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 *
lynx_get(struct pcilynx * lynx)98 lynx_get(struct pcilynx *lynx)
99 {
100 kref_get(&lynx->kref);
101
102 return lynx;
103 }
104
105 static void
lynx_release(struct kref * kref)106 lynx_release(struct kref *kref)
107 {
108 kfree(container_of(kref, struct pcilynx, kref));
109 }
110
111 static inline void
lynx_put(struct pcilynx * lynx)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
packet_buffer_init(struct packet_buffer * buffer,size_t capacity)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
packet_buffer_destroy(struct packet_buffer * buffer)144 packet_buffer_destroy(struct packet_buffer *buffer)
145 {
146 kfree(buffer->data);
147 }
148
149 static int
packet_buffer_get(struct client * client,char __user * data,size_t user_length)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
packet_buffer_put(struct packet_buffer * buffer,void * data,size_t length)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
reg_write(struct pcilynx * lynx,int offset,u32 data)227 reg_write(struct pcilynx *lynx, int offset, u32 data)
228 {
229 writel(data, lynx->registers + offset);
230 }
231
232 static inline u32
reg_read(struct pcilynx * lynx,int offset)233 reg_read(struct pcilynx *lynx, int offset)
234 {
235 return readl(lynx->registers + offset);
236 }
237
238 static inline void
reg_set_bits(struct pcilynx * lynx,int offset,u32 mask)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
run_pcl(struct pcilynx * lynx,dma_addr_t pcl_bus,int dmachan)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
set_phy_reg(struct pcilynx * lynx,int addr,int val)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
nosy_open(struct inode * inode,struct file * file)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
nosy_release(struct inode * inode,struct file * file)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
nosy_poll(struct file * file,poll_table * pt)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
nosy_read(struct file * file,char __user * buffer,size_t count,loff_t * offset)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
nosy_ioctl(struct file * file,unsigned int cmd,unsigned long arg)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 int ret;
363
364 switch (cmd) {
365 case NOSY_IOC_GET_STATS:
366 spin_lock_irq(client_list_lock);
367 stats.total_packet_count = client->buffer.total_packet_count;
368 stats.lost_packet_count = client->buffer.lost_packet_count;
369 spin_unlock_irq(client_list_lock);
370
371 if (copy_to_user((void __user *) arg, &stats, sizeof stats))
372 return -EFAULT;
373 else
374 return 0;
375
376 case NOSY_IOC_START:
377 ret = -EBUSY;
378 spin_lock_irq(client_list_lock);
379 if (list_empty(&client->link)) {
380 list_add_tail(&client->link, &client->lynx->client_list);
381 ret = 0;
382 }
383 spin_unlock_irq(client_list_lock);
384
385 return ret;
386
387 case NOSY_IOC_STOP:
388 spin_lock_irq(client_list_lock);
389 list_del_init(&client->link);
390 spin_unlock_irq(client_list_lock);
391
392 return 0;
393
394 case NOSY_IOC_FILTER:
395 spin_lock_irq(client_list_lock);
396 client->tcode_mask = arg;
397 spin_unlock_irq(client_list_lock);
398
399 return 0;
400
401 default:
402 return -EINVAL;
403 /* Flush buffer, configure filter. */
404 }
405 }
406
407 static const struct file_operations nosy_ops = {
408 .owner = THIS_MODULE,
409 .read = nosy_read,
410 .unlocked_ioctl = nosy_ioctl,
411 .poll = nosy_poll,
412 .open = nosy_open,
413 .release = nosy_release,
414 };
415
416 #define PHY_PACKET_SIZE 12 /* 1 payload, 1 inverse, 1 ack = 3 quadlets */
417
418 static void
packet_irq_handler(struct pcilynx * lynx)419 packet_irq_handler(struct pcilynx *lynx)
420 {
421 struct client *client;
422 u32 tcode_mask, tcode, timestamp;
423 size_t length;
424 struct timespec64 ts64;
425
426 /* FIXME: Also report rcv_speed. */
427
428 length = __le32_to_cpu(lynx->rcv_pcl->pcl_status) & 0x00001fff;
429 tcode = __le32_to_cpu(lynx->rcv_buffer[1]) >> 4 & 0xf;
430
431 ktime_get_real_ts64(&ts64);
432 timestamp = ts64.tv_nsec / NSEC_PER_USEC;
433 lynx->rcv_buffer[0] = (__force __le32)timestamp;
434
435 if (length == PHY_PACKET_SIZE)
436 tcode_mask = 1 << TCODE_PHY_PACKET;
437 else
438 tcode_mask = 1 << tcode;
439
440 spin_lock(&lynx->client_list_lock);
441
442 list_for_each_entry(client, &lynx->client_list, link)
443 if (client->tcode_mask & tcode_mask)
444 packet_buffer_put(&client->buffer,
445 lynx->rcv_buffer, length + 4);
446
447 spin_unlock(&lynx->client_list_lock);
448 }
449
450 static void
bus_reset_irq_handler(struct pcilynx * lynx)451 bus_reset_irq_handler(struct pcilynx *lynx)
452 {
453 struct client *client;
454 struct timespec64 ts64;
455 u32 timestamp;
456
457 ktime_get_real_ts64(&ts64);
458 timestamp = ts64.tv_nsec / NSEC_PER_USEC;
459
460 spin_lock(&lynx->client_list_lock);
461
462 list_for_each_entry(client, &lynx->client_list, link)
463 packet_buffer_put(&client->buffer, ×tamp, 4);
464
465 spin_unlock(&lynx->client_list_lock);
466 }
467
468 static irqreturn_t
irq_handler(int irq,void * device)469 irq_handler(int irq, void *device)
470 {
471 struct pcilynx *lynx = device;
472 u32 pci_int_status;
473
474 pci_int_status = reg_read(lynx, PCI_INT_STATUS);
475
476 if (pci_int_status == ~0)
477 /* Card was ejected. */
478 return IRQ_NONE;
479
480 if ((pci_int_status & PCI_INT_INT_PEND) == 0)
481 /* Not our interrupt, bail out quickly. */
482 return IRQ_NONE;
483
484 if ((pci_int_status & PCI_INT_P1394_INT) != 0) {
485 u32 link_int_status;
486
487 link_int_status = reg_read(lynx, LINK_INT_STATUS);
488 reg_write(lynx, LINK_INT_STATUS, link_int_status);
489
490 if ((link_int_status & LINK_INT_PHY_BUSRESET) > 0)
491 bus_reset_irq_handler(lynx);
492 }
493
494 /* Clear the PCI_INT_STATUS register only after clearing the
495 * LINK_INT_STATUS register; otherwise the PCI_INT_P1394 will
496 * be set again immediately. */
497
498 reg_write(lynx, PCI_INT_STATUS, pci_int_status);
499
500 if ((pci_int_status & PCI_INT_DMA0_HLT) > 0) {
501 packet_irq_handler(lynx);
502 run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
503 }
504
505 return IRQ_HANDLED;
506 }
507
508 static void
remove_card(struct pci_dev * dev)509 remove_card(struct pci_dev *dev)
510 {
511 struct pcilynx *lynx = pci_get_drvdata(dev);
512 struct client *client;
513
514 mutex_lock(&card_mutex);
515 list_del_init(&lynx->link);
516 misc_deregister(&lynx->misc);
517 mutex_unlock(&card_mutex);
518
519 reg_write(lynx, PCI_INT_ENABLE, 0);
520 free_irq(lynx->pci_device->irq, lynx);
521
522 spin_lock_irq(&lynx->client_list_lock);
523 list_for_each_entry(client, &lynx->client_list, link)
524 wake_up_interruptible(&client->buffer.wait);
525 spin_unlock_irq(&lynx->client_list_lock);
526
527 pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
528 lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
529 pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
530 lynx->rcv_pcl, lynx->rcv_pcl_bus);
531 pci_free_consistent(lynx->pci_device, PAGE_SIZE,
532 lynx->rcv_buffer, lynx->rcv_buffer_bus);
533
534 iounmap(lynx->registers);
535 pci_disable_device(dev);
536 lynx_put(lynx);
537 }
538
539 #define RCV_BUFFER_SIZE (16 * 1024)
540
541 static int
add_card(struct pci_dev * dev,const struct pci_device_id * unused)542 add_card(struct pci_dev *dev, const struct pci_device_id *unused)
543 {
544 struct pcilynx *lynx;
545 u32 p, end;
546 int ret, i;
547
548 if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) {
549 dev_err(&dev->dev,
550 "DMA address limits not supported for PCILynx hardware\n");
551 return -ENXIO;
552 }
553 if (pci_enable_device(dev)) {
554 dev_err(&dev->dev, "Failed to enable PCILynx hardware\n");
555 return -ENXIO;
556 }
557 pci_set_master(dev);
558
559 lynx = kzalloc(sizeof *lynx, GFP_KERNEL);
560 if (lynx == NULL) {
561 dev_err(&dev->dev, "Failed to allocate control structure\n");
562 ret = -ENOMEM;
563 goto fail_disable;
564 }
565 lynx->pci_device = dev;
566 pci_set_drvdata(dev, lynx);
567
568 spin_lock_init(&lynx->client_list_lock);
569 INIT_LIST_HEAD(&lynx->client_list);
570 kref_init(&lynx->kref);
571
572 lynx->registers = ioremap_nocache(pci_resource_start(dev, 0),
573 PCILYNX_MAX_REGISTER);
574 if (lynx->registers == NULL) {
575 dev_err(&dev->dev, "Failed to map registers\n");
576 ret = -ENOMEM;
577 goto fail_deallocate_lynx;
578 }
579
580 lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device,
581 sizeof(struct pcl), &lynx->rcv_start_pcl_bus);
582 lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device,
583 sizeof(struct pcl), &lynx->rcv_pcl_bus);
584 lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device,
585 RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus);
586 if (lynx->rcv_start_pcl == NULL ||
587 lynx->rcv_pcl == NULL ||
588 lynx->rcv_buffer == NULL) {
589 dev_err(&dev->dev, "Failed to allocate receive buffer\n");
590 ret = -ENOMEM;
591 goto fail_deallocate_buffers;
592 }
593 lynx->rcv_start_pcl->next = cpu_to_le32(lynx->rcv_pcl_bus);
594 lynx->rcv_pcl->next = cpu_to_le32(PCL_NEXT_INVALID);
595 lynx->rcv_pcl->async_error_next = cpu_to_le32(PCL_NEXT_INVALID);
596
597 lynx->rcv_pcl->buffer[0].control =
598 cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2044);
599 lynx->rcv_pcl->buffer[0].pointer =
600 cpu_to_le32(lynx->rcv_buffer_bus + 4);
601 p = lynx->rcv_buffer_bus + 2048;
602 end = lynx->rcv_buffer_bus + RCV_BUFFER_SIZE;
603 for (i = 1; p < end; i++, p += 2048) {
604 lynx->rcv_pcl->buffer[i].control =
605 cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2048);
606 lynx->rcv_pcl->buffer[i].pointer = cpu_to_le32(p);
607 }
608 lynx->rcv_pcl->buffer[i - 1].control |= cpu_to_le32(PCL_LAST_BUFF);
609
610 reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
611 /* Fix buggy cards with autoboot pin not tied low: */
612 reg_write(lynx, DMA0_CHAN_CTRL, 0);
613 reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24);
614
615 #if 0
616 /* now, looking for PHY register set */
617 if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) {
618 lynx->phyic.reg_1394a = 1;
619 PRINT(KERN_INFO, lynx->id,
620 "found 1394a conform PHY (using extended register set)");
621 lynx->phyic.vendor = get_phy_vendorid(lynx);
622 lynx->phyic.product = get_phy_productid(lynx);
623 } else {
624 lynx->phyic.reg_1394a = 0;
625 PRINT(KERN_INFO, lynx->id, "found old 1394 PHY");
626 }
627 #endif
628
629 /* Setup the general receive FIFO max size. */
630 reg_write(lynx, FIFO_SIZES, 255);
631
632 reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL);
633
634 reg_write(lynx, LINK_INT_ENABLE,
635 LINK_INT_PHY_TIME_OUT | LINK_INT_PHY_REG_RCVD |
636 LINK_INT_PHY_BUSRESET | LINK_INT_IT_STUCK |
637 LINK_INT_AT_STUCK | LINK_INT_SNTRJ |
638 LINK_INT_TC_ERR | LINK_INT_GRF_OVER_FLOW |
639 LINK_INT_ITF_UNDER_FLOW | LINK_INT_ATF_UNDER_FLOW);
640
641 /* Disable the L flag in self ID packets. */
642 set_phy_reg(lynx, 4, 0);
643
644 /* Put this baby into snoop mode */
645 reg_set_bits(lynx, LINK_CONTROL, LINK_CONTROL_SNOOP_ENABLE);
646
647 run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
648
649 if (request_irq(dev->irq, irq_handler, IRQF_SHARED,
650 driver_name, lynx)) {
651 dev_err(&dev->dev,
652 "Failed to allocate shared interrupt %d\n", dev->irq);
653 ret = -EIO;
654 goto fail_deallocate_buffers;
655 }
656
657 lynx->misc.parent = &dev->dev;
658 lynx->misc.minor = MISC_DYNAMIC_MINOR;
659 lynx->misc.name = "nosy";
660 lynx->misc.fops = &nosy_ops;
661
662 mutex_lock(&card_mutex);
663 ret = misc_register(&lynx->misc);
664 if (ret) {
665 dev_err(&dev->dev, "Failed to register misc char device\n");
666 mutex_unlock(&card_mutex);
667 goto fail_free_irq;
668 }
669 list_add_tail(&lynx->link, &card_list);
670 mutex_unlock(&card_mutex);
671
672 dev_info(&dev->dev,
673 "Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq);
674
675 return 0;
676
677 fail_free_irq:
678 reg_write(lynx, PCI_INT_ENABLE, 0);
679 free_irq(lynx->pci_device->irq, lynx);
680
681 fail_deallocate_buffers:
682 if (lynx->rcv_start_pcl)
683 pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
684 lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
685 if (lynx->rcv_pcl)
686 pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
687 lynx->rcv_pcl, lynx->rcv_pcl_bus);
688 if (lynx->rcv_buffer)
689 pci_free_consistent(lynx->pci_device, PAGE_SIZE,
690 lynx->rcv_buffer, lynx->rcv_buffer_bus);
691 iounmap(lynx->registers);
692
693 fail_deallocate_lynx:
694 kfree(lynx);
695
696 fail_disable:
697 pci_disable_device(dev);
698
699 return ret;
700 }
701
702 static struct pci_device_id pci_table[] = {
703 {
704 .vendor = PCI_VENDOR_ID_TI,
705 .device = PCI_DEVICE_ID_TI_PCILYNX,
706 .subvendor = PCI_ANY_ID,
707 .subdevice = PCI_ANY_ID,
708 },
709 { } /* Terminating entry */
710 };
711
712 MODULE_DEVICE_TABLE(pci, pci_table);
713
714 static struct pci_driver lynx_pci_driver = {
715 .name = driver_name,
716 .id_table = pci_table,
717 .probe = add_card,
718 .remove = remove_card,
719 };
720
721 module_pci_driver(lynx_pci_driver);
722
723 MODULE_AUTHOR("Kristian Hoegsberg");
724 MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers");
725 MODULE_LICENSE("GPL");
726