1 /* 2 * Copyright (C) 2015 Karol Kosik <karo9@interia.eu> 3 * 2015 Samsung Electronics 4 * Author: Igor Kotrasinski <i.kotrasinsk@samsung.com> 5 * 6 * Based on tools/usb/usbip/libsrc/usbip_host_driver.c, which is: 7 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com> 8 * 2005-2007 Takahiro Hirofuchi 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program. If not, see <http://www.gnu.org/licenses/>. 22 */ 23 24 #include <fcntl.h> 25 #include <string.h> 26 #include <linux/usb/ch9.h> 27 28 #include <unistd.h> 29 30 #include "usbip_host_common.h" 31 #include "usbip_device_driver.h" 32 33 #undef PROGNAME 34 #define PROGNAME "libusbip" 35 36 #define copy_descr_attr16(dev, descr, attr) \ 37 ((dev)->attr = le16toh((descr)->attr)) \ 38 39 #define copy_descr_attr(dev, descr, attr) \ 40 ((dev)->attr = (descr)->attr) \ 41 42 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) 43 44 static struct { 45 enum usb_device_speed speed; 46 const char *name; 47 } speed_names[] = { 48 { 49 .speed = USB_SPEED_UNKNOWN, 50 .name = "UNKNOWN", 51 }, 52 { 53 .speed = USB_SPEED_LOW, 54 .name = "low-speed", 55 }, 56 { 57 .speed = USB_SPEED_FULL, 58 .name = "full-speed", 59 }, 60 { 61 .speed = USB_SPEED_HIGH, 62 .name = "high-speed", 63 }, 64 { 65 .speed = USB_SPEED_WIRELESS, 66 .name = "wireless", 67 }, 68 { 69 .speed = USB_SPEED_SUPER, 70 .name = "super-speed", 71 }, 72 }; 73 74 static 75 int read_usb_vudc_device(struct udev_device *sdev, struct usbip_usb_device *dev) 76 { 77 const char *path, *name; 78 char filepath[SYSFS_PATH_MAX]; 79 struct usb_device_descriptor descr; 80 unsigned int i; 81 FILE *fd = NULL; 82 struct udev_device *plat; 83 const char *speed; 84 int ret = 0; 85 86 plat = udev_device_get_parent(sdev); 87 path = udev_device_get_syspath(plat); 88 snprintf(filepath, SYSFS_PATH_MAX, "%s/%s", 89 path, VUDC_DEVICE_DESCR_FILE); 90 fd = fopen(filepath, "r"); 91 if (!fd) 92 return -1; 93 ret = fread((char *) &descr, sizeof(descr), 1, fd); 94 if (ret < 0) 95 goto err; 96 fclose(fd); 97 98 copy_descr_attr(dev, &descr, bDeviceClass); 99 copy_descr_attr(dev, &descr, bDeviceSubClass); 100 copy_descr_attr(dev, &descr, bDeviceProtocol); 101 copy_descr_attr(dev, &descr, bNumConfigurations); 102 copy_descr_attr16(dev, &descr, idVendor); 103 copy_descr_attr16(dev, &descr, idProduct); 104 copy_descr_attr16(dev, &descr, bcdDevice); 105 106 strncpy(dev->path, path, SYSFS_PATH_MAX); 107 108 dev->speed = USB_SPEED_UNKNOWN; 109 speed = udev_device_get_sysattr_value(sdev, "current_speed"); 110 if (speed) { 111 for (i = 0; i < ARRAY_SIZE(speed_names); i++) { 112 if (!strcmp(speed_names[i].name, speed)) { 113 dev->speed = speed_names[i].speed; 114 break; 115 } 116 } 117 } 118 119 /* Only used for user output, little sense to output them in general */ 120 dev->bNumInterfaces = 0; 121 dev->bConfigurationValue = 0; 122 dev->busnum = 0; 123 124 name = udev_device_get_sysname(plat); 125 strncpy(dev->busid, name, SYSFS_BUS_ID_SIZE); 126 return 0; 127 err: 128 fclose(fd); 129 return -1; 130 } 131 132 static int is_my_device(struct udev_device *dev) 133 { 134 const char *driver; 135 136 driver = udev_device_get_property_value(dev, "USB_UDC_NAME"); 137 return driver != NULL && !strcmp(driver, USBIP_DEVICE_DRV_NAME); 138 } 139 140 static int usbip_device_driver_open(struct usbip_host_driver *hdriver) 141 { 142 int ret; 143 144 hdriver->ndevs = 0; 145 INIT_LIST_HEAD(&hdriver->edev_list); 146 147 ret = usbip_generic_driver_open(hdriver); 148 if (ret) 149 err("please load " USBIP_CORE_MOD_NAME ".ko and " 150 USBIP_DEVICE_DRV_NAME ".ko!"); 151 152 return ret; 153 } 154 155 struct usbip_host_driver device_driver = { 156 .edev_list = LIST_HEAD_INIT(device_driver.edev_list), 157 .udev_subsystem = "udc", 158 .ops = { 159 .open = usbip_device_driver_open, 160 .close = usbip_generic_driver_close, 161 .refresh_device_list = usbip_generic_refresh_device_list, 162 .get_device = usbip_generic_get_device, 163 .read_device = read_usb_vudc_device, 164 .is_my_device = is_my_device, 165 }, 166 }; 167