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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-08-27 07:35:57 +0000
committerDavid S. Miller <davem@davemloft.net>2009-08-30 21:51:47 -0700
commit2394905f67aeec5f9452f2881cbeb2b42009de0e (patch)
tree799de0b229027408b0f894cb9f50e36f4707f3d7 /drivers/net/ucc_geth.c
parentbf5aec2e79418adb42f1457152b427fd3d6316d9 (diff)
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>
Diffstat (limited to 'drivers/net/ucc_geth.c')
-rw-r--r--drivers/net/ucc_geth.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index d2ca61d3dff..7fb96f33bad 100644
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -3497,6 +3497,10 @@ static int ucc_geth_open(struct net_device *dev)
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 @@ static void ucc_geth_timeout(struct net_device *dev)
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 @@ static struct of_platform_driver ucc_geth_driver = {
.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)