1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Frontend driver for mobile DVB-T demodulator DiBcom 3000M-B
4 * DiBcom (http://www.dibcom.fr/)
5 *
6 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de)
7 *
8 * based on GPL code from DibCom, which has
9 *
10 * Copyright (C) 2004 Amaury Demol for DiBcom
11 *
12 * Acknowledgements
13 *
14 * Amaury Demol from DiBcom for providing specs and driver
15 * sources, on which this driver (and the dvb-dibusb) are based.
16 *
17 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
18 */
19
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/delay.h>
26 #include <linux/string.h>
27 #include <linux/slab.h>
28
29 #include <media/dvb_frontend.h>
30
31 #include "dib3000.h"
32 #include "dib3000mb_priv.h"
33
34 /* Version information */
35 #define DRIVER_VERSION "0.1"
36 #define DRIVER_DESC "DiBcom 3000M-B DVB-T demodulator"
37 #define DRIVER_AUTHOR "Patrick Boettcher, patrick.boettcher@posteo.de"
38
39 static int debug;
40 module_param(debug, int, 0644);
41 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=xfer,4=setfe,8=getfe (|-able)).");
42
43 #define deb_info(args...) dprintk(0x01, args)
44 #define deb_i2c(args...) dprintk(0x02, args)
45 #define deb_srch(args...) dprintk(0x04, args)
46 #define deb_info(args...) dprintk(0x01, args)
47 #define deb_xfer(args...) dprintk(0x02, args)
48 #define deb_setf(args...) dprintk(0x04, args)
49 #define deb_getf(args...) dprintk(0x08, args)
50
dib3000_read_reg(struct dib3000_state * state,u16 reg)51 static int dib3000_read_reg(struct dib3000_state *state, u16 reg)
52 {
53 u8 wb[] = { ((reg >> 8) | 0x80) & 0xff, reg & 0xff };
54 u8 rb[2];
55 struct i2c_msg msg[] = {
56 { .addr = state->config.demod_address, .flags = 0, .buf = wb, .len = 2 },
57 { .addr = state->config.demod_address, .flags = I2C_M_RD, .buf = rb, .len = 2 },
58 };
59
60 if (i2c_transfer(state->i2c, msg, 2) != 2)
61 deb_i2c("i2c read error\n");
62
63 deb_i2c("reading i2c bus (reg: %5d 0x%04x, val: %5d 0x%04x)\n",reg,reg,
64 (rb[0] << 8) | rb[1],(rb[0] << 8) | rb[1]);
65
66 return (rb[0] << 8) | rb[1];
67 }
68
dib3000_write_reg(struct dib3000_state * state,u16 reg,u16 val)69 static int dib3000_write_reg(struct dib3000_state *state, u16 reg, u16 val)
70 {
71 u8 b[] = {
72 (reg >> 8) & 0xff, reg & 0xff,
73 (val >> 8) & 0xff, val & 0xff,
74 };
75 struct i2c_msg msg[] = {
76 { .addr = state->config.demod_address, .flags = 0, .buf = b, .len = 4 }
77 };
78 deb_i2c("writing i2c bus (reg: %5d 0x%04x, val: %5d 0x%04x)\n",reg,reg,val,val);
79
80 return i2c_transfer(state->i2c,msg, 1) != 1 ? -EREMOTEIO : 0;
81 }
82
dib3000_search_status(u16 irq,u16 lock)83 static int dib3000_search_status(u16 irq,u16 lock)
84 {
85 if (irq & 0x02) {
86 if (lock & 0x01) {
87 deb_srch("auto search succeeded\n");
88 return 1; // auto search succeeded
89 } else {
90 deb_srch("auto search not successful\n");
91 return 0; // auto search failed
92 }
93 } else if (irq & 0x01) {
94 deb_srch("auto search failed\n");
95 return 0; // auto search failed
96 }
97 return -1; // try again
98 }
99
100 /* for auto search */
101 static u16 dib3000_seq[2][2][2] = /* fft,gua, inv */
102 { /* fft */
103 { /* gua */
104 { 0, 1 }, /* 0 0 { 0,1 } */
105 { 3, 9 }, /* 0 1 { 0,1 } */
106 },
107 {
108 { 2, 5 }, /* 1 0 { 0,1 } */
109 { 6, 11 }, /* 1 1 { 0,1 } */
110 }
111 };
112
113 static int dib3000mb_get_frontend(struct dvb_frontend* fe,
114 struct dtv_frontend_properties *c);
115
dib3000mb_set_frontend(struct dvb_frontend * fe,int tuner)116 static int dib3000mb_set_frontend(struct dvb_frontend *fe, int tuner)
117 {
118 struct dib3000_state* state = fe->demodulator_priv;
119 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
120 enum fe_code_rate fe_cr = FEC_NONE;
121 int search_state, seq;
122
123 if (tuner && fe->ops.tuner_ops.set_params) {
124 fe->ops.tuner_ops.set_params(fe);
125 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
126
127 switch (c->bandwidth_hz) {
128 case 8000000:
129 wr_foreach(dib3000mb_reg_timing_freq, dib3000mb_timing_freq[2]);
130 wr_foreach(dib3000mb_reg_bandwidth, dib3000mb_bandwidth_8mhz);
131 break;
132 case 7000000:
133 wr_foreach(dib3000mb_reg_timing_freq, dib3000mb_timing_freq[1]);
134 wr_foreach(dib3000mb_reg_bandwidth, dib3000mb_bandwidth_7mhz);
135 break;
136 case 6000000:
137 wr_foreach(dib3000mb_reg_timing_freq, dib3000mb_timing_freq[0]);
138 wr_foreach(dib3000mb_reg_bandwidth, dib3000mb_bandwidth_6mhz);
139 break;
140 case 0:
141 return -EOPNOTSUPP;
142 default:
143 pr_err("unknown bandwidth value.\n");
144 return -EINVAL;
145 }
146 deb_setf("bandwidth: %d MHZ\n", c->bandwidth_hz / 1000000);
147 }
148 wr(DIB3000MB_REG_LOCK1_MASK, DIB3000MB_LOCK1_SEARCH_4);
149
150 switch (c->transmission_mode) {
151 case TRANSMISSION_MODE_2K:
152 deb_setf("transmission mode: 2k\n");
153 wr(DIB3000MB_REG_FFT, DIB3000_TRANSMISSION_MODE_2K);
154 break;
155 case TRANSMISSION_MODE_8K:
156 deb_setf("transmission mode: 8k\n");
157 wr(DIB3000MB_REG_FFT, DIB3000_TRANSMISSION_MODE_8K);
158 break;
159 case TRANSMISSION_MODE_AUTO:
160 deb_setf("transmission mode: auto\n");
161 break;
162 default:
163 return -EINVAL;
164 }
165
166 switch (c->guard_interval) {
167 case GUARD_INTERVAL_1_32:
168 deb_setf("guard 1_32\n");
169 wr(DIB3000MB_REG_GUARD_TIME, DIB3000_GUARD_TIME_1_32);
170 break;
171 case GUARD_INTERVAL_1_16:
172 deb_setf("guard 1_16\n");
173 wr(DIB3000MB_REG_GUARD_TIME, DIB3000_GUARD_TIME_1_16);
174 break;
175 case GUARD_INTERVAL_1_8:
176 deb_setf("guard 1_8\n");
177 wr(DIB3000MB_REG_GUARD_TIME, DIB3000_GUARD_TIME_1_8);
178 break;
179 case GUARD_INTERVAL_1_4:
180 deb_setf("guard 1_4\n");
181 wr(DIB3000MB_REG_GUARD_TIME, DIB3000_GUARD_TIME_1_4);
182 break;
183 case GUARD_INTERVAL_AUTO:
184 deb_setf("guard auto\n");
185 break;
186 default:
187 return -EINVAL;
188 }
189
190 switch (c->inversion) {
191 case INVERSION_OFF:
192 deb_setf("inversion off\n");
193 wr(DIB3000MB_REG_DDS_INV, DIB3000_DDS_INVERSION_OFF);
194 break;
195 case INVERSION_AUTO:
196 deb_setf("inversion auto\n");
197 break;
198 case INVERSION_ON:
199 deb_setf("inversion on\n");
200 wr(DIB3000MB_REG_DDS_INV, DIB3000_DDS_INVERSION_ON);
201 break;
202 default:
203 return -EINVAL;
204 }
205
206 switch (c->modulation) {
207 case QPSK:
208 deb_setf("modulation: qpsk\n");
209 wr(DIB3000MB_REG_QAM, DIB3000_CONSTELLATION_QPSK);
210 break;
211 case QAM_16:
212 deb_setf("modulation: qam16\n");
213 wr(DIB3000MB_REG_QAM, DIB3000_CONSTELLATION_16QAM);
214 break;
215 case QAM_64:
216 deb_setf("modulation: qam64\n");
217 wr(DIB3000MB_REG_QAM, DIB3000_CONSTELLATION_64QAM);
218 break;
219 case QAM_AUTO:
220 break;
221 default:
222 return -EINVAL;
223 }
224 switch (c->hierarchy) {
225 case HIERARCHY_NONE:
226 deb_setf("hierarchy: none\n");
227 fallthrough;
228 case HIERARCHY_1:
229 deb_setf("hierarchy: alpha=1\n");
230 wr(DIB3000MB_REG_VIT_ALPHA, DIB3000_ALPHA_1);
231 break;
232 case HIERARCHY_2:
233 deb_setf("hierarchy: alpha=2\n");
234 wr(DIB3000MB_REG_VIT_ALPHA, DIB3000_ALPHA_2);
235 break;
236 case HIERARCHY_4:
237 deb_setf("hierarchy: alpha=4\n");
238 wr(DIB3000MB_REG_VIT_ALPHA, DIB3000_ALPHA_4);
239 break;
240 case HIERARCHY_AUTO:
241 deb_setf("hierarchy: alpha=auto\n");
242 break;
243 default:
244 return -EINVAL;
245 }
246
247 if (c->hierarchy == HIERARCHY_NONE) {
248 wr(DIB3000MB_REG_VIT_HRCH, DIB3000_HRCH_OFF);
249 wr(DIB3000MB_REG_VIT_HP, DIB3000_SELECT_HP);
250 fe_cr = c->code_rate_HP;
251 } else if (c->hierarchy != HIERARCHY_AUTO) {
252 wr(DIB3000MB_REG_VIT_HRCH, DIB3000_HRCH_ON);
253 wr(DIB3000MB_REG_VIT_HP, DIB3000_SELECT_LP);
254 fe_cr = c->code_rate_LP;
255 }
256 switch (fe_cr) {
257 case FEC_1_2:
258 deb_setf("fec: 1_2\n");
259 wr(DIB3000MB_REG_VIT_CODE_RATE, DIB3000_FEC_1_2);
260 break;
261 case FEC_2_3:
262 deb_setf("fec: 2_3\n");
263 wr(DIB3000MB_REG_VIT_CODE_RATE, DIB3000_FEC_2_3);
264 break;
265 case FEC_3_4:
266 deb_setf("fec: 3_4\n");
267 wr(DIB3000MB_REG_VIT_CODE_RATE, DIB3000_FEC_3_4);
268 break;
269 case FEC_5_6:
270 deb_setf("fec: 5_6\n");
271 wr(DIB3000MB_REG_VIT_CODE_RATE, DIB3000_FEC_5_6);
272 break;
273 case FEC_7_8:
274 deb_setf("fec: 7_8\n");
275 wr(DIB3000MB_REG_VIT_CODE_RATE, DIB3000_FEC_7_8);
276 break;
277 case FEC_NONE:
278 deb_setf("fec: none\n");
279 break;
280 case FEC_AUTO:
281 deb_setf("fec: auto\n");
282 break;
283 default:
284 return -EINVAL;
285 }
286
287 seq = dib3000_seq
288 [c->transmission_mode == TRANSMISSION_MODE_AUTO]
289 [c->guard_interval == GUARD_INTERVAL_AUTO]
290 [c->inversion == INVERSION_AUTO];
291
292 deb_setf("seq? %d\n", seq);
293
294 wr(DIB3000MB_REG_SEQ, seq);
295
296 wr(DIB3000MB_REG_ISI, seq ? DIB3000MB_ISI_INHIBIT : DIB3000MB_ISI_ACTIVATE);
297
298 if (c->transmission_mode == TRANSMISSION_MODE_2K) {
299 if (c->guard_interval == GUARD_INTERVAL_1_8) {
300 wr(DIB3000MB_REG_SYNC_IMPROVEMENT, DIB3000MB_SYNC_IMPROVE_2K_1_8);
301 } else {
302 wr(DIB3000MB_REG_SYNC_IMPROVEMENT, DIB3000MB_SYNC_IMPROVE_DEFAULT);
303 }
304
305 wr(DIB3000MB_REG_UNK_121, DIB3000MB_UNK_121_2K);
306 } else {
307 wr(DIB3000MB_REG_UNK_121, DIB3000MB_UNK_121_DEFAULT);
308 }
309
310 wr(DIB3000MB_REG_MOBILE_ALGO, DIB3000MB_MOBILE_ALGO_OFF);
311 wr(DIB3000MB_REG_MOBILE_MODE_QAM, DIB3000MB_MOBILE_MODE_QAM_OFF);
312 wr(DIB3000MB_REG_MOBILE_MODE, DIB3000MB_MOBILE_MODE_OFF);
313
314 wr_foreach(dib3000mb_reg_agc_bandwidth, dib3000mb_agc_bandwidth_high);
315
316 wr(DIB3000MB_REG_ISI, DIB3000MB_ISI_ACTIVATE);
317
318 wr(DIB3000MB_REG_RESTART, DIB3000MB_RESTART_AGC + DIB3000MB_RESTART_CTRL);
319 wr(DIB3000MB_REG_RESTART, DIB3000MB_RESTART_OFF);
320
321 /* wait for AGC lock */
322 msleep(70);
323
324 wr_foreach(dib3000mb_reg_agc_bandwidth, dib3000mb_agc_bandwidth_low);
325
326 /* something has to be auto searched */
327 if (c->modulation == QAM_AUTO ||
328 c->hierarchy == HIERARCHY_AUTO ||
329 fe_cr == FEC_AUTO ||
330 c->inversion == INVERSION_AUTO) {
331 int as_count=0;
332
333 deb_setf("autosearch enabled.\n");
334
335 wr(DIB3000MB_REG_ISI, DIB3000MB_ISI_INHIBIT);
336
337 wr(DIB3000MB_REG_RESTART, DIB3000MB_RESTART_AUTO_SEARCH);
338 wr(DIB3000MB_REG_RESTART, DIB3000MB_RESTART_OFF);
339
340 while ((search_state =
341 dib3000_search_status(
342 rd(DIB3000MB_REG_AS_IRQ_PENDING),
343 rd(DIB3000MB_REG_LOCK2_VALUE))) < 0 && as_count++ < 100)
344 msleep(1);
345
346 deb_setf("search_state after autosearch %d after %d checks\n",
347 search_state, as_count);
348
349 if (search_state == 1) {
350 if (dib3000mb_get_frontend(fe, c) == 0) {
351 deb_setf("reading tuning data from frontend succeeded.\n");
352 return dib3000mb_set_frontend(fe, 0);
353 }
354 }
355
356 } else {
357 wr(DIB3000MB_REG_RESTART, DIB3000MB_RESTART_CTRL);
358 wr(DIB3000MB_REG_RESTART, DIB3000MB_RESTART_OFF);
359 }
360
361 return 0;
362 }
363
dib3000mb_fe_init(struct dvb_frontend * fe,int mobile_mode)364 static int dib3000mb_fe_init(struct dvb_frontend* fe, int mobile_mode)
365 {
366 struct dib3000_state* state = fe->demodulator_priv;
367
368 deb_info("dib3000mb is getting up.\n");
369 wr(DIB3000MB_REG_POWER_CONTROL, DIB3000MB_POWER_UP);
370
371 wr(DIB3000MB_REG_RESTART, DIB3000MB_RESTART_AGC);
372
373 wr(DIB3000MB_REG_RESET_DEVICE, DIB3000MB_RESET_DEVICE);
374 wr(DIB3000MB_REG_RESET_DEVICE, DIB3000MB_RESET_DEVICE_RST);
375
376 wr(DIB3000MB_REG_CLOCK, DIB3000MB_CLOCK_DEFAULT);
377
378 wr(DIB3000MB_REG_ELECT_OUT_MODE, DIB3000MB_ELECT_OUT_MODE_ON);
379
380 wr(DIB3000MB_REG_DDS_FREQ_MSB, DIB3000MB_DDS_FREQ_MSB);
381 wr(DIB3000MB_REG_DDS_FREQ_LSB, DIB3000MB_DDS_FREQ_LSB);
382
383 wr_foreach(dib3000mb_reg_timing_freq, dib3000mb_timing_freq[2]);
384
385 wr_foreach(dib3000mb_reg_impulse_noise,
386 dib3000mb_impulse_noise_values[DIB3000MB_IMPNOISE_OFF]);
387
388 wr_foreach(dib3000mb_reg_agc_gain, dib3000mb_default_agc_gain);
389
390 wr(DIB3000MB_REG_PHASE_NOISE, DIB3000MB_PHASE_NOISE_DEFAULT);
391
392 wr_foreach(dib3000mb_reg_phase_noise, dib3000mb_default_noise_phase);
393
394 wr_foreach(dib3000mb_reg_lock_duration, dib3000mb_default_lock_duration);
395
396 wr_foreach(dib3000mb_reg_agc_bandwidth, dib3000mb_agc_bandwidth_low);
397
398 wr(DIB3000MB_REG_LOCK0_MASK, DIB3000MB_LOCK0_DEFAULT);
399 wr(DIB3000MB_REG_LOCK1_MASK, DIB3000MB_LOCK1_SEARCH_4);
400 wr(DIB3000MB_REG_LOCK2_MASK, DIB3000MB_LOCK2_DEFAULT);
401 wr(DIB3000MB_REG_SEQ, dib3000_seq[1][1][1]);
402
403 wr_foreach(dib3000mb_reg_bandwidth, dib3000mb_bandwidth_8mhz);
404
405 wr(DIB3000MB_REG_UNK_68, DIB3000MB_UNK_68);
406 wr(DIB3000MB_REG_UNK_69, DIB3000MB_UNK_69);
407 wr(DIB3000MB_REG_UNK_71, DIB3000MB_UNK_71);
408 wr(DIB3000MB_REG_UNK_77, DIB3000MB_UNK_77);
409 wr(DIB3000MB_REG_UNK_78, DIB3000MB_UNK_78);
410 wr(DIB3000MB_REG_ISI, DIB3000MB_ISI_INHIBIT);
411 wr(DIB3000MB_REG_UNK_92, DIB3000MB_UNK_92);
412 wr(DIB3000MB_REG_UNK_96, DIB3000MB_UNK_96);
413 wr(DIB3000MB_REG_UNK_97, DIB3000MB_UNK_97);
414 wr(DIB3000MB_REG_UNK_106, DIB3000MB_UNK_106);
415 wr(DIB3000MB_REG_UNK_107, DIB3000MB_UNK_107);
416 wr(DIB3000MB_REG_UNK_108, DIB3000MB_UNK_108);
417 wr(DIB3000MB_REG_UNK_122, DIB3000MB_UNK_122);
418 wr(DIB3000MB_REG_MOBILE_MODE_QAM, DIB3000MB_MOBILE_MODE_QAM_OFF);
419 wr(DIB3000MB_REG_BERLEN, DIB3000MB_BERLEN_DEFAULT);
420
421 wr_foreach(dib3000mb_reg_filter_coeffs, dib3000mb_filter_coeffs);
422
423 wr(DIB3000MB_REG_MOBILE_ALGO, DIB3000MB_MOBILE_ALGO_ON);
424 wr(DIB3000MB_REG_MULTI_DEMOD_MSB, DIB3000MB_MULTI_DEMOD_MSB);
425 wr(DIB3000MB_REG_MULTI_DEMOD_LSB, DIB3000MB_MULTI_DEMOD_LSB);
426
427 wr(DIB3000MB_REG_OUTPUT_MODE, DIB3000MB_OUTPUT_MODE_SLAVE);
428
429 wr(DIB3000MB_REG_FIFO_142, DIB3000MB_FIFO_142);
430 wr(DIB3000MB_REG_MPEG2_OUT_MODE, DIB3000MB_MPEG2_OUT_MODE_188);
431 wr(DIB3000MB_REG_PID_PARSE, DIB3000MB_PID_PARSE_ACTIVATE);
432 wr(DIB3000MB_REG_FIFO, DIB3000MB_FIFO_INHIBIT);
433 wr(DIB3000MB_REG_FIFO_146, DIB3000MB_FIFO_146);
434 wr(DIB3000MB_REG_FIFO_147, DIB3000MB_FIFO_147);
435
436 wr(DIB3000MB_REG_DATA_IN_DIVERSITY, DIB3000MB_DATA_DIVERSITY_IN_OFF);
437
438 return 0;
439 }
440
dib3000mb_get_frontend(struct dvb_frontend * fe,struct dtv_frontend_properties * c)441 static int dib3000mb_get_frontend(struct dvb_frontend* fe,
442 struct dtv_frontend_properties *c)
443 {
444 struct dib3000_state* state = fe->demodulator_priv;
445 enum fe_code_rate *cr;
446 u16 tps_val;
447 int inv_test1,inv_test2;
448 u32 dds_val, threshold = 0x800000;
449
450 if (!rd(DIB3000MB_REG_TPS_LOCK))
451 return 0;
452
453 dds_val = ((rd(DIB3000MB_REG_DDS_VALUE_MSB) & 0xff) << 16) + rd(DIB3000MB_REG_DDS_VALUE_LSB);
454 deb_getf("DDS_VAL: %x %x %x\n", dds_val, rd(DIB3000MB_REG_DDS_VALUE_MSB), rd(DIB3000MB_REG_DDS_VALUE_LSB));
455 if (dds_val < threshold)
456 inv_test1 = 0;
457 else if (dds_val == threshold)
458 inv_test1 = 1;
459 else
460 inv_test1 = 2;
461
462 dds_val = ((rd(DIB3000MB_REG_DDS_FREQ_MSB) & 0xff) << 16) + rd(DIB3000MB_REG_DDS_FREQ_LSB);
463 deb_getf("DDS_FREQ: %x %x %x\n", dds_val, rd(DIB3000MB_REG_DDS_FREQ_MSB), rd(DIB3000MB_REG_DDS_FREQ_LSB));
464 if (dds_val < threshold)
465 inv_test2 = 0;
466 else if (dds_val == threshold)
467 inv_test2 = 1;
468 else
469 inv_test2 = 2;
470
471 c->inversion =
472 ((inv_test2 == 2) && (inv_test1==1 || inv_test1==0)) ||
473 ((inv_test2 == 0) && (inv_test1==1 || inv_test1==2)) ?
474 INVERSION_ON : INVERSION_OFF;
475
476 deb_getf("inversion %d %d, %d\n", inv_test2, inv_test1, c->inversion);
477
478 switch ((tps_val = rd(DIB3000MB_REG_TPS_QAM))) {
479 case DIB3000_CONSTELLATION_QPSK:
480 deb_getf("QPSK\n");
481 c->modulation = QPSK;
482 break;
483 case DIB3000_CONSTELLATION_16QAM:
484 deb_getf("QAM16\n");
485 c->modulation = QAM_16;
486 break;
487 case DIB3000_CONSTELLATION_64QAM:
488 deb_getf("QAM64\n");
489 c->modulation = QAM_64;
490 break;
491 default:
492 pr_err("Unexpected constellation returned by TPS (%d)\n", tps_val);
493 break;
494 }
495 deb_getf("TPS: %d\n", tps_val);
496
497 if (rd(DIB3000MB_REG_TPS_HRCH)) {
498 deb_getf("HRCH ON\n");
499 cr = &c->code_rate_LP;
500 c->code_rate_HP = FEC_NONE;
501 switch ((tps_val = rd(DIB3000MB_REG_TPS_VIT_ALPHA))) {
502 case DIB3000_ALPHA_0:
503 deb_getf("HIERARCHY_NONE\n");
504 c->hierarchy = HIERARCHY_NONE;
505 break;
506 case DIB3000_ALPHA_1:
507 deb_getf("HIERARCHY_1\n");
508 c->hierarchy = HIERARCHY_1;
509 break;
510 case DIB3000_ALPHA_2:
511 deb_getf("HIERARCHY_2\n");
512 c->hierarchy = HIERARCHY_2;
513 break;
514 case DIB3000_ALPHA_4:
515 deb_getf("HIERARCHY_4\n");
516 c->hierarchy = HIERARCHY_4;
517 break;
518 default:
519 pr_err("Unexpected ALPHA value returned by TPS (%d)\n", tps_val);
520 break;
521 }
522 deb_getf("TPS: %d\n", tps_val);
523
524 tps_val = rd(DIB3000MB_REG_TPS_CODE_RATE_LP);
525 } else {
526 deb_getf("HRCH OFF\n");
527 cr = &c->code_rate_HP;
528 c->code_rate_LP = FEC_NONE;
529 c->hierarchy = HIERARCHY_NONE;
530
531 tps_val = rd(DIB3000MB_REG_TPS_CODE_RATE_HP);
532 }
533
534 switch (tps_val) {
535 case DIB3000_FEC_1_2:
536 deb_getf("FEC_1_2\n");
537 *cr = FEC_1_2;
538 break;
539 case DIB3000_FEC_2_3:
540 deb_getf("FEC_2_3\n");
541 *cr = FEC_2_3;
542 break;
543 case DIB3000_FEC_3_4:
544 deb_getf("FEC_3_4\n");
545 *cr = FEC_3_4;
546 break;
547 case DIB3000_FEC_5_6:
548 deb_getf("FEC_5_6\n");
549 *cr = FEC_4_5;
550 break;
551 case DIB3000_FEC_7_8:
552 deb_getf("FEC_7_8\n");
553 *cr = FEC_7_8;
554 break;
555 default:
556 pr_err("Unexpected FEC returned by TPS (%d)\n", tps_val);
557 break;
558 }
559 deb_getf("TPS: %d\n",tps_val);
560
561 switch ((tps_val = rd(DIB3000MB_REG_TPS_GUARD_TIME))) {
562 case DIB3000_GUARD_TIME_1_32:
563 deb_getf("GUARD_INTERVAL_1_32\n");
564 c->guard_interval = GUARD_INTERVAL_1_32;
565 break;
566 case DIB3000_GUARD_TIME_1_16:
567 deb_getf("GUARD_INTERVAL_1_16\n");
568 c->guard_interval = GUARD_INTERVAL_1_16;
569 break;
570 case DIB3000_GUARD_TIME_1_8:
571 deb_getf("GUARD_INTERVAL_1_8\n");
572 c->guard_interval = GUARD_INTERVAL_1_8;
573 break;
574 case DIB3000_GUARD_TIME_1_4:
575 deb_getf("GUARD_INTERVAL_1_4\n");
576 c->guard_interval = GUARD_INTERVAL_1_4;
577 break;
578 default:
579 pr_err("Unexpected Guard Time returned by TPS (%d)\n", tps_val);
580 break;
581 }
582 deb_getf("TPS: %d\n", tps_val);
583
584 switch ((tps_val = rd(DIB3000MB_REG_TPS_FFT))) {
585 case DIB3000_TRANSMISSION_MODE_2K:
586 deb_getf("TRANSMISSION_MODE_2K\n");
587 c->transmission_mode = TRANSMISSION_MODE_2K;
588 break;
589 case DIB3000_TRANSMISSION_MODE_8K:
590 deb_getf("TRANSMISSION_MODE_8K\n");
591 c->transmission_mode = TRANSMISSION_MODE_8K;
592 break;
593 default:
594 pr_err("unexpected transmission mode return by TPS (%d)\n", tps_val);
595 break;
596 }
597 deb_getf("TPS: %d\n", tps_val);
598
599 return 0;
600 }
601
dib3000mb_read_status(struct dvb_frontend * fe,enum fe_status * stat)602 static int dib3000mb_read_status(struct dvb_frontend *fe,
603 enum fe_status *stat)
604 {
605 struct dib3000_state* state = fe->demodulator_priv;
606
607 *stat = 0;
608
609 if (rd(DIB3000MB_REG_AGC_LOCK))
610 *stat |= FE_HAS_SIGNAL;
611 if (rd(DIB3000MB_REG_CARRIER_LOCK))
612 *stat |= FE_HAS_CARRIER;
613 if (rd(DIB3000MB_REG_VIT_LCK))
614 *stat |= FE_HAS_VITERBI;
615 if (rd(DIB3000MB_REG_TS_SYNC_LOCK))
616 *stat |= (FE_HAS_SYNC | FE_HAS_LOCK);
617
618 deb_getf("actual status is %2x\n",*stat);
619
620 deb_getf("autoval: tps: %d, qam: %d, hrch: %d, alpha: %d, hp: %d, lp: %d, guard: %d, fft: %d cell: %d\n",
621 rd(DIB3000MB_REG_TPS_LOCK),
622 rd(DIB3000MB_REG_TPS_QAM),
623 rd(DIB3000MB_REG_TPS_HRCH),
624 rd(DIB3000MB_REG_TPS_VIT_ALPHA),
625 rd(DIB3000MB_REG_TPS_CODE_RATE_HP),
626 rd(DIB3000MB_REG_TPS_CODE_RATE_LP),
627 rd(DIB3000MB_REG_TPS_GUARD_TIME),
628 rd(DIB3000MB_REG_TPS_FFT),
629 rd(DIB3000MB_REG_TPS_CELL_ID));
630
631 //*stat = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
632 return 0;
633 }
634
dib3000mb_read_ber(struct dvb_frontend * fe,u32 * ber)635 static int dib3000mb_read_ber(struct dvb_frontend* fe, u32 *ber)
636 {
637 struct dib3000_state* state = fe->demodulator_priv;
638
639 *ber = ((rd(DIB3000MB_REG_BER_MSB) << 16) | rd(DIB3000MB_REG_BER_LSB));
640 return 0;
641 }
642
643 /* see dib3000-watch dvb-apps for exact calcuations of signal_strength and snr */
dib3000mb_read_signal_strength(struct dvb_frontend * fe,u16 * strength)644 static int dib3000mb_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
645 {
646 struct dib3000_state* state = fe->demodulator_priv;
647
648 *strength = rd(DIB3000MB_REG_SIGNAL_POWER) * 0xffff / 0x170;
649 return 0;
650 }
651
dib3000mb_read_snr(struct dvb_frontend * fe,u16 * snr)652 static int dib3000mb_read_snr(struct dvb_frontend* fe, u16 *snr)
653 {
654 struct dib3000_state* state = fe->demodulator_priv;
655 short sigpow = rd(DIB3000MB_REG_SIGNAL_POWER);
656 int icipow = ((rd(DIB3000MB_REG_NOISE_POWER_MSB) & 0xff) << 16) |
657 rd(DIB3000MB_REG_NOISE_POWER_LSB);
658 *snr = (sigpow << 8) / ((icipow > 0) ? icipow : 1);
659 return 0;
660 }
661
dib3000mb_read_unc_blocks(struct dvb_frontend * fe,u32 * unc)662 static int dib3000mb_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
663 {
664 struct dib3000_state* state = fe->demodulator_priv;
665
666 *unc = rd(DIB3000MB_REG_PACKET_ERROR_RATE);
667 return 0;
668 }
669
dib3000mb_sleep(struct dvb_frontend * fe)670 static int dib3000mb_sleep(struct dvb_frontend* fe)
671 {
672 struct dib3000_state* state = fe->demodulator_priv;
673 deb_info("dib3000mb is going to bed.\n");
674 wr(DIB3000MB_REG_POWER_CONTROL, DIB3000MB_POWER_DOWN);
675 return 0;
676 }
677
dib3000mb_fe_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * tune)678 static int dib3000mb_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
679 {
680 tune->min_delay_ms = 800;
681 return 0;
682 }
683
dib3000mb_fe_init_nonmobile(struct dvb_frontend * fe)684 static int dib3000mb_fe_init_nonmobile(struct dvb_frontend* fe)
685 {
686 return dib3000mb_fe_init(fe, 0);
687 }
688
dib3000mb_set_frontend_and_tuner(struct dvb_frontend * fe)689 static int dib3000mb_set_frontend_and_tuner(struct dvb_frontend *fe)
690 {
691 return dib3000mb_set_frontend(fe, 1);
692 }
693
dib3000mb_release(struct dvb_frontend * fe)694 static void dib3000mb_release(struct dvb_frontend* fe)
695 {
696 struct dib3000_state *state = fe->demodulator_priv;
697 kfree(state);
698 }
699
700 /* pid filter and transfer stuff */
dib3000mb_pid_control(struct dvb_frontend * fe,int index,int pid,int onoff)701 static int dib3000mb_pid_control(struct dvb_frontend *fe,int index, int pid,int onoff)
702 {
703 struct dib3000_state *state = fe->demodulator_priv;
704 pid = (onoff ? pid | DIB3000_ACTIVATE_PID_FILTERING : 0);
705 wr(index+DIB3000MB_REG_FIRST_PID,pid);
706 return 0;
707 }
708
dib3000mb_fifo_control(struct dvb_frontend * fe,int onoff)709 static int dib3000mb_fifo_control(struct dvb_frontend *fe, int onoff)
710 {
711 struct dib3000_state *state = fe->demodulator_priv;
712
713 deb_xfer("%s fifo\n",onoff ? "enabling" : "disabling");
714 if (onoff) {
715 wr(DIB3000MB_REG_FIFO, DIB3000MB_FIFO_ACTIVATE);
716 } else {
717 wr(DIB3000MB_REG_FIFO, DIB3000MB_FIFO_INHIBIT);
718 }
719 return 0;
720 }
721
dib3000mb_pid_parse(struct dvb_frontend * fe,int onoff)722 static int dib3000mb_pid_parse(struct dvb_frontend *fe, int onoff)
723 {
724 struct dib3000_state *state = fe->demodulator_priv;
725 deb_xfer("%s pid parsing\n",onoff ? "enabling" : "disabling");
726 wr(DIB3000MB_REG_PID_PARSE,onoff);
727 return 0;
728 }
729
dib3000mb_tuner_pass_ctrl(struct dvb_frontend * fe,int onoff,u8 pll_addr)730 static int dib3000mb_tuner_pass_ctrl(struct dvb_frontend *fe, int onoff, u8 pll_addr)
731 {
732 struct dib3000_state *state = fe->demodulator_priv;
733 if (onoff) {
734 wr(DIB3000MB_REG_TUNER, DIB3000_TUNER_WRITE_ENABLE(pll_addr));
735 } else {
736 wr(DIB3000MB_REG_TUNER, DIB3000_TUNER_WRITE_DISABLE(pll_addr));
737 }
738 return 0;
739 }
740
741 static const struct dvb_frontend_ops dib3000mb_ops;
742
dib3000mb_attach(const struct dib3000_config * config,struct i2c_adapter * i2c,struct dib_fe_xfer_ops * xfer_ops)743 struct dvb_frontend* dib3000mb_attach(const struct dib3000_config* config,
744 struct i2c_adapter* i2c, struct dib_fe_xfer_ops *xfer_ops)
745 {
746 struct dib3000_state* state = NULL;
747
748 /* allocate memory for the internal state */
749 state = kzalloc(sizeof(struct dib3000_state), GFP_KERNEL);
750 if (state == NULL)
751 goto error;
752
753 /* setup the state */
754 state->i2c = i2c;
755 memcpy(&state->config,config,sizeof(struct dib3000_config));
756
757 /* check for the correct demod */
758 if (rd(DIB3000_REG_MANUFACTOR_ID) != DIB3000_I2C_ID_DIBCOM)
759 goto error;
760
761 if (rd(DIB3000_REG_DEVICE_ID) != DIB3000MB_DEVICE_ID)
762 goto error;
763
764 /* create dvb_frontend */
765 memcpy(&state->frontend.ops, &dib3000mb_ops, sizeof(struct dvb_frontend_ops));
766 state->frontend.demodulator_priv = state;
767
768 /* set the xfer operations */
769 xfer_ops->pid_parse = dib3000mb_pid_parse;
770 xfer_ops->fifo_ctrl = dib3000mb_fifo_control;
771 xfer_ops->pid_ctrl = dib3000mb_pid_control;
772 xfer_ops->tuner_pass_ctrl = dib3000mb_tuner_pass_ctrl;
773
774 return &state->frontend;
775
776 error:
777 kfree(state);
778 return NULL;
779 }
780
781 static const struct dvb_frontend_ops dib3000mb_ops = {
782 .delsys = { SYS_DVBT },
783 .info = {
784 .name = "DiBcom 3000M-B DVB-T",
785 .frequency_min_hz = 44250 * kHz,
786 .frequency_max_hz = 867250 * kHz,
787 .frequency_stepsize_hz = 62500,
788 .caps = FE_CAN_INVERSION_AUTO |
789 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
790 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
791 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
792 FE_CAN_TRANSMISSION_MODE_AUTO |
793 FE_CAN_GUARD_INTERVAL_AUTO |
794 FE_CAN_RECOVER |
795 FE_CAN_HIERARCHY_AUTO,
796 },
797
798 .release = dib3000mb_release,
799
800 .init = dib3000mb_fe_init_nonmobile,
801 .sleep = dib3000mb_sleep,
802
803 .set_frontend = dib3000mb_set_frontend_and_tuner,
804 .get_frontend = dib3000mb_get_frontend,
805 .get_tune_settings = dib3000mb_fe_get_tune_settings,
806
807 .read_status = dib3000mb_read_status,
808 .read_ber = dib3000mb_read_ber,
809 .read_signal_strength = dib3000mb_read_signal_strength,
810 .read_snr = dib3000mb_read_snr,
811 .read_ucblocks = dib3000mb_read_unc_blocks,
812 };
813
814 MODULE_AUTHOR(DRIVER_AUTHOR);
815 MODULE_DESCRIPTION(DRIVER_DESC);
816 MODULE_LICENSE("GPL");
817
818 EXPORT_SYMBOL_GPL(dib3000mb_attach);
819