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/kernel.h>
22 #include <linux/module.h>
23 #include <linux/init.h>
24 #include <linux/interrupt.h>
25 #include <linux/pci.h>
26 #include <linux/delay.h>
27 #include <linux/poll.h>
28 #include <linux/list.h>
29 #include <linux/kthread.h>
30 #include <asm/uaccess.h>
31 #include <asm/semaphore.h>
33 #include "fw-transaction.h"
34 #include "fw-topology.h"
35 #include "fw-device.h"
37 #define HEADER_PRI(pri) ((pri) << 0)
38 #define HEADER_TCODE(tcode) ((tcode) << 4)
39 #define HEADER_RETRY(retry) ((retry) << 8)
40 #define HEADER_TLABEL(tlabel) ((tlabel) << 10)
41 #define HEADER_DESTINATION(destination) ((destination) << 16)
42 #define HEADER_SOURCE(source) ((source) << 16)
43 #define HEADER_RCODE(rcode) ((rcode) << 12)
44 #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0)
45 #define HEADER_DATA_LENGTH(length) ((length) << 16)
46 #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0)
48 #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f)
49 #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f)
50 #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f)
51 #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff)
52 #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff)
53 #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff)
54 #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff)
55 #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff)
57 #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22))
58 #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23))
59 #define PHY_IDENTIFIER(id) ((id) << 30)
62 close_transaction(struct fw_transaction *transaction,
63 struct fw_card *card, int rcode,
64 u32 *payload, size_t length)
66 struct fw_transaction *t;
69 spin_lock_irqsave(&card->lock, flags);
70 list_for_each_entry(t, &card->transaction_list, link) {
71 if (t == transaction) {
73 card->tlabel_mask &= ~(1 << t->tlabel);
77 spin_unlock_irqrestore(&card->lock, flags);
79 if (&t->link != &card->transaction_list) {
80 t->callback(card, rcode, payload, length, t->callback_data);
88 * Only valid for transactions that are potentially pending (ie have
92 fw_cancel_transaction(struct fw_card *card,
93 struct fw_transaction *transaction)
96 * Cancel the packet transmission if it's still queued. That
97 * will call the packet transmission callback which cancels
101 if (card->driver->cancel_packet(card, &transaction->packet) == 0)
105 * If the request packet has already been sent, we need to see
106 * if the transaction is still pending and remove it in that case.
109 return close_transaction(transaction, card, RCODE_CANCELLED, NULL, 0);
111 EXPORT_SYMBOL(fw_cancel_transaction);
114 transmit_complete_callback(struct fw_packet *packet,
115 struct fw_card *card, int status)
117 struct fw_transaction *t =
118 container_of(packet, struct fw_transaction, packet);
122 close_transaction(t, card, RCODE_COMPLETE, NULL, 0);
125 t->timestamp = packet->timestamp;
130 close_transaction(t, card, RCODE_BUSY, NULL, 0);
133 close_transaction(t, card, RCODE_DATA_ERROR, NULL, 0);
136 close_transaction(t, card, RCODE_TYPE_ERROR, NULL, 0);
140 * In this case the ack is really a juju specific
141 * rcode, so just forward that to the callback.
143 close_transaction(t, card, status, NULL, 0);
149 fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
150 int node_id, int source_id, int generation, int speed,
151 unsigned long long offset, void *payload, size_t length)
156 ext_tcode = tcode & ~0x10;
157 tcode = TCODE_LOCK_REQUEST;
162 HEADER_RETRY(RETRY_X) |
163 HEADER_TLABEL(tlabel) |
164 HEADER_TCODE(tcode) |
165 HEADER_DESTINATION(node_id);
167 HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
172 case TCODE_WRITE_QUADLET_REQUEST:
173 packet->header[3] = *(u32 *)payload;
174 packet->header_length = 16;
175 packet->payload_length = 0;
178 case TCODE_LOCK_REQUEST:
179 case TCODE_WRITE_BLOCK_REQUEST:
181 HEADER_DATA_LENGTH(length) |
182 HEADER_EXTENDED_TCODE(ext_tcode);
183 packet->header_length = 16;
184 packet->payload = payload;
185 packet->payload_length = length;
188 case TCODE_READ_QUADLET_REQUEST:
189 packet->header_length = 12;
190 packet->payload_length = 0;
193 case TCODE_READ_BLOCK_REQUEST:
195 HEADER_DATA_LENGTH(length) |
196 HEADER_EXTENDED_TCODE(ext_tcode);
197 packet->header_length = 16;
198 packet->payload_length = 0;
202 packet->speed = speed;
203 packet->generation = generation;
208 * This function provides low-level access to the IEEE1394 transaction
209 * logic. Most C programs would use either fw_read(), fw_write() or
210 * fw_lock() instead - those function are convenience wrappers for
211 * this function. The fw_send_request() function is primarily
212 * provided as a flexible, one-stop entry point for languages bindings
213 * and protocol bindings.
215 * FIXME: Document this function further, in particular the possible
216 * values for rcode in the callback. In short, we map ACK_COMPLETE to
217 * RCODE_COMPLETE, internal errors set errno and set rcode to
218 * RCODE_SEND_ERROR (which is out of range for standard ieee1394
219 * rcodes). All other rcodes are forwarded unchanged. For all
220 * errors, payload is NULL, length is 0.
222 * Can not expect the callback to be called before the function
223 * returns, though this does happen in some cases (ACK_COMPLETE and
226 * The payload is only used for write requests and must not be freed
227 * until the callback has been called.
229 * @param card the card from which to send the request
230 * @param tcode the tcode for this transaction. Do not use
231 * TCODE_LOCK_REQUEST directly, instead use TCODE_LOCK_MASK_SWAP
232 * etc. to specify tcode and ext_tcode.
233 * @param node_id the destination node ID (bus ID and PHY ID concatenated)
234 * @param generation the generation for which node_id is valid
235 * @param speed the speed to use for sending the request
236 * @param offset the 48 bit offset on the destination node
237 * @param payload the data payload for the request subaction
238 * @param length the length in bytes of the data to read
239 * @param callback function to be called when the transaction is completed
240 * @param callback_data pointer to arbitrary data, which will be
241 * passed to the callback
244 fw_send_request(struct fw_card *card, struct fw_transaction *t,
245 int tcode, int node_id, int generation, int speed,
246 unsigned long long offset,
247 void *payload, size_t length,
248 fw_transaction_callback_t callback, void *callback_data)
254 * Bump the flush timer up 100ms first of all so we
255 * don't race with a flush timer callback.
258 mod_timer(&card->flush_timer, jiffies + DIV_ROUND_UP(HZ, 10));
261 * Allocate tlabel from the bitmap and put the transaction on
262 * the list while holding the card spinlock.
265 spin_lock_irqsave(&card->lock, flags);
267 source = card->node_id;
268 tlabel = card->current_tlabel;
269 if (card->tlabel_mask & (1 << tlabel)) {
270 spin_unlock_irqrestore(&card->lock, flags);
271 callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data);
275 card->current_tlabel = (card->current_tlabel + 1) & 0x1f;
276 card->tlabel_mask |= (1 << tlabel);
278 list_add_tail(&t->link, &card->transaction_list);
280 spin_unlock_irqrestore(&card->lock, flags);
282 /* Initialize rest of transaction, fill out packet and send it. */
283 t->node_id = node_id;
285 t->callback = callback;
286 t->callback_data = callback_data;
288 fw_fill_request(&t->packet, tcode, t->tlabel,
289 node_id, source, generation,
290 speed, offset, payload, length);
291 t->packet.callback = transmit_complete_callback;
293 card->driver->send_request(card, &t->packet);
295 EXPORT_SYMBOL(fw_send_request);
298 transmit_phy_packet_callback(struct fw_packet *packet,
299 struct fw_card *card, int status)
304 static void send_phy_packet(struct fw_card *card, u32 data, int generation)
306 struct fw_packet *packet;
308 packet = kzalloc(sizeof(*packet), GFP_ATOMIC);
312 packet->header[0] = data;
313 packet->header[1] = ~data;
314 packet->header_length = 8;
315 packet->payload_length = 0;
316 packet->speed = SCODE_100;
317 packet->generation = generation;
318 packet->callback = transmit_phy_packet_callback;
320 card->driver->send_request(card, packet);
323 void fw_send_phy_config(struct fw_card *card,
324 int node_id, int generation, int gap_count)
328 q = PHY_IDENTIFIER(PHY_PACKET_CONFIG) |
329 PHY_CONFIG_ROOT_ID(node_id) |
330 PHY_CONFIG_GAP_COUNT(gap_count);
332 send_phy_packet(card, q, generation);
335 void fw_flush_transactions(struct fw_card *card)
337 struct fw_transaction *t, *next;
338 struct list_head list;
341 INIT_LIST_HEAD(&list);
342 spin_lock_irqsave(&card->lock, flags);
343 list_splice_init(&card->transaction_list, &list);
344 card->tlabel_mask = 0;
345 spin_unlock_irqrestore(&card->lock, flags);
347 list_for_each_entry_safe(t, next, &list, link) {
348 card->driver->cancel_packet(card, &t->packet);
351 * At this point cancel_packet will never call the
352 * transaction callback, since we just took all the
353 * transactions out of the list. So do it here.
355 t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data);
359 static struct fw_address_handler *
360 lookup_overlapping_address_handler(struct list_head *list,
361 unsigned long long offset, size_t length)
363 struct fw_address_handler *handler;
365 list_for_each_entry(handler, list, link) {
366 if (handler->offset < offset + length &&
367 offset < handler->offset + handler->length)
374 static struct fw_address_handler *
375 lookup_enclosing_address_handler(struct list_head *list,
376 unsigned long long offset, size_t length)
378 struct fw_address_handler *handler;
380 list_for_each_entry(handler, list, link) {
381 if (handler->offset <= offset &&
382 offset + length <= handler->offset + handler->length)
389 static DEFINE_SPINLOCK(address_handler_lock);
390 static LIST_HEAD(address_handler_list);
392 const struct fw_address_region fw_low_memory_region =
393 { .start = 0x000000000000ULL, .end = 0x000100000000ULL, };
394 const struct fw_address_region fw_high_memory_region =
395 { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, };
396 const struct fw_address_region fw_private_region =
397 { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, };
398 const struct fw_address_region fw_csr_region =
399 { .start = CSR_REGISTER_BASE,
400 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, };
401 const struct fw_address_region fw_unit_space_region =
402 { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, };
403 EXPORT_SYMBOL(fw_low_memory_region);
404 EXPORT_SYMBOL(fw_high_memory_region);
405 EXPORT_SYMBOL(fw_private_region);
406 EXPORT_SYMBOL(fw_csr_region);
407 EXPORT_SYMBOL(fw_unit_space_region);
410 * Allocate a range of addresses in the node space of the OHCI
411 * controller. When a request is received that falls within the
412 * specified address range, the specified callback is invoked. The
413 * parameters passed to the callback give the details of the
414 * particular request.
416 * Return value: 0 on success, non-zero otherwise.
417 * The start offset of the handler's address region is determined by
418 * fw_core_add_address_handler() and is returned in handler->offset.
419 * The offset is quadlet-aligned.
422 fw_core_add_address_handler(struct fw_address_handler *handler,
423 const struct fw_address_region *region)
425 struct fw_address_handler *other;
429 spin_lock_irqsave(&address_handler_lock, flags);
431 handler->offset = roundup(region->start, 4);
432 while (handler->offset + handler->length <= region->end) {
434 lookup_overlapping_address_handler(&address_handler_list,
439 roundup(other->offset + other->length, 4);
441 list_add_tail(&handler->link, &address_handler_list);
447 spin_unlock_irqrestore(&address_handler_lock, flags);
451 EXPORT_SYMBOL(fw_core_add_address_handler);
454 * Deallocate a range of addresses allocated with fw_allocate. This
455 * will call the associated callback one last time with a the special
456 * tcode TCODE_DEALLOCATE, to let the client destroy the registered
457 * callback data. For convenience, the callback parameters offset and
458 * length are set to the start and the length respectively for the
459 * deallocated region, payload is set to NULL.
461 void fw_core_remove_address_handler(struct fw_address_handler *handler)
465 spin_lock_irqsave(&address_handler_lock, flags);
466 list_del(&handler->link);
467 spin_unlock_irqrestore(&address_handler_lock, flags);
469 EXPORT_SYMBOL(fw_core_remove_address_handler);
472 struct fw_packet response;
473 u32 request_header[4];
480 free_response_callback(struct fw_packet *packet,
481 struct fw_card *card, int status)
483 struct fw_request *request;
485 request = container_of(packet, struct fw_request, response);
490 fw_fill_response(struct fw_packet *response, u32 *request_header,
491 int rcode, void *payload, size_t length)
493 int tcode, tlabel, extended_tcode, source, destination;
495 tcode = HEADER_GET_TCODE(request_header[0]);
496 tlabel = HEADER_GET_TLABEL(request_header[0]);
497 source = HEADER_GET_DESTINATION(request_header[0]);
498 destination = HEADER_GET_SOURCE(request_header[1]);
499 extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
501 response->header[0] =
502 HEADER_RETRY(RETRY_1) |
503 HEADER_TLABEL(tlabel) |
504 HEADER_DESTINATION(destination);
505 response->header[1] =
506 HEADER_SOURCE(source) |
508 response->header[2] = 0;
511 case TCODE_WRITE_QUADLET_REQUEST:
512 case TCODE_WRITE_BLOCK_REQUEST:
513 response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
514 response->header_length = 12;
515 response->payload_length = 0;
518 case TCODE_READ_QUADLET_REQUEST:
519 response->header[0] |=
520 HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
522 response->header[3] = *(u32 *)payload;
524 response->header[3] = 0;
525 response->header_length = 16;
526 response->payload_length = 0;
529 case TCODE_READ_BLOCK_REQUEST:
530 case TCODE_LOCK_REQUEST:
531 response->header[0] |= HEADER_TCODE(tcode + 2);
532 response->header[3] =
533 HEADER_DATA_LENGTH(length) |
534 HEADER_EXTENDED_TCODE(extended_tcode);
535 response->header_length = 16;
536 response->payload = payload;
537 response->payload_length = length;
545 EXPORT_SYMBOL(fw_fill_response);
547 static struct fw_request *
548 allocate_request(struct fw_packet *p)
550 struct fw_request *request;
552 int request_tcode, t;
554 request_tcode = HEADER_GET_TCODE(p->header[0]);
555 switch (request_tcode) {
556 case TCODE_WRITE_QUADLET_REQUEST:
557 data = &p->header[3];
561 case TCODE_WRITE_BLOCK_REQUEST:
562 case TCODE_LOCK_REQUEST:
564 length = HEADER_GET_DATA_LENGTH(p->header[3]);
567 case TCODE_READ_QUADLET_REQUEST:
572 case TCODE_READ_BLOCK_REQUEST:
574 length = HEADER_GET_DATA_LENGTH(p->header[3]);
582 request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
586 t = (p->timestamp & 0x1fff) + 4000;
588 t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000;
590 t = (p->timestamp & ~0x1fff) + t;
592 request->response.speed = p->speed;
593 request->response.timestamp = t;
594 request->response.generation = p->generation;
595 request->response.ack = 0;
596 request->response.callback = free_response_callback;
597 request->ack = p->ack;
598 request->length = length;
600 memcpy(request->data, data, length);
602 memcpy(request->request_header, p->header, sizeof(p->header));
608 fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
611 * Broadcast packets are reported as ACK_COMPLETE, so this
612 * check is sufficient to ensure we don't send response to
613 * broadcast packets or posted writes.
615 if (request->ack != ACK_PENDING) {
620 if (rcode == RCODE_COMPLETE)
621 fw_fill_response(&request->response, request->request_header,
622 rcode, request->data, request->length);
624 fw_fill_response(&request->response, request->request_header,
627 card->driver->send_response(card, &request->response);
629 EXPORT_SYMBOL(fw_send_response);
632 fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
634 struct fw_address_handler *handler;
635 struct fw_request *request;
636 unsigned long long offset;
638 int tcode, destination, source;
640 if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
643 request = allocate_request(p);
644 if (request == NULL) {
645 /* FIXME: send statically allocated busy packet. */
650 ((unsigned long long)
651 HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2];
652 tcode = HEADER_GET_TCODE(p->header[0]);
653 destination = HEADER_GET_DESTINATION(p->header[0]);
654 source = HEADER_GET_SOURCE(p->header[1]);
656 spin_lock_irqsave(&address_handler_lock, flags);
657 handler = lookup_enclosing_address_handler(&address_handler_list,
658 offset, request->length);
659 spin_unlock_irqrestore(&address_handler_lock, flags);
662 * FIXME: lookup the fw_node corresponding to the sender of
663 * this request and pass that to the address handler instead
664 * of the node ID. We may also want to move the address
665 * allocations to fw_node so we only do this callback if the
666 * upper layers registered it for this node.
670 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
672 handler->address_callback(card, request,
673 tcode, destination, source,
674 p->generation, p->speed, offset,
675 request->data, request->length,
676 handler->callback_data);
678 EXPORT_SYMBOL(fw_core_handle_request);
681 fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
683 struct fw_transaction *t;
687 int tcode, tlabel, destination, source, rcode;
689 tcode = HEADER_GET_TCODE(p->header[0]);
690 tlabel = HEADER_GET_TLABEL(p->header[0]);
691 destination = HEADER_GET_DESTINATION(p->header[0]);
692 source = HEADER_GET_SOURCE(p->header[1]);
693 rcode = HEADER_GET_RCODE(p->header[1]);
695 spin_lock_irqsave(&card->lock, flags);
696 list_for_each_entry(t, &card->transaction_list, link) {
697 if (t->node_id == source && t->tlabel == tlabel) {
699 card->tlabel_mask &= ~(1 << t->tlabel);
703 spin_unlock_irqrestore(&card->lock, flags);
705 if (&t->link == &card->transaction_list) {
706 fw_notify("Unsolicited response (source %x, tlabel %x)\n",
712 * FIXME: sanity check packet, is length correct, does tcodes
713 * and addresses match.
717 case TCODE_READ_QUADLET_RESPONSE:
718 data = (u32 *) &p->header[3];
722 case TCODE_WRITE_RESPONSE:
727 case TCODE_READ_BLOCK_RESPONSE:
728 case TCODE_LOCK_RESPONSE:
730 data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
734 /* Should never happen, this is just to shut up gcc. */
741 * The response handler may be executed while the request handler
742 * is still pending. Cancel the request handler.
744 card->driver->cancel_packet(card, &t->packet);
746 t->callback(card, rcode, data, data_length, t->callback_data);
748 EXPORT_SYMBOL(fw_core_handle_response);
750 static const struct fw_address_region topology_map_region =
751 { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP,
752 .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, };
755 handle_topology_map(struct fw_card *card, struct fw_request *request,
756 int tcode, int destination, int source,
757 int generation, int speed,
758 unsigned long long offset,
759 void *payload, size_t length, void *callback_data)
764 if (!TCODE_IS_READ_REQUEST(tcode)) {
765 fw_send_response(card, request, RCODE_TYPE_ERROR);
769 if ((offset & 3) > 0 || (length & 3) > 0) {
770 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
774 start = (offset - topology_map_region.start) / 4;
775 end = start + length / 4;
778 for (i = 0; i < length / 4; i++)
779 map[i] = cpu_to_be32(card->topology_map[start + i]);
781 fw_send_response(card, request, RCODE_COMPLETE);
784 static struct fw_address_handler topology_map = {
786 .address_callback = handle_topology_map,
789 static const struct fw_address_region registers_region =
790 { .start = CSR_REGISTER_BASE,
791 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, };
794 handle_registers(struct fw_card *card, struct fw_request *request,
795 int tcode, int destination, int source,
796 int generation, int speed,
797 unsigned long long offset,
798 void *payload, size_t length, void *callback_data)
800 int reg = offset & ~CSR_REGISTER_BASE;
801 unsigned long long bus_time;
802 __be32 *data = payload;
807 if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
808 fw_send_response(card, request, RCODE_TYPE_ERROR);
812 bus_time = card->driver->get_bus_time(card);
813 if (reg == CSR_CYCLE_TIME)
814 *data = cpu_to_be32(bus_time);
816 *data = cpu_to_be32(bus_time >> 25);
817 fw_send_response(card, request, RCODE_COMPLETE);
820 case CSR_BUS_MANAGER_ID:
821 case CSR_BANDWIDTH_AVAILABLE:
822 case CSR_CHANNELS_AVAILABLE_HI:
823 case CSR_CHANNELS_AVAILABLE_LO:
825 * FIXME: these are handled by the OHCI hardware and
826 * the stack never sees these request. If we add
827 * support for a new type of controller that doesn't
828 * handle this in hardware we need to deal with these
834 case CSR_BUSY_TIMEOUT:
835 /* FIXME: Implement this. */
837 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
842 static struct fw_address_handler registers = {
844 .address_callback = handle_registers,
847 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
848 MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
849 MODULE_LICENSE("GPL");
851 static const u32 vendor_textual_descriptor[] = {
852 /* textual descriptor leaf () */
856 0x4c696e75, /* L i n u */
857 0x78204669, /* x F i */
858 0x72657769, /* r e w i */
859 0x72650000, /* r e */
862 static const u32 model_textual_descriptor[] = {
863 /* model descriptor leaf () */
867 0x4a756a75, /* J u j u */
870 static struct fw_descriptor vendor_id_descriptor = {
871 .length = ARRAY_SIZE(vendor_textual_descriptor),
872 .immediate = 0x03d00d1e,
874 .data = vendor_textual_descriptor,
877 static struct fw_descriptor model_id_descriptor = {
878 .length = ARRAY_SIZE(model_textual_descriptor),
879 .immediate = 0x17000001,
881 .data = model_textual_descriptor,
884 static int __init fw_core_init(void)
888 retval = bus_register(&fw_bus_type);
892 fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
893 if (fw_cdev_major < 0) {
894 bus_unregister(&fw_bus_type);
895 return fw_cdev_major;
898 retval = fw_core_add_address_handler(&topology_map,
899 &topology_map_region);
902 retval = fw_core_add_address_handler(®isters,
906 /* Add the vendor textual descriptor. */
907 retval = fw_core_add_descriptor(&vendor_id_descriptor);
909 retval = fw_core_add_descriptor(&model_id_descriptor);
915 static void __exit fw_core_cleanup(void)
917 unregister_chrdev(fw_cdev_major, "firewire");
918 bus_unregister(&fw_bus_type);
921 module_init(fw_core_init);
922 module_exit(fw_core_cleanup);