usbhost.c revision e533c5f1005e8913f577d2aeac5a26f88f55a249
130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood/* 230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * Copyright (C) 2010 The Android Open Source Project 330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * 430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * Licensed under the Apache License, Version 2.0 (the "License"); 530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * you may not use this file except in compliance with the License. 630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * You may obtain a copy of the License at 730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * 830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * http://www.apache.org/licenses/LICENSE-2.0 930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * 1030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * Unless required by applicable law or agreed to in writing, software 1130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * distributed under the License is distributed on an "AS IS" BASIS, 1230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * See the License for the specific language governing permissions and 1430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood * limitations under the License. 1530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood */ 1630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 17e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood// #define DEBUG 1 18e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#if DEBUG 19e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood 20e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#ifdef USE_LIBLOG 21e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#define LOG_TAG "usbhost" 22e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#include "utils/Log.h" 23e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#define D LOGD 24e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#else 25e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#define D printf 26e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#endif 27e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood 28e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#else 29e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#define D(...) 30e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood#endif 31e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood 3230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <stdio.h> 3330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <stdlib.h> 3430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <unistd.h> 3530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <string.h> 3630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 3730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <sys/ioctl.h> 3830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <sys/types.h> 3930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <sys/time.h> 4030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <sys/inotify.h> 4130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <dirent.h> 4230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <fcntl.h> 4330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <errno.h> 4430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <ctype.h> 4530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <pthread.h> 4630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 4730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <linux/usbdevice_fs.h> 4830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <asm/byteorder.h> 4930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 5030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include "usbhost/usbhost.h" 5130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 5230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#define USB_FS_DIR "/dev/bus/usb" 53203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood#define USB_FS_ID_SCANNER "/dev/bus/usb/%d/%d" 547d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood#define USB_FS_ID_FORMAT "/dev/bus/usb/%03d/%03d" 5530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 5630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 576ac3aa157493ef24bc837b679dd8292fad8961e0Mike Lockwoodstruct usb_host_context { 587a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood int fd; 596ac3aa157493ef24bc837b679dd8292fad8961e0Mike Lockwood}; 606ac3aa157493ef24bc837b679dd8292fad8961e0Mike Lockwood 6130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstruct usb_device { 6230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood char dev_name[64]; 6330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood unsigned char desc[256]; 6430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int desc_length; 6530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int fd; 6630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int writeable; 6730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood}; 6830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 6930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstatic inline int badname(const char *name) 7030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 7130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood while(*name) { 7230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(!isdigit(*name++)) return 1; 7330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 7430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return 0; 7530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 7630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 777a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood/* returns true if one of the callbacks indicates we are done */ 787a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodstatic int find_existing_devices(usb_device_added_cb added_cb, 797a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood usb_device_removed_cb removed_cb, 807a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood void *client_data) 8130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 8230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood char busname[32], devname[32]; 8330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood DIR *busdir , *devdir ; 8430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct dirent *de; 857a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood int done = 0; 8630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 8730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood busdir = opendir(USB_FS_DIR); 887a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood if(busdir == 0) return 1; 8930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 907a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood while ((de = readdir(busdir)) != 0 && !done) { 9130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(badname(de->d_name)) continue; 9230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 9330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(busname, sizeof busname, "%s/%s", USB_FS_DIR, de->d_name); 9430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood devdir = opendir(busname); 9530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(devdir == 0) continue; 9630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 977a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood while ((de = readdir(devdir)) && !done) { 9830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(badname(de->d_name)) continue; 9930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 10030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(devname, sizeof devname, "%s/%s", busname, de->d_name); 1017a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood done = added_cb(devname, client_data); 10230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } // end of devdir while 10330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood closedir(devdir); 10430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } //end of busdir while 10530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood closedir(busdir); 1067a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood 1077a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return done; 1087a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood} 1097a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood 1107a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodstruct usb_host_context *usb_host_init() 1117a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood{ 1127a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood struct usb_host_context *context = calloc(1, sizeof(struct usb_host_context)); 1137a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood if (!context) { 1147a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood fprintf(stderr, "out of memory in usb_host_context\n"); 1157a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return NULL; 1167a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood } 1177a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood context->fd = inotify_init(); 1187a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood if (context->fd < 0) { 1197a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood fprintf(stderr, "inotify_init failed\n"); 1207a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood free(context); 1217a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return NULL; 1227a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood } 1237a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return context; 1247a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood} 1257a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood 1267a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodvoid usb_host_cleanup(struct usb_host_context *context) 1277a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood{ 1287a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood close(context->fd); 1297a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood free(context); 13030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 13130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 1327a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodvoid usb_host_run(struct usb_host_context *context, 1337a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood usb_device_added_cb added_cb, 1347a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood usb_device_removed_cb removed_cb, 135a805519ceedc53afa5453a6d8a7d80038d885d9fMike Lockwood usb_discovery_done_cb discovery_done_cb, 1367a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood void *client_data) 13730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 13830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct inotify_event* event; 13930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood char event_buf[512]; 14030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood char path[100]; 1417a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood int i, ret, done = 0; 14230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int wd, wds[10]; 14330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int wd_count = sizeof(wds) / sizeof(wds[0]); 14430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 14530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("Created device discovery thread\n"); 14630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 14730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* watch for files added and deleted within USB_FS_DIR */ 14830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood memset(wds, 0, sizeof(wds)); 14930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* watch the root for new subdirectories */ 1507a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood wds[0] = inotify_add_watch(context->fd, USB_FS_DIR, IN_CREATE | IN_DELETE); 15130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (wds[0] < 0) { 15230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood fprintf(stderr, "inotify_add_watch failed\n"); 153e8849d190a3097274dcb64416e564538a1017054Mike Lockwood if (discovery_done_cb) 154e8849d190a3097274dcb64416e564538a1017054Mike Lockwood discovery_done_cb(client_data); 1557a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return; 15630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 15730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 15830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* watch existing subdirectories of USB_FS_DIR */ 15930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood for (i = 1; i < wd_count; i++) { 16030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(path, sizeof(path), "%s/%03d", USB_FS_DIR, i); 1617a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood ret = inotify_add_watch(context->fd, path, IN_CREATE | IN_DELETE); 16230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (ret > 0) 16330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood wds[i] = ret; 16430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 16530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 16630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* check for existing devices first, after we have inotify set up */ 1677a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood done = find_existing_devices(added_cb, removed_cb, client_data); 168a805519ceedc53afa5453a6d8a7d80038d885d9fMike Lockwood if (discovery_done_cb) 169a805519ceedc53afa5453a6d8a7d80038d885d9fMike Lockwood done |= discovery_done_cb(client_data); 17030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 1717a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood while (!done) { 1727a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood ret = read(context->fd, event_buf, sizeof(event_buf)); 17330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (ret >= (int)sizeof(struct inotify_event)) { 17430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood event = (struct inotify_event *)event_buf; 17530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood wd = event->wd; 17630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (wd == wds[0]) { 17730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood i = atoi(event->name); 17830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(path, sizeof(path), "%s/%s", USB_FS_DIR, event->name); 17930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("new subdirectory %s: index: %d\n", path, i); 18030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (i > 0 && i < wd_count) { 1817a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood ret = inotify_add_watch(context->fd, path, IN_CREATE | IN_DELETE); 18230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (ret > 0) 18330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood wds[i] = ret; 18430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 18530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } else { 1867a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood for (i = 1; i < wd_count && !done; i++) { 18730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (wd == wds[i]) { 18830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(path, sizeof(path), "%s/%03d/%s", USB_FS_DIR, i, event->name); 18930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (event->mask == IN_CREATE) { 19030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("new device %s\n", path); 1917a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood done = added_cb(path, client_data); 19230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } else if (event->mask == IN_DELETE) { 19330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("gone device %s\n", path); 1947a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood done = removed_cb(path, client_data); 19530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 19630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 19730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 19830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 19930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 20030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 20130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 20230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 20330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstruct usb_device *usb_device_open(const char *dev_name) 20430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 205cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood int fd, did_retry = 0, writeable = 1; 20630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 20730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodretry: 20830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood fd = open(dev_name, O_RDWR); 20930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (fd < 0) { 21030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* if we fail, see if have read-only access */ 21130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood fd = open(dev_name, O_RDONLY); 212e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood D("usb_device_open open returned %d errno %d\n", fd, errno); 213e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood if (fd < 0 && (errno == EACCES || errno == ENOENT) && !did_retry) { 21430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* work around race condition between inotify and permissions management */ 21530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood sleep(1); 21630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood did_retry = 1; 21730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood goto retry; 21830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 21930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 220cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (fd < 0) 221cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return NULL; 222cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood writeable = 0; 22330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("[ usb open read-only %s fd = %d]\n", dev_name, fd); 22430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 22530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 226cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood struct usb_device* result = usb_device_new(dev_name, fd); 227cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (result) 228cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood result->writeable = writeable; 229cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return result; 230cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood} 231cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 232cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodvoid usb_device_close(struct usb_device *device) 233cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood{ 234cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood close(device->fd); 235cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood free(device); 236cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood} 237cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 238cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodstruct usb_device *usb_device_new(const char *dev_name, int fd) 239cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood{ 240cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood struct usb_device *device = calloc(1, sizeof(struct usb_device)); 241cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood int length; 242cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 243cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (lseek(fd, 0, SEEK_SET) != 0) 244cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood goto failed; 24530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood length = read(fd, device->desc, sizeof(device->desc)); 246cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood D("usb_device_new read returned %d errno %d\n", fd, errno); 24730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (length < 0) 248cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood goto failed; 24930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 25093aff72d9b469f4b77468bab654cd65243b662e6Mike Lockwood strncpy(device->dev_name, dev_name, sizeof(device->dev_name) - 1); 25130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood device->fd = fd; 25230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood device->desc_length = length; 253cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood // assume we are writeable, since usb_device_get_fd will only return writeable fds 254cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood device->writeable = 1; 25530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return device; 256cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 257cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodfailed: 25830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood close(fd); 25930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood free(device); 26030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 26130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 26230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 263cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodstatic int usb_device_reopen_writeable(struct usb_device *device) 26430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 265cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (device->writeable) 266cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return 1; 267cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 268cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood int fd = open(device->dev_name, O_RDWR); 269cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (fd >= 0) { 270cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood close(device->fd); 271cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood device->fd = fd; 272cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood device->writeable = 1; 273cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return 1; 274cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood } 275cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood D("usb_device_reopen_writeable failed errno %d\n", errno); 276cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return 0; 277cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood} 278cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 279cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodint usb_device_get_fd(struct usb_device *device) 280cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood{ 281cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (!usb_device_reopen_writeable(device)) 282cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return -1; 283cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return device->fd; 28430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 28530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 28630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodconst char* usb_device_get_name(struct usb_device *device) 28730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 28830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return device->dev_name; 28930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 29030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 291203f102028c4df33c191d8cd610775eba8d5366dMike Lockwoodint usb_device_get_unique_id(struct usb_device *device) 292203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood{ 293203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood int bus = 0, dev = 0; 294203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood sscanf(device->dev_name, USB_FS_ID_SCANNER, &bus, &dev); 295203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood return bus * 1000 + dev; 296203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood} 297203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood 29807eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwoodint usb_device_get_unique_id_from_name(const char* name) 29907eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood{ 30007eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood int bus = 0, dev = 0; 30107eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood sscanf(name, USB_FS_ID_SCANNER, &bus, &dev); 30207eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood return bus * 1000 + dev; 30307eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood} 30407eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood 3057d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwoodchar* usb_device_get_name_from_unique_id(int id) 3067d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood{ 3077d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood int bus = id / 1000; 3087d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood int dev = id % 1000; 3097d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood char* result = (char *)calloc(1, strlen(USB_FS_ID_FORMAT)); 3107d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood snprintf(result, strlen(USB_FS_ID_FORMAT) - 1, USB_FS_ID_FORMAT, bus, dev); 3117d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood return result; 3127d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood} 3137d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood 31430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwooduint16_t usb_device_get_vendor_id(struct usb_device *device) 31530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 31630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor* desc = (struct usb_device_descriptor*)device->desc; 31730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return __le16_to_cpu(desc->idVendor); 31830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 31930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 32030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwooduint16_t usb_device_get_product_id(struct usb_device *device) 32130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 32230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor* desc = (struct usb_device_descriptor*)device->desc; 32330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return __le16_to_cpu(desc->idProduct); 32430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 32530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 32650372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwoodconst struct usb_device_descriptor* usb_device_get_device_descriptor(struct usb_device *device) 32750372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood{ 32850372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood return (struct usb_device_descriptor*)device->desc; 32950372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood} 33050372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood 3311b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwoodint usb_device_send_control(struct usb_device *device, 3321b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int requestType, 3331b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int request, 3341b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int value, 3351b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int index, 3361b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int length, 3371b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood void* buffer) 33830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 33930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usbdevfs_ctrltransfer ctrl; 34030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 3411b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood // this usually requires read/write permission 342cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (!usb_device_reopen_writeable(device)) 343cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return -1; 34430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 34530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood memset(&ctrl, 0, sizeof(ctrl)); 3461b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood ctrl.bRequestType = requestType; 3471b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood ctrl.bRequest = request; 3481b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood ctrl.wValue = value; 3491b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood ctrl.wIndex = index; 3501b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood ctrl.wLength = length; 3511b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood ctrl.data = buffer; 3521b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood return ioctl(device->fd, USBDEVFS_CONTROL, &ctrl); 3531b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood} 3541b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood 3551b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwoodchar* usb_device_get_string(struct usb_device *device, int id) 3561b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood{ 3571b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood char string[256]; 3581b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood __u16 buffer[128]; 3591b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood __u16 languages[128]; 3601b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int i, result; 3611b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int languageCount = 0; 3621b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood 3631b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood string[0] = 0; 3641b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood memset(languages, 0, sizeof(languages)); 36530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 36630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood // read list of supported languages 3671b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood result = usb_device_send_control(device, 3681b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE, USB_REQ_GET_DESCRIPTOR, 3691b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood (USB_DT_STRING << 8) | 0, 0, sizeof(languages), languages); 37030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (result > 0) 37130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood languageCount = (result - 2) / 2; 37230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 37330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood for (i = 1; i <= languageCount; i++) { 37430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood memset(buffer, 0, sizeof(buffer)); 37530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 3761b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood result = usb_device_send_control(device, 3771b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE, USB_REQ_GET_DESCRIPTOR, 3781b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood (USB_DT_STRING << 8) | id, languages[i], sizeof(buffer), buffer); 37930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (result > 0) { 38030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int i; 38130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood // skip first word, and copy the rest to the string, changing shorts to bytes. 38230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood result /= 2; 38330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood for (i = 1; i < result; i++) 38430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood string[i - 1] = buffer[i]; 38530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood string[i - 1] = 0; 38630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return strdup(string); 38730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 38830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 38930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 39030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 39130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 39230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 39330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodchar* usb_device_get_manufacturer_name(struct usb_device *device) 39430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 39530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc; 39630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 39730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (desc->iManufacturer) 39830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return usb_device_get_string(device, desc->iManufacturer); 39930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood else 40030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 40130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 40230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 40330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodchar* usb_device_get_product_name(struct usb_device *device) 40430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 40530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc; 40630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 40730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (desc->iProduct) 40830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return usb_device_get_string(device, desc->iProduct); 40930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood else 41030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 41130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 41230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 41330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodchar* usb_device_get_serial(struct usb_device *device) 41430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 41530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc; 41630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 41730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (desc->iSerialNumber) 41830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return usb_device_get_string(device, desc->iSerialNumber); 41930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood else 42030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 42130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 42230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 42330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodint usb_device_is_writeable(struct usb_device *device) 42430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 42530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return device->writeable; 42630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 42730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 42830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodvoid usb_descriptor_iter_init(struct usb_device *device, struct usb_descriptor_iter *iter) 42930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 43030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->config = device->desc; 43130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->config_end = device->desc + device->desc_length; 43230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->curr_desc = device->desc; 43330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 43430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 43530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstruct usb_descriptor_header *usb_descriptor_iter_next(struct usb_descriptor_iter *iter) 43630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 43730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_descriptor_header* next; 43830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (iter->curr_desc >= iter->config_end) 43930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 44030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood next = (struct usb_descriptor_header*)iter->curr_desc; 44130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->curr_desc += next->bLength; 44230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return next; 44330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 44430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 44530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodint usb_device_claim_interface(struct usb_device *device, unsigned int interface) 44630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 44730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return ioctl(device->fd, USBDEVFS_CLAIMINTERFACE, &interface); 44830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 44930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 45030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodint usb_device_release_interface(struct usb_device *device, unsigned int interface) 45130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 45230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return ioctl(device->fd, USBDEVFS_RELEASEINTERFACE, &interface); 45330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 45430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 455e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodstruct usb_request *usb_request_new(struct usb_device *dev, 456e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood const struct usb_endpoint_descriptor *ep_desc) 45730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 458e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = calloc(1, sizeof(struct usbdevfs_urb)); 459e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood if (!urb) 460e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 461e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 462e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) 463e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->type = USBDEVFS_URB_TYPE_BULK; 464e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood else if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) 465e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->type = USBDEVFS_URB_TYPE_INTERRUPT; 466e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood else { 467e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood D("Unsupported endpoint type %d", ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); 468e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(urb); 469e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 470e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood } 471e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->endpoint = ep_desc->bEndpointAddress; 472e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 473e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usb_request *req = calloc(1, sizeof(struct usb_request)); 474e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood if (!req) { 475e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(urb); 476e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 477e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood } 478e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 479e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->dev = dev; 480e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->max_packet_size = __le16_to_cpu(ep_desc->wMaxPacketSize); 481e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->private_data = urb; 482e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->usercontext = req; 483e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 484e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return req; 48530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 48630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 487e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodvoid usb_request_free(struct usb_request *req) 48830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 489e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(req->private_data); 490e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(req); 49130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 49230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 493e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodint usb_request_queue(struct usb_request *req) 49430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 495e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = (struct usbdevfs_urb*)req->private_data; 49630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int res; 49730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 49830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood urb->status = -1; 499e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->buffer = req->buffer; 500e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->buffer_length = req->buffer_length; 50130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 50230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood do { 503e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood res = ioctl(req->dev->fd, USBDEVFS_SUBMITURB, urb); 50430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } while((res < 0) && (errno == EINTR)); 50530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 50630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return res; 50730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 50830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 509e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodstruct usb_request *usb_request_wait(struct usb_device *dev) 51030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 511e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = NULL; 512e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usb_request *req = NULL; 51330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int res; 51430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 51530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood while (1) { 516e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood int res = ioctl(dev->fd, USBDEVFS_REAPURB, &urb); 51730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("USBDEVFS_REAPURB returned %d\n", res); 51830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (res < 0) { 51930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(errno == EINTR) { 52030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood continue; 52130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 52230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("[ reap urb - error ]\n"); 523e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 52430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } else { 52530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("[ urb @%p status = %d, actual = %d ]\n", 526e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb, urb->status, urb->actual_length); 527e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req = (struct usb_request*)urb->usercontext; 528e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->actual_length = urb->actual_length; 52930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 53030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood break; 53130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 532e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return req; 53330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 53430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 535e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodint usb_request_cancel(struct usb_request *req) 53630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 537e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = ((struct usbdevfs_urb*)req->private_data); 538e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return ioctl(req->dev->fd, USBDEVFS_DISCARDURB, &urb); 53930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 54030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 541