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 
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 
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 
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 
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 			/* fall through */
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 
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 
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 
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 
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 */
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 
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 
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 
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 
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 
684 static int dib3000mb_fe_init_nonmobile(struct dvb_frontend* fe)
685 {
686 	return dib3000mb_fe_init(fe, 0);
687 }
688 
689 static int dib3000mb_set_frontend_and_tuner(struct dvb_frontend *fe)
690 {
691 	return dib3000mb_set_frontend(fe, 1);
692 }
693 
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 */
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 
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 
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 
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 
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(dib3000mb_attach);
819