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

 /* airport.c
  *
  * A driver for "Hermes" chipset based Apple Airport wireless
  * card.
  *
  * Copyright notice & release notes in file orinoco.c
  *
  * Note specific to airport stub:
  *
  *  0.05 : first version of the new split driver
  *  0.06 : fix possible hang on powerup, add sleep support
  */

 #define DRIVER_NAME "airport"
 #define PFX DRIVER_NAME ": "

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

 #include "orinoco.h"

 #define AIRPORT_IO_LEN	(0x1000)	/* one page */

 struct airport {
 	struct macio_dev *mdev;
 	void __iomem *vaddr;
 	int irq_requested;
 	int ndev_registered;
 };

 static int
 airport_suspend(struct macio_dev *mdev, pm_message_t state)
 {
 	struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
 	struct orinoco_private *priv = netdev_priv(dev);
 	unsigned long flags;
 	int err;

 	printk(KERN_DEBUG "%s: Airport entering sleep mode\n", dev->name);

 	err = orinoco_lock(priv, &flags);
 	if (err) {
 		printk(KERN_ERR "%s: hw_unavailable on PBOOK_SLEEP_NOW\n",
 		       dev->name);
 		return 0;
 	}

 	err = __orinoco_down(dev);
 	if (err)
 		printk(KERN_WARNING "%s: PBOOK_SLEEP_NOW: Error %d downing interface\n",
 		       dev->name, err);

 	netif_device_detach(dev);

 	priv->hw_unavailable++;

 	orinoco_unlock(priv, &flags);

 	disable_irq(dev->irq);
 	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
 			  macio_get_of_node(mdev), 0, 0);

 	return 0;
 }

 static int
 airport_resume(struct macio_dev *mdev)
 {
 	struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
 	struct orinoco_private *priv = netdev_priv(dev);
 	unsigned long flags;
 	int err;

 	printk(KERN_DEBUG "%s: Airport waking up\n", dev->name);

 	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
 			  macio_get_of_node(mdev), 0, 1);
 	msleep(200);

 	enable_irq(dev->irq);

 	err = orinoco_reinit_firmware(dev);
 	if (err) {
 		printk(KERN_ERR "%s: Error %d re-initializing firmware on PBOOK_WAKE\n",
 		       dev->name, err);
 		return 0;
 	}

 	spin_lock_irqsave(&priv->lock, flags);

 	netif_device_attach(dev);

 	priv->hw_unavailable--;

 	if (priv->open && (!priv->hw_unavailable)) {
 		err = __orinoco_up(dev);
 		if (err)
 			printk(KERN_ERR "%s: Error %d restarting card on PBOOK_WAKE\n",
 			       dev->name, err);
 	}


 	spin_unlock_irqrestore(&priv->lock, flags);

 	return 0;
 }

 static int
 airport_detach(struct macio_dev *mdev)
 {
 	struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
 	struct orinoco_private *priv = netdev_priv(dev);
 	struct airport *card = priv->card;

 	if (card->ndev_registered)
 		unregister_netdev(dev);
 	card->ndev_registered = 0;

 	if (card->irq_requested)
 		free_irq(dev->irq, dev);
 	card->irq_requested = 0;

 	if (card->vaddr)
 		iounmap(card->vaddr);
 	card->vaddr = NULL;

 	macio_release_resource(mdev, 0);

 	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
 			  macio_get_of_node(mdev), 0, 0);
 	ssleep(1);

 	macio_set_drvdata(mdev, NULL);
 	free_orinocodev(dev);

 	return 0;
 }

 static int airport_hard_reset(struct orinoco_private *priv)
 {
 	/* It would be nice to power cycle the Airport for a real hard
 	 * reset, but for some reason although it appears to
 	 * re-initialize properly, it falls in a screaming heap
 	 * shortly afterwards. */
 #if 0
 	struct net_device *dev = priv->ndev;
 	struct airport *card = priv->card;

 	/* Vitally important.  If we don't do this it seems we get an
 	 * interrupt somewhere during the power cycle, since
 	 * hw_unavailable is already set it doesn't get ACKed, we get
 	 * into an interrupt loop and the PMU decides to turn us
 	 * off. */
 	disable_irq(dev->irq);

 	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
 			  macio_get_of_node(card->mdev), 0, 0);
 	ssleep(1);
 	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
 			  macio_get_of_node(card->mdev), 0, 1);
 	ssleep(1);

 	enable_irq(dev->irq);
 	ssleep(1);
 #endif

 	return 0;
 }

 static int
 airport_attach(struct macio_dev *mdev, const struct of_device_id *match)
 {
 	struct orinoco_private *priv;
 	struct net_device *dev;
 	struct airport *card;
 	unsigned long phys_addr;
 	hermes_t *hw;

 	if (macio_resource_count(mdev) < 1 || macio_irq_count(mdev) < 1) {
 		printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n");
 		return -ENODEV;
 	}

 	/* Allocate space for private device-specific data */
 	dev = alloc_orinocodev(sizeof(*card), &mdev->ofdev.dev,
 			       airport_hard_reset, NULL);
 	if (!dev) {
 		printk(KERN_ERR PFX "Cannot allocate network device\n");
 		return -ENODEV;
 	}
 	priv = netdev_priv(dev);
 	card = priv->card;

 	hw = &priv->hw;
 	card->mdev = mdev;

 	if (macio_request_resource(mdev, 0, "airport")) {
 		printk(KERN_ERR PFX "can't request IO resource !\n");
 		free_orinocodev(dev);
 		return -EBUSY;
 	}

 	SET_NETDEV_DEV(dev, &mdev->ofdev.dev);

 	macio_set_drvdata(mdev, dev);

 	/* Setup interrupts & base address */
 	dev->irq = macio_irq(mdev, 0);
 	phys_addr = macio_resource_start(mdev, 0);  /* Physical address */
 	printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr);
 	dev->base_addr = phys_addr;
 	card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN);
 	if (!card->vaddr) {
 		printk(KERN_ERR PFX "ioremap() failed\n");
 		goto failed;
 	}

 	hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING);

 	/* Power up card */
 	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
 			  macio_get_of_node(mdev), 0, 1);
 	ssleep(1);

 	/* Reset it before we get the interrupt */
 	hermes_init(hw);

 	if (request_irq(dev->irq, orinoco_interrupt, 0, dev->name, dev)) {
 		printk(KERN_ERR PFX "Couldn't get IRQ %d\n", dev->irq);
 		goto failed;
 	}
 	card->irq_requested = 1;

 	/* Tell the stack we exist */
 	if (register_netdev(dev) != 0) {
 		printk(KERN_ERR PFX "register_netdev() failed\n");
 		goto failed;
 	}
 	printk(KERN_DEBUG PFX "Card registered for interface %s\n", dev->name);
 	card->ndev_registered = 1;
 	return 0;
  failed:
 	airport_detach(mdev);
 	return -ENODEV;
 }				/* airport_attach */


 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
 	" (Benjamin Herrenschmidt <benh@kernel.crashing.org>)";
 MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
 MODULE_DESCRIPTION("Driver for the Apple Airport wireless card.");
 MODULE_LICENSE("Dual MPL/GPL");

 static struct of_device_id airport_match[] =
 {
 	{
 	.name 		= "radio",
 	},
 	{},
 };

 MODULE_DEVICE_TABLE(of, airport_match);

 static struct macio_driver airport_driver = {
 	.name 		= DRIVER_NAME,
 	.match_table	= airport_match,
 	.probe		= airport_attach,
 	.remove		= airport_detach,
 	.suspend	= airport_suspend,
 	.resume		= airport_resume,
 };

 static int __init
 init_airport(void)
 {
 	printk(KERN_DEBUG "%s\n", version);

 	return macio_register_driver(&airport_driver);
 }

 static void __exit
 exit_airport(void)
 {
 	macio_unregister_driver(&airport_driver);
 }

 module_init(init_airport);
 module_exit(exit_airport);
	/* airport.c
	*
	* A driver for "Hermes" chipset based Apple Airport wireless
	* card.
	*
	* Copyright notice & release notes in file orinoco.c
	*
	* Note specific to airport stub:
	*
	* 0.05 : first version of the new split driver
	* 0.06 : fix possible hang on powerup, add sleep support
	*/

	#define DRIVER_NAME "airport"
	#define PFX DRIVER_NAME ": "

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

	#include "orinoco.h"

	#define AIRPORT_IO_LEN (0x1000) /* one page */

	struct airport {
	struct macio_dev *mdev;
	void __iomem *vaddr;
	int irq_requested;
	int ndev_registered;
	};

	static int
	airport_suspend(struct macio_dev *mdev, pm_message_t state)
	{
	struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
	struct orinoco_private *priv = netdev_priv(dev);
	unsigned long flags;
	int err;

	printk(KERN_DEBUG "%s: Airport entering sleep mode\n", dev->name);

	err = orinoco_lock(priv, &flags);
	if (err) {
	printk(KERN_ERR "%s: hw_unavailable on PBOOK_SLEEP_NOW\n",
	dev->name);
	return 0;
	}

	err = __orinoco_down(dev);
	if (err)
	printk(KERN_WARNING "%s: PBOOK_SLEEP_NOW: Error %d downing interface\n",
	dev->name, err);

	netif_device_detach(dev);

	priv->hw_unavailable++;

	orinoco_unlock(priv, &flags);

	disable_irq(dev->irq);
	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
	macio_get_of_node(mdev), 0, 0);

	return 0;
	}

	static int
	airport_resume(struct macio_dev *mdev)
	{
	struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
	struct orinoco_private *priv = netdev_priv(dev);
	unsigned long flags;
	int err;

	printk(KERN_DEBUG "%s: Airport waking up\n", dev->name);

	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
	macio_get_of_node(mdev), 0, 1);
	msleep(200);

	enable_irq(dev->irq);

	err = orinoco_reinit_firmware(dev);
	if (err) {
	printk(KERN_ERR "%s: Error %d re-initializing firmware on PBOOK_WAKE\n",
	dev->name, err);
	return 0;
	}

	spin_lock_irqsave(&priv->lock, flags);

	netif_device_attach(dev);

	priv->hw_unavailable--;

	if (priv->open && (!priv->hw_unavailable)) {
	err = __orinoco_up(dev);
	if (err)
	printk(KERN_ERR "%s: Error %d restarting card on PBOOK_WAKE\n",
	dev->name, err);
	}


	spin_unlock_irqrestore(&priv->lock, flags);

	return 0;
	}

	static int
	airport_detach(struct macio_dev *mdev)
	{
	struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
	struct orinoco_private *priv = netdev_priv(dev);
	struct airport *card = priv->card;

	if (card->ndev_registered)
	unregister_netdev(dev);
	card->ndev_registered = 0;

	if (card->irq_requested)
	free_irq(dev->irq, dev);
	card->irq_requested = 0;

	if (card->vaddr)
	iounmap(card->vaddr);
	card->vaddr = NULL;

	macio_release_resource(mdev, 0);

	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
	macio_get_of_node(mdev), 0, 0);
	ssleep(1);

	macio_set_drvdata(mdev, NULL);
	free_orinocodev(dev);

	return 0;
	}

	static int airport_hard_reset(struct orinoco_private *priv)
	{
	/* It would be nice to power cycle the Airport for a real hard
	* reset, but for some reason although it appears to
	* re-initialize properly, it falls in a screaming heap
	* shortly afterwards. */
	#if 0
	struct net_device *dev = priv->ndev;
	struct airport *card = priv->card;

	/* Vitally important. If we don't do this it seems we get an
	* interrupt somewhere during the power cycle, since
	* hw_unavailable is already set it doesn't get ACKed, we get
	* into an interrupt loop and the PMU decides to turn us
	* off. */
	disable_irq(dev->irq);

	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
	macio_get_of_node(card->mdev), 0, 0);
	ssleep(1);
	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
	macio_get_of_node(card->mdev), 0, 1);
	ssleep(1);

	enable_irq(dev->irq);
	ssleep(1);
	#endif

	return 0;
	}

	static int
	airport_attach(struct macio_dev mdev, const struct of_device_id match)
	{
	struct orinoco_private *priv;
	struct net_device *dev;
	struct airport *card;
	unsigned long phys_addr;
	hermes_t *hw;

	if (macio_resource_count(mdev) < 1 \|\| macio_irq_count(mdev) < 1) {
	printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n");
	return -ENODEV;
	}

	/* Allocate space for private device-specific data */
	dev = alloc_orinocodev(sizeof(*card), &mdev->ofdev.dev,
	airport_hard_reset, NULL);
	if (!dev) {
	printk(KERN_ERR PFX "Cannot allocate network device\n");
	return -ENODEV;
	}
	priv = netdev_priv(dev);
	card = priv->card;

	hw = &priv->hw;
	card->mdev = mdev;

	if (macio_request_resource(mdev, 0, "airport")) {
	printk(KERN_ERR PFX "can't request IO resource !\n");
	free_orinocodev(dev);
	return -EBUSY;
	}

	SET_NETDEV_DEV(dev, &mdev->ofdev.dev);

	macio_set_drvdata(mdev, dev);

	/* Setup interrupts & base address */
	dev->irq = macio_irq(mdev, 0);
	phys_addr = macio_resource_start(mdev, 0); /* Physical address */
	printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr);
	dev->base_addr = phys_addr;
	card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN);
	if (!card->vaddr) {
	printk(KERN_ERR PFX "ioremap() failed\n");
	goto failed;
	}

	hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING);

	/* Power up card */
	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
	macio_get_of_node(mdev), 0, 1);
	ssleep(1);

	/* Reset it before we get the interrupt */
	hermes_init(hw);

	if (request_irq(dev->irq, orinoco_interrupt, 0, dev->name, dev)) {
	printk(KERN_ERR PFX "Couldn't get IRQ %d\n", dev->irq);
	goto failed;
	}
	card->irq_requested = 1;

	/* Tell the stack we exist */
	if (register_netdev(dev) != 0) {
	printk(KERN_ERR PFX "register_netdev() failed\n");
	goto failed;
	}
	printk(KERN_DEBUG PFX "Card registered for interface %s\n", dev->name);
	card->ndev_registered = 1;
	return 0;
	failed:
	airport_detach(mdev);
	return -ENODEV;
	} /* airport_attach */


	static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
	" (Benjamin Herrenschmidt <benh@kernel.crashing.org>)";
	MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
	MODULE_DESCRIPTION("Driver for the Apple Airport wireless card.");
	MODULE_LICENSE("Dual MPL/GPL");

	static struct of_device_id airport_match[] =
	{
	{
	.name = "radio",
	},
	{},
	};

	MODULE_DEVICE_TABLE(of, airport_match);

	static struct macio_driver airport_driver = {
	.name = DRIVER_NAME,
	.match_table = airport_match,
	.probe = airport_attach,
	.remove = airport_detach,
	.suspend = airport_suspend,
	.resume = airport_resume,
	};

	static int __init
	init_airport(void)
	{
	printk(KERN_DEBUG "%s\n", version);

	return macio_register_driver(&airport_driver);
	}

	static void __exit
	exit_airport(void)
	{
	macio_unregister_driver(&airport_driver);
	}

	module_init(init_airport);
	module_exit(exit_airport);