aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/firewire/Makefile3
-rw-r--r--drivers/firewire/fw-card.c56
-rw-r--r--drivers/firewire/fw-device-cdev.c617
-rw-r--r--drivers/firewire/fw-device-cdev.h146
-rw-r--r--drivers/firewire/fw-device.c613
-rw-r--r--drivers/firewire/fw-device.h127
-rw-r--r--drivers/firewire/fw-iso.c1
-rw-r--r--drivers/firewire/fw-topology.c10
-rw-r--r--drivers/firewire/fw-transaction.c5
-rw-r--r--drivers/firewire/fw-transaction.h4
10 files changed, 1573 insertions, 9 deletions
diff --git a/drivers/firewire/Makefile b/drivers/firewire/Makefile
index db7020dd02af..da77bc0501e4 100644
--- a/drivers/firewire/Makefile
+++ b/drivers/firewire/Makefile
@@ -2,6 +2,7 @@
2# Makefile for the Linux IEEE 1394 implementation 2# Makefile for the Linux IEEE 1394 implementation
3# 3#
4 4
5fw-core-objs := fw-card.o fw-topology.o fw-transaction.o fw-iso.o 5fw-core-objs := fw-card.o fw-topology.o fw-transaction.o fw-iso.o \
6 fw-device.o fw-device-cdev.o
6 7
7obj-$(CONFIG_FW) += fw-core.o 8obj-$(CONFIG_FW) += fw-core.o
diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index d8abd70ce843..79773907e10d 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -24,6 +24,7 @@
24#include <linux/device.h> 24#include <linux/device.h>
25#include "fw-transaction.h" 25#include "fw-transaction.h"
26#include "fw-topology.h" 26#include "fw-topology.h"
27#include "fw-device.h"
27 28
28/* The lib/crc16.c implementation uses the standard (0x8005) 29/* The lib/crc16.c implementation uses the standard (0x8005)
29 * polynomial, but we need the ITU-T (or CCITT) polynomial (0x1021). 30 * polynomial, but we need the ITU-T (or CCITT) polynomial (0x1021).
@@ -186,6 +187,59 @@ fw_core_remove_descriptor (struct fw_descriptor *desc)
186EXPORT_SYMBOL(fw_core_remove_descriptor); 187EXPORT_SYMBOL(fw_core_remove_descriptor);
187 188
188static void 189static void
190fw_card_irm_work(struct work_struct *work)
191{
192 struct fw_card *card =
193 container_of(work, struct fw_card, work.work);
194 struct fw_device *root;
195 unsigned long flags;
196 int new_irm_id, generation;
197
198 /* FIXME: This simple bus management unconditionally picks a
199 * cycle master if the current root can't do it. We need to
200 * not do this if there is a bus manager already. Also, some
201 * hubs set the contender bit, which is bogus, so we should
202 * probably do a little sanity check on the IRM (like, read
203 * the bandwidth register) if it's not us. */
204
205 spin_lock_irqsave(&card->lock, flags);
206
207 generation = card->generation;
208 root = card->root_node->data;
209
210 if (root == NULL)
211 /* Either link_on is false, or we failed to read the
212 * config rom. In either case, pick another root. */
213 new_irm_id = card->local_node->node_id;
214 else if (root->state != FW_DEVICE_RUNNING)
215 /* If we haven't probed this device yet, bail out now
216 * and let's try again once that's done. */
217 new_irm_id = -1;
218 else if (root->config_rom[2] & bib_cmc)
219 /* FIXME: I suppose we should set the cmstr bit in the
220 * STATE_CLEAR register of this node, as described in
221 * 1394-1995, 8.4.2.6. Also, send out a force root
222 * packet for this node. */
223 new_irm_id = -1;
224 else
225 /* Current root has an active link layer and we
226 * successfully read the config rom, but it's not
227 * cycle master capable. */
228 new_irm_id = card->local_node->node_id;
229
230 if (card->irm_retries++ > 5)
231 new_irm_id = -1;
232
233 spin_unlock_irqrestore(&card->lock, flags);
234
235 if (new_irm_id > 0) {
236 fw_notify("Trying to become root (card %d)\n", card->index);
237 fw_send_force_root(card, new_irm_id, generation);
238 fw_core_initiate_bus_reset(card, 1);
239 }
240}
241
242static void
189release_card(struct device *device) 243release_card(struct device *device)
190{ 244{
191 struct fw_card *card = 245 struct fw_card *card =
@@ -222,6 +276,8 @@ fw_card_initialize(struct fw_card *card, struct fw_card_driver *driver,
222 276
223 card->local_node = NULL; 277 card->local_node = NULL;
224 278
279 INIT_DELAYED_WORK(&card->work, fw_card_irm_work);
280
225 card->card_device.bus = &fw_bus_type; 281 card->card_device.bus = &fw_bus_type;
226 card->card_device.release = release_card; 282 card->card_device.release = release_card;
227 card->card_device.parent = card->device; 283 card->card_device.parent = card->device;
diff --git a/drivers/firewire/fw-device-cdev.c b/drivers/firewire/fw-device-cdev.c
new file mode 100644
index 000000000000..c10e3326abf3
--- /dev/null
+++ b/drivers/firewire/fw-device-cdev.c
@@ -0,0 +1,617 @@
1/* -*- c-basic-offset: 8 -*-
2 *
3 * fw-device-cdev.c - Char device for device raw access
4 *
5 * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software Foundation,
19 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22#include <linux/module.h>
23#include <linux/kernel.h>
24#include <linux/wait.h>
25#include <linux/errno.h>
26#include <linux/device.h>
27#include <linux/vmalloc.h>
28#include <linux/poll.h>
29#include <linux/delay.h>
30#include <linux/mm.h>
31#include <linux/compat.h>
32#include <asm/uaccess.h>
33#include "fw-transaction.h"
34#include "fw-topology.h"
35#include "fw-device.h"
36#include "fw-device-cdev.h"
37
38/*
39 * todo
40 *
41 * - bus resets sends a new packet with new generation and node id
42 *
43 */
44
45/* dequeue_event() just kfree()'s the event, so the event has to be
46 * the first field in the struct. */
47
48struct event {
49 struct { void *data; size_t size; } v[2];
50 struct list_head link;
51};
52
53struct response {
54 struct event event;
55 struct fw_transaction transaction;
56 struct client *client;
57 struct fw_cdev_event_response response;
58};
59
60struct iso_interrupt {
61 struct event event;
62 struct fw_cdev_event_iso_interrupt interrupt;
63};
64
65struct client {
66 struct fw_device *device;
67 spinlock_t lock;
68 struct list_head handler_list;
69 struct list_head request_list;
70 u32 request_serial;
71 struct list_head event_list;
72 struct semaphore event_list_sem;
73 wait_queue_head_t wait;
74 unsigned long vm_start;
75 struct fw_iso_context *iso_context;
76};
77
78static inline void __user *
79u64_to_uptr(__u64 value)
80{
81 return (void __user *)(unsigned long)value;
82}
83
84static inline __u64
85uptr_to_u64(void __user *ptr)
86{
87 return (__u64)(unsigned long)ptr;
88}
89
90static int fw_device_op_open(struct inode *inode, struct file *file)
91{
92 struct fw_device *device;
93 struct client *client;
94
95 device = container_of(inode->i_cdev, struct fw_device, cdev);
96
97 client = kzalloc(sizeof *client, GFP_KERNEL);
98 if (client == NULL)
99 return -ENOMEM;
100
101 client->device = fw_device_get(device);
102 INIT_LIST_HEAD(&client->event_list);
103 sema_init(&client->event_list_sem, 0);
104 INIT_LIST_HEAD(&client->handler_list);
105 INIT_LIST_HEAD(&client->request_list);
106 spin_lock_init(&client->lock);
107 init_waitqueue_head(&client->wait);
108
109 file->private_data = client;
110
111 return 0;
112}
113
114static void queue_event(struct client *client, struct event *event,
115 void *data0, size_t size0, void *data1, size_t size1)
116{
117 unsigned long flags;
118
119 event->v[0].data = data0;
120 event->v[0].size = size0;
121 event->v[1].data = data1;
122 event->v[1].size = size1;
123
124 spin_lock_irqsave(&client->lock, flags);
125
126 list_add_tail(&event->link, &client->event_list);
127
128 up(&client->event_list_sem);
129 wake_up_interruptible(&client->wait);
130
131 spin_unlock_irqrestore(&client->lock, flags);
132}
133
134static int dequeue_event(struct client *client, char __user *buffer, size_t count)
135{
136 unsigned long flags;
137 struct event *event;
138 size_t size, total;
139 int i, retval = -EFAULT;
140
141 if (down_interruptible(&client->event_list_sem) < 0)
142 return -EINTR;
143
144 spin_lock_irqsave(&client->lock, flags);
145
146 event = container_of(client->event_list.next, struct event, link);
147 list_del(&event->link);
148
149 spin_unlock_irqrestore(&client->lock, flags);
150
151 if (buffer == NULL)
152 goto out;
153
154 total = 0;
155 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
156 size = min(event->v[i].size, count - total);
157 if (copy_to_user(buffer + total, event->v[i].data, size))
158 goto out;
159 total += size;
160 }
161 retval = total;
162
163 out:
164 kfree(event);
165
166 return retval;
167}
168
169static ssize_t
170fw_device_op_read(struct file *file,
171 char __user *buffer, size_t count, loff_t *offset)
172{
173 struct client *client = file->private_data;
174
175 return dequeue_event(client, buffer, count);
176}
177
178static int ioctl_config_rom(struct client *client, void __user *arg)
179{
180 struct fw_cdev_get_config_rom rom;
181
182 rom.length = client->device->config_rom_length;
183 memcpy(rom.data, client->device->config_rom, rom.length * 4);
184 if (copy_to_user(arg, &rom,
185 (char *)&rom.data[rom.length] - (char *)&rom))
186 return -EFAULT;
187
188 return 0;
189}
190
191static void
192complete_transaction(struct fw_card *card, int rcode,
193 void *payload, size_t length, void *data)
194{
195 struct response *response = data;
196 struct client *client = response->client;
197
198 if (length < response->response.length)
199 response->response.length = length;
200 if (rcode == RCODE_COMPLETE)
201 memcpy(response->response.data, payload,
202 response->response.length);
203
204 response->response.type = FW_CDEV_EVENT_RESPONSE;
205 response->response.rcode = rcode;
206 queue_event(client, &response->event,
207 &response->response, sizeof response->response,
208 response->response.data, response->response.length);
209}
210
211static ssize_t ioctl_send_request(struct client *client, void __user *arg)
212{
213 struct fw_device *device = client->device;
214 struct fw_cdev_send_request request;
215 struct response *response;
216
217 if (copy_from_user(&request, arg, sizeof request))
218 return -EFAULT;
219
220 /* What is the biggest size we'll accept, really? */
221 if (request.length > 4096)
222 return -EINVAL;
223
224 response = kmalloc(sizeof *response + request.length, GFP_KERNEL);
225 if (response == NULL)
226 return -ENOMEM;
227
228 response->client = client;
229 response->response.length = request.length;
230 response->response.closure = request.closure;
231
232 if (request.data &&
233 copy_from_user(response->response.data,
234 u64_to_uptr(request.data), request.length)) {
235 kfree(response);
236 return -EFAULT;
237 }
238
239 fw_send_request(device->card, &response->transaction,
240 request.tcode,
241 device->node->node_id | LOCAL_BUS,
242 device->card->generation,
243 device->node->max_speed,
244 request.offset,
245 response->response.data, request.length,
246 complete_transaction, response);
247
248 if (request.data)
249 return sizeof request + request.length;
250 else
251 return sizeof request;
252}
253
254struct address_handler {
255 struct fw_address_handler handler;
256 __u64 closure;
257 struct client *client;
258 struct list_head link;
259};
260
261struct request {
262 struct fw_request *request;
263 void *data;
264 size_t length;
265 u32 serial;
266 struct list_head link;
267};
268
269struct request_event {
270 struct event event;
271 struct fw_cdev_event_request request;
272};
273
274static void
275handle_request(struct fw_card *card, struct fw_request *r,
276 int tcode, int destination, int source,
277 int generation, int speed,
278 unsigned long long offset,
279 void *payload, size_t length, void *callback_data)
280{
281 struct address_handler *handler = callback_data;
282 struct request *request;
283 struct request_event *e;
284 unsigned long flags;
285 struct client *client = handler->client;
286
287 request = kmalloc(sizeof *request, GFP_ATOMIC);
288 e = kmalloc(sizeof *e, GFP_ATOMIC);
289 if (request == NULL || e == NULL) {
290 kfree(request);
291 kfree(e);
292 fw_send_response(card, r, RCODE_CONFLICT_ERROR);
293 return;
294 }
295
296 request->request = r;
297 request->data = payload;
298 request->length = length;
299
300 spin_lock_irqsave(&client->lock, flags);
301 request->serial = client->request_serial++;
302 list_add_tail(&request->link, &client->request_list);
303 spin_unlock_irqrestore(&client->lock, flags);
304
305 e->request.type = FW_CDEV_EVENT_REQUEST;
306 e->request.tcode = tcode;
307 e->request.offset = offset;
308 e->request.length = length;
309 e->request.serial = request->serial;
310 e->request.closure = handler->closure;
311
312 queue_event(client, &e->event,
313 &e->request, sizeof e->request, payload, length);
314}
315
316static int ioctl_allocate(struct client *client, void __user *arg)
317{
318 struct fw_cdev_allocate request;
319 struct address_handler *handler;
320 unsigned long flags;
321 struct fw_address_region region;
322
323 if (copy_from_user(&request, arg, sizeof request))
324 return -EFAULT;
325
326 handler = kmalloc(sizeof *handler, GFP_KERNEL);
327 if (handler == NULL)
328 return -ENOMEM;
329
330 region.start = request.offset;
331 region.end = request.offset + request.length;
332 handler->handler.length = request.length;
333 handler->handler.address_callback = handle_request;
334 handler->handler.callback_data = handler;
335 handler->closure = request.closure;
336 handler->client = client;
337
338 if (fw_core_add_address_handler(&handler->handler, &region) < 0) {
339 kfree(handler);
340 return -EBUSY;
341 }
342
343 spin_lock_irqsave(&client->lock, flags);
344 list_add_tail(&handler->link, &client->handler_list);
345 spin_unlock_irqrestore(&client->lock, flags);
346
347 return 0;
348}
349
350static int ioctl_send_response(struct client *client, void __user *arg)
351{
352 struct fw_cdev_send_response request;
353 struct request *r;
354 unsigned long flags;
355
356 if (copy_from_user(&request, arg, sizeof request))
357 return -EFAULT;
358
359 spin_lock_irqsave(&client->lock, flags);
360 list_for_each_entry(r, &client->request_list, link) {
361 if (r->serial == request.serial) {
362 list_del(&r->link);
363 break;
364 }
365 }
366 spin_unlock_irqrestore(&client->lock, flags);
367
368 if (&r->link == &client->request_list)
369 return -EINVAL;
370
371 if (request.length < r->length)
372 r->length = request.length;
373 if (copy_from_user(r->data, u64_to_uptr(request.data), r->length))
374 return -EFAULT;
375
376 fw_send_response(client->device->card, r->request, request.rcode);
377
378 kfree(r);
379
380 return 0;
381}
382
383static void
384iso_callback(struct fw_iso_context *context, int status, u32 cycle, void *data)
385{
386 struct client *client = data;
387 struct iso_interrupt *interrupt;
388
389 interrupt = kzalloc(sizeof *interrupt, GFP_ATOMIC);
390 if (interrupt == NULL)
391 return;
392
393 interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
394 interrupt->interrupt.closure = 0;
395 interrupt->interrupt.cycle = cycle;
396 queue_event(client, &interrupt->event,
397 &interrupt->interrupt, sizeof interrupt->interrupt, NULL, 0);
398}
399
400static int ioctl_create_iso_context(struct client *client, void __user *arg)
401{
402 struct fw_cdev_create_iso_context request;
403
404 if (copy_from_user(&request, arg, sizeof request))
405 return -EFAULT;
406
407 client->iso_context = fw_iso_context_create(client->device->card,
408 FW_ISO_CONTEXT_TRANSMIT,
409 request.buffer_size,
410 iso_callback, client);
411 if (IS_ERR(client->iso_context))
412 return PTR_ERR(client->iso_context);
413
414 return 0;
415}
416
417static int ioctl_queue_iso(struct client *client, void __user *arg)
418{
419 struct fw_cdev_queue_iso request;
420 struct fw_cdev_iso_packet __user *p, *end, *next;
421 void *payload, *payload_end;
422 unsigned long index;
423 int count;
424 struct {
425 struct fw_iso_packet packet;
426 u8 header[256];
427 } u;
428
429 if (client->iso_context == NULL)
430 return -EINVAL;
431 if (copy_from_user(&request, arg, sizeof request))
432 return -EFAULT;
433
434 /* If the user passes a non-NULL data pointer, has mmap()'ed
435 * the iso buffer, and the pointer points inside the buffer,
436 * we setup the payload pointers accordingly. Otherwise we
437 * set them both to NULL, which will still let packets with
438 * payload_length == 0 through. In other words, if no packets
439 * use the indirect payload, the iso buffer need not be mapped
440 * and the request.data pointer is ignored.*/
441
442 index = (unsigned long)request.data - client->vm_start;
443 if (request.data != 0 && client->vm_start != 0 &&
444 index <= client->iso_context->buffer_size) {
445 payload = client->iso_context->buffer + index;
446 payload_end = client->iso_context->buffer +
447 client->iso_context->buffer_size;
448 } else {
449 payload = NULL;
450 payload_end = NULL;
451 }
452
453 if (!access_ok(VERIFY_READ, request.packets, request.size))
454 return -EFAULT;
455
456 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request.packets);
457 end = (void __user *)p + request.size;
458 count = 0;
459 while (p < end) {
460 if (__copy_from_user(&u.packet, p, sizeof *p))
461 return -EFAULT;
462 next = (struct fw_cdev_iso_packet __user *)
463 &p->header[u.packet.header_length / 4];
464 if (next > end)
465 return -EINVAL;
466 if (__copy_from_user
467 (u.packet.header, p->header, u.packet.header_length))
468 return -EFAULT;
469 if (u.packet.skip &&
470 u.packet.header_length + u.packet.payload_length > 0)
471 return -EINVAL;
472 if (payload + u.packet.payload_length > payload_end)
473 return -EINVAL;
474
475 if (fw_iso_context_queue(client->iso_context,
476 &u.packet, payload))
477 break;
478
479 p = next;
480 payload += u.packet.payload_length;
481 count++;
482 }
483
484 request.size -= uptr_to_u64(p) - request.packets;
485 request.packets = uptr_to_u64(p);
486 request.data =
487 client->vm_start + (payload - client->iso_context->buffer);
488
489 if (copy_to_user(arg, &request, sizeof request))
490 return -EFAULT;
491
492 return count;
493}
494
495static int ioctl_send_iso(struct client *client, void __user *arg)
496{
497 struct fw_cdev_send_iso request;
498
499 if (copy_from_user(&request, arg, sizeof request))
500 return -EFAULT;
501
502 return fw_iso_context_send(client->iso_context, request.channel,
503 request.speed, request.cycle);
504}
505
506static int
507dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg)
508{
509 switch (cmd) {
510 case FW_CDEV_IOC_GET_CONFIG_ROM:
511 return ioctl_config_rom(client, arg);
512 case FW_CDEV_IOC_SEND_REQUEST:
513 return ioctl_send_request(client, arg);
514 case FW_CDEV_IOC_ALLOCATE:
515 return ioctl_allocate(client, arg);
516 case FW_CDEV_IOC_SEND_RESPONSE:
517 return ioctl_send_response(client, arg);
518 case FW_CDEV_IOC_CREATE_ISO_CONTEXT:
519 return ioctl_create_iso_context(client, arg);
520 case FW_CDEV_IOC_QUEUE_ISO:
521 return ioctl_queue_iso(client, arg);
522 case FW_CDEV_IOC_SEND_ISO:
523 return ioctl_send_iso(client, arg);
524 default:
525 return -EINVAL;
526 }
527}
528
529static long
530fw_device_op_ioctl(struct file *file,
531 unsigned int cmd, unsigned long arg)
532{
533 struct client *client = file->private_data;
534
535 return dispatch_ioctl(client, cmd, (void __user *) arg);
536}
537
538#ifdef CONFIG_COMPAT
539static long
540fw_device_op_compat_ioctl(struct file *file,
541 unsigned int cmd, unsigned long arg)
542{
543 struct client *client = file->private_data;
544
545 return dispatch_ioctl(client, cmd, compat_ptr(arg));
546}
547#endif
548
549static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
550{
551 struct client *client = file->private_data;
552
553 if (client->iso_context->buffer == NULL)
554 return -EINVAL;
555
556 client->vm_start = vma->vm_start;
557
558 return remap_vmalloc_range(vma, client->iso_context->buffer, 0);
559}
560
561static int fw_device_op_release(struct inode *inode, struct file *file)
562{
563 struct client *client = file->private_data;
564 struct address_handler *h, *next;
565 struct request *r, *next_r;
566
567 if (client->iso_context)
568 fw_iso_context_destroy(client->iso_context);
569
570 list_for_each_entry_safe(h, next, &client->handler_list, link) {
571 fw_core_remove_address_handler(&h->handler);
572 kfree(h);
573 }
574
575 list_for_each_entry_safe(r, next_r, &client->request_list, link) {
576 fw_send_response(client->device->card, r->request,
577 RCODE_CONFLICT_ERROR);
578 kfree(r);
579 }
580
581 /* TODO: wait for all transactions to finish so
582 * complete_transaction doesn't try to queue up responses
583 * after we free client. */
584 while (!list_empty(&client->event_list))
585 dequeue_event(client, NULL, 0);
586
587 fw_device_put(client->device);
588 kfree(client);
589
590 return 0;
591}
592
593static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
594{
595 struct client *client = file->private_data;
596
597 poll_wait(file, &client->wait, pt);
598
599 if (!list_empty(&client->event_list))
600 return POLLIN | POLLRDNORM;
601 else
602 return 0;
603}
604
605struct file_operations fw_device_ops = {
606 .owner = THIS_MODULE,
607 .open = fw_device_op_open,
608 .read = fw_device_op_read,
609 .unlocked_ioctl = fw_device_op_ioctl,
610 .poll = fw_device_op_poll,
611 .release = fw_device_op_release,
612 .mmap = fw_device_op_mmap,
613
614#ifdef CONFIG_COMPAT
615 .compat_ioctl = fw_device_op_compat_ioctl
616#endif
617};
diff --git a/drivers/firewire/fw-device-cdev.h b/drivers/firewire/fw-device-cdev.h
new file mode 100644
index 000000000000..18b20c28a406
--- /dev/null
+++ b/drivers/firewire/fw-device-cdev.h
@@ -0,0 +1,146 @@
1/* -*- c-basic-offset: 8 -*-
2 *
3 * fw-device-cdev.h -- Char device interface.
4 *
5 * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software Foundation,
19 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22#ifndef __fw_cdev_h
23#define __fw_cdev_h
24
25#include <asm/ioctl.h>
26#include <asm/types.h>
27
28#define TCODE_WRITE_QUADLET_REQUEST 0
29#define TCODE_WRITE_BLOCK_REQUEST 1
30#define TCODE_WRITE_RESPONSE 2
31#define TCODE_READ_QUADLET_REQUEST 4
32#define TCODE_READ_BLOCK_REQUEST 5
33#define TCODE_READ_QUADLET_RESPONSE 6
34#define TCODE_READ_BLOCK_RESPONSE 7
35#define TCODE_CYCLE_START 8
36#define TCODE_LOCK_REQUEST 9
37#define TCODE_STREAM_DATA 10
38#define TCODE_LOCK_RESPONSE 11
39
40#define RCODE_COMPLETE 0x0
41#define RCODE_CONFLICT_ERROR 0x4
42#define RCODE_DATA_ERROR 0x5
43#define RCODE_TYPE_ERROR 0x6
44#define RCODE_ADDRESS_ERROR 0x7
45
46#define SCODE_100 0x0
47#define SCODE_200 0x1
48#define SCODE_400 0x2
49#define SCODE_800 0x3
50#define SCODE_1600 0x4
51#define SCODE_3200 0x5
52
53#define FW_CDEV_EVENT_RESPONSE 0x00
54#define FW_CDEV_EVENT_REQUEST 0x01
55#define FW_CDEV_EVENT_ISO_INTERRUPT 0x02
56
57/* The 'closure' fields are for user space to use. Data passed in the
58 * 'closure' field for a request will be returned in the corresponding
59 * event. It's a 64-bit type so that it's a fixed size type big
60 * enough to hold a pointer on all platforms. */
61
62struct fw_cdev_event_response {
63 __u32 type;
64 __u32 rcode;
65 __u64 closure;
66 __u32 length;
67 __u32 data[0];
68};
69
70struct fw_cdev_event_request {
71 __u32 type;
72 __u32 tcode;
73 __u64 offset;
74 __u64 closure;
75 __u32 serial;
76 __u32 length;
77 __u32 data[0];
78};
79
80struct fw_cdev_event_iso_interrupt {
81 __u32 type;
82 __u32 cycle;
83 __u64 closure;
84};
85
86#define FW_CDEV_IOC_GET_CONFIG_ROM _IOR('#', 0x00, struct fw_cdev_get_config_rom)
87#define FW_CDEV_IOC_SEND_REQUEST _IO('#', 0x01)
88#define FW_CDEV_IOC_ALLOCATE _IO('#', 0x02)
89#define FW_CDEV_IOC_SEND_RESPONSE _IO('#', 0x03)
90#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IO('#', 0x04)
91#define FW_CDEV_IOC_QUEUE_ISO _IO('#', 0x05)
92#define FW_CDEV_IOC_SEND_ISO _IO('#', 0x06)
93
94struct fw_cdev_get_config_rom {
95 __u32 length;
96 __u32 data[256];
97};
98
99struct fw_cdev_send_request {
100 __u32 tcode;
101 __u32 length;
102 __u64 offset;
103 __u64 closure;
104 __u64 data;
105};
106
107struct fw_cdev_send_response {
108 __u32 rcode;
109 __u32 length;
110 __u64 data;
111 __u32 serial;
112};
113
114struct fw_cdev_allocate {
115 __u64 offset;
116 __u64 closure;
117 __u32 length;
118};
119
120struct fw_cdev_create_iso_context {
121 __u32 buffer_size;
122};
123
124struct fw_cdev_iso_packet {
125 __u16 payload_length; /* Length of indirect payload. */
126 __u32 interrupt : 1; /* Generate interrupt on this packet */
127 __u32 skip : 1; /* Set to not send packet at all. */
128 __u32 tag : 2;
129 __u32 sy : 4;
130 __u32 header_length : 8; /* Length of immediate header. */
131 __u32 header[0];
132};
133
134struct fw_cdev_queue_iso {
135 __u32 size;
136 __u64 packets;
137 __u64 data;
138};
139
140struct fw_cdev_send_iso {
141 __u32 channel;
142 __u32 speed;
143 __s32 cycle;
144};
145
146#endif
diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
new file mode 100644
index 000000000000..ec1cb7fc8e96
--- /dev/null
+++ b/drivers/firewire/fw-device.c
@@ -0,0 +1,613 @@
1/* -*- c-basic-offset: 8 -*-
2 *
3 * fw-device.c - Device probing and sysfs code.
4 *
5 * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software Foundation,
19 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22#include <linux/module.h>
23#include <linux/wait.h>
24#include <linux/errno.h>
25#include <linux/kthread.h>
26#include <linux/device.h>
27#include <linux/delay.h>
28#include "fw-transaction.h"
29#include "fw-topology.h"
30#include "fw-device.h"
31
32void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 * p)
33{
34 ci->p = p + 1;
35 ci->end = ci->p + (p[0] >> 16);
36}
37
38EXPORT_SYMBOL(fw_csr_iterator_init);
39
40int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value)
41{
42 *key = *ci->p >> 24;
43 *value = *ci->p & 0xffffff;
44
45 return ci->p++ < ci->end;
46}
47
48EXPORT_SYMBOL(fw_csr_iterator_next);
49
50static int is_fw_unit(struct device *dev);
51
52static int match_unit_directory(u32 * directory, struct fw_device_id *id)
53{
54 struct fw_csr_iterator ci;
55 int key, value, match;
56
57 match = 0;
58 fw_csr_iterator_init(&ci, directory);
59 while (fw_csr_iterator_next(&ci, &key, &value)) {
60 if (key == CSR_VENDOR && value == id->vendor)
61 match |= FW_MATCH_VENDOR;
62 if (key == CSR_MODEL && value == id->model)
63 match |= FW_MATCH_MODEL;
64 if (key == CSR_SPECIFIER_ID && value == id->specifier_id)
65 match |= FW_MATCH_SPECIFIER_ID;
66 if (key == CSR_VERSION && value == id->version)
67 match |= FW_MATCH_VERSION;
68 }
69
70 return (match & id->match_flags) == id->match_flags;
71}
72
73static int fw_unit_match(struct device *dev, struct device_driver *drv)
74{
75 struct fw_unit *unit = fw_unit(dev);
76 struct fw_driver *driver = fw_driver(drv);
77 int i;
78
79 /* We only allow binding to fw_units. */
80 if (!is_fw_unit(dev))
81 return 0;
82
83 for (i = 0; driver->id_table[i].match_flags != 0; i++) {
84 if (match_unit_directory(unit->directory, &driver->id_table[i]))
85 return 1;
86 }
87
88 return 0;
89}
90
91static int get_modalias(struct fw_unit *unit, char *buffer, size_t buffer_size)
92{
93 struct fw_device *device = fw_device(unit->device.parent);
94 struct fw_csr_iterator ci;
95
96 int key, value;
97 int vendor = 0;
98 int model = 0;
99 int specifier_id = 0;
100 int version = 0;
101
102 fw_csr_iterator_init(&ci, &device->config_rom[5]);
103 while (fw_csr_iterator_next(&ci, &key, &value)) {
104 switch (key) {
105 case CSR_VENDOR:
106 vendor = value;
107 break;
108 case CSR_MODEL:
109 model = value;
110 break;
111 }
112 }
113
114 fw_csr_iterator_init(&ci, unit->directory);
115 while (fw_csr_iterator_next(&ci, &key, &value)) {
116 switch (key) {
117 case CSR_SPECIFIER_ID:
118 specifier_id = value;
119 break;
120 case CSR_VERSION:
121 version = value;
122 break;
123 }
124 }
125
126 return snprintf(buffer, buffer_size,
127 "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
128 vendor, model, specifier_id, version);
129}
130
131static int
132fw_unit_uevent(struct device *dev, char **envp, int num_envp,
133 char *buffer, int buffer_size)
134{
135 struct fw_unit *unit = fw_unit(dev);
136 char modalias[64];
137 int length = 0;
138 int i = 0;
139
140 if (!is_fw_unit(dev))
141 goto out;
142
143 get_modalias(unit, modalias, sizeof modalias);
144
145 if (add_uevent_var(envp, num_envp, &i,
146 buffer, buffer_size, &length,
147 "MODALIAS=%s", modalias))
148 return -ENOMEM;
149
150 out:
151 envp[i] = NULL;
152
153 return 0;
154}
155
156struct bus_type fw_bus_type = {
157 .name = "fw",
158 .match = fw_unit_match,
159 .uevent = fw_unit_uevent
160};
161
162EXPORT_SYMBOL(fw_bus_type);
163
164extern struct fw_device *fw_device_get(struct fw_device *device)
165{
166 get_device(&device->device);
167
168 return device;
169}
170
171extern void fw_device_put(struct fw_device *device)
172{
173 put_device(&device->device);
174}
175
176static void fw_device_release(struct device *dev)
177{
178 struct fw_device *device = fw_device(dev);
179 unsigned long flags;
180
181 /* Take the card lock so we don't set this to NULL while a
182 * FW_NODE_UPDATED callback is being handled. */
183 spin_lock_irqsave(&device->card->lock, flags);
184 device->node->data = NULL;
185 spin_unlock_irqrestore(&device->card->lock, flags);
186
187 fw_node_put(device->node);
188 fw_card_put(device->card);
189 kfree(device->config_rom);
190 kfree(device);
191}
192
193int fw_device_enable_phys_dma(struct fw_device *device)
194{
195 return device->card->driver->enable_phys_dma(device->card,
196 device->node_id,
197 device->generation);
198}
199
200EXPORT_SYMBOL(fw_device_enable_phys_dma);
201
202static ssize_t
203show_modalias_attribute(struct device *dev,
204 struct device_attribute *attr, char *buf)
205{
206 struct fw_unit *unit = fw_unit(dev);
207 int length;
208
209 length = get_modalias(unit, buf, PAGE_SIZE);
210 strcpy(buf + length, "\n");
211
212 return length + 1;
213}
214
215static struct device_attribute modalias_attribute = {
216 .attr = {.name = "modalias",.mode = S_IRUGO},
217 .show = show_modalias_attribute
218};
219
220static ssize_t
221show_config_rom_attribute(struct device *dev,
222 struct device_attribute *attr, char *buf)
223{
224 struct fw_device *device = fw_device(dev);
225
226 memcpy(buf, device->config_rom, device->config_rom_length * 4);
227
228 return device->config_rom_length * 4;
229}
230
231static struct device_attribute config_rom_attribute = {
232 .attr = {.name = "config_rom",.mode = S_IRUGO},
233 .show = show_config_rom_attribute,
234};
235
236struct read_quadlet_callback_data {
237 struct completion done;
238 int rcode;
239 u32 data;
240};
241
242static void
243complete_transaction(struct fw_card *card, int rcode,
244 void *payload, size_t length, void *data)
245{
246 struct read_quadlet_callback_data *callback_data = data;
247
248 if (rcode == RCODE_COMPLETE)
249 callback_data->data = be32_to_cpu(*(__be32 *)payload);
250 callback_data->rcode = rcode;
251 complete(&callback_data->done);
252}
253
254static int read_rom(struct fw_device *device, int index, u32 * data)
255{
256 struct read_quadlet_callback_data callback_data;
257 struct fw_transaction t;
258 u64 offset;
259
260 init_completion(&callback_data.done);
261
262 offset = 0xfffff0000400ULL + index * 4;
263 fw_send_request(device->card, &t, TCODE_READ_QUADLET_REQUEST,
264 device->node_id | LOCAL_BUS,
265 device->generation, SCODE_100,
266 offset, NULL, 4, complete_transaction, &callback_data);
267
268 wait_for_completion(&callback_data.done);
269
270 *data = callback_data.data;
271
272 return callback_data.rcode;
273}
274
275static int read_bus_info_block(struct fw_device *device)
276{
277 static u32 rom[256];
278 u32 stack[16], sp, key;
279 int i, end, length;
280
281 /* First read the bus info block. */
282 for (i = 0; i < 5; i++) {
283 if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
284 return -1;
285 /* As per IEEE1212 7.2, during power-up, devices can
286 * reply with a 0 for the first quadlet of the config
287 * rom to indicate that they are booting (for example,
288 * if the firmware is on the disk of a external
289 * harddisk). In that case we just fail, and the
290 * retry mechanism will try again later. */
291 if (i == 0 && rom[i] == 0)
292 return -1;
293 }
294
295 /* Now parse the config rom. The config rom is a recursive
296 * directory structure so we parse it using a stack of
297 * references to the blocks that make up the structure. We
298 * push a reference to the root directory on the stack to
299 * start things off. */
300 length = i;
301 sp = 0;
302 stack[sp++] = 0xc0000005;
303 while (sp > 0) {
304 /* Pop the next block reference of the stack. The
305 * lower 24 bits is the offset into the config rom,
306 * the upper 8 bits are the type of the reference the
307 * block. */
308 key = stack[--sp];
309 i = key & 0xffffff;
310 if (i >= ARRAY_SIZE(rom))
311 /* The reference points outside the standard
312 * config rom area, something's fishy. */
313 return -1;
314
315 /* Read header quadlet for the block to get the length. */
316 if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
317 return -1;
318 end = i + (rom[i] >> 16) + 1;
319 i++;
320 if (end > ARRAY_SIZE(rom))
321 /* This block extends outside standard config
322 * area (and the array we're reading it
323 * into). That's broken, so ignore this
324 * device. */
325 return -1;
326
327 /* Now read in the block. If this is a directory
328 * block, check the entries as we read them to see if
329 * it references another block, and push it in that case. */
330 while (i < end) {
331 if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
332 return -1;
333 if ((key >> 30) == 3 && (rom[i] >> 30) > 1 &&
334 sp < ARRAY_SIZE(stack))
335 stack[sp++] = i + rom[i];
336 i++;
337 }
338 if (length < i)
339 length = i;
340 }
341
342 device->config_rom = kmalloc(length * 4, GFP_KERNEL);
343 if (device->config_rom == NULL)
344 return -1;
345 memcpy(device->config_rom, rom, length * 4);
346 device->config_rom_length = length;
347
348 return 0;
349}
350
351static void fw_unit_release(struct device *dev)
352{
353 struct fw_unit *unit = fw_unit(dev);
354
355 kfree(unit);
356}
357
358static int is_fw_unit(struct device *dev)
359{
360 return dev->release == fw_unit_release;
361}
362
363static void create_units(struct fw_device *device)
364{
365 struct fw_csr_iterator ci;
366 struct fw_unit *unit;
367 int key, value, i;
368
369 i = 0;
370 fw_csr_iterator_init(&ci, &device->config_rom[5]);
371 while (fw_csr_iterator_next(&ci, &key, &value)) {
372 if (key != (CSR_UNIT | CSR_DIRECTORY))
373 continue;
374
375 /* Get the address of the unit directory and try to
376 * match the drivers id_tables against it. */
377 unit = kzalloc(sizeof *unit, GFP_KERNEL);
378 if (unit == NULL) {
379 fw_error("failed to allocate memory for unit\n");
380 continue;
381 }
382
383 unit->directory = ci.p + value - 1;
384 unit->device.bus = &fw_bus_type;
385 unit->device.release = fw_unit_release;
386 unit->device.parent = &device->device;
387 snprintf(unit->device.bus_id, sizeof unit->device.bus_id,
388 "%s.%d", device->device.bus_id, i++);
389
390 if (device_register(&unit->device) < 0) {
391 kfree(unit);
392 continue;
393 }
394
395 if (device_create_file(&unit->device, &modalias_attribute) < 0) {
396 device_unregister(&unit->device);
397 kfree(unit);
398 }
399 }
400}
401
402static int shutdown_unit(struct device *device, void *data)
403{
404 struct fw_unit *unit = fw_unit(device);
405
406 if (is_fw_unit(device)) {
407 device_remove_file(&unit->device, &modalias_attribute);
408 device_unregister(&unit->device);
409 }
410
411 return 0;
412}
413
414static void fw_device_shutdown(struct work_struct *work)
415{
416 struct fw_device *device =
417 container_of(work, struct fw_device, work.work);
418
419 device_remove_file(&device->device, &config_rom_attribute);
420 cdev_del(&device->cdev);
421 unregister_chrdev_region(device->device.devt, 1);
422 device_for_each_child(&device->device, NULL, shutdown_unit);
423 device_unregister(&device->device);
424}
425
426/* These defines control the retry behavior for reading the config
427 * rom. It shouldn't be necessary to tweak these; if the device
428 * doesn't respond to a config rom read within 10 seconds, it's not
429 * going to respond at all. As for the initial delay, a lot of
430 * devices will be able to respond within half a second after bus
431 * reset. On the other hand, it's not really worth being more
432 * aggressive than that, since it scales pretty well; if 10 devices
433 * are plugged in, they're all getting read within one second. */
434
435#define MAX_RETRIES 5
436#define RETRY_DELAY (2 * HZ)
437#define INITIAL_DELAY (HZ / 2)
438
439static void fw_device_init(struct work_struct *work)
440{
441 static int serial;
442 struct fw_device *device =
443 container_of(work, struct fw_device, work.work);
444
445 /* All failure paths here set node->data to NULL, so that we
446 * don't try to do device_for_each_child() on a kfree()'d
447 * device. */
448
449 if (read_bus_info_block(device) < 0) {
450 if (device->config_rom_retries < MAX_RETRIES) {
451 device->config_rom_retries++;
452 schedule_delayed_work(&device->work, RETRY_DELAY);
453 } else {
454 fw_notify("giving up on config rom for node id %d\n",
455 device->node_id);
456 fw_device_release(&device->device);
457 }
458 return;
459 }
460
461 device->device.bus = &fw_bus_type;
462 device->device.release = fw_device_release;
463 device->device.parent = device->card->device;
464 snprintf(device->device.bus_id, sizeof device->device.bus_id,
465 "fw%d", serial++);
466
467 if (alloc_chrdev_region(&device->device.devt, 0, 1, "fw")) {
468 fw_error("Failed to register char device region.\n");
469 goto error;
470 }
471
472 cdev_init(&device->cdev, &fw_device_ops);
473 device->cdev.owner = THIS_MODULE;
474 kobject_set_name(&device->cdev.kobj, device->device.bus_id);
475 if (cdev_add(&device->cdev, device->device.devt, 1)) {
476 fw_error("Failed to register char device.\n");
477 goto error;
478 }
479
480 if (device_add(&device->device)) {
481 fw_error("Failed to add device.\n");
482 goto error;
483 }
484
485 if (device_create_file(&device->device, &config_rom_attribute) < 0) {
486 fw_error("Failed to create config rom file.\n");
487 goto error_with_device;
488 }
489
490 create_units(device);
491
492 /* Transition the device to running state. If it got pulled
493 * out from under us while we did the intialization work, we
494 * have to shut down the device again here. Normally, though,
495 * fw_node_event will be responsible for shutting it down when
496 * necessary. We have to use the atomic cmpxchg here to avoid
497 * racing with the FW_NODE_DESTROYED case in
498 * fw_node_event(). */
499 if (cmpxchg(&device->state,
500 FW_DEVICE_INITIALIZING,
501 FW_DEVICE_RUNNING) == FW_DEVICE_SHUTDOWN)
502 fw_device_shutdown(&device->work.work);
503 else
504 fw_notify("created new fw device %s (%d config rom retries)\n",
505 device->device.bus_id, device->config_rom_retries);
506
507 /* Reschedule the IRM work if we just finished reading the
508 * root node config rom. If this races with a bus reset we
509 * just end up running the IRM work a couple of extra times -
510 * pretty harmless. */
511 if (device->node == device->card->root_node)
512 schedule_delayed_work(&device->card->work, 0);
513
514 return;
515
516 error_with_device:
517 device_del(&device->device);
518 error:
519 cdev_del(&device->cdev);
520 unregister_chrdev_region(device->device.devt, 1);
521 put_device(&device->device);
522}
523
524static int update_unit(struct device *dev, void *data)
525{
526 struct fw_unit *unit = fw_unit(dev);
527 struct fw_driver *driver = (struct fw_driver *)dev->driver;
528
529 if (is_fw_unit(dev) && driver != NULL && driver->update != NULL)
530 driver->update(unit);
531
532 return 0;
533}
534
535void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
536{
537 struct fw_device *device;
538
539 /* Ignore events for the local node (i.e. the node that
540 * corresponds to the ieee1394 controller in this linux box). */
541 if (node == card->local_node)
542 return;
543
544 switch (event) {
545 case FW_NODE_CREATED:
546 case FW_NODE_LINK_ON:
547 if (!node->link_on)
548 break;
549
550 device = kzalloc(sizeof(*device), GFP_ATOMIC);
551 if (device == NULL)
552 break;
553
554 /* Do minimal intialization of the device here, the
555 * rest will happen in fw_device_init(). We need the
556 * card and node so we can read the config rom and we
557 * need to do device_initialize() now so
558 * device_for_each_child() in FW_NODE_UPDATED is
559 * doesn't freak out. */
560 device_initialize(&device->device);
561 device->state = FW_DEVICE_INITIALIZING;
562 device->card = fw_card_get(card);
563 device->node = fw_node_get(node);
564 device->node_id = node->node_id;
565 device->generation = card->generation;
566
567 /* Set the node data to point back to this device so
568 * FW_NODE_UPDATED callbacks can update the node_id
569 * and generation for the device. */
570 node->data = device;
571
572 /* Many devices are slow to respond after bus resets,
573 * especially if they are bus powered and go through
574 * power-up after getting plugged in. We schedule the
575 * first config rom scan half a second after bus reset. */
576 INIT_DELAYED_WORK(&device->work, fw_device_init);
577 schedule_delayed_work(&device->work, INITIAL_DELAY);
578 break;
579
580 case FW_NODE_UPDATED:
581 if (!node->link_on || node->data == NULL)
582 break;
583
584 device = node->data;
585 device->node_id = node->node_id;
586 device->generation = card->generation;
587 device_for_each_child(&device->device, NULL, update_unit);
588 break;
589
590 case FW_NODE_DESTROYED:
591 case FW_NODE_LINK_OFF:
592 if (!node->data)
593 break;
594
595 /* Destroy the device associated with the node. There
596 * are two cases here: either the device is fully
597 * initialized (FW_DEVICE_RUNNING) or we're in the
598 * process of reading its config rom
599 * (FW_DEVICE_INITIALIZING). If it is fully
600 * initialized we can reuse device->work to schedule a
601 * full fw_device_shutdown(). If not, there's work
602 * scheduled to read it's config rom, and we just put
603 * the device in shutdown state to have that code fail
604 * to create the device. */
605 device = node->data;
606 if (xchg(&device->state,
607 FW_DEVICE_SHUTDOWN) == FW_DEVICE_RUNNING) {
608 INIT_DELAYED_WORK(&device->work, fw_device_shutdown);
609 schedule_delayed_work(&device->work, 0);
610 }
611 break;
612 }
613}
diff --git a/drivers/firewire/fw-device.h b/drivers/firewire/fw-device.h
new file mode 100644
index 000000000000..84cd5e7e2fce
--- /dev/null
+++ b/drivers/firewire/fw-device.h
@@ -0,0 +1,127 @@
1/* -*- c-basic-offset: 8 -*-
2 *
3 * fw-device.h - Device probing and sysfs code.
4 *
5 * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software Foundation,
19 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22#ifndef __fw_device_h
23#define __fw_device_h
24
25#include <linux/fs.h>
26#include <linux/cdev.h>
27
28enum fw_device_state {
29 FW_DEVICE_INITIALIZING,
30 FW_DEVICE_RUNNING,
31 FW_DEVICE_SHUTDOWN
32};
33
34struct fw_device {
35 int state;
36 struct fw_node *node;
37 int node_id;
38 int generation;
39 struct fw_card *card;
40 struct device device;
41 struct cdev cdev;
42 __be32 *config_rom;
43 size_t config_rom_length;
44 int config_rom_retries;
45 struct delayed_work work;
46};
47
48static inline struct fw_device *
49fw_device(struct device *dev)
50{
51 return container_of(dev, struct fw_device, device);
52}
53
54struct fw_device *fw_device_get(struct fw_device *device);
55void fw_device_put(struct fw_device *device);
56int fw_device_enable_phys_dma(struct fw_device *device);
57
58struct fw_unit {
59 struct device device;
60 u32 *directory;
61};
62
63static inline struct fw_unit *
64fw_unit(struct device *dev)
65{
66 return container_of(dev, struct fw_unit, device);
67}
68
69#define CSR_OFFSET 0x40
70#define CSR_LEAF 0x80
71#define CSR_DIRECTORY 0xc0
72
73#define CSR_DESCRIPTOR 0x01
74#define CSR_VENDOR 0x03
75#define CSR_HARDWARE_VERSION 0x04
76#define CSR_NODE_CAPABILITIES 0x0c
77#define CSR_UNIT 0x11
78#define CSR_SPECIFIER_ID 0x12
79#define CSR_VERSION 0x13
80#define CSR_DEPENDENT_INFO 0x14
81#define CSR_MODEL 0x17
82#define CSR_INSTANCE 0x18
83
84#define SBP2_COMMAND_SET_SPECIFIER 0x38
85#define SBP2_COMMAND_SET 0x39
86#define SBP2_COMMAND_SET_REVISION 0x3b
87#define SBP2_FIRMWARE_REVISION 0x3c
88
89struct fw_csr_iterator {
90 u32 *p;
91 u32 *end;
92};
93
94void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
95int fw_csr_iterator_next(struct fw_csr_iterator *ci,
96 int *key, int *value);
97
98#define FW_MATCH_VENDOR 0x0001
99#define FW_MATCH_MODEL 0x0002
100#define FW_MATCH_SPECIFIER_ID 0x0004
101#define FW_MATCH_VERSION 0x0008
102
103struct fw_device_id {
104 u32 match_flags;
105 u32 vendor;
106 u32 model;
107 u32 specifier_id;
108 u32 version;
109 void *driver_data;
110};
111
112struct fw_driver {
113 struct device_driver driver;
114 /* Called when the parent device sits through a bus reset. */
115 void (*update) (struct fw_unit *unit);
116 struct fw_device_id *id_table;
117};
118
119static inline struct fw_driver *
120fw_driver(struct device_driver *drv)
121{
122 return container_of(drv, struct fw_driver, driver);
123}
124
125extern struct file_operations fw_device_ops;
126
127#endif
diff --git a/drivers/firewire/fw-iso.c b/drivers/firewire/fw-iso.c
index 61548c4d18ec..6b638568c2c9 100644
--- a/drivers/firewire/fw-iso.c
+++ b/drivers/firewire/fw-iso.c
@@ -26,6 +26,7 @@
26 26
27#include "fw-transaction.h" 27#include "fw-transaction.h"
28#include "fw-topology.h" 28#include "fw-topology.h"
29#include "fw-device.h"
29 30
30static int 31static int
31setup_iso_buffer(struct fw_iso_context *ctx, size_t size, 32setup_iso_buffer(struct fw_iso_context *ctx, size_t size,
diff --git a/drivers/firewire/fw-topology.c b/drivers/firewire/fw-topology.c
index 2778aa3da8e4..e475025aae91 100644
--- a/drivers/firewire/fw-topology.c
+++ b/drivers/firewire/fw-topology.c
@@ -434,13 +434,15 @@ fw_core_handle_bus_reset(struct fw_card *card,
434 for_each_fw_node(card, local_node, report_found_node); 434 for_each_fw_node(card, local_node, report_found_node);
435 } else { 435 } else {
436 update_tree(card, local_node, &changed); 436 update_tree(card, local_node, &changed);
437 if (changed)
438 card->irm_retries = 0;
437 } 439 }
438 440
441 /* If we're not the root node, we may have to do some IRM work. */
442 if (card->local_node != card->root_node)
443 schedule_delayed_work(&card->work, 0);
444
439 spin_unlock_irqrestore(&card->lock, flags); 445 spin_unlock_irqrestore(&card->lock, flags);
440} 446}
441 447
442EXPORT_SYMBOL(fw_core_handle_bus_reset); 448EXPORT_SYMBOL(fw_core_handle_bus_reset);
443
444void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
445{
446}
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index c3acf7431279..affd42014a67 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -33,6 +33,7 @@
33 33
34#include "fw-transaction.h" 34#include "fw-transaction.h"
35#include "fw-topology.h" 35#include "fw-topology.h"
36#include "fw-device.h"
36 37
37#define header_pri(pri) ((pri) << 0) 38#define header_pri(pri) ((pri) << 0)
38#define header_tcode(tcode) ((tcode) << 4) 39#define header_tcode(tcode) ((tcode) << 4)
@@ -702,10 +703,6 @@ static struct fw_descriptor vendor_textual_descriptor = {
702 .data = vendor_textual_descriptor_data 703 .data = vendor_textual_descriptor_data
703}; 704};
704 705
705struct bus_type fw_bus_type = {
706 .name = "fw",
707};
708
709static int __init fw_core_init(void) 706static int __init fw_core_init(void)
710{ 707{
711 int retval; 708 int retval;
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index 149ef1652acf..7f618f2373a5 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -265,6 +265,10 @@ struct fw_card {
265 struct device card_device; 265 struct device card_device;
266 266
267 struct list_head link; 267 struct list_head link;
268
269 /* Work struct for IRM duties. */
270 struct delayed_work work;
271 int irm_retries;
268}; 272};
269 273
270struct fw_card *fw_card_get(struct fw_card *card); 274struct fw_card *fw_card_get(struct fw_card *card);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 01:57:05 -0500