orinoco_tmd.c

h内核

/* orinoco_tmd.c
 * 
 * Driver for Prism II devices which would usually be driven by orinoco_cs,
 * but are connected to the PCI bus by a TMD7160. 
 *
 * Copyright (C) 2003 Joerg Dorchain <joerg AT dorchain.net>
 * based heavily upon orinoco_plx.c Copyright (C) 2001 Daniel Barlow
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License
 * at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and
 * limitations under the License.
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License version 2 (the "GPL"), in
 * which case the provisions of the GPL are applicable instead of the
 * above.  If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the GPL.  If you do not delete the
 * provisions above, a recipient may use your version of this file
 * under either the MPL or the GPL.

 * Caution: this is experimental and probably buggy.  For success and
 * failure reports for different cards and adaptors, see
 * orinoco_tmd_pci_id_table near the end of the file.  If you have a
 * card we don't have the PCI id for, and looks like it should work,
 * drop me mail with the id and "it works"/"it doesn't work".
 *
 * Note: if everything gets detected fine but it doesn't actually send
 * or receive packets, your first port of call should probably be to   
 * try newer firmware in the card.  Especially if you're doing Ad-Hoc
 * modes
 *
 * The actual driving is done by orinoco.c, this is just resource
 * allocation stuff.
 *
 * This driver is modeled after the orinoco_plx driver. The main
 * difference is that the TMD chip has only IO port ranges and no
 * memory space, i.e.  no access to the CIS. Compared to the PLX chip,
 * the io range functionalities are exchanged.
 *
 * Pheecom sells cards with the TMD chip as "ASIC version"
 */

#define DRIVER_NAME "orinoco_tmd"
#define PFX DRIVER_NAME ": "

#include <linux/config.h>

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/fcntl.h>

#include <pcmcia/cisreg.h>

#include "hermes.h"
#include "orinoco.h"

#define COR_VALUE	(COR_LEVEL_REQ | COR_FUNC_ENA) /* Enable PC card with interrupt in level trigger */

static int orinoco_tmd_init_one(struct pci_dev *pdev,
				const struct pci_device_id *ent)
{
	int err = 0;
	u32 reg, addr;
	struct orinoco_private *priv = NULL;
	unsigned long pccard_ioaddr = 0;
	unsigned long pccard_iolen = 0;
	struct net_device *dev = NULL;

	err = pci_enable_device(pdev);
	if (err)
		return -EIO;

	printk(KERN_DEBUG PFX "TMD setup\n");
	pccard_ioaddr = pci_resource_start(pdev, 2);
	pccard_iolen = pci_resource_len(pdev, 2);
	if (! request_region(pccard_ioaddr, pccard_iolen, DRIVER_NAME)) {
		printk(KERN_ERR PFX "I/O resource at 0x%lx len 0x%lx busy\n",
			pccard_ioaddr, pccard_iolen);
		pccard_ioaddr = 0;
		err = -EBUSY;
		goto fail;
	}
	addr = pci_resource_start(pdev, 1);
	outb(COR_VALUE, addr);
	mdelay(1);
	reg = inb(addr);
	if (reg != COR_VALUE) {
		printk(KERN_ERR PFX "Error setting TMD COR values %x should be %x\n", reg, COR_VALUE);
		err = -EIO;
		goto fail;
	}

	/* Allocate network device */
	dev = alloc_orinocodev(0, NULL);
	if (! dev) {
		err = -ENOMEM;
		goto fail;
	}

	priv = netdev_priv(dev);
	dev->base_addr = pccard_ioaddr;
	SET_MODULE_OWNER(dev);
	SET_NETDEV_DEV(dev, &pdev->dev);

	printk(KERN_DEBUG PFX "Detected Orinoco/Prism2 TMD device "
	       "at %s irq:%d, io addr:0x%lx\n", pci_name(pdev), pdev->irq,
	       pccard_ioaddr);

	hermes_struct_init(&(priv->hw), dev->base_addr,
			HERMES_IO, HERMES_16BIT_REGSPACING);
	pci_set_drvdata(pdev, dev);

	err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ,
			  dev->name, dev);
	if (err) {
		printk(KERN_ERR PFX "Error allocating IRQ %d.\n",
		       pdev->irq);
		err = -EBUSY;
		goto fail;
	}
	dev->irq = pdev->irq;

	err = register_netdev(dev);
	if (err)
		goto fail;

	return 0;

 fail:
	printk(KERN_DEBUG PFX "init_one(), FAIL!\n");

	if (dev) {
		if (dev->irq)
			free_irq(dev->irq, dev);
		
		free_netdev(dev);
	}

	if (pccard_ioaddr)
		release_region(pccard_ioaddr, pccard_iolen);

	pci_disable_device(pdev);

	return err;
}

static void __devexit orinoco_tmd_remove_one(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);

	BUG_ON(! dev);

	unregister_netdev(dev);
		
	if (dev->irq)
		free_irq(dev->irq, dev);
		
	pci_set_drvdata(pdev, NULL);

	free_netdev(dev);

	release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));

	pci_disable_device(pdev);
}


static struct pci_device_id orinoco_tmd_pci_id_table[] = {
	{0x15e8, 0x0131, PCI_ANY_ID, PCI_ANY_ID,},      /* NDC and OEMs, e.g. pheecom */
	{0,},
};

MODULE_DEVICE_TABLE(pci, orinoco_tmd_pci_id_table);

static struct pci_driver orinoco_tmd_driver = {
	.name		= DRIVER_NAME,
	.id_table	= orinoco_tmd_pci_id_table,
	.probe		= orinoco_tmd_init_one,
	.remove		= __devexit_p(orinoco_tmd_remove_one),
};

static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
	" (Joerg Dorchain <[e-mail]>)";
MODULE_AUTHOR("Joerg Dorchain <[e-mail]>");
MODULE_DESCRIPTION("Driver for wireless LAN cards using the TMD7160 PCI bridge");
MODULE_LICENSE("Dual MPL/GPL");

static int __init orinoco_tmd_init(void)
{
	printk(KERN_DEBUG "%s\n", version);
	return pci_module_init(&orinoco_tmd_driver);
}

static void __exit orinoco_tmd_exit(void)
{
	pci_unregister_driver(&orinoco_tmd_driver);
	current->state = TASK_UNINTERRUPTIBLE;
	schedule_timeout(HZ);
}

module_init(orinoco_tmd_init);
module_exit(orinoco_tmd_exit);

/*
 * Local variables:
 *  c-indent-level: 8
 *  c-basic-offset: 8
 *  tab-width: 8
 * End:
 */