Initial import

1 files changed, 974 insertions, 0 deletions

diff --git a/drivers/media/usb/cx231xx/cx231xx-dvb.c b/drivers/media/usb/cx231xx/cx231xx-dvb.c
new file mode 100644
index 000000000..610d5675b
--- /dev/null
+++ b/drivers/media/usb/cx231xx/cx231xx-dvb.c
@@ -0,0 +1,974 @@
+/*
+ DVB device driver for cx231xx
+
+ Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
+		Based on em28xx driver
+
+ 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, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "cx231xx.h"
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-common.h>
+#include <media/videobuf-vmalloc.h>
+
+#include "xc5000.h"
+#include "s5h1432.h"
+#include "tda18271.h"
+#include "s5h1411.h"
+#include "lgdt3305.h"
+#include "si2165.h"
+#include "mb86a20s.h"
+#include "si2157.h"
+#include "lgdt3306a.h"
+
+MODULE_DESCRIPTION("driver for cx231xx based DVB cards");
+MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
+MODULE_LICENSE("GPL");
+
+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 CX231XX_DVB_NUM_BUFS 5
+#define CX231XX_DVB_MAX_PACKETSIZE 564
+#define CX231XX_DVB_MAX_PACKETS 64
+
+struct cx231xx_dvb {
+	struct dvb_frontend *frontend;
+
+	/* 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;
+	struct i2c_client *i2c_client_tuner;
+};
+
+static struct s5h1432_config dvico_s5h1432_config = {
+	.output_mode   = S5H1432_SERIAL_OUTPUT,
+	.gpio          = S5H1432_GPIO_ON,
+	.qam_if        = S5H1432_IF_4000,
+	.vsb_if        = S5H1432_IF_4000,
+	.inversion     = S5H1432_INVERSION_OFF,
+	.status_mode   = S5H1432_DEMODLOCKING,
+	.mpeg_timing   = S5H1432_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK,
+};
+
+static struct tda18271_std_map cnxt_rde253s_tda18271_std_map = {
+	.dvbt_6   = { .if_freq = 4000, .agc_mode = 3, .std = 4,
+		      .if_lvl = 1, .rfagc_top = 0x37, },
+	.dvbt_7   = { .if_freq = 4000, .agc_mode = 3, .std = 5,
+		      .if_lvl = 1, .rfagc_top = 0x37, },
+	.dvbt_8   = { .if_freq = 4000, .agc_mode = 3, .std = 6,
+		      .if_lvl = 1, .rfagc_top = 0x37, },
+};
+
+static struct tda18271_std_map mb86a20s_tda18271_config = {
+	.dvbt_6   = { .if_freq = 4000, .agc_mode = 3, .std = 4,
+		      .if_lvl = 0, .rfagc_top = 0x37, },
+};
+
+static struct tda18271_config cnxt_rde253s_tunerconfig = {
+	.std_map = &cnxt_rde253s_tda18271_std_map,
+	.gate    = TDA18271_GATE_ANALOG,
+};
+
+static struct s5h1411_config tda18271_s5h1411_config = {
+	.output_mode   = S5H1411_SERIAL_OUTPUT,
+	.gpio          = S5H1411_GPIO_OFF,
+	.vsb_if        = S5H1411_IF_3250,
+	.qam_if        = S5H1411_IF_4000,
+	.inversion     = S5H1411_INVERSION_ON,
+	.status_mode   = S5H1411_DEMODLOCKING,
+	.mpeg_timing   = S5H1411_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK,
+};
+static struct s5h1411_config xc5000_s5h1411_config = {
+	.output_mode   = S5H1411_SERIAL_OUTPUT,
+	.gpio          = S5H1411_GPIO_OFF,
+	.vsb_if        = S5H1411_IF_3250,
+	.qam_if        = S5H1411_IF_3250,
+	.inversion     = S5H1411_INVERSION_OFF,
+	.status_mode   = S5H1411_DEMODLOCKING,
+	.mpeg_timing   = S5H1411_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK,
+};
+
+static struct lgdt3305_config hcw_lgdt3305_config = {
+	.i2c_addr           = 0x0e,
+	.mpeg_mode          = LGDT3305_MPEG_SERIAL,
+	.tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
+	.tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
+	.deny_i2c_rptr      = 1,
+	.spectral_inversion = 1,
+	.qam_if_khz         = 4000,
+	.vsb_if_khz         = 3250,
+};
+
+static struct tda18271_std_map hauppauge_tda18271_std_map = {
+	.atsc_6   = { .if_freq = 3250, .agc_mode = 3, .std = 4,
+		      .if_lvl = 1, .rfagc_top = 0x58, },
+	.qam_6    = { .if_freq = 4000, .agc_mode = 3, .std = 5,
+		      .if_lvl = 1, .rfagc_top = 0x58, },
+};
+
+static struct tda18271_config hcw_tda18271_config = {
+	.std_map = &hauppauge_tda18271_std_map,
+	.gate    = TDA18271_GATE_DIGITAL,
+};
+
+static const struct mb86a20s_config pv_mb86a20s_config = {
+	.demod_address = 0x10,
+	.is_serial = true,
+};
+
+static struct tda18271_config pv_tda18271_config = {
+	.std_map = &mb86a20s_tda18271_config,
+	.gate    = TDA18271_GATE_DIGITAL,
+	.small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
+};
+
+static const struct si2165_config hauppauge_930C_HD_1113xx_si2165_config = {
+	.i2c_addr	= 0x64,
+	.chip_mode	= SI2165_MODE_PLL_XTAL,
+	.ref_freq_Hz	= 16000000,
+};
+
+static const struct si2165_config pctv_quatro_stick_1114xx_si2165_config = {
+	.i2c_addr	= 0x64,
+	.chip_mode	= SI2165_MODE_PLL_EXT,
+	.ref_freq_Hz	= 24000000,
+};
+
+static struct lgdt3306a_config hauppauge_955q_lgdt3306a_config = {
+	.i2c_addr           = 0x59,
+	.qam_if_khz         = 4000,
+	.vsb_if_khz         = 3250,
+	.deny_i2c_rptr      = 1,
+	.spectral_inversion = 1,
+	.mpeg_mode          = LGDT3306A_MPEG_SERIAL,
+	.tpclk_edge         = LGDT3306A_TPCLK_RISING_EDGE,
+	.tpvalid_polarity   = LGDT3306A_TP_VALID_HIGH,
+	.xtalMHz            = 25,
+};
+
+static inline void print_err_status(struct cx231xx *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) {
+		dev_dbg(dev->dev,
+			"URB status %d [%s].\n", status, errmsg);
+	} else {
+		dev_dbg(dev->dev,
+			"URB packet %d, status %d [%s].\n",
+			packet, status, errmsg);
+	}
+}
+
+static inline int dvb_isoc_copy(struct cx231xx *dev, struct urb *urb)
+{
+	int i;
+
+	if (!dev)
+		return 0;
+
+	if (dev->state & DEV_DISCONNECTED)
+		return 0;
+
+	if (urb->status < 0) {
+		print_err_status(dev, -1, urb->status);
+		if (urb->status == -ENOENT)
+			return 0;
+	}
+
+	for (i = 0; i < urb->number_of_packets; i++) {
+		int status = urb->iso_frame_desc[i].status;
+
+		if (status < 0) {
+			print_err_status(dev, i, status);
+			if (urb->iso_frame_desc[i].status != -EPROTO)
+				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 inline int dvb_bulk_copy(struct cx231xx *dev, struct urb *urb)
+{
+	if (!dev)
+		return 0;
+
+	if (dev->state & DEV_DISCONNECTED)
+		return 0;
+
+	if (urb->status < 0) {
+		print_err_status(dev, -1, urb->status);
+		if (urb->status == -ENOENT)
+			return 0;
+	}
+
+	/* Feed the transport payload into the kernel demux */
+	dvb_dmx_swfilter(&dev->dvb->demux,
+		urb->transfer_buffer, urb->actual_length);
+
+	return 0;
+}
+
+static int start_streaming(struct cx231xx_dvb *dvb)
+{
+	int rc;
+	struct cx231xx *dev = dvb->adapter.priv;
+
+	if (dev->USE_ISO) {
+		dev_dbg(dev->dev, "DVB transfer mode is ISO.\n");
+		cx231xx_set_alt_setting(dev, INDEX_TS1, 4);
+		rc = cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
+		if (rc < 0)
+			return rc;
+		dev->mode_tv = 1;
+		return cx231xx_init_isoc(dev, CX231XX_DVB_MAX_PACKETS,
+					CX231XX_DVB_NUM_BUFS,
+					dev->ts1_mode.max_pkt_size,
+					dvb_isoc_copy);
+	} else {
+		dev_dbg(dev->dev, "DVB transfer mode is BULK.\n");
+		cx231xx_set_alt_setting(dev, INDEX_TS1, 0);
+		rc = cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
+		if (rc < 0)
+			return rc;
+		dev->mode_tv = 1;
+		return cx231xx_init_bulk(dev, CX231XX_DVB_MAX_PACKETS,
+					CX231XX_DVB_NUM_BUFS,
+					dev->ts1_mode.max_pkt_size,
+					dvb_bulk_copy);
+	}
+
+}
+
+static int stop_streaming(struct cx231xx_dvb *dvb)
+{
+	struct cx231xx *dev = dvb->adapter.priv;
+
+	if (dev->USE_ISO)
+		cx231xx_uninit_isoc(dev);
+	else
+		cx231xx_uninit_bulk(dev);
+
+	cx231xx_set_mode(dev, CX231XX_SUSPEND);
+
+	return 0;
+}
+
+static int start_feed(struct dvb_demux_feed *feed)
+{
+	struct dvb_demux *demux = feed->demux;
+	struct cx231xx_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 = start_streaming(dvb);
+		if (ret < 0)
+			rc = ret;
+	}
+
+	mutex_unlock(&dvb->lock);
+	return rc;
+}
+
+static int stop_feed(struct dvb_demux_feed *feed)
+{
+	struct dvb_demux *demux = feed->demux;
+	struct cx231xx_dvb *dvb = demux->priv;
+	int err = 0;
+
+	mutex_lock(&dvb->lock);
+	dvb->nfeeds--;
+
+	if (0 == dvb->nfeeds)
+		err = stop_streaming(dvb);
+
+	mutex_unlock(&dvb->lock);
+	return err;
+}
+
+/* ------------------------------------------------------------------ */
+static int cx231xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
+{
+	struct cx231xx *dev = fe->dvb->priv;
+
+	if (acquire)
+		return cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
+	else
+		return cx231xx_set_mode(dev, CX231XX_SUSPEND);
+}
+
+/* ------------------------------------------------------------------ */
+
+static struct xc5000_config cnxt_rde250_tunerconfig = {
+	.i2c_address = 0x61,
+	.if_khz = 4000,
+};
+static struct xc5000_config cnxt_rdu250_tunerconfig = {
+	.i2c_address = 0x61,
+	.if_khz = 3250,
+};
+
+/* ------------------------------------------------------------------ */
+#if 0
+static int attach_xc5000(u8 addr, struct cx231xx *dev)
+{
+
+	struct dvb_frontend *fe;
+	struct xc5000_config cfg;
+
+	memset(&cfg, 0, sizeof(cfg));
+	cfg.i2c_adap = cx231xx_get_i2c_adap(dev, dev->board.tuner_i2c_master);
+	cfg.i2c_addr = addr;
+
+	if (!dev->dvb->frontend) {
+		dev_err(dev->dev, "%s/2: dvb frontend not attached. "
+		       "Can't attach xc5000\n", dev->name);
+		return -EINVAL;
+	}
+
+	fe = dvb_attach(xc5000_attach, dev->dvb->frontend, &cfg);
+	if (!fe) {
+		dev_err(dev->dev, "%s/2: xc5000 attach failed\n", dev->name);
+		dvb_frontend_detach(dev->dvb->frontend);
+		dev->dvb->frontend = NULL;
+		return -EINVAL;
+	}
+
+	dev_info(dev->dev, "%s/2: xc5000 attached\n", dev->name);
+
+	return 0;
+}
+#endif
+
+int cx231xx_set_analog_freq(struct cx231xx *dev, u32 freq)
+{
+	if ((dev->dvb != NULL) && (dev->dvb->frontend != NULL)) {
+
+		struct dvb_tuner_ops *dops = &dev->dvb->frontend->ops.tuner_ops;
+
+		if (dops->set_analog_params != NULL) {
+			struct analog_parameters params;
+
+			params.frequency = freq;
+			params.std = dev->norm;
+			params.mode = 0;	/* 0- Air; 1 - cable */
+			/*params.audmode = ;       */
+
+			/* Set the analog parameters to set the frequency */
+			dops->set_analog_params(dev->dvb->frontend, &params);
+		}
+
+	}
+
+	return 0;
+}
+
+int cx231xx_reset_analog_tuner(struct cx231xx *dev)
+{
+	int status = 0;
+
+	if ((dev->dvb != NULL) && (dev->dvb->frontend != NULL)) {
+
+		struct dvb_tuner_ops *dops = &dev->dvb->frontend->ops.tuner_ops;
+
+		if (dops->init != NULL && !dev->xc_fw_load_done) {
+
+			dev_dbg(dev->dev,
+				"Reloading firmware for XC5000\n");
+			status = dops->init(dev->dvb->frontend);
+			if (status == 0) {
+				dev->xc_fw_load_done = 1;
+				dev_dbg(dev->dev,
+					"XC5000 firmware download completed\n");
+			} else {
+				dev->xc_fw_load_done = 0;
+				dev_dbg(dev->dev,
+					"XC5000 firmware download failed !!!\n");
+			}
+		}
+
+	}
+
+	return status;
+}
+
+/* ------------------------------------------------------------------ */
+
+static int register_dvb(struct cx231xx_dvb *dvb,
+			struct module *module,
+			struct cx231xx *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) {
+		dev_warn(dev->dev,
+		       "%s: dvb_register_adapter failed (errno = %d)\n",
+		       dev->name, result);
+		goto fail_adapter;
+	}
+	dvb_register_media_controller(&dvb->adapter, dev->media_dev);
+
+	/* Ensure all frontends negotiate bus access */
+	dvb->frontend->ops.ts_bus_ctrl = cx231xx_dvb_bus_ctrl;
+
+	dvb->adapter.priv = dev;
+
+	/* register frontend */
+	result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
+	if (result < 0) {
+		dev_warn(dev->dev,
+		       "%s: dvb_register_frontend failed (errno = %d)\n",
+		       dev->name, result);
+		goto fail_frontend;
+	}
+
+	/* 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 = start_feed;
+	dvb->demux.stop_feed = stop_feed;
+
+	result = dvb_dmx_init(&dvb->demux);
+	if (result < 0) {
+		dev_warn(dev->dev,
+			 "%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) {
+		dev_warn(dev->dev,
+			 "%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) {
+		dev_warn(dev->dev,
+		       "%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) {
+		dev_warn(dev->dev,
+			 "%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) {
+		dev_warn(dev->dev,
+			 "%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);
+	dvb_create_media_graph(&dvb->adapter);
+
+	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:
+	dvb_unregister_frontend(dvb->frontend);
+fail_frontend:
+	dvb_frontend_detach(dvb->frontend);
+	dvb_unregister_adapter(&dvb->adapter);
+fail_adapter:
+	return result;
+}
+
+static void unregister_dvb(struct cx231xx_dvb *dvb)
+{
+	struct i2c_client *client;
+	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);
+	client = dvb->i2c_client_tuner;
+	/* remove I2C tuner */
+	if (client) {
+		module_put(client->dev.driver->owner);
+		i2c_unregister_device(client);
+	}
+	dvb_unregister_frontend(dvb->frontend);
+	dvb_frontend_detach(dvb->frontend);
+	dvb_unregister_adapter(&dvb->adapter);
+}
+
+static int dvb_init(struct cx231xx *dev)
+{
+	int result = 0;
+	struct cx231xx_dvb *dvb;
+	struct i2c_adapter *tuner_i2c;
+	struct i2c_adapter *demod_i2c;
+
+	if (!dev->board.has_dvb) {
+		/* This device does not support the extension */
+		return 0;
+	}
+
+	dvb = kzalloc(sizeof(struct cx231xx_dvb), GFP_KERNEL);
+
+	if (dvb == NULL) {
+		dev_info(dev->dev,
+			 "cx231xx_dvb: memory allocation failed\n");
+		return -ENOMEM;
+	}
+	dev->dvb = dvb;
+	dev->cx231xx_set_analog_freq = cx231xx_set_analog_freq;
+	dev->cx231xx_reset_analog_tuner = cx231xx_reset_analog_tuner;
+
+	tuner_i2c = cx231xx_get_i2c_adap(dev, dev->board.tuner_i2c_master);
+	demod_i2c = cx231xx_get_i2c_adap(dev, dev->board.demod_i2c_master);
+	mutex_lock(&dev->lock);
+	cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
+	cx231xx_demod_reset(dev);
+	/* init frontend */
+	switch (dev->model) {
+	case CX231XX_BOARD_CNXT_CARRAERA:
+	case CX231XX_BOARD_CNXT_RDE_250:
+
+		dev->dvb->frontend = dvb_attach(s5h1432_attach,
+					&dvico_s5h1432_config,
+					demod_i2c);
+
+		if (dev->dvb->frontend == NULL) {
+			dev_err(dev->dev,
+				"Failed to attach s5h1432 front end\n");
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* define general-purpose callback pointer */
+		dvb->frontend->callback = cx231xx_tuner_callback;
+
+		if (!dvb_attach(xc5000_attach, dev->dvb->frontend,
+			       tuner_i2c,
+			       &cnxt_rde250_tunerconfig)) {
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		break;
+	case CX231XX_BOARD_CNXT_SHELBY:
+	case CX231XX_BOARD_CNXT_RDU_250:
+
+		dev->dvb->frontend = dvb_attach(s5h1411_attach,
+					       &xc5000_s5h1411_config,
+					       demod_i2c);
+
+		if (dev->dvb->frontend == NULL) {
+			dev_err(dev->dev,
+				"Failed to attach s5h1411 front end\n");
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* define general-purpose callback pointer */
+		dvb->frontend->callback = cx231xx_tuner_callback;
+
+		if (!dvb_attach(xc5000_attach, dev->dvb->frontend,
+			       tuner_i2c,
+			       &cnxt_rdu250_tunerconfig)) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case CX231XX_BOARD_CNXT_RDE_253S:
+
+		dev->dvb->frontend = dvb_attach(s5h1432_attach,
+					&dvico_s5h1432_config,
+					demod_i2c);
+
+		if (dev->dvb->frontend == NULL) {
+			dev_err(dev->dev,
+				"Failed to attach s5h1432 front end\n");
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* define general-purpose callback pointer */
+		dvb->frontend->callback = cx231xx_tuner_callback;
+
+		if (!dvb_attach(tda18271_attach, dev->dvb->frontend,
+			       0x60, tuner_i2c,
+			       &cnxt_rde253s_tunerconfig)) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case CX231XX_BOARD_CNXT_RDU_253S:
+	case CX231XX_BOARD_KWORLD_UB445_USB_HYBRID:
+
+		dev->dvb->frontend = dvb_attach(s5h1411_attach,
+					       &tda18271_s5h1411_config,
+					       demod_i2c);
+
+		if (dev->dvb->frontend == NULL) {
+			dev_err(dev->dev,
+				"Failed to attach s5h1411 front end\n");
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* define general-purpose callback pointer */
+		dvb->frontend->callback = cx231xx_tuner_callback;
+
+		if (!dvb_attach(tda18271_attach, dev->dvb->frontend,
+			       0x60, tuner_i2c,
+			       &cnxt_rde253s_tunerconfig)) {
+			result = -EINVAL;
+			goto out_free;
+		}
+		break;
+	case CX231XX_BOARD_HAUPPAUGE_EXETER:
+
+		dev_info(dev->dev,
+			 "%s: looking for tuner / demod on i2c bus: %d\n",
+		       __func__, i2c_adapter_id(tuner_i2c));
+
+		dev->dvb->frontend = dvb_attach(lgdt3305_attach,
+						&hcw_lgdt3305_config,
+						tuner_i2c);
+
+		if (dev->dvb->frontend == NULL) {
+			dev_err(dev->dev,
+				"Failed to attach LG3305 front end\n");
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* define general-purpose callback pointer */
+		dvb->frontend->callback = cx231xx_tuner_callback;
+
+		dvb_attach(tda18271_attach, dev->dvb->frontend,
+			   0x60, tuner_i2c,
+			   &hcw_tda18271_config);
+		break;
+
+	case CX231XX_BOARD_HAUPPAUGE_930C_HD_1113xx:
+
+		dev->dvb->frontend = dvb_attach(si2165_attach,
+			&hauppauge_930C_HD_1113xx_si2165_config,
+			tuner_i2c
+			);
+
+		if (dev->dvb->frontend == NULL) {
+			dev_err(dev->dev,
+				"Failed to attach SI2165 front end\n");
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		dev->dvb->frontend->ops.i2c_gate_ctrl = NULL;
+
+		/* define general-purpose callback pointer */
+		dvb->frontend->callback = cx231xx_tuner_callback;
+
+		dvb_attach(tda18271_attach, dev->dvb->frontend,
+			0x60,
+			tuner_i2c,
+			&hcw_tda18271_config);
+
+		dev->cx231xx_reset_analog_tuner = NULL;
+		break;
+
+	case CX231XX_BOARD_HAUPPAUGE_930C_HD_1114xx:
+	{
+		struct i2c_client *client;
+		struct i2c_board_info info;
+		struct si2157_config si2157_config;
+
+		memset(&info, 0, sizeof(struct i2c_board_info));
+
+		dev->dvb->frontend = dvb_attach(si2165_attach,
+			&pctv_quatro_stick_1114xx_si2165_config,
+			tuner_i2c
+			);
+
+		if (dev->dvb->frontend == NULL) {
+			dev_err(dev->dev,
+				"Failed to attach SI2165 front end\n");
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		dev->dvb->frontend->ops.i2c_gate_ctrl = NULL;
+
+		/* define general-purpose callback pointer */
+		dvb->frontend->callback = cx231xx_tuner_callback;
+
+		/* attach tuner */
+		memset(&si2157_config, 0, sizeof(si2157_config));
+		si2157_config.fe = dev->dvb->frontend;
+		si2157_config.inversion = true;
+		strlcpy(info.type, "si2157", I2C_NAME_SIZE);
+		info.addr = 0x60;
+		info.platform_data = &si2157_config;
+		request_module("si2157");
+
+		client = i2c_new_device(
+			tuner_i2c,
+			&info);
+		if (client == NULL || client->dev.driver == NULL) {
+			dvb_frontend_detach(dev->dvb->frontend);
+			result = -ENODEV;
+			goto out_free;
+		}
+
+		if (!try_module_get(client->dev.driver->owner)) {
+			i2c_unregister_device(client);
+			dvb_frontend_detach(dev->dvb->frontend);
+			result = -ENODEV;
+			goto out_free;
+		}
+
+		dev->cx231xx_reset_analog_tuner = NULL;
+
+		dev->dvb->i2c_client_tuner = client;
+		break;
+	}
+	case CX231XX_BOARD_HAUPPAUGE_955Q:
+	{
+		struct i2c_client *client;
+		struct i2c_board_info info;
+		struct si2157_config si2157_config;
+
+		memset(&info, 0, sizeof(struct i2c_board_info));
+
+		dev->dvb->frontend = dvb_attach(lgdt3306a_attach,
+			&hauppauge_955q_lgdt3306a_config,
+			tuner_i2c
+			);
+
+		if (dev->dvb->frontend == NULL) {
+			dev_err(dev->dev,
+				"Failed to attach LGDT3306A frontend.\n");
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		dev->dvb->frontend->ops.i2c_gate_ctrl = NULL;
+
+		/* define general-purpose callback pointer */
+		dvb->frontend->callback = cx231xx_tuner_callback;
+
+		/* attach tuner */
+		memset(&si2157_config, 0, sizeof(si2157_config));
+		si2157_config.fe = dev->dvb->frontend;
+		si2157_config.inversion = true;
+		strlcpy(info.type, "si2157", I2C_NAME_SIZE);
+		info.addr = 0x60;
+		info.platform_data = &si2157_config;
+		request_module("si2157");
+
+		client = i2c_new_device(
+			tuner_i2c,
+			&info);
+		if (client == NULL || client->dev.driver == NULL) {
+			dvb_frontend_detach(dev->dvb->frontend);
+			result = -ENODEV;
+			goto out_free;
+		}
+
+		if (!try_module_get(client->dev.driver->owner)) {
+			i2c_unregister_device(client);
+			dvb_frontend_detach(dev->dvb->frontend);
+			result = -ENODEV;
+			goto out_free;
+		}
+
+		dev->cx231xx_reset_analog_tuner = NULL;
+
+		dev->dvb->i2c_client_tuner = client;
+		break;
+	}
+	case CX231XX_BOARD_PV_PLAYTV_USB_HYBRID:
+	case CX231XX_BOARD_KWORLD_UB430_USB_HYBRID:
+
+		dev_info(dev->dev,
+			 "%s: looking for demod on i2c bus: %d\n",
+			 __func__, i2c_adapter_id(tuner_i2c));
+
+		dev->dvb->frontend = dvb_attach(mb86a20s_attach,
+						&pv_mb86a20s_config,
+						demod_i2c);
+
+		if (dev->dvb->frontend == NULL) {
+			dev_err(dev->dev,
+				"Failed to attach mb86a20s demod\n");
+			result = -EINVAL;
+			goto out_free;
+		}
+
+		/* define general-purpose callback pointer */
+		dvb->frontend->callback = cx231xx_tuner_callback;
+
+		dvb_attach(tda18271_attach, dev->dvb->frontend,
+			   0x60, tuner_i2c,
+			   &pv_tda18271_config);
+		break;
+
+	default:
+		dev_err(dev->dev,
+			"%s/2: The frontend of your DVB/ATSC card isn't supported yet\n",
+			dev->name);
+		break;
+	}
+	if (NULL == dvb->frontend) {
+		dev_err(dev->dev,
+		       "%s/2: frontend initialization failed\n", dev->name);
+		result = -EINVAL;
+		goto out_free;
+	}
+
+	/* register everything */
+	result = register_dvb(dvb, THIS_MODULE, dev, dev->dev);
+
+	if (result < 0)
+		goto out_free;
+
+
+	dev_info(dev->dev, "Successfully loaded cx231xx-dvb\n");
+
+ret:
+	cx231xx_set_mode(dev, CX231XX_SUSPEND);
+	mutex_unlock(&dev->lock);
+	return result;
+
+out_free:
+	kfree(dvb);
+	dev->dvb = NULL;
+	goto ret;
+}
+
+static int dvb_fini(struct cx231xx *dev)
+{
+	if (!dev->board.has_dvb) {
+		/* This device does not support the extension */
+		return 0;
+	}
+
+	if (dev->dvb) {
+		unregister_dvb(dev->dvb);
+		dev->dvb = NULL;
+	}
+
+	return 0;
+}
+
+static struct cx231xx_ops dvb_ops = {
+	.id = CX231XX_DVB,
+	.name = "Cx231xx dvb Extension",
+	.init = dvb_init,
+	.fini = dvb_fini,
+};
+
+static int __init cx231xx_dvb_register(void)
+{
+	return cx231xx_register_extension(&dvb_ops);
+}
+
+static void __exit cx231xx_dvb_unregister(void)
+{
+	cx231xx_unregister_extension(&dvb_ops);
+}
+
+module_init(cx231xx_dvb_register);
+module_exit(cx231xx_dvb_unregister);