C++ dvb_dmx_release函数代码示例

void au0828_dvb_unregister(struct au0828_dev *dev)
{
	struct au0828_dvb *dvb = &dev->dvb;

	dprintk(1, "%s()\n", __func__);

	if (dvb->frontend == NULL)
		return;

	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 void __exit vtunerc_exit(void)
{
	struct dvb_demux *dvbdemux;
	struct dmx_demux *dmx;
	int idx;

	vtunerc_unregister_ctrldev(&config);

	for (idx = 0; idx < config.devices; idx++) {
		struct vtunerc_ctx *ctx = vtunerc_tbl[idx];
		if(!ctx)
			continue;
		vtunerc_tbl[idx] = NULL;
#ifdef CONFIG_PROC_FS
		remove_proc_entry(ctx->procname, NULL);
		kfree(ctx->procname);
#endif

		vtunerc_frontend_clear(ctx);

		dvbdemux = &ctx->demux;
		dmx = &dvbdemux->dmx;

		dmx->disconnect_frontend(dmx);
		dmx->remove_frontend(dmx, &ctx->mem_frontend);
		dmx->remove_frontend(dmx, &ctx->hw_frontend);
		dvb_dmxdev_release(&ctx->dmxdev);
		dvb_dmx_release(dvbdemux);
		dvb_unregister_adapter(&ctx->dvb_adapter);

		// free allocated buffer
		if(ctx->kernel_buf != NULL) {
			kfree(ctx->kernel_buf);
			printk(KERN_INFO "vtunerc%d: deallocated buffer of %Zu bytes\n", idx, ctx->kernel_buf_size);
			ctx->kernel_buf = NULL;
			ctx->kernel_buf_size = 0;

		}

		kfree(ctx);
	}

	printk(KERN_NOTICE "vtunerc: unloaded successfully\n");
}

void cx18_dvb_unregister(struct cx18_stream *stream)
{
	struct cx18 *cx = stream->cx;
	struct cx18_dvb *dvb = &stream->dvb;
	struct dvb_adapter *dvb_adapter;
	struct dvb_demux *dvbdemux;
	struct dmx_demux *dmx;

	CX18_INFO("unregister DVB\n");

	dvb_adapter = &dvb->dvb_adapter;
	dvbdemux = &dvb->demux;
	dmx = &dvbdemux->dmx;

	dmx->close(dmx);
	dvb_net_release(&dvb->dvbnet);
	dmx->remove_frontend(dmx, &dvb->mem_frontend);
	dmx->remove_frontend(dmx, &dvb->hw_frontend);
	dvb_dmxdev_release(&dvb->dmxdev);
	dvb_dmx_release(dvbdemux);
	dvb_unregister_frontend(dvb->fe);
	dvb_frontend_detach(dvb->fe);
	dvb_unregister_adapter(dvb_adapter);
}

//.........这里部分代码省略.........
	/* Ensure all frontends negotiate bus access */
	dvb->fe[0]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
	if (dvb->fe[1])
		dvb->fe[1]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;

	dvb->adapter.priv = &dev->i2c_bus[dev->def_i2c_bus];

	/* register frontend */
	result = dvb_register_frontend(&dvb->adapter, dvb->fe[0]);
	if (result < 0) {
		printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
		       dev->name, result);
		goto fail_frontend0;
	}

	/* register 2nd frontend */
	if (dvb->fe[1]) {
		result = dvb_register_frontend(&dvb->adapter, dvb->fe[1]);
		if (result < 0) {
			printk(KERN_WARNING "%s: 2nd dvb_register_frontend failed (errno = %d)\n",
				dev->name, result);
			goto fail_frontend1;
		}
	}

	/* register demux stuff */
	dvb->demux.dmx.capabilities =
		DMX_TS_FILTERING | DMX_SECTION_FILTERING |
		DMX_MEMORY_BASED_FILTERING;
	dvb->demux.priv       = dvb;
	dvb->demux.filternum  = 256;
	dvb->demux.feednum    = 256;
	dvb->demux.start_feed = em28xx_start_feed;
	dvb->demux.stop_feed  = em28xx_stop_feed;

	result = dvb_dmx_init(&dvb->demux);
	if (result < 0) {
		printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
		       dev->name, result);
		goto fail_dmx;
	}

	dvb->dmxdev.filternum    = 256;
	dvb->dmxdev.demux        = &dvb->demux.dmx;
	dvb->dmxdev.capabilities = 0;
	result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
	if (result < 0) {
		printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
		       dev->name, result);
		goto fail_dmxdev;
	}

	dvb->fe_hw.source = DMX_FRONTEND_0;
	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	if (result < 0) {
		printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
		       dev->name, result);
		goto fail_fe_hw;
	}

	dvb->fe_mem.source = DMX_MEMORY_FE;
	result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
	if (result < 0) {
		printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
		       dev->name, result);
		goto fail_fe_mem;
	}

	result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
	if (result < 0) {
		printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
		       dev->name, result);
		goto fail_fe_conn;
	}

	/* register network adapter */
	dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
	return 0;

fail_fe_conn:
	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
fail_fe_mem:
	dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
fail_fe_hw:
	dvb_dmxdev_release(&dvb->dmxdev);
fail_dmxdev:
	dvb_dmx_release(&dvb->demux);
fail_dmx:
	if (dvb->fe[1])
		dvb_unregister_frontend(dvb->fe[1]);
	dvb_unregister_frontend(dvb->fe[0]);
fail_frontend1:
	if (dvb->fe[1])
		dvb_frontend_detach(dvb->fe[1]);
fail_frontend0:
	dvb_frontend_detach(dvb->fe[0]);
	dvb_unregister_adapter(&dvb->adapter);
fail_adapter:
	return result;
}

static int flexcop_dvb_init(struct flexcop_device *fc)
{
	int ret = dvb_register_adapter(&fc->dvb_adapter,
			"FlexCop Digital TV device", fc->owner,
			fc->dev, adapter_nr);
	if (ret < 0) {
		err("error registering DVB adapter");
		return ret;
	}
	fc->dvb_adapter.priv = fc;

	fc->demux.dmx.capabilities = (DMX_TS_FILTERING | DMX_SECTION_FILTERING
			| DMX_MEMORY_BASED_FILTERING);
	fc->demux.priv = fc;
	fc->demux.filternum = fc->demux.feednum = FC_MAX_FEED;
	fc->demux.start_feed = flexcop_dvb_start_feed;
	fc->demux.stop_feed = flexcop_dvb_stop_feed;
	fc->demux.write_to_decoder = NULL;

	ret = dvb_dmx_init(&fc->demux);
	if (ret < 0) {
		err("dvb_dmx failed: error %d", ret);
		goto err_dmx;
	}

	fc->hw_frontend.source = DMX_FRONTEND_0;

	fc->dmxdev.filternum = fc->demux.feednum;
	fc->dmxdev.demux = &fc->demux.dmx;
	fc->dmxdev.capabilities = 0;
	ret = dvb_dmxdev_init(&fc->dmxdev, &fc->dvb_adapter);
	if (ret < 0) {
		err("dvb_dmxdev_init failed: error %d", ret);
		goto err_dmx_dev;
	}

	ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->hw_frontend);
	if (ret < 0) {
		err("adding hw_frontend to dmx failed: error %d", ret);
		goto err_dmx_add_hw_frontend;
	}

	fc->mem_frontend.source = DMX_MEMORY_FE;
	ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->mem_frontend);
	if (ret < 0) {
		err("adding mem_frontend to dmx failed: error %d", ret);
		goto err_dmx_add_mem_frontend;
	}

	ret = fc->demux.dmx.connect_frontend(&fc->demux.dmx, &fc->hw_frontend);
	if (ret < 0) {
		err("connect frontend failed: error %d", ret);
		goto err_connect_frontend;
	}

	ret = dvb_net_init(&fc->dvb_adapter, &fc->dvbnet, &fc->demux.dmx);
	if (ret < 0) {
		err("dvb_net_init failed: error %d", ret);
		goto err_net;
	}

	fc->init_state |= FC_STATE_DVB_INIT;
	return 0;

err_net:
	fc->demux.dmx.disconnect_frontend(&fc->demux.dmx);
err_connect_frontend:
	fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->mem_frontend);
err_dmx_add_mem_frontend:
	fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->hw_frontend);
err_dmx_add_hw_frontend:
	dvb_dmxdev_release(&fc->dmxdev);
err_dmx_dev:
	dvb_dmx_release(&fc->demux);
err_dmx:
	dvb_unregister_adapter(&fc->dvb_adapter);
	return ret;
}

int fdtv_dvb_register(struct firedtv *fdtv, const char *name)
{
	int err;

	err = dvb_register_adapter(&fdtv->adapter, name,
				   THIS_MODULE, fdtv->device, adapter_nr);
	if (err < 0)
		goto fail_log;

	/*DMX_TS_FILTERING | DMX_SECTION_FILTERING*/
	fdtv->demux.dmx.capabilities = 0;

	fdtv->demux.priv	= fdtv;
	fdtv->demux.filternum	= 16;
	fdtv->demux.feednum	= 16;
	fdtv->demux.start_feed	= fdtv_start_feed;
	fdtv->demux.stop_feed	= fdtv_stop_feed;
	fdtv->demux.write_to_decoder = NULL;

	err = dvb_dmx_init(&fdtv->demux);
	if (err)
		goto fail_unreg_adapter;

	fdtv->dmxdev.filternum    = 16;
	fdtv->dmxdev.demux        = &fdtv->demux.dmx;
	fdtv->dmxdev.capabilities = 0;

	err = dvb_dmxdev_init(&fdtv->dmxdev, &fdtv->adapter);
	if (err)
		goto fail_dmx_release;

	fdtv->frontend.source = DMX_FRONTEND_0;

	err = fdtv->demux.dmx.add_frontend(&fdtv->demux.dmx, &fdtv->frontend);
	if (err)
		goto fail_dmxdev_release;

	err = fdtv->demux.dmx.connect_frontend(&fdtv->demux.dmx,
					       &fdtv->frontend);
	if (err)
		goto fail_rem_frontend;

	err = dvb_net_init(&fdtv->adapter, &fdtv->dvbnet, &fdtv->demux.dmx);
	if (err)
		goto fail_disconnect_frontend;

	fdtv_frontend_init(fdtv, name);
	err = dvb_register_frontend(&fdtv->adapter, &fdtv->fe);
	if (err)
		goto fail_net_release;

	err = fdtv_ca_register(fdtv);
	if (err)
		dev_info(fdtv->device,
			 "Conditional Access Module not enabled\n");
	return 0;

fail_net_release:
	dvb_net_release(&fdtv->dvbnet);
fail_disconnect_frontend:
	fdtv->demux.dmx.close(&fdtv->demux.dmx);
fail_rem_frontend:
	fdtv->demux.dmx.remove_frontend(&fdtv->demux.dmx, &fdtv->frontend);
fail_dmxdev_release:
	dvb_dmxdev_release(&fdtv->dmxdev);
fail_dmx_release:
	dvb_dmx_release(&fdtv->demux);
fail_unreg_adapter:
	dvb_unregister_adapter(&fdtv->adapter);
fail_log:
	dev_err(fdtv->device, "DVB initialization failed\n");
	return err;
}

//.........这里部分代码省略.........

	mantis->demux.priv		= mantis;
	mantis->demux.filternum		= 256;
	mantis->demux.feednum		= 256;
	mantis->demux.start_feed	= mantis_dvb_start_feed;
	mantis->demux.stop_feed		= mantis_dvb_stop_feed;
	mantis->demux.write_to_decoder	= NULL;

	dprintk(MANTIS_DEBUG, 1, "dvb_dmx_init");
	result = dvb_dmx_init(&mantis->demux);
	if (result < 0) {
		dprintk(MANTIS_ERROR, 1, "dvb_dmx_init failed, ERROR=%d", result);

		goto err0;
	}

	mantis->dmxdev.filternum	= 256;
	mantis->dmxdev.demux		= &mantis->demux.dmx;
	mantis->dmxdev.capabilities	= 0;
	dprintk(MANTIS_DEBUG, 1, "dvb_dmxdev_init");

	result = dvb_dmxdev_init(&mantis->dmxdev, &mantis->dvb_adapter);
	if (result < 0) {

		dprintk(MANTIS_ERROR, 1, "dvb_dmxdev_init failed, ERROR=%d", result);
		goto err1;
	}

	mantis->fe_hw.source		= DMX_FRONTEND_0;
	result = mantis->demux.dmx.add_frontend(&mantis->demux.dmx, &mantis->fe_hw);
	if (result < 0) {

		dprintk(MANTIS_ERROR, 1, "dvb_dmx_init failed, ERROR=%d", result);
		goto err2;
	}

	mantis->fe_mem.source		= DMX_MEMORY_FE;
	result = mantis->demux.dmx.add_frontend(&mantis->demux.dmx, &mantis->fe_mem);
	if (result < 0) {
		dprintk(MANTIS_ERROR, 1, "dvb_dmx_init failed, ERROR=%d", result);
		goto err3;
	}

	result = mantis->demux.dmx.connect_frontend(&mantis->demux.dmx, &mantis->fe_hw);
	if (result < 0) {
		dprintk(MANTIS_ERROR, 1, "dvb_dmx_init failed, ERROR=%d", result);
		goto err4;
	}

	dvb_net_init(&mantis->dvb_adapter, &mantis->dvbnet, &mantis->demux.dmx);
	tasklet_init(&mantis->tasklet, mantis_dma_xfer, (unsigned long) mantis);
	tasklet_disable(&mantis->tasklet);
	if (mantis->hwconfig) {
		result = config->frontend_init(mantis, mantis->fe);
		if (result < 0) {
			dprintk(MANTIS_ERROR, 1, "!!! NO Frontends found !!!");
			goto err5;
		} else {
			if (mantis->fe == NULL) {
				dprintk(MANTIS_ERROR, 1, "FE <NULL>");
				goto err5;
			}

			if (dvb_register_frontend(&mantis->dvb_adapter, mantis->fe)) {
				dprintk(MANTIS_ERROR, 1, "ERROR: Frontend registration failed");

				if (mantis->fe->ops.release)
					mantis->fe->ops.release(mantis->fe);

				mantis->fe = NULL;
				goto err5;
			}
		}
	}

	return 0;

	/*                     */
err5:
	tasklet_kill(&mantis->tasklet);
	dvb_net_release(&mantis->dvbnet);
	dvb_unregister_frontend(mantis->fe);
	dvb_frontend_detach(mantis->fe);
err4:
	mantis->demux.dmx.remove_frontend(&mantis->demux.dmx, &mantis->fe_mem);

err3:
	mantis->demux.dmx.remove_frontend(&mantis->demux.dmx, &mantis->fe_hw);

err2:
	dvb_dmxdev_release(&mantis->dmxdev);

err1:
	dvb_dmx_release(&mantis->demux);

err0:
	dvb_unregister_adapter(&mantis->dvb_adapter);

	return result;
}

int as102_dvb_register(struct as102_dev_t *as102_dev)
{
	struct device *dev = &as102_dev->bus_adap.usb_dev->dev;
	int ret;

	ret = dvb_register_adapter(&as102_dev->dvb_adap,
			   as102_dev->name, THIS_MODULE,
			   dev, adapter_nr);
	if (ret < 0) {
		dev_err(dev, "%s: dvb_register_adapter() failed: %d\n",
			__func__, ret);
		return ret;
	}

	as102_dev->dvb_dmx.priv = as102_dev;
	as102_dev->dvb_dmx.filternum = pid_filtering ? 16 : 256;
	as102_dev->dvb_dmx.feednum = 256;
	as102_dev->dvb_dmx.start_feed = as102_dvb_dmx_start_feed;
	as102_dev->dvb_dmx.stop_feed = as102_dvb_dmx_stop_feed;

	as102_dev->dvb_dmx.dmx.capabilities = DMX_TS_FILTERING |
					      DMX_SECTION_FILTERING;

	as102_dev->dvb_dmxdev.filternum = as102_dev->dvb_dmx.filternum;
	as102_dev->dvb_dmxdev.demux = &as102_dev->dvb_dmx.dmx;
	as102_dev->dvb_dmxdev.capabilities = 0;

	ret = dvb_dmx_init(&as102_dev->dvb_dmx);
	if (ret < 0) {
		dev_err(dev, "%s: dvb_dmx_init() failed: %d\n", __func__, ret);
		goto edmxinit;
	}

	ret = dvb_dmxdev_init(&as102_dev->dvb_dmxdev, &as102_dev->dvb_adap);
	if (ret < 0) {
		dev_err(dev, "%s: dvb_dmxdev_init() failed: %d\n",
			__func__, ret);
		goto edmxdinit;
	}

	ret = as102_dvb_register_fe(as102_dev, &as102_dev->dvb_fe);
	if (ret < 0) {
		dev_err(dev, "%s: as102_dvb_register_frontend() failed: %d",
		    __func__, ret);
		goto efereg;
	}

	/* init bus mutex for token locking */
	mutex_init(&as102_dev->bus_adap.lock);

	/* init start / stop stream mutex */
	mutex_init(&as102_dev->sem);

	/*
	 * try to load as102 firmware. If firmware upload failed, we'll be
	 * able to upload it later.
	 */
	if (fw_upload)
		try_then_request_module(as102_fw_upload(&as102_dev->bus_adap),
				"firmware_class");

	pr_info("Registered device %s", as102_dev->name);
	return 0;

efereg:
	dvb_dmxdev_release(&as102_dev->dvb_dmxdev);
edmxdinit:
	dvb_dmx_release(&as102_dev->dvb_dmx);
edmxinit:
	dvb_unregister_adapter(&as102_dev->dvb_adap);
	return ret;
}

/*static*/ int __init StmLoadModule(void)
{
	int Result;
	int i;
	short int AdapterNumbers[] = { -1 };
	DvbContext = kzalloc(sizeof(struct DvbContext_s), GFP_KERNEL);
	if (DvbContext == NULL)
	{
		DVB_ERROR("Unable to allocate device memory\n");
		return -ENOMEM;
	}
#ifdef __TDT__
	memset(DvbContext, 0, sizeof * DvbContext);
#endif
#ifdef __TDT__
	if (swts)
		printk("swts ->routing streams from dvr0 to tsm to pti to player\n");
	else
		printk("no swts ->routing streams from dvr0 direct to the player\n");
#endif
#if DVB_API_VERSION < 5
	Result = dvb_register_adapter(&DvbContext->DvbAdapter, MODULE_NAME, THIS_MODULE, NULL);
#else
	Result = dvb_register_adapter(&DvbContext->DvbAdapter, MODULE_NAME, THIS_MODULE, NULL, AdapterNumbers);
#endif
	if (Result < 0)
	{
		DVB_ERROR("Failed to register adapter (%d)\n", Result);
		kfree(DvbContext);
		DvbContext = NULL;
		return -ENOMEM;
	}
	mutex_init(&(DvbContext->Lock));
	mutex_lock(&(DvbContext->Lock));
	/*{{{  Register devices*/
	for (i = 0; i < DVB_MAX_DEVICES_PER_ADAPTER; i++)
	{
		struct DeviceContext_s* DeviceContext   = &DvbContext->DeviceContext[i];
		struct dvb_demux*       DvbDemux        = &DeviceContext->DvbDemux;
		struct dmxdev*          DmxDevice       = &DeviceContext->DmxDevice;
		struct dvb_device*      DvrDevice;
#ifdef __TDT__
		//sylvester: wenn der stream vom user kommt soll WriteToDecoder nix
		//tun, da das ja hier schon passiert. keine ahnung wie man das ansonsten
		//verhindern soll;-)
		DeviceContext->dvr_write = 0;
#endif
		DeviceContext->DvbContext = DvbContext;
#if defined (USE_KERNEL_DEMUX)
		memset(DvbDemux, 0, sizeof(struct dvb_demux));
#ifdef __TDT__
		DvbDemux->dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING | DMX_TS_DESCRAMBLING;
		/* currently only dummy to avoid EINVAL error. Later we need it for second frontend ?! */
		DvbDemux->dmx.set_source = SetSource;
#else
		DvbDemux->dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING;
#endif
		DvbDemux->priv = DeviceContext;
		DvbDemux->filternum = 32;
		DvbDemux->feednum = 32;
		DvbDemux->start_feed = StartFeed;
		DvbDemux->stop_feed = StopFeed;
#ifdef __TDT__
		DvbDemux->write_to_decoder = WriteToDecoder;
#else
		DvbDemux->write_to_decoder = NULL;
#endif
		Result = dvb_dmx_init(DvbDemux);
		if (Result < 0)
		{
			DVB_ERROR("dvb_dmx_init failed (errno = %d)\n", Result);
			return Result;
		}
		memset(DmxDevice, 0, sizeof(struct dmxdev));
		DmxDevice->filternum = DvbDemux->filternum;
		DmxDevice->demux = &DvbDemux->dmx;
		DmxDevice->capabilities = 0;
		Result = dvb_dmxdev_init(DmxDevice, &DvbContext->DvbAdapter);
		if (Result < 0)
		{
			DVB_ERROR("dvb_dmxdev_init failed (errno = %d)\n", Result);
			dvb_dmx_release(DvbDemux);
			return Result;
		}
		DvrDevice = DvrInit(DmxDevice->dvr_dvbdev->fops);
#ifdef __TDT__
		printk("%d: DeviceContext %p, DvbDemux %p, DmxDevice %p\n", i, DeviceContext, DvbDemux, DmxDevice);
#endif
		/* Unregister the built-in dvr device and replace it with our own version */
		dvb_unregister_device(DmxDevice->dvr_dvbdev);
		dvb_register_device(&DvbContext->DvbAdapter,
							&DmxDevice->dvr_dvbdev,
							DvrDevice, DmxDevice, DVB_DEVICE_DVR);
		DeviceContext->MemoryFrontend.source = DMX_MEMORY_FE;
		Result = DvbDemux->dmx.add_frontend(&DvbDemux->dmx, &DeviceContext->MemoryFrontend);
		if (Result < 0)
		{
			DVB_ERROR("add_frontend failed (errno = %d)\n", Result);
			dvb_dmxdev_release(DmxDevice);
			dvb_dmx_release(DvbDemux);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
			p->name, ret);
		goto fail2;
	}

	
	DBG_fCDVB("init demux devices, dmxdev_sw=%p\n", &p->dmxdev_sw);
	p->dmxdev_sw.filternum = max_filters;
	p->dmxdev_sw.demux = &p->demux_sw.dmx;
	p->dmxdev_sw.capabilities = 0;

	ret = dvb_dmxdev_init(&p->dmxdev_sw, p->adapter);
	if(ret) {
#if 0 
		printk(KERN_WARNING "%s: failed to init dmxdev\n",
			p->name);
#else
		SysPrintk(KERN_WARNING "%s: failed to init dmxdev\n",
			p->name);
#endif 
		goto fail3;
	}

	
	DBG_fCDVB("add h/w frontend\n");
	p->hw_frontend.source = DMX_FRONTEND_0;
	ret = p->demux_sw.dmx.add_frontend(&p->demux_sw.dmx,
						   &p->hw_frontend);
	if(ret < 0) {
#if 0 
		printk(KERN_WARNING "%s: cannot add hw frontend\n",
			p->name);
#else
		SysPrintk(KERN_WARNING "%s: cannot add hw frontend, ret=%d\n",
			p->name, ret);
#endif 
		goto fail4;
	}

	
	DBG_fCDVB("add memory frontend\n");
	p->mem_frontend.source = DMX_MEMORY_FE;
	ret = p->demux_sw.dmx.add_frontend(&p->demux_sw.dmx,
					 &p->mem_frontend);
	if(ret < 0) {
#if 0 
		printk(KERN_WARNING "%s: cannot add mem frontend\n",
			p->name);
#else
		SysPrintk(KERN_WARNING "%s: cannot add mem frontend\n",
			p->name);
#endif 
		goto fail5;
	}

	ret = p->demux_sw.dmx.connect_frontend(
					&p->demux_sw.dmx,
					&p->mem_frontend);
	if(ret < 0) {
#if 0 
		printk(KERN_WARNING "%s: cannot connect frontend\n",
			p->name);
#else
		SysPrintk(KERN_WARNING "%s: cannot connect frontend, ret=%d\n",
			p->name, ret);
#endif 
		goto fail6;
	}

	DBG_fCDVB("done\n");
	goto done;

fail6:
	p->demux_sw.dmx.remove_frontend(&p->demux_sw.dmx,
						&p->mem_frontend);
fail5:
	p->demux_sw.dmx.remove_frontend(&p->demux_sw.dmx,
						&p->hw_frontend);
fail4:
	dvb_dmxdev_release(&p->dmxdev_sw);
fail3:
	dvb_dmx_release(&p->demux_sw);
fail2:
	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
	dvb_unregister_i2c_bus(master_xfer, p->i2c_bus->adapter,
				p->i2c_bus->id);
	#endif
	dvb_unregister_adapter(p->adapter);
fail1:
	#if DVB_REG_NEWSTYLE
	#if 0 
	kfree(p->adapter);
	#else
	SysKFree(p->adapter);
	#endif 
fail0:
	#endif
done:
	return ret;

}

static int __init vtunerc_init(void)
{
	struct vtunerc_ctx *ctx = NULL;
	struct dvb_demux *dvbdemux;
	struct dmx_demux *dmx;
	int ret = -EINVAL, i, idx;

	printk(KERN_INFO "virtual DVB adapter driver, version "
			VTUNERC_MODULE_VERSION
			", (c) 2010-11 Honza Petrous, SmartImp.cz\n");

	request_module("dvb-core"); /* FIXME: dunno which way it should work :-/ */

	for (idx = 0; idx < config.devices; idx++) {
		ctx = kzalloc(sizeof(struct vtunerc_ctx), GFP_KERNEL);
		if (!ctx)
			return -ENOMEM;

		vtunerc_tbl[idx] = ctx;

		ctx->idx = idx;
		ctx->config = &config;
		ctx->ctrldev_request.type = -1;
		ctx->ctrldev_response.type = -1;
		init_waitqueue_head(&ctx->ctrldev_wait_request_wq);
		init_waitqueue_head(&ctx->ctrldev_wait_response_wq);

		/* dvb */

		/* create new adapter */
		ret = dvb_register_adapter(&ctx->dvb_adapter, DRIVER_NAME,
					   THIS_MODULE, NULL, adapter_nr);
		if (ret < 0)
			goto err_kfree;

		ctx->dvb_adapter.priv = ctx;

		memset(&ctx->demux, 0, sizeof(ctx->demux));
		dvbdemux = &ctx->demux;
		dvbdemux->priv = ctx;
		dvbdemux->filternum = MAX_PIDTAB_LEN;
		dvbdemux->feednum = MAX_PIDTAB_LEN;
		dvbdemux->start_feed = vtunerc_start_feed;
		dvbdemux->stop_feed = vtunerc_stop_feed;
		dvbdemux->dmx.capabilities = 0;
		ret = dvb_dmx_init(dvbdemux);
		if (ret < 0)
			goto err_dvb_unregister_adapter;

		dmx = &dvbdemux->dmx;

		ctx->hw_frontend.source = DMX_FRONTEND_0;
		ctx->mem_frontend.source = DMX_MEMORY_FE;
		ctx->dmxdev.filternum = MAX_PIDTAB_LEN;
		ctx->dmxdev.demux = dmx;

		ret = dvb_dmxdev_init(&ctx->dmxdev, &ctx->dvb_adapter);
		if (ret < 0)
			goto err_dvb_dmx_release;

		ret = dmx->add_frontend(dmx, &ctx->hw_frontend);
		if (ret < 0)
			goto err_dvb_dmxdev_release;

		ret = dmx->add_frontend(dmx, &ctx->mem_frontend);
		if (ret < 0)
			goto err_remove_hw_frontend;

		ret = dmx->connect_frontend(dmx, &ctx->hw_frontend);
		if (ret < 0)
			goto err_remove_mem_frontend;

		sema_init(&ctx->xchange_sem, 1);
		sema_init(&ctx->ioctl_sem, 1);
		sema_init(&ctx->tswrite_sem, 1);

		/* init pid table */
		for (i = 0; i < MAX_PIDTAB_LEN; i++)
			ctx->pidtab[i] = PID_UNKNOWN;

#ifdef CONFIG_PROC_FS
		{
			char procfilename[64];

			sprintf(procfilename, VTUNERC_PROC_FILENAME,
					ctx->idx);
			ctx->procname = my_strdup(procfilename);
			if (create_proc_read_entry(ctx->procname, 0, NULL,
							vtunerc_read_proc,
							ctx) == 0)
				printk(KERN_WARNING
					"vtunerc%d: Unable to register '%s' proc file\n",
					ctx->idx, ctx->procname);
		}
#endif
	}

	vtunerc_register_ctrldev(ctx);

out:
//.........这里部分代码省略.........

struct stfe *stfe_create(void *private_data, void *start_feed, void *stop_feed)
{
	struct stfe *stfe;
	int channel;
	int result;
	if (!(stfe = kmalloc(sizeof(struct stfe), GFP_KERNEL)))
		return NULL;
	printk("%s: Allocated stfe @ 0x%p\n", __FUNCTION__, stfe);
	memset(stfe, 0, sizeof(struct stfe));
	sema_init(&stfe->sem, 0);
	up(&stfe->sem);
	for (channel = 0; channel < STFE_MAXCHANNEL; ++channel)
	{
		stfe->channel[channel].id = channel;
		stfe->channel[channel].stfe = stfe;
		stfe->channel[channel].havana_id = private_data;
	}
	dvb_register_adapter(&stfe->adapter, "ST Generic Front End Driver", THIS_MODULE, NULL, adapter_nr);
	stfe->adapter.priv = stfe;
	memset(&stfe->dvb_demux, 0, sizeof(stfe->dvb_demux));
	stfe->dvb_demux.dmx.capabilities =
		DMX_TS_FILTERING | DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING;
	stfe->dvb_demux.priv = private_data;
	stfe->dvb_demux.filternum = 48;
	stfe->dvb_demux.feednum = STFE_MAXCHANNEL;
	stfe->dvb_demux.start_feed = start_feed;
	stfe->dvb_demux.stop_feed = stop_feed;
	stfe->dvb_demux.write_to_decoder = NULL; /* write_to_decoder;*/
	if ((result = dvb_dmx_init(&stfe->dvb_demux)) < 0)
	{
		printk("stfe_init: dvb_dmx_init failed (errno = %d)\n",
		       result);
		goto err;
	}
	stfe->dmxdev.filternum = stfe->dvb_demux.filternum;
	stfe->dmxdev.demux = &stfe->dvb_demux.dmx;
	stfe->dmxdev.capabilities = 0;
	if ((result = dvb_dmxdev_init(&stfe->dmxdev, &stfe->adapter)) < 0)
	{
		printk("stfe_init: dvb_dmxdev_init failed (errno = %d)\n",
		       result);
		dvb_dmx_release(&stfe->dvb_demux);
		goto err;
	}
	stfe->hw_frontend.source = DMX_FRONTEND_0;
	result = stfe->dvb_demux.dmx.add_frontend(&stfe->dvb_demux.dmx, &stfe->hw_frontend);
	if (result < 0)
		return NULL;
	stfe->mem_frontend.source = DMX_MEMORY_FE;
	result = stfe->dvb_demux.dmx.add_frontend(&stfe->dvb_demux.dmx, &stfe->mem_frontend);
	if (result < 0)
		return NULL;
	result = stfe->dvb_demux.dmx.connect_frontend(&stfe->dvb_demux.dmx, &stfe->hw_frontend);
	if (result < 0)
		return NULL;
	stfe->driver_data = private_data;
//i2c_add_driver(&st_tuner_i2c_driver);
	return stfe;
err:
	return NULL;
}

/**
 * Initialize a single demux device.
 *
 * @mpq_adapter: MPQ DVB adapter
 * @mpq_demux: The demux device to initialize
 *
 * Return     error code
 */
static int mpq_tspp_dmx_init(
				struct dvb_adapter *mpq_adapter,
				struct mpq_demux *mpq_demux)
{
	int result;

	MPQ_DVB_DBG_PRINT("%s executed\n", __func__);

	/* Set the kernel-demux object capabilities */
	mpq_demux->demux.dmx.capabilities =
		DMX_TS_FILTERING			|
		DMX_PES_FILTERING			|
		DMX_SECTION_FILTERING		|
		DMX_MEMORY_BASED_FILTERING	|
		DMX_CRC_CHECKING			|
		DMX_TS_DESCRAMBLING;

	/* Set dvb-demux "virtual" function pointers */
	mpq_demux->demux.priv = (void *)mpq_demux;
	mpq_demux->demux.filternum = TSPP_MAX_SECTION_FILTER_NUM;
	mpq_demux->demux.feednum = MPQ_MAX_DMX_FILES;
	mpq_demux->demux.start_feed = mpq_tspp_dmx_start_filtering;
	mpq_demux->demux.stop_feed = mpq_tspp_dmx_stop_filtering;
	mpq_demux->demux.write_to_decoder = NULL;
	mpq_demux->demux.decoder_fullness_init = NULL;
	mpq_demux->demux.decoder_fullness_wait = NULL;
	mpq_demux->demux.decoder_fullness_abort = NULL;
	mpq_demux->demux.decoder_buffer_status = NULL;
	mpq_demux->demux.reuse_decoder_buffer = NULL;
	mpq_demux->demux.set_secure_mode = NULL;
	mpq_demux->demux.oob_command = NULL;
	mpq_demux->demux.convert_ts = NULL;

	/* Initialize dvb_demux object */
	result = dvb_dmx_init(&mpq_demux->demux);
	if (result < 0) {
		MPQ_ERR_PRINT("%s: dvb_dmx_init failed\n", __func__);
		goto init_failed;
	}

	/* Now initailize the dmx-dev object */
	mpq_demux->dmxdev.filternum = MPQ_MAX_DMX_FILES;
	mpq_demux->dmxdev.demux = &mpq_demux->demux.dmx;
	mpq_demux->dmxdev.capabilities = DMXDEV_CAP_DUPLEX;

	mpq_demux->dmxdev.demux->set_source = mpq_dmx_set_source;
	mpq_demux->dmxdev.demux->get_caps = mpq_tspp_dmx_get_caps;

	result = dvb_dmxdev_init(&mpq_demux->dmxdev, mpq_adapter);
	if (result < 0) {
		MPQ_DVB_ERR_PRINT("%s: dvb_dmxdev_init failed (errno=%d)\n",
						  __func__,
						  result);

		goto init_failed_dmx_release;
	}

	return 0;

init_failed_dmx_release:
	dvb_dmx_release(&mpq_demux->demux);
init_failed:
	return result;
}

static int aml_dvb_dmx_init(struct aml_dvb *advb, struct aml_dmx *dmx, int id)
{
	int i, ret;
#ifndef CONFIG_OF
	struct resource *res;
	char buf[32];
#endif
	switch(id){
		case 0:
			dmx->dmx_irq = INT_DEMUX;
			break;
		case 1:
			dmx->dmx_irq = INT_DEMUX_1;
			break;
		case 2:
			dmx->dmx_irq = INT_DEMUX_2;
			break;
	}

#ifndef CONFIG_OF
	snprintf(buf, sizeof(buf), "demux%d_irq", id);
	res = platform_get_resource_byname(advb->pdev, IORESOURCE_IRQ, buf);
	if (res) {
		dmx->dmx_irq = res->start;
	}
#endif

	dmx->source  = -1;
	dmx->dump_ts_select = 0;
	dmx->dvr_irq = -1;

	dmx->demux.dmx.capabilities = (DMX_TS_FILTERING | DMX_SECTION_FILTERING | DMX_PES_FILTERING | DMX_MEMORY_BASED_FILTERING | DMX_TS_DESCRAMBLING);
	dmx->demux.filternum = dmx->demux.feednum = FILTER_COUNT;
	dmx->demux.priv = advb;
	dmx->demux.start_feed = aml_dmx_hw_start_feed;
	dmx->demux.stop_feed = aml_dmx_hw_stop_feed;
	dmx->demux.write_to_decoder = NULL;

	if ((ret = dvb_dmx_init(&dmx->demux)) < 0) {
		pr_error("dvb_dmx failed: error %d\n",ret);
		goto error_dmx_init;
	}

	dmx->dmxdev.filternum = dmx->demux.feednum;
	dmx->dmxdev.demux = &dmx->demux.dmx;
	dmx->dmxdev.capabilities = 0;
	if ((ret = dvb_dmxdev_init(&dmx->dmxdev, &advb->dvb_adapter)) < 0) {
		pr_error("dvb_dmxdev_init failed: error %d\n",ret);
		goto error_dmxdev_init;
	}

	for (i=0; i<DMX_DEV_COUNT; i++) {
		int source = i+DMX_FRONTEND_0;
		dmx->hw_fe[i].source = source;

		if ((ret = dmx->demux.dmx.add_frontend(&dmx->demux.dmx, &dmx->hw_fe[i])) < 0) {
			pr_error("adding hw_frontend to dmx failed: error %d",ret);
			dmx->hw_fe[i].source = 0;
			goto error_add_hw_fe;
		}
	}

	dmx->mem_fe.source = DMX_MEMORY_FE;
	if ((ret = dmx->demux.dmx.add_frontend(&dmx->demux.dmx, &dmx->mem_fe)) < 0) {
		pr_error("adding mem_frontend to dmx failed: error %d",ret);
		goto error_add_mem_fe;
	}

	if ((ret = dmx->demux.dmx.connect_frontend(&dmx->demux.dmx, &dmx->hw_fe[1])) < 0) {
		pr_error("connect frontend failed: error %d",ret);
		goto error_connect_fe;
	}

	dmx->id = id;
	dmx->aud_chan = -1;
	dmx->vid_chan = -1;
	dmx->sub_chan = -1;
	dmx->pcr_chan = -1;

	if ((ret = aml_dmx_hw_init(dmx)) <0) {
		pr_error("demux hw init error %d", ret);
		dmx->id = -1;
		goto error_dmx_hw_init;
	}

	dvb_net_init(&advb->dvb_adapter, &dmx->dvb_net, &dmx->demux.dmx);

	return 0;
error_dmx_hw_init:
error_connect_fe:
	dmx->demux.dmx.remove_frontend(&dmx->demux.dmx, &dmx->mem_fe);
error_add_mem_fe:
error_add_hw_fe:
	for (i=0; i<DMX_DEV_COUNT; i++) {
		if (dmx->hw_fe[i].source)
			dmx->demux.dmx.remove_frontend(&dmx->demux.dmx, &dmx->hw_fe[i]);
	}
	dvb_dmxdev_release(&dmx->dmxdev);
error_dmxdev_init:
	dvb_dmx_release(&dmx->demux);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
		saa716x_adap->demux.filternum		= 256;
		saa716x_adap->demux.feednum		= 256;
		saa716x_adap->demux.start_feed		= saa716x_dvb_start_feed;
		saa716x_adap->demux.stop_feed		= saa716x_dvb_stop_feed;
		saa716x_adap->demux.write_to_decoder	= NULL;

		dprintk(SAA716x_DEBUG, 1, "dvb_dmx_init");
		if ((result = dvb_dmx_init(&saa716x_adap->demux)) < 0) {
			dprintk(SAA716x_ERROR, 1, "dvb_dmx_init failed, ERROR=%d", result);
			goto err0;
		}

		saa716x_adap->dmxdev.filternum		= 256;
		saa716x_adap->dmxdev.demux		= &saa716x_adap->demux.dmx;
		saa716x_adap->dmxdev.capabilities	= 0;

		dprintk(SAA716x_DEBUG, 1, "dvb_dmxdev_init");
		if ((result = dvb_dmxdev_init(&saa716x_adap->dmxdev,
					      &saa716x_adap->dvb_adapter)) < 0) {

			dprintk(SAA716x_ERROR, 1, "dvb_dmxdev_init failed, ERROR=%d", result);
			goto err1;
		}

		saa716x_adap->fe_hw.source = DMX_FRONTEND_0;

		if ((result = saa716x_adap->demux.dmx.add_frontend(&saa716x_adap->demux.dmx,
								   &saa716x_adap->fe_hw)) < 0) {

			dprintk(SAA716x_ERROR, 1, "dvb_dmx_init failed, ERROR=%d", result);
			goto err2;
		}

		saa716x_adap->fe_mem.source = DMX_MEMORY_FE;

		if ((result = saa716x_adap->demux.dmx.add_frontend(&saa716x_adap->demux.dmx,
								   &saa716x_adap->fe_mem)) < 0) {
			dprintk(SAA716x_ERROR, 1, "dvb_dmx_init failed, ERROR=%d", result);
			goto err3;
		}

		if ((result = saa716x_adap->demux.dmx.connect_frontend(&saa716x_adap->demux.dmx,
								       &saa716x_adap->fe_hw)) < 0) {

			dprintk(SAA716x_ERROR, 1, "dvb_dmx_init failed, ERROR=%d", result);
			goto err4;
		}

		dvb_net_init(&saa716x_adap->dvb_adapter, &saa716x_adap->dvb_net, &saa716x_adap->demux.dmx);
//		tasklet_init(&saa716x_adap->tasklet, saa716x_dma_xfer, (unsigned long) saa716x);
		dprintk(SAA716x_DEBUG, 1, "Frontend Init");
		saa716x_adap->saa716x = saa716x;

		if (config->frontend_attach) {
			result = config->frontend_attach(saa716x_adap, i);
			if (result < 0)
				dprintk(SAA716x_ERROR, 1, "SAA716x frontend attach failed");

			if (saa716x_adap->fe == NULL) {
				dprintk(SAA716x_ERROR, 1, "A frontend driver was not found for [%04x:%04x] subsystem [%04x:%04x]\n",
					saa716x->pdev->vendor,
					saa716x->pdev->device,
					saa716x->pdev->subsystem_vendor,
					saa716x->pdev->subsystem_device);
			} else {
				result = dvb_register_frontend(&saa716x_adap->dvb_adapter, saa716x_adap->fe);
				if (result < 0) {
					dprintk(SAA716x_ERROR, 1, "SAA716x register frontend failed");
					goto err6;
				}
			}

		} else {
			dprintk(SAA716x_ERROR, 1, "Frontend attach = NULL");
		}

		saa716x_fgpi_init(saa716x, config->adap_config[i].ts_port);

		saa716x_adap++;
	}


	return 0;

	/* Error conditions */
err6:
	dvb_frontend_detach(saa716x_adap->fe);
err4:
	saa716x_adap->demux.dmx.remove_frontend(&saa716x_adap->demux.dmx, &saa716x_adap->fe_mem);
err3:
	saa716x_adap->demux.dmx.remove_frontend(&saa716x_adap->demux.dmx, &saa716x_adap->fe_hw);
err2:
	dvb_dmxdev_release(&saa716x_adap->dmxdev);
err1:
	dvb_dmx_release(&saa716x_adap->demux);
err0:
	dvb_unregister_adapter(&saa716x_adap->dvb_adapter);

	return result;
}