Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * CompactPCI Hot Plug Driver |
| 3 | * |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 4 | * Copyright (C) 2002,2005 SOMA Networks, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) |
| 6 | * Copyright (C) 2001 IBM Corp. |
| 7 | * |
| 8 | * All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or (at |
| 13 | * your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 18 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 19 | * details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 24 | * |
| 25 | * Send feedback to <scottm@somanetworks.com> |
| 26 | */ |
| 27 | |
| 28 | #include <linux/config.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/pci.h> |
| 33 | #include <linux/init.h> |
| 34 | #include <linux/interrupt.h> |
| 35 | #include <linux/smp_lock.h> |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 36 | #include <asm/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/delay.h> |
| 38 | #include "pci_hotplug.h" |
| 39 | #include "cpci_hotplug.h" |
| 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define DRIVER_AUTHOR "Scott Murray <scottm@somanetworks.com>" |
| 42 | #define DRIVER_DESC "CompactPCI Hot Plug Core" |
| 43 | |
| 44 | #define MY_NAME "cpci_hotplug" |
| 45 | |
| 46 | #define dbg(format, arg...) \ |
| 47 | do { \ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 48 | if (cpci_debug) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | printk (KERN_DEBUG "%s: " format "\n", \ |
| 50 | MY_NAME , ## arg); \ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 51 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg) |
| 53 | #define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg) |
| 54 | #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg) |
| 55 | |
| 56 | /* local variables */ |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 57 | static DECLARE_RWSEM(list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | static LIST_HEAD(slot_list); |
| 59 | static int slots; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 60 | static atomic_t extracting; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | int cpci_debug; |
| 62 | static struct cpci_hp_controller *controller; |
| 63 | static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */ |
| 64 | static struct semaphore thread_exit; /* guard ensure thread has exited before calling it quits */ |
| 65 | static int thread_finished = 1; |
| 66 | |
| 67 | static int enable_slot(struct hotplug_slot *slot); |
| 68 | static int disable_slot(struct hotplug_slot *slot); |
| 69 | static int set_attention_status(struct hotplug_slot *slot, u8 value); |
| 70 | static int get_power_status(struct hotplug_slot *slot, u8 * value); |
| 71 | static int get_attention_status(struct hotplug_slot *slot, u8 * value); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 72 | static int get_adapter_status(struct hotplug_slot *slot, u8 * value); |
| 73 | static int get_latch_status(struct hotplug_slot *slot, u8 * value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | static struct hotplug_slot_ops cpci_hotplug_slot_ops = { |
| 76 | .owner = THIS_MODULE, |
| 77 | .enable_slot = enable_slot, |
| 78 | .disable_slot = disable_slot, |
| 79 | .set_attention_status = set_attention_status, |
| 80 | .get_power_status = get_power_status, |
| 81 | .get_attention_status = get_attention_status, |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 82 | .get_adapter_status = get_adapter_status, |
| 83 | .get_latch_status = get_latch_status, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | }; |
| 85 | |
| 86 | static int |
| 87 | update_latch_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 88 | { |
| 89 | struct hotplug_slot_info info; |
| 90 | |
| 91 | memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); |
| 92 | info.latch_status = value; |
| 93 | return pci_hp_change_slot_info(hotplug_slot, &info); |
| 94 | } |
| 95 | |
| 96 | static int |
| 97 | update_adapter_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 98 | { |
| 99 | struct hotplug_slot_info info; |
| 100 | |
| 101 | memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); |
| 102 | info.adapter_status = value; |
| 103 | return pci_hp_change_slot_info(hotplug_slot, &info); |
| 104 | } |
| 105 | |
| 106 | static int |
| 107 | enable_slot(struct hotplug_slot *hotplug_slot) |
| 108 | { |
| 109 | struct slot *slot = hotplug_slot->private; |
| 110 | int retval = 0; |
| 111 | |
| 112 | dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name); |
| 113 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 114 | if (controller->ops->set_power) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | retval = controller->ops->set_power(slot, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | return retval; |
| 117 | } |
| 118 | |
| 119 | static int |
| 120 | disable_slot(struct hotplug_slot *hotplug_slot) |
| 121 | { |
| 122 | struct slot *slot = hotplug_slot->private; |
| 123 | int retval = 0; |
| 124 | |
| 125 | dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name); |
| 126 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 127 | down_write(&list_rwsem); |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | /* Unconfigure device */ |
| 130 | dbg("%s - unconfiguring slot %s", |
| 131 | __FUNCTION__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 132 | if ((retval = cpci_unconfigure_slot(slot))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | err("%s - could not unconfigure slot %s", |
| 134 | __FUNCTION__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 135 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } |
| 137 | dbg("%s - finished unconfiguring slot %s", |
| 138 | __FUNCTION__, slot->hotplug_slot->name); |
| 139 | |
| 140 | /* Clear EXT (by setting it) */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 141 | if (cpci_clear_ext(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | err("%s - could not clear EXT for slot %s", |
| 143 | __FUNCTION__, slot->hotplug_slot->name); |
| 144 | retval = -ENODEV; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 145 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | } |
| 147 | cpci_led_on(slot); |
| 148 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 149 | if (controller->ops->set_power) |
| 150 | if ((retval = controller->ops->set_power(slot, 0))) |
| 151 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 153 | if (update_adapter_status(slot->hotplug_slot, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | warn("failure to update adapter file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 156 | if (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 157 | slot->extracting = 0; |
| 158 | atomic_dec(&extracting); |
| 159 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 160 | disable_error: |
| 161 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | return retval; |
| 163 | } |
| 164 | |
| 165 | static u8 |
| 166 | cpci_get_power_status(struct slot *slot) |
| 167 | { |
| 168 | u8 power = 1; |
| 169 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 170 | if (controller->ops->get_power) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | power = controller->ops->get_power(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | return power; |
| 173 | } |
| 174 | |
| 175 | static int |
| 176 | get_power_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 177 | { |
| 178 | struct slot *slot = hotplug_slot->private; |
| 179 | |
| 180 | *value = cpci_get_power_status(slot); |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | static int |
| 185 | get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 186 | { |
| 187 | struct slot *slot = hotplug_slot->private; |
| 188 | |
| 189 | *value = cpci_get_attention_status(slot); |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static int |
| 194 | set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) |
| 195 | { |
| 196 | return cpci_set_attention_status(hotplug_slot->private, status); |
| 197 | } |
| 198 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 199 | static int |
| 200 | get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 201 | { |
| 202 | *value = hotplug_slot->info->adapter_status; |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static int |
| 207 | get_latch_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 208 | { |
| 209 | *value = hotplug_slot->info->latch_status; |
| 210 | return 0; |
| 211 | } |
| 212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | static void release_slot(struct hotplug_slot *hotplug_slot) |
| 214 | { |
| 215 | struct slot *slot = hotplug_slot->private; |
| 216 | |
| 217 | kfree(slot->hotplug_slot->info); |
| 218 | kfree(slot->hotplug_slot->name); |
| 219 | kfree(slot->hotplug_slot); |
Scott Murray | 03e49d4 | 2005-06-06 15:48:04 -0400 | [diff] [blame] | 220 | if (slot->dev) |
| 221 | pci_dev_put(slot->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | kfree(slot); |
| 223 | } |
| 224 | |
| 225 | #define SLOT_NAME_SIZE 6 |
| 226 | static void |
| 227 | make_slot_name(struct slot *slot) |
| 228 | { |
| 229 | snprintf(slot->hotplug_slot->name, |
| 230 | SLOT_NAME_SIZE, "%02x:%02x", slot->bus->number, slot->number); |
| 231 | } |
| 232 | |
| 233 | int |
| 234 | cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last) |
| 235 | { |
| 236 | struct slot *slot; |
| 237 | struct hotplug_slot *hotplug_slot; |
| 238 | struct hotplug_slot_info *info; |
| 239 | char *name; |
| 240 | int status = -ENOMEM; |
| 241 | int i; |
| 242 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 243 | if (!(controller && bus)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | /* |
| 247 | * Create a structure for each slot, and register that slot |
| 248 | * with the pci_hotplug subsystem. |
| 249 | */ |
| 250 | for (i = first; i <= last; ++i) { |
| 251 | slot = kmalloc(sizeof (struct slot), GFP_KERNEL); |
| 252 | if (!slot) |
| 253 | goto error; |
| 254 | memset(slot, 0, sizeof (struct slot)); |
| 255 | |
| 256 | hotplug_slot = |
| 257 | kmalloc(sizeof (struct hotplug_slot), GFP_KERNEL); |
| 258 | if (!hotplug_slot) |
| 259 | goto error_slot; |
| 260 | memset(hotplug_slot, 0, sizeof (struct hotplug_slot)); |
| 261 | slot->hotplug_slot = hotplug_slot; |
| 262 | |
| 263 | info = kmalloc(sizeof (struct hotplug_slot_info), GFP_KERNEL); |
| 264 | if (!info) |
| 265 | goto error_hpslot; |
| 266 | memset(info, 0, sizeof (struct hotplug_slot_info)); |
| 267 | hotplug_slot->info = info; |
| 268 | |
| 269 | name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL); |
| 270 | if (!name) |
| 271 | goto error_info; |
| 272 | hotplug_slot->name = name; |
| 273 | |
| 274 | slot->bus = bus; |
| 275 | slot->number = i; |
| 276 | slot->devfn = PCI_DEVFN(i, 0); |
| 277 | |
| 278 | hotplug_slot->private = slot; |
| 279 | hotplug_slot->release = &release_slot; |
| 280 | make_slot_name(slot); |
| 281 | hotplug_slot->ops = &cpci_hotplug_slot_ops; |
| 282 | |
| 283 | /* |
| 284 | * Initialize the slot info structure with some known |
| 285 | * good values. |
| 286 | */ |
| 287 | dbg("initializing slot %s", slot->hotplug_slot->name); |
| 288 | info->power_status = cpci_get_power_status(slot); |
| 289 | info->attention_status = cpci_get_attention_status(slot); |
| 290 | |
| 291 | dbg("registering slot %s", slot->hotplug_slot->name); |
| 292 | status = pci_hp_register(slot->hotplug_slot); |
| 293 | if (status) { |
| 294 | err("pci_hp_register failed with error %d", status); |
| 295 | goto error_name; |
| 296 | } |
| 297 | |
| 298 | /* Add slot to our internal list */ |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 299 | down_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | list_add(&slot->slot_list, &slot_list); |
| 301 | slots++; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 302 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | } |
| 304 | return 0; |
| 305 | error_name: |
| 306 | kfree(name); |
| 307 | error_info: |
| 308 | kfree(info); |
| 309 | error_hpslot: |
| 310 | kfree(hotplug_slot); |
| 311 | error_slot: |
| 312 | kfree(slot); |
| 313 | error: |
| 314 | return status; |
| 315 | } |
| 316 | |
| 317 | int |
| 318 | cpci_hp_unregister_bus(struct pci_bus *bus) |
| 319 | { |
| 320 | struct slot *slot; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 321 | struct slot *tmp; |
| 322 | int status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 324 | down_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 325 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 326 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | return -1; |
| 328 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 329 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 330 | if (slot->bus == bus) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | list_del(&slot->slot_list); |
| 332 | slots--; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 333 | |
| 334 | dbg("deregistering slot %s", slot->hotplug_slot->name); |
| 335 | status = pci_hp_deregister(slot->hotplug_slot); |
| 336 | if (status) { |
| 337 | err("pci_hp_deregister failed with error %d", |
| 338 | status); |
| 339 | break; |
| 340 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | } |
| 342 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 343 | up_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 344 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | /* This is the interrupt mode interrupt handler */ |
| 348 | static irqreturn_t |
| 349 | cpci_hp_intr(int irq, void *data, struct pt_regs *regs) |
| 350 | { |
| 351 | dbg("entered cpci_hp_intr"); |
| 352 | |
| 353 | /* Check to see if it was our interrupt */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 354 | if ((controller->irq_flags & SA_SHIRQ) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | !controller->ops->check_irq(controller->dev_id)) { |
| 356 | dbg("exited cpci_hp_intr, not our interrupt"); |
| 357 | return IRQ_NONE; |
| 358 | } |
| 359 | |
| 360 | /* Disable ENUM interrupt */ |
| 361 | controller->ops->disable_irq(); |
| 362 | |
| 363 | /* Trigger processing by the event thread */ |
| 364 | dbg("Signal event_semaphore"); |
| 365 | up(&event_semaphore); |
| 366 | dbg("exited cpci_hp_intr"); |
| 367 | return IRQ_HANDLED; |
| 368 | } |
| 369 | |
| 370 | /* |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 371 | * According to PICMG 2.1 R2.0, section 6.3.2, upon |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | * initialization, the system driver shall clear the |
| 373 | * INS bits of the cold-inserted devices. |
| 374 | */ |
| 375 | static int |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 376 | init_slots(int clear_ins) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | { |
| 378 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | struct pci_dev* dev; |
| 380 | |
| 381 | dbg("%s - enter", __FUNCTION__); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 382 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 383 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 384 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | return -1; |
| 386 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 387 | list_for_each_entry(slot, &slot_list, slot_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | dbg("%s - looking at slot %s", |
| 389 | __FUNCTION__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 390 | if (clear_ins && cpci_check_and_clear_ins(slot)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | dbg("%s - cleared INS for slot %s", |
| 392 | __FUNCTION__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 393 | dev = pci_get_slot(slot->bus, PCI_DEVFN(slot->number, 0)); |
| 394 | if (dev) { |
| 395 | if (update_adapter_status(slot->hotplug_slot, 1)) |
| 396 | warn("failure to update adapter file"); |
| 397 | if (update_latch_status(slot->hotplug_slot, 1)) |
| 398 | warn("failure to update latch file"); |
| 399 | slot->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | } |
| 401 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 402 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | dbg("%s - exit", __FUNCTION__); |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | static int |
| 408 | check_slots(void) |
| 409 | { |
| 410 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | int extracted; |
| 412 | int inserted; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 413 | u16 hs_csr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 415 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 416 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 417 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | err("no slots registered, shutting down"); |
| 419 | return -1; |
| 420 | } |
| 421 | extracted = inserted = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 422 | list_for_each_entry(slot, &slot_list, slot_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | dbg("%s - looking at slot %s", |
| 424 | __FUNCTION__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 425 | if (cpci_check_and_clear_ins(slot)) { |
| 426 | /* |
| 427 | * Some broken hardware (e.g. PLX 9054AB) asserts |
| 428 | * ENUM# twice... |
| 429 | */ |
| 430 | if (slot->dev) { |
| 431 | warn("slot %s already inserted", |
| 432 | slot->hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | inserted++; |
| 434 | continue; |
| 435 | } |
| 436 | |
| 437 | /* Process insertion */ |
| 438 | dbg("%s - slot %s inserted", |
| 439 | __FUNCTION__, slot->hotplug_slot->name); |
| 440 | |
| 441 | /* GSM, debug */ |
| 442 | hs_csr = cpci_get_hs_csr(slot); |
| 443 | dbg("%s - slot %s HS_CSR (1) = %04x", |
| 444 | __FUNCTION__, slot->hotplug_slot->name, hs_csr); |
| 445 | |
| 446 | /* Configure device */ |
| 447 | dbg("%s - configuring slot %s", |
| 448 | __FUNCTION__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 449 | if (cpci_configure_slot(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | err("%s - could not configure slot %s", |
| 451 | __FUNCTION__, slot->hotplug_slot->name); |
| 452 | continue; |
| 453 | } |
| 454 | dbg("%s - finished configuring slot %s", |
| 455 | __FUNCTION__, slot->hotplug_slot->name); |
| 456 | |
| 457 | /* GSM, debug */ |
| 458 | hs_csr = cpci_get_hs_csr(slot); |
| 459 | dbg("%s - slot %s HS_CSR (2) = %04x", |
| 460 | __FUNCTION__, slot->hotplug_slot->name, hs_csr); |
| 461 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 462 | if (update_latch_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | warn("failure to update latch file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 465 | if (update_adapter_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | warn("failure to update adapter file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
| 468 | cpci_led_off(slot); |
| 469 | |
| 470 | /* GSM, debug */ |
| 471 | hs_csr = cpci_get_hs_csr(slot); |
| 472 | dbg("%s - slot %s HS_CSR (3) = %04x", |
| 473 | __FUNCTION__, slot->hotplug_slot->name, hs_csr); |
| 474 | |
| 475 | inserted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 476 | } else if (cpci_check_ext(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | /* Process extraction request */ |
| 478 | dbg("%s - slot %s extracted", |
| 479 | __FUNCTION__, slot->hotplug_slot->name); |
| 480 | |
| 481 | /* GSM, debug */ |
| 482 | hs_csr = cpci_get_hs_csr(slot); |
| 483 | dbg("%s - slot %s HS_CSR = %04x", |
| 484 | __FUNCTION__, slot->hotplug_slot->name, hs_csr); |
| 485 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 486 | if (!slot->extracting) { |
| 487 | if (update_latch_status(slot->hotplug_slot, 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | warn("failure to update latch file"); |
| 489 | } |
| 490 | slot->extracting = 1; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 491 | atomic_inc(&extracting); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | } |
| 493 | extracted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 494 | } else if (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 495 | hs_csr = cpci_get_hs_csr(slot); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 496 | if (hs_csr == 0xffff) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 497 | /* |
| 498 | * Hmmm, we're likely hosed at this point, should we |
| 499 | * bother trying to tell the driver or not? |
| 500 | */ |
| 501 | err("card in slot %s was improperly removed", |
| 502 | slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 503 | if (update_adapter_status(slot->hotplug_slot, 0)) |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 504 | warn("failure to update adapter file"); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 505 | slot->extracting = 0; |
| 506 | atomic_dec(&extracting); |
| 507 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | } |
| 509 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 510 | up_read(&list_rwsem); |
| 511 | dbg("inserted=%d, extracted=%d, extracting=%d", |
| 512 | inserted, extracted, atomic_read(&extracting)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 513 | if (inserted || extracted) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | return extracted; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 515 | else if (!atomic_read(&extracting)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | err("cannot find ENUM# source, shutting down"); |
| 517 | return -1; |
| 518 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 519 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | } |
| 521 | |
| 522 | /* This is the interrupt mode worker thread body */ |
| 523 | static int |
| 524 | event_thread(void *data) |
| 525 | { |
| 526 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
| 528 | lock_kernel(); |
| 529 | daemonize("cpci_hp_eventd"); |
| 530 | unlock_kernel(); |
| 531 | |
| 532 | dbg("%s - event thread started", __FUNCTION__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 533 | while (1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | dbg("event thread sleeping"); |
| 535 | down_interruptible(&event_semaphore); |
| 536 | dbg("event thread woken, thread_finished = %d", |
| 537 | thread_finished); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 538 | if (thread_finished || signal_pending(current)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | break; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 540 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | rc = check_slots(); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 542 | if (rc > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | /* Give userspace a chance to handle extraction */ |
| 544 | msleep(500); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 545 | } else if (rc < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | dbg("%s - error checking slots", __FUNCTION__); |
| 547 | thread_finished = 1; |
| 548 | break; |
| 549 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 550 | } while (atomic_read(&extracting) && !thread_finished); |
| 551 | if (thread_finished) |
| 552 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | |
| 554 | /* Re-enable ENUM# interrupt */ |
| 555 | dbg("%s - re-enabling irq", __FUNCTION__); |
| 556 | controller->ops->enable_irq(); |
| 557 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | dbg("%s - event thread signals exit", __FUNCTION__); |
| 559 | up(&thread_exit); |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | /* This is the polling mode worker thread body */ |
| 564 | static int |
| 565 | poll_thread(void *data) |
| 566 | { |
| 567 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | lock_kernel(); |
| 570 | daemonize("cpci_hp_polld"); |
| 571 | unlock_kernel(); |
| 572 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 573 | while (1) { |
| 574 | if (thread_finished || signal_pending(current)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | break; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 576 | if (controller->ops->query_enum()) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 577 | do { |
| 578 | rc = check_slots(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 579 | if (rc > 0) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 580 | /* Give userspace a chance to handle extraction */ |
| 581 | msleep(500); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 582 | } else if (rc < 0) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 583 | dbg("%s - error checking slots", __FUNCTION__); |
| 584 | thread_finished = 1; |
| 585 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 587 | } while (atomic_read(&extracting) && !thread_finished); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | msleep(100); |
| 590 | } |
| 591 | dbg("poll thread signals exit"); |
| 592 | up(&thread_exit); |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | static int |
| 597 | cpci_start_thread(void) |
| 598 | { |
| 599 | int pid; |
| 600 | |
| 601 | /* initialize our semaphores */ |
| 602 | init_MUTEX_LOCKED(&event_semaphore); |
| 603 | init_MUTEX_LOCKED(&thread_exit); |
| 604 | thread_finished = 0; |
| 605 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 606 | if (controller->irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | pid = kernel_thread(event_thread, NULL, 0); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 608 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | pid = kernel_thread(poll_thread, NULL, 0); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 610 | if (pid < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | err("Can't start up our thread"); |
| 612 | return -1; |
| 613 | } |
| 614 | dbg("Our thread pid = %d", pid); |
| 615 | return 0; |
| 616 | } |
| 617 | |
| 618 | static void |
| 619 | cpci_stop_thread(void) |
| 620 | { |
| 621 | thread_finished = 1; |
| 622 | dbg("thread finish command given"); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 623 | if (controller->irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | up(&event_semaphore); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | dbg("wait for thread to exit"); |
| 626 | down(&thread_exit); |
| 627 | } |
| 628 | |
| 629 | int |
| 630 | cpci_hp_register_controller(struct cpci_hp_controller *new_controller) |
| 631 | { |
| 632 | int status = 0; |
| 633 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 634 | if (controller) |
| 635 | return -1; |
| 636 | if (!(new_controller && new_controller->ops)) |
| 637 | return -EINVAL; |
| 638 | if (new_controller->irq) { |
| 639 | if (!(new_controller->ops->enable_irq && |
| 640 | new_controller->ops->disable_irq)) |
| 641 | status = -EINVAL; |
| 642 | if (request_irq(new_controller->irq, |
| 643 | cpci_hp_intr, |
| 644 | new_controller->irq_flags, |
| 645 | MY_NAME, |
| 646 | new_controller->dev_id)) { |
| 647 | err("Can't get irq %d for the hotplug cPCI controller", |
| 648 | new_controller->irq); |
| 649 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 651 | dbg("%s - acquired controller irq %d", |
| 652 | __FUNCTION__, new_controller->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 654 | if (!status) |
| 655 | controller = new_controller; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | return status; |
| 657 | } |
| 658 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 659 | static void |
| 660 | cleanup_slots(void) |
| 661 | { |
| 662 | struct slot *slot; |
| 663 | struct slot *tmp; |
| 664 | |
| 665 | /* |
| 666 | * Unregister all of our slots with the pci_hotplug subsystem, |
| 667 | * and free up all memory that we had allocated. |
| 668 | */ |
| 669 | down_write(&list_rwsem); |
| 670 | if (!slots) |
| 671 | goto cleanup_null; |
| 672 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 673 | list_del(&slot->slot_list); |
| 674 | pci_hp_deregister(slot->hotplug_slot); |
| 675 | } |
| 676 | cleanup_null: |
| 677 | up_write(&list_rwsem); |
| 678 | return; |
| 679 | } |
| 680 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | int |
| 682 | cpci_hp_unregister_controller(struct cpci_hp_controller *old_controller) |
| 683 | { |
| 684 | int status = 0; |
| 685 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 686 | if (controller) { |
| 687 | if (!thread_finished) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | cpci_stop_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 689 | if (controller->irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | free_irq(controller->irq, controller->dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | controller = NULL; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 692 | cleanup_slots(); |
| 693 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | return status; |
| 696 | } |
| 697 | |
| 698 | int |
| 699 | cpci_hp_start(void) |
| 700 | { |
| 701 | static int first = 1; |
| 702 | int status; |
| 703 | |
| 704 | dbg("%s - enter", __FUNCTION__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 705 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 708 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 709 | if (list_empty(&slot_list)) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 710 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | return -ENODEV; |
| 712 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 713 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 715 | status = init_slots(first); |
| 716 | if (first) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | first = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 718 | if (status) |
| 719 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
| 721 | status = cpci_start_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 722 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | dbg("%s - thread started", __FUNCTION__); |
| 725 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 726 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | /* Start enum interrupt processing */ |
| 728 | dbg("%s - enabling irq", __FUNCTION__); |
| 729 | controller->ops->enable_irq(); |
| 730 | } |
| 731 | dbg("%s - exit", __FUNCTION__); |
| 732 | return 0; |
| 733 | } |
| 734 | |
| 735 | int |
| 736 | cpci_hp_stop(void) |
| 737 | { |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 738 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | return -ENODEV; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 740 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | /* Stop enum interrupt processing */ |
| 742 | dbg("%s - disabling irq", __FUNCTION__); |
| 743 | controller->ops->disable_irq(); |
| 744 | } |
| 745 | cpci_stop_thread(); |
| 746 | return 0; |
| 747 | } |
| 748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | int __init |
| 750 | cpci_hotplug_init(int debug) |
| 751 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | cpci_debug = debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | return 0; |
| 754 | } |
| 755 | |
| 756 | void __exit |
| 757 | cpci_hotplug_exit(void) |
| 758 | { |
| 759 | /* |
| 760 | * Clean everything up. |
| 761 | */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 762 | cpci_hp_stop(); |
| 763 | cpci_hp_unregister_controller(controller); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | EXPORT_SYMBOL_GPL(cpci_hp_register_controller); |
| 767 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_controller); |
| 768 | EXPORT_SYMBOL_GPL(cpci_hp_register_bus); |
| 769 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_bus); |
| 770 | EXPORT_SYMBOL_GPL(cpci_hp_start); |
| 771 | EXPORT_SYMBOL_GPL(cpci_hp_stop); |