79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
#ifndef _SPI_INTERFACE_H_
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#define _SPI_INTERFACE_H_
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#include "typedef.h"
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#include "generic/ioctl.h"
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/*enum spi_mode {
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SPI_2WIRE_MODE,
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SPI_ODD_MODE,
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SPI_DUAL_MODE,
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SPI_QUAD_MODE,
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};*/
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enum spi_mode {
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SPI_MODE_BIDIR_1BIT, //支持SPIx(x=0,1,2)，全双工，di接收，do发送
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SPI_MODE_UNIDIR_1BIT, //支持SPIx(x=0,1,2)，半双工，do分时发送/接收
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SPI_MODE_UNIDIR_2BIT, //支持SPIx(x=0)，半双工，di & do共2bit分时发送/接收
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SPI_MODE_UNIDIR_4BIT, //支持SPIx(x=0)，半双工，di & do & d2 & d3共4bit分时发送/接收
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};
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enum {
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SPI0,
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SPI1,
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SPI2,
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SPI_MAX_HW_NUM,
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};
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#define SPI_MAX_IO_GROUP 2
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struct spi_io {
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u8 cs_pin;
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u8 di_pin;
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u8 do_pin;
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u8 clk_pin;
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u8 d2_pin;
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u8 d3_pin;
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};
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struct spi_io_mapping {
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u32 num; //可选端口数量
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struct spi_io io[SPI_MAX_IO_GROUP];
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};
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enum spi_role {
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SPI_ROLE_MASTER,
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SPI_ROLE_SLAVE,
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};
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struct spi_platform_data {
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u8 port; //端口，可选'A', 'B'，'C'
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u8 mode; //模式，选项为enum spi_mode中的枚举常量
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u8 role; //角色，选项为enum spi_role中的枚举常量
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u32 clk; //波特率
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};
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extern const struct spi_platform_data spi0_p_data;
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extern const struct spi_platform_data spi1_p_data;
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extern const struct spi_platform_data spi2_p_data;
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typedef const int spi_dev;
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int spi_open(spi_dev spi);
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int spi_dma_recv(spi_dev spi, void *buf, u32 len);
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int spi_dma_send(spi_dev spi, const void *buf, u32 len);
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void spi_dma_set_addr_for_isr(spi_dev spi, void *buf, u32 len, u8 rw);
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void spi_set_ie(spi_dev spi, u8 en);
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u8 spi_get_pending(spi_dev spi);
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void spi_clear_pending(spi_dev spi);
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void spi_set_bit_mode(spi_dev spi, int mode);
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u8 spi_recv_byte(spi_dev spi, int *err);
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u8 spi_recv_byte_for_isr(spi_dev spi);
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int spi_send_byte(spi_dev spi, u8 byte);
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void spi_send_byte_for_isr(spi_dev spi, u8 byte);
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u8 spi_send_recv_byte(spi_dev spi, u8 byte, int *err);
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int spi_set_baud(spi_dev spi, u32 baud);
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u32 spi_get_baud(spi_dev spi);
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void spi_close(spi_dev spi);
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#endif
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