1 /*
2     Driver for ST STV0299 demodulator
3 
4     Copyright (C) 2001-2002 Convergence Integrated Media GmbH
5 	<ralph@convergence.de>,
6 	<holger@convergence.de>,
7 	<js@convergence.de>
8 
9 
10     Philips SU1278/SH
11 
12     Copyright (C) 2002 by Peter Schildmann <peter.schildmann@web.de>
13 
14 
15     LG TDQF-S001F
16 
17     Copyright (C) 2002 Felix Domke <tmbinc@elitedvb.net>
18 		     & Andreas Oberritter <obi@linuxtv.org>
19 
20 
21     Support for Samsung TBMU24112IMB used on Technisat SkyStar2 rev. 2.6B
22 
23     Copyright (C) 2003 Vadim Catana <skystar@moldova.cc>:
24 
25     Support for Philips SU1278 on Technotrend hardware
26 
27     Copyright (C) 2004 Andrew de Quincey <adq_dvb@lidskialf.net>
28 
29     This program is free software; you can redistribute it and/or modify
30     it under the terms of the GNU General Public License as published by
31     the Free Software Foundation; either version 2 of the License, or
32     (at your option) any later version.
33 
34     This program is distributed in the hope that it will be useful,
35     but WITHOUT ANY WARRANTY; without even the implied warranty of
36     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
37     GNU General Public License for more details.
38 
39     You should have received a copy of the GNU General Public License
40     along with this program; if not, write to the Free Software
41     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
42 
43 */
44 
45 #include <linux/init.h>
46 #include <linux/kernel.h>
47 #include <linux/module.h>
48 #include <linux/string.h>
49 #include <linux/slab.h>
50 #include <linux/jiffies.h>
51 #include <asm/div64.h>
52 
53 #include "dvb_frontend.h"
54 #include "stv0299.h"
55 
56 struct stv0299_state {
57 	struct i2c_adapter* i2c;
58 	const struct stv0299_config* config;
59 	struct dvb_frontend frontend;
60 
61 	u8 initialised:1;
62 	u32 tuner_frequency;
63 	u32 symbol_rate;
64 	fe_code_rate_t fec_inner;
65 	int errmode;
66 	u32 ucblocks;
67 	u8 mcr_reg;
68 };
69 
70 #define STATUS_BER 0
71 #define STATUS_UCBLOCKS 1
72 
73 static int debug;
74 static int debug_legacy_dish_switch;
75 #define dprintk(args...) \
76 	do { \
77 		if (debug) printk(KERN_DEBUG "stv0299: " args); \
78 	} while (0)
79 
80 
81 static int stv0299_writeregI (struct stv0299_state* state, u8 reg, u8 data)
82 {
83 	int ret;
84 	u8 buf [] = { reg, data };
85 	struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
86 
87 	ret = i2c_transfer (state->i2c, &msg, 1);
88 
89 	if (ret != 1)
90 		dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, "
91 			"ret == %i)\n", __func__, reg, data, ret);
92 
93 	return (ret != 1) ? -EREMOTEIO : 0;
94 }
95 
96 static int stv0299_write(struct dvb_frontend* fe, const u8 buf[], int len)
97 {
98 	struct stv0299_state* state = fe->demodulator_priv;
99 
100 	if (len != 2)
101 		return -EINVAL;
102 
103 	return stv0299_writeregI(state, buf[0], buf[1]);
104 }
105 
106 static u8 stv0299_readreg (struct stv0299_state* state, u8 reg)
107 {
108 	int ret;
109 	u8 b0 [] = { reg };
110 	u8 b1 [] = { 0 };
111 	struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
112 			   { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
113 
114 	ret = i2c_transfer (state->i2c, msg, 2);
115 
116 	if (ret != 2)
117 		dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
118 				__func__, reg, ret);
119 
120 	return b1[0];
121 }
122 
123 static int stv0299_readregs (struct stv0299_state* state, u8 reg1, u8 *b, u8 len)
124 {
125 	int ret;
126 	struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = &reg1, .len = 1 },
127 			   { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
128 
129 	ret = i2c_transfer (state->i2c, msg, 2);
130 
131 	if (ret != 2)
132 		dprintk("%s: readreg error (ret == %i)\n", __func__, ret);
133 
134 	return ret == 2 ? 0 : ret;
135 }
136 
137 static int stv0299_set_FEC (struct stv0299_state* state, fe_code_rate_t fec)
138 {
139 	dprintk ("%s\n", __func__);
140 
141 	switch (fec) {
142 	case FEC_AUTO:
143 	{
144 		return stv0299_writeregI (state, 0x31, 0x1f);
145 	}
146 	case FEC_1_2:
147 	{
148 		return stv0299_writeregI (state, 0x31, 0x01);
149 	}
150 	case FEC_2_3:
151 	{
152 		return stv0299_writeregI (state, 0x31, 0x02);
153 	}
154 	case FEC_3_4:
155 	{
156 		return stv0299_writeregI (state, 0x31, 0x04);
157 	}
158 	case FEC_5_6:
159 	{
160 		return stv0299_writeregI (state, 0x31, 0x08);
161 	}
162 	case FEC_7_8:
163 	{
164 		return stv0299_writeregI (state, 0x31, 0x10);
165 	}
166 	default:
167 	{
168 		return -EINVAL;
169 	}
170     }
171 }
172 
173 static fe_code_rate_t stv0299_get_fec (struct stv0299_state* state)
174 {
175 	static fe_code_rate_t fec_tab [] = { FEC_2_3, FEC_3_4, FEC_5_6,
176 					     FEC_7_8, FEC_1_2 };
177 	u8 index;
178 
179 	dprintk ("%s\n", __func__);
180 
181 	index = stv0299_readreg (state, 0x1b);
182 	index &= 0x7;
183 
184 	if (index > 4)
185 		return FEC_AUTO;
186 
187 	return fec_tab [index];
188 }
189 
190 static int stv0299_wait_diseqc_fifo (struct stv0299_state* state, int timeout)
191 {
192 	unsigned long start = jiffies;
193 
194 	dprintk ("%s\n", __func__);
195 
196 	while (stv0299_readreg(state, 0x0a) & 1) {
197 		if (jiffies - start > timeout) {
198 			dprintk ("%s: timeout!!\n", __func__);
199 			return -ETIMEDOUT;
200 		}
201 		msleep(10);
202 	}
203 
204 	return 0;
205 }
206 
207 static int stv0299_wait_diseqc_idle (struct stv0299_state* state, int timeout)
208 {
209 	unsigned long start = jiffies;
210 
211 	dprintk ("%s\n", __func__);
212 
213 	while ((stv0299_readreg(state, 0x0a) & 3) != 2 ) {
214 		if (jiffies - start > timeout) {
215 			dprintk ("%s: timeout!!\n", __func__);
216 			return -ETIMEDOUT;
217 		}
218 		msleep(10);
219 	}
220 
221 	return 0;
222 }
223 
224 static int stv0299_set_symbolrate (struct dvb_frontend* fe, u32 srate)
225 {
226 	struct stv0299_state* state = fe->demodulator_priv;
227 	u64 big = srate;
228 	u32 ratio;
229 
230 	// check rate is within limits
231 	if ((srate < 1000000) || (srate > 45000000)) return -EINVAL;
232 
233 	// calculate value to program
234 	big = big << 20;
235 	big += (state->config->mclk-1); // round correctly
236 	do_div(big, state->config->mclk);
237 	ratio = big << 4;
238 
239 	return state->config->set_symbol_rate(fe, srate, ratio);
240 }
241 
242 static int stv0299_get_symbolrate (struct stv0299_state* state)
243 {
244 	u32 Mclk = state->config->mclk / 4096L;
245 	u32 srate;
246 	s32 offset;
247 	u8 sfr[3];
248 	s8 rtf;
249 
250 	dprintk ("%s\n", __func__);
251 
252 	stv0299_readregs (state, 0x1f, sfr, 3);
253 	stv0299_readregs (state, 0x1a, (u8 *)&rtf, 1);
254 
255 	srate = (sfr[0] << 8) | sfr[1];
256 	srate *= Mclk;
257 	srate /= 16;
258 	srate += (sfr[2] >> 4) * Mclk / 256;
259 	offset = (s32) rtf * (srate / 4096L);
260 	offset /= 128;
261 
262 	dprintk ("%s : srate = %i\n", __func__, srate);
263 	dprintk ("%s : ofset = %i\n", __func__, offset);
264 
265 	srate += offset;
266 
267 	srate += 1000;
268 	srate /= 2000;
269 	srate *= 2000;
270 
271 	return srate;
272 }
273 
274 static int stv0299_send_diseqc_msg (struct dvb_frontend* fe,
275 				    struct dvb_diseqc_master_cmd *m)
276 {
277 	struct stv0299_state* state = fe->demodulator_priv;
278 	u8 val;
279 	int i;
280 
281 	dprintk ("%s\n", __func__);
282 
283 	if (stv0299_wait_diseqc_idle (state, 100) < 0)
284 		return -ETIMEDOUT;
285 
286 	val = stv0299_readreg (state, 0x08);
287 
288 	if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x6))  /* DiSEqC mode */
289 		return -EREMOTEIO;
290 
291 	for (i=0; i<m->msg_len; i++) {
292 		if (stv0299_wait_diseqc_fifo (state, 100) < 0)
293 			return -ETIMEDOUT;
294 
295 		if (stv0299_writeregI (state, 0x09, m->msg[i]))
296 			return -EREMOTEIO;
297 	}
298 
299 	if (stv0299_wait_diseqc_idle (state, 100) < 0)
300 		return -ETIMEDOUT;
301 
302 	return 0;
303 }
304 
305 static int stv0299_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
306 {
307 	struct stv0299_state* state = fe->demodulator_priv;
308 	u8 val;
309 
310 	dprintk ("%s\n", __func__);
311 
312 	if (stv0299_wait_diseqc_idle (state, 100) < 0)
313 		return -ETIMEDOUT;
314 
315 	val = stv0299_readreg (state, 0x08);
316 
317 	if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x2))	/* burst mode */
318 		return -EREMOTEIO;
319 
320 	if (stv0299_writeregI (state, 0x09, burst == SEC_MINI_A ? 0x00 : 0xff))
321 		return -EREMOTEIO;
322 
323 	if (stv0299_wait_diseqc_idle (state, 100) < 0)
324 		return -ETIMEDOUT;
325 
326 	if (stv0299_writeregI (state, 0x08, val))
327 		return -EREMOTEIO;
328 
329 	return 0;
330 }
331 
332 static int stv0299_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
333 {
334 	struct stv0299_state* state = fe->demodulator_priv;
335 	u8 val;
336 
337 	if (stv0299_wait_diseqc_idle (state, 100) < 0)
338 		return -ETIMEDOUT;
339 
340 	val = stv0299_readreg (state, 0x08);
341 
342 	switch (tone) {
343 	case SEC_TONE_ON:
344 		return stv0299_writeregI (state, 0x08, val | 0x3);
345 
346 	case SEC_TONE_OFF:
347 		return stv0299_writeregI (state, 0x08, (val & ~0x3) | 0x02);
348 
349 	default:
350 		return -EINVAL;
351 	}
352 }
353 
354 static int stv0299_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
355 {
356 	struct stv0299_state* state = fe->demodulator_priv;
357 	u8 reg0x08;
358 	u8 reg0x0c;
359 
360 	dprintk("%s: %s\n", __func__,
361 		voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
362 		voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
363 
364 	reg0x08 = stv0299_readreg (state, 0x08);
365 	reg0x0c = stv0299_readreg (state, 0x0c);
366 
367 	/**
368 	 *  H/V switching over OP0, OP1 and OP2 are LNB power enable bits
369 	 */
370 	reg0x0c &= 0x0f;
371 	reg0x08 = (reg0x08 & 0x3f) | (state->config->lock_output << 6);
372 
373 	switch (voltage) {
374 	case SEC_VOLTAGE_13:
375 		if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
376 			reg0x0c |= 0x10; /* OP1 off, OP0 on */
377 		else
378 			reg0x0c |= 0x40; /* OP1 on, OP0 off */
379 		break;
380 	case SEC_VOLTAGE_18:
381 		reg0x0c |= 0x50; /* OP1 on, OP0 on */
382 		break;
383 	case SEC_VOLTAGE_OFF:
384 		/* LNB power off! */
385 		reg0x08 = 0x00;
386 		reg0x0c = 0x00;
387 		break;
388 	default:
389 		return -EINVAL;
390 	}
391 
392 	if (state->config->op0_off)
393 		reg0x0c &= ~0x10;
394 
395 	stv0299_writeregI(state, 0x08, reg0x08);
396 	return stv0299_writeregI(state, 0x0c, reg0x0c);
397 }
398 
399 static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd)
400 {
401 	struct stv0299_state* state = fe->demodulator_priv;
402 	u8 reg0x08;
403 	u8 reg0x0c;
404 	u8 lv_mask = 0x40;
405 	u8 last = 1;
406 	int i;
407 	struct timeval nexttime;
408 	struct timeval tv[10];
409 
410 	reg0x08 = stv0299_readreg (state, 0x08);
411 	reg0x0c = stv0299_readreg (state, 0x0c);
412 	reg0x0c &= 0x0f;
413 	stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
414 	if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
415 		lv_mask = 0x10;
416 
417 	cmd = cmd << 1;
418 	if (debug_legacy_dish_switch)
419 		printk ("%s switch command: 0x%04lx\n",__func__, cmd);
420 
421 	do_gettimeofday (&nexttime);
422 	if (debug_legacy_dish_switch)
423 		tv[0] = nexttime;
424 	stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */
425 
426 	dvb_frontend_sleep_until(&nexttime, 32000);
427 
428 	for (i=0; i<9; i++) {
429 		if (debug_legacy_dish_switch)
430 			do_gettimeofday (&tv[i+1]);
431 		if((cmd & 0x01) != last) {
432 			/* set voltage to (last ? 13V : 18V) */
433 			stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
434 			last = (last) ? 0 : 1;
435 		}
436 
437 		cmd = cmd >> 1;
438 
439 		if (i != 8)
440 			dvb_frontend_sleep_until(&nexttime, 8000);
441 	}
442 	if (debug_legacy_dish_switch) {
443 		printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
444 			__func__, fe->dvb->num);
445 		for (i = 1; i < 10; i++)
446 			printk ("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
447 	}
448 
449 	return 0;
450 }
451 
452 static int stv0299_init (struct dvb_frontend* fe)
453 {
454 	struct stv0299_state* state = fe->demodulator_priv;
455 	int i;
456 	u8 reg;
457 	u8 val;
458 
459 	dprintk("stv0299: init chip\n");
460 
461 	stv0299_writeregI(state, 0x02, 0x30 | state->mcr_reg);
462 	msleep(50);
463 
464 	for (i = 0; ; i += 2)  {
465 		reg = state->config->inittab[i];
466 		val = state->config->inittab[i+1];
467 		if (reg == 0xff && val == 0xff)
468 			break;
469 		if (reg == 0x0c && state->config->op0_off)
470 			val &= ~0x10;
471 		if (reg == 0x2)
472 			state->mcr_reg = val & 0xf;
473 		stv0299_writeregI(state, reg, val);
474 	}
475 
476 	return 0;
477 }
478 
479 static int stv0299_read_status(struct dvb_frontend* fe, fe_status_t* status)
480 {
481 	struct stv0299_state* state = fe->demodulator_priv;
482 
483 	u8 signal = 0xff - stv0299_readreg (state, 0x18);
484 	u8 sync = stv0299_readreg (state, 0x1b);
485 
486 	dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
487 	*status = 0;
488 
489 	if (signal > 10)
490 		*status |= FE_HAS_SIGNAL;
491 
492 	if (sync & 0x80)
493 		*status |= FE_HAS_CARRIER;
494 
495 	if (sync & 0x10)
496 		*status |= FE_HAS_VITERBI;
497 
498 	if (sync & 0x08)
499 		*status |= FE_HAS_SYNC;
500 
501 	if ((sync & 0x98) == 0x98)
502 		*status |= FE_HAS_LOCK;
503 
504 	return 0;
505 }
506 
507 static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)
508 {
509 	struct stv0299_state* state = fe->demodulator_priv;
510 
511 	if (state->errmode != STATUS_BER)
512 		return -ENOSYS;
513 
514 	*ber = stv0299_readreg(state, 0x1e) | (stv0299_readreg(state, 0x1d) << 8);
515 
516 	return 0;
517 }
518 
519 static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)
520 {
521 	struct stv0299_state* state = fe->demodulator_priv;
522 
523 	s32 signal =  0xffff - ((stv0299_readreg (state, 0x18) << 8)
524 			       | stv0299_readreg (state, 0x19));
525 
526 	dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __func__,
527 		 stv0299_readreg (state, 0x18),
528 		 stv0299_readreg (state, 0x19), (int) signal);
529 
530 	signal = signal * 5 / 4;
531 	*strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
532 
533 	return 0;
534 }
535 
536 static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)
537 {
538 	struct stv0299_state* state = fe->demodulator_priv;
539 
540 	s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)
541 			   | stv0299_readreg (state, 0x25));
542 	xsnr = 3 * (xsnr - 0xa100);
543 	*snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
544 
545 	return 0;
546 }
547 
548 static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
549 {
550 	struct stv0299_state* state = fe->demodulator_priv;
551 
552 	if (state->errmode != STATUS_UCBLOCKS)
553 		return -ENOSYS;
554 
555 	state->ucblocks += stv0299_readreg(state, 0x1e);
556 	state->ucblocks += (stv0299_readreg(state, 0x1d) << 8);
557 	*ucblocks = state->ucblocks;
558 
559 	return 0;
560 }
561 
562 static int stv0299_set_frontend(struct dvb_frontend *fe)
563 {
564 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
565 	struct stv0299_state* state = fe->demodulator_priv;
566 	int invval = 0;
567 
568 	dprintk ("%s : FE_SET_FRONTEND\n", __func__);
569 	if (state->config->set_ts_params)
570 		state->config->set_ts_params(fe, 0);
571 
572 	// set the inversion
573 	if (p->inversion == INVERSION_OFF) invval = 0;
574 	else if (p->inversion == INVERSION_ON) invval = 1;
575 	else {
576 		printk("stv0299 does not support auto-inversion\n");
577 		return -EINVAL;
578 	}
579 	if (state->config->invert) invval = (~invval) & 1;
580 	stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);
581 
582 	if (fe->ops.tuner_ops.set_params) {
583 		fe->ops.tuner_ops.set_params(fe);
584 		if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
585 	}
586 
587 	stv0299_set_FEC(state, p->fec_inner);
588 	stv0299_set_symbolrate(fe, p->symbol_rate);
589 	stv0299_writeregI(state, 0x22, 0x00);
590 	stv0299_writeregI(state, 0x23, 0x00);
591 
592 	state->tuner_frequency = p->frequency;
593 	state->fec_inner = p->fec_inner;
594 	state->symbol_rate = p->symbol_rate;
595 
596 	return 0;
597 }
598 
599 static int stv0299_get_frontend(struct dvb_frontend *fe)
600 {
601 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
602 	struct stv0299_state* state = fe->demodulator_priv;
603 	s32 derot_freq;
604 	int invval;
605 
606 	derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)
607 				| stv0299_readreg (state, 0x23));
608 
609 	derot_freq *= (state->config->mclk >> 16);
610 	derot_freq += 500;
611 	derot_freq /= 1000;
612 
613 	p->frequency += derot_freq;
614 
615 	invval = stv0299_readreg (state, 0x0c) & 1;
616 	if (state->config->invert) invval = (~invval) & 1;
617 	p->inversion = invval ? INVERSION_ON : INVERSION_OFF;
618 
619 	p->fec_inner = stv0299_get_fec(state);
620 	p->symbol_rate = stv0299_get_symbolrate(state);
621 
622 	return 0;
623 }
624 
625 static int stv0299_sleep(struct dvb_frontend* fe)
626 {
627 	struct stv0299_state* state = fe->demodulator_priv;
628 
629 	stv0299_writeregI(state, 0x02, 0xb0 | state->mcr_reg);
630 	state->initialised = 0;
631 
632 	return 0;
633 }
634 
635 static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
636 {
637 	struct stv0299_state* state = fe->demodulator_priv;
638 
639 	if (enable) {
640 		stv0299_writeregI(state, 0x05, 0xb5);
641 	} else {
642 		stv0299_writeregI(state, 0x05, 0x35);
643 	}
644 	udelay(1);
645 	return 0;
646 }
647 
648 static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
649 {
650 	struct stv0299_state* state = fe->demodulator_priv;
651 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
652 
653 	fesettings->min_delay_ms = state->config->min_delay_ms;
654 	if (p->symbol_rate < 10000000) {
655 		fesettings->step_size = p->symbol_rate / 32000;
656 		fesettings->max_drift = 5000;
657 	} else {
658 		fesettings->step_size = p->symbol_rate / 16000;
659 		fesettings->max_drift = p->symbol_rate / 2000;
660 	}
661 	return 0;
662 }
663 
664 static void stv0299_release(struct dvb_frontend* fe)
665 {
666 	struct stv0299_state* state = fe->demodulator_priv;
667 	kfree(state);
668 }
669 
670 static struct dvb_frontend_ops stv0299_ops;
671 
672 struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,
673 				    struct i2c_adapter* i2c)
674 {
675 	struct stv0299_state* state = NULL;
676 	int id;
677 
678 	/* allocate memory for the internal state */
679 	state = kzalloc(sizeof(struct stv0299_state), GFP_KERNEL);
680 	if (state == NULL) goto error;
681 
682 	/* setup the state */
683 	state->config = config;
684 	state->i2c = i2c;
685 	state->initialised = 0;
686 	state->tuner_frequency = 0;
687 	state->symbol_rate = 0;
688 	state->fec_inner = 0;
689 	state->errmode = STATUS_BER;
690 
691 	/* check if the demod is there */
692 	stv0299_writeregI(state, 0x02, 0x30); /* standby off */
693 	msleep(200);
694 	id = stv0299_readreg(state, 0x00);
695 
696 	/* register 0x00 contains 0xa1 for STV0299 and STV0299B */
697 	/* register 0x00 might contain 0x80 when returning from standby */
698 	if (id != 0xa1 && id != 0x80) goto error;
699 
700 	/* create dvb_frontend */
701 	memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));
702 	state->frontend.demodulator_priv = state;
703 	return &state->frontend;
704 
705 error:
706 	kfree(state);
707 	return NULL;
708 }
709 
710 static struct dvb_frontend_ops stv0299_ops = {
711 	.delsys = { SYS_DVBS },
712 	.info = {
713 		.name			= "ST STV0299 DVB-S",
714 		.frequency_min		= 950000,
715 		.frequency_max		= 2150000,
716 		.frequency_stepsize	= 125,	 /* kHz for QPSK frontends */
717 		.frequency_tolerance	= 0,
718 		.symbol_rate_min	= 1000000,
719 		.symbol_rate_max	= 45000000,
720 		.symbol_rate_tolerance	= 500,	/* ppm */
721 		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
722 		      FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
723 		      FE_CAN_QPSK |
724 		      FE_CAN_FEC_AUTO
725 	},
726 
727 	.release = stv0299_release,
728 
729 	.init = stv0299_init,
730 	.sleep = stv0299_sleep,
731 	.write = stv0299_write,
732 	.i2c_gate_ctrl = stv0299_i2c_gate_ctrl,
733 
734 	.set_frontend = stv0299_set_frontend,
735 	.get_frontend = stv0299_get_frontend,
736 	.get_tune_settings = stv0299_get_tune_settings,
737 
738 	.read_status = stv0299_read_status,
739 	.read_ber = stv0299_read_ber,
740 	.read_signal_strength = stv0299_read_signal_strength,
741 	.read_snr = stv0299_read_snr,
742 	.read_ucblocks = stv0299_read_ucblocks,
743 
744 	.diseqc_send_master_cmd = stv0299_send_diseqc_msg,
745 	.diseqc_send_burst = stv0299_send_diseqc_burst,
746 	.set_tone = stv0299_set_tone,
747 	.set_voltage = stv0299_set_voltage,
748 	.dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
749 };
750 
751 module_param(debug_legacy_dish_switch, int, 0444);
752 MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");
753 
754 module_param(debug, int, 0644);
755 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
756 
757 MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");
758 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, "
759 	      "Andreas Oberritter, Andrew de Quincey, Kenneth Aafly");
760 MODULE_LICENSE("GPL");
761 
762 EXPORT_SYMBOL(stv0299_attach);
763