Commit | Line | Data |
---|---|---|
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 | ||
e8ca9702 | 19 | #include <linux/bug.h> |
459f7923 SR |
20 | #include <linux/completion.h> |
21 | #include <linux/crc-itu-t.h> | |
3038e353 | 22 | #include <linux/device.h> |
459f7923 | 23 | #include <linux/errno.h> |
77c9a5da SR |
24 | #include <linux/firewire.h> |
25 | #include <linux/firewire-constants.h> | |
e8ca9702 SR |
26 | #include <linux/jiffies.h> |
27 | #include <linux/kernel.h> | |
459f7923 | 28 | #include <linux/kref.h> |
e8ca9702 | 29 | #include <linux/list.h> |
459f7923 | 30 | #include <linux/module.h> |
6a5033be | 31 | #include <linux/mutex.h> |
e8ca9702 SR |
32 | #include <linux/spinlock.h> |
33 | #include <linux/timer.h> | |
34 | #include <linux/workqueue.h> | |
35 | ||
36 | #include <asm/atomic.h> | |
37 | #include <asm/byteorder.h> | |
459f7923 | 38 | |
77c9a5da | 39 | #include "core.h" |
3038e353 | 40 | |
e175569c | 41 | int fw_compute_block_crc(u32 *block) |
3038e353 | 42 | { |
e175569c KH |
43 | __be32 be32_block[256]; |
44 | int i, length; | |
45 | ||
46 | length = (*block >> 16) & 0xff; | |
47 | for (i = 0; i < length; i++) | |
48 | be32_block[i] = cpu_to_be32(block[i + 1]); | |
49 | *block |= crc_itu_t(0, (u8 *) be32_block, length * 4); | |
3038e353 | 50 | |
e175569c | 51 | return length; |
3038e353 KH |
52 | } |
53 | ||
6a5033be | 54 | static DEFINE_MUTEX(card_mutex); |
3038e353 KH |
55 | static LIST_HEAD(card_list); |
56 | ||
57 | static LIST_HEAD(descriptor_list); | |
58 | static int descriptor_count; | |
59 | ||
a77754a7 KH |
60 | #define BIB_CRC(v) ((v) << 0) |
61 | #define BIB_CRC_LENGTH(v) ((v) << 16) | |
62 | #define BIB_INFO_LENGTH(v) ((v) << 24) | |
63 | ||
64 | #define BIB_LINK_SPEED(v) ((v) << 0) | |
65 | #define BIB_GENERATION(v) ((v) << 4) | |
66 | #define BIB_MAX_ROM(v) ((v) << 8) | |
67 | #define BIB_MAX_RECEIVE(v) ((v) << 12) | |
68 | #define BIB_CYC_CLK_ACC(v) ((v) << 16) | |
69 | #define BIB_PMC ((1) << 27) | |
70 | #define BIB_BMC ((1) << 28) | |
71 | #define BIB_ISC ((1) << 29) | |
72 | #define BIB_CMC ((1) << 30) | |
73 | #define BIB_IMC ((1) << 31) | |
3038e353 | 74 | |
53dca511 | 75 | static u32 *generate_config_rom(struct fw_card *card, size_t *config_rom_length) |
3038e353 KH |
76 | { |
77 | struct fw_descriptor *desc; | |
78 | static u32 config_rom[256]; | |
79 | int i, j, length; | |
80 | ||
c781c06d KH |
81 | /* |
82 | * Initialize contents of config rom buffer. On the OHCI | |
5e20c282 SR |
83 | * controller, block reads to the config rom accesses the host |
84 | * memory, but quadlet read access the hardware bus info block | |
85 | * registers. That's just crack, but it means we should make | |
2cc489c2 | 86 | * sure the contents of bus info block in host memory matches |
c781c06d KH |
87 | * the version stored in the OHCI registers. |
88 | */ | |
3038e353 | 89 | |
2d826cc5 | 90 | memset(config_rom, 0, sizeof(config_rom)); |
a77754a7 | 91 | config_rom[0] = BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0); |
3038e353 KH |
92 | config_rom[1] = 0x31333934; |
93 | ||
94 | config_rom[2] = | |
a77754a7 KH |
95 | BIB_LINK_SPEED(card->link_speed) | |
96 | BIB_GENERATION(card->config_rom_generation++ % 14 + 2) | | |
97 | BIB_MAX_ROM(2) | | |
98 | BIB_MAX_RECEIVE(card->max_receive) | | |
99 | BIB_BMC | BIB_ISC | BIB_CMC | BIB_IMC; | |
3038e353 KH |
100 | config_rom[3] = card->guid >> 32; |
101 | config_rom[4] = card->guid; | |
102 | ||
103 | /* Generate root directory. */ | |
104 | i = 5; | |
105 | config_rom[i++] = 0; | |
106 | config_rom[i++] = 0x0c0083c0; /* node capabilities */ | |
3038e353 KH |
107 | j = i + descriptor_count; |
108 | ||
109 | /* Generate root directory entries for descriptors. */ | |
110 | list_for_each_entry (desc, &descriptor_list, link) { | |
937f6879 KH |
111 | if (desc->immediate > 0) |
112 | config_rom[i++] = desc->immediate; | |
3038e353 KH |
113 | config_rom[i] = desc->key | (j - i); |
114 | i++; | |
115 | j += desc->length; | |
116 | } | |
117 | ||
118 | /* Update root directory length. */ | |
119 | config_rom[5] = (i - 5 - 1) << 16; | |
120 | ||
121 | /* End of root directory, now copy in descriptors. */ | |
122 | list_for_each_entry (desc, &descriptor_list, link) { | |
123 | memcpy(&config_rom[i], desc->data, desc->length * 4); | |
124 | i += desc->length; | |
125 | } | |
126 | ||
127 | /* Calculate CRCs for all blocks in the config rom. This | |
128 | * assumes that CRC length and info length are identical for | |
129 | * the bus info block, which is always the case for this | |
130 | * implementation. */ | |
e175569c KH |
131 | for (i = 0; i < j; i += length + 1) |
132 | length = fw_compute_block_crc(config_rom + i); | |
3038e353 KH |
133 | |
134 | *config_rom_length = j; | |
135 | ||
136 | return config_rom; | |
137 | } | |
138 | ||
53dca511 | 139 | static void update_config_roms(void) |
3038e353 KH |
140 | { |
141 | struct fw_card *card; | |
142 | u32 *config_rom; | |
143 | size_t length; | |
144 | ||
145 | list_for_each_entry (card, &card_list, link) { | |
146 | config_rom = generate_config_rom(card, &length); | |
147 | card->driver->set_config_rom(card, config_rom, length); | |
148 | } | |
149 | } | |
150 | ||
53dca511 | 151 | int fw_core_add_descriptor(struct fw_descriptor *desc) |
3038e353 KH |
152 | { |
153 | size_t i; | |
154 | ||
c781c06d KH |
155 | /* |
156 | * Check descriptor is valid; the length of all blocks in the | |
3038e353 | 157 | * descriptor has to add up to exactly the length of the |
c781c06d KH |
158 | * block. |
159 | */ | |
3038e353 KH |
160 | i = 0; |
161 | while (i < desc->length) | |
162 | i += (desc->data[i] >> 16) + 1; | |
163 | ||
164 | if (i != desc->length) | |
66dea3e5 | 165 | return -EINVAL; |
3038e353 | 166 | |
6a5033be | 167 | mutex_lock(&card_mutex); |
3038e353 | 168 | |
a98e2719 | 169 | list_add_tail(&desc->link, &descriptor_list); |
3038e353 | 170 | descriptor_count++; |
937f6879 KH |
171 | if (desc->immediate > 0) |
172 | descriptor_count++; | |
3038e353 KH |
173 | update_config_roms(); |
174 | ||
6a5033be | 175 | mutex_unlock(&card_mutex); |
3038e353 KH |
176 | |
177 | return 0; | |
178 | } | |
3038e353 | 179 | |
53dca511 | 180 | void fw_core_remove_descriptor(struct fw_descriptor *desc) |
3038e353 | 181 | { |
6a5033be | 182 | mutex_lock(&card_mutex); |
3038e353 KH |
183 | |
184 | list_del(&desc->link); | |
185 | descriptor_count--; | |
937f6879 KH |
186 | if (desc->immediate > 0) |
187 | descriptor_count--; | |
3038e353 KH |
188 | update_config_roms(); |
189 | ||
6a5033be | 190 | mutex_unlock(&card_mutex); |
3038e353 | 191 | } |
3038e353 | 192 | |
cbae787c | 193 | static void allocate_broadcast_channel(struct fw_card *card, int generation) |
6104ee92 | 194 | { |
cbae787c SR |
195 | int channel, bandwidth = 0; |
196 | ||
197 | fw_iso_resource_manage(card, generation, 1ULL << 31, | |
198 | &channel, &bandwidth, true); | |
199 | if (channel == 31) { | |
7889b60e SR |
200 | card->broadcast_channel_allocated = true; |
201 | device_for_each_child(card->device, (void *)(long)generation, | |
099d5414 | 202 | fw_device_set_broadcast_channel); |
6104ee92 | 203 | } |
6104ee92 | 204 | } |
6104ee92 | 205 | |
83db801c KH |
206 | static const char gap_count_table[] = { |
207 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 | |
208 | }; | |
209 | ||
53dca511 | 210 | void fw_schedule_bm_work(struct fw_card *card, unsigned long delay) |
0fa1986f JF |
211 | { |
212 | int scheduled; | |
213 | ||
214 | fw_card_get(card); | |
215 | scheduled = schedule_delayed_work(&card->work, delay); | |
216 | if (!scheduled) | |
217 | fw_card_put(card); | |
218 | } | |
219 | ||
53dca511 | 220 | static void fw_card_bm_work(struct work_struct *work) |
19a15b93 | 221 | { |
83db801c | 222 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
cbae787c SR |
223 | struct fw_device *root_device; |
224 | struct fw_node *root_node; | |
19a15b93 | 225 | unsigned long flags; |
cbae787c SR |
226 | int root_id, new_root_id, irm_id, local_id; |
227 | int gap_count, generation, grace, rcode; | |
25b1c3d8 | 228 | bool do_reset = false; |
62305823 SR |
229 | bool root_device_is_running; |
230 | bool root_device_is_cmc; | |
1e119fa9 | 231 | __be32 lock_data[2]; |
19a15b93 KH |
232 | |
233 | spin_lock_irqsave(&card->lock, flags); | |
15803478 | 234 | |
cbae787c | 235 | if (card->local_node == NULL) { |
15803478 | 236 | spin_unlock_irqrestore(&card->lock, flags); |
0fa1986f | 237 | goto out_put_card; |
15803478 | 238 | } |
19a15b93 KH |
239 | |
240 | generation = card->generation; | |
cbae787c SR |
241 | root_node = card->root_node; |
242 | fw_node_get(root_node); | |
15803478 | 243 | root_device = root_node->data; |
62305823 SR |
244 | root_device_is_running = root_device && |
245 | atomic_read(&root_device->state) == FW_DEVICE_RUNNING; | |
246 | root_device_is_cmc = root_device && root_device->cmc; | |
cbae787c SR |
247 | root_id = root_node->node_id; |
248 | irm_id = card->irm_node->node_id; | |
249 | local_id = card->local_node->node_id; | |
e1dc7cab SR |
250 | |
251 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 8)); | |
252 | ||
8cd0bbbd | 253 | if (is_next_generation(generation, card->bm_generation) || |
931c4834 | 254 | (card->bm_generation != generation && grace)) { |
c781c06d KH |
255 | /* |
256 | * This first step is to figure out who is IRM and | |
931c4834 KH |
257 | * then try to become bus manager. If the IRM is not |
258 | * well defined (e.g. does not have an active link | |
259 | * layer or does not responds to our lock request, we | |
260 | * will have to do a little vigilante bus management. | |
261 | * In that case, we do a goto into the gap count logic | |
262 | * so that when we do the reset, we still optimize the | |
263 | * gap count. That could well save a reset in the | |
c781c06d KH |
264 | * next generation. |
265 | */ | |
931c4834 | 266 | |
cbae787c SR |
267 | if (!card->irm_node->link_on) { |
268 | new_root_id = local_id; | |
931c4834 KH |
269 | fw_notify("IRM has link off, making local node (%02x) root.\n", |
270 | new_root_id); | |
271 | goto pick_me; | |
272 | } | |
273 | ||
1e119fa9 | 274 | lock_data[0] = cpu_to_be32(0x3f); |
cbae787c | 275 | lock_data[1] = cpu_to_be32(local_id); |
931c4834 KH |
276 | |
277 | spin_unlock_irqrestore(&card->lock, flags); | |
278 | ||
1e119fa9 JF |
279 | rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP, |
280 | irm_id, generation, SCODE_100, | |
281 | CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, | |
282 | lock_data, sizeof(lock_data)); | |
931c4834 | 283 | |
1e119fa9 JF |
284 | if (rcode == RCODE_GENERATION) |
285 | /* Another bus reset, BM work has been rescheduled. */ | |
15803478 | 286 | goto out; |
931c4834 | 287 | |
1e119fa9 | 288 | if (rcode == RCODE_COMPLETE && |
6104ee92 | 289 | lock_data[0] != cpu_to_be32(0x3f)) { |
cbae787c SR |
290 | |
291 | /* Somebody else is BM. Only act as IRM. */ | |
292 | if (local_id == irm_id) | |
293 | allocate_broadcast_channel(card, generation); | |
294 | ||
15803478 | 295 | goto out; |
6104ee92 | 296 | } |
931c4834 KH |
297 | |
298 | spin_lock_irqsave(&card->lock, flags); | |
1e119fa9 JF |
299 | |
300 | if (rcode != RCODE_COMPLETE) { | |
c781c06d KH |
301 | /* |
302 | * The lock request failed, maybe the IRM | |
931c4834 KH |
303 | * isn't really IRM capable after all. Let's |
304 | * do a bus reset and pick the local node as | |
c781c06d KH |
305 | * root, and thus, IRM. |
306 | */ | |
cbae787c | 307 | new_root_id = local_id; |
931c4834 KH |
308 | fw_notify("BM lock failed, making local node (%02x) root.\n", |
309 | new_root_id); | |
310 | goto pick_me; | |
311 | } | |
312 | } else if (card->bm_generation != generation) { | |
c781c06d | 313 | /* |
e1dc7cab SR |
314 | * We weren't BM in the last generation, and the last |
315 | * bus reset is less than 125ms ago. Reschedule this job. | |
c781c06d | 316 | */ |
931c4834 | 317 | spin_unlock_irqrestore(&card->lock, flags); |
e1dc7cab | 318 | fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 8)); |
15803478 | 319 | goto out; |
931c4834 KH |
320 | } |
321 | ||
c781c06d KH |
322 | /* |
323 | * We're bus manager for this generation, so next step is to | |
931c4834 | 324 | * make sure we have an active cycle master and do gap count |
c781c06d KH |
325 | * optimization. |
326 | */ | |
931c4834 | 327 | card->bm_generation = generation; |
19a15b93 | 328 | |
15803478 | 329 | if (root_device == NULL) { |
c781c06d KH |
330 | /* |
331 | * Either link_on is false, or we failed to read the | |
332 | * config rom. In either case, pick another root. | |
333 | */ | |
cbae787c | 334 | new_root_id = local_id; |
62305823 | 335 | } else if (!root_device_is_running) { |
c781c06d KH |
336 | /* |
337 | * If we haven't probed this device yet, bail out now | |
338 | * and let's try again once that's done. | |
339 | */ | |
931c4834 | 340 | spin_unlock_irqrestore(&card->lock, flags); |
15803478 | 341 | goto out; |
62305823 | 342 | } else if (root_device_is_cmc) { |
c781c06d KH |
343 | /* |
344 | * FIXME: I suppose we should set the cmstr bit in the | |
19a15b93 KH |
345 | * STATE_CLEAR register of this node, as described in |
346 | * 1394-1995, 8.4.2.6. Also, send out a force root | |
c781c06d KH |
347 | * packet for this node. |
348 | */ | |
931c4834 | 349 | new_root_id = root_id; |
83db801c | 350 | } else { |
c781c06d KH |
351 | /* |
352 | * Current root has an active link layer and we | |
19a15b93 | 353 | * successfully read the config rom, but it's not |
c781c06d KH |
354 | * cycle master capable. |
355 | */ | |
cbae787c | 356 | new_root_id = local_id; |
83db801c KH |
357 | } |
358 | ||
931c4834 | 359 | pick_me: |
24d40125 SR |
360 | /* |
361 | * Pick a gap count from 1394a table E-1. The table doesn't cover | |
362 | * the typically much larger 1394b beta repeater delays though. | |
363 | */ | |
364 | if (!card->beta_repeaters_present && | |
15803478 SR |
365 | root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
366 | gap_count = gap_count_table[root_node->max_hops]; | |
83db801c KH |
367 | else |
368 | gap_count = 63; | |
369 | ||
c781c06d | 370 | /* |
25b1c3d8 SR |
371 | * Finally, figure out if we should do a reset or not. If we have |
372 | * done less than 5 resets with the same physical topology and we | |
c781c06d KH |
373 | * have either a new root or a new gap count setting, let's do it. |
374 | */ | |
19a15b93 | 375 | |
931c4834 KH |
376 | if (card->bm_retries++ < 5 && |
377 | (card->gap_count != gap_count || new_root_id != root_id)) | |
25b1c3d8 | 378 | do_reset = true; |
19a15b93 KH |
379 | |
380 | spin_unlock_irqrestore(&card->lock, flags); | |
381 | ||
83db801c KH |
382 | if (do_reset) { |
383 | fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", | |
931c4834 KH |
384 | card->index, new_root_id, gap_count); |
385 | fw_send_phy_config(card, new_root_id, generation, gap_count); | |
19a15b93 | 386 | fw_core_initiate_bus_reset(card, 1); |
cbae787c SR |
387 | /* Will allocate broadcast channel after the reset. */ |
388 | } else { | |
389 | if (local_id == irm_id) | |
390 | allocate_broadcast_channel(card, generation); | |
19a15b93 | 391 | } |
6104ee92 | 392 | |
15803478 | 393 | out: |
15803478 | 394 | fw_node_put(root_node); |
0fa1986f JF |
395 | out_put_card: |
396 | fw_card_put(card); | |
19a15b93 KH |
397 | } |
398 | ||
53dca511 | 399 | static void flush_timer_callback(unsigned long data) |
3038e353 KH |
400 | { |
401 | struct fw_card *card = (struct fw_card *)data; | |
402 | ||
403 | fw_flush_transactions(card); | |
404 | } | |
405 | ||
53dca511 SR |
406 | void fw_card_initialize(struct fw_card *card, |
407 | const struct fw_card_driver *driver, | |
408 | struct device *device) | |
3038e353 | 409 | { |
bbf19db3 | 410 | static atomic_t index = ATOMIC_INIT(-1); |
3038e353 | 411 | |
bbf19db3 | 412 | card->index = atomic_inc_return(&index); |
5e20c282 | 413 | card->driver = driver; |
3038e353 | 414 | card->device = device; |
5e20c282 SR |
415 | card->current_tlabel = 0; |
416 | card->tlabel_mask = 0; | |
3038e353 | 417 | card->color = 0; |
e534fe16 | 418 | card->broadcast_channel = BROADCAST_CHANNEL_INITIAL; |
3038e353 | 419 | |
459f7923 SR |
420 | kref_init(&card->kref); |
421 | init_completion(&card->done); | |
5e20c282 | 422 | INIT_LIST_HEAD(&card->transaction_list); |
3038e353 KH |
423 | spin_lock_init(&card->lock); |
424 | setup_timer(&card->flush_timer, | |
425 | flush_timer_callback, (unsigned long)card); | |
426 | ||
427 | card->local_node = NULL; | |
428 | ||
931c4834 | 429 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
3038e353 KH |
430 | } |
431 | EXPORT_SYMBOL(fw_card_initialize); | |
432 | ||
53dca511 SR |
433 | int fw_card_add(struct fw_card *card, |
434 | u32 max_receive, u32 link_speed, u64 guid) | |
3038e353 | 435 | { |
3038e353 KH |
436 | u32 *config_rom; |
437 | size_t length; | |
e1eff7a3 | 438 | int ret; |
3038e353 KH |
439 | |
440 | card->max_receive = max_receive; | |
441 | card->link_speed = link_speed; | |
442 | card->guid = guid; | |
443 | ||
6a5033be | 444 | mutex_lock(&card_mutex); |
a98e2719 | 445 | config_rom = generate_config_rom(card, &length); |
3038e353 | 446 | list_add_tail(&card->link, &card_list); |
6a5033be | 447 | mutex_unlock(&card_mutex); |
3038e353 | 448 | |
e1eff7a3 SR |
449 | ret = card->driver->enable(card, config_rom, length); |
450 | if (ret < 0) { | |
b7479feb PV |
451 | mutex_lock(&card_mutex); |
452 | list_del(&card->link); | |
453 | mutex_unlock(&card_mutex); | |
454 | } | |
e1eff7a3 SR |
455 | |
456 | return ret; | |
3038e353 KH |
457 | } |
458 | EXPORT_SYMBOL(fw_card_add); | |
459 | ||
460 | ||
c781c06d KH |
461 | /* |
462 | * The next few functions implements a dummy driver that use once a | |
3038e353 KH |
463 | * card driver shuts down an fw_card. This allows the driver to |
464 | * cleanly unload, as all IO to the card will be handled by the dummy | |
465 | * driver instead of calling into the (possibly) unloaded module. The | |
c781c06d KH |
466 | * dummy driver just fails all IO. |
467 | */ | |
3038e353 | 468 | |
53dca511 | 469 | static int dummy_enable(struct fw_card *card, u32 *config_rom, size_t length) |
3038e353 KH |
470 | { |
471 | BUG(); | |
472 | return -1; | |
473 | } | |
474 | ||
53dca511 SR |
475 | static int dummy_update_phy_reg(struct fw_card *card, int address, |
476 | int clear_bits, int set_bits) | |
3038e353 KH |
477 | { |
478 | return -ENODEV; | |
479 | } | |
480 | ||
53dca511 SR |
481 | static int dummy_set_config_rom(struct fw_card *card, |
482 | u32 *config_rom, size_t length) | |
3038e353 | 483 | { |
c781c06d KH |
484 | /* |
485 | * We take the card out of card_list before setting the dummy | |
486 | * driver, so this should never get called. | |
487 | */ | |
3038e353 KH |
488 | BUG(); |
489 | return -1; | |
490 | } | |
491 | ||
53dca511 | 492 | static void dummy_send_request(struct fw_card *card, struct fw_packet *packet) |
3038e353 | 493 | { |
5e20c282 | 494 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
495 | } |
496 | ||
53dca511 | 497 | static void dummy_send_response(struct fw_card *card, struct fw_packet *packet) |
3038e353 | 498 | { |
5e20c282 | 499 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
500 | } |
501 | ||
53dca511 | 502 | static int dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
730c32f5 KH |
503 | { |
504 | return -ENOENT; | |
505 | } | |
506 | ||
53dca511 SR |
507 | static int dummy_enable_phys_dma(struct fw_card *card, |
508 | int node_id, int generation) | |
3038e353 KH |
509 | { |
510 | return -ENODEV; | |
511 | } | |
512 | ||
513 | static struct fw_card_driver dummy_driver = { | |
3038e353 KH |
514 | .enable = dummy_enable, |
515 | .update_phy_reg = dummy_update_phy_reg, | |
516 | .set_config_rom = dummy_set_config_rom, | |
5e20c282 | 517 | .send_request = dummy_send_request, |
730c32f5 | 518 | .cancel_packet = dummy_cancel_packet, |
5e20c282 | 519 | .send_response = dummy_send_response, |
5af4e5ea | 520 | .enable_phys_dma = dummy_enable_phys_dma, |
3038e353 KH |
521 | }; |
522 | ||
53dca511 | 523 | void fw_card_release(struct kref *kref) |
459f7923 SR |
524 | { |
525 | struct fw_card *card = container_of(kref, struct fw_card, kref); | |
526 | ||
527 | complete(&card->done); | |
528 | } | |
529 | ||
53dca511 | 530 | void fw_core_remove_card(struct fw_card *card) |
3038e353 | 531 | { |
ecab4133 MB |
532 | card->driver->update_phy_reg(card, 4, |
533 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); | |
3038e353 KH |
534 | fw_core_initiate_bus_reset(card, 1); |
535 | ||
6a5033be | 536 | mutex_lock(&card_mutex); |
e747a5c0 | 537 | list_del_init(&card->link); |
6a5033be | 538 | mutex_unlock(&card_mutex); |
3038e353 KH |
539 | |
540 | /* Set up the dummy driver. */ | |
541 | card->driver = &dummy_driver; | |
542 | ||
3038e353 | 543 | fw_destroy_nodes(card); |
459f7923 SR |
544 | |
545 | /* Wait for all users, especially device workqueue jobs, to finish. */ | |
546 | fw_card_put(card); | |
547 | wait_for_completion(&card->done); | |
8a2d9ed3 | 548 | |
1e8afea1 | 549 | WARN_ON(!list_empty(&card->transaction_list)); |
8a2d9ed3 | 550 | del_timer_sync(&card->flush_timer); |
3038e353 KH |
551 | } |
552 | EXPORT_SYMBOL(fw_core_remove_card); | |
553 | ||
53dca511 | 554 | int fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) |
3038e353 | 555 | { |
ecab4133 | 556 | int reg = short_reset ? 5 : 1; |
ecab4133 MB |
557 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
558 | ||
559 | return card->driver->update_phy_reg(card, reg, 0, bit); | |
3038e353 KH |
560 | } |
561 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |