axi_dmac.h

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/***************************************************************************/
#ifndef AXI_DMAC_H_
#define AXI_DMAC_H_
 
/******************************************************************************/
/***************************** Include Files **********************************/
/******************************************************************************/
#include <stdint.h>
#include "no_os_util.h"
 
/******************************************************************************/
/********************** Macros and Constants Definitions **********************/
/******************************************************************************/
#define AXI_DMAC_REG_IRQ_MASK       0x80
#define AXI_DMAC_REG_IRQ_PENDING    0x84
#define AXI_DMAC_IRQ_SOT            NO_OS_BIT(0)
#define AXI_DMAC_IRQ_EOT            NO_OS_BIT(1)
 
#define AXI_DMAC_REG_INTF_DESC      0x010
#define AXI_DMAC_DMA_TYPE_DEST      NO_OS_GENMASK(5,4)
#define AXI_DMAC_DMA_TYPE_SRC       NO_OS_GENMASK(13,12)
//Define macro for src and dest
 
#define AXI_DMAC_REG_CTRL           0x400
#define AXI_DMAC_CTRL_ENABLE        NO_OS_BIT(0)
#define AXI_DMAC_CTRL_DISABLE       0u
#define AXI_DMAC_CTRL_PAUSE         NO_OS_BIT(1)
 
#define AXI_DMAC_REG_TRANSFER_ID        0x404
#define AXI_DMAC_REG_TRANSFER_SUBMIT    0x408
#define AXI_DMAC_TRANSFER_SUBMIT        NO_OS_BIT(0)
#define AXI_DMAC_QUEUE_FULL             NO_OS_BIT(0)
#define AXI_DMAC_REG_FLAGS              0x40c
#define AXI_DMAC_REG_DEST_ADDRESS       0x410
#define AXI_DMAC_REG_SRC_ADDRESS        0x414
#define AXI_DMAC_REG_X_LENGTH           0x418
#define AXI_DMAC_REG_Y_LENGTH           0x41c
#define AXI_DMAC_REG_DEST_STRIDE        0x420
#define AXI_DMAC_REG_SRC_STRIDE         0x424
#define AXI_DMAC_REG_TRANSFER_DONE      0x428
 
/******************************************************************************/
/*************************** Types Declarations *******************************/
/******************************************************************************/
enum use_irq {
    IRQ_DISABLED = 0,
    IRQ_ENABLED = 1
};
 
enum dma_direction {
    INVALID_DIR = 0,
    DMA_DEV_TO_MEM = 1,
    DMA_MEM_TO_DEV = 2,
    DMA_MEM_TO_MEM = 3
};
 
enum dma_flags {
    DMA_CYCLIC = 1,
    DMA_LAST = 2,
    DMA_PARTIAL_REPORTING_EN = 4
};
 
// Could be transformed to a bool
enum cyclic_transfer {
    NO = 0,
    CYCLIC = 1
};
 
struct axi_dma_transfer {
    uint32_t size;
    volatile bool transfer_done;
    enum cyclic_transfer cyclic;
    uint32_t src_addr;
    uint32_t dest_addr;
};
 
struct axi_dmac {
    const char *name;
    uint32_t base;
    enum use_irq irq_option;
    enum dma_direction direction;
    bool hw_cyclic;
    uint32_t max_length;
    volatile struct axi_dma_transfer transfer;
    //Current sub-transfer properties
    uint32_t init_addr;
    uint32_t remaining_size;
    uint32_t next_src_addr;
    uint32_t next_dest_addr;
};
 
struct axi_dmac_init {
    const char *name;
    uint32_t base;
    enum use_irq irq_option;
};
 
/******************************************************************************/
/************************ Functions Declarations ******************************/
/******************************************************************************/
void axi_dmac_dev_to_mem_isr(void *instance);
void axi_dmac_mem_to_dev_isr(void *instance);
void axi_dmac_mem_to_mem_isr(void *instance);
void axi_dmac_write_isr(void *instance);
int32_t axi_dmac_read(struct axi_dmac *dmac, uint32_t reg_addr,
              uint32_t *reg_data);
int32_t axi_dmac_write(struct axi_dmac *dmac, uint32_t reg_addr,
               uint32_t reg_data);
int32_t axi_dmac_is_transfer_ready(struct axi_dmac *dmac, bool *rdy);
int32_t axi_dmac_init(struct axi_dmac **adc_core,
              const struct axi_dmac_init *init);
int32_t axi_dmac_remove(struct axi_dmac *dmac);
int32_t axi_dmac_transfer_start(struct axi_dmac *dmac,
                struct axi_dma_transfer *dma_transfer);
int32_t axi_dmac_transfer_wait_completion(struct axi_dmac *dmac,
        uint32_t timeout_ms);
void axi_dmac_transfer_stop(struct axi_dmac *dmac);
 
#endif