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Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
[mirror_ubuntu-artful-kernel.git] / drivers / media / dvb-frontends / mb86a20s.c
1 /*
2 * Fujitu mb86a20s ISDB-T/ISDB-Tsb Module driver
3 *
4 * Copyright (C) 2010-2013 Mauro Carvalho Chehab <mchehab@redhat.com>
5 * Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation version 2.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 */
16
17 #include <linux/kernel.h>
18 #include <asm/div64.h>
19
20 #include "dvb_frontend.h"
21 #include "mb86a20s.h"
22
23 static int debug = 1;
24 module_param(debug, int, 0644);
25 MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
26
27 struct mb86a20s_state {
28 struct i2c_adapter *i2c;
29 const struct mb86a20s_config *config;
30 u32 last_frequency;
31
32 struct dvb_frontend frontend;
33
34 u32 estimated_rate[3];
35
36 bool need_init;
37 };
38
39 struct regdata {
40 u8 reg;
41 u8 data;
42 };
43
44 #define BER_SAMPLING_RATE 1 /* Seconds */
45
46 /*
47 * Initialization sequence: Use whatevere default values that PV SBTVD
48 * does on its initialisation, obtained via USB snoop
49 */
50 static struct regdata mb86a20s_init[] = {
51 { 0x70, 0x0f },
52 { 0x70, 0xff },
53 { 0x08, 0x01 },
54 { 0x09, 0x3e },
55 { 0x50, 0xd1 }, { 0x51, 0x22 },
56 { 0x39, 0x01 },
57 { 0x71, 0x00 },
58 { 0x28, 0x2a }, { 0x29, 0x00 }, { 0x2a, 0xff }, { 0x2b, 0x80 },
59 { 0x28, 0x20 }, { 0x29, 0x33 }, { 0x2a, 0xdf }, { 0x2b, 0xa9 },
60 { 0x28, 0x22 }, { 0x29, 0x00 }, { 0x2a, 0x1f }, { 0x2b, 0xf0 },
61 { 0x3b, 0x21 },
62 { 0x3c, 0x3a },
63 { 0x01, 0x0d },
64 { 0x04, 0x08 }, { 0x05, 0x05 },
65 { 0x04, 0x0e }, { 0x05, 0x00 },
66 { 0x04, 0x0f }, { 0x05, 0x14 },
67 { 0x04, 0x0b }, { 0x05, 0x8c },
68 { 0x04, 0x00 }, { 0x05, 0x00 },
69 { 0x04, 0x01 }, { 0x05, 0x07 },
70 { 0x04, 0x02 }, { 0x05, 0x0f },
71 { 0x04, 0x03 }, { 0x05, 0xa0 },
72 { 0x04, 0x09 }, { 0x05, 0x00 },
73 { 0x04, 0x0a }, { 0x05, 0xff },
74 { 0x04, 0x27 }, { 0x05, 0x64 },
75 { 0x04, 0x28 }, { 0x05, 0x00 },
76 { 0x04, 0x1e }, { 0x05, 0xff },
77 { 0x04, 0x29 }, { 0x05, 0x0a },
78 { 0x04, 0x32 }, { 0x05, 0x0a },
79 { 0x04, 0x14 }, { 0x05, 0x02 },
80 { 0x04, 0x04 }, { 0x05, 0x00 },
81 { 0x04, 0x05 }, { 0x05, 0x22 },
82 { 0x04, 0x06 }, { 0x05, 0x0e },
83 { 0x04, 0x07 }, { 0x05, 0xd8 },
84 { 0x04, 0x12 }, { 0x05, 0x00 },
85 { 0x04, 0x13 }, { 0x05, 0xff },
86 { 0x04, 0x15 }, { 0x05, 0x4e },
87 { 0x04, 0x16 }, { 0x05, 0x20 },
88
89 /*
90 * On this demod, when the bit count reaches the count below,
91 * it collects the bit error count. The bit counters are initialized
92 * to 65535 here. This warrants that all of them will be quickly
93 * calculated when device gets locked. As TMCC is parsed, the values
94 * will be adjusted later in the driver's code.
95 */
96 { 0x52, 0x01 }, /* Turn on BER before Viterbi */
97 { 0x50, 0xa7 }, { 0x51, 0x00 },
98 { 0x50, 0xa8 }, { 0x51, 0xff },
99 { 0x50, 0xa9 }, { 0x51, 0xff },
100 { 0x50, 0xaa }, { 0x51, 0x00 },
101 { 0x50, 0xab }, { 0x51, 0xff },
102 { 0x50, 0xac }, { 0x51, 0xff },
103 { 0x50, 0xad }, { 0x51, 0x00 },
104 { 0x50, 0xae }, { 0x51, 0xff },
105 { 0x50, 0xaf }, { 0x51, 0xff },
106
107 /*
108 * On this demod, post BER counts blocks. When the count reaches the
109 * value below, it collects the block error count. The block counters
110 * are initialized to 127 here. This warrants that all of them will be
111 * quickly calculated when device gets locked. As TMCC is parsed, the
112 * values will be adjusted later in the driver's code.
113 */
114 { 0x5e, 0x07 }, /* Turn on BER after Viterbi */
115 { 0x50, 0xdc }, { 0x51, 0x00 },
116 { 0x50, 0xdd }, { 0x51, 0x7f },
117 { 0x50, 0xde }, { 0x51, 0x00 },
118 { 0x50, 0xdf }, { 0x51, 0x7f },
119 { 0x50, 0xe0 }, { 0x51, 0x00 },
120 { 0x50, 0xe1 }, { 0x51, 0x7f },
121
122 /*
123 * On this demod, when the block count reaches the count below,
124 * it collects the block error count. The block counters are initialized
125 * to 127 here. This warrants that all of them will be quickly
126 * calculated when device gets locked. As TMCC is parsed, the values
127 * will be adjusted later in the driver's code.
128 */
129 { 0x50, 0xb0 }, { 0x51, 0x07 }, /* Enable PER */
130 { 0x50, 0xb2 }, { 0x51, 0x00 },
131 { 0x50, 0xb3 }, { 0x51, 0x7f },
132 { 0x50, 0xb4 }, { 0x51, 0x00 },
133 { 0x50, 0xb5 }, { 0x51, 0x7f },
134 { 0x50, 0xb6 }, { 0x51, 0x00 },
135 { 0x50, 0xb7 }, { 0x51, 0x7f },
136
137 { 0x50, 0x50 }, { 0x51, 0x02 }, /* MER manual mode */
138 { 0x50, 0x51 }, { 0x51, 0x04 }, /* MER symbol 4 */
139 { 0x45, 0x04 }, /* CN symbol 4 */
140 { 0x48, 0x04 }, /* CN manual mode */
141
142 { 0x50, 0xd5 }, { 0x51, 0x01 }, /* Serial */
143 { 0x50, 0xd6 }, { 0x51, 0x1f },
144 { 0x50, 0xd2 }, { 0x51, 0x03 },
145 { 0x50, 0xd7 }, { 0x51, 0x3f },
146 { 0x28, 0x74 }, { 0x29, 0x00 }, { 0x28, 0x74 }, { 0x29, 0x40 },
147 { 0x28, 0x46 }, { 0x29, 0x2c }, { 0x28, 0x46 }, { 0x29, 0x0c },
148
149 { 0x04, 0x40 }, { 0x05, 0x00 },
150 { 0x28, 0x00 }, { 0x29, 0x10 },
151 { 0x28, 0x05 }, { 0x29, 0x02 },
152 { 0x1c, 0x01 },
153 { 0x28, 0x06 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x03 },
154 { 0x28, 0x07 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x0d },
155 { 0x28, 0x08 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x02 },
156 { 0x28, 0x09 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x01 },
157 { 0x28, 0x0a }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x21 },
158 { 0x28, 0x0b }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x29 },
159 { 0x28, 0x0c }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x16 },
160 { 0x28, 0x0d }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x31 },
161 { 0x28, 0x0e }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x0e },
162 { 0x28, 0x0f }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x4e },
163 { 0x28, 0x10 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x46 },
164 { 0x28, 0x11 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x0f },
165 { 0x28, 0x12 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x56 },
166 { 0x28, 0x13 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x35 },
167 { 0x28, 0x14 }, { 0x29, 0x00 }, { 0x2a, 0x01 }, { 0x2b, 0xbe },
168 { 0x28, 0x15 }, { 0x29, 0x00 }, { 0x2a, 0x01 }, { 0x2b, 0x84 },
169 { 0x28, 0x16 }, { 0x29, 0x00 }, { 0x2a, 0x03 }, { 0x2b, 0xee },
170 { 0x28, 0x17 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x98 },
171 { 0x28, 0x18 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x9f },
172 { 0x28, 0x19 }, { 0x29, 0x00 }, { 0x2a, 0x07 }, { 0x2b, 0xb2 },
173 { 0x28, 0x1a }, { 0x29, 0x00 }, { 0x2a, 0x06 }, { 0x2b, 0xc2 },
174 { 0x28, 0x1b }, { 0x29, 0x00 }, { 0x2a, 0x07 }, { 0x2b, 0x4a },
175 { 0x28, 0x1c }, { 0x29, 0x00 }, { 0x2a, 0x01 }, { 0x2b, 0xbc },
176 { 0x28, 0x1d }, { 0x29, 0x00 }, { 0x2a, 0x04 }, { 0x2b, 0xba },
177 { 0x28, 0x1e }, { 0x29, 0x00 }, { 0x2a, 0x06 }, { 0x2b, 0x14 },
178 { 0x50, 0x1e }, { 0x51, 0x5d },
179 { 0x50, 0x22 }, { 0x51, 0x00 },
180 { 0x50, 0x23 }, { 0x51, 0xc8 },
181 { 0x50, 0x24 }, { 0x51, 0x00 },
182 { 0x50, 0x25 }, { 0x51, 0xf0 },
183 { 0x50, 0x26 }, { 0x51, 0x00 },
184 { 0x50, 0x27 }, { 0x51, 0xc3 },
185 { 0x50, 0x39 }, { 0x51, 0x02 },
186 { 0x28, 0x6a }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x00 },
187 { 0xd0, 0x00 },
188 };
189
190 static struct regdata mb86a20s_reset_reception[] = {
191 { 0x70, 0xf0 },
192 { 0x70, 0xff },
193 { 0x08, 0x01 },
194 { 0x08, 0x00 },
195 };
196
197 static struct regdata mb86a20s_per_ber_reset[] = {
198 { 0x53, 0x00 }, /* pre BER Counter reset */
199 { 0x53, 0x07 },
200
201 { 0x5f, 0x00 }, /* post BER Counter reset */
202 { 0x5f, 0x07 },
203
204 { 0x50, 0xb1 }, /* PER Counter reset */
205 { 0x51, 0x07 },
206 { 0x51, 0x00 },
207 };
208
209 /*
210 * I2C read/write functions and macros
211 */
212
213 static int mb86a20s_i2c_writereg(struct mb86a20s_state *state,
214 u8 i2c_addr, u8 reg, u8 data)
215 {
216 u8 buf[] = { reg, data };
217 struct i2c_msg msg = {
218 .addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
219 };
220 int rc;
221
222 rc = i2c_transfer(state->i2c, &msg, 1);
223 if (rc != 1) {
224 dev_err(&state->i2c->dev,
225 "%s: writereg error (rc == %i, reg == 0x%02x, data == 0x%02x)\n",
226 __func__, rc, reg, data);
227 return rc;
228 }
229
230 return 0;
231 }
232
233 static int mb86a20s_i2c_writeregdata(struct mb86a20s_state *state,
234 u8 i2c_addr, struct regdata *rd, int size)
235 {
236 int i, rc;
237
238 for (i = 0; i < size; i++) {
239 rc = mb86a20s_i2c_writereg(state, i2c_addr, rd[i].reg,
240 rd[i].data);
241 if (rc < 0)
242 return rc;
243 }
244 return 0;
245 }
246
247 static int mb86a20s_i2c_readreg(struct mb86a20s_state *state,
248 u8 i2c_addr, u8 reg)
249 {
250 u8 val;
251 int rc;
252 struct i2c_msg msg[] = {
253 { .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
254 { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
255 };
256
257 rc = i2c_transfer(state->i2c, msg, 2);
258
259 if (rc != 2) {
260 dev_err(&state->i2c->dev, "%s: reg=0x%x (error=%d)\n",
261 __func__, reg, rc);
262 return (rc < 0) ? rc : -EIO;
263 }
264
265 return val;
266 }
267
268 #define mb86a20s_readreg(state, reg) \
269 mb86a20s_i2c_readreg(state, state->config->demod_address, reg)
270 #define mb86a20s_writereg(state, reg, val) \
271 mb86a20s_i2c_writereg(state, state->config->demod_address, reg, val)
272 #define mb86a20s_writeregdata(state, regdata) \
273 mb86a20s_i2c_writeregdata(state, state->config->demod_address, \
274 regdata, ARRAY_SIZE(regdata))
275
276 /*
277 * Ancillary internal routines (likely compiled inlined)
278 *
279 * The functions below assume that gateway lock has already obtained
280 */
281
282 static int mb86a20s_read_status(struct dvb_frontend *fe, fe_status_t *status)
283 {
284 struct mb86a20s_state *state = fe->demodulator_priv;
285 int val;
286
287 *status = 0;
288
289 val = mb86a20s_readreg(state, 0x0a) & 0xf;
290 if (val < 0)
291 return val;
292
293 if (val >= 2)
294 *status |= FE_HAS_SIGNAL;
295
296 if (val >= 4)
297 *status |= FE_HAS_CARRIER;
298
299 if (val >= 5)
300 *status |= FE_HAS_VITERBI;
301
302 if (val >= 7)
303 *status |= FE_HAS_SYNC;
304
305 if (val >= 8) /* Maybe 9? */
306 *status |= FE_HAS_LOCK;
307
308 dev_dbg(&state->i2c->dev, "%s: Status = 0x%02x (state = %d)\n",
309 __func__, *status, val);
310
311 return 0;
312 }
313
314 static int mb86a20s_read_signal_strength(struct dvb_frontend *fe)
315 {
316 struct mb86a20s_state *state = fe->demodulator_priv;
317 int rc;
318 unsigned rf_max, rf_min, rf;
319
320 /* Does a binary search to get RF strength */
321 rf_max = 0xfff;
322 rf_min = 0;
323 do {
324 rf = (rf_max + rf_min) / 2;
325 rc = mb86a20s_writereg(state, 0x04, 0x1f);
326 if (rc < 0)
327 return rc;
328 rc = mb86a20s_writereg(state, 0x05, rf >> 8);
329 if (rc < 0)
330 return rc;
331 rc = mb86a20s_writereg(state, 0x04, 0x20);
332 if (rc < 0)
333 return rc;
334 rc = mb86a20s_writereg(state, 0x04, rf);
335 if (rc < 0)
336 return rc;
337
338 rc = mb86a20s_readreg(state, 0x02);
339 if (rc < 0)
340 return rc;
341 if (rc & 0x08)
342 rf_min = (rf_max + rf_min) / 2;
343 else
344 rf_max = (rf_max + rf_min) / 2;
345 if (rf_max - rf_min < 4) {
346 rf = (rf_max + rf_min) / 2;
347
348 /* Rescale it from 2^12 (4096) to 2^16 */
349 rf <<= (16 - 12);
350 dev_dbg(&state->i2c->dev,
351 "%s: signal strength = %d (%d < RF=%d < %d)\n",
352 __func__, rf, rf_min, rf >> 4, rf_max);
353 return rf;
354 }
355 } while (1);
356
357 return 0;
358 }
359
360 static int mb86a20s_get_modulation(struct mb86a20s_state *state,
361 unsigned layer)
362 {
363 int rc;
364 static unsigned char reg[] = {
365 [0] = 0x86, /* Layer A */
366 [1] = 0x8a, /* Layer B */
367 [2] = 0x8e, /* Layer C */
368 };
369
370 if (layer >= ARRAY_SIZE(reg))
371 return -EINVAL;
372 rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
373 if (rc < 0)
374 return rc;
375 rc = mb86a20s_readreg(state, 0x6e);
376 if (rc < 0)
377 return rc;
378 switch ((rc >> 4) & 0x07) {
379 case 0:
380 return DQPSK;
381 case 1:
382 return QPSK;
383 case 2:
384 return QAM_16;
385 case 3:
386 return QAM_64;
387 default:
388 return QAM_AUTO;
389 }
390 }
391
392 static int mb86a20s_get_fec(struct mb86a20s_state *state,
393 unsigned layer)
394 {
395 int rc;
396
397 static unsigned char reg[] = {
398 [0] = 0x87, /* Layer A */
399 [1] = 0x8b, /* Layer B */
400 [2] = 0x8f, /* Layer C */
401 };
402
403 if (layer >= ARRAY_SIZE(reg))
404 return -EINVAL;
405 rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
406 if (rc < 0)
407 return rc;
408 rc = mb86a20s_readreg(state, 0x6e);
409 if (rc < 0)
410 return rc;
411 switch ((rc >> 4) & 0x07) {
412 case 0:
413 return FEC_1_2;
414 case 1:
415 return FEC_2_3;
416 case 2:
417 return FEC_3_4;
418 case 3:
419 return FEC_5_6;
420 case 4:
421 return FEC_7_8;
422 default:
423 return FEC_AUTO;
424 }
425 }
426
427 static int mb86a20s_get_interleaving(struct mb86a20s_state *state,
428 unsigned layer)
429 {
430 int rc;
431
432 static unsigned char reg[] = {
433 [0] = 0x88, /* Layer A */
434 [1] = 0x8c, /* Layer B */
435 [2] = 0x90, /* Layer C */
436 };
437
438 if (layer >= ARRAY_SIZE(reg))
439 return -EINVAL;
440 rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
441 if (rc < 0)
442 return rc;
443 rc = mb86a20s_readreg(state, 0x6e);
444 if (rc < 0)
445 return rc;
446
447 switch ((rc >> 4) & 0x07) {
448 case 1:
449 return GUARD_INTERVAL_1_4;
450 case 2:
451 return GUARD_INTERVAL_1_8;
452 case 3:
453 return GUARD_INTERVAL_1_16;
454 case 4:
455 return GUARD_INTERVAL_1_32;
456
457 default:
458 case 0:
459 return GUARD_INTERVAL_AUTO;
460 }
461 }
462
463 static int mb86a20s_get_segment_count(struct mb86a20s_state *state,
464 unsigned layer)
465 {
466 int rc, count;
467 static unsigned char reg[] = {
468 [0] = 0x89, /* Layer A */
469 [1] = 0x8d, /* Layer B */
470 [2] = 0x91, /* Layer C */
471 };
472
473 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
474
475 if (layer >= ARRAY_SIZE(reg))
476 return -EINVAL;
477
478 rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
479 if (rc < 0)
480 return rc;
481 rc = mb86a20s_readreg(state, 0x6e);
482 if (rc < 0)
483 return rc;
484 count = (rc >> 4) & 0x0f;
485
486 dev_dbg(&state->i2c->dev, "%s: segments: %d.\n", __func__, count);
487
488 return count;
489 }
490
491 static void mb86a20s_reset_frontend_cache(struct dvb_frontend *fe)
492 {
493 struct mb86a20s_state *state = fe->demodulator_priv;
494 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
495
496 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
497
498 /* Fixed parameters */
499 c->delivery_system = SYS_ISDBT;
500 c->bandwidth_hz = 6000000;
501
502 /* Initialize values that will be later autodetected */
503 c->isdbt_layer_enabled = 0;
504 c->transmission_mode = TRANSMISSION_MODE_AUTO;
505 c->guard_interval = GUARD_INTERVAL_AUTO;
506 c->isdbt_sb_mode = 0;
507 c->isdbt_sb_segment_count = 0;
508 }
509
510 /*
511 * Estimates the bit rate using the per-segment bit rate given by
512 * ABNT/NBR 15601 spec (table 4).
513 */
514 static u32 isdbt_rate[3][5][4] = {
515 { /* DQPSK/QPSK */
516 { 280850, 312060, 330420, 340430 }, /* 1/2 */
517 { 374470, 416080, 440560, 453910 }, /* 2/3 */
518 { 421280, 468090, 495630, 510650 }, /* 3/4 */
519 { 468090, 520100, 550700, 567390 }, /* 5/6 */
520 { 491500, 546110, 578230, 595760 }, /* 7/8 */
521 }, { /* QAM16 */
522 { 561710, 624130, 660840, 680870 }, /* 1/2 */
523 { 748950, 832170, 881120, 907820 }, /* 2/3 */
524 { 842570, 936190, 991260, 1021300 }, /* 3/4 */
525 { 936190, 1040210, 1101400, 1134780 }, /* 5/6 */
526 { 983000, 1092220, 1156470, 1191520 }, /* 7/8 */
527 }, { /* QAM64 */
528 { 842570, 936190, 991260, 1021300 }, /* 1/2 */
529 { 1123430, 1248260, 1321680, 1361740 }, /* 2/3 */
530 { 1263860, 1404290, 1486900, 1531950 }, /* 3/4 */
531 { 1404290, 1560320, 1652110, 1702170 }, /* 5/6 */
532 { 1474500, 1638340, 1734710, 1787280 }, /* 7/8 */
533 }
534 };
535
536 static void mb86a20s_layer_bitrate(struct dvb_frontend *fe, u32 layer,
537 u32 modulation, u32 fec, u32 interleaving,
538 u32 segment)
539 {
540 struct mb86a20s_state *state = fe->demodulator_priv;
541 u32 rate;
542 int m, f, i;
543
544 /*
545 * If modulation/fec/interleaving is not detected, the default is
546 * to consider the lowest bit rate, to avoid taking too long time
547 * to get BER.
548 */
549 switch (modulation) {
550 case DQPSK:
551 case QPSK:
552 default:
553 m = 0;
554 break;
555 case QAM_16:
556 m = 1;
557 break;
558 case QAM_64:
559 m = 2;
560 break;
561 }
562
563 switch (fec) {
564 default:
565 case FEC_1_2:
566 case FEC_AUTO:
567 f = 0;
568 break;
569 case FEC_2_3:
570 f = 1;
571 break;
572 case FEC_3_4:
573 f = 2;
574 break;
575 case FEC_5_6:
576 f = 3;
577 break;
578 case FEC_7_8:
579 f = 4;
580 break;
581 }
582
583 switch (interleaving) {
584 default:
585 case GUARD_INTERVAL_1_4:
586 i = 0;
587 break;
588 case GUARD_INTERVAL_1_8:
589 i = 1;
590 break;
591 case GUARD_INTERVAL_1_16:
592 i = 2;
593 break;
594 case GUARD_INTERVAL_1_32:
595 i = 3;
596 break;
597 }
598
599 /* Samples BER at BER_SAMPLING_RATE seconds */
600 rate = isdbt_rate[m][f][i] * segment * BER_SAMPLING_RATE;
601
602 /* Avoids sampling too quickly or to overflow the register */
603 if (rate < 256)
604 rate = 256;
605 else if (rate > (1 << 24) - 1)
606 rate = (1 << 24) - 1;
607
608 dev_dbg(&state->i2c->dev,
609 "%s: layer %c bitrate: %d kbps; counter = %d (0x%06x)\n",
610 __func__, 'A' + layer, segment * isdbt_rate[m][f][i]/1000,
611 rate, rate);
612
613 state->estimated_rate[i] = rate;
614 }
615
616
617 static int mb86a20s_get_frontend(struct dvb_frontend *fe)
618 {
619 struct mb86a20s_state *state = fe->demodulator_priv;
620 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
621 int i, rc;
622
623 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
624
625 /* Reset frontend cache to default values */
626 mb86a20s_reset_frontend_cache(fe);
627
628 /* Check for partial reception */
629 rc = mb86a20s_writereg(state, 0x6d, 0x85);
630 if (rc < 0)
631 return rc;
632 rc = mb86a20s_readreg(state, 0x6e);
633 if (rc < 0)
634 return rc;
635 c->isdbt_partial_reception = (rc & 0x10) ? 1 : 0;
636
637 /* Get per-layer data */
638
639 for (i = 0; i < 3; i++) {
640 dev_dbg(&state->i2c->dev, "%s: getting data for layer %c.\n",
641 __func__, 'A' + i);
642
643 rc = mb86a20s_get_segment_count(state, i);
644 if (rc < 0)
645 goto noperlayer_error;
646 if (rc >= 0 && rc < 14) {
647 c->layer[i].segment_count = rc;
648 } else {
649 c->layer[i].segment_count = 0;
650 state->estimated_rate[i] = 0;
651 continue;
652 }
653 c->isdbt_layer_enabled |= 1 << i;
654 rc = mb86a20s_get_modulation(state, i);
655 if (rc < 0)
656 goto noperlayer_error;
657 dev_dbg(&state->i2c->dev, "%s: modulation %d.\n",
658 __func__, rc);
659 c->layer[i].modulation = rc;
660 rc = mb86a20s_get_fec(state, i);
661 if (rc < 0)
662 goto noperlayer_error;
663 dev_dbg(&state->i2c->dev, "%s: FEC %d.\n",
664 __func__, rc);
665 c->layer[i].fec = rc;
666 rc = mb86a20s_get_interleaving(state, i);
667 if (rc < 0)
668 goto noperlayer_error;
669 dev_dbg(&state->i2c->dev, "%s: interleaving %d.\n",
670 __func__, rc);
671 c->layer[i].interleaving = rc;
672 mb86a20s_layer_bitrate(fe, i, c->layer[i].modulation,
673 c->layer[i].fec,
674 c->layer[i].interleaving,
675 c->layer[i].segment_count);
676 }
677
678 rc = mb86a20s_writereg(state, 0x6d, 0x84);
679 if (rc < 0)
680 return rc;
681 if ((rc & 0x60) == 0x20) {
682 c->isdbt_sb_mode = 1;
683 /* At least, one segment should exist */
684 if (!c->isdbt_sb_segment_count)
685 c->isdbt_sb_segment_count = 1;
686 }
687
688 /* Get transmission mode and guard interval */
689 rc = mb86a20s_readreg(state, 0x07);
690 if (rc < 0)
691 return rc;
692 if ((rc & 0x60) == 0x20) {
693 switch (rc & 0x0c >> 2) {
694 case 0:
695 c->transmission_mode = TRANSMISSION_MODE_2K;
696 break;
697 case 1:
698 c->transmission_mode = TRANSMISSION_MODE_4K;
699 break;
700 case 2:
701 c->transmission_mode = TRANSMISSION_MODE_8K;
702 break;
703 }
704 }
705 if (!(rc & 0x10)) {
706 switch (rc & 0x3) {
707 case 0:
708 c->guard_interval = GUARD_INTERVAL_1_4;
709 break;
710 case 1:
711 c->guard_interval = GUARD_INTERVAL_1_8;
712 break;
713 case 2:
714 c->guard_interval = GUARD_INTERVAL_1_16;
715 break;
716 }
717 }
718 return 0;
719
720 noperlayer_error:
721
722 /* per-layer info is incomplete; discard all per-layer */
723 c->isdbt_layer_enabled = 0;
724
725 return rc;
726 }
727
728 static int mb86a20s_reset_counters(struct dvb_frontend *fe)
729 {
730 struct mb86a20s_state *state = fe->demodulator_priv;
731 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
732 int rc, val;
733
734 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
735
736 /* Reset the counters, if the channel changed */
737 if (state->last_frequency != c->frequency) {
738 memset(&c->strength, 0, sizeof(c->strength));
739 memset(&c->cnr, 0, sizeof(c->cnr));
740 memset(&c->pre_bit_error, 0, sizeof(c->pre_bit_error));
741 memset(&c->pre_bit_count, 0, sizeof(c->pre_bit_count));
742 memset(&c->post_bit_error, 0, sizeof(c->post_bit_error));
743 memset(&c->post_bit_count, 0, sizeof(c->post_bit_count));
744 memset(&c->block_error, 0, sizeof(c->block_error));
745 memset(&c->block_count, 0, sizeof(c->block_count));
746
747 state->last_frequency = c->frequency;
748 }
749
750 /* Clear status for most stats */
751
752 /* BER/PER counter reset */
753 rc = mb86a20s_writeregdata(state, mb86a20s_per_ber_reset);
754 if (rc < 0)
755 goto err;
756
757 /* CNR counter reset */
758 rc = mb86a20s_readreg(state, 0x45);
759 if (rc < 0)
760 goto err;
761 val = rc;
762 rc = mb86a20s_writereg(state, 0x45, val | 0x10);
763 if (rc < 0)
764 goto err;
765 rc = mb86a20s_writereg(state, 0x45, val & 0x6f);
766 if (rc < 0)
767 goto err;
768
769 /* MER counter reset */
770 rc = mb86a20s_writereg(state, 0x50, 0x50);
771 if (rc < 0)
772 goto err;
773 rc = mb86a20s_readreg(state, 0x51);
774 if (rc < 0)
775 goto err;
776 val = rc;
777 rc = mb86a20s_writereg(state, 0x51, val | 0x01);
778 if (rc < 0)
779 goto err;
780 rc = mb86a20s_writereg(state, 0x51, val & 0x06);
781 if (rc < 0)
782 goto err;
783
784 goto ok;
785 err:
786 dev_err(&state->i2c->dev,
787 "%s: Can't reset FE statistics (error %d).\n",
788 __func__, rc);
789 ok:
790 return rc;
791 }
792
793 static int mb86a20s_get_pre_ber(struct dvb_frontend *fe,
794 unsigned layer,
795 u32 *error, u32 *count)
796 {
797 struct mb86a20s_state *state = fe->demodulator_priv;
798 int rc, val;
799
800 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
801
802 if (layer >= 3)
803 return -EINVAL;
804
805 /* Check if the BER measures are already available */
806 rc = mb86a20s_readreg(state, 0x54);
807 if (rc < 0)
808 return rc;
809
810 /* Check if data is available for that layer */
811 if (!(rc & (1 << layer))) {
812 dev_dbg(&state->i2c->dev,
813 "%s: preBER for layer %c is not available yet.\n",
814 __func__, 'A' + layer);
815 return -EBUSY;
816 }
817
818 /* Read Bit Error Count */
819 rc = mb86a20s_readreg(state, 0x55 + layer * 3);
820 if (rc < 0)
821 return rc;
822 *error = rc << 16;
823 rc = mb86a20s_readreg(state, 0x56 + layer * 3);
824 if (rc < 0)
825 return rc;
826 *error |= rc << 8;
827 rc = mb86a20s_readreg(state, 0x57 + layer * 3);
828 if (rc < 0)
829 return rc;
830 *error |= rc;
831
832 dev_dbg(&state->i2c->dev,
833 "%s: bit error before Viterbi for layer %c: %d.\n",
834 __func__, 'A' + layer, *error);
835
836 /* Read Bit Count */
837 rc = mb86a20s_writereg(state, 0x50, 0xa7 + layer * 3);
838 if (rc < 0)
839 return rc;
840 rc = mb86a20s_readreg(state, 0x51);
841 if (rc < 0)
842 return rc;
843 *count = rc << 16;
844 rc = mb86a20s_writereg(state, 0x50, 0xa8 + layer * 3);
845 if (rc < 0)
846 return rc;
847 rc = mb86a20s_readreg(state, 0x51);
848 if (rc < 0)
849 return rc;
850 *count |= rc << 8;
851 rc = mb86a20s_writereg(state, 0x50, 0xa9 + layer * 3);
852 if (rc < 0)
853 return rc;
854 rc = mb86a20s_readreg(state, 0x51);
855 if (rc < 0)
856 return rc;
857 *count |= rc;
858
859 dev_dbg(&state->i2c->dev,
860 "%s: bit count before Viterbi for layer %c: %d.\n",
861 __func__, 'A' + layer, *count);
862
863
864 /*
865 * As we get TMCC data from the frontend, we can better estimate the
866 * BER bit counters, in order to do the BER measure during a longer
867 * time. Use those data, if available, to update the bit count
868 * measure.
869 */
870
871 if (state->estimated_rate[layer]
872 && state->estimated_rate[layer] != *count) {
873 dev_dbg(&state->i2c->dev,
874 "%s: updating layer %c preBER counter to %d.\n",
875 __func__, 'A' + layer, state->estimated_rate[layer]);
876
877 /* Turn off BER before Viterbi */
878 rc = mb86a20s_writereg(state, 0x52, 0x00);
879
880 /* Update counter for this layer */
881 rc = mb86a20s_writereg(state, 0x50, 0xa7 + layer * 3);
882 if (rc < 0)
883 return rc;
884 rc = mb86a20s_writereg(state, 0x51,
885 state->estimated_rate[layer] >> 16);
886 if (rc < 0)
887 return rc;
888 rc = mb86a20s_writereg(state, 0x50, 0xa8 + layer * 3);
889 if (rc < 0)
890 return rc;
891 rc = mb86a20s_writereg(state, 0x51,
892 state->estimated_rate[layer] >> 8);
893 if (rc < 0)
894 return rc;
895 rc = mb86a20s_writereg(state, 0x50, 0xa9 + layer * 3);
896 if (rc < 0)
897 return rc;
898 rc = mb86a20s_writereg(state, 0x51,
899 state->estimated_rate[layer]);
900 if (rc < 0)
901 return rc;
902
903 /* Turn on BER before Viterbi */
904 rc = mb86a20s_writereg(state, 0x52, 0x01);
905
906 /* Reset all preBER counters */
907 rc = mb86a20s_writereg(state, 0x53, 0x00);
908 if (rc < 0)
909 return rc;
910 rc = mb86a20s_writereg(state, 0x53, 0x07);
911 } else {
912 /* Reset counter to collect new data */
913 rc = mb86a20s_readreg(state, 0x53);
914 if (rc < 0)
915 return rc;
916 val = rc;
917 rc = mb86a20s_writereg(state, 0x53, val & ~(1 << layer));
918 if (rc < 0)
919 return rc;
920 rc = mb86a20s_writereg(state, 0x53, val | (1 << layer));
921 }
922
923 return rc;
924 }
925
926 static int mb86a20s_get_post_ber(struct dvb_frontend *fe,
927 unsigned layer,
928 u32 *error, u32 *count)
929 {
930 struct mb86a20s_state *state = fe->demodulator_priv;
931 u32 counter, collect_rate;
932 int rc, val;
933
934 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
935
936 if (layer >= 3)
937 return -EINVAL;
938
939 /* Check if the BER measures are already available */
940 rc = mb86a20s_readreg(state, 0x60);
941 if (rc < 0)
942 return rc;
943
944 /* Check if data is available for that layer */
945 if (!(rc & (1 << layer))) {
946 dev_dbg(&state->i2c->dev,
947 "%s: post BER for layer %c is not available yet.\n",
948 __func__, 'A' + layer);
949 return -EBUSY;
950 }
951
952 /* Read Bit Error Count */
953 rc = mb86a20s_readreg(state, 0x64 + layer * 3);
954 if (rc < 0)
955 return rc;
956 *error = rc << 16;
957 rc = mb86a20s_readreg(state, 0x65 + layer * 3);
958 if (rc < 0)
959 return rc;
960 *error |= rc << 8;
961 rc = mb86a20s_readreg(state, 0x66 + layer * 3);
962 if (rc < 0)
963 return rc;
964 *error |= rc;
965
966 dev_dbg(&state->i2c->dev,
967 "%s: post bit error for layer %c: %d.\n",
968 __func__, 'A' + layer, *error);
969
970 /* Read Bit Count */
971 rc = mb86a20s_writereg(state, 0x50, 0xdc + layer * 2);
972 if (rc < 0)
973 return rc;
974 rc = mb86a20s_readreg(state, 0x51);
975 if (rc < 0)
976 return rc;
977 counter = rc << 8;
978 rc = mb86a20s_writereg(state, 0x50, 0xdd + layer * 2);
979 if (rc < 0)
980 return rc;
981 rc = mb86a20s_readreg(state, 0x51);
982 if (rc < 0)
983 return rc;
984 counter |= rc;
985 *count = counter * 204 * 8;
986
987 dev_dbg(&state->i2c->dev,
988 "%s: post bit count for layer %c: %d.\n",
989 __func__, 'A' + layer, *count);
990
991 /*
992 * As we get TMCC data from the frontend, we can better estimate the
993 * BER bit counters, in order to do the BER measure during a longer
994 * time. Use those data, if available, to update the bit count
995 * measure.
996 */
997
998 if (!state->estimated_rate[layer])
999 goto reset_measurement;
1000
1001 collect_rate = state->estimated_rate[layer] / 204 / 8;
1002 if (collect_rate < 32)
1003 collect_rate = 32;
1004 if (collect_rate > 65535)
1005 collect_rate = 65535;
1006 if (collect_rate != counter) {
1007 dev_dbg(&state->i2c->dev,
1008 "%s: updating postBER counter on layer %c to %d.\n",
1009 __func__, 'A' + layer, collect_rate);
1010
1011 /* Turn off BER after Viterbi */
1012 rc = mb86a20s_writereg(state, 0x5e, 0x00);
1013
1014 /* Update counter for this layer */
1015 rc = mb86a20s_writereg(state, 0x50, 0xdc + layer * 2);
1016 if (rc < 0)
1017 return rc;
1018 rc = mb86a20s_writereg(state, 0x51, collect_rate >> 8);
1019 if (rc < 0)
1020 return rc;
1021 rc = mb86a20s_writereg(state, 0x50, 0xdd + layer * 2);
1022 if (rc < 0)
1023 return rc;
1024 rc = mb86a20s_writereg(state, 0x51, collect_rate & 0xff);
1025 if (rc < 0)
1026 return rc;
1027
1028 /* Turn on BER after Viterbi */
1029 rc = mb86a20s_writereg(state, 0x5e, 0x07);
1030
1031 /* Reset all preBER counters */
1032 rc = mb86a20s_writereg(state, 0x5f, 0x00);
1033 if (rc < 0)
1034 return rc;
1035 rc = mb86a20s_writereg(state, 0x5f, 0x07);
1036
1037 return rc;
1038 }
1039
1040 reset_measurement:
1041 /* Reset counter to collect new data */
1042 rc = mb86a20s_readreg(state, 0x5f);
1043 if (rc < 0)
1044 return rc;
1045 val = rc;
1046 rc = mb86a20s_writereg(state, 0x5f, val & ~(1 << layer));
1047 if (rc < 0)
1048 return rc;
1049 rc = mb86a20s_writereg(state, 0x5f, val | (1 << layer));
1050
1051 return rc;
1052 }
1053
1054 static int mb86a20s_get_blk_error(struct dvb_frontend *fe,
1055 unsigned layer,
1056 u32 *error, u32 *count)
1057 {
1058 struct mb86a20s_state *state = fe->demodulator_priv;
1059 int rc, val;
1060 u32 collect_rate;
1061 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1062
1063 if (layer >= 3)
1064 return -EINVAL;
1065
1066 /* Check if the PER measures are already available */
1067 rc = mb86a20s_writereg(state, 0x50, 0xb8);
1068 if (rc < 0)
1069 return rc;
1070 rc = mb86a20s_readreg(state, 0x51);
1071 if (rc < 0)
1072 return rc;
1073
1074 /* Check if data is available for that layer */
1075
1076 if (!(rc & (1 << layer))) {
1077 dev_dbg(&state->i2c->dev,
1078 "%s: block counts for layer %c aren't available yet.\n",
1079 __func__, 'A' + layer);
1080 return -EBUSY;
1081 }
1082
1083 /* Read Packet error Count */
1084 rc = mb86a20s_writereg(state, 0x50, 0xb9 + layer * 2);
1085 if (rc < 0)
1086 return rc;
1087 rc = mb86a20s_readreg(state, 0x51);
1088 if (rc < 0)
1089 return rc;
1090 *error = rc << 8;
1091 rc = mb86a20s_writereg(state, 0x50, 0xba + layer * 2);
1092 if (rc < 0)
1093 return rc;
1094 rc = mb86a20s_readreg(state, 0x51);
1095 if (rc < 0)
1096 return rc;
1097 *error |= rc;
1098 dev_err(&state->i2c->dev, "%s: block error for layer %c: %d.\n",
1099 __func__, 'A' + layer, *error);
1100
1101 /* Read Bit Count */
1102 rc = mb86a20s_writereg(state, 0x50, 0xb2 + layer * 2);
1103 if (rc < 0)
1104 return rc;
1105 rc = mb86a20s_readreg(state, 0x51);
1106 if (rc < 0)
1107 return rc;
1108 *count = rc << 8;
1109 rc = mb86a20s_writereg(state, 0x50, 0xb3 + layer * 2);
1110 if (rc < 0)
1111 return rc;
1112 rc = mb86a20s_readreg(state, 0x51);
1113 if (rc < 0)
1114 return rc;
1115 *count |= rc;
1116
1117 dev_dbg(&state->i2c->dev,
1118 "%s: block count for layer %c: %d.\n",
1119 __func__, 'A' + layer, *count);
1120
1121 /*
1122 * As we get TMCC data from the frontend, we can better estimate the
1123 * BER bit counters, in order to do the BER measure during a longer
1124 * time. Use those data, if available, to update the bit count
1125 * measure.
1126 */
1127
1128 if (!state->estimated_rate[layer])
1129 goto reset_measurement;
1130
1131 collect_rate = state->estimated_rate[layer] / 204 / 8;
1132 if (collect_rate < 32)
1133 collect_rate = 32;
1134 if (collect_rate > 65535)
1135 collect_rate = 65535;
1136
1137 if (collect_rate != *count) {
1138 dev_dbg(&state->i2c->dev,
1139 "%s: updating PER counter on layer %c to %d.\n",
1140 __func__, 'A' + layer, collect_rate);
1141
1142 /* Stop PER measurement */
1143 rc = mb86a20s_writereg(state, 0x50, 0xb0);
1144 if (rc < 0)
1145 return rc;
1146 rc = mb86a20s_writereg(state, 0x51, 0x00);
1147 if (rc < 0)
1148 return rc;
1149
1150 /* Update this layer's counter */
1151 rc = mb86a20s_writereg(state, 0x50, 0xb2 + layer * 2);
1152 if (rc < 0)
1153 return rc;
1154 rc = mb86a20s_writereg(state, 0x51, collect_rate >> 8);
1155 if (rc < 0)
1156 return rc;
1157 rc = mb86a20s_writereg(state, 0x50, 0xb3 + layer * 2);
1158 if (rc < 0)
1159 return rc;
1160 rc = mb86a20s_writereg(state, 0x51, collect_rate & 0xff);
1161 if (rc < 0)
1162 return rc;
1163
1164 /* start PER measurement */
1165 rc = mb86a20s_writereg(state, 0x50, 0xb0);
1166 if (rc < 0)
1167 return rc;
1168 rc = mb86a20s_writereg(state, 0x51, 0x07);
1169 if (rc < 0)
1170 return rc;
1171
1172 /* Reset all counters to collect new data */
1173 rc = mb86a20s_writereg(state, 0x50, 0xb1);
1174 if (rc < 0)
1175 return rc;
1176 rc = mb86a20s_writereg(state, 0x51, 0x07);
1177 if (rc < 0)
1178 return rc;
1179 rc = mb86a20s_writereg(state, 0x51, 0x00);
1180
1181 return rc;
1182 }
1183
1184 reset_measurement:
1185 /* Reset counter to collect new data */
1186 rc = mb86a20s_writereg(state, 0x50, 0xb1);
1187 if (rc < 0)
1188 return rc;
1189 rc = mb86a20s_readreg(state, 0x51);
1190 if (rc < 0)
1191 return rc;
1192 val = rc;
1193 rc = mb86a20s_writereg(state, 0x51, val | (1 << layer));
1194 if (rc < 0)
1195 return rc;
1196 rc = mb86a20s_writereg(state, 0x51, val & ~(1 << layer));
1197
1198 return rc;
1199 }
1200
1201 struct linear_segments {
1202 unsigned x, y;
1203 };
1204
1205 /*
1206 * All tables below return a dB/1000 measurement
1207 */
1208
1209 static struct linear_segments cnr_to_db_table[] = {
1210 { 19648, 0},
1211 { 18187, 1000},
1212 { 16534, 2000},
1213 { 14823, 3000},
1214 { 13161, 4000},
1215 { 11622, 5000},
1216 { 10279, 6000},
1217 { 9089, 7000},
1218 { 8042, 8000},
1219 { 7137, 9000},
1220 { 6342, 10000},
1221 { 5641, 11000},
1222 { 5030, 12000},
1223 { 4474, 13000},
1224 { 3988, 14000},
1225 { 3556, 15000},
1226 { 3180, 16000},
1227 { 2841, 17000},
1228 { 2541, 18000},
1229 { 2276, 19000},
1230 { 2038, 20000},
1231 { 1800, 21000},
1232 { 1625, 22000},
1233 { 1462, 23000},
1234 { 1324, 24000},
1235 { 1175, 25000},
1236 { 1063, 26000},
1237 { 980, 27000},
1238 { 907, 28000},
1239 { 840, 29000},
1240 { 788, 30000},
1241 };
1242
1243 static struct linear_segments cnr_64qam_table[] = {
1244 { 3922688, 0},
1245 { 3920384, 1000},
1246 { 3902720, 2000},
1247 { 3894784, 3000},
1248 { 3882496, 4000},
1249 { 3872768, 5000},
1250 { 3858944, 6000},
1251 { 3851520, 7000},
1252 { 3838976, 8000},
1253 { 3829248, 9000},
1254 { 3818240, 10000},
1255 { 3806976, 11000},
1256 { 3791872, 12000},
1257 { 3767040, 13000},
1258 { 3720960, 14000},
1259 { 3637504, 15000},
1260 { 3498496, 16000},
1261 { 3296000, 17000},
1262 { 3031040, 18000},
1263 { 2715392, 19000},
1264 { 2362624, 20000},
1265 { 1963264, 21000},
1266 { 1649664, 22000},
1267 { 1366784, 23000},
1268 { 1120768, 24000},
1269 { 890880, 25000},
1270 { 723456, 26000},
1271 { 612096, 27000},
1272 { 518912, 28000},
1273 { 448256, 29000},
1274 { 388864, 30000},
1275 };
1276
1277 static struct linear_segments cnr_16qam_table[] = {
1278 { 5314816, 0},
1279 { 5219072, 1000},
1280 { 5118720, 2000},
1281 { 4998912, 3000},
1282 { 4875520, 4000},
1283 { 4736000, 5000},
1284 { 4604160, 6000},
1285 { 4458752, 7000},
1286 { 4300288, 8000},
1287 { 4092928, 9000},
1288 { 3836160, 10000},
1289 { 3521024, 11000},
1290 { 3155968, 12000},
1291 { 2756864, 13000},
1292 { 2347008, 14000},
1293 { 1955072, 15000},
1294 { 1593600, 16000},
1295 { 1297920, 17000},
1296 { 1043968, 18000},
1297 { 839680, 19000},
1298 { 672256, 20000},
1299 { 523008, 21000},
1300 { 424704, 22000},
1301 { 345088, 23000},
1302 { 280064, 24000},
1303 { 221440, 25000},
1304 { 179712, 26000},
1305 { 151040, 27000},
1306 { 128512, 28000},
1307 { 110080, 29000},
1308 { 95744, 30000},
1309 };
1310
1311 struct linear_segments cnr_qpsk_table[] = {
1312 { 2834176, 0},
1313 { 2683648, 1000},
1314 { 2536960, 2000},
1315 { 2391808, 3000},
1316 { 2133248, 4000},
1317 { 1906176, 5000},
1318 { 1666560, 6000},
1319 { 1422080, 7000},
1320 { 1189632, 8000},
1321 { 976384, 9000},
1322 { 790272, 10000},
1323 { 633344, 11000},
1324 { 505600, 12000},
1325 { 402944, 13000},
1326 { 320768, 14000},
1327 { 255488, 15000},
1328 { 204032, 16000},
1329 { 163072, 17000},
1330 { 130304, 18000},
1331 { 105216, 19000},
1332 { 83456, 20000},
1333 { 65024, 21000},
1334 { 52480, 22000},
1335 { 42752, 23000},
1336 { 34560, 24000},
1337 { 27136, 25000},
1338 { 22016, 26000},
1339 { 18432, 27000},
1340 { 15616, 28000},
1341 { 13312, 29000},
1342 { 11520, 30000},
1343 };
1344
1345 static u32 interpolate_value(u32 value, struct linear_segments *segments,
1346 unsigned len)
1347 {
1348 u64 tmp64;
1349 u32 dx, dy;
1350 int i, ret;
1351
1352 if (value >= segments[0].x)
1353 return segments[0].y;
1354 if (value < segments[len-1].x)
1355 return segments[len-1].y;
1356
1357 for (i = 1; i < len - 1; i++) {
1358 /* If value is identical, no need to interpolate */
1359 if (value == segments[i].x)
1360 return segments[i].y;
1361 if (value > segments[i].x)
1362 break;
1363 }
1364
1365 /* Linear interpolation between the two (x,y) points */
1366 dy = segments[i].y - segments[i - 1].y;
1367 dx = segments[i - 1].x - segments[i].x;
1368 tmp64 = value - segments[i].x;
1369 tmp64 *= dy;
1370 do_div(tmp64, dx);
1371 ret = segments[i].y - tmp64;
1372
1373 return ret;
1374 }
1375
1376 static int mb86a20s_get_main_CNR(struct dvb_frontend *fe)
1377 {
1378 struct mb86a20s_state *state = fe->demodulator_priv;
1379 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1380 u32 cnr_linear, cnr;
1381 int rc, val;
1382
1383 /* Check if CNR is available */
1384 rc = mb86a20s_readreg(state, 0x45);
1385 if (rc < 0)
1386 return rc;
1387
1388 if (!(rc & 0x40)) {
1389 dev_info(&state->i2c->dev, "%s: CNR is not available yet.\n",
1390 __func__);
1391 return -EBUSY;
1392 }
1393 val = rc;
1394
1395 rc = mb86a20s_readreg(state, 0x46);
1396 if (rc < 0)
1397 return rc;
1398 cnr_linear = rc << 8;
1399
1400 rc = mb86a20s_readreg(state, 0x46);
1401 if (rc < 0)
1402 return rc;
1403 cnr_linear |= rc;
1404
1405 cnr = interpolate_value(cnr_linear,
1406 cnr_to_db_table, ARRAY_SIZE(cnr_to_db_table));
1407
1408 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1409 c->cnr.stat[0].svalue = cnr;
1410
1411 dev_dbg(&state->i2c->dev, "%s: CNR is %d.%03d dB (%d)\n",
1412 __func__, cnr / 1000, cnr % 1000, cnr_linear);
1413
1414 /* CNR counter reset */
1415 rc = mb86a20s_writereg(state, 0x45, val | 0x10);
1416 if (rc < 0)
1417 return rc;
1418 rc = mb86a20s_writereg(state, 0x45, val & 0x6f);
1419
1420 return rc;
1421 }
1422
1423 static int mb86a20s_get_blk_error_layer_CNR(struct dvb_frontend *fe)
1424 {
1425 struct mb86a20s_state *state = fe->demodulator_priv;
1426 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1427 u32 mer, cnr;
1428 int rc, val, i;
1429 struct linear_segments *segs;
1430 unsigned segs_len;
1431
1432 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1433
1434 /* Check if the measures are already available */
1435 rc = mb86a20s_writereg(state, 0x50, 0x5b);
1436 if (rc < 0)
1437 return rc;
1438 rc = mb86a20s_readreg(state, 0x51);
1439 if (rc < 0)
1440 return rc;
1441
1442 /* Check if data is available */
1443 if (!(rc & 0x01)) {
1444 dev_info(&state->i2c->dev,
1445 "%s: MER measures aren't available yet.\n", __func__);
1446 return -EBUSY;
1447 }
1448
1449 /* Read all layers */
1450 for (i = 0; i < 3; i++) {
1451 if (!(c->isdbt_layer_enabled & (1 << i))) {
1452 c->cnr.stat[1 + i].scale = FE_SCALE_NOT_AVAILABLE;
1453 continue;
1454 }
1455
1456 rc = mb86a20s_writereg(state, 0x50, 0x52 + i * 3);
1457 if (rc < 0)
1458 return rc;
1459 rc = mb86a20s_readreg(state, 0x51);
1460 if (rc < 0)
1461 return rc;
1462 mer = rc << 16;
1463 rc = mb86a20s_writereg(state, 0x50, 0x53 + i * 3);
1464 if (rc < 0)
1465 return rc;
1466 rc = mb86a20s_readreg(state, 0x51);
1467 if (rc < 0)
1468 return rc;
1469 mer |= rc << 8;
1470 rc = mb86a20s_writereg(state, 0x50, 0x54 + i * 3);
1471 if (rc < 0)
1472 return rc;
1473 rc = mb86a20s_readreg(state, 0x51);
1474 if (rc < 0)
1475 return rc;
1476 mer |= rc;
1477
1478 switch (c->layer[i].modulation) {
1479 case DQPSK:
1480 case QPSK:
1481 segs = cnr_qpsk_table;
1482 segs_len = ARRAY_SIZE(cnr_qpsk_table);
1483 break;
1484 case QAM_16:
1485 segs = cnr_16qam_table;
1486 segs_len = ARRAY_SIZE(cnr_16qam_table);
1487 break;
1488 default:
1489 case QAM_64:
1490 segs = cnr_64qam_table;
1491 segs_len = ARRAY_SIZE(cnr_64qam_table);
1492 break;
1493 }
1494 cnr = interpolate_value(mer, segs, segs_len);
1495
1496 c->cnr.stat[1 + i].scale = FE_SCALE_DECIBEL;
1497 c->cnr.stat[1 + i].svalue = cnr;
1498
1499 dev_dbg(&state->i2c->dev,
1500 "%s: CNR for layer %c is %d.%03d dB (MER = %d).\n",
1501 __func__, 'A' + i, cnr / 1000, cnr % 1000, mer);
1502
1503 }
1504
1505 /* Start a new MER measurement */
1506 /* MER counter reset */
1507 rc = mb86a20s_writereg(state, 0x50, 0x50);
1508 if (rc < 0)
1509 return rc;
1510 rc = mb86a20s_readreg(state, 0x51);
1511 if (rc < 0)
1512 return rc;
1513 val = rc;
1514
1515 rc = mb86a20s_writereg(state, 0x51, val | 0x01);
1516 if (rc < 0)
1517 return rc;
1518 rc = mb86a20s_writereg(state, 0x51, val & 0x06);
1519 if (rc < 0)
1520 return rc;
1521
1522 return 0;
1523 }
1524
1525 static void mb86a20s_stats_not_ready(struct dvb_frontend *fe)
1526 {
1527 struct mb86a20s_state *state = fe->demodulator_priv;
1528 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1529 int i;
1530
1531 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1532
1533 /* Fill the length of each status counter */
1534
1535 /* Only global stats */
1536 c->strength.len = 1;
1537
1538 /* Per-layer stats - 3 layers + global */
1539 c->cnr.len = 4;
1540 c->pre_bit_error.len = 4;
1541 c->pre_bit_count.len = 4;
1542 c->post_bit_error.len = 4;
1543 c->post_bit_count.len = 4;
1544 c->block_error.len = 4;
1545 c->block_count.len = 4;
1546
1547 /* Signal is always available */
1548 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
1549 c->strength.stat[0].uvalue = 0;
1550
1551 /* Put all of them at FE_SCALE_NOT_AVAILABLE */
1552 for (i = 0; i < 4; i++) {
1553 c->cnr.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
1554 c->pre_bit_error.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
1555 c->pre_bit_count.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
1556 c->post_bit_error.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
1557 c->post_bit_count.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
1558 c->block_error.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
1559 c->block_count.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
1560 }
1561 }
1562
1563 static int mb86a20s_get_stats(struct dvb_frontend *fe)
1564 {
1565 struct mb86a20s_state *state = fe->demodulator_priv;
1566 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1567 int rc = 0, i;
1568 u32 bit_error = 0, bit_count = 0;
1569 u32 t_pre_bit_error = 0, t_pre_bit_count = 0;
1570 u32 t_post_bit_error = 0, t_post_bit_count = 0;
1571 u32 block_error = 0, block_count = 0;
1572 u32 t_block_error = 0, t_block_count = 0;
1573 int active_layers = 0, pre_ber_layers = 0, post_ber_layers = 0;
1574 int per_layers = 0;
1575
1576 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1577
1578 mb86a20s_get_main_CNR(fe);
1579
1580 /* Get per-layer stats */
1581 mb86a20s_get_blk_error_layer_CNR(fe);
1582
1583 for (i = 0; i < 3; i++) {
1584 if (c->isdbt_layer_enabled & (1 << i)) {
1585 /* Layer is active and has rc segments */
1586 active_layers++;
1587
1588 /* Handle BER before vterbi */
1589 rc = mb86a20s_get_pre_ber(fe, i,
1590 &bit_error, &bit_count);
1591 if (rc >= 0) {
1592 c->pre_bit_error.stat[1 + i].scale = FE_SCALE_COUNTER;
1593 c->pre_bit_error.stat[1 + i].uvalue += bit_error;
1594 c->pre_bit_count.stat[1 + i].scale = FE_SCALE_COUNTER;
1595 c->pre_bit_count.stat[1 + i].uvalue += bit_count;
1596 } else if (rc != -EBUSY) {
1597 /*
1598 * If an I/O error happened,
1599 * measures are now unavailable
1600 */
1601 c->pre_bit_error.stat[1 + i].scale = FE_SCALE_NOT_AVAILABLE;
1602 c->pre_bit_count.stat[1 + i].scale = FE_SCALE_NOT_AVAILABLE;
1603 dev_err(&state->i2c->dev,
1604 "%s: Can't get BER for layer %c (error %d).\n",
1605 __func__, 'A' + i, rc);
1606 }
1607 if (c->block_error.stat[1 + i].scale != FE_SCALE_NOT_AVAILABLE)
1608 pre_ber_layers++;
1609
1610 /* Handle BER post vterbi */
1611 rc = mb86a20s_get_post_ber(fe, i,
1612 &bit_error, &bit_count);
1613 if (rc >= 0) {
1614 c->post_bit_error.stat[1 + i].scale = FE_SCALE_COUNTER;
1615 c->post_bit_error.stat[1 + i].uvalue += bit_error;
1616 c->post_bit_count.stat[1 + i].scale = FE_SCALE_COUNTER;
1617 c->post_bit_count.stat[1 + i].uvalue += bit_count;
1618 } else if (rc != -EBUSY) {
1619 /*
1620 * If an I/O error happened,
1621 * measures are now unavailable
1622 */
1623 c->post_bit_error.stat[1 + i].scale = FE_SCALE_NOT_AVAILABLE;
1624 c->post_bit_count.stat[1 + i].scale = FE_SCALE_NOT_AVAILABLE;
1625 dev_err(&state->i2c->dev,
1626 "%s: Can't get BER for layer %c (error %d).\n",
1627 __func__, 'A' + i, rc);
1628 }
1629 if (c->block_error.stat[1 + i].scale != FE_SCALE_NOT_AVAILABLE)
1630 post_ber_layers++;
1631
1632 /* Handle Block errors for PER/UCB reports */
1633 rc = mb86a20s_get_blk_error(fe, i,
1634 &block_error,
1635 &block_count);
1636 if (rc >= 0) {
1637 c->block_error.stat[1 + i].scale = FE_SCALE_COUNTER;
1638 c->block_error.stat[1 + i].uvalue += block_error;
1639 c->block_count.stat[1 + i].scale = FE_SCALE_COUNTER;
1640 c->block_count.stat[1 + i].uvalue += block_count;
1641 } else if (rc != -EBUSY) {
1642 /*
1643 * If an I/O error happened,
1644 * measures are now unavailable
1645 */
1646 c->block_error.stat[1 + i].scale = FE_SCALE_NOT_AVAILABLE;
1647 c->block_count.stat[1 + i].scale = FE_SCALE_NOT_AVAILABLE;
1648 dev_err(&state->i2c->dev,
1649 "%s: Can't get PER for layer %c (error %d).\n",
1650 __func__, 'A' + i, rc);
1651
1652 }
1653 if (c->block_error.stat[1 + i].scale != FE_SCALE_NOT_AVAILABLE)
1654 per_layers++;
1655
1656 /* Update total preBER */
1657 t_pre_bit_error += c->pre_bit_error.stat[1 + i].uvalue;
1658 t_pre_bit_count += c->pre_bit_count.stat[1 + i].uvalue;
1659
1660 /* Update total postBER */
1661 t_post_bit_error += c->post_bit_error.stat[1 + i].uvalue;
1662 t_post_bit_count += c->post_bit_count.stat[1 + i].uvalue;
1663
1664 /* Update total PER */
1665 t_block_error += c->block_error.stat[1 + i].uvalue;
1666 t_block_count += c->block_count.stat[1 + i].uvalue;
1667 }
1668 }
1669
1670 /*
1671 * Start showing global count if at least one error count is
1672 * available.
1673 */
1674 if (pre_ber_layers) {
1675 /*
1676 * At least one per-layer BER measure was read. We can now
1677 * calculate the total BER
1678 *
1679 * Total Bit Error/Count is calculated as the sum of the
1680 * bit errors on all active layers.
1681 */
1682 c->pre_bit_error.stat[0].scale = FE_SCALE_COUNTER;
1683 c->pre_bit_error.stat[0].uvalue = t_pre_bit_error;
1684 c->pre_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1685 c->pre_bit_count.stat[0].uvalue = t_pre_bit_count;
1686 } else {
1687 c->pre_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1688 c->pre_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1689 }
1690
1691 /*
1692 * Start showing global count if at least one error count is
1693 * available.
1694 */
1695 if (post_ber_layers) {
1696 /*
1697 * At least one per-layer BER measure was read. We can now
1698 * calculate the total BER
1699 *
1700 * Total Bit Error/Count is calculated as the sum of the
1701 * bit errors on all active layers.
1702 */
1703 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
1704 c->post_bit_error.stat[0].uvalue = t_post_bit_error;
1705 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1706 c->post_bit_count.stat[0].uvalue = t_post_bit_count;
1707 } else {
1708 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1709 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1710 }
1711
1712 if (per_layers) {
1713 /*
1714 * At least one per-layer UCB measure was read. We can now
1715 * calculate the total UCB
1716 *
1717 * Total block Error/Count is calculated as the sum of the
1718 * block errors on all active layers.
1719 */
1720 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
1721 c->block_error.stat[0].uvalue = t_block_error;
1722 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
1723 c->block_count.stat[0].uvalue = t_block_count;
1724 } else {
1725 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1726 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
1727 }
1728
1729 return rc;
1730 }
1731
1732 /*
1733 * The functions below are called via DVB callbacks, so they need to
1734 * properly use the I2C gate control
1735 */
1736
1737 static int mb86a20s_initfe(struct dvb_frontend *fe)
1738 {
1739 struct mb86a20s_state *state = fe->demodulator_priv;
1740 int rc;
1741 u8 regD5 = 1;
1742
1743 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1744
1745 if (fe->ops.i2c_gate_ctrl)
1746 fe->ops.i2c_gate_ctrl(fe, 0);
1747
1748 /* Initialize the frontend */
1749 rc = mb86a20s_writeregdata(state, mb86a20s_init);
1750 if (rc < 0)
1751 goto err;
1752
1753 if (!state->config->is_serial) {
1754 regD5 &= ~1;
1755
1756 rc = mb86a20s_writereg(state, 0x50, 0xd5);
1757 if (rc < 0)
1758 goto err;
1759 rc = mb86a20s_writereg(state, 0x51, regD5);
1760 if (rc < 0)
1761 goto err;
1762 }
1763
1764 err:
1765 if (fe->ops.i2c_gate_ctrl)
1766 fe->ops.i2c_gate_ctrl(fe, 1);
1767
1768 if (rc < 0) {
1769 state->need_init = true;
1770 dev_info(&state->i2c->dev,
1771 "mb86a20s: Init failed. Will try again later\n");
1772 } else {
1773 state->need_init = false;
1774 dev_dbg(&state->i2c->dev, "Initialization succeeded.\n");
1775 }
1776 return rc;
1777 }
1778
1779 static int mb86a20s_set_frontend(struct dvb_frontend *fe)
1780 {
1781 struct mb86a20s_state *state = fe->demodulator_priv;
1782 int rc;
1783 #if 0
1784 /*
1785 * FIXME: Properly implement the set frontend properties
1786 */
1787 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1788 #endif
1789 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1790
1791 /*
1792 * Gate should already be opened, but it doesn't hurt to
1793 * double-check
1794 */
1795 if (fe->ops.i2c_gate_ctrl)
1796 fe->ops.i2c_gate_ctrl(fe, 1);
1797 fe->ops.tuner_ops.set_params(fe);
1798
1799 /*
1800 * Make it more reliable: if, for some reason, the initial
1801 * device initialization doesn't happen, initialize it when
1802 * a SBTVD parameters are adjusted.
1803 *
1804 * Unfortunately, due to a hard to track bug at tda829x/tda18271,
1805 * the agc callback logic is not called during DVB attach time,
1806 * causing mb86a20s to not be initialized with Kworld SBTVD.
1807 * So, this hack is needed, in order to make Kworld SBTVD to work.
1808 */
1809 if (state->need_init)
1810 mb86a20s_initfe(fe);
1811
1812 if (fe->ops.i2c_gate_ctrl)
1813 fe->ops.i2c_gate_ctrl(fe, 0);
1814
1815 rc = mb86a20s_writeregdata(state, mb86a20s_reset_reception);
1816 mb86a20s_reset_counters(fe);
1817
1818 if (fe->ops.i2c_gate_ctrl)
1819 fe->ops.i2c_gate_ctrl(fe, 1);
1820
1821 return rc;
1822 }
1823
1824 static int mb86a20s_read_status_and_stats(struct dvb_frontend *fe,
1825 fe_status_t *status)
1826 {
1827 struct mb86a20s_state *state = fe->demodulator_priv;
1828 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1829 int rc;
1830
1831 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1832
1833 if (fe->ops.i2c_gate_ctrl)
1834 fe->ops.i2c_gate_ctrl(fe, 0);
1835
1836 /* Get lock */
1837 rc = mb86a20s_read_status(fe, status);
1838 if (!(*status & FE_HAS_LOCK)) {
1839 mb86a20s_stats_not_ready(fe);
1840 mb86a20s_reset_frontend_cache(fe);
1841 }
1842 if (rc < 0) {
1843 dev_err(&state->i2c->dev,
1844 "%s: Can't read frontend lock status\n", __func__);
1845 goto error;
1846 }
1847
1848 /* Get signal strength */
1849 rc = mb86a20s_read_signal_strength(fe);
1850 if (rc < 0) {
1851 dev_err(&state->i2c->dev,
1852 "%s: Can't reset VBER registers.\n", __func__);
1853 mb86a20s_stats_not_ready(fe);
1854 mb86a20s_reset_frontend_cache(fe);
1855
1856 rc = 0; /* Status is OK */
1857 goto error;
1858 }
1859 /* Fill signal strength */
1860 c->strength.stat[0].uvalue = rc;
1861
1862 if (*status & FE_HAS_LOCK) {
1863 /* Get TMCC info*/
1864 rc = mb86a20s_get_frontend(fe);
1865 if (rc < 0) {
1866 dev_err(&state->i2c->dev,
1867 "%s: Can't get FE TMCC data.\n", __func__);
1868 rc = 0; /* Status is OK */
1869 goto error;
1870 }
1871
1872 /* Get statistics */
1873 rc = mb86a20s_get_stats(fe);
1874 if (rc < 0 && rc != -EBUSY) {
1875 dev_err(&state->i2c->dev,
1876 "%s: Can't get FE statistics.\n", __func__);
1877 rc = 0;
1878 goto error;
1879 }
1880 rc = 0; /* Don't return EBUSY to userspace */
1881 }
1882 goto ok;
1883
1884 error:
1885 mb86a20s_stats_not_ready(fe);
1886
1887 ok:
1888 if (fe->ops.i2c_gate_ctrl)
1889 fe->ops.i2c_gate_ctrl(fe, 1);
1890
1891 return rc;
1892 }
1893
1894 static int mb86a20s_read_signal_strength_from_cache(struct dvb_frontend *fe,
1895 u16 *strength)
1896 {
1897 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1898
1899
1900 *strength = c->strength.stat[0].uvalue;
1901
1902 return 0;
1903 }
1904
1905 static int mb86a20s_get_frontend_dummy(struct dvb_frontend *fe)
1906 {
1907 /*
1908 * get_frontend is now handled together with other stats
1909 * retrival, when read_status() is called, as some statistics
1910 * will depend on the layers detection.
1911 */
1912 return 0;
1913 };
1914
1915 static int mb86a20s_tune(struct dvb_frontend *fe,
1916 bool re_tune,
1917 unsigned int mode_flags,
1918 unsigned int *delay,
1919 fe_status_t *status)
1920 {
1921 struct mb86a20s_state *state = fe->demodulator_priv;
1922 int rc = 0;
1923
1924 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1925
1926 if (re_tune)
1927 rc = mb86a20s_set_frontend(fe);
1928
1929 if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
1930 mb86a20s_read_status_and_stats(fe, status);
1931
1932 return rc;
1933 }
1934
1935 static void mb86a20s_release(struct dvb_frontend *fe)
1936 {
1937 struct mb86a20s_state *state = fe->demodulator_priv;
1938
1939 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1940
1941 kfree(state);
1942 }
1943
1944 static struct dvb_frontend_ops mb86a20s_ops;
1945
1946 struct dvb_frontend *mb86a20s_attach(const struct mb86a20s_config *config,
1947 struct i2c_adapter *i2c)
1948 {
1949 struct mb86a20s_state *state;
1950 u8 rev;
1951
1952 dev_dbg(&i2c->dev, "%s called.\n", __func__);
1953
1954 /* allocate memory for the internal state */
1955 state = kzalloc(sizeof(struct mb86a20s_state), GFP_KERNEL);
1956 if (state == NULL) {
1957 dev_err(&i2c->dev,
1958 "%s: unable to allocate memory for state\n", __func__);
1959 goto error;
1960 }
1961
1962 /* setup the state */
1963 state->config = config;
1964 state->i2c = i2c;
1965
1966 /* create dvb_frontend */
1967 memcpy(&state->frontend.ops, &mb86a20s_ops,
1968 sizeof(struct dvb_frontend_ops));
1969 state->frontend.demodulator_priv = state;
1970
1971 /* Check if it is a mb86a20s frontend */
1972 rev = mb86a20s_readreg(state, 0);
1973
1974 if (rev == 0x13) {
1975 dev_info(&i2c->dev,
1976 "Detected a Fujitsu mb86a20s frontend\n");
1977 } else {
1978 dev_dbg(&i2c->dev,
1979 "Frontend revision %d is unknown - aborting.\n",
1980 rev);
1981 goto error;
1982 }
1983
1984 return &state->frontend;
1985
1986 error:
1987 kfree(state);
1988 return NULL;
1989 }
1990 EXPORT_SYMBOL(mb86a20s_attach);
1991
1992 static struct dvb_frontend_ops mb86a20s_ops = {
1993 .delsys = { SYS_ISDBT },
1994 /* Use dib8000 values per default */
1995 .info = {
1996 .name = "Fujitsu mb86A20s",
1997 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_RECOVER |
1998 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1999 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
2000 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
2001 FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_QAM_AUTO |
2002 FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
2003 /* Actually, those values depend on the used tuner */
2004 .frequency_min = 45000000,
2005 .frequency_max = 864000000,
2006 .frequency_stepsize = 62500,
2007 },
2008
2009 .release = mb86a20s_release,
2010
2011 .init = mb86a20s_initfe,
2012 .set_frontend = mb86a20s_set_frontend,
2013 .get_frontend = mb86a20s_get_frontend_dummy,
2014 .read_status = mb86a20s_read_status_and_stats,
2015 .read_signal_strength = mb86a20s_read_signal_strength_from_cache,
2016 .tune = mb86a20s_tune,
2017 };
2018
2019 MODULE_DESCRIPTION("DVB Frontend module for Fujitsu mb86A20s hardware");
2020 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
2021 MODULE_LICENSE("GPL");
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