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Kevin O'Connorf076a3e2008-02-25 22:25:15 -05001// 16bit code to handle keyboard requests.
2//
3// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4// Copyright (C) 2002 MandrakeSoft S.A.
5//
Kevin O'Connorb1b7c2a2009-01-15 20:52:58 -05006// This file may be distributed under the terms of the GNU LGPLv3 license.
Kevin O'Connorf076a3e2008-02-25 22:25:15 -05007
Kevin O'Connor9521e262008-07-04 13:04:29 -04008#include "biosvar.h" // GET_BDA
Kevin O'Connor9521e262008-07-04 13:04:29 -04009#include "bregs.h" // struct bregs
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040010#include "config.h" // CONFIG_*
Kevin O'Connor5d369d82013-09-02 20:48:46 -040011#include "hw/ps2port.h" // ps2_kbd_command
12#include "hw/usb-hid.h" // usb_kbd_command
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040013#include "output.h" // debug_enter
Kevin O'Connor12085432014-09-30 09:17:14 -040014#include "stacks.h" // yield
Kevin O'Connorfa9c66a2013-09-14 19:10:40 -040015#include "string.h" // memset
Kevin O'Connor2d2fa312013-09-14 21:55:26 -040016#include "util.h" // kbd_init
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050017
Kevin O'Connor2018eff2008-03-12 21:27:02 -040018void
Kevin O'Connord83c87b2013-01-21 01:14:12 -050019kbd_init(void)
Kevin O'Connor2018eff2008-03-12 21:27:02 -040020{
Kevin O'Connor35192dd2008-06-08 19:18:33 -040021 dprintf(3, "init keyboard\n");
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050022 u16 x = offsetof(struct bios_data_area_s, kbd_buf);
Kevin O'Connor632ebf52016-09-02 16:45:08 -040023 SET_BDA(kbd_flag1, KF1_101KBD);
Kevin O'Connor2018eff2008-03-12 21:27:02 -040024 SET_BDA(kbd_buf_head, x);
25 SET_BDA(kbd_buf_tail, x);
26 SET_BDA(kbd_buf_start_offset, x);
27
28 SET_BDA(kbd_buf_end_offset
29 , x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf));
Kevin O'Connor2018eff2008-03-12 21:27:02 -040030}
31
Gerd Hoffmann90fa5112017-09-18 10:47:20 +020032u8
Kevin O'Connorea5d60a2016-01-10 13:01:48 -050033enqueue_key(u16 keycode)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050034{
Kevin O'Connor4b60c002008-02-25 22:29:55 -050035 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
36 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
37
38 u16 buffer_head = GET_BDA(kbd_buf_head);
39 u16 buffer_tail = GET_BDA(kbd_buf_tail);
40
41 u16 temp_tail = buffer_tail;
42 buffer_tail += 2;
43 if (buffer_tail >= buffer_end)
44 buffer_tail = buffer_start;
45
46 if (buffer_tail == buffer_head)
47 return 0;
48
Kevin O'Connorea5d60a2016-01-10 13:01:48 -050049 SET_FARVAR(SEG_BDA, *(u16*)(temp_tail+0), keycode);
Kevin O'Connor4b60c002008-02-25 22:29:55 -050050 SET_BDA(kbd_buf_tail, buffer_tail);
51 return 1;
52}
53
Kevin O'Connor993f9d32008-12-16 23:47:37 -050054static void
55dequeue_key(struct bregs *regs, int incr, int extended)
Kevin O'Connor4b60c002008-02-25 22:29:55 -050056{
Kevin O'Connor68c51392010-03-13 22:23:44 -050057 yield();
Kevin O'Connor4b60c002008-02-25 22:29:55 -050058 u16 buffer_head;
59 u16 buffer_tail;
60 for (;;) {
61 buffer_head = GET_BDA(kbd_buf_head);
62 buffer_tail = GET_BDA(kbd_buf_tail);
63
64 if (buffer_head != buffer_tail)
65 break;
Kevin O'Connor993f9d32008-12-16 23:47:37 -050066 if (!incr) {
67 regs->flags |= F_ZF;
68 return;
69 }
Kevin O'Connor94c749c2012-05-28 11:44:02 -040070 yield_toirq();
Kevin O'Connor4b60c002008-02-25 22:29:55 -050071 }
72
Kevin O'Connorea5d60a2016-01-10 13:01:48 -050073 u16 keycode = GET_FARVAR(SEG_BDA, *(u16*)(buffer_head+0));
74 u8 ascii = keycode & 0xff;
Kevin O'Connor24903272016-09-02 16:11:23 -040075 if (!extended) {
76 // Translate extended keys
77 if (ascii == 0xe0 && keycode & 0xff00)
78 keycode &= 0xff00;
Kevin O'Connorb47c6e32016-09-02 16:17:14 -040079 else if (keycode == 0xe00d || keycode == 0xe00a)
80 // Extended enter key
81 keycode = 0x1c00 | ascii;
82 else if (keycode == 0xe02f)
83 // Extended '/' key
84 keycode = 0x352f;
Kevin O'Connor24903272016-09-02 16:11:23 -040085 // Technically, if the ascii value is 0xf0 or if the
86 // 'scancode' is greater than 0x84 then the key should be
87 // discarded. However, there seems no harm in passing on the
88 // extended values in these cases.
89 }
90 if (ascii == 0xf0 && keycode & 0xff00)
Kevin O'Connorea5d60a2016-01-10 13:01:48 -050091 keycode &= 0xff00;
92 regs->ax = keycode;
Kevin O'Connor4b60c002008-02-25 22:29:55 -050093
Kevin O'Connor92f95b02008-12-29 20:42:40 -050094 if (!incr) {
Kevin O'Connor993f9d32008-12-16 23:47:37 -050095 regs->flags &= ~F_ZF;
Kevin O'Connor92f95b02008-12-29 20:42:40 -050096 return;
Kevin O'Connor4b60c002008-02-25 22:29:55 -050097 }
Kevin O'Connor92f95b02008-12-29 20:42:40 -050098 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
99 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
100
101 buffer_head += 2;
102 if (buffer_head >= buffer_end)
103 buffer_head = buffer_start;
104 SET_BDA(kbd_buf_head, buffer_head);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500105}
106
Kevin O'Connord488a762012-05-28 14:34:49 -0400107static int
Kevin O'Connordd5a8a62010-05-01 19:59:34 -0400108kbd_command(int command, u8 *param)
109{
110 if (usb_kbd_active())
Kevin O'Connor12085432014-09-30 09:17:14 -0400111 return usb_kbd_command(command, param);
112 return ps2_kbd_command(command, param);
Kevin O'Connordd5a8a62010-05-01 19:59:34 -0400113}
114
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500115// read keyboard input
116static void
117handle_1600(struct bregs *regs)
118{
Kevin O'Connor993f9d32008-12-16 23:47:37 -0500119 dequeue_key(regs, 1, 0);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500120}
121
122// check keyboard status
123static void
124handle_1601(struct bregs *regs)
125{
Kevin O'Connor993f9d32008-12-16 23:47:37 -0500126 dequeue_key(regs, 0, 0);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500127}
128
129// get shift flag status
130static void
131handle_1602(struct bregs *regs)
132{
Kevin O'Connor68c51392010-03-13 22:23:44 -0500133 yield();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500134 regs->al = GET_BDA(kbd_flag0);
135}
136
137// store key-stroke into buffer
138static void
139handle_1605(struct bregs *regs)
140{
Kevin O'Connorea5d60a2016-01-10 13:01:48 -0500141 regs->al = !enqueue_key(regs->cx);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500142}
143
144// GET KEYBOARD FUNCTIONALITY
145static void
146handle_1609(struct bregs *regs)
147{
148 // bit Bochs Description
149 // 7 0 reserved
150 // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
151 // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
152 // 4 1 INT 16/AH=0Ah supported
153 // 3 0 INT 16/AX=0306h supported
154 // 2 0 INT 16/AX=0305h supported
155 // 1 0 INT 16/AX=0304h supported
156 // 0 0 INT 16/AX=0300h supported
157 //
158 regs->al = 0x30;
159}
160
161// GET KEYBOARD ID
Kevin O'Connor8ab4a7d2012-05-28 18:31:39 -0400162static void noinline
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500163handle_160a(struct bregs *regs)
164{
Kevin O'Connor3b897192008-07-20 10:08:59 -0400165 u8 param[2];
166 int ret = kbd_command(ATKBD_CMD_GETID, param);
167 if (ret) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500168 regs->bx = 0;
169 return;
170 }
Kevin O'Connor3b897192008-07-20 10:08:59 -0400171 regs->bx = (param[1] << 8) | param[0];
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500172}
173
174// read MF-II keyboard input
175static void
176handle_1610(struct bregs *regs)
177{
Kevin O'Connor993f9d32008-12-16 23:47:37 -0500178 dequeue_key(regs, 1, 1);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500179}
180
181// check MF-II keyboard status
182static void
183handle_1611(struct bregs *regs)
184{
Kevin O'Connor993f9d32008-12-16 23:47:37 -0500185 dequeue_key(regs, 0, 1);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500186}
187
188// get extended keyboard status
189static void
190handle_1612(struct bregs *regs)
191{
Kevin O'Connor68c51392010-03-13 22:23:44 -0500192 yield();
Kevin O'Connor632ebf52016-09-02 16:45:08 -0400193 regs->ax = ((GET_BDA(kbd_flag0) & ~((KF1_RCTRL|KF1_RALT) << 8))
194 | ((GET_BDA(kbd_flag1) & (KF1_RCTRL|KF1_RALT)) << 8));
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500195 //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
196}
197
198static void
199handle_166f(struct bregs *regs)
200{
201 if (regs->al == 0x08)
202 // unsupported, aka normal keyboard
203 regs->ah = 2;
204}
205
206// keyboard capability check called by DOS 5.0+ keyb
207static void
208handle_1692(struct bregs *regs)
209{
210 // function int16 ah=0x10-0x12 supported
211 regs->ah = 0x80;
212}
213
214// 122 keys capability check called by DOS 5.0+ keyb
215static void
216handle_16a2(struct bregs *regs)
217{
218 // don't change AH : function int16 ah=0x20-0x22 NOT supported
219}
220
221static void
Kevin O'Connor9f4f6402008-07-21 23:40:57 -0400222handle_16XX(struct bregs *regs)
223{
Kevin O'Connordfefeb52009-12-13 13:04:17 -0500224 warn_unimplemented(regs);
Kevin O'Connor9f4f6402008-07-21 23:40:57 -0400225}
226
Kevin O'Connor8ab4a7d2012-05-28 18:31:39 -0400227static void noinline
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500228set_leds(void)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500229{
Kevin O'Connor3b897192008-07-20 10:08:59 -0400230 u8 shift_flags = (GET_BDA(kbd_flag0) >> 4) & 0x07;
Kevin O'Connor6704cf92010-03-13 18:51:46 -0500231 u8 kbd_led = GET_BDA(kbd_led);
Kevin O'Connor3b897192008-07-20 10:08:59 -0400232 u8 led_flags = kbd_led & 0x07;
233 if (shift_flags == led_flags)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500234 return;
235
Kevin O'Connor3b897192008-07-20 10:08:59 -0400236 int ret = kbd_command(ATKBD_CMD_SETLEDS, &shift_flags);
237 if (ret)
238 // Error
239 return;
240 kbd_led = (kbd_led & ~0x07) | shift_flags;
Kevin O'Connor6704cf92010-03-13 18:51:46 -0500241 SET_BDA(kbd_led, kbd_led);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500242}
243
244// INT 16h Keyboard Service Entry Point
Kevin O'Connor19786762008-03-05 21:09:59 -0500245void VISIBLE16
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500246handle_16(struct bregs *regs)
247{
Kevin O'Connor15c1f222008-06-12 22:59:43 -0400248 debug_enter(regs, DEBUG_HDL_16);
Kevin O'Connor40967022008-07-21 22:23:05 -0400249 if (! CONFIG_KEYBOARD)
250 return;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500251
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400252 // XXX - set_leds should be called from irq handler
Kevin O'Connor3b897192008-07-20 10:08:59 -0400253 set_leds();
254
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500255 switch (regs->ah) {
256 case 0x00: handle_1600(regs); break;
257 case 0x01: handle_1601(regs); break;
258 case 0x02: handle_1602(regs); break;
259 case 0x05: handle_1605(regs); break;
260 case 0x09: handle_1609(regs); break;
261 case 0x0a: handle_160a(regs); break;
262 case 0x10: handle_1610(regs); break;
263 case 0x11: handle_1611(regs); break;
264 case 0x12: handle_1612(regs); break;
265 case 0x92: handle_1692(regs); break;
266 case 0xa2: handle_16a2(regs); break;
267 case 0x6f: handle_166f(regs); break;
Kevin O'Connor9f4f6402008-07-21 23:40:57 -0400268 default: handle_16XX(regs); break;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500269 }
270}
271
272#define none 0
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500273
274static struct scaninfo {
275 u16 normal;
276 u16 shift;
277 u16 control;
278 u16 alt;
Kevin O'Connorea5d60a2016-01-10 13:01:48 -0500279} scan_to_keycode[] VAR16 = {
Kevin O'Connor97204842016-01-10 13:26:26 -0500280 { none, none, none, none },
Kevin O'Connor24903272016-09-02 16:11:23 -0400281 { 0x011b, 0x011b, 0x011b, 0x01f0 }, /* escape */
Kevin O'Connor97204842016-01-10 13:26:26 -0500282 { 0x0231, 0x0221, none, 0x7800 }, /* 1! */
283 { 0x0332, 0x0340, 0x0300, 0x7900 }, /* 2@ */
284 { 0x0433, 0x0423, none, 0x7a00 }, /* 3# */
285 { 0x0534, 0x0524, none, 0x7b00 }, /* 4$ */
286 { 0x0635, 0x0625, none, 0x7c00 }, /* 5% */
287 { 0x0736, 0x075e, 0x071e, 0x7d00 }, /* 6^ */
288 { 0x0837, 0x0826, none, 0x7e00 }, /* 7& */
289 { 0x0938, 0x092a, none, 0x7f00 }, /* 8* */
290 { 0x0a39, 0x0a28, none, 0x8000 }, /* 9( */
291 { 0x0b30, 0x0b29, none, 0x8100 }, /* 0) */
292 { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200 }, /* -_ */
293 { 0x0d3d, 0x0d2b, none, 0x8300 }, /* =+ */
Kevin O'Connor24903272016-09-02 16:11:23 -0400294 { 0x0e08, 0x0e08, 0x0e7f, 0x0ef0 }, /* backspace */
295 { 0x0f09, 0x0f00, 0x9400, 0xa5f0 }, /* tab */
Kevin O'Connor97204842016-01-10 13:26:26 -0500296 { 0x1071, 0x1051, 0x1011, 0x1000 }, /* Q */
297 { 0x1177, 0x1157, 0x1117, 0x1100 }, /* W */
298 { 0x1265, 0x1245, 0x1205, 0x1200 }, /* E */
299 { 0x1372, 0x1352, 0x1312, 0x1300 }, /* R */
300 { 0x1474, 0x1454, 0x1414, 0x1400 }, /* T */
301 { 0x1579, 0x1559, 0x1519, 0x1500 }, /* Y */
302 { 0x1675, 0x1655, 0x1615, 0x1600 }, /* U */
303 { 0x1769, 0x1749, 0x1709, 0x1700 }, /* I */
304 { 0x186f, 0x184f, 0x180f, 0x1800 }, /* O */
305 { 0x1970, 0x1950, 0x1910, 0x1900 }, /* P */
Kevin O'Connor24903272016-09-02 16:11:23 -0400306 { 0x1a5b, 0x1a7b, 0x1a1b, 0x1af0 }, /* [{ */
307 { 0x1b5d, 0x1b7d, 0x1b1d, 0x1bf0 }, /* ]} */
308 { 0x1c0d, 0x1c0d, 0x1c0a, 0x1cf0 }, /* Enter */
Kevin O'Connor97204842016-01-10 13:26:26 -0500309 { none, none, none, none }, /* L Ctrl */
310 { 0x1e61, 0x1e41, 0x1e01, 0x1e00 }, /* A */
311 { 0x1f73, 0x1f53, 0x1f13, 0x1f00 }, /* S */
312 { 0x2064, 0x2044, 0x2004, 0x2000 }, /* D */
313 { 0x2166, 0x2146, 0x2106, 0x2100 }, /* F */
314 { 0x2267, 0x2247, 0x2207, 0x2200 }, /* G */
315 { 0x2368, 0x2348, 0x2308, 0x2300 }, /* H */
316 { 0x246a, 0x244a, 0x240a, 0x2400 }, /* J */
317 { 0x256b, 0x254b, 0x250b, 0x2500 }, /* K */
318 { 0x266c, 0x264c, 0x260c, 0x2600 }, /* L */
Kevin O'Connor24903272016-09-02 16:11:23 -0400319 { 0x273b, 0x273a, none, 0x27f0 }, /* ;: */
320 { 0x2827, 0x2822, none, 0x28f0 }, /* '" */
321 { 0x2960, 0x297e, none, 0x29f0 }, /* `~ */
Kevin O'Connor97204842016-01-10 13:26:26 -0500322 { none, none, none, none }, /* L shift */
Kevin O'Connor24903272016-09-02 16:11:23 -0400323 { 0x2b5c, 0x2b7c, 0x2b1c, 0x2bf0 }, /* |\ */
Kevin O'Connor97204842016-01-10 13:26:26 -0500324 { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00 }, /* Z */
325 { 0x2d78, 0x2d58, 0x2d18, 0x2d00 }, /* X */
326 { 0x2e63, 0x2e43, 0x2e03, 0x2e00 }, /* C */
327 { 0x2f76, 0x2f56, 0x2f16, 0x2f00 }, /* V */
328 { 0x3062, 0x3042, 0x3002, 0x3000 }, /* B */
329 { 0x316e, 0x314e, 0x310e, 0x3100 }, /* N */
330 { 0x326d, 0x324d, 0x320d, 0x3200 }, /* M */
Kevin O'Connor24903272016-09-02 16:11:23 -0400331 { 0x332c, 0x333c, none, 0x33f0 }, /* ,< */
332 { 0x342e, 0x343e, none, 0x34f0 }, /* .> */
333 { 0x352f, 0x353f, none, 0x35f0 }, /* /? */
Kevin O'Connor97204842016-01-10 13:26:26 -0500334 { none, none, none, none }, /* R Shift */
Kevin O'Connor24903272016-09-02 16:11:23 -0400335 { 0x372a, 0x372a, 0x9600, 0x37f0 }, /* * */
Kevin O'Connor97204842016-01-10 13:26:26 -0500336 { none, none, none, none }, /* L Alt */
337 { 0x3920, 0x3920, 0x3920, 0x3920 }, /* space */
338 { none, none, none, none }, /* caps lock */
339 { 0x3b00, 0x5400, 0x5e00, 0x6800 }, /* F1 */
340 { 0x3c00, 0x5500, 0x5f00, 0x6900 }, /* F2 */
341 { 0x3d00, 0x5600, 0x6000, 0x6a00 }, /* F3 */
342 { 0x3e00, 0x5700, 0x6100, 0x6b00 }, /* F4 */
343 { 0x3f00, 0x5800, 0x6200, 0x6c00 }, /* F5 */
344 { 0x4000, 0x5900, 0x6300, 0x6d00 }, /* F6 */
345 { 0x4100, 0x5a00, 0x6400, 0x6e00 }, /* F7 */
346 { 0x4200, 0x5b00, 0x6500, 0x6f00 }, /* F8 */
347 { 0x4300, 0x5c00, 0x6600, 0x7000 }, /* F9 */
348 { 0x4400, 0x5d00, 0x6700, 0x7100 }, /* F10 */
349 { none, none, none, none }, /* Num Lock */
350 { none, none, none, none }, /* Scroll Lock */
351 { 0x4700, 0x4737, 0x7700, none }, /* 7 Home */
Kevin O'Connor24903272016-09-02 16:11:23 -0400352 { 0x4800, 0x4838, 0x8d00, none }, /* 8 UP */
Kevin O'Connor97204842016-01-10 13:26:26 -0500353 { 0x4900, 0x4939, 0x8400, none }, /* 9 PgUp */
Kevin O'Connor24903272016-09-02 16:11:23 -0400354 { 0x4a2d, 0x4a2d, 0x8e00, 0x4af0 }, /* - */
Kevin O'Connor97204842016-01-10 13:26:26 -0500355 { 0x4b00, 0x4b34, 0x7300, none }, /* 4 Left */
Kevin O'Connor24903272016-09-02 16:11:23 -0400356 { 0x4c00, 0x4c35, 0x8f00, none }, /* 5 */
Kevin O'Connor97204842016-01-10 13:26:26 -0500357 { 0x4d00, 0x4d36, 0x7400, none }, /* 6 Right */
Kevin O'Connor24903272016-09-02 16:11:23 -0400358 { 0x4e2b, 0x4e2b, 0x9000, 0x4ef0 }, /* + */
Kevin O'Connor97204842016-01-10 13:26:26 -0500359 { 0x4f00, 0x4f31, 0x7500, none }, /* 1 End */
Kevin O'Connor24903272016-09-02 16:11:23 -0400360 { 0x5000, 0x5032, 0x9100, none }, /* 2 Down */
Kevin O'Connor97204842016-01-10 13:26:26 -0500361 { 0x5100, 0x5133, 0x7600, none }, /* 3 PgDn */
Kevin O'Connor24903272016-09-02 16:11:23 -0400362 { 0x5200, 0x5230, 0x9200, none }, /* 0 Ins */
363 { 0x5300, 0x532e, 0x9300, none }, /* Del */
364 { none, none, none, none }, /* SysReq */
Kevin O'Connor97204842016-01-10 13:26:26 -0500365 { none, none, none, none },
366 { 0x565c, 0x567c, none, none }, /* \| */
367 { 0x8500, 0x8700, 0x8900, 0x8b00 }, /* F11 */
368 { 0x8600, 0x8800, 0x8a00, 0x8c00 }, /* F12 */
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500369};
370
Kevin O'Connorb47c6e32016-09-02 16:17:14 -0400371struct scaninfo key_ext_enter VAR16 = {
372 0xe00d, 0xe00d, 0xe00a, 0xa600
373};
374struct scaninfo key_ext_slash VAR16 = {
375 0xe02f, 0xe02f, 0x9500, 0xa400
376};
377
Gerd Hoffmann90fa5112017-09-18 10:47:20 +0200378u16 ascii_to_keycode(u8 ascii)
379{
380 int i;
381
382 for (i = 0; i < ARRAY_SIZE(scan_to_keycode); i++) {
383 if ((GET_GLOBAL(scan_to_keycode[i].normal) & 0xff) == ascii)
384 return GET_GLOBAL(scan_to_keycode[i].normal);
385 if ((GET_GLOBAL(scan_to_keycode[i].shift) & 0xff) == ascii)
386 return GET_GLOBAL(scan_to_keycode[i].shift);
387 if ((GET_GLOBAL(scan_to_keycode[i].control) & 0xff) == ascii)
388 return GET_GLOBAL(scan_to_keycode[i].control);
389 }
390 return 0;
391}
392
393// Handle a ps2 style scancode read from the keyboard.
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400394static void
395kbd_set_flag(int key_release, u16 set_bit0, u8 set_bit1, u16 toggle_bit)
396{
397 u16 flags0 = GET_BDA(kbd_flag0);
398 u8 flags1 = GET_BDA(kbd_flag1);
399 if (key_release) {
400 flags0 &= ~set_bit0;
401 flags1 &= ~set_bit1;
402 } else {
403 flags0 ^= toggle_bit;
404 flags0 |= set_bit0;
405 flags1 |= set_bit1;
406 }
407 SET_BDA(kbd_flag0, flags0);
408 SET_BDA(kbd_flag1, flags1);
409}
410
Kevin O'Connor1bdc9ae2016-09-05 13:38:26 -0400411static void
412kbd_ctrl_break(int key_release)
413{
414 if (!key_release)
415 return;
416 // Clear keyboard buffer and place 0x0000 in buffer
417 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
418 SET_BDA(kbd_buf_head, buffer_start);
419 SET_BDA(kbd_buf_tail, buffer_start+2);
420 SET_FARVAR(SEG_BDA, *(u16*)(buffer_start+0), 0x0000);
421 // Set break flag
422 SET_BDA(break_flag, 0x80);
423 // Generate int 0x1b
424 struct bregs br;
425 memset(&br, 0, sizeof(br));
426 br.flags = F_IF;
427 call16_int(0x1b, &br);
428}
429
430static void
431kbd_sysreq(int key_release)
432{
433 // SysReq generates int 0x15/0x85
434 struct bregs br;
435 memset(&br, 0, sizeof(br));
436 br.ah = 0x85;
437 br.al = key_release ? 0x01 : 0x00;
438 br.flags = F_IF;
439 call16_int(0x15, &br);
440}
441
442static void
443kbd_prtscr(int key_release)
444{
445 if (key_release)
446 return;
447 // PrtScr generates int 0x05 (ctrl-prtscr has keycode 0x7200?)
448 struct bregs br;
449 memset(&br, 0, sizeof(br));
450 br.flags = F_IF;
451 call16_int(0x05, &br);
452}
453
Kevin O'Connorac7eb5e2012-05-28 14:42:16 -0400454// Handle a ps2 style scancode read from the keyboard.
455static void
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400456__process_key(u8 scancode)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500457{
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400458 // Check for multi-scancode key sequences
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400459 u8 flags1 = GET_BDA(kbd_flag1);
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400460 if (scancode == 0xe0 || scancode == 0xe1) {
461 // Start of two byte extended (e0) or three byte pause key (e1) sequence
462 u8 eflag = scancode == 0xe0 ? KF1_LAST_E0 : KF1_LAST_E1;
463 SET_BDA(kbd_flag1, flags1 | eflag);
464 return;
Kevin O'Connorb532d722009-09-11 17:00:31 -0400465 }
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400466 int key_release = scancode & 0x80;
467 scancode &= ~0x80;
468 if (flags1 & (KF1_LAST_E0|KF1_LAST_E1)) {
469 if (flags1 & KF1_LAST_E1 && scancode == 0x1d)
470 // Ignore second byte of pause key (e1 1d 45 / e1 9d c5)
471 return;
472 // Clear E0/E1 flag in memory for next key event
473 SET_BDA(kbd_flag1, flags1 & ~(KF1_LAST_E0|KF1_LAST_E1));
474 }
Kevin O'Connorb532d722009-09-11 17:00:31 -0400475
Kevin O'Connorfec21402016-09-02 20:58:11 -0400476 // Check for special keys
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500477 switch (scancode) {
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400478 case 0x3a: /* Caps Lock */
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400479 kbd_set_flag(key_release, KF0_CAPS, 0, KF0_CAPSACTIVE);
480 return;
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400481 case 0x2a: /* L Shift */
Kevin O'Connor6cd69b72016-09-05 11:56:03 -0400482 if (flags1 & KF1_LAST_E0)
483 // Ignore fake shifts
484 return;
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400485 kbd_set_flag(key_release, KF0_LSHIFT, 0, 0);
486 return;
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400487 case 0x36: /* R Shift */
Kevin O'Connor6cd69b72016-09-05 11:56:03 -0400488 if (flags1 & KF1_LAST_E0)
489 // Ignore fake shifts
490 return;
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400491 kbd_set_flag(key_release, KF0_RSHIFT, 0, 0);
492 return;
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400493 case 0x1d: /* Ctrl */
Kevin O'Connor632ebf52016-09-02 16:45:08 -0400494 if (flags1 & KF1_LAST_E0)
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400495 kbd_set_flag(key_release, KF0_CTRLACTIVE, KF1_RCTRL, 0);
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400496 else
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400497 kbd_set_flag(key_release, KF0_CTRLACTIVE | KF0_LCTRL, 0, 0);
498 return;
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400499 case 0x38: /* Alt */
Kevin O'Connor632ebf52016-09-02 16:45:08 -0400500 if (flags1 & KF1_LAST_E0)
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400501 kbd_set_flag(key_release, KF0_ALTACTIVE, KF1_RALT, 0);
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400502 else
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400503 kbd_set_flag(key_release, KF0_ALTACTIVE | KF0_LALT, 0, 0);
504 return;
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400505 case 0x45: /* Num Lock */
Kevin O'Connorfec21402016-09-02 20:58:11 -0400506 if (flags1 & KF1_LAST_E1)
507 // XXX - pause key.
508 return;
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400509 kbd_set_flag(key_release, KF0_NUM, 0, KF0_NUMACTIVE);
510 return;
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400511 case 0x46: /* Scroll Lock */
Kevin O'Connor1bdc9ae2016-09-05 13:38:26 -0400512 if (flags1 & KF1_LAST_E0) {
513 kbd_ctrl_break(key_release);
Kevin O'Connorfec21402016-09-02 20:58:11 -0400514 return;
Kevin O'Connor1bdc9ae2016-09-05 13:38:26 -0400515 }
Kevin O'Connore8c0c612016-09-02 18:18:08 -0400516 kbd_set_flag(key_release, KF0_SCROLL, 0, KF0_SCROLLACTIVE);
517 return;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500518
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400519 case 0x37: /* * */
Kevin O'Connor1bdc9ae2016-09-05 13:38:26 -0400520 if (flags1 & KF1_LAST_E0) {
521 kbd_prtscr(key_release);
Kevin O'Connorfec21402016-09-02 20:58:11 -0400522 return;
Kevin O'Connor1bdc9ae2016-09-05 13:38:26 -0400523 }
Kevin O'Connorfec21402016-09-02 20:58:11 -0400524 break;
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400525 case 0x54: /* SysReq */
Kevin O'Connor1bdc9ae2016-09-05 13:38:26 -0400526 kbd_sysreq(key_release);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500527 return;
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400528 case 0x53: /* Del */
Kevin O'Connorfec21402016-09-02 20:58:11 -0400529 if ((GET_BDA(kbd_flag0) & (KF0_CTRLACTIVE|KF0_ALTACTIVE))
Kevin O'Connor8d8d4832016-09-12 10:43:30 -0400530 == (KF0_CTRLACTIVE|KF0_ALTACTIVE) && !key_release) {
Kevin O'Connor3f168b62008-11-29 13:22:29 -0500531 // Ctrl+alt+del - reset machine.
Kevin O'Connor885e2dd2009-01-21 19:14:20 -0500532 SET_BDA(soft_reset_flag, 0x1234);
Kevin O'Connor43197a22014-06-06 13:49:33 -0400533 reset();
Kevin O'Connor885e2dd2009-01-21 19:14:20 -0500534 }
Kevin O'Connorfec21402016-09-02 20:58:11 -0400535 break;
536
537 default:
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500538 break;
539 }
Kevin O'Connorfec21402016-09-02 20:58:11 -0400540
541 // Handle generic keys
542 if (key_release)
543 // ignore key releases
544 return;
545 if (!scancode || scancode >= ARRAY_SIZE(scan_to_keycode)) {
546 dprintf(1, "__process_key unknown scancode read: 0x%02x!\n", scancode);
547 return;
548 }
549 struct scaninfo *info = &scan_to_keycode[scancode];
550 if (flags1 & KF1_LAST_E0 && (scancode == 0x1c || scancode == 0x35))
551 info = (scancode == 0x1c ? &key_ext_enter : &key_ext_slash);
552 u16 flags0 = GET_BDA(kbd_flag0);
553 u16 keycode;
554 if (flags0 & KF0_ALTACTIVE) {
555 keycode = GET_GLOBAL(info->alt);
556 } else if (flags0 & KF0_CTRLACTIVE) {
557 keycode = GET_GLOBAL(info->control);
558 } else {
559 u8 useshift = flags0 & (KF0_RSHIFT|KF0_LSHIFT) ? 1 : 0;
560 u8 ascii = GET_GLOBAL(info->normal) & 0xff;
561 if ((flags0 & KF0_NUMACTIVE && scancode >= 0x47 && scancode <= 0x53)
562 || (flags0 & KF0_CAPSACTIVE && ascii >= 'a' && ascii <= 'z'))
563 // Numlock/capslock toggles shift on certain keys
564 useshift ^= 1;
565 if (useshift)
566 keycode = GET_GLOBAL(info->shift);
567 else
568 keycode = GET_GLOBAL(info->normal);
569 }
570 if (flags1 & KF1_LAST_E0 && scancode >= 0x47 && scancode <= 0x53) {
571 /* extended keys handling */
572 if (flags0 & KF0_ALTACTIVE)
573 keycode = (scancode + 0x50) << 8;
574 else
575 keycode = (keycode & 0xff00) | 0xe0;
576 }
577 if (keycode)
578 enqueue_key(keycode);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500579}
580
Kevin O'Connor114592f2009-09-28 21:32:08 -0400581void
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400582process_key(u8 key)
583{
Kevin O'Connor57877482009-12-09 21:00:41 -0500584 if (!CONFIG_KEYBOARD)
585 return;
586
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400587 if (CONFIG_KBD_CALL_INT15_4F) {
588 // allow for keyboard intercept
Kevin O'Connorecdc6552012-05-28 14:25:15 -0400589 struct bregs br;
590 memset(&br, 0, sizeof(br));
591 br.eax = (0x4f << 8) | key;
592 br.flags = F_IF|F_CF;
593 call16_int(0x15, &br);
594 if (!(br.flags & F_CF))
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400595 return;
Kevin O'Connorecdc6552012-05-28 14:25:15 -0400596 key = br.eax;
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400597 }
598 __process_key(key);
599}