linux/drivers/net/wireless/intersil/prism54/islpci_dev.c
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   1/*
   2 *  Copyright (C) 2002 Intersil Americas Inc.
   3 *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
   4 *  Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
   5 *
   6 *  This program is free software; you can redistribute it and/or modify
   7 *  it under the terms of the GNU General Public License as published by
   8 *  the Free Software Foundation; either version 2 of the License
   9 *
  10 *  This program is distributed in the hope that it will be useful,
  11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 *  GNU General Public License for more details.
  14 *
  15 *  You should have received a copy of the GNU General Public License
  16 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  17 *
  18 */
  19
  20#include <linux/hardirq.h>
  21#include <linux/module.h>
  22#include <linux/slab.h>
  23
  24#include <linux/netdevice.h>
  25#include <linux/ethtool.h>
  26#include <linux/pci.h>
  27#include <linux/sched.h>
  28#include <linux/etherdevice.h>
  29#include <linux/delay.h>
  30#include <linux/if_arp.h>
  31
  32#include <asm/io.h>
  33
  34#include "prismcompat.h"
  35#include "isl_38xx.h"
  36#include "isl_ioctl.h"
  37#include "islpci_dev.h"
  38#include "islpci_mgt.h"
  39#include "islpci_eth.h"
  40#include "oid_mgt.h"
  41
  42#define ISL3877_IMAGE_FILE      "isl3877"
  43#define ISL3886_IMAGE_FILE      "isl3886"
  44#define ISL3890_IMAGE_FILE      "isl3890"
  45MODULE_FIRMWARE(ISL3877_IMAGE_FILE);
  46MODULE_FIRMWARE(ISL3886_IMAGE_FILE);
  47MODULE_FIRMWARE(ISL3890_IMAGE_FILE);
  48
  49static int prism54_bring_down(islpci_private *);
  50static int islpci_alloc_memory(islpci_private *);
  51
  52/* Temporary dummy MAC address to use until firmware is loaded.
  53 * The idea there is that some tools (such as nameif) may query
  54 * the MAC address before the netdev is 'open'. By using a valid
  55 * OUI prefix, they can process the netdev properly.
  56 * Of course, this is not the final/real MAC address. It doesn't
  57 * matter, as you are suppose to be able to change it anytime via
  58 * ndev->set_mac_address. Jean II */
  59static const unsigned char      dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
  60
  61static int
  62isl_upload_firmware(islpci_private *priv)
  63{
  64        u32 reg, rc;
  65        void __iomem *device_base = priv->device_base;
  66
  67        /* clear the RAMBoot and the Reset bit */
  68        reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
  69        reg &= ~ISL38XX_CTRL_STAT_RESET;
  70        reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
  71        writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  72        wmb();
  73        udelay(ISL38XX_WRITEIO_DELAY);
  74
  75        /* set the Reset bit without reading the register ! */
  76        reg |= ISL38XX_CTRL_STAT_RESET;
  77        writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  78        wmb();
  79        udelay(ISL38XX_WRITEIO_DELAY);
  80
  81        /* clear the Reset bit */
  82        reg &= ~ISL38XX_CTRL_STAT_RESET;
  83        writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
  84        wmb();
  85
  86        /* wait a while for the device to reboot */
  87        mdelay(50);
  88
  89        {
  90                const struct firmware *fw_entry = NULL;
  91                long fw_len;
  92                const u32 *fw_ptr;
  93
  94                rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
  95                if (rc) {
  96                        printk(KERN_ERR
  97                               "%s: request_firmware() failed for '%s'\n",
  98                               "prism54", priv->firmware);
  99                        return rc;
 100                }
 101                /* prepare the Direct Memory Base register */
 102                reg = ISL38XX_DEV_FIRMWARE_ADDRES;
 103
 104                fw_ptr = (u32 *) fw_entry->data;
 105                fw_len = fw_entry->size;
 106
 107                if (fw_len % 4) {
 108                        printk(KERN_ERR
 109                               "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
 110                               "prism54", priv->firmware);
 111                        release_firmware(fw_entry);
 112                        return -EILSEQ; /* Illegal byte sequence  */;
 113                }
 114
 115                while (fw_len > 0) {
 116                        long _fw_len =
 117                            (fw_len >
 118                             ISL38XX_MEMORY_WINDOW_SIZE) ?
 119                            ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
 120                        u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
 121
 122                        /* set the card's base address for writing the data */
 123                        isl38xx_w32_flush(device_base, reg,
 124                                          ISL38XX_DIR_MEM_BASE_REG);
 125                        wmb();  /* be paranoid */
 126
 127                        /* increment the write address for next iteration */
 128                        reg += _fw_len;
 129                        fw_len -= _fw_len;
 130
 131                        /* write the data to the Direct Memory Window 32bit-wise */
 132                        /* memcpy_toio() doesn't guarantee 32bit writes :-| */
 133                        while (_fw_len > 0) {
 134                                /* use non-swapping writel() */
 135                                __raw_writel(*fw_ptr, dev_fw_ptr);
 136                                fw_ptr++, dev_fw_ptr++;
 137                                _fw_len -= 4;
 138                        }
 139
 140                        /* flush PCI posting */
 141                        (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
 142                        wmb();  /* be paranoid again */
 143
 144                        BUG_ON(_fw_len != 0);
 145                }
 146
 147                BUG_ON(fw_len != 0);
 148
 149                /* Firmware version is at offset 40 (also for "newmac") */
 150                printk(KERN_DEBUG "%s: firmware version: %.8s\n",
 151                       priv->ndev->name, fw_entry->data + 40);
 152
 153                release_firmware(fw_entry);
 154        }
 155
 156        /* now reset the device
 157         * clear the Reset & ClkRun bit, set the RAMBoot bit */
 158        reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 159        reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
 160        reg &= ~ISL38XX_CTRL_STAT_RESET;
 161        reg |= ISL38XX_CTRL_STAT_RAMBOOT;
 162        isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
 163        wmb();
 164        udelay(ISL38XX_WRITEIO_DELAY);
 165
 166        /* set the reset bit latches the host override and RAMBoot bits
 167         * into the device for operation when the reset bit is reset */
 168        reg |= ISL38XX_CTRL_STAT_RESET;
 169        writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 170        /* don't do flush PCI posting here! */
 171        wmb();
 172        udelay(ISL38XX_WRITEIO_DELAY);
 173
 174        /* clear the reset bit should start the whole circus */
 175        reg &= ~ISL38XX_CTRL_STAT_RESET;
 176        writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 177        /* don't do flush PCI posting here! */
 178        wmb();
 179        udelay(ISL38XX_WRITEIO_DELAY);
 180
 181        return 0;
 182}
 183
 184/******************************************************************************
 185    Device Interrupt Handler
 186******************************************************************************/
 187
 188irqreturn_t
 189islpci_interrupt(int irq, void *config)
 190{
 191        u32 reg;
 192        islpci_private *priv = config;
 193        struct net_device *ndev = priv->ndev;
 194        void __iomem *device = priv->device_base;
 195        int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
 196
 197        /* lock the interrupt handler */
 198        spin_lock(&priv->slock);
 199
 200        /* received an interrupt request on a shared IRQ line
 201         * first check whether the device is in sleep mode */
 202        reg = readl(device + ISL38XX_CTRL_STAT_REG);
 203        if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
 204                /* device is in sleep mode, IRQ was generated by someone else */
 205        {
 206#if VERBOSE > SHOW_ERROR_MESSAGES
 207                DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 208#endif
 209                spin_unlock(&priv->slock);
 210                return IRQ_NONE;
 211        }
 212
 213
 214        /* check whether there is any source of interrupt on the device */
 215        reg = readl(device + ISL38XX_INT_IDENT_REG);
 216
 217        /* also check the contents of the Interrupt Enable Register, because this
 218         * will filter out interrupt sources from other devices on the same irq ! */
 219        reg &= readl(device + ISL38XX_INT_EN_REG);
 220        reg &= ISL38XX_INT_SOURCES;
 221
 222        if (reg != 0) {
 223                if (islpci_get_state(priv) != PRV_STATE_SLEEP)
 224                        powerstate = ISL38XX_PSM_ACTIVE_STATE;
 225
 226                /* reset the request bits in the Identification register */
 227                isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
 228
 229#if VERBOSE > SHOW_ERROR_MESSAGES
 230                DEBUG(SHOW_FUNCTION_CALLS,
 231                      "IRQ: Identification register 0x%p 0x%x\n", device, reg);
 232#endif
 233
 234                /* check for each bit in the register separately */
 235                if (reg & ISL38XX_INT_IDENT_UPDATE) {
 236#if VERBOSE > SHOW_ERROR_MESSAGES
 237                        /* Queue has been updated */
 238                        DEBUG(SHOW_TRACING, "IRQ: Update flag\n");
 239
 240                        DEBUG(SHOW_QUEUE_INDEXES,
 241                              "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
 242                              le32_to_cpu(priv->control_block->
 243                                          driver_curr_frag[0]),
 244                              le32_to_cpu(priv->control_block->
 245                                          driver_curr_frag[1]),
 246                              le32_to_cpu(priv->control_block->
 247                                          driver_curr_frag[2]),
 248                              le32_to_cpu(priv->control_block->
 249                                          driver_curr_frag[3]),
 250                              le32_to_cpu(priv->control_block->
 251                                          driver_curr_frag[4]),
 252                              le32_to_cpu(priv->control_block->
 253                                          driver_curr_frag[5])
 254                            );
 255
 256                        DEBUG(SHOW_QUEUE_INDEXES,
 257                              "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
 258                              le32_to_cpu(priv->control_block->
 259                                          device_curr_frag[0]),
 260                              le32_to_cpu(priv->control_block->
 261                                          device_curr_frag[1]),
 262                              le32_to_cpu(priv->control_block->
 263                                          device_curr_frag[2]),
 264                              le32_to_cpu(priv->control_block->
 265                                          device_curr_frag[3]),
 266                              le32_to_cpu(priv->control_block->
 267                                          device_curr_frag[4]),
 268                              le32_to_cpu(priv->control_block->
 269                                          device_curr_frag[5])
 270                            );
 271#endif
 272
 273                        /* cleanup the data low transmit queue */
 274                        islpci_eth_cleanup_transmit(priv, priv->control_block);
 275
 276                        /* device is in active state, update the
 277                         * powerstate flag if necessary */
 278                        powerstate = ISL38XX_PSM_ACTIVE_STATE;
 279
 280                        /* check all three queues in priority order
 281                         * call the PIMFOR receive function until the
 282                         * queue is empty */
 283                        if (isl38xx_in_queue(priv->control_block,
 284                                                ISL38XX_CB_RX_MGMTQ) != 0) {
 285#if VERBOSE > SHOW_ERROR_MESSAGES
 286                                DEBUG(SHOW_TRACING,
 287                                      "Received frame in Management Queue\n");
 288#endif
 289                                islpci_mgt_receive(ndev);
 290
 291                                islpci_mgt_cleanup_transmit(ndev);
 292
 293                                /* Refill slots in receive queue */
 294                                islpci_mgmt_rx_fill(ndev);
 295
 296                                /* no need to trigger the device, next
 297                                   islpci_mgt_transaction does it */
 298                        }
 299
 300                        while (isl38xx_in_queue(priv->control_block,
 301                                                ISL38XX_CB_RX_DATA_LQ) != 0) {
 302#if VERBOSE > SHOW_ERROR_MESSAGES
 303                                DEBUG(SHOW_TRACING,
 304                                      "Received frame in Data Low Queue\n");
 305#endif
 306                                islpci_eth_receive(priv);
 307                        }
 308
 309                        /* check whether the data transmit queues were full */
 310                        if (priv->data_low_tx_full) {
 311                                /* check whether the transmit is not full anymore */
 312                                if (ISL38XX_CB_TX_QSIZE -
 313                                    isl38xx_in_queue(priv->control_block,
 314                                                     ISL38XX_CB_TX_DATA_LQ) >=
 315                                    ISL38XX_MIN_QTHRESHOLD) {
 316                                        /* nope, the driver is ready for more network frames */
 317                                        netif_wake_queue(priv->ndev);
 318
 319                                        /* reset the full flag */
 320                                        priv->data_low_tx_full = 0;
 321                                }
 322                        }
 323                }
 324
 325                if (reg & ISL38XX_INT_IDENT_INIT) {
 326                        /* Device has been initialized */
 327#if VERBOSE > SHOW_ERROR_MESSAGES
 328                        DEBUG(SHOW_TRACING,
 329                              "IRQ: Init flag, device initialized\n");
 330#endif
 331                        wake_up(&priv->reset_done);
 332                }
 333
 334                if (reg & ISL38XX_INT_IDENT_SLEEP) {
 335                        /* Device intends to move to powersave state */
 336#if VERBOSE > SHOW_ERROR_MESSAGES
 337                        DEBUG(SHOW_TRACING, "IRQ: Sleep flag\n");
 338#endif
 339                        isl38xx_handle_sleep_request(priv->control_block,
 340                                                     &powerstate,
 341                                                     priv->device_base);
 342                }
 343
 344                if (reg & ISL38XX_INT_IDENT_WAKEUP) {
 345                        /* Device has been woken up to active state */
 346#if VERBOSE > SHOW_ERROR_MESSAGES
 347                        DEBUG(SHOW_TRACING, "IRQ: Wakeup flag\n");
 348#endif
 349
 350                        isl38xx_handle_wakeup(priv->control_block,
 351                                              &powerstate, priv->device_base);
 352                }
 353        } else {
 354#if VERBOSE > SHOW_ERROR_MESSAGES
 355                DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
 356#endif
 357                spin_unlock(&priv->slock);
 358                return IRQ_NONE;
 359        }
 360
 361        /* sleep -> ready */
 362        if (islpci_get_state(priv) == PRV_STATE_SLEEP
 363            && powerstate == ISL38XX_PSM_ACTIVE_STATE)
 364                islpci_set_state(priv, PRV_STATE_READY);
 365
 366        /* !sleep -> sleep */
 367        if (islpci_get_state(priv) != PRV_STATE_SLEEP
 368            && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
 369                islpci_set_state(priv, PRV_STATE_SLEEP);
 370
 371        /* unlock the interrupt handler */
 372        spin_unlock(&priv->slock);
 373
 374        return IRQ_HANDLED;
 375}
 376
 377/******************************************************************************
 378    Network Interface Control & Statistical functions
 379******************************************************************************/
 380static int
 381islpci_open(struct net_device *ndev)
 382{
 383        u32 rc;
 384        islpci_private *priv = netdev_priv(ndev);
 385
 386        /* reset data structures, upload firmware and reset device */
 387        rc = islpci_reset(priv,1);
 388        if (rc) {
 389                prism54_bring_down(priv);
 390                return rc; /* Returns informative message */
 391        }
 392
 393        netif_start_queue(ndev);
 394
 395        /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
 396         * once the firmware receives a trap of being associated
 397         * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
 398         * should just leave the carrier on as its expected the firmware
 399         * won't send us a trigger. */
 400        if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
 401                netif_carrier_off(ndev);
 402        else
 403                netif_carrier_on(ndev);
 404
 405        return 0;
 406}
 407
 408static int
 409islpci_close(struct net_device *ndev)
 410{
 411        islpci_private *priv = netdev_priv(ndev);
 412
 413        printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
 414
 415        netif_stop_queue(ndev);
 416
 417        return prism54_bring_down(priv);
 418}
 419
 420static int
 421prism54_bring_down(islpci_private *priv)
 422{
 423        void __iomem *device_base = priv->device_base;
 424        u32 reg;
 425        /* we are going to shutdown the device */
 426        islpci_set_state(priv, PRV_STATE_PREBOOT);
 427
 428        /* disable all device interrupts in case they weren't */
 429        isl38xx_disable_interrupts(priv->device_base);
 430
 431        /* For safety reasons, we may want to ensure that no DMA transfer is
 432         * currently in progress by emptying the TX and RX queues. */
 433
 434        /* wait until interrupts have finished executing on other CPUs */
 435        synchronize_irq(priv->pdev->irq);
 436
 437        reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
 438        reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
 439        writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 440        wmb();
 441        udelay(ISL38XX_WRITEIO_DELAY);
 442
 443        reg |= ISL38XX_CTRL_STAT_RESET;
 444        writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 445        wmb();
 446        udelay(ISL38XX_WRITEIO_DELAY);
 447
 448        /* clear the Reset bit */
 449        reg &= ~ISL38XX_CTRL_STAT_RESET;
 450        writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
 451        wmb();
 452
 453        /* wait a while for the device to reset */
 454        schedule_timeout_uninterruptible(msecs_to_jiffies(50));
 455
 456        return 0;
 457}
 458
 459static int
 460islpci_upload_fw(islpci_private *priv)
 461{
 462        islpci_state_t old_state;
 463        u32 rc;
 464
 465        old_state = islpci_set_state(priv, PRV_STATE_BOOT);
 466
 467        printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
 468
 469        rc = isl_upload_firmware(priv);
 470        if (rc) {
 471                /* error uploading the firmware */
 472                printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
 473                       priv->ndev->name, priv->firmware);
 474
 475                islpci_set_state(priv, old_state);
 476                return rc;
 477        }
 478
 479        printk(KERN_DEBUG "%s: firmware upload complete\n",
 480               priv->ndev->name);
 481
 482        islpci_set_state(priv, PRV_STATE_POSTBOOT);
 483
 484        return 0;
 485}
 486
 487static int
 488islpci_reset_if(islpci_private *priv)
 489{
 490        long remaining;
 491        int result = -ETIME;
 492        int count;
 493
 494        DEFINE_WAIT(wait);
 495        prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
 496
 497        /* now the last step is to reset the interface */
 498        isl38xx_interface_reset(priv->device_base, priv->device_host_address);
 499        islpci_set_state(priv, PRV_STATE_PREINIT);
 500
 501        for(count = 0; count < 2 && result; count++) {
 502                /* The software reset acknowledge needs about 220 msec here.
 503                 * Be conservative and wait for up to one second. */
 504
 505                remaining = schedule_timeout_uninterruptible(HZ);
 506
 507                if(remaining > 0) {
 508                        result = 0;
 509                        break;
 510                }
 511
 512                /* If we're here it's because our IRQ hasn't yet gone through.
 513                 * Retry a bit more...
 514                 */
 515                printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
 516                        priv->ndev->name);
 517        }
 518
 519        finish_wait(&priv->reset_done, &wait);
 520
 521        if (result) {
 522                printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 523                return result;
 524        }
 525
 526        islpci_set_state(priv, PRV_STATE_INIT);
 527
 528        /* Now that the device is 100% up, let's allow
 529         * for the other interrupts --
 530         * NOTE: this is not *yet* true since we've only allowed the
 531         * INIT interrupt on the IRQ line. We can perhaps poll
 532         * the IRQ line until we know for sure the reset went through */
 533        isl38xx_enable_common_interrupts(priv->device_base);
 534
 535        down_write(&priv->mib_sem);
 536        result = mgt_commit(priv);
 537        if (result) {
 538                printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
 539                up_write(&priv->mib_sem);
 540                return result;
 541        }
 542        up_write(&priv->mib_sem);
 543
 544        islpci_set_state(priv, PRV_STATE_READY);
 545
 546        printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
 547        return 0;
 548}
 549
 550int
 551islpci_reset(islpci_private *priv, int reload_firmware)
 552{
 553        isl38xx_control_block *cb =    /* volatile not needed */
 554                (isl38xx_control_block *) priv->control_block;
 555        unsigned counter;
 556        int rc;
 557
 558        if (reload_firmware)
 559                islpci_set_state(priv, PRV_STATE_PREBOOT);
 560        else
 561                islpci_set_state(priv, PRV_STATE_POSTBOOT);
 562
 563        printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
 564
 565        /* disable all device interrupts in case they weren't */
 566        isl38xx_disable_interrupts(priv->device_base);
 567
 568        /* flush all management queues */
 569        priv->index_mgmt_tx = 0;
 570        priv->index_mgmt_rx = 0;
 571
 572        /* clear the indexes in the frame pointer */
 573        for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 574                cb->driver_curr_frag[counter] = cpu_to_le32(0);
 575                cb->device_curr_frag[counter] = cpu_to_le32(0);
 576        }
 577
 578        /* reset the mgmt receive queue */
 579        for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
 580                isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
 581                frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
 582                frag->flags = 0;
 583                frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
 584        }
 585
 586        for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 587                cb->rx_data_low[counter].address =
 588                    cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
 589        }
 590
 591        /* since the receive queues are filled with empty fragments, now we can
 592         * set the corresponding indexes in the Control Block */
 593        priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
 594            cpu_to_le32(ISL38XX_CB_RX_QSIZE);
 595        priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
 596            cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
 597
 598        /* reset the remaining real index registers and full flags */
 599        priv->free_data_rx = 0;
 600        priv->free_data_tx = 0;
 601        priv->data_low_tx_full = 0;
 602
 603        if (reload_firmware) { /* Should we load the firmware ? */
 604        /* now that the data structures are cleaned up, upload
 605         * firmware and reset interface */
 606                rc = islpci_upload_fw(priv);
 607                if (rc) {
 608                        printk(KERN_ERR "%s: islpci_reset: failure\n",
 609                                priv->ndev->name);
 610                        return rc;
 611                }
 612        }
 613
 614        /* finally reset interface */
 615        rc = islpci_reset_if(priv);
 616        if (rc)
 617                printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
 618        return rc;
 619}
 620
 621/******************************************************************************
 622    Network device configuration functions
 623******************************************************************************/
 624static int
 625islpci_alloc_memory(islpci_private *priv)
 626{
 627        int counter;
 628
 629#if VERBOSE > SHOW_ERROR_MESSAGES
 630        printk(KERN_DEBUG "islpci_alloc_memory\n");
 631#endif
 632
 633        /* remap the PCI device base address to accessible */
 634        if (!(priv->device_base =
 635              ioremap(pci_resource_start(priv->pdev, 0),
 636                      ISL38XX_PCI_MEM_SIZE))) {
 637                /* error in remapping the PCI device memory address range */
 638                printk(KERN_ERR "PCI memory remapping failed\n");
 639                return -1;
 640        }
 641
 642        /* memory layout for consistent DMA region:
 643         *
 644         * Area 1: Control Block for the device interface
 645         * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
 646         *         the number of supported stations in the AP determines the minimal
 647         *         size of the buffer !
 648         */
 649
 650        /* perform the allocation */
 651        priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
 652                                                        HOST_MEM_BLOCK,
 653                                                        &priv->
 654                                                        device_host_address);
 655
 656        if (!priv->driver_mem_address) {
 657                /* error allocating the block of PCI memory */
 658                printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
 659                       "prism54");
 660                return -1;
 661        }
 662
 663        /* assign the Control Block to the first address of the allocated area */
 664        priv->control_block =
 665            (isl38xx_control_block *) priv->driver_mem_address;
 666
 667        /* set the Power Save Buffer pointer directly behind the CB */
 668        priv->device_psm_buffer =
 669                priv->device_host_address + CONTROL_BLOCK_SIZE;
 670
 671        /* make sure all buffer pointers are initialized */
 672        for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
 673                priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
 674                priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
 675        }
 676
 677        priv->index_mgmt_rx = 0;
 678        memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
 679        memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
 680
 681        /* allocate rx queue for management frames */
 682        if (islpci_mgmt_rx_fill(priv->ndev) < 0)
 683                goto out_free;
 684
 685        /* now get the data rx skb's */
 686        memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
 687        memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
 688
 689        for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 690                struct sk_buff *skb;
 691
 692                /* allocate an sk_buff for received data frames storage
 693                 * each frame on receive size consists of 1 fragment
 694                 * include any required allignment operations */
 695                if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
 696                        /* error allocating an sk_buff structure elements */
 697                        printk(KERN_ERR "Error allocating skb.\n");
 698                        skb = NULL;
 699                        goto out_free;
 700                }
 701                skb_reserve(skb, (4 - (long) skb->data) & 0x03);
 702                /* add the new allocated sk_buff to the buffer array */
 703                priv->data_low_rx[counter] = skb;
 704
 705                /* map the allocated skb data area to pci */
 706                priv->pci_map_rx_address[counter] =
 707                    pci_map_single(priv->pdev, (void *) skb->data,
 708                                   MAX_FRAGMENT_SIZE_RX + 2,
 709                                   PCI_DMA_FROMDEVICE);
 710                if (pci_dma_mapping_error(priv->pdev,
 711                                          priv->pci_map_rx_address[counter])) {
 712                        priv->pci_map_rx_address[counter] = 0;
 713                        /* error mapping the buffer to device
 714                           accessible 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_bss_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
 731int
 732islpci_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                kfree(buf->mem);
 760                buf->size = 0;
 761                buf->mem = NULL;
 762        }
 763
 764        /* clean up data rx buffers */
 765        for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
 766                if (priv->pci_map_rx_address[counter])
 767                        pci_unmap_single(priv->pdev,
 768                                         priv->pci_map_rx_address[counter],
 769                                         MAX_FRAGMENT_SIZE_RX + 2,
 770                                         PCI_DMA_FROMDEVICE);
 771                priv->pci_map_rx_address[counter] = 0;
 772
 773                if (priv->data_low_rx[counter])
 774                        dev_kfree_skb(priv->data_low_rx[counter]);
 775                priv->data_low_rx[counter] = NULL;
 776        }
 777
 778        /* Free the access control list and the WPA list */
 779        prism54_acl_clean(&priv->acl);
 780        prism54_wpa_bss_ie_clean(priv);
 781        mgt_clean(priv);
 782
 783        return 0;
 784}
 785
 786#if 0
 787static void
 788islpci_set_multicast_list(struct net_device *dev)
 789{
 790        /* put device into promisc mode and let network layer handle it */
 791}
 792#endif
 793
 794static void islpci_ethtool_get_drvinfo(struct net_device *dev,
 795                                       struct ethtool_drvinfo *info)
 796{
 797        strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
 798        strlcpy(info->version, DRV_VERSION, sizeof(info->version));
 799}
 800
 801static const struct ethtool_ops islpci_ethtool_ops = {
 802        .get_drvinfo = islpci_ethtool_get_drvinfo,
 803};
 804
 805static const struct net_device_ops islpci_netdev_ops = {
 806        .ndo_open               = islpci_open,
 807        .ndo_stop               = islpci_close,
 808        .ndo_start_xmit         = islpci_eth_transmit,
 809        .ndo_tx_timeout         = islpci_eth_tx_timeout,
 810        .ndo_set_mac_address    = prism54_set_mac_address,
 811        .ndo_validate_addr      = eth_validate_addr,
 812};
 813
 814static struct device_type wlan_type = {
 815        .name   = "wlan",
 816};
 817
 818struct net_device *
 819islpci_setup(struct pci_dev *pdev)
 820{
 821        islpci_private *priv;
 822        struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
 823
 824        if (!ndev)
 825                return ndev;
 826
 827        pci_set_drvdata(pdev, ndev);
 828        SET_NETDEV_DEV(ndev, &pdev->dev);
 829        SET_NETDEV_DEVTYPE(ndev, &wlan_type);
 830
 831        /* setup the structure members */
 832        ndev->base_addr = pci_resource_start(pdev, 0);
 833        ndev->irq = pdev->irq;
 834
 835        /* initialize the function pointers */
 836        ndev->netdev_ops = &islpci_netdev_ops;
 837        ndev->wireless_handlers = &prism54_handler_def;
 838        ndev->ethtool_ops = &islpci_ethtool_ops;
 839
 840        /* ndev->set_multicast_list = &islpci_set_multicast_list; */
 841        ndev->addr_len = ETH_ALEN;
 842        /* Get a non-zero dummy MAC address for nameif. Jean II */
 843        memcpy(ndev->dev_addr, dummy_mac, ETH_ALEN);
 844
 845        ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
 846
 847        /* allocate a private device structure to the network device  */
 848        priv = netdev_priv(ndev);
 849        priv->ndev = ndev;
 850        priv->pdev = pdev;
 851        priv->monitor_type = ARPHRD_IEEE80211;
 852        priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
 853                priv->monitor_type : ARPHRD_ETHER;
 854
 855        /* Add pointers to enable iwspy support. */
 856        priv->wireless_data.spy_data = &priv->spy_data;
 857        ndev->wireless_data = &priv->wireless_data;
 858
 859        /* save the start and end address of the PCI memory area */
 860        ndev->mem_start = (unsigned long) priv->device_base;
 861        ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
 862
 863#if VERBOSE > SHOW_ERROR_MESSAGES
 864        DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
 865#endif
 866
 867        init_waitqueue_head(&priv->reset_done);
 868
 869        /* init the queue read locks, process wait counter */
 870        mutex_init(&priv->mgmt_lock);
 871        priv->mgmt_received = NULL;
 872        init_waitqueue_head(&priv->mgmt_wqueue);
 873        mutex_init(&priv->stats_lock);
 874        spin_lock_init(&priv->slock);
 875
 876        /* init state machine with off#1 state */
 877        priv->state = PRV_STATE_OFF;
 878        priv->state_off = 1;
 879
 880        /* initialize workqueue's */
 881        INIT_WORK(&priv->stats_work, prism54_update_stats);
 882        priv->stats_timestamp = 0;
 883
 884        INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
 885        priv->reset_task_pending = 0;
 886
 887        /* allocate various memory areas */
 888        if (islpci_alloc_memory(priv))
 889                goto do_free_netdev;
 890
 891        /* select the firmware file depending on the device id */
 892        switch (pdev->device) {
 893        case 0x3877:
 894                strcpy(priv->firmware, ISL3877_IMAGE_FILE);
 895                break;
 896
 897        case 0x3886:
 898                strcpy(priv->firmware, ISL3886_IMAGE_FILE);
 899                break;
 900
 901        default:
 902                strcpy(priv->firmware, ISL3890_IMAGE_FILE);
 903                break;
 904        }
 905
 906        if (register_netdev(ndev)) {
 907                DEBUG(SHOW_ERROR_MESSAGES,
 908                      "ERROR: register_netdev() failed\n");
 909                goto do_islpci_free_memory;
 910        }
 911
 912        return ndev;
 913
 914      do_islpci_free_memory:
 915        islpci_free_memory(priv);
 916      do_free_netdev:
 917        free_netdev(ndev);
 918        priv = NULL;
 919        return NULL;
 920}
 921
 922islpci_state_t
 923islpci_set_state(islpci_private *priv, islpci_state_t new_state)
 924{
 925        islpci_state_t old_state;
 926
 927        /* lock */
 928        old_state = priv->state;
 929
 930        /* this means either a race condition or some serious error in
 931         * the driver code */
 932        switch (new_state) {
 933        case PRV_STATE_OFF:
 934                priv->state_off++;
 935        default:
 936                priv->state = new_state;
 937                break;
 938
 939        case PRV_STATE_PREBOOT:
 940                /* there are actually many off-states, enumerated by
 941                 * state_off */
 942                if (old_state == PRV_STATE_OFF)
 943                        priv->state_off--;
 944
 945                /* only if hw_unavailable is zero now it means we either
 946                 * were in off#1 state, or came here from
 947                 * somewhere else */
 948                if (!priv->state_off)
 949                        priv->state = new_state;
 950                break;
 951        }
 952#if 0
 953        printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
 954               priv->ndev->name, old_state, new_state, priv->state_off);
 955#endif
 956
 957        /* invariants */
 958        BUG_ON(priv->state_off < 0);
 959        BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
 960        BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
 961
 962        /* unlock */
 963        return old_state;
 964}
 965