include/linux/atmel-mci.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __LINUX_ATMEL_MCI_H
0003 #define __LINUX_ATMEL_MCI_H
0004
0005 #include <linux/types.h>
0006 #include <linux/dmaengine.h>
0007
0008 #define ATMCI_MAX_NR_SLOTS  2
0009
0010 /**
0011  * struct mci_slot_pdata - board-specific per-slot configuration
0012  * @bus_width: Number of data lines wired up the slot
0013  * @detect_pin: GPIO pin wired to the card detect switch
0014  * @wp_pin: GPIO pin wired to the write protect sensor
0015  * @detect_is_active_high: The state of the detect pin when it is active
0016  * @non_removable: The slot is not removable, only detect once
0017  *
0018  * If a given slot is not present on the board, @bus_width should be
0019  * set to 0. The other fields are ignored in this case.
0020  *
0021  * Any pins that aren't available should be set to a negative value.
0022  *
0023  * Note that support for multiple slots is experimental -- some cards
0024  * might get upset if we don't get the clock management exactly right.
0025  * But in most cases, it should work just fine.
0026  */
0027 struct mci_slot_pdata {
0028     unsigned int        bus_width;
0029     int         detect_pin;
0030     int         wp_pin;
0031     bool            detect_is_active_high;
0032     bool            non_removable;
0033 };
0034
0035 /**
0036  * struct mci_platform_data - board-specific MMC/SDcard configuration
0037  * @dma_slave: DMA slave interface to use in data transfers.
0038  * @slot: Per-slot configuration data.
0039  */
0040 struct mci_platform_data {
0041     void            *dma_slave;
0042     dma_filter_fn       dma_filter;
0043     struct mci_slot_pdata   slot[ATMCI_MAX_NR_SLOTS];
0044 };
0045
0046 #endif /* __LINUX_ATMEL_MCI_H */