Mike Lockwood | 6b524d9 | 2014-08-04 14:48:45 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 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 <unistd.h> |
| 18 | #include <stdio.h> |
| 19 | #include <string.h> |
| 20 | #include <stdlib.h> |
| 21 | |
| 22 | #include <sys/types.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/ioctl.h> |
| 25 | #include <fcntl.h> |
| 26 | #include <errno.h> |
| 27 | #include <pthread.h> |
| 28 | #include <time.h> |
| 29 | |
| 30 | #include <sys/inotify.h> |
| 31 | #include <linux/hidraw.h> |
| 32 | #include <usbhost/usbhost.h> |
| 33 | |
| 34 | #include "f_accessory.h" |
| 35 | #include "accessory.h" |
| 36 | |
| 37 | static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; |
| 38 | |
| 39 | static int next_id = 1; |
| 40 | |
| 41 | static void milli_sleep(int millis) { |
| 42 | struct timespec tm; |
| 43 | |
| 44 | tm.tv_sec = 0; |
| 45 | tm.tv_nsec = millis * 1000000; |
| 46 | nanosleep(&tm, NULL); |
| 47 | } |
| 48 | |
| 49 | static void* hid_thread(void* arg) { |
| 50 | int fd = (int)arg; |
| 51 | char buffer[4096]; |
| 52 | int id, ret, offset; |
| 53 | struct usb_device *device; |
| 54 | struct usb_device_descriptor *device_desc; |
| 55 | int max_packet; |
| 56 | struct hidraw_report_descriptor desc; |
| 57 | int desc_length; |
| 58 | |
| 59 | fprintf(stderr, "hid_thread start fd: %d\n", fd); |
| 60 | |
| 61 | if (ioctl(fd, HIDIOCGRDESCSIZE, &desc_length)) { |
| 62 | fprintf(stderr, "HIDIOCGRDESCSIZE failed\n"); |
| 63 | close(fd); |
| 64 | goto err; |
| 65 | } |
| 66 | |
| 67 | desc.size = HID_MAX_DESCRIPTOR_SIZE - 1; |
| 68 | if (ioctl(fd, HIDIOCGRDESC, &desc)) { |
| 69 | fprintf(stderr, "HIDIOCGRDESC failed\n"); |
| 70 | close(fd); |
| 71 | goto err; |
| 72 | } |
| 73 | |
| 74 | wait_for_device: |
| 75 | fprintf(stderr, "waiting for device fd: %d\n", fd); |
| 76 | device = usb_wait_for_device(); |
| 77 | max_packet = usb_device_get_device_descriptor(device)->bMaxPacketSize0; |
| 78 | // FIXME |
| 79 | max_packet--; |
| 80 | |
| 81 | // FIXME |
| 82 | milli_sleep(500); |
| 83 | |
| 84 | pthread_mutex_lock(&mutex); |
| 85 | id = next_id++; |
| 86 | |
| 87 | ret = usb_device_control_transfer(device, USB_DIR_OUT | USB_TYPE_VENDOR, |
| 88 | ACCESSORY_REGISTER_HID, id, desc_length, NULL, 0, 1000); |
| 89 | fprintf(stderr, "ACCESSORY_REGISTER_HID returned %d\n", ret); |
| 90 | |
| 91 | // FIXME |
| 92 | milli_sleep(500); |
| 93 | |
| 94 | for (offset = 0; offset < desc_length; ) { |
| 95 | int count = desc_length - offset; |
| 96 | if (count > max_packet) count = max_packet; |
| 97 | |
| 98 | fprintf(stderr, "sending ACCESSORY_SET_HID_REPORT_DESC offset: %d count: %d desc_length: %d\n", |
| 99 | offset, count, desc_length); |
| 100 | ret = usb_device_control_transfer(device, USB_DIR_OUT | USB_TYPE_VENDOR, |
| 101 | ACCESSORY_SET_HID_REPORT_DESC, id, offset, &desc.value[offset], count, 1000); |
| 102 | fprintf(stderr, "ACCESSORY_SET_HID_REPORT_DESC returned %d errno %d\n", ret, errno); |
| 103 | offset += count; |
| 104 | } |
| 105 | |
| 106 | pthread_mutex_unlock(&mutex); |
| 107 | |
| 108 | while (1) { |
| 109 | ret = read(fd, buffer, sizeof(buffer)); |
| 110 | if (ret < 0) { |
| 111 | fprintf(stderr, "read failed, errno: %d, fd: %d\n", errno, fd); |
| 112 | break; |
| 113 | } |
| 114 | |
| 115 | ret = usb_device_control_transfer(device, USB_DIR_OUT | USB_TYPE_VENDOR, |
| 116 | ACCESSORY_SEND_HID_EVENT, id, 0, buffer, ret, 1000); |
| 117 | if (ret < 0 && errno != EPIPE) { |
| 118 | fprintf(stderr, "ACCESSORY_SEND_HID_EVENT returned %d errno: %d\n", ret, errno); |
| 119 | goto wait_for_device; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | fprintf(stderr, "ACCESSORY_UNREGISTER_HID\n"); |
| 124 | ret = usb_device_control_transfer(device, USB_DIR_OUT | USB_TYPE_VENDOR, |
| 125 | ACCESSORY_UNREGISTER_HID, id, 0, NULL, 0, 1000); |
| 126 | |
| 127 | fprintf(stderr, "hid thread exiting\n"); |
| 128 | err: |
| 129 | return NULL; |
| 130 | } |
| 131 | |
| 132 | static void open_hid(const char* name) |
| 133 | { |
| 134 | char path[100]; |
| 135 | |
| 136 | snprintf(path, sizeof(path), "/dev/%s", name); |
| 137 | int fd = open(path, O_RDWR); |
| 138 | if (fd < 0) return; |
| 139 | |
| 140 | fprintf(stderr, "opened /dev/%s\n", name); |
| 141 | pthread_t th; |
| 142 | pthread_create(&th, NULL, hid_thread, (void *)fd); |
| 143 | } |
| 144 | |
| 145 | static void* inotify_thread(void* arg) |
| 146 | { |
| 147 | open_hid("hidraw0"); |
| 148 | open_hid("hidraw1"); |
| 149 | open_hid("hidraw2"); |
| 150 | open_hid("hidraw3"); |
| 151 | open_hid("hidraw4"); |
| 152 | open_hid("hidraw5"); |
| 153 | open_hid("hidraw6"); |
| 154 | open_hid("hidraw7"); |
| 155 | open_hid("hidraw8"); |
| 156 | open_hid("hidraw9"); |
| 157 | |
| 158 | int inotify_fd = inotify_init(); |
| 159 | inotify_add_watch(inotify_fd, "/dev", IN_DELETE | IN_CREATE); |
| 160 | |
| 161 | while (1) { |
| 162 | char event_buf[512]; |
| 163 | struct inotify_event *event; |
| 164 | int event_pos = 0; |
| 165 | int event_size; |
| 166 | |
| 167 | int count = read(inotify_fd, event_buf, sizeof(event_buf)); |
| 168 | if (count < (int)sizeof(*event)) { |
| 169 | if(errno == EINTR) |
| 170 | continue; |
| 171 | fprintf(stderr, "could not get event, %s\n", strerror(errno)); |
| 172 | break; |
| 173 | } |
| 174 | while (count >= (int)sizeof(*event)) { |
| 175 | event = (struct inotify_event *)(event_buf + event_pos); |
| 176 | //fprintf(stderr, "%d: %08x \"%s\"\n", event->wd, event->mask, |
| 177 | // event->len ? event->name : ""); |
| 178 | if (event->len) { |
| 179 | if(event->mask & IN_CREATE) { |
| 180 | fprintf(stderr, "created %s\n", event->name); |
| 181 | // FIXME |
| 182 | milli_sleep(50); |
| 183 | open_hid(event->name); |
| 184 | } else { |
| 185 | fprintf(stderr, "lost %s\n", event->name); |
| 186 | } |
| 187 | } |
| 188 | event_size = sizeof(*event) + event->len; |
| 189 | count -= event_size; |
| 190 | event_pos += event_size; |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | close(inotify_fd); |
| 195 | return NULL; |
| 196 | } |
| 197 | |
| 198 | void init_hid() |
| 199 | { |
| 200 | pthread_t th; |
| 201 | pthread_create(&th, NULL, inotify_thread, NULL); |
| 202 | } |