--- /dev/null
+/*
+ * 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 */
Code Review / kvmfornfv.git / blobdiff