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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 | /** |
32 | /** |
33 | * @file |
33 | * @file |
34 | * @brief i8042 processor driver. |
34 | * @brief i8042 processor driver. |
35 | * |
35 | * |
36 | * It takes care of low-level keyboard functions. |
36 | * It takes care of low-level keyboard functions. |
37 | */ |
37 | */ |
38 | 38 | ||
39 | #include <genarch/i8042/i8042.h> |
39 | #include <genarch/i8042/i8042.h> |
40 | #include <arch/drivers/i8042.h> |
40 | #include <arch/drivers/i8042.h> |
41 | #include <arch/interrupt.h> |
41 | #include <arch/interrupt.h> |
42 | #include <cpu.h> |
42 | #include <cpu.h> |
43 | #include <arch/asm.h> |
43 | #include <arch/asm.h> |
44 | #include <arch.h> |
44 | #include <arch.h> |
45 | #include <synch/spinlock.h> |
45 | #include <synch/spinlock.h> |
46 | #include <typedefs.h> |
46 | #include <typedefs.h> |
47 | #include <console/chardev.h> |
47 | #include <console/chardev.h> |
48 | #include <console/console.h> |
48 | #include <console/console.h> |
49 | #include <macros.h> |
49 | #include <macros.h> |
50 | #include <interrupt.h> |
50 | #include <interrupt.h> |
51 | 51 | ||
52 | /* Keyboard commands. */ |
52 | /* Keyboard commands. */ |
53 | #define KBD_ENABLE 0xf4 |
53 | #define KBD_ENABLE 0xf4 |
54 | #define KBD_DISABLE 0xf5 |
54 | #define KBD_DISABLE 0xf5 |
55 | #define KBD_ACK 0xfa |
55 | #define KBD_ACK 0xfa |
56 | 56 | ||
57 | /* |
57 | /* |
58 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
58 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
59 | * placed in 8042 command register. Format: |
59 | * placed in 8042 command register. Format: |
60 | * |
60 | * |
61 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
61 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
62 | * | | | | | | | `---- 1=enable output register full interrupt |
62 | * | | | | | | | `---- 1=enable output register full interrupt |
63 | * | | | | | | `----- should be 0 |
63 | * | | | | | | `----- should be 0 |
64 | * | | | | | `------ 1=set status register system, 0=clear |
64 | * | | | | | `------ 1=set status register system, 0=clear |
65 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
65 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
66 | * | | | `-------- disable keyboard I/O by driving clock line low |
66 | * | | | `-------- disable keyboard I/O by driving clock line low |
67 | * | | `--------- disable auxiliary device, drives clock line low |
67 | * | | `--------- disable auxiliary device, drives clock line low |
68 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
68 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
69 | * `----------- reserved, should be 0 |
69 | * `----------- reserved, should be 0 |
70 | */ |
70 | */ |
71 | 71 | ||
72 | #define i8042_SET_COMMAND 0x60 |
72 | #define i8042_SET_COMMAND 0x60 |
73 | #define i8042_COMMAND 0x69 |
73 | #define i8042_COMMAND 0x69 |
74 | 74 | ||
75 | #define i8042_BUFFER_FULL_MASK 0x01 |
75 | #define i8042_BUFFER_FULL_MASK 0x01 |
76 | #define i8042_WAIT_MASK 0x02 |
76 | #define i8042_WAIT_MASK 0x02 |
77 | #define i8042_MOUSE_DATA 0x20 |
77 | #define i8042_MOUSE_DATA 0x20 |
78 | 78 | ||
79 | #define KEY_RELEASE 0x80 |
79 | #define KEY_RELEASE 0x80 |
80 | 80 | ||
81 | /** |
81 | /** |
82 | * These codes read from i8042 data register are silently ignored. |
82 | * These codes read from i8042 data register are silently ignored. |
83 | */ |
83 | */ |
84 | #define IGNORE_CODE 0x7f |
84 | #define IGNORE_CODE 0x7f |
85 | 85 | ||
86 | static void key_released(uint8_t sc); |
86 | static void key_released(uint8_t sc); |
87 | static void key_pressed(uint8_t sc); |
87 | static void key_pressed(uint8_t sc); |
88 | static char key_read(chardev_t *d); |
88 | static char key_read(chardev_t *d); |
89 | 89 | ||
90 | #define PRESSED_SHIFT (1<<0) |
90 | #define PRESSED_SHIFT (1<<0) |
91 | #define PRESSED_CAPSLOCK (1<<1) |
91 | #define PRESSED_CAPSLOCK (1<<1) |
92 | #define LOCKED_CAPSLOCK (1<<0) |
92 | #define LOCKED_CAPSLOCK (1<<0) |
93 | 93 | ||
94 | #define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */ |
94 | #define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */ |
95 | 95 | ||
96 | static uint8_t active_read_buff[ACTIVE_READ_BUFF_SIZE]; |
96 | static uint8_t active_read_buff[ACTIVE_READ_BUFF_SIZE]; |
97 | 97 | ||
98 | SPINLOCK_INITIALIZE(keylock); /**< keylock protects keyflags and lockflags. */ |
98 | SPINLOCK_INITIALIZE(keylock); /**< keylock protects keyflags and lockflags. */ |
99 | static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
99 | static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
100 | static volatile int lockflags; /**< Tracking of multiple keys lockings. */ |
100 | static volatile int lockflags; /**< Tracking of multiple keys lockings. */ |
101 | 101 | ||
102 | static void i8042_suspend(chardev_t *); |
102 | static void i8042_suspend(chardev_t *); |
103 | static void i8042_resume(chardev_t *); |
103 | static void i8042_resume(chardev_t *); |
104 | 104 | ||
105 | static chardev_t kbrd; |
105 | static chardev_t kbrd; |
106 | static chardev_operations_t ops = { |
106 | static chardev_operations_t ops = { |
107 | .suspend = i8042_suspend, |
107 | .suspend = i8042_suspend, |
108 | .resume = i8042_resume, |
108 | .resume = i8042_resume, |
109 | .read = key_read |
109 | .read = key_read |
110 | }; |
110 | }; |
111 | 111 | ||
112 | static void i8042_interrupt(int n, istate_t *istate); |
112 | static void i8042_interrupt(int n, istate_t *istate); |
113 | static void i8042_wait(void); |
113 | static void i8042_wait(void); |
114 | 114 | ||
115 | static iroutine oldvector; |
115 | static iroutine oldvector; |
116 | /** Initialize keyboard and service interrupts using kernel routine */ |
116 | /** Initialize keyboard and service interrupts using kernel routine */ |
117 | void i8042_grab(void) |
117 | void i8042_grab(void) |
118 | { |
118 | { |
119 | oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt); |
119 | oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt); |
120 | i8042_wait(); |
120 | i8042_wait(); |
121 | i8042_command_write(i8042_SET_COMMAND); |
121 | i8042_command_write(i8042_SET_COMMAND); |
122 | i8042_wait(); |
122 | i8042_wait(); |
123 | i8042_data_write(i8042_COMMAND); |
123 | i8042_data_write(i8042_COMMAND); |
124 | i8042_wait(); |
124 | i8042_wait(); |
125 | } |
125 | } |
126 | /** Resume the former interrupt vector */ |
126 | /** Resume the former interrupt vector */ |
127 | void i8042_release(void) |
127 | void i8042_release(void) |
128 | { |
128 | { |
129 | if (oldvector) |
129 | if (oldvector) |
130 | exc_register(VECTOR_KBD, "user_interrupt", oldvector); |
130 | exc_register(VECTOR_KBD, "user_interrupt", oldvector); |
131 | } |
131 | } |
132 | 132 | ||
133 | /** Initialize i8042. */ |
133 | /** Initialize i8042. */ |
134 | void i8042_init(void) |
134 | void i8042_init(void) |
135 | { |
135 | { |
136 | int i; |
136 | int i; |
137 | 137 | ||
138 | i8042_grab(); |
138 | i8042_grab(); |
139 | /* Prevent user from accidentaly releasing calling i8042_resume |
139 | /* Prevent user from accidentaly releasing calling i8042_resume |
140 | * and disabling keyboard |
140 | * and disabling keyboard |
141 | */ |
141 | */ |
142 | oldvector = NULL; |
142 | oldvector = NULL; |
143 | 143 | ||
144 | trap_virtual_enable_irqs(1<<IRQ_KBD); |
144 | trap_virtual_enable_irqs(1<<IRQ_KBD); |
145 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
145 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
146 | stdin = &kbrd; |
146 | stdin = &kbrd; |
147 | 147 | ||
148 | /* |
148 | /* |
149 | * Clear input buffer. |
149 | * Clear input buffer. |
150 | * Number of iterations is limited to prevent infinite looping. |
150 | * Number of iterations is limited to prevent infinite looping. |
151 | */ |
151 | */ |
152 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
152 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
153 | i8042_data_read(); |
153 | i8042_data_read(); |
154 | } |
154 | } |
155 | } |
155 | } |
156 | 156 | ||
157 | /** Process i8042 interrupt. |
157 | /** Process i8042 interrupt. |
158 | * |
158 | * |
159 | * @param n Interrupt vector. |
159 | * @param n Interrupt vector. |
160 | * @param istate Interrupted state. |
160 | * @param istate Interrupted state. |
161 | */ |
161 | */ |
162 | void i8042_interrupt(int n, istate_t *istate) |
162 | void i8042_interrupt(int n, istate_t *istate) |
163 | { |
163 | { |
164 | uint8_t x; |
164 | uint8_t x; |
165 | uint8_t status; |
165 | uint8_t status; |
166 | 166 | ||
167 | while (((status=i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
167 | while (((status=i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
168 | x = i8042_data_read(); |
168 | x = i8042_data_read(); |
169 | 169 | ||
170 | if ((status & i8042_MOUSE_DATA)) |
170 | if ((status & i8042_MOUSE_DATA)) |
171 | continue; |
171 | continue; |
172 | 172 | ||
173 | if (x & KEY_RELEASE) |
173 | if (x & KEY_RELEASE) |
174 | key_released(x ^ KEY_RELEASE); |
174 | key_released(x ^ KEY_RELEASE); |
175 | else |
175 | else |
176 | key_pressed(x); |
176 | key_pressed(x); |
177 | } |
177 | } |
178 | trap_virtual_eoi(); |
178 | trap_virtual_eoi(); |
179 | } |
179 | } |
180 | 180 | ||
181 | /** Wait until the controller reads its data. */ |
181 | /** Wait until the controller reads its data. */ |
182 | void i8042_wait(void) { |
182 | void i8042_wait(void) { |
183 | while (i8042_status_read() & i8042_WAIT_MASK) { |
183 | while (i8042_status_read() & i8042_WAIT_MASK) { |
184 | /* wait */ |
184 | /* wait */ |
185 | } |
185 | } |
186 | } |
186 | } |
187 | 187 | ||
188 | /** Process release of key. |
188 | /** Process release of key. |
189 | * |
189 | * |
190 | * @param sc Scancode of the key being released. |
190 | * @param sc Scancode of the key being released. |
191 | */ |
191 | */ |
192 | void key_released(uint8_t sc) |
192 | void key_released(uint8_t sc) |
193 | { |
193 | { |
194 | spinlock_lock(&keylock); |
194 | spinlock_lock(&keylock); |
195 | switch (sc) { |
195 | switch (sc) { |
196 | case SC_LSHIFT: |
196 | case SC_LSHIFT: |
197 | case SC_RSHIFT: |
197 | case SC_RSHIFT: |
198 | keyflags &= ~PRESSED_SHIFT; |
198 | keyflags &= ~PRESSED_SHIFT; |
199 | break; |
199 | break; |
200 | case SC_CAPSLOCK: |
200 | case SC_CAPSLOCK: |
201 | keyflags &= ~PRESSED_CAPSLOCK; |
201 | keyflags &= ~PRESSED_CAPSLOCK; |
202 | if (lockflags & LOCKED_CAPSLOCK) |
202 | if (lockflags & LOCKED_CAPSLOCK) |
203 | lockflags &= ~LOCKED_CAPSLOCK; |
203 | lockflags &= ~LOCKED_CAPSLOCK; |
204 | else |
204 | else |
205 | lockflags |= LOCKED_CAPSLOCK; |
205 | lockflags |= LOCKED_CAPSLOCK; |
206 | break; |
206 | break; |
207 | default: |
207 | default: |
208 | break; |
208 | break; |
209 | } |
209 | } |
210 | spinlock_unlock(&keylock); |
210 | spinlock_unlock(&keylock); |
211 | } |
211 | } |
212 | 212 | ||
213 | /** Process keypress. |
213 | /** Process keypress. |
214 | * |
214 | * |
215 | * @param sc Scancode of the key being pressed. |
215 | * @param sc Scancode of the key being pressed. |
216 | */ |
216 | */ |
217 | void key_pressed(uint8_t sc) |
217 | void key_pressed(uint8_t sc) |
218 | { |
218 | { |
219 | char *map = sc_primary_map; |
219 | char *map = sc_primary_map; |
220 | char ascii = sc_primary_map[sc]; |
220 | char ascii = sc_primary_map[sc]; |
221 | bool shift, capslock; |
221 | bool shift, capslock; |
222 | bool letter = false; |
222 | bool letter = false; |
223 | 223 | ||
224 | spinlock_lock(&keylock); |
224 | spinlock_lock(&keylock); |
225 | switch (sc) { |
225 | switch (sc) { |
226 | case SC_LSHIFT: |
226 | case SC_LSHIFT: |
227 | case SC_RSHIFT: |
227 | case SC_RSHIFT: |
228 | keyflags |= PRESSED_SHIFT; |
228 | keyflags |= PRESSED_SHIFT; |
229 | break; |
229 | break; |
230 | case SC_CAPSLOCK: |
230 | case SC_CAPSLOCK: |
231 | keyflags |= PRESSED_CAPSLOCK; |
231 | keyflags |= PRESSED_CAPSLOCK; |
232 | break; |
232 | break; |
233 | case SC_SPEC_ESCAPE: |
233 | case SC_SPEC_ESCAPE: |
234 | break; |
234 | break; |
235 | case SC_LEFTARR: |
235 | case SC_LEFTARR: |
236 | chardev_push_character(&kbrd, 0x1b); |
236 | chardev_push_character(&kbrd, 0x1b); |
237 | chardev_push_character(&kbrd, 0x5b); |
237 | chardev_push_character(&kbrd, 0x5b); |
238 | chardev_push_character(&kbrd, 0x44); |
238 | chardev_push_character(&kbrd, 0x44); |
239 | break; |
239 | break; |
240 | case SC_RIGHTARR: |
240 | case SC_RIGHTARR: |
241 | chardev_push_character(&kbrd, 0x1b); |
241 | chardev_push_character(&kbrd, 0x1b); |
242 | chardev_push_character(&kbrd, 0x5b); |
242 | chardev_push_character(&kbrd, 0x5b); |
243 | chardev_push_character(&kbrd, 0x43); |
243 | chardev_push_character(&kbrd, 0x43); |
244 | break; |
244 | break; |
245 | case SC_UPARR: |
245 | case SC_UPARR: |
246 | chardev_push_character(&kbrd, 0x1b); |
246 | chardev_push_character(&kbrd, 0x1b); |
247 | chardev_push_character(&kbrd, 0x5b); |
247 | chardev_push_character(&kbrd, 0x5b); |
248 | chardev_push_character(&kbrd, 0x41); |
248 | chardev_push_character(&kbrd, 0x41); |
249 | break; |
249 | break; |
250 | case SC_DOWNARR: |
250 | case SC_DOWNARR: |
251 | chardev_push_character(&kbrd, 0x1b); |
251 | chardev_push_character(&kbrd, 0x1b); |
252 | chardev_push_character(&kbrd, 0x5b); |
252 | chardev_push_character(&kbrd, 0x5b); |
253 | chardev_push_character(&kbrd, 0x42); |
253 | chardev_push_character(&kbrd, 0x42); |
254 | break; |
254 | break; |
255 | case SC_HOME: |
255 | case SC_HOME: |
256 | chardev_push_character(&kbrd, 0x1b); |
256 | chardev_push_character(&kbrd, 0x1b); |
257 | chardev_push_character(&kbrd, 0x4f); |
257 | chardev_push_character(&kbrd, 0x4f); |
258 | chardev_push_character(&kbrd, 0x48); |
258 | chardev_push_character(&kbrd, 0x48); |
259 | break; |
259 | break; |
260 | case SC_END: |
260 | case SC_END: |
261 | chardev_push_character(&kbrd, 0x1b); |
261 | chardev_push_character(&kbrd, 0x1b); |
262 | chardev_push_character(&kbrd, 0x4f); |
262 | chardev_push_character(&kbrd, 0x4f); |
263 | chardev_push_character(&kbrd, 0x46); |
263 | chardev_push_character(&kbrd, 0x46); |
264 | break; |
264 | break; |
265 | case SC_DELETE: |
265 | case SC_DELETE: |
266 | chardev_push_character(&kbrd, 0x1b); |
266 | chardev_push_character(&kbrd, 0x1b); |
267 | chardev_push_character(&kbrd, 0x5b); |
267 | chardev_push_character(&kbrd, 0x5b); |
268 | chardev_push_character(&kbrd, 0x33); |
268 | chardev_push_character(&kbrd, 0x33); |
269 | chardev_push_character(&kbrd, 0x7e); |
269 | chardev_push_character(&kbrd, 0x7e); |
270 | break; |
270 | break; |
271 | default: |
271 | default: |
272 | letter = is_lower(ascii); |
272 | letter = is_lower(ascii); |
273 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
273 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
274 | shift = keyflags & PRESSED_SHIFT; |
274 | shift = keyflags & PRESSED_SHIFT; |
275 | if (letter && capslock) |
275 | if (letter && capslock) |
276 | shift = !shift; |
276 | shift = !shift; |
277 | if (shift) |
277 | if (shift) |
278 | map = sc_secondary_map; |
278 | map = sc_secondary_map; |
279 | chardev_push_character(&kbrd, map[sc]); |
279 | chardev_push_character(&kbrd, map[sc]); |
280 | break; |
280 | break; |
281 | } |
281 | } |
282 | spinlock_unlock(&keylock); |
282 | spinlock_unlock(&keylock); |
283 | } |
283 | } |
284 | 284 | ||
285 | /* Called from getc(). */ |
285 | /* Called from getc(). */ |
286 | void i8042_resume(chardev_t *d) |
286 | void i8042_resume(chardev_t *d) |
287 | { |
287 | { |
288 | } |
288 | } |
289 | 289 | ||
290 | /* Called from getc(). */ |
290 | /* Called from getc(). */ |
291 | void i8042_suspend(chardev_t *d) |
291 | void i8042_suspend(chardev_t *d) |
292 | { |
292 | { |
293 | } |
293 | } |
294 | 294 | ||
295 | static uint8_t active_read_buff_read(void) |
295 | static uint8_t active_read_buff_read(void) |
296 | { |
296 | { |
297 | static int i=0; |
297 | static int i=0; |
298 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
298 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
299 | if(!active_read_buff[i]) { |
299 | if(!active_read_buff[i]) { |
300 | return 0; |
300 | return 0; |
301 | } |
301 | } |
302 | return active_read_buff[i++]; |
302 | return active_read_buff[i++]; |
303 | } |
303 | } |
304 | 304 | ||
305 | static void active_read_buff_write(uint8_t ch) |
305 | static void active_read_buff_write(uint8_t ch) |
306 | { |
306 | { |
307 | static int i=0; |
307 | static int i=0; |
308 | active_read_buff[i] = ch; |
308 | active_read_buff[i] = ch; |
309 | i++; |
309 | i++; |
310 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
310 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
311 | active_read_buff[i]=0; |
311 | active_read_buff[i]=0; |
312 | } |
312 | } |
313 | 313 | ||
314 | 314 | ||
315 | static void active_read_key_pressed(uint8_t sc) |
315 | static void active_read_key_pressed(uint8_t sc) |
316 | { |
316 | { |
317 | char *map = sc_primary_map; |
317 | char *map = sc_primary_map; |
318 | char ascii = sc_primary_map[sc]; |
318 | char ascii = sc_primary_map[sc]; |
319 | bool shift, capslock; |
319 | bool shift, capslock; |
320 | bool letter = false; |
320 | bool letter = false; |
321 | 321 | ||
322 | /*spinlock_lock(&keylock);*/ |
322 | /*spinlock_lock(&keylock);*/ |
323 | switch (sc) { |
323 | switch (sc) { |
324 | case SC_LSHIFT: |
324 | case SC_LSHIFT: |
325 | case SC_RSHIFT: |
325 | case SC_RSHIFT: |
326 | keyflags |= PRESSED_SHIFT; |
326 | keyflags |= PRESSED_SHIFT; |
327 | break; |
327 | break; |
328 | case SC_CAPSLOCK: |
328 | case SC_CAPSLOCK: |
329 | keyflags |= PRESSED_CAPSLOCK; |
329 | keyflags |= PRESSED_CAPSLOCK; |
330 | break; |
330 | break; |
331 | case SC_SPEC_ESCAPE: |
331 | case SC_SPEC_ESCAPE: |
332 | break; |
332 | break; |
333 | case SC_LEFTARR: |
333 | case SC_LEFTARR: |
334 | active_read_buff_write(0x1b); |
334 | active_read_buff_write(0x1b); |
335 | active_read_buff_write(0x5b); |
335 | active_read_buff_write(0x5b); |
336 | active_read_buff_write(0x44); |
336 | active_read_buff_write(0x44); |
337 | break; |
337 | break; |
338 | case SC_RIGHTARR: |
338 | case SC_RIGHTARR: |
339 | active_read_buff_write(0x1b); |
339 | active_read_buff_write(0x1b); |
340 | active_read_buff_write(0x5b); |
340 | active_read_buff_write(0x5b); |
341 | active_read_buff_write(0x43); |
341 | active_read_buff_write(0x43); |
342 | break; |
342 | break; |
343 | case SC_UPARR: |
343 | case SC_UPARR: |
344 | active_read_buff_write(0x1b); |
344 | active_read_buff_write(0x1b); |
345 | active_read_buff_write(0x5b); |
345 | active_read_buff_write(0x5b); |
346 | active_read_buff_write(0x41); |
346 | active_read_buff_write(0x41); |
347 | break; |
347 | break; |
348 | case SC_DOWNARR: |
348 | case SC_DOWNARR: |
349 | active_read_buff_write(0x1b); |
349 | active_read_buff_write(0x1b); |
350 | active_read_buff_write(0x5b); |
350 | active_read_buff_write(0x5b); |
351 | active_read_buff_write(0x42); |
351 | active_read_buff_write(0x42); |
352 | break; |
352 | break; |
353 | case SC_HOME: |
353 | case SC_HOME: |
354 | active_read_buff_write(0x1b); |
354 | active_read_buff_write(0x1b); |
355 | active_read_buff_write(0x4f); |
355 | active_read_buff_write(0x4f); |
356 | active_read_buff_write(0x48); |
356 | active_read_buff_write(0x48); |
357 | break; |
357 | break; |
358 | case SC_END: |
358 | case SC_END: |
359 | active_read_buff_write(0x1b); |
359 | active_read_buff_write(0x1b); |
360 | active_read_buff_write(0x4f); |
360 | active_read_buff_write(0x4f); |
361 | active_read_buff_write(0x46); |
361 | active_read_buff_write(0x46); |
362 | break; |
362 | break; |
363 | case SC_DELETE: |
363 | case SC_DELETE: |
364 | active_read_buff_write(0x1b); |
364 | active_read_buff_write(0x1b); |
365 | active_read_buff_write(0x5b); |
365 | active_read_buff_write(0x5b); |
366 | active_read_buff_write(0x33); |
366 | active_read_buff_write(0x33); |
367 | active_read_buff_write(0x7e); |
367 | active_read_buff_write(0x7e); |
368 | break; |
368 | break; |
369 | default: |
369 | default: |
370 | letter = is_lower(ascii); |
370 | letter = is_lower(ascii); |
371 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
371 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
372 | shift = keyflags & PRESSED_SHIFT; |
372 | shift = keyflags & PRESSED_SHIFT; |
373 | if (letter && capslock) |
373 | if (letter && capslock) |
374 | shift = !shift; |
374 | shift = !shift; |
375 | if (shift) |
375 | if (shift) |
376 | map = sc_secondary_map; |
376 | map = sc_secondary_map; |
377 | active_read_buff_write(map[sc]); |
377 | active_read_buff_write(map[sc]); |
378 | break; |
378 | break; |
379 | } |
379 | } |
380 | /*spinlock_unlock(&keylock);*/ |
380 | /*spinlock_unlock(&keylock);*/ |
381 | 381 | ||
382 | } |
382 | } |
383 | 383 | ||
384 | static char key_read(chardev_t *d) |
384 | static char key_read(chardev_t *d) |
385 | { |
385 | { |
386 | char ch; |
386 | char ch; |
387 | 387 | ||
388 | while(!(ch = active_read_buff_read())) { |
388 | while(!(ch = active_read_buff_read())) { |
389 | uint8_t x; |
389 | uint8_t x; |
390 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
390 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
391 | ; |
391 | ; |
392 | x = i8042_data_read(); |
392 | x = i8042_data_read(); |
393 | if (x != IGNORE_CODE) { |
393 | if (x != IGNORE_CODE) { |
394 | if (x & KEY_RELEASE) |
394 | if (x & KEY_RELEASE) |
395 | key_released(x ^ KEY_RELEASE); |
395 | key_released(x ^ KEY_RELEASE); |
396 | else |
396 | else |
397 | active_read_key_pressed(x); |
397 | active_read_key_pressed(x); |
398 | } |
398 | } |
399 | } |
399 | } |
400 | return ch; |
400 | return ch; |
401 | } |
401 | } |
402 | 402 | ||
403 | /** Poll for key press and release events. |
403 | /** Poll for key press and release events. |
404 | * |
404 | * |
405 | * This function can be used to implement keyboard polling. |
405 | * This function can be used to implement keyboard polling. |
406 | */ |
406 | */ |
407 | void i8042_poll(void) |
407 | void i8042_poll(void) |
408 | { |
408 | { |
409 | uint8_t x; |
409 | uint8_t x; |
410 | 410 | ||
411 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
411 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
412 | x = i8042_data_read(); |
412 | x = i8042_data_read(); |
413 | if (x != IGNORE_CODE) { |
413 | if (x != IGNORE_CODE) { |
414 | if (x & KEY_RELEASE) |
414 | if (x & KEY_RELEASE) |
415 | key_released(x ^ KEY_RELEASE); |
415 | key_released(x ^ KEY_RELEASE); |
416 | else |
416 | else |
417 | key_pressed(x); |
417 | key_pressed(x); |
418 | } |
418 | } |
419 | } |
419 | } |
420 | } |
420 | } |
421 | 421 | ||
422 | /** @} |
422 | /** @} |
423 | */ |
423 | */ |
424 | 424 | ||
425 | 425 |