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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/kbd/i8042.h> |
39 | #include <genarch/kbd/i8042.h> |
40 | #include <genarch/kbd/key.h> |
40 | #include <genarch/kbd/key.h> |
41 | #include <genarch/kbd/scanc.h> |
41 | #include <genarch/kbd/scanc.h> |
42 | #include <genarch/kbd/scanc_pc.h> |
42 | #include <genarch/kbd/scanc_pc.h> |
43 | #include <arch/drivers/i8042.h> |
43 | #include <arch/drivers/i8042.h> |
44 | #include <cpu.h> |
44 | #include <cpu.h> |
45 | #include <arch/asm.h> |
45 | #include <arch/asm.h> |
46 | #include <arch.h> |
46 | #include <arch.h> |
47 | #include <typedefs.h> |
47 | #include <typedefs.h> |
48 | #include <console/chardev.h> |
48 | #include <console/chardev.h> |
49 | #include <console/console.h> |
49 | #include <console/console.h> |
50 | #include <interrupt.h> |
50 | #include <interrupt.h> |
51 | #include <sysinfo/sysinfo.h> |
51 | #include <sysinfo/sysinfo.h> |
52 | #include <ddi/irq.h> |
52 | #include <ddi/irq.h> |
53 | 53 | ||
54 | /* Keyboard commands. */ |
54 | /* Keyboard commands. */ |
55 | #define KBD_ENABLE 0xf4 |
55 | #define KBD_ENABLE 0xf4 |
56 | #define KBD_DISABLE 0xf5 |
56 | #define KBD_DISABLE 0xf5 |
57 | #define KBD_ACK 0xfa |
57 | #define KBD_ACK 0xfa |
58 | 58 | ||
59 | /* |
59 | /* |
60 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
60 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
61 | * placed in 8042 command register. Format: |
61 | * placed in 8042 command register. Format: |
62 | * |
62 | * |
63 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
63 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
64 | * | | | | | | | `---- 1=enable output register full interrupt |
64 | * | | | | | | | `---- 1=enable output register full interrupt |
65 | * | | | | | | `----- should be 0 |
65 | * | | | | | | `----- should be 0 |
66 | * | | | | | `------ 1=set status register system, 0=clear |
66 | * | | | | | `------ 1=set status register system, 0=clear |
67 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
67 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
68 | * | | | `-------- disable keyboard I/O by driving clock line low |
68 | * | | | `-------- disable keyboard I/O by driving clock line low |
69 | * | | `--------- disable auxiliary device, drives clock line low |
69 | * | | `--------- disable auxiliary device, drives clock line low |
70 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
70 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
71 | * `----------- reserved, should be 0 |
71 | * `----------- reserved, should be 0 |
72 | */ |
72 | */ |
73 | 73 | ||
74 | #define i8042_SET_COMMAND 0x60 |
74 | #define i8042_SET_COMMAND 0x60 |
75 | #define i8042_COMMAND 0x69 |
75 | #define i8042_COMMAND 0x69 |
76 | 76 | ||
77 | #define i8042_BUFFER_FULL_MASK 0x01 |
77 | #define i8042_BUFFER_FULL_MASK 0x01 |
78 | #define i8042_WAIT_MASK 0x02 |
78 | #define i8042_WAIT_MASK 0x02 |
79 | #define i8042_MOUSE_DATA 0x20 |
79 | #define i8042_MOUSE_DATA 0x20 |
80 | 80 | ||
81 | static void i8042_suspend(chardev_t *); |
81 | static void i8042_suspend(chardev_t *); |
82 | static void i8042_resume(chardev_t *); |
82 | static void i8042_resume(chardev_t *); |
83 | 83 | ||
84 | static chardev_operations_t ops = { |
84 | static chardev_operations_t ops = { |
85 | .suspend = i8042_suspend, |
85 | .suspend = i8042_suspend, |
86 | .resume = i8042_resume, |
86 | .resume = i8042_resume, |
87 | .read = i8042_key_read |
87 | .read = i8042_key_read |
88 | }; |
88 | }; |
89 | 89 | ||
90 | /** Structure for i8042's IRQ. */ |
90 | /** Structure for i8042's IRQ. */ |
91 | static irq_t i8042_kbd_irq; |
91 | static irq_t i8042_kbd_irq; |
92 | static irq_t i8042_mouse_irq; |
92 | static irq_t i8042_mouse_irq; |
93 | 93 | ||
94 | /** Wait until the controller reads its data. */ |
94 | /** Wait until the controller reads its data. */ |
95 | static void i8042_wait(void) { |
95 | static void i8042_wait(void) { |
96 | while (i8042_status_read() & i8042_WAIT_MASK) { |
96 | while (i8042_status_read() & i8042_WAIT_MASK) { |
97 | /* wait */ |
97 | /* wait */ |
98 | } |
98 | } |
99 | } |
99 | } |
100 | 100 | ||
101 | void i8042_grab(void) |
101 | void i8042_grab(void) |
102 | { |
102 | { |
103 | ipl_t ipl = interrupts_disable(); |
103 | ipl_t ipl = interrupts_disable(); |
104 | 104 | ||
105 | i8042_wait(); |
105 | i8042_wait(); |
106 | i8042_command_write(i8042_SET_COMMAND); |
106 | i8042_command_write(i8042_SET_COMMAND); |
107 | i8042_wait(); |
107 | i8042_wait(); |
108 | i8042_data_write(i8042_COMMAND); |
108 | i8042_data_write(i8042_COMMAND); |
109 | i8042_wait(); |
109 | i8042_wait(); |
110 | 110 | ||
111 | spinlock_lock(&i8042_kbd_irq.lock); |
111 | spinlock_lock(&i8042_kbd_irq.lock); |
112 | i8042_kbd_irq.notif_cfg.notify = false; |
112 | i8042_kbd_irq.notif_cfg.notify = false; |
113 | spinlock_unlock(&i8042_kbd_irq.lock); |
113 | spinlock_unlock(&i8042_kbd_irq.lock); |
114 | 114 | ||
115 | spinlock_lock(&i8042_mouse_irq.lock); |
115 | spinlock_lock(&i8042_mouse_irq.lock); |
116 | i8042_mouse_irq.notif_cfg.notify = false; |
116 | i8042_mouse_irq.notif_cfg.notify = false; |
117 | spinlock_unlock(&i8042_mouse_irq.lock); |
117 | spinlock_unlock(&i8042_mouse_irq.lock); |
118 | 118 | ||
119 | interrupts_restore(ipl); |
119 | interrupts_restore(ipl); |
120 | } |
120 | } |
121 | 121 | ||
122 | void i8042_release(void) |
122 | void i8042_release(void) |
123 | { |
123 | { |
124 | ipl_t ipl = interrupts_disable(); |
124 | ipl_t ipl = interrupts_disable(); |
125 | 125 | ||
126 | spinlock_lock(&i8042_kbd_irq.lock); |
126 | spinlock_lock(&i8042_kbd_irq.lock); |
127 | if (i8042_kbd_irq.notif_cfg.answerbox) |
127 | if (i8042_kbd_irq.notif_cfg.answerbox) |
128 | i8042_kbd_irq.notif_cfg.notify = true; |
128 | i8042_kbd_irq.notif_cfg.notify = true; |
129 | spinlock_unlock(&i8042_kbd_irq.lock); |
129 | spinlock_unlock(&i8042_kbd_irq.lock); |
130 | 130 | ||
131 | spinlock_lock(&i8042_mouse_irq.lock); |
131 | spinlock_lock(&i8042_mouse_irq.lock); |
132 | if (i8042_mouse_irq.notif_cfg.answerbox) |
132 | if (i8042_mouse_irq.notif_cfg.answerbox) |
133 | i8042_mouse_irq.notif_cfg.notify = true; |
133 | i8042_mouse_irq.notif_cfg.notify = true; |
134 | spinlock_unlock(&i8042_mouse_irq.lock); |
134 | spinlock_unlock(&i8042_mouse_irq.lock); |
135 | 135 | ||
136 | interrupts_restore(ipl); |
136 | interrupts_restore(ipl); |
137 | } |
137 | } |
138 | 138 | ||
139 | static irq_ownership_t i8042_claim(void) |
139 | static irq_ownership_t i8042_claim(void) |
140 | { |
140 | { |
141 | return IRQ_ACCEPT; |
141 | return IRQ_ACCEPT; |
142 | } |
142 | } |
143 | 143 | ||
144 | static void i8042_kbd_irq_handler(irq_t *irq, void *arg, ...) |
144 | static void i8042_kbd_irq_handler(irq_t *irq, void *arg, ...) |
145 | { |
145 | { |
146 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
146 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
147 | ipc_irq_send_notif(irq); |
147 | ipc_irq_send_notif(irq); |
148 | else { |
148 | else { |
149 | uint8_t x; |
149 | uint8_t x; |
150 | uint8_t status; |
150 | uint8_t status; |
151 | 151 | ||
152 | while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
152 | while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
153 | x = i8042_data_read(); |
153 | x = i8042_data_read(); |
154 | 154 | ||
155 | if ((status & i8042_MOUSE_DATA)) |
155 | if ((status & i8042_MOUSE_DATA)) |
156 | continue; |
156 | continue; |
157 | 157 | ||
158 | if (x & KEY_RELEASE) |
158 | if (x & KEY_RELEASE) |
159 | key_released(x ^ KEY_RELEASE); |
159 | key_released(x ^ KEY_RELEASE); |
160 | else |
160 | else |
161 | key_pressed(x); |
161 | key_pressed(x); |
162 | } |
162 | } |
163 | } |
163 | } |
164 | } |
164 | } |
165 | 165 | ||
166 | static void i8042_mouse_irq_handler(irq_t *irq, void *arg, ...) |
166 | static void i8042_mouse_irq_handler(irq_t *irq, void *arg, ...) |
167 | { |
167 | { |
168 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
168 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
169 | ipc_irq_send_notif(irq); |
169 | ipc_irq_send_notif(irq); |
170 | } |
170 | } |
171 | 171 | ||
172 | /** Initialize i8042. */ |
172 | /** Initialize i8042. */ |
173 | void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr) |
173 | void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr) |
174 | { |
174 | { |
175 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
175 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
176 | stdin = &kbrd; |
176 | stdin = &kbrd; |
177 | 177 | ||
178 | irq_initialize(&i8042_kbd_irq); |
178 | irq_initialize(&i8042_kbd_irq); |
179 | i8042_kbd_irq.devno = kbd_devno; |
179 | i8042_kbd_irq.devno = kbd_devno; |
180 | i8042_kbd_irq.inr = kbd_inr; |
180 | i8042_kbd_irq.inr = kbd_inr; |
181 | i8042_kbd_irq.claim = i8042_claim; |
181 | i8042_kbd_irq.claim = i8042_claim; |
182 | i8042_kbd_irq.handler = i8042_kbd_irq_handler; |
182 | i8042_kbd_irq.handler = i8042_kbd_irq_handler; |
183 | irq_register(&i8042_kbd_irq); |
183 | irq_register(&i8042_kbd_irq); |
184 | 184 | ||
185 | irq_initialize(&i8042_mouse_irq); |
185 | irq_initialize(&i8042_mouse_irq); |
186 | i8042_mouse_irq.devno = mouse_devno; |
186 | i8042_mouse_irq.devno = mouse_devno; |
187 | i8042_mouse_irq.inr = mouse_inr; |
187 | i8042_mouse_irq.inr = mouse_inr; |
188 | i8042_mouse_irq.claim = i8042_claim; |
188 | i8042_mouse_irq.claim = i8042_claim; |
189 | i8042_mouse_irq.handler = i8042_mouse_irq_handler; |
189 | i8042_mouse_irq.handler = i8042_mouse_irq_handler; |
190 | irq_register(&i8042_mouse_irq); |
190 | irq_register(&i8042_mouse_irq); |
191 | 191 | ||
192 | trap_virtual_enable_irqs(1 << kbd_inr); |
192 | trap_virtual_enable_irqs(1 << kbd_inr); |
193 | trap_virtual_enable_irqs(1 << mouse_inr); |
193 | trap_virtual_enable_irqs(1 << mouse_inr); |
194 | 194 | ||
195 | /* |
195 | /* |
196 | * Clear input buffer. |
196 | * Clear input buffer. |
197 | * Number of iterations is limited to prevent infinite looping. |
197 | * Number of iterations is limited to prevent infinite looping. |
198 | */ |
198 | */ |
199 | int i; |
199 | int i; |
200 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
200 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
201 | i8042_data_read(); |
201 | i8042_data_read(); |
202 | } |
202 | } |
203 | 203 | ||
204 | sysinfo_set_item_val("kbd", NULL, true); |
204 | sysinfo_set_item_val("kbd", NULL, true); |
205 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
205 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
206 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
206 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
207 | 207 | ||
208 | sysinfo_set_item_val("mouse", NULL, true); |
208 | sysinfo_set_item_val("mouse", NULL, true); |
209 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
209 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
210 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
210 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
211 | 211 | ||
212 | i8042_grab(); |
212 | i8042_grab(); |
213 | } |
213 | } |
214 | 214 | ||
215 | /* Called from getc(). */ |
215 | /* Called from getc(). */ |
216 | void i8042_resume(chardev_t *d) |
216 | void i8042_resume(chardev_t *d) |
217 | { |
217 | { |
218 | } |
218 | } |
219 | 219 | ||
220 | /* Called from getc(). */ |
220 | /* Called from getc(). */ |
221 | void i8042_suspend(chardev_t *d) |
221 | void i8042_suspend(chardev_t *d) |
222 | { |
222 | { |
223 | } |
223 | } |
224 | 224 | ||
225 | char i8042_key_read(chardev_t *d) |
225 | char i8042_key_read(chardev_t *d) |
226 | { |
226 | { |
227 | char ch; |
227 | char ch; |
228 | 228 | ||
229 | while(!(ch = active_read_buff_read())) { |
229 | while(!(ch = active_read_buff_read())) { |
230 | uint8_t x; |
230 | uint8_t x; |
231 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
231 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
232 | ; |
232 | ; |
233 | x = i8042_data_read(); |
233 | x = i8042_data_read(); |
234 | if (x & KEY_RELEASE) |
234 | if (x & KEY_RELEASE) |
235 | key_released(x ^ KEY_RELEASE); |
235 | key_released(x ^ KEY_RELEASE); |
236 | else |
236 | else |
237 | active_read_key_pressed(x); |
237 | active_read_key_pressed(x); |
238 | } |
238 | } |
239 | return ch; |
239 | return ch; |
240 | } |
240 | } |
241 | 241 | ||
242 | /** Poll for key press and release events. |
242 | /** Poll for key press and release events. |
243 | * |
243 | * |
244 | * This function can be used to implement keyboard polling. |
244 | * This function can be used to implement keyboard polling. |
245 | */ |
245 | */ |
246 | void i8042_poll(void) |
246 | void i8042_poll(void) |
247 | { |
247 | { |
248 | uint8_t x; |
248 | uint8_t x; |
249 | 249 | ||
250 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
250 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
251 | x = i8042_data_read(); |
251 | x = i8042_data_read(); |
252 | if (x & KEY_RELEASE) |
252 | if (x & KEY_RELEASE) |
253 | key_released(x ^ KEY_RELEASE); |
253 | key_released(x ^ KEY_RELEASE); |
254 | else |
254 | else |
255 | key_pressed(x); |
255 | key_pressed(x); |
256 | } |
256 | } |
257 | } |
257 | } |
258 | 258 | ||
259 | /** @} |
259 | /** @} |
260 | */ |
260 | */ |
261 | 261 |