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https://github.com/DragonOS-Community/DragonOS.git
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解决了一些小问题
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fslongjin
372
kernel/driver/keyboard/ps2_keyboard.c
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372
kernel/driver/keyboard/ps2_keyboard.c
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#include "ps2_keyboard.h"
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#include "../interrupt/apic/apic.h"
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#include "../../mm/mm.h"
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#include "../../mm/slab.h"
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#include "../../common/printk.h"
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static struct ps2_keyboard_input_buffer *kb_buf_ptr = NULL;
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// 功能键标志变量
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static bool shift_l, shift_r, ctrl_l, ctrl_r, alt_l, alt_r;
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static bool gui_l, gui_r, apps, insert, home, pgup, del, end, pgdn, arrow_u, arrow_l, arrow_d, arrow_r;
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static bool kp_forward_slash, kp_en;
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struct apic_IO_APIC_RTE_entry entry;
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hardware_intr_controller ps2_keyboard_intr_controller =
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{
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.enable = apic_ioapic_enable,
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.disable = apic_ioapic_disable,
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.install = apic_ioapic_install,
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.uninstall = apic_ioapic_uninstall,
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.ack = apic_ioapic_edge_ack,
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};
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/**
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* @brief 键盘中断处理函数（中断上半部）
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* 将数据存入缓冲区
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* @param irq_num 中断向量号
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* @param param 参数
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* @param regs 寄存器信息
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*/
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void ps2_keyboard_handler(ul irq_num, ul param, struct pt_regs *regs)
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{
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// 读取键盘输入的信息
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unsigned char x = io_in8(PORT_PS2_KEYBOARD_DATA);
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// printk_color(ORANGE, BLACK, "key_pressed:%02x\n", x);
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// 当头指针越过界时，恢复指向数组头部
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if (kb_buf_ptr->ptr_head == kb_buf_ptr->buffer + ps2_keyboard_buffer_size)
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kb_buf_ptr->ptr_head = kb_buf_ptr->buffer;
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if (kb_buf_ptr->count >= ps2_keyboard_buffer_size)
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{
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kwarn("ps2_keyboard input buffer is full.");
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return;
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}
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*kb_buf_ptr->ptr_head = x;
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++(kb_buf_ptr->count);
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++(kb_buf_ptr->ptr_head);
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}
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/**
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* @brief 初始化键盘驱动程序的函数
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*
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*/
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void ps2_keyboard_init()
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{
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// 开启键盘中断，中断向量号为0x21，物理模式，投递至BSP处理器
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apic_ioapic_write_rte(0x12, 0x21);
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// ======= 初始化键盘循环队列缓冲区 ===========
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// 申请键盘循环队列缓冲区的内存
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kb_buf_ptr = (struct ps2_keyboard_input_buffer *)kmalloc(sizeof(struct ps2_keyboard_input_buffer), 0);
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kb_buf_ptr->ptr_head = kb_buf_ptr->buffer;
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kb_buf_ptr->ptr_tail = kb_buf_ptr->buffer;
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kb_buf_ptr->count = 0;
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memset(kb_buf_ptr->buffer, 0, ps2_keyboard_buffer_size);
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// ======== 初始化中断RTE entry ==========
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entry.vector = PS2_KEYBOARD_INTR_VECTOR; // 设置中断向量号
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entry.deliver_mode = IO_APIC_FIXED; // 投递模式：混合
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entry.dest_mode = DEST_PHYSICAL; // 物理模式投递中断
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entry.deliver_status = IDLE;
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entry.trigger_mode = EDGE_TRIGGER; // 设置边沿触发
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entry.polarity = POLARITY_HIGH; // 高电平触发
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entry.remote_IRR = IRR_RESET;
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entry.mask = MASKED;
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entry.reserved = 0;
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entry.destination.physical.reserved1 = 0;
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entry.destination.physical.reserved2 = 0;
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entry.destination.physical.phy_dest = 0; // 设置投递到BSP处理器
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// ======== 初始化键盘控制器，写入配置值 =========
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wait_ps2_keyboard_write();
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io_out8(PORT_PS2_KEYBOARD_CONTROL, PS2_KEYBOARD_COMMAND_WRITE);
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wait_ps2_keyboard_write();
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io_out8(PORT_PS2_KEYBOARD_DATA, PS2_KEYBOARD_PARAM_INIT);
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wait_ps2_keyboard_write();
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// 执行一百万次nop，等待键盘控制器把命令执行完毕
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for (int i = 0; i < 1000; ++i)
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for (int j = 0; j < 1000; ++j)
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nop();
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shift_l = false;
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shift_r = false;
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ctrl_l = false;
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ctrl_r = false;
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alt_l = false;
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alt_r = false;
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// 注册中断处理程序
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irq_register(PS2_KEYBOARD_INTR_VECTOR, &entry, &ps2_keyboard_handler, (ul)kb_buf_ptr, &ps2_keyboard_intr_controller, "ps/2 keyboard");
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kdebug("kb registered.");
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}
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/**
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* @brief 键盘驱动卸载函数
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*
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*/
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void ps2_keyboard_exit()
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{
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irq_unregister(PS2_KEYBOARD_INTR_VECTOR);
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kfree((ul *)kb_buf_ptr);
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}
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/**
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* @brief 解析键盘扫描码
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*
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*/
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void ps2_keyboard_analyze_keycode()
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{
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bool flag_make = false;
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int c = ps2_keyboard_get_scancode();
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// 循环队列为空
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if (c == -1)
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return;
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unsigned char scancode = (unsigned char)c;
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int key = 0;
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if (scancode == 0xE1) // Pause Break
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{
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key = PAUSE_BREAK;
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// 清除缓冲区中剩下的扫描码
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for (int i = 1; i < 6; ++i)
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if (ps2_keyboard_get_scancode() != pause_break_scan_code[i])
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{
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key = 0;
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break;
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}
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}
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else if (scancode == 0xE0) // 功能键, 有多个扫描码
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{
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// 获取下一个扫描码
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scancode = ps2_keyboard_get_scancode();
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switch (scancode)
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{
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case 0x2a: // print screen 按键被按下
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if (ps2_keyboard_get_scancode() == 0xe0)
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if (ps2_keyboard_get_scancode() == 0x37)
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{
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key = PRINT_SCREEN;
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flag_make = true;
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}
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break;
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case 0xb7: // print screen 按键被松开
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if (ps2_keyboard_get_scancode() == 0xe0)
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if (ps2_keyboard_get_scancode() == 0xaa)
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{
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key = PRINT_SCREEN;
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flag_make = false;
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}
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break;
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case 0x1d: // 按下右边的ctrl
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ctrl_r = true;
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key = OTHER_KEY;
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break;
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case 0x9d: // 松开右边的ctrl
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ctrl_r = false;
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key = OTHER_KEY;
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break;
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case 0x38: // 按下右边的alt
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alt_r = true;
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key = OTHER_KEY;
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break;
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case 0xb8: // 松开右边的alt
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alt_r = false;
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key = OTHER_KEY;
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break;
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case 0x5b:
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gui_l = true;
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key = OTHER_KEY;
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break;
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case 0xdb:
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gui_l = false;
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key = OTHER_KEY;
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break;
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case 0x5c:
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gui_r = true;
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key = OTHER_KEY;
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break;
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case 0xdc:
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gui_r = false;
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key = OTHER_KEY;
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break;
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case 0x5d:
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apps = true;
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key = OTHER_KEY;
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break;
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case 0xdd:
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apps = false;
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key = OTHER_KEY;
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break;
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case 0x52:
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insert = true;
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key = OTHER_KEY;
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break;
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case 0xd2:
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insert = false;
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key = OTHER_KEY;
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break;
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case 0x47:
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home = true;
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key = OTHER_KEY;
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break;
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case 0xc7:
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home = false;
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key = OTHER_KEY;
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break;
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case 0x49:
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pgup = true;
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key = OTHER_KEY;
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break;
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case 0xc9:
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pgup = false;
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key = OTHER_KEY;
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break;
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case 0x53:
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del = true;
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key = OTHER_KEY;
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break;
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case 0xd3:
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del = false;
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key = OTHER_KEY;
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break;
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case 0x4f:
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end = true;
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key = OTHER_KEY;
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break;
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case 0xcf:
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end = false;
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key = OTHER_KEY;
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break;
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case 0x51:
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pgdn = true;
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key = OTHER_KEY;
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break;
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case 0xd1:
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pgdn = false;
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key = OTHER_KEY;
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break;
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case 0x48:
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arrow_u = true;
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key = OTHER_KEY;
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break;
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case 0xc8:
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arrow_u = false;
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key = OTHER_KEY;
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break;
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case 0x4b:
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arrow_l = true;
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key = OTHER_KEY;
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break;
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case 0xcb:
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arrow_l = false;
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key = OTHER_KEY;
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break;
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case 0x50:
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arrow_d = true;
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key = OTHER_KEY;
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break;
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case 0xd0:
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arrow_d = false;
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key = OTHER_KEY;
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break;
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case 0x4d:
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arrow_r = true;
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key = OTHER_KEY;
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break;
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case 0xcd:
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arrow_r = false;
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key = OTHER_KEY;
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break;
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case 0x35: // 数字小键盘的 / 符号
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kp_forward_slash = true;
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key = OTHER_KEY;
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break;
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case 0xb5:
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kp_forward_slash = false;
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key = OTHER_KEY;
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break;
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case 0x1c:
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kp_en = true;
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key = OTHER_KEY;
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break;
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case 0x9c:
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kp_en = false;
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key = OTHER_KEY;
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break;
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default:
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key = OTHER_KEY;
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break;
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}
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}
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if (key == 0) // 属于第三类扫描码
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{
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// 判断按键是被按下还是抬起
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flag_make = ((scancode & FLAG_BREAK) ? 0 : 1);
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// 计算扫描码位于码表的第几行
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uint *key_row = &keycode_map_normal[(scancode & 0x7f) * MAP_COLS];
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unsigned char col = 0;
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// shift被按下
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if (shift_l || shift_r)
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col = 1;
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key = key_row[col];
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switch (scancode & 0x7f)
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{
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case 0x2a:
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shift_l = flag_make;
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key = 0;
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break;
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case 0x36:
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shift_r = flag_make;
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key = 0;
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break;
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case 0x1d:
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ctrl_l = flag_make;
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key = 0;
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break;
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case 0x38:
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ctrl_r = flag_make;
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key = 0;
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break;
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default:
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if (!flag_make)
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key = 0;
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break;
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}
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if (key)
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printk_color(ORANGE, BLACK, "%c", key);
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}
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}
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/**
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* @brief 从缓冲队列中获取键盘扫描码
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*
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*/
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int ps2_keyboard_get_scancode()
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{
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// 缓冲队列为空
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if (kb_buf_ptr->count == 0)
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return -1;
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if (kb_buf_ptr->ptr_tail == kb_buf_ptr->buffer + ps2_keyboard_buffer_size)
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kb_buf_ptr->ptr_tail = kb_buf_ptr->buffer;
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int ret = (int)(*(kb_buf_ptr->ptr_tail));
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--(kb_buf_ptr->count);
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++(kb_buf_ptr->ptr_tail);
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return ret;
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}
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