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/*
* ---------------------------------------------------------------------------
* FILE: sdio_events.c
*
* PURPOSE:
* Process the events received by the SDIO glue layer.
* Optional part of the porting exercise.
*
* Copyright (C) 2009 by Cambridge Silicon Radio Ltd.
*
* Refer to LICENSE.txt included with this source code for details on
* the license terms.
*
* ---------------------------------------------------------------------------
*/
#include "unifi_priv.h"
/*
* Porting Notes:
* There are two ways to support the suspend/resume system events in a driver.
* In some operating systems these events are delivered to the OS driver
* directly from the system. In this case, the OS driver needs to pass these
* events to the API described in the CSR SDIO Abstration API document.
* In Linux, and other embedded operating systems, the suspend/resume events
* come from the SDIO driver. In this case, simply get these events in the
* SDIO glue layer and notify the OS layer.
*
* In either case, typically, the events are processed by the SME.
* Use the unifi_sys_suspend_ind() and unifi_sys_resume_ind() to pass
* the events to the SME.
*/
/*
* ---------------------------------------------------------------------------
* unifi_suspend
*
* Handles a suspend request from the SDIO driver.
*
* Arguments:
* ospriv Pointer to OS driver context.
*
* ---------------------------------------------------------------------------
*/
void unifi_suspend(void *ospriv)
{
unifi_priv_t *priv = ospriv;
int interfaceTag=0;
/* For powered suspend, tell the resume's wifi_on() not to reinit UniFi */
priv->wol_suspend = (enable_wol == UNIFI_WOL_OFF) ? FALSE : TRUE;
unifi_trace(priv, UDBG1, "unifi_suspend: wol_suspend %d, enable_wol %d",
priv->wol_suspend, enable_wol );
/* Stop network traffic. */
/* need to stop all the netdevices*/
for( interfaceTag=0;interfaceTag<CSR_WIFI_NUM_INTERFACES;interfaceTag++)
{
netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];
if (interfacePriv->netdev_registered == 1)
{
if( priv->wol_suspend ) {
unifi_trace(priv, UDBG1, "unifi_suspend: Don't netif_carrier_off");
} else {
unifi_trace(priv, UDBG1, "unifi_suspend: netif_carrier_off");
netif_carrier_off(priv->netdev[interfaceTag]);
}
netif_tx_stop_all_queues(priv->netdev[interfaceTag]);
}
}
unifi_trace(priv, UDBG1, "unifi_suspend: suspend SME");
sme_sys_suspend(priv);
} /* unifi_suspend() */
/*
* ---------------------------------------------------------------------------
* unifi_resume
*
* Handles a resume request from the SDIO driver.
*
* Arguments:
* ospriv Pointer to OS driver context.
*
* ---------------------------------------------------------------------------
*/
void unifi_resume(void *ospriv)
{
unifi_priv_t *priv = ospriv;
int interfaceTag=0;
int r;
int wol = priv->wol_suspend;
unifi_trace(priv, UDBG1, "unifi_resume: resume SME, enable_wol=%d", enable_wol);
/* The resume causes wifi-on which will re-enable the BH and reinstall the ISR */
r = sme_sys_resume(priv);
if (r) {
unifi_error(priv, "Failed to resume UniFi\n");
}
/* Resume the network interfaces. For the cold resume case, this will
* happen upon reconnection.
*/
if (wol) {
unifi_trace(priv, UDBG1, "unifi_resume: try to enable carrier");
/* need to start all the netdevices*/
for( interfaceTag=0;interfaceTag<CSR_WIFI_NUM_INTERFACES;interfaceTag++) {
netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];
unifi_trace(priv, UDBG1, "unifi_resume: interfaceTag %d netdev_registered %d mode %d\n",
interfaceTag, interfacePriv->netdev_registered, interfacePriv->interfaceMode);
if (interfacePriv->netdev_registered == 1)
{
netif_carrier_on(priv->netdev[interfaceTag]);
netif_tx_start_all_queues(priv->netdev[interfaceTag]);
}
}
/* Kick the BH thread (with reason=host) to poll for data that may have
* arrived during a powered suspend. This caters for the case where the SME
* doesn't interact with the chip (e.g install autonomous scans) during resume.
*/
unifi_send_signal(priv->card, NULL, 0, NULL);
}
} /* unifi_resume() */
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