269 lines
6.1 KiB
C
269 lines
6.1 KiB
C
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/* 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 <linux/of_device.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 <benh@kernel.crashing.org>)";
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MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
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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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