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[media] r820t: Don't put it in standby if not initialized yet
[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 #include <asm/div64.h>
40
41 #include "tuner-i2c.h"
42 #include "r820t.h"
43
44 /*
45 * FIXME: I think that there are only 32 registers, but better safe than
46 * sorry. After finishing the driver, we may review it.
47 */
48 #define REG_SHADOW_START 5
49 #define NUM_REGS 27
50 #define NUM_IMR 5
51 #define IMR_TRIAL 9
52
53 #define VER_NUM 49
54
55 static int debug;
56 module_param(debug, int, 0644);
57 MODULE_PARM_DESC(debug, "enable verbose debug messages");
58
59 static int no_imr_cal;
60 module_param(no_imr_cal, int, 0444);
61 MODULE_PARM_DESC(no_imr_cal, "Disable IMR calibration at module init");
62
63
64 /*
65 * enums and structures
66 */
67
68 enum xtal_cap_value {
69 XTAL_LOW_CAP_30P = 0,
70 XTAL_LOW_CAP_20P,
71 XTAL_LOW_CAP_10P,
72 XTAL_LOW_CAP_0P,
73 XTAL_HIGH_CAP_0P
74 };
75
76 struct r820t_sect_type {
77 u8 phase_y;
78 u8 gain_x;
79 u16 value;
80 };
81
82 struct r820t_priv {
83 struct list_head hybrid_tuner_instance_list;
84 const struct r820t_config *cfg;
85 struct tuner_i2c_props i2c_props;
86 struct mutex lock;
87
88 u8 regs[NUM_REGS];
89 u8 buf[NUM_REGS + 1];
90 enum xtal_cap_value xtal_cap_sel;
91 u16 pll; /* kHz */
92 u32 int_freq;
93 u8 fil_cal_code;
94 bool imr_done;
95 bool has_lock;
96 bool init_done;
97 struct r820t_sect_type imr_data[NUM_IMR];
98
99 /* Store current mode */
100 u32 delsys;
101 enum v4l2_tuner_type type;
102 v4l2_std_id std;
103 u32 bw; /* in MHz */
104 };
105
106 struct r820t_freq_range {
107 u32 freq;
108 u8 open_d;
109 u8 rf_mux_ploy;
110 u8 tf_c;
111 u8 xtal_cap20p;
112 u8 xtal_cap10p;
113 u8 xtal_cap0p;
114 u8 imr_mem; /* Not used, currently */
115 };
116
117 #define VCO_POWER_REF 0x02
118 #define DIP_FREQ 32000000
119
120 /*
121 * Static constants
122 */
123
124 static LIST_HEAD(hybrid_tuner_instance_list);
125 static DEFINE_MUTEX(r820t_list_mutex);
126
127 /* Those initial values start from REG_SHADOW_START */
128 static const u8 r820t_init_array[NUM_REGS] = {
129 0x83, 0x32, 0x75, /* 05 to 07 */
130 0xc0, 0x40, 0xd6, 0x6c, /* 08 to 0b */
131 0xf5, 0x63, 0x75, 0x68, /* 0c to 0f */
132 0x6c, 0x83, 0x80, 0x00, /* 10 to 13 */
133 0x0f, 0x00, 0xc0, 0x30, /* 14 to 17 */
134 0x48, 0xcc, 0x60, 0x00, /* 18 to 1b */
135 0x54, 0xae, 0x4a, 0xc0 /* 1c to 1f */
136 };
137
138 /* Tuner frequency ranges */
139 static const struct r820t_freq_range freq_ranges[] = {
140 {
141 .freq = 0,
142 .open_d = 0x08, /* low */
143 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
144 .tf_c = 0xdf, /* R27[7:0] band2,band0 */
145 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
146 .xtal_cap10p = 0x01,
147 .xtal_cap0p = 0x00,
148 .imr_mem = 0,
149 }, {
150 .freq = 50, /* Start freq, in MHz */
151 .open_d = 0x08, /* low */
152 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
153 .tf_c = 0xbe, /* R27[7:0] band4,band1 */
154 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
155 .xtal_cap10p = 0x01,
156 .xtal_cap0p = 0x00,
157 .imr_mem = 0,
158 }, {
159 .freq = 55, /* Start freq, in MHz */
160 .open_d = 0x08, /* low */
161 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
162 .tf_c = 0x8b, /* R27[7:0] band7,band4 */
163 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
164 .xtal_cap10p = 0x01,
165 .xtal_cap0p = 0x00,
166 .imr_mem = 0,
167 }, {
168 .freq = 60, /* Start freq, in MHz */
169 .open_d = 0x08, /* low */
170 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
171 .tf_c = 0x7b, /* R27[7:0] band8,band4 */
172 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
173 .xtal_cap10p = 0x01,
174 .xtal_cap0p = 0x00,
175 .imr_mem = 0,
176 }, {
177 .freq = 65, /* Start freq, in MHz */
178 .open_d = 0x08, /* low */
179 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
180 .tf_c = 0x69, /* R27[7:0] band9,band6 */
181 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
182 .xtal_cap10p = 0x01,
183 .xtal_cap0p = 0x00,
184 .imr_mem = 0,
185 }, {
186 .freq = 70, /* Start freq, in MHz */
187 .open_d = 0x08, /* low */
188 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
189 .tf_c = 0x58, /* R27[7:0] band10,band7 */
190 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
191 .xtal_cap10p = 0x01,
192 .xtal_cap0p = 0x00,
193 .imr_mem = 0,
194 }, {
195 .freq = 75, /* Start freq, in MHz */
196 .open_d = 0x00, /* high */
197 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
198 .tf_c = 0x44, /* R27[7:0] band11,band11 */
199 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
200 .xtal_cap10p = 0x01,
201 .xtal_cap0p = 0x00,
202 .imr_mem = 0,
203 }, {
204 .freq = 80, /* Start freq, in MHz */
205 .open_d = 0x00, /* high */
206 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
207 .tf_c = 0x44, /* R27[7:0] band11,band11 */
208 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */
209 .xtal_cap10p = 0x01,
210 .xtal_cap0p = 0x00,
211 .imr_mem = 0,
212 }, {
213 .freq = 90, /* Start freq, in MHz */
214 .open_d = 0x00, /* high */
215 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
216 .tf_c = 0x34, /* R27[7:0] band12,band11 */
217 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
218 .xtal_cap10p = 0x01,
219 .xtal_cap0p = 0x00,
220 .imr_mem = 0,
221 }, {
222 .freq = 100, /* Start freq, in MHz */
223 .open_d = 0x00, /* high */
224 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
225 .tf_c = 0x34, /* R27[7:0] band12,band11 */
226 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
227 .xtal_cap10p = 0x01,
228 .xtal_cap0p = 0x00,
229 .imr_mem = 0,
230 }, {
231 .freq = 110, /* Start freq, in MHz */
232 .open_d = 0x00, /* high */
233 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
234 .tf_c = 0x24, /* R27[7:0] band13,band11 */
235 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
236 .xtal_cap10p = 0x01,
237 .xtal_cap0p = 0x00,
238 .imr_mem = 1,
239 }, {
240 .freq = 120, /* Start freq, in MHz */
241 .open_d = 0x00, /* high */
242 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
243 .tf_c = 0x24, /* R27[7:0] band13,band11 */
244 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
245 .xtal_cap10p = 0x01,
246 .xtal_cap0p = 0x00,
247 .imr_mem = 1,
248 }, {
249 .freq = 140, /* Start freq, in MHz */
250 .open_d = 0x00, /* high */
251 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
252 .tf_c = 0x14, /* R27[7:0] band14,band11 */
253 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */
254 .xtal_cap10p = 0x01,
255 .xtal_cap0p = 0x00,
256 .imr_mem = 1,
257 }, {
258 .freq = 180, /* Start freq, in MHz */
259 .open_d = 0x00, /* high */
260 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
261 .tf_c = 0x13, /* R27[7:0] band14,band12 */
262 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
263 .xtal_cap10p = 0x00,
264 .xtal_cap0p = 0x00,
265 .imr_mem = 1,
266 }, {
267 .freq = 220, /* Start freq, in MHz */
268 .open_d = 0x00, /* high */
269 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
270 .tf_c = 0x13, /* R27[7:0] band14,band12 */
271 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
272 .xtal_cap10p = 0x00,
273 .xtal_cap0p = 0x00,
274 .imr_mem = 2,
275 }, {
276 .freq = 250, /* Start freq, in MHz */
277 .open_d = 0x00, /* high */
278 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
279 .tf_c = 0x11, /* R27[7:0] highest,highest */
280 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
281 .xtal_cap10p = 0x00,
282 .xtal_cap0p = 0x00,
283 .imr_mem = 2,
284 }, {
285 .freq = 280, /* Start freq, in MHz */
286 .open_d = 0x00, /* high */
287 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
288 .tf_c = 0x00, /* R27[7:0] highest,highest */
289 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
290 .xtal_cap10p = 0x00,
291 .xtal_cap0p = 0x00,
292 .imr_mem = 2,
293 }, {
294 .freq = 310, /* Start freq, in MHz */
295 .open_d = 0x00, /* high */
296 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
297 .tf_c = 0x00, /* R27[7:0] highest,highest */
298 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
299 .xtal_cap10p = 0x00,
300 .xtal_cap0p = 0x00,
301 .imr_mem = 2,
302 }, {
303 .freq = 450, /* Start freq, in MHz */
304 .open_d = 0x00, /* high */
305 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
306 .tf_c = 0x00, /* R27[7:0] highest,highest */
307 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
308 .xtal_cap10p = 0x00,
309 .xtal_cap0p = 0x00,
310 .imr_mem = 3,
311 }, {
312 .freq = 588, /* Start freq, in MHz */
313 .open_d = 0x00, /* high */
314 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
315 .tf_c = 0x00, /* R27[7:0] highest,highest */
316 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
317 .xtal_cap10p = 0x00,
318 .xtal_cap0p = 0x00,
319 .imr_mem = 3,
320 }, {
321 .freq = 650, /* Start freq, in MHz */
322 .open_d = 0x00, /* high */
323 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
324 .tf_c = 0x00, /* R27[7:0] highest,highest */
325 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */
326 .xtal_cap10p = 0x00,
327 .xtal_cap0p = 0x00,
328 .imr_mem = 4,
329 }
330 };
331
332 static int r820t_xtal_capacitor[][2] = {
333 { 0x0b, XTAL_LOW_CAP_30P },
334 { 0x02, XTAL_LOW_CAP_20P },
335 { 0x01, XTAL_LOW_CAP_10P },
336 { 0x00, XTAL_LOW_CAP_0P },
337 { 0x10, XTAL_HIGH_CAP_0P },
338 };
339
340 /*
341 * measured with a Racal 6103E GSM test set at 928 MHz with -60 dBm
342 * input power, for raw results see:
343 * http://steve-m.de/projects/rtl-sdr/gain_measurement/r820t/
344 */
345
346 static const int r820t_lna_gain_steps[] = {
347 0, 9, 13, 40, 38, 13, 31, 22, 26, 31, 26, 14, 19, 5, 35, 13
348 };
349
350 static const int r820t_mixer_gain_steps[] = {
351 0, 5, 10, 10, 19, 9, 10, 25, 17, 10, 8, 16, 13, 6, 3, -8
352 };
353
354 /*
355 * I2C read/write code and shadow registers logic
356 */
357 static void shadow_store(struct r820t_priv *priv, u8 reg, const u8 *val,
358 int len)
359 {
360 int r = reg - REG_SHADOW_START;
361
362 if (r < 0) {
363 len += r;
364 r = 0;
365 }
366 if (len <= 0)
367 return;
368 if (len > NUM_REGS)
369 len = NUM_REGS;
370
371 tuner_dbg("%s: prev reg=%02x len=%d: %*ph\n",
372 __func__, r + REG_SHADOW_START, len, len, val);
373
374 memcpy(&priv->regs[r], val, len);
375 }
376
377 static int r820t_write(struct r820t_priv *priv, u8 reg, const u8 *val,
378 int len)
379 {
380 int rc, size, pos = 0;
381
382 /* Store the shadow registers */
383 shadow_store(priv, reg, val, len);
384
385 do {
386 if (len > priv->cfg->max_i2c_msg_len - 1)
387 size = priv->cfg->max_i2c_msg_len - 1;
388 else
389 size = len;
390
391 /* Fill I2C buffer */
392 priv->buf[0] = reg;
393 memcpy(&priv->buf[1], &val[pos], size);
394
395 rc = tuner_i2c_xfer_send(&priv->i2c_props, priv->buf, size + 1);
396 if (rc != size + 1) {
397 tuner_info("%s: i2c wr failed=%d reg=%02x len=%d: %*ph\n",
398 __func__, rc, reg, size, size, &priv->buf[1]);
399 if (rc < 0)
400 return rc;
401 return -EREMOTEIO;
402 }
403 tuner_dbg("%s: i2c wr reg=%02x len=%d: %*ph\n",
404 __func__, reg, size, size, &priv->buf[1]);
405
406 reg += size;
407 len -= size;
408 pos += size;
409 } while (len > 0);
410
411 return 0;
412 }
413
414 static int r820t_write_reg(struct r820t_priv *priv, u8 reg, u8 val)
415 {
416 return r820t_write(priv, reg, &val, 1);
417 }
418
419 static int r820t_read_cache_reg(struct r820t_priv *priv, int reg)
420 {
421 reg -= REG_SHADOW_START;
422
423 if (reg >= 0 && reg < NUM_REGS)
424 return priv->regs[reg];
425 else
426 return -EINVAL;
427 }
428
429 static int r820t_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val,
430 u8 bit_mask)
431 {
432 int rc = r820t_read_cache_reg(priv, reg);
433
434 if (rc < 0)
435 return rc;
436
437 val = (rc & ~bit_mask) | (val & bit_mask);
438
439 return r820t_write(priv, reg, &val, 1);
440 }
441
442 static int r820t_read(struct r820t_priv *priv, u8 reg, u8 *val, int len)
443 {
444 int rc, i;
445 u8 *p = &priv->buf[1];
446
447 priv->buf[0] = reg;
448
449 rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, priv->buf, 1, p, len);
450 if (rc != len) {
451 tuner_info("%s: i2c rd failed=%d reg=%02x len=%d: %*ph\n",
452 __func__, rc, reg, len, len, p);
453 if (rc < 0)
454 return rc;
455 return -EREMOTEIO;
456 }
457
458 /* Copy data to the output buffer */
459 for (i = 0; i < len; i++)
460 val[i] = bitrev8(p[i]);
461
462 tuner_dbg("%s: i2c rd reg=%02x len=%d: %*ph\n",
463 __func__, reg, len, len, val);
464
465 return 0;
466 }
467
468 /*
469 * r820t tuning logic
470 */
471
472 static int r820t_set_mux(struct r820t_priv *priv, u32 freq)
473 {
474 const struct r820t_freq_range *range;
475 int i, rc;
476 u8 val, reg08, reg09;
477
478 /* Get the proper frequency range */
479 freq = freq / 1000000;
480 for (i = 0; i < ARRAY_SIZE(freq_ranges) - 1; i++) {
481 if (freq < freq_ranges[i + 1].freq)
482 break;
483 }
484 range = &freq_ranges[i];
485
486 tuner_dbg("set r820t range#%d for frequency %d MHz\n", i, freq);
487
488 /* Open Drain */
489 rc = r820t_write_reg_mask(priv, 0x17, range->open_d, 0x08);
490 if (rc < 0)
491 return rc;
492
493 /* RF_MUX,Polymux */
494 rc = r820t_write_reg_mask(priv, 0x1a, range->rf_mux_ploy, 0xc3);
495 if (rc < 0)
496 return rc;
497
498 /* TF BAND */
499 rc = r820t_write_reg(priv, 0x1b, range->tf_c);
500 if (rc < 0)
501 return rc;
502
503 /* XTAL CAP & Drive */
504 switch (priv->xtal_cap_sel) {
505 case XTAL_LOW_CAP_30P:
506 case XTAL_LOW_CAP_20P:
507 val = range->xtal_cap20p | 0x08;
508 break;
509 case XTAL_LOW_CAP_10P:
510 val = range->xtal_cap10p | 0x08;
511 break;
512 case XTAL_HIGH_CAP_0P:
513 val = range->xtal_cap0p | 0x00;
514 break;
515 default:
516 case XTAL_LOW_CAP_0P:
517 val = range->xtal_cap0p | 0x08;
518 break;
519 }
520 rc = r820t_write_reg_mask(priv, 0x10, val, 0x0b);
521 if (rc < 0)
522 return rc;
523
524 if (priv->imr_done) {
525 reg08 = priv->imr_data[range->imr_mem].gain_x;
526 reg09 = priv->imr_data[range->imr_mem].phase_y;
527 } else {
528 reg08 = 0;
529 reg09 = 0;
530 }
531 rc = r820t_write_reg_mask(priv, 0x08, reg08, 0x3f);
532 if (rc < 0)
533 return rc;
534
535 rc = r820t_write_reg_mask(priv, 0x09, reg09, 0x3f);
536
537 return rc;
538 }
539
540 static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type,
541 u32 freq)
542 {
543 u64 tmp64, vco_freq;
544 int rc, i;
545 unsigned sleep_time = 10000;
546 u32 vco_fra; /* VCO contribution by SDM (kHz) */
547 u32 vco_min = 1770000;
548 u32 vco_max = vco_min * 2;
549 u32 pll_ref;
550 u16 n_sdm = 2;
551 u16 sdm = 0;
552 u8 mix_div = 2;
553 u8 div_buf = 0;
554 u8 div_num = 0;
555 u8 refdiv2 = 0;
556 u8 ni, si, nint, vco_fine_tune, val;
557 u8 data[5];
558
559 /* Frequency in kHz */
560 freq = freq / 1000;
561 pll_ref = priv->cfg->xtal / 1000;
562
563 if ((priv->cfg->rafael_chip == CHIP_R620D) ||
564 (priv->cfg->rafael_chip == CHIP_R828D) ||
565 (priv->cfg->rafael_chip == CHIP_R828)) {
566 /* ref set refdiv2, reffreq = Xtal/2 on ATV application */
567 if (type != V4L2_TUNER_DIGITAL_TV) {
568 pll_ref /= 2;
569 refdiv2 = 0x10;
570 sleep_time = 20000;
571 }
572 } else {
573 if (priv->cfg->xtal > 24000000) {
574 pll_ref /= 2;
575 refdiv2 = 0x10;
576 }
577 }
578
579 tuner_dbg("set r820t pll for frequency %d kHz = %d%s\n",
580 freq, pll_ref, refdiv2 ? " / 2" : "");
581
582 rc = r820t_write_reg_mask(priv, 0x10, refdiv2, 0x10);
583 if (rc < 0)
584 return rc;
585
586 /* set pll autotune = 128kHz */
587 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
588 if (rc < 0)
589 return rc;
590
591 /* set VCO current = 100 */
592 rc = r820t_write_reg_mask(priv, 0x12, 0x80, 0xe0);
593 if (rc < 0)
594 return rc;
595
596 /* Calculate divider */
597 while (mix_div <= 64) {
598 if (((freq * mix_div) >= vco_min) &&
599 ((freq * mix_div) < vco_max)) {
600 div_buf = mix_div;
601 while (div_buf > 2) {
602 div_buf = div_buf >> 1;
603 div_num++;
604 }
605 break;
606 }
607 mix_div = mix_div << 1;
608 }
609
610 rc = r820t_read(priv, 0x00, data, sizeof(data));
611 if (rc < 0)
612 return rc;
613
614 vco_fine_tune = (data[4] & 0x30) >> 4;
615
616 if (vco_fine_tune > VCO_POWER_REF)
617 div_num = div_num - 1;
618 else if (vco_fine_tune < VCO_POWER_REF)
619 div_num = div_num + 1;
620
621 rc = r820t_write_reg_mask(priv, 0x10, div_num << 5, 0xe0);
622 if (rc < 0)
623 return rc;
624
625 vco_freq = (u64)(freq * (u64)mix_div);
626
627 tmp64 = vco_freq;
628 do_div(tmp64, 2 * pll_ref);
629 nint = (u8)tmp64;
630
631 tmp64 = vco_freq - ((u64)2) * pll_ref * nint;
632 do_div(tmp64, 1000);
633 vco_fra = (u16)(tmp64);
634
635 /* boundary spur prevention */
636 if (vco_fra < pll_ref / 64) {
637 vco_fra = 0;
638 } else if (vco_fra > pll_ref * 127 / 64) {
639 vco_fra = 0;
640 nint++;
641 } else if ((vco_fra > pll_ref * 127 / 128) && (vco_fra < pll_ref)) {
642 vco_fra = pll_ref * 127 / 128;
643 } else if ((vco_fra > pll_ref) && (vco_fra < pll_ref * 129 / 128)) {
644 vco_fra = pll_ref * 129 / 128;
645 }
646
647 if (nint > 63) {
648 tuner_info("No valid PLL values for %u kHz!\n", freq);
649 return -EINVAL;
650 }
651
652 ni = (nint - 13) / 4;
653 si = nint - 4 * ni - 13;
654
655 rc = r820t_write_reg(priv, 0x14, ni + (si << 6));
656 if (rc < 0)
657 return rc;
658
659 /* pw_sdm */
660 if (!vco_fra)
661 val = 0x08;
662 else
663 val = 0x00;
664
665 rc = r820t_write_reg_mask(priv, 0x12, val, 0x08);
666 if (rc < 0)
667 return rc;
668
669 /* sdm calculator */
670 while (vco_fra > 1) {
671 if (vco_fra > (2 * pll_ref / n_sdm)) {
672 sdm = sdm + 32768 / (n_sdm / 2);
673 vco_fra = vco_fra - 2 * pll_ref / n_sdm;
674 if (n_sdm >= 0x8000)
675 break;
676 }
677 n_sdm = n_sdm << 1;
678 }
679
680 rc = r820t_write_reg_mask(priv, 0x16, sdm >> 8, 0x08);
681 if (rc < 0)
682 return rc;
683 rc = r820t_write_reg_mask(priv, 0x15, sdm & 0xff, 0x08);
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 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7);
805 if (rc < 0)
806 return rc;
807 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0xf8);
808 if (rc < 0)
809 return rc;
810 rc = r820t_write_reg(priv, 0x0d, lna_vth_l);
811 if (rc < 0)
812 return rc;
813 rc = r820t_write_reg(priv, 0x0e, mixer_vth_l);
814 if (rc < 0)
815 return rc;
816
817 /* Air-IN only for Astrometa */
818 rc = r820t_write_reg_mask(priv, 0x05, air_cable1_in, 0x60);
819 if (rc < 0)
820 return rc;
821 rc = r820t_write_reg_mask(priv, 0x06, cable2_in, 0x08);
822 if (rc < 0)
823 return rc;
824
825 rc = r820t_write_reg_mask(priv, 0x11, cp_cur, 0x38);
826 if (rc < 0)
827 return rc;
828 rc = r820t_write_reg_mask(priv, 0x17, div_buf_cur, 0x30);
829 if (rc < 0)
830 return rc;
831 rc = r820t_write_reg_mask(priv, 0x0a, filter_cur, 0x60);
832 if (rc < 0)
833 return rc;
834 /*
835 * Original driver initializes regs 0x05 and 0x06 with the
836 * same value again on this point. Probably, it is just an
837 * error there
838 */
839
840 /*
841 * Set LNA
842 */
843
844 tuner_dbg("adjusting LNA parameters\n");
845 if (type != V4L2_TUNER_ANALOG_TV) {
846 /* LNA TOP: lowest */
847 rc = r820t_write_reg_mask(priv, 0x1d, 0, 0x38);
848 if (rc < 0)
849 return rc;
850
851 /* 0: normal mode */
852 rc = r820t_write_reg_mask(priv, 0x1c, 0, 0x04);
853 if (rc < 0)
854 return rc;
855
856 /* 0: PRE_DECT off */
857 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
858 if (rc < 0)
859 return rc;
860
861 /* agc clk 250hz */
862 rc = r820t_write_reg_mask(priv, 0x1a, 0x30, 0x30);
863 if (rc < 0)
864 return rc;
865
866 msleep(250);
867
868 /* write LNA TOP = 3 */
869 rc = r820t_write_reg_mask(priv, 0x1d, 0x18, 0x38);
870 if (rc < 0)
871 return rc;
872
873 /*
874 * write discharge mode
875 * FIXME: IMHO, the mask here is wrong, but it matches
876 * what's there at the original driver
877 */
878 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
879 if (rc < 0)
880 return rc;
881
882 /* LNA discharge current */
883 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
884 if (rc < 0)
885 return rc;
886
887 /* agc clk 60hz */
888 rc = r820t_write_reg_mask(priv, 0x1a, 0x20, 0x30);
889 if (rc < 0)
890 return rc;
891 } else {
892 /* PRE_DECT off */
893 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40);
894 if (rc < 0)
895 return rc;
896
897 /* write LNA TOP */
898 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0x38);
899 if (rc < 0)
900 return rc;
901
902 /*
903 * write discharge mode
904 * FIXME: IMHO, the mask here is wrong, but it matches
905 * what's there at the original driver
906 */
907 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
908 if (rc < 0)
909 return rc;
910
911 /* LNA discharge current */
912 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
913 if (rc < 0)
914 return rc;
915
916 /* agc clk 1Khz, external det1 cap 1u */
917 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x30);
918 if (rc < 0)
919 return rc;
920
921 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x04);
922 if (rc < 0)
923 return rc;
924 }
925 return 0;
926 }
927
928 static int r820t_set_tv_standard(struct r820t_priv *priv,
929 unsigned bw,
930 enum v4l2_tuner_type type,
931 v4l2_std_id std, u32 delsys)
932
933 {
934 int rc, i;
935 u32 if_khz, filt_cal_lo;
936 u8 data[5], val;
937 u8 filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through;
938 u8 lt_att, flt_ext_widest, polyfil_cur;
939 bool need_calibration;
940
941 tuner_dbg("selecting the delivery system\n");
942
943 if (delsys == SYS_ISDBT) {
944 if_khz = 4063;
945 filt_cal_lo = 59000;
946 filt_gain = 0x10; /* +3db, 6mhz on */
947 img_r = 0x00; /* image negative */
948 filt_q = 0x10; /* r10[4]:low q(1'b1) */
949 hp_cor = 0x6a; /* 1.7m disable, +2cap, 1.25mhz */
950 ext_enable = 0x40; /* r30[6], ext enable; r30[5]:0 ext at lna max */
951 loop_through = 0x00; /* r5[7], lt on */
952 lt_att = 0x00; /* r31[7], lt att enable */
953 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
954 polyfil_cur = 0x60; /* r25[6:5]:min */
955 } else {
956 if (bw <= 6) {
957 if_khz = 3570;
958 filt_cal_lo = 56000; /* 52000->56000 */
959 filt_gain = 0x10; /* +3db, 6mhz on */
960 img_r = 0x00; /* image negative */
961 filt_q = 0x10; /* r10[4]:low q(1'b1) */
962 hp_cor = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */
963 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
964 loop_through = 0x00; /* r5[7], lt on */
965 lt_att = 0x00; /* r31[7], lt att enable */
966 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
967 polyfil_cur = 0x60; /* r25[6:5]:min */
968 } else if (bw == 7) {
969 #if 0
970 /*
971 * There are two 7 MHz tables defined on the original
972 * driver, but just the second one seems to be visible
973 * by rtl2832. Keep this one here commented, as it
974 * might be needed in the future
975 */
976
977 if_khz = 4070;
978 filt_cal_lo = 60000;
979 filt_gain = 0x10; /* +3db, 6mhz on */
980 img_r = 0x00; /* image negative */
981 filt_q = 0x10; /* r10[4]:low q(1'b1) */
982 hp_cor = 0x2b; /* 1.7m disable, +1cap, 1.0mhz */
983 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
984 loop_through = 0x00; /* r5[7], lt on */
985 lt_att = 0x00; /* r31[7], lt att enable */
986 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
987 polyfil_cur = 0x60; /* r25[6:5]:min */
988 #endif
989 /* 7 MHz, second table */
990 if_khz = 4570;
991 filt_cal_lo = 63000;
992 filt_gain = 0x10; /* +3db, 6mhz on */
993 img_r = 0x00; /* image negative */
994 filt_q = 0x10; /* r10[4]:low q(1'b1) */
995 hp_cor = 0x2a; /* 1.7m disable, +1cap, 1.25mhz */
996 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
997 loop_through = 0x00; /* r5[7], lt on */
998 lt_att = 0x00; /* r31[7], lt att enable */
999 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1000 polyfil_cur = 0x60; /* r25[6:5]:min */
1001 } else {
1002 if_khz = 4570;
1003 filt_cal_lo = 68500;
1004 filt_gain = 0x10; /* +3db, 6mhz on */
1005 img_r = 0x00; /* image negative */
1006 filt_q = 0x10; /* r10[4]:low q(1'b1) */
1007 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */
1008 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
1009 loop_through = 0x00; /* r5[7], lt on */
1010 lt_att = 0x00; /* r31[7], lt att enable */
1011 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
1012 polyfil_cur = 0x60; /* r25[6:5]:min */
1013 }
1014 }
1015
1016 /* Initialize the shadow registers */
1017 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1018
1019 /* Init Flag & Xtal_check Result */
1020 if (priv->imr_done)
1021 val = 1 | priv->xtal_cap_sel << 1;
1022 else
1023 val = 0;
1024 rc = r820t_write_reg_mask(priv, 0x0c, val, 0x0f);
1025 if (rc < 0)
1026 return rc;
1027
1028 /* version */
1029 rc = r820t_write_reg_mask(priv, 0x13, VER_NUM, 0x3f);
1030 if (rc < 0)
1031 return rc;
1032
1033 /* for LT Gain test */
1034 if (type != V4L2_TUNER_ANALOG_TV) {
1035 rc = r820t_write_reg_mask(priv, 0x1d, 0x00, 0x38);
1036 if (rc < 0)
1037 return rc;
1038 usleep_range(1000, 2000);
1039 }
1040 priv->int_freq = if_khz * 1000;
1041
1042 /* Check if standard changed. If so, filter calibration is needed */
1043 if (type != priv->type)
1044 need_calibration = true;
1045 else if ((type == V4L2_TUNER_ANALOG_TV) && (std != priv->std))
1046 need_calibration = true;
1047 else if ((type == V4L2_TUNER_DIGITAL_TV) &&
1048 ((delsys != priv->delsys) || bw != priv->bw))
1049 need_calibration = true;
1050 else
1051 need_calibration = false;
1052
1053 if (need_calibration) {
1054 tuner_dbg("calibrating the tuner\n");
1055 for (i = 0; i < 2; i++) {
1056 /* Set filt_cap */
1057 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x60);
1058 if (rc < 0)
1059 return rc;
1060
1061 /* set cali clk =on */
1062 rc = r820t_write_reg_mask(priv, 0x0f, 0x04, 0x04);
1063 if (rc < 0)
1064 return rc;
1065
1066 /* X'tal cap 0pF for PLL */
1067 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x03);
1068 if (rc < 0)
1069 return rc;
1070
1071 rc = r820t_set_pll(priv, type, filt_cal_lo);
1072 if (rc < 0 || !priv->has_lock)
1073 return rc;
1074
1075 /* Start Trigger */
1076 rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10);
1077 if (rc < 0)
1078 return rc;
1079
1080 usleep_range(1000, 2000);
1081
1082 /* Stop Trigger */
1083 rc = r820t_write_reg_mask(priv, 0x0b, 0x00, 0x10);
1084 if (rc < 0)
1085 return rc;
1086
1087 /* set cali clk =off */
1088 rc = r820t_write_reg_mask(priv, 0x0f, 0x00, 0x04);
1089 if (rc < 0)
1090 return rc;
1091
1092 /* Check if calibration worked */
1093 rc = r820t_read(priv, 0x00, data, sizeof(data));
1094 if (rc < 0)
1095 return rc;
1096
1097 priv->fil_cal_code = data[4] & 0x0f;
1098 if (priv->fil_cal_code && priv->fil_cal_code != 0x0f)
1099 break;
1100 }
1101 /* narrowest */
1102 if (priv->fil_cal_code == 0x0f)
1103 priv->fil_cal_code = 0;
1104 }
1105
1106 rc = r820t_write_reg_mask(priv, 0x0a,
1107 filt_q | priv->fil_cal_code, 0x1f);
1108 if (rc < 0)
1109 return rc;
1110
1111 /* Set BW, Filter_gain, & HP corner */
1112 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x10);
1113 if (rc < 0)
1114 return rc;
1115
1116
1117 /* Set Img_R */
1118 rc = r820t_write_reg_mask(priv, 0x07, img_r, 0x80);
1119 if (rc < 0)
1120 return rc;
1121
1122 /* Set filt_3dB, V6MHz */
1123 rc = r820t_write_reg_mask(priv, 0x06, filt_gain, 0x30);
1124 if (rc < 0)
1125 return rc;
1126
1127 /* channel filter extension */
1128 rc = r820t_write_reg_mask(priv, 0x1e, ext_enable, 0x60);
1129 if (rc < 0)
1130 return rc;
1131
1132 /* Loop through */
1133 rc = r820t_write_reg_mask(priv, 0x05, loop_through, 0x80);
1134 if (rc < 0)
1135 return rc;
1136
1137 /* Loop through attenuation */
1138 rc = r820t_write_reg_mask(priv, 0x1f, lt_att, 0x80);
1139 if (rc < 0)
1140 return rc;
1141
1142 /* filter extension widest */
1143 rc = r820t_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80);
1144 if (rc < 0)
1145 return rc;
1146
1147 /* RF poly filter current */
1148 rc = r820t_write_reg_mask(priv, 0x19, polyfil_cur, 0x60);
1149 if (rc < 0)
1150 return rc;
1151
1152 /* Store current standard. If it changes, re-calibrate the tuner */
1153 priv->delsys = delsys;
1154 priv->type = type;
1155 priv->std = std;
1156 priv->bw = bw;
1157
1158 return 0;
1159 }
1160
1161 static int r820t_read_gain(struct r820t_priv *priv)
1162 {
1163 u8 data[4];
1164 int rc;
1165
1166 rc = r820t_read(priv, 0x00, data, sizeof(data));
1167 if (rc < 0)
1168 return rc;
1169
1170 return ((data[3] & 0x0f) << 1) + ((data[3] & 0xf0) >> 4);
1171 }
1172
1173 static int r820t_set_gain_mode(struct r820t_priv *priv,
1174 bool set_manual_gain,
1175 int gain)
1176 {
1177 int rc;
1178
1179 if (set_manual_gain) {
1180 int i, total_gain = 0;
1181 uint8_t mix_index = 0, lna_index = 0;
1182 u8 data[4];
1183
1184 /* LNA auto off */
1185 rc = r820t_write_reg_mask(priv, 0x05, 0x10, 0x10);
1186 if (rc < 0)
1187 return rc;
1188
1189 /* Mixer auto off */
1190 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1191 if (rc < 0)
1192 return rc;
1193
1194 rc = r820t_read(priv, 0x00, data, sizeof(data));
1195 if (rc < 0)
1196 return rc;
1197
1198 /* set fixed VGA gain for now (16.3 dB) */
1199 rc = r820t_write_reg_mask(priv, 0x0c, 0x08, 0x9f);
1200 if (rc < 0)
1201 return rc;
1202
1203 for (i = 0; i < 15; i++) {
1204 if (total_gain >= gain)
1205 break;
1206
1207 total_gain += r820t_lna_gain_steps[++lna_index];
1208
1209 if (total_gain >= gain)
1210 break;
1211
1212 total_gain += r820t_mixer_gain_steps[++mix_index];
1213 }
1214
1215 /* set LNA gain */
1216 rc = r820t_write_reg_mask(priv, 0x05, lna_index, 0x0f);
1217 if (rc < 0)
1218 return rc;
1219
1220 /* set Mixer gain */
1221 rc = r820t_write_reg_mask(priv, 0x07, mix_index, 0x0f);
1222 if (rc < 0)
1223 return rc;
1224 } else {
1225 /* LNA */
1226 rc = r820t_write_reg_mask(priv, 0x05, 0, 0xef);
1227 if (rc < 0)
1228 return rc;
1229
1230 /* Mixer */
1231 rc = r820t_write_reg_mask(priv, 0x07, 0x10, 0xef);
1232 if (rc < 0)
1233 return rc;
1234
1235 /* set fixed VGA gain for now (26.5 dB) */
1236 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1237 if (rc < 0)
1238 return rc;
1239 }
1240
1241 return 0;
1242 }
1243
1244
1245 static int generic_set_freq(struct dvb_frontend *fe,
1246 u32 freq /* in HZ */,
1247 unsigned bw,
1248 enum v4l2_tuner_type type,
1249 v4l2_std_id std, u32 delsys)
1250 {
1251 struct r820t_priv *priv = fe->tuner_priv;
1252 int rc = -EINVAL;
1253 u32 lo_freq;
1254
1255 tuner_dbg("should set frequency to %d kHz, bw %d MHz\n",
1256 freq / 1000, bw);
1257
1258 rc = r820t_set_tv_standard(priv, bw, type, std, delsys);
1259 if (rc < 0)
1260 goto err;
1261
1262 if ((type == V4L2_TUNER_ANALOG_TV) && (std == V4L2_STD_SECAM_LC))
1263 lo_freq = freq - priv->int_freq;
1264 else
1265 lo_freq = freq + priv->int_freq;
1266
1267 rc = r820t_set_mux(priv, lo_freq);
1268 if (rc < 0)
1269 goto err;
1270
1271 rc = r820t_set_gain_mode(priv, true, 0);
1272 if (rc < 0)
1273 goto err;
1274
1275 rc = r820t_set_pll(priv, type, lo_freq);
1276 if (rc < 0 || !priv->has_lock)
1277 goto err;
1278
1279 rc = r820t_sysfreq_sel(priv, freq, type, std, delsys);
1280 if (rc < 0)
1281 goto err;
1282
1283 tuner_dbg("%s: PLL locked on frequency %d Hz, gain=%d\n",
1284 __func__, freq, r820t_read_gain(priv));
1285
1286 err:
1287
1288 if (rc < 0)
1289 tuner_dbg("%s: failed=%d\n", __func__, rc);
1290 return rc;
1291 }
1292
1293 /*
1294 * r820t standby logic
1295 */
1296
1297 static int r820t_standby(struct r820t_priv *priv)
1298 {
1299 int rc;
1300
1301 /* If device was not initialized yet, don't need to standby */
1302 if (!priv->init_done)
1303 return 0;
1304
1305 rc = r820t_write_reg(priv, 0x06, 0xb1);
1306 if (rc < 0)
1307 return rc;
1308 rc = r820t_write_reg(priv, 0x05, 0x03);
1309 if (rc < 0)
1310 return rc;
1311 rc = r820t_write_reg(priv, 0x07, 0x3a);
1312 if (rc < 0)
1313 return rc;
1314 rc = r820t_write_reg(priv, 0x08, 0x40);
1315 if (rc < 0)
1316 return rc;
1317 rc = r820t_write_reg(priv, 0x09, 0xc0);
1318 if (rc < 0)
1319 return rc;
1320 rc = r820t_write_reg(priv, 0x0a, 0x36);
1321 if (rc < 0)
1322 return rc;
1323 rc = r820t_write_reg(priv, 0x0c, 0x35);
1324 if (rc < 0)
1325 return rc;
1326 rc = r820t_write_reg(priv, 0x0f, 0x68);
1327 if (rc < 0)
1328 return rc;
1329 rc = r820t_write_reg(priv, 0x11, 0x03);
1330 if (rc < 0)
1331 return rc;
1332 rc = r820t_write_reg(priv, 0x17, 0xf4);
1333 if (rc < 0)
1334 return rc;
1335 rc = r820t_write_reg(priv, 0x19, 0x0c);
1336
1337 /* Force initial calibration */
1338 priv->type = -1;
1339
1340 return rc;
1341 }
1342
1343 /*
1344 * r820t device init logic
1345 */
1346
1347 static int r820t_xtal_check(struct r820t_priv *priv)
1348 {
1349 int rc, i;
1350 u8 data[3], val;
1351
1352 /* Initialize the shadow registers */
1353 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1354
1355 /* cap 30pF & Drive Low */
1356 rc = r820t_write_reg_mask(priv, 0x10, 0x0b, 0x0b);
1357 if (rc < 0)
1358 return rc;
1359
1360 /* set pll autotune = 128kHz */
1361 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
1362 if (rc < 0)
1363 return rc;
1364
1365 /* set manual initial reg = 111111; */
1366 rc = r820t_write_reg_mask(priv, 0x13, 0x7f, 0x7f);
1367 if (rc < 0)
1368 return rc;
1369
1370 /* set auto */
1371 rc = r820t_write_reg_mask(priv, 0x13, 0x00, 0x40);
1372 if (rc < 0)
1373 return rc;
1374
1375 /* Try several xtal capacitor alternatives */
1376 for (i = 0; i < ARRAY_SIZE(r820t_xtal_capacitor); i++) {
1377 rc = r820t_write_reg_mask(priv, 0x10,
1378 r820t_xtal_capacitor[i][0], 0x1b);
1379 if (rc < 0)
1380 return rc;
1381
1382 usleep_range(5000, 6000);
1383
1384 rc = r820t_read(priv, 0x00, data, sizeof(data));
1385 if (rc < 0)
1386 return rc;
1387 if ((!data[2]) & 0x40)
1388 continue;
1389
1390 val = data[2] & 0x3f;
1391
1392 if (priv->cfg->xtal == 16000000 && (val > 29 || val < 23))
1393 break;
1394
1395 if (val != 0x3f)
1396 break;
1397 }
1398
1399 if (i == ARRAY_SIZE(r820t_xtal_capacitor))
1400 return -EINVAL;
1401
1402 return r820t_xtal_capacitor[i][1];
1403 }
1404
1405 static int r820t_imr_prepare(struct r820t_priv *priv)
1406 {
1407 int rc;
1408
1409 /* Initialize the shadow registers */
1410 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array));
1411
1412 /* lna off (air-in off) */
1413 rc = r820t_write_reg_mask(priv, 0x05, 0x20, 0x20);
1414 if (rc < 0)
1415 return rc;
1416
1417 /* mixer gain mode = manual */
1418 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10);
1419 if (rc < 0)
1420 return rc;
1421
1422 /* filter corner = lowest */
1423 rc = r820t_write_reg_mask(priv, 0x0a, 0x0f, 0x0f);
1424 if (rc < 0)
1425 return rc;
1426
1427 /* filter bw=+2cap, hp=5M */
1428 rc = r820t_write_reg_mask(priv, 0x0b, 0x60, 0x6f);
1429 if (rc < 0)
1430 return rc;
1431
1432 /* adc=on, vga code mode, gain = 26.5dB */
1433 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f);
1434 if (rc < 0)
1435 return rc;
1436
1437 /* ring clk = on */
1438 rc = r820t_write_reg_mask(priv, 0x0f, 0, 0x08);
1439 if (rc < 0)
1440 return rc;
1441
1442 /* ring power = on */
1443 rc = r820t_write_reg_mask(priv, 0x18, 0x10, 0x10);
1444 if (rc < 0)
1445 return rc;
1446
1447 /* from ring = ring pll in */
1448 rc = r820t_write_reg_mask(priv, 0x1c, 0x02, 0x02);
1449 if (rc < 0)
1450 return rc;
1451
1452 /* sw_pdect = det3 */
1453 rc = r820t_write_reg_mask(priv, 0x1e, 0x80, 0x80);
1454 if (rc < 0)
1455 return rc;
1456
1457 /* Set filt_3dB */
1458 rc = r820t_write_reg_mask(priv, 0x06, 0x20, 0x20);
1459
1460 return rc;
1461 }
1462
1463 static int r820t_multi_read(struct r820t_priv *priv)
1464 {
1465 int rc, i;
1466 u8 data[2], min = 0, max = 255, sum = 0;
1467
1468 usleep_range(5000, 6000);
1469
1470 for (i = 0; i < 6; i++) {
1471 rc = r820t_read(priv, 0x00, data, sizeof(data));
1472 if (rc < 0)
1473 return rc;
1474
1475 sum += data[1];
1476
1477 if (data[1] < min)
1478 min = data[1];
1479
1480 if (data[1] > max)
1481 max = data[1];
1482 }
1483 rc = sum - max - min;
1484
1485 return rc;
1486 }
1487
1488 static int r820t_imr_cross(struct r820t_priv *priv,
1489 struct r820t_sect_type iq_point[3],
1490 u8 *x_direct)
1491 {
1492 struct r820t_sect_type cross[5]; /* (0,0)(0,Q-1)(0,I-1)(Q-1,0)(I-1,0) */
1493 struct r820t_sect_type tmp;
1494 int i, rc;
1495 u8 reg08, reg09;
1496
1497 reg08 = r820t_read_cache_reg(priv, 8) & 0xc0;
1498 reg09 = r820t_read_cache_reg(priv, 9) & 0xc0;
1499
1500 tmp.gain_x = 0;
1501 tmp.phase_y = 0;
1502 tmp.value = 255;
1503
1504 for (i = 0; i < 5; i++) {
1505 switch (i) {
1506 case 0:
1507 cross[i].gain_x = reg08;
1508 cross[i].phase_y = reg09;
1509 break;
1510 case 1:
1511 cross[i].gain_x = reg08; /* 0 */
1512 cross[i].phase_y = reg09 + 1; /* Q-1 */
1513 break;
1514 case 2:
1515 cross[i].gain_x = reg08; /* 0 */
1516 cross[i].phase_y = (reg09 | 0x20) + 1; /* I-1 */
1517 break;
1518 case 3:
1519 cross[i].gain_x = reg08 + 1; /* Q-1 */
1520 cross[i].phase_y = reg09;
1521 break;
1522 default:
1523 cross[i].gain_x = (reg08 | 0x20) + 1; /* I-1 */
1524 cross[i].phase_y = reg09;
1525 }
1526
1527 rc = r820t_write_reg(priv, 0x08, cross[i].gain_x);
1528 if (rc < 0)
1529 return rc;
1530
1531 rc = r820t_write_reg(priv, 0x09, cross[i].phase_y);
1532 if (rc < 0)
1533 return rc;
1534
1535 rc = r820t_multi_read(priv);
1536 if (rc < 0)
1537 return rc;
1538
1539 cross[i].value = rc;
1540
1541 if (cross[i].value < tmp.value)
1542 memcpy(&tmp, &cross[i], sizeof(tmp));
1543 }
1544
1545 if ((tmp.phase_y & 0x1f) == 1) { /* y-direction */
1546 *x_direct = 0;
1547
1548 iq_point[0] = cross[0];
1549 iq_point[1] = cross[1];
1550 iq_point[2] = cross[2];
1551 } else { /* (0,0) or x-direction */
1552 *x_direct = 1;
1553
1554 iq_point[0] = cross[0];
1555 iq_point[1] = cross[3];
1556 iq_point[2] = cross[4];
1557 }
1558 return 0;
1559 }
1560
1561 static void r820t_compre_cor(struct r820t_sect_type iq[3])
1562 {
1563 int i;
1564
1565 for (i = 3; i > 0; i--) {
1566 if (iq[0].value > iq[i - 1].value)
1567 swap(iq[0], iq[i - 1]);
1568 }
1569 }
1570
1571 static int r820t_compre_step(struct r820t_priv *priv,
1572 struct r820t_sect_type iq[3], u8 reg)
1573 {
1574 int rc;
1575 struct r820t_sect_type tmp;
1576
1577 /*
1578 * Purpose: if (Gain<9 or Phase<9), Gain+1 or Phase+1 and compare
1579 * with min value:
1580 * new < min => update to min and continue
1581 * new > min => Exit
1582 */
1583
1584 /* min value already saved in iq[0] */
1585 tmp.phase_y = iq[0].phase_y;
1586 tmp.gain_x = iq[0].gain_x;
1587
1588 while (((tmp.gain_x & 0x1f) < IMR_TRIAL) &&
1589 ((tmp.phase_y & 0x1f) < IMR_TRIAL)) {
1590 if (reg == 0x08)
1591 tmp.gain_x++;
1592 else
1593 tmp.phase_y++;
1594
1595 rc = r820t_write_reg(priv, 0x08, tmp.gain_x);
1596 if (rc < 0)
1597 return rc;
1598
1599 rc = r820t_write_reg(priv, 0x09, tmp.phase_y);
1600 if (rc < 0)
1601 return rc;
1602
1603 rc = r820t_multi_read(priv);
1604 if (rc < 0)
1605 return rc;
1606 tmp.value = rc;
1607
1608 if (tmp.value <= iq[0].value) {
1609 iq[0].gain_x = tmp.gain_x;
1610 iq[0].phase_y = tmp.phase_y;
1611 iq[0].value = tmp.value;
1612 } else {
1613 return 0;
1614 }
1615
1616 }
1617
1618 return 0;
1619 }
1620
1621 static int r820t_iq_tree(struct r820t_priv *priv,
1622 struct r820t_sect_type iq[3],
1623 u8 fix_val, u8 var_val, u8 fix_reg)
1624 {
1625 int rc, i;
1626 u8 tmp, var_reg;
1627
1628 /*
1629 * record IMC results by input gain/phase location then adjust
1630 * gain or phase positive 1 step and negtive 1 step,
1631 * both record results
1632 */
1633
1634 if (fix_reg == 0x08)
1635 var_reg = 0x09;
1636 else
1637 var_reg = 0x08;
1638
1639 for (i = 0; i < 3; i++) {
1640 rc = r820t_write_reg(priv, fix_reg, fix_val);
1641 if (rc < 0)
1642 return rc;
1643
1644 rc = r820t_write_reg(priv, var_reg, var_val);
1645 if (rc < 0)
1646 return rc;
1647
1648 rc = r820t_multi_read(priv);
1649 if (rc < 0)
1650 return rc;
1651 iq[i].value = rc;
1652
1653 if (fix_reg == 0x08) {
1654 iq[i].gain_x = fix_val;
1655 iq[i].phase_y = var_val;
1656 } else {
1657 iq[i].phase_y = fix_val;
1658 iq[i].gain_x = var_val;
1659 }
1660
1661 if (i == 0) { /* try right-side point */
1662 var_val++;
1663 } else if (i == 1) { /* try left-side point */
1664 /* if absolute location is 1, change I/Q direction */
1665 if ((var_val & 0x1f) < 0x02) {
1666 tmp = 2 - (var_val & 0x1f);
1667
1668 /* b[5]:I/Q selection. 0:Q-path, 1:I-path */
1669 if (var_val & 0x20) {
1670 var_val &= 0xc0;
1671 var_val |= tmp;
1672 } else {
1673 var_val |= 0x20 | tmp;
1674 }
1675 } else {
1676 var_val -= 2;
1677 }
1678 }
1679 }
1680
1681 return 0;
1682 }
1683
1684 static int r820t_section(struct r820t_priv *priv,
1685 struct r820t_sect_type *iq_point)
1686 {
1687 int rc;
1688 struct r820t_sect_type compare_iq[3], compare_bet[3];
1689
1690 /* Try X-1 column and save min result to compare_bet[0] */
1691 if (!(iq_point->gain_x & 0x1f))
1692 compare_iq[0].gain_x = ((iq_point->gain_x) & 0xdf) + 1; /* Q-path, Gain=1 */
1693 else
1694 compare_iq[0].gain_x = iq_point->gain_x - 1; /* left point */
1695 compare_iq[0].phase_y = iq_point->phase_y;
1696
1697 /* y-direction */
1698 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1699 compare_iq[0].phase_y, 0x08);
1700 if (rc < 0)
1701 return rc;
1702
1703 r820t_compre_cor(compare_iq);
1704
1705 compare_bet[0] = compare_iq[0];
1706
1707 /* Try X column and save min result to compare_bet[1] */
1708 compare_iq[0].gain_x = iq_point->gain_x;
1709 compare_iq[0].phase_y = iq_point->phase_y;
1710
1711 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1712 compare_iq[0].phase_y, 0x08);
1713 if (rc < 0)
1714 return rc;
1715
1716 r820t_compre_cor(compare_iq);
1717
1718 compare_bet[1] = compare_iq[0];
1719
1720 /* Try X+1 column and save min result to compare_bet[2] */
1721 if ((iq_point->gain_x & 0x1f) == 0x00)
1722 compare_iq[0].gain_x = ((iq_point->gain_x) | 0x20) + 1; /* I-path, Gain=1 */
1723 else
1724 compare_iq[0].gain_x = iq_point->gain_x + 1;
1725 compare_iq[0].phase_y = iq_point->phase_y;
1726
1727 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1728 compare_iq[0].phase_y, 0x08);
1729 if (rc < 0)
1730 return rc;
1731
1732 r820t_compre_cor(compare_iq);
1733
1734 compare_bet[2] = compare_iq[0];
1735
1736 r820t_compre_cor(compare_bet);
1737
1738 *iq_point = compare_bet[0];
1739
1740 return 0;
1741 }
1742
1743 static int r820t_vga_adjust(struct r820t_priv *priv)
1744 {
1745 int rc;
1746 u8 vga_count;
1747
1748 /* increase vga power to let image significant */
1749 for (vga_count = 12; vga_count < 16; vga_count++) {
1750 rc = r820t_write_reg_mask(priv, 0x0c, vga_count, 0x0f);
1751 if (rc < 0)
1752 return rc;
1753
1754 usleep_range(10000, 11000);
1755
1756 rc = r820t_multi_read(priv);
1757 if (rc < 0)
1758 return rc;
1759
1760 if (rc > 40 * 4)
1761 break;
1762 }
1763
1764 return 0;
1765 }
1766
1767 static int r820t_iq(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1768 {
1769 struct r820t_sect_type compare_iq[3];
1770 int rc;
1771 u8 x_direction = 0; /* 1:x, 0:y */
1772 u8 dir_reg, other_reg;
1773
1774 r820t_vga_adjust(priv);
1775
1776 rc = r820t_imr_cross(priv, compare_iq, &x_direction);
1777 if (rc < 0)
1778 return rc;
1779
1780 if (x_direction == 1) {
1781 dir_reg = 0x08;
1782 other_reg = 0x09;
1783 } else {
1784 dir_reg = 0x09;
1785 other_reg = 0x08;
1786 }
1787
1788 /* compare and find min of 3 points. determine i/q direction */
1789 r820t_compre_cor(compare_iq);
1790
1791 /* increase step to find min value of this direction */
1792 rc = r820t_compre_step(priv, compare_iq, dir_reg);
1793 if (rc < 0)
1794 return rc;
1795
1796 /* the other direction */
1797 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1798 compare_iq[0].phase_y, dir_reg);
1799 if (rc < 0)
1800 return rc;
1801
1802 /* compare and find min of 3 points. determine i/q direction */
1803 r820t_compre_cor(compare_iq);
1804
1805 /* increase step to find min value on this direction */
1806 rc = r820t_compre_step(priv, compare_iq, other_reg);
1807 if (rc < 0)
1808 return rc;
1809
1810 /* check 3 points again */
1811 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x,
1812 compare_iq[0].phase_y, other_reg);
1813 if (rc < 0)
1814 return rc;
1815
1816 r820t_compre_cor(compare_iq);
1817
1818 /* section-9 check */
1819 rc = r820t_section(priv, compare_iq);
1820
1821 *iq_pont = compare_iq[0];
1822
1823 /* reset gain/phase control setting */
1824 rc = r820t_write_reg_mask(priv, 0x08, 0, 0x3f);
1825 if (rc < 0)
1826 return rc;
1827
1828 rc = r820t_write_reg_mask(priv, 0x09, 0, 0x3f);
1829
1830 return rc;
1831 }
1832
1833 static int r820t_f_imr(struct r820t_priv *priv, struct r820t_sect_type *iq_pont)
1834 {
1835 int rc;
1836
1837 r820t_vga_adjust(priv);
1838
1839 /*
1840 * search surrounding points from previous point
1841 * try (x-1), (x), (x+1) columns, and find min IMR result point
1842 */
1843 rc = r820t_section(priv, iq_pont);
1844 if (rc < 0)
1845 return rc;
1846
1847 return 0;
1848 }
1849
1850 static int r820t_imr(struct r820t_priv *priv, unsigned imr_mem, bool im_flag)
1851 {
1852 struct r820t_sect_type imr_point;
1853 int rc;
1854 u32 ring_vco, ring_freq, ring_ref;
1855 u8 n_ring, n;
1856 int reg18, reg19, reg1f;
1857
1858 if (priv->cfg->xtal > 24000000)
1859 ring_ref = priv->cfg->xtal / 2;
1860 else
1861 ring_ref = priv->cfg->xtal;
1862
1863 for (n = 0; n < 16; n++) {
1864 if ((16 + n) * 8 * ring_ref >= 3100000) {
1865 n_ring = n;
1866 break;
1867 }
1868
1869 /* n_ring not found */
1870 if (n == 15)
1871 n_ring = n;
1872 }
1873
1874 reg18 = r820t_read_cache_reg(priv, 0x18);
1875 reg19 = r820t_read_cache_reg(priv, 0x19);
1876 reg1f = r820t_read_cache_reg(priv, 0x1f);
1877
1878 reg18 &= 0xf0; /* set ring[3:0] */
1879 reg18 |= n_ring;
1880
1881 ring_vco = (16 + n_ring) * 8 * ring_ref;
1882
1883 reg18 &= 0xdf; /* clear ring_se23 */
1884 reg19 &= 0xfc; /* clear ring_seldiv */
1885 reg1f &= 0xfc; /* clear ring_att */
1886
1887 switch (imr_mem) {
1888 case 0:
1889 ring_freq = ring_vco / 48;
1890 reg18 |= 0x20; /* ring_se23 = 1 */
1891 reg19 |= 0x03; /* ring_seldiv = 3 */
1892 reg1f |= 0x02; /* ring_att 10 */
1893 break;
1894 case 1:
1895 ring_freq = ring_vco / 16;
1896 reg18 |= 0x00; /* ring_se23 = 0 */
1897 reg19 |= 0x02; /* ring_seldiv = 2 */
1898 reg1f |= 0x00; /* pw_ring 00 */
1899 break;
1900 case 2:
1901 ring_freq = ring_vco / 8;
1902 reg18 |= 0x00; /* ring_se23 = 0 */
1903 reg19 |= 0x01; /* ring_seldiv = 1 */
1904 reg1f |= 0x03; /* pw_ring 11 */
1905 break;
1906 case 3:
1907 ring_freq = ring_vco / 6;
1908 reg18 |= 0x20; /* ring_se23 = 1 */
1909 reg19 |= 0x00; /* ring_seldiv = 0 */
1910 reg1f |= 0x03; /* pw_ring 11 */
1911 break;
1912 case 4:
1913 ring_freq = ring_vco / 4;
1914 reg18 |= 0x00; /* ring_se23 = 0 */
1915 reg19 |= 0x00; /* ring_seldiv = 0 */
1916 reg1f |= 0x01; /* pw_ring 01 */
1917 break;
1918 default:
1919 ring_freq = ring_vco / 4;
1920 reg18 |= 0x00; /* ring_se23 = 0 */
1921 reg19 |= 0x00; /* ring_seldiv = 0 */
1922 reg1f |= 0x01; /* pw_ring 01 */
1923 break;
1924 }
1925
1926
1927 /* write pw_ring, n_ring, ringdiv2 registers */
1928
1929 /* n_ring, ring_se23 */
1930 rc = r820t_write_reg(priv, 0x18, reg18);
1931 if (rc < 0)
1932 return rc;
1933
1934 /* ring_sediv */
1935 rc = r820t_write_reg(priv, 0x19, reg19);
1936 if (rc < 0)
1937 return rc;
1938
1939 /* pw_ring */
1940 rc = r820t_write_reg(priv, 0x1f, reg1f);
1941 if (rc < 0)
1942 return rc;
1943
1944 /* mux input freq ~ rf_in freq */
1945 rc = r820t_set_mux(priv, (ring_freq - 5300) * 1000);
1946 if (rc < 0)
1947 return rc;
1948
1949 rc = r820t_set_pll(priv, V4L2_TUNER_DIGITAL_TV,
1950 (ring_freq - 5300) * 1000);
1951 if (!priv->has_lock)
1952 rc = -EINVAL;
1953 if (rc < 0)
1954 return rc;
1955
1956 if (im_flag) {
1957 rc = r820t_iq(priv, &imr_point);
1958 } else {
1959 imr_point.gain_x = priv->imr_data[3].gain_x;
1960 imr_point.phase_y = priv->imr_data[3].phase_y;
1961 imr_point.value = priv->imr_data[3].value;
1962
1963 rc = r820t_f_imr(priv, &imr_point);
1964 }
1965 if (rc < 0)
1966 return rc;
1967
1968 /* save IMR value */
1969 switch (imr_mem) {
1970 case 0:
1971 priv->imr_data[0].gain_x = imr_point.gain_x;
1972 priv->imr_data[0].phase_y = imr_point.phase_y;
1973 priv->imr_data[0].value = imr_point.value;
1974 break;
1975 case 1:
1976 priv->imr_data[1].gain_x = imr_point.gain_x;
1977 priv->imr_data[1].phase_y = imr_point.phase_y;
1978 priv->imr_data[1].value = imr_point.value;
1979 break;
1980 case 2:
1981 priv->imr_data[2].gain_x = imr_point.gain_x;
1982 priv->imr_data[2].phase_y = imr_point.phase_y;
1983 priv->imr_data[2].value = imr_point.value;
1984 break;
1985 case 3:
1986 priv->imr_data[3].gain_x = imr_point.gain_x;
1987 priv->imr_data[3].phase_y = imr_point.phase_y;
1988 priv->imr_data[3].value = imr_point.value;
1989 break;
1990 case 4:
1991 priv->imr_data[4].gain_x = imr_point.gain_x;
1992 priv->imr_data[4].phase_y = imr_point.phase_y;
1993 priv->imr_data[4].value = imr_point.value;
1994 break;
1995 default:
1996 priv->imr_data[4].gain_x = imr_point.gain_x;
1997 priv->imr_data[4].phase_y = imr_point.phase_y;
1998 priv->imr_data[4].value = imr_point.value;
1999 break;
2000 }
2001
2002 return 0;
2003 }
2004
2005 static int r820t_imr_callibrate(struct r820t_priv *priv)
2006 {
2007 int rc, i;
2008 int xtal_cap = 0;
2009
2010 if (priv->init_done)
2011 return 0;
2012
2013 /* Detect Xtal capacitance */
2014 if ((priv->cfg->rafael_chip == CHIP_R820T) ||
2015 (priv->cfg->rafael_chip == CHIP_R828S) ||
2016 (priv->cfg->rafael_chip == CHIP_R820C)) {
2017 priv->xtal_cap_sel = XTAL_HIGH_CAP_0P;
2018 } else {
2019 /* Initialize registers */
2020 rc = r820t_write(priv, 0x05,
2021 r820t_init_array, sizeof(r820t_init_array));
2022 if (rc < 0)
2023 return rc;
2024 for (i = 0; i < 3; i++) {
2025 rc = r820t_xtal_check(priv);
2026 if (rc < 0)
2027 return rc;
2028 if (!i || rc > xtal_cap)
2029 xtal_cap = rc;
2030 }
2031 priv->xtal_cap_sel = xtal_cap;
2032 }
2033
2034 /*
2035 * Disables IMR callibration. That emulates the same behaviour
2036 * as what is done by rtl-sdr userspace library. Useful for testing
2037 */
2038 if (no_imr_cal) {
2039 priv->init_done = true;
2040
2041 return 0;
2042 }
2043
2044 /* Initialize registers */
2045 rc = r820t_write(priv, 0x05,
2046 r820t_init_array, sizeof(r820t_init_array));
2047 if (rc < 0)
2048 return rc;
2049
2050 rc = r820t_imr_prepare(priv);
2051 if (rc < 0)
2052 return rc;
2053
2054 rc = r820t_imr(priv, 3, true);
2055 if (rc < 0)
2056 return rc;
2057 rc = r820t_imr(priv, 1, false);
2058 if (rc < 0)
2059 return rc;
2060 rc = r820t_imr(priv, 0, false);
2061 if (rc < 0)
2062 return rc;
2063 rc = r820t_imr(priv, 2, false);
2064 if (rc < 0)
2065 return rc;
2066 rc = r820t_imr(priv, 4, false);
2067 if (rc < 0)
2068 return rc;
2069
2070 priv->init_done = true;
2071 priv->imr_done = true;
2072
2073 return 0;
2074 }
2075
2076 #if 0
2077 /* Not used, for now */
2078 static int r820t_gpio(struct r820t_priv *priv, bool enable)
2079 {
2080 return r820t_write_reg_mask(priv, 0x0f, enable ? 1 : 0, 0x01);
2081 }
2082 #endif
2083
2084 /*
2085 * r820t frontend operations and tuner attach code
2086 *
2087 * All driver locks and i2c control are only in this part of the code
2088 */
2089
2090 static int r820t_init(struct dvb_frontend *fe)
2091 {
2092 struct r820t_priv *priv = fe->tuner_priv;
2093 int rc;
2094
2095 tuner_dbg("%s:\n", __func__);
2096
2097 mutex_lock(&priv->lock);
2098 if (fe->ops.i2c_gate_ctrl)
2099 fe->ops.i2c_gate_ctrl(fe, 1);
2100
2101 rc = r820t_imr_callibrate(priv);
2102 if (rc < 0)
2103 goto err;
2104
2105 /* Initialize registers */
2106 rc = r820t_write(priv, 0x05,
2107 r820t_init_array, sizeof(r820t_init_array));
2108
2109 err:
2110 if (fe->ops.i2c_gate_ctrl)
2111 fe->ops.i2c_gate_ctrl(fe, 0);
2112 mutex_unlock(&priv->lock);
2113
2114 if (rc < 0)
2115 tuner_dbg("%s: failed=%d\n", __func__, rc);
2116 return rc;
2117 }
2118
2119 static int r820t_sleep(struct dvb_frontend *fe)
2120 {
2121 struct r820t_priv *priv = fe->tuner_priv;
2122 int rc;
2123
2124 tuner_dbg("%s:\n", __func__);
2125
2126 mutex_lock(&priv->lock);
2127 if (fe->ops.i2c_gate_ctrl)
2128 fe->ops.i2c_gate_ctrl(fe, 1);
2129
2130 rc = r820t_standby(priv);
2131
2132 if (fe->ops.i2c_gate_ctrl)
2133 fe->ops.i2c_gate_ctrl(fe, 0);
2134 mutex_unlock(&priv->lock);
2135
2136 tuner_dbg("%s: failed=%d\n", __func__, rc);
2137 return rc;
2138 }
2139
2140 static int r820t_set_analog_freq(struct dvb_frontend *fe,
2141 struct analog_parameters *p)
2142 {
2143 struct r820t_priv *priv = fe->tuner_priv;
2144 unsigned bw;
2145 int rc;
2146
2147 tuner_dbg("%s called\n", __func__);
2148
2149 /* if std is not defined, choose one */
2150 if (!p->std)
2151 p->std = V4L2_STD_MN;
2152
2153 if ((p->std == V4L2_STD_PAL_M) || (p->std == V4L2_STD_NTSC))
2154 bw = 6;
2155 else
2156 bw = 8;
2157
2158 mutex_lock(&priv->lock);
2159 if (fe->ops.i2c_gate_ctrl)
2160 fe->ops.i2c_gate_ctrl(fe, 1);
2161
2162 rc = generic_set_freq(fe, 62500l * p->frequency, bw,
2163 V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED);
2164
2165 if (fe->ops.i2c_gate_ctrl)
2166 fe->ops.i2c_gate_ctrl(fe, 0);
2167 mutex_unlock(&priv->lock);
2168
2169 return rc;
2170 }
2171
2172 static int r820t_set_params(struct dvb_frontend *fe)
2173 {
2174 struct r820t_priv *priv = fe->tuner_priv;
2175 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2176 int rc;
2177 unsigned bw;
2178
2179 tuner_dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
2180 __func__, c->delivery_system, c->frequency, c->bandwidth_hz);
2181
2182 mutex_lock(&priv->lock);
2183 if (fe->ops.i2c_gate_ctrl)
2184 fe->ops.i2c_gate_ctrl(fe, 1);
2185
2186 bw = (c->bandwidth_hz + 500000) / 1000000;
2187 if (!bw)
2188 bw = 8;
2189
2190 rc = generic_set_freq(fe, c->frequency, bw,
2191 V4L2_TUNER_DIGITAL_TV, 0, c->delivery_system);
2192
2193 if (fe->ops.i2c_gate_ctrl)
2194 fe->ops.i2c_gate_ctrl(fe, 0);
2195 mutex_unlock(&priv->lock);
2196
2197 if (rc)
2198 tuner_dbg("%s: failed=%d\n", __func__, rc);
2199 return rc;
2200 }
2201
2202 static int r820t_signal(struct dvb_frontend *fe, u16 *strength)
2203 {
2204 struct r820t_priv *priv = fe->tuner_priv;
2205 int rc = 0;
2206
2207 mutex_lock(&priv->lock);
2208 if (fe->ops.i2c_gate_ctrl)
2209 fe->ops.i2c_gate_ctrl(fe, 1);
2210
2211 if (priv->has_lock) {
2212 rc = r820t_read_gain(priv);
2213 if (rc < 0)
2214 goto err;
2215
2216 /* A higher gain at LNA means a lower signal strength */
2217 *strength = (45 - rc) << 4 | 0xff;
2218 if (*strength == 0xff)
2219 *strength = 0;
2220 } else {
2221 *strength = 0;
2222 }
2223
2224 err:
2225 if (fe->ops.i2c_gate_ctrl)
2226 fe->ops.i2c_gate_ctrl(fe, 0);
2227 mutex_unlock(&priv->lock);
2228
2229 tuner_dbg("%s: %s, gain=%d strength=%d\n",
2230 __func__,
2231 priv->has_lock ? "PLL locked" : "no signal",
2232 rc, *strength);
2233
2234 return 0;
2235 }
2236
2237 static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
2238 {
2239 struct r820t_priv *priv = fe->tuner_priv;
2240
2241 tuner_dbg("%s:\n", __func__);
2242
2243 *frequency = priv->int_freq;
2244
2245 return 0;
2246 }
2247
2248 static int r820t_release(struct dvb_frontend *fe)
2249 {
2250 struct r820t_priv *priv = fe->tuner_priv;
2251
2252 tuner_dbg("%s:\n", __func__);
2253
2254 mutex_lock(&r820t_list_mutex);
2255
2256 if (priv)
2257 hybrid_tuner_release_state(priv);
2258
2259 mutex_unlock(&r820t_list_mutex);
2260
2261 fe->tuner_priv = NULL;
2262
2263 kfree(fe->tuner_priv);
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 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops, sizeof(r820t_tuner_ops));
2318
2319 if (fe->ops.i2c_gate_ctrl)
2320 fe->ops.i2c_gate_ctrl(fe, 1);
2321
2322 /* check if the tuner is there */
2323 rc = r820t_read(priv, 0x00, data, sizeof(data));
2324 if (rc < 0)
2325 goto err;
2326
2327 rc = r820t_sleep(fe);
2328 if (rc < 0)
2329 goto err;
2330
2331 tuner_info("Rafael Micro r820t successfully identified\n");
2332
2333 fe->tuner_priv = priv;
2334 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops,
2335 sizeof(struct dvb_tuner_ops));
2336
2337 if (fe->ops.i2c_gate_ctrl)
2338 fe->ops.i2c_gate_ctrl(fe, 0);
2339
2340 mutex_unlock(&r820t_list_mutex);
2341
2342 return fe;
2343 err:
2344 if (fe->ops.i2c_gate_ctrl)
2345 fe->ops.i2c_gate_ctrl(fe, 0);
2346
2347 err_no_gate:
2348 mutex_unlock(&r820t_list_mutex);
2349
2350 tuner_info("%s: failed=%d\n", __func__, rc);
2351 r820t_release(fe);
2352 return NULL;
2353 }
2354 EXPORT_SYMBOL_GPL(r820t_attach);
2355
2356 MODULE_DESCRIPTION("Rafael Micro r820t silicon tuner driver");
2357 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
2358 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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