Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Device probing and sysfs code. |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software Foundation, |
| 18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
Stefan Richter | d54423c | 2010-02-18 01:50:31 +0100 | [diff] [blame] | 21 | #include <linux/bug.h> |
Stefan Richter | 41f321c | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 22 | #include <linux/ctype.h> |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 23 | #include <linux/delay.h> |
Stefan Richter | 41f321c | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 24 | #include <linux/device.h> |
| 25 | #include <linux/errno.h> |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 26 | #include <linux/firewire.h> |
| 27 | #include <linux/firewire-constants.h> |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 28 | #include <linux/idr.h> |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 29 | #include <linux/jiffies.h> |
Stefan Richter | 41f321c | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 30 | #include <linux/kobject.h> |
| 31 | #include <linux/list.h> |
Stefan Richter | b3b2988 | 2009-02-15 23:12:34 +0100 | [diff] [blame] | 32 | #include <linux/mod_devicetable.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 33 | #include <linux/module.h> |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 34 | #include <linux/mutex.h> |
Matthew Wilcox | 6188e10 | 2008-04-18 22:21:05 -0400 | [diff] [blame] | 35 | #include <linux/rwsem.h> |
| 36 | #include <linux/semaphore.h> |
Jay Fenlason | cf417e54 | 2008-10-03 11:19:09 -0400 | [diff] [blame] | 37 | #include <linux/spinlock.h> |
Stefan Richter | 41f321c | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 38 | #include <linux/string.h> |
| 39 | #include <linux/workqueue.h> |
| 40 | |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 41 | #include <asm/atomic.h> |
| 42 | #include <asm/byteorder.h> |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 43 | #include <asm/system.h> |
Stefan Richter | 41f321c | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 44 | |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 45 | #include "core.h" |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 46 | |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 47 | void fw_csr_iterator_init(struct fw_csr_iterator *ci, const u32 *p) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 48 | { |
| 49 | ci->p = p + 1; |
| 50 | ci->end = ci->p + (p[0] >> 16); |
| 51 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 52 | EXPORT_SYMBOL(fw_csr_iterator_init); |
| 53 | |
| 54 | int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value) |
| 55 | { |
| 56 | *key = *ci->p >> 24; |
| 57 | *value = *ci->p & 0xffffff; |
| 58 | |
| 59 | return ci->p++ < ci->end; |
| 60 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 61 | EXPORT_SYMBOL(fw_csr_iterator_next); |
| 62 | |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 63 | static const u32 *search_leaf(const u32 *directory, int search_key) |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 64 | { |
| 65 | struct fw_csr_iterator ci; |
| 66 | int last_key = 0, key, value; |
| 67 | |
| 68 | fw_csr_iterator_init(&ci, directory); |
| 69 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 70 | if (last_key == search_key && |
| 71 | key == (CSR_DESCRIPTOR | CSR_LEAF)) |
| 72 | return ci.p - 1 + value; |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 73 | |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 74 | last_key = key; |
| 75 | } |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 76 | |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 77 | return NULL; |
| 78 | } |
| 79 | |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 80 | static int textual_leaf_to_string(const u32 *block, char *buf, size_t size) |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 81 | { |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 82 | unsigned int quadlets, i; |
| 83 | char c; |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 84 | |
| 85 | if (!size || !buf) |
| 86 | return -EINVAL; |
| 87 | |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 88 | quadlets = min(block[0] >> 16, 256U); |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 89 | if (quadlets < 2) |
| 90 | return -ENODATA; |
| 91 | |
| 92 | if (block[1] != 0 || block[2] != 0) |
| 93 | /* unknown language/character set */ |
| 94 | return -ENODATA; |
| 95 | |
| 96 | block += 3; |
| 97 | quadlets -= 2; |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 98 | for (i = 0; i < quadlets * 4 && i < size - 1; i++) { |
| 99 | c = block[i / 4] >> (24 - 8 * (i % 4)); |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 100 | if (c == '\0') |
| 101 | break; |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 102 | buf[i] = c; |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 103 | } |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 104 | buf[i] = '\0'; |
| 105 | |
| 106 | return i; |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | /** |
| 110 | * fw_csr_string - reads a string from the configuration ROM |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 111 | * @directory: e.g. root directory or unit directory |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 112 | * @key: the key of the preceding directory entry |
| 113 | * @buf: where to put the string |
| 114 | * @size: size of @buf, in bytes |
| 115 | * |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 116 | * The string is taken from a minimal ASCII text descriptor leaf after |
| 117 | * the immediate entry with @key. The string is zero-terminated. |
| 118 | * Returns strlen(buf) or a negative error code. |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 119 | */ |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 120 | int fw_csr_string(const u32 *directory, int key, char *buf, size_t size) |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 121 | { |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 122 | const u32 *leaf = search_leaf(directory, key); |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 123 | if (!leaf) |
| 124 | return -ENOENT; |
Stefan Richter | 3c2c58c | 2009-12-26 01:43:21 +0100 | [diff] [blame] | 125 | |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 126 | return textual_leaf_to_string(leaf, buf, size); |
| 127 | } |
| 128 | EXPORT_SYMBOL(fw_csr_string); |
| 129 | |
Stefan Richter | 099d541 | 2009-06-06 18:37:25 +0200 | [diff] [blame] | 130 | static bool is_fw_unit(struct device *dev); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 131 | |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 132 | static int match_unit_directory(const u32 *directory, u32 match_flags, |
Stefan Richter | b3b2988 | 2009-02-15 23:12:34 +0100 | [diff] [blame] | 133 | const struct ieee1394_device_id *id) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 134 | { |
| 135 | struct fw_csr_iterator ci; |
| 136 | int key, value, match; |
| 137 | |
| 138 | match = 0; |
| 139 | fw_csr_iterator_init(&ci, directory); |
| 140 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
Stefan Richter | b3b2988 | 2009-02-15 23:12:34 +0100 | [diff] [blame] | 141 | if (key == CSR_VENDOR && value == id->vendor_id) |
| 142 | match |= IEEE1394_MATCH_VENDOR_ID; |
| 143 | if (key == CSR_MODEL && value == id->model_id) |
| 144 | match |= IEEE1394_MATCH_MODEL_ID; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 145 | if (key == CSR_SPECIFIER_ID && value == id->specifier_id) |
Stefan Richter | b3b2988 | 2009-02-15 23:12:34 +0100 | [diff] [blame] | 146 | match |= IEEE1394_MATCH_SPECIFIER_ID; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 147 | if (key == CSR_VERSION && value == id->version) |
Stefan Richter | b3b2988 | 2009-02-15 23:12:34 +0100 | [diff] [blame] | 148 | match |= IEEE1394_MATCH_VERSION; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 149 | } |
| 150 | |
Stefan Richter | e41f8d7 | 2009-02-16 00:22:05 +0100 | [diff] [blame] | 151 | return (match & match_flags) == match_flags; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | static int fw_unit_match(struct device *dev, struct device_driver *drv) |
| 155 | { |
| 156 | struct fw_unit *unit = fw_unit(dev); |
Stefan Richter | e41f8d7 | 2009-02-16 00:22:05 +0100 | [diff] [blame] | 157 | struct fw_device *device; |
| 158 | const struct ieee1394_device_id *id; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 159 | |
| 160 | /* We only allow binding to fw_units. */ |
| 161 | if (!is_fw_unit(dev)) |
| 162 | return 0; |
| 163 | |
Stefan Richter | e5110d0 | 2009-06-06 18:35:27 +0200 | [diff] [blame] | 164 | device = fw_parent_device(unit); |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 165 | id = container_of(drv, struct fw_driver, driver)->id_table; |
Stefan Richter | e41f8d7 | 2009-02-16 00:22:05 +0100 | [diff] [blame] | 166 | |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 167 | for (; id->match_flags != 0; id++) { |
Stefan Richter | e41f8d7 | 2009-02-16 00:22:05 +0100 | [diff] [blame] | 168 | if (match_unit_directory(unit->directory, id->match_flags, id)) |
| 169 | return 1; |
| 170 | |
| 171 | /* Also check vendor ID in the root directory. */ |
| 172 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && |
| 173 | match_unit_directory(&device->config_rom[5], |
| 174 | IEEE1394_MATCH_VENDOR_ID, id) && |
| 175 | match_unit_directory(unit->directory, id->match_flags |
| 176 | & ~IEEE1394_MATCH_VENDOR_ID, id)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 177 | return 1; |
| 178 | } |
| 179 | |
| 180 | return 0; |
| 181 | } |
| 182 | |
Stefan Richter | 5ae7351 | 2010-03-19 00:38:29 +0100 | [diff] [blame^] | 183 | static void get_modalias_ids(const u32 *directory, int *id) |
| 184 | { |
| 185 | struct fw_csr_iterator ci; |
| 186 | int key, value; |
| 187 | |
| 188 | fw_csr_iterator_init(&ci, directory); |
| 189 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 190 | switch (key) { |
| 191 | case CSR_VENDOR: id[0] = value; break; |
| 192 | case CSR_MODEL: id[1] = value; break; |
| 193 | case CSR_SPECIFIER_ID: id[2] = value; break; |
| 194 | case CSR_VERSION: id[3] = value; break; |
| 195 | } |
| 196 | } |
| 197 | } |
| 198 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 199 | static int get_modalias(struct fw_unit *unit, char *buffer, size_t buffer_size) |
| 200 | { |
Stefan Richter | 5ae7351 | 2010-03-19 00:38:29 +0100 | [diff] [blame^] | 201 | int id[] = {0, 0, 0, 0}; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 202 | |
Stefan Richter | 5ae7351 | 2010-03-19 00:38:29 +0100 | [diff] [blame^] | 203 | get_modalias_ids(&fw_parent_device(unit)->config_rom[5], id); |
| 204 | get_modalias_ids(unit->directory, id); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 205 | |
| 206 | return snprintf(buffer, buffer_size, |
| 207 | "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", |
Stefan Richter | 5ae7351 | 2010-03-19 00:38:29 +0100 | [diff] [blame^] | 208 | id[0], id[1], id[2], id[3]); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 209 | } |
| 210 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 211 | static int fw_unit_uevent(struct device *dev, struct kobj_uevent_env *env) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 212 | { |
| 213 | struct fw_unit *unit = fw_unit(dev); |
| 214 | char modalias[64]; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 215 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 216 | get_modalias(unit, modalias, sizeof(modalias)); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 217 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 218 | if (add_uevent_var(env, "MODALIAS=%s", modalias)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 219 | return -ENOMEM; |
| 220 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | struct bus_type fw_bus_type = { |
Kristian Høgsberg | 362c2c8 | 2007-02-06 14:49:37 -0500 | [diff] [blame] | 225 | .name = "firewire", |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 226 | .match = fw_unit_match, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 227 | }; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 228 | EXPORT_SYMBOL(fw_bus_type); |
| 229 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 230 | int fw_device_enable_phys_dma(struct fw_device *device) |
| 231 | { |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 232 | int generation = device->generation; |
| 233 | |
| 234 | /* device->node_id, accessed below, must not be older than generation */ |
| 235 | smp_rmb(); |
| 236 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 237 | return device->card->driver->enable_phys_dma(device->card, |
| 238 | device->node_id, |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 239 | generation); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 240 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 241 | EXPORT_SYMBOL(fw_device_enable_phys_dma); |
| 242 | |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 243 | struct config_rom_attribute { |
| 244 | struct device_attribute attr; |
| 245 | u32 key; |
| 246 | }; |
| 247 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 248 | static ssize_t show_immediate(struct device *dev, |
| 249 | struct device_attribute *dattr, char *buf) |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 250 | { |
| 251 | struct config_rom_attribute *attr = |
| 252 | container_of(dattr, struct config_rom_attribute, attr); |
| 253 | struct fw_csr_iterator ci; |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 254 | const u32 *dir; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 255 | int key, value, ret = -ENOENT; |
| 256 | |
| 257 | down_read(&fw_device_rwsem); |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 258 | |
| 259 | if (is_fw_unit(dev)) |
| 260 | dir = fw_unit(dev)->directory; |
| 261 | else |
| 262 | dir = fw_device(dev)->config_rom + 5; |
| 263 | |
| 264 | fw_csr_iterator_init(&ci, dir); |
| 265 | while (fw_csr_iterator_next(&ci, &key, &value)) |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 266 | if (attr->key == key) { |
| 267 | ret = snprintf(buf, buf ? PAGE_SIZE : 0, |
| 268 | "0x%06x\n", value); |
| 269 | break; |
| 270 | } |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 271 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 272 | up_read(&fw_device_rwsem); |
| 273 | |
| 274 | return ret; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | #define IMMEDIATE_ATTR(name, key) \ |
| 278 | { __ATTR(name, S_IRUGO, show_immediate, NULL), key } |
| 279 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 280 | static ssize_t show_text_leaf(struct device *dev, |
| 281 | struct device_attribute *dattr, char *buf) |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 282 | { |
| 283 | struct config_rom_attribute *attr = |
| 284 | container_of(dattr, struct config_rom_attribute, attr); |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 285 | const u32 *dir; |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 286 | size_t bufsize; |
| 287 | char dummy_buf[2]; |
| 288 | int ret; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 289 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 290 | down_read(&fw_device_rwsem); |
| 291 | |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 292 | if (is_fw_unit(dev)) |
| 293 | dir = fw_unit(dev)->directory; |
| 294 | else |
| 295 | dir = fw_device(dev)->config_rom + 5; |
| 296 | |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 297 | if (buf) { |
| 298 | bufsize = PAGE_SIZE - 1; |
| 299 | } else { |
| 300 | buf = dummy_buf; |
| 301 | bufsize = 1; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 302 | } |
| 303 | |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 304 | ret = fw_csr_string(dir, attr->key, buf, bufsize); |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 305 | |
Clemens Ladisch | 1f8fef7 | 2009-12-24 11:59:57 +0100 | [diff] [blame] | 306 | if (ret >= 0) { |
| 307 | /* Strip trailing whitespace and add newline. */ |
| 308 | while (ret > 0 && isspace(buf[ret - 1])) |
| 309 | ret--; |
| 310 | strcpy(buf + ret, "\n"); |
| 311 | ret++; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 312 | } |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 313 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 314 | up_read(&fw_device_rwsem); |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 315 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 316 | return ret; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | #define TEXT_LEAF_ATTR(name, key) \ |
| 320 | { __ATTR(name, S_IRUGO, show_text_leaf, NULL), key } |
| 321 | |
| 322 | static struct config_rom_attribute config_rom_attributes[] = { |
| 323 | IMMEDIATE_ATTR(vendor, CSR_VENDOR), |
| 324 | IMMEDIATE_ATTR(hardware_version, CSR_HARDWARE_VERSION), |
| 325 | IMMEDIATE_ATTR(specifier_id, CSR_SPECIFIER_ID), |
| 326 | IMMEDIATE_ATTR(version, CSR_VERSION), |
| 327 | IMMEDIATE_ATTR(model, CSR_MODEL), |
| 328 | TEXT_LEAF_ATTR(vendor_name, CSR_VENDOR), |
| 329 | TEXT_LEAF_ATTR(model_name, CSR_MODEL), |
| 330 | TEXT_LEAF_ATTR(hardware_version_name, CSR_HARDWARE_VERSION), |
| 331 | }; |
| 332 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 333 | static void init_fw_attribute_group(struct device *dev, |
| 334 | struct device_attribute *attrs, |
| 335 | struct fw_attribute_group *group) |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 336 | { |
| 337 | struct device_attribute *attr; |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 338 | int i, j; |
| 339 | |
| 340 | for (j = 0; attrs[j].attr.name != NULL; j++) |
| 341 | group->attrs[j] = &attrs[j].attr; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 342 | |
| 343 | for (i = 0; i < ARRAY_SIZE(config_rom_attributes); i++) { |
| 344 | attr = &config_rom_attributes[i].attr; |
| 345 | if (attr->show(dev, attr, NULL) < 0) |
| 346 | continue; |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 347 | group->attrs[j++] = &attr->attr; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 348 | } |
| 349 | |
Stefan Richter | e5333db | 2009-05-22 23:16:27 +0200 | [diff] [blame] | 350 | group->attrs[j] = NULL; |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 351 | group->groups[0] = &group->group; |
| 352 | group->groups[1] = NULL; |
| 353 | group->group.attrs = group->attrs; |
David Brownell | a4dbd67 | 2009-06-24 10:06:31 -0700 | [diff] [blame] | 354 | dev->groups = (const struct attribute_group **) group->groups; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 355 | } |
| 356 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 357 | static ssize_t modalias_show(struct device *dev, |
| 358 | struct device_attribute *attr, char *buf) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 359 | { |
| 360 | struct fw_unit *unit = fw_unit(dev); |
| 361 | int length; |
| 362 | |
| 363 | length = get_modalias(unit, buf, PAGE_SIZE); |
| 364 | strcpy(buf + length, "\n"); |
| 365 | |
| 366 | return length + 1; |
| 367 | } |
| 368 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 369 | static ssize_t rom_index_show(struct device *dev, |
| 370 | struct device_attribute *attr, char *buf) |
Kristian Høgsberg | 048961e | 2007-03-07 12:12:46 -0500 | [diff] [blame] | 371 | { |
| 372 | struct fw_device *device = fw_device(dev->parent); |
| 373 | struct fw_unit *unit = fw_unit(dev); |
| 374 | |
| 375 | return snprintf(buf, PAGE_SIZE, "%d\n", |
Stefan Richter | d84702a | 2007-03-20 19:42:15 +0100 | [diff] [blame] | 376 | (int)(unit->directory - device->config_rom)); |
Kristian Høgsberg | 048961e | 2007-03-07 12:12:46 -0500 | [diff] [blame] | 377 | } |
| 378 | |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 379 | static struct device_attribute fw_unit_attributes[] = { |
| 380 | __ATTR_RO(modalias), |
| 381 | __ATTR_RO(rom_index), |
| 382 | __ATTR_NULL, |
| 383 | }; |
| 384 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 385 | static ssize_t config_rom_show(struct device *dev, |
| 386 | struct device_attribute *attr, char *buf) |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 387 | { |
| 388 | struct fw_device *device = fw_device(dev); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 389 | size_t length; |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 390 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 391 | down_read(&fw_device_rwsem); |
| 392 | length = device->config_rom_length * 4; |
| 393 | memcpy(buf, device->config_rom, length); |
| 394 | up_read(&fw_device_rwsem); |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 395 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 396 | return length; |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 397 | } |
| 398 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 399 | static ssize_t guid_show(struct device *dev, |
| 400 | struct device_attribute *attr, char *buf) |
Kristian Høgsberg | bbd1494 | 2007-03-20 20:58:35 -0400 | [diff] [blame] | 401 | { |
| 402 | struct fw_device *device = fw_device(dev); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 403 | int ret; |
Kristian Høgsberg | bbd1494 | 2007-03-20 20:58:35 -0400 | [diff] [blame] | 404 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 405 | down_read(&fw_device_rwsem); |
| 406 | ret = snprintf(buf, PAGE_SIZE, "0x%08x%08x\n", |
| 407 | device->config_rom[3], device->config_rom[4]); |
| 408 | up_read(&fw_device_rwsem); |
| 409 | |
| 410 | return ret; |
Kristian Høgsberg | bbd1494 | 2007-03-20 20:58:35 -0400 | [diff] [blame] | 411 | } |
| 412 | |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 413 | static int units_sprintf(char *buf, const u32 *directory) |
Stefan Richter | 0210b66 | 2009-05-23 00:03:29 +0200 | [diff] [blame] | 414 | { |
| 415 | struct fw_csr_iterator ci; |
| 416 | int key, value; |
| 417 | int specifier_id = 0; |
| 418 | int version = 0; |
| 419 | |
| 420 | fw_csr_iterator_init(&ci, directory); |
| 421 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 422 | switch (key) { |
| 423 | case CSR_SPECIFIER_ID: |
| 424 | specifier_id = value; |
| 425 | break; |
| 426 | case CSR_VERSION: |
| 427 | version = value; |
| 428 | break; |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | return sprintf(buf, "0x%06x:0x%06x ", specifier_id, version); |
| 433 | } |
| 434 | |
| 435 | static ssize_t units_show(struct device *dev, |
| 436 | struct device_attribute *attr, char *buf) |
| 437 | { |
| 438 | struct fw_device *device = fw_device(dev); |
| 439 | struct fw_csr_iterator ci; |
| 440 | int key, value, i = 0; |
| 441 | |
| 442 | down_read(&fw_device_rwsem); |
| 443 | fw_csr_iterator_init(&ci, &device->config_rom[5]); |
| 444 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 445 | if (key != (CSR_UNIT | CSR_DIRECTORY)) |
| 446 | continue; |
| 447 | i += units_sprintf(&buf[i], ci.p + value - 1); |
| 448 | if (i >= PAGE_SIZE - (8 + 1 + 8 + 1)) |
| 449 | break; |
| 450 | } |
| 451 | up_read(&fw_device_rwsem); |
| 452 | |
| 453 | if (i) |
| 454 | buf[i - 1] = '\n'; |
| 455 | |
| 456 | return i; |
| 457 | } |
| 458 | |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 459 | static struct device_attribute fw_device_attributes[] = { |
| 460 | __ATTR_RO(config_rom), |
Kristian Høgsberg | bbd1494 | 2007-03-20 20:58:35 -0400 | [diff] [blame] | 461 | __ATTR_RO(guid), |
Stefan Richter | 0210b66 | 2009-05-23 00:03:29 +0200 | [diff] [blame] | 462 | __ATTR_RO(units), |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 463 | __ATTR_NULL, |
Kristian Høgsberg | 048961e | 2007-03-07 12:12:46 -0500 | [diff] [blame] | 464 | }; |
| 465 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 466 | static int read_rom(struct fw_device *device, |
| 467 | int generation, int index, u32 *data) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 468 | { |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 469 | int rcode; |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 470 | |
| 471 | /* device->node_id, accessed below, must not be older than generation */ |
| 472 | smp_rmb(); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 473 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 474 | rcode = fw_run_transaction(device->card, TCODE_READ_QUADLET_REQUEST, |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 475 | device->node_id, generation, device->max_speed, |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 476 | (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + index * 4, |
| 477 | data, 4); |
| 478 | be32_to_cpus(data); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 479 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 480 | return rcode; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 481 | } |
| 482 | |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 483 | #define MAX_CONFIG_ROM_SIZE 256 |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 484 | |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 485 | /* |
| 486 | * Read the bus info block, perform a speed probe, and read all of the rest of |
| 487 | * the config ROM. We do all this with a cached bus generation. If the bus |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 488 | * generation changes under us, read_config_rom will fail and get retried. |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 489 | * It's better to start all over in this case because the node from which we |
| 490 | * are reading the ROM may have changed the ROM during the reset. |
| 491 | */ |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 492 | static int read_config_rom(struct fw_device *device, int generation) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 493 | { |
Stefan Richter | 13b302d | 2009-12-26 01:44:10 +0100 | [diff] [blame] | 494 | const u32 *old_rom, *new_rom; |
| 495 | u32 *rom, *stack; |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 496 | u32 sp, key; |
| 497 | int i, end, length, ret = -1; |
| 498 | |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 499 | rom = kmalloc(sizeof(*rom) * MAX_CONFIG_ROM_SIZE + |
| 500 | sizeof(*stack) * MAX_CONFIG_ROM_SIZE, GFP_KERNEL); |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 501 | if (rom == NULL) |
| 502 | return -ENOMEM; |
| 503 | |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 504 | stack = &rom[MAX_CONFIG_ROM_SIZE]; |
| 505 | memset(rom, 0, sizeof(*rom) * MAX_CONFIG_ROM_SIZE); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 506 | |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 507 | device->max_speed = SCODE_100; |
| 508 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 509 | /* First read the bus info block. */ |
| 510 | for (i = 0; i < 5; i++) { |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 511 | if (read_rom(device, generation, i, &rom[i]) != RCODE_COMPLETE) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 512 | goto out; |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 513 | /* |
| 514 | * As per IEEE1212 7.2, during power-up, devices can |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 515 | * reply with a 0 for the first quadlet of the config |
| 516 | * rom to indicate that they are booting (for example, |
| 517 | * if the firmware is on the disk of a external |
| 518 | * harddisk). In that case we just fail, and the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 519 | * retry mechanism will try again later. |
| 520 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 521 | if (i == 0 && rom[i] == 0) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 522 | goto out; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 523 | } |
| 524 | |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 525 | device->max_speed = device->node->max_speed; |
| 526 | |
| 527 | /* |
| 528 | * Determine the speed of |
| 529 | * - devices with link speed less than PHY speed, |
| 530 | * - devices with 1394b PHY (unless only connected to 1394a PHYs), |
| 531 | * - all devices if there are 1394b repeaters. |
| 532 | * Note, we cannot use the bus info block's link_spd as starting point |
| 533 | * because some buggy firmwares set it lower than necessary and because |
| 534 | * 1394-1995 nodes do not have the field. |
| 535 | */ |
| 536 | if ((rom[2] & 0x7) < device->max_speed || |
| 537 | device->max_speed == SCODE_BETA || |
| 538 | device->card->beta_repeaters_present) { |
| 539 | u32 dummy; |
| 540 | |
| 541 | /* for S1600 and S3200 */ |
| 542 | if (device->max_speed == SCODE_BETA) |
| 543 | device->max_speed = device->card->link_speed; |
| 544 | |
| 545 | while (device->max_speed > SCODE_100) { |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 546 | if (read_rom(device, generation, 0, &dummy) == |
| 547 | RCODE_COMPLETE) |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 548 | break; |
| 549 | device->max_speed--; |
| 550 | } |
| 551 | } |
| 552 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 553 | /* |
| 554 | * Now parse the config rom. The config rom is a recursive |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 555 | * directory structure so we parse it using a stack of |
| 556 | * references to the blocks that make up the structure. We |
| 557 | * push a reference to the root directory on the stack to |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 558 | * start things off. |
| 559 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 560 | length = i; |
| 561 | sp = 0; |
| 562 | stack[sp++] = 0xc0000005; |
| 563 | while (sp > 0) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 564 | /* |
| 565 | * Pop the next block reference of the stack. The |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 566 | * lower 24 bits is the offset into the config rom, |
| 567 | * the upper 8 bits are the type of the reference the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 568 | * block. |
| 569 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 570 | key = stack[--sp]; |
| 571 | i = key & 0xffffff; |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 572 | if (WARN_ON(i >= MAX_CONFIG_ROM_SIZE)) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 573 | goto out; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 574 | |
| 575 | /* Read header quadlet for the block to get the length. */ |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 576 | if (read_rom(device, generation, i, &rom[i]) != RCODE_COMPLETE) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 577 | goto out; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 578 | end = i + (rom[i] >> 16) + 1; |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 579 | if (end > MAX_CONFIG_ROM_SIZE) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 580 | /* |
Stefan Richter | 2799d5c | 2010-02-18 01:52:45 +0100 | [diff] [blame] | 581 | * This block extends outside the config ROM which is |
| 582 | * a firmware bug. Ignore this whole block, i.e. |
| 583 | * simply set a fake block length of 0. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 584 | */ |
Stefan Richter | 2799d5c | 2010-02-18 01:52:45 +0100 | [diff] [blame] | 585 | fw_error("skipped invalid ROM block %x at %llx\n", |
| 586 | rom[i], |
| 587 | i * 4 | CSR_REGISTER_BASE | CSR_CONFIG_ROM); |
| 588 | rom[i] = 0; |
| 589 | end = i; |
| 590 | } |
| 591 | i++; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 592 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 593 | /* |
| 594 | * Now read in the block. If this is a directory |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 595 | * block, check the entries as we read them to see if |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 596 | * it references another block, and push it in that case. |
| 597 | */ |
Stefan Richter | d54423c | 2010-02-18 01:50:31 +0100 | [diff] [blame] | 598 | for (; i < end; i++) { |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 599 | if (read_rom(device, generation, i, &rom[i]) != |
| 600 | RCODE_COMPLETE) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 601 | goto out; |
Stefan Richter | d54423c | 2010-02-18 01:50:31 +0100 | [diff] [blame] | 602 | |
Stefan Richter | 58aaa54 | 2010-02-18 01:54:00 +0100 | [diff] [blame] | 603 | if ((key >> 30) != 3 || (rom[i] >> 30) < 2) |
Stefan Richter | d54423c | 2010-02-18 01:50:31 +0100 | [diff] [blame] | 604 | continue; |
| 605 | /* |
| 606 | * Offset points outside the ROM. May be a firmware |
| 607 | * bug or an Extended ROM entry (IEEE 1212-2001 clause |
| 608 | * 7.7.18). Simply overwrite this pointer here by a |
| 609 | * fake immediate entry so that later iterators over |
| 610 | * the ROM don't have to check offsets all the time. |
| 611 | */ |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 612 | if (i + (rom[i] & 0xffffff) >= MAX_CONFIG_ROM_SIZE) { |
Stefan Richter | d54423c | 2010-02-18 01:50:31 +0100 | [diff] [blame] | 613 | fw_error("skipped unsupported ROM entry %x at %llx\n", |
| 614 | rom[i], |
| 615 | i * 4 | CSR_REGISTER_BASE | CSR_CONFIG_ROM); |
| 616 | rom[i] = 0; |
| 617 | continue; |
| 618 | } |
| 619 | stack[sp++] = i + rom[i]; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 620 | } |
| 621 | if (length < i) |
| 622 | length = i; |
| 623 | } |
| 624 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 625 | old_rom = device->config_rom; |
| 626 | new_rom = kmemdup(rom, length * 4, GFP_KERNEL); |
| 627 | if (new_rom == NULL) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 628 | goto out; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 629 | |
| 630 | down_write(&fw_device_rwsem); |
| 631 | device->config_rom = new_rom; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 632 | device->config_rom_length = length; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 633 | up_write(&fw_device_rwsem); |
| 634 | |
| 635 | kfree(old_rom); |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 636 | ret = 0; |
Stefan Richter | 837ec78 | 2009-06-09 23:56:55 +0200 | [diff] [blame] | 637 | device->max_rec = rom[2] >> 12 & 0xf; |
| 638 | device->cmc = rom[2] >> 30 & 1; |
| 639 | device->irmc = rom[2] >> 31 & 1; |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 640 | out: |
| 641 | kfree(rom); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 642 | |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 643 | return ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 644 | } |
| 645 | |
| 646 | static void fw_unit_release(struct device *dev) |
| 647 | { |
| 648 | struct fw_unit *unit = fw_unit(dev); |
| 649 | |
| 650 | kfree(unit); |
| 651 | } |
| 652 | |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 653 | static struct device_type fw_unit_type = { |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 654 | .uevent = fw_unit_uevent, |
| 655 | .release = fw_unit_release, |
| 656 | }; |
| 657 | |
Stefan Richter | 099d541 | 2009-06-06 18:37:25 +0200 | [diff] [blame] | 658 | static bool is_fw_unit(struct device *dev) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 659 | { |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 660 | return dev->type == &fw_unit_type; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | static void create_units(struct fw_device *device) |
| 664 | { |
| 665 | struct fw_csr_iterator ci; |
| 666 | struct fw_unit *unit; |
| 667 | int key, value, i; |
| 668 | |
| 669 | i = 0; |
| 670 | fw_csr_iterator_init(&ci, &device->config_rom[5]); |
| 671 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 672 | if (key != (CSR_UNIT | CSR_DIRECTORY)) |
| 673 | continue; |
| 674 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 675 | /* |
| 676 | * Get the address of the unit directory and try to |
| 677 | * match the drivers id_tables against it. |
| 678 | */ |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 679 | unit = kzalloc(sizeof(*unit), GFP_KERNEL); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 680 | if (unit == NULL) { |
| 681 | fw_error("failed to allocate memory for unit\n"); |
| 682 | continue; |
| 683 | } |
| 684 | |
| 685 | unit->directory = ci.p + value - 1; |
| 686 | unit->device.bus = &fw_bus_type; |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 687 | unit->device.type = &fw_unit_type; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 688 | unit->device.parent = &device->device; |
Kay Sievers | a1f6481 | 2008-10-30 01:41:56 +0100 | [diff] [blame] | 689 | dev_set_name(&unit->device, "%s.%d", dev_name(&device->device), i++); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 690 | |
Stefan Richter | e5333db | 2009-05-22 23:16:27 +0200 | [diff] [blame] | 691 | BUILD_BUG_ON(ARRAY_SIZE(unit->attribute_group.attrs) < |
| 692 | ARRAY_SIZE(fw_unit_attributes) + |
| 693 | ARRAY_SIZE(config_rom_attributes)); |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 694 | init_fw_attribute_group(&unit->device, |
| 695 | fw_unit_attributes, |
| 696 | &unit->attribute_group); |
Stefan Richter | e5333db | 2009-05-22 23:16:27 +0200 | [diff] [blame] | 697 | |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 698 | if (device_register(&unit->device) < 0) |
| 699 | goto skip_unit; |
| 700 | |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 701 | continue; |
| 702 | |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 703 | skip_unit: |
| 704 | kfree(unit); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 705 | } |
| 706 | } |
| 707 | |
| 708 | static int shutdown_unit(struct device *device, void *data) |
| 709 | { |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 710 | device_unregister(device); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 711 | |
| 712 | return 0; |
| 713 | } |
| 714 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 715 | /* |
| 716 | * fw_device_rwsem acts as dual purpose mutex: |
| 717 | * - serializes accesses to fw_device_idr, |
| 718 | * - serializes accesses to fw_device.config_rom/.config_rom_length and |
| 719 | * fw_unit.directory, unless those accesses happen at safe occasions |
| 720 | */ |
| 721 | DECLARE_RWSEM(fw_device_rwsem); |
| 722 | |
Stefan Richter | d6053e0 | 2008-11-24 20:40:00 +0100 | [diff] [blame] | 723 | DEFINE_IDR(fw_device_idr); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 724 | int fw_cdev_major; |
| 725 | |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 726 | struct fw_device *fw_device_get_by_devt(dev_t devt) |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 727 | { |
| 728 | struct fw_device *device; |
| 729 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 730 | down_read(&fw_device_rwsem); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 731 | device = idr_find(&fw_device_idr, MINOR(devt)); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 732 | if (device) |
| 733 | fw_device_get(device); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 734 | up_read(&fw_device_rwsem); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 735 | |
| 736 | return device; |
| 737 | } |
| 738 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 739 | /* |
| 740 | * These defines control the retry behavior for reading the config |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 741 | * rom. It shouldn't be necessary to tweak these; if the device |
| 742 | * doesn't respond to a config rom read within 10 seconds, it's not |
| 743 | * going to respond at all. As for the initial delay, a lot of |
| 744 | * devices will be able to respond within half a second after bus |
| 745 | * reset. On the other hand, it's not really worth being more |
| 746 | * aggressive than that, since it scales pretty well; if 10 devices |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 747 | * are plugged in, they're all getting read within one second. |
| 748 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 749 | |
Kristian Høgsberg | c5dfd0a | 2007-03-27 01:43:43 -0400 | [diff] [blame] | 750 | #define MAX_RETRIES 10 |
| 751 | #define RETRY_DELAY (3 * HZ) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 752 | #define INITIAL_DELAY (HZ / 2) |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 753 | #define SHUTDOWN_DELAY (2 * HZ) |
| 754 | |
| 755 | static void fw_device_shutdown(struct work_struct *work) |
| 756 | { |
| 757 | struct fw_device *device = |
| 758 | container_of(work, struct fw_device, work.work); |
| 759 | int minor = MINOR(device->device.devt); |
| 760 | |
Stefan Richter | e747a5c | 2009-01-24 20:35:38 +0100 | [diff] [blame] | 761 | if (time_is_after_jiffies(device->card->reset_jiffies + SHUTDOWN_DELAY) |
| 762 | && !list_empty(&device->card->link)) { |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 763 | schedule_delayed_work(&device->work, SHUTDOWN_DELAY); |
| 764 | return; |
| 765 | } |
| 766 | |
| 767 | if (atomic_cmpxchg(&device->state, |
| 768 | FW_DEVICE_GONE, |
| 769 | FW_DEVICE_SHUTDOWN) != FW_DEVICE_GONE) |
| 770 | return; |
| 771 | |
| 772 | fw_device_cdev_remove(device); |
| 773 | device_for_each_child(&device->device, NULL, shutdown_unit); |
| 774 | device_unregister(&device->device); |
| 775 | |
| 776 | down_write(&fw_device_rwsem); |
| 777 | idr_remove(&fw_device_idr, minor); |
| 778 | up_write(&fw_device_rwsem); |
| 779 | |
| 780 | fw_device_put(device); |
| 781 | } |
| 782 | |
Stefan Richter | aed8089 | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 783 | static void fw_device_release(struct device *dev) |
| 784 | { |
| 785 | struct fw_device *device = fw_device(dev); |
| 786 | struct fw_card *card = device->card; |
| 787 | unsigned long flags; |
| 788 | |
| 789 | /* |
| 790 | * Take the card lock so we don't set this to NULL while a |
| 791 | * FW_NODE_UPDATED callback is being handled or while the |
| 792 | * bus manager work looks at this node. |
| 793 | */ |
| 794 | spin_lock_irqsave(&card->lock, flags); |
| 795 | device->node->data = NULL; |
| 796 | spin_unlock_irqrestore(&card->lock, flags); |
| 797 | |
| 798 | fw_node_put(device->node); |
| 799 | kfree(device->config_rom); |
| 800 | kfree(device); |
| 801 | fw_card_put(card); |
| 802 | } |
| 803 | |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 804 | static struct device_type fw_device_type = { |
Stefan Richter | aed8089 | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 805 | .release = fw_device_release, |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 806 | }; |
| 807 | |
Stefan Richter | 099d541 | 2009-06-06 18:37:25 +0200 | [diff] [blame] | 808 | static bool is_fw_device(struct device *dev) |
| 809 | { |
| 810 | return dev->type == &fw_device_type; |
| 811 | } |
| 812 | |
Stefan Richter | aed8089 | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 813 | static int update_unit(struct device *dev, void *data) |
| 814 | { |
| 815 | struct fw_unit *unit = fw_unit(dev); |
| 816 | struct fw_driver *driver = (struct fw_driver *)dev->driver; |
| 817 | |
| 818 | if (is_fw_unit(dev) && driver != NULL && driver->update != NULL) { |
| 819 | down(&dev->sem); |
| 820 | driver->update(unit); |
| 821 | up(&dev->sem); |
| 822 | } |
| 823 | |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | static void fw_device_update(struct work_struct *work) |
| 828 | { |
| 829 | struct fw_device *device = |
| 830 | container_of(work, struct fw_device, work.work); |
| 831 | |
| 832 | fw_device_cdev_update(device); |
| 833 | device_for_each_child(&device->device, NULL, update_unit); |
| 834 | } |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 835 | |
| 836 | /* |
| 837 | * If a device was pending for deletion because its node went away but its |
| 838 | * bus info block and root directory header matches that of a newly discovered |
| 839 | * device, revive the existing fw_device. |
| 840 | * The newly allocated fw_device becomes obsolete instead. |
| 841 | */ |
| 842 | static int lookup_existing_device(struct device *dev, void *data) |
| 843 | { |
| 844 | struct fw_device *old = fw_device(dev); |
| 845 | struct fw_device *new = data; |
| 846 | struct fw_card *card = new->card; |
| 847 | int match = 0; |
| 848 | |
Stefan Richter | 099d541 | 2009-06-06 18:37:25 +0200 | [diff] [blame] | 849 | if (!is_fw_device(dev)) |
| 850 | return 0; |
| 851 | |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 852 | down_read(&fw_device_rwsem); /* serialize config_rom access */ |
| 853 | spin_lock_irq(&card->lock); /* serialize node access */ |
| 854 | |
| 855 | if (memcmp(old->config_rom, new->config_rom, 6 * 4) == 0 && |
| 856 | atomic_cmpxchg(&old->state, |
| 857 | FW_DEVICE_GONE, |
| 858 | FW_DEVICE_RUNNING) == FW_DEVICE_GONE) { |
| 859 | struct fw_node *current_node = new->node; |
| 860 | struct fw_node *obsolete_node = old->node; |
| 861 | |
| 862 | new->node = obsolete_node; |
| 863 | new->node->data = new; |
| 864 | old->node = current_node; |
| 865 | old->node->data = old; |
| 866 | |
| 867 | old->max_speed = new->max_speed; |
| 868 | old->node_id = current_node->node_id; |
| 869 | smp_wmb(); /* update node_id before generation */ |
| 870 | old->generation = card->generation; |
| 871 | old->config_rom_retries = 0; |
| 872 | fw_notify("rediscovered device %s\n", dev_name(dev)); |
| 873 | |
| 874 | PREPARE_DELAYED_WORK(&old->work, fw_device_update); |
| 875 | schedule_delayed_work(&old->work, 0); |
| 876 | |
| 877 | if (current_node == card->root_node) |
| 878 | fw_schedule_bm_work(card, 0); |
| 879 | |
| 880 | match = 1; |
| 881 | } |
| 882 | |
| 883 | spin_unlock_irq(&card->lock); |
| 884 | up_read(&fw_device_rwsem); |
| 885 | |
| 886 | return match; |
| 887 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 888 | |
Stefan Richter | 7889b60 | 2009-03-10 21:09:28 +0100 | [diff] [blame] | 889 | enum { BC_UNKNOWN = 0, BC_UNIMPLEMENTED, BC_IMPLEMENTED, }; |
| 890 | |
Stefan Richter | 099d541 | 2009-06-06 18:37:25 +0200 | [diff] [blame] | 891 | static void set_broadcast_channel(struct fw_device *device, int generation) |
Stefan Richter | 7889b60 | 2009-03-10 21:09:28 +0100 | [diff] [blame] | 892 | { |
| 893 | struct fw_card *card = device->card; |
| 894 | __be32 data; |
| 895 | int rcode; |
| 896 | |
| 897 | if (!card->broadcast_channel_allocated) |
| 898 | return; |
| 899 | |
Stefan Richter | 837ec78 | 2009-06-09 23:56:55 +0200 | [diff] [blame] | 900 | /* |
| 901 | * The Broadcast_Channel Valid bit is required by nodes which want to |
| 902 | * transmit on this channel. Such transmissions are practically |
| 903 | * exclusive to IP over 1394 (RFC 2734). IP capable nodes are required |
| 904 | * to be IRM capable and have a max_rec of 8 or more. We use this fact |
| 905 | * to narrow down to which nodes we send Broadcast_Channel updates. |
| 906 | */ |
| 907 | if (!device->irmc || device->max_rec < 8) |
| 908 | return; |
| 909 | |
| 910 | /* |
| 911 | * Some 1394-1995 nodes crash if this 1394a-2000 register is written. |
| 912 | * Perform a read test first. |
| 913 | */ |
Stefan Richter | 7889b60 | 2009-03-10 21:09:28 +0100 | [diff] [blame] | 914 | if (device->bc_implemented == BC_UNKNOWN) { |
| 915 | rcode = fw_run_transaction(card, TCODE_READ_QUADLET_REQUEST, |
| 916 | device->node_id, generation, device->max_speed, |
| 917 | CSR_REGISTER_BASE + CSR_BROADCAST_CHANNEL, |
| 918 | &data, 4); |
| 919 | switch (rcode) { |
| 920 | case RCODE_COMPLETE: |
| 921 | if (data & cpu_to_be32(1 << 31)) { |
| 922 | device->bc_implemented = BC_IMPLEMENTED; |
| 923 | break; |
| 924 | } |
| 925 | /* else fall through to case address error */ |
| 926 | case RCODE_ADDRESS_ERROR: |
| 927 | device->bc_implemented = BC_UNIMPLEMENTED; |
| 928 | } |
| 929 | } |
| 930 | |
| 931 | if (device->bc_implemented == BC_IMPLEMENTED) { |
| 932 | data = cpu_to_be32(BROADCAST_CHANNEL_INITIAL | |
| 933 | BROADCAST_CHANNEL_VALID); |
| 934 | fw_run_transaction(card, TCODE_WRITE_QUADLET_REQUEST, |
| 935 | device->node_id, generation, device->max_speed, |
| 936 | CSR_REGISTER_BASE + CSR_BROADCAST_CHANNEL, |
| 937 | &data, 4); |
| 938 | } |
| 939 | } |
| 940 | |
Stefan Richter | 099d541 | 2009-06-06 18:37:25 +0200 | [diff] [blame] | 941 | int fw_device_set_broadcast_channel(struct device *dev, void *gen) |
| 942 | { |
| 943 | if (is_fw_device(dev)) |
| 944 | set_broadcast_channel(fw_device(dev), (long)gen); |
| 945 | |
| 946 | return 0; |
| 947 | } |
| 948 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 949 | static void fw_device_init(struct work_struct *work) |
| 950 | { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 951 | struct fw_device *device = |
| 952 | container_of(work, struct fw_device, work.work); |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 953 | struct device *revived_dev; |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 954 | int minor, ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 955 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 956 | /* |
| 957 | * All failure paths here set node->data to NULL, so that we |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 958 | * don't try to do device_for_each_child() on a kfree()'d |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 959 | * device. |
| 960 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 961 | |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 962 | if (read_config_rom(device, device->generation) < 0) { |
Stefan Richter | 855c603 | 2008-02-27 22:14:27 +0100 | [diff] [blame] | 963 | if (device->config_rom_retries < MAX_RETRIES && |
| 964 | atomic_read(&device->state) == FW_DEVICE_INITIALIZING) { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 965 | device->config_rom_retries++; |
| 966 | schedule_delayed_work(&device->work, RETRY_DELAY); |
| 967 | } else { |
Stefan Richter | 907293d | 2007-01-23 21:11:43 +0100 | [diff] [blame] | 968 | fw_notify("giving up on config rom for node id %x\n", |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 969 | device->node_id); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 970 | if (device->node == device->card->root_node) |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 971 | fw_schedule_bm_work(device->card, 0); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 972 | fw_device_release(&device->device); |
| 973 | } |
| 974 | return; |
| 975 | } |
| 976 | |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 977 | revived_dev = device_find_child(device->card->device, |
| 978 | device, lookup_existing_device); |
| 979 | if (revived_dev) { |
| 980 | put_device(revived_dev); |
| 981 | fw_device_release(&device->device); |
| 982 | |
| 983 | return; |
| 984 | } |
| 985 | |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 986 | device_initialize(&device->device); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 987 | |
| 988 | fw_device_get(device); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 989 | down_write(&fw_device_rwsem); |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 990 | ret = idr_pre_get(&fw_device_idr, GFP_KERNEL) ? |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 991 | idr_get_new(&fw_device_idr, device, &minor) : |
| 992 | -ENOMEM; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 993 | up_write(&fw_device_rwsem); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 994 | |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 995 | if (ret < 0) |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 996 | goto error; |
| 997 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 998 | device->device.bus = &fw_bus_type; |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 999 | device->device.type = &fw_device_type; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1000 | device->device.parent = device->card->device; |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 1001 | device->device.devt = MKDEV(fw_cdev_major, minor); |
Kay Sievers | a1f6481 | 2008-10-30 01:41:56 +0100 | [diff] [blame] | 1002 | dev_set_name(&device->device, "fw%d", minor); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1003 | |
Stefan Richter | e5333db | 2009-05-22 23:16:27 +0200 | [diff] [blame] | 1004 | BUILD_BUG_ON(ARRAY_SIZE(device->attribute_group.attrs) < |
| 1005 | ARRAY_SIZE(fw_device_attributes) + |
| 1006 | ARRAY_SIZE(config_rom_attributes)); |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 1007 | init_fw_attribute_group(&device->device, |
| 1008 | fw_device_attributes, |
| 1009 | &device->attribute_group); |
Stefan Richter | e5333db | 2009-05-22 23:16:27 +0200 | [diff] [blame] | 1010 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1011 | if (device_add(&device->device)) { |
| 1012 | fw_error("Failed to add device.\n"); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 1013 | goto error_with_cdev; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1014 | } |
| 1015 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1016 | create_units(device); |
| 1017 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1018 | /* |
| 1019 | * Transition the device to running state. If it got pulled |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1020 | * out from under us while we did the intialization work, we |
| 1021 | * have to shut down the device again here. Normally, though, |
| 1022 | * fw_node_event will be responsible for shutting it down when |
| 1023 | * necessary. We have to use the atomic cmpxchg here to avoid |
| 1024 | * racing with the FW_NODE_DESTROYED case in |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1025 | * fw_node_event(). |
| 1026 | */ |
Stefan Richter | 641f879 | 2007-01-27 10:34:55 +0100 | [diff] [blame] | 1027 | if (atomic_cmpxchg(&device->state, |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 1028 | FW_DEVICE_INITIALIZING, |
| 1029 | FW_DEVICE_RUNNING) == FW_DEVICE_GONE) { |
| 1030 | PREPARE_DELAYED_WORK(&device->work, fw_device_shutdown); |
| 1031 | schedule_delayed_work(&device->work, SHUTDOWN_DELAY); |
Stefan Richter | fa6e697 | 2008-02-03 23:03:00 +0100 | [diff] [blame] | 1032 | } else { |
| 1033 | if (device->config_rom_retries) |
| 1034 | fw_notify("created device %s: GUID %08x%08x, S%d00, " |
| 1035 | "%d config ROM retries\n", |
Kay Sievers | a1f6481 | 2008-10-30 01:41:56 +0100 | [diff] [blame] | 1036 | dev_name(&device->device), |
Stefan Richter | fa6e697 | 2008-02-03 23:03:00 +0100 | [diff] [blame] | 1037 | device->config_rom[3], device->config_rom[4], |
| 1038 | 1 << device->max_speed, |
| 1039 | device->config_rom_retries); |
| 1040 | else |
| 1041 | fw_notify("created device %s: GUID %08x%08x, S%d00\n", |
Kay Sievers | a1f6481 | 2008-10-30 01:41:56 +0100 | [diff] [blame] | 1042 | dev_name(&device->device), |
Stefan Richter | fa6e697 | 2008-02-03 23:03:00 +0100 | [diff] [blame] | 1043 | device->config_rom[3], device->config_rom[4], |
| 1044 | 1 << device->max_speed); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1045 | device->config_rom_retries = 0; |
Stefan Richter | 7889b60 | 2009-03-10 21:09:28 +0100 | [diff] [blame] | 1046 | |
Stefan Richter | 099d541 | 2009-06-06 18:37:25 +0200 | [diff] [blame] | 1047 | set_broadcast_channel(device, device->generation); |
Stefan Richter | fa6e697 | 2008-02-03 23:03:00 +0100 | [diff] [blame] | 1048 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1049 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1050 | /* |
| 1051 | * Reschedule the IRM work if we just finished reading the |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1052 | * root node config rom. If this races with a bus reset we |
| 1053 | * just end up running the IRM work a couple of extra times - |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1054 | * pretty harmless. |
| 1055 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1056 | if (device->node == device->card->root_node) |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 1057 | fw_schedule_bm_work(device->card, 0); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1058 | |
| 1059 | return; |
| 1060 | |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 1061 | error_with_cdev: |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1062 | down_write(&fw_device_rwsem); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 1063 | idr_remove(&fw_device_idr, minor); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1064 | up_write(&fw_device_rwsem); |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 1065 | error: |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 1066 | fw_device_put(device); /* fw_device_idr's reference */ |
| 1067 | |
| 1068 | put_device(&device->device); /* our reference */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1069 | } |
| 1070 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1071 | enum { |
| 1072 | REREAD_BIB_ERROR, |
| 1073 | REREAD_BIB_GONE, |
| 1074 | REREAD_BIB_UNCHANGED, |
| 1075 | REREAD_BIB_CHANGED, |
| 1076 | }; |
| 1077 | |
| 1078 | /* Reread and compare bus info block and header of root directory */ |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 1079 | static int reread_config_rom(struct fw_device *device, int generation) |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1080 | { |
| 1081 | u32 q; |
| 1082 | int i; |
| 1083 | |
| 1084 | for (i = 0; i < 6; i++) { |
| 1085 | if (read_rom(device, generation, i, &q) != RCODE_COMPLETE) |
| 1086 | return REREAD_BIB_ERROR; |
| 1087 | |
| 1088 | if (i == 0 && q == 0) |
| 1089 | return REREAD_BIB_GONE; |
| 1090 | |
Stefan Richter | d01b017 | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 1091 | if (q != device->config_rom[i]) |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1092 | return REREAD_BIB_CHANGED; |
| 1093 | } |
| 1094 | |
| 1095 | return REREAD_BIB_UNCHANGED; |
| 1096 | } |
| 1097 | |
| 1098 | static void fw_device_refresh(struct work_struct *work) |
| 1099 | { |
| 1100 | struct fw_device *device = |
| 1101 | container_of(work, struct fw_device, work.work); |
| 1102 | struct fw_card *card = device->card; |
| 1103 | int node_id = device->node_id; |
| 1104 | |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 1105 | switch (reread_config_rom(device, device->generation)) { |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1106 | case REREAD_BIB_ERROR: |
| 1107 | if (device->config_rom_retries < MAX_RETRIES / 2 && |
| 1108 | atomic_read(&device->state) == FW_DEVICE_INITIALIZING) { |
| 1109 | device->config_rom_retries++; |
| 1110 | schedule_delayed_work(&device->work, RETRY_DELAY / 2); |
| 1111 | |
| 1112 | return; |
| 1113 | } |
| 1114 | goto give_up; |
| 1115 | |
| 1116 | case REREAD_BIB_GONE: |
| 1117 | goto gone; |
| 1118 | |
| 1119 | case REREAD_BIB_UNCHANGED: |
| 1120 | if (atomic_cmpxchg(&device->state, |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 1121 | FW_DEVICE_INITIALIZING, |
| 1122 | FW_DEVICE_RUNNING) == FW_DEVICE_GONE) |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1123 | goto gone; |
| 1124 | |
| 1125 | fw_device_update(work); |
| 1126 | device->config_rom_retries = 0; |
| 1127 | goto out; |
| 1128 | |
| 1129 | case REREAD_BIB_CHANGED: |
| 1130 | break; |
| 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | * Something changed. We keep things simple and don't investigate |
| 1135 | * further. We just destroy all previous units and create new ones. |
| 1136 | */ |
| 1137 | device_for_each_child(&device->device, NULL, shutdown_unit); |
| 1138 | |
Stefan Richter | fd6e0c51 | 2010-02-19 21:00:31 +0100 | [diff] [blame] | 1139 | if (read_config_rom(device, device->generation) < 0) { |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1140 | if (device->config_rom_retries < MAX_RETRIES && |
| 1141 | atomic_read(&device->state) == FW_DEVICE_INITIALIZING) { |
| 1142 | device->config_rom_retries++; |
| 1143 | schedule_delayed_work(&device->work, RETRY_DELAY); |
| 1144 | |
| 1145 | return; |
| 1146 | } |
| 1147 | goto give_up; |
| 1148 | } |
| 1149 | |
| 1150 | create_units(device); |
| 1151 | |
Stefan Richter | 0210b66 | 2009-05-23 00:03:29 +0200 | [diff] [blame] | 1152 | /* Userspace may want to re-read attributes. */ |
| 1153 | kobject_uevent(&device->device.kobj, KOBJ_CHANGE); |
| 1154 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1155 | if (atomic_cmpxchg(&device->state, |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 1156 | FW_DEVICE_INITIALIZING, |
| 1157 | FW_DEVICE_RUNNING) == FW_DEVICE_GONE) |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1158 | goto gone; |
| 1159 | |
Kay Sievers | a1f6481 | 2008-10-30 01:41:56 +0100 | [diff] [blame] | 1160 | fw_notify("refreshed device %s\n", dev_name(&device->device)); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1161 | device->config_rom_retries = 0; |
| 1162 | goto out; |
| 1163 | |
| 1164 | give_up: |
Kay Sievers | a1f6481 | 2008-10-30 01:41:56 +0100 | [diff] [blame] | 1165 | fw_notify("giving up on refresh of device %s\n", dev_name(&device->device)); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1166 | gone: |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 1167 | atomic_set(&device->state, FW_DEVICE_GONE); |
| 1168 | PREPARE_DELAYED_WORK(&device->work, fw_device_shutdown); |
| 1169 | schedule_delayed_work(&device->work, SHUTDOWN_DELAY); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1170 | out: |
| 1171 | if (node_id == card->root_node->node_id) |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 1172 | fw_schedule_bm_work(card, 0); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1173 | } |
| 1174 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1175 | void fw_node_event(struct fw_card *card, struct fw_node *node, int event) |
| 1176 | { |
| 1177 | struct fw_device *device; |
| 1178 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1179 | switch (event) { |
| 1180 | case FW_NODE_CREATED: |
| 1181 | case FW_NODE_LINK_ON: |
| 1182 | if (!node->link_on) |
| 1183 | break; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1184 | create: |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1185 | device = kzalloc(sizeof(*device), GFP_ATOMIC); |
| 1186 | if (device == NULL) |
| 1187 | break; |
| 1188 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1189 | /* |
| 1190 | * Do minimal intialization of the device here, the |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 1191 | * rest will happen in fw_device_init(). |
| 1192 | * |
| 1193 | * Attention: A lot of things, even fw_device_get(), |
| 1194 | * cannot be done before fw_device_init() finished! |
| 1195 | * You can basically just check device->state and |
| 1196 | * schedule work until then, but only while holding |
| 1197 | * card->lock. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1198 | */ |
Stefan Richter | 641f879 | 2007-01-27 10:34:55 +0100 | [diff] [blame] | 1199 | atomic_set(&device->state, FW_DEVICE_INITIALIZING); |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 1200 | device->card = fw_card_get(card); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1201 | device->node = fw_node_get(node); |
| 1202 | device->node_id = node->node_id; |
| 1203 | device->generation = card->generation; |
Stefan Richter | 9236889 | 2009-05-13 21:42:14 +0200 | [diff] [blame] | 1204 | device->is_local = node == card->local_node; |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 1205 | mutex_init(&device->client_list_mutex); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 1206 | INIT_LIST_HEAD(&device->client_list); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1207 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1208 | /* |
| 1209 | * Set the node data to point back to this device so |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1210 | * FW_NODE_UPDATED callbacks can update the node_id |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1211 | * and generation for the device. |
| 1212 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1213 | node->data = device; |
| 1214 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1215 | /* |
| 1216 | * Many devices are slow to respond after bus resets, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1217 | * especially if they are bus powered and go through |
| 1218 | * power-up after getting plugged in. We schedule the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1219 | * first config rom scan half a second after bus reset. |
| 1220 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1221 | INIT_DELAYED_WORK(&device->work, fw_device_init); |
| 1222 | schedule_delayed_work(&device->work, INITIAL_DELAY); |
| 1223 | break; |
| 1224 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1225 | case FW_NODE_INITIATED_RESET: |
| 1226 | device = node->data; |
| 1227 | if (device == NULL) |
| 1228 | goto create; |
| 1229 | |
| 1230 | device->node_id = node->node_id; |
| 1231 | smp_wmb(); /* update node_id before generation */ |
| 1232 | device->generation = card->generation; |
| 1233 | if (atomic_cmpxchg(&device->state, |
| 1234 | FW_DEVICE_RUNNING, |
| 1235 | FW_DEVICE_INITIALIZING) == FW_DEVICE_RUNNING) { |
| 1236 | PREPARE_DELAYED_WORK(&device->work, fw_device_refresh); |
| 1237 | schedule_delayed_work(&device->work, |
Stefan Richter | 9236889 | 2009-05-13 21:42:14 +0200 | [diff] [blame] | 1238 | device->is_local ? 0 : INITIAL_DELAY); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 1239 | } |
| 1240 | break; |
| 1241 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1242 | case FW_NODE_UPDATED: |
| 1243 | if (!node->link_on || node->data == NULL) |
| 1244 | break; |
| 1245 | |
| 1246 | device = node->data; |
| 1247 | device->node_id = node->node_id; |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 1248 | smp_wmb(); /* update node_id before generation */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1249 | device->generation = card->generation; |
Kristian Høgsberg | 5f48047 | 2007-03-07 12:12:39 -0500 | [diff] [blame] | 1250 | if (atomic_read(&device->state) == FW_DEVICE_RUNNING) { |
| 1251 | PREPARE_DELAYED_WORK(&device->work, fw_device_update); |
| 1252 | schedule_delayed_work(&device->work, 0); |
| 1253 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1254 | break; |
| 1255 | |
| 1256 | case FW_NODE_DESTROYED: |
| 1257 | case FW_NODE_LINK_OFF: |
| 1258 | if (!node->data) |
| 1259 | break; |
| 1260 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1261 | /* |
| 1262 | * Destroy the device associated with the node. There |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1263 | * are two cases here: either the device is fully |
| 1264 | * initialized (FW_DEVICE_RUNNING) or we're in the |
| 1265 | * process of reading its config rom |
| 1266 | * (FW_DEVICE_INITIALIZING). If it is fully |
| 1267 | * initialized we can reuse device->work to schedule a |
| 1268 | * full fw_device_shutdown(). If not, there's work |
| 1269 | * scheduled to read it's config rom, and we just put |
| 1270 | * the device in shutdown state to have that code fail |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1271 | * to create the device. |
| 1272 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1273 | device = node->data; |
Stefan Richter | 641f879 | 2007-01-27 10:34:55 +0100 | [diff] [blame] | 1274 | if (atomic_xchg(&device->state, |
Stefan Richter | 3d36a0d | 2009-01-17 22:45:54 +0100 | [diff] [blame] | 1275 | FW_DEVICE_GONE) == FW_DEVICE_RUNNING) { |
Kristian Høgsberg | 5f48047 | 2007-03-07 12:12:39 -0500 | [diff] [blame] | 1276 | PREPARE_DELAYED_WORK(&device->work, fw_device_shutdown); |
Stefan Richter | e747a5c | 2009-01-24 20:35:38 +0100 | [diff] [blame] | 1277 | schedule_delayed_work(&device->work, |
| 1278 | list_empty(&card->link) ? 0 : SHUTDOWN_DELAY); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1279 | } |
| 1280 | break; |
| 1281 | } |
| 1282 | } |