PSVita UDCD SceUdcdDriver check

/* SceUdcd module base: 0x01E10000, LOAD:01E142B4 udcd_check_driver */
int __cdecl udcd_check_driver(const SceUdcdDriver *driver)
{
        SceUdcdDeviceDescriptor *device_descriptor; // r6@1
        SceUdcdConfiguration *configuration; // r5@2
        unsigned int bMaxPacketSize0; // r3@3
        SceUdcdConfigDescriptor *config_descriptors; // r3@7
        SceUdcdInterfaceSettings *interface_settings; // r2@8
        int bNumInterfaces; // r4@9
        int cnt; // r3@11
        SceUdcdEndpointDescriptor *endpoint_descriptors; // r3@15
        SceUdcdEndpointDescriptor *endpoint_ptr; // r3@17
        signed int wMaxPacketSize; // r1@18
        int bmAttributes; // r2@18
        int bLength; // t1@25
        SceUdcdDeviceDescriptor *device_descriptor_hi; // r3@26
        SceUdcdConfiguration *configuration_hi; // r4@27
        int result; // r0@29
        SceUdcdConfigDescriptor *config_descriptors_hi; // r3@31
        SceUdcdInterfaceSettings *interface_settings_hi; // r2@32
        int bNumInterfaces_hi; // r0@33
        int cnt_hi; // r3@35
        SceUdcdEndpointDescriptor *endpoint_descriptors_hi; // r3@39
        SceUdcdEndpointDescriptor *endpoint_ptr_hi; // r3@41
        signed int wMaxPacketSize_hi; // r1@41
        int bmAttributes_hi; // r2@41
        int bLength_hi; // t1@45

        device_descriptor = driver->descriptor;
        if ( !device_descriptor )
                return 0x80243306;
        configuration = driver->configuration;
        if ( !configuration )
                return 0x80243306;
        bMaxPacketSize0 = device_descriptor->bMaxPacketSize0;
        if ( bMaxPacketSize0 != 0x10 )
        {
                if ( bMaxPacketSize0 <= 0x10 )
                {
                        if ( bMaxPacketSize0 != 8 )
                                return 0x80243301;
                }
                else if ( bMaxPacketSize0 != 0x20 && bMaxPacketSize0 != 0x40 )
                {
                        return 0x80243301;
                }
        }
        config_descriptors = configuration->configDescriptors;
        if ( !configuration->configDescriptors )
                return 0x80243306;
        interface_settings = configuration->settings;
        if ( !interface_settings )
                return 0x80243306;
        bNumInterfaces = config_descriptors->bNumInterfaces;
        if ( config_descriptors->bNumInterfaces )
        {
                if ( (signed int)interface_settings->numDescriptors > 2 )
                        return 0x80243303;
                cnt = 0;
                while ( 1 )
                {
                        ++cnt;
                        ++interface_settings;
                        if ( bNumInterfaces <= cnt )
                                break;
                        if ( (signed int)interface_settings->numDescriptors > 2 )
                                return 0x80243303;
                }
        }
        if ( !configuration->interfaceDescriptors )
                return 0x80243306;
        endpoint_descriptors = configuration->endpointDescriptors;
        if ( endpoint_descriptors && endpoint_descriptors->bLength )
        {
                endpoint_ptr = endpoint_descriptors + 1;
                do
                {
                        wMaxPacketSize = endpoint_ptr[-1u].wMaxPacketSize;
                        bmAttributes = endpoint_ptr[-1u].bmAttributes & 3;
                        if ( bmAttributes != 2 )
                        {
                                if ( bmAttributes == 3 )
                                {
                                        if ( wMaxPacketSize > 0x40 )
                                                return 0x80243305;
                                        goto LABEL_25;
                                }
                                if ( bmAttributes == 1 )
                                {
                                        if ( wMaxPacketSize >= 0x400 )
                                                return 0x80243305;
                                        goto LABEL_25;
                                }
                        }
                        if ( wMaxPacketSize != 0x10 )
                        {
                                if ( (unsigned int)wMaxPacketSize <= 0x10 )
                                {
                                        if ( wMaxPacketSize != 8 )
                                                return 0x80243305;
                                }
                                else if ( wMaxPacketSize != 0x20 && wMaxPacketSize != 0x40 )
                                {
                                        return 0x80243305;
                                }
                        }
LABEL_25:
                        bLength = endpoint_ptr->bLength;
                        ++endpoint_ptr;
                }
                while ( bLength );
        }
        device_descriptor_hi = driver->descriptor_hi;
        if ( !device_descriptor_hi )
        {
                if ( driver->configuration_hi )
                        result = 0x80243306;
                else
                        result = 0;
                return result;
        }
        configuration_hi = driver->configuration_hi;
        if ( !configuration_hi )
                return 0x80243306;
        if ( (unsigned int)device_descriptor->bcdUSB < 0x200 )
                return 0;
        if ( device_descriptor_hi->bMaxPacketSize0 != 0x40 )
                return 0x80243301;
        config_descriptors_hi = configuration_hi->configDescriptors;
        if ( !configuration_hi->configDescriptors )
                return 0x80243306;
        interface_settings_hi = configuration_hi->settings;
        if ( !interface_settings_hi )
                return 0x80243306;
        bNumInterfaces_hi = config_descriptors_hi->bNumInterfaces;
        if ( config_descriptors_hi->bNumInterfaces )
        {
                if ( (signed int)interface_settings_hi->numDescriptors <= 2 )
                {
                        cnt_hi = 0;
                        while ( 1 )
                        {
                                ++cnt_hi;
                                ++interface_settings_hi;
                                if ( cnt_hi >= bNumInterfaces_hi )
                                        break;
                                if ( (signed int)interface_settings_hi->numDescriptors > 2 )
                                        return 0x80243303;
                        }
                        goto LABEL_38;
                }
                return 0x80243303;
        }
LABEL_38:
        if ( !configuration_hi->interfaceDescriptors )
                return 0x80243306;
        endpoint_descriptors_hi = configuration_hi->endpointDescriptors;
        result = (int)endpoint_descriptors_hi;
        if ( endpoint_descriptors_hi )
        {
                result = endpoint_descriptors_hi->bLength;
                if ( endpoint_descriptors_hi->bLength )
                {
                        endpoint_ptr_hi = endpoint_descriptors_hi + 1;
                        wMaxPacketSize_hi = endpoint_ptr_hi[-1u].wMaxPacketSize;
                        bmAttributes_hi = endpoint_ptr_hi[-1u].bmAttributes & 3;
                        if ( bmAttributes_hi == 2 )
                                goto LABEL_47;
LABEL_42:
                        if ( bmAttributes_hi != 3 && bmAttributes_hi != 1 )
                        {
                                if ( wMaxPacketSize_hi == 0x40 )
                                        goto LABEL_45;
                                return 0x80243305;
                        }
                        if ( wMaxPacketSize_hi > 0x400 )
                                return 0x80243305;
LABEL_45:
                        while ( 1 )
                        {
                                bLength_hi = endpoint_ptr_hi->bLength;
                                ++endpoint_ptr_hi;
                                result = bLength_hi;
                                if ( !bLength_hi )
                                        break;
                                wMaxPacketSize_hi = endpoint_ptr_hi[-1u].wMaxPacketSize;
                                bmAttributes_hi = endpoint_ptr_hi[-1u].bmAttributes & 3;
                                if ( bmAttributes_hi != 2 )
                                        goto LABEL_42;
LABEL_47:
                                if ( wMaxPacketSize_hi != 0x200 )
                                        return 0x80243305;
                        }
                }
        }
        return result;
}