uli526x: Add suspend and resume routines (updated)

Add suspend/resume support to the uli526x network driver (tested on x86_64,
with 'Ethernet controller: ALi Corporation M5263 Ethernet Controller, rev 40').

This patch is based on the suspend/resume code in the tg3 driver.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 102 insertions, 6 deletions

diff --git a/drivers/net/tulip/uli526x.c b/drivers/net/tulip/uli526x.c
index ca2548eb7d63..e26ce44561c4 100644
--- a/drivers/net/tulip/uli526x.c
+++ b/drivers/net/tulip/uli526x.c
@@ -1110,19 +1110,15 @@ static void uli526x_timer(unsigned long data)
 
 
 /*
- *      Dynamic reset the ULI526X board
  *      Stop ULI526X board
  *      Free Tx/Rx allocated memory
- *      Reset ULI526X board
- *      Re-initialize ULI526X board
+ *      Init system variable
  */
 
-static void uli526x_dynamic_reset(struct net_device *dev)
+static void uli526x_reset_prepare(struct net_device *dev)
 {
         struct uli526x_board_info *db = netdev_priv(dev);
 
-        ULI526X_DBUG(0, "uli526x_dynamic_reset()", 0);
-
         /* Sopt MAC controller */
         db->cr6_data &= ~(CR6_RXSC | CR6_TXSC); /* Disable Tx/Rx */
         update_cr6(db->cr6_data, dev->base_addr);
@@ -1141,6 +1137,22 @@ static void uli526x_dynamic_reset(struct net_device *dev)
         db->link_failed = 1;
         db->init=1;
         db->wait_reset = 0;
+}
+
+
+/*
+ *      Dynamic reset the ULI526X board
+ *      Stop ULI526X board
+ *      Free Tx/Rx allocated memory
+ *      Reset ULI526X board
+ *      Re-initialize ULI526X board
+ */
+
+static void uli526x_dynamic_reset(struct net_device *dev)
+{
+        ULI526X_DBUG(0, "uli526x_dynamic_reset()", 0);
+
+        uli526x_reset_prepare(dev);
 
         /* Re-initialize ULI526X board */
         uli526x_init(dev);
@@ -1150,6 +1162,88 @@ static void uli526x_dynamic_reset(struct net_device *dev)
 }
 
 
+#ifdef CONFIG_PM
+
+/*
+ *      Suspend the interface.
+ */
+
+static int uli526x_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+        struct net_device *dev = pci_get_drvdata(pdev);
+        pci_power_t power_state;
+        int err;
+
+        ULI526X_DBUG(0, "uli526x_suspend", 0);
+
+        if (!netdev_priv(dev))
+                return 0;
+
+        pci_save_state(pdev);
+
+        if (!netif_running(dev))
+                return 0;
+
+        netif_device_detach(dev);
+        uli526x_reset_prepare(dev);
+
+        power_state = pci_choose_state(pdev, state);
+        pci_enable_wake(pdev, power_state, 0);
+        err = pci_set_power_state(pdev, power_state);
+        if (err) {
+                netif_device_attach(dev);
+                /* Re-initialize ULI526X board */
+                uli526x_init(dev);
+                /* Restart upper layer interface */
+                netif_wake_queue(dev);
+        }
+
+        return err;
+}
+
+/*
+ *      Resume the interface.
+ */
+
+static int uli526x_resume(struct pci_dev *pdev)
+{
+        struct net_device *dev = pci_get_drvdata(pdev);
+        int err;
+
+        ULI526X_DBUG(0, "uli526x_resume", 0);
+
+        if (!netdev_priv(dev))
+                return 0;
+
+        pci_restore_state(pdev);
+
+        if (!netif_running(dev))
+                return 0;
+
+        err = pci_set_power_state(pdev, PCI_D0);
+        if (err) {
+                printk(KERN_WARNING "%s: Could not put device into D0\n",
+                        dev->name);
+                return err;
+        }
+
+        netif_device_attach(dev);
+        /* Re-initialize ULI526X board */
+        uli526x_init(dev);
+        /* Restart upper layer interface */
+        netif_wake_queue(dev);
+
+        return 0;
+}
+
+#else /* !CONFIG_PM */
+
+#define uli526x_suspend NULL
+#define uli526x_resume  NULL
+
+#endif /* !CONFIG_PM */
+
+
 /*
  *      free all allocated rx buffer
  */
@@ -1689,6 +1783,8 @@ static struct pci_driver uli526x_driver = {
         .id_table       = uli526x_pci_tbl,
         .probe          = uli526x_init_one,
         .remove         = __devexit_p(uli526x_remove_one),
+        .suspend        = uli526x_suspend,
+        .resume         = uli526x_resume,
 };
 
 MODULE_AUTHOR("Peer Chen, peer.chen@uli.com.tw");