Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Gadget Function Driver for Android USB accessories |
| 3 | * |
| 4 | * Copyright (C) 2011 Google, Inc. |
| 5 | * Author: Mike Lockwood <lockwood@android.com> |
| 6 | * |
| 7 | * This software is licensed under the terms of the GNU General Public |
| 8 | * License version 2, as published by the Free Software Foundation, and |
| 9 | * may be copied, distributed, and modified under those terms. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | /* #define DEBUG */ |
| 19 | /* #define VERBOSE_DEBUG */ |
| 20 | |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/poll.h> |
| 24 | #include <linux/delay.h> |
| 25 | #include <linux/wait.h> |
| 26 | #include <linux/err.h> |
| 27 | #include <linux/interrupt.h> |
| 28 | #include <linux/kthread.h> |
| 29 | #include <linux/freezer.h> |
| 30 | |
| 31 | #include <linux/types.h> |
| 32 | #include <linux/file.h> |
| 33 | #include <linux/device.h> |
| 34 | #include <linux/miscdevice.h> |
| 35 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 36 | #include <linux/hid.h> |
| 37 | #include <linux/hiddev.h> |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 38 | #include <linux/usb.h> |
| 39 | #include <linux/usb/ch9.h> |
| 40 | #include <linux/usb/f_accessory.h> |
| 41 | |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 42 | #include <linux/configfs.h> |
| 43 | #include <linux/usb/composite.h> |
| 44 | |
| 45 | #define MAX_INST_NAME_LEN 40 |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 46 | #define BULK_BUFFER_SIZE 16384 |
| 47 | #define ACC_STRING_SIZE 256 |
| 48 | |
Mike Lockwood | b16cf28 | 2012-05-11 09:00:40 -0700 | [diff] [blame] | 49 | #define PROTOCOL_VERSION 2 |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 50 | |
| 51 | /* String IDs */ |
| 52 | #define INTERFACE_STRING_INDEX 0 |
| 53 | |
| 54 | /* number of tx and rx requests to allocate */ |
| 55 | #define TX_REQ_MAX 4 |
| 56 | #define RX_REQ_MAX 2 |
| 57 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 58 | struct acc_hid_dev { |
| 59 | struct list_head list; |
| 60 | struct hid_device *hid; |
| 61 | struct acc_dev *dev; |
| 62 | /* accessory defined ID */ |
| 63 | int id; |
| 64 | /* HID report descriptor */ |
| 65 | u8 *report_desc; |
| 66 | /* length of HID report descriptor */ |
| 67 | int report_desc_len; |
| 68 | /* number of bytes of report_desc we have received so far */ |
| 69 | int report_desc_offset; |
| 70 | }; |
| 71 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 72 | struct acc_dev { |
| 73 | struct usb_function function; |
| 74 | struct usb_composite_dev *cdev; |
| 75 | spinlock_t lock; |
| 76 | |
| 77 | struct usb_ep *ep_in; |
| 78 | struct usb_ep *ep_out; |
| 79 | |
Anson Jacob | 72ec46f | 2016-08-12 20:38:10 -0400 | [diff] [blame] | 80 | /* online indicates state of function_set_alt & function_unbind |
| 81 | * set to 1 when we connect |
| 82 | */ |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 83 | int online:1; |
Anson Jacob | 72ec46f | 2016-08-12 20:38:10 -0400 | [diff] [blame] | 84 | |
| 85 | /* disconnected indicates state of open & release |
| 86 | * Set to 1 when we disconnect. |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 87 | * Not cleared until our file is closed. |
| 88 | */ |
| 89 | int disconnected:1; |
| 90 | |
| 91 | /* strings sent by the host */ |
| 92 | char manufacturer[ACC_STRING_SIZE]; |
| 93 | char model[ACC_STRING_SIZE]; |
| 94 | char description[ACC_STRING_SIZE]; |
| 95 | char version[ACC_STRING_SIZE]; |
| 96 | char uri[ACC_STRING_SIZE]; |
| 97 | char serial[ACC_STRING_SIZE]; |
| 98 | |
| 99 | /* for acc_complete_set_string */ |
| 100 | int string_index; |
| 101 | |
| 102 | /* set to 1 if we have a pending start request */ |
| 103 | int start_requested; |
| 104 | |
Mike Lockwood | b16cf28 | 2012-05-11 09:00:40 -0700 | [diff] [blame] | 105 | int audio_mode; |
| 106 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 107 | /* synchronize access to our device file */ |
| 108 | atomic_t open_excl; |
| 109 | |
| 110 | struct list_head tx_idle; |
| 111 | |
| 112 | wait_queue_head_t read_wq; |
| 113 | wait_queue_head_t write_wq; |
| 114 | struct usb_request *rx_req[RX_REQ_MAX]; |
| 115 | int rx_done; |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 116 | |
| 117 | /* delayed work for handling ACCESSORY_START */ |
| 118 | struct delayed_work start_work; |
| 119 | |
| 120 | /* worker for registering and unregistering hid devices */ |
| 121 | struct work_struct hid_work; |
| 122 | |
| 123 | /* list of active HID devices */ |
| 124 | struct list_head hid_list; |
| 125 | |
| 126 | /* list of new HID devices to register */ |
| 127 | struct list_head new_hid_list; |
| 128 | |
| 129 | /* list of dead HID devices to unregister */ |
| 130 | struct list_head dead_hid_list; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 131 | }; |
| 132 | |
| 133 | static struct usb_interface_descriptor acc_interface_desc = { |
| 134 | .bLength = USB_DT_INTERFACE_SIZE, |
| 135 | .bDescriptorType = USB_DT_INTERFACE, |
| 136 | .bInterfaceNumber = 0, |
| 137 | .bNumEndpoints = 2, |
| 138 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, |
| 139 | .bInterfaceSubClass = USB_SUBCLASS_VENDOR_SPEC, |
| 140 | .bInterfaceProtocol = 0, |
| 141 | }; |
| 142 | |
| 143 | static struct usb_endpoint_descriptor acc_highspeed_in_desc = { |
| 144 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 145 | .bDescriptorType = USB_DT_ENDPOINT, |
| 146 | .bEndpointAddress = USB_DIR_IN, |
| 147 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 148 | .wMaxPacketSize = __constant_cpu_to_le16(512), |
| 149 | }; |
| 150 | |
| 151 | static struct usb_endpoint_descriptor acc_highspeed_out_desc = { |
| 152 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 153 | .bDescriptorType = USB_DT_ENDPOINT, |
| 154 | .bEndpointAddress = USB_DIR_OUT, |
| 155 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 156 | .wMaxPacketSize = __constant_cpu_to_le16(512), |
| 157 | }; |
| 158 | |
| 159 | static struct usb_endpoint_descriptor acc_fullspeed_in_desc = { |
| 160 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 161 | .bDescriptorType = USB_DT_ENDPOINT, |
| 162 | .bEndpointAddress = USB_DIR_IN, |
| 163 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 164 | }; |
| 165 | |
| 166 | static struct usb_endpoint_descriptor acc_fullspeed_out_desc = { |
| 167 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 168 | .bDescriptorType = USB_DT_ENDPOINT, |
| 169 | .bEndpointAddress = USB_DIR_OUT, |
| 170 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 171 | }; |
| 172 | |
| 173 | static struct usb_descriptor_header *fs_acc_descs[] = { |
| 174 | (struct usb_descriptor_header *) &acc_interface_desc, |
| 175 | (struct usb_descriptor_header *) &acc_fullspeed_in_desc, |
| 176 | (struct usb_descriptor_header *) &acc_fullspeed_out_desc, |
| 177 | NULL, |
| 178 | }; |
| 179 | |
| 180 | static struct usb_descriptor_header *hs_acc_descs[] = { |
| 181 | (struct usb_descriptor_header *) &acc_interface_desc, |
| 182 | (struct usb_descriptor_header *) &acc_highspeed_in_desc, |
| 183 | (struct usb_descriptor_header *) &acc_highspeed_out_desc, |
| 184 | NULL, |
| 185 | }; |
| 186 | |
| 187 | static struct usb_string acc_string_defs[] = { |
| 188 | [INTERFACE_STRING_INDEX].s = "Android Accessory Interface", |
| 189 | { }, /* end of list */ |
| 190 | }; |
| 191 | |
| 192 | static struct usb_gadget_strings acc_string_table = { |
| 193 | .language = 0x0409, /* en-US */ |
| 194 | .strings = acc_string_defs, |
| 195 | }; |
| 196 | |
| 197 | static struct usb_gadget_strings *acc_strings[] = { |
| 198 | &acc_string_table, |
| 199 | NULL, |
| 200 | }; |
| 201 | |
| 202 | /* temporary variable used between acc_open() and acc_gadget_bind() */ |
| 203 | static struct acc_dev *_acc_dev; |
| 204 | |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 205 | struct acc_instance { |
| 206 | struct usb_function_instance func_inst; |
| 207 | const char *name; |
| 208 | }; |
| 209 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 210 | static inline struct acc_dev *func_to_dev(struct usb_function *f) |
| 211 | { |
| 212 | return container_of(f, struct acc_dev, function); |
| 213 | } |
| 214 | |
| 215 | static struct usb_request *acc_request_new(struct usb_ep *ep, int buffer_size) |
| 216 | { |
| 217 | struct usb_request *req = usb_ep_alloc_request(ep, GFP_KERNEL); |
Anson Jacob | 051584e | 2016-11-11 01:10:04 -0500 | [diff] [blame] | 218 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 219 | if (!req) |
| 220 | return NULL; |
| 221 | |
| 222 | /* now allocate buffers for the requests */ |
| 223 | req->buf = kmalloc(buffer_size, GFP_KERNEL); |
| 224 | if (!req->buf) { |
| 225 | usb_ep_free_request(ep, req); |
| 226 | return NULL; |
| 227 | } |
| 228 | |
| 229 | return req; |
| 230 | } |
| 231 | |
| 232 | static void acc_request_free(struct usb_request *req, struct usb_ep *ep) |
| 233 | { |
| 234 | if (req) { |
| 235 | kfree(req->buf); |
| 236 | usb_ep_free_request(ep, req); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | /* add a request to the tail of a list */ |
| 241 | static void req_put(struct acc_dev *dev, struct list_head *head, |
| 242 | struct usb_request *req) |
| 243 | { |
| 244 | unsigned long flags; |
| 245 | |
| 246 | spin_lock_irqsave(&dev->lock, flags); |
| 247 | list_add_tail(&req->list, head); |
| 248 | spin_unlock_irqrestore(&dev->lock, flags); |
| 249 | } |
| 250 | |
| 251 | /* remove a request from the head of a list */ |
| 252 | static struct usb_request *req_get(struct acc_dev *dev, struct list_head *head) |
| 253 | { |
| 254 | unsigned long flags; |
| 255 | struct usb_request *req; |
| 256 | |
| 257 | spin_lock_irqsave(&dev->lock, flags); |
| 258 | if (list_empty(head)) { |
| 259 | req = 0; |
| 260 | } else { |
| 261 | req = list_first_entry(head, struct usb_request, list); |
| 262 | list_del(&req->list); |
| 263 | } |
| 264 | spin_unlock_irqrestore(&dev->lock, flags); |
| 265 | return req; |
| 266 | } |
| 267 | |
| 268 | static void acc_set_disconnected(struct acc_dev *dev) |
| 269 | { |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 270 | dev->disconnected = 1; |
| 271 | } |
| 272 | |
| 273 | static void acc_complete_in(struct usb_ep *ep, struct usb_request *req) |
| 274 | { |
| 275 | struct acc_dev *dev = _acc_dev; |
| 276 | |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 277 | if (req->status == -ESHUTDOWN) { |
| 278 | pr_debug("acc_complete_in set disconnected"); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 279 | acc_set_disconnected(dev); |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 280 | } |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 281 | |
| 282 | req_put(dev, &dev->tx_idle, req); |
| 283 | |
| 284 | wake_up(&dev->write_wq); |
| 285 | } |
| 286 | |
| 287 | static void acc_complete_out(struct usb_ep *ep, struct usb_request *req) |
| 288 | { |
| 289 | struct acc_dev *dev = _acc_dev; |
| 290 | |
| 291 | dev->rx_done = 1; |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 292 | if (req->status == -ESHUTDOWN) { |
| 293 | pr_debug("acc_complete_out set disconnected"); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 294 | acc_set_disconnected(dev); |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 295 | } |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 296 | |
| 297 | wake_up(&dev->read_wq); |
| 298 | } |
| 299 | |
| 300 | static void acc_complete_set_string(struct usb_ep *ep, struct usb_request *req) |
| 301 | { |
| 302 | struct acc_dev *dev = ep->driver_data; |
| 303 | char *string_dest = NULL; |
| 304 | int length = req->actual; |
| 305 | |
| 306 | if (req->status != 0) { |
| 307 | pr_err("acc_complete_set_string, err %d\n", req->status); |
| 308 | return; |
| 309 | } |
| 310 | |
| 311 | switch (dev->string_index) { |
| 312 | case ACCESSORY_STRING_MANUFACTURER: |
| 313 | string_dest = dev->manufacturer; |
| 314 | break; |
| 315 | case ACCESSORY_STRING_MODEL: |
| 316 | string_dest = dev->model; |
| 317 | break; |
| 318 | case ACCESSORY_STRING_DESCRIPTION: |
| 319 | string_dest = dev->description; |
| 320 | break; |
| 321 | case ACCESSORY_STRING_VERSION: |
| 322 | string_dest = dev->version; |
| 323 | break; |
| 324 | case ACCESSORY_STRING_URI: |
| 325 | string_dest = dev->uri; |
| 326 | break; |
| 327 | case ACCESSORY_STRING_SERIAL: |
| 328 | string_dest = dev->serial; |
| 329 | break; |
| 330 | } |
| 331 | if (string_dest) { |
| 332 | unsigned long flags; |
| 333 | |
| 334 | if (length >= ACC_STRING_SIZE) |
| 335 | length = ACC_STRING_SIZE - 1; |
| 336 | |
| 337 | spin_lock_irqsave(&dev->lock, flags); |
| 338 | memcpy(string_dest, req->buf, length); |
| 339 | /* ensure zero termination */ |
| 340 | string_dest[length] = 0; |
| 341 | spin_unlock_irqrestore(&dev->lock, flags); |
| 342 | } else { |
| 343 | pr_err("unknown accessory string index %d\n", |
| 344 | dev->string_index); |
| 345 | } |
| 346 | } |
| 347 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 348 | static void acc_complete_set_hid_report_desc(struct usb_ep *ep, |
| 349 | struct usb_request *req) |
| 350 | { |
| 351 | struct acc_hid_dev *hid = req->context; |
| 352 | struct acc_dev *dev = hid->dev; |
| 353 | int length = req->actual; |
| 354 | |
| 355 | if (req->status != 0) { |
| 356 | pr_err("acc_complete_set_hid_report_desc, err %d\n", |
| 357 | req->status); |
| 358 | return; |
| 359 | } |
| 360 | |
| 361 | memcpy(hid->report_desc + hid->report_desc_offset, req->buf, length); |
| 362 | hid->report_desc_offset += length; |
| 363 | if (hid->report_desc_offset == hid->report_desc_len) { |
| 364 | /* After we have received the entire report descriptor |
| 365 | * we schedule work to initialize the HID device |
| 366 | */ |
| 367 | schedule_work(&dev->hid_work); |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | static void acc_complete_send_hid_event(struct usb_ep *ep, |
| 372 | struct usb_request *req) |
| 373 | { |
| 374 | struct acc_hid_dev *hid = req->context; |
| 375 | int length = req->actual; |
| 376 | |
| 377 | if (req->status != 0) { |
| 378 | pr_err("acc_complete_send_hid_event, err %d\n", req->status); |
| 379 | return; |
| 380 | } |
| 381 | |
| 382 | hid_report_raw_event(hid->hid, HID_INPUT_REPORT, req->buf, length, 1); |
| 383 | } |
| 384 | |
| 385 | static int acc_hid_parse(struct hid_device *hid) |
| 386 | { |
| 387 | struct acc_hid_dev *hdev = hid->driver_data; |
| 388 | |
| 389 | hid_parse_report(hid, hdev->report_desc, hdev->report_desc_len); |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static int acc_hid_start(struct hid_device *hid) |
| 394 | { |
| 395 | return 0; |
| 396 | } |
| 397 | |
| 398 | static void acc_hid_stop(struct hid_device *hid) |
| 399 | { |
| 400 | } |
| 401 | |
| 402 | static int acc_hid_open(struct hid_device *hid) |
| 403 | { |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | static void acc_hid_close(struct hid_device *hid) |
| 408 | { |
| 409 | } |
| 410 | |
Mark Kuo | 90f58ea | 2016-01-11 19:07:12 +0800 | [diff] [blame] | 411 | static int acc_hid_raw_request(struct hid_device *hid, unsigned char reportnum, |
| 412 | __u8 *buf, size_t len, unsigned char rtype, int reqtype) |
| 413 | { |
| 414 | return 0; |
| 415 | } |
| 416 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 417 | static struct hid_ll_driver acc_hid_ll_driver = { |
| 418 | .parse = acc_hid_parse, |
| 419 | .start = acc_hid_start, |
| 420 | .stop = acc_hid_stop, |
| 421 | .open = acc_hid_open, |
| 422 | .close = acc_hid_close, |
Mark Kuo | 90f58ea | 2016-01-11 19:07:12 +0800 | [diff] [blame] | 423 | .raw_request = acc_hid_raw_request, |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 424 | }; |
| 425 | |
| 426 | static struct acc_hid_dev *acc_hid_new(struct acc_dev *dev, |
| 427 | int id, int desc_len) |
| 428 | { |
| 429 | struct acc_hid_dev *hdev; |
| 430 | |
| 431 | hdev = kzalloc(sizeof(*hdev), GFP_ATOMIC); |
| 432 | if (!hdev) |
| 433 | return NULL; |
| 434 | hdev->report_desc = kzalloc(desc_len, GFP_ATOMIC); |
| 435 | if (!hdev->report_desc) { |
| 436 | kfree(hdev); |
| 437 | return NULL; |
| 438 | } |
| 439 | hdev->dev = dev; |
| 440 | hdev->id = id; |
| 441 | hdev->report_desc_len = desc_len; |
| 442 | |
| 443 | return hdev; |
| 444 | } |
| 445 | |
| 446 | static struct acc_hid_dev *acc_hid_get(struct list_head *list, int id) |
| 447 | { |
| 448 | struct acc_hid_dev *hid; |
| 449 | |
| 450 | list_for_each_entry(hid, list, list) { |
| 451 | if (hid->id == id) |
| 452 | return hid; |
| 453 | } |
| 454 | return NULL; |
| 455 | } |
| 456 | |
| 457 | static int acc_register_hid(struct acc_dev *dev, int id, int desc_length) |
| 458 | { |
| 459 | struct acc_hid_dev *hid; |
| 460 | unsigned long flags; |
| 461 | |
| 462 | /* report descriptor length must be > 0 */ |
| 463 | if (desc_length <= 0) |
| 464 | return -EINVAL; |
| 465 | |
| 466 | spin_lock_irqsave(&dev->lock, flags); |
| 467 | /* replace HID if one already exists with this ID */ |
| 468 | hid = acc_hid_get(&dev->hid_list, id); |
| 469 | if (!hid) |
| 470 | hid = acc_hid_get(&dev->new_hid_list, id); |
| 471 | if (hid) |
| 472 | list_move(&hid->list, &dev->dead_hid_list); |
| 473 | |
| 474 | hid = acc_hid_new(dev, id, desc_length); |
| 475 | if (!hid) { |
| 476 | spin_unlock_irqrestore(&dev->lock, flags); |
| 477 | return -ENOMEM; |
| 478 | } |
| 479 | |
| 480 | list_add(&hid->list, &dev->new_hid_list); |
| 481 | spin_unlock_irqrestore(&dev->lock, flags); |
| 482 | |
| 483 | /* schedule work to register the HID device */ |
| 484 | schedule_work(&dev->hid_work); |
| 485 | return 0; |
| 486 | } |
| 487 | |
| 488 | static int acc_unregister_hid(struct acc_dev *dev, int id) |
| 489 | { |
| 490 | struct acc_hid_dev *hid; |
| 491 | unsigned long flags; |
| 492 | |
| 493 | spin_lock_irqsave(&dev->lock, flags); |
| 494 | hid = acc_hid_get(&dev->hid_list, id); |
| 495 | if (!hid) |
| 496 | hid = acc_hid_get(&dev->new_hid_list, id); |
| 497 | if (!hid) { |
| 498 | spin_unlock_irqrestore(&dev->lock, flags); |
| 499 | return -EINVAL; |
| 500 | } |
| 501 | |
| 502 | list_move(&hid->list, &dev->dead_hid_list); |
| 503 | spin_unlock_irqrestore(&dev->lock, flags); |
| 504 | |
| 505 | schedule_work(&dev->hid_work); |
| 506 | return 0; |
| 507 | } |
| 508 | |
Todd Poynor | 4ce5e65 | 2012-11-28 13:03:40 -0800 | [diff] [blame] | 509 | static int create_bulk_endpoints(struct acc_dev *dev, |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 510 | struct usb_endpoint_descriptor *in_desc, |
| 511 | struct usb_endpoint_descriptor *out_desc) |
| 512 | { |
| 513 | struct usb_composite_dev *cdev = dev->cdev; |
| 514 | struct usb_request *req; |
| 515 | struct usb_ep *ep; |
| 516 | int i; |
| 517 | |
| 518 | DBG(cdev, "create_bulk_endpoints dev: %p\n", dev); |
| 519 | |
| 520 | ep = usb_ep_autoconfig(cdev->gadget, in_desc); |
| 521 | if (!ep) { |
| 522 | DBG(cdev, "usb_ep_autoconfig for ep_in failed\n"); |
| 523 | return -ENODEV; |
| 524 | } |
| 525 | DBG(cdev, "usb_ep_autoconfig for ep_in got %s\n", ep->name); |
| 526 | ep->driver_data = dev; /* claim the endpoint */ |
| 527 | dev->ep_in = ep; |
| 528 | |
| 529 | ep = usb_ep_autoconfig(cdev->gadget, out_desc); |
| 530 | if (!ep) { |
| 531 | DBG(cdev, "usb_ep_autoconfig for ep_out failed\n"); |
| 532 | return -ENODEV; |
| 533 | } |
| 534 | DBG(cdev, "usb_ep_autoconfig for ep_out got %s\n", ep->name); |
| 535 | ep->driver_data = dev; /* claim the endpoint */ |
| 536 | dev->ep_out = ep; |
| 537 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 538 | /* now allocate requests for our endpoints */ |
| 539 | for (i = 0; i < TX_REQ_MAX; i++) { |
| 540 | req = acc_request_new(dev->ep_in, BULK_BUFFER_SIZE); |
| 541 | if (!req) |
| 542 | goto fail; |
| 543 | req->complete = acc_complete_in; |
| 544 | req_put(dev, &dev->tx_idle, req); |
| 545 | } |
| 546 | for (i = 0; i < RX_REQ_MAX; i++) { |
| 547 | req = acc_request_new(dev->ep_out, BULK_BUFFER_SIZE); |
| 548 | if (!req) |
| 549 | goto fail; |
| 550 | req->complete = acc_complete_out; |
| 551 | dev->rx_req[i] = req; |
| 552 | } |
| 553 | |
| 554 | return 0; |
| 555 | |
| 556 | fail: |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 557 | pr_err("acc_bind() could not allocate requests\n"); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 558 | while ((req = req_get(dev, &dev->tx_idle))) |
| 559 | acc_request_free(req, dev->ep_in); |
| 560 | for (i = 0; i < RX_REQ_MAX; i++) |
| 561 | acc_request_free(dev->rx_req[i], dev->ep_out); |
| 562 | return -1; |
| 563 | } |
| 564 | |
| 565 | static ssize_t acc_read(struct file *fp, char __user *buf, |
| 566 | size_t count, loff_t *pos) |
| 567 | { |
| 568 | struct acc_dev *dev = fp->private_data; |
| 569 | struct usb_request *req; |
Greg Hackmann | 1b07ec7 | 2014-02-24 10:19:13 -0800 | [diff] [blame] | 570 | ssize_t r = count; |
| 571 | unsigned xfer; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 572 | int ret = 0; |
| 573 | |
Greg Hackmann | 1b07ec7 | 2014-02-24 10:19:13 -0800 | [diff] [blame] | 574 | pr_debug("acc_read(%zu)\n", count); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 575 | |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 576 | if (dev->disconnected) { |
| 577 | pr_debug("acc_read disconnected"); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 578 | return -ENODEV; |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 579 | } |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 580 | |
| 581 | if (count > BULK_BUFFER_SIZE) |
| 582 | count = BULK_BUFFER_SIZE; |
| 583 | |
| 584 | /* we will block until we're online */ |
| 585 | pr_debug("acc_read: waiting for online\n"); |
| 586 | ret = wait_event_interruptible(dev->read_wq, dev->online); |
| 587 | if (ret < 0) { |
| 588 | r = ret; |
| 589 | goto done; |
| 590 | } |
| 591 | |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 592 | if (dev->rx_done) { |
| 593 | // last req cancelled. try to get it. |
| 594 | req = dev->rx_req[0]; |
| 595 | goto copy_data; |
| 596 | } |
| 597 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 598 | requeue_req: |
| 599 | /* queue a request */ |
| 600 | req = dev->rx_req[0]; |
| 601 | req->length = count; |
| 602 | dev->rx_done = 0; |
| 603 | ret = usb_ep_queue(dev->ep_out, req, GFP_KERNEL); |
| 604 | if (ret < 0) { |
| 605 | r = -EIO; |
| 606 | goto done; |
| 607 | } else { |
| 608 | pr_debug("rx %p queue\n", req); |
| 609 | } |
| 610 | |
| 611 | /* wait for a request to complete */ |
| 612 | ret = wait_event_interruptible(dev->read_wq, dev->rx_done); |
| 613 | if (ret < 0) { |
| 614 | r = ret; |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 615 | ret = usb_ep_dequeue(dev->ep_out, req); |
| 616 | if (ret != 0) { |
| 617 | // cancel failed. There can be a data already received. |
| 618 | // it will be retrieved in the next read. |
| 619 | pr_debug("acc_read: cancelling failed %d", ret); |
| 620 | } |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 621 | goto done; |
| 622 | } |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 623 | |
| 624 | copy_data: |
| 625 | dev->rx_done = 0; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 626 | if (dev->online) { |
| 627 | /* If we got a 0-len packet, throw it back and try again. */ |
| 628 | if (req->actual == 0) |
| 629 | goto requeue_req; |
| 630 | |
Greg Hackmann | 1b07ec7 | 2014-02-24 10:19:13 -0800 | [diff] [blame] | 631 | pr_debug("rx %p %u\n", req, req->actual); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 632 | xfer = (req->actual < count) ? req->actual : count; |
| 633 | r = xfer; |
| 634 | if (copy_to_user(buf, req->buf, xfer)) |
| 635 | r = -EFAULT; |
| 636 | } else |
| 637 | r = -EIO; |
| 638 | |
| 639 | done: |
Greg Hackmann | 1b07ec7 | 2014-02-24 10:19:13 -0800 | [diff] [blame] | 640 | pr_debug("acc_read returning %zd\n", r); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 641 | return r; |
| 642 | } |
| 643 | |
| 644 | static ssize_t acc_write(struct file *fp, const char __user *buf, |
| 645 | size_t count, loff_t *pos) |
| 646 | { |
| 647 | struct acc_dev *dev = fp->private_data; |
| 648 | struct usb_request *req = 0; |
Greg Hackmann | 1b07ec7 | 2014-02-24 10:19:13 -0800 | [diff] [blame] | 649 | ssize_t r = count; |
| 650 | unsigned xfer; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 651 | int ret; |
| 652 | |
Greg Hackmann | 1b07ec7 | 2014-02-24 10:19:13 -0800 | [diff] [blame] | 653 | pr_debug("acc_write(%zu)\n", count); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 654 | |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 655 | if (!dev->online || dev->disconnected) { |
| 656 | pr_debug("acc_write disconnected or not online"); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 657 | return -ENODEV; |
keunyoung | 6427ac4 | 2014-01-29 12:41:50 -0800 | [diff] [blame] | 658 | } |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 659 | |
| 660 | while (count > 0) { |
| 661 | if (!dev->online) { |
| 662 | pr_debug("acc_write dev->error\n"); |
| 663 | r = -EIO; |
| 664 | break; |
| 665 | } |
| 666 | |
| 667 | /* get an idle tx request to use */ |
| 668 | req = 0; |
| 669 | ret = wait_event_interruptible(dev->write_wq, |
| 670 | ((req = req_get(dev, &dev->tx_idle)) || !dev->online)); |
| 671 | if (!req) { |
| 672 | r = ret; |
| 673 | break; |
| 674 | } |
| 675 | |
Anson Jacob | 64d81a2 | 2014-06-23 19:07:44 +0800 | [diff] [blame] | 676 | if (count > BULK_BUFFER_SIZE) { |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 677 | xfer = BULK_BUFFER_SIZE; |
Anson Jacob | 64d81a2 | 2014-06-23 19:07:44 +0800 | [diff] [blame] | 678 | /* ZLP, They will be more TX requests so not yet. */ |
| 679 | req->zero = 0; |
| 680 | } else { |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 681 | xfer = count; |
Anson Jacob | 64d81a2 | 2014-06-23 19:07:44 +0800 | [diff] [blame] | 682 | /* If the data length is a multple of the |
| 683 | * maxpacket size then send a zero length packet(ZLP). |
| 684 | */ |
| 685 | req->zero = ((xfer % dev->ep_in->maxpacket) == 0); |
| 686 | } |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 687 | if (copy_from_user(req->buf, buf, xfer)) { |
| 688 | r = -EFAULT; |
| 689 | break; |
| 690 | } |
| 691 | |
| 692 | req->length = xfer; |
| 693 | ret = usb_ep_queue(dev->ep_in, req, GFP_KERNEL); |
| 694 | if (ret < 0) { |
| 695 | pr_debug("acc_write: xfer error %d\n", ret); |
| 696 | r = -EIO; |
| 697 | break; |
| 698 | } |
| 699 | |
| 700 | buf += xfer; |
| 701 | count -= xfer; |
| 702 | |
| 703 | /* zero this so we don't try to free it on error exit */ |
| 704 | req = 0; |
| 705 | } |
| 706 | |
| 707 | if (req) |
| 708 | req_put(dev, &dev->tx_idle, req); |
| 709 | |
Greg Hackmann | 1b07ec7 | 2014-02-24 10:19:13 -0800 | [diff] [blame] | 710 | pr_debug("acc_write returning %zd\n", r); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 711 | return r; |
| 712 | } |
| 713 | |
| 714 | static long acc_ioctl(struct file *fp, unsigned code, unsigned long value) |
| 715 | { |
| 716 | struct acc_dev *dev = fp->private_data; |
| 717 | char *src = NULL; |
| 718 | int ret; |
| 719 | |
| 720 | switch (code) { |
| 721 | case ACCESSORY_GET_STRING_MANUFACTURER: |
| 722 | src = dev->manufacturer; |
| 723 | break; |
| 724 | case ACCESSORY_GET_STRING_MODEL: |
| 725 | src = dev->model; |
| 726 | break; |
| 727 | case ACCESSORY_GET_STRING_DESCRIPTION: |
| 728 | src = dev->description; |
| 729 | break; |
| 730 | case ACCESSORY_GET_STRING_VERSION: |
| 731 | src = dev->version; |
| 732 | break; |
| 733 | case ACCESSORY_GET_STRING_URI: |
| 734 | src = dev->uri; |
| 735 | break; |
| 736 | case ACCESSORY_GET_STRING_SERIAL: |
| 737 | src = dev->serial; |
| 738 | break; |
| 739 | case ACCESSORY_IS_START_REQUESTED: |
| 740 | return dev->start_requested; |
Mike Lockwood | b16cf28 | 2012-05-11 09:00:40 -0700 | [diff] [blame] | 741 | case ACCESSORY_GET_AUDIO_MODE: |
| 742 | return dev->audio_mode; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 743 | } |
| 744 | if (!src) |
| 745 | return -EINVAL; |
| 746 | |
| 747 | ret = strlen(src) + 1; |
| 748 | if (copy_to_user((void __user *)value, src, ret)) |
| 749 | ret = -EFAULT; |
| 750 | return ret; |
| 751 | } |
| 752 | |
| 753 | static int acc_open(struct inode *ip, struct file *fp) |
| 754 | { |
| 755 | printk(KERN_INFO "acc_open\n"); |
| 756 | if (atomic_xchg(&_acc_dev->open_excl, 1)) |
| 757 | return -EBUSY; |
| 758 | |
| 759 | _acc_dev->disconnected = 0; |
| 760 | fp->private_data = _acc_dev; |
| 761 | return 0; |
| 762 | } |
| 763 | |
| 764 | static int acc_release(struct inode *ip, struct file *fp) |
| 765 | { |
| 766 | printk(KERN_INFO "acc_release\n"); |
| 767 | |
| 768 | WARN_ON(!atomic_xchg(&_acc_dev->open_excl, 0)); |
Anson Jacob | 72ec46f | 2016-08-12 20:38:10 -0400 | [diff] [blame] | 769 | /* indicate that we are disconnected |
| 770 | * still could be online so don't touch online flag |
| 771 | */ |
| 772 | _acc_dev->disconnected = 1; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 773 | return 0; |
| 774 | } |
| 775 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 776 | /* file operations for /dev/usb_accessory */ |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 777 | static const struct file_operations acc_fops = { |
| 778 | .owner = THIS_MODULE, |
| 779 | .read = acc_read, |
| 780 | .write = acc_write, |
| 781 | .unlocked_ioctl = acc_ioctl, |
| 782 | .open = acc_open, |
| 783 | .release = acc_release, |
| 784 | }; |
| 785 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 786 | static int acc_hid_probe(struct hid_device *hdev, |
| 787 | const struct hid_device_id *id) |
| 788 | { |
| 789 | int ret; |
| 790 | |
| 791 | ret = hid_parse(hdev); |
| 792 | if (ret) |
| 793 | return ret; |
| 794 | return hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
| 795 | } |
| 796 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 797 | static struct miscdevice acc_device = { |
| 798 | .minor = MISC_DYNAMIC_MINOR, |
| 799 | .name = "usb_accessory", |
| 800 | .fops = &acc_fops, |
| 801 | }; |
| 802 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 803 | static const struct hid_device_id acc_hid_table[] = { |
| 804 | { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) }, |
| 805 | { } |
| 806 | }; |
| 807 | |
| 808 | static struct hid_driver acc_hid_driver = { |
| 809 | .name = "USB accessory", |
| 810 | .id_table = acc_hid_table, |
| 811 | .probe = acc_hid_probe, |
| 812 | }; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 813 | |
Badhri Jagan Sridharan | ca95b3e | 2017-07-21 14:58:16 -0700 | [diff] [blame] | 814 | static void acc_complete_setup_noop(struct usb_ep *ep, struct usb_request *req) |
| 815 | { |
| 816 | /* |
| 817 | * Default no-op function when nothing needs to be done for the |
| 818 | * setup request |
| 819 | */ |
| 820 | } |
| 821 | |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 822 | int acc_ctrlrequest(struct usb_composite_dev *cdev, |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 823 | const struct usb_ctrlrequest *ctrl) |
| 824 | { |
| 825 | struct acc_dev *dev = _acc_dev; |
| 826 | int value = -EOPNOTSUPP; |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 827 | struct acc_hid_dev *hid; |
| 828 | int offset; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 829 | u8 b_requestType = ctrl->bRequestType; |
| 830 | u8 b_request = ctrl->bRequest; |
| 831 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
| 832 | u16 w_value = le16_to_cpu(ctrl->wValue); |
| 833 | u16 w_length = le16_to_cpu(ctrl->wLength); |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 834 | unsigned long flags; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 835 | |
| 836 | /* |
| 837 | printk(KERN_INFO "acc_ctrlrequest " |
| 838 | "%02x.%02x v%04x i%04x l%u\n", |
| 839 | b_requestType, b_request, |
| 840 | w_value, w_index, w_length); |
| 841 | */ |
| 842 | |
| 843 | if (b_requestType == (USB_DIR_OUT | USB_TYPE_VENDOR)) { |
| 844 | if (b_request == ACCESSORY_START) { |
| 845 | dev->start_requested = 1; |
| 846 | schedule_delayed_work( |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 847 | &dev->start_work, msecs_to_jiffies(10)); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 848 | value = 0; |
Badhri Jagan Sridharan | ca95b3e | 2017-07-21 14:58:16 -0700 | [diff] [blame] | 849 | cdev->req->complete = acc_complete_setup_noop; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 850 | } else if (b_request == ACCESSORY_SEND_STRING) { |
| 851 | dev->string_index = w_index; |
| 852 | cdev->gadget->ep0->driver_data = dev; |
| 853 | cdev->req->complete = acc_complete_set_string; |
| 854 | value = w_length; |
Mike Lockwood | b16cf28 | 2012-05-11 09:00:40 -0700 | [diff] [blame] | 855 | } else if (b_request == ACCESSORY_SET_AUDIO_MODE && |
| 856 | w_index == 0 && w_length == 0) { |
| 857 | dev->audio_mode = w_value; |
Badhri Jagan Sridharan | ca95b3e | 2017-07-21 14:58:16 -0700 | [diff] [blame] | 858 | cdev->req->complete = acc_complete_setup_noop; |
Mike Lockwood | b16cf28 | 2012-05-11 09:00:40 -0700 | [diff] [blame] | 859 | value = 0; |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 860 | } else if (b_request == ACCESSORY_REGISTER_HID) { |
Badhri Jagan Sridharan | ca95b3e | 2017-07-21 14:58:16 -0700 | [diff] [blame] | 861 | cdev->req->complete = acc_complete_setup_noop; |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 862 | value = acc_register_hid(dev, w_value, w_index); |
| 863 | } else if (b_request == ACCESSORY_UNREGISTER_HID) { |
Badhri Jagan Sridharan | ca95b3e | 2017-07-21 14:58:16 -0700 | [diff] [blame] | 864 | cdev->req->complete = acc_complete_setup_noop; |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 865 | value = acc_unregister_hid(dev, w_value); |
| 866 | } else if (b_request == ACCESSORY_SET_HID_REPORT_DESC) { |
| 867 | spin_lock_irqsave(&dev->lock, flags); |
| 868 | hid = acc_hid_get(&dev->new_hid_list, w_value); |
| 869 | spin_unlock_irqrestore(&dev->lock, flags); |
| 870 | if (!hid) { |
| 871 | value = -EINVAL; |
| 872 | goto err; |
| 873 | } |
| 874 | offset = w_index; |
| 875 | if (offset != hid->report_desc_offset |
| 876 | || offset + w_length > hid->report_desc_len) { |
| 877 | value = -EINVAL; |
| 878 | goto err; |
| 879 | } |
| 880 | cdev->req->context = hid; |
| 881 | cdev->req->complete = acc_complete_set_hid_report_desc; |
| 882 | value = w_length; |
| 883 | } else if (b_request == ACCESSORY_SEND_HID_EVENT) { |
| 884 | spin_lock_irqsave(&dev->lock, flags); |
| 885 | hid = acc_hid_get(&dev->hid_list, w_value); |
| 886 | spin_unlock_irqrestore(&dev->lock, flags); |
| 887 | if (!hid) { |
| 888 | value = -EINVAL; |
| 889 | goto err; |
| 890 | } |
| 891 | cdev->req->context = hid; |
| 892 | cdev->req->complete = acc_complete_send_hid_event; |
| 893 | value = w_length; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 894 | } |
| 895 | } else if (b_requestType == (USB_DIR_IN | USB_TYPE_VENDOR)) { |
| 896 | if (b_request == ACCESSORY_GET_PROTOCOL) { |
| 897 | *((u16 *)cdev->req->buf) = PROTOCOL_VERSION; |
| 898 | value = sizeof(u16); |
Badhri Jagan Sridharan | ca95b3e | 2017-07-21 14:58:16 -0700 | [diff] [blame] | 899 | cdev->req->complete = acc_complete_setup_noop; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 900 | /* clear any string left over from a previous session */ |
| 901 | memset(dev->manufacturer, 0, sizeof(dev->manufacturer)); |
| 902 | memset(dev->model, 0, sizeof(dev->model)); |
| 903 | memset(dev->description, 0, sizeof(dev->description)); |
| 904 | memset(dev->version, 0, sizeof(dev->version)); |
| 905 | memset(dev->uri, 0, sizeof(dev->uri)); |
| 906 | memset(dev->serial, 0, sizeof(dev->serial)); |
| 907 | dev->start_requested = 0; |
Mike Lockwood | b16cf28 | 2012-05-11 09:00:40 -0700 | [diff] [blame] | 908 | dev->audio_mode = 0; |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 909 | } |
| 910 | } |
| 911 | |
| 912 | if (value >= 0) { |
| 913 | cdev->req->zero = 0; |
| 914 | cdev->req->length = value; |
| 915 | value = usb_ep_queue(cdev->gadget->ep0, cdev->req, GFP_ATOMIC); |
| 916 | if (value < 0) |
| 917 | ERROR(cdev, "%s setup response queue error\n", |
| 918 | __func__); |
| 919 | } |
| 920 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 921 | err: |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 922 | if (value == -EOPNOTSUPP) |
| 923 | VDBG(cdev, |
| 924 | "unknown class-specific control req " |
| 925 | "%02x.%02x v%04x i%04x l%u\n", |
| 926 | ctrl->bRequestType, ctrl->bRequest, |
| 927 | w_value, w_index, w_length); |
| 928 | return value; |
| 929 | } |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 930 | EXPORT_SYMBOL_GPL(acc_ctrlrequest); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 931 | |
| 932 | static int |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 933 | __acc_function_bind(struct usb_configuration *c, |
| 934 | struct usb_function *f, bool configfs) |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 935 | { |
| 936 | struct usb_composite_dev *cdev = c->cdev; |
| 937 | struct acc_dev *dev = func_to_dev(f); |
| 938 | int id; |
| 939 | int ret; |
| 940 | |
| 941 | DBG(cdev, "acc_function_bind dev: %p\n", dev); |
| 942 | |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 943 | if (configfs) { |
| 944 | if (acc_string_defs[INTERFACE_STRING_INDEX].id == 0) { |
| 945 | ret = usb_string_id(c->cdev); |
| 946 | if (ret < 0) |
| 947 | return ret; |
| 948 | acc_string_defs[INTERFACE_STRING_INDEX].id = ret; |
| 949 | acc_interface_desc.iInterface = ret; |
| 950 | } |
| 951 | dev->cdev = c->cdev; |
| 952 | } |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 953 | ret = hid_register_driver(&acc_hid_driver); |
| 954 | if (ret) |
| 955 | return ret; |
| 956 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 957 | dev->start_requested = 0; |
| 958 | |
| 959 | /* allocate interface ID(s) */ |
| 960 | id = usb_interface_id(c, f); |
| 961 | if (id < 0) |
| 962 | return id; |
| 963 | acc_interface_desc.bInterfaceNumber = id; |
| 964 | |
| 965 | /* allocate endpoints */ |
| 966 | ret = create_bulk_endpoints(dev, &acc_fullspeed_in_desc, |
| 967 | &acc_fullspeed_out_desc); |
| 968 | if (ret) |
| 969 | return ret; |
| 970 | |
| 971 | /* support high speed hardware */ |
| 972 | if (gadget_is_dualspeed(c->cdev->gadget)) { |
| 973 | acc_highspeed_in_desc.bEndpointAddress = |
| 974 | acc_fullspeed_in_desc.bEndpointAddress; |
| 975 | acc_highspeed_out_desc.bEndpointAddress = |
| 976 | acc_fullspeed_out_desc.bEndpointAddress; |
| 977 | } |
| 978 | |
| 979 | DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n", |
| 980 | gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full", |
| 981 | f->name, dev->ep_in->name, dev->ep_out->name); |
| 982 | return 0; |
| 983 | } |
| 984 | |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 985 | static int |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 986 | acc_function_bind_configfs(struct usb_configuration *c, |
| 987 | struct usb_function *f) { |
| 988 | return __acc_function_bind(c, f, true); |
| 989 | } |
| 990 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 991 | static void |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 992 | kill_all_hid_devices(struct acc_dev *dev) |
| 993 | { |
| 994 | struct acc_hid_dev *hid; |
| 995 | struct list_head *entry, *temp; |
| 996 | unsigned long flags; |
| 997 | |
Amit Pundir | 65758ce | 2015-01-16 05:41:10 +0530 | [diff] [blame] | 998 | /* do nothing if usb accessory device doesn't exist */ |
| 999 | if (!dev) |
| 1000 | return; |
| 1001 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 1002 | spin_lock_irqsave(&dev->lock, flags); |
| 1003 | list_for_each_safe(entry, temp, &dev->hid_list) { |
| 1004 | hid = list_entry(entry, struct acc_hid_dev, list); |
| 1005 | list_del(&hid->list); |
| 1006 | list_add(&hid->list, &dev->dead_hid_list); |
| 1007 | } |
| 1008 | list_for_each_safe(entry, temp, &dev->new_hid_list) { |
| 1009 | hid = list_entry(entry, struct acc_hid_dev, list); |
| 1010 | list_del(&hid->list); |
| 1011 | list_add(&hid->list, &dev->dead_hid_list); |
| 1012 | } |
| 1013 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1014 | |
| 1015 | schedule_work(&dev->hid_work); |
| 1016 | } |
| 1017 | |
| 1018 | static void |
| 1019 | acc_hid_unbind(struct acc_dev *dev) |
| 1020 | { |
| 1021 | hid_unregister_driver(&acc_hid_driver); |
| 1022 | kill_all_hid_devices(dev); |
| 1023 | } |
| 1024 | |
| 1025 | static void |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1026 | acc_function_unbind(struct usb_configuration *c, struct usb_function *f) |
| 1027 | { |
| 1028 | struct acc_dev *dev = func_to_dev(f); |
| 1029 | struct usb_request *req; |
| 1030 | int i; |
| 1031 | |
Anson Jacob | 72ec46f | 2016-08-12 20:38:10 -0400 | [diff] [blame] | 1032 | dev->online = 0; /* clear online flag */ |
| 1033 | wake_up(&dev->read_wq); /* unblock reads on closure */ |
| 1034 | wake_up(&dev->write_wq); /* likewise for writes */ |
| 1035 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1036 | while ((req = req_get(dev, &dev->tx_idle))) |
| 1037 | acc_request_free(req, dev->ep_in); |
| 1038 | for (i = 0; i < RX_REQ_MAX; i++) |
| 1039 | acc_request_free(dev->rx_req[i], dev->ep_out); |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 1040 | |
| 1041 | acc_hid_unbind(dev); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1042 | } |
| 1043 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 1044 | static void acc_start_work(struct work_struct *data) |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1045 | { |
| 1046 | char *envp[2] = { "ACCESSORY=START", NULL }; |
Anson Jacob | 051584e | 2016-11-11 01:10:04 -0500 | [diff] [blame] | 1047 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1048 | kobject_uevent_env(&acc_device.this_device->kobj, KOBJ_CHANGE, envp); |
| 1049 | } |
| 1050 | |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 1051 | static int acc_hid_init(struct acc_hid_dev *hdev) |
| 1052 | { |
| 1053 | struct hid_device *hid; |
| 1054 | int ret; |
| 1055 | |
| 1056 | hid = hid_allocate_device(); |
| 1057 | if (IS_ERR(hid)) |
| 1058 | return PTR_ERR(hid); |
| 1059 | |
| 1060 | hid->ll_driver = &acc_hid_ll_driver; |
| 1061 | hid->dev.parent = acc_device.this_device; |
| 1062 | |
| 1063 | hid->bus = BUS_USB; |
| 1064 | hid->vendor = HID_ANY_ID; |
| 1065 | hid->product = HID_ANY_ID; |
| 1066 | hid->driver_data = hdev; |
| 1067 | ret = hid_add_device(hid); |
| 1068 | if (ret) { |
| 1069 | pr_err("can't add hid device: %d\n", ret); |
| 1070 | hid_destroy_device(hid); |
| 1071 | return ret; |
| 1072 | } |
| 1073 | |
| 1074 | hdev->hid = hid; |
| 1075 | return 0; |
| 1076 | } |
| 1077 | |
| 1078 | static void acc_hid_delete(struct acc_hid_dev *hid) |
| 1079 | { |
| 1080 | kfree(hid->report_desc); |
| 1081 | kfree(hid); |
| 1082 | } |
| 1083 | |
| 1084 | static void acc_hid_work(struct work_struct *data) |
| 1085 | { |
| 1086 | struct acc_dev *dev = _acc_dev; |
| 1087 | struct list_head *entry, *temp; |
| 1088 | struct acc_hid_dev *hid; |
| 1089 | struct list_head new_list, dead_list; |
| 1090 | unsigned long flags; |
| 1091 | |
| 1092 | INIT_LIST_HEAD(&new_list); |
| 1093 | |
| 1094 | spin_lock_irqsave(&dev->lock, flags); |
| 1095 | |
| 1096 | /* copy hids that are ready for initialization to new_list */ |
| 1097 | list_for_each_safe(entry, temp, &dev->new_hid_list) { |
| 1098 | hid = list_entry(entry, struct acc_hid_dev, list); |
| 1099 | if (hid->report_desc_offset == hid->report_desc_len) |
| 1100 | list_move(&hid->list, &new_list); |
| 1101 | } |
| 1102 | |
| 1103 | if (list_empty(&dev->dead_hid_list)) { |
| 1104 | INIT_LIST_HEAD(&dead_list); |
| 1105 | } else { |
| 1106 | /* move all of dev->dead_hid_list to dead_list */ |
| 1107 | dead_list.prev = dev->dead_hid_list.prev; |
| 1108 | dead_list.next = dev->dead_hid_list.next; |
| 1109 | dead_list.next->prev = &dead_list; |
| 1110 | dead_list.prev->next = &dead_list; |
| 1111 | INIT_LIST_HEAD(&dev->dead_hid_list); |
| 1112 | } |
| 1113 | |
| 1114 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1115 | |
| 1116 | /* register new HID devices */ |
| 1117 | list_for_each_safe(entry, temp, &new_list) { |
| 1118 | hid = list_entry(entry, struct acc_hid_dev, list); |
| 1119 | if (acc_hid_init(hid)) { |
| 1120 | pr_err("can't add HID device %p\n", hid); |
| 1121 | acc_hid_delete(hid); |
| 1122 | } else { |
| 1123 | spin_lock_irqsave(&dev->lock, flags); |
| 1124 | list_move(&hid->list, &dev->hid_list); |
| 1125 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | /* remove dead HID devices */ |
| 1130 | list_for_each_safe(entry, temp, &dead_list) { |
| 1131 | hid = list_entry(entry, struct acc_hid_dev, list); |
| 1132 | list_del(&hid->list); |
| 1133 | if (hid->hid) |
| 1134 | hid_destroy_device(hid->hid); |
| 1135 | acc_hid_delete(hid); |
| 1136 | } |
| 1137 | } |
| 1138 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1139 | static int acc_function_set_alt(struct usb_function *f, |
| 1140 | unsigned intf, unsigned alt) |
| 1141 | { |
| 1142 | struct acc_dev *dev = func_to_dev(f); |
| 1143 | struct usb_composite_dev *cdev = f->config->cdev; |
| 1144 | int ret; |
| 1145 | |
| 1146 | DBG(cdev, "acc_function_set_alt intf: %d alt: %d\n", intf, alt); |
| 1147 | |
| 1148 | ret = config_ep_by_speed(cdev->gadget, f, dev->ep_in); |
| 1149 | if (ret) |
| 1150 | return ret; |
| 1151 | |
| 1152 | ret = usb_ep_enable(dev->ep_in); |
| 1153 | if (ret) |
| 1154 | return ret; |
| 1155 | |
| 1156 | ret = config_ep_by_speed(cdev->gadget, f, dev->ep_out); |
| 1157 | if (ret) |
| 1158 | return ret; |
| 1159 | |
| 1160 | ret = usb_ep_enable(dev->ep_out); |
| 1161 | if (ret) { |
| 1162 | usb_ep_disable(dev->ep_in); |
| 1163 | return ret; |
| 1164 | } |
| 1165 | |
| 1166 | dev->online = 1; |
Anson Jacob | 72ec46f | 2016-08-12 20:38:10 -0400 | [diff] [blame] | 1167 | dev->disconnected = 0; /* if online then not disconnected */ |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1168 | |
| 1169 | /* readers may be blocked waiting for us to go online */ |
| 1170 | wake_up(&dev->read_wq); |
| 1171 | return 0; |
| 1172 | } |
| 1173 | |
| 1174 | static void acc_function_disable(struct usb_function *f) |
| 1175 | { |
| 1176 | struct acc_dev *dev = func_to_dev(f); |
| 1177 | struct usb_composite_dev *cdev = dev->cdev; |
| 1178 | |
| 1179 | DBG(cdev, "acc_function_disable\n"); |
Anson Jacob | 72ec46f | 2016-08-12 20:38:10 -0400 | [diff] [blame] | 1180 | acc_set_disconnected(dev); /* this now only sets disconnected */ |
| 1181 | dev->online = 0; /* so now need to clear online flag here too */ |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1182 | usb_ep_disable(dev->ep_in); |
| 1183 | usb_ep_disable(dev->ep_out); |
| 1184 | |
| 1185 | /* readers may be blocked waiting for us to go online */ |
| 1186 | wake_up(&dev->read_wq); |
| 1187 | |
| 1188 | VDBG(cdev, "%s disabled\n", dev->function.name); |
| 1189 | } |
| 1190 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1191 | static int acc_setup(void) |
| 1192 | { |
| 1193 | struct acc_dev *dev; |
| 1194 | int ret; |
| 1195 | |
| 1196 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 1197 | if (!dev) |
| 1198 | return -ENOMEM; |
| 1199 | |
| 1200 | spin_lock_init(&dev->lock); |
| 1201 | init_waitqueue_head(&dev->read_wq); |
| 1202 | init_waitqueue_head(&dev->write_wq); |
| 1203 | atomic_set(&dev->open_excl, 0); |
| 1204 | INIT_LIST_HEAD(&dev->tx_idle); |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 1205 | INIT_LIST_HEAD(&dev->hid_list); |
| 1206 | INIT_LIST_HEAD(&dev->new_hid_list); |
| 1207 | INIT_LIST_HEAD(&dev->dead_hid_list); |
| 1208 | INIT_DELAYED_WORK(&dev->start_work, acc_start_work); |
| 1209 | INIT_WORK(&dev->hid_work, acc_hid_work); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1210 | |
| 1211 | /* _acc_dev must be set before calling usb_gadget_register_driver */ |
| 1212 | _acc_dev = dev; |
| 1213 | |
| 1214 | ret = misc_register(&acc_device); |
| 1215 | if (ret) |
| 1216 | goto err; |
| 1217 | |
| 1218 | return 0; |
| 1219 | |
| 1220 | err: |
| 1221 | kfree(dev); |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 1222 | pr_err("USB accessory gadget driver failed to initialize\n"); |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1223 | return ret; |
| 1224 | } |
| 1225 | |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 1226 | void acc_disconnect(void) |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 1227 | { |
| 1228 | /* unregister all HID devices if USB is disconnected */ |
| 1229 | kill_all_hid_devices(_acc_dev); |
| 1230 | } |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 1231 | EXPORT_SYMBOL_GPL(acc_disconnect); |
Mike Lockwood | 205115d | 2012-03-26 11:03:55 -0700 | [diff] [blame] | 1232 | |
Benoit Goby | 3d95527 | 2011-12-19 14:39:37 -0800 | [diff] [blame] | 1233 | static void acc_cleanup(void) |
| 1234 | { |
| 1235 | misc_deregister(&acc_device); |
| 1236 | kfree(_acc_dev); |
| 1237 | _acc_dev = NULL; |
| 1238 | } |
Badhri Jagan Sridharan | f9247ce | 2014-11-23 17:21:22 -0800 | [diff] [blame] | 1239 | static struct acc_instance *to_acc_instance(struct config_item *item) |
| 1240 | { |
| 1241 | return container_of(to_config_group(item), struct acc_instance, |
| 1242 | func_inst.group); |
| 1243 | } |
| 1244 | |
| 1245 | static void acc_attr_release(struct config_item *item) |
| 1246 | { |
| 1247 | struct acc_instance *fi_acc = to_acc_instance(item); |
| 1248 | |
| 1249 | usb_put_function_instance(&fi_acc->func_inst); |
| 1250 | } |
| 1251 | |
| 1252 | static struct configfs_item_operations acc_item_ops = { |
| 1253 | .release = acc_attr_release, |
| 1254 | }; |
| 1255 | |
| 1256 | static struct config_item_type acc_func_type = { |
| 1257 | .ct_item_ops = &acc_item_ops, |
| 1258 | .ct_owner = THIS_MODULE, |
| 1259 | }; |
| 1260 | |
| 1261 | static struct acc_instance *to_fi_acc(struct usb_function_instance *fi) |
| 1262 | { |
| 1263 | return container_of(fi, struct acc_instance, func_inst); |
| 1264 | } |
| 1265 | |
| 1266 | static int acc_set_inst_name(struct usb_function_instance *fi, const char *name) |
| 1267 | { |
| 1268 | struct acc_instance *fi_acc; |
| 1269 | char *ptr; |
| 1270 | int name_len; |
| 1271 | |
| 1272 | name_len = strlen(name) + 1; |
| 1273 | if (name_len > MAX_INST_NAME_LEN) |
| 1274 | return -ENAMETOOLONG; |
| 1275 | |
| 1276 | ptr = kstrndup(name, name_len, GFP_KERNEL); |
| 1277 | if (!ptr) |
| 1278 | return -ENOMEM; |
| 1279 | |
| 1280 | fi_acc = to_fi_acc(fi); |
| 1281 | fi_acc->name = ptr; |
| 1282 | return 0; |
| 1283 | } |
| 1284 | |
| 1285 | static void acc_free_inst(struct usb_function_instance *fi) |
| 1286 | { |
| 1287 | struct acc_instance *fi_acc; |
| 1288 | |
| 1289 | fi_acc = to_fi_acc(fi); |
| 1290 | kfree(fi_acc->name); |
| 1291 | acc_cleanup(); |
| 1292 | } |
| 1293 | |
| 1294 | static struct usb_function_instance *acc_alloc_inst(void) |
| 1295 | { |
| 1296 | struct acc_instance *fi_acc; |
| 1297 | struct acc_dev *dev; |
| 1298 | int err; |
| 1299 | |
| 1300 | fi_acc = kzalloc(sizeof(*fi_acc), GFP_KERNEL); |
| 1301 | if (!fi_acc) |
| 1302 | return ERR_PTR(-ENOMEM); |
| 1303 | fi_acc->func_inst.set_inst_name = acc_set_inst_name; |
| 1304 | fi_acc->func_inst.free_func_inst = acc_free_inst; |
| 1305 | |
| 1306 | err = acc_setup(); |
| 1307 | if (err) { |
| 1308 | kfree(fi_acc); |
| 1309 | pr_err("Error setting ACCESSORY\n"); |
| 1310 | return ERR_PTR(err); |
| 1311 | } |
| 1312 | |
| 1313 | config_group_init_type_name(&fi_acc->func_inst.group, |
| 1314 | "", &acc_func_type); |
| 1315 | dev = _acc_dev; |
| 1316 | return &fi_acc->func_inst; |
| 1317 | } |
| 1318 | |
| 1319 | static void acc_free(struct usb_function *f) |
| 1320 | { |
| 1321 | /*NO-OP: no function specific resource allocation in mtp_alloc*/ |
| 1322 | } |
| 1323 | |
| 1324 | int acc_ctrlrequest_configfs(struct usb_function *f, |
| 1325 | const struct usb_ctrlrequest *ctrl) { |
| 1326 | if (f->config != NULL && f->config->cdev != NULL) |
| 1327 | return acc_ctrlrequest(f->config->cdev, ctrl); |
| 1328 | else |
| 1329 | return -1; |
| 1330 | } |
| 1331 | |
| 1332 | static struct usb_function *acc_alloc(struct usb_function_instance *fi) |
| 1333 | { |
| 1334 | struct acc_dev *dev = _acc_dev; |
| 1335 | |
| 1336 | pr_info("acc_alloc\n"); |
| 1337 | |
| 1338 | dev->function.name = "accessory"; |
| 1339 | dev->function.strings = acc_strings, |
| 1340 | dev->function.fs_descriptors = fs_acc_descs; |
| 1341 | dev->function.hs_descriptors = hs_acc_descs; |
| 1342 | dev->function.bind = acc_function_bind_configfs; |
| 1343 | dev->function.unbind = acc_function_unbind; |
| 1344 | dev->function.set_alt = acc_function_set_alt; |
| 1345 | dev->function.disable = acc_function_disable; |
| 1346 | dev->function.free_func = acc_free; |
| 1347 | dev->function.setup = acc_ctrlrequest_configfs; |
| 1348 | |
| 1349 | return &dev->function; |
| 1350 | } |
| 1351 | DECLARE_USB_FUNCTION_INIT(accessory, acc_alloc_inst, acc_alloc); |
| 1352 | MODULE_LICENSE("GPL"); |