116 lines
4.3 KiB
C
116 lines
4.3 KiB
C
/* deshab/input.h - PS/2 键盘与鼠标输入
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*
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* 整合 desktop_app.h 的 da_scan_to_ascii / da_mouse / da_mouse_init /
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* da_mouse_poll / da_ps2_drain，统一前缀为 dsb_。
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*
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* PS/2 鼠标初始化序列与 desktop/main.c:ps2_mouse_init 保持一致，
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* 必须先冲刷输出缓冲再发命令，避免残留字节污染配置字
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* （BUG-20260801-008）。
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*/
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#ifndef DESHAB_INPUT_H
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#define DESHAB_INPUT_H
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#include "types.h"
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#include "portio.h"
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#include "cursor.h"
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/* ---- 键盘 scan code set 1 -> ASCII ---- */
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static inline char dsb_scan_to_ascii(u8 sc, int shift) {
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static const char normal[58] = {
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0, 27, '1','2','3','4','5','6','7','8','9','0','-','=', 8, '\t',
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'q','w','e','r','t','y','u','i','o','p','[',']','\n',0,
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'a','s','d','f','g','h','j','k','l',';','\'', '`',0,'\\',
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'z','x','c','v','b','n','m',',','.','/',0,'*',0,' '
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};
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static const char shifted[58] = {
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0, 27, '!','@','#','$','%','^','&','*','(',')','_','+', 8, '\t',
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'Q','W','E','R','T','Y','U','I','O','P','{','}','\n',0,
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'A','S','D','F','G','H','J','K','L',':','"','~',0,'|',
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'Z','X','C','V','B','N','M','<','>','?',0,'*',0,' '
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};
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if (sc >= 58) return 0;
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return shift ? shifted[sc] : normal[sc];
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}
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/* ---- PS/2 鼠标 ---- */
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typedef struct dsb_mouse {
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u8 buf[3];
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int idx;
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int has_pkt;
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} dsb_mouse;
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/* 冲刷 PS/2 控制器输出缓冲（最多 16 字节）。 */
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static inline void dsb_ps2_drain(void) {
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for (int i = 0; i < 16; i++) {
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if (!(dsb_inb(0x64) & 1)) break;
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dsb_inb(0x60);
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}
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}
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/* 初始化 PS/2 鼠标：启用 AUX 端口 + 流模式 + 数据报告。
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* 序列与 desktop/main.c:ps2_mouse_init 一致。 */
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static inline void dsb_mouse_init(void) {
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dsb_ps2_drain();
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for (int t = 0; t < 100000; t++) { if (!(dsb_inb(0x64) & 2)) break; }
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dsb_outb(0x64, 0xA8);
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for (int t = 0; t < 100000; t++) { if (!(dsb_inb(0x64) & 2)) break; }
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dsb_outb(0x64, 0x20);
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for (int t = 0; t < 100000; t++) { if (dsb_inb(0x64) & 1) break; }
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u8 cfg = dsb_inb(0x60);
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cfg &= ~0x20; cfg |= 0x02; cfg |= 0x40; /* AUX 时钟启用 + AUX IRQ + 键盘翻译 */
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for (int t = 0; t < 100000; t++) { if (!(dsb_inb(0x64) & 2)) break; }
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dsb_outb(0x64, 0x60);
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for (int t = 0; t < 100000; t++) { if (!(dsb_inb(0x64) & 2)) break; }
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dsb_outb(0x60, cfg);
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for (int t = 0; t < 100000; t++) { if (!(dsb_inb(0x64) & 2)) break; }
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dsb_outb(0x64, 0xD4);
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for (int t = 0; t < 100000; t++) { if (!(dsb_inb(0x64) & 2)) break; }
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dsb_outb(0x60, 0xFF);
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for (int i = 0; i < 8; i++) { /* 读完复位全部响应(FA AA 00) */
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int got = 0;
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for (int t = 0; t < 100000; t++) { if (dsb_inb(0x64) & 1) { got = 1; break; } }
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if (!got) break;
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dsb_inb(0x60);
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}
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for (int t = 0; t < 100000; t++) { if (!(dsb_inb(0x64) & 2)) break; }
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dsb_outb(0x64, 0xD4);
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for (int t = 0; t < 100000; t++) { if (!(dsb_inb(0x64) & 2)) break; }
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dsb_outb(0x60, 0xF4);
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for (int i = 0; i < 4; i++) { /* 读完使能 ACK */
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int got = 0;
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for (int t = 0; t < 100000; t++) { if (dsb_inb(0x64) & 1) { got = 1; break; } }
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if (!got) break;
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dsb_inb(0x60);
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}
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dsb_ps2_drain();
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}
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/* 轮询鼠标：3 字节包解码，更新光标坐标与按键状态。
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* 返回 1=收到完整包，0=无数据/未完成。
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* 必须先查 AUX 位(bit5)再读数据端口，避免吞掉键盘扫描码
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* （BUG-20260801-003）。 */
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static inline int dsb_mouse_poll(dsb_mouse *m, dsb_cursor *c, i64 fb_w, i64 fb_h) {
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u8 st = dsb_inb(0x64);
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if (!(st & 1)) return 0;
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if (!(st & 0x20)) return 0; /* 非 AUX 数据，留给键盘路径 */
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u8 data = dsb_inb(0x60);
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m->buf[m->idx++] = data;
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if (m->idx < 3) return 0;
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m->idx = 0;
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if (!(m->buf[0] & 0x08)) return 0; /* 同步位验证 */
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int dx = (int)(signed char)m->buf[1];
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int dy = (int)(signed char)m->buf[2];
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dy = -dy; /* PS/2 Y 向上为正，屏幕 Y 向下为正 */
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c->mx += dx;
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c->my += dy;
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if (c->mx < 0) c->mx = 0;
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if (c->my < 0) c->my = 0;
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if (c->mx >= (int)fb_w - DSB_CURSOR_SIZE) c->mx = (int)fb_w - DSB_CURSOR_SIZE;
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if (c->my >= (int)fb_h - DSB_CURSOR_SIZE) c->my = (int)fb_h - DSB_CURSOR_SIZE;
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c->btn = (m->buf[0] & 0x01) ? 1 : 0;
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m->has_pkt = 1;
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return 1;
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}
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#endif /* DESHAB_INPUT_H */
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