pci pm support

From: Gerald Britton (gbritton_at_doomcom.org)
Date: 2002-06-22 18:07:48 UTC

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this patch adds simple pci suspend/resume support to hostap_pci. It seems to work for me, basically resetting the card following a resume. It could probably use a few more #ifdefs for the pci features vs. kernel version. It does things a little differently if the interface is up, but I think i've got it right. I generally ifdown wlan0 on suspend, so i don't normally hit this, but i tested it once and it seemed to work.

• Gerald

diff -ruN hostap.orig/driver/modules/hostap_pci.c hostap/driver/modules/hostap_pci.c

--- hostap.orig/driver/modules/hostap_pci.c	Fri Jun  7 12:09:56 2002


+++ hostap/driver/modules/hostap_pci.c	Sat Jun 15 13:21:39 2002

+static int prism2_pci_suspend(struct pci_dev *pdev, u32 state)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ local_info_t *local = (local_info_t *) dev->priv;
+
+ if (netif_running(dev)) {
+ prism2_netif_stop_queues(dev);
+ netif_device_detach(dev);
+ }
+ pci_save_state(pdev, local->pci_save_state);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, 3);
+
+ return 0;
+}
+
+static int prism2_pci_resume(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ local_info_t *local = (local_info_t *) dev->priv;
+
+ pci_enable_device(pdev);
+ pci_restore_state(pdev, local->pci_save_state);
+ prism2_hw_reset(dev);
+ if (netif_running(dev)) {
+ netif_device_attach(dev);
+ netif_start_queue(dev);
+ }
+
+ return 0;
+}
 

 MODULE_DEVICE_TABLE(pci, prism2_pci_id_table);  

@@ -229,14 +260,11 @@

 	id_table: prism2_pci_id_table,
 	probe: prism2_pci_probe,
 	remove: prism2_pci_remove,


+	suspend: prism2_pci_suspend,

+	resume: prism2_pci_resume,

 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,6))
 	save_state: NULL,
-	suspend: NULL,
-	resume: NULL,
-	enable_wake: NULL
-#else /* Linux < 2.4.6 */
-	suspend: NULL,
-	resume: NULL


+	enable_wake: NULL,

diff -ruN hostap.orig/driver/modules/prism2_wlan.h hostap/driver/modules/prism2_wlan.h

--- hostap.orig/driver/modules/prism2_wlan.h	Fri Jun 14 13:00:07 2002


+++ hostap/driver/modules/prism2_wlan.h	Sat Jun 15 12:59:05 2002

         struct prism2_helper_functions *func;  

-#if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
+#if defined(PRISM2_PCI)
+ u32 pci_save_state[64/sizeof(u32)];
+#if defined(PRISM2_BUS_MASTER)

 	/* bus master for BAP0 (TX) */
 	int bus_master_threshold_tx;
 	int bus_m0_tx_idx;
@@ -934,7 +936,8 @@
 	/* bus master for BAP1 (RX) */
 	int bus_master_threshold_rx;
 	int bus_m1_in_use;
-#endif /* PRISM2_PCI and PRISM2_BUS_MASTER */

 	u8 *bus_m1_buf;
 	prism2_wds_info_t *rx_wds;
 	struct hfa384x_rx_frame rxdesc;

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