Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 1 | /* -*- c-basic-offset: 8 -*- |
| 2 | * |
| 3 | * fw-card.c - card level functions |
| 4 | * |
| 5 | * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software Foundation, |
| 19 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/device.h> |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 25 | #include <linux/rwsem.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 26 | #include "fw-transaction.h" |
| 27 | #include "fw-topology.h" |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 28 | #include "fw-device.h" |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 29 | |
| 30 | /* The lib/crc16.c implementation uses the standard (0x8005) |
| 31 | * polynomial, but we need the ITU-T (or CCITT) polynomial (0x1021). |
| 32 | * The implementation below works on an array of host-endian u32 |
| 33 | * words, assuming they'll be transmited msb first. */ |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 34 | u16 |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 35 | crc16_itu_t(const u32 *buffer, size_t length) |
| 36 | { |
| 37 | int shift, i; |
| 38 | u32 data; |
| 39 | u16 sum, crc = 0; |
| 40 | |
| 41 | for (i = 0; i < length; i++) { |
| 42 | data = *buffer++; |
| 43 | for (shift = 28; shift >= 0; shift -= 4 ) { |
| 44 | sum = ((crc >> 12) ^ (data >> shift)) & 0xf; |
| 45 | crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum); |
| 46 | } |
| 47 | crc &= 0xffff; |
| 48 | } |
| 49 | |
| 50 | return crc; |
| 51 | } |
| 52 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 53 | static DECLARE_RWSEM(card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 54 | static LIST_HEAD(card_list); |
| 55 | |
| 56 | static LIST_HEAD(descriptor_list); |
| 57 | static int descriptor_count; |
| 58 | |
| 59 | #define bib_crc(v) ((v) << 0) |
| 60 | #define bib_crc_length(v) ((v) << 16) |
| 61 | #define bib_info_length(v) ((v) << 24) |
| 62 | |
| 63 | #define bib_link_speed(v) ((v) << 0) |
| 64 | #define bib_generation(v) ((v) << 4) |
| 65 | #define bib_max_rom(v) ((v) << 8) |
| 66 | #define bib_max_receive(v) ((v) << 12) |
| 67 | #define bib_cyc_clk_acc(v) ((v) << 16) |
| 68 | #define bib_pmc ((1) << 27) |
| 69 | #define bib_bmc ((1) << 28) |
| 70 | #define bib_isc ((1) << 29) |
| 71 | #define bib_cmc ((1) << 30) |
| 72 | #define bib_imc ((1) << 31) |
| 73 | |
| 74 | static u32 * |
| 75 | generate_config_rom (struct fw_card *card, size_t *config_rom_length) |
| 76 | { |
| 77 | struct fw_descriptor *desc; |
| 78 | static u32 config_rom[256]; |
| 79 | int i, j, length; |
| 80 | |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 81 | /* Initialize contents of config rom buffer. On the OHCI |
| 82 | * controller, block reads to the config rom accesses the host |
| 83 | * memory, but quadlet read access the hardware bus info block |
| 84 | * registers. That's just crack, but it means we should make |
| 85 | * sure the contents of bus info block in host memory mathces |
| 86 | * the version stored in the OHCI registers. */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 87 | |
| 88 | memset(config_rom, 0, sizeof config_rom); |
| 89 | config_rom[0] = bib_crc_length(4) | bib_info_length(4) | bib_crc(0); |
| 90 | config_rom[1] = 0x31333934; |
| 91 | |
| 92 | config_rom[2] = |
| 93 | bib_link_speed(card->link_speed) | |
| 94 | bib_generation(card->config_rom_generation++ % 14 + 2) | |
| 95 | bib_max_rom(2) | |
| 96 | bib_max_receive(card->max_receive) | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 97 | bib_bmc | bib_isc | bib_cmc | bib_imc; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 98 | config_rom[3] = card->guid >> 32; |
| 99 | config_rom[4] = card->guid; |
| 100 | |
| 101 | /* Generate root directory. */ |
| 102 | i = 5; |
| 103 | config_rom[i++] = 0; |
| 104 | config_rom[i++] = 0x0c0083c0; /* node capabilities */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 105 | j = i + descriptor_count; |
| 106 | |
| 107 | /* Generate root directory entries for descriptors. */ |
| 108 | list_for_each_entry (desc, &descriptor_list, link) { |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 109 | if (desc->immediate > 0) |
| 110 | config_rom[i++] = desc->immediate; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 111 | config_rom[i] = desc->key | (j - i); |
| 112 | i++; |
| 113 | j += desc->length; |
| 114 | } |
| 115 | |
| 116 | /* Update root directory length. */ |
| 117 | config_rom[5] = (i - 5 - 1) << 16; |
| 118 | |
| 119 | /* End of root directory, now copy in descriptors. */ |
| 120 | list_for_each_entry (desc, &descriptor_list, link) { |
| 121 | memcpy(&config_rom[i], desc->data, desc->length * 4); |
| 122 | i += desc->length; |
| 123 | } |
| 124 | |
| 125 | /* Calculate CRCs for all blocks in the config rom. This |
| 126 | * assumes that CRC length and info length are identical for |
| 127 | * the bus info block, which is always the case for this |
| 128 | * implementation. */ |
| 129 | for (i = 0; i < j; i += length + 1) { |
| 130 | length = (config_rom[i] >> 16) & 0xff; |
| 131 | config_rom[i] |= crc16_itu_t(&config_rom[i + 1], length); |
| 132 | } |
| 133 | |
| 134 | *config_rom_length = j; |
| 135 | |
| 136 | return config_rom; |
| 137 | } |
| 138 | |
| 139 | static void |
| 140 | update_config_roms (void) |
| 141 | { |
| 142 | struct fw_card *card; |
| 143 | u32 *config_rom; |
| 144 | size_t length; |
| 145 | |
| 146 | list_for_each_entry (card, &card_list, link) { |
| 147 | config_rom = generate_config_rom(card, &length); |
| 148 | card->driver->set_config_rom(card, config_rom, length); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | int |
| 153 | fw_core_add_descriptor (struct fw_descriptor *desc) |
| 154 | { |
| 155 | size_t i; |
| 156 | |
| 157 | /* Check descriptor is valid; the length of all blocks in the |
| 158 | * descriptor has to add up to exactly the length of the |
| 159 | * block. */ |
| 160 | i = 0; |
| 161 | while (i < desc->length) |
| 162 | i += (desc->data[i] >> 16) + 1; |
| 163 | |
| 164 | if (i != desc->length) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 165 | return -EINVAL; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 166 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 167 | down_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 168 | |
| 169 | list_add_tail (&desc->link, &descriptor_list); |
| 170 | descriptor_count++; |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 171 | if (desc->immediate > 0) |
| 172 | descriptor_count++; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 173 | update_config_roms(); |
| 174 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 175 | up_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | EXPORT_SYMBOL(fw_core_add_descriptor); |
| 180 | |
| 181 | void |
| 182 | fw_core_remove_descriptor (struct fw_descriptor *desc) |
| 183 | { |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 184 | down_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 185 | |
| 186 | list_del(&desc->link); |
| 187 | descriptor_count--; |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 188 | if (desc->immediate > 0) |
| 189 | descriptor_count--; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 190 | update_config_roms(); |
| 191 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 192 | up_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 193 | } |
| 194 | EXPORT_SYMBOL(fw_core_remove_descriptor); |
| 195 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 196 | static const char gap_count_table[] = { |
| 197 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 |
| 198 | }; |
| 199 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 200 | struct bm_data { |
| 201 | struct fw_transaction t; |
| 202 | struct { |
| 203 | __be32 arg; |
| 204 | __be32 data; |
| 205 | } lock; |
| 206 | u32 old; |
| 207 | int rcode; |
| 208 | struct completion done; |
| 209 | }; |
| 210 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 211 | static void |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 212 | complete_bm_lock(struct fw_card *card, int rcode, |
| 213 | void *payload, size_t length, void *data) |
| 214 | { |
| 215 | struct bm_data *bmd = data; |
| 216 | |
| 217 | if (rcode == RCODE_COMPLETE) |
| 218 | bmd->old = be32_to_cpu(*(__be32 *) payload); |
| 219 | bmd->rcode = rcode; |
| 220 | complete(&bmd->done); |
| 221 | } |
| 222 | |
| 223 | static void |
| 224 | fw_card_bm_work(struct work_struct *work) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 225 | { |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 226 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 227 | struct fw_device *root; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 228 | struct bm_data bmd; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 229 | unsigned long flags; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 230 | int root_id, new_root_id, irm_id, gap_count, generation, grace; |
| 231 | int do_reset = 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 232 | |
| 233 | spin_lock_irqsave(&card->lock, flags); |
| 234 | |
| 235 | generation = card->generation; |
| 236 | root = card->root_node->data; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 237 | root_id = card->root_node->node_id; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 238 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10)); |
| 239 | |
| 240 | if (card->bm_generation + 1 == generation || |
| 241 | (card->bm_generation != generation && grace)) { |
| 242 | /* This first step is to figure out who is IRM and |
| 243 | * then try to become bus manager. If the IRM is not |
| 244 | * well defined (e.g. does not have an active link |
| 245 | * layer or does not responds to our lock request, we |
| 246 | * will have to do a little vigilante bus management. |
| 247 | * In that case, we do a goto into the gap count logic |
| 248 | * so that when we do the reset, we still optimize the |
| 249 | * gap count. That could well save a reset in the |
| 250 | * next generation. */ |
| 251 | |
| 252 | irm_id = card->irm_node->node_id; |
| 253 | if (!card->irm_node->link_on) { |
| 254 | new_root_id = card->local_node->node_id; |
| 255 | fw_notify("IRM has link off, making local node (%02x) root.\n", |
| 256 | new_root_id); |
| 257 | goto pick_me; |
| 258 | } |
| 259 | |
| 260 | bmd.lock.arg = cpu_to_be32(0x3f); |
| 261 | bmd.lock.data = cpu_to_be32(card->local_node->node_id); |
| 262 | |
| 263 | spin_unlock_irqrestore(&card->lock, flags); |
| 264 | |
| 265 | init_completion(&bmd.done); |
| 266 | fw_send_request(card, &bmd.t, TCODE_LOCK_COMPARE_SWAP, |
| 267 | irm_id, generation, |
| 268 | SCODE_100, CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, |
| 269 | &bmd.lock, sizeof bmd.lock, |
| 270 | complete_bm_lock, &bmd); |
| 271 | wait_for_completion(&bmd.done); |
| 272 | |
| 273 | if (bmd.rcode == RCODE_GENERATION) { |
| 274 | /* Another bus reset happened. Just return, |
| 275 | * the BM work has been rescheduled. */ |
| 276 | return; |
| 277 | } |
| 278 | |
| 279 | if (bmd.rcode == RCODE_COMPLETE && bmd.old != 0x3f) |
| 280 | /* Somebody else is BM, let them do the work. */ |
| 281 | return; |
| 282 | |
| 283 | spin_lock_irqsave(&card->lock, flags); |
| 284 | if (bmd.rcode != RCODE_COMPLETE) { |
| 285 | /* The lock request failed, maybe the IRM |
| 286 | * isn't really IRM capable after all. Let's |
| 287 | * do a bus reset and pick the local node as |
| 288 | * root, and thus, IRM. */ |
| 289 | new_root_id = card->local_node->node_id; |
| 290 | fw_notify("BM lock failed, making local node (%02x) root.\n", |
| 291 | new_root_id); |
| 292 | goto pick_me; |
| 293 | } |
| 294 | } else if (card->bm_generation != generation) { |
| 295 | /* OK, we weren't BM in the last generation, and it's |
| 296 | * less than 100ms since last bus reset. Reschedule |
| 297 | * this task 100ms from now. */ |
| 298 | spin_unlock_irqrestore(&card->lock, flags); |
| 299 | schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10)); |
| 300 | return; |
| 301 | } |
| 302 | |
| 303 | /* We're bus manager for this generation, so next step is to |
| 304 | * make sure we have an active cycle master and do gap count |
| 305 | * optimization. */ |
| 306 | card->bm_generation = generation; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 307 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 308 | if (root == NULL) { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 309 | /* Either link_on is false, or we failed to read the |
| 310 | * config rom. In either case, pick another root. */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 311 | new_root_id = card->local_node->node_id; |
Stefan Richter | 641f879 | 2007-01-27 10:34:55 +0100 | [diff] [blame] | 312 | } else if (atomic_read(&root->state) != FW_DEVICE_RUNNING) { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 313 | /* If we haven't probed this device yet, bail out now |
| 314 | * and let's try again once that's done. */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 315 | spin_unlock_irqrestore(&card->lock, flags); |
| 316 | return; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 317 | } else if (root->config_rom[2] & bib_cmc) { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 318 | /* FIXME: I suppose we should set the cmstr bit in the |
| 319 | * STATE_CLEAR register of this node, as described in |
| 320 | * 1394-1995, 8.4.2.6. Also, send out a force root |
| 321 | * packet for this node. */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 322 | new_root_id = root_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 323 | } else { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 324 | /* Current root has an active link layer and we |
| 325 | * successfully read the config rom, but it's not |
| 326 | * cycle master capable. */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 327 | new_root_id = card->local_node->node_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 328 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 329 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 330 | pick_me: |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 331 | /* Now figure out what gap count to set. */ |
| 332 | if (card->topology_type == FW_TOPOLOGY_A && |
| 333 | card->root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
| 334 | gap_count = gap_count_table[card->root_node->max_hops]; |
| 335 | else |
| 336 | gap_count = 63; |
| 337 | |
| 338 | /* Finally, figure out if we should do a reset or not. If we've |
| 339 | * done less that 5 resets with the same physical topology and we |
| 340 | * have either a new root or a new gap count setting, let's do it. */ |
| 341 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 342 | if (card->bm_retries++ < 5 && |
| 343 | (card->gap_count != gap_count || new_root_id != root_id)) |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 344 | do_reset = 1; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 345 | |
| 346 | spin_unlock_irqrestore(&card->lock, flags); |
| 347 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 348 | if (do_reset) { |
| 349 | fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 350 | card->index, new_root_id, gap_count); |
| 351 | fw_send_phy_config(card, new_root_id, generation, gap_count); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 352 | fw_core_initiate_bus_reset(card, 1); |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | static void |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 357 | flush_timer_callback(unsigned long data) |
| 358 | { |
| 359 | struct fw_card *card = (struct fw_card *)data; |
| 360 | |
| 361 | fw_flush_transactions(card); |
| 362 | } |
| 363 | |
| 364 | void |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 365 | fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 366 | struct device *device) |
| 367 | { |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 368 | static atomic_t index = ATOMIC_INIT(-1); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 369 | |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 370 | kref_init(&card->kref); |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 371 | card->index = atomic_inc_return(&index); |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 372 | card->driver = driver; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 373 | card->device = device; |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 374 | card->current_tlabel = 0; |
| 375 | card->tlabel_mask = 0; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 376 | card->color = 0; |
| 377 | |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 378 | INIT_LIST_HEAD(&card->transaction_list); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 379 | spin_lock_init(&card->lock); |
| 380 | setup_timer(&card->flush_timer, |
| 381 | flush_timer_callback, (unsigned long)card); |
| 382 | |
| 383 | card->local_node = NULL; |
| 384 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 385 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 386 | } |
| 387 | EXPORT_SYMBOL(fw_card_initialize); |
| 388 | |
| 389 | int |
| 390 | fw_card_add(struct fw_card *card, |
| 391 | u32 max_receive, u32 link_speed, u64 guid) |
| 392 | { |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 393 | u32 *config_rom; |
| 394 | size_t length; |
| 395 | |
| 396 | card->max_receive = max_receive; |
| 397 | card->link_speed = link_speed; |
| 398 | card->guid = guid; |
| 399 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 400 | /* Activate link_on bit and contender bit in our self ID packets.*/ |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 401 | if (card->driver->update_phy_reg(card, 4, 0, |
| 402 | PHY_LINK_ACTIVE | PHY_CONTENDER) < 0) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 403 | return -EIO; |
| 404 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 405 | /* The subsystem grabs a reference when the card is added and |
| 406 | * drops it when the driver calls fw_core_remove_card. */ |
| 407 | fw_card_get(card); |
| 408 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 409 | down_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 410 | config_rom = generate_config_rom (card, &length); |
| 411 | list_add_tail(&card->link, &card_list); |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 412 | up_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 413 | |
| 414 | return card->driver->enable(card, config_rom, length); |
| 415 | } |
| 416 | EXPORT_SYMBOL(fw_card_add); |
| 417 | |
| 418 | |
| 419 | /* The next few functions implements a dummy driver that use once a |
| 420 | * card driver shuts down an fw_card. This allows the driver to |
| 421 | * cleanly unload, as all IO to the card will be handled by the dummy |
| 422 | * driver instead of calling into the (possibly) unloaded module. The |
| 423 | * dummy driver just fails all IO. */ |
| 424 | |
| 425 | static int |
| 426 | dummy_enable(struct fw_card *card, u32 *config_rom, size_t length) |
| 427 | { |
| 428 | BUG(); |
| 429 | return -1; |
| 430 | } |
| 431 | |
| 432 | static int |
| 433 | dummy_update_phy_reg(struct fw_card *card, int address, |
| 434 | int clear_bits, int set_bits) |
| 435 | { |
| 436 | return -ENODEV; |
| 437 | } |
| 438 | |
| 439 | static int |
| 440 | dummy_set_config_rom(struct fw_card *card, |
| 441 | u32 *config_rom, size_t length) |
| 442 | { |
| 443 | /* We take the card out of card_list before setting the dummy |
| 444 | * driver, so this should never get called. */ |
| 445 | BUG(); |
| 446 | return -1; |
| 447 | } |
| 448 | |
| 449 | static void |
| 450 | dummy_send_request(struct fw_card *card, struct fw_packet *packet) |
| 451 | { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 452 | packet->callback(packet, card, -ENODEV); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | static void |
| 456 | dummy_send_response(struct fw_card *card, struct fw_packet *packet) |
| 457 | { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 458 | packet->callback(packet, card, -ENODEV); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | static int |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 462 | dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
| 463 | { |
| 464 | return -ENOENT; |
| 465 | } |
| 466 | |
| 467 | static int |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 468 | dummy_enable_phys_dma(struct fw_card *card, |
| 469 | int node_id, int generation) |
| 470 | { |
| 471 | return -ENODEV; |
| 472 | } |
| 473 | |
| 474 | static struct fw_card_driver dummy_driver = { |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 475 | .name = "dummy", |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 476 | .enable = dummy_enable, |
| 477 | .update_phy_reg = dummy_update_phy_reg, |
| 478 | .set_config_rom = dummy_set_config_rom, |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 479 | .send_request = dummy_send_request, |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 480 | .cancel_packet = dummy_cancel_packet, |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 481 | .send_response = dummy_send_response, |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 482 | .enable_phys_dma = dummy_enable_phys_dma, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 483 | }; |
| 484 | |
| 485 | void |
| 486 | fw_core_remove_card(struct fw_card *card) |
| 487 | { |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 488 | card->driver->update_phy_reg(card, 4, |
| 489 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 490 | fw_core_initiate_bus_reset(card, 1); |
| 491 | |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 492 | down_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 493 | list_del(&card->link); |
Kristian Høgsberg | dde2b95 | 2007-04-17 11:51:57 -0400 | [diff] [blame] | 494 | up_write(&card_rwsem); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 495 | |
| 496 | /* Set up the dummy driver. */ |
| 497 | card->driver = &dummy_driver; |
| 498 | |
| 499 | fw_flush_transactions(card); |
| 500 | |
| 501 | fw_destroy_nodes(card); |
| 502 | |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 503 | fw_card_put(card); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 504 | } |
| 505 | EXPORT_SYMBOL(fw_core_remove_card); |
| 506 | |
| 507 | struct fw_card * |
| 508 | fw_card_get(struct fw_card *card) |
| 509 | { |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 510 | kref_get(&card->kref); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 511 | |
| 512 | return card; |
| 513 | } |
| 514 | EXPORT_SYMBOL(fw_card_get); |
| 515 | |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 516 | static void |
| 517 | release_card(struct kref *kref) |
| 518 | { |
| 519 | struct fw_card *card = container_of(kref, struct fw_card, kref); |
| 520 | |
| 521 | kfree(card); |
| 522 | } |
| 523 | |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 524 | /* An assumption for fw_card_put() is that the card driver allocates |
| 525 | * the fw_card struct with kalloc and that it has been shut down |
| 526 | * before the last ref is dropped. */ |
| 527 | void |
| 528 | fw_card_put(struct fw_card *card) |
| 529 | { |
Kristian Høgsberg | 49e1179 | 2007-03-07 12:12:37 -0500 | [diff] [blame] | 530 | kref_put(&card->kref, release_card); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 531 | } |
| 532 | EXPORT_SYMBOL(fw_card_put); |
| 533 | |
| 534 | int |
| 535 | fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) |
| 536 | { |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 537 | int reg = short_reset ? 5 : 1; |
| 538 | /* The following values happen to be the same bit. However be |
| 539 | * explicit for clarity. */ |
| 540 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
| 541 | |
| 542 | return card->driver->update_phy_reg(card, reg, 0, bit); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 543 | } |
| 544 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |