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Message-Id: <200706031237.36773.rjw@sisk.pl>
Date: Sun, 3 Jun 2007 12:37:35 +0200
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: "linux-pm" <linux-pm@...ts.osdl.org>
Cc: netdev@...r.kernel.org, Valerie Henson <val@....edu>,
Nigel Cunningham <nigel@...el.suspend2.net>,
Pavel Machek <pavel@....cz>, Peer Chen <peer.chen@....com.tw>
Subject: [RFC][PATCH] Add suspend and resume support to uli526x
From: Rafael J. Wysocki <rjw@...k.pl>
Add suspend/resume support to the uli526x network driver (tested on x86_64,
with 'Ethernet controller: ALi Corporation M5263 Ethernet Controller, rev 40').
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
drivers/net/tulip/uli526x.c | 120 ++++++++++++++++++++++++++++++++++++++------
1 file changed, 105 insertions(+), 15 deletions(-)
Index: linux-2.6.22-rc3/drivers/net/tulip/uli526x.c
===================================================================
--- linux-2.6.22-rc3.orig/drivers/net/tulip/uli526x.c 2007-06-03 12:10:41.000000000 +0200
+++ linux-2.6.22-rc3/drivers/net/tulip/uli526x.c 2007-06-03 12:14:33.000000000 +0200
@@ -220,6 +220,10 @@ static int mode = 8;
static int uli526x_open(struct net_device *);
static int uli526x_start_xmit(struct sk_buff *, struct net_device *);
static int uli526x_stop(struct net_device *);
+#ifdef CONFIG_PM
+static int uli526x_suspend(struct pci_dev *pdev, pm_message_t state);
+static int uli526x_resume(struct pci_dev *pdev);
+#endif
static struct net_device_stats * uli526x_get_stats(struct net_device *);
static void uli526x_set_filter_mode(struct net_device *);
static const struct ethtool_ops netdev_ethtool_ops;
@@ -425,21 +429,14 @@ static void __devexit uli526x_remove_one
/*
- * Open the interface.
- * The interface is opened whenever "ifconfig" activates it.
+ * Bring the interface up.
+ * Used by uli526x_open and uli526x_resume.
*/
-static int uli526x_open(struct net_device *dev)
+static void uli526x_up(struct net_device *dev)
{
- int ret;
struct uli526x_board_info *db = netdev_priv(dev);
- ULI526X_DBUG(0, "uli526x_open", 0);
-
- ret = request_irq(dev->irq, &uli526x_interrupt, IRQF_SHARED, dev->name, dev);
- if (ret)
- return ret;
-
/* system variable init */
db->cr6_data = CR6_DEFAULT | uli526x_cr6_user_set;
db->tx_packet_cnt = 0;
@@ -467,7 +464,25 @@ static int uli526x_open(struct net_devic
db->timer.data = (unsigned long)dev;
db->timer.function = &uli526x_timer;
add_timer(&db->timer);
+}
+
+
+/*
+ * Open the interface.
+ * The interface is opened whenever "ifconfig" activates it.
+ */
+static int uli526x_open(struct net_device *dev)
+{
+ int ret;
+
+ ULI526X_DBUG(0, "uli526x_open", 0);
+
+ ret = request_irq(dev->irq, &uli526x_interrupt, IRQF_SHARED, dev->name, dev);
+ if (ret)
+ return ret;
+
+ uli526x_up(dev);
return 0;
}
@@ -613,17 +628,15 @@ static int uli526x_start_xmit(struct sk_
/*
- * Stop the interface.
- * The interface is stopped when it is brought.
+ * Take the interface down.
+ * Used by uli526x_stop and uli526x_suspend.
*/
-static int uli526x_stop(struct net_device *dev)
+static void uli526x_down(struct net_device *dev)
{
struct uli526x_board_info *db = netdev_priv(dev);
unsigned long ioaddr = dev->base_addr;
- ULI526X_DBUG(0, "uli526x_stop", 0);
-
/* disable system */
netif_stop_queue(dev);
@@ -634,6 +647,21 @@ static int uli526x_stop(struct net_devic
outl(ULI526X_RESET, ioaddr + DCR0);
udelay(5);
phy_write(db->ioaddr, db->phy_addr, 0, 0x8000, db->chip_id);
+}
+
+
+/*
+ * Stop the interface.
+ * The interface is stopped when it is brought.
+ */
+
+static int uli526x_stop(struct net_device *dev)
+{
+ struct uli526x_board_info *db = netdev_priv(dev);
+
+ ULI526X_DBUG(0, "uli526x_stop", 0);
+
+ uli526x_down(dev);
/* free interrupt */
free_irq(dev->irq, dev);
@@ -654,6 +682,64 @@ static int uli526x_stop(struct net_devic
}
+#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);
+
+ ULI526X_DBUG(0, "uli526x_suspend", 0);
+
+ if (dev && netdev_priv(dev)) {
+ if (netif_running(dev)) {
+ netif_device_detach(dev);
+ uli526x_down(dev);
+ }
+ pci_save_state(pdev);
+ pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ }
+ return 0;
+}
+
+/*
+ * Resume the interface.
+ */
+
+static int uli526x_resume(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ struct uli526x_board_info *db = netdev_priv(dev);
+ int err;
+
+ ULI526X_DBUG(0, "uli526x_resume", 0);
+
+ if (dev && db) {
+ pci_set_power_state(pdev, PCI_D0);
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_WARNING "%s: Could not enable device \n",
+ dev->name);
+ return err;
+ }
+ pci_restore_state(pdev);
+ pci_set_master(pdev);
+ if (netif_running(dev)) {
+ uli526x_up(dev);
+ netif_device_attach(dev);
+ }
+ }
+ return 0;
+}
+
+#endif /* CONFIG_PM */
+
+
/*
* M5261/M5263 insterrupt handler
* receive the packet to upper layer, free the transmitted packet
@@ -1689,6 +1775,10 @@ static struct pci_driver uli526x_driver
.id_table = uli526x_pci_tbl,
.probe = uli526x_init_one,
.remove = __devexit_p(uli526x_remove_one),
+#ifdef CONFIG_PM
+ .suspend = uli526x_suspend,
+ .resume = uli526x_resume,
+#endif
};
MODULE_AUTHOR("Peer Chen, peer.chen@....com.tw");
-
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