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 */