IIC驱动,增加初始化

src/core/main.c

@@ -27,6 +27,7 @@
 #include "hda.h"
 #include "vsound.h"
 #include "shell.h"
+#include "iic_core.h"
 
 extern void* program_break_end;
 
@@ -92,6 +93,7 @@ _Noreturn void kernel_main(multiboot_t *multiboot, uint32_t kernel_stack) {
     ahci_init();
     hda_init();
     hda_regist();
+    iic_init();
 
     devfs_regist();
 

src/driver/iic_core.c

@@ -0,0 +1,52 @@
+#pragma once
+
+#include "iic_core.h"
+
+void iic_init(void) {
+    pci_device_t *IIC_Master_Controller = pci_find_class(0x0C800000);
+    if (IIC_Master_Controller == NULL) {
+        klogf(false, "Cannot find IIC Master Controller.\n");
+        return;
+    } else {
+        klogf(true, "Find IIC Master Controller.\n");
+    }
+}
+
+bool crc_check(IIC_Data *frame) {
+
+    uint32_t *data = frame->data;
+    uint8_t crc = crc8(data, frame->data_len);
+    if (crc != frame->crc) {
+        printk("CRC error!\n");
+        return false;
+    }else{
+        return true;
+    }
+}
+
+uint32_t iic_data_transfer(IIC_Data *frame) {
+
+    if (crc_check(frame)) {
+        // 将原始数据转换为32位值
+        uint32_t original_data = 0;
+        for (uint8_t i = 0; i < frame->data_len; i++) {
+            original_data |= (uint32_t)
+            data[i] << (8 * i);
+        }
+        return original_data;
+    }
+}
+void iic_start(pci_device_t *IIC_Device) {
+    // IIC主机控制器基地址发送起始信号
+    base_address_register iic_bar = find_bar(IIC_Device, 0);
+    uint32_t base_address = (uint32_t)(iic_bar.address);
+    io_out8(base_address + 0x10, 0x01);
+}
+void iic_stop(pci_device_t *IIC_Device) {
+    // IIC主机控制器基地址发送停止信号
+    base_address_register iic_bar = find_bar(IIC_Device, 0);
+    uint32_t base_address = (uint32_t)(iic_bar.address);
+    io_out8(base_address + 0x14, 0x00);
+}
+
+

src/include/crc.h

@@ -1,8 +1,6 @@
-#ifndef COOLPOTOS_CRC_H
-#define COOLPOTOS_CRC_H
+#pragma once
 
 #include "ctypes.h"
 
 uint8_t crc8(uint32_t *data, uint8_t len);
 
-#endif //COOLPOTOS_CRC_H

src/include/iic.h → src/include/iic_core.h

@@ -1,16 +1,21 @@
-#ifndef COOLPOTOS_IIC_H
-#define COOLPOTOS_IIC_H
+#pragma once
 
 #include "ctypes.h"
+
 #include "list.h"
 #include "io.h"
 #include "crc.h"
+#include "klog.h"
+#include "pci.h"
 
 typedef struct {
     uint32_t address;          // 地址
     uint8_t reg_address;       // 寄存器首地址
     uint32_t freq;             // 频率
-    void (*init)(void);        // 设备初始化函数
+    uint8_t flag;             // 状态
+    void (*init)(void);        // 设备初始化
+    void (*probe)(void);       // 挂载设备
+    void (*remove)(void);     // 卸载设备
 } IIC_Device;
 typedef struct {
     uint8_t rw_flag;           // 读写标志（0x00：写，0x01：读）
@@ -23,6 +28,8 @@ typedef struct {
     uint8_t stop;              // 数据段末标（0x01）
 } IIC_Data;
 
-int crc_check(IIC_Data *frame);
-
-#endif //COOLPOTOS_IIC_H
+void iic_init(void);
+bool crc_check(IIC_Data *frame);
+uint32_t iic_data_transfer(IIC_Data *frame);
+void iic_start(pci_device_t *IIC_Device);
+void iic_stop(pci_device_t *IIC_Device);