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 ISL3886_IMAGE_FILE      "isl3886"
  43 #define ISL3890_IMAGE_FILE      "isl3890"
  44
  45 static int prism54_bring_down(islpci_private *);
  46 static int islpci_alloc_memory(islpci_private *);
  47 static struct net_device_stats *islpci_statistics(struct net_device *);
  48
  49 /* Temporary dummy MAC address to use until firmware is loaded.
  50  * The idea there is that some tools (such as nameif) may query
  51  * the MAC address before the netdev is 'open'. By using a valid
  52  * OUI prefix, they can process the netdev properly.
  53  * Of course, this is not the final/real MAC address. It doesn't
  54  * matter, as you are suppose to be able to change it anytime via
  55  * ndev->set_mac_address. Jean II */
  56 static const unsigned char      dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  57
  58 static int
  59 isl_upload_firmware(islpci_private *priv)
  60 {
  61         u32 reg, rc;
  62         void __iomem *device_base = priv->device_base;
  63
  64         /* clear the RAMBoot and the Reset bit */
  65         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  66         reg &= ~ISL38XX_CTRL_STAT_RESET;
  67         reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  68         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  69         wmb();
  70         udelay(ISL38XX_WRITEIO_DELAY);
  71
  72         /* set the Reset bit without reading the register ! */
  73         reg |= ISL38XX_CTRL_STAT_RESET;
  74         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  75         wmb();
  76         udelay(ISL38XX_WRITEIO_DELAY);
  77
  78         /* clear the Reset bit */
  79         reg &= ~ISL38XX_CTRL_STAT_RESET;
  80         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  81         wmb();
  82
  83         /* wait a while for the device to reboot */
  84         mdelay(50);
  85
  86         {
  87                 const struct firmware *fw_entry = NULL;
  88                 long fw_len;
  89                 const u32 *fw_ptr;
  90
  91                 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  92                 if (rc) {
  93                         printk(KERN_ERR
  94                                "%s: request_firmware() failed for '%s'\n",
  95                                "prism54", priv->firmware);
  96                         return rc;
  97                 }
  98                 /* prepare the Direct Memory Base register */
  99                 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
 100
 101                 fw_ptr = (u32 *) fw_entry->data;
 102                 fw_len = fw_entry->size;
 103
 104                 if (fw_len % 4) {
 105                         printk(KERN_ERR
 106                                "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
 107                                "prism54", priv->firmware);
 108                         release_firmware(fw_entry);
 109                         return -EILSEQ; /* Illegal byte sequence  */;
 110                 }
 111
 112                 while (fw_len > 0) {
 113                         long _fw_len =
 114                             (fw_len >
 115                              ISL38XX_MEMORY_WINDOW_SIZE) ?
 116                             ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 117                         u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 118
 119                         /* set the cards base address for writting the data */
 120                         isl38xx_w32_flush(device_base, reg,
 121                                           ISL38XX_DIR_MEM_BASE_REG);
 122                         wmb();  /* be paranoid */
 123
 124                         /* increment the write address for next iteration */
 125                         reg += _fw_len;
 126                         fw_len -= _fw_len;
 127
 128                         /* write the data to the Direct Memory Window 32bit-wise */
 129                         /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 130                         while (_fw_len > 0) {
 131                                 /* use non-swapping writel() */
 132                                 __raw_writel(*fw_ptr, dev_fw_ptr);
 133                                 fw_ptr++, dev_fw_ptr++;
 134                                 _fw_len -= 4;
 135                         }
 136
 137                         /* flush PCI posting */
 138                         (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 139                         wmb();  /* be paranoid again */
 140
 141                         BUG_ON(_fw_len != 0);
 142                 }
 143
 144                 BUG_ON(fw_len != 0);
 145
 146                 /* Firmware version is at offset 40 (also for "newmac") */
 147                 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
 148                        priv->ndev->name, fw_entry->data + 40);
 149
 150                 release_firmware(fw_entry);
 151         }
 152
 153         /* now reset the device
 154          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 155         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 156         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 157         reg &= ~ISL38XX_CTRL_STAT_RESET;
 158         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 159         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 160         wmb();
 161         udelay(ISL38XX_WRITEIO_DELAY);
 162
 163         /* set the reset bit latches the host override and RAMBoot bits
 164          * into the device for operation when the reset bit is reset */
 165         reg |= ISL38XX_CTRL_STAT_RESET;
 166         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 167         /* don't do flush PCI posting here! */
 168         wmb();
 169         udelay(ISL38XX_WRITEIO_DELAY);
 170
 171         /* clear the reset bit should start the whole circus */
 172         reg &= ~ISL38XX_CTRL_STAT_RESET;
 173         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 174         /* don't do flush PCI posting here! */
 175         wmb();
 176         udelay(ISL38XX_WRITEIO_DELAY);
 177
 178         return 0;
 179 }
 180
 181 /******************************************************************************
 182     Device Interrupt Handler
 183 ******************************************************************************/
 184
 185 irqreturn_t
 186 islpci_interrupt(int irq, void *config, struct pt_regs *regs)
 187 {
 188         u32 reg;
 189         islpci_private *priv = config;
 190         struct net_device *ndev = priv->ndev;
 191         void __iomem *device = priv->device_base;
 192         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 193
 194         /* lock the interrupt handler */
 195         spin_lock(&priv->slock);
 196
 197         /* received an interrupt request on a shared IRQ line
 198          * first check whether the device is in sleep mode */
 199         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 200         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 201                 /* device is in sleep mode, IRQ was generated by someone else */
 202         {
 203 #if VERBOSE > SHOW_ERROR_MESSAGES
 204                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 205 #endif
 206                 spin_unlock(&priv->slock);
 207                 return IRQ_NONE;
 208         }
 209
 210
 211         /* check whether there is any source of interrupt on the device */
 212         reg = readl(device + ISL38XX_INT_IDENT_REG);
 213
 214         /* also check the contents of the Interrupt Enable Register, because this
 215          * will filter out interrupt sources from other devices on the same irq ! */
 216         reg &= readl(device + ISL38XX_INT_EN_REG);
 217         reg &= ISL38XX_INT_SOURCES;
 218
 219         if (reg != 0) {
 220                 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 221                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 222
 223                 /* reset the request bits in the Identification register */
 224                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 225
 226 #if VERBOSE > SHOW_ERROR_MESSAGES
 227                 DEBUG(SHOW_FUNCTION_CALLS,
 228                       "IRQ: Identification register 0x%p 0x%x \n", device, reg);
 229 #endif
 230
 231                 /* check for each bit in the register separately */
 232                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 233 #if VERBOSE > SHOW_ERROR_MESSAGES
 234                         /* Queue has been updated */
 235                         DEBUG(SHOW_TRACING, "IRQ: Update flag \n");
 236
 237                         DEBUG(SHOW_QUEUE_INDEXES,
 238                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 239                               le32_to_cpu(priv->control_block->
 240                                           driver_curr_frag[0]),
 241                               le32_to_cpu(priv->control_block->
 242                                           driver_curr_frag[1]),
 243                               le32_to_cpu(priv->control_block->
 244                                           driver_curr_frag[2]),
 245                               le32_to_cpu(priv->control_block->
 246                                           driver_curr_frag[3]),
 247                               le32_to_cpu(priv->control_block->
 248                                           driver_curr_frag[4]),
 249                               le32_to_cpu(priv->control_block->
 250                                           driver_curr_frag[5])
 251                             );
 252
 253                         DEBUG(SHOW_QUEUE_INDEXES,
 254                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 255                               le32_to_cpu(priv->control_block->
 256                                           device_curr_frag[0]),
 257                               le32_to_cpu(priv->control_block->
 258                                           device_curr_frag[1]),
 259                               le32_to_cpu(priv->control_block->
 260                                           device_curr_frag[2]),
 261                               le32_to_cpu(priv->control_block->
 262                                           device_curr_frag[3]),
 263                               le32_to_cpu(priv->control_block->
 264                                           device_curr_frag[4]),
 265                               le32_to_cpu(priv->control_block->
 266                                           device_curr_frag[5])
 267                             );
 268 #endif
 269
 270                         /* cleanup the data low transmit queue */
 271                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 272
 273                         /* device is in active state, update the
 274                          * powerstate flag if necessary */
 275                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 276
 277                         /* check all three queues in priority order
 278                          * call the PIMFOR receive function until the
 279                          * queue is empty */
 280                         if (isl38xx_in_queue(priv->control_block,
 281                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 282 #if VERBOSE > SHOW_ERROR_MESSAGES
 283                                 DEBUG(SHOW_TRACING,
 284                                       "Received frame in Management Queue\n");
 285 #endif
 286                                 islpci_mgt_receive(ndev);
 287
 288                                 islpci_mgt_cleanup_transmit(ndev);
 289
 290                                 /* Refill slots in receive queue */
 291                                 islpci_mgmt_rx_fill(ndev);
 292
 293                                 /* no need to trigger the device, next
 294                                    islpci_mgt_transaction does it */
 295                         }
 296
 297                         while (isl38xx_in_queue(priv->control_block,
 298                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 299 #if VERBOSE > SHOW_ERROR_MESSAGES
 300                                 DEBUG(SHOW_TRACING,
 301                                       "Received frame in Data Low Queue \n");
 302 #endif
 303                                 islpci_eth_receive(priv);
 304                         }
 305
 306                         /* check whether the data transmit queues were full */
 307                         if (priv->data_low_tx_full) {
 308                                 /* check whether the transmit is not full anymore */
 309                                 if (ISL38XX_CB_TX_QSIZE -
 310                                     isl38xx_in_queue(priv->control_block,
 311                                                      ISL38XX_CB_TX_DATA_LQ) >=
 312                                     ISL38XX_MIN_QTHRESHOLD) {
 313                                         /* nope, the driver is ready for more network frames */
 314                                         netif_wake_queue(priv->ndev);
 315
 316                                         /* reset the full flag */
 317                                         priv->data_low_tx_full = 0;
 318                                 }
 319                         }
 320                 }
 321
 322                 if (reg & ISL38XX_INT_IDENT_INIT) {
 323                         /* Device has been initialized */
 324 #if VERBOSE > SHOW_ERROR_MESSAGES
 325                         DEBUG(SHOW_TRACING,
 326                               "IRQ: Init flag, device initialized \n");
 327 #endif
 328                         wake_up(&priv->reset_done);
 329                 }
 330
 331                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 332                         /* Device intends to move to powersave state */
 333 #if VERBOSE > SHOW_ERROR_MESSAGES
 334                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n");
 335 #endif
 336                         isl38xx_handle_sleep_request(priv->control_block,
 337                                                      &powerstate,
 338                                                      priv->device_base);
 339                 }
 340
 341                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 342                         /* Device has been woken up to active state */
 343 #if VERBOSE > SHOW_ERROR_MESSAGES
 344                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n");
 345 #endif
 346
 347                         isl38xx_handle_wakeup(priv->control_block,
 348                                               &powerstate, priv->device_base);
 349                 }
 350         } else {
 351 #if VERBOSE > SHOW_ERROR_MESSAGES
 352                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 353 #endif
 354                 spin_unlock(&priv->slock);
 355                 return IRQ_NONE;
 356         }
 357
 358         /* sleep -> ready */
 359         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 360             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 361                 islpci_set_state(priv, PRV_STATE_READY);
 362
 363         /* !sleep -> sleep */
 364         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 365             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 366                 islpci_set_state(priv, PRV_STATE_SLEEP);
 367
 368         /* unlock the interrupt handler */
 369         spin_unlock(&priv->slock);
 370
 371         return IRQ_HANDLED;
 372 }
 373
 374 /******************************************************************************
 375     Network Interface Control & Statistical functions
 376 ******************************************************************************/
 377 static int
 378 islpci_open(struct net_device *ndev)
 379 {
 380         u32 rc;
 381         islpci_private *priv = netdev_priv(ndev);
 382
 383         /* reset data structures, upload firmware and reset device */
 384         rc = islpci_reset(priv,1);
 385         if (rc) {
 386                 prism54_bring_down(priv);
 387                 return rc; /* Returns informative message */
 388         }
 389
 390         netif_start_queue(ndev);
 391 /*      netif_mark_up( ndev ); */
 392
 393         return 0;
 394 }
 395
 396 static int
 397 islpci_close(struct net_device *ndev)
 398 {
 399         islpci_private *priv = netdev_priv(ndev);
 400
 401         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 402
 403         netif_stop_queue(ndev);
 404
 405         return prism54_bring_down(priv);
 406 }
 407
 408 static int
 409 prism54_bring_down(islpci_private *priv)
 410 {
 411         void __iomem *device_base = priv->device_base;
 412         u32 reg;
 413         /* we are going to shutdown the device */
 414         islpci_set_state(priv, PRV_STATE_PREBOOT);
 415
 416         /* disable all device interrupts in case they weren't */
 417         isl38xx_disable_interrupts(priv->device_base);
 418
 419         /* For safety reasons, we may want to ensure that no DMA transfer is
 420          * currently in progress by emptying the TX and RX queues. */
 421
 422         /* wait until interrupts have finished executing on other CPUs */
 423         synchronize_irq(priv->pdev->irq);
 424
 425         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 426         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 427         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 428         wmb();
 429         udelay(ISL38XX_WRITEIO_DELAY);
 430
 431         reg |= ISL38XX_CTRL_STAT_RESET;
 432         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 433         wmb();
 434         udelay(ISL38XX_WRITEIO_DELAY);
 435
 436         /* clear the Reset bit */
 437         reg &= ~ISL38XX_CTRL_STAT_RESET;
 438         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 439         wmb();
 440
 441         /* wait a while for the device to reset */
 442         set_current_state(TASK_UNINTERRUPTIBLE);
 443         schedule_timeout(50*HZ/1000);
 444
 445         return 0;
 446 }
 447
 448 static int
 449 islpci_upload_fw(islpci_private *priv)
 450 {
 451         islpci_state_t old_state;
 452         u32 rc;
 453
 454         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 455
 456         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 457
 458         rc = isl_upload_firmware(priv);
 459         if (rc) {
 460                 /* error uploading the firmware */
 461                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 462                        priv->ndev->name, priv->firmware);
 463
 464                 islpci_set_state(priv, old_state);
 465                 return rc;
 466         }
 467
 468         printk(KERN_DEBUG "%s: firmware upload complete\n",
 469                priv->ndev->name);
 470
 471         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 472
 473         return 0;
 474 }
 475
 476 static int
 477 islpci_reset_if(islpci_private *priv)
 478 {
 479         long remaining;
 480         int result = -ETIME;
 481         int count;
 482
 483         DEFINE_WAIT(wait);
 484         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 485
 486         /* now the last step is to reset the interface */
 487         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 488         islpci_set_state(priv, PRV_STATE_PREINIT);
 489
 490         for(count = 0; count < 2 && result; count++) {
 491                 /* The software reset acknowledge needs about 220 msec here.
 492                  * Be conservative and wait for up to one second. */
 493
 494                 set_current_state(TASK_UNINTERRUPTIBLE);
 495                 remaining = schedule_timeout(HZ);
 496
 497                 if(remaining > 0) {
 498                         result = 0;
 499                         break;
 500                 }
 501
 502                 /* If we're here it's because our IRQ hasn't yet gone through.
 503                  * Retry a bit more...
 504                  */
 505                 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
 506                         priv->ndev->name);
 507         }
 508
 509         finish_wait(&priv->reset_done, &wait);
 510
 511         if (result) {
 512                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 513                 return result;
 514         }
 515
 516         islpci_set_state(priv, PRV_STATE_INIT);
 517
 518         /* Now that the device is 100% up, let's allow
 519          * for the other interrupts --
 520          * NOTE: this is not *yet* true since we've only allowed the
 521          * INIT interrupt on the IRQ line. We can perhaps poll
 522          * the IRQ line until we know for sure the reset went through */
 523         isl38xx_enable_common_interrupts(priv->device_base);
 524
 525         down_write(&priv->mib_sem);
 526         result = mgt_commit(priv);
 527         if (result) {
 528                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 529                 up_write(&priv->mib_sem);
 530                 return result;
 531         }
 532         up_write(&priv->mib_sem);
 533
 534         islpci_set_state(priv, PRV_STATE_READY);
 535
 536         printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
 537         return 0;
 538 }
 539
 540 int
 541 islpci_reset(islpci_private *priv, int reload_firmware)
 542 {
 543         isl38xx_control_block *cb =    /* volatile not needed */
 544                 (isl38xx_control_block *) priv->control_block;
 545         unsigned counter;
 546         int rc;
 547
 548         if (reload_firmware)
 549                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 550         else
 551                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 552
 553         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 554
 555         /* disable all device interrupts in case they weren't */
 556         isl38xx_disable_interrupts(priv->device_base);
 557
 558         /* flush all management queues */
 559         priv->index_mgmt_tx = 0;
 560         priv->index_mgmt_rx = 0;
 561
 562         /* clear the indexes in the frame pointer */
 563         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 564                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 565                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 566         }
 567
 568         /* reset the mgmt receive queue */
 569         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 570                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 571                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 572                 frag->flags = 0;
 573                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 574         }
 575
 576         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 577                 cb->rx_data_low[counter].address =
 578                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 579         }
 580
 581         /* since the receive queues are filled with empty fragments, now we can
 582          * set the corresponding indexes in the Control Block */
 583         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 584             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 585         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 586             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 587
 588         /* reset the remaining real index registers and full flags */
 589         priv->free_data_rx = 0;
 590         priv->free_data_tx = 0;
 591         priv->data_low_tx_full = 0;
 592
 593         if (reload_firmware) { /* Should we load the firmware ? */
 594         /* now that the data structures are cleaned up, upload
 595          * firmware and reset interface */
 596                 rc = islpci_upload_fw(priv);
 597                 if (rc) {
 598                         printk(KERN_ERR "%s: islpci_reset: failure\n",
 599                                 priv->ndev->name);
 600                         return rc;
 601                 }
 602         }
 603
 604         /* finally reset interface */
 605         rc = islpci_reset_if(priv);
 606         if (rc)
 607                 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 608         return rc;
 609 }
 610
 611 static struct net_device_stats *
 612 islpci_statistics(struct net_device *ndev)
 613 {
 614         islpci_private *priv = netdev_priv(ndev);
 615
 616 #if VERBOSE > SHOW_ERROR_MESSAGES
 617         DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics\n");
 618 #endif
 619
 620         return &priv->statistics;
 621 }
 622
 623 /******************************************************************************
 624     Network device configuration functions
 625 ******************************************************************************/
 626 static int
 627 islpci_alloc_memory(islpci_private *priv)
 628 {
 629         int counter;
 630
 631 #if VERBOSE > SHOW_ERROR_MESSAGES
 632         printk(KERN_DEBUG "islpci_alloc_memory\n");
 633 #endif
 634
 635         /* remap the PCI device base address to accessable */
 636         if (!(priv->device_base =
 637               ioremap(pci_resource_start(priv->pdev, 0),
 638                       ISL38XX_PCI_MEM_SIZE))) {
 639                 /* error in remapping the PCI device memory address range */
 640                 printk(KERN_ERR "PCI memory remapping failed \n");
 641                 return -1;
 642         }
 643
 644         /* memory layout for consistent DMA region:
 645          *
 646          * Area 1: Control Block for the device interface
 647          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 648          *         the number of supported stations in the AP determines the minimal
 649          *         size of the buffer !
 650          */
 651
 652         /* perform the allocation */
 653         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 654                                                         HOST_MEM_BLOCK,
 655                                                         &priv->
 656                                                         device_host_address);
 657
 658         if (!priv->driver_mem_address) {
 659                 /* error allocating the block of PCI memory */
 660                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 661                        "prism54");
 662                 return -1;
 663         }
 664
 665         /* assign the Control Block to the first address of the allocated area */
 666         priv->control_block =
 667             (isl38xx_control_block *) priv->driver_mem_address;
 668
 669         /* set the Power Save Buffer pointer directly behind the CB */
 670         priv->device_psm_buffer =
 671                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 672
 673         /* make sure all buffer pointers are initialized */
 674         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 675                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 676                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 677         }
 678
 679         priv->index_mgmt_rx = 0;
 680         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 681         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 682
 683         /* allocate rx queue for management frames */
 684         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 685                 goto out_free;
 686
 687         /* now get the data rx skb's */
 688         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 689         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 690
 691         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 692                 struct sk_buff *skb;
 693
 694                 /* allocate an sk_buff for received data frames storage
 695                  * each frame on receive size consists of 1 fragment
 696                  * include any required allignment operations */
 697                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 698                         /* error allocating an sk_buff structure elements */
 699                         printk(KERN_ERR "Error allocating skb.\n");
 700                         skb = NULL;
 701                         goto out_free;
 702                 }
 703                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 704                 /* add the new allocated sk_buff to the buffer array */
 705                 priv->data_low_rx[counter] = skb;
 706
 707                 /* map the allocated skb data area to pci */
 708                 priv->pci_map_rx_address[counter] =
 709                     pci_map_single(priv->pdev, (void *) skb->data,
 710                                    MAX_FRAGMENT_SIZE_RX + 2,
 711                                    PCI_DMA_FROMDEVICE);
 712                 if (!priv->pci_map_rx_address[counter]) {
 713                         /* error mapping the buffer to device
 714                            accessable memory address */
 715                         printk(KERN_ERR "failed to map skb DMA'able\n");
 716                         goto out_free;
 717                 }
 718         }
 719
 720         prism54_acl_init(&priv->acl);
 721         prism54_wpa_ie_init(priv);
 722         if (mgt_init(priv))
 723                 goto out_free;
 724
 725         return 0;
 726  out_free:
 727         islpci_free_memory(priv);
 728         return -1;
 729 }
 730
 731 int
 732 islpci_free_memory(islpci_private *priv)
 733 {
 734         int counter;
 735
 736         if (priv->device_base)
 737                 iounmap(priv->device_base);
 738         priv->device_base = NULL;
 739
 740         /* free consistent DMA area... */
 741         if (priv->driver_mem_address)
 742                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 743                                     priv->driver_mem_address,
 744                                     priv->device_host_address);
 745
 746         /* clear some dangling pointers */
 747         priv->driver_mem_address = NULL;
 748         priv->device_host_address = 0;
 749         priv->device_psm_buffer = 0;
 750         priv->control_block = NULL;
 751
 752         /* clean up mgmt rx buffers */
 753         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 754                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 755                 if (buf->pci_addr)
 756                         pci_unmap_single(priv->pdev, buf->pci_addr,
 757                                          buf->size, PCI_DMA_FROMDEVICE);
 758                 buf->pci_addr = 0;
 759                 if (buf->mem)
 760                         kfree(buf->mem);
 761                 buf->size = 0;
 762                 buf->mem = NULL;
 763         }
 764
 765         /* clean up data rx buffers */
 766         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 767                 if (priv->pci_map_rx_address[counter])
 768                         pci_unmap_single(priv->pdev,
 769                                          priv->pci_map_rx_address[counter],
 770                                          MAX_FRAGMENT_SIZE_RX + 2,
 771                                          PCI_DMA_FROMDEVICE);
 772                 priv->pci_map_rx_address[counter] = 0;
 773
 774                 if (priv->data_low_rx[counter])
 775                         dev_kfree_skb(priv->data_low_rx[counter]);
 776                 priv->data_low_rx[counter] = NULL;
 777         }
 778
 779         /* Free the acces control list and the WPA list */
 780         prism54_acl_clean(&priv->acl);
 781         prism54_wpa_ie_clean(priv);
 782         mgt_clean(priv);
 783
 784         return 0;
 785 }
 786
 787 #if 0
 788 static void
 789 islpci_set_multicast_list(struct net_device *dev)
 790 {
 791         /* put device into promisc mode and let network layer handle it */
 792 }
 793 #endif
 794
 795 struct net_device *
 796 islpci_setup(struct pci_dev *pdev)
 797 {
 798         islpci_private *priv;
 799         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 800
 801         if (!ndev)
 802                 return ndev;
 803
 804         SET_MODULE_OWNER(ndev);
 805         pci_set_drvdata(pdev, ndev);
 806 #if defined(SET_NETDEV_DEV)
 807         SET_NETDEV_DEV(ndev, &pdev->dev);
 808 #endif
 809
 810         /* setup the structure members */
 811         ndev->base_addr = pci_resource_start(pdev, 0);
 812         ndev->irq = pdev->irq;
 813
 814         /* initialize the function pointers */
 815         ndev->open = &islpci_open;
 816         ndev->stop = &islpci_close;
 817         ndev->get_stats = &islpci_statistics;
 818         ndev->do_ioctl = &prism54_ioctl;
 819         ndev->wireless_handlers =
 820             (struct iw_handler_def *) &prism54_handler_def;
 821
 822         ndev->hard_start_xmit = &islpci_eth_transmit;
 823         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 824         ndev->addr_len = ETH_ALEN;
 825         ndev->set_mac_address = &prism54_set_mac_address;
 826         /* Get a non-zero dummy MAC address for nameif. Jean II */
 827         memcpy(ndev->dev_addr, dummy_mac, 6);
 828
 829 #ifdef HAVE_TX_TIMEOUT
 830         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 831         ndev->tx_timeout = &islpci_eth_tx_timeout;
 832 #endif
 833
 834         /* allocate a private device structure to the network device  */
 835         priv = netdev_priv(ndev);
 836         priv->ndev = ndev;
 837         priv->pdev = pdev;
 838         priv->monitor_type = ARPHRD_IEEE80211;
 839         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 840                 priv->monitor_type : ARPHRD_ETHER;
 841
 842 #if WIRELESS_EXT > 16
 843         /* Add pointers to enable iwspy support. */
 844         priv->wireless_data.spy_data = &priv->spy_data;
 845         ndev->wireless_data = &priv->wireless_data;
 846 #else  /* WIRELESS_EXT > 16 */
 847         ndev->get_wireless_stats = &prism54_get_wireless_stats;
 848 #endif /* WIRELESS_EXT > 16 */
 849
 850         /* save the start and end address of the PCI memory area */
 851         ndev->mem_start = (unsigned long) priv->device_base;
 852         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 853
 854 #if VERBOSE > SHOW_ERROR_MESSAGES
 855         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 856 #endif
 857
 858         init_waitqueue_head(&priv->reset_done);
 859
 860         /* init the queue read locks, process wait counter */
 861         sema_init(&priv->mgmt_sem, 1);
 862         priv->mgmt_received = NULL;
 863         init_waitqueue_head(&priv->mgmt_wqueue);
 864         sema_init(&priv->stats_sem, 1);
 865         spin_lock_init(&priv->slock);
 866
 867         /* init state machine with off#1 state */
 868         priv->state = PRV_STATE_OFF;
 869         priv->state_off = 1;
 870
 871         /* initialize workqueue's */
 872         INIT_WORK(&priv->stats_work,
 873                   (void (*)(void *)) prism54_update_stats, priv);
 874         priv->stats_timestamp = 0;
 875
 876         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake, priv);
 877         priv->reset_task_pending = 0;
 878
 879         /* allocate various memory areas */
 880         if (islpci_alloc_memory(priv))
 881                 goto do_free_netdev;
 882
 883         /* select the firmware file depending on the device id */
 884         switch (pdev->device) {
 885         case 0x3877:
 886                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 887                 break;
 888
 889         case 0x3886:
 890                 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 891                 break;
 892
 893         default:
 894                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 895                 break;
 896         }
 897
 898         if (register_netdev(ndev)) {
 899                 DEBUG(SHOW_ERROR_MESSAGES,
 900                       "ERROR: register_netdev() failed \n");
 901                 goto do_islpci_free_memory;
 902         }
 903
 904         return ndev;
 905
 906       do_islpci_free_memory:
 907         islpci_free_memory(priv);
 908       do_free_netdev:
 909         pci_set_drvdata(pdev, NULL);
 910         free_netdev(ndev);
 911         priv = NULL;
 912         return NULL;
 913 }
 914
 915 islpci_state_t
 916 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 917 {
 918         islpci_state_t old_state;
 919
 920         /* lock */
 921         old_state = priv->state;
 922
 923         /* this means either a race condition or some serious error in
 924          * the driver code */
 925         switch (new_state) {
 926         case PRV_STATE_OFF:
 927                 priv->state_off++;
 928         default:
 929                 priv->state = new_state;
 930                 break;
 931
 932         case PRV_STATE_PREBOOT:
 933                 /* there are actually many off-states, enumerated by
 934                  * state_off */
 935                 if (old_state == PRV_STATE_OFF)
 936                         priv->state_off--;
 937
 938                 /* only if hw_unavailable is zero now it means we either
 939                  * were in off#1 state, or came here from
 940                  * somewhere else */
 941                 if (!priv->state_off)
 942                         priv->state = new_state;
 943                 break;
 944         };
 945 #if 0
 946         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 947                priv->ndev->name, old_state, new_state, priv->state_off);
 948 #endif
 949
 950         /* invariants */
 951         BUG_ON(priv->state_off < 0);
 952         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 953         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 954
 955         /* unlock */
 956         return old_state;
 957 }