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)
67 static int close_transaction(struct fw_transaction *transaction,
68 struct fw_card *card, int rcode)
70 struct fw_transaction *t;
73 spin_lock_irqsave(&card->lock, flags);
74 list_for_each_entry(t, &card->transaction_list, link) {
75 if (t == transaction) {
77 card->tlabel_mask &= ~(1 << t->tlabel);
81 spin_unlock_irqrestore(&card->lock, flags);
83 if (&t->link != &card->transaction_list) {
84 t->callback(card, rcode, NULL, 0, t->callback_data);
92 * Only valid for transactions that are potentially pending (ie have
95 int fw_cancel_transaction(struct fw_card *card,
96 struct fw_transaction *transaction)
99 * Cancel the packet transmission if it's still queued. That
100 * will call the packet transmission callback which cancels
104 if (card->driver->cancel_packet(card, &transaction->packet) == 0)
108 * If the request packet has already been sent, we need to see
109 * if the transaction is still pending and remove it in that case.
112 return close_transaction(transaction, card, RCODE_CANCELLED);
114 EXPORT_SYMBOL(fw_cancel_transaction);
116 static void transmit_complete_callback(struct fw_packet *packet,
117 struct fw_card *card, int status)
119 struct fw_transaction *t =
120 container_of(packet, struct fw_transaction, packet);
124 close_transaction(t, card, RCODE_COMPLETE);
127 t->timestamp = packet->timestamp;
132 close_transaction(t, card, RCODE_BUSY);
135 close_transaction(t, card, RCODE_DATA_ERROR);
138 close_transaction(t, card, RCODE_TYPE_ERROR);
142 * In this case the ack is really a juju specific
143 * rcode, so just forward that to the callback.
145 close_transaction(t, card, status);
150 static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
151 int destination_id, int source_id, int generation, int speed,
152 unsigned long long offset, void *payload, size_t length)
156 if (tcode == TCODE_STREAM_DATA) {
158 HEADER_DATA_LENGTH(length) |
160 HEADER_TCODE(TCODE_STREAM_DATA);
161 packet->header_length = 4;
162 packet->payload = payload;
163 packet->payload_length = length;
169 ext_tcode = tcode & ~0x10;
170 tcode = TCODE_LOCK_REQUEST;
175 HEADER_RETRY(RETRY_X) |
176 HEADER_TLABEL(tlabel) |
177 HEADER_TCODE(tcode) |
178 HEADER_DESTINATION(destination_id);
180 HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
185 case TCODE_WRITE_QUADLET_REQUEST:
186 packet->header[3] = *(u32 *)payload;
187 packet->header_length = 16;
188 packet->payload_length = 0;
191 case TCODE_LOCK_REQUEST:
192 case TCODE_WRITE_BLOCK_REQUEST:
194 HEADER_DATA_LENGTH(length) |
195 HEADER_EXTENDED_TCODE(ext_tcode);
196 packet->header_length = 16;
197 packet->payload = payload;
198 packet->payload_length = length;
201 case TCODE_READ_QUADLET_REQUEST:
202 packet->header_length = 12;
203 packet->payload_length = 0;
206 case TCODE_READ_BLOCK_REQUEST:
208 HEADER_DATA_LENGTH(length) |
209 HEADER_EXTENDED_TCODE(ext_tcode);
210 packet->header_length = 16;
211 packet->payload_length = 0;
215 packet->speed = speed;
216 packet->generation = generation;
218 packet->payload_bus = 0;
222 * This function provides low-level access to the IEEE1394 transaction
223 * logic. Most C programs would use either fw_read(), fw_write() or
224 * fw_lock() instead - those function are convenience wrappers for
225 * this function. The fw_send_request() function is primarily
226 * provided as a flexible, one-stop entry point for languages bindings
227 * and protocol bindings.
229 * FIXME: Document this function further, in particular the possible
230 * values for rcode in the callback. In short, we map ACK_COMPLETE to
231 * RCODE_COMPLETE, internal errors set errno and set rcode to
232 * RCODE_SEND_ERROR (which is out of range for standard ieee1394
233 * rcodes). All other rcodes are forwarded unchanged. For all
234 * errors, payload is NULL, length is 0.
236 * Can not expect the callback to be called before the function
237 * returns, though this does happen in some cases (ACK_COMPLETE and
240 * The payload is only used for write requests and must not be freed
241 * until the callback has been called.
243 * @param card the card from which to send the request
244 * @param tcode the tcode for this transaction. Do not use
245 * TCODE_LOCK_REQUEST directly, instead use TCODE_LOCK_MASK_SWAP
246 * etc. to specify tcode and ext_tcode.
247 * @param node_id the destination node ID (bus ID and PHY ID concatenated)
248 * @param generation the generation for which node_id is valid
249 * @param speed the speed to use for sending the request
250 * @param offset the 48 bit offset on the destination node
251 * @param payload the data payload for the request subaction
252 * @param length the length in bytes of the data to read
253 * @param callback function to be called when the transaction is completed
254 * @param callback_data pointer to arbitrary data, which will be
255 * passed to the callback
257 * In case of asynchronous stream packets i.e. TCODE_STREAM_DATA, the caller
258 * needs to synthesize @destination_id with fw_stream_packet_destination_id().
260 void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode,
261 int destination_id, int generation, int speed,
262 unsigned long long offset, void *payload, size_t length,
263 fw_transaction_callback_t callback, void *callback_data)
269 * Bump the flush timer up 100ms first of all so we
270 * don't race with a flush timer callback.
273 mod_timer(&card->flush_timer, jiffies + DIV_ROUND_UP(HZ, 10));
276 * Allocate tlabel from the bitmap and put the transaction on
277 * the list while holding the card spinlock.
280 spin_lock_irqsave(&card->lock, flags);
282 tlabel = card->current_tlabel;
283 if (card->tlabel_mask & (1 << tlabel)) {
284 spin_unlock_irqrestore(&card->lock, flags);
285 callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data);
289 card->current_tlabel = (card->current_tlabel + 1) & 0x1f;
290 card->tlabel_mask |= (1 << tlabel);
292 t->node_id = destination_id;
294 t->callback = callback;
295 t->callback_data = callback_data;
297 fw_fill_request(&t->packet, tcode, t->tlabel,
298 destination_id, card->node_id, generation,
299 speed, offset, payload, length);
300 t->packet.callback = transmit_complete_callback;
302 list_add_tail(&t->link, &card->transaction_list);
304 spin_unlock_irqrestore(&card->lock, flags);
306 card->driver->send_request(card, &t->packet);
308 EXPORT_SYMBOL(fw_send_request);
310 struct transaction_callback_data {
311 struct completion done;
316 static void transaction_callback(struct fw_card *card, int rcode,
317 void *payload, size_t length, void *data)
319 struct transaction_callback_data *d = data;
321 if (rcode == RCODE_COMPLETE)
322 memcpy(d->payload, payload, length);
328 * fw_run_transaction - send request and sleep until transaction is completed
332 int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
333 int generation, int speed, unsigned long long offset,
334 void *payload, size_t length)
336 struct transaction_callback_data d;
337 struct fw_transaction t;
339 init_completion(&d.done);
341 fw_send_request(card, &t, tcode, destination_id, generation, speed,
342 offset, payload, length, transaction_callback, &d);
343 wait_for_completion(&d.done);
347 EXPORT_SYMBOL(fw_run_transaction);
349 static DEFINE_MUTEX(phy_config_mutex);
350 static DECLARE_COMPLETION(phy_config_done);
352 static void transmit_phy_packet_callback(struct fw_packet *packet,
353 struct fw_card *card, int status)
355 complete(&phy_config_done);
358 static struct fw_packet phy_config_packet = {
362 .callback = transmit_phy_packet_callback,
365 void fw_send_phy_config(struct fw_card *card,
366 int node_id, int generation, int gap_count)
368 long timeout = DIV_ROUND_UP(HZ, 10);
369 u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG) |
370 PHY_CONFIG_ROOT_ID(node_id) |
371 PHY_CONFIG_GAP_COUNT(gap_count);
373 mutex_lock(&phy_config_mutex);
375 phy_config_packet.header[0] = data;
376 phy_config_packet.header[1] = ~data;
377 phy_config_packet.generation = generation;
378 INIT_COMPLETION(phy_config_done);
380 card->driver->send_request(card, &phy_config_packet);
381 wait_for_completion_timeout(&phy_config_done, timeout);
383 mutex_unlock(&phy_config_mutex);
386 void fw_flush_transactions(struct fw_card *card)
388 struct fw_transaction *t, *next;
389 struct list_head list;
392 INIT_LIST_HEAD(&list);
393 spin_lock_irqsave(&card->lock, flags);
394 list_splice_init(&card->transaction_list, &list);
395 card->tlabel_mask = 0;
396 spin_unlock_irqrestore(&card->lock, flags);
398 list_for_each_entry_safe(t, next, &list, link) {
399 card->driver->cancel_packet(card, &t->packet);
402 * At this point cancel_packet will never call the
403 * transaction callback, since we just took all the
404 * transactions out of the list. So do it here.
406 t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data);
410 static struct fw_address_handler *lookup_overlapping_address_handler(
411 struct list_head *list, unsigned long long offset, size_t length)
413 struct fw_address_handler *handler;
415 list_for_each_entry(handler, list, link) {
416 if (handler->offset < offset + length &&
417 offset < handler->offset + handler->length)
424 static struct fw_address_handler *lookup_enclosing_address_handler(
425 struct list_head *list, unsigned long long offset, size_t length)
427 struct fw_address_handler *handler;
429 list_for_each_entry(handler, list, link) {
430 if (handler->offset <= offset &&
431 offset + length <= handler->offset + handler->length)
438 static DEFINE_SPINLOCK(address_handler_lock);
439 static LIST_HEAD(address_handler_list);
441 const struct fw_address_region fw_high_memory_region =
442 { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, };
443 EXPORT_SYMBOL(fw_high_memory_region);
446 const struct fw_address_region fw_low_memory_region =
447 { .start = 0x000000000000ULL, .end = 0x000100000000ULL, };
448 const struct fw_address_region fw_private_region =
449 { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, };
450 const struct fw_address_region fw_csr_region =
451 { .start = CSR_REGISTER_BASE,
452 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, };
453 const struct fw_address_region fw_unit_space_region =
454 { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, };
458 * fw_core_add_address_handler - register for incoming requests
460 * @region: region in the IEEE 1212 node space address range
462 * region->start, ->end, and handler->length have to be quadlet-aligned.
464 * When a request is received that falls within the specified address range,
465 * the specified callback is invoked. The parameters passed to the callback
466 * give the details of the particular request.
468 * Return value: 0 on success, non-zero otherwise.
469 * The start offset of the handler's address region is determined by
470 * fw_core_add_address_handler() and is returned in handler->offset.
472 int fw_core_add_address_handler(struct fw_address_handler *handler,
473 const struct fw_address_region *region)
475 struct fw_address_handler *other;
479 if (region->start & 0xffff000000000003ULL ||
480 region->end & 0xffff000000000003ULL ||
481 region->start >= region->end ||
482 handler->length & 3 ||
483 handler->length == 0)
486 spin_lock_irqsave(&address_handler_lock, flags);
488 handler->offset = region->start;
489 while (handler->offset + handler->length <= region->end) {
491 lookup_overlapping_address_handler(&address_handler_list,
495 handler->offset += other->length;
497 list_add_tail(&handler->link, &address_handler_list);
503 spin_unlock_irqrestore(&address_handler_lock, flags);
507 EXPORT_SYMBOL(fw_core_add_address_handler);
510 * fw_core_remove_address_handler - unregister an address handler
512 void fw_core_remove_address_handler(struct fw_address_handler *handler)
516 spin_lock_irqsave(&address_handler_lock, flags);
517 list_del(&handler->link);
518 spin_unlock_irqrestore(&address_handler_lock, flags);
520 EXPORT_SYMBOL(fw_core_remove_address_handler);
523 struct fw_packet response;
524 u32 request_header[4];
530 static void free_response_callback(struct fw_packet *packet,
531 struct fw_card *card, int status)
533 struct fw_request *request;
535 request = container_of(packet, struct fw_request, response);
539 void fw_fill_response(struct fw_packet *response, u32 *request_header,
540 int rcode, void *payload, size_t length)
542 int tcode, tlabel, extended_tcode, source, destination;
544 tcode = HEADER_GET_TCODE(request_header[0]);
545 tlabel = HEADER_GET_TLABEL(request_header[0]);
546 source = HEADER_GET_DESTINATION(request_header[0]);
547 destination = HEADER_GET_SOURCE(request_header[1]);
548 extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
550 response->header[0] =
551 HEADER_RETRY(RETRY_1) |
552 HEADER_TLABEL(tlabel) |
553 HEADER_DESTINATION(destination);
554 response->header[1] =
555 HEADER_SOURCE(source) |
557 response->header[2] = 0;
560 case TCODE_WRITE_QUADLET_REQUEST:
561 case TCODE_WRITE_BLOCK_REQUEST:
562 response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
563 response->header_length = 12;
564 response->payload_length = 0;
567 case TCODE_READ_QUADLET_REQUEST:
568 response->header[0] |=
569 HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
571 response->header[3] = *(u32 *)payload;
573 response->header[3] = 0;
574 response->header_length = 16;
575 response->payload_length = 0;
578 case TCODE_READ_BLOCK_REQUEST:
579 case TCODE_LOCK_REQUEST:
580 response->header[0] |= HEADER_TCODE(tcode + 2);
581 response->header[3] =
582 HEADER_DATA_LENGTH(length) |
583 HEADER_EXTENDED_TCODE(extended_tcode);
584 response->header_length = 16;
585 response->payload = payload;
586 response->payload_length = length;
594 response->payload_bus = 0;
596 EXPORT_SYMBOL(fw_fill_response);
598 static struct fw_request *allocate_request(struct fw_packet *p)
600 struct fw_request *request;
602 int request_tcode, t;
604 request_tcode = HEADER_GET_TCODE(p->header[0]);
605 switch (request_tcode) {
606 case TCODE_WRITE_QUADLET_REQUEST:
607 data = &p->header[3];
611 case TCODE_WRITE_BLOCK_REQUEST:
612 case TCODE_LOCK_REQUEST:
614 length = HEADER_GET_DATA_LENGTH(p->header[3]);
617 case TCODE_READ_QUADLET_REQUEST:
622 case TCODE_READ_BLOCK_REQUEST:
624 length = HEADER_GET_DATA_LENGTH(p->header[3]);
628 fw_error("ERROR - corrupt request received - %08x %08x %08x\n",
629 p->header[0], p->header[1], p->header[2]);
633 request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
637 t = (p->timestamp & 0x1fff) + 4000;
639 t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000;
641 t = (p->timestamp & ~0x1fff) + t;
643 request->response.speed = p->speed;
644 request->response.timestamp = t;
645 request->response.generation = p->generation;
646 request->response.ack = 0;
647 request->response.callback = free_response_callback;
648 request->ack = p->ack;
649 request->length = length;
651 memcpy(request->data, data, length);
653 memcpy(request->request_header, p->header, sizeof(p->header));
658 void fw_send_response(struct fw_card *card,
659 struct fw_request *request, int rcode)
661 /* unified transaction or broadcast transaction: don't respond */
662 if (request->ack != ACK_PENDING ||
663 HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) {
668 if (rcode == RCODE_COMPLETE)
669 fw_fill_response(&request->response, request->request_header,
670 rcode, request->data, request->length);
672 fw_fill_response(&request->response, request->request_header,
675 card->driver->send_response(card, &request->response);
677 EXPORT_SYMBOL(fw_send_response);
679 void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
681 struct fw_address_handler *handler;
682 struct fw_request *request;
683 unsigned long long offset;
685 int tcode, destination, source;
687 if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
690 request = allocate_request(p);
691 if (request == NULL) {
692 /* FIXME: send statically allocated busy packet. */
697 ((unsigned long long)
698 HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2];
699 tcode = HEADER_GET_TCODE(p->header[0]);
700 destination = HEADER_GET_DESTINATION(p->header[0]);
701 source = HEADER_GET_SOURCE(p->header[1]);
703 spin_lock_irqsave(&address_handler_lock, flags);
704 handler = lookup_enclosing_address_handler(&address_handler_list,
705 offset, request->length);
706 spin_unlock_irqrestore(&address_handler_lock, flags);
709 * FIXME: lookup the fw_node corresponding to the sender of
710 * this request and pass that to the address handler instead
711 * of the node ID. We may also want to move the address
712 * allocations to fw_node so we only do this callback if the
713 * upper layers registered it for this node.
717 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
719 handler->address_callback(card, request,
720 tcode, destination, source,
721 p->generation, p->speed, offset,
722 request->data, request->length,
723 handler->callback_data);
725 EXPORT_SYMBOL(fw_core_handle_request);
727 void 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, };
800 static void handle_topology_map(struct fw_card *card, struct fw_request *request,
801 int tcode, int destination, int source, int generation,
802 int speed, unsigned long long offset,
803 void *payload, size_t length, void *callback_data)
808 if (!TCODE_IS_READ_REQUEST(tcode)) {
809 fw_send_response(card, request, RCODE_TYPE_ERROR);
813 if ((offset & 3) > 0 || (length & 3) > 0) {
814 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
818 start = (offset - topology_map_region.start) / 4;
819 end = start + length / 4;
822 for (i = 0; i < length / 4; i++)
823 map[i] = cpu_to_be32(card->topology_map[start + i]);
825 fw_send_response(card, request, RCODE_COMPLETE);
828 static struct fw_address_handler topology_map = {
830 .address_callback = handle_topology_map,
833 static const struct fw_address_region registers_region =
834 { .start = CSR_REGISTER_BASE,
835 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, };
837 static void handle_registers(struct fw_card *card, struct fw_request *request,
838 int tcode, int destination, int source, int generation,
839 int speed, unsigned long long offset,
840 void *payload, size_t length, void *callback_data)
842 int reg = offset & ~CSR_REGISTER_BASE;
843 unsigned long long bus_time;
844 __be32 *data = payload;
845 int rcode = RCODE_COMPLETE;
850 if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
851 rcode = RCODE_TYPE_ERROR;
855 bus_time = card->driver->get_bus_time(card);
856 if (reg == CSR_CYCLE_TIME)
857 *data = cpu_to_be32(bus_time);
859 *data = cpu_to_be32(bus_time >> 25);
862 case CSR_BROADCAST_CHANNEL:
863 if (tcode == TCODE_READ_QUADLET_REQUEST)
864 *data = cpu_to_be32(card->broadcast_channel);
865 else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
866 card->broadcast_channel =
867 (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) |
868 BROADCAST_CHANNEL_INITIAL;
870 rcode = RCODE_TYPE_ERROR;
873 case CSR_BUS_MANAGER_ID:
874 case CSR_BANDWIDTH_AVAILABLE:
875 case CSR_CHANNELS_AVAILABLE_HI:
876 case CSR_CHANNELS_AVAILABLE_LO:
878 * FIXME: these are handled by the OHCI hardware and
879 * the stack never sees these request. If we add
880 * support for a new type of controller that doesn't
881 * handle this in hardware we need to deal with these
887 case CSR_BUSY_TIMEOUT:
888 /* FIXME: Implement this. */
891 rcode = RCODE_ADDRESS_ERROR;
895 fw_send_response(card, request, rcode);
898 static struct fw_address_handler registers = {
900 .address_callback = handle_registers,
903 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
904 MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
905 MODULE_LICENSE("GPL");
907 static const u32 vendor_textual_descriptor[] = {
908 /* textual descriptor leaf () */
912 0x4c696e75, /* L i n u */
913 0x78204669, /* x F i */
914 0x72657769, /* r e w i */
915 0x72650000, /* r e */
918 static const u32 model_textual_descriptor[] = {
919 /* model descriptor leaf () */
923 0x4a756a75, /* J u j u */
926 static struct fw_descriptor vendor_id_descriptor = {
927 .length = ARRAY_SIZE(vendor_textual_descriptor),
928 .immediate = 0x03d00d1e,
930 .data = vendor_textual_descriptor,
933 static struct fw_descriptor model_id_descriptor = {
934 .length = ARRAY_SIZE(model_textual_descriptor),
935 .immediate = 0x17000001,
937 .data = model_textual_descriptor,
940 static int __init fw_core_init(void)
944 ret = bus_register(&fw_bus_type);
948 fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
949 if (fw_cdev_major < 0) {
950 bus_unregister(&fw_bus_type);
951 return fw_cdev_major;
954 fw_core_add_address_handler(&topology_map, &topology_map_region);
955 fw_core_add_address_handler(®isters, ®isters_region);
956 fw_core_add_descriptor(&vendor_id_descriptor);
957 fw_core_add_descriptor(&model_id_descriptor);
962 static void __exit fw_core_cleanup(void)
964 unregister_chrdev(fw_cdev_major, "firewire");
965 bus_unregister(&fw_bus_type);
966 idr_destroy(&fw_device_idr);
969 module_init(fw_core_init);
970 module_exit(fw_core_cleanup);