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Commit e94b6d77 authored by Stefan Richter's avatar Stefan Richter
Browse files

firewire: cdev: increment ABI version number 



so that clients can detect whether the FW_CDEV_IOC_GET_CYCLE_TIMER ioctl
is reliable (on all tested controllers, especially the widely used VIA
controllers, also NEC controllers, see commits b677532b and 1c1517ef).

Also add a comment on the 2.6.32 iso xmit enhancement and on dual-buffer
IR having been disabled in 2.6.33.

Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent abfe5a01

include/linux/firewire-cdev.h

+8 −1
Original line number Diff line number Diff line
@@ -256,8 +256,12 @@ union fw_cdev_event { 
 *  1  (2.6.22)  - initial version

 *  2  (2.6.30)  - changed &fw_cdev_event_iso_interrupt.header if

 *                 &fw_cdev_create_iso_context.header_size is 8 or more

 *     (2.6.32)  - added time stamp to xmit &fw_cdev_event_iso_interrupt

 *     (2.6.33)  - IR has always packet-per-buffer semantics now, not one of

 *                 dual-buffer or packet-per-buffer depending on hardware

 *  3  (2.6.34)  - made &fw_cdev_get_cycle_timer reliable

 */

#define FW_CDEV_VERSION 2

#define FW_CDEV_VERSION 3



/**

 * struct fw_cdev_get_info - General purpose information ioctl
@@ -556,6 +560,9 @@ struct fw_cdev_stop_iso { 
 * @cycle_timer consists of 7 bits cycleSeconds, 13 bits cycleCount, and

 * 12 bits cycleOffset, in host byte order.  Cf. the Cycle Time register

 * per IEEE 1394 or Isochronous Cycle Timer register per OHCI-1394.

 *

 * In version 1 and 2 of the ABI, this ioctl returned unreliable (non-

 * monotonic) @cycle_timer values on certain controllers.

 */

struct fw_cdev_get_cycle_timer {

	__u64 local_time;