linux/drivers/firewire/nosy.c
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   1/*
   2 * nosy - Snoop mode driver for TI PCILynx 1394 controllers
   3 * Copyright (C) 2002-2007 Kristian Høgsberg
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; either version 2 of the License, or
   8 * (at your option) any later version.
   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, write to the Free Software Foundation,
  17 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18 */
  19
  20#include <linux/device.h>
  21#include <linux/errno.h>
  22#include <linux/fs.h>
  23#include <linux/init.h>
  24#include <linux/interrupt.h>
  25#include <linux/io.h>
  26#include <linux/kernel.h>
  27#include <linux/kref.h>
  28#include <linux/miscdevice.h>
  29#include <linux/module.h>
  30#include <linux/mutex.h>
  31#include <linux/pci.h>
  32#include <linux/poll.h>
  33#include <linux/sched.h> /* required for linux/wait.h */
  34#include <linux/slab.h>
  35#include <linux/spinlock.h>
  36#include <linux/timex.h>
  37#include <linux/uaccess.h>
  38#include <linux/wait.h>
  39#include <linux/dma-mapping.h>
  40#include <linux/atomic.h>
  41#include <asm/byteorder.h>
  42
  43#include "nosy.h"
  44#include "nosy-user.h"
  45
  46#define TCODE_PHY_PACKET                0x10
  47#define PCI_DEVICE_ID_TI_PCILYNX        0x8000
  48
  49static char driver_name[] = KBUILD_MODNAME;
  50
  51/* this is the physical layout of a PCL, its size is 128 bytes */
  52struct pcl {
  53        __le32 next;
  54        __le32 async_error_next;
  55        u32 user_data;
  56        __le32 pcl_status;
  57        __le32 remaining_transfer_count;
  58        __le32 next_data_buffer;
  59        struct {
  60                __le32 control;
  61                __le32 pointer;
  62        } buffer[13];
  63};
  64
  65struct packet {
  66        unsigned int length;
  67        char data[0];
  68};
  69
  70struct packet_buffer {
  71        char *data;
  72        size_t capacity;
  73        long total_packet_count, lost_packet_count;
  74        atomic_t size;
  75        struct packet *head, *tail;
  76        wait_queue_head_t wait;
  77};
  78
  79struct pcilynx {
  80        struct pci_dev *pci_device;
  81        __iomem char *registers;
  82
  83        struct pcl *rcv_start_pcl, *rcv_pcl;
  84        __le32 *rcv_buffer;
  85
  86        dma_addr_t rcv_start_pcl_bus, rcv_pcl_bus, rcv_buffer_bus;
  87
  88        spinlock_t client_list_lock;
  89        struct list_head client_list;
  90
  91        struct miscdevice misc;
  92        struct list_head link;
  93        struct kref kref;
  94};
  95
  96static inline struct pcilynx *
  97lynx_get(struct pcilynx *lynx)
  98{
  99        kref_get(&lynx->kref);
 100
 101        return lynx;
 102}
 103
 104static void
 105lynx_release(struct kref *kref)
 106{
 107        kfree(container_of(kref, struct pcilynx, kref));
 108}
 109
 110static inline void
 111lynx_put(struct pcilynx *lynx)
 112{
 113        kref_put(&lynx->kref, lynx_release);
 114}
 115
 116struct client {
 117        struct pcilynx *lynx;
 118        u32 tcode_mask;
 119        struct packet_buffer buffer;
 120        struct list_head link;
 121};
 122
 123static DEFINE_MUTEX(card_mutex);
 124static LIST_HEAD(card_list);
 125
 126static int
 127packet_buffer_init(struct packet_buffer *buffer, size_t capacity)
 128{
 129        buffer->data = kmalloc(capacity, GFP_KERNEL);
 130        if (buffer->data == NULL)
 131                return -ENOMEM;
 132        buffer->head = (struct packet *) buffer->data;
 133        buffer->tail = (struct packet *) buffer->data;
 134        buffer->capacity = capacity;
 135        buffer->lost_packet_count = 0;
 136        atomic_set(&buffer->size, 0);
 137        init_waitqueue_head(&buffer->wait);
 138
 139        return 0;
 140}
 141
 142static void
 143packet_buffer_destroy(struct packet_buffer *buffer)
 144{
 145        kfree(buffer->data);
 146}
 147
 148static int
 149packet_buffer_get(struct client *client, char __user *data, size_t user_length)
 150{
 151        struct packet_buffer *buffer = &client->buffer;
 152        size_t length;
 153        char *end;
 154
 155        if (wait_event_interruptible(buffer->wait,
 156                                     atomic_read(&buffer->size) > 0) ||
 157                                     list_empty(&client->lynx->link))
 158                return -ERESTARTSYS;
 159
 160        if (atomic_read(&buffer->size) == 0)
 161                return -ENODEV;
 162
 163        /* FIXME: Check length <= user_length. */
 164
 165        end = buffer->data + buffer->capacity;
 166        length = buffer->head->length;
 167
 168        if (&buffer->head->data[length] < end) {
 169                if (copy_to_user(data, buffer->head->data, length))
 170                        return -EFAULT;
 171                buffer->head = (struct packet *) &buffer->head->data[length];
 172        } else {
 173                size_t split = end - buffer->head->data;
 174
 175                if (copy_to_user(data, buffer->head->data, split))
 176                        return -EFAULT;
 177                if (copy_to_user(data + split, buffer->data, length - split))
 178                        return -EFAULT;
 179                buffer->head = (struct packet *) &buffer->data[length - split];
 180        }
 181
 182        /*
 183         * Decrease buffer->size as the last thing, since this is what
 184         * keeps the interrupt from overwriting the packet we are
 185         * retrieving from the buffer.
 186         */
 187        atomic_sub(sizeof(struct packet) + length, &buffer->size);
 188
 189        return length;
 190}
 191
 192static void
 193packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length)
 194{
 195        char *end;
 196
 197        buffer->total_packet_count++;
 198
 199        if (buffer->capacity <
 200            atomic_read(&buffer->size) + sizeof(struct packet) + length) {
 201                buffer->lost_packet_count++;
 202                return;
 203        }
 204
 205        end = buffer->data + buffer->capacity;
 206        buffer->tail->length = length;
 207
 208        if (&buffer->tail->data[length] < end) {
 209                memcpy(buffer->tail->data, data, length);
 210                buffer->tail = (struct packet *) &buffer->tail->data[length];
 211        } else {
 212                size_t split = end - buffer->tail->data;
 213
 214                memcpy(buffer->tail->data, data, split);
 215                memcpy(buffer->data, data + split, length - split);
 216                buffer->tail = (struct packet *) &buffer->data[length - split];
 217        }
 218
 219        /* Finally, adjust buffer size and wake up userspace reader. */
 220
 221        atomic_add(sizeof(struct packet) + length, &buffer->size);
 222        wake_up_interruptible(&buffer->wait);
 223}
 224
 225static inline void
 226reg_write(struct pcilynx *lynx, int offset, u32 data)
 227{
 228        writel(data, lynx->registers + offset);
 229}
 230
 231static inline u32
 232reg_read(struct pcilynx *lynx, int offset)
 233{
 234        return readl(lynx->registers + offset);
 235}
 236
 237static inline void
 238reg_set_bits(struct pcilynx *lynx, int offset, u32 mask)
 239{
 240        reg_write(lynx, offset, (reg_read(lynx, offset) | mask));
 241}
 242
 243/*
 244 * Maybe the pcl programs could be set up to just append data instead
 245 * of using a whole packet.
 246 */
 247static inline void
 248run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus,
 249                           int dmachan)
 250{
 251        reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus);
 252        reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20,
 253                  DMA_CHAN_CTRL_ENABLE | DMA_CHAN_CTRL_LINK);
 254}
 255
 256static int
 257set_phy_reg(struct pcilynx *lynx, int addr, int val)
 258{
 259        if (addr > 15) {
 260                dev_err(&lynx->pci_device->dev,
 261                        "PHY register address %d out of range\n", addr);
 262                return -1;
 263        }
 264        if (val > 0xff) {
 265                dev_err(&lynx->pci_device->dev,
 266                        "PHY register value %d out of range\n", val);
 267                return -1;
 268        }
 269        reg_write(lynx, LINK_PHY, LINK_PHY_WRITE |
 270                  LINK_PHY_ADDR(addr) | LINK_PHY_WDATA(val));
 271
 272        return 0;
 273}
 274
 275static int
 276nosy_open(struct inode *inode, struct file *file)
 277{
 278        int minor = iminor(inode);
 279        struct client *client;
 280        struct pcilynx *tmp, *lynx = NULL;
 281
 282        mutex_lock(&card_mutex);
 283        list_for_each_entry(tmp, &card_list, link)
 284                if (tmp->misc.minor == minor) {
 285                        lynx = lynx_get(tmp);
 286                        break;
 287                }
 288        mutex_unlock(&card_mutex);
 289        if (lynx == NULL)
 290                return -ENODEV;
 291
 292        client = kmalloc(sizeof *client, GFP_KERNEL);
 293        if (client == NULL)
 294                goto fail;
 295
 296        client->tcode_mask = ~0;
 297        client->lynx = lynx;
 298        INIT_LIST_HEAD(&client->link);
 299
 300        if (packet_buffer_init(&client->buffer, 128 * 1024) < 0)
 301                goto fail;
 302
 303        file->private_data = client;
 304
 305        return nonseekable_open(inode, file);
 306fail:
 307        kfree(client);
 308        lynx_put(lynx);
 309
 310        return -ENOMEM;
 311}
 312
 313static int
 314nosy_release(struct inode *inode, struct file *file)
 315{
 316        struct client *client = file->private_data;
 317        struct pcilynx *lynx = client->lynx;
 318
 319        spin_lock_irq(&lynx->client_list_lock);
 320        list_del_init(&client->link);
 321        spin_unlock_irq(&lynx->client_list_lock);
 322
 323        packet_buffer_destroy(&client->buffer);
 324        kfree(client);
 325        lynx_put(lynx);
 326
 327        return 0;
 328}
 329
 330static unsigned int
 331nosy_poll(struct file *file, poll_table *pt)
 332{
 333        struct client *client = file->private_data;
 334        unsigned int ret = 0;
 335
 336        poll_wait(file, &client->buffer.wait, pt);
 337
 338        if (atomic_read(&client->buffer.size) > 0)
 339                ret = POLLIN | POLLRDNORM;
 340
 341        if (list_empty(&client->lynx->link))
 342                ret |= POLLHUP;
 343
 344        return ret;
 345}
 346
 347static ssize_t
 348nosy_read(struct file *file, char __user *buffer, size_t count, loff_t *offset)
 349{
 350        struct client *client = file->private_data;
 351
 352        return packet_buffer_get(client, buffer, count);
 353}
 354
 355static long
 356nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 357{
 358        struct client *client = file->private_data;
 359        spinlock_t *client_list_lock = &client->lynx->client_list_lock;
 360        struct nosy_stats stats;
 361
 362        switch (cmd) {
 363        case NOSY_IOC_GET_STATS:
 364                spin_lock_irq(client_list_lock);
 365                stats.total_packet_count = client->buffer.total_packet_count;
 366                stats.lost_packet_count  = client->buffer.lost_packet_count;
 367                spin_unlock_irq(client_list_lock);
 368
 369                if (copy_to_user((void __user *) arg, &stats, sizeof stats))
 370                        return -EFAULT;
 371                else
 372                        return 0;
 373
 374        case NOSY_IOC_START:
 375                spin_lock_irq(client_list_lock);
 376                list_add_tail(&client->link, &client->lynx->client_list);
 377                spin_unlock_irq(client_list_lock);
 378
 379                return 0;
 380
 381        case NOSY_IOC_STOP:
 382                spin_lock_irq(client_list_lock);
 383                list_del_init(&client->link);
 384                spin_unlock_irq(client_list_lock);
 385
 386                return 0;
 387
 388        case NOSY_IOC_FILTER:
 389                spin_lock_irq(client_list_lock);
 390                client->tcode_mask = arg;
 391                spin_unlock_irq(client_list_lock);
 392
 393                return 0;
 394
 395        default:
 396                return -EINVAL;
 397                /* Flush buffer, configure filter. */
 398        }
 399}
 400
 401static const struct file_operations nosy_ops = {
 402        .owner =                THIS_MODULE,
 403        .read =                 nosy_read,
 404        .unlocked_ioctl =       nosy_ioctl,
 405        .poll =                 nosy_poll,
 406        .open =                 nosy_open,
 407        .release =              nosy_release,
 408};
 409
 410#define PHY_PACKET_SIZE 12 /* 1 payload, 1 inverse, 1 ack = 3 quadlets */
 411
 412static void
 413packet_irq_handler(struct pcilynx *lynx)
 414{
 415        struct client *client;
 416        u32 tcode_mask, tcode;
 417        size_t length;
 418        struct timeval tv;
 419
 420        /* FIXME: Also report rcv_speed. */
 421
 422        length = __le32_to_cpu(lynx->rcv_pcl->pcl_status) & 0x00001fff;
 423        tcode  = __le32_to_cpu(lynx->rcv_buffer[1]) >> 4 & 0xf;
 424
 425        do_gettimeofday(&tv);
 426        lynx->rcv_buffer[0] = (__force __le32)tv.tv_usec;
 427
 428        if (length == PHY_PACKET_SIZE)
 429                tcode_mask = 1 << TCODE_PHY_PACKET;
 430        else
 431                tcode_mask = 1 << tcode;
 432
 433        spin_lock(&lynx->client_list_lock);
 434
 435        list_for_each_entry(client, &lynx->client_list, link)
 436                if (client->tcode_mask & tcode_mask)
 437                        packet_buffer_put(&client->buffer,
 438                                          lynx->rcv_buffer, length + 4);
 439
 440        spin_unlock(&lynx->client_list_lock);
 441}
 442
 443static void
 444bus_reset_irq_handler(struct pcilynx *lynx)
 445{
 446        struct client *client;
 447        struct timeval tv;
 448
 449        do_gettimeofday(&tv);
 450
 451        spin_lock(&lynx->client_list_lock);
 452
 453        list_for_each_entry(client, &lynx->client_list, link)
 454                packet_buffer_put(&client->buffer, &tv.tv_usec, 4);
 455
 456        spin_unlock(&lynx->client_list_lock);
 457}
 458
 459static irqreturn_t
 460irq_handler(int irq, void *device)
 461{
 462        struct pcilynx *lynx = device;
 463        u32 pci_int_status;
 464
 465        pci_int_status = reg_read(lynx, PCI_INT_STATUS);
 466
 467        if (pci_int_status == ~0)
 468                /* Card was ejected. */
 469                return IRQ_NONE;
 470
 471        if ((pci_int_status & PCI_INT_INT_PEND) == 0)
 472                /* Not our interrupt, bail out quickly. */
 473                return IRQ_NONE;
 474
 475        if ((pci_int_status & PCI_INT_P1394_INT) != 0) {
 476                u32 link_int_status;
 477
 478                link_int_status = reg_read(lynx, LINK_INT_STATUS);
 479                reg_write(lynx, LINK_INT_STATUS, link_int_status);
 480
 481                if ((link_int_status & LINK_INT_PHY_BUSRESET) > 0)
 482                        bus_reset_irq_handler(lynx);
 483        }
 484
 485        /* Clear the PCI_INT_STATUS register only after clearing the
 486         * LINK_INT_STATUS register; otherwise the PCI_INT_P1394 will
 487         * be set again immediately. */
 488
 489        reg_write(lynx, PCI_INT_STATUS, pci_int_status);
 490
 491        if ((pci_int_status & PCI_INT_DMA0_HLT) > 0) {
 492                packet_irq_handler(lynx);
 493                run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
 494        }
 495
 496        return IRQ_HANDLED;
 497}
 498
 499static void
 500remove_card(struct pci_dev *dev)
 501{
 502        struct pcilynx *lynx = pci_get_drvdata(dev);
 503        struct client *client;
 504
 505        mutex_lock(&card_mutex);
 506        list_del_init(&lynx->link);
 507        misc_deregister(&lynx->misc);
 508        mutex_unlock(&card_mutex);
 509
 510        reg_write(lynx, PCI_INT_ENABLE, 0);
 511        free_irq(lynx->pci_device->irq, lynx);
 512
 513        spin_lock_irq(&lynx->client_list_lock);
 514        list_for_each_entry(client, &lynx->client_list, link)
 515                wake_up_interruptible(&client->buffer.wait);
 516        spin_unlock_irq(&lynx->client_list_lock);
 517
 518        pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
 519                            lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
 520        pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
 521                            lynx->rcv_pcl, lynx->rcv_pcl_bus);
 522        pci_free_consistent(lynx->pci_device, PAGE_SIZE,
 523                            lynx->rcv_buffer, lynx->rcv_buffer_bus);
 524
 525        iounmap(lynx->registers);
 526        pci_disable_device(dev);
 527        lynx_put(lynx);
 528}
 529
 530#define RCV_BUFFER_SIZE (16 * 1024)
 531
 532static int __devinit
 533add_card(struct pci_dev *dev, const struct pci_device_id *unused)
 534{
 535        struct pcilynx *lynx;
 536        u32 p, end;
 537        int ret, i;
 538
 539        if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) {
 540                dev_err(&dev->dev,
 541                    "DMA address limits not supported for PCILynx hardware\n");
 542                return -ENXIO;
 543        }
 544        if (pci_enable_device(dev)) {
 545                dev_err(&dev->dev, "Failed to enable PCILynx hardware\n");
 546                return -ENXIO;
 547        }
 548        pci_set_master(dev);
 549
 550        lynx = kzalloc(sizeof *lynx, GFP_KERNEL);
 551        if (lynx == NULL) {
 552                dev_err(&dev->dev, "Failed to allocate control structure\n");
 553                ret = -ENOMEM;
 554                goto fail_disable;
 555        }
 556        lynx->pci_device = dev;
 557        pci_set_drvdata(dev, lynx);
 558
 559        spin_lock_init(&lynx->client_list_lock);
 560        INIT_LIST_HEAD(&lynx->client_list);
 561        kref_init(&lynx->kref);
 562
 563        lynx->registers = ioremap_nocache(pci_resource_start(dev, 0),
 564                                          PCILYNX_MAX_REGISTER);
 565
 566        lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device,
 567                                sizeof(struct pcl), &lynx->rcv_start_pcl_bus);
 568        lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device,
 569                                sizeof(struct pcl), &lynx->rcv_pcl_bus);
 570        lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device,
 571                                RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus);
 572        if (lynx->rcv_start_pcl == NULL ||
 573            lynx->rcv_pcl == NULL ||
 574            lynx->rcv_buffer == NULL) {
 575                dev_err(&dev->dev, "Failed to allocate receive buffer\n");
 576                ret = -ENOMEM;
 577                goto fail_deallocate;
 578        }
 579        lynx->rcv_start_pcl->next       = cpu_to_le32(lynx->rcv_pcl_bus);
 580        lynx->rcv_pcl->next             = cpu_to_le32(PCL_NEXT_INVALID);
 581        lynx->rcv_pcl->async_error_next = cpu_to_le32(PCL_NEXT_INVALID);
 582
 583        lynx->rcv_pcl->buffer[0].control =
 584                        cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2044);
 585        lynx->rcv_pcl->buffer[0].pointer =
 586                        cpu_to_le32(lynx->rcv_buffer_bus + 4);
 587        p = lynx->rcv_buffer_bus + 2048;
 588        end = lynx->rcv_buffer_bus + RCV_BUFFER_SIZE;
 589        for (i = 1; p < end; i++, p += 2048) {
 590                lynx->rcv_pcl->buffer[i].control =
 591                        cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2048);
 592                lynx->rcv_pcl->buffer[i].pointer = cpu_to_le32(p);
 593        }
 594        lynx->rcv_pcl->buffer[i - 1].control |= cpu_to_le32(PCL_LAST_BUFF);
 595
 596        reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
 597        /* Fix buggy cards with autoboot pin not tied low: */
 598        reg_write(lynx, DMA0_CHAN_CTRL, 0);
 599        reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24);
 600
 601#if 0
 602        /* now, looking for PHY register set */
 603        if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) {
 604                lynx->phyic.reg_1394a = 1;
 605                PRINT(KERN_INFO, lynx->id,
 606                      "found 1394a conform PHY (using extended register set)");
 607                lynx->phyic.vendor = get_phy_vendorid(lynx);
 608                lynx->phyic.product = get_phy_productid(lynx);
 609        } else {
 610                lynx->phyic.reg_1394a = 0;
 611                PRINT(KERN_INFO, lynx->id, "found old 1394 PHY");
 612        }
 613#endif
 614
 615        /* Setup the general receive FIFO max size. */
 616        reg_write(lynx, FIFO_SIZES, 255);
 617
 618        reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL);
 619
 620        reg_write(lynx, LINK_INT_ENABLE,
 621                  LINK_INT_PHY_TIME_OUT | LINK_INT_PHY_REG_RCVD |
 622                  LINK_INT_PHY_BUSRESET | LINK_INT_IT_STUCK |
 623                  LINK_INT_AT_STUCK | LINK_INT_SNTRJ |
 624                  LINK_INT_TC_ERR | LINK_INT_GRF_OVER_FLOW |
 625                  LINK_INT_ITF_UNDER_FLOW | LINK_INT_ATF_UNDER_FLOW);
 626
 627        /* Disable the L flag in self ID packets. */
 628        set_phy_reg(lynx, 4, 0);
 629
 630        /* Put this baby into snoop mode */
 631        reg_set_bits(lynx, LINK_CONTROL, LINK_CONTROL_SNOOP_ENABLE);
 632
 633        run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
 634
 635        if (request_irq(dev->irq, irq_handler, IRQF_SHARED,
 636                        driver_name, lynx)) {
 637                dev_err(&dev->dev,
 638                        "Failed to allocate shared interrupt %d\n", dev->irq);
 639                ret = -EIO;
 640                goto fail_deallocate;
 641        }
 642
 643        lynx->misc.parent = &dev->dev;
 644        lynx->misc.minor = MISC_DYNAMIC_MINOR;
 645        lynx->misc.name = "nosy";
 646        lynx->misc.fops = &nosy_ops;
 647
 648        mutex_lock(&card_mutex);
 649        ret = misc_register(&lynx->misc);
 650        if (ret) {
 651                dev_err(&dev->dev, "Failed to register misc char device\n");
 652                mutex_unlock(&card_mutex);
 653                goto fail_free_irq;
 654        }
 655        list_add_tail(&lynx->link, &card_list);
 656        mutex_unlock(&card_mutex);
 657
 658        dev_info(&dev->dev,
 659                 "Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq);
 660
 661        return 0;
 662
 663fail_free_irq:
 664        reg_write(lynx, PCI_INT_ENABLE, 0);
 665        free_irq(lynx->pci_device->irq, lynx);
 666
 667fail_deallocate:
 668        if (lynx->rcv_start_pcl)
 669                pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
 670                                lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
 671        if (lynx->rcv_pcl)
 672                pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
 673                                lynx->rcv_pcl, lynx->rcv_pcl_bus);
 674        if (lynx->rcv_buffer)
 675                pci_free_consistent(lynx->pci_device, PAGE_SIZE,
 676                                lynx->rcv_buffer, lynx->rcv_buffer_bus);
 677        iounmap(lynx->registers);
 678        kfree(lynx);
 679
 680fail_disable:
 681        pci_disable_device(dev);
 682
 683        return ret;
 684}
 685
 686static struct pci_device_id pci_table[] __devinitdata = {
 687        {
 688                .vendor =    PCI_VENDOR_ID_TI,
 689                .device =    PCI_DEVICE_ID_TI_PCILYNX,
 690                .subvendor = PCI_ANY_ID,
 691                .subdevice = PCI_ANY_ID,
 692        },
 693        { }     /* Terminating entry */
 694};
 695
 696MODULE_DEVICE_TABLE(pci, pci_table);
 697
 698static struct pci_driver lynx_pci_driver = {
 699        .name =         driver_name,
 700        .id_table =     pci_table,
 701        .probe =        add_card,
 702        .remove =       remove_card,
 703};
 704
 705module_pci_driver(lynx_pci_driver);
 706
 707MODULE_AUTHOR("Kristian Hoegsberg");
 708MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers");
 709MODULE_LICENSE("GPL");
 710
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