Current File : //lib/modules/3.10.0-957.21.3.el7.centos.plus.x86_64/source/include/linux/amba/mmci.h
/*
* include/linux/amba/mmci.h
*/
#ifndef AMBA_MMCI_H
#define AMBA_MMCI_H
#include <linux/mmc/host.h>
/*
* These defines is places here due to access is needed from machine
* configuration files. The ST Micro version does not have ROD and
* reuse the voltage registers for direction settings.
*/
#define MCI_ST_DATA2DIREN (1 << 2)
#define MCI_ST_CMDDIREN (1 << 3)
#define MCI_ST_DATA0DIREN (1 << 4)
#define MCI_ST_DATA31DIREN (1 << 5)
#define MCI_ST_FBCLKEN (1 << 7)
#define MCI_ST_DATA74DIREN (1 << 8)
/* Just some dummy forwarding */
struct dma_chan;
/**
* struct mmci_platform_data - platform configuration for the MMCI
* (also known as PL180) block.
* @f_max: the maximum operational frequency for this host in this
* platform configuration. When this is specified it takes precedence
* over the module parameter for the same frequency.
* @ocr_mask: available voltages on the 4 pins from the block, this
* is ignored if a regulator is used, see the MMC_VDD_* masks in
* mmc/host.h
* @ios_handler: a callback function to act on specfic ios changes,
* used for example to control a levelshifter
* mask into a value to be binary (or set some other custom bits
* in MMCIPWR) or:ed and written into the MMCIPWR register of the
* block. May also control external power based on the power_mode.
* @status: if no GPIO read function was given to the block in
* gpio_wp (below) this function will be called to determine
* whether a card is present in the MMC slot or not
* @gpio_wp: read this GPIO pin to see if the card is write protected
* @gpio_cd: read this GPIO pin to detect card insertion
* @cd_invert: true if the gpio_cd pin value is active low
* @capabilities: the capabilities of the block as implemented in
* this platform, signify anything MMC_CAP_* from mmc/host.h
* @capabilities2: more capabilities, MMC_CAP2_* from mmc/host.h
* @sigdir: a bit field indicating for what bits in the MMC bus the host
* should enable signal direction indication.
* @dma_filter: function used to select an appropriate RX and TX
* DMA channel to be used for DMA, if and only if you're deploying the
* generic DMA engine
* @dma_rx_param: parameter passed to the DMA allocation
* filter in order to select an appropriate RX channel. If
* there is a bidirectional RX+TX channel, then just specify
* this and leave dma_tx_param set to NULL
* @dma_tx_param: parameter passed to the DMA allocation
* filter in order to select an appropriate TX channel. If this
* is NULL the driver will attempt to use the RX channel as a
* bidirectional channel
*/
struct mmci_platform_data {
unsigned int f_max;
unsigned int ocr_mask;
int (*ios_handler)(struct device *, struct mmc_ios *);
unsigned int (*status)(struct device *);
int gpio_wp;
int gpio_cd;
bool cd_invert;
unsigned long capabilities;
unsigned long capabilities2;
u32 sigdir;
bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
void *dma_rx_param;
void *dma_tx_param;
};
#endif
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