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 static int prism54_bring_down(islpci_private *);
  45 static int islpci_alloc_memory(islpci_private *);
  46
  47 /* Temporary dummy MAC address to use until firmware is loaded.
  48  * The idea there is that some tools (such as nameif) may query
  49  * the MAC address before the netdev is 'open'. By using a valid
  50  * OUI prefix, they can process the netdev properly.
  51  * Of course, this is not the final/real MAC address. It doesn't
  52  * matter, as you are suppose to be able to change it anytime via
  53  * ndev->set_mac_address. Jean II */
  54 const unsigned char     dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  55
  56 static int
  57 isl_upload_firmware(islpci_private *priv)
  58 {
  59         u32 reg, rc;
  60         void *device_base = priv->device_base;
  61
  62         /* clear the RAMBoot and the Reset bit */
  63         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  64         reg &= ~ISL38XX_CTRL_STAT_RESET;
  65         reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  66         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  67         wmb();
  68         udelay(ISL38XX_WRITEIO_DELAY);
  69
  70         /* set the Reset bit without reading the register ! */
  71         reg |= ISL38XX_CTRL_STAT_RESET;
  72         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  73         wmb();
  74         udelay(ISL38XX_WRITEIO_DELAY);
  75
  76         /* clear the Reset bit */
  77         reg &= ~ISL38XX_CTRL_STAT_RESET;
  78         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  79         wmb();
  80
  81         /* wait a while for the device to reboot */
  82         mdelay(50);
  83
  84         {
  85                 const struct firmware *fw_entry = 0;
  86                 long fw_len;
  87                 const u32 *fw_ptr;
  88
  89                 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  90                 if (rc) {
  91                         printk(KERN_ERR
  92                                "%s: request_firmware() failed for '%s'\n",
  93                                "prism54", priv->firmware);
  94                         return rc;
  95                 }
  96                 /* prepare the Direct Memory Base register */
  97                 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
  98
  99                 fw_ptr = (u32 *) fw_entry->data;
 100                 fw_len = fw_entry->size;
 101
 102                 if (fw_len % 4) {
 103                         printk(KERN_ERR
 104                                "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
 105                                "prism54", priv->firmware);
 106                         release_firmware(fw_entry);
 107                         return EILSEQ; /* Illegal byte sequence  */;
 108                 }
 109
 110                 while (fw_len > 0) {
 111                         long _fw_len =
 112                             (fw_len >
 113                              ISL38XX_MEMORY_WINDOW_SIZE) ?
 114                             ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 115                         u32 *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 116
 117                         /* set the cards base address for writting the data */
 118                         isl38xx_w32_flush(device_base, reg,
 119                                           ISL38XX_DIR_MEM_BASE_REG);
 120                         wmb();  /* be paranoid */
 121
 122                         /* increment the write address for next iteration */
 123                         reg += _fw_len;
 124                         fw_len -= _fw_len;
 125
 126                         /* write the data to the Direct Memory Window 32bit-wise */
 127                         /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 128                         while (_fw_len > 0) {
 129                                 /* use non-swapping writel() */
 130                                 __raw_writel(*fw_ptr, dev_fw_ptr);
 131                                 fw_ptr++, dev_fw_ptr++;
 132                                 _fw_len -= 4;
 133                         }
 134
 135                         /* flush PCI posting */
 136                         (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 137                         wmb();  /* be paranoid again */
 138
 139                         BUG_ON(_fw_len != 0);
 140                 }
 141
 142                 BUG_ON(fw_len != 0);
 143
 144                 release_firmware(fw_entry);
 145         }
 146
 147         /* now reset the device
 148          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 149         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 150         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 151         reg &= ~ISL38XX_CTRL_STAT_RESET;
 152         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 153         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 154         wmb();
 155         udelay(ISL38XX_WRITEIO_DELAY);
 156
 157         /* set the reset bit latches the host override and RAMBoot bits
 158          * into the device for operation when the reset bit is reset */
 159         reg |= ISL38XX_CTRL_STAT_RESET;
 160         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 161         /* don't do flush PCI posting here! */
 162         wmb();
 163         udelay(ISL38XX_WRITEIO_DELAY);
 164
 165         /* clear the reset bit should start the whole circus */
 166         reg &= ~ISL38XX_CTRL_STAT_RESET;
 167         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 168         /* don't do flush PCI posting here! */
 169         wmb();
 170         udelay(ISL38XX_WRITEIO_DELAY);
 171
 172         return 0;
 173 }
 174
 175 /******************************************************************************
 176     Device Interrupt Handler
 177 ******************************************************************************/
 178
 179 irqreturn_t
 180 islpci_interrupt(int irq, void *config, struct pt_regs *regs)
 181 {
 182         u32 reg;
 183         islpci_private *priv = config;
 184         struct net_device *ndev = priv->ndev;
 185         void *device = priv->device_base;
 186         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 187
 188         /* received an interrupt request on a shared IRQ line
 189          * first check whether the device is in sleep mode */
 190         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 191         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 192                 /* device is in sleep mode, IRQ was generated by someone else */
 193         {
 194 #if VERBOSE > SHOW_ERROR_MESSAGES
 195                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 196 #endif
 197                 return IRQ_NONE;
 198         }
 199
 200         if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 201                 powerstate = ISL38XX_PSM_ACTIVE_STATE;
 202
 203         /* lock the interrupt handler */
 204         spin_lock(&priv->slock);
 205
 206         /* check whether there is any source of interrupt on the device */
 207         reg = readl(device + ISL38XX_INT_IDENT_REG);
 208
 209         /* also check the contents of the Interrupt Enable Register, because this
 210          * will filter out interrupt sources from other devices on the same irq ! */
 211         reg &= readl(device + ISL38XX_INT_EN_REG);
 212         reg &= ISL38XX_INT_SOURCES;
 213
 214         if (reg != 0) {
 215                 /* reset the request bits in the Identification register */
 216                 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 217
 218 #if VERBOSE > SHOW_ERROR_MESSAGES
 219                 DEBUG(SHOW_FUNCTION_CALLS,
 220                       "IRQ: Identification register 0x%p 0x%x \n", device, reg);
 221 #endif
 222
 223                 /* check for each bit in the register separately */
 224                 if (reg & ISL38XX_INT_IDENT_UPDATE) {
 225 #if VERBOSE > SHOW_ERROR_MESSAGES
 226                         /* Queue has been updated */
 227                         DEBUG(SHOW_TRACING, "IRQ: Update flag \n");
 228
 229                         DEBUG(SHOW_QUEUE_INDEXES,
 230                               "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 231                               le32_to_cpu(priv->control_block->
 232                                           driver_curr_frag[0]),
 233                               le32_to_cpu(priv->control_block->
 234                                           driver_curr_frag[1]),
 235                               le32_to_cpu(priv->control_block->
 236                                           driver_curr_frag[2]),
 237                               le32_to_cpu(priv->control_block->
 238                                           driver_curr_frag[3]),
 239                               le32_to_cpu(priv->control_block->
 240                                           driver_curr_frag[4]),
 241                               le32_to_cpu(priv->control_block->
 242                                           driver_curr_frag[5])
 243                             );
 244
 245                         DEBUG(SHOW_QUEUE_INDEXES,
 246                               "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 247                               le32_to_cpu(priv->control_block->
 248                                           device_curr_frag[0]),
 249                               le32_to_cpu(priv->control_block->
 250                                           device_curr_frag[1]),
 251                               le32_to_cpu(priv->control_block->
 252                                           device_curr_frag[2]),
 253                               le32_to_cpu(priv->control_block->
 254                                           device_curr_frag[3]),
 255                               le32_to_cpu(priv->control_block->
 256                                           device_curr_frag[4]),
 257                               le32_to_cpu(priv->control_block->
 258                                           device_curr_frag[5])
 259                             );
 260 #endif
 261
 262                         /* cleanup the data low transmit queue */
 263                         islpci_eth_cleanup_transmit(priv, priv->control_block);
 264
 265                         /* device is in active state, update the
 266                          * powerstate flag if necessary */
 267                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 268
 269                         /* check all three queues in priority order
 270                          * call the PIMFOR receive function until the
 271                          * queue is empty */
 272                         if (isl38xx_in_queue(priv->control_block,
 273                                                 ISL38XX_CB_RX_MGMTQ) != 0) {
 274 #if VERBOSE > SHOW_ERROR_MESSAGES
 275                                 DEBUG(SHOW_TRACING,
 276                                       "Received frame in Management Queue\n");
 277 #endif
 278                                 islpci_mgt_receive(ndev);
 279
 280                                 islpci_mgt_cleanup_transmit(ndev);
 281
 282                                 /* Refill slots in receive queue */
 283                                 islpci_mgmt_rx_fill(ndev);
 284
 285                                 /* no need to trigger the device, next
 286                                    islpci_mgt_transaction does it */
 287                         }
 288
 289                         while (isl38xx_in_queue(priv->control_block,
 290                                                 ISL38XX_CB_RX_DATA_LQ) != 0) {
 291 #if VERBOSE > SHOW_ERROR_MESSAGES
 292                                 DEBUG(SHOW_TRACING,
 293                                       "Received frame in Data Low Queue \n");
 294 #endif
 295                                 islpci_eth_receive(priv);
 296                         }
 297
 298                         /* check whether the data transmit queues were full */
 299                         if (priv->data_low_tx_full) {
 300                                 /* check whether the transmit is not full anymore */
 301                                 if (ISL38XX_CB_TX_QSIZE -
 302                                     isl38xx_in_queue(priv->control_block,
 303                                                      ISL38XX_CB_TX_DATA_LQ) >=
 304                                     ISL38XX_MIN_QTHRESHOLD) {
 305                                         /* nope, the driver is ready for more network frames */
 306                                         netif_wake_queue(priv->ndev);
 307
 308                                         /* reset the full flag */
 309                                         priv->data_low_tx_full = 0;
 310                                 }
 311                         }
 312                 }
 313
 314                 if (reg & ISL38XX_INT_IDENT_INIT) {
 315                         /* Device has been initialized */
 316 #if VERBOSE > SHOW_ERROR_MESSAGES
 317                         DEBUG(SHOW_TRACING,
 318                               "IRQ: Init flag, device initialized \n");
 319 #endif
 320                         wake_up(&priv->reset_done);
 321                 }
 322
 323                 if (reg & ISL38XX_INT_IDENT_SLEEP) {
 324                         /* Device intends to move to powersave state */
 325 #if VERBOSE > SHOW_ERROR_MESSAGES
 326                         DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n");
 327 #endif
 328                         isl38xx_handle_sleep_request(priv->control_block,
 329                                                      &powerstate,
 330                                                      priv->device_base);
 331                 }
 332
 333                 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 334                         /* Device has been woken up to active state */
 335 #if VERBOSE > SHOW_ERROR_MESSAGES
 336                         DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n");
 337 #endif
 338
 339                         isl38xx_handle_wakeup(priv->control_block,
 340                                               &powerstate, priv->device_base);
 341                 }
 342         }
 343
 344         /* sleep -> ready */
 345         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 346             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 347                 islpci_set_state(priv, PRV_STATE_READY);
 348
 349         /* !sleep -> sleep */
 350         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 351             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 352                 islpci_set_state(priv, PRV_STATE_SLEEP);
 353
 354         /* unlock the interrupt handler */
 355         spin_unlock(&priv->slock);
 356
 357         return IRQ_HANDLED;
 358 }
 359
 360 /******************************************************************************
 361     Network Interface Control & Statistical functions
 362 ******************************************************************************/
 363 static int
 364 islpci_open(struct net_device *ndev)
 365 {
 366         u32 rc;
 367         islpci_private *priv = netdev_priv(ndev);
 368
 369         printk(KERN_DEBUG "%s: islpci_open()\n", ndev->name);
 370
 371         /* reset data structures, upload firmware and reset device */
 372         rc = islpci_reset(priv,1);
 373         if (rc) {
 374                 prism54_bring_down(priv);
 375                 return rc; /* Returns informative message */
 376         }
 377
 378         netif_start_queue(ndev);
 379 /*      netif_mark_up( ndev ); */
 380
 381         return 0;
 382 }
 383
 384 static int
 385 islpci_close(struct net_device *ndev)
 386 {
 387         islpci_private *priv = netdev_priv(ndev);
 388
 389         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 390
 391         netif_stop_queue(ndev);
 392
 393         return prism54_bring_down(priv);
 394 }
 395
 396 static int
 397 prism54_bring_down(islpci_private *priv)
 398 {
 399         void *device_base = priv->device_base;
 400         u32 reg;
 401         /* we are going to shutdown the device */
 402         islpci_set_state(priv, PRV_STATE_PREBOOT);
 403
 404         /* disable all device interrupts in case they weren't */
 405         isl38xx_disable_interrupts(priv->device_base);
 406
 407         /* For safety reasons, we may want to ensure that no DMA transfer is
 408          * currently in progress by emptying the TX and RX queues. */
 409
 410         /* wait until interrupts have finished executing on other CPUs */
 411         prism54_synchronize_irq(priv->pdev->irq);
 412
 413         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 414         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 415         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 416         wmb();
 417         udelay(ISL38XX_WRITEIO_DELAY);
 418
 419         reg |= ISL38XX_CTRL_STAT_RESET;
 420         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 421         wmb();
 422         udelay(ISL38XX_WRITEIO_DELAY);
 423
 424         /* clear the Reset bit */
 425         reg &= ~ISL38XX_CTRL_STAT_RESET;
 426         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 427         wmb();
 428
 429         /* wait a while for the device to reset */
 430         set_current_state(TASK_UNINTERRUPTIBLE);
 431         schedule_timeout(50*HZ/1000);
 432
 433         return 0;
 434 }
 435
 436 static int
 437 islpci_upload_fw(islpci_private *priv)
 438 {
 439         islpci_state_t old_state;
 440         u32 rc;
 441
 442         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 443
 444         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 445
 446         rc = isl_upload_firmware(priv);
 447         if (rc) {
 448                 /* error uploading the firmware */
 449                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 450                        priv->ndev->name, priv->firmware);
 451
 452                 islpci_set_state(priv, old_state);
 453                 return rc;
 454         }
 455
 456         printk(KERN_DEBUG
 457                "%s: firmware uploaded done, now triggering reset...\n",
 458                priv->ndev->name);
 459
 460         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 461
 462         return 0;
 463 }
 464
 465 static int
 466 islpci_reset_if(islpci_private *priv)
 467 {
 468         long remaining;
 469         int result = -ETIME;
 470         int count;
 471
 472         DEFINE_WAIT(wait);
 473         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 474
 475         /* now the last step is to reset the interface */
 476         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 477         islpci_set_state(priv, PRV_STATE_PREINIT);
 478
 479         for(count = 0; count < 2 && result; count++) {
 480                 /* The software reset acknowledge needs about 220 msec here.
 481                  * Be conservative and wait for up to one second. */
 482
 483                 remaining = schedule_timeout(HZ);
 484
 485                 if(remaining > 0) {
 486                         result = 0;
 487                         break;
 488                 }
 489
 490                 /* If we're here it's because our IRQ hasn't yet gone through.
 491                  * Retry a bit more...
 492                  */
 493                  printk(KERN_ERR "%s: device soft reset timed out\n",
 494                        priv->ndev->name);
 495
 496         }
 497
 498         finish_wait(&priv->reset_done, &wait);
 499
 500         if(result)
 501                 return result;
 502
 503         islpci_set_state(priv, PRV_STATE_INIT);
 504
 505         /* Now that the device is 100% up, let's allow
 506          * for the other interrupts --
 507          * NOTE: this is not *yet* true since we've only allowed the
 508          * INIT interrupt on the IRQ line. We can perhaps poll
 509          * the IRQ line until we know for sure the reset went through */
 510         isl38xx_enable_common_interrupts(priv->device_base);
 511
 512         down_write(&priv->mib_sem);
 513         mgt_commit(priv);
 514         up_write(&priv->mib_sem);
 515
 516         islpci_set_state(priv, PRV_STATE_READY);
 517
 518         return 0;
 519 }
 520
 521 int
 522 islpci_reset(islpci_private *priv, int reload_firmware)
 523 {
 524         isl38xx_control_block *cb =    /* volatile not needed */
 525                 (isl38xx_control_block *) priv->control_block;
 526         unsigned counter;
 527         int rc;
 528
 529         if (reload_firmware)
 530                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 531         else
 532                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 533
 534         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 535
 536         /* disable all device interrupts in case they weren't */
 537         isl38xx_disable_interrupts(priv->device_base);
 538
 539         /* flush all management queues */
 540         priv->index_mgmt_tx = 0;
 541         priv->index_mgmt_rx = 0;
 542
 543         /* clear the indexes in the frame pointer */
 544         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 545                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 546                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 547         }
 548
 549         /* reset the mgmt receive queue */
 550         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 551                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 552                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 553                 frag->flags = 0;
 554                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 555         }
 556
 557         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 558                 cb->rx_data_low[counter].address =
 559                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 560         }
 561
 562         /* since the receive queues are filled with empty fragments, now we can
 563          * set the corresponding indexes in the Control Block */
 564         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 565             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 566         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 567             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 568
 569         /* reset the remaining real index registers and full flags */
 570         priv->free_data_rx = 0;
 571         priv->free_data_tx = 0;
 572         priv->data_low_tx_full = 0;
 573
 574         if (reload_firmware) { /* Should we load the firmware ? */
 575         /* now that the data structures are cleaned up, upload
 576          * firmware and reset interface */
 577                 rc = islpci_upload_fw(priv);
 578                 if (rc)
 579                         return rc;
 580         }
 581
 582         /* finally reset interface */
 583         rc = islpci_reset_if(priv);
 584         if (!rc) /* If successful */
 585                 return rc;
 586
 587         printk(KERN_DEBUG  "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 588         return rc;
 589
 590 }
 591
 592 struct net_device_stats *
 593 islpci_statistics(struct net_device *ndev)
 594 {
 595         islpci_private *priv = netdev_priv(ndev);
 596
 597 #if VERBOSE > SHOW_ERROR_MESSAGES
 598         DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics \n");
 599 #endif
 600
 601         return &priv->statistics;
 602 }
 603
 604 /******************************************************************************
 605     Network device configuration functions
 606 ******************************************************************************/
 607 static int
 608 islpci_alloc_memory(islpci_private *priv)
 609 {
 610         int counter;
 611
 612 #if VERBOSE > SHOW_ERROR_MESSAGES
 613         printk(KERN_DEBUG "islpci_alloc_memory\n");
 614 #endif
 615
 616         /* remap the PCI device base address to accessable */
 617         if (!(priv->device_base =
 618               ioremap(pci_resource_start(priv->pdev, 0),
 619                       ISL38XX_PCI_MEM_SIZE))) {
 620                 /* error in remapping the PCI device memory address range */
 621                 printk(KERN_ERR "PCI memory remapping failed \n");
 622                 return -1;
 623         }
 624
 625         /* memory layout for consistent DMA region:
 626          *
 627          * Area 1: Control Block for the device interface
 628          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 629          *         the number of supported stations in the AP determines the minimal
 630          *         size of the buffer !
 631          */
 632
 633         /* perform the allocation */
 634         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 635                                                         HOST_MEM_BLOCK,
 636                                                         &priv->
 637                                                         device_host_address);
 638
 639         if (!priv->driver_mem_address) {
 640                 /* error allocating the block of PCI memory */
 641                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 642                        "prism54");
 643                 return -1;
 644         }
 645
 646         /* assign the Control Block to the first address of the allocated area */
 647         priv->control_block =
 648             (isl38xx_control_block *) priv->driver_mem_address;
 649
 650         /* set the Power Save Buffer pointer directly behind the CB */
 651         priv->device_psm_buffer =
 652                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 653
 654         /* make sure all buffer pointers are initialized */
 655         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 656                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 657                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 658         }
 659
 660         priv->index_mgmt_rx = 0;
 661         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 662         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 663
 664         /* allocate rx queue for management frames */
 665         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 666                 goto out_free;
 667
 668         /* now get the data rx skb's */
 669         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 670         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 671
 672         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 673                 struct sk_buff *skb;
 674
 675                 /* allocate an sk_buff for received data frames storage
 676                  * each frame on receive size consists of 1 fragment
 677                  * include any required allignment operations */
 678                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 679                         /* error allocating an sk_buff structure elements */
 680                         printk(KERN_ERR "Error allocating skb.\n");
 681                         skb = NULL;
 682                         goto out_free;
 683                 }
 684                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 685                 /* add the new allocated sk_buff to the buffer array */
 686                 priv->data_low_rx[counter] = skb;
 687
 688                 /* map the allocated skb data area to pci */
 689                 priv->pci_map_rx_address[counter] =
 690                     pci_map_single(priv->pdev, (void *) skb->data,
 691                                    MAX_FRAGMENT_SIZE_RX + 2,
 692                                    PCI_DMA_FROMDEVICE);
 693                 if (!priv->pci_map_rx_address[counter]) {
 694                         /* error mapping the buffer to device
 695                            accessable memory address */
 696                         printk(KERN_ERR "failed to map skb DMA'able\n");
 697                         goto out_free;
 698                 }
 699         }
 700
 701         prism54_acl_init(&priv->acl);
 702         prism54_wpa_ie_init(priv);
 703         if (mgt_init(priv))
 704                 goto out_free;
 705
 706         return 0;
 707  out_free:
 708         islpci_free_memory(priv);
 709         return -1;
 710 }
 711
 712 int
 713 islpci_free_memory(islpci_private *priv)
 714 {
 715         int counter;
 716
 717         if (priv->device_base)
 718                 iounmap(priv->device_base);
 719         priv->device_base = 0;
 720
 721         /* free consistent DMA area... */
 722         if (priv->driver_mem_address)
 723                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 724                                     priv->driver_mem_address,
 725                                     priv->device_host_address);
 726
 727         /* clear some dangling pointers */
 728         priv->driver_mem_address = 0;
 729         priv->device_host_address = 0;
 730         priv->device_psm_buffer = 0;
 731         priv->control_block = 0;
 732
 733         /* clean up mgmt rx buffers */
 734         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 735                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 736                 if (buf->pci_addr)
 737                         pci_unmap_single(priv->pdev, buf->pci_addr,
 738                                          buf->size, PCI_DMA_FROMDEVICE);
 739                 buf->pci_addr = 0;
 740                 if (buf->mem)
 741                         kfree(buf->mem);
 742                 buf->size = 0;
 743                 buf->mem = NULL;
 744         }
 745
 746         /* clean up data rx buffers */
 747         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 748                 if (priv->pci_map_rx_address[counter])
 749                         pci_unmap_single(priv->pdev,
 750                                          priv->pci_map_rx_address[counter],
 751                                          MAX_FRAGMENT_SIZE_RX + 2,
 752                                          PCI_DMA_FROMDEVICE);
 753                 priv->pci_map_rx_address[counter] = 0;
 754
 755                 if (priv->data_low_rx[counter])
 756                         dev_kfree_skb(priv->data_low_rx[counter]);
 757                 priv->data_low_rx[counter] = 0;
 758         }
 759
 760         /* Free the acces control list and the WPA list */
 761         prism54_acl_clean(&priv->acl);
 762         prism54_wpa_ie_clean(priv);
 763         mgt_clean(priv);
 764
 765         return 0;
 766 }
 767
 768 #if 0
 769 static void
 770 islpci_set_multicast_list(struct net_device *dev)
 771 {
 772         /* put device into promisc mode and let network layer handle it */
 773 }
 774 #endif
 775
 776 struct net_device *
 777 islpci_setup(struct pci_dev *pdev)
 778 {
 779         islpci_private *priv;
 780         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 781
 782         if (!ndev)
 783                 return ndev;
 784
 785         SET_MODULE_OWNER(ndev);
 786         pci_set_drvdata(pdev, ndev);
 787 #if defined(SET_NETDEV_DEV)
 788         SET_NETDEV_DEV(ndev, &pdev->dev);
 789 #endif
 790
 791         /* setup the structure members */
 792         ndev->base_addr = pci_resource_start(pdev, 0);
 793         ndev->irq = pdev->irq;
 794
 795         /* initialize the function pointers */
 796         ndev->open = &islpci_open;
 797         ndev->stop = &islpci_close;
 798         ndev->get_stats = &islpci_statistics;
 799         ndev->get_wireless_stats = &prism54_get_wireless_stats;
 800         ndev->do_ioctl = &prism54_ioctl;
 801         ndev->wireless_handlers =
 802             (struct iw_handler_def *) &prism54_handler_def;
 803
 804         ndev->hard_start_xmit = &islpci_eth_transmit;
 805         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 806         ndev->addr_len = ETH_ALEN;
 807         ndev->set_mac_address = &prism54_set_mac_address;
 808         /* Get a non-zero dummy MAC address for nameif. Jean II */
 809         memcpy(ndev->dev_addr, dummy_mac, 6);
 810
 811 #ifdef HAVE_TX_TIMEOUT
 812         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 813         ndev->tx_timeout = &islpci_eth_tx_timeout;
 814 #endif
 815
 816         /* allocate a private device structure to the network device  */
 817         priv = netdev_priv(ndev);
 818         priv->ndev = ndev;
 819         priv->pdev = pdev;
 820         priv->monitor_type = ARPHRD_IEEE80211;
 821         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 822                 priv->monitor_type : ARPHRD_ETHER;
 823
 824         /* save the start and end address of the PCI memory area */
 825         ndev->mem_start = (unsigned long) priv->device_base;
 826         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 827
 828 #if VERBOSE > SHOW_ERROR_MESSAGES
 829         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 830 #endif
 831
 832         init_waitqueue_head(&priv->reset_done);
 833
 834         /* init the queue read locks, process wait counter */
 835         sema_init(&priv->mgmt_sem, 1);
 836         priv->mgmt_received = NULL;
 837         init_waitqueue_head(&priv->mgmt_wqueue);
 838         sema_init(&priv->stats_sem, 1);
 839         spin_lock_init(&priv->slock);
 840
 841         /* init state machine with off#1 state */
 842         priv->state = PRV_STATE_OFF;
 843         priv->state_off = 1;
 844
 845         /* initialize workqueue's */
 846         INIT_WORK(&priv->stats_work,
 847                   (void (*)(void *)) prism54_update_stats, priv);
 848         priv->stats_timestamp = 0;
 849
 850         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake, priv);
 851         priv->reset_task_pending = 0;
 852
 853         /* allocate various memory areas */
 854         if (islpci_alloc_memory(priv))
 855                 goto do_free_netdev;
 856
 857         /* select the firmware file depending on the device id */
 858         switch (pdev->device) {
 859         case PCIDEVICE_ISL3890:
 860         case PCIDEVICE_3COM6001:
 861                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 862                 break;
 863         case PCIDEVICE_ISL3877:
 864                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 865                 break;
 866
 867         default:
 868                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 869                 break;
 870         }
 871
 872         if (register_netdev(ndev)) {
 873                 DEBUG(SHOW_ERROR_MESSAGES,
 874                       "ERROR: register_netdev() failed \n");
 875                 goto do_islpci_free_memory;
 876         }
 877
 878         return ndev;
 879
 880       do_islpci_free_memory:
 881         islpci_free_memory(priv);
 882       do_free_netdev:
 883         pci_set_drvdata(pdev, 0);
 884         free_netdev(ndev);
 885         priv = 0;
 886         return NULL;
 887 }
 888
 889 islpci_state_t
 890 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 891 {
 892         islpci_state_t old_state;
 893
 894         /* lock */
 895         old_state = priv->state;
 896
 897         /* this means either a race condition or some serious error in
 898          * the driver code */
 899         switch (new_state) {
 900         case PRV_STATE_OFF:
 901                 priv->state_off++;
 902         default:
 903                 priv->state = new_state;
 904                 break;
 905
 906         case PRV_STATE_PREBOOT:
 907                 /* there are actually many off-states, enumerated by
 908                  * state_off */
 909                 if (old_state == PRV_STATE_OFF)
 910                         priv->state_off--;
 911
 912                 /* only if hw_unavailable is zero now it means we either
 913                  * were in off#1 state, or came here from
 914                  * somewhere else */
 915                 if (!priv->state_off)
 916                         priv->state = new_state;
 917                 break;
 918         };
 919 #if 0
 920         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 921                priv->ndev->name, old_state, new_state, priv->state_off);
 922 #endif
 923
 924         /* invariants */
 925         BUG_ON(priv->state_off < 0);
 926         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 927         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 928
 929         /* unlock */
 930         return old_state;
 931 }