C++ pcmcia_release_configuration函数代码示例

static int prism2_cs_suspend(struct pcmcia_device *pdev)
{
	struct wlandevice  *wlandev;

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
        dev_link_t *link = dev_to_instance(pdev);
#endif

	DBFENTER;

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,16)
	wlandev = pdev->priv;
	prism2sta_ifstate(wlandev, P80211ENUM_ifstate_disable);
#else
	wlandev = link->priv;

        link->state |= DEV_SUSPEND;
        if (link->state & DEV_CONFIG) {
		prism2sta_ifstate(wlandev, P80211ENUM_ifstate_disable);
		pcmcia_release_configuration(link->handle);
	}
#endif

	DBFEXIT;

	return 0;
}

static int avmcs_event(event_t event, int priority,
			  event_callback_args_t *args)
{
    dev_link_t *link = args->client_data;

    switch (event) {
    case CS_EVENT_CARD_REMOVAL:
	link->state &= ~DEV_PRESENT;
	if (link->state & DEV_CONFIG)
		avmcs_release(link);
	break;
    case CS_EVENT_CARD_INSERTION:
	link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
	avmcs_config(link);
	break;
    case CS_EVENT_PM_SUSPEND:
	link->state |= DEV_SUSPEND;
	/* Fall through... */
    case CS_EVENT_RESET_PHYSICAL:
	if (link->state & DEV_CONFIG)
	    pcmcia_release_configuration(link->handle);
	break;
    case CS_EVENT_PM_RESUME:
	link->state &= ~DEV_SUSPEND;
	/* Fall through... */
    case CS_EVENT_CARD_RESET:
	if (link->state & DEV_CONFIG)
	    pcmcia_request_configuration(link->handle, &link->conf);
	break;
    }
    return 0;
} /* avmcs_event */

/*----------------------------------------------------------------
* prism2sta_release
*
* Half of the config/release pair.  Usually called in response to
* a card ejection event.  Checks to make sure no higher layers
* are still (or think they are) using the card via the link->open
* field.
*
* NOTE: Don't forget to increment the link->open variable in the
*  device_open method, and decrement it in the device_close
*  method.
*
* Arguments:
*	arg	a generic 32 bit variable.  It's the value that
*		we assigned to link->release.data in sta_attach().
*
* Returns:
*	nothing
*
* Side effects:
*	All resources should be released after this function
*	executes and finds the device !open.
*
* Call context:
*	Possibly in a timer context.  Don't do anything that'll
*	block.
----------------------------------------------------------------*/
void prism2sta_release(u_long arg)
{
        dev_link_t	*link = (dev_link_t *)arg;

	DBFENTER;

	/* First thing we should do is get the MSD back to the
	 * HWPRESENT state.  I.e. everything quiescent.
	 */
	prism2sta_ifstate(link->priv, P80211ENUM_ifstate_disable);

        if (link->open) {
		/* TODO: I don't think we're even using this bit of code
		 * and I don't think it's hurting us at the moment.
		 */
                WLAN_LOG_DEBUG(1,
			"prism2sta_cs: release postponed, '%s' still open\n",
			link->dev->dev_name);
                link->state |= DEV_STALE_CONFIG;
                return;
        }

        pcmcia_release_configuration(link->handle);
        pcmcia_release_io(link->handle, &link->io);
        pcmcia_release_irq(link->handle, &link->irq);

        link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING);

	DBFEXIT;
}

void ide_release(dev_link_t *link)
{
    ide_info_t *info = link->priv;
    
    DEBUG(0, "ide_release(0x%p)\n", link);

    if (info->ndev) {
	/* FIXME: if this fails we need to queue the cleanup somehow
	   -- need to investigate the required PCMCIA magic */
	ide_unregister(info->hd);
	/* deal with brain dead IDE resource management */
	request_region(link->io.BasePort1, link->io.NumPorts1,
		       info->node.dev_name);
	if (link->io.NumPorts2)
	    request_region(link->io.BasePort2, link->io.NumPorts2,
			   info->node.dev_name);
    }
    info->ndev = 0;
    link->dev = NULL;
    
    pcmcia_release_configuration(link->handle);
    pcmcia_release_io(link->handle, &link->io);
    pcmcia_release_irq(link->handle, &link->irq);
    
    link->state &= ~DEV_CONFIG;

} /* ide_release */

static void serial_remove(dev_link_t *link)
{
	struct serial_info *info = link->priv;
	int i;

	link->state &= ~DEV_PRESENT;

	DEBUG(0, "serial_release(0x%p)\n", link);

	/*
	 * Recheck to see if the device is still configured.
	 */
	if (info->link.state & DEV_CONFIG) {
		for (i = 0; i < info->ndev; i++)
			serial8250_unregister_port(info->line[i]);

		info->link.dev = NULL;

		if (!info->slave) {
			pcmcia_release_configuration(info->link.handle);
			pcmcia_release_io(info->link.handle, &info->link.io);
			pcmcia_release_irq(info->link.handle, &info->link.irq);
		}

		info->link.state &= ~DEV_CONFIG;
	}
}

static void sl811_cs_release(dev_link_t * link)
{

	DBG(0, "sl811_cs_release(0x%p)\n", link);

	if (link->open) {
		DBG(1, "sl811_cs: release postponed, '%s' still open\n",
		    link->dev->dev_name);
		link->state |= DEV_STALE_CONFIG;
		return;
	}

	/* Unlink the device chain */
	link->dev = NULL;

	platform_device_unregister(&platform_dev);
	pcmcia_release_configuration(link->handle);
	if (link->io.NumPorts1)
		pcmcia_release_io(link->handle, &link->io);
	if (link->irq.AssignedIRQ)
		pcmcia_release_irq(link->handle, &link->irq);
	link->state &= ~DEV_CONFIG;

	if (link->state & DEV_STALE_LINK)
		sl811_cs_detach(link);
}

static int ixj_suspend(struct pcmcia_device *dev)
{
	dev_link_t *link = dev_to_instance(dev);

	link->state |= DEV_SUSPEND;
	if (link->state & DEV_CONFIG)
		pcmcia_release_configuration(link->handle);

	return 0;
}

static void ixj_cs_release(dev_link_t *link)
{
	ixj_info_t *info = link->priv;
	DEBUG(0, "ixj_cs_release(0x%p)\n", link);
	info->ndev = 0;
	link->dev = NULL;
	pcmcia_release_configuration(link->handle);
	pcmcia_release_io(link->handle, &link->io);
	link->state &= ~DEV_CONFIG;
}

static void vxpocket_release(dev_link_t *link)
{
	if (link->state & DEV_CONFIG) {
		/* release cs resources */
		pcmcia_release_configuration(link->handle);
		pcmcia_release_io(link->handle, &link->io);
		pcmcia_release_irq(link->handle, &link->irq);
		link->state &= ~DEV_CONFIG;
	}
}

/* ----------------------------------------------------------------------------
nmclan_release
	After a card is removed, nmclan_release() will unregister the
	net device, and release the PCMCIA configuration.  If the device
	is still open, this will be postponed until it is closed.
---------------------------------------------------------------------------- */
static void nmclan_release(dev_link_t *link)
{

  DEBUG(0, "nmclan_release(0x%p)\n", link);

  pcmcia_release_configuration(link->handle);
  pcmcia_release_io(link->handle, &link->io);
  pcmcia_release_irq(link->handle, &link->irq);

  link->state &= ~DEV_CONFIG;
}

static void prism2_cs_remove(struct pcmcia_device *pdev)
{
	struct wlandevice  *wlandev;

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
        dev_link_t *link = dev_to_instance(pdev);
#endif

	DBFENTER;

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,16)
	wlandev = pdev->priv;
#else
	wlandev = link->priv;
#endif

	if (wlandev) {
		p80211netdev_hwremoved(wlandev);
		unregister_wlandev(wlandev);
		wlan_unsetup(wlandev);
		if (wlandev->priv) {
			hfa384x_t *hw = wlandev->priv;
			wlandev->priv = NULL;
			if (hw) {
				hfa384x_destroy(hw);
				kfree(hw);
			}
		}
		kfree(wlandev);
	}

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,16)
	pdev->priv = NULL;
        pcmcia_disable_device(pdev);
#else
        if (link->state & DEV_CONFIG) {
	        if (link->win)
			pcmcia_release_window(link->win);
		pcmcia_release_configuration(link->handle);
		if (link->io.NumPorts1)
			pcmcia_release_io(link->handle, &link->io);
		if (link->irq.AssignedIRQ)
			pcmcia_release_irq(link->handle, &link->irq);

		link->state &= ~DEV_CONFIG;
	}

	link->priv = NULL;
	kfree(link);
#endif

	DBFEXIT;
	return;
}

static void pdacf_config(dev_link_t *link)
{
	client_handle_t handle = link->handle;
	struct snd_pdacf *pdacf = link->priv;
	tuple_t tuple;
	cisparse_t *parse = NULL;
	config_info_t conf;
	u_short buf[32];
	int last_fn, last_ret;

	snd_printdd(KERN_DEBUG "pdacf_config called\n");
	parse = kmalloc(sizeof(*parse), GFP_KERNEL);
	if (! parse) {
		snd_printk(KERN_ERR "pdacf_config: cannot allocate\n");
		return;
	}
	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
	tuple.Attributes = 0;
	tuple.TupleData = (cisdata_t *)buf;
	tuple.TupleDataMax = sizeof(buf);
	tuple.TupleOffset = 0;
	tuple.DesiredTuple = CISTPL_CONFIG;
	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
	CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
	CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, parse));
	link->conf.ConfigBase = parse->config.base;
	link->conf.ConfigIndex = 0x5;
	kfree(parse);

	CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
	link->conf.Vcc = conf.Vcc;

	/* Configure card */
	link->state |= DEV_CONFIG;

	CS_CHECK(RequestIO, pcmcia_request_io(handle, &link->io));
	CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
	CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));

	if (snd_pdacf_assign_resources(pdacf, link->io.BasePort1, link->irq.AssignedIRQ) < 0)
		goto failed;

	link->dev = &pdacf->node;
	link->state &= ~DEV_CONFIG_PENDING;
	return;

cs_failed:
	cs_error(link->handle, last_fn, last_ret);
failed:
	pcmcia_release_configuration(link->handle);
	pcmcia_release_io(link->handle, &link->io);
	pcmcia_release_irq(link->handle, &link->irq);
}

static int elsa_suspend(struct pcmcia_device *p_dev)
{
	dev_link_t *link = dev_to_instance(p_dev);
	local_info_t *dev = link->priv;

	link->state |= DEV_SUSPEND;
        dev->busy = 1;
	if (link->state & DEV_CONFIG)
		pcmcia_release_configuration(link->handle);

	return 0;
}

/*
 * event callback
 */
static int vxpocket_event(event_t event, int priority, event_callback_args_t *args)
{
	dev_link_t *link = args->client_data;
	vx_core_t *chip = link->priv;

	switch (event) {
	case CS_EVENT_CARD_REMOVAL:
		snd_printdd(KERN_DEBUG "CARD_REMOVAL..\n");
		link->state &= ~DEV_PRESENT;
		if (link->state & DEV_CONFIG)
			chip->chip_status |= VX_STAT_IS_STALE;
		break;
	case CS_EVENT_CARD_INSERTION:
		snd_printdd(KERN_DEBUG "CARD_INSERTION..\n");
		link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
		vxpocket_config(link);
		break;
#ifdef CONFIG_PM
	case CS_EVENT_PM_SUSPEND:
		snd_printdd(KERN_DEBUG "SUSPEND\n");
		link->state |= DEV_SUSPEND;
		if (chip && chip->card->pm_suspend) {
			snd_printdd(KERN_DEBUG "snd_vx_suspend calling\n");
			chip->card->pm_suspend(chip->card, PMSG_SUSPEND);
		}
		/* Fall through... */
	case CS_EVENT_RESET_PHYSICAL:
		snd_printdd(KERN_DEBUG "RESET_PHYSICAL\n");
		if (link->state & DEV_CONFIG)
			pcmcia_release_configuration(link->handle);
		break;
	case CS_EVENT_PM_RESUME:
		snd_printdd(KERN_DEBUG "RESUME\n");
		link->state &= ~DEV_SUSPEND;
		/* Fall through... */
	case CS_EVENT_CARD_RESET:
		snd_printdd(KERN_DEBUG "CARD_RESET\n");
		if (DEV_OK(link)) {
			//struct snd_vxpocket *vxp = (struct snd_vxpocket *)chip;
			snd_printdd(KERN_DEBUG "requestconfig...\n");
			pcmcia_request_configuration(link->handle, &link->conf);
			if (chip && chip->card->pm_resume) {
				snd_printdd(KERN_DEBUG "calling snd_vx_resume\n");
				chip->card->pm_resume(chip->card);
			}
		}
		snd_printdd(KERN_DEBUG "resume done!\n");
		break;
#endif
	}
	return 0;
}

static void aha152x_release_cs(dev_link_t *link)
{
	scsi_info_t *info = link->priv;

	aha152x_release(info->host);
	link->dev = NULL;
    
	pcmcia_release_configuration(link->handle);
	pcmcia_release_io(link->handle, &link->io);
	pcmcia_release_irq(link->handle, &link->irq);
    
	link->state &= ~DEV_CONFIG;
}