Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2067 insertions, 0 deletions

diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c b/drivers/media/usb/em28xx/em28xx-dvb.c
new file mode 100644
index 000000000..e1946237a
--- /dev/null
+++ b/drivers/media/usb/em28xx/em28xx-dvb.c
@@ -0,0 +1,2067 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// DVB device driver for em28xx
+//
+// (c) 2008-2011 Mauro Carvalho Chehab <mchehab@kernel.org>
+//
+// (c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
+//	- Fixes for the driver to properly work with HVR-950
+//	- Fixes for the driver to properly work with Pinnacle PCTV HD Pro Stick
+//	- Fixes for the driver to properly work with AMD ATI TV Wonder HD 600
+//
+// (c) 2008 Aidan Thornton <makosoft@googlemail.com>
+//
+// (c) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
+//
+// Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
+//	(c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
+//	(c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation version 2 of the License.
+
+#include "em28xx.h"
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include <media/v4l2-common.h>
+#include <media/dvb_demux.h>
+#include <media/dvb_net.h>
+#include <media/dmxdev.h>
+#include <media/tuner.h>
+#include "tuner-simple.h"
+#include <linux/gpio.h>
+
+#include "lgdt330x.h"
+#include "lgdt3305.h"
+#include "lgdt3306a.h"
+#include "zl10353.h"
+#include "s5h1409.h"
+#include "mt2060.h"
+#include "mt352.h"
+#include "mt352_priv.h" /* FIXME */
+#include "tda1002x.h"
+#include "drx39xyj/drx39xxj.h"
+#include "tda18271.h"
+#include "s921.h"
+#include "drxd.h"
+#include "cxd2820r.h"
+#include "tda18271c2dd.h"
+#include "drxk.h"
+#include "tda10071.h"
+#include "tda18212.h"
+#include "a8293.h"
+#include "qt1010.h"
+#include "mb86a20s.h"
+#include "m88ds3103.h"
+#include "ts2020.h"
+#include "si2168.h"
+#include "si2157.h"
+#include "tc90522.h"
+#include "qm1d1c0042.h"
+
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION(DRIVER_DESC " - digital TV interface");
+MODULE_VERSION(EM28XX_VERSION);
+
+static unsigned int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
+
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
+#define dprintk(level, fmt, arg...) do {				\
+	if (debug >= level)						\
+		dev_printk(KERN_DEBUG, &dev->intf->dev,			\
+			   "dvb: " fmt, ## arg);			\
+} while (0)
+
+struct em28xx_dvb {
+	struct dvb_frontend        *fe[2];
+
+	/* feed count management */
+	struct mutex               lock;
+	int                        nfeeds;
+
+	/* general boilerplate stuff */
+	struct dvb_adapter         adapter;
+	struct dvb_demux           demux;
+	struct dmxdev              dmxdev;
+	struct dmx_frontend        fe_hw;
+	struct dmx_frontend        fe_mem;
+	struct dvb_net             net;
+
+	/* Due to DRX-K - probably need changes */
+	int (*gate_ctrl)(struct dvb_frontend *fe, int gate);
+	struct semaphore      pll_mutex;
+	bool			dont_attach_fe1;
+	int			lna_gpio;
+	struct i2c_client	*i2c_client_demod;
+	struct i2c_client	*i2c_client_tuner;
+	struct i2c_client	*i2c_client_sec;
+};
+
+static inline void print_err_status(struct em28xx *dev,
+				    int packet, int status)
+{
+	char *errmsg = "Unknown";
+
+	switch (status) {
+	case -ENOENT:
+		errmsg = "unlinked synchronously";
+		break;
+	case -ECONNRESET:
+		errmsg = "unlinked asynchronously";
+		break;
+	case -ENOSR:
+		errmsg = "Buffer error (overrun)";
+		break;
+	case -EPIPE:
+		errmsg = "Stalled (device not responding)";
+		break;
+	case -EOVERFLOW:
+		errmsg = "Babble (bad cable?)";
+		break;
+	case -EPROTO:
+		errmsg = "Bit-stuff error (bad cable?)";
+		break;
+	case -EILSEQ:
+		errmsg = "CRC/Timeout (could be anything)";
+		break;
+	case -ETIME:
+		errmsg = "Device does not respond";
+		break;
+	}
+	if (packet < 0) {
+		dprintk(1, "URB status %d [%s].\n", status, errmsg);
+	} else {
+		dprintk(1, "URB packet %d, status %d [%s].\n",
+			packet, status, errmsg);
+	}
+}
+
+static inline int em28xx_dvb_urb_data_copy(struct em28xx *dev, struct urb *urb)
+{
+	int xfer_bulk, num_packets, i;
+
+	if (!dev)
+		return 0;
+
+	if (dev->disconnected)
+		return 0;
+
+	if (urb->status < 0)
+		print_err_status(dev, -1, urb->status);
+
+	xfer_bulk = usb_pipebulk(urb->pipe);
+
+	if (xfer_bulk) /* bulk */
+		num_packets = 1;
+	else /* isoc */
+		num_packets = urb->number_of_packets;
+
+	for (i = 0; i < num_packets; i++) {
+		if (xfer_bulk) {
+			if (urb->status < 0) {
+				print_err_status(dev, i, urb->status);
+				if (urb->status != -EPROTO)
+					continue;
+			}
+			if (!urb->actual_length)
+				continue;
+			dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
+					 urb->actual_length);
+		} else {
+			if (urb->iso_frame_desc[i].status < 0) {
+				print_err_status(dev, i,
+						 urb->iso_frame_desc[i].status);
+				if (urb->iso_frame_desc[i].status != -EPROTO)
+					continue;
+			}
+			if (!urb->iso_frame_desc[i].actual_length)
+				continue;
+			dvb_dmx_swfilter(&dev->dvb->demux,
+					 urb->transfer_buffer +
+					 urb->iso_frame_desc[i].offset,
+					 urb->iso_frame_desc[i].actual_length);
+		}
+	}
+
+	return 0;
+}
+
+static int em28xx_start_streaming(struct em28xx_dvb *dvb)
+{
+	int rc;
+	struct em28xx_i2c_bus *i2c_bus = dvb->adapter.priv;
+	struct em28xx *dev = i2c_bus->dev;
+	struct usb_device *udev = interface_to_usbdev(dev->intf);
+	int dvb_max_packet_size, packet_multiplier, dvb_alt;
+
+	if (dev->dvb_xfer_bulk) {
+		if (!dev->dvb_ep_bulk)
+			return -ENODEV;
+		dvb_max_packet_size = 512; /* USB 2.0 spec */
+		packet_multiplier = EM28XX_DVB_BULK_PACKET_MULTIPLIER;
+		dvb_alt = 0;
+	} else { /* isoc */
+		if (!dev->dvb_ep_isoc)
+			return -ENODEV;
+		dvb_max_packet_size = dev->dvb_max_pkt_size_isoc;
+		if (dvb_max_packet_size < 0)
+			return dvb_max_packet_size;
+		packet_multiplier = EM28XX_DVB_NUM_ISOC_PACKETS;
+		dvb_alt = dev->dvb_alt_isoc;
+	}
+
+	if (!dev->board.has_dual_ts)
+		usb_set_interface(udev, dev->ifnum, dvb_alt);
+
+	rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
+	if (rc < 0)
+		return rc;
+
+	dprintk(1, "Using %d buffers each with %d x %d bytes, alternate %d\n",
+		EM28XX_DVB_NUM_BUFS,
+		packet_multiplier,
+		dvb_max_packet_size, dvb_alt);
+
+	return em28xx_init_usb_xfer(dev, EM28XX_DIGITAL_MODE,
+				    dev->dvb_xfer_bulk,
+				    EM28XX_DVB_NUM_BUFS,
+				    dvb_max_packet_size,
+				    packet_multiplier,
+				    em28xx_dvb_urb_data_copy);
+}
+
+static int em28xx_stop_streaming(struct em28xx_dvb *dvb)
+{
+	struct em28xx_i2c_bus *i2c_bus = dvb->adapter.priv;
+	struct em28xx *dev = i2c_bus->dev;
+
+	em28xx_stop_urbs(dev);
+
+	return 0;
+}
+
+static int em28xx_start_feed(struct dvb_demux_feed *feed)
+{
+	struct dvb_demux *demux  = feed->demux;
+	struct em28xx_dvb *dvb = demux->priv;
+	int rc, ret;
+
+	if (!demux->dmx.frontend)
+		return -EINVAL;
+
+	mutex_lock(&dvb->lock);
+	dvb->nfeeds++;
+	rc = dvb->nfeeds;
+
+	if (dvb->nfeeds == 1) {
+		ret = em28xx_start_streaming(dvb);
+		if (ret < 0)
+			rc = ret;
+	}
+
+	mutex_unlock(&dvb->lock);
+	return rc;
+}
+
+static int em28xx_stop_feed(struct dvb_demux_feed *feed)
+{
+	struct dvb_demux *demux  = feed->demux;
+	struct em28xx_dvb *dvb = demux->priv;
+	int err = 0;
+
+	mutex_lock(&dvb->lock);
+	dvb->nfeeds--;
+
+	if (!dvb->nfeeds)
+		err = em28xx_stop_streaming(dvb);
+
+	mutex_unlock(&dvb->lock);
+	return err;
+}
+
+/* ------------------------------------------------------------------ */
+static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
+{
+	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
+	struct em28xx *dev = i2c_bus->dev;
+
+	if (acquire)
+		return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
+	else
+		return em28xx_set_mode(dev, EM28XX_SUSPEND);
+}
+
+/* ------------------------------------------------------------------ */
+
+static struct lgdt330x_config em2880_lgdt3303_dev = {
+	.demod_chip = LGDT3303,
+};
+
+static struct lgdt3305_config em2870_lgdt3304_dev = {
+	.i2c_addr           = 0x0e,
+	.demod_chip         = LGDT3304,
+	.spectral_inversion = 1,
+	.deny_i2c_rptr      = 1,
+	.mpeg_mode          = LGDT3305_MPEG_PARALLEL,
+	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
+	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
+	.vsb_if_khz         = 3250,
+	.qam_if_khz         = 4000,
+};
+
+static struct lgdt3305_config em2874_lgdt3305_dev = {
+	.i2c_addr           = 0x0e,
+	.demod_chip         = LGDT3305,
+	.spectral_inversion = 1,
+	.deny_i2c_rptr      = 0,
+	.mpeg_mode          = LGDT3305_MPEG_SERIAL,
+	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
+	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
+	.vsb_if_khz         = 3250,
+	.qam_if_khz         = 4000,
+};
+
+static struct lgdt3305_config em2874_lgdt3305_nogate_dev = {
+	.i2c_addr           = 0x0e,
+	.demod_chip         = LGDT3305,
+	.spectral_inversion = 1,
+	.deny_i2c_rptr      = 1,
+	.mpeg_mode          = LGDT3305_MPEG_SERIAL,
+	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
+	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
+	.vsb_if_khz         = 3600,
+	.qam_if_khz         = 3600,
+};
+
+static struct s921_config sharp_isdbt = {
+	.demod_address = 0x30 >> 1
+};
+
+static struct zl10353_config em28xx_zl10353_with_xc3028 = {
+	.demod_address = (0x1e >> 1),
+	.no_tuner = 1,
+	.parallel_ts = 1,
+	.if2 = 45600,
+};
+
+static struct s5h1409_config em28xx_s5h1409_with_xc3028 = {
+	.demod_address = 0x32 >> 1,
+	.output_mode   = S5H1409_PARALLEL_OUTPUT,
+	.gpio          = S5H1409_GPIO_OFF,
+	.inversion     = S5H1409_INVERSION_OFF,
+	.status_mode   = S5H1409_DEMODLOCKING,
+	.mpeg_timing   = S5H1409_MPEGTIMING_CONTINUOUS_NONINVERTING_CLOCK
+};
+
+static struct tda18271_std_map kworld_a340_std_map = {
+	.atsc_6   = { .if_freq = 3250, .agc_mode = 3, .std = 0,
+		      .if_lvl = 1, .rfagc_top = 0x37, },
+	.qam_6    = { .if_freq = 4000, .agc_mode = 3, .std = 1,
+		      .if_lvl = 1, .rfagc_top = 0x37, },
+};
+
+static struct tda18271_config kworld_a340_config = {
+	.std_map           = &kworld_a340_std_map,
+};
+
+static struct tda18271_config kworld_ub435q_v2_config = {
+	.std_map	= &kworld_a340_std_map,
+	.gate		= TDA18271_GATE_DIGITAL,
+};
+
+static struct tda18212_config kworld_ub435q_v3_config = {
+	.if_atsc_vsb	= 3600,
+	.if_atsc_qam	= 3600,
+};
+
+static struct zl10353_config em28xx_zl10353_xc3028_no_i2c_gate = {
+	.demod_address = (0x1e >> 1),
+	.no_tuner = 1,
+	.disable_i2c_gate_ctrl = 1,
+	.parallel_ts = 1,
+	.if2 = 45600,
+};
+
+static struct drxd_config em28xx_drxd = {
+	.demod_address = 0x70,
+	.demod_revision = 0xa2,
+	.pll_type = DRXD_PLL_NONE,
+	.clock = 12000,
+	.insert_rs_byte = 1,
+	.IF = 42800000,
+	.disable_i2c_gate_ctrl = 1,
+};
+
+static struct drxk_config terratec_h5_drxk = {
+	.adr = 0x29,
+	.single_master = 1,
+	.no_i2c_bridge = 1,
+	.microcode_name = "dvb-usb-terratec-h5-drxk.fw",
+	.qam_demod_parameter_count = 2,
+};
+
+static struct drxk_config hauppauge_930c_drxk = {
+	.adr = 0x29,
+	.single_master = 1,
+	.no_i2c_bridge = 1,
+	.microcode_name = "dvb-usb-hauppauge-hvr930c-drxk.fw",
+	.chunk_size = 56,
+	.qam_demod_parameter_count = 2,
+};
+
+static struct drxk_config terratec_htc_stick_drxk = {
+	.adr = 0x29,
+	.single_master = 1,
+	.no_i2c_bridge = 1,
+	.microcode_name = "dvb-usb-terratec-htc-stick-drxk.fw",
+	.chunk_size = 54,
+	.qam_demod_parameter_count = 2,
+	/* Required for the antenna_gpio to disable LNA. */
+	.antenna_dvbt = true,
+	/* The windows driver uses the same. This will disable LNA. */
+	.antenna_gpio = 0x6,
+};
+
+static struct drxk_config maxmedia_ub425_tc_drxk = {
+	.adr = 0x29,
+	.single_master = 1,
+	.no_i2c_bridge = 1,
+	.microcode_name = "dvb-demod-drxk-01.fw",
+	.chunk_size = 62,
+	.qam_demod_parameter_count = 2,
+};
+
+static struct drxk_config pctv_520e_drxk = {
+	.adr = 0x29,
+	.single_master = 1,
+	.microcode_name = "dvb-demod-drxk-pctv.fw",
+	.qam_demod_parameter_count = 2,
+	.chunk_size = 58,
+	.antenna_dvbt = true, /* disable LNA */
+	.antenna_gpio = (1 << 2), /* disable LNA */
+};
+
+static int drxk_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+	struct em28xx_dvb *dvb = fe->sec_priv;
+	int status;
+
+	if (!dvb)
+		return -EINVAL;
+
+	if (enable) {
+		down(&dvb->pll_mutex);
+		status = dvb->gate_ctrl(fe, 1);
+	} else {
+		status = dvb->gate_ctrl(fe, 0);
+		up(&dvb->pll_mutex);
+	}
+	return status;
+}
+
+static void hauppauge_hvr930c_init(struct em28xx *dev)
+{
+	int i;
+
+	struct em28xx_reg_seq hauppauge_hvr930c_init[] = {
+		{EM2874_R80_GPIO_P0_CTRL,	0xff,	0xff,	0x65},
+		{EM2874_R80_GPIO_P0_CTRL,	0xfb,	0xff,	0x32},
+		{EM2874_R80_GPIO_P0_CTRL,	0xff,	0xff,	0xb8},
+		{	-1,			-1,	-1,	-1},
+	};
+	struct em28xx_reg_seq hauppauge_hvr930c_end[] = {
+		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x01},
+		{EM2874_R80_GPIO_P0_CTRL,	0xaf,	0xff,	0x65},
+		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x76},
+		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x01},
+		{EM2874_R80_GPIO_P0_CTRL,	0xcf,	0xff,	0x0b},
+		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x40},
+
+		{EM2874_R80_GPIO_P0_CTRL,	0xcf,	0xff,	0x65},
+		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x65},
+		{EM2874_R80_GPIO_P0_CTRL,	0xcf,	0xff,	0x0b},
+		{EM2874_R80_GPIO_P0_CTRL,	0xef,	0xff,	0x65},
+
+		{	-1,			-1,	-1,	-1},
+	};
+
+	struct {
+		unsigned char r[4];
+		int len;
+	} regs[] = {
+		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
+		{{ 0x01, 0x02 }, 2},
+		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
+		{{ 0x01, 0x00 }, 2},
+		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
+		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
+		{{ 0x01, 0x00 }, 2},
+		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
+		{{ 0x04, 0x00 }, 2},
+		{{ 0x00, 0x04 }, 2},
+		{{ 0x00, 0x04, 0x00, 0x0a }, 4},
+		{{ 0x04, 0x14 }, 2},
+		{{ 0x04, 0x14, 0x00, 0x00 }, 4},
+	};
+
+	em28xx_gpio_set(dev, hauppauge_hvr930c_init);
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
+	usleep_range(10000, 11000);
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
+	usleep_range(10000, 11000);
+
+	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
+
+	for (i = 0; i < ARRAY_SIZE(regs); i++)
+		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
+				regs[i].r, regs[i].len);
+	em28xx_gpio_set(dev, hauppauge_hvr930c_end);
+
+	msleep(100);
+
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
+	msleep(30);
+
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x45);
+	usleep_range(10000, 11000);
+}
+
+static void terratec_h5_init(struct em28xx *dev)
+{
+	int i;
+	struct em28xx_reg_seq terratec_h5_init[] = {
+		{EM2820_R08_GPIO_CTRL,		0xff,	0xff,	10},
+		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
+		{EM2874_R80_GPIO_P0_CTRL,	0xf2,	0xff,	50},
+		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
+		{	-1,			-1,	-1,	-1},
+	};
+	struct em28xx_reg_seq terratec_h5_end[] = {
+		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	100},
+		{EM2874_R80_GPIO_P0_CTRL,	0xa6,	0xff,	50},
+		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	100},
+		{	-1,			-1,	-1,	-1},
+	};
+	struct {
+		unsigned char r[4];
+		int len;
+	} regs[] = {
+		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
+		{{ 0x01, 0x02 }, 2},
+		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
+		{{ 0x01, 0x00 }, 2},
+		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
+		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
+		{{ 0x01, 0x00 }, 2},
+		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
+		{{ 0x04, 0x00 }, 2},
+		{{ 0x00, 0x04 }, 2},
+		{{ 0x00, 0x04, 0x00, 0x0a }, 4},
+		{{ 0x04, 0x14 }, 2},
+		{{ 0x04, 0x14, 0x00, 0x00 }, 4},
+	};
+
+	em28xx_gpio_set(dev, terratec_h5_init);
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
+	usleep_range(10000, 11000);
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x45);
+	usleep_range(10000, 11000);
+
+	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
+
+	for (i = 0; i < ARRAY_SIZE(regs); i++)
+		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
+				regs[i].r, regs[i].len);
+	em28xx_gpio_set(dev, terratec_h5_end);
+};
+
+static void terratec_htc_stick_init(struct em28xx *dev)
+{
+	int i;
+
+	/*
+	 * GPIO configuration:
+	 * 0xff: unknown (does not affect DVB-T).
+	 * 0xf6: DRX-K (demodulator).
+	 * 0xe6: unknown (does not affect DVB-T).
+	 * 0xb6: unknown (does not affect DVB-T).
+	 */
+	struct em28xx_reg_seq terratec_htc_stick_init[] = {
+		{EM2820_R08_GPIO_CTRL,		0xff,	0xff,	10},
+		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
+		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	50},
+		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	100},
+		{	-1,			-1,	-1,	-1},
+	};
+	struct em28xx_reg_seq terratec_htc_stick_end[] = {
+		{EM2874_R80_GPIO_P0_CTRL,	0xb6,	0xff,	100},
+		{EM2874_R80_GPIO_P0_CTRL,	0xf6,	0xff,	50},
+		{	-1,			-1,	-1,	-1},
+	};
+
+	/*
+	 * Init the analog decoder (not yet supported), but
+	 * it's probably still a good idea.
+	 */
+	struct {
+		unsigned char r[4];
+		int len;
+	} regs[] = {
+		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
+		{{ 0x01, 0x02 }, 2},
+		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
+		{{ 0x01, 0x00 }, 2},
+		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
+	};
+
+	em28xx_gpio_set(dev, terratec_htc_stick_init);
+
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
+	usleep_range(10000, 11000);
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
+	usleep_range(10000, 11000);
+
+	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
+
+	for (i = 0; i < ARRAY_SIZE(regs); i++)
+		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
+				regs[i].r, regs[i].len);
+
+	em28xx_gpio_set(dev, terratec_htc_stick_end);
+};
+
+static void terratec_htc_usb_xs_init(struct em28xx *dev)
+{
+	int i;
+
+	struct em28xx_reg_seq terratec_htc_usb_xs_init[] = {
+		{EM2820_R08_GPIO_CTRL,		0xff,	0xff,	10},
+		{EM2874_R80_GPIO_P0_CTRL,	0xb2,	0xff,	100},
+		{EM2874_R80_GPIO_P0_CTRL,	0xb2,	0xff,	50},
+		{EM2874_R80_GPIO_P0_CTRL,	0xb6,	0xff,	100},
+		{	-1,			-1,	-1,	-1},
+	};
+	struct em28xx_reg_seq terratec_htc_usb_xs_end[] = {
+		{EM2874_R80_GPIO_P0_CTRL,	0xa6,	0xff,	100},
+		{EM2874_R80_GPIO_P0_CTRL,	0xa6,	0xff,	50},
+		{EM2874_R80_GPIO_P0_CTRL,	0xe6,	0xff,	100},
+		{	-1,			-1,	-1,	-1},
+	};
+
+	/*
+	 * Init the analog decoder (not yet supported), but
+	 * it's probably still a good idea.
+	 */
+	struct {
+		unsigned char r[4];
+		int len;
+	} regs[] = {
+		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
+		{{ 0x01, 0x02 }, 2},
+		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
+		{{ 0x01, 0x00 }, 2},
+		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
+		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
+		{{ 0x01, 0x00 }, 2},
+		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
+		{{ 0x04, 0x00 }, 2},
+		{{ 0x00, 0x04 }, 2},
+		{{ 0x00, 0x04, 0x00, 0x0a }, 4},
+		{{ 0x04, 0x14 }, 2},
+		{{ 0x04, 0x14, 0x00, 0x00 }, 4},
+	};
+
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
+
+	em28xx_gpio_set(dev, terratec_htc_usb_xs_init);
+
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
+	usleep_range(10000, 11000);
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
+	usleep_range(10000, 11000);
+
+	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1;
+
+	for (i = 0; i < ARRAY_SIZE(regs); i++)
+		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
+				regs[i].r, regs[i].len);
+
+	em28xx_gpio_set(dev, terratec_htc_usb_xs_end);
+};
+
+static void pctv_520e_init(struct em28xx *dev)
+{
+	/*
+	 * Init AVF4910B analog decoder. Looks like I2C traffic to
+	 * digital demodulator and tuner are routed via AVF4910B.
+	 */
+	int i;
+	struct {
+		unsigned char r[4];
+		int len;
+	} regs[] = {
+		{{ 0x06, 0x02, 0x00, 0x31 }, 4},
+		{{ 0x01, 0x02 }, 2},
+		{{ 0x01, 0x02, 0x00, 0xc6 }, 4},
+		{{ 0x01, 0x00 }, 2},
+		{{ 0x01, 0x00, 0xff, 0xaf }, 4},
+		{{ 0x01, 0x00, 0x03, 0xa0 }, 4},
+		{{ 0x01, 0x00 }, 2},
+		{{ 0x01, 0x00, 0x73, 0xaf }, 4},
+	};
+
+	dev->i2c_client[dev->def_i2c_bus].addr = 0x82 >> 1; /* 0x41 */
+
+	for (i = 0; i < ARRAY_SIZE(regs); i++)
+		i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
+				regs[i].r, regs[i].len);
+};
+
+static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
+	struct em28xx *dev = i2c_bus->dev;
+#ifdef CONFIG_GPIOLIB
+	struct em28xx_dvb *dvb = dev->dvb;
+	int ret;
+	unsigned long flags;
+
+	if (c->lna == 1)
+		flags = GPIOF_OUT_INIT_HIGH; /* enable LNA */
+	else
+		flags = GPIOF_OUT_INIT_LOW; /* disable LNA */
+
+	ret = gpio_request_one(dvb->lna_gpio, flags, NULL);
+	if (ret)
+		dev_err(&dev->intf->dev, "gpio request failed %d\n", ret);
+	else
+		gpio_free(dvb->lna_gpio);
+
+	return ret;
+#else
+	dev_warn(&dev->intf->dev, "%s: LNA control is disabled (lna=%u)\n",
+		 KBUILD_MODNAME, c->lna);
+	return 0;
+#endif
+}
+
+static int em28xx_pctv_292e_set_lna(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
+	struct em28xx *dev = i2c_bus->dev;
+	u8 lna;
+
+	if (c->lna == 1)
+		lna = 0x01;
+	else
+		lna = 0x00;
+
+	return em28xx_write_reg_bits(dev, EM2874_R80_GPIO_P0_CTRL, lna, 0x01);
+}
+
+static int em28xx_mt352_terratec_xs_init(struct dvb_frontend *fe)
+{
+	/* Values extracted from a USB trace of the Terratec Windows driver */
+	static u8 clock_config[]   = { CLOCK_CTL,  0x38, 0x2c };
+	static u8 reset[]          = { RESET,      0x80 };
+	static u8 adc_ctl_1_cfg[]  = { ADC_CTL_1,  0x40 };
+	static u8 agc_cfg[]        = { AGC_TARGET, 0x28, 0xa0 };
+	static u8 input_freq_cfg[] = { INPUT_FREQ_1, 0x31, 0xb8 };
+	static u8 rs_err_cfg[]     = { RS_ERR_PER_1, 0x00, 0x4d };
+	static u8 capt_range_cfg[] = { CAPT_RANGE, 0x32 };
+	static u8 trl_nom_cfg[]    = { TRL_NOMINAL_RATE_1, 0x64, 0x00 };
+	static u8 tps_given_cfg[]  = { TPS_GIVEN_1, 0x40, 0x80, 0x50 };
+	static u8 tuner_go[]       = { TUNER_GO, 0x01};
+
+	mt352_write(fe, clock_config,   sizeof(clock_config));
+	usleep_range(200, 250);
+	mt352_write(fe, reset,          sizeof(reset));
+	mt352_write(fe, adc_ctl_1_cfg,  sizeof(adc_ctl_1_cfg));
+	mt352_write(fe, agc_cfg,        sizeof(agc_cfg));
+	mt352_write(fe, input_freq_cfg, sizeof(input_freq_cfg));
+	mt352_write(fe, rs_err_cfg,     sizeof(rs_err_cfg));
+	mt352_write(fe, capt_range_cfg, sizeof(capt_range_cfg));
+	mt352_write(fe, trl_nom_cfg,    sizeof(trl_nom_cfg));
+	mt352_write(fe, tps_given_cfg,  sizeof(tps_given_cfg));
+	mt352_write(fe, tuner_go,       sizeof(tuner_go));
+	return 0;
+}
+
+static void px_bcud_init(struct em28xx *dev)
+{
+	int i;
+	struct {
+		unsigned char r[4];
+		int len;
+	} regs1[] = {
+		{{ 0x0e, 0x77 }, 2},
+		{{ 0x0f, 0x77 }, 2},
+		{{ 0x03, 0x90 }, 2},
+	}, regs2[] = {
+		{{ 0x07, 0x01 }, 2},
+		{{ 0x08, 0x10 }, 2},
+		{{ 0x13, 0x00 }, 2},
+		{{ 0x17, 0x00 }, 2},
+		{{ 0x03, 0x01 }, 2},
+		{{ 0x10, 0xb1 }, 2},
+		{{ 0x11, 0x40 }, 2},
+		{{ 0x85, 0x7a }, 2},
+		{{ 0x87, 0x04 }, 2},
+	};
+	static struct em28xx_reg_seq gpio[] = {
+		{EM28XX_R06_I2C_CLK,		0x40,	0xff,	300},
+		{EM2874_R80_GPIO_P0_CTRL,	0xfd,	0xff,	60},
+		{EM28XX_R15_RGAIN,		0x20,	0xff,	0},
+		{EM28XX_R16_GGAIN,		0x20,	0xff,	0},
+		{EM28XX_R17_BGAIN,		0x20,	0xff,	0},
+		{EM28XX_R18_ROFFSET,		0x00,	0xff,	0},
+		{EM28XX_R19_GOFFSET,		0x00,	0xff,	0},
+		{EM28XX_R1A_BOFFSET,		0x00,	0xff,	0},
+		{EM28XX_R23_UOFFSET,		0x00,	0xff,	0},
+		{EM28XX_R24_VOFFSET,		0x00,	0xff,	0},
+		{EM28XX_R26_COMPR,		0x00,	0xff,	0},
+		{0x13,				0x08,	0xff,	0},
+		{EM28XX_R12_VINENABLE,		0x27,	0xff,	0},
+		{EM28XX_R0C_USBSUSP,		0x10,	0xff,	0},
+		{EM28XX_R27_OUTFMT,		0x00,	0xff,	0},
+		{EM28XX_R10_VINMODE,		0x00,	0xff,	0},
+		{EM28XX_R11_VINCTRL,		0x11,	0xff,	0},
+		{EM2874_R50_IR_CONFIG,		0x01,	0xff,	0},
+		{EM2874_R5F_TS_ENABLE,		0x80,	0xff,	0},
+		{EM28XX_R06_I2C_CLK,		0x46,	0xff,	0},
+	};
+	em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x46);
+	/* sleeping ISDB-T */
+	dev->dvb->i2c_client_demod->addr = 0x14;
+	for (i = 0; i < ARRAY_SIZE(regs1); i++)
+		i2c_master_send(dev->dvb->i2c_client_demod,
+				regs1[i].r, regs1[i].len);
+	/* sleeping ISDB-S */
+	dev->dvb->i2c_client_demod->addr = 0x15;
+	for (i = 0; i < ARRAY_SIZE(regs2); i++)
+		i2c_master_send(dev->dvb->i2c_client_demod, regs2[i].r,
+				regs2[i].len);
+	for (i = 0; i < ARRAY_SIZE(gpio); i++) {
+		em28xx_write_reg_bits(dev, gpio[i].reg, gpio[i].val,
+				      gpio[i].mask);
+		if (gpio[i].sleep > 0)
+			msleep(gpio[i].sleep);
+	}
+};
+
+static struct mt352_config terratec_xs_mt352_cfg = {
+	.demod_address = (0x1e >> 1),
+	.no_tuner = 1,
+	.if2 = 45600,
+	.demod_init = em28xx_mt352_terratec_xs_init,
+};
+
+static struct tda10023_config em28xx_tda10023_config = {
+	.demod_address = 0x0c,
+	.invert = 1,
+};
+
+static struct cxd2820r_config em28xx_cxd2820r_config = {
+	.i2c_address = (0xd8 >> 1),
+	.ts_mode = CXD2820R_TS_SERIAL,
+};
+
+static struct tda18271_config em28xx_cxd2820r_tda18271_config = {
+	.output_opt = TDA18271_OUTPUT_LT_OFF,
+	.gate = TDA18271_GATE_DIGITAL,
+};
+
+static struct zl10353_config em28xx_zl10353_no_i2c_gate_dev = {
+	.demod_address = (0x1e >> 1),
+	.disable_i2c_gate_ctrl = 1,
+	.no_tuner = 1,
+	.parallel_ts = 1,
+};
+
+static struct mt2060_config em28xx_mt2060_config = {
+	.i2c_address = 0x60,
+};
+
+static struct qt1010_config em28xx_qt1010_config = {
+	.i2c_address = 0x62
+};
+
+static const struct mb86a20s_config c3tech_duo_mb86a20s_config = {
+	.demod_address = 0x10,
+	.is_serial = true,
+};
+
+static struct tda18271_std_map mb86a20s_tda18271_config = {
+	.dvbt_6   = { .if_freq = 4000, .agc_mode = 3, .std = 4,
+		      .if_lvl = 1, .rfagc_top = 0x37, },
+};
+
+static struct tda18271_config c3tech_duo_tda18271_config = {
+	.std_map = &mb86a20s_tda18271_config,
+	.gate    = TDA18271_GATE_DIGITAL,
+	.small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
+};
+
+static struct tda18271_std_map drx_j_std_map = {
+	.atsc_6   = { .if_freq = 5000, .agc_mode = 3, .std = 0, .if_lvl = 1,
+		      .rfagc_top = 0x37, },
+	.qam_6    = { .if_freq = 5380, .agc_mode = 3, .std = 3, .if_lvl = 1,
+		      .rfagc_top = 0x37, },
+};
+
+static struct tda18271_config pinnacle_80e_dvb_config = {
+	.std_map = &drx_j_std_map,
+	.gate    = TDA18271_GATE_DIGITAL,
+	.role    = TDA18271_MASTER,
+};
+
+static struct lgdt3306a_config hauppauge_01595_lgdt3306a_config = {
+	.qam_if_khz         = 4000,
+	.vsb_if_khz         = 3250,
+	.spectral_inversion = 0,
+	.deny_i2c_rptr      = 0,
+	.mpeg_mode          = LGDT3306A_MPEG_SERIAL,
+	.tpclk_edge         = LGDT3306A_TPCLK_RISING_EDGE,
+	.tpvalid_polarity   = LGDT3306A_TP_VALID_HIGH,
+	.xtalMHz            = 25,
+};
+
+/* ------------------------------------------------------------------ */
+
+static noinline_for_stack int em28xx_attach_xc3028(u8 addr, struct em28xx *dev)
+{
+	struct dvb_frontend *fe;
+	struct xc2028_config cfg;
+	struct xc2028_ctrl ctl;
+
+	memset(&cfg, 0, sizeof(cfg));
+	cfg.i2c_adap  = &dev->i2c_adap[dev->def_i2c_bus];
+	cfg.i2c_addr  = addr;
+
+	memset(&ctl, 0, sizeof(ctl));
+	em28xx_setup_xc3028(dev, &ctl);
+	cfg.ctrl  = &ctl;
+
+	if (!dev->dvb->fe[0]) {
+		dev_err(&dev->intf->dev,
+			"dvb frontend not attached. Can't attach xc3028\n");
+		return -EINVAL;
+	}
+
+	fe = dvb_attach(xc2028_attach, dev->dvb->fe[0], &cfg);
+	if (!fe) {
+		dev_err(&dev->intf->dev, "xc3028 attach failed\n");
+		dvb_frontend_detach(dev->dvb->fe[0]);
+		dev->dvb->fe[0] = NULL;
+		return -EINVAL;
+	}
+
+	dev_info(&dev->intf->dev, "xc3028 attached\n");
+
+	return 0;
+}
+
+/* ------------------------------------------------------------------ */
+
+static int em28xx_register_dvb(struct em28xx_dvb *dvb, struct module *module,
+			       struct em28xx *dev, struct device *device)
+{
+	int result;
+	bool create_rf_connector = false;
+
+	mutex_init(&dvb->lock);
+
+	/* register adapter */
+	result = dvb_register_adapter(&dvb->adapter,
+				      dev_name(&dev->intf->dev), module,
+				      device, adapter_nr);
+	if (result < 0) {
+		dev_warn(&dev->intf->dev,
+			 "dvb_register_adapter failed (errno = %d)\n",
+			 result);
+		goto fail_adapter;
+	}
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	dvb->adapter.mdev = dev->media_dev;
+#endif
+
+	/* Ensure all frontends negotiate bus access */
+	dvb->fe[0]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
+	if (dvb->fe[1])
+		dvb->fe[1]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
+
+	dvb->adapter.priv = &dev->i2c_bus[dev->def_i2c_bus];
+
+	/* register frontend */
+	result = dvb_register_frontend(&dvb->adapter, dvb->fe[0]);
+	if (result < 0) {
+		dev_warn(&dev->intf->dev,
+			 "dvb_register_frontend failed (errno = %d)\n",
+			 result);
+		goto fail_frontend0;
+	}
+
+	/* register 2nd frontend */
+	if (dvb->fe[1]) {
+		result = dvb_register_frontend(&dvb->adapter, dvb->fe[1]);
+		if (result < 0) {
+			dev_warn(&dev->intf->dev,
+				 "2nd dvb_register_frontend failed (errno = %d)\n",
+				 result);
+			goto fail_frontend1;
+		}
+	}
+
+	/* register demux stuff */
+	dvb->demux.dmx.capabilities =
+		DMX_TS_FILTERING | DMX_SECTION_FILTERING |
+		DMX_MEMORY_BASED_FILTERING;
+	dvb->demux.priv       = dvb;
+	dvb->demux.filternum  = 256;
+	dvb->demux.feednum    = 256;
+	dvb->demux.start_feed = em28xx_start_feed;
+	dvb->demux.stop_feed  = em28xx_stop_feed;
+
+	result = dvb_dmx_init(&dvb->demux);
+	if (result < 0) {
+		dev_warn(&dev->intf->dev,
+			 "dvb_dmx_init failed (errno = %d)\n",
+			 result);
+		goto fail_dmx;
+	}
+
+	dvb->dmxdev.filternum    = 256;
+	dvb->dmxdev.demux        = &dvb->demux.dmx;
+	dvb->dmxdev.capabilities = 0;
+	result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
+	if (result < 0) {
+		dev_warn(&dev->intf->dev,
+			 "dvb_dmxdev_init failed (errno = %d)\n",
+			 result);
+		goto fail_dmxdev;
+	}
+
+	dvb->fe_hw.source = DMX_FRONTEND_0;
+	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
+	if (result < 0) {
+		dev_warn(&dev->intf->dev,
+			 "add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
+			 result);
+		goto fail_fe_hw;
+	}
+
+	dvb->fe_mem.source = DMX_MEMORY_FE;
+	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
+	if (result < 0) {
+		dev_warn(&dev->intf->dev,
+			 "add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
+			 result);
+		goto fail_fe_mem;
+	}
+
+	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
+	if (result < 0) {
+		dev_warn(&dev->intf->dev,
+			 "connect_frontend failed (errno = %d)\n",
+			 result);
+		goto fail_fe_conn;
+	}
+
+	/* register network adapter */
+	dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
+
+	/* If the analog part won't create RF connectors, DVB will do it */
+	if (!dev->has_video || dev->tuner_type == TUNER_ABSENT)
+		create_rf_connector = true;
+
+	result = dvb_create_media_graph(&dvb->adapter, create_rf_connector);
+	if (result < 0)
+		goto fail_create_graph;
+
+	return 0;
+
+fail_create_graph:
+	dvb_net_release(&dvb->net);
+fail_fe_conn:
+	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
+fail_fe_mem:
+	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
+fail_fe_hw:
+	dvb_dmxdev_release(&dvb->dmxdev);
+fail_dmxdev:
+	dvb_dmx_release(&dvb->demux);
+fail_dmx:
+	if (dvb->fe[1])
+		dvb_unregister_frontend(dvb->fe[1]);
+	dvb_unregister_frontend(dvb->fe[0]);
+fail_frontend1:
+	if (dvb->fe[1])
+		dvb_frontend_detach(dvb->fe[1]);
+fail_frontend0:
+	dvb_frontend_detach(dvb->fe[0]);
+	dvb_unregister_adapter(&dvb->adapter);
+fail_adapter:
+	return result;
+}
+
+static void em28xx_unregister_dvb(struct em28xx_dvb *dvb)
+{
+	dvb_net_release(&dvb->net);
+	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
+	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
+	dvb_dmxdev_release(&dvb->dmxdev);
+	dvb_dmx_release(&dvb->demux);
+	if (dvb->fe[1])
+		dvb_unregister_frontend(dvb->fe[1]);
+	dvb_unregister_frontend(dvb->fe[0]);
+	if (dvb->fe[1] && !dvb->dont_attach_fe1)
+		dvb_frontend_detach(dvb->fe[1]);
+	dvb_frontend_detach(dvb->fe[0]);
+	dvb_unregister_adapter(&dvb->adapter);
+}
+
+static int em28174_dvb_init_pctv_460e(struct em28xx *dev)
+{
+	struct em28xx_dvb *dvb = dev->dvb;
+	struct tda10071_platform_data tda10071_pdata = {};
+	struct a8293_platform_data a8293_pdata = {};
+
+	/* attach demod + tuner combo */
+	tda10071_pdata.clk = 40444000; /* 40.444 MHz */
+	tda10071_pdata.i2c_wr_max = 64;
+	tda10071_pdata.ts_mode = TDA10071_TS_SERIAL;
+	tda10071_pdata.pll_multiplier = 20;
+	tda10071_pdata.tuner_i2c_addr = 0x14;
+
+	dvb->i2c_client_demod = dvb_module_probe("tda10071", "tda10071_cx24118",
+						 &dev->i2c_adap[dev->def_i2c_bus],
+						 0x55, &tda10071_pdata);
+	if (!dvb->i2c_client_demod)
+		return -ENODEV;
+
+	dvb->fe[0] = tda10071_pdata.get_dvb_frontend(dvb->i2c_client_demod);
+
+	/* attach SEC */
+	a8293_pdata.dvb_frontend = dvb->fe[0];
+
+	dvb->i2c_client_sec = dvb_module_probe("a8293", NULL,
+					       &dev->i2c_adap[dev->def_i2c_bus],
+					       0x08, &a8293_pdata);
+	if (!dvb->i2c_client_sec) {
+		dvb_module_release(dvb->i2c_client_demod);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int em28178_dvb_init_pctv_461e(struct em28xx *dev)
+{
+	struct em28xx_dvb *dvb = dev->dvb;
+	struct i2c_adapter *i2c_adapter;
+	struct m88ds3103_platform_data m88ds3103_pdata = {};
+	struct ts2020_config ts2020_config = {};
+	struct a8293_platform_data a8293_pdata = {};
+
+	/* attach demod */
+	m88ds3103_pdata.clk = 27000000;
+	m88ds3103_pdata.i2c_wr_max = 33;
+	m88ds3103_pdata.ts_mode = M88DS3103_TS_PARALLEL;
+	m88ds3103_pdata.ts_clk = 16000;
+	m88ds3103_pdata.ts_clk_pol = 1;
+	m88ds3103_pdata.agc = 0x99;
+
+	dvb->i2c_client_demod = dvb_module_probe("m88ds3103", NULL,
+						 &dev->i2c_adap[dev->def_i2c_bus],
+						 0x68, &m88ds3103_pdata);
+	if (!dvb->i2c_client_demod)
+		return -ENODEV;
+
+	dvb->fe[0] = m88ds3103_pdata.get_dvb_frontend(dvb->i2c_client_demod);
+	i2c_adapter = m88ds3103_pdata.get_i2c_adapter(dvb->i2c_client_demod);
+
+	/* attach tuner */
+	ts2020_config.fe = dvb->fe[0];
+
+	dvb->i2c_client_tuner = dvb_module_probe("ts2020", "ts2022",
+						 i2c_adapter,
+						 0x60, &ts2020_config);
+	if (!dvb->i2c_client_tuner) {
+		dvb_module_release(dvb->i2c_client_demod);
+		return -ENODEV;
+	}
+
+	/* delegate signal strength measurement to tuner */
+	dvb->fe[0]->ops.read_signal_strength =
+			dvb->fe[0]->ops.tuner_ops.get_rf_strength;
+
+	/* attach SEC */
+	a8293_pdata.dvb_frontend = dvb->fe[0];
+	dvb->i2c_client_sec = dvb_module_probe("a8293", NULL,
+					       &dev->i2c_adap[dev->def_i2c_bus],
+					       0x08, &a8293_pdata);
+	if (!dvb->i2c_client_sec) {
+		dvb_module_release(dvb->i2c_client_tuner);
+		dvb_module_release(dvb->i2c_client_demod);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int em28178_dvb_init_pctv_292e(struct em28xx *dev)
+{
+	struct em28xx_dvb *dvb = dev->dvb;
+	struct i2c_adapter *adapter;
+	struct si2168_config si2168_config = {};
+	struct si2157_config si2157_config = {};
+
+	/* attach demod */
+	si2168_config.i2c_adapter = &adapter;
+	si2168_config.fe = &dvb->fe[0];
+	si2168_config.ts_mode = SI2168_TS_PARALLEL;
+	si2168_config.spectral_inversion = true;
+
+	dvb->i2c_client_demod = dvb_module_probe("si2168", NULL,
+						 &dev->i2c_adap[dev->def_i2c_bus],
+						 0x64, &si2168_config);
+	if (!dvb->i2c_client_demod)
+		return -ENODEV;
+
+	/* attach tuner */
+	si2157_config.fe = dvb->fe[0];
+	si2157_config.if_port = 1;
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	si2157_config.mdev = dev->media_dev;
+#endif
+	dvb->i2c_client_tuner = dvb_module_probe("si2157", NULL,
+						 adapter,
+						 0x60, &si2157_config);
+	if (!dvb->i2c_client_tuner) {
+		dvb_module_release(dvb->i2c_client_demod);
+		return -ENODEV;
+	}
+	dvb->fe[0]->ops.set_lna = em28xx_pctv_292e_set_lna;
+
+	return 0;
+}
+
+static int em28178_dvb_init_terratec_t2_stick_hd(struct em28xx *dev)
+{
+	struct em28xx_dvb *dvb = dev->dvb;
+	struct i2c_adapter *adapter;
+	struct si2168_config si2168_config = {};
+	struct si2157_config si2157_config = {};
+
+	/* attach demod */
+	si2168_config.i2c_adapter = &adapter;
+	si2168_config.fe = &dvb->fe[0];
+	si2168_config.ts_mode = SI2168_TS_PARALLEL;
+
+	dvb->i2c_client_demod = dvb_module_probe("si2168", NULL,
+						 &dev->i2c_adap[dev->def_i2c_bus],
+						 0x64, &si2168_config);
+	if (!dvb->i2c_client_demod)
+		return -ENODEV;
+
+	/* attach tuner */
+	memset(&si2157_config, 0, sizeof(si2157_config));
+	si2157_config.fe = dvb->fe[0];
+	si2157_config.if_port = 0;
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	si2157_config.mdev = dev->media_dev;
+#endif
+	dvb->i2c_client_tuner = dvb_module_probe("si2157", "si2146",
+						 adapter,
+						 0x60, &si2157_config);
+	if (!dvb->i2c_client_tuner) {
+		dvb_module_release(dvb->i2c_client_demod);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int em28178_dvb_init_plex_px_bcud(struct em28xx *dev)
+{
+	struct em28xx_dvb *dvb = dev->dvb;
+	struct tc90522_config tc90522_config = {};
+	struct qm1d1c0042_config qm1d1c0042_config = {};
+
+	/* attach demod */
+	dvb->i2c_client_demod = dvb_module_probe("tc90522", "tc90522sat",
+						 &dev->i2c_adap[dev->def_i2c_bus],
+						 0x15, &tc90522_config);
+	if (!dvb->i2c_client_demod)
+		return -ENODEV;
+
+	/* attach tuner */
+	qm1d1c0042_config.fe = tc90522_config.fe;
+	qm1d1c0042_config.lpf = 1;
+
+	dvb->i2c_client_tuner = dvb_module_probe("qm1d1c0042", NULL,
+						 tc90522_config.tuner_i2c,
+						 0x61, &qm1d1c0042_config);
+	if (!dvb->i2c_client_tuner) {
+		dvb_module_release(dvb->i2c_client_demod);
+		return -ENODEV;
+	}
+
+	dvb->fe[0] = tc90522_config.fe;
+	px_bcud_init(dev);
+
+	return 0;
+}
+
+static int em28174_dvb_init_hauppauge_wintv_dualhd_dvb(struct em28xx *dev)
+{
+	struct em28xx_dvb *dvb = dev->dvb;
+	struct i2c_adapter *adapter;
+	struct si2168_config si2168_config = {};
+	struct si2157_config si2157_config = {};
+	unsigned char addr;
+
+	/* attach demod */
+	si2168_config.i2c_adapter = &adapter;
+	si2168_config.fe = &dvb->fe[0];
+	si2168_config.ts_mode = SI2168_TS_SERIAL;
+	si2168_config.spectral_inversion = true;
+	addr = (dev->ts == PRIMARY_TS) ? 0x64 : 0x67;
+
+	dvb->i2c_client_demod = dvb_module_probe("si2168", NULL,
+						 &dev->i2c_adap[dev->def_i2c_bus],
+						 addr, &si2168_config);
+	if (!dvb->i2c_client_demod)
+		return -ENODEV;
+
+	/* attach tuner */
+	memset(&si2157_config, 0, sizeof(si2157_config));
+	si2157_config.fe = dvb->fe[0];
+	si2157_config.if_port = 1;
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	si2157_config.mdev = dev->media_dev;
+#endif
+	addr = (dev->ts == PRIMARY_TS) ? 0x60 : 0x63;
+
+	dvb->i2c_client_tuner = dvb_module_probe("si2157", NULL,
+						 adapter,
+						 addr, &si2157_config);
+	if (!dvb->i2c_client_tuner) {
+		dvb_module_release(dvb->i2c_client_demod);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int em28174_dvb_init_hauppauge_wintv_dualhd_01595(struct em28xx *dev)
+{
+	struct em28xx_dvb *dvb = dev->dvb;
+	struct i2c_adapter *adapter;
+	struct lgdt3306a_config lgdt3306a_config =  {};
+	struct si2157_config si2157_config = {};
+	unsigned char addr;
+
+	/* attach demod */
+	lgdt3306a_config = hauppauge_01595_lgdt3306a_config;
+	lgdt3306a_config.fe = &dvb->fe[0];
+	lgdt3306a_config.i2c_adapter = &adapter;
+	addr = (dev->ts == PRIMARY_TS) ? 0x59 : 0x0e;
+
+	dvb->i2c_client_demod = dvb_module_probe("lgdt3306a", NULL,
+						 &dev->i2c_adap[dev->def_i2c_bus],
+						 addr, &lgdt3306a_config);
+	if (!dvb->i2c_client_demod)
+		return -ENODEV;
+
+	/* attach tuner */
+	si2157_config.fe = dvb->fe[0];
+	si2157_config.if_port = 1;
+	si2157_config.inversion = 1;
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	si2157_config.mdev = dev->media_dev;
+#endif
+	addr = (dev->ts == PRIMARY_TS) ? 0x60 : 0x62;
+
+	dvb->i2c_client_tuner = dvb_module_probe("si2157", NULL,
+						 adapter,
+						 addr, &si2157_config);
+	if (!dvb->i2c_client_tuner) {
+		dvb_module_release(dvb->i2c_client_demod);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int em28xx_dvb_init(struct em28xx *dev)
+{
+	int result = 0, dvb_alt = 0;
+	struct em28xx_dvb *dvb;
+	struct usb_device *udev;
+
+	if (dev->is_audio_only) {
+		/* Shouldn't initialize IR for this interface */
+		return 0;
+	}
+
+	if (!dev->board.has_dvb) {
+		/* This device does not support the extension */
+		return 0;
+	}
+
+	dev_info(&dev->intf->dev, "Binding DVB extension\n");
+
+	dvb = kzalloc(sizeof(*dvb), GFP_KERNEL);
+	if (!dvb)
+		return -ENOMEM;
+
+	dev->dvb = dvb;
+	dvb->fe[0] = NULL;
+	dvb->fe[1] = NULL;
+
+	/* pre-allocate DVB usb transfer buffers */
+	if (dev->dvb_xfer_bulk) {
+		result = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE,
+					   dev->dvb_xfer_bulk,
+					   EM28XX_DVB_NUM_BUFS,
+					   512,
+					   EM28XX_DVB_BULK_PACKET_MULTIPLIER);
+	} else {
+		result = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE,
+					   dev->dvb_xfer_bulk,
+					   EM28XX_DVB_NUM_BUFS,
+					   dev->dvb_max_pkt_size_isoc,
+					   EM28XX_DVB_NUM_ISOC_PACKETS);
+	}
+	if (result) {
+		dev_err(&dev->intf->dev,
+			"failed to pre-allocate USB transfer buffers for DVB.\n");
+		kfree(dvb);
+		dev->dvb = NULL;
+		return result;
+	}
+
+	mutex_lock(&dev->lock);
+	em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
+	/* init frontend */
+	switch (dev->model) {
+	case EM2874_BOARD_LEADERSHIP_ISDBT:
+		dvb->fe[0] = dvb_attach(s921_attach,
+					&sharp_isdbt,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+
+		if (!dvb->fe[0]) {
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		break;
+	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
+	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
+	case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
+	case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
+		dvb->fe[0] = dvb_attach(lgdt330x_attach,
+					&em2880_lgdt3303_dev,
+					0x0e,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (em28xx_attach_xc3028(0x61, dev) < 0) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM2880_BOARD_KWORLD_DVB_310U:
+		dvb->fe[0] = dvb_attach(zl10353_attach,
+					&em28xx_zl10353_with_xc3028,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (em28xx_attach_xc3028(0x61, dev) < 0) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
+	case EM2882_BOARD_TERRATEC_HYBRID_XS:
+	case EM2880_BOARD_EMPIRE_DUAL_TV:
+	case EM2882_BOARD_ZOLID_HYBRID_TV_STICK:
+		dvb->fe[0] = dvb_attach(zl10353_attach,
+					&em28xx_zl10353_xc3028_no_i2c_gate,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (em28xx_attach_xc3028(0x61, dev) < 0) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM2880_BOARD_TERRATEC_HYBRID_XS:
+	case EM2880_BOARD_TERRATEC_HYBRID_XS_FR:
+	case EM2881_BOARD_PINNACLE_HYBRID_PRO:
+	case EM2882_BOARD_DIKOM_DK300:
+	case EM2882_BOARD_KWORLD_VS_DVBT:
+		/*
+		 * Those boards could have either a zl10353 or a mt352.
+		 * If the chip id isn't for zl10353, try mt352.
+		 */
+		dvb->fe[0] = dvb_attach(zl10353_attach,
+					&em28xx_zl10353_xc3028_no_i2c_gate,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (!dvb->fe[0])
+			dvb->fe[0] = dvb_attach(mt352_attach,
+						&terratec_xs_mt352_cfg,
+						&dev->i2c_adap[dev->def_i2c_bus]);
+
+		if (em28xx_attach_xc3028(0x61, dev) < 0) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM2870_BOARD_TERRATEC_XS_MT2060:
+		dvb->fe[0] = dvb_attach(zl10353_attach,
+					&em28xx_zl10353_no_i2c_gate_dev,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (dvb->fe[0]) {
+			dvb_attach(mt2060_attach, dvb->fe[0],
+				   &dev->i2c_adap[dev->def_i2c_bus],
+				   &em28xx_mt2060_config, 1220);
+		}
+		break;
+	case EM2870_BOARD_KWORLD_355U:
+		dvb->fe[0] = dvb_attach(zl10353_attach,
+					&em28xx_zl10353_no_i2c_gate_dev,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (dvb->fe[0])
+			dvb_attach(qt1010_attach, dvb->fe[0],
+				   &dev->i2c_adap[dev->def_i2c_bus],
+				   &em28xx_qt1010_config);
+		break;
+	case EM2883_BOARD_KWORLD_HYBRID_330U:
+	case EM2882_BOARD_EVGA_INDTUBE:
+		dvb->fe[0] = dvb_attach(s5h1409_attach,
+					&em28xx_s5h1409_with_xc3028,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (em28xx_attach_xc3028(0x61, dev) < 0) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM2882_BOARD_KWORLD_ATSC_315U:
+		dvb->fe[0] = dvb_attach(lgdt330x_attach,
+					&em2880_lgdt3303_dev,
+					0x0e,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (dvb->fe[0]) {
+			if (!dvb_attach(simple_tuner_attach, dvb->fe[0],
+					&dev->i2c_adap[dev->def_i2c_bus],
+					0x61, TUNER_THOMSON_DTT761X)) {
+				result = -EINVAL;
+				goto out_free;
+			}
+		}
+		break;
+	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
+	case EM2882_BOARD_PINNACLE_HYBRID_PRO_330E:
+		dvb->fe[0] = dvb_attach(drxd_attach, &em28xx_drxd, NULL,
+					&dev->i2c_adap[dev->def_i2c_bus],
+					&dev->intf->dev);
+		if (em28xx_attach_xc3028(0x61, dev) < 0) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM2870_BOARD_REDDO_DVB_C_USB_BOX:
+		/* Philips CU1216L NIM (Philips TDA10023 + Infineon TUA6034) */
+		dvb->fe[0] = dvb_attach(tda10023_attach,
+					&em28xx_tda10023_config,
+					&dev->i2c_adap[dev->def_i2c_bus],
+					0x48);
+		if (dvb->fe[0]) {
+			if (!dvb_attach(simple_tuner_attach, dvb->fe[0],
+					&dev->i2c_adap[dev->def_i2c_bus],
+					0x60, TUNER_PHILIPS_CU1216L)) {
+				result = -EINVAL;
+				goto out_free;
+			}
+		}
+		break;
+	case EM2870_BOARD_KWORLD_A340:
+		dvb->fe[0] = dvb_attach(lgdt3305_attach,
+					&em2870_lgdt3304_dev,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (!dvb->fe[0]) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
+				&dev->i2c_adap[dev->def_i2c_bus],
+				&kworld_a340_config)) {
+			dvb_frontend_detach(dvb->fe[0]);
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM28174_BOARD_PCTV_290E:
+		/* set default GPIO0 for LNA, used if GPIOLIB is undefined */
+		dvb->lna_gpio = CXD2820R_GPIO_E | CXD2820R_GPIO_O |
+				CXD2820R_GPIO_L;
+		dvb->fe[0] = dvb_attach(cxd2820r_attach,
+					&em28xx_cxd2820r_config,
+					&dev->i2c_adap[dev->def_i2c_bus],
+					&dvb->lna_gpio);
+		if (dvb->fe[0]) {
+			/* FE 0 attach tuner */
+			if (!dvb_attach(tda18271_attach,
+					dvb->fe[0],
+					0x60,
+					&dev->i2c_adap[dev->def_i2c_bus],
+					&em28xx_cxd2820r_tda18271_config)) {
+				dvb_frontend_detach(dvb->fe[0]);
+				result = -EINVAL;
+				goto out_free;
+			}
+
+#ifdef CONFIG_GPIOLIB
+			/* enable LNA for DVB-T, DVB-T2 and DVB-C */
+			result = gpio_request_one(dvb->lna_gpio,
+						  GPIOF_OUT_INIT_LOW, NULL);
+			if (result)
+				dev_err(&dev->intf->dev,
+					"gpio request failed %d\n",
+					result);
+			else
+				gpio_free(dvb->lna_gpio);
+
+			result = 0; /* continue even set LNA fails */
+#endif
+			dvb->fe[0]->ops.set_lna = em28xx_pctv_290e_set_lna;
+		}
+
+		break;
+	case EM2884_BOARD_HAUPPAUGE_WINTV_HVR_930C:
+	{
+		struct xc5000_config cfg = {};
+
+		hauppauge_hvr930c_init(dev);
+
+		dvb->fe[0] = dvb_attach(drxk_attach,
+					&hauppauge_930c_drxk,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (!dvb->fe[0]) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		/* FIXME: do we need a pll semaphore? */
+		dvb->fe[0]->sec_priv = dvb;
+		sema_init(&dvb->pll_mutex, 1);
+		dvb->gate_ctrl = dvb->fe[0]->ops.i2c_gate_ctrl;
+		dvb->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
+
+		/* Attach xc5000 */
+		cfg.i2c_address  = 0x61;
+		cfg.if_khz = 4000;
+
+		if (dvb->fe[0]->ops.i2c_gate_ctrl)
+			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 1);
+		if (!dvb_attach(xc5000_attach, dvb->fe[0],
+				&dev->i2c_adap[dev->def_i2c_bus], &cfg)) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		if (dvb->fe[0]->ops.i2c_gate_ctrl)
+			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 0);
+
+		break;
+	}
+	case EM2884_BOARD_TERRATEC_H5:
+		terratec_h5_init(dev);
+
+		dvb->fe[0] = dvb_attach(drxk_attach, &terratec_h5_drxk,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (!dvb->fe[0]) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		/* FIXME: do we need a pll semaphore? */
+		dvb->fe[0]->sec_priv = dvb;
+		sema_init(&dvb->pll_mutex, 1);
+		dvb->gate_ctrl = dvb->fe[0]->ops.i2c_gate_ctrl;
+		dvb->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
+
+		/* Attach tda18271 to DVB-C frontend */
+		if (dvb->fe[0]->ops.i2c_gate_ctrl)
+			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 1);
+		if (!dvb_attach(tda18271c2dd_attach, dvb->fe[0],
+				&dev->i2c_adap[dev->def_i2c_bus], 0x60)) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		if (dvb->fe[0]->ops.i2c_gate_ctrl)
+			dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 0);
+
+		break;
+	case EM2884_BOARD_C3TECH_DIGITAL_DUO:
+		dvb->fe[0] = dvb_attach(mb86a20s_attach,
+					&c3tech_duo_mb86a20s_config,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (dvb->fe[0])
+			dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
+				   &dev->i2c_adap[dev->def_i2c_bus],
+				   &c3tech_duo_tda18271_config);
+		break;
+	case EM28174_BOARD_PCTV_460E:
+		result = em28174_dvb_init_pctv_460e(dev);
+		if (result)
+			goto out_free;
+		break;
+	case EM2874_BOARD_DELOCK_61959:
+	case EM2874_BOARD_MAXMEDIA_UB425_TC:
+		/* attach demodulator */
+		dvb->fe[0] = dvb_attach(drxk_attach, &maxmedia_ub425_tc_drxk,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+
+		if (dvb->fe[0]) {
+			/* disable I2C-gate */
+			dvb->fe[0]->ops.i2c_gate_ctrl = NULL;
+
+			/* attach tuner */
+			if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
+					&dev->i2c_adap[dev->def_i2c_bus],
+					&em28xx_cxd2820r_tda18271_config)) {
+				dvb_frontend_detach(dvb->fe[0]);
+				result = -EINVAL;
+				goto out_free;
+			}
+		}
+		break;
+	case EM2884_BOARD_PCTV_510E:
+	case EM2884_BOARD_PCTV_520E:
+		pctv_520e_init(dev);
+
+		/* attach demodulator */
+		dvb->fe[0] = dvb_attach(drxk_attach, &pctv_520e_drxk,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+
+		if (dvb->fe[0]) {
+			/* attach tuner */
+			if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
+					&dev->i2c_adap[dev->def_i2c_bus],
+					&em28xx_cxd2820r_tda18271_config)) {
+				dvb_frontend_detach(dvb->fe[0]);
+				result = -EINVAL;
+				goto out_free;
+			}
+		}
+		break;
+	case EM2884_BOARD_ELGATO_EYETV_HYBRID_2008:
+	case EM2884_BOARD_CINERGY_HTC_STICK:
+	case EM2884_BOARD_TERRATEC_H6:
+		terratec_htc_stick_init(dev);
+
+		/* attach demodulator */
+		dvb->fe[0] = dvb_attach(drxk_attach, &terratec_htc_stick_drxk,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (!dvb->fe[0]) {
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* Attach the demodulator. */
+		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
+				&dev->i2c_adap[dev->def_i2c_bus],
+				&em28xx_cxd2820r_tda18271_config)) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM2884_BOARD_TERRATEC_HTC_USB_XS:
+		terratec_htc_usb_xs_init(dev);
+
+		/* attach demodulator */
+		dvb->fe[0] = dvb_attach(drxk_attach, &terratec_htc_stick_drxk,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (!dvb->fe[0]) {
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* Attach the demodulator. */
+		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
+				&dev->i2c_adap[dev->def_i2c_bus],
+				&em28xx_cxd2820r_tda18271_config)) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM2874_BOARD_KWORLD_UB435Q_V2:
+		dvb->fe[0] = dvb_attach(lgdt3305_attach,
+					&em2874_lgdt3305_dev,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (!dvb->fe[0]) {
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* Attach the demodulator. */
+		if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
+				&dev->i2c_adap[dev->def_i2c_bus],
+				&kworld_ub435q_v2_config)) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case EM2874_BOARD_KWORLD_UB435Q_V3:
+	{
+		struct i2c_adapter *adapter = &dev->i2c_adap[dev->def_i2c_bus];
+
+		dvb->fe[0] = dvb_attach(lgdt3305_attach,
+					&em2874_lgdt3305_nogate_dev,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (!dvb->fe[0]) {
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* attach tuner */
+		kworld_ub435q_v3_config.fe = dvb->fe[0];
+
+		dvb->i2c_client_tuner = dvb_module_probe("tda18212", NULL,
+							 adapter, 0x60,
+							 &kworld_ub435q_v3_config);
+		if (!dvb->i2c_client_tuner) {
+			dvb_frontend_detach(dvb->fe[0]);
+			result = -ENODEV;
+			goto out_free;
+		}
+		break;
+	}
+	case EM2874_BOARD_PCTV_HD_MINI_80E:
+		dvb->fe[0] = dvb_attach(drx39xxj_attach,
+					&dev->i2c_adap[dev->def_i2c_bus]);
+		if (dvb->fe[0]) {
+			dvb->fe[0] = dvb_attach(tda18271_attach, dvb->fe[0],
+						0x60,
+						&dev->i2c_adap[dev->def_i2c_bus],
+						&pinnacle_80e_dvb_config);
+			if (!dvb->fe[0]) {
+				result = -EINVAL;
+				goto out_free;
+			}
+		}
+		break;
+	case EM28178_BOARD_PCTV_461E:
+		result = em28178_dvb_init_pctv_461e(dev);
+		if (result)
+			goto out_free;
+		break;
+	case EM28178_BOARD_PCTV_292E:
+		result = em28178_dvb_init_pctv_292e(dev);
+		if (result)
+			goto out_free;
+		break;
+	case EM28178_BOARD_TERRATEC_T2_STICK_HD:
+		result = em28178_dvb_init_terratec_t2_stick_hd(dev);
+		if (result)
+			goto out_free;
+		break;
+	case EM28178_BOARD_PLEX_PX_BCUD:
+		result = em28178_dvb_init_plex_px_bcud(dev);
+		if (result)
+			goto out_free;
+		break;
+	case EM28174_BOARD_HAUPPAUGE_WINTV_DUALHD_DVB:
+		result = em28174_dvb_init_hauppauge_wintv_dualhd_dvb(dev);
+		if (result)
+			goto out_free;
+		break;
+	case EM28174_BOARD_HAUPPAUGE_WINTV_DUALHD_01595:
+		result = em28174_dvb_init_hauppauge_wintv_dualhd_01595(dev);
+		if (result)
+			goto out_free;
+		break;
+	default:
+		dev_err(&dev->intf->dev,
+			"The frontend of your DVB/ATSC card isn't supported yet\n");
+		break;
+	}
+	if (!dvb->fe[0]) {
+		dev_err(&dev->intf->dev, "frontend initialization failed\n");
+		result = -EINVAL;
+		goto out_free;
+	}
+	/* define general-purpose callback pointer */
+	dvb->fe[0]->callback = em28xx_tuner_callback;
+	if (dvb->fe[1])
+		dvb->fe[1]->callback = em28xx_tuner_callback;
+
+	/* register everything */
+	result = em28xx_register_dvb(dvb, THIS_MODULE, dev, &dev->intf->dev);
+
+	if (result < 0)
+		goto out_free;
+
+	if (dev->dvb_xfer_bulk) {
+		dvb_alt = 0;
+	} else { /* isoc */
+		dvb_alt = dev->dvb_alt_isoc;
+	}
+
+	udev = interface_to_usbdev(dev->intf);
+	usb_set_interface(udev, dev->ifnum, dvb_alt);
+	dev_info(&dev->intf->dev, "DVB extension successfully initialized\n");
+
+	kref_get(&dev->ref);
+
+ret:
+	em28xx_set_mode(dev, EM28XX_SUSPEND);
+	mutex_unlock(&dev->lock);
+	return result;
+
+out_free:
+	em28xx_uninit_usb_xfer(dev, EM28XX_DIGITAL_MODE);
+	kfree(dvb);
+	dev->dvb = NULL;
+	goto ret;
+}
+
+static inline void prevent_sleep(struct dvb_frontend_ops *ops)
+{
+	ops->set_voltage = NULL;
+	ops->sleep = NULL;
+	ops->tuner_ops.sleep = NULL;
+}
+
+static int em28xx_dvb_fini(struct em28xx *dev)
+{
+	struct em28xx_dvb *dvb;
+
+	if (dev->is_audio_only) {
+		/* Shouldn't initialize IR for this interface */
+		return 0;
+	}
+
+	if (!dev->board.has_dvb) {
+		/* This device does not support the extension */
+		return 0;
+	}
+
+	if (!dev->dvb)
+		return 0;
+
+	dev_info(&dev->intf->dev, "Closing DVB extension\n");
+
+	dvb = dev->dvb;
+
+	em28xx_uninit_usb_xfer(dev, EM28XX_DIGITAL_MODE);
+
+	if (dev->disconnected) {
+		/*
+		 * We cannot tell the device to sleep
+		 * once it has been unplugged.
+		 */
+		if (dvb->fe[0]) {
+			prevent_sleep(&dvb->fe[0]->ops);
+			dvb->fe[0]->exit = DVB_FE_DEVICE_REMOVED;
+		}
+		if (dvb->fe[1]) {
+			prevent_sleep(&dvb->fe[1]->ops);
+			dvb->fe[1]->exit = DVB_FE_DEVICE_REMOVED;
+		}
+	}
+
+	em28xx_unregister_dvb(dvb);
+
+	/* release I2C module bindings */
+	dvb_module_release(dvb->i2c_client_sec);
+	dvb_module_release(dvb->i2c_client_tuner);
+	dvb_module_release(dvb->i2c_client_demod);
+
+	kfree(dvb);
+	dev->dvb = NULL;
+	kref_put(&dev->ref, em28xx_free_device);
+
+	return 0;
+}
+
+static int em28xx_dvb_suspend(struct em28xx *dev)
+{
+	int ret = 0;
+
+	if (dev->is_audio_only)
+		return 0;
+
+	if (!dev->board.has_dvb)
+		return 0;
+
+	dev_info(&dev->intf->dev, "Suspending DVB extension\n");
+	if (dev->dvb) {
+		struct em28xx_dvb *dvb = dev->dvb;
+
+		if (dvb->fe[0]) {
+			ret = dvb_frontend_suspend(dvb->fe[0]);
+			dev_info(&dev->intf->dev, "fe0 suspend %d\n", ret);
+		}
+		if (dvb->fe[1]) {
+			dvb_frontend_suspend(dvb->fe[1]);
+			dev_info(&dev->intf->dev, "fe1 suspend %d\n", ret);
+		}
+	}
+
+	return 0;
+}
+
+static int em28xx_dvb_resume(struct em28xx *dev)
+{
+	int ret = 0;
+
+	if (dev->is_audio_only)
+		return 0;
+
+	if (!dev->board.has_dvb)
+		return 0;
+
+	dev_info(&dev->intf->dev, "Resuming DVB extension\n");
+	if (dev->dvb) {
+		struct em28xx_dvb *dvb = dev->dvb;
+
+		if (dvb->fe[0]) {
+			ret = dvb_frontend_resume(dvb->fe[0]);
+			dev_info(&dev->intf->dev, "fe0 resume %d\n", ret);
+		}
+
+		if (dvb->fe[1]) {
+			ret = dvb_frontend_resume(dvb->fe[1]);
+			dev_info(&dev->intf->dev, "fe1 resume %d\n", ret);
+		}
+	}
+
+	return 0;
+}
+
+static struct em28xx_ops dvb_ops = {
+	.id   = EM28XX_DVB,
+	.name = "Em28xx dvb Extension",
+	.init = em28xx_dvb_init,
+	.fini = em28xx_dvb_fini,
+	.suspend = em28xx_dvb_suspend,
+	.resume = em28xx_dvb_resume,
+};
+
+static int __init em28xx_dvb_register(void)
+{
+	return em28xx_register_extension(&dvb_ops);
+}
+
+static void __exit em28xx_dvb_unregister(void)
+{
+	em28xx_unregister_extension(&dvb_ops);
+}
+
+module_init(em28xx_dvb_register);
+module_exit(em28xx_dvb_unregister);