drivers/net/wireless/orinoco_pci.c - kernel/msm-4.9 - Gitiles

 /* orinoco_pci.c
  *
  * Driver for Prism II devices that have a direct PCI interface
  * (i.e., not in a Pcmcia or PLX bridge)
  *
  * Specifically here we're talking about the Linksys WMP11
  *
  * Current maintainers (as of 29 September 2003) 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.
  */

 /*
  * Theory of operation...
  * -------------------
  * Maybe you had a look in orinoco_plx. Well, this is totally different...
  *
  * The card contains only one PCI region, which contains all the usual
  * hermes registers.
  *
  * The driver will memory map this region in normal memory. Because
  * the hermes registers are mapped in normal memory and not in ISA I/O
  * post space, we can't use the usual inw/outw macros and we need to
  * use readw/writew.
  * This slight difference force us to compile our own version of
  * hermes.c with the register access macro changed. That's a bit
  * hackish but works fine.
  *
  * Note that the PCI region is pretty big (4K). That's much more than
  * the usual set of hermes register (0x0 -> 0x3E). I've got a strong
  * suspicion that the whole memory space of the adapter is in fact in
  * this region. Accessing directly the adapter memory instead of going
  * through the usual register would speed up significantely the
  * operations...
  *
  * Finally, the card looks like this :
 -----------------------
   Bus  0, device  14, function  0:
     Network controller: PCI device 1260:3873 (Harris Semiconductor) (rev 1).
       IRQ 11.
       Master Capable.  Latency=248.
       Prefetchable 32 bit memory at 0xffbcc000 [0xffbccfff].
 -----------------------
 00:0e.0 Network controller: Harris Semiconductor: Unknown device 3873 (rev 01)
         Subsystem: Unknown device 1737:3874
         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
         Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
         Latency: 248 set, cache line size 08
         Interrupt: pin A routed to IRQ 11
         Region 0: Memory at ffbcc000 (32-bit, prefetchable) [size=4K]
         Capabilities: [dc] Power Management version 2
                 Flags: PMEClk- AuxPwr- DSI- D1+ D2+ PME+
                 Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 -----------------------
  *
  * That's all..
  *
  * Jean II
  */

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

 #include <linux/config.h>
 #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"

 /* All the magic there is from wlan-ng */
 /* Magic offset of the reset register of the PCI card */
 #define HERMES_PCI_COR		(0x26)
 /* Magic 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 PCI 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 notice */
 	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;
 	struct net_device *dev;
 	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 */
 	dev = alloc_orinocodev(sizeof(*card), orinoco_pci_cor_reset);
 	if (!dev) {
 		printk(KERN_ERR PFX "Cannot allocate network device\n");
 		err = -ENOMEM;
 		goto fail_alloc;
 	}

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

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

 	err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ,
 			  dev->name, dev);
 	if (err) {
 		printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
 		err = -EBUSY;
 		goto fail_irq;
 	}
 	orinoco_pci_setup_netdev(dev, pdev, 0);

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

 	err = register_netdev(dev);
 	if (err) {
 		printk(KERN_ERR PFX "Cannot register network device\n");
 		goto fail;
 	}

 	pci_set_drvdata(pdev, dev);

 	return 0;

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

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

  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 net_device *dev = pci_get_drvdata(pdev);
 	struct orinoco_private *priv = netdev_priv(dev);

 	unregister_netdev(dev);
 	free_irq(dev->irq, dev);
 	pci_set_drvdata(pdev, NULL);
 	free_orinocodev(dev);
 	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_module_init(&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 II devices that have a direct PCI interface
	* (i.e., not in a Pcmcia or PLX bridge)
	*
	* Specifically here we're talking about the Linksys WMP11
	*
	* Current maintainers (as of 29 September 2003) 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.
	*/

	/*
	* Theory of operation...
	* -------------------
	* Maybe you had a look in orinoco_plx. Well, this is totally different...
	*
	* The card contains only one PCI region, which contains all the usual
	* hermes registers.
	*
	* The driver will memory map this region in normal memory. Because
	* the hermes registers are mapped in normal memory and not in ISA I/O
	* post space, we can't use the usual inw/outw macros and we need to
	* use readw/writew.
	* This slight difference force us to compile our own version of
	* hermes.c with the register access macro changed. That's a bit
	* hackish but works fine.
	*
	* Note that the PCI region is pretty big (4K). That's much more than
	* the usual set of hermes register (0x0 -> 0x3E). I've got a strong
	* suspicion that the whole memory space of the adapter is in fact in
	* this region. Accessing directly the adapter memory instead of going
	* through the usual register would speed up significantely the
	* operations...
	*
	* Finally, the card looks like this :
	-----------------------
	Bus 0, device 14, function 0:
	Network controller: PCI device 1260:3873 (Harris Semiconductor) (rev 1).
	IRQ 11.
	Master Capable. Latency=248.
	Prefetchable 32 bit memory at 0xffbcc000 [0xffbccfff].
	-----------------------
	00:0e.0 Network controller: Harris Semiconductor: Unknown device 3873 (rev 01)
	Subsystem: Unknown device 1737:3874
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 248 set, cache line size 08
	Interrupt: pin A routed to IRQ 11
	Region 0: Memory at ffbcc000 (32-bit, prefetchable) [size=4K]
	Capabilities: [dc] Power Management version 2
	Flags: PMEClk- AuxPwr- DSI- D1+ D2+ PME+
	Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	-----------------------
	*
	* That's all..
	*
	* Jean II
	*/

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

	#include <linux/config.h>
	#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"

	/* All the magic there is from wlan-ng */
	/* Magic offset of the reset register of the PCI card */
	#define HERMES_PCI_COR (0x26)
	/* Magic 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 PCI 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 notice */
	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;
	struct net_device *dev;
	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 */
	dev = alloc_orinocodev(sizeof(*card), orinoco_pci_cor_reset);
	if (!dev) {
	printk(KERN_ERR PFX "Cannot allocate network device\n");
	err = -ENOMEM;
	goto fail_alloc;
	}

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

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

	err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ,
	dev->name, dev);
	if (err) {
	printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
	err = -EBUSY;
	goto fail_irq;
	}
	orinoco_pci_setup_netdev(dev, pdev, 0);

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

	err = register_netdev(dev);
	if (err) {
	printk(KERN_ERR PFX "Cannot register network device\n");
	goto fail;
	}

	pci_set_drvdata(pdev, dev);

	return 0;

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

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

	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 net_device *dev = pci_get_drvdata(pdev);
	struct orinoco_private *priv = netdev_priv(dev);

	unregister_netdev(dev);
	free_irq(dev->irq, dev);
	pci_set_drvdata(pdev, NULL);
	free_orinocodev(dev);
	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_module_init(&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:
	*/