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 | } | |
c76acec6 | 179 | EXPORT_SYMBOL(fw_core_add_descriptor); |
3038e353 | 180 | |
53dca511 | 181 | void fw_core_remove_descriptor(struct fw_descriptor *desc) |
3038e353 | 182 | { |
6a5033be | 183 | mutex_lock(&card_mutex); |
3038e353 KH |
184 | |
185 | list_del(&desc->link); | |
186 | descriptor_count--; | |
937f6879 KH |
187 | if (desc->immediate > 0) |
188 | descriptor_count--; | |
3038e353 KH |
189 | update_config_roms(); |
190 | ||
6a5033be | 191 | mutex_unlock(&card_mutex); |
3038e353 | 192 | } |
c76acec6 | 193 | EXPORT_SYMBOL(fw_core_remove_descriptor); |
3038e353 | 194 | |
cbae787c | 195 | static void allocate_broadcast_channel(struct fw_card *card, int generation) |
6104ee92 | 196 | { |
cbae787c SR |
197 | int channel, bandwidth = 0; |
198 | ||
6fdc0370 SR |
199 | fw_iso_resource_manage(card, generation, 1ULL << 31, &channel, |
200 | &bandwidth, true, card->bm_transaction_data); | |
cbae787c | 201 | if (channel == 31) { |
7889b60e SR |
202 | card->broadcast_channel_allocated = true; |
203 | device_for_each_child(card->device, (void *)(long)generation, | |
099d5414 | 204 | fw_device_set_broadcast_channel); |
6104ee92 | 205 | } |
6104ee92 | 206 | } |
6104ee92 | 207 | |
83db801c KH |
208 | static const char gap_count_table[] = { |
209 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 | |
210 | }; | |
211 | ||
53dca511 | 212 | void fw_schedule_bm_work(struct fw_card *card, unsigned long delay) |
0fa1986f JF |
213 | { |
214 | int scheduled; | |
215 | ||
216 | fw_card_get(card); | |
217 | scheduled = schedule_delayed_work(&card->work, delay); | |
218 | if (!scheduled) | |
219 | fw_card_put(card); | |
220 | } | |
221 | ||
53dca511 | 222 | static void fw_card_bm_work(struct work_struct *work) |
19a15b93 | 223 | { |
83db801c | 224 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
cbae787c SR |
225 | struct fw_device *root_device; |
226 | struct fw_node *root_node; | |
19a15b93 | 227 | unsigned long flags; |
cbae787c SR |
228 | int root_id, new_root_id, irm_id, local_id; |
229 | int gap_count, generation, grace, rcode; | |
25b1c3d8 | 230 | bool do_reset = false; |
62305823 SR |
231 | bool root_device_is_running; |
232 | bool root_device_is_cmc; | |
19a15b93 KH |
233 | |
234 | spin_lock_irqsave(&card->lock, flags); | |
15803478 | 235 | |
cbae787c | 236 | if (card->local_node == NULL) { |
15803478 | 237 | spin_unlock_irqrestore(&card->lock, flags); |
0fa1986f | 238 | goto out_put_card; |
15803478 | 239 | } |
19a15b93 KH |
240 | |
241 | generation = card->generation; | |
cbae787c SR |
242 | root_node = card->root_node; |
243 | fw_node_get(root_node); | |
15803478 | 244 | root_device = root_node->data; |
62305823 SR |
245 | root_device_is_running = root_device && |
246 | atomic_read(&root_device->state) == FW_DEVICE_RUNNING; | |
247 | root_device_is_cmc = root_device && root_device->cmc; | |
cbae787c SR |
248 | root_id = root_node->node_id; |
249 | irm_id = card->irm_node->node_id; | |
250 | local_id = card->local_node->node_id; | |
e1dc7cab SR |
251 | |
252 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 8)); | |
253 | ||
8cd0bbbd | 254 | if (is_next_generation(generation, card->bm_generation) || |
931c4834 | 255 | (card->bm_generation != generation && grace)) { |
c781c06d KH |
256 | /* |
257 | * This first step is to figure out who is IRM and | |
931c4834 KH |
258 | * then try to become bus manager. If the IRM is not |
259 | * well defined (e.g. does not have an active link | |
260 | * layer or does not responds to our lock request, we | |
261 | * will have to do a little vigilante bus management. | |
262 | * In that case, we do a goto into the gap count logic | |
263 | * so that when we do the reset, we still optimize the | |
264 | * gap count. That could well save a reset in the | |
c781c06d KH |
265 | * next generation. |
266 | */ | |
931c4834 | 267 | |
cbae787c SR |
268 | if (!card->irm_node->link_on) { |
269 | new_root_id = local_id; | |
931c4834 KH |
270 | fw_notify("IRM has link off, making local node (%02x) root.\n", |
271 | new_root_id); | |
272 | goto pick_me; | |
273 | } | |
274 | ||
6fdc0370 SR |
275 | card->bm_transaction_data[0] = cpu_to_be32(0x3f); |
276 | card->bm_transaction_data[1] = cpu_to_be32(local_id); | |
931c4834 KH |
277 | |
278 | spin_unlock_irqrestore(&card->lock, flags); | |
279 | ||
1e119fa9 JF |
280 | rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP, |
281 | irm_id, generation, SCODE_100, | |
282 | CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, | |
6fdc0370 SR |
283 | card->bm_transaction_data, |
284 | sizeof(card->bm_transaction_data)); | |
931c4834 | 285 | |
1e119fa9 JF |
286 | if (rcode == RCODE_GENERATION) |
287 | /* Another bus reset, BM work has been rescheduled. */ | |
15803478 | 288 | goto out; |
931c4834 | 289 | |
1e119fa9 | 290 | if (rcode == RCODE_COMPLETE && |
6fdc0370 | 291 | card->bm_transaction_data[0] != cpu_to_be32(0x3f)) { |
cbae787c SR |
292 | |
293 | /* Somebody else is BM. Only act as IRM. */ | |
294 | if (local_id == irm_id) | |
295 | allocate_broadcast_channel(card, generation); | |
296 | ||
15803478 | 297 | goto out; |
6104ee92 | 298 | } |
931c4834 KH |
299 | |
300 | spin_lock_irqsave(&card->lock, flags); | |
1e119fa9 JF |
301 | |
302 | if (rcode != RCODE_COMPLETE) { | |
c781c06d KH |
303 | /* |
304 | * The lock request failed, maybe the IRM | |
931c4834 KH |
305 | * isn't really IRM capable after all. Let's |
306 | * do a bus reset and pick the local node as | |
c781c06d KH |
307 | * root, and thus, IRM. |
308 | */ | |
cbae787c | 309 | new_root_id = local_id; |
931c4834 KH |
310 | fw_notify("BM lock failed, making local node (%02x) root.\n", |
311 | new_root_id); | |
312 | goto pick_me; | |
313 | } | |
314 | } else if (card->bm_generation != generation) { | |
c781c06d | 315 | /* |
e1dc7cab SR |
316 | * We weren't BM in the last generation, and the last |
317 | * bus reset is less than 125ms ago. Reschedule this job. | |
c781c06d | 318 | */ |
931c4834 | 319 | spin_unlock_irqrestore(&card->lock, flags); |
e1dc7cab | 320 | fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 8)); |
15803478 | 321 | goto out; |
931c4834 KH |
322 | } |
323 | ||
c781c06d KH |
324 | /* |
325 | * We're bus manager for this generation, so next step is to | |
931c4834 | 326 | * make sure we have an active cycle master and do gap count |
c781c06d KH |
327 | * optimization. |
328 | */ | |
931c4834 | 329 | card->bm_generation = generation; |
19a15b93 | 330 | |
15803478 | 331 | if (root_device == NULL) { |
c781c06d KH |
332 | /* |
333 | * Either link_on is false, or we failed to read the | |
334 | * config rom. In either case, pick another root. | |
335 | */ | |
cbae787c | 336 | new_root_id = local_id; |
62305823 | 337 | } else if (!root_device_is_running) { |
c781c06d KH |
338 | /* |
339 | * If we haven't probed this device yet, bail out now | |
340 | * and let's try again once that's done. | |
341 | */ | |
931c4834 | 342 | spin_unlock_irqrestore(&card->lock, flags); |
15803478 | 343 | goto out; |
62305823 | 344 | } else if (root_device_is_cmc) { |
c781c06d KH |
345 | /* |
346 | * FIXME: I suppose we should set the cmstr bit in the | |
19a15b93 KH |
347 | * STATE_CLEAR register of this node, as described in |
348 | * 1394-1995, 8.4.2.6. Also, send out a force root | |
c781c06d KH |
349 | * packet for this node. |
350 | */ | |
931c4834 | 351 | new_root_id = root_id; |
83db801c | 352 | } else { |
c781c06d KH |
353 | /* |
354 | * Current root has an active link layer and we | |
19a15b93 | 355 | * successfully read the config rom, but it's not |
c781c06d KH |
356 | * cycle master capable. |
357 | */ | |
cbae787c | 358 | new_root_id = local_id; |
83db801c KH |
359 | } |
360 | ||
931c4834 | 361 | pick_me: |
24d40125 SR |
362 | /* |
363 | * Pick a gap count from 1394a table E-1. The table doesn't cover | |
364 | * the typically much larger 1394b beta repeater delays though. | |
365 | */ | |
366 | if (!card->beta_repeaters_present && | |
15803478 SR |
367 | root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
368 | gap_count = gap_count_table[root_node->max_hops]; | |
83db801c KH |
369 | else |
370 | gap_count = 63; | |
371 | ||
c781c06d | 372 | /* |
25b1c3d8 SR |
373 | * Finally, figure out if we should do a reset or not. If we have |
374 | * done less than 5 resets with the same physical topology and we | |
c781c06d KH |
375 | * have either a new root or a new gap count setting, let's do it. |
376 | */ | |
19a15b93 | 377 | |
931c4834 KH |
378 | if (card->bm_retries++ < 5 && |
379 | (card->gap_count != gap_count || new_root_id != root_id)) | |
25b1c3d8 | 380 | do_reset = true; |
19a15b93 KH |
381 | |
382 | spin_unlock_irqrestore(&card->lock, flags); | |
383 | ||
83db801c KH |
384 | if (do_reset) { |
385 | fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", | |
931c4834 KH |
386 | card->index, new_root_id, gap_count); |
387 | fw_send_phy_config(card, new_root_id, generation, gap_count); | |
19a15b93 | 388 | fw_core_initiate_bus_reset(card, 1); |
cbae787c SR |
389 | /* Will allocate broadcast channel after the reset. */ |
390 | } else { | |
391 | if (local_id == irm_id) | |
392 | allocate_broadcast_channel(card, generation); | |
19a15b93 | 393 | } |
6104ee92 | 394 | |
15803478 | 395 | out: |
15803478 | 396 | fw_node_put(root_node); |
0fa1986f JF |
397 | out_put_card: |
398 | fw_card_put(card); | |
19a15b93 KH |
399 | } |
400 | ||
53dca511 | 401 | static void flush_timer_callback(unsigned long data) |
3038e353 KH |
402 | { |
403 | struct fw_card *card = (struct fw_card *)data; | |
404 | ||
405 | fw_flush_transactions(card); | |
406 | } | |
407 | ||
53dca511 SR |
408 | void fw_card_initialize(struct fw_card *card, |
409 | const struct fw_card_driver *driver, | |
410 | struct device *device) | |
3038e353 | 411 | { |
bbf19db3 | 412 | static atomic_t index = ATOMIC_INIT(-1); |
3038e353 | 413 | |
bbf19db3 | 414 | card->index = atomic_inc_return(&index); |
5e20c282 | 415 | card->driver = driver; |
3038e353 | 416 | card->device = device; |
5e20c282 SR |
417 | card->current_tlabel = 0; |
418 | card->tlabel_mask = 0; | |
3038e353 | 419 | card->color = 0; |
e534fe16 | 420 | card->broadcast_channel = BROADCAST_CHANNEL_INITIAL; |
3038e353 | 421 | |
459f7923 SR |
422 | kref_init(&card->kref); |
423 | init_completion(&card->done); | |
5e20c282 | 424 | INIT_LIST_HEAD(&card->transaction_list); |
3038e353 KH |
425 | spin_lock_init(&card->lock); |
426 | setup_timer(&card->flush_timer, | |
427 | flush_timer_callback, (unsigned long)card); | |
428 | ||
429 | card->local_node = NULL; | |
430 | ||
931c4834 | 431 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
3038e353 KH |
432 | } |
433 | EXPORT_SYMBOL(fw_card_initialize); | |
434 | ||
53dca511 SR |
435 | int fw_card_add(struct fw_card *card, |
436 | u32 max_receive, u32 link_speed, u64 guid) | |
3038e353 | 437 | { |
3038e353 KH |
438 | u32 *config_rom; |
439 | size_t length; | |
e1eff7a3 | 440 | int ret; |
3038e353 KH |
441 | |
442 | card->max_receive = max_receive; | |
443 | card->link_speed = link_speed; | |
444 | card->guid = guid; | |
445 | ||
6a5033be | 446 | mutex_lock(&card_mutex); |
a98e2719 | 447 | config_rom = generate_config_rom(card, &length); |
3038e353 | 448 | list_add_tail(&card->link, &card_list); |
6a5033be | 449 | mutex_unlock(&card_mutex); |
3038e353 | 450 | |
e1eff7a3 SR |
451 | ret = card->driver->enable(card, config_rom, length); |
452 | if (ret < 0) { | |
b7479feb PV |
453 | mutex_lock(&card_mutex); |
454 | list_del(&card->link); | |
455 | mutex_unlock(&card_mutex); | |
456 | } | |
e1eff7a3 SR |
457 | |
458 | return ret; | |
3038e353 KH |
459 | } |
460 | EXPORT_SYMBOL(fw_card_add); | |
461 | ||
462 | ||
c781c06d | 463 | /* |
d645f4da SR |
464 | * The next few functions implement a dummy driver that is used once a card |
465 | * driver shuts down an fw_card. This allows the driver to cleanly unload, | |
466 | * as all IO to the card will be handled (and failed) by the dummy driver | |
467 | * instead of calling into the module. Only functions for iso context | |
468 | * shutdown still need to be provided by the card driver. | |
c781c06d | 469 | */ |
3038e353 | 470 | |
53dca511 | 471 | static int dummy_enable(struct fw_card *card, u32 *config_rom, size_t length) |
3038e353 KH |
472 | { |
473 | BUG(); | |
474 | return -1; | |
475 | } | |
476 | ||
53dca511 SR |
477 | static int dummy_update_phy_reg(struct fw_card *card, int address, |
478 | int clear_bits, int set_bits) | |
3038e353 KH |
479 | { |
480 | return -ENODEV; | |
481 | } | |
482 | ||
53dca511 SR |
483 | static int dummy_set_config_rom(struct fw_card *card, |
484 | u32 *config_rom, size_t length) | |
3038e353 | 485 | { |
c781c06d KH |
486 | /* |
487 | * We take the card out of card_list before setting the dummy | |
488 | * driver, so this should never get called. | |
489 | */ | |
3038e353 KH |
490 | BUG(); |
491 | return -1; | |
492 | } | |
493 | ||
53dca511 | 494 | static void dummy_send_request(struct fw_card *card, struct fw_packet *packet) |
3038e353 | 495 | { |
5e20c282 | 496 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
497 | } |
498 | ||
53dca511 | 499 | static void dummy_send_response(struct fw_card *card, struct fw_packet *packet) |
3038e353 | 500 | { |
5e20c282 | 501 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
502 | } |
503 | ||
53dca511 | 504 | static int dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
730c32f5 KH |
505 | { |
506 | return -ENOENT; | |
507 | } | |
508 | ||
53dca511 SR |
509 | static int dummy_enable_phys_dma(struct fw_card *card, |
510 | int node_id, int generation) | |
3038e353 KH |
511 | { |
512 | return -ENODEV; | |
513 | } | |
514 | ||
d645f4da | 515 | static const struct fw_card_driver dummy_driver_template = { |
3038e353 KH |
516 | .enable = dummy_enable, |
517 | .update_phy_reg = dummy_update_phy_reg, | |
518 | .set_config_rom = dummy_set_config_rom, | |
5e20c282 | 519 | .send_request = dummy_send_request, |
730c32f5 | 520 | .cancel_packet = dummy_cancel_packet, |
5e20c282 | 521 | .send_response = dummy_send_response, |
5af4e5ea | 522 | .enable_phys_dma = dummy_enable_phys_dma, |
3038e353 KH |
523 | }; |
524 | ||
53dca511 | 525 | void fw_card_release(struct kref *kref) |
459f7923 SR |
526 | { |
527 | struct fw_card *card = container_of(kref, struct fw_card, kref); | |
528 | ||
529 | complete(&card->done); | |
530 | } | |
531 | ||
53dca511 | 532 | void fw_core_remove_card(struct fw_card *card) |
3038e353 | 533 | { |
d645f4da SR |
534 | struct fw_card_driver dummy_driver = dummy_driver_template; |
535 | ||
ecab4133 MB |
536 | card->driver->update_phy_reg(card, 4, |
537 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); | |
3038e353 KH |
538 | fw_core_initiate_bus_reset(card, 1); |
539 | ||
6a5033be | 540 | mutex_lock(&card_mutex); |
e747a5c0 | 541 | list_del_init(&card->link); |
6a5033be | 542 | mutex_unlock(&card_mutex); |
3038e353 | 543 | |
d645f4da SR |
544 | /* Switch off most of the card driver interface. */ |
545 | dummy_driver.free_iso_context = card->driver->free_iso_context; | |
546 | dummy_driver.stop_iso = card->driver->stop_iso; | |
3038e353 KH |
547 | card->driver = &dummy_driver; |
548 | ||
3038e353 | 549 | fw_destroy_nodes(card); |
459f7923 SR |
550 | |
551 | /* Wait for all users, especially device workqueue jobs, to finish. */ | |
552 | fw_card_put(card); | |
553 | wait_for_completion(&card->done); | |
8a2d9ed3 | 554 | |
1e8afea1 | 555 | WARN_ON(!list_empty(&card->transaction_list)); |
8a2d9ed3 | 556 | del_timer_sync(&card->flush_timer); |
3038e353 KH |
557 | } |
558 | EXPORT_SYMBOL(fw_core_remove_card); | |
559 | ||
53dca511 | 560 | int fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) |
3038e353 | 561 | { |
ecab4133 | 562 | int reg = short_reset ? 5 : 1; |
ecab4133 MB |
563 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
564 | ||
565 | return card->driver->update_phy_reg(card, reg, 0, bit); | |
3038e353 KH |
566 | } |
567 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |