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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>4 * 2015 Samsung Electronics5 * Author: Igor Kotrasinski <i.kotrasinsk@samsung.com>6 *7 * Based on tools/usb/usbip/libsrc/usbip_host_driver.c, which is:8 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>9 * 2005-2007 Takahiro Hirofuchi10 */11 12#include <fcntl.h>13#include <string.h>14#include <linux/usb/ch9.h>15 16#include <unistd.h>17 18#include "usbip_host_common.h"19#include "usbip_device_driver.h"20 21#undef PROGNAME22#define PROGNAME "libusbip"23 24#define copy_descr_attr16(dev, descr, attr) \25 ((dev)->attr = le16toh((descr)->attr)) \26 27#define copy_descr_attr(dev, descr, attr) \28 ((dev)->attr = (descr)->attr) \29 30#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))31 32static struct {33 enum usb_device_speed speed;34 const char *name;35} speed_names[] = {36 {37 .speed = USB_SPEED_UNKNOWN,38 .name = "UNKNOWN",39 },40 {41 .speed = USB_SPEED_LOW,42 .name = "low-speed",43 },44 {45 .speed = USB_SPEED_FULL,46 .name = "full-speed",47 },48 {49 .speed = USB_SPEED_HIGH,50 .name = "high-speed",51 },52 {53 .speed = USB_SPEED_WIRELESS,54 .name = "wireless",55 },56 {57 .speed = USB_SPEED_SUPER,58 .name = "super-speed",59 },60};61 62static63int read_usb_vudc_device(struct udev_device *sdev, struct usbip_usb_device *dev)64{65 const char *path, *name;66 char filepath[SYSFS_PATH_MAX];67 struct usb_device_descriptor descr;68 unsigned int i;69 FILE *fd = NULL;70 struct udev_device *plat;71 const char *speed;72 size_t ret;73 74 plat = udev_device_get_parent(sdev);75 path = udev_device_get_syspath(plat);76 snprintf(filepath, SYSFS_PATH_MAX, "%s/%s",77 path, VUDC_DEVICE_DESCR_FILE);78 fd = fopen(filepath, "r");79 if (!fd)80 return -1;81 ret = fread((char *) &descr, sizeof(descr), 1, fd);82 if (ret != 1) {83 err("Cannot read vudc device descr file: %s", strerror(errno));84 goto err;85 }86 fclose(fd);87 88 copy_descr_attr(dev, &descr, bDeviceClass);89 copy_descr_attr(dev, &descr, bDeviceSubClass);90 copy_descr_attr(dev, &descr, bDeviceProtocol);91 copy_descr_attr(dev, &descr, bNumConfigurations);92 copy_descr_attr16(dev, &descr, idVendor);93 copy_descr_attr16(dev, &descr, idProduct);94 copy_descr_attr16(dev, &descr, bcdDevice);95 96 strncpy(dev->path, path, SYSFS_PATH_MAX - 1);97 dev->path[SYSFS_PATH_MAX - 1] = '\0';98 99 dev->speed = USB_SPEED_UNKNOWN;100 speed = udev_device_get_sysattr_value(sdev, "current_speed");101 if (speed) {102 for (i = 0; i < ARRAY_SIZE(speed_names); i++) {103 if (!strcmp(speed_names[i].name, speed)) {104 dev->speed = speed_names[i].speed;105 break;106 }107 }108 }109 110 /* Only used for user output, little sense to output them in general */111 dev->bNumInterfaces = 0;112 dev->bConfigurationValue = 0;113 dev->busnum = 0;114 115 name = udev_device_get_sysname(plat);116 strncpy(dev->busid, name, SYSFS_BUS_ID_SIZE - 1);117 dev->busid[SYSFS_BUS_ID_SIZE - 1] = '\0';118 return 0;119err:120 fclose(fd);121 return -1;122}123 124static int is_my_device(struct udev_device *dev)125{126 const char *driver;127 128 driver = udev_device_get_property_value(dev, "USB_UDC_NAME");129 return driver != NULL && !strcmp(driver, USBIP_DEVICE_DRV_NAME);130}131 132static int usbip_device_driver_open(struct usbip_host_driver *hdriver)133{134 int ret;135 136 hdriver->ndevs = 0;137 INIT_LIST_HEAD(&hdriver->edev_list);138 139 ret = usbip_generic_driver_open(hdriver);140 if (ret)141 err("please load " USBIP_CORE_MOD_NAME ".ko and "142 USBIP_DEVICE_DRV_NAME ".ko!");143 144 return ret;145}146 147struct usbip_host_driver device_driver = {148 .edev_list = LIST_HEAD_INIT(device_driver.edev_list),149 .udev_subsystem = "udc",150 .ops = {151 .open = usbip_device_driver_open,152 .close = usbip_generic_driver_close,153 .refresh_device_list = usbip_generic_refresh_device_list,154 .get_device = usbip_generic_get_device,155 .read_device = read_usb_vudc_device,156 .is_my_device = is_my_device,157 },158};159