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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 <arch/drivers/kbd.h> |
40 | #include <arch/drivers/kbd.h> |
41 | #include <genarch/kbd/key.h> |
41 | #include <genarch/kbd/key.h> |
42 | #include <genarch/kbd/scanc.h> |
42 | #include <genarch/kbd/scanc.h> |
43 | #include <genarch/kbd/scanc_pc.h> |
43 | #include <genarch/kbd/scanc_pc.h> |
44 | #include <arch/drivers/i8042.h> |
44 | #include <arch/drivers/i8042.h> |
45 | #include <cpu.h> |
45 | #include <cpu.h> |
46 | #include <arch/asm.h> |
46 | #include <arch/asm.h> |
47 | #include <arch.h> |
47 | #include <arch.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 <ipc/irq.h> |
52 | #include <ipc/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 | void i8042_grab(void) |
94 | void i8042_grab(void) |
95 | { |
95 | { |
96 | ipl_t ipl = interrupts_disable(); |
96 | ipl_t ipl = interrupts_disable(); |
97 | 97 | ||
98 | spinlock_lock(&i8042_kbd_irq.lock); |
98 | spinlock_lock(&i8042_kbd_irq.lock); |
99 | i8042_kbd_irq.notif_cfg.notify = false; |
99 | i8042_kbd_irq.notif_cfg.notify = false; |
100 | spinlock_unlock(&i8042_kbd_irq.lock); |
100 | spinlock_unlock(&i8042_kbd_irq.lock); |
101 | 101 | ||
102 | spinlock_lock(&i8042_mouse_irq.lock); |
102 | spinlock_lock(&i8042_mouse_irq.lock); |
103 | i8042_mouse_irq.notif_cfg.notify = false; |
103 | i8042_mouse_irq.notif_cfg.notify = false; |
104 | spinlock_unlock(&i8042_mouse_irq.lock); |
104 | spinlock_unlock(&i8042_mouse_irq.lock); |
105 | 105 | ||
106 | interrupts_restore(ipl); |
106 | interrupts_restore(ipl); |
107 | } |
107 | } |
108 | 108 | ||
109 | void i8042_release(void) |
109 | void i8042_release(void) |
110 | { |
110 | { |
111 | ipl_t ipl = interrupts_disable(); |
111 | ipl_t ipl = interrupts_disable(); |
112 | 112 | ||
113 | spinlock_lock(&i8042_kbd_irq.lock); |
113 | spinlock_lock(&i8042_kbd_irq.lock); |
114 | if (i8042_kbd_irq.notif_cfg.answerbox) |
114 | if (i8042_kbd_irq.notif_cfg.answerbox) |
115 | i8042_kbd_irq.notif_cfg.notify = true; |
115 | i8042_kbd_irq.notif_cfg.notify = true; |
116 | spinlock_unlock(&i8042_kbd_irq.lock); |
116 | spinlock_unlock(&i8042_kbd_irq.lock); |
117 | 117 | ||
118 | spinlock_lock(&i8042_mouse_irq.lock); |
118 | spinlock_lock(&i8042_mouse_irq.lock); |
119 | if (i8042_mouse_irq.notif_cfg.answerbox) |
119 | if (i8042_mouse_irq.notif_cfg.answerbox) |
120 | i8042_mouse_irq.notif_cfg.notify = true; |
120 | i8042_mouse_irq.notif_cfg.notify = true; |
121 | spinlock_unlock(&i8042_mouse_irq.lock); |
121 | spinlock_unlock(&i8042_mouse_irq.lock); |
122 | 122 | ||
123 | interrupts_restore(ipl); |
123 | interrupts_restore(ipl); |
124 | } |
124 | } |
125 | 125 | ||
126 | static irq_ownership_t i8042_claim(void) |
126 | static irq_ownership_t i8042_claim(void *instance) |
127 | { |
127 | { |
128 | return IRQ_ACCEPT; |
128 | return IRQ_ACCEPT; |
129 | } |
129 | } |
130 | 130 | ||
131 | static void i8042_irq_handler(irq_t *irq, void *arg, ...) |
131 | static void i8042_irq_handler(irq_t *irq) |
132 | { |
132 | { |
133 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
133 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
134 | ipc_irq_send_notif(irq); |
134 | ipc_irq_send_notif(irq); |
135 | else { |
135 | else { |
136 | uint8_t data; |
136 | uint8_t data; |
137 | uint8_t status; |
137 | uint8_t status; |
138 | 138 | ||
139 | while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
139 | while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
140 | data = i8042_data_read(); |
140 | data = i8042_data_read(); |
141 | 141 | ||
142 | if ((status & i8042_MOUSE_DATA)) |
142 | if ((status & i8042_MOUSE_DATA)) |
143 | continue; |
143 | continue; |
144 | 144 | ||
145 | if (data & KEY_RELEASE) |
145 | if (data & KEY_RELEASE) |
146 | key_released(data ^ KEY_RELEASE); |
146 | key_released(data ^ KEY_RELEASE); |
147 | else |
147 | else |
148 | key_pressed(data); |
148 | key_pressed(data); |
149 | } |
149 | } |
150 | } |
150 | } |
151 | } |
151 | } |
152 | 152 | ||
153 | /** Initialize i8042. */ |
153 | /** Initialize i8042. */ |
154 | void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr) |
154 | void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr) |
155 | { |
155 | { |
156 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
156 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
157 | stdin = &kbrd; |
157 | stdin = &kbrd; |
158 | 158 | ||
159 | irq_initialize(&i8042_kbd_irq); |
159 | irq_initialize(&i8042_kbd_irq); |
160 | i8042_kbd_irq.devno = kbd_devno; |
160 | i8042_kbd_irq.devno = kbd_devno; |
161 | i8042_kbd_irq.inr = kbd_inr; |
161 | i8042_kbd_irq.inr = kbd_inr; |
162 | i8042_kbd_irq.claim = i8042_claim; |
162 | i8042_kbd_irq.claim = i8042_claim; |
163 | i8042_kbd_irq.handler = i8042_irq_handler; |
163 | i8042_kbd_irq.handler = i8042_irq_handler; |
164 | irq_register(&i8042_kbd_irq); |
164 | irq_register(&i8042_kbd_irq); |
165 | 165 | ||
166 | irq_initialize(&i8042_mouse_irq); |
166 | irq_initialize(&i8042_mouse_irq); |
167 | i8042_mouse_irq.devno = mouse_devno; |
167 | i8042_mouse_irq.devno = mouse_devno; |
168 | i8042_mouse_irq.inr = mouse_inr; |
168 | i8042_mouse_irq.inr = mouse_inr; |
169 | i8042_mouse_irq.claim = i8042_claim; |
169 | i8042_mouse_irq.claim = i8042_claim; |
170 | i8042_mouse_irq.handler = i8042_irq_handler; |
170 | i8042_mouse_irq.handler = i8042_irq_handler; |
171 | irq_register(&i8042_mouse_irq); |
171 | irq_register(&i8042_mouse_irq); |
172 | 172 | ||
173 | trap_virtual_enable_irqs(1 << kbd_inr); |
173 | trap_virtual_enable_irqs(1 << kbd_inr); |
174 | trap_virtual_enable_irqs(1 << mouse_inr); |
174 | trap_virtual_enable_irqs(1 << mouse_inr); |
175 | 175 | ||
176 | /* |
176 | /* |
177 | * Clear input buffer. |
177 | * Clear input buffer. |
178 | * Number of iterations is limited to prevent infinite looping. |
178 | * Number of iterations is limited to prevent infinite looping. |
179 | */ |
179 | */ |
180 | int i; |
180 | int i; |
181 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
181 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
182 | i8042_data_read(); |
182 | i8042_data_read(); |
183 | } |
183 | } |
184 | 184 | ||
185 | sysinfo_set_item_val("kbd", NULL, true); |
185 | sysinfo_set_item_val("kbd", NULL, true); |
186 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
186 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
187 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
187 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
188 | #ifdef KBD_LEGACY |
188 | #ifdef KBD_LEGACY |
189 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
189 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
190 | #endif |
190 | #endif |
191 | sysinfo_set_item_val("mouse", NULL, true); |
191 | sysinfo_set_item_val("mouse", NULL, true); |
192 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
192 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
193 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
193 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
194 | 194 | ||
195 | i8042_grab(); |
195 | i8042_grab(); |
196 | } |
196 | } |
197 | 197 | ||
198 | /* Called from getc(). */ |
198 | /* Called from getc(). */ |
199 | void i8042_resume(chardev_t *d) |
199 | void i8042_resume(chardev_t *d) |
200 | { |
200 | { |
201 | } |
201 | } |
202 | 202 | ||
203 | /* Called from getc(). */ |
203 | /* Called from getc(). */ |
204 | void i8042_suspend(chardev_t *d) |
204 | void i8042_suspend(chardev_t *d) |
205 | { |
205 | { |
206 | } |
206 | } |
207 | 207 | ||
208 | char i8042_key_read(chardev_t *d) |
208 | char i8042_key_read(chardev_t *d) |
209 | { |
209 | { |
210 | char ch; |
210 | char ch; |
211 | 211 | ||
212 | while (!(ch = active_read_buff_read())) { |
212 | while (!(ch = active_read_buff_read())) { |
213 | uint8_t x; |
213 | uint8_t x; |
214 | 214 | ||
215 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)); |
215 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)); |
216 | 216 | ||
217 | x = i8042_data_read(); |
217 | x = i8042_data_read(); |
218 | if (x & KEY_RELEASE) |
218 | if (x & KEY_RELEASE) |
219 | key_released(x ^ KEY_RELEASE); |
219 | key_released(x ^ KEY_RELEASE); |
220 | else |
220 | else |
221 | active_read_key_pressed(x); |
221 | active_read_key_pressed(x); |
222 | } |
222 | } |
223 | return ch; |
223 | return ch; |
224 | } |
224 | } |
225 | 225 | ||
226 | /** Poll for key press and release events. |
226 | /** Poll for key press and release events. |
227 | * |
227 | * |
228 | * This function can be used to implement keyboard polling. |
228 | * This function can be used to implement keyboard polling. |
229 | */ |
229 | */ |
230 | void i8042_poll(void) |
230 | void i8042_poll(void) |
231 | { |
231 | { |
232 | uint8_t x; |
232 | uint8_t x; |
233 | 233 | ||
234 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
234 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
235 | x = i8042_data_read(); |
235 | x = i8042_data_read(); |
236 | if (x & KEY_RELEASE) |
236 | if (x & KEY_RELEASE) |
237 | key_released(x ^ KEY_RELEASE); |
237 | key_released(x ^ KEY_RELEASE); |
238 | else |
238 | else |
239 | key_pressed(x); |
239 | key_pressed(x); |
240 | } |
240 | } |
241 | } |
241 | } |
242 | 242 | ||
243 | /** @} |
243 | /** @} |
244 | */ |
244 | */ |
245 | 245 |