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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/include/linux/amba/mmci.h
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/*

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 *  include/linux/amba/mmci.h

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 */

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#ifndef AMBA_MMCI_H

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#define AMBA_MMCI_H

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#include <linux/mmc/host.h>

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/* Just some dummy forwarding */

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struct dma_chan;

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/**

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 * struct mmci_platform_data - platform configuration for the MMCI

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 * (also known as PL180) block.

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 * @f_max: the maximum operational frequency for this host in this

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 * platform configuration. When this is specified it takes precedence

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 * over the module parameter for the same frequency.

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 * @ocr_mask: available voltages on the 4 pins from the block, this

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 * is ignored if a regulator is used, see the MMC_VDD_* masks in

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 * mmc/host.h

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 * @vdd_handler: a callback function to translate a MMC_VDD_*

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 * mask into a value to be binary (or set some other custom bits

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 * in MMCIPWR) or:ed and written into the MMCIPWR register of the

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 * block.  May also control external power based on the power_mode.

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 * @status: if no GPIO read function was given to the block in

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 * gpio_wp (below) this function will be called to determine

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 * whether a card is present in the MMC slot or not

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 * @gpio_wp: read this GPIO pin to see if the card is write protected

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 * @gpio_cd: read this GPIO pin to detect card insertion

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 * @cd_invert: true if the gpio_cd pin value is active low

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 * @capabilities: the capabilities of the block as implemented in

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 * this platform, signify anything MMC_CAP_* from mmc/host.h

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 * @dma_filter: function used to select an appropriate RX and TX

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 * DMA channel to be used for DMA, if and only if you're deploying the

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 * generic DMA engine

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 * @dma_rx_param: parameter passed to the DMA allocation

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 * filter in order to select an appropriate RX channel. If

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 * there is a bidirectional RX+TX channel, then just specify

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 * this and leave dma_tx_param set to NULL

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 * @dma_tx_param: parameter passed to the DMA allocation

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 * filter in order to select an appropriate TX channel. If this

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 * is NULL the driver will attempt to use the RX channel as a

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 * bidirectional channel

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 */

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struct mmci_platform_data {

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	unsigned int f_max;

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	unsigned int ocr_mask;

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	u32 (*vdd_handler)(struct device *, unsigned int vdd,

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			   unsigned char power_mode);

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	unsigned int (*status)(struct device *);

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	int	gpio_wp;

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	int	gpio_cd;

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	bool	cd_invert;

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	unsigned long capabilities;

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	bool (*dma_filter)(struct dma_chan *chan, void *filter_param);

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	void *dma_rx_param;

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	void *dma_tx_param;

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};

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#endif

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