Changeset 0748854 in mainline for uspace/drv/usbhub/usbhub.c


Ignore:
Timestamp:
2011-04-09T23:30:55Z (13 years ago)
Author:
Vojtech Horky <vojtechhorky@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
46e078a
Parents:
77223f8 (diff), f11c288 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Merge development/ changes

File:
1 edited

Legend:

Unmodified
Added
Removed
  • uspace/drv/usbhub/usbhub.c

    r77223f8 r0748854  
    3737#include <errno.h>
    3838#include <str_error.h>
     39#include <inttypes.h>
    3940
    4041#include <usb_iface.h>
     
    5354#include "usb/classes/classes.h"
    5455
    55 static int usb_hub_trigger_connecting_non_removable_devices(
    56                 usb_hub_info_t * hub, usb_hub_descriptor_t * descriptor);
    57 
     56
     57static usb_hub_info_t * usb_hub_info_create(usb_device_t * usb_dev);
     58
     59static int usb_hub_process_hub_specific_info(usb_hub_info_t * hub_info);
     60
     61static int usb_hub_set_configuration(usb_hub_info_t * hub_info);
     62
     63static int usb_hub_start_hub_fibril(usb_hub_info_t * hub_info);
     64
     65static int usb_process_hub_over_current(usb_hub_info_t * hub_info,
     66    usb_hub_status_t status);
     67
     68static int usb_process_hub_power_change(usb_hub_info_t * hub_info,
     69    usb_hub_status_t status);
     70
     71static void usb_hub_process_global_interrupt(usb_hub_info_t * hub_info);
     72
     73
     74/// \TODO malloc checking
    5875
    5976//*********************************************
    6077//
    6178//  hub driver code, initialization
     79//
     80//*********************************************
     81
     82/**
     83 * Initialize hub device driver fibril
     84 *
     85 * Creates hub representation and fibril that periodically checks hub`s status.
     86 * Hub representation is passed to the fibril.
     87 * @param usb_dev generic usb device information
     88 * @return error code
     89 */
     90int usb_hub_add_device(usb_device_t * usb_dev) {
     91        if (!usb_dev) return EINVAL;
     92        usb_hub_info_t * hub_info = usb_hub_info_create(usb_dev);
     93        //create hc connection
     94        usb_log_debug("Initializing USB wire abstraction.\n");
     95        int opResult = usb_hc_connection_initialize_from_device(
     96            &hub_info->connection,
     97            hub_info->usb_device->ddf_dev);
     98        if (opResult != EOK) {
     99                usb_log_error("could not initialize connection to device, "
     100                    "errno %d\n",
     101                    opResult);
     102                free(hub_info);
     103                return opResult;
     104        }
     105
     106        usb_pipe_start_session(hub_info->control_pipe);
     107        //set hub configuration
     108        opResult = usb_hub_set_configuration(hub_info);
     109        if (opResult != EOK) {
     110                usb_log_error("could not set hub configuration, errno %d\n",
     111                    opResult);
     112                free(hub_info);
     113                return opResult;
     114        }
     115        //get port count and create attached_devs
     116        opResult = usb_hub_process_hub_specific_info(hub_info);
     117        if (opResult != EOK) {
     118                usb_log_error("could process hub specific info, errno %d\n",
     119                    opResult);
     120                free(hub_info);
     121                return opResult;
     122        }
     123        usb_pipe_end_session(hub_info->control_pipe);
     124
     125        /// \TODO what is this?
     126        usb_log_debug("Creating `hub' function.\n");
     127        ddf_fun_t *hub_fun = ddf_fun_create(hub_info->usb_device->ddf_dev,
     128            fun_exposed, "hub");
     129        assert(hub_fun != NULL);
     130        hub_fun->ops = NULL;
     131
     132        opResult = ddf_fun_bind(hub_fun);
     133        assert(opResult == EOK);
     134        opResult = ddf_fun_add_to_class(hub_fun, "hub");
     135        assert(opResult == EOK);
     136
     137        opResult = usb_hub_start_hub_fibril(hub_info);
     138        if(opResult!=EOK)
     139                free(hub_info);
     140        return opResult;
     141}
     142
     143
     144/** Callback for polling hub for changes.
     145 *
     146 * @param dev Device where the change occured.
     147 * @param change_bitmap Bitmap of changed ports.
     148 * @param change_bitmap_size Size of the bitmap in bytes.
     149 * @param arg Custom argument, points to @c usb_hub_info_t.
     150 * @return Whether to continue polling.
     151 */
     152bool hub_port_changes_callback(usb_device_t *dev,
     153    uint8_t *change_bitmap, size_t change_bitmap_size, void *arg) {
     154        usb_hub_info_t *hub = (usb_hub_info_t *) arg;
     155
     156        /* FIXME: check that we received enough bytes. */
     157        if (change_bitmap_size == 0) {
     158                goto leave;
     159        }
     160
     161        bool change;
     162        change = ((uint8_t*) change_bitmap)[0] & 1;
     163        if (change) {
     164                usb_hub_process_global_interrupt(hub);
     165        }
     166
     167        size_t port;
     168        for (port = 1; port < hub->port_count + 1; port++) {
     169                bool change = (change_bitmap[port / 8] >> (port % 8)) % 2;
     170                if (change) {
     171                        usb_hub_process_interrupt(hub, port);
     172                }
     173        }
     174leave:
     175        /* FIXME: proper interval. */
     176        async_usleep(1000 * 1000 * 10);
     177
     178        return true;
     179}
     180
     181/**
     182 * release default address used by given hub
     183 *
     184 * Also unsets hub->is_default_address_used. Convenience wrapper function.
     185 * @note hub->connection MUST be open for communication
     186 * @param hub hub representation
     187 * @return error code
     188 */
     189int usb_hub_release_default_address(usb_hub_info_t * hub) {
     190        int opResult = usb_hc_release_default_address(&hub->connection);
     191        if (opResult != EOK) {
     192                usb_log_error("could not release default address, errno %d\n",
     193                    opResult);
     194                return opResult;
     195        }
     196        hub->is_default_address_used = false;
     197        return EOK;
     198}
     199
     200
     201//*********************************************
     202//
     203//  support functions
    62204//
    63205//*********************************************
     
    71213 */
    72214static usb_hub_info_t * usb_hub_info_create(usb_device_t * usb_dev) {
    73         usb_hub_info_t * result = usb_new(usb_hub_info_t);
    74         if(!result) return NULL;
     215        usb_hub_info_t * result = malloc(sizeof(usb_hub_info_t));
     216        if (!result) return NULL;
    75217        result->usb_device = usb_dev;
    76218        result->status_change_pipe = usb_dev->pipes[0].pipe;
     
    90232 * @return error code
    91233 */
    92 static int usb_hub_process_hub_specific_info(usb_hub_info_t * hub_info){
     234static int usb_hub_process_hub_specific_info(usb_hub_info_t * hub_info) {
    93235        // get hub descriptor
    94236        usb_log_debug("creating serialized descriptor\n");
    95237        void * serialized_descriptor = malloc(USB_HUB_MAX_DESCRIPTOR_SIZE);
    96238        usb_hub_descriptor_t * descriptor;
    97 
    98         /* this was one fix of some bug, should not be needed anymore
    99          * these lines allow to reset hub once more, it can be used as
    100          * brute-force initialization for non-removable devices
    101         int opResult = usb_request_set_configuration(&result->endpoints.control, 1);
    102         if(opResult!=EOK){
    103                 usb_log_error("could not set default configuration, errno %d",opResult);
    104                 return opResult;
    105         }
    106          */
     239        int opResult;
     240
    107241        size_t received_size;
    108         int opResult = usb_request_get_descriptor(&hub_info->usb_device->ctrl_pipe,
    109                         USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_DEVICE,
    110                         USB_DESCTYPE_HUB,
    111                         0, 0, serialized_descriptor,
    112                         USB_HUB_MAX_DESCRIPTOR_SIZE, &received_size);
    113 
    114         if (opResult != EOK) {
    115                 usb_log_error("failed when receiving hub descriptor, badcode = %d\n",
    116                                 opResult);
     242        opResult = usb_request_get_descriptor(hub_info->control_pipe,
     243            USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_DEVICE,
     244            USB_DESCTYPE_HUB, 0, 0, serialized_descriptor,
     245            USB_HUB_MAX_DESCRIPTOR_SIZE, &received_size);
     246
     247        if (opResult != EOK) {
     248                usb_log_error("failed when receiving hub descriptor, "
     249                    "badcode = %d\n",
     250                    opResult);
    117251                free(serialized_descriptor);
    118252                return opResult;
     
    120254        usb_log_debug2("deserializing descriptor\n");
    121255        descriptor = usb_deserialize_hub_desriptor(serialized_descriptor);
    122         if(descriptor==NULL){
     256        if (descriptor == NULL) {
    123257                usb_log_warning("could not deserialize descriptor \n");
    124258                return opResult;
    125259        }
    126         usb_log_debug("setting port count to %d\n",descriptor->ports_count);
     260        usb_log_debug("setting port count to %d\n", descriptor->ports_count);
    127261        hub_info->port_count = descriptor->ports_count;
    128         hub_info->ports = malloc(sizeof(usb_hub_port_t) * (hub_info->port_count+1));
     262        /// \TODO this is not semantically correct
     263        hub_info->ports = malloc(
     264            sizeof (usb_hub_port_t) * (hub_info->port_count + 1));
    129265        size_t port;
    130266        for (port = 0; port < hub_info->port_count + 1; port++) {
    131267                usb_hub_port_init(&hub_info->ports[port]);
    132268        }
    133         //handle non-removable devices
    134         usb_hub_trigger_connecting_non_removable_devices(hub_info, descriptor);
    135269        usb_log_debug2("freeing data\n");
    136270        free(serialized_descriptor);
     
    139273        return EOK;
    140274}
     275
    141276/**
    142277 * Set configuration of hub
     
    147282 * @return error code
    148283 */
    149 static int usb_hub_set_configuration(usb_hub_info_t * hub_info){
     284static int usb_hub_set_configuration(usb_hub_info_t * hub_info) {
    150285        //device descriptor
    151286        usb_standard_device_descriptor_t *std_descriptor
     
    153288        usb_log_debug("hub has %d configurations\n",
    154289            std_descriptor->configuration_count);
    155         if(std_descriptor->configuration_count<1){
     290        if (std_descriptor->configuration_count < 1) {
    156291                usb_log_error("there are no configurations available\n");
    157292                return EINVAL;
     
    173308        }
    174309        usb_log_debug("\tused configuration %d\n",
    175                         config_descriptor->configuration_number);
     310            config_descriptor->configuration_number);
    176311
    177312        return EOK;
     
    179314
    180315/**
    181  * Initialize hub device driver fibril
    182  *
    183  * Creates hub representation and fibril that periodically checks hub`s status.
    184  * Hub representation is passed to the fibril.
    185  * @param usb_dev generic usb device information
    186  * @return error code
    187  */
    188 int usb_hub_add_device(usb_device_t * usb_dev){
    189         if(!usb_dev) return EINVAL;
    190         usb_hub_info_t * hub_info = usb_hub_info_create(usb_dev);
    191         //create hc connection
    192         usb_log_debug("Initializing USB wire abstraction.\n");
    193         int opResult = usb_hc_connection_initialize_from_device(
    194                         &hub_info->connection,
    195                         hub_info->usb_device->ddf_dev);
    196         if(opResult != EOK){
    197                 usb_log_error("could not initialize connection to device, errno %d\n",
    198                                 opResult);
    199                 free(hub_info);
    200                 return opResult;
    201         }
    202        
    203         usb_pipe_start_session(hub_info->control_pipe);
    204         //set hub configuration
    205         opResult = usb_hub_set_configuration(hub_info);
    206         if(opResult!=EOK){
    207                 usb_log_error("could not set hub configuration, errno %d\n",opResult);
    208                 free(hub_info);
    209                 return opResult;
    210         }
    211         //get port count and create attached_devs
    212         opResult = usb_hub_process_hub_specific_info(hub_info);
    213         if(opResult!=EOK){
    214                 usb_log_error("could not set hub configuration, errno %d\n",opResult);
    215                 free(hub_info);
    216                 return opResult;
    217         }
    218         usb_pipe_end_session(hub_info->control_pipe);
    219 
    220 
    221         /// \TODO what is this?
    222         usb_log_debug("Creating `hub' function.\n");
    223         ddf_fun_t *hub_fun = ddf_fun_create(hub_info->usb_device->ddf_dev,
    224                         fun_exposed, "hub");
    225         assert(hub_fun != NULL);
    226         hub_fun->ops = NULL;
    227 
    228         int rc = ddf_fun_bind(hub_fun);
    229         assert(rc == EOK);
    230         rc = ddf_fun_add_to_class(hub_fun, "hub");
    231         assert(rc == EOK);
    232 
     316 * create and start fibril with hub control loop
     317 *
     318 * Before the fibril is started, the control pipe and host controller
     319 * connection of the hub is open.
     320 *
     321 * @param hub_info hub representing structure
     322 * @return error code
     323 */
     324static int usb_hub_start_hub_fibril(usb_hub_info_t * hub_info){
    233325        /*
    234326         * The processing will require opened control pipe and connection
     
    239331         * auto destruction, this could work better.
    240332         */
    241         rc = usb_pipe_start_session(&usb_dev->ctrl_pipe);
     333        int rc = usb_pipe_start_session(hub_info->control_pipe);
    242334        if (rc != EOK) {
    243335                usb_log_error("Failed to start session on control pipe: %s.\n",
    244336                    str_error(rc));
    245                 goto leave;
     337                return rc;
    246338        }
    247339        rc = usb_hc_connection_open(&hub_info->connection);
    248340        if (rc != EOK) {
    249                 usb_pipe_end_session(&usb_dev->ctrl_pipe);
     341                usb_pipe_end_session(hub_info->control_pipe);
    250342                usb_log_error("Failed to open connection to HC: %s.\n",
    251343                    str_error(rc));
    252                 goto leave;
     344                return rc;
    253345        }
    254346
    255347        rc = usb_device_auto_poll(hub_info->usb_device, 0,
    256             hub_port_changes_callback, ((hub_info->port_count+1) / 8) + 1,
     348            hub_port_changes_callback, ((hub_info->port_count + 1) / 8) + 1,
    257349            NULL, hub_info);
    258350        if (rc != EOK) {
     
    266358            hub_info->usb_device->ddf_dev->name, hub_info->port_count);
    267359        return EOK;
    268 
    269 leave:
    270         free(hub_info);
    271 
    272         return rc;
    273 }
    274 
    275 
    276 //*********************************************
    277 //
    278 //  hub driver code, main loop and port handling
    279 //
    280 //*********************************************
    281 
    282 /**
    283  * triggers actions to connect non0removable devices
    284  *
    285  * This will trigger operations leading to activated non-removable device.
    286  * Control pipe of the hub must be open fo communication.
    287  * @param hub hub representation
    288  * @param descriptor usb hub descriptor
    289  * @return error code
    290  */
    291 static int usb_hub_trigger_connecting_non_removable_devices(usb_hub_info_t * hub,
    292                 usb_hub_descriptor_t * descriptor)
    293 {
    294         usb_log_info("attaching non-removable devices(if any)\n");
    295         usb_device_request_setup_packet_t request;
     360}
     361
     362//*********************************************
     363//
     364//  change handling functions
     365//
     366//*********************************************
     367
     368
     369/**
     370 * process hub over current change
     371 *
     372 * This means either to power off the hub or power it on.
     373 * @param hub_info hub instance
     374 * @param status hub status bitmask
     375 * @return error code
     376 */
     377static int usb_process_hub_over_current(usb_hub_info_t * hub_info,
     378    usb_hub_status_t status) {
    296379        int opResult;
    297         size_t rcvd_size;
    298         usb_port_status_t status;
    299         uint8_t * non_removable_dev_bitmap = descriptor->devices_removable;
    300         int port;
    301         for(port=1;port<=descriptor->ports_count;++port){
    302                 bool is_non_removable =
    303                                 ((non_removable_dev_bitmap[port/8]) >> (port%8)) %2;
    304                 if(is_non_removable){
    305                         usb_log_debug("non-removable device on port %d\n",port);
    306                         usb_hub_set_port_status_request(&request, port);
    307                         opResult = usb_pipe_control_read(
    308                                         hub->control_pipe,
    309                                         &request, sizeof(usb_device_request_setup_packet_t),
    310                                         &status, 4, &rcvd_size
    311                                         );
     380        if (usb_hub_is_status(status,USB_HUB_FEATURE_HUB_OVER_CURRENT)){
     381                opResult = usb_hub_clear_feature(hub_info->control_pipe,
     382                    USB_HUB_FEATURE_HUB_LOCAL_POWER);
     383                if (opResult != EOK) {
     384                        usb_log_error("cannot power off hub: %d\n",
     385                            opResult);
     386                }
     387        } else {
     388                opResult = usb_hub_set_feature(hub_info->control_pipe,
     389                    USB_HUB_FEATURE_HUB_LOCAL_POWER);
     390                if (opResult != EOK) {
     391                        usb_log_error("cannot power on hub: %d\n",
     392                            opResult);
     393                }
     394        }
     395        return opResult;
     396}
     397
     398/**
     399 * process hub power change
     400 *
     401 * If the power has been lost, reestablish it.
     402 * If it was reestablished, re-power all ports.
     403 * @param hub_info hub instance
     404 * @param status hub status bitmask
     405 * @return error code
     406 */
     407static int usb_process_hub_power_change(usb_hub_info_t * hub_info,
     408    usb_hub_status_t status) {
     409        int opResult;
     410        if (usb_hub_is_status(status,USB_HUB_FEATURE_HUB_LOCAL_POWER)) {
     411                //restart power on hub
     412                opResult = usb_hub_set_feature(hub_info->control_pipe,
     413                    USB_HUB_FEATURE_HUB_LOCAL_POWER);
     414                if (opResult != EOK) {
     415                        usb_log_error("cannot power on hub: %d\n",
     416                            opResult);
     417                }
     418        } else {//power reestablished on hub- restart ports
     419                size_t port;
     420                for (port = 0; port < hub_info->port_count; ++port) {
     421                        opResult = usb_hub_set_port_feature(
     422                            hub_info->control_pipe,
     423                            port, USB_HUB_FEATURE_PORT_POWER);
    312424                        if (opResult != EOK) {
    313                                 usb_log_error("could not get port status of port %d errno:%d\n",
    314                                                 port, opResult);
    315                                 return opResult;
    316                         }
    317                         //set the status change bit, so it will be noticed in driver loop
    318                         if(usb_port_dev_connected(&status)){
    319                                 usb_hub_set_disable_port_feature_request(&request, port,
    320                                                 USB_HUB_FEATURE_PORT_CONNECTION);
    321                                 opResult = usb_pipe_control_read(
    322                                                 hub->control_pipe,
    323                                                 &request, sizeof(usb_device_request_setup_packet_t),
    324                                                 &status, 4, &rcvd_size
    325                                                 );
    326                                 if (opResult != EOK) {
    327                                         usb_log_warning(
    328                                                         "could not clear port connection on port %d errno:%d\n",
    329                                                         port, opResult);
    330                                 }
    331                                 usb_log_debug("cleared port connection\n");
    332                                 usb_hub_set_enable_port_feature_request(&request, port,
    333                                                 USB_HUB_FEATURE_PORT_ENABLE);
    334                                 opResult = usb_pipe_control_read(
    335                                                 hub->control_pipe,
    336                                                 &request, sizeof(usb_device_request_setup_packet_t),
    337                                                 &status, 4, &rcvd_size
    338                                                 );
    339                                 if (opResult != EOK) {
    340                                         usb_log_warning(
    341                                                         "could not set port enabled on port %d errno:%d\n",
    342                                                         port, opResult);
    343                                 }
    344                                 usb_log_debug("port set to enabled - should lead to connection change\n");
     425                                usb_log_error("cannot power on port %d;  %d\n",
     426                                    port, opResult);
    345427                        }
    346428                }
    347429        }
    348         /// \TODO this is just a debug code
    349         for(port=1;port<=descriptor->ports_count;++port){
    350                 bool is_non_removable =
    351                                 ((non_removable_dev_bitmap[port/8]) >> (port%8)) %2;
    352                 if(is_non_removable){
    353                         usb_log_debug("port %d is non-removable\n",port);
    354                         usb_port_status_t status;
    355                         size_t rcvd_size;
    356                         usb_device_request_setup_packet_t request;
    357                         //int opResult;
    358                         usb_hub_set_port_status_request(&request, port);
    359                         //endpoint 0
    360                         opResult = usb_pipe_control_read(
    361                                         hub->control_pipe,
    362                                         &request, sizeof(usb_device_request_setup_packet_t),
    363                                         &status, 4, &rcvd_size
    364                                         );
    365                         if (opResult != EOK) {
    366                                 usb_log_error("could not get port status %d\n",opResult);
    367                         }
    368                         if (rcvd_size != sizeof (usb_port_status_t)) {
    369                                 usb_log_error("received status has incorrect size\n");
    370                         }
    371                         //something connected/disconnected
    372                         if (usb_port_connect_change(&status)) {
    373                                 usb_log_debug("some connection changed\n");
    374                         }
    375                         usb_log_debug("status: %s\n",usb_debug_str_buffer(
    376                                         (uint8_t *)&status,4,4));
    377                 }
    378         }
    379         return EOK;
    380 }
    381 
    382 
    383 /**
    384  * release default address used by given hub
    385  *
    386  * Also unsets hub->is_default_address_used. Convenience wrapper function.
    387  * @note hub->connection MUST be open for communication
    388  * @param hub hub representation
    389  * @return error code
    390  */
    391 static int usb_hub_release_default_address(usb_hub_info_t * hub){
    392         int opResult = usb_hc_release_default_address(&hub->connection);
    393         if(opResult!=EOK){
    394                 usb_log_error("could not release default address, errno %d\n",opResult);
    395                 return opResult;
    396         }
    397         hub->is_default_address_used = false;
    398         return EOK;
    399 }
    400 
    401 /**
    402  * routine called when a device on port has been removed
    403  *
    404  * If the device on port had default address, it releases default address.
    405  * Otherwise does not do anything, because DDF does not allow to remove device
    406  * from it`s device tree.
    407  * @param hub hub representation
    408  * @param port port number, starting from 1
    409  */
    410 void usb_hub_removed_device(
    411     usb_hub_info_t * hub,uint16_t port) {
    412 
    413         int opResult = usb_hub_clear_port_feature(hub->control_pipe,
    414                                 port, USB_HUB_FEATURE_C_PORT_CONNECTION);
    415         if(opResult != EOK){
    416                 usb_log_warning("could not clear port-change-connection flag\n");
    417         }
    418         /** \TODO remove device from device manager - not yet implemented in
    419          * devide manager
    420          */
    421        
    422         //close address
    423         if(hub->ports[port].attached_device.address >= 0){
    424                 /*uncomment this code to use it when DDF allows device removal
    425                 opResult = usb_hc_unregister_device(
    426                                 &hub->connection, hub->attached_devs[port].address);
    427                 if(opResult != EOK) {
    428                         dprintf(USB_LOG_LEVEL_WARNING, "could not release address of " \
    429                             "removed device: %d", opResult);
    430                 }
    431                 hub->attached_devs[port].address = 0;
    432                 hub->attached_devs[port].handle = 0;
    433                  */
    434         }else{
    435                 usb_log_warning("this is strange, disconnected device had no address\n");
    436                 //device was disconnected before it`s port was reset - return default address
    437                 usb_hub_release_default_address(hub);
    438         }
    439 }
    440 
    441 
    442 /**
    443  * Process over current condition on port.
    444  *
    445  * Turn off the power on the port.
    446  *
    447  * @param hub hub representation
    448  * @param port port number, starting from 1
    449  */
    450 void usb_hub_over_current( usb_hub_info_t * hub,
    451                 uint16_t port){
     430        return opResult;
     431}
     432
     433/**
     434 * process hub interrupts
     435 *
     436 * The change can be either in the over-current condition or
     437 * local-power lost condition.
     438 * @param hub_info hub instance
     439 */
     440static void usb_hub_process_global_interrupt(usb_hub_info_t * hub_info) {
     441        usb_log_debug("global interrupt on a hub\n");
     442        usb_pipe_t *pipe = hub_info->control_pipe;
    452443        int opResult;
    453         opResult = usb_hub_clear_port_feature(hub->control_pipe,
    454             port, USB_HUB_FEATURE_PORT_POWER);
    455         if(opResult!=EOK){
    456                 usb_log_error("cannot power off port %d;  %d\n",
    457                                 port, opResult);
    458         }
    459 }
    460 
     444
     445        usb_port_status_t status;
     446        size_t rcvd_size;
     447        usb_device_request_setup_packet_t request;
     448        //int opResult;
     449        usb_hub_set_hub_status_request(&request);
     450        //endpoint 0
     451
     452        opResult = usb_pipe_control_read(
     453            pipe,
     454            &request, sizeof (usb_device_request_setup_packet_t),
     455            &status, 4, &rcvd_size
     456            );
     457        if (opResult != EOK) {
     458                usb_log_error("could not get hub status\n");
     459                return;
     460        }
     461        if (rcvd_size != sizeof (usb_port_status_t)) {
     462                usb_log_error("received status has incorrect size\n");
     463                return;
     464        }
     465        //port reset
     466        if (
     467            usb_hub_is_status(status,16+USB_HUB_FEATURE_C_HUB_OVER_CURRENT)) {
     468                usb_process_hub_over_current(hub_info, status);
     469        }
     470        if (
     471            usb_hub_is_status(status,16+USB_HUB_FEATURE_C_HUB_LOCAL_POWER)) {
     472                usb_process_hub_power_change(hub_info, status);
     473        }
     474}
    461475
    462476/**
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