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/if.h>
   9 #include <linux/skbuff.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/slab.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 *dev_info = "hostap_pci";
  24
  25
  26 MODULE_AUTHOR("Jouni Malinen");
  27 MODULE_DESCRIPTION("Support for Intersil Prism2.5-based 802.11 wireless LAN "
  28                    "PCI cards.");
  29 MODULE_SUPPORTED_DEVICE("Intersil Prism2.5-based WLAN PCI cards");
  30 MODULE_LICENSE("GPL");
  31
  32
  33 /* struct local_info::hw_priv */
  34 struct hostap_pci_priv {
  35         void __iomem *mem_start;
  36 };
  37
  38
  39 /* FIX: do we need mb/wmb/rmb with memory operations? */
  40
  41
  42 static DEFINE_PCI_DEVICE_TABLE(prism2_pci_id_table) = {
  43         /* Intersil Prism3 ISL3872 11Mb/s WLAN Controller */
  44         { 0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID },
  45         /* Intersil Prism2.5 ISL3874 11Mb/s WLAN Controller */
  46         { 0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID },
  47         /* Samsung MagicLAN SWL-2210P */
  48         { 0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID },
  49         { 0 }
  50 };
  51
  52
  53 #ifdef PRISM2_IO_DEBUG
  54
  55 static inline void hfa384x_outb_debug(struct net_device *dev, int a, u8 v)
  56 {
  57         struct hostap_interface *iface;
  58         struct hostap_pci_priv *hw_priv;
  59         local_info_t *local;
  60         unsigned long flags;
  61
  62         iface = netdev_priv(dev);
  63         local = iface->local;
  64         hw_priv = local->hw_priv;
  65
  66         spin_lock_irqsave(&local->lock, flags);
  67         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTB, a, v);
  68         writeb(v, hw_priv->mem_start + a);
  69         spin_unlock_irqrestore(&local->lock, flags);
  70 }
  71
  72 static inline u8 hfa384x_inb_debug(struct net_device *dev, int a)
  73 {
  74         struct hostap_interface *iface;
  75         struct hostap_pci_priv *hw_priv;
  76         local_info_t *local;
  77         unsigned long flags;
  78         u8 v;
  79
  80         iface = netdev_priv(dev);
  81         local = iface->local;
  82         hw_priv = local->hw_priv;
  83
  84         spin_lock_irqsave(&local->lock, flags);
  85         v = readb(hw_priv->mem_start + a);
  86         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INB, a, v);
  87         spin_unlock_irqrestore(&local->lock, flags);
  88         return v;
  89 }
  90
  91 static inline void hfa384x_outw_debug(struct net_device *dev, int a, u16 v)
  92 {
  93         struct hostap_interface *iface;
  94         struct hostap_pci_priv *hw_priv;
  95         local_info_t *local;
  96         unsigned long flags;
  97
  98         iface = netdev_priv(dev);
  99         local = iface->local;
 100         hw_priv = local->hw_priv;
 101
 102         spin_lock_irqsave(&local->lock, flags);
 103         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTW, a, v);
 104         writew(v, hw_priv->mem_start + a);
 105         spin_unlock_irqrestore(&local->lock, flags);
 106 }
 107
 108 static inline u16 hfa384x_inw_debug(struct net_device *dev, int a)
 109 {
 110         struct hostap_interface *iface;
 111         struct hostap_pci_priv *hw_priv;
 112         local_info_t *local;
 113         unsigned long flags;
 114         u16 v;
 115
 116         iface = netdev_priv(dev);
 117         local = iface->local;
 118         hw_priv = local->hw_priv;
 119
 120         spin_lock_irqsave(&local->lock, flags);
 121         v = readw(hw_priv->mem_start + a);
 122         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INW, a, v);
 123         spin_unlock_irqrestore(&local->lock, flags);
 124         return v;
 125 }
 126
 127 #define HFA384X_OUTB(v,a) hfa384x_outb_debug(dev, (a), (v))
 128 #define HFA384X_INB(a) hfa384x_inb_debug(dev, (a))
 129 #define HFA384X_OUTW(v,a) hfa384x_outw_debug(dev, (a), (v))
 130 #define HFA384X_INW(a) hfa384x_inw_debug(dev, (a))
 131 #define HFA384X_OUTW_DATA(v,a) hfa384x_outw_debug(dev, (a), le16_to_cpu((v)))
 132 #define HFA384X_INW_DATA(a) cpu_to_le16(hfa384x_inw_debug(dev, (a)))
 133
 134 #else /* PRISM2_IO_DEBUG */
 135
 136 static inline void hfa384x_outb(struct net_device *dev, int a, u8 v)
 137 {
 138         struct hostap_interface *iface;
 139         struct hostap_pci_priv *hw_priv;
 140         iface = netdev_priv(dev);
 141         hw_priv = iface->local->hw_priv;
 142         writeb(v, hw_priv->mem_start + a);
 143 }
 144
 145 static inline u8 hfa384x_inb(struct net_device *dev, int a)
 146 {
 147         struct hostap_interface *iface;
 148         struct hostap_pci_priv *hw_priv;
 149         iface = netdev_priv(dev);
 150         hw_priv = iface->local->hw_priv;
 151         return readb(hw_priv->mem_start + a);
 152 }
 153
 154 static inline void hfa384x_outw(struct net_device *dev, int a, u16 v)
 155 {
 156         struct hostap_interface *iface;
 157         struct hostap_pci_priv *hw_priv;
 158         iface = netdev_priv(dev);
 159         hw_priv = iface->local->hw_priv;
 160         writew(v, hw_priv->mem_start + a);
 161 }
 162
 163 static inline u16 hfa384x_inw(struct net_device *dev, int a)
 164 {
 165         struct hostap_interface *iface;
 166         struct hostap_pci_priv *hw_priv;
 167         iface = netdev_priv(dev);
 168         hw_priv = iface->local->hw_priv;
 169         return readw(hw_priv->mem_start + a);
 170 }
 171
 172 #define HFA384X_OUTB(v,a) hfa384x_outb(dev, (a), (v))
 173 #define HFA384X_INB(a) hfa384x_inb(dev, (a))
 174 #define HFA384X_OUTW(v,a) hfa384x_outw(dev, (a), (v))
 175 #define HFA384X_INW(a) hfa384x_inw(dev, (a))
 176 #define HFA384X_OUTW_DATA(v,a) hfa384x_outw(dev, (a), le16_to_cpu((v)))
 177 #define HFA384X_INW_DATA(a) cpu_to_le16(hfa384x_inw(dev, (a)))
 178
 179 #endif /* PRISM2_IO_DEBUG */
 180
 181
 182 static int hfa384x_from_bap(struct net_device *dev, u16 bap, void *buf,
 183                             int len)
 184 {
 185         u16 d_off;
 186         __le16 *pos;
 187
 188         d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
 189         pos = (__le16 *) buf;
 190
 191         for ( ; len > 1; len -= 2)
 192                 *pos++ = HFA384X_INW_DATA(d_off);
 193
 194         if (len & 1)
 195                 *((char *) pos) = HFA384X_INB(d_off);
 196
 197         return 0;
 198 }
 199
 200
 201 static int hfa384x_to_bap(struct net_device *dev, u16 bap, void *buf, int len)
 202 {
 203         u16 d_off;
 204         __le16 *pos;
 205
 206         d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
 207         pos = (__le16 *) buf;
 208
 209         for ( ; len > 1; len -= 2)
 210                 HFA384X_OUTW_DATA(*pos++, d_off);
 211
 212         if (len & 1)
 213                 HFA384X_OUTB(*((char *) pos), d_off);
 214
 215         return 0;
 216 }
 217
 218
 219 /* FIX: This might change at some point.. */
 220 #include "hostap_hw.c"
 221
 222 static void prism2_pci_cor_sreset(local_info_t *local)
 223 {
 224         struct net_device *dev = local->dev;
 225         u16 reg;
 226
 227         reg = HFA384X_INB(HFA384X_PCICOR_OFF);
 228         printk(KERN_DEBUG "%s: Original COR value: 0x%0x\n", dev->name, reg);
 229
 230         /* linux-wlan-ng uses extremely long hold and settle times for
 231          * COR sreset. A comment in the driver code mentions that the long
 232          * delays appear to be necessary. However, at least IBM 22P6901 seems
 233          * to work fine with shorter delays.
 234          *
 235          * Longer delays can be configured by uncommenting following line: */
 236 /* #define PRISM2_PCI_USE_LONG_DELAYS */
 237
 238 #ifdef PRISM2_PCI_USE_LONG_DELAYS
 239         int i;
 240
 241         HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
 242         mdelay(250);
 243
 244         HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
 245         mdelay(500);
 246
 247         /* Wait for f/w to complete initialization (CMD:BUSY == 0) */
 248         i = 2000000 / 10;
 249         while ((HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) && --i)
 250                 udelay(10);
 251
 252 #else /* PRISM2_PCI_USE_LONG_DELAYS */
 253
 254         HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
 255         mdelay(2);
 256         HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
 257         mdelay(2);
 258
 259 #endif /* PRISM2_PCI_USE_LONG_DELAYS */
 260
 261         if (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) {
 262                 printk(KERN_DEBUG "%s: COR sreset timeout\n", dev->name);
 263         }
 264 }
 265
 266
 267 static void prism2_pci_genesis_reset(local_info_t *local, int hcr)
 268 {
 269         struct net_device *dev = local->dev;
 270
 271         HFA384X_OUTW(0x00C5, HFA384X_PCICOR_OFF);
 272         mdelay(10);
 273         HFA384X_OUTW(hcr, HFA384X_PCIHCR_OFF);
 274         mdelay(10);
 275         HFA384X_OUTW(0x0045, HFA384X_PCICOR_OFF);
 276         mdelay(10);
 277 }
 278
 279
 280 static struct prism2_helper_functions prism2_pci_funcs =
 281 {
 282         .card_present   = NULL,
 283         .cor_sreset     = prism2_pci_cor_sreset,
 284         .genesis_reset  = prism2_pci_genesis_reset,
 285         .hw_type        = HOSTAP_HW_PCI,
 286 };
 287
 288
 289 static int prism2_pci_probe(struct pci_dev *pdev,
 290                             const struct pci_device_id *id)
 291 {
 292         unsigned long phymem;
 293         void __iomem *mem = NULL;
 294         local_info_t *local = NULL;
 295         struct net_device *dev = NULL;
 296         static int cards_found /* = 0 */;
 297         int irq_registered = 0;
 298         struct hostap_interface *iface;
 299         struct hostap_pci_priv *hw_priv;
 300
 301         hw_priv = kzalloc(sizeof(*hw_priv), GFP_KERNEL);
 302         if (hw_priv == NULL)
 303                 return -ENOMEM;
 304
 305         if (pci_enable_device(pdev))
 306                 goto err_out_free;
 307
 308         phymem = pci_resource_start(pdev, 0);
 309
 310         if (!request_mem_region(phymem, pci_resource_len(pdev, 0), "Prism2")) {
 311                 printk(KERN_ERR "prism2: Cannot reserve PCI memory region\n");
 312                 goto err_out_disable;
 313         }
 314
 315         mem = pci_ioremap_bar(pdev, 0);
 316         if (mem == NULL) {
 317                 printk(KERN_ERR "prism2: Cannot remap PCI memory region\n") ;
 318                 goto fail;
 319         }
 320
 321         dev = prism2_init_local_data(&prism2_pci_funcs, cards_found,
 322                                      &pdev->dev);
 323         if (dev == NULL)
 324                 goto fail;
 325         iface = netdev_priv(dev);
 326         local = iface->local;
 327         local->hw_priv = hw_priv;
 328         cards_found++;
 329
 330         dev->irq = pdev->irq;
 331         hw_priv->mem_start = mem;
 332         dev->base_addr = (unsigned long) mem;
 333
 334         prism2_pci_cor_sreset(local);
 335
 336         pci_set_drvdata(pdev, dev);
 337
 338         if (request_irq(dev->irq, prism2_interrupt, IRQF_SHARED, dev->name,
 339                         dev)) {
 340                 printk(KERN_WARNING "%s: request_irq failed\n", dev->name);
 341                 goto fail;
 342         } else
 343                 irq_registered = 1;
 344
 345         if (!local->pri_only && prism2_hw_config(dev, 1)) {
 346                 printk(KERN_DEBUG "%s: hardware initialization failed\n",
 347                        dev_info);
 348                 goto fail;
 349         }
 350
 351         printk(KERN_INFO "%s: Intersil Prism2.5 PCI: "
 352                "mem=0x%lx, irq=%d\n", dev->name, phymem, dev->irq);
 353
 354         return hostap_hw_ready(dev);
 355
 356  fail:
 357         if (irq_registered && dev)
 358                 free_irq(dev->irq, dev);
 359
 360         if (mem)
 361                 iounmap(mem);
 362
 363         release_mem_region(phymem, pci_resource_len(pdev, 0));
 364
 365  err_out_disable:
 366         pci_disable_device(pdev);
 367         prism2_free_local_data(dev);
 368
 369  err_out_free:
 370         kfree(hw_priv);
 371
 372         return -ENODEV;
 373 }
 374
 375
 376 static void prism2_pci_remove(struct pci_dev *pdev)
 377 {
 378         struct net_device *dev;
 379         struct hostap_interface *iface;
 380         void __iomem *mem_start;
 381         struct hostap_pci_priv *hw_priv;
 382
 383         dev = pci_get_drvdata(pdev);
 384         iface = netdev_priv(dev);
 385         hw_priv = iface->local->hw_priv;
 386
 387         /* Reset the hardware, and ensure interrupts are disabled. */
 388         prism2_pci_cor_sreset(iface->local);
 389         hfa384x_disable_interrupts(dev);
 390
 391         if (dev->irq)
 392                 free_irq(dev->irq, dev);
 393
 394         mem_start = hw_priv->mem_start;
 395         prism2_free_local_data(dev);
 396         kfree(hw_priv);
 397
 398         iounmap(mem_start);
 399
 400         release_mem_region(pci_resource_start(pdev, 0),
 401                            pci_resource_len(pdev, 0));
 402         pci_disable_device(pdev);
 403 }
 404
 405
 406 #ifdef CONFIG_PM
 407 static int prism2_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 408 {
 409         struct net_device *dev = pci_get_drvdata(pdev);
 410
 411         if (netif_running(dev)) {
 412                 netif_stop_queue(dev);
 413                 netif_device_detach(dev);
 414         }
 415         prism2_suspend(dev);
 416         pci_save_state(pdev);
 417         pci_disable_device(pdev);
 418         pci_set_power_state(pdev, PCI_D3hot);
 419
 420         return 0;
 421 }
 422
 423 static int prism2_pci_resume(struct pci_dev *pdev)
 424 {
 425         struct net_device *dev = pci_get_drvdata(pdev);
 426         int err;
 427
 428         err = pci_enable_device(pdev);
 429         if (err) {
 430                 printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
 431                        dev->name);
 432                 return err;
 433         }
 434         pci_restore_state(pdev);
 435         prism2_hw_config(dev, 0);
 436         if (netif_running(dev)) {
 437                 netif_device_attach(dev);
 438                 netif_start_queue(dev);
 439         }
 440
 441         return 0;
 442 }
 443 #endif /* CONFIG_PM */
 444
 445
 446 MODULE_DEVICE_TABLE(pci, prism2_pci_id_table);
 447
 448 static struct pci_driver prism2_pci_driver = {
 449         .name           = "hostap_pci",
 450         .id_table       = prism2_pci_id_table,
 451         .probe          = prism2_pci_probe,
 452         .remove         = prism2_pci_remove,
 453 #ifdef CONFIG_PM
 454         .suspend        = prism2_pci_suspend,
 455         .resume         = prism2_pci_resume,
 456 #endif /* CONFIG_PM */
 457 };
 458
 459 module_pci_driver(prism2_pci_driver);