Commit | Line | Data |
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265a6510 ST |
1 | /* |
2 | Auvitek AU8522 QAM/8VSB demodulator driver | |
3 | ||
4 | Copyright (C) 2008 Steven Toth <stoth@hauppauge.com> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
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 | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/delay.h> | |
28 | #include "dvb_frontend.h" | |
29 | #include "dvb-pll.h" | |
30 | #include "au8522.h" | |
31 | ||
32 | struct au8522_state { | |
33 | ||
e059b0fa | 34 | struct i2c_adapter *i2c; |
265a6510 ST |
35 | |
36 | /* configuration settings */ | |
e059b0fa | 37 | const struct au8522_config *config; |
265a6510 ST |
38 | |
39 | struct dvb_frontend frontend; | |
40 | ||
41 | u32 current_frequency; | |
42 | fe_modulation_t current_modulation; | |
43 | ||
44 | }; | |
45 | ||
46 | static int debug = 0; | |
47 | #define dprintk if (debug) printk | |
48 | ||
49 | /* 16 bit registers, 8 bit values */ | |
e059b0fa | 50 | static int au8522_writereg(struct au8522_state *state, u16 reg, u8 data) |
265a6510 ST |
51 | { |
52 | int ret; | |
53 | u8 buf [] = { reg >> 8, reg & 0xff, data }; | |
54 | ||
55 | struct i2c_msg msg = { .addr = state->config->demod_address, | |
56 | .flags = 0, .buf = buf, .len = 3 }; | |
57 | ||
58 | ret = i2c_transfer(state->i2c, &msg, 1); | |
59 | ||
60 | if (ret != 1) | |
61 | printk("%s: writereg error (reg == 0x%02x, val == 0x%04x, " | |
ce1719a6 | 62 | "ret == %i)\n", __func__, reg, data, ret); |
265a6510 ST |
63 | |
64 | return (ret != 1) ? -1 : 0; | |
65 | } | |
66 | ||
e059b0fa | 67 | static u8 au8522_readreg(struct au8522_state *state, u16 reg) |
265a6510 ST |
68 | { |
69 | int ret; | |
70 | u8 b0 [] = { reg >> 8, reg & 0xff }; | |
71 | u8 b1 [] = { 0 }; | |
72 | ||
73 | struct i2c_msg msg [] = { | |
74 | { .addr = state->config->demod_address, .flags = 0, | |
75 | .buf = b0, .len = 2 }, | |
76 | { .addr = state->config->demod_address, .flags = I2C_M_RD, | |
77 | .buf = b1, .len = 1 } }; | |
78 | ||
79 | ret = i2c_transfer(state->i2c, msg, 2); | |
80 | ||
81 | if (ret != 2) | |
ce1719a6 MK |
82 | printk(KERN_ERR "%s: readreg error (ret == %i)\n", |
83 | __func__, ret); | |
265a6510 ST |
84 | return b1[0]; |
85 | } | |
86 | ||
e059b0fa | 87 | static int au8522_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) |
265a6510 | 88 | { |
e059b0fa | 89 | struct au8522_state *state = fe->demodulator_priv; |
265a6510 | 90 | |
ce1719a6 | 91 | dprintk("%s(%d)\n", __func__, enable); |
265a6510 ST |
92 | |
93 | if (enable) | |
94 | return au8522_writereg(state, 0x106, 1); | |
95 | else | |
96 | return au8522_writereg(state, 0x106, 0); | |
97 | } | |
98 | ||
0daa5de7 | 99 | struct mse2snr_tab { |
f01699b4 ST |
100 | u16 val; |
101 | u16 data; | |
0daa5de7 MK |
102 | }; |
103 | ||
104 | /* VSB SNR lookup table */ | |
105 | static struct mse2snr_tab vsb_mse2snr_tab[] = { | |
f01699b4 ST |
106 | { 0, 270 }, |
107 | { 2, 250 }, | |
108 | { 3, 240 }, | |
109 | { 5, 230 }, | |
110 | { 7, 220 }, | |
111 | { 9, 210 }, | |
112 | { 12, 200 }, | |
113 | { 13, 195 }, | |
114 | { 15, 190 }, | |
115 | { 17, 185 }, | |
116 | { 19, 180 }, | |
117 | { 21, 175 }, | |
118 | { 24, 170 }, | |
119 | { 27, 165 }, | |
120 | { 31, 160 }, | |
121 | { 32, 158 }, | |
122 | { 33, 156 }, | |
123 | { 36, 152 }, | |
124 | { 37, 150 }, | |
125 | { 39, 148 }, | |
126 | { 40, 146 }, | |
127 | { 41, 144 }, | |
128 | { 43, 142 }, | |
129 | { 44, 140 }, | |
130 | { 48, 135 }, | |
131 | { 50, 130 }, | |
132 | { 43, 142 }, | |
133 | { 53, 125 }, | |
134 | { 56, 120 }, | |
135 | { 256, 115 }, | |
136 | }; | |
137 | ||
138 | /* QAM64 SNR lookup table */ | |
0daa5de7 | 139 | static struct mse2snr_tab qam64_mse2snr_tab[] = { |
f01699b4 ST |
140 | { 15, 0 }, |
141 | { 16, 290 }, | |
142 | { 17, 288 }, | |
143 | { 18, 286 }, | |
144 | { 19, 284 }, | |
145 | { 20, 282 }, | |
146 | { 21, 281 }, | |
147 | { 22, 279 }, | |
148 | { 23, 277 }, | |
149 | { 24, 275 }, | |
150 | { 25, 273 }, | |
151 | { 26, 271 }, | |
152 | { 27, 269 }, | |
153 | { 28, 268 }, | |
154 | { 29, 266 }, | |
155 | { 30, 264 }, | |
156 | { 31, 262 }, | |
157 | { 32, 260 }, | |
158 | { 33, 259 }, | |
159 | { 34, 258 }, | |
160 | { 35, 256 }, | |
161 | { 36, 255 }, | |
162 | { 37, 254 }, | |
163 | { 38, 252 }, | |
164 | { 39, 251 }, | |
165 | { 40, 250 }, | |
166 | { 41, 249 }, | |
167 | { 42, 248 }, | |
168 | { 43, 246 }, | |
169 | { 44, 245 }, | |
170 | { 45, 244 }, | |
171 | { 46, 242 }, | |
172 | { 47, 241 }, | |
173 | { 48, 240 }, | |
174 | { 50, 239 }, | |
175 | { 51, 238 }, | |
176 | { 53, 237 }, | |
177 | { 54, 236 }, | |
178 | { 56, 235 }, | |
179 | { 57, 234 }, | |
180 | { 59, 233 }, | |
181 | { 60, 232 }, | |
182 | { 62, 231 }, | |
183 | { 63, 230 }, | |
184 | { 65, 229 }, | |
185 | { 67, 228 }, | |
186 | { 68, 227 }, | |
187 | { 70, 226 }, | |
188 | { 71, 225 }, | |
189 | { 73, 224 }, | |
190 | { 74, 223 }, | |
191 | { 76, 222 }, | |
192 | { 78, 221 }, | |
193 | { 80, 220 }, | |
194 | { 82, 219 }, | |
195 | { 85, 218 }, | |
196 | { 88, 217 }, | |
197 | { 90, 216 }, | |
198 | { 92, 215 }, | |
199 | { 93, 214 }, | |
200 | { 94, 212 }, | |
201 | { 95, 211 }, | |
202 | { 97, 210 }, | |
203 | { 99, 209 }, | |
204 | { 101, 208 }, | |
205 | { 102, 207 }, | |
206 | { 104, 206 }, | |
207 | { 107, 205 }, | |
208 | { 111, 204 }, | |
209 | { 114, 203 }, | |
210 | { 118, 202 }, | |
211 | { 122, 201 }, | |
212 | { 125, 200 }, | |
213 | { 128, 199 }, | |
214 | { 130, 198 }, | |
215 | { 132, 197 }, | |
216 | { 256, 190 }, | |
217 | }; | |
218 | ||
219 | /* QAM256 SNR lookup table */ | |
0daa5de7 | 220 | static struct mse2snr_tab qam256_mse2snr_tab[] = { |
f01699b4 ST |
221 | { 16, 0 }, |
222 | { 17, 400 }, | |
223 | { 18, 398 }, | |
224 | { 19, 396 }, | |
225 | { 20, 394 }, | |
226 | { 21, 392 }, | |
227 | { 22, 390 }, | |
228 | { 23, 388 }, | |
229 | { 24, 386 }, | |
230 | { 25, 384 }, | |
231 | { 26, 382 }, | |
232 | { 27, 380 }, | |
233 | { 28, 379 }, | |
234 | { 29, 378 }, | |
235 | { 30, 377 }, | |
236 | { 31, 376 }, | |
237 | { 32, 375 }, | |
238 | { 33, 374 }, | |
239 | { 34, 373 }, | |
240 | { 35, 372 }, | |
241 | { 36, 371 }, | |
242 | { 37, 370 }, | |
243 | { 38, 362 }, | |
244 | { 39, 354 }, | |
245 | { 40, 346 }, | |
246 | { 41, 338 }, | |
247 | { 42, 330 }, | |
248 | { 43, 328 }, | |
249 | { 44, 326 }, | |
250 | { 45, 324 }, | |
251 | { 46, 322 }, | |
252 | { 47, 320 }, | |
253 | { 48, 319 }, | |
254 | { 49, 318 }, | |
255 | { 50, 317 }, | |
256 | { 51, 316 }, | |
257 | { 52, 315 }, | |
258 | { 53, 314 }, | |
259 | { 54, 313 }, | |
260 | { 55, 312 }, | |
261 | { 56, 311 }, | |
262 | { 57, 310 }, | |
263 | { 58, 308 }, | |
264 | { 59, 306 }, | |
265 | { 60, 304 }, | |
266 | { 61, 302 }, | |
267 | { 62, 300 }, | |
268 | { 63, 298 }, | |
269 | { 65, 295 }, | |
270 | { 68, 294 }, | |
271 | { 70, 293 }, | |
272 | { 73, 292 }, | |
273 | { 76, 291 }, | |
274 | { 78, 290 }, | |
275 | { 79, 289 }, | |
276 | { 81, 288 }, | |
277 | { 82, 287 }, | |
278 | { 83, 286 }, | |
279 | { 84, 285 }, | |
280 | { 85, 284 }, | |
281 | { 86, 283 }, | |
282 | { 88, 282 }, | |
283 | { 89, 281 }, | |
284 | { 256, 280 }, | |
285 | }; | |
286 | ||
0daa5de7 | 287 | static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse, u16 *snr) |
f01699b4 ST |
288 | { |
289 | int i, ret = -EINVAL; | |
290 | dprintk("%s()\n", __func__); | |
291 | ||
0daa5de7 MK |
292 | for (i = 0; i < sz; i++) { |
293 | if (mse < tab[i].val) { | |
294 | *snr = tab[i].data; | |
f01699b4 ST |
295 | ret = 0; |
296 | break; | |
297 | } | |
298 | } | |
299 | dprintk("%s() snr=%d\n", __func__, *snr); | |
300 | return ret; | |
301 | } | |
302 | ||
303 | /* VSB Modulation table */ | |
304 | static struct { | |
305 | u16 reg; | |
306 | u16 data; | |
307 | } VSB_mod_tab[] = { | |
308 | { 0x8090, 0x84 }, | |
309 | { 0x4092, 0x11 }, | |
310 | { 0x2005, 0x00 }, | |
311 | { 0x8091, 0x80 }, | |
312 | { 0x80a3, 0x0c }, | |
313 | { 0x80a4, 0xe8 }, | |
314 | { 0x8081, 0xc4 }, | |
315 | { 0x80a5, 0x40 }, | |
316 | { 0x80a7, 0x40 }, | |
317 | { 0x80a6, 0x67 }, | |
318 | { 0x8262, 0x20 }, | |
319 | { 0x821c, 0x30 }, | |
320 | { 0x80d8, 0x1a }, | |
321 | { 0x8227, 0xa0 }, | |
322 | { 0x8121, 0xff }, | |
323 | { 0x80a8, 0xf0 }, | |
324 | { 0x80a9, 0x05 }, | |
325 | { 0x80aa, 0x77 }, | |
326 | { 0x80ab, 0xf0 }, | |
327 | { 0x80ac, 0x05 }, | |
328 | { 0x80ad, 0x77 }, | |
329 | { 0x80ae, 0x41 }, | |
330 | { 0x80af, 0x66 }, | |
331 | { 0x821b, 0xcc }, | |
332 | { 0x821d, 0x80 }, | |
333 | { 0x80b5, 0xfb }, | |
334 | { 0x80b6, 0x8e }, | |
335 | { 0x80b7, 0x39 }, | |
336 | { 0x80a4, 0xe8 }, | |
337 | { 0x8231, 0x13 }, | |
338 | }; | |
339 | ||
340 | /* QAM Modulation table */ | |
341 | static struct { | |
342 | u16 reg; | |
343 | u16 data; | |
344 | } QAM_mod_tab[] = { | |
345 | { 0x80a3, 0x09 }, | |
346 | { 0x80a4, 0x00 }, | |
347 | { 0x8081, 0xc4 }, | |
348 | { 0x80a5, 0x40 }, | |
349 | { 0x80b5, 0xfb }, | |
350 | { 0x80b6, 0x8e }, | |
351 | { 0x80b7, 0x39 }, | |
352 | { 0x80aa, 0x77 }, | |
353 | { 0x80ad, 0x77 }, | |
354 | { 0x80a6, 0x67 }, | |
355 | { 0x8262, 0x20 }, | |
356 | { 0x821c, 0x30 }, | |
357 | { 0x80b8, 0x3e }, | |
358 | { 0x80b9, 0xf0 }, | |
359 | { 0x80ba, 0x01 }, | |
360 | { 0x80bb, 0x18 }, | |
361 | { 0x80bc, 0x50 }, | |
362 | { 0x80bd, 0x00 }, | |
363 | { 0x80be, 0xea }, | |
364 | { 0x80bf, 0xef }, | |
365 | { 0x80c0, 0xfc }, | |
366 | { 0x80c1, 0xbd }, | |
367 | { 0x80c2, 0x1f }, | |
368 | { 0x80c3, 0xfc }, | |
369 | { 0x80c4, 0xdd }, | |
370 | { 0x80c5, 0xaf }, | |
371 | { 0x80c6, 0x00 }, | |
372 | { 0x80c7, 0x38 }, | |
373 | { 0x80c8, 0x30 }, | |
374 | { 0x80c9, 0x05 }, | |
375 | { 0x80ca, 0x4a }, | |
376 | { 0x80cb, 0xd0 }, | |
377 | { 0x80cc, 0x01 }, | |
378 | { 0x80cd, 0xd9 }, | |
379 | { 0x80ce, 0x6f }, | |
380 | { 0x80cf, 0xf9 }, | |
381 | { 0x80d0, 0x70 }, | |
382 | { 0x80d1, 0xdf }, | |
383 | { 0x80d2, 0xf7 }, | |
384 | { 0x80d3, 0xc2 }, | |
385 | { 0x80d4, 0xdf }, | |
386 | { 0x80d5, 0x02 }, | |
387 | { 0x80d6, 0x9a }, | |
388 | { 0x80d7, 0xd0 }, | |
389 | { 0x8250, 0x0d }, | |
390 | { 0x8251, 0xcd }, | |
391 | { 0x8252, 0xe0 }, | |
392 | { 0x8253, 0x05 }, | |
393 | { 0x8254, 0xa7 }, | |
394 | { 0x8255, 0xff }, | |
395 | { 0x8256, 0xed }, | |
396 | { 0x8257, 0x5b }, | |
397 | { 0x8258, 0xae }, | |
398 | { 0x8259, 0xe6 }, | |
399 | { 0x825a, 0x3d }, | |
400 | { 0x825b, 0x0f }, | |
401 | { 0x825c, 0x0d }, | |
402 | { 0x825d, 0xea }, | |
403 | { 0x825e, 0xf2 }, | |
404 | { 0x825f, 0x51 }, | |
405 | { 0x8260, 0xf5 }, | |
406 | { 0x8261, 0x06 }, | |
407 | { 0x821a, 0x00 }, | |
408 | { 0x8546, 0x40 }, | |
409 | { 0x8210, 0x26 }, | |
410 | { 0x8211, 0xf6 }, | |
411 | { 0x8212, 0x84 }, | |
412 | { 0x8213, 0x02 }, | |
413 | { 0x8502, 0x01 }, | |
414 | { 0x8121, 0x04 }, | |
415 | { 0x8122, 0x04 }, | |
416 | { 0x852e, 0x10 }, | |
417 | { 0x80a4, 0xca }, | |
418 | { 0x80a7, 0x40 }, | |
419 | { 0x8526, 0x01 }, | |
420 | }; | |
421 | ||
e059b0fa MK |
422 | static int au8522_enable_modulation(struct dvb_frontend *fe, |
423 | fe_modulation_t m) | |
265a6510 | 424 | { |
e059b0fa | 425 | struct au8522_state *state = fe->demodulator_priv; |
f01699b4 | 426 | int i; |
265a6510 | 427 | |
ce1719a6 | 428 | dprintk("%s(0x%08x)\n", __func__, m); |
265a6510 ST |
429 | |
430 | switch(m) { | |
431 | case VSB_8: | |
ce1719a6 | 432 | dprintk("%s() VSB_8\n", __func__); |
f01699b4 ST |
433 | for (i = 0; i < ARRAY_SIZE(VSB_mod_tab); i++) |
434 | au8522_writereg(state, | |
435 | VSB_mod_tab[i].reg, | |
436 | VSB_mod_tab[i].data); | |
265a6510 ST |
437 | break; |
438 | case QAM_64: | |
439 | case QAM_256: | |
f01699b4 ST |
440 | dprintk("%s() QAM 64/256\n", __func__); |
441 | for (i = 0; i < ARRAY_SIZE(QAM_mod_tab); i++) | |
442 | au8522_writereg(state, | |
443 | QAM_mod_tab[i].reg, | |
444 | QAM_mod_tab[i].data); | |
265a6510 ST |
445 | break; |
446 | default: | |
ce1719a6 | 447 | dprintk("%s() Invalid modulation\n", __func__); |
265a6510 ST |
448 | return -EINVAL; |
449 | } | |
450 | ||
451 | state->current_modulation = m; | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
456 | /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ | |
e059b0fa MK |
457 | static int au8522_set_frontend(struct dvb_frontend *fe, |
458 | struct dvb_frontend_parameters *p) | |
265a6510 | 459 | { |
e059b0fa | 460 | struct au8522_state *state = fe->demodulator_priv; |
265a6510 | 461 | |
ce1719a6 | 462 | dprintk("%s(frequency=%d)\n", __func__, p->frequency); |
265a6510 ST |
463 | |
464 | state->current_frequency = p->frequency; | |
465 | ||
466 | au8522_enable_modulation(fe, p->u.vsb.modulation); | |
467 | ||
468 | /* Allow the demod to settle */ | |
469 | msleep(100); | |
470 | ||
471 | if (fe->ops.tuner_ops.set_params) { | |
472 | if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); | |
473 | fe->ops.tuner_ops.set_params(fe, p); | |
474 | if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); | |
475 | } | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | /* Reset the demod hardware and reset all of the configuration registers | |
481 | to a default state. */ | |
e059b0fa | 482 | static int au8522_init(struct dvb_frontend *fe) |
265a6510 | 483 | { |
e059b0fa | 484 | struct au8522_state *state = fe->demodulator_priv; |
ce1719a6 | 485 | dprintk("%s()\n", __func__); |
265a6510 ST |
486 | |
487 | au8522_writereg(state, 0xa4, 1 << 5); | |
488 | ||
489 | au8522_i2c_gate_ctrl(fe, 1); | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
e059b0fa | 494 | static int au8522_read_status(struct dvb_frontend *fe, fe_status_t *status) |
265a6510 | 495 | { |
e059b0fa | 496 | struct au8522_state *state = fe->demodulator_priv; |
265a6510 ST |
497 | u8 reg; |
498 | u32 tuner_status = 0; | |
499 | ||
500 | *status = 0; | |
501 | ||
502 | if (state->current_modulation == VSB_8) { | |
ce1719a6 | 503 | dprintk("%s() Checking VSB_8\n", __func__); |
265a6510 | 504 | reg = au8522_readreg(state, 0x4088); |
e059b0fa | 505 | if (reg & 0x01) |
265a6510 | 506 | *status |= FE_HAS_VITERBI; |
e059b0fa | 507 | if (reg & 0x02) |
265a6510 ST |
508 | *status |= FE_HAS_LOCK | FE_HAS_SYNC; |
509 | } else { | |
ce1719a6 | 510 | dprintk("%s() Checking QAM\n", __func__); |
265a6510 | 511 | reg = au8522_readreg(state, 0x4541); |
e059b0fa | 512 | if (reg & 0x80) |
265a6510 | 513 | *status |= FE_HAS_VITERBI; |
e059b0fa | 514 | if (reg & 0x20) |
265a6510 ST |
515 | *status |= FE_HAS_LOCK | FE_HAS_SYNC; |
516 | } | |
517 | ||
518 | switch(state->config->status_mode) { | |
519 | case AU8522_DEMODLOCKING: | |
ce1719a6 | 520 | dprintk("%s() DEMODLOCKING\n", __func__); |
265a6510 ST |
521 | if (*status & FE_HAS_VITERBI) |
522 | *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; | |
523 | break; | |
524 | case AU8522_TUNERLOCKING: | |
525 | /* Get the tuner status */ | |
ce1719a6 | 526 | dprintk("%s() TUNERLOCKING\n", __func__); |
265a6510 ST |
527 | if (fe->ops.tuner_ops.get_status) { |
528 | if (fe->ops.i2c_gate_ctrl) | |
529 | fe->ops.i2c_gate_ctrl(fe, 1); | |
530 | ||
531 | fe->ops.tuner_ops.get_status(fe, &tuner_status); | |
532 | ||
533 | if (fe->ops.i2c_gate_ctrl) | |
534 | fe->ops.i2c_gate_ctrl(fe, 0); | |
535 | } | |
536 | if (tuner_status) | |
537 | *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; | |
538 | break; | |
539 | } | |
540 | ||
ce1719a6 | 541 | dprintk("%s() status 0x%08x\n", __func__, *status); |
265a6510 ST |
542 | |
543 | return 0; | |
544 | } | |
545 | ||
f01699b4 | 546 | static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr) |
fb8152cb MK |
547 | { |
548 | struct au8522_state *state = fe->demodulator_priv; | |
f01699b4 | 549 | int ret = -EINVAL; |
fb8152cb | 550 | |
ce1719a6 | 551 | dprintk("%s()\n", __func__); |
265a6510 | 552 | |
f01699b4 | 553 | if (state->current_modulation == QAM_256) |
0daa5de7 MK |
554 | ret = au8522_mse2snr_lookup(qam256_mse2snr_tab, |
555 | ARRAY_SIZE(qam256_mse2snr_tab), | |
556 | au8522_readreg(state, 0x4522), | |
557 | snr); | |
f01699b4 | 558 | else if (state->current_modulation == QAM_64) |
0daa5de7 MK |
559 | ret = au8522_mse2snr_lookup(qam64_mse2snr_tab, |
560 | ARRAY_SIZE(qam64_mse2snr_tab), | |
561 | au8522_readreg(state, 0x4522), | |
562 | snr); | |
f01699b4 | 563 | else /* VSB_8 */ |
0daa5de7 MK |
564 | ret = au8522_mse2snr_lookup(vsb_mse2snr_tab, |
565 | ARRAY_SIZE(vsb_mse2snr_tab), | |
566 | au8522_readreg(state, 0x4311), | |
567 | snr); | |
f01699b4 ST |
568 | |
569 | return ret; | |
265a6510 ST |
570 | } |
571 | ||
e059b0fa MK |
572 | static int au8522_read_signal_strength(struct dvb_frontend *fe, |
573 | u16 *signal_strength) | |
265a6510 ST |
574 | { |
575 | return au8522_read_snr(fe, signal_strength); | |
576 | } | |
577 | ||
e059b0fa | 578 | static int au8522_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) |
265a6510 | 579 | { |
e059b0fa | 580 | struct au8522_state *state = fe->demodulator_priv; |
265a6510 | 581 | |
8973dc4b MK |
582 | if (state->current_modulation == VSB_8) |
583 | *ucblocks = au8522_readreg(state, 0x4087); | |
584 | else | |
585 | *ucblocks = au8522_readreg(state, 0x4543); | |
265a6510 ST |
586 | |
587 | return 0; | |
588 | } | |
589 | ||
e059b0fa | 590 | static int au8522_read_ber(struct dvb_frontend *fe, u32 *ber) |
265a6510 ST |
591 | { |
592 | return au8522_read_ucblocks(fe, ber); | |
593 | } | |
594 | ||
e059b0fa | 595 | static int au8522_get_frontend(struct dvb_frontend *fe, |
265a6510 ST |
596 | struct dvb_frontend_parameters *p) |
597 | { | |
e059b0fa | 598 | struct au8522_state *state = fe->demodulator_priv; |
265a6510 ST |
599 | |
600 | p->frequency = state->current_frequency; | |
601 | p->u.vsb.modulation = state->current_modulation; | |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
e059b0fa MK |
606 | static int au8522_get_tune_settings(struct dvb_frontend *fe, |
607 | struct dvb_frontend_tune_settings *tune) | |
265a6510 ST |
608 | { |
609 | tune->min_delay_ms = 1000; | |
610 | return 0; | |
611 | } | |
612 | ||
e059b0fa | 613 | static void au8522_release(struct dvb_frontend *fe) |
265a6510 | 614 | { |
e059b0fa | 615 | struct au8522_state *state = fe->demodulator_priv; |
265a6510 ST |
616 | kfree(state); |
617 | } | |
618 | ||
619 | static struct dvb_frontend_ops au8522_ops; | |
620 | ||
e059b0fa MK |
621 | struct dvb_frontend *au8522_attach(const struct au8522_config *config, |
622 | struct i2c_adapter *i2c) | |
265a6510 | 623 | { |
e059b0fa | 624 | struct au8522_state *state = NULL; |
265a6510 ST |
625 | |
626 | /* allocate memory for the internal state */ | |
627 | state = kmalloc(sizeof(struct au8522_state), GFP_KERNEL); | |
628 | if (state == NULL) | |
629 | goto error; | |
630 | ||
631 | /* setup the state */ | |
632 | state->config = config; | |
633 | state->i2c = i2c; | |
634 | /* create dvb_frontend */ | |
635 | memcpy(&state->frontend.ops, &au8522_ops, | |
636 | sizeof(struct dvb_frontend_ops)); | |
637 | state->frontend.demodulator_priv = state; | |
638 | ||
639 | if (au8522_init(&state->frontend) != 0) { | |
640 | printk(KERN_ERR "%s: Failed to initialize correctly\n", | |
ce1719a6 | 641 | __func__); |
265a6510 ST |
642 | goto error; |
643 | } | |
644 | ||
645 | /* Note: Leaving the I2C gate open here. */ | |
646 | au8522_i2c_gate_ctrl(&state->frontend, 1); | |
647 | ||
648 | return &state->frontend; | |
649 | ||
650 | error: | |
651 | kfree(state); | |
652 | return NULL; | |
653 | } | |
654 | ||
655 | static struct dvb_frontend_ops au8522_ops = { | |
656 | ||
657 | .info = { | |
658 | .name = "Auvitek AU8522 QAM/8VSB Frontend", | |
659 | .type = FE_ATSC, | |
660 | .frequency_min = 54000000, | |
661 | .frequency_max = 858000000, | |
662 | .frequency_stepsize = 62500, | |
663 | .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB | |
664 | }, | |
665 | ||
666 | .init = au8522_init, | |
667 | .i2c_gate_ctrl = au8522_i2c_gate_ctrl, | |
668 | .set_frontend = au8522_set_frontend, | |
669 | .get_frontend = au8522_get_frontend, | |
670 | .get_tune_settings = au8522_get_tune_settings, | |
671 | .read_status = au8522_read_status, | |
672 | .read_ber = au8522_read_ber, | |
673 | .read_signal_strength = au8522_read_signal_strength, | |
674 | .read_snr = au8522_read_snr, | |
675 | .read_ucblocks = au8522_read_ucblocks, | |
676 | .release = au8522_release, | |
677 | }; | |
678 | ||
679 | module_param(debug, int, 0644); | |
680 | MODULE_PARM_DESC(debug, "Enable verbose debug messages"); | |
681 | ||
682 | MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver"); | |
683 | MODULE_AUTHOR("Steven Toth"); | |
684 | MODULE_LICENSE("GPL"); | |
685 | ||
686 | EXPORT_SYMBOL(au8522_attach); | |
687 | ||
688 | /* | |
689 | * Local variables: | |
690 | * c-basic-offset: 8 | |
691 | */ |