Commit | Line | Data |
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c781c06d KH |
1 | /* |
2 | * Core IEEE1394 transaction logic | |
3038e353 KH |
3 | * |
4 | * Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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. | |
19 | */ | |
20 | ||
e8ca9702 | 21 | #include <linux/bug.h> |
2a0a2590 | 22 | #include <linux/completion.h> |
e8ca9702 SR |
23 | #include <linux/device.h> |
24 | #include <linux/errno.h> | |
77c9a5da | 25 | #include <linux/firewire.h> |
e8ca9702 SR |
26 | #include <linux/firewire-constants.h> |
27 | #include <linux/fs.h> | |
28 | #include <linux/init.h> | |
d6053e08 | 29 | #include <linux/idr.h> |
e8ca9702 | 30 | #include <linux/jiffies.h> |
3038e353 | 31 | #include <linux/kernel.h> |
3038e353 | 32 | #include <linux/list.h> |
e8ca9702 SR |
33 | #include <linux/module.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/spinlock.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/timer.h> | |
38 | #include <linux/types.h> | |
39 | ||
40 | #include <asm/byteorder.h> | |
3038e353 | 41 | |
77c9a5da | 42 | #include "core.h" |
3038e353 | 43 | |
a77754a7 KH |
44 | #define HEADER_PRI(pri) ((pri) << 0) |
45 | #define HEADER_TCODE(tcode) ((tcode) << 4) | |
46 | #define HEADER_RETRY(retry) ((retry) << 8) | |
47 | #define HEADER_TLABEL(tlabel) ((tlabel) << 10) | |
48 | #define HEADER_DESTINATION(destination) ((destination) << 16) | |
49 | #define HEADER_SOURCE(source) ((source) << 16) | |
50 | #define HEADER_RCODE(rcode) ((rcode) << 12) | |
51 | #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0) | |
52 | #define HEADER_DATA_LENGTH(length) ((length) << 16) | |
53 | #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0) | |
54 | ||
55 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) | |
56 | #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f) | |
57 | #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f) | |
58 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) | |
59 | #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff) | |
60 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) | |
61 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) | |
62 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) | |
63 | ||
a7ea6782 SR |
64 | #define HEADER_DESTINATION_IS_BROADCAST(q) \ |
65 | (((q) & HEADER_DESTINATION(0x3f)) == HEADER_DESTINATION(0x3f)) | |
66 | ||
77c9a5da SR |
67 | #define PHY_PACKET_CONFIG 0x0 |
68 | #define PHY_PACKET_LINK_ON 0x1 | |
69 | #define PHY_PACKET_SELF_ID 0x2 | |
70 | ||
a77754a7 KH |
71 | #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22)) |
72 | #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23)) | |
73 | #define PHY_IDENTIFIER(id) ((id) << 30) | |
3038e353 | 74 | |
53dca511 | 75 | static int close_transaction(struct fw_transaction *transaction, |
a38a00fd | 76 | struct fw_card *card, int rcode) |
3038e353 | 77 | { |
730c32f5 | 78 | struct fw_transaction *t; |
3038e353 KH |
79 | unsigned long flags; |
80 | ||
81 | spin_lock_irqsave(&card->lock, flags); | |
730c32f5 KH |
82 | list_for_each_entry(t, &card->transaction_list, link) { |
83 | if (t == transaction) { | |
5c40cbfe | 84 | list_del_init(&t->link); |
1e626fdc | 85 | card->tlabel_mask &= ~(1ULL << t->tlabel); |
730c32f5 KH |
86 | break; |
87 | } | |
88 | } | |
3038e353 KH |
89 | spin_unlock_irqrestore(&card->lock, flags); |
90 | ||
730c32f5 | 91 | if (&t->link != &card->transaction_list) { |
5c40cbfe | 92 | del_timer_sync(&t->split_timeout_timer); |
a38a00fd | 93 | t->callback(card, rcode, NULL, 0, t->callback_data); |
730c32f5 KH |
94 | return 0; |
95 | } | |
96 | ||
97 | return -ENOENT; | |
3038e353 KH |
98 | } |
99 | ||
c781c06d KH |
100 | /* |
101 | * Only valid for transactions that are potentially pending (ie have | |
102 | * been sent). | |
103 | */ | |
53dca511 SR |
104 | int fw_cancel_transaction(struct fw_card *card, |
105 | struct fw_transaction *transaction) | |
730c32f5 | 106 | { |
c781c06d KH |
107 | /* |
108 | * Cancel the packet transmission if it's still queued. That | |
730c32f5 | 109 | * will call the packet transmission callback which cancels |
c781c06d KH |
110 | * the transaction. |
111 | */ | |
730c32f5 KH |
112 | |
113 | if (card->driver->cancel_packet(card, &transaction->packet) == 0) | |
114 | return 0; | |
115 | ||
c781c06d KH |
116 | /* |
117 | * If the request packet has already been sent, we need to see | |
118 | * if the transaction is still pending and remove it in that case. | |
119 | */ | |
730c32f5 | 120 | |
a38a00fd | 121 | return close_transaction(transaction, card, RCODE_CANCELLED); |
730c32f5 KH |
122 | } |
123 | EXPORT_SYMBOL(fw_cancel_transaction); | |
124 | ||
5c40cbfe CL |
125 | static void split_transaction_timeout_callback(unsigned long data) |
126 | { | |
127 | struct fw_transaction *t = (struct fw_transaction *)data; | |
128 | struct fw_card *card = t->card; | |
129 | unsigned long flags; | |
130 | ||
131 | spin_lock_irqsave(&card->lock, flags); | |
132 | if (list_empty(&t->link)) { | |
133 | spin_unlock_irqrestore(&card->lock, flags); | |
134 | return; | |
135 | } | |
136 | list_del(&t->link); | |
137 | card->tlabel_mask &= ~(1ULL << t->tlabel); | |
138 | spin_unlock_irqrestore(&card->lock, flags); | |
139 | ||
140 | card->driver->cancel_packet(card, &t->packet); | |
141 | ||
142 | /* | |
143 | * At this point cancel_packet will never call the transaction | |
144 | * callback, since we just took the transaction out of the list. | |
145 | * So do it here. | |
146 | */ | |
147 | t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data); | |
148 | } | |
149 | ||
53dca511 SR |
150 | static void transmit_complete_callback(struct fw_packet *packet, |
151 | struct fw_card *card, int status) | |
3038e353 KH |
152 | { |
153 | struct fw_transaction *t = | |
154 | container_of(packet, struct fw_transaction, packet); | |
155 | ||
156 | switch (status) { | |
157 | case ACK_COMPLETE: | |
a38a00fd | 158 | close_transaction(t, card, RCODE_COMPLETE); |
3038e353 KH |
159 | break; |
160 | case ACK_PENDING: | |
161 | t->timestamp = packet->timestamp; | |
162 | break; | |
163 | case ACK_BUSY_X: | |
164 | case ACK_BUSY_A: | |
165 | case ACK_BUSY_B: | |
a38a00fd | 166 | close_transaction(t, card, RCODE_BUSY); |
3038e353 KH |
167 | break; |
168 | case ACK_DATA_ERROR: | |
a38a00fd | 169 | close_transaction(t, card, RCODE_DATA_ERROR); |
e5f49c3b | 170 | break; |
3038e353 | 171 | case ACK_TYPE_ERROR: |
a38a00fd | 172 | close_transaction(t, card, RCODE_TYPE_ERROR); |
3038e353 KH |
173 | break; |
174 | default: | |
c781c06d KH |
175 | /* |
176 | * In this case the ack is really a juju specific | |
177 | * rcode, so just forward that to the callback. | |
178 | */ | |
a38a00fd | 179 | close_transaction(t, card, status); |
3038e353 KH |
180 | break; |
181 | } | |
182 | } | |
183 | ||
53dca511 | 184 | static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel, |
b9549bc6 | 185 | int destination_id, int source_id, int generation, int speed, |
36bfe49d | 186 | unsigned long long offset, void *payload, size_t length) |
3038e353 KH |
187 | { |
188 | int ext_tcode; | |
189 | ||
18e9b10f SR |
190 | if (tcode == TCODE_STREAM_DATA) { |
191 | packet->header[0] = | |
192 | HEADER_DATA_LENGTH(length) | | |
193 | destination_id | | |
194 | HEADER_TCODE(TCODE_STREAM_DATA); | |
195 | packet->header_length = 4; | |
196 | packet->payload = payload; | |
197 | packet->payload_length = length; | |
198 | ||
199 | goto common; | |
200 | } | |
201 | ||
3038e353 | 202 | if (tcode > 0x10) { |
8f9f963e | 203 | ext_tcode = tcode & ~0x10; |
3038e353 KH |
204 | tcode = TCODE_LOCK_REQUEST; |
205 | } else | |
206 | ext_tcode = 0; | |
207 | ||
208 | packet->header[0] = | |
a77754a7 KH |
209 | HEADER_RETRY(RETRY_X) | |
210 | HEADER_TLABEL(tlabel) | | |
211 | HEADER_TCODE(tcode) | | |
b9549bc6 | 212 | HEADER_DESTINATION(destination_id); |
3038e353 | 213 | packet->header[1] = |
a77754a7 | 214 | HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id); |
3038e353 KH |
215 | packet->header[2] = |
216 | offset; | |
217 | ||
218 | switch (tcode) { | |
219 | case TCODE_WRITE_QUADLET_REQUEST: | |
220 | packet->header[3] = *(u32 *)payload; | |
221 | packet->header_length = 16; | |
222 | packet->payload_length = 0; | |
223 | break; | |
224 | ||
225 | case TCODE_LOCK_REQUEST: | |
226 | case TCODE_WRITE_BLOCK_REQUEST: | |
227 | packet->header[3] = | |
a77754a7 KH |
228 | HEADER_DATA_LENGTH(length) | |
229 | HEADER_EXTENDED_TCODE(ext_tcode); | |
3038e353 KH |
230 | packet->header_length = 16; |
231 | packet->payload = payload; | |
232 | packet->payload_length = length; | |
233 | break; | |
234 | ||
235 | case TCODE_READ_QUADLET_REQUEST: | |
236 | packet->header_length = 12; | |
237 | packet->payload_length = 0; | |
238 | break; | |
239 | ||
240 | case TCODE_READ_BLOCK_REQUEST: | |
241 | packet->header[3] = | |
a77754a7 KH |
242 | HEADER_DATA_LENGTH(length) | |
243 | HEADER_EXTENDED_TCODE(ext_tcode); | |
3038e353 KH |
244 | packet->header_length = 16; |
245 | packet->payload_length = 0; | |
246 | break; | |
5b189bf3 SR |
247 | |
248 | default: | |
f9c70f91 | 249 | WARN(1, "wrong tcode %d", tcode); |
3038e353 | 250 | } |
18e9b10f | 251 | common: |
3038e353 KH |
252 | packet->speed = speed; |
253 | packet->generation = generation; | |
730c32f5 | 254 | packet->ack = 0; |
19593ffd | 255 | packet->payload_mapped = false; |
3038e353 KH |
256 | } |
257 | ||
7906054f CL |
258 | static int allocate_tlabel(struct fw_card *card) |
259 | { | |
260 | int tlabel; | |
261 | ||
262 | tlabel = card->current_tlabel; | |
263 | while (card->tlabel_mask & (1ULL << tlabel)) { | |
264 | tlabel = (tlabel + 1) & 0x3f; | |
265 | if (tlabel == card->current_tlabel) | |
266 | return -EBUSY; | |
267 | } | |
268 | ||
269 | card->current_tlabel = (tlabel + 1) & 0x3f; | |
270 | card->tlabel_mask |= 1ULL << tlabel; | |
271 | ||
272 | return tlabel; | |
273 | } | |
274 | ||
3038e353 KH |
275 | /** |
276 | * This function provides low-level access to the IEEE1394 transaction | |
277 | * logic. Most C programs would use either fw_read(), fw_write() or | |
278 | * fw_lock() instead - those function are convenience wrappers for | |
279 | * this function. The fw_send_request() function is primarily | |
280 | * provided as a flexible, one-stop entry point for languages bindings | |
281 | * and protocol bindings. | |
282 | * | |
283 | * FIXME: Document this function further, in particular the possible | |
284 | * values for rcode in the callback. In short, we map ACK_COMPLETE to | |
285 | * RCODE_COMPLETE, internal errors set errno and set rcode to | |
286 | * RCODE_SEND_ERROR (which is out of range for standard ieee1394 | |
287 | * rcodes). All other rcodes are forwarded unchanged. For all | |
288 | * errors, payload is NULL, length is 0. | |
289 | * | |
290 | * Can not expect the callback to be called before the function | |
291 | * returns, though this does happen in some cases (ACK_COMPLETE and | |
292 | * errors). | |
293 | * | |
294 | * The payload is only used for write requests and must not be freed | |
295 | * until the callback has been called. | |
296 | * | |
297 | * @param card the card from which to send the request | |
298 | * @param tcode the tcode for this transaction. Do not use | |
dbe7f76d | 299 | * TCODE_LOCK_REQUEST directly, instead use TCODE_LOCK_MASK_SWAP |
3038e353 | 300 | * etc. to specify tcode and ext_tcode. |
907293d7 | 301 | * @param node_id the destination node ID (bus ID and PHY ID concatenated) |
3038e353 KH |
302 | * @param generation the generation for which node_id is valid |
303 | * @param speed the speed to use for sending the request | |
304 | * @param offset the 48 bit offset on the destination node | |
305 | * @param payload the data payload for the request subaction | |
306 | * @param length the length in bytes of the data to read | |
307 | * @param callback function to be called when the transaction is completed | |
308 | * @param callback_data pointer to arbitrary data, which will be | |
309 | * passed to the callback | |
18e9b10f SR |
310 | * |
311 | * In case of asynchronous stream packets i.e. TCODE_STREAM_DATA, the caller | |
312 | * needs to synthesize @destination_id with fw_stream_packet_destination_id(). | |
3038e353 | 313 | */ |
53dca511 SR |
314 | void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, |
315 | int destination_id, int generation, int speed, | |
316 | unsigned long long offset, void *payload, size_t length, | |
317 | fw_transaction_callback_t callback, void *callback_data) | |
3038e353 KH |
318 | { |
319 | unsigned long flags; | |
b9549bc6 | 320 | int tlabel; |
3038e353 | 321 | |
c781c06d KH |
322 | /* |
323 | * Allocate tlabel from the bitmap and put the transaction on | |
324 | * the list while holding the card spinlock. | |
325 | */ | |
3038e353 KH |
326 | |
327 | spin_lock_irqsave(&card->lock, flags); | |
328 | ||
7906054f CL |
329 | tlabel = allocate_tlabel(card); |
330 | if (tlabel < 0) { | |
3038e353 KH |
331 | spin_unlock_irqrestore(&card->lock, flags); |
332 | callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data); | |
333 | return; | |
334 | } | |
335 | ||
1e119fa9 | 336 | t->node_id = destination_id; |
3038e353 | 337 | t->tlabel = tlabel; |
5c40cbfe CL |
338 | t->card = card; |
339 | setup_timer(&t->split_timeout_timer, | |
340 | split_transaction_timeout_callback, (unsigned long)t); | |
341 | /* FIXME: start this timer later, relative to t->timestamp */ | |
342 | mod_timer(&t->split_timeout_timer, jiffies + DIV_ROUND_UP(HZ, 10)); | |
3038e353 KH |
343 | t->callback = callback; |
344 | t->callback_data = callback_data; | |
345 | ||
1e119fa9 JF |
346 | fw_fill_request(&t->packet, tcode, t->tlabel, |
347 | destination_id, card->node_id, generation, | |
348 | speed, offset, payload, length); | |
3038e353 KH |
349 | t->packet.callback = transmit_complete_callback; |
350 | ||
e9aeb46c SR |
351 | list_add_tail(&t->link, &card->transaction_list); |
352 | ||
353 | spin_unlock_irqrestore(&card->lock, flags); | |
354 | ||
3038e353 KH |
355 | card->driver->send_request(card, &t->packet); |
356 | } | |
357 | EXPORT_SYMBOL(fw_send_request); | |
358 | ||
1e119fa9 JF |
359 | struct transaction_callback_data { |
360 | struct completion done; | |
361 | void *payload; | |
362 | int rcode; | |
363 | }; | |
364 | ||
365 | static void transaction_callback(struct fw_card *card, int rcode, | |
366 | void *payload, size_t length, void *data) | |
367 | { | |
368 | struct transaction_callback_data *d = data; | |
369 | ||
370 | if (rcode == RCODE_COMPLETE) | |
371 | memcpy(d->payload, payload, length); | |
372 | d->rcode = rcode; | |
373 | complete(&d->done); | |
374 | } | |
375 | ||
376 | /** | |
377 | * fw_run_transaction - send request and sleep until transaction is completed | |
378 | * | |
379 | * Returns the RCODE. | |
380 | */ | |
381 | int fw_run_transaction(struct fw_card *card, int tcode, int destination_id, | |
53dca511 | 382 | int generation, int speed, unsigned long long offset, |
ba27e1f7 | 383 | void *payload, size_t length) |
1e119fa9 JF |
384 | { |
385 | struct transaction_callback_data d; | |
386 | struct fw_transaction t; | |
387 | ||
5c40cbfe | 388 | init_timer_on_stack(&t.split_timeout_timer); |
1e119fa9 | 389 | init_completion(&d.done); |
ba27e1f7 | 390 | d.payload = payload; |
1e119fa9 | 391 | fw_send_request(card, &t, tcode, destination_id, generation, speed, |
ba27e1f7 | 392 | offset, payload, length, transaction_callback, &d); |
1e119fa9 | 393 | wait_for_completion(&d.done); |
5c40cbfe | 394 | destroy_timer_on_stack(&t.split_timeout_timer); |
1e119fa9 JF |
395 | |
396 | return d.rcode; | |
397 | } | |
398 | EXPORT_SYMBOL(fw_run_transaction); | |
399 | ||
c0220d68 SR |
400 | static DEFINE_MUTEX(phy_config_mutex); |
401 | static DECLARE_COMPLETION(phy_config_done); | |
ae1e5355 SR |
402 | |
403 | static void transmit_phy_packet_callback(struct fw_packet *packet, | |
404 | struct fw_card *card, int status) | |
3038e353 | 405 | { |
c0220d68 | 406 | complete(&phy_config_done); |
3038e353 KH |
407 | } |
408 | ||
c0220d68 SR |
409 | static struct fw_packet phy_config_packet = { |
410 | .header_length = 8, | |
411 | .payload_length = 0, | |
412 | .speed = SCODE_100, | |
413 | .callback = transmit_phy_packet_callback, | |
414 | }; | |
415 | ||
83db801c KH |
416 | void fw_send_phy_config(struct fw_card *card, |
417 | int node_id, int generation, int gap_count) | |
3038e353 | 418 | { |
ae1e5355 | 419 | long timeout = DIV_ROUND_UP(HZ, 10); |
2a0a2590 SR |
420 | u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG) | |
421 | PHY_CONFIG_ROOT_ID(node_id) | | |
422 | PHY_CONFIG_GAP_COUNT(gap_count); | |
423 | ||
c0220d68 SR |
424 | mutex_lock(&phy_config_mutex); |
425 | ||
426 | phy_config_packet.header[0] = data; | |
427 | phy_config_packet.header[1] = ~data; | |
428 | phy_config_packet.generation = generation; | |
429 | INIT_COMPLETION(phy_config_done); | |
430 | ||
431 | card->driver->send_request(card, &phy_config_packet); | |
432 | wait_for_completion_timeout(&phy_config_done, timeout); | |
ae1e5355 | 433 | |
c0220d68 | 434 | mutex_unlock(&phy_config_mutex); |
3038e353 KH |
435 | } |
436 | ||
53dca511 SR |
437 | static struct fw_address_handler *lookup_overlapping_address_handler( |
438 | struct list_head *list, unsigned long long offset, size_t length) | |
3038e353 KH |
439 | { |
440 | struct fw_address_handler *handler; | |
441 | ||
442 | list_for_each_entry(handler, list, link) { | |
443 | if (handler->offset < offset + length && | |
444 | offset < handler->offset + handler->length) | |
445 | return handler; | |
446 | } | |
447 | ||
448 | return NULL; | |
449 | } | |
450 | ||
db5d247a CL |
451 | static bool is_enclosing_handler(struct fw_address_handler *handler, |
452 | unsigned long long offset, size_t length) | |
453 | { | |
454 | return handler->offset <= offset && | |
455 | offset + length <= handler->offset + handler->length; | |
456 | } | |
457 | ||
53dca511 SR |
458 | static struct fw_address_handler *lookup_enclosing_address_handler( |
459 | struct list_head *list, unsigned long long offset, size_t length) | |
3038e353 KH |
460 | { |
461 | struct fw_address_handler *handler; | |
462 | ||
463 | list_for_each_entry(handler, list, link) { | |
db5d247a | 464 | if (is_enclosing_handler(handler, offset, length)) |
3038e353 KH |
465 | return handler; |
466 | } | |
467 | ||
468 | return NULL; | |
469 | } | |
470 | ||
471 | static DEFINE_SPINLOCK(address_handler_lock); | |
472 | static LIST_HEAD(address_handler_list); | |
473 | ||
21ebcd12 | 474 | const struct fw_address_region fw_high_memory_region = |
5af4e5ea | 475 | { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, }; |
db8be076 AB |
476 | EXPORT_SYMBOL(fw_high_memory_region); |
477 | ||
478 | #if 0 | |
479 | const struct fw_address_region fw_low_memory_region = | |
480 | { .start = 0x000000000000ULL, .end = 0x000100000000ULL, }; | |
21ebcd12 | 481 | const struct fw_address_region fw_private_region = |
5af4e5ea | 482 | { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, }; |
21ebcd12 | 483 | const struct fw_address_region fw_csr_region = |
cca60977 JW |
484 | { .start = CSR_REGISTER_BASE, |
485 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, }; | |
21ebcd12 | 486 | const struct fw_address_region fw_unit_space_region = |
5af4e5ea | 487 | { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, }; |
db8be076 | 488 | #endif /* 0 */ |
3038e353 | 489 | |
db5d247a CL |
490 | static bool is_in_fcp_region(u64 offset, size_t length) |
491 | { | |
492 | return offset >= (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && | |
493 | offset + length <= (CSR_REGISTER_BASE | CSR_FCP_END); | |
494 | } | |
495 | ||
3038e353 | 496 | /** |
3e0b5f0d SR |
497 | * fw_core_add_address_handler - register for incoming requests |
498 | * @handler: callback | |
499 | * @region: region in the IEEE 1212 node space address range | |
500 | * | |
501 | * region->start, ->end, and handler->length have to be quadlet-aligned. | |
502 | * | |
503 | * When a request is received that falls within the specified address range, | |
504 | * the specified callback is invoked. The parameters passed to the callback | |
505 | * give the details of the particular request. | |
1415d918 SR |
506 | * |
507 | * Return value: 0 on success, non-zero otherwise. | |
db5d247a | 508 | * |
1415d918 SR |
509 | * The start offset of the handler's address region is determined by |
510 | * fw_core_add_address_handler() and is returned in handler->offset. | |
db5d247a CL |
511 | * |
512 | * Address allocations are exclusive, except for the FCP registers. | |
3038e353 | 513 | */ |
53dca511 SR |
514 | int fw_core_add_address_handler(struct fw_address_handler *handler, |
515 | const struct fw_address_region *region) | |
3038e353 KH |
516 | { |
517 | struct fw_address_handler *other; | |
518 | unsigned long flags; | |
519 | int ret = -EBUSY; | |
520 | ||
3e0b5f0d SR |
521 | if (region->start & 0xffff000000000003ULL || |
522 | region->end & 0xffff000000000003ULL || | |
523 | region->start >= region->end || | |
524 | handler->length & 3 || | |
525 | handler->length == 0) | |
526 | return -EINVAL; | |
527 | ||
3038e353 KH |
528 | spin_lock_irqsave(&address_handler_lock, flags); |
529 | ||
3e0b5f0d | 530 | handler->offset = region->start; |
3038e353 | 531 | while (handler->offset + handler->length <= region->end) { |
db5d247a CL |
532 | if (is_in_fcp_region(handler->offset, handler->length)) |
533 | other = NULL; | |
534 | else | |
535 | other = lookup_overlapping_address_handler | |
536 | (&address_handler_list, | |
537 | handler->offset, handler->length); | |
3038e353 | 538 | if (other != NULL) { |
3e0b5f0d | 539 | handler->offset += other->length; |
3038e353 KH |
540 | } else { |
541 | list_add_tail(&handler->link, &address_handler_list); | |
542 | ret = 0; | |
543 | break; | |
544 | } | |
545 | } | |
546 | ||
547 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
548 | ||
549 | return ret; | |
550 | } | |
3038e353 KH |
551 | EXPORT_SYMBOL(fw_core_add_address_handler); |
552 | ||
553 | /** | |
44be21b6 | 554 | * fw_core_remove_address_handler - unregister an address handler |
3038e353 | 555 | */ |
3038e353 KH |
556 | void fw_core_remove_address_handler(struct fw_address_handler *handler) |
557 | { | |
558 | unsigned long flags; | |
559 | ||
560 | spin_lock_irqsave(&address_handler_lock, flags); | |
561 | list_del(&handler->link); | |
562 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
563 | } | |
3038e353 KH |
564 | EXPORT_SYMBOL(fw_core_remove_address_handler); |
565 | ||
566 | struct fw_request { | |
567 | struct fw_packet response; | |
36bfe49d | 568 | u32 request_header[4]; |
3038e353 KH |
569 | int ack; |
570 | u32 length; | |
571 | u32 data[0]; | |
572 | }; | |
573 | ||
53dca511 SR |
574 | static void free_response_callback(struct fw_packet *packet, |
575 | struct fw_card *card, int status) | |
3038e353 KH |
576 | { |
577 | struct fw_request *request; | |
578 | ||
579 | request = container_of(packet, struct fw_request, response); | |
580 | kfree(request); | |
581 | } | |
582 | ||
a10c0ce7 CL |
583 | int fw_get_response_length(struct fw_request *r) |
584 | { | |
585 | int tcode, ext_tcode, data_length; | |
586 | ||
587 | tcode = HEADER_GET_TCODE(r->request_header[0]); | |
588 | ||
589 | switch (tcode) { | |
590 | case TCODE_WRITE_QUADLET_REQUEST: | |
591 | case TCODE_WRITE_BLOCK_REQUEST: | |
592 | return 0; | |
593 | ||
594 | case TCODE_READ_QUADLET_REQUEST: | |
595 | return 4; | |
596 | ||
597 | case TCODE_READ_BLOCK_REQUEST: | |
598 | data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); | |
599 | return data_length; | |
600 | ||
601 | case TCODE_LOCK_REQUEST: | |
602 | ext_tcode = HEADER_GET_EXTENDED_TCODE(r->request_header[3]); | |
603 | data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); | |
604 | switch (ext_tcode) { | |
605 | case EXTCODE_FETCH_ADD: | |
606 | case EXTCODE_LITTLE_ADD: | |
607 | return data_length; | |
608 | default: | |
609 | return data_length / 2; | |
610 | } | |
611 | ||
612 | default: | |
f9c70f91 | 613 | WARN(1, "wrong tcode %d", tcode); |
a10c0ce7 CL |
614 | return 0; |
615 | } | |
616 | } | |
617 | ||
53dca511 SR |
618 | void fw_fill_response(struct fw_packet *response, u32 *request_header, |
619 | int rcode, void *payload, size_t length) | |
3038e353 KH |
620 | { |
621 | int tcode, tlabel, extended_tcode, source, destination; | |
622 | ||
a77754a7 KH |
623 | tcode = HEADER_GET_TCODE(request_header[0]); |
624 | tlabel = HEADER_GET_TLABEL(request_header[0]); | |
625 | source = HEADER_GET_DESTINATION(request_header[0]); | |
626 | destination = HEADER_GET_SOURCE(request_header[1]); | |
627 | extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]); | |
3038e353 KH |
628 | |
629 | response->header[0] = | |
a77754a7 KH |
630 | HEADER_RETRY(RETRY_1) | |
631 | HEADER_TLABEL(tlabel) | | |
632 | HEADER_DESTINATION(destination); | |
36bfe49d | 633 | response->header[1] = |
a77754a7 KH |
634 | HEADER_SOURCE(source) | |
635 | HEADER_RCODE(rcode); | |
3038e353 KH |
636 | response->header[2] = 0; |
637 | ||
638 | switch (tcode) { | |
639 | case TCODE_WRITE_QUADLET_REQUEST: | |
640 | case TCODE_WRITE_BLOCK_REQUEST: | |
a77754a7 | 641 | response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE); |
3038e353 KH |
642 | response->header_length = 12; |
643 | response->payload_length = 0; | |
644 | break; | |
645 | ||
646 | case TCODE_READ_QUADLET_REQUEST: | |
647 | response->header[0] |= | |
a77754a7 | 648 | HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE); |
93c4cceb KH |
649 | if (payload != NULL) |
650 | response->header[3] = *(u32 *)payload; | |
651 | else | |
652 | response->header[3] = 0; | |
3038e353 KH |
653 | response->header_length = 16; |
654 | response->payload_length = 0; | |
655 | break; | |
656 | ||
657 | case TCODE_READ_BLOCK_REQUEST: | |
658 | case TCODE_LOCK_REQUEST: | |
a77754a7 | 659 | response->header[0] |= HEADER_TCODE(tcode + 2); |
3038e353 | 660 | response->header[3] = |
a77754a7 KH |
661 | HEADER_DATA_LENGTH(length) | |
662 | HEADER_EXTENDED_TCODE(extended_tcode); | |
3038e353 | 663 | response->header_length = 16; |
36bfe49d KH |
664 | response->payload = payload; |
665 | response->payload_length = length; | |
3038e353 KH |
666 | break; |
667 | ||
668 | default: | |
f9c70f91 | 669 | WARN(1, "wrong tcode %d", tcode); |
3038e353 | 670 | } |
1d1dc5e8 | 671 | |
19593ffd | 672 | response->payload_mapped = false; |
3038e353 | 673 | } |
93c4cceb | 674 | EXPORT_SYMBOL(fw_fill_response); |
3038e353 | 675 | |
53dca511 | 676 | static struct fw_request *allocate_request(struct fw_packet *p) |
3038e353 KH |
677 | { |
678 | struct fw_request *request; | |
679 | u32 *data, length; | |
2639a6fb | 680 | int request_tcode, t; |
3038e353 | 681 | |
a77754a7 | 682 | request_tcode = HEADER_GET_TCODE(p->header[0]); |
3038e353 KH |
683 | switch (request_tcode) { |
684 | case TCODE_WRITE_QUADLET_REQUEST: | |
2639a6fb | 685 | data = &p->header[3]; |
3038e353 KH |
686 | length = 4; |
687 | break; | |
688 | ||
689 | case TCODE_WRITE_BLOCK_REQUEST: | |
690 | case TCODE_LOCK_REQUEST: | |
2639a6fb | 691 | data = p->payload; |
a77754a7 | 692 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353 KH |
693 | break; |
694 | ||
695 | case TCODE_READ_QUADLET_REQUEST: | |
696 | data = NULL; | |
697 | length = 4; | |
698 | break; | |
699 | ||
700 | case TCODE_READ_BLOCK_REQUEST: | |
701 | data = NULL; | |
a77754a7 | 702 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353 KH |
703 | break; |
704 | ||
705 | default: | |
0bf607c5 SR |
706 | fw_error("ERROR - corrupt request received - %08x %08x %08x\n", |
707 | p->header[0], p->header[1], p->header[2]); | |
3038e353 KH |
708 | return NULL; |
709 | } | |
710 | ||
2d826cc5 | 711 | request = kmalloc(sizeof(*request) + length, GFP_ATOMIC); |
3038e353 KH |
712 | if (request == NULL) |
713 | return NULL; | |
714 | ||
2639a6fb KH |
715 | t = (p->timestamp & 0x1fff) + 4000; |
716 | if (t >= 8000) | |
717 | t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000; | |
718 | else | |
719 | t = (p->timestamp & ~0x1fff) + t; | |
720 | ||
721 | request->response.speed = p->speed; | |
722 | request->response.timestamp = t; | |
723 | request->response.generation = p->generation; | |
730c32f5 | 724 | request->response.ack = 0; |
3038e353 | 725 | request->response.callback = free_response_callback; |
2639a6fb | 726 | request->ack = p->ack; |
93c4cceb | 727 | request->length = length; |
3038e353 | 728 | if (data) |
6e2e8424 | 729 | memcpy(request->data, data, length); |
3038e353 | 730 | |
2d826cc5 | 731 | memcpy(request->request_header, p->header, sizeof(p->header)); |
3038e353 KH |
732 | |
733 | return request; | |
734 | } | |
735 | ||
53dca511 SR |
736 | void fw_send_response(struct fw_card *card, |
737 | struct fw_request *request, int rcode) | |
3038e353 | 738 | { |
db5d247a CL |
739 | if (WARN_ONCE(!request, "invalid for FCP address handlers")) |
740 | return; | |
741 | ||
a7ea6782 SR |
742 | /* unified transaction or broadcast transaction: don't respond */ |
743 | if (request->ack != ACK_PENDING || | |
744 | HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) { | |
9c9bdf4d | 745 | kfree(request); |
3038e353 | 746 | return; |
9c9bdf4d | 747 | } |
3038e353 | 748 | |
36bfe49d KH |
749 | if (rcode == RCODE_COMPLETE) |
750 | fw_fill_response(&request->response, request->request_header, | |
a10c0ce7 CL |
751 | rcode, request->data, |
752 | fw_get_response_length(request)); | |
36bfe49d KH |
753 | else |
754 | fw_fill_response(&request->response, request->request_header, | |
755 | rcode, NULL, 0); | |
3038e353 KH |
756 | |
757 | card->driver->send_response(card, &request->response); | |
758 | } | |
3038e353 KH |
759 | EXPORT_SYMBOL(fw_send_response); |
760 | ||
db5d247a CL |
761 | static void handle_exclusive_region_request(struct fw_card *card, |
762 | struct fw_packet *p, | |
763 | struct fw_request *request, | |
764 | unsigned long long offset) | |
3038e353 KH |
765 | { |
766 | struct fw_address_handler *handler; | |
3038e353 | 767 | unsigned long flags; |
2639a6fb | 768 | int tcode, destination, source; |
3038e353 | 769 | |
a77754a7 KH |
770 | tcode = HEADER_GET_TCODE(p->header[0]); |
771 | destination = HEADER_GET_DESTINATION(p->header[0]); | |
478b233e | 772 | source = HEADER_GET_SOURCE(p->header[1]); |
3038e353 KH |
773 | |
774 | spin_lock_irqsave(&address_handler_lock, flags); | |
775 | handler = lookup_enclosing_address_handler(&address_handler_list, | |
776 | offset, request->length); | |
777 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
778 | ||
c781c06d KH |
779 | /* |
780 | * FIXME: lookup the fw_node corresponding to the sender of | |
3038e353 KH |
781 | * this request and pass that to the address handler instead |
782 | * of the node ID. We may also want to move the address | |
783 | * allocations to fw_node so we only do this callback if the | |
c781c06d KH |
784 | * upper layers registered it for this node. |
785 | */ | |
3038e353 KH |
786 | |
787 | if (handler == NULL) | |
788 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); | |
789 | else | |
790 | handler->address_callback(card, request, | |
791 | tcode, destination, source, | |
2639a6fb | 792 | p->generation, p->speed, offset, |
3038e353 KH |
793 | request->data, request->length, |
794 | handler->callback_data); | |
795 | } | |
db5d247a CL |
796 | |
797 | static void handle_fcp_region_request(struct fw_card *card, | |
798 | struct fw_packet *p, | |
799 | struct fw_request *request, | |
800 | unsigned long long offset) | |
801 | { | |
802 | struct fw_address_handler *handler; | |
803 | unsigned long flags; | |
804 | int tcode, destination, source; | |
805 | ||
806 | if ((offset != (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && | |
807 | offset != (CSR_REGISTER_BASE | CSR_FCP_RESPONSE)) || | |
808 | request->length > 0x200) { | |
809 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); | |
810 | ||
811 | return; | |
812 | } | |
813 | ||
814 | tcode = HEADER_GET_TCODE(p->header[0]); | |
815 | destination = HEADER_GET_DESTINATION(p->header[0]); | |
816 | source = HEADER_GET_SOURCE(p->header[1]); | |
817 | ||
818 | if (tcode != TCODE_WRITE_QUADLET_REQUEST && | |
819 | tcode != TCODE_WRITE_BLOCK_REQUEST) { | |
820 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
821 | ||
822 | return; | |
823 | } | |
824 | ||
825 | spin_lock_irqsave(&address_handler_lock, flags); | |
826 | list_for_each_entry(handler, &address_handler_list, link) { | |
827 | if (is_enclosing_handler(handler, offset, request->length)) | |
828 | handler->address_callback(card, NULL, tcode, | |
829 | destination, source, | |
830 | p->generation, p->speed, | |
831 | offset, request->data, | |
832 | request->length, | |
833 | handler->callback_data); | |
834 | } | |
835 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
836 | ||
837 | fw_send_response(card, request, RCODE_COMPLETE); | |
838 | } | |
839 | ||
840 | void fw_core_handle_request(struct fw_card *card, struct fw_packet *p) | |
841 | { | |
842 | struct fw_request *request; | |
843 | unsigned long long offset; | |
844 | ||
845 | if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE) | |
846 | return; | |
847 | ||
848 | request = allocate_request(p); | |
849 | if (request == NULL) { | |
850 | /* FIXME: send statically allocated busy packet. */ | |
851 | return; | |
852 | } | |
853 | ||
854 | offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | | |
855 | p->header[2]; | |
856 | ||
857 | if (!is_in_fcp_region(offset, request->length)) | |
858 | handle_exclusive_region_request(card, p, request, offset); | |
859 | else | |
860 | handle_fcp_region_request(card, p, request, offset); | |
861 | ||
862 | } | |
3038e353 KH |
863 | EXPORT_SYMBOL(fw_core_handle_request); |
864 | ||
53dca511 | 865 | void fw_core_handle_response(struct fw_card *card, struct fw_packet *p) |
3038e353 KH |
866 | { |
867 | struct fw_transaction *t; | |
868 | unsigned long flags; | |
869 | u32 *data; | |
870 | size_t data_length; | |
871 | int tcode, tlabel, destination, source, rcode; | |
872 | ||
a77754a7 KH |
873 | tcode = HEADER_GET_TCODE(p->header[0]); |
874 | tlabel = HEADER_GET_TLABEL(p->header[0]); | |
875 | destination = HEADER_GET_DESTINATION(p->header[0]); | |
876 | source = HEADER_GET_SOURCE(p->header[1]); | |
877 | rcode = HEADER_GET_RCODE(p->header[1]); | |
3038e353 KH |
878 | |
879 | spin_lock_irqsave(&card->lock, flags); | |
880 | list_for_each_entry(t, &card->transaction_list, link) { | |
881 | if (t->node_id == source && t->tlabel == tlabel) { | |
5c40cbfe | 882 | list_del_init(&t->link); |
753a8970 | 883 | card->tlabel_mask &= ~(1ULL << t->tlabel); |
3038e353 KH |
884 | break; |
885 | } | |
886 | } | |
887 | spin_unlock_irqrestore(&card->lock, flags); | |
888 | ||
889 | if (&t->link == &card->transaction_list) { | |
32b46093 KH |
890 | fw_notify("Unsolicited response (source %x, tlabel %x)\n", |
891 | source, tlabel); | |
3038e353 KH |
892 | return; |
893 | } | |
894 | ||
c781c06d KH |
895 | /* |
896 | * FIXME: sanity check packet, is length correct, does tcodes | |
897 | * and addresses match. | |
898 | */ | |
3038e353 KH |
899 | |
900 | switch (tcode) { | |
901 | case TCODE_READ_QUADLET_RESPONSE: | |
2639a6fb | 902 | data = (u32 *) &p->header[3]; |
3038e353 KH |
903 | data_length = 4; |
904 | break; | |
905 | ||
906 | case TCODE_WRITE_RESPONSE: | |
907 | data = NULL; | |
908 | data_length = 0; | |
909 | break; | |
910 | ||
911 | case TCODE_READ_BLOCK_RESPONSE: | |
912 | case TCODE_LOCK_RESPONSE: | |
93c4cceb | 913 | data = p->payload; |
a77754a7 | 914 | data_length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353 KH |
915 | break; |
916 | ||
917 | default: | |
918 | /* Should never happen, this is just to shut up gcc. */ | |
919 | data = NULL; | |
920 | data_length = 0; | |
921 | break; | |
922 | } | |
923 | ||
5c40cbfe CL |
924 | del_timer_sync(&t->split_timeout_timer); |
925 | ||
10a4c735 SR |
926 | /* |
927 | * The response handler may be executed while the request handler | |
928 | * is still pending. Cancel the request handler. | |
929 | */ | |
930 | card->driver->cancel_packet(card, &t->packet); | |
931 | ||
3038e353 KH |
932 | t->callback(card, rcode, data, data_length, t->callback_data); |
933 | } | |
3038e353 KH |
934 | EXPORT_SYMBOL(fw_core_handle_response); |
935 | ||
ae57988f | 936 | static const struct fw_address_region topology_map_region = |
cca60977 JW |
937 | { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP, |
938 | .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, }; | |
473d28c7 | 939 | |
53dca511 SR |
940 | static void handle_topology_map(struct fw_card *card, struct fw_request *request, |
941 | int tcode, int destination, int source, int generation, | |
942 | int speed, unsigned long long offset, | |
943 | void *payload, size_t length, void *callback_data) | |
473d28c7 | 944 | { |
cb7c96da | 945 | int start; |
473d28c7 KH |
946 | |
947 | if (!TCODE_IS_READ_REQUEST(tcode)) { | |
948 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
949 | return; | |
950 | } | |
951 | ||
952 | if ((offset & 3) > 0 || (length & 3) > 0) { | |
953 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); | |
954 | return; | |
955 | } | |
956 | ||
957 | start = (offset - topology_map_region.start) / 4; | |
cb7c96da | 958 | memcpy(payload, &card->topology_map[start], length); |
473d28c7 KH |
959 | |
960 | fw_send_response(card, request, RCODE_COMPLETE); | |
961 | } | |
962 | ||
963 | static struct fw_address_handler topology_map = { | |
85cb9b68 | 964 | .length = 0x400, |
473d28c7 KH |
965 | .address_callback = handle_topology_map, |
966 | }; | |
967 | ||
ae57988f | 968 | static const struct fw_address_region registers_region = |
cca60977 JW |
969 | { .start = CSR_REGISTER_BASE, |
970 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, }; | |
d60d7f1d | 971 | |
3e07ec0e CL |
972 | static u32 read_state_register(struct fw_card *card) |
973 | { | |
974 | /* | |
975 | * Fixed bits (IEEE 1394-2008 8.3.2.2.1): | |
976 | * Bits 0-1 (state) always read 00=running. | |
977 | * Bits 2,3 (off, atn) are not implemented as per the spec. | |
978 | * Bit 4 (elog) is not implemented because there is no error log. | |
979 | * Bit 6 (dreq) cannot be set. It is intended to "disable requests | |
980 | * from unreliable nodes"; however, IEEE 1212 states that devices | |
981 | * may "clear their own dreq bit when it has been improperly set". | |
982 | * Our implementation might be seen as an improperly extensive | |
983 | * interpretation of "improperly", but the 1212-2001 revision | |
984 | * dropped this bit altogether, so we're in the clear. :o) | |
985 | * Bit 7 (lost) always reads 0 because a power reset has never occurred | |
986 | * during normal operation. | |
987 | * Bit 9 (linkoff) is not implemented because the PC is not powered | |
988 | * from the FireWire cable. | |
989 | * Bit 15 (gone) always reads 0. It must be set at a power/command/bus | |
990 | * reset, but then cleared when the units are ready again, which | |
991 | * happens immediately for us. | |
992 | */ | |
993 | return 0; | |
994 | } | |
995 | ||
53dca511 SR |
996 | static void handle_registers(struct fw_card *card, struct fw_request *request, |
997 | int tcode, int destination, int source, int generation, | |
998 | int speed, unsigned long long offset, | |
999 | void *payload, size_t length, void *callback_data) | |
d60d7f1d | 1000 | { |
15f0d833 | 1001 | int reg = offset & ~CSR_REGISTER_BASE; |
d60d7f1d | 1002 | __be32 *data = payload; |
e534fe16 | 1003 | int rcode = RCODE_COMPLETE; |
d60d7f1d KH |
1004 | |
1005 | switch (reg) { | |
3e07ec0e CL |
1006 | case CSR_STATE_CLEAR: |
1007 | if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1008 | *data = cpu_to_be32(read_state_register(card)); | |
1009 | } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { | |
1010 | } else { | |
1011 | rcode = RCODE_TYPE_ERROR; | |
1012 | } | |
1013 | break; | |
1014 | ||
1015 | case CSR_STATE_SET: | |
1016 | if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1017 | *data = cpu_to_be32(read_state_register(card)); | |
1018 | } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { | |
1019 | /* FIXME: implement cmstr */ | |
1020 | /* FIXME: implement abdicate */ | |
1021 | } else { | |
1022 | rcode = RCODE_TYPE_ERROR; | |
1023 | } | |
1024 | break; | |
1025 | ||
506f1a31 CL |
1026 | case CSR_NODE_IDS: |
1027 | if (tcode == TCODE_READ_QUADLET_REQUEST) | |
1028 | *data = cpu_to_be32(card->driver-> | |
1029 | read_csr_reg(card, CSR_NODE_IDS)); | |
1030 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) | |
1031 | card->driver->write_csr_reg(card, CSR_NODE_IDS, | |
1032 | be32_to_cpu(*data)); | |
1033 | else | |
1034 | rcode = RCODE_TYPE_ERROR; | |
1035 | break; | |
1036 | ||
d60d7f1d | 1037 | case CSR_CYCLE_TIME: |
168cf9af | 1038 | if (TCODE_IS_READ_REQUEST(tcode) && length == 4) |
60d32970 CL |
1039 | *data = cpu_to_be32(card->driver-> |
1040 | read_csr_reg(card, CSR_CYCLE_TIME)); | |
d60d7f1d | 1041 | else |
168cf9af | 1042 | rcode = RCODE_TYPE_ERROR; |
e534fe16 SR |
1043 | break; |
1044 | ||
1045 | case CSR_BROADCAST_CHANNEL: | |
1046 | if (tcode == TCODE_READ_QUADLET_REQUEST) | |
1047 | *data = cpu_to_be32(card->broadcast_channel); | |
1048 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) | |
1049 | card->broadcast_channel = | |
1050 | (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) | | |
1051 | BROADCAST_CHANNEL_INITIAL; | |
1052 | else | |
1053 | rcode = RCODE_TYPE_ERROR; | |
d60d7f1d KH |
1054 | break; |
1055 | ||
1056 | case CSR_BUS_MANAGER_ID: | |
1057 | case CSR_BANDWIDTH_AVAILABLE: | |
1058 | case CSR_CHANNELS_AVAILABLE_HI: | |
1059 | case CSR_CHANNELS_AVAILABLE_LO: | |
c781c06d KH |
1060 | /* |
1061 | * FIXME: these are handled by the OHCI hardware and | |
d60d7f1d KH |
1062 | * the stack never sees these request. If we add |
1063 | * support for a new type of controller that doesn't | |
1064 | * handle this in hardware we need to deal with these | |
c781c06d KH |
1065 | * transactions. |
1066 | */ | |
d60d7f1d KH |
1067 | BUG(); |
1068 | break; | |
1069 | ||
1070 | case CSR_BUSY_TIMEOUT: | |
1071 | /* FIXME: Implement this. */ | |
e534fe16 | 1072 | |
168cf9af SR |
1073 | case CSR_BUS_TIME: |
1074 | /* Useless without initialization by the bus manager. */ | |
1075 | ||
d60d7f1d | 1076 | default: |
e534fe16 | 1077 | rcode = RCODE_ADDRESS_ERROR; |
d60d7f1d KH |
1078 | break; |
1079 | } | |
e534fe16 SR |
1080 | |
1081 | fw_send_response(card, request, rcode); | |
d60d7f1d KH |
1082 | } |
1083 | ||
1084 | static struct fw_address_handler registers = { | |
1085 | .length = 0x400, | |
1086 | .address_callback = handle_registers, | |
1087 | }; | |
1088 | ||
3038e353 KH |
1089 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1090 | MODULE_DESCRIPTION("Core IEEE1394 transaction logic"); | |
1091 | MODULE_LICENSE("GPL"); | |
1092 | ||
937f6879 | 1093 | static const u32 vendor_textual_descriptor[] = { |
3038e353 | 1094 | /* textual descriptor leaf () */ |
937f6879 | 1095 | 0x00060000, |
3038e353 KH |
1096 | 0x00000000, |
1097 | 0x00000000, | |
1098 | 0x4c696e75, /* L i n u */ | |
1099 | 0x78204669, /* x F i */ | |
1100 | 0x72657769, /* r e w i */ | |
937f6879 | 1101 | 0x72650000, /* r e */ |
3038e353 KH |
1102 | }; |
1103 | ||
937f6879 KH |
1104 | static const u32 model_textual_descriptor[] = { |
1105 | /* model descriptor leaf () */ | |
1106 | 0x00030000, | |
1107 | 0x00000000, | |
1108 | 0x00000000, | |
1109 | 0x4a756a75, /* J u j u */ | |
1110 | }; | |
1111 | ||
1112 | static struct fw_descriptor vendor_id_descriptor = { | |
1113 | .length = ARRAY_SIZE(vendor_textual_descriptor), | |
1114 | .immediate = 0x03d00d1e, | |
3038e353 | 1115 | .key = 0x81000000, |
937f6879 KH |
1116 | .data = vendor_textual_descriptor, |
1117 | }; | |
1118 | ||
1119 | static struct fw_descriptor model_id_descriptor = { | |
1120 | .length = ARRAY_SIZE(model_textual_descriptor), | |
1121 | .immediate = 0x17000001, | |
1122 | .key = 0x81000000, | |
1123 | .data = model_textual_descriptor, | |
3038e353 KH |
1124 | }; |
1125 | ||
3038e353 KH |
1126 | static int __init fw_core_init(void) |
1127 | { | |
2dbd7d7e | 1128 | int ret; |
3038e353 | 1129 | |
2dbd7d7e SR |
1130 | ret = bus_register(&fw_bus_type); |
1131 | if (ret < 0) | |
1132 | return ret; | |
3038e353 | 1133 | |
a3aca3da KH |
1134 | fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops); |
1135 | if (fw_cdev_major < 0) { | |
1136 | bus_unregister(&fw_bus_type); | |
1137 | return fw_cdev_major; | |
1138 | } | |
1139 | ||
c490a6de SR |
1140 | fw_core_add_address_handler(&topology_map, &topology_map_region); |
1141 | fw_core_add_address_handler(®isters, ®isters_region); | |
1142 | fw_core_add_descriptor(&vendor_id_descriptor); | |
1143 | fw_core_add_descriptor(&model_id_descriptor); | |
3038e353 KH |
1144 | |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | static void __exit fw_core_cleanup(void) | |
1149 | { | |
a3aca3da | 1150 | unregister_chrdev(fw_cdev_major, "firewire"); |
3038e353 | 1151 | bus_unregister(&fw_bus_type); |
d6053e08 | 1152 | idr_destroy(&fw_device_idr); |
3038e353 KH |
1153 | } |
1154 | ||
1155 | module_init(fw_core_init); | |
1156 | module_exit(fw_core_cleanup); |