airport.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:8k
- /* airport.c 0.11b
- *
- * 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
- */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/sched.h>
- #include <linux/ptrace.h>
- #include <linux/slab.h>
- #include <linux/string.h>
- #include <linux/timer.h>
- #include <linux/ioport.h>
- #include <asm/uaccess.h>
- #include <asm/io.h>
- #include <asm/system.h>
- #include <linux/proc_fs.h>
- #include <linux/netdevice.h>
- #include <linux/if_arp.h>
- #include <linux/etherdevice.h>
- #include <linux/wireless.h>
- #include <linux/list.h>
- #include <linux/adb.h>
- #include <linux/pmu.h>
- #include <asm/prom.h>
- #include <asm/machdep.h>
- #include <asm/pmac_feature.h>
- #include <asm/irq.h>
- #include "hermes.h"
- #include "orinoco.h"
- static char version[] __initdata = "airport.c 0.11b (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");
- EXPORT_NO_SYMBOLS;
- #define AIRPORT_IO_LEN (0x1000) /* one page */
- struct airport {
- struct device_node* node;
- void *vaddr;
- int irq_requested;
- int ndev_registered;
- int open;
- };
- #ifdef CONFIG_PMAC_PBOOK
- static int airport_sleep_notify(struct pmu_sleep_notifier *self, int when);
- static struct pmu_sleep_notifier airport_sleep_notifier = {
- airport_sleep_notify, SLEEP_LEVEL_NET,
- };
- #endif
- /*
- * Function prototypes
- */
- static struct net_device *airport_attach(struct device_node *of_node);
- static void airport_detach(struct net_device *dev);
- static int airport_open(struct net_device *dev);
- static int airport_stop(struct net_device *dev);
- /*
- A linked list of "instances" of the dummy device. Each actual
- PCMCIA card corresponds to one device instance, and is described
- by one dev_link_t structure (defined in ds.h).
- You may not want to use a linked list for this -- for example, the
- memory card driver uses an array of dev_link_t pointers, where minor
- device numbers are used to derive the corresponding array index.
- */
- static struct net_device *airport_dev;
- static int
- airport_open(struct net_device *dev)
- {
- struct orinoco_private *priv = dev->priv;
- struct airport* card = (struct airport *)priv->card;
- int rc;
- TRACE_ENTER(dev->name);
- netif_device_attach(dev);
- rc = orinoco_reset(priv);
- if (rc)
- airport_stop(dev);
- else {
- card->open = 1;
- netif_start_queue(dev);
- }
- TRACE_EXIT(dev->name);
- return rc;
- }
- static int
- airport_stop(struct net_device *dev)
- {
- struct orinoco_private *priv = dev->priv;
- struct airport* card = (struct airport *)priv->card;
- TRACE_ENTER(dev->name);
- netif_stop_queue(dev);
- orinoco_shutdown(priv);
- card->open = 0;
- TRACE_EXIT(dev->name);
- return 0;
- }
- #ifdef CONFIG_PMAC_PBOOK
- static int
- airport_sleep_notify(struct pmu_sleep_notifier *self, int when)
- {
- struct net_device *dev = airport_dev;
- struct orinoco_private *priv = (struct orinoco_private *)dev->priv;
- struct hermes *hw = &priv->hw;
- struct airport* card = (struct airport *)priv->card;
- int rc;
-
- if (! airport_dev)
- return PBOOK_SLEEP_OK;
- switch (when) {
- case PBOOK_SLEEP_REQUEST:
- break;
- case PBOOK_SLEEP_REJECT:
- break;
- case PBOOK_SLEEP_NOW:
- printk(KERN_INFO "%s: Airport entering sleep moden", dev->name);
- if (card->open) {
- netif_stop_queue(dev);
- orinoco_shutdown(priv);
- netif_device_detach(dev);
- }
- disable_irq(dev->irq);
- pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, card->node, 0, 0);
- break;
- case PBOOK_WAKE:
- printk(KERN_INFO "%s: Airport waking upn", dev->name);
- pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, card->node, 0, 1);
- mdelay(200);
- hermes_reset(hw);
- rc = orinoco_reset(priv);
- if (rc)
- printk(KERN_ERR "airport: Error %d re-initing card !n", rc);
- else if (card->open)
- netif_device_attach(dev);
- enable_irq(dev->irq);
- break;
- }
- return PBOOK_SLEEP_OK;
- }
- #endif /* CONFIG_PMAC_PBOOK */
- static struct net_device *
- airport_attach(struct device_node* of_node)
- {
- struct orinoco_private *priv;
- struct net_device *dev;
- struct airport *card;
- unsigned long phys_addr;
- hermes_t *hw;
- TRACE_ENTER("orinoco");
- if (of_node->n_addrs < 1 || of_node->n_intrs < 1) {
- printk(KERN_ERR "airport: wrong interrupt/addresses in OF treen");
- return NULL;
- }
- /* Allocate space for private device-specific data */
- dev = alloc_orinocodev(sizeof(*card));
- if (! dev) {
- printk(KERN_ERR "airport: can't allocate device datasn");
- return NULL;
- }
- priv = dev->priv;
- card = priv->card;
- hw = &priv->hw;
- card->node = of_node;
- if (! request_OF_resource(of_node, 0, " (airport)")) {
- printk(KERN_ERR "airport: can't request IO resource !n");
- kfree(dev);
- return NULL;
- }
-
- dev->name[0] = ' '; /* register_netdev will give us an ethX name */
- SET_MODULE_OWNER(dev);
- /* Overrides */
- dev->open = airport_open;
- dev->stop = airport_stop;
- /* Setup interrupts & base address */
- dev->irq = of_node->intrs[0].line;
- phys_addr = of_node->addrs[0].address; /* Physical address */
- dev->base_addr = phys_addr;
- card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN);
- if (! card->vaddr) {
- printk("airport: ioremap() failedn");
- goto failed;
- }
- hermes_struct_init(hw, (ulong)card->vaddr,
- HERMES_MEM, HERMES_16BIT_REGSPACING);
-
- /* Power up card */
- pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, card->node, 0, 1);
- current->state = TASK_UNINTERRUPTIBLE;
- schedule_timeout(HZ);
- /* Reset it before we get the interrupt */
- hermes_reset(hw);
- if (request_irq(dev->irq, orinoco_interrupt, 0, "Airport", (void *)priv)) {
- printk(KERN_ERR "airport: Couldn't get IRQ %dn", dev->irq);
- goto failed;
- }
- card->irq_requested = 1;
-
- /* Tell the stack we exist */
- if (register_netdev(dev) != 0) {
- printk(KERN_ERR "airport: register_netdev() failedn");
- goto failed;
- }
- printk(KERN_DEBUG "airport: card registered for interface %sn", dev->name);
- card->ndev_registered = 1;
- /* And give us the proc nodes for debugging */
- if (orinoco_proc_dev_init(priv) != 0)
- printk(KERN_ERR "airport: Failed to create /proc node for %sn",
- dev->name);
- #ifdef CONFIG_PMAC_PBOOK
- pmu_register_sleep_notifier(&airport_sleep_notifier);
- #endif
- return dev;
-
- failed:
- airport_detach(dev);
- return NULL;
- } /* airport_attach */
- /*======================================================================
- This deletes a driver "instance".
- ======================================================================*/
- static void
- airport_detach(struct net_device *dev)
- {
- struct orinoco_private *priv = dev->priv;
- struct airport *card = priv->card;
- /* Unregister proc entry */
- orinoco_proc_dev_cleanup(priv);
- #ifdef CONFIG_PMAC_PBOOK
- pmu_unregister_sleep_notifier(&airport_sleep_notifier);
- #endif
- if (card->ndev_registered)
- unregister_netdev(dev);
- card->ndev_registered = 0;
-
- if (card->irq_requested)
- free_irq(dev->irq, priv);
- card->irq_requested = 0;
- if (card->vaddr)
- iounmap(card->vaddr);
- card->vaddr = 0;
-
- dev->base_addr = 0;
- release_OF_resource(card->node, 0);
-
- pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, card->node, 0, 0);
- current->state = TASK_UNINTERRUPTIBLE;
- schedule_timeout(HZ);
-
- kfree(dev);
- } /* airport_detach */
- static int __init
- init_airport(void)
- {
- struct device_node* airport_node;
- printk(KERN_DEBUG "%sn", version);
- MOD_INC_USE_COUNT;
- /* Lookup card in device tree */
- airport_node = find_devices("radio");
- if (airport_node && !strcmp(airport_node->parent->name, "mac-io"))
- airport_dev = airport_attach(airport_node);
- MOD_DEC_USE_COUNT;
- return airport_dev ? 0 : -ENODEV;
- }
- static void __exit
- exit_airport(void)
- {
- if (airport_dev)
- airport_detach(airport_dev);
- airport_dev = NULL;
- }
- module_init(init_airport);
- module_exit(exit_airport);