drivers/net/wireless/intersil/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, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #include <linux/hardirq.h>
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23
  24 #include <linux/netdevice.h>
  25 #include <linux/ethtool.h>
  26 #include <linux/pci.h>
  27 #include <linux/sched.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/delay.h>
  30 #include <linux/if_arp.h>
  31
  32 #include <asm/io.h>
  33
  34 #include "prismcompat.h"
  35 #include "isl_38xx.h"
  36 #include "isl_ioctl.h"
  37 #include "islpci_dev.h"
  38 #include "islpci_mgt.h"
  39 #include "islpci_eth.h"
  40 #include "oid_mgt.h"
  41
  42 #define ISL3877_IMAGE_FILE      "/*(DEBLOBBED)*/"
  43 #define ISL3886_IMAGE_FILE      "/*(DEBLOBBED)*/"
  44 #define ISL3890_IMAGE_FILE      "/*(DEBLOBBED)*/"
  45 /*(DEBLOBBED)*/
  46
  47 static int prism54_bring_down(islpci_private *);
  48 static int islpci_alloc_memory(islpci_private *);
  49
  50 /* Temporary dummy MAC address to use until firmware is loaded.
  51  * The idea there is that some tools (such as nameif) may query
  52  * the MAC address before the netdev is 'open'. By using a valid
  53  * OUI prefix, they can process the netdev properly.
  54  * Of course, this is not the final/real MAC address. It doesn't
  55  * matter, as you are suppose to be able to change it anytime via
  56  * ndev->set_mac_address. Jean II */
  57 static const unsigned char      dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  58
  59 static int
  60 isl_upload_firmware(islpci_private *priv)
  61 {
  62         u32 reg, rc;
  63         void __iomem *device_base = priv->device_base;
  64
  65         /* clear the RAMBoot and the Reset bit */
  66         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  67         reg &= ~ISL38XX_CTRL_STAT_RESET;
  68         reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  69         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  70         wmb();
  71         udelay(ISL38XX_WRITEIO_DELAY);
  72
  73         /* set the Reset bit without reading the register ! */
  74         reg |= ISL38XX_CTRL_STAT_RESET;
  75         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  76         wmb();
  77         udelay(ISL38XX_WRITEIO_DELAY);
  78
  79         /* clear the Reset bit */
  80         reg &= ~ISL38XX_CTRL_STAT_RESET;
  81         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  82         wmb();
  83
  84         /* wait a while for the device to reboot */
  85         mdelay(50);
  86
  87         {
  88                 const struct firmware *fw_entry = NULL;
  89                 long fw_len;
  90                 const u32 *fw_ptr;
  91
  92                 rc = reject_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  93                 if (rc) {
  94                         printk(KERN_ERR
  95                                "%s: reject_firmware() failed for '%s'\n",
  96                                "prism54", priv->firmware);
  97                         return rc;
  98                 }
  99                 /* prepare the Direct Memory Base register */
 100                 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
 101
 102                 fw_ptr = (u32 *) fw_entry->data;
 103                 fw_len = fw_entry->size;
 104
 105                 if (fw_len % 4) {
 106                         printk(KERN_ERR
 107                                "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
 108                                "prism54", priv->firmware);
 109                         release_firmware(fw_entry);
 110                         return -EILSEQ; /* Illegal byte sequence  */;
 111                 }
 112
 113                 while (fw_len > 0) {
 114                         long _fw_len =
 115                             (fw_len >
 116                              ISL38XX_MEMORY_WINDOW_SIZE) ?
 117                             ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 118                         u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 119
 120                         /* set the card's base address for writing the data */
 121                         isl38xx_w32_flush(device_base, reg,
 122                                           ISL38XX_DIR_MEM_BASE_REG);
 123                         wmb();  /* be paranoid */
 124
 125                         /* increment the write address for next iteration */
 126                         reg += _fw_len;
 127                         fw_len -= _fw_len;
 128
 129                         /* write the data to the Direct Memory Window 32bit-wise */
 130                         /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 131                         while (_fw_len > 0) {
 132                                 /* use non-swapping writel() */
 133                                 __raw_writel(*fw_ptr, dev_fw_ptr);
 134                                 fw_ptr++, dev_fw_ptr++;
 135                                 _fw_len -= 4;
 136                         }
 137
 138                         /* flush PCI posting */
 139                         (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 140                         wmb();  /* be paranoid again */
 141
 142                         BUG_ON(_fw_len != 0);
 143                 }
 144
 145                 BUG_ON(fw_len != 0);
 146
 147                 /* Firmware version is at offset 40 (also for "newmac") */
 148                 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
 149                        priv->ndev->name, fw_entry->data + 40);
 150
 151                 release_firmware(fw_entry);
 152         }
 153
 154         /* now reset the device
 155          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 156         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 157         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 158         reg &= ~ISL38XX_CTRL_STAT_RESET;
 159         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 160         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 161         wmb();
 162         udelay(ISL38XX_WRITEIO_DELAY);
 163
 164         /* set the reset bit latches the host override and RAMBoot bits
 165          * into the device for operation when the reset bit is reset */
 166         reg |= ISL38XX_CTRL_STAT_RESET;
 167         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 168         /* don't do flush PCI posting here! */
 169         wmb();
 170         udelay(ISL38XX_WRITEIO_DELAY);
 171
 172         /* clear the reset bit should start the whole circus */
 173         reg &= ~ISL38XX_CTRL_STAT_RESET;
 174         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 175         /* don't do flush PCI posting here! */
 176         wmb();
 177         udelay(ISL38XX_WRITEIO_DELAY);
 178
 179         return 0;
 180 }
 181
 182 /******************************************************************************
 183     Device Interrupt Handler
 184 ******************************************************************************/
 185
 186 irqreturn_t
 187 islpci_interrupt(int irq, void *config)
 188 {
 189         u32 reg;
 190         islpci_private *priv = config;
 191         struct net_device *ndev = priv->ndev;
 192         void __iomem *device = priv->device_base;
 193         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 194
 195         /* lock the interrupt handler */
 196         spin_lock(&priv->slock);
 197
 198         /* received an interrupt request on a shared IRQ line
 199          * first check whether the device is in sleep mode */
 200         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 201         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 202                 /* device is in sleep mode, IRQ was generated by someone else */
 203         {
 204 #if VERBOSE > SHOW_ERROR_MESSAGES
 205                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 206 #endif
 207                 spin_unlock(&priv->slock);
 208                 return IRQ_NONE;
 209         }
 210
 211
 212         /* check whether there is any source of interrupt on the device */
 213         reg = readl(device + ISL38XX_INT_IDENT_REG);
 214
 215         /* also check the contents of the Interrupt Enable Register, because this
 216          * will filter out interrupt sources from other devices on the same irq ! */
 217         reg &= readl(device + ISL38XX_INT_EN_REG);
 218         reg &= ISL38XX_INT_SOURCES;
 219
 220         if (reg != 0) {
 221                 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 222                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 223
 224                 /* reset the request bits in the Identification register */
 225                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 226
 227 #if VERBOSE > SHOW_ERROR_MESSAGES
 228                 DEBUG(SHOW_FUNCTION_CALLS,
 229                       "IRQ: Identification register 0x%p 0x%x\n", device, reg);
 230 #endif
 231
 232                 /* check for each bit in the register separately */
 233                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 234 #if VERBOSE > SHOW_ERROR_MESSAGES
 235                         /* Queue has been updated */
 236                         DEBUG(SHOW_TRACING, "IRQ: Update flag\n");
 237
 238                         DEBUG(SHOW_QUEUE_INDEXES,
 239                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 240                               le32_to_cpu(priv->control_block->
 241                                           driver_curr_frag[0]),
 242                               le32_to_cpu(priv->control_block->
 243                                           driver_curr_frag[1]),
 244                               le32_to_cpu(priv->control_block->
 245                                           driver_curr_frag[2]),
 246                               le32_to_cpu(priv->control_block->
 247                                           driver_curr_frag[3]),
 248                               le32_to_cpu(priv->control_block->
 249                                           driver_curr_frag[4]),
 250                               le32_to_cpu(priv->control_block->
 251                                           driver_curr_frag[5])
 252                             );
 253
 254                         DEBUG(SHOW_QUEUE_INDEXES,
 255                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 256                               le32_to_cpu(priv->control_block->
 257                                           device_curr_frag[0]),
 258                               le32_to_cpu(priv->control_block->
 259                                           device_curr_frag[1]),
 260                               le32_to_cpu(priv->control_block->
 261                                           device_curr_frag[2]),
 262                               le32_to_cpu(priv->control_block->
 263                                           device_curr_frag[3]),
 264                               le32_to_cpu(priv->control_block->
 265                                           device_curr_frag[4]),
 266                               le32_to_cpu(priv->control_block->
 267                                           device_curr_frag[5])
 268                             );
 269 #endif
 270
 271                         /* cleanup the data low transmit queue */
 272                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 273
 274                         /* device is in active state, update the
 275                          * powerstate flag if necessary */
 276                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 277
 278                         /* check all three queues in priority order
 279                          * call the PIMFOR receive function until the
 280                          * queue is empty */
 281                         if (isl38xx_in_queue(priv->control_block,
 282                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 283 #if VERBOSE > SHOW_ERROR_MESSAGES
 284                                 DEBUG(SHOW_TRACING,
 285                                       "Received frame in Management Queue\n");
 286 #endif
 287                                 islpci_mgt_receive(ndev);
 288
 289                                 islpci_mgt_cleanup_transmit(ndev);
 290
 291                                 /* Refill slots in receive queue */
 292                                 islpci_mgmt_rx_fill(ndev);
 293
 294                                 /* no need to trigger the device, next
 295                                    islpci_mgt_transaction does it */
 296                         }
 297
 298                         while (isl38xx_in_queue(priv->control_block,
 299                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 300 #if VERBOSE > SHOW_ERROR_MESSAGES
 301                                 DEBUG(SHOW_TRACING,
 302                                       "Received frame in Data Low Queue\n");
 303 #endif
 304                                 islpci_eth_receive(priv);
 305                         }
 306
 307                         /* check whether the data transmit queues were full */
 308                         if (priv->data_low_tx_full) {
 309                                 /* check whether the transmit is not full anymore */
 310                                 if (ISL38XX_CB_TX_QSIZE -
 311                                     isl38xx_in_queue(priv->control_block,
 312                                                      ISL38XX_CB_TX_DATA_LQ) >=
 313                                     ISL38XX_MIN_QTHRESHOLD) {
 314                                         /* nope, the driver is ready for more network frames */
 315                                         netif_wake_queue(priv->ndev);
 316
 317                                         /* reset the full flag */
 318                                         priv->data_low_tx_full = 0;
 319                                 }
 320                         }
 321                 }
 322
 323                 if (reg & ISL38XX_INT_IDENT_INIT) {
 324                         /* Device has been initialized */
 325 #if VERBOSE > SHOW_ERROR_MESSAGES
 326                         DEBUG(SHOW_TRACING,
 327                               "IRQ: Init flag, device initialized\n");
 328 #endif
 329                         wake_up(&priv->reset_done);
 330                 }
 331
 332                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 333                         /* Device intends to move to powersave state */
 334 #if VERBOSE > SHOW_ERROR_MESSAGES
 335                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag\n");
 336 #endif
 337                         isl38xx_handle_sleep_request(priv->control_block,
 338                                                      &powerstate,
 339                                                      priv->device_base);
 340                 }
 341
 342                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 343                         /* Device has been woken up to active state */
 344 #if VERBOSE > SHOW_ERROR_MESSAGES
 345                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag\n");
 346 #endif
 347
 348                         isl38xx_handle_wakeup(priv->control_block,
 349                                               &powerstate, priv->device_base);
 350                 }
 351         } else {
 352 #if VERBOSE > SHOW_ERROR_MESSAGES
 353                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 354 #endif
 355                 spin_unlock(&priv->slock);
 356                 return IRQ_NONE;
 357         }
 358
 359         /* sleep -> ready */
 360         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 361             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 362                 islpci_set_state(priv, PRV_STATE_READY);
 363
 364         /* !sleep -> sleep */
 365         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 366             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 367                 islpci_set_state(priv, PRV_STATE_SLEEP);
 368
 369         /* unlock the interrupt handler */
 370         spin_unlock(&priv->slock);
 371
 372         return IRQ_HANDLED;
 373 }
 374
 375 /******************************************************************************
 376     Network Interface Control & Statistical functions
 377 ******************************************************************************/
 378 static int
 379 islpci_open(struct net_device *ndev)
 380 {
 381         u32 rc;
 382         islpci_private *priv = netdev_priv(ndev);
 383
 384         /* reset data structures, upload firmware and reset device */
 385         rc = islpci_reset(priv,1);
 386         if (rc) {
 387                 prism54_bring_down(priv);
 388                 return rc; /* Returns informative message */
 389         }
 390
 391         netif_start_queue(ndev);
 392
 393         /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
 394          * once the firmware receives a trap of being associated
 395          * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
 396          * should just leave the carrier on as its expected the firmware
 397          * won't send us a trigger. */
 398         if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
 399                 netif_carrier_off(ndev);
 400         else
 401                 netif_carrier_on(ndev);
 402
 403         return 0;
 404 }
 405
 406 static int
 407 islpci_close(struct net_device *ndev)
 408 {
 409         islpci_private *priv = netdev_priv(ndev);
 410
 411         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 412
 413         netif_stop_queue(ndev);
 414
 415         return prism54_bring_down(priv);
 416 }
 417
 418 static int
 419 prism54_bring_down(islpci_private *priv)
 420 {
 421         void __iomem *device_base = priv->device_base;
 422         u32 reg;
 423         /* we are going to shutdown the device */
 424         islpci_set_state(priv, PRV_STATE_PREBOOT);
 425
 426         /* disable all device interrupts in case they weren't */
 427         isl38xx_disable_interrupts(priv->device_base);
 428
 429         /* For safety reasons, we may want to ensure that no DMA transfer is
 430          * currently in progress by emptying the TX and RX queues. */
 431
 432         /* wait until interrupts have finished executing on other CPUs */
 433         synchronize_irq(priv->pdev->irq);
 434
 435         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 436         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 437         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 438         wmb();
 439         udelay(ISL38XX_WRITEIO_DELAY);
 440
 441         reg |= ISL38XX_CTRL_STAT_RESET;
 442         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 443         wmb();
 444         udelay(ISL38XX_WRITEIO_DELAY);
 445
 446         /* clear the Reset bit */
 447         reg &= ~ISL38XX_CTRL_STAT_RESET;
 448         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 449         wmb();
 450
 451         /* wait a while for the device to reset */
 452         schedule_timeout_uninterruptible(msecs_to_jiffies(50));
 453
 454         return 0;
 455 }
 456
 457 static int
 458 islpci_upload_fw(islpci_private *priv)
 459 {
 460         islpci_state_t old_state;
 461         u32 rc;
 462
 463         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 464
 465         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 466
 467         rc = isl_upload_firmware(priv);
 468         if (rc) {
 469                 /* error uploading the firmware */
 470                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 471                        priv->ndev->name, priv->firmware);
 472
 473                 islpci_set_state(priv, old_state);
 474                 return rc;
 475         }
 476
 477         printk(KERN_DEBUG "%s: firmware upload complete\n",
 478                priv->ndev->name);
 479
 480         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 481
 482         return 0;
 483 }
 484
 485 static int
 486 islpci_reset_if(islpci_private *priv)
 487 {
 488         long remaining;
 489         int result = -ETIME;
 490         int count;
 491
 492         DEFINE_WAIT(wait);
 493         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 494
 495         /* now the last step is to reset the interface */
 496         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 497         islpci_set_state(priv, PRV_STATE_PREINIT);
 498
 499         for(count = 0; count < 2 && result; count++) {
 500                 /* The software reset acknowledge needs about 220 msec here.
 501                  * Be conservative and wait for up to one second. */
 502
 503                 remaining = schedule_timeout_uninterruptible(HZ);
 504
 505                 if(remaining > 0) {
 506                         result = 0;
 507                         break;
 508                 }
 509
 510                 /* If we're here it's because our IRQ hasn't yet gone through.
 511                  * Retry a bit more...
 512                  */
 513                 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
 514                         priv->ndev->name);
 515         }
 516
 517         finish_wait(&priv->reset_done, &wait);
 518
 519         if (result) {
 520                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 521                 return result;
 522         }
 523
 524         islpci_set_state(priv, PRV_STATE_INIT);
 525
 526         /* Now that the device is 100% up, let's allow
 527          * for the other interrupts --
 528          * NOTE: this is not *yet* true since we've only allowed the
 529          * INIT interrupt on the IRQ line. We can perhaps poll
 530          * the IRQ line until we know for sure the reset went through */
 531         isl38xx_enable_common_interrupts(priv->device_base);
 532
 533         down_write(&priv->mib_sem);
 534         result = mgt_commit(priv);
 535         if (result) {
 536                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 537                 up_write(&priv->mib_sem);
 538                 return result;
 539         }
 540         up_write(&priv->mib_sem);
 541
 542         islpci_set_state(priv, PRV_STATE_READY);
 543
 544         printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
 545         return 0;
 546 }
 547
 548 int
 549 islpci_reset(islpci_private *priv, int reload_firmware)
 550 {
 551         isl38xx_control_block *cb =    /* volatile not needed */
 552                 (isl38xx_control_block *) priv->control_block;
 553         unsigned counter;
 554         int rc;
 555
 556         if (reload_firmware)
 557                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 558         else
 559                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 560
 561         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 562
 563         /* disable all device interrupts in case they weren't */
 564         isl38xx_disable_interrupts(priv->device_base);
 565
 566         /* flush all management queues */
 567         priv->index_mgmt_tx = 0;
 568         priv->index_mgmt_rx = 0;
 569
 570         /* clear the indexes in the frame pointer */
 571         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 572                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 573                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 574         }
 575
 576         /* reset the mgmt receive queue */
 577         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 578                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 579                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 580                 frag->flags = 0;
 581                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 582         }
 583
 584         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 585                 cb->rx_data_low[counter].address =
 586                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 587         }
 588
 589         /* since the receive queues are filled with empty fragments, now we can
 590          * set the corresponding indexes in the Control Block */
 591         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 592             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 593         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 594             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 595
 596         /* reset the remaining real index registers and full flags */
 597         priv->free_data_rx = 0;
 598         priv->free_data_tx = 0;
 599         priv->data_low_tx_full = 0;
 600
 601         if (reload_firmware) { /* Should we load the firmware ? */
 602         /* now that the data structures are cleaned up, upload
 603          * firmware and reset interface */
 604                 rc = islpci_upload_fw(priv);
 605                 if (rc) {
 606                         printk(KERN_ERR "%s: islpci_reset: failure\n",
 607                                 priv->ndev->name);
 608                         return rc;
 609                 }
 610         }
 611
 612         /* finally reset interface */
 613         rc = islpci_reset_if(priv);
 614         if (rc)
 615                 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 616         return rc;
 617 }
 618
 619 /******************************************************************************
 620     Network device configuration functions
 621 ******************************************************************************/
 622 static int
 623 islpci_alloc_memory(islpci_private *priv)
 624 {
 625         int counter;
 626
 627 #if VERBOSE > SHOW_ERROR_MESSAGES
 628         printk(KERN_DEBUG "islpci_alloc_memory\n");
 629 #endif
 630
 631         /* remap the PCI device base address to accessible */
 632         if (!(priv->device_base =
 633               ioremap(pci_resource_start(priv->pdev, 0),
 634                       ISL38XX_PCI_MEM_SIZE))) {
 635                 /* error in remapping the PCI device memory address range */
 636                 printk(KERN_ERR "PCI memory remapping failed\n");
 637                 return -1;
 638         }
 639
 640         /* memory layout for consistent DMA region:
 641          *
 642          * Area 1: Control Block for the device interface
 643          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 644          *         the number of supported stations in the AP determines the minimal
 645          *         size of the buffer !
 646          */
 647
 648         /* perform the allocation */
 649         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 650                                                         HOST_MEM_BLOCK,
 651                                                         &priv->
 652                                                         device_host_address);
 653
 654         if (!priv->driver_mem_address) {
 655                 /* error allocating the block of PCI memory */
 656                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 657                        "prism54");
 658                 return -1;
 659         }
 660
 661         /* assign the Control Block to the first address of the allocated area */
 662         priv->control_block =
 663             (isl38xx_control_block *) priv->driver_mem_address;
 664
 665         /* set the Power Save Buffer pointer directly behind the CB */
 666         priv->device_psm_buffer =
 667                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 668
 669         /* make sure all buffer pointers are initialized */
 670         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 671                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 672                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 673         }
 674
 675         priv->index_mgmt_rx = 0;
 676         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 677         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 678
 679         /* allocate rx queue for management frames */
 680         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 681                 goto out_free;
 682
 683         /* now get the data rx skb's */
 684         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 685         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 686
 687         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 688                 struct sk_buff *skb;
 689
 690                 /* allocate an sk_buff for received data frames storage
 691                  * each frame on receive size consists of 1 fragment
 692                  * include any required allignment operations */
 693                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 694                         /* error allocating an sk_buff structure elements */
 695                         printk(KERN_ERR "Error allocating skb.\n");
 696                         skb = NULL;
 697                         goto out_free;
 698                 }
 699                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 700                 /* add the new allocated sk_buff to the buffer array */
 701                 priv->data_low_rx[counter] = skb;
 702
 703                 /* map the allocated skb data area to pci */
 704                 priv->pci_map_rx_address[counter] =
 705                     pci_map_single(priv->pdev, (void *) skb->data,
 706                                    MAX_FRAGMENT_SIZE_RX + 2,
 707                                    PCI_DMA_FROMDEVICE);
 708                 if (pci_dma_mapping_error(priv->pdev,
 709                                           priv->pci_map_rx_address[counter])) {
 710                         priv->pci_map_rx_address[counter] = 0;
 711                         /* error mapping the buffer to device
 712                            accessible memory address */
 713                         printk(KERN_ERR "failed to map skb DMA'able\n");
 714                         goto out_free;
 715                 }
 716         }
 717
 718         prism54_acl_init(&priv->acl);
 719         prism54_wpa_bss_ie_init(priv);
 720         if (mgt_init(priv))
 721                 goto out_free;
 722
 723         return 0;
 724  out_free:
 725         islpci_free_memory(priv);
 726         return -1;
 727 }
 728
 729 int
 730 islpci_free_memory(islpci_private *priv)
 731 {
 732         int counter;
 733
 734         if (priv->device_base)
 735                 iounmap(priv->device_base);
 736         priv->device_base = NULL;
 737
 738         /* free consistent DMA area... */
 739         if (priv->driver_mem_address)
 740                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 741                                     priv->driver_mem_address,
 742                                     priv->device_host_address);
 743
 744         /* clear some dangling pointers */
 745         priv->driver_mem_address = NULL;
 746         priv->device_host_address = 0;
 747         priv->device_psm_buffer = 0;
 748         priv->control_block = NULL;
 749
 750         /* clean up mgmt rx buffers */
 751         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 752                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 753                 if (buf->pci_addr)
 754                         pci_unmap_single(priv->pdev, buf->pci_addr,
 755                                          buf->size, PCI_DMA_FROMDEVICE);
 756                 buf->pci_addr = 0;
 757                 kfree(buf->mem);
 758                 buf->size = 0;
 759                 buf->mem = NULL;
 760         }
 761
 762         /* clean up data rx buffers */
 763         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 764                 if (priv->pci_map_rx_address[counter])
 765                         pci_unmap_single(priv->pdev,
 766                                          priv->pci_map_rx_address[counter],
 767                                          MAX_FRAGMENT_SIZE_RX + 2,
 768                                          PCI_DMA_FROMDEVICE);
 769                 priv->pci_map_rx_address[counter] = 0;
 770
 771                 if (priv->data_low_rx[counter])
 772                         dev_kfree_skb(priv->data_low_rx[counter]);
 773                 priv->data_low_rx[counter] = NULL;
 774         }
 775
 776         /* Free the access control list and the WPA list */
 777         prism54_acl_clean(&priv->acl);
 778         prism54_wpa_bss_ie_clean(priv);
 779         mgt_clean(priv);
 780
 781         return 0;
 782 }
 783
 784 #if 0
 785 static void
 786 islpci_set_multicast_list(struct net_device *dev)
 787 {
 788         /* put device into promisc mode and let network layer handle it */
 789 }
 790 #endif
 791
 792 static void islpci_ethtool_get_drvinfo(struct net_device *dev,
 793                                        struct ethtool_drvinfo *info)
 794 {
 795         strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
 796         strlcpy(info->version, DRV_VERSION, sizeof(info->version));
 797 }
 798
 799 static const struct ethtool_ops islpci_ethtool_ops = {
 800         .get_drvinfo = islpci_ethtool_get_drvinfo,
 801 };
 802
 803 static const struct net_device_ops islpci_netdev_ops = {
 804         .ndo_open               = islpci_open,
 805         .ndo_stop               = islpci_close,
 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_validate_addr      = eth_validate_addr,
 810 };
 811
 812 static struct device_type wlan_type = {
 813         .name   = "wlan",
 814 };
 815
 816 struct net_device *
 817 islpci_setup(struct pci_dev *pdev)
 818 {
 819         islpci_private *priv;
 820         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 821
 822         if (!ndev)
 823                 return ndev;
 824
 825         pci_set_drvdata(pdev, ndev);
 826         SET_NETDEV_DEV(ndev, &pdev->dev);
 827         SET_NETDEV_DEVTYPE(ndev, &wlan_type);
 828
 829         /* setup the structure members */
 830         ndev->base_addr = pci_resource_start(pdev, 0);
 831         ndev->irq = pdev->irq;
 832
 833         /* initialize the function pointers */
 834         ndev->netdev_ops = &islpci_netdev_ops;
 835         ndev->wireless_handlers = &prism54_handler_def;
 836         ndev->ethtool_ops = &islpci_ethtool_ops;
 837
 838         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 839         ndev->addr_len = ETH_ALEN;
 840         /* Get a non-zero dummy MAC address for nameif. Jean II */
 841         memcpy(ndev->dev_addr, dummy_mac, ETH_ALEN);
 842
 843         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 844
 845         /* allocate a private device structure to the network device  */
 846         priv = netdev_priv(ndev);
 847         priv->ndev = ndev;
 848         priv->pdev = pdev;
 849         priv->monitor_type = ARPHRD_IEEE80211;
 850         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 851                 priv->monitor_type : ARPHRD_ETHER;
 852
 853         /* Add pointers to enable iwspy support. */
 854         priv->wireless_data.spy_data = &priv->spy_data;
 855         ndev->wireless_data = &priv->wireless_data;
 856
 857         /* save the start and end address of the PCI memory area */
 858         ndev->mem_start = (unsigned long) priv->device_base;
 859         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 860
 861 #if VERBOSE > SHOW_ERROR_MESSAGES
 862         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 863 #endif
 864
 865         init_waitqueue_head(&priv->reset_done);
 866
 867         /* init the queue read locks, process wait counter */
 868         mutex_init(&priv->mgmt_lock);
 869         priv->mgmt_received = NULL;
 870         init_waitqueue_head(&priv->mgmt_wqueue);
 871         mutex_init(&priv->stats_lock);
 872         spin_lock_init(&priv->slock);
 873
 874         /* init state machine with off#1 state */
 875         priv->state = PRV_STATE_OFF;
 876         priv->state_off = 1;
 877
 878         /* initialize workqueue's */
 879         INIT_WORK(&priv->stats_work, prism54_update_stats);
 880         priv->stats_timestamp = 0;
 881
 882         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
 883         priv->reset_task_pending = 0;
 884
 885         /* allocate various memory areas */
 886         if (islpci_alloc_memory(priv))
 887                 goto do_free_netdev;
 888
 889         /* select the firmware file depending on the device id */
 890         switch (pdev->device) {
 891         case 0x3877:
 892                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 893                 break;
 894
 895         case 0x3886:
 896                 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 897                 break;
 898
 899         default:
 900                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 901                 break;
 902         }
 903
 904         if (register_netdev(ndev)) {
 905                 DEBUG(SHOW_ERROR_MESSAGES,
 906                       "ERROR: register_netdev() failed\n");
 907                 goto do_islpci_free_memory;
 908         }
 909
 910         return ndev;
 911
 912       do_islpci_free_memory:
 913         islpci_free_memory(priv);
 914       do_free_netdev:
 915         free_netdev(ndev);
 916         priv = NULL;
 917         return NULL;
 918 }
 919
 920 islpci_state_t
 921 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 922 {
 923         islpci_state_t old_state;
 924
 925         /* lock */
 926         old_state = priv->state;
 927
 928         /* this means either a race condition or some serious error in
 929          * the driver code */
 930         switch (new_state) {
 931         case PRV_STATE_OFF:
 932                 priv->state_off++;
 933         default:
 934                 priv->state = new_state;
 935                 break;
 936
 937         case PRV_STATE_PREBOOT:
 938                 /* there are actually many off-states, enumerated by
 939                  * state_off */
 940                 if (old_state == PRV_STATE_OFF)
 941                         priv->state_off--;
 942
 943                 /* only if hw_unavailable is zero now it means we either
 944                  * were in off#1 state, or came here from
 945                  * somewhere else */
 946                 if (!priv->state_off)
 947                         priv->state = new_state;
 948                 break;
 949         }
 950 #if 0
 951         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 952                priv->ndev->name, old_state, new_state, priv->state_off);
 953 #endif
 954
 955         /* invariants */
 956         BUG_ON(priv->state_off < 0);
 957         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 958         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 959
 960         /* unlock */
 961         return old_state;
 962 }