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,
69 u32 *payload, size_t length)
71 struct fw_transaction *t;
74 spin_lock_irqsave(&card->lock, flags);
75 list_for_each_entry(t, &card->transaction_list, link) {
76 if (t == transaction) {
78 card->tlabel_mask &= ~(1 << t->tlabel);
82 spin_unlock_irqrestore(&card->lock, flags);
84 if (&t->link != &card->transaction_list) {
85 t->callback(card, rcode, payload, length, t->callback_data);
93 * Only valid for transactions that are potentially pending (ie have
96 int fw_cancel_transaction(struct fw_card *card,
97 struct fw_transaction *transaction)
100 * Cancel the packet transmission if it's still queued. That
101 * will call the packet transmission callback which cancels
105 if (card->driver->cancel_packet(card, &transaction->packet) == 0)
109 * If the request packet has already been sent, we need to see
110 * if the transaction is still pending and remove it in that case.
113 return close_transaction(transaction, card, RCODE_CANCELLED, NULL, 0);
115 EXPORT_SYMBOL(fw_cancel_transaction);
117 static void transmit_complete_callback(struct fw_packet *packet,
118 struct fw_card *card, int status)
120 struct fw_transaction *t =
121 container_of(packet, struct fw_transaction, packet);
125 close_transaction(t, card, RCODE_COMPLETE, NULL, 0);
128 t->timestamp = packet->timestamp;
133 close_transaction(t, card, RCODE_BUSY, NULL, 0);
136 close_transaction(t, card, RCODE_DATA_ERROR, NULL, 0);
139 close_transaction(t, card, RCODE_TYPE_ERROR, NULL, 0);
143 * In this case the ack is really a juju specific
144 * rcode, so just forward that to the callback.
146 close_transaction(t, card, status, NULL, 0);
151 static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
152 int destination_id, int source_id, int generation, int speed,
153 unsigned long long offset, void *payload, size_t length)
157 if (tcode == TCODE_STREAM_DATA) {
159 HEADER_DATA_LENGTH(length) |
161 HEADER_TCODE(TCODE_STREAM_DATA);
162 packet->header_length = 4;
163 packet->payload = payload;
164 packet->payload_length = length;
170 ext_tcode = tcode & ~0x10;
171 tcode = TCODE_LOCK_REQUEST;
176 HEADER_RETRY(RETRY_X) |
177 HEADER_TLABEL(tlabel) |
178 HEADER_TCODE(tcode) |
179 HEADER_DESTINATION(destination_id);
181 HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
186 case TCODE_WRITE_QUADLET_REQUEST:
187 packet->header[3] = *(u32 *)payload;
188 packet->header_length = 16;
189 packet->payload_length = 0;
192 case TCODE_LOCK_REQUEST:
193 case TCODE_WRITE_BLOCK_REQUEST:
195 HEADER_DATA_LENGTH(length) |
196 HEADER_EXTENDED_TCODE(ext_tcode);
197 packet->header_length = 16;
198 packet->payload = payload;
199 packet->payload_length = length;
202 case TCODE_READ_QUADLET_REQUEST:
203 packet->header_length = 12;
204 packet->payload_length = 0;
207 case TCODE_READ_BLOCK_REQUEST:
209 HEADER_DATA_LENGTH(length) |
210 HEADER_EXTENDED_TCODE(ext_tcode);
211 packet->header_length = 16;
212 packet->payload_length = 0;
216 packet->speed = speed;
217 packet->generation = generation;
219 packet->payload_bus = 0;
223 * This function provides low-level access to the IEEE1394 transaction
224 * logic. Most C programs would use either fw_read(), fw_write() or
225 * fw_lock() instead - those function are convenience wrappers for
226 * this function. The fw_send_request() function is primarily
227 * provided as a flexible, one-stop entry point for languages bindings
228 * and protocol bindings.
230 * FIXME: Document this function further, in particular the possible
231 * values for rcode in the callback. In short, we map ACK_COMPLETE to
232 * RCODE_COMPLETE, internal errors set errno and set rcode to
233 * RCODE_SEND_ERROR (which is out of range for standard ieee1394
234 * rcodes). All other rcodes are forwarded unchanged. For all
235 * errors, payload is NULL, length is 0.
237 * Can not expect the callback to be called before the function
238 * returns, though this does happen in some cases (ACK_COMPLETE and
241 * The payload is only used for write requests and must not be freed
242 * until the callback has been called.
244 * @param card the card from which to send the request
245 * @param tcode the tcode for this transaction. Do not use
246 * TCODE_LOCK_REQUEST directly, instead use TCODE_LOCK_MASK_SWAP
247 * etc. to specify tcode and ext_tcode.
248 * @param node_id the destination node ID (bus ID and PHY ID concatenated)
249 * @param generation the generation for which node_id is valid
250 * @param speed the speed to use for sending the request
251 * @param offset the 48 bit offset on the destination node
252 * @param payload the data payload for the request subaction
253 * @param length the length in bytes of the data to read
254 * @param callback function to be called when the transaction is completed
255 * @param callback_data pointer to arbitrary data, which will be
256 * passed to the callback
258 * In case of asynchronous stream packets i.e. TCODE_STREAM_DATA, the caller
259 * needs to synthesize @destination_id with fw_stream_packet_destination_id().
261 void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode,
262 int destination_id, int generation, int speed,
263 unsigned long long offset, void *payload, size_t length,
264 fw_transaction_callback_t callback, void *callback_data)
270 * Bump the flush timer up 100ms first of all so we
271 * don't race with a flush timer callback.
274 mod_timer(&card->flush_timer, jiffies + DIV_ROUND_UP(HZ, 10));
277 * Allocate tlabel from the bitmap and put the transaction on
278 * the list while holding the card spinlock.
281 spin_lock_irqsave(&card->lock, flags);
283 tlabel = card->current_tlabel;
284 if (card->tlabel_mask & (1 << tlabel)) {
285 spin_unlock_irqrestore(&card->lock, flags);
286 callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data);
290 card->current_tlabel = (card->current_tlabel + 1) & 0x1f;
291 card->tlabel_mask |= (1 << tlabel);
293 t->node_id = destination_id;
295 t->callback = callback;
296 t->callback_data = callback_data;
298 fw_fill_request(&t->packet, tcode, t->tlabel,
299 destination_id, card->node_id, generation,
300 speed, offset, payload, length);
301 t->packet.callback = transmit_complete_callback;
303 list_add_tail(&t->link, &card->transaction_list);
305 spin_unlock_irqrestore(&card->lock, flags);
307 card->driver->send_request(card, &t->packet);
309 EXPORT_SYMBOL(fw_send_request);
311 struct transaction_callback_data {
312 struct completion done;
317 static void transaction_callback(struct fw_card *card, int rcode,
318 void *payload, size_t length, void *data)
320 struct transaction_callback_data *d = data;
322 if (rcode == RCODE_COMPLETE)
323 memcpy(d->payload, payload, length);
329 * fw_run_transaction - send request and sleep until transaction is completed
333 int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
334 int generation, int speed, unsigned long long offset,
335 void *payload, size_t length)
337 struct transaction_callback_data d;
338 struct fw_transaction t;
340 init_completion(&d.done);
342 fw_send_request(card, &t, tcode, destination_id, generation, speed,
343 offset, payload, length, transaction_callback, &d);
344 wait_for_completion(&d.done);
348 EXPORT_SYMBOL(fw_run_transaction);
350 static DEFINE_MUTEX(phy_config_mutex);
351 static DECLARE_COMPLETION(phy_config_done);
353 static void transmit_phy_packet_callback(struct fw_packet *packet,
354 struct fw_card *card, int status)
356 complete(&phy_config_done);
359 static struct fw_packet phy_config_packet = {
363 .callback = transmit_phy_packet_callback,
366 void fw_send_phy_config(struct fw_card *card,
367 int node_id, int generation, int gap_count)
369 long timeout = DIV_ROUND_UP(HZ, 10);
370 u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG) |
371 PHY_CONFIG_ROOT_ID(node_id) |
372 PHY_CONFIG_GAP_COUNT(gap_count);
374 mutex_lock(&phy_config_mutex);
376 phy_config_packet.header[0] = data;
377 phy_config_packet.header[1] = ~data;
378 phy_config_packet.generation = generation;
379 INIT_COMPLETION(phy_config_done);
381 card->driver->send_request(card, &phy_config_packet);
382 wait_for_completion_timeout(&phy_config_done, timeout);
384 mutex_unlock(&phy_config_mutex);
387 void fw_flush_transactions(struct fw_card *card)
389 struct fw_transaction *t, *next;
390 struct list_head list;
393 INIT_LIST_HEAD(&list);
394 spin_lock_irqsave(&card->lock, flags);
395 list_splice_init(&card->transaction_list, &list);
396 card->tlabel_mask = 0;
397 spin_unlock_irqrestore(&card->lock, flags);
399 list_for_each_entry_safe(t, next, &list, link) {
400 card->driver->cancel_packet(card, &t->packet);
403 * At this point cancel_packet will never call the
404 * transaction callback, since we just took all the
405 * transactions out of the list. So do it here.
407 t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data);
411 static struct fw_address_handler *lookup_overlapping_address_handler(
412 struct list_head *list, unsigned long long offset, size_t length)
414 struct fw_address_handler *handler;
416 list_for_each_entry(handler, list, link) {
417 if (handler->offset < offset + length &&
418 offset < handler->offset + handler->length)
425 static struct fw_address_handler *lookup_enclosing_address_handler(
426 struct list_head *list, unsigned long long offset, size_t length)
428 struct fw_address_handler *handler;
430 list_for_each_entry(handler, list, link) {
431 if (handler->offset <= offset &&
432 offset + length <= handler->offset + handler->length)
439 static DEFINE_SPINLOCK(address_handler_lock);
440 static LIST_HEAD(address_handler_list);
442 const struct fw_address_region fw_high_memory_region =
443 { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, };
444 EXPORT_SYMBOL(fw_high_memory_region);
447 const struct fw_address_region fw_low_memory_region =
448 { .start = 0x000000000000ULL, .end = 0x000100000000ULL, };
449 const struct fw_address_region fw_private_region =
450 { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, };
451 const struct fw_address_region fw_csr_region =
452 { .start = CSR_REGISTER_BASE,
453 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, };
454 const struct fw_address_region fw_unit_space_region =
455 { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, };
459 * fw_core_add_address_handler - register for incoming requests
461 * @region: region in the IEEE 1212 node space address range
463 * region->start, ->end, and handler->length have to be quadlet-aligned.
465 * When a request is received that falls within the specified address range,
466 * the specified callback is invoked. The parameters passed to the callback
467 * give the details of the particular request.
469 * Return value: 0 on success, non-zero otherwise.
470 * The start offset of the handler's address region is determined by
471 * fw_core_add_address_handler() and is returned in handler->offset.
473 int fw_core_add_address_handler(struct fw_address_handler *handler,
474 const struct fw_address_region *region)
476 struct fw_address_handler *other;
480 if (region->start & 0xffff000000000003ULL ||
481 region->end & 0xffff000000000003ULL ||
482 region->start >= region->end ||
483 handler->length & 3 ||
484 handler->length == 0)
487 spin_lock_irqsave(&address_handler_lock, flags);
489 handler->offset = region->start;
490 while (handler->offset + handler->length <= region->end) {
492 lookup_overlapping_address_handler(&address_handler_list,
496 handler->offset += other->length;
498 list_add_tail(&handler->link, &address_handler_list);
504 spin_unlock_irqrestore(&address_handler_lock, flags);
508 EXPORT_SYMBOL(fw_core_add_address_handler);
511 * fw_core_remove_address_handler - unregister an address handler
513 void fw_core_remove_address_handler(struct fw_address_handler *handler)
517 spin_lock_irqsave(&address_handler_lock, flags);
518 list_del(&handler->link);
519 spin_unlock_irqrestore(&address_handler_lock, flags);
521 EXPORT_SYMBOL(fw_core_remove_address_handler);
524 struct fw_packet response;
525 u32 request_header[4];
531 static void free_response_callback(struct fw_packet *packet,
532 struct fw_card *card, int status)
534 struct fw_request *request;
536 request = container_of(packet, struct fw_request, response);
540 void fw_fill_response(struct fw_packet *response, u32 *request_header,
541 int rcode, void *payload, size_t length)
543 int tcode, tlabel, extended_tcode, source, destination;
545 tcode = HEADER_GET_TCODE(request_header[0]);
546 tlabel = HEADER_GET_TLABEL(request_header[0]);
547 source = HEADER_GET_DESTINATION(request_header[0]);
548 destination = HEADER_GET_SOURCE(request_header[1]);
549 extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
551 response->header[0] =
552 HEADER_RETRY(RETRY_1) |
553 HEADER_TLABEL(tlabel) |
554 HEADER_DESTINATION(destination);
555 response->header[1] =
556 HEADER_SOURCE(source) |
558 response->header[2] = 0;
561 case TCODE_WRITE_QUADLET_REQUEST:
562 case TCODE_WRITE_BLOCK_REQUEST:
563 response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
564 response->header_length = 12;
565 response->payload_length = 0;
568 case TCODE_READ_QUADLET_REQUEST:
569 response->header[0] |=
570 HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
572 response->header[3] = *(u32 *)payload;
574 response->header[3] = 0;
575 response->header_length = 16;
576 response->payload_length = 0;
579 case TCODE_READ_BLOCK_REQUEST:
580 case TCODE_LOCK_REQUEST:
581 response->header[0] |= HEADER_TCODE(tcode + 2);
582 response->header[3] =
583 HEADER_DATA_LENGTH(length) |
584 HEADER_EXTENDED_TCODE(extended_tcode);
585 response->header_length = 16;
586 response->payload = payload;
587 response->payload_length = length;
595 response->payload_bus = 0;
597 EXPORT_SYMBOL(fw_fill_response);
599 static struct fw_request *allocate_request(struct fw_packet *p)
601 struct fw_request *request;
603 int request_tcode, t;
605 request_tcode = HEADER_GET_TCODE(p->header[0]);
606 switch (request_tcode) {
607 case TCODE_WRITE_QUADLET_REQUEST:
608 data = &p->header[3];
612 case TCODE_WRITE_BLOCK_REQUEST:
613 case TCODE_LOCK_REQUEST:
615 length = HEADER_GET_DATA_LENGTH(p->header[3]);
618 case TCODE_READ_QUADLET_REQUEST:
623 case TCODE_READ_BLOCK_REQUEST:
625 length = HEADER_GET_DATA_LENGTH(p->header[3]);
629 fw_error("ERROR - corrupt request received - %08x %08x %08x\n",
630 p->header[0], p->header[1], p->header[2]);
634 request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
638 t = (p->timestamp & 0x1fff) + 4000;
640 t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000;
642 t = (p->timestamp & ~0x1fff) + t;
644 request->response.speed = p->speed;
645 request->response.timestamp = t;
646 request->response.generation = p->generation;
647 request->response.ack = 0;
648 request->response.callback = free_response_callback;
649 request->ack = p->ack;
650 request->length = length;
652 memcpy(request->data, data, length);
654 memcpy(request->request_header, p->header, sizeof(p->header));
659 void fw_send_response(struct fw_card *card,
660 struct fw_request *request, int rcode)
662 /* unified transaction or broadcast transaction: don't respond */
663 if (request->ack != ACK_PENDING ||
664 HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) {
669 if (rcode == RCODE_COMPLETE)
670 fw_fill_response(&request->response, request->request_header,
671 rcode, request->data, request->length);
673 fw_fill_response(&request->response, request->request_header,
676 card->driver->send_response(card, &request->response);
678 EXPORT_SYMBOL(fw_send_response);
680 void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
682 struct fw_address_handler *handler;
683 struct fw_request *request;
684 unsigned long long offset;
686 int tcode, destination, source;
688 if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
691 request = allocate_request(p);
692 if (request == NULL) {
693 /* FIXME: send statically allocated busy packet. */
698 ((unsigned long long)
699 HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2];
700 tcode = HEADER_GET_TCODE(p->header[0]);
701 destination = HEADER_GET_DESTINATION(p->header[0]);
702 source = HEADER_GET_SOURCE(p->header[1]);
704 spin_lock_irqsave(&address_handler_lock, flags);
705 handler = lookup_enclosing_address_handler(&address_handler_list,
706 offset, request->length);
707 spin_unlock_irqrestore(&address_handler_lock, flags);
710 * FIXME: lookup the fw_node corresponding to the sender of
711 * this request and pass that to the address handler instead
712 * of the node ID. We may also want to move the address
713 * allocations to fw_node so we only do this callback if the
714 * upper layers registered it for this node.
718 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
720 handler->address_callback(card, request,
721 tcode, destination, source,
722 p->generation, p->speed, offset,
723 request->data, request->length,
724 handler->callback_data);
726 EXPORT_SYMBOL(fw_core_handle_request);
728 void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
730 struct fw_transaction *t;
734 int tcode, tlabel, destination, source, rcode;
736 tcode = HEADER_GET_TCODE(p->header[0]);
737 tlabel = HEADER_GET_TLABEL(p->header[0]);
738 destination = HEADER_GET_DESTINATION(p->header[0]);
739 source = HEADER_GET_SOURCE(p->header[1]);
740 rcode = HEADER_GET_RCODE(p->header[1]);
742 spin_lock_irqsave(&card->lock, flags);
743 list_for_each_entry(t, &card->transaction_list, link) {
744 if (t->node_id == source && t->tlabel == tlabel) {
746 card->tlabel_mask &= ~(1 << t->tlabel);
750 spin_unlock_irqrestore(&card->lock, flags);
752 if (&t->link == &card->transaction_list) {
753 fw_notify("Unsolicited response (source %x, tlabel %x)\n",
759 * FIXME: sanity check packet, is length correct, does tcodes
760 * and addresses match.
764 case TCODE_READ_QUADLET_RESPONSE:
765 data = (u32 *) &p->header[3];
769 case TCODE_WRITE_RESPONSE:
774 case TCODE_READ_BLOCK_RESPONSE:
775 case TCODE_LOCK_RESPONSE:
777 data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
781 /* Should never happen, this is just to shut up gcc. */
788 * The response handler may be executed while the request handler
789 * is still pending. Cancel the request handler.
791 card->driver->cancel_packet(card, &t->packet);
793 t->callback(card, rcode, data, data_length, t->callback_data);
795 EXPORT_SYMBOL(fw_core_handle_response);
797 static const struct fw_address_region topology_map_region =
798 { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP,
799 .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, };
801 static void handle_topology_map(struct fw_card *card, struct fw_request *request,
802 int tcode, int destination, int source, int generation,
803 int speed, unsigned long long offset,
804 void *payload, size_t length, void *callback_data)
809 if (!TCODE_IS_READ_REQUEST(tcode)) {
810 fw_send_response(card, request, RCODE_TYPE_ERROR);
814 if ((offset & 3) > 0 || (length & 3) > 0) {
815 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
819 start = (offset - topology_map_region.start) / 4;
820 end = start + length / 4;
823 for (i = 0; i < length / 4; i++)
824 map[i] = cpu_to_be32(card->topology_map[start + i]);
826 fw_send_response(card, request, RCODE_COMPLETE);
829 static struct fw_address_handler topology_map = {
831 .address_callback = handle_topology_map,
834 static const struct fw_address_region registers_region =
835 { .start = CSR_REGISTER_BASE,
836 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, };
838 static void handle_registers(struct fw_card *card, struct fw_request *request,
839 int tcode, int destination, int source, int generation,
840 int speed, unsigned long long offset,
841 void *payload, size_t length, void *callback_data)
843 int reg = offset & ~CSR_REGISTER_BASE;
844 unsigned long long bus_time;
845 __be32 *data = payload;
846 int rcode = RCODE_COMPLETE;
851 if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
852 rcode = RCODE_TYPE_ERROR;
856 bus_time = card->driver->get_bus_time(card);
857 if (reg == CSR_CYCLE_TIME)
858 *data = cpu_to_be32(bus_time);
860 *data = cpu_to_be32(bus_time >> 25);
863 case CSR_BROADCAST_CHANNEL:
864 if (tcode == TCODE_READ_QUADLET_REQUEST)
865 *data = cpu_to_be32(card->broadcast_channel);
866 else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
867 card->broadcast_channel =
868 (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) |
869 BROADCAST_CHANNEL_INITIAL;
871 rcode = RCODE_TYPE_ERROR;
874 case CSR_BUS_MANAGER_ID:
875 case CSR_BANDWIDTH_AVAILABLE:
876 case CSR_CHANNELS_AVAILABLE_HI:
877 case CSR_CHANNELS_AVAILABLE_LO:
879 * FIXME: these are handled by the OHCI hardware and
880 * the stack never sees these request. If we add
881 * support for a new type of controller that doesn't
882 * handle this in hardware we need to deal with these
888 case CSR_BUSY_TIMEOUT:
889 /* FIXME: Implement this. */
892 rcode = RCODE_ADDRESS_ERROR;
896 fw_send_response(card, request, rcode);
899 static struct fw_address_handler registers = {
901 .address_callback = handle_registers,
904 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
905 MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
906 MODULE_LICENSE("GPL");
908 static const u32 vendor_textual_descriptor[] = {
909 /* textual descriptor leaf () */
913 0x4c696e75, /* L i n u */
914 0x78204669, /* x F i */
915 0x72657769, /* r e w i */
916 0x72650000, /* r e */
919 static const u32 model_textual_descriptor[] = {
920 /* model descriptor leaf () */
924 0x4a756a75, /* J u j u */
927 static struct fw_descriptor vendor_id_descriptor = {
928 .length = ARRAY_SIZE(vendor_textual_descriptor),
929 .immediate = 0x03d00d1e,
931 .data = vendor_textual_descriptor,
934 static struct fw_descriptor model_id_descriptor = {
935 .length = ARRAY_SIZE(model_textual_descriptor),
936 .immediate = 0x17000001,
938 .data = model_textual_descriptor,
941 static int __init fw_core_init(void)
945 ret = bus_register(&fw_bus_type);
949 fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
950 if (fw_cdev_major < 0) {
951 bus_unregister(&fw_bus_type);
952 return fw_cdev_major;
955 fw_core_add_address_handler(&topology_map, &topology_map_region);
956 fw_core_add_address_handler(®isters, ®isters_region);
957 fw_core_add_descriptor(&vendor_id_descriptor);
958 fw_core_add_descriptor(&model_id_descriptor);
963 static void __exit fw_core_cleanup(void)
965 unregister_chrdev(fw_cdev_major, "firewire");
966 bus_unregister(&fw_bus_type);
967 idr_destroy(&fw_device_idr);
970 module_init(fw_core_init);
971 module_exit(fw_core_cleanup);