drivers/net/wireless/prism54/islpci_dev.c

   1 /*
   2  *
   3  *  Copyright (C) 2002 Intersil Americas Inc.
   4  *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
   5  *  Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <linux/version.h>
  23 #include <linux/module.h>
  24
  25 #include <linux/netdevice.h>
  26 #include <linux/pci.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/delay.h>
  29 #include <linux/if_arp.h>
  30
  31 #include <asm/io.h>
  32
  33 #include "prismcompat.h"
  34 #include "isl_38xx.h"
  35 #include "isl_ioctl.h"
  36 #include "islpci_dev.h"
  37 #include "islpci_mgt.h"
  38 #include "islpci_eth.h"
  39 #include "oid_mgt.h"
  40
  41 #define ISL3877_IMAGE_FILE      "isl3877"
  42 #define ISL3890_IMAGE_FILE      "isl3890"
  43
  44 /* Temporary dummy MAC address to use until firmware is loaded.
  45  * The idea there is that some tools (such as nameif) may query
  46  * the MAC address before the netdev is 'open'. By using a valid
  47  * OUI prefix, they can process the netdev properly.
  48  * Of course, this is not the final/real MAC address. It doesn't
  49  * matter, as you are suppose to be able to change it anytime via
  50  * ndev->set_mac_address. Jean II */
  51 const unsigned char     dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  52
  53 static int
  54 isl_upload_firmware(islpci_private *priv)
  55 {
  56         u32 reg, rc;
  57         void *device_base = priv->device_base;
  58
  59         /* clear the RAMBoot and the Reset bit */
  60         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  61         reg &= ~ISL38XX_CTRL_STAT_RESET;
  62         reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  63         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  64         wmb();
  65         udelay(ISL38XX_WRITEIO_DELAY);
  66
  67         /* set the Reset bit without reading the register ! */
  68         reg |= ISL38XX_CTRL_STAT_RESET;
  69         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  70         wmb();
  71         udelay(ISL38XX_WRITEIO_DELAY);
  72
  73         /* clear the Reset bit */
  74         reg &= ~ISL38XX_CTRL_STAT_RESET;
  75         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  76         wmb();
  77
  78         /* wait a while for the device to reboot */
  79         mdelay(50);
  80
  81         {
  82                 const struct firmware *fw_entry = 0;
  83                 long fw_len;
  84                 const u32 *fw_ptr;
  85
  86                 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  87                 if (rc) {
  88                         printk(KERN_ERR
  89                                "%s: request_firmware() failed for '%s'\n",
  90                                "prism54", priv->firmware);
  91                         return rc;
  92                 }
  93                 /* prepare the Direct Memory Base register */
  94                 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
  95
  96                 fw_ptr = (u32 *) fw_entry->data;
  97                 fw_len = fw_entry->size;
  98
  99                 if (fw_len % 4) {
 100                         printk(KERN_ERR
 101                                "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
 102                                "prism54", priv->firmware);
 103                         release_firmware(fw_entry);
 104                         return EILSEQ; /* Illegal byte sequence  */;
 105                 }
 106
 107                 while (fw_len > 0) {
 108                         long _fw_len =
 109                             (fw_len >
 110                              ISL38XX_MEMORY_WINDOW_SIZE) ?
 111                             ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 112                         u32 *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 113
 114                         /* set the cards base address for writting the data */
 115                         isl38xx_w32_flush(device_base, reg,
 116                                           ISL38XX_DIR_MEM_BASE_REG);
 117                         wmb();  /* be paranoid */
 118
 119                         /* increment the write address for next iteration */
 120                         reg += _fw_len;
 121                         fw_len -= _fw_len;
 122
 123                         /* write the data to the Direct Memory Window 32bit-wise */
 124                         /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 125                         while (_fw_len > 0) {
 126                                 /* use non-swapping writel() */
 127                                 __raw_writel(*fw_ptr, dev_fw_ptr);
 128                                 fw_ptr++, dev_fw_ptr++;
 129                                 _fw_len -= 4;
 130                         }
 131
 132                         /* flush PCI posting */
 133                         (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 134                         wmb();  /* be paranoid again */
 135
 136                         BUG_ON(_fw_len != 0);
 137                 }
 138
 139                 BUG_ON(fw_len != 0);
 140
 141                 release_firmware(fw_entry);
 142         }
 143
 144         /* now reset the device
 145          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 146         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 147         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 148         reg &= ~ISL38XX_CTRL_STAT_RESET;
 149         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 150         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 151         wmb();
 152         udelay(ISL38XX_WRITEIO_DELAY);
 153
 154         /* set the reset bit latches the host override and RAMBoot bits
 155          * into the device for operation when the reset bit is reset */
 156         reg |= ISL38XX_CTRL_STAT_RESET;
 157         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 158         /* don't do flush PCI posting here! */
 159         wmb();
 160         udelay(ISL38XX_WRITEIO_DELAY);
 161
 162         /* clear the reset bit should start the whole circus */
 163         reg &= ~ISL38XX_CTRL_STAT_RESET;
 164         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 165         /* don't do flush PCI posting here! */
 166         wmb();
 167         udelay(ISL38XX_WRITEIO_DELAY);
 168
 169         return 0;
 170 }
 171
 172 /******************************************************************************
 173     Device Interrupt Handler
 174 ******************************************************************************/
 175
 176 irqreturn_t
 177 islpci_interrupt(int irq, void *config, struct pt_regs *regs)
 178 {
 179         u32 reg;
 180         islpci_private *priv = config;
 181         struct net_device *ndev = priv->ndev;
 182         void *device = priv->device_base;
 183         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 184
 185         /* received an interrupt request on a shared IRQ line
 186          * first check whether the device is in sleep mode */
 187         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 188         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 189                 /* device is in sleep mode, IRQ was generated by someone else */
 190         {
 191 #if VERBOSE > SHOW_ERROR_MESSAGES
 192                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 193 #endif
 194                 return IRQ_NONE;
 195         }
 196
 197         if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 198                 powerstate = ISL38XX_PSM_ACTIVE_STATE;
 199
 200         /* lock the interrupt handler */
 201         spin_lock(&priv->slock);
 202
 203         /* check whether there is any source of interrupt on the device */
 204         reg = readl(device + ISL38XX_INT_IDENT_REG);
 205
 206         /* also check the contents of the Interrupt Enable Register, because this
 207          * will filter out interrupt sources from other devices on the same irq ! */
 208         reg &= readl(device + ISL38XX_INT_EN_REG);
 209         reg &= ISL38XX_INT_SOURCES;
 210
 211         if (reg != 0) {
 212                 /* reset the request bits in the Identification register */
 213                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 214
 215 #if VERBOSE > SHOW_ERROR_MESSAGES
 216                 DEBUG(SHOW_FUNCTION_CALLS,
 217                       "IRQ: Identification register 0x%p 0x%x \n", device, reg);
 218 #endif
 219
 220                 /* check for each bit in the register separately */
 221                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 222 #if VERBOSE > SHOW_ERROR_MESSAGES
 223                         /* Queue has been updated */
 224                         DEBUG(SHOW_TRACING, "IRQ: Update flag \n");
 225
 226                         DEBUG(SHOW_QUEUE_INDEXES,
 227                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 228                               le32_to_cpu(priv->control_block->
 229                                           driver_curr_frag[0]),
 230                               le32_to_cpu(priv->control_block->
 231                                           driver_curr_frag[1]),
 232                               le32_to_cpu(priv->control_block->
 233                                           driver_curr_frag[2]),
 234                               le32_to_cpu(priv->control_block->
 235                                           driver_curr_frag[3]),
 236                               le32_to_cpu(priv->control_block->
 237                                           driver_curr_frag[4]),
 238                               le32_to_cpu(priv->control_block->
 239                                           driver_curr_frag[5])
 240                             );
 241
 242                         DEBUG(SHOW_QUEUE_INDEXES,
 243                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 244                               le32_to_cpu(priv->control_block->
 245                                           device_curr_frag[0]),
 246                               le32_to_cpu(priv->control_block->
 247                                           device_curr_frag[1]),
 248                               le32_to_cpu(priv->control_block->
 249                                           device_curr_frag[2]),
 250                               le32_to_cpu(priv->control_block->
 251                                           device_curr_frag[3]),
 252                               le32_to_cpu(priv->control_block->
 253                                           device_curr_frag[4]),
 254                               le32_to_cpu(priv->control_block->
 255                                           device_curr_frag[5])
 256                             );
 257 #endif
 258
 259                         /* cleanup the data low transmit queue */
 260                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 261
 262                         /* device is in active state, update the
 263                          * powerstate flag if necessary */
 264                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 265
 266                         /* check all three queues in priority order
 267                          * call the PIMFOR receive function until the
 268                          * queue is empty */
 269                         if (isl38xx_in_queue(priv->control_block,
 270                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 271 #if VERBOSE > SHOW_ERROR_MESSAGES
 272                                 DEBUG(SHOW_TRACING,
 273                                       "Received frame in Management Queue\n");
 274 #endif
 275                                 islpci_mgt_receive(ndev);
 276
 277                                 islpci_mgt_cleanup_transmit(ndev);
 278
 279                                 /* Refill slots in receive queue */
 280                                 islpci_mgmt_rx_fill(ndev);
 281
 282                                 /* no need to trigger the device, next
 283                                    islpci_mgt_transaction does it */
 284                         }
 285
 286                         while (isl38xx_in_queue(priv->control_block,
 287                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 288 #if VERBOSE > SHOW_ERROR_MESSAGES
 289                                 DEBUG(SHOW_TRACING,
 290                                       "Received frame in Data Low Queue \n");
 291 #endif
 292                                 islpci_eth_receive(priv);
 293                         }
 294
 295                         /* check whether the data transmit queues were full */
 296                         if (priv->data_low_tx_full) {
 297                                 /* check whether the transmit is not full anymore */
 298                                 if (ISL38XX_CB_TX_QSIZE -
 299                                     isl38xx_in_queue(priv->control_block,
 300                                                      ISL38XX_CB_TX_DATA_LQ) >=
 301                                     ISL38XX_MIN_QTHRESHOLD) {
 302                                         /* nope, the driver is ready for more network frames */
 303                                         netif_wake_queue(priv->ndev);
 304
 305                                         /* reset the full flag */
 306                                         priv->data_low_tx_full = 0;
 307                                 }
 308                         }
 309                 }
 310
 311                 if (reg & ISL38XX_INT_IDENT_INIT) {
 312                         /* Device has been initialized */
 313 #if VERBOSE > SHOW_ERROR_MESSAGES
 314                         DEBUG(SHOW_TRACING,
 315                               "IRQ: Init flag, device initialized \n");
 316 #endif
 317                         wake_up(&priv->reset_done);
 318                 }
 319
 320                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 321                         /* Device intends to move to powersave state */
 322 #if VERBOSE > SHOW_ERROR_MESSAGES
 323                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n");
 324 #endif
 325                         isl38xx_handle_sleep_request(priv->control_block,
 326                                                      &powerstate,
 327                                                      priv->device_base);
 328                 }
 329
 330                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 331                         /* Device has been woken up to active state */
 332 #if VERBOSE > SHOW_ERROR_MESSAGES
 333                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n");
 334 #endif
 335
 336                         isl38xx_handle_wakeup(priv->control_block,
 337                                               &powerstate, priv->device_base);
 338                 }
 339         }
 340
 341         /* sleep -> ready */
 342         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 343             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 344                 islpci_set_state(priv, PRV_STATE_READY);
 345
 346         /* !sleep -> sleep */
 347         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 348             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 349                 islpci_set_state(priv, PRV_STATE_SLEEP);
 350
 351         /* unlock the interrupt handler */
 352         spin_unlock(&priv->slock);
 353
 354         return IRQ_HANDLED;
 355 }
 356
 357 /******************************************************************************
 358     Network Interface Control & Statistical functions
 359 ******************************************************************************/
 360 static int
 361 islpci_open(struct net_device *ndev)
 362 {
 363         u32 rc;
 364         islpci_private *priv = netdev_priv(ndev);
 365
 366         printk(KERN_DEBUG "%s: islpci_open()\n", ndev->name);
 367
 368         /* reset data structures, upload firmware and reset device */
 369         rc = islpci_reset(priv,1);
 370         if (rc) {
 371                 prism54_bring_down(priv);
 372                 return rc; /* Returns informative message */
 373         }
 374
 375         netif_start_queue(ndev);
 376 /*      netif_mark_up( ndev ); */
 377
 378         return 0;
 379 }
 380
 381 static int
 382 islpci_close(struct net_device *ndev)
 383 {
 384         islpci_private *priv = netdev_priv(ndev);
 385
 386         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 387
 388         netif_stop_queue(ndev);
 389
 390         return prism54_bring_down(priv);
 391 }
 392
 393 int
 394 prism54_bring_down(islpci_private *priv)
 395 {
 396         void *device_base = priv->device_base;
 397         u32 reg;
 398         /* we are going to shutdown the device */
 399         islpci_set_state(priv, PRV_STATE_PREBOOT);
 400
 401         /* disable all device interrupts in case they weren't */
 402         isl38xx_disable_interrupts(priv->device_base);
 403
 404         /* For safety reasons, we may want to ensure that no DMA transfer is
 405          * currently in progress by emptying the TX and RX queues. */
 406
 407         /* wait until interrupts have finished executing on other CPUs */
 408         prism54_synchronize_irq(priv->pdev->irq);
 409
 410         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 411         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 412         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 413         wmb();
 414         udelay(ISL38XX_WRITEIO_DELAY);
 415
 416         reg |= ISL38XX_CTRL_STAT_RESET;
 417         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 418         wmb();
 419         udelay(ISL38XX_WRITEIO_DELAY);
 420
 421         /* clear the Reset bit */
 422         reg &= ~ISL38XX_CTRL_STAT_RESET;
 423         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 424         wmb();
 425
 426         /* wait a while for the device to reset */
 427         set_current_state(TASK_UNINTERRUPTIBLE);
 428         schedule_timeout(50*HZ/1000);
 429
 430         return 0;
 431 }
 432
 433 static int
 434 islpci_upload_fw(islpci_private *priv)
 435 {
 436         islpci_state_t old_state;
 437         u32 rc;
 438
 439         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 440
 441         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 442
 443         rc = isl_upload_firmware(priv);
 444         if (rc) {
 445                 /* error uploading the firmware */
 446                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 447                        priv->ndev->name, priv->firmware);
 448
 449                 islpci_set_state(priv, old_state);
 450                 return rc;
 451         }
 452
 453         printk(KERN_DEBUG
 454                "%s: firmware uploaded done, now triggering reset...\n",
 455                priv->ndev->name);
 456
 457         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 458
 459         return 0;
 460 }
 461
 462 static int
 463 islpci_reset_if(islpci_private *priv)
 464 {
 465         long remaining;
 466         int result = -ETIME;
 467         int count;
 468
 469         DEFINE_WAIT(wait);
 470         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 471
 472         /* now the last step is to reset the interface */
 473         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 474         islpci_set_state(priv, PRV_STATE_PREINIT);
 475
 476         for(count = 0; count < 2 && result; count++) {
 477                 /* The software reset acknowledge needs about 220 msec here.
 478                  * Be conservative and wait for up to one second. */
 479
 480                 remaining = schedule_timeout(HZ);
 481
 482                 if(remaining > 0) {
 483                         result = 0;
 484                         break;
 485                 }
 486
 487                 /* If we're here it's because our IRQ hasn't yet gone through.
 488                  * Retry a bit more...
 489                  */
 490                  printk(KERN_ERR "%s: device soft reset timed out\n",
 491                        priv->ndev->name);
 492
 493         }
 494
 495         finish_wait(&priv->reset_done, &wait);
 496
 497         if(result)
 498                 return result;
 499
 500         islpci_set_state(priv, PRV_STATE_INIT);
 501
 502         /* Now that the device is 100% up, let's allow
 503          * for the other interrupts --
 504          * NOTE: this is not *yet* true since we've only allowed the
 505          * INIT interrupt on the IRQ line. We can perhaps poll
 506          * the IRQ line until we know for sure the reset went through */
 507         isl38xx_enable_common_interrupts(priv->device_base);
 508
 509         down_write(&priv->mib_sem);
 510         mgt_commit(priv);
 511         up_write(&priv->mib_sem);
 512
 513         islpci_set_state(priv, PRV_STATE_READY);
 514
 515         return 0;
 516 }
 517
 518 int
 519 islpci_reset(islpci_private *priv, int reload_firmware)
 520 {
 521         isl38xx_control_block *cb =    /* volatile not needed */
 522                 (isl38xx_control_block *) priv->control_block;
 523         unsigned counter;
 524         int rc;
 525
 526         if (reload_firmware)
 527                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 528         else
 529                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 530
 531         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 532
 533         /* disable all device interrupts in case they weren't */
 534         isl38xx_disable_interrupts(priv->device_base);
 535
 536         /* flush all management queues */
 537         priv->index_mgmt_tx = 0;
 538         priv->index_mgmt_rx = 0;
 539
 540         /* clear the indexes in the frame pointer */
 541         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 542                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 543                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 544         }
 545
 546         /* reset the mgmt receive queue */
 547         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 548                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 549                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 550                 frag->flags = 0;
 551                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 552         }
 553
 554         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 555                 cb->rx_data_low[counter].address =
 556                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 557         }
 558
 559         /* since the receive queues are filled with empty fragments, now we can
 560          * set the corresponding indexes in the Control Block */
 561         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 562             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 563         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 564             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 565
 566         /* reset the remaining real index registers and full flags */
 567         priv->free_data_rx = 0;
 568         priv->free_data_tx = 0;
 569         priv->data_low_tx_full = 0;
 570
 571         if (reload_firmware) { /* Should we load the firmware ? */
 572         /* now that the data structures are cleaned up, upload
 573          * firmware and reset interface */
 574                 rc = islpci_upload_fw(priv);
 575                 if (rc)
 576                         return rc;
 577         }
 578
 579         /* finally reset interface */
 580         rc = islpci_reset_if(priv);
 581         if (!rc) /* If successful */
 582                 return rc;
 583
 584         printk(KERN_DEBUG  "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 585         return rc;
 586
 587 }
 588
 589 struct net_device_stats *
 590 islpci_statistics(struct net_device *ndev)
 591 {
 592         islpci_private *priv = netdev_priv(ndev);
 593
 594 #if VERBOSE > SHOW_ERROR_MESSAGES
 595         DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics \n");
 596 #endif
 597
 598         return &priv->statistics;
 599 }
 600
 601 /******************************************************************************
 602     Network device configuration functions
 603 ******************************************************************************/
 604 int
 605 islpci_alloc_memory(islpci_private *priv)
 606 {
 607         int counter;
 608
 609 #if VERBOSE > SHOW_ERROR_MESSAGES
 610         printk(KERN_DEBUG "islpci_alloc_memory\n");
 611 #endif
 612
 613         /* remap the PCI device base address to accessable */
 614         if (!(priv->device_base =
 615               ioremap(pci_resource_start(priv->pdev, 0),
 616                       ISL38XX_PCI_MEM_SIZE))) {
 617                 /* error in remapping the PCI device memory address range */
 618                 printk(KERN_ERR "PCI memory remapping failed \n");
 619                 return -1;
 620         }
 621
 622         /* memory layout for consistent DMA region:
 623          *
 624          * Area 1: Control Block for the device interface
 625          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 626          *         the number of supported stations in the AP determines the minimal
 627          *         size of the buffer !
 628          */
 629
 630         /* perform the allocation */
 631         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 632                                                         HOST_MEM_BLOCK,
 633                                                         &priv->
 634                                                         device_host_address);
 635
 636         if (!priv->driver_mem_address) {
 637                 /* error allocating the block of PCI memory */
 638                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 639                        "prism54");
 640                 return -1;
 641         }
 642
 643         /* assign the Control Block to the first address of the allocated area */
 644         priv->control_block =
 645             (isl38xx_control_block *) priv->driver_mem_address;
 646
 647         /* set the Power Save Buffer pointer directly behind the CB */
 648         priv->device_psm_buffer =
 649                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 650
 651         /* make sure all buffer pointers are initialized */
 652         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 653                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 654                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 655         }
 656
 657         priv->index_mgmt_rx = 0;
 658         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 659         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 660
 661         /* allocate rx queue for management frames */
 662         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 663                 goto out_free;
 664
 665         /* now get the data rx skb's */
 666         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 667         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 668
 669         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 670                 struct sk_buff *skb;
 671
 672                 /* allocate an sk_buff for received data frames storage
 673                  * each frame on receive size consists of 1 fragment
 674                  * include any required allignment operations */
 675                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 676                         /* error allocating an sk_buff structure elements */
 677                         printk(KERN_ERR "Error allocating skb.\n");
 678                         skb = NULL;
 679                         goto out_free;
 680                 }
 681                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 682                 /* add the new allocated sk_buff to the buffer array */
 683                 priv->data_low_rx[counter] = skb;
 684
 685                 /* map the allocated skb data area to pci */
 686                 priv->pci_map_rx_address[counter] =
 687                     pci_map_single(priv->pdev, (void *) skb->data,
 688                                    MAX_FRAGMENT_SIZE_RX + 2,
 689                                    PCI_DMA_FROMDEVICE);
 690                 if (!priv->pci_map_rx_address[counter]) {
 691                         /* error mapping the buffer to device
 692                            accessable memory address */
 693                         printk(KERN_ERR "failed to map skb DMA'able\n");
 694                         goto out_free;
 695                 }
 696         }
 697
 698         prism54_acl_init(&priv->acl);
 699         prism54_wpa_ie_init(priv);
 700         if (mgt_init(priv))
 701                 goto out_free;
 702
 703         return 0;
 704  out_free:
 705         islpci_free_memory(priv);
 706         return -1;
 707 }
 708
 709 int
 710 islpci_free_memory(islpci_private *priv)
 711 {
 712         int counter;
 713
 714         if (priv->device_base)
 715                 iounmap(priv->device_base);
 716         priv->device_base = 0;
 717
 718         /* free consistent DMA area... */
 719         if (priv->driver_mem_address)
 720                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 721                                     priv->driver_mem_address,
 722                                     priv->device_host_address);
 723
 724         /* clear some dangling pointers */
 725         priv->driver_mem_address = 0;
 726         priv->device_host_address = 0;
 727         priv->device_psm_buffer = 0;
 728         priv->control_block = 0;
 729
 730         /* clean up mgmt rx buffers */
 731         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 732                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 733                 if (buf->pci_addr)
 734                         pci_unmap_single(priv->pdev, buf->pci_addr,
 735                                          buf->size, PCI_DMA_FROMDEVICE);
 736                 buf->pci_addr = 0;
 737                 if (buf->mem)
 738                         kfree(buf->mem);
 739                 buf->size = 0;
 740                 buf->mem = NULL;
 741         }
 742
 743         /* clean up data rx buffers */
 744         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 745                 if (priv->pci_map_rx_address[counter])
 746                         pci_unmap_single(priv->pdev,
 747                                          priv->pci_map_rx_address[counter],
 748                                          MAX_FRAGMENT_SIZE_RX + 2,
 749                                          PCI_DMA_FROMDEVICE);
 750                 priv->pci_map_rx_address[counter] = 0;
 751
 752                 if (priv->data_low_rx[counter])
 753                         dev_kfree_skb(priv->data_low_rx[counter]);
 754                 priv->data_low_rx[counter] = 0;
 755         }
 756
 757         /* Free the acces control list and the WPA list */
 758         prism54_acl_clean(&priv->acl);
 759         prism54_wpa_ie_clean(priv);
 760         mgt_clean(priv);
 761
 762         return 0;
 763 }
 764
 765 #if 0
 766 static void
 767 islpci_set_multicast_list(struct net_device *dev)
 768 {
 769         /* put device into promisc mode and let network layer handle it */
 770 }
 771 #endif
 772
 773 struct net_device *
 774 islpci_setup(struct pci_dev *pdev)
 775 {
 776         islpci_private *priv;
 777         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 778
 779         if (!ndev)
 780                 return ndev;
 781
 782         SET_MODULE_OWNER(ndev);
 783         pci_set_drvdata(pdev, ndev);
 784 #if defined(SET_NETDEV_DEV)
 785         SET_NETDEV_DEV(ndev, &pdev->dev);
 786 #endif
 787
 788         /* setup the structure members */
 789         ndev->base_addr = pci_resource_start(pdev, 0);
 790         ndev->irq = pdev->irq;
 791
 792         /* initialize the function pointers */
 793         ndev->open = &islpci_open;
 794         ndev->stop = &islpci_close;
 795         ndev->get_stats = &islpci_statistics;
 796         ndev->get_wireless_stats = &prism54_get_wireless_stats;
 797         ndev->do_ioctl = &prism54_ioctl;
 798         ndev->wireless_handlers =
 799             (struct iw_handler_def *) &prism54_handler_def;
 800
 801         ndev->hard_start_xmit = &islpci_eth_transmit;
 802         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 803         ndev->addr_len = ETH_ALEN;
 804         ndev->set_mac_address = &prism54_set_mac_address;
 805         /* Get a non-zero dummy MAC address for nameif. Jean II */
 806         memcpy(ndev->dev_addr, dummy_mac, 6);
 807
 808 #ifdef HAVE_TX_TIMEOUT
 809         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 810         ndev->tx_timeout = &islpci_eth_tx_timeout;
 811 #endif
 812
 813         /* allocate a private device structure to the network device  */
 814         priv = netdev_priv(ndev);
 815         priv->ndev = ndev;
 816         priv->pdev = pdev;
 817         priv->monitor_type = ARPHRD_IEEE80211;
 818         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 819                 priv->monitor_type : ARPHRD_ETHER;
 820
 821         /* save the start and end address of the PCI memory area */
 822         ndev->mem_start = (unsigned long) priv->device_base;
 823         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 824
 825 #if VERBOSE > SHOW_ERROR_MESSAGES
 826         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 827 #endif
 828
 829         init_waitqueue_head(&priv->reset_done);
 830
 831         /* init the queue read locks, process wait counter */
 832         sema_init(&priv->mgmt_sem, 1);
 833         priv->mgmt_received = NULL;
 834         init_waitqueue_head(&priv->mgmt_wqueue);
 835         sema_init(&priv->stats_sem, 1);
 836         spin_lock_init(&priv->slock);
 837
 838         /* init state machine with off#1 state */
 839         priv->state = PRV_STATE_OFF;
 840         priv->state_off = 1;
 841
 842         /* initialize workqueue's */
 843         INIT_WORK(&priv->stats_work,
 844                   (void (*)(void *)) prism54_update_stats, priv);
 845         priv->stats_timestamp = 0;
 846
 847         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake, priv);
 848         priv->reset_task_pending = 0;
 849
 850         /* allocate various memory areas */
 851         if (islpci_alloc_memory(priv))
 852                 goto do_free_netdev;
 853
 854         /* select the firmware file depending on the device id */
 855         switch (pdev->device) {
 856         case PCIDEVICE_ISL3890:
 857         case PCIDEVICE_3COM6001:
 858                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 859                 break;
 860         case PCIDEVICE_ISL3877:
 861                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 862                 break;
 863
 864         default:
 865                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 866                 break;
 867         }
 868
 869         if (register_netdev(ndev)) {
 870                 DEBUG(SHOW_ERROR_MESSAGES,
 871                       "ERROR: register_netdev() failed \n");
 872                 goto do_islpci_free_memory;
 873         }
 874
 875         return ndev;
 876
 877       do_islpci_free_memory:
 878         islpci_free_memory(priv);
 879       do_free_netdev:
 880         pci_set_drvdata(pdev, 0);
 881         free_netdev(ndev);
 882         priv = 0;
 883         return NULL;
 884 }
 885
 886 islpci_state_t
 887 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 888 {
 889         islpci_state_t old_state;
 890
 891         /* lock */
 892         old_state = priv->state;
 893
 894         /* this means either a race condition or some serious error in
 895          * the driver code */
 896         switch (new_state) {
 897         case PRV_STATE_OFF:
 898                 priv->state_off++;
 899         default:
 900                 priv->state = new_state;
 901                 break;
 902
 903         case PRV_STATE_PREBOOT:
 904                 /* there are actually many off-states, enumerated by
 905                  * state_off */
 906                 if (old_state == PRV_STATE_OFF)
 907                         priv->state_off--;
 908
 909                 /* only if hw_unavailable is zero now it means we either
 910                  * were in off#1 state, or came here from
 911                  * somewhere else */
 912                 if (!priv->state_off)
 913                         priv->state = new_state;
 914                 break;
 915         };
 916 #if 0
 917         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 918                priv->ndev->name, old_state, new_state, priv->state_off);
 919 #endif
 920
 921         /* invariants */
 922         BUG_ON(priv->state_off < 0);
 923         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 924         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 925
 926         /* unlock */
 927         return old_state;
 928 }