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linux-sg2042/drivers/net/wireless/prism54/islpci_hotplug.c

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/*
* 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 */
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