| // 16bit code to handle keyboard requests. |
| // |
| // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> |
| // Copyright (C) 2002 MandrakeSoft S.A. |
| // |
| // This file may be distributed under the terms of the GNU GPLv3 license. |
| |
| #include "biosvar.h" // struct bregs |
| #include "util.h" // debug_enter |
| #include "config.h" // CONFIG_* |
| |
| //-------------------------------------------------------------------------- |
| // keyboard_panic |
| //-------------------------------------------------------------------------- |
| static void |
| keyboard_panic(u16 status) |
| { |
| // If you're getting a 993 keyboard panic here, |
| // please see the comment in keyboard_init |
| |
| BX_PANIC("Keyboard error:%u\n",status); |
| } |
| |
| static void |
| kbd_flush(u8 code) |
| { |
| u16 max = 0xffff; |
| while ((inb(PORT_PS2_STATUS) & 0x02) && (--max > 0)) |
| outb(code, PORT_DIAG); |
| if (!max && code != 0xff) |
| keyboard_panic(code); |
| } |
| |
| static void |
| kbd_waitdata(u8 code) |
| { |
| u16 max = 0xffff; |
| while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) ) |
| outb(code, PORT_DIAG); |
| if (!max) |
| keyboard_panic(code); |
| } |
| |
| //-------------------------------------------------------------------------- |
| // keyboard_init |
| //-------------------------------------------------------------------------- |
| // this file is based on LinuxBIOS implementation of keyboard.c |
| static void |
| keyboard_init() |
| { |
| if (CONFIG_COREBOOT) |
| // Coreboot already does low-level keyboard init. |
| return; |
| |
| /* ------------------- Flush buffers ------------------------*/ |
| /* Wait until buffer is empty */ |
| kbd_flush(0xff); |
| |
| /* flush incoming keys */ |
| u16 max=0x2000; |
| while (--max > 0) { |
| outb(0x00, PORT_DIAG); |
| if (inb(PORT_PS2_STATUS) & 0x01) { |
| inb(PORT_PS2_DATA); |
| max = 0x2000; |
| } |
| } |
| |
| // Due to timer issues, and if the IPS setting is > 15000000, |
| // the incoming keys might not be flushed here. That will |
| // cause a panic a few lines below. See sourceforge bug report : |
| // [ 642031 ] FATAL: Keyboard RESET error:993 |
| |
| /* ------------------- controller side ----------------------*/ |
| /* send cmd = 0xAA, self test 8042 */ |
| outb(0xaa, PORT_PS2_STATUS); |
| |
| kbd_flush(0x00); |
| kbd_waitdata(0x01); |
| |
| /* read self-test result, 0x55 should be returned from 0x60 */ |
| if (inb(PORT_PS2_DATA) != 0x55) |
| keyboard_panic(991); |
| |
| /* send cmd = 0xAB, keyboard interface test */ |
| outb(0xab, PORT_PS2_STATUS); |
| |
| kbd_flush(0x10); |
| kbd_waitdata(0x11); |
| |
| /* read keyboard interface test result, */ |
| /* 0x00 should be returned form 0x60 */ |
| if (inb(PORT_PS2_DATA) != 0x00) |
| keyboard_panic(992); |
| |
| /* Enable Keyboard clock */ |
| outb(0xae, PORT_PS2_STATUS); |
| outb(0xa8, PORT_PS2_STATUS); |
| |
| /* ------------------- keyboard side ------------------------*/ |
| /* reset kerboard and self test (keyboard side) */ |
| outb(0xff, PORT_PS2_DATA); |
| |
| kbd_flush(0x20); |
| kbd_waitdata(0x21); |
| |
| /* keyboard should return ACK */ |
| if (inb(PORT_PS2_DATA) != 0xfa) |
| keyboard_panic(993); |
| |
| kbd_waitdata(0x31); |
| |
| if (inb(PORT_PS2_DATA) != 0xaa) |
| keyboard_panic(994); |
| |
| /* Disable keyboard */ |
| outb(0xf5, PORT_PS2_DATA); |
| |
| kbd_flush(0x40); |
| kbd_waitdata(0x41); |
| |
| /* keyboard should return ACK */ |
| if (inb(PORT_PS2_DATA) != 0xfa) |
| keyboard_panic(995); |
| |
| /* Write Keyboard Mode */ |
| outb(0x60, PORT_PS2_STATUS); |
| |
| kbd_flush(0x50); |
| |
| /* send cmd: scan code convert, disable mouse, enable IRQ 1 */ |
| outb(0x61, PORT_PS2_DATA); |
| |
| kbd_flush(0x60); |
| |
| /* Enable keyboard */ |
| outb(0xf4, PORT_PS2_DATA); |
| |
| kbd_flush(0x70); |
| kbd_waitdata(0x71); |
| |
| /* keyboard should return ACK */ |
| if (inb(PORT_PS2_DATA) != 0xfa) |
| keyboard_panic(996); |
| |
| outb(0x77, PORT_DIAG); |
| } |
| |
| 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)); |
| |
| keyboard_init(); |
| } |
| |
| 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) |
| { |
| outb(0xf2, PORT_PS2_DATA); |
| /* Wait for data */ |
| u16 max=0xffff; |
| while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) ) |
| outb(0x00, PORT_DIAG); |
| if (!max) |
| return; |
| if (inb(PORT_PS2_DATA) != 0xfa) { |
| regs->bx = 0; |
| return; |
| } |
| u16 kbd_code = 0; |
| u8 count = 2; |
| do { |
| max=0xffff; |
| while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) ) |
| outb(0x00, PORT_DIAG); |
| if (max>0x0) { |
| kbd_code >>= 8; |
| kbd_code |= (inb(PORT_PS2_DATA) << 8); |
| } |
| } while (--count>0); |
| regs->bx = kbd_code; |
| } |
| |
| // 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 |
| set_leds() |
| { |
| u8 shift_flags = GET_BDA(kbd_flag0); |
| u8 led_flags = GET_BDA(kbd_led); |
| if (((shift_flags >> 4) & 0x07) ^ ((led_flags & 0x07) == 0)) |
| return; |
| |
| outb(0xed, PORT_PS2_DATA); |
| while ((inb(PORT_PS2_STATUS) & 0x01) == 0) |
| outb(0x21, PORT_DIAG); |
| if (inb(PORT_PS2_DATA) == 0xfa) { |
| led_flags &= 0xf8; |
| led_flags |= (shift_flags >> 4) & 0x07; |
| outb(led_flags & 0x07, PORT_PS2_DATA); |
| while ((inb(PORT_PS2_STATUS) & 0x01) == 0) |
| outb(0x21, PORT_DIAG); |
| inb(PORT_PS2_DATA); |
| SET_BDA(kbd_led, led_flags); |
| } |
| } |
| |
| // INT 16h Keyboard Service Entry Point |
| void VISIBLE16 |
| handle_16(struct bregs *regs) |
| { |
| //debug_enter(regs); |
| |
| set_leds(); |
| |
| irq_enable(); |
| |
| 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; |
| } |
| } |
| |
| #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 }, /* \| */ |
| { 0x5700, 0x5700, none, none, none }, /* F11 */ |
| { 0x5800, 0x5800, none, none, 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(); |
| |
| // disable keyboard |
| outb(0xad, PORT_PS2_STATUS); |
| |
| outb(0x0b, PORT_PIC1); |
| if ((inb(PORT_PIC1) & 0x02) == 0) |
| goto done; |
| |
| // read key from keyboard controller |
| 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(); |
| eoi_master_pic(); |
| |
| done: |
| // enable keyboard |
| outb(0xae, PORT_PS2_STATUS); |
| } |