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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genarch |
29 | /** @addtogroup genarch |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <genarch/i8042/i8042.h> |
35 | #include <genarch/i8042/i8042.h> |
36 | #include <arch/drivers/i8042.h> |
36 | #include <arch/drivers/i8042.h> |
37 | #include <arch/interrupt.h> |
37 | #include <arch/interrupt.h> |
38 | #include <cpu.h> |
38 | #include <cpu.h> |
39 | #include <arch/asm.h> |
39 | #include <arch/asm.h> |
40 | #include <arch.h> |
40 | #include <arch.h> |
41 | #include <synch/spinlock.h> |
41 | #include <synch/spinlock.h> |
42 | #include <typedefs.h> |
42 | #include <typedefs.h> |
43 | #include <console/chardev.h> |
43 | #include <console/chardev.h> |
44 | #include <console/console.h> |
44 | #include <console/console.h> |
45 | #include <macros.h> |
45 | #include <macros.h> |
46 | #include <interrupt.h> |
46 | #include <interrupt.h> |
47 | 47 | ||
48 | /** |
48 | /** |
49 | * i8042 processor driver. |
49 | * i8042 processor driver. |
50 | * It takes care of low-level keyboard functions. |
50 | * It takes care of low-level keyboard functions. |
51 | */ |
51 | */ |
52 | 52 | ||
53 | /** Keyboard commands. */ |
53 | /** Keyboard commands. */ |
54 | #define KBD_ENABLE 0xf4 |
54 | #define KBD_ENABLE 0xf4 |
55 | #define KBD_DISABLE 0xf5 |
55 | #define KBD_DISABLE 0xf5 |
56 | #define KBD_ACK 0xfa |
56 | #define KBD_ACK 0xfa |
57 | 57 | ||
58 | /* |
58 | /* |
59 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
59 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
60 | * placed in 8042 command register. Format: |
60 | * placed in 8042 command register. Format: |
61 | * |
61 | * |
62 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
62 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
63 | * | | | | | | | `---- 1=enable output register full interrupt |
63 | * | | | | | | | `---- 1=enable output register full interrupt |
64 | * | | | | | | `----- should be 0 |
64 | * | | | | | | `----- should be 0 |
65 | * | | | | | `------ 1=set status register system, 0=clear |
65 | * | | | | | `------ 1=set status register system, 0=clear |
66 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
66 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
67 | * | | | `-------- disable keyboard I/O by driving clock line low |
67 | * | | | `-------- disable keyboard I/O by driving clock line low |
68 | * | | `--------- disable auxiliary device, drives clock line low |
68 | * | | `--------- disable auxiliary device, drives clock line low |
69 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
69 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
70 | * `----------- reserved, should be 0 |
70 | * `----------- reserved, should be 0 |
71 | */ |
71 | */ |
72 | 72 | ||
73 | #define i8042_SET_COMMAND 0x60 |
73 | #define i8042_SET_COMMAND 0x60 |
74 | #define i8042_COMMAND 0x49 |
74 | #define i8042_COMMAND 0x49 |
75 | 75 | ||
76 | #define i8042_BUFFER_FULL_MASK 0x01 |
76 | #define i8042_BUFFER_FULL_MASK 0x01 |
77 | #define i8042_WAIT_MASK 0x02 |
77 | #define i8042_WAIT_MASK 0x02 |
78 | 78 | ||
79 | #define SPECIAL '?' |
79 | #define SPECIAL '?' |
80 | #define KEY_RELEASE 0x80 |
80 | #define KEY_RELEASE 0x80 |
81 | 81 | ||
82 | /** |
82 | /** |
83 | * These codes read from i8042 data register are silently ignored. |
83 | * These codes read from i8042 data register are silently ignored. |
84 | */ |
84 | */ |
85 | #define IGNORE_CODE 0x7f |
85 | #define IGNORE_CODE 0x7f |
86 | 86 | ||
87 | static void key_released(__u8 sc); |
87 | static void key_released(__u8 sc); |
88 | static void key_pressed(__u8 sc); |
88 | static void key_pressed(__u8 sc); |
89 | static char key_read(chardev_t *d); |
89 | static char key_read(chardev_t *d); |
90 | 90 | ||
91 | #define PRESSED_SHIFT (1<<0) |
91 | #define PRESSED_SHIFT (1<<0) |
92 | #define PRESSED_CAPSLOCK (1<<1) |
92 | #define PRESSED_CAPSLOCK (1<<1) |
93 | #define LOCKED_CAPSLOCK (1<<0) |
93 | #define LOCKED_CAPSLOCK (1<<0) |
94 | 94 | ||
95 | #define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */ |
95 | #define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */ |
96 | 96 | ||
97 | static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE]; |
97 | static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE]; |
98 | 98 | ||
99 | SPINLOCK_INITIALIZE(keylock); /**< keylock protects keyflags and lockflags. */ |
99 | SPINLOCK_INITIALIZE(keylock); /**< keylock protects keyflags and lockflags. */ |
100 | static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
100 | static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
101 | static volatile int lockflags; /**< Tracking of multiple keys lockings. */ |
101 | static volatile int lockflags; /**< Tracking of multiple keys lockings. */ |
102 | 102 | ||
103 | static void i8042_suspend(chardev_t *); |
103 | static void i8042_suspend(chardev_t *); |
104 | static void i8042_resume(chardev_t *); |
104 | static void i8042_resume(chardev_t *); |
105 | 105 | ||
106 | static chardev_t kbrd; |
106 | static chardev_t kbrd; |
107 | static chardev_operations_t ops = { |
107 | static chardev_operations_t ops = { |
108 | .suspend = i8042_suspend, |
108 | .suspend = i8042_suspend, |
109 | .resume = i8042_resume, |
109 | .resume = i8042_resume, |
110 | .read = key_read |
110 | .read = key_read |
111 | }; |
111 | }; |
112 | 112 | ||
113 | /** Primary meaning of scancodes. */ |
113 | /** Primary meaning of scancodes. */ |
114 | static char sc_primary_map[] = { |
114 | static char sc_primary_map[] = { |
115 | SPECIAL, /* 0x00 */ |
115 | SPECIAL, /* 0x00 */ |
116 | SPECIAL, /* 0x01 - Esc */ |
116 | SPECIAL, /* 0x01 - Esc */ |
117 | '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', |
117 | '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', |
118 | '\b', /* 0x0e - Backspace */ |
118 | '\b', /* 0x0e - Backspace */ |
119 | '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', |
119 | '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', |
120 | SPECIAL, /* 0x1d - LCtrl */ |
120 | SPECIAL, /* 0x1d - LCtrl */ |
121 | 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', |
121 | 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', |
122 | '`', |
122 | '`', |
123 | SPECIAL, /* 0x2a - LShift */ |
123 | SPECIAL, /* 0x2a - LShift */ |
124 | '\\', |
124 | '\\', |
125 | 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', |
125 | 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', |
126 | SPECIAL, /* 0x36 - RShift */ |
126 | SPECIAL, /* 0x36 - RShift */ |
127 | '*', |
127 | '*', |
128 | SPECIAL, /* 0x38 - LAlt */ |
128 | SPECIAL, /* 0x38 - LAlt */ |
129 | ' ', |
129 | ' ', |
130 | SPECIAL, /* 0x3a - CapsLock */ |
130 | SPECIAL, /* 0x3a - CapsLock */ |
131 | SPECIAL, /* 0x3b - F1 */ |
131 | SPECIAL, /* 0x3b - F1 */ |
132 | SPECIAL, /* 0x3c - F2 */ |
132 | SPECIAL, /* 0x3c - F2 */ |
133 | SPECIAL, /* 0x3d - F3 */ |
133 | SPECIAL, /* 0x3d - F3 */ |
134 | SPECIAL, /* 0x3e - F4 */ |
134 | SPECIAL, /* 0x3e - F4 */ |
135 | SPECIAL, /* 0x3f - F5 */ |
135 | SPECIAL, /* 0x3f - F5 */ |
136 | SPECIAL, /* 0x40 - F6 */ |
136 | SPECIAL, /* 0x40 - F6 */ |
137 | SPECIAL, /* 0x41 - F7 */ |
137 | SPECIAL, /* 0x41 - F7 */ |
138 | SPECIAL, /* 0x42 - F8 */ |
138 | SPECIAL, /* 0x42 - F8 */ |
139 | SPECIAL, /* 0x43 - F9 */ |
139 | SPECIAL, /* 0x43 - F9 */ |
140 | SPECIAL, /* 0x44 - F10 */ |
140 | SPECIAL, /* 0x44 - F10 */ |
141 | SPECIAL, /* 0x45 - NumLock */ |
141 | SPECIAL, /* 0x45 - NumLock */ |
142 | SPECIAL, /* 0x46 - ScrollLock */ |
142 | SPECIAL, /* 0x46 - ScrollLock */ |
143 | '7', '8', '9', '-', |
143 | '7', '8', '9', '-', |
144 | '4', '5', '6', '+', |
144 | '4', '5', '6', '+', |
145 | '1', '2', '3', |
145 | '1', '2', '3', |
146 | '0', '.', |
146 | '0', '.', |
147 | SPECIAL, /* 0x54 - Alt-SysRq */ |
147 | SPECIAL, /* 0x54 - Alt-SysRq */ |
148 | SPECIAL, /* 0x55 - F11/F12/PF1/FN */ |
148 | SPECIAL, /* 0x55 - F11/F12/PF1/FN */ |
149 | SPECIAL, /* 0x56 - unlabelled key next to LAlt */ |
149 | SPECIAL, /* 0x56 - unlabelled key next to LAlt */ |
150 | SPECIAL, /* 0x57 - F11 */ |
150 | SPECIAL, /* 0x57 - F11 */ |
151 | SPECIAL, /* 0x58 - F12 */ |
151 | SPECIAL, /* 0x58 - F12 */ |
152 | SPECIAL, /* 0x59 */ |
152 | SPECIAL, /* 0x59 */ |
153 | SPECIAL, /* 0x5a */ |
153 | SPECIAL, /* 0x5a */ |
154 | SPECIAL, /* 0x5b */ |
154 | SPECIAL, /* 0x5b */ |
155 | SPECIAL, /* 0x5c */ |
155 | SPECIAL, /* 0x5c */ |
156 | SPECIAL, /* 0x5d */ |
156 | SPECIAL, /* 0x5d */ |
157 | SPECIAL, /* 0x5e */ |
157 | SPECIAL, /* 0x5e */ |
158 | SPECIAL, /* 0x5f */ |
158 | SPECIAL, /* 0x5f */ |
159 | SPECIAL, /* 0x60 */ |
159 | SPECIAL, /* 0x60 */ |
160 | SPECIAL, /* 0x61 */ |
160 | SPECIAL, /* 0x61 */ |
161 | SPECIAL, /* 0x62 */ |
161 | SPECIAL, /* 0x62 */ |
162 | SPECIAL, /* 0x63 */ |
162 | SPECIAL, /* 0x63 */ |
163 | SPECIAL, /* 0x64 */ |
163 | SPECIAL, /* 0x64 */ |
164 | SPECIAL, /* 0x65 */ |
164 | SPECIAL, /* 0x65 */ |
165 | SPECIAL, /* 0x66 */ |
165 | SPECIAL, /* 0x66 */ |
166 | SPECIAL, /* 0x67 */ |
166 | SPECIAL, /* 0x67 */ |
167 | SPECIAL, /* 0x68 */ |
167 | SPECIAL, /* 0x68 */ |
168 | SPECIAL, /* 0x69 */ |
168 | SPECIAL, /* 0x69 */ |
169 | SPECIAL, /* 0x6a */ |
169 | SPECIAL, /* 0x6a */ |
170 | SPECIAL, /* 0x6b */ |
170 | SPECIAL, /* 0x6b */ |
171 | SPECIAL, /* 0x6c */ |
171 | SPECIAL, /* 0x6c */ |
172 | SPECIAL, /* 0x6d */ |
172 | SPECIAL, /* 0x6d */ |
173 | SPECIAL, /* 0x6e */ |
173 | SPECIAL, /* 0x6e */ |
174 | SPECIAL, /* 0x6f */ |
174 | SPECIAL, /* 0x6f */ |
175 | SPECIAL, /* 0x70 */ |
175 | SPECIAL, /* 0x70 */ |
176 | SPECIAL, /* 0x71 */ |
176 | SPECIAL, /* 0x71 */ |
177 | SPECIAL, /* 0x72 */ |
177 | SPECIAL, /* 0x72 */ |
178 | SPECIAL, /* 0x73 */ |
178 | SPECIAL, /* 0x73 */ |
179 | SPECIAL, /* 0x74 */ |
179 | SPECIAL, /* 0x74 */ |
180 | SPECIAL, /* 0x75 */ |
180 | SPECIAL, /* 0x75 */ |
181 | SPECIAL, /* 0x76 */ |
181 | SPECIAL, /* 0x76 */ |
182 | SPECIAL, /* 0x77 */ |
182 | SPECIAL, /* 0x77 */ |
183 | SPECIAL, /* 0x78 */ |
183 | SPECIAL, /* 0x78 */ |
184 | SPECIAL, /* 0x79 */ |
184 | SPECIAL, /* 0x79 */ |
185 | SPECIAL, /* 0x7a */ |
185 | SPECIAL, /* 0x7a */ |
186 | SPECIAL, /* 0x7b */ |
186 | SPECIAL, /* 0x7b */ |
187 | SPECIAL, /* 0x7c */ |
187 | SPECIAL, /* 0x7c */ |
188 | SPECIAL, /* 0x7d */ |
188 | SPECIAL, /* 0x7d */ |
189 | SPECIAL, /* 0x7e */ |
189 | SPECIAL, /* 0x7e */ |
190 | SPECIAL, /* 0x7f */ |
190 | SPECIAL, /* 0x7f */ |
191 | }; |
191 | }; |
192 | 192 | ||
193 | /** Secondary meaning of scancodes. */ |
193 | /** Secondary meaning of scancodes. */ |
194 | static char sc_secondary_map[] = { |
194 | static char sc_secondary_map[] = { |
195 | SPECIAL, /* 0x00 */ |
195 | SPECIAL, /* 0x00 */ |
196 | SPECIAL, /* 0x01 - Esc */ |
196 | SPECIAL, /* 0x01 - Esc */ |
197 | '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', |
197 | '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', |
198 | SPECIAL, /* 0x0e - Backspace */ |
198 | SPECIAL, /* 0x0e - Backspace */ |
199 | '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', |
199 | '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', |
200 | SPECIAL, /* 0x1d - LCtrl */ |
200 | SPECIAL, /* 0x1d - LCtrl */ |
201 | 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', |
201 | 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', |
202 | '~', |
202 | '~', |
203 | SPECIAL, /* 0x2a - LShift */ |
203 | SPECIAL, /* 0x2a - LShift */ |
204 | '|', |
204 | '|', |
205 | 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?', |
205 | 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?', |
206 | SPECIAL, /* 0x36 - RShift */ |
206 | SPECIAL, /* 0x36 - RShift */ |
207 | '*', |
207 | '*', |
208 | SPECIAL, /* 0x38 - LAlt */ |
208 | SPECIAL, /* 0x38 - LAlt */ |
209 | ' ', |
209 | ' ', |
210 | SPECIAL, /* 0x3a - CapsLock */ |
210 | SPECIAL, /* 0x3a - CapsLock */ |
211 | SPECIAL, /* 0x3b - F1 */ |
211 | SPECIAL, /* 0x3b - F1 */ |
212 | SPECIAL, /* 0x3c - F2 */ |
212 | SPECIAL, /* 0x3c - F2 */ |
213 | SPECIAL, /* 0x3d - F3 */ |
213 | SPECIAL, /* 0x3d - F3 */ |
214 | SPECIAL, /* 0x3e - F4 */ |
214 | SPECIAL, /* 0x3e - F4 */ |
215 | SPECIAL, /* 0x3f - F5 */ |
215 | SPECIAL, /* 0x3f - F5 */ |
216 | SPECIAL, /* 0x40 - F6 */ |
216 | SPECIAL, /* 0x40 - F6 */ |
217 | SPECIAL, /* 0x41 - F7 */ |
217 | SPECIAL, /* 0x41 - F7 */ |
218 | SPECIAL, /* 0x42 - F8 */ |
218 | SPECIAL, /* 0x42 - F8 */ |
219 | SPECIAL, /* 0x43 - F9 */ |
219 | SPECIAL, /* 0x43 - F9 */ |
220 | SPECIAL, /* 0x44 - F10 */ |
220 | SPECIAL, /* 0x44 - F10 */ |
221 | SPECIAL, /* 0x45 - NumLock */ |
221 | SPECIAL, /* 0x45 - NumLock */ |
222 | SPECIAL, /* 0x46 - ScrollLock */ |
222 | SPECIAL, /* 0x46 - ScrollLock */ |
223 | '7', '8', '9', '-', |
223 | '7', '8', '9', '-', |
224 | '4', '5', '6', '+', |
224 | '4', '5', '6', '+', |
225 | '1', '2', '3', |
225 | '1', '2', '3', |
226 | '0', '.', |
226 | '0', '.', |
227 | SPECIAL, /* 0x54 - Alt-SysRq */ |
227 | SPECIAL, /* 0x54 - Alt-SysRq */ |
228 | SPECIAL, /* 0x55 - F11/F12/PF1/FN */ |
228 | SPECIAL, /* 0x55 - F11/F12/PF1/FN */ |
229 | SPECIAL, /* 0x56 - unlabelled key next to LAlt */ |
229 | SPECIAL, /* 0x56 - unlabelled key next to LAlt */ |
230 | SPECIAL, /* 0x57 - F11 */ |
230 | SPECIAL, /* 0x57 - F11 */ |
231 | SPECIAL, /* 0x58 - F12 */ |
231 | SPECIAL, /* 0x58 - F12 */ |
232 | SPECIAL, /* 0x59 */ |
232 | SPECIAL, /* 0x59 */ |
233 | SPECIAL, /* 0x5a */ |
233 | SPECIAL, /* 0x5a */ |
234 | SPECIAL, /* 0x5b */ |
234 | SPECIAL, /* 0x5b */ |
235 | SPECIAL, /* 0x5c */ |
235 | SPECIAL, /* 0x5c */ |
236 | SPECIAL, /* 0x5d */ |
236 | SPECIAL, /* 0x5d */ |
237 | SPECIAL, /* 0x5e */ |
237 | SPECIAL, /* 0x5e */ |
238 | SPECIAL, /* 0x5f */ |
238 | SPECIAL, /* 0x5f */ |
239 | SPECIAL, /* 0x60 */ |
239 | SPECIAL, /* 0x60 */ |
240 | SPECIAL, /* 0x61 */ |
240 | SPECIAL, /* 0x61 */ |
241 | SPECIAL, /* 0x62 */ |
241 | SPECIAL, /* 0x62 */ |
242 | SPECIAL, /* 0x63 */ |
242 | SPECIAL, /* 0x63 */ |
243 | SPECIAL, /* 0x64 */ |
243 | SPECIAL, /* 0x64 */ |
244 | SPECIAL, /* 0x65 */ |
244 | SPECIAL, /* 0x65 */ |
245 | SPECIAL, /* 0x66 */ |
245 | SPECIAL, /* 0x66 */ |
246 | SPECIAL, /* 0x67 */ |
246 | SPECIAL, /* 0x67 */ |
247 | SPECIAL, /* 0x68 */ |
247 | SPECIAL, /* 0x68 */ |
248 | SPECIAL, /* 0x69 */ |
248 | SPECIAL, /* 0x69 */ |
249 | SPECIAL, /* 0x6a */ |
249 | SPECIAL, /* 0x6a */ |
250 | SPECIAL, /* 0x6b */ |
250 | SPECIAL, /* 0x6b */ |
251 | SPECIAL, /* 0x6c */ |
251 | SPECIAL, /* 0x6c */ |
252 | SPECIAL, /* 0x6d */ |
252 | SPECIAL, /* 0x6d */ |
253 | SPECIAL, /* 0x6e */ |
253 | SPECIAL, /* 0x6e */ |
254 | SPECIAL, /* 0x6f */ |
254 | SPECIAL, /* 0x6f */ |
255 | SPECIAL, /* 0x70 */ |
255 | SPECIAL, /* 0x70 */ |
256 | SPECIAL, /* 0x71 */ |
256 | SPECIAL, /* 0x71 */ |
257 | SPECIAL, /* 0x72 */ |
257 | SPECIAL, /* 0x72 */ |
258 | SPECIAL, /* 0x73 */ |
258 | SPECIAL, /* 0x73 */ |
259 | SPECIAL, /* 0x74 */ |
259 | SPECIAL, /* 0x74 */ |
260 | SPECIAL, /* 0x75 */ |
260 | SPECIAL, /* 0x75 */ |
261 | SPECIAL, /* 0x76 */ |
261 | SPECIAL, /* 0x76 */ |
262 | SPECIAL, /* 0x77 */ |
262 | SPECIAL, /* 0x77 */ |
263 | SPECIAL, /* 0x78 */ |
263 | SPECIAL, /* 0x78 */ |
264 | SPECIAL, /* 0x79 */ |
264 | SPECIAL, /* 0x79 */ |
265 | SPECIAL, /* 0x7a */ |
265 | SPECIAL, /* 0x7a */ |
266 | SPECIAL, /* 0x7b */ |
266 | SPECIAL, /* 0x7b */ |
267 | SPECIAL, /* 0x7c */ |
267 | SPECIAL, /* 0x7c */ |
268 | SPECIAL, /* 0x7d */ |
268 | SPECIAL, /* 0x7d */ |
269 | SPECIAL, /* 0x7e */ |
269 | SPECIAL, /* 0x7e */ |
270 | SPECIAL, /* 0x7f */ |
270 | SPECIAL, /* 0x7f */ |
271 | }; |
271 | }; |
272 | 272 | ||
273 | static void i8042_interrupt(int n, istate_t *istate); |
273 | static void i8042_interrupt(int n, istate_t *istate); |
274 | static void i8042_wait(void); |
274 | static void i8042_wait(void); |
275 | 275 | ||
276 | static iroutine oldvector; |
276 | static iroutine oldvector; |
277 | /** Initialize keyboard and service interrupts using kernel routine */ |
277 | /** Initialize keyboard and service interrupts using kernel routine */ |
278 | void i8042_grab(void) |
278 | void i8042_grab(void) |
279 | { |
279 | { |
280 | oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt); |
280 | oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt); |
281 | i8042_wait(); |
281 | i8042_wait(); |
282 | i8042_command_write(i8042_SET_COMMAND); |
282 | i8042_command_write(i8042_SET_COMMAND); |
283 | i8042_wait(); |
283 | i8042_wait(); |
284 | i8042_data_write(i8042_COMMAND); |
284 | i8042_data_write(i8042_COMMAND); |
285 | i8042_wait(); |
285 | i8042_wait(); |
286 | } |
286 | } |
287 | /** Resume the former interrupt vector */ |
287 | /** Resume the former interrupt vector */ |
288 | void i8042_release(void) |
288 | void i8042_release(void) |
289 | { |
289 | { |
290 | if (oldvector) |
290 | if (oldvector) |
291 | exc_register(VECTOR_KBD, "user_interrupt", oldvector); |
291 | exc_register(VECTOR_KBD, "user_interrupt", oldvector); |
292 | } |
292 | } |
293 | 293 | ||
294 | /** Initialize i8042. */ |
294 | /** Initialize i8042. */ |
295 | void i8042_init(void) |
295 | void i8042_init(void) |
296 | { |
296 | { |
297 | int i; |
297 | int i; |
298 | 298 | ||
299 | i8042_grab(); |
299 | i8042_grab(); |
300 | /* Prevent user from accidentaly releasing calling i8042_resume |
300 | /* Prevent user from accidentaly releasing calling i8042_resume |
301 | * and disabling keyboard |
301 | * and disabling keyboard |
302 | */ |
302 | */ |
303 | oldvector = NULL; |
303 | oldvector = NULL; |
304 | 304 | ||
305 | trap_virtual_enable_irqs(1<<IRQ_KBD); |
305 | trap_virtual_enable_irqs(1<<IRQ_KBD); |
306 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
306 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
307 | stdin = &kbrd; |
307 | stdin = &kbrd; |
308 | 308 | ||
309 | /* |
309 | /* |
310 | * Clear input buffer. |
310 | * Clear input buffer. |
311 | * Number of iterations is limited to prevent infinite looping. |
311 | * Number of iterations is limited to prevent infinite looping. |
312 | */ |
312 | */ |
313 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
313 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
314 | i8042_data_read(); |
314 | i8042_data_read(); |
315 | } |
315 | } |
316 | } |
316 | } |
317 | 317 | ||
318 | /** Process i8042 interrupt. |
318 | /** Process i8042 interrupt. |
319 | * |
319 | * |
320 | * @param n Interrupt vector. |
320 | * @param n Interrupt vector. |
321 | * @param istate Interrupted state. |
321 | * @param istate Interrupted state. |
322 | */ |
322 | */ |
323 | void i8042_interrupt(int n, istate_t *istate) |
323 | void i8042_interrupt(int n, istate_t *istate) |
324 | { |
324 | { |
325 | __u8 x; |
325 | __u8 x; |
326 | 326 | ||
- | 327 | while ((i8042_status_read() & i8042_BUFFER_FULL_MASK)) { |
|
- | 328 | x = i8042_data_read(); |
|
- | 329 | if (x & KEY_RELEASE) |
|
- | 330 | key_released(x ^ KEY_RELEASE); |
|
- | 331 | else |
|
- | 332 | key_pressed(x); |
|
- | 333 | } |
|
327 | trap_virtual_eoi(); |
334 | trap_virtual_eoi(); |
328 | x = i8042_data_read(); |
- | |
329 | if (x & KEY_RELEASE) |
- | |
330 | key_released(x ^ KEY_RELEASE); |
- | |
331 | else |
- | |
332 | key_pressed(x); |
- | |
333 | } |
335 | } |
334 | 336 | ||
335 | /** Wait until the controller reads its data. */ |
337 | /** Wait until the controller reads its data. */ |
336 | void i8042_wait(void) { |
338 | void i8042_wait(void) { |
337 | while (i8042_status_read() & i8042_WAIT_MASK) { |
339 | while (i8042_status_read() & i8042_WAIT_MASK) { |
338 | /* wait */ |
340 | /* wait */ |
339 | } |
341 | } |
340 | } |
342 | } |
341 | 343 | ||
342 | /** Process release of key. |
344 | /** Process release of key. |
343 | * |
345 | * |
344 | * @param sc Scancode of the key being released. |
346 | * @param sc Scancode of the key being released. |
345 | */ |
347 | */ |
346 | void key_released(__u8 sc) |
348 | void key_released(__u8 sc) |
347 | { |
349 | { |
348 | spinlock_lock(&keylock); |
350 | spinlock_lock(&keylock); |
349 | switch (sc) { |
351 | switch (sc) { |
350 | case SC_LSHIFT: |
352 | case SC_LSHIFT: |
351 | case SC_RSHIFT: |
353 | case SC_RSHIFT: |
352 | keyflags &= ~PRESSED_SHIFT; |
354 | keyflags &= ~PRESSED_SHIFT; |
353 | break; |
355 | break; |
354 | case SC_CAPSLOCK: |
356 | case SC_CAPSLOCK: |
355 | keyflags &= ~PRESSED_CAPSLOCK; |
357 | keyflags &= ~PRESSED_CAPSLOCK; |
356 | if (lockflags & LOCKED_CAPSLOCK) |
358 | if (lockflags & LOCKED_CAPSLOCK) |
357 | lockflags &= ~LOCKED_CAPSLOCK; |
359 | lockflags &= ~LOCKED_CAPSLOCK; |
358 | else |
360 | else |
359 | lockflags |= LOCKED_CAPSLOCK; |
361 | lockflags |= LOCKED_CAPSLOCK; |
360 | break; |
362 | break; |
361 | default: |
363 | default: |
362 | break; |
364 | break; |
363 | } |
365 | } |
364 | spinlock_unlock(&keylock); |
366 | spinlock_unlock(&keylock); |
365 | } |
367 | } |
366 | 368 | ||
367 | /** Process keypress. |
369 | /** Process keypress. |
368 | * |
370 | * |
369 | * @param sc Scancode of the key being pressed. |
371 | * @param sc Scancode of the key being pressed. |
370 | */ |
372 | */ |
371 | void key_pressed(__u8 sc) |
373 | void key_pressed(__u8 sc) |
372 | { |
374 | { |
373 | char *map = sc_primary_map; |
375 | char *map = sc_primary_map; |
374 | char ascii = sc_primary_map[sc]; |
376 | char ascii = sc_primary_map[sc]; |
375 | bool shift, capslock; |
377 | bool shift, capslock; |
376 | bool letter = false; |
378 | bool letter = false; |
377 | 379 | ||
378 | spinlock_lock(&keylock); |
380 | spinlock_lock(&keylock); |
379 | switch (sc) { |
381 | switch (sc) { |
380 | case SC_LSHIFT: |
382 | case SC_LSHIFT: |
381 | case SC_RSHIFT: |
383 | case SC_RSHIFT: |
382 | keyflags |= PRESSED_SHIFT; |
384 | keyflags |= PRESSED_SHIFT; |
383 | break; |
385 | break; |
384 | case SC_CAPSLOCK: |
386 | case SC_CAPSLOCK: |
385 | keyflags |= PRESSED_CAPSLOCK; |
387 | keyflags |= PRESSED_CAPSLOCK; |
386 | break; |
388 | break; |
387 | case SC_SPEC_ESCAPE: |
389 | case SC_SPEC_ESCAPE: |
388 | break; |
390 | break; |
389 | case SC_LEFTARR: |
391 | case SC_LEFTARR: |
390 | chardev_push_character(&kbrd, 0x1b); |
392 | chardev_push_character(&kbrd, 0x1b); |
391 | chardev_push_character(&kbrd, 0x5b); |
393 | chardev_push_character(&kbrd, 0x5b); |
392 | chardev_push_character(&kbrd, 0x44); |
394 | chardev_push_character(&kbrd, 0x44); |
393 | break; |
395 | break; |
394 | case SC_RIGHTARR: |
396 | case SC_RIGHTARR: |
395 | chardev_push_character(&kbrd, 0x1b); |
397 | chardev_push_character(&kbrd, 0x1b); |
396 | chardev_push_character(&kbrd, 0x5b); |
398 | chardev_push_character(&kbrd, 0x5b); |
397 | chardev_push_character(&kbrd, 0x43); |
399 | chardev_push_character(&kbrd, 0x43); |
398 | break; |
400 | break; |
399 | case SC_UPARR: |
401 | case SC_UPARR: |
400 | chardev_push_character(&kbrd, 0x1b); |
402 | chardev_push_character(&kbrd, 0x1b); |
401 | chardev_push_character(&kbrd, 0x5b); |
403 | chardev_push_character(&kbrd, 0x5b); |
402 | chardev_push_character(&kbrd, 0x41); |
404 | chardev_push_character(&kbrd, 0x41); |
403 | break; |
405 | break; |
404 | case SC_DOWNARR: |
406 | case SC_DOWNARR: |
405 | chardev_push_character(&kbrd, 0x1b); |
407 | chardev_push_character(&kbrd, 0x1b); |
406 | chardev_push_character(&kbrd, 0x5b); |
408 | chardev_push_character(&kbrd, 0x5b); |
407 | chardev_push_character(&kbrd, 0x42); |
409 | chardev_push_character(&kbrd, 0x42); |
408 | break; |
410 | break; |
409 | case SC_HOME: |
411 | case SC_HOME: |
410 | chardev_push_character(&kbrd, 0x1b); |
412 | chardev_push_character(&kbrd, 0x1b); |
411 | chardev_push_character(&kbrd, 0x4f); |
413 | chardev_push_character(&kbrd, 0x4f); |
412 | chardev_push_character(&kbrd, 0x48); |
414 | chardev_push_character(&kbrd, 0x48); |
413 | break; |
415 | break; |
414 | case SC_END: |
416 | case SC_END: |
415 | chardev_push_character(&kbrd, 0x1b); |
417 | chardev_push_character(&kbrd, 0x1b); |
416 | chardev_push_character(&kbrd, 0x4f); |
418 | chardev_push_character(&kbrd, 0x4f); |
417 | chardev_push_character(&kbrd, 0x46); |
419 | chardev_push_character(&kbrd, 0x46); |
418 | break; |
420 | break; |
419 | case SC_DELETE: |
421 | case SC_DELETE: |
420 | chardev_push_character(&kbrd, 0x1b); |
422 | chardev_push_character(&kbrd, 0x1b); |
421 | chardev_push_character(&kbrd, 0x5b); |
423 | chardev_push_character(&kbrd, 0x5b); |
422 | chardev_push_character(&kbrd, 0x33); |
424 | chardev_push_character(&kbrd, 0x33); |
423 | chardev_push_character(&kbrd, 0x7e); |
425 | chardev_push_character(&kbrd, 0x7e); |
424 | break; |
426 | break; |
425 | default: |
427 | default: |
426 | letter = is_lower(ascii); |
428 | letter = is_lower(ascii); |
427 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
429 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
428 | shift = keyflags & PRESSED_SHIFT; |
430 | shift = keyflags & PRESSED_SHIFT; |
429 | if (letter && capslock) |
431 | if (letter && capslock) |
430 | shift = !shift; |
432 | shift = !shift; |
431 | if (shift) |
433 | if (shift) |
432 | map = sc_secondary_map; |
434 | map = sc_secondary_map; |
433 | chardev_push_character(&kbrd, map[sc]); |
435 | chardev_push_character(&kbrd, map[sc]); |
434 | break; |
436 | break; |
435 | } |
437 | } |
436 | spinlock_unlock(&keylock); |
438 | spinlock_unlock(&keylock); |
437 | } |
439 | } |
438 | 440 | ||
439 | /* Called from getc(). */ |
441 | /* Called from getc(). */ |
440 | void i8042_resume(chardev_t *d) |
442 | void i8042_resume(chardev_t *d) |
441 | { |
443 | { |
442 | } |
444 | } |
443 | 445 | ||
444 | /* Called from getc(). */ |
446 | /* Called from getc(). */ |
445 | void i8042_suspend(chardev_t *d) |
447 | void i8042_suspend(chardev_t *d) |
446 | { |
448 | { |
447 | } |
449 | } |
448 | 450 | ||
449 | static __u8 active_read_buff_read(void) |
451 | static __u8 active_read_buff_read(void) |
450 | { |
452 | { |
451 | static int i=0; |
453 | static int i=0; |
452 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
454 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
453 | if(!active_read_buff[i]) { |
455 | if(!active_read_buff[i]) { |
454 | return 0; |
456 | return 0; |
455 | } |
457 | } |
456 | return active_read_buff[i++]; |
458 | return active_read_buff[i++]; |
457 | } |
459 | } |
458 | 460 | ||
459 | static void active_read_buff_write(__u8 ch) |
461 | static void active_read_buff_write(__u8 ch) |
460 | { |
462 | { |
461 | static int i=0; |
463 | static int i=0; |
462 | active_read_buff[i] = ch; |
464 | active_read_buff[i] = ch; |
463 | i++; |
465 | i++; |
464 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
466 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
465 | active_read_buff[i]=0; |
467 | active_read_buff[i]=0; |
466 | } |
468 | } |
467 | 469 | ||
468 | 470 | ||
469 | static void active_read_key_pressed(__u8 sc) |
471 | static void active_read_key_pressed(__u8 sc) |
470 | { |
472 | { |
471 | char *map = sc_primary_map; |
473 | char *map = sc_primary_map; |
472 | char ascii = sc_primary_map[sc]; |
474 | char ascii = sc_primary_map[sc]; |
473 | bool shift, capslock; |
475 | bool shift, capslock; |
474 | bool letter = false; |
476 | bool letter = false; |
475 | 477 | ||
476 | /*spinlock_lock(&keylock);*/ |
478 | /*spinlock_lock(&keylock);*/ |
477 | switch (sc) { |
479 | switch (sc) { |
478 | case SC_LSHIFT: |
480 | case SC_LSHIFT: |
479 | case SC_RSHIFT: |
481 | case SC_RSHIFT: |
480 | keyflags |= PRESSED_SHIFT; |
482 | keyflags |= PRESSED_SHIFT; |
481 | break; |
483 | break; |
482 | case SC_CAPSLOCK: |
484 | case SC_CAPSLOCK: |
483 | keyflags |= PRESSED_CAPSLOCK; |
485 | keyflags |= PRESSED_CAPSLOCK; |
484 | break; |
486 | break; |
485 | case SC_SPEC_ESCAPE: |
487 | case SC_SPEC_ESCAPE: |
486 | break; |
488 | break; |
487 | case SC_LEFTARR: |
489 | case SC_LEFTARR: |
488 | active_read_buff_write(0x1b); |
490 | active_read_buff_write(0x1b); |
489 | active_read_buff_write(0x5b); |
491 | active_read_buff_write(0x5b); |
490 | active_read_buff_write(0x44); |
492 | active_read_buff_write(0x44); |
491 | break; |
493 | break; |
492 | case SC_RIGHTARR: |
494 | case SC_RIGHTARR: |
493 | active_read_buff_write(0x1b); |
495 | active_read_buff_write(0x1b); |
494 | active_read_buff_write(0x5b); |
496 | active_read_buff_write(0x5b); |
495 | active_read_buff_write(0x43); |
497 | active_read_buff_write(0x43); |
496 | break; |
498 | break; |
497 | case SC_UPARR: |
499 | case SC_UPARR: |
498 | active_read_buff_write(0x1b); |
500 | active_read_buff_write(0x1b); |
499 | active_read_buff_write(0x5b); |
501 | active_read_buff_write(0x5b); |
500 | active_read_buff_write(0x41); |
502 | active_read_buff_write(0x41); |
501 | break; |
503 | break; |
502 | case SC_DOWNARR: |
504 | case SC_DOWNARR: |
503 | active_read_buff_write(0x1b); |
505 | active_read_buff_write(0x1b); |
504 | active_read_buff_write(0x5b); |
506 | active_read_buff_write(0x5b); |
505 | active_read_buff_write(0x42); |
507 | active_read_buff_write(0x42); |
506 | break; |
508 | break; |
507 | case SC_HOME: |
509 | case SC_HOME: |
508 | active_read_buff_write(0x1b); |
510 | active_read_buff_write(0x1b); |
509 | active_read_buff_write(0x4f); |
511 | active_read_buff_write(0x4f); |
510 | active_read_buff_write(0x48); |
512 | active_read_buff_write(0x48); |
511 | break; |
513 | break; |
512 | case SC_END: |
514 | case SC_END: |
513 | active_read_buff_write(0x1b); |
515 | active_read_buff_write(0x1b); |
514 | active_read_buff_write(0x4f); |
516 | active_read_buff_write(0x4f); |
515 | active_read_buff_write(0x46); |
517 | active_read_buff_write(0x46); |
516 | break; |
518 | break; |
517 | case SC_DELETE: |
519 | case SC_DELETE: |
518 | active_read_buff_write(0x1b); |
520 | active_read_buff_write(0x1b); |
519 | active_read_buff_write(0x5b); |
521 | active_read_buff_write(0x5b); |
520 | active_read_buff_write(0x33); |
522 | active_read_buff_write(0x33); |
521 | active_read_buff_write(0x7e); |
523 | active_read_buff_write(0x7e); |
522 | break; |
524 | break; |
523 | default: |
525 | default: |
524 | letter = is_lower(ascii); |
526 | letter = is_lower(ascii); |
525 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
527 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
526 | shift = keyflags & PRESSED_SHIFT; |
528 | shift = keyflags & PRESSED_SHIFT; |
527 | if (letter && capslock) |
529 | if (letter && capslock) |
528 | shift = !shift; |
530 | shift = !shift; |
529 | if (shift) |
531 | if (shift) |
530 | map = sc_secondary_map; |
532 | map = sc_secondary_map; |
531 | active_read_buff_write(map[sc]); |
533 | active_read_buff_write(map[sc]); |
532 | break; |
534 | break; |
533 | } |
535 | } |
534 | /*spinlock_unlock(&keylock);*/ |
536 | /*spinlock_unlock(&keylock);*/ |
535 | 537 | ||
536 | } |
538 | } |
537 | 539 | ||
538 | static char key_read(chardev_t *d) |
540 | static char key_read(chardev_t *d) |
539 | { |
541 | { |
540 | char ch; |
542 | char ch; |
541 | 543 | ||
542 | while(!(ch = active_read_buff_read())) { |
544 | while(!(ch = active_read_buff_read())) { |
543 | __u8 x; |
545 | __u8 x; |
544 | while (!((x=i8042_status_read() & i8042_BUFFER_FULL_MASK))) |
546 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
545 | ; |
547 | ; |
546 | x = i8042_data_read(); |
548 | x = i8042_data_read(); |
547 | if (x != IGNORE_CODE) { |
549 | if (x != IGNORE_CODE) { |
548 | if (x & KEY_RELEASE) |
550 | if (x & KEY_RELEASE) |
549 | key_released(x ^ KEY_RELEASE); |
551 | key_released(x ^ KEY_RELEASE); |
550 | else |
552 | else |
551 | active_read_key_pressed(x); |
553 | active_read_key_pressed(x); |
552 | } |
554 | } |
553 | } |
555 | } |
554 | return ch; |
556 | return ch; |
555 | } |
557 | } |
556 | 558 | ||
557 | /** Poll for key press and release events. |
559 | /** Poll for key press and release events. |
558 | * |
560 | * |
559 | * This function can be used to implement keyboard polling. |
561 | * This function can be used to implement keyboard polling. |
560 | */ |
562 | */ |
561 | void i8042_poll(void) |
563 | void i8042_poll(void) |
562 | { |
564 | { |
563 | __u8 x; |
565 | __u8 x; |
564 | 566 | ||
565 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
567 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
566 | x = i8042_data_read(); |
568 | x = i8042_data_read(); |
567 | if (x != IGNORE_CODE) { |
569 | if (x != IGNORE_CODE) { |
568 | if (x & KEY_RELEASE) |
570 | if (x & KEY_RELEASE) |
569 | key_released(x ^ KEY_RELEASE); |
571 | key_released(x ^ KEY_RELEASE); |
570 | else |
572 | else |
571 | key_pressed(x); |
573 | key_pressed(x); |
572 | } |
574 | } |
573 | } |
575 | } |
574 | } |
576 | } |
575 | 577 | ||
576 | /** @} |
578 | /** @} |
577 | */ |
579 | */ |
578 | 580 | ||
579 | 581 |