projects / deliverable / linux.git / blame
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|---|---|---|
| 5377d91f MH |
1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _FE_SET_FRONTEND: | |
| 4 | ||
| 5 | *************** | |
| 6 | FE_SET_FRONTEND | |
| 7 | *************** | |
| 8 | ||
| 9 | DESCRIPTION | |
| 10 | ||
| 11 | This ioctl call starts a tuning operation using specified parameters. | |
| 12 | The result of this call will be successful if the parameters were valid | |
| 13 | and the tuning could be initiated. The result of the tuning operation in | |
| 14 | itself, however, will arrive asynchronously as an event (see | |
| 7347081e MCC |
15 | documentation for :ref:`FE_GET_EVENT` and |
| 16 | FrontendEvent.) If a new :ref:`FE_SET_FRONTEND` | |
| 5377d91f MH |
17 | operation is initiated before the previous one was completed, the |
| 18 | previous operation will be aborted in favor of the new one. This command | |
| 19 | requires read/write access to the device. | |
| 20 | ||
| 21 | SYNOPSIS | |
| 22 | ||
| 23 | int ioctl(int fd, int request = | |
| 7347081e | 24 | :ref:`FE_SET_FRONTEND`, struct |
| 5377d91f MH |
25 | dvb_frontend_parameters *p); |
| 26 | ||
| 27 | PARAMETERS | |
| 28 | ||
| 29 | ||
| 30 | ||
| 31 | .. flat-table:: | |
| 32 | :header-rows: 0 | |
| 33 | :stub-columns: 0 | |
| 34 | ||
| 35 | ||
| 36 | - .. row 1 | |
| 37 | ||
| 38 | - int fd | |
| 39 | ||
| 40 | - File descriptor returned by a previous call to open(). | |
| 41 | ||
| 42 | - .. row 2 | |
| 43 | ||
| 44 | - int request | |
| 45 | ||
| 7347081e | 46 | - Equals :ref:`FE_SET_FRONTEND` for this |
| 5377d91f MH |
47 | command. |
| 48 | ||
| 49 | - .. row 3 | |
| 50 | ||
| 51 | - struct dvb_frontend_parameters *p | |
| 52 | ||
| 53 | - Points to parameters for tuning operation. | |
| 54 | ||
| 55 | ||
| 56 | RETURN VALUE | |
| 57 | ||
| 58 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
| 59 | appropriately. The generic error codes are described at the | |
| 60 | :ref:`Generic Error Codes <gen-errors>` chapter. | |
| 61 | ||
| 62 | ||
| 63 | ||
| 64 | .. flat-table:: | |
| 65 | :header-rows: 0 | |
| 66 | :stub-columns: 0 | |
| 67 | ||
| 68 | ||
| 69 | - .. row 1 | |
| 70 | ||
| 71 | - EINVAL | |
| 72 | ||
| 73 | - Maximum supported symbol rate reached. | |
| 74 | ||
| 75 | ||
| 76 | ||
| 77 | ||
| 78 | .. ------------------------------------------------------------------------------ | |
| 79 | .. This file was automatically converted from DocBook-XML with the dbxml | |
| 80 | .. library (https://github.com/return42/sphkerneldoc). The origin XML comes | |
| 81 | .. from the linux kernel, refer to: | |
| 82 | .. | |
| 83 | .. * https://github.com/torvalds/linux/tree/master/Documentation/DocBook | |
| 84 | .. ------------------------------------------------------------------------------ |