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 "prismcompat.h"
  34 #include "isl_38xx.h"
  35 #include "isl_ioctl.h"
  36 #include "islpci_dev.h"
  37 #include "islpci_mgt.h"
  38 #include "islpci_eth.h"
  39 #include "oid_mgt.h"
  40
  41 #define ISL3877_IMAGE_FILE      "isl3877"
  42 #define ISL3886_IMAGE_FILE      "isl3886"
  43 #define ISL3890_IMAGE_FILE      "isl3890"
  44
  45 static int prism54_bring_down(islpci_private *);
  46 static int islpci_alloc_memory(islpci_private *);
  47
  48 /* Temporary dummy MAC address to use until firmware is loaded.
  49  * The idea there is that some tools (such as nameif) may query
  50  * the MAC address before the netdev is 'open'. By using a valid
  51  * OUI prefix, they can process the netdev properly.
  52  * Of course, this is not the final/real MAC address. It doesn't
  53  * matter, as you are suppose to be able to change it anytime via
  54  * ndev->set_mac_address. Jean II */
  55 const unsigned char     dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  56
  57 static int
  58 isl_upload_firmware(islpci_private *priv)
  59 {
  60         u32 reg, rc;
  61         void *device_base = priv->device_base;
  62
  63         /* clear the RAMBoot and the Reset bit */
  64         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  65         reg &= ~ISL38XX_CTRL_STAT_RESET;
  66         reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  67         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  68         wmb();
  69         udelay(ISL38XX_WRITEIO_DELAY);
  70
  71         /* set the Reset bit without reading the register ! */
  72         reg |= ISL38XX_CTRL_STAT_RESET;
  73         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  74         wmb();
  75         udelay(ISL38XX_WRITEIO_DELAY);
  76
  77         /* clear the Reset bit */
  78         reg &= ~ISL38XX_CTRL_STAT_RESET;
  79         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  80         wmb();
  81
  82         /* wait a while for the device to reboot */
  83         mdelay(50);
  84
  85         {
  86                 const struct firmware *fw_entry = NULL;
  87                 long fw_len;
  88                 const u32 *fw_ptr;
  89
  90                 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  91                 if (rc) {
  92                         printk(KERN_ERR
  93                                "%s: request_firmware() failed for '%s'\n",
  94                                "prism54", priv->firmware);
  95                         return rc;
  96                 }
  97                 /* prepare the Direct Memory Base register */
  98                 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
  99
 100                 fw_ptr = (u32 *) fw_entry->data;
 101                 fw_len = fw_entry->size;
 102
 103                 if (fw_len % 4) {
 104                         printk(KERN_ERR
 105                                "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
 106                                "prism54", priv->firmware);
 107                         release_firmware(fw_entry);
 108                         return EILSEQ; /* Illegal byte sequence  */;
 109                 }
 110
 111                 while (fw_len > 0) {
 112                         long _fw_len =
 113                             (fw_len >
 114                              ISL38XX_MEMORY_WINDOW_SIZE) ?
 115                             ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 116                         u32 *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 117
 118                         /* set the cards base address for writting the data */
 119                         isl38xx_w32_flush(device_base, reg,
 120                                           ISL38XX_DIR_MEM_BASE_REG);
 121                         wmb();  /* be paranoid */
 122
 123                         /* increment the write address for next iteration */
 124                         reg += _fw_len;
 125                         fw_len -= _fw_len;
 126
 127                         /* write the data to the Direct Memory Window 32bit-wise */
 128                         /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 129                         while (_fw_len > 0) {
 130                                 /* use non-swapping writel() */
 131                                 __raw_writel(*fw_ptr, dev_fw_ptr);
 132                                 fw_ptr++, dev_fw_ptr++;
 133                                 _fw_len -= 4;
 134                         }
 135
 136                         /* flush PCI posting */
 137                         (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 138                         wmb();  /* be paranoid again */
 139
 140                         BUG_ON(_fw_len != 0);
 141                 }
 142
 143                 BUG_ON(fw_len != 0);
 144
 145                 release_firmware(fw_entry);
 146         }
 147
 148         /* now reset the device
 149          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 150         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 151         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 152         reg &= ~ISL38XX_CTRL_STAT_RESET;
 153         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 154         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 155         wmb();
 156         udelay(ISL38XX_WRITEIO_DELAY);
 157
 158         /* set the reset bit latches the host override and RAMBoot bits
 159          * into the device for operation when the reset bit is reset */
 160         reg |= ISL38XX_CTRL_STAT_RESET;
 161         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 162         /* don't do flush PCI posting here! */
 163         wmb();
 164         udelay(ISL38XX_WRITEIO_DELAY);
 165
 166         /* clear the reset bit should start the whole circus */
 167         reg &= ~ISL38XX_CTRL_STAT_RESET;
 168         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 169         /* don't do flush PCI posting here! */
 170         wmb();
 171         udelay(ISL38XX_WRITEIO_DELAY);
 172
 173         return 0;
 174 }
 175
 176 /******************************************************************************
 177     Device Interrupt Handler
 178 ******************************************************************************/
 179
 180 irqreturn_t
 181 islpci_interrupt(int irq, void *config, struct pt_regs *regs)
 182 {
 183         u32 reg;
 184         islpci_private *priv = config;
 185         struct net_device *ndev = priv->ndev;
 186         void *device = priv->device_base;
 187         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 188
 189         /* lock the interrupt handler */
 190         spin_lock(&priv->slock);
 191
 192         /* received an interrupt request on a shared IRQ line
 193          * first check whether the device is in sleep mode */
 194         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 195         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 196                 /* device is in sleep mode, IRQ was generated by someone else */
 197         {
 198 #if VERBOSE > SHOW_ERROR_MESSAGES
 199                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 200 #endif
 201                 spin_unlock(&priv->slock);
 202                 return IRQ_NONE;
 203         }
 204
 205
 206         /* check whether there is any source of interrupt on the device */
 207         reg = readl(device + ISL38XX_INT_IDENT_REG);
 208
 209         /* also check the contents of the Interrupt Enable Register, because this
 210          * will filter out interrupt sources from other devices on the same irq ! */
 211         reg &= readl(device + ISL38XX_INT_EN_REG);
 212         reg &= ISL38XX_INT_SOURCES;
 213
 214         if (reg != 0) {
 215                 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 216                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 217
 218                 /* reset the request bits in the Identification register */
 219                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 220
 221 #if VERBOSE > SHOW_ERROR_MESSAGES
 222                 DEBUG(SHOW_FUNCTION_CALLS,
 223                       "IRQ: Identification register 0x%p 0x%x \n", device, reg);
 224 #endif
 225
 226                 /* check for each bit in the register separately */
 227                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 228 #if VERBOSE > SHOW_ERROR_MESSAGES
 229                         /* Queue has been updated */
 230                         DEBUG(SHOW_TRACING, "IRQ: Update flag \n");
 231
 232                         DEBUG(SHOW_QUEUE_INDEXES,
 233                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 234                               le32_to_cpu(priv->control_block->
 235                                           driver_curr_frag[0]),
 236                               le32_to_cpu(priv->control_block->
 237                                           driver_curr_frag[1]),
 238                               le32_to_cpu(priv->control_block->
 239                                           driver_curr_frag[2]),
 240                               le32_to_cpu(priv->control_block->
 241                                           driver_curr_frag[3]),
 242                               le32_to_cpu(priv->control_block->
 243                                           driver_curr_frag[4]),
 244                               le32_to_cpu(priv->control_block->
 245                                           driver_curr_frag[5])
 246                             );
 247
 248                         DEBUG(SHOW_QUEUE_INDEXES,
 249                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 250                               le32_to_cpu(priv->control_block->
 251                                           device_curr_frag[0]),
 252                               le32_to_cpu(priv->control_block->
 253                                           device_curr_frag[1]),
 254                               le32_to_cpu(priv->control_block->
 255                                           device_curr_frag[2]),
 256                               le32_to_cpu(priv->control_block->
 257                                           device_curr_frag[3]),
 258                               le32_to_cpu(priv->control_block->
 259                                           device_curr_frag[4]),
 260                               le32_to_cpu(priv->control_block->
 261                                           device_curr_frag[5])
 262                             );
 263 #endif
 264
 265                         /* cleanup the data low transmit queue */
 266                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 267
 268                         /* device is in active state, update the
 269                          * powerstate flag if necessary */
 270                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 271
 272                         /* check all three queues in priority order
 273                          * call the PIMFOR receive function until the
 274                          * queue is empty */
 275                         if (isl38xx_in_queue(priv->control_block,
 276                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 277 #if VERBOSE > SHOW_ERROR_MESSAGES
 278                                 DEBUG(SHOW_TRACING,
 279                                       "Received frame in Management Queue\n");
 280 #endif
 281                                 islpci_mgt_receive(ndev);
 282
 283                                 islpci_mgt_cleanup_transmit(ndev);
 284
 285                                 /* Refill slots in receive queue */
 286                                 islpci_mgmt_rx_fill(ndev);
 287
 288                                 /* no need to trigger the device, next
 289                                    islpci_mgt_transaction does it */
 290                         }
 291
 292                         while (isl38xx_in_queue(priv->control_block,
 293                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 294 #if VERBOSE > SHOW_ERROR_MESSAGES
 295                                 DEBUG(SHOW_TRACING,
 296                                       "Received frame in Data Low Queue \n");
 297 #endif
 298                                 islpci_eth_receive(priv);
 299                         }
 300
 301                         /* check whether the data transmit queues were full */
 302                         if (priv->data_low_tx_full) {
 303                                 /* check whether the transmit is not full anymore */
 304                                 if (ISL38XX_CB_TX_QSIZE -
 305                                     isl38xx_in_queue(priv->control_block,
 306                                                      ISL38XX_CB_TX_DATA_LQ) >=
 307                                     ISL38XX_MIN_QTHRESHOLD) {
 308                                         /* nope, the driver is ready for more network frames */
 309                                         netif_wake_queue(priv->ndev);
 310
 311                                         /* reset the full flag */
 312                                         priv->data_low_tx_full = 0;
 313                                 }
 314                         }
 315                 }
 316
 317                 if (reg & ISL38XX_INT_IDENT_INIT) {
 318                         /* Device has been initialized */
 319 #if VERBOSE > SHOW_ERROR_MESSAGES
 320                         DEBUG(SHOW_TRACING,
 321                               "IRQ: Init flag, device initialized \n");
 322 #endif
 323                         wake_up(&priv->reset_done);
 324                 }
 325
 326                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 327                         /* Device intends to move to powersave state */
 328 #if VERBOSE > SHOW_ERROR_MESSAGES
 329                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n");
 330 #endif
 331                         isl38xx_handle_sleep_request(priv->control_block,
 332                                                      &powerstate,
 333                                                      priv->device_base);
 334                 }
 335
 336                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 337                         /* Device has been woken up to active state */
 338 #if VERBOSE > SHOW_ERROR_MESSAGES
 339                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n");
 340 #endif
 341
 342                         isl38xx_handle_wakeup(priv->control_block,
 343                                               &powerstate, priv->device_base);
 344                 }
 345         } else {
 346 #if VERBOSE > SHOW_ERROR_MESSAGES
 347                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 348 #endif
 349                 spin_unlock(&priv->slock);
 350                 return IRQ_NONE;
 351         }
 352
 353         /* sleep -> ready */
 354         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 355             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 356                 islpci_set_state(priv, PRV_STATE_READY);
 357
 358         /* !sleep -> sleep */
 359         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 360             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 361                 islpci_set_state(priv, PRV_STATE_SLEEP);
 362
 363         /* unlock the interrupt handler */
 364         spin_unlock(&priv->slock);
 365
 366         return IRQ_HANDLED;
 367 }
 368
 369 /******************************************************************************
 370     Network Interface Control & Statistical functions
 371 ******************************************************************************/
 372 static int
 373 islpci_open(struct net_device *ndev)
 374 {
 375         u32 rc;
 376         islpci_private *priv = netdev_priv(ndev);
 377
 378         printk(KERN_DEBUG "%s: islpci_open()\n", ndev->name);
 379
 380         /* reset data structures, upload firmware and reset device */
 381         rc = islpci_reset(priv,1);
 382         if (rc) {
 383                 prism54_bring_down(priv);
 384                 return rc; /* Returns informative message */
 385         }
 386
 387         netif_start_queue(ndev);
 388 /*      netif_mark_up( ndev ); */
 389
 390         return 0;
 391 }
 392
 393 static int
 394 islpci_close(struct net_device *ndev)
 395 {
 396         islpci_private *priv = netdev_priv(ndev);
 397
 398         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 399
 400         netif_stop_queue(ndev);
 401
 402         return prism54_bring_down(priv);
 403 }
 404
 405 static int
 406 prism54_bring_down(islpci_private *priv)
 407 {
 408         void *device_base = priv->device_base;
 409         u32 reg;
 410         /* we are going to shutdown the device */
 411         islpci_set_state(priv, PRV_STATE_PREBOOT);
 412
 413         /* disable all device interrupts in case they weren't */
 414         isl38xx_disable_interrupts(priv->device_base);
 415
 416         /* For safety reasons, we may want to ensure that no DMA transfer is
 417          * currently in progress by emptying the TX and RX queues. */
 418
 419         /* wait until interrupts have finished executing on other CPUs */
 420         prism54_synchronize_irq(priv->pdev->irq);
 421
 422         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 423         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 424         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 425         wmb();
 426         udelay(ISL38XX_WRITEIO_DELAY);
 427
 428         reg |= ISL38XX_CTRL_STAT_RESET;
 429         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 430         wmb();
 431         udelay(ISL38XX_WRITEIO_DELAY);
 432
 433         /* clear the Reset bit */
 434         reg &= ~ISL38XX_CTRL_STAT_RESET;
 435         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 436         wmb();
 437
 438         /* wait a while for the device to reset */
 439         set_current_state(TASK_UNINTERRUPTIBLE);
 440         schedule_timeout(50*HZ/1000);
 441
 442         return 0;
 443 }
 444
 445 static int
 446 islpci_upload_fw(islpci_private *priv)
 447 {
 448         islpci_state_t old_state;
 449         u32 rc;
 450
 451         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 452
 453         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 454
 455         rc = isl_upload_firmware(priv);
 456         if (rc) {
 457                 /* error uploading the firmware */
 458                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 459                        priv->ndev->name, priv->firmware);
 460
 461                 islpci_set_state(priv, old_state);
 462                 return rc;
 463         }
 464
 465         printk(KERN_DEBUG
 466                "%s: firmware uploaded done, now triggering reset...\n",
 467                priv->ndev->name);
 468
 469         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 470
 471         return 0;
 472 }
 473
 474 static int
 475 islpci_reset_if(islpci_private *priv)
 476 {
 477         long remaining;
 478         int result = -ETIME;
 479         int count;
 480
 481         DEFINE_WAIT(wait);
 482         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 483
 484         /* now the last step is to reset the interface */
 485         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 486         islpci_set_state(priv, PRV_STATE_PREINIT);
 487
 488         for(count = 0; count < 2 && result; count++) {
 489                 /* The software reset acknowledge needs about 220 msec here.
 490                  * Be conservative and wait for up to one second. */
 491
 492                 remaining = schedule_timeout(HZ);
 493
 494                 if(remaining > 0) {
 495                         result = 0;
 496                         break;
 497                 }
 498
 499                 /* If we're here it's because our IRQ hasn't yet gone through.
 500                  * Retry a bit more...
 501                  */
 502                  printk(KERN_ERR "%s: device soft reset timed out\n",
 503                        priv->ndev->name);
 504
 505         }
 506
 507         finish_wait(&priv->reset_done, &wait);
 508
 509         if(result)
 510                 return result;
 511
 512         islpci_set_state(priv, PRV_STATE_INIT);
 513
 514         /* Now that the device is 100% up, let's allow
 515          * for the other interrupts --
 516          * NOTE: this is not *yet* true since we've only allowed the
 517          * INIT interrupt on the IRQ line. We can perhaps poll
 518          * the IRQ line until we know for sure the reset went through */
 519         isl38xx_enable_common_interrupts(priv->device_base);
 520
 521         down_write(&priv->mib_sem);
 522         mgt_commit(priv);
 523         up_write(&priv->mib_sem);
 524
 525         islpci_set_state(priv, PRV_STATE_READY);
 526
 527         return 0;
 528 }
 529
 530 int
 531 islpci_reset(islpci_private *priv, int reload_firmware)
 532 {
 533         isl38xx_control_block *cb =    /* volatile not needed */
 534                 (isl38xx_control_block *) priv->control_block;
 535         unsigned counter;
 536         int rc;
 537
 538         if (reload_firmware)
 539                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 540         else
 541                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 542
 543         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 544
 545         /* disable all device interrupts in case they weren't */
 546         isl38xx_disable_interrupts(priv->device_base);
 547
 548         /* flush all management queues */
 549         priv->index_mgmt_tx = 0;
 550         priv->index_mgmt_rx = 0;
 551
 552         /* clear the indexes in the frame pointer */
 553         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 554                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 555                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 556         }
 557
 558         /* reset the mgmt receive queue */
 559         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 560                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 561                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 562                 frag->flags = 0;
 563                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 564         }
 565
 566         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 567                 cb->rx_data_low[counter].address =
 568                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 569         }
 570
 571         /* since the receive queues are filled with empty fragments, now we can
 572          * set the corresponding indexes in the Control Block */
 573         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 574             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 575         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 576             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 577
 578         /* reset the remaining real index registers and full flags */
 579         priv->free_data_rx = 0;
 580         priv->free_data_tx = 0;
 581         priv->data_low_tx_full = 0;
 582
 583         if (reload_firmware) { /* Should we load the firmware ? */
 584         /* now that the data structures are cleaned up, upload
 585          * firmware and reset interface */
 586                 rc = islpci_upload_fw(priv);
 587                 if (rc)
 588                         return rc;
 589         }
 590
 591         /* finally reset interface */
 592         rc = islpci_reset_if(priv);
 593         if (!rc) /* If successful */
 594                 return rc;
 595
 596         printk(KERN_DEBUG  "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 597         return rc;
 598
 599 }
 600
 601 struct net_device_stats *
 602 islpci_statistics(struct net_device *ndev)
 603 {
 604         islpci_private *priv = netdev_priv(ndev);
 605
 606 #if VERBOSE > SHOW_ERROR_MESSAGES
 607         DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics \n");
 608 #endif
 609
 610         return &priv->statistics;
 611 }
 612
 613 /******************************************************************************
 614     Network device configuration functions
 615 ******************************************************************************/
 616 static int
 617 islpci_alloc_memory(islpci_private *priv)
 618 {
 619         int counter;
 620
 621 #if VERBOSE > SHOW_ERROR_MESSAGES
 622         printk(KERN_DEBUG "islpci_alloc_memory\n");
 623 #endif
 624
 625         /* remap the PCI device base address to accessable */
 626         if (!(priv->device_base =
 627               ioremap(pci_resource_start(priv->pdev, 0),
 628                       ISL38XX_PCI_MEM_SIZE))) {
 629                 /* error in remapping the PCI device memory address range */
 630                 printk(KERN_ERR "PCI memory remapping failed \n");
 631                 return -1;
 632         }
 633
 634         /* memory layout for consistent DMA region:
 635          *
 636          * Area 1: Control Block for the device interface
 637          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 638          *         the number of supported stations in the AP determines the minimal
 639          *         size of the buffer !
 640          */
 641
 642         /* perform the allocation */
 643         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 644                                                         HOST_MEM_BLOCK,
 645                                                         &priv->
 646                                                         device_host_address);
 647
 648         if (!priv->driver_mem_address) {
 649                 /* error allocating the block of PCI memory */
 650                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 651                        "prism54");
 652                 return -1;
 653         }
 654
 655         /* assign the Control Block to the first address of the allocated area */
 656         priv->control_block =
 657             (isl38xx_control_block *) priv->driver_mem_address;
 658
 659         /* set the Power Save Buffer pointer directly behind the CB */
 660         priv->device_psm_buffer =
 661                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 662
 663         /* make sure all buffer pointers are initialized */
 664         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 665                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 666                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 667         }
 668
 669         priv->index_mgmt_rx = 0;
 670         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 671         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 672
 673         /* allocate rx queue for management frames */
 674         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 675                 goto out_free;
 676
 677         /* now get the data rx skb's */
 678         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 679         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 680
 681         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 682                 struct sk_buff *skb;
 683
 684                 /* allocate an sk_buff for received data frames storage
 685                  * each frame on receive size consists of 1 fragment
 686                  * include any required allignment operations */
 687                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 688                         /* error allocating an sk_buff structure elements */
 689                         printk(KERN_ERR "Error allocating skb.\n");
 690                         skb = NULL;
 691                         goto out_free;
 692                 }
 693                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 694                 /* add the new allocated sk_buff to the buffer array */
 695                 priv->data_low_rx[counter] = skb;
 696
 697                 /* map the allocated skb data area to pci */
 698                 priv->pci_map_rx_address[counter] =
 699                     pci_map_single(priv->pdev, (void *) skb->data,
 700                                    MAX_FRAGMENT_SIZE_RX + 2,
 701                                    PCI_DMA_FROMDEVICE);
 702                 if (!priv->pci_map_rx_address[counter]) {
 703                         /* error mapping the buffer to device
 704                            accessable memory address */
 705                         printk(KERN_ERR "failed to map skb DMA'able\n");
 706                         goto out_free;
 707                 }
 708         }
 709
 710         prism54_acl_init(&priv->acl);
 711         prism54_wpa_ie_init(priv);
 712         if (mgt_init(priv))
 713                 goto out_free;
 714
 715         return 0;
 716  out_free:
 717         islpci_free_memory(priv);
 718         return -1;
 719 }
 720
 721 int
 722 islpci_free_memory(islpci_private *priv)
 723 {
 724         int counter;
 725
 726         if (priv->device_base)
 727                 iounmap(priv->device_base);
 728         priv->device_base = NULL;
 729
 730         /* free consistent DMA area... */
 731         if (priv->driver_mem_address)
 732                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 733                                     priv->driver_mem_address,
 734                                     priv->device_host_address);
 735
 736         /* clear some dangling pointers */
 737         priv->driver_mem_address = NULL;
 738         priv->device_host_address = 0;
 739         priv->device_psm_buffer = 0;
 740         priv->control_block = NULL;
 741
 742         /* clean up mgmt rx buffers */
 743         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 744                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 745                 if (buf->pci_addr)
 746                         pci_unmap_single(priv->pdev, buf->pci_addr,
 747                                          buf->size, PCI_DMA_FROMDEVICE);
 748                 buf->pci_addr = 0;
 749                 if (buf->mem)
 750                         kfree(buf->mem);
 751                 buf->size = 0;
 752                 buf->mem = NULL;
 753         }
 754
 755         /* clean up data rx buffers */
 756         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 757                 if (priv->pci_map_rx_address[counter])
 758                         pci_unmap_single(priv->pdev,
 759                                          priv->pci_map_rx_address[counter],
 760                                          MAX_FRAGMENT_SIZE_RX + 2,
 761                                          PCI_DMA_FROMDEVICE);
 762                 priv->pci_map_rx_address[counter] = 0;
 763
 764                 if (priv->data_low_rx[counter])
 765                         dev_kfree_skb(priv->data_low_rx[counter]);
 766                 priv->data_low_rx[counter] = NULL;
 767         }
 768
 769         /* Free the acces control list and the WPA list */
 770         prism54_acl_clean(&priv->acl);
 771         prism54_wpa_ie_clean(priv);
 772         mgt_clean(priv);
 773
 774         return 0;
 775 }
 776
 777 #if 0
 778 static void
 779 islpci_set_multicast_list(struct net_device *dev)
 780 {
 781         /* put device into promisc mode and let network layer handle it */
 782 }
 783 #endif
 784
 785 struct net_device *
 786 islpci_setup(struct pci_dev *pdev)
 787 {
 788         islpci_private *priv;
 789         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 790
 791         if (!ndev)
 792                 return ndev;
 793
 794         SET_MODULE_OWNER(ndev);
 795         pci_set_drvdata(pdev, ndev);
 796 #if defined(SET_NETDEV_DEV)
 797         SET_NETDEV_DEV(ndev, &pdev->dev);
 798 #endif
 799
 800         /* setup the structure members */
 801         ndev->base_addr = pci_resource_start(pdev, 0);
 802         ndev->irq = pdev->irq;
 803
 804         /* initialize the function pointers */
 805         ndev->open = &islpci_open;
 806         ndev->stop = &islpci_close;
 807         ndev->get_stats = &islpci_statistics;
 808         ndev->get_wireless_stats = &prism54_get_wireless_stats;
 809         ndev->do_ioctl = &prism54_ioctl;
 810         ndev->wireless_handlers =
 811             (struct iw_handler_def *) &prism54_handler_def;
 812
 813         ndev->hard_start_xmit = &islpci_eth_transmit;
 814         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 815         ndev->addr_len = ETH_ALEN;
 816         ndev->set_mac_address = &prism54_set_mac_address;
 817         /* Get a non-zero dummy MAC address for nameif. Jean II */
 818         memcpy(ndev->dev_addr, dummy_mac, 6);
 819
 820 #ifdef HAVE_TX_TIMEOUT
 821         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 822         ndev->tx_timeout = &islpci_eth_tx_timeout;
 823 #endif
 824
 825         /* allocate a private device structure to the network device  */
 826         priv = netdev_priv(ndev);
 827         priv->ndev = ndev;
 828         priv->pdev = pdev;
 829         priv->monitor_type = ARPHRD_IEEE80211;
 830         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 831                 priv->monitor_type : ARPHRD_ETHER;
 832
 833         /* save the start and end address of the PCI memory area */
 834         ndev->mem_start = (unsigned long) priv->device_base;
 835         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 836
 837 #if VERBOSE > SHOW_ERROR_MESSAGES
 838         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 839 #endif
 840
 841         init_waitqueue_head(&priv->reset_done);
 842
 843         /* init the queue read locks, process wait counter */
 844         sema_init(&priv->mgmt_sem, 1);
 845         priv->mgmt_received = NULL;
 846         init_waitqueue_head(&priv->mgmt_wqueue);
 847         sema_init(&priv->stats_sem, 1);
 848         spin_lock_init(&priv->slock);
 849
 850         /* init state machine with off#1 state */
 851         priv->state = PRV_STATE_OFF;
 852         priv->state_off = 1;
 853
 854         /* initialize workqueue's */
 855         INIT_WORK(&priv->stats_work,
 856                   (void (*)(void *)) prism54_update_stats, priv);
 857         priv->stats_timestamp = 0;
 858
 859         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake, priv);
 860         priv->reset_task_pending = 0;
 861
 862         /* allocate various memory areas */
 863         if (islpci_alloc_memory(priv))
 864                 goto do_free_netdev;
 865
 866         /* select the firmware file depending on the device id */
 867         switch (pdev->device) {
 868         case 0x3877:
 869                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 870                 break;
 871
 872         case 0x3886:
 873                 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 874                 break;
 875
 876         default:
 877                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 878                 break;
 879         }
 880
 881         if (register_netdev(ndev)) {
 882                 DEBUG(SHOW_ERROR_MESSAGES,
 883                       "ERROR: register_netdev() failed \n");
 884                 goto do_islpci_free_memory;
 885         }
 886
 887         return ndev;
 888
 889       do_islpci_free_memory:
 890         islpci_free_memory(priv);
 891       do_free_netdev:
 892         pci_set_drvdata(pdev, NULL);
 893         free_netdev(ndev);
 894         priv = NULL;
 895         return NULL;
 896 }
 897
 898 islpci_state_t
 899 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 900 {
 901         islpci_state_t old_state;
 902
 903         /* lock */
 904         old_state = priv->state;
 905
 906         /* this means either a race condition or some serious error in
 907          * the driver code */
 908         switch (new_state) {
 909         case PRV_STATE_OFF:
 910                 priv->state_off++;
 911         default:
 912                 priv->state = new_state;
 913                 break;
 914
 915         case PRV_STATE_PREBOOT:
 916                 /* there are actually many off-states, enumerated by
 917                  * state_off */
 918                 if (old_state == PRV_STATE_OFF)
 919                         priv->state_off--;
 920
 921                 /* only if hw_unavailable is zero now it means we either
 922                  * were in off#1 state, or came here from
 923                  * somewhere else */
 924                 if (!priv->state_off)
 925                         priv->state = new_state;
 926                 break;
 927         };
 928 #if 0
 929         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 930                priv->ndev->name, old_state, new_state, priv->state_off);
 931 #endif
 932
 933         /* invariants */
 934         BUG_ON(priv->state_off < 0);
 935         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 936         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 937
 938         /* unlock */
 939         return old_state;
 940 }