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 <linux/kernel.h>
25 #include <linux/slab.h>
26 #include <linux/usb.h>
27 
28 #include "em28xx.h"
29 #include <media/v4l2-common.h>
30 #include <dvb_demux.h>
31 #include <dvb_net.h>
32 #include <dmxdev.h>
33 #include <media/tuner.h>
34 #include "tuner-simple.h"
35 #include <linux/gpio.h>
36 
37 #include "lgdt330x.h"
38 #include "lgdt3305.h"
39 #include "zl10353.h"
40 #include "s5h1409.h"
41 #include "mt352.h"
42 #include "mt352_priv.h" /* FIXME */
43 #include "tda1002x.h"
44 #include "drx39xyj/drx39xxj.h"
45 #include "tda18271.h"
46 #include "s921.h"
47 #include "drxd.h"
48 #include "cxd2820r.h"
49 #include "tda18271c2dd.h"
50 #include "drxk.h"
51 #include "tda10071.h"
52 #include "tda18212.h"
53 #include "a8293.h"
54 #include "qt1010.h"
55 #include "mb86a20s.h"
56 #include "m88ds3103.h"
57 #include "m88ts2022.h"
58 #include "si2168.h"
59 #include "si2157.h"
60 
61 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
62 MODULE_LICENSE("GPL");
63 MODULE_DESCRIPTION(DRIVER_DESC " - digital TV interface");
64 MODULE_VERSION(EM28XX_VERSION);
65 
66 
67 static unsigned int debug;
68 module_param(debug, int, 0644);
69 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
70 
71 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
72 
73 #define dprintk(level, fmt, arg...) do {			\
74 if (debug >= level) 						\
75 	printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg);	\
76 } while (0)
77 
78 struct em28xx_dvb {
79 	struct dvb_frontend        *fe[2];
80 
81 	/* feed count management */
82 	struct mutex               lock;
83 	int                        nfeeds;
84 
85 	/* general boilerplate stuff */
86 	struct dvb_adapter         adapter;
87 	struct dvb_demux           demux;
88 	struct dmxdev              dmxdev;
89 	struct dmx_frontend        fe_hw;
90 	struct dmx_frontend        fe_mem;
91 	struct dvb_net             net;
92 
93 	/* Due to DRX-K - probably need changes */
94 	int (*gate_ctrl)(struct dvb_frontend *, int);
95 	struct semaphore      pll_mutex;
96 	bool			dont_attach_fe1;
97 	int			lna_gpio;
98 	struct i2c_client	*i2c_client_demod;
99 	struct i2c_client	*i2c_client_tuner;
100 };
101 
102 
103 static inline void print_err_status(struct em28xx *dev,
104 				     int packet, int status)
105 {
106 	char *errmsg = "Unknown";
107 
108 	switch (status) {
109 	case -ENOENT:
110 		errmsg = "unlinked synchronuously";
111 		break;
112 	case -ECONNRESET:
113 		errmsg = "unlinked asynchronuously";
114 		break;
115 	case -ENOSR:
116 		errmsg = "Buffer error (overrun)";
117 		break;
118 	case -EPIPE:
119 		errmsg = "Stalled (device not responding)";
120 		break;
121 	case -EOVERFLOW:
122 		errmsg = "Babble (bad cable?)";
123 		break;
124 	case -EPROTO:
125 		errmsg = "Bit-stuff error (bad cable?)";
126 		break;
127 	case -EILSEQ:
128 		errmsg = "CRC/Timeout (could be anything)";
129 		break;
130 	case -ETIME:
131 		errmsg = "Device does not respond";
132 		break;
133 	}
134 	if (packet < 0) {
135 		dprintk(1, "URB status %d [%s].\n", status, errmsg);
136 	} else {
137 		dprintk(1, "URB packet %d, status %d [%s].\n",
138 			packet, status, errmsg);
139 	}
140 }
141 
142 static inline int em28xx_dvb_urb_data_copy(struct em28xx *dev, struct urb *urb)
143 {
144 	int xfer_bulk, num_packets, i;
145 
146 	if (!dev)
147 		return 0;
148 
149 	if (dev->disconnected)
150 		return 0;
151 
152 	if (urb->status < 0)
153 		print_err_status(dev, -1, urb->status);
154 
155 	xfer_bulk = usb_pipebulk(urb->pipe);
156 
157 	if (xfer_bulk) /* bulk */
158 		num_packets = 1;
159 	else /* isoc */
160 		num_packets = urb->number_of_packets;
161 
162 	for (i = 0; i < num_packets; i++) {
163 		if (xfer_bulk) {
164 			if (urb->status < 0) {
165 				print_err_status(dev, i, urb->status);
166 				if (urb->status != -EPROTO)
167 					continue;
168 			}
169 			if (!urb->actual_length)
170 				continue;
171 			dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
172 					urb->actual_length);
173 		} else {
174 			if (urb->iso_frame_desc[i].status < 0) {
175 				print_err_status(dev, i,
176 						 urb->iso_frame_desc[i].status);
177 				if (urb->iso_frame_desc[i].status != -EPROTO)
178 					continue;
179 			}
180 			if (!urb->iso_frame_desc[i].actual_length)
181 				continue;
182 			dvb_dmx_swfilter(&dev->dvb->demux,
183 					 urb->transfer_buffer +
184 					 urb->iso_frame_desc[i].offset,
185 					 urb->iso_frame_desc[i].actual_length);
186 		}
187 	}
188 
189 	return 0;
190 }
191 
192 static int em28xx_start_streaming(struct em28xx_dvb *dvb)
193 {
194 	int rc;
195 	struct em28xx_i2c_bus *i2c_bus = dvb->adapter.priv;
196 	struct em28xx *dev = i2c_bus->dev;
197 	int dvb_max_packet_size, packet_multiplier, dvb_alt;
198 
199 	if (dev->dvb_xfer_bulk) {
200 		if (!dev->dvb_ep_bulk)
201 			return -ENODEV;
202 		dvb_max_packet_size = 512; /* USB 2.0 spec */
203 		packet_multiplier = EM28XX_DVB_BULK_PACKET_MULTIPLIER;
204 		dvb_alt = 0;
205 	} else { /* isoc */
206 		if (!dev->dvb_ep_isoc)
207 			return -ENODEV;
208 		dvb_max_packet_size = dev->dvb_max_pkt_size_isoc;
209 		if (dvb_max_packet_size < 0)
210 			return dvb_max_packet_size;
211 		packet_multiplier = EM28XX_DVB_NUM_ISOC_PACKETS;
212 		dvb_alt = dev->dvb_alt_isoc;
213 	}
214 
215 	usb_set_interface(dev->udev, dev->ifnum, dvb_alt);
216 	rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
217 	if (rc < 0)
218 		return rc;
219 
220 	dprintk(1, "Using %d buffers each with %d x %d bytes, alternate %d\n",
221 		EM28XX_DVB_NUM_BUFS,
222 		packet_multiplier,
223 		dvb_max_packet_size, dvb_alt);
224 
225 	return em28xx_init_usb_xfer(dev, EM28XX_DIGITAL_MODE,
226 				    dev->dvb_xfer_bulk,
227 				    EM28XX_DVB_NUM_BUFS,
228 				    dvb_max_packet_size,
229 				    packet_multiplier,
230 				    em28xx_dvb_urb_data_copy);
231 }
232 
233 static int em28xx_stop_streaming(struct em28xx_dvb *dvb)
234 {
235 	struct em28xx_i2c_bus *i2c_bus = dvb->adapter.priv;
236 	struct em28xx *dev = i2c_bus->dev;
237 
238 	em28xx_stop_urbs(dev);
239 
240 	return 0;
241 }
242 
243 static int em28xx_start_feed(struct dvb_demux_feed *feed)
244 {
245 	struct dvb_demux *demux  = feed->demux;
246 	struct em28xx_dvb *dvb = demux->priv;
247 	int rc, ret;
248 
249 	if (!demux->dmx.frontend)
250 		return -EINVAL;
251 
252 	mutex_lock(&dvb->lock);
253 	dvb->nfeeds++;
254 	rc = dvb->nfeeds;
255 
256 	if (dvb->nfeeds == 1) {
257 		ret = em28xx_start_streaming(dvb);
258 		if (ret < 0)
259 			rc = ret;
260 	}
261 
262 	mutex_unlock(&dvb->lock);
263 	return rc;
264 }
265 
266 static int em28xx_stop_feed(struct dvb_demux_feed *feed)
267 {
268 	struct dvb_demux *demux  = feed->demux;
269 	struct em28xx_dvb *dvb = demux->priv;
270 	int err = 0;
271 
272 	mutex_lock(&dvb->lock);
273 	dvb->nfeeds--;
274 
275 	if (0 == dvb->nfeeds)
276 		err = em28xx_stop_streaming(dvb);
277 
278 	mutex_unlock(&dvb->lock);
279 	return err;
280 }
281 
282 
283 
284 /* ------------------------------------------------------------------ */
285 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
286 {
287 	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
288 	struct em28xx *dev = i2c_bus->dev;
289 
290 	if (acquire)
291 		return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
292 	else
293 		return em28xx_set_mode(dev, EM28XX_SUSPEND);
294 }
295 
296 /* ------------------------------------------------------------------ */
297 
298 static struct lgdt330x_config em2880_lgdt3303_dev = {
299 	.demod_address = 0x0e,
300 	.demod_chip = LGDT3303,
301 };
302 
303 static struct lgdt3305_config em2870_lgdt3304_dev = {
304 	.i2c_addr           = 0x0e,
305 	.demod_chip         = LGDT3304,
306 	.spectral_inversion = 1,
307 	.deny_i2c_rptr      = 1,
308 	.mpeg_mode          = LGDT3305_MPEG_PARALLEL,
309 	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
310 	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
311 	.vsb_if_khz         = 3250,
312 	.qam_if_khz         = 4000,
313 };
314 
315 static struct lgdt3305_config em2874_lgdt3305_dev = {
316 	.i2c_addr           = 0x0e,
317 	.demod_chip         = LGDT3305,
318 	.spectral_inversion = 1,
319 	.deny_i2c_rptr      = 0,
320 	.mpeg_mode          = LGDT3305_MPEG_SERIAL,
321 	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
322 	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
323 	.vsb_if_khz         = 3250,
324 	.qam_if_khz         = 4000,
325 };
326 
327 static struct lgdt3305_config em2874_lgdt3305_nogate_dev = {
328 	.i2c_addr           = 0x0e,
329 	.demod_chip         = LGDT3305,
330 	.spectral_inversion = 1,
331 	.deny_i2c_rptr      = 1,
332 	.mpeg_mode          = LGDT3305_MPEG_SERIAL,
333 	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
334 	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
335 	.vsb_if_khz         = 3600,
336 	.qam_if_khz         = 3600,
337 };
338 
339 static struct s921_config sharp_isdbt = {
340 	.demod_address = 0x30 >> 1
341 };
342 
343 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
344 	.demod_address = (0x1e >> 1),
345 	.no_tuner = 1,
346 	.parallel_ts = 1,
347 	.if2 = 45600,
348 };
349 
350 static struct s5h1409_config em28xx_s5h1409_with_xc3028 = {
351 	.demod_address = 0x32 >> 1,
352 	.output_mode   = S5H1409_PARALLEL_OUTPUT,
353 	.gpio          = S5H1409_GPIO_OFF,
354 	.inversion     = S5H1409_INVERSION_OFF,
355 	.status_mode   = S5H1409_DEMODLOCKING,
356 	.mpeg_timing   = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK
357 };
358 
359 static struct tda18271_std_map kworld_a340_std_map = {
360 	.atsc_6   = { .if_freq = 3250, .agc_mode = 3, .std = 0,
361 		      .if_lvl = 1, .rfagc_top = 0x37, },
362 	.qam_6    = { .if_freq = 4000, .agc_mode = 3, .std = 1,
363 		      .if_lvl = 1, .rfagc_top = 0x37, },
364 };
365 
366 static struct tda18271_config kworld_a340_config = {
367 	.std_map           = &kworld_a340_std_map,
368 };
369 
370 static struct tda18271_config kworld_ub435q_v2_config = {
371 	.std_map	= &kworld_a340_std_map,
372 	.gate		= TDA18271_GATE_DIGITAL,
373 };
374 
375 static struct tda18212_config kworld_ub435q_v3_config = {
376 	.i2c_address	= 0x60,
377 	.if_atsc_vsb	= 3600,
378 	.if_atsc_qam	= 3600,
379 };
380 
381 static struct zl10353_config em28xx_zl10353_xc3028_no_i2c_gate = {
382 	.demod_address = (0x1e >> 1),
383 	.no_tuner = 1,
384 	.disable_i2c_gate_ctrl = 1,
385 	.parallel_ts = 1,
386 	.if2 = 45600,
387 };
388 
389 static struct drxd_config em28xx_drxd = {
390 	.demod_address = 0x70,
391 	.demod_revision = 0xa2,
392 	.pll_type = DRXD_PLL_NONE,
393 	.clock = 12000,
394 	.insert_rs_byte = 1,
395 	.IF = 42800000,
396 	.disable_i2c_gate_ctrl = 1,
397 };
398 
399 static struct drxk_config terratec_h5_drxk = {
400 	.adr = 0x29,
401 	.single_master = 1,
402 	.no_i2c_bridge = 1,
403 	.microcode_name = "dvb-usb-terratec-h5-drxk.fw",
404 	.qam_demod_parameter_count = 2,
405 };
406 
407 static struct drxk_config hauppauge_930c_drxk = {
408 	.adr = 0x29,
409 	.single_master = 1,
410 	.no_i2c_bridge = 1,
411 	.microcode_name = "dvb-usb-hauppauge-hvr930c-drxk.fw",
412 	.chunk_size = 56,
413 	.qam_demod_parameter_count = 2,
414 };
415 
416 static struct drxk_config terratec_htc_stick_drxk = {
417 	.adr = 0x29,
418 	.single_master = 1,
419 	.no_i2c_bridge = 1,
420 	.microcode_name = "dvb-usb-terratec-htc-stick-drxk.fw",
421 	.chunk_size = 54,
422 	.qam_demod_parameter_count = 2,
423 	/* Required for the antenna_gpio to disable LNA. */
424 	.antenna_dvbt = true,
425 	/* The windows driver uses the same. This will disable LNA. */
426 	.antenna_gpio = 0x6,
427 };
428 
429 static struct drxk_config maxmedia_ub425_tc_drxk = {
430 	.adr = 0x29,
431 	.single_master = 1,
432 	.no_i2c_bridge = 1,
433 	.microcode_name = "dvb-demod-drxk-01.fw",
434 	.chunk_size = 62,
435 	.qam_demod_parameter_count = 2,
436 };
437 
438 static struct drxk_config pctv_520e_drxk = {
439 	.adr = 0x29,
440 	.single_master = 1,
441 	.microcode_name = "dvb-demod-drxk-pctv.fw",
442 	.qam_demod_parameter_count = 2,
443 	.chunk_size = 58,
444 	.antenna_dvbt = true, /* disable LNA */
445 	.antenna_gpio = (1 << 2), /* disable LNA */
446 };
447 
448 static int drxk_gate_ctrl(struct dvb_frontend *fe, int enable)
449 {
450 	struct em28xx_dvb *dvb = fe->sec_priv;
451 	int status;
452 
453 	if (!dvb)
454 		return -EINVAL;
455 
456 	if (enable) {
457 		down(&dvb->pll_mutex);
458 		status = dvb->gate_ctrl(fe, 1);
459 	} else {
460 		status = dvb->gate_ctrl(fe, 0);
461 		up(&dvb->pll_mutex);
462 	}
463 	return status;
464 }
465 
466 static void hauppauge_hvr930c_init(struct em28xx *dev)
467 {
468 	int i;
469 
470 	struct em28xx_reg_seq hauppauge_hvr930c_init[] = {
471 		{EM2874_R80_GPIO_P0_CTRL,	0xff,	0xff,	0x65},
472 		{EM2874_R80_GPIO_P0_CTRL,	0xfb,	0xff,	0x32},
473 		{EM2874_R80_GPIO_P0_CTRL,	0xff,	0xff,	0xb8},
474 		{	-1,			-1,	-1,	-1},
475 	};
476 	struct em28xx_reg_seq hauppauge_hvr930c_end[] = {
477 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x01},
478 		{EM2874_R80_GPIO_P0_CTRL,	0xaf,	0xff,	0x65},
479 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x76},
480 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x01},
481 		{EM2874_R80_GPIO_P0_CTRL,	0xcf,	0xff,	0x0b},
482 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x40},
483 
484 		{EM2874_R80_GPIO_P0_CTRL,	0xcf,	0xff,	0x65},
485 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x65},
486 		{EM2874_R80_GPIO_P0_CTRL,	0xcf,	0xff,	0x0b},
487 		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x65},
488 
489 		{	-1,			-1,	-1,	-1},
490 	};
491 
492 	struct {
493 		unsigned char r[4];
494 		int len;
495 	} regs[] = {
496 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
497 		{{ 0x01, 0x02 }, 2},
498 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
499 		{{ 0x01, 0x00 }, 2},
500 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
501 		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
502 		{{ 0x01, 0x00 }, 2},
503 		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
504 		{{ 0x04, 0x00 }, 2},
505 		{{ 0x00, 0x04 }, 2},
506 		{{ 0x00, 0x04, 0x00, 0x0a }, 4},
507 		{{ 0x04, 0x14 }, 2},
508 		{{ 0x04, 0x14, 0x00, 0x00 }, 4},
509 	};
510 
511 	em28xx_gpio_set(dev, hauppauge_hvr930c_init);
512 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
513 	msleep(10);
514 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
515 	msleep(10);
516 
517 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
518 
519 	for (i = 0; i < ARRAY_SIZE(regs); i++)
520 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
521 	em28xx_gpio_set(dev, hauppauge_hvr930c_end);
522 
523 	msleep(100);
524 
525 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
526 	msleep(30);
527 
528 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x45);
529 	msleep(10);
530 
531 }
532 
533 static void terratec_h5_init(struct em28xx *dev)
534 {
535 	int i;
536 	struct em28xx_reg_seq terratec_h5_init[] = {
537 		{EM2820_R08_GPIO_CTRL,		0xff,	0xff,	10},
538 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
539 		{EM2874_R80_GPIO_P0_CTRL,	0xf2,	0xff,	50},
540 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
541 		{	-1,			-1,	-1,	-1},
542 	};
543 	struct em28xx_reg_seq terratec_h5_end[] = {
544 		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	100},
545 		{EM2874_R80_GPIO_P0_CTRL,	0xa6,	0xff,	50},
546 		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	100},
547 		{	-1,			-1,	-1,	-1},
548 	};
549 	struct {
550 		unsigned char r[4];
551 		int len;
552 	} regs[] = {
553 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
554 		{{ 0x01, 0x02 }, 2},
555 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
556 		{{ 0x01, 0x00 }, 2},
557 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
558 		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
559 		{{ 0x01, 0x00 }, 2},
560 		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
561 		{{ 0x04, 0x00 }, 2},
562 		{{ 0x00, 0x04 }, 2},
563 		{{ 0x00, 0x04, 0x00, 0x0a }, 4},
564 		{{ 0x04, 0x14 }, 2},
565 		{{ 0x04, 0x14, 0x00, 0x00 }, 4},
566 	};
567 
568 	em28xx_gpio_set(dev, terratec_h5_init);
569 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
570 	msleep(10);
571 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x45);
572 	msleep(10);
573 
574 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
575 
576 	for (i = 0; i < ARRAY_SIZE(regs); i++)
577 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
578 	em28xx_gpio_set(dev, terratec_h5_end);
579 };
580 
581 static void terratec_htc_stick_init(struct em28xx *dev)
582 {
583 	int i;
584 
585 	/*
586 	 * GPIO configuration:
587 	 * 0xff: unknown (does not affect DVB-T).
588 	 * 0xf6: DRX-K (demodulator).
589 	 * 0xe6: unknown (does not affect DVB-T).
590 	 * 0xb6: unknown (does not affect DVB-T).
591 	 */
592 	struct em28xx_reg_seq terratec_htc_stick_init[] = {
593 		{EM2820_R08_GPIO_CTRL,		0xff,	0xff,	10},
594 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
595 		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	50},
596 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
597 		{	-1,			-1,	-1,	-1},
598 	};
599 	struct em28xx_reg_seq terratec_htc_stick_end[] = {
600 		{EM2874_R80_GPIO_P0_CTRL,	0xb6,	0xff,	100},
601 		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	50},
602 		{	-1,			-1,	-1,	-1},
603 	};
604 
605 	/*
606 	 * Init the analog decoder (not yet supported), but
607 	 * it's probably still a good idea.
608 	 */
609 	struct {
610 		unsigned char r[4];
611 		int len;
612 	} regs[] = {
613 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
614 		{{ 0x01, 0x02 }, 2},
615 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
616 		{{ 0x01, 0x00 }, 2},
617 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
618 	};
619 
620 	em28xx_gpio_set(dev, terratec_htc_stick_init);
621 
622 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
623 	msleep(10);
624 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
625 	msleep(10);
626 
627 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
628 
629 	for (i = 0; i < ARRAY_SIZE(regs); i++)
630 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
631 
632 	em28xx_gpio_set(dev, terratec_htc_stick_end);
633 };
634 
635 static void terratec_htc_usb_xs_init(struct em28xx *dev)
636 {
637 	int i;
638 
639 	struct em28xx_reg_seq terratec_htc_usb_xs_init[] = {
640 		{EM2820_R08_GPIO_CTRL,		0xff,	0xff,	10},
641 		{EM2874_R80_GPIO_P0_CTRL,	0xb2,	0xff,	100},
642 		{EM2874_R80_GPIO_P0_CTRL,	0xb2,	0xff,	50},
643 		{EM2874_R80_GPIO_P0_CTRL,	0xb6,	0xff,	100},
644 		{	-1,			-1,	-1,	-1},
645 	};
646 	struct em28xx_reg_seq terratec_htc_usb_xs_end[] = {
647 		{EM2874_R80_GPIO_P0_CTRL,	0xa6,	0xff,	100},
648 		{EM2874_R80_GPIO_P0_CTRL,	0xa6,	0xff,	50},
649 		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	100},
650 		{	-1,			-1,	-1,	-1},
651 	};
652 
653 	/*
654 	 * Init the analog decoder (not yet supported), but
655 	 * it's probably still a good idea.
656 	 */
657 	struct {
658 		unsigned char r[4];
659 		int len;
660 	} regs[] = {
661 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
662 		{{ 0x01, 0x02 }, 2},
663 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
664 		{{ 0x01, 0x00 }, 2},
665 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
666 		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
667 		{{ 0x01, 0x00 }, 2},
668 		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
669 		{{ 0x04, 0x00 }, 2},
670 		{{ 0x00, 0x04 }, 2},
671 		{{ 0x00, 0x04, 0x00, 0x0a }, 4},
672 		{{ 0x04, 0x14 }, 2},
673 		{{ 0x04, 0x14, 0x00, 0x00 }, 4},
674 	};
675 
676 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
677 
678 	em28xx_gpio_set(dev, terratec_htc_usb_xs_init);
679 
680 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
681 	msleep(10);
682 	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
683 	msleep(10);
684 
685 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
686 
687 	for (i = 0; i < ARRAY_SIZE(regs); i++)
688 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
689 
690 	em28xx_gpio_set(dev, terratec_htc_usb_xs_end);
691 };
692 
693 static void pctv_520e_init(struct em28xx *dev)
694 {
695 	/*
696 	 * Init AVF4910B analog decoder. Looks like I2C traffic to
697 	 * digital demodulator and tuner are routed via AVF4910B.
698 	 */
699 	int i;
700 	struct {
701 		unsigned char r[4];
702 		int len;
703 	} regs[] = {
704 		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
705 		{{ 0x01, 0x02 }, 2},
706 		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
707 		{{ 0x01, 0x00 }, 2},
708 		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
709 		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
710 		{{ 0x01, 0x00 }, 2},
711 		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
712 	};
713 
714 	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1; /* 0x41 */
715 
716 	for (i = 0; i < ARRAY_SIZE(regs); i++)
717 		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], regs[i].r, regs[i].len);
718 };
719 
720 static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe)
721 {
722 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
723 	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
724 	struct em28xx *dev = i2c_bus->dev;
725 #ifdef CONFIG_GPIOLIB
726 	struct em28xx_dvb *dvb = dev->dvb;
727 	int ret;
728 	unsigned long flags;
729 
730 	if (c->lna == 1)
731 		flags = GPIOF_OUT_INIT_HIGH; /* enable LNA */
732 	else
733 		flags = GPIOF_OUT_INIT_LOW; /* disable LNA */
734 
735 	ret = gpio_request_one(dvb->lna_gpio, flags, NULL);
736 	if (ret)
737 		em28xx_errdev("gpio request failed %d\n", ret);
738 	else
739 		gpio_free(dvb->lna_gpio);
740 
741 	return ret;
742 #else
743 	dev_warn(&dev->udev->dev, "%s: LNA control is disabled (lna=%u)\n",
744 			KBUILD_MODNAME, c->lna);
745 	return 0;
746 #endif
747 }
748 
749 static int em28xx_pctv_292e_set_lna(struct dvb_frontend *fe)
750 {
751 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
752 	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
753 	struct em28xx *dev = i2c_bus->dev;
754 	u8 lna;
755 
756 	if (c->lna == 1)
757 		lna = 0x01;
758 	else
759 		lna = 0x00;
760 
761 	return em28xx_write_reg_bits(dev, EM2874_R80_GPIO_P0_CTRL, lna, 0x01);
762 }
763 
764 static int em28xx_mt352_terratec_xs_init(struct dvb_frontend *fe)
765 {
766 	/* Values extracted from a USB trace of the Terratec Windows driver */
767 	static u8 clock_config[]   = { CLOCK_CTL,  0x38, 0x2c };
768 	static u8 reset[]          = { RESET,      0x80 };
769 	static u8 adc_ctl_1_cfg[]  = { ADC_CTL_1,  0x40 };
770 	static u8 agc_cfg[]        = { AGC_TARGET, 0x28, 0xa0 };
771 	static u8 input_freq_cfg[] = { INPUT_FREQ_1, 0x31, 0xb8 };
772 	static u8 rs_err_cfg[]     = { RS_ERR_PER_1, 0x00, 0x4d };
773 	static u8 capt_range_cfg[] = { CAPT_RANGE, 0x32 };
774 	static u8 trl_nom_cfg[]    = { TRL_NOMINAL_RATE_1, 0x64, 0x00 };
775 	static u8 tps_given_cfg[]  = { TPS_GIVEN_1, 0x40, 0x80, 0x50 };
776 	static u8 tuner_go[]       = { TUNER_GO, 0x01};
777 
778 	mt352_write(fe, clock_config,   sizeof(clock_config));
779 	udelay(200);
780 	mt352_write(fe, reset,          sizeof(reset));
781 	mt352_write(fe, adc_ctl_1_cfg,  sizeof(adc_ctl_1_cfg));
782 	mt352_write(fe, agc_cfg,        sizeof(agc_cfg));
783 	mt352_write(fe, input_freq_cfg, sizeof(input_freq_cfg));
784 	mt352_write(fe, rs_err_cfg,     sizeof(rs_err_cfg));
785 	mt352_write(fe, capt_range_cfg, sizeof(capt_range_cfg));
786 	mt352_write(fe, trl_nom_cfg,    sizeof(trl_nom_cfg));
787 	mt352_write(fe, tps_given_cfg,  sizeof(tps_given_cfg));
788 	mt352_write(fe, tuner_go,       sizeof(tuner_go));
789 	return 0;
790 }
791 
792 static struct mt352_config terratec_xs_mt352_cfg = {
793 	.demod_address = (0x1e >> 1),
794 	.no_tuner = 1,
795 	.if2 = 45600,
796 	.demod_init = em28xx_mt352_terratec_xs_init,
797 };
798 
799 static struct tda10023_config em28xx_tda10023_config = {
800 	.demod_address = 0x0c,
801 	.invert = 1,
802 };
803 
804 static struct cxd2820r_config em28xx_cxd2820r_config = {
805 	.i2c_address = (0xd8 >> 1),
806 	.ts_mode = CXD2820R_TS_SERIAL,
807 };
808 
809 static struct tda18271_config em28xx_cxd2820r_tda18271_config = {
810 	.output_opt = TDA18271_OUTPUT_LT_OFF,
811 	.gate = TDA18271_GATE_DIGITAL,
812 };
813 
814 static const struct tda10071_config em28xx_tda10071_config = {
815 	.demod_i2c_addr = 0x55, /* (0xaa >> 1) */
816 	.tuner_i2c_addr = 0x14,
817 	.i2c_wr_max = 64,
818 	.ts_mode = TDA10071_TS_SERIAL,
819 	.spec_inv = 0,
820 	.xtal = 40444000, /* 40.444 MHz */
821 	.pll_multiplier = 20,
822 };
823 
824 static const struct a8293_config em28xx_a8293_config = {
825 	.i2c_addr = 0x08, /* (0x10 >> 1) */
826 };
827 
828 static struct zl10353_config em28xx_zl10353_no_i2c_gate_dev = {
829 	.demod_address = (0x1e >> 1),
830 	.disable_i2c_gate_ctrl = 1,
831 	.no_tuner = 1,
832 	.parallel_ts = 1,
833 };
834 static struct qt1010_config em28xx_qt1010_config = {
835 	.i2c_address = 0x62
836 };
837 
838 static const struct mb86a20s_config c3tech_duo_mb86a20s_config = {
839 	.demod_address = 0x10,
840 	.is_serial = true,
841 };
842 
843 static struct tda18271_std_map mb86a20s_tda18271_config = {
844 	.dvbt_6   = { .if_freq = 4000, .agc_mode = 3, .std = 4,
845 		      .if_lvl = 1, .rfagc_top = 0x37, },
846 };
847 
848 static struct tda18271_config c3tech_duo_tda18271_config = {
849 	.std_map = &mb86a20s_tda18271_config,
850 	.gate    = TDA18271_GATE_DIGITAL,
851 	.small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
852 };
853 
854 static const struct m88ds3103_config pctv_461e_m88ds3103_config = {
855 	.i2c_addr = 0x68,
856 	.clock = 27000000,
857 	.i2c_wr_max = 33,
858 	.clock_out = 0,
859 	.ts_mode = M88DS3103_TS_PARALLEL_16,
860 	.agc = 0x99,
861 };
862 
863 
864 static struct tda18271_std_map drx_j_std_map = {
865 	.atsc_6   = { .if_freq = 5000, .agc_mode = 3, .std = 0, .if_lvl = 1,
866 		      .rfagc_top = 0x37, },
867 	.qam_6    = { .if_freq = 5380, .agc_mode = 3, .std = 3, .if_lvl = 1,
868 		      .rfagc_top = 0x37, },
869 };
870 
871 static struct tda18271_config pinnacle_80e_dvb_config = {
872 	.std_map = &drx_j_std_map,
873 	.gate    = TDA18271_GATE_DIGITAL,
874 	.role    = TDA18271_MASTER,
875 };
876 
877 /* ------------------------------------------------------------------ */
878 
879 static int em28xx_attach_xc3028(u8 addr, struct em28xx *dev)
880 {
881 	struct dvb_frontend *fe;
882 	struct xc2028_config cfg;
883 	struct xc2028_ctrl ctl;
884 
885 	memset(&cfg, 0, sizeof(cfg));
886 	cfg.i2c_adap  = &dev->i2c_adap[dev->def_i2c_bus];
887 	cfg.i2c_addr  = addr;
888 
889 	memset(&ctl, 0, sizeof(ctl));
890 	em28xx_setup_xc3028(dev, &ctl);
891 	cfg.ctrl  = &ctl;
892 
893 	if (!dev->dvb->fe[0]) {
894 		em28xx_errdev("/2: dvb frontend not attached. "
895 				"Can't attach xc3028\n");
896 		return -EINVAL;
897 	}
898 
899 	fe = dvb_attach(xc2028_attach, dev->dvb->fe[0], &cfg);
900 	if (!fe) {
901 		em28xx_errdev("/2: xc3028 attach failed\n");
902 		dvb_frontend_detach(dev->dvb->fe[0]);
903 		dev->dvb->fe[0] = NULL;
904 		return -EINVAL;
905 	}
906 
907 	em28xx_info("%s/2: xc3028 attached\n", dev->name);
908 
909 	return 0;
910 }
911 
912 /* ------------------------------------------------------------------ */
913 
914 static int em28xx_register_dvb(struct em28xx_dvb *dvb, struct module *module,
915 			       struct em28xx *dev, struct device *device)
916 {
917 	int result;
918 
919 	mutex_init(&dvb->lock);
920 
921 	/* register adapter */
922 	result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
923 				      adapter_nr);
924 	if (result < 0) {
925 		printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
926 		       dev->name, result);
927 		goto fail_adapter;
928 	}
929 
930 	/* Ensure all frontends negotiate bus access */
931 	dvb->fe[0]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
932 	if (dvb->fe[1])
933 		dvb->fe[1]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
934 
935 	dvb->adapter.priv = &dev->i2c_bus[dev->def_i2c_bus];
936 
937 	/* register frontend */
938 	result = dvb_register_frontend(&dvb->adapter, dvb->fe[0]);
939 	if (result < 0) {
940 		printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
941 		       dev->name, result);
942 		goto fail_frontend0;
943 	}
944 
945 	/* register 2nd frontend */
946 	if (dvb->fe[1]) {
947 		result = dvb_register_frontend(&dvb->adapter, dvb->fe[1]);
948 		if (result < 0) {
949 			printk(KERN_WARNING "%s: 2nd dvb_register_frontend failed (errno = %d)\n",
950 				dev->name, result);
951 			goto fail_frontend1;
952 		}
953 	}
954 
955 	/* register demux stuff */
956 	dvb->demux.dmx.capabilities =
957 		DMX_TS_FILTERING | DMX_SECTION_FILTERING |
958 		DMX_MEMORY_BASED_FILTERING;
959 	dvb->demux.priv       = dvb;
960 	dvb->demux.filternum  = 256;
961 	dvb->demux.feednum    = 256;
962 	dvb->demux.start_feed = em28xx_start_feed;
963 	dvb->demux.stop_feed  = em28xx_stop_feed;
964 
965 	result = dvb_dmx_init(&dvb->demux);
966 	if (result < 0) {
967 		printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
968 		       dev->name, result);
969 		goto fail_dmx;
970 	}
971 
972 	dvb->dmxdev.filternum    = 256;
973 	dvb->dmxdev.demux        = &dvb->demux.dmx;
974 	dvb->dmxdev.capabilities = 0;
975 	result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
976 	if (result < 0) {
977 		printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
978 		       dev->name, result);
979 		goto fail_dmxdev;
980 	}
981 
982 	dvb->fe_hw.source = DMX_FRONTEND_0;
983 	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
984 	if (result < 0) {
985 		printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
986 		       dev->name, result);
987 		goto fail_fe_hw;
988 	}
989 
990 	dvb->fe_mem.source = DMX_MEMORY_FE;
991 	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
992 	if (result < 0) {
993 		printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
994 		       dev->name, result);
995 		goto fail_fe_mem;
996 	}
997 
998 	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
999 	if (result < 0) {
1000 		printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
1001 		       dev->name, result);
1002 		goto fail_fe_conn;
1003 	}
1004 
1005 	/* register network adapter */
1006 	dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
1007 	return 0;
1008 
1009 fail_fe_conn:
1010 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
1011 fail_fe_mem:
1012 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
1013 fail_fe_hw:
1014 	dvb_dmxdev_release(&dvb->dmxdev);
1015 fail_dmxdev:
1016 	dvb_dmx_release(&dvb->demux);
1017 fail_dmx:
1018 	if (dvb->fe[1])
1019 		dvb_unregister_frontend(dvb->fe[1]);
1020 	dvb_unregister_frontend(dvb->fe[0]);
1021 fail_frontend1:
1022 	if (dvb->fe[1])
1023 		dvb_frontend_detach(dvb->fe[1]);
1024 fail_frontend0:
1025 	dvb_frontend_detach(dvb->fe[0]);
1026 	dvb_unregister_adapter(&dvb->adapter);
1027 fail_adapter:
1028 	return result;
1029 }
1030 
1031 static void em28xx_unregister_dvb(struct em28xx_dvb *dvb)
1032 {
1033 	dvb_net_release(&dvb->net);
1034 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
1035 	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
1036 	dvb_dmxdev_release(&dvb->dmxdev);
1037 	dvb_dmx_release(&dvb->demux);
1038 	if (dvb->fe[1])
1039 		dvb_unregister_frontend(dvb->fe[1]);
1040 	dvb_unregister_frontend(dvb->fe[0]);
1041 	if (dvb->fe[1] && !dvb->dont_attach_fe1)
1042 		dvb_frontend_detach(dvb->fe[1]);
1043 	dvb_frontend_detach(dvb->fe[0]);
1044 	dvb_unregister_adapter(&dvb->adapter);
1045 }
1046 
1047 static int em28xx_dvb_init(struct em28xx *dev)
1048 {
1049 	int result = 0, mfe_shared = 0;
1050 	struct em28xx_dvb *dvb;
1051 
1052 	if (dev->is_audio_only) {
1053 		/* Shouldn't initialize IR for this interface */
1054 		return 0;
1055 	}
1056 
1057 	if (!dev->board.has_dvb) {
1058 		/* This device does not support the extension */
1059 		return 0;
1060 	}
1061 
1062 	em28xx_info("Binding DVB extension\n");
1063 
1064 	dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
1065 	if (dvb == NULL) {
1066 		em28xx_info("em28xx_dvb: memory allocation failed\n");
1067 		return -ENOMEM;
1068 	}
1069 	dev->dvb = dvb;
1070 	dvb->fe[0] = dvb->fe[1] = NULL;
1071 
1072 	/* pre-allocate DVB usb transfer buffers */
1073 	if (dev->dvb_xfer_bulk) {
1074 		result = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE,
1075 					   dev->dvb_xfer_bulk,
1076 					   EM28XX_DVB_NUM_BUFS,
1077 					   512,
1078 					   EM28XX_DVB_BULK_PACKET_MULTIPLIER);
1079 	} else {
1080 		result = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE,
1081 					   dev->dvb_xfer_bulk,
1082 					   EM28XX_DVB_NUM_BUFS,
1083 					   dev->dvb_max_pkt_size_isoc,
1084 					   EM28XX_DVB_NUM_ISOC_PACKETS);
1085 	}
1086 	if (result) {
1087 		em28xx_errdev("em28xx_dvb: failed to pre-allocate USB transfer buffers for DVB.\n");
1088 		kfree(dvb);
1089 		dev->dvb = NULL;
1090 		return result;
1091 	}
1092 
1093 	mutex_lock(&dev->lock);
1094 	em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
1095 	/* init frontend */
1096 	switch (dev->model) {
1097 	case EM2874_BOARD_LEADERSHIP_ISDBT:
1098 		dvb->fe[0] = dvb_attach(s921_attach,
1099 				&sharp_isdbt, &dev->i2c_adap[dev->def_i2c_bus]);
1100 
1101 		if (!dvb->fe[0]) {
1102 			result = -EINVAL;
1103 			goto out_free;
1104 		}
1105 
1106 		break;
1107 	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
1108 	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
1109 	case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
1110 	case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
1111 		dvb->fe[0] = dvb_attach(lgdt330x_attach,
1112 					   &em2880_lgdt3303_dev,
1113 					   &dev->i2c_adap[dev->def_i2c_bus]);
1114 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1115 			result = -EINVAL;
1116 			goto out_free;
1117 		}
1118 		break;
1119 	case EM2880_BOARD_KWORLD_DVB_310U:
1120 		dvb->fe[0] = dvb_attach(zl10353_attach,
1121 					   &em28xx_zl10353_with_xc3028,
1122 					   &dev->i2c_adap[dev->def_i2c_bus]);
1123 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1124 			result = -EINVAL;
1125 			goto out_free;
1126 		}
1127 		break;
1128 	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
1129 	case EM2882_BOARD_TERRATEC_HYBRID_XS:
1130 	case EM2880_BOARD_EMPIRE_DUAL_TV:
1131 		dvb->fe[0] = dvb_attach(zl10353_attach,
1132 					   &em28xx_zl10353_xc3028_no_i2c_gate,
1133 					   &dev->i2c_adap[dev->def_i2c_bus]);
1134 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1135 			result = -EINVAL;
1136 			goto out_free;
1137 		}
1138 		break;
1139 	case EM2880_BOARD_TERRATEC_HYBRID_XS:
1140 	case EM2880_BOARD_TERRATEC_HYBRID_XS_FR:
1141 	case EM2881_BOARD_PINNACLE_HYBRID_PRO:
1142 	case EM2882_BOARD_DIKOM_DK300:
1143 	case EM2882_BOARD_KWORLD_VS_DVBT:
1144 		dvb->fe[0] = dvb_attach(zl10353_attach,
1145 					   &em28xx_zl10353_xc3028_no_i2c_gate,
1146 					   &dev->i2c_adap[dev->def_i2c_bus]);
1147 		if (dvb->fe[0] == NULL) {
1148 			/* This board could have either a zl10353 or a mt352.
1149 			   If the chip id isn't for zl10353, try mt352 */
1150 			dvb->fe[0] = dvb_attach(mt352_attach,
1151 						   &terratec_xs_mt352_cfg,
1152 						   &dev->i2c_adap[dev->def_i2c_bus]);
1153 		}
1154 
1155 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1156 			result = -EINVAL;
1157 			goto out_free;
1158 		}
1159 		break;
1160 	case EM2870_BOARD_KWORLD_355U:
1161 		dvb->fe[0] = dvb_attach(zl10353_attach,
1162 					   &em28xx_zl10353_no_i2c_gate_dev,
1163 					   &dev->i2c_adap[dev->def_i2c_bus]);
1164 		if (dvb->fe[0] != NULL)
1165 			dvb_attach(qt1010_attach, dvb->fe[0],
1166 				   &dev->i2c_adap[dev->def_i2c_bus], &em28xx_qt1010_config);
1167 		break;
1168 	case EM2883_BOARD_KWORLD_HYBRID_330U:
1169 	case EM2882_BOARD_EVGA_INDTUBE:
1170 		dvb->fe[0] = dvb_attach(s5h1409_attach,
1171 					   &em28xx_s5h1409_with_xc3028,
1172 					   &dev->i2c_adap[dev->def_i2c_bus]);
1173 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1174 			result = -EINVAL;
1175 			goto out_free;
1176 		}
1177 		break;
1178 	case EM2882_BOARD_KWORLD_ATSC_315U:
1179 		dvb->fe[0] = dvb_attach(lgdt330x_attach,
1180 					   &em2880_lgdt3303_dev,
1181 					   &dev->i2c_adap[dev->def_i2c_bus]);
1182 		if (dvb->fe[0] != NULL) {
1183 			if (!dvb_attach(simple_tuner_attach, dvb->fe[0],
1184 				&dev->i2c_adap[dev->def_i2c_bus], 0x61, TUNER_THOMSON_DTT761X)) {
1185 				result = -EINVAL;
1186 				goto out_free;
1187 			}
1188 		}
1189 		break;
1190 	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
1191 	case EM2882_BOARD_PINNACLE_HYBRID_PRO_330E:
1192 		dvb->fe[0] = dvb_attach(drxd_attach, &em28xx_drxd, NULL,
1193 					   &dev->i2c_adap[dev->def_i2c_bus], &dev->udev->dev);
1194 		if (em28xx_attach_xc3028(0x61, dev) < 0) {
1195 			result = -EINVAL;
1196 			goto out_free;
1197 		}
1198 		break;
1199 	case EM2870_BOARD_REDDO_DVB_C_USB_BOX:
1200 		/* Philips CU1216L NIM (Philips TDA10023 + Infineon TUA6034) */
1201 		dvb->fe[0] = dvb_attach(tda10023_attach,
1202 			&em28xx_tda10023_config,
1203 			&dev->i2c_adap[dev->def_i2c_bus], 0x48);
1204 		if (dvb->fe[0]) {
1205 			if (!dvb_attach(simple_tuner_attach, dvb->fe[0],
1206 				&dev->i2c_adap[dev->def_i2c_bus], 0x60, TUNER_PHILIPS_CU1216L)) {
1207 				result = -EINVAL;
1208 				goto out_free;
1209 			}
1210 		}
1211 		break;
1212 	case EM2870_BOARD_KWORLD_A340:
1213 		dvb->fe[0] = dvb_attach(lgdt3305_attach,
1214 					   &em2870_lgdt3304_dev,
1215 					   &dev->i2c_adap[dev->def_i2c_bus]);
1216 		if (!dvb->fe[0]) {
1217 			result = -EINVAL;
1218 			goto out_free;
1219 		}
1220 		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1221 			&dev->i2c_adap[dev->def_i2c_bus],
1222 			&kworld_a340_config)) {
1223 				dvb_frontend_detach(dvb->fe[0]);
1224 				result = -EINVAL;
1225 				goto out_free;
1226 		}
1227 		break;
1228 	case EM28174_BOARD_PCTV_290E:
1229 		/* set default GPIO0 for LNA, used if GPIOLIB is undefined */
1230 		dvb->lna_gpio = CXD2820R_GPIO_E | CXD2820R_GPIO_O |
1231 				CXD2820R_GPIO_L;
1232 		dvb->fe[0] = dvb_attach(cxd2820r_attach,
1233 					&em28xx_cxd2820r_config,
1234 					&dev->i2c_adap[dev->def_i2c_bus],
1235 					&dvb->lna_gpio);
1236 		if (dvb->fe[0]) {
1237 			/* FE 0 attach tuner */
1238 			if (!dvb_attach(tda18271_attach,
1239 					dvb->fe[0],
1240 					0x60,
1241 					&dev->i2c_adap[dev->def_i2c_bus],
1242 					&em28xx_cxd2820r_tda18271_config)) {
1243 
1244 				dvb_frontend_detach(dvb->fe[0]);
1245 				result = -EINVAL;
1246 				goto out_free;
1247 			}
1248 
1249 #ifdef CONFIG_GPIOLIB
1250 			/* enable LNA for DVB-T, DVB-T2 and DVB-C */
1251 			result = gpio_request_one(dvb->lna_gpio,
1252 					GPIOF_OUT_INIT_LOW, NULL);
1253 			if (result)
1254 				em28xx_errdev("gpio request failed %d\n",
1255 						result);
1256 			else
1257 				gpio_free(dvb->lna_gpio);
1258 
1259 			result = 0; /* continue even set LNA fails */
1260 #endif
1261 			dvb->fe[0]->ops.set_lna = em28xx_pctv_290e_set_lna;
1262 		}
1263 
1264 		break;
1265 	case EM2884_BOARD_HAUPPAUGE_WINTV_HVR_930C:
1266 	{
1267 		struct xc5000_config cfg;
1268 		hauppauge_hvr930c_init(dev);
1269 
1270 		dvb->fe[0] = dvb_attach(drxk_attach,
1271 					&hauppauge_930c_drxk, &dev->i2c_adap[dev->def_i2c_bus]);
1272 		if (!dvb->fe[0]) {
1273 			result = -EINVAL;
1274 			goto out_free;
1275 		}
1276 		/* FIXME: do we need a pll semaphore? */
1277 		dvb->fe[0]->sec_priv = dvb;
1278 		sema_init(&dvb->pll_mutex, 1);
1279 		dvb->gate_ctrl = dvb->fe[0]->ops.i2c_gate_ctrl;
1280 		dvb->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
1281 
1282 		/* Attach xc5000 */
1283 		memset(&cfg, 0, sizeof(cfg));
1284 		cfg.i2c_address  = 0x61;
1285 		cfg.if_khz = 4000;
1286 
1287 		if (dvb->fe[0]->ops.i2c_gate_ctrl)
1288 			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 1);
1289 		if (!dvb_attach(xc5000_attach, dvb->fe[0], &dev->i2c_adap[dev->def_i2c_bus],
1290 				&cfg)) {
1291 			result = -EINVAL;
1292 			goto out_free;
1293 		}
1294 		if (dvb->fe[0]->ops.i2c_gate_ctrl)
1295 			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 0);
1296 
1297 		break;
1298 	}
1299 	case EM2884_BOARD_TERRATEC_H5:
1300 		terratec_h5_init(dev);
1301 
1302 		dvb->fe[0] = dvb_attach(drxk_attach, &terratec_h5_drxk, &dev->i2c_adap[dev->def_i2c_bus]);
1303 		if (!dvb->fe[0]) {
1304 			result = -EINVAL;
1305 			goto out_free;
1306 		}
1307 		/* FIXME: do we need a pll semaphore? */
1308 		dvb->fe[0]->sec_priv = dvb;
1309 		sema_init(&dvb->pll_mutex, 1);
1310 		dvb->gate_ctrl = dvb->fe[0]->ops.i2c_gate_ctrl;
1311 		dvb->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
1312 
1313 		/* Attach tda18271 to DVB-C frontend */
1314 		if (dvb->fe[0]->ops.i2c_gate_ctrl)
1315 			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 1);
1316 		if (!dvb_attach(tda18271c2dd_attach, dvb->fe[0], &dev->i2c_adap[dev->def_i2c_bus], 0x60)) {
1317 			result = -EINVAL;
1318 			goto out_free;
1319 		}
1320 		if (dvb->fe[0]->ops.i2c_gate_ctrl)
1321 			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 0);
1322 
1323 		break;
1324 	case EM2884_BOARD_C3TECH_DIGITAL_DUO:
1325 		dvb->fe[0] = dvb_attach(mb86a20s_attach,
1326 					   &c3tech_duo_mb86a20s_config,
1327 					   &dev->i2c_adap[dev->def_i2c_bus]);
1328 		if (dvb->fe[0] != NULL)
1329 			dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1330 				   &dev->i2c_adap[dev->def_i2c_bus],
1331 				   &c3tech_duo_tda18271_config);
1332 		break;
1333 	case EM28174_BOARD_PCTV_460E:
1334 		/* attach demod */
1335 		dvb->fe[0] = dvb_attach(tda10071_attach,
1336 			&em28xx_tda10071_config, &dev->i2c_adap[dev->def_i2c_bus]);
1337 
1338 		/* attach SEC */
1339 		if (dvb->fe[0])
1340 			dvb_attach(a8293_attach, dvb->fe[0], &dev->i2c_adap[dev->def_i2c_bus],
1341 				&em28xx_a8293_config);
1342 		break;
1343 	case EM2874_BOARD_DELOCK_61959:
1344 	case EM2874_BOARD_MAXMEDIA_UB425_TC:
1345 		/* attach demodulator */
1346 		dvb->fe[0] = dvb_attach(drxk_attach, &maxmedia_ub425_tc_drxk,
1347 				&dev->i2c_adap[dev->def_i2c_bus]);
1348 
1349 		if (dvb->fe[0]) {
1350 			/* disable I2C-gate */
1351 			dvb->fe[0]->ops.i2c_gate_ctrl = NULL;
1352 
1353 			/* attach tuner */
1354 			if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1355 					&dev->i2c_adap[dev->def_i2c_bus],
1356 					&em28xx_cxd2820r_tda18271_config)) {
1357 				dvb_frontend_detach(dvb->fe[0]);
1358 				result = -EINVAL;
1359 				goto out_free;
1360 			}
1361 		}
1362 		break;
1363 	case EM2884_BOARD_PCTV_510E:
1364 	case EM2884_BOARD_PCTV_520E:
1365 		pctv_520e_init(dev);
1366 
1367 		/* attach demodulator */
1368 		dvb->fe[0] = dvb_attach(drxk_attach, &pctv_520e_drxk,
1369 				&dev->i2c_adap[dev->def_i2c_bus]);
1370 
1371 		if (dvb->fe[0]) {
1372 			/* attach tuner */
1373 			if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1374 					&dev->i2c_adap[dev->def_i2c_bus],
1375 					&em28xx_cxd2820r_tda18271_config)) {
1376 				dvb_frontend_detach(dvb->fe[0]);
1377 				result = -EINVAL;
1378 				goto out_free;
1379 			}
1380 		}
1381 		break;
1382 	case EM2884_BOARD_CINERGY_HTC_STICK:
1383 		terratec_htc_stick_init(dev);
1384 
1385 		/* attach demodulator */
1386 		dvb->fe[0] = dvb_attach(drxk_attach, &terratec_htc_stick_drxk,
1387 					&dev->i2c_adap[dev->def_i2c_bus]);
1388 		if (!dvb->fe[0]) {
1389 			result = -EINVAL;
1390 			goto out_free;
1391 		}
1392 
1393 		/* Attach the demodulator. */
1394 		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1395 				&dev->i2c_adap[dev->def_i2c_bus],
1396 				&em28xx_cxd2820r_tda18271_config)) {
1397 			result = -EINVAL;
1398 			goto out_free;
1399 		}
1400 		break;
1401 	case EM2884_BOARD_TERRATEC_HTC_USB_XS:
1402 		terratec_htc_usb_xs_init(dev);
1403 
1404 		/* attach demodulator */
1405 		dvb->fe[0] = dvb_attach(drxk_attach, &terratec_htc_stick_drxk,
1406 					&dev->i2c_adap[dev->def_i2c_bus]);
1407 		if (!dvb->fe[0]) {
1408 			result = -EINVAL;
1409 			goto out_free;
1410 		}
1411 
1412 		/* Attach the demodulator. */
1413 		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1414 				&dev->i2c_adap[dev->def_i2c_bus],
1415 				&em28xx_cxd2820r_tda18271_config)) {
1416 			result = -EINVAL;
1417 			goto out_free;
1418 		}
1419 		break;
1420 	case EM2874_BOARD_KWORLD_UB435Q_V2:
1421 		dvb->fe[0] = dvb_attach(lgdt3305_attach,
1422 					&em2874_lgdt3305_dev,
1423 					&dev->i2c_adap[dev->def_i2c_bus]);
1424 		if (!dvb->fe[0]) {
1425 			result = -EINVAL;
1426 			goto out_free;
1427 		}
1428 
1429 		/* Attach the demodulator. */
1430 		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1431 				&dev->i2c_adap[dev->def_i2c_bus],
1432 				&kworld_ub435q_v2_config)) {
1433 			result = -EINVAL;
1434 			goto out_free;
1435 		}
1436 		break;
1437 	case EM2874_BOARD_KWORLD_UB435Q_V3:
1438 		dvb->fe[0] = dvb_attach(lgdt3305_attach,
1439 					&em2874_lgdt3305_nogate_dev,
1440 					&dev->i2c_adap[dev->def_i2c_bus]);
1441 		if (!dvb->fe[0]) {
1442 			result = -EINVAL;
1443 			goto out_free;
1444 		}
1445 
1446 		/* Attach the demodulator. */
1447 		if (!dvb_attach(tda18212_attach, dvb->fe[0],
1448 				&dev->i2c_adap[dev->def_i2c_bus],
1449 				&kworld_ub435q_v3_config)) {
1450 			result = -EINVAL;
1451 			goto out_free;
1452 		}
1453 		break;
1454 	case EM2874_BOARD_PCTV_HD_MINI_80E:
1455 		dvb->fe[0] = dvb_attach(drx39xxj_attach, &dev->i2c_adap[dev->def_i2c_bus]);
1456 		if (dvb->fe[0] != NULL) {
1457 			dvb->fe[0] = dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1458 						&dev->i2c_adap[dev->def_i2c_bus],
1459 						&pinnacle_80e_dvb_config);
1460 			if (!dvb->fe[0]) {
1461 				result = -EINVAL;
1462 				goto out_free;
1463 			}
1464 		}
1465 		break;
1466 	case EM28178_BOARD_PCTV_461E:
1467 		{
1468 			/* demod I2C adapter */
1469 			struct i2c_adapter *i2c_adapter;
1470 			struct i2c_client *client;
1471 			struct i2c_board_info info;
1472 			struct m88ts2022_config m88ts2022_config = {
1473 				.clock = 27000000,
1474 			};
1475 			memset(&info, 0, sizeof(struct i2c_board_info));
1476 
1477 			/* attach demod */
1478 			dvb->fe[0] = dvb_attach(m88ds3103_attach,
1479 					&pctv_461e_m88ds3103_config,
1480 					&dev->i2c_adap[dev->def_i2c_bus],
1481 					&i2c_adapter);
1482 			if (dvb->fe[0] == NULL) {
1483 				result = -ENODEV;
1484 				goto out_free;
1485 			}
1486 
1487 			/* attach tuner */
1488 			m88ts2022_config.fe = dvb->fe[0];
1489 			strlcpy(info.type, "m88ts2022", I2C_NAME_SIZE);
1490 			info.addr = 0x60;
1491 			info.platform_data = &m88ts2022_config;
1492 			request_module("m88ts2022");
1493 			client = i2c_new_device(i2c_adapter, &info);
1494 			if (client == NULL || client->dev.driver == NULL) {
1495 				dvb_frontend_detach(dvb->fe[0]);
1496 				result = -ENODEV;
1497 				goto out_free;
1498 			}
1499 
1500 			if (!try_module_get(client->dev.driver->owner)) {
1501 				i2c_unregister_device(client);
1502 				dvb_frontend_detach(dvb->fe[0]);
1503 				result = -ENODEV;
1504 				goto out_free;
1505 			}
1506 
1507 			/* delegate signal strength measurement to tuner */
1508 			dvb->fe[0]->ops.read_signal_strength =
1509 					dvb->fe[0]->ops.tuner_ops.get_rf_strength;
1510 
1511 			/* attach SEC */
1512 			if (!dvb_attach(a8293_attach, dvb->fe[0],
1513 					&dev->i2c_adap[dev->def_i2c_bus],
1514 					&em28xx_a8293_config)) {
1515 				module_put(client->dev.driver->owner);
1516 				i2c_unregister_device(client);
1517 				dvb_frontend_detach(dvb->fe[0]);
1518 				result = -ENODEV;
1519 				goto out_free;
1520 			}
1521 
1522 			dvb->i2c_client_tuner = client;
1523 		}
1524 		break;
1525 	case EM28178_BOARD_PCTV_292E:
1526 		{
1527 			struct i2c_adapter *adapter;
1528 			struct i2c_client *client;
1529 			struct i2c_board_info info;
1530 			struct si2168_config si2168_config;
1531 			struct si2157_config si2157_config;
1532 
1533 			/* attach demod */
1534 			si2168_config.i2c_adapter = &adapter;
1535 			si2168_config.fe = &dvb->fe[0];
1536 			memset(&info, 0, sizeof(struct i2c_board_info));
1537 			strlcpy(info.type, "si2168", I2C_NAME_SIZE);
1538 			info.addr = 0x64;
1539 			info.platform_data = &si2168_config;
1540 			request_module(info.type);
1541 			client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &info);
1542 			if (client == NULL || client->dev.driver == NULL) {
1543 				result = -ENODEV;
1544 				goto out_free;
1545 			}
1546 
1547 			if (!try_module_get(client->dev.driver->owner)) {
1548 				i2c_unregister_device(client);
1549 				result = -ENODEV;
1550 				goto out_free;
1551 			}
1552 
1553 			dvb->i2c_client_demod = client;
1554 
1555 			/* attach tuner */
1556 			memset(&si2157_config, 0, sizeof(si2157_config));
1557 			si2157_config.fe = dvb->fe[0];
1558 			memset(&info, 0, sizeof(struct i2c_board_info));
1559 			strlcpy(info.type, "si2157", I2C_NAME_SIZE);
1560 			info.addr = 0x60;
1561 			info.platform_data = &si2157_config;
1562 			request_module(info.type);
1563 			client = i2c_new_device(adapter, &info);
1564 			if (client == NULL || client->dev.driver == NULL) {
1565 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1566 				i2c_unregister_device(dvb->i2c_client_demod);
1567 				result = -ENODEV;
1568 				goto out_free;
1569 			}
1570 
1571 			if (!try_module_get(client->dev.driver->owner)) {
1572 				i2c_unregister_device(client);
1573 				module_put(dvb->i2c_client_demod->dev.driver->owner);
1574 				i2c_unregister_device(dvb->i2c_client_demod);
1575 				result = -ENODEV;
1576 				goto out_free;
1577 			}
1578 
1579 			dvb->i2c_client_tuner = client;
1580 			dvb->fe[0]->ops.set_lna = em28xx_pctv_292e_set_lna;
1581 		}
1582 		break;
1583 	default:
1584 		em28xx_errdev("/2: The frontend of your DVB/ATSC card"
1585 				" isn't supported yet\n");
1586 		break;
1587 	}
1588 	if (NULL == dvb->fe[0]) {
1589 		em28xx_errdev("/2: frontend initialization failed\n");
1590 		result = -EINVAL;
1591 		goto out_free;
1592 	}
1593 	/* define general-purpose callback pointer */
1594 	dvb->fe[0]->callback = em28xx_tuner_callback;
1595 	if (dvb->fe[1])
1596 		dvb->fe[1]->callback = em28xx_tuner_callback;
1597 
1598 	/* register everything */
1599 	result = em28xx_register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
1600 
1601 	if (result < 0)
1602 		goto out_free;
1603 
1604 	/* MFE lock */
1605 	dvb->adapter.mfe_shared = mfe_shared;
1606 
1607 	em28xx_info("DVB extension successfully initialized\n");
1608 
1609 	kref_get(&dev->ref);
1610 
1611 ret:
1612 	em28xx_set_mode(dev, EM28XX_SUSPEND);
1613 	mutex_unlock(&dev->lock);
1614 	return result;
1615 
1616 out_free:
1617 	kfree(dvb);
1618 	dev->dvb = NULL;
1619 	goto ret;
1620 }
1621 
1622 static inline void prevent_sleep(struct dvb_frontend_ops *ops)
1623 {
1624 	ops->set_voltage = NULL;
1625 	ops->sleep = NULL;
1626 	ops->tuner_ops.sleep = NULL;
1627 }
1628 
1629 static int em28xx_dvb_fini(struct em28xx *dev)
1630 {
1631 	struct em28xx_dvb *dvb;
1632 	struct i2c_client *client;
1633 
1634 	if (dev->is_audio_only) {
1635 		/* Shouldn't initialize IR for this interface */
1636 		return 0;
1637 	}
1638 
1639 	if (!dev->board.has_dvb) {
1640 		/* This device does not support the extension */
1641 		return 0;
1642 	}
1643 
1644 	if (!dev->dvb)
1645 		return 0;
1646 
1647 	em28xx_info("Closing DVB extension");
1648 
1649 	dvb = dev->dvb;
1650 	client = dvb->i2c_client_tuner;
1651 
1652 	em28xx_uninit_usb_xfer(dev, EM28XX_DIGITAL_MODE);
1653 
1654 	if (dev->disconnected) {
1655 		/* We cannot tell the device to sleep
1656 		 * once it has been unplugged. */
1657 		if (dvb->fe[0]) {
1658 			prevent_sleep(&dvb->fe[0]->ops);
1659 			dvb->fe[0]->exit = DVB_FE_DEVICE_REMOVED;
1660 		}
1661 		if (dvb->fe[1]) {
1662 			prevent_sleep(&dvb->fe[1]->ops);
1663 			dvb->fe[1]->exit = DVB_FE_DEVICE_REMOVED;
1664 		}
1665 	}
1666 
1667 	/* remove I2C tuner */
1668 	if (client) {
1669 		module_put(client->dev.driver->owner);
1670 		i2c_unregister_device(client);
1671 	}
1672 
1673 	/* remove I2C demod */
1674 	client = dvb->i2c_client_demod;
1675 	if (client) {
1676 		module_put(client->dev.driver->owner);
1677 		i2c_unregister_device(client);
1678 	}
1679 
1680 	em28xx_unregister_dvb(dvb);
1681 	kfree(dvb);
1682 	dev->dvb = NULL;
1683 	kref_put(&dev->ref, em28xx_free_device);
1684 
1685 	return 0;
1686 }
1687 
1688 static int em28xx_dvb_suspend(struct em28xx *dev)
1689 {
1690 	int ret = 0;
1691 
1692 	if (dev->is_audio_only)
1693 		return 0;
1694 
1695 	if (!dev->board.has_dvb)
1696 		return 0;
1697 
1698 	em28xx_info("Suspending DVB extension");
1699 	if (dev->dvb) {
1700 		struct em28xx_dvb *dvb = dev->dvb;
1701 
1702 		if (dvb->fe[0]) {
1703 			ret = dvb_frontend_suspend(dvb->fe[0]);
1704 			em28xx_info("fe0 suspend %d", ret);
1705 		}
1706 		if (dvb->fe[1]) {
1707 			dvb_frontend_suspend(dvb->fe[1]);
1708 			em28xx_info("fe1 suspend %d", ret);
1709 		}
1710 	}
1711 
1712 	return 0;
1713 }
1714 
1715 static int em28xx_dvb_resume(struct em28xx *dev)
1716 {
1717 	int ret = 0;
1718 
1719 	if (dev->is_audio_only)
1720 		return 0;
1721 
1722 	if (!dev->board.has_dvb)
1723 		return 0;
1724 
1725 	em28xx_info("Resuming DVB extension");
1726 	if (dev->dvb) {
1727 		struct em28xx_dvb *dvb = dev->dvb;
1728 
1729 		if (dvb->fe[0]) {
1730 			ret = dvb_frontend_resume(dvb->fe[0]);
1731 			em28xx_info("fe0 resume %d", ret);
1732 		}
1733 
1734 		if (dvb->fe[1]) {
1735 			ret = dvb_frontend_resume(dvb->fe[1]);
1736 			em28xx_info("fe1 resume %d", ret);
1737 		}
1738 	}
1739 
1740 	return 0;
1741 }
1742 
1743 static struct em28xx_ops dvb_ops = {
1744 	.id   = EM28XX_DVB,
1745 	.name = "Em28xx dvb Extension",
1746 	.init = em28xx_dvb_init,
1747 	.fini = em28xx_dvb_fini,
1748 	.suspend = em28xx_dvb_suspend,
1749 	.resume = em28xx_dvb_resume,
1750 };
1751 
1752 static int __init em28xx_dvb_register(void)
1753 {
1754 	return em28xx_register_extension(&dvb_ops);
1755 }
1756 
1757 static void __exit em28xx_dvb_unregister(void)
1758 {
1759 	em28xx_unregister_extension(&dvb_ops);
1760 }
1761 
1762 module_init(em28xx_dvb_register);
1763 module_exit(em28xx_dvb_unregister);
1764