include/linux/amba/mmci.h

   1 /*
   2  *  include/linux/amba/mmci.h
   3  */
   4 #ifndef AMBA_MMCI_H
   5 #define AMBA_MMCI_H
   6
   7 #include <linux/mmc/host.h>
   8
   9 /* Just some dummy forwarding */
  10 struct dma_chan;
  11
  12 /**
  13  * struct mmci_platform_data - platform configuration for the MMCI
  14  * (also known as PL180) block.
  15  * @f_max: the maximum operational frequency for this host in this
  16  * platform configuration. When this is specified it takes precedence
  17  * over the module parameter for the same frequency.
  18  * @ocr_mask: available voltages on the 4 pins from the block, this
  19  * is ignored if a regulator is used, see the MMC_VDD_* masks in
  20  * mmc/host.h
  21  * @vdd_handler: a callback function to translate a MMC_VDD_*
  22  * mask into a value to be binary (or set some other custom bits
  23  * in MMCIPWR) or:ed and written into the MMCIPWR register of the
  24  * block.  May also control external power based on the power_mode.
  25  * @status: if no GPIO read function was given to the block in
  26  * gpio_wp (below) this function will be called to determine
  27  * whether a card is present in the MMC slot or not
  28  * @gpio_wp: read this GPIO pin to see if the card is write protected
  29  * @gpio_cd: read this GPIO pin to detect card insertion
  30  * @cd_invert: true if the gpio_cd pin value is active low
  31  * @capabilities: the capabilities of the block as implemented in
  32  * this platform, signify anything MMC_CAP_* from mmc/host.h
  33  * @capabilities2: more capabilities, MMC_CAP2_* from mmc/host.h
  34  * @dma_filter: function used to select an appropriate RX and TX
  35  * DMA channel to be used for DMA, if and only if you're deploying the
  36  * generic DMA engine
  37  * @dma_rx_param: parameter passed to the DMA allocation
  38  * filter in order to select an appropriate RX channel. If
  39  * there is a bidirectional RX+TX channel, then just specify
  40  * this and leave dma_tx_param set to NULL
  41  * @dma_tx_param: parameter passed to the DMA allocation
  42  * filter in order to select an appropriate TX channel. If this
  43  * is NULL the driver will attempt to use the RX channel as a
  44  * bidirectional channel
  45  */
  46 struct mmci_platform_data {
  47         unsigned int f_max;
  48         unsigned int ocr_mask;
  49         u32 (*vdd_handler)(struct device *, unsigned int vdd,
  50                            unsigned char power_mode);
  51         unsigned int (*status)(struct device *);
  52         int     gpio_wp;
  53         int     gpio_cd;
  54         bool    cd_invert;
  55         unsigned long capabilities;
  56         unsigned long capabilities2;
  57         bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
  58         void *dma_rx_param;
  59         void *dma_tx_param;
  60 };
  61
  62 #endif