[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / em28xx / em28xx-dvb.c

/*
 DVB device driver for em28xx

 (c) 2008 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>

 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/usb.h>

#include "em28xx.h"
#include <media/v4l2-common.h>
#include <media/videobuf-vmalloc.h>
#include <media/tuner.h>
#include "tuner-simple.h"

#include "lgdt330x.h"
#include "zl10353.h"
#include "s5h1409.h"
#include "mt352.h"
#include "mt352_priv.h" /* FIXME */
#include "tda1002x.h"

MODULE_DESCRIPTION("driver for em28xx based DVB cards");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
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 EM28XX_DVB_NUM_BUFS 5
#define EM28XX_DVB_MAX_PACKETS 64

struct em28xx_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 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 dvb_isoc_copy(struct em28xx *dev, struct urb *urb)
{
	int i;

	if (!dev)
		return 0;

	if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
		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 int start_streaming(struct em28xx_dvb *dvb)
{
	int rc;
	struct em28xx *dev = dvb->adapter.priv;
	int max_dvb_packet_size;

	usb_set_interface(dev->udev, 0, 1);
	rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
	if (rc < 0)
		return rc;

	max_dvb_packet_size = em28xx_isoc_dvb_max_packetsize(dev);

	return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
				EM28XX_DVB_NUM_BUFS, max_dvb_packet_size,
				dvb_isoc_copy);
}

static int stop_streaming(struct em28xx_dvb *dvb)
{
	struct em28xx *dev = dvb->adapter.priv;

	em28xx_uninit_isoc(dev);

	em28xx_set_mode(dev, EM28XX_SUSPEND);

	return 0;
}

static int 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 = 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 em28xx_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 em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
{
	struct em28xx *dev = fe->dvb->priv;

	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 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 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,
};

#ifdef EM28XX_DRX397XD_SUPPORT
/* [TODO] djh - not sure yet what the device config needs to contain */
static struct drx397xD_config em28xx_drx397xD_with_xc3028 = {
	.demod_address = (0xe0 >> 1),
};
#endif

static int 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 = mt352_terratec_xs_init,
};

static struct tda10023_config em28xx_tda10023_config = {
	.demod_address = 0x0c,
	.invert = 1,
};

/* ------------------------------------------------------------------ */

static int attach_xc3028(u8 addr, struct em28xx *dev)
{
	struct dvb_frontend *fe;
	struct xc2028_config cfg;

	memset(&cfg, 0, sizeof(cfg));
	cfg.i2c_adap  = &dev->i2c_adap;
	cfg.i2c_addr  = addr;

	if (!dev->dvb->frontend) {
		printk(KERN_ERR "%s/2: dvb frontend not attached. "
				"Can't attach xc3028\n",
		       dev->name);
		return -EINVAL;
	}

	fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
	if (!fe) {
		printk(KERN_ERR "%s/2: xc3028 attach failed\n",
		       dev->name);
		dvb_frontend_detach(dev->dvb->frontend);
		dev->dvb->frontend = NULL;
		return -EINVAL;
	}

	printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);

	return 0;
}

/* ------------------------------------------------------------------ */

static int 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->frontend->ops.ts_bus_ctrl = em28xx_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 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);
	dvb_unregister_frontend(dvb->frontend);
	dvb_frontend_detach(dvb->frontend);
	dvb_unregister_adapter(&dvb->adapter);
}


static int dvb_init(struct em28xx *dev)
{
	int result = 0;
	struct em28xx_dvb *dvb;

	if (!dev->board.has_dvb) {
		/* This device does not support the extension */
		return 0;
	}

	dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);

	if (dvb == NULL) {
		printk(KERN_INFO "em28xx_dvb: memory allocation failed\n");
		return -ENOMEM;
	}
	dev->dvb = dvb;

	em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
	/* init frontend */
	switch (dev->model) {
	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->frontend = dvb_attach(lgdt330x_attach,
					   &em2880_lgdt3303_dev,
					   &dev->i2c_adap);
		if (attach_xc3028(0x61, dev) < 0) {
			result = -EINVAL;
			goto out_free;
		}
		break;
	case EM2880_BOARD_KWORLD_DVB_310U:
		dvb->frontend = dvb_attach(zl10353_attach,
					   &em28xx_zl10353_with_xc3028,
					   &dev->i2c_adap);
		if (attach_xc3028(0x61, dev) < 0) {
			result = -EINVAL;
			goto out_free;
		}
		break;
	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
	case EM2880_BOARD_EMPIRE_DUAL_TV:
		dvb->frontend = dvb_attach(zl10353_attach,
					   &em28xx_zl10353_xc3028_no_i2c_gate,
					   &dev->i2c_adap);
		if (attach_xc3028(0x61, dev) < 0) {
			result = -EINVAL;
			goto out_free;
		}
		break;
	case EM2880_BOARD_TERRATEC_HYBRID_XS:
	case EM2881_BOARD_PINNACLE_HYBRID_PRO:
		dvb->frontend = dvb_attach(zl10353_attach,
					   &em28xx_zl10353_xc3028_no_i2c_gate,
					   &dev->i2c_adap);
		if (dvb->frontend == NULL) {
			/* This board could have either a zl10353 or a mt352.
			   If the chip id isn't for zl10353, try mt352 */
			dvb->frontend = dvb_attach(mt352_attach,
						   &terratec_xs_mt352_cfg,
						   &dev->i2c_adap);
		}

		if (attach_xc3028(0x61, dev) < 0) {
			result = -EINVAL;
			goto out_free;
		}
		break;
	case EM2883_BOARD_KWORLD_HYBRID_330U:
	case EM2882_BOARD_EVGA_INDTUBE:
		dvb->frontend = dvb_attach(s5h1409_attach,
					   &em28xx_s5h1409_with_xc3028,
					   &dev->i2c_adap);
		if (attach_xc3028(0x61, dev) < 0) {
			result = -EINVAL;
			goto out_free;
		}
		break;
	case EM2882_BOARD_KWORLD_ATSC_315U:
		dvb->frontend = dvb_attach(lgdt330x_attach,
					   &em2880_lgdt3303_dev,
					   &dev->i2c_adap);
		if (dvb->frontend != NULL) {
			if (!dvb_attach(simple_tuner_attach, dvb->frontend,
				&dev->i2c_adap, 0x61, TUNER_THOMSON_DTT761X)) {
				result = -EINVAL;
				goto out_free;
			}
		}
		break;
	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
#ifdef EM28XX_DRX397XD_SUPPORT
		/* We don't have the config structure properly populated, so
		   this is commented out for now */
		dvb->frontend = dvb_attach(drx397xD_attach,
					   &em28xx_drx397xD_with_xc3028,
					   &dev->i2c_adap);
		if (attach_xc3028(0x61, dev) < 0) {
			result = -EINVAL;
			goto out_free;
		}
		break;
#endif
	case EM2870_BOARD_REDDO_DVB_C_USB_BOX:
		/* Philips CU1216L NIM (Philips TDA10023 + Infineon TUA6034) */
		dvb->frontend = dvb_attach(tda10023_attach,
			&em28xx_tda10023_config,
			&dev->i2c_adap, 0x48);
		if (dvb->frontend) {
			if (!dvb_attach(simple_tuner_attach, dvb->frontend,
				&dev->i2c_adap, 0x60, TUNER_PHILIPS_CU1216L)) {
				result = -EINVAL;
				goto out_free;
			}
		}
		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;
	}
	/* define general-purpose callback pointer */
	dvb->frontend->callback = em28xx_tuner_callback;

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

	if (result < 0)
		goto out_free;

	em28xx_set_mode(dev, EM28XX_SUSPEND);
	printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
	return 0;

out_free:
	em28xx_set_mode(dev, EM28XX_SUSPEND);
	kfree(dvb);
	dev->dvb = NULL;
	return result;
}

static int dvb_fini(struct em28xx *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 em28xx_ops dvb_ops = {
	.id   = EM28XX_DVB,
	.name = "Em28xx dvb Extension",
	.init = dvb_init,
	.fini = dvb_fini,
};

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);
Commit	Line	Data
3aefb79a MCC	1	/*
	2	DVB device driver for em28xx
	3
	4	(c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org>
	5
bdfbf952 DH	6	(c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
bdfbf952 DH	7	- Fixes for the driver to properly work with HVR-950
4fd305b2	8	- Fixes for the driver to properly work with Pinnacle PCTV HD Pro Stick
e14b3658	9	- Fixes for the driver to properly work with AMD ATI TV Wonder HD 600
bdfbf952	10
3421b778 AT	11	(c) 2008 Aidan Thornton <makosoft@googlemail.com>
	12
	13	Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
3aefb79a MCC	14	(c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
	15	(c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
	16
	17	This program is free software; you can redistribute it and/or modify
	18	it under the terms of the GNU General Public License as published by
	19	the Free Software Foundation; either version 2 of the License.
	20	*/
	21
	22	#include <linux/kernel.h>
	23	#include <linux/usb.h>
	24
	25	#include "em28xx.h"
	26	#include <media/v4l2-common.h>
	27	#include <media/videobuf-vmalloc.h>
d7de5d8f FM	28	#include <media/tuner.h>
d7de5d8f FM	29	#include "tuner-simple.h"
3aefb79a MCC	30
3aefb79a MCC	31	#include "lgdt330x.h"
7e6388a1	32	#include "zl10353.h"
6e7b9ea0	33	#include "s5h1409.h"
4fb202a8 DH	34	#include "mt352.h"
4fb202a8 DH	35	#include "mt352_priv.h" /* FIXME */
285eb1a4	36	#include "tda1002x.h"
3aefb79a MCC	37
	38	MODULE_DESCRIPTION("driver for em28xx based DVB cards");
	39	MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
	40	MODULE_LICENSE("GPL");
	41
	42	static unsigned int debug;
	43	module_param(debug, int, 0644);
	44	MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
	45
	46	DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
	47
	48	#define dprintk(level, fmt, arg...) do { \
	49	if (debug >= level) \
3421b778	50	printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
3aefb79a MCC	51	} while (0)
3aefb79a MCC	52
3421b778	53	#define EM28XX_DVB_NUM_BUFS 5
3421b778 AT	54	#define EM28XX_DVB_MAX_PACKETS 64
	55
	56	struct em28xx_dvb {
	57	struct dvb_frontend *frontend;
	58
	59	/* feed count management */
	60	struct mutex lock;
	61	int nfeeds;
	62
	63	/* general boilerplate stuff */
	64	struct dvb_adapter adapter;
	65	struct dvb_demux demux;
	66	struct dmxdev dmxdev;
	67	struct dmx_frontend fe_hw;
	68	struct dmx_frontend fe_mem;
	69	struct dvb_net net;
	70	};
	71
	72
	73	static inline void print_err_status(struct em28xx *dev,
	74	int packet, int status)
3aefb79a	75	{
3421b778	76	char *errmsg = "Unknown";
3aefb79a	77
3421b778 AT	78	switch (status) {
	79	case -ENOENT:
	80	errmsg = "unlinked synchronuously";
	81	break;
	82	case -ECONNRESET:
	83	errmsg = "unlinked asynchronuously";
	84	break;
	85	case -ENOSR:
	86	errmsg = "Buffer error (overrun)";
	87	break;
	88	case -EPIPE:
	89	errmsg = "Stalled (device not responding)";
	90	break;
	91	case -EOVERFLOW:
	92	errmsg = "Babble (bad cable?)";
	93	break;
	94	case -EPROTO:
	95	errmsg = "Bit-stuff error (bad cable?)";
	96	break;
	97	case -EILSEQ:
	98	errmsg = "CRC/Timeout (could be anything)";
	99	break;
	100	case -ETIME:
	101	errmsg = "Device does not respond";
	102	break;
	103	}
	104	if (packet < 0) {
	105	dprintk(1, "URB status %d [%s].\n", status, errmsg);
	106	} else {
6ea54d93 DSL	107	dprintk(1, "URB packet %d, status %d [%s].\n",
6ea54d93 DSL	108	packet, status, errmsg);
3421b778 AT	109	}
3421b778 AT	110	}
3aefb79a	111
3421b778 AT	112	static inline int dvb_isoc_copy(struct em28xx dev, struct urb urb)
	113	{
	114	int i;
3aefb79a	115
3421b778 AT	116	if (!dev)
3421b778 AT	117	return 0;
3aefb79a	118
3421b778 AT	119	if ((dev->state & DEV_DISCONNECTED) \|\| (dev->state & DEV_MISCONFIGURED))
	120	return 0;
	121
	122	if (urb->status < 0) {
	123	print_err_status(dev, -1, urb->status);
	124	if (urb->status == -ENOENT)
	125	return 0;
	126	}
	127
	128	for (i = 0; i < urb->number_of_packets; i++) {
	129	int status = urb->iso_frame_desc[i].status;
	130
	131	if (status < 0) {
	132	print_err_status(dev, i, status);
	133	if (urb->iso_frame_desc[i].status != -EPROTO)
	134	continue;
	135	}
	136
	137	dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
	138	urb->iso_frame_desc[i].offset,
	139	urb->iso_frame_desc[i].actual_length);
	140	}
	141
	142	return 0;
	143	}
	144
6ea54d93 DSL	145	static int start_streaming(struct em28xx_dvb *dvb)
6ea54d93 DSL	146	{
c67ec53f	147	int rc;
3421b778	148	struct em28xx *dev = dvb->adapter.priv;
d18e2fda	149	int max_dvb_packet_size;
3421b778 AT	150
3421b778 AT	151	usb_set_interface(dev->udev, 0, 1);
c67ec53f MCC	152	rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
	153	if (rc < 0)
	154	return rc;
3421b778	155
d18e2fda DH	156	max_dvb_packet_size = em28xx_isoc_dvb_max_packetsize(dev);
d18e2fda DH	157
3421b778	158	return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
d18e2fda	159	EM28XX_DVB_NUM_BUFS, max_dvb_packet_size,
c67ec53f	160	dvb_isoc_copy);
3421b778 AT	161	}
3421b778 AT	162
6ea54d93 DSL	163	static int stop_streaming(struct em28xx_dvb *dvb)
6ea54d93 DSL	164	{
3421b778 AT	165	struct em28xx *dev = dvb->adapter.priv;
	166
	167	em28xx_uninit_isoc(dev);
c67ec53f	168
2fe3e2ee	169	em28xx_set_mode(dev, EM28XX_SUSPEND);
c67ec53f	170
3aefb79a MCC	171	return 0;
	172	}
	173
3421b778 AT	174	static int start_feed(struct dvb_demux_feed *feed)
	175	{
	176	struct dvb_demux *demux = feed->demux;
	177	struct em28xx_dvb *dvb = demux->priv;
	178	int rc, ret;
	179
	180	if (!demux->dmx.frontend)
	181	return -EINVAL;
	182
	183	mutex_lock(&dvb->lock);
	184	dvb->nfeeds++;
	185	rc = dvb->nfeeds;
	186
	187	if (dvb->nfeeds == 1) {
	188	ret = start_streaming(dvb);
6ea54d93 DSL	189	if (ret < 0)
6ea54d93 DSL	190	rc = ret;
3421b778 AT	191	}
	192
	193	mutex_unlock(&dvb->lock);
	194	return rc;
	195	}
	196
	197	static int stop_feed(struct dvb_demux_feed *feed)
	198	{
	199	struct dvb_demux *demux = feed->demux;
	200	struct em28xx_dvb *dvb = demux->priv;
	201	int err = 0;
	202
	203	mutex_lock(&dvb->lock);
	204	dvb->nfeeds--;
6ea54d93 DSL	205
6ea54d93 DSL	206	if (0 == dvb->nfeeds)
3421b778	207	err = stop_streaming(dvb);
6ea54d93	208
3421b778 AT	209	mutex_unlock(&dvb->lock);
	210	return err;
	211	}
	212
	213
e3569abc MCC	214
	215	/* ------------------------------------------------------------------ */
	216	static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
	217	{
	218	struct em28xx *dev = fe->dvb->priv;
	219
	220	if (acquire)
	221	return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
	222	else
2fe3e2ee	223	return em28xx_set_mode(dev, EM28XX_SUSPEND);
e3569abc MCC	224	}
e3569abc MCC	225
3aefb79a MCC	226	/* ------------------------------------------------------------------ */
3aefb79a MCC	227
227ad4ab MCC	228	static struct lgdt330x_config em2880_lgdt3303_dev = {
	229	.demod_address = 0x0e,
	230	.demod_chip = LGDT3303,
	231	};
3aefb79a	232
7e6388a1 AT	233	static struct zl10353_config em28xx_zl10353_with_xc3028 = {
	234	.demod_address = (0x1e >> 1),
	235	.no_tuner = 1,
	236	.parallel_ts = 1,
	237	.if2 = 45600,
	238	};
	239
6e7b9ea0 RK	240	static struct s5h1409_config em28xx_s5h1409_with_xc3028 = {
	241	.demod_address = 0x32 >> 1,
	242	.output_mode = S5H1409_PARALLEL_OUTPUT,
	243	.gpio = S5H1409_GPIO_OFF,
	244	.inversion = S5H1409_INVERSION_OFF,
	245	.status_mode = S5H1409_DEMODLOCKING,
	246	.mpeg_timing = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK
	247	};
	248
a84f79ae	249	static struct zl10353_config em28xx_zl10353_xc3028_no_i2c_gate = {
f797608c DH	250	.demod_address = (0x1e >> 1),
	251	.no_tuner = 1,
	252	.disable_i2c_gate_ctrl = 1,
	253	.parallel_ts = 1,
	254	.if2 = 45600,
	255	};
	256
17d9d558 DH	257	#ifdef EM28XX_DRX397XD_SUPPORT
	258	/* [TODO] djh - not sure yet what the device config needs to contain */
	259	static struct drx397xD_config em28xx_drx397xD_with_xc3028 = {
	260	.demod_address = (0xe0 >> 1),
	261	};
	262	#endif
	263
4fb202a8 DH	264	static int mt352_terratec_xs_init(struct dvb_frontend *fe)
	265	{
	266	/* Values extracted from a USB trace of the Terratec Windows driver */
	267	static u8 clock_config[] = { CLOCK_CTL, 0x38, 0x2c };
	268	static u8 reset[] = { RESET, 0x80 };
	269	static u8 adc_ctl_1_cfg[] = { ADC_CTL_1, 0x40 };
	270	static u8 agc_cfg[] = { AGC_TARGET, 0x28, 0xa0 };
	271	static u8 input_freq_cfg[] = { INPUT_FREQ_1, 0x31, 0xb8 };
	272	static u8 rs_err_cfg[] = { RS_ERR_PER_1, 0x00, 0x4d };
	273	static u8 capt_range_cfg[] = { CAPT_RANGE, 0x32 };
	274	static u8 trl_nom_cfg[] = { TRL_NOMINAL_RATE_1, 0x64, 0x00 };
	275	static u8 tps_given_cfg[] = { TPS_GIVEN_1, 0x40, 0x80, 0x50 };
ff69786b	276	static u8 tuner_go[] = { TUNER_GO, 0x01};
4fb202a8 DH	277
	278	mt352_write(fe, clock_config, sizeof(clock_config));
	279	udelay(200);
	280	mt352_write(fe, reset, sizeof(reset));
	281	mt352_write(fe, adc_ctl_1_cfg, sizeof(adc_ctl_1_cfg));
	282	mt352_write(fe, agc_cfg, sizeof(agc_cfg));
	283	mt352_write(fe, input_freq_cfg, sizeof(input_freq_cfg));
	284	mt352_write(fe, rs_err_cfg, sizeof(rs_err_cfg));
	285	mt352_write(fe, capt_range_cfg, sizeof(capt_range_cfg));
	286	mt352_write(fe, trl_nom_cfg, sizeof(trl_nom_cfg));
	287	mt352_write(fe, tps_given_cfg, sizeof(tps_given_cfg));
	288	mt352_write(fe, tuner_go, sizeof(tuner_go));
	289	return 0;
	290	}
	291
	292	static struct mt352_config terratec_xs_mt352_cfg = {
	293	.demod_address = (0x1e >> 1),
	294	.no_tuner = 1,
	295	.if2 = 45600,
	296	.demod_init = mt352_terratec_xs_init,
	297	};
	298
285eb1a4 AP	299	static struct tda10023_config em28xx_tda10023_config = {
	300	.demod_address = 0x0c,
	301	.invert = 1,
	302	};
	303
3aefb79a MCC	304	/* ------------------------------------------------------------------ */
	305
	306	static int attach_xc3028(u8 addr, struct em28xx *dev)
	307	{
	308	struct dvb_frontend *fe;
3ca9c093 MCC	309	struct xc2028_config cfg;
3ca9c093 MCC	310
6ea54d93	311	memset(&cfg, 0, sizeof(cfg));
3ca9c093 MCC	312	cfg.i2c_adap = &dev->i2c_adap;
3ca9c093 MCC	313	cfg.i2c_addr = addr;
3ca9c093	314
3421b778	315	if (!dev->dvb->frontend) {
3aefb79a MCC	316	printk(KERN_ERR "%s/2: dvb frontend not attached. "
	317	"Can't attach xc3028\n",
	318	dev->name);
	319	return -EINVAL;
	320	}
	321
3421b778	322	fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
3aefb79a MCC	323	if (!fe) {
	324	printk(KERN_ERR "%s/2: xc3028 attach failed\n",
	325	dev->name);
3421b778	326	dvb_frontend_detach(dev->dvb->frontend);
3421b778	327	dev->dvb->frontend = NULL;
3aefb79a MCC	328	return -EINVAL;
	329	}
	330
	331	printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
	332
	333	return 0;
	334	}
	335
3421b778 AT	336	/* ------------------------------------------------------------------ */
3421b778 AT	337
d45b9b8a	338	static int register_dvb(struct em28xx_dvb *dvb,
3421b778 AT	339	struct module *module,
	340	struct em28xx *dev,
	341	struct device *device)
3aefb79a	342	{
3421b778	343	int result;
3aefb79a	344
3421b778	345	mutex_init(&dvb->lock);
3aefb79a	346
3421b778 AT	347	/* register adapter */
	348	result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
	349	adapter_nr);
	350	if (result < 0) {
	351	printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
	352	dev->name, result);
	353	goto fail_adapter;
	354	}
e3569abc MCC	355
	356	/* Ensure all frontends negotiate bus access */
	357	dvb->frontend->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
	358
3421b778 AT	359	dvb->adapter.priv = dev;
	360
	361	/* register frontend */
	362	result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
	363	if (result < 0) {
	364	printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
	365	dev->name, result);
	366	goto fail_frontend;
	367	}
	368
	369	/* register demux stuff */
	370	dvb->demux.dmx.capabilities =
	371	DMX_TS_FILTERING \| DMX_SECTION_FILTERING \|
	372	DMX_MEMORY_BASED_FILTERING;
	373	dvb->demux.priv = dvb;
	374	dvb->demux.filternum = 256;
	375	dvb->demux.feednum = 256;
	376	dvb->demux.start_feed = start_feed;
	377	dvb->demux.stop_feed = stop_feed;
e3569abc	378
3421b778 AT	379	result = dvb_dmx_init(&dvb->demux);
	380	if (result < 0) {
	381	printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
	382	dev->name, result);
	383	goto fail_dmx;
	384	}
	385
	386	dvb->dmxdev.filternum = 256;
	387	dvb->dmxdev.demux = &dvb->demux.dmx;
	388	dvb->dmxdev.capabilities = 0;
	389	result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
	390	if (result < 0) {
	391	printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
	392	dev->name, result);
	393	goto fail_dmxdev;
	394	}
52284c3e	395
3421b778 AT	396	dvb->fe_hw.source = DMX_FRONTEND_0;
	397	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	398	if (result < 0) {
	399	printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
	400	dev->name, result);
	401	goto fail_fe_hw;
	402	}
	403
	404	dvb->fe_mem.source = DMX_MEMORY_FE;
	405	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	406	if (result < 0) {
	407	printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
	408	dev->name, result);
	409	goto fail_fe_mem;
	410	}
	411
	412	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	413	if (result < 0) {
	414	printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
	415	dev->name, result);
	416	goto fail_fe_conn;
	417	}
	418
	419	/* register network adapter */
	420	dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
	421	return 0;
	422
	423	fail_fe_conn:
	424	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	425	fail_fe_mem:
	426	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	427	fail_fe_hw:
	428	dvb_dmxdev_release(&dvb->dmxdev);
	429	fail_dmxdev:
	430	dvb_dmx_release(&dvb->demux);
	431	fail_dmx:
	432	dvb_unregister_frontend(dvb->frontend);
	433	fail_frontend:
	434	dvb_frontend_detach(dvb->frontend);
	435	dvb_unregister_adapter(&dvb->adapter);
	436	fail_adapter:
	437	return result;
	438	}
	439
	440	static void unregister_dvb(struct em28xx_dvb *dvb)
	441	{
	442	dvb_net_release(&dvb->net);
	443	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	444	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	445	dvb_dmxdev_release(&dvb->dmxdev);
	446	dvb_dmx_release(&dvb->demux);
	447	dvb_unregister_frontend(dvb->frontend);
	448	dvb_frontend_detach(dvb->frontend);
	449	dvb_unregister_adapter(&dvb->adapter);
	450	}
	451
	452
	453	static int dvb_init(struct em28xx *dev)
	454	{
	455	int result = 0;
	456	struct em28xx_dvb *dvb;
	457
505b6d0b	458	if (!dev->board.has_dvb) {
df619181 DH	459	/* This device does not support the extension */
	460	return 0;
	461	}
	462
3421b778	463	dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
6ea54d93 DSL	464
	465	if (dvb == NULL) {
	466	printk(KERN_INFO "em28xx_dvb: memory allocation failed\n");
3421b778 AT	467	return -ENOMEM;
	468	}
	469	dev->dvb = dvb;
3aefb79a	470
c67ec53f	471	em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
3aefb79a MCC	472	/* init frontend */
3aefb79a MCC	473	switch (dev->model) {
f89bc329	474	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
10ac6603	475	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
4fd305b2	476	case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
e14b3658	477	case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
3421b778 AT	478	dvb->frontend = dvb_attach(lgdt330x_attach,
	479	&em2880_lgdt3303_dev,
	480	&dev->i2c_adap);
	481	if (attach_xc3028(0x61, dev) < 0) {
	482	result = -EINVAL;
	483	goto out_free;
	484	}
227ad4ab	485	break;
46510b56	486	case EM2880_BOARD_KWORLD_DVB_310U:
3421b778 AT	487	dvb->frontend = dvb_attach(zl10353_attach,
	488	&em28xx_zl10353_with_xc3028,
	489	&dev->i2c_adap);
	490	if (attach_xc3028(0x61, dev) < 0) {
	491	result = -EINVAL;
	492	goto out_free;
	493	}
7e6388a1	494	break;
a84f79ae	495	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
01a5fd6f	496	case EM2880_BOARD_EMPIRE_DUAL_TV:
a84f79ae DH	497	dvb->frontend = dvb_attach(zl10353_attach,
	498	&em28xx_zl10353_xc3028_no_i2c_gate,
	499	&dev->i2c_adap);
	500	if (attach_xc3028(0x61, dev) < 0) {
	501	result = -EINVAL;
	502	goto out_free;
	503	}
	504	break;
f797608c	505	case EM2880_BOARD_TERRATEC_HYBRID_XS:
d5b3ba9c	506	case EM2881_BOARD_PINNACLE_HYBRID_PRO:
f797608c	507	dvb->frontend = dvb_attach(zl10353_attach,
a84f79ae	508	&em28xx_zl10353_xc3028_no_i2c_gate,
f797608c DH	509	&dev->i2c_adap);
	510	if (dvb->frontend == NULL) {
	511	/* This board could have either a zl10353 or a mt352.
	512	If the chip id isn't for zl10353, try mt352 */
4fb202a8 DH	513	dvb->frontend = dvb_attach(mt352_attach,
	514	&terratec_xs_mt352_cfg,
	515	&dev->i2c_adap);
f797608c	516	}
4fb202a8	517
f797608c DH	518	if (attach_xc3028(0x61, dev) < 0) {
	519	result = -EINVAL;
	520	goto out_free;
	521	}
	522	break;
6e7b9ea0	523	case EM2883_BOARD_KWORLD_HYBRID_330U:
19859229	524	case EM2882_BOARD_EVGA_INDTUBE:
6e7b9ea0 RK	525	dvb->frontend = dvb_attach(s5h1409_attach,
	526	&em28xx_s5h1409_with_xc3028,
	527	&dev->i2c_adap);
	528	if (attach_xc3028(0x61, dev) < 0) {
	529	result = -EINVAL;
	530	goto out_free;
	531	}
	532	break;
d7de5d8f FM	533	case EM2882_BOARD_KWORLD_ATSC_315U:
	534	dvb->frontend = dvb_attach(lgdt330x_attach,
	535	&em2880_lgdt3303_dev,
	536	&dev->i2c_adap);
	537	if (dvb->frontend != NULL) {
	538	if (!dvb_attach(simple_tuner_attach, dvb->frontend,
	539	&dev->i2c_adap, 0x61, TUNER_THOMSON_DTT761X)) {
	540	result = -EINVAL;
	541	goto out_free;
	542	}
	543	}
	544	break;
17d9d558 DH	545	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
	546	#ifdef EM28XX_DRX397XD_SUPPORT
	547	/* We don't have the config structure properly populated, so
	548	this is commented out for now */
	549	dvb->frontend = dvb_attach(drx397xD_attach,
	550	&em28xx_drx397xD_with_xc3028,
	551	&dev->i2c_adap);
	552	if (attach_xc3028(0x61, dev) < 0) {
	553	result = -EINVAL;
	554	goto out_free;
	555	}
	556	break;
	557	#endif
285eb1a4 AP	558	case EM2870_BOARD_REDDO_DVB_C_USB_BOX:
	559	/* Philips CU1216L NIM (Philips TDA10023 + Infineon TUA6034) */
	560	dvb->frontend = dvb_attach(tda10023_attach,
	561	&em28xx_tda10023_config,
	562	&dev->i2c_adap, 0x48);
	563	if (dvb->frontend) {
	564	if (!dvb_attach(simple_tuner_attach, dvb->frontend,
	565	&dev->i2c_adap, 0x60, TUNER_PHILIPS_CU1216L)) {
	566	result = -EINVAL;
	567	goto out_free;
	568	}
	569	}
	570	break;
3aefb79a MCC	571	default:
	572	printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
	573	" isn't supported yet\n",
	574	dev->name);
	575	break;
	576	}
3421b778	577	if (NULL == dvb->frontend) {
3aefb79a MCC	578	printk(KERN_ERR
	579	"%s/2: frontend initialization failed\n",
	580	dev->name);
3421b778 AT	581	result = -EINVAL;
3421b778 AT	582	goto out_free;
3aefb79a	583	}
d7cba043 MK	584	/* define general-purpose callback pointer */
d7cba043 MK	585	dvb->frontend->callback = em28xx_tuner_callback;
3aefb79a MCC	586
3aefb79a MCC	587	/* register everything */
3421b778 AT	588	result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
3421b778 AT	589
6ea54d93	590	if (result < 0)
3421b778	591	goto out_free;
3421b778	592
2fe3e2ee	593	em28xx_set_mode(dev, EM28XX_SUSPEND);
102a0b08	594	printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
3421b778 AT	595	return 0;
	596
	597	out_free:
2fe3e2ee	598	em28xx_set_mode(dev, EM28XX_SUSPEND);
3421b778 AT	599	kfree(dvb);
	600	dev->dvb = NULL;
	601	return result;
3aefb79a MCC	602	}
	603
	604	static int dvb_fini(struct em28xx *dev)
	605	{
505b6d0b	606	if (!dev->board.has_dvb) {
df619181 DH	607	/* This device does not support the extension */
	608	return 0;
	609	}
	610
3421b778 AT	611	if (dev->dvb) {
	612	unregister_dvb(dev->dvb);
	613	dev->dvb = NULL;
	614	}
3aefb79a MCC	615
	616	return 0;
	617	}
	618
	619	static struct em28xx_ops dvb_ops = {
	620	.id = EM28XX_DVB,
	621	.name = "Em28xx dvb Extension",
	622	.init = dvb_init,
	623	.fini = dvb_fini,
	624	};
	625
	626	static int __init em28xx_dvb_register(void)
	627	{
	628	return em28xx_register_extension(&dvb_ops);
	629	}
	630
	631	static void __exit em28xx_dvb_unregister(void)
	632	{
	633	em28xx_unregister_extension(&dvb_ops);
	634	}
	635
	636	module_init(em28xx_dvb_register);
	637	module_exit(em28xx_dvb_unregister);