1 | /*-------------------------------------------------------------------------+ |
---|
2 | | inch.c v1.1 - PC386 BSP - 1997/08/07 |
---|
3 | +--------------------------------------------------------------------------+ |
---|
4 | | (C) Copyright 1997 - |
---|
5 | | - NavIST Group - Real-Time Distributed Systems and Industrial Automation |
---|
6 | | |
---|
7 | | http://pandora.ist.utl.pt |
---|
8 | | |
---|
9 | | Instituto Superior Tecnico * Lisboa * PORTUGAL |
---|
10 | +--------------------------------------------------------------------------+ |
---|
11 | | Disclaimer: |
---|
12 | | |
---|
13 | | This file is provided "AS IS" without warranty of any kind, either |
---|
14 | | expressed or implied. |
---|
15 | +--------------------------------------------------------------------------+ |
---|
16 | | This code is based on: |
---|
17 | | inch.c,v 1.3 1995/12/19 20:07:25 joel Exp - go32 BSP |
---|
18 | | With the following copyright notice: |
---|
19 | | With the following copyright notice: |
---|
20 | | ************************************************************************** |
---|
21 | | * COPYRIGHT (c) 1989-1999. |
---|
22 | | * On-Line Applications Research Corporation (OAR). |
---|
23 | | * |
---|
24 | | * The license and distribution terms for this file may be |
---|
25 | | * found in found in the file LICENSE in this distribution or at |
---|
26 | | * http://www.OARcorp.com/rtems/license.html. |
---|
27 | | ************************************************************************** |
---|
28 | | |
---|
29 | | $Id$ |
---|
30 | +--------------------------------------------------------------------------*/ |
---|
31 | |
---|
32 | #include <bsp.h> |
---|
33 | #include <irq.h> |
---|
34 | |
---|
35 | /*-------------------------------------------------------------------------+ |
---|
36 | | Constants |
---|
37 | +--------------------------------------------------------------------------*/ |
---|
38 | #define KBD_CTL 0x61 /* -------------------------------- */ |
---|
39 | #define KBD_DATA 0x60 /* Ports for PC keyboard controller */ |
---|
40 | #define KBD_STATUS 0x64 /* -------------------------------- */ |
---|
41 | |
---|
42 | #define KBD_BUF_SIZE 256 |
---|
43 | |
---|
44 | /*-------------------------------------------------------------------------+ |
---|
45 | | Global Variables |
---|
46 | +--------------------------------------------------------------------------*/ |
---|
47 | static char key_map[] = |
---|
48 | { |
---|
49 | 0,033,'1','2','3','4','5','6','7','8','9','0','-','=','\b','\t', |
---|
50 | 'q','w','e','r','t','y','u','i','o','p','[',']',015,0x80, |
---|
51 | 'a','s','d','f','g','h','j','k','l',';',047,0140,0x80, |
---|
52 | 0134,'z','x','c','v','b','n','m',',','.','/',0x80, |
---|
53 | '*',0x80,' ',0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, |
---|
54 | 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, |
---|
55 | 0x80,0x80,0x80,'0',0177 |
---|
56 | }; /* Keyboard scancode -> character map with no modifiers. */ |
---|
57 | |
---|
58 | static char shift_map[] = |
---|
59 | { |
---|
60 | 0,033,'!','@','#','$','%','^','&','*','(',')','_','+','\b','\t', |
---|
61 | 'Q','W','E','R','T','Y','U','I','O','P','{','}',015,0x80, |
---|
62 | 'A','S','D','F','G','H','J','K','L',':',042,'~',0x80, |
---|
63 | '|','Z','X','C','V','B','N','M','<','>','?',0x80, |
---|
64 | '*',0x80,' ',0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80, |
---|
65 | 0x80,0x80,0x80,0x80,'7','8','9',0x80,'4','5','6',0x80, |
---|
66 | '1','2','3','0',177 |
---|
67 | }; /* Keyboard scancode -> character map with SHIFT key modifier. */ |
---|
68 | |
---|
69 | static char kbd_buffer[KBD_BUF_SIZE]; |
---|
70 | static rtems_unsigned16 kbd_first = 0; |
---|
71 | static rtems_unsigned16 kbd_last = 0; |
---|
72 | static rtems_unsigned16 kbd_end = KBD_BUF_SIZE - 1; |
---|
73 | |
---|
74 | /*-------------------------------------------------------------------------+ |
---|
75 | | Function: rtemsReboot |
---|
76 | | Description: Reboot the PC. |
---|
77 | | Global Variables: None. |
---|
78 | | Arguments: None. |
---|
79 | | Returns: Nothing. |
---|
80 | +--------------------------------------------------------------------------*/ |
---|
81 | void rtemsReboot(void) |
---|
82 | { |
---|
83 | /* shutdown and reboot */ |
---|
84 | outport_byte(0x64, 0xFE); /* use keyboard controler to do the job... */ |
---|
85 | } /* rtemsReboot */ |
---|
86 | |
---|
87 | /*-------------------------------------------------------------------------+ |
---|
88 | | Function: _IBMPC_scankey |
---|
89 | | Description: This function can be called during a poll for input, or by |
---|
90 | | an ISR. Basically any time you want to process a keypress. |
---|
91 | | Global Variables: key_map, shift_map. |
---|
92 | | Arguments: outChar - character read in case of a valid reading, |
---|
93 | | otherwise unchanged. |
---|
94 | | Returns: TRUE in case a valid character has been read, |
---|
95 | | FALSE otherwise. |
---|
96 | +--------------------------------------------------------------------------*/ |
---|
97 | rtems_boolean |
---|
98 | _IBMPC_scankey(char *outChar) |
---|
99 | { |
---|
100 | unsigned char inChar; |
---|
101 | static int alt_pressed = 0; |
---|
102 | static int ctrl_pressed = 0; |
---|
103 | static int shift_pressed = 0; |
---|
104 | static int caps_pressed = 0; |
---|
105 | static int extended = 0; |
---|
106 | |
---|
107 | *outChar = NULL; /* default value if we return FALSE */ |
---|
108 | |
---|
109 | /* Read keyboard controller, toggle enable */ |
---|
110 | inport_byte(KBD_CTL, inChar); |
---|
111 | outport_byte(KBD_CTL, inChar & ~0x80); |
---|
112 | outport_byte(KBD_CTL, inChar | 0x80); |
---|
113 | outport_byte(KBD_CTL, inChar & ~0x80); |
---|
114 | |
---|
115 | /* See if it has data */ |
---|
116 | inport_byte(KBD_STATUS, inChar); |
---|
117 | if ((inChar & 0x01) == 0) |
---|
118 | return FALSE; |
---|
119 | |
---|
120 | /* Read the data. Handle nonsense with shift, control, etc. */ |
---|
121 | inport_byte(KBD_DATA, inChar); |
---|
122 | |
---|
123 | if (extended) |
---|
124 | extended--; |
---|
125 | |
---|
126 | switch (inChar) |
---|
127 | { |
---|
128 | case 0xe0: |
---|
129 | extended = 2; |
---|
130 | return FALSE; |
---|
131 | break; |
---|
132 | |
---|
133 | case 0x38: |
---|
134 | alt_pressed = 1; |
---|
135 | return FALSE; |
---|
136 | break; |
---|
137 | case 0xb8: |
---|
138 | alt_pressed = 0; |
---|
139 | return FALSE; |
---|
140 | break; |
---|
141 | |
---|
142 | case 0x1d: |
---|
143 | ctrl_pressed = 1; |
---|
144 | return FALSE; |
---|
145 | break; |
---|
146 | case 0x9d: |
---|
147 | ctrl_pressed = 0; |
---|
148 | return FALSE; |
---|
149 | break; |
---|
150 | |
---|
151 | case 0x2a: |
---|
152 | if (extended) |
---|
153 | return FALSE; |
---|
154 | case 0x36: |
---|
155 | shift_pressed = 1; |
---|
156 | return FALSE; |
---|
157 | break; |
---|
158 | case 0xaa: |
---|
159 | if (extended) |
---|
160 | return FALSE; |
---|
161 | case 0xb6: |
---|
162 | shift_pressed = 0; |
---|
163 | return FALSE; |
---|
164 | break; |
---|
165 | |
---|
166 | case 0x3a: |
---|
167 | caps_pressed = 1; |
---|
168 | return FALSE; |
---|
169 | break; |
---|
170 | case 0xba: |
---|
171 | caps_pressed = 0; |
---|
172 | return FALSE; |
---|
173 | break; |
---|
174 | |
---|
175 | case 0x53: |
---|
176 | if (ctrl_pressed && alt_pressed) |
---|
177 | rtemsReboot(); /* ctrl+alt+del -> reboot */ |
---|
178 | break; |
---|
179 | |
---|
180 | /* |
---|
181 | * Ignore unrecognized keys--usually arrow and such |
---|
182 | */ |
---|
183 | default: |
---|
184 | if ((inChar & 0x80) || (inChar > 0x39)) |
---|
185 | /* High-bit on means key is being released, not pressed */ |
---|
186 | return FALSE; |
---|
187 | break; |
---|
188 | } /* switch */ |
---|
189 | |
---|
190 | /* Strip high bit, look up in our map */ |
---|
191 | inChar &= 0x7f; |
---|
192 | if (ctrl_pressed) |
---|
193 | { |
---|
194 | *outChar = key_map[inChar]; |
---|
195 | *outChar &= 037; |
---|
196 | } |
---|
197 | else |
---|
198 | { |
---|
199 | *outChar = shift_pressed ? shift_map[inChar] : key_map[inChar]; |
---|
200 | if (caps_pressed) |
---|
201 | { |
---|
202 | if (*outChar >= 'A' && *outChar <= 'Z') |
---|
203 | *outChar += 'a' - 'A'; |
---|
204 | else if (*outChar >= 'a' && *outChar <= 'z') |
---|
205 | *outChar -= 'a' - 'A'; |
---|
206 | } |
---|
207 | } |
---|
208 | |
---|
209 | return TRUE; |
---|
210 | } /* _IBMPC_scankey */ |
---|
211 | |
---|
212 | /*-------------------------------------------------------------------------+ |
---|
213 | | Function: _IBMPC_keyboard_isr |
---|
214 | | Description: Interrupt Service Routine for keyboard (0x01) IRQ. |
---|
215 | | Global Variables: kbd_buffer, kbd_first, kbd_last. |
---|
216 | | Arguments: vector - standard RTEMS argument - see documentation. |
---|
217 | | Returns: standard return value - see documentation. |
---|
218 | +--------------------------------------------------------------------------*/ |
---|
219 | void _IBMPC_keyboard_isr() |
---|
220 | { |
---|
221 | if (_IBMPC_scankey(&kbd_buffer[kbd_last])) |
---|
222 | { |
---|
223 | /* Got one; save it if there is enough room in buffer. */ |
---|
224 | unsigned int next = (kbd_last == kbd_end) ? 0 : kbd_last + 1; |
---|
225 | |
---|
226 | if (next != kbd_first) |
---|
227 | { |
---|
228 | kbd_last = next; |
---|
229 | } |
---|
230 | } |
---|
231 | } /* _IBMPC_keyboard_isr */ |
---|
232 | |
---|
233 | |
---|
234 | /*-------------------------------------------------------------------------+ |
---|
235 | | Function: _IBMPC_chrdy |
---|
236 | | Description: Check keyboard ISR buffer and return character if not empty. |
---|
237 | | Global Variables: kbd_buffer, kbd_first, kbd_last. |
---|
238 | | Arguments: c - character read if keyboard buffer not empty, otherwise |
---|
239 | | unchanged. |
---|
240 | | Returns: TRUE if keyboard buffer not empty, FALSE otherwise. |
---|
241 | +--------------------------------------------------------------------------*/ |
---|
242 | rtems_boolean |
---|
243 | _IBMPC_chrdy(char *c) |
---|
244 | { |
---|
245 | /* FIX ME!!! It doesn't work without something like the following line. |
---|
246 | Find out why! */ |
---|
247 | printk(""); |
---|
248 | |
---|
249 | /* Check buffer our ISR builds */ |
---|
250 | if (kbd_first != kbd_last) |
---|
251 | { |
---|
252 | *c = kbd_buffer[kbd_first]; |
---|
253 | |
---|
254 | kbd_first = (kbd_first + 1) % KBD_BUF_SIZE; |
---|
255 | return TRUE; |
---|
256 | } |
---|
257 | else |
---|
258 | return FALSE; |
---|
259 | } /* _IBMPC_chrdy */ |
---|
260 | |
---|
261 | |
---|
262 | /*-------------------------------------------------------------------------+ |
---|
263 | | Function: _IBMPC_inch |
---|
264 | | Description: Poll keyboard until a character is ready and return it. |
---|
265 | | Global Variables: None. |
---|
266 | | Arguments: None. |
---|
267 | | Returns: character read from keyboard. |
---|
268 | +--------------------------------------------------------------------------*/ |
---|
269 | char |
---|
270 | _IBMPC_inch(void) |
---|
271 | { |
---|
272 | char c; |
---|
273 | while (!_IBMPC_chrdy(&c)) |
---|
274 | continue; |
---|
275 | |
---|
276 | return c; |
---|
277 | } /* _IBMPC_inch */ |
---|
278 | |
---|
279 | |
---|
280 | /* |
---|
281 | * Routine that can be used before interrupt management is initialized. |
---|
282 | */ |
---|
283 | |
---|
284 | char |
---|
285 | BSP_wait_polled_input(void) |
---|
286 | { |
---|
287 | char c; |
---|
288 | while (!_IBMPC_scankey(&c)) |
---|
289 | continue; |
---|
290 | |
---|
291 | return c; |
---|
292 | } |
---|
293 | |
---|
294 | /*-------------------------------------------------------------------------+ |
---|
295 | | Function: _IBMPC_inch_sleep |
---|
296 | | Description: If charcter is ready return it, otherwise sleep until |
---|
297 | | it is ready |
---|
298 | | Global Variables: None. |
---|
299 | | Arguments: None. |
---|
300 | | Returns: character read from keyboard. |
---|
301 | +--------------------------------------------------------------------------*/ |
---|
302 | char |
---|
303 | _IBMPC_inch_sleep(void) |
---|
304 | { |
---|
305 | char c; |
---|
306 | rtems_interval ticks_per_second; |
---|
307 | |
---|
308 | ticks_per_second = 0; |
---|
309 | |
---|
310 | for(;;) |
---|
311 | { |
---|
312 | if(_IBMPC_chrdy(&c)) |
---|
313 | { |
---|
314 | return c; |
---|
315 | } |
---|
316 | |
---|
317 | if(ticks_per_second == 0) |
---|
318 | { |
---|
319 | rtems_clock_get(RTEMS_CLOCK_GET_TICKS_PER_SECOND, |
---|
320 | &ticks_per_second); |
---|
321 | } |
---|
322 | rtems_task_wake_after((ticks_per_second+24)/25); |
---|
323 | } |
---|
324 | |
---|
325 | return c; |
---|
326 | } /* _IBMPC_inch */ |
---|
327 | |
---|
328 | |
---|
329 | |
---|
330 | |
---|
331 | |
---|
332 | |
---|