Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <unistd.h> |
| 20 | #include <string.h> |
| 21 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 22 | #include <linux/usb/ch9.h> |
| 23 | #include <linux/usb/functionfs.h> |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 24 | #include <sys/ioctl.h> |
| 25 | #include <sys/types.h> |
| 26 | #include <dirent.h> |
| 27 | #include <errno.h> |
| 28 | |
| 29 | #include "sysdeps.h" |
| 30 | |
| 31 | #define TRACE_TAG TRACE_USB |
| 32 | #include "adb.h" |
| 33 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 34 | #define MAX_PACKET_SIZE_FS 64 |
| 35 | #define MAX_PACKET_SIZE_HS 512 |
| 36 | |
| 37 | #define cpu_to_le16(x) htole16(x) |
| 38 | #define cpu_to_le32(x) htole32(x) |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 39 | |
| 40 | struct usb_handle |
| 41 | { |
| 42 | int fd; |
| 43 | adb_cond_t notify; |
| 44 | adb_mutex_t lock; |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 45 | |
| 46 | int (*write)(usb_handle *h, const void *data, int len); |
| 47 | int (*read)(usb_handle *h, void *data, int len); |
| 48 | void (*kick)(usb_handle *h); |
| 49 | |
| 50 | int control; |
| 51 | int bulk_out; /* "out" from the host's perspective => source for adbd */ |
| 52 | int bulk_in; /* "in" from the host's perspective => sink for adbd */ |
| 53 | }; |
| 54 | |
Badhri Jagan Sridharan | 9e3cce5 | 2014-10-27 18:32:35 -0700 | [diff] [blame] | 55 | struct func_desc { |
| 56 | struct usb_interface_descriptor intf; |
| 57 | struct usb_endpoint_descriptor_no_audio source; |
| 58 | struct usb_endpoint_descriptor_no_audio sink; |
| 59 | } __attribute__((packed)); |
| 60 | |
| 61 | struct desc_v1 { |
| 62 | struct usb_functionfs_descs_head_v1 { |
| 63 | __le32 magic; |
| 64 | __le32 length; |
| 65 | __le32 fs_count; |
| 66 | __le32 hs_count; |
| 67 | } __attribute__((packed)) header; |
| 68 | struct func_desc fs_descs, hs_descs; |
| 69 | } __attribute__((packed)); |
| 70 | |
| 71 | struct desc_v2 { |
Christopher Ferris | 3ed8ef0 | 2015-01-26 12:53:20 -0800 | [diff] [blame] | 72 | struct usb_functionfs_descs_head_v2 header; |
| 73 | // The rest of the structure depends on the flags in the header. |
| 74 | __le32 fs_count; |
| 75 | __le32 hs_count; |
Badhri Jagan Sridharan | 9e3cce5 | 2014-10-27 18:32:35 -0700 | [diff] [blame] | 76 | struct func_desc fs_descs, hs_descs; |
| 77 | } __attribute__((packed)); |
| 78 | |
| 79 | /*static const struct { |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 80 | struct usb_functionfs_descs_head header; |
| 81 | struct { |
| 82 | struct usb_interface_descriptor intf; |
| 83 | struct usb_endpoint_descriptor_no_audio source; |
| 84 | struct usb_endpoint_descriptor_no_audio sink; |
| 85 | } __attribute__((packed)) fs_descs, hs_descs; |
| 86 | } __attribute__((packed)) descriptors = { |
| 87 | .header = { |
| 88 | .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC), |
| 89 | .length = cpu_to_le32(sizeof(descriptors)), |
| 90 | .fs_count = 3, |
| 91 | .hs_count = 3, |
| 92 | }, |
Badhri Jagan Sridharan | 9e3cce5 | 2014-10-27 18:32:35 -0700 | [diff] [blame] | 93 | |
| 94 | */ |
| 95 | |
| 96 | struct func_desc fs_descriptors = { |
| 97 | .intf = { |
| 98 | .bLength = sizeof(fs_descriptors.intf), |
| 99 | .bDescriptorType = USB_DT_INTERFACE, |
| 100 | .bInterfaceNumber = 0, |
| 101 | .bNumEndpoints = 2, |
| 102 | .bInterfaceClass = ADB_CLASS, |
| 103 | .bInterfaceSubClass = ADB_SUBCLASS, |
| 104 | .bInterfaceProtocol = ADB_PROTOCOL, |
| 105 | .iInterface = 1, /* first string from the provided table */ |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 106 | }, |
Badhri Jagan Sridharan | 9e3cce5 | 2014-10-27 18:32:35 -0700 | [diff] [blame] | 107 | .source = { |
| 108 | .bLength = sizeof(fs_descriptors.source), |
| 109 | .bDescriptorType = USB_DT_ENDPOINT, |
| 110 | .bEndpointAddress = 1 | USB_DIR_OUT, |
| 111 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 112 | .wMaxPacketSize = MAX_PACKET_SIZE_FS, |
| 113 | }, |
| 114 | .sink = { |
| 115 | .bLength = sizeof(fs_descriptors.sink), |
| 116 | .bDescriptorType = USB_DT_ENDPOINT, |
| 117 | .bEndpointAddress = 2 | USB_DIR_IN, |
| 118 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 119 | .wMaxPacketSize = MAX_PACKET_SIZE_FS, |
| 120 | }, |
| 121 | }; |
| 122 | |
| 123 | struct func_desc hs_descriptors = { |
| 124 | .intf = { |
| 125 | .bLength = sizeof(hs_descriptors.intf), |
| 126 | .bDescriptorType = USB_DT_INTERFACE, |
| 127 | .bInterfaceNumber = 0, |
| 128 | .bNumEndpoints = 2, |
| 129 | .bInterfaceClass = ADB_CLASS, |
| 130 | .bInterfaceSubClass = ADB_SUBCLASS, |
| 131 | .bInterfaceProtocol = ADB_PROTOCOL, |
| 132 | .iInterface = 1, /* first string from the provided table */ |
| 133 | }, |
| 134 | .source = { |
| 135 | .bLength = sizeof(hs_descriptors.source), |
| 136 | .bDescriptorType = USB_DT_ENDPOINT, |
| 137 | .bEndpointAddress = 1 | USB_DIR_OUT, |
| 138 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 139 | .wMaxPacketSize = MAX_PACKET_SIZE_HS, |
| 140 | }, |
| 141 | .sink = { |
| 142 | .bLength = sizeof(hs_descriptors.sink), |
| 143 | .bDescriptorType = USB_DT_ENDPOINT, |
| 144 | .bEndpointAddress = 2 | USB_DIR_IN, |
| 145 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 146 | .wMaxPacketSize = MAX_PACKET_SIZE_HS, |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 147 | }, |
| 148 | }; |
| 149 | |
| 150 | #define STR_INTERFACE_ "ADB Interface" |
| 151 | |
| 152 | static const struct { |
| 153 | struct usb_functionfs_strings_head header; |
| 154 | struct { |
| 155 | __le16 code; |
| 156 | const char str1[sizeof(STR_INTERFACE_)]; |
| 157 | } __attribute__((packed)) lang0; |
| 158 | } __attribute__((packed)) strings = { |
| 159 | .header = { |
| 160 | .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC), |
| 161 | .length = cpu_to_le32(sizeof(strings)), |
| 162 | .str_count = cpu_to_le32(1), |
| 163 | .lang_count = cpu_to_le32(1), |
| 164 | }, |
| 165 | .lang0 = { |
| 166 | cpu_to_le16(0x0409), /* en-us */ |
| 167 | STR_INTERFACE_, |
| 168 | }, |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 169 | }; |
| 170 | |
| 171 | void usb_cleanup() |
| 172 | { |
| 173 | // nothing to do here |
| 174 | } |
| 175 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 176 | static void *usb_adb_open_thread(void *x) |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 177 | { |
| 178 | struct usb_handle *usb = (struct usb_handle *)x; |
| 179 | int fd; |
| 180 | |
| 181 | while (1) { |
| 182 | // wait until the USB device needs opening |
| 183 | adb_mutex_lock(&usb->lock); |
| 184 | while (usb->fd != -1) |
| 185 | adb_cond_wait(&usb->notify, &usb->lock); |
| 186 | adb_mutex_unlock(&usb->lock); |
| 187 | |
| 188 | D("[ usb_thread - opening device ]\n"); |
| 189 | do { |
| 190 | /* XXX use inotify? */ |
| 191 | fd = unix_open("/dev/android_adb", O_RDWR); |
| 192 | if (fd < 0) { |
| 193 | // to support older kernels |
| 194 | fd = unix_open("/dev/android", O_RDWR); |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 195 | fprintf(stderr, "usb_adb_open_thread: %d\n", fd ); |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 196 | } |
| 197 | if (fd < 0) { |
| 198 | adb_sleep_ms(1000); |
| 199 | } |
| 200 | } while (fd < 0); |
| 201 | D("[ opening device succeeded ]\n"); |
| 202 | |
| 203 | close_on_exec(fd); |
| 204 | usb->fd = fd; |
| 205 | |
| 206 | D("[ usb_thread - registering device ]\n"); |
| 207 | register_usb_transport(usb, 0, 1); |
| 208 | } |
| 209 | |
| 210 | // never gets here |
| 211 | return 0; |
| 212 | } |
| 213 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 214 | static int usb_adb_write(usb_handle *h, const void *data, int len) |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 215 | { |
| 216 | int n; |
| 217 | |
| 218 | D("about to write (fd=%d, len=%d)\n", h->fd, len); |
| 219 | n = adb_write(h->fd, data, len); |
| 220 | if(n != len) { |
| 221 | D("ERROR: fd = %d, n = %d, errno = %d (%s)\n", |
| 222 | h->fd, n, errno, strerror(errno)); |
| 223 | return -1; |
| 224 | } |
| 225 | D("[ done fd=%d ]\n", h->fd); |
| 226 | return 0; |
| 227 | } |
| 228 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 229 | static int usb_adb_read(usb_handle *h, void *data, int len) |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 230 | { |
| 231 | int n; |
| 232 | |
| 233 | D("about to read (fd=%d, len=%d)\n", h->fd, len); |
| 234 | n = adb_read(h->fd, data, len); |
| 235 | if(n != len) { |
| 236 | D("ERROR: fd = %d, n = %d, errno = %d (%s)\n", |
| 237 | h->fd, n, errno, strerror(errno)); |
| 238 | return -1; |
| 239 | } |
| 240 | D("[ done fd=%d ]\n", h->fd); |
| 241 | return 0; |
| 242 | } |
| 243 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 244 | static void usb_adb_kick(usb_handle *h) |
| 245 | { |
| 246 | D("usb_kick\n"); |
| 247 | adb_mutex_lock(&h->lock); |
| 248 | adb_close(h->fd); |
| 249 | h->fd = -1; |
| 250 | |
| 251 | // notify usb_adb_open_thread that we are disconnected |
| 252 | adb_cond_signal(&h->notify); |
| 253 | adb_mutex_unlock(&h->lock); |
| 254 | } |
| 255 | |
| 256 | static void usb_adb_init() |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 257 | { |
| 258 | usb_handle *h; |
| 259 | adb_thread_t tid; |
| 260 | int fd; |
| 261 | |
| 262 | h = calloc(1, sizeof(usb_handle)); |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 263 | |
| 264 | h->write = usb_adb_write; |
| 265 | h->read = usb_adb_read; |
| 266 | h->kick = usb_adb_kick; |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 267 | h->fd = -1; |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 268 | |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 269 | adb_cond_init(&h->notify, 0); |
| 270 | adb_mutex_init(&h->lock, 0); |
| 271 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 272 | fprintf(stderr, "Starting to open usb_init()\n"); |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 273 | // Open the file /dev/android_adb_enable to trigger |
| 274 | // the enabling of the adb USB function in the kernel. |
| 275 | // We never touch this file again - just leave it open |
| 276 | // indefinitely so the kernel will know when we are running |
| 277 | // and when we are not. |
| 278 | fd = unix_open("/dev/android_adb_enable", O_RDWR); |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 279 | fprintf(stderr, "unix_open to open usb_init(): %d\n", fd); |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 280 | if (fd < 0) { |
| 281 | D("failed to open /dev/android_adb_enable\n"); |
| 282 | } else { |
| 283 | close_on_exec(fd); |
| 284 | } |
| 285 | |
| 286 | D("[ usb_init - starting thread ]\n"); |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 287 | if(adb_thread_create(&tid, usb_adb_open_thread, h)){ |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 288 | fatal_errno("cannot create usb thread"); |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 289 | fprintf(stderr, "cannot create the usb thread()\n"); |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 290 | } |
| 291 | } |
| 292 | |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 293 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 294 | static void init_functionfs(struct usb_handle *h) |
| 295 | { |
| 296 | ssize_t ret; |
Badhri Jagan Sridharan | 9e3cce5 | 2014-10-27 18:32:35 -0700 | [diff] [blame] | 297 | struct desc_v1 v1_descriptor; |
| 298 | struct desc_v2 v2_descriptor; |
| 299 | |
| 300 | v2_descriptor.header.magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2); |
| 301 | v2_descriptor.header.length = cpu_to_le32(sizeof(v2_descriptor)); |
| 302 | v2_descriptor.header.flags = FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC; |
Christopher Ferris | 3ed8ef0 | 2015-01-26 12:53:20 -0800 | [diff] [blame] | 303 | v2_descriptor.fs_count = 3; |
| 304 | v2_descriptor.hs_count = 3; |
Badhri Jagan Sridharan | 9e3cce5 | 2014-10-27 18:32:35 -0700 | [diff] [blame] | 305 | v2_descriptor.fs_descs = fs_descriptors; |
| 306 | v2_descriptor.hs_descs = hs_descriptors; |
| 307 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 308 | |
| 309 | D("OPENING %s\n", USB_FFS_ADB_EP0); |
| 310 | h->control = adb_open(USB_FFS_ADB_EP0, O_RDWR); |
| 311 | if (h->control < 0) { |
| 312 | D("[ %s: cannot open control endpoint: errno=%d]\n", USB_FFS_ADB_EP0, errno); |
| 313 | goto err; |
| 314 | } |
| 315 | |
Badhri Jagan Sridharan | 9e3cce5 | 2014-10-27 18:32:35 -0700 | [diff] [blame] | 316 | ret = adb_write(h->control, &v2_descriptor, sizeof(v2_descriptor)); |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 317 | if (ret < 0) { |
Badhri Jagan Sridharan | 9e3cce5 | 2014-10-27 18:32:35 -0700 | [diff] [blame] | 318 | v1_descriptor.header.magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC); |
| 319 | v1_descriptor.header.length = cpu_to_le32(sizeof(v1_descriptor)); |
| 320 | v1_descriptor.header.fs_count = 3; |
| 321 | v1_descriptor.header.hs_count = 3; |
| 322 | v1_descriptor.fs_descs = fs_descriptors; |
| 323 | v1_descriptor.hs_descs = hs_descriptors; |
| 324 | D("[ %s: Switching to V1_descriptor format errno=%d ]\n", USB_FFS_ADB_EP0, errno); |
| 325 | ret = adb_write(h->control, &v1_descriptor, sizeof(v1_descriptor)); |
| 326 | if (ret < 0) { |
| 327 | D("[ %s: write descriptors failed: errno=%d ]\n", USB_FFS_ADB_EP0, errno); |
| 328 | goto err; |
| 329 | } |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | ret = adb_write(h->control, &strings, sizeof(strings)); |
| 333 | if (ret < 0) { |
| 334 | D("[ %s: writing strings failed: errno=%d]\n", USB_FFS_ADB_EP0, errno); |
| 335 | goto err; |
| 336 | } |
| 337 | |
| 338 | h->bulk_out = adb_open(USB_FFS_ADB_OUT, O_RDWR); |
| 339 | if (h->bulk_out < 0) { |
| 340 | D("[ %s: cannot open bulk-out ep: errno=%d ]\n", USB_FFS_ADB_OUT, errno); |
| 341 | goto err; |
| 342 | } |
| 343 | |
| 344 | h->bulk_in = adb_open(USB_FFS_ADB_IN, O_RDWR); |
| 345 | if (h->bulk_in < 0) { |
| 346 | D("[ %s: cannot open bulk-in ep: errno=%d ]\n", USB_FFS_ADB_IN, errno); |
| 347 | goto err; |
| 348 | } |
| 349 | |
| 350 | return; |
| 351 | |
| 352 | err: |
| 353 | if (h->bulk_in > 0) { |
| 354 | adb_close(h->bulk_in); |
| 355 | h->bulk_in = -1; |
| 356 | } |
| 357 | if (h->bulk_out > 0) { |
| 358 | adb_close(h->bulk_out); |
| 359 | h->bulk_out = -1; |
| 360 | } |
| 361 | if (h->control > 0) { |
| 362 | adb_close(h->control); |
| 363 | h->control = -1; |
| 364 | } |
| 365 | return; |
| 366 | } |
| 367 | |
| 368 | static void *usb_ffs_open_thread(void *x) |
| 369 | { |
| 370 | struct usb_handle *usb = (struct usb_handle *)x; |
| 371 | |
| 372 | while (1) { |
| 373 | // wait until the USB device needs opening |
| 374 | adb_mutex_lock(&usb->lock); |
| 375 | while (usb->control != -1) |
| 376 | adb_cond_wait(&usb->notify, &usb->lock); |
| 377 | adb_mutex_unlock(&usb->lock); |
| 378 | |
| 379 | while (1) { |
| 380 | init_functionfs(usb); |
| 381 | |
| 382 | if (usb->control >= 0) |
| 383 | break; |
| 384 | |
| 385 | adb_sleep_ms(1000); |
| 386 | } |
| 387 | |
| 388 | D("[ usb_thread - registering device ]\n"); |
| 389 | register_usb_transport(usb, 0, 1); |
| 390 | } |
| 391 | |
| 392 | // never gets here |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | static int bulk_write(int bulk_in, const char *buf, size_t length) |
| 397 | { |
| 398 | size_t count = 0; |
| 399 | int ret; |
| 400 | |
| 401 | do { |
| 402 | ret = adb_write(bulk_in, buf + count, length - count); |
| 403 | if (ret < 0) { |
| 404 | if (errno != EINTR) |
| 405 | return ret; |
| 406 | } else { |
| 407 | count += ret; |
| 408 | } |
| 409 | } while (count < length); |
| 410 | |
| 411 | D("[ bulk_write done fd=%d ]\n", bulk_in); |
| 412 | return count; |
| 413 | } |
| 414 | |
| 415 | static int usb_ffs_write(usb_handle *h, const void *data, int len) |
| 416 | { |
| 417 | int n; |
| 418 | |
| 419 | D("about to write (fd=%d, len=%d)\n", h->bulk_in, len); |
| 420 | n = bulk_write(h->bulk_in, data, len); |
| 421 | if (n != len) { |
| 422 | D("ERROR: fd = %d, n = %d, errno = %d (%s)\n", |
| 423 | h->bulk_in, n, errno, strerror(errno)); |
| 424 | return -1; |
| 425 | } |
| 426 | D("[ done fd=%d ]\n", h->bulk_in); |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | static int bulk_read(int bulk_out, char *buf, size_t length) |
| 431 | { |
| 432 | size_t count = 0; |
| 433 | int ret; |
| 434 | |
| 435 | do { |
| 436 | ret = adb_read(bulk_out, buf + count, length - count); |
| 437 | if (ret < 0) { |
| 438 | if (errno != EINTR) { |
Mark Salyzyn | f3bb31c | 2014-03-14 09:39:48 -0700 | [diff] [blame] | 439 | D("[ bulk_read failed fd=%d length=%zu count=%zu ]\n", |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 440 | bulk_out, length, count); |
| 441 | return ret; |
| 442 | } |
| 443 | } else { |
| 444 | count += ret; |
| 445 | } |
| 446 | } while (count < length); |
| 447 | |
| 448 | return count; |
| 449 | } |
| 450 | |
| 451 | static int usb_ffs_read(usb_handle *h, void *data, int len) |
| 452 | { |
| 453 | int n; |
| 454 | |
| 455 | D("about to read (fd=%d, len=%d)\n", h->bulk_out, len); |
| 456 | n = bulk_read(h->bulk_out, data, len); |
| 457 | if (n != len) { |
| 458 | D("ERROR: fd = %d, n = %d, errno = %d (%s)\n", |
| 459 | h->bulk_out, n, errno, strerror(errno)); |
| 460 | return -1; |
| 461 | } |
| 462 | D("[ done fd=%d ]\n", h->bulk_out); |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | static void usb_ffs_kick(usb_handle *h) |
| 467 | { |
| 468 | int err; |
| 469 | |
| 470 | err = ioctl(h->bulk_in, FUNCTIONFS_CLEAR_HALT); |
| 471 | if (err < 0) |
| 472 | D("[ kick: source (fd=%d) clear halt failed (%d) ]", h->bulk_in, errno); |
| 473 | |
| 474 | err = ioctl(h->bulk_out, FUNCTIONFS_CLEAR_HALT); |
| 475 | if (err < 0) |
| 476 | D("[ kick: sink (fd=%d) clear halt failed (%d) ]", h->bulk_out, errno); |
| 477 | |
| 478 | adb_mutex_lock(&h->lock); |
| 479 | adb_close(h->control); |
| 480 | adb_close(h->bulk_out); |
| 481 | adb_close(h->bulk_in); |
| 482 | h->control = h->bulk_out = h->bulk_in = -1; |
| 483 | |
| 484 | // notify usb_ffs_open_thread that we are disconnected |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 485 | adb_cond_signal(&h->notify); |
| 486 | adb_mutex_unlock(&h->lock); |
| 487 | } |
| 488 | |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 489 | static void usb_ffs_init() |
| 490 | { |
| 491 | usb_handle *h; |
| 492 | adb_thread_t tid; |
| 493 | |
| 494 | D("[ usb_init - using FunctionFS ]\n"); |
| 495 | |
| 496 | h = calloc(1, sizeof(usb_handle)); |
| 497 | |
| 498 | h->write = usb_ffs_write; |
| 499 | h->read = usb_ffs_read; |
| 500 | h->kick = usb_ffs_kick; |
| 501 | |
| 502 | h->control = -1; |
| 503 | h->bulk_out = -1; |
| 504 | h->bulk_out = -1; |
| 505 | |
| 506 | adb_cond_init(&h->notify, 0); |
| 507 | adb_mutex_init(&h->lock, 0); |
| 508 | |
| 509 | D("[ usb_init - starting thread ]\n"); |
| 510 | if (adb_thread_create(&tid, usb_ffs_open_thread, h)){ |
| 511 | fatal_errno("[ cannot create usb thread ]\n"); |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | void usb_init() |
| 516 | { |
| 517 | if (access(USB_FFS_ADB_EP0, F_OK) == 0) |
| 518 | usb_ffs_init(); |
| 519 | else |
| 520 | usb_adb_init(); |
| 521 | } |
| 522 | |
| 523 | int usb_write(usb_handle *h, const void *data, int len) |
| 524 | { |
| 525 | return h->write(h, data, len); |
| 526 | } |
| 527 | |
| 528 | int usb_read(usb_handle *h, void *data, int len) |
| 529 | { |
| 530 | return h->read(h, data, len); |
| 531 | } |
Doug Zongker | 9270a20 | 2012-01-09 15:16:13 -0800 | [diff] [blame] | 532 | int usb_close(usb_handle *h) |
| 533 | { |
| 534 | // nothing to do here |
| 535 | return 0; |
| 536 | } |
Da Zhou | 65ad928 | 2014-01-17 01:04:07 -0800 | [diff] [blame] | 537 | |
| 538 | void usb_kick(usb_handle *h) |
| 539 | { |
| 540 | h->kick(h); |
| 541 | } |