109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
#ifndef _EMI_H_
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#define _EMI_H_
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#include "device.h"
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#include "generic/typedef.h"
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#include "generic/list.h"
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#include "device/gpio.h"
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#include "generic/atomic.h"
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#include "generic/ioctl.h"
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#include "device/ioctl_cmds.h"
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#include "os/os_api.h"
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//bits_mode:8bit/16bit/32bit模式配置
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#define EMI_8BITS_MODE 0
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#define EMI_16BITS_MODE 1
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#define EMI_32BITS_MODE 2
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//emi_wr colection:写极性边沿
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#define EMI_RISING_COLT 0 //上升沿
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#define EMI_FALLING_COLT 1 //下降沿
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//th:是否使用减半周期
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#define EMI_TWIDTH_NO_HALF 0
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#define EMI_TWIDTH_HALF 1
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/*
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timing_setup(ts) timing_half(th) timing_width(tw):数据传输配置
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写时钟信号:
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__________ _________
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wr =0: ____________| |_____________| |__________
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wr =1: ____________ _____________ __________
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|__________| |_________|
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数据信号:
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________________________ ______
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data: _____| |_____________________|
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ts,tw: | | | |
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|<-ts->|<---tw--->| |
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|<---hsb/(baudrate+1)--->|
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ts:0-255,ts个hsb时钟宽度
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tw:0-255,tw个hsb时钟宽度
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th:0-1,0-->tw:wr不减少半个hsb时钟周期，1-->tw:wr减少半个hsb时钟周期
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*/
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#define EMI_MAGIC 'E'
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#define EMI_SET_ISR_CB _IOW(EMI_MAGIC,1,u32)
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#define EMI_USE_SEND_SEM _IO(EMI_MAGIC,2)
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#define IOCTL_EMI_WRITE_NON_BLOCK _IOW(EMI_MAGIC,3,u32)
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#define IOCTL_EMI_WRITE_NON_BLOCK_FLUSH _IOW(EMI_MAGIC,4,u32)
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#define EMI_SET_WRITE_TIMER_OUT _IOW(EMI_MAGIC,5,u32)
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#define IOCTL_EMI_GET_NON_BLOCK _IOR(EMI_MAGIC,6,u32)
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//baudrate:EMI波特率，hsb的分频
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enum EMI_BAUD {
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EMI_BAUD_DIV2 = 1,
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EMI_BAUD_DIV3 = 2,
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EMI_BAUD_DIV4 = 3,
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EMI_BAUD_DIV5 = 4,
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EMI_BAUD_DIV6 = 5,
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EMI_BAUD_DIV7 = 6,
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EMI_BAUD_DIV8 = 7,
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EMI_BAUD_DIV10 = 9,
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EMI_BAUD_DIV16 = 15,
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EMI_BAUD_DIV32 = 31,
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EMI_BAUD_DIV64 = 63,
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EMI_BAUD_DIV128 = 127,
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EMI_BAUD_DIV256 = 255,
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};
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struct emi_platform_data {
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u8 baudrate;//emi_clk = hsb/(baudrate+1)
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u8 bits_mode: 4;
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u8 colection: 2;
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u8 th: 2; //timing_half:0-->timing_width不减少半个hsb系统时钟周期，1-->timing_width减少半个hsb系统时钟周期
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u8 ts;//timing_setup:ts个hsb系统时钟宽度
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u8 tw;//timing_width:tw个hsb系统时钟宽度
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u32 time_out;//emi发送超时时间，单位ms
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u32 data_bit_en;//32位(4字节)对应IO的输出使能(0禁止输出,1输出)
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};
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struct emi_device {
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char *name;
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struct device dev;
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void (*emi_isr_cb)(void *priv);
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OS_SEM send_sem;
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char use_send_sem;
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char non_block;
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volatile char wait_send_flg;
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u32 time_out;
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void *priv;
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};
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#define REGISTER_EMI_DEVICE(pdev) \
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static struct emi_device pdev = {\
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.name = "emi",\
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}
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extern const struct device_operations emi_dev_ops;
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#endif
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