a128dd1126ae458c323d7ca6a43293bef05dd14f
[sfrench/cifs-2.6.git] / drivers / firewire / nosy.c
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/time64.h>
37 #include <linux/timex.h>
38 #include <linux/uaccess.h>
39 #include <linux/wait.h>
40 #include <linux/dma-mapping.h>
41 #include <linux/atomic.h>
42 #include <asm/byteorder.h>
43
44 #include "nosy.h"
45 #include "nosy-user.h"
46
47 #define TCODE_PHY_PACKET                0x10
48 #define PCI_DEVICE_ID_TI_PCILYNX        0x8000
49
50 static char driver_name[] = KBUILD_MODNAME;
51
52 /* this is the physical layout of a PCL, its size is 128 bytes */
53 struct pcl {
54         __le32 next;
55         __le32 async_error_next;
56         u32 user_data;
57         __le32 pcl_status;
58         __le32 remaining_transfer_count;
59         __le32 next_data_buffer;
60         struct {
61                 __le32 control;
62                 __le32 pointer;
63         } buffer[13];
64 };
65
66 struct packet {
67         unsigned int length;
68         char data[0];
69 };
70
71 struct packet_buffer {
72         char *data;
73         size_t capacity;
74         long total_packet_count, lost_packet_count;
75         atomic_t size;
76         struct packet *head, *tail;
77         wait_queue_head_t wait;
78 };
79
80 struct pcilynx {
81         struct pci_dev *pci_device;
82         __iomem char *registers;
83
84         struct pcl *rcv_start_pcl, *rcv_pcl;
85         __le32 *rcv_buffer;
86
87         dma_addr_t rcv_start_pcl_bus, rcv_pcl_bus, rcv_buffer_bus;
88
89         spinlock_t client_list_lock;
90         struct list_head client_list;
91
92         struct miscdevice misc;
93         struct list_head link;
94         struct kref kref;
95 };
96
97 static inline struct pcilynx *
98 lynx_get(struct pcilynx *lynx)
99 {
100         kref_get(&lynx->kref);
101
102         return lynx;
103 }
104
105 static void
106 lynx_release(struct kref *kref)
107 {
108         kfree(container_of(kref, struct pcilynx, kref));
109 }
110
111 static inline void
112 lynx_put(struct pcilynx *lynx)
113 {
114         kref_put(&lynx->kref, lynx_release);
115 }
116
117 struct client {
118         struct pcilynx *lynx;
119         u32 tcode_mask;
120         struct packet_buffer buffer;
121         struct list_head link;
122 };
123
124 static DEFINE_MUTEX(card_mutex);
125 static LIST_HEAD(card_list);
126
127 static int
128 packet_buffer_init(struct packet_buffer *buffer, size_t capacity)
129 {
130         buffer->data = kmalloc(capacity, GFP_KERNEL);
131         if (buffer->data == NULL)
132                 return -ENOMEM;
133         buffer->head = (struct packet *) buffer->data;
134         buffer->tail = (struct packet *) buffer->data;
135         buffer->capacity = capacity;
136         buffer->lost_packet_count = 0;
137         atomic_set(&buffer->size, 0);
138         init_waitqueue_head(&buffer->wait);
139
140         return 0;
141 }
142
143 static void
144 packet_buffer_destroy(struct packet_buffer *buffer)
145 {
146         kfree(buffer->data);
147 }
148
149 static int
150 packet_buffer_get(struct client *client, char __user *data, size_t user_length)
151 {
152         struct packet_buffer *buffer = &client->buffer;
153         size_t length;
154         char *end;
155
156         if (wait_event_interruptible(buffer->wait,
157                                      atomic_read(&buffer->size) > 0) ||
158                                      list_empty(&client->lynx->link))
159                 return -ERESTARTSYS;
160
161         if (atomic_read(&buffer->size) == 0)
162                 return -ENODEV;
163
164         /* FIXME: Check length <= user_length. */
165
166         end = buffer->data + buffer->capacity;
167         length = buffer->head->length;
168
169         if (&buffer->head->data[length] < end) {
170                 if (copy_to_user(data, buffer->head->data, length))
171                         return -EFAULT;
172                 buffer->head = (struct packet *) &buffer->head->data[length];
173         } else {
174                 size_t split = end - buffer->head->data;
175
176                 if (copy_to_user(data, buffer->head->data, split))
177                         return -EFAULT;
178                 if (copy_to_user(data + split, buffer->data, length - split))
179                         return -EFAULT;
180                 buffer->head = (struct packet *) &buffer->data[length - split];
181         }
182
183         /*
184          * Decrease buffer->size as the last thing, since this is what
185          * keeps the interrupt from overwriting the packet we are
186          * retrieving from the buffer.
187          */
188         atomic_sub(sizeof(struct packet) + length, &buffer->size);
189
190         return length;
191 }
192
193 static void
194 packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length)
195 {
196         char *end;
197
198         buffer->total_packet_count++;
199
200         if (buffer->capacity <
201             atomic_read(&buffer->size) + sizeof(struct packet) + length) {
202                 buffer->lost_packet_count++;
203                 return;
204         }
205
206         end = buffer->data + buffer->capacity;
207         buffer->tail->length = length;
208
209         if (&buffer->tail->data[length] < end) {
210                 memcpy(buffer->tail->data, data, length);
211                 buffer->tail = (struct packet *) &buffer->tail->data[length];
212         } else {
213                 size_t split = end - buffer->tail->data;
214
215                 memcpy(buffer->tail->data, data, split);
216                 memcpy(buffer->data, data + split, length - split);
217                 buffer->tail = (struct packet *) &buffer->data[length - split];
218         }
219
220         /* Finally, adjust buffer size and wake up userspace reader. */
221
222         atomic_add(sizeof(struct packet) + length, &buffer->size);
223         wake_up_interruptible(&buffer->wait);
224 }
225
226 static inline void
227 reg_write(struct pcilynx *lynx, int offset, u32 data)
228 {
229         writel(data, lynx->registers + offset);
230 }
231
232 static inline u32
233 reg_read(struct pcilynx *lynx, int offset)
234 {
235         return readl(lynx->registers + offset);
236 }
237
238 static inline void
239 reg_set_bits(struct pcilynx *lynx, int offset, u32 mask)
240 {
241         reg_write(lynx, offset, (reg_read(lynx, offset) | mask));
242 }
243
244 /*
245  * Maybe the pcl programs could be set up to just append data instead
246  * of using a whole packet.
247  */
248 static inline void
249 run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus,
250                            int dmachan)
251 {
252         reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus);
253         reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20,
254                   DMA_CHAN_CTRL_ENABLE | DMA_CHAN_CTRL_LINK);
255 }
256
257 static int
258 set_phy_reg(struct pcilynx *lynx, int addr, int val)
259 {
260         if (addr > 15) {
261                 dev_err(&lynx->pci_device->dev,
262                         "PHY register address %d out of range\n", addr);
263                 return -1;
264         }
265         if (val > 0xff) {
266                 dev_err(&lynx->pci_device->dev,
267                         "PHY register value %d out of range\n", val);
268                 return -1;
269         }
270         reg_write(lynx, LINK_PHY, LINK_PHY_WRITE |
271                   LINK_PHY_ADDR(addr) | LINK_PHY_WDATA(val));
272
273         return 0;
274 }
275
276 static int
277 nosy_open(struct inode *inode, struct file *file)
278 {
279         int minor = iminor(inode);
280         struct client *client;
281         struct pcilynx *tmp, *lynx = NULL;
282
283         mutex_lock(&card_mutex);
284         list_for_each_entry(tmp, &card_list, link)
285                 if (tmp->misc.minor == minor) {
286                         lynx = lynx_get(tmp);
287                         break;
288                 }
289         mutex_unlock(&card_mutex);
290         if (lynx == NULL)
291                 return -ENODEV;
292
293         client = kmalloc(sizeof *client, GFP_KERNEL);
294         if (client == NULL)
295                 goto fail;
296
297         client->tcode_mask = ~0;
298         client->lynx = lynx;
299         INIT_LIST_HEAD(&client->link);
300
301         if (packet_buffer_init(&client->buffer, 128 * 1024) < 0)
302                 goto fail;
303
304         file->private_data = client;
305
306         return nonseekable_open(inode, file);
307 fail:
308         kfree(client);
309         lynx_put(lynx);
310
311         return -ENOMEM;
312 }
313
314 static int
315 nosy_release(struct inode *inode, struct file *file)
316 {
317         struct client *client = file->private_data;
318         struct pcilynx *lynx = client->lynx;
319
320         spin_lock_irq(&lynx->client_list_lock);
321         list_del_init(&client->link);
322         spin_unlock_irq(&lynx->client_list_lock);
323
324         packet_buffer_destroy(&client->buffer);
325         kfree(client);
326         lynx_put(lynx);
327
328         return 0;
329 }
330
331 static __poll_t
332 nosy_poll(struct file *file, poll_table *pt)
333 {
334         struct client *client = file->private_data;
335         __poll_t ret = 0;
336
337         poll_wait(file, &client->buffer.wait, pt);
338
339         if (atomic_read(&client->buffer.size) > 0)
340                 ret = EPOLLIN | EPOLLRDNORM;
341
342         if (list_empty(&client->lynx->link))
343                 ret |= EPOLLHUP;
344
345         return ret;
346 }
347
348 static ssize_t
349 nosy_read(struct file *file, char __user *buffer, size_t count, loff_t *offset)
350 {
351         struct client *client = file->private_data;
352
353         return packet_buffer_get(client, buffer, count);
354 }
355
356 static long
357 nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
358 {
359         struct client *client = file->private_data;
360         spinlock_t *client_list_lock = &client->lynx->client_list_lock;
361         struct nosy_stats stats;
362
363         switch (cmd) {
364         case NOSY_IOC_GET_STATS:
365                 spin_lock_irq(client_list_lock);
366                 stats.total_packet_count = client->buffer.total_packet_count;
367                 stats.lost_packet_count  = client->buffer.lost_packet_count;
368                 spin_unlock_irq(client_list_lock);
369
370                 if (copy_to_user((void __user *) arg, &stats, sizeof stats))
371                         return -EFAULT;
372                 else
373                         return 0;
374
375         case NOSY_IOC_START:
376                 spin_lock_irq(client_list_lock);
377                 list_add_tail(&client->link, &client->lynx->client_list);
378                 spin_unlock_irq(client_list_lock);
379
380                 return 0;
381
382         case NOSY_IOC_STOP:
383                 spin_lock_irq(client_list_lock);
384                 list_del_init(&client->link);
385                 spin_unlock_irq(client_list_lock);
386
387                 return 0;
388
389         case NOSY_IOC_FILTER:
390                 spin_lock_irq(client_list_lock);
391                 client->tcode_mask = arg;
392                 spin_unlock_irq(client_list_lock);
393
394                 return 0;
395
396         default:
397                 return -EINVAL;
398                 /* Flush buffer, configure filter. */
399         }
400 }
401
402 static const struct file_operations nosy_ops = {
403         .owner =                THIS_MODULE,
404         .read =                 nosy_read,
405         .unlocked_ioctl =       nosy_ioctl,
406         .poll =                 nosy_poll,
407         .open =                 nosy_open,
408         .release =              nosy_release,
409 };
410
411 #define PHY_PACKET_SIZE 12 /* 1 payload, 1 inverse, 1 ack = 3 quadlets */
412
413 static void
414 packet_irq_handler(struct pcilynx *lynx)
415 {
416         struct client *client;
417         u32 tcode_mask, tcode, timestamp;
418         size_t length;
419         struct timespec64 ts64;
420
421         /* FIXME: Also report rcv_speed. */
422
423         length = __le32_to_cpu(lynx->rcv_pcl->pcl_status) & 0x00001fff;
424         tcode  = __le32_to_cpu(lynx->rcv_buffer[1]) >> 4 & 0xf;
425
426         ktime_get_real_ts64(&ts64);
427         timestamp = ts64.tv_nsec / NSEC_PER_USEC;
428         lynx->rcv_buffer[0] = (__force __le32)timestamp;
429
430         if (length == PHY_PACKET_SIZE)
431                 tcode_mask = 1 << TCODE_PHY_PACKET;
432         else
433                 tcode_mask = 1 << tcode;
434
435         spin_lock(&lynx->client_list_lock);
436
437         list_for_each_entry(client, &lynx->client_list, link)
438                 if (client->tcode_mask & tcode_mask)
439                         packet_buffer_put(&client->buffer,
440                                           lynx->rcv_buffer, length + 4);
441
442         spin_unlock(&lynx->client_list_lock);
443 }
444
445 static void
446 bus_reset_irq_handler(struct pcilynx *lynx)
447 {
448         struct client *client;
449         struct timespec64 ts64;
450         u32    timestamp;
451
452         ktime_get_real_ts64(&ts64);
453         timestamp = ts64.tv_nsec / NSEC_PER_USEC;
454
455         spin_lock(&lynx->client_list_lock);
456
457         list_for_each_entry(client, &lynx->client_list, link)
458                 packet_buffer_put(&client->buffer, &timestamp, 4);
459
460         spin_unlock(&lynx->client_list_lock);
461 }
462
463 static irqreturn_t
464 irq_handler(int irq, void *device)
465 {
466         struct pcilynx *lynx = device;
467         u32 pci_int_status;
468
469         pci_int_status = reg_read(lynx, PCI_INT_STATUS);
470
471         if (pci_int_status == ~0)
472                 /* Card was ejected. */
473                 return IRQ_NONE;
474
475         if ((pci_int_status & PCI_INT_INT_PEND) == 0)
476                 /* Not our interrupt, bail out quickly. */
477                 return IRQ_NONE;
478
479         if ((pci_int_status & PCI_INT_P1394_INT) != 0) {
480                 u32 link_int_status;
481
482                 link_int_status = reg_read(lynx, LINK_INT_STATUS);
483                 reg_write(lynx, LINK_INT_STATUS, link_int_status);
484
485                 if ((link_int_status & LINK_INT_PHY_BUSRESET) > 0)
486                         bus_reset_irq_handler(lynx);
487         }
488
489         /* Clear the PCI_INT_STATUS register only after clearing the
490          * LINK_INT_STATUS register; otherwise the PCI_INT_P1394 will
491          * be set again immediately. */
492
493         reg_write(lynx, PCI_INT_STATUS, pci_int_status);
494
495         if ((pci_int_status & PCI_INT_DMA0_HLT) > 0) {
496                 packet_irq_handler(lynx);
497                 run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
498         }
499
500         return IRQ_HANDLED;
501 }
502
503 static void
504 remove_card(struct pci_dev *dev)
505 {
506         struct pcilynx *lynx = pci_get_drvdata(dev);
507         struct client *client;
508
509         mutex_lock(&card_mutex);
510         list_del_init(&lynx->link);
511         misc_deregister(&lynx->misc);
512         mutex_unlock(&card_mutex);
513
514         reg_write(lynx, PCI_INT_ENABLE, 0);
515         free_irq(lynx->pci_device->irq, lynx);
516
517         spin_lock_irq(&lynx->client_list_lock);
518         list_for_each_entry(client, &lynx->client_list, link)
519                 wake_up_interruptible(&client->buffer.wait);
520         spin_unlock_irq(&lynx->client_list_lock);
521
522         pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
523                             lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
524         pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
525                             lynx->rcv_pcl, lynx->rcv_pcl_bus);
526         pci_free_consistent(lynx->pci_device, PAGE_SIZE,
527                             lynx->rcv_buffer, lynx->rcv_buffer_bus);
528
529         iounmap(lynx->registers);
530         pci_disable_device(dev);
531         lynx_put(lynx);
532 }
533
534 #define RCV_BUFFER_SIZE (16 * 1024)
535
536 static int
537 add_card(struct pci_dev *dev, const struct pci_device_id *unused)
538 {
539         struct pcilynx *lynx;
540         u32 p, end;
541         int ret, i;
542
543         if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) {
544                 dev_err(&dev->dev,
545                     "DMA address limits not supported for PCILynx hardware\n");
546                 return -ENXIO;
547         }
548         if (pci_enable_device(dev)) {
549                 dev_err(&dev->dev, "Failed to enable PCILynx hardware\n");
550                 return -ENXIO;
551         }
552         pci_set_master(dev);
553
554         lynx = kzalloc(sizeof *lynx, GFP_KERNEL);
555         if (lynx == NULL) {
556                 dev_err(&dev->dev, "Failed to allocate control structure\n");
557                 ret = -ENOMEM;
558                 goto fail_disable;
559         }
560         lynx->pci_device = dev;
561         pci_set_drvdata(dev, lynx);
562
563         spin_lock_init(&lynx->client_list_lock);
564         INIT_LIST_HEAD(&lynx->client_list);
565         kref_init(&lynx->kref);
566
567         lynx->registers = ioremap_nocache(pci_resource_start(dev, 0),
568                                           PCILYNX_MAX_REGISTER);
569         if (lynx->registers == NULL) {
570                 dev_err(&dev->dev, "Failed to map registers\n");
571                 ret = -ENOMEM;
572                 goto fail_deallocate_lynx;
573         }
574
575         lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device,
576                                 sizeof(struct pcl), &lynx->rcv_start_pcl_bus);
577         lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device,
578                                 sizeof(struct pcl), &lynx->rcv_pcl_bus);
579         lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device,
580                                 RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus);
581         if (lynx->rcv_start_pcl == NULL ||
582             lynx->rcv_pcl == NULL ||
583             lynx->rcv_buffer == NULL) {
584                 dev_err(&dev->dev, "Failed to allocate receive buffer\n");
585                 ret = -ENOMEM;
586                 goto fail_deallocate_buffers;
587         }
588         lynx->rcv_start_pcl->next       = cpu_to_le32(lynx->rcv_pcl_bus);
589         lynx->rcv_pcl->next             = cpu_to_le32(PCL_NEXT_INVALID);
590         lynx->rcv_pcl->async_error_next = cpu_to_le32(PCL_NEXT_INVALID);
591
592         lynx->rcv_pcl->buffer[0].control =
593                         cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2044);
594         lynx->rcv_pcl->buffer[0].pointer =
595                         cpu_to_le32(lynx->rcv_buffer_bus + 4);
596         p = lynx->rcv_buffer_bus + 2048;
597         end = lynx->rcv_buffer_bus + RCV_BUFFER_SIZE;
598         for (i = 1; p < end; i++, p += 2048) {
599                 lynx->rcv_pcl->buffer[i].control =
600                         cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2048);
601                 lynx->rcv_pcl->buffer[i].pointer = cpu_to_le32(p);
602         }
603         lynx->rcv_pcl->buffer[i - 1].control |= cpu_to_le32(PCL_LAST_BUFF);
604
605         reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
606         /* Fix buggy cards with autoboot pin not tied low: */
607         reg_write(lynx, DMA0_CHAN_CTRL, 0);
608         reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24);
609
610 #if 0
611         /* now, looking for PHY register set */
612         if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) {
613                 lynx->phyic.reg_1394a = 1;
614                 PRINT(KERN_INFO, lynx->id,
615                       "found 1394a conform PHY (using extended register set)");
616                 lynx->phyic.vendor = get_phy_vendorid(lynx);
617                 lynx->phyic.product = get_phy_productid(lynx);
618         } else {
619                 lynx->phyic.reg_1394a = 0;
620                 PRINT(KERN_INFO, lynx->id, "found old 1394 PHY");
621         }
622 #endif
623
624         /* Setup the general receive FIFO max size. */
625         reg_write(lynx, FIFO_SIZES, 255);
626
627         reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL);
628
629         reg_write(lynx, LINK_INT_ENABLE,
630                   LINK_INT_PHY_TIME_OUT | LINK_INT_PHY_REG_RCVD |
631                   LINK_INT_PHY_BUSRESET | LINK_INT_IT_STUCK |
632                   LINK_INT_AT_STUCK | LINK_INT_SNTRJ |
633                   LINK_INT_TC_ERR | LINK_INT_GRF_OVER_FLOW |
634                   LINK_INT_ITF_UNDER_FLOW | LINK_INT_ATF_UNDER_FLOW);
635
636         /* Disable the L flag in self ID packets. */
637         set_phy_reg(lynx, 4, 0);
638
639         /* Put this baby into snoop mode */
640         reg_set_bits(lynx, LINK_CONTROL, LINK_CONTROL_SNOOP_ENABLE);
641
642         run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
643
644         if (request_irq(dev->irq, irq_handler, IRQF_SHARED,
645                         driver_name, lynx)) {
646                 dev_err(&dev->dev,
647                         "Failed to allocate shared interrupt %d\n", dev->irq);
648                 ret = -EIO;
649                 goto fail_deallocate_buffers;
650         }
651
652         lynx->misc.parent = &dev->dev;
653         lynx->misc.minor = MISC_DYNAMIC_MINOR;
654         lynx->misc.name = "nosy";
655         lynx->misc.fops = &nosy_ops;
656
657         mutex_lock(&card_mutex);
658         ret = misc_register(&lynx->misc);
659         if (ret) {
660                 dev_err(&dev->dev, "Failed to register misc char device\n");
661                 mutex_unlock(&card_mutex);
662                 goto fail_free_irq;
663         }
664         list_add_tail(&lynx->link, &card_list);
665         mutex_unlock(&card_mutex);
666
667         dev_info(&dev->dev,
668                  "Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq);
669
670         return 0;
671
672 fail_free_irq:
673         reg_write(lynx, PCI_INT_ENABLE, 0);
674         free_irq(lynx->pci_device->irq, lynx);
675
676 fail_deallocate_buffers:
677         if (lynx->rcv_start_pcl)
678                 pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
679                                 lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
680         if (lynx->rcv_pcl)
681                 pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
682                                 lynx->rcv_pcl, lynx->rcv_pcl_bus);
683         if (lynx->rcv_buffer)
684                 pci_free_consistent(lynx->pci_device, PAGE_SIZE,
685                                 lynx->rcv_buffer, lynx->rcv_buffer_bus);
686         iounmap(lynx->registers);
687
688 fail_deallocate_lynx:
689         kfree(lynx);
690
691 fail_disable:
692         pci_disable_device(dev);
693
694         return ret;
695 }
696
697 static struct pci_device_id pci_table[] = {
698         {
699                 .vendor =    PCI_VENDOR_ID_TI,
700                 .device =    PCI_DEVICE_ID_TI_PCILYNX,
701                 .subvendor = PCI_ANY_ID,
702                 .subdevice = PCI_ANY_ID,
703         },
704         { }     /* Terminating entry */
705 };
706
707 MODULE_DEVICE_TABLE(pci, pci_table);
708
709 static struct pci_driver lynx_pci_driver = {
710         .name =         driver_name,
711         .id_table =     pci_table,
712         .probe =        add_card,
713         .remove =       remove_card,
714 };
715
716 module_pci_driver(lynx_pci_driver);
717
718 MODULE_AUTHOR("Kristian Hoegsberg");
719 MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers");
720 MODULE_LICENSE("GPL");