// 16bit code to handle keyboard requests. // // Copyright (C) 2008 Kevin O'Connor // Copyright (C) 2002 MandrakeSoft S.A. // // This file may be distributed under the terms of the GNU GPLv3 license. #include "biosvar.h" // GET_BDA #include "util.h" // debug_enter #include "config.h" // CONFIG_* #include "pic.h" // eoi_pic1 #include "bregs.h" // struct bregs #include "ps2port.h" // i8042_flush static void keyboard_init() { if (CONFIG_COREBOOT) // Coreboot already does low-level keyboard init. goto end; /* flush incoming keys */ int ret = i8042_flush(); if (ret) return; // Controller self-test. u8 param[2]; ret = i8042_command(I8042_CMD_CTL_TEST, param); if (ret) return; if (param[0] != 0x55) { dprintf(1, "i8042 self test failed (got %x not 0x55)\n", param[0]); return; } // Controller keyboard test. ret = i8042_command(I8042_CMD_KBD_TEST, param); if (ret) return; if (param[0] != 0x00) { dprintf(1, "i8042 keyboard test failed (got %x not 0x00)\n", param[0]); return; } // Enable keyboard and mouse ports. ret = i8042_command(I8042_CMD_KBD_ENABLE, NULL); if (ret) return; ret = i8042_command(I8042_CMD_AUX_ENABLE, NULL); if (ret) return; /* ------------------- keyboard side ------------------------*/ /* reset keyboard and self test (keyboard side) */ ret = kbd_command(ATKBD_CMD_RESET_BAT, param); if (ret != 0 && ret != 2) return; if (param[0] != 0xaa) { dprintf(1, "keyboard self test failed (got %x not 0xaa)\n", param[0]); return; } /* Disable keyboard */ ret = kbd_command(ATKBD_CMD_RESET_DIS, NULL); if (ret) return; end: // Keyboard Mode: scan code convert, disable mouse, enable IRQ 1 SET_EBDA(ps2ctr, I8042_CTR_AUXDIS | I8042_CTR_XLATE | I8042_CTR_KBDINT); /* Enable keyboard */ ret = kbd_command(ATKBD_CMD_ENABLE, NULL); if (ret) return; dprintf(1, "keyboard initialized\n"); } void kbd_setup() { dprintf(3, "init keyboard\n"); u16 x = offsetof(struct bios_data_area_s, kbd_buf) - 0x400; SET_BDA(kbd_mode, 0x10); SET_BDA(kbd_buf_head, x); SET_BDA(kbd_buf_tail, x); SET_BDA(kbd_buf_start_offset, x); SET_BDA(kbd_buf_end_offset , x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf)); if (! CONFIG_KEYBOARD) return; keyboard_init(); enable_hwirq(1, entry_09); } static u8 enqueue_key(u8 scan_code, u8 ascii_code) { u16 buffer_start = GET_BDA(kbd_buf_start_offset); u16 buffer_end = GET_BDA(kbd_buf_end_offset); u16 buffer_head = GET_BDA(kbd_buf_head); u16 buffer_tail = GET_BDA(kbd_buf_tail); u16 temp_tail = buffer_tail; buffer_tail += 2; if (buffer_tail >= buffer_end) buffer_tail = buffer_start; if (buffer_tail == buffer_head) return 0; SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0x400+0), ascii_code); SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0x400+1), scan_code); SET_BDA(kbd_buf_tail, buffer_tail); return 1; } static u8 dequeue_key(u8 *scan_code, u8 *ascii_code, u8 incr) { u16 buffer_head; u16 buffer_tail; for (;;) { buffer_head = GET_BDA(kbd_buf_head); buffer_tail = GET_BDA(kbd_buf_tail); if (buffer_head != buffer_tail) break; if (!incr) return 0; cpu_relax(); } *ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0x400+0)); *scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0x400+1)); if (incr) { u16 buffer_start = GET_BDA(kbd_buf_start_offset); u16 buffer_end = GET_BDA(kbd_buf_end_offset); buffer_head += 2; if (buffer_head >= buffer_end) buffer_head = buffer_start; SET_BDA(kbd_buf_head, buffer_head); } return 1; } // read keyboard input static void handle_1600(struct bregs *regs) { u8 scan_code, ascii_code; dequeue_key(&scan_code, &ascii_code, 1); if (scan_code != 0 && ascii_code == 0xF0) ascii_code = 0; else if (ascii_code == 0xE0) ascii_code = 0; regs->ax = (scan_code << 8) | ascii_code; } // check keyboard status static void handle_1601(struct bregs *regs) { u8 scan_code, ascii_code; if (!dequeue_key(&scan_code, &ascii_code, 0)) { regs->flags |= F_ZF; return; } if (scan_code != 0 && ascii_code == 0xF0) ascii_code = 0; else if (ascii_code == 0xE0) ascii_code = 0; regs->ax = (scan_code << 8) | ascii_code; regs->flags &= ~F_ZF; } // get shift flag status static void handle_1602(struct bregs *regs) { regs->al = GET_BDA(kbd_flag0); } // store key-stroke into buffer static void handle_1605(struct bregs *regs) { regs->al = !enqueue_key(regs->ch, regs->cl); } // GET KEYBOARD FUNCTIONALITY static void handle_1609(struct bregs *regs) { // bit Bochs Description // 7 0 reserved // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support) // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support) // 4 1 INT 16/AH=0Ah supported // 3 0 INT 16/AX=0306h supported // 2 0 INT 16/AX=0305h supported // 1 0 INT 16/AX=0304h supported // 0 0 INT 16/AX=0300h supported // regs->al = 0x30; } // GET KEYBOARD ID static void handle_160a(struct bregs *regs) { u8 param[2]; int ret = kbd_command(ATKBD_CMD_GETID, param); if (ret) { regs->bx = 0; return; } regs->bx = (param[1] << 8) | param[0]; } // read MF-II keyboard input static void handle_1610(struct bregs *regs) { u8 scan_code, ascii_code; dequeue_key(&scan_code, &ascii_code, 1); if (scan_code != 0 && ascii_code == 0xF0) ascii_code = 0; regs->ax = (scan_code << 8) | ascii_code; } // check MF-II keyboard status static void handle_1611(struct bregs *regs) { u8 scan_code, ascii_code; if (!dequeue_key(&scan_code, &ascii_code, 0)) { regs->flags |= F_ZF; return; } if (scan_code != 0 && ascii_code == 0xF0) ascii_code = 0; regs->ax = (scan_code << 8) | ascii_code; regs->flags &= ~F_ZF; } // get extended keyboard status static void handle_1612(struct bregs *regs) { regs->al = GET_BDA(kbd_flag0); regs->ah = (GET_BDA(kbd_flag1) & 0x73) | (GET_BDA(kbd_mode) & 0x0c); //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX); } static void handle_166f(struct bregs *regs) { if (regs->al == 0x08) // unsupported, aka normal keyboard regs->ah = 2; } // keyboard capability check called by DOS 5.0+ keyb static void handle_1692(struct bregs *regs) { // function int16 ah=0x10-0x12 supported regs->ah = 0x80; } // 122 keys capability check called by DOS 5.0+ keyb static void handle_16a2(struct bregs *regs) { // don't change AH : function int16 ah=0x20-0x22 NOT supported } static void handle_16XX(struct bregs *regs) { debug_stub(regs); } static void set_leds() { u8 shift_flags = (GET_BDA(kbd_flag0) >> 4) & 0x07; u8 kbd_led = GET_BDA(kbd_led); u8 led_flags = kbd_led & 0x07; if (shift_flags == led_flags) return; int ret = kbd_command(ATKBD_CMD_SETLEDS, &shift_flags); if (ret) // Error return; kbd_led = (kbd_led & ~0x07) | shift_flags; SET_BDA(kbd_led, kbd_led); } // INT 16h Keyboard Service Entry Point void VISIBLE16 handle_16(struct bregs *regs) { debug_enter(regs, DEBUG_HDL_16); if (! CONFIG_KEYBOARD) return; irq_enable(); set_leds(); switch (regs->ah) { case 0x00: handle_1600(regs); break; case 0x01: handle_1601(regs); break; case 0x02: handle_1602(regs); break; case 0x05: handle_1605(regs); break; case 0x09: handle_1609(regs); break; case 0x0a: handle_160a(regs); break; case 0x10: handle_1610(regs); break; case 0x11: handle_1611(regs); break; case 0x12: handle_1612(regs); break; case 0x92: handle_1692(regs); break; case 0xa2: handle_16a2(regs); break; case 0x6f: handle_166f(regs); break; default: handle_16XX(regs); break; } } #define none 0 #define MAX_SCAN_CODE 0x58 static struct scaninfo { u16 normal; u16 shift; u16 control; u16 alt; u8 lock_flags; } scan_to_scanascii[MAX_SCAN_CODE + 1] = { { none, none, none, none, none }, { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */ { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */ { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */ { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */ { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */ { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */ { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */ { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */ { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */ { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */ { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */ { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */ { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */ { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */ { 0x0f09, 0x0f00, none, none, none }, /* tab */ { 0x1071, 0x1051, 0x1011, 0x1000, 0x40 }, /* Q */ { 0x1177, 0x1157, 0x1117, 0x1100, 0x40 }, /* W */ { 0x1265, 0x1245, 0x1205, 0x1200, 0x40 }, /* E */ { 0x1372, 0x1352, 0x1312, 0x1300, 0x40 }, /* R */ { 0x1474, 0x1454, 0x1414, 0x1400, 0x40 }, /* T */ { 0x1579, 0x1559, 0x1519, 0x1500, 0x40 }, /* Y */ { 0x1675, 0x1655, 0x1615, 0x1600, 0x40 }, /* U */ { 0x1769, 0x1749, 0x1709, 0x1700, 0x40 }, /* I */ { 0x186f, 0x184f, 0x180f, 0x1800, 0x40 }, /* O */ { 0x1970, 0x1950, 0x1910, 0x1900, 0x40 }, /* P */ { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */ { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */ { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */ { none, none, none, none, none }, /* L Ctrl */ { 0x1e61, 0x1e41, 0x1e01, 0x1e00, 0x40 }, /* A */ { 0x1f73, 0x1f53, 0x1f13, 0x1f00, 0x40 }, /* S */ { 0x2064, 0x2044, 0x2004, 0x2000, 0x40 }, /* D */ { 0x2166, 0x2146, 0x2106, 0x2100, 0x40 }, /* F */ { 0x2267, 0x2247, 0x2207, 0x2200, 0x40 }, /* G */ { 0x2368, 0x2348, 0x2308, 0x2300, 0x40 }, /* H */ { 0x246a, 0x244a, 0x240a, 0x2400, 0x40 }, /* J */ { 0x256b, 0x254b, 0x250b, 0x2500, 0x40 }, /* K */ { 0x266c, 0x264c, 0x260c, 0x2600, 0x40 }, /* L */ { 0x273b, 0x273a, none, none, none }, /* ;: */ { 0x2827, 0x2822, none, none, none }, /* '" */ { 0x2960, 0x297e, none, none, none }, /* `~ */ { none, none, none, none, none }, /* L shift */ { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */ { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, 0x40 }, /* Z */ { 0x2d78, 0x2d58, 0x2d18, 0x2d00, 0x40 }, /* X */ { 0x2e63, 0x2e43, 0x2e03, 0x2e00, 0x40 }, /* C */ { 0x2f76, 0x2f56, 0x2f16, 0x2f00, 0x40 }, /* V */ { 0x3062, 0x3042, 0x3002, 0x3000, 0x40 }, /* B */ { 0x316e, 0x314e, 0x310e, 0x3100, 0x40 }, /* N */ { 0x326d, 0x324d, 0x320d, 0x3200, 0x40 }, /* M */ { 0x332c, 0x333c, none, none, none }, /* ,< */ { 0x342e, 0x343e, none, none, none }, /* .> */ { 0x352f, 0x353f, none, none, none }, /* /? */ { none, none, none, none, none }, /* R Shift */ { 0x372a, 0x372a, none, none, none }, /* * */ { none, none, none, none, none }, /* L Alt */ { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */ { none, none, none, none, none }, /* caps lock */ { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */ { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */ { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */ { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */ { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */ { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */ { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */ { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */ { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */ { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */ { none, none, none, none, none }, /* Num Lock */ { none, none, none, none, none }, /* Scroll Lock */ { 0x4700, 0x4737, 0x7700, none, 0x20 }, /* 7 Home */ { 0x4800, 0x4838, none, none, 0x20 }, /* 8 UP */ { 0x4900, 0x4939, 0x8400, none, 0x20 }, /* 9 PgUp */ { 0x4a2d, 0x4a2d, none, none, none }, /* - */ { 0x4b00, 0x4b34, 0x7300, none, 0x20 }, /* 4 Left */ { 0x4c00, 0x4c35, none, none, 0x20 }, /* 5 */ { 0x4d00, 0x4d36, 0x7400, none, 0x20 }, /* 6 Right */ { 0x4e2b, 0x4e2b, none, none, none }, /* + */ { 0x4f00, 0x4f31, 0x7500, none, 0x20 }, /* 1 End */ { 0x5000, 0x5032, none, none, 0x20 }, /* 2 Down */ { 0x5100, 0x5133, 0x7600, none, 0x20 }, /* 3 PgDn */ { 0x5200, 0x5230, none, none, 0x20 }, /* 0 Ins */ { 0x5300, 0x532e, none, none, 0x20 }, /* Del */ { none, none, none, none, none }, { none, none, none, none, none }, { 0x565c, 0x567c, none, none, none }, /* \| */ { 0x8500, 0x8700, 0x8900, 0x8b00, none }, /* F11 */ { 0x8600, 0x8800, 0x8a00, 0x8c00, none }, /* F12 */ }; static void process_key(u8 scancode) { u8 shift_flags = GET_BDA(kbd_flag0); u8 mf2_flags = GET_BDA(kbd_flag1); u8 mf2_state = GET_BDA(kbd_mode); switch (scancode) { case 0x00: dprintf(1, "KBD: int09 handler: AL=0\n"); return; case 0x3a: /* Caps Lock press */ shift_flags ^= 0x40; SET_BDA(kbd_flag0, shift_flags); mf2_flags |= 0x40; SET_BDA(kbd_flag1, mf2_flags); break; case 0xba: /* Caps Lock release */ mf2_flags &= ~0x40; SET_BDA(kbd_flag1, mf2_flags); break; case 0x2a: /* L Shift press */ shift_flags |= 0x02; SET_BDA(kbd_flag0, shift_flags); break; case 0xaa: /* L Shift release */ shift_flags &= ~0x02; SET_BDA(kbd_flag0, shift_flags); break; case 0x36: /* R Shift press */ shift_flags |= 0x01; SET_BDA(kbd_flag0, shift_flags); break; case 0xb6: /* R Shift release */ shift_flags &= ~0x01; SET_BDA(kbd_flag0, shift_flags); break; case 0x1d: /* Ctrl press */ if ((mf2_state & 0x01) == 0) { shift_flags |= 0x04; SET_BDA(kbd_flag0, shift_flags); if (mf2_state & 0x02) { mf2_state |= 0x04; SET_BDA(kbd_mode, mf2_state); } else { mf2_flags |= 0x01; SET_BDA(kbd_flag1, mf2_flags); } } break; case 0x9d: /* Ctrl release */ if ((mf2_state & 0x01) == 0) { shift_flags &= ~0x04; SET_BDA(kbd_flag0, shift_flags); if (mf2_state & 0x02) { mf2_state &= ~0x04; SET_BDA(kbd_mode, mf2_state); } else { mf2_flags &= ~0x01; SET_BDA(kbd_flag1, mf2_flags); } } break; case 0x38: /* Alt press */ shift_flags |= 0x08; SET_BDA(kbd_flag0, shift_flags); if (mf2_state & 0x02) { mf2_state |= 0x08; SET_BDA(kbd_mode, mf2_state); } else { mf2_flags |= 0x02; SET_BDA(kbd_flag1, mf2_flags); } break; case 0xb8: /* Alt release */ shift_flags &= ~0x08; SET_BDA(kbd_flag0, shift_flags); if (mf2_state & 0x02) { mf2_state &= ~0x08; SET_BDA(kbd_mode, mf2_state); } else { mf2_flags &= ~0x02; SET_BDA(kbd_flag1, mf2_flags); } break; case 0x45: /* Num Lock press */ if ((mf2_state & 0x03) == 0) { mf2_flags |= 0x20; SET_BDA(kbd_flag1, mf2_flags); shift_flags ^= 0x20; SET_BDA(kbd_flag0, shift_flags); } break; case 0xc5: /* Num Lock release */ if ((mf2_state & 0x03) == 0) { mf2_flags &= ~0x20; SET_BDA(kbd_flag1, mf2_flags); } break; case 0x46: /* Scroll Lock press */ mf2_flags |= 0x10; SET_BDA(kbd_flag1, mf2_flags); shift_flags ^= 0x10; SET_BDA(kbd_flag0, shift_flags); break; case 0xc6: /* Scroll Lock release */ mf2_flags &= ~0x10; SET_BDA(kbd_flag1, mf2_flags); break; case 0xe0: // Extended key SETBITS_BDA(kbd_mode, 0x02); return; case 0xe1: // Pause key SETBITS_BDA(kbd_mode, 0x01); return; default: if (scancode & 0x80) { break; /* toss key releases ... */ } if (scancode > MAX_SCAN_CODE) { dprintf(1, "KBD: int09h_handler(): unknown scancode read: 0x%02x!\n" , scancode); return; } u8 asciicode; struct scaninfo *info = &scan_to_scanascii[scancode]; if (shift_flags & 0x08) { /* ALT */ asciicode = GET_VAR(CS, info->alt); scancode = GET_VAR(CS, info->alt) >> 8; } else if (shift_flags & 0x04) { /* CONTROL */ asciicode = GET_VAR(CS, info->control); scancode = GET_VAR(CS, info->control) >> 8; } else if ((mf2_state & 0x02) > 0 && scancode >= 0x47 && scancode <= 0x53) { /* extended keys handling */ asciicode = 0xe0; scancode = GET_VAR(CS, info->normal) >> 8; } else if (shift_flags & 0x03) { /* LSHIFT + RSHIFT */ /* check if lock state should be ignored * because a SHIFT key are pressed */ if (shift_flags & GET_VAR(CS, info->lock_flags)) { asciicode = GET_VAR(CS, info->normal); scancode = GET_VAR(CS, info->normal) >> 8; } else { asciicode = GET_VAR(CS, info->shift); scancode = GET_VAR(CS, info->shift) >> 8; } } else { /* check if lock is on */ if (shift_flags & GET_VAR(CS, info->lock_flags)) { asciicode = GET_VAR(CS, info->shift); scancode = GET_VAR(CS, info->shift) >> 8; } else { asciicode = GET_VAR(CS, info->normal); scancode = GET_VAR(CS, info->normal) >> 8; } } if (scancode==0 && asciicode==0) { dprintf(1, "KBD: int09h_handler():" " scancode & asciicode are zero?\n"); } enqueue_key(scancode, asciicode); break; } if ((scancode & 0x7f) != 0x1d) { mf2_state &= ~0x01; } mf2_state &= ~0x02; SET_BDA(kbd_mode, mf2_state); } // INT09h : Keyboard Hardware Service Entry Point void VISIBLE16 handle_09() { debug_isr(DEBUG_ISR_09); if (! CONFIG_KEYBOARD) goto done; // read key from keyboard controller u8 v = inb(PORT_PS2_STATUS); if ((v & 0x21) != 0x01) { dprintf(1, "int09 but no keyboard data.\n"); goto done; } u8 key = inb(PORT_PS2_DATA); irq_enable(); if (CONFIG_KBD_CALL_INT15_4F) { // allow for keyboard intercept struct bregs tr; memset(&tr, 0, sizeof(tr)); tr.al = key; tr.ah = 0x4f; tr.flags = F_CF; call16_int(0x15, &tr); if (!(tr.flags & F_CF)) goto done; key = tr.al; } process_key(key); irq_disable(); done: eoi_pic1(); }