1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | Auvitek AU8522 QAM/8VSB demodulator driver |
4 | |
5 | Copyright (C) 2008 Steven Toth <stoth@linuxtv.org> |
6 | |
7 | |
8 | */ |
9 | |
10 | #include <linux/kernel.h> |
11 | #include <linux/init.h> |
12 | #include <linux/module.h> |
13 | #include <linux/string.h> |
14 | #include <linux/delay.h> |
15 | #include <media/dvb_frontend.h> |
16 | #include "au8522.h" |
17 | #include "au8522_priv.h" |
18 | |
19 | static int debug; |
20 | static int zv_mode = 1; /* default to on */ |
21 | |
22 | #define dprintk(arg...)\ |
23 | do { if (debug)\ |
24 | printk(arg);\ |
25 | } while (0) |
26 | |
27 | struct mse2snr_tab { |
28 | u16 val; |
29 | u16 data; |
30 | }; |
31 | |
32 | /* VSB SNR lookup table */ |
33 | static struct mse2snr_tab vsb_mse2snr_tab[] = { |
34 | { 0, 270 }, |
35 | { 2, 250 }, |
36 | { 3, 240 }, |
37 | { 5, 230 }, |
38 | { 7, 220 }, |
39 | { 9, 210 }, |
40 | { 12, 200 }, |
41 | { 13, 195 }, |
42 | { 15, 190 }, |
43 | { 17, 185 }, |
44 | { 19, 180 }, |
45 | { 21, 175 }, |
46 | { 24, 170 }, |
47 | { 27, 165 }, |
48 | { 31, 160 }, |
49 | { 32, 158 }, |
50 | { 33, 156 }, |
51 | { 36, 152 }, |
52 | { 37, 150 }, |
53 | { 39, 148 }, |
54 | { 40, 146 }, |
55 | { 41, 144 }, |
56 | { 43, 142 }, |
57 | { 44, 140 }, |
58 | { 48, 135 }, |
59 | { 50, 130 }, |
60 | { 43, 142 }, |
61 | { 53, 125 }, |
62 | { 56, 120 }, |
63 | { 256, 115 }, |
64 | }; |
65 | |
66 | /* QAM64 SNR lookup table */ |
67 | static struct mse2snr_tab qam64_mse2snr_tab[] = { |
68 | { 15, 0 }, |
69 | { 16, 290 }, |
70 | { 17, 288 }, |
71 | { 18, 286 }, |
72 | { 19, 284 }, |
73 | { 20, 282 }, |
74 | { 21, 281 }, |
75 | { 22, 279 }, |
76 | { 23, 277 }, |
77 | { 24, 275 }, |
78 | { 25, 273 }, |
79 | { 26, 271 }, |
80 | { 27, 269 }, |
81 | { 28, 268 }, |
82 | { 29, 266 }, |
83 | { 30, 264 }, |
84 | { 31, 262 }, |
85 | { 32, 260 }, |
86 | { 33, 259 }, |
87 | { 34, 258 }, |
88 | { 35, 256 }, |
89 | { 36, 255 }, |
90 | { 37, 254 }, |
91 | { 38, 252 }, |
92 | { 39, 251 }, |
93 | { 40, 250 }, |
94 | { 41, 249 }, |
95 | { 42, 248 }, |
96 | { 43, 246 }, |
97 | { 44, 245 }, |
98 | { 45, 244 }, |
99 | { 46, 242 }, |
100 | { 47, 241 }, |
101 | { 48, 240 }, |
102 | { 50, 239 }, |
103 | { 51, 238 }, |
104 | { 53, 237 }, |
105 | { 54, 236 }, |
106 | { 56, 235 }, |
107 | { 57, 234 }, |
108 | { 59, 233 }, |
109 | { 60, 232 }, |
110 | { 62, 231 }, |
111 | { 63, 230 }, |
112 | { 65, 229 }, |
113 | { 67, 228 }, |
114 | { 68, 227 }, |
115 | { 70, 226 }, |
116 | { 71, 225 }, |
117 | { 73, 224 }, |
118 | { 74, 223 }, |
119 | { 76, 222 }, |
120 | { 78, 221 }, |
121 | { 80, 220 }, |
122 | { 82, 219 }, |
123 | { 85, 218 }, |
124 | { 88, 217 }, |
125 | { 90, 216 }, |
126 | { 92, 215 }, |
127 | { 93, 214 }, |
128 | { 94, 212 }, |
129 | { 95, 211 }, |
130 | { 97, 210 }, |
131 | { 99, 209 }, |
132 | { 101, 208 }, |
133 | { 102, 207 }, |
134 | { 104, 206 }, |
135 | { 107, 205 }, |
136 | { 111, 204 }, |
137 | { 114, 203 }, |
138 | { 118, 202 }, |
139 | { 122, 201 }, |
140 | { 125, 200 }, |
141 | { 128, 199 }, |
142 | { 130, 198 }, |
143 | { 132, 197 }, |
144 | { 256, 190 }, |
145 | }; |
146 | |
147 | /* QAM256 SNR lookup table */ |
148 | static struct mse2snr_tab qam256_mse2snr_tab[] = { |
149 | { 15, 0 }, |
150 | { 16, 400 }, |
151 | { 17, 398 }, |
152 | { 18, 396 }, |
153 | { 19, 394 }, |
154 | { 20, 392 }, |
155 | { 21, 390 }, |
156 | { 22, 388 }, |
157 | { 23, 386 }, |
158 | { 24, 384 }, |
159 | { 25, 382 }, |
160 | { 26, 380 }, |
161 | { 27, 379 }, |
162 | { 28, 378 }, |
163 | { 29, 377 }, |
164 | { 30, 376 }, |
165 | { 31, 375 }, |
166 | { 32, 374 }, |
167 | { 33, 373 }, |
168 | { 34, 372 }, |
169 | { 35, 371 }, |
170 | { 36, 370 }, |
171 | { 37, 362 }, |
172 | { 38, 354 }, |
173 | { 39, 346 }, |
174 | { 40, 338 }, |
175 | { 41, 330 }, |
176 | { 42, 328 }, |
177 | { 43, 326 }, |
178 | { 44, 324 }, |
179 | { 45, 322 }, |
180 | { 46, 320 }, |
181 | { 47, 319 }, |
182 | { 48, 318 }, |
183 | { 49, 317 }, |
184 | { 50, 316 }, |
185 | { 51, 315 }, |
186 | { 52, 314 }, |
187 | { 53, 313 }, |
188 | { 54, 312 }, |
189 | { 55, 311 }, |
190 | { 56, 310 }, |
191 | { 57, 308 }, |
192 | { 58, 306 }, |
193 | { 59, 304 }, |
194 | { 60, 302 }, |
195 | { 61, 300 }, |
196 | { 62, 298 }, |
197 | { 65, 295 }, |
198 | { 68, 294 }, |
199 | { 70, 293 }, |
200 | { 73, 292 }, |
201 | { 76, 291 }, |
202 | { 78, 290 }, |
203 | { 79, 289 }, |
204 | { 81, 288 }, |
205 | { 82, 287 }, |
206 | { 83, 286 }, |
207 | { 84, 285 }, |
208 | { 85, 284 }, |
209 | { 86, 283 }, |
210 | { 88, 282 }, |
211 | { 89, 281 }, |
212 | { 256, 280 }, |
213 | }; |
214 | |
215 | static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse, |
216 | u16 *snr) |
217 | { |
218 | int i, ret = -EINVAL; |
219 | dprintk("%s()\n" , __func__); |
220 | |
221 | for (i = 0; i < sz; i++) { |
222 | if (mse < tab[i].val) { |
223 | *snr = tab[i].data; |
224 | ret = 0; |
225 | break; |
226 | } |
227 | } |
228 | dprintk("%s() snr=%d\n" , __func__, *snr); |
229 | return ret; |
230 | } |
231 | |
232 | static int au8522_set_if(struct dvb_frontend *fe, enum au8522_if_freq if_freq) |
233 | { |
234 | struct au8522_state *state = fe->demodulator_priv; |
235 | u8 r0b5, r0b6, r0b7; |
236 | char *ifmhz; |
237 | |
238 | switch (if_freq) { |
239 | case AU8522_IF_3_25MHZ: |
240 | ifmhz = "3.25" ; |
241 | r0b5 = 0x00; |
242 | r0b6 = 0x3d; |
243 | r0b7 = 0xa0; |
244 | break; |
245 | case AU8522_IF_4MHZ: |
246 | ifmhz = "4.00" ; |
247 | r0b5 = 0x00; |
248 | r0b6 = 0x4b; |
249 | r0b7 = 0xd9; |
250 | break; |
251 | case AU8522_IF_6MHZ: |
252 | ifmhz = "6.00" ; |
253 | r0b5 = 0xfb; |
254 | r0b6 = 0x8e; |
255 | r0b7 = 0x39; |
256 | break; |
257 | default: |
258 | dprintk("%s() IF Frequency not supported\n" , __func__); |
259 | return -EINVAL; |
260 | } |
261 | dprintk("%s() %s MHz\n" , __func__, ifmhz); |
262 | au8522_writereg(state, reg: 0x00b5, data: r0b5); |
263 | au8522_writereg(state, reg: 0x00b6, data: r0b6); |
264 | au8522_writereg(state, reg: 0x00b7, data: r0b7); |
265 | |
266 | return 0; |
267 | } |
268 | |
269 | /* VSB Modulation table */ |
270 | static struct { |
271 | u16 reg; |
272 | u16 data; |
273 | } VSB_mod_tab[] = { |
274 | { 0x0090, 0x84 }, |
275 | { 0x2005, 0x00 }, |
276 | { 0x0091, 0x80 }, |
277 | { 0x00a3, 0x0c }, |
278 | { 0x00a4, 0xe8 }, |
279 | { 0x0081, 0xc4 }, |
280 | { 0x00a5, 0x40 }, |
281 | { 0x00a7, 0x40 }, |
282 | { 0x00a6, 0x67 }, |
283 | { 0x0262, 0x20 }, |
284 | { 0x021c, 0x30 }, |
285 | { 0x00d8, 0x1a }, |
286 | { 0x0227, 0xa0 }, |
287 | { 0x0121, 0xff }, |
288 | { 0x00a8, 0xf0 }, |
289 | { 0x00a9, 0x05 }, |
290 | { 0x00aa, 0x77 }, |
291 | { 0x00ab, 0xf0 }, |
292 | { 0x00ac, 0x05 }, |
293 | { 0x00ad, 0x77 }, |
294 | { 0x00ae, 0x41 }, |
295 | { 0x00af, 0x66 }, |
296 | { 0x021b, 0xcc }, |
297 | { 0x021d, 0x80 }, |
298 | { 0x00a4, 0xe8 }, |
299 | { 0x0231, 0x13 }, |
300 | }; |
301 | |
302 | /* QAM64 Modulation table */ |
303 | static struct { |
304 | u16 reg; |
305 | u16 data; |
306 | } QAM64_mod_tab[] = { |
307 | { 0x00a3, 0x09 }, |
308 | { 0x00a4, 0x00 }, |
309 | { 0x0081, 0xc4 }, |
310 | { 0x00a5, 0x40 }, |
311 | { 0x00aa, 0x77 }, |
312 | { 0x00ad, 0x77 }, |
313 | { 0x00a6, 0x67 }, |
314 | { 0x0262, 0x20 }, |
315 | { 0x021c, 0x30 }, |
316 | { 0x00b8, 0x3e }, |
317 | { 0x00b9, 0xf0 }, |
318 | { 0x00ba, 0x01 }, |
319 | { 0x00bb, 0x18 }, |
320 | { 0x00bc, 0x50 }, |
321 | { 0x00bd, 0x00 }, |
322 | { 0x00be, 0xea }, |
323 | { 0x00bf, 0xef }, |
324 | { 0x00c0, 0xfc }, |
325 | { 0x00c1, 0xbd }, |
326 | { 0x00c2, 0x1f }, |
327 | { 0x00c3, 0xfc }, |
328 | { 0x00c4, 0xdd }, |
329 | { 0x00c5, 0xaf }, |
330 | { 0x00c6, 0x00 }, |
331 | { 0x00c7, 0x38 }, |
332 | { 0x00c8, 0x30 }, |
333 | { 0x00c9, 0x05 }, |
334 | { 0x00ca, 0x4a }, |
335 | { 0x00cb, 0xd0 }, |
336 | { 0x00cc, 0x01 }, |
337 | { 0x00cd, 0xd9 }, |
338 | { 0x00ce, 0x6f }, |
339 | { 0x00cf, 0xf9 }, |
340 | { 0x00d0, 0x70 }, |
341 | { 0x00d1, 0xdf }, |
342 | { 0x00d2, 0xf7 }, |
343 | { 0x00d3, 0xc2 }, |
344 | { 0x00d4, 0xdf }, |
345 | { 0x00d5, 0x02 }, |
346 | { 0x00d6, 0x9a }, |
347 | { 0x00d7, 0xd0 }, |
348 | { 0x0250, 0x0d }, |
349 | { 0x0251, 0xcd }, |
350 | { 0x0252, 0xe0 }, |
351 | { 0x0253, 0x05 }, |
352 | { 0x0254, 0xa7 }, |
353 | { 0x0255, 0xff }, |
354 | { 0x0256, 0xed }, |
355 | { 0x0257, 0x5b }, |
356 | { 0x0258, 0xae }, |
357 | { 0x0259, 0xe6 }, |
358 | { 0x025a, 0x3d }, |
359 | { 0x025b, 0x0f }, |
360 | { 0x025c, 0x0d }, |
361 | { 0x025d, 0xea }, |
362 | { 0x025e, 0xf2 }, |
363 | { 0x025f, 0x51 }, |
364 | { 0x0260, 0xf5 }, |
365 | { 0x0261, 0x06 }, |
366 | { 0x021a, 0x00 }, |
367 | { 0x0546, 0x40 }, |
368 | { 0x0210, 0xc7 }, |
369 | { 0x0211, 0xaa }, |
370 | { 0x0212, 0xab }, |
371 | { 0x0213, 0x02 }, |
372 | { 0x0502, 0x00 }, |
373 | { 0x0121, 0x04 }, |
374 | { 0x0122, 0x04 }, |
375 | { 0x052e, 0x10 }, |
376 | { 0x00a4, 0xca }, |
377 | { 0x00a7, 0x40 }, |
378 | { 0x0526, 0x01 }, |
379 | }; |
380 | |
381 | /* QAM256 Modulation table */ |
382 | static struct { |
383 | u16 reg; |
384 | u16 data; |
385 | } QAM256_mod_tab[] = { |
386 | { 0x00a3, 0x09 }, |
387 | { 0x00a4, 0x00 }, |
388 | { 0x0081, 0xc4 }, |
389 | { 0x00a5, 0x40 }, |
390 | { 0x00aa, 0x77 }, |
391 | { 0x00ad, 0x77 }, |
392 | { 0x00a6, 0x67 }, |
393 | { 0x0262, 0x20 }, |
394 | { 0x021c, 0x30 }, |
395 | { 0x00b8, 0x3e }, |
396 | { 0x00b9, 0xf0 }, |
397 | { 0x00ba, 0x01 }, |
398 | { 0x00bb, 0x18 }, |
399 | { 0x00bc, 0x50 }, |
400 | { 0x00bd, 0x00 }, |
401 | { 0x00be, 0xea }, |
402 | { 0x00bf, 0xef }, |
403 | { 0x00c0, 0xfc }, |
404 | { 0x00c1, 0xbd }, |
405 | { 0x00c2, 0x1f }, |
406 | { 0x00c3, 0xfc }, |
407 | { 0x00c4, 0xdd }, |
408 | { 0x00c5, 0xaf }, |
409 | { 0x00c6, 0x00 }, |
410 | { 0x00c7, 0x38 }, |
411 | { 0x00c8, 0x30 }, |
412 | { 0x00c9, 0x05 }, |
413 | { 0x00ca, 0x4a }, |
414 | { 0x00cb, 0xd0 }, |
415 | { 0x00cc, 0x01 }, |
416 | { 0x00cd, 0xd9 }, |
417 | { 0x00ce, 0x6f }, |
418 | { 0x00cf, 0xf9 }, |
419 | { 0x00d0, 0x70 }, |
420 | { 0x00d1, 0xdf }, |
421 | { 0x00d2, 0xf7 }, |
422 | { 0x00d3, 0xc2 }, |
423 | { 0x00d4, 0xdf }, |
424 | { 0x00d5, 0x02 }, |
425 | { 0x00d6, 0x9a }, |
426 | { 0x00d7, 0xd0 }, |
427 | { 0x0250, 0x0d }, |
428 | { 0x0251, 0xcd }, |
429 | { 0x0252, 0xe0 }, |
430 | { 0x0253, 0x05 }, |
431 | { 0x0254, 0xa7 }, |
432 | { 0x0255, 0xff }, |
433 | { 0x0256, 0xed }, |
434 | { 0x0257, 0x5b }, |
435 | { 0x0258, 0xae }, |
436 | { 0x0259, 0xe6 }, |
437 | { 0x025a, 0x3d }, |
438 | { 0x025b, 0x0f }, |
439 | { 0x025c, 0x0d }, |
440 | { 0x025d, 0xea }, |
441 | { 0x025e, 0xf2 }, |
442 | { 0x025f, 0x51 }, |
443 | { 0x0260, 0xf5 }, |
444 | { 0x0261, 0x06 }, |
445 | { 0x021a, 0x00 }, |
446 | { 0x0546, 0x40 }, |
447 | { 0x0210, 0x26 }, |
448 | { 0x0211, 0xf6 }, |
449 | { 0x0212, 0x84 }, |
450 | { 0x0213, 0x02 }, |
451 | { 0x0502, 0x01 }, |
452 | { 0x0121, 0x04 }, |
453 | { 0x0122, 0x04 }, |
454 | { 0x052e, 0x10 }, |
455 | { 0x00a4, 0xca }, |
456 | { 0x00a7, 0x40 }, |
457 | { 0x0526, 0x01 }, |
458 | }; |
459 | |
460 | static struct { |
461 | u16 reg; |
462 | u16 data; |
463 | } QAM256_mod_tab_zv_mode[] = { |
464 | { 0x80a3, 0x09 }, |
465 | { 0x80a4, 0x00 }, |
466 | { 0x8081, 0xc4 }, |
467 | { 0x80a5, 0x40 }, |
468 | { 0x80b5, 0xfb }, |
469 | { 0x80b6, 0x8e }, |
470 | { 0x80b7, 0x39 }, |
471 | { 0x80aa, 0x77 }, |
472 | { 0x80ad, 0x77 }, |
473 | { 0x80a6, 0x67 }, |
474 | { 0x8262, 0x20 }, |
475 | { 0x821c, 0x30 }, |
476 | { 0x80b8, 0x3e }, |
477 | { 0x80b9, 0xf0 }, |
478 | { 0x80ba, 0x01 }, |
479 | { 0x80bb, 0x18 }, |
480 | { 0x80bc, 0x50 }, |
481 | { 0x80bd, 0x00 }, |
482 | { 0x80be, 0xea }, |
483 | { 0x80bf, 0xef }, |
484 | { 0x80c0, 0xfc }, |
485 | { 0x80c1, 0xbd }, |
486 | { 0x80c2, 0x1f }, |
487 | { 0x80c3, 0xfc }, |
488 | { 0x80c4, 0xdd }, |
489 | { 0x80c5, 0xaf }, |
490 | { 0x80c6, 0x00 }, |
491 | { 0x80c7, 0x38 }, |
492 | { 0x80c8, 0x30 }, |
493 | { 0x80c9, 0x05 }, |
494 | { 0x80ca, 0x4a }, |
495 | { 0x80cb, 0xd0 }, |
496 | { 0x80cc, 0x01 }, |
497 | { 0x80cd, 0xd9 }, |
498 | { 0x80ce, 0x6f }, |
499 | { 0x80cf, 0xf9 }, |
500 | { 0x80d0, 0x70 }, |
501 | { 0x80d1, 0xdf }, |
502 | { 0x80d2, 0xf7 }, |
503 | { 0x80d3, 0xc2 }, |
504 | { 0x80d4, 0xdf }, |
505 | { 0x80d5, 0x02 }, |
506 | { 0x80d6, 0x9a }, |
507 | { 0x80d7, 0xd0 }, |
508 | { 0x8250, 0x0d }, |
509 | { 0x8251, 0xcd }, |
510 | { 0x8252, 0xe0 }, |
511 | { 0x8253, 0x05 }, |
512 | { 0x8254, 0xa7 }, |
513 | { 0x8255, 0xff }, |
514 | { 0x8256, 0xed }, |
515 | { 0x8257, 0x5b }, |
516 | { 0x8258, 0xae }, |
517 | { 0x8259, 0xe6 }, |
518 | { 0x825a, 0x3d }, |
519 | { 0x825b, 0x0f }, |
520 | { 0x825c, 0x0d }, |
521 | { 0x825d, 0xea }, |
522 | { 0x825e, 0xf2 }, |
523 | { 0x825f, 0x51 }, |
524 | { 0x8260, 0xf5 }, |
525 | { 0x8261, 0x06 }, |
526 | { 0x821a, 0x01 }, |
527 | { 0x8546, 0x40 }, |
528 | { 0x8210, 0x26 }, |
529 | { 0x8211, 0xf6 }, |
530 | { 0x8212, 0x84 }, |
531 | { 0x8213, 0x02 }, |
532 | { 0x8502, 0x01 }, |
533 | { 0x8121, 0x04 }, |
534 | { 0x8122, 0x04 }, |
535 | { 0x852e, 0x10 }, |
536 | { 0x80a4, 0xca }, |
537 | { 0x80a7, 0x40 }, |
538 | { 0x8526, 0x01 }, |
539 | }; |
540 | |
541 | static int au8522_enable_modulation(struct dvb_frontend *fe, |
542 | enum fe_modulation m) |
543 | { |
544 | struct au8522_state *state = fe->demodulator_priv; |
545 | int i; |
546 | |
547 | dprintk("%s(0x%08x)\n" , __func__, m); |
548 | |
549 | switch (m) { |
550 | case VSB_8: |
551 | dprintk("%s() VSB_8\n" , __func__); |
552 | for (i = 0; i < ARRAY_SIZE(VSB_mod_tab); i++) |
553 | au8522_writereg(state, |
554 | reg: VSB_mod_tab[i].reg, |
555 | data: VSB_mod_tab[i].data); |
556 | au8522_set_if(fe, if_freq: state->config.vsb_if); |
557 | break; |
558 | case QAM_64: |
559 | dprintk("%s() QAM 64\n" , __func__); |
560 | for (i = 0; i < ARRAY_SIZE(QAM64_mod_tab); i++) |
561 | au8522_writereg(state, |
562 | reg: QAM64_mod_tab[i].reg, |
563 | data: QAM64_mod_tab[i].data); |
564 | au8522_set_if(fe, if_freq: state->config.qam_if); |
565 | break; |
566 | case QAM_256: |
567 | if (zv_mode) { |
568 | dprintk("%s() QAM 256 (zv_mode)\n" , __func__); |
569 | for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab_zv_mode); i++) |
570 | au8522_writereg(state, |
571 | reg: QAM256_mod_tab_zv_mode[i].reg, |
572 | data: QAM256_mod_tab_zv_mode[i].data); |
573 | au8522_set_if(fe, if_freq: state->config.qam_if); |
574 | msleep(msecs: 100); |
575 | au8522_writereg(state, reg: 0x821a, data: 0x00); |
576 | } else { |
577 | dprintk("%s() QAM 256\n" , __func__); |
578 | for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab); i++) |
579 | au8522_writereg(state, |
580 | reg: QAM256_mod_tab[i].reg, |
581 | data: QAM256_mod_tab[i].data); |
582 | au8522_set_if(fe, if_freq: state->config.qam_if); |
583 | } |
584 | break; |
585 | default: |
586 | dprintk("%s() Invalid modulation\n" , __func__); |
587 | return -EINVAL; |
588 | } |
589 | |
590 | state->current_modulation = m; |
591 | |
592 | return 0; |
593 | } |
594 | |
595 | /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ |
596 | static int au8522_set_frontend(struct dvb_frontend *fe) |
597 | { |
598 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
599 | struct au8522_state *state = fe->demodulator_priv; |
600 | int ret = -EINVAL; |
601 | |
602 | dprintk("%s(frequency=%d)\n" , __func__, c->frequency); |
603 | |
604 | if ((state->current_frequency == c->frequency) && |
605 | (state->current_modulation == c->modulation)) |
606 | return 0; |
607 | |
608 | if (fe->ops.tuner_ops.set_params) { |
609 | if (fe->ops.i2c_gate_ctrl) |
610 | fe->ops.i2c_gate_ctrl(fe, 1); |
611 | ret = fe->ops.tuner_ops.set_params(fe); |
612 | if (fe->ops.i2c_gate_ctrl) |
613 | fe->ops.i2c_gate_ctrl(fe, 0); |
614 | } |
615 | |
616 | if (ret < 0) |
617 | return ret; |
618 | |
619 | /* Allow the tuner to settle */ |
620 | if (zv_mode) { |
621 | dprintk("%s() increase tuner settling time for zv_mode\n" , |
622 | __func__); |
623 | msleep(msecs: 250); |
624 | } else |
625 | msleep(msecs: 100); |
626 | |
627 | au8522_enable_modulation(fe, m: c->modulation); |
628 | |
629 | state->current_frequency = c->frequency; |
630 | |
631 | return 0; |
632 | } |
633 | |
634 | static int au8522_read_status(struct dvb_frontend *fe, enum fe_status *status) |
635 | { |
636 | struct au8522_state *state = fe->demodulator_priv; |
637 | u8 reg; |
638 | u32 tuner_status = 0; |
639 | |
640 | *status = 0; |
641 | |
642 | if (state->current_modulation == VSB_8) { |
643 | dprintk("%s() Checking VSB_8\n" , __func__); |
644 | reg = au8522_readreg(state, reg: 0x0088); |
645 | if ((reg & 0x03) == 0x03) |
646 | *status |= FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI; |
647 | } else { |
648 | dprintk("%s() Checking QAM\n" , __func__); |
649 | reg = au8522_readreg(state, reg: 0x0541); |
650 | if (reg & 0x80) |
651 | *status |= FE_HAS_VITERBI; |
652 | if (reg & 0x20) |
653 | *status |= FE_HAS_LOCK | FE_HAS_SYNC; |
654 | } |
655 | |
656 | switch (state->config.status_mode) { |
657 | case AU8522_DEMODLOCKING: |
658 | dprintk("%s() DEMODLOCKING\n" , __func__); |
659 | if (*status & FE_HAS_VITERBI) |
660 | *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; |
661 | break; |
662 | case AU8522_TUNERLOCKING: |
663 | /* Get the tuner status */ |
664 | dprintk("%s() TUNERLOCKING\n" , __func__); |
665 | if (fe->ops.tuner_ops.get_status) { |
666 | if (fe->ops.i2c_gate_ctrl) |
667 | fe->ops.i2c_gate_ctrl(fe, 1); |
668 | |
669 | fe->ops.tuner_ops.get_status(fe, &tuner_status); |
670 | |
671 | if (fe->ops.i2c_gate_ctrl) |
672 | fe->ops.i2c_gate_ctrl(fe, 0); |
673 | } |
674 | if (tuner_status) |
675 | *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; |
676 | break; |
677 | } |
678 | state->fe_status = *status; |
679 | |
680 | if (*status & FE_HAS_LOCK) |
681 | /* turn on LED, if it isn't on already */ |
682 | au8522_led_ctrl(state, led: -1); |
683 | else |
684 | /* turn off LED */ |
685 | au8522_led_ctrl(state, led: 0); |
686 | |
687 | dprintk("%s() status 0x%08x\n" , __func__, *status); |
688 | |
689 | return 0; |
690 | } |
691 | |
692 | static int au8522_led_status(struct au8522_state *state, const u16 *snr) |
693 | { |
694 | struct au8522_led_config *led_config = state->config.led_cfg; |
695 | int led; |
696 | u16 strong; |
697 | |
698 | /* bail out if we can't control an LED */ |
699 | if (!led_config) |
700 | return 0; |
701 | |
702 | if (0 == (state->fe_status & FE_HAS_LOCK)) |
703 | return au8522_led_ctrl(state, led: 0); |
704 | else if (state->current_modulation == QAM_256) |
705 | strong = led_config->qam256_strong; |
706 | else if (state->current_modulation == QAM_64) |
707 | strong = led_config->qam64_strong; |
708 | else /* (state->current_modulation == VSB_8) */ |
709 | strong = led_config->vsb8_strong; |
710 | |
711 | if (*snr >= strong) |
712 | led = 2; |
713 | else |
714 | led = 1; |
715 | |
716 | if ((state->led_state) && |
717 | (((strong < *snr) ? (*snr - strong) : (strong - *snr)) <= 10)) |
718 | /* snr didn't change enough to bother |
719 | * changing the color of the led */ |
720 | return 0; |
721 | |
722 | return au8522_led_ctrl(state, led); |
723 | } |
724 | |
725 | static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr) |
726 | { |
727 | struct au8522_state *state = fe->demodulator_priv; |
728 | int ret = -EINVAL; |
729 | |
730 | dprintk("%s()\n" , __func__); |
731 | |
732 | if (state->current_modulation == QAM_256) |
733 | ret = au8522_mse2snr_lookup(tab: qam256_mse2snr_tab, |
734 | ARRAY_SIZE(qam256_mse2snr_tab), |
735 | mse: au8522_readreg(state, reg: 0x0522), |
736 | snr); |
737 | else if (state->current_modulation == QAM_64) |
738 | ret = au8522_mse2snr_lookup(tab: qam64_mse2snr_tab, |
739 | ARRAY_SIZE(qam64_mse2snr_tab), |
740 | mse: au8522_readreg(state, reg: 0x0522), |
741 | snr); |
742 | else /* VSB_8 */ |
743 | ret = au8522_mse2snr_lookup(tab: vsb_mse2snr_tab, |
744 | ARRAY_SIZE(vsb_mse2snr_tab), |
745 | mse: au8522_readreg(state, reg: 0x0311), |
746 | snr); |
747 | |
748 | if (state->config.led_cfg) |
749 | au8522_led_status(state, snr); |
750 | |
751 | return ret; |
752 | } |
753 | |
754 | static int au8522_read_signal_strength(struct dvb_frontend *fe, |
755 | u16 *signal_strength) |
756 | { |
757 | /* borrowed from lgdt330x.c |
758 | * |
759 | * Calculate strength from SNR up to 35dB |
760 | * Even though the SNR can go higher than 35dB, |
761 | * there is some comfort factor in having a range of |
762 | * strong signals that can show at 100% |
763 | */ |
764 | u16 snr; |
765 | u32 tmp; |
766 | int ret = au8522_read_snr(fe, snr: &snr); |
767 | |
768 | *signal_strength = 0; |
769 | |
770 | if (0 == ret) { |
771 | /* The following calculation method was chosen |
772 | * purely for the sake of code re-use from the |
773 | * other demod drivers that use this method */ |
774 | |
775 | /* Convert from SNR in dB * 10 to 8.24 fixed-point */ |
776 | tmp = (snr * ((1 << 24) / 10)); |
777 | |
778 | /* Convert from 8.24 fixed-point to |
779 | * scale the range 0 - 35*2^24 into 0 - 65535*/ |
780 | if (tmp >= 8960 * 0x10000) |
781 | *signal_strength = 0xffff; |
782 | else |
783 | *signal_strength = tmp / 8960; |
784 | } |
785 | |
786 | return ret; |
787 | } |
788 | |
789 | static int au8522_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) |
790 | { |
791 | struct au8522_state *state = fe->demodulator_priv; |
792 | |
793 | if (state->current_modulation == VSB_8) |
794 | *ucblocks = au8522_readreg(state, reg: 0x0087); |
795 | else |
796 | *ucblocks = au8522_readreg(state, reg: 0x0543); |
797 | |
798 | return 0; |
799 | } |
800 | |
801 | static int au8522_read_ber(struct dvb_frontend *fe, u32 *ber) |
802 | { |
803 | return au8522_read_ucblocks(fe, ucblocks: ber); |
804 | } |
805 | |
806 | static int au8522_get_frontend(struct dvb_frontend *fe, |
807 | struct dtv_frontend_properties *c) |
808 | { |
809 | struct au8522_state *state = fe->demodulator_priv; |
810 | |
811 | c->frequency = state->current_frequency; |
812 | c->modulation = state->current_modulation; |
813 | |
814 | return 0; |
815 | } |
816 | |
817 | static int au8522_get_tune_settings(struct dvb_frontend *fe, |
818 | struct dvb_frontend_tune_settings *tune) |
819 | { |
820 | tune->min_delay_ms = 1000; |
821 | return 0; |
822 | } |
823 | |
824 | static const struct dvb_frontend_ops au8522_ops; |
825 | |
826 | |
827 | static void au8522_release(struct dvb_frontend *fe) |
828 | { |
829 | struct au8522_state *state = fe->demodulator_priv; |
830 | au8522_release_state(state); |
831 | } |
832 | |
833 | struct dvb_frontend *au8522_attach(const struct au8522_config *config, |
834 | struct i2c_adapter *i2c) |
835 | { |
836 | struct au8522_state *state = NULL; |
837 | int instance; |
838 | |
839 | /* allocate memory for the internal state */ |
840 | instance = au8522_get_state(state: &state, i2c, client_address: config->demod_address); |
841 | switch (instance) { |
842 | case 0: |
843 | dprintk("%s state allocation failed\n" , __func__); |
844 | break; |
845 | case 1: |
846 | /* new demod instance */ |
847 | dprintk("%s using new instance\n" , __func__); |
848 | break; |
849 | default: |
850 | /* existing demod instance */ |
851 | dprintk("%s using existing instance\n" , __func__); |
852 | break; |
853 | } |
854 | |
855 | /* setup the state */ |
856 | state->config = *config; |
857 | state->i2c = i2c; |
858 | state->operational_mode = AU8522_DIGITAL_MODE; |
859 | |
860 | /* create dvb_frontend */ |
861 | memcpy(&state->frontend.ops, &au8522_ops, |
862 | sizeof(struct dvb_frontend_ops)); |
863 | state->frontend.demodulator_priv = state; |
864 | |
865 | state->frontend.ops.analog_ops.i2c_gate_ctrl = au8522_analog_i2c_gate_ctrl; |
866 | |
867 | if (au8522_init(fe: &state->frontend) != 0) { |
868 | printk(KERN_ERR "%s: Failed to initialize correctly\n" , |
869 | __func__); |
870 | goto error; |
871 | } |
872 | |
873 | /* Note: Leaving the I2C gate open here. */ |
874 | au8522_i2c_gate_ctrl(fe: &state->frontend, enable: 1); |
875 | |
876 | return &state->frontend; |
877 | |
878 | error: |
879 | au8522_release_state(state); |
880 | return NULL; |
881 | } |
882 | EXPORT_SYMBOL_GPL(au8522_attach); |
883 | |
884 | static const struct dvb_frontend_ops au8522_ops = { |
885 | .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, |
886 | .info = { |
887 | .name = "Auvitek AU8522 QAM/8VSB Frontend" , |
888 | .frequency_min_hz = 54 * MHz, |
889 | .frequency_max_hz = 858 * MHz, |
890 | .frequency_stepsize_hz = 62500, |
891 | .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB |
892 | }, |
893 | |
894 | .init = au8522_init, |
895 | .sleep = au8522_sleep, |
896 | .i2c_gate_ctrl = au8522_i2c_gate_ctrl, |
897 | .set_frontend = au8522_set_frontend, |
898 | .get_frontend = au8522_get_frontend, |
899 | .get_tune_settings = au8522_get_tune_settings, |
900 | .read_status = au8522_read_status, |
901 | .read_ber = au8522_read_ber, |
902 | .read_signal_strength = au8522_read_signal_strength, |
903 | .read_snr = au8522_read_snr, |
904 | .read_ucblocks = au8522_read_ucblocks, |
905 | .release = au8522_release, |
906 | }; |
907 | |
908 | module_param(debug, int, 0644); |
909 | MODULE_PARM_DESC(debug, "Enable verbose debug messages" ); |
910 | |
911 | module_param(zv_mode, int, 0644); |
912 | MODULE_PARM_DESC(zv_mode, "Turn on/off ZeeVee modulator compatibility mode (default:on).\n" |
913 | "\t\ton - modified AU8522 QAM256 initialization.\n" |
914 | "\t\tProvides faster lock when using ZeeVee modulator based sources" ); |
915 | |
916 | MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver" ); |
917 | MODULE_AUTHOR("Steven Toth" ); |
918 | MODULE_LICENSE("GPL" ); |
919 | |