#include "keyboard.h" #include "../interrupt/apic/apic.h" #include "../../mm/mm.h" #include "../../mm/slab.h" #include "../../common/printk.h" static struct keyboard_input_buffer *kb_buf_ptr = NULL; // 功能键标志变量 static bool shift_l, shift_r, ctrl_l, ctrl_r, alt_l, alt_r; static bool gui_l, gui_r, apps, insert, home, pgup, del, end, pgdn, arrow_u, arrow_l, arrow_d, arrow_r; static bool kp_forward_slash, kp_en; struct apic_IO_APIC_RTE_entry entry; hardware_intr_controller keyboard_intr_controller = { .enable = apic_ioapic_enable, .disable = apic_ioapic_disable, .install = apic_ioapic_install, .uninstall = apic_ioapic_uninstall, .ack = apic_ioapic_edge_ack, }; /** * @brief 键盘中断处理函数（中断上半部） * 将数据存入缓冲区 * @param irq_num 中断向量号 * @param param 参数 * @param regs 寄存器信息 */ void keyboard_handler(ul irq_num, ul param, struct pt_regs *regs) { // 读取键盘输入的信息 unsigned x = io_in8(0x60); // printk_color(ORANGE, BLACK, "key_pressed:%02x\n", x); // 当头指针越过界时，恢复指向数组头部 if (kb_buf_ptr->ptr_head == kb_buf_ptr->buffer + keyboard_buffer_size) kb_buf_ptr->ptr_head = kb_buf_ptr->buffer; if (kb_buf_ptr->count >= keyboard_buffer_size) { kwarn("Keyboard input buffer is full."); return; } *kb_buf_ptr->ptr_head = x; ++(kb_buf_ptr->count); ++(kb_buf_ptr->ptr_head); } /** * @brief 初始化键盘驱动程序的函数 * */ void keyboard_init() { // ======= 初始化键盘循环队列缓冲区 =========== // 申请键盘循环队列缓冲区的内存 kb_buf_ptr = (struct keyboard_input_buffer *)kmalloc(sizeof(struct keyboard_input_buffer), 0); kb_buf_ptr->ptr_head = kb_buf_ptr->buffer; kb_buf_ptr->ptr_tail = kb_buf_ptr->buffer; kb_buf_ptr->count = 0; memset(kb_buf_ptr->buffer, 0, keyboard_buffer_size); // ======== 初始化中断RTE entry ========== entry.vector = 0x21; // 设置中断向量号 entry.deliver_mode = IO_APIC_FIXED; // 投递模式：混合 entry.dest_mode = DEST_PHYSICAL; // 物理模式投递中断 entry.deliver_status = IDLE; entry.trigger_mode = EDGE_TRIGGER; // 设置边沿触发 entry.polarity = POLARITY_HIGH; // 高电平触发 entry.remote_IRR = IRR_RESET; entry.mask = MASKED; entry.reserved = 0; entry.destination.physical.reserved1 = 0; entry.destination.physical.reserved2 = 0; entry.destination.physical.phy_dest = 0; // 设置投递到BSP处理器 // ======== 初始化键盘控制器，写入配置值 ========= wait_keyboard_write(); io_out8(PORT_KEYBOARD_CONTROL, KEYBOARD_COMMAND_WRITE); wait_keyboard_write(); io_out8(PORT_KEYBOARD_DATA, KEYBOARD_PARAM_INIT); wait_keyboard_write(); // 执行一百万次nop，等待键盘控制器把命令执行完毕 for (int i = 0; i < 1000; ++i) for (int j = 0; j < 1000; ++j) nop(); shift_l = false; shift_r = false; ctrl_l = false; ctrl_r = false; alt_l = false; alt_r = false; // 注册中断处理程序 irq_register(0x21, &entry, &keyboard_handler, (ul)kb_buf_ptr, &keyboard_intr_controller, "ps/2 keyboard"); } /** * @brief 键盘驱动卸载函数 * */ void keyboard_exit() { irq_unregister(0x21); kfree((ul *)kb_buf_ptr); } /** * @brief 解析键盘扫描码 * */ void keyboard_analyze_keycode() { bool flag_make = false; int c = keyboard_get_scancode(); // 循环队列为空 if (c == -1) return; unsigned char scancode = (unsigned char)c; int key = 0; if (scancode == 0xE1) // Pause Break { key = PAUSE_BREAK; // 清除缓冲区中剩下的扫描码 for (int i = 1; i < 6; ++i) if (keyboard_get_scancode() != pause_break_scan_code[i]) { key = 0; break; } } else if (scancode == 0xE0) // 功能键, 有多个扫描码 { // 获取下一个扫描码 scancode = keyboard_get_scancode(); switch (scancode) { case 0x2a: // print screen 按键被按下 if (keyboard_get_scancode() == 0xe0) if (keyboard_get_scancode() == 0x37) { key = PRINT_SCREEN; flag_make = true; } break; case 0xb7: // print screen 按键被松开 if (keyboard_get_scancode() == 0xe0) if (keyboard_get_scancode() == 0xaa) { key = PRINT_SCREEN; flag_make = false; } break; case 0x1d: // 按下右边的ctrl ctrl_r = true; key = OTHER_KEY; break; case 0x9d: // 松开右边的ctrl ctrl_r = false; key = OTHER_KEY; break; case 0x38: // 按下右边的alt alt_r = true; key = OTHER_KEY; break; case 0xb8: // 松开右边的alt alt_r = false; key = OTHER_KEY; break; case 0x5b: gui_l = true; key = OTHER_KEY; break; case 0xdb: gui_l = false; key = OTHER_KEY; break; case 0x5c: gui_r = true; key = OTHER_KEY; break; case 0xdc: gui_r = false; key = OTHER_KEY; break; case 0x5d: apps = true; key = OTHER_KEY; break; case 0xdd: apps = false; key = OTHER_KEY; break; case 0x52: insert = true; key = OTHER_KEY; break; case 0xd2: insert = false; key = OTHER_KEY; break; case 0x47: home = true; key = OTHER_KEY; break; case 0xc7: home = false; key = OTHER_KEY; break; case 0x49: pgup = true; key = OTHER_KEY; break; case 0xc9: pgup = false; key = OTHER_KEY; break; case 0x53: del = true; key = OTHER_KEY; break; case 0xd3: del = false; key = OTHER_KEY; break; case 0x4f: end = true; key = OTHER_KEY; break; case 0xcf: end = false; key = OTHER_KEY; break; case 0x51: pgdn = true; key = OTHER_KEY; break; case 0xd1: pgdn = false; key = OTHER_KEY; break; case 0x48: arrow_u = true; key = OTHER_KEY; break; case 0xc8: arrow_u = false; key = OTHER_KEY; break; case 0x4b: arrow_l = true; key = OTHER_KEY; break; case 0xcb: arrow_l = false; key = OTHER_KEY; break; case 0x50: arrow_d = true; key = OTHER_KEY; break; case 0xd0: arrow_d = false; key = OTHER_KEY; break; case 0x4d: arrow_r = true; key = OTHER_KEY; break; case 0xcd: arrow_r = false; key = OTHER_KEY; break; case 0x35: // 数字小键盘的 / 符号 kp_forward_slash = true; key = OTHER_KEY; break; case 0xb5: kp_forward_slash = false; key = OTHER_KEY; break; case 0x1c: kp_en = true; key = OTHER_KEY; break; case 0x9c: kp_en = false; key = OTHER_KEY; break; default: key = OTHER_KEY; break; } } if (key == 0) // 属于第三类扫描码 { // 判断按键是被按下还是抬起 flag_make = ((scancode & FLAG_BREAK) ? 0 : 1); // 计算扫描码位于码表的第几行 uint *key_row = &keycode_map_normal[(scancode & 0x7f) * MAP_COLS]; unsigned char col = 0; // shift被按下 if (shift_l || shift_r) col = 1; key = key_row[col]; switch (scancode & 0x7f) { case 0x2a: shift_l = flag_make; key = 0; break; case 0x36: shift_r = flag_make; key = 0; break; case 0x1d: ctrl_l = flag_make; key = 0; break; case 0x38: ctrl_r = flag_make; key = 0; break; default: if (!flag_make) key = 0; break; } if (key) printk_color(ORANGE, WHITE, "(key:%c)\t", key); } } /** * @brief 从缓冲队列中获取键盘扫描码 * */ int keyboard_get_scancode() { // 缓冲队列为空 if (kb_buf_ptr->count == 0) return -1; if (kb_buf_ptr->ptr_tail == kb_buf_ptr->buffer + keyboard_buffer_size) kb_buf_ptr->ptr_tail = kb_buf_ptr->buffer; int ret = (int)(*(kb_buf_ptr->ptr_tail)); --(kb_buf_ptr->count); ++(kb_buf_ptr->ptr_tail); return ret; }