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/sched.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 MODULE_FIRMWARE(ISL3877_IMAGE_FILE);
  45 MODULE_FIRMWARE(ISL3886_IMAGE_FILE);
  46 MODULE_FIRMWARE(ISL3890_IMAGE_FILE);
  47
  48 static int prism54_bring_down(islpci_private *);
  49 static int islpci_alloc_memory(islpci_private *);
  50
  51 /* Temporary dummy MAC address to use until firmware is loaded.
  52  * The idea there is that some tools (such as nameif) may query
  53  * the MAC address before the netdev is 'open'. By using a valid
  54  * OUI prefix, they can process the netdev properly.
  55  * Of course, this is not the final/real MAC address. It doesn't
  56  * matter, as you are suppose to be able to change it anytime via
  57  * ndev->set_mac_address. Jean II */
  58 static const unsigned char      dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  59
  60 static int
  61 isl_upload_firmware(islpci_private *priv)
  62 {
  63         u32 reg, rc;
  64         void __iomem *device_base = priv->device_base;
  65
  66         /* clear the RAMBoot and the Reset bit */
  67         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  68         reg &= ~ISL38XX_CTRL_STAT_RESET;
  69         reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  70         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  71         wmb();
  72         udelay(ISL38XX_WRITEIO_DELAY);
  73
  74         /* set the Reset bit without reading the register ! */
  75         reg |= ISL38XX_CTRL_STAT_RESET;
  76         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  77         wmb();
  78         udelay(ISL38XX_WRITEIO_DELAY);
  79
  80         /* clear the Reset bit */
  81         reg &= ~ISL38XX_CTRL_STAT_RESET;
  82         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  83         wmb();
  84
  85         /* wait a while for the device to reboot */
  86         mdelay(50);
  87
  88         {
  89                 const struct firmware *fw_entry = NULL;
  90                 long fw_len;
  91                 const u32 *fw_ptr;
  92
  93                 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  94                 if (rc) {
  95                         printk(KERN_ERR
  96                                "%s: request_firmware() failed for '%s'\n",
  97                                "prism54", priv->firmware);
  98                         return rc;
  99                 }
 100                 /* prepare the Direct Memory Base register */
 101                 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
 102
 103                 fw_ptr = (u32 *) fw_entry->data;
 104                 fw_len = fw_entry->size;
 105
 106                 if (fw_len % 4) {
 107                         printk(KERN_ERR
 108                                "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
 109                                "prism54", priv->firmware);
 110                         release_firmware(fw_entry);
 111                         return -EILSEQ; /* Illegal byte sequence  */;
 112                 }
 113
 114                 while (fw_len > 0) {
 115                         long _fw_len =
 116                             (fw_len >
 117                              ISL38XX_MEMORY_WINDOW_SIZE) ?
 118                             ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 119                         u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 120
 121                         /* set the card's base address for writing the data */
 122                         isl38xx_w32_flush(device_base, reg,
 123                                           ISL38XX_DIR_MEM_BASE_REG);
 124                         wmb();  /* be paranoid */
 125
 126                         /* increment the write address for next iteration */
 127                         reg += _fw_len;
 128                         fw_len -= _fw_len;
 129
 130                         /* write the data to the Direct Memory Window 32bit-wise */
 131                         /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 132                         while (_fw_len > 0) {
 133                                 /* use non-swapping writel() */
 134                                 __raw_writel(*fw_ptr, dev_fw_ptr);
 135                                 fw_ptr++, dev_fw_ptr++;
 136                                 _fw_len -= 4;
 137                         }
 138
 139                         /* flush PCI posting */
 140                         (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 141                         wmb();  /* be paranoid again */
 142
 143                         BUG_ON(_fw_len != 0);
 144                 }
 145
 146                 BUG_ON(fw_len != 0);
 147
 148                 /* Firmware version is at offset 40 (also for "newmac") */
 149                 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
 150                        priv->ndev->name, fw_entry->data + 40);
 151
 152                 release_firmware(fw_entry);
 153         }
 154
 155         /* now reset the device
 156          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 157         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 158         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 159         reg &= ~ISL38XX_CTRL_STAT_RESET;
 160         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 161         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 162         wmb();
 163         udelay(ISL38XX_WRITEIO_DELAY);
 164
 165         /* set the reset bit latches the host override and RAMBoot bits
 166          * into the device for operation when the reset bit is reset */
 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         /* clear the reset bit should start the whole circus */
 174         reg &= ~ISL38XX_CTRL_STAT_RESET;
 175         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 176         /* don't do flush PCI posting here! */
 177         wmb();
 178         udelay(ISL38XX_WRITEIO_DELAY);
 179
 180         return 0;
 181 }
 182
 183 /******************************************************************************
 184     Device Interrupt Handler
 185 ******************************************************************************/
 186
 187 irqreturn_t
 188 islpci_interrupt(int irq, void *config)
 189 {
 190         u32 reg;
 191         islpci_private *priv = config;
 192         struct net_device *ndev = priv->ndev;
 193         void __iomem *device = priv->device_base;
 194         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 195
 196         /* lock the interrupt handler */
 197         spin_lock(&priv->slock);
 198
 199         /* received an interrupt request on a shared IRQ line
 200          * first check whether the device is in sleep mode */
 201         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 202         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 203                 /* device is in sleep mode, IRQ was generated by someone else */
 204         {
 205 #if VERBOSE > SHOW_ERROR_MESSAGES
 206                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 207 #endif
 208                 spin_unlock(&priv->slock);
 209                 return IRQ_NONE;
 210         }
 211
 212
 213         /* check whether there is any source of interrupt on the device */
 214         reg = readl(device + ISL38XX_INT_IDENT_REG);
 215
 216         /* also check the contents of the Interrupt Enable Register, because this
 217          * will filter out interrupt sources from other devices on the same irq ! */
 218         reg &= readl(device + ISL38XX_INT_EN_REG);
 219         reg &= ISL38XX_INT_SOURCES;
 220
 221         if (reg != 0) {
 222                 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 223                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 224
 225                 /* reset the request bits in the Identification register */
 226                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 227
 228 #if VERBOSE > SHOW_ERROR_MESSAGES
 229                 DEBUG(SHOW_FUNCTION_CALLS,
 230                       "IRQ: Identification register 0x%p 0x%x\n", device, reg);
 231 #endif
 232
 233                 /* check for each bit in the register separately */
 234                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 235 #if VERBOSE > SHOW_ERROR_MESSAGES
 236                         /* Queue has been updated */
 237                         DEBUG(SHOW_TRACING, "IRQ: Update flag\n");
 238
 239                         DEBUG(SHOW_QUEUE_INDEXES,
 240                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 241                               le32_to_cpu(priv->control_block->
 242                                           driver_curr_frag[0]),
 243                               le32_to_cpu(priv->control_block->
 244                                           driver_curr_frag[1]),
 245                               le32_to_cpu(priv->control_block->
 246                                           driver_curr_frag[2]),
 247                               le32_to_cpu(priv->control_block->
 248                                           driver_curr_frag[3]),
 249                               le32_to_cpu(priv->control_block->
 250                                           driver_curr_frag[4]),
 251                               le32_to_cpu(priv->control_block->
 252                                           driver_curr_frag[5])
 253                             );
 254
 255                         DEBUG(SHOW_QUEUE_INDEXES,
 256                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 257                               le32_to_cpu(priv->control_block->
 258                                           device_curr_frag[0]),
 259                               le32_to_cpu(priv->control_block->
 260                                           device_curr_frag[1]),
 261                               le32_to_cpu(priv->control_block->
 262                                           device_curr_frag[2]),
 263                               le32_to_cpu(priv->control_block->
 264                                           device_curr_frag[3]),
 265                               le32_to_cpu(priv->control_block->
 266                                           device_curr_frag[4]),
 267                               le32_to_cpu(priv->control_block->
 268                                           device_curr_frag[5])
 269                             );
 270 #endif
 271
 272                         /* cleanup the data low transmit queue */
 273                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 274
 275                         /* device is in active state, update the
 276                          * powerstate flag if necessary */
 277                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 278
 279                         /* check all three queues in priority order
 280                          * call the PIMFOR receive function until the
 281                          * queue is empty */
 282                         if (isl38xx_in_queue(priv->control_block,
 283                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 284 #if VERBOSE > SHOW_ERROR_MESSAGES
 285                                 DEBUG(SHOW_TRACING,
 286                                       "Received frame in Management Queue\n");
 287 #endif
 288                                 islpci_mgt_receive(ndev);
 289
 290                                 islpci_mgt_cleanup_transmit(ndev);
 291
 292                                 /* Refill slots in receive queue */
 293                                 islpci_mgmt_rx_fill(ndev);
 294
 295                                 /* no need to trigger the device, next
 296                                    islpci_mgt_transaction does it */
 297                         }
 298
 299                         while (isl38xx_in_queue(priv->control_block,
 300                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 301 #if VERBOSE > SHOW_ERROR_MESSAGES
 302                                 DEBUG(SHOW_TRACING,
 303                                       "Received frame in Data Low Queue\n");
 304 #endif
 305                                 islpci_eth_receive(priv);
 306                         }
 307
 308                         /* check whether the data transmit queues were full */
 309                         if (priv->data_low_tx_full) {
 310                                 /* check whether the transmit is not full anymore */
 311                                 if (ISL38XX_CB_TX_QSIZE -
 312                                     isl38xx_in_queue(priv->control_block,
 313                                                      ISL38XX_CB_TX_DATA_LQ) >=
 314                                     ISL38XX_MIN_QTHRESHOLD) {
 315                                         /* nope, the driver is ready for more network frames */
 316                                         netif_wake_queue(priv->ndev);
 317
 318                                         /* reset the full flag */
 319                                         priv->data_low_tx_full = 0;
 320                                 }
 321                         }
 322                 }
 323
 324                 if (reg & ISL38XX_INT_IDENT_INIT) {
 325                         /* Device has been initialized */
 326 #if VERBOSE > SHOW_ERROR_MESSAGES
 327                         DEBUG(SHOW_TRACING,
 328                               "IRQ: Init flag, device initialized\n");
 329 #endif
 330                         wake_up(&priv->reset_done);
 331                 }
 332
 333                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 334                         /* Device intends to move to powersave state */
 335 #if VERBOSE > SHOW_ERROR_MESSAGES
 336                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag\n");
 337 #endif
 338                         isl38xx_handle_sleep_request(priv->control_block,
 339                                                      &powerstate,
 340                                                      priv->device_base);
 341                 }
 342
 343                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 344                         /* Device has been woken up to active state */
 345 #if VERBOSE > SHOW_ERROR_MESSAGES
 346                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag\n");
 347 #endif
 348
 349                         isl38xx_handle_wakeup(priv->control_block,
 350                                               &powerstate, priv->device_base);
 351                 }
 352         } else {
 353 #if VERBOSE > SHOW_ERROR_MESSAGES
 354                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 355 #endif
 356                 spin_unlock(&priv->slock);
 357                 return IRQ_NONE;
 358         }
 359
 360         /* sleep -> ready */
 361         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 362             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 363                 islpci_set_state(priv, PRV_STATE_READY);
 364
 365         /* !sleep -> sleep */
 366         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 367             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 368                 islpci_set_state(priv, PRV_STATE_SLEEP);
 369
 370         /* unlock the interrupt handler */
 371         spin_unlock(&priv->slock);
 372
 373         return IRQ_HANDLED;
 374 }
 375
 376 /******************************************************************************
 377     Network Interface Control & Statistical functions
 378 ******************************************************************************/
 379 static int
 380 islpci_open(struct net_device *ndev)
 381 {
 382         u32 rc;
 383         islpci_private *priv = netdev_priv(ndev);
 384
 385         /* reset data structures, upload firmware and reset device */
 386         rc = islpci_reset(priv,1);
 387         if (rc) {
 388                 prism54_bring_down(priv);
 389                 return rc; /* Returns informative message */
 390         }
 391
 392         netif_start_queue(ndev);
 393
 394         /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
 395          * once the firmware receives a trap of being associated
 396          * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
 397          * should just leave the carrier on as its expected the firmware
 398          * won't send us a trigger. */
 399         if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
 400                 netif_carrier_off(ndev);
 401         else
 402                 netif_carrier_on(ndev);
 403
 404         return 0;
 405 }
 406
 407 static int
 408 islpci_close(struct net_device *ndev)
 409 {
 410         islpci_private *priv = netdev_priv(ndev);
 411
 412         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 413
 414         netif_stop_queue(ndev);
 415
 416         return prism54_bring_down(priv);
 417 }
 418
 419 static int
 420 prism54_bring_down(islpci_private *priv)
 421 {
 422         void __iomem *device_base = priv->device_base;
 423         u32 reg;
 424         /* we are going to shutdown the device */
 425         islpci_set_state(priv, PRV_STATE_PREBOOT);
 426
 427         /* disable all device interrupts in case they weren't */
 428         isl38xx_disable_interrupts(priv->device_base);
 429
 430         /* For safety reasons, we may want to ensure that no DMA transfer is
 431          * currently in progress by emptying the TX and RX queues. */
 432
 433         /* wait until interrupts have finished executing on other CPUs */
 434         synchronize_irq(priv->pdev->irq);
 435
 436         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 437         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 438         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 439         wmb();
 440         udelay(ISL38XX_WRITEIO_DELAY);
 441
 442         reg |= ISL38XX_CTRL_STAT_RESET;
 443         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 444         wmb();
 445         udelay(ISL38XX_WRITEIO_DELAY);
 446
 447         /* clear the Reset bit */
 448         reg &= ~ISL38XX_CTRL_STAT_RESET;
 449         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 450         wmb();
 451
 452         /* wait a while for the device to reset */
 453         schedule_timeout_uninterruptible(msecs_to_jiffies(50));
 454
 455         return 0;
 456 }
 457
 458 static int
 459 islpci_upload_fw(islpci_private *priv)
 460 {
 461         islpci_state_t old_state;
 462         u32 rc;
 463
 464         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 465
 466         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 467
 468         rc = isl_upload_firmware(priv);
 469         if (rc) {
 470                 /* error uploading the firmware */
 471                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 472                        priv->ndev->name, priv->firmware);
 473
 474                 islpci_set_state(priv, old_state);
 475                 return rc;
 476         }
 477
 478         printk(KERN_DEBUG "%s: firmware upload complete\n",
 479                priv->ndev->name);
 480
 481         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 482
 483         return 0;
 484 }
 485
 486 static int
 487 islpci_reset_if(islpci_private *priv)
 488 {
 489         long remaining;
 490         int result = -ETIME;
 491         int count;
 492
 493         DEFINE_WAIT(wait);
 494         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 495
 496         /* now the last step is to reset the interface */
 497         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 498         islpci_set_state(priv, PRV_STATE_PREINIT);
 499
 500         for(count = 0; count < 2 && result; count++) {
 501                 /* The software reset acknowledge needs about 220 msec here.
 502                  * Be conservative and wait for up to one second. */
 503
 504                 remaining = schedule_timeout_uninterruptible(HZ);
 505
 506                 if(remaining > 0) {
 507                         result = 0;
 508                         break;
 509                 }
 510
 511                 /* If we're here it's because our IRQ hasn't yet gone through.
 512                  * Retry a bit more...
 513                  */
 514                 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
 515                         priv->ndev->name);
 516         }
 517
 518         finish_wait(&priv->reset_done, &wait);
 519
 520         if (result) {
 521                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 522                 return result;
 523         }
 524
 525         islpci_set_state(priv, PRV_STATE_INIT);
 526
 527         /* Now that the device is 100% up, let's allow
 528          * for the other interrupts --
 529          * NOTE: this is not *yet* true since we've only allowed the
 530          * INIT interrupt on the IRQ line. We can perhaps poll
 531          * the IRQ line until we know for sure the reset went through */
 532         isl38xx_enable_common_interrupts(priv->device_base);
 533
 534         down_write(&priv->mib_sem);
 535         result = mgt_commit(priv);
 536         if (result) {
 537                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 538                 up_write(&priv->mib_sem);
 539                 return result;
 540         }
 541         up_write(&priv->mib_sem);
 542
 543         islpci_set_state(priv, PRV_STATE_READY);
 544
 545         printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
 546         return 0;
 547 }
 548
 549 int
 550 islpci_reset(islpci_private *priv, int reload_firmware)
 551 {
 552         isl38xx_control_block *cb =    /* volatile not needed */
 553                 (isl38xx_control_block *) priv->control_block;
 554         unsigned counter;
 555         int rc;
 556
 557         if (reload_firmware)
 558                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 559         else
 560                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 561
 562         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 563
 564         /* disable all device interrupts in case they weren't */
 565         isl38xx_disable_interrupts(priv->device_base);
 566
 567         /* flush all management queues */
 568         priv->index_mgmt_tx = 0;
 569         priv->index_mgmt_rx = 0;
 570
 571         /* clear the indexes in the frame pointer */
 572         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 573                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 574                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 575         }
 576
 577         /* reset the mgmt receive queue */
 578         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 579                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 580                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 581                 frag->flags = 0;
 582                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 583         }
 584
 585         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 586                 cb->rx_data_low[counter].address =
 587                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 588         }
 589
 590         /* since the receive queues are filled with empty fragments, now we can
 591          * set the corresponding indexes in the Control Block */
 592         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 593             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 594         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 595             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 596
 597         /* reset the remaining real index registers and full flags */
 598         priv->free_data_rx = 0;
 599         priv->free_data_tx = 0;
 600         priv->data_low_tx_full = 0;
 601
 602         if (reload_firmware) { /* Should we load the firmware ? */
 603         /* now that the data structures are cleaned up, upload
 604          * firmware and reset interface */
 605                 rc = islpci_upload_fw(priv);
 606                 if (rc) {
 607                         printk(KERN_ERR "%s: islpci_reset: failure\n",
 608                                 priv->ndev->name);
 609                         return rc;
 610                 }
 611         }
 612
 613         /* finally reset interface */
 614         rc = islpci_reset_if(priv);
 615         if (rc)
 616                 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 617         return rc;
 618 }
 619
 620 /******************************************************************************
 621     Network device configuration functions
 622 ******************************************************************************/
 623 static int
 624 islpci_alloc_memory(islpci_private *priv)
 625 {
 626         int counter;
 627
 628 #if VERBOSE > SHOW_ERROR_MESSAGES
 629         printk(KERN_DEBUG "islpci_alloc_memory\n");
 630 #endif
 631
 632         /* remap the PCI device base address to accessable */
 633         if (!(priv->device_base =
 634               ioremap(pci_resource_start(priv->pdev, 0),
 635                       ISL38XX_PCI_MEM_SIZE))) {
 636                 /* error in remapping the PCI device memory address range */
 637                 printk(KERN_ERR "PCI memory remapping failed\n");
 638                 return -1;
 639         }
 640
 641         /* memory layout for consistent DMA region:
 642          *
 643          * Area 1: Control Block for the device interface
 644          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 645          *         the number of supported stations in the AP determines the minimal
 646          *         size of the buffer !
 647          */
 648
 649         /* perform the allocation */
 650         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 651                                                         HOST_MEM_BLOCK,
 652                                                         &priv->
 653                                                         device_host_address);
 654
 655         if (!priv->driver_mem_address) {
 656                 /* error allocating the block of PCI memory */
 657                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 658                        "prism54");
 659                 return -1;
 660         }
 661
 662         /* assign the Control Block to the first address of the allocated area */
 663         priv->control_block =
 664             (isl38xx_control_block *) priv->driver_mem_address;
 665
 666         /* set the Power Save Buffer pointer directly behind the CB */
 667         priv->device_psm_buffer =
 668                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 669
 670         /* make sure all buffer pointers are initialized */
 671         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 672                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 673                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 674         }
 675
 676         priv->index_mgmt_rx = 0;
 677         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 678         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 679
 680         /* allocate rx queue for management frames */
 681         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 682                 goto out_free;
 683
 684         /* now get the data rx skb's */
 685         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 686         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 687
 688         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 689                 struct sk_buff *skb;
 690
 691                 /* allocate an sk_buff for received data frames storage
 692                  * each frame on receive size consists of 1 fragment
 693                  * include any required allignment operations */
 694                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 695                         /* error allocating an sk_buff structure elements */
 696                         printk(KERN_ERR "Error allocating skb.\n");
 697                         skb = NULL;
 698                         goto out_free;
 699                 }
 700                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 701                 /* add the new allocated sk_buff to the buffer array */
 702                 priv->data_low_rx[counter] = skb;
 703
 704                 /* map the allocated skb data area to pci */
 705                 priv->pci_map_rx_address[counter] =
 706                     pci_map_single(priv->pdev, (void *) skb->data,
 707                                    MAX_FRAGMENT_SIZE_RX + 2,
 708                                    PCI_DMA_FROMDEVICE);
 709                 if (!priv->pci_map_rx_address[counter]) {
 710                         /* error mapping the buffer to device
 711                            accessable memory address */
 712                         printk(KERN_ERR "failed to map skb DMA'able\n");
 713                         goto out_free;
 714                 }
 715         }
 716
 717         prism54_acl_init(&priv->acl);
 718         prism54_wpa_bss_ie_init(priv);
 719         if (mgt_init(priv))
 720                 goto out_free;
 721
 722         return 0;
 723  out_free:
 724         islpci_free_memory(priv);
 725         return -1;
 726 }
 727
 728 int
 729 islpci_free_memory(islpci_private *priv)
 730 {
 731         int counter;
 732
 733         if (priv->device_base)
 734                 iounmap(priv->device_base);
 735         priv->device_base = NULL;
 736
 737         /* free consistent DMA area... */
 738         if (priv->driver_mem_address)
 739                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 740                                     priv->driver_mem_address,
 741                                     priv->device_host_address);
 742
 743         /* clear some dangling pointers */
 744         priv->driver_mem_address = NULL;
 745         priv->device_host_address = 0;
 746         priv->device_psm_buffer = 0;
 747         priv->control_block = NULL;
 748
 749         /* clean up mgmt rx buffers */
 750         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 751                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 752                 if (buf->pci_addr)
 753                         pci_unmap_single(priv->pdev, buf->pci_addr,
 754                                          buf->size, PCI_DMA_FROMDEVICE);
 755                 buf->pci_addr = 0;
 756                 kfree(buf->mem);
 757                 buf->size = 0;
 758                 buf->mem = NULL;
 759         }
 760
 761         /* clean up data rx buffers */
 762         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 763                 if (priv->pci_map_rx_address[counter])
 764                         pci_unmap_single(priv->pdev,
 765                                          priv->pci_map_rx_address[counter],
 766                                          MAX_FRAGMENT_SIZE_RX + 2,
 767                                          PCI_DMA_FROMDEVICE);
 768                 priv->pci_map_rx_address[counter] = 0;
 769
 770                 if (priv->data_low_rx[counter])
 771                         dev_kfree_skb(priv->data_low_rx[counter]);
 772                 priv->data_low_rx[counter] = NULL;
 773         }
 774
 775         /* Free the acces control list and the WPA list */
 776         prism54_acl_clean(&priv->acl);
 777         prism54_wpa_bss_ie_clean(priv);
 778         mgt_clean(priv);
 779
 780         return 0;
 781 }
 782
 783 #if 0
 784 static void
 785 islpci_set_multicast_list(struct net_device *dev)
 786 {
 787         /* put device into promisc mode and let network layer handle it */
 788 }
 789 #endif
 790
 791 static void islpci_ethtool_get_drvinfo(struct net_device *dev,
 792                                        struct ethtool_drvinfo *info)
 793 {
 794         strcpy(info->driver, DRV_NAME);
 795         strcpy(info->version, DRV_VERSION);
 796 }
 797
 798 static const struct ethtool_ops islpci_ethtool_ops = {
 799         .get_drvinfo = islpci_ethtool_get_drvinfo,
 800 };
 801
 802 static const struct net_device_ops islpci_netdev_ops = {
 803         .ndo_open               = islpci_open,
 804         .ndo_stop               = islpci_close,
 805         .ndo_do_ioctl           = prism54_ioctl,
 806         .ndo_start_xmit         = islpci_eth_transmit,
 807         .ndo_tx_timeout         = islpci_eth_tx_timeout,
 808         .ndo_set_mac_address    = prism54_set_mac_address,
 809         .ndo_change_mtu         = eth_change_mtu,
 810         .ndo_validate_addr      = eth_validate_addr,
 811 };
 812
 813 struct net_device *
 814 islpci_setup(struct pci_dev *pdev)
 815 {
 816         islpci_private *priv;
 817         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 818
 819         if (!ndev)
 820                 return ndev;
 821
 822         pci_set_drvdata(pdev, ndev);
 823 #if defined(SET_NETDEV_DEV)
 824         SET_NETDEV_DEV(ndev, &pdev->dev);
 825 #endif
 826
 827         /* setup the structure members */
 828         ndev->base_addr = pci_resource_start(pdev, 0);
 829         ndev->irq = pdev->irq;
 830
 831         /* initialize the function pointers */
 832         ndev->netdev_ops = &islpci_netdev_ops;
 833         ndev->wireless_handlers = &prism54_handler_def;
 834         ndev->ethtool_ops = &islpci_ethtool_ops;
 835
 836         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 837         ndev->addr_len = ETH_ALEN;
 838         /* Get a non-zero dummy MAC address for nameif. Jean II */
 839         memcpy(ndev->dev_addr, dummy_mac, 6);
 840
 841         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 842
 843         /* allocate a private device structure to the network device  */
 844         priv = netdev_priv(ndev);
 845         priv->ndev = ndev;
 846         priv->pdev = pdev;
 847         priv->monitor_type = ARPHRD_IEEE80211;
 848         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 849                 priv->monitor_type : ARPHRD_ETHER;
 850
 851         /* Add pointers to enable iwspy support. */
 852         priv->wireless_data.spy_data = &priv->spy_data;
 853         ndev->wireless_data = &priv->wireless_data;
 854
 855         /* save the start and end address of the PCI memory area */
 856         ndev->mem_start = (unsigned long) priv->device_base;
 857         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 858
 859 #if VERBOSE > SHOW_ERROR_MESSAGES
 860         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 861 #endif
 862
 863         init_waitqueue_head(&priv->reset_done);
 864
 865         /* init the queue read locks, process wait counter */
 866         mutex_init(&priv->mgmt_lock);
 867         priv->mgmt_received = NULL;
 868         init_waitqueue_head(&priv->mgmt_wqueue);
 869         mutex_init(&priv->stats_lock);
 870         spin_lock_init(&priv->slock);
 871
 872         /* init state machine with off#1 state */
 873         priv->state = PRV_STATE_OFF;
 874         priv->state_off = 1;
 875
 876         /* initialize workqueue's */
 877         INIT_WORK(&priv->stats_work, prism54_update_stats);
 878         priv->stats_timestamp = 0;
 879
 880         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
 881         priv->reset_task_pending = 0;
 882
 883         /* allocate various memory areas */
 884         if (islpci_alloc_memory(priv))
 885                 goto do_free_netdev;
 886
 887         /* select the firmware file depending on the device id */
 888         switch (pdev->device) {
 889         case 0x3877:
 890                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 891                 break;
 892
 893         case 0x3886:
 894                 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 895                 break;
 896
 897         default:
 898                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 899                 break;
 900         }
 901
 902         if (register_netdev(ndev)) {
 903                 DEBUG(SHOW_ERROR_MESSAGES,
 904                       "ERROR: register_netdev() failed\n");
 905                 goto do_islpci_free_memory;
 906         }
 907
 908         return ndev;
 909
 910       do_islpci_free_memory:
 911         islpci_free_memory(priv);
 912       do_free_netdev:
 913         pci_set_drvdata(pdev, NULL);
 914         free_netdev(ndev);
 915         priv = NULL;
 916         return NULL;
 917 }
 918
 919 islpci_state_t
 920 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 921 {
 922         islpci_state_t old_state;
 923
 924         /* lock */
 925         old_state = priv->state;
 926
 927         /* this means either a race condition or some serious error in
 928          * the driver code */
 929         switch (new_state) {
 930         case PRV_STATE_OFF:
 931                 priv->state_off++;
 932         default:
 933                 priv->state = new_state;
 934                 break;
 935
 936         case PRV_STATE_PREBOOT:
 937                 /* there are actually many off-states, enumerated by
 938                  * state_off */
 939                 if (old_state == PRV_STATE_OFF)
 940                         priv->state_off--;
 941
 942                 /* only if hw_unavailable is zero now it means we either
 943                  * were in off#1 state, or came here from
 944                  * somewhere else */
 945                 if (!priv->state_off)
 946                         priv->state = new_state;
 947                 break;
 948         };
 949 #if 0
 950         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 951                priv->ndev->name, old_state, new_state, priv->state_off);
 952 #endif
 953
 954         /* invariants */
 955         BUG_ON(priv->state_off < 0);
 956         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 957         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 958
 959         /* unlock */
 960         return old_state;
 961 }