git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/prism54/islpci_dev.c

   1 /*
   2  *  Copyright (C) 2002 Intersil Americas Inc.
   3  *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
   4  *  Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20
  21 #include <linux/module.h>
  22
  23 #include <linux/netdevice.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/pci.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/delay.h>
  28 #include <linux/if_arp.h>
  29
  30 #include <asm/io.h>
  31
  32 #include "prismcompat.h"
  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 #define ISL3877_IMAGE_FILE      "isl3877"
  41 #define ISL3886_IMAGE_FILE      "isl3886"
  42 #define ISL3890_IMAGE_FILE      "isl3890"
  43
  44 static int prism54_bring_down(islpci_private *);
  45 static int islpci_alloc_memory(islpci_private *);
  46
  47 /* Temporary dummy MAC address to use until firmware is loaded.
  48  * The idea there is that some tools (such as nameif) may query
  49  * the MAC address before the netdev is 'open'. By using a valid
  50  * OUI prefix, they can process the netdev properly.
  51  * Of course, this is not the final/real MAC address. It doesn't
  52  * matter, as you are suppose to be able to change it anytime via
  53  * ndev->set_mac_address. Jean II */
  54 static const unsigned char      dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  55
  56 static int
  57 isl_upload_firmware(islpci_private *priv)
  58 {
  59         u32 reg, rc;
  60         void __iomem *device_base = priv->device_base;
  61
  62         /* clear the RAMBoot and the Reset bit */
  63         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  64         reg &= ~ISL38XX_CTRL_STAT_RESET;
  65         reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  66         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  67         wmb();
  68         udelay(ISL38XX_WRITEIO_DELAY);
  69
  70         /* set the Reset bit without reading the register ! */
  71         reg |= ISL38XX_CTRL_STAT_RESET;
  72         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  73         wmb();
  74         udelay(ISL38XX_WRITEIO_DELAY);
  75
  76         /* clear the Reset bit */
  77         reg &= ~ISL38XX_CTRL_STAT_RESET;
  78         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  79         wmb();
  80
  81         /* wait a while for the device to reboot */
  82         mdelay(50);
  83
  84         {
  85                 const struct firmware *fw_entry = NULL;
  86                 long fw_len;
  87                 const u32 *fw_ptr;
  88
  89                 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  90                 if (rc) {
  91                         printk(KERN_ERR
  92                                "%s: request_firmware() failed for '%s'\n",
  93                                "prism54", priv->firmware);
  94                         return rc;
  95                 }
  96                 /* prepare the Direct Memory Base register */
  97                 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
  98
  99                 fw_ptr = (u32 *) fw_entry->data;
 100                 fw_len = fw_entry->size;
 101
 102                 if (fw_len % 4) {
 103                         printk(KERN_ERR
 104                                "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
 105                                "prism54", priv->firmware);
 106                         release_firmware(fw_entry);
 107                         return -EILSEQ; /* Illegal byte sequence  */;
 108                 }
 109
 110                 while (fw_len > 0) {
 111                         long _fw_len =
 112                             (fw_len >
 113                              ISL38XX_MEMORY_WINDOW_SIZE) ?
 114                             ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 115                         u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 116
 117                         /* set the card's base address for writing the data */
 118                         isl38xx_w32_flush(device_base, reg,
 119                                           ISL38XX_DIR_MEM_BASE_REG);
 120                         wmb();  /* be paranoid */
 121
 122                         /* increment the write address for next iteration */
 123                         reg += _fw_len;
 124                         fw_len -= _fw_len;
 125
 126                         /* write the data to the Direct Memory Window 32bit-wise */
 127                         /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 128                         while (_fw_len > 0) {
 129                                 /* use non-swapping writel() */
 130                                 __raw_writel(*fw_ptr, dev_fw_ptr);
 131                                 fw_ptr++, dev_fw_ptr++;
 132                                 _fw_len -= 4;
 133                         }
 134
 135                         /* flush PCI posting */
 136                         (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 137                         wmb();  /* be paranoid again */
 138
 139                         BUG_ON(_fw_len != 0);
 140                 }
 141
 142                 BUG_ON(fw_len != 0);
 143
 144                 /* Firmware version is at offset 40 (also for "newmac") */
 145                 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
 146                        priv->ndev->name, fw_entry->data + 40);
 147
 148                 release_firmware(fw_entry);
 149         }
 150
 151         /* now reset the device
 152          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 153         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 154         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 155         reg &= ~ISL38XX_CTRL_STAT_RESET;
 156         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 157         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 158         wmb();
 159         udelay(ISL38XX_WRITEIO_DELAY);
 160
 161         /* set the reset bit latches the host override and RAMBoot bits
 162          * into the device for operation when the reset bit is reset */
 163         reg |= ISL38XX_CTRL_STAT_RESET;
 164         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 165         /* don't do flush PCI posting here! */
 166         wmb();
 167         udelay(ISL38XX_WRITEIO_DELAY);
 168
 169         /* clear the reset bit should start the whole circus */
 170         reg &= ~ISL38XX_CTRL_STAT_RESET;
 171         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 172         /* don't do flush PCI posting here! */
 173         wmb();
 174         udelay(ISL38XX_WRITEIO_DELAY);
 175
 176         return 0;
 177 }
 178
 179 /******************************************************************************
 180     Device Interrupt Handler
 181 ******************************************************************************/
 182
 183 irqreturn_t
 184 islpci_interrupt(int irq, void *config)
 185 {
 186         u32 reg;
 187         islpci_private *priv = config;
 188         struct net_device *ndev = priv->ndev;
 189         void __iomem *device = priv->device_base;
 190         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 191
 192         /* lock the interrupt handler */
 193         spin_lock(&priv->slock);
 194
 195         /* received an interrupt request on a shared IRQ line
 196          * first check whether the device is in sleep mode */
 197         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 198         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 199                 /* device is in sleep mode, IRQ was generated by someone else */
 200         {
 201 #if VERBOSE > SHOW_ERROR_MESSAGES
 202                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 203 #endif
 204                 spin_unlock(&priv->slock);
 205                 return IRQ_NONE;
 206         }
 207
 208
 209         /* check whether there is any source of interrupt on the device */
 210         reg = readl(device + ISL38XX_INT_IDENT_REG);
 211
 212         /* also check the contents of the Interrupt Enable Register, because this
 213          * will filter out interrupt sources from other devices on the same irq ! */
 214         reg &= readl(device + ISL38XX_INT_EN_REG);
 215         reg &= ISL38XX_INT_SOURCES;
 216
 217         if (reg != 0) {
 218                 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 219                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 220
 221                 /* reset the request bits in the Identification register */
 222                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 223
 224 #if VERBOSE > SHOW_ERROR_MESSAGES
 225                 DEBUG(SHOW_FUNCTION_CALLS,
 226                       "IRQ: Identification register 0x%p 0x%x \n", device, reg);
 227 #endif
 228
 229                 /* check for each bit in the register separately */
 230                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 231 #if VERBOSE > SHOW_ERROR_MESSAGES
 232                         /* Queue has been updated */
 233                         DEBUG(SHOW_TRACING, "IRQ: Update flag \n");
 234
 235                         DEBUG(SHOW_QUEUE_INDEXES,
 236                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 237                               le32_to_cpu(priv->control_block->
 238                                           driver_curr_frag[0]),
 239                               le32_to_cpu(priv->control_block->
 240                                           driver_curr_frag[1]),
 241                               le32_to_cpu(priv->control_block->
 242                                           driver_curr_frag[2]),
 243                               le32_to_cpu(priv->control_block->
 244                                           driver_curr_frag[3]),
 245                               le32_to_cpu(priv->control_block->
 246                                           driver_curr_frag[4]),
 247                               le32_to_cpu(priv->control_block->
 248                                           driver_curr_frag[5])
 249                             );
 250
 251                         DEBUG(SHOW_QUEUE_INDEXES,
 252                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 253                               le32_to_cpu(priv->control_block->
 254                                           device_curr_frag[0]),
 255                               le32_to_cpu(priv->control_block->
 256                                           device_curr_frag[1]),
 257                               le32_to_cpu(priv->control_block->
 258                                           device_curr_frag[2]),
 259                               le32_to_cpu(priv->control_block->
 260                                           device_curr_frag[3]),
 261                               le32_to_cpu(priv->control_block->
 262                                           device_curr_frag[4]),
 263                               le32_to_cpu(priv->control_block->
 264                                           device_curr_frag[5])
 265                             );
 266 #endif
 267
 268                         /* cleanup the data low transmit queue */
 269                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 270
 271                         /* device is in active state, update the
 272                          * powerstate flag if necessary */
 273                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 274
 275                         /* check all three queues in priority order
 276                          * call the PIMFOR receive function until the
 277                          * queue is empty */
 278                         if (isl38xx_in_queue(priv->control_block,
 279                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 280 #if VERBOSE > SHOW_ERROR_MESSAGES
 281                                 DEBUG(SHOW_TRACING,
 282                                       "Received frame in Management Queue\n");
 283 #endif
 284                                 islpci_mgt_receive(ndev);
 285
 286                                 islpci_mgt_cleanup_transmit(ndev);
 287
 288                                 /* Refill slots in receive queue */
 289                                 islpci_mgmt_rx_fill(ndev);
 290
 291                                 /* no need to trigger the device, next
 292                                    islpci_mgt_transaction does it */
 293                         }
 294
 295                         while (isl38xx_in_queue(priv->control_block,
 296                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 297 #if VERBOSE > SHOW_ERROR_MESSAGES
 298                                 DEBUG(SHOW_TRACING,
 299                                       "Received frame in Data Low Queue \n");
 300 #endif
 301                                 islpci_eth_receive(priv);
 302                         }
 303
 304                         /* check whether the data transmit queues were full */
 305                         if (priv->data_low_tx_full) {
 306                                 /* check whether the transmit is not full anymore */
 307                                 if (ISL38XX_CB_TX_QSIZE -
 308                                     isl38xx_in_queue(priv->control_block,
 309                                                      ISL38XX_CB_TX_DATA_LQ) >=
 310                                     ISL38XX_MIN_QTHRESHOLD) {
 311                                         /* nope, the driver is ready for more network frames */
 312                                         netif_wake_queue(priv->ndev);
 313
 314                                         /* reset the full flag */
 315                                         priv->data_low_tx_full = 0;
 316                                 }
 317                         }
 318                 }
 319
 320                 if (reg & ISL38XX_INT_IDENT_INIT) {
 321                         /* Device has been initialized */
 322 #if VERBOSE > SHOW_ERROR_MESSAGES
 323                         DEBUG(SHOW_TRACING,
 324                               "IRQ: Init flag, device initialized \n");
 325 #endif
 326                         wake_up(&priv->reset_done);
 327                 }
 328
 329                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 330                         /* Device intends to move to powersave state */
 331 #if VERBOSE > SHOW_ERROR_MESSAGES
 332                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n");
 333 #endif
 334                         isl38xx_handle_sleep_request(priv->control_block,
 335                                                      &powerstate,
 336                                                      priv->device_base);
 337                 }
 338
 339                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 340                         /* Device has been woken up to active state */
 341 #if VERBOSE > SHOW_ERROR_MESSAGES
 342                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n");
 343 #endif
 344
 345                         isl38xx_handle_wakeup(priv->control_block,
 346                                               &powerstate, priv->device_base);
 347                 }
 348         } else {
 349 #if VERBOSE > SHOW_ERROR_MESSAGES
 350                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 351 #endif
 352                 spin_unlock(&priv->slock);
 353                 return IRQ_NONE;
 354         }
 355
 356         /* sleep -> ready */
 357         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 358             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 359                 islpci_set_state(priv, PRV_STATE_READY);
 360
 361         /* !sleep -> sleep */
 362         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 363             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 364                 islpci_set_state(priv, PRV_STATE_SLEEP);
 365
 366         /* unlock the interrupt handler */
 367         spin_unlock(&priv->slock);
 368
 369         return IRQ_HANDLED;
 370 }
 371
 372 /******************************************************************************
 373     Network Interface Control & Statistical functions
 374 ******************************************************************************/
 375 static int
 376 islpci_open(struct net_device *ndev)
 377 {
 378         u32 rc;
 379         islpci_private *priv = netdev_priv(ndev);
 380
 381         /* reset data structures, upload firmware and reset device */
 382         rc = islpci_reset(priv,1);
 383         if (rc) {
 384                 prism54_bring_down(priv);
 385                 return rc; /* Returns informative message */
 386         }
 387
 388         netif_start_queue(ndev);
 389
 390         /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
 391          * once the firmware receives a trap of being associated
 392          * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
 393          * should just leave the carrier on as its expected the firmware
 394          * won't send us a trigger. */
 395         if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
 396                 netif_carrier_off(ndev);
 397         else
 398                 netif_carrier_on(ndev);
 399
 400         return 0;
 401 }
 402
 403 static int
 404 islpci_close(struct net_device *ndev)
 405 {
 406         islpci_private *priv = netdev_priv(ndev);
 407
 408         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 409
 410         netif_stop_queue(ndev);
 411
 412         return prism54_bring_down(priv);
 413 }
 414
 415 static int
 416 prism54_bring_down(islpci_private *priv)
 417 {
 418         void __iomem *device_base = priv->device_base;
 419         u32 reg;
 420         /* we are going to shutdown the device */
 421         islpci_set_state(priv, PRV_STATE_PREBOOT);
 422
 423         /* disable all device interrupts in case they weren't */
 424         isl38xx_disable_interrupts(priv->device_base);
 425
 426         /* For safety reasons, we may want to ensure that no DMA transfer is
 427          * currently in progress by emptying the TX and RX queues. */
 428
 429         /* wait until interrupts have finished executing on other CPUs */
 430         synchronize_irq(priv->pdev->irq);
 431
 432         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 433         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 434         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 435         wmb();
 436         udelay(ISL38XX_WRITEIO_DELAY);
 437
 438         reg |= ISL38XX_CTRL_STAT_RESET;
 439         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 440         wmb();
 441         udelay(ISL38XX_WRITEIO_DELAY);
 442
 443         /* clear the Reset bit */
 444         reg &= ~ISL38XX_CTRL_STAT_RESET;
 445         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 446         wmb();
 447
 448         /* wait a while for the device to reset */
 449         schedule_timeout_uninterruptible(msecs_to_jiffies(50));
 450
 451         return 0;
 452 }
 453
 454 static int
 455 islpci_upload_fw(islpci_private *priv)
 456 {
 457         islpci_state_t old_state;
 458         u32 rc;
 459
 460         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 461
 462         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 463
 464         rc = isl_upload_firmware(priv);
 465         if (rc) {
 466                 /* error uploading the firmware */
 467                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 468                        priv->ndev->name, priv->firmware);
 469
 470                 islpci_set_state(priv, old_state);
 471                 return rc;
 472         }
 473
 474         printk(KERN_DEBUG "%s: firmware upload complete\n",
 475                priv->ndev->name);
 476
 477         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 478
 479         return 0;
 480 }
 481
 482 static int
 483 islpci_reset_if(islpci_private *priv)
 484 {
 485         long remaining;
 486         int result = -ETIME;
 487         int count;
 488
 489         DEFINE_WAIT(wait);
 490         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 491
 492         /* now the last step is to reset the interface */
 493         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 494         islpci_set_state(priv, PRV_STATE_PREINIT);
 495
 496         for(count = 0; count < 2 && result; count++) {
 497                 /* The software reset acknowledge needs about 220 msec here.
 498                  * Be conservative and wait for up to one second. */
 499
 500                 remaining = schedule_timeout_uninterruptible(HZ);
 501
 502                 if(remaining > 0) {
 503                         result = 0;
 504                         break;
 505                 }
 506
 507                 /* If we're here it's because our IRQ hasn't yet gone through.
 508                  * Retry a bit more...
 509                  */
 510                 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
 511                         priv->ndev->name);
 512         }
 513
 514         finish_wait(&priv->reset_done, &wait);
 515
 516         if (result) {
 517                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 518                 return result;
 519         }
 520
 521         islpci_set_state(priv, PRV_STATE_INIT);
 522
 523         /* Now that the device is 100% up, let's allow
 524          * for the other interrupts --
 525          * NOTE: this is not *yet* true since we've only allowed the
 526          * INIT interrupt on the IRQ line. We can perhaps poll
 527          * the IRQ line until we know for sure the reset went through */
 528         isl38xx_enable_common_interrupts(priv->device_base);
 529
 530         down_write(&priv->mib_sem);
 531         result = mgt_commit(priv);
 532         if (result) {
 533                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 534                 up_write(&priv->mib_sem);
 535                 return result;
 536         }
 537         up_write(&priv->mib_sem);
 538
 539         islpci_set_state(priv, PRV_STATE_READY);
 540
 541         printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
 542         return 0;
 543 }
 544
 545 int
 546 islpci_reset(islpci_private *priv, int reload_firmware)
 547 {
 548         isl38xx_control_block *cb =    /* volatile not needed */
 549                 (isl38xx_control_block *) priv->control_block;
 550         unsigned counter;
 551         int rc;
 552
 553         if (reload_firmware)
 554                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 555         else
 556                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 557
 558         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 559
 560         /* disable all device interrupts in case they weren't */
 561         isl38xx_disable_interrupts(priv->device_base);
 562
 563         /* flush all management queues */
 564         priv->index_mgmt_tx = 0;
 565         priv->index_mgmt_rx = 0;
 566
 567         /* clear the indexes in the frame pointer */
 568         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 569                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 570                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 571         }
 572
 573         /* reset the mgmt receive queue */
 574         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 575                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 576                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 577                 frag->flags = 0;
 578                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 579         }
 580
 581         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 582                 cb->rx_data_low[counter].address =
 583                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 584         }
 585
 586         /* since the receive queues are filled with empty fragments, now we can
 587          * set the corresponding indexes in the Control Block */
 588         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 589             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 590         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 591             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 592
 593         /* reset the remaining real index registers and full flags */
 594         priv->free_data_rx = 0;
 595         priv->free_data_tx = 0;
 596         priv->data_low_tx_full = 0;
 597
 598         if (reload_firmware) { /* Should we load the firmware ? */
 599         /* now that the data structures are cleaned up, upload
 600          * firmware and reset interface */
 601                 rc = islpci_upload_fw(priv);
 602                 if (rc) {
 603                         printk(KERN_ERR "%s: islpci_reset: failure\n",
 604                                 priv->ndev->name);
 605                         return rc;
 606                 }
 607         }
 608
 609         /* finally reset interface */
 610         rc = islpci_reset_if(priv);
 611         if (rc)
 612                 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 613         return rc;
 614 }
 615
 616 /******************************************************************************
 617     Network device configuration functions
 618 ******************************************************************************/
 619 static int
 620 islpci_alloc_memory(islpci_private *priv)
 621 {
 622         int counter;
 623
 624 #if VERBOSE > SHOW_ERROR_MESSAGES
 625         printk(KERN_DEBUG "islpci_alloc_memory\n");
 626 #endif
 627
 628         /* remap the PCI device base address to accessable */
 629         if (!(priv->device_base =
 630               ioremap(pci_resource_start(priv->pdev, 0),
 631                       ISL38XX_PCI_MEM_SIZE))) {
 632                 /* error in remapping the PCI device memory address range */
 633                 printk(KERN_ERR "PCI memory remapping failed \n");
 634                 return -1;
 635         }
 636
 637         /* memory layout for consistent DMA region:
 638          *
 639          * Area 1: Control Block for the device interface
 640          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 641          *         the number of supported stations in the AP determines the minimal
 642          *         size of the buffer !
 643          */
 644
 645         /* perform the allocation */
 646         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 647                                                         HOST_MEM_BLOCK,
 648                                                         &priv->
 649                                                         device_host_address);
 650
 651         if (!priv->driver_mem_address) {
 652                 /* error allocating the block of PCI memory */
 653                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 654                        "prism54");
 655                 return -1;
 656         }
 657
 658         /* assign the Control Block to the first address of the allocated area */
 659         priv->control_block =
 660             (isl38xx_control_block *) priv->driver_mem_address;
 661
 662         /* set the Power Save Buffer pointer directly behind the CB */
 663         priv->device_psm_buffer =
 664                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 665
 666         /* make sure all buffer pointers are initialized */
 667         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 668                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 669                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 670         }
 671
 672         priv->index_mgmt_rx = 0;
 673         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 674         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 675
 676         /* allocate rx queue for management frames */
 677         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 678                 goto out_free;
 679
 680         /* now get the data rx skb's */
 681         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 682         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 683
 684         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 685                 struct sk_buff *skb;
 686
 687                 /* allocate an sk_buff for received data frames storage
 688                  * each frame on receive size consists of 1 fragment
 689                  * include any required allignment operations */
 690                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 691                         /* error allocating an sk_buff structure elements */
 692                         printk(KERN_ERR "Error allocating skb.\n");
 693                         skb = NULL;
 694                         goto out_free;
 695                 }
 696                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 697                 /* add the new allocated sk_buff to the buffer array */
 698                 priv->data_low_rx[counter] = skb;
 699
 700                 /* map the allocated skb data area to pci */
 701                 priv->pci_map_rx_address[counter] =
 702                     pci_map_single(priv->pdev, (void *) skb->data,
 703                                    MAX_FRAGMENT_SIZE_RX + 2,
 704                                    PCI_DMA_FROMDEVICE);
 705                 if (!priv->pci_map_rx_address[counter]) {
 706                         /* error mapping the buffer to device
 707                            accessable memory address */
 708                         printk(KERN_ERR "failed to map skb DMA'able\n");
 709                         goto out_free;
 710                 }
 711         }
 712
 713         prism54_acl_init(&priv->acl);
 714         prism54_wpa_bss_ie_init(priv);
 715         if (mgt_init(priv))
 716                 goto out_free;
 717
 718         return 0;
 719  out_free:
 720         islpci_free_memory(priv);
 721         return -1;
 722 }
 723
 724 int
 725 islpci_free_memory(islpci_private *priv)
 726 {
 727         int counter;
 728
 729         if (priv->device_base)
 730                 iounmap(priv->device_base);
 731         priv->device_base = NULL;
 732
 733         /* free consistent DMA area... */
 734         if (priv->driver_mem_address)
 735                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 736                                     priv->driver_mem_address,
 737                                     priv->device_host_address);
 738
 739         /* clear some dangling pointers */
 740         priv->driver_mem_address = NULL;
 741         priv->device_host_address = 0;
 742         priv->device_psm_buffer = 0;
 743         priv->control_block = NULL;
 744
 745         /* clean up mgmt rx buffers */
 746         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 747                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 748                 if (buf->pci_addr)
 749                         pci_unmap_single(priv->pdev, buf->pci_addr,
 750                                          buf->size, PCI_DMA_FROMDEVICE);
 751                 buf->pci_addr = 0;
 752                 kfree(buf->mem);
 753                 buf->size = 0;
 754                 buf->mem = NULL;
 755         }
 756
 757         /* clean up data rx buffers */
 758         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 759                 if (priv->pci_map_rx_address[counter])
 760                         pci_unmap_single(priv->pdev,
 761                                          priv->pci_map_rx_address[counter],
 762                                          MAX_FRAGMENT_SIZE_RX + 2,
 763                                          PCI_DMA_FROMDEVICE);
 764                 priv->pci_map_rx_address[counter] = 0;
 765
 766                 if (priv->data_low_rx[counter])
 767                         dev_kfree_skb(priv->data_low_rx[counter]);
 768                 priv->data_low_rx[counter] = NULL;
 769         }
 770
 771         /* Free the acces control list and the WPA list */
 772         prism54_acl_clean(&priv->acl);
 773         prism54_wpa_bss_ie_clean(priv);
 774         mgt_clean(priv);
 775
 776         return 0;
 777 }
 778
 779 #if 0
 780 static void
 781 islpci_set_multicast_list(struct net_device *dev)
 782 {
 783         /* put device into promisc mode and let network layer handle it */
 784 }
 785 #endif
 786
 787 static void islpci_ethtool_get_drvinfo(struct net_device *dev,
 788                                        struct ethtool_drvinfo *info)
 789 {
 790         strcpy(info->driver, DRV_NAME);
 791         strcpy(info->version, DRV_VERSION);
 792 }
 793
 794 static const struct ethtool_ops islpci_ethtool_ops = {
 795         .get_drvinfo = islpci_ethtool_get_drvinfo,
 796 };
 797
 798 static const struct net_device_ops islpci_netdev_ops = {
 799         .ndo_open               = islpci_open,
 800         .ndo_stop               = islpci_close,
 801         .ndo_do_ioctl           = prism54_ioctl,
 802         .ndo_start_xmit         = islpci_eth_transmit,
 803         .ndo_tx_timeout         = islpci_eth_tx_timeout,
 804         .ndo_set_mac_address    = prism54_set_mac_address,
 805         .ndo_change_mtu         = eth_change_mtu,
 806         .ndo_validate_addr      = eth_validate_addr,
 807 };
 808
 809 struct net_device *
 810 islpci_setup(struct pci_dev *pdev)
 811 {
 812         islpci_private *priv;
 813         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 814
 815         if (!ndev)
 816                 return ndev;
 817
 818         pci_set_drvdata(pdev, ndev);
 819 #if defined(SET_NETDEV_DEV)
 820         SET_NETDEV_DEV(ndev, &pdev->dev);
 821 #endif
 822
 823         /* setup the structure members */
 824         ndev->base_addr = pci_resource_start(pdev, 0);
 825         ndev->irq = pdev->irq;
 826
 827         /* initialize the function pointers */
 828         ndev->netdev_ops = &islpci_netdev_ops;
 829         ndev->wireless_handlers = &prism54_handler_def;
 830         ndev->ethtool_ops = &islpci_ethtool_ops;
 831
 832         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 833         ndev->addr_len = ETH_ALEN;
 834         /* Get a non-zero dummy MAC address for nameif. Jean II */
 835         memcpy(ndev->dev_addr, dummy_mac, 6);
 836
 837         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 838
 839         /* allocate a private device structure to the network device  */
 840         priv = netdev_priv(ndev);
 841         priv->ndev = ndev;
 842         priv->pdev = pdev;
 843         priv->monitor_type = ARPHRD_IEEE80211;
 844         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 845                 priv->monitor_type : ARPHRD_ETHER;
 846
 847         /* Add pointers to enable iwspy support. */
 848         priv->wireless_data.spy_data = &priv->spy_data;
 849         ndev->wireless_data = &priv->wireless_data;
 850
 851         /* save the start and end address of the PCI memory area */
 852         ndev->mem_start = (unsigned long) priv->device_base;
 853         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 854
 855 #if VERBOSE > SHOW_ERROR_MESSAGES
 856         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 857 #endif
 858
 859         init_waitqueue_head(&priv->reset_done);
 860
 861         /* init the queue read locks, process wait counter */
 862         mutex_init(&priv->mgmt_lock);
 863         priv->mgmt_received = NULL;
 864         init_waitqueue_head(&priv->mgmt_wqueue);
 865         mutex_init(&priv->stats_lock);
 866         spin_lock_init(&priv->slock);
 867
 868         /* init state machine with off#1 state */
 869         priv->state = PRV_STATE_OFF;
 870         priv->state_off = 1;
 871
 872         /* initialize workqueue's */
 873         INIT_WORK(&priv->stats_work, prism54_update_stats);
 874         priv->stats_timestamp = 0;
 875
 876         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
 877         priv->reset_task_pending = 0;
 878
 879         /* allocate various memory areas */
 880         if (islpci_alloc_memory(priv))
 881                 goto do_free_netdev;
 882
 883         /* select the firmware file depending on the device id */
 884         switch (pdev->device) {
 885         case 0x3877:
 886                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 887                 break;
 888
 889         case 0x3886:
 890                 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 891                 break;
 892
 893         default:
 894                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 895                 break;
 896         }
 897
 898         if (register_netdev(ndev)) {
 899                 DEBUG(SHOW_ERROR_MESSAGES,
 900                       "ERROR: register_netdev() failed \n");
 901                 goto do_islpci_free_memory;
 902         }
 903
 904         return ndev;
 905
 906       do_islpci_free_memory:
 907         islpci_free_memory(priv);
 908       do_free_netdev:
 909         pci_set_drvdata(pdev, NULL);
 910         free_netdev(ndev);
 911         priv = NULL;
 912         return NULL;
 913 }
 914
 915 islpci_state_t
 916 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 917 {
 918         islpci_state_t old_state;
 919
 920         /* lock */
 921         old_state = priv->state;
 922
 923         /* this means either a race condition or some serious error in
 924          * the driver code */
 925         switch (new_state) {
 926         case PRV_STATE_OFF:
 927                 priv->state_off++;
 928         default:
 929                 priv->state = new_state;
 930                 break;
 931
 932         case PRV_STATE_PREBOOT:
 933                 /* there are actually many off-states, enumerated by
 934                  * state_off */
 935                 if (old_state == PRV_STATE_OFF)
 936                         priv->state_off--;
 937
 938                 /* only if hw_unavailable is zero now it means we either
 939                  * were in off#1 state, or came here from
 940                  * somewhere else */
 941                 if (!priv->state_off)
 942                         priv->state = new_state;
 943                 break;
 944         };
 945 #if 0
 946         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 947                priv->ndev->name, old_state, new_state, priv->state_off);
 948 #endif
 949
 950         /* invariants */
 951         BUG_ON(priv->state_off < 0);
 952         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 953         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 954
 955         /* unlock */
 956         return old_state;
 957 }