| // 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 LGPLv3 license. |
| |
| #include "biosvar.h" // GET_BDA |
| #include "util.h" // debug_enter |
| #include "config.h" // CONFIG_* |
| #include "bregs.h" // struct bregs |
| #include "ps2port.h" // kbd_command |
| |
| // Bit definitions for BDA kbd_flag[012] |
| #define KF0_RSHIFT (1<<0) |
| #define KF0_LSHIFT (1<<1) |
| #define KF0_CTRLACTIVE (1<<2) |
| #define KF0_ALTACTIVE (1<<3) |
| #define KF0_SCROLLACTIVE (1<<4) |
| #define KF0_NUMACTIVE (1<<5) |
| #define KF0_CAPSACTIVE (1<<6) |
| |
| #define KF1_LCTRL (1<<0) |
| #define KF1_LALT (1<<1) |
| #define KF1_PAUSEACTIVE (1<<3) |
| #define KF1_SCROLL (1<<4) |
| #define KF1_NUM (1<<5) |
| #define KF1_CAPS (1<<6) |
| |
| #define KF2_LAST_E1 (1<<0) |
| #define KF2_LAST_E0 (1<<1) |
| #define KF2_RCTRL (1<<2) |
| #define KF2_RALT (1<<3) |
| #define KF2_101KBD (1<<4) |
| |
| void |
| kbd_setup() |
| { |
| dprintf(3, "init keyboard\n"); |
| u16 x = offsetof(struct bios_data_area_s, kbd_buf); |
| SET_BDA(kbd_flag2, KF2_101KBD); |
| 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)); |
| } |
| |
| 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+0), ascii_code); |
| SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+1), scan_code); |
| SET_BDA(kbd_buf_tail, buffer_tail); |
| return 1; |
| } |
| |
| static void |
| dequeue_key(struct bregs *regs, int incr, int extended) |
| { |
| 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) { |
| regs->flags |= F_ZF; |
| return; |
| } |
| wait_irq(); |
| } |
| |
| u8 ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0)); |
| u8 scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+1)); |
| if ((ascii_code == 0xF0 && scan_code != 0) |
| || (ascii_code == 0xE0 && !extended)) |
| ascii_code = 0; |
| regs->ax = (scan_code << 8) | ascii_code; |
| |
| if (!incr) { |
| regs->flags &= ~F_ZF; |
| return; |
| } |
| 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); |
| } |
| |
| // read keyboard input |
| static void |
| handle_1600(struct bregs *regs) |
| { |
| dequeue_key(regs, 1, 0); |
| } |
| |
| // check keyboard status |
| static void |
| handle_1601(struct bregs *regs) |
| { |
| dequeue_key(regs, 0, 0); |
| } |
| |
| // 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) |
| { |
| dequeue_key(regs, 1, 1); |
| } |
| |
| // check MF-II keyboard status |
| static void |
| handle_1611(struct bregs *regs) |
| { |
| dequeue_key(regs, 0, 1); |
| } |
| |
| // get extended keyboard status |
| static void |
| handle_1612(struct bregs *regs) |
| { |
| regs->al = GET_BDA(kbd_flag0); |
| regs->ah = ((GET_BDA(kbd_flag1) & ~(KF2_RCTRL|KF2_RALT)) |
| | (GET_BDA(kbd_flag2) & (KF2_RCTRL|KF2_RALT))); |
| //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) |
| { |
| warn_unimplemented(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; |
| |
| // XXX - set_leds should be called from irq handler |
| 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 MNUM KF0_NUMACTIVE |
| #define MCAP KF0_CAPSACTIVE |
| |
| static struct scaninfo { |
| u16 normal; |
| u16 shift; |
| u16 control; |
| u16 alt; |
| u8 lock_flags; |
| } scan_to_scanascii[] VAR16 = { |
| { 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, MCAP }, /* Q */ |
| { 0x1177, 0x1157, 0x1117, 0x1100, MCAP }, /* W */ |
| { 0x1265, 0x1245, 0x1205, 0x1200, MCAP }, /* E */ |
| { 0x1372, 0x1352, 0x1312, 0x1300, MCAP }, /* R */ |
| { 0x1474, 0x1454, 0x1414, 0x1400, MCAP }, /* T */ |
| { 0x1579, 0x1559, 0x1519, 0x1500, MCAP }, /* Y */ |
| { 0x1675, 0x1655, 0x1615, 0x1600, MCAP }, /* U */ |
| { 0x1769, 0x1749, 0x1709, 0x1700, MCAP }, /* I */ |
| { 0x186f, 0x184f, 0x180f, 0x1800, MCAP }, /* O */ |
| { 0x1970, 0x1950, 0x1910, 0x1900, MCAP }, /* 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, MCAP }, /* A */ |
| { 0x1f73, 0x1f53, 0x1f13, 0x1f00, MCAP }, /* S */ |
| { 0x2064, 0x2044, 0x2004, 0x2000, MCAP }, /* D */ |
| { 0x2166, 0x2146, 0x2106, 0x2100, MCAP }, /* F */ |
| { 0x2267, 0x2247, 0x2207, 0x2200, MCAP }, /* G */ |
| { 0x2368, 0x2348, 0x2308, 0x2300, MCAP }, /* H */ |
| { 0x246a, 0x244a, 0x240a, 0x2400, MCAP }, /* J */ |
| { 0x256b, 0x254b, 0x250b, 0x2500, MCAP }, /* K */ |
| { 0x266c, 0x264c, 0x260c, 0x2600, MCAP }, /* 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, MCAP }, /* Z */ |
| { 0x2d78, 0x2d58, 0x2d18, 0x2d00, MCAP }, /* X */ |
| { 0x2e63, 0x2e43, 0x2e03, 0x2e00, MCAP }, /* C */ |
| { 0x2f76, 0x2f56, 0x2f16, 0x2f00, MCAP }, /* V */ |
| { 0x3062, 0x3042, 0x3002, 0x3000, MCAP }, /* B */ |
| { 0x316e, 0x314e, 0x310e, 0x3100, MCAP }, /* N */ |
| { 0x326d, 0x324d, 0x320d, 0x3200, MCAP }, /* 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, MNUM }, /* 7 Home */ |
| { 0x4800, 0x4838, none, none, MNUM }, /* 8 UP */ |
| { 0x4900, 0x4939, 0x8400, none, MNUM }, /* 9 PgUp */ |
| { 0x4a2d, 0x4a2d, none, none, none }, /* - */ |
| { 0x4b00, 0x4b34, 0x7300, none, MNUM }, /* 4 Left */ |
| { 0x4c00, 0x4c35, none, none, MNUM }, /* 5 */ |
| { 0x4d00, 0x4d36, 0x7400, none, MNUM }, /* 6 Right */ |
| { 0x4e2b, 0x4e2b, none, none, none }, /* + */ |
| { 0x4f00, 0x4f31, 0x7500, none, MNUM }, /* 1 End */ |
| { 0x5000, 0x5032, none, none, MNUM }, /* 2 Down */ |
| { 0x5100, 0x5133, 0x7600, none, MNUM }, /* 3 PgDn */ |
| { 0x5200, 0x5230, none, none, MNUM }, /* 0 Ins */ |
| { 0x5300, 0x532e, none, none, MNUM }, /* 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 */ |
| }; |
| |
| // Handle a scancode read from the ps2 port. Note that "noinline" is |
| // used to make sure the call to call16_simpint in process_key doesn't |
| // have the overhead of this function's stack. |
| static void noinline |
| __process_key(u8 scancode) |
| { |
| u8 flags0 = GET_BDA(kbd_flag0); |
| u8 flags1 = GET_BDA(kbd_flag1); |
| u8 flags2 = GET_BDA(kbd_flag2); |
| |
| if (flags2 & KF2_LAST_E1) { |
| // Part of "pause" key (sequence is e1 1d 45 e1 9d c5) |
| if ((scancode & ~0x80) == 0x1d) |
| // Second key of sequence |
| return; |
| // Third key of sequence - clear flag. |
| flags2 &= ~KF2_LAST_E1; |
| SET_BDA(kbd_flag2, flags2); |
| |
| if (scancode == 0xc5) { |
| // Final key in sequence. |
| |
| // XXX - do actual pause. |
| } |
| return; |
| } |
| |
| // XXX - PrtScr should cause int 0x05 |
| // XXX - Ctrl+Break should cause int 0x1B |
| // XXX - SysReq should cause int 0x15/0x85 |
| |
| switch (scancode) { |
| case 0x00: |
| dprintf(1, "KBD: int09 handler: AL=0\n"); |
| return; |
| |
| case 0x3a: /* Caps Lock press */ |
| flags0 ^= KF0_CAPSACTIVE; |
| flags1 |= KF1_CAPS; |
| break; |
| case 0xba: /* Caps Lock release */ |
| flags1 &= ~KF1_CAPS; |
| break; |
| |
| case 0x2a: /* L Shift press */ |
| flags0 |= KF0_LSHIFT; |
| break; |
| case 0xaa: /* L Shift release */ |
| flags0 &= ~KF0_LSHIFT; |
| break; |
| |
| case 0x36: /* R Shift press */ |
| flags0 |= KF0_RSHIFT; |
| break; |
| case 0xb6: /* R Shift release */ |
| flags0 &= ~KF0_RSHIFT; |
| break; |
| |
| case 0x1d: /* Ctrl press */ |
| flags0 |= KF0_CTRLACTIVE; |
| if (flags2 & KF2_LAST_E0) |
| flags2 |= KF2_RCTRL; |
| else |
| flags1 |= KF1_LCTRL; |
| break; |
| case 0x9d: /* Ctrl release */ |
| flags0 &= ~KF0_CTRLACTIVE; |
| if (flags2 & KF2_LAST_E0) |
| flags2 &= ~KF2_RCTRL; |
| else |
| flags1 &= ~KF1_LCTRL; |
| break; |
| |
| case 0x38: /* Alt press */ |
| flags0 |= KF0_ALTACTIVE; |
| if (flags2 & KF2_LAST_E0) |
| flags2 |= KF2_RALT; |
| else |
| flags1 |= KF1_LALT; |
| break; |
| case 0xb8: /* Alt release */ |
| flags0 &= ~KF0_ALTACTIVE; |
| if (flags2 & KF2_LAST_E0) |
| flags2 &= ~KF2_RALT; |
| else |
| flags1 &= ~KF1_LALT; |
| break; |
| |
| case 0x45: /* Num Lock press */ |
| flags1 |= KF1_NUM; |
| flags0 ^= KF0_NUMACTIVE; |
| break; |
| case 0xc5: /* Num Lock release */ |
| flags1 &= ~KF1_NUM; |
| break; |
| |
| case 0x46: /* Scroll Lock press */ |
| flags1 |= KF1_SCROLL; |
| flags0 ^= KF0_SCROLLACTIVE; |
| break; |
| case 0xc6: /* Scroll Lock release */ |
| flags1 &= ~KF1_SCROLL; |
| break; |
| |
| case 0xe0: |
| // Extended key |
| flags2 |= KF2_LAST_E0; |
| SET_BDA(kbd_flag2, flags2); |
| return; |
| case 0xe1: |
| // Start of pause key sequence |
| flags2 |= KF2_LAST_E1; |
| break; |
| |
| default: |
| if (scancode & 0x80) |
| // toss key releases |
| break; |
| if (scancode == 0x53 |
| && ((flags0 & (KF0_CTRLACTIVE|KF0_ALTACTIVE)) |
| == (KF0_CTRLACTIVE|KF0_ALTACTIVE))) { |
| // Ctrl+alt+del - reset machine. |
| SET_BDA(soft_reset_flag, 0x1234); |
| reset_vector(); |
| } |
| if (scancode >= ARRAY_SIZE(scan_to_scanascii)) { |
| dprintf(1, "KBD: int09h_handler(): unknown scancode read: 0x%02x!\n" |
| , scancode); |
| return; |
| } |
| u8 asciicode; |
| struct scaninfo *info = &scan_to_scanascii[scancode]; |
| if (flags0 & KF0_ALTACTIVE) { |
| asciicode = GET_GLOBAL(info->alt); |
| scancode = GET_GLOBAL(info->alt) >> 8; |
| } else if (flags0 & KF0_CTRLACTIVE) { |
| asciicode = GET_GLOBAL(info->control); |
| scancode = GET_GLOBAL(info->control) >> 8; |
| } else if (flags2 & KF2_LAST_E0 |
| && scancode >= 0x47 && scancode <= 0x53) { |
| /* extended keys handling */ |
| asciicode = 0xe0; |
| scancode = GET_GLOBAL(info->normal) >> 8; |
| } else if (flags0 & (KF0_RSHIFT|KF0_LSHIFT)) { |
| /* check if lock state should be ignored because a SHIFT |
| * key is pressed */ |
| |
| if (flags0 & GET_GLOBAL(info->lock_flags)) { |
| asciicode = GET_GLOBAL(info->normal); |
| scancode = GET_GLOBAL(info->normal) >> 8; |
| } else { |
| asciicode = GET_GLOBAL(info->shift); |
| scancode = GET_GLOBAL(info->shift) >> 8; |
| } |
| } else { |
| /* check if lock is on */ |
| if (flags0 & GET_GLOBAL(info->lock_flags)) { |
| asciicode = GET_GLOBAL(info->shift); |
| scancode = GET_GLOBAL(info->shift) >> 8; |
| } else { |
| asciicode = GET_GLOBAL(info->normal); |
| scancode = GET_GLOBAL(info->normal) >> 8; |
| } |
| } |
| if (scancode==0 && asciicode==0) |
| dprintf(1, "KBD: scancode & asciicode are zero?\n"); |
| enqueue_key(scancode, asciicode); |
| break; |
| } |
| flags2 &= ~KF2_LAST_E0; |
| |
| SET_BDA(kbd_flag0, flags0); |
| SET_BDA(kbd_flag1, flags1); |
| SET_BDA(kbd_flag2, flags2); |
| } |
| |
| void |
| process_key(u8 key) |
| { |
| if (!CONFIG_KEYBOARD) |
| return; |
| |
| if (CONFIG_KBD_CALL_INT15_4F) { |
| // allow for keyboard intercept |
| u32 eax = (0x4f << 8) | key; |
| u32 flags; |
| call16_simpint(0x15, &eax, &flags); |
| if (!(flags & F_CF)) |
| return; |
| key = eax; |
| } |
| __process_key(key); |
| } |
