ucc_geth: Implement suspend/resume and Wake-On-LAN support
This patch implements suspend/resume and WOL support for UCC Ethernet
driver.
We support two wake up events: wake on PHY/link changes and wake
on magic packet.
In some CPUs (like MPC8569) QE shuts down during sleep, so magic packet
detection is unusable, and also on resume we should fully reinitialize
UCC structures.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index d2ca61d..7fb96f3 100644
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -3497,6 +3497,10 @@
napi_enable(&ugeth->napi);
netif_start_queue(dev);
+ device_set_wakeup_capable(&dev->dev,
+ qe_alive_during_sleep() || ugeth->phydev->irq);
+ device_set_wakeup_enable(&dev->dev, ugeth->wol_en);
+
return err;
err:
@@ -3561,6 +3565,85 @@
schedule_work(&ugeth->timeout_work);
}
+
+#ifdef CONFIG_PM
+
+static int ucc_geth_suspend(struct of_device *ofdev, pm_message_t state)
+{
+ struct net_device *ndev = dev_get_drvdata(&ofdev->dev);
+ struct ucc_geth_private *ugeth = netdev_priv(ndev);
+
+ if (!netif_running(ndev))
+ return 0;
+
+ napi_disable(&ugeth->napi);
+
+ /*
+ * Disable the controller, otherwise we'll wakeup on any network
+ * activity.
+ */
+ ugeth_disable(ugeth, COMM_DIR_RX_AND_TX);
+
+ if (ugeth->wol_en & WAKE_MAGIC) {
+ setbits32(ugeth->uccf->p_uccm, UCC_GETH_UCCE_MPD);
+ setbits32(&ugeth->ug_regs->maccfg2, MACCFG2_MPE);
+ ucc_fast_enable(ugeth->uccf, COMM_DIR_RX_AND_TX);
+ } else if (!(ugeth->wol_en & WAKE_PHY)) {
+ phy_stop(ugeth->phydev);
+ }
+
+ return 0;
+}
+
+static int ucc_geth_resume(struct of_device *ofdev)
+{
+ struct net_device *ndev = dev_get_drvdata(&ofdev->dev);
+ struct ucc_geth_private *ugeth = netdev_priv(ndev);
+ int err;
+
+ if (!netif_running(ndev))
+ return 0;
+
+ if (qe_alive_during_sleep()) {
+ if (ugeth->wol_en & WAKE_MAGIC) {
+ ucc_fast_disable(ugeth->uccf, COMM_DIR_RX_AND_TX);
+ clrbits32(&ugeth->ug_regs->maccfg2, MACCFG2_MPE);
+ clrbits32(ugeth->uccf->p_uccm, UCC_GETH_UCCE_MPD);
+ }
+ ugeth_enable(ugeth, COMM_DIR_RX_AND_TX);
+ } else {
+ /*
+ * Full reinitialization is required if QE shuts down
+ * during sleep.
+ */
+ ucc_geth_memclean(ugeth);
+
+ err = ucc_geth_init_mac(ugeth);
+ if (err) {
+ ugeth_err("%s: Cannot initialize MAC, aborting.",
+ ndev->name);
+ return err;
+ }
+ }
+
+ ugeth->oldlink = 0;
+ ugeth->oldspeed = 0;
+ ugeth->oldduplex = -1;
+
+ phy_stop(ugeth->phydev);
+ phy_start(ugeth->phydev);
+
+ napi_enable(&ugeth->napi);
+ netif_start_queue(ndev);
+
+ return 0;
+}
+
+#else
+#define ucc_geth_suspend NULL
+#define ucc_geth_resume NULL
+#endif
+
static phy_interface_t to_phy_interface(const char *phy_connection_type)
{
if (strcasecmp(phy_connection_type, "mii") == 0)
@@ -3852,6 +3935,8 @@
.match_table = ucc_geth_match,
.probe = ucc_geth_probe,
.remove = ucc_geth_remove,
+ .suspend = ucc_geth_suspend,
+ .resume = ucc_geth_resume,
};
static int __init ucc_geth_init(void)