Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / media / usb / em28xx / em28xx-dvb.c
diff --git a/kernel/drivers/media/usb/em28xx/em28xx-dvb.c b/kernel/drivers/media/usb/em28xx/em28xx-dvb.c
new file mode 100644 (file)
index 0000000..a5b22c5
--- /dev/null
@@ -0,0 +1,1843 @@
+/*
+ DVB device driver for em28xx
+
+ (c) 2008-2011 Mauro Carvalho Chehab <mchehab@infradead.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; either version 2 of the License.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include "em28xx.h"
+#include <media/v4l2-common.h>
+#include <dvb_demux.h>
+#include <dvb_net.h>
+#include <dmxdev.h>
+#include <media/tuner.h>
+#include "tuner-simple.h"
+#include <linux/gpio.h>
+
+#include "lgdt330x.h"
+#include "lgdt3305.h"
+#include "zl10353.h"
+#include "s5h1409.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"
+
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
+MODULE_LICENSE("GPL");
+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)                                            \
+       printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## 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 *, int);
+       struct semaphore      pll_mutex;
+       bool                    dont_attach_fe1;
+       int                     lna_gpio;
+       struct i2c_client       *i2c_client_demod;
+       struct i2c_client       *i2c_client_tuner;
+};
+
+static inline void print_err_status(struct em28xx *dev,
+                                   int packet, int status)
+{
+       char *errmsg = "Unknown";
+
+       switch (status) {
+       case -ENOENT:
+               errmsg = "unlinked synchronuously";
+               break;
+       case -ECONNRESET:
+               errmsg = "unlinked asynchronuously";
+               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;
+       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;
+       }
+
+       usb_set_interface(dev->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 (0 == 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_address = 0x0e,
+       .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_CONTINOUS_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);
+       msleep(10);
+       em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
+       msleep(10);
+
+       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);
+       msleep(10);
+
+}
+
+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);
+       msleep(10);
+       em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x45);
+       msleep(10);
+
+       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);
+       msleep(10);
+       em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
+       msleep(10);
+
+       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);
+       msleep(10);
+       em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
+       msleep(10);
+
+       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)
+               em28xx_errdev("gpio request failed %d\n", ret);
+       else
+               gpio_free(dvb->lna_gpio);
+
+       return ret;
+#else
+       dev_warn(&dev->udev->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));
+       udelay(200);
+       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 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 const struct tda10071_config em28xx_tda10071_config = {
+       .demod_i2c_addr = 0x55, /* (0xaa >> 1) */
+       .tuner_i2c_addr = 0x14,
+       .i2c_wr_max = 64,
+       .ts_mode = TDA10071_TS_SERIAL,
+       .spec_inv = 0,
+       .xtal = 40444000, /* 40.444 MHz */
+       .pll_multiplier = 20,
+};
+
+static const struct a8293_config em28xx_a8293_config = {
+       .i2c_addr = 0x08, /* (0x10 >> 1) */
+};
+
+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 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 const struct m88ds3103_config pctv_461e_m88ds3103_config = {
+       .i2c_addr = 0x68,
+       .clock = 27000000,
+       .i2c_wr_max = 33,
+       .clock_out = 0,
+       .ts_mode = M88DS3103_TS_PARALLEL,
+       .ts_clk = 16000,
+       .ts_clk_pol = 1,
+       .agc = 0x99,
+};
+
+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 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]) {
+               em28xx_errdev("/2: dvb frontend not attached. "
+                               "Can't attach xc3028\n");
+               return -EINVAL;
+       }
+
+       fe = dvb_attach(xc2028_attach, dev->dvb->fe[0], &cfg);
+       if (!fe) {
+               em28xx_errdev("/2: xc3028 attach failed\n");
+               dvb_frontend_detach(dev->dvb->fe[0]);
+               dev->dvb->fe[0] = NULL;
+               return -EINVAL;
+       }
+
+       em28xx_info("%s/2: xc3028 attached\n", dev->name);
+
+       return 0;
+}
+
+/* ------------------------------------------------------------------ */
+
+static int em28xx_register_dvb(struct em28xx_dvb *dvb, struct module *module,
+                              struct em28xx *dev, struct device *device)
+{
+       int result;
+
+       mutex_init(&dvb->lock);
+
+       /* register adapter */
+       result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
+                                     adapter_nr);
+       if (result < 0) {
+               printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
+                      dev->name, result);
+               goto fail_adapter;
+       }
+
+       /* 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) {
+               printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
+                      dev->name, result);
+               goto fail_frontend0;
+       }
+
+       /* register 2nd frontend */
+       if (dvb->fe[1]) {
+               result = dvb_register_frontend(&dvb->adapter, dvb->fe[1]);
+               if (result < 0) {
+                       printk(KERN_WARNING "%s: 2nd dvb_register_frontend failed (errno = %d)\n",
+                              dev->name, 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) {
+               printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
+                      dev->name, 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) {
+               printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
+                      dev->name, 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) {
+               printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
+                      dev->name, 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) {
+               printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
+                      dev->name, result);
+               goto fail_fe_mem;
+       }
+
+       result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
+       if (result < 0) {
+               printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
+                      dev->name, result);
+               goto fail_fe_conn;
+       }
+
+       /* register network adapter */
+       dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
+       return 0;
+
+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 em28xx_dvb_init(struct em28xx *dev)
+{
+       int result = 0;
+       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;
+       }
+
+       em28xx_info("Binding DVB extension\n");
+
+       dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
+       if (dvb == NULL) {
+               em28xx_info("em28xx_dvb: memory allocation failed\n");
+               return -ENOMEM;
+       }
+       dev->dvb = dvb;
+       dvb->fe[0] = 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) {
+               em28xx_errdev("em28xx_dvb: 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,
+                                          &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:
+               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:
+               dvb->fe[0] = dvb_attach(zl10353_attach,
+                                          &em28xx_zl10353_xc3028_no_i2c_gate,
+                                          &dev->i2c_adap[dev->def_i2c_bus]);
+               if (dvb->fe[0] == NULL) {
+                       /* This board could have either a zl10353 or a mt352.
+                          If the chip id isn't for zl10353, try mt352 */
+                       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_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] != NULL)
+                       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,
+                                          &dev->i2c_adap[dev->def_i2c_bus]);
+               if (dvb->fe[0] != NULL) {
+                       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->udev->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)
+                               em28xx_errdev("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 */
+               memset(&cfg, 0, sizeof(cfg));
+               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] != NULL)
+                       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:
+               /* attach demod */
+               dvb->fe[0] = dvb_attach(tda10071_attach,
+                       &em28xx_tda10071_config, &dev->i2c_adap[dev->def_i2c_bus]);
+
+               /* attach SEC */
+               if (dvb->fe[0])
+                       dvb_attach(a8293_attach, dvb->fe[0], &dev->i2c_adap[dev->def_i2c_bus],
+                                  &em28xx_a8293_config);
+               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:
+               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_client *client;
+               struct i2c_adapter *adapter = &dev->i2c_adap[dev->def_i2c_bus];
+               struct i2c_board_info board_info = {
+                       .type = "tda18212",
+                       .addr = 0x60,
+                       .platform_data = &kworld_ub435q_v3_config,
+               };
+
+               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];
+               request_module("tda18212");
+               client = i2c_new_device(adapter, &board_info);
+               if (client == NULL || client->dev.driver == NULL) {
+                       dvb_frontend_detach(dvb->fe[0]);
+                       result = -ENODEV;
+                       goto out_free;
+               }
+
+               if (!try_module_get(client->dev.driver->owner)) {
+                       i2c_unregister_device(client);
+                       dvb_frontend_detach(dvb->fe[0]);
+                       result = -ENODEV;
+                       goto out_free;
+               }
+
+               dvb->i2c_client_tuner = client;
+               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] != NULL) {
+                       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:
+               {
+                       /* demod I2C adapter */
+                       struct i2c_adapter *i2c_adapter;
+                       struct i2c_client *client;
+                       struct i2c_board_info info;
+                       struct ts2020_config ts2020_config = {
+                       };
+                       memset(&info, 0, sizeof(struct i2c_board_info));
+
+                       /* attach demod */
+                       dvb->fe[0] = dvb_attach(m88ds3103_attach,
+                                       &pctv_461e_m88ds3103_config,
+                                       &dev->i2c_adap[dev->def_i2c_bus],
+                                       &i2c_adapter);
+                       if (dvb->fe[0] == NULL) {
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       /* attach tuner */
+                       ts2020_config.fe = dvb->fe[0];
+                       strlcpy(info.type, "ts2022", I2C_NAME_SIZE);
+                       info.addr = 0x60;
+                       info.platform_data = &ts2020_config;
+                       request_module("ts2020");
+                       client = i2c_new_device(i2c_adapter, &info);
+                       if (client == NULL || client->dev.driver == NULL) {
+                               dvb_frontend_detach(dvb->fe[0]);
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       if (!try_module_get(client->dev.driver->owner)) {
+                               i2c_unregister_device(client);
+                               dvb_frontend_detach(dvb->fe[0]);
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       /* delegate signal strength measurement to tuner */
+                       dvb->fe[0]->ops.read_signal_strength =
+                                       dvb->fe[0]->ops.tuner_ops.get_rf_strength;
+
+                       /* attach SEC */
+                       if (!dvb_attach(a8293_attach, dvb->fe[0],
+                                       &dev->i2c_adap[dev->def_i2c_bus],
+                                       &em28xx_a8293_config)) {
+                               module_put(client->dev.driver->owner);
+                               i2c_unregister_device(client);
+                               dvb_frontend_detach(dvb->fe[0]);
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       dvb->i2c_client_tuner = client;
+               }
+               break;
+       case EM28178_BOARD_PCTV_292E:
+               {
+                       struct i2c_adapter *adapter;
+                       struct i2c_client *client;
+                       struct i2c_board_info info;
+                       struct si2168_config si2168_config;
+                       struct si2157_config si2157_config;
+
+                       /* attach demod */
+                       memset(&si2168_config, 0, sizeof(si2168_config));
+                       si2168_config.i2c_adapter = &adapter;
+                       si2168_config.fe = &dvb->fe[0];
+                       si2168_config.ts_mode = SI2168_TS_PARALLEL;
+                       memset(&info, 0, sizeof(struct i2c_board_info));
+                       strlcpy(info.type, "si2168", I2C_NAME_SIZE);
+                       info.addr = 0x64;
+                       info.platform_data = &si2168_config;
+                       request_module(info.type);
+                       client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &info);
+                       if (client == NULL || client->dev.driver == NULL) {
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       if (!try_module_get(client->dev.driver->owner)) {
+                               i2c_unregister_device(client);
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       dvb->i2c_client_demod = client;
+
+                       /* attach tuner */
+                       memset(&si2157_config, 0, sizeof(si2157_config));
+                       si2157_config.fe = dvb->fe[0];
+                       memset(&info, 0, sizeof(struct i2c_board_info));
+                       strlcpy(info.type, "si2157", I2C_NAME_SIZE);
+                       info.addr = 0x60;
+                       info.platform_data = &si2157_config;
+                       request_module(info.type);
+                       client = i2c_new_device(adapter, &info);
+                       if (client == NULL || client->dev.driver == NULL) {
+                               module_put(dvb->i2c_client_demod->dev.driver->owner);
+                               i2c_unregister_device(dvb->i2c_client_demod);
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       if (!try_module_get(client->dev.driver->owner)) {
+                               i2c_unregister_device(client);
+                               module_put(dvb->i2c_client_demod->dev.driver->owner);
+                               i2c_unregister_device(dvb->i2c_client_demod);
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       dvb->i2c_client_tuner = client;
+                       dvb->fe[0]->ops.set_lna = em28xx_pctv_292e_set_lna;
+               }
+               break;
+       case EM28178_BOARD_TERRATEC_T2_STICK_HD:
+               {
+                       struct i2c_adapter *adapter;
+                       struct i2c_client *client;
+                       struct i2c_board_info info;
+                       struct si2168_config si2168_config;
+                       struct si2157_config si2157_config;
+
+                       /* attach demod */
+                       memset(&si2168_config, 0, sizeof(si2168_config));
+                       si2168_config.i2c_adapter = &adapter;
+                       si2168_config.fe = &dvb->fe[0];
+                       si2168_config.ts_mode = SI2168_TS_PARALLEL;
+                       memset(&info, 0, sizeof(struct i2c_board_info));
+                       strlcpy(info.type, "si2168", I2C_NAME_SIZE);
+                       info.addr = 0x64;
+                       info.platform_data = &si2168_config;
+                       request_module(info.type);
+                       client = i2c_new_device(&dev->i2c_adap[dev->def_i2c_bus], &info);
+                       if (client == NULL || client->dev.driver == NULL) {
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       if (!try_module_get(client->dev.driver->owner)) {
+                               i2c_unregister_device(client);
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       dvb->i2c_client_demod = client;
+
+                       /* attach tuner */
+                       memset(&si2157_config, 0, sizeof(si2157_config));
+                       si2157_config.fe = dvb->fe[0];
+                       memset(&info, 0, sizeof(struct i2c_board_info));
+                       strlcpy(info.type, "si2146", I2C_NAME_SIZE);
+                       info.addr = 0x60;
+                       info.platform_data = &si2157_config;
+                       request_module("si2157");
+                       client = i2c_new_device(adapter, &info);
+                       if (client == NULL || client->dev.driver == NULL) {
+                               module_put(dvb->i2c_client_demod->dev.driver->owner);
+                               i2c_unregister_device(dvb->i2c_client_demod);
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       if (!try_module_get(client->dev.driver->owner)) {
+                               i2c_unregister_device(client);
+                               module_put(dvb->i2c_client_demod->dev.driver->owner);
+                               i2c_unregister_device(dvb->i2c_client_demod);
+                               result = -ENODEV;
+                               goto out_free;
+                       }
+
+                       dvb->i2c_client_tuner = client;
+               }
+               break;
+       default:
+               em28xx_errdev("/2: The frontend of your DVB/ATSC card"
+                               " isn't supported yet\n");
+               break;
+       }
+       if (NULL == dvb->fe[0]) {
+               em28xx_errdev("/2: 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->udev->dev);
+
+       if (result < 0)
+               goto out_free;
+
+       em28xx_info("DVB extension successfully initialized\n");
+
+       kref_get(&dev->ref);
+
+ret:
+       em28xx_set_mode(dev, EM28XX_SUSPEND);
+       mutex_unlock(&dev->lock);
+       return result;
+
+out_free:
+       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;
+       struct i2c_client *client;
+
+       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;
+
+       em28xx_info("Closing DVB extension\n");
+
+       dvb = dev->dvb;
+       client = dvb->i2c_client_tuner;
+
+       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;
+               }
+       }
+
+       /* remove I2C tuner */
+       if (client) {
+               module_put(client->dev.driver->owner);
+               i2c_unregister_device(client);
+       }
+
+       /* remove I2C demod */
+       client = dvb->i2c_client_demod;
+       if (client) {
+               module_put(client->dev.driver->owner);
+               i2c_unregister_device(client);
+       }
+
+       em28xx_unregister_dvb(dvb);
+       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;
+
+       em28xx_info("Suspending DVB extension\n");
+       if (dev->dvb) {
+               struct em28xx_dvb *dvb = dev->dvb;
+
+               if (dvb->fe[0]) {
+                       ret = dvb_frontend_suspend(dvb->fe[0]);
+                       em28xx_info("fe0 suspend %d\n", ret);
+               }
+               if (dvb->fe[1]) {
+                       dvb_frontend_suspend(dvb->fe[1]);
+                       em28xx_info("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;
+
+       em28xx_info("Resuming DVB extension\n");
+       if (dev->dvb) {
+               struct em28xx_dvb *dvb = dev->dvb;
+
+               if (dvb->fe[0]) {
+                       ret = dvb_frontend_resume(dvb->fe[0]);
+                       em28xx_info("fe0 resume %d\n", ret);
+               }
+
+               if (dvb->fe[1]) {
+                       ret = dvb_frontend_resume(dvb->fe[1]);
+                       em28xx_info("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);