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