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Android: add more verbose logging when trying to open USB

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The goal is to be able to tell what's actually going wrong.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2018-06-30 17:50:15 -07:00
parent 2ca8b98091
commit 8b37e3f10e
1 changed files with 6 additions and 0 deletions
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6
core/android.cpp
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@ -112,6 +112,7 @@ int get_usb_fd(uint16_t idVendor, uint16_t idProduct)
jint num_devices = deviceMap.callMethod<jint>("size", "()I");
if (num_devices == 0) {
// No USB device is attached.
LOG("usbManager says no devices attached");
return -1;
}
@ -124,11 +125,13 @@ int get_usb_fd(uint16_t idVendor, uint16_t idProduct)
usbDevice = deviceMap.callObjectMethod ("get", "(Ljava/lang/Object;)Ljava/lang/Object;", usbName.object());
vendorid = usbDevice.callMethod<jint>("getVendorId", "()I");
productid = usbDevice.callMethod<jint>("getProductId", "()I");
LOG(QString("Looking at device with VID/PID %1/%2").arg(vendorid).arg(productid));
if(vendorid == idVendor && productid == idProduct) // Found the requested device
break;
}
if (i == num_devices) {
// No device found.
LOG(QString("Didn't find device matching %1/%2").arg(idVendor).arg(idProduct))
errno = ENOENT;
return -1;
}
@ -138,6 +141,7 @@ int get_usb_fd(uint16_t idVendor, uint16_t idProduct)
// You do not have permission to use the usbDevice.
// Please remove and reinsert the USB device.
// Could also give an dialogbox asking for permission.
LOG("usbManager tells us we don't have permission to access this device");
errno = EPERM;
return -1;
}
@ -147,6 +151,7 @@ int get_usb_fd(uint16_t idVendor, uint16_t idProduct)
QAndroidJniObject usbDeviceConnection = usbManager.callObjectMethod("openDevice", "(Landroid/hardware/usb/UsbDevice;)Landroid/hardware/usb/UsbDeviceConnection;", usbDevice.object());
if (usbDeviceConnection.object() == NULL) {
// Some error occurred while opening the device. Exit.
LOG("usbManager said we had permission to access, but then opening the device failed");
errno = EINVAL;
return -1;
}
@ -155,6 +160,7 @@ int get_usb_fd(uint16_t idVendor, uint16_t idProduct)
fd = usbDeviceConnection.callMethod<jint>("getFileDescriptor", "()I");
if (fd == -1) {
// The device is not opened. Some error.
LOG("usbManager said we successfully opened the device, but the fd was -1");
errno = ENODEV;
return -1;
}