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267 lines
6.1 KiB
267 lines
6.1 KiB
/* airport.c |
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* |
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* A driver for "Hermes" chipset based Apple Airport wireless |
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* card. |
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* |
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* Copyright notice & release notes in file main.c |
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* |
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* Note specific to airport stub: |
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* |
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* 0.05 : first version of the new split driver |
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* 0.06 : fix possible hang on powerup, add sleep support |
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*/ |
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#define DRIVER_NAME "airport" |
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#define PFX DRIVER_NAME ": " |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <asm/pmac_feature.h> |
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#include "orinoco.h" |
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#define AIRPORT_IO_LEN (0x1000) /* one page */ |
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struct airport { |
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struct macio_dev *mdev; |
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void __iomem *vaddr; |
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unsigned int irq; |
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int irq_requested; |
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int ndev_registered; |
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}; |
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static int |
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airport_suspend(struct macio_dev *mdev, pm_message_t state) |
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{ |
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struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev); |
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struct net_device *dev = priv->ndev; |
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struct airport *card = priv->card; |
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unsigned long flags; |
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int err; |
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printk(KERN_DEBUG "%s: Airport entering sleep mode\n", dev->name); |
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err = orinoco_lock(priv, &flags); |
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if (err) { |
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printk(KERN_ERR "%s: hw_unavailable on PBOOK_SLEEP_NOW\n", |
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dev->name); |
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return 0; |
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} |
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orinoco_down(priv); |
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orinoco_unlock(priv, &flags); |
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disable_irq(card->irq); |
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pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, |
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macio_get_of_node(mdev), 0, 0); |
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return 0; |
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} |
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static int |
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airport_resume(struct macio_dev *mdev) |
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{ |
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struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev); |
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struct net_device *dev = priv->ndev; |
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struct airport *card = priv->card; |
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unsigned long flags; |
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int err; |
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printk(KERN_DEBUG "%s: Airport waking up\n", dev->name); |
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pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, |
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macio_get_of_node(mdev), 0, 1); |
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msleep(200); |
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enable_irq(card->irq); |
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priv->hw.ops->lock_irqsave(&priv->lock, &flags); |
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err = orinoco_up(priv); |
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priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); |
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return err; |
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} |
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static int |
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airport_detach(struct macio_dev *mdev) |
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{ |
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struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev); |
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struct airport *card = priv->card; |
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if (card->ndev_registered) |
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orinoco_if_del(priv); |
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card->ndev_registered = 0; |
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if (card->irq_requested) |
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free_irq(card->irq, priv); |
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card->irq_requested = 0; |
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if (card->vaddr) |
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iounmap(card->vaddr); |
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card->vaddr = NULL; |
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macio_release_resource(mdev, 0); |
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pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, |
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macio_get_of_node(mdev), 0, 0); |
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ssleep(1); |
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macio_set_drvdata(mdev, NULL); |
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free_orinocodev(priv); |
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return 0; |
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} |
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static int airport_hard_reset(struct orinoco_private *priv) |
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{ |
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/* It would be nice to power cycle the Airport for a real hard |
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* reset, but for some reason although it appears to |
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* re-initialize properly, it falls in a screaming heap |
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* shortly afterwards. */ |
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#if 0 |
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struct airport *card = priv->card; |
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/* Vitally important. If we don't do this it seems we get an |
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* interrupt somewhere during the power cycle, since |
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* hw_unavailable is already set it doesn't get ACKed, we get |
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* into an interrupt loop and the PMU decides to turn us |
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* off. */ |
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disable_irq(card->irq); |
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pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, |
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macio_get_of_node(card->mdev), 0, 0); |
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ssleep(1); |
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pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, |
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macio_get_of_node(card->mdev), 0, 1); |
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ssleep(1); |
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enable_irq(card->irq); |
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ssleep(1); |
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#endif |
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return 0; |
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} |
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static int |
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airport_attach(struct macio_dev *mdev, const struct of_device_id *match) |
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{ |
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struct orinoco_private *priv; |
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struct airport *card; |
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unsigned long phys_addr; |
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struct hermes *hw; |
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if (macio_resource_count(mdev) < 1 || macio_irq_count(mdev) < 1) { |
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printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n"); |
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return -ENODEV; |
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} |
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/* Allocate space for private device-specific data */ |
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priv = alloc_orinocodev(sizeof(*card), &mdev->ofdev.dev, |
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airport_hard_reset, NULL); |
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if (!priv) { |
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printk(KERN_ERR PFX "Cannot allocate network device\n"); |
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return -ENODEV; |
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} |
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card = priv->card; |
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hw = &priv->hw; |
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card->mdev = mdev; |
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if (macio_request_resource(mdev, 0, DRIVER_NAME)) { |
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printk(KERN_ERR PFX "can't request IO resource !\n"); |
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free_orinocodev(priv); |
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return -EBUSY; |
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} |
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macio_set_drvdata(mdev, priv); |
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/* Setup interrupts & base address */ |
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card->irq = macio_irq(mdev, 0); |
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phys_addr = macio_resource_start(mdev, 0); /* Physical address */ |
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printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr); |
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card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN); |
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if (!card->vaddr) { |
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printk(KERN_ERR PFX "ioremap() failed\n"); |
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goto failed; |
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} |
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hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING); |
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/* Power up card */ |
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pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, |
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macio_get_of_node(mdev), 0, 1); |
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ssleep(1); |
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/* Reset it before we get the interrupt */ |
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hw->ops->init(hw); |
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if (request_irq(card->irq, orinoco_interrupt, 0, DRIVER_NAME, priv)) { |
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printk(KERN_ERR PFX "Couldn't get IRQ %d\n", card->irq); |
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goto failed; |
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} |
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card->irq_requested = 1; |
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/* Initialise the main driver */ |
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if (orinoco_init(priv) != 0) { |
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printk(KERN_ERR PFX "orinoco_init() failed\n"); |
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goto failed; |
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} |
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/* Register an interface with the stack */ |
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if (orinoco_if_add(priv, phys_addr, card->irq, NULL) != 0) { |
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printk(KERN_ERR PFX "orinoco_if_add() failed\n"); |
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goto failed; |
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} |
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card->ndev_registered = 1; |
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return 0; |
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failed: |
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airport_detach(mdev); |
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return -ENODEV; |
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} /* airport_attach */ |
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static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION |
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" (Benjamin Herrenschmidt <[email protected]>)"; |
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MODULE_AUTHOR("Benjamin Herrenschmidt <[email protected]>"); |
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MODULE_DESCRIPTION("Driver for the Apple Airport wireless card."); |
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MODULE_LICENSE("Dual MPL/GPL"); |
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static const struct of_device_id airport_match[] = { |
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{ |
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.name = "radio", |
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}, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, airport_match); |
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static struct macio_driver airport_driver = { |
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.driver = { |
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.name = DRIVER_NAME, |
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.owner = THIS_MODULE, |
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.of_match_table = airport_match, |
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}, |
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.probe = airport_attach, |
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.remove = airport_detach, |
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.suspend = airport_suspend, |
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.resume = airport_resume, |
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}; |
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static int __init |
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init_airport(void) |
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{ |
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printk(KERN_DEBUG "%s\n", version); |
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return macio_register_driver(&airport_driver); |
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} |
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static void __exit |
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exit_airport(void) |
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{ |
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macio_unregister_driver(&airport_driver); |
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} |
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module_init(init_airport); |
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module_exit(exit_airport);
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