usbhost.c revision c4c00d8e6a215020be87f6702844267e105e1f0e
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 56c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood// From drivers/usb/core/devio.c 57c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood// I don't know why this isn't in a kernel header 58c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood#define MAX_USBFS_BUFFER_SIZE 16384 5930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 606ac3aa157493ef24bc837b679dd8292fad8961e0Mike Lockwoodstruct usb_host_context { 617a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood int fd; 626ac3aa157493ef24bc837b679dd8292fad8961e0Mike Lockwood}; 636ac3aa157493ef24bc837b679dd8292fad8961e0Mike Lockwood 6430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstruct usb_device { 6530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood char dev_name[64]; 66ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood unsigned char desc[4096]; 6730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int desc_length; 6830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int fd; 6930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int writeable; 7030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood}; 7130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 7230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstatic inline int badname(const char *name) 7330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 7430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood while(*name) { 7530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(!isdigit(*name++)) return 1; 7630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 7730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return 0; 7830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 7930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 807a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood/* returns true if one of the callbacks indicates we are done */ 817a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodstatic int find_existing_devices(usb_device_added_cb added_cb, 827a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood usb_device_removed_cb removed_cb, 837a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood void *client_data) 8430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 8530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood char busname[32], devname[32]; 8630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood DIR *busdir , *devdir ; 8730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct dirent *de; 887a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood int done = 0; 8930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 9030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood busdir = opendir(USB_FS_DIR); 917a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood if(busdir == 0) return 1; 9230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 937a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood while ((de = readdir(busdir)) != 0 && !done) { 9430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(badname(de->d_name)) continue; 9530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 9630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(busname, sizeof busname, "%s/%s", USB_FS_DIR, de->d_name); 9730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood devdir = opendir(busname); 9830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(devdir == 0) continue; 9930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 1007a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood while ((de = readdir(devdir)) && !done) { 10130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(badname(de->d_name)) continue; 10230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 10330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(devname, sizeof devname, "%s/%s", busname, de->d_name); 1047a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood done = added_cb(devname, client_data); 10530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } // end of devdir while 10630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood closedir(devdir); 10730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } //end of busdir while 10830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood closedir(busdir); 1097a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood 1107a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return done; 1117a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood} 1127a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood 1137a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodstruct usb_host_context *usb_host_init() 1147a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood{ 1157a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood struct usb_host_context *context = calloc(1, sizeof(struct usb_host_context)); 1167a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood if (!context) { 1177a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood fprintf(stderr, "out of memory in usb_host_context\n"); 1187a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return NULL; 1197a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood } 1207a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood context->fd = inotify_init(); 1217a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood if (context->fd < 0) { 1227a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood fprintf(stderr, "inotify_init failed\n"); 1237a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood free(context); 1247a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return NULL; 1257a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood } 1267a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return context; 1277a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood} 1287a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood 1297a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodvoid usb_host_cleanup(struct usb_host_context *context) 1307a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood{ 1317a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood close(context->fd); 1327a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood free(context); 13330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 13430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 1357a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodvoid usb_host_run(struct usb_host_context *context, 1367a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood usb_device_added_cb added_cb, 1377a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood usb_device_removed_cb removed_cb, 138a805519ceedc53afa5453a6d8a7d80038d885d9fMike Lockwood usb_discovery_done_cb discovery_done_cb, 1397a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood void *client_data) 14030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 14130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct inotify_event* event; 14230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood char event_buf[512]; 14330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood char path[100]; 1447a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood int i, ret, done = 0; 14530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int wd, wds[10]; 14630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int wd_count = sizeof(wds) / sizeof(wds[0]); 14730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 14830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("Created device discovery thread\n"); 14930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 15030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* watch for files added and deleted within USB_FS_DIR */ 15130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood memset(wds, 0, sizeof(wds)); 15230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* watch the root for new subdirectories */ 1537a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood wds[0] = inotify_add_watch(context->fd, USB_FS_DIR, IN_CREATE | IN_DELETE); 15430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (wds[0] < 0) { 15530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood fprintf(stderr, "inotify_add_watch failed\n"); 156e8849d190a3097274dcb64416e564538a1017054Mike Lockwood if (discovery_done_cb) 157e8849d190a3097274dcb64416e564538a1017054Mike Lockwood discovery_done_cb(client_data); 1587a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return; 15930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 16030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 16130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* watch existing subdirectories of USB_FS_DIR */ 16230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood for (i = 1; i < wd_count; i++) { 16330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(path, sizeof(path), "%s/%03d", USB_FS_DIR, i); 1647a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood ret = inotify_add_watch(context->fd, path, IN_CREATE | IN_DELETE); 16530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (ret > 0) 16630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood wds[i] = ret; 16730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 16830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 16930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* check for existing devices first, after we have inotify set up */ 1707a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood done = find_existing_devices(added_cb, removed_cb, client_data); 171a805519ceedc53afa5453a6d8a7d80038d885d9fMike Lockwood if (discovery_done_cb) 172a805519ceedc53afa5453a6d8a7d80038d885d9fMike Lockwood done |= discovery_done_cb(client_data); 17330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 1747a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood while (!done) { 1757a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood ret = read(context->fd, event_buf, sizeof(event_buf)); 17630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (ret >= (int)sizeof(struct inotify_event)) { 17730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood event = (struct inotify_event *)event_buf; 17830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood wd = event->wd; 17930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (wd == wds[0]) { 18030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood i = atoi(event->name); 18130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(path, sizeof(path), "%s/%s", USB_FS_DIR, event->name); 18230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("new subdirectory %s: index: %d\n", path, i); 18330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (i > 0 && i < wd_count) { 1847a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood ret = inotify_add_watch(context->fd, path, IN_CREATE | IN_DELETE); 18530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (ret > 0) 18630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood wds[i] = ret; 18730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 18830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } else { 1897a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood for (i = 1; i < wd_count && !done; i++) { 19030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (wd == wds[i]) { 19130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood snprintf(path, sizeof(path), "%s/%03d/%s", USB_FS_DIR, i, event->name); 19230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (event->mask == IN_CREATE) { 19330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("new device %s\n", path); 1947a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood done = added_cb(path, client_data); 19530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } else if (event->mask == IN_DELETE) { 19630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("gone device %s\n", path); 1977a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood done = removed_cb(path, client_data); 19830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 19930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 20030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 20130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 20230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 20330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 20430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 20530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 20630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstruct usb_device *usb_device_open(const char *dev_name) 20730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 208cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood int fd, did_retry = 0, writeable = 1; 20930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 210ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood D("usb_device_open %s\n", dev_name); 211ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood 21230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodretry: 21330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood fd = open(dev_name, O_RDWR); 21430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (fd < 0) { 21530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* if we fail, see if have read-only access */ 21630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood fd = open(dev_name, O_RDONLY); 217e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood D("usb_device_open open returned %d errno %d\n", fd, errno); 218e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood if (fd < 0 && (errno == EACCES || errno == ENOENT) && !did_retry) { 21930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* work around race condition between inotify and permissions management */ 22030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood sleep(1); 22130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood did_retry = 1; 22230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood goto retry; 22330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 22430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 225cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (fd < 0) 226cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return NULL; 227cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood writeable = 0; 22830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("[ usb open read-only %s fd = %d]\n", dev_name, fd); 22930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 23030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 231cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood struct usb_device* result = usb_device_new(dev_name, fd); 232cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (result) 233cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood result->writeable = writeable; 234cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return result; 235cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood} 236cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 237cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodvoid usb_device_close(struct usb_device *device) 238cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood{ 239cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood close(device->fd); 240cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood free(device); 241cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood} 242cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 243cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodstruct usb_device *usb_device_new(const char *dev_name, int fd) 244cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood{ 245cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood struct usb_device *device = calloc(1, sizeof(struct usb_device)); 246cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood int length; 247cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 248ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood D("usb_device_new %s fd: %d\n", dev_name, fd); 249ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood 250cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (lseek(fd, 0, SEEK_SET) != 0) 251cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood goto failed; 25230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood length = read(fd, device->desc, sizeof(device->desc)); 253ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood D("usb_device_new read returned %d errno %d\n", length, errno); 25430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (length < 0) 255cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood goto failed; 25630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 25793aff72d9b469f4b77468bab654cd65243b662e6Mike Lockwood strncpy(device->dev_name, dev_name, sizeof(device->dev_name) - 1); 25830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood device->fd = fd; 25930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood device->desc_length = length; 260cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood // assume we are writeable, since usb_device_get_fd will only return writeable fds 261cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood device->writeable = 1; 26230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return device; 263cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 264cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodfailed: 26530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood close(fd); 26630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood free(device); 26730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 26830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 26930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 270cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodstatic int usb_device_reopen_writeable(struct usb_device *device) 27130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 272cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (device->writeable) 273cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return 1; 274cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 275cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood int fd = open(device->dev_name, O_RDWR); 276cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (fd >= 0) { 277cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood close(device->fd); 278cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood device->fd = fd; 279cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood device->writeable = 1; 280cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return 1; 281cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood } 282cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood D("usb_device_reopen_writeable failed errno %d\n", errno); 283cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return 0; 284cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood} 285cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 286cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodint usb_device_get_fd(struct usb_device *device) 287cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood{ 288cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (!usb_device_reopen_writeable(device)) 289cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return -1; 290cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return device->fd; 29130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 29230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 29330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodconst char* usb_device_get_name(struct usb_device *device) 29430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 29530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return device->dev_name; 29630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 29730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 298203f102028c4df33c191d8cd610775eba8d5366dMike Lockwoodint usb_device_get_unique_id(struct usb_device *device) 299203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood{ 300203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood int bus = 0, dev = 0; 301203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood sscanf(device->dev_name, USB_FS_ID_SCANNER, &bus, &dev); 302203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood return bus * 1000 + dev; 303203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood} 304203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood 30507eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwoodint usb_device_get_unique_id_from_name(const char* name) 30607eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood{ 30707eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood int bus = 0, dev = 0; 30807eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood sscanf(name, USB_FS_ID_SCANNER, &bus, &dev); 30907eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood return bus * 1000 + dev; 31007eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood} 31107eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood 3127d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwoodchar* usb_device_get_name_from_unique_id(int id) 3137d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood{ 3147d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood int bus = id / 1000; 3157d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood int dev = id % 1000; 3167d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood char* result = (char *)calloc(1, strlen(USB_FS_ID_FORMAT)); 3177d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood snprintf(result, strlen(USB_FS_ID_FORMAT) - 1, USB_FS_ID_FORMAT, bus, dev); 3187d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood return result; 3197d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood} 3207d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood 32130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwooduint16_t usb_device_get_vendor_id(struct usb_device *device) 32230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 32330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor* desc = (struct usb_device_descriptor*)device->desc; 32430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return __le16_to_cpu(desc->idVendor); 32530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 32630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 32730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwooduint16_t usb_device_get_product_id(struct usb_device *device) 32830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 32930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor* desc = (struct usb_device_descriptor*)device->desc; 33030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return __le16_to_cpu(desc->idProduct); 33130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 33230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 33350372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwoodconst struct usb_device_descriptor* usb_device_get_device_descriptor(struct usb_device *device) 33450372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood{ 33550372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood return (struct usb_device_descriptor*)device->desc; 33650372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood} 33750372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood 3381b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwoodchar* usb_device_get_string(struct usb_device *device, int id) 3391b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood{ 3401b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood char string[256]; 3411b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood __u16 buffer[128]; 3421b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood __u16 languages[128]; 3431b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int i, result; 3441b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int languageCount = 0; 3451b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood 3461b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood string[0] = 0; 3471b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood memset(languages, 0, sizeof(languages)); 34830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 34930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood // read list of supported languages 350120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood result = usb_device_control_transfer(device, 3511b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE, USB_REQ_GET_DESCRIPTOR, 352120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood (USB_DT_STRING << 8) | 0, 0, languages, sizeof(languages), 0); 35330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (result > 0) 35430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood languageCount = (result - 2) / 2; 35530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 35630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood for (i = 1; i <= languageCount; i++) { 35730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood memset(buffer, 0, sizeof(buffer)); 35830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 359120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood result = usb_device_control_transfer(device, 3601b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE, USB_REQ_GET_DESCRIPTOR, 361120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood (USB_DT_STRING << 8) | id, languages[i], buffer, sizeof(buffer), 0); 36230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (result > 0) { 36330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int i; 36430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood // skip first word, and copy the rest to the string, changing shorts to bytes. 36530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood result /= 2; 36630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood for (i = 1; i < result; i++) 36730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood string[i - 1] = buffer[i]; 36830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood string[i - 1] = 0; 36930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return strdup(string); 37030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 37130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 37230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 37330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 37430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 37530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 37630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodchar* usb_device_get_manufacturer_name(struct usb_device *device) 37730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 37830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc; 37930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 38030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (desc->iManufacturer) 38130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return usb_device_get_string(device, desc->iManufacturer); 38230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood else 38330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 38430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 38530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 38630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodchar* usb_device_get_product_name(struct usb_device *device) 38730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 38830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc; 38930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 39030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (desc->iProduct) 39130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return usb_device_get_string(device, desc->iProduct); 39230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood else 39330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 39430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 39530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 39630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodchar* usb_device_get_serial(struct usb_device *device) 39730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 39830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc; 39930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 40030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (desc->iSerialNumber) 40130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return usb_device_get_string(device, desc->iSerialNumber); 40230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood else 40330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 40430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 40530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 40630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodint usb_device_is_writeable(struct usb_device *device) 40730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 40830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return device->writeable; 40930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 41030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 41130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodvoid usb_descriptor_iter_init(struct usb_device *device, struct usb_descriptor_iter *iter) 41230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 41330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->config = device->desc; 41430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->config_end = device->desc + device->desc_length; 41530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->curr_desc = device->desc; 41630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 41730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 41830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstruct usb_descriptor_header *usb_descriptor_iter_next(struct usb_descriptor_iter *iter) 41930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 42030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_descriptor_header* next; 42130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (iter->curr_desc >= iter->config_end) 42230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 42330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood next = (struct usb_descriptor_header*)iter->curr_desc; 42430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->curr_desc += next->bLength; 42530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return next; 42630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 42730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 42830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodint usb_device_claim_interface(struct usb_device *device, unsigned int interface) 42930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 43030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return ioctl(device->fd, USBDEVFS_CLAIMINTERFACE, &interface); 43130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 43230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 43330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodint usb_device_release_interface(struct usb_device *device, unsigned int interface) 43430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 43530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return ioctl(device->fd, USBDEVFS_RELEASEINTERFACE, &interface); 43630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 43730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 438ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwoodint usb_device_connect_kernel_driver(struct usb_device *device, 439ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood unsigned int interface, int connect) 440ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood{ 441ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood struct usbdevfs_ioctl ctl; 442ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood 443ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood ctl.ifno = interface; 444ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood ctl.ioctl_code = (connect ? USBDEVFS_CONNECT : USBDEVFS_DISCONNECT); 445ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood ctl.data = NULL; 446ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood return ioctl(device->fd, USBDEVFS_IOCTL, &ctl); 447ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood} 448ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood 449120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwoodint usb_device_control_transfer(struct usb_device *device, 450120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int requestType, 451120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int request, 452120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int value, 453120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int index, 454120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood void* buffer, 455120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int length, 456120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood unsigned int timeout) 457120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood{ 458120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood struct usbdevfs_ctrltransfer ctrl; 459120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 460120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood // this usually requires read/write permission 461120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood if (!usb_device_reopen_writeable(device)) 462120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood return -1; 463120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 464120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood memset(&ctrl, 0, sizeof(ctrl)); 465120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.bRequestType = requestType; 466120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.bRequest = request; 467120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.wValue = value; 468120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.wIndex = index; 469120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.wLength = length; 470120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.data = buffer; 471120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.timeout = timeout; 472120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood return ioctl(device->fd, USBDEVFS_CONTROL, &ctrl); 473120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood} 474120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 475120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwoodint usb_device_bulk_transfer(struct usb_device *device, 476120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int endpoint, 477120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood void* buffer, 478120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int length, 479120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood unsigned int timeout) 480120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood{ 481120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood struct usbdevfs_bulktransfer ctrl; 482120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 483c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood // need to limit request size to avoid EINVAL 484c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood if (length > MAX_USBFS_BUFFER_SIZE) 485c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood length = MAX_USBFS_BUFFER_SIZE; 486c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood 487120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood memset(&ctrl, 0, sizeof(ctrl)); 488120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.ep = endpoint; 489120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.len = length; 490120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.data = buffer; 491120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.timeout = timeout; 492120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood return ioctl(device->fd, USBDEVFS_BULK, &ctrl); 493120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood} 494120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 495e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodstruct usb_request *usb_request_new(struct usb_device *dev, 496e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood const struct usb_endpoint_descriptor *ep_desc) 49730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 498e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = calloc(1, sizeof(struct usbdevfs_urb)); 499e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood if (!urb) 500e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 501e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 502e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) 503e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->type = USBDEVFS_URB_TYPE_BULK; 504e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood else if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) 505e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->type = USBDEVFS_URB_TYPE_INTERRUPT; 506e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood else { 507e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood D("Unsupported endpoint type %d", ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); 508e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(urb); 509e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 510e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood } 511e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->endpoint = ep_desc->bEndpointAddress; 512e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 513e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usb_request *req = calloc(1, sizeof(struct usb_request)); 514e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood if (!req) { 515e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(urb); 516e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 517e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood } 518e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 519e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->dev = dev; 520e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->max_packet_size = __le16_to_cpu(ep_desc->wMaxPacketSize); 521e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->private_data = urb; 522b5d68a3c28d0b7a947373344cbda2a2369d0b67dMike Lockwood req->endpoint = urb->endpoint; 523e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->usercontext = req; 524e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 525e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return req; 52630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 52730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 528e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodvoid usb_request_free(struct usb_request *req) 52930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 530e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(req->private_data); 531e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(req); 53230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 53330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 534e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodint usb_request_queue(struct usb_request *req) 53530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 536e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = (struct usbdevfs_urb*)req->private_data; 53730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int res; 53830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 53930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood urb->status = -1; 540e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->buffer = req->buffer; 541c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood // need to limit request size to avoid EINVAL 542c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood if (req->buffer_length > MAX_USBFS_BUFFER_SIZE) 543c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood urb->buffer_length = MAX_USBFS_BUFFER_SIZE; 544c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood else 545c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood urb->buffer_length = req->buffer_length; 54630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 54730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood do { 548e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood res = ioctl(req->dev->fd, USBDEVFS_SUBMITURB, urb); 54930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } while((res < 0) && (errno == EINTR)); 55030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 55130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return res; 55230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 55330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 554e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodstruct usb_request *usb_request_wait(struct usb_device *dev) 55530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 556e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = NULL; 557e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usb_request *req = NULL; 55830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int res; 55930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 56030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood while (1) { 561e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood int res = ioctl(dev->fd, USBDEVFS_REAPURB, &urb); 56230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("USBDEVFS_REAPURB returned %d\n", res); 56330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (res < 0) { 56430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(errno == EINTR) { 56530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood continue; 56630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 56730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("[ reap urb - error ]\n"); 568e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 56930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } else { 57030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("[ urb @%p status = %d, actual = %d ]\n", 571e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb, urb->status, urb->actual_length); 572e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req = (struct usb_request*)urb->usercontext; 573e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->actual_length = urb->actual_length; 57430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 57530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood break; 57630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 577e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return req; 57830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 57930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 580e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodint usb_request_cancel(struct usb_request *req) 58130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 582e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = ((struct usbdevfs_urb*)req->private_data); 583e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return ioctl(req->dev->fd, USBDEVFS_DISCARDURB, &urb); 58430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 58530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 586