include/linux/atmel-mci.h

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