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