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 const 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