mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
2635d1ba71
Allow the use of another DMA controller driver in atmel-mci sd/mmc driver. This adds a generic dma_slave pointer to the mci platform structure where we can store DMA controller information. In atmel-mci we use information provided by this structure to initialize the driver (with new helper functions that are architecture dependant). This also adds at32/avr32 chip modifications to cope with this new access method. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
#ifndef __LINUX_ATMEL_MCI_H
|
|
#define __LINUX_ATMEL_MCI_H
|
|
|
|
#define ATMEL_MCI_MAX_NR_SLOTS 2
|
|
|
|
/**
|
|
* struct mci_slot_pdata - board-specific per-slot configuration
|
|
* @bus_width: Number of data lines wired up the slot
|
|
* @detect_pin: GPIO pin wired to the card detect switch
|
|
* @wp_pin: GPIO pin wired to the write protect sensor
|
|
* @detect_is_active_high: The state of the detect pin when it is active
|
|
*
|
|
* If a given slot is not present on the board, @bus_width should be
|
|
* set to 0. The other fields are ignored in this case.
|
|
*
|
|
* Any pins that aren't available should be set to a negative value.
|
|
*
|
|
* Note that support for multiple slots is experimental -- some cards
|
|
* might get upset if we don't get the clock management exactly right.
|
|
* But in most cases, it should work just fine.
|
|
*/
|
|
struct mci_slot_pdata {
|
|
unsigned int bus_width;
|
|
int detect_pin;
|
|
int wp_pin;
|
|
bool detect_is_active_high;
|
|
};
|
|
|
|
/**
|
|
* struct mci_platform_data - board-specific MMC/SDcard configuration
|
|
* @dma_slave: DMA slave interface to use in data transfers.
|
|
* @slot: Per-slot configuration data.
|
|
*/
|
|
struct mci_platform_data {
|
|
struct mci_dma_data *dma_slave;
|
|
struct mci_slot_pdata slot[ATMEL_MCI_MAX_NR_SLOTS];
|
|
};
|
|
|
|
#endif /* __LINUX_ATMEL_MCI_H */
|