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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / drivers / media / dvb-frontends / mb86a20s.c
blobcfc005ee11d8704e754008cdda3a775ac91613c2
1 /*
2 * Fujitu mb86a20s ISDB-T/ISDB-Tsb Module driver
3 *
4 * Copyright (C) 2010-2013 Mauro Carvalho Chehab
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 #define NUM_LAYERS 3
24
25 enum mb86a20s_bandwidth {
26 MB86A20S_13SEG = 0,
27 MB86A20S_13SEG_PARTIAL = 1,
28 MB86A20S_1SEG = 2,
29 MB86A20S_3SEG = 3,
30 };
31
32 static u8 mb86a20s_subchannel[] = {
33 0xb0, 0xc0, 0xd0, 0xe0,
34 0xf0, 0x00, 0x10, 0x20,
35 };
36
37 struct mb86a20s_state {
38 struct i2c_adapter *i2c;
39 const struct mb86a20s_config *config;
40 u32 last_frequency;
41
42 struct dvb_frontend frontend;
43
44 u32 if_freq;
45 enum mb86a20s_bandwidth bw;
46 bool inversion;
47 u32 subchannel;
48
49 u32 estimated_rate[NUM_LAYERS];
50 unsigned long get_strength_time;
51
52 bool need_init;
53 };
54
55 struct regdata {
56 u8 reg;
57 u8 data;
58 };
59
60 #define BER_SAMPLING_RATE 1 /* Seconds */
61
62 /*
63 * Initialization sequence: Use whatevere default values that PV SBTVD
64 * does on its initialisation, obtained via USB snoop
65 */
66 static struct regdata mb86a20s_init1[] = {
67 { 0x70, 0x0f },
68 { 0x70, 0xff },
69 { 0x08, 0x01 },
70 { 0x50, 0xd1 }, { 0x51, 0x20 },
71 };
72
73 static struct regdata mb86a20s_init2[] = {
74 { 0x28, 0x22 }, { 0x29, 0x00 }, { 0x2a, 0x1f }, { 0x2b, 0xf0 },
75 { 0x3b, 0x21 },
76 { 0x3c, 0x38 },
77 { 0x01, 0x0d },
78 { 0x04, 0x08 }, { 0x05, 0x03 },
79 { 0x04, 0x0e }, { 0x05, 0x00 },
80 { 0x04, 0x0f }, { 0x05, 0x37 },
81 { 0x04, 0x0b }, { 0x05, 0x78 },
82 { 0x04, 0x00 }, { 0x05, 0x00 },
83 { 0x04, 0x01 }, { 0x05, 0x1e },
84 { 0x04, 0x02 }, { 0x05, 0x07 },
85 { 0x04, 0x03 }, { 0x05, 0xd0 },
86 { 0x04, 0x09 }, { 0x05, 0x00 },
87 { 0x04, 0x0a }, { 0x05, 0xff },
88 { 0x04, 0x27 }, { 0x05, 0x00 },
89 { 0x04, 0x28 }, { 0x05, 0x00 },
90 { 0x04, 0x1e }, { 0x05, 0x00 },
91 { 0x04, 0x29 }, { 0x05, 0x64 },
92 { 0x04, 0x32 }, { 0x05, 0x02 },
93 { 0x04, 0x14 }, { 0x05, 0x02 },
94 { 0x04, 0x04 }, { 0x05, 0x00 },
95 { 0x04, 0x05 }, { 0x05, 0x22 },
96 { 0x04, 0x06 }, { 0x05, 0x0e },
97 { 0x04, 0x07 }, { 0x05, 0xd8 },
98 { 0x04, 0x12 }, { 0x05, 0x00 },
99 { 0x04, 0x13 }, { 0x05, 0xff },
100 { 0x04, 0x15 }, { 0x05, 0x4e },
101 { 0x04, 0x16 }, { 0x05, 0x20 },
102
103 /*
104 * On this demod, when the bit count reaches the count below,
105 * it collects the bit error count. The bit counters are initialized
106 * to 65535 here. This warrants that all of them will be quickly
107 * calculated when device gets locked. As TMCC is parsed, the values
108 * will be adjusted later in the driver's code.
109 */
110 { 0x52, 0x01 }, /* Turn on BER before Viterbi */
111 { 0x50, 0xa7 }, { 0x51, 0x00 },
112 { 0x50, 0xa8 }, { 0x51, 0xff },
113 { 0x50, 0xa9 }, { 0x51, 0xff },
114 { 0x50, 0xaa }, { 0x51, 0x00 },
115 { 0x50, 0xab }, { 0x51, 0xff },
116 { 0x50, 0xac }, { 0x51, 0xff },
117 { 0x50, 0xad }, { 0x51, 0x00 },
118 { 0x50, 0xae }, { 0x51, 0xff },
119 { 0x50, 0xaf }, { 0x51, 0xff },
120
121 /*
122 * On this demod, post BER counts blocks. When the count reaches the
123 * value below, it collects the block error count. The block counters
124 * are initialized to 127 here. This warrants that all of them will be
125 * quickly calculated when device gets locked. As TMCC is parsed, the
126 * values will be adjusted later in the driver's code.
127 */
128 { 0x5e, 0x07 }, /* Turn on BER after Viterbi */
129 { 0x50, 0xdc }, { 0x51, 0x00 },
130 { 0x50, 0xdd }, { 0x51, 0x7f },
131 { 0x50, 0xde }, { 0x51, 0x00 },
132 { 0x50, 0xdf }, { 0x51, 0x7f },
133 { 0x50, 0xe0 }, { 0x51, 0x00 },
134 { 0x50, 0xe1 }, { 0x51, 0x7f },
135
136 /*
137 * On this demod, when the block count reaches the count below,
138 * it collects the block error count. The block counters are initialized
139 * to 127 here. This warrants that all of them will be quickly
140 * calculated when device gets locked. As TMCC is parsed, the values
141 * will be adjusted later in the driver's code.
142 */
143 { 0x50, 0xb0 }, { 0x51, 0x07 }, /* Enable PER */
144 { 0x50, 0xb2 }, { 0x51, 0x00 },
145 { 0x50, 0xb3 }, { 0x51, 0x7f },
146 { 0x50, 0xb4 }, { 0x51, 0x00 },
147 { 0x50, 0xb5 }, { 0x51, 0x7f },
148 { 0x50, 0xb6 }, { 0x51, 0x00 },
149 { 0x50, 0xb7 }, { 0x51, 0x7f },
150
151 { 0x50, 0x50 }, { 0x51, 0x02 }, /* MER manual mode */
152 { 0x50, 0x51 }, { 0x51, 0x04 }, /* MER symbol 4 */
153 { 0x45, 0x04 }, /* CN symbol 4 */
154 { 0x48, 0x04 }, /* CN manual mode */
155
156 { 0x50, 0xd6 }, { 0x51, 0x1f },
157 { 0x50, 0xd2 }, { 0x51, 0x03 },
158 { 0x50, 0xd7 }, { 0x51, 0xbf },
159 { 0x28, 0x74 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0xff },
160 { 0x28, 0x46 }, { 0x29, 0x00 }, { 0x2a, 0x1a }, { 0x2b, 0x0c },
161
162 { 0x04, 0x40 }, { 0x05, 0x00 },
163 { 0x28, 0x00 }, { 0x2b, 0x08 },
164 { 0x28, 0x05 }, { 0x2b, 0x00 },
165 { 0x1c, 0x01 },
166 { 0x28, 0x06 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x1f },
167 { 0x28, 0x07 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x18 },
168 { 0x28, 0x08 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x12 },
169 { 0x28, 0x09 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x30 },
170 { 0x28, 0x0a }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x37 },
171 { 0x28, 0x0b }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x02 },
172 { 0x28, 0x0c }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x09 },
173 { 0x28, 0x0d }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x06 },
174 { 0x28, 0x0e }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x7b },
175 { 0x28, 0x0f }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x76 },
176 { 0x28, 0x10 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x7d },
177 { 0x28, 0x11 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x08 },
178 { 0x28, 0x12 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x0b },
179 { 0x28, 0x13 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x00 },
180 { 0x28, 0x14 }, { 0x29, 0x00 }, { 0x2a, 0x01 }, { 0x2b, 0xf2 },
181 { 0x28, 0x15 }, { 0x29, 0x00 }, { 0x2a, 0x01 }, { 0x2b, 0xf3 },
182 { 0x28, 0x16 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x05 },
183 { 0x28, 0x17 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x16 },
184 { 0x28, 0x18 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x0f },
185 { 0x28, 0x19 }, { 0x29, 0x00 }, { 0x2a, 0x07 }, { 0x2b, 0xef },
186 { 0x28, 0x1a }, { 0x29, 0x00 }, { 0x2a, 0x07 }, { 0x2b, 0xd8 },
187 { 0x28, 0x1b }, { 0x29, 0x00 }, { 0x2a, 0x07 }, { 0x2b, 0xf1 },
188 { 0x28, 0x1c }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x3d },
189 { 0x28, 0x1d }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x94 },
190 { 0x28, 0x1e }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0xba },
191 { 0x50, 0x1e }, { 0x51, 0x5d },
192 { 0x50, 0x22 }, { 0x51, 0x00 },
193 { 0x50, 0x23 }, { 0x51, 0xc8 },
194 { 0x50, 0x24 }, { 0x51, 0x00 },
195 { 0x50, 0x25 }, { 0x51, 0xf0 },
196 { 0x50, 0x26 }, { 0x51, 0x00 },
197 { 0x50, 0x27 }, { 0x51, 0xc3 },
198 { 0x50, 0x39 }, { 0x51, 0x02 },
199 { 0xec, 0x0f },
200 { 0xeb, 0x1f },
201 { 0x28, 0x6a }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x00 },
202 { 0xd0, 0x00 },
203 };
204
205 static struct regdata mb86a20s_reset_reception[] = {
206 { 0x70, 0xf0 },
207 { 0x70, 0xff },
208 { 0x08, 0x01 },
209 { 0x08, 0x00 },
210 };
211
212 static struct regdata mb86a20s_per_ber_reset[] = {
213 { 0x53, 0x00 }, /* pre BER Counter reset */
214 { 0x53, 0x07 },
215
216 { 0x5f, 0x00 }, /* post BER Counter reset */
217 { 0x5f, 0x07 },
218
219 { 0x50, 0xb1 }, /* PER Counter reset */
220 { 0x51, 0x07 },
221 { 0x51, 0x00 },
222 };
223
224 /*
225 * I2C read/write functions and macros
226 */
227
228 static int mb86a20s_i2c_writereg(struct mb86a20s_state *state,
229 u8 i2c_addr, u8 reg, u8 data)
230 {
231 u8 buf[] = { reg, data };
232 struct i2c_msg msg = {
233 .addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
234 };
235 int rc;
236
237 rc = i2c_transfer(state->i2c, &msg, 1);
238 if (rc != 1) {
239 dev_err(&state->i2c->dev,
240 "%s: writereg error (rc == %i, reg == 0x%02x, data == 0x%02x)\n",
241 __func__, rc, reg, data);
242 return rc;
243 }
244
245 return 0;
246 }
247
248 static int mb86a20s_i2c_writeregdata(struct mb86a20s_state *state,
249 u8 i2c_addr, struct regdata *rd, int size)
250 {
251 int i, rc;
252
253 for (i = 0; i < size; i++) {
254 rc = mb86a20s_i2c_writereg(state, i2c_addr, rd[i].reg,
255 rd[i].data);
256 if (rc < 0)
257 return rc;
258 }
259 return 0;
260 }
261
262 static int mb86a20s_i2c_readreg(struct mb86a20s_state *state,
263 u8 i2c_addr, u8 reg)
264 {
265 u8 val;
266 int rc;
267 struct i2c_msg msg[] = {
268 { .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
269 { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
270 };
271
272 rc = i2c_transfer(state->i2c, msg, 2);
273
274 if (rc != 2) {
275 dev_err(&state->i2c->dev, "%s: reg=0x%x (error=%d)\n",
276 __func__, reg, rc);
277 return (rc < 0) ? rc : -EIO;
278 }
279
280 return val;
281 }
282
283 #define mb86a20s_readreg(state, reg) \
284 mb86a20s_i2c_readreg(state, state->config->demod_address, reg)
285 #define mb86a20s_writereg(state, reg, val) \
286 mb86a20s_i2c_writereg(state, state->config->demod_address, reg, val)
287 #define mb86a20s_writeregdata(state, regdata) \
288 mb86a20s_i2c_writeregdata(state, state->config->demod_address, \
289 regdata, ARRAY_SIZE(regdata))
290
291 /*
292 * Ancillary internal routines (likely compiled inlined)
293 *
294 * The functions below assume that gateway lock has already obtained
295 */
296
297 static int mb86a20s_read_status(struct dvb_frontend *fe, enum fe_status *status)
298 {
299 struct mb86a20s_state *state = fe->demodulator_priv;
300 int val;
301
302 *status = 0;
303
304 val = mb86a20s_readreg(state, 0x0a) & 0xf;
305 if (val < 0)
306 return val;
307
308 if (val >= 2)
309 *status |= FE_HAS_SIGNAL;
310
311 if (val >= 4)
312 *status |= FE_HAS_CARRIER;
313
314 if (val >= 5)
315 *status |= FE_HAS_VITERBI;
316
317 if (val >= 7)
318 *status |= FE_HAS_SYNC;
319
320 if (val >= 8) /* Maybe 9? */
321 *status |= FE_HAS_LOCK;
322
323 dev_dbg(&state->i2c->dev, "%s: Status = 0x%02x (state = %d)\n",
324 __func__, *status, val);
325
326 return val;
327 }
328
329 static int mb86a20s_read_signal_strength(struct dvb_frontend *fe)
330 {
331 struct mb86a20s_state *state = fe->demodulator_priv;
332 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
333 int rc;
334 unsigned rf_max, rf_min, rf;
335
336 if (state->get_strength_time &&
337 (!time_after(jiffies, state->get_strength_time)))
338 return c->strength.stat[0].uvalue;
339
340 /* Reset its value if an error happen */
341 c->strength.stat[0].uvalue = 0;
342
343 /* Does a binary search to get RF strength */
344 rf_max = 0xfff;
345 rf_min = 0;
346 do {
347 rf = (rf_max + rf_min) / 2;
348 rc = mb86a20s_writereg(state, 0x04, 0x1f);
349 if (rc < 0)
350 return rc;
351 rc = mb86a20s_writereg(state, 0x05, rf >> 8);
352 if (rc < 0)
353 return rc;
354 rc = mb86a20s_writereg(state, 0x04, 0x20);
355 if (rc < 0)
356 return rc;
357 rc = mb86a20s_writereg(state, 0x05, rf);
358 if (rc < 0)
359 return rc;
360
361 rc = mb86a20s_readreg(state, 0x02);
362 if (rc < 0)
363 return rc;
364 if (rc & 0x08)
365 rf_min = (rf_max + rf_min) / 2;
366 else
367 rf_max = (rf_max + rf_min) / 2;
368 if (rf_max - rf_min < 4) {
369 rf = (rf_max + rf_min) / 2;
370
371 /* Rescale it from 2^12 (4096) to 2^16 */
372 rf = rf << (16 - 12);
373 if (rf)
374 rf |= (1 << 12) - 1;
375
376 dev_dbg(&state->i2c->dev,
377 "%s: signal strength = %d (%d < RF=%d < %d)\n",
378 __func__, rf, rf_min, rf >> 4, rf_max);
379 c->strength.stat[0].uvalue = rf;
380 state->get_strength_time = jiffies +
381 msecs_to_jiffies(1000);
382 return 0;
383 }
384 } while (1);
385 }
386
387 static int mb86a20s_get_modulation(struct mb86a20s_state *state,
388 unsigned layer)
389 {
390 int rc;
391 static unsigned char reg[] = {
392 [0] = 0x86, /* Layer A */
393 [1] = 0x8a, /* Layer B */
394 [2] = 0x8e, /* Layer C */
395 };
396
397 if (layer >= ARRAY_SIZE(reg))
398 return -EINVAL;
399 rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
400 if (rc < 0)
401 return rc;
402 rc = mb86a20s_readreg(state, 0x6e);
403 if (rc < 0)
404 return rc;
405 switch ((rc >> 4) & 0x07) {
406 case 0:
407 return DQPSK;
408 case 1:
409 return QPSK;
410 case 2:
411 return QAM_16;
412 case 3:
413 return QAM_64;
414 default:
415 return QAM_AUTO;
416 }
417 }
418
419 static int mb86a20s_get_fec(struct mb86a20s_state *state,
420 unsigned layer)
421 {
422 int rc;
423
424 static unsigned char reg[] = {
425 [0] = 0x87, /* Layer A */
426 [1] = 0x8b, /* Layer B */
427 [2] = 0x8f, /* Layer C */
428 };
429
430 if (layer >= ARRAY_SIZE(reg))
431 return -EINVAL;
432 rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
433 if (rc < 0)
434 return rc;
435 rc = mb86a20s_readreg(state, 0x6e);
436 if (rc < 0)
437 return rc;
438 switch ((rc >> 4) & 0x07) {
439 case 0:
440 return FEC_1_2;
441 case 1:
442 return FEC_2_3;
443 case 2:
444 return FEC_3_4;
445 case 3:
446 return FEC_5_6;
447 case 4:
448 return FEC_7_8;
449 default:
450 return FEC_AUTO;
451 }
452 }
453
454 static int mb86a20s_get_interleaving(struct mb86a20s_state *state,
455 unsigned layer)
456 {
457 int rc;
458 int interleaving[] = {
459 0, 1, 2, 4, 8
460 };
461
462 static unsigned char reg[] = {
463 [0] = 0x88, /* Layer A */
464 [1] = 0x8c, /* Layer B */
465 [2] = 0x90, /* Layer C */
466 };
467
468 if (layer >= ARRAY_SIZE(reg))
469 return -EINVAL;
470 rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
471 if (rc < 0)
472 return rc;
473 rc = mb86a20s_readreg(state, 0x6e);
474 if (rc < 0)
475 return rc;
476
477 return interleaving[(rc >> 4) & 0x07];
478 }
479
480 static int mb86a20s_get_segment_count(struct mb86a20s_state *state,
481 unsigned layer)
482 {
483 int rc, count;
484 static unsigned char reg[] = {
485 [0] = 0x89, /* Layer A */
486 [1] = 0x8d, /* Layer B */
487 [2] = 0x91, /* Layer C */
488 };
489
490 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
491
492 if (layer >= ARRAY_SIZE(reg))
493 return -EINVAL;
494
495 rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
496 if (rc < 0)
497 return rc;
498 rc = mb86a20s_readreg(state, 0x6e);
499 if (rc < 0)
500 return rc;
501 count = (rc >> 4) & 0x0f;
502
503 dev_dbg(&state->i2c->dev, "%s: segments: %d.\n", __func__, count);
504
505 return count;
506 }
507
508 static void mb86a20s_reset_frontend_cache(struct dvb_frontend *fe)
509 {
510 struct mb86a20s_state *state = fe->demodulator_priv;
511 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
512
513 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
514
515 /* Fixed parameters */
516 c->delivery_system = SYS_ISDBT;
517 c->bandwidth_hz = 6000000;
518
519 /* Initialize values that will be later autodetected */
520 c->isdbt_layer_enabled = 0;
521 c->transmission_mode = TRANSMISSION_MODE_AUTO;
522 c->guard_interval = GUARD_INTERVAL_AUTO;
523 c->isdbt_sb_mode = 0;
524 c->isdbt_sb_segment_count = 0;
525 }
526
527 /*
528 * Estimates the bit rate using the per-segment bit rate given by
529 * ABNT/NBR 15601 spec (table 4).
530 */
531 static u32 isdbt_rate[3][5][4] = {
532 { /* DQPSK/QPSK */
533 { 280850, 312060, 330420, 340430 }, /* 1/2 */
534 { 374470, 416080, 440560, 453910 }, /* 2/3 */
535 { 421280, 468090, 495630, 510650 }, /* 3/4 */
536 { 468090, 520100, 550700, 567390 }, /* 5/6 */
537 { 491500, 546110, 578230, 595760 }, /* 7/8 */
538 }, { /* QAM16 */
539 { 561710, 624130, 660840, 680870 }, /* 1/2 */
540 { 748950, 832170, 881120, 907820 }, /* 2/3 */
541 { 842570, 936190, 991260, 1021300 }, /* 3/4 */
542 { 936190, 1040210, 1101400, 1134780 }, /* 5/6 */
543 { 983000, 1092220, 1156470, 1191520 }, /* 7/8 */
544 }, { /* QAM64 */
545 { 842570, 936190, 991260, 1021300 }, /* 1/2 */
546 { 1123430, 1248260, 1321680, 1361740 }, /* 2/3 */
547 { 1263860, 1404290, 1486900, 1531950 }, /* 3/4 */
548 { 1404290, 1560320, 1652110, 1702170 }, /* 5/6 */
549 { 1474500, 1638340, 1734710, 1787280 }, /* 7/8 */
550 }
551 };
552
553 static void mb86a20s_layer_bitrate(struct dvb_frontend *fe, u32 layer,
554 u32 modulation, u32 forward_error_correction,
555 u32 guard_interval,
556 u32 segment)
557 {
558 struct mb86a20s_state *state = fe->demodulator_priv;
559 u32 rate;
560 int mod, fec, guard;
561
562 /*
563 * If modulation/fec/guard is not detected, the default is
564 * to consider the lowest bit rate, to avoid taking too long time
565 * to get BER.
566 */
567 switch (modulation) {
568 case DQPSK:
569 case QPSK:
570 default:
571 mod = 0;
572 break;
573 case QAM_16:
574 mod = 1;
575 break;
576 case QAM_64:
577 mod = 2;
578 break;
579 }
580
581 switch (forward_error_correction) {
582 default:
583 case FEC_1_2:
584 case FEC_AUTO:
585 fec = 0;
586 break;
587 case FEC_2_3:
588 fec = 1;
589 break;
590 case FEC_3_4:
591 fec = 2;
592 break;
593 case FEC_5_6:
594 fec = 3;
595 break;
596 case FEC_7_8:
597 fec = 4;
598 break;
599 }
600
601 switch (guard_interval) {
602 default:
603 case GUARD_INTERVAL_1_4:
604 guard = 0;
605 break;
606 case GUARD_INTERVAL_1_8:
607 guard = 1;
608 break;
609 case GUARD_INTERVAL_1_16:
610 guard = 2;
611 break;
612 case GUARD_INTERVAL_1_32:
613 guard = 3;
614 break;
615 }
616
617 /* Samples BER at BER_SAMPLING_RATE seconds */
618 rate = isdbt_rate[mod][fec][guard] * segment * BER_SAMPLING_RATE;
619
620 /* Avoids sampling too quickly or to overflow the register */
621 if (rate < 256)
622 rate = 256;
623 else if (rate > (1 << 24) - 1)
624 rate = (1 << 24) - 1;
625
626 dev_dbg(&state->i2c->dev,
627 "%s: layer %c bitrate: %d kbps; counter = %d (0x%06x)\n",
628 __func__, 'A' + layer,
629 segment * isdbt_rate[mod][fec][guard]/1000,
630 rate, rate);
631
632 state->estimated_rate[layer] = rate;
633 }
634
635 static int mb86a20s_get_frontend(struct dvb_frontend *fe)
636 {
637 struct mb86a20s_state *state = fe->demodulator_priv;
638 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
639 int layer, rc;
640
641 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
642
643 /* Reset frontend cache to default values */
644 mb86a20s_reset_frontend_cache(fe);
645
646 /* Check for partial reception */
647 rc = mb86a20s_writereg(state, 0x6d, 0x85);
648 if (rc < 0)
649 return rc;
650 rc = mb86a20s_readreg(state, 0x6e);
651 if (rc < 0)
652 return rc;
653 c->isdbt_partial_reception = (rc & 0x10) ? 1 : 0;
654
655 /* Get per-layer data */
656
657 for (layer = 0; layer < NUM_LAYERS; layer++) {
658 dev_dbg(&state->i2c->dev, "%s: getting data for layer %c.\n",
659 __func__, 'A' + layer);
660
661 rc = mb86a20s_get_segment_count(state, layer);
662 if (rc < 0)
663 goto noperlayer_error;
664 if (rc >= 0 && rc < 14) {
665 c->layer[layer].segment_count = rc;
666 } else {
667 c->layer[layer].segment_count = 0;
668 state->estimated_rate[layer] = 0;
669 continue;
670 }
671 c->isdbt_layer_enabled |= 1 << layer;
672 rc = mb86a20s_get_modulation(state, layer);
673 if (rc < 0)
674 goto noperlayer_error;
675 dev_dbg(&state->i2c->dev, "%s: modulation %d.\n",
676 __func__, rc);
677 c->layer[layer].modulation = rc;
678 rc = mb86a20s_get_fec(state, layer);
679 if (rc < 0)
680 goto noperlayer_error;
681 dev_dbg(&state->i2c->dev, "%s: FEC %d.\n",
682 __func__, rc);
683 c->layer[layer].fec = rc;
684 rc = mb86a20s_get_interleaving(state, layer);
685 if (rc < 0)
686 goto noperlayer_error;
687 dev_dbg(&state->i2c->dev, "%s: interleaving %d.\n",
688 __func__, rc);
689 c->layer[layer].interleaving = rc;
690 mb86a20s_layer_bitrate(fe, layer, c->layer[layer].modulation,
691 c->layer[layer].fec,
692 c->guard_interval,
693 c->layer[layer].segment_count);
694 }
695
696 rc = mb86a20s_writereg(state, 0x6d, 0x84);
697 if (rc < 0)
698 return rc;
699 if ((rc & 0x60) == 0x20) {
700 c->isdbt_sb_mode = 1;
701 /* At least, one segment should exist */
702 if (!c->isdbt_sb_segment_count)
703 c->isdbt_sb_segment_count = 1;
704 }
705
706 /* Get transmission mode and guard interval */
707 rc = mb86a20s_readreg(state, 0x07);
708 if (rc < 0)
709 return rc;
710 c->transmission_mode = TRANSMISSION_MODE_AUTO;
711 if ((rc & 0x60) == 0x20) {
712 /* Only modes 2 and 3 are supported */
713 switch ((rc >> 2) & 0x03) {
714 case 1:
715 c->transmission_mode = TRANSMISSION_MODE_4K;
716 break;
717 case 2:
718 c->transmission_mode = TRANSMISSION_MODE_8K;
719 break;
720 }
721 }
722 c->guard_interval = GUARD_INTERVAL_AUTO;
723 if (!(rc & 0x10)) {
724 /* Guard interval 1/32 is not supported */
725 switch (rc & 0x3) {
726 case 0:
727 c->guard_interval = GUARD_INTERVAL_1_4;
728 break;
729 case 1:
730 c->guard_interval = GUARD_INTERVAL_1_8;
731 break;
732 case 2:
733 c->guard_interval = GUARD_INTERVAL_1_16;
734 break;
735 }
736 }
737 return 0;
738
739 noperlayer_error:
740
741 /* per-layer info is incomplete; discard all per-layer */
742 c->isdbt_layer_enabled = 0;
743
744 return rc;
745 }
746
747 static int mb86a20s_reset_counters(struct dvb_frontend *fe)
748 {
749 struct mb86a20s_state *state = fe->demodulator_priv;
750 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
751 int rc, val;
752
753 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
754
755 /* Reset the counters, if the channel changed */
756 if (state->last_frequency != c->frequency) {
757 memset(&c->cnr, 0, sizeof(c->cnr));
758 memset(&c->pre_bit_error, 0, sizeof(c->pre_bit_error));
759 memset(&c->pre_bit_count, 0, sizeof(c->pre_bit_count));
760 memset(&c->post_bit_error, 0, sizeof(c->post_bit_error));
761 memset(&c->post_bit_count, 0, sizeof(c->post_bit_count));
762 memset(&c->block_error, 0, sizeof(c->block_error));
763 memset(&c->block_count, 0, sizeof(c->block_count));
764
765 state->last_frequency = c->frequency;
766 }
767
768 /* Clear status for most stats */
769
770 /* BER/PER counter reset */
771 rc = mb86a20s_writeregdata(state, mb86a20s_per_ber_reset);
772 if (rc < 0)
773 goto err;
774
775 /* CNR counter reset */
776 rc = mb86a20s_readreg(state, 0x45);
777 if (rc < 0)
778 goto err;
779 val = rc;
780 rc = mb86a20s_writereg(state, 0x45, val | 0x10);
781 if (rc < 0)
782 goto err;
783 rc = mb86a20s_writereg(state, 0x45, val & 0x6f);
784 if (rc < 0)
785 goto err;
786
787 /* MER counter reset */
788 rc = mb86a20s_writereg(state, 0x50, 0x50);
789 if (rc < 0)
790 goto err;
791 rc = mb86a20s_readreg(state, 0x51);
792 if (rc < 0)
793 goto err;
794 val = rc;
795 rc = mb86a20s_writereg(state, 0x51, val | 0x01);
796 if (rc < 0)
797 goto err;
798 rc = mb86a20s_writereg(state, 0x51, val & 0x06);
799 if (rc < 0)
800 goto err;
801
802 goto ok;
803 err:
804 dev_err(&state->i2c->dev,
805 "%s: Can't reset FE statistics (error %d).\n",
806 __func__, rc);
807 ok:
808 return rc;
809 }
810
811 static int mb86a20s_get_pre_ber(struct dvb_frontend *fe,
812 unsigned layer,
813 u32 *error, u32 *count)
814 {
815 struct mb86a20s_state *state = fe->demodulator_priv;
816 int rc, val;
817
818 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
819
820 if (layer >= NUM_LAYERS)
821 return -EINVAL;
822
823 /* Check if the BER measures are already available */
824 rc = mb86a20s_readreg(state, 0x54);
825 if (rc < 0)
826 return rc;
827
828 /* Check if data is available for that layer */
829 if (!(rc & (1 << layer))) {
830 dev_dbg(&state->i2c->dev,
831 "%s: preBER for layer %c is not available yet.\n",
832 __func__, 'A' + layer);
833 return -EBUSY;
834 }
835
836 /* Read Bit Error Count */
837 rc = mb86a20s_readreg(state, 0x55 + layer * 3);
838 if (rc < 0)
839 return rc;
840 *error = rc << 16;
841 rc = mb86a20s_readreg(state, 0x56 + layer * 3);
842 if (rc < 0)
843 return rc;
844 *error |= rc << 8;
845 rc = mb86a20s_readreg(state, 0x57 + layer * 3);
846 if (rc < 0)
847 return rc;
848 *error |= rc;
849
850 dev_dbg(&state->i2c->dev,
851 "%s: bit error before Viterbi for layer %c: %d.\n",
852 __func__, 'A' + layer, *error);
853
854 /* Read Bit Count */
855 rc = mb86a20s_writereg(state, 0x50, 0xa7 + layer * 3);
856 if (rc < 0)
857 return rc;
858 rc = mb86a20s_readreg(state, 0x51);
859 if (rc < 0)
860 return rc;
861 *count = rc << 16;
862 rc = mb86a20s_writereg(state, 0x50, 0xa8 + layer * 3);
863 if (rc < 0)
864 return rc;
865 rc = mb86a20s_readreg(state, 0x51);
866 if (rc < 0)
867 return rc;
868 *count |= rc << 8;
869 rc = mb86a20s_writereg(state, 0x50, 0xa9 + layer * 3);
870 if (rc < 0)
871 return rc;
872 rc = mb86a20s_readreg(state, 0x51);
873 if (rc < 0)
874 return rc;
875 *count |= rc;
876
877 dev_dbg(&state->i2c->dev,
878 "%s: bit count before Viterbi for layer %c: %d.\n",
879 __func__, 'A' + layer, *count);
880
881
882 /*
883 * As we get TMCC data from the frontend, we can better estimate the
884 * BER bit counters, in order to do the BER measure during a longer
885 * time. Use those data, if available, to update the bit count
886 * measure.
887 */
888
889 if (state->estimated_rate[layer]
890 && state->estimated_rate[layer] != *count) {
891 dev_dbg(&state->i2c->dev,
892 "%s: updating layer %c preBER counter to %d.\n",
893 __func__, 'A' + layer, state->estimated_rate[layer]);
894
895 /* Turn off BER before Viterbi */
896 rc = mb86a20s_writereg(state, 0x52, 0x00);
897
898 /* Update counter for this layer */
899 rc = mb86a20s_writereg(state, 0x50, 0xa7 + layer * 3);
900 if (rc < 0)
901 return rc;
902 rc = mb86a20s_writereg(state, 0x51,
903 state->estimated_rate[layer] >> 16);
904 if (rc < 0)
905 return rc;
906 rc = mb86a20s_writereg(state, 0x50, 0xa8 + layer * 3);
907 if (rc < 0)
908 return rc;
909 rc = mb86a20s_writereg(state, 0x51,
910 state->estimated_rate[layer] >> 8);
911 if (rc < 0)
912 return rc;
913 rc = mb86a20s_writereg(state, 0x50, 0xa9 + layer * 3);
914 if (rc < 0)
915 return rc;
916 rc = mb86a20s_writereg(state, 0x51,
917 state->estimated_rate[layer]);
918 if (rc < 0)
919 return rc;
920
921 /* Turn on BER before Viterbi */
922 rc = mb86a20s_writereg(state, 0x52, 0x01);
923
924 /* Reset all preBER counters */
925 rc = mb86a20s_writereg(state, 0x53, 0x00);
926 if (rc < 0)
927 return rc;
928 rc = mb86a20s_writereg(state, 0x53, 0x07);
929 } else {
930 /* Reset counter to collect new data */
931 rc = mb86a20s_readreg(state, 0x53);
932 if (rc < 0)
933 return rc;
934 val = rc;
935 rc = mb86a20s_writereg(state, 0x53, val & ~(1 << layer));
936 if (rc < 0)
937 return rc;
938 rc = mb86a20s_writereg(state, 0x53, val | (1 << layer));
939 }
940
941 return rc;
942 }
943
944 static int mb86a20s_get_post_ber(struct dvb_frontend *fe,
945 unsigned layer,
946 u32 *error, u32 *count)
947 {
948 struct mb86a20s_state *state = fe->demodulator_priv;
949 u32 counter, collect_rate;
950 int rc, val;
951
952 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
953
954 if (layer >= NUM_LAYERS)
955 return -EINVAL;
956
957 /* Check if the BER measures are already available */
958 rc = mb86a20s_readreg(state, 0x60);
959 if (rc < 0)
960 return rc;
961
962 /* Check if data is available for that layer */
963 if (!(rc & (1 << layer))) {
964 dev_dbg(&state->i2c->dev,
965 "%s: post BER for layer %c is not available yet.\n",
966 __func__, 'A' + layer);
967 return -EBUSY;
968 }
969
970 /* Read Bit Error Count */
971 rc = mb86a20s_readreg(state, 0x64 + layer * 3);
972 if (rc < 0)
973 return rc;
974 *error = rc << 16;
975 rc = mb86a20s_readreg(state, 0x65 + layer * 3);
976 if (rc < 0)
977 return rc;
978 *error |= rc << 8;
979 rc = mb86a20s_readreg(state, 0x66 + layer * 3);
980 if (rc < 0)
981 return rc;
982 *error |= rc;
983
984 dev_dbg(&state->i2c->dev,
985 "%s: post bit error for layer %c: %d.\n",
986 __func__, 'A' + layer, *error);
987
988 /* Read Bit Count */
989 rc = mb86a20s_writereg(state, 0x50, 0xdc + layer * 2);
990 if (rc < 0)
991 return rc;
992 rc = mb86a20s_readreg(state, 0x51);
993 if (rc < 0)
994 return rc;
995 counter = rc << 8;
996 rc = mb86a20s_writereg(state, 0x50, 0xdd + layer * 2);
997 if (rc < 0)
998 return rc;
999 rc = mb86a20s_readreg(state, 0x51);
1000 if (rc < 0)
1001 return rc;
1002 counter |= rc;
1003 *count = counter * 204 * 8;
1004
1005 dev_dbg(&state->i2c->dev,
1006 "%s: post bit count for layer %c: %d.\n",
1007 __func__, 'A' + layer, *count);
1008
1009 /*
1010 * As we get TMCC data from the frontend, we can better estimate the
1011 * BER bit counters, in order to do the BER measure during a longer
1012 * time. Use those data, if available, to update the bit count
1013 * measure.
1014 */
1015
1016 if (!state->estimated_rate[layer])
1017 goto reset_measurement;
1018
1019 collect_rate = state->estimated_rate[layer] / 204 / 8;
1020 if (collect_rate < 32)
1021 collect_rate = 32;
1022 if (collect_rate > 65535)
1023 collect_rate = 65535;
1024 if (collect_rate != counter) {
1025 dev_dbg(&state->i2c->dev,
1026 "%s: updating postBER counter on layer %c to %d.\n",
1027 __func__, 'A' + layer, collect_rate);
1028
1029 /* Turn off BER after Viterbi */
1030 rc = mb86a20s_writereg(state, 0x5e, 0x00);
1031
1032 /* Update counter for this layer */
1033 rc = mb86a20s_writereg(state, 0x50, 0xdc + layer * 2);
1034 if (rc < 0)
1035 return rc;
1036 rc = mb86a20s_writereg(state, 0x51, collect_rate >> 8);
1037 if (rc < 0)
1038 return rc;
1039 rc = mb86a20s_writereg(state, 0x50, 0xdd + layer * 2);
1040 if (rc < 0)
1041 return rc;
1042 rc = mb86a20s_writereg(state, 0x51, collect_rate & 0xff);
1043 if (rc < 0)
1044 return rc;
1045
1046 /* Turn on BER after Viterbi */
1047 rc = mb86a20s_writereg(state, 0x5e, 0x07);
1048
1049 /* Reset all preBER counters */
1050 rc = mb86a20s_writereg(state, 0x5f, 0x00);
1051 if (rc < 0)
1052 return rc;
1053 rc = mb86a20s_writereg(state, 0x5f, 0x07);
1054
1055 return rc;
1056 }
1057
1058 reset_measurement:
1059 /* Reset counter to collect new data */
1060 rc = mb86a20s_readreg(state, 0x5f);
1061 if (rc < 0)
1062 return rc;
1063 val = rc;
1064 rc = mb86a20s_writereg(state, 0x5f, val & ~(1 << layer));
1065 if (rc < 0)
1066 return rc;
1067 rc = mb86a20s_writereg(state, 0x5f, val | (1 << layer));
1068
1069 return rc;
1070 }
1071
1072 static int mb86a20s_get_blk_error(struct dvb_frontend *fe,
1073 unsigned layer,
1074 u32 *error, u32 *count)
1075 {
1076 struct mb86a20s_state *state = fe->demodulator_priv;
1077 int rc, val;
1078 u32 collect_rate;
1079 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1080
1081 if (layer >= NUM_LAYERS)
1082 return -EINVAL;
1083
1084 /* Check if the PER measures are already available */
1085 rc = mb86a20s_writereg(state, 0x50, 0xb8);
1086 if (rc < 0)
1087 return rc;
1088 rc = mb86a20s_readreg(state, 0x51);
1089 if (rc < 0)
1090 return rc;
1091
1092 /* Check if data is available for that layer */
1093
1094 if (!(rc & (1 << layer))) {
1095 dev_dbg(&state->i2c->dev,
1096 "%s: block counts for layer %c aren't available yet.\n",
1097 __func__, 'A' + layer);
1098 return -EBUSY;
1099 }
1100
1101 /* Read Packet error Count */
1102 rc = mb86a20s_writereg(state, 0x50, 0xb9 + layer * 2);
1103 if (rc < 0)
1104 return rc;
1105 rc = mb86a20s_readreg(state, 0x51);
1106 if (rc < 0)
1107 return rc;
1108 *error = rc << 8;
1109 rc = mb86a20s_writereg(state, 0x50, 0xba + layer * 2);
1110 if (rc < 0)
1111 return rc;
1112 rc = mb86a20s_readreg(state, 0x51);
1113 if (rc < 0)
1114 return rc;
1115 *error |= rc;
1116 dev_dbg(&state->i2c->dev, "%s: block error for layer %c: %d.\n",
1117 __func__, 'A' + layer, *error);
1118
1119 /* Read Bit Count */
1120 rc = mb86a20s_writereg(state, 0x50, 0xb2 + layer * 2);
1121 if (rc < 0)
1122 return rc;
1123 rc = mb86a20s_readreg(state, 0x51);
1124 if (rc < 0)
1125 return rc;
1126 *count = rc << 8;
1127 rc = mb86a20s_writereg(state, 0x50, 0xb3 + layer * 2);
1128 if (rc < 0)
1129 return rc;
1130 rc = mb86a20s_readreg(state, 0x51);
1131 if (rc < 0)
1132 return rc;
1133 *count |= rc;
1134
1135 dev_dbg(&state->i2c->dev,
1136 "%s: block count for layer %c: %d.\n",
1137 __func__, 'A' + layer, *count);
1138
1139 /*
1140 * As we get TMCC data from the frontend, we can better estimate the
1141 * BER bit counters, in order to do the BER measure during a longer
1142 * time. Use those data, if available, to update the bit count
1143 * measure.
1144 */
1145
1146 if (!state->estimated_rate[layer])
1147 goto reset_measurement;
1148
1149 collect_rate = state->estimated_rate[layer] / 204 / 8;
1150 if (collect_rate < 32)
1151 collect_rate = 32;
1152 if (collect_rate > 65535)
1153 collect_rate = 65535;
1154
1155 if (collect_rate != *count) {
1156 dev_dbg(&state->i2c->dev,
1157 "%s: updating PER counter on layer %c to %d.\n",
1158 __func__, 'A' + layer, collect_rate);
1159
1160 /* Stop PER measurement */
1161 rc = mb86a20s_writereg(state, 0x50, 0xb0);
1162 if (rc < 0)
1163 return rc;
1164 rc = mb86a20s_writereg(state, 0x51, 0x00);
1165 if (rc < 0)
1166 return rc;
1167
1168 /* Update this layer's counter */
1169 rc = mb86a20s_writereg(state, 0x50, 0xb2 + layer * 2);
1170 if (rc < 0)
1171 return rc;
1172 rc = mb86a20s_writereg(state, 0x51, collect_rate >> 8);
1173 if (rc < 0)
1174 return rc;
1175 rc = mb86a20s_writereg(state, 0x50, 0xb3 + layer * 2);
1176 if (rc < 0)
1177 return rc;
1178 rc = mb86a20s_writereg(state, 0x51, collect_rate & 0xff);
1179 if (rc < 0)
1180 return rc;
1181
1182 /* start PER measurement */
1183 rc = mb86a20s_writereg(state, 0x50, 0xb0);
1184 if (rc < 0)
1185 return rc;
1186 rc = mb86a20s_writereg(state, 0x51, 0x07);
1187 if (rc < 0)
1188 return rc;
1189
1190 /* Reset all counters to collect new data */
1191 rc = mb86a20s_writereg(state, 0x50, 0xb1);
1192 if (rc < 0)
1193 return rc;
1194 rc = mb86a20s_writereg(state, 0x51, 0x07);
1195 if (rc < 0)
1196 return rc;
1197 rc = mb86a20s_writereg(state, 0x51, 0x00);
1198
1199 return rc;
1200 }
1201
1202 reset_measurement:
1203 /* Reset counter to collect new data */
1204 rc = mb86a20s_writereg(state, 0x50, 0xb1);
1205 if (rc < 0)
1206 return rc;
1207 rc = mb86a20s_readreg(state, 0x51);
1208 if (rc < 0)
1209 return rc;
1210 val = rc;
1211 rc = mb86a20s_writereg(state, 0x51, val | (1 << layer));
1212 if (rc < 0)
1213 return rc;
1214 rc = mb86a20s_writereg(state, 0x51, val & ~(1 << layer));
1215
1216 return rc;
1217 }
1218
1219 struct linear_segments {
1220 unsigned x, y;
1221 };
1222
1223 /*
1224 * All tables below return a dB/1000 measurement
1225 */
1226
1227 static const struct linear_segments cnr_to_db_table[] = {
1228 { 19648, 0},
1229 { 18187, 1000},
1230 { 16534, 2000},
1231 { 14823, 3000},
1232 { 13161, 4000},
1233 { 11622, 5000},
1234 { 10279, 6000},
1235 { 9089, 7000},
1236 { 8042, 8000},
1237 { 7137, 9000},
1238 { 6342, 10000},
1239 { 5641, 11000},
1240 { 5030, 12000},
1241 { 4474, 13000},
1242 { 3988, 14000},
1243 { 3556, 15000},
1244 { 3180, 16000},
1245 { 2841, 17000},
1246 { 2541, 18000},
1247 { 2276, 19000},
1248 { 2038, 20000},
1249 { 1800, 21000},
1250 { 1625, 22000},
1251 { 1462, 23000},
1252 { 1324, 24000},
1253 { 1175, 25000},
1254 { 1063, 26000},
1255 { 980, 27000},
1256 { 907, 28000},
1257 { 840, 29000},
1258 { 788, 30000},
1259 };
1260
1261 static const struct linear_segments cnr_64qam_table[] = {
1262 { 3922688, 0},
1263 { 3920384, 1000},
1264 { 3902720, 2000},
1265 { 3894784, 3000},
1266 { 3882496, 4000},
1267 { 3872768, 5000},
1268 { 3858944, 6000},
1269 { 3851520, 7000},
1270 { 3838976, 8000},
1271 { 3829248, 9000},
1272 { 3818240, 10000},
1273 { 3806976, 11000},
1274 { 3791872, 12000},
1275 { 3767040, 13000},
1276 { 3720960, 14000},
1277 { 3637504, 15000},
1278 { 3498496, 16000},
1279 { 3296000, 17000},
1280 { 3031040, 18000},
1281 { 2715392, 19000},
1282 { 2362624, 20000},
1283 { 1963264, 21000},
1284 { 1649664, 22000},
1285 { 1366784, 23000},
1286 { 1120768, 24000},
1287 { 890880, 25000},
1288 { 723456, 26000},
1289 { 612096, 27000},
1290 { 518912, 28000},
1291 { 448256, 29000},
1292 { 388864, 30000},
1293 };
1294
1295 static const struct linear_segments cnr_16qam_table[] = {
1296 { 5314816, 0},
1297 { 5219072, 1000},
1298 { 5118720, 2000},
1299 { 4998912, 3000},
1300 { 4875520, 4000},
1301 { 4736000, 5000},
1302 { 4604160, 6000},
1303 { 4458752, 7000},
1304 { 4300288, 8000},
1305 { 4092928, 9000},
1306 { 3836160, 10000},
1307 { 3521024, 11000},
1308 { 3155968, 12000},
1309 { 2756864, 13000},
1310 { 2347008, 14000},
1311 { 1955072, 15000},
1312 { 1593600, 16000},
1313 { 1297920, 17000},
1314 { 1043968, 18000},
1315 { 839680, 19000},
1316 { 672256, 20000},
1317 { 523008, 21000},
1318 { 424704, 22000},
1319 { 345088, 23000},
1320 { 280064, 24000},
1321 { 221440, 25000},
1322 { 179712, 26000},
1323 { 151040, 27000},
1324 { 128512, 28000},
1325 { 110080, 29000},
1326 { 95744, 30000},
1327 };
1328
1329 static const struct linear_segments cnr_qpsk_table[] = {
1330 { 2834176, 0},
1331 { 2683648, 1000},
1332 { 2536960, 2000},
1333 { 2391808, 3000},
1334 { 2133248, 4000},
1335 { 1906176, 5000},
1336 { 1666560, 6000},
1337 { 1422080, 7000},
1338 { 1189632, 8000},
1339 { 976384, 9000},
1340 { 790272, 10000},
1341 { 633344, 11000},
1342 { 505600, 12000},
1343 { 402944, 13000},
1344 { 320768, 14000},
1345 { 255488, 15000},
1346 { 204032, 16000},
1347 { 163072, 17000},
1348 { 130304, 18000},
1349 { 105216, 19000},
1350 { 83456, 20000},
1351 { 65024, 21000},
1352 { 52480, 22000},
1353 { 42752, 23000},
1354 { 34560, 24000},
1355 { 27136, 25000},
1356 { 22016, 26000},
1357 { 18432, 27000},
1358 { 15616, 28000},
1359 { 13312, 29000},
1360 { 11520, 30000},
1361 };
1362
1363 static u32 interpolate_value(u32 value, const struct linear_segments *segments,
1364 unsigned len)
1365 {
1366 u64 tmp64;
1367 u32 dx, dy;
1368 int i, ret;
1369
1370 if (value >= segments[0].x)
1371 return segments[0].y;
1372 if (value < segments[len-1].x)
1373 return segments[len-1].y;
1374
1375 for (i = 1; i < len - 1; i++) {
1376 /* If value is identical, no need to interpolate */
1377 if (value == segments[i].x)
1378 return segments[i].y;
1379 if (value > segments[i].x)
1380 break;
1381 }
1382
1383 /* Linear interpolation between the two (x,y) points */
1384 dy = segments[i].y - segments[i - 1].y;
1385 dx = segments[i - 1].x - segments[i].x;
1386 tmp64 = value - segments[i].x;
1387 tmp64 *= dy;
1388 do_div(tmp64, dx);
1389 ret = segments[i].y - tmp64;
1390
1391 return ret;
1392 }
1393
1394 static int mb86a20s_get_main_CNR(struct dvb_frontend *fe)
1395 {
1396 struct mb86a20s_state *state = fe->demodulator_priv;
1397 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1398 u32 cnr_linear, cnr;
1399 int rc, val;
1400
1401 /* Check if CNR is available */
1402 rc = mb86a20s_readreg(state, 0x45);
1403 if (rc < 0)
1404 return rc;
1405
1406 if (!(rc & 0x40)) {
1407 dev_dbg(&state->i2c->dev, "%s: CNR is not available yet.\n",
1408 __func__);
1409 return -EBUSY;
1410 }
1411 val = rc;
1412
1413 rc = mb86a20s_readreg(state, 0x46);
1414 if (rc < 0)
1415 return rc;
1416 cnr_linear = rc << 8;
1417
1418 rc = mb86a20s_readreg(state, 0x46);
1419 if (rc < 0)
1420 return rc;
1421 cnr_linear |= rc;
1422
1423 cnr = interpolate_value(cnr_linear,
1424 cnr_to_db_table, ARRAY_SIZE(cnr_to_db_table));
1425
1426 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1427 c->cnr.stat[0].svalue = cnr;
1428
1429 dev_dbg(&state->i2c->dev, "%s: CNR is %d.%03d dB (%d)\n",
1430 __func__, cnr / 1000, cnr % 1000, cnr_linear);
1431
1432 /* CNR counter reset */
1433 rc = mb86a20s_writereg(state, 0x45, val | 0x10);
1434 if (rc < 0)
1435 return rc;
1436 rc = mb86a20s_writereg(state, 0x45, val & 0x6f);
1437
1438 return rc;
1439 }
1440
1441 static int mb86a20s_get_blk_error_layer_CNR(struct dvb_frontend *fe)
1442 {
1443 struct mb86a20s_state *state = fe->demodulator_priv;
1444 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1445 u32 mer, cnr;
1446 int rc, val, layer;
1447 const struct linear_segments *segs;
1448 unsigned segs_len;
1449
1450 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1451
1452 /* Check if the measures are already available */
1453 rc = mb86a20s_writereg(state, 0x50, 0x5b);
1454 if (rc < 0)
1455 return rc;
1456 rc = mb86a20s_readreg(state, 0x51);
1457 if (rc < 0)
1458 return rc;
1459
1460 /* Check if data is available */
1461 if (!(rc & 0x01)) {
1462 dev_dbg(&state->i2c->dev,
1463 "%s: MER measures aren't available yet.\n", __func__);
1464 return -EBUSY;
1465 }
1466
1467 /* Read all layers */
1468 for (layer = 0; layer < NUM_LAYERS; layer++) {
1469 if (!(c->isdbt_layer_enabled & (1 << layer))) {
1470 c->cnr.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
1471 continue;
1472 }
1473
1474 rc = mb86a20s_writereg(state, 0x50, 0x52 + layer * 3);
1475 if (rc < 0)
1476 return rc;
1477 rc = mb86a20s_readreg(state, 0x51);
1478 if (rc < 0)
1479 return rc;
1480 mer = rc << 16;
1481 rc = mb86a20s_writereg(state, 0x50, 0x53 + layer * 3);
1482 if (rc < 0)
1483 return rc;
1484 rc = mb86a20s_readreg(state, 0x51);
1485 if (rc < 0)
1486 return rc;
1487 mer |= rc << 8;
1488 rc = mb86a20s_writereg(state, 0x50, 0x54 + layer * 3);
1489 if (rc < 0)
1490 return rc;
1491 rc = mb86a20s_readreg(state, 0x51);
1492 if (rc < 0)
1493 return rc;
1494 mer |= rc;
1495
1496 switch (c->layer[layer].modulation) {
1497 case DQPSK:
1498 case QPSK:
1499 segs = cnr_qpsk_table;
1500 segs_len = ARRAY_SIZE(cnr_qpsk_table);
1501 break;
1502 case QAM_16:
1503 segs = cnr_16qam_table;
1504 segs_len = ARRAY_SIZE(cnr_16qam_table);
1505 break;
1506 default:
1507 case QAM_64:
1508 segs = cnr_64qam_table;
1509 segs_len = ARRAY_SIZE(cnr_64qam_table);
1510 break;
1511 }
1512 cnr = interpolate_value(mer, segs, segs_len);
1513
1514 c->cnr.stat[1 + layer].scale = FE_SCALE_DECIBEL;
1515 c->cnr.stat[1 + layer].svalue = cnr;
1516
1517 dev_dbg(&state->i2c->dev,
1518 "%s: CNR for layer %c is %d.%03d dB (MER = %d).\n",
1519 __func__, 'A' + layer, cnr / 1000, cnr % 1000, mer);
1520
1521 }
1522
1523 /* Start a new MER measurement */
1524 /* MER counter reset */
1525 rc = mb86a20s_writereg(state, 0x50, 0x50);
1526 if (rc < 0)
1527 return rc;
1528 rc = mb86a20s_readreg(state, 0x51);
1529 if (rc < 0)
1530 return rc;
1531 val = rc;
1532
1533 rc = mb86a20s_writereg(state, 0x51, val | 0x01);
1534 if (rc < 0)
1535 return rc;
1536 rc = mb86a20s_writereg(state, 0x51, val & 0x06);
1537 if (rc < 0)
1538 return rc;
1539
1540 return 0;
1541 }
1542
1543 static void mb86a20s_stats_not_ready(struct dvb_frontend *fe)
1544 {
1545 struct mb86a20s_state *state = fe->demodulator_priv;
1546 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1547 int layer;
1548
1549 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1550
1551 /* Fill the length of each status counter */
1552
1553 /* Only global stats */
1554 c->strength.len = 1;
1555
1556 /* Per-layer stats - 3 layers + global */
1557 c->cnr.len = NUM_LAYERS + 1;
1558 c->pre_bit_error.len = NUM_LAYERS + 1;
1559 c->pre_bit_count.len = NUM_LAYERS + 1;
1560 c->post_bit_error.len = NUM_LAYERS + 1;
1561 c->post_bit_count.len = NUM_LAYERS + 1;
1562 c->block_error.len = NUM_LAYERS + 1;
1563 c->block_count.len = NUM_LAYERS + 1;
1564
1565 /* Signal is always available */
1566 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
1567 c->strength.stat[0].uvalue = 0;
1568
1569 /* Put all of them at FE_SCALE_NOT_AVAILABLE */
1570 for (layer = 0; layer < NUM_LAYERS + 1; layer++) {
1571 c->cnr.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
1572 c->pre_bit_error.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
1573 c->pre_bit_count.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
1574 c->post_bit_error.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
1575 c->post_bit_count.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
1576 c->block_error.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
1577 c->block_count.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
1578 }
1579 }
1580
1581 static int mb86a20s_get_stats(struct dvb_frontend *fe, int status_nr)
1582 {
1583 struct mb86a20s_state *state = fe->demodulator_priv;
1584 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1585 int rc = 0, layer;
1586 u32 bit_error = 0, bit_count = 0;
1587 u32 t_pre_bit_error = 0, t_pre_bit_count = 0;
1588 u32 t_post_bit_error = 0, t_post_bit_count = 0;
1589 u32 block_error = 0, block_count = 0;
1590 u32 t_block_error = 0, t_block_count = 0;
1591 int active_layers = 0, pre_ber_layers = 0, post_ber_layers = 0;
1592 int per_layers = 0;
1593
1594 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1595
1596 mb86a20s_get_main_CNR(fe);
1597
1598 /* Get per-layer stats */
1599 mb86a20s_get_blk_error_layer_CNR(fe);
1600
1601 /*
1602 * At state 7, only CNR is available
1603 * For BER measures, state=9 is required
1604 * FIXME: we may get MER measures with state=8
1605 */
1606 if (status_nr < 9)
1607 return 0;
1608
1609 for (layer = 0; layer < NUM_LAYERS; layer++) {
1610 if (c->isdbt_layer_enabled & (1 << layer)) {
1611 /* Layer is active and has rc segments */
1612 active_layers++;
1613
1614 /* Handle BER before vterbi */
1615 rc = mb86a20s_get_pre_ber(fe, layer,
1616 &bit_error, &bit_count);
1617 if (rc >= 0) {
1618 c->pre_bit_error.stat[1 + layer].scale = FE_SCALE_COUNTER;
1619 c->pre_bit_error.stat[1 + layer].uvalue += bit_error;
1620 c->pre_bit_count.stat[1 + layer].scale = FE_SCALE_COUNTER;
1621 c->pre_bit_count.stat[1 + layer].uvalue += bit_count;
1622 } else if (rc != -EBUSY) {
1623 /*
1624 * If an I/O error happened,
1625 * measures are now unavailable
1626 */
1627 c->pre_bit_error.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
1628 c->pre_bit_count.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
1629 dev_err(&state->i2c->dev,
1630 "%s: Can't get BER for layer %c (error %d).\n",
1631 __func__, 'A' + layer, rc);
1632 }
1633 if (c->block_error.stat[1 + layer].scale != FE_SCALE_NOT_AVAILABLE)
1634 pre_ber_layers++;
1635
1636 /* Handle BER post vterbi */
1637 rc = mb86a20s_get_post_ber(fe, layer,
1638 &bit_error, &bit_count);
1639 if (rc >= 0) {
1640 c->post_bit_error.stat[1 + layer].scale = FE_SCALE_COUNTER;
1641 c->post_bit_error.stat[1 + layer].uvalue += bit_error;
1642 c->post_bit_count.stat[1 + layer].scale = FE_SCALE_COUNTER;
1643 c->post_bit_count.stat[1 + layer].uvalue += bit_count;
1644 } else if (rc != -EBUSY) {
1645 /*
1646 * If an I/O error happened,
1647 * measures are now unavailable
1648 */
1649 c->post_bit_error.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
1650 c->post_bit_count.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
1651 dev_err(&state->i2c->dev,
1652 "%s: Can't get BER for layer %c (error %d).\n",
1653 __func__, 'A' + layer, rc);
1654 }
1655 if (c->block_error.stat[1 + layer].scale != FE_SCALE_NOT_AVAILABLE)
1656 post_ber_layers++;
1657
1658 /* Handle Block errors for PER/UCB reports */
1659 rc = mb86a20s_get_blk_error(fe, layer,
1660 &block_error,
1661 &block_count);
1662 if (rc >= 0) {
1663 c->block_error.stat[1 + layer].scale = FE_SCALE_COUNTER;
1664 c->block_error.stat[1 + layer].uvalue += block_error;
1665 c->block_count.stat[1 + layer].scale = FE_SCALE_COUNTER;
1666 c->block_count.stat[1 + layer].uvalue += block_count;
1667 } else if (rc != -EBUSY) {
1668 /*
1669 * If an I/O error happened,
1670 * measures are now unavailable
1671 */
1672 c->block_error.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
1673 c->block_count.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
1674 dev_err(&state->i2c->dev,
1675 "%s: Can't get PER for layer %c (error %d).\n",
1676 __func__, 'A' + layer, rc);
1677
1678 }
1679 if (c->block_error.stat[1 + layer].scale != FE_SCALE_NOT_AVAILABLE)
1680 per_layers++;
1681
1682 /* Update total preBER */
1683 t_pre_bit_error += c->pre_bit_error.stat[1 + layer].uvalue;
1684 t_pre_bit_count += c->pre_bit_count.stat[1 + layer].uvalue;
1685
1686 /* Update total postBER */
1687 t_post_bit_error += c->post_bit_error.stat[1 + layer].uvalue;
1688 t_post_bit_count += c->post_bit_count.stat[1 + layer].uvalue;
1689
1690 /* Update total PER */
1691 t_block_error += c->block_error.stat[1 + layer].uvalue;
1692 t_block_count += c->block_count.stat[1 + layer].uvalue;
1693 }
1694 }
1695
1696 /*
1697 * Start showing global count if at least one error count is
1698 * available.
1699 */
1700 if (pre_ber_layers) {
1701 /*
1702 * At least one per-layer BER measure was read. We can now
1703 * calculate the total BER
1704 *
1705 * Total Bit Error/Count is calculated as the sum of the
1706 * bit errors on all active layers.
1707 */
1708 c->pre_bit_error.stat[0].scale = FE_SCALE_COUNTER;
1709 c->pre_bit_error.stat[0].uvalue = t_pre_bit_error;
1710 c->pre_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1711 c->pre_bit_count.stat[0].uvalue = t_pre_bit_count;
1712 } else {
1713 c->pre_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1714 c->pre_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1715 }
1716
1717 /*
1718 * Start showing global count if at least one error count is
1719 * available.
1720 */
1721 if (post_ber_layers) {
1722 /*
1723 * At least one per-layer BER measure was read. We can now
1724 * calculate the total BER
1725 *
1726 * Total Bit Error/Count is calculated as the sum of the
1727 * bit errors on all active layers.
1728 */
1729 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
1730 c->post_bit_error.stat[0].uvalue = t_post_bit_error;
1731 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1732 c->post_bit_count.stat[0].uvalue = t_post_bit_count;
1733 } else {
1734 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1735 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1736 }
1737
1738 if (per_layers) {
1739 /*
1740 * At least one per-layer UCB measure was read. We can now
1741 * calculate the total UCB
1742 *
1743 * Total block Error/Count is calculated as the sum of the
1744 * block errors on all active layers.
1745 */
1746 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
1747 c->block_error.stat[0].uvalue = t_block_error;
1748 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
1749 c->block_count.stat[0].uvalue = t_block_count;
1750 } else {
1751 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1752 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
1753 }
1754
1755 return rc;
1756 }
1757
1758 /*
1759 * The functions below are called via DVB callbacks, so they need to
1760 * properly use the I2C gate control
1761 */
1762
1763 static int mb86a20s_initfe(struct dvb_frontend *fe)
1764 {
1765 struct mb86a20s_state *state = fe->demodulator_priv;
1766 u64 pll;
1767 u32 fclk;
1768 int rc;
1769 u8 regD5 = 1, reg71, reg09 = 0x3a;
1770
1771 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1772
1773 if (fe->ops.i2c_gate_ctrl)
1774 fe->ops.i2c_gate_ctrl(fe, 0);
1775
1776 /* Initialize the frontend */
1777 rc = mb86a20s_writeregdata(state, mb86a20s_init1);
1778 if (rc < 0)
1779 goto err;
1780
1781 if (!state->inversion)
1782 reg09 |= 0x04;
1783 rc = mb86a20s_writereg(state, 0x09, reg09);
1784 if (rc < 0)
1785 goto err;
1786 if (!state->bw)
1787 reg71 = 1;
1788 else
1789 reg71 = 0;
1790 rc = mb86a20s_writereg(state, 0x39, reg71);
1791 if (rc < 0)
1792 goto err;
1793 rc = mb86a20s_writereg(state, 0x71, state->bw);
1794 if (rc < 0)
1795 goto err;
1796 if (state->subchannel) {
1797 rc = mb86a20s_writereg(state, 0x44, state->subchannel);
1798 if (rc < 0)
1799 goto err;
1800 }
1801
1802 fclk = state->config->fclk;
1803 if (!fclk)
1804 fclk = 32571428;
1805
1806 /* Adjust IF frequency to match tuner */
1807 if (fe->ops.tuner_ops.get_if_frequency)
1808 fe->ops.tuner_ops.get_if_frequency(fe, &state->if_freq);
1809
1810 if (!state->if_freq)
1811 state->if_freq = 3300000;
1812
1813 pll = (((u64)1) << 34) * state->if_freq;
1814 do_div(pll, 63 * fclk);
1815 pll = (1 << 25) - pll;
1816 rc = mb86a20s_writereg(state, 0x28, 0x2a);
1817 if (rc < 0)
1818 goto err;
1819 rc = mb86a20s_writereg(state, 0x29, (pll >> 16) & 0xff);
1820 if (rc < 0)
1821 goto err;
1822 rc = mb86a20s_writereg(state, 0x2a, (pll >> 8) & 0xff);
1823 if (rc < 0)
1824 goto err;
1825 rc = mb86a20s_writereg(state, 0x2b, pll & 0xff);
1826 if (rc < 0)
1827 goto err;
1828 dev_dbg(&state->i2c->dev, "%s: fclk=%d, IF=%d, clock reg=0x%06llx\n",
1829 __func__, fclk, state->if_freq, (long long)pll);
1830
1831 /* pll = freq[Hz] * 2^24/10^6 / 16.285714286 */
1832 pll = state->if_freq * 1677721600L;
1833 do_div(pll, 1628571429L);
1834 rc = mb86a20s_writereg(state, 0x28, 0x20);
1835 if (rc < 0)
1836 goto err;
1837 rc = mb86a20s_writereg(state, 0x29, (pll >> 16) & 0xff);
1838 if (rc < 0)
1839 goto err;
1840 rc = mb86a20s_writereg(state, 0x2a, (pll >> 8) & 0xff);
1841 if (rc < 0)
1842 goto err;
1843 rc = mb86a20s_writereg(state, 0x2b, pll & 0xff);
1844 if (rc < 0)
1845 goto err;
1846 dev_dbg(&state->i2c->dev, "%s: IF=%d, IF reg=0x%06llx\n",
1847 __func__, state->if_freq, (long long)pll);
1848
1849 if (!state->config->is_serial)
1850 regD5 &= ~1;
1851
1852 rc = mb86a20s_writereg(state, 0x50, 0xd5);
1853 if (rc < 0)
1854 goto err;
1855 rc = mb86a20s_writereg(state, 0x51, regD5);
1856 if (rc < 0)
1857 goto err;
1858
1859 rc = mb86a20s_writeregdata(state, mb86a20s_init2);
1860 if (rc < 0)
1861 goto err;
1862
1863
1864 err:
1865 if (fe->ops.i2c_gate_ctrl)
1866 fe->ops.i2c_gate_ctrl(fe, 1);
1867
1868 if (rc < 0) {
1869 state->need_init = true;
1870 dev_info(&state->i2c->dev,
1871 "mb86a20s: Init failed. Will try again later\n");
1872 } else {
1873 state->need_init = false;
1874 dev_dbg(&state->i2c->dev, "Initialization succeeded.\n");
1875 }
1876 return rc;
1877 }
1878
1879 static int mb86a20s_set_frontend(struct dvb_frontend *fe)
1880 {
1881 struct mb86a20s_state *state = fe->demodulator_priv;
1882 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1883 int rc, if_freq;
1884 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1885
1886 if (!c->isdbt_layer_enabled)
1887 c->isdbt_layer_enabled = 7;
1888
1889 if (c->isdbt_layer_enabled == 1)
1890 state->bw = MB86A20S_1SEG;
1891 else if (c->isdbt_partial_reception)
1892 state->bw = MB86A20S_13SEG_PARTIAL;
1893 else
1894 state->bw = MB86A20S_13SEG;
1895
1896 if (c->inversion == INVERSION_ON)
1897 state->inversion = true;
1898 else
1899 state->inversion = false;
1900
1901 if (!c->isdbt_sb_mode) {
1902 state->subchannel = 0;
1903 } else {
1904 if (c->isdbt_sb_subchannel >= ARRAY_SIZE(mb86a20s_subchannel))
1905 c->isdbt_sb_subchannel = 0;
1906
1907 state->subchannel = mb86a20s_subchannel[c->isdbt_sb_subchannel];
1908 }
1909
1910 /*
1911 * Gate should already be opened, but it doesn't hurt to
1912 * double-check
1913 */
1914 if (fe->ops.i2c_gate_ctrl)
1915 fe->ops.i2c_gate_ctrl(fe, 1);
1916 fe->ops.tuner_ops.set_params(fe);
1917
1918 if (fe->ops.tuner_ops.get_if_frequency)
1919 fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
1920
1921 /*
1922 * Make it more reliable: if, for some reason, the initial
1923 * device initialization doesn't happen, initialize it when
1924 * a SBTVD parameters are adjusted.
1925 *
1926 * Unfortunately, due to a hard to track bug at tda829x/tda18271,
1927 * the agc callback logic is not called during DVB attach time,
1928 * causing mb86a20s to not be initialized with Kworld SBTVD.
1929 * So, this hack is needed, in order to make Kworld SBTVD to work.
1930 *
1931 * It is also needed to change the IF after the initial init.
1932 *
1933 * HACK: Always init the frontend when set_frontend is called:
1934 * it was noticed that, on some devices, it fails to lock on a
1935 * different channel. So, it is better to reset everything, even
1936 * wasting some time, than to loose channel lock.
1937 */
1938 mb86a20s_initfe(fe);
1939
1940 if (fe->ops.i2c_gate_ctrl)
1941 fe->ops.i2c_gate_ctrl(fe, 0);
1942
1943 rc = mb86a20s_writeregdata(state, mb86a20s_reset_reception);
1944 mb86a20s_reset_counters(fe);
1945 mb86a20s_stats_not_ready(fe);
1946
1947 if (fe->ops.i2c_gate_ctrl)
1948 fe->ops.i2c_gate_ctrl(fe, 1);
1949
1950 return rc;
1951 }
1952
1953 static int mb86a20s_read_status_and_stats(struct dvb_frontend *fe,
1954 enum fe_status *status)
1955 {
1956 struct mb86a20s_state *state = fe->demodulator_priv;
1957 int rc, status_nr;
1958
1959 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
1960
1961 if (fe->ops.i2c_gate_ctrl)
1962 fe->ops.i2c_gate_ctrl(fe, 0);
1963
1964 /* Get lock */
1965 status_nr = mb86a20s_read_status(fe, status);
1966 if (status_nr < 7) {
1967 mb86a20s_stats_not_ready(fe);
1968 mb86a20s_reset_frontend_cache(fe);
1969 }
1970 if (status_nr < 0) {
1971 dev_err(&state->i2c->dev,
1972 "%s: Can't read frontend lock status\n", __func__);
1973 goto error;
1974 }
1975
1976 /* Get signal strength */
1977 rc = mb86a20s_read_signal_strength(fe);
1978 if (rc < 0) {
1979 dev_err(&state->i2c->dev,
1980 "%s: Can't reset VBER registers.\n", __func__);
1981 mb86a20s_stats_not_ready(fe);
1982 mb86a20s_reset_frontend_cache(fe);
1983
1984 rc = 0; /* Status is OK */
1985 goto error;
1986 }
1987
1988 if (status_nr >= 7) {
1989 /* Get TMCC info*/
1990 rc = mb86a20s_get_frontend(fe);
1991 if (rc < 0) {
1992 dev_err(&state->i2c->dev,
1993 "%s: Can't get FE TMCC data.\n", __func__);
1994 rc = 0; /* Status is OK */
1995 goto error;
1996 }
1997
1998 /* Get statistics */
1999 rc = mb86a20s_get_stats(fe, status_nr);
2000 if (rc < 0 && rc != -EBUSY) {
2001 dev_err(&state->i2c->dev,
2002 "%s: Can't get FE statistics.\n", __func__);
2003 rc = 0;
2004 goto error;
2005 }
2006 rc = 0; /* Don't return EBUSY to userspace */
2007 }
2008 goto ok;
2009
2010 error:
2011 mb86a20s_stats_not_ready(fe);
2012
2013 ok:
2014 if (fe->ops.i2c_gate_ctrl)
2015 fe->ops.i2c_gate_ctrl(fe, 1);
2016
2017 return rc;
2018 }
2019
2020 static int mb86a20s_read_signal_strength_from_cache(struct dvb_frontend *fe,
2021 u16 *strength)
2022 {
2023 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2024
2025
2026 *strength = c->strength.stat[0].uvalue;
2027
2028 return 0;
2029 }
2030
2031 static int mb86a20s_get_frontend_dummy(struct dvb_frontend *fe)
2032 {
2033 /*
2034 * get_frontend is now handled together with other stats
2035 * retrival, when read_status() is called, as some statistics
2036 * will depend on the layers detection.
2037 */
2038 return 0;
2039 };
2040
2041 static int mb86a20s_tune(struct dvb_frontend *fe,
2042 bool re_tune,
2043 unsigned int mode_flags,
2044 unsigned int *delay,
2045 enum fe_status *status)
2046 {
2047 struct mb86a20s_state *state = fe->demodulator_priv;
2048 int rc = 0;
2049
2050 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
2051
2052 if (re_tune)
2053 rc = mb86a20s_set_frontend(fe);
2054
2055 if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
2056 mb86a20s_read_status_and_stats(fe, status);
2057
2058 return rc;
2059 }
2060
2061 static void mb86a20s_release(struct dvb_frontend *fe)
2062 {
2063 struct mb86a20s_state *state = fe->demodulator_priv;
2064
2065 dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
2066
2067 kfree(state);
2068 }
2069
2070 static struct dvb_frontend_ops mb86a20s_ops;
2071
2072 struct dvb_frontend *mb86a20s_attach(const struct mb86a20s_config *config,
2073 struct i2c_adapter *i2c)
2074 {
2075 struct mb86a20s_state *state;
2076 u8 rev;
2077
2078 dev_dbg(&i2c->dev, "%s called.\n", __func__);
2079
2080 /* allocate memory for the internal state */
2081 state = kzalloc(sizeof(struct mb86a20s_state), GFP_KERNEL);
2082 if (state == NULL) {
2083 dev_err(&i2c->dev,
2084 "%s: unable to allocate memory for state\n", __func__);
2085 goto error;
2086 }
2087
2088 /* setup the state */
2089 state->config = config;
2090 state->i2c = i2c;
2091
2092 /* create dvb_frontend */
2093 memcpy(&state->frontend.ops, &mb86a20s_ops,
2094 sizeof(struct dvb_frontend_ops));
2095 state->frontend.demodulator_priv = state;
2096
2097 /* Check if it is a mb86a20s frontend */
2098 rev = mb86a20s_readreg(state, 0);
2099
2100 if (rev == 0x13) {
2101 dev_info(&i2c->dev,
2102 "Detected a Fujitsu mb86a20s frontend\n");
2103 } else {
2104 dev_dbg(&i2c->dev,
2105 "Frontend revision %d is unknown - aborting.\n",
2106 rev);
2107 goto error;
2108 }
2109
2110 return &state->frontend;
2111
2112 error:
2113 kfree(state);
2114 return NULL;
2115 }
2116 EXPORT_SYMBOL(mb86a20s_attach);
2117
2118 static struct dvb_frontend_ops mb86a20s_ops = {
2119 .delsys = { SYS_ISDBT },
2120 /* Use dib8000 values per default */
2121 .info = {
2122 .name = "Fujitsu mb86A20s",
2123 .caps = FE_CAN_RECOVER |
2124 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
2125 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
2126 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
2127 FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_QAM_AUTO |
2128 FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
2129 /* Actually, those values depend on the used tuner */
2130 .frequency_min = 45000000,
2131 .frequency_max = 864000000,
2132 .frequency_stepsize = 62500,
2133 },
2134
2135 .release = mb86a20s_release,
2136
2137 .init = mb86a20s_initfe,
2138 .set_frontend = mb86a20s_set_frontend,
2139 .get_frontend = mb86a20s_get_frontend_dummy,
2140 .read_status = mb86a20s_read_status_and_stats,
2141 .read_signal_strength = mb86a20s_read_signal_strength_from_cache,
2142 .tune = mb86a20s_tune,
2143 };
2144
2145 MODULE_DESCRIPTION("DVB Frontend module for Fujitsu mb86A20s hardware");
2146 MODULE_AUTHOR("Mauro Carvalho Chehab");
2147 MODULE_LICENSE("GPL");
Linux with added FPC-III support