Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Configurable Composite Gadget |
| 3 | * |
| 4 | * Initially contributed as "Android Composite Gdaget" by: |
| 5 | * |
| 6 | * Copyright (C) 2008 Google, Inc. |
| 7 | * Author: Mike Lockwood <lockwood@android.com> |
| 8 | * Benoit Goby <benoit@android.com> |
| 9 | * |
| 10 | * Tailoring it to become a generic Configurable Composite Gadget is |
| 11 | * |
| 12 | * Copyright (C) 2012 Samsung Electronics |
| 13 | * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com> |
| 14 | * |
| 15 | * This software is licensed under the terms of the GNU General Public |
| 16 | * License version 2, as published by the Free Software Foundation, and |
| 17 | * may be copied, distributed, and modified under those terms. |
| 18 | * |
| 19 | * This program is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/fs.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/utsname.h> |
| 32 | #include <linux/platform_device.h> |
| 33 | |
| 34 | #include <linux/usb/ch9.h> |
Sebastian Andrzej Siewior | e220ff7 | 2012-09-06 20:11:06 +0200 | [diff] [blame] | 35 | #include "composite.h" |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 36 | #include <linux/usb/gadget.h> |
| 37 | |
| 38 | #include "gadget_chips.h" |
| 39 | |
| 40 | /* |
| 41 | * Kbuild is not very cooperative with respect to linking separately |
| 42 | * compiled library objects into one module. So for now we won't use |
| 43 | * separate compilation ... ensuring init/exit sections work to shrink |
| 44 | * the runtime footprint, and giving us at least some parts of what |
| 45 | * a "gcc --combine ... part1.c part2.c part3.c ... " build would. |
| 46 | */ |
Sebastian Andrzej Siewior | e220ff7 | 2012-09-06 20:11:06 +0200 | [diff] [blame] | 47 | #include "usbstring.c" |
| 48 | #include "config.c" |
| 49 | #include "epautoconf.c" |
| 50 | #include "composite.c" |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 51 | |
Sebastian Andrzej Siewior | e220ff7 | 2012-09-06 20:11:06 +0200 | [diff] [blame] | 52 | #include "f_mass_storage.c" |
| 53 | #include "u_serial.c" |
| 54 | #include "f_acm.c" |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 55 | #define USB_ETH_RNDIS y |
Sebastian Andrzej Siewior | e220ff7 | 2012-09-06 20:11:06 +0200 | [diff] [blame] | 56 | #include "f_rndis.c" |
| 57 | #include "rndis.c" |
| 58 | #include "u_ether.c" |
| 59 | #include "f_fs.c" |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 60 | |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 61 | MODULE_AUTHOR("Mike Lockwood, Andrzej Pietrasiewicz"); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 62 | MODULE_DESCRIPTION("Configurable Composite USB Gadget"); |
| 63 | MODULE_LICENSE("GPL"); |
| 64 | MODULE_VERSION("1.0"); |
| 65 | |
| 66 | static const char longname[] = "Configurable Composite Gadget"; |
| 67 | |
| 68 | /* Default vendor and product IDs, overridden by userspace */ |
| 69 | #define VENDOR_ID 0x1d6b /* Linux Foundation */ |
| 70 | #define PRODUCT_ID 0x0107 |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 71 | #define GFS_MAX_DEVS 10 |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 72 | |
| 73 | struct ccg_usb_function { |
| 74 | char *name; |
| 75 | void *config; |
| 76 | |
| 77 | struct device *dev; |
| 78 | char *dev_name; |
| 79 | struct device_attribute **attributes; |
| 80 | |
| 81 | /* for ccg_dev.enabled_functions */ |
| 82 | struct list_head enabled_list; |
| 83 | |
| 84 | /* Optional: initialization during gadget bind */ |
| 85 | int (*init)(struct ccg_usb_function *, struct usb_composite_dev *); |
| 86 | /* Optional: cleanup during gadget unbind */ |
| 87 | void (*cleanup)(struct ccg_usb_function *); |
| 88 | |
| 89 | int (*bind_config)(struct ccg_usb_function *, |
| 90 | struct usb_configuration *); |
| 91 | |
| 92 | /* Optional: called when the configuration is removed */ |
| 93 | void (*unbind_config)(struct ccg_usb_function *, |
| 94 | struct usb_configuration *); |
| 95 | /* Optional: handle ctrl requests before the device is configured */ |
| 96 | int (*ctrlrequest)(struct ccg_usb_function *, |
| 97 | struct usb_composite_dev *, |
| 98 | const struct usb_ctrlrequest *); |
| 99 | }; |
| 100 | |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 101 | struct ffs_obj { |
| 102 | const char *name; |
| 103 | bool mounted; |
| 104 | bool desc_ready; |
| 105 | bool used; |
| 106 | struct ffs_data *ffs_data; |
| 107 | }; |
| 108 | |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 109 | struct ccg_dev { |
| 110 | struct ccg_usb_function **functions; |
| 111 | struct list_head enabled_functions; |
| 112 | struct usb_composite_dev *cdev; |
| 113 | struct device *dev; |
| 114 | |
| 115 | bool enabled; |
| 116 | struct mutex mutex; |
| 117 | bool connected; |
| 118 | bool sw_connected; |
| 119 | struct work_struct work; |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 120 | |
| 121 | unsigned int max_func_num; |
| 122 | unsigned int func_num; |
| 123 | struct ffs_obj ffs_tab[GFS_MAX_DEVS]; |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 124 | }; |
| 125 | |
| 126 | static struct class *ccg_class; |
| 127 | static struct ccg_dev *_ccg_dev; |
| 128 | static int ccg_bind_config(struct usb_configuration *c); |
| 129 | static void ccg_unbind_config(struct usb_configuration *c); |
| 130 | |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 131 | static char func_names_buf[256]; |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 132 | |
| 133 | static struct usb_device_descriptor device_desc = { |
| 134 | .bLength = sizeof(device_desc), |
| 135 | .bDescriptorType = USB_DT_DEVICE, |
| 136 | .bcdUSB = __constant_cpu_to_le16(0x0200), |
| 137 | .bDeviceClass = USB_CLASS_PER_INTERFACE, |
| 138 | .idVendor = __constant_cpu_to_le16(VENDOR_ID), |
| 139 | .idProduct = __constant_cpu_to_le16(PRODUCT_ID), |
| 140 | .bcdDevice = __constant_cpu_to_le16(0xffff), |
| 141 | .bNumConfigurations = 1, |
| 142 | }; |
| 143 | |
| 144 | static struct usb_configuration ccg_config_driver = { |
| 145 | .label = "ccg", |
| 146 | .unbind = ccg_unbind_config, |
| 147 | .bConfigurationValue = 1, |
| 148 | .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, |
| 149 | .bMaxPower = 0xFA, /* 500ma */ |
| 150 | }; |
| 151 | |
| 152 | static void ccg_work(struct work_struct *data) |
| 153 | { |
| 154 | struct ccg_dev *dev = container_of(data, struct ccg_dev, work); |
| 155 | struct usb_composite_dev *cdev = dev->cdev; |
| 156 | static char *disconnected[2] = { "USB_STATE=DISCONNECTED", NULL }; |
| 157 | static char *connected[2] = { "USB_STATE=CONNECTED", NULL }; |
| 158 | static char *configured[2] = { "USB_STATE=CONFIGURED", NULL }; |
| 159 | char **uevent_envp = NULL; |
| 160 | unsigned long flags; |
| 161 | |
| 162 | spin_lock_irqsave(&cdev->lock, flags); |
| 163 | if (cdev->config) |
| 164 | uevent_envp = configured; |
| 165 | else if (dev->connected != dev->sw_connected) |
| 166 | uevent_envp = dev->connected ? connected : disconnected; |
| 167 | dev->sw_connected = dev->connected; |
| 168 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 169 | |
| 170 | if (uevent_envp) { |
| 171 | kobject_uevent_env(&dev->dev->kobj, KOBJ_CHANGE, uevent_envp); |
| 172 | pr_info("%s: sent uevent %s\n", __func__, uevent_envp[0]); |
| 173 | } else { |
| 174 | pr_info("%s: did not send uevent (%d %d %p)\n", __func__, |
| 175 | dev->connected, dev->sw_connected, cdev->config); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | |
| 180 | /*-------------------------------------------------------------------------*/ |
| 181 | /* Supported functions initialization */ |
| 182 | |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 183 | static struct ffs_obj *functionfs_find_dev(struct ccg_dev *dev, |
| 184 | const char *dev_name) |
| 185 | { |
| 186 | int i; |
| 187 | |
| 188 | for (i = 0; i < dev->max_func_num; i++) |
| 189 | if (strcmp(dev->ffs_tab[i].name, dev_name) == 0) |
| 190 | return &dev->ffs_tab[i]; |
| 191 | |
| 192 | return NULL; |
| 193 | } |
| 194 | |
| 195 | static bool functionfs_all_ready(struct ccg_dev *dev) |
| 196 | { |
| 197 | int i; |
| 198 | |
| 199 | for (i = 0; i < dev->max_func_num; i++) |
| 200 | if (dev->ffs_tab[i].used && !dev->ffs_tab[i].desc_ready) |
| 201 | return false; |
| 202 | |
| 203 | return true; |
| 204 | } |
| 205 | |
| 206 | static int functionfs_ready_callback(struct ffs_data *ffs) |
| 207 | { |
| 208 | struct ffs_obj *ffs_obj; |
| 209 | int ret; |
| 210 | |
| 211 | mutex_lock(&_ccg_dev->mutex); |
| 212 | |
| 213 | ffs_obj = ffs->private_data; |
| 214 | if (!ffs_obj) { |
| 215 | ret = -EINVAL; |
| 216 | goto done; |
| 217 | } |
| 218 | if (WARN_ON(ffs_obj->desc_ready)) { |
| 219 | ret = -EBUSY; |
| 220 | goto done; |
| 221 | } |
| 222 | ffs_obj->ffs_data = ffs; |
| 223 | |
| 224 | if (functionfs_all_ready(_ccg_dev)) { |
| 225 | ret = -EBUSY; |
| 226 | goto done; |
| 227 | } |
| 228 | ffs_obj->desc_ready = true; |
| 229 | |
| 230 | done: |
| 231 | mutex_unlock(&_ccg_dev->mutex); |
| 232 | return ret; |
| 233 | } |
| 234 | |
| 235 | static void reset_usb(struct ccg_dev *dev) |
| 236 | { |
| 237 | /* Cancel pending control requests */ |
| 238 | usb_ep_dequeue(dev->cdev->gadget->ep0, dev->cdev->req); |
| 239 | usb_remove_config(dev->cdev, &ccg_config_driver); |
| 240 | dev->enabled = false; |
| 241 | usb_gadget_disconnect(dev->cdev->gadget); |
| 242 | } |
| 243 | |
| 244 | static void functionfs_closed_callback(struct ffs_data *ffs) |
| 245 | { |
| 246 | struct ffs_obj *ffs_obj; |
| 247 | |
| 248 | mutex_lock(&_ccg_dev->mutex); |
| 249 | |
| 250 | ffs_obj = ffs->private_data; |
| 251 | if (!ffs_obj) |
| 252 | goto done; |
| 253 | |
| 254 | ffs_obj->desc_ready = false; |
| 255 | |
| 256 | if (_ccg_dev->enabled) |
| 257 | reset_usb(_ccg_dev); |
| 258 | |
| 259 | done: |
| 260 | mutex_unlock(&_ccg_dev->mutex); |
| 261 | } |
| 262 | |
| 263 | static void *functionfs_acquire_dev_callback(const char *dev_name) |
| 264 | { |
| 265 | struct ffs_obj *ffs_dev; |
| 266 | |
| 267 | mutex_lock(&_ccg_dev->mutex); |
| 268 | |
| 269 | ffs_dev = functionfs_find_dev(_ccg_dev, dev_name); |
| 270 | if (!ffs_dev) { |
| 271 | ffs_dev = ERR_PTR(-ENODEV); |
| 272 | goto done; |
| 273 | } |
| 274 | |
| 275 | if (ffs_dev->mounted) { |
| 276 | ffs_dev = ERR_PTR(-EBUSY); |
| 277 | goto done; |
| 278 | } |
| 279 | ffs_dev->mounted = true; |
| 280 | |
| 281 | done: |
| 282 | mutex_unlock(&_ccg_dev->mutex); |
| 283 | return ffs_dev; |
| 284 | } |
| 285 | |
| 286 | static void functionfs_release_dev_callback(struct ffs_data *ffs_data) |
| 287 | { |
| 288 | struct ffs_obj *ffs_dev; |
| 289 | |
| 290 | mutex_lock(&_ccg_dev->mutex); |
| 291 | |
| 292 | ffs_dev = ffs_data->private_data; |
| 293 | if (ffs_dev) |
| 294 | ffs_dev->mounted = false; |
| 295 | |
| 296 | mutex_unlock(&_ccg_dev->mutex); |
| 297 | } |
| 298 | |
| 299 | static int functionfs_function_init(struct ccg_usb_function *f, |
| 300 | struct usb_composite_dev *cdev) |
| 301 | { |
| 302 | return functionfs_init(); |
| 303 | } |
| 304 | |
| 305 | static void functionfs_function_cleanup(struct ccg_usb_function *f) |
| 306 | { |
| 307 | functionfs_cleanup(); |
| 308 | } |
| 309 | |
| 310 | static int functionfs_function_bind_config(struct ccg_usb_function *f, |
| 311 | struct usb_configuration *c) |
| 312 | { |
| 313 | struct ccg_dev *dev = _ccg_dev; |
| 314 | int i, ret; |
| 315 | |
| 316 | for (i = dev->max_func_num; i--; ) { |
| 317 | if (!dev->ffs_tab[i].used) |
| 318 | continue; |
| 319 | ret = functionfs_bind(dev->ffs_tab[i].ffs_data, c->cdev); |
| 320 | if (unlikely(ret < 0)) { |
| 321 | while (++i < dev->max_func_num) |
| 322 | functionfs_unbind(dev->ffs_tab[i].ffs_data); |
| 323 | return ret; |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | for (i = dev->max_func_num; i--; ) { |
| 328 | if (!dev->ffs_tab[i].used) |
| 329 | continue; |
| 330 | ret = functionfs_bind_config(c->cdev, c, |
| 331 | dev->ffs_tab[i].ffs_data); |
| 332 | if (unlikely(ret < 0)) |
| 333 | return ret; |
| 334 | } |
| 335 | |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | static void functionfs_function_unbind_config(struct ccg_usb_function *f, |
| 340 | struct usb_configuration *c) |
| 341 | { |
| 342 | struct ccg_dev *dev = _ccg_dev; |
| 343 | int i; |
| 344 | |
| 345 | for (i = dev->max_func_num; i--; ) |
| 346 | if (dev->ffs_tab[i].ffs_data) |
| 347 | functionfs_unbind(dev->ffs_tab[i].ffs_data); |
| 348 | } |
| 349 | |
| 350 | static ssize_t functionfs_user_functions_show(struct device *_dev, |
| 351 | struct device_attribute *attr, |
| 352 | char *buf) |
| 353 | { |
| 354 | struct ccg_dev *dev = _ccg_dev; |
| 355 | char *buff = buf; |
| 356 | int i; |
| 357 | |
| 358 | mutex_lock(&dev->mutex); |
| 359 | |
| 360 | for (i = 0; i < dev->max_func_num; i++) |
| 361 | buff += snprintf(buff, PAGE_SIZE + buf - buff, "%s,", |
| 362 | dev->ffs_tab[i].name); |
| 363 | |
| 364 | mutex_unlock(&dev->mutex); |
| 365 | |
| 366 | if (buff != buf) |
| 367 | *(buff - 1) = '\n'; |
| 368 | return buff - buf; |
| 369 | } |
| 370 | |
| 371 | static ssize_t functionfs_user_functions_store(struct device *_dev, |
| 372 | struct device_attribute *attr, |
| 373 | const char *buff, size_t size) |
| 374 | { |
| 375 | struct ccg_dev *dev = _ccg_dev; |
| 376 | char *name, *b; |
| 377 | ssize_t ret = size; |
| 378 | int i; |
| 379 | |
| 380 | buff = skip_spaces(buff); |
| 381 | if (!*buff) |
| 382 | return -EINVAL; |
| 383 | |
| 384 | mutex_lock(&dev->mutex); |
| 385 | |
| 386 | if (dev->enabled) { |
| 387 | ret = -EBUSY; |
| 388 | goto end; |
| 389 | } |
| 390 | |
| 391 | for (i = 0; i < dev->max_func_num; i++) |
| 392 | if (dev->ffs_tab[i].mounted) { |
| 393 | ret = -EBUSY; |
| 394 | goto end; |
| 395 | } |
| 396 | |
| 397 | strlcpy(func_names_buf, buff, sizeof(func_names_buf)); |
| 398 | b = strim(func_names_buf); |
| 399 | |
| 400 | /* replace the list of functions */ |
| 401 | dev->max_func_num = 0; |
| 402 | while (b) { |
| 403 | name = strsep(&b, ","); |
| 404 | if (dev->max_func_num == GFS_MAX_DEVS) { |
| 405 | ret = -ENOSPC; |
| 406 | goto end; |
| 407 | } |
| 408 | if (functionfs_find_dev(dev, name)) { |
| 409 | ret = -EEXIST; |
| 410 | continue; |
| 411 | } |
| 412 | dev->ffs_tab[dev->max_func_num++].name = name; |
| 413 | } |
| 414 | |
| 415 | end: |
| 416 | mutex_unlock(&dev->mutex); |
| 417 | return ret; |
| 418 | } |
| 419 | |
| 420 | static DEVICE_ATTR(user_functions, S_IRUGO | S_IWUSR, |
| 421 | functionfs_user_functions_show, |
| 422 | functionfs_user_functions_store); |
| 423 | |
| 424 | static ssize_t functionfs_max_user_functions_show(struct device *_dev, |
| 425 | struct device_attribute *attr, |
| 426 | char *buf) |
| 427 | { |
| 428 | return sprintf(buf, "%d", GFS_MAX_DEVS); |
| 429 | } |
| 430 | |
| 431 | static DEVICE_ATTR(max_user_functions, S_IRUGO, |
| 432 | functionfs_max_user_functions_show, NULL); |
| 433 | |
| 434 | static struct device_attribute *functionfs_function_attributes[] = { |
| 435 | &dev_attr_user_functions, |
| 436 | &dev_attr_max_user_functions, |
| 437 | NULL |
| 438 | }; |
| 439 | |
| 440 | static struct ccg_usb_function functionfs_function = { |
| 441 | .name = "fs", |
| 442 | .init = functionfs_function_init, |
| 443 | .cleanup = functionfs_function_cleanup, |
| 444 | .bind_config = functionfs_function_bind_config, |
| 445 | .unbind_config = functionfs_function_unbind_config, |
| 446 | .attributes = functionfs_function_attributes, |
| 447 | }; |
| 448 | |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 449 | #define MAX_ACM_INSTANCES 4 |
| 450 | struct acm_function_config { |
| 451 | int instances; |
| 452 | }; |
| 453 | |
| 454 | static int |
| 455 | acm_function_init(struct ccg_usb_function *f, struct usb_composite_dev *cdev) |
| 456 | { |
| 457 | f->config = kzalloc(sizeof(struct acm_function_config), GFP_KERNEL); |
| 458 | if (!f->config) |
| 459 | return -ENOMEM; |
| 460 | |
| 461 | return gserial_setup(cdev->gadget, MAX_ACM_INSTANCES); |
| 462 | } |
| 463 | |
| 464 | static void acm_function_cleanup(struct ccg_usb_function *f) |
| 465 | { |
| 466 | gserial_cleanup(); |
| 467 | kfree(f->config); |
| 468 | f->config = NULL; |
| 469 | } |
| 470 | |
| 471 | static int |
| 472 | acm_function_bind_config(struct ccg_usb_function *f, |
| 473 | struct usb_configuration *c) |
| 474 | { |
| 475 | int i; |
| 476 | int ret = 0; |
| 477 | struct acm_function_config *config = f->config; |
| 478 | |
| 479 | for (i = 0; i < config->instances; i++) { |
| 480 | ret = acm_bind_config(c, i); |
| 481 | if (ret) { |
| 482 | pr_err("Could not bind acm%u config\n", i); |
| 483 | break; |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | return ret; |
| 488 | } |
| 489 | |
| 490 | static ssize_t acm_instances_show(struct device *dev, |
| 491 | struct device_attribute *attr, char *buf) |
| 492 | { |
| 493 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 494 | struct acm_function_config *config = f->config; |
| 495 | return sprintf(buf, "%d\n", config->instances); |
| 496 | } |
| 497 | |
| 498 | static ssize_t acm_instances_store(struct device *dev, |
| 499 | struct device_attribute *attr, const char *buf, size_t size) |
| 500 | { |
| 501 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 502 | struct acm_function_config *config = f->config; |
| 503 | int value; |
| 504 | int ret = 0; |
| 505 | |
| 506 | ret = kstrtoint(buf, 10, &value); |
| 507 | if (ret) |
| 508 | return ret; |
| 509 | |
| 510 | if (value > MAX_ACM_INSTANCES) |
| 511 | return -EINVAL; |
| 512 | |
| 513 | config->instances = value; |
| 514 | |
| 515 | return size; |
| 516 | } |
| 517 | |
| 518 | static DEVICE_ATTR(instances, S_IRUGO | S_IWUSR, acm_instances_show, |
| 519 | acm_instances_store); |
| 520 | static struct device_attribute *acm_function_attributes[] = { |
| 521 | &dev_attr_instances, |
| 522 | NULL |
| 523 | }; |
| 524 | |
| 525 | static struct ccg_usb_function acm_function = { |
| 526 | .name = "acm", |
| 527 | .init = acm_function_init, |
| 528 | .cleanup = acm_function_cleanup, |
| 529 | .bind_config = acm_function_bind_config, |
| 530 | .attributes = acm_function_attributes, |
| 531 | }; |
| 532 | |
| 533 | struct rndis_function_config { |
| 534 | u8 ethaddr[ETH_ALEN]; |
| 535 | u32 vendorID; |
| 536 | char manufacturer[256]; |
| 537 | /* "Wireless" RNDIS; auto-detected by Windows */ |
| 538 | bool wceis; |
| 539 | }; |
| 540 | |
| 541 | static int rndis_function_init(struct ccg_usb_function *f, |
| 542 | struct usb_composite_dev *cdev) |
| 543 | { |
| 544 | f->config = kzalloc(sizeof(struct rndis_function_config), GFP_KERNEL); |
| 545 | if (!f->config) |
| 546 | return -ENOMEM; |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | static void rndis_function_cleanup(struct ccg_usb_function *f) |
| 551 | { |
| 552 | kfree(f->config); |
| 553 | f->config = NULL; |
| 554 | } |
| 555 | |
| 556 | static int rndis_function_bind_config(struct ccg_usb_function *f, |
| 557 | struct usb_configuration *c) |
| 558 | { |
| 559 | int ret; |
| 560 | struct rndis_function_config *rndis = f->config; |
| 561 | |
| 562 | if (!rndis) { |
| 563 | pr_err("%s: rndis_pdata\n", __func__); |
| 564 | return -1; |
| 565 | } |
| 566 | |
Andy Shevchenko | 0932966 | 2012-07-06 18:39:47 +0300 | [diff] [blame] | 567 | pr_info("%s MAC: %pM\n", __func__, rndis->ethaddr); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 568 | |
| 569 | ret = gether_setup_name(c->cdev->gadget, rndis->ethaddr, "rndis"); |
| 570 | if (ret) { |
| 571 | pr_err("%s: gether_setup failed\n", __func__); |
| 572 | return ret; |
| 573 | } |
| 574 | |
| 575 | if (rndis->wceis) { |
| 576 | /* "Wireless" RNDIS; auto-detected by Windows */ |
| 577 | rndis_iad_descriptor.bFunctionClass = |
| 578 | USB_CLASS_WIRELESS_CONTROLLER; |
| 579 | rndis_iad_descriptor.bFunctionSubClass = 0x01; |
| 580 | rndis_iad_descriptor.bFunctionProtocol = 0x03; |
| 581 | rndis_control_intf.bInterfaceClass = |
| 582 | USB_CLASS_WIRELESS_CONTROLLER; |
| 583 | rndis_control_intf.bInterfaceSubClass = 0x01; |
| 584 | rndis_control_intf.bInterfaceProtocol = 0x03; |
| 585 | } |
| 586 | |
| 587 | return rndis_bind_config_vendor(c, rndis->ethaddr, rndis->vendorID, |
| 588 | rndis->manufacturer); |
| 589 | } |
| 590 | |
| 591 | static void rndis_function_unbind_config(struct ccg_usb_function *f, |
| 592 | struct usb_configuration *c) |
| 593 | { |
| 594 | gether_cleanup(); |
| 595 | } |
| 596 | |
| 597 | static ssize_t rndis_manufacturer_show(struct device *dev, |
| 598 | struct device_attribute *attr, char *buf) |
| 599 | { |
| 600 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 601 | struct rndis_function_config *config = f->config; |
| 602 | return sprintf(buf, "%s\n", config->manufacturer); |
| 603 | } |
| 604 | |
| 605 | static ssize_t rndis_manufacturer_store(struct device *dev, |
| 606 | struct device_attribute *attr, const char *buf, size_t size) |
| 607 | { |
| 608 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 609 | struct rndis_function_config *config = f->config; |
| 610 | |
| 611 | if (size >= sizeof(config->manufacturer)) |
| 612 | return -EINVAL; |
| 613 | memcpy(config->manufacturer, buf, size); |
| 614 | config->manufacturer[size] = 0; |
| 615 | |
| 616 | return size; |
| 617 | } |
| 618 | |
| 619 | static DEVICE_ATTR(manufacturer, S_IRUGO | S_IWUSR, rndis_manufacturer_show, |
| 620 | rndis_manufacturer_store); |
| 621 | |
| 622 | static ssize_t rndis_wceis_show(struct device *dev, |
| 623 | struct device_attribute *attr, char *buf) |
| 624 | { |
| 625 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 626 | struct rndis_function_config *config = f->config; |
| 627 | return sprintf(buf, "%d\n", config->wceis); |
| 628 | } |
| 629 | |
| 630 | static ssize_t rndis_wceis_store(struct device *dev, |
| 631 | struct device_attribute *attr, const char *buf, size_t size) |
| 632 | { |
| 633 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 634 | struct rndis_function_config *config = f->config; |
| 635 | int value; |
| 636 | int ret; |
| 637 | |
| 638 | ret = kstrtoint(buf, 10, &value); |
| 639 | if (ret) |
| 640 | return ret; |
| 641 | |
| 642 | config->wceis = value; |
| 643 | |
| 644 | return size; |
| 645 | } |
| 646 | |
| 647 | static DEVICE_ATTR(wceis, S_IRUGO | S_IWUSR, rndis_wceis_show, |
| 648 | rndis_wceis_store); |
| 649 | |
| 650 | static ssize_t rndis_ethaddr_show(struct device *dev, |
| 651 | struct device_attribute *attr, char *buf) |
| 652 | { |
| 653 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 654 | struct rndis_function_config *rndis = f->config; |
Andy Shevchenko | 0932966 | 2012-07-06 18:39:47 +0300 | [diff] [blame] | 655 | return sprintf(buf, "%pM\n", rndis->ethaddr); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | static ssize_t rndis_ethaddr_store(struct device *dev, |
| 659 | struct device_attribute *attr, const char *buf, size_t size) |
| 660 | { |
| 661 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 662 | struct rndis_function_config *rndis = f->config; |
| 663 | unsigned char tmp[6]; |
| 664 | |
| 665 | if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", |
| 666 | tmp + 0, tmp + 1, tmp + 2, tmp + 3, tmp + 4, tmp + 5) != |
| 667 | ETH_ALEN) |
| 668 | return -EINVAL; |
| 669 | |
| 670 | memcpy(rndis->ethaddr, tmp, ETH_ALEN); |
| 671 | |
| 672 | return ETH_ALEN; |
| 673 | |
| 674 | } |
| 675 | |
| 676 | static DEVICE_ATTR(ethaddr, S_IRUGO | S_IWUSR, rndis_ethaddr_show, |
| 677 | rndis_ethaddr_store); |
| 678 | |
| 679 | static ssize_t rndis_vendorID_show(struct device *dev, |
| 680 | struct device_attribute *attr, char *buf) |
| 681 | { |
| 682 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 683 | struct rndis_function_config *config = f->config; |
| 684 | return sprintf(buf, "%04x\n", config->vendorID); |
| 685 | } |
| 686 | |
| 687 | static ssize_t rndis_vendorID_store(struct device *dev, |
| 688 | struct device_attribute *attr, const char *buf, size_t size) |
| 689 | { |
| 690 | struct ccg_usb_function *f = dev_get_drvdata(dev); |
| 691 | struct rndis_function_config *config = f->config; |
| 692 | int value; |
| 693 | int ret; |
| 694 | |
| 695 | ret = kstrtou32(buf, 16, &value); |
| 696 | if (ret) |
| 697 | return ret; |
| 698 | |
| 699 | config->vendorID = value; |
| 700 | |
| 701 | return size; |
| 702 | } |
| 703 | |
| 704 | static DEVICE_ATTR(vendorID, S_IRUGO | S_IWUSR, rndis_vendorID_show, |
| 705 | rndis_vendorID_store); |
| 706 | |
| 707 | static struct device_attribute *rndis_function_attributes[] = { |
| 708 | &dev_attr_manufacturer, |
| 709 | &dev_attr_wceis, |
| 710 | &dev_attr_ethaddr, |
| 711 | &dev_attr_vendorID, |
| 712 | NULL |
| 713 | }; |
| 714 | |
| 715 | static struct ccg_usb_function rndis_function = { |
| 716 | .name = "rndis", |
| 717 | .init = rndis_function_init, |
| 718 | .cleanup = rndis_function_cleanup, |
| 719 | .bind_config = rndis_function_bind_config, |
| 720 | .unbind_config = rndis_function_unbind_config, |
| 721 | .attributes = rndis_function_attributes, |
| 722 | }; |
| 723 | |
| 724 | static int mass_storage_function_init(struct ccg_usb_function *f, |
| 725 | struct usb_composite_dev *cdev) |
| 726 | { |
| 727 | struct fsg_config fsg; |
| 728 | struct fsg_common *common; |
| 729 | int err; |
| 730 | |
Marek Belisko | e996f9d | 2012-08-08 22:14:38 +0200 | [diff] [blame] | 731 | memset(&fsg, 0, sizeof(fsg)); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 732 | fsg.nluns = 1; |
| 733 | fsg.luns[0].removable = 1; |
| 734 | fsg.vendor_name = iManufacturer; |
| 735 | fsg.product_name = iProduct; |
| 736 | |
| 737 | common = fsg_common_init(NULL, cdev, &fsg); |
| 738 | if (IS_ERR(common)) |
| 739 | return PTR_ERR(common); |
| 740 | |
| 741 | err = sysfs_create_link(&f->dev->kobj, |
| 742 | &common->luns[0].dev.kobj, |
| 743 | "lun"); |
| 744 | if (err) { |
| 745 | fsg_common_put(common); |
| 746 | return err; |
| 747 | } |
| 748 | |
| 749 | f->config = common; |
| 750 | return 0; |
| 751 | } |
| 752 | |
| 753 | static void mass_storage_function_cleanup(struct ccg_usb_function *f) |
| 754 | { |
| 755 | fsg_common_put(f->config); |
| 756 | f->config = NULL; |
| 757 | } |
| 758 | |
| 759 | static int mass_storage_function_bind_config(struct ccg_usb_function *f, |
| 760 | struct usb_configuration *c) |
| 761 | { |
| 762 | struct fsg_common *common = f->config; |
| 763 | return fsg_bind_config(c->cdev, c, common); |
| 764 | } |
| 765 | |
| 766 | static struct ccg_usb_function mass_storage_function = { |
| 767 | .name = "mass_storage", |
| 768 | .init = mass_storage_function_init, |
| 769 | .cleanup = mass_storage_function_cleanup, |
| 770 | .bind_config = mass_storage_function_bind_config, |
| 771 | }; |
| 772 | |
| 773 | static struct ccg_usb_function *supported_functions[] = { |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 774 | &functionfs_function, |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 775 | &acm_function, |
| 776 | &rndis_function, |
| 777 | &mass_storage_function, |
| 778 | NULL |
| 779 | }; |
| 780 | |
| 781 | |
| 782 | static int ccg_init_functions(struct ccg_usb_function **functions, |
| 783 | struct usb_composite_dev *cdev) |
| 784 | { |
| 785 | struct ccg_dev *dev = _ccg_dev; |
| 786 | struct ccg_usb_function *f; |
| 787 | struct device_attribute **attrs; |
| 788 | struct device_attribute *attr; |
| 789 | int err; |
| 790 | int index = 0; |
| 791 | |
| 792 | for (; (f = *functions++); index++) { |
| 793 | f->dev_name = kasprintf(GFP_KERNEL, "f_%s", f->name); |
| 794 | if (!f->dev_name) { |
| 795 | pr_err("%s: Failed to alloc name %s", __func__, |
| 796 | f->name); |
| 797 | err = -ENOMEM; |
| 798 | goto err_alloc; |
| 799 | } |
| 800 | f->dev = device_create(ccg_class, dev->dev, |
| 801 | MKDEV(0, index), f, f->dev_name); |
| 802 | if (IS_ERR(f->dev)) { |
| 803 | pr_err("%s: Failed to create dev %s", __func__, |
| 804 | f->dev_name); |
| 805 | err = PTR_ERR(f->dev); |
| 806 | f->dev = NULL; |
| 807 | goto err_create; |
| 808 | } |
| 809 | |
| 810 | if (f->init) { |
| 811 | err = f->init(f, cdev); |
| 812 | if (err) { |
| 813 | pr_err("%s: Failed to init %s", __func__, |
| 814 | f->name); |
| 815 | goto err_out; |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | attrs = f->attributes; |
| 820 | if (attrs) { |
| 821 | while ((attr = *attrs++) && !err) |
| 822 | err = device_create_file(f->dev, attr); |
| 823 | } |
| 824 | if (err) { |
| 825 | pr_err("%s: Failed to create function %s attributes", |
| 826 | __func__, f->name); |
| 827 | goto err_uninit; |
| 828 | } |
| 829 | } |
| 830 | return 0; |
| 831 | |
| 832 | err_uninit: |
| 833 | if (f->cleanup) |
| 834 | f->cleanup(f); |
| 835 | err_out: |
| 836 | device_destroy(ccg_class, f->dev->devt); |
| 837 | f->dev = NULL; |
| 838 | err_create: |
| 839 | kfree(f->dev_name); |
| 840 | err_alloc: |
| 841 | return err; |
| 842 | } |
| 843 | |
| 844 | static void ccg_cleanup_functions(struct ccg_usb_function **functions) |
| 845 | { |
| 846 | struct ccg_usb_function *f; |
| 847 | |
| 848 | while (*functions) { |
| 849 | f = *functions++; |
| 850 | |
| 851 | if (f->dev) { |
| 852 | if (f->cleanup) |
| 853 | f->cleanup(f); |
| 854 | device_destroy(ccg_class, f->dev->devt); |
| 855 | kfree(f->dev_name); |
| 856 | } |
| 857 | } |
| 858 | } |
| 859 | |
| 860 | static int ccg_bind_enabled_functions(struct ccg_dev *dev, |
| 861 | struct usb_configuration *c) |
| 862 | { |
| 863 | struct ccg_usb_function *f; |
| 864 | int ret; |
| 865 | |
| 866 | list_for_each_entry(f, &dev->enabled_functions, enabled_list) { |
| 867 | ret = f->bind_config(f, c); |
| 868 | if (ret) { |
| 869 | pr_err("%s: %s failed", __func__, f->name); |
| 870 | return ret; |
| 871 | } |
| 872 | } |
| 873 | return 0; |
| 874 | } |
| 875 | |
| 876 | static void ccg_unbind_enabled_functions(struct ccg_dev *dev, |
| 877 | struct usb_configuration *c) |
| 878 | { |
| 879 | struct ccg_usb_function *f; |
| 880 | |
| 881 | list_for_each_entry(f, &dev->enabled_functions, enabled_list) |
| 882 | if (f->unbind_config) |
| 883 | f->unbind_config(f, c); |
| 884 | } |
| 885 | |
| 886 | static int ccg_enable_function(struct ccg_dev *dev, char *name) |
| 887 | { |
| 888 | struct ccg_usb_function **functions = dev->functions; |
| 889 | struct ccg_usb_function *f; |
| 890 | while ((f = *functions++)) { |
| 891 | if (!strcmp(name, f->name)) { |
| 892 | list_add_tail(&f->enabled_list, |
| 893 | &dev->enabled_functions); |
| 894 | return 0; |
| 895 | } |
| 896 | } |
| 897 | return -EINVAL; |
| 898 | } |
| 899 | |
| 900 | /*-------------------------------------------------------------------------*/ |
| 901 | /* /sys/class/ccg_usb/ccg%d/ interface */ |
| 902 | |
| 903 | static ssize_t |
| 904 | functions_show(struct device *pdev, struct device_attribute *attr, char *buf) |
| 905 | { |
| 906 | struct ccg_dev *dev = dev_get_drvdata(pdev); |
| 907 | struct ccg_usb_function *f; |
| 908 | char *buff = buf; |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 909 | int i; |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 910 | |
| 911 | mutex_lock(&dev->mutex); |
| 912 | |
| 913 | list_for_each_entry(f, &dev->enabled_functions, enabled_list) |
| 914 | buff += sprintf(buff, "%s,", f->name); |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 915 | for (i = 0; i < dev->max_func_num; i++) |
| 916 | if (dev->ffs_tab[i].used) |
| 917 | buff += sprintf(buff, "%s", dev->ffs_tab[i].name); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 918 | |
| 919 | mutex_unlock(&dev->mutex); |
| 920 | |
| 921 | if (buff != buf) |
| 922 | *(buff-1) = '\n'; |
| 923 | return buff - buf; |
| 924 | } |
| 925 | |
| 926 | static ssize_t |
| 927 | functions_store(struct device *pdev, struct device_attribute *attr, |
| 928 | const char *buff, size_t size) |
| 929 | { |
| 930 | struct ccg_dev *dev = dev_get_drvdata(pdev); |
| 931 | char *name; |
| 932 | char buf[256], *b; |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 933 | int err, i; |
| 934 | bool functionfs_enabled; |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 935 | |
| 936 | buff = skip_spaces(buff); |
| 937 | if (!*buff) |
| 938 | return -EINVAL; |
| 939 | |
| 940 | mutex_lock(&dev->mutex); |
| 941 | |
| 942 | if (dev->enabled) { |
| 943 | mutex_unlock(&dev->mutex); |
| 944 | return -EBUSY; |
| 945 | } |
| 946 | |
| 947 | INIT_LIST_HEAD(&dev->enabled_functions); |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 948 | functionfs_enabled = false; |
| 949 | for (i = 0; i < dev->max_func_num; i++) |
| 950 | dev->ffs_tab[i].used = false; |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 951 | |
| 952 | strlcpy(buf, buff, sizeof(buf)); |
| 953 | b = strim(buf); |
| 954 | |
| 955 | while (b) { |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 956 | struct ffs_obj *user_func; |
| 957 | |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 958 | name = strsep(&b, ","); |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 959 | /* handle FunctionFS implicitly */ |
| 960 | if (!strcmp(name, functionfs_function.name)) { |
| 961 | pr_err("ccg_usb: Cannot explicitly enable '%s'", name); |
| 962 | continue; |
| 963 | } |
| 964 | user_func = functionfs_find_dev(dev, name); |
| 965 | if (user_func) |
| 966 | name = functionfs_function.name; |
| 967 | err = 0; |
| 968 | if (!user_func || !functionfs_enabled) |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 969 | err = ccg_enable_function(dev, name); |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 970 | if (err) |
| 971 | pr_err("ccg_usb: Cannot enable '%s'", name); |
| 972 | else if (user_func) { |
| 973 | user_func->used = true; |
| 974 | dev->func_num++; |
| 975 | functionfs_enabled = true; |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 976 | } |
| 977 | } |
| 978 | |
| 979 | mutex_unlock(&dev->mutex); |
| 980 | |
| 981 | return size; |
| 982 | } |
| 983 | |
| 984 | static ssize_t enable_show(struct device *pdev, struct device_attribute *attr, |
| 985 | char *buf) |
| 986 | { |
| 987 | struct ccg_dev *dev = dev_get_drvdata(pdev); |
| 988 | return sprintf(buf, "%d\n", dev->enabled); |
| 989 | } |
| 990 | |
| 991 | static ssize_t enable_store(struct device *pdev, struct device_attribute *attr, |
| 992 | const char *buff, size_t size) |
| 993 | { |
| 994 | struct ccg_dev *dev = dev_get_drvdata(pdev); |
| 995 | struct usb_composite_dev *cdev = dev->cdev; |
| 996 | int enabled = 0; |
| 997 | |
| 998 | mutex_lock(&dev->mutex); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 999 | sscanf(buff, "%d", &enabled); |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 1000 | if (enabled && dev->func_num && !functionfs_all_ready(dev)) { |
| 1001 | mutex_unlock(&dev->mutex); |
| 1002 | return -ENODEV; |
| 1003 | } |
| 1004 | |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 1005 | if (enabled && !dev->enabled) { |
| 1006 | int ret; |
| 1007 | |
| 1008 | cdev->next_string_id = 0; |
| 1009 | /* |
| 1010 | * Update values in composite driver's copy of |
| 1011 | * device descriptor. |
| 1012 | */ |
| 1013 | cdev->desc.bDeviceClass = device_desc.bDeviceClass; |
| 1014 | cdev->desc.bDeviceSubClass = device_desc.bDeviceSubClass; |
| 1015 | cdev->desc.bDeviceProtocol = device_desc.bDeviceProtocol; |
| 1016 | cdev->desc.idVendor = idVendor; |
| 1017 | cdev->desc.idProduct = idProduct; |
| 1018 | cdev->desc.bcdDevice = bcdDevice; |
| 1019 | |
| 1020 | usb_add_config(cdev, &ccg_config_driver, ccg_bind_config); |
| 1021 | dev->enabled = true; |
| 1022 | ret = usb_gadget_connect(cdev->gadget); |
| 1023 | if (ret) { |
| 1024 | dev->enabled = false; |
| 1025 | usb_remove_config(cdev, &ccg_config_driver); |
| 1026 | } |
| 1027 | } else if (!enabled && dev->enabled) { |
Andrzej Pietrasiewicz | 4502798 | 2012-05-16 12:34:38 +0200 | [diff] [blame] | 1028 | reset_usb(dev); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 1029 | } else { |
| 1030 | pr_err("ccg_usb: already %s\n", |
| 1031 | dev->enabled ? "enabled" : "disabled"); |
| 1032 | } |
| 1033 | |
| 1034 | mutex_unlock(&dev->mutex); |
| 1035 | return size; |
| 1036 | } |
| 1037 | |
| 1038 | static ssize_t state_show(struct device *pdev, struct device_attribute *attr, |
| 1039 | char *buf) |
| 1040 | { |
| 1041 | struct ccg_dev *dev = dev_get_drvdata(pdev); |
| 1042 | struct usb_composite_dev *cdev = dev->cdev; |
| 1043 | char *state = "DISCONNECTED"; |
| 1044 | unsigned long flags; |
| 1045 | |
| 1046 | if (!cdev) |
| 1047 | goto out; |
| 1048 | |
| 1049 | spin_lock_irqsave(&cdev->lock, flags); |
| 1050 | if (cdev->config) |
| 1051 | state = "CONFIGURED"; |
| 1052 | else if (dev->connected) |
| 1053 | state = "CONNECTED"; |
| 1054 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1055 | out: |
| 1056 | return sprintf(buf, "%s\n", state); |
| 1057 | } |
| 1058 | |
| 1059 | #define DESCRIPTOR_ATTR(field, format_string) \ |
| 1060 | static ssize_t \ |
| 1061 | field ## _show(struct device *dev, struct device_attribute *attr, \ |
| 1062 | char *buf) \ |
| 1063 | { \ |
| 1064 | return sprintf(buf, format_string, device_desc.field); \ |
| 1065 | } \ |
| 1066 | static ssize_t \ |
| 1067 | field ## _store(struct device *dev, struct device_attribute *attr, \ |
| 1068 | const char *buf, size_t size) \ |
| 1069 | { \ |
| 1070 | int value; \ |
| 1071 | if (sscanf(buf, format_string, &value) == 1) { \ |
| 1072 | device_desc.field = value; \ |
| 1073 | return size; \ |
| 1074 | } \ |
| 1075 | return -1; \ |
| 1076 | } \ |
| 1077 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, field ## _show, field ## _store); |
| 1078 | |
| 1079 | DESCRIPTOR_ATTR(bDeviceClass, "%d\n") |
| 1080 | DESCRIPTOR_ATTR(bDeviceSubClass, "%d\n") |
| 1081 | DESCRIPTOR_ATTR(bDeviceProtocol, "%d\n") |
| 1082 | |
| 1083 | static DEVICE_ATTR(functions, S_IRUGO | S_IWUSR, functions_show, |
| 1084 | functions_store); |
| 1085 | static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, enable_show, enable_store); |
| 1086 | static DEVICE_ATTR(state, S_IRUGO, state_show, NULL); |
| 1087 | |
| 1088 | static struct device_attribute *ccg_usb_attributes[] = { |
| 1089 | &dev_attr_bDeviceClass, |
| 1090 | &dev_attr_bDeviceSubClass, |
| 1091 | &dev_attr_bDeviceProtocol, |
| 1092 | &dev_attr_functions, |
| 1093 | &dev_attr_enable, |
| 1094 | &dev_attr_state, |
| 1095 | NULL |
| 1096 | }; |
| 1097 | |
| 1098 | /*-------------------------------------------------------------------------*/ |
| 1099 | /* Composite driver */ |
| 1100 | |
| 1101 | static int ccg_bind_config(struct usb_configuration *c) |
| 1102 | { |
| 1103 | struct ccg_dev *dev = _ccg_dev; |
Devendra Naga | 7505817 | 2012-09-13 13:09:29 -0400 | [diff] [blame] | 1104 | return ccg_bind_enabled_functions(dev, c); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 1105 | } |
| 1106 | |
| 1107 | static void ccg_unbind_config(struct usb_configuration *c) |
| 1108 | { |
| 1109 | struct ccg_dev *dev = _ccg_dev; |
| 1110 | |
| 1111 | ccg_unbind_enabled_functions(dev, c); |
| 1112 | |
| 1113 | usb_ep_autoconfig_reset(dev->cdev->gadget); |
| 1114 | } |
| 1115 | |
| 1116 | static int ccg_bind(struct usb_composite_dev *cdev) |
| 1117 | { |
| 1118 | struct ccg_dev *dev = _ccg_dev; |
| 1119 | struct usb_gadget *gadget = cdev->gadget; |
| 1120 | int gcnum, ret; |
| 1121 | |
| 1122 | /* |
| 1123 | * Start disconnected. Userspace will connect the gadget once |
| 1124 | * it is done configuring the functions. |
| 1125 | */ |
| 1126 | usb_gadget_disconnect(gadget); |
| 1127 | |
| 1128 | ret = ccg_init_functions(dev->functions, cdev); |
| 1129 | if (ret) |
| 1130 | return ret; |
| 1131 | |
| 1132 | gcnum = usb_gadget_controller_number(gadget); |
| 1133 | if (gcnum >= 0) |
| 1134 | device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); |
| 1135 | else { |
David Murray | e97e6c4 | 2012-07-06 09:20:43 -0500 | [diff] [blame] | 1136 | pr_warn("%s: controller '%s' not recognized\n", |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 1137 | longname, gadget->name); |
| 1138 | device_desc.bcdDevice = __constant_cpu_to_le16(0x9999); |
| 1139 | } |
| 1140 | |
| 1141 | usb_gadget_set_selfpowered(gadget); |
| 1142 | dev->cdev = cdev; |
| 1143 | |
| 1144 | return 0; |
| 1145 | } |
| 1146 | |
| 1147 | static int ccg_usb_unbind(struct usb_composite_dev *cdev) |
| 1148 | { |
| 1149 | struct ccg_dev *dev = _ccg_dev; |
| 1150 | |
| 1151 | cancel_work_sync(&dev->work); |
| 1152 | ccg_cleanup_functions(dev->functions); |
| 1153 | return 0; |
| 1154 | } |
| 1155 | |
| 1156 | static struct usb_composite_driver ccg_usb_driver = { |
| 1157 | .name = "configurable_usb", |
| 1158 | .dev = &device_desc, |
Sebastian Andrzej Siewior | 03e42bd | 2012-09-06 20:11:04 +0200 | [diff] [blame] | 1159 | .bind = ccg_bind, |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 1160 | .unbind = ccg_usb_unbind, |
| 1161 | .needs_serial = true, |
| 1162 | .iManufacturer = "Linux Foundation", |
| 1163 | .iProduct = longname, |
| 1164 | .iSerialNumber = "1234567890123456", |
| 1165 | }; |
| 1166 | |
| 1167 | static int ccg_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *c) |
| 1168 | { |
| 1169 | struct ccg_dev *dev = _ccg_dev; |
| 1170 | struct usb_composite_dev *cdev = get_gadget_data(gadget); |
| 1171 | struct usb_request *req = cdev->req; |
| 1172 | struct ccg_usb_function *f; |
| 1173 | int value = -EOPNOTSUPP; |
| 1174 | unsigned long flags; |
| 1175 | |
| 1176 | req->zero = 0; |
| 1177 | req->complete = composite_setup_complete; |
| 1178 | req->length = 0; |
| 1179 | gadget->ep0->driver_data = cdev; |
| 1180 | |
| 1181 | list_for_each_entry(f, &dev->enabled_functions, enabled_list) { |
| 1182 | if (f->ctrlrequest) { |
| 1183 | value = f->ctrlrequest(f, cdev, c); |
| 1184 | if (value >= 0) |
| 1185 | break; |
| 1186 | } |
| 1187 | } |
| 1188 | |
| 1189 | if (value < 0) |
| 1190 | value = composite_setup(gadget, c); |
| 1191 | |
| 1192 | spin_lock_irqsave(&cdev->lock, flags); |
| 1193 | if (!dev->connected) { |
| 1194 | dev->connected = 1; |
| 1195 | schedule_work(&dev->work); |
| 1196 | } else if (c->bRequest == USB_REQ_SET_CONFIGURATION && |
| 1197 | cdev->config) { |
| 1198 | schedule_work(&dev->work); |
| 1199 | } |
| 1200 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1201 | |
| 1202 | return value; |
| 1203 | } |
| 1204 | |
| 1205 | static void ccg_disconnect(struct usb_gadget *gadget) |
| 1206 | { |
| 1207 | struct ccg_dev *dev = _ccg_dev; |
| 1208 | struct usb_composite_dev *cdev = get_gadget_data(gadget); |
| 1209 | unsigned long flags; |
| 1210 | |
| 1211 | composite_disconnect(gadget); |
| 1212 | |
| 1213 | spin_lock_irqsave(&cdev->lock, flags); |
| 1214 | dev->connected = 0; |
| 1215 | schedule_work(&dev->work); |
| 1216 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1217 | } |
| 1218 | |
| 1219 | static int ccg_create_device(struct ccg_dev *dev) |
| 1220 | { |
| 1221 | struct device_attribute **attrs = ccg_usb_attributes; |
| 1222 | struct device_attribute *attr; |
| 1223 | int err; |
| 1224 | |
| 1225 | dev->dev = device_create(ccg_class, NULL, MKDEV(0, 0), NULL, "ccg0"); |
| 1226 | if (IS_ERR(dev->dev)) |
| 1227 | return PTR_ERR(dev->dev); |
| 1228 | |
| 1229 | dev_set_drvdata(dev->dev, dev); |
| 1230 | |
| 1231 | while ((attr = *attrs++)) { |
| 1232 | err = device_create_file(dev->dev, attr); |
| 1233 | if (err) { |
| 1234 | device_destroy(ccg_class, dev->dev->devt); |
| 1235 | return err; |
| 1236 | } |
| 1237 | } |
| 1238 | return 0; |
| 1239 | } |
| 1240 | |
| 1241 | |
| 1242 | static int __init init(void) |
| 1243 | { |
| 1244 | struct ccg_dev *dev; |
| 1245 | int err; |
| 1246 | |
| 1247 | ccg_class = class_create(THIS_MODULE, "ccg_usb"); |
| 1248 | if (IS_ERR(ccg_class)) |
| 1249 | return PTR_ERR(ccg_class); |
| 1250 | |
| 1251 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
Devendra Naga | 99d4b1a | 2012-09-13 13:08:48 -0400 | [diff] [blame] | 1252 | if (!dev) { |
| 1253 | class_destroy(ccg_class); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 1254 | return -ENOMEM; |
Devendra Naga | 99d4b1a | 2012-09-13 13:08:48 -0400 | [diff] [blame] | 1255 | } |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 1256 | |
| 1257 | dev->functions = supported_functions; |
| 1258 | INIT_LIST_HEAD(&dev->enabled_functions); |
| 1259 | INIT_WORK(&dev->work, ccg_work); |
| 1260 | mutex_init(&dev->mutex); |
| 1261 | |
| 1262 | err = ccg_create_device(dev); |
| 1263 | if (err) { |
| 1264 | class_destroy(ccg_class); |
| 1265 | kfree(dev); |
| 1266 | return err; |
| 1267 | } |
| 1268 | |
| 1269 | _ccg_dev = dev; |
| 1270 | |
| 1271 | /* Override composite driver functions */ |
| 1272 | composite_driver.setup = ccg_setup; |
| 1273 | composite_driver.disconnect = ccg_disconnect; |
| 1274 | |
Sebastian Andrzej Siewior | 03e42bd | 2012-09-06 20:11:04 +0200 | [diff] [blame] | 1275 | err = usb_composite_probe(&ccg_usb_driver); |
Mike Lockwood | 332bb43 | 2012-05-16 12:34:37 +0200 | [diff] [blame] | 1276 | if (err) { |
| 1277 | class_destroy(ccg_class); |
| 1278 | kfree(dev); |
| 1279 | } |
| 1280 | |
| 1281 | return err; |
| 1282 | } |
| 1283 | module_init(init); |
| 1284 | |
| 1285 | static void __exit cleanup(void) |
| 1286 | { |
| 1287 | usb_composite_unregister(&ccg_usb_driver); |
| 1288 | class_destroy(ccg_class); |
| 1289 | kfree(_ccg_dev); |
| 1290 | _ccg_dev = NULL; |
| 1291 | } |
| 1292 | module_exit(cleanup); |