/* suspend/resume wrappers calling both usbnet and the cdc-wdm
* subdriver if present.
*
* NOTE: cdc-wdm also supports pre/post_reset, but we cannot provide
* wrappers for those without adding usbnet reset support first.
*/
static int qmi_wwan_suspend(struct usb_interface *intf, pm_message_t message)
{
struct usbnet *dev = usb_get_intfdata(intf);
struct qmi_wwan_state *info = (void *)&dev->data;
int ret;
/* Both usbnet_suspend() and subdriver->suspend() MUST return 0
* in system sleep context, otherwise, the resume callback has
* to recover device from previous suspend failure.
*/
ret = usbnet_suspend(intf, message);
if (ret < 0)
goto err;
if (intf == info->control && info->subdriver &&
info->subdriver->suspend)
ret = info->subdriver->suspend(intf, message);
if (ret < 0)
usbnet_resume(intf);
err:
return ret;
}
static int rmnet_usb_suspend(struct usb_interface *iface, pm_message_t message)
{
struct usbnet *unet;
struct rmnet_ctrl_dev *dev;
char *suspended[2] = {"QMI_STATE=SUSPENDED", NULL};
unet = usb_get_intfdata(iface);
dev = (struct rmnet_ctrl_dev *)unet->data[1];
if (work_busy(&dev->get_encap_work))
return -EBUSY;
if (usbnet_suspend(iface, message))
return -EBUSY;
usb_kill_anchored_urbs(&dev->rx_submitted);
kobject_uevent_env(&dev->devicep->kobj, KOBJ_CHANGE,
suspended);
return 0;
}
static int cdc_mbim_suspend(struct usb_interface *intf, pm_message_t message)
{
int ret = 0;
struct usbnet *dev = usb_get_intfdata(intf);
struct cdc_mbim_state *info = (void *)&dev->data;
struct cdc_ncm_ctx *ctx = info->ctx;
if (ctx == NULL) {
ret = -1;
goto error;
}
ret = usbnet_suspend(intf, message);
if (ret < 0)
goto error;
if (intf == ctx->control && info->subdriver && info->subdriver->suspend)
ret = info->subdriver->suspend(intf, message);
if (ret < 0)
usbnet_resume(intf);
error:
return ret;
}
/*===========================================================================
METHOD:
GobiNetSuspend (Public Method)
DESCRIPTION:
Stops QMI traffic while device is suspended
PARAMETERS
pIntf [ I ] - Pointer to interface
powerEvent [ I ] - Power management event
RETURN VALUE:
int - 0 for success
negative errno for failure
===========================================================================*/
int GobiNetSuspend(
struct usb_interface * pIntf,
pm_message_t powerEvent )
{
struct usbnet * pDev;
sGobiUSBNet * pGobiDev;
if (pIntf == 0)
{
return -ENOMEM;
}
#if (LINUX_VERSION_CODE > KERNEL_VERSION( 2,6,23 ))
pDev = usb_get_intfdata( pIntf );
#else
pDev = (struct usbnet *)pIntf->dev.platform_data;
#endif
if (pDev == NULL || pDev->net == NULL)
{
DBG( "failed to get netdevice\n" );
return -ENXIO;
}
pGobiDev = (sGobiUSBNet *)pDev->data[0];
if (pGobiDev == NULL)
{
DBG( "failed to get QMIDevice\n" );
return -ENXIO;
}
// Is this autosuspend or system suspend?
// do we allow remote wakeup?
#if (LINUX_VERSION_CODE < KERNEL_VERSION( 2,6,33 ))
if (pDev->udev->auto_pm == 0)
#else
if ((powerEvent.event & PM_EVENT_AUTO) == 0)
#endif
{
DBG( "device suspended to power level %d\n",
powerEvent.event );
GobiSetDownReason( pGobiDev, DRIVER_SUSPENDED );
}
else
{
DBG( "device autosuspend\n" );
}
if (powerEvent.event & PM_EVENT_SUSPEND)
{
// Stop QMI read callbacks
KillRead( pGobiDev );
pDev->udev->reset_resume = 0;
// Store power state to avoid duplicate resumes
pIntf->dev.power.power_state.event = powerEvent.event;
}
else
{
// Other power modes cause QMI connection to be lost
pDev->udev->reset_resume = 1;
}
// Run usbnet's suspend function
return usbnet_suspend( pIntf, powerEvent );
}