/* * Copyright (C) 2002 Intersil Americas Inc. * Copyright (C) 2003 Herbert Valerio Riedel * * 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 . * */ #include #include #include #include #include /* For __init, __exit */ #include #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 "); 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 */