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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
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#define __LINUX_ATMEL_MCI_H
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#define ATMEL_MCI_MAX_NR_SLOTS 2
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/**
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* struct mci_slot_pdata - board-specific per-slot configuration
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* @bus_width: Number of data lines wired up the slot
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* @detect_pin: GPIO pin wired to the card detect switch
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* @wp_pin: GPIO pin wired to the write protect sensor
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* @detect_is_active_high: The state of the detect pin when it is active
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*
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* If a given slot is not present on the board, @bus_width should be
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* set to 0. The other fields are ignored in this case.
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*
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* Any pins that aren't available should be set to a negative value.
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*
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* Note that support for multiple slots is experimental -- some cards
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* might get upset if we don't get the clock management exactly right.
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* But in most cases, it should work just fine.
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*/
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struct mci_slot_pdata {
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unsigned int bus_width;
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int detect_pin;
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int wp_pin;
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bool detect_is_active_high;
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};
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/**
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* struct mci_platform_data - board-specific MMC/SDcard configuration
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* @dma_slave: DMA slave interface to use in data transfers.
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* @slot: Per-slot configuration data.
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*/
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struct mci_platform_data {
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struct mci_dma_data *dma_slave;
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struct mci_slot_pdata slot[ATMEL_MCI_MAX_NR_SLOTS];
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};
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#endif /* __LINUX_ATMEL_MCI_H */
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