1 files changed, 339 insertions, 0 deletions
diff --git a/drivers/net/wireless/intersil/prism54/islpci_hotplug.c b/drivers/net/wireless/intersil/prism54/islpci_hotplug.c
new file mode 100644
index 0000000..300c846
--- /dev/null
+++ b/drivers/net/wireless/intersil/prism54/islpci_hotplug.c
@@ -0,0 +1,339 @@
+/*
+ *  Copyright (C) 2002 Intersil Americas Inc.
+ *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/init.h> /* For __init, __exit */
+#include <linux/dma-mapping.h>
+
+#include "prismcompat.h"
+#include "islpci_dev.h"
+#include "islpci_mgt.h"		/* for pc_debug */
+#include "isl_oid.h"
+
+MODULE_AUTHOR("[Intersil] R.Bastings and W.Termorshuizen, The prism54.org Development Team <prism54-devel@prism54.org>");
+MODULE_DESCRIPTION("The Prism54 802.11 Wireless LAN adapter");
+MODULE_LICENSE("GPL");
+
+static int	init_pcitm = 0;
+module_param(init_pcitm, int, 0);
+
+/* In this order: vendor, device, subvendor, subdevice, class, class_mask,
+ * driver_data
+ * If you have an update for this please contact prism54-devel@prism54.org
+ * The latest list can be found at http://wireless.kernel.org/en/users/Drivers/p54 */
+static const struct pci_device_id prism54_id_tbl[] = {
+	/* Intersil PRISM Duette/Prism GT Wireless LAN adapter */
+	{
+	 0x1260, 0x3890,
+	 PCI_ANY_ID, PCI_ANY_ID,
+	 0, 0, 0
+	},
+
+	/* 3COM 3CRWE154G72 Wireless LAN adapter */
+	{
+	 PCI_VDEVICE(3COM, 0x6001), 0
+	},
+
+	/* Intersil PRISM Indigo Wireless LAN adapter */
+	{
+	 0x1260, 0x3877,
+	 PCI_ANY_ID, PCI_ANY_ID,
+	 0, 0, 0
+	},
+
+	/* Intersil PRISM Javelin/Xbow Wireless LAN adapter */
+	{
+	 0x1260, 0x3886,
+	 PCI_ANY_ID, PCI_ANY_ID,
+	 0, 0, 0
+	},
+
+	/* End of list */
+	{0,0,0,0,0,0,0}
+};
+
+/* register the device with the Hotplug facilities of the kernel */
+MODULE_DEVICE_TABLE(pci, prism54_id_tbl);
+
+static int prism54_probe(struct pci_dev *, const struct pci_device_id *);
+static void prism54_remove(struct pci_dev *);
+static int prism54_suspend(struct pci_dev *, pm_message_t state);
+static int prism54_resume(struct pci_dev *);
+
+static struct pci_driver prism54_driver = {
+	.name = DRV_NAME,
+	.id_table = prism54_id_tbl,
+	.probe = prism54_probe,
+	.remove = prism54_remove,
+	.suspend = prism54_suspend,
+	.resume = prism54_resume,
+};
+
+/******************************************************************************
+    Module initialization functions
+******************************************************************************/
+
+static int
+prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct net_device *ndev;
+	u8 latency_tmr;
+	u32 mem_addr;
+	islpci_private *priv;
+	int rvalue;
+
+	/* Enable the pci device */
+	if (pci_enable_device(pdev)) {
+		printk(KERN_ERR "%s: pci_enable_device() failed.\n", DRV_NAME);
+		return -ENODEV;
+	}
+
+	/* check whether the latency timer is set correctly */
+	pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_tmr);
+#if VERBOSE > SHOW_ERROR_MESSAGES
+	DEBUG(SHOW_TRACING, "latency timer: %x\n", latency_tmr);
+#endif
+	if (latency_tmr < PCIDEVICE_LATENCY_TIMER_MIN) {
+		/* set the latency timer */
+		pci_write_config_byte(pdev, PCI_LATENCY_TIMER,
+				      PCIDEVICE_LATENCY_TIMER_VAL);
+	}
+
+	/* enable PCI DMA */
+	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
+		printk(KERN_ERR "%s: 32-bit PCI DMA not supported", DRV_NAME);
+		goto do_pci_disable_device;
+        }
+
+	/* 0x40 is the programmable timer to configure the response timeout (TRDY_TIMEOUT)
+	 * 0x41 is the programmable timer to configure the retry timeout (RETRY_TIMEOUT)
+	 *	The RETRY_TIMEOUT is used to set the number of retries that the core, as a
+	 *	Master, will perform before abandoning a cycle. The default value for
+	 *	RETRY_TIMEOUT is 0x80, which far exceeds the PCI 2.1 requirement for new
+	 *	devices. A write of zero to the RETRY_TIMEOUT register disables this
+	 *	function to allow use with any non-compliant legacy devices that may
+	 *	execute more retries.
+	 *
+	 *	Writing zero to both these two registers will disable both timeouts and
+	 *	*can* solve problems caused by devices that are slow to respond.
+	 *	Make this configurable - MSW
+	 */
+	if ( init_pcitm >= 0 ) {
+		pci_write_config_byte(pdev, 0x40, (u8)init_pcitm);
+		pci_write_config_byte(pdev, 0x41, (u8)init_pcitm);
+	} else {
+		printk(KERN_INFO "PCI TRDY/RETRY unchanged\n");
+	}
+
+	/* request the pci device I/O regions */
+	rvalue = pci_request_regions(pdev, DRV_NAME);
+	if (rvalue) {
+		printk(KERN_ERR "%s: pci_request_regions failure (rc=%d)\n",
+		       DRV_NAME, rvalue);
+		goto do_pci_disable_device;
+	}
+
+	/* check if the memory window is indeed set */
+	rvalue = pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &mem_addr);
+	if (rvalue || !mem_addr) {
+		printk(KERN_ERR "%s: PCI device memory region not configured; fix your BIOS or CardBus bridge/drivers\n",
+		       DRV_NAME);
+		goto do_pci_release_regions;
+	}
+
+	/* enable PCI bus-mastering */
+	DEBUG(SHOW_TRACING, "%s: pci_set_master(pdev)\n", DRV_NAME);
+	pci_set_master(pdev);
+
+	/* enable MWI */
+	pci_try_set_mwi(pdev);
+
+	/* setup the network device interface and its structure */
+	if (!(ndev = islpci_setup(pdev))) {
+		/* error configuring the driver as a network device */
+		printk(KERN_ERR "%s: could not configure network device\n",
+		       DRV_NAME);
+		goto do_pci_clear_mwi;
+	}
+
+	priv = netdev_priv(ndev);
+	islpci_set_state(priv, PRV_STATE_PREBOOT); /* we are attempting to boot */
+
+	/* card is in unknown state yet, might have some interrupts pending */
+	isl38xx_disable_interrupts(priv->device_base);
+
+	/* request for the interrupt before uploading the firmware */
+	rvalue = request_irq(pdev->irq, islpci_interrupt,
+			     IRQF_SHARED, ndev->name, priv);
+
+	if (rvalue) {
+		/* error, could not hook the handler to the irq */
+		printk(KERN_ERR "%s: could not install IRQ handler\n",
+		       ndev->name);
+		goto do_unregister_netdev;
+	}
+
+	/* firmware upload is triggered in islpci_open */
+
+	return 0;
+
+      do_unregister_netdev:
+	unregister_netdev(ndev);
+	islpci_free_memory(priv);
+	free_netdev(ndev);
+	priv = NULL;
+      do_pci_clear_mwi:
+	pci_clear_mwi(pdev);
+      do_pci_release_regions:
+	pci_release_regions(pdev);
+      do_pci_disable_device:
+	pci_disable_device(pdev);
+	return -EIO;
+}
+
+/* set by cleanup_module */
+static volatile int __in_cleanup_module = 0;
+
+/* this one removes one(!!) instance only */
+static void
+prism54_remove(struct pci_dev *pdev)
+{
+	struct net_device *ndev = pci_get_drvdata(pdev);
+	islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
+	BUG_ON(!priv);
+
+	if (!__in_cleanup_module) {
+		printk(KERN_DEBUG "%s: hot unplug detected\n", ndev->name);
+		islpci_set_state(priv, PRV_STATE_OFF);
+	}
+
+	printk(KERN_DEBUG "%s: removing device\n", ndev->name);
+
+	unregister_netdev(ndev);
+
+	/* free the interrupt request */
+
+	if (islpci_get_state(priv) != PRV_STATE_OFF) {
+		isl38xx_disable_interrupts(priv->device_base);
+		islpci_set_state(priv, PRV_STATE_OFF);
+		/* This bellow causes a lockup at rmmod time. It might be
+		 * because some interrupts still linger after rmmod time,
+		 * see bug #17 */
+		/* pci_set_power_state(pdev, 3);*/	/* try to power-off */
+	}
+
+	free_irq(pdev->irq, priv);
+
+	/* free the PCI memory and unmap the remapped page */
+	islpci_free_memory(priv);
+
+	free_netdev(ndev);
+	priv = NULL;
+
+	pci_clear_mwi(pdev);
+
+	pci_release_regions(pdev);
+
+	pci_disable_device(pdev);
+}
+
+static int
+prism54_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	struct net_device *ndev = pci_get_drvdata(pdev);
+	islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
+	BUG_ON(!priv);
+
+
+	pci_save_state(pdev);
+
+	/* tell the device not to trigger interrupts for now... */
+	isl38xx_disable_interrupts(priv->device_base);
+
+	/* from now on assume the hardware was already powered down
+	   and don't touch it anymore */
+	islpci_set_state(priv, PRV_STATE_OFF);
+
+	netif_stop_queue(ndev);
+	netif_device_detach(ndev);
+
+	return 0;
+}
+
+static int
+prism54_resume(struct pci_dev *pdev)
+{
+	struct net_device *ndev = pci_get_drvdata(pdev);
+	islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
+	int err;
+
+	BUG_ON(!priv);
+
+	printk(KERN_NOTICE "%s: got resume request\n", ndev->name);
+
+	err = pci_enable_device(pdev);
+	if (err) {
+		printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
+		       ndev->name);
+		return err;
+	}
+
+	pci_restore_state(pdev);
+
+	/* alright let's go into the PREBOOT state */
+	islpci_reset(priv, 1);
+
+	netif_device_attach(ndev);
+	netif_start_queue(ndev);
+
+	return 0;
+}
+
+static int __init
+prism54_module_init(void)
+{
+	printk(KERN_INFO "Loaded %s driver, version %s\n",
+	       DRV_NAME, DRV_VERSION);
+
+	__bug_on_wrong_struct_sizes ();
+
+	return pci_register_driver(&prism54_driver);
+}
+
+/* by the time prism54_module_exit() terminates, as a postcondition
+ * all instances will have been destroyed by calls to
+ * prism54_remove() */
+static void __exit
+prism54_module_exit(void)
+{
+	__in_cleanup_module = 1;
+
+	pci_unregister_driver(&prism54_driver);
+
+	printk(KERN_INFO "Unloaded %s driver\n", DRV_NAME);
+
+	__in_cleanup_module = 0;
+}
+
+/* register entry points */
+module_init(prism54_module_init);
+module_exit(prism54_module_exit);
+/* EOF */