1 files changed, 506 insertions, 0 deletions
diff --git a/drivers/staging/usbip/userspace/libsrc/vhci_driver.c b/drivers/staging/usbip/userspace/libsrc/vhci_driver.c
new file mode 100644
index 000000000000..db43f8d2eb80
--- /dev/null
+++ b/drivers/staging/usbip/userspace/libsrc/vhci_driver.c
@@ -0,0 +1,506 @@
+/*
+ * Copyright (C) 2005-2007 Takahiro Hirofuchi
+ */
+
+
+#include "usbip.h"
+
+
+static const char vhci_driver_name[] = "vhci_hcd";
+
+struct usbip_vhci_driver *vhci_driver;
+
+static struct usbip_imported_device *imported_device_init(struct usbip_imported_device *idev, char *busid)
+{
+	struct sysfs_device *sudev;
+
+	sudev = sysfs_open_device("usb", busid);
+	if (!sudev) {
+		err("sysfs_open_device %s", busid);
+		goto err;
+	}
+	read_usb_device(sudev, &idev->udev);
+	sysfs_close_device(sudev);
+
+	/* add class devices of this imported device */
+	struct class_device *cdev;
+	dlist_for_each_data(vhci_driver->cdev_list, cdev, struct class_device) {
+		if (!strncmp(cdev->devpath, idev->udev.path, strlen(idev->udev.path))) {
+			struct class_device *new_cdev;
+
+			/* alloc and copy because dlist is linked from only one list */
+			new_cdev = calloc(1, sizeof(*new_cdev));
+			if (!new_cdev)
+				goto err;
+
+			memcpy(new_cdev, cdev, sizeof(*new_cdev));
+			dlist_unshift(idev->cdev_list, (void*) new_cdev);
+		}
+	}
+
+	return idev;
+
+err:
+	return NULL;
+}
+
+
+
+static int parse_status(char *value)
+{
+	int ret = 0;
+	char *c;
+
+
+	for (int i = 0; i < vhci_driver->nports; i++)
+		bzero(&vhci_driver->idev[i], sizeof(struct usbip_imported_device));
+
+
+	/* skip a header line */
+	c = strchr(value, '\n') + 1;
+
+	while (*c != '\0') {
+		int port, status, speed, devid;
+		unsigned long socket;
+		char lbusid[SYSFS_BUS_ID_SIZE];
+
+		ret = sscanf(c, "%d %d %d %x %lx %s\n",
+				&port, &status, &speed,
+				&devid, &socket, lbusid);
+
+		if (ret < 5) {
+			err("scanf %d", ret);
+			BUG();
+		}
+
+		dbg("port %d status %d speed %d devid %x",
+				port, status, speed, devid);
+		dbg("socket %lx lbusid %s", socket, lbusid);
+
+
+		/* if a device is connected, look at it */
+		{
+			struct usbip_imported_device *idev = &vhci_driver->idev[port];
+
+			idev->port	= port;
+			idev->status	= status;
+
+			idev->devid	= devid;
+
+			idev->busnum	= (devid >> 16);
+			idev->devnum	= (devid & 0x0000ffff);
+
+			idev->cdev_list = dlist_new(sizeof(struct class_device));
+			if (!idev->cdev_list) {
+				err("init new device");
+				return -1;
+			}
+
+			if (idev->status != VDEV_ST_NULL && idev->status != VDEV_ST_NOTASSIGNED) {
+				idev = imported_device_init(idev, lbusid);
+				if (!idev) {
+					err("init new device");
+					return -1;
+				}
+			}
+		}
+
+
+		/* go to the next line */
+		c = strchr(c, '\n') + 1;
+	}
+
+	dbg("exit");
+
+	return 0;
+}
+
+
+static int check_usbip_device(struct sysfs_class_device *cdev)
+{
+	char clspath[SYSFS_PATH_MAX];	/* /sys/class/video4linux/video0/device     */
+	char devpath[SYSFS_PATH_MAX];	/* /sys/devices/platform/vhci_hcd/usb6/6-1:1.1  */
+
+	int ret;
+
+	snprintf(clspath, sizeof(clspath), "%s/device", cdev->path);
+
+	ret = sysfs_get_link(clspath, devpath, SYSFS_PATH_MAX);
+	if (!ret) {
+		if (!strncmp(devpath, vhci_driver->hc_device->path,
+					strlen(vhci_driver->hc_device->path))) {
+			/* found usbip device */
+			struct class_device *cdev;
+
+			cdev = calloc(1, sizeof(*cdev));
+			if (!cdev) {
+				err("calloc cdev");
+				return -1;
+			}
+			dlist_unshift(vhci_driver->cdev_list, (void*) cdev);
+			strncpy(cdev->clspath, clspath, sizeof(cdev->clspath));
+			strncpy(cdev->devpath, devpath, sizeof(cdev->clspath));
+			dbg("  found %s %s", clspath, devpath);
+		}
+	}
+
+	return 0;
+}
+
+
+static int search_class_for_usbip_device(char *cname)
+{
+	struct sysfs_class *class;
+	struct dlist *cdev_list;
+	struct sysfs_class_device *cdev;
+	int ret = 0;
+
+	class = sysfs_open_class(cname);
+	if (!class) {
+		err("open class");
+		return -1;
+	}
+
+	dbg("class %s", class->name);
+
+	cdev_list = sysfs_get_class_devices(class);
+	if (!cdev_list)
+		/* nothing */
+		goto out;
+
+	dlist_for_each_data(cdev_list, cdev, struct sysfs_class_device) {
+		dbg("   cdev %s", cdev->name);
+		ret = check_usbip_device(cdev);
+		if (ret < 0)
+			goto out;
+	}
+
+out:
+	sysfs_close_class(class);
+
+	return ret;
+}
+
+
+static int refresh_class_device_list(void)
+{
+	int ret;
+	struct dlist *cname_list;
+	char *cname;
+
+	/* search under /sys/class */
+	cname_list = sysfs_open_directory_list("/sys/class");
+	if (!cname_list) {
+		err("open class directory");
+		return -1;
+	}
+
+	dlist_for_each_data(cname_list, cname, char) {
+		ret = search_class_for_usbip_device(cname);
+		if (ret < 0) {
+			sysfs_close_list(cname_list);
+			return -1;
+		}
+	}
+
+	sysfs_close_list(cname_list);
+
+	/* seach under /sys/block */
+	ret = search_class_for_usbip_device(SYSFS_BLOCK_NAME);
+	if (ret < 0)
+		return -1;
+
+	return 0;
+}
+
+
+static int refresh_imported_device_list(void)
+{
+	struct sysfs_attribute *attr_status;
+
+
+	attr_status = sysfs_get_device_attr(vhci_driver->hc_device, "status");
+	if (!attr_status) {
+		err("get attr %s of %s", "status", vhci_driver->hc_device->name);
+		return -1;
+	}
+
+	dbg("name %s, path %s, len %d, method %d\n", attr_status->name,
+			attr_status->path, attr_status->len, attr_status->method);
+
+	dbg("%s", attr_status->value);
+
+	return parse_status(attr_status->value);
+}
+
+static int get_nports(void)
+{
+	int nports = 0;
+	struct sysfs_attribute *attr_status;
+
+	attr_status = sysfs_get_device_attr(vhci_driver->hc_device, "status");
+	if (!attr_status) {
+		err("get attr %s of %s", "status", vhci_driver->hc_device->name);
+		return -1;
+	}
+
+	dbg("name %s, path %s, len %d, method %d\n", attr_status->name,
+			attr_status->path, attr_status->len, attr_status->method);
+
+	dbg("%s", attr_status->value);
+
+	{
+		char *c;
+
+		/* skip a header line */
+		c = strchr(attr_status->value, '\n') + 1;
+
+		while (*c != '\0') {
+			/* go to the next line */
+			c = strchr(c, '\n') + 1;
+			nports += 1;
+		}
+	}
+
+	return nports;
+}
+
+static int get_hc_busid(char *sysfs_mntpath, char *hc_busid)
+{
+        struct sysfs_driver *sdriver;
+        char sdriver_path[SYSFS_PATH_MAX];
+
+	struct sysfs_device *hc_dev;
+	struct dlist *hc_devs;
+
+	int found = 0;
+
+        snprintf(sdriver_path, SYSFS_PATH_MAX, "%s/%s/platform/%s/%s",
+                                sysfs_mntpath, SYSFS_BUS_NAME, SYSFS_DRIVERS_NAME,
+                                vhci_driver_name);
+
+        sdriver = sysfs_open_driver_path(sdriver_path);
+        if (!sdriver) {
+		info("%s is not found", sdriver_path);
+                info("load usbip-core.ko and vhci-hcd.ko !");
+                return -1;
+        }
+
+	hc_devs = sysfs_get_driver_devices(sdriver);
+	if (!hc_devs) {
+		err("get hc list");
+		goto err;
+	}
+
+	/* assume only one vhci_hcd */
+	dlist_for_each_data(hc_devs, hc_dev, struct sysfs_device) {
+		strncpy(hc_busid, hc_dev->bus_id, SYSFS_BUS_ID_SIZE);
+		found = 1;
+	}
+
+err:
+	sysfs_close_driver(sdriver);
+
+	if (found)
+		return 0;
+
+	err("not found usbip hc");
+	return -1;
+}
+
+
+/* ---------------------------------------------------------------------- */
+
+int usbip_vhci_driver_open(void)
+{
+	int ret;
+	char hc_busid[SYSFS_BUS_ID_SIZE];
+
+	vhci_driver = (struct usbip_vhci_driver *) calloc(1, sizeof(*vhci_driver));
+	if (!vhci_driver) {
+		err("alloc vhci_driver");
+		return -1;
+	}
+
+	ret = sysfs_get_mnt_path(vhci_driver->sysfs_mntpath, SYSFS_PATH_MAX);
+	if (ret < 0) {
+		err("sysfs must be mounted");
+		goto err;
+	}
+
+	ret = get_hc_busid(vhci_driver->sysfs_mntpath, hc_busid);
+	if (ret < 0)
+		goto err;
+
+	/* will be freed in usbip_driver_close() */
+	vhci_driver->hc_device = sysfs_open_device("platform", hc_busid);
+	if (!vhci_driver->hc_device) {
+		err("get sysfs vhci_driver");
+		goto err;
+	}
+
+	vhci_driver->nports = get_nports();
+
+	info("%d ports available\n", vhci_driver->nports);
+
+	vhci_driver->cdev_list = dlist_new(sizeof(struct class_device));
+	if (!vhci_driver->cdev_list)
+		goto err;
+
+	if (refresh_class_device_list())
+		goto err;
+
+	if (refresh_imported_device_list())
+		goto err;
+
+
+	return 0;
+
+
+err:
+	if (vhci_driver->cdev_list)
+		dlist_destroy(vhci_driver->cdev_list);
+	if (vhci_driver->hc_device)
+		sysfs_close_device(vhci_driver->hc_device);
+	if (vhci_driver)
+		free(vhci_driver);
+
+	vhci_driver = NULL;
+	return -1;
+}
+
+
+void usbip_vhci_driver_close()
+{
+	if (!vhci_driver)
+		return;
+
+	if (vhci_driver->cdev_list)
+		dlist_destroy(vhci_driver->cdev_list);
+
+	for (int i = 0; i < vhci_driver->nports; i++) {
+		if (vhci_driver->idev[i].cdev_list)
+			dlist_destroy(vhci_driver->idev[i].cdev_list);
+	}
+
+	if (vhci_driver->hc_device)
+		sysfs_close_device(vhci_driver->hc_device);
+	free(vhci_driver);
+
+	vhci_driver = NULL;
+}
+
+
+int usbip_vhci_refresh_device_list(void)
+{
+	if (vhci_driver->cdev_list)
+		dlist_destroy(vhci_driver->cdev_list);
+
+
+	for (int i = 0; i < vhci_driver->nports; i++) {
+		if (vhci_driver->idev[i].cdev_list)
+			dlist_destroy(vhci_driver->idev[i].cdev_list);
+	}
+
+	vhci_driver->cdev_list = dlist_new(sizeof(struct class_device));
+	if (!vhci_driver->cdev_list)
+		goto err;
+
+	if (refresh_class_device_list())
+		goto err;
+
+	if (refresh_imported_device_list())
+		goto err;
+
+	return 0;
+err:
+	if (vhci_driver->cdev_list)
+		dlist_destroy(vhci_driver->cdev_list);
+
+	for (int i = 0; i < vhci_driver->nports; i++) {
+		if (vhci_driver->idev[i].cdev_list)
+			dlist_destroy(vhci_driver->idev[i].cdev_list);
+	}
+
+	err("refresh device list");
+	return -1;
+}
+
+
+int usbip_vhci_get_free_port(void)
+{
+	for (int i = 0; i < vhci_driver->nports; i++) {
+		if (vhci_driver->idev[i].status == VDEV_ST_NULL)
+			return i;
+	}
+
+	return -1;
+}
+
+int usbip_vhci_attach_device2(uint8_t port, int sockfd, uint32_t devid,
+		uint32_t speed) {
+	struct sysfs_attribute *attr_attach;
+	char buff[200]; /* what size should be ? */
+	int ret;
+
+	attr_attach = sysfs_get_device_attr(vhci_driver->hc_device, "attach");
+	if (!attr_attach) {
+		err("get attach");
+		return -1;
+	}
+
+	snprintf(buff, sizeof(buff), "%u %u %u %u",
+			port, sockfd, devid, speed);
+	dbg("writing: %s", buff);
+
+	ret = sysfs_write_attribute(attr_attach, buff, strlen(buff));
+	if (ret < 0) {
+		err("write to attach failed");
+		return -1;
+	}
+
+	info("port %d attached", port);
+
+	return 0;
+}
+
+static unsigned long get_devid(uint8_t busnum, uint8_t devnum)
+{
+	return (busnum << 16) | devnum;
+}
+
+/* will be removed */
+int usbip_vhci_attach_device(uint8_t port, int sockfd, uint8_t busnum,
+		uint8_t devnum, uint32_t speed)
+{
+	int devid = get_devid(busnum, devnum);
+
+	return usbip_vhci_attach_device2(port, sockfd, devid, speed);
+}
+
+int usbip_vhci_detach_device(uint8_t port)
+{
+	struct sysfs_attribute  *attr_detach;
+	char buff[200]; /* what size should be ? */
+	int ret;
+
+	attr_detach = sysfs_get_device_attr(vhci_driver->hc_device, "detach");
+	if (!attr_detach) {
+		err("get detach");
+		return -1;
+	}
+
+	snprintf(buff, sizeof(buff), "%u", port);
+	dbg("writing to detach");
+	dbg("writing: %s", buff);
+
+	ret = sysfs_write_attribute(attr_detach, buff, strlen(buff));
+	if (ret < 0) {
+		err("write to detach failed");
+		return -1;
+	}
+
+	info("port %d detached", port);
+
+	return 0;
+}