xref: /openbmc/linux/drivers/firewire/nosy.c (revision 249592bf)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * nosy - Snoop mode driver for TI PCILynx 1394 controllers
4  * Copyright (C) 2002-2007 Kristian Høgsberg
5  */
6 
7 #include <linux/device.h>
8 #include <linux/errno.h>
9 #include <linux/fs.h>
10 #include <linux/init.h>
11 #include <linux/interrupt.h>
12 #include <linux/io.h>
13 #include <linux/kernel.h>
14 #include <linux/kref.h>
15 #include <linux/miscdevice.h>
16 #include <linux/module.h>
17 #include <linux/mutex.h>
18 #include <linux/pci.h>
19 #include <linux/poll.h>
20 #include <linux/sched.h> /* required for linux/wait.h */
21 #include <linux/slab.h>
22 #include <linux/spinlock.h>
23 #include <linux/time64.h>
24 #include <linux/timex.h>
25 #include <linux/uaccess.h>
26 #include <linux/wait.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/atomic.h>
29 #include <asm/byteorder.h>
30 
31 #include "nosy.h"
32 #include "nosy-user.h"
33 
34 #define TCODE_PHY_PACKET		0x10
35 #define PCI_DEVICE_ID_TI_PCILYNX	0x8000
36 
37 static char driver_name[] = KBUILD_MODNAME;
38 
39 /* this is the physical layout of a PCL, its size is 128 bytes */
40 struct pcl {
41 	__le32 next;
42 	__le32 async_error_next;
43 	u32 user_data;
44 	__le32 pcl_status;
45 	__le32 remaining_transfer_count;
46 	__le32 next_data_buffer;
47 	struct {
48 		__le32 control;
49 		__le32 pointer;
50 	} buffer[13];
51 };
52 
53 struct packet {
54 	unsigned int length;
55 	char data[];
56 };
57 
58 struct packet_buffer {
59 	char *data;
60 	size_t capacity;
61 	long total_packet_count, lost_packet_count;
62 	atomic_t size;
63 	struct packet *head, *tail;
64 	wait_queue_head_t wait;
65 };
66 
67 struct pcilynx {
68 	struct pci_dev *pci_device;
69 	__iomem char *registers;
70 
71 	struct pcl *rcv_start_pcl, *rcv_pcl;
72 	__le32 *rcv_buffer;
73 
74 	dma_addr_t rcv_start_pcl_bus, rcv_pcl_bus, rcv_buffer_bus;
75 
76 	spinlock_t client_list_lock;
77 	struct list_head client_list;
78 
79 	struct miscdevice misc;
80 	struct list_head link;
81 	struct kref kref;
82 };
83 
84 static inline struct pcilynx *
85 lynx_get(struct pcilynx *lynx)
86 {
87 	kref_get(&lynx->kref);
88 
89 	return lynx;
90 }
91 
92 static void
93 lynx_release(struct kref *kref)
94 {
95 	kfree(container_of(kref, struct pcilynx, kref));
96 }
97 
98 static inline void
99 lynx_put(struct pcilynx *lynx)
100 {
101 	kref_put(&lynx->kref, lynx_release);
102 }
103 
104 struct client {
105 	struct pcilynx *lynx;
106 	u32 tcode_mask;
107 	struct packet_buffer buffer;
108 	struct list_head link;
109 };
110 
111 static DEFINE_MUTEX(card_mutex);
112 static LIST_HEAD(card_list);
113 
114 static int
115 packet_buffer_init(struct packet_buffer *buffer, size_t capacity)
116 {
117 	buffer->data = kmalloc(capacity, GFP_KERNEL);
118 	if (buffer->data == NULL)
119 		return -ENOMEM;
120 	buffer->head = (struct packet *) buffer->data;
121 	buffer->tail = (struct packet *) buffer->data;
122 	buffer->capacity = capacity;
123 	buffer->lost_packet_count = 0;
124 	atomic_set(&buffer->size, 0);
125 	init_waitqueue_head(&buffer->wait);
126 
127 	return 0;
128 }
129 
130 static void
131 packet_buffer_destroy(struct packet_buffer *buffer)
132 {
133 	kfree(buffer->data);
134 }
135 
136 static int
137 packet_buffer_get(struct client *client, char __user *data, size_t user_length)
138 {
139 	struct packet_buffer *buffer = &client->buffer;
140 	size_t length;
141 	char *end;
142 
143 	if (wait_event_interruptible(buffer->wait,
144 				     atomic_read(&buffer->size) > 0) ||
145 				     list_empty(&client->lynx->link))
146 		return -ERESTARTSYS;
147 
148 	if (atomic_read(&buffer->size) == 0)
149 		return -ENODEV;
150 
151 	/* FIXME: Check length <= user_length. */
152 
153 	end = buffer->data + buffer->capacity;
154 	length = buffer->head->length;
155 
156 	if (&buffer->head->data[length] < end) {
157 		if (copy_to_user(data, buffer->head->data, length))
158 			return -EFAULT;
159 		buffer->head = (struct packet *) &buffer->head->data[length];
160 	} else {
161 		size_t split = end - buffer->head->data;
162 
163 		if (copy_to_user(data, buffer->head->data, split))
164 			return -EFAULT;
165 		if (copy_to_user(data + split, buffer->data, length - split))
166 			return -EFAULT;
167 		buffer->head = (struct packet *) &buffer->data[length - split];
168 	}
169 
170 	/*
171 	 * Decrease buffer->size as the last thing, since this is what
172 	 * keeps the interrupt from overwriting the packet we are
173 	 * retrieving from the buffer.
174 	 */
175 	atomic_sub(sizeof(struct packet) + length, &buffer->size);
176 
177 	return length;
178 }
179 
180 static void
181 packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length)
182 {
183 	char *end;
184 
185 	buffer->total_packet_count++;
186 
187 	if (buffer->capacity <
188 	    atomic_read(&buffer->size) + sizeof(struct packet) + length) {
189 		buffer->lost_packet_count++;
190 		return;
191 	}
192 
193 	end = buffer->data + buffer->capacity;
194 	buffer->tail->length = length;
195 
196 	if (&buffer->tail->data[length] < end) {
197 		memcpy(buffer->tail->data, data, length);
198 		buffer->tail = (struct packet *) &buffer->tail->data[length];
199 	} else {
200 		size_t split = end - buffer->tail->data;
201 
202 		memcpy(buffer->tail->data, data, split);
203 		memcpy(buffer->data, data + split, length - split);
204 		buffer->tail = (struct packet *) &buffer->data[length - split];
205 	}
206 
207 	/* Finally, adjust buffer size and wake up userspace reader. */
208 
209 	atomic_add(sizeof(struct packet) + length, &buffer->size);
210 	wake_up_interruptible(&buffer->wait);
211 }
212 
213 static inline void
214 reg_write(struct pcilynx *lynx, int offset, u32 data)
215 {
216 	writel(data, lynx->registers + offset);
217 }
218 
219 static inline u32
220 reg_read(struct pcilynx *lynx, int offset)
221 {
222 	return readl(lynx->registers + offset);
223 }
224 
225 static inline void
226 reg_set_bits(struct pcilynx *lynx, int offset, u32 mask)
227 {
228 	reg_write(lynx, offset, (reg_read(lynx, offset) | mask));
229 }
230 
231 /*
232  * Maybe the pcl programs could be set up to just append data instead
233  * of using a whole packet.
234  */
235 static inline void
236 run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus,
237 			   int dmachan)
238 {
239 	reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus);
240 	reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20,
241 		  DMA_CHAN_CTRL_ENABLE | DMA_CHAN_CTRL_LINK);
242 }
243 
244 static int
245 set_phy_reg(struct pcilynx *lynx, int addr, int val)
246 {
247 	if (addr > 15) {
248 		dev_err(&lynx->pci_device->dev,
249 			"PHY register address %d out of range\n", addr);
250 		return -1;
251 	}
252 	if (val > 0xff) {
253 		dev_err(&lynx->pci_device->dev,
254 			"PHY register value %d out of range\n", val);
255 		return -1;
256 	}
257 	reg_write(lynx, LINK_PHY, LINK_PHY_WRITE |
258 		  LINK_PHY_ADDR(addr) | LINK_PHY_WDATA(val));
259 
260 	return 0;
261 }
262 
263 static int
264 nosy_open(struct inode *inode, struct file *file)
265 {
266 	int minor = iminor(inode);
267 	struct client *client;
268 	struct pcilynx *tmp, *lynx = NULL;
269 
270 	mutex_lock(&card_mutex);
271 	list_for_each_entry(tmp, &card_list, link)
272 		if (tmp->misc.minor == minor) {
273 			lynx = lynx_get(tmp);
274 			break;
275 		}
276 	mutex_unlock(&card_mutex);
277 	if (lynx == NULL)
278 		return -ENODEV;
279 
280 	client = kmalloc(sizeof *client, GFP_KERNEL);
281 	if (client == NULL)
282 		goto fail;
283 
284 	client->tcode_mask = ~0;
285 	client->lynx = lynx;
286 	INIT_LIST_HEAD(&client->link);
287 
288 	if (packet_buffer_init(&client->buffer, 128 * 1024) < 0)
289 		goto fail;
290 
291 	file->private_data = client;
292 
293 	return stream_open(inode, file);
294 fail:
295 	kfree(client);
296 	lynx_put(lynx);
297 
298 	return -ENOMEM;
299 }
300 
301 static int
302 nosy_release(struct inode *inode, struct file *file)
303 {
304 	struct client *client = file->private_data;
305 	struct pcilynx *lynx = client->lynx;
306 
307 	spin_lock_irq(&lynx->client_list_lock);
308 	list_del_init(&client->link);
309 	spin_unlock_irq(&lynx->client_list_lock);
310 
311 	packet_buffer_destroy(&client->buffer);
312 	kfree(client);
313 	lynx_put(lynx);
314 
315 	return 0;
316 }
317 
318 static __poll_t
319 nosy_poll(struct file *file, poll_table *pt)
320 {
321 	struct client *client = file->private_data;
322 	__poll_t ret = 0;
323 
324 	poll_wait(file, &client->buffer.wait, pt);
325 
326 	if (atomic_read(&client->buffer.size) > 0)
327 		ret = EPOLLIN | EPOLLRDNORM;
328 
329 	if (list_empty(&client->lynx->link))
330 		ret |= EPOLLHUP;
331 
332 	return ret;
333 }
334 
335 static ssize_t
336 nosy_read(struct file *file, char __user *buffer, size_t count, loff_t *offset)
337 {
338 	struct client *client = file->private_data;
339 
340 	return packet_buffer_get(client, buffer, count);
341 }
342 
343 static long
344 nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
345 {
346 	struct client *client = file->private_data;
347 	spinlock_t *client_list_lock = &client->lynx->client_list_lock;
348 	struct nosy_stats stats;
349 	int ret;
350 
351 	switch (cmd) {
352 	case NOSY_IOC_GET_STATS:
353 		spin_lock_irq(client_list_lock);
354 		stats.total_packet_count = client->buffer.total_packet_count;
355 		stats.lost_packet_count  = client->buffer.lost_packet_count;
356 		spin_unlock_irq(client_list_lock);
357 
358 		if (copy_to_user((void __user *) arg, &stats, sizeof stats))
359 			return -EFAULT;
360 		else
361 			return 0;
362 
363 	case NOSY_IOC_START:
364 		ret = -EBUSY;
365 		spin_lock_irq(client_list_lock);
366 		if (list_empty(&client->link)) {
367 			list_add_tail(&client->link, &client->lynx->client_list);
368 			ret = 0;
369 		}
370 		spin_unlock_irq(client_list_lock);
371 
372 		return ret;
373 
374 	case NOSY_IOC_STOP:
375 		spin_lock_irq(client_list_lock);
376 		list_del_init(&client->link);
377 		spin_unlock_irq(client_list_lock);
378 
379 		return 0;
380 
381 	case NOSY_IOC_FILTER:
382 		spin_lock_irq(client_list_lock);
383 		client->tcode_mask = arg;
384 		spin_unlock_irq(client_list_lock);
385 
386 		return 0;
387 
388 	default:
389 		return -EINVAL;
390 		/* Flush buffer, configure filter. */
391 	}
392 }
393 
394 static const struct file_operations nosy_ops = {
395 	.owner =		THIS_MODULE,
396 	.read =			nosy_read,
397 	.unlocked_ioctl =	nosy_ioctl,
398 	.poll =			nosy_poll,
399 	.open =			nosy_open,
400 	.release =		nosy_release,
401 };
402 
403 #define PHY_PACKET_SIZE 12 /* 1 payload, 1 inverse, 1 ack = 3 quadlets */
404 
405 static void
406 packet_irq_handler(struct pcilynx *lynx)
407 {
408 	struct client *client;
409 	u32 tcode_mask, tcode, timestamp;
410 	size_t length;
411 	struct timespec64 ts64;
412 
413 	/* FIXME: Also report rcv_speed. */
414 
415 	length = __le32_to_cpu(lynx->rcv_pcl->pcl_status) & 0x00001fff;
416 	tcode  = __le32_to_cpu(lynx->rcv_buffer[1]) >> 4 & 0xf;
417 
418 	ktime_get_real_ts64(&ts64);
419 	timestamp = ts64.tv_nsec / NSEC_PER_USEC;
420 	lynx->rcv_buffer[0] = (__force __le32)timestamp;
421 
422 	if (length == PHY_PACKET_SIZE)
423 		tcode_mask = 1 << TCODE_PHY_PACKET;
424 	else
425 		tcode_mask = 1 << tcode;
426 
427 	spin_lock(&lynx->client_list_lock);
428 
429 	list_for_each_entry(client, &lynx->client_list, link)
430 		if (client->tcode_mask & tcode_mask)
431 			packet_buffer_put(&client->buffer,
432 					  lynx->rcv_buffer, length + 4);
433 
434 	spin_unlock(&lynx->client_list_lock);
435 }
436 
437 static void
438 bus_reset_irq_handler(struct pcilynx *lynx)
439 {
440 	struct client *client;
441 	struct timespec64 ts64;
442 	u32    timestamp;
443 
444 	ktime_get_real_ts64(&ts64);
445 	timestamp = ts64.tv_nsec / NSEC_PER_USEC;
446 
447 	spin_lock(&lynx->client_list_lock);
448 
449 	list_for_each_entry(client, &lynx->client_list, link)
450 		packet_buffer_put(&client->buffer, &timestamp, 4);
451 
452 	spin_unlock(&lynx->client_list_lock);
453 }
454 
455 static irqreturn_t
456 irq_handler(int irq, void *device)
457 {
458 	struct pcilynx *lynx = device;
459 	u32 pci_int_status;
460 
461 	pci_int_status = reg_read(lynx, PCI_INT_STATUS);
462 
463 	if (pci_int_status == ~0)
464 		/* Card was ejected. */
465 		return IRQ_NONE;
466 
467 	if ((pci_int_status & PCI_INT_INT_PEND) == 0)
468 		/* Not our interrupt, bail out quickly. */
469 		return IRQ_NONE;
470 
471 	if ((pci_int_status & PCI_INT_P1394_INT) != 0) {
472 		u32 link_int_status;
473 
474 		link_int_status = reg_read(lynx, LINK_INT_STATUS);
475 		reg_write(lynx, LINK_INT_STATUS, link_int_status);
476 
477 		if ((link_int_status & LINK_INT_PHY_BUSRESET) > 0)
478 			bus_reset_irq_handler(lynx);
479 	}
480 
481 	/* Clear the PCI_INT_STATUS register only after clearing the
482 	 * LINK_INT_STATUS register; otherwise the PCI_INT_P1394 will
483 	 * be set again immediately. */
484 
485 	reg_write(lynx, PCI_INT_STATUS, pci_int_status);
486 
487 	if ((pci_int_status & PCI_INT_DMA0_HLT) > 0) {
488 		packet_irq_handler(lynx);
489 		run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
490 	}
491 
492 	return IRQ_HANDLED;
493 }
494 
495 static void
496 remove_card(struct pci_dev *dev)
497 {
498 	struct pcilynx *lynx = pci_get_drvdata(dev);
499 	struct client *client;
500 
501 	mutex_lock(&card_mutex);
502 	list_del_init(&lynx->link);
503 	misc_deregister(&lynx->misc);
504 	mutex_unlock(&card_mutex);
505 
506 	reg_write(lynx, PCI_INT_ENABLE, 0);
507 	free_irq(lynx->pci_device->irq, lynx);
508 
509 	spin_lock_irq(&lynx->client_list_lock);
510 	list_for_each_entry(client, &lynx->client_list, link)
511 		wake_up_interruptible(&client->buffer.wait);
512 	spin_unlock_irq(&lynx->client_list_lock);
513 
514 	pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
515 			    lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
516 	pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
517 			    lynx->rcv_pcl, lynx->rcv_pcl_bus);
518 	pci_free_consistent(lynx->pci_device, PAGE_SIZE,
519 			    lynx->rcv_buffer, lynx->rcv_buffer_bus);
520 
521 	iounmap(lynx->registers);
522 	pci_disable_device(dev);
523 	lynx_put(lynx);
524 }
525 
526 #define RCV_BUFFER_SIZE (16 * 1024)
527 
528 static int
529 add_card(struct pci_dev *dev, const struct pci_device_id *unused)
530 {
531 	struct pcilynx *lynx;
532 	u32 p, end;
533 	int ret, i;
534 
535 	if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) {
536 		dev_err(&dev->dev,
537 		    "DMA address limits not supported for PCILynx hardware\n");
538 		return -ENXIO;
539 	}
540 	if (pci_enable_device(dev)) {
541 		dev_err(&dev->dev, "Failed to enable PCILynx hardware\n");
542 		return -ENXIO;
543 	}
544 	pci_set_master(dev);
545 
546 	lynx = kzalloc(sizeof *lynx, GFP_KERNEL);
547 	if (lynx == NULL) {
548 		dev_err(&dev->dev, "Failed to allocate control structure\n");
549 		ret = -ENOMEM;
550 		goto fail_disable;
551 	}
552 	lynx->pci_device = dev;
553 	pci_set_drvdata(dev, lynx);
554 
555 	spin_lock_init(&lynx->client_list_lock);
556 	INIT_LIST_HEAD(&lynx->client_list);
557 	kref_init(&lynx->kref);
558 
559 	lynx->registers = ioremap(pci_resource_start(dev, 0),
560 					  PCILYNX_MAX_REGISTER);
561 	if (lynx->registers == NULL) {
562 		dev_err(&dev->dev, "Failed to map registers\n");
563 		ret = -ENOMEM;
564 		goto fail_deallocate_lynx;
565 	}
566 
567 	lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device,
568 				sizeof(struct pcl), &lynx->rcv_start_pcl_bus);
569 	lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device,
570 				sizeof(struct pcl), &lynx->rcv_pcl_bus);
571 	lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device,
572 				RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus);
573 	if (lynx->rcv_start_pcl == NULL ||
574 	    lynx->rcv_pcl == NULL ||
575 	    lynx->rcv_buffer == NULL) {
576 		dev_err(&dev->dev, "Failed to allocate receive buffer\n");
577 		ret = -ENOMEM;
578 		goto fail_deallocate_buffers;
579 	}
580 	lynx->rcv_start_pcl->next	= cpu_to_le32(lynx->rcv_pcl_bus);
581 	lynx->rcv_pcl->next		= cpu_to_le32(PCL_NEXT_INVALID);
582 	lynx->rcv_pcl->async_error_next	= cpu_to_le32(PCL_NEXT_INVALID);
583 
584 	lynx->rcv_pcl->buffer[0].control =
585 			cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2044);
586 	lynx->rcv_pcl->buffer[0].pointer =
587 			cpu_to_le32(lynx->rcv_buffer_bus + 4);
588 	p = lynx->rcv_buffer_bus + 2048;
589 	end = lynx->rcv_buffer_bus + RCV_BUFFER_SIZE;
590 	for (i = 1; p < end; i++, p += 2048) {
591 		lynx->rcv_pcl->buffer[i].control =
592 			cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2048);
593 		lynx->rcv_pcl->buffer[i].pointer = cpu_to_le32(p);
594 	}
595 	lynx->rcv_pcl->buffer[i - 1].control |= cpu_to_le32(PCL_LAST_BUFF);
596 
597 	reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
598 	/* Fix buggy cards with autoboot pin not tied low: */
599 	reg_write(lynx, DMA0_CHAN_CTRL, 0);
600 	reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24);
601 
602 #if 0
603 	/* now, looking for PHY register set */
604 	if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) {
605 		lynx->phyic.reg_1394a = 1;
606 		PRINT(KERN_INFO, lynx->id,
607 		      "found 1394a conform PHY (using extended register set)");
608 		lynx->phyic.vendor = get_phy_vendorid(lynx);
609 		lynx->phyic.product = get_phy_productid(lynx);
610 	} else {
611 		lynx->phyic.reg_1394a = 0;
612 		PRINT(KERN_INFO, lynx->id, "found old 1394 PHY");
613 	}
614 #endif
615 
616 	/* Setup the general receive FIFO max size. */
617 	reg_write(lynx, FIFO_SIZES, 255);
618 
619 	reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL);
620 
621 	reg_write(lynx, LINK_INT_ENABLE,
622 		  LINK_INT_PHY_TIME_OUT | LINK_INT_PHY_REG_RCVD |
623 		  LINK_INT_PHY_BUSRESET | LINK_INT_IT_STUCK |
624 		  LINK_INT_AT_STUCK | LINK_INT_SNTRJ |
625 		  LINK_INT_TC_ERR | LINK_INT_GRF_OVER_FLOW |
626 		  LINK_INT_ITF_UNDER_FLOW | LINK_INT_ATF_UNDER_FLOW);
627 
628 	/* Disable the L flag in self ID packets. */
629 	set_phy_reg(lynx, 4, 0);
630 
631 	/* Put this baby into snoop mode */
632 	reg_set_bits(lynx, LINK_CONTROL, LINK_CONTROL_SNOOP_ENABLE);
633 
634 	run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
635 
636 	if (request_irq(dev->irq, irq_handler, IRQF_SHARED,
637 			driver_name, lynx)) {
638 		dev_err(&dev->dev,
639 			"Failed to allocate shared interrupt %d\n", dev->irq);
640 		ret = -EIO;
641 		goto fail_deallocate_buffers;
642 	}
643 
644 	lynx->misc.parent = &dev->dev;
645 	lynx->misc.minor = MISC_DYNAMIC_MINOR;
646 	lynx->misc.name = "nosy";
647 	lynx->misc.fops = &nosy_ops;
648 
649 	mutex_lock(&card_mutex);
650 	ret = misc_register(&lynx->misc);
651 	if (ret) {
652 		dev_err(&dev->dev, "Failed to register misc char device\n");
653 		mutex_unlock(&card_mutex);
654 		goto fail_free_irq;
655 	}
656 	list_add_tail(&lynx->link, &card_list);
657 	mutex_unlock(&card_mutex);
658 
659 	dev_info(&dev->dev,
660 		 "Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq);
661 
662 	return 0;
663 
664 fail_free_irq:
665 	reg_write(lynx, PCI_INT_ENABLE, 0);
666 	free_irq(lynx->pci_device->irq, lynx);
667 
668 fail_deallocate_buffers:
669 	if (lynx->rcv_start_pcl)
670 		pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
671 				lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
672 	if (lynx->rcv_pcl)
673 		pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
674 				lynx->rcv_pcl, lynx->rcv_pcl_bus);
675 	if (lynx->rcv_buffer)
676 		pci_free_consistent(lynx->pci_device, PAGE_SIZE,
677 				lynx->rcv_buffer, lynx->rcv_buffer_bus);
678 	iounmap(lynx->registers);
679 
680 fail_deallocate_lynx:
681 	kfree(lynx);
682 
683 fail_disable:
684 	pci_disable_device(dev);
685 
686 	return ret;
687 }
688 
689 static struct pci_device_id pci_table[] = {
690 	{
691 		.vendor =    PCI_VENDOR_ID_TI,
692 		.device =    PCI_DEVICE_ID_TI_PCILYNX,
693 		.subvendor = PCI_ANY_ID,
694 		.subdevice = PCI_ANY_ID,
695 	},
696 	{ }	/* Terminating entry */
697 };
698 
699 MODULE_DEVICE_TABLE(pci, pci_table);
700 
701 static struct pci_driver lynx_pci_driver = {
702 	.name =		driver_name,
703 	.id_table =	pci_table,
704 	.probe =	add_card,
705 	.remove =	remove_card,
706 };
707 
708 module_pci_driver(lynx_pci_driver);
709 
710 MODULE_AUTHOR("Kristian Hoegsberg");
711 MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers");
712 MODULE_LICENSE("GPL");
713