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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'Connor3df600b2013-09-14 19:28:55 -040014#include "stacks.h" // stack_hop
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'Connor6704cf92010-03-13 18:51:46 -050018// Bit definitions for BDA kbd_flag[012]
19#define KF0_RSHIFT (1<<0)
20#define KF0_LSHIFT (1<<1)
21#define KF0_CTRLACTIVE (1<<2)
22#define KF0_ALTACTIVE (1<<3)
23#define KF0_SCROLLACTIVE (1<<4)
24#define KF0_NUMACTIVE (1<<5)
25#define KF0_CAPSACTIVE (1<<6)
26
27#define KF1_LCTRL (1<<0)
28#define KF1_LALT (1<<1)
29#define KF1_PAUSEACTIVE (1<<3)
30#define KF1_SCROLL (1<<4)
31#define KF1_NUM (1<<5)
32#define KF1_CAPS (1<<6)
33
34#define KF2_LAST_E1 (1<<0)
35#define KF2_LAST_E0 (1<<1)
36#define KF2_RCTRL (1<<2)
37#define KF2_RALT (1<<3)
38#define KF2_101KBD (1<<4)
39
Kevin O'Connor2018eff2008-03-12 21:27:02 -040040void
Kevin O'Connord83c87b2013-01-21 01:14:12 -050041kbd_init(void)
Kevin O'Connor2018eff2008-03-12 21:27:02 -040042{
Kevin O'Connor35192dd2008-06-08 19:18:33 -040043 dprintf(3, "init keyboard\n");
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050044 u16 x = offsetof(struct bios_data_area_s, kbd_buf);
Kevin O'Connor40c0e482009-09-11 02:06:02 -040045 SET_BDA(kbd_flag2, KF2_101KBD);
Kevin O'Connor2018eff2008-03-12 21:27:02 -040046 SET_BDA(kbd_buf_head, x);
47 SET_BDA(kbd_buf_tail, x);
48 SET_BDA(kbd_buf_start_offset, x);
49
50 SET_BDA(kbd_buf_end_offset
51 , x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf));
Kevin O'Connor2018eff2008-03-12 21:27:02 -040052}
53
Kevin O'Connor4b60c002008-02-25 22:29:55 -050054static u8
55enqueue_key(u8 scan_code, u8 ascii_code)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050056{
Kevin O'Connor4b60c002008-02-25 22:29:55 -050057 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
58 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
59
60 u16 buffer_head = GET_BDA(kbd_buf_head);
61 u16 buffer_tail = GET_BDA(kbd_buf_tail);
62
63 u16 temp_tail = buffer_tail;
64 buffer_tail += 2;
65 if (buffer_tail >= buffer_end)
66 buffer_tail = buffer_start;
67
68 if (buffer_tail == buffer_head)
69 return 0;
70
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050071 SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0), ascii_code);
72 SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+1), scan_code);
Kevin O'Connor4b60c002008-02-25 22:29:55 -050073 SET_BDA(kbd_buf_tail, buffer_tail);
74 return 1;
75}
76
Kevin O'Connor993f9d32008-12-16 23:47:37 -050077static void
78dequeue_key(struct bregs *regs, int incr, int extended)
Kevin O'Connor4b60c002008-02-25 22:29:55 -050079{
Kevin O'Connor68c51392010-03-13 22:23:44 -050080 yield();
Kevin O'Connor4b60c002008-02-25 22:29:55 -050081 u16 buffer_head;
82 u16 buffer_tail;
83 for (;;) {
84 buffer_head = GET_BDA(kbd_buf_head);
85 buffer_tail = GET_BDA(kbd_buf_tail);
86
87 if (buffer_head != buffer_tail)
88 break;
Kevin O'Connor993f9d32008-12-16 23:47:37 -050089 if (!incr) {
90 regs->flags |= F_ZF;
91 return;
92 }
Kevin O'Connor94c749c2012-05-28 11:44:02 -040093 yield_toirq();
Kevin O'Connor4b60c002008-02-25 22:29:55 -050094 }
95
Kevin O'Connor8c0e3722009-01-02 14:19:43 -050096 u8 ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0));
97 u8 scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+1));
Kevin O'Connor993f9d32008-12-16 23:47:37 -050098 if ((ascii_code == 0xF0 && scan_code != 0)
99 || (ascii_code == 0xE0 && !extended))
100 ascii_code = 0;
101 regs->ax = (scan_code << 8) | ascii_code;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500102
Kevin O'Connor92f95b02008-12-29 20:42:40 -0500103 if (!incr) {
Kevin O'Connor993f9d32008-12-16 23:47:37 -0500104 regs->flags &= ~F_ZF;
Kevin O'Connor92f95b02008-12-29 20:42:40 -0500105 return;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500106 }
Kevin O'Connor92f95b02008-12-29 20:42:40 -0500107 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
108 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
109
110 buffer_head += 2;
111 if (buffer_head >= buffer_end)
112 buffer_head = buffer_start;
113 SET_BDA(kbd_buf_head, buffer_head);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500114}
115
Kevin O'Connord488a762012-05-28 14:34:49 -0400116static int
Kevin O'Connordd5a8a62010-05-01 19:59:34 -0400117kbd_command(int command, u8 *param)
118{
119 if (usb_kbd_active())
Kevin O'Connord488a762012-05-28 14:34:49 -0400120 return stack_hop(command, (u32)param, usb_kbd_command);
121 return stack_hop(command, (u32)param, ps2_kbd_command);
Kevin O'Connordd5a8a62010-05-01 19:59:34 -0400122}
123
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500124// read keyboard input
125static void
126handle_1600(struct bregs *regs)
127{
Kevin O'Connor993f9d32008-12-16 23:47:37 -0500128 dequeue_key(regs, 1, 0);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500129}
130
131// check keyboard status
132static void
133handle_1601(struct bregs *regs)
134{
Kevin O'Connor993f9d32008-12-16 23:47:37 -0500135 dequeue_key(regs, 0, 0);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500136}
137
138// get shift flag status
139static void
140handle_1602(struct bregs *regs)
141{
Kevin O'Connor68c51392010-03-13 22:23:44 -0500142 yield();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500143 regs->al = GET_BDA(kbd_flag0);
144}
145
146// store key-stroke into buffer
147static void
148handle_1605(struct bregs *regs)
149{
150 regs->al = !enqueue_key(regs->ch, regs->cl);
151}
152
153// GET KEYBOARD FUNCTIONALITY
154static void
155handle_1609(struct bregs *regs)
156{
157 // bit Bochs Description
158 // 7 0 reserved
159 // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
160 // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
161 // 4 1 INT 16/AH=0Ah supported
162 // 3 0 INT 16/AX=0306h supported
163 // 2 0 INT 16/AX=0305h supported
164 // 1 0 INT 16/AX=0304h supported
165 // 0 0 INT 16/AX=0300h supported
166 //
167 regs->al = 0x30;
168}
169
170// GET KEYBOARD ID
Kevin O'Connor8ab4a7d2012-05-28 18:31:39 -0400171static void noinline
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500172handle_160a(struct bregs *regs)
173{
Kevin O'Connor3b897192008-07-20 10:08:59 -0400174 u8 param[2];
175 int ret = kbd_command(ATKBD_CMD_GETID, param);
176 if (ret) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500177 regs->bx = 0;
178 return;
179 }
Kevin O'Connor3b897192008-07-20 10:08:59 -0400180 regs->bx = (param[1] << 8) | param[0];
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500181}
182
183// read MF-II keyboard input
184static void
185handle_1610(struct bregs *regs)
186{
Kevin O'Connor993f9d32008-12-16 23:47:37 -0500187 dequeue_key(regs, 1, 1);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500188}
189
190// check MF-II keyboard status
191static void
192handle_1611(struct bregs *regs)
193{
Kevin O'Connor993f9d32008-12-16 23:47:37 -0500194 dequeue_key(regs, 0, 1);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500195}
196
197// get extended keyboard status
198static void
199handle_1612(struct bregs *regs)
200{
Kevin O'Connor68c51392010-03-13 22:23:44 -0500201 yield();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500202 regs->al = GET_BDA(kbd_flag0);
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400203 regs->ah = ((GET_BDA(kbd_flag1) & ~(KF2_RCTRL|KF2_RALT))
204 | (GET_BDA(kbd_flag2) & (KF2_RCTRL|KF2_RALT)));
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500205 //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
206}
207
208static void
209handle_166f(struct bregs *regs)
210{
211 if (regs->al == 0x08)
212 // unsupported, aka normal keyboard
213 regs->ah = 2;
214}
215
216// keyboard capability check called by DOS 5.0+ keyb
217static void
218handle_1692(struct bregs *regs)
219{
220 // function int16 ah=0x10-0x12 supported
221 regs->ah = 0x80;
222}
223
224// 122 keys capability check called by DOS 5.0+ keyb
225static void
226handle_16a2(struct bregs *regs)
227{
228 // don't change AH : function int16 ah=0x20-0x22 NOT supported
229}
230
231static void
Kevin O'Connor9f4f6402008-07-21 23:40:57 -0400232handle_16XX(struct bregs *regs)
233{
Kevin O'Connordfefeb52009-12-13 13:04:17 -0500234 warn_unimplemented(regs);
Kevin O'Connor9f4f6402008-07-21 23:40:57 -0400235}
236
Kevin O'Connor8ab4a7d2012-05-28 18:31:39 -0400237static void noinline
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500238set_leds(void)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500239{
Kevin O'Connor3b897192008-07-20 10:08:59 -0400240 u8 shift_flags = (GET_BDA(kbd_flag0) >> 4) & 0x07;
Kevin O'Connor6704cf92010-03-13 18:51:46 -0500241 u8 kbd_led = GET_BDA(kbd_led);
Kevin O'Connor3b897192008-07-20 10:08:59 -0400242 u8 led_flags = kbd_led & 0x07;
243 if (shift_flags == led_flags)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500244 return;
245
Kevin O'Connor3b897192008-07-20 10:08:59 -0400246 int ret = kbd_command(ATKBD_CMD_SETLEDS, &shift_flags);
247 if (ret)
248 // Error
249 return;
250 kbd_led = (kbd_led & ~0x07) | shift_flags;
Kevin O'Connor6704cf92010-03-13 18:51:46 -0500251 SET_BDA(kbd_led, kbd_led);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500252}
253
254// INT 16h Keyboard Service Entry Point
Kevin O'Connor19786762008-03-05 21:09:59 -0500255void VISIBLE16
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500256handle_16(struct bregs *regs)
257{
Kevin O'Connor15c1f222008-06-12 22:59:43 -0400258 debug_enter(regs, DEBUG_HDL_16);
Kevin O'Connor40967022008-07-21 22:23:05 -0400259 if (! CONFIG_KEYBOARD)
260 return;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500261
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400262 // XXX - set_leds should be called from irq handler
Kevin O'Connor3b897192008-07-20 10:08:59 -0400263 set_leds();
264
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500265 switch (regs->ah) {
266 case 0x00: handle_1600(regs); break;
267 case 0x01: handle_1601(regs); break;
268 case 0x02: handle_1602(regs); break;
269 case 0x05: handle_1605(regs); break;
270 case 0x09: handle_1609(regs); break;
271 case 0x0a: handle_160a(regs); break;
272 case 0x10: handle_1610(regs); break;
273 case 0x11: handle_1611(regs); break;
274 case 0x12: handle_1612(regs); break;
275 case 0x92: handle_1692(regs); break;
276 case 0xa2: handle_16a2(regs); break;
277 case 0x6f: handle_166f(regs); break;
Kevin O'Connor9f4f6402008-07-21 23:40:57 -0400278 default: handle_16XX(regs); break;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500279 }
280}
281
282#define none 0
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400283#define MNUM KF0_NUMACTIVE
284#define MCAP KF0_CAPSACTIVE
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500285
286static struct scaninfo {
287 u16 normal;
288 u16 shift;
289 u16 control;
290 u16 alt;
291 u8 lock_flags;
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400292} scan_to_scanascii[] VAR16 = {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500293 { none, none, none, none, none },
294 { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
295 { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
296 { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
297 { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
298 { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
299 { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
300 { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
301 { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
302 { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
303 { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
304 { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
305 { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
306 { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
307 { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
308 { 0x0f09, 0x0f00, none, none, none }, /* tab */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400309 { 0x1071, 0x1051, 0x1011, 0x1000, MCAP }, /* Q */
310 { 0x1177, 0x1157, 0x1117, 0x1100, MCAP }, /* W */
311 { 0x1265, 0x1245, 0x1205, 0x1200, MCAP }, /* E */
312 { 0x1372, 0x1352, 0x1312, 0x1300, MCAP }, /* R */
313 { 0x1474, 0x1454, 0x1414, 0x1400, MCAP }, /* T */
314 { 0x1579, 0x1559, 0x1519, 0x1500, MCAP }, /* Y */
315 { 0x1675, 0x1655, 0x1615, 0x1600, MCAP }, /* U */
316 { 0x1769, 0x1749, 0x1709, 0x1700, MCAP }, /* I */
317 { 0x186f, 0x184f, 0x180f, 0x1800, MCAP }, /* O */
318 { 0x1970, 0x1950, 0x1910, 0x1900, MCAP }, /* P */
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500319 { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
320 { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
321 { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
322 { none, none, none, none, none }, /* L Ctrl */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400323 { 0x1e61, 0x1e41, 0x1e01, 0x1e00, MCAP }, /* A */
324 { 0x1f73, 0x1f53, 0x1f13, 0x1f00, MCAP }, /* S */
325 { 0x2064, 0x2044, 0x2004, 0x2000, MCAP }, /* D */
326 { 0x2166, 0x2146, 0x2106, 0x2100, MCAP }, /* F */
327 { 0x2267, 0x2247, 0x2207, 0x2200, MCAP }, /* G */
328 { 0x2368, 0x2348, 0x2308, 0x2300, MCAP }, /* H */
329 { 0x246a, 0x244a, 0x240a, 0x2400, MCAP }, /* J */
330 { 0x256b, 0x254b, 0x250b, 0x2500, MCAP }, /* K */
331 { 0x266c, 0x264c, 0x260c, 0x2600, MCAP }, /* L */
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500332 { 0x273b, 0x273a, none, none, none }, /* ;: */
333 { 0x2827, 0x2822, none, none, none }, /* '" */
334 { 0x2960, 0x297e, none, none, none }, /* `~ */
335 { none, none, none, none, none }, /* L shift */
336 { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400337 { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, MCAP }, /* Z */
338 { 0x2d78, 0x2d58, 0x2d18, 0x2d00, MCAP }, /* X */
339 { 0x2e63, 0x2e43, 0x2e03, 0x2e00, MCAP }, /* C */
340 { 0x2f76, 0x2f56, 0x2f16, 0x2f00, MCAP }, /* V */
341 { 0x3062, 0x3042, 0x3002, 0x3000, MCAP }, /* B */
342 { 0x316e, 0x314e, 0x310e, 0x3100, MCAP }, /* N */
343 { 0x326d, 0x324d, 0x320d, 0x3200, MCAP }, /* M */
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500344 { 0x332c, 0x333c, none, none, none }, /* ,< */
345 { 0x342e, 0x343e, none, none, none }, /* .> */
346 { 0x352f, 0x353f, none, none, none }, /* /? */
347 { none, none, none, none, none }, /* R Shift */
348 { 0x372a, 0x372a, none, none, none }, /* * */
349 { none, none, none, none, none }, /* L Alt */
350 { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
351 { none, none, none, none, none }, /* caps lock */
352 { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
353 { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
354 { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
355 { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
356 { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
357 { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
358 { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
359 { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
360 { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
361 { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
362 { none, none, none, none, none }, /* Num Lock */
363 { none, none, none, none, none }, /* Scroll Lock */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400364 { 0x4700, 0x4737, 0x7700, none, MNUM }, /* 7 Home */
365 { 0x4800, 0x4838, none, none, MNUM }, /* 8 UP */
366 { 0x4900, 0x4939, 0x8400, none, MNUM }, /* 9 PgUp */
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500367 { 0x4a2d, 0x4a2d, none, none, none }, /* - */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400368 { 0x4b00, 0x4b34, 0x7300, none, MNUM }, /* 4 Left */
369 { 0x4c00, 0x4c35, none, none, MNUM }, /* 5 */
370 { 0x4d00, 0x4d36, 0x7400, none, MNUM }, /* 6 Right */
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500371 { 0x4e2b, 0x4e2b, none, none, none }, /* + */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400372 { 0x4f00, 0x4f31, 0x7500, none, MNUM }, /* 1 End */
373 { 0x5000, 0x5032, none, none, MNUM }, /* 2 Down */
374 { 0x5100, 0x5133, 0x7600, none, MNUM }, /* 3 PgDn */
375 { 0x5200, 0x5230, none, none, MNUM }, /* 0 Ins */
376 { 0x5300, 0x532e, none, none, MNUM }, /* Del */
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500377 { none, none, none, none, none },
378 { none, none, none, none, none },
379 { 0x565c, 0x567c, none, none, none }, /* \| */
Kevin O'Connor7c774172008-10-25 14:38:31 -0400380 { 0x8500, 0x8700, 0x8900, 0x8b00, none }, /* F11 */
381 { 0x8600, 0x8800, 0x8a00, 0x8c00, none }, /* F12 */
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500382};
383
Kevin O'Connorac7eb5e2012-05-28 14:42:16 -0400384// Handle a ps2 style scancode read from the keyboard.
385static void
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400386__process_key(u8 scancode)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500387{
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400388 u8 flags0 = GET_BDA(kbd_flag0);
389 u8 flags1 = GET_BDA(kbd_flag1);
390 u8 flags2 = GET_BDA(kbd_flag2);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500391
Kevin O'Connorb532d722009-09-11 17:00:31 -0400392 if (flags2 & KF2_LAST_E1) {
393 // Part of "pause" key (sequence is e1 1d 45 e1 9d c5)
394 if ((scancode & ~0x80) == 0x1d)
395 // Second key of sequence
396 return;
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400397 // Third key of sequence - clear flag.
Kevin O'Connorb532d722009-09-11 17:00:31 -0400398 flags2 &= ~KF2_LAST_E1;
399 SET_BDA(kbd_flag2, flags2);
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400400
401 if (scancode == 0xc5) {
402 // Final key in sequence.
403
404 // XXX - do actual pause.
405 }
Kevin O'Connorb532d722009-09-11 17:00:31 -0400406 return;
407 }
408
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400409 // XXX - PrtScr should cause int 0x05
410 // XXX - Ctrl+Break should cause int 0x1B
411 // XXX - SysReq should cause int 0x15/0x85
412
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500413 switch (scancode) {
414 case 0x00:
Kevin O'Connorac8df8c2008-05-24 23:46:33 -0400415 dprintf(1, "KBD: int09 handler: AL=0\n");
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500416 return;
417
418 case 0x3a: /* Caps Lock press */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400419 flags0 ^= KF0_CAPSACTIVE;
420 flags1 |= KF1_CAPS;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500421 break;
422 case 0xba: /* Caps Lock release */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400423 flags1 &= ~KF1_CAPS;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500424 break;
425
426 case 0x2a: /* L Shift press */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400427 flags0 |= KF0_LSHIFT;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500428 break;
429 case 0xaa: /* L Shift release */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400430 flags0 &= ~KF0_LSHIFT;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500431 break;
432
433 case 0x36: /* R Shift press */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400434 flags0 |= KF0_RSHIFT;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500435 break;
436 case 0xb6: /* R Shift release */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400437 flags0 &= ~KF0_RSHIFT;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500438 break;
439
440 case 0x1d: /* Ctrl press */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400441 flags0 |= KF0_CTRLACTIVE;
442 if (flags2 & KF2_LAST_E0)
443 flags2 |= KF2_RCTRL;
444 else
445 flags1 |= KF1_LCTRL;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500446 break;
447 case 0x9d: /* Ctrl release */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400448 flags0 &= ~KF0_CTRLACTIVE;
449 if (flags2 & KF2_LAST_E0)
450 flags2 &= ~KF2_RCTRL;
451 else
452 flags1 &= ~KF1_LCTRL;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500453 break;
454
455 case 0x38: /* Alt press */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400456 flags0 |= KF0_ALTACTIVE;
457 if (flags2 & KF2_LAST_E0)
458 flags2 |= KF2_RALT;
459 else
460 flags1 |= KF1_LALT;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500461 break;
462 case 0xb8: /* Alt release */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400463 flags0 &= ~KF0_ALTACTIVE;
464 if (flags2 & KF2_LAST_E0)
465 flags2 &= ~KF2_RALT;
466 else
467 flags1 &= ~KF1_LALT;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500468 break;
469
470 case 0x45: /* Num Lock press */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400471 flags1 |= KF1_NUM;
472 flags0 ^= KF0_NUMACTIVE;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500473 break;
474 case 0xc5: /* Num Lock release */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400475 flags1 &= ~KF1_NUM;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500476 break;
477
478 case 0x46: /* Scroll Lock press */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400479 flags1 |= KF1_SCROLL;
480 flags0 ^= KF0_SCROLLACTIVE;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500481 break;
482 case 0xc6: /* Scroll Lock release */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400483 flags1 &= ~KF1_SCROLL;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500484 break;
485
486 case 0xe0:
487 // Extended key
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400488 flags2 |= KF2_LAST_E0;
489 SET_BDA(kbd_flag2, flags2);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500490 return;
491 case 0xe1:
Kevin O'Connorb532d722009-09-11 17:00:31 -0400492 // Start of pause key sequence
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400493 flags2 |= KF2_LAST_E1;
Kevin O'Connorb532d722009-09-11 17:00:31 -0400494 break;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500495
496 default:
Kevin O'Connor3f168b62008-11-29 13:22:29 -0500497 if (scancode & 0x80)
498 // toss key releases
499 break;
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400500 if (scancode == 0x53
501 && ((flags0 & (KF0_CTRLACTIVE|KF0_ALTACTIVE))
502 == (KF0_CTRLACTIVE|KF0_ALTACTIVE))) {
Kevin O'Connor3f168b62008-11-29 13:22:29 -0500503 // Ctrl+alt+del - reset machine.
Kevin O'Connor885e2dd2009-01-21 19:14:20 -0500504 SET_BDA(soft_reset_flag, 0x1234);
Kevin O'Connor3f168b62008-11-29 13:22:29 -0500505 reset_vector();
Kevin O'Connor885e2dd2009-01-21 19:14:20 -0500506 }
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400507 if (scancode >= ARRAY_SIZE(scan_to_scanascii)) {
Kevin O'Connorac8df8c2008-05-24 23:46:33 -0400508 dprintf(1, "KBD: int09h_handler(): unknown scancode read: 0x%02x!\n"
Kevin O'Connor438f6352008-03-30 21:46:53 -0400509 , scancode);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500510 return;
511 }
512 u8 asciicode;
513 struct scaninfo *info = &scan_to_scanascii[scancode];
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400514 if (flags0 & KF0_ALTACTIVE) {
Kevin O'Connor15157a32008-12-13 11:10:37 -0500515 asciicode = GET_GLOBAL(info->alt);
516 scancode = GET_GLOBAL(info->alt) >> 8;
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400517 } else if (flags0 & KF0_CTRLACTIVE) {
Kevin O'Connor15157a32008-12-13 11:10:37 -0500518 asciicode = GET_GLOBAL(info->control);
519 scancode = GET_GLOBAL(info->control) >> 8;
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400520 } else if (flags2 & KF2_LAST_E0
Kevin O'Connor438f6352008-03-30 21:46:53 -0400521 && scancode >= 0x47 && scancode <= 0x53) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500522 /* extended keys handling */
523 asciicode = 0xe0;
Kevin O'Connor15157a32008-12-13 11:10:37 -0500524 scancode = GET_GLOBAL(info->normal) >> 8;
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400525 } else if (flags0 & (KF0_RSHIFT|KF0_LSHIFT)) {
Kevin O'Connorb532d722009-09-11 17:00:31 -0400526 /* check if lock state should be ignored because a SHIFT
527 * key is pressed */
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500528
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400529 if (flags0 & GET_GLOBAL(info->lock_flags)) {
Kevin O'Connor15157a32008-12-13 11:10:37 -0500530 asciicode = GET_GLOBAL(info->normal);
531 scancode = GET_GLOBAL(info->normal) >> 8;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500532 } else {
Kevin O'Connor15157a32008-12-13 11:10:37 -0500533 asciicode = GET_GLOBAL(info->shift);
534 scancode = GET_GLOBAL(info->shift) >> 8;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500535 }
536 } else {
537 /* check if lock is on */
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400538 if (flags0 & GET_GLOBAL(info->lock_flags)) {
Kevin O'Connor15157a32008-12-13 11:10:37 -0500539 asciicode = GET_GLOBAL(info->shift);
540 scancode = GET_GLOBAL(info->shift) >> 8;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500541 } else {
Kevin O'Connor15157a32008-12-13 11:10:37 -0500542 asciicode = GET_GLOBAL(info->normal);
543 scancode = GET_GLOBAL(info->normal) >> 8;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500544 }
545 }
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400546 if (scancode==0 && asciicode==0)
547 dprintf(1, "KBD: scancode & asciicode are zero?\n");
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500548 enqueue_key(scancode, asciicode);
549 break;
550 }
Kevin O'Connor40c0e482009-09-11 02:06:02 -0400551 flags2 &= ~KF2_LAST_E0;
552
553 SET_BDA(kbd_flag0, flags0);
554 SET_BDA(kbd_flag1, flags1);
555 SET_BDA(kbd_flag2, flags2);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500556}
557
Kevin O'Connor114592f2009-09-28 21:32:08 -0400558void
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400559process_key(u8 key)
560{
Kevin O'Connor57877482009-12-09 21:00:41 -0500561 if (!CONFIG_KEYBOARD)
562 return;
563
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400564 if (CONFIG_KBD_CALL_INT15_4F) {
565 // allow for keyboard intercept
Kevin O'Connorecdc6552012-05-28 14:25:15 -0400566 struct bregs br;
567 memset(&br, 0, sizeof(br));
568 br.eax = (0x4f << 8) | key;
569 br.flags = F_IF|F_CF;
570 call16_int(0x15, &br);
571 if (!(br.flags & F_CF))
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400572 return;
Kevin O'Connorecdc6552012-05-28 14:25:15 -0400573 key = br.eax;
Kevin O'Connoree2efa72009-09-20 15:33:08 -0400574 }
575 __process_key(key);
576}