drivers/net/wireless/prism54/islpci_dev.c

   1 /*
   2  *
   3  *  Copyright (C) 2002 Intersil Americas Inc.
   4  *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
   5  *  Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <linux/version.h>
  23 #include <linux/module.h>
  24
  25 #include <linux/netdevice.h>
  26 #include <linux/pci.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/delay.h>
  29 #include <linux/if_arp.h>
  30
  31 #include <asm/io.h>
  32
  33 #include "isl_38xx.h"
  34 #include "isl_ioctl.h"
  35 #include "islpci_dev.h"
  36 #include "islpci_mgt.h"
  37 #include "islpci_eth.h"
  38 #include "oid_mgt.h"
  39
  40 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,5,0)
  41 #define prism54_synchronize_irq(irq) synchronize_irq()
  42 #else
  43 #define prism54_synchronize_irq(irq) synchronize_irq(irq)
  44 #endif
  45
  46 #define ISL3877_IMAGE_FILE      "isl3877"
  47 #define ISL3890_IMAGE_FILE      "isl3890"
  48
  49 /* Temporary dummy MAC address to use until firmware is loaded.
  50  * The idea there is that some tools (such as nameif) may query
  51  * the MAC address before the netdev is 'open'. By using a valid
  52  * OUI prefix, they can process the netdev properly.
  53  * Of course, this is not the final/real MAC address. It doesn't
  54  * matter, as you are suppose to be able to change it anytime via
  55  * ndev->set_mac_address. Jean II */
  56 const unsigned char     dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  57
  58 /******************************************************************************
  59     Device Interrupt Handler
  60 ******************************************************************************/
  61
  62 irqreturn_t
  63 islpci_interrupt(int irq, void *config, struct pt_regs *regs)
  64 {
  65         u32 reg;
  66         islpci_private *priv = config;
  67         struct net_device *ndev = priv->ndev;
  68         void *device = priv->device_base;
  69         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
  70
  71         /* received an interrupt request on a shared IRQ line
  72          * first check whether the device is in sleep mode */
  73         reg = readl(device + ISL38XX_CTRL_STAT_REG);
  74         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
  75                 /* device is in sleep mode, IRQ was generated by someone else */
  76         {
  77                 printk(KERN_DEBUG "Assuming someone else called the IRQ\n");
  78                 return IRQ_NONE;
  79         }
  80
  81         if (islpci_get_state(priv) != PRV_STATE_SLEEP)
  82                 powerstate = ISL38XX_PSM_ACTIVE_STATE;
  83
  84         /* lock the interrupt handler */
  85         spin_lock(&priv->slock);
  86
  87         /* check whether there is any source of interrupt on the device */
  88         reg = readl(device + ISL38XX_INT_IDENT_REG);
  89
  90         /* also check the contents of the Interrupt Enable Register, because this
  91          * will filter out interrupt sources from other devices on the same irq ! */
  92         reg &= readl(device + ISL38XX_INT_EN_REG);
  93         reg &= ISL38XX_INT_SOURCES;
  94
  95         if (reg != 0) {
  96                 /* reset the request bits in the Identification register */
  97                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
  98
  99 #if VERBOSE > SHOW_ERROR_MESSAGES
 100                 DEBUG(SHOW_FUNCTION_CALLS,
 101                       "IRQ: Identification register 0x%p 0x%x \n", device, reg);
 102 #endif
 103
 104                 /* check for each bit in the register separately */
 105                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 106 #if VERBOSE > SHOW_ERROR_MESSAGES
 107                         /* Queue has been updated */
 108                         DEBUG(SHOW_TRACING, "IRQ: Update flag \n");
 109
 110                         DEBUG(SHOW_QUEUE_INDEXES,
 111                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 112                               le32_to_cpu(priv->control_block->
 113                                           driver_curr_frag[0]),
 114                               le32_to_cpu(priv->control_block->
 115                                           driver_curr_frag[1]),
 116                               le32_to_cpu(priv->control_block->
 117                                           driver_curr_frag[2]),
 118                               le32_to_cpu(priv->control_block->
 119                                           driver_curr_frag[3]),
 120                               le32_to_cpu(priv->control_block->
 121                                           driver_curr_frag[4]),
 122                               le32_to_cpu(priv->control_block->
 123                                           driver_curr_frag[5])
 124                             );
 125
 126                         DEBUG(SHOW_QUEUE_INDEXES,
 127                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 128                               le32_to_cpu(priv->control_block->
 129                                           device_curr_frag[0]),
 130                               le32_to_cpu(priv->control_block->
 131                                           device_curr_frag[1]),
 132                               le32_to_cpu(priv->control_block->
 133                                           device_curr_frag[2]),
 134                               le32_to_cpu(priv->control_block->
 135                                           device_curr_frag[3]),
 136                               le32_to_cpu(priv->control_block->
 137                                           device_curr_frag[4]),
 138                               le32_to_cpu(priv->control_block->
 139                                           device_curr_frag[5])
 140                             );
 141 #endif
 142
 143                         /* cleanup the data low transmit queue */
 144                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 145
 146                         /* device is in active state, update the
 147                          * powerstate flag if necessary */
 148                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 149
 150                         /* check all three queues in priority order
 151                          * call the PIMFOR receive function until the
 152                          * queue is empty */
 153                         if (isl38xx_in_queue(priv->control_block,
 154                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 155 #if VERBOSE > SHOW_ERROR_MESSAGES
 156                                 DEBUG(SHOW_TRACING,
 157                                       "Received frame in Management Queue\n");
 158 #endif
 159                                 islpci_mgt_receive(ndev);
 160
 161                                 islpci_mgt_cleanup_transmit(ndev);
 162
 163                                 /* Refill slots in receive queue */
 164                                 islpci_mgmt_rx_fill(ndev);
 165
 166                                 /* no need to trigger the device, next
 167                                    islpci_mgt_transaction does it */
 168                         }
 169
 170                         while (isl38xx_in_queue(priv->control_block,
 171                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 172 #if VERBOSE > SHOW_ERROR_MESSAGES
 173                                 DEBUG(SHOW_TRACING,
 174                                       "Received frame in Data Low Queue \n");
 175 #endif
 176                                 islpci_eth_receive(priv);
 177                         }
 178
 179                         /* check whether the data transmit queues were full */
 180                         if (priv->data_low_tx_full) {
 181                                 /* check whether the transmit is not full anymore */
 182                                 if (ISL38XX_CB_TX_QSIZE -
 183                                     isl38xx_in_queue(priv->control_block,
 184                                                      ISL38XX_CB_TX_DATA_LQ) >=
 185                                     ISL38XX_MIN_QTHRESHOLD) {
 186                                         /* nope, the driver is ready for more network frames */
 187                                         netif_wake_queue(priv->ndev);
 188
 189                                         /* reset the full flag */
 190                                         priv->data_low_tx_full = 0;
 191                                 }
 192                         }
 193                 }
 194
 195                 if (reg & ISL38XX_INT_IDENT_INIT) {
 196                         /* Device has been initialized */
 197 #if VERBOSE > SHOW_ERROR_MESSAGES
 198                         DEBUG(SHOW_TRACING,
 199                               "IRQ: Init flag, device initialized \n");
 200 #endif
 201                         wake_up(&priv->reset_done);
 202                 }
 203
 204                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 205                         /* Device intends to move to powersave state */
 206 #if VERBOSE > SHOW_ERROR_MESSAGES
 207                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n");
 208 #endif
 209                         isl38xx_handle_sleep_request(priv->control_block,
 210                                                      &powerstate,
 211                                                      priv->device_base);
 212                 }
 213
 214                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 215                         /* Device has been woken up to active state */
 216 #if VERBOSE > SHOW_ERROR_MESSAGES
 217                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n");
 218 #endif
 219
 220                         isl38xx_handle_wakeup(priv->control_block,
 221                                               &powerstate, priv->device_base);
 222                 }
 223         }
 224
 225         /* sleep -> ready */
 226         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 227             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 228                 islpci_set_state(priv, PRV_STATE_READY);
 229
 230         /* !sleep -> sleep */
 231         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 232             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 233                 islpci_set_state(priv, PRV_STATE_SLEEP);
 234
 235         /* unlock the interrupt handler */
 236         spin_unlock(&priv->slock);
 237
 238         return IRQ_HANDLED;
 239 }
 240
 241 /******************************************************************************
 242     Network Interface Control & Statistical functions
 243 ******************************************************************************/
 244 static int
 245 islpci_open(struct net_device *ndev)
 246 {
 247         u32 rc;
 248         islpci_private *priv = netdev_priv(ndev);
 249
 250         printk(KERN_DEBUG "%s: islpci_open()\n", ndev->name);
 251
 252         /* reset data structures, upload firmware and reset device */
 253         rc = islpci_reset(priv,1);
 254         if (rc) {
 255                 prism54_bring_down(priv);
 256                 return rc; /* Returns informative message */
 257         }
 258
 259         netif_start_queue(ndev);
 260 /*      netif_mark_up( ndev ); */
 261
 262         return 0;
 263 }
 264
 265 static int
 266 islpci_close(struct net_device *ndev)
 267 {
 268         islpci_private *priv = netdev_priv(ndev);
 269
 270         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 271
 272         netif_stop_queue(ndev);
 273
 274         return prism54_bring_down(priv);
 275 }
 276
 277 int
 278 prism54_bring_down(islpci_private *priv)
 279 {
 280         void *device_base = priv->device_base;
 281         u32 reg;
 282         /* we are going to shutdown the device */
 283         islpci_set_state(priv, PRV_STATE_PREBOOT);
 284
 285         /* disable all device interrupts in case they weren't */
 286         isl38xx_disable_interrupts(priv->device_base);
 287
 288         /* For safety reasons, we may want to ensure that no DMA transfer is
 289          * currently in progress by emptying the TX and RX queues. */
 290
 291         /* wait until interrupts have finished executing on other CPUs */
 292         prism54_synchronize_irq(priv->pdev->irq);
 293
 294         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 295         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 296         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 297         wmb();
 298         udelay(ISL38XX_WRITEIO_DELAY);
 299
 300         reg |= ISL38XX_CTRL_STAT_RESET;
 301         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 302         wmb();
 303         udelay(ISL38XX_WRITEIO_DELAY);
 304
 305         /* clear the Reset bit */
 306         reg &= ~ISL38XX_CTRL_STAT_RESET;
 307         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 308         wmb();
 309
 310         /* wait a while for the device to reset */
 311         set_current_state(TASK_UNINTERRUPTIBLE);
 312         schedule_timeout(50*HZ/1000);
 313
 314         return 0;
 315 }
 316
 317 static int
 318 islpci_upload_fw(islpci_private *priv)
 319 {
 320         islpci_state_t old_state;
 321         u32 rc;
 322
 323         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 324
 325         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 326
 327         rc = isl38xx_upload_firmware(priv->firmware,
 328 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,75))
 329                 &priv->pdev->dev,
 330 #else
 331                 pci_name(priv->pdev),
 332 #endif
 333                 priv->device_base,
 334                 priv->device_host_address);
 335         if (rc) {
 336                 /* error uploading the firmware */
 337                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 338                        priv->ndev->name, priv->firmware);
 339
 340                 islpci_set_state(priv, old_state);
 341                 return rc;
 342         }
 343
 344         printk(KERN_DEBUG
 345                "%s: firmware uploaded done, now triggering reset...\n",
 346                priv->ndev->name);
 347
 348         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 349
 350         return 0;
 351 }
 352
 353 static int
 354 islpci_reset_if(islpci_private *priv)
 355 {
 356         long remaining;
 357         int result = -ETIME;
 358         int count;
 359
 360 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 361         /* This is 2.6 specific, nicer, shorter, but not in 2.4 yet */
 362         DEFINE_WAIT(wait);
 363         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 364 #else
 365         DECLARE_WAITQUEUE(wait, current);
 366         set_current_state(TASK_UNINTERRUPTIBLE);
 367         add_wait_queue(&priv->reset_done, &wait);
 368 #endif
 369
 370         /* now the last step is to reset the interface */
 371         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 372         islpci_set_state(priv, PRV_STATE_PREINIT);
 373
 374         for(count = 0; count < 2 && result; count++) {
 375                 /* The software reset acknowledge needs about 220 msec here.
 376                  * Be conservative and wait for up to one second. */
 377
 378                 remaining = schedule_timeout(HZ);
 379
 380                 if(remaining > 0) {
 381                         result = 0;
 382                         break;
 383                 }
 384
 385                 /* If we're here it's because our IRQ hasn't yet gone through.
 386                  * Retry a bit more...
 387                  */
 388                  printk(KERN_ERR "%s: device soft reset timed out\n",
 389                        priv->ndev->name);
 390
 391         }
 392
 393 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 394         /* 2.6 specific too */
 395         finish_wait(&priv->reset_done, &wait);
 396 #else
 397         remove_wait_queue(&priv->reset_done, &wait);
 398         set_current_state(TASK_RUNNING);
 399 #endif
 400
 401         if(result)
 402                 return result;
 403
 404         islpci_set_state(priv, PRV_STATE_INIT);
 405
 406         /* Now that the device is 100% up, let's allow
 407          * for the other interrupts --
 408          * NOTE: this is not *yet* true since we've only allowed the
 409          * INIT interrupt on the IRQ line. We can perhaps poll
 410          * the IRQ line until we know for sure the reset went through */
 411         isl38xx_enable_common_interrupts(priv->device_base);
 412
 413         prism54_mib_init_work(priv);
 414
 415         islpci_set_state(priv, PRV_STATE_READY);
 416
 417         return 0;
 418 }
 419
 420 int
 421 islpci_reset(islpci_private *priv, int reload_firmware)
 422 {
 423         isl38xx_control_block *cb =    /* volatile not needed */
 424                 (isl38xx_control_block *) priv->control_block;
 425         unsigned counter;
 426         int rc;
 427
 428         if (reload_firmware)
 429                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 430         else
 431                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 432
 433         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 434
 435         /* disable all device interrupts in case they weren't */
 436         isl38xx_disable_interrupts(priv->device_base);
 437
 438         /* flush all management queues */
 439         priv->index_mgmt_tx = 0;
 440         priv->index_mgmt_rx = 0;
 441
 442         /* clear the indexes in the frame pointer */
 443         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 444                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 445                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 446         }
 447
 448         /* reset the mgmt receive queue */
 449         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 450                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 451                 frag->size = MGMT_FRAME_SIZE;
 452                 frag->flags = 0;
 453                 frag->address = priv->mgmt_rx[counter].pci_addr;
 454         }
 455
 456         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 457                 cb->rx_data_low[counter].address =
 458                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 459         }
 460
 461         /* since the receive queues are filled with empty fragments, now we can
 462          * set the corresponding indexes in the Control Block */
 463         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 464             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 465         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 466             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 467
 468         /* reset the remaining real index registers and full flags */
 469         priv->free_data_rx = 0;
 470         priv->free_data_tx = 0;
 471         priv->data_low_tx_full = 0;
 472
 473         if (reload_firmware) { /* Should we load the firmware ? */
 474         /* now that the data structures are cleaned up, upload
 475          * firmware and reset interface */
 476                 rc = islpci_upload_fw(priv);
 477                 if (rc)
 478                         return rc;
 479         }
 480
 481         /* finally reset interface */
 482         rc = islpci_reset_if(priv);
 483         if (!rc) /* If successful */
 484                 return rc;
 485
 486         printk(KERN_DEBUG  "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 487         return rc;
 488
 489 }
 490
 491 struct net_device_stats *
 492 islpci_statistics(struct net_device *ndev)
 493 {
 494         islpci_private *priv = netdev_priv(ndev);
 495
 496 #if VERBOSE > SHOW_ERROR_MESSAGES
 497         DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics \n");
 498 #endif
 499
 500         return &priv->statistics;
 501 }
 502
 503 /******************************************************************************
 504     Network device configuration functions
 505 ******************************************************************************/
 506 int
 507 islpci_alloc_memory(islpci_private *priv)
 508 {
 509         int counter;
 510
 511 #if VERBOSE > SHOW_ERROR_MESSAGES
 512         printk(KERN_DEBUG "islpci_alloc_memory\n");
 513 #endif
 514
 515         /* remap the PCI device base address to accessable */
 516         if (!(priv->device_base =
 517               ioremap(pci_resource_start(priv->pdev, 0),
 518                       ISL38XX_PCI_MEM_SIZE))) {
 519                 /* error in remapping the PCI device memory address range */
 520                 printk(KERN_ERR "PCI memory remapping failed \n");
 521                 return -1;
 522         }
 523
 524         /* memory layout for consistent DMA region:
 525          *
 526          * Area 1: Control Block for the device interface
 527          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 528          *         the number of supported stations in the AP determines the minimal
 529          *         size of the buffer !
 530          */
 531
 532         /* perform the allocation */
 533         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 534                                                         HOST_MEM_BLOCK,
 535                                                         &priv->
 536                                                         device_host_address);
 537
 538         if (!priv->driver_mem_address) {
 539                 /* error allocating the block of PCI memory */
 540                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 541                        "prism54");
 542                 return -1;
 543         }
 544
 545         /* assign the Control Block to the first address of the allocated area */
 546         priv->control_block =
 547             (isl38xx_control_block *) priv->driver_mem_address;
 548
 549         /* set the Power Save Buffer pointer directly behind the CB */
 550         priv->device_psm_buffer =
 551                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 552
 553         /* make sure all buffer pointers are initialized */
 554         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 555                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 556                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 557         }
 558
 559         priv->index_mgmt_rx = 0;
 560         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 561         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 562
 563         /* allocate rx queue for management frames */
 564         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 565                 goto out_free;
 566
 567         /* now get the data rx skb's */
 568         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 569         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 570
 571         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 572                 struct sk_buff *skb;
 573
 574                 /* allocate an sk_buff for received data frames storage
 575                  * each frame on receive size consists of 1 fragment
 576                  * include any required allignment operations */
 577                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 578                         /* error allocating an sk_buff structure elements */
 579                         printk(KERN_ERR "Error allocating skb.\n");
 580                         skb = NULL;
 581                         goto out_free;
 582                 }
 583                 /* add the new allocated sk_buff to the buffer array */
 584                 priv->data_low_rx[counter] = skb;
 585
 586                 /* map the allocated skb data area to pci */
 587                 priv->pci_map_rx_address[counter] =
 588                     pci_map_single(priv->pdev, (void *) skb->data,
 589                                    MAX_FRAGMENT_SIZE_RX + 2,
 590                                    PCI_DMA_FROMDEVICE);
 591                 if (!priv->pci_map_rx_address[counter]) {
 592                         /* error mapping the buffer to device
 593                            accessable memory address */
 594                         printk(KERN_ERR "failed to map skb DMA'able\n");
 595                         goto out_free;
 596                 }
 597         }
 598
 599         prism54_acl_init(&priv->acl);
 600         prism54_wpa_ie_init(priv);
 601         if (mgt_init(priv))
 602                 goto out_free;
 603
 604         return 0;
 605  out_free:
 606         islpci_free_memory(priv);
 607         return -1;
 608 }
 609
 610 int
 611 islpci_free_memory(islpci_private *priv)
 612 {
 613         int counter;
 614
 615         if (priv->device_base)
 616                 iounmap(priv->device_base);
 617         priv->device_base = 0;
 618
 619         /* free consistent DMA area... */
 620         if (priv->driver_mem_address)
 621                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 622                                     priv->driver_mem_address,
 623                                     priv->device_host_address);
 624
 625         /* clear some dangling pointers */
 626         priv->driver_mem_address = 0;
 627         priv->device_host_address = 0;
 628         priv->device_psm_buffer = 0;
 629         priv->control_block = 0;
 630
 631         /* clean up mgmt rx buffers */
 632         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 633                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 634                 if (buf->pci_addr)
 635                         pci_unmap_single(priv->pdev, buf->pci_addr,
 636                                          buf->size, PCI_DMA_FROMDEVICE);
 637                 buf->pci_addr = 0;
 638                 if (buf->mem)
 639                         kfree(buf->mem);
 640                 buf->size = 0;
 641                 buf->mem = NULL;
 642         }
 643
 644         /* clean up data rx buffers */
 645         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 646                 if (priv->pci_map_rx_address[counter])
 647                         pci_unmap_single(priv->pdev,
 648                                          priv->pci_map_rx_address[counter],
 649                                          MAX_FRAGMENT_SIZE_RX + 2,
 650                                          PCI_DMA_FROMDEVICE);
 651                 priv->pci_map_rx_address[counter] = 0;
 652
 653                 if (priv->data_low_rx[counter])
 654                         dev_kfree_skb(priv->data_low_rx[counter]);
 655                 priv->data_low_rx[counter] = 0;
 656         }
 657
 658         /* Free the acces control list and the WPA list */
 659         prism54_acl_clean(&priv->acl);
 660         prism54_wpa_ie_clean(priv);
 661         mgt_clean(priv);
 662
 663         return 0;
 664 }
 665
 666 #if 0
 667 static void
 668 islpci_set_multicast_list(struct net_device *dev)
 669 {
 670         /* put device into promisc mode and let network layer handle it */
 671 }
 672 #endif
 673
 674 struct net_device *
 675 islpci_setup(struct pci_dev *pdev)
 676 {
 677         islpci_private *priv;
 678         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 679
 680         if (!ndev)
 681                 return ndev;
 682
 683         SET_MODULE_OWNER(ndev);
 684         pci_set_drvdata(pdev, ndev);
 685 #if defined(SET_NETDEV_DEV)
 686         SET_NETDEV_DEV(ndev, &pdev->dev);
 687 #endif
 688
 689         /* setup the structure members */
 690         ndev->base_addr = pci_resource_start(pdev, 0);
 691         ndev->irq = pdev->irq;
 692
 693         /* initialize the function pointers */
 694         ndev->open = &islpci_open;
 695         ndev->stop = &islpci_close;
 696         ndev->get_stats = &islpci_statistics;
 697         ndev->get_wireless_stats = &prism54_get_wireless_stats;
 698         ndev->do_ioctl = &prism54_ioctl;
 699         ndev->wireless_handlers =
 700             (struct iw_handler_def *) &prism54_handler_def;
 701
 702         ndev->hard_start_xmit = &islpci_eth_transmit;
 703         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 704         ndev->addr_len = ETH_ALEN;
 705         ndev->set_mac_address = &prism54_set_mac_address;
 706         /* Get a non-zero dummy MAC address for nameif. Jean II */
 707         memcpy(ndev->dev_addr, dummy_mac, 6);
 708
 709 #ifdef HAVE_TX_TIMEOUT
 710         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 711         ndev->tx_timeout = &islpci_eth_tx_timeout;
 712 #endif
 713
 714         /* allocate a private device structure to the network device  */
 715         priv = netdev_priv(ndev);
 716         priv->ndev = ndev;
 717         priv->pdev = pdev;
 718         priv->monitor_type = ARPHRD_IEEE80211;
 719         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 720                 priv->monitor_type : ARPHRD_ETHER;
 721
 722         /* save the start and end address of the PCI memory area */
 723         ndev->mem_start = (unsigned long) priv->device_base;
 724         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 725
 726 #if VERBOSE > SHOW_ERROR_MESSAGES
 727         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 728 #endif
 729
 730         init_waitqueue_head(&priv->reset_done);
 731
 732         /* init the queue read locks, process wait counter */
 733         sema_init(&priv->mgmt_sem, 1);
 734         priv->mgmt_received = NULL;
 735         init_waitqueue_head(&priv->mgmt_wqueue);
 736         sema_init(&priv->stats_sem, 1);
 737         spin_lock_init(&priv->slock);
 738
 739         /* init state machine with off#1 state */
 740         priv->state = PRV_STATE_OFF;
 741         priv->state_off = 1;
 742
 743         /* initialize workqueue's */
 744         INIT_WORK(&priv->stats_work,
 745                   (void (*)(void *)) prism54_update_stats, priv);
 746         priv->stats_timestamp = 0;
 747
 748         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake, priv);
 749         priv->reset_task_pending = 0;
 750
 751         /* allocate various memory areas */
 752         if (islpci_alloc_memory(priv))
 753                 goto do_free_netdev;
 754
 755         /* select the firmware file depending on the device id */
 756         switch (pdev->device) {
 757         case PCIDEVICE_ISL3890:
 758         case PCIDEVICE_3COM6001:
 759                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 760                 break;
 761         case PCIDEVICE_ISL3877:
 762                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 763                 break;
 764
 765         default:
 766                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 767                 break;
 768         }
 769
 770         if (register_netdev(ndev)) {
 771                 DEBUG(SHOW_ERROR_MESSAGES,
 772                       "ERROR: register_netdev() failed \n");
 773                 goto do_islpci_free_memory;
 774         }
 775
 776         return ndev;
 777
 778       do_islpci_free_memory:
 779         islpci_free_memory(priv);
 780       do_free_netdev:
 781         pci_set_drvdata(pdev, 0);
 782         free_netdev(ndev);
 783         priv = 0;
 784         return NULL;
 785 }
 786
 787 islpci_state_t
 788 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 789 {
 790         islpci_state_t old_state;
 791
 792         /* lock */
 793         old_state = priv->state;
 794
 795         /* this means either a race condition or some serious error in
 796          * the driver code */
 797         switch (new_state) {
 798         case PRV_STATE_OFF:
 799                 priv->state_off++;
 800         default:
 801                 priv->state = new_state;
 802                 break;
 803
 804         case PRV_STATE_PREBOOT:
 805                 /* there are actually many off-states, enumerated by
 806                  * state_off */
 807                 if (old_state == PRV_STATE_OFF)
 808                         priv->state_off--;
 809
 810                 /* only if hw_unavailable is zero now it means we either
 811                  * were in off#1 state, or came here from
 812                  * somewhere else */
 813                 if (!priv->state_off)
 814                         priv->state = new_state;
 815                 break;
 816         };
 817 #if 0
 818         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 819                priv->ndev->name, old_state, new_state, priv->state_off);
 820 #endif
 821
 822         /* invariants */
 823         BUG_ON(priv->state_off < 0);
 824         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 825         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 826
 827         /* unlock */
 828         return old_state;
 829 }