drivers/net/wireless/hostap/hostap_pci.c

   1 #define PRISM2_PCI
   2
   3 /* Host AP driver's support for Intersil Prism2.5 PCI cards is based on
   4  * driver patches from Reyk Floeter <reyk@vantronix.net> and
   5  * Andy Warner <andyw@pobox.com> */
   6
   7 #include <linux/config.h>
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/if.h>
  11 #include <linux/skbuff.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/workqueue.h>
  14 #include <linux/wireless.h>
  15 #include <net/iw_handler.h>
  16
  17 #include <linux/ioport.h>
  18 #include <linux/pci.h>
  19 #include <asm/io.h>
  20
  21 #include "hostap_wlan.h"
  22
  23
  24 static char *version = PRISM2_VERSION " (Jouni Malinen <jkmaline@cc.hut.fi>)";
  25 static char *dev_info = "hostap_pci";
  26
  27
  28 MODULE_AUTHOR("Jouni Malinen");
  29 MODULE_DESCRIPTION("Support for Intersil Prism2.5-based 802.11 wireless LAN "
  30                    "PCI cards.");
  31 MODULE_SUPPORTED_DEVICE("Intersil Prism2.5-based WLAN PCI cards");
  32 MODULE_LICENSE("GPL");
  33 MODULE_VERSION(PRISM2_VERSION);
  34
  35
  36 /* struct local_info::hw_priv */
  37 struct hostap_pci_priv {
  38         void __iomem *mem_start;
  39 };
  40
  41
  42 /* FIX: do we need mb/wmb/rmb with memory operations? */
  43
  44
  45 static struct pci_device_id prism2_pci_id_table[] __devinitdata = {
  46         /* Intersil Prism3 ISL3872 11Mb/s WLAN Controller */
  47         { 0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID },
  48         /* Intersil Prism2.5 ISL3874 11Mb/s WLAN Controller */
  49         { 0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID },
  50         /* Samsung MagicLAN SWL-2210P */
  51         { 0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID },
  52         { 0 }
  53 };
  54
  55
  56 #ifdef PRISM2_IO_DEBUG
  57
  58 static inline void hfa384x_outb_debug(struct net_device *dev, int a, u8 v)
  59 {
  60         struct hostap_interface *iface;
  61         struct hostap_pci_priv *hw_priv;
  62         local_info_t *local;
  63         unsigned long flags;
  64
  65         iface = netdev_priv(dev);
  66         local = iface->local;
  67         hw_priv = local->hw_priv;
  68
  69         spin_lock_irqsave(&local->lock, flags);
  70         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTB, a, v);
  71         writeb(v, hw_priv->mem_start + a);
  72         spin_unlock_irqrestore(&local->lock, flags);
  73 }
  74
  75 static inline u8 hfa384x_inb_debug(struct net_device *dev, int a)
  76 {
  77         struct hostap_interface *iface;
  78         struct hostap_pci_priv *hw_priv;
  79         local_info_t *local;
  80         unsigned long flags;
  81         u8 v;
  82
  83         iface = netdev_priv(dev);
  84         local = iface->local;
  85         hw_priv = local->hw_priv;
  86
  87         spin_lock_irqsave(&local->lock, flags);
  88         v = readb(hw_priv->mem_start + a);
  89         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INB, a, v);
  90         spin_unlock_irqrestore(&local->lock, flags);
  91         return v;
  92 }
  93
  94 static inline void hfa384x_outw_debug(struct net_device *dev, int a, u16 v)
  95 {
  96         struct hostap_interface *iface;
  97         struct hostap_pci_priv *hw_priv;
  98         local_info_t *local;
  99         unsigned long flags;
 100
 101         iface = netdev_priv(dev);
 102         local = iface->local;
 103         hw_priv = local->hw_priv;
 104
 105         spin_lock_irqsave(&local->lock, flags);
 106         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTW, a, v);
 107         writew(v, hw_priv->mem_start + a);
 108         spin_unlock_irqrestore(&local->lock, flags);
 109 }
 110
 111 static inline u16 hfa384x_inw_debug(struct net_device *dev, int a)
 112 {
 113         struct hostap_interface *iface;
 114         struct hostap_pci_priv *hw_priv;
 115         local_info_t *local;
 116         unsigned long flags;
 117         u16 v;
 118
 119         iface = netdev_priv(dev);
 120         local = iface->local;
 121         hw_priv = local->hw_priv;
 122
 123         spin_lock_irqsave(&local->lock, flags);
 124         v = readw(hw_priv->mem_start + a);
 125         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INW, a, v);
 126         spin_unlock_irqrestore(&local->lock, flags);
 127         return v;
 128 }
 129
 130 #define HFA384X_OUTB(v,a) hfa384x_outb_debug(dev, (a), (v))
 131 #define HFA384X_INB(a) hfa384x_inb_debug(dev, (a))
 132 #define HFA384X_OUTW(v,a) hfa384x_outw_debug(dev, (a), (v))
 133 #define HFA384X_INW(a) hfa384x_inw_debug(dev, (a))
 134 #define HFA384X_OUTW_DATA(v,a) hfa384x_outw_debug(dev, (a), cpu_to_le16((v)))
 135 #define HFA384X_INW_DATA(a) (u16) le16_to_cpu(hfa384x_inw_debug(dev, (a)))
 136
 137 #else /* PRISM2_IO_DEBUG */
 138
 139 static inline void hfa384x_outb(struct net_device *dev, int a, u8 v)
 140 {
 141         struct hostap_interface *iface;
 142         struct hostap_pci_priv *hw_priv;
 143         iface = netdev_priv(dev);
 144         hw_priv = iface->local->hw_priv;
 145         writeb(v, hw_priv->mem_start + a);
 146 }
 147
 148 static inline u8 hfa384x_inb(struct net_device *dev, int a)
 149 {
 150         struct hostap_interface *iface;
 151         struct hostap_pci_priv *hw_priv;
 152         iface = netdev_priv(dev);
 153         hw_priv = iface->local->hw_priv;
 154         return readb(hw_priv->mem_start + a);
 155 }
 156
 157 static inline void hfa384x_outw(struct net_device *dev, int a, u16 v)
 158 {
 159         struct hostap_interface *iface;
 160         struct hostap_pci_priv *hw_priv;
 161         iface = netdev_priv(dev);
 162         hw_priv = iface->local->hw_priv;
 163         writew(v, hw_priv->mem_start + a);
 164 }
 165
 166 static inline u16 hfa384x_inw(struct net_device *dev, int a)
 167 {
 168         struct hostap_interface *iface;
 169         struct hostap_pci_priv *hw_priv;
 170         iface = netdev_priv(dev);
 171         hw_priv = iface->local->hw_priv;
 172         return readw(hw_priv->mem_start + a);
 173 }
 174
 175 #define HFA384X_OUTB(v,a) hfa384x_outb(dev, (a), (v))
 176 #define HFA384X_INB(a) hfa384x_inb(dev, (a))
 177 #define HFA384X_OUTW(v,a) hfa384x_outw(dev, (a), (v))
 178 #define HFA384X_INW(a) hfa384x_inw(dev, (a))
 179 #define HFA384X_OUTW_DATA(v,a) hfa384x_outw(dev, (a), cpu_to_le16((v)))
 180 #define HFA384X_INW_DATA(a) (u16) le16_to_cpu(hfa384x_inw(dev, (a)))
 181
 182 #endif /* PRISM2_IO_DEBUG */
 183
 184
 185 static int hfa384x_from_bap(struct net_device *dev, u16 bap, void *buf,
 186                             int len)
 187 {
 188         u16 d_off;
 189         u16 *pos;
 190
 191         d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
 192         pos = (u16 *) buf;
 193
 194         for ( ; len > 1; len -= 2)
 195                 *pos++ = HFA384X_INW_DATA(d_off);
 196
 197         if (len & 1)
 198                 *((char *) pos) = HFA384X_INB(d_off);
 199
 200         return 0;
 201 }
 202
 203
 204 static int hfa384x_to_bap(struct net_device *dev, u16 bap, void *buf, int len)
 205 {
 206         u16 d_off;
 207         u16 *pos;
 208
 209         d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
 210         pos = (u16 *) buf;
 211
 212         for ( ; len > 1; len -= 2)
 213                 HFA384X_OUTW_DATA(*pos++, d_off);
 214
 215         if (len & 1)
 216                 HFA384X_OUTB(*((char *) pos), d_off);
 217
 218         return 0;
 219 }
 220
 221
 222 /* FIX: This might change at some point.. */
 223 #include "hostap_hw.c"
 224
 225 static void prism2_pci_cor_sreset(local_info_t *local)
 226 {
 227         struct net_device *dev = local->dev;
 228         u16 reg;
 229
 230         reg = HFA384X_INB(HFA384X_PCICOR_OFF);
 231         printk(KERN_DEBUG "%s: Original COR value: 0x%0x\n", dev->name, reg);
 232
 233         /* linux-wlan-ng uses extremely long hold and settle times for
 234          * COR sreset. A comment in the driver code mentions that the long
 235          * delays appear to be necessary. However, at least IBM 22P6901 seems
 236          * to work fine with shorter delays.
 237          *
 238          * Longer delays can be configured by uncommenting following line: */
 239 /* #define PRISM2_PCI_USE_LONG_DELAYS */
 240
 241 #ifdef PRISM2_PCI_USE_LONG_DELAYS
 242         int i;
 243
 244         HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
 245         mdelay(250);
 246
 247         HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
 248         mdelay(500);
 249
 250         /* Wait for f/w to complete initialization (CMD:BUSY == 0) */
 251         i = 2000000 / 10;
 252         while ((HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) && --i)
 253                 udelay(10);
 254
 255 #else /* PRISM2_PCI_USE_LONG_DELAYS */
 256
 257         HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
 258         mdelay(2);
 259         HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
 260         mdelay(2);
 261
 262 #endif /* PRISM2_PCI_USE_LONG_DELAYS */
 263
 264         if (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) {
 265                 printk(KERN_DEBUG "%s: COR sreset timeout\n", dev->name);
 266         }
 267 }
 268
 269
 270 static void prism2_pci_genesis_reset(local_info_t *local, int hcr)
 271 {
 272         struct net_device *dev = local->dev;
 273
 274         HFA384X_OUTW(0x00C5, HFA384X_PCICOR_OFF);
 275         mdelay(10);
 276         HFA384X_OUTW(hcr, HFA384X_PCIHCR_OFF);
 277         mdelay(10);
 278         HFA384X_OUTW(0x0045, HFA384X_PCICOR_OFF);
 279         mdelay(10);
 280 }
 281
 282
 283 static struct prism2_helper_functions prism2_pci_funcs =
 284 {
 285         .card_present   = NULL,
 286         .cor_sreset     = prism2_pci_cor_sreset,
 287         .genesis_reset  = prism2_pci_genesis_reset,
 288         .hw_type        = HOSTAP_HW_PCI,
 289 };
 290
 291
 292 static int prism2_pci_probe(struct pci_dev *pdev,
 293                             const struct pci_device_id *id)
 294 {
 295         unsigned long phymem;
 296         void __iomem *mem = NULL;
 297         local_info_t *local = NULL;
 298         struct net_device *dev = NULL;
 299         static int cards_found /* = 0 */;
 300         int irq_registered = 0;
 301         struct hostap_interface *iface;
 302         struct hostap_pci_priv *hw_priv;
 303
 304         hw_priv = kmalloc(sizeof(*hw_priv), GFP_KERNEL);
 305         if (hw_priv == NULL)
 306                 return -ENOMEM;
 307         memset(hw_priv, 0, sizeof(*hw_priv));
 308
 309         if (pci_enable_device(pdev))
 310                 return -EIO;
 311
 312         phymem = pci_resource_start(pdev, 0);
 313
 314         if (!request_mem_region(phymem, pci_resource_len(pdev, 0), "Prism2")) {
 315                 printk(KERN_ERR "prism2: Cannot reserve PCI memory region\n");
 316                 goto err_out_disable;
 317         }
 318
 319         mem = ioremap(phymem, pci_resource_len(pdev, 0));
 320         if (mem == NULL) {
 321                 printk(KERN_ERR "prism2: Cannot remap PCI memory region\n") ;
 322                 goto fail;
 323         }
 324
 325         dev = prism2_init_local_data(&prism2_pci_funcs, cards_found,
 326                                      &pdev->dev);
 327         if (dev == NULL)
 328                 goto fail;
 329         iface = netdev_priv(dev);
 330         local = iface->local;
 331         local->hw_priv = hw_priv;
 332         cards_found++;
 333
 334         dev->irq = pdev->irq;
 335         hw_priv->mem_start = mem;
 336
 337         prism2_pci_cor_sreset(local);
 338
 339         pci_set_drvdata(pdev, dev);
 340
 341         if (request_irq(dev->irq, prism2_interrupt, SA_SHIRQ, dev->name,
 342                         dev)) {
 343                 printk(KERN_WARNING "%s: request_irq failed\n", dev->name);
 344                 goto fail;
 345         } else
 346                 irq_registered = 1;
 347
 348         if (!local->pri_only && prism2_hw_config(dev, 1)) {
 349                 printk(KERN_DEBUG "%s: hardware initialization failed\n",
 350                        dev_info);
 351                 goto fail;
 352         }
 353
 354         printk(KERN_INFO "%s: Intersil Prism2.5 PCI: "
 355                "mem=0x%lx, irq=%d\n", dev->name, phymem, dev->irq);
 356
 357         return hostap_hw_ready(dev);
 358
 359  fail:
 360         if (irq_registered && dev)
 361                 free_irq(dev->irq, dev);
 362
 363         if (mem)
 364                 iounmap(mem);
 365
 366         release_mem_region(phymem, pci_resource_len(pdev, 0));
 367
 368  err_out_disable:
 369         pci_disable_device(pdev);
 370         prism2_free_local_data(dev);
 371         kfree(hw_priv);
 372
 373         return -ENODEV;
 374 }
 375
 376
 377 static void prism2_pci_remove(struct pci_dev *pdev)
 378 {
 379         struct net_device *dev;
 380         struct hostap_interface *iface;
 381         void __iomem *mem_start;
 382         struct hostap_pci_priv *hw_priv;
 383
 384         dev = pci_get_drvdata(pdev);
 385         iface = netdev_priv(dev);
 386         hw_priv = iface->local->hw_priv;
 387
 388         /* Reset the hardware, and ensure interrupts are disabled. */
 389         prism2_pci_cor_sreset(iface->local);
 390         hfa384x_disable_interrupts(dev);
 391
 392         if (dev->irq)
 393                 free_irq(dev->irq, dev);
 394
 395         mem_start = hw_priv->mem_start;
 396         prism2_free_local_data(dev);
 397         kfree(hw_priv);
 398
 399         iounmap(mem_start);
 400
 401         release_mem_region(pci_resource_start(pdev, 0),
 402                            pci_resource_len(pdev, 0));
 403         pci_disable_device(pdev);
 404 }
 405
 406
 407 #ifdef CONFIG_PM
 408 static int prism2_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 409 {
 410         struct net_device *dev = pci_get_drvdata(pdev);
 411
 412         if (netif_running(dev)) {
 413                 netif_stop_queue(dev);
 414                 netif_device_detach(dev);
 415         }
 416         prism2_suspend(dev);
 417         pci_save_state(pdev);
 418         pci_disable_device(pdev);
 419         pci_set_power_state(pdev, PCI_D3hot);
 420
 421         return 0;
 422 }
 423
 424 static int prism2_pci_resume(struct pci_dev *pdev)
 425 {
 426         struct net_device *dev = pci_get_drvdata(pdev);
 427
 428         pci_enable_device(pdev);
 429         pci_restore_state(pdev);
 430         prism2_hw_config(dev, 0);
 431         if (netif_running(dev)) {
 432                 netif_device_attach(dev);
 433                 netif_start_queue(dev);
 434         }
 435
 436         return 0;
 437 }
 438 #endif /* CONFIG_PM */
 439
 440
 441 MODULE_DEVICE_TABLE(pci, prism2_pci_id_table);
 442
 443 static struct pci_driver prism2_pci_drv_id = {
 444         .name           = "hostap_pci",
 445         .id_table       = prism2_pci_id_table,
 446         .probe          = prism2_pci_probe,
 447         .remove         = prism2_pci_remove,
 448 #ifdef CONFIG_PM
 449         .suspend        = prism2_pci_suspend,
 450         .resume         = prism2_pci_resume,
 451 #endif /* CONFIG_PM */
 452         /* Linux 2.4.6 added save_state and enable_wake that are not used here
 453          */
 454 };
 455
 456
 457 static int __init init_prism2_pci(void)
 458 {
 459         printk(KERN_INFO "%s: %s\n", dev_info, version);
 460
 461         return pci_register_driver(&prism2_pci_drv_id);
 462 }
 463
 464
 465 static void __exit exit_prism2_pci(void)
 466 {
 467         pci_unregister_driver(&prism2_pci_drv_id);
 468         printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
 469 }
 470
 471
 472 module_init(init_prism2_pci);
 473 module_exit(exit_prism2_pci);