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Subject[PATCH] 3c509 Power Management
This only works on 3c509B and 3c589B but the PM command frobbing doesn't 
do any harm on unsupported cards (stated in the datasheet). Patch tested
on a 3c509B Combo (AUI/BNC/UTP). I was gonna add the auto idle code too
but then it would require adding more code in the ISR, if someone whines
loud enough i can do it though.

have a heart, sometimes that old router box needs a timeout too ;)

Zwane

--- linux-2.4-test/drivers/net/3c509.c.orig Fri Mar 1 08:21:29 2002
+++ linux-2.4-test/drivers/net/3c509.c Fri Mar 1 08:22:20 2002
@@ -45,11 +45,13 @@
- Reviewed against 1.18 from scyld.com
v1.18a 17Nov2001 Jeff Garzik <jgarzik@mandrakesoft.com>
- ethtool support
+ v1.18b 1Mar2002 Zwane Mwaikambo <zwane@commfireservices.com>
+ - Power Management support
*/

#define DRV_NAME "3c509"
-#define DRV_VERSION "1.18a"
-#define DRV_RELDATE "17Nov2001"
+#define DRV_VERSION "1.18b"
+#define DRV_RELDATE "1Mar2002"

/* A few values that may be tweaked. */

@@ -82,8 +84,9 @@
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/irq.h>
+#include <linux/pm.h>

-static char versionA[] __initdata = DRV_NAME ".c:" DRV_VERSION " " DRV_RELDATE "becker@scyld.com\n";
+static char versionA[] __initdata = DRV_NAME ".c:" DRV_VERSION " " DRV_RELDATE " becker@scyld.com\n";
static char versionB[] __initdata = "http://www.scyld.com/network/3c509.html\n";

#ifdef EL3_DEBUG
@@ -152,6 +155,9 @@
int head, size;
struct sk_buff *queue[SKB_QUEUE_SIZE];
char mca_slot;
+#ifdef CONFIG_PM
+ struct pm_dev *pmdev;
+#endif
};
static int id_port __initdata = 0x110; /* Start with 0x110 to avoid new sound cards.*/
static struct net_device *el3_root_dev;
@@ -168,6 +174,13 @@
static void set_multicast_list(struct net_device *dev);
static void el3_tx_timeout (struct net_device *dev);
static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
+static void el3_down(struct net_device *dev);
+static void el3_up(struct net_device *dev);
+#ifdef CONFIG_PM
+static int el3_suspend(struct pm_dev *pdev);
+static int el3_resume(struct pm_dev *pdev);
+static int el3_pm_callback(struct pm_dev *pdev, pm_request_t rqst, void *data);
+#endif

#ifdef CONFIG_MCA
struct el3_mca_adapters_struct {
@@ -219,7 +232,7 @@
#endif /* CONFIG_ISAPNP || CONFIG_ISAPNP_MODULE */
static int nopnp;

-int __init el3_probe(struct net_device *dev)
+int __init el3_probe(struct net_device *dev, int card_idx)
{
struct el3_private *lp;
short lrs_state = 0xff, i;
@@ -525,6 +538,16 @@
dev->watchdog_timeo = TX_TIMEOUT;
dev->do_ioctl = netdev_ioctl;

+#ifdef CONFIG_PM
+ /* register power management */
+ lp->pmdev = pm_register(PM_ISA_DEV, card_idx, el3_pm_callback);
+ if (lp->pmdev) {
+ struct pm_dev *p;
+ p = lp->pmdev;
+ p->data = (struct net_device *)dev;
+ }
+#endif
+
/* Fill in the generic fields of the device structure. */
ether_setup(dev);
return 0;
@@ -581,53 +604,7 @@
printk("%s: Opening, IRQ %d status@%x %4.4x.\n", dev->name,
dev->irq, ioaddr + EL3_STATUS, inw(ioaddr + EL3_STATUS));

- /* Activate board: this is probably unnecessary. */
- outw(0x0001, ioaddr + 4);
-
- /* Set the IRQ line. */
- outw((dev->irq << 12) | 0x0f00, ioaddr + WN0_IRQ);
-
- /* Set the station address in window 2 each time opened. */
- EL3WINDOW(2);
-
- for (i = 0; i < 6; i++)
- outb(dev->dev_addr[i], ioaddr + i);
-
- if (dev->if_port == 3)
- /* Start the thinnet transceiver. We should really wait 50ms...*/
- outw(StartCoax, ioaddr + EL3_CMD);
- else if (dev->if_port == 0) {
- /* 10baseT interface, enabled link beat and jabber check. */
- EL3WINDOW(4);
- outw(inw(ioaddr + WN4_MEDIA) | MEDIA_TP, ioaddr + WN4_MEDIA);
- }
-
- /* Switch to the stats window, and clear all stats by reading. */
- outw(StatsDisable, ioaddr + EL3_CMD);
- EL3WINDOW(6);
- for (i = 0; i < 9; i++)
- inb(ioaddr + i);
- inw(ioaddr + 10);
- inw(ioaddr + 12);
-
- /* Switch to register set 1 for normal use. */
- EL3WINDOW(1);
-
- /* Accept b-case and phys addr only. */
- outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
- outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
-
- netif_start_queue(dev);
-
- outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
- outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
- /* Allow status bits to be seen. */
- outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
- /* Ack all pending events, and set active indicator mask. */
- outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
- ioaddr + EL3_CMD);
- outw(SetIntrEnb | IntLatch|TxAvailable|TxComplete|RxComplete|StatsFull,
- ioaddr + EL3_CMD);
+ el3_up(dev);

if (el3_debug > 3)
printk("%s: Opened 3c509 IRQ %d status %4.4x.\n",
@@ -986,23 +963,7 @@
if (el3_debug > 2)
printk("%s: Shutting down ethercard.\n", dev->name);

- netif_stop_queue(dev);
-
- /* Turn off statistics ASAP. We update lp->stats below. */
- outw(StatsDisable, ioaddr + EL3_CMD);
-
- /* Disable the receiver and transmitter. */
- outw(RxDisable, ioaddr + EL3_CMD);
- outw(TxDisable, ioaddr + EL3_CMD);
-
- if (dev->if_port == 3)
- /* Turn off thinnet power. Green! */
- outw(StopCoax, ioaddr + EL3_CMD);
- else if (dev->if_port == 0) {
- /* Disable link beat and jabber, if_port may change ere next open(). */
- EL3WINDOW(4);
- outw(inw(ioaddr + WN4_MEDIA) & ~MEDIA_TP, ioaddr + WN4_MEDIA);
- }
+ el3_down(dev);

free_irq(dev->irq, dev);
/* Switching back to window 0 disables the IRQ. */
@@ -1010,7 +971,6 @@
/* But we explicitly zero the IRQ line select anyway. */
outw(0x0f00, ioaddr + WN0_IRQ);

- update_stats(dev);
return 0;
}

@@ -1092,7 +1052,153 @@

return rc;
}
-
+
+static void el3_down(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr;
+
+ netif_stop_queue(dev);
+
+ /* Turn off statistics ASAP. We update lp->stats below. */
+ outw(StatsDisable, ioaddr + EL3_CMD);
+
+ /* Disable the receiver and transmitter. */
+ outw(RxDisable, ioaddr + EL3_CMD);
+ outw(TxDisable, ioaddr + EL3_CMD);
+
+ if (dev->if_port == 3)
+ /* Turn off thinnet power. Green! */
+ outw(StopCoax, ioaddr + EL3_CMD);
+ else if (dev->if_port == 0) {
+ /* Disable link beat and jabber, if_port may change ere next open(). */
+ EL3WINDOW(4);
+ outw(inw(ioaddr + WN4_MEDIA) & ~MEDIA_TP, ioaddr + WN4_MEDIA);
+ }
+
+ outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
+
+ update_stats(dev);
+}
+
+static void el3_up(struct net_device *dev)
+{
+ int i;
+ int ioaddr = dev->base_addr;
+
+ /* Activating the board required and does no harm otherwise */
+ outw(0x0001, ioaddr + 4);
+
+ /* Set the IRQ line. */
+ outw((dev->irq << 12) | 0x0f00, ioaddr + WN0_IRQ);
+
+ /* Set the station address in window 2 each time opened. */
+ EL3WINDOW(2);
+
+ for (i = 0; i < 6; i++)
+ outb(dev->dev_addr[i], ioaddr + i);
+
+ if (dev->if_port == 3)
+ /* Start the thinnet transceiver. We should really wait 50ms...*/
+ outw(StartCoax, ioaddr + EL3_CMD);
+ else if (dev->if_port == 0) {
+ /* 10baseT interface, enabled link beat and jabber check. */
+ EL3WINDOW(4);
+ outw(inw(ioaddr + WN4_MEDIA) | MEDIA_TP, ioaddr + WN4_MEDIA);
+ }
+
+ /* Switch to the stats window, and clear all stats by reading. */
+ outw(StatsDisable, ioaddr + EL3_CMD);
+ EL3WINDOW(6);
+ for (i = 0; i < 9; i++)
+ inb(ioaddr + i);
+ inw(ioaddr + 10);
+ inw(ioaddr + 12);
+
+ /* Switch to register set 1 for normal use. */
+ EL3WINDOW(1);
+
+ /* Accept b-case and phys addr only. */
+ outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
+ outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
+
+ outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
+ outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
+ /* Allow status bits to be seen. */
+ outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
+ /* Ack all pending events, and set active indicator mask. */
+ outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
+ ioaddr + EL3_CMD);
+ outw(SetIntrEnb | IntLatch|TxAvailable|TxComplete|RxComplete|StatsFull,
+ ioaddr + EL3_CMD);
+
+ netif_start_queue(dev);
+}
+
+/* Power Management support functions */
+#ifdef CONFIG_PM
+
+static int el3_suspend(struct pm_dev *pdev)
+{
+ unsigned long flags;
+ struct net_device *dev;
+ struct el3_private *lp;
+
+ if (!pdev && !pdev->data)
+ return -EINVAL;
+
+ dev = (struct net_device *)pdev->data;
+ lp = (struct el3_private *)dev->priv;
+
+ spin_lock_irqsave(&lp->lock, flags);
+
+
+ if (netif_running(dev))
+ netif_device_detach(dev);
+
+ el3_down(dev);
+
+ spin_unlock_irqrestore(&lp->lock, flags);
+ return 0;
+}
+
+static int el3_resume(struct pm_dev *pdev)
+{
+ unsigned long flags;
+ struct net_device *dev;
+ struct el3_private *lp;
+
+ if (!pdev && !pdev->data)
+ return -EINVAL;
+
+ dev = (struct net_device *)pdev->data;
+ lp = (struct el3_private *)dev->priv;
+
+ spin_lock_irqsave(&lp->lock, flags);
+
+
+ if (netif_running(dev))
+ netif_device_attach(dev);
+
+ el3_up(dev);
+
+ spin_unlock_irqrestore(&lp->lock, flags);
+ return 0;
+}
+
+static int el3_pm_callback(struct pm_dev *pdev, pm_request_t rqst, void *data)
+{
+ switch (rqst) {
+ case PM_SUSPEND:
+ return el3_suspend(pdev);
+
+ case PM_RESUME:
+ return el3_resume(pdev);
+ }
+ return 0;
+}
+
+#endif /* CONFIG_PM */
+
#ifdef MODULE
/* Parameters that may be passed into the module. */
static int debug = -1;
@@ -1121,7 +1227,7 @@
el3_debug = debug;

el3_root_dev = NULL;
- while (el3_probe(0) == 0) {
+ while (el3_probe(0, el3_cards) == 0) {
if (irq[el3_cards] > 1)
el3_root_dev->irq = irq[el3_cards];
if (xcvr[el3_cards] >= 0)
@@ -1143,7 +1249,12 @@
#ifdef CONFIG_MCA
if(lp->mca_slot!=-1)
mca_mark_as_unused(lp->mca_slot);
-#endif
+#endif
+
+#ifdef CONFIG_PM
+ if (lp->pmdev)
+ pm_unregister(lp->pmdev);
+#endif
next_dev = lp->next_dev;
unregister_netdev(el3_root_dev);
release_region(el3_root_dev->base_addr, EL3_IO_EXTENT);
-
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