source: mainline/uspace/drv/usbhub/utils.c@ a59cdd2

/*
 * 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 libusb usb
 * @{
 */
/** @file
 * @brief Hub driver.
 */
#include <driver.h>
#include <usb/devreq.h>
#include <usbhc_iface.h>
#include <usb/usbdrv.h>
#include <usb/descriptor.h>
#include <driver.h>
#include <bool.h>
#include <errno.h>
#include <usb/classes/hub.h>
#include "usbhub.h"
#include "usbhub_private.h"
#include "port_status.h"
#include <usb/devreq.h>

static void check_hub_changes(void);

size_t USB_HUB_MAX_DESCRIPTOR_SIZE = 71;

//*********************************************
//
//  various utils
//
//*********************************************

//hub descriptor 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) {
                printf("[usb_hub] wrong descriptor %x\n",sdescriptor[1]);
                return NULL;
        }

        usb_hub_descriptor_t * result = usb_new(usb_hub_descriptor_t);
        

        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);
        //printf("[usb_hub] getting removable devices data \n");
        size_t i;
        for (i = 0; i < var_size; ++i) {
                result->devices_removable[i] = sdescriptor[7 + i];
        }
        return result;
}

//control transactions

int usb_drv_sync_control_read(
                int phone, usb_target_t target,
                usb_device_request_setup_packet_t * request,
                void * rcvd_buffer, size_t rcvd_size, size_t * actual_size
                ) {
        usb_handle_t handle;
        int opResult;
        //setup
        opResult = usb_drv_async_control_read_setup(phone, target,
                        request, sizeof (usb_device_request_setup_packet_t),
                        &handle);
        if (opResult != EOK) {
                return opResult;
        }
        opResult = usb_drv_async_wait_for(handle);
        if (opResult != EOK) {
                return opResult;
        }
        //read
        opResult = usb_drv_async_control_read_data(phone, target,
                        rcvd_buffer, rcvd_size, actual_size,
                        &handle);
        if (opResult != EOK) {
                return opResult;
        }
        opResult = usb_drv_async_wait_for(handle);
        if (opResult != EOK) {
                return opResult;
        }
        //finalize
        opResult = usb_drv_async_control_read_status(phone, target,
                        &handle);
        if (opResult != EOK) {
                return opResult;
        }
        opResult = usb_drv_async_wait_for(handle);
        if (opResult != EOK) {
                return opResult;
        }
        return EOK;
}

int usb_drv_sync_control_write(
                int phone, usb_target_t target,
                usb_device_request_setup_packet_t * request,
                void * sent_buffer, size_t sent_size
                ) {
        usb_handle_t handle;
        int opResult;
        //setup
        opResult = usb_drv_async_control_write_setup(phone, target,
                        request, sizeof (usb_device_request_setup_packet_t),
                        &handle);
        if (opResult != EOK) {
                return opResult;
        }
        opResult = usb_drv_async_wait_for(handle);
        if (opResult != EOK) {
                return opResult;
        }
        //write
        opResult = usb_drv_async_control_write_data(phone, target,
                        sent_buffer, sent_size,
                        &handle);
        if (opResult != EOK) {
                return opResult;
        }
        opResult = usb_drv_async_wait_for(handle);
        if (opResult != EOK) {
                return opResult;
        }
        //finalize
        opResult = usb_drv_async_control_write_status(phone, target,
                        &handle);
        if (opResult != EOK) {
                return opResult;
        }
        opResult = usb_drv_async_wait_for(handle);
        if (opResult != EOK) {
                return opResult;
        }
        return EOK;
}

//list implementation

usb_general_list_t * usb_lst_create(void) {
        usb_general_list_t* result = usb_new(usb_general_list_t);
        usb_lst_init(result);
        return result;
}

void usb_lst_init(usb_general_list_t * lst) {
        lst->prev = lst;
        lst->next = lst;
        lst->data = NULL;
}

void usb_lst_prepend(usb_general_list_t* item, void* data) {
        usb_general_list_t* appended = usb_new(usb_general_list_t);
        appended->data = data;
        appended->next = item;
        appended->prev = item->prev;
        item->prev->next = appended;
        item->prev = appended;
}

void usb_lst_append(usb_general_list_t* item, void* data) {
        usb_general_list_t* appended = usb_new(usb_general_list_t);
        appended->data = data;
        appended->next = item->next;
        appended->prev = item;
        item->next->prev = appended;
        item->next = appended;
}

void usb_lst_remove(usb_general_list_t* item) {
        item->next->prev = item->prev;
        item->prev->next = item->next;
}

static void usb_hub_test_port_status(void) {
        printf("[usb_hub] -------------port status test---------\n");
        usb_port_status_t status = 0;

        //printf("original status %d (should be 0)\n",(uint32_t)status);
        usb_port_set_bit(&status, 1, 1);
        //printf("%d =?= 2\n",(uint32_t)status);
        if (status != 2) {
                printf("[usb_port_status] test failed: wrong set of bit 1\n");
                return;
        }
        usb_port_set_bit(&status, 3, 1);
        if (status != 10) {
                printf("[usb_port_status] test failed: wrong set of bit 3\n");
                return;
        }

        usb_port_set_bit(&status, 15, 1);
        if (status != 10 + (1 << 15)) {
                printf("[usb_port_status] test failed: wrong set of bit 15\n");
                return;
        }
        usb_port_set_bit(&status, 1, 0);
        if (status != 8 + (1 << 15)) {
                printf("[usb_port_status] test failed: wrong unset of bit 1\n");
                return;
        }
        int i;
        for (i = 0; i < 32; ++i) {
                if (i == 3 || i == 15) {
                        if (!usb_port_get_bit(&status, i)) {
                                printf("[usb_port_status] test failed: wrong bit at %d\n", i);
                        }
                } else {
                        if (usb_port_get_bit(&status, i)) {
                                printf("[usb_port_status] test failed: wrong bit at %d\n", i);
                        }
                }
        }

        printf("test ok\n");


        //printf("%d =?= 10\n",(uint32_t)status);

        //printf("this should be 0: %d \n",usb_port_get_bit(&status,0));
        //printf("this should be 1: %d \n",usb_port_get_bit(&status,1));
        //printf("this should be 0: %d \n",usb_port_get_bit(&status,2));
        //printf("this should be 1: %d \n",usb_port_get_bit(&status,3));
        //printf("this should be 0: %d \n",usb_port_get_bit(&status,4));




}

//*********************************************
//
//  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;


        //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);
        printf("[usb_hub] addres of newly created hub = %d\n", addr);
        /*if(addr<0){
                //return result;
                
        }*/

        result->device = usb_new(usb_hcd_attached_device_info_t);
        result->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) {
                printf("[usb_hub] failed when receiving hub descriptor, badcode = %d\n",opResult);
                ///\TODO memory leak will occur here!
                return result;
        }
        //printf("[usb_hub] deserializing descriptor\n");
        descriptor = usb_deserialize_hub_desriptor(serialized_descriptor);
        if(descriptor==NULL){
                printf("[usb_hub] could not deserialize descriptor \n");
                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;
        //printf("[usb_hub] freeing data\n");
        free(serialized_descriptor);
        free(descriptor->devices_removable);
        free(descriptor);

        //finish

        printf("[usb_hub] hub info created\n");

        return result;
}

/** Callback when new hub device is detected.
 *
 * @param dev New device.
 * @return Error code.
 */
int usb_add_hub_device(device_t *dev) {
        printf(NAME ": add_hub_device(handle=%d)\n", (int) dev->handle);
        printf("[usb_hub] hub device\n");

        /*
         * We are some (probably deeply nested) hub.
         * Thus, assign our own operations and explore already
         * connected devices.
         */

        //create the hub structure
        //get hc connection
        /// \TODO correct params
        int hc = usb_drv_hc_connect(dev, 0);

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

        ipc_hangup(hc);

        //add the hub to list
        usb_lst_append(&usb_hub_list, hub_info);
        printf("[usb_hub] hub info added to list\n");
        //(void)hub_info;
        check_hub_changes();

        /// \TODO start the check loop, if not already started...

        //this is just a test for port status bitmap type
        usb_hub_test_port_status();

        printf("[usb_hub] hub dev added\n");

        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;
        printf("[usb_hub] some connection changed\n");

        opResult = usb_drv_reserve_default_address(hc);
        if (opResult != EOK) {
                printf("[usb_hub] cannot assign default address, it is probably used\n");
                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) {
                //continue;
                printf("[usb_hub] something went wrong when reseting a port\n");
        }
}

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

        usb_device_request_setup_packet_t request;
        int opResult;
        printf("[usb_hub] finalizing add device\n");
        usb_address_t new_device_address =
                        usb_drv_request_address(hc);
        usb_hub_set_set_address_request
                        (&request, new_device_address);
        opResult = usb_drv_sync_control_write(
                        hc, target,
                        &request,
                        NULL, 0
                        );
        if (opResult != EOK) {
                printf("[usb_hub] could not set address for new device\n");
                //will retry later...
                return;
        }
        usb_drv_release_default_address(hc);


        /// \TODO driver work
        //add_child_device.....
}

/**
 * unregister device address in hc, close the port
 * @param hc
 * @param port
 * @param target
 */
static void usb_hub_removed_device(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");
        }
        //remove device
        //close address
        //

        ///\TODO this code is not complete
}

/**
 * process interrupts on given hub port
 * @param hc
 * @param port
 * @param target
 */
static void usb_hub_process_interrupt(int hc, uint16_t port, usb_target_t target) {
        printf("[usb_hub] interrupt at port %d\n", port);
        //determine type of change
        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);

        opResult = usb_drv_sync_control_read(
                        hc, target,
                        &request,
                        &status, 4, &rcvd_size
                        );
        if (opResult != EOK) {
                printf("[usb_hub] ERROR: could not get port status\n");
                return;
        }
        if (rcvd_size != sizeof (usb_port_status_t)) {
                printf("[usb_hub] ERROR: received status has incorrect size\n");
                return;
        }
        //something connected/disconnected
        if (usb_port_connect_change(&status)) {
                if (usb_port_dev_connected(&status)) {
                        printf("[usb_hub] some connection changed\n");
                        usb_hub_init_add_device(hc, port, target);
                } else {
                        usb_hub_removed_device(hc, port, target);
                }
        }
        //port reset
        if (usb_port_reset_completed(&status)) {
                printf("[usb_hub] finalizing add device\n");
                if (usb_port_enabled(&status)) {
                        usb_hub_finalize_add_device(hc, port, target);
                } else {
                        printf("[usb_hub] ERROR: port reset, but port still not enabled\n");
                }
        }

        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) {
                printf("[usb_hub]there was some unsupported change on port\n");
        }
        /// \TODO handle other changes
        /// \TODO debug log for various situations



        /*
        //configure device
        usb_drv_reserve_default_address(hc);

        usb_address_t new_device_address = usb_drv_request_address(hc);


        usb_drv_release_default_address(hc);
         * */
}

/** Check changes on all known hubs.
 */
static void 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) {
                printf("[usb_hub] checking hub changes\n");
                /*
                 * Check status change pipe of this hub.
                 */

                usb_target_t target = {
                        .address = 5,
                        .endpoint = 1
                };
                /// \TODO uncomment once it works correctly
                //target.address = usb_create_hub_info(lst_item)->device->address;

                size_t port_count = 7;

                /*
                 * Connect to respective HC.
                 */
                /// \FIXME this is incorrect code: here
                /// must be used particular device instead of NULL
                //which one?
                int hc = usb_drv_hc_connect(NULL, 0);
                if (hc < 0) {
                        continue;
                }

                // FIXME: count properly
                size_t byte_length = (port_count / 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) {
                        printf("[usb_hub] something went wrong while getting status of hub\n");
                        continue;
                }
                unsigned int port;
                for (port = 0; port < port_count; ++port) {
                        bool interrupt = (((uint8_t*) change_bitmap)[port / 8] >> (port % 8)) % 2;
                        if (interrupt) {
                                usb_hub_process_interrupt(hc, port, target);
                        }
                }


                /*
                 * TODO: handle the changes.
                 */

                /*
                 * WARNING: sample code, will not work out of the box.
                 * And does not contain code for checking for errors.
                 */
#if 0
                /*
                 * Before opening the port, we must acquire the default
                 * address.
                 */
                usb_drv_reserve_default_address(hc);

                usb_address_t new_device_address = usb_drv_request_address(hc);

                // TODO: open the port

                // TODO: send request for setting address to new_device_address

                /*
                 * Once new address is set, we can release the default
                 * address.
                 */
                usb_drv_release_default_address(hc);

                /*
                 * Obtain descriptors and create match ids for devman.
                 */

                // TODO: get device descriptors

                // TODO: create match ids

                // TODO: add child device

                // child_device_register sets the device handle
                // TODO: store it here
                devman_handle_t new_device_handle = 0;

                /*
                 * Inform the HC that the new device has devman handle
                 * assigned.
                 */
                usb_drv_bind_address(hc, new_device_address, new_device_handle);

                /*
                 * That's all.
                 */
#endif


                /*
                 * Hang-up the HC-connected phone.
                 */
                ipc_hangup(hc);
        }
}

/**
 * @}
 */