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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2006 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: |
Line 29... | Line 29... | ||
29 | /** @addtogroup genarch |
29 | /** @addtogroup genarch |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** |
32 | /** |
33 | * @file |
33 | * @file |
34 | * @brief i8042 processor driver. |
34 | * @brief Key processing. |
35 | * |
- | |
36 | * It takes care of low-level keyboard functions. |
- | |
37 | */ |
35 | */ |
38 | 36 | ||
39 | #include <genarch/kbd/i8042.h> |
37 | #include <genarch/kbd/key.h> |
40 | #include <genarch/kbd/scanc.h> |
38 | #include <genarch/kbd/scanc.h> |
41 | #include <genarch/kbd/scanc_pc.h> |
39 | #include <genarch/kbd/scanc_pc.h> |
42 | #include <arch/drivers/i8042.h> |
- | |
43 | #include <arch/interrupt.h> |
- | |
44 | #include <cpu.h> |
- | |
45 | #include <arch/asm.h> |
- | |
46 | #include <arch.h> |
- | |
47 | #include <synch/spinlock.h> |
40 | #include <synch/spinlock.h> |
48 | #include <typedefs.h> |
- | |
49 | #include <console/chardev.h> |
41 | #include <console/chardev.h> |
50 | #include <console/console.h> |
42 | #include <typedefs.h> |
51 | #include <macros.h> |
43 | #include <macros.h> |
52 | #include <interrupt.h> |
- | |
53 | - | ||
54 | /* Keyboard commands. */ |
- | |
55 | #define KBD_ENABLE 0xf4 |
- | |
56 | #define KBD_DISABLE 0xf5 |
- | |
57 | #define KBD_ACK 0xfa |
- | |
58 | - | ||
59 | /* |
- | |
60 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
- | |
61 | * placed in 8042 command register. Format: |
- | |
62 | * |
- | |
63 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
- | |
64 | * | | | | | | | `---- 1=enable output register full interrupt |
- | |
65 | * | | | | | | `----- should be 0 |
- | |
66 | * | | | | | `------ 1=set status register system, 0=clear |
- | |
67 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
- | |
68 | * | | | `-------- disable keyboard I/O by driving clock line low |
- | |
69 | * | | `--------- disable auxiliary device, drives clock line low |
- | |
70 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
- | |
71 | * `----------- reserved, should be 0 |
- | |
72 | */ |
- | |
73 | - | ||
74 | #define i8042_SET_COMMAND 0x60 |
- | |
75 | #define i8042_COMMAND 0x69 |
- | |
76 | - | ||
77 | #define i8042_BUFFER_FULL_MASK 0x01 |
- | |
78 | #define i8042_WAIT_MASK 0x02 |
- | |
79 | #define i8042_MOUSE_DATA 0x20 |
- | |
80 | - | ||
81 | #define KEY_RELEASE 0x80 |
- | |
82 | - | ||
83 | static void key_released(uint8_t sc); |
- | |
84 | static void key_pressed(uint8_t sc); |
- | |
85 | static char key_read(chardev_t *d); |
- | |
86 | 44 | ||
87 | #define PRESSED_SHIFT (1<<0) |
45 | #define PRESSED_SHIFT (1<<0) |
88 | #define PRESSED_CAPSLOCK (1<<1) |
46 | #define PRESSED_CAPSLOCK (1<<1) |
89 | #define LOCKED_CAPSLOCK (1<<0) |
47 | #define LOCKED_CAPSLOCK (1<<0) |
90 | 48 | ||
Line 94... | Line 52... | ||
94 | 52 | ||
95 | SPINLOCK_INITIALIZE(keylock); /**< keylock protects keyflags and lockflags. */ |
53 | SPINLOCK_INITIALIZE(keylock); /**< keylock protects keyflags and lockflags. */ |
96 | static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
54 | static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
97 | static volatile int lockflags; /**< Tracking of multiple keys lockings. */ |
55 | static volatile int lockflags; /**< Tracking of multiple keys lockings. */ |
98 | 56 | ||
99 | static void i8042_suspend(chardev_t *); |
- | |
100 | static void i8042_resume(chardev_t *); |
- | |
101 | - | ||
102 | static chardev_t kbrd; |
- | |
103 | static chardev_operations_t ops = { |
- | |
104 | .suspend = i8042_suspend, |
- | |
105 | .resume = i8042_resume, |
- | |
106 | .read = key_read |
- | |
107 | }; |
- | |
108 | - | ||
109 | static void i8042_interrupt(int n, istate_t *istate); |
- | |
110 | static void i8042_wait(void); |
- | |
111 | - | ||
112 | static iroutine oldvector; |
- | |
113 | /** Initialize keyboard and service interrupts using kernel routine */ |
- | |
114 | void i8042_grab(void) |
- | |
115 | { |
- | |
116 | oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt); |
- | |
117 | i8042_wait(); |
- | |
118 | i8042_command_write(i8042_SET_COMMAND); |
- | |
119 | i8042_wait(); |
- | |
120 | i8042_data_write(i8042_COMMAND); |
- | |
121 | i8042_wait(); |
- | |
122 | } |
- | |
123 | /** Resume the former interrupt vector */ |
- | |
124 | void i8042_release(void) |
- | |
125 | { |
- | |
126 | if (oldvector) |
- | |
127 | exc_register(VECTOR_KBD, "user_interrupt", oldvector); |
- | |
128 | } |
- | |
129 | - | ||
130 | /** Initialize i8042. */ |
- | |
131 | void i8042_init(void) |
- | |
132 | { |
- | |
133 | int i; |
- | |
134 | - | ||
135 | i8042_grab(); |
- | |
136 | /* Prevent user from accidentaly releasing calling i8042_resume |
- | |
137 | * and disabling keyboard |
- | |
138 | */ |
- | |
139 | oldvector = NULL; |
- | |
140 | - | ||
141 | trap_virtual_enable_irqs(1<<IRQ_KBD); |
- | |
142 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
- | |
143 | stdin = &kbrd; |
- | |
144 | - | ||
145 | /* |
- | |
146 | * Clear input buffer. |
- | |
147 | * Number of iterations is limited to prevent infinite looping. |
- | |
148 | */ |
- | |
149 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
- | |
150 | i8042_data_read(); |
- | |
151 | } |
- | |
152 | } |
- | |
153 | - | ||
154 | /** Process i8042 interrupt. |
- | |
155 | * |
- | |
156 | * @param n Interrupt vector. |
- | |
157 | * @param istate Interrupted state. |
- | |
158 | */ |
- | |
159 | void i8042_interrupt(int n, istate_t *istate) |
- | |
160 | { |
- | |
161 | uint8_t x; |
- | |
162 | uint8_t status; |
- | |
163 | - | ||
164 | while (((status=i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
- | |
165 | x = i8042_data_read(); |
- | |
166 | - | ||
167 | if ((status & i8042_MOUSE_DATA)) |
- | |
168 | continue; |
- | |
169 | - | ||
170 | if (x & KEY_RELEASE) |
- | |
171 | key_released(x ^ KEY_RELEASE); |
- | |
172 | else |
- | |
173 | key_pressed(x); |
- | |
174 | } |
- | |
175 | trap_virtual_eoi(); |
- | |
176 | } |
- | |
177 | - | ||
178 | /** Wait until the controller reads its data. */ |
- | |
179 | void i8042_wait(void) { |
- | |
180 | while (i8042_status_read() & i8042_WAIT_MASK) { |
- | |
181 | /* wait */ |
- | |
182 | } |
- | |
183 | } |
- | |
184 | - | ||
185 | /** Process release of key. |
57 | /** Process release of key. |
186 | * |
58 | * |
187 | * @param sc Scancode of the key being released. |
59 | * @param sc Scancode of the key being released. |
188 | */ |
60 | */ |
189 | void key_released(uint8_t sc) |
61 | void key_released(uint8_t sc) |
Line 277... | Line 149... | ||
277 | break; |
149 | break; |
278 | } |
150 | } |
279 | spinlock_unlock(&keylock); |
151 | spinlock_unlock(&keylock); |
280 | } |
152 | } |
281 | 153 | ||
282 | /* Called from getc(). */ |
- | |
283 | void i8042_resume(chardev_t *d) |
- | |
284 | { |
- | |
285 | } |
- | |
286 | - | ||
287 | /* Called from getc(). */ |
- | |
288 | void i8042_suspend(chardev_t *d) |
- | |
289 | { |
- | |
290 | } |
- | |
291 | - | ||
292 | static uint8_t active_read_buff_read(void) |
154 | uint8_t active_read_buff_read(void) |
293 | { |
155 | { |
294 | static int i=0; |
156 | static int i=0; |
295 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
157 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
296 | if(!active_read_buff[i]) { |
158 | if(!active_read_buff[i]) { |
297 | return 0; |
159 | return 0; |
298 | } |
160 | } |
299 | return active_read_buff[i++]; |
161 | return active_read_buff[i++]; |
300 | } |
162 | } |
301 | 163 | ||
302 | static void active_read_buff_write(uint8_t ch) |
164 | void active_read_buff_write(uint8_t ch) |
303 | { |
165 | { |
304 | static int i=0; |
166 | static int i=0; |
305 | active_read_buff[i] = ch; |
167 | active_read_buff[i] = ch; |
306 | i++; |
168 | i++; |
307 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
169 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
308 | active_read_buff[i]=0; |
170 | active_read_buff[i]=0; |
309 | } |
171 | } |
310 | 172 | ||
311 | 173 | ||
312 | static void active_read_key_pressed(uint8_t sc) |
174 | void active_read_key_pressed(uint8_t sc) |
313 | { |
175 | { |
314 | char *map = sc_primary_map; |
176 | char *map = sc_primary_map; |
315 | char ascii = sc_primary_map[sc]; |
177 | char ascii = sc_primary_map[sc]; |
316 | bool shift, capslock; |
178 | bool shift, capslock; |
317 | bool letter = false; |
179 | bool letter = false; |
Line 376... | Line 238... | ||
376 | } |
238 | } |
377 | /*spinlock_unlock(&keylock);*/ |
239 | /*spinlock_unlock(&keylock);*/ |
378 | 240 | ||
379 | } |
241 | } |
380 | 242 | ||
381 | static char key_read(chardev_t *d) |
- | |
382 | { |
- | |
383 | char ch; |
- | |
384 | - | ||
385 | while(!(ch = active_read_buff_read())) { |
- | |
386 | uint8_t x; |
- | |
387 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
- | |
388 | ; |
- | |
389 | x = i8042_data_read(); |
- | |
390 | if (x & KEY_RELEASE) |
- | |
391 | key_released(x ^ KEY_RELEASE); |
- | |
392 | else |
- | |
393 | active_read_key_pressed(x); |
- | |
394 | } |
- | |
395 | return ch; |
- | |
396 | } |
- | |
397 | - | ||
398 | /** Poll for key press and release events. |
- | |
399 | * |
- | |
400 | * This function can be used to implement keyboard polling. |
- | |
401 | */ |
- | |
402 | void i8042_poll(void) |
- | |
403 | { |
- | |
404 | uint8_t x; |
- | |
405 | - | ||
406 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
- | |
407 | x = i8042_data_read(); |
- | |
408 | if (x & KEY_RELEASE) |
- | |
409 | key_released(x ^ KEY_RELEASE); |
- | |
410 | else |
- | |
411 | key_pressed(x); |
- | |
412 | } |
- | |
413 | } |
- | |
414 | - | ||
415 | /** @} |
243 | /** @} |
416 | */ |
244 | */ |