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/module.h>
   8 #include <linux/init.h>
   9 #include <linux/if.h>
  10 #include <linux/skbuff.h>
  11 #include <linux/netdevice.h>
  12 #include <linux/workqueue.h>
  13 #include <linux/wireless.h>
  14 #include <net/iw_handler.h>
  15
  16 #include <linux/ioport.h>
  17 #include <linux/pci.h>
  18 #include <asm/io.h>
  19
  20 #include "hostap_wlan.h"
  21
  22
  23 static char *version = PRISM2_VERSION " (Jouni Malinen <jkmaline@cc.hut.fi>)";
  24 static char *dev_info = "hostap_pci";
  25
  26
  27 MODULE_AUTHOR("Jouni Malinen");
  28 MODULE_DESCRIPTION("Support for Intersil Prism2.5-based 802.11 wireless LAN "
  29                    "PCI cards.");
  30 MODULE_SUPPORTED_DEVICE("Intersil Prism2.5-based WLAN PCI cards");
  31 MODULE_LICENSE("GPL");
  32 MODULE_VERSION(PRISM2_VERSION);
  33
  34
  35 /* struct local_info::hw_priv */
  36 struct hostap_pci_priv {
  37         void __iomem *mem_start;
  38 };
  39
  40
  41 /* FIX: do we need mb/wmb/rmb with memory operations? */
  42
  43
  44 static struct pci_device_id prism2_pci_id_table[] __devinitdata = {
  45         /* Intersil Prism3 ISL3872 11Mb/s WLAN Controller */
  46         { 0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID },
  47         /* Intersil Prism2.5 ISL3874 11Mb/s WLAN Controller */
  48         { 0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID },
  49         /* Samsung MagicLAN SWL-2210P */
  50         { 0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID },
  51         { 0 }
  52 };
  53
  54
  55 #ifdef PRISM2_IO_DEBUG
  56
  57 static inline void hfa384x_outb_debug(struct net_device *dev, int a, u8 v)
  58 {
  59         struct hostap_interface *iface;
  60         struct hostap_pci_priv *hw_priv;
  61         local_info_t *local;
  62         unsigned long flags;
  63
  64         iface = netdev_priv(dev);
  65         local = iface->local;
  66         hw_priv = local->hw_priv;
  67
  68         spin_lock_irqsave(&local->lock, flags);
  69         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTB, a, v);
  70         writeb(v, hw_priv->mem_start + a);
  71         spin_unlock_irqrestore(&local->lock, flags);
  72 }
  73
  74 static inline u8 hfa384x_inb_debug(struct net_device *dev, int a)
  75 {
  76         struct hostap_interface *iface;
  77         struct hostap_pci_priv *hw_priv;
  78         local_info_t *local;
  79         unsigned long flags;
  80         u8 v;
  81
  82         iface = netdev_priv(dev);
  83         local = iface->local;
  84         hw_priv = local->hw_priv;
  85
  86         spin_lock_irqsave(&local->lock, flags);
  87         v = readb(hw_priv->mem_start + a);
  88         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INB, a, v);
  89         spin_unlock_irqrestore(&local->lock, flags);
  90         return v;
  91 }
  92
  93 static inline void hfa384x_outw_debug(struct net_device *dev, int a, u16 v)
  94 {
  95         struct hostap_interface *iface;
  96         struct hostap_pci_priv *hw_priv;
  97         local_info_t *local;
  98         unsigned long flags;
  99
 100         iface = netdev_priv(dev);
 101         local = iface->local;
 102         hw_priv = local->hw_priv;
 103
 104         spin_lock_irqsave(&local->lock, flags);
 105         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTW, a, v);
 106         writew(v, hw_priv->mem_start + a);
 107         spin_unlock_irqrestore(&local->lock, flags);
 108 }
 109
 110 static inline u16 hfa384x_inw_debug(struct net_device *dev, int a)
 111 {
 112         struct hostap_interface *iface;
 113         struct hostap_pci_priv *hw_priv;
 114         local_info_t *local;
 115         unsigned long flags;
 116         u16 v;
 117
 118         iface = netdev_priv(dev);
 119         local = iface->local;
 120         hw_priv = local->hw_priv;
 121
 122         spin_lock_irqsave(&local->lock, flags);
 123         v = readw(hw_priv->mem_start + a);
 124         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INW, a, v);
 125         spin_unlock_irqrestore(&local->lock, flags);
 126         return v;
 127 }
 128
 129 #define HFA384X_OUTB(v,a) hfa384x_outb_debug(dev, (a), (v))
 130 #define HFA384X_INB(a) hfa384x_inb_debug(dev, (a))
 131 #define HFA384X_OUTW(v,a) hfa384x_outw_debug(dev, (a), (v))
 132 #define HFA384X_INW(a) hfa384x_inw_debug(dev, (a))
 133 #define HFA384X_OUTW_DATA(v,a) hfa384x_outw_debug(dev, (a), cpu_to_le16((v)))
 134 #define HFA384X_INW_DATA(a) (u16) le16_to_cpu(hfa384x_inw_debug(dev, (a)))
 135
 136 #else /* PRISM2_IO_DEBUG */
 137
 138 static inline void hfa384x_outb(struct net_device *dev, int a, u8 v)
 139 {
 140         struct hostap_interface *iface;
 141         struct hostap_pci_priv *hw_priv;
 142         iface = netdev_priv(dev);
 143         hw_priv = iface->local->hw_priv;
 144         writeb(v, hw_priv->mem_start + a);
 145 }
 146
 147 static inline u8 hfa384x_inb(struct net_device *dev, int a)
 148 {
 149         struct hostap_interface *iface;
 150         struct hostap_pci_priv *hw_priv;
 151         iface = netdev_priv(dev);
 152         hw_priv = iface->local->hw_priv;
 153         return readb(hw_priv->mem_start + a);
 154 }
 155
 156 static inline void hfa384x_outw(struct net_device *dev, int a, u16 v)
 157 {
 158         struct hostap_interface *iface;
 159         struct hostap_pci_priv *hw_priv;
 160         iface = netdev_priv(dev);
 161         hw_priv = iface->local->hw_priv;
 162         writew(v, hw_priv->mem_start + a);
 163 }
 164
 165 static inline u16 hfa384x_inw(struct net_device *dev, int a)
 166 {
 167         struct hostap_interface *iface;
 168         struct hostap_pci_priv *hw_priv;
 169         iface = netdev_priv(dev);
 170         hw_priv = iface->local->hw_priv;
 171         return readw(hw_priv->mem_start + a);
 172 }
 173
 174 #define HFA384X_OUTB(v,a) hfa384x_outb(dev, (a), (v))
 175 #define HFA384X_INB(a) hfa384x_inb(dev, (a))
 176 #define HFA384X_OUTW(v,a) hfa384x_outw(dev, (a), (v))
 177 #define HFA384X_INW(a) hfa384x_inw(dev, (a))
 178 #define HFA384X_OUTW_DATA(v,a) hfa384x_outw(dev, (a), cpu_to_le16((v)))
 179 #define HFA384X_INW_DATA(a) (u16) le16_to_cpu(hfa384x_inw(dev, (a)))
 180
 181 #endif /* PRISM2_IO_DEBUG */
 182
 183
 184 static int hfa384x_from_bap(struct net_device *dev, u16 bap, void *buf,
 185                             int len)
 186 {
 187         u16 d_off;
 188         u16 *pos;
 189
 190         d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
 191         pos = (u16 *) buf;
 192
 193         for ( ; len > 1; len -= 2)
 194                 *pos++ = HFA384X_INW_DATA(d_off);
 195
 196         if (len & 1)
 197                 *((char *) pos) = HFA384X_INB(d_off);
 198
 199         return 0;
 200 }
 201
 202
 203 static int hfa384x_to_bap(struct net_device *dev, u16 bap, void *buf, int len)
 204 {
 205         u16 d_off;
 206         u16 *pos;
 207
 208         d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
 209         pos = (u16 *) buf;
 210
 211         for ( ; len > 1; len -= 2)
 212                 HFA384X_OUTW_DATA(*pos++, d_off);
 213
 214         if (len & 1)
 215                 HFA384X_OUTB(*((char *) pos), d_off);
 216
 217         return 0;
 218 }
 219
 220
 221 /* FIX: This might change at some point.. */
 222 #include "hostap_hw.c"
 223
 224 static void prism2_pci_cor_sreset(local_info_t *local)
 225 {
 226         struct net_device *dev = local->dev;
 227         u16 reg;
 228
 229         reg = HFA384X_INB(HFA384X_PCICOR_OFF);
 230         printk(KERN_DEBUG "%s: Original COR value: 0x%0x\n", dev->name, reg);
 231
 232         /* linux-wlan-ng uses extremely long hold and settle times for
 233          * COR sreset. A comment in the driver code mentions that the long
 234          * delays appear to be necessary. However, at least IBM 22P6901 seems
 235          * to work fine with shorter delays.
 236          *
 237          * Longer delays can be configured by uncommenting following line: */
 238 /* #define PRISM2_PCI_USE_LONG_DELAYS */
 239
 240 #ifdef PRISM2_PCI_USE_LONG_DELAYS
 241         int i;
 242
 243         HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
 244         mdelay(250);
 245
 246         HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
 247         mdelay(500);
 248
 249         /* Wait for f/w to complete initialization (CMD:BUSY == 0) */
 250         i = 2000000 / 10;
 251         while ((HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) && --i)
 252                 udelay(10);
 253
 254 #else /* PRISM2_PCI_USE_LONG_DELAYS */
 255
 256         HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
 257         mdelay(2);
 258         HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
 259         mdelay(2);
 260
 261 #endif /* PRISM2_PCI_USE_LONG_DELAYS */
 262
 263         if (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) {
 264                 printk(KERN_DEBUG "%s: COR sreset timeout\n", dev->name);
 265         }
 266 }
 267
 268
 269 static void prism2_pci_genesis_reset(local_info_t *local, int hcr)
 270 {
 271         struct net_device *dev = local->dev;
 272
 273         HFA384X_OUTW(0x00C5, HFA384X_PCICOR_OFF);
 274         mdelay(10);
 275         HFA384X_OUTW(hcr, HFA384X_PCIHCR_OFF);
 276         mdelay(10);
 277         HFA384X_OUTW(0x0045, HFA384X_PCICOR_OFF);
 278         mdelay(10);
 279 }
 280
 281
 282 static struct prism2_helper_functions prism2_pci_funcs =
 283 {
 284         .card_present   = NULL,
 285         .cor_sreset     = prism2_pci_cor_sreset,
 286         .genesis_reset  = prism2_pci_genesis_reset,
 287         .hw_type        = HOSTAP_HW_PCI,
 288 };
 289
 290
 291 static int prism2_pci_probe(struct pci_dev *pdev,
 292                             const struct pci_device_id *id)
 293 {
 294         unsigned long phymem;
 295         void __iomem *mem = NULL;
 296         local_info_t *local = NULL;
 297         struct net_device *dev = NULL;
 298         static int cards_found /* = 0 */;
 299         int irq_registered = 0;
 300         struct hostap_interface *iface;
 301         struct hostap_pci_priv *hw_priv;
 302
 303         hw_priv = kzalloc(sizeof(*hw_priv), GFP_KERNEL);
 304         if (hw_priv == NULL)
 305                 return -ENOMEM;
 306
 307         if (pci_enable_device(pdev))
 308                 goto err_out_free;
 309
 310         phymem = pci_resource_start(pdev, 0);
 311
 312         if (!request_mem_region(phymem, pci_resource_len(pdev, 0), "Prism2")) {
 313                 printk(KERN_ERR "prism2: Cannot reserve PCI memory region\n");
 314                 goto err_out_disable;
 315         }
 316
 317         mem = ioremap(phymem, pci_resource_len(pdev, 0));
 318         if (mem == NULL) {
 319                 printk(KERN_ERR "prism2: Cannot remap PCI memory region\n") ;
 320                 goto fail;
 321         }
 322
 323         dev = prism2_init_local_data(&prism2_pci_funcs, cards_found,
 324                                      &pdev->dev);
 325         if (dev == NULL)
 326                 goto fail;
 327         iface = netdev_priv(dev);
 328         local = iface->local;
 329         local->hw_priv = hw_priv;
 330         cards_found++;
 331
 332         dev->irq = pdev->irq;
 333         hw_priv->mem_start = mem;
 334
 335         prism2_pci_cor_sreset(local);
 336
 337         pci_set_drvdata(pdev, dev);
 338
 339         if (request_irq(dev->irq, prism2_interrupt, IRQF_SHARED, dev->name,
 340                         dev)) {
 341                 printk(KERN_WARNING "%s: request_irq failed\n", dev->name);
 342                 goto fail;
 343         } else
 344                 irq_registered = 1;
 345
 346         if (!local->pri_only && prism2_hw_config(dev, 1)) {
 347                 printk(KERN_DEBUG "%s: hardware initialization failed\n",
 348                        dev_info);
 349                 goto fail;
 350         }
 351
 352         printk(KERN_INFO "%s: Intersil Prism2.5 PCI: "
 353                "mem=0x%lx, irq=%d\n", dev->name, phymem, dev->irq);
 354
 355         return hostap_hw_ready(dev);
 356
 357  fail:
 358         if (irq_registered && dev)
 359                 free_irq(dev->irq, dev);
 360
 361         if (mem)
 362                 iounmap(mem);
 363
 364         release_mem_region(phymem, pci_resource_len(pdev, 0));
 365
 366  err_out_disable:
 367         pci_disable_device(pdev);
 368         prism2_free_local_data(dev);
 369
 370  err_out_free:
 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         int err;
 428
 429         err = pci_enable_device(pdev);
 430         if (err) {
 431                 printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
 432                        dev->name);
 433                 return err;
 434         }
 435         pci_restore_state(pdev);
 436         prism2_hw_config(dev, 0);
 437         if (netif_running(dev)) {
 438                 netif_device_attach(dev);
 439                 netif_start_queue(dev);
 440         }
 441
 442         return 0;
 443 }
 444 #endif /* CONFIG_PM */
 445
 446
 447 MODULE_DEVICE_TABLE(pci, prism2_pci_id_table);
 448
 449 static struct pci_driver prism2_pci_drv_id = {
 450         .name           = "hostap_pci",
 451         .id_table       = prism2_pci_id_table,
 452         .probe          = prism2_pci_probe,
 453         .remove         = prism2_pci_remove,
 454 #ifdef CONFIG_PM
 455         .suspend        = prism2_pci_suspend,
 456         .resume         = prism2_pci_resume,
 457 #endif /* CONFIG_PM */
 458         /* Linux 2.4.6 added save_state and enable_wake that are not used here
 459          */
 460 };
 461
 462
 463 static int __init init_prism2_pci(void)
 464 {
 465         printk(KERN_INFO "%s: %s\n", dev_info, version);
 466
 467         return pci_register_driver(&prism2_pci_drv_id);
 468 }
 469
 470
 471 static void __exit exit_prism2_pci(void)
 472 {
 473         pci_unregister_driver(&prism2_pci_drv_id);
 474         printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
 475 }
 476
 477
 478 module_init(init_prism2_pci);
 479 module_exit(exit_prism2_pci);