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 * Deallocate a range of addresses allocated with fw_allocate. This
506 * will call the associated callback one last time with a the special
507 * tcode TCODE_DEALLOCATE, to let the client destroy the registered
508 * callback data. For convenience, the callback parameters offset and
509 * length are set to the start and the length respectively for the
510 * deallocated region, payload is set to NULL.
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];
531 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);
541 fw_fill_response(struct fw_packet *response, u32 *request_header,
542 int rcode, void *payload, size_t length)
544 int tcode, tlabel, extended_tcode, source, destination;
546 tcode = HEADER_GET_TCODE(request_header[0]);
547 tlabel = HEADER_GET_TLABEL(request_header[0]);
548 source = HEADER_GET_DESTINATION(request_header[0]);
549 destination = HEADER_GET_SOURCE(request_header[1]);
550 extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
552 response->header[0] =
553 HEADER_RETRY(RETRY_1) |
554 HEADER_TLABEL(tlabel) |
555 HEADER_DESTINATION(destination);
556 response->header[1] =
557 HEADER_SOURCE(source) |
559 response->header[2] = 0;
562 case TCODE_WRITE_QUADLET_REQUEST:
563 case TCODE_WRITE_BLOCK_REQUEST:
564 response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
565 response->header_length = 12;
566 response->payload_length = 0;
569 case TCODE_READ_QUADLET_REQUEST:
570 response->header[0] |=
571 HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
573 response->header[3] = *(u32 *)payload;
575 response->header[3] = 0;
576 response->header_length = 16;
577 response->payload_length = 0;
580 case TCODE_READ_BLOCK_REQUEST:
581 case TCODE_LOCK_REQUEST:
582 response->header[0] |= HEADER_TCODE(tcode + 2);
583 response->header[3] =
584 HEADER_DATA_LENGTH(length) |
585 HEADER_EXTENDED_TCODE(extended_tcode);
586 response->header_length = 16;
587 response->payload = payload;
588 response->payload_length = length;
596 response->payload_bus = 0;
598 EXPORT_SYMBOL(fw_fill_response);
600 static struct fw_request *
601 allocate_request(struct fw_packet *p)
603 struct fw_request *request;
605 int request_tcode, t;
607 request_tcode = HEADER_GET_TCODE(p->header[0]);
608 switch (request_tcode) {
609 case TCODE_WRITE_QUADLET_REQUEST:
610 data = &p->header[3];
614 case TCODE_WRITE_BLOCK_REQUEST:
615 case TCODE_LOCK_REQUEST:
617 length = HEADER_GET_DATA_LENGTH(p->header[3]);
620 case TCODE_READ_QUADLET_REQUEST:
625 case TCODE_READ_BLOCK_REQUEST:
627 length = HEADER_GET_DATA_LENGTH(p->header[3]);
631 fw_error("ERROR - corrupt request received - %08x %08x %08x\n",
632 p->header[0], p->header[1], p->header[2]);
636 request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
640 t = (p->timestamp & 0x1fff) + 4000;
642 t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000;
644 t = (p->timestamp & ~0x1fff) + t;
646 request->response.speed = p->speed;
647 request->response.timestamp = t;
648 request->response.generation = p->generation;
649 request->response.ack = 0;
650 request->response.callback = free_response_callback;
651 request->ack = p->ack;
652 request->length = length;
654 memcpy(request->data, data, length);
656 memcpy(request->request_header, p->header, sizeof(p->header));
662 fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
664 /* unified transaction or broadcast transaction: don't respond */
665 if (request->ack != ACK_PENDING ||
666 HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) {
671 if (rcode == RCODE_COMPLETE)
672 fw_fill_response(&request->response, request->request_header,
673 rcode, request->data, request->length);
675 fw_fill_response(&request->response, request->request_header,
678 card->driver->send_response(card, &request->response);
680 EXPORT_SYMBOL(fw_send_response);
683 fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
685 struct fw_address_handler *handler;
686 struct fw_request *request;
687 unsigned long long offset;
689 int tcode, destination, source;
691 if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
694 request = allocate_request(p);
695 if (request == NULL) {
696 /* FIXME: send statically allocated busy packet. */
701 ((unsigned long long)
702 HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2];
703 tcode = HEADER_GET_TCODE(p->header[0]);
704 destination = HEADER_GET_DESTINATION(p->header[0]);
705 source = HEADER_GET_SOURCE(p->header[1]);
707 spin_lock_irqsave(&address_handler_lock, flags);
708 handler = lookup_enclosing_address_handler(&address_handler_list,
709 offset, request->length);
710 spin_unlock_irqrestore(&address_handler_lock, flags);
713 * FIXME: lookup the fw_node corresponding to the sender of
714 * this request and pass that to the address handler instead
715 * of the node ID. We may also want to move the address
716 * allocations to fw_node so we only do this callback if the
717 * upper layers registered it for this node.
721 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
723 handler->address_callback(card, request,
724 tcode, destination, source,
725 p->generation, p->speed, offset,
726 request->data, request->length,
727 handler->callback_data);
729 EXPORT_SYMBOL(fw_core_handle_request);
732 fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
734 struct fw_transaction *t;
738 int tcode, tlabel, destination, source, rcode;
740 tcode = HEADER_GET_TCODE(p->header[0]);
741 tlabel = HEADER_GET_TLABEL(p->header[0]);
742 destination = HEADER_GET_DESTINATION(p->header[0]);
743 source = HEADER_GET_SOURCE(p->header[1]);
744 rcode = HEADER_GET_RCODE(p->header[1]);
746 spin_lock_irqsave(&card->lock, flags);
747 list_for_each_entry(t, &card->transaction_list, link) {
748 if (t->node_id == source && t->tlabel == tlabel) {
750 card->tlabel_mask &= ~(1 << t->tlabel);
754 spin_unlock_irqrestore(&card->lock, flags);
756 if (&t->link == &card->transaction_list) {
757 fw_notify("Unsolicited response (source %x, tlabel %x)\n",
763 * FIXME: sanity check packet, is length correct, does tcodes
764 * and addresses match.
768 case TCODE_READ_QUADLET_RESPONSE:
769 data = (u32 *) &p->header[3];
773 case TCODE_WRITE_RESPONSE:
778 case TCODE_READ_BLOCK_RESPONSE:
779 case TCODE_LOCK_RESPONSE:
781 data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
785 /* Should never happen, this is just to shut up gcc. */
792 * The response handler may be executed while the request handler
793 * is still pending. Cancel the request handler.
795 card->driver->cancel_packet(card, &t->packet);
797 t->callback(card, rcode, data, data_length, t->callback_data);
799 EXPORT_SYMBOL(fw_core_handle_response);
801 static const struct fw_address_region topology_map_region =
802 { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP,
803 .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, };
806 handle_topology_map(struct fw_card *card, struct fw_request *request,
807 int tcode, int destination, int source,
808 int generation, int speed,
809 unsigned long long offset,
810 void *payload, size_t length, void *callback_data)
815 if (!TCODE_IS_READ_REQUEST(tcode)) {
816 fw_send_response(card, request, RCODE_TYPE_ERROR);
820 if ((offset & 3) > 0 || (length & 3) > 0) {
821 fw_send_response(card, request, RCODE_ADDRESS_ERROR);
825 start = (offset - topology_map_region.start) / 4;
826 end = start + length / 4;
829 for (i = 0; i < length / 4; i++)
830 map[i] = cpu_to_be32(card->topology_map[start + i]);
832 fw_send_response(card, request, RCODE_COMPLETE);
835 static struct fw_address_handler topology_map = {
837 .address_callback = handle_topology_map,
840 static const struct fw_address_region registers_region =
841 { .start = CSR_REGISTER_BASE,
842 .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, };
845 handle_registers(struct fw_card *card, struct fw_request *request,
846 int tcode, int destination, int source,
847 int generation, int speed,
848 unsigned long long offset,
849 void *payload, size_t length, void *callback_data)
851 int reg = offset & ~CSR_REGISTER_BASE;
852 unsigned long long bus_time;
853 __be32 *data = payload;
854 int rcode = RCODE_COMPLETE;
859 if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
860 rcode = RCODE_TYPE_ERROR;
864 bus_time = card->driver->get_bus_time(card);
865 if (reg == CSR_CYCLE_TIME)
866 *data = cpu_to_be32(bus_time);
868 *data = cpu_to_be32(bus_time >> 25);
871 case CSR_BROADCAST_CHANNEL:
872 if (tcode == TCODE_READ_QUADLET_REQUEST)
873 *data = cpu_to_be32(card->broadcast_channel);
874 else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
875 card->broadcast_channel =
876 (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) |
877 BROADCAST_CHANNEL_INITIAL;
879 rcode = RCODE_TYPE_ERROR;
882 case CSR_BUS_MANAGER_ID:
883 case CSR_BANDWIDTH_AVAILABLE:
884 case CSR_CHANNELS_AVAILABLE_HI:
885 case CSR_CHANNELS_AVAILABLE_LO:
887 * FIXME: these are handled by the OHCI hardware and
888 * the stack never sees these request. If we add
889 * support for a new type of controller that doesn't
890 * handle this in hardware we need to deal with these
896 case CSR_BUSY_TIMEOUT:
897 /* FIXME: Implement this. */
900 rcode = RCODE_ADDRESS_ERROR;
904 fw_send_response(card, request, rcode);
907 static struct fw_address_handler registers = {
909 .address_callback = handle_registers,
912 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
913 MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
914 MODULE_LICENSE("GPL");
916 static const u32 vendor_textual_descriptor[] = {
917 /* textual descriptor leaf () */
921 0x4c696e75, /* L i n u */
922 0x78204669, /* x F i */
923 0x72657769, /* r e w i */
924 0x72650000, /* r e */
927 static const u32 model_textual_descriptor[] = {
928 /* model descriptor leaf () */
932 0x4a756a75, /* J u j u */
935 static struct fw_descriptor vendor_id_descriptor = {
936 .length = ARRAY_SIZE(vendor_textual_descriptor),
937 .immediate = 0x03d00d1e,
939 .data = vendor_textual_descriptor,
942 static struct fw_descriptor model_id_descriptor = {
943 .length = ARRAY_SIZE(model_textual_descriptor),
944 .immediate = 0x17000001,
946 .data = model_textual_descriptor,
949 static int __init fw_core_init(void)
953 retval = bus_register(&fw_bus_type);
957 fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
958 if (fw_cdev_major < 0) {
959 bus_unregister(&fw_bus_type);
960 return fw_cdev_major;
963 retval = fw_core_add_address_handler(&topology_map,
964 &topology_map_region);
967 retval = fw_core_add_address_handler(®isters,
971 /* Add the vendor textual descriptor. */
972 retval = fw_core_add_descriptor(&vendor_id_descriptor);
974 retval = fw_core_add_descriptor(&model_id_descriptor);
980 static void __exit fw_core_cleanup(void)
982 unregister_chrdev(fw_cdev_major, "firewire");
983 bus_unregister(&fw_bus_type);
984 idr_destroy(&fw_device_idr);
987 module_init(fw_core_init);
988 module_exit(fw_core_cleanup);