drivers/net/wireless/intersil/prism54/islpci_dev.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   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
   8 #include <linux/hardirq.h>
   9 #include <linux/module.h>
  10 #include <linux/slab.h>
  11
  12 #include <linux/netdevice.h>
  13 #include <linux/ethtool.h>
  14 #include <linux/pci.h>
  15 #include <linux/sched.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/delay.h>
  18 #include <linux/if_arp.h>
  19
  20 #include <asm/io.h>
  21
  22 #include "prismcompat.h"
  23 #include "isl_38xx.h"
  24 #include "isl_ioctl.h"
  25 #include "islpci_dev.h"
  26 #include "islpci_mgt.h"
  27 #include "islpci_eth.h"
  28 #include "oid_mgt.h"
  29
  30 #define ISL3877_IMAGE_FILE      "/*(DEBLOBBED)*/"
  31 #define ISL3886_IMAGE_FILE      "/*(DEBLOBBED)*/"
  32 #define ISL3890_IMAGE_FILE      "/*(DEBLOBBED)*/"
  33 /*(DEBLOBBED)*/
  34
  35 static int prism54_bring_down(islpci_private *);
  36 static int islpci_alloc_memory(islpci_private *);
  37
  38 /* Temporary dummy MAC address to use until firmware is loaded.
  39  * The idea there is that some tools (such as nameif) may query
  40  * the MAC address before the netdev is 'open'. By using a valid
  41  * OUI prefix, they can process the netdev properly.
  42  * Of course, this is not the final/real MAC address. It doesn't
  43  * matter, as you are suppose to be able to change it anytime via
  44  * ndev->set_mac_address. Jean II */
  45 static const unsigned char      dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  46
  47 static int
  48 isl_upload_firmware(islpci_private *priv)
  49 {
  50         u32 reg, rc;
  51         void __iomem *device_base = priv->device_base;
  52
  53         /* clear the RAMBoot and the Reset bit */
  54         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  55         reg &= ~ISL38XX_CTRL_STAT_RESET;
  56         reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  57         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  58         wmb();
  59         udelay(ISL38XX_WRITEIO_DELAY);
  60
  61         /* set the Reset bit without reading the register ! */
  62         reg |= ISL38XX_CTRL_STAT_RESET;
  63         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  64         wmb();
  65         udelay(ISL38XX_WRITEIO_DELAY);
  66
  67         /* clear the Reset bit */
  68         reg &= ~ISL38XX_CTRL_STAT_RESET;
  69         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  70         wmb();
  71
  72         /* wait a while for the device to reboot */
  73         mdelay(50);
  74
  75         {
  76                 const struct firmware *fw_entry = NULL;
  77                 long fw_len;
  78                 const u32 *fw_ptr;
  79
  80                 rc = reject_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  81                 if (rc) {
  82                         printk(KERN_ERR
  83                                "%s: reject_firmware() failed for '%s'\n",
  84                                "prism54", priv->firmware);
  85                         return rc;
  86                 }
  87                 /* prepare the Direct Memory Base register */
  88                 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
  89
  90                 fw_ptr = (u32 *) fw_entry->data;
  91                 fw_len = fw_entry->size;
  92
  93                 if (fw_len % 4) {
  94                         printk(KERN_ERR
  95                                "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
  96                                "prism54", priv->firmware);
  97                         release_firmware(fw_entry);
  98                         return -EILSEQ; /* Illegal byte sequence  */;
  99                 }
 100
 101                 while (fw_len > 0) {
 102                         long _fw_len =
 103                             (fw_len >
 104                              ISL38XX_MEMORY_WINDOW_SIZE) ?
 105                             ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 106                         u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 107
 108                         /* set the card's base address for writing the data */
 109                         isl38xx_w32_flush(device_base, reg,
 110                                           ISL38XX_DIR_MEM_BASE_REG);
 111                         wmb();  /* be paranoid */
 112
 113                         /* increment the write address for next iteration */
 114                         reg += _fw_len;
 115                         fw_len -= _fw_len;
 116
 117                         /* write the data to the Direct Memory Window 32bit-wise */
 118                         /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 119                         while (_fw_len > 0) {
 120                                 /* use non-swapping writel() */
 121                                 __raw_writel(*fw_ptr, dev_fw_ptr);
 122                                 fw_ptr++, dev_fw_ptr++;
 123                                 _fw_len -= 4;
 124                         }
 125
 126                         /* flush PCI posting */
 127                         (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 128                         wmb();  /* be paranoid again */
 129
 130                         BUG_ON(_fw_len != 0);
 131                 }
 132
 133                 BUG_ON(fw_len != 0);
 134
 135                 /* Firmware version is at offset 40 (also for "newmac") */
 136                 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
 137                        priv->ndev->name, fw_entry->data + 40);
 138
 139                 release_firmware(fw_entry);
 140         }
 141
 142         /* now reset the device
 143          * clear the Reset & ClkRun bit, set the RAMBoot bit */
 144         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 145         reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 146         reg &= ~ISL38XX_CTRL_STAT_RESET;
 147         reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 148         isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 149         wmb();
 150         udelay(ISL38XX_WRITEIO_DELAY);
 151
 152         /* set the reset bit latches the host override and RAMBoot bits
 153          * into the device for operation when the reset bit is reset */
 154         reg |= ISL38XX_CTRL_STAT_RESET;
 155         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 156         /* don't do flush PCI posting here! */
 157         wmb();
 158         udelay(ISL38XX_WRITEIO_DELAY);
 159
 160         /* clear the reset bit should start the whole circus */
 161         reg &= ~ISL38XX_CTRL_STAT_RESET;
 162         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 163         /* don't do flush PCI posting here! */
 164         wmb();
 165         udelay(ISL38XX_WRITEIO_DELAY);
 166
 167         return 0;
 168 }
 169
 170 /******************************************************************************
 171     Device Interrupt Handler
 172 ******************************************************************************/
 173
 174 irqreturn_t
 175 islpci_interrupt(int irq, void *config)
 176 {
 177         u32 reg;
 178         islpci_private *priv = config;
 179         struct net_device *ndev = priv->ndev;
 180         void __iomem *device = priv->device_base;
 181         int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 182
 183         /* lock the interrupt handler */
 184         spin_lock(&priv->slock);
 185
 186         /* received an interrupt request on a shared IRQ line
 187          * first check whether the device is in sleep mode */
 188         reg = readl(device + ISL38XX_CTRL_STAT_REG);
 189         if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 190                 /* device is in sleep mode, IRQ was generated by someone else */
 191         {
 192 #if VERBOSE > SHOW_ERROR_MESSAGES
 193                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 194 #endif
 195                 spin_unlock(&priv->slock);
 196                 return IRQ_NONE;
 197         }
 198
 199
 200         /* check whether there is any source of interrupt on the device */
 201         reg = readl(device + ISL38XX_INT_IDENT_REG);
 202
 203         /* also check the contents of the Interrupt Enable Register, because this
 204          * will filter out interrupt sources from other devices on the same irq ! */
 205         reg &= readl(device + ISL38XX_INT_EN_REG);
 206         reg &= ISL38XX_INT_SOURCES;
 207
 208         if (reg != 0) {
 209                 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 210                         powerstate = ISL38XX_PSM_ACTIVE_STATE;
 211
 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         } else {
 340 #if VERBOSE > SHOW_ERROR_MESSAGES
 341                 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 342 #endif
 343                 spin_unlock(&priv->slock);
 344                 return IRQ_NONE;
 345         }
 346
 347         /* sleep -> ready */
 348         if (islpci_get_state(priv) == PRV_STATE_SLEEP
 349             && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 350                 islpci_set_state(priv, PRV_STATE_READY);
 351
 352         /* !sleep -> sleep */
 353         if (islpci_get_state(priv) != PRV_STATE_SLEEP
 354             && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 355                 islpci_set_state(priv, PRV_STATE_SLEEP);
 356
 357         /* unlock the interrupt handler */
 358         spin_unlock(&priv->slock);
 359
 360         return IRQ_HANDLED;
 361 }
 362
 363 /******************************************************************************
 364     Network Interface Control & Statistical functions
 365 ******************************************************************************/
 366 static int
 367 islpci_open(struct net_device *ndev)
 368 {
 369         u32 rc;
 370         islpci_private *priv = netdev_priv(ndev);
 371
 372         /* reset data structures, upload firmware and reset device */
 373         rc = islpci_reset(priv,1);
 374         if (rc) {
 375                 prism54_bring_down(priv);
 376                 return rc; /* Returns informative message */
 377         }
 378
 379         netif_start_queue(ndev);
 380
 381         /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
 382          * once the firmware receives a trap of being associated
 383          * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
 384          * should just leave the carrier on as its expected the firmware
 385          * won't send us a trigger. */
 386         if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
 387                 netif_carrier_off(ndev);
 388         else
 389                 netif_carrier_on(ndev);
 390
 391         return 0;
 392 }
 393
 394 static int
 395 islpci_close(struct net_device *ndev)
 396 {
 397         islpci_private *priv = netdev_priv(ndev);
 398
 399         printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 400
 401         netif_stop_queue(ndev);
 402
 403         return prism54_bring_down(priv);
 404 }
 405
 406 static int
 407 prism54_bring_down(islpci_private *priv)
 408 {
 409         void __iomem *device_base = priv->device_base;
 410         u32 reg;
 411         /* we are going to shutdown the device */
 412         islpci_set_state(priv, PRV_STATE_PREBOOT);
 413
 414         /* disable all device interrupts in case they weren't */
 415         isl38xx_disable_interrupts(priv->device_base);
 416
 417         /* For safety reasons, we may want to ensure that no DMA transfer is
 418          * currently in progress by emptying the TX and RX queues. */
 419
 420         /* wait until interrupts have finished executing on other CPUs */
 421         synchronize_irq(priv->pdev->irq);
 422
 423         reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 424         reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 425         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 426         wmb();
 427         udelay(ISL38XX_WRITEIO_DELAY);
 428
 429         reg |= ISL38XX_CTRL_STAT_RESET;
 430         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 431         wmb();
 432         udelay(ISL38XX_WRITEIO_DELAY);
 433
 434         /* clear the Reset bit */
 435         reg &= ~ISL38XX_CTRL_STAT_RESET;
 436         writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 437         wmb();
 438
 439         /* wait a while for the device to reset */
 440         schedule_timeout_uninterruptible(msecs_to_jiffies(50));
 441
 442         return 0;
 443 }
 444
 445 static int
 446 islpci_upload_fw(islpci_private *priv)
 447 {
 448         islpci_state_t old_state;
 449         u32 rc;
 450
 451         old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 452
 453         printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 454
 455         rc = isl_upload_firmware(priv);
 456         if (rc) {
 457                 /* error uploading the firmware */
 458                 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 459                        priv->ndev->name, priv->firmware);
 460
 461                 islpci_set_state(priv, old_state);
 462                 return rc;
 463         }
 464
 465         printk(KERN_DEBUG "%s: firmware upload complete\n",
 466                priv->ndev->name);
 467
 468         islpci_set_state(priv, PRV_STATE_POSTBOOT);
 469
 470         return 0;
 471 }
 472
 473 static int
 474 islpci_reset_if(islpci_private *priv)
 475 {
 476         long remaining;
 477         int result = -ETIME;
 478         int count;
 479
 480         DEFINE_WAIT(wait);
 481         prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 482
 483         /* now the last step is to reset the interface */
 484         isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 485         islpci_set_state(priv, PRV_STATE_PREINIT);
 486
 487         for(count = 0; count < 2 && result; count++) {
 488                 /* The software reset acknowledge needs about 220 msec here.
 489                  * Be conservative and wait for up to one second. */
 490
 491                 remaining = schedule_timeout_uninterruptible(HZ);
 492
 493                 if(remaining > 0) {
 494                         result = 0;
 495                         break;
 496                 }
 497
 498                 /* If we're here it's because our IRQ hasn't yet gone through.
 499                  * Retry a bit more...
 500                  */
 501                 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
 502                         priv->ndev->name);
 503         }
 504
 505         finish_wait(&priv->reset_done, &wait);
 506
 507         if (result) {
 508                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 509                 return result;
 510         }
 511
 512         islpci_set_state(priv, PRV_STATE_INIT);
 513
 514         /* Now that the device is 100% up, let's allow
 515          * for the other interrupts --
 516          * NOTE: this is not *yet* true since we've only allowed the
 517          * INIT interrupt on the IRQ line. We can perhaps poll
 518          * the IRQ line until we know for sure the reset went through */
 519         isl38xx_enable_common_interrupts(priv->device_base);
 520
 521         down_write(&priv->mib_sem);
 522         result = mgt_commit(priv);
 523         if (result) {
 524                 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 525                 up_write(&priv->mib_sem);
 526                 return result;
 527         }
 528         up_write(&priv->mib_sem);
 529
 530         islpci_set_state(priv, PRV_STATE_READY);
 531
 532         printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
 533         return 0;
 534 }
 535
 536 int
 537 islpci_reset(islpci_private *priv, int reload_firmware)
 538 {
 539         isl38xx_control_block *cb =    /* volatile not needed */
 540                 (isl38xx_control_block *) priv->control_block;
 541         unsigned counter;
 542         int rc;
 543
 544         if (reload_firmware)
 545                 islpci_set_state(priv, PRV_STATE_PREBOOT);
 546         else
 547                 islpci_set_state(priv, PRV_STATE_POSTBOOT);
 548
 549         printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 550
 551         /* disable all device interrupts in case they weren't */
 552         isl38xx_disable_interrupts(priv->device_base);
 553
 554         /* flush all management queues */
 555         priv->index_mgmt_tx = 0;
 556         priv->index_mgmt_rx = 0;
 557
 558         /* clear the indexes in the frame pointer */
 559         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 560                 cb->driver_curr_frag[counter] = cpu_to_le32(0);
 561                 cb->device_curr_frag[counter] = cpu_to_le32(0);
 562         }
 563
 564         /* reset the mgmt receive queue */
 565         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 566                 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 567                 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 568                 frag->flags = 0;
 569                 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 570         }
 571
 572         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 573                 cb->rx_data_low[counter].address =
 574                     cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 575         }
 576
 577         /* since the receive queues are filled with empty fragments, now we can
 578          * set the corresponding indexes in the Control Block */
 579         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 580             cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 581         priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 582             cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 583
 584         /* reset the remaining real index registers and full flags */
 585         priv->free_data_rx = 0;
 586         priv->free_data_tx = 0;
 587         priv->data_low_tx_full = 0;
 588
 589         if (reload_firmware) { /* Should we load the firmware ? */
 590         /* now that the data structures are cleaned up, upload
 591          * firmware and reset interface */
 592                 rc = islpci_upload_fw(priv);
 593                 if (rc) {
 594                         printk(KERN_ERR "%s: islpci_reset: failure\n",
 595                                 priv->ndev->name);
 596                         return rc;
 597                 }
 598         }
 599
 600         /* finally reset interface */
 601         rc = islpci_reset_if(priv);
 602         if (rc)
 603                 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 604         return rc;
 605 }
 606
 607 /******************************************************************************
 608     Network device configuration functions
 609 ******************************************************************************/
 610 static int
 611 islpci_alloc_memory(islpci_private *priv)
 612 {
 613         int counter;
 614
 615 #if VERBOSE > SHOW_ERROR_MESSAGES
 616         printk(KERN_DEBUG "islpci_alloc_memory\n");
 617 #endif
 618
 619         /* remap the PCI device base address to accessible */
 620         if (!(priv->device_base =
 621               ioremap(pci_resource_start(priv->pdev, 0),
 622                       ISL38XX_PCI_MEM_SIZE))) {
 623                 /* error in remapping the PCI device memory address range */
 624                 printk(KERN_ERR "PCI memory remapping failed\n");
 625                 return -1;
 626         }
 627
 628         /* memory layout for consistent DMA region:
 629          *
 630          * Area 1: Control Block for the device interface
 631          * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 632          *         the number of supported stations in the AP determines the minimal
 633          *         size of the buffer !
 634          */
 635
 636         /* perform the allocation */
 637         priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 638                                                         HOST_MEM_BLOCK,
 639                                                         &priv->
 640                                                         device_host_address);
 641
 642         if (!priv->driver_mem_address) {
 643                 /* error allocating the block of PCI memory */
 644                 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 645                        "prism54");
 646                 return -1;
 647         }
 648
 649         /* assign the Control Block to the first address of the allocated area */
 650         priv->control_block =
 651             (isl38xx_control_block *) priv->driver_mem_address;
 652
 653         /* set the Power Save Buffer pointer directly behind the CB */
 654         priv->device_psm_buffer =
 655                 priv->device_host_address + CONTROL_BLOCK_SIZE;
 656
 657         /* make sure all buffer pointers are initialized */
 658         for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 659                 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 660                 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 661         }
 662
 663         priv->index_mgmt_rx = 0;
 664         memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 665         memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 666
 667         /* allocate rx queue for management frames */
 668         if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 669                 goto out_free;
 670
 671         /* now get the data rx skb's */
 672         memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 673         memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 674
 675         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 676                 struct sk_buff *skb;
 677
 678                 /* allocate an sk_buff for received data frames storage
 679                  * each frame on receive size consists of 1 fragment
 680                  * include any required allignment operations */
 681                 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 682                         /* error allocating an sk_buff structure elements */
 683                         printk(KERN_ERR "Error allocating skb.\n");
 684                         skb = NULL;
 685                         goto out_free;
 686                 }
 687                 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 688                 /* add the new allocated sk_buff to the buffer array */
 689                 priv->data_low_rx[counter] = skb;
 690
 691                 /* map the allocated skb data area to pci */
 692                 priv->pci_map_rx_address[counter] =
 693                     pci_map_single(priv->pdev, (void *) skb->data,
 694                                    MAX_FRAGMENT_SIZE_RX + 2,
 695                                    PCI_DMA_FROMDEVICE);
 696                 if (pci_dma_mapping_error(priv->pdev,
 697                                           priv->pci_map_rx_address[counter])) {
 698                         priv->pci_map_rx_address[counter] = 0;
 699                         /* error mapping the buffer to device
 700                            accessible memory address */
 701                         printk(KERN_ERR "failed to map skb DMA'able\n");
 702                         goto out_free;
 703                 }
 704         }
 705
 706         prism54_acl_init(&priv->acl);
 707         prism54_wpa_bss_ie_init(priv);
 708         if (mgt_init(priv))
 709                 goto out_free;
 710
 711         return 0;
 712  out_free:
 713         islpci_free_memory(priv);
 714         return -1;
 715 }
 716
 717 int
 718 islpci_free_memory(islpci_private *priv)
 719 {
 720         int counter;
 721
 722         if (priv->device_base)
 723                 iounmap(priv->device_base);
 724         priv->device_base = NULL;
 725
 726         /* free consistent DMA area... */
 727         if (priv->driver_mem_address)
 728                 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
 729                                     priv->driver_mem_address,
 730                                     priv->device_host_address);
 731
 732         /* clear some dangling pointers */
 733         priv->driver_mem_address = NULL;
 734         priv->device_host_address = 0;
 735         priv->device_psm_buffer = 0;
 736         priv->control_block = NULL;
 737
 738         /* clean up mgmt rx buffers */
 739         for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 740                 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
 741                 if (buf->pci_addr)
 742                         pci_unmap_single(priv->pdev, buf->pci_addr,
 743                                          buf->size, PCI_DMA_FROMDEVICE);
 744                 buf->pci_addr = 0;
 745                 kfree(buf->mem);
 746                 buf->size = 0;
 747                 buf->mem = NULL;
 748         }
 749
 750         /* clean up data rx buffers */
 751         for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 752                 if (priv->pci_map_rx_address[counter])
 753                         pci_unmap_single(priv->pdev,
 754                                          priv->pci_map_rx_address[counter],
 755                                          MAX_FRAGMENT_SIZE_RX + 2,
 756                                          PCI_DMA_FROMDEVICE);
 757                 priv->pci_map_rx_address[counter] = 0;
 758
 759                 if (priv->data_low_rx[counter])
 760                         dev_kfree_skb(priv->data_low_rx[counter]);
 761                 priv->data_low_rx[counter] = NULL;
 762         }
 763
 764         /* Free the access control list and the WPA list */
 765         prism54_acl_clean(&priv->acl);
 766         prism54_wpa_bss_ie_clean(priv);
 767         mgt_clean(priv);
 768
 769         return 0;
 770 }
 771
 772 #if 0
 773 static void
 774 islpci_set_multicast_list(struct net_device *dev)
 775 {
 776         /* put device into promisc mode and let network layer handle it */
 777 }
 778 #endif
 779
 780 static void islpci_ethtool_get_drvinfo(struct net_device *dev,
 781                                        struct ethtool_drvinfo *info)
 782 {
 783         strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
 784         strlcpy(info->version, DRV_VERSION, sizeof(info->version));
 785 }
 786
 787 static const struct ethtool_ops islpci_ethtool_ops = {
 788         .get_drvinfo = islpci_ethtool_get_drvinfo,
 789 };
 790
 791 static const struct net_device_ops islpci_netdev_ops = {
 792         .ndo_open               = islpci_open,
 793         .ndo_stop               = islpci_close,
 794         .ndo_start_xmit         = islpci_eth_transmit,
 795         .ndo_tx_timeout         = islpci_eth_tx_timeout,
 796         .ndo_set_mac_address    = prism54_set_mac_address,
 797         .ndo_validate_addr      = eth_validate_addr,
 798 };
 799
 800 static struct device_type wlan_type = {
 801         .name   = "wlan",
 802 };
 803
 804 struct net_device *
 805 islpci_setup(struct pci_dev *pdev)
 806 {
 807         islpci_private *priv;
 808         struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 809
 810         if (!ndev)
 811                 return ndev;
 812
 813         pci_set_drvdata(pdev, ndev);
 814         SET_NETDEV_DEV(ndev, &pdev->dev);
 815         SET_NETDEV_DEVTYPE(ndev, &wlan_type);
 816
 817         /* setup the structure members */
 818         ndev->base_addr = pci_resource_start(pdev, 0);
 819         ndev->irq = pdev->irq;
 820
 821         /* initialize the function pointers */
 822         ndev->netdev_ops = &islpci_netdev_ops;
 823         ndev->wireless_handlers = &prism54_handler_def;
 824         ndev->ethtool_ops = &islpci_ethtool_ops;
 825
 826         /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 827         ndev->addr_len = ETH_ALEN;
 828         /* Get a non-zero dummy MAC address for nameif. Jean II */
 829         memcpy(ndev->dev_addr, dummy_mac, ETH_ALEN);
 830
 831         ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 832
 833         /* allocate a private device structure to the network device  */
 834         priv = netdev_priv(ndev);
 835         priv->ndev = ndev;
 836         priv->pdev = pdev;
 837         priv->monitor_type = ARPHRD_IEEE80211;
 838         priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 839                 priv->monitor_type : ARPHRD_ETHER;
 840
 841         /* Add pointers to enable iwspy support. */
 842         priv->wireless_data.spy_data = &priv->spy_data;
 843         ndev->wireless_data = &priv->wireless_data;
 844
 845         /* save the start and end address of the PCI memory area */
 846         ndev->mem_start = (unsigned long) priv->device_base;
 847         ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 848
 849 #if VERBOSE > SHOW_ERROR_MESSAGES
 850         DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 851 #endif
 852
 853         init_waitqueue_head(&priv->reset_done);
 854
 855         /* init the queue read locks, process wait counter */
 856         mutex_init(&priv->mgmt_lock);
 857         priv->mgmt_received = NULL;
 858         init_waitqueue_head(&priv->mgmt_wqueue);
 859         mutex_init(&priv->stats_lock);
 860         spin_lock_init(&priv->slock);
 861
 862         /* init state machine with off#1 state */
 863         priv->state = PRV_STATE_OFF;
 864         priv->state_off = 1;
 865
 866         /* initialize workqueue's */
 867         INIT_WORK(&priv->stats_work, prism54_update_stats);
 868         priv->stats_timestamp = 0;
 869
 870         INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
 871         priv->reset_task_pending = 0;
 872
 873         /* allocate various memory areas */
 874         if (islpci_alloc_memory(priv))
 875                 goto do_free_netdev;
 876
 877         /* select the firmware file depending on the device id */
 878         switch (pdev->device) {
 879         case 0x3877:
 880                 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 881                 break;
 882
 883         case 0x3886:
 884                 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 885                 break;
 886
 887         default:
 888                 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 889                 break;
 890         }
 891
 892         if (register_netdev(ndev)) {
 893                 DEBUG(SHOW_ERROR_MESSAGES,
 894                       "ERROR: register_netdev() failed\n");
 895                 goto do_islpci_free_memory;
 896         }
 897
 898         return ndev;
 899
 900       do_islpci_free_memory:
 901         islpci_free_memory(priv);
 902       do_free_netdev:
 903         free_netdev(ndev);
 904         priv = NULL;
 905         return NULL;
 906 }
 907
 908 islpci_state_t
 909 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 910 {
 911         islpci_state_t old_state;
 912
 913         /* lock */
 914         old_state = priv->state;
 915
 916         /* this means either a race condition or some serious error in
 917          * the driver code */
 918         switch (new_state) {
 919         case PRV_STATE_OFF:
 920                 priv->state_off++;
 921                 /* fall through */
 922         default:
 923                 priv->state = new_state;
 924                 break;
 925
 926         case PRV_STATE_PREBOOT:
 927                 /* there are actually many off-states, enumerated by
 928                  * state_off */
 929                 if (old_state == PRV_STATE_OFF)
 930                         priv->state_off--;
 931
 932                 /* only if hw_unavailable is zero now it means we either
 933                  * were in off#1 state, or came here from
 934                  * somewhere else */
 935                 if (!priv->state_off)
 936                         priv->state = new_state;
 937                 break;
 938         }
 939 #if 0
 940         printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 941                priv->ndev->name, old_state, new_state, priv->state_off);
 942 #endif
 943
 944         /* invariants */
 945         BUG_ON(priv->state_off < 0);
 946         BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 947         BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 948
 949         /* unlock */
 950         return old_state;
 951 }