drivers/media/usb/cx231xx/cx231xx-dvb.c - linux - Git at Google

 /*
  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 <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/usb.h>

 #include "cx231xx.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 "mb86a20s.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 dprintk(level, fmt, arg...) do {			\
 if (debug >= level) 						\
 	printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg);	\
 } while (0)

 #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;
 };

 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 = 3300, .agc_mode = 3, .std = 4,
 		      .if_lvl = 7, .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 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) {
 		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 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) {
 		cx231xx_info("DVB transfer mode is ISO.\n");
 		mutex_lock(&dev->i2c_lock);
 		cx231xx_enable_i2c_port_3(dev, false);
 		cx231xx_set_alt_setting(dev, INDEX_TS1, 4);
 		cx231xx_enable_i2c_port_3(dev, true);
 		mutex_unlock(&dev->i2c_lock);
 		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 {
 		cx231xx_info("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 = &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap;
 	cfg.i2c_addr = addr;

 	if (!dev->dvb->frontend) {
 		printk(KERN_ERR "%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) {
 		printk(KERN_ERR "%s/2: xc5000 attach failed\n", dev->name);
 		dvb_frontend_detach(dev->dvb->frontend);
 		dev->dvb->frontend = NULL;
 		return -EINVAL;
 	}

 	printk(KERN_INFO "%s/2: xc5000 attached\n", dev->name);

 	return 0;
 }
 #endif

 int cx231xx_set_analog_freq(struct cx231xx *dev, u32 freq)
 {
 	int status = 0;

 	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 status;
 }

 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) {

 			cx231xx_info("Reloading firmware for XC5000\n");
 			status = dops->init(dev->dvb->frontend);
 			if (status == 0) {
 				dev->xc_fw_load_done = 1;
 				cx231xx_info
 				    ("XC5000 firmware download completed\n");
 			} else {
 				dev->xc_fw_load_done = 0;
 				cx231xx_info
 				    ("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) {
 		printk(KERN_WARNING
 		       "%s: dvb_register_adapter failed (errno = %d)\n",
 		       dev->name, result);
 		goto fail_adapter;
 	}

 	/* 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) {
 		printk(KERN_WARNING
 		       "%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) {
 		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:
 	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)
 {
 	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);
 	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;

 	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) {
 		printk(KERN_INFO "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;

 	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,
 					&dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

 		if (dev->dvb->frontend == NULL) {
 			printk(DRIVER_NAME
 			       ": 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,
 			       &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
 			       &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,
 					       &dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

 		if (dev->dvb->frontend == NULL) {
 			printk(DRIVER_NAME
 			       ": 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,
 			       &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
 			       &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,
 					&dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

 		if (dev->dvb->frontend == NULL) {
 			printk(DRIVER_NAME
 			       ": 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, &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
 			       &cnxt_rde253s_tunerconfig)) {
 			result = -EINVAL;
 			goto out_free;
 		}
 		break;
 	case CX231XX_BOARD_CNXT_RDU_253S:

 		dev->dvb->frontend = dvb_attach(s5h1411_attach,
 					       &tda18271_s5h1411_config,
 					       &dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

 		if (dev->dvb->frontend == NULL) {
 			printk(DRIVER_NAME
 			       ": 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, &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
 			       &cnxt_rde253s_tunerconfig)) {
 			result = -EINVAL;
 			goto out_free;
 		}
 		break;
 	case CX231XX_BOARD_HAUPPAUGE_EXETER:

 		printk(KERN_INFO "%s: looking for tuner / demod on i2c bus: %d\n",
 		       __func__, i2c_adapter_id(&dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap));

 		dev->dvb->frontend = dvb_attach(lgdt3305_attach,
 						&hcw_lgdt3305_config,
 						&dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap);

 		if (dev->dvb->frontend == NULL) {
 			printk(DRIVER_NAME
 			       ": 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, &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
 			   &hcw_tda18271_config);
 		break;

 	case CX231XX_BOARD_PV_PLAYTV_USB_HYBRID:
 	case CX231XX_BOARD_KWORLD_UB430_USB_HYBRID:

 		printk(KERN_INFO "%s: looking for demod on i2c bus: %d\n",
 		       __func__, i2c_adapter_id(&dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap));

 		dev->dvb->frontend = dvb_attach(mb86a20s_attach,
 						&pv_mb86a20s_config,
 						&dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

 		if (dev->dvb->frontend == NULL) {
 			printk(DRIVER_NAME
 			       ": 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, &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
 			   &pv_tda18271_config);
 		break;

 	default:
 		printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
 		       " isn't supported yet\n", dev->name);
 		break;
 	}
 	if (NULL == dvb->frontend) {
 		printk(KERN_ERR
 		       "%s/2: frontend initialization failed\n", dev->name);
 		result = -EINVAL;
 		goto out_free;
 	}

 	/* register everything */
 	result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);

 	if (result < 0)
 		goto out_free;


 	printk(KERN_INFO "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);
	/*
	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 <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/usb.h>

	#include "cx231xx.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 "mb86a20s.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 dprintk(level, fmt, arg...) do { \
	if (debug >= level) \
	printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
	} while (0)

	#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;
	};

	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 = 3300, .agc_mode = 3, .std = 4,
	.if_lvl = 7, .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 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) {
	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 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) {
	cx231xx_info("DVB transfer mode is ISO.\n");
	mutex_lock(&dev->i2c_lock);
	cx231xx_enable_i2c_port_3(dev, false);
	cx231xx_set_alt_setting(dev, INDEX_TS1, 4);
	cx231xx_enable_i2c_port_3(dev, true);
	mutex_unlock(&dev->i2c_lock);
	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 {
	cx231xx_info("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 = &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap;
	cfg.i2c_addr = addr;

	if (!dev->dvb->frontend) {
	printk(KERN_ERR "%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) {
	printk(KERN_ERR "%s/2: xc5000 attach failed\n", dev->name);
	dvb_frontend_detach(dev->dvb->frontend);
	dev->dvb->frontend = NULL;
	return -EINVAL;
	}

	printk(KERN_INFO "%s/2: xc5000 attached\n", dev->name);

	return 0;
	}
	#endif

	int cx231xx_set_analog_freq(struct cx231xx *dev, u32 freq)
	{
	int status = 0;

	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 status;
	}

	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) {

	cx231xx_info("Reloading firmware for XC5000\n");
	status = dops->init(dev->dvb->frontend);
	if (status == 0) {
	dev->xc_fw_load_done = 1;
	cx231xx_info
	("XC5000 firmware download completed\n");
	} else {
	dev->xc_fw_load_done = 0;
	cx231xx_info
	("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) {
	printk(KERN_WARNING
	"%s: dvb_register_adapter failed (errno = %d)\n",
	dev->name, result);
	goto fail_adapter;
	}

	/* 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) {
	printk(KERN_WARNING
	"%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) {
	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:
	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)
	{
	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);
	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;

	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) {
	printk(KERN_INFO "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;

	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,
	&dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

	if (dev->dvb->frontend == NULL) {
	printk(DRIVER_NAME
	": 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,
	&dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
	&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,
	&dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

	if (dev->dvb->frontend == NULL) {
	printk(DRIVER_NAME
	": 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,
	&dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
	&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,
	&dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

	if (dev->dvb->frontend == NULL) {
	printk(DRIVER_NAME
	": 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, &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
	&cnxt_rde253s_tunerconfig)) {
	result = -EINVAL;
	goto out_free;
	}
	break;
	case CX231XX_BOARD_CNXT_RDU_253S:

	dev->dvb->frontend = dvb_attach(s5h1411_attach,
	&tda18271_s5h1411_config,
	&dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

	if (dev->dvb->frontend == NULL) {
	printk(DRIVER_NAME
	": 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, &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
	&cnxt_rde253s_tunerconfig)) {
	result = -EINVAL;
	goto out_free;
	}
	break;
	case CX231XX_BOARD_HAUPPAUGE_EXETER:

	printk(KERN_INFO "%s: looking for tuner / demod on i2c bus: %d\n",
	__func__, i2c_adapter_id(&dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap));

	dev->dvb->frontend = dvb_attach(lgdt3305_attach,
	&hcw_lgdt3305_config,
	&dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap);

	if (dev->dvb->frontend == NULL) {
	printk(DRIVER_NAME
	": 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, &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
	&hcw_tda18271_config);
	break;

	case CX231XX_BOARD_PV_PLAYTV_USB_HYBRID:
	case CX231XX_BOARD_KWORLD_UB430_USB_HYBRID:

	printk(KERN_INFO "%s: looking for demod on i2c bus: %d\n",
	__func__, i2c_adapter_id(&dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap));

	dev->dvb->frontend = dvb_attach(mb86a20s_attach,
	&pv_mb86a20s_config,
	&dev->i2c_bus[dev->board.demod_i2c_master].i2c_adap);

	if (dev->dvb->frontend == NULL) {
	printk(DRIVER_NAME
	": 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, &dev->i2c_bus[dev->board.tuner_i2c_master].i2c_adap,
	&pv_tda18271_config);
	break;

	default:
	printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
	" isn't supported yet\n", dev->name);
	break;
	}
	if (NULL == dvb->frontend) {
	printk(KERN_ERR
	"%s/2: frontend initialization failed\n", dev->name);
	result = -EINVAL;
	goto out_free;
	}

	/* register everything */
	result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);

	if (result < 0)
	goto out_free;


	printk(KERN_INFO "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);