
1728 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1729 compare_iq[0].phase_y, 0x08);
1730 if (rc < 0)
1731 return rc;
1732
1733 r820t_compre_cor(compare_iq);
1734
1735 compare_bet[2] = compare_iq[0];
1736
1737 r820t_compre_cor(compare_bet);
1738
1739 *iq_point = compare_bet[0];
1740
1741 return 0;
1742 }
1743
1744 static int r820t_vga_adjust(struct r820t_priv *priv)
1745 {
1746 int rc;
1747 u8 vga_count;
1748
1749 /* increase vga power to let image significant */
1750 for (vga_count = 12; vga_count < 16; vga_count++) {
1751 rc = r820t_write_reg_mask(priv, 0x0c, vga_count, 0x0f);
1752 if (rc < 0)
1753 return rc;
1754
1755 usleep_range(10000, 11000);
1756
1757 rc = r820t_multi_read(priv);
1758 if (rc < 0)
1759 return rc;
1760
1761 if (rc > 40 * 4)
1762 break;
1763 }
1764
1765 return 0;
1766 }
1767
1768 static int r820t_iq(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1769 {
1770 struct r820t_sect_type compare_iq[3];
1771 int rc;
1772 u8 x_direction = 0; /* 1:x, 0:y */
1773 u8 dir_reg, other_reg;
1774
1775 r820t_vga_adjust(priv);
1776
1777 rc = r820t_imr_cross(priv, compare_iq, &x_direction);
1778 if (rc < 0)
1779 return rc;
1780
1781 if (x_direction == 1) {
1782 dir_reg = 0x08;
1783 other_reg = 0x09;
1784 } else {
1785 dir_reg = 0x09;
1786 other_reg = 0x08;
1787 }
1788
1789 /* compare and find min of 3 points. determine i/q direction */
1790 r820t_compre_cor(compare_iq);
1791
1792 /* increase step to find min value of this direction */
1793 rc = r820t_compre_step(priv, compare_iq, dir_reg);
1794 if (rc < 0)
1795 return rc;
1796
1797 /* the other direction */
1798 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1799 compare_iq[0].phase_y, dir_reg);
1800 if (rc < 0)
1801 return rc;
1802
1803 /* compare and find min of 3 points. determine i/q direction */
1804 r820t_compre_cor(compare_iq);
1805
1806 /* increase step to find min value on this direction */
1807 rc = r820t_compre_step(priv, compare_iq, other_reg);
1808 if (rc < 0)
1809 return rc;
1810
1811 /* check 3 points again */
1812 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1813 compare_iq[0].phase_y, other_reg);
1814 if (rc < 0)
1815 return rc;
1816
1817 r820t_compre_cor(compare_iq);
1818
1819 /* section-9 check */
1820 rc = r820t_section(priv, compare_iq);
1821
1822 *iq_pont = compare_iq[0];
1823
1824 /* reset gain/phase control setting */
1825 rc = r820t_write_reg_mask(priv, 0x08, 0, 0x3f);
1826 if (rc < 0)
1827 return rc;
1828
1829 rc = r820t_write_reg_mask(priv, 0x09, 0, 0x3f);
1830
1831 return rc;
1832 }
1833
1834 static int r820t_f_imr(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1835 {
1836 int rc;
1837
1838 r820t_vga_adjust(priv);
1839
1840 /*
1841 * search surrounding points from previous point
1842 * try (x-1), (x), (x+1) columns, and find min IMR result point
1843 */
1844 rc = r820t_section(priv, iq_pont);
1845 if (rc < 0)
1846 return rc;
1847
1848 return 0;
1849 }
1850
1851 static int r820t_imr(struct r820t_priv *priv, unsigned imr_mem, bool im_flag)
1852 {
1853 struct r820t_sect_type imr_point;
1854 int rc;
1855 u32 ring_vco, ring_freq, ring_ref;
1856 u8 n_ring, n;
1857 int reg18, reg19, reg1f;
1858
1859 if (priv->cfg->xtal > 24000000)
1860 ring_ref = priv->cfg->xtal / 2;
1861 else
1862 ring_ref = priv->cfg->xtal;
1863
1864 n_ring = 15;
1865 for (n = 0; n < 16; n++) {
1866 if ((16 + n) * 8 * ring_ref >= 3100000) {
1867 n_ring = n;
1868 break;
1869 }
1870 }
1871
1872 reg18 = r820t_read_cache_reg(priv, 0x18);
1873 reg19 = r820t_read_cache_reg(priv, 0x19);
1874 reg1f = r820t_read_cache_reg(priv, 0x1f);
1875
1876 reg18 &= 0xf0; /* set ring[3:0] */
1877 reg18 |= n_ring;
1878
1879 ring_vco = (16 + n_ring) * 8 * ring_ref;
1880
1881 reg18 &= 0xdf; /* clear ring_se23 */
1882 reg19 &= 0xfc; /* clear ring_seldiv */
1883 reg1f &= 0xfc; /* clear ring_att */
1884
1885 switch (imr_mem) {
1886 case 0:
1887 ring_freq = ring_vco / 48;
1888 reg18 |= 0x20; /* ring_se23 = 1 */
1889 reg19 |= 0x03; /* ring_seldiv = 3 */
1890 reg1f |= 0x02; /* ring_att 10 */
1891 break;
1892 case 1:
1893 ring_freq = ring_vco / 16;
1894 reg18 |= 0x00; /* ring_se23 = 0 */
1895 reg19 |= 0x02; /* ring_seldiv = 2 */
1896 reg1f |= 0x00; /* pw_ring 00 */
1897 break;
1898 case 2:
1899 ring_freq = ring_vco / 8;
1900 reg18 |= 0x00; /* ring_se23 = 0 */
1901 reg19 |= 0x01; /* ring_seldiv = 1 */
1902 reg1f |= 0x03; /* pw_ring 11 */
1903 break;
1904 case 3:
1905 ring_freq = ring_vco / 6;
1906 reg18 |= 0x20; /* ring_se23 = 1 */
1907 reg19 |= 0x00; /* ring_seldiv = 0 */
1908 reg1f |= 0x03; /* pw_ring 11 */
1909 break;
1910 case 4:
1911 ring_freq = ring_vco / 4;
1912 reg18 |= 0x00; /* ring_se23 = 0 */
1913 reg19 |= 0x00; /* ring_seldiv = 0 */
1914 reg1f |= 0x01; /* pw_ring 01 */
1915 break;
1916 default:
1917 ring_freq = ring_vco / 4;
1918 reg18 |= 0x00; /* ring_se23 = 0 */
1919 reg19 |= 0x00; /* ring_seldiv = 0 */
1920 reg1f |= 0x01; /* pw_ring 01 */
1921 break;
1922 }
1923
1924
1925 /* write pw_ring, n_ring, ringdiv2 registers */
1926
1927 /* n_ring, ring_se23 */
1928 rc = r820t_write_reg(priv, 0x18, reg18);
1929 if (rc < 0)
1930 return rc;
1931
1932 /* ring_sediv */
1933 rc = r820t_write_reg(priv, 0x19, reg19);
1934 if (rc < 0)
1935 return rc;
1936
1937 /* pw_ring */
1938 rc = r820t_write_reg(priv, 0x1f, reg1f);
1939 if (rc < 0)
1940 return rc;
1941
1942 /* mux input freq ~ rf_in freq */
1943 rc = r820t_set_mux(priv, (ring_freq - 5300) * 1000);
1944 if (rc < 0)
1945 return rc;
1946
1947 rc = r820t_set_pll(priv, V4L2_TUNER_DIGITAL_TV,
1948 (ring_freq - 5300) * 1000);
1949 if (!priv->has_lock)
1950 rc = -EINVAL;
1951 if (rc < 0)
1952 return rc;
1953
1954 if (im_flag) {
1955 rc = r820t_iq(priv, &imr_point);
1956 } else {
1957 imr_point.gain_x = priv->imr_data[3].gain_x;
1958 imr_point.phase_y = priv->imr_data[3].phase_y;
1959 imr_point.value = priv->imr_data[3].value;
1960
1961 rc = r820t_f_imr(priv, &imr_point);
1962 }
1963 if (rc < 0)
1964 return rc;
1965
1966 /* save IMR value */
1967 switch (imr_mem) {
1968 case 0:
1969 priv->imr_data[0].gain_x = imr_point.gain_x;
1970 priv->imr_data[0].phase_y = imr_point.phase_y;
1971 priv->imr_data[0].value = imr_point.value;
1972 break;
1973 case 1:
1974 priv->imr_data[1].gain_x = imr_point.gain_x;
1975 priv->imr_data[1].phase_y = imr_point.phase_y;
1976 priv->imr_data[1].value = imr_point.value;
1977 break;
1978 case 2:
1979 priv->imr_data[2].gain_x = imr_point.gain_x;
1980 priv->imr_data[2].phase_y = imr_point.phase_y;
1981 priv->imr_data[2].value = imr_point.value;
1982 break;
1983 case 3:
1984 priv->imr_data[3].gain_x = imr_point.gain_x;
1985 priv->imr_data[3].phase_y = imr_point.phase_y;
1986 priv->imr_data[3].value = imr_point.value;
1987 break;
1988 case 4:
1989 priv->imr_data[4].gain_x = imr_point.gain_x;
1990 priv->imr_data[4].phase_y = imr_point.phase_y;
1991 priv->imr_data[4].value = imr_point.value;
1992 break;
1993 default:
1994 priv->imr_data[4].gain_x = imr_point.gain_x;
1995 priv->imr_data[4].phase_y = imr_point.phase_y;
1996 priv->imr_data[4].value = imr_point.value;
1997 break;
1998 }
1999
2000 return 0;
2001 }
2002
2003 static int r820t_imr_callibrate(struct r820t_priv *priv)
2004 {
2005 int rc, i;
2006 int xtal_cap = 0;
2007
2008 if (priv->init_done)
2009 return 0;
2010
2011 /* Detect Xtal capacitance */
2012 if ((priv->cfg->rafael_chip == CHIP_R820T) ||
2013 (priv->cfg->rafael_chip == CHIP_R828S) ||
2014 (priv->cfg->rafael_chip == CHIP_R820C)) {
2015 priv->xtal_cap_sel = XTAL_HIGH_CAP_0P;
2016 } else {
2017 /* Initialize registers */
2018 rc = r820t_write(priv, 0x05,
2019 r820t_init_array, sizeof(r820t_init_array));
2020 if (rc < 0)
2021 return rc;
2022 for (i = 0; i < 3; i++) {
2023 rc = r820t_xtal_check(priv);
2024 if (rc < 0)
2025 return rc;
2026 if (!i || rc > xtal_cap)
2027 xtal_cap = rc;
2028 }
2029 priv->xtal_cap_sel = xtal_cap;
2030 }
2031
2032 /*
2033 * Disables IMR callibration. That emulates the same behaviour
2034 * as what is done by rtl-sdr userspace library. Useful for testing
2035 */
2036 if (no_imr_cal) {
2037 priv->init_done = true;
2038
2039 return 0;
2040 }
2041
2042 /* Initialize registers */
2043 rc = r820t_write(priv, 0x05,
2044 r820t_init_array, sizeof(r820t_init_array));
2045 if (rc < 0)
2046 return rc;
2047
2048 rc = r820t_imr_prepare(priv);
2049 if (rc < 0)
2050 return rc;
2051
2052 rc = r820t_imr(priv, 3, true);
2053 if (rc < 0)
2054 return rc;
2055 rc = r820t_imr(priv, 1, false);
2056 if (rc < 0)
2057 return rc;
2058 rc = r820t_imr(priv, 0, false);
2059 if (rc < 0)
2060 return rc;
2061 rc = r820t_imr(priv, 2, false);
2062 if (rc < 0)
2063 return rc;
2064 rc = r820t_imr(priv, 4, false);
2065 if (rc < 0)
2066 return rc;
2067
2068 priv->init_done = true;
2069 priv->imr_done = true;
2070
2071 return 0;
2072 }
2073
2074 #if 0
2075 /* Not used, for now */
2076 static int r820t_gpio(struct r820t_priv *priv, bool enable)
2077 {
2078 return r820t_write_reg_mask(priv, 0x0f, enable ? 1 : 0, 0x01);
2079 }
2080 #endif
2081
2082 /*
2083 * r820t frontend operations and tuner attach code
2084 *
2085 * All driver locks and i2c control are only in this part of the code
2086 */
2087
2088 static int r820t_init(struct dvb_frontend *fe)
2089 {
2090 struct r820t_priv *priv = fe->tuner_priv;
2091 int rc;
2092
2093 tuner_dbg("%s:\n", __func__);
2094
2095 mutex_lock(&priv->lock);
2096 if (fe->ops.i2c_gate_ctrl)
2097 fe->ops.i2c_gate_ctrl(fe, 1);
2098
2099 rc = r820t_imr_callibrate(priv);
2100 if (rc < 0)
2101 goto err;
2102
2103 /* Initialize registers */
2104 rc = r820t_write(priv, 0x05,
2105 r820t_init_array, sizeof(r820t_init_array));
2106
2107 err:
2108 if (fe->ops.i2c_gate_ctrl)
2109 fe->ops.i2c_gate_ctrl(fe, 0);
2110 mutex_unlock(&priv->lock);
2111
2112 if (rc < 0)
2113 tuner_dbg("%s: failed=%d\n", __func__, rc);
2114 return rc;
2115 }
2116
2117 static int r820t_sleep(struct dvb_frontend *fe)
2118 {
2119 struct r820t_priv *priv = fe->tuner_priv;
2120 int rc;
2121
2122 tuner_dbg("%s:\n", __func__);
2123
2124 mutex_lock(&priv->lock);
2125 if (fe->ops.i2c_gate_ctrl)
2126 fe->ops.i2c_gate_ctrl(fe, 1);
2127
2128 rc = r820t_standby(priv);
2129
2130 if (fe->ops.i2c_gate_ctrl)
2131 fe->ops.i2c_gate_ctrl(fe, 0);
2132 mutex_unlock(&priv->lock);
2133
2134 tuner_dbg("%s: failed=%d\n", __func__, rc);
2135 return rc;
2136 }
2137
2138 static int r820t_set_analog_freq(struct dvb_frontend *fe,
2139 struct analog_parameters *p)
2140 {
2141 struct r820t_priv *priv = fe->tuner_priv;
2142 unsigned bw;
2143 int rc;
2144
2145 tuner_dbg("%s called\n", __func__);
2146
2147 /* if std is not defined, choose one */
2148 if (!p->std)
2149 p->std = V4L2_STD_MN;
2150
2151 if ((p->std == V4L2_STD_PAL_M) || (p->std == V4L2_STD_NTSC))
2152 bw = 6;
2153 else
2154 bw = 8;
2155
2156 mutex_lock(&priv->lock);
2157 if (fe->ops.i2c_gate_ctrl)
2158 fe->ops.i2c_gate_ctrl(fe, 1);
2159
2160 rc = generic_set_freq(fe, 62500l * p->frequency, bw,
2161 V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED);
2162
2163 if (fe->ops.i2c_gate_ctrl)
2164 fe->ops.i2c_gate_ctrl(fe, 0);
2165 mutex_unlock(&priv->lock);
2166
2167 return rc;
2168 }
2169
2170 static int r820t_set_params(struct dvb_frontend *fe)
2171 {
2172 struct r820t_priv *priv = fe->tuner_priv;
2173 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2174 int rc;
2175 unsigned bw;
2176
2177 tuner_dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
2178 __func__, c->delivery_system, c->frequency, c->bandwidth_hz);
2179
2180 mutex_lock(&priv->lock);
2181 if (fe->ops.i2c_gate_ctrl)
2182 fe->ops.i2c_gate_ctrl(fe, 1);
2183
2184 bw = (c->bandwidth_hz + 500000) / 1000000;
2185 if (!bw)
2186 bw = 8;
2187
2188 rc = generic_set_freq(fe, c->frequency, bw,
2189 V4L2_TUNER_DIGITAL_TV, 0, c->delivery_system);
2190
2191 if (fe->ops.i2c_gate_ctrl)
2192 fe->ops.i2c_gate_ctrl(fe, 0);
2193 mutex_unlock(&priv->lock);
2194
2195 if (rc)
2196 tuner_dbg("%s: failed=%d\n", __func__, rc);
2197 return rc;
2198 }
2199
2200 static int r820t_signal(struct dvb_frontend *fe, u16 *strength)
2201 {
2202 struct r820t_priv *priv = fe->tuner_priv;
2203 int rc = 0;
2204
2205 mutex_lock(&priv->lock);
2206 if (fe->ops.i2c_gate_ctrl)
2207 fe->ops.i2c_gate_ctrl(fe, 1);
2208
2209 if (priv->has_lock) {
2210 rc = r820t_read_gain(priv);
2211 if (rc < 0)
2212 goto err;
2213
2214 /* A higher gain at LNA means a lower signal strength */
2215 *strength = (45 - rc) << 4 | 0xff;
2216 if (*strength == 0xff)
2217 *strength = 0;
2218 } else {
2219 *strength = 0;
2220 }
2221
2222 err:
2223 if (fe->ops.i2c_gate_ctrl)
2224 fe->ops.i2c_gate_ctrl(fe, 0);
2225 mutex_unlock(&priv->lock);
2226
2227 tuner_dbg("%s: %s, gain=%d strength=%d\n",
2228 __func__,
2229 priv->has_lock ? "PLL locked" : "no signal",
2230 rc, *strength);
2231
2232 return 0;
2233 }
2234
2235 static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
2236 {
2237 struct r820t_priv *priv = fe->tuner_priv;
2238
2239 tuner_dbg("%s:\n", __func__);
2240
2241 *frequency = priv->int_freq;
2242
2243 return 0;
2244 }
2245
2246 static int r820t_release(struct dvb_frontend *fe)
2247 {
2248 struct r820t_priv *priv = fe->tuner_priv;
2249
2250 tuner_dbg("%s:\n", __func__);
2251
2252 mutex_lock(&r820t_list_mutex);
2253
2254 if (priv)
2255 hybrid_tuner_release_state(priv);
2256
2257 mutex_unlock(&r820t_list_mutex);
2258
2259 kfree(fe->tuner_priv);
2260 fe->tuner_priv = NULL;
2261
2262 return 0;
2263 }
2264
2265 static const struct dvb_tuner_ops r820t_tuner_ops = {
2266 .info = {
2267 .name = "Rafael Micro R820T",
2268 .frequency_min = 42000000,
2269 .frequency_max = 1002000000,
2270 },
2271 .init = r820t_init,
2272 .release = r820t_release,
2273 .sleep = r820t_sleep,
2274 .set_params = r820t_set_params,
2275 .set_analog_params = r820t_set_analog_freq,
2276 .get_if_frequency = r820t_get_if_frequency,
2277 .get_rf_strength = r820t_signal,
2278 };
2279
2280 struct dvb_frontend *r820t_attach(struct dvb_frontend *fe,
2281 struct i2c_adapter *i2c,
2282 const struct r820t_config *cfg)
2283 {
2284 struct r820t_priv *priv;
2285 int rc = -ENODEV;
2286 u8 data[5];
2287 int instance;
2288
2289 mutex_lock(&r820t_list_mutex);
2290
2291 instance = hybrid_tuner_request_state(struct r820t_priv, priv,
2292 hybrid_tuner_instance_list,
2293 i2c, cfg->i2c_addr,
2294 "r820t");
2295 switch (instance) {
2296 case 0:
2297 /* memory allocation failure */
2298 goto err_no_gate;
2299 break;
2300 case 1:
2301 /* new tuner instance */
2302 priv->cfg = cfg;
2303
2304 mutex_init(&priv->lock);
2305
2306 fe->tuner_priv = priv;
2307 break;
2308 case 2:
2309 /* existing tuner instance */
2310 fe->tuner_priv = priv;
2311 break;
2312 }
2313
2314 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops, sizeof(r820t_tuner_ops));
2315
2316 if (fe->ops.i2c_gate_ctrl)
2317 fe->ops.i2c_gate_ctrl(fe, 1);
2318
2319 /* check if the tuner is there */
2320 rc = r820t_read(priv, 0x00, data, sizeof(data));
2321 if (rc < 0)
2322 goto err;
2323
2324 rc = r820t_sleep(fe);
2325 if (rc < 0)
2326 goto err;
2327
2328 tuner_info("Rafael Micro r820t successfully identified\n");
2329
2330 fe->tuner_priv = priv;
2331 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops,
2332 sizeof(struct dvb_tuner_ops));
2333
2334 if (fe->ops.i2c_gate_ctrl)
2335 fe->ops.i2c_gate_ctrl(fe, 0);
2336
2337 mutex_unlock(&r820t_list_mutex);
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");
Linux kernel - Deliverables
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