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// Copyright 2013 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package usb
/*
#ifndef OS_WINDOWS
#include "os/threads_posix.h"
#endif
#include "libusbi.h"
#include "libusb.h"
*/
import "C"
import (
"fmt"
"reflect"
"unsafe"
)
type EndpointInfo struct {
Address uint8
Attributes uint8
MaxPacketSize uint16
MaxIsoPacket uint32
PollInterval uint8
RefreshRate uint8
SynchAddress uint8
}
func (e EndpointInfo) Number() int {
return int(e.Address) & ENDPOINT_NUM_MASK
}
func (e EndpointInfo) Direction() EndpointDirection {
return EndpointDirection(e.Address) & ENDPOINT_DIR_MASK
}
func (e EndpointInfo) String() string {
return fmt.Sprintf("Endpoint %d %-3s %s - %s %s [%d %d]",
e.Number(), e.Direction(),
TransferType(e.Attributes)&TRANSFER_TYPE_MASK,
IsoSyncType(e.Attributes)&ISO_SYNC_TYPE_MASK,
IsoUsageType(e.Attributes)&ISO_USAGE_TYPE_MASK,
e.MaxPacketSize, e.MaxIsoPacket,
)
}
type InterfaceInfo struct {
Number uint8
Setups []InterfaceSetup
}
func (i InterfaceInfo) String() string {
return fmt.Sprintf("Interface %02x (%d setups)", i.Number, len(i.Setups))
}
type InterfaceSetup struct {
Number uint8
Alternate uint8
IfClass uint8
IfSubClass uint8
IfProtocol uint8
Endpoints []EndpointInfo
}
func (a InterfaceSetup) String() string {
return fmt.Sprintf("Interface %02x Setup %02x", a.Number, a.Alternate)
}
type ConfigInfo struct {
Config uint8
Attributes uint8
MaxPower uint8
Interfaces []InterfaceInfo
}
func (c ConfigInfo) String() string {
return fmt.Sprintf("Config %02x", c.Config)
}
func newConfig(dev *C.libusb_device, cfg *C.struct_libusb_config_descriptor) ConfigInfo {
c := ConfigInfo{
Config: uint8(cfg.bConfigurationValue),
Attributes: uint8(cfg.bmAttributes),
MaxPower: uint8(cfg.MaxPower),
}
var ifaces []C.struct_libusb_interface
*(*reflect.SliceHeader)(unsafe.Pointer(&ifaces)) = reflect.SliceHeader{
Data: uintptr(unsafe.Pointer(cfg._interface)),
Len: int(cfg.bNumInterfaces),
Cap: int(cfg.bNumInterfaces),
}
c.Interfaces = make([]InterfaceInfo, 0, len(ifaces))
for _, iface := range ifaces {
if iface.num_altsetting == 0 {
continue
}
var alts []C.struct_libusb_interface_descriptor
*(*reflect.SliceHeader)(unsafe.Pointer(&alts)) = reflect.SliceHeader{
Data: uintptr(unsafe.Pointer(iface.altsetting)),
Len: int(iface.num_altsetting),
Cap: int(iface.num_altsetting),
}
descs := make([]InterfaceSetup, 0, len(alts))
for _, alt := range alts {
i := InterfaceSetup{
Number: uint8(alt.bInterfaceNumber),
Alternate: uint8(alt.bAlternateSetting),
IfClass: uint8(alt.bInterfaceClass),
IfSubClass: uint8(alt.bInterfaceSubClass),
IfProtocol: uint8(alt.bInterfaceProtocol),
}
var ends []C.struct_libusb_endpoint_descriptor
*(*reflect.SliceHeader)(unsafe.Pointer(&ends)) = reflect.SliceHeader{
Data: uintptr(unsafe.Pointer(alt.endpoint)),
Len: int(alt.bNumEndpoints),
Cap: int(alt.bNumEndpoints),
}
i.Endpoints = make([]EndpointInfo, 0, len(ends))
for _, end := range ends {
i.Endpoints = append(i.Endpoints, EndpointInfo{
Address: uint8(end.bEndpointAddress),
Attributes: uint8(end.bmAttributes),
MaxPacketSize: uint16(end.wMaxPacketSize),
//MaxIsoPacket: uint32(C.libusb_get_max_iso_packet_size(dev, C.uchar(end.bEndpointAddress))),
PollInterval: uint8(end.bInterval),
RefreshRate: uint8(end.bRefresh),
SynchAddress: uint8(end.bSynchAddress),
})
}
descs = append(descs, i)
}
c.Interfaces = append(c.Interfaces, InterfaceInfo{
Number: descs[0].Number,
Setups: descs,
})
}
return c
}
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