159 lines
3.7 KiB
C
159 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
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* 2015 Samsung Electronics
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* Author: Igor Kotrasinski <i.kotrasinsk@samsung.com>
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*
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* Based on tools/usb/usbip/libsrc/usbip_host_driver.c, which is:
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* Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
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* 2005-2007 Takahiro Hirofuchi
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*/
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#include <fcntl.h>
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#include <string.h>
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#include <linux/usb/ch9.h>
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#include <unistd.h>
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#include "usbip_host_common.h"
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#include "usbip_device_driver.h"
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#undef PROGNAME
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#define PROGNAME "libusbip"
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#define copy_descr_attr16(dev, descr, attr) \
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((dev)->attr = le16toh((descr)->attr)) \
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#define copy_descr_attr(dev, descr, attr) \
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((dev)->attr = (descr)->attr) \
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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static struct {
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enum usb_device_speed speed;
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const char *name;
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} speed_names[] = {
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{
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.speed = USB_SPEED_UNKNOWN,
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.name = "UNKNOWN",
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},
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{
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.speed = USB_SPEED_LOW,
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.name = "low-speed",
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},
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{
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.speed = USB_SPEED_FULL,
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.name = "full-speed",
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},
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{
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.speed = USB_SPEED_HIGH,
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.name = "high-speed",
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},
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{
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.speed = USB_SPEED_WIRELESS,
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.name = "wireless",
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},
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{
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.speed = USB_SPEED_SUPER,
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.name = "super-speed",
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},
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};
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static
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int read_usb_vudc_device(struct udev_device *sdev, struct usbip_usb_device *dev)
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{
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const char *path, *name;
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char filepath[SYSFS_PATH_MAX];
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struct usb_device_descriptor descr;
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unsigned int i;
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FILE *fd = NULL;
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struct udev_device *plat;
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const char *speed;
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size_t ret;
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plat = udev_device_get_parent(sdev);
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path = udev_device_get_syspath(plat);
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snprintf(filepath, SYSFS_PATH_MAX, "%s/%s",
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path, VUDC_DEVICE_DESCR_FILE);
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fd = fopen(filepath, "r");
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if (!fd)
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return -1;
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ret = fread((char *) &descr, sizeof(descr), 1, fd);
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if (ret != 1) {
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err("Cannot read vudc device descr file: %s", strerror(errno));
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goto err;
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}
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fclose(fd);
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copy_descr_attr(dev, &descr, bDeviceClass);
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copy_descr_attr(dev, &descr, bDeviceSubClass);
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copy_descr_attr(dev, &descr, bDeviceProtocol);
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copy_descr_attr(dev, &descr, bNumConfigurations);
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copy_descr_attr16(dev, &descr, idVendor);
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copy_descr_attr16(dev, &descr, idProduct);
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copy_descr_attr16(dev, &descr, bcdDevice);
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strncpy(dev->path, path, SYSFS_PATH_MAX - 1);
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dev->path[SYSFS_PATH_MAX - 1] = '\0';
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dev->speed = USB_SPEED_UNKNOWN;
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speed = udev_device_get_sysattr_value(sdev, "current_speed");
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if (speed) {
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for (i = 0; i < ARRAY_SIZE(speed_names); i++) {
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if (!strcmp(speed_names[i].name, speed)) {
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dev->speed = speed_names[i].speed;
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break;
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}
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}
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}
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/* Only used for user output, little sense to output them in general */
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dev->bNumInterfaces = 0;
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dev->bConfigurationValue = 0;
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dev->busnum = 0;
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name = udev_device_get_sysname(plat);
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strncpy(dev->busid, name, SYSFS_BUS_ID_SIZE - 1);
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dev->busid[SYSFS_BUS_ID_SIZE - 1] = '\0';
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return 0;
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err:
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fclose(fd);
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return -1;
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}
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static int is_my_device(struct udev_device *dev)
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{
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const char *driver;
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driver = udev_device_get_property_value(dev, "USB_UDC_NAME");
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return driver != NULL && !strcmp(driver, USBIP_DEVICE_DRV_NAME);
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}
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static int usbip_device_driver_open(struct usbip_host_driver *hdriver)
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{
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int ret;
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hdriver->ndevs = 0;
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INIT_LIST_HEAD(&hdriver->edev_list);
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ret = usbip_generic_driver_open(hdriver);
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if (ret)
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err("please load " USBIP_CORE_MOD_NAME ".ko and "
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USBIP_DEVICE_DRV_NAME ".ko!");
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return ret;
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}
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struct usbip_host_driver device_driver = {
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.edev_list = LIST_HEAD_INIT(device_driver.edev_list),
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.udev_subsystem = "udc",
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.ops = {
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.open = usbip_device_driver_open,
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.close = usbip_generic_driver_close,
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.refresh_device_list = usbip_generic_refresh_device_list,
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.get_device = usbip_generic_get_device,
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.read_device = read_usb_vudc_device,
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.is_my_device = is_my_device,
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},
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};
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