/* SPDX-License-Identifier: GPL-2.0 */
/*
* Driver for the Synopsys DesignWare DMA Controller
*
* Copyright ( C ) 2007 Atmel Corporation
* Copyright ( C ) 2010 - 2011 ST Microelectronics
*/
#ifndef _PLATFORM_DATA_DMA_DW_H
#define _PLATFORM_DATA_DMA_DW_H
#include <linux/bits.h>
#include <linux/types.h>
#define DW_DMA_MAX_NR_MASTERS 4
#define DW_DMA_MAX_NR_CHANNELS 8
#define DW_DMA_MIN_BURST 1
#define DW_DMA_MAX_BURST 256
struct device;
/**
* 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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