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path: root/drivers/net/wireless/intersil/orinoco/airport.c
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Diffstat (limited to 'drivers/net/wireless/intersil/orinoco/airport.c')
-rw-r--r--drivers/net/wireless/intersil/orinoco/airport.c267
1 files changed, 267 insertions, 0 deletions
diff --git a/drivers/net/wireless/intersil/orinoco/airport.c b/drivers/net/wireless/intersil/orinoco/airport.c
new file mode 100644
index 0000000..77e6c53
--- /dev/null
+++ b/drivers/net/wireless/intersil/orinoco/airport.c
@@ -0,0 +1,267 @@
+/* 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;
+ unsigned int irq;
+ int irq_requested;
+ int ndev_registered;
+};
+
+static int
+airport_suspend(struct macio_dev *mdev, pm_message_t state)
+{
+ struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
+ struct net_device *dev = priv->ndev;
+ struct airport *card = priv->card;
+ 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;
+ }
+
+ orinoco_down(priv);
+ orinoco_unlock(priv, &flags);
+
+ disable_irq(card->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 orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
+ struct net_device *dev = priv->ndev;
+ struct airport *card = priv->card;
+ 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(card->irq);
+
+ priv->hw.ops->lock_irqsave(&priv->lock, &flags);
+ err = orinoco_up(priv);
+ priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
+
+ return err;
+}
+
+static int
+airport_detach(struct macio_dev *mdev)
+{
+ struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
+ struct airport *card = priv->card;
+
+ if (card->ndev_registered)
+ orinoco_if_del(priv);
+ card->ndev_registered = 0;
+
+ if (card->irq_requested)
+ free_irq(card->irq, priv);
+ 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(priv);
+
+ 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 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(card->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(card->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 airport *card;
+ unsigned long phys_addr;
+ struct hermes *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 */
+ priv = alloc_orinocodev(sizeof(*card), &mdev->ofdev.dev,
+ airport_hard_reset, NULL);
+ if (!priv) {
+ printk(KERN_ERR PFX "Cannot allocate network device\n");
+ return -ENODEV;
+ }
+ card = priv->card;
+
+ hw = &priv->hw;
+ card->mdev = mdev;
+
+ if (macio_request_resource(mdev, 0, DRIVER_NAME)) {
+ printk(KERN_ERR PFX "can't request IO resource !\n");
+ free_orinocodev(priv);
+ return -EBUSY;
+ }
+
+ macio_set_drvdata(mdev, priv);
+
+ /* Setup interrupts & base address */
+ card->irq = macio_irq(mdev, 0);
+ phys_addr = macio_resource_start(mdev, 0); /* Physical address */
+ printk(KERN_DEBUG PFX "Physical address %lx\n", 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 */
+ hw->ops->init(hw);
+
+ if (request_irq(card->irq, orinoco_interrupt, 0, DRIVER_NAME, priv)) {
+ printk(KERN_ERR PFX "Couldn't get IRQ %d\n", card->irq);
+ goto failed;
+ }
+ card->irq_requested = 1;
+
+ /* Initialise the main driver */
+ if (orinoco_init(priv) != 0) {
+ printk(KERN_ERR PFX "orinoco_init() failed\n");
+ goto failed;
+ }
+
+ /* Register an interface with the stack */
+ if (orinoco_if_add(priv, phys_addr, card->irq, NULL) != 0) {
+ printk(KERN_ERR PFX "orinoco_if_add() failed\n");
+ goto failed;
+ }
+ 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 const struct of_device_id airport_match[] = {
+ {
+ .name = "radio",
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, airport_match);
+
+static struct macio_driver airport_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .of_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);