usbhost.c revision f75ea8d082ff39e316bd4d73979b610cc4b5e4bc
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" 238d66c49258ac4f59bd67c23c9c914cca81f85b01Steve Block#define D ALOGD 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> 36dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet#include <stddef.h> 3730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 3830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <sys/ioctl.h> 3930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <sys/types.h> 4030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <sys/time.h> 4130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <sys/inotify.h> 4230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <dirent.h> 4330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <fcntl.h> 4430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <errno.h> 4530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <ctype.h> 4630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <pthread.h> 4730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 4830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <linux/usbdevice_fs.h> 4930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include <asm/byteorder.h> 5030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 5130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood#include "usbhost/usbhost.h" 5230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 53f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby#define DEV_DIR "/dev" 54dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet#define USB_FS_DIR DEV_DIR "/bus/usb" 55dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet#define USB_FS_ID_SCANNER USB_FS_DIR "/%d/%d" 56dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet#define USB_FS_ID_FORMAT USB_FS_DIR "/%03d/%03d" 5730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 58c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood// From drivers/usb/core/devio.c 59c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood// I don't know why this isn't in a kernel header 60c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood#define MAX_USBFS_BUFFER_SIZE 16384 6130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 62dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet#define MAX_USBFS_WD_COUNT 10 63dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 646ac3aa157493ef24bc837b679dd8292fad8961e0Mike Lockwoodstruct usb_host_context { 65dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet int fd; 66dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet usb_device_added_cb cb_added; 67dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet usb_device_removed_cb cb_removed; 68dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet void *data; 69dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet int wds[MAX_USBFS_WD_COUNT]; 70dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet int wdd; 716ac3aa157493ef24bc837b679dd8292fad8961e0Mike Lockwood}; 726ac3aa157493ef24bc837b679dd8292fad8961e0Mike Lockwood 7330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstruct usb_device { 7430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood char dev_name[64]; 75ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood unsigned char desc[4096]; 7630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int desc_length; 7730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int fd; 7830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int writeable; 7930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood}; 8030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 8130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstatic inline int badname(const char *name) 8230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 8330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood while(*name) { 8430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(!isdigit(*name++)) return 1; 8530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 8630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return 0; 8730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 8830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 896cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Gobystatic int find_existing_devices_bus(char *busname, 906cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby usb_device_added_cb added_cb, 916cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby void *client_data) 926cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby{ 936cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby char devname[32]; 946cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby DIR *devdir; 956cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby struct dirent *de; 966cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby int done = 0; 976cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby 986cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby devdir = opendir(busname); 996cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby if(devdir == 0) return 0; 1006cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby 1016cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby while ((de = readdir(devdir)) && !done) { 1026cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby if(badname(de->d_name)) continue; 1036cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby 1046cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby snprintf(devname, sizeof(devname), "%s/%s", busname, de->d_name); 1056cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby done = added_cb(devname, client_data); 1066cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby } // end of devdir while 1076cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby closedir(devdir); 1086cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby 1096cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby return done; 1106cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby} 1116cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby 1127a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood/* returns true if one of the callbacks indicates we are done */ 1137a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodstatic int find_existing_devices(usb_device_added_cb added_cb, 1147a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood void *client_data) 11530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 1166cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby char busname[32]; 1176cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby DIR *busdir; 11830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct dirent *de; 1197a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood int done = 0; 12030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 12130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood busdir = opendir(USB_FS_DIR); 122f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby if(busdir == 0) return 0; 12330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 1247a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood while ((de = readdir(busdir)) != 0 && !done) { 12530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(badname(de->d_name)) continue; 12630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 127dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet snprintf(busname, sizeof(busname), USB_FS_DIR "/%s", de->d_name); 1286cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby done = find_existing_devices_bus(busname, added_cb, 1296cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby client_data); 130dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet } //end of busdir while 13130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood closedir(busdir); 1327a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood 1337a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return done; 1347a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood} 1357a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood 136f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Gobystatic void watch_existing_subdirs(struct usb_host_context *context, 137f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby int *wds, int wd_count) 138f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby{ 139f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby char path[100]; 140f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby int i, ret; 141f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby 142f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby wds[0] = inotify_add_watch(context->fd, USB_FS_DIR, IN_CREATE | IN_DELETE); 143f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby if (wds[0] < 0) 144f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby return; 145f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby 146f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby /* watch existing subdirectories of USB_FS_DIR */ 147f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby for (i = 1; i < wd_count; i++) { 148dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet snprintf(path, sizeof(path), USB_FS_DIR "/%03d", i); 149f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby ret = inotify_add_watch(context->fd, path, IN_CREATE | IN_DELETE); 150f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby if (ret >= 0) 151f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby wds[i] = ret; 152f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby } 153f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby} 154f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby 1557a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodstruct usb_host_context *usb_host_init() 1567a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood{ 1577a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood struct usb_host_context *context = calloc(1, sizeof(struct usb_host_context)); 1587a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood if (!context) { 1597a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood fprintf(stderr, "out of memory in usb_host_context\n"); 1607a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return NULL; 1617a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood } 1627a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood context->fd = inotify_init(); 1637a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood if (context->fd < 0) { 1647a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood fprintf(stderr, "inotify_init failed\n"); 1657a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood free(context); 1667a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return NULL; 1677a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood } 1687a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood return context; 1697a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood} 1707a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood 1717a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwoodvoid usb_host_cleanup(struct usb_host_context *context) 1727a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood{ 1737a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood close(context->fd); 1747a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood free(context); 17530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 17630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 177dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquetint usb_host_get_fd(struct usb_host_context *context) 178dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet{ 179dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet return context->fd; 180dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet} /* usb_host_get_fd() */ 181dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 182dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquetint usb_host_load(struct usb_host_context *context, 1837a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood usb_device_added_cb added_cb, 1847a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood usb_device_removed_cb removed_cb, 185a805519ceedc53afa5453a6d8a7d80038d885d9fMike Lockwood usb_discovery_done_cb discovery_done_cb, 1867a96ba436c9a2bacc64e712bdb53bd7accc5c3a9Mike Lockwood void *client_data) 18730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 188dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet int done = 0; 189dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet int i; 190dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 191dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet context->cb_added = added_cb; 192dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet context->cb_removed = removed_cb; 193dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet context->data = client_data; 19430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 19530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("Created device discovery thread\n"); 19630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 19730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* watch for files added and deleted within USB_FS_DIR */ 198dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet for (i = 0; i < MAX_USBFS_WD_COUNT; i++) 199dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet context->wds[i] = -1; 200f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby 20130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* watch the root for new subdirectories */ 202dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet context->wdd = inotify_add_watch(context->fd, DEV_DIR, IN_CREATE | IN_DELETE); 203dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet if (context->wdd < 0) { 20430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood fprintf(stderr, "inotify_add_watch failed\n"); 205e8849d190a3097274dcb64416e564538a1017054Mike Lockwood if (discovery_done_cb) 206e8849d190a3097274dcb64416e564538a1017054Mike Lockwood discovery_done_cb(client_data); 207dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet return done; 20830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 20930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 210dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet watch_existing_subdirs(context, context->wds, MAX_USBFS_WD_COUNT); 21130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 21230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* check for existing devices first, after we have inotify set up */ 2136cc883ca098f34bd126478a6aa19d5cce48d71a9Benoit Goby done = find_existing_devices(added_cb, client_data); 214a805519ceedc53afa5453a6d8a7d80038d885d9fMike Lockwood if (discovery_done_cb) 215a805519ceedc53afa5453a6d8a7d80038d885d9fMike Lockwood done |= discovery_done_cb(client_data); 21630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 217dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet return done; 218dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet} /* usb_host_load() */ 219dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 220dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquetint usb_host_read_event(struct usb_host_context *context) 221dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet{ 222dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet struct inotify_event* event; 223dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet char event_buf[512]; 224dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet char path[100]; 225dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet int i, ret, done = 0; 226f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel int offset = 0; 227dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet int wd; 228dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 229dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet ret = read(context->fd, event_buf, sizeof(event_buf)); 230dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet if (ret >= (int)sizeof(struct inotify_event)) { 231f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel while (offset < ret) { 232f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel event = (struct inotify_event*)&event_buf[offset]; 233f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel done = 0; 234f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel wd = event->wd; 235f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel if (wd == context->wdd) { 236f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel if ((event->mask & IN_CREATE) && !strcmp(event->name, "bus")) { 237f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel watch_existing_subdirs(context, context->wds, MAX_USBFS_WD_COUNT); 238f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel done = find_existing_devices(context->cb_added, context->data); 239f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel } else if ((event->mask & IN_DELETE) && !strcmp(event->name, "bus")) { 240f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel for (i = 0; i < MAX_USBFS_WD_COUNT; i++) { 241f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel if (context->wds[i] >= 0) { 242f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel inotify_rm_watch(context->fd, context->wds[i]); 243f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel context->wds[i] = -1; 244f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel } 245f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel } 246f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel } 247f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel } else if (wd == context->wds[0]) { 248f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel i = atoi(event->name); 249f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel snprintf(path, sizeof(path), USB_FS_DIR "/%s", event->name); 250f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel D("%s subdirectory %s: index: %d\n", (event->mask & IN_CREATE) ? 251f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel "new" : "gone", path, i); 252f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel if (i > 0 && i < MAX_USBFS_WD_COUNT) { 253f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel if (event->mask & IN_CREATE) { 254f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel ret = inotify_add_watch(context->fd, path, 255f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel IN_CREATE | IN_DELETE); 256f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel if (ret >= 0) 257f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel context->wds[i] = ret; 258f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel done = find_existing_devices_bus(path, context->cb_added, 259f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel context->data); 260f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel } else if (event->mask & IN_DELETE) { 261dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet inotify_rm_watch(context->fd, context->wds[i]); 262dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet context->wds[i] = -1; 263f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby } 264f4de078388242fff9b68c04b122e8a095cab9b0eBenoit Goby } 265f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel } else { 266f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel for (i = 1; (i < MAX_USBFS_WD_COUNT) && !done; i++) { 267f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel if (wd == context->wds[i]) { 268f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel snprintf(path, sizeof(path), USB_FS_DIR "/%03d/%s", i, event->name); 269f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel if (event->mask == IN_CREATE) { 270f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel D("new device %s\n", path); 271f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel done = context->cb_added(path, context->data); 272f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel } else if (event->mask == IN_DELETE) { 273f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel D("gone device %s\n", path); 274f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel done = context->cb_removed(path, context->data); 275f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel } 27630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 27730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 27830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 279f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel 280f75ea8d082ff39e316bd4d73979b610cc4b5e4bcZiv Hendel offset += sizeof(struct inotify_event) + event->len; 28130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 28230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 283dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 284dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet return done; 285dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet} /* usb_host_read_event() */ 286dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 287dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquetvoid usb_host_run(struct usb_host_context *context, 288dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet usb_device_added_cb added_cb, 289dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet usb_device_removed_cb removed_cb, 290dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet usb_discovery_done_cb discovery_done_cb, 291dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet void *client_data) 292dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet{ 293dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet int done; 294dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 295dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet done = usb_host_load(context, added_cb, removed_cb, discovery_done_cb, client_data); 296dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 297dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet while (!done) { 298dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet 299dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet done = usb_host_read_event(context); 300dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet } 301dea46b6657845a366d13f57c720eab28c9062ab7Guillaume Ranquet} /* usb_host_run() */ 30230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 30330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstruct usb_device *usb_device_open(const char *dev_name) 30430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 305cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood int fd, did_retry = 0, writeable = 1; 30630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 307ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood D("usb_device_open %s\n", dev_name); 308ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood 30930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodretry: 31030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood fd = open(dev_name, O_RDWR); 31130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (fd < 0) { 31230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* if we fail, see if have read-only access */ 31330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood fd = open(dev_name, O_RDONLY); 314e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood D("usb_device_open open returned %d errno %d\n", fd, errno); 315e15af09876c5e0301084f46b8036aed147cf9c24Mike Lockwood if (fd < 0 && (errno == EACCES || errno == ENOENT) && !did_retry) { 31630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood /* work around race condition between inotify and permissions management */ 31730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood sleep(1); 31830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood did_retry = 1; 31930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood goto retry; 32030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 32130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 322cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (fd < 0) 323cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return NULL; 324cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood writeable = 0; 32530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("[ usb open read-only %s fd = %d]\n", dev_name, fd); 32630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 32730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 328cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood struct usb_device* result = usb_device_new(dev_name, fd); 329cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (result) 330cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood result->writeable = writeable; 331cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return result; 332cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood} 333cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 334cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodvoid usb_device_close(struct usb_device *device) 335cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood{ 336cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood close(device->fd); 337cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood free(device); 338cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood} 339cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 340cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodstruct usb_device *usb_device_new(const char *dev_name, int fd) 341cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood{ 342cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood struct usb_device *device = calloc(1, sizeof(struct usb_device)); 343cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood int length; 344cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 345ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood D("usb_device_new %s fd: %d\n", dev_name, fd); 346ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood 347cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (lseek(fd, 0, SEEK_SET) != 0) 348cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood goto failed; 34930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood length = read(fd, device->desc, sizeof(device->desc)); 350ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood D("usb_device_new read returned %d errno %d\n", length, errno); 35130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (length < 0) 352cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood goto failed; 35330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 35493aff72d9b469f4b77468bab654cd65243b662e6Mike Lockwood strncpy(device->dev_name, dev_name, sizeof(device->dev_name) - 1); 35530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood device->fd = fd; 35630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood device->desc_length = length; 357cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood // assume we are writeable, since usb_device_get_fd will only return writeable fds 358cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood device->writeable = 1; 35930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return device; 360cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 361cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodfailed: 36230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood close(fd); 36330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood free(device); 36430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 36530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 36630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 367cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodstatic int usb_device_reopen_writeable(struct usb_device *device) 36830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 369cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (device->writeable) 370cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return 1; 371cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 372cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood int fd = open(device->dev_name, O_RDWR); 373cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (fd >= 0) { 374cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood close(device->fd); 375cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood device->fd = fd; 376cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood device->writeable = 1; 377cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return 1; 378cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood } 379cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood D("usb_device_reopen_writeable failed errno %d\n", errno); 380cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return 0; 381cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood} 382cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood 383cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwoodint usb_device_get_fd(struct usb_device *device) 384cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood{ 385cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood if (!usb_device_reopen_writeable(device)) 386cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return -1; 387cd185f23cc6f062b252d1d19bca55e721290ee62Mike Lockwood return device->fd; 38830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 38930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 39030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodconst char* usb_device_get_name(struct usb_device *device) 39130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 39230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return device->dev_name; 39330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 39430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 395203f102028c4df33c191d8cd610775eba8d5366dMike Lockwoodint usb_device_get_unique_id(struct usb_device *device) 396203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood{ 397203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood int bus = 0, dev = 0; 398203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood sscanf(device->dev_name, USB_FS_ID_SCANNER, &bus, &dev); 399203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood return bus * 1000 + dev; 400203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood} 401203f102028c4df33c191d8cd610775eba8d5366dMike Lockwood 40207eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwoodint usb_device_get_unique_id_from_name(const char* name) 40307eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood{ 40407eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood int bus = 0, dev = 0; 40507eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood sscanf(name, USB_FS_ID_SCANNER, &bus, &dev); 40607eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood return bus * 1000 + dev; 40707eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood} 40807eb4af174f31c449a86dd459e2c81702f74acf1Mike Lockwood 4097d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwoodchar* usb_device_get_name_from_unique_id(int id) 4107d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood{ 4117d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood int bus = id / 1000; 4127d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood int dev = id % 1000; 4137d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood char* result = (char *)calloc(1, strlen(USB_FS_ID_FORMAT)); 4147d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood snprintf(result, strlen(USB_FS_ID_FORMAT) - 1, USB_FS_ID_FORMAT, bus, dev); 4157d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood return result; 4167d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood} 4177d700f8bdce747a26e3ee4737683194d77286ba3Mike Lockwood 41830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwooduint16_t usb_device_get_vendor_id(struct usb_device *device) 41930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 42030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor* desc = (struct usb_device_descriptor*)device->desc; 42130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return __le16_to_cpu(desc->idVendor); 42230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 42330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 42430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwooduint16_t usb_device_get_product_id(struct usb_device *device) 42530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 42630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor* desc = (struct usb_device_descriptor*)device->desc; 42730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return __le16_to_cpu(desc->idProduct); 42830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 42930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 43050372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwoodconst struct usb_device_descriptor* usb_device_get_device_descriptor(struct usb_device *device) 43150372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood{ 43250372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood return (struct usb_device_descriptor*)device->desc; 43350372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood} 43450372073d2919480fb32d56cb3b91663b9fca0f1Mike Lockwood 4351b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwoodchar* usb_device_get_string(struct usb_device *device, int id) 4361b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood{ 4371b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood char string[256]; 4381b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood __u16 buffer[128]; 4391b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood __u16 languages[128]; 4401b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int i, result; 4411b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood int languageCount = 0; 4421b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood 4431b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood string[0] = 0; 4441b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood memset(languages, 0, sizeof(languages)); 44530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 44630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood // read list of supported languages 447120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood result = usb_device_control_transfer(device, 4481b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE, USB_REQ_GET_DESCRIPTOR, 449120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood (USB_DT_STRING << 8) | 0, 0, languages, sizeof(languages), 0); 45030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (result > 0) 45130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood languageCount = (result - 2) / 2; 45230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 45330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood for (i = 1; i <= languageCount; i++) { 45430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood memset(buffer, 0, sizeof(buffer)); 45530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 456120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood result = usb_device_control_transfer(device, 4571b7d991b433cf6d6fae4f40cb37f9b6c6043cfbcMike Lockwood USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE, USB_REQ_GET_DESCRIPTOR, 458120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood (USB_DT_STRING << 8) | id, languages[i], buffer, sizeof(buffer), 0); 45930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (result > 0) { 46030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int i; 46130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood // skip first word, and copy the rest to the string, changing shorts to bytes. 46230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood result /= 2; 46330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood for (i = 1; i < result; i++) 46430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood string[i - 1] = buffer[i]; 46530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood string[i - 1] = 0; 46630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return strdup(string); 46730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 46830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 46930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 47030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 47130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 47230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 47330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodchar* usb_device_get_manufacturer_name(struct usb_device *device) 47430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 47530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc; 47630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 47730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (desc->iManufacturer) 47830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return usb_device_get_string(device, desc->iManufacturer); 47930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood else 48030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 48130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 48230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 48330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodchar* usb_device_get_product_name(struct usb_device *device) 48430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 48530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc; 48630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 48730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (desc->iProduct) 48830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return usb_device_get_string(device, desc->iProduct); 48930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood else 49030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 49130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 49230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 49330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodchar* usb_device_get_serial(struct usb_device *device) 49430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 49530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc; 49630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 49730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (desc->iSerialNumber) 49830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return usb_device_get_string(device, desc->iSerialNumber); 49930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood else 50030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 50130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 50230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 50330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodint usb_device_is_writeable(struct usb_device *device) 50430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 50530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return device->writeable; 50630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 50730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 50830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodvoid usb_descriptor_iter_init(struct usb_device *device, struct usb_descriptor_iter *iter) 50930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 51030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->config = device->desc; 51130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->config_end = device->desc + device->desc_length; 51230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->curr_desc = device->desc; 51330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 51430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 51530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodstruct usb_descriptor_header *usb_descriptor_iter_next(struct usb_descriptor_iter *iter) 51630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 51730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood struct usb_descriptor_header* next; 51830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (iter->curr_desc >= iter->config_end) 51930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return NULL; 52030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood next = (struct usb_descriptor_header*)iter->curr_desc; 52130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood iter->curr_desc += next->bLength; 52230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return next; 52330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 52430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 52530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodint usb_device_claim_interface(struct usb_device *device, unsigned int interface) 52630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 52730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return ioctl(device->fd, USBDEVFS_CLAIMINTERFACE, &interface); 52830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 52930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 53030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwoodint usb_device_release_interface(struct usb_device *device, unsigned int interface) 53130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 53230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return ioctl(device->fd, USBDEVFS_RELEASEINTERFACE, &interface); 53330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 53430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 535ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwoodint usb_device_connect_kernel_driver(struct usb_device *device, 536ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood unsigned int interface, int connect) 537ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood{ 538ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood struct usbdevfs_ioctl ctl; 539ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood 540ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood ctl.ifno = interface; 541ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood ctl.ioctl_code = (connect ? USBDEVFS_CONNECT : USBDEVFS_DISCONNECT); 542ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood ctl.data = NULL; 543ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood return ioctl(device->fd, USBDEVFS_IOCTL, &ctl); 544ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood} 545ec9e7b1c1844e66c39a4f63ded8208c1717380f8Mike Lockwood 546120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwoodint usb_device_control_transfer(struct usb_device *device, 547120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int requestType, 548120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int request, 549120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int value, 550120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int index, 551120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood void* buffer, 552120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int length, 553120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood unsigned int timeout) 554120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood{ 555120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood struct usbdevfs_ctrltransfer ctrl; 556120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 557120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood // this usually requires read/write permission 558120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood if (!usb_device_reopen_writeable(device)) 559120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood return -1; 560120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 561120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood memset(&ctrl, 0, sizeof(ctrl)); 562120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.bRequestType = requestType; 563120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.bRequest = request; 564120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.wValue = value; 565120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.wIndex = index; 566120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.wLength = length; 567120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.data = buffer; 568120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.timeout = timeout; 569120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood return ioctl(device->fd, USBDEVFS_CONTROL, &ctrl); 570120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood} 571120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 572120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwoodint usb_device_bulk_transfer(struct usb_device *device, 573120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int endpoint, 574120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood void* buffer, 575120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood int length, 576120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood unsigned int timeout) 577120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood{ 578120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood struct usbdevfs_bulktransfer ctrl; 579120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 580c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood // need to limit request size to avoid EINVAL 581c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood if (length > MAX_USBFS_BUFFER_SIZE) 582c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood length = MAX_USBFS_BUFFER_SIZE; 583c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood 584120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood memset(&ctrl, 0, sizeof(ctrl)); 585120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.ep = endpoint; 586120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.len = length; 587120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.data = buffer; 588120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood ctrl.timeout = timeout; 589120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood return ioctl(device->fd, USBDEVFS_BULK, &ctrl); 590120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood} 591120b57a3d9703bccba534af335aa94dd3a41be2fMike Lockwood 592e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodstruct usb_request *usb_request_new(struct usb_device *dev, 593e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood const struct usb_endpoint_descriptor *ep_desc) 59430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 595e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = calloc(1, sizeof(struct usbdevfs_urb)); 596e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood if (!urb) 597e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 598e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 599e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) 600e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->type = USBDEVFS_URB_TYPE_BULK; 601e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood else if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) 602e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->type = USBDEVFS_URB_TYPE_INTERRUPT; 603e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood else { 604e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood D("Unsupported endpoint type %d", ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); 605e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(urb); 606e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 607e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood } 608e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->endpoint = ep_desc->bEndpointAddress; 609e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 610e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usb_request *req = calloc(1, sizeof(struct usb_request)); 611e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood if (!req) { 612e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(urb); 613e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 614e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood } 615e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 616e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->dev = dev; 617e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->max_packet_size = __le16_to_cpu(ep_desc->wMaxPacketSize); 618e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->private_data = urb; 619b5d68a3c28d0b7a947373344cbda2a2369d0b67dMike Lockwood req->endpoint = urb->endpoint; 620e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->usercontext = req; 621e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood 622e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return req; 62330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 62430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 625e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodvoid usb_request_free(struct usb_request *req) 62630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 627e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(req->private_data); 628e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood free(req); 62930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 63030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 631e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodint usb_request_queue(struct usb_request *req) 63230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 633e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = (struct usbdevfs_urb*)req->private_data; 63430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood int res; 63530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 63630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood urb->status = -1; 637e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb->buffer = req->buffer; 638c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood // need to limit request size to avoid EINVAL 639c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood if (req->buffer_length > MAX_USBFS_BUFFER_SIZE) 640c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood urb->buffer_length = MAX_USBFS_BUFFER_SIZE; 641c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood else 642c4c00d8e6a215020be87f6702844267e105e1f0eMike Lockwood urb->buffer_length = req->buffer_length; 64330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 64430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood do { 645e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood res = ioctl(req->dev->fd, USBDEVFS_SUBMITURB, urb); 64630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } while((res < 0) && (errno == EINTR)); 64730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 64830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood return res; 64930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 65030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 651e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodstruct usb_request *usb_request_wait(struct usb_device *dev) 65230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 653e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = NULL; 654e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usb_request *req = NULL; 65530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 65630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood while (1) { 657e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood int res = ioctl(dev->fd, USBDEVFS_REAPURB, &urb); 65830ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("USBDEVFS_REAPURB returned %d\n", res); 65930ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if (res < 0) { 66030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood if(errno == EINTR) { 66130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood continue; 66230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 66330ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("[ reap urb - error ]\n"); 664e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return NULL; 66530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } else { 66630ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood D("[ urb @%p status = %d, actual = %d ]\n", 667e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood urb, urb->status, urb->actual_length); 668e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req = (struct usb_request*)urb->usercontext; 669e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood req->actual_length = urb->actual_length; 67030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 67130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood break; 67230ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood } 673e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return req; 67430ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 67530ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 676e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwoodint usb_request_cancel(struct usb_request *req) 67730ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood{ 678e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood struct usbdevfs_urb *urb = ((struct usbdevfs_urb*)req->private_data); 679e533c5f1005e8913f577d2aeac5a26f88f55a249Mike Lockwood return ioctl(req->dev->fd, USBDEVFS_DISCARDURB, &urb); 68030ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood} 68130ff2c70ce05d761e8cb0ab7ee02b39a681fe0cbMike Lockwood 682