1 /*
2  DVB device driver for em28xx
3 
4  (c) 2008-2011 Mauro Carvalho Chehab <mchehab@infradead.org>
5 
6  (c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
7 	- Fixes for the driver to properly work with HVR-950
8 	- Fixes for the driver to properly work with Pinnacle PCTV HD Pro Stick
9 	- Fixes for the driver to properly work with AMD ATI TV Wonder HD 600
10 
11  (c) 2008 Aidan Thornton <makosoft@googlemail.com>
12 
13  (c) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
14 
15  Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
16 	(c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
17 	(c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
18 
19  This program is free software; you can redistribute it and/or modify
20  it under the terms of the GNU General Public License as published by
21  the Free Software Foundation; either version 2 of the License.
22  */
23 
24 #include "em28xx.h"
25 
26 #include <linux/kernel.h>
27 #include <linux/slab.h>
28 #include <linux/usb.h>
29 
30 #include <media/v4l2-common.h>
31 #include <dvb_demux.h>
32 #include <dvb_net.h>
33 #include <dmxdev.h>
34 #include <media/tuner.h>
35 #include "tuner-simple.h"
36 #include <linux/gpio.h>
37 
38 #include "lgdt330x.h"
39 #include "lgdt3305.h"
40 #include "lgdt3306a.h"
41 #include "zl10353.h"
42 #include "s5h1409.h"
43 #include "mt2060.h"
44 #include "mt352.h"
45 #include "mt352_priv.h" /* FIXME */
46 #include "tda1002x.h"
47 #include "drx39xyj/drx39xxj.h"
48 #include "tda18271.h"
49 #include "s921.h"
50 #include "drxd.h"
51 #include "cxd2820r.h"
52 #include "tda18271c2dd.h"
53 #include "drxk.h"
54 #include "tda10071.h"
55 #include "tda18212.h"
56 #include "a8293.h"
57 #include "qt1010.h"
58 #include "mb86a20s.h"
59 #include "m88ds3103.h"
60 #include "ts2020.h"
61 #include "si2168.h"
62 #include "si2157.h"
63 #include "tc90522.h"
64 #include "qm1d1c0042.h"
65 
66 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
67 MODULE_LICENSE("GPL");
68 MODULE_DESCRIPTION(DRIVER_DESC " - digital TV interface");
69 MODULE_VERSION(EM28XX_VERSION);
70 
71 static unsigned int debug;
72 module_param(debug, int, 0644);
73 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
74 
75 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
76 
77 #define dprintk(level, fmt, arg...) do {				\
78 	if (debug >= level)						\
79 		dev_printk(KERN_DEBUG, &dev->intf->dev,			\
80 			   "dvb: " fmt, ## arg);			\
81 } while (0)
82 
83 struct em28xx_dvb {
84 	struct dvb_frontend        *fe[2];
85 
86 	/* feed count management */
87 	struct mutex               lock;
88 	int                        nfeeds;
89 
90 	/* general boilerplate stuff */
91 	struct dvb_adapter         adapter;
92 	struct dvb_demux           demux;
93 	struct dmxdev              dmxdev;
94 	struct dmx_frontend        fe_hw;
95 	struct dmx_frontend        fe_mem;
96 	struct dvb_net             net;
97 
98 	/* Due to DRX-K - probably need changes */
99 	int (*gate_ctrl)(struct dvb_frontend *, int);
100 	struct semaphore      pll_mutex;
101 	bool			dont_attach_fe1;
102 	int			lna_gpio;
103 	struct i2c_client	*i2c_client_demod;
104 	struct i2c_client	*i2c_client_tuner;
105 	struct i2c_client	*i2c_client_sec;
106 };
107 
108 static inline void print_err_status(struct em28xx *dev,
109 				    int packet, int status)
110 {
111 	char *errmsg = "Unknown";
112 
113 	switch (status) {
114 	case -ENOENT:
115 		errmsg = "unlinked synchronuously";
116 		break;
117 	case -ECONNRESET:
118 		errmsg = "unlinked asynchronuously";
119 		break;
120 	case -ENOSR:
121 		errmsg = "Buffer error (overrun)";
122 		break;
123 	case -EPIPE:
124 		errmsg = "Stalled (device not responding)";
125 		break;
126 	case -EOVERFLOW:
127 		errmsg = "Babble (bad cable?)";
128 		break;
129 	case -EPROTO:
130 		errmsg = "Bit-stuff error (bad cable?)";
131 		break;
132 	case -EILSEQ:
133 		errmsg = "CRC/Timeout (could be anything)";
134 		break;
135 	case -ETIME:
136 		errmsg = "Device does not respond";
137 		break;
138 	}
139 	if (packet < 0) {
140 		dprintk(1, "URB status %d [%s].\n", status, errmsg);
141 	} else {
142 		dprintk(1, "URB packet %d, status %d [%s].\n",
143 			packet, status, errmsg);
144 	}
145 }
146 
147 static inline int em28xx_dvb_urb_data_copy(struct em28xx *dev, struct urb *urb)
148 {
149 	int xfer_bulk, num_packets, i;
150 
151 	if (!dev)
152 		return 0;
153 
154 	if (dev->disconnected)
155 		return 0;
156 
157 	if (urb->status < 0)
158 		print_err_status(dev, -1, urb->status);
159 
160 	xfer_bulk = usb_pipebulk(urb->pipe);
161 
162 	if (xfer_bulk) /* bulk */
163 		num_packets = 1;
164 	else /* isoc */
165 		num_packets = urb->number_of_packets;
166 
167 	for (i = 0; i < num_packets; i++) {
168 		if (xfer_bulk) {
169 			if (urb->status < 0) {
170 				print_err_status(dev, i, urb->status);
171 				if (urb->status != -EPROTO)
172 					continue;
173 			}
174 			if (!urb->actual_length)
175 				continue;
176 			dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
177 					 urb->actual_length);
178 		} else {
179 			if (urb->iso_frame_desc[i].status < 0) {
180 				print_err_status(dev, i,
181 						 urb->iso_frame_desc[i].status);
182 				if (urb->iso_frame_desc[i].status != -EPROTO)
183 					continue;
184 			}
185 			if (!urb->iso_frame_desc[i].actual_length)
186 				continue;
187 			dvb_dmx_swfilter(&dev->dvb->demux,
188 					 urb->transfer_buffer +
189 					 urb->iso_frame_desc[i].offset,
190 					 urb->iso_frame_desc[i].actual_length);
191 		}
192 	}
193 
194 	return 0;
195 }
196 
197 static int em28xx_start_streaming(struct em28xx_dvb *dvb)
198 {
199 	int rc;
200 	struct em28xx_i2c_bus *i2c_bus = dvb->adapter.priv;
201 	struct em28xx *dev = i2c_bus->dev;
202 	struct usb_device *udev = interface_to_usbdev(dev->intf);
203 	int dvb_max_packet_size, packet_multiplier, dvb_alt;
204 
205 	if (dev->dvb_xfer_bulk) {
206 		if (!dev->dvb_ep_bulk)
207 			return -ENODEV;
208 		dvb_max_packet_size = 512; /* USB 2.0 spec */
209 		packet_multiplier = EM28XX_DVB_BULK_PACKET_MULTIPLIER;
210 		dvb_alt = 0;
211 	} else { /* isoc */
212 		if (!dev->dvb_ep_isoc)
213 			return -ENODEV;
214 		dvb_max_packet_size = dev->dvb_max_pkt_size_isoc;
215 		if (dvb_max_packet_size < 0)
216 			return dvb_max_packet_size;
217 		packet_multiplier = EM28XX_DVB_NUM_ISOC_PACKETS;
218 		dvb_alt = dev->dvb_alt_isoc;
219 	}
220 
221 	usb_set_interface(udev, dev->ifnum, dvb_alt);
222 	rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
223 	if (rc < 0)
224 		return rc;
225 
226 	dprintk(1, "Using %d buffers each with %d x %d bytes, alternate %d\n",
227 		EM28XX_DVB_NUM_BUFS,
228 		packet_multiplier,
229 		dvb_max_packet_size, dvb_alt);
230 
231 	return em28xx_init_usb_xfer(dev, EM28XX_DIGITAL_MODE,
232 				    dev->dvb_xfer_bulk,
233 				    EM28XX_DVB_NUM_BUFS,
234 				    dvb_max_packet_size,
235 				    packet_multiplier,
236 				    em28xx_dvb_urb_data_copy);
237 }
238 
239 static int em28xx_stop_streaming(struct em28xx_dvb *dvb)
240 {
241 	struct em28xx_i2c_bus *i2c_bus = dvb->adapter.priv;
242 	struct em28xx *dev = i2c_bus->dev;
243 
244 	em28xx_stop_urbs(dev);
245 
246 	return 0;
247 }
248 
249 static int em28xx_start_feed(struct dvb_demux_feed *feed)
250 {
251 	struct dvb_demux *demux  = feed->demux;
252 	struct em28xx_dvb *dvb = demux->priv;
253 	int rc, ret;
254 
255 	if (!demux->dmx.frontend)
256 		return -EINVAL;
257 
258 	mutex_lock(&dvb->lock);
259 	dvb->nfeeds++;
260 	rc = dvb->nfeeds;
261 
262 	if (dvb->nfeeds == 1) {
263 		ret = em28xx_start_streaming(dvb);
264 		if (ret < 0)
265 			rc = ret;
266 	}
267 
268 	mutex_unlock(&dvb->lock);
269 	return rc;
270 }
271 
272 static int em28xx_stop_feed(struct dvb_demux_feed *feed)
273 {
274 	struct dvb_demux *demux  = feed->demux;
275 	struct em28xx_dvb *dvb = demux->priv;
276 	int err = 0;
277 
278 	mutex_lock(&dvb->lock);
279 	dvb->nfeeds--;
280 
281 	if (0 == dvb->nfeeds)
282 		err = em28xx_stop_streaming(dvb);
283 
284 	mutex_unlock(&dvb->lock);
285 	return err;
286 }
287 
288 
289 /* ------------------------------------------------------------------ */
290 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
291 {
292 	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
293 	struct em28xx *dev = i2c_bus->dev;
294 
295 	if (acquire)
296 		return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
297 	else
298 		return em28xx_set_mode(dev, EM28XX_SUSPEND);
299 }
300 
301 /* ------------------------------------------------------------------ */
302 
303 static struct lgdt330x_config em2880_lgdt3303_dev = {
304 	.demod_address = 0x0e,
305 	.demod_chip = LGDT3303,
306 };
307 
308 static struct lgdt3305_config em2870_lgdt3304_dev = {
309 	.i2c_addr           = 0x0e,
310 	.demod_chip         = LGDT3304,
311 	.spectral_inversion = 1,
312 	.deny_i2c_rptr      = 1,
313 	.mpeg_mode          = LGDT3305_MPEG_PARALLEL,
314 	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
315 	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
316 	.vsb_if_khz         = 3250,
317 	.qam_if_khz         = 4000,
318 };
319 
320 static struct lgdt3305_config em2874_lgdt3305_dev = {
321 	.i2c_addr           = 0x0e,
322 	.demod_chip         = LGDT3305,
323 	.spectral_inversion = 1,
324 	.deny_i2c_rptr      = 0,
325 	.mpeg_mode          = LGDT3305_MPEG_SERIAL,
326 	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
327 	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
328 	.vsb_if_khz         = 3250,
329 	.qam_if_khz         = 4000,
330 };
331 
332 static struct lgdt3305_config em2874_lgdt3305_nogate_dev = {
333 	.i2c_addr           = 0x0e,
334 	.demod_chip         = LGDT3305,
335 	.spectral_inversion = 1,
336 	.deny_i2c_rptr      = 1,
337 	.mpeg_mode          = LGDT3305_MPEG_SERIAL,
338 	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
339 	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
340 	.vsb_if_khz         = 3600,
341 	.qam_if_khz         = 3600,
342 };
343 
344 static struct s921_config sharp_isdbt = {
345 	.demod_address = 0x30 >> 1
346 };
347 
348 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
349 	.demod_address = (0x1e >> 1),
350 	.no_tuner = 1,
351 	.parallel_ts = 1,
352 	.if2 = 45600,
353 };
354 
355 static struct s5h1409_config em28xx_s5h1409_with_xc3028 = {
356 	.demod_address = 0x32 >> 1,
357 	.output_mode   = S5H1409_PARALLEL_OUTPUT,
358 	.gpio          = S5H1409_GPIO_OFF,
359 	.inversion     = S5H1409_INVERSION_OFF,
360 	.status_mode   = S5H1409_DEMODLOCKING,
361 	.mpeg_timing   = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK
362 };
363 
364 static struct tda18271_std_map kworld_a340_std_map = {
365 	.atsc_6   = { .if_freq = 3250, .agc_mode = 3, .std = 0,
366 		      .if_lvl = 1, .rfagc_top = 0x37, },
367 	.qam_6    = { .if_freq = 4000, .agc_mode = 3, .std = 1,
368 		      .if_lvl = 1, .rfagc_top = 0x37, },
369 };
370 
371 static struct tda18271_config kworld_a340_config = {
372 	.std_map           = &kworld_a340_std_map,
373 };
374 
375 static struct tda18271_config kworld_ub435q_v2_config = {
376 	.std_map	= &kworld_a340_std_map,
377 	.gate		= TDA18271_GATE_DIGITAL,
378 };
379 
380 static struct tda18212_config kworld_ub435q_v3_config = {
381 	.if_atsc_vsb	= 3600,
382 	.if_atsc_qam	= 3600,
383 };
384 
385 static struct zl10353_config em28xx_zl10353_xc3028_no_i2c_gate = {
386 	.demod_address = (0x1e >> 1),
387 	.no_tuner = 1,
388 	.disable_i2c_gate_ctrl = 1,
389 	.parallel_ts = 1,
390 	.if2 = 45600,
391 };
392 
393 static struct drxd_config em28xx_drxd = {
394 	.demod_address = 0x70,
395 	.demod_revision = 0xa2,
396 	.pll_type = DRXD_PLL_NONE,
397 	.clock = 12000,
398 	.insert_rs_byte = 1,
399 	.IF = 42800000,
400 	.disable_i2c_gate_ctrl = 1,
401 };
402 
403 static struct drxk_config terratec_h5_drxk = {
404 	.adr = 0x29,
405 	.single_master = 1,
406 	.no_i2c_bridge = 1,
407 	.microcode_name = "dvb-usb-terratec-h5-drxk.fw",
408 	.qam_demod_parameter_count = 2,
409 };
410 
411 static struct drxk_config hauppauge_930c_drxk = {
412 	.adr = 0x29,
413 	.single_master = 1,
414 	.no_i2c_bridge = 1,
415 	.microcode_name = "dvb-usb-hauppauge-hvr930c-drxk.fw",
416 	.chunk_size = 56,
417 	.qam_demod_parameter_count = 2,
418 };
419 
420 static struct drxk_config terratec_htc_stick_drxk = {
421 	.adr = 0x29,
422 	.single_master = 1,
423 	.no_i2c_bridge = 1,
424 	.microcode_name = "dvb-usb-terratec-htc-stick-drxk.fw",
425 	.chunk_size = 54,
426 	.qam_demod_parameter_count = 2,
427 	/* Required for the antenna_gpio to disable LNA. */
428 	.antenna_dvbt = true,
429 	/* The windows driver uses the same. This will disable LNA. */
430 	.antenna_gpio = 0x6,
431 };
432 
433 static struct drxk_config maxmedia_ub425_tc_drxk = {
434 	.adr = 0x29,
435 	.single_master = 1,
436 	.no_i2c_bridge = 1,
437 	.microcode_name = "dvb-demod-drxk-01.fw",
438 	.chunk_size = 62,
439 	.qam_demod_parameter_count = 2,
440 };
441 
442 static struct drxk_config pctv_520e_drxk = {
443 	.adr = 0x29,
444 	.single_master = 1,
445 	.microcode_name = "dvb-demod-drxk-pctv.fw",
446 	.qam_demod_parameter_count = 2,
447 	.chunk_size = 58,
448 	.antenna_dvbt = true, /* disable LNA */
449 	.antenna_gpio = (1 << 2), /* disable LNA */
450 };
451 
452 static int drxk_gate_ctrl(struct dvb_frontend *fe, int enable)
453 {
454 	struct em28xx_dvb *dvb = fe->sec_priv;
455 	int status;
456 
457 	if (!dvb)
458 		return -EINVAL;
459 
460 	if (enable) {
461 		down(&dvb->pll_mutex);
462 		status = dvb->gate_ctrl(fe, 1);
463 	} else {
464 		status = dvb->gate_ctrl(fe, 0);
465 		up(&dvb->pll_mutex);
466 	}
467 	return status;
468 }
469 
470 static void hauppauge_hvr930c_init(struct em28xx *dev)
471 {
472 	int i;
473 
474 	struct em28xx_reg_seq hauppauge_hvr930c_init[] = {
475 		{EM2874_R80_GPIO_P0_CTRL,	0xff,	0xff,	0x65},
476 		{EM2874_R80_GPIO_P0_CTRL,	0xfb,	0xff,	0x32},
477 		{EM2874_R80_GPIO_P0_CTRL,	0xff,	0xff,	0xb8},
478 		{	-1,			-1,	-1,	-1},
479 	};
480 	struct em28xx_reg_seq hauppauge_hvr930c_end[] = {
481 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x01},
482 		{EM2874_R80_GPIO_P0_CTRL,	0xaf,	0xff,	0x65},
483 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x76},
484 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x01},
485 		{EM2874_R80_GPIO_P0_CTRL,	0xcf,	0xff,	0x0b},
486 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x40},
487 
488 		{EM2874_R80_GPIO_P0_CTRL,	0xcf,	0xff,	0x65},
489 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x65},
490 		{EM2874_R80_GPIO_P0_CTRL,	0xcf,	0xff,	0x0b},
491 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x65},
492 
493 		{	-1,			-1,	-1,	-1},
494 	};
495 
496 	struct {
497 		unsigned char r[4];
498 		int len;
499 	} regs[] = {
500 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
501 		{{ 0x01, 0x02 }, 2},
502 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
503 		{{ 0x01, 0x00 }, 2},
504 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
505 		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
506 		{{ 0x01, 0x00 }, 2},
507 		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
508 		{{ 0x04, 0x00 }, 2},
509 		{{ 0x00, 0x04 }, 2},
510 		{{ 0x00, 0x04, 0x00, 0x0a }, 4},
511 		{{ 0x04, 0x14 }, 2},
512 		{{ 0x04, 0x14, 0x00, 0x00 }, 4},
513 	};
514 
515 	em28xx_gpio_set(dev, hauppauge_hvr930c_init);
516 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
517 	msleep(10);
518 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
519 	msleep(10);
520 
521 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
522 
523 	for (i = 0; i < ARRAY_SIZE(regs); i++)
524 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
525 	em28xx_gpio_set(dev, hauppauge_hvr930c_end);
526 
527 	msleep(100);
528 
529 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
530 	msleep(30);
531 
532 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x45);
533 	msleep(10);
534 
535 }
536 
537 static void terratec_h5_init(struct em28xx *dev)
538 {
539 	int i;
540 	struct em28xx_reg_seq terratec_h5_init[] = {
541 		{EM2820_R08_GPIO_CTRL,		0xff,	0xff,	10},
542 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
543 		{EM2874_R80_GPIO_P0_CTRL,	0xf2,	0xff,	50},
544 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
545 		{	-1,			-1,	-1,	-1},
546 	};
547 	struct em28xx_reg_seq terratec_h5_end[] = {
548 		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	100},
549 		{EM2874_R80_GPIO_P0_CTRL,	0xa6,	0xff,	50},
550 		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	100},
551 		{	-1,			-1,	-1,	-1},
552 	};
553 	struct {
554 		unsigned char r[4];
555 		int len;
556 	} regs[] = {
557 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
558 		{{ 0x01, 0x02 }, 2},
559 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
560 		{{ 0x01, 0x00 }, 2},
561 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
562 		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
563 		{{ 0x01, 0x00 }, 2},
564 		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
565 		{{ 0x04, 0x00 }, 2},
566 		{{ 0x00, 0x04 }, 2},
567 		{{ 0x00, 0x04, 0x00, 0x0a }, 4},
568 		{{ 0x04, 0x14 }, 2},
569 		{{ 0x04, 0x14, 0x00, 0x00 }, 4},
570 	};
571 
572 	em28xx_gpio_set(dev, terratec_h5_init);
573 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
574 	msleep(10);
575 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x45);
576 	msleep(10);
577 
578 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
579 
580 	for (i = 0; i < ARRAY_SIZE(regs); i++)
581 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
582 	em28xx_gpio_set(dev, terratec_h5_end);
583 };
584 
585 static void terratec_htc_stick_init(struct em28xx *dev)
586 {
587 	int i;
588 
589 	/*
590 	 * GPIO configuration:
591 	 * 0xff: unknown (does not affect DVB-T).
592 	 * 0xf6: DRX-K (demodulator).
593 	 * 0xe6: unknown (does not affect DVB-T).
594 	 * 0xb6: unknown (does not affect DVB-T).
595 	 */
596 	struct em28xx_reg_seq terratec_htc_stick_init[] = {
597 		{EM2820_R08_GPIO_CTRL,		0xff,	0xff,	10},
598 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
599 		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	50},
600 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
601 		{	-1,			-1,	-1,	-1},
602 	};
603 	struct em28xx_reg_seq terratec_htc_stick_end[] = {
604 		{EM2874_R80_GPIO_P0_CTRL,	0xb6,	0xff,	100},
605 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	50},
606 		{	-1,			-1,	-1,	-1},
607 	};
608 
609 	/*
610 	 * Init the analog decoder (not yet supported), but
611 	 * it's probably still a good idea.
612 	 */
613 	struct {
614 		unsigned char r[4];
615 		int len;
616 	} regs[] = {
617 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
618 		{{ 0x01, 0x02 }, 2},
619 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
620 		{{ 0x01, 0x00 }, 2},
621 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
622 	};
623 
624 	em28xx_gpio_set(dev, terratec_htc_stick_init);
625 
626 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
627 	msleep(10);
628 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
629 	msleep(10);
630 
631 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
632 
633 	for (i = 0; i < ARRAY_SIZE(regs); i++)
634 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
635 
636 	em28xx_gpio_set(dev, terratec_htc_stick_end);
637 };
638 
639 static void terratec_htc_usb_xs_init(struct em28xx *dev)
640 {
641 	int i;
642 
643 	struct em28xx_reg_seq terratec_htc_usb_xs_init[] = {
644 		{EM2820_R08_GPIO_CTRL,		0xff,	0xff,	10},
645 		{EM2874_R80_GPIO_P0_CTRL,	0xb2,	0xff,	100},
646 		{EM2874_R80_GPIO_P0_CTRL,	0xb2,	0xff,	50},
647 		{EM2874_R80_GPIO_P0_CTRL,	0xb6,	0xff,	100},
648 		{	-1,			-1,	-1,	-1},
649 	};
650 	struct em28xx_reg_seq terratec_htc_usb_xs_end[] = {
651 		{EM2874_R80_GPIO_P0_CTRL,	0xa6,	0xff,	100},
652 		{EM2874_R80_GPIO_P0_CTRL,	0xa6,	0xff,	50},
653 		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	100},
654 		{	-1,			-1,	-1,	-1},
655 	};
656 
657 	/*
658 	 * Init the analog decoder (not yet supported), but
659 	 * it's probably still a good idea.
660 	 */
661 	struct {
662 		unsigned char r[4];
663 		int len;
664 	} regs[] = {
665 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
666 		{{ 0x01, 0x02 }, 2},
667 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
668 		{{ 0x01, 0x00 }, 2},
669 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
670 		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
671 		{{ 0x01, 0x00 }, 2},
672 		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
673 		{{ 0x04, 0x00 }, 2},
674 		{{ 0x00, 0x04 }, 2},
675 		{{ 0x00, 0x04, 0x00, 0x0a }, 4},
676 		{{ 0x04, 0x14 }, 2},
677 		{{ 0x04, 0x14, 0x00, 0x00 }, 4},
678 	};
679 
680 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
681 
682 	em28xx_gpio_set(dev, terratec_htc_usb_xs_init);
683 
684 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
685 	msleep(10);
686 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
687 	msleep(10);
688 
689 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
690 
691 	for (i = 0; i < ARRAY_SIZE(regs); i++)
692 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
693 
694 	em28xx_gpio_set(dev, terratec_htc_usb_xs_end);
695 };
696 
697 static void pctv_520e_init(struct em28xx *dev)
698 {
699 	/*
700 	 * Init AVF4910B analog decoder. Looks like I2C traffic to
701 	 * digital demodulator and tuner are routed via AVF4910B.
702 	 */
703 	int i;
704 	struct {
705 		unsigned char r[4];
706 		int len;
707 	} regs[] = {
708 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
709 		{{ 0x01, 0x02 }, 2},
710 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
711 		{{ 0x01, 0x00 }, 2},
712 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
713 		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
714 		{{ 0x01, 0x00 }, 2},
715 		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
716 	};
717 
718 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1; /* 0x41 */
719 
720 	for (i = 0; i < ARRAY_SIZE(regs); i++)
721 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
722 };
723 
724 static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe)
725 {
726 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
727 	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
728 	struct em28xx *dev = i2c_bus->dev;
729 #ifdef CONFIG_GPIOLIB
730 	struct em28xx_dvb *dvb = dev->dvb;
731 	int ret;
732 	unsigned long flags;
733 
734 	if (c->lna == 1)
735 		flags = GPIOF_OUT_INIT_HIGH; /* enable LNA */
736 	else
737 		flags = GPIOF_OUT_INIT_LOW; /* disable LNA */
738 
739 	ret = gpio_request_one(dvb->lna_gpio, flags, NULL);
740 	if (ret)
741 		dev_err(&dev->intf->dev, "gpio request failed %d\n", ret);
742 	else
743 		gpio_free(dvb->lna_gpio);
744 
745 	return ret;
746 #else
747 	dev_warn(&dev->intf->dev, "%s: LNA control is disabled (lna=%u)\n",
748 		 KBUILD_MODNAME, c->lna);
749 	return 0;
750 #endif
751 }
752 
753 static int em28xx_pctv_292e_set_lna(struct dvb_frontend *fe)
754 {
755 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
756 	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
757 	struct em28xx *dev = i2c_bus->dev;
758 	u8 lna;
759 
760 	if (c->lna == 1)
761 		lna = 0x01;
762 	else
763 		lna = 0x00;
764 
765 	return em28xx_write_reg_bits(dev, EM2874_R80_GPIO_P0_CTRL, lna, 0x01);
766 }
767 
768 static int em28xx_mt352_terratec_xs_init(struct dvb_frontend *fe)
769 {
770 	/* Values extracted from a USB trace of the Terratec Windows driver */
771 	static u8 clock_config[]   = { CLOCK_CTL,  0x38, 0x2c };
772 	static u8 reset[]          = { RESET,      0x80 };
773 	static u8 adc_ctl_1_cfg[]  = { ADC_CTL_1,  0x40 };
774 	static u8 agc_cfg[]        = { AGC_TARGET, 0x28, 0xa0 };
775 	static u8 input_freq_cfg[] = { INPUT_FREQ_1, 0x31, 0xb8 };
776 	static u8 rs_err_cfg[]     = { RS_ERR_PER_1, 0x00, 0x4d };
777 	static u8 capt_range_cfg[] = { CAPT_RANGE, 0x32 };
778 	static u8 trl_nom_cfg[]    = { TRL_NOMINAL_RATE_1, 0x64, 0x00 };
779 	static u8 tps_given_cfg[]  = { TPS_GIVEN_1, 0x40, 0x80, 0x50 };
780 	static u8 tuner_go[]       = { TUNER_GO, 0x01};
781 
782 	mt352_write(fe, clock_config,   sizeof(clock_config));
783 	udelay(200);
784 	mt352_write(fe, reset,          sizeof(reset));
785 	mt352_write(fe, adc_ctl_1_cfg,  sizeof(adc_ctl_1_cfg));
786 	mt352_write(fe, agc_cfg,        sizeof(agc_cfg));
787 	mt352_write(fe, input_freq_cfg, sizeof(input_freq_cfg));
788 	mt352_write(fe, rs_err_cfg,     sizeof(rs_err_cfg));
789 	mt352_write(fe, capt_range_cfg, sizeof(capt_range_cfg));
790 	mt352_write(fe, trl_nom_cfg,    sizeof(trl_nom_cfg));
791 	mt352_write(fe, tps_given_cfg,  sizeof(tps_given_cfg));
792 	mt352_write(fe, tuner_go,       sizeof(tuner_go));
793 	return 0;
794 }
795 
796 static void px_bcud_init(struct em28xx *dev)
797 {
798 	int i;
799 	struct {
800 		unsigned char r[4];
801 		int len;
802 	} regs1[] = {
803 		{{ 0x0e, 0x77 }, 2},
804 		{{ 0x0f, 0x77 }, 2},
805 		{{ 0x03, 0x90 }, 2},
806 	}, regs2[] = {
807 		{{ 0x07, 0x01 }, 2},
808 		{{ 0x08, 0x10 }, 2},
809 		{{ 0x13, 0x00 }, 2},
810 		{{ 0x17, 0x00 }, 2},
811 		{{ 0x03, 0x01 }, 2},
812 		{{ 0x10, 0xb1 }, 2},
813 		{{ 0x11, 0x40 }, 2},
814 		{{ 0x85, 0x7a }, 2},
815 		{{ 0x87, 0x04 }, 2},
816 	};
817 	static struct em28xx_reg_seq gpio[] = {
818 		{EM28XX_R06_I2C_CLK,		0x40,	0xff,	300},
819 		{EM2874_R80_GPIO_P0_CTRL,	0xfd,	0xff,	60},
820 		{EM28XX_R15_RGAIN,		0x20,	0xff,	0},
821 		{EM28XX_R16_GGAIN,		0x20,	0xff,	0},
822 		{EM28XX_R17_BGAIN,		0x20,	0xff,	0},
823 		{EM28XX_R18_ROFFSET,		0x00,	0xff,	0},
824 		{EM28XX_R19_GOFFSET,		0x00,	0xff,	0},
825 		{EM28XX_R1A_BOFFSET,		0x00,	0xff,	0},
826 		{EM28XX_R23_UOFFSET,		0x00,	0xff,	0},
827 		{EM28XX_R24_VOFFSET,		0x00,	0xff,	0},
828 		{EM28XX_R26_COMPR,		0x00,	0xff,	0},
829 		{0x13,				0x08,	0xff,	0},
830 		{EM28XX_R12_VINENABLE,		0x27,	0xff,	0},
831 		{EM28XX_R0C_USBSUSP,		0x10,	0xff,	0},
832 		{EM28XX_R27_OUTFMT,		0x00,	0xff,	0},
833 		{EM28XX_R10_VINMODE,		0x00,	0xff,	0},
834 		{EM28XX_R11_VINCTRL,		0x11,	0xff,	0},
835 		{EM2874_R50_IR_CONFIG,		0x01,	0xff,	0},
836 		{EM2874_R5F_TS_ENABLE,		0x80,	0xff,	0},
837 		{EM28XX_R06_I2C_CLK,		0x46,	0xff,	0},
838 	};
839 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x46);
840 	/* sleeping ISDB-T */
841 	dev->dvb->i2c_client_demod->addr = 0x14;
842 	for (i = 0; i < ARRAY_SIZE(regs1); i++)
843 		i2c_master_send(dev->dvb->i2c_client_demod, regs1[i].r,
844 				regs1[i].len);
845 	/* sleeping ISDB-S */
846 	dev->dvb->i2c_client_demod->addr = 0x15;
847 	for (i = 0; i < ARRAY_SIZE(regs2); i++)
848 		i2c_master_send(dev->dvb->i2c_client_demod, regs2[i].r,
849 				regs2[i].len);
850 	for (i = 0; i < ARRAY_SIZE(gpio); i++) {
851 		em28xx_write_reg_bits(dev, gpio[i].reg, gpio[i].val,
852 				      gpio[i].mask);
853 		if (gpio[i].sleep > 0)
854 			msleep(gpio[i].sleep);
855 	}
856 };
857 
858 static struct mt352_config terratec_xs_mt352_cfg = {
859 	.demod_address = (0x1e >> 1),
860 	.no_tuner = 1,
861 	.if2 = 45600,
862 	.demod_init = em28xx_mt352_terratec_xs_init,
863 };
864 
865 static struct tda10023_config em28xx_tda10023_config = {
866 	.demod_address = 0x0c,
867 	.invert = 1,
868 };
869 
870 static struct cxd2820r_config em28xx_cxd2820r_config = {
871 	.i2c_address = (0xd8 >> 1),
872 	.ts_mode = CXD2820R_TS_SERIAL,
873 };
874 
875 static struct tda18271_config em28xx_cxd2820r_tda18271_config = {
876 	.output_opt = TDA18271_OUTPUT_LT_OFF,
877 	.gate = TDA18271_GATE_DIGITAL,
878 };
879 
880 static struct zl10353_config em28xx_zl10353_no_i2c_gate_dev = {
881 	.demod_address = (0x1e >> 1),
882 	.disable_i2c_gate_ctrl = 1,
883 	.no_tuner = 1,
884 	.parallel_ts = 1,
885 };
886 
887 static struct mt2060_config em28xx_mt2060_config = {
888 	.i2c_address = 0x60,
889 };
890 
891 static struct qt1010_config em28xx_qt1010_config = {
892 	.i2c_address = 0x62
893 };
894 
895 static const struct mb86a20s_config c3tech_duo_mb86a20s_config = {
896 	.demod_address = 0x10,
897 	.is_serial = true,
898 };
899 
900 static struct tda18271_std_map mb86a20s_tda18271_config = {
901 	.dvbt_6   = { .if_freq = 4000, .agc_mode = 3, .std = 4,
902 		      .if_lvl = 1, .rfagc_top = 0x37, },
903 };
904 
905 static struct tda18271_config c3tech_duo_tda18271_config = {
906 	.std_map = &mb86a20s_tda18271_config,
907 	.gate    = TDA18271_GATE_DIGITAL,
908 	.small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
909 };
910 
911 static struct tda18271_std_map drx_j_std_map = {
912 	.atsc_6   = { .if_freq = 5000, .agc_mode = 3, .std = 0, .if_lvl = 1,
913 		      .rfagc_top = 0x37, },
914 	.qam_6    = { .if_freq = 5380, .agc_mode = 3, .std = 3, .if_lvl = 1,
915 		      .rfagc_top = 0x37, },
916 };
917 
918 static struct tda18271_config pinnacle_80e_dvb_config = {
919 	.std_map = &drx_j_std_map,
920 	.gate    = TDA18271_GATE_DIGITAL,
921 	.role    = TDA18271_MASTER,
922 };
923 
924 static struct lgdt3306a_config hauppauge_01595_lgdt3306a_config = {
925 	.qam_if_khz         = 4000,
926 	.vsb_if_khz         = 3250,
927 	.spectral_inversion = 0,
928 	.deny_i2c_rptr      = 0,
929 	.mpeg_mode          = LGDT3306A_MPEG_SERIAL,
930 	.tpclk_edge         = LGDT3306A_TPCLK_RISING_EDGE,
931 	.tpvalid_polarity   = LGDT3306A_TP_VALID_HIGH,
932 	.xtalMHz            = 25,
933 };
934 
935 /* ------------------------------------------------------------------ */
936 
937 static int em28xx_attach_xc3028(u8 addr, struct em28xx *dev)
938 {
939 	struct dvb_frontend *fe;
940 	struct xc2028_config cfg;
941 	struct xc2028_ctrl ctl;
942 
943 	memset(&cfg, 0, sizeof(cfg));
944 	cfg.i2c_adap  = &dev->i2c_adap[dev->def_i2c_bus];
945 	cfg.i2c_addr  = addr;
946 
947 	memset(&ctl, 0, sizeof(ctl));
948 	em28xx_setup_xc3028(dev, &ctl);
949 	cfg.ctrl  = &ctl;
950 
951 	if (!dev->dvb->fe[0]) {
952 		dev_err(&dev->intf->dev,
953 			"dvb frontend not attached. Can't attach xc3028\n");
954 		return -EINVAL;
955 	}
956 
957 	fe = dvb_attach(xc2028_attach, dev->dvb->fe[0], &cfg);
958 	if (!fe) {
959 		dev_err(&dev->intf->dev, "xc3028 attach failed\n");
960 		dvb_frontend_detach(dev->dvb->fe[0]);
961 		dev->dvb->fe[0] = NULL;
962 		return -EINVAL;
963 	}
964 
965 	dev_info(&dev->intf->dev, "xc3028 attached\n");
966 
967 	return 0;
968 }
969 
970 /* ------------------------------------------------------------------ */
971 
972 static int em28xx_register_dvb(struct em28xx_dvb *dvb, struct module *module,
973 			       struct em28xx *dev, struct device *device)
974 {
975 	int result;
976 	bool create_rf_connector = false;
977 
978 	mutex_init(&dvb->lock);
979 
980 	/* register adapter */
981 	result = dvb_register_adapter(&dvb->adapter,
982 				      dev_name(&dev->intf->dev), module,
983 				      device, adapter_nr);
984 	if (result < 0) {
985 		dev_warn(&dev->intf->dev,
986 			 "dvb_register_adapter failed (errno = %d)\n",
987 			 result);
988 		goto fail_adapter;
989 	}
990 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
991 	dvb->adapter.mdev = dev->media_dev;
992 #endif
993 
994 	/* Ensure all frontends negotiate bus access */
995 	dvb->fe[0]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
996 	if (dvb->fe[1])
997 		dvb->fe[1]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
998 
999 	dvb->adapter.priv = &dev->i2c_bus[dev->def_i2c_bus];
1000 
1001 	/* register frontend */
1002 	result = dvb_register_frontend(&dvb->adapter, dvb->fe[0]);
1003 	if (result < 0) {
1004 		dev_warn(&dev->intf->dev,
1005 			 "dvb_register_frontend failed (errno = %d)\n",
1006 			 result);
1007 		goto fail_frontend0;
1008 	}
1009 
1010 	/* register 2nd frontend */
1011 	if (dvb->fe[1]) {
1012 		result = dvb_register_frontend(&dvb->adapter, dvb->fe[1]);
1013 		if (result < 0) {
1014 			dev_warn(&dev->intf->dev,
1015 				 "2nd dvb_register_frontend failed (errno = %d)\n",
1016 				 result);
1017 			goto fail_frontend1;
1018 		}
1019 	}
1020 
1021 	/* register demux stuff */
1022 	dvb->demux.dmx.capabilities =
1023 		DMX_TS_FILTERING | DMX_SECTION_FILTERING |
1024 		DMX_MEMORY_BASED_FILTERING;
1025 	dvb->demux.priv       = dvb;
1026 	dvb->demux.filternum  = 256;
1027 	dvb->demux.feednum    = 256;
1028 	dvb->demux.start_feed = em28xx_start_feed;
1029 	dvb->demux.stop_feed  = em28xx_stop_feed;
1030 
1031 	result = dvb_dmx_init(&dvb->demux);
1032 	if (result < 0) {
1033 		dev_warn(&dev->intf->dev,
1034 			 "dvb_dmx_init failed (errno = %d)\n",
1035 			 result);
1036 		goto fail_dmx;
1037 	}
1038 
1039 	dvb->dmxdev.filternum    = 256;
1040 	dvb->dmxdev.demux        = &dvb->demux.dmx;
1041 	dvb->dmxdev.capabilities = 0;
1042 	result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
1043 	if (result < 0) {
1044 		dev_warn(&dev->intf->dev,
1045 			 "dvb_dmxdev_init failed (errno = %d)\n",
1046 			 result);
1047 		goto fail_dmxdev;
1048 	}
1049 
1050 	dvb->fe_hw.source = DMX_FRONTEND_0;
1051 	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
1052 	if (result < 0) {
1053 		dev_warn(&dev->intf->dev,
1054 			 "add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
1055 			 result);
1056 		goto fail_fe_hw;
1057 	}
1058 
1059 	dvb->fe_mem.source = DMX_MEMORY_FE;
1060 	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
1061 	if (result < 0) {
1062 		dev_warn(&dev->intf->dev,
1063 			 "add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
1064 			 result);
1065 		goto fail_fe_mem;
1066 	}
1067 
1068 	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
1069 	if (result < 0) {
1070 		dev_warn(&dev->intf->dev,
1071 			 "connect_frontend failed (errno = %d)\n",
1072 			 result);
1073 		goto fail_fe_conn;
1074 	}
1075 
1076 	/* register network adapter */
1077 	dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
1078 
1079 	/* If the analog part won't create RF connectors, DVB will do it */
1080 	if (!dev->has_video || (dev->tuner_type == TUNER_ABSENT))
1081 		create_rf_connector = true;
1082 
1083 	result = dvb_create_media_graph(&dvb->adapter, create_rf_connector);
1084 	if (result < 0)
1085 		goto fail_create_graph;
1086 
1087 	return 0;
1088 
1089 fail_create_graph:
1090 	dvb_net_release(&dvb->net);
1091 fail_fe_conn:
1092 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
1093 fail_fe_mem:
1094 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
1095 fail_fe_hw:
1096 	dvb_dmxdev_release(&dvb->dmxdev);
1097 fail_dmxdev:
1098 	dvb_dmx_release(&dvb->demux);
1099 fail_dmx:
1100 	if (dvb->fe[1])
1101 		dvb_unregister_frontend(dvb->fe[1]);
1102 	dvb_unregister_frontend(dvb->fe[0]);
1103 fail_frontend1:
1104 	if (dvb->fe[1])
1105 		dvb_frontend_detach(dvb->fe[1]);
1106 fail_frontend0:
1107 	dvb_frontend_detach(dvb->fe[0]);
1108 	dvb_unregister_adapter(&dvb->adapter);
1109 fail_adapter:
1110 	return result;
1111 }
1112 
1113 static void em28xx_unregister_dvb(struct em28xx_dvb *dvb)
1114 {
1115 	dvb_net_release(&dvb->net);
1116 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
1117 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
1118 	dvb_dmxdev_release(&dvb->dmxdev);
1119 	dvb_dmx_release(&dvb->demux);
1120 	if (dvb->fe[1])
1121 		dvb_unregister_frontend(dvb->fe[1]);
1122 	dvb_unregister_frontend(dvb->fe[0]);
1123 	if (dvb->fe[1] && !dvb->dont_attach_fe1)
1124 		dvb_frontend_detach(dvb->fe[1]);
1125 	dvb_frontend_detach(dvb->fe[0]);
1126 	dvb_unregister_adapter(&dvb->adapter);
1127 }
1128 
1129 static int em28xx_dvb_init(struct em28xx *dev)
1130 {
1131 	int result = 0;
1132 	struct em28xx_dvb *dvb;
1133 
1134 	if (dev->is_audio_only) {
1135 		/* Shouldn't initialize IR for this interface */
1136 		return 0;
1137 	}
1138 
1139 	if (!dev->board.has_dvb) {
1140 		/* This device does not support the extension */
1141 		return 0;
1142 	}
1143 
1144 	dev_info(&dev->intf->dev, "Binding DVB extension\n");
1145 
1146 	dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
1147 	if (!dvb)
1148 		return -ENOMEM;
1149 
1150 	dev->dvb = dvb;
1151 	dvb->fe[0] = dvb->fe[1] = NULL;
1152 
1153 	/* pre-allocate DVB usb transfer buffers */
1154 	if (dev->dvb_xfer_bulk) {
1155 		result = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE,
1156 					   dev->dvb_xfer_bulk,
1157 					   EM28XX_DVB_NUM_BUFS,
1158 					   512,
1159 					   EM28XX_DVB_BULK_PACKET_MULTIPLIER);
1160 	} else {
1161 		result = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE,
1162 					   dev->dvb_xfer_bulk,
1163 					   EM28XX_DVB_NUM_BUFS,
1164 					   dev->dvb_max_pkt_size_isoc,
1165 					   EM28XX_DVB_NUM_ISOC_PACKETS);
1166 	}
1167 	if (result) {
1168 		dev_err(&dev->intf->dev,
1169 			"failed to pre-allocate USB transfer buffers for DVB.\n");
1170 		kfree(dvb);
1171 		dev->dvb = NULL;
1172 		return result;
1173 	}
1174 
1175 	mutex_lock(&dev->lock);
1176 	em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
1177 	/* init frontend */
1178 	switch (dev->model) {
1179 	case EM2874_BOARD_LEADERSHIP_ISDBT:
1180 		dvb->fe[0] = dvb_attach(s921_attach,
1181 				&sharp_isdbt, &dev->i2c_adap[dev->def_i2c_bus]);
1182 
1183 		if (!dvb->fe[0]) {
1184 			result = -EINVAL;
1185 			goto out_free;
1186 		}
1187 
1188 		break;
1189 	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
1190 	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
1191 	case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
1192 	case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
1193 		dvb->fe[0] = dvb_attach(lgdt330x_attach,
1194 					   &em2880_lgdt3303_dev,
1195 					   &dev->i2c_adap[dev->def_i2c_bus]);
1196 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1197 			result = -EINVAL;
1198 			goto out_free;
1199 		}
1200 		break;
1201 	case EM2880_BOARD_KWORLD_DVB_310U:
1202 		dvb->fe[0] = dvb_attach(zl10353_attach,
1203 					   &em28xx_zl10353_with_xc3028,
1204 					   &dev->i2c_adap[dev->def_i2c_bus]);
1205 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1206 			result = -EINVAL;
1207 			goto out_free;
1208 		}
1209 		break;
1210 	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
1211 	case EM2882_BOARD_TERRATEC_HYBRID_XS:
1212 	case EM2880_BOARD_EMPIRE_DUAL_TV:
1213 		dvb->fe[0] = dvb_attach(zl10353_attach,
1214 					   &em28xx_zl10353_xc3028_no_i2c_gate,
1215 					   &dev->i2c_adap[dev->def_i2c_bus]);
1216 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1217 			result = -EINVAL;
1218 			goto out_free;
1219 		}
1220 		break;
1221 	case EM2880_BOARD_TERRATEC_HYBRID_XS:
1222 	case EM2880_BOARD_TERRATEC_HYBRID_XS_FR:
1223 	case EM2881_BOARD_PINNACLE_HYBRID_PRO:
1224 	case EM2882_BOARD_DIKOM_DK300:
1225 	case EM2882_BOARD_KWORLD_VS_DVBT:
1226 		dvb->fe[0] = dvb_attach(zl10353_attach,
1227 					   &em28xx_zl10353_xc3028_no_i2c_gate,
1228 					   &dev->i2c_adap[dev->def_i2c_bus]);
1229 		if (dvb->fe[0] == NULL) {
1230 			/* This board could have either a zl10353 or a mt352.
1231 			   If the chip id isn't for zl10353, try mt352 */
1232 			dvb->fe[0] = dvb_attach(mt352_attach,
1233 						   &terratec_xs_mt352_cfg,
1234 						   &dev->i2c_adap[dev->def_i2c_bus]);
1235 		}
1236 
1237 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1238 			result = -EINVAL;
1239 			goto out_free;
1240 		}
1241 		break;
1242 	case EM2870_BOARD_TERRATEC_XS_MT2060:
1243 		dvb->fe[0] = dvb_attach(zl10353_attach,
1244 						&em28xx_zl10353_no_i2c_gate_dev,
1245 						&dev->i2c_adap[dev->def_i2c_bus]);
1246 		if (dvb->fe[0] != NULL) {
1247 			dvb_attach(mt2060_attach, dvb->fe[0],
1248 					&dev->i2c_adap[dev->def_i2c_bus],
1249 					&em28xx_mt2060_config, 1220);
1250 		}
1251 		break;
1252 	case EM2870_BOARD_KWORLD_355U:
1253 		dvb->fe[0] = dvb_attach(zl10353_attach,
1254 					   &em28xx_zl10353_no_i2c_gate_dev,
1255 					   &dev->i2c_adap[dev->def_i2c_bus]);
1256 		if (dvb->fe[0] != NULL)
1257 			dvb_attach(qt1010_attach, dvb->fe[0],
1258 				   &dev->i2c_adap[dev->def_i2c_bus], &em28xx_qt1010_config);
1259 		break;
1260 	case EM2883_BOARD_KWORLD_HYBRID_330U:
1261 	case EM2882_BOARD_EVGA_INDTUBE:
1262 		dvb->fe[0] = dvb_attach(s5h1409_attach,
1263 					   &em28xx_s5h1409_with_xc3028,
1264 					   &dev->i2c_adap[dev->def_i2c_bus]);
1265 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1266 			result = -EINVAL;
1267 			goto out_free;
1268 		}
1269 		break;
1270 	case EM2882_BOARD_KWORLD_ATSC_315U:
1271 		dvb->fe[0] = dvb_attach(lgdt330x_attach,
1272 					   &em2880_lgdt3303_dev,
1273 					   &dev->i2c_adap[dev->def_i2c_bus]);
1274 		if (dvb->fe[0] != NULL) {
1275 			if (!dvb_attach(simple_tuner_attach, dvb->fe[0],
1276 					&dev->i2c_adap[dev->def_i2c_bus],
1277 					0x61, TUNER_THOMSON_DTT761X)) {
1278 				result = -EINVAL;
1279 				goto out_free;
1280 			}
1281 		}
1282 		break;
1283 	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
1284 	case EM2882_BOARD_PINNACLE_HYBRID_PRO_330E:
1285 		dvb->fe[0] = dvb_attach(drxd_attach, &em28xx_drxd, NULL,
1286 					&dev->i2c_adap[dev->def_i2c_bus],
1287 					&dev->intf->dev);
1288 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1289 			result = -EINVAL;
1290 			goto out_free;
1291 		}
1292 		break;
1293 	case EM2870_BOARD_REDDO_DVB_C_USB_BOX:
1294 		/* Philips CU1216L NIM (Philips TDA10023 + Infineon TUA6034) */
1295 		dvb->fe[0] = dvb_attach(tda10023_attach,
1296 			&em28xx_tda10023_config,
1297 			&dev->i2c_adap[dev->def_i2c_bus], 0x48);
1298 		if (dvb->fe[0]) {
1299 			if (!dvb_attach(simple_tuner_attach, dvb->fe[0],
1300 					&dev->i2c_adap[dev->def_i2c_bus],
1301 					0x60, TUNER_PHILIPS_CU1216L)) {
1302 				result = -EINVAL;
1303 				goto out_free;
1304 			}
1305 		}
1306 		break;
1307 	case EM2870_BOARD_KWORLD_A340:
1308 		dvb->fe[0] = dvb_attach(lgdt3305_attach,
1309 					   &em2870_lgdt3304_dev,
1310 					   &dev->i2c_adap[dev->def_i2c_bus]);
1311 		if (!dvb->fe[0]) {
1312 			result = -EINVAL;
1313 			goto out_free;
1314 		}
1315 		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1316 				&dev->i2c_adap[dev->def_i2c_bus],
1317 			&kworld_a340_config)) {
1318 				dvb_frontend_detach(dvb->fe[0]);
1319 				result = -EINVAL;
1320 				goto out_free;
1321 		}
1322 		break;
1323 	case EM28174_BOARD_PCTV_290E:
1324 		/* set default GPIO0 for LNA, used if GPIOLIB is undefined */
1325 		dvb->lna_gpio = CXD2820R_GPIO_E | CXD2820R_GPIO_O |
1326 				CXD2820R_GPIO_L;
1327 		dvb->fe[0] = dvb_attach(cxd2820r_attach,
1328 					&em28xx_cxd2820r_config,
1329 					&dev->i2c_adap[dev->def_i2c_bus],
1330 					&dvb->lna_gpio);
1331 		if (dvb->fe[0]) {
1332 			/* FE 0 attach tuner */
1333 			if (!dvb_attach(tda18271_attach,
1334 					dvb->fe[0],
1335 					0x60,
1336 					&dev->i2c_adap[dev->def_i2c_bus],
1337 					&em28xx_cxd2820r_tda18271_config)) {
1338 
1339 				dvb_frontend_detach(dvb->fe[0]);
1340 				result = -EINVAL;
1341 				goto out_free;
1342 			}
1343 
1344 #ifdef CONFIG_GPIOLIB
1345 			/* enable LNA for DVB-T, DVB-T2 and DVB-C */
1346 			result = gpio_request_one(dvb->lna_gpio,
1347 						  GPIOF_OUT_INIT_LOW, NULL);
1348 			if (result)
1349 				dev_err(&dev->intf->dev,
1350 					"gpio request failed %d\n",
1351 					result);
1352 			else
1353 				gpio_free(dvb->lna_gpio);
1354 
1355 			result = 0; /* continue even set LNA fails */
1356 #endif
1357 			dvb->fe[0]->ops.set_lna = em28xx_pctv_290e_set_lna;
1358 		}
1359 
1360 		break;
1361 	case EM2884_BOARD_HAUPPAUGE_WINTV_HVR_930C:
1362 	{
1363 		struct xc5000_config cfg;
1364 
1365 		hauppauge_hvr930c_init(dev);
1366 
1367 		dvb->fe[0] = dvb_attach(drxk_attach,
1368 					&hauppauge_930c_drxk, &dev->i2c_adap[dev->def_i2c_bus]);
1369 		if (!dvb->fe[0]) {
1370 			result = -EINVAL;
1371 			goto out_free;
1372 		}
1373 		/* FIXME: do we need a pll semaphore? */
1374 		dvb->fe[0]->sec_priv = dvb;
1375 		sema_init(&dvb->pll_mutex, 1);
1376 		dvb->gate_ctrl = dvb->fe[0]->ops.i2c_gate_ctrl;
1377 		dvb->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
1378 
1379 		/* Attach xc5000 */
1380 		memset(&cfg, 0, sizeof(cfg));
1381 		cfg.i2c_address  = 0x61;
1382 		cfg.if_khz = 4000;
1383 
1384 		if (dvb->fe[0]->ops.i2c_gate_ctrl)
1385 			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 1);
1386 		if (!dvb_attach(xc5000_attach, dvb->fe[0], &dev->i2c_adap[dev->def_i2c_bus],
1387 				&cfg)) {
1388 			result = -EINVAL;
1389 			goto out_free;
1390 		}
1391 		if (dvb->fe[0]->ops.i2c_gate_ctrl)
1392 			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 0);
1393 
1394 		break;
1395 	}
1396 	case EM2884_BOARD_TERRATEC_H5:
1397 		terratec_h5_init(dev);
1398 
1399 		dvb->fe[0] = dvb_attach(drxk_attach, &terratec_h5_drxk, &dev->i2c_adap[dev->def_i2c_bus]);
1400 		if (!dvb->fe[0]) {
1401 			result = -EINVAL;
1402 			goto out_free;
1403 		}
1404 		/* FIXME: do we need a pll semaphore? */
1405 		dvb->fe[0]->sec_priv = dvb;
1406 		sema_init(&dvb->pll_mutex, 1);
1407 		dvb->gate_ctrl = dvb->fe[0]->ops.i2c_gate_ctrl;
1408 		dvb->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
1409 
1410 		/* Attach tda18271 to DVB-C frontend */
1411 		if (dvb->fe[0]->ops.i2c_gate_ctrl)
1412 			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 1);
1413 		if (!dvb_attach(tda18271c2dd_attach, dvb->fe[0], &dev->i2c_adap[dev->def_i2c_bus], 0x60)) {
1414 			result = -EINVAL;
1415 			goto out_free;
1416 		}
1417 		if (dvb->fe[0]->ops.i2c_gate_ctrl)
1418 			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 0);
1419 
1420 		break;
1421 	case EM2884_BOARD_C3TECH_DIGITAL_DUO:
1422 		dvb->fe[0] = dvb_attach(mb86a20s_attach,
1423 					   &c3tech_duo_mb86a20s_config,
1424 					   &dev->i2c_adap[dev->def_i2c_bus]);
1425 		if (dvb->fe[0] != NULL)
1426 			dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1427 				   &dev->i2c_adap[dev->def_i2c_bus],
1428 				   &c3tech_duo_tda18271_config);
1429 		break;
1430 	case EM28174_BOARD_PCTV_460E: {
1431 		struct i2c_client *client;
1432 		struct i2c_board_info board_info;
1433 		struct tda10071_platform_data tda10071_pdata = {};
1434 		struct a8293_platform_data a8293_pdata = {};
1435 
1436 		/* attach demod + tuner combo */
1437 		tda10071_pdata.clk = 40444000, /* 40.444 MHz */
1438 		tda10071_pdata.i2c_wr_max = 64,
1439 		tda10071_pdata.ts_mode = TDA10071_TS_SERIAL,
1440 		tda10071_pdata.pll_multiplier = 20,
1441 		tda10071_pdata.tuner_i2c_addr = 0x14,
1442 		memset(&board_info, 0, sizeof(board_info));
1443 		strlcpy(board_info.type, "tda10071_cx24118", I2C_NAME_SIZE);
1444 		board_info.addr = 0x55;
1445 		board_info.platform_data = &tda10071_pdata;
1446 		request_module("tda10071");
1447 		client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &board_info);
1448 		if (client == NULL || client->dev.driver == NULL) {
1449 			result = -ENODEV;
1450 			goto out_free;
1451 		}
1452 		if (!try_module_get(client->dev.driver->owner)) {
1453 			i2c_unregister_device(client);
1454 			result = -ENODEV;
1455 			goto out_free;
1456 		}
1457 		dvb->fe[0] = tda10071_pdata.get_dvb_frontend(client);
1458 		dvb->i2c_client_demod = client;
1459 
1460 		/* attach SEC */
1461 		a8293_pdata.dvb_frontend = dvb->fe[0];
1462 		memset(&board_info, 0, sizeof(board_info));
1463 		strlcpy(board_info.type, "a8293", I2C_NAME_SIZE);
1464 		board_info.addr = 0x08;
1465 		board_info.platform_data = &a8293_pdata;
1466 		request_module("a8293");
1467 		client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &board_info);
1468 		if (client == NULL || client->dev.driver == NULL) {
1469 			module_put(dvb->i2c_client_demod->dev.driver->owner);
1470 			i2c_unregister_device(dvb->i2c_client_demod);
1471 			result = -ENODEV;
1472 			goto out_free;
1473 		}
1474 		if (!try_module_get(client->dev.driver->owner)) {
1475 			i2c_unregister_device(client);
1476 			module_put(dvb->i2c_client_demod->dev.driver->owner);
1477 			i2c_unregister_device(dvb->i2c_client_demod);
1478 			result = -ENODEV;
1479 			goto out_free;
1480 		}
1481 		dvb->i2c_client_sec = client;
1482 		break;
1483 	}
1484 	case EM2874_BOARD_DELOCK_61959:
1485 	case EM2874_BOARD_MAXMEDIA_UB425_TC:
1486 		/* attach demodulator */
1487 		dvb->fe[0] = dvb_attach(drxk_attach, &maxmedia_ub425_tc_drxk,
1488 				&dev->i2c_adap[dev->def_i2c_bus]);
1489 
1490 		if (dvb->fe[0]) {
1491 			/* disable I2C-gate */
1492 			dvb->fe[0]->ops.i2c_gate_ctrl = NULL;
1493 
1494 			/* attach tuner */
1495 			if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1496 					&dev->i2c_adap[dev->def_i2c_bus],
1497 					&em28xx_cxd2820r_tda18271_config)) {
1498 				dvb_frontend_detach(dvb->fe[0]);
1499 				result = -EINVAL;
1500 				goto out_free;
1501 			}
1502 		}
1503 		break;
1504 	case EM2884_BOARD_PCTV_510E:
1505 	case EM2884_BOARD_PCTV_520E:
1506 		pctv_520e_init(dev);
1507 
1508 		/* attach demodulator */
1509 		dvb->fe[0] = dvb_attach(drxk_attach, &pctv_520e_drxk,
1510 				&dev->i2c_adap[dev->def_i2c_bus]);
1511 
1512 		if (dvb->fe[0]) {
1513 			/* attach tuner */
1514 			if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1515 					&dev->i2c_adap[dev->def_i2c_bus],
1516 					&em28xx_cxd2820r_tda18271_config)) {
1517 				dvb_frontend_detach(dvb->fe[0]);
1518 				result = -EINVAL;
1519 				goto out_free;
1520 			}
1521 		}
1522 		break;
1523 	case EM2884_BOARD_ELGATO_EYETV_HYBRID_2008:
1524 	case EM2884_BOARD_CINERGY_HTC_STICK:
1525 		terratec_htc_stick_init(dev);
1526 
1527 		/* attach demodulator */
1528 		dvb->fe[0] = dvb_attach(drxk_attach, &terratec_htc_stick_drxk,
1529 					&dev->i2c_adap[dev->def_i2c_bus]);
1530 		if (!dvb->fe[0]) {
1531 			result = -EINVAL;
1532 			goto out_free;
1533 		}
1534 
1535 		/* Attach the demodulator. */
1536 		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1537 				&dev->i2c_adap[dev->def_i2c_bus],
1538 				&em28xx_cxd2820r_tda18271_config)) {
1539 			result = -EINVAL;
1540 			goto out_free;
1541 		}
1542 		break;
1543 	case EM2884_BOARD_TERRATEC_HTC_USB_XS:
1544 		terratec_htc_usb_xs_init(dev);
1545 
1546 		/* attach demodulator */
1547 		dvb->fe[0] = dvb_attach(drxk_attach, &terratec_htc_stick_drxk,
1548 					&dev->i2c_adap[dev->def_i2c_bus]);
1549 		if (!dvb->fe[0]) {
1550 			result = -EINVAL;
1551 			goto out_free;
1552 		}
1553 
1554 		/* Attach the demodulator. */
1555 		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1556 				&dev->i2c_adap[dev->def_i2c_bus],
1557 				&em28xx_cxd2820r_tda18271_config)) {
1558 			result = -EINVAL;
1559 			goto out_free;
1560 		}
1561 		break;
1562 	case EM2874_BOARD_KWORLD_UB435Q_V2:
1563 		dvb->fe[0] = dvb_attach(lgdt3305_attach,
1564 					&em2874_lgdt3305_dev,
1565 					&dev->i2c_adap[dev->def_i2c_bus]);
1566 		if (!dvb->fe[0]) {
1567 			result = -EINVAL;
1568 			goto out_free;
1569 		}
1570 
1571 		/* Attach the demodulator. */
1572 		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1573 				&dev->i2c_adap[dev->def_i2c_bus],
1574 				&kworld_ub435q_v2_config)) {
1575 			result = -EINVAL;
1576 			goto out_free;
1577 		}
1578 		break;
1579 	case EM2874_BOARD_KWORLD_UB435Q_V3:
1580 	{
1581 		struct i2c_client *client;
1582 		struct i2c_adapter *adapter = &dev->i2c_adap[dev->def_i2c_bus];
1583 		struct i2c_board_info board_info = {
1584 			.type = "tda18212",
1585 			.addr = 0x60,
1586 			.platform_data = &kworld_ub435q_v3_config,
1587 		};
1588 
1589 		dvb->fe[0] = dvb_attach(lgdt3305_attach,
1590 					&em2874_lgdt3305_nogate_dev,
1591 					&dev->i2c_adap[dev->def_i2c_bus]);
1592 		if (!dvb->fe[0]) {
1593 			result = -EINVAL;
1594 			goto out_free;
1595 		}
1596 
1597 		/* attach tuner */
1598 		kworld_ub435q_v3_config.fe = dvb->fe[0];
1599 		request_module("tda18212");
1600 		client = i2c_new_device(adapter, &board_info);
1601 		if (client == NULL || client->dev.driver == NULL) {
1602 			dvb_frontend_detach(dvb->fe[0]);
1603 			result = -ENODEV;
1604 			goto out_free;
1605 		}
1606 
1607 		if (!try_module_get(client->dev.driver->owner)) {
1608 			i2c_unregister_device(client);
1609 			dvb_frontend_detach(dvb->fe[0]);
1610 			result = -ENODEV;
1611 			goto out_free;
1612 		}
1613 
1614 		dvb->i2c_client_tuner = client;
1615 		break;
1616 	}
1617 	case EM2874_BOARD_PCTV_HD_MINI_80E:
1618 		dvb->fe[0] = dvb_attach(drx39xxj_attach, &dev->i2c_adap[dev->def_i2c_bus]);
1619 		if (dvb->fe[0] != NULL) {
1620 			dvb->fe[0] = dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1621 						&dev->i2c_adap[dev->def_i2c_bus],
1622 						&pinnacle_80e_dvb_config);
1623 			if (!dvb->fe[0]) {
1624 				result = -EINVAL;
1625 				goto out_free;
1626 			}
1627 		}
1628 		break;
1629 	case EM28178_BOARD_PCTV_461E: {
1630 		struct i2c_client *client;
1631 		struct i2c_adapter *i2c_adapter;
1632 		struct i2c_board_info board_info;
1633 		struct m88ds3103_platform_data m88ds3103_pdata = {};
1634 		struct ts2020_config ts2020_config = {};
1635 		struct a8293_platform_data a8293_pdata = {};
1636 
1637 		/* attach demod */
1638 		m88ds3103_pdata.clk = 27000000;
1639 		m88ds3103_pdata.i2c_wr_max = 33;
1640 		m88ds3103_pdata.ts_mode = M88DS3103_TS_PARALLEL;
1641 		m88ds3103_pdata.ts_clk = 16000;
1642 		m88ds3103_pdata.ts_clk_pol = 1;
1643 		m88ds3103_pdata.agc = 0x99;
1644 		memset(&board_info, 0, sizeof(board_info));
1645 		strlcpy(board_info.type, "m88ds3103", I2C_NAME_SIZE);
1646 		board_info.addr = 0x68;
1647 		board_info.platform_data = &m88ds3103_pdata;
1648 		request_module("m88ds3103");
1649 		client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &board_info);
1650 		if (client == NULL || client->dev.driver == NULL) {
1651 			result = -ENODEV;
1652 			goto out_free;
1653 		}
1654 		if (!try_module_get(client->dev.driver->owner)) {
1655 			i2c_unregister_device(client);
1656 			result = -ENODEV;
1657 			goto out_free;
1658 		}
1659 		dvb->fe[0] = m88ds3103_pdata.get_dvb_frontend(client);
1660 		i2c_adapter = m88ds3103_pdata.get_i2c_adapter(client);
1661 		dvb->i2c_client_demod = client;
1662 
1663 		/* attach tuner */
1664 		ts2020_config.fe = dvb->fe[0];
1665 		memset(&board_info, 0, sizeof(board_info));
1666 		strlcpy(board_info.type, "ts2022", I2C_NAME_SIZE);
1667 		board_info.addr = 0x60;
1668 		board_info.platform_data = &ts2020_config;
1669 		request_module("ts2020");
1670 		client = i2c_new_device(i2c_adapter, &board_info);
1671 		if (client == NULL || client->dev.driver == NULL) {
1672 			module_put(dvb->i2c_client_demod->dev.driver->owner);
1673 			i2c_unregister_device(dvb->i2c_client_demod);
1674 			result = -ENODEV;
1675 			goto out_free;
1676 		}
1677 		if (!try_module_get(client->dev.driver->owner)) {
1678 			i2c_unregister_device(client);
1679 			module_put(dvb->i2c_client_demod->dev.driver->owner);
1680 			i2c_unregister_device(dvb->i2c_client_demod);
1681 			result = -ENODEV;
1682 			goto out_free;
1683 		}
1684 		dvb->i2c_client_tuner = client;
1685 		/* delegate signal strength measurement to tuner */
1686 		dvb->fe[0]->ops.read_signal_strength =
1687 				dvb->fe[0]->ops.tuner_ops.get_rf_strength;
1688 
1689 		/* attach SEC */
1690 		a8293_pdata.dvb_frontend = dvb->fe[0];
1691 		memset(&board_info, 0, sizeof(board_info));
1692 		strlcpy(board_info.type, "a8293", I2C_NAME_SIZE);
1693 		board_info.addr = 0x08;
1694 		board_info.platform_data = &a8293_pdata;
1695 		request_module("a8293");
1696 		client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &board_info);
1697 		if (client == NULL || client->dev.driver == NULL) {
1698 			module_put(dvb->i2c_client_tuner->dev.driver->owner);
1699 			i2c_unregister_device(dvb->i2c_client_tuner);
1700 			module_put(dvb->i2c_client_demod->dev.driver->owner);
1701 			i2c_unregister_device(dvb->i2c_client_demod);
1702 			result = -ENODEV;
1703 			goto out_free;
1704 		}
1705 		if (!try_module_get(client->dev.driver->owner)) {
1706 			i2c_unregister_device(client);
1707 			module_put(dvb->i2c_client_tuner->dev.driver->owner);
1708 			i2c_unregister_device(dvb->i2c_client_tuner);
1709 			module_put(dvb->i2c_client_demod->dev.driver->owner);
1710 			i2c_unregister_device(dvb->i2c_client_demod);
1711 			result = -ENODEV;
1712 			goto out_free;
1713 		}
1714 		dvb->i2c_client_sec = client;
1715 		break;
1716 	}
1717 	case EM28178_BOARD_PCTV_292E:
1718 		{
1719 			struct i2c_adapter *adapter;
1720 			struct i2c_client *client;
1721 			struct i2c_board_info info;
1722 			struct si2168_config si2168_config;
1723 			struct si2157_config si2157_config;
1724 
1725 			/* attach demod */
1726 			memset(&si2168_config, 0, sizeof(si2168_config));
1727 			si2168_config.i2c_adapter = &adapter;
1728 			si2168_config.fe = &dvb->fe[0];
1729 			si2168_config.ts_mode = SI2168_TS_PARALLEL;
1730 			memset(&info, 0, sizeof(struct i2c_board_info));
1731 			strlcpy(info.type, "si2168", I2C_NAME_SIZE);
1732 			info.addr = 0x64;
1733 			info.platform_data = &si2168_config;
1734 			request_module(info.type);
1735 			client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &info);
1736 			if (client == NULL || client->dev.driver == NULL) {
1737 				result = -ENODEV;
1738 				goto out_free;
1739 			}
1740 
1741 			if (!try_module_get(client->dev.driver->owner)) {
1742 				i2c_unregister_device(client);
1743 				result = -ENODEV;
1744 				goto out_free;
1745 			}
1746 
1747 			dvb->i2c_client_demod = client;
1748 
1749 			/* attach tuner */
1750 			memset(&si2157_config, 0, sizeof(si2157_config));
1751 			si2157_config.fe = dvb->fe[0];
1752 			si2157_config.if_port = 1;
1753 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
1754 			si2157_config.mdev = dev->media_dev;
1755 #endif
1756 			memset(&info, 0, sizeof(struct i2c_board_info));
1757 			strlcpy(info.type, "si2157", I2C_NAME_SIZE);
1758 			info.addr = 0x60;
1759 			info.platform_data = &si2157_config;
1760 			request_module(info.type);
1761 			client = i2c_new_device(adapter, &info);
1762 			if (client == NULL || client->dev.driver == NULL) {
1763 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1764 				i2c_unregister_device(dvb->i2c_client_demod);
1765 				result = -ENODEV;
1766 				goto out_free;
1767 			}
1768 
1769 			if (!try_module_get(client->dev.driver->owner)) {
1770 				i2c_unregister_device(client);
1771 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1772 				i2c_unregister_device(dvb->i2c_client_demod);
1773 				result = -ENODEV;
1774 				goto out_free;
1775 			}
1776 
1777 			dvb->i2c_client_tuner = client;
1778 			dvb->fe[0]->ops.set_lna = em28xx_pctv_292e_set_lna;
1779 		}
1780 		break;
1781 	case EM28178_BOARD_TERRATEC_T2_STICK_HD:
1782 		{
1783 			struct i2c_adapter *adapter;
1784 			struct i2c_client *client;
1785 			struct i2c_board_info info;
1786 			struct si2168_config si2168_config;
1787 			struct si2157_config si2157_config;
1788 
1789 			/* attach demod */
1790 			memset(&si2168_config, 0, sizeof(si2168_config));
1791 			si2168_config.i2c_adapter = &adapter;
1792 			si2168_config.fe = &dvb->fe[0];
1793 			si2168_config.ts_mode = SI2168_TS_PARALLEL;
1794 			memset(&info, 0, sizeof(struct i2c_board_info));
1795 			strlcpy(info.type, "si2168", I2C_NAME_SIZE);
1796 			info.addr = 0x64;
1797 			info.platform_data = &si2168_config;
1798 			request_module(info.type);
1799 			client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &info);
1800 			if (client == NULL || client->dev.driver == NULL) {
1801 				result = -ENODEV;
1802 				goto out_free;
1803 			}
1804 
1805 			if (!try_module_get(client->dev.driver->owner)) {
1806 				i2c_unregister_device(client);
1807 				result = -ENODEV;
1808 				goto out_free;
1809 			}
1810 
1811 			dvb->i2c_client_demod = client;
1812 
1813 			/* attach tuner */
1814 			memset(&si2157_config, 0, sizeof(si2157_config));
1815 			si2157_config.fe = dvb->fe[0];
1816 			si2157_config.if_port = 0;
1817 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
1818 			si2157_config.mdev = dev->media_dev;
1819 #endif
1820 			memset(&info, 0, sizeof(struct i2c_board_info));
1821 			strlcpy(info.type, "si2146", I2C_NAME_SIZE);
1822 			info.addr = 0x60;
1823 			info.platform_data = &si2157_config;
1824 			request_module("si2157");
1825 			client = i2c_new_device(adapter, &info);
1826 			if (client == NULL || client->dev.driver == NULL) {
1827 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1828 				i2c_unregister_device(dvb->i2c_client_demod);
1829 				result = -ENODEV;
1830 				goto out_free;
1831 			}
1832 
1833 			if (!try_module_get(client->dev.driver->owner)) {
1834 				i2c_unregister_device(client);
1835 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1836 				i2c_unregister_device(dvb->i2c_client_demod);
1837 				result = -ENODEV;
1838 				goto out_free;
1839 			}
1840 
1841 			dvb->i2c_client_tuner = client;
1842 		}
1843 		break;
1844 
1845 	case EM28178_BOARD_PLEX_PX_BCUD:
1846 		{
1847 			struct i2c_client *client;
1848 			struct i2c_board_info info;
1849 			struct tc90522_config tc90522_config;
1850 			struct qm1d1c0042_config qm1d1c0042_config;
1851 
1852 			/* attach demod */
1853 			memset(&tc90522_config, 0, sizeof(tc90522_config));
1854 			memset(&info, 0, sizeof(struct i2c_board_info));
1855 			strlcpy(info.type, "tc90522sat", I2C_NAME_SIZE);
1856 			info.addr = 0x15;
1857 			info.platform_data = &tc90522_config;
1858 			request_module("tc90522");
1859 			client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &info);
1860 			if (client == NULL || client->dev.driver == NULL) {
1861 				result = -ENODEV;
1862 				goto out_free;
1863 			}
1864 			dvb->i2c_client_demod = client;
1865 			if (!try_module_get(client->dev.driver->owner)) {
1866 				i2c_unregister_device(client);
1867 				result = -ENODEV;
1868 				goto out_free;
1869 			}
1870 
1871 			/* attach tuner */
1872 			memset(&qm1d1c0042_config, 0,
1873 			       sizeof(qm1d1c0042_config));
1874 			qm1d1c0042_config.fe = tc90522_config.fe;
1875 			qm1d1c0042_config.lpf = 1;
1876 			memset(&info, 0, sizeof(struct i2c_board_info));
1877 			strlcpy(info.type, "qm1d1c0042", I2C_NAME_SIZE);
1878 			info.addr = 0x61;
1879 			info.platform_data = &qm1d1c0042_config;
1880 			request_module(info.type);
1881 			client = i2c_new_device(tc90522_config.tuner_i2c,
1882 						&info);
1883 			if (client == NULL || client->dev.driver == NULL) {
1884 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1885 				i2c_unregister_device(dvb->i2c_client_demod);
1886 				result = -ENODEV;
1887 				goto out_free;
1888 			}
1889 			dvb->i2c_client_tuner = client;
1890 			if (!try_module_get(client->dev.driver->owner)) {
1891 				i2c_unregister_device(client);
1892 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1893 				i2c_unregister_device(dvb->i2c_client_demod);
1894 				result = -ENODEV;
1895 				goto out_free;
1896 			}
1897 			dvb->fe[0] = tc90522_config.fe;
1898 			px_bcud_init(dev);
1899 		}
1900 		break;
1901 	case EM28174_BOARD_HAUPPAUGE_WINTV_DUALHD_DVB:
1902 		{
1903 			struct i2c_adapter *adapter;
1904 			struct i2c_client *client;
1905 			struct i2c_board_info info;
1906 			struct si2168_config si2168_config;
1907 			struct si2157_config si2157_config;
1908 
1909 			/* attach demod */
1910 			memset(&si2168_config, 0, sizeof(si2168_config));
1911 			si2168_config.i2c_adapter = &adapter;
1912 			si2168_config.fe = &dvb->fe[0];
1913 			si2168_config.ts_mode = SI2168_TS_SERIAL;
1914 			memset(&info, 0, sizeof(struct i2c_board_info));
1915 			strlcpy(info.type, "si2168", I2C_NAME_SIZE);
1916 			info.addr = 0x64;
1917 			info.platform_data = &si2168_config;
1918 			request_module(info.type);
1919 			client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &info);
1920 			if (client == NULL || client->dev.driver == NULL) {
1921 				result = -ENODEV;
1922 				goto out_free;
1923 			}
1924 
1925 			if (!try_module_get(client->dev.driver->owner)) {
1926 				i2c_unregister_device(client);
1927 				result = -ENODEV;
1928 				goto out_free;
1929 			}
1930 
1931 			dvb->i2c_client_demod = client;
1932 
1933 			/* attach tuner */
1934 			memset(&si2157_config, 0, sizeof(si2157_config));
1935 			si2157_config.fe = dvb->fe[0];
1936 			si2157_config.if_port = 1;
1937 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
1938 			si2157_config.mdev = dev->media_dev;
1939 #endif
1940 			memset(&info, 0, sizeof(struct i2c_board_info));
1941 			strlcpy(info.type, "si2157", I2C_NAME_SIZE);
1942 			info.addr = 0x60;
1943 			info.platform_data = &si2157_config;
1944 			request_module(info.type);
1945 			client = i2c_new_device(adapter, &info);
1946 			if (client == NULL || client->dev.driver == NULL) {
1947 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1948 				i2c_unregister_device(dvb->i2c_client_demod);
1949 				result = -ENODEV;
1950 				goto out_free;
1951 			}
1952 
1953 			if (!try_module_get(client->dev.driver->owner)) {
1954 				i2c_unregister_device(client);
1955 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1956 				i2c_unregister_device(dvb->i2c_client_demod);
1957 				result = -ENODEV;
1958 				goto out_free;
1959 			}
1960 
1961 			dvb->i2c_client_tuner = client;
1962 
1963 		}
1964 		break;
1965 	case EM28174_BOARD_HAUPPAUGE_WINTV_DUALHD_01595:
1966 		{
1967 			struct i2c_adapter *adapter;
1968 			struct i2c_client *client;
1969 			struct i2c_board_info info = {};
1970 			struct lgdt3306a_config lgdt3306a_config;
1971 			struct si2157_config si2157_config = {};
1972 
1973 			/* attach demod */
1974 			lgdt3306a_config = hauppauge_01595_lgdt3306a_config;
1975 			lgdt3306a_config.fe = &dvb->fe[0];
1976 			lgdt3306a_config.i2c_adapter = &adapter;
1977 			strlcpy(info.type, "lgdt3306a", sizeof(info.type));
1978 			info.addr = 0x59;
1979 			info.platform_data = &lgdt3306a_config;
1980 			request_module(info.type);
1981 			client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus],
1982 					&info);
1983 			if (client == NULL || client->dev.driver == NULL) {
1984 				result = -ENODEV;
1985 				goto out_free;
1986 			}
1987 
1988 			if (!try_module_get(client->dev.driver->owner)) {
1989 				i2c_unregister_device(client);
1990 				result = -ENODEV;
1991 				goto out_free;
1992 			}
1993 
1994 			dvb->i2c_client_demod = client;
1995 
1996 			/* attach tuner */
1997 			si2157_config.fe = dvb->fe[0];
1998 			si2157_config.if_port = 1;
1999 			si2157_config.inversion = 1;
2000 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2001 			si2157_config.mdev = dev->media_dev;
2002 #endif
2003 			memset(&info, 0, sizeof(struct i2c_board_info));
2004 			strlcpy(info.type, "si2157", sizeof(info.type));
2005 			info.addr = 0x60;
2006 			info.platform_data = &si2157_config;
2007 			request_module(info.type);
2008 
2009 			client = i2c_new_device(adapter, &info);
2010 			if (client == NULL || client->dev.driver == NULL) {
2011 				module_put(dvb->i2c_client_demod->dev.driver->owner);
2012 				i2c_unregister_device(dvb->i2c_client_demod);
2013 				result = -ENODEV;
2014 				goto out_free;
2015 			}
2016 			if (!try_module_get(client->dev.driver->owner)) {
2017 				i2c_unregister_device(client);
2018 				module_put(dvb->i2c_client_demod->dev.driver->owner);
2019 				i2c_unregister_device(dvb->i2c_client_demod);
2020 				result = -ENODEV;
2021 				goto out_free;
2022 			}
2023 
2024 			dvb->i2c_client_tuner = client;
2025 		}
2026 		break;
2027 	default:
2028 		dev_err(&dev->intf->dev,
2029 			"The frontend of your DVB/ATSC card isn't supported yet\n");
2030 		break;
2031 	}
2032 	if (NULL == dvb->fe[0]) {
2033 		dev_err(&dev->intf->dev, "frontend initialization failed\n");
2034 		result = -EINVAL;
2035 		goto out_free;
2036 	}
2037 	/* define general-purpose callback pointer */
2038 	dvb->fe[0]->callback = em28xx_tuner_callback;
2039 	if (dvb->fe[1])
2040 		dvb->fe[1]->callback = em28xx_tuner_callback;
2041 
2042 	/* register everything */
2043 	result = em28xx_register_dvb(dvb, THIS_MODULE, dev, &dev->intf->dev);
2044 
2045 	if (result < 0)
2046 		goto out_free;
2047 
2048 	dev_info(&dev->intf->dev, "DVB extension successfully initialized\n");
2049 
2050 	kref_get(&dev->ref);
2051 
2052 ret:
2053 	em28xx_set_mode(dev, EM28XX_SUSPEND);
2054 	mutex_unlock(&dev->lock);
2055 	return result;
2056 
2057 out_free:
2058 	kfree(dvb);
2059 	dev->dvb = NULL;
2060 	goto ret;
2061 }
2062 
2063 static inline void prevent_sleep(struct dvb_frontend_ops *ops)
2064 {
2065 	ops->set_voltage = NULL;
2066 	ops->sleep = NULL;
2067 	ops->tuner_ops.sleep = NULL;
2068 }
2069 
2070 static int em28xx_dvb_fini(struct em28xx *dev)
2071 {
2072 	struct em28xx_dvb *dvb;
2073 	struct i2c_client *client;
2074 
2075 	if (dev->is_audio_only) {
2076 		/* Shouldn't initialize IR for this interface */
2077 		return 0;
2078 	}
2079 
2080 	if (!dev->board.has_dvb) {
2081 		/* This device does not support the extension */
2082 		return 0;
2083 	}
2084 
2085 	if (!dev->dvb)
2086 		return 0;
2087 
2088 	dev_info(&dev->intf->dev, "Closing DVB extension\n");
2089 
2090 	dvb = dev->dvb;
2091 
2092 	em28xx_uninit_usb_xfer(dev, EM28XX_DIGITAL_MODE);
2093 
2094 	if (dev->disconnected) {
2095 		/* We cannot tell the device to sleep
2096 		 * once it has been unplugged. */
2097 		if (dvb->fe[0]) {
2098 			prevent_sleep(&dvb->fe[0]->ops);
2099 			dvb->fe[0]->exit = DVB_FE_DEVICE_REMOVED;
2100 		}
2101 		if (dvb->fe[1]) {
2102 			prevent_sleep(&dvb->fe[1]->ops);
2103 			dvb->fe[1]->exit = DVB_FE_DEVICE_REMOVED;
2104 		}
2105 	}
2106 
2107 	/* remove I2C SEC */
2108 	client = dvb->i2c_client_sec;
2109 	if (client) {
2110 		module_put(client->dev.driver->owner);
2111 		i2c_unregister_device(client);
2112 	}
2113 
2114 	/* remove I2C tuner */
2115 	client = dvb->i2c_client_tuner;
2116 	if (client) {
2117 		module_put(client->dev.driver->owner);
2118 		i2c_unregister_device(client);
2119 	}
2120 
2121 	/* remove I2C demod */
2122 	client = dvb->i2c_client_demod;
2123 	if (client) {
2124 		module_put(client->dev.driver->owner);
2125 		i2c_unregister_device(client);
2126 	}
2127 
2128 	em28xx_unregister_dvb(dvb);
2129 	kfree(dvb);
2130 	dev->dvb = NULL;
2131 	kref_put(&dev->ref, em28xx_free_device);
2132 
2133 	return 0;
2134 }
2135 
2136 static int em28xx_dvb_suspend(struct em28xx *dev)
2137 {
2138 	int ret = 0;
2139 
2140 	if (dev->is_audio_only)
2141 		return 0;
2142 
2143 	if (!dev->board.has_dvb)
2144 		return 0;
2145 
2146 	dev_info(&dev->intf->dev, "Suspending DVB extension\n");
2147 	if (dev->dvb) {
2148 		struct em28xx_dvb *dvb = dev->dvb;
2149 
2150 		if (dvb->fe[0]) {
2151 			ret = dvb_frontend_suspend(dvb->fe[0]);
2152 			dev_info(&dev->intf->dev, "fe0 suspend %d\n", ret);
2153 		}
2154 		if (dvb->fe[1]) {
2155 			dvb_frontend_suspend(dvb->fe[1]);
2156 			dev_info(&dev->intf->dev, "fe1 suspend %d\n", ret);
2157 		}
2158 	}
2159 
2160 	return 0;
2161 }
2162 
2163 static int em28xx_dvb_resume(struct em28xx *dev)
2164 {
2165 	int ret = 0;
2166 
2167 	if (dev->is_audio_only)
2168 		return 0;
2169 
2170 	if (!dev->board.has_dvb)
2171 		return 0;
2172 
2173 	dev_info(&dev->intf->dev, "Resuming DVB extension\n");
2174 	if (dev->dvb) {
2175 		struct em28xx_dvb *dvb = dev->dvb;
2176 
2177 		if (dvb->fe[0]) {
2178 			ret = dvb_frontend_resume(dvb->fe[0]);
2179 			dev_info(&dev->intf->dev, "fe0 resume %d\n", ret);
2180 		}
2181 
2182 		if (dvb->fe[1]) {
2183 			ret = dvb_frontend_resume(dvb->fe[1]);
2184 			dev_info(&dev->intf->dev, "fe1 resume %d\n", ret);
2185 		}
2186 	}
2187 
2188 	return 0;
2189 }
2190 
2191 static struct em28xx_ops dvb_ops = {
2192 	.id   = EM28XX_DVB,
2193 	.name = "Em28xx dvb Extension",
2194 	.init = em28xx_dvb_init,
2195 	.fini = em28xx_dvb_fini,
2196 	.suspend = em28xx_dvb_suspend,
2197 	.resume = em28xx_dvb_resume,
2198 };
2199 
2200 static int __init em28xx_dvb_register(void)
2201 {
2202 	return em28xx_register_extension(&dvb_ops);
2203 }
2204 
2205 static void __exit em28xx_dvb_unregister(void)
2206 {
2207 	em28xx_unregister_extension(&dvb_ops);
2208 }
2209 
2210 module_init(em28xx_dvb_register);
2211 module_exit(em28xx_dvb_unregister);
2212