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/* airport.c
*
* A driver for "Hermes" chipset based Apple Airport wireless
* card.
*
* Copyright notice & release notes in file main.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);
|
