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-              r08f747e
+              rdac43be
  */
 /** @file
  * @brief HC driver and hub driver (implementation).
+ * @brief Common stuff for both HC driver and hub driver.
  */
 #include <usb/hcdhubd.h>
 …
 #include <usb/classes/hub.h>
+#define USB_HUB_DEVICE_NAME "usbhub"
+#define USB_KBD_DEVICE_NAME "hid"
+/** List of handled host controllers. */
+static LIST_INITIALIZE(hc_list);
+/** Our HC driver. */
+static usb_hc_driver_t *hc_driver = NULL;
+static usbhc_iface_t usb_interface = {
+        .interrupt_out = NULL,
+        .interrupt_in = NULL
+};
+static device_ops_t usb_device_ops = {
+        .interfaces[USBHC_DEV_IFACE] = &usb_interface
+};
+size_t USB_HUB_MAX_DESCRIPTOR_SIZE = 71;
+uint8_t USB_HUB_DESCRIPTOR_TYPE = 0x29;
+//*********************************************
+//
+//  various utils
+//
+//*********************************************
+void * usb_serialize_hub_descriptor(usb_hub_descriptor_t * descriptor) {
+        //base size
+        size_t size = 7;
+        //variable size according to port count
+        size_t var_size = descriptor->ports_count / 8 + ((descriptor->ports_count % 8 > 0) ? 1 : 0);
+        size += 2 * var_size;
+        uint8_t * result = (uint8_t*) malloc(size);
+        //size
+        result[0] = size;
+        //descriptor type
+        result[1] = USB_DESCTYPE_HUB;
+        result[2] = descriptor->ports_count;
+        /// @fixme handling of endianness??
+        result[3] = descriptor->hub_characteristics / 256;
+        result[4] = descriptor->hub_characteristics % 256;
+        result[5] = descriptor->pwr_on_2_good_time;
+        result[6] = descriptor->current_requirement;
+        size_t i;
+        for (i = 0; i < var_size; ++i) {
+                result[7 + i] = descriptor->devices_removable[i];
+        }
+        for (i = 0; i < var_size; ++i) {
+                result[7 + var_size + i] = 255;
+        }
+        return result;
+}
+usb_hub_descriptor_t * usb_deserialize_hub_desriptor(void * serialized_descriptor) {
+        uint8_t * sdescriptor = (uint8_t*) serialized_descriptor;
+        if (sdescriptor[1] != USB_DESCTYPE_HUB) return NULL;
+        usb_hub_descriptor_t * result = (usb_hub_descriptor_t*) malloc(sizeof (usb_hub_descriptor_t));
+        //uint8_t size = sdescriptor[0];
+        result->ports_count = sdescriptor[2];
+        /// @fixme handling of endianness??
+        result->hub_characteristics = sdescriptor[4] + 256 * sdescriptor[3];
+        result->pwr_on_2_good_time = sdescriptor[5];
+        result->current_requirement = sdescriptor[6];
+        size_t var_size = result->ports_count / 8 + ((result->ports_count % 8 > 0) ? 1 : 0);
+        result->devices_removable = (uint8_t*) malloc(var_size);
+        size_t i;
+        for (i = 0; i < var_size; ++i) {
+                result->devices_removable[i] = sdescriptor[7 + i];
+        }
+        return result;
+}
+//*********************************************
+//
+//  hub driver code
+//
+//*********************************************
+static void set_hub_address(usb_hc_device_t *hc, usb_address_t address);
+usb_hcd_hub_info_t * usb_create_hub_info(device_t * device) {
+        usb_hcd_hub_info_t* result = (usb_hcd_hub_info_t*) malloc(sizeof (usb_hcd_hub_info_t));
+        //get parent device
+        /// @TODO this code is not correct
+        device_t * my_hcd = device;
+        while (my_hcd->parent)
+                my_hcd = my_hcd->parent;
+        //dev->
+        printf("%s: owner hcd found: %s\n", hc_driver->name, my_hcd->name);
+        //we add the hub into the first hc
+        //link_t *link_hc = hc_list.next;
+        //usb_hc_device_t *hc = list_get_instance(link_hc,
+        //              usb_hc_device_t, link);
+        //must get generic device info
+        return result;
+}
+#include "hcdhubd_private.h"
 /** Callback when new device is detected and must be handled by this driver.
+ *
  * @param dev New device.
  * @return Error code.hub added, hurrah!\n"
+ * @return Error code.
  */
 static int add_device(device_t *dev) {
-        /*
-         * FIXME: use some magic to determine whether hub or another HC
-         * was connected.
-         */
         bool is_hc = str_cmp(dev->name, USB_HUB_DEVICE_NAME) != 0;
         printf("%s: add_device(name=\"%s\")\n", hc_driver->name, dev->name);
 …
                  * We are the HC itself.
                  */
+                usb_hc_device_t *hc_dev = malloc(sizeof (usb_hc_device_t));
+                list_initialize(&hc_dev->link);
+                hc_dev->transfer_ops = NULL;
+                hc_dev->generic = dev;
+                dev->ops = &usb_device_ops;
+                hc_dev->generic->driver_data = hc_dev;
+                int rc = hc_driver->add_hc(hc_dev);
+                if (rc != EOK) {
+                        free(hc_dev);
+                        return rc;
+                }
+                return usb_add_hc_device(dev);
+        } else {
                 /*
+                 * FIXME: The following line causes devman to hang.
+                 * Will investigate later why.
+                 */
+                // add_device_to_class(dev, "usbhc");
+                list_append(&hc_dev->link, &hc_list);
+                //add keyboard
+                /// @TODO this is not correct code
+                /*
+                 * Announce presence of child device.
+                 */
+                device_t *kbd = NULL;
+                match_id_t *match_id = NULL;
+                kbd = create_device();
+                if (kbd == NULL) {
+                        printf("ERROR: enomem\n");
+                }
+                kbd->name = USB_KBD_DEVICE_NAME;
+                match_id = create_match_id();
+                if (match_id == NULL) {
+                        printf("ERROR: enomem\n");
+                }
+                char *id;
+                rc = asprintf(&id, USB_KBD_DEVICE_NAME);
+                if (rc <= 0) {
+                        printf("ERROR: enomem\n");
+                        return rc;
+                }
+                match_id->id = id;
+                match_id->score = 30;
+                add_match_id(&kbd->match_ids, match_id);
+                rc = child_device_register(kbd, dev);
+                if (rc != EOK) {
+                        printf("ERROR: cannot register kbd\n");
+                        return rc;
+                }
+                printf("%s: registered root hub\n", dev->name);
+                return EOK;
+        } else {
+                usb_hc_device_t *hc = list_get_instance(hc_list.next, usb_hc_device_t, link);
+                set_hub_address(hc, 5);
+                /*
+                 * We are some (probably deeply nested) hub.
+                 * We are some (maybe deeply nested) hub.
                  * Thus, assign our own operations and explore already
                  * connected devices.
                  */
+                //insert hub into list
+                //find owner hcd
+                device_t * my_hcd = dev;
+                while (my_hcd->parent)
+                        my_hcd = my_hcd->parent;
+                //dev->
+                printf("%s: owner hcd found: %s\n", hc_driver->name, my_hcd->name);
+                my_hcd = dev;
+                while (my_hcd->parent)
+                        my_hcd = my_hcd->parent;
+                //dev->
+                printf("%s: owner hcd found: %s\n", hc_driver->name, my_hcd->name);
+                //create the hub structure
+                usb_hcd_hub_info_t * hub_info = usb_create_hub_info(dev);
+                //append into the list
+                //we add the hub into the first hc
+                list_append(&hub_info->link, &hc->hubs);
+                return EOK;
+                //return ENOTSUP;
+        }
+}
+/** Sample usage of usb_hc_async functions.
+ * This function sets hub address using standard SET_ADDRESS request.
+ *
+ * @warning This function shall be removed once you are familiar with
+ * the usb_hc_ API.
+ *
+ * @param hc Host controller the hub belongs to.
+ * @param address New hub address.
+ */
+static void set_hub_address(usb_hc_device_t *hc, usb_address_t address) {
+        printf("%s: setting hub address to %d\n", hc->generic->name, address);
+        usb_target_t target = {0, 0};
+        usb_handle_t handle;
+        int rc;
+        usb_device_request_setup_packet_t setup_packet = {
+                .request_type = 0,
+                .request = USB_DEVREQ_SET_ADDRESS,
+                .index = 0,
+                .length = 0,
+        };
+        setup_packet.value = address;
+        rc = usb_hc_async_control_write_setup(hc, target,
+                        &setup_packet, sizeof (setup_packet), &handle);
+        if (rc != EOK) {
+                return;
+        }
+        rc = usb_hc_async_wait_for(handle);
+        if (rc != EOK) {
+                return;
+        }
+        rc = usb_hc_async_control_write_status(hc, target, &handle);
+        if (rc != EOK) {
+                return;
+        }
+        rc = usb_hc_async_wait_for(handle);
+        if (rc != EOK) {
+                return;
+        }
+        printf("%s: hub address changed\n", hc->generic->name);
+}
+/** Check changes on all known hubs.
+ */
+static void check_hub_changes(void) {
+        /*
+         * Iterate through all HCs.
+         */
+        link_t *link_hc;
+        for (link_hc = hc_list.next;
+                        link_hc != &hc_list;
+                        link_hc = link_hc->next) {
+                usb_hc_device_t *hc = list_get_instance(link_hc,
+                                usb_hc_device_t, link);
+                /*
+                 * Iterate through all their hubs.
+                 */
+                link_t *link_hub;
+                for (link_hub = hc->hubs.next;
+                                link_hub != &hc->hubs;
+                                link_hub = link_hub->next) {
+                        usb_hcd_hub_info_t *hub = list_get_instance(link_hub,
+                                        usb_hcd_hub_info_t, link);
+                        /*
+                         * Check status change pipe of this hub.
+                         */
+                        usb_target_t target = {
+                                .address = hub->device->address,
+                                .endpoint = 1
+                        };
+                        // FIXME: count properly
+                        size_t byte_length = (hub->port_count / 8) + 1;
+                        void *change_bitmap = malloc(byte_length);
+                        size_t actual_size;
+                        usb_handle_t handle;
+                        /*
+                         * Send the request.
+                         * FIXME: check returned value for possible errors
+                         */
+                        usb_hc_async_interrupt_in(hc, target,
+                                        change_bitmap, byte_length, &actual_size,
+                                        &handle);
+                        usb_hc_async_wait_for(handle);
+                        /*
+                         * TODO: handle the changes.
+                         */
+                }
+                return usb_add_hub_device(dev);
+        }
+}
 …
         hc_driver = hc;
         hc_driver_generic.name = hc->name;
-        /*
-         * Launch here fibril that will periodically check all
-         * attached hubs for status change.
-         * WARN: This call will effectively do nothing.
-         */
-        check_hub_changes();
         /*

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