20 Dec
2020
20 Dec
'20
12:31 p.m.
Hi,
looking into how to add MTP some questions arise
1. Why is there the usb.ids file in
core/tdebase/kcontrol/usbview/usb.ids
Why is the file so outdated - actually has no revision, but compared to
/var/lib/usbutils/usb.ids which is part of package usb.ids
Why not using the officially maintained usb.ids file?
2. the USB ids are handled in tdelibs and tdebase. Adding MTP as separate
tdeio module would impact also these, or is there a better approach?
3. as I understand the TDE library classifies the device based on some
string in the usb.ids, but I am not exactly sure how it will classify one
device as Camera (PTP) and another as MTP.
Can someone elaborate on these questions please?
21 Dec
21 Dec
7:38 p.m.
On Sunday 20 of December 2020 13:31:36 deloptes wrote:
Hi,
looking into how to add MTP some questions arise
1. Why is there the usb.ids file in
core/tdebase/kcontrol/usbview/usb.ids
Why is the file so outdated - actually has no revision, but compared
to /var/lib/usbutils/usb.ids which is part of package usb.ids Why not
using the officially maintained usb.ids file?
There is a build option WITH_USBIDS that allows to specify the usb.ids path
on the system. For example, in tde-packaging for deb packages you can see
that this option is used. Therefore, this file is not installed as part of
deb packages.
2. the USB ids are handled in tdelibs and tdebase.
Adding MTP as
separate tdeio module would impact also these, or is there a better
approach?
How is an MTP tdeio slave assigned to a device? Is it based on a mimetype?
Or does tdeio-mtp work as a special ioslave to find and provide all MTP
devices?
If during the device recognition in tdehw-lib there we would identify the
MTP device and set the appropriate device type and flags, this could
probably be useful?
3. as I understand the TDE library classifies the
device based on some
string in the usb.ids, but I am not exactly sure how it will classify
one device as Camera (PTP) and another as MTP.
Devices in tdehw-lib are recognized by data from udev => values visible in
sysfs and discoverable by udevadm. I tried to find out if there is
information available that the device is MTP and I found the value
ID_MTP_DEVICE=1.
So far, there doesn't seem to be any code in tdehw-lib to recognize and
operate MTP devices.
Can someone elaborate on these questions please?
____________________________________________________
Cheers
--
Slávek
22 Dec
22 Dec
1:09 a.m.
Slávek Banko via tde-devels wrote:
May be I was irritated by 3. below. Thank you for clarification.
Indeed the last one is what I am looking at. If it is recognized in
tdehw-lib, it would be handled as any other devices recognized.
What I see in kio-mtp - it would add MTP device to a devices cache (if I
understand the code correctly - may be it is worth testing this in KDE).
It looks like the Solid is like a management layer between the slave and the
udev that handles all devices attached
In konqueror it should show the device as root object and the storages of
the device below (it usually has internal storage and microSD - would be
something like what is done by mtp-detect (on my Xperia X)
Storage Devices:
StorageID: 0x00010002
StorageType: 0x0003 fixed RAM storage
FilesystemType: 0x0002 generic hierarchical
AccessCapability: 0x0000 read/write
MaxCapacity: 19306098688
FreeSpaceInBytes: 6011613184
FreeSpaceInObjects: 4294967295
StorageDescription: Mass storage
VolumeIdentifier: media
StorageID: 0x00010001
StorageType: 0x0004 removable RAM storage
FilesystemType: 0x0002 generic hierarchical
AccessCapability: 0x0000 read/write
MaxCapacity: 31902400512
FreeSpaceInBytes: 22159196160
FreeSpaceInObjects: 4294967295
StorageDescription: 3434-3234
VolumeIdentifier: media
Special directories:
Default music folder: 0xffffffff
Default playlist folder: 0xffffffff
Default picture folder: 0xffffffff
Default video folder: 0xffffffff
Default organizer folder: 0xffffffff
Default zencast folder: 0xffffffff
Default album folder: 0xffffffff
Default text folder: 0xffffffff
Oh, thank you - I was interpreting the code in the wrong way - the udev
direct use was replaced by Solid.
1. Why is
there the usb.ids file in
core/tdebase/kcontrol/usbview/usb.ids
Why is the file so outdated - actually has no revision, but compared
to /var/lib/usbutils/usb.ids which is part of package usb.ids Why not
using the officially maintained usb.ids file?
There is a build option WITH_USBIDS that allows to specify the usb.ids
path on the system. For example, in tde-packaging for deb packages you can
see that this option is used. Therefore, this file is not installed as
part of deb packages.
2. the USB ids
are handled in tdelibs and tdebase. Adding MTP as
separate tdeio module would impact also these, or is there a better
approach?
How is an MTP tdeio slave assigned to a device? Is it based on a mimetype?
Or does tdeio-mtp work as a special ioslave to find and provide all MTP
devices?
If during the device recognition in tdehw-lib there we would identify the
MTP device and set the appropriate device type and flags, this could
probably be useful?
3. as I understand the TDE library classifies the
device based on some
string in the usb.ids, but I am not exactly sure how it will classify
one device as Camera (PTP) and another as MTP.
Devices in tdehw-lib are recognized by data from udev => values visible in
sysfs and discoverable by udevadm. I tried to find out if there is
information available that the device is MTP and I found the value
ID_MTP_DEVICE=1.
So far, there doesn't seem to be any code in
tdehw-lib to recognize and
operate MTP devices.
Yes, this is why I knocked on your door.
So, it would be good to have this in tdehw-lib first and than down the whole
chain, right?
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deloptes -
Slávek Banko