SDIO_Control 6 (changes)
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SDIODriver
» SWI Calls
» SDIO_Control
» SDIO_Control 6
SDIO_Control 6
(SWI &59001)
| Entry | |
|---|---|
| R0 | 6 (reason code) |
| R1 | Bits 0 – 7 = slot number |
| Bits 8 – 15 = bus number |
| Exit | |
|---|---|
| - | - |
Use
This SWI is used to poll card detection.
Re-entrancy
This SWI is re-entrant.
Notes
With hardware that has a functional card detect line, SDIODriver polls the hardware at regular intervals to determine whether a card is inserted. However, it is possible that if you have an operation ongoing when a card is removed that the operation will return an error before SDIODriver does its polling and has chance to issue Service_SDIOUnitDetached. Therefore this SWI gives you a mechanism to force an extra poll (and therefore trigger any outstanding service calls) so you can determine whether the error was caused by the card having been removed.
See also
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