2 * Core IEEE1394 transaction logic
4 * Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include <linux/completion.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/interrupt.h>
26 #include <linux/pci.h>
27 #include <linux/delay.h>
28 #include <linux/poll.h>
29 #include <linux/list.h>
30 #include <linux/kthread.h>
31 #include <asm/uaccess.h>
32 #include <asm/semaphore.h>
34 #include "fw-transaction.h"
35 #include "fw-topology.h"
36 #include "fw-device.h"
38 #define HEADER_PRI(pri) ((pri) << 0)
39 #define HEADER_TCODE(tcode) ((tcode) << 4)
40 #define HEADER_RETRY(retry) ((retry) << 8)
41 #define HEADER_TLABEL(tlabel) ((tlabel) << 10)
42 #define HEADER_DESTINATION(destination) ((destination) << 16)
43 #define HEADER_SOURCE(source) ((source) << 16)
44 #define HEADER_RCODE(rcode) ((rcode) << 12)
45 #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0)
46 #define HEADER_DATA_LENGTH(length) ((length) << 16)
47 #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0)
49 #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f)
50 #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f)
51 #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f)
52 #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff)
53 #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff)
54 #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff)
55 #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff)
56 #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff)
58 #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22))
59 #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23))
60 #define PHY_IDENTIFIER(id) ((id) << 30)
63 close_transaction(struct fw_transaction *transaction,
64 struct fw_card *card, int rcode,
65 u32 *payload, size_t length)
67 struct fw_transaction *t;
70 spin_lock_irqsave(&card->lock, flags);
71 list_for_each_entry(t, &card->transaction_list, link) {
72 if (t == transaction) {
74 card->tlabel_mask &= ~(1 << t->tlabel);
78 spin_unlock_irqrestore(&card->lock, flags);
80 if (&t->link != &card->transaction_list) {
81 t->callback(card, rcode, payload, length, t->callback_data);
89 * Only valid for transactions that are potentially pending (ie have
93 fw_cancel_transaction(struct fw_card *card,
94 struct fw_transaction *transaction)
97 * Cancel the packet transmission if it's still queued. That
98 * will call the packet transmission callback which cancels
102 if (card->driver->cancel_packet(card, &transaction->packet) == 0)
106 * If the request packet has already been sent, we need to see
107 * if the transaction is still pending and remove it in that case.
110 return close_transaction(transaction, card, RCODE_CANCELLED, NULL, 0);
112 EXPORT_SYMBOL(fw_cancel_transaction);
115 transmit_complete_callback(struct fw_packet *packet,
116 struct fw_card *card, int status)
118 struct fw_transaction *t =
119 container_of(packet, struct fw_transaction, packet);
123 close_transaction(t, card, RCODE_COMPLETE, NULL, 0);
126 t->timestamp = packet->timestamp;
131 close_transaction(t, card, RCODE_BUSY, NULL, 0);
134 close_transaction(t, card, RCODE_DATA_ERROR, NULL, 0);
137 close_transaction(t, card, RCODE_TYPE_ERROR, NULL, 0);
141 * In this case the ack is really a juju specific
142 * rcode, so just forward that to the callback.
144 close_transaction(t, card, status, NULL, 0);
150 fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
151 int node_id, int source_id, int generation, int speed,
152 unsigned long long offset, void *payload, size_t length)
157 ext_tcode = tcode & ~0x10;
158 tcode = TCODE_LOCK_REQUEST;
163 HEADER_RETRY(RETRY_X) |
164 HEADER_TLABEL(tlabel) |
165 HEADER_TCODE(tcode) |
166 HEADER_DESTINATION(node_id);
168 HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
173 case TCODE_WRITE_QUADLET_REQUEST:
174 packet->header[3] = *(u32 *)payload;
175 packet->header_length = 16;
176 packet->payload_length = 0;
179 case TCODE_LOCK_REQUEST:
180 case TCODE_WRITE_BLOCK_REQUEST:
182 HEADER_DATA_LENGTH(length) |
183 HEADER_EXTENDED_TCODE(ext_tcode);
184 packet->header_length = 16;
185 packet->payload = payload;
186 packet->payload_length = length;
189 case TCODE_READ_QUADLET_REQUEST:
190 packet->header_length = 12;
191 packet->payload_length = 0;
194 case TCODE_READ_BLOCK_REQUEST:
196 HEADER_DATA_LENGTH(length) |
197 HEADER_EXTENDED_TCODE(ext_tcode);
198 packet->header_length = 16;
199 packet->payload_length = 0;
203 packet->speed = speed;
204 packet->generation = generation;
209 * This function provides low-level access to the IEEE1394 transaction
210 * logic. Most C programs would use either fw_read(), fw_write() or
211 * fw_lock() instead - those function are convenience wrappers for
212 * this function. The fw_send_request() function is primarily
213 * provided as a flexible, one-stop entry point for languages bindings
214 * and protocol bindings.
216 * FIXME: Document this function further, in particular the possible
217 * values for rcode in the callback. In short, we map ACK_COMPLETE to
218 * RCODE_COMPLETE, internal errors set errno and set rcode to
219 * RCODE_SEND_ERROR (which is out of range for standard ieee1394
220 * rcodes). All other rcodes are forwarded unchanged. For all
221 * errors, payload is NULL, length is 0.
223 * Can not expect the callback to be called before the function
224 * returns, though this does happen in some cases (ACK_COMPLETE and
227 * The payload is only used for write requests and must not be freed
228 * until the callback has been called.
230 * @param card the card from which to send the request
231 * @param tcode the tcode for this transaction. Do not use
232 * TCODE_LOCK_REQUEST directly, instead use TCODE_LOCK_MASK_SWAP
233 * etc. to specify tcode and ext_tcode.
234 * @param node_id the destination node ID (bus ID and PHY ID concatenated)
235 * @param generation the generation for which node_id is valid
236 * @param speed the speed to use for sending the request
237 * @param offset the 48 bit offset on the destination node
238 * @param payload the data payload for the request subaction
239 * @param length the length in bytes of the data to read
240 * @param callback function to be called when the transaction is completed
241 * @param callback_data pointer to arbitrary data, which will be
242 * passed to the callback
245 fw_send_request(struct fw_card *card, struct fw_transaction *t,
246 int tcode, int node_id, int generation, int speed,
247 unsigned long long offset,
248 void *payload, size_t length,
249 fw_transaction_callback_t callback, void *callback_data)
255 * Bump the flush timer up 100ms first of all so we
256 * don't race with a flush timer callback.
259 mod_timer(&card->flush_timer, jiffies + DIV_ROUND_UP(HZ, 10));
262 * Allocate tlabel from the bitmap and put the transaction on
263 * the list while holding the card spinlock.
266 spin_lock_irqsave(&card->lock, flags);
268 source = card->node_id;
269 tlabel = card->current_tlabel;
270 if (card->tlabel_mask & (1 << tlabel)) {
271 spin_unlock_irqrestore(&card->lock, flags);
272 callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data);
276 card->current_tlabel = (card->current_tlabel + 1) & 0x1f;
277 card->tlabel_mask |= (1 << tlabel);
279 list_add_tail(&t->link, &card->transaction_list);
281 spin_unlock_irqrestore(&card->lock, flags);
283 /* Initialize rest of transaction, fill out packet and send it. */
284 t->node_id = node_id;
286 t->callback = callback;
287 t->callback_data = callback_data;
289 fw_fill_request(&t->packet, tcode, t->tlabel,
290 node_id, source, generation,
291 speed, offset, payload, length);
292 t->packet.callback = transmit_complete_callback;
294 card->driver->send_request(card, &t->packet);
296 EXPORT_SYMBOL(fw_send_request);
298 struct fw_phy_packet {
299 struct fw_packet packet;
300 struct completion done;
304 transmit_phy_packet_callback(struct fw_packet *packet,
305 struct fw_card *card, int status)
307 struct fw_phy_packet *p =
308 container_of(packet, struct fw_phy_packet, packet);
313 void fw_send_phy_config(struct fw_card *card,
314 int node_id, int generation, int gap_count)
316 struct fw_phy_packet p;
317 u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG) |
318 PHY_CONFIG_ROOT_ID(node_id) |
319 PHY_CONFIG_GAP_COUNT(gap_count);
321 p.packet.header[0] = data;
322 p.packet.header[1] = ~data;
323 p.packet.header_length = 8;
324 p.packet.payload_length = 0;
325 p.packet.speed = SCODE_100;
326 p.packet.generation = generation;
327 p.packet.callback = transmit_phy_packet_callback;
328 init_completion(&p.done);
330 card->driver->send_request(card, &p.packet);
331 wait_for_completion(&p.done);
334 void fw_flush_transactions(struct fw_card *card)
336 struct fw_transaction *t, *next;
337 struct list_head list;
340 INIT_LIST_HEAD(&list);
341 spin_lock_irqsave(&card->lock, flags);
342 list_splice_init(&card->transaction_list, &list);
343 card->tlabel_mask = 0;
344 spin_unlock_irqrestore(&card->lock, flags);
346 list_for_each_entry_safe(t, next, &list, link) {
347 card->driver->cancel_packet(card, &t->packet);
350 * At this point cancel_packet will never call the
351 * transaction callback, since we just took all the
352 * transactions out of the list. So do it here.
354 t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data);
358 static struct fw_address_handler *
359 lookup_overlapping_address_handler(struct list_head *list,
360 unsigned long long offset, size_t length)
362 struct fw_address_handler *handler;
364 list_for_each_entry(handler, list, link) {
365 if (handler->offset < offset + length &&
366 offset < handler->offset + handler->length)
373 static struct fw_address_handler *
374 lookup_enclosing_address_handler(struct list_head *list,
375 unsigned long long offset, size_t length)
377 struct fw_address_handler *handler;
379 list_for_each_entry(handler, list, link) {
380 if (handler->offset <= offset &&
381 offset + length <= handler->offset + handler->length)
388 static DEFINE_SPINLOCK(address_handler_lock);
389 static LIST_HEAD(address_handler_list);
391 const struct fw_address_region fw_high_memory_region =
392 { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, };
393 EXPORT_SYMBOL(fw_high_memory_region);
396 const struct fw_address_region fw_low_memory_region =
397 { .start = 0x000000000000ULL, .end = 0x000100000000ULL, };
398 const struct fw_address_region fw_private_region =
399 { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, };
400 const struct fw_address_region fw_csr_region =
401 { .start = CSR_REGISTER_BASE,
402 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, };
403 const struct fw_address_region fw_unit_space_region =
404 { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, };
408 * Allocate a range of addresses in the node space of the OHCI
409 * controller. When a request is received that falls within the
410 * specified address range, the specified callback is invoked. The
411 * parameters passed to the callback give the details of the
412 * particular request.
414 * Return value: 0 on success, non-zero otherwise.
415 * The start offset of the handler's address region is determined by
416 * fw_core_add_address_handler() and is returned in handler->offset.
417 * The offset is quadlet-aligned.
420 fw_core_add_address_handler(struct fw_address_handler *handler,
421 const struct fw_address_region *region)
423 struct fw_address_handler *other;
427 spin_lock_irqsave(&address_handler_lock, flags);
429 handler->offset = roundup(region->start, 4);
430 while (handler->offset + handler->length <= region->end) {
432 lookup_overlapping_address_handler(&address_handler_list,
437 roundup(other->offset + other->length, 4);
439 list_add_tail(&handler->link, &address_handler_list);
445 spin_unlock_irqrestore(&address_handler_lock, flags);
449 EXPORT_SYMBOL(fw_core_add_address_handler);
452 * Deallocate a range of addresses allocated with fw_allocate. This
453 * will call the associated callback one last time with a the special
454 * tcode TCODE_DEALLOCATE, to let the client destroy the registered
455 * callback data. For convenience, the callback parameters offset and
456 * length are set to the start and the length respectively for the
457 * deallocated region, payload is set to NULL.
459 void fw_core_remove_address_handler(struct fw_address_handler *handler)
463 spin_lock_irqsave(&address_handler_lock, flags);
464 list_del(&handler->link);
465 spin_unlock_irqrestore(&address_handler_lock, flags);
467 EXPORT_SYMBOL(fw_core_remove_address_handler);
470 struct fw_packet response;
471 u32 request_header[4];
478 free_response_callback(struct fw_packet *packet,
479 struct fw_card *card, int status)
481 struct fw_request *request;
483 request = container_of(packet, struct fw_request, response);
488 fw_fill_response(struct fw_packet *response, u32 *request_header,
489 int rcode, void *payload, size_t length)
491 int tcode, tlabel, extended_tcode, source, destination;
493 tcode = HEADER_GET_TCODE(request_header[0]);
494 tlabel = HEADER_GET_TLABEL(request_header[0]);
495 source = HEADER_GET_DESTINATION(request_header[0]);
496 destination = HEADER_GET_SOURCE(request_header[1]);
497 extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
499 response->header[0] =
500 HEADER_RETRY(RETRY_1) |
501 HEADER_TLABEL(tlabel) |
502 HEADER_DESTINATION(destination);
503 response->header[1] =
504 HEADER_SOURCE(source) |
506 response->header[2] = 0;
509 case TCODE_WRITE_QUADLET_REQUEST:
510 case TCODE_WRITE_BLOCK_REQUEST:
511 response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
512 response->header_length = 12;
513 response->payload_length = 0;
516 case TCODE_READ_QUADLET_REQUEST:
517 response->header[0] |=
518 HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
520 response->header[3] = *(u32 *)payload;
522 response->header[3] = 0;
523 response->header_length = 16;
524 response->payload_length = 0;
527 case TCODE_READ_BLOCK_REQUEST:
528 case TCODE_LOCK_REQUEST:
529 response->header[0] |= HEADER_TCODE(tcode + 2);
530 response->header[3] =
531 HEADER_DATA_LENGTH(length) |
532 HEADER_EXTENDED_TCODE(extended_tcode);
533 response->header_length = 16;
534 response->payload = payload;
535 response->payload_length = length;
543 EXPORT_SYMBOL(fw_fill_response);
545 static struct fw_request *
546 allocate_request(struct fw_packet *p)
548 struct fw_request *request;
550 int request_tcode, t;
552 request_tcode = HEADER_GET_TCODE(p->header[0]);
553 switch (request_tcode) {
554 case TCODE_WRITE_QUADLET_REQUEST:
555 data = &p->header[3];
559 case TCODE_WRITE_BLOCK_REQUEST:
560 case TCODE_LOCK_REQUEST:
562 length = HEADER_GET_DATA_LENGTH(p->header[3]);
565 case TCODE_READ_QUADLET_REQUEST:
570 case TCODE_READ_BLOCK_REQUEST:
572 length = HEADER_GET_DATA_LENGTH(p->header[3]);
580 request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
584 t = (p->timestamp & 0x1fff) + 4000;
586 t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000;
588 t = (p->timestamp & ~0x1fff) + t;
590 request->response.speed = p->speed;
591 request->response.timestamp = t;
592 request->response.generation = p->generation;
593 request->response.ack = 0;
594 request->response.callback = free_response_callback;
595 request->ack = p->ack;
596 request->length = length;
598 memcpy(request->data, data, length);
600 memcpy(request->request_header, p->header, sizeof(p->header));
606 fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
609 * Broadcast packets are reported as ACK_COMPLETE, so this
610 * check is sufficient to ensure we don't send response to
611 * broadcast packets or posted writes.
613 if (request->ack != ACK_PENDING) {
618 if (rcode == RCODE_COMPLETE)
619 fw_fill_response(&request->response, request->request_header,
620 rcode, request->data, request->length);
622 fw_fill_response(&request->response, request->request_header,
625 card->driver->send_response(card, &request->response);
627 EXPORT_SYMBOL(fw_send_response);
630 fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
632 struct fw_address_handler *handler;
633 struct fw_request *request;
634 unsigned long long offset;
636 int tcode, destination, source;
638 if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
641 request = allocate_request(p);
642 if (request == NULL) {
643 /* FIXME: send statically allocated busy packet. */
648 ((unsigned long long)
649 HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2];
650 tcode = HEADER_GET_TCODE(p->header[0]);
651 destination = HEADER_GET_DESTINATION(p->header[0]);
652 source = HEADER_GET_SOURCE(p->header[1]);
654 spin_lock_irqsave(&address_handler_lock, flags);
655 handler = lookup_enclosing_address_handler(&address_handler_list,
656 offset, request->length);
657 spin_unlock_irqrestore(&address_handler_lock, flags);
660 * FIXME: lookup the fw_node corresponding to the sender of
661 * this request and pass that to the address handler instead
662 * of the node ID. We may also want to move the address
663 * allocations to fw_node so we only do this callback if the
664 * upper layers registered it for this node.
668 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
670 handler->address_callback(card, request,
671 tcode, destination, source,
672 p->generation, p->speed, offset,
673 request->data, request->length,
674 handler->callback_data);
676 EXPORT_SYMBOL(fw_core_handle_request);
679 fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
681 struct fw_transaction *t;
685 int tcode, tlabel, destination, source, rcode;
687 tcode = HEADER_GET_TCODE(p->header[0]);
688 tlabel = HEADER_GET_TLABEL(p->header[0]);
689 destination = HEADER_GET_DESTINATION(p->header[0]);
690 source = HEADER_GET_SOURCE(p->header[1]);
691 rcode = HEADER_GET_RCODE(p->header[1]);
693 spin_lock_irqsave(&card->lock, flags);
694 list_for_each_entry(t, &card->transaction_list, link) {
695 if (t->node_id == source && t->tlabel == tlabel) {
697 card->tlabel_mask &= ~(1 << t->tlabel);
701 spin_unlock_irqrestore(&card->lock, flags);
703 if (&t->link == &card->transaction_list) {
704 fw_notify("Unsolicited response (source %x, tlabel %x)\n",
710 * FIXME: sanity check packet, is length correct, does tcodes
711 * and addresses match.
715 case TCODE_READ_QUADLET_RESPONSE:
716 data = (u32 *) &p->header[3];
720 case TCODE_WRITE_RESPONSE:
725 case TCODE_READ_BLOCK_RESPONSE:
726 case TCODE_LOCK_RESPONSE:
728 data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
732 /* Should never happen, this is just to shut up gcc. */
739 * The response handler may be executed while the request handler
740 * is still pending. Cancel the request handler.
742 card->driver->cancel_packet(card, &t->packet);
744 t->callback(card, rcode, data, data_length, t->callback_data);
746 EXPORT_SYMBOL(fw_core_handle_response);
748 static const struct fw_address_region topology_map_region =
749 { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP,
750 .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, };
753 handle_topology_map(struct fw_card *card, struct fw_request *request,
754 int tcode, int destination, int source,
755 int generation, int speed,
756 unsigned long long offset,
757 void *payload, size_t length, void *callback_data)
762 if (!TCODE_IS_READ_REQUEST(tcode)) {
763 fw_send_response(card, request, RCODE_TYPE_ERROR);
767 if ((offset & 3) > 0 || (length & 3) > 0) {
768 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
772 start = (offset - topology_map_region.start) / 4;
773 end = start + length / 4;
776 for (i = 0; i < length / 4; i++)
777 map[i] = cpu_to_be32(card->topology_map[start + i]);
779 fw_send_response(card, request, RCODE_COMPLETE);
782 static struct fw_address_handler topology_map = {
784 .address_callback = handle_topology_map,
787 static const struct fw_address_region registers_region =
788 { .start = CSR_REGISTER_BASE,
789 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, };
792 handle_registers(struct fw_card *card, struct fw_request *request,
793 int tcode, int destination, int source,
794 int generation, int speed,
795 unsigned long long offset,
796 void *payload, size_t length, void *callback_data)
798 int reg = offset & ~CSR_REGISTER_BASE;
799 unsigned long long bus_time;
800 __be32 *data = payload;
805 if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
806 fw_send_response(card, request, RCODE_TYPE_ERROR);
810 bus_time = card->driver->get_bus_time(card);
811 if (reg == CSR_CYCLE_TIME)
812 *data = cpu_to_be32(bus_time);
814 *data = cpu_to_be32(bus_time >> 25);
815 fw_send_response(card, request, RCODE_COMPLETE);
818 case CSR_BUS_MANAGER_ID:
819 case CSR_BANDWIDTH_AVAILABLE:
820 case CSR_CHANNELS_AVAILABLE_HI:
821 case CSR_CHANNELS_AVAILABLE_LO:
823 * FIXME: these are handled by the OHCI hardware and
824 * the stack never sees these request. If we add
825 * support for a new type of controller that doesn't
826 * handle this in hardware we need to deal with these
832 case CSR_BUSY_TIMEOUT:
833 /* FIXME: Implement this. */
835 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
840 static struct fw_address_handler registers = {
842 .address_callback = handle_registers,
845 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
846 MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
847 MODULE_LICENSE("GPL");
849 static const u32 vendor_textual_descriptor[] = {
850 /* textual descriptor leaf () */
854 0x4c696e75, /* L i n u */
855 0x78204669, /* x F i */
856 0x72657769, /* r e w i */
857 0x72650000, /* r e */
860 static const u32 model_textual_descriptor[] = {
861 /* model descriptor leaf () */
865 0x4a756a75, /* J u j u */
868 static struct fw_descriptor vendor_id_descriptor = {
869 .length = ARRAY_SIZE(vendor_textual_descriptor),
870 .immediate = 0x03d00d1e,
872 .data = vendor_textual_descriptor,
875 static struct fw_descriptor model_id_descriptor = {
876 .length = ARRAY_SIZE(model_textual_descriptor),
877 .immediate = 0x17000001,
879 .data = model_textual_descriptor,
882 static int __init fw_core_init(void)
886 retval = bus_register(&fw_bus_type);
890 fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
891 if (fw_cdev_major < 0) {
892 bus_unregister(&fw_bus_type);
893 return fw_cdev_major;
896 retval = fw_core_add_address_handler(&topology_map,
897 &topology_map_region);
900 retval = fw_core_add_address_handler(®isters,
904 /* Add the vendor textual descriptor. */
905 retval = fw_core_add_descriptor(&vendor_id_descriptor);
907 retval = fw_core_add_descriptor(&model_id_descriptor);
913 static void __exit fw_core_cleanup(void)
915 unregister_chrdev(fw_cdev_major, "firewire");
916 bus_unregister(&fw_bus_type);
919 module_init(fw_core_init);
920 module_exit(fw_core_cleanup);