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 /*      netif_mark_up( ndev ); */
 391
 392         return 0;
 393 }
 394
 395 static int
 396 islpci_close(struct net_device *ndev)
 397 {
 398         islpci_private *priv = netdev_priv(ndev);
 399
 400         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 401
 402         netif_stop_queue(ndev);
 403
 404         return prism54_bring_down(priv);
 405 }
 406
 407 static int
 408 prism54_bring_down(islpci_private *priv)
 409 {
 410         void __iomem *device_base = priv->device_base;
 411         u32 reg;
 412         /* we are going to shutdown the device */
 413         islpci_set_state(priv, PRV_STATE_PREBOOT);
 414
 415         /* disable all device interrupts in case they weren't */
 416         isl38xx_disable_interrupts(priv->device_base);
 417
 418         /* For safety reasons, we may want to ensure that no DMA transfer is
 419          * currently in progress by emptying the TX and RX queues. */
 420
 421         /* wait until interrupts have finished executing on other CPUs */
 422         synchronize_irq(priv->pdev->irq);
 423
 424         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 425         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 426         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 427         wmb();
 428         udelay(ISL38XX_WRITEIO_DELAY);
 429
 430         reg |= ISL38XX_CTRL_STAT_RESET;
 431         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 432         wmb();
 433         udelay(ISL38XX_WRITEIO_DELAY);
 434
 435         /* clear the Reset bit */
 436         reg &= ~ISL38XX_CTRL_STAT_RESET;
 437         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 438         wmb();
 439
 440         /* wait a while for the device to reset */
 441         schedule_timeout_uninterruptible(msecs_to_jiffies(50));
 442
 443         return 0;
 444 }
 445
 446 static int
 447 islpci_upload_fw(islpci_private *priv)
 448 {
 449         islpci_state_t old_state;
 450         u32 rc;
 451
 452         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 453
 454         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 455
 456         rc = isl_upload_firmware(priv);
 457         if (rc) {
 458                 /* error uploading the firmware */
 459                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 460                        priv->ndev->name, priv->firmware);
 461
 462                 islpci_set_state(priv, old_state);
 463                 return rc;
 464         }
 465
 466         printk(KERN_DEBUG "%s: firmware upload complete\n",
 467                priv->ndev->name);
 468
 469         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 470
 471         return 0;
 472 }
 473
 474 static int
 475 islpci_reset_if(islpci_private *priv)
 476 {
 477         long remaining;
 478         int result = -ETIME;
 479         int count;
 480
 481         DEFINE_WAIT(wait);
 482         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 483
 484         /* now the last step is to reset the interface */
 485         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 486         islpci_set_state(priv, PRV_STATE_PREINIT);
 487
 488         for(count = 0; count < 2 && result; count++) {
 489                 /* The software reset acknowledge needs about 220 msec here.
 490                  * Be conservative and wait for up to one second. */
 491
 492                 remaining = schedule_timeout_uninterruptible(HZ);
 493
 494                 if(remaining > 0) {
 495                         result = 0;
 496                         break;
 497                 }
 498
 499                 /* If we're here it's because our IRQ hasn't yet gone through.
 500                  * Retry a bit more...
 501                  */
 502                 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
 503                         priv->ndev->name);
 504         }
 505
 506         finish_wait(&priv->reset_done, &wait);
 507
 508         if (result) {
 509                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 510                 return result;
 511         }
 512
 513         islpci_set_state(priv, PRV_STATE_INIT);
 514
 515         /* Now that the device is 100% up, let's allow
 516          * for the other interrupts --
 517          * NOTE: this is not *yet* true since we've only allowed the
 518          * INIT interrupt on the IRQ line. We can perhaps poll
 519          * the IRQ line until we know for sure the reset went through */
 520         isl38xx_enable_common_interrupts(priv->device_base);
 521
 522         down_write(&priv->mib_sem);
 523         result = mgt_commit(priv);
 524         if (result) {
 525                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 526                 up_write(&priv->mib_sem);
 527                 return result;
 528         }
 529         up_write(&priv->mib_sem);
 530
 531         islpci_set_state(priv, PRV_STATE_READY);
 532
 533         printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
 534         return 0;
 535 }
 536
 537 int
 538 islpci_reset(islpci_private *priv, int reload_firmware)
 539 {
 540         isl38xx_control_block *cb =    /* volatile not needed */
 541                 (isl38xx_control_block *) priv->control_block;
 542         unsigned counter;
 543         int rc;
 544
 545         if (reload_firmware)
 546                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 547         else
 548                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 549
 550         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 551
 552         /* disable all device interrupts in case they weren't */
 553         isl38xx_disable_interrupts(priv->device_base);
 554
 555         /* flush all management queues */
 556         priv->index_mgmt_tx = 0;
 557         priv->index_mgmt_rx = 0;
 558
 559         /* clear the indexes in the frame pointer */
 560         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 561                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 562                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 563         }
 564
 565         /* reset the mgmt receive queue */
 566         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 567                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 568                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 569                 frag->flags = 0;
 570                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 571         }
 572
 573         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 574                 cb->rx_data_low[counter].address =
 575                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 576         }
 577
 578         /* since the receive queues are filled with empty fragments, now we can
 579          * set the corresponding indexes in the Control Block */
 580         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 581             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 582         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 583             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 584
 585         /* reset the remaining real index registers and full flags */
 586         priv->free_data_rx = 0;
 587         priv->free_data_tx = 0;
 588         priv->data_low_tx_full = 0;
 589
 590         if (reload_firmware) { /* Should we load the firmware ? */
 591         /* now that the data structures are cleaned up, upload
 592          * firmware and reset interface */
 593                 rc = islpci_upload_fw(priv);
 594                 if (rc) {
 595                         printk(KERN_ERR "%s: islpci_reset: failure\n",
 596                                 priv->ndev->name);
 597                         return rc;
 598                 }
 599         }
 600
 601         /* finally reset interface */
 602         rc = islpci_reset_if(priv);
 603         if (rc)
 604                 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 605         return rc;
 606 }
 607
 608 static struct net_device_stats *
 609 islpci_statistics(struct net_device *ndev)
 610 {
 611         islpci_private *priv = netdev_priv(ndev);
 612
 613 #if VERBOSE > SHOW_ERROR_MESSAGES
 614         DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics\n");
 615 #endif
 616
 617         return &priv->statistics;
 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 struct ethtool_ops islpci_ethtool_ops = {
 799         .get_drvinfo = islpci_ethtool_get_drvinfo,
 800 };
 801
 802 struct net_device *
 803 islpci_setup(struct pci_dev *pdev)
 804 {
 805         islpci_private *priv;
 806         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 807
 808         if (!ndev)
 809                 return ndev;
 810
 811         pci_set_drvdata(pdev, ndev);
 812 #if defined(SET_NETDEV_DEV)
 813         SET_NETDEV_DEV(ndev, &pdev->dev);
 814 #endif
 815
 816         /* setup the structure members */
 817         ndev->base_addr = pci_resource_start(pdev, 0);
 818         ndev->irq = pdev->irq;
 819
 820         /* initialize the function pointers */
 821         ndev->open = &islpci_open;
 822         ndev->stop = &islpci_close;
 823         ndev->get_stats = &islpci_statistics;
 824         ndev->do_ioctl = &prism54_ioctl;
 825         ndev->wireless_handlers =
 826             (struct iw_handler_def *) &prism54_handler_def;
 827         ndev->ethtool_ops = &islpci_ethtool_ops;
 828
 829         ndev->hard_start_xmit = &islpci_eth_transmit;
 830         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 831         ndev->addr_len = ETH_ALEN;
 832         ndev->set_mac_address = &prism54_set_mac_address;
 833         /* Get a non-zero dummy MAC address for nameif. Jean II */
 834         memcpy(ndev->dev_addr, dummy_mac, 6);
 835
 836 #ifdef HAVE_TX_TIMEOUT
 837         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 838         ndev->tx_timeout = &islpci_eth_tx_timeout;
 839 #endif
 840
 841         /* allocate a private device structure to the network device  */
 842         priv = netdev_priv(ndev);
 843         priv->ndev = ndev;
 844         priv->pdev = pdev;
 845         priv->monitor_type = ARPHRD_IEEE80211;
 846         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 847                 priv->monitor_type : ARPHRD_ETHER;
 848
 849         /* Add pointers to enable iwspy support. */
 850         priv->wireless_data.spy_data = &priv->spy_data;
 851         ndev->wireless_data = &priv->wireless_data;
 852
 853         /* save the start and end address of the PCI memory area */
 854         ndev->mem_start = (unsigned long) priv->device_base;
 855         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 856
 857 #if VERBOSE > SHOW_ERROR_MESSAGES
 858         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 859 #endif
 860
 861         init_waitqueue_head(&priv->reset_done);
 862
 863         /* init the queue read locks, process wait counter */
 864         sema_init(&priv->mgmt_sem, 1);
 865         priv->mgmt_received = NULL;
 866         init_waitqueue_head(&priv->mgmt_wqueue);
 867         sema_init(&priv->stats_sem, 1);
 868         spin_lock_init(&priv->slock);
 869
 870         /* init state machine with off#1 state */
 871         priv->state = PRV_STATE_OFF;
 872         priv->state_off = 1;
 873
 874         /* initialize workqueue's */
 875         INIT_WORK(&priv->stats_work, prism54_update_stats);
 876         priv->stats_timestamp = 0;
 877
 878         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
 879         priv->reset_task_pending = 0;
 880
 881         /* allocate various memory areas */
 882         if (islpci_alloc_memory(priv))
 883                 goto do_free_netdev;
 884
 885         /* select the firmware file depending on the device id */
 886         switch (pdev->device) {
 887         case 0x3877:
 888                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 889                 break;
 890
 891         case 0x3886:
 892                 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 893                 break;
 894
 895         default:
 896                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 897                 break;
 898         }
 899
 900         if (register_netdev(ndev)) {
 901                 DEBUG(SHOW_ERROR_MESSAGES,
 902                       "ERROR: register_netdev() failed \n");
 903                 goto do_islpci_free_memory;
 904         }
 905
 906         return ndev;
 907
 908       do_islpci_free_memory:
 909         islpci_free_memory(priv);
 910       do_free_netdev:
 911         pci_set_drvdata(pdev, NULL);
 912         free_netdev(ndev);
 913         priv = NULL;
 914         return NULL;
 915 }
 916
 917 islpci_state_t
 918 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 919 {
 920         islpci_state_t old_state;
 921
 922         /* lock */
 923         old_state = priv->state;
 924
 925         /* this means either a race condition or some serious error in
 926          * the driver code */
 927         switch (new_state) {
 928         case PRV_STATE_OFF:
 929                 priv->state_off++;
 930         default:
 931                 priv->state = new_state;
 932                 break;
 933
 934         case PRV_STATE_PREBOOT:
 935                 /* there are actually many off-states, enumerated by
 936                  * state_off */
 937                 if (old_state == PRV_STATE_OFF)
 938                         priv->state_off--;
 939
 940                 /* only if hw_unavailable is zero now it means we either
 941                  * were in off#1 state, or came here from
 942                  * somewhere else */
 943                 if (!priv->state_off)
 944                         priv->state = new_state;
 945                 break;
 946         };
 947 #if 0
 948         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 949                priv->ndev->name, old_state, new_state, priv->state_off);
 950 #endif
 951
 952         /* invariants */
 953         BUG_ON(priv->state_off < 0);
 954         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 955         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 956
 957         /* unlock */
 958         return old_state;
 959 }