Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 1 | /* |
| 2 | * MEN Chameleon Bus. |
| 3 | * |
| 4 | * Copyright (C) 2013 MEN Mikroelektronik GmbH (www.men.de) |
| 5 | * Author: Johannes Thumshirn <johannes.thumshirn@men.de> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the Free |
| 9 | * Software Foundation; version 2 of the License. |
| 10 | */ |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/idr.h> |
| 16 | #include <linux/mcb.h> |
| 17 | |
| 18 | static DEFINE_IDA(mcb_ida); |
| 19 | |
| 20 | static const struct mcb_device_id *mcb_match_id(const struct mcb_device_id *ids, |
| 21 | struct mcb_device *dev) |
| 22 | { |
| 23 | if (ids) { |
| 24 | while (ids->device) { |
| 25 | if (ids->device == dev->id) |
| 26 | return ids; |
| 27 | ids++; |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | return NULL; |
| 32 | } |
| 33 | |
| 34 | static int mcb_match(struct device *dev, struct device_driver *drv) |
| 35 | { |
| 36 | struct mcb_driver *mdrv = to_mcb_driver(drv); |
| 37 | struct mcb_device *mdev = to_mcb_device(dev); |
| 38 | const struct mcb_device_id *found_id; |
| 39 | |
| 40 | found_id = mcb_match_id(mdrv->id_table, mdev); |
| 41 | if (found_id) |
| 42 | return 1; |
| 43 | |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | static int mcb_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 48 | { |
| 49 | struct mcb_device *mdev = to_mcb_device(dev); |
| 50 | int ret; |
| 51 | |
| 52 | ret = add_uevent_var(env, "MODALIAS=mcb:16z%03d", mdev->id); |
| 53 | if (ret) |
| 54 | return -ENOMEM; |
| 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | static int mcb_probe(struct device *dev) |
| 60 | { |
| 61 | struct mcb_driver *mdrv = to_mcb_driver(dev->driver); |
| 62 | struct mcb_device *mdev = to_mcb_device(dev); |
| 63 | const struct mcb_device_id *found_id; |
Johannes Thumshirn | 4d2ec85 | 2016-05-10 12:39:45 +0200 | [diff] [blame] | 64 | struct module *carrier_mod; |
| 65 | int ret; |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 66 | |
| 67 | found_id = mcb_match_id(mdrv->id_table, mdev); |
| 68 | if (!found_id) |
| 69 | return -ENODEV; |
| 70 | |
Johannes Thumshirn | 4d2ec85 | 2016-05-10 12:39:45 +0200 | [diff] [blame] | 71 | carrier_mod = mdev->dev.parent->driver->owner; |
| 72 | if (!try_module_get(carrier_mod)) |
| 73 | return -EINVAL; |
| 74 | |
Johannes Thumshirn | 7bc3640 | 2016-05-10 12:39:44 +0200 | [diff] [blame] | 75 | get_device(dev); |
Johannes Thumshirn | 4d2ec85 | 2016-05-10 12:39:45 +0200 | [diff] [blame] | 76 | ret = mdrv->probe(mdev, found_id); |
| 77 | if (ret) |
| 78 | module_put(carrier_mod); |
| 79 | |
| 80 | return ret; |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | static int mcb_remove(struct device *dev) |
| 84 | { |
| 85 | struct mcb_driver *mdrv = to_mcb_driver(dev->driver); |
| 86 | struct mcb_device *mdev = to_mcb_device(dev); |
Johannes Thumshirn | 4d2ec85 | 2016-05-10 12:39:45 +0200 | [diff] [blame] | 87 | struct module *carrier_mod; |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 88 | |
| 89 | mdrv->remove(mdev); |
| 90 | |
Johannes Thumshirn | 4d2ec85 | 2016-05-10 12:39:45 +0200 | [diff] [blame] | 91 | carrier_mod = mdev->dev.parent->driver->owner; |
| 92 | module_put(carrier_mod); |
| 93 | |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 94 | put_device(&mdev->dev); |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static void mcb_shutdown(struct device *dev) |
| 100 | { |
Johannes Thumshirn | 5d9e2ab | 2016-05-03 12:42:03 +0200 | [diff] [blame] | 101 | struct mcb_driver *mdrv = to_mcb_driver(dev->driver); |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 102 | struct mcb_device *mdev = to_mcb_device(dev); |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 103 | |
| 104 | if (mdrv && mdrv->shutdown) |
| 105 | mdrv->shutdown(mdev); |
| 106 | } |
| 107 | |
Johannes Thumshirn | 803f1ca | 2016-05-03 09:46:23 +0200 | [diff] [blame] | 108 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, |
| 109 | char *buf) |
| 110 | { |
| 111 | struct mcb_bus *bus = to_mcb_bus(dev); |
| 112 | |
| 113 | return scnprintf(buf, PAGE_SIZE, "%d\n", bus->revision); |
| 114 | } |
| 115 | static DEVICE_ATTR_RO(revision); |
| 116 | |
| 117 | static ssize_t model_show(struct device *dev, struct device_attribute *attr, |
| 118 | char *buf) |
| 119 | { |
| 120 | struct mcb_bus *bus = to_mcb_bus(dev); |
| 121 | |
| 122 | return scnprintf(buf, PAGE_SIZE, "%c\n", bus->model); |
| 123 | } |
| 124 | static DEVICE_ATTR_RO(model); |
| 125 | |
| 126 | static ssize_t minor_show(struct device *dev, struct device_attribute *attr, |
| 127 | char *buf) |
| 128 | { |
| 129 | struct mcb_bus *bus = to_mcb_bus(dev); |
| 130 | |
| 131 | return scnprintf(buf, PAGE_SIZE, "%d\n", bus->minor); |
| 132 | } |
| 133 | static DEVICE_ATTR_RO(minor); |
| 134 | |
| 135 | static ssize_t name_show(struct device *dev, struct device_attribute *attr, |
| 136 | char *buf) |
| 137 | { |
| 138 | struct mcb_bus *bus = to_mcb_bus(dev); |
| 139 | |
| 140 | return scnprintf(buf, PAGE_SIZE, "%s\n", bus->name); |
| 141 | } |
| 142 | static DEVICE_ATTR_RO(name); |
| 143 | |
| 144 | static struct attribute *mcb_bus_attrs[] = { |
| 145 | &dev_attr_revision.attr, |
| 146 | &dev_attr_model.attr, |
| 147 | &dev_attr_minor.attr, |
| 148 | &dev_attr_name.attr, |
| 149 | NULL, |
| 150 | }; |
| 151 | |
| 152 | static const struct attribute_group mcb_carrier_group = { |
| 153 | .attrs = mcb_bus_attrs, |
| 154 | }; |
| 155 | |
| 156 | static const struct attribute_group *mcb_carrier_groups[] = { |
| 157 | &mcb_carrier_group, |
| 158 | NULL, |
| 159 | }; |
| 160 | |
| 161 | |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 162 | static struct bus_type mcb_bus_type = { |
| 163 | .name = "mcb", |
| 164 | .match = mcb_match, |
| 165 | .uevent = mcb_uevent, |
| 166 | .probe = mcb_probe, |
| 167 | .remove = mcb_remove, |
| 168 | .shutdown = mcb_shutdown, |
| 169 | }; |
| 170 | |
Johannes Thumshirn | 803f1ca | 2016-05-03 09:46:23 +0200 | [diff] [blame] | 171 | static struct device_type mcb_carrier_device_type = { |
| 172 | .name = "mcb-carrier", |
| 173 | .groups = mcb_carrier_groups, |
| 174 | }; |
| 175 | |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 176 | /** |
| 177 | * __mcb_register_driver() - Register a @mcb_driver at the system |
| 178 | * @drv: The @mcb_driver |
| 179 | * @owner: The @mcb_driver's module |
| 180 | * @mod_name: The name of the @mcb_driver's module |
| 181 | * |
| 182 | * Register a @mcb_driver at the system. Perform some sanity checks, if |
| 183 | * the .probe and .remove methods are provided by the driver. |
| 184 | */ |
| 185 | int __mcb_register_driver(struct mcb_driver *drv, struct module *owner, |
| 186 | const char *mod_name) |
| 187 | { |
| 188 | if (!drv->probe || !drv->remove) |
| 189 | return -EINVAL; |
| 190 | |
| 191 | drv->driver.owner = owner; |
| 192 | drv->driver.bus = &mcb_bus_type; |
| 193 | drv->driver.mod_name = mod_name; |
| 194 | |
| 195 | return driver_register(&drv->driver); |
| 196 | } |
| 197 | EXPORT_SYMBOL_GPL(__mcb_register_driver); |
| 198 | |
| 199 | /** |
| 200 | * mcb_unregister_driver() - Unregister a @mcb_driver from the system |
| 201 | * @drv: The @mcb_driver |
| 202 | * |
| 203 | * Unregister a @mcb_driver from the system. |
| 204 | */ |
| 205 | void mcb_unregister_driver(struct mcb_driver *drv) |
| 206 | { |
| 207 | driver_unregister(&drv->driver); |
| 208 | } |
| 209 | EXPORT_SYMBOL_GPL(mcb_unregister_driver); |
| 210 | |
| 211 | static void mcb_release_dev(struct device *dev) |
| 212 | { |
| 213 | struct mcb_device *mdev = to_mcb_device(dev); |
| 214 | |
| 215 | mcb_bus_put(mdev->bus); |
| 216 | kfree(mdev); |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * mcb_device_register() - Register a mcb_device |
| 221 | * @bus: The @mcb_bus of the device |
| 222 | * @dev: The @mcb_device |
| 223 | * |
| 224 | * Register a specific @mcb_device at a @mcb_bus and the system itself. |
| 225 | */ |
| 226 | int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev) |
| 227 | { |
| 228 | int ret; |
| 229 | int device_id; |
| 230 | |
| 231 | device_initialize(&dev->dev); |
Johannes Thumshirn | 5d9e2ab | 2016-05-03 12:42:03 +0200 | [diff] [blame] | 232 | mcb_bus_get(bus); |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 233 | dev->dev.bus = &mcb_bus_type; |
| 234 | dev->dev.parent = bus->dev.parent; |
| 235 | dev->dev.release = mcb_release_dev; |
Michael Moese | 2d8784d | 2016-09-14 12:05:24 +0200 | [diff] [blame] | 236 | dev->dma_dev = bus->carrier; |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 237 | |
| 238 | device_id = dev->id; |
| 239 | dev_set_name(&dev->dev, "mcb%d-16z%03d-%d:%d:%d", |
| 240 | bus->bus_nr, device_id, dev->inst, dev->group, dev->var); |
| 241 | |
| 242 | ret = device_add(&dev->dev); |
| 243 | if (ret < 0) { |
| 244 | pr_err("Failed registering device 16z%03d on bus mcb%d (%d)\n", |
| 245 | device_id, bus->bus_nr, ret); |
| 246 | goto out; |
| 247 | } |
| 248 | |
| 249 | return 0; |
| 250 | |
| 251 | out: |
| 252 | |
| 253 | return ret; |
| 254 | } |
| 255 | EXPORT_SYMBOL_GPL(mcb_device_register); |
| 256 | |
Johannes Thumshirn | 5d9e2ab | 2016-05-03 12:42:03 +0200 | [diff] [blame] | 257 | static void mcb_free_bus(struct device *dev) |
| 258 | { |
| 259 | struct mcb_bus *bus = to_mcb_bus(dev); |
| 260 | |
| 261 | put_device(bus->carrier); |
| 262 | ida_simple_remove(&mcb_ida, bus->bus_nr); |
| 263 | kfree(bus); |
| 264 | } |
| 265 | |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 266 | /** |
| 267 | * mcb_alloc_bus() - Allocate a new @mcb_bus |
| 268 | * |
| 269 | * Allocate a new @mcb_bus. |
| 270 | */ |
Johannes Thumshirn | 4ec65b7 | 2014-04-24 14:35:25 +0200 | [diff] [blame] | 271 | struct mcb_bus *mcb_alloc_bus(struct device *carrier) |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 272 | { |
| 273 | struct mcb_bus *bus; |
| 274 | int bus_nr; |
Johannes Thumshirn | 18d2881 | 2016-05-03 09:46:22 +0200 | [diff] [blame] | 275 | int rc; |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 276 | |
| 277 | bus = kzalloc(sizeof(struct mcb_bus), GFP_KERNEL); |
| 278 | if (!bus) |
Johannes Thumshirn | 4ec65b7 | 2014-04-24 14:35:25 +0200 | [diff] [blame] | 279 | return ERR_PTR(-ENOMEM); |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 280 | |
| 281 | bus_nr = ida_simple_get(&mcb_ida, 0, 0, GFP_KERNEL); |
| 282 | if (bus_nr < 0) { |
Johannes Thumshirn | 18d2881 | 2016-05-03 09:46:22 +0200 | [diff] [blame] | 283 | rc = bus_nr; |
| 284 | goto err_free; |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 285 | } |
| 286 | |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 287 | bus->bus_nr = bus_nr; |
Johannes Thumshirn | 5d9e2ab | 2016-05-03 12:42:03 +0200 | [diff] [blame] | 288 | bus->carrier = get_device(carrier); |
Johannes Thumshirn | 18d2881 | 2016-05-03 09:46:22 +0200 | [diff] [blame] | 289 | |
| 290 | device_initialize(&bus->dev); |
| 291 | bus->dev.parent = carrier; |
| 292 | bus->dev.bus = &mcb_bus_type; |
Johannes Thumshirn | 803f1ca | 2016-05-03 09:46:23 +0200 | [diff] [blame] | 293 | bus->dev.type = &mcb_carrier_device_type; |
Johannes Thumshirn | 5d9e2ab | 2016-05-03 12:42:03 +0200 | [diff] [blame] | 294 | bus->dev.release = &mcb_free_bus; |
Johannes Thumshirn | 18d2881 | 2016-05-03 09:46:22 +0200 | [diff] [blame] | 295 | |
| 296 | dev_set_name(&bus->dev, "mcb:%d", bus_nr); |
| 297 | rc = device_add(&bus->dev); |
| 298 | if (rc) |
| 299 | goto err_free; |
| 300 | |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 301 | return bus; |
Johannes Thumshirn | 18d2881 | 2016-05-03 09:46:22 +0200 | [diff] [blame] | 302 | err_free: |
Johannes Thumshirn | 5d9e2ab | 2016-05-03 12:42:03 +0200 | [diff] [blame] | 303 | put_device(carrier); |
Johannes Thumshirn | 18d2881 | 2016-05-03 09:46:22 +0200 | [diff] [blame] | 304 | kfree(bus); |
| 305 | return ERR_PTR(rc); |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 306 | } |
| 307 | EXPORT_SYMBOL_GPL(mcb_alloc_bus); |
| 308 | |
| 309 | static int __mcb_devices_unregister(struct device *dev, void *data) |
| 310 | { |
| 311 | device_unregister(dev); |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | static void mcb_devices_unregister(struct mcb_bus *bus) |
| 316 | { |
| 317 | bus_for_each_dev(&mcb_bus_type, NULL, NULL, __mcb_devices_unregister); |
| 318 | } |
| 319 | /** |
| 320 | * mcb_release_bus() - Free a @mcb_bus |
| 321 | * @bus: The @mcb_bus to release |
| 322 | * |
| 323 | * Release an allocated @mcb_bus from the system. |
| 324 | */ |
| 325 | void mcb_release_bus(struct mcb_bus *bus) |
| 326 | { |
| 327 | mcb_devices_unregister(bus); |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 328 | } |
| 329 | EXPORT_SYMBOL_GPL(mcb_release_bus); |
| 330 | |
| 331 | /** |
| 332 | * mcb_bus_put() - Increment refcnt |
| 333 | * @bus: The @mcb_bus |
| 334 | * |
| 335 | * Get a @mcb_bus' ref |
| 336 | */ |
| 337 | struct mcb_bus *mcb_bus_get(struct mcb_bus *bus) |
| 338 | { |
| 339 | if (bus) |
| 340 | get_device(&bus->dev); |
| 341 | |
| 342 | return bus; |
| 343 | } |
| 344 | EXPORT_SYMBOL_GPL(mcb_bus_get); |
| 345 | |
| 346 | /** |
| 347 | * mcb_bus_put() - Decrement refcnt |
| 348 | * @bus: The @mcb_bus |
| 349 | * |
| 350 | * Release a @mcb_bus' ref |
| 351 | */ |
| 352 | void mcb_bus_put(struct mcb_bus *bus) |
| 353 | { |
| 354 | if (bus) |
| 355 | put_device(&bus->dev); |
| 356 | } |
| 357 | EXPORT_SYMBOL_GPL(mcb_bus_put); |
| 358 | |
| 359 | /** |
| 360 | * mcb_alloc_dev() - Allocate a device |
| 361 | * @bus: The @mcb_bus the device is part of |
| 362 | * |
| 363 | * Allocate a @mcb_device and add bus. |
| 364 | */ |
| 365 | struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus) |
| 366 | { |
| 367 | struct mcb_device *dev; |
| 368 | |
| 369 | dev = kzalloc(sizeof(struct mcb_device), GFP_KERNEL); |
| 370 | if (!dev) |
| 371 | return NULL; |
| 372 | |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 373 | dev->bus = bus; |
| 374 | |
| 375 | return dev; |
| 376 | } |
| 377 | EXPORT_SYMBOL_GPL(mcb_alloc_dev); |
| 378 | |
| 379 | /** |
| 380 | * mcb_free_dev() - Free @mcb_device |
| 381 | * @dev: The device to free |
| 382 | * |
| 383 | * Free a @mcb_device |
| 384 | */ |
| 385 | void mcb_free_dev(struct mcb_device *dev) |
| 386 | { |
| 387 | kfree(dev); |
| 388 | } |
| 389 | EXPORT_SYMBOL_GPL(mcb_free_dev); |
| 390 | |
| 391 | static int __mcb_bus_add_devices(struct device *dev, void *data) |
| 392 | { |
| 393 | struct mcb_device *mdev = to_mcb_device(dev); |
| 394 | int retval; |
| 395 | |
| 396 | if (mdev->is_added) |
| 397 | return 0; |
| 398 | |
| 399 | retval = device_attach(dev); |
| 400 | if (retval < 0) |
| 401 | dev_err(dev, "Error adding device (%d)\n", retval); |
| 402 | |
| 403 | mdev->is_added = true; |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 408 | /** |
| 409 | * mcb_bus_add_devices() - Add devices in the bus' internal device list |
| 410 | * @bus: The @mcb_bus we add the devices |
| 411 | * |
| 412 | * Add devices in the bus' internal device list to the system. |
| 413 | */ |
| 414 | void mcb_bus_add_devices(const struct mcb_bus *bus) |
| 415 | { |
| 416 | bus_for_each_dev(&mcb_bus_type, NULL, NULL, __mcb_bus_add_devices); |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 417 | } |
| 418 | EXPORT_SYMBOL_GPL(mcb_bus_add_devices); |
| 419 | |
| 420 | /** |
Johannes Thumshirn | 2ce8008 | 2017-08-02 09:58:52 +0200 | [diff] [blame] | 421 | * mcb_get_resource() - get a resource for a mcb device |
| 422 | * @dev: the mcb device |
| 423 | * @type: the type of resource |
| 424 | */ |
| 425 | struct resource *mcb_get_resource(struct mcb_device *dev, unsigned int type) |
| 426 | { |
| 427 | if (type == IORESOURCE_MEM) |
| 428 | return &dev->mem; |
| 429 | else if (type == IORESOURCE_IRQ) |
| 430 | return &dev->irq; |
| 431 | else |
| 432 | return NULL; |
| 433 | } |
| 434 | EXPORT_SYMBOL_GPL(mcb_get_resource); |
| 435 | |
| 436 | /** |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 437 | * mcb_request_mem() - Request memory |
| 438 | * @dev: The @mcb_device the memory is for |
| 439 | * @name: The name for the memory reference. |
| 440 | * |
| 441 | * Request memory for a @mcb_device. If @name is NULL the driver name will |
| 442 | * be used. |
| 443 | */ |
| 444 | struct resource *mcb_request_mem(struct mcb_device *dev, const char *name) |
| 445 | { |
| 446 | struct resource *mem; |
| 447 | u32 size; |
| 448 | |
| 449 | if (!name) |
| 450 | name = dev->dev.driver->name; |
| 451 | |
| 452 | size = resource_size(&dev->mem); |
| 453 | |
| 454 | mem = request_mem_region(dev->mem.start, size, name); |
| 455 | if (!mem) |
| 456 | return ERR_PTR(-EBUSY); |
| 457 | |
| 458 | return mem; |
| 459 | } |
| 460 | EXPORT_SYMBOL_GPL(mcb_request_mem); |
| 461 | |
| 462 | /** |
| 463 | * mcb_release_mem() - Release memory requested by device |
| 464 | * @dev: The @mcb_device that requested the memory |
| 465 | * |
| 466 | * Release memory that was prior requested via @mcb_request_mem(). |
| 467 | */ |
| 468 | void mcb_release_mem(struct resource *mem) |
| 469 | { |
| 470 | u32 size; |
| 471 | |
| 472 | size = resource_size(mem); |
| 473 | release_mem_region(mem->start, size); |
| 474 | } |
| 475 | EXPORT_SYMBOL_GPL(mcb_release_mem); |
| 476 | |
Johannes Thumshirn | 4ec65b7 | 2014-04-24 14:35:25 +0200 | [diff] [blame] | 477 | static int __mcb_get_irq(struct mcb_device *dev) |
| 478 | { |
Johannes Thumshirn | 2ce8008 | 2017-08-02 09:58:52 +0200 | [diff] [blame] | 479 | struct resource *irq; |
| 480 | |
| 481 | irq = mcb_get_resource(dev, IORESOURCE_IRQ); |
Johannes Thumshirn | 4ec65b7 | 2014-04-24 14:35:25 +0200 | [diff] [blame] | 482 | |
| 483 | return irq->start; |
| 484 | } |
| 485 | |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 486 | /** |
| 487 | * mcb_get_irq() - Get device's IRQ number |
| 488 | * @dev: The @mcb_device the IRQ is for |
| 489 | * |
| 490 | * Get the IRQ number of a given @mcb_device. |
| 491 | */ |
| 492 | int mcb_get_irq(struct mcb_device *dev) |
| 493 | { |
Johannes Thumshirn | 4ec65b7 | 2014-04-24 14:35:25 +0200 | [diff] [blame] | 494 | struct mcb_bus *bus = dev->bus; |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 495 | |
Johannes Thumshirn | 4ec65b7 | 2014-04-24 14:35:25 +0200 | [diff] [blame] | 496 | if (bus->get_irq) |
| 497 | return bus->get_irq(dev); |
| 498 | |
| 499 | return __mcb_get_irq(dev); |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 500 | } |
| 501 | EXPORT_SYMBOL_GPL(mcb_get_irq); |
| 502 | |
| 503 | static int mcb_init(void) |
| 504 | { |
| 505 | return bus_register(&mcb_bus_type); |
| 506 | } |
| 507 | |
| 508 | static void mcb_exit(void) |
| 509 | { |
Johannes Thumshirn | 169883a | 2015-10-28 08:22:16 +0100 | [diff] [blame] | 510 | ida_destroy(&mcb_ida); |
Johannes Thumshirn | 3764e82 | 2014-02-26 17:29:05 +0100 | [diff] [blame] | 511 | bus_unregister(&mcb_bus_type); |
| 512 | } |
| 513 | |
| 514 | /* mcb must be initialized after PCI but before the chameleon drivers. |
| 515 | * That means we must use some initcall between subsys_initcall and |
| 516 | * device_initcall. |
| 517 | */ |
| 518 | fs_initcall(mcb_init); |
| 519 | module_exit(mcb_exit); |
| 520 | |
| 521 | MODULE_DESCRIPTION("MEN Chameleon Bus Driver"); |
| 522 | MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>"); |
| 523 | MODULE_LICENSE("GPL v2"); |