/* 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/config.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/ptrace.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/ioport.h> #include <linux/netdevice.h> #include <linux/if_arp.h> #include <linux/etherdevice.h> #include <linux/wireless.h> #include <asm/io.h> #include <asm/system.h> #include <asm/current.h> #include <asm/prom.h> #include <asm/machdep.h> #include <asm/pmac_feature.h> #include <asm/irq.h> #include <asm/uaccess.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 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_match *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), airport_hard_reset); 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_MODULE_OWNER(dev); 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_match airport_match[] = { { .name = "radio", .type = OF_ANY_MATCH, .compatible = OF_ANY_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) { return macio_unregister_driver(&airport_driver); } module_init(init_airport); module_exit(exit_airport);