/** * struct dw_dma_slave - Controller-specific information about a slave * * @dma_dev: required DMA master device * @src_id: src request line * @dst_id: dst request line * @m_master: memory master for transfers on allocated channel * @p_master: peripheral master for transfers on allocated channel * @channels: mask of the channels permitted for allocation (zero value means any) * @hs_polarity:set active low polarity of handshake interface
*/ struct dw_dma_slave { struct device *dma_dev;
u8 src_id;
u8 dst_id;
u8 m_master;
u8 p_master;
u8 channels; bool hs_polarity;
};
/** * struct dw_dma_platform_data - Controller configuration parameters * @nr_masters: Number of AHB masters supported by the controller * @nr_channels: Number of channels supported by hardware (max 8) * @chan_allocation_order: Allocate channels starting from 0 or 7 * @chan_priority: Set channel priority increasing from 0 to 7 or 7 to 0. * @block_size: Maximum block size supported by the controller * @data_width: Maximum data width supported by hardware per AHB master * (in bytes, power of 2) * @multi_block: Multi block transfers supported by hardware per channel. * @max_burst: Maximum value of burst transaction size supported by hardware * per channel (in units of CTL.SRC_TR_WIDTH/CTL.DST_TR_WIDTH). * @protctl: Protection control signals setting per channel. * @quirks: Optional platform quirks.
*/ struct dw_dma_platform_data {
u32 nr_masters;
u32 nr_channels; #define CHAN_ALLOCATION_ASCENDING 0 /* zero to seven */ #define CHAN_ALLOCATION_DESCENDING 1 /* seven to zero */
u32 chan_allocation_order; #define CHAN_PRIORITY_ASCENDING 0 /* chan0 highest */ #define CHAN_PRIORITY_DESCENDING 1 /* chan7 highest */
u32 chan_priority;
u32 block_size;
u32 data_width[DW_DMA_MAX_NR_MASTERS];
u32 multi_block[DW_DMA_MAX_NR_CHANNELS];
u32 max_burst[DW_DMA_MAX_NR_CHANNELS]; #define CHAN_PROTCTL_PRIVILEGED BIT(0) #define CHAN_PROTCTL_BUFFERABLE BIT(1) #define CHAN_PROTCTL_CACHEABLE BIT(2) #define CHAN_PROTCTL_MASK GENMASK(2, 0)
u32 protctl; #define DW_DMA_QUIRK_XBAR_PRESENT BIT(0)
u32 quirks;
};
#endif/* _PLATFORM_DATA_DMA_DW_H */
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