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yaml --- r: 261803 b: refs/heads/master c: f0d15c9 h: refs/heads/master i: 261801: 5f51e3d 261799: a38ecf0 v: v3
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Linus Torvalds
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Jul 31, 2011
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: f8c63918c9a3004bd052fa4af08aa1cefbcd79ac | ||
| refs/heads/master: f0d15c96d4ddcf32b6f910c4c2487ee705e4d493 |
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trunk/Documentation/ABI/obsolete/sysfs-driver-hid-roccat-koneplus
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| What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/koneplus/roccatkoneplus<minor>/startup_profile | ||
| Date: October 2010 | ||
| Contact: Stefan Achatz <erazor_de@users.sourceforge.net> | ||
| Description: The integer value of this attribute ranges from 0-4. | ||
| When read, this attribute returns the number of the actual | ||
| profile. This value is persistent, so its equivalent to the | ||
| profile that's active when the mouse is powered on next time. | ||
| When written, this file sets the number of the startup profile | ||
| and the mouse activates this profile immediately. | ||
| Please use actual_profile, it does the same thing. |
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| What: /sys/o2cb symlink | ||
| Date: May 2011 | ||
| KernelVersion: 2.6.40 | ||
| Contact: ocfs2-devel@oss.oracle.com | ||
| Description: This is a symlink: /sys/o2cb to /sys/fs/o2cb. The symlink is | ||
| removed when new versions of ocfs2-tools which know to look | ||
| in /sys/fs/o2cb are sufficiently prevalent. Don't code new | ||
| software to look here, it should try /sys/fs/o2cb instead. | ||
| Users: ocfs2-tools. It's sufficient to mail proposed changes to | ||
| ocfs2-devel@oss.oracle.com. |
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| What: /dev/fw[0-9]+ | ||
| Date: May 2007 | ||
| KernelVersion: 2.6.22 | ||
| Contact: linux1394-devel@lists.sourceforge.net | ||
| Description: | ||
| The character device files /dev/fw* are the interface between | ||
| firewire-core and IEEE 1394 device drivers implemented in | ||
| userspace. The ioctl(2)- and read(2)-based ABI is defined and | ||
| documented in <linux/firewire-cdev.h>. | ||
|
|
||
| This ABI offers most of the features which firewire-core also | ||
| exposes to kernelspace IEEE 1394 drivers. | ||
|
|
||
| Each /dev/fw* is associated with one IEEE 1394 node, which can | ||
| be remote or local nodes. Operations on a /dev/fw* file have | ||
| different scope: | ||
| - The 1394 node which is associated with the file: | ||
| - Asynchronous request transmission | ||
| - Get the Configuration ROM | ||
| - Query node ID | ||
| - Query maximum speed of the path between this node | ||
| and local node | ||
| - The 1394 bus (i.e. "card") to which the node is attached to: | ||
| - Isochronous stream transmission and reception | ||
| - Asynchronous stream transmission and reception | ||
| - Asynchronous broadcast request transmission | ||
| - PHY packet transmission and reception | ||
| - Allocate, reallocate, deallocate isochronous | ||
| resources (channels, bandwidth) at the bus's IRM | ||
| - Query node IDs of local node, root node, IRM, bus | ||
| manager | ||
| - Query cycle time | ||
| - Bus reset initiation, bus reset event reception | ||
| - All 1394 buses: | ||
| - Allocation of IEEE 1212 address ranges on the local | ||
| link layers, reception of inbound requests to such | ||
| an address range, asynchronous response transmission | ||
| to inbound requests | ||
| - Addition of descriptors or directories to the local | ||
| nodes' Configuration ROM | ||
|
|
||
| Due to the different scope of operations and in order to let | ||
| userland implement different access permission models, some | ||
| operations are restricted to /dev/fw* files that are associated | ||
| with a local node: | ||
| - Addition of descriptors or directories to the local | ||
| nodes' Configuration ROM | ||
| - PHY packet transmission and reception | ||
|
|
||
| A /dev/fw* file remains associated with one particular node | ||
| during its entire life time. Bus topology changes, and hence | ||
| node ID changes, are tracked by firewire-core. ABI users do not | ||
| need to be aware of topology. | ||
|
|
||
| The following file operations are supported: | ||
|
|
||
| open(2) | ||
| Currently the only useful flags are O_RDWR. | ||
|
|
||
| ioctl(2) | ||
| Initiate various actions. Some take immediate effect, others | ||
| are performed asynchronously while or after the ioctl returns. | ||
| See the inline documentation in <linux/firewire-cdev.h> for | ||
| descriptions of all ioctls. | ||
|
|
||
| poll(2), select(2), epoll_wait(2) etc. | ||
| Watch for events to become available to be read. | ||
|
|
||
| read(2) | ||
| Receive various events. There are solicited events like | ||
| outbound asynchronous transaction completion or isochronous | ||
| buffer completion, and unsolicited events such as bus resets, | ||
| request reception, or PHY packet reception. Always use a read | ||
| buffer which is large enough to receive the largest event that | ||
| could ever arrive. See <linux/firewire-cdev.h> for descriptions | ||
| of all event types and for which ioctls affect reception of | ||
| events. | ||
|
|
||
| mmap(2) | ||
| Allocate a DMA buffer for isochronous reception or transmission | ||
| and map it into the process address space. The arguments should | ||
| be used as follows: addr = NULL, length = the desired buffer | ||
| size, i.e. number of packets times size of largest packet, | ||
| prot = at least PROT_READ for reception and at least PROT_WRITE | ||
| for transmission, flags = MAP_SHARED, fd = the handle to the | ||
| /dev/fw*, offset = 0. | ||
|
|
||
| Isochronous reception works in packet-per-buffer fashion except | ||
| for multichannel reception which works in buffer-fill mode. | ||
|
|
||
| munmap(2) | ||
| Unmap the isochronous I/O buffer from the process address space. | ||
|
|
||
| close(2) | ||
| Besides stopping and freeing I/O contexts that were associated | ||
| with the file descriptor, back out any changes to the local | ||
| nodes' Configuration ROM. Deallocate isochronous channels and | ||
| bandwidth at the IRM that were marked for kernel-assisted | ||
| re- and deallocation. | ||
|
|
||
| Users: libraw1394 | ||
| libdc1394 | ||
| tools like jujuutils, fwhack, ... |
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