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 | ||
459f7923 SR |
19 | #include <linux/completion.h> |
20 | #include <linux/crc-itu-t.h> | |
855c603d | 21 | #include <linux/delay.h> |
3038e353 | 22 | #include <linux/device.h> |
459f7923 SR |
23 | #include <linux/errno.h> |
24 | #include <linux/kref.h> | |
25 | #include <linux/module.h> | |
6a5033be | 26 | #include <linux/mutex.h> |
459f7923 | 27 | |
3038e353 KH |
28 | #include "fw-transaction.h" |
29 | #include "fw-topology.h" | |
19a15b93 | 30 | #include "fw-device.h" |
3038e353 | 31 | |
e175569c | 32 | int fw_compute_block_crc(u32 *block) |
3038e353 | 33 | { |
e175569c KH |
34 | __be32 be32_block[256]; |
35 | int i, length; | |
36 | ||
37 | length = (*block >> 16) & 0xff; | |
38 | for (i = 0; i < length; i++) | |
39 | be32_block[i] = cpu_to_be32(block[i + 1]); | |
40 | *block |= crc_itu_t(0, (u8 *) be32_block, length * 4); | |
3038e353 | 41 | |
e175569c | 42 | return length; |
3038e353 KH |
43 | } |
44 | ||
6a5033be | 45 | static DEFINE_MUTEX(card_mutex); |
3038e353 KH |
46 | static LIST_HEAD(card_list); |
47 | ||
48 | static LIST_HEAD(descriptor_list); | |
49 | static int descriptor_count; | |
50 | ||
a77754a7 KH |
51 | #define BIB_CRC(v) ((v) << 0) |
52 | #define BIB_CRC_LENGTH(v) ((v) << 16) | |
53 | #define BIB_INFO_LENGTH(v) ((v) << 24) | |
54 | ||
55 | #define BIB_LINK_SPEED(v) ((v) << 0) | |
56 | #define BIB_GENERATION(v) ((v) << 4) | |
57 | #define BIB_MAX_ROM(v) ((v) << 8) | |
58 | #define BIB_MAX_RECEIVE(v) ((v) << 12) | |
59 | #define BIB_CYC_CLK_ACC(v) ((v) << 16) | |
60 | #define BIB_PMC ((1) << 27) | |
61 | #define BIB_BMC ((1) << 28) | |
62 | #define BIB_ISC ((1) << 29) | |
63 | #define BIB_CMC ((1) << 30) | |
64 | #define BIB_IMC ((1) << 31) | |
3038e353 KH |
65 | |
66 | static u32 * | |
a98e2719 | 67 | generate_config_rom(struct fw_card *card, size_t *config_rom_length) |
3038e353 KH |
68 | { |
69 | struct fw_descriptor *desc; | |
70 | static u32 config_rom[256]; | |
71 | int i, j, length; | |
72 | ||
c781c06d KH |
73 | /* |
74 | * Initialize contents of config rom buffer. On the OHCI | |
5e20c282 SR |
75 | * controller, block reads to the config rom accesses the host |
76 | * memory, but quadlet read access the hardware bus info block | |
77 | * registers. That's just crack, but it means we should make | |
2cc489c2 | 78 | * sure the contents of bus info block in host memory matches |
c781c06d KH |
79 | * the version stored in the OHCI registers. |
80 | */ | |
3038e353 | 81 | |
2d826cc5 | 82 | memset(config_rom, 0, sizeof(config_rom)); |
a77754a7 | 83 | config_rom[0] = BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0); |
3038e353 KH |
84 | config_rom[1] = 0x31333934; |
85 | ||
86 | config_rom[2] = | |
a77754a7 KH |
87 | BIB_LINK_SPEED(card->link_speed) | |
88 | BIB_GENERATION(card->config_rom_generation++ % 14 + 2) | | |
89 | BIB_MAX_ROM(2) | | |
90 | BIB_MAX_RECEIVE(card->max_receive) | | |
91 | BIB_BMC | BIB_ISC | BIB_CMC | BIB_IMC; | |
3038e353 KH |
92 | config_rom[3] = card->guid >> 32; |
93 | config_rom[4] = card->guid; | |
94 | ||
95 | /* Generate root directory. */ | |
96 | i = 5; | |
97 | config_rom[i++] = 0; | |
98 | config_rom[i++] = 0x0c0083c0; /* node capabilities */ | |
3038e353 KH |
99 | j = i + descriptor_count; |
100 | ||
101 | /* Generate root directory entries for descriptors. */ | |
102 | list_for_each_entry (desc, &descriptor_list, link) { | |
937f6879 KH |
103 | if (desc->immediate > 0) |
104 | config_rom[i++] = desc->immediate; | |
3038e353 KH |
105 | config_rom[i] = desc->key | (j - i); |
106 | i++; | |
107 | j += desc->length; | |
108 | } | |
109 | ||
110 | /* Update root directory length. */ | |
111 | config_rom[5] = (i - 5 - 1) << 16; | |
112 | ||
113 | /* End of root directory, now copy in descriptors. */ | |
114 | list_for_each_entry (desc, &descriptor_list, link) { | |
115 | memcpy(&config_rom[i], desc->data, desc->length * 4); | |
116 | i += desc->length; | |
117 | } | |
118 | ||
119 | /* Calculate CRCs for all blocks in the config rom. This | |
120 | * assumes that CRC length and info length are identical for | |
121 | * the bus info block, which is always the case for this | |
122 | * implementation. */ | |
e175569c KH |
123 | for (i = 0; i < j; i += length + 1) |
124 | length = fw_compute_block_crc(config_rom + i); | |
3038e353 KH |
125 | |
126 | *config_rom_length = j; | |
127 | ||
128 | return config_rom; | |
129 | } | |
130 | ||
131 | static void | |
a98e2719 | 132 | update_config_roms(void) |
3038e353 KH |
133 | { |
134 | struct fw_card *card; | |
135 | u32 *config_rom; | |
136 | size_t length; | |
137 | ||
138 | list_for_each_entry (card, &card_list, link) { | |
139 | config_rom = generate_config_rom(card, &length); | |
140 | card->driver->set_config_rom(card, config_rom, length); | |
141 | } | |
142 | } | |
143 | ||
144 | int | |
a98e2719 | 145 | fw_core_add_descriptor(struct fw_descriptor *desc) |
3038e353 KH |
146 | { |
147 | size_t i; | |
148 | ||
c781c06d KH |
149 | /* |
150 | * Check descriptor is valid; the length of all blocks in the | |
3038e353 | 151 | * descriptor has to add up to exactly the length of the |
c781c06d KH |
152 | * block. |
153 | */ | |
3038e353 KH |
154 | i = 0; |
155 | while (i < desc->length) | |
156 | i += (desc->data[i] >> 16) + 1; | |
157 | ||
158 | if (i != desc->length) | |
66dea3e5 | 159 | return -EINVAL; |
3038e353 | 160 | |
6a5033be | 161 | mutex_lock(&card_mutex); |
3038e353 | 162 | |
a98e2719 | 163 | list_add_tail(&desc->link, &descriptor_list); |
3038e353 | 164 | descriptor_count++; |
937f6879 KH |
165 | if (desc->immediate > 0) |
166 | descriptor_count++; | |
3038e353 KH |
167 | update_config_roms(); |
168 | ||
6a5033be | 169 | mutex_unlock(&card_mutex); |
3038e353 KH |
170 | |
171 | return 0; | |
172 | } | |
3038e353 KH |
173 | |
174 | void | |
a98e2719 | 175 | fw_core_remove_descriptor(struct fw_descriptor *desc) |
3038e353 | 176 | { |
6a5033be | 177 | mutex_lock(&card_mutex); |
3038e353 KH |
178 | |
179 | list_del(&desc->link); | |
180 | descriptor_count--; | |
937f6879 KH |
181 | if (desc->immediate > 0) |
182 | descriptor_count--; | |
3038e353 KH |
183 | update_config_roms(); |
184 | ||
6a5033be | 185 | mutex_unlock(&card_mutex); |
3038e353 | 186 | } |
3038e353 | 187 | |
83db801c KH |
188 | static const char gap_count_table[] = { |
189 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 | |
190 | }; | |
191 | ||
931c4834 KH |
192 | static void |
193 | fw_card_bm_work(struct work_struct *work) | |
19a15b93 | 194 | { |
83db801c | 195 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
15803478 SR |
196 | struct fw_device *root_device; |
197 | struct fw_node *root_node, *local_node; | |
19a15b93 | 198 | unsigned long flags; |
1e119fa9 | 199 | int root_id, new_root_id, irm_id, gap_count, generation, grace, rcode; |
25b1c3d8 | 200 | bool do_reset = false; |
1e119fa9 | 201 | __be32 lock_data[2]; |
19a15b93 KH |
202 | |
203 | spin_lock_irqsave(&card->lock, flags); | |
15803478 SR |
204 | local_node = card->local_node; |
205 | root_node = card->root_node; | |
206 | ||
207 | if (local_node == NULL) { | |
208 | spin_unlock_irqrestore(&card->lock, flags); | |
209 | return; | |
210 | } | |
211 | fw_node_get(local_node); | |
212 | fw_node_get(root_node); | |
19a15b93 KH |
213 | |
214 | generation = card->generation; | |
15803478 SR |
215 | root_device = root_node->data; |
216 | if (root_device) | |
217 | fw_device_get(root_device); | |
218 | root_id = root_node->node_id; | |
931c4834 KH |
219 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10)); |
220 | ||
221 | if (card->bm_generation + 1 == generation || | |
222 | (card->bm_generation != generation && grace)) { | |
c781c06d KH |
223 | /* |
224 | * This first step is to figure out who is IRM and | |
931c4834 KH |
225 | * then try to become bus manager. If the IRM is not |
226 | * well defined (e.g. does not have an active link | |
227 | * layer or does not responds to our lock request, we | |
228 | * will have to do a little vigilante bus management. | |
229 | * In that case, we do a goto into the gap count logic | |
230 | * so that when we do the reset, we still optimize the | |
231 | * gap count. That could well save a reset in the | |
c781c06d KH |
232 | * next generation. |
233 | */ | |
931c4834 KH |
234 | |
235 | irm_id = card->irm_node->node_id; | |
236 | if (!card->irm_node->link_on) { | |
15803478 | 237 | new_root_id = local_node->node_id; |
931c4834 KH |
238 | fw_notify("IRM has link off, making local node (%02x) root.\n", |
239 | new_root_id); | |
240 | goto pick_me; | |
241 | } | |
242 | ||
1e119fa9 JF |
243 | lock_data[0] = cpu_to_be32(0x3f); |
244 | lock_data[1] = cpu_to_be32(local_node->node_id); | |
931c4834 KH |
245 | |
246 | spin_unlock_irqrestore(&card->lock, flags); | |
247 | ||
1e119fa9 JF |
248 | rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP, |
249 | irm_id, generation, SCODE_100, | |
250 | CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, | |
251 | lock_data, sizeof(lock_data)); | |
931c4834 | 252 | |
1e119fa9 JF |
253 | if (rcode == RCODE_GENERATION) |
254 | /* Another bus reset, BM work has been rescheduled. */ | |
15803478 | 255 | goto out; |
931c4834 | 256 | |
1e119fa9 JF |
257 | if (rcode == RCODE_COMPLETE && |
258 | lock_data[0] != cpu_to_be32(0x3f)) | |
931c4834 | 259 | /* Somebody else is BM, let them do the work. */ |
15803478 | 260 | goto out; |
931c4834 KH |
261 | |
262 | spin_lock_irqsave(&card->lock, flags); | |
1e119fa9 JF |
263 | |
264 | if (rcode != RCODE_COMPLETE) { | |
c781c06d KH |
265 | /* |
266 | * The lock request failed, maybe the IRM | |
931c4834 KH |
267 | * isn't really IRM capable after all. Let's |
268 | * do a bus reset and pick the local node as | |
c781c06d KH |
269 | * root, and thus, IRM. |
270 | */ | |
15803478 | 271 | new_root_id = local_node->node_id; |
931c4834 KH |
272 | fw_notify("BM lock failed, making local node (%02x) root.\n", |
273 | new_root_id); | |
274 | goto pick_me; | |
275 | } | |
276 | } else if (card->bm_generation != generation) { | |
c781c06d KH |
277 | /* |
278 | * OK, we weren't BM in the last generation, and it's | |
931c4834 | 279 | * less than 100ms since last bus reset. Reschedule |
c781c06d KH |
280 | * this task 100ms from now. |
281 | */ | |
931c4834 KH |
282 | spin_unlock_irqrestore(&card->lock, flags); |
283 | schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10)); | |
15803478 | 284 | goto out; |
931c4834 KH |
285 | } |
286 | ||
c781c06d KH |
287 | /* |
288 | * We're bus manager for this generation, so next step is to | |
931c4834 | 289 | * make sure we have an active cycle master and do gap count |
c781c06d KH |
290 | * optimization. |
291 | */ | |
931c4834 | 292 | card->bm_generation = generation; |
19a15b93 | 293 | |
15803478 | 294 | if (root_device == NULL) { |
c781c06d KH |
295 | /* |
296 | * Either link_on is false, or we failed to read the | |
297 | * config rom. In either case, pick another root. | |
298 | */ | |
15803478 SR |
299 | new_root_id = local_node->node_id; |
300 | } else if (atomic_read(&root_device->state) != FW_DEVICE_RUNNING) { | |
c781c06d KH |
301 | /* |
302 | * If we haven't probed this device yet, bail out now | |
303 | * and let's try again once that's done. | |
304 | */ | |
931c4834 | 305 | spin_unlock_irqrestore(&card->lock, flags); |
15803478 | 306 | goto out; |
c9755e14 | 307 | } else if (root_device->cmc) { |
c781c06d KH |
308 | /* |
309 | * FIXME: I suppose we should set the cmstr bit in the | |
19a15b93 KH |
310 | * STATE_CLEAR register of this node, as described in |
311 | * 1394-1995, 8.4.2.6. Also, send out a force root | |
c781c06d KH |
312 | * packet for this node. |
313 | */ | |
931c4834 | 314 | new_root_id = root_id; |
83db801c | 315 | } else { |
c781c06d KH |
316 | /* |
317 | * Current root has an active link layer and we | |
19a15b93 | 318 | * successfully read the config rom, but it's not |
c781c06d KH |
319 | * cycle master capable. |
320 | */ | |
15803478 | 321 | new_root_id = local_node->node_id; |
83db801c KH |
322 | } |
323 | ||
931c4834 | 324 | pick_me: |
24d40125 SR |
325 | /* |
326 | * Pick a gap count from 1394a table E-1. The table doesn't cover | |
327 | * the typically much larger 1394b beta repeater delays though. | |
328 | */ | |
329 | if (!card->beta_repeaters_present && | |
15803478 SR |
330 | root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
331 | gap_count = gap_count_table[root_node->max_hops]; | |
83db801c KH |
332 | else |
333 | gap_count = 63; | |
334 | ||
c781c06d | 335 | /* |
25b1c3d8 SR |
336 | * Finally, figure out if we should do a reset or not. If we have |
337 | * done less than 5 resets with the same physical topology and we | |
c781c06d KH |
338 | * have either a new root or a new gap count setting, let's do it. |
339 | */ | |
19a15b93 | 340 | |
931c4834 KH |
341 | if (card->bm_retries++ < 5 && |
342 | (card->gap_count != gap_count || new_root_id != root_id)) | |
25b1c3d8 | 343 | do_reset = true; |
19a15b93 KH |
344 | |
345 | spin_unlock_irqrestore(&card->lock, flags); | |
346 | ||
83db801c KH |
347 | if (do_reset) { |
348 | fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", | |
931c4834 KH |
349 | card->index, new_root_id, gap_count); |
350 | fw_send_phy_config(card, new_root_id, generation, gap_count); | |
19a15b93 KH |
351 | fw_core_initiate_bus_reset(card, 1); |
352 | } | |
15803478 SR |
353 | out: |
354 | if (root_device) | |
355 | fw_device_put(root_device); | |
356 | fw_node_put(root_node); | |
357 | fw_node_put(local_node); | |
19a15b93 KH |
358 | } |
359 | ||
3038e353 KH |
360 | static void |
361 | flush_timer_callback(unsigned long data) | |
362 | { | |
363 | struct fw_card *card = (struct fw_card *)data; | |
364 | ||
365 | fw_flush_transactions(card); | |
366 | } | |
367 | ||
368 | void | |
21ebcd12 | 369 | fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver, |
3038e353 KH |
370 | struct device *device) |
371 | { | |
bbf19db3 | 372 | static atomic_t index = ATOMIC_INIT(-1); |
3038e353 | 373 | |
bbf19db3 | 374 | card->index = atomic_inc_return(&index); |
5e20c282 | 375 | card->driver = driver; |
3038e353 | 376 | card->device = device; |
5e20c282 SR |
377 | card->current_tlabel = 0; |
378 | card->tlabel_mask = 0; | |
3038e353 | 379 | card->color = 0; |
e534fe16 | 380 | card->broadcast_channel = BROADCAST_CHANNEL_INITIAL; |
3038e353 | 381 | |
459f7923 SR |
382 | kref_init(&card->kref); |
383 | init_completion(&card->done); | |
5e20c282 | 384 | INIT_LIST_HEAD(&card->transaction_list); |
3038e353 KH |
385 | spin_lock_init(&card->lock); |
386 | setup_timer(&card->flush_timer, | |
387 | flush_timer_callback, (unsigned long)card); | |
388 | ||
389 | card->local_node = NULL; | |
390 | ||
931c4834 | 391 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
3038e353 KH |
392 | } |
393 | EXPORT_SYMBOL(fw_card_initialize); | |
394 | ||
395 | int | |
396 | fw_card_add(struct fw_card *card, | |
397 | u32 max_receive, u32 link_speed, u64 guid) | |
398 | { | |
3038e353 KH |
399 | u32 *config_rom; |
400 | size_t length; | |
401 | ||
402 | card->max_receive = max_receive; | |
403 | card->link_speed = link_speed; | |
404 | card->guid = guid; | |
405 | ||
6a5033be | 406 | mutex_lock(&card_mutex); |
a98e2719 | 407 | config_rom = generate_config_rom(card, &length); |
3038e353 | 408 | list_add_tail(&card->link, &card_list); |
6a5033be | 409 | mutex_unlock(&card_mutex); |
3038e353 KH |
410 | |
411 | return card->driver->enable(card, config_rom, length); | |
412 | } | |
413 | EXPORT_SYMBOL(fw_card_add); | |
414 | ||
415 | ||
c781c06d KH |
416 | /* |
417 | * The next few functions implements a dummy driver that use once a | |
3038e353 KH |
418 | * card driver shuts down an fw_card. This allows the driver to |
419 | * cleanly unload, as all IO to the card will be handled by the dummy | |
420 | * driver instead of calling into the (possibly) unloaded module. The | |
c781c06d KH |
421 | * dummy driver just fails all IO. |
422 | */ | |
3038e353 KH |
423 | |
424 | static int | |
425 | dummy_enable(struct fw_card *card, u32 *config_rom, size_t length) | |
426 | { | |
427 | BUG(); | |
428 | return -1; | |
429 | } | |
430 | ||
431 | static int | |
432 | dummy_update_phy_reg(struct fw_card *card, int address, | |
433 | int clear_bits, int set_bits) | |
434 | { | |
435 | return -ENODEV; | |
436 | } | |
437 | ||
438 | static int | |
439 | dummy_set_config_rom(struct fw_card *card, | |
440 | u32 *config_rom, size_t length) | |
441 | { | |
c781c06d KH |
442 | /* |
443 | * We take the card out of card_list before setting the dummy | |
444 | * driver, so this should never get called. | |
445 | */ | |
3038e353 KH |
446 | BUG(); |
447 | return -1; | |
448 | } | |
449 | ||
450 | static void | |
451 | dummy_send_request(struct fw_card *card, struct fw_packet *packet) | |
452 | { | |
5e20c282 | 453 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
454 | } |
455 | ||
456 | static void | |
457 | dummy_send_response(struct fw_card *card, struct fw_packet *packet) | |
458 | { | |
5e20c282 | 459 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
460 | } |
461 | ||
730c32f5 KH |
462 | static int |
463 | dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) | |
464 | { | |
465 | return -ENOENT; | |
466 | } | |
467 | ||
3038e353 KH |
468 | static int |
469 | dummy_enable_phys_dma(struct fw_card *card, | |
470 | int node_id, int generation) | |
471 | { | |
472 | return -ENODEV; | |
473 | } | |
474 | ||
475 | static struct fw_card_driver dummy_driver = { | |
3038e353 KH |
476 | .enable = dummy_enable, |
477 | .update_phy_reg = dummy_update_phy_reg, | |
478 | .set_config_rom = dummy_set_config_rom, | |
5e20c282 | 479 | .send_request = dummy_send_request, |
730c32f5 | 480 | .cancel_packet = dummy_cancel_packet, |
5e20c282 | 481 | .send_response = dummy_send_response, |
5af4e5ea | 482 | .enable_phys_dma = dummy_enable_phys_dma, |
3038e353 KH |
483 | }; |
484 | ||
459f7923 SR |
485 | void |
486 | fw_card_release(struct kref *kref) | |
487 | { | |
488 | struct fw_card *card = container_of(kref, struct fw_card, kref); | |
489 | ||
490 | complete(&card->done); | |
491 | } | |
492 | ||
3038e353 KH |
493 | void |
494 | fw_core_remove_card(struct fw_card *card) | |
495 | { | |
ecab4133 MB |
496 | card->driver->update_phy_reg(card, 4, |
497 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); | |
3038e353 KH |
498 | fw_core_initiate_bus_reset(card, 1); |
499 | ||
6a5033be | 500 | mutex_lock(&card_mutex); |
3038e353 | 501 | list_del(&card->link); |
6a5033be | 502 | mutex_unlock(&card_mutex); |
3038e353 KH |
503 | |
504 | /* Set up the dummy driver. */ | |
505 | card->driver = &dummy_driver; | |
506 | ||
3038e353 | 507 | fw_destroy_nodes(card); |
459f7923 SR |
508 | |
509 | /* Wait for all users, especially device workqueue jobs, to finish. */ | |
510 | fw_card_put(card); | |
511 | wait_for_completion(&card->done); | |
8a2d9ed3 | 512 | |
855c603d | 513 | cancel_delayed_work_sync(&card->work); |
1e8afea1 | 514 | WARN_ON(!list_empty(&card->transaction_list)); |
8a2d9ed3 | 515 | del_timer_sync(&card->flush_timer); |
3038e353 KH |
516 | } |
517 | EXPORT_SYMBOL(fw_core_remove_card); | |
518 | ||
3038e353 KH |
519 | int |
520 | fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) | |
521 | { | |
ecab4133 | 522 | int reg = short_reset ? 5 : 1; |
ecab4133 MB |
523 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
524 | ||
525 | return card->driver->update_phy_reg(card, reg, 0, bit); | |
3038e353 KH |
526 | } |
527 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |