1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LINUX_ATMEL_MCI_H 3 #define __LINUX_ATMEL_MCI_H 4 5 #include <linux/types.h> 6 #include <linux/dmaengine.h> 7 8 #define ATMCI_MAX_NR_SLOTS 2 9 10 /** 11 * struct mci_slot_pdata - board-specific per-slot configuration 12 * @bus_width: Number of data lines wired up the slot 13 * @detect_pin: GPIO pin wired to the card detect switch 14 * @wp_pin: GPIO pin wired to the write protect sensor 15 * @detect_is_active_high: The state of the detect pin when it is active 16 * @non_removable: The slot is not removable, only detect once 17 * 18 * If a given slot is not present on the board, @bus_width should be 19 * set to 0. The other fields are ignored in this case. 20 * 21 * Any pins that aren't available should be set to a negative value. 22 * 23 * Note that support for multiple slots is experimental -- some cards 24 * might get upset if we don't get the clock management exactly right. 25 * But in most cases, it should work just fine. 26 */ 27 struct mci_slot_pdata { 28 unsigned int bus_width; 29 int detect_pin; 30 int wp_pin; 31 bool detect_is_active_high; 32 bool non_removable; 33 }; 34 35 /** 36 * struct mci_platform_data - board-specific MMC/SDcard configuration 37 * @dma_slave: DMA slave interface to use in data transfers. 38 * @slot: Per-slot configuration data. 39 */ 40 struct mci_platform_data { 41 void *dma_slave; 42 dma_filter_fn dma_filter; 43 struct mci_slot_pdata slot[ATMCI_MAX_NR_SLOTS]; 44 }; 45 46 #endif /* __LINUX_ATMEL_MCI_H */ 47