source: mainline/uspace/drv/usbhub/usbhub.c@ b2a6fcfe

/*
 * Copyright (c) 2010 Matus Dekanek
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/** @addtogroup usb hub driver
 * @{
 */
/** @file
 * @brief usb hub main functionality
 */

#include <driver.h>
#include <bool.h>
#include <errno.h>

#include <usb_iface.h>
#include <usb/usbdrv.h>
#include <usb/descriptor.h>
#include <usb/devreq.h>
#include <usb/classes/hub.h>

#include "usbhub.h"
#include "usbhub_private.h"
#include "port_status.h"

static usb_iface_t hub_usb_iface = {
        .get_hc_handle = usb_drv_find_hc
};

static device_ops_t hub_device_ops = {
        .interfaces[USB_DEV_IFACE] = &hub_usb_iface
};

//*********************************************
//
//  hub driver code, initialization
//
//*********************************************

usb_hub_info_t * usb_create_hub_info(device_t * device, int hc) {
        usb_hub_info_t* result = usb_new(usb_hub_info_t);
        //result->device = device;
        result->port_count = -1;
        /// \TODO is this correct? is the device stored?
        result->device = device;


        //printf("[usb_hub] phone to hc = %d\n", hc);
        if (hc < 0) {
                return result;
        }
        //get some hub info
        usb_address_t addr = usb_drv_get_my_address(hc, device);
        dprintf(1,"[usb_hub] addres of newly created hub = %d", addr);
        /*if(addr<0){
                //return result;

        }*/

        result->usb_device = usb_new(usb_hcd_attached_device_info_t);
        result->usb_device->address = addr;

        // get hub descriptor
        usb_target_t target;
        target.address = addr;
        target.endpoint = 0;
        usb_device_request_setup_packet_t request;
        //printf("[usb_hub] creating descriptor request\n");
        usb_hub_set_descriptor_request(&request);

        //printf("[usb_hub] creating serialized descriptor\n");
        void * serialized_descriptor = malloc(USB_HUB_MAX_DESCRIPTOR_SIZE);
        usb_hub_descriptor_t * descriptor;
        size_t received_size;
        int opResult;
        //printf("[usb_hub] starting control transaction\n");
        opResult = usb_drv_sync_control_read(
                        hc, target, &request, serialized_descriptor,
                        USB_HUB_MAX_DESCRIPTOR_SIZE, &received_size);
        if (opResult != EOK) {
                dprintf(1,"[usb_hub] failed when receiving hub descriptor, badcode = %d",opResult);
                free(serialized_descriptor);
                return result;
        }
        //printf("[usb_hub] deserializing descriptor\n");
        descriptor = usb_deserialize_hub_desriptor(serialized_descriptor);
        if(descriptor==NULL){
                dprintf(1,"[usb_hub] could not deserialize descriptor ");
                result->port_count = 1;///\TODO this code is only for debug!!!
                return result;
        }
        //printf("[usb_hub] setting port count to %d\n",descriptor->ports_count);
        result->port_count = descriptor->ports_count;
        result->attached_devs = (usb_hub_attached_device_t*)
            malloc((result->port_count+1) * sizeof(usb_hub_attached_device_t));
        int i;
        for(i=0;i<result->port_count+1;++i){
                result->attached_devs[i].devman_handle=0;
                result->attached_devs[i].address=0;
        }
        //printf("[usb_hub] freeing data\n");
        free(serialized_descriptor);
        free(descriptor->devices_removable);
        free(descriptor);

        //finish

        dprintf(1,"[usb_hub] hub info created");

        return result;
}

int usb_add_hub_device(device_t *dev) {
        dprintf(1, "add_hub_device(handle=%d)", (int) dev->handle);
        dprintf(1,"[usb_hub] hub device");

        /*
         * We are some (probably deeply nested) hub.
         * Thus, assign our own operations and explore already
         * connected devices.
         */
        dev->ops = &hub_device_ops;

        //create the hub structure
        //get hc connection
        int hc = usb_drv_hc_connect_auto(dev, 0);
        if (hc < 0) {
                return hc;
        }

        usb_hub_info_t * hub_info = usb_create_hub_info(dev, hc);
        int port;
        int opResult;
        usb_device_request_setup_packet_t request;
        usb_target_t target;
        target.address = hub_info->usb_device->address;
        target.endpoint = 0;

        //get configuration descriptor
        // this is not fully correct - there are more configurations
        // and all should be checked
        usb_standard_device_descriptor_t std_descriptor;
        opResult = usb_drv_req_get_device_descriptor(hc, target.address,
    &std_descriptor);
        if(opResult!=EOK){
                dprintf(1,"[usb_hub] could not get device descriptor, %d",opResult);
                return opResult;
        }
        dprintf(1,"[usb_hub] hub has %d configurations",std_descriptor.configuration_count);
        if(std_descriptor.configuration_count<1){
                dprintf(1,"[usb_hub] THERE ARE NO CONFIGURATIONS AVAILABLE");
        }
        usb_standard_configuration_descriptor_t config_descriptor;
        opResult = usb_drv_req_get_bare_configuration_descriptor(hc,
        target.address, 0,
        &config_descriptor);
        if(opResult!=EOK){
                dprintf(1,"[usb_hub] could not get configuration descriptor, %d",opResult);
                return opResult;
        }
        //set configuration
        request.request_type = 0;
        request.request = USB_DEVREQ_SET_CONFIGURATION;
        request.index=0;
        request.length=0;
        request.value_high=0;
        request.value_low = config_descriptor.configuration_number;
        opResult = usb_drv_sync_control_write(hc, target, &request, NULL, 0);
        if (opResult != EOK) {
                dprintf(1,"[usb_hub]something went wrong when setting hub`s configuration, %d", opResult);
        }


        for (port = 1; port < hub_info->port_count+1; ++port) {
                usb_hub_set_power_port_request(&request, port);
                opResult = usb_drv_sync_control_write(hc, target, &request, NULL, 0);
                dprintf(1,"[usb_hub] powering port %d",port);
                if (opResult != EOK) {
                        dprintf(1,"[usb_hub]something went wrong when setting hub`s %dth port", port);
                }
        }
        //ports powered, hub seems to be enabled


        ipc_hangup(hc);

        //add the hub to list
        usb_lst_append(&usb_hub_list, hub_info);
        dprintf(1,"[usb_hub] hub info added to list");
        //(void)hub_info;
        usb_hub_check_hub_changes();

        

        dprintf(1,"[usb_hub] hub dev added");
        dprintf(1,"\taddress %d, has %d ports ",
                        hub_info->usb_device->address,
                        hub_info->port_count);
        dprintf(1,"\tused configuration %d",config_descriptor.configuration_number);

        return EOK;
        //return ENOTSUP;
}



//*********************************************
//
//  hub driver code, main loop
//
//*********************************************

/**
 * reset the port with new device and reserve the default address
 * @param hc
 * @param port
 * @param target
 */
static void usb_hub_init_add_device(int hc, uint16_t port, usb_target_t target) {
        usb_device_request_setup_packet_t request;
        int opResult;
        dprintf(1,"[usb_hub] some connection changed");
        //get default address
        opResult = usb_drv_reserve_default_address(hc);
        if (opResult != EOK) {
                dprintf(1,"[usb_hub] cannot assign default address, it is probably used");
                return;
        }
        //reset port
        usb_hub_set_reset_port_request(&request, port);
        opResult = usb_drv_sync_control_write(
                        hc, target,
                        &request,
                        NULL, 0
                        );
        if (opResult != EOK) {
                dprintf(1,"[usb_hub] something went wrong when reseting a port");
        }
}

/**
 * convenience function for releasing default address and writing debug info
 * (these few lines are used too often to be written again and again)
 * @param hc
 * @return
 */
inline static int usb_hub_release_default_address(int hc){
        int opResult;
        dprintf(1,"[usb_hub] releasing default address");
        opResult = usb_drv_release_default_address(hc);
        if (opResult != EOK) {
                dprintf(1,"[usb_hub] failed to release default address");
        }
        return opResult;
}


/**
 * finalize adding new device after port reset
 * @param hc
 * @param port
 * @param target
 */
static void usb_hub_finalize_add_device( usb_hub_info_t * hub,
                int hc, uint16_t port, usb_target_t target) {

        int opResult;
        dprintf(1,"[usb_hub] finalizing add device");
        opResult = usb_hub_clear_port_feature(hc, target.address,
            port, USB_HUB_FEATURE_C_PORT_RESET);
        if (opResult != EOK) {
                dprintf(1,"[usb_hub] failed to clear port reset feature");
                usb_hub_release_default_address(hc);
                return;
        }

        /* Request address at from host controller. */
        usb_address_t new_device_address = usb_drv_request_address(hc);
        if (new_device_address < 0) {
                dprintf(1,"[usb_hub] failed to get free USB address");
                opResult = new_device_address;
                usb_hub_release_default_address(hc);
                return;
        }
        dprintf(1,"[usb_hub] setting new address");
        opResult = usb_drv_req_set_address(hc, USB_ADDRESS_DEFAULT,
            new_device_address);

        if (opResult != EOK) {
                dprintf(1,"[usb_hub] could not set address for new device");
                usb_hub_release_default_address(hc);
                return;
        }


        opResult = usb_hub_release_default_address(hc);
        if(opResult!=EOK){
                return;
        }

        devman_handle_t child_handle;
        opResult = usb_drv_register_child_in_devman(hc, hub->device,
            new_device_address, &child_handle);
        if (opResult != EOK) {
                dprintf(1,"[usb_hub] could not start driver for new device");
                return;
        }
        hub->attached_devs[port].devman_handle = child_handle;
        hub->attached_devs[port].address = new_device_address;

        opResult = usb_drv_bind_address(hc, new_device_address, child_handle);
        if (opResult != EOK) {
                dprintf(1,"[usb_hub] could not assign address of device in hcd");
                return;
        }
        dprintf(1,"[usb_hub] new device address %d, handle %zu",
            new_device_address, child_handle);

}

/**
 * unregister device address in hc, close the port
 * @param hc
 * @param port
 * @param target
 */
static void usb_hub_removed_device(
    usb_hub_info_t * hub, int hc, uint16_t port, usb_target_t target) {
        //usb_device_request_setup_packet_t request;
        int opResult;
        //disable port
        /*usb_hub_set_disable_port_request(&request, port);
        opResult = usb_drv_sync_control_write(
                        hc, target,
                        &request,
                        NULL, 0
                        );
        if (opResult != EOK) {
                //continue;
                printf("[usb_hub] something went wrong when disabling a port\n");
        }*/
        /// \TODO remove device

        hub->attached_devs[port].devman_handle=0;
        //close address
        if(hub->attached_devs[port].address!=0){
                opResult = usb_drv_release_address(hc,hub->attached_devs[port].address);
                if(opResult != EOK) {
                        dprintf(1,
                                        "[usb_hub] could not release address of removed device: %d"
                                        ,opResult);
                }
                hub->attached_devs[port].address = 0;
        }else{
                dprintf(1,
                                "[usb_hub] this is strange, disconnected device had no address");
                //device was disconnected before it`s port was reset - return default address
                usb_drv_release_default_address(hc);
        }
}

/**
 * process interrupts on given hub port
 * @param hc
 * @param port
 * @param target
 */
static void usb_hub_process_interrupt(usb_hub_info_t * hub, int hc,
        uint16_t port, usb_address_t address) {
        dprintf(1,"[usb_hub] interrupt at port %d", port);
        //determine type of change
        usb_target_t target;
        target.address=address;
        target.endpoint=0;
        usb_port_status_t status;
        size_t rcvd_size;
        usb_device_request_setup_packet_t request;
        int opResult;
        usb_hub_set_port_status_request(&request, port);
        //endpoint 0

        opResult = usb_drv_sync_control_read(
                        hc, target,
                        &request,
                        &status, 4, &rcvd_size
                        );
        if (opResult != EOK) {
                dprintf(1,"[usb_hub] ERROR: could not get port status");
                return;
        }
        if (rcvd_size != sizeof (usb_port_status_t)) {
                dprintf(1,"[usb_hub] ERROR: received status has incorrect size");
                return;
        }
        //something connected/disconnected
        if (usb_port_connect_change(&status)) {
                opResult = usb_hub_clear_port_feature(hc, target.address,
                    port, USB_HUB_FEATURE_C_PORT_CONNECTION);
                // TODO: check opResult
                if (usb_port_dev_connected(&status)) {
                        dprintf(1,"[usb_hub] some connection changed");
                        usb_hub_init_add_device(hc, port, target);
                } else {
                        usb_hub_removed_device(hub, hc, port, target);
                }
        }
        //port reset
        if (usb_port_reset_completed(&status)) {
                dprintf(1,"[usb_hub] port reset complete");
                if (usb_port_enabled(&status)) {
                        usb_hub_finalize_add_device(hub, hc, port, target);
                } else {
                        dprintf(1,"[usb_hub] ERROR: port reset, but port still not enabled");
                }
        }

        usb_port_set_connect_change(&status, false);
        usb_port_set_reset(&status, false);
        usb_port_set_reset_completed(&status, false);
        usb_port_set_dev_connected(&status, false);
        if (status) {
                dprintf(1,"[usb_hub]there was some unsupported change on port %d",port);
        }
        /// \TODO handle other changes
        /// \TODO debug log for various situations

}

/* Check changes on all known hubs.
 */
void usb_hub_check_hub_changes(void) {
        /*
         * Iterate through all hubs.
         */
        usb_general_list_t * lst_item;
        for (lst_item = usb_hub_list.next;
                        lst_item != &usb_hub_list;
                        lst_item = lst_item->next) {
                usb_hub_info_t * hub_info = ((usb_hub_info_t*)lst_item->data);
                /*
                 * Check status change pipe of this hub.
                 */

                usb_target_t target;
                target.address = hub_info->usb_device->address;
                target.endpoint = 1;/// \TODO get from endpoint descriptor
                /*dprintf(1,"[usb_hub] checking changes for hub at addr %d",
                    target.address);*/

                size_t port_count = hub_info->port_count;

                /*
                 * Connect to respective HC.
                 */
                int hc = usb_drv_hc_connect_auto(hub_info->device, 0);
                if (hc < 0) {
                        continue;
                }

                /// FIXME: count properly
                size_t byte_length = ((port_count+1) / 8) + 1;

                void *change_bitmap = malloc(byte_length);
                size_t actual_size;
                usb_handle_t handle;

                /*
                 * Send the request.
                 */
                int opResult = usb_drv_async_interrupt_in(hc, target,
                                change_bitmap, byte_length, &actual_size,
                                &handle);

                usb_drv_async_wait_for(handle);

                if (opResult != EOK) {
                        dprintf(1,"[usb_hub] something went wrong while getting status of hub");
                        continue;
                }
                unsigned int port;
                for (port = 1; port < port_count+1; ++port) {
                        bool interrupt =
                                        (((uint8_t*) change_bitmap)[port / 8] >> (port % 8)) % 2;
                        if (interrupt) {
                                usb_hub_process_interrupt(
                                        hub_info, hc, port, hub_info->usb_device->address);
                        }
                }

                ipc_hangup(hc);
        }
}





/**
 * @}
 */