[net-next-2.6.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/slab.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) {
		em28xx_errdev("/2: dvb frontend not attached. "
				"Can't attach xc3028\n");
		return -EINVAL;
	}

	fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
	if (!fe) {
		em28xx_errdev("/2: xc3028 attach failed\n");
		dvb_frontend_detach(dev->dvb->frontend);
		dev->dvb->frontend = NULL;
		return -EINVAL;
	}

	em28xx_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) {
		em28xx_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 EM2882_BOARD_TERRATEC_HYBRID_XS:
	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 EM2880_BOARD_TERRATEC_HYBRID_XS_FR:
	case EM2881_BOARD_PINNACLE_HYBRID_PRO:
	case EM2882_BOARD_DIKOM_DK300:
		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:
		em28xx_errdev("/2: The frontend of your DVB/ATSC card"
				" isn't supported yet\n");
		break;
	}
	if (NULL == dvb->frontend) {
		em28xx_errdev("/2: frontend initialization failed\n");
		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);
	em28xx_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);
		kfree(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>
5a0e3ad6	23	#include <linux/slab.h>
3aefb79a MCC	24	#include <linux/usb.h>
	25
	26	#include "em28xx.h"
	27	#include <media/v4l2-common.h>
	28	#include <media/videobuf-vmalloc.h>
d7de5d8f FM	29	#include <media/tuner.h>
d7de5d8f FM	30	#include "tuner-simple.h"
3aefb79a MCC	31
3aefb79a MCC	32	#include "lgdt330x.h"
7e6388a1	33	#include "zl10353.h"
6e7b9ea0	34	#include "s5h1409.h"
4fb202a8 DH	35	#include "mt352.h"
4fb202a8 DH	36	#include "mt352_priv.h" /* FIXME */
285eb1a4	37	#include "tda1002x.h"
3aefb79a MCC	38
	39	MODULE_DESCRIPTION("driver for em28xx based DVB cards");
	40	MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
	41	MODULE_LICENSE("GPL");
	42
	43	static unsigned int debug;
	44	module_param(debug, int, 0644);
	45	MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
	46
	47	DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
	48
	49	#define dprintk(level, fmt, arg...) do { \
	50	if (debug >= level) \
3421b778	51	printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
3aefb79a MCC	52	} while (0)
3aefb79a MCC	53
3421b778	54	#define EM28XX_DVB_NUM_BUFS 5
3421b778 AT	55	#define EM28XX_DVB_MAX_PACKETS 64
	56
	57	struct em28xx_dvb {
	58	struct dvb_frontend *frontend;
	59
	60	/* feed count management */
	61	struct mutex lock;
	62	int nfeeds;
	63
	64	/* general boilerplate stuff */
	65	struct dvb_adapter adapter;
	66	struct dvb_demux demux;
	67	struct dmxdev dmxdev;
	68	struct dmx_frontend fe_hw;
	69	struct dmx_frontend fe_mem;
	70	struct dvb_net net;
	71	};
	72
	73
	74	static inline void print_err_status(struct em28xx *dev,
	75	int packet, int status)
3aefb79a	76	{
3421b778	77	char *errmsg = "Unknown";
3aefb79a	78
3421b778 AT	79	switch (status) {
	80	case -ENOENT:
	81	errmsg = "unlinked synchronuously";
	82	break;
	83	case -ECONNRESET:
	84	errmsg = "unlinked asynchronuously";
	85	break;
	86	case -ENOSR:
	87	errmsg = "Buffer error (overrun)";
	88	break;
	89	case -EPIPE:
	90	errmsg = "Stalled (device not responding)";
	91	break;
	92	case -EOVERFLOW:
	93	errmsg = "Babble (bad cable?)";
	94	break;
	95	case -EPROTO:
	96	errmsg = "Bit-stuff error (bad cable?)";
	97	break;
	98	case -EILSEQ:
	99	errmsg = "CRC/Timeout (could be anything)";
	100	break;
	101	case -ETIME:
	102	errmsg = "Device does not respond";
	103	break;
	104	}
	105	if (packet < 0) {
	106	dprintk(1, "URB status %d [%s].\n", status, errmsg);
	107	} else {
6ea54d93 DSL	108	dprintk(1, "URB packet %d, status %d [%s].\n",
6ea54d93 DSL	109	packet, status, errmsg);
3421b778 AT	110	}
3421b778 AT	111	}
3aefb79a	112
3421b778 AT	113	static inline int dvb_isoc_copy(struct em28xx dev, struct urb urb)
	114	{
	115	int i;
3aefb79a	116
3421b778 AT	117	if (!dev)
3421b778 AT	118	return 0;
3aefb79a	119
3421b778 AT	120	if ((dev->state & DEV_DISCONNECTED) \|\| (dev->state & DEV_MISCONFIGURED))
	121	return 0;
	122
	123	if (urb->status < 0) {
	124	print_err_status(dev, -1, urb->status);
	125	if (urb->status == -ENOENT)
	126	return 0;
	127	}
	128
	129	for (i = 0; i < urb->number_of_packets; i++) {
	130	int status = urb->iso_frame_desc[i].status;
	131
	132	if (status < 0) {
	133	print_err_status(dev, i, status);
	134	if (urb->iso_frame_desc[i].status != -EPROTO)
	135	continue;
	136	}
	137
	138	dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
	139	urb->iso_frame_desc[i].offset,
	140	urb->iso_frame_desc[i].actual_length);
	141	}
	142
	143	return 0;
	144	}
	145
6ea54d93 DSL	146	static int start_streaming(struct em28xx_dvb *dvb)
6ea54d93 DSL	147	{
c67ec53f	148	int rc;
3421b778	149	struct em28xx *dev = dvb->adapter.priv;
d18e2fda	150	int max_dvb_packet_size;
3421b778 AT	151
3421b778 AT	152	usb_set_interface(dev->udev, 0, 1);
c67ec53f MCC	153	rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
	154	if (rc < 0)
	155	return rc;
3421b778	156
d18e2fda DH	157	max_dvb_packet_size = em28xx_isoc_dvb_max_packetsize(dev);
d18e2fda DH	158
3421b778	159	return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
d18e2fda	160	EM28XX_DVB_NUM_BUFS, max_dvb_packet_size,
c67ec53f	161	dvb_isoc_copy);
3421b778 AT	162	}
3421b778 AT	163
6ea54d93 DSL	164	static int stop_streaming(struct em28xx_dvb *dvb)
6ea54d93 DSL	165	{
3421b778 AT	166	struct em28xx *dev = dvb->adapter.priv;
	167
	168	em28xx_uninit_isoc(dev);
c67ec53f	169
2fe3e2ee	170	em28xx_set_mode(dev, EM28XX_SUSPEND);
c67ec53f	171
3aefb79a MCC	172	return 0;
	173	}
	174
3421b778 AT	175	static int start_feed(struct dvb_demux_feed *feed)
	176	{
	177	struct dvb_demux *demux = feed->demux;
	178	struct em28xx_dvb *dvb = demux->priv;
	179	int rc, ret;
	180
	181	if (!demux->dmx.frontend)
	182	return -EINVAL;
	183
	184	mutex_lock(&dvb->lock);
	185	dvb->nfeeds++;
	186	rc = dvb->nfeeds;
	187
	188	if (dvb->nfeeds == 1) {
	189	ret = start_streaming(dvb);
6ea54d93 DSL	190	if (ret < 0)
6ea54d93 DSL	191	rc = ret;
3421b778 AT	192	}
	193
	194	mutex_unlock(&dvb->lock);
	195	return rc;
	196	}
	197
	198	static int stop_feed(struct dvb_demux_feed *feed)
	199	{
	200	struct dvb_demux *demux = feed->demux;
	201	struct em28xx_dvb *dvb = demux->priv;
	202	int err = 0;
	203
	204	mutex_lock(&dvb->lock);
	205	dvb->nfeeds--;
6ea54d93 DSL	206
6ea54d93 DSL	207	if (0 == dvb->nfeeds)
3421b778	208	err = stop_streaming(dvb);
6ea54d93	209
3421b778 AT	210	mutex_unlock(&dvb->lock);
	211	return err;
	212	}
	213
	214
e3569abc MCC	215
	216	/* ------------------------------------------------------------------ */
	217	static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
	218	{
	219	struct em28xx *dev = fe->dvb->priv;
	220
	221	if (acquire)
	222	return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
	223	else
2fe3e2ee	224	return em28xx_set_mode(dev, EM28XX_SUSPEND);
e3569abc MCC	225	}
e3569abc MCC	226
3aefb79a MCC	227	/* ------------------------------------------------------------------ */
3aefb79a MCC	228
227ad4ab MCC	229	static struct lgdt330x_config em2880_lgdt3303_dev = {
	230	.demod_address = 0x0e,
	231	.demod_chip = LGDT3303,
	232	};
3aefb79a	233
7e6388a1 AT	234	static struct zl10353_config em28xx_zl10353_with_xc3028 = {
	235	.demod_address = (0x1e >> 1),
	236	.no_tuner = 1,
	237	.parallel_ts = 1,
	238	.if2 = 45600,
	239	};
	240
6e7b9ea0 RK	241	static struct s5h1409_config em28xx_s5h1409_with_xc3028 = {
	242	.demod_address = 0x32 >> 1,
	243	.output_mode = S5H1409_PARALLEL_OUTPUT,
	244	.gpio = S5H1409_GPIO_OFF,
	245	.inversion = S5H1409_INVERSION_OFF,
	246	.status_mode = S5H1409_DEMODLOCKING,
	247	.mpeg_timing = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK
	248	};
	249
a84f79ae	250	static struct zl10353_config em28xx_zl10353_xc3028_no_i2c_gate = {
f797608c DH	251	.demod_address = (0x1e >> 1),
	252	.no_tuner = 1,
	253	.disable_i2c_gate_ctrl = 1,
	254	.parallel_ts = 1,
	255	.if2 = 45600,
	256	};
	257
17d9d558 DH	258	#ifdef EM28XX_DRX397XD_SUPPORT
	259	/* [TODO] djh - not sure yet what the device config needs to contain */
	260	static struct drx397xD_config em28xx_drx397xD_with_xc3028 = {
	261	.demod_address = (0xe0 >> 1),
	262	};
	263	#endif
	264
4fb202a8 DH	265	static int mt352_terratec_xs_init(struct dvb_frontend *fe)
	266	{
	267	/* Values extracted from a USB trace of the Terratec Windows driver */
	268	static u8 clock_config[] = { CLOCK_CTL, 0x38, 0x2c };
	269	static u8 reset[] = { RESET, 0x80 };
	270	static u8 adc_ctl_1_cfg[] = { ADC_CTL_1, 0x40 };
	271	static u8 agc_cfg[] = { AGC_TARGET, 0x28, 0xa0 };
	272	static u8 input_freq_cfg[] = { INPUT_FREQ_1, 0x31, 0xb8 };
	273	static u8 rs_err_cfg[] = { RS_ERR_PER_1, 0x00, 0x4d };
	274	static u8 capt_range_cfg[] = { CAPT_RANGE, 0x32 };
	275	static u8 trl_nom_cfg[] = { TRL_NOMINAL_RATE_1, 0x64, 0x00 };
	276	static u8 tps_given_cfg[] = { TPS_GIVEN_1, 0x40, 0x80, 0x50 };
ff69786b	277	static u8 tuner_go[] = { TUNER_GO, 0x01};
4fb202a8 DH	278
	279	mt352_write(fe, clock_config, sizeof(clock_config));
	280	udelay(200);
	281	mt352_write(fe, reset, sizeof(reset));
	282	mt352_write(fe, adc_ctl_1_cfg, sizeof(adc_ctl_1_cfg));
	283	mt352_write(fe, agc_cfg, sizeof(agc_cfg));
	284	mt352_write(fe, input_freq_cfg, sizeof(input_freq_cfg));
	285	mt352_write(fe, rs_err_cfg, sizeof(rs_err_cfg));
	286	mt352_write(fe, capt_range_cfg, sizeof(capt_range_cfg));
	287	mt352_write(fe, trl_nom_cfg, sizeof(trl_nom_cfg));
	288	mt352_write(fe, tps_given_cfg, sizeof(tps_given_cfg));
	289	mt352_write(fe, tuner_go, sizeof(tuner_go));
	290	return 0;
	291	}
	292
	293	static struct mt352_config terratec_xs_mt352_cfg = {
	294	.demod_address = (0x1e >> 1),
	295	.no_tuner = 1,
	296	.if2 = 45600,
	297	.demod_init = mt352_terratec_xs_init,
	298	};
	299
285eb1a4 AP	300	static struct tda10023_config em28xx_tda10023_config = {
	301	.demod_address = 0x0c,
	302	.invert = 1,
	303	};
	304
3aefb79a MCC	305	/* ------------------------------------------------------------------ */
	306
	307	static int attach_xc3028(u8 addr, struct em28xx *dev)
	308	{
	309	struct dvb_frontend *fe;
3ca9c093 MCC	310	struct xc2028_config cfg;
3ca9c093 MCC	311
6ea54d93	312	memset(&cfg, 0, sizeof(cfg));
3ca9c093 MCC	313	cfg.i2c_adap = &dev->i2c_adap;
3ca9c093 MCC	314	cfg.i2c_addr = addr;
3ca9c093	315
3421b778	316	if (!dev->dvb->frontend) {
480be185 FR	317	em28xx_errdev("/2: dvb frontend not attached. "
480be185 FR	318	"Can't attach xc3028\n");
3aefb79a MCC	319	return -EINVAL;
	320	}
	321
3421b778	322	fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
3aefb79a	323	if (!fe) {
480be185	324	em28xx_errdev("/2: xc3028 attach failed\n");
3421b778	325	dvb_frontend_detach(dev->dvb->frontend);
3421b778	326	dev->dvb->frontend = NULL;
3aefb79a MCC	327	return -EINVAL;
	328	}
	329
480be185	330	em28xx_info("%s/2: xc3028 attached\n", dev->name);
3aefb79a MCC	331
	332	return 0;
	333	}
	334
3421b778 AT	335	/* ------------------------------------------------------------------ */
3421b778 AT	336
d45b9b8a	337	static int register_dvb(struct em28xx_dvb *dvb,
3421b778 AT	338	struct module *module,
	339	struct em28xx *dev,
	340	struct device *device)
3aefb79a	341	{
3421b778	342	int result;
3aefb79a	343
3421b778	344	mutex_init(&dvb->lock);
3aefb79a	345
3421b778 AT	346	/* register adapter */
	347	result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
	348	adapter_nr);
	349	if (result < 0) {
	350	printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
	351	dev->name, result);
	352	goto fail_adapter;
	353	}
e3569abc MCC	354
	355	/* Ensure all frontends negotiate bus access */
	356	dvb->frontend->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
	357
3421b778 AT	358	dvb->adapter.priv = dev;
	359
	360	/* register frontend */
	361	result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
	362	if (result < 0) {
	363	printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
	364	dev->name, result);
	365	goto fail_frontend;
	366	}
	367
	368	/* register demux stuff */
	369	dvb->demux.dmx.capabilities =
	370	DMX_TS_FILTERING \| DMX_SECTION_FILTERING \|
	371	DMX_MEMORY_BASED_FILTERING;
	372	dvb->demux.priv = dvb;
	373	dvb->demux.filternum = 256;
	374	dvb->demux.feednum = 256;
	375	dvb->demux.start_feed = start_feed;
	376	dvb->demux.stop_feed = stop_feed;
e3569abc	377
3421b778 AT	378	result = dvb_dmx_init(&dvb->demux);
	379	if (result < 0) {
	380	printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
	381	dev->name, result);
	382	goto fail_dmx;
	383	}
	384
	385	dvb->dmxdev.filternum = 256;
	386	dvb->dmxdev.demux = &dvb->demux.dmx;
	387	dvb->dmxdev.capabilities = 0;
	388	result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
	389	if (result < 0) {
	390	printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
	391	dev->name, result);
	392	goto fail_dmxdev;
	393	}
52284c3e	394
3421b778 AT	395	dvb->fe_hw.source = DMX_FRONTEND_0;
	396	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	397	if (result < 0) {
	398	printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
	399	dev->name, result);
	400	goto fail_fe_hw;
	401	}
	402
	403	dvb->fe_mem.source = DMX_MEMORY_FE;
	404	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	405	if (result < 0) {
	406	printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
	407	dev->name, result);
	408	goto fail_fe_mem;
	409	}
	410
	411	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	412	if (result < 0) {
	413	printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
	414	dev->name, result);
	415	goto fail_fe_conn;
	416	}
	417
	418	/* register network adapter */
	419	dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
	420	return 0;
	421
	422	fail_fe_conn:
	423	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	424	fail_fe_mem:
	425	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	426	fail_fe_hw:
	427	dvb_dmxdev_release(&dvb->dmxdev);
	428	fail_dmxdev:
	429	dvb_dmx_release(&dvb->demux);
	430	fail_dmx:
	431	dvb_unregister_frontend(dvb->frontend);
	432	fail_frontend:
	433	dvb_frontend_detach(dvb->frontend);
	434	dvb_unregister_adapter(&dvb->adapter);
	435	fail_adapter:
	436	return result;
	437	}
	438
	439	static void unregister_dvb(struct em28xx_dvb *dvb)
	440	{
	441	dvb_net_release(&dvb->net);
	442	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	443	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	444	dvb_dmxdev_release(&dvb->dmxdev);
	445	dvb_dmx_release(&dvb->demux);
	446	dvb_unregister_frontend(dvb->frontend);
	447	dvb_frontend_detach(dvb->frontend);
	448	dvb_unregister_adapter(&dvb->adapter);
	449	}
	450
	451
	452	static int dvb_init(struct em28xx *dev)
	453	{
	454	int result = 0;
	455	struct em28xx_dvb *dvb;
	456
505b6d0b	457	if (!dev->board.has_dvb) {
df619181 DH	458	/* This device does not support the extension */
	459	return 0;
	460	}
	461
3421b778	462	dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
6ea54d93 DSL	463
6ea54d93 DSL	464	if (dvb == NULL) {
480be185	465	em28xx_info("em28xx_dvb: memory allocation failed\n");
3421b778 AT	466	return -ENOMEM;
	467	}
	468	dev->dvb = dvb;
3aefb79a	469
c67ec53f	470	em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
3aefb79a MCC	471	/* init frontend */
3aefb79a MCC	472	switch (dev->model) {
f89bc329	473	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
10ac6603	474	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
4fd305b2	475	case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
e14b3658	476	case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
3421b778 AT	477	dvb->frontend = dvb_attach(lgdt330x_attach,
	478	&em2880_lgdt3303_dev,
	479	&dev->i2c_adap);
	480	if (attach_xc3028(0x61, dev) < 0) {
	481	result = -EINVAL;
	482	goto out_free;
	483	}
227ad4ab	484	break;
46510b56	485	case EM2880_BOARD_KWORLD_DVB_310U:
3421b778 AT	486	dvb->frontend = dvb_attach(zl10353_attach,
	487	&em28xx_zl10353_with_xc3028,
	488	&dev->i2c_adap);
	489	if (attach_xc3028(0x61, dev) < 0) {
	490	result = -EINVAL;
	491	goto out_free;
	492	}
7e6388a1	493	break;
a84f79ae	494	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
ec994d05	495	case EM2882_BOARD_TERRATEC_HYBRID_XS:
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:
65638011	506	case EM2880_BOARD_TERRATEC_HYBRID_XS_FR:
d5b3ba9c	507	case EM2881_BOARD_PINNACLE_HYBRID_PRO:
7ca7ef60	508	case EM2882_BOARD_DIKOM_DK300:
f797608c	509	dvb->frontend = dvb_attach(zl10353_attach,
a84f79ae	510	&em28xx_zl10353_xc3028_no_i2c_gate,
f797608c DH	511	&dev->i2c_adap);
	512	if (dvb->frontend == NULL) {
	513	/* This board could have either a zl10353 or a mt352.
	514	If the chip id isn't for zl10353, try mt352 */
4fb202a8 DH	515	dvb->frontend = dvb_attach(mt352_attach,
	516	&terratec_xs_mt352_cfg,
	517	&dev->i2c_adap);
f797608c	518	}
4fb202a8	519
f797608c DH	520	if (attach_xc3028(0x61, dev) < 0) {
	521	result = -EINVAL;
	522	goto out_free;
	523	}
	524	break;
6e7b9ea0	525	case EM2883_BOARD_KWORLD_HYBRID_330U:
19859229	526	case EM2882_BOARD_EVGA_INDTUBE:
6e7b9ea0 RK	527	dvb->frontend = dvb_attach(s5h1409_attach,
	528	&em28xx_s5h1409_with_xc3028,
	529	&dev->i2c_adap);
	530	if (attach_xc3028(0x61, dev) < 0) {
	531	result = -EINVAL;
	532	goto out_free;
	533	}
	534	break;
d7de5d8f FM	535	case EM2882_BOARD_KWORLD_ATSC_315U:
	536	dvb->frontend = dvb_attach(lgdt330x_attach,
	537	&em2880_lgdt3303_dev,
	538	&dev->i2c_adap);
	539	if (dvb->frontend != NULL) {
	540	if (!dvb_attach(simple_tuner_attach, dvb->frontend,
	541	&dev->i2c_adap, 0x61, TUNER_THOMSON_DTT761X)) {
	542	result = -EINVAL;
	543	goto out_free;
	544	}
	545	}
	546	break;
17d9d558 DH	547	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
	548	#ifdef EM28XX_DRX397XD_SUPPORT
	549	/* We don't have the config structure properly populated, so
	550	this is commented out for now */
	551	dvb->frontend = dvb_attach(drx397xD_attach,
	552	&em28xx_drx397xD_with_xc3028,
	553	&dev->i2c_adap);
	554	if (attach_xc3028(0x61, dev) < 0) {
	555	result = -EINVAL;
	556	goto out_free;
	557	}
	558	break;
	559	#endif
285eb1a4 AP	560	case EM2870_BOARD_REDDO_DVB_C_USB_BOX:
	561	/* Philips CU1216L NIM (Philips TDA10023 + Infineon TUA6034) */
	562	dvb->frontend = dvb_attach(tda10023_attach,
	563	&em28xx_tda10023_config,
	564	&dev->i2c_adap, 0x48);
	565	if (dvb->frontend) {
	566	if (!dvb_attach(simple_tuner_attach, dvb->frontend,
	567	&dev->i2c_adap, 0x60, TUNER_PHILIPS_CU1216L)) {
	568	result = -EINVAL;
	569	goto out_free;
	570	}
	571	}
	572	break;
3aefb79a	573	default:
480be185 FR	574	em28xx_errdev("/2: The frontend of your DVB/ATSC card"
480be185 FR	575	" isn't supported yet\n");
3aefb79a MCC	576	break;
3aefb79a MCC	577	}
3421b778	578	if (NULL == dvb->frontend) {
480be185	579	em28xx_errdev("/2: frontend initialization failed\n");
3421b778 AT	580	result = -EINVAL;
3421b778 AT	581	goto out_free;
3aefb79a	582	}
d7cba043 MK	583	/* define general-purpose callback pointer */
d7cba043 MK	584	dvb->frontend->callback = em28xx_tuner_callback;
3aefb79a MCC	585
3aefb79a MCC	586	/* register everything */
3421b778 AT	587	result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
3421b778 AT	588
6ea54d93	589	if (result < 0)
3421b778	590	goto out_free;
3421b778	591
2fe3e2ee	592	em28xx_set_mode(dev, EM28XX_SUSPEND);
480be185	593	em28xx_info("Successfully loaded em28xx-dvb\n");
3421b778 AT	594	return 0;
	595
	596	out_free:
2fe3e2ee	597	em28xx_set_mode(dev, EM28XX_SUSPEND);
3421b778 AT	598	kfree(dvb);
	599	dev->dvb = NULL;
	600	return result;
3aefb79a MCC	601	}
	602
	603	static int dvb_fini(struct em28xx *dev)
	604	{
505b6d0b	605	if (!dev->board.has_dvb) {
df619181 DH	606	/* This device does not support the extension */
	607	return 0;
	608	}
	609
3421b778 AT	610	if (dev->dvb) {
3421b778 AT	611	unregister_dvb(dev->dvb);
19f48cb1	612	kfree(dev->dvb);
3421b778 AT	613	dev->dvb = NULL;
3421b778 AT	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);