Commit | Line | Data |
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c781c06d KH |
1 | /* |
2 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> | |
3038e353 KH |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/errno.h> | |
855c603d | 21 | #include <linux/delay.h> |
3038e353 | 22 | #include <linux/device.h> |
6a5033be | 23 | #include <linux/mutex.h> |
e175569c | 24 | #include <linux/crc-itu-t.h> |
3038e353 KH |
25 | #include "fw-transaction.h" |
26 | #include "fw-topology.h" | |
19a15b93 | 27 | #include "fw-device.h" |
3038e353 | 28 | |
e175569c | 29 | int fw_compute_block_crc(u32 *block) |
3038e353 | 30 | { |
e175569c KH |
31 | __be32 be32_block[256]; |
32 | int i, length; | |
33 | ||
34 | length = (*block >> 16) & 0xff; | |
35 | for (i = 0; i < length; i++) | |
36 | be32_block[i] = cpu_to_be32(block[i + 1]); | |
37 | *block |= crc_itu_t(0, (u8 *) be32_block, length * 4); | |
3038e353 | 38 | |
e175569c | 39 | return length; |
3038e353 KH |
40 | } |
41 | ||
6a5033be | 42 | static DEFINE_MUTEX(card_mutex); |
3038e353 KH |
43 | static LIST_HEAD(card_list); |
44 | ||
45 | static LIST_HEAD(descriptor_list); | |
46 | static int descriptor_count; | |
47 | ||
a77754a7 KH |
48 | #define BIB_CRC(v) ((v) << 0) |
49 | #define BIB_CRC_LENGTH(v) ((v) << 16) | |
50 | #define BIB_INFO_LENGTH(v) ((v) << 24) | |
51 | ||
52 | #define BIB_LINK_SPEED(v) ((v) << 0) | |
53 | #define BIB_GENERATION(v) ((v) << 4) | |
54 | #define BIB_MAX_ROM(v) ((v) << 8) | |
55 | #define BIB_MAX_RECEIVE(v) ((v) << 12) | |
56 | #define BIB_CYC_CLK_ACC(v) ((v) << 16) | |
57 | #define BIB_PMC ((1) << 27) | |
58 | #define BIB_BMC ((1) << 28) | |
59 | #define BIB_ISC ((1) << 29) | |
60 | #define BIB_CMC ((1) << 30) | |
61 | #define BIB_IMC ((1) << 31) | |
3038e353 KH |
62 | |
63 | static u32 * | |
a98e2719 | 64 | generate_config_rom(struct fw_card *card, size_t *config_rom_length) |
3038e353 KH |
65 | { |
66 | struct fw_descriptor *desc; | |
67 | static u32 config_rom[256]; | |
68 | int i, j, length; | |
69 | ||
c781c06d KH |
70 | /* |
71 | * Initialize contents of config rom buffer. On the OHCI | |
5e20c282 SR |
72 | * controller, block reads to the config rom accesses the host |
73 | * memory, but quadlet read access the hardware bus info block | |
74 | * registers. That's just crack, but it means we should make | |
75 | * sure the contents of bus info block in host memory mathces | |
c781c06d KH |
76 | * the version stored in the OHCI registers. |
77 | */ | |
3038e353 | 78 | |
2d826cc5 | 79 | memset(config_rom, 0, sizeof(config_rom)); |
a77754a7 | 80 | config_rom[0] = BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0); |
3038e353 KH |
81 | config_rom[1] = 0x31333934; |
82 | ||
83 | config_rom[2] = | |
a77754a7 KH |
84 | BIB_LINK_SPEED(card->link_speed) | |
85 | BIB_GENERATION(card->config_rom_generation++ % 14 + 2) | | |
86 | BIB_MAX_ROM(2) | | |
87 | BIB_MAX_RECEIVE(card->max_receive) | | |
88 | BIB_BMC | BIB_ISC | BIB_CMC | BIB_IMC; | |
3038e353 KH |
89 | config_rom[3] = card->guid >> 32; |
90 | config_rom[4] = card->guid; | |
91 | ||
92 | /* Generate root directory. */ | |
93 | i = 5; | |
94 | config_rom[i++] = 0; | |
95 | config_rom[i++] = 0x0c0083c0; /* node capabilities */ | |
3038e353 KH |
96 | j = i + descriptor_count; |
97 | ||
98 | /* Generate root directory entries for descriptors. */ | |
99 | list_for_each_entry (desc, &descriptor_list, link) { | |
937f6879 KH |
100 | if (desc->immediate > 0) |
101 | config_rom[i++] = desc->immediate; | |
3038e353 KH |
102 | config_rom[i] = desc->key | (j - i); |
103 | i++; | |
104 | j += desc->length; | |
105 | } | |
106 | ||
107 | /* Update root directory length. */ | |
108 | config_rom[5] = (i - 5 - 1) << 16; | |
109 | ||
110 | /* End of root directory, now copy in descriptors. */ | |
111 | list_for_each_entry (desc, &descriptor_list, link) { | |
112 | memcpy(&config_rom[i], desc->data, desc->length * 4); | |
113 | i += desc->length; | |
114 | } | |
115 | ||
116 | /* Calculate CRCs for all blocks in the config rom. This | |
117 | * assumes that CRC length and info length are identical for | |
118 | * the bus info block, which is always the case for this | |
119 | * implementation. */ | |
e175569c KH |
120 | for (i = 0; i < j; i += length + 1) |
121 | length = fw_compute_block_crc(config_rom + i); | |
3038e353 KH |
122 | |
123 | *config_rom_length = j; | |
124 | ||
125 | return config_rom; | |
126 | } | |
127 | ||
128 | static void | |
a98e2719 | 129 | update_config_roms(void) |
3038e353 KH |
130 | { |
131 | struct fw_card *card; | |
132 | u32 *config_rom; | |
133 | size_t length; | |
134 | ||
135 | list_for_each_entry (card, &card_list, link) { | |
136 | config_rom = generate_config_rom(card, &length); | |
137 | card->driver->set_config_rom(card, config_rom, length); | |
138 | } | |
139 | } | |
140 | ||
141 | int | |
a98e2719 | 142 | fw_core_add_descriptor(struct fw_descriptor *desc) |
3038e353 KH |
143 | { |
144 | size_t i; | |
145 | ||
c781c06d KH |
146 | /* |
147 | * Check descriptor is valid; the length of all blocks in the | |
3038e353 | 148 | * descriptor has to add up to exactly the length of the |
c781c06d KH |
149 | * block. |
150 | */ | |
3038e353 KH |
151 | i = 0; |
152 | while (i < desc->length) | |
153 | i += (desc->data[i] >> 16) + 1; | |
154 | ||
155 | if (i != desc->length) | |
66dea3e5 | 156 | return -EINVAL; |
3038e353 | 157 | |
6a5033be | 158 | mutex_lock(&card_mutex); |
3038e353 | 159 | |
a98e2719 | 160 | list_add_tail(&desc->link, &descriptor_list); |
3038e353 | 161 | descriptor_count++; |
937f6879 KH |
162 | if (desc->immediate > 0) |
163 | descriptor_count++; | |
3038e353 KH |
164 | update_config_roms(); |
165 | ||
6a5033be | 166 | mutex_unlock(&card_mutex); |
3038e353 KH |
167 | |
168 | return 0; | |
169 | } | |
3038e353 KH |
170 | |
171 | void | |
a98e2719 | 172 | fw_core_remove_descriptor(struct fw_descriptor *desc) |
3038e353 | 173 | { |
6a5033be | 174 | mutex_lock(&card_mutex); |
3038e353 KH |
175 | |
176 | list_del(&desc->link); | |
177 | descriptor_count--; | |
937f6879 KH |
178 | if (desc->immediate > 0) |
179 | descriptor_count--; | |
3038e353 KH |
180 | update_config_roms(); |
181 | ||
6a5033be | 182 | mutex_unlock(&card_mutex); |
3038e353 | 183 | } |
3038e353 | 184 | |
83db801c KH |
185 | static const char gap_count_table[] = { |
186 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 | |
187 | }; | |
188 | ||
931c4834 KH |
189 | struct bm_data { |
190 | struct fw_transaction t; | |
191 | struct { | |
192 | __be32 arg; | |
193 | __be32 data; | |
194 | } lock; | |
195 | u32 old; | |
196 | int rcode; | |
197 | struct completion done; | |
198 | }; | |
199 | ||
19a15b93 | 200 | static void |
931c4834 KH |
201 | complete_bm_lock(struct fw_card *card, int rcode, |
202 | void *payload, size_t length, void *data) | |
203 | { | |
204 | struct bm_data *bmd = data; | |
205 | ||
206 | if (rcode == RCODE_COMPLETE) | |
207 | bmd->old = be32_to_cpu(*(__be32 *) payload); | |
208 | bmd->rcode = rcode; | |
209 | complete(&bmd->done); | |
210 | } | |
211 | ||
212 | static void | |
213 | fw_card_bm_work(struct work_struct *work) | |
19a15b93 | 214 | { |
83db801c | 215 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
15803478 SR |
216 | struct fw_device *root_device; |
217 | struct fw_node *root_node, *local_node; | |
931c4834 | 218 | struct bm_data bmd; |
19a15b93 | 219 | unsigned long flags; |
931c4834 | 220 | int root_id, new_root_id, irm_id, gap_count, generation, grace; |
25b1c3d8 | 221 | bool do_reset = false; |
19a15b93 KH |
222 | |
223 | spin_lock_irqsave(&card->lock, flags); | |
15803478 SR |
224 | local_node = card->local_node; |
225 | root_node = card->root_node; | |
226 | ||
227 | if (local_node == NULL) { | |
228 | spin_unlock_irqrestore(&card->lock, flags); | |
229 | return; | |
230 | } | |
231 | fw_node_get(local_node); | |
232 | fw_node_get(root_node); | |
19a15b93 KH |
233 | |
234 | generation = card->generation; | |
15803478 SR |
235 | root_device = root_node->data; |
236 | if (root_device) | |
237 | fw_device_get(root_device); | |
238 | root_id = root_node->node_id; | |
931c4834 KH |
239 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10)); |
240 | ||
241 | if (card->bm_generation + 1 == generation || | |
242 | (card->bm_generation != generation && grace)) { | |
c781c06d KH |
243 | /* |
244 | * This first step is to figure out who is IRM and | |
931c4834 KH |
245 | * then try to become bus manager. If the IRM is not |
246 | * well defined (e.g. does not have an active link | |
247 | * layer or does not responds to our lock request, we | |
248 | * will have to do a little vigilante bus management. | |
249 | * In that case, we do a goto into the gap count logic | |
250 | * so that when we do the reset, we still optimize the | |
251 | * gap count. That could well save a reset in the | |
c781c06d KH |
252 | * next generation. |
253 | */ | |
931c4834 KH |
254 | |
255 | irm_id = card->irm_node->node_id; | |
256 | if (!card->irm_node->link_on) { | |
15803478 | 257 | new_root_id = local_node->node_id; |
931c4834 KH |
258 | fw_notify("IRM has link off, making local node (%02x) root.\n", |
259 | new_root_id); | |
260 | goto pick_me; | |
261 | } | |
262 | ||
263 | bmd.lock.arg = cpu_to_be32(0x3f); | |
15803478 | 264 | bmd.lock.data = cpu_to_be32(local_node->node_id); |
931c4834 KH |
265 | |
266 | spin_unlock_irqrestore(&card->lock, flags); | |
267 | ||
268 | init_completion(&bmd.done); | |
269 | fw_send_request(card, &bmd.t, TCODE_LOCK_COMPARE_SWAP, | |
270 | irm_id, generation, | |
271 | SCODE_100, CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, | |
2d826cc5 | 272 | &bmd.lock, sizeof(bmd.lock), |
931c4834 KH |
273 | complete_bm_lock, &bmd); |
274 | wait_for_completion(&bmd.done); | |
275 | ||
276 | if (bmd.rcode == RCODE_GENERATION) { | |
c781c06d KH |
277 | /* |
278 | * Another bus reset happened. Just return, | |
279 | * the BM work has been rescheduled. | |
280 | */ | |
15803478 | 281 | goto out; |
931c4834 KH |
282 | } |
283 | ||
284 | if (bmd.rcode == RCODE_COMPLETE && bmd.old != 0x3f) | |
285 | /* Somebody else is BM, let them do the work. */ | |
15803478 | 286 | goto out; |
931c4834 KH |
287 | |
288 | spin_lock_irqsave(&card->lock, flags); | |
289 | if (bmd.rcode != RCODE_COMPLETE) { | |
c781c06d KH |
290 | /* |
291 | * The lock request failed, maybe the IRM | |
931c4834 KH |
292 | * isn't really IRM capable after all. Let's |
293 | * do a bus reset and pick the local node as | |
c781c06d KH |
294 | * root, and thus, IRM. |
295 | */ | |
15803478 | 296 | new_root_id = local_node->node_id; |
931c4834 KH |
297 | fw_notify("BM lock failed, making local node (%02x) root.\n", |
298 | new_root_id); | |
299 | goto pick_me; | |
300 | } | |
301 | } else if (card->bm_generation != generation) { | |
c781c06d KH |
302 | /* |
303 | * OK, we weren't BM in the last generation, and it's | |
931c4834 | 304 | * less than 100ms since last bus reset. Reschedule |
c781c06d KH |
305 | * this task 100ms from now. |
306 | */ | |
931c4834 KH |
307 | spin_unlock_irqrestore(&card->lock, flags); |
308 | schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10)); | |
15803478 | 309 | goto out; |
931c4834 KH |
310 | } |
311 | ||
c781c06d KH |
312 | /* |
313 | * We're bus manager for this generation, so next step is to | |
931c4834 | 314 | * make sure we have an active cycle master and do gap count |
c781c06d KH |
315 | * optimization. |
316 | */ | |
931c4834 | 317 | card->bm_generation = generation; |
19a15b93 | 318 | |
15803478 | 319 | if (root_device == NULL) { |
c781c06d KH |
320 | /* |
321 | * Either link_on is false, or we failed to read the | |
322 | * config rom. In either case, pick another root. | |
323 | */ | |
15803478 SR |
324 | new_root_id = local_node->node_id; |
325 | } else if (atomic_read(&root_device->state) != FW_DEVICE_RUNNING) { | |
c781c06d KH |
326 | /* |
327 | * If we haven't probed this device yet, bail out now | |
328 | * and let's try again once that's done. | |
329 | */ | |
931c4834 | 330 | spin_unlock_irqrestore(&card->lock, flags); |
15803478 | 331 | goto out; |
c9755e14 | 332 | } else if (root_device->cmc) { |
c781c06d KH |
333 | /* |
334 | * FIXME: I suppose we should set the cmstr bit in the | |
19a15b93 KH |
335 | * STATE_CLEAR register of this node, as described in |
336 | * 1394-1995, 8.4.2.6. Also, send out a force root | |
c781c06d KH |
337 | * packet for this node. |
338 | */ | |
931c4834 | 339 | new_root_id = root_id; |
83db801c | 340 | } else { |
c781c06d KH |
341 | /* |
342 | * Current root has an active link layer and we | |
19a15b93 | 343 | * successfully read the config rom, but it's not |
c781c06d KH |
344 | * cycle master capable. |
345 | */ | |
15803478 | 346 | new_root_id = local_node->node_id; |
83db801c KH |
347 | } |
348 | ||
931c4834 | 349 | pick_me: |
24d40125 SR |
350 | /* |
351 | * Pick a gap count from 1394a table E-1. The table doesn't cover | |
352 | * the typically much larger 1394b beta repeater delays though. | |
353 | */ | |
354 | if (!card->beta_repeaters_present && | |
15803478 SR |
355 | root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
356 | gap_count = gap_count_table[root_node->max_hops]; | |
83db801c KH |
357 | else |
358 | gap_count = 63; | |
359 | ||
c781c06d | 360 | /* |
25b1c3d8 SR |
361 | * Finally, figure out if we should do a reset or not. If we have |
362 | * done less than 5 resets with the same physical topology and we | |
c781c06d KH |
363 | * have either a new root or a new gap count setting, let's do it. |
364 | */ | |
19a15b93 | 365 | |
931c4834 KH |
366 | if (card->bm_retries++ < 5 && |
367 | (card->gap_count != gap_count || new_root_id != root_id)) | |
25b1c3d8 | 368 | do_reset = true; |
19a15b93 KH |
369 | |
370 | spin_unlock_irqrestore(&card->lock, flags); | |
371 | ||
83db801c KH |
372 | if (do_reset) { |
373 | fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", | |
931c4834 KH |
374 | card->index, new_root_id, gap_count); |
375 | fw_send_phy_config(card, new_root_id, generation, gap_count); | |
19a15b93 KH |
376 | fw_core_initiate_bus_reset(card, 1); |
377 | } | |
15803478 SR |
378 | out: |
379 | if (root_device) | |
380 | fw_device_put(root_device); | |
381 | fw_node_put(root_node); | |
382 | fw_node_put(local_node); | |
19a15b93 KH |
383 | } |
384 | ||
3038e353 KH |
385 | static void |
386 | flush_timer_callback(unsigned long data) | |
387 | { | |
388 | struct fw_card *card = (struct fw_card *)data; | |
389 | ||
390 | fw_flush_transactions(card); | |
391 | } | |
392 | ||
393 | void | |
21ebcd12 | 394 | fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver, |
3038e353 KH |
395 | struct device *device) |
396 | { | |
bbf19db3 | 397 | static atomic_t index = ATOMIC_INIT(-1); |
3038e353 | 398 | |
855c603d | 399 | atomic_set(&card->device_count, 0); |
bbf19db3 | 400 | card->index = atomic_inc_return(&index); |
5e20c282 | 401 | card->driver = driver; |
3038e353 | 402 | card->device = device; |
5e20c282 SR |
403 | card->current_tlabel = 0; |
404 | card->tlabel_mask = 0; | |
3038e353 KH |
405 | card->color = 0; |
406 | ||
5e20c282 | 407 | INIT_LIST_HEAD(&card->transaction_list); |
3038e353 KH |
408 | spin_lock_init(&card->lock); |
409 | setup_timer(&card->flush_timer, | |
410 | flush_timer_callback, (unsigned long)card); | |
411 | ||
412 | card->local_node = NULL; | |
413 | ||
931c4834 | 414 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
3038e353 KH |
415 | } |
416 | EXPORT_SYMBOL(fw_card_initialize); | |
417 | ||
418 | int | |
419 | fw_card_add(struct fw_card *card, | |
420 | u32 max_receive, u32 link_speed, u64 guid) | |
421 | { | |
3038e353 KH |
422 | u32 *config_rom; |
423 | size_t length; | |
424 | ||
425 | card->max_receive = max_receive; | |
426 | card->link_speed = link_speed; | |
427 | card->guid = guid; | |
428 | ||
6a5033be | 429 | mutex_lock(&card_mutex); |
a98e2719 | 430 | config_rom = generate_config_rom(card, &length); |
3038e353 | 431 | list_add_tail(&card->link, &card_list); |
6a5033be | 432 | mutex_unlock(&card_mutex); |
3038e353 KH |
433 | |
434 | return card->driver->enable(card, config_rom, length); | |
435 | } | |
436 | EXPORT_SYMBOL(fw_card_add); | |
437 | ||
438 | ||
c781c06d KH |
439 | /* |
440 | * The next few functions implements a dummy driver that use once a | |
3038e353 KH |
441 | * card driver shuts down an fw_card. This allows the driver to |
442 | * cleanly unload, as all IO to the card will be handled by the dummy | |
443 | * driver instead of calling into the (possibly) unloaded module. The | |
c781c06d KH |
444 | * dummy driver just fails all IO. |
445 | */ | |
3038e353 KH |
446 | |
447 | static int | |
448 | dummy_enable(struct fw_card *card, u32 *config_rom, size_t length) | |
449 | { | |
450 | BUG(); | |
451 | return -1; | |
452 | } | |
453 | ||
454 | static int | |
455 | dummy_update_phy_reg(struct fw_card *card, int address, | |
456 | int clear_bits, int set_bits) | |
457 | { | |
458 | return -ENODEV; | |
459 | } | |
460 | ||
461 | static int | |
462 | dummy_set_config_rom(struct fw_card *card, | |
463 | u32 *config_rom, size_t length) | |
464 | { | |
c781c06d KH |
465 | /* |
466 | * We take the card out of card_list before setting the dummy | |
467 | * driver, so this should never get called. | |
468 | */ | |
3038e353 KH |
469 | BUG(); |
470 | return -1; | |
471 | } | |
472 | ||
473 | static void | |
474 | dummy_send_request(struct fw_card *card, struct fw_packet *packet) | |
475 | { | |
5e20c282 | 476 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
477 | } |
478 | ||
479 | static void | |
480 | dummy_send_response(struct fw_card *card, struct fw_packet *packet) | |
481 | { | |
5e20c282 | 482 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
483 | } |
484 | ||
730c32f5 KH |
485 | static int |
486 | dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) | |
487 | { | |
488 | return -ENOENT; | |
489 | } | |
490 | ||
3038e353 KH |
491 | static int |
492 | dummy_enable_phys_dma(struct fw_card *card, | |
493 | int node_id, int generation) | |
494 | { | |
495 | return -ENODEV; | |
496 | } | |
497 | ||
498 | static struct fw_card_driver dummy_driver = { | |
5e20c282 | 499 | .name = "dummy", |
3038e353 KH |
500 | .enable = dummy_enable, |
501 | .update_phy_reg = dummy_update_phy_reg, | |
502 | .set_config_rom = dummy_set_config_rom, | |
5e20c282 | 503 | .send_request = dummy_send_request, |
730c32f5 | 504 | .cancel_packet = dummy_cancel_packet, |
5e20c282 | 505 | .send_response = dummy_send_response, |
5af4e5ea | 506 | .enable_phys_dma = dummy_enable_phys_dma, |
3038e353 KH |
507 | }; |
508 | ||
509 | void | |
510 | fw_core_remove_card(struct fw_card *card) | |
511 | { | |
ecab4133 MB |
512 | card->driver->update_phy_reg(card, 4, |
513 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); | |
3038e353 KH |
514 | fw_core_initiate_bus_reset(card, 1); |
515 | ||
6a5033be | 516 | mutex_lock(&card_mutex); |
3038e353 | 517 | list_del(&card->link); |
6a5033be | 518 | mutex_unlock(&card_mutex); |
3038e353 KH |
519 | |
520 | /* Set up the dummy driver. */ | |
521 | card->driver = &dummy_driver; | |
522 | ||
3038e353 | 523 | fw_destroy_nodes(card); |
855c603d SR |
524 | /* |
525 | * Wait for all device workqueue jobs to finish. Otherwise the | |
526 | * firewire-core module could be unloaded before the jobs ran. | |
527 | */ | |
528 | while (atomic_read(&card->device_count) > 0) | |
529 | msleep(100); | |
8a2d9ed3 | 530 | |
855c603d | 531 | cancel_delayed_work_sync(&card->work); |
8a2d9ed3 SR |
532 | fw_flush_transactions(card); |
533 | del_timer_sync(&card->flush_timer); | |
3038e353 KH |
534 | } |
535 | EXPORT_SYMBOL(fw_core_remove_card); | |
536 | ||
3038e353 KH |
537 | int |
538 | fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) | |
539 | { | |
ecab4133 | 540 | int reg = short_reset ? 5 : 1; |
ecab4133 MB |
541 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
542 | ||
543 | return card->driver->update_phy_reg(card, reg, 0, bit); | |
3038e353 KH |
544 | } |
545 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |