1 /*
2  * Linux driver for Technisat DVB-S/S2 USB 2.0 device
3  *
4  * Copyright (C) 2010 Patrick Boettcher,
5  *                    Kernel Labs Inc. PO Box 745, St James, NY 11780
6  *
7  * Development was sponsored by Technisat Digital UK Limited, whose
8  * registered office is Witan Gate House 500 - 600 Witan Gate West,
9  * Milton Keynes, MK9 1SH
10  *
11  * This program is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU General Public License as
13  * published by the Free Software Foundation; either version 2 of the
14  * License, or (at your option) any later version.
15  *
16  *
17  * THIS PROGRAM IS PROVIDED "AS IS" AND BOTH THE COPYRIGHT HOLDER AND
18  * TECHNISAT DIGITAL UK LTD DISCLAIM ALL WARRANTIES WITH REGARD TO
19  * THIS PROGRAM INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR
20  * FITNESS FOR A PARTICULAR PURPOSE.  NEITHER THE COPYRIGHT HOLDER
21  * NOR TECHNISAT DIGITAL UK LIMITED SHALL BE LIABLE FOR ANY SPECIAL,
22  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
23  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
24  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
25  * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS PROGRAM. See the
26  * GNU General Public License for more details.
27  */
28 
29 #define DVB_USB_LOG_PREFIX "technisat-usb2"
30 #include "dvb-usb.h"
31 
32 #include "stv6110x.h"
33 #include "stv090x.h"
34 
35 /* module parameters */
36 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
37 
38 static int debug;
39 module_param(debug, int, 0644);
40 MODULE_PARM_DESC(debug,
41 		"set debugging level (bit-mask: 1=info,2=eeprom,4=i2c,8=rc)." \
42 		DVB_USB_DEBUG_STATUS);
43 
44 /* disables all LED control command and
45  * also does not start the signal polling thread */
46 static int disable_led_control;
47 module_param(disable_led_control, int, 0444);
48 MODULE_PARM_DESC(disable_led_control,
49 		"disable LED control of the device (default: 0 - LED control is active).");
50 
51 /* device private data */
52 struct technisat_usb2_state {
53 	struct dvb_usb_device *dev;
54 	struct delayed_work green_led_work;
55 	u8 power_state;
56 
57 	u16 last_scan_code;
58 
59 	u8 buf[64];
60 };
61 
62 /* debug print helpers */
63 #define deb_info(args...)    dprintk(debug, 0x01, args)
64 #define deb_eeprom(args...)  dprintk(debug, 0x02, args)
65 #define deb_i2c(args...)     dprintk(debug, 0x04, args)
66 #define deb_rc(args...)      dprintk(debug, 0x08, args)
67 
68 /* vendor requests */
69 #define SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST 0xB3
70 #define SET_FRONT_END_RESET_VENDOR_REQUEST         0xB4
71 #define GET_VERSION_INFO_VENDOR_REQUEST            0xB5
72 #define SET_GREEN_LED_VENDOR_REQUEST               0xB6
73 #define SET_RED_LED_VENDOR_REQUEST                 0xB7
74 #define GET_IR_DATA_VENDOR_REQUEST                 0xB8
75 #define SET_LED_TIMER_DIVIDER_VENDOR_REQUEST       0xB9
76 #define SET_USB_REENUMERATION                      0xBA
77 
78 /* i2c-access methods */
79 #define I2C_SPEED_100KHZ_BIT 0x40
80 
81 #define I2C_STATUS_NAK 7
82 #define I2C_STATUS_OK 8
83 
84 static int technisat_usb2_i2c_access(struct usb_device *udev,
85 		u8 device_addr, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
86 {
87 	u8 *b;
88 	int ret, actual_length;
89 
90 	b = kmalloc(64, GFP_KERNEL);
91 	if (!b)
92 		return -ENOMEM;
93 
94 	deb_i2c("i2c-access: %02x, tx: ", device_addr);
95 	debug_dump(tx, txlen, deb_i2c);
96 	deb_i2c(" ");
97 
98 	if (txlen > 62) {
99 		err("i2c TX buffer can't exceed 62 bytes (dev 0x%02x)",
100 				device_addr);
101 		txlen = 62;
102 	}
103 	if (rxlen > 62) {
104 		err("i2c RX buffer can't exceed 62 bytes (dev 0x%02x)",
105 				device_addr);
106 		rxlen = 62;
107 	}
108 
109 	b[0] = I2C_SPEED_100KHZ_BIT;
110 	b[1] = device_addr << 1;
111 
112 	if (rx != NULL) {
113 		b[0] |= rxlen;
114 		b[1] |= 1;
115 	}
116 
117 	memcpy(&b[2], tx, txlen);
118 	ret = usb_bulk_msg(udev,
119 			usb_sndbulkpipe(udev, 0x01),
120 			b, 2 + txlen,
121 			NULL, 1000);
122 
123 	if (ret < 0) {
124 		err("i2c-error: out failed %02x = %d", device_addr, ret);
125 		goto err;
126 	}
127 
128 	ret = usb_bulk_msg(udev,
129 			usb_rcvbulkpipe(udev, 0x01),
130 			b, 64, &actual_length, 1000);
131 	if (ret < 0) {
132 		err("i2c-error: in failed %02x = %d", device_addr, ret);
133 		goto err;
134 	}
135 
136 	if (b[0] != I2C_STATUS_OK) {
137 		err("i2c-error: %02x = %d", device_addr, b[0]);
138 		/* handle tuner-i2c-nak */
139 		if (!(b[0] == I2C_STATUS_NAK &&
140 				device_addr == 0x60
141 				/* && device_is_technisat_usb2 */))
142 			goto err;
143 	}
144 
145 	deb_i2c("status: %d, ", b[0]);
146 
147 	if (rx != NULL) {
148 		memcpy(rx, &b[2], rxlen);
149 
150 		deb_i2c("rx (%d): ", rxlen);
151 		debug_dump(rx, rxlen, deb_i2c);
152 	}
153 
154 	deb_i2c("\n");
155 
156 err:
157 	kfree(b);
158 	return ret;
159 }
160 
161 static int technisat_usb2_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
162 				int num)
163 {
164 	int ret = 0, i;
165 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
166 
167 	/* Ensure nobody else hits the i2c bus while we're sending our
168 	   sequence of messages, (such as the remote control thread) */
169 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
170 		return -EAGAIN;
171 
172 	for (i = 0; i < num; i++) {
173 		if (i+1 < num && msg[i+1].flags & I2C_M_RD) {
174 			ret = technisat_usb2_i2c_access(d->udev, msg[i+1].addr,
175 						msg[i].buf, msg[i].len,
176 						msg[i+1].buf, msg[i+1].len);
177 			if (ret != 0)
178 				break;
179 			i++;
180 		} else {
181 			ret = technisat_usb2_i2c_access(d->udev, msg[i].addr,
182 						msg[i].buf, msg[i].len,
183 						NULL, 0);
184 			if (ret != 0)
185 				break;
186 		}
187 	}
188 
189 	if (ret == 0)
190 		ret = i;
191 
192 	mutex_unlock(&d->i2c_mutex);
193 
194 	return ret;
195 }
196 
197 static u32 technisat_usb2_i2c_func(struct i2c_adapter *adapter)
198 {
199 	return I2C_FUNC_I2C;
200 }
201 
202 static struct i2c_algorithm technisat_usb2_i2c_algo = {
203 	.master_xfer   = technisat_usb2_i2c_xfer,
204 	.functionality = technisat_usb2_i2c_func,
205 };
206 
207 #if 0
208 static void technisat_usb2_frontend_reset(struct usb_device *udev)
209 {
210 	usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
211 			SET_FRONT_END_RESET_VENDOR_REQUEST,
212 			USB_TYPE_VENDOR | USB_DIR_OUT,
213 			10, 0,
214 			NULL, 0, 500);
215 }
216 #endif
217 
218 /* LED control */
219 enum technisat_usb2_led_state {
220 	TECH_LED_OFF,
221 	TECH_LED_BLINK,
222 	TECH_LED_ON,
223 	TECH_LED_UNDEFINED
224 };
225 
226 static int technisat_usb2_set_led(struct dvb_usb_device *d, int red,
227 				  enum technisat_usb2_led_state st)
228 {
229 	struct technisat_usb2_state *state = d->priv;
230 	u8 *led = state->buf;
231 	int ret;
232 
233 	led[0] = red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST;
234 
235 	if (disable_led_control && st != TECH_LED_OFF)
236 		return 0;
237 
238 	switch (st) {
239 	case TECH_LED_ON:
240 		led[1] = 0x82;
241 		break;
242 	case TECH_LED_BLINK:
243 		led[1] = 0x82;
244 		if (red) {
245 			led[2] = 0x02;
246 			led[3] = 10;
247 			led[4] = 10;
248 		} else {
249 			led[2] = 0xff;
250 			led[3] = 50;
251 			led[4] = 50;
252 		}
253 		led[5] = 1;
254 		break;
255 
256 	default:
257 	case TECH_LED_OFF:
258 		led[1] = 0x80;
259 		break;
260 	}
261 
262 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
263 		return -EAGAIN;
264 
265 	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
266 		red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST,
267 		USB_TYPE_VENDOR | USB_DIR_OUT,
268 		0, 0,
269 		led, 8, 500);
270 
271 	mutex_unlock(&d->i2c_mutex);
272 	return ret;
273 }
274 
275 static int technisat_usb2_set_led_timer(struct dvb_usb_device *d, u8 red, u8 green)
276 {
277 	struct technisat_usb2_state *state = d->priv;
278 	u8 *b = state->buf;
279 	int ret;
280 
281 	b[0] = 0;
282 
283 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
284 		return -EAGAIN;
285 
286 	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
287 		SET_LED_TIMER_DIVIDER_VENDOR_REQUEST,
288 		USB_TYPE_VENDOR | USB_DIR_OUT,
289 		(red << 8) | green, 0,
290 		b, 1, 500);
291 
292 	mutex_unlock(&d->i2c_mutex);
293 
294 	return ret;
295 }
296 
297 static void technisat_usb2_green_led_control(struct work_struct *work)
298 {
299 	struct technisat_usb2_state *state =
300 		container_of(work, struct technisat_usb2_state, green_led_work.work);
301 	struct dvb_frontend *fe = state->dev->adapter[0].fe_adap[0].fe;
302 
303 	if (state->power_state == 0)
304 		goto schedule;
305 
306 	if (fe != NULL) {
307 		enum fe_status status;
308 
309 		if (fe->ops.read_status(fe, &status) != 0)
310 			goto schedule;
311 
312 		if (status & FE_HAS_LOCK) {
313 			u32 ber;
314 
315 			if (fe->ops.read_ber(fe, &ber) != 0)
316 				goto schedule;
317 
318 			if (ber > 1000)
319 				technisat_usb2_set_led(state->dev, 0, TECH_LED_BLINK);
320 			else
321 				technisat_usb2_set_led(state->dev, 0, TECH_LED_ON);
322 		} else
323 			technisat_usb2_set_led(state->dev, 0, TECH_LED_OFF);
324 	}
325 
326 schedule:
327 	schedule_delayed_work(&state->green_led_work,
328 			msecs_to_jiffies(500));
329 }
330 
331 /* method to find out whether the firmware has to be downloaded or not */
332 static int technisat_usb2_identify_state(struct usb_device *udev,
333 		const struct dvb_usb_device_properties *props,
334 		const struct dvb_usb_device_description **desc, int *cold)
335 {
336 	int ret;
337 	u8 *version;
338 
339 	version = kmalloc(3, GFP_KERNEL);
340 	if (!version)
341 		return -ENOMEM;
342 
343 	/* first select the interface */
344 	if (usb_set_interface(udev, 0, 1) != 0)
345 		err("could not set alternate setting to 0");
346 	else
347 		info("set alternate setting");
348 
349 	*cold = 0; /* by default do not download a firmware - just in case something is wrong */
350 
351 	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
352 		GET_VERSION_INFO_VENDOR_REQUEST,
353 		USB_TYPE_VENDOR | USB_DIR_IN,
354 		0, 0,
355 		version, 3, 500);
356 
357 	if (ret < 0)
358 		*cold = 1;
359 	else {
360 		info("firmware version: %d.%d", version[1], version[2]);
361 		*cold = 0;
362 	}
363 
364 	kfree(version);
365 
366 	return 0;
367 }
368 
369 /* power control */
370 static int technisat_usb2_power_ctrl(struct dvb_usb_device *d, int level)
371 {
372 	struct technisat_usb2_state *state = d->priv;
373 
374 	state->power_state = level;
375 
376 	if (disable_led_control)
377 		return 0;
378 
379 	/* green led is turned off in any case - will be turned on when tuning */
380 	technisat_usb2_set_led(d, 0, TECH_LED_OFF);
381 	/* red led is turned on all the time */
382 	technisat_usb2_set_led(d, 1, TECH_LED_ON);
383 	return 0;
384 }
385 
386 /* mac address reading - from the eeprom */
387 #if 0
388 static void technisat_usb2_eeprom_dump(struct dvb_usb_device *d)
389 {
390 	u8 reg;
391 	u8 b[16];
392 	int i, j;
393 
394 	/* full EEPROM dump */
395 	for (j = 0; j < 256 * 4; j += 16) {
396 		reg = j;
397 		if (technisat_usb2_i2c_access(d->udev, 0x50 + j / 256, &reg, 1, b, 16) != 0)
398 			break;
399 
400 		deb_eeprom("EEPROM: %01x%02x: ", j / 256, reg);
401 		for (i = 0; i < 16; i++)
402 			deb_eeprom("%02x ", b[i]);
403 		deb_eeprom("\n");
404 	}
405 }
406 #endif
407 
408 static u8 technisat_usb2_calc_lrc(const u8 *b, u16 length)
409 {
410 	u8 lrc = 0;
411 	while (--length)
412 		lrc ^= *b++;
413 	return lrc;
414 }
415 
416 static int technisat_usb2_eeprom_lrc_read(struct dvb_usb_device *d,
417 	u16 offset, u8 *b, u16 length, u8 tries)
418 {
419 	u8 bo = offset & 0xff;
420 	struct i2c_msg msg[] = {
421 		{
422 			.addr = 0x50 | ((offset >> 8) & 0x3),
423 			.buf = &bo,
424 			.len = 1
425 		}, {
426 			.addr = 0x50 | ((offset >> 8) & 0x3),
427 			.flags	= I2C_M_RD,
428 			.buf = b,
429 			.len = length
430 		}
431 	};
432 
433 	while (tries--) {
434 		int status;
435 
436 		if (i2c_transfer(&d->i2c_adap, msg, 2) != 2)
437 			break;
438 
439 		status =
440 			technisat_usb2_calc_lrc(b, length - 1) == b[length - 1];
441 
442 		if (status)
443 			return 0;
444 	}
445 
446 	return -EREMOTEIO;
447 }
448 
449 #define EEPROM_MAC_START 0x3f8
450 #define EEPROM_MAC_TOTAL 8
451 static int technisat_usb2_read_mac_address(struct dvb_usb_device *d,
452 		u8 mac[])
453 {
454 	u8 buf[EEPROM_MAC_TOTAL];
455 
456 	if (technisat_usb2_eeprom_lrc_read(d, EEPROM_MAC_START,
457 				buf, EEPROM_MAC_TOTAL, 4) != 0)
458 		return -ENODEV;
459 
460 	memcpy(mac, buf, 6);
461 	return 0;
462 }
463 
464 static struct stv090x_config technisat_usb2_stv090x_config;
465 
466 /* frontend attach */
467 static int technisat_usb2_set_voltage(struct dvb_frontend *fe,
468 				      enum fe_sec_voltage voltage)
469 {
470 	int i;
471 	u8 gpio[3] = { 0 }; /* 0 = 2, 1 = 3, 2 = 4 */
472 
473 	gpio[2] = 1; /* high - voltage ? */
474 
475 	switch (voltage) {
476 	case SEC_VOLTAGE_13:
477 		gpio[0] = 1;
478 		break;
479 	case SEC_VOLTAGE_18:
480 		gpio[0] = 1;
481 		gpio[1] = 1;
482 		break;
483 	default:
484 	case SEC_VOLTAGE_OFF:
485 		break;
486 	}
487 
488 	for (i = 0; i < 3; i++)
489 		if (technisat_usb2_stv090x_config.set_gpio(fe, i+2, 0,
490 							   gpio[i], 0) != 0)
491 			return -EREMOTEIO;
492 	return 0;
493 }
494 
495 static struct stv090x_config technisat_usb2_stv090x_config = {
496 	.device         = STV0903,
497 	.demod_mode     = STV090x_SINGLE,
498 	.clk_mode       = STV090x_CLK_EXT,
499 
500 	.xtal           = 8000000,
501 	.address        = 0x68,
502 
503 	.ts1_mode       = STV090x_TSMODE_DVBCI,
504 	.ts1_clk        = 13400000,
505 	.ts1_tei        = 1,
506 
507 	.repeater_level = STV090x_RPTLEVEL_64,
508 
509 	.tuner_bbgain   = 6,
510 };
511 
512 static struct stv6110x_config technisat_usb2_stv6110x_config = {
513 	.addr           = 0x60,
514 	.refclk         = 16000000,
515 	.clk_div        = 2,
516 };
517 
518 static int technisat_usb2_frontend_attach(struct dvb_usb_adapter *a)
519 {
520 	struct usb_device *udev = a->dev->udev;
521 	int ret;
522 
523 	a->fe_adap[0].fe = dvb_attach(stv090x_attach, &technisat_usb2_stv090x_config,
524 			&a->dev->i2c_adap, STV090x_DEMODULATOR_0);
525 
526 	if (a->fe_adap[0].fe) {
527 		const struct stv6110x_devctl *ctl;
528 
529 		ctl = dvb_attach(stv6110x_attach,
530 				a->fe_adap[0].fe,
531 				&technisat_usb2_stv6110x_config,
532 				&a->dev->i2c_adap);
533 
534 		if (ctl) {
535 			technisat_usb2_stv090x_config.tuner_init          = ctl->tuner_init;
536 			technisat_usb2_stv090x_config.tuner_sleep         = ctl->tuner_sleep;
537 			technisat_usb2_stv090x_config.tuner_set_mode      = ctl->tuner_set_mode;
538 			technisat_usb2_stv090x_config.tuner_set_frequency = ctl->tuner_set_frequency;
539 			technisat_usb2_stv090x_config.tuner_get_frequency = ctl->tuner_get_frequency;
540 			technisat_usb2_stv090x_config.tuner_set_bandwidth = ctl->tuner_set_bandwidth;
541 			technisat_usb2_stv090x_config.tuner_get_bandwidth = ctl->tuner_get_bandwidth;
542 			technisat_usb2_stv090x_config.tuner_set_bbgain    = ctl->tuner_set_bbgain;
543 			technisat_usb2_stv090x_config.tuner_get_bbgain    = ctl->tuner_get_bbgain;
544 			technisat_usb2_stv090x_config.tuner_set_refclk    = ctl->tuner_set_refclk;
545 			technisat_usb2_stv090x_config.tuner_get_status    = ctl->tuner_get_status;
546 
547 			/* call the init function once to initialize
548 			   tuner's clock output divider and demod's
549 			   master clock */
550 			if (a->fe_adap[0].fe->ops.init)
551 				a->fe_adap[0].fe->ops.init(a->fe_adap[0].fe);
552 
553 			if (mutex_lock_interruptible(&a->dev->i2c_mutex) < 0)
554 				return -EAGAIN;
555 
556 			ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
557 					SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST,
558 					USB_TYPE_VENDOR | USB_DIR_OUT,
559 					0, 0,
560 					NULL, 0, 500);
561 			mutex_unlock(&a->dev->i2c_mutex);
562 
563 			if (ret != 0)
564 				err("could not set IF_CLK to external");
565 
566 			a->fe_adap[0].fe->ops.set_voltage = technisat_usb2_set_voltage;
567 
568 			/* if everything was successful assign a nice name to the frontend */
569 			strscpy(a->fe_adap[0].fe->ops.info.name,
570 				a->dev->desc->name,
571 				sizeof(a->fe_adap[0].fe->ops.info.name));
572 		} else {
573 			dvb_frontend_detach(a->fe_adap[0].fe);
574 			a->fe_adap[0].fe = NULL;
575 		}
576 	}
577 
578 	technisat_usb2_set_led_timer(a->dev, 1, 1);
579 
580 	return a->fe_adap[0].fe == NULL ? -ENODEV : 0;
581 }
582 
583 /* Remote control */
584 
585 /* the device is giving providing raw IR-signals to the host mapping
586  * it only to one remote control is just the default implementation
587  */
588 #define NOMINAL_IR_BIT_TRANSITION_TIME_US 889
589 #define NOMINAL_IR_BIT_TIME_US (2 * NOMINAL_IR_BIT_TRANSITION_TIME_US)
590 
591 #define FIRMWARE_CLOCK_TICK 83333
592 #define FIRMWARE_CLOCK_DIVISOR 256
593 
594 #define IR_PERCENT_TOLERANCE 15
595 
596 #define NOMINAL_IR_BIT_TRANSITION_TICKS ((NOMINAL_IR_BIT_TRANSITION_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
597 #define NOMINAL_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICKS / FIRMWARE_CLOCK_DIVISOR)
598 
599 #define NOMINAL_IR_BIT_TIME_TICKS ((NOMINAL_IR_BIT_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
600 #define NOMINAL_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICKS / FIRMWARE_CLOCK_DIVISOR)
601 
602 #define MINIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT - ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
603 #define MAXIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT + ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
604 
605 #define MINIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT - ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
606 #define MAXIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT + ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
607 
608 static int technisat_usb2_get_ir(struct dvb_usb_device *d)
609 {
610 	struct technisat_usb2_state *state = d->priv;
611 	struct ir_raw_event ev;
612 	u8 *buf = state->buf;
613 	int i, ret;
614 
615 	buf[0] = GET_IR_DATA_VENDOR_REQUEST;
616 	buf[1] = 0x08;
617 	buf[2] = 0x8f;
618 	buf[3] = MINIMUM_IR_BIT_TRANSITION_TICK_COUNT;
619 	buf[4] = MAXIMUM_IR_BIT_TIME_TICK_COUNT;
620 
621 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
622 		return -EAGAIN;
623 	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
624 			GET_IR_DATA_VENDOR_REQUEST,
625 			USB_TYPE_VENDOR | USB_DIR_OUT,
626 			0, 0,
627 			buf, 5, 500);
628 	if (ret < 0)
629 		goto unlock;
630 
631 	buf[1] = 0;
632 	buf[2] = 0;
633 	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
634 			GET_IR_DATA_VENDOR_REQUEST,
635 			USB_TYPE_VENDOR | USB_DIR_IN,
636 			0x8080, 0,
637 			buf, 62, 500);
638 
639 unlock:
640 	mutex_unlock(&d->i2c_mutex);
641 
642 	if (ret < 0)
643 		return ret;
644 
645 	if (ret == 1)
646 		return 0; /* no key pressed */
647 
648 	/* decoding */
649 
650 #if 0
651 	deb_rc("RC: %d ", ret);
652 	debug_dump(buf + 1, ret, deb_rc);
653 #endif
654 
655 	ev.pulse = 0;
656 	for (i = 1; i < ARRAY_SIZE(state->buf); i++) {
657 		if (buf[i] == 0xff) {
658 			ev.pulse = 0;
659 			ev.duration = 889 * 2;
660 			ir_raw_event_store(d->rc_dev, &ev);
661 			break;
662 		}
663 
664 		ev.pulse = !ev.pulse;
665 		ev.duration = (buf[i] * FIRMWARE_CLOCK_DIVISOR *
666 			       FIRMWARE_CLOCK_TICK) / (1000 * 1000);
667 		ir_raw_event_store(d->rc_dev, &ev);
668 	}
669 
670 	ir_raw_event_handle(d->rc_dev);
671 
672 	return 1;
673 }
674 
675 static int technisat_usb2_rc_query(struct dvb_usb_device *d)
676 {
677 	int ret = technisat_usb2_get_ir(d);
678 
679 	if (ret < 0)
680 		return ret;
681 
682 	if (ret == 0)
683 		return 0;
684 
685 	if (!disable_led_control)
686 		technisat_usb2_set_led(d, 1, TECH_LED_BLINK);
687 
688 	return 0;
689 }
690 
691 /* DVB-USB and USB stuff follows */
692 enum {
693 	TECHNISAT_USB2_DVB_S2,
694 };
695 
696 static struct usb_device_id technisat_usb2_id_table[] = {
697 	DVB_USB_DEV(TECHNISAT, TECHNISAT_USB2_DVB_S2),
698 	{ }
699 };
700 
701 MODULE_DEVICE_TABLE(usb, technisat_usb2_id_table);
702 
703 /* device description */
704 static struct dvb_usb_device_properties technisat_usb2_devices = {
705 	.caps              = DVB_USB_IS_AN_I2C_ADAPTER,
706 
707 	.usb_ctrl          = CYPRESS_FX2,
708 
709 	.identify_state    = technisat_usb2_identify_state,
710 	.firmware          = "dvb-usb-SkyStar_USB_HD_FW_v17_63.HEX.fw",
711 
712 	.size_of_priv      = sizeof(struct technisat_usb2_state),
713 
714 	.i2c_algo          = &technisat_usb2_i2c_algo,
715 
716 	.power_ctrl        = technisat_usb2_power_ctrl,
717 	.read_mac_address  = technisat_usb2_read_mac_address,
718 
719 	.num_adapters = 1,
720 	.adapter = {
721 		{
722 		.num_frontends = 1,
723 		.fe = {{
724 			.frontend_attach  = technisat_usb2_frontend_attach,
725 
726 			.stream = {
727 				.type = USB_ISOC,
728 				.count = 4,
729 				.endpoint = 0x2,
730 				.u = {
731 					.isoc = {
732 						.framesperurb = 32,
733 						.framesize = 2048,
734 						.interval = 1,
735 					}
736 				}
737 			},
738 		}},
739 			.size_of_priv = 0,
740 		},
741 	},
742 
743 	.num_device_descs = 1,
744 	.devices = {
745 		{   "Technisat SkyStar USB HD (DVB-S/S2)",
746 			{ &technisat_usb2_id_table[TECHNISAT_USB2_DVB_S2], NULL },
747 			{ NULL },
748 		},
749 	},
750 
751 	.rc.core = {
752 		.rc_interval = 100,
753 		.rc_codes    = RC_MAP_TECHNISAT_USB2,
754 		.module_name = "technisat-usb2",
755 		.rc_query    = technisat_usb2_rc_query,
756 		.allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER,
757 		.driver_type    = RC_DRIVER_IR_RAW,
758 	}
759 };
760 
761 static int technisat_usb2_probe(struct usb_interface *intf,
762 		const struct usb_device_id *id)
763 {
764 	struct dvb_usb_device *dev;
765 
766 	if (dvb_usb_device_init(intf, &technisat_usb2_devices, THIS_MODULE,
767 				&dev, adapter_nr) != 0)
768 		return -ENODEV;
769 
770 	if (dev) {
771 		struct technisat_usb2_state *state = dev->priv;
772 		state->dev = dev;
773 
774 		if (!disable_led_control) {
775 			INIT_DELAYED_WORK(&state->green_led_work,
776 					technisat_usb2_green_led_control);
777 			schedule_delayed_work(&state->green_led_work,
778 					msecs_to_jiffies(500));
779 		}
780 	}
781 
782 	return 0;
783 }
784 
785 static void technisat_usb2_disconnect(struct usb_interface *intf)
786 {
787 	struct dvb_usb_device *dev = usb_get_intfdata(intf);
788 
789 	/* work and stuff was only created when the device is hot-state */
790 	if (dev != NULL) {
791 		struct technisat_usb2_state *state = dev->priv;
792 		if (state != NULL)
793 			cancel_delayed_work_sync(&state->green_led_work);
794 	}
795 
796 	dvb_usb_device_exit(intf);
797 }
798 
799 static struct usb_driver technisat_usb2_driver = {
800 	.name       = "dvb_usb_technisat_usb2",
801 	.probe      = technisat_usb2_probe,
802 	.disconnect = technisat_usb2_disconnect,
803 	.id_table   = technisat_usb2_id_table,
804 };
805 
806 module_usb_driver(technisat_usb2_driver);
807 
808 MODULE_AUTHOR("Patrick Boettcher <pboettcher@kernellabs.com>");
809 MODULE_DESCRIPTION("Driver for Technisat DVB-S/S2 USB 2.0 device");
810 MODULE_VERSION("1.0");
811 MODULE_LICENSE("GPL");
812