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| author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-09-01 08:32:56 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-09-05 06:12:16 -0400 |
| commit | 5d153fb888bd9bae0802d0a8db8e1321caf4296e (patch) | |
| tree | 4a4075dddacab2f53c35b84d6bd9aba31ef8d9b5 /Documentation/media/uapi/dvb | |
| parent | 3c71bfd433b4d936dce21b5a7ed3274220669680 (diff) | |
| download | linux-5d153fb888bd9bae0802d0a8db8e1321caf4296e.tar.gz linux-5d153fb888bd9bae0802d0a8db8e1321caf4296e.tar.bz2 linux-5d153fb888bd9bae0802d0a8db8e1321caf4296e.zip | |
media: ca-get-slot-info.rst: document this ioctl
Instead of a generic boilerplate, fill it with relevant
information about this ioctl.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media/uapi/dvb')
| -rw-r--r-- | Documentation/media/uapi/dvb/ca-get-slot-info.rst | 98 |
1 files changed, 11 insertions, 87 deletions
diff --git a/Documentation/media/uapi/dvb/ca-get-slot-info.rst b/Documentation/media/uapi/dvb/ca-get-slot-info.rst index 54e5dc78a2dc..d7e41e038ca7 100644 --- a/Documentation/media/uapi/dvb/ca-get-slot-info.rst +++ b/Documentation/media/uapi/dvb/ca-get-slot-info.rst @@ -26,100 +26,24 @@ Arguments File descriptor returned by a previous call to :c:func:`open() <cec-open>`. ``info`` - Pointer to struct c:type:`ca_slot_info`. - -.. _ca_slot_info_type: - -.. flat-table:: ca_slot_info types - :header-rows: 1 - :stub-columns: 0 - - - - - type - - name - - description - - - - CA_CI - - 1 - - CI high level interface - - - - - CA_CI_LINK - - 2 - - CI link layer level interface - - - - - CA_CI_PHYS - - 4 - - CI physical layer level interface - - - - - CA_DESCR - - 8 - - built-in descrambler - - - - - CA_SC - - 128 - - simple smart card interface - -.. _ca_slot_info_flag: - -.. flat-table:: ca_slot_info flags - :header-rows: 1 - :stub-columns: 0 - - - - - type - - name - - description - - - - - CA_CI_MODULE_PRESENT - - 1 - - module (or card) inserted - - - - - CA_CI_MODULE_READY - - 2 - - - -.. c:type:: ca_slot_info - -.. flat-table:: struct ca_slot_info - :header-rows: 1 - :stub-columns: 0 - - - - - type - - name - - description - - - - - int - - num - - slot number - - - - - int - - type - - CA interface this slot supports, as defined at :ref:`ca_slot_info_type`. - - - - - unsigned int - - flags - - flags as defined at :ref:`ca_slot_info_flag`. - + Pointer to struct :c:type:`ca_slot_info`. Description ----------- -.. note:: This ioctl is undocumented. Documentation is welcome. +Returns information about a CA slot identified by +:c:type:`ca_slot_info`.slot_num. Return Value ------------ -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the +On success 0 is returned, and :c:type:`ca_slot_info` is filled. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +If the slot is not available, ``errno`` will contain ``-EINVAL``. + +The generic error codes are described at the :ref:`Generic Error Codes <gen-errors>` chapter. |