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f15da16d DW |
1 | /* |
2 | * Support for Legend Silicon DMB-TH demodulator | |
3 | * LGS8913, LGS8GL5 | |
4 | * experimental support LGS8G42, LGS8G52 | |
5 | * | |
6 | * Copyright (C) 2007,2008 David T.L. Wong <davidtlwong@gmail.com> | |
7 | * Copyright (C) 2008 Sirius International (Hong Kong) Limited | |
8 | * Timothy Lee <timothy.lee@siriushk.com> (for initial work on LGS8GL5) | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <asm/div64.h> | |
27 | ||
28 | #include "dvb_frontend.h" | |
29 | ||
30 | #include "lgs8gxx.h" | |
31 | #include "lgs8gxx_priv.h" | |
32 | ||
33 | #define dprintk(args...) \ | |
34 | do { \ | |
35 | if (debug) \ | |
36 | printk(KERN_DEBUG "lgs8gxx: " args); \ | |
37 | } while (0) | |
38 | ||
39 | static int debug; | |
ba7d457d | 40 | static int fake_signal_str = 1; |
f15da16d DW |
41 | |
42 | module_param(debug, int, 0644); | |
43 | MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); | |
44 | ||
45 | module_param(fake_signal_str, int, 0644); | |
46 | MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913." | |
ba7d457d | 47 | "Signal strength calculation is slow.(default:on)."); |
f15da16d DW |
48 | |
49 | /* LGS8GXX internal helper functions */ | |
50 | ||
51 | static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data) | |
52 | { | |
53 | int ret; | |
54 | u8 buf[] = { reg, data }; | |
55 | struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 }; | |
56 | ||
57 | msg.addr = priv->config->demod_address; | |
58 | if (reg >= 0xC0) | |
59 | msg.addr += 0x02; | |
60 | ||
61 | if (debug >= 2) | |
62 | printk(KERN_DEBUG "%s: reg=0x%02X, data=0x%02X\n", | |
63 | __func__, reg, data); | |
64 | ||
65 | ret = i2c_transfer(priv->i2c, &msg, 1); | |
66 | ||
67 | if (ret != 1) | |
68 | dprintk(KERN_DEBUG "%s: error reg=0x%x, data=0x%x, ret=%i\n", | |
69 | __func__, reg, data, ret); | |
70 | ||
71 | return (ret != 1) ? -1 : 0; | |
72 | } | |
73 | ||
74 | static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data) | |
75 | { | |
76 | int ret; | |
77 | u8 dev_addr; | |
78 | ||
79 | u8 b0[] = { reg }; | |
80 | u8 b1[] = { 0 }; | |
81 | struct i2c_msg msg[] = { | |
82 | { .flags = 0, .buf = b0, .len = 1 }, | |
83 | { .flags = I2C_M_RD, .buf = b1, .len = 1 }, | |
84 | }; | |
85 | ||
86 | dev_addr = priv->config->demod_address; | |
87 | if (reg >= 0xC0) | |
88 | dev_addr += 0x02; | |
89 | msg[1].addr = msg[0].addr = dev_addr; | |
90 | ||
91 | ret = i2c_transfer(priv->i2c, msg, 2); | |
92 | if (ret != 2) { | |
93 | dprintk(KERN_DEBUG "%s: error reg=0x%x, ret=%i\n", | |
94 | __func__, reg, ret); | |
95 | return -1; | |
96 | } | |
97 | ||
98 | *p_data = b1[0]; | |
99 | if (debug >= 2) | |
100 | printk(KERN_DEBUG "%s: reg=0x%02X, data=0x%02X\n", | |
101 | __func__, reg, b1[0]); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv) | |
106 | { | |
107 | lgs8gxx_write_reg(priv, 0x02, 0x00); | |
108 | msleep(1); | |
109 | lgs8gxx_write_reg(priv, 0x02, 0x01); | |
110 | msleep(100); | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv) | |
116 | { | |
117 | const struct lgs8gxx_config *config = priv->config; | |
118 | u8 if_conf; | |
119 | ||
120 | if_conf = 0x10; /* AGC output on; */ | |
121 | ||
122 | if_conf |= | |
123 | ((config->ext_adc) ? 0x80 : 0x00) | | |
124 | ((config->if_neg_center) ? 0x04 : 0x00) | | |
125 | ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */ | |
126 | ((config->ext_adc && config->adc_signed) ? 0x02 : 0x00) | | |
127 | ((config->ext_adc && config->if_neg_edge) ? 0x01 : 0x00); | |
128 | ||
129 | if (config->ext_adc && | |
130 | (config->prod == LGS8GXX_PROD_LGS8G52)) { | |
131 | lgs8gxx_write_reg(priv, 0xBA, 0x40); | |
132 | } | |
133 | ||
134 | lgs8gxx_write_reg(priv, 0x07, if_conf); | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/) | |
140 | { | |
141 | u64 val; | |
142 | u32 v32; | |
143 | u32 if_clk; | |
144 | ||
145 | if_clk = priv->config->if_clk_freq; | |
146 | ||
147 | val = freq; | |
148 | if (freq != 0) { | |
149 | val *= (u64)1 << 32; | |
150 | if (if_clk != 0) | |
151 | do_div(val, if_clk); | |
152 | v32 = val & 0xFFFFFFFF; | |
153 | dprintk("Set IF Freq to %dkHz\n", freq); | |
154 | } else { | |
155 | v32 = 0; | |
156 | dprintk("Set IF Freq to baseband\n"); | |
157 | } | |
158 | dprintk("AFC_INIT_FREQ = 0x%08X\n", v32); | |
159 | ||
160 | lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32)); | |
161 | lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8)); | |
162 | lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16)); | |
163 | lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24)); | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv) | |
169 | { | |
170 | u8 t; | |
171 | ||
172 | if (priv->config->prod == LGS8GXX_PROD_LGS8913) | |
173 | lgs8gxx_write_reg(priv, 0xC6, 0x01); | |
174 | ||
175 | lgs8gxx_read_reg(priv, 0x7E, &t); | |
176 | lgs8gxx_write_reg(priv, 0x7E, t | 0x01); | |
177 | ||
178 | /* clear FEC self reset */ | |
179 | lgs8gxx_read_reg(priv, 0xC5, &t); | |
180 | lgs8gxx_write_reg(priv, 0xC5, t & 0xE0); | |
181 | ||
182 | if (priv->config->prod == LGS8GXX_PROD_LGS8913) { | |
183 | /* FEC auto detect */ | |
184 | lgs8gxx_write_reg(priv, 0xC1, 0x03); | |
185 | ||
186 | lgs8gxx_read_reg(priv, 0x7C, &t); | |
187 | t = (t & 0x8C) | 0x03; | |
188 | lgs8gxx_write_reg(priv, 0x7C, t); | |
189 | } | |
190 | ||
191 | ||
192 | if (priv->config->prod == LGS8GXX_PROD_LGS8913) { | |
193 | /* BER test mode */ | |
194 | lgs8gxx_read_reg(priv, 0xC3, &t); | |
195 | t = (t & 0xEF) | 0x10; | |
196 | lgs8gxx_write_reg(priv, 0xC3, t); | |
197 | } | |
198 | ||
199 | if (priv->config->prod == LGS8GXX_PROD_LGS8G52) | |
200 | lgs8gxx_write_reg(priv, 0xD9, 0x40); | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
205 | static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv) | |
206 | { | |
207 | int ret = 0; | |
208 | u8 t; | |
209 | ||
210 | /* turn off auto-detect; manual settings */ | |
211 | lgs8gxx_write_reg(priv, 0x7E, 0); | |
212 | if (priv->config->prod == LGS8GXX_PROD_LGS8913) | |
213 | lgs8gxx_write_reg(priv, 0xC1, 0); | |
214 | ||
215 | ret = lgs8gxx_read_reg(priv, 0xC5, &t); | |
216 | t = (t & 0xE0) | 0x06; | |
217 | lgs8gxx_write_reg(priv, 0xC5, t); | |
218 | ||
219 | lgs8gxx_soft_reset(priv); | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked) | |
225 | { | |
226 | int ret = 0; | |
227 | u8 t; | |
228 | ||
229 | ret = lgs8gxx_read_reg(priv, 0x4B, &t); | |
230 | if (ret != 0) | |
231 | return ret; | |
232 | ||
233 | *locked = ((t & 0xC0) == 0xC0) ? 1 : 0; | |
234 | return 0; | |
235 | } | |
236 | ||
237 | static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv, | |
238 | u8 *finished) | |
239 | { | |
240 | int ret = 0; | |
241 | u8 t; | |
242 | ||
243 | ret = lgs8gxx_read_reg(priv, 0xA4, &t); | |
244 | if (ret != 0) | |
245 | return ret; | |
246 | ||
247 | *finished = ((t & 0x3) == 0x1) ? 1 : 0; | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 *locked) | |
253 | { | |
254 | int err; | |
255 | u8 ad_fini = 0; | |
256 | ||
257 | if (gi == GI_945) | |
258 | dprintk("try GI 945\n"); | |
259 | else if (gi == GI_595) | |
260 | dprintk("try GI 595\n"); | |
261 | else if (gi == GI_420) | |
262 | dprintk("try GI 420\n"); | |
263 | lgs8gxx_write_reg(priv, 0x04, gi); | |
264 | lgs8gxx_soft_reset(priv); | |
265 | msleep(50); | |
266 | err = lgs8gxx_is_autodetect_finished(priv, &ad_fini); | |
267 | if (err != 0) | |
268 | return err; | |
269 | if (ad_fini) { | |
270 | err = lgs8gxx_is_locked(priv, locked); | |
271 | if (err != 0) | |
272 | return err; | |
273 | } | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv, | |
279 | u8 *detected_param, u8 *gi) | |
280 | { | |
281 | int i, j; | |
282 | int err = 0; | |
283 | u8 locked = 0, tmp_gi; | |
284 | ||
285 | dprintk("%s\n", __func__); | |
286 | ||
287 | lgs8gxx_set_mode_auto(priv); | |
288 | /* Guard Interval */ | |
289 | lgs8gxx_write_reg(priv, 0x03, 00); | |
290 | ||
291 | for (i = 0; i < 2; i++) { | |
292 | for (j = 0; j < 2; j++) { | |
293 | tmp_gi = GI_945; | |
294 | err = lgs8gxx_autolock_gi(priv, GI_945, &locked); | |
295 | if (err) | |
296 | goto out; | |
297 | if (locked) | |
298 | goto locked; | |
299 | } | |
300 | for (j = 0; j < 2; j++) { | |
301 | tmp_gi = GI_420; | |
302 | err = lgs8gxx_autolock_gi(priv, GI_420, &locked); | |
303 | if (err) | |
304 | goto out; | |
305 | if (locked) | |
306 | goto locked; | |
307 | } | |
308 | tmp_gi = GI_595; | |
309 | err = lgs8gxx_autolock_gi(priv, GI_595, &locked); | |
310 | if (err) | |
311 | goto out; | |
312 | if (locked) | |
313 | goto locked; | |
314 | } | |
315 | ||
316 | locked: | |
317 | if ((err == 0) && (locked == 1)) { | |
318 | u8 t; | |
319 | ||
320 | lgs8gxx_read_reg(priv, 0xA2, &t); | |
321 | *detected_param = t; | |
322 | ||
323 | if (tmp_gi == GI_945) | |
324 | dprintk("GI 945 locked\n"); | |
325 | else if (tmp_gi == GI_595) | |
326 | dprintk("GI 595 locked\n"); | |
327 | else if (tmp_gi == GI_420) | |
328 | dprintk("GI 420 locked\n"); | |
329 | *gi = tmp_gi; | |
330 | } | |
331 | if (!locked) | |
332 | err = -1; | |
333 | ||
334 | out: | |
335 | return err; | |
336 | } | |
337 | ||
338 | static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv) | |
339 | { | |
340 | s8 err; | |
341 | u8 gi = 0x2; | |
342 | u8 detected_param = 0; | |
343 | ||
344 | err = lgs8gxx_auto_detect(priv, &detected_param, &gi); | |
345 | ||
346 | if (err != 0) { | |
347 | dprintk("lgs8gxx_auto_detect failed\n"); | |
348 | } | |
349 | ||
350 | /* Apply detected parameters */ | |
351 | if (priv->config->prod == LGS8GXX_PROD_LGS8913) { | |
352 | u8 inter_leave_len = detected_param & TIM_MASK ; | |
353 | inter_leave_len = (inter_leave_len == TIM_LONG) ? 0x60 : 0x40; | |
354 | detected_param &= CF_MASK | SC_MASK | LGS_FEC_MASK; | |
355 | detected_param |= inter_leave_len; | |
356 | } | |
357 | lgs8gxx_write_reg(priv, 0x7D, detected_param); | |
358 | if (priv->config->prod == LGS8GXX_PROD_LGS8913) | |
359 | lgs8gxx_write_reg(priv, 0xC0, detected_param); | |
360 | /* lgs8gxx_soft_reset(priv); */ | |
361 | ||
362 | /* Enter manual mode */ | |
363 | lgs8gxx_set_mode_manual(priv); | |
364 | ||
365 | switch (gi) { | |
366 | case GI_945: | |
367 | priv->curr_gi = 945; break; | |
368 | case GI_595: | |
369 | priv->curr_gi = 595; break; | |
370 | case GI_420: | |
371 | priv->curr_gi = 420; break; | |
372 | default: | |
373 | priv->curr_gi = 945; break; | |
374 | } | |
375 | } | |
376 | ||
377 | static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv, | |
378 | u8 serial, u8 clk_pol, u8 clk_gated) | |
379 | { | |
380 | int ret = 0; | |
381 | u8 t; | |
382 | ||
383 | ret = lgs8gxx_read_reg(priv, 0xC2, &t); | |
384 | if (ret != 0) | |
385 | return ret; | |
386 | ||
387 | t &= 0xF8; | |
388 | t |= serial ? TS_SERIAL : TS_PARALLEL; | |
389 | t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL; | |
390 | t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN; | |
391 | ||
392 | ret = lgs8gxx_write_reg(priv, 0xC2, t); | |
393 | if (ret != 0) | |
394 | return ret; | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | ||
400 | /* LGS8913 demod frontend functions */ | |
401 | ||
402 | static int lgs8913_init(struct lgs8gxx_state *priv) | |
403 | { | |
404 | u8 t; | |
405 | ||
406 | /* LGS8913 specific */ | |
407 | lgs8gxx_write_reg(priv, 0xc1, 0x3); | |
408 | ||
409 | lgs8gxx_read_reg(priv, 0x7c, &t); | |
410 | lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3); | |
411 | ||
412 | /* LGS8913 specific */ | |
413 | lgs8gxx_read_reg(priv, 0xc3, &t); | |
414 | lgs8gxx_write_reg(priv, 0xc3, t&0x10); | |
415 | ||
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
420 | static int lgs8gxx_init(struct dvb_frontend *fe) | |
421 | { | |
422 | struct lgs8gxx_state *priv = | |
423 | (struct lgs8gxx_state *)fe->demodulator_priv; | |
424 | const struct lgs8gxx_config *config = priv->config; | |
425 | u8 data = 0; | |
426 | s8 err; | |
427 | dprintk("%s\n", __func__); | |
428 | ||
429 | lgs8gxx_read_reg(priv, 0, &data); | |
430 | dprintk("reg 0 = 0x%02X\n", data); | |
431 | ||
432 | /* Setup MPEG output format */ | |
433 | err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts, | |
434 | config->ts_clk_pol, | |
435 | config->ts_clk_gated); | |
436 | if (err != 0) | |
437 | return -EIO; | |
438 | ||
439 | if (config->prod == LGS8GXX_PROD_LGS8913) | |
440 | lgs8913_init(priv); | |
441 | lgs8gxx_set_if_freq(priv, priv->config->if_freq); | |
442 | if (config->prod != LGS8GXX_PROD_LGS8913) | |
443 | lgs8gxx_set_ad_mode(priv); | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | static void lgs8gxx_release(struct dvb_frontend *fe) | |
449 | { | |
450 | struct lgs8gxx_state *state = fe->demodulator_priv; | |
451 | dprintk("%s\n", __func__); | |
452 | ||
453 | kfree(state); | |
454 | } | |
455 | ||
456 | ||
457 | static int lgs8gxx_write(struct dvb_frontend *fe, u8 *buf, int len) | |
458 | { | |
459 | struct lgs8gxx_state *priv = fe->demodulator_priv; | |
460 | ||
461 | if (len != 2) | |
462 | return -EINVAL; | |
463 | ||
464 | return lgs8gxx_write_reg(priv, buf[0], buf[1]); | |
465 | } | |
466 | ||
467 | static int lgs8gxx_set_fe(struct dvb_frontend *fe, | |
468 | struct dvb_frontend_parameters *fe_params) | |
469 | { | |
470 | struct lgs8gxx_state *priv = fe->demodulator_priv; | |
471 | ||
472 | dprintk("%s\n", __func__); | |
473 | ||
474 | /* set frequency */ | |
475 | if (fe->ops.tuner_ops.set_params) { | |
476 | fe->ops.tuner_ops.set_params(fe, fe_params); | |
477 | if (fe->ops.i2c_gate_ctrl) | |
478 | fe->ops.i2c_gate_ctrl(fe, 0); | |
479 | } | |
480 | ||
481 | /* start auto lock */ | |
482 | lgs8gxx_auto_lock(priv); | |
483 | ||
484 | msleep(10); | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | static int lgs8gxx_get_fe(struct dvb_frontend *fe, | |
490 | struct dvb_frontend_parameters *fe_params) | |
491 | { | |
492 | struct lgs8gxx_state *priv = fe->demodulator_priv; | |
493 | u8 t; | |
494 | ||
495 | dprintk("%s\n", __func__); | |
496 | ||
497 | /* TODO: get real readings from device */ | |
498 | /* inversion status */ | |
499 | fe_params->inversion = INVERSION_OFF; | |
500 | ||
501 | /* bandwidth */ | |
502 | fe_params->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; | |
503 | ||
504 | ||
505 | lgs8gxx_read_reg(priv, 0x7D, &t); | |
506 | fe_params->u.ofdm.code_rate_HP = FEC_AUTO; | |
507 | fe_params->u.ofdm.code_rate_LP = FEC_AUTO; | |
508 | ||
509 | /* constellation */ | |
510 | switch (t & SC_MASK) { | |
511 | case SC_QAM64: | |
512 | fe_params->u.ofdm.constellation = QAM_64; | |
513 | break; | |
514 | case SC_QAM32: | |
515 | fe_params->u.ofdm.constellation = QAM_32; | |
516 | break; | |
517 | case SC_QAM16: | |
518 | fe_params->u.ofdm.constellation = QAM_16; | |
519 | break; | |
520 | case SC_QAM4: | |
521 | case SC_QAM4NR: | |
522 | fe_params->u.ofdm.constellation = QPSK; | |
523 | break; | |
524 | default: | |
525 | fe_params->u.ofdm.constellation = QAM_64; | |
526 | } | |
527 | ||
528 | /* transmission mode */ | |
529 | fe_params->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO; | |
530 | ||
531 | /* guard interval */ | |
532 | fe_params->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO; | |
533 | ||
534 | /* hierarchy */ | |
535 | fe_params->u.ofdm.hierarchy_information = HIERARCHY_NONE; | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
540 | static | |
541 | int lgs8gxx_get_tune_settings(struct dvb_frontend *fe, | |
542 | struct dvb_frontend_tune_settings *fesettings) | |
543 | { | |
544 | /* FIXME: copy from tda1004x.c */ | |
545 | fesettings->min_delay_ms = 800; | |
546 | fesettings->step_size = 0; | |
547 | fesettings->max_drift = 0; | |
548 | return 0; | |
549 | } | |
550 | ||
551 | static int lgs8gxx_read_status(struct dvb_frontend *fe, fe_status_t *fe_status) | |
552 | { | |
553 | struct lgs8gxx_state *priv = fe->demodulator_priv; | |
554 | s8 ret; | |
555 | u8 t; | |
556 | ||
557 | dprintk("%s\n", __func__); | |
558 | ||
559 | ret = lgs8gxx_read_reg(priv, 0x4B, &t); | |
560 | if (ret != 0) | |
561 | return -EIO; | |
562 | ||
563 | dprintk("Reg 0x4B: 0x%02X\n", t); | |
564 | ||
565 | *fe_status = 0; | |
566 | if (priv->config->prod == LGS8GXX_PROD_LGS8913) { | |
567 | if ((t & 0x40) == 0x40) | |
568 | *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER; | |
569 | if ((t & 0x80) == 0x80) | |
570 | *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC | | |
571 | FE_HAS_LOCK; | |
572 | } else { | |
573 | if ((t & 0x80) == 0x80) | |
574 | *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | | |
575 | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; | |
576 | } | |
577 | ||
578 | /* success */ | |
579 | dprintk("%s: fe_status=0x%x\n", __func__, *fe_status); | |
580 | return 0; | |
581 | } | |
582 | ||
583 | static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal) | |
584 | { | |
585 | u16 v; | |
586 | u8 agc_lvl[2], cat; | |
587 | ||
588 | dprintk("%s()\n", __func__); | |
589 | lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]); | |
590 | lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]); | |
591 | ||
592 | v = agc_lvl[0]; | |
593 | v <<= 8; | |
594 | v |= agc_lvl[1]; | |
595 | ||
596 | dprintk("agc_lvl: 0x%04X\n", v); | |
597 | ||
598 | if (v < 0x100) | |
599 | cat = 0; | |
600 | else if (v < 0x190) | |
601 | cat = 5; | |
602 | else if (v < 0x2A8) | |
603 | cat = 4; | |
604 | else if (v < 0x381) | |
605 | cat = 3; | |
606 | else if (v < 0x400) | |
607 | cat = 2; | |
608 | else if (v == 0x400) | |
609 | cat = 1; | |
610 | else | |
611 | cat = 0; | |
612 | ||
6762d953 | 613 | *signal = cat * 65535 / 5; |
f15da16d DW |
614 | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal) | |
619 | { | |
620 | u8 t; s8 ret; | |
621 | s16 max_strength = 0; | |
622 | u8 str; | |
623 | u16 i, gi = priv->curr_gi; | |
624 | ||
625 | dprintk("%s\n", __func__); | |
626 | ||
627 | ret = lgs8gxx_read_reg(priv, 0x4B, &t); | |
628 | if (ret != 0) | |
629 | return -EIO; | |
630 | ||
631 | if (fake_signal_str) { | |
632 | if ((t & 0xC0) == 0xC0) { | |
6762d953 DW |
633 | dprintk("Fake signal strength\n"); |
634 | *signal = 0x7FFF; | |
f15da16d DW |
635 | } else |
636 | *signal = 0; | |
637 | return 0; | |
638 | } | |
639 | ||
640 | dprintk("gi = %d\n", gi); | |
641 | for (i = 0; i < gi; i++) { | |
642 | ||
643 | if ((i & 0xFF) == 0) | |
644 | lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8)); | |
645 | lgs8gxx_write_reg(priv, 0x83, i & 0xFF); | |
646 | ||
647 | lgs8gxx_read_reg(priv, 0x94, &str); | |
648 | if (max_strength < str) | |
649 | max_strength = str; | |
650 | } | |
651 | ||
652 | *signal = max_strength; | |
653 | dprintk("%s: signal=0x%02X\n", __func__, *signal); | |
654 | ||
655 | lgs8gxx_read_reg(priv, 0x95, &t); | |
656 | dprintk("%s: AVG Noise=0x%02X\n", __func__, t); | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
661 | static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal) | |
662 | { | |
663 | struct lgs8gxx_state *priv = fe->demodulator_priv; | |
664 | ||
665 | if (priv->config->prod == LGS8GXX_PROD_LGS8913) | |
666 | return lgs8913_read_signal_strength(priv, signal); | |
667 | else | |
668 | return lgs8gxx_read_signal_agc(priv, signal); | |
669 | } | |
670 | ||
671 | static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr) | |
672 | { | |
673 | struct lgs8gxx_state *priv = fe->demodulator_priv; | |
674 | u8 t; | |
675 | *snr = 0; | |
676 | ||
677 | lgs8gxx_read_reg(priv, 0x95, &t); | |
678 | dprintk("AVG Noise=0x%02X\n", t); | |
679 | *snr = 256 - t; | |
680 | *snr <<= 8; | |
681 | dprintk("snr=0x%x\n", *snr); | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
686 | static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) | |
687 | { | |
688 | *ucblocks = 0; | |
689 | dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks); | |
690 | return 0; | |
691 | } | |
692 | ||
693 | static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber) | |
694 | { | |
695 | struct lgs8gxx_state *priv = fe->demodulator_priv; | |
696 | u8 r0, r1, r2, r3; | |
697 | u32 total_cnt, err_cnt; | |
698 | ||
699 | dprintk("%s\n", __func__); | |
700 | ||
701 | lgs8gxx_write_reg(priv, 0xc6, 0x01); | |
702 | lgs8gxx_write_reg(priv, 0xc6, 0x41); | |
703 | lgs8gxx_write_reg(priv, 0xc6, 0x01); | |
704 | ||
705 | msleep(200); | |
706 | ||
707 | lgs8gxx_write_reg(priv, 0xc6, 0x81); | |
708 | lgs8gxx_read_reg(priv, 0xd0, &r0); | |
709 | lgs8gxx_read_reg(priv, 0xd1, &r1); | |
710 | lgs8gxx_read_reg(priv, 0xd2, &r2); | |
711 | lgs8gxx_read_reg(priv, 0xd3, &r3); | |
712 | total_cnt = (r3 << 24) | (r2 << 16) | (r1 << 8) | (r0); | |
713 | lgs8gxx_read_reg(priv, 0xd4, &r0); | |
714 | lgs8gxx_read_reg(priv, 0xd5, &r1); | |
715 | lgs8gxx_read_reg(priv, 0xd6, &r2); | |
716 | lgs8gxx_read_reg(priv, 0xd7, &r3); | |
717 | err_cnt = (r3 << 24) | (r2 << 16) | (r1 << 8) | (r0); | |
718 | dprintk("error=%d total=%d\n", err_cnt, total_cnt); | |
719 | ||
720 | if (total_cnt == 0) | |
721 | *ber = 0; | |
722 | else | |
723 | *ber = err_cnt * 100 / total_cnt; | |
724 | ||
725 | dprintk("%s: ber=0x%x\n", __func__, *ber); | |
726 | return 0; | |
727 | } | |
728 | ||
729 | static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) | |
730 | { | |
731 | struct lgs8gxx_state *priv = fe->demodulator_priv; | |
732 | ||
733 | if (priv->config->tuner_address == 0) | |
734 | return 0; | |
735 | if (enable) { | |
736 | u8 v = 0x80 | priv->config->tuner_address; | |
737 | return lgs8gxx_write_reg(priv, 0x01, v); | |
738 | } | |
739 | return lgs8gxx_write_reg(priv, 0x01, 0); | |
740 | } | |
741 | ||
742 | static struct dvb_frontend_ops lgs8gxx_ops = { | |
743 | .info = { | |
744 | .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH", | |
745 | .type = FE_OFDM, | |
746 | .frequency_min = 474000000, | |
747 | .frequency_max = 858000000, | |
748 | .frequency_stepsize = 10000, | |
749 | .caps = | |
750 | FE_CAN_FEC_AUTO | | |
751 | FE_CAN_QAM_AUTO | | |
752 | FE_CAN_TRANSMISSION_MODE_AUTO | | |
753 | FE_CAN_GUARD_INTERVAL_AUTO | |
754 | }, | |
755 | ||
756 | .release = lgs8gxx_release, | |
757 | ||
758 | .init = lgs8gxx_init, | |
759 | .write = lgs8gxx_write, | |
760 | .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl, | |
761 | ||
762 | .set_frontend = lgs8gxx_set_fe, | |
763 | .get_frontend = lgs8gxx_get_fe, | |
764 | .get_tune_settings = lgs8gxx_get_tune_settings, | |
765 | ||
766 | .read_status = lgs8gxx_read_status, | |
767 | .read_ber = lgs8gxx_read_ber, | |
768 | .read_signal_strength = lgs8gxx_read_signal_strength, | |
769 | .read_snr = lgs8gxx_read_snr, | |
770 | .read_ucblocks = lgs8gxx_read_ucblocks, | |
771 | }; | |
772 | ||
773 | struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config, | |
774 | struct i2c_adapter *i2c) | |
775 | { | |
776 | struct lgs8gxx_state *priv = NULL; | |
777 | u8 data = 0; | |
778 | ||
779 | dprintk("%s()\n", __func__); | |
780 | ||
781 | if (config == NULL || i2c == NULL) | |
782 | return NULL; | |
783 | ||
784 | priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL); | |
785 | if (priv == NULL) | |
786 | goto error_out; | |
787 | ||
788 | priv->config = config; | |
789 | priv->i2c = i2c; | |
790 | ||
791 | /* check if the demod is there */ | |
792 | if (lgs8gxx_read_reg(priv, 0, &data) != 0) { | |
793 | dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n", | |
794 | __func__, priv->config->demod_address); | |
795 | goto error_out; | |
796 | } | |
797 | ||
798 | lgs8gxx_read_reg(priv, 1, &data); | |
799 | ||
800 | memcpy(&priv->frontend.ops, &lgs8gxx_ops, | |
801 | sizeof(struct dvb_frontend_ops)); | |
802 | priv->frontend.demodulator_priv = priv; | |
803 | ||
804 | return &priv->frontend; | |
805 | ||
806 | error_out: | |
807 | dprintk("%s() error_out\n", __func__); | |
808 | kfree(priv); | |
809 | return NULL; | |
810 | ||
811 | } | |
812 | EXPORT_SYMBOL(lgs8gxx_attach); | |
813 | ||
814 | MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver"); | |
815 | MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>"); | |
816 | MODULE_LICENSE("GPL"); |