Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/net/wireless/orinoco/airport.c

  1 /* airport.c
  2  *
  3  * A driver for "Hermes" chipset based Apple Airport wireless
  4  * card.
  5  *
  6  * Copyright notice & release notes in file main.c
  7  *
  8  * Note specific to airport stub:
  9  *
 10  *  0.05 : first version of the new split driver
 11  *  0.06 : fix possible hang on powerup, add sleep support
 12  */
 13 
 14 #define DRIVER_NAME "airport"
 15 #define PFX DRIVER_NAME ": "
 16 
 17 #include <linux/module.h>
 18 #include <linux/kernel.h>
 19 #include <linux/init.h>
 20 #include <linux/delay.h>
 21 #include <asm/pmac_feature.h>
 22 
 23 #include "orinoco.h"
 24 
 25 #define AIRPORT_IO_LEN  (0x1000)        /* one page */
 26 
 27 struct airport {
 28         struct macio_dev *mdev;
 29         void __iomem *vaddr;
 30         unsigned int irq;
 31         int irq_requested;
 32         int ndev_registered;
 33 };
 34 
 35 static int
 36 airport_suspend(struct macio_dev *mdev, pm_message_t state)
 37 {
 38         struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
 39         struct net_device *dev = priv->ndev;
 40         struct airport *card = priv->card;
 41         unsigned long flags;
 42         int err;
 43 
 44         printk(KERN_DEBUG "%s: Airport entering sleep mode\n", dev->name);
 45 
 46         err = orinoco_lock(priv, &flags);
 47         if (err) {
 48                 printk(KERN_ERR "%s: hw_unavailable on PBOOK_SLEEP_NOW\n",
 49                        dev->name);
 50                 return 0;
 51         }
 52 
 53         orinoco_down(priv);
 54         orinoco_unlock(priv, &flags);
 55 
 56         disable_irq(card->irq);
 57         pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
 58                           macio_get_of_node(mdev), 0, 0);
 59 
 60         return 0;
 61 }
 62 
 63 static int
 64 airport_resume(struct macio_dev *mdev)
 65 {
 66         struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
 67         struct net_device *dev = priv->ndev;
 68         struct airport *card = priv->card;
 69         unsigned long flags;
 70         int err;
 71 
 72         printk(KERN_DEBUG "%s: Airport waking up\n", dev->name);
 73 
 74         pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
 75                           macio_get_of_node(mdev), 0, 1);
 76         msleep(200);
 77 
 78         enable_irq(card->irq);
 79 
 80         priv->hw.ops->lock_irqsave(&priv->lock, &flags);
 81         err = orinoco_up(priv);
 82         priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
 83 
 84         return err;
 85 }
 86 
 87 static int
 88 airport_detach(struct macio_dev *mdev)
 89 {
 90         struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
 91         struct airport *card = priv->card;
 92 
 93         if (card->ndev_registered)
 94                 orinoco_if_del(priv);
 95         card->ndev_registered = 0;
 96 
 97         if (card->irq_requested)
 98                 free_irq(card->irq, priv);
 99         card->irq_requested = 0;
100 
101         if (card->vaddr)
102                 iounmap(card->vaddr);
103         card->vaddr = NULL;
104 
105         macio_release_resource(mdev, 0);
106 
107         pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
108                           macio_get_of_node(mdev), 0, 0);
109         ssleep(1);
110 
111         macio_set_drvdata(mdev, NULL);
112         free_orinocodev(priv);
113 
114         return 0;
115 }
116 
117 static int airport_hard_reset(struct orinoco_private *priv)
118 {
119         /* It would be nice to power cycle the Airport for a real hard
120          * reset, but for some reason although it appears to
121          * re-initialize properly, it falls in a screaming heap
122          * shortly afterwards. */
123 #if 0
124         struct airport *card = priv->card;
125 
126         /* Vitally important.  If we don't do this it seems we get an
127          * interrupt somewhere during the power cycle, since
128          * hw_unavailable is already set it doesn't get ACKed, we get
129          * into an interrupt loop and the PMU decides to turn us
130          * off. */
131         disable_irq(card->irq);
132 
133         pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
134                           macio_get_of_node(card->mdev), 0, 0);
135         ssleep(1);
136         pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
137                           macio_get_of_node(card->mdev), 0, 1);
138         ssleep(1);
139 
140         enable_irq(card->irq);
141         ssleep(1);
142 #endif
143 
144         return 0;
145 }
146 
147 static int
148 airport_attach(struct macio_dev *mdev, const struct of_device_id *match)
149 {
150         struct orinoco_private *priv;
151         struct airport *card;
152         unsigned long phys_addr;
153         struct hermes *hw;
154 
155         if (macio_resource_count(mdev) < 1 || macio_irq_count(mdev) < 1) {
156                 printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n");
157                 return -ENODEV;
158         }
159 
160         /* Allocate space for private device-specific data */
161         priv = alloc_orinocodev(sizeof(*card), &mdev->ofdev.dev,
162                                 airport_hard_reset, NULL);
163         if (!priv) {
164                 printk(KERN_ERR PFX "Cannot allocate network device\n");
165                 return -ENODEV;
166         }
167         card = priv->card;
168 
169         hw = &priv->hw;
170         card->mdev = mdev;
171 
172         if (macio_request_resource(mdev, 0, DRIVER_NAME)) {
173                 printk(KERN_ERR PFX "can't request IO resource !\n");
174                 free_orinocodev(priv);
175                 return -EBUSY;
176         }
177 
178         macio_set_drvdata(mdev, priv);
179 
180         /* Setup interrupts & base address */
181         card->irq = macio_irq(mdev, 0);
182         phys_addr = macio_resource_start(mdev, 0);  /* Physical address */
183         printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr);
184         card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN);
185         if (!card->vaddr) {
186                 printk(KERN_ERR PFX "ioremap() failed\n");
187                 goto failed;
188         }
189 
190         hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING);
191 
192         /* Power up card */
193         pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
194                           macio_get_of_node(mdev), 0, 1);
195         ssleep(1);
196 
197         /* Reset it before we get the interrupt */
198         hw->ops->init(hw);
199 
200         if (request_irq(card->irq, orinoco_interrupt, 0, DRIVER_NAME, priv)) {
201                 printk(KERN_ERR PFX "Couldn't get IRQ %d\n", card->irq);
202                 goto failed;
203         }
204         card->irq_requested = 1;
205 
206         /* Initialise the main driver */
207         if (orinoco_init(priv) != 0) {
208                 printk(KERN_ERR PFX "orinoco_init() failed\n");
209                 goto failed;
210         }
211 
212         /* Register an interface with the stack */
213         if (orinoco_if_add(priv, phys_addr, card->irq, NULL) != 0) {
214                 printk(KERN_ERR PFX "orinoco_if_add() failed\n");
215                 goto failed;
216         }
217         card->ndev_registered = 1;
218         return 0;
219  failed:
220         airport_detach(mdev);
221         return -ENODEV;
222 }                               /* airport_attach */
223 
224 
225 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
226         " (Benjamin Herrenschmidt <benh@kernel.crashing.org>)";
227 MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
228 MODULE_DESCRIPTION("Driver for the Apple Airport wireless card.");
229 MODULE_LICENSE("Dual MPL/GPL");
230 
231 static struct of_device_id airport_match[] = {
232         {
233         .name           = "radio",
234         },
235         {},
236 };
237 
238 MODULE_DEVICE_TABLE(of, airport_match);
239 
240 static struct macio_driver airport_driver = {
241         .driver = {
242                 .name           = DRIVER_NAME,
243                 .owner          = THIS_MODULE,
244                 .of_match_table = airport_match,
245         },
246         .probe          = airport_attach,
247         .remove         = airport_detach,
248         .suspend        = airport_suspend,
249         .resume         = airport_resume,
250 };
251 
252 static int __init
253 init_airport(void)
254 {
255         printk(KERN_DEBUG "%s\n", version);
256 
257         return macio_register_driver(&airport_driver);
258 }
259 
260 static void __exit
261 exit_airport(void)
262 {
263         macio_unregister_driver(&airport_driver);
264 }
265 
266 module_init(init_airport);
267 module_exit(exit_airport);
268 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us