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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 <genarch/drivers/legacy/ia32/io.h> |
44 | #include <genarch/drivers/legacy/ia32/io.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 | i8042_instance_t lgcy_i8042_instance = { |
54 | i8042_instance_t lgcy_i8042_instance = { |
55 | .i8042 = (i8042_t *) I8042_BASE, |
55 | .i8042 = (i8042_t *) I8042_BASE, |
56 | }; |
56 | }; |
57 | 57 | ||
58 | /* Keyboard commands. */ |
58 | /* Keyboard commands. */ |
59 | #define KBD_ENABLE 0xf4 |
59 | #define KBD_ENABLE 0xf4 |
60 | #define KBD_DISABLE 0xf5 |
60 | #define KBD_DISABLE 0xf5 |
61 | #define KBD_ACK 0xfa |
61 | #define KBD_ACK 0xfa |
62 | 62 | ||
63 | /* |
63 | /* |
64 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
64 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
65 | * placed in 8042 command register. Format: |
65 | * placed in 8042 command register. Format: |
66 | * |
66 | * |
67 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
67 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
68 | * | | | | | | | `---- 1=enable output register full interrupt |
68 | * | | | | | | | `---- 1=enable output register full interrupt |
69 | * | | | | | | `----- should be 0 |
69 | * | | | | | | `----- should be 0 |
70 | * | | | | | `------ 1=set status register system, 0=clear |
70 | * | | | | | `------ 1=set status register system, 0=clear |
71 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
71 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
72 | * | | | `-------- disable keyboard I/O by driving clock line low |
72 | * | | | `-------- disable keyboard I/O by driving clock line low |
73 | * | | `--------- disable auxiliary device, drives clock line low |
73 | * | | `--------- disable auxiliary device, drives clock line low |
74 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
74 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
75 | * `----------- reserved, should be 0 |
75 | * `----------- reserved, should be 0 |
76 | */ |
76 | */ |
77 | 77 | ||
78 | #define i8042_SET_COMMAND 0x60 |
78 | #define i8042_SET_COMMAND 0x60 |
79 | #define i8042_COMMAND 0x69 |
79 | #define i8042_COMMAND 0x69 |
80 | 80 | ||
81 | #define i8042_BUFFER_FULL_MASK 0x01 |
81 | #define i8042_BUFFER_FULL_MASK 0x01 |
82 | #define i8042_WAIT_MASK 0x02 |
82 | #define i8042_WAIT_MASK 0x02 |
83 | #define i8042_MOUSE_DATA 0x20 |
83 | #define i8042_MOUSE_DATA 0x20 |
84 | 84 | ||
85 | static void i8042_suspend(chardev_t *); |
85 | static void i8042_suspend(chardev_t *); |
86 | static void i8042_resume(chardev_t *); |
86 | static void i8042_resume(chardev_t *); |
87 | 87 | ||
88 | static chardev_operations_t ops = { |
88 | static chardev_operations_t ops = { |
89 | .suspend = i8042_suspend, |
89 | .suspend = i8042_suspend, |
90 | .resume = i8042_resume, |
90 | .resume = i8042_resume, |
91 | }; |
91 | }; |
92 | 92 | ||
93 | /** Structure for i8042's IRQ. */ |
93 | /** Structure for i8042's IRQ. */ |
94 | static irq_t i8042_kbd_irq; |
94 | static irq_t i8042_kbd_irq; |
95 | static irq_t i8042_mouse_irq; |
95 | static irq_t i8042_mouse_irq; |
96 | 96 | ||
97 | void i8042_grab(void) |
97 | void i8042_grab(void) |
98 | { |
98 | { |
99 | ipl_t ipl = interrupts_disable(); |
99 | ipl_t ipl = interrupts_disable(); |
100 | 100 | ||
101 | spinlock_lock(&i8042_kbd_irq.lock); |
101 | spinlock_lock(&i8042_kbd_irq.lock); |
102 | i8042_kbd_irq.notif_cfg.notify = false; |
102 | i8042_kbd_irq.notif_cfg.notify = false; |
103 | spinlock_unlock(&i8042_kbd_irq.lock); |
103 | spinlock_unlock(&i8042_kbd_irq.lock); |
104 | 104 | ||
105 | spinlock_lock(&i8042_mouse_irq.lock); |
105 | spinlock_lock(&i8042_mouse_irq.lock); |
106 | i8042_mouse_irq.notif_cfg.notify = false; |
106 | i8042_mouse_irq.notif_cfg.notify = false; |
107 | spinlock_unlock(&i8042_mouse_irq.lock); |
107 | spinlock_unlock(&i8042_mouse_irq.lock); |
108 | 108 | ||
109 | interrupts_restore(ipl); |
109 | interrupts_restore(ipl); |
110 | } |
110 | } |
111 | 111 | ||
112 | void i8042_release(void) |
112 | void i8042_release(void) |
113 | { |
113 | { |
114 | ipl_t ipl = interrupts_disable(); |
114 | ipl_t ipl = interrupts_disable(); |
115 | 115 | ||
116 | spinlock_lock(&i8042_kbd_irq.lock); |
116 | spinlock_lock(&i8042_kbd_irq.lock); |
117 | if (i8042_kbd_irq.notif_cfg.answerbox) |
117 | if (i8042_kbd_irq.notif_cfg.answerbox) |
118 | i8042_kbd_irq.notif_cfg.notify = true; |
118 | i8042_kbd_irq.notif_cfg.notify = true; |
119 | spinlock_unlock(&i8042_kbd_irq.lock); |
119 | spinlock_unlock(&i8042_kbd_irq.lock); |
120 | 120 | ||
121 | spinlock_lock(&i8042_mouse_irq.lock); |
121 | spinlock_lock(&i8042_mouse_irq.lock); |
122 | if (i8042_mouse_irq.notif_cfg.answerbox) |
122 | if (i8042_mouse_irq.notif_cfg.answerbox) |
123 | i8042_mouse_irq.notif_cfg.notify = true; |
123 | i8042_mouse_irq.notif_cfg.notify = true; |
124 | spinlock_unlock(&i8042_mouse_irq.lock); |
124 | spinlock_unlock(&i8042_mouse_irq.lock); |
125 | 125 | ||
126 | interrupts_restore(ipl); |
126 | interrupts_restore(ipl); |
127 | } |
127 | } |
128 | 128 | ||
129 | static irq_ownership_t i8042_claim(void *instance) |
129 | static irq_ownership_t i8042_claim(irq_t *irq) |
130 | { |
130 | { |
131 | i8042_instance_t *i8042_instance = instance; |
131 | i8042_instance_t *i8042_instance = irq->instance; |
132 | i8042_t *dev = i8042_instance->i8042; |
132 | i8042_t *dev = i8042_instance->i8042; |
133 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
133 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
134 | return IRQ_ACCEPT; |
134 | return IRQ_ACCEPT; |
135 | else |
135 | else |
136 | return IRQ_DECLINE; |
136 | return IRQ_DECLINE; |
137 | } |
137 | } |
138 | 138 | ||
139 | static void i8042_irq_handler(irq_t *irq) |
139 | static void i8042_irq_handler(irq_t *irq) |
140 | { |
140 | { |
141 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) { |
141 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) { |
142 | /* |
142 | /* |
143 | * This will hopefully go to the IRQ dispatcher code soon. |
143 | * This will hopefully go to the IRQ dispatcher code soon. |
144 | */ |
144 | */ |
145 | ipc_irq_send_notif(irq); |
145 | ipc_irq_send_notif(irq); |
146 | return; |
146 | return; |
147 | } |
147 | } |
148 | 148 | ||
149 | i8042_instance_t *instance = irq->instance; |
149 | i8042_instance_t *instance = irq->instance; |
150 | i8042_t *dev = instance->i8042; |
150 | i8042_t *dev = instance->i8042; |
151 | 151 | ||
152 | uint8_t data; |
152 | uint8_t data; |
153 | uint8_t status; |
153 | uint8_t status; |
154 | 154 | ||
155 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
155 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
156 | data = pio_read_8(&dev->data); |
156 | data = pio_read_8(&dev->data); |
157 | 157 | ||
158 | if ((status & i8042_MOUSE_DATA)) |
158 | if ((status & i8042_MOUSE_DATA)) |
159 | return; |
159 | return; |
160 | 160 | ||
161 | if (data & KEY_RELEASE) |
161 | if (data & KEY_RELEASE) |
162 | key_released(data ^ KEY_RELEASE); |
162 | key_released(data ^ KEY_RELEASE); |
163 | else |
163 | else |
164 | key_pressed(data); |
164 | key_pressed(data); |
165 | } |
165 | } |
166 | } |
166 | } |
167 | 167 | ||
168 | /** Initialize i8042. */ |
168 | /** Initialize i8042. */ |
169 | void |
169 | void |
170 | i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, |
170 | i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, |
171 | inr_t mouse_inr) |
171 | inr_t mouse_inr) |
172 | { |
172 | { |
173 | i8042_t *dev = lgcy_i8042_instance.i8042; |
173 | i8042_t *dev = lgcy_i8042_instance.i8042; |
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_irq_handler; |
182 | i8042_kbd_irq.handler = i8042_irq_handler; |
183 | i8042_kbd_irq.instance = &lgcy_i8042_instance; |
183 | i8042_kbd_irq.instance = &lgcy_i8042_instance; |
184 | irq_register(&i8042_kbd_irq); |
184 | irq_register(&i8042_kbd_irq); |
185 | 185 | ||
186 | irq_initialize(&i8042_mouse_irq); |
186 | irq_initialize(&i8042_mouse_irq); |
187 | i8042_mouse_irq.devno = mouse_devno; |
187 | i8042_mouse_irq.devno = mouse_devno; |
188 | i8042_mouse_irq.inr = mouse_inr; |
188 | i8042_mouse_irq.inr = mouse_inr; |
189 | i8042_mouse_irq.claim = i8042_claim; |
189 | i8042_mouse_irq.claim = i8042_claim; |
190 | i8042_mouse_irq.handler = i8042_irq_handler; |
190 | i8042_mouse_irq.handler = i8042_irq_handler; |
191 | i8042_mouse_irq.instance = &lgcy_i8042_instance; |
191 | i8042_mouse_irq.instance = &lgcy_i8042_instance; |
192 | irq_register(&i8042_mouse_irq); |
192 | irq_register(&i8042_mouse_irq); |
193 | 193 | ||
194 | trap_virtual_enable_irqs(1 << kbd_inr); |
194 | trap_virtual_enable_irqs(1 << kbd_inr); |
195 | trap_virtual_enable_irqs(1 << mouse_inr); |
195 | trap_virtual_enable_irqs(1 << mouse_inr); |
196 | 196 | ||
197 | /* |
197 | /* |
198 | * Clear input buffer. |
198 | * Clear input buffer. |
199 | * Number of iterations is limited to prevent infinite looping. |
199 | * Number of iterations is limited to prevent infinite looping. |
200 | */ |
200 | */ |
201 | int i; |
201 | int i; |
202 | for (i = 0; (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) && |
202 | for (i = 0; (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) && |
203 | i < 100; i++) { |
203 | i < 100; i++) { |
204 | (void) pio_read_8(&dev->data); |
204 | (void) pio_read_8(&dev->data); |
205 | } |
205 | } |
206 | 206 | ||
207 | sysinfo_set_item_val("kbd", NULL, true); |
207 | sysinfo_set_item_val("kbd", NULL, true); |
208 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
208 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
209 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
209 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
210 | #ifdef KBD_LEGACY |
210 | #ifdef KBD_LEGACY |
211 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
211 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
212 | #endif |
212 | #endif |
213 | sysinfo_set_item_val("mouse", NULL, true); |
213 | sysinfo_set_item_val("mouse", NULL, true); |
214 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
214 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
215 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
215 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
216 | 216 | ||
217 | i8042_grab(); |
217 | i8042_grab(); |
218 | } |
218 | } |
219 | 219 | ||
220 | /* Called from getc(). */ |
220 | /* Called from getc(). */ |
221 | void i8042_resume(chardev_t *d) |
221 | void i8042_resume(chardev_t *d) |
222 | { |
222 | { |
223 | } |
223 | } |
224 | 224 | ||
225 | /* Called from getc(). */ |
225 | /* Called from getc(). */ |
226 | void i8042_suspend(chardev_t *d) |
226 | void i8042_suspend(chardev_t *d) |
227 | { |
227 | { |
228 | } |
228 | } |
229 | 229 | ||
230 | /** @} |
230 | /** @} |
231 | */ |
231 | */ |
232 | 232 |