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author | Karsten Keil <keil@b1-systems.de> | 2009-04-23 02:24:21 +0000 |
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committer | David S. Miller <davem@davemloft.net> | 2009-04-27 05:37:39 -0700 |
commit | 2296e5a0136f7ba64c99f3a48a55a687aa9abcc8 (patch) | |
tree | e3eae50d49456ec8f269bbd0a4ed67a6d0d94978 /Documentation/isdn | |
parent | 554f200e22a13e19bd407d0037e41be0ec8a0a2e (diff) | |
download | kernel_samsung_tuna-2296e5a0136f7ba64c99f3a48a55a687aa9abcc8.zip kernel_samsung_tuna-2296e5a0136f7ba64c99f3a48a55a687aa9abcc8.tar.gz kernel_samsung_tuna-2296e5a0136f7ba64c99f3a48a55a687aa9abcc8.tar.bz2 |
Add reference to CAPI 2.0 standard
Move the entry about CAPI 2.0 to the beginning and add a URL.
Incorporate changes suggested by Randy Dunlap, thanks for proofreading.
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/isdn')
-rw-r--r-- | Documentation/isdn/INTERFACE.CAPI | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/Documentation/isdn/INTERFACE.CAPI b/Documentation/isdn/INTERFACE.CAPI index 8947ffc..786d619 100644 --- a/Documentation/isdn/INTERFACE.CAPI +++ b/Documentation/isdn/INTERFACE.CAPI @@ -3,6 +3,11 @@ Kernel CAPI Interface to Hardware Drivers 1. Overview +From the CAPI 2.0 specification: +COMMON-ISDN-API (CAPI) is an application programming interface standard used +to access ISDN equipment connected to basic rate interfaces (BRI) and primary +rate interfaces (PRI). + Kernel CAPI operates as a dispatching layer between CAPI applications and CAPI hardware drivers. Hardware drivers register ISDN devices (controllers, in CAPI lingo) with Kernel CAPI to indicate their readiness to provide their service @@ -12,6 +17,9 @@ application registration to an available device, forwarding it to the corresponding hardware driver. Kernel CAPI then forwards CAPI messages in both directions between the application and the hardware driver. +Format and semantics of CAPI messages are specified in the CAPI 2.0 standard. +This standard is freely available from http://www.capi.org. + 2. Driver and Device Registration @@ -53,12 +61,10 @@ open() operation on regular files or character devices. After a successful return from register_appl(), CAPI messages from the application may be passed to the driver for the device via calls to the send_message() callback function. The CAPI message to send is stored in the -data portion of a skb. Conversely, the driver may call Kernel CAPI's +data portion of an skb. Conversely, the driver may call Kernel CAPI's capi_ctr_handle_message() function to pass a received CAPI message to Kernel CAPI for forwarding to an application, specifying its ApplID. -Format and semantics of CAPI messages are specified in the CAPI 2.0 standard. - Deregistration requests (CAPI operation CAPI_RELEASE) from applications are forwarded as calls to the release_appl() callback function, passing the same ApplID as with register_appl(). After return from release_appl(), no CAPI @@ -75,9 +81,9 @@ the following non-private fields, all to be set by the driver before calling register_capi_driver(): char name[32] - the name of the driver, as a zero terminated ASCII string + the name of the driver, as a zero-terminated ASCII string char revision[32] - the revision number of the driver, as a zero terminated ASCII string + the revision number of the driver, as a zero-terminated ASCII string int (*add_card)(struct capi_driver *driver, capicardparams *data) a callback function pointer (may be NULL) @@ -100,10 +106,10 @@ void *driverdata an opaque pointer to driver specific data, not touched by Kernel CAPI char name[32] - the name of the controller, as a zero terminated ASCII string + the name of the controller, as a zero-terminated ASCII string char *driver_name - the name of the driver, as a zero terminated ASCII string + the name of the driver, as a zero-terminated ASCII string int (*load_firmware)(struct capi_ctr *ctrlr, capiloaddata *ldata) (optional) pointer to a callback function for sending firmware and |