sys-spi.h

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/* SPDX-License-Identifier: GPL-2.0+ */
 
#ifndef __SYS_SPI_H__
#define __SYS_SPI_H__
 
#include <io.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <types.h>
 
#include <sys-clk.h>
#include <sys-dma.h>
#include <sys-gpio.h>
 
#include <log.h>
 
#include <reg-spi.h>
 
#ifdef __cplusplus
extern "C" {
#endif// __cplusplus
 
typedef enum {
    SPI_IO_SINGLE = 0x00, 
    SPI_IO_DUAL_RX,       
    SPI_IO_QUAD_RX,       
    SPI_IO_QUAD_IO,       
} spi_io_mode_t;
 
typedef enum {
    SPI_LOW_FREQUENCY = 24000000,  
    SPI_MOD_FREQUENCY = 50000000,  
    SPI_HIGH_FREQUENCY = 60000000, 
    SPI_MAX_FREQUENCY = 100000000, 
} spi_speed_mode_t;
 
typedef enum {
    SPI_CDR1_MODE = 0, 
    SPI_CDR2_MODE = 1, 
    SPI_CDR_NONE = 2,  
} spi_clk_cdr_mode_t;
 
typedef struct {
    gpio_mux_t gpio_cs;   
    gpio_mux_t gpio_sck;  
    gpio_mux_t gpio_miso; 
    gpio_mux_t gpio_mosi; 
    gpio_mux_t gpio_wp;   
    gpio_mux_t gpio_hold; 
} sunxi_spi_gpio_t;
 
typedef struct {
    uint32_t spi_clock_cfg_base;        
    uint32_t spi_clock_source;          
    uint32_t spi_clock_factor_n_offset; 
    uint32_t spi_clock_freq;            
    spi_clk_cdr_mode_t cdr_mode;        
} sunxi_spi_clk_t;
 
typedef struct {
    uint32_t base;              
    uint8_t id;                 
    uint32_t clk_rate;          
    sunxi_spi_gpio_t gpio;      
    sunxi_dma_t *dma_handle;    
    sunxi_clk_t parent_clk_reg; 
    sunxi_spi_clk_t spi_clk;    
} sunxi_spi_t;
 
#define MAX_FIFU (64)                          
#define SPI_CLK_SEL_PERIPH_300M (0x1)          
#define SPI_CLK_SEL_PERIPH_200M (0x2)          
#define SPI_CLK_SEL_FACTOR_N_OFF (8)           
#define SPI_DEFAULT_CLK_RST_OFFSET(x) (x + 16) 
#define SPI_DEFAULT_CLK_GATE_OFFSET(x) (x)     
int sunxi_spi_init(sunxi_spi_t *spi);
 
void sunxi_spi_disable(sunxi_spi_t *spi);
 
int sunxi_spi_update_clk(sunxi_spi_t *spi, uint32_t clk);
 
int sunxi_spi_transfer(sunxi_spi_t *spi, spi_io_mode_t mode, void *txbuf, uint32_t txlen, void *rxbuf, uint32_t rxlen);
 
 
#ifdef __cplusplus
}
#endif// __cplusplus
 
#endif