SDSetCardFeature

Other versions of this page are also available for the following:

• Windows Embedded CE 6.0 R3

8/28/2008

This function sets various SDIO card features in a thread-safe manner.

Syntax

SD_API_STATUS SDSetCardFeature(
  SD_DEVICE_HANDLE hDevice,
  SD_SET_FEATURE_TYPE CardFeature,
  PVOID pCardInfo,
  ULONG StructureSize
);

Parameters

• hDevice
  [in] Handle to an SD bus device.

• CardFeature
  [in] Card feature to set.

• pCardInfo
  [in] Buffer containing new data for the feature.

• StructureSize
  [in] Size of the pCardInfo structure.

The following table shows the possible values for the CardFeature and pCardInfo parameters.

CardFeature value	Description
SD_IO_FUNCTION_ENABLE	Enables the current function. The SD_IO_FUNCTION_ENABLE_INFO value defines a retry interval and maximum retry count to check for correct function activation.
SD_IO_FUNCTION_DISABLE	Disables the current function.
SD_IO_FUNCTION_SET_BLOCK_SIZE	Sets the block size for the IO_RW_EXTENDED command.
SD_SET_DATA_TRANSFER_CLOCKS	Sets the current read/write data access delay used by a host controller driver when calculating an appropriate read or write data timeout. This value is optional, and a client driver can rely on the host controller driver to implement proper timeouts.
SD_SET_CARD_INTERFACE	Allows a client driver to set the bus width and clock rate for a card. The client driver should first query the host interface capabilities The ClockRate field will be modified by the host controller driver to reflect the actual clock rate used. The client driver should not assume that it can set an exact clock rate.
SD_SET_CLOCK_STATE_DURING_IDLE	Sets the clock state during the idle state.
SD_IS_SOFT_BLOCK_AVAILABLE	Determines if Soft-Block is available in the SD bus driver.
SD_SOFT_BLOCK_FORCE_UTILIZATION	Always use Soft-Block. This value is for testing purposes only.
SD_SOFT_BLOCK_DEFAULT_UTILIZATION	Always use hardware multi-block operation if supported by the card, otherwise use Soft-Block.
SD_CARD_SELECT_REQUEST	Requests the card to be selected.
SD_CARD_DESELECT_REQUEST	Requests the card to be deselected.
SD_CARD_FORCE_RESET	Forces the card to be reset.
SD_IS_FAST_PATH_AVAILABLE	Determines if Fast-Path is available in the SD bus driver.
SD_FAST_PATH_DISABLE	Disables the use of Fast-Path. This value is for testing purposes only.
SD_FAST_PATH_ENABLE	Enables the use of Fast-Path.
SD_IO_FUNCTION_HIGH_POWER	Selects high power mode for function.
SD_IO_FUNCTION_LOW_POWER	Selects low power mode for function.
SD_INFO_POWER_CONTROL_STATE	Retrieves the power state of a function.
SD_SET_CARD_INTERFACE_EX	Applies to Windows Embedded CE 6.0 R2 Allows a client driver to set the bus width, clock rate, and enable high speed for a card. The client driver should first query the host interface capabilities. The ClockRate field will be modified by the host controller driver to reflect the actual clock rate used. The client driver should not assume that it can set an exact clock rate. Note that this value is an extension for SD_CARD_INTERFACE.
SD_SET_SWITCH_FUNCTION	Applies to Windows Embedded CE 6.0 R2 Sets the SD card switch function.
SD_DMA_ALLOC_PHYS_MEM	Applies to Windows Embedded CE 6.0 R2 Allows a client driver to allocate a physical buffer with the given size and to take advantage of using direct memory access (DMA).
SD_DMA_FREE_PHYS_MEM	Applies to Windows Embedded CE 6.0 R2 Allows a client driver to free the DMA buffer that was allocated using SD_DMA_ALLOC_PHYS_MEM.

Return Value

A return value of type SD_API_STATUS indicates the success or failure.

Remarks

This function is provided to set various SDIO card features in a thread-safe manner. SDIO cards utilize shared register sets between functions. This requires that the register state be preserved between functions that can be controlled in separate thread contexts. This function can block by issuing synchronous bus request.

Note

This function must not be called from a bus request callback.

Requirements

Header	sdcardddk.h
Library	sdcardlib.lib
Windows Embedded CE	Windows CE 5.0 and later

See Also

Reference

Secure Digital Card Driver Functions