150 lines
3.8 KiB
Go
150 lines
3.8 KiB
Go
// Copyright 2017 the gousb Authors. 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
|
|
|
|
import (
|
|
"errors"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
type fakeTransfer struct {
|
|
// done is the channel that needs to be closed when the transfer has finished.
|
|
done chan struct{}
|
|
// buf is the slice for reading/writing data between the submit() and wait() returning.
|
|
buf []byte
|
|
// status will be returned by wait() on this transfer
|
|
status TransferStatus
|
|
// length is the number of bytes used from the buffer (write) or available
|
|
// in the buffer (read).
|
|
length int
|
|
}
|
|
|
|
type fakeLibusb struct {
|
|
libusbIntf
|
|
|
|
mu sync.Mutex
|
|
// ts has a map of all allocated transfers, indexed by the pointer of
|
|
// underlying libusbTransfer.
|
|
ts map[*libusbTransfer]*fakeTransfer
|
|
// submitted receives a fakeTransfers when submit() is called.
|
|
submitted chan *fakeTransfer
|
|
// handlers is a map of device handles pointing at opened devices.
|
|
handlers map[*libusbDevHandle]*libusbDevice
|
|
}
|
|
|
|
func (f *fakeLibusb) alloc(_ *libusbDevHandle, _ uint8, _ TransferType, _ time.Duration, _ int, buf []byte) (*libusbTransfer, error) {
|
|
f.mu.Lock()
|
|
defer f.mu.Unlock()
|
|
t := new(libusbTransfer)
|
|
f.ts[t] = &fakeTransfer{buf: buf}
|
|
return t, nil
|
|
}
|
|
|
|
func (f *fakeLibusb) submit(t *libusbTransfer, done chan struct{}) error {
|
|
f.mu.Lock()
|
|
ft := f.ts[t]
|
|
f.mu.Unlock()
|
|
ft.done = done
|
|
f.submitted <- ft
|
|
return nil
|
|
}
|
|
|
|
func (f *fakeLibusb) cancel(t *libusbTransfer) error { return nil }
|
|
func (f *fakeLibusb) free(t *libusbTransfer) {
|
|
f.mu.Lock()
|
|
defer f.mu.Unlock()
|
|
delete(f.ts, t)
|
|
}
|
|
|
|
func (f *fakeLibusb) data(t *libusbTransfer) (int, TransferStatus) {
|
|
f.mu.Lock()
|
|
defer f.mu.Unlock()
|
|
return f.ts[t].length, f.ts[t].status
|
|
}
|
|
|
|
func (f *fakeLibusb) waitForSubmitted() *fakeTransfer {
|
|
return <-f.submitted
|
|
}
|
|
|
|
func newFakeLibusb() *fakeLibusb {
|
|
return &fakeLibusb{
|
|
ts: make(map[*libusbTransfer]*fakeTransfer),
|
|
submitted: make(chan *fakeTransfer, 10),
|
|
handlers: make(map[*libusbDevHandle]*libusbDevice),
|
|
libusbIntf: libusbImpl{},
|
|
}
|
|
}
|
|
|
|
var (
|
|
fakeDev1 = new(libusbDevice)
|
|
fakeDev2 = new(libusbDevice)
|
|
)
|
|
|
|
func (f *fakeLibusb) getDevices(*libusbContext) ([]*libusbDevice, error) {
|
|
return []*libusbDevice{fakeDev1, fakeDev2}, nil
|
|
}
|
|
|
|
func (f *fakeLibusb) getDeviceDesc(d *libusbDevice) (*Descriptor, error) {
|
|
switch d {
|
|
case fakeDev1:
|
|
// Bus 001 Device 001: ID 9999:0001
|
|
// One config, one interface, one setup,
|
|
// two endpoints: 0x01 write, 0x82 read.
|
|
return &Descriptor{
|
|
Bus: 1,
|
|
Address: 1,
|
|
Spec: USB_2_0,
|
|
Device: BCD(0x0100), // 1.00
|
|
Vendor: ID(0x9999),
|
|
Product: ID(0x0001),
|
|
Protocol: 255,
|
|
Configs: []ConfigInfo{{
|
|
Config: 1,
|
|
Attributes: uint8(TRANSFER_TYPE_BULK),
|
|
MaxPower: 50, // * 2mA
|
|
Interfaces: []InterfaceInfo{{
|
|
Number: 0,
|
|
Setups: []InterfaceSetup{{
|
|
Number: 0,
|
|
Alternate: 0,
|
|
IfClass: uint8(CLASS_VENDOR_SPEC),
|
|
Endpoints: []EndpointInfo{},
|
|
}},
|
|
}},
|
|
}},
|
|
}, nil
|
|
case fakeDev2:
|
|
return &Descriptor{}, nil
|
|
}
|
|
return nil, errors.New("invalid USB device")
|
|
}
|
|
|
|
func (f *fakeLibusb) dereference(d *libusbDevice) {}
|
|
|
|
func (f *fakeLibusb) open(d *libusbDevice) (*libusbDevHandle, error) {
|
|
h := new(libusbDevHandle)
|
|
f.mu.Lock()
|
|
defer f.mu.Unlock()
|
|
f.handlers[h] = d
|
|
return h, nil
|
|
}
|
|
|
|
func (f *fakeLibusb) close(h *libusbDevHandle) {
|
|
f.mu.Lock()
|
|
defer f.mu.Unlock()
|
|
delete(f.handlers, h)
|
|
}
|