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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 <console/chardev.h> |
47 | #include <console/chardev.h> |
48 | #include <console/console.h> |
48 | #include <console/console.h> |
49 | #include <interrupt.h> |
49 | #include <interrupt.h> |
50 | #include <sysinfo/sysinfo.h> |
50 | #include <sysinfo/sysinfo.h> |
51 | #include <ipc/irq.h> |
51 | #include <ipc/irq.h> |
52 | #include <generic/synch/rcu.h> |
52 | #include <synch/rcu.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 | //rcu_read_lock() is not needed, ints are disabled |
111 | //rcu_read_lock() is not needed, ints are disabled |
112 | //rcu: atomic update doesn't need reallocation |
112 | //rcu: atomic update doesn't need reallocation |
113 | rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = false; |
113 | rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = false; |
114 | 114 | ||
115 | rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).notify = false; |
115 | rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).notify = false; |
116 | 116 | ||
117 | interrupts_restore(ipl); |
117 | interrupts_restore(ipl); |
118 | } |
118 | } |
119 | 119 | ||
120 | void i8042_release(void) |
120 | void i8042_release(void) |
121 | { |
121 | { |
122 | ipl_t ipl = interrupts_disable(); |
122 | ipl_t ipl = interrupts_disable(); |
123 | //rcu: atomic update doesn't need reallocation |
123 | //rcu: atomic update doesn't need reallocation |
124 | spinlock_lock(&i8042_kbd_irq.lock); |
124 | spinlock_lock(&i8042_kbd_irq.lock); |
125 | if (rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).answerbox) |
125 | if (rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).answerbox) |
126 | rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = true; |
126 | rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = true; |
127 | spinlock_unlock(&i8042_kbd_irq.lock); |
127 | spinlock_unlock(&i8042_kbd_irq.lock); |
128 | 128 | ||
129 | spinlock_lock(&i8042_mouse_irq.lock); |
129 | spinlock_lock(&i8042_mouse_irq.lock); |
130 | if (rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).answerbox) |
130 | if (rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).answerbox) |
131 | rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).notify = true; |
131 | rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).notify = true; |
132 | spinlock_unlock(&i8042_mouse_irq.lock); |
132 | spinlock_unlock(&i8042_mouse_irq.lock); |
133 | 133 | ||
134 | interrupts_restore(ipl); |
134 | interrupts_restore(ipl); |
135 | } |
135 | } |
136 | 136 | ||
137 | static irq_ownership_t i8042_claim(void) |
137 | static irq_ownership_t i8042_claim(void) |
138 | { |
138 | { |
139 | return IRQ_ACCEPT; |
139 | return IRQ_ACCEPT; |
140 | } |
140 | } |
141 | 141 | ||
142 | static void i8042_kbd_irq_handler(irq_t *irq, void *arg, ...) |
142 | static void i8042_kbd_irq_handler(irq_t *irq, void *arg, ...) |
143 | { |
143 | { |
144 | if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox) |
144 | if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox) |
145 | ipc_irq_send_notif(irq); |
145 | ipc_irq_send_notif(irq); |
146 | else { |
146 | else { |
147 | uint8_t x; |
147 | uint8_t x; |
148 | uint8_t status; |
148 | uint8_t status; |
149 | 149 | ||
150 | while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
150 | while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
151 | x = i8042_data_read(); |
151 | x = i8042_data_read(); |
152 | 152 | ||
153 | if ((status & i8042_MOUSE_DATA)) |
153 | if ((status & i8042_MOUSE_DATA)) |
154 | continue; |
154 | continue; |
155 | 155 | ||
156 | if (x & KEY_RELEASE) |
156 | if (x & KEY_RELEASE) |
157 | key_released(x ^ KEY_RELEASE); |
157 | key_released(x ^ KEY_RELEASE); |
158 | else |
158 | else |
159 | key_pressed(x); |
159 | key_pressed(x); |
160 | } |
160 | } |
161 | } |
161 | } |
162 | } |
162 | } |
163 | 163 | ||
164 | static void i8042_mouse_irq_handler(irq_t *irq, void *arg, ...) |
164 | static void i8042_mouse_irq_handler(irq_t *irq, void *arg, ...) |
165 | { |
165 | { |
166 | if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox) |
166 | if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox) |
167 | ipc_irq_send_notif(irq); |
167 | ipc_irq_send_notif(irq); |
168 | } |
168 | } |
169 | 169 | ||
170 | /** Initialize i8042. */ |
170 | /** Initialize i8042. */ |
171 | void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr) |
171 | void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr) |
172 | { |
172 | { |
173 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
173 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
174 | stdin = &kbrd; |
174 | stdin = &kbrd; |
175 | 175 | ||
176 | irq_initialize(&i8042_kbd_irq); |
176 | irq_initialize(&i8042_kbd_irq); |
177 | i8042_kbd_irq.devno = kbd_devno; |
177 | i8042_kbd_irq.devno = kbd_devno; |
178 | i8042_kbd_irq.inr = kbd_inr; |
178 | i8042_kbd_irq.inr = kbd_inr; |
179 | i8042_kbd_irq.claim = i8042_claim; |
179 | i8042_kbd_irq.claim = i8042_claim; |
180 | i8042_kbd_irq.handler = i8042_kbd_irq_handler; |
180 | i8042_kbd_irq.handler = i8042_kbd_irq_handler; |
181 | irq_register(&i8042_kbd_irq); |
181 | irq_register(&i8042_kbd_irq); |
182 | 182 | ||
183 | irq_initialize(&i8042_mouse_irq); |
183 | irq_initialize(&i8042_mouse_irq); |
184 | i8042_mouse_irq.devno = mouse_devno; |
184 | i8042_mouse_irq.devno = mouse_devno; |
185 | i8042_mouse_irq.inr = mouse_inr; |
185 | i8042_mouse_irq.inr = mouse_inr; |
186 | i8042_mouse_irq.claim = i8042_claim; |
186 | i8042_mouse_irq.claim = i8042_claim; |
187 | i8042_mouse_irq.handler = i8042_mouse_irq_handler; |
187 | i8042_mouse_irq.handler = i8042_mouse_irq_handler; |
188 | irq_register(&i8042_mouse_irq); |
188 | irq_register(&i8042_mouse_irq); |
189 | 189 | ||
190 | trap_virtual_enable_irqs(1 << kbd_inr); |
190 | trap_virtual_enable_irqs(1 << kbd_inr); |
191 | trap_virtual_enable_irqs(1 << mouse_inr); |
191 | trap_virtual_enable_irqs(1 << mouse_inr); |
192 | 192 | ||
193 | /* |
193 | /* |
194 | * Clear input buffer. |
194 | * Clear input buffer. |
195 | * Number of iterations is limited to prevent infinite looping. |
195 | * Number of iterations is limited to prevent infinite looping. |
196 | */ |
196 | */ |
197 | int i; |
197 | int i; |
198 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
198 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
199 | i8042_data_read(); |
199 | i8042_data_read(); |
200 | } |
200 | } |
201 | 201 | ||
202 | sysinfo_set_item_val("kbd", NULL, true); |
202 | sysinfo_set_item_val("kbd", NULL, true); |
203 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
203 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
204 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
204 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
205 | 205 | ||
206 | sysinfo_set_item_val("mouse", NULL, true); |
206 | sysinfo_set_item_val("mouse", NULL, true); |
207 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
207 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
208 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
208 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
209 | 209 | ||
210 | i8042_grab(); |
210 | i8042_grab(); |
211 | } |
211 | } |
212 | 212 | ||
213 | /* Called from getc(). */ |
213 | /* Called from getc(). */ |
214 | void i8042_resume(chardev_t *d) |
214 | void i8042_resume(chardev_t *d) |
215 | { |
215 | { |
216 | } |
216 | } |
217 | 217 | ||
218 | /* Called from getc(). */ |
218 | /* Called from getc(). */ |
219 | void i8042_suspend(chardev_t *d) |
219 | void i8042_suspend(chardev_t *d) |
220 | { |
220 | { |
221 | } |
221 | } |
222 | 222 | ||
223 | char i8042_key_read(chardev_t *d) |
223 | char i8042_key_read(chardev_t *d) |
224 | { |
224 | { |
225 | char ch; |
225 | char ch; |
226 | 226 | ||
227 | while(!(ch = active_read_buff_read())) { |
227 | while(!(ch = active_read_buff_read())) { |
228 | uint8_t x; |
228 | uint8_t x; |
229 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
229 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
230 | ; |
230 | ; |
231 | x = i8042_data_read(); |
231 | x = i8042_data_read(); |
232 | if (x & KEY_RELEASE) |
232 | if (x & KEY_RELEASE) |
233 | key_released(x ^ KEY_RELEASE); |
233 | key_released(x ^ KEY_RELEASE); |
234 | else |
234 | else |
235 | active_read_key_pressed(x); |
235 | active_read_key_pressed(x); |
236 | } |
236 | } |
237 | return ch; |
237 | return ch; |
238 | } |
238 | } |
239 | 239 | ||
240 | /** Poll for key press and release events. |
240 | /** Poll for key press and release events. |
241 | * |
241 | * |
242 | * This function can be used to implement keyboard polling. |
242 | * This function can be used to implement keyboard polling. |
243 | */ |
243 | */ |
244 | void i8042_poll(void) |
244 | void i8042_poll(void) |
245 | { |
245 | { |
246 | uint8_t x; |
246 | uint8_t x; |
247 | 247 | ||
248 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
248 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
249 | x = i8042_data_read(); |
249 | x = i8042_data_read(); |
250 | if (x & KEY_RELEASE) |
250 | if (x & KEY_RELEASE) |
251 | key_released(x ^ KEY_RELEASE); |
251 | key_released(x ^ KEY_RELEASE); |
252 | else |
252 | else |
253 | key_pressed(x); |
253 | key_pressed(x); |
254 | } |
254 | } |
255 | } |
255 | } |
256 | 256 | ||
257 | /** @} |
257 | /** @} |
258 | */ |
258 | */ |
259 | 259 |