drivers/net/wireless/orinoco/orinoco_pci.c - maze/linux - Git at Google

 /* orinoco_pci.c
  *
  * Driver for Prism 2.5/3 devices that have a direct PCI interface
  * (i.e. these are not PCMCIA cards in a PCMCIA-to-PCI bridge).
  * The card contains only one PCI region, which contains all the usual
  * hermes registers, as well as the COR register.
  *
  * Current maintainers are:
  * 	Pavel Roskin <proski AT gnu.org>
  * and	David Gibson <hermes AT gibson.dropbear.id.au>
  *
  * Some of this code is borrowed from orinoco_plx.c
  *	Copyright (C) 2001 Daniel Barlow <dan AT telent.net>
  * Some of this code is "inspired" by linux-wlan-ng-0.1.10, but nothing
  * has been copied from it. linux-wlan-ng-0.1.10 is originally :
  *	Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
  * This file originally written by:
  *	Copyright (C) 2001 Jean Tourrilhes <jt AT hpl.hp.com>
  * And is now maintained by:
  *	(C) Copyright David Gibson, IBM Corp. 2002-2003.
  *
  * 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.
  */

 #define DRIVER_NAME "orinoco_pci"
 #define PFX DRIVER_NAME ": "

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/pci.h>

 #include "orinoco.h"
 #include "orinoco_pci.h"

 /* Offset of the COR register of the PCI card */
 #define HERMES_PCI_COR		(0x26)

 /* Bitmask to reset the card */
 #define HERMES_PCI_COR_MASK	(0x0080)

 /* Magic timeouts for doing the reset.
  * Those times are straight from wlan-ng, and it is claimed that they
  * are necessary. Alan will kill me. Take your time and grab a coffee. */
 #define HERMES_PCI_COR_ONT	(250)		/* ms */
 #define HERMES_PCI_COR_OFFT	(500)		/* ms */
 #define HERMES_PCI_COR_BUSYT	(500)		/* ms */

 /*
  * Do a soft reset of the card using the Configuration Option Register
  * We need this to get going...
  * This is the part of the code that is strongly inspired from wlan-ng
  *
  * Note : This code is done with irq enabled. This mean that many
  * interrupts will occur while we are there. This is why we use the
  * jiffies to regulate time instead of a straight mdelay(). Usually we
  * need only around 245 iteration of the loop to do 250 ms delay.
  *
  * Note bis : Don't try to access HERMES_CMD during the reset phase.
  * It just won't work !
  */
 static int orinoco_pci_cor_reset(struct orinoco_private *priv)
 {
 	hermes_t *hw = &priv->hw;
 	unsigned long timeout;
 	u16 reg;

 	/* Assert the reset until the card notices */
 	hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
 	mdelay(HERMES_PCI_COR_ONT);

 	/* Give time for the card to recover from this hard effort */
 	hermes_write_regn(hw, PCI_COR, 0x0000);
 	mdelay(HERMES_PCI_COR_OFFT);

 	/* The card is ready when it's no longer busy */
 	timeout = jiffies + (HERMES_PCI_COR_BUSYT * HZ / 1000);
 	reg = hermes_read_regn(hw, CMD);
 	while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
 		mdelay(1);
 		reg = hermes_read_regn(hw, CMD);
 	}

 	/* Still busy? */
 	if (reg & HERMES_CMD_BUSY) {
 		printk(KERN_ERR PFX "Busy timeout\n");
 		return -ETIMEDOUT;
 	}

 	return 0;
 }

 static int orinoco_pci_init_one(struct pci_dev *pdev,
 				const struct pci_device_id *ent)
 {
 	int err;
 	struct orinoco_private *priv;
 	struct orinoco_pci_card *card;
 	void __iomem *hermes_io;

 	err = pci_enable_device(pdev);
 	if (err) {
 		printk(KERN_ERR PFX "Cannot enable PCI device\n");
 		return err;
 	}

 	err = pci_request_regions(pdev, DRIVER_NAME);
 	if (err) {
 		printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
 		goto fail_resources;
 	}

 	hermes_io = pci_iomap(pdev, 0, 0);
 	if (!hermes_io) {
 		printk(KERN_ERR PFX "Cannot remap chipset registers\n");
 		err = -EIO;
 		goto fail_map_hermes;
 	}

 	/* Allocate network device */
 	priv = alloc_orinocodev(sizeof(*card), &pdev->dev,
 				orinoco_pci_cor_reset, NULL);
 	if (!priv) {
 		printk(KERN_ERR PFX "Cannot allocate network device\n");
 		err = -ENOMEM;
 		goto fail_alloc;
 	}

 	card = priv->card;

 	hermes_struct_init(&priv->hw, hermes_io, HERMES_32BIT_REGSPACING);

 	err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
 			  DRIVER_NAME, priv);
 	if (err) {
 		printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
 		err = -EBUSY;
 		goto fail_irq;
 	}

 	err = orinoco_pci_cor_reset(priv);
 	if (err) {
 		printk(KERN_ERR PFX "Initial reset failed\n");
 		goto fail;
 	}

 	err = orinoco_init(priv);
 	if (err) {
 		printk(KERN_ERR PFX "orinoco_init() failed\n");
 		goto fail;
 	}

 	err = orinoco_if_add(priv, 0, 0);
 	if (err) {
 		printk(KERN_ERR PFX "orinoco_if_add() failed\n");
 		goto fail;
 	}

 	pci_set_drvdata(pdev, priv);

 	return 0;

  fail:
 	free_irq(pdev->irq, priv);

  fail_irq:
 	pci_set_drvdata(pdev, NULL);
 	free_orinocodev(priv);

  fail_alloc:
 	pci_iounmap(pdev, hermes_io);

  fail_map_hermes:
 	pci_release_regions(pdev);

  fail_resources:
 	pci_disable_device(pdev);

 	return err;
 }

 static void __devexit orinoco_pci_remove_one(struct pci_dev *pdev)
 {
 	struct orinoco_private *priv = pci_get_drvdata(pdev);

 	orinoco_if_del(priv);
 	free_irq(pdev->irq, priv);
 	pci_set_drvdata(pdev, NULL);
 	free_orinocodev(priv);
 	pci_iounmap(pdev, priv->hw.iobase);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
 }

 static struct pci_device_id orinoco_pci_id_table[] = {
 	/* Intersil Prism 3 */
 	{0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,},
 	/* Intersil Prism 2.5 */
 	{0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
 	/* Samsung MagicLAN SWL-2210P */
 	{0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,},
 	{0,},
 };

 MODULE_DEVICE_TABLE(pci, orinoco_pci_id_table);

 static struct pci_driver orinoco_pci_driver = {
 	.name		= DRIVER_NAME,
 	.id_table	= orinoco_pci_id_table,
 	.probe		= orinoco_pci_init_one,
 	.remove		= __devexit_p(orinoco_pci_remove_one),
 	.suspend	= orinoco_pci_suspend,
 	.resume		= orinoco_pci_resume,
 };

 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
 	" (Pavel Roskin <proski@gnu.org>,"
 	" David Gibson <hermes@gibson.dropbear.id.au> &"
 	" Jean Tourrilhes <jt@hpl.hp.com>)";
 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> &"
 	      " David Gibson <hermes@gibson.dropbear.id.au>");
 MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
 MODULE_LICENSE("Dual MPL/GPL");

 static int __init orinoco_pci_init(void)
 {
 	printk(KERN_DEBUG "%s\n", version);
 	return pci_register_driver(&orinoco_pci_driver);
 }

 static void __exit orinoco_pci_exit(void)
 {
 	pci_unregister_driver(&orinoco_pci_driver);
 }

 module_init(orinoco_pci_init);
 module_exit(orinoco_pci_exit);

 /*
  * Local variables:
  *  c-indent-level: 8
  *  c-basic-offset: 8
  *  tab-width: 8
  * End:
  */
	/* orinoco_pci.c
	*
	* Driver for Prism 2.5/3 devices that have a direct PCI interface
	* (i.e. these are not PCMCIA cards in a PCMCIA-to-PCI bridge).
	* The card contains only one PCI region, which contains all the usual
	* hermes registers, as well as the COR register.
	*
	* Current maintainers are:
	* Pavel Roskin <proski AT gnu.org>
	* and David Gibson <hermes AT gibson.dropbear.id.au>
	*
	* Some of this code is borrowed from orinoco_plx.c
	* Copyright (C) 2001 Daniel Barlow <dan AT telent.net>
	* Some of this code is "inspired" by linux-wlan-ng-0.1.10, but nothing
	* has been copied from it. linux-wlan-ng-0.1.10 is originally :
	* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
	* This file originally written by:
	* Copyright (C) 2001 Jean Tourrilhes <jt AT hpl.hp.com>
	* And is now maintained by:
	* (C) Copyright David Gibson, IBM Corp. 2002-2003.
	*
	* 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.
	*/

	#define DRIVER_NAME "orinoco_pci"
	#define PFX DRIVER_NAME ": "

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/delay.h>
	#include <linux/pci.h>

	#include "orinoco.h"
	#include "orinoco_pci.h"

	/* Offset of the COR register of the PCI card */
	#define HERMES_PCI_COR (0x26)

	/* Bitmask to reset the card */
	#define HERMES_PCI_COR_MASK (0x0080)

	/* Magic timeouts for doing the reset.
	* Those times are straight from wlan-ng, and it is claimed that they
	* are necessary. Alan will kill me. Take your time and grab a coffee. */
	#define HERMES_PCI_COR_ONT (250) /* ms */
	#define HERMES_PCI_COR_OFFT (500) /* ms */
	#define HERMES_PCI_COR_BUSYT (500) /* ms */

	/*
	* Do a soft reset of the card using the Configuration Option Register
	* We need this to get going...
	* This is the part of the code that is strongly inspired from wlan-ng
	*
	* Note : This code is done with irq enabled. This mean that many
	* interrupts will occur while we are there. This is why we use the
	* jiffies to regulate time instead of a straight mdelay(). Usually we
	* need only around 245 iteration of the loop to do 250 ms delay.
	*
	* Note bis : Don't try to access HERMES_CMD during the reset phase.
	* It just won't work !
	*/
	static int orinoco_pci_cor_reset(struct orinoco_private *priv)
	{
	hermes_t *hw = &priv->hw;
	unsigned long timeout;
	u16 reg;

	/* Assert the reset until the card notices */
	hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
	mdelay(HERMES_PCI_COR_ONT);

	/* Give time for the card to recover from this hard effort */
	hermes_write_regn(hw, PCI_COR, 0x0000);
	mdelay(HERMES_PCI_COR_OFFT);

	/* The card is ready when it's no longer busy */
	timeout = jiffies + (HERMES_PCI_COR_BUSYT * HZ / 1000);
	reg = hermes_read_regn(hw, CMD);
	while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
	mdelay(1);
	reg = hermes_read_regn(hw, CMD);
	}

	/* Still busy? */
	if (reg & HERMES_CMD_BUSY) {
	printk(KERN_ERR PFX "Busy timeout\n");
	return -ETIMEDOUT;
	}

	return 0;
	}

	static int orinoco_pci_init_one(struct pci_dev *pdev,
	const struct pci_device_id *ent)
	{
	int err;
	struct orinoco_private *priv;
	struct orinoco_pci_card *card;
	void __iomem *hermes_io;

	err = pci_enable_device(pdev);
	if (err) {
	printk(KERN_ERR PFX "Cannot enable PCI device\n");
	return err;
	}

	err = pci_request_regions(pdev, DRIVER_NAME);
	if (err) {
	printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
	goto fail_resources;
	}

	hermes_io = pci_iomap(pdev, 0, 0);
	if (!hermes_io) {
	printk(KERN_ERR PFX "Cannot remap chipset registers\n");
	err = -EIO;
	goto fail_map_hermes;
	}

	/* Allocate network device */
	priv = alloc_orinocodev(sizeof(*card), &pdev->dev,
	orinoco_pci_cor_reset, NULL);
	if (!priv) {
	printk(KERN_ERR PFX "Cannot allocate network device\n");
	err = -ENOMEM;
	goto fail_alloc;
	}

	card = priv->card;

	hermes_struct_init(&priv->hw, hermes_io, HERMES_32BIT_REGSPACING);

	err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
	DRIVER_NAME, priv);
	if (err) {
	printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
	err = -EBUSY;
	goto fail_irq;
	}

	err = orinoco_pci_cor_reset(priv);
	if (err) {
	printk(KERN_ERR PFX "Initial reset failed\n");
	goto fail;
	}

	err = orinoco_init(priv);
	if (err) {
	printk(KERN_ERR PFX "orinoco_init() failed\n");
	goto fail;
	}

	err = orinoco_if_add(priv, 0, 0);
	if (err) {
	printk(KERN_ERR PFX "orinoco_if_add() failed\n");
	goto fail;
	}

	pci_set_drvdata(pdev, priv);

	return 0;

	fail:
	free_irq(pdev->irq, priv);

	fail_irq:
	pci_set_drvdata(pdev, NULL);
	free_orinocodev(priv);

	fail_alloc:
	pci_iounmap(pdev, hermes_io);

	fail_map_hermes:
	pci_release_regions(pdev);

	fail_resources:
	pci_disable_device(pdev);

	return err;
	}

	static void __devexit orinoco_pci_remove_one(struct pci_dev *pdev)
	{
	struct orinoco_private *priv = pci_get_drvdata(pdev);

	orinoco_if_del(priv);
	free_irq(pdev->irq, priv);
	pci_set_drvdata(pdev, NULL);
	free_orinocodev(priv);
	pci_iounmap(pdev, priv->hw.iobase);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	}

	static struct pci_device_id orinoco_pci_id_table[] = {
	/* Intersil Prism 3 */
	{0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,},
	/* Intersil Prism 2.5 */
	{0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
	/* Samsung MagicLAN SWL-2210P */
	{0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,},
	{0,},
	};

	MODULE_DEVICE_TABLE(pci, orinoco_pci_id_table);

	static struct pci_driver orinoco_pci_driver = {
	.name = DRIVER_NAME,
	.id_table = orinoco_pci_id_table,
	.probe = orinoco_pci_init_one,
	.remove = __devexit_p(orinoco_pci_remove_one),
	.suspend = orinoco_pci_suspend,
	.resume = orinoco_pci_resume,
	};

	static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
	" (Pavel Roskin <proski@gnu.org>,"
	" David Gibson <hermes@gibson.dropbear.id.au> &"
	" Jean Tourrilhes <jt@hpl.hp.com>)";
	MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> &"
	" David Gibson <hermes@gibson.dropbear.id.au>");
	MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
	MODULE_LICENSE("Dual MPL/GPL");

	static int __init orinoco_pci_init(void)
	{
	printk(KERN_DEBUG "%s\n", version);
	return pci_register_driver(&orinoco_pci_driver);
	}

	static void __exit orinoco_pci_exit(void)
	{
	pci_unregister_driver(&orinoco_pci_driver);
	}

	module_init(orinoco_pci_init);
	module_exit(orinoco_pci_exit);

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