1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/staging/csr/sdio_events.c b/drivers/staging/csr/sdio_events.c
new file mode 100644
index 000000000000..6892c2e281bc
--- /dev/null
+++ b/drivers/staging/csr/sdio_events.c
@@ -0,0 +1,134 @@
+/*
+ * ---------------------------------------------------------------------------
+ * 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]);
+            }
+            UF_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]);
+                UF_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() */
+