Colin Cross | a3d386e | 2013-02-06 21:03:34 -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 <endian.h> |
| 18 | #include <fcntl.h> |
| 19 | #include <pthread.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | #include <sys/ioctl.h> |
| 26 | #include <sys/types.h> |
| 27 | |
| 28 | #include <linux/usb/ch9.h> |
| 29 | #include <linux/usb/functionfs.h> |
| 30 | |
| 31 | #include "debug.h" |
| 32 | #include "transport.h" |
Szymon Starzycki | 2a656c3 | 2013-09-05 14:26:28 -0700 | [diff] [blame] | 33 | #include "utils.h" |
Colin Cross | a3d386e | 2013-02-06 21:03:34 -0800 | [diff] [blame] | 34 | |
| 35 | #define TRACE_TAG TRACE_USB |
| 36 | |
| 37 | #define MAX_PACKET_SIZE_FS 64 |
| 38 | #define MAX_PACKET_SIZE_HS 512 |
| 39 | |
| 40 | #define cpu_to_le16(x) htole16(x) |
| 41 | #define cpu_to_le32(x) htole32(x) |
| 42 | |
| 43 | #define FASTBOOT_CLASS 0xff |
| 44 | #define FASTBOOT_SUBCLASS 0x42 |
| 45 | #define FASTBOOT_PROTOCOL 0x3 |
| 46 | |
| 47 | #define USB_FFS_FASTBOOT_PATH "/dev/usb-ffs/adb/" |
| 48 | #define USB_FFS_FASTBOOT_EP(x) USB_FFS_FASTBOOT_PATH#x |
| 49 | |
| 50 | #define USB_FFS_FASTBOOT_EP0 USB_FFS_FASTBOOT_EP(ep0) |
| 51 | #define USB_FFS_FASTBOOT_OUT USB_FFS_FASTBOOT_EP(ep1) |
| 52 | #define USB_FFS_FASTBOOT_IN USB_FFS_FASTBOOT_EP(ep2) |
| 53 | |
Colin Cross | a3d386e | 2013-02-06 21:03:34 -0800 | [diff] [blame] | 54 | #define container_of(ptr, type, member) \ |
| 55 | ((type*)((char*)(ptr) - offsetof(type, member))) |
| 56 | |
| 57 | struct usb_transport { |
| 58 | struct transport transport; |
| 59 | |
| 60 | pthread_cond_t notify; |
| 61 | pthread_mutex_t lock; |
| 62 | |
| 63 | int control; |
| 64 | int bulk_out; /* "out" from the host's perspective => source for fastbootd */ |
| 65 | int bulk_in; /* "in" from the host's perspective => sink for fastbootd */ |
| 66 | }; |
| 67 | |
| 68 | struct usb_handle { |
| 69 | struct transport_handle handle; |
| 70 | }; |
| 71 | |
| 72 | static const struct { |
| 73 | struct usb_functionfs_descs_head header; |
| 74 | struct { |
| 75 | struct usb_interface_descriptor intf; |
| 76 | struct usb_endpoint_descriptor_no_audio source; |
| 77 | struct usb_endpoint_descriptor_no_audio sink; |
| 78 | } __attribute__((packed)) fs_descs, hs_descs; |
| 79 | } __attribute__((packed)) descriptors = { |
| 80 | .header = { |
| 81 | .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC), |
| 82 | .length = cpu_to_le32(sizeof(descriptors)), |
| 83 | .fs_count = 3, |
| 84 | .hs_count = 3, |
| 85 | }, |
| 86 | .fs_descs = { |
| 87 | .intf = { |
| 88 | .bLength = sizeof(descriptors.fs_descs.intf), |
| 89 | .bDescriptorType = USB_DT_INTERFACE, |
| 90 | .bInterfaceNumber = 0, |
| 91 | .bNumEndpoints = 2, |
| 92 | .bInterfaceClass = FASTBOOT_CLASS, |
| 93 | .bInterfaceSubClass = FASTBOOT_SUBCLASS, |
| 94 | .bInterfaceProtocol = FASTBOOT_PROTOCOL, |
| 95 | .iInterface = 1, /* first string from the provided table */ |
| 96 | }, |
| 97 | .source = { |
| 98 | .bLength = sizeof(descriptors.fs_descs.source), |
| 99 | .bDescriptorType = USB_DT_ENDPOINT, |
| 100 | .bEndpointAddress = 1 | USB_DIR_OUT, |
| 101 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 102 | .wMaxPacketSize = MAX_PACKET_SIZE_FS, |
| 103 | }, |
| 104 | .sink = { |
| 105 | .bLength = sizeof(descriptors.fs_descs.sink), |
| 106 | .bDescriptorType = USB_DT_ENDPOINT, |
| 107 | .bEndpointAddress = 2 | USB_DIR_IN, |
| 108 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 109 | .wMaxPacketSize = MAX_PACKET_SIZE_FS, |
| 110 | }, |
| 111 | }, |
| 112 | .hs_descs = { |
| 113 | .intf = { |
| 114 | .bLength = sizeof(descriptors.hs_descs.intf), |
| 115 | .bDescriptorType = USB_DT_INTERFACE, |
| 116 | .bInterfaceNumber = 0, |
| 117 | .bNumEndpoints = 2, |
| 118 | .bInterfaceClass = FASTBOOT_CLASS, |
| 119 | .bInterfaceSubClass = FASTBOOT_SUBCLASS, |
| 120 | .bInterfaceProtocol = FASTBOOT_PROTOCOL, |
| 121 | .iInterface = 1, /* first string from the provided table */ |
| 122 | }, |
| 123 | .source = { |
| 124 | .bLength = sizeof(descriptors.hs_descs.source), |
| 125 | .bDescriptorType = USB_DT_ENDPOINT, |
| 126 | .bEndpointAddress = 1 | USB_DIR_OUT, |
| 127 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 128 | .wMaxPacketSize = MAX_PACKET_SIZE_HS, |
| 129 | }, |
| 130 | .sink = { |
| 131 | .bLength = sizeof(descriptors.hs_descs.sink), |
| 132 | .bDescriptorType = USB_DT_ENDPOINT, |
| 133 | .bEndpointAddress = 2 | USB_DIR_IN, |
| 134 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 135 | .wMaxPacketSize = MAX_PACKET_SIZE_HS, |
| 136 | }, |
| 137 | }, |
| 138 | }; |
| 139 | |
| 140 | #define STR_INTERFACE_ "Fastboot Interface" |
| 141 | |
| 142 | static const struct { |
| 143 | struct usb_functionfs_strings_head header; |
| 144 | struct { |
| 145 | __le16 code; |
| 146 | const char str1[sizeof(STR_INTERFACE_)]; |
| 147 | } __attribute__((packed)) lang0; |
| 148 | } __attribute__((packed)) strings = { |
| 149 | .header = { |
| 150 | .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC), |
| 151 | .length = cpu_to_le32(sizeof(strings)), |
| 152 | .str_count = cpu_to_le32(1), |
| 153 | .lang_count = cpu_to_le32(1), |
| 154 | }, |
| 155 | .lang0 = { |
| 156 | cpu_to_le16(0x0409), /* en-us */ |
| 157 | STR_INTERFACE_, |
| 158 | }, |
| 159 | }; |
| 160 | |
| 161 | static int init_functionfs(struct usb_transport *usb_transport) |
| 162 | { |
| 163 | ssize_t ret; |
| 164 | |
| 165 | D(VERBOSE, "OPENING %s", USB_FFS_FASTBOOT_EP0); |
| 166 | usb_transport->control = open(USB_FFS_FASTBOOT_EP0, O_RDWR); |
| 167 | if (usb_transport->control < 0) { |
| 168 | D(ERR, "[ %s: cannot open control endpoint: errno=%d]", USB_FFS_FASTBOOT_EP0, errno); |
| 169 | goto err; |
| 170 | } |
| 171 | |
| 172 | ret = write(usb_transport->control, &descriptors, sizeof(descriptors)); |
| 173 | if (ret < 0) { |
| 174 | D(ERR, "[ %s: write descriptors failed: errno=%d ]", USB_FFS_FASTBOOT_EP0, errno); |
| 175 | goto err; |
| 176 | } |
| 177 | |
| 178 | ret = write(usb_transport->control, &strings, sizeof(strings)); |
| 179 | if (ret < 0) { |
| 180 | D(ERR, "[ %s: writing strings failed: errno=%d]", USB_FFS_FASTBOOT_EP0, errno); |
| 181 | goto err; |
| 182 | } |
| 183 | |
| 184 | usb_transport->bulk_out = open(USB_FFS_FASTBOOT_OUT, O_RDWR); |
| 185 | if (usb_transport->bulk_out < 0) { |
| 186 | D(ERR, "[ %s: cannot open bulk-out ep: errno=%d ]", USB_FFS_FASTBOOT_OUT, errno); |
| 187 | goto err; |
| 188 | } |
| 189 | |
| 190 | usb_transport->bulk_in = open(USB_FFS_FASTBOOT_IN, O_RDWR); |
| 191 | if (usb_transport->bulk_in < 0) { |
| 192 | D(ERR, "[ %s: cannot open bulk-in ep: errno=%d ]", USB_FFS_FASTBOOT_IN, errno); |
| 193 | goto err; |
| 194 | } |
| 195 | |
| 196 | return 0; |
| 197 | |
| 198 | err: |
| 199 | if (usb_transport->bulk_in > 0) { |
| 200 | close(usb_transport->bulk_in); |
| 201 | usb_transport->bulk_in = -1; |
| 202 | } |
| 203 | if (usb_transport->bulk_out > 0) { |
| 204 | close(usb_transport->bulk_out); |
| 205 | usb_transport->bulk_out = -1; |
| 206 | } |
| 207 | if (usb_transport->control > 0) { |
| 208 | close(usb_transport->control); |
| 209 | usb_transport->control = -1; |
| 210 | } |
| 211 | return -1; |
| 212 | } |
| 213 | |
Colin Cross | a3d386e | 2013-02-06 21:03:34 -0800 | [diff] [blame] | 214 | static ssize_t usb_write(struct transport_handle *thandle, const void *data, size_t len) |
| 215 | { |
| 216 | ssize_t ret; |
| 217 | struct transport *t = thandle->transport; |
| 218 | struct usb_transport *usb_transport = container_of(t, struct usb_transport, transport); |
| 219 | |
Elliott Hughes | ccecf14 | 2014-01-16 10:53:11 -0800 | [diff] [blame] | 220 | D(DEBUG, "about to write (fd=%d, len=%zu)", usb_transport->bulk_in, len); |
Colin Cross | a3d386e | 2013-02-06 21:03:34 -0800 | [diff] [blame] | 221 | ret = bulk_write(usb_transport->bulk_in, data, len); |
| 222 | if (ret < 0) { |
| 223 | D(ERR, "ERROR: fd = %d, ret = %zd", usb_transport->bulk_in, ret); |
| 224 | return -1; |
| 225 | } |
| 226 | D(DEBUG, "[ usb_write done fd=%d ]", usb_transport->bulk_in); |
| 227 | return ret; |
| 228 | } |
| 229 | |
Colin Cross | a3d386e | 2013-02-06 21:03:34 -0800 | [diff] [blame] | 230 | ssize_t usb_read(struct transport_handle *thandle, void *data, size_t len) |
| 231 | { |
| 232 | ssize_t ret; |
| 233 | struct transport *t = thandle->transport; |
| 234 | struct usb_transport *usb_transport = container_of(t, struct usb_transport, transport); |
| 235 | |
Elliott Hughes | ccecf14 | 2014-01-16 10:53:11 -0800 | [diff] [blame] | 236 | D(DEBUG, "about to read (fd=%d, len=%zu)", usb_transport->bulk_out, len); |
Colin Cross | a3d386e | 2013-02-06 21:03:34 -0800 | [diff] [blame] | 237 | ret = bulk_read(usb_transport->bulk_out, data, len); |
| 238 | if (ret < 0) { |
| 239 | D(ERR, "ERROR: fd = %d, ret = %zd", usb_transport->bulk_out, ret); |
| 240 | return -1; |
| 241 | } |
| 242 | D(DEBUG, "[ usb_read done fd=%d ret=%zd]", usb_transport->bulk_out, ret); |
| 243 | return ret; |
| 244 | } |
| 245 | |
| 246 | void usb_close(struct transport_handle *thandle) |
| 247 | { |
| 248 | int err; |
| 249 | struct transport *t = thandle->transport; |
| 250 | struct usb_transport *usb_transport = container_of(t, struct usb_transport, transport); |
| 251 | |
| 252 | err = ioctl(usb_transport->bulk_in, FUNCTIONFS_CLEAR_HALT); |
| 253 | if (err < 0) |
| 254 | D(WARN, "[ kick: source (fd=%d) clear halt failed (%d) ]", usb_transport->bulk_in, errno); |
| 255 | |
| 256 | err = ioctl(usb_transport->bulk_out, FUNCTIONFS_CLEAR_HALT); |
| 257 | if (err < 0) |
| 258 | D(WARN, "[ kick: sink (fd=%d) clear halt failed (%d) ]", usb_transport->bulk_out, errno); |
| 259 | |
| 260 | pthread_mutex_lock(&usb_transport->lock); |
| 261 | close(usb_transport->control); |
| 262 | close(usb_transport->bulk_out); |
| 263 | close(usb_transport->bulk_in); |
| 264 | usb_transport->control = usb_transport->bulk_out = usb_transport->bulk_in = -1; |
| 265 | |
| 266 | pthread_cond_signal(&usb_transport->notify); |
| 267 | pthread_mutex_unlock(&usb_transport->lock); |
| 268 | } |
| 269 | |
| 270 | struct transport_handle *usb_connect(struct transport *transport) |
| 271 | { |
| 272 | int ret; |
| 273 | struct usb_handle *usb_handle = calloc(sizeof(struct usb_handle), 1); |
| 274 | struct usb_transport *usb_transport = container_of(transport, struct usb_transport, transport); |
| 275 | |
| 276 | pthread_mutex_lock(&usb_transport->lock); |
| 277 | while (usb_transport->control != -1) |
| 278 | pthread_cond_wait(&usb_transport->notify, &usb_transport->lock); |
| 279 | pthread_mutex_unlock(&usb_transport->lock); |
| 280 | |
| 281 | ret = init_functionfs(usb_transport); |
| 282 | if (ret < 0) { |
| 283 | D(ERR, "usb connect: failed to initialize usb transport"); |
| 284 | return NULL; |
| 285 | } |
| 286 | |
| 287 | D(DEBUG, "[ usb_thread - registering device ]"); |
| 288 | return &usb_handle->handle; |
| 289 | } |
| 290 | |
| 291 | void usb_init() |
| 292 | { |
| 293 | struct usb_transport *usb_transport = calloc(1, sizeof(struct usb_transport)); |
| 294 | |
| 295 | usb_transport->transport.connect = usb_connect; |
| 296 | usb_transport->transport.close = usb_close; |
| 297 | usb_transport->transport.read = usb_read; |
| 298 | usb_transport->transport.write = usb_write; |
| 299 | usb_transport->control = -1; |
| 300 | usb_transport->bulk_out = -1; |
| 301 | usb_transport->bulk_out = -1; |
| 302 | |
| 303 | pthread_cond_init(&usb_transport->notify, NULL); |
| 304 | pthread_mutex_init(&usb_transport->lock, NULL); |
| 305 | |
| 306 | transport_register(&usb_transport->transport); |
| 307 | } |
| 308 | |