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 <linux/of_device.h> 22 #include <asm/pmac_feature.h> 23 24 #include "orinoco.h" 25 26 #define AIRPORT_IO_LEN (0x1000) /* one page */ 27 28 struct airport { 29 struct macio_dev *mdev; 30 void __iomem *vaddr; 31 unsigned int irq; 32 int irq_requested; 33 int ndev_registered; 34 }; 35 36 static int 37 airport_suspend(struct macio_dev *mdev, pm_message_t state) 38 { 39 struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev); 40 struct net_device *dev = priv->ndev; 41 struct airport *card = priv->card; 42 unsigned long flags; 43 int err; 44 45 printk(KERN_DEBUG "%s: Airport entering sleep mode\n", dev->name); 46 47 err = orinoco_lock(priv, &flags); 48 if (err) { 49 printk(KERN_ERR "%s: hw_unavailable on PBOOK_SLEEP_NOW\n", 50 dev->name); 51 return 0; 52 } 53 54 orinoco_down(priv); 55 orinoco_unlock(priv, &flags); 56 57 disable_irq(card->irq); 58 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, 59 macio_get_of_node(mdev), 0, 0); 60 61 return 0; 62 } 63 64 static int 65 airport_resume(struct macio_dev *mdev) 66 { 67 struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev); 68 struct net_device *dev = priv->ndev; 69 struct airport *card = priv->card; 70 unsigned long flags; 71 int err; 72 73 printk(KERN_DEBUG "%s: Airport waking up\n", dev->name); 74 75 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, 76 macio_get_of_node(mdev), 0, 1); 77 msleep(200); 78 79 enable_irq(card->irq); 80 81 priv->hw.ops->lock_irqsave(&priv->lock, &flags); 82 err = orinoco_up(priv); 83 priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); 84 85 return err; 86 } 87 88 static int 89 airport_detach(struct macio_dev *mdev) 90 { 91 struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev); 92 struct airport *card = priv->card; 93 94 if (card->ndev_registered) 95 orinoco_if_del(priv); 96 card->ndev_registered = 0; 97 98 if (card->irq_requested) 99 free_irq(card->irq, priv); 100 card->irq_requested = 0; 101 102 if (card->vaddr) 103 iounmap(card->vaddr); 104 card->vaddr = NULL; 105 106 macio_release_resource(mdev, 0); 107 108 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, 109 macio_get_of_node(mdev), 0, 0); 110 ssleep(1); 111 112 macio_set_drvdata(mdev, NULL); 113 free_orinocodev(priv); 114 115 return 0; 116 } 117 118 static int airport_hard_reset(struct orinoco_private *priv) 119 { 120 /* It would be nice to power cycle the Airport for a real hard 121 * reset, but for some reason although it appears to 122 * re-initialize properly, it falls in a screaming heap 123 * shortly afterwards. */ 124 #if 0 125 struct airport *card = priv->card; 126 127 /* Vitally important. If we don't do this it seems we get an 128 * interrupt somewhere during the power cycle, since 129 * hw_unavailable is already set it doesn't get ACKed, we get 130 * into an interrupt loop and the PMU decides to turn us 131 * off. */ 132 disable_irq(card->irq); 133 134 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, 135 macio_get_of_node(card->mdev), 0, 0); 136 ssleep(1); 137 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, 138 macio_get_of_node(card->mdev), 0, 1); 139 ssleep(1); 140 141 enable_irq(card->irq); 142 ssleep(1); 143 #endif 144 145 return 0; 146 } 147 148 static int 149 airport_attach(struct macio_dev *mdev, const struct of_device_id *match) 150 { 151 struct orinoco_private *priv; 152 struct airport *card; 153 unsigned long phys_addr; 154 struct hermes *hw; 155 156 if (macio_resource_count(mdev) < 1 || macio_irq_count(mdev) < 1) { 157 printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n"); 158 return -ENODEV; 159 } 160 161 /* Allocate space for private device-specific data */ 162 priv = alloc_orinocodev(sizeof(*card), &mdev->ofdev.dev, 163 airport_hard_reset, NULL); 164 if (!priv) { 165 printk(KERN_ERR PFX "Cannot allocate network device\n"); 166 return -ENODEV; 167 } 168 card = priv->card; 169 170 hw = &priv->hw; 171 card->mdev = mdev; 172 173 if (macio_request_resource(mdev, 0, DRIVER_NAME)) { 174 printk(KERN_ERR PFX "can't request IO resource !\n"); 175 free_orinocodev(priv); 176 return -EBUSY; 177 } 178 179 macio_set_drvdata(mdev, priv); 180 181 /* Setup interrupts & base address */ 182 card->irq = macio_irq(mdev, 0); 183 phys_addr = macio_resource_start(mdev, 0); /* Physical address */ 184 printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr); 185 card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN); 186 if (!card->vaddr) { 187 printk(KERN_ERR PFX "ioremap() failed\n"); 188 goto failed; 189 } 190 191 hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING); 192 193 /* Power up card */ 194 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, 195 macio_get_of_node(mdev), 0, 1); 196 ssleep(1); 197 198 /* Reset it before we get the interrupt */ 199 hw->ops->init(hw); 200 201 if (request_irq(card->irq, orinoco_interrupt, 0, DRIVER_NAME, priv)) { 202 printk(KERN_ERR PFX "Couldn't get IRQ %d\n", card->irq); 203 goto failed; 204 } 205 card->irq_requested = 1; 206 207 /* Initialise the main driver */ 208 if (orinoco_init(priv) != 0) { 209 printk(KERN_ERR PFX "orinoco_init() failed\n"); 210 goto failed; 211 } 212 213 /* Register an interface with the stack */ 214 if (orinoco_if_add(priv, phys_addr, card->irq, NULL) != 0) { 215 printk(KERN_ERR PFX "orinoco_if_add() failed\n"); 216 goto failed; 217 } 218 card->ndev_registered = 1; 219 return 0; 220 failed: 221 airport_detach(mdev); 222 return -ENODEV; 223 } /* airport_attach */ 224 225 226 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION 227 " (Benjamin Herrenschmidt <benh@kernel.crashing.org>)"; 228 MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>"); 229 MODULE_DESCRIPTION("Driver for the Apple Airport wireless card."); 230 MODULE_LICENSE("Dual MPL/GPL"); 231 232 static const struct of_device_id airport_match[] = { 233 { 234 .name = "radio", 235 }, 236 {}, 237 }; 238 239 MODULE_DEVICE_TABLE(of, airport_match); 240 241 static struct macio_driver airport_driver = { 242 .driver = { 243 .name = DRIVER_NAME, 244 .owner = THIS_MODULE, 245 .of_match_table = airport_match, 246 }, 247 .probe = airport_attach, 248 .remove = airport_detach, 249 .suspend = airport_suspend, 250 .resume = airport_resume, 251 }; 252 253 static int __init 254 init_airport(void) 255 { 256 printk(KERN_DEBUG "%s\n", version); 257 258 return macio_register_driver(&airport_driver); 259 } 260 261 static void __exit 262 exit_airport(void) 263 { 264 macio_unregister_driver(&airport_driver); 265 } 266 267 module_init(init_airport); 268 module_exit(exit_airport); 269