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

   1 /*
   2  *  Copyright (C) 2002 Intersil Americas Inc.
   3  *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
   4  *  Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20
  21 #include <linux/module.h>
  22
  23 #include <linux/netdevice.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/pci.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/delay.h>
  28 #include <linux/if_arp.h>
  29
  30 #include <asm/io.h>
  31
  32 #include "prismcompat.h"
  33 #include "isl_38xx.h"
  34 #include "isl_ioctl.h"
  35 #include "islpci_dev.h"
  36 #include "islpci_mgt.h"
  37 #include "islpci_eth.h"
  38 #include "oid_mgt.h"
  39
  40 #define ISL3877_IMAGE_FILE      "isl3877"
  41 #define ISL3886_IMAGE_FILE      "isl3886"
  42 #define ISL3890_IMAGE_FILE      "isl3890"
  43
  44 static int prism54_bring_down(islpci_private *);
  45 static int islpci_alloc_memory(islpci_private *);
  46 static struct net_device_stats *islpci_statistics(struct net_device *);
  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 static 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 __iomem *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 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 117
 118                         /* set the card's base address for writing 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                 /* Firmware version is at offset 40 (also for "newmac") */
 146                 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
 147                        priv->ndev->name, fw_entry->data + 40);
 148
 149                 release_firmware(fw_entry);
 150         }
 151
 152         /* now reset the device
 153          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 154         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 155         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 156         reg &= ~ISL38XX_CTRL_STAT_RESET;
 157         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 158         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 159         wmb();
 160         udelay(ISL38XX_WRITEIO_DELAY);
 161
 162         /* set the reset bit latches the host override and RAMBoot bits
 163          * into the device for operation when the reset bit is reset */
 164         reg |= ISL38XX_CTRL_STAT_RESET;
 165         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 166         /* don't do flush PCI posting here! */
 167         wmb();
 168         udelay(ISL38XX_WRITEIO_DELAY);
 169
 170         /* clear the reset bit should start the whole circus */
 171         reg &= ~ISL38XX_CTRL_STAT_RESET;
 172         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 173         /* don't do flush PCI posting here! */
 174         wmb();
 175         udelay(ISL38XX_WRITEIO_DELAY);
 176
 177         return 0;
 178 }
 179
 180 /******************************************************************************
 181     Device Interrupt Handler
 182 ******************************************************************************/
 183
 184 irqreturn_t
 185 islpci_interrupt(int irq, void *config)
 186 {
 187         u32 reg;
 188         islpci_private *priv = config;
 189         struct net_device *ndev = priv->ndev;
 190         void __iomem *device = priv->device_base;
 191         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 192
 193         /* lock the interrupt handler */
 194         spin_lock(&priv->slock);
 195
 196         /* received an interrupt request on a shared IRQ line
 197          * first check whether the device is in sleep mode */
 198         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 199         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 200                 /* device is in sleep mode, IRQ was generated by someone else */
 201         {
 202 #if VERBOSE > SHOW_ERROR_MESSAGES
 203                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 204 #endif
 205                 spin_unlock(&priv->slock);
 206                 return IRQ_NONE;
 207         }
 208
 209
 210         /* check whether there is any source of interrupt on the device */
 211         reg = readl(device + ISL38XX_INT_IDENT_REG);
 212
 213         /* also check the contents of the Interrupt Enable Register, because this
 214          * will filter out interrupt sources from other devices on the same irq ! */
 215         reg &= readl(device + ISL38XX_INT_EN_REG);
 216         reg &= ISL38XX_INT_SOURCES;
 217
 218         if (reg != 0) {
 219                 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 220                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 221
 222                 /* reset the request bits in the Identification register */
 223                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 224
 225 #if VERBOSE > SHOW_ERROR_MESSAGES
 226                 DEBUG(SHOW_FUNCTION_CALLS,
 227                       "IRQ: Identification register 0x%p 0x%x \n", device, reg);
 228 #endif
 229
 230                 /* check for each bit in the register separately */
 231                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 232 #if VERBOSE > SHOW_ERROR_MESSAGES
 233                         /* Queue has been updated */
 234                         DEBUG(SHOW_TRACING, "IRQ: Update flag \n");
 235
 236                         DEBUG(SHOW_QUEUE_INDEXES,
 237                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 238                               le32_to_cpu(priv->control_block->
 239                                           driver_curr_frag[0]),
 240                               le32_to_cpu(priv->control_block->
 241                                           driver_curr_frag[1]),
 242                               le32_to_cpu(priv->control_block->
 243                                           driver_curr_frag[2]),
 244                               le32_to_cpu(priv->control_block->
 245                                           driver_curr_frag[3]),
 246                               le32_to_cpu(priv->control_block->
 247                                           driver_curr_frag[4]),
 248                               le32_to_cpu(priv->control_block->
 249                                           driver_curr_frag[5])
 250                             );
 251
 252                         DEBUG(SHOW_QUEUE_INDEXES,
 253                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 254                               le32_to_cpu(priv->control_block->
 255                                           device_curr_frag[0]),
 256                               le32_to_cpu(priv->control_block->
 257                                           device_curr_frag[1]),
 258                               le32_to_cpu(priv->control_block->
 259                                           device_curr_frag[2]),
 260                               le32_to_cpu(priv->control_block->
 261                                           device_curr_frag[3]),
 262                               le32_to_cpu(priv->control_block->
 263                                           device_curr_frag[4]),
 264                               le32_to_cpu(priv->control_block->
 265                                           device_curr_frag[5])
 266                             );
 267 #endif
 268
 269                         /* cleanup the data low transmit queue */
 270                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 271
 272                         /* device is in active state, update the
 273                          * powerstate flag if necessary */
 274                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 275
 276                         /* check all three queues in priority order
 277                          * call the PIMFOR receive function until the
 278                          * queue is empty */
 279                         if (isl38xx_in_queue(priv->control_block,
 280                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 281 #if VERBOSE > SHOW_ERROR_MESSAGES
 282                                 DEBUG(SHOW_TRACING,
 283                                       "Received frame in Management Queue\n");
 284 #endif
 285                                 islpci_mgt_receive(ndev);
 286
 287                                 islpci_mgt_cleanup_transmit(ndev);
 288
 289                                 /* Refill slots in receive queue */
 290                                 islpci_mgmt_rx_fill(ndev);
 291
 292                                 /* no need to trigger the device, next
 293                                    islpci_mgt_transaction does it */
 294                         }
 295
 296                         while (isl38xx_in_queue(priv->control_block,
 297                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 298 #if VERBOSE > SHOW_ERROR_MESSAGES
 299                                 DEBUG(SHOW_TRACING,
 300                                       "Received frame in Data Low Queue \n");
 301 #endif
 302                                 islpci_eth_receive(priv);
 303                         }
 304
 305                         /* check whether the data transmit queues were full */
 306                         if (priv->data_low_tx_full) {
 307                                 /* check whether the transmit is not full anymore */
 308                                 if (ISL38XX_CB_TX_QSIZE -
 309                                     isl38xx_in_queue(priv->control_block,
 310                                                      ISL38XX_CB_TX_DATA_LQ) >=
 311                                     ISL38XX_MIN_QTHRESHOLD) {
 312                                         /* nope, the driver is ready for more network frames */
 313                                         netif_wake_queue(priv->ndev);
 314
 315                                         /* reset the full flag */
 316                                         priv->data_low_tx_full = 0;
 317                                 }
 318                         }
 319                 }
 320
 321                 if (reg & ISL38XX_INT_IDENT_INIT) {
 322                         /* Device has been initialized */
 323 #if VERBOSE > SHOW_ERROR_MESSAGES
 324                         DEBUG(SHOW_TRACING,
 325                               "IRQ: Init flag, device initialized \n");
 326 #endif
 327                         wake_up(&priv->reset_done);
 328                 }
 329
 330                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 331                         /* Device intends to move to powersave state */
 332 #if VERBOSE > SHOW_ERROR_MESSAGES
 333                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n");
 334 #endif
 335                         isl38xx_handle_sleep_request(priv->control_block,
 336                                                      &powerstate,
 337                                                      priv->device_base);
 338                 }
 339
 340                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 341                         /* Device has been woken up to active state */
 342 #if VERBOSE > SHOW_ERROR_MESSAGES
 343                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n");
 344 #endif
 345
 346                         isl38xx_handle_wakeup(priv->control_block,
 347                                               &powerstate, priv->device_base);
 348                 }
 349         } else {
 350 #if VERBOSE > SHOW_ERROR_MESSAGES
 351                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 352 #endif
 353                 spin_unlock(&priv->slock);
 354                 return IRQ_NONE;
 355         }
 356
 357         /* sleep -> ready */
 358         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 359             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 360                 islpci_set_state(priv, PRV_STATE_READY);
 361
 362         /* !sleep -> sleep */
 363         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 364             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 365                 islpci_set_state(priv, PRV_STATE_SLEEP);
 366
 367         /* unlock the interrupt handler */
 368         spin_unlock(&priv->slock);
 369
 370         return IRQ_HANDLED;
 371 }
 372
 373 /******************************************************************************
 374     Network Interface Control & Statistical functions
 375 ******************************************************************************/
 376 static int
 377 islpci_open(struct net_device *ndev)
 378 {
 379         u32 rc;
 380         islpci_private *priv = netdev_priv(ndev);
 381
 382         /* reset data structures, upload firmware and reset device */
 383         rc = islpci_reset(priv,1);
 384         if (rc) {
 385                 prism54_bring_down(priv);
 386                 return rc; /* Returns informative message */
 387         }
 388
 389         netif_start_queue(ndev);
 390
 391         /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
 392          * once the firmware receives a trap of being associated
 393          * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
 394          * should just leave the carrier on as its expected the firmware
 395          * won't send us a trigger. */
 396         if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
 397                 netif_carrier_off(ndev);
 398         else
 399                 netif_carrier_on(ndev);
 400
 401         return 0;
 402 }
 403
 404 static int
 405 islpci_close(struct net_device *ndev)
 406 {
 407         islpci_private *priv = netdev_priv(ndev);
 408
 409         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 410
 411         netif_stop_queue(ndev);
 412
 413         return prism54_bring_down(priv);
 414 }
 415
 416 static int
 417 prism54_bring_down(islpci_private *priv)
 418 {
 419         void __iomem *device_base = priv->device_base;
 420         u32 reg;
 421         /* we are going to shutdown the device */
 422         islpci_set_state(priv, PRV_STATE_PREBOOT);
 423
 424         /* disable all device interrupts in case they weren't */
 425         isl38xx_disable_interrupts(priv->device_base);
 426
 427         /* For safety reasons, we may want to ensure that no DMA transfer is
 428          * currently in progress by emptying the TX and RX queues. */
 429
 430         /* wait until interrupts have finished executing on other CPUs */
 431         synchronize_irq(priv->pdev->irq);
 432
 433         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 434         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 435         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 436         wmb();
 437         udelay(ISL38XX_WRITEIO_DELAY);
 438
 439         reg |= ISL38XX_CTRL_STAT_RESET;
 440         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 441         wmb();
 442         udelay(ISL38XX_WRITEIO_DELAY);
 443
 444         /* clear the Reset bit */
 445         reg &= ~ISL38XX_CTRL_STAT_RESET;
 446         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 447         wmb();
 448
 449         /* wait a while for the device to reset */
 450         schedule_timeout_uninterruptible(msecs_to_jiffies(50));
 451
 452         return 0;
 453 }
 454
 455 static int
 456 islpci_upload_fw(islpci_private *priv)
 457 {
 458         islpci_state_t old_state;
 459         u32 rc;
 460
 461         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 462
 463         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 464
 465         rc = isl_upload_firmware(priv);
 466         if (rc) {
 467                 /* error uploading the firmware */
 468                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 469                        priv->ndev->name, priv->firmware);
 470
 471                 islpci_set_state(priv, old_state);
 472                 return rc;
 473         }
 474
 475         printk(KERN_DEBUG "%s: firmware upload complete\n",
 476                priv->ndev->name);
 477
 478         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 479
 480         return 0;
 481 }
 482
 483 static int
 484 islpci_reset_if(islpci_private *priv)
 485 {
 486         long remaining;
 487         int result = -ETIME;
 488         int count;
 489
 490         DEFINE_WAIT(wait);
 491         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 492
 493         /* now the last step is to reset the interface */
 494         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 495         islpci_set_state(priv, PRV_STATE_PREINIT);
 496
 497         for(count = 0; count < 2 && result; count++) {
 498                 /* The software reset acknowledge needs about 220 msec here.
 499                  * Be conservative and wait for up to one second. */
 500
 501                 remaining = schedule_timeout_uninterruptible(HZ);
 502
 503                 if(remaining > 0) {
 504                         result = 0;
 505                         break;
 506                 }
 507
 508                 /* If we're here it's because our IRQ hasn't yet gone through.
 509                  * Retry a bit more...
 510                  */
 511                 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
 512                         priv->ndev->name);
 513         }
 514
 515         finish_wait(&priv->reset_done, &wait);
 516
 517         if (result) {
 518                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 519                 return result;
 520         }
 521
 522         islpci_set_state(priv, PRV_STATE_INIT);
 523
 524         /* Now that the device is 100% up, let's allow
 525          * for the other interrupts --
 526          * NOTE: this is not *yet* true since we've only allowed the
 527          * INIT interrupt on the IRQ line. We can perhaps poll
 528          * the IRQ line until we know for sure the reset went through */
 529         isl38xx_enable_common_interrupts(priv->device_base);
 530
 531         down_write(&priv->mib_sem);
 532         result = mgt_commit(priv);
 533         if (result) {
 534                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 535                 up_write(&priv->mib_sem);
 536                 return result;
 537         }
 538         up_write(&priv->mib_sem);
 539
 540         islpci_set_state(priv, PRV_STATE_READY);
 541
 542         printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
 543         return 0;
 544 }
 545
 546 int
 547 islpci_reset(islpci_private *priv, int reload_firmware)
 548 {
 549         isl38xx_control_block *cb =    /* volatile not needed */
 550                 (isl38xx_control_block *) priv->control_block;
 551         unsigned counter;
 552         int rc;
 553
 554         if (reload_firmware)
 555                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 556         else
 557                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 558
 559         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 560
 561         /* disable all device interrupts in case they weren't */
 562         isl38xx_disable_interrupts(priv->device_base);
 563
 564         /* flush all management queues */
 565         priv->index_mgmt_tx = 0;
 566         priv->index_mgmt_rx = 0;
 567
 568         /* clear the indexes in the frame pointer */
 569         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 570                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 571                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 572         }
 573
 574         /* reset the mgmt receive queue */
 575         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 576                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 577                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 578                 frag->flags = 0;
 579                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 580         }
 581
 582         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 583                 cb->rx_data_low[counter].address =
 584                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 585         }
 586
 587         /* since the receive queues are filled with empty fragments, now we can
 588          * set the corresponding indexes in the Control Block */
 589         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 590             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 591         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 592             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 593
 594         /* reset the remaining real index registers and full flags */
 595         priv->free_data_rx = 0;
 596         priv->free_data_tx = 0;
 597         priv->data_low_tx_full = 0;
 598
 599         if (reload_firmware) { /* Should we load the firmware ? */
 600         /* now that the data structures are cleaned up, upload
 601          * firmware and reset interface */
 602                 rc = islpci_upload_fw(priv);
 603                 if (rc) {
 604                         printk(KERN_ERR "%s: islpci_reset: failure\n",
 605                                 priv->ndev->name);
 606                         return rc;
 607                 }
 608         }
 609
 610         /* finally reset interface */
 611         rc = islpci_reset_if(priv);
 612         if (rc)
 613                 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 614         return rc;
 615 }
 616
 617 static struct net_device_stats *
 618 islpci_statistics(struct net_device *ndev)
 619 {
 620         islpci_private *priv = netdev_priv(ndev);
 621
 622 #if VERBOSE > SHOW_ERROR_MESSAGES
 623         DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics\n");
 624 #endif
 625
 626         return &priv->statistics;
 627 }
 628
 629 /******************************************************************************
 630     Network device configuration functions
 631 ******************************************************************************/
 632 static int
 633 islpci_alloc_memory(islpci_private *priv)
 634 {
 635         int counter;
 636
 637 #if VERBOSE > SHOW_ERROR_MESSAGES
 638         printk(KERN_DEBUG "islpci_alloc_memory\n");
 639 #endif
 640
 641         /* remap the PCI device base address to accessable */
 642         if (!(priv->device_base =
 643               ioremap(pci_resource_start(priv->pdev, 0),
 644                       ISL38XX_PCI_MEM_SIZE))) {
 645                 /* error in remapping the PCI device memory address range */
 646                 printk(KERN_ERR "PCI memory remapping failed \n");
 647                 return -1;
 648         }
 649
 650         /* memory layout for consistent DMA region:
 651          *
 652          * Area 1: Control Block for the device interface
 653          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 654          *         the number of supported stations in the AP determines the minimal
 655          *         size of the buffer !
 656          */
 657
 658         /* perform the allocation */
 659         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 660                                                         HOST_MEM_BLOCK,
 661                                                         &priv->
 662                                                         device_host_address);
 663
 664         if (!priv->driver_mem_address) {
 665                 /* error allocating the block of PCI memory */
 666                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 667                        "prism54");
 668                 return -1;
 669         }
 670
 671         /* assign the Control Block to the first address of the allocated area */
 672         priv->control_block =
 673             (isl38xx_control_block *) priv->driver_mem_address;
 674
 675         /* set the Power Save Buffer pointer directly behind the CB */
 676         priv->device_psm_buffer =
 677                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 678
 679         /* make sure all buffer pointers are initialized */
 680         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 681                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 682                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 683         }
 684
 685         priv->index_mgmt_rx = 0;
 686         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 687         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 688
 689         /* allocate rx queue for management frames */
 690         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 691                 goto out_free;
 692
 693         /* now get the data rx skb's */
 694         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 695         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 696
 697         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 698                 struct sk_buff *skb;
 699
 700                 /* allocate an sk_buff for received data frames storage
 701                  * each frame on receive size consists of 1 fragment
 702                  * include any required allignment operations */
 703                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 704                         /* error allocating an sk_buff structure elements */
 705                         printk(KERN_ERR "Error allocating skb.\n");
 706                         skb = NULL;
 707                         goto out_free;
 708                 }
 709                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 710                 /* add the new allocated sk_buff to the buffer array */
 711                 priv->data_low_rx[counter] = skb;
 712
 713                 /* map the allocated skb data area to pci */
 714                 priv->pci_map_rx_address[counter] =
 715                     pci_map_single(priv->pdev, (void *) skb->data,
 716                                    MAX_FRAGMENT_SIZE_RX + 2,
 717                                    PCI_DMA_FROMDEVICE);
 718                 if (!priv->pci_map_rx_address[counter]) {
 719                         /* error mapping the buffer to device
 720                            accessable memory address */
 721                         printk(KERN_ERR "failed to map skb DMA'able\n");
 722                         goto out_free;
 723                 }
 724         }
 725
 726         prism54_acl_init(&priv->acl);
 727         prism54_wpa_bss_ie_init(priv);
 728         if (mgt_init(priv))
 729                 goto out_free;
 730
 731         return 0;
 732  out_free:
 733         islpci_free_memory(priv);
 734         return -1;
 735 }
 736
 737 int
 738 islpci_free_memory(islpci_private *priv)
 739 {
 740         int counter;
 741
 742         if (priv->device_base)
 743                 iounmap(priv->device_base);
 744         priv->device_base = NULL;
 745
 746         /* free consistent DMA area... */
 747         if (priv->driver_mem_address)
 748                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 749                                     priv->driver_mem_address,
 750                                     priv->device_host_address);
 751
 752         /* clear some dangling pointers */
 753         priv->driver_mem_address = NULL;
 754         priv->device_host_address = 0;
 755         priv->device_psm_buffer = 0;
 756         priv->control_block = NULL;
 757
 758         /* clean up mgmt rx buffers */
 759         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 760                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 761                 if (buf->pci_addr)
 762                         pci_unmap_single(priv->pdev, buf->pci_addr,
 763                                          buf->size, PCI_DMA_FROMDEVICE);
 764                 buf->pci_addr = 0;
 765                 kfree(buf->mem);
 766                 buf->size = 0;
 767                 buf->mem = NULL;
 768         }
 769
 770         /* clean up data rx buffers */
 771         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 772                 if (priv->pci_map_rx_address[counter])
 773                         pci_unmap_single(priv->pdev,
 774                                          priv->pci_map_rx_address[counter],
 775                                          MAX_FRAGMENT_SIZE_RX + 2,
 776                                          PCI_DMA_FROMDEVICE);
 777                 priv->pci_map_rx_address[counter] = 0;
 778
 779                 if (priv->data_low_rx[counter])
 780                         dev_kfree_skb(priv->data_low_rx[counter]);
 781                 priv->data_low_rx[counter] = NULL;
 782         }
 783
 784         /* Free the acces control list and the WPA list */
 785         prism54_acl_clean(&priv->acl);
 786         prism54_wpa_bss_ie_clean(priv);
 787         mgt_clean(priv);
 788
 789         return 0;
 790 }
 791
 792 #if 0
 793 static void
 794 islpci_set_multicast_list(struct net_device *dev)
 795 {
 796         /* put device into promisc mode and let network layer handle it */
 797 }
 798 #endif
 799
 800 static void islpci_ethtool_get_drvinfo(struct net_device *dev,
 801                                        struct ethtool_drvinfo *info)
 802 {
 803         strcpy(info->driver, DRV_NAME);
 804         strcpy(info->version, DRV_VERSION);
 805 }
 806
 807 static struct ethtool_ops islpci_ethtool_ops = {
 808         .get_drvinfo = islpci_ethtool_get_drvinfo,
 809 };
 810
 811 struct net_device *
 812 islpci_setup(struct pci_dev *pdev)
 813 {
 814         islpci_private *priv;
 815         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 816
 817         if (!ndev)
 818                 return ndev;
 819
 820         pci_set_drvdata(pdev, ndev);
 821 #if defined(SET_NETDEV_DEV)
 822         SET_NETDEV_DEV(ndev, &pdev->dev);
 823 #endif
 824
 825         /* setup the structure members */
 826         ndev->base_addr = pci_resource_start(pdev, 0);
 827         ndev->irq = pdev->irq;
 828
 829         /* initialize the function pointers */
 830         ndev->open = &islpci_open;
 831         ndev->stop = &islpci_close;
 832         ndev->get_stats = &islpci_statistics;
 833         ndev->do_ioctl = &prism54_ioctl;
 834         ndev->wireless_handlers =
 835             (struct iw_handler_def *) &prism54_handler_def;
 836         ndev->ethtool_ops = &islpci_ethtool_ops;
 837
 838         ndev->hard_start_xmit = &islpci_eth_transmit;
 839         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 840         ndev->addr_len = ETH_ALEN;
 841         ndev->set_mac_address = &prism54_set_mac_address;
 842         /* Get a non-zero dummy MAC address for nameif. Jean II */
 843         memcpy(ndev->dev_addr, dummy_mac, 6);
 844
 845 #ifdef HAVE_TX_TIMEOUT
 846         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 847         ndev->tx_timeout = &islpci_eth_tx_timeout;
 848 #endif
 849
 850         /* allocate a private device structure to the network device  */
 851         priv = netdev_priv(ndev);
 852         priv->ndev = ndev;
 853         priv->pdev = pdev;
 854         priv->monitor_type = ARPHRD_IEEE80211;
 855         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 856                 priv->monitor_type : ARPHRD_ETHER;
 857
 858         /* Add pointers to enable iwspy support. */
 859         priv->wireless_data.spy_data = &priv->spy_data;
 860         ndev->wireless_data = &priv->wireless_data;
 861
 862         /* save the start and end address of the PCI memory area */
 863         ndev->mem_start = (unsigned long) priv->device_base;
 864         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 865
 866 #if VERBOSE > SHOW_ERROR_MESSAGES
 867         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 868 #endif
 869
 870         init_waitqueue_head(&priv->reset_done);
 871
 872         /* init the queue read locks, process wait counter */
 873         mutex_init(&priv->mgmt_lock);
 874         priv->mgmt_received = NULL;
 875         init_waitqueue_head(&priv->mgmt_wqueue);
 876         mutex_init(&priv->stats_lock);
 877         spin_lock_init(&priv->slock);
 878
 879         /* init state machine with off#1 state */
 880         priv->state = PRV_STATE_OFF;
 881         priv->state_off = 1;
 882
 883         /* initialize workqueue's */
 884         INIT_WORK(&priv->stats_work, prism54_update_stats);
 885         priv->stats_timestamp = 0;
 886
 887         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
 888         priv->reset_task_pending = 0;
 889
 890         /* allocate various memory areas */
 891         if (islpci_alloc_memory(priv))
 892                 goto do_free_netdev;
 893
 894         /* select the firmware file depending on the device id */
 895         switch (pdev->device) {
 896         case 0x3877:
 897                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 898                 break;
 899
 900         case 0x3886:
 901                 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 902                 break;
 903
 904         default:
 905                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 906                 break;
 907         }
 908
 909         if (register_netdev(ndev)) {
 910                 DEBUG(SHOW_ERROR_MESSAGES,
 911                       "ERROR: register_netdev() failed \n");
 912                 goto do_islpci_free_memory;
 913         }
 914
 915         return ndev;
 916
 917       do_islpci_free_memory:
 918         islpci_free_memory(priv);
 919       do_free_netdev:
 920         pci_set_drvdata(pdev, NULL);
 921         free_netdev(ndev);
 922         priv = NULL;
 923         return NULL;
 924 }
 925
 926 islpci_state_t
 927 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 928 {
 929         islpci_state_t old_state;
 930
 931         /* lock */
 932         old_state = priv->state;
 933
 934         /* this means either a race condition or some serious error in
 935          * the driver code */
 936         switch (new_state) {
 937         case PRV_STATE_OFF:
 938                 priv->state_off++;
 939         default:
 940                 priv->state = new_state;
 941                 break;
 942
 943         case PRV_STATE_PREBOOT:
 944                 /* there are actually many off-states, enumerated by
 945                  * state_off */
 946                 if (old_state == PRV_STATE_OFF)
 947                         priv->state_off--;
 948
 949                 /* only if hw_unavailable is zero now it means we either
 950                  * were in off#1 state, or came here from
 951                  * somewhere else */
 952                 if (!priv->state_off)
 953                         priv->state = new_state;
 954                 break;
 955         };
 956 #if 0
 957         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 958                priv->ndev->name, old_state, new_state, priv->state_off);
 959 #endif
 960
 961         /* invariants */
 962         BUG_ON(priv->state_off < 0);
 963         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 964         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 965
 966         /* unlock */
 967         return old_state;
 968 }