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/idr.h>
23 #include <linux/kernel.h>
24 #include <linux/kref.h>
25 #include <linux/module.h>
26 #include <linux/mutex.h>
27 #include <linux/init.h>
28 #include <linux/interrupt.h>
29 #include <linux/pci.h>
30 #include <linux/delay.h>
31 #include <linux/poll.h>
32 #include <linux/list.h>
33 #include <linux/kthread.h>
34 #include <asm/uaccess.h>
36 #include "fw-transaction.h"
37 #include "fw-topology.h"
38 #include "fw-device.h"
40 #define HEADER_PRI(pri) ((pri) << 0)
41 #define HEADER_TCODE(tcode) ((tcode) << 4)
42 #define HEADER_RETRY(retry) ((retry) << 8)
43 #define HEADER_TLABEL(tlabel) ((tlabel) << 10)
44 #define HEADER_DESTINATION(destination) ((destination) << 16)
45 #define HEADER_SOURCE(source) ((source) << 16)
46 #define HEADER_RCODE(rcode) ((rcode) << 12)
47 #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0)
48 #define HEADER_DATA_LENGTH(length) ((length) << 16)
49 #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0)
51 #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f)
52 #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f)
53 #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f)
54 #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff)
55 #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff)
56 #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff)
57 #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff)
58 #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff)
60 #define HEADER_DESTINATION_IS_BROADCAST(q) \
61 (((q) & HEADER_DESTINATION(0x3f)) == HEADER_DESTINATION(0x3f))
63 #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22))
64 #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23))
65 #define PHY_IDENTIFIER(id) ((id) << 30)
68 close_transaction(struct fw_transaction *transaction,
69 struct fw_card *card, int rcode,
70 u32 *payload, size_t length)
72 struct fw_transaction *t;
75 spin_lock_irqsave(&card->lock, flags);
76 list_for_each_entry(t, &card->transaction_list, link) {
77 if (t == transaction) {
79 card->tlabel_mask &= ~(1 << t->tlabel);
83 spin_unlock_irqrestore(&card->lock, flags);
85 if (&t->link != &card->transaction_list) {
86 t->callback(card, rcode, payload, length, t->callback_data);
94 * Only valid for transactions that are potentially pending (ie have
98 fw_cancel_transaction(struct fw_card *card,
99 struct fw_transaction *transaction)
102 * Cancel the packet transmission if it's still queued. That
103 * will call the packet transmission callback which cancels
107 if (card->driver->cancel_packet(card, &transaction->packet) == 0)
111 * If the request packet has already been sent, we need to see
112 * if the transaction is still pending and remove it in that case.
115 return close_transaction(transaction, card, RCODE_CANCELLED, NULL, 0);
117 EXPORT_SYMBOL(fw_cancel_transaction);
120 transmit_complete_callback(struct fw_packet *packet,
121 struct fw_card *card, int status)
123 struct fw_transaction *t =
124 container_of(packet, struct fw_transaction, packet);
128 close_transaction(t, card, RCODE_COMPLETE, NULL, 0);
131 t->timestamp = packet->timestamp;
136 close_transaction(t, card, RCODE_BUSY, NULL, 0);
139 close_transaction(t, card, RCODE_DATA_ERROR, NULL, 0);
142 close_transaction(t, card, RCODE_TYPE_ERROR, NULL, 0);
146 * In this case the ack is really a juju specific
147 * rcode, so just forward that to the callback.
149 close_transaction(t, card, status, NULL, 0);
155 fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
156 int destination_id, int source_id, int generation, int speed,
157 unsigned long long offset, void *payload, size_t length)
162 ext_tcode = tcode & ~0x10;
163 tcode = TCODE_LOCK_REQUEST;
168 HEADER_RETRY(RETRY_X) |
169 HEADER_TLABEL(tlabel) |
170 HEADER_TCODE(tcode) |
171 HEADER_DESTINATION(destination_id);
173 HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
178 case TCODE_WRITE_QUADLET_REQUEST:
179 packet->header[3] = *(u32 *)payload;
180 packet->header_length = 16;
181 packet->payload_length = 0;
184 case TCODE_LOCK_REQUEST:
185 case TCODE_WRITE_BLOCK_REQUEST:
187 HEADER_DATA_LENGTH(length) |
188 HEADER_EXTENDED_TCODE(ext_tcode);
189 packet->header_length = 16;
190 packet->payload = payload;
191 packet->payload_length = length;
194 case TCODE_READ_QUADLET_REQUEST:
195 packet->header_length = 12;
196 packet->payload_length = 0;
199 case TCODE_READ_BLOCK_REQUEST:
201 HEADER_DATA_LENGTH(length) |
202 HEADER_EXTENDED_TCODE(ext_tcode);
203 packet->header_length = 16;
204 packet->payload_length = 0;
208 packet->speed = speed;
209 packet->generation = generation;
211 packet->payload_bus = 0;
215 * This function provides low-level access to the IEEE1394 transaction
216 * logic. Most C programs would use either fw_read(), fw_write() or
217 * fw_lock() instead - those function are convenience wrappers for
218 * this function. The fw_send_request() function is primarily
219 * provided as a flexible, one-stop entry point for languages bindings
220 * and protocol bindings.
222 * FIXME: Document this function further, in particular the possible
223 * values for rcode in the callback. In short, we map ACK_COMPLETE to
224 * RCODE_COMPLETE, internal errors set errno and set rcode to
225 * RCODE_SEND_ERROR (which is out of range for standard ieee1394
226 * rcodes). All other rcodes are forwarded unchanged. For all
227 * errors, payload is NULL, length is 0.
229 * Can not expect the callback to be called before the function
230 * returns, though this does happen in some cases (ACK_COMPLETE and
233 * The payload is only used for write requests and must not be freed
234 * until the callback has been called.
236 * @param card the card from which to send the request
237 * @param tcode the tcode for this transaction. Do not use
238 * TCODE_LOCK_REQUEST directly, instead use TCODE_LOCK_MASK_SWAP
239 * etc. to specify tcode and ext_tcode.
240 * @param node_id the destination node ID (bus ID and PHY ID concatenated)
241 * @param generation the generation for which node_id is valid
242 * @param speed the speed to use for sending the request
243 * @param offset the 48 bit offset on the destination node
244 * @param payload the data payload for the request subaction
245 * @param length the length in bytes of the data to read
246 * @param callback function to be called when the transaction is completed
247 * @param callback_data pointer to arbitrary data, which will be
248 * passed to the callback
251 fw_send_request(struct fw_card *card, struct fw_transaction *t,
252 int tcode, int destination_id, int generation, int speed,
253 unsigned long long offset,
254 void *payload, size_t length,
255 fw_transaction_callback_t callback, void *callback_data)
261 * Bump the flush timer up 100ms first of all so we
262 * don't race with a flush timer callback.
265 mod_timer(&card->flush_timer, jiffies + DIV_ROUND_UP(HZ, 10));
268 * Allocate tlabel from the bitmap and put the transaction on
269 * the list while holding the card spinlock.
272 spin_lock_irqsave(&card->lock, flags);
274 tlabel = card->current_tlabel;
275 if (card->tlabel_mask & (1 << tlabel)) {
276 spin_unlock_irqrestore(&card->lock, flags);
277 callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data);
281 card->current_tlabel = (card->current_tlabel + 1) & 0x1f;
282 card->tlabel_mask |= (1 << tlabel);
284 t->node_id = destination_id;
286 t->callback = callback;
287 t->callback_data = callback_data;
289 fw_fill_request(&t->packet, tcode, t->tlabel,
290 destination_id, card->node_id, generation,
291 speed, offset, payload, length);
292 t->packet.callback = transmit_complete_callback;
294 list_add_tail(&t->link, &card->transaction_list);
296 spin_unlock_irqrestore(&card->lock, flags);
298 card->driver->send_request(card, &t->packet);
300 EXPORT_SYMBOL(fw_send_request);
302 struct transaction_callback_data {
303 struct completion done;
308 static void transaction_callback(struct fw_card *card, int rcode,
309 void *payload, size_t length, void *data)
311 struct transaction_callback_data *d = data;
313 if (rcode == RCODE_COMPLETE)
314 memcpy(d->payload, payload, length);
320 * fw_run_transaction - send request and sleep until transaction is completed
324 int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
325 int generation, int speed, unsigned long long offset,
326 void *data, size_t length)
328 struct transaction_callback_data d;
329 struct fw_transaction t;
331 init_completion(&d.done);
333 fw_send_request(card, &t, tcode, destination_id, generation, speed,
334 offset, data, length, transaction_callback, &d);
335 wait_for_completion(&d.done);
339 EXPORT_SYMBOL(fw_run_transaction);
341 static DEFINE_MUTEX(phy_config_mutex);
342 static DECLARE_COMPLETION(phy_config_done);
344 static void transmit_phy_packet_callback(struct fw_packet *packet,
345 struct fw_card *card, int status)
347 complete(&phy_config_done);
350 static struct fw_packet phy_config_packet = {
354 .callback = transmit_phy_packet_callback,
357 void fw_send_phy_config(struct fw_card *card,
358 int node_id, int generation, int gap_count)
360 long timeout = DIV_ROUND_UP(HZ, 10);
361 u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG) |
362 PHY_CONFIG_ROOT_ID(node_id) |
363 PHY_CONFIG_GAP_COUNT(gap_count);
365 mutex_lock(&phy_config_mutex);
367 phy_config_packet.header[0] = data;
368 phy_config_packet.header[1] = ~data;
369 phy_config_packet.generation = generation;
370 INIT_COMPLETION(phy_config_done);
372 card->driver->send_request(card, &phy_config_packet);
373 wait_for_completion_timeout(&phy_config_done, timeout);
375 mutex_unlock(&phy_config_mutex);
378 void fw_flush_transactions(struct fw_card *card)
380 struct fw_transaction *t, *next;
381 struct list_head list;
384 INIT_LIST_HEAD(&list);
385 spin_lock_irqsave(&card->lock, flags);
386 list_splice_init(&card->transaction_list, &list);
387 card->tlabel_mask = 0;
388 spin_unlock_irqrestore(&card->lock, flags);
390 list_for_each_entry_safe(t, next, &list, link) {
391 card->driver->cancel_packet(card, &t->packet);
394 * At this point cancel_packet will never call the
395 * transaction callback, since we just took all the
396 * transactions out of the list. So do it here.
398 t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data);
402 static struct fw_address_handler *
403 lookup_overlapping_address_handler(struct list_head *list,
404 unsigned long long offset, size_t length)
406 struct fw_address_handler *handler;
408 list_for_each_entry(handler, list, link) {
409 if (handler->offset < offset + length &&
410 offset < handler->offset + handler->length)
417 static struct fw_address_handler *
418 lookup_enclosing_address_handler(struct list_head *list,
419 unsigned long long offset, size_t length)
421 struct fw_address_handler *handler;
423 list_for_each_entry(handler, list, link) {
424 if (handler->offset <= offset &&
425 offset + length <= handler->offset + handler->length)
432 static DEFINE_SPINLOCK(address_handler_lock);
433 static LIST_HEAD(address_handler_list);
435 const struct fw_address_region fw_high_memory_region =
436 { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, };
437 EXPORT_SYMBOL(fw_high_memory_region);
440 const struct fw_address_region fw_low_memory_region =
441 { .start = 0x000000000000ULL, .end = 0x000100000000ULL, };
442 const struct fw_address_region fw_private_region =
443 { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, };
444 const struct fw_address_region fw_csr_region =
445 { .start = CSR_REGISTER_BASE,
446 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, };
447 const struct fw_address_region fw_unit_space_region =
448 { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, };
452 * fw_core_add_address_handler - register for incoming requests
454 * @region: region in the IEEE 1212 node space address range
456 * region->start, ->end, and handler->length have to be quadlet-aligned.
458 * When a request is received that falls within the specified address range,
459 * the specified callback is invoked. The parameters passed to the callback
460 * give the details of the particular request.
462 * Return value: 0 on success, non-zero otherwise.
463 * The start offset of the handler's address region is determined by
464 * fw_core_add_address_handler() and is returned in handler->offset.
467 fw_core_add_address_handler(struct fw_address_handler *handler,
468 const struct fw_address_region *region)
470 struct fw_address_handler *other;
474 if (region->start & 0xffff000000000003ULL ||
475 region->end & 0xffff000000000003ULL ||
476 region->start >= region->end ||
477 handler->length & 3 ||
478 handler->length == 0)
481 spin_lock_irqsave(&address_handler_lock, flags);
483 handler->offset = region->start;
484 while (handler->offset + handler->length <= region->end) {
486 lookup_overlapping_address_handler(&address_handler_list,
490 handler->offset += other->length;
492 list_add_tail(&handler->link, &address_handler_list);
498 spin_unlock_irqrestore(&address_handler_lock, flags);
502 EXPORT_SYMBOL(fw_core_add_address_handler);
505 * fw_core_remove_address_handler - unregister an address handler
507 void fw_core_remove_address_handler(struct fw_address_handler *handler)
511 spin_lock_irqsave(&address_handler_lock, flags);
512 list_del(&handler->link);
513 spin_unlock_irqrestore(&address_handler_lock, flags);
515 EXPORT_SYMBOL(fw_core_remove_address_handler);
518 struct fw_packet response;
519 u32 request_header[4];
526 free_response_callback(struct fw_packet *packet,
527 struct fw_card *card, int status)
529 struct fw_request *request;
531 request = container_of(packet, struct fw_request, response);
536 fw_fill_response(struct fw_packet *response, u32 *request_header,
537 int rcode, void *payload, size_t length)
539 int tcode, tlabel, extended_tcode, source, destination;
541 tcode = HEADER_GET_TCODE(request_header[0]);
542 tlabel = HEADER_GET_TLABEL(request_header[0]);
543 source = HEADER_GET_DESTINATION(request_header[0]);
544 destination = HEADER_GET_SOURCE(request_header[1]);
545 extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
547 response->header[0] =
548 HEADER_RETRY(RETRY_1) |
549 HEADER_TLABEL(tlabel) |
550 HEADER_DESTINATION(destination);
551 response->header[1] =
552 HEADER_SOURCE(source) |
554 response->header[2] = 0;
557 case TCODE_WRITE_QUADLET_REQUEST:
558 case TCODE_WRITE_BLOCK_REQUEST:
559 response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
560 response->header_length = 12;
561 response->payload_length = 0;
564 case TCODE_READ_QUADLET_REQUEST:
565 response->header[0] |=
566 HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
568 response->header[3] = *(u32 *)payload;
570 response->header[3] = 0;
571 response->header_length = 16;
572 response->payload_length = 0;
575 case TCODE_READ_BLOCK_REQUEST:
576 case TCODE_LOCK_REQUEST:
577 response->header[0] |= HEADER_TCODE(tcode + 2);
578 response->header[3] =
579 HEADER_DATA_LENGTH(length) |
580 HEADER_EXTENDED_TCODE(extended_tcode);
581 response->header_length = 16;
582 response->payload = payload;
583 response->payload_length = length;
591 response->payload_bus = 0;
593 EXPORT_SYMBOL(fw_fill_response);
595 static struct fw_request *
596 allocate_request(struct fw_packet *p)
598 struct fw_request *request;
600 int request_tcode, t;
602 request_tcode = HEADER_GET_TCODE(p->header[0]);
603 switch (request_tcode) {
604 case TCODE_WRITE_QUADLET_REQUEST:
605 data = &p->header[3];
609 case TCODE_WRITE_BLOCK_REQUEST:
610 case TCODE_LOCK_REQUEST:
612 length = HEADER_GET_DATA_LENGTH(p->header[3]);
615 case TCODE_READ_QUADLET_REQUEST:
620 case TCODE_READ_BLOCK_REQUEST:
622 length = HEADER_GET_DATA_LENGTH(p->header[3]);
626 fw_error("ERROR - corrupt request received - %08x %08x %08x\n",
627 p->header[0], p->header[1], p->header[2]);
631 request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
635 t = (p->timestamp & 0x1fff) + 4000;
637 t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000;
639 t = (p->timestamp & ~0x1fff) + t;
641 request->response.speed = p->speed;
642 request->response.timestamp = t;
643 request->response.generation = p->generation;
644 request->response.ack = 0;
645 request->response.callback = free_response_callback;
646 request->ack = p->ack;
647 request->length = length;
649 memcpy(request->data, data, length);
651 memcpy(request->request_header, p->header, sizeof(p->header));
657 fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
659 /* unified transaction or broadcast transaction: don't respond */
660 if (request->ack != ACK_PENDING ||
661 HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) {
666 if (rcode == RCODE_COMPLETE)
667 fw_fill_response(&request->response, request->request_header,
668 rcode, request->data, request->length);
670 fw_fill_response(&request->response, request->request_header,
673 card->driver->send_response(card, &request->response);
675 EXPORT_SYMBOL(fw_send_response);
678 fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
680 struct fw_address_handler *handler;
681 struct fw_request *request;
682 unsigned long long offset;
684 int tcode, destination, source;
686 if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
689 request = allocate_request(p);
690 if (request == NULL) {
691 /* FIXME: send statically allocated busy packet. */
696 ((unsigned long long)
697 HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2];
698 tcode = HEADER_GET_TCODE(p->header[0]);
699 destination = HEADER_GET_DESTINATION(p->header[0]);
700 source = HEADER_GET_SOURCE(p->header[1]);
702 spin_lock_irqsave(&address_handler_lock, flags);
703 handler = lookup_enclosing_address_handler(&address_handler_list,
704 offset, request->length);
705 spin_unlock_irqrestore(&address_handler_lock, flags);
708 * FIXME: lookup the fw_node corresponding to the sender of
709 * this request and pass that to the address handler instead
710 * of the node ID. We may also want to move the address
711 * allocations to fw_node so we only do this callback if the
712 * upper layers registered it for this node.
716 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
718 handler->address_callback(card, request,
719 tcode, destination, source,
720 p->generation, p->speed, offset,
721 request->data, request->length,
722 handler->callback_data);
724 EXPORT_SYMBOL(fw_core_handle_request);
727 fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
729 struct fw_transaction *t;
733 int tcode, tlabel, destination, source, rcode;
735 tcode = HEADER_GET_TCODE(p->header[0]);
736 tlabel = HEADER_GET_TLABEL(p->header[0]);
737 destination = HEADER_GET_DESTINATION(p->header[0]);
738 source = HEADER_GET_SOURCE(p->header[1]);
739 rcode = HEADER_GET_RCODE(p->header[1]);
741 spin_lock_irqsave(&card->lock, flags);
742 list_for_each_entry(t, &card->transaction_list, link) {
743 if (t->node_id == source && t->tlabel == tlabel) {
745 card->tlabel_mask &= ~(1 << t->tlabel);
749 spin_unlock_irqrestore(&card->lock, flags);
751 if (&t->link == &card->transaction_list) {
752 fw_notify("Unsolicited response (source %x, tlabel %x)\n",
758 * FIXME: sanity check packet, is length correct, does tcodes
759 * and addresses match.
763 case TCODE_READ_QUADLET_RESPONSE:
764 data = (u32 *) &p->header[3];
768 case TCODE_WRITE_RESPONSE:
773 case TCODE_READ_BLOCK_RESPONSE:
774 case TCODE_LOCK_RESPONSE:
776 data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
780 /* Should never happen, this is just to shut up gcc. */
787 * The response handler may be executed while the request handler
788 * is still pending. Cancel the request handler.
790 card->driver->cancel_packet(card, &t->packet);
792 t->callback(card, rcode, data, data_length, t->callback_data);
794 EXPORT_SYMBOL(fw_core_handle_response);
796 static const struct fw_address_region topology_map_region =
797 { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP,
798 .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, };
801 handle_topology_map(struct fw_card *card, struct fw_request *request,
802 int tcode, int destination, int source,
803 int generation, int speed,
804 unsigned long long offset,
805 void *payload, size_t length, void *callback_data)
810 if (!TCODE_IS_READ_REQUEST(tcode)) {
811 fw_send_response(card, request, RCODE_TYPE_ERROR);
815 if ((offset & 3) > 0 || (length & 3) > 0) {
816 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
820 start = (offset - topology_map_region.start) / 4;
821 end = start + length / 4;
824 for (i = 0; i < length / 4; i++)
825 map[i] = cpu_to_be32(card->topology_map[start + i]);
827 fw_send_response(card, request, RCODE_COMPLETE);
830 static struct fw_address_handler topology_map = {
832 .address_callback = handle_topology_map,
835 static const struct fw_address_region registers_region =
836 { .start = CSR_REGISTER_BASE,
837 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, };
840 handle_registers(struct fw_card *card, struct fw_request *request,
841 int tcode, int destination, int source,
842 int generation, int speed,
843 unsigned long long offset,
844 void *payload, size_t length, void *callback_data)
846 int reg = offset & ~CSR_REGISTER_BASE;
847 unsigned long long bus_time;
848 __be32 *data = payload;
849 int rcode = RCODE_COMPLETE;
854 if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
855 rcode = RCODE_TYPE_ERROR;
859 bus_time = card->driver->get_bus_time(card);
860 if (reg == CSR_CYCLE_TIME)
861 *data = cpu_to_be32(bus_time);
863 *data = cpu_to_be32(bus_time >> 25);
866 case CSR_BROADCAST_CHANNEL:
867 if (tcode == TCODE_READ_QUADLET_REQUEST)
868 *data = cpu_to_be32(card->broadcast_channel);
869 else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
870 card->broadcast_channel =
871 (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) |
872 BROADCAST_CHANNEL_INITIAL;
874 rcode = RCODE_TYPE_ERROR;
877 case CSR_BUS_MANAGER_ID:
878 case CSR_BANDWIDTH_AVAILABLE:
879 case CSR_CHANNELS_AVAILABLE_HI:
880 case CSR_CHANNELS_AVAILABLE_LO:
882 * FIXME: these are handled by the OHCI hardware and
883 * the stack never sees these request. If we add
884 * support for a new type of controller that doesn't
885 * handle this in hardware we need to deal with these
891 case CSR_BUSY_TIMEOUT:
892 /* FIXME: Implement this. */
895 rcode = RCODE_ADDRESS_ERROR;
899 fw_send_response(card, request, rcode);
902 static struct fw_address_handler registers = {
904 .address_callback = handle_registers,
907 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
908 MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
909 MODULE_LICENSE("GPL");
911 static const u32 vendor_textual_descriptor[] = {
912 /* textual descriptor leaf () */
916 0x4c696e75, /* L i n u */
917 0x78204669, /* x F i */
918 0x72657769, /* r e w i */
919 0x72650000, /* r e */
922 static const u32 model_textual_descriptor[] = {
923 /* model descriptor leaf () */
927 0x4a756a75, /* J u j u */
930 static struct fw_descriptor vendor_id_descriptor = {
931 .length = ARRAY_SIZE(vendor_textual_descriptor),
932 .immediate = 0x03d00d1e,
934 .data = vendor_textual_descriptor,
937 static struct fw_descriptor model_id_descriptor = {
938 .length = ARRAY_SIZE(model_textual_descriptor),
939 .immediate = 0x17000001,
941 .data = model_textual_descriptor,
944 static int __init fw_core_init(void)
948 retval = bus_register(&fw_bus_type);
952 fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
953 if (fw_cdev_major < 0) {
954 bus_unregister(&fw_bus_type);
955 return fw_cdev_major;
958 retval = fw_core_add_address_handler(&topology_map,
959 &topology_map_region);
962 retval = fw_core_add_address_handler(®isters,
966 /* Add the vendor textual descriptor. */
967 retval = fw_core_add_descriptor(&vendor_id_descriptor);
969 retval = fw_core_add_descriptor(&model_id_descriptor);
975 static void __exit fw_core_cleanup(void)
977 unregister_chrdev(fw_cdev_major, "firewire");
978 bus_unregister(&fw_bus_type);
979 idr_destroy(&fw_device_idr);
982 module_init(fw_core_init);
983 module_exit(fw_core_cleanup);