Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2001-2004 Jakub Jermar |
1 | jermar | 3 | * All rights reserved. |
4 | * |
||
5 | * Redistribution and use in source and binary forms, with or without |
||
6 | * modification, are permitted provided that the following conditions |
||
7 | * are met: |
||
8 | * |
||
9 | * - Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * - Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
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 |
||
15 | * derived from this software without specific prior written permission. |
||
16 | * |
||
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 |
||
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
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 |
||
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 |
||
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
27 | */ |
||
28 | |||
1754 | jermar | 29 | /** @addtogroup genarch |
1702 | cejka | 30 | * @{ |
31 | */ |
||
1754 | jermar | 32 | /** |
1757 | jermar | 33 | * @file |
1754 | jermar | 34 | * @brief i8042 processor driver. |
35 | * |
||
36 | * It takes care of low-level keyboard functions. |
||
1702 | cejka | 37 | */ |
38 | |||
1842 | jermar | 39 | #include <genarch/kbd/i8042.h> |
3661 | vana | 40 | #include <arch/drivers/kbd.h> |
1843 | jermar | 41 | #include <genarch/kbd/key.h> |
1842 | jermar | 42 | #include <genarch/kbd/scanc.h> |
43 | #include <genarch/kbd/scanc_pc.h> |
||
1 | jermar | 44 | #include <cpu.h> |
45 | #include <arch/asm.h> |
||
46 | #include <arch.h> |
||
511 | jermar | 47 | #include <console/chardev.h> |
48 | #include <console/console.h> |
||
576 | palkovsky | 49 | #include <interrupt.h> |
1956 | decky | 50 | #include <sysinfo/sysinfo.h> |
2089 | decky | 51 | #include <ipc/irq.h> |
1 | jermar | 52 | |
3928 | jermar | 53 | #define i8042_DATA 0x60 |
54 | #define i8042_STATUS 0x64 |
||
55 | |||
1754 | jermar | 56 | /* Keyboard commands. */ |
512 | jermar | 57 | #define KBD_ENABLE 0xf4 |
58 | #define KBD_DISABLE 0xf5 |
||
59 | #define KBD_ACK 0xfa |
||
60 | |||
670 | vana | 61 | /* |
893 | jermar | 62 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
895 | jermar | 63 | * placed in 8042 command register. Format: |
893 | jermar | 64 | * |
65 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
||
66 | * | | | | | | | `---- 1=enable output register full interrupt |
||
67 | * | | | | | | `----- should be 0 |
||
68 | * | | | | | `------ 1=set status register system, 0=clear |
||
69 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
||
70 | * | | | `-------- disable keyboard I/O by driving clock line low |
||
71 | * | | `--------- disable auxiliary device, drives clock line low |
||
72 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
||
73 | * `----------- reserved, should be 0 |
||
74 | */ |
||
670 | vana | 75 | |
893 | jermar | 76 | #define i8042_SET_COMMAND 0x60 |
1759 | palkovsky | 77 | #define i8042_COMMAND 0x69 |
894 | jermar | 78 | |
79 | #define i8042_BUFFER_FULL_MASK 0x01 |
||
2321 | decky | 80 | #define i8042_WAIT_MASK 0x02 |
81 | #define i8042_MOUSE_DATA 0x20 |
||
670 | vana | 82 | |
575 | palkovsky | 83 | static void i8042_suspend(chardev_t *); |
84 | static void i8042_resume(chardev_t *); |
||
511 | jermar | 85 | |
86 | static chardev_operations_t ops = { |
||
87 | .suspend = i8042_suspend, |
||
878 | vana | 88 | .resume = i8042_resume, |
1896 | jermar | 89 | .read = i8042_key_read |
511 | jermar | 90 | }; |
91 | |||
1956 | decky | 92 | /** Structure for i8042's IRQ. */ |
1957 | decky | 93 | static irq_t i8042_kbd_irq; |
94 | static irq_t i8042_mouse_irq; |
||
576 | palkovsky | 95 | |
1474 | palkovsky | 96 | void i8042_grab(void) |
1 | jermar | 97 | { |
1956 | decky | 98 | ipl_t ipl = interrupts_disable(); |
99 | |||
1957 | decky | 100 | spinlock_lock(&i8042_kbd_irq.lock); |
101 | i8042_kbd_irq.notif_cfg.notify = false; |
||
102 | spinlock_unlock(&i8042_kbd_irq.lock); |
||
103 | |||
104 | spinlock_lock(&i8042_mouse_irq.lock); |
||
105 | i8042_mouse_irq.notif_cfg.notify = false; |
||
106 | spinlock_unlock(&i8042_mouse_irq.lock); |
||
107 | |||
1956 | decky | 108 | interrupts_restore(ipl); |
1474 | palkovsky | 109 | } |
1956 | decky | 110 | |
1474 | palkovsky | 111 | void i8042_release(void) |
112 | { |
||
1956 | decky | 113 | ipl_t ipl = interrupts_disable(); |
1957 | decky | 114 | |
115 | spinlock_lock(&i8042_kbd_irq.lock); |
||
116 | if (i8042_kbd_irq.notif_cfg.answerbox) |
||
117 | i8042_kbd_irq.notif_cfg.notify = true; |
||
118 | spinlock_unlock(&i8042_kbd_irq.lock); |
||
119 | |||
120 | spinlock_lock(&i8042_mouse_irq.lock); |
||
121 | if (i8042_mouse_irq.notif_cfg.answerbox) |
||
122 | i8042_mouse_irq.notif_cfg.notify = true; |
||
123 | spinlock_unlock(&i8042_mouse_irq.lock); |
||
124 | |||
1956 | decky | 125 | interrupts_restore(ipl); |
1474 | palkovsky | 126 | } |
670 | vana | 127 | |
3906 | jermar | 128 | static irq_ownership_t i8042_claim(void *instance) |
1474 | palkovsky | 129 | { |
1956 | decky | 130 | return IRQ_ACCEPT; |
131 | } |
||
1474 | palkovsky | 132 | |
3906 | jermar | 133 | static void i8042_irq_handler(irq_t *irq) |
1956 | decky | 134 | { |
135 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
||
136 | ipc_irq_send_notif(irq); |
||
137 | else { |
||
2321 | decky | 138 | uint8_t data; |
1956 | decky | 139 | uint8_t status; |
140 | |||
3928 | jermar | 141 | while (((status = pio_read_8(i8042_STATUS)) & |
142 | i8042_BUFFER_FULL_MASK)) { |
||
143 | data = pio_read_8(i8042_DATA); |
||
1956 | decky | 144 | |
145 | if ((status & i8042_MOUSE_DATA)) |
||
146 | continue; |
||
2321 | decky | 147 | |
148 | if (data & KEY_RELEASE) |
||
149 | key_released(data ^ KEY_RELEASE); |
||
1956 | decky | 150 | else |
2321 | decky | 151 | key_pressed(data); |
1956 | decky | 152 | } |
153 | } |
||
154 | } |
||
1474 | palkovsky | 155 | |
1956 | decky | 156 | /** Initialize i8042. */ |
3928 | jermar | 157 | void |
158 | i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, |
||
159 | inr_t mouse_inr) |
||
1956 | decky | 160 | { |
575 | palkovsky | 161 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
511 | jermar | 162 | stdin = &kbrd; |
1956 | decky | 163 | |
1957 | decky | 164 | irq_initialize(&i8042_kbd_irq); |
165 | i8042_kbd_irq.devno = kbd_devno; |
||
166 | i8042_kbd_irq.inr = kbd_inr; |
||
167 | i8042_kbd_irq.claim = i8042_claim; |
||
2321 | decky | 168 | i8042_kbd_irq.handler = i8042_irq_handler; |
1957 | decky | 169 | irq_register(&i8042_kbd_irq); |
1956 | decky | 170 | |
1957 | decky | 171 | irq_initialize(&i8042_mouse_irq); |
172 | i8042_mouse_irq.devno = mouse_devno; |
||
173 | i8042_mouse_irq.inr = mouse_inr; |
||
174 | i8042_mouse_irq.claim = i8042_claim; |
||
2321 | decky | 175 | i8042_mouse_irq.handler = i8042_irq_handler; |
1957 | decky | 176 | irq_register(&i8042_mouse_irq); |
3877 | decky | 177 | |
1957 | decky | 178 | trap_virtual_enable_irqs(1 << kbd_inr); |
179 | trap_virtual_enable_irqs(1 << mouse_inr); |
||
3877 | decky | 180 | |
1194 | vana | 181 | /* |
1195 | jermar | 182 | * Clear input buffer. |
183 | * Number of iterations is limited to prevent infinite looping. |
||
184 | */ |
||
1956 | decky | 185 | int i; |
3928 | jermar | 186 | for (i = 0; (pio_read_8(i8042_STATUS) & i8042_BUFFER_FULL_MASK) && |
187 | i < 100; i++) { |
||
188 | (void) pio_read_8(i8042_DATA); |
||
1753 | palkovsky | 189 | } |
1956 | decky | 190 | |
191 | sysinfo_set_item_val("kbd", NULL, true); |
||
1957 | decky | 192 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
193 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
||
3661 | vana | 194 | #ifdef KBD_LEGACY |
195 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
||
3877 | decky | 196 | #endif |
1957 | decky | 197 | sysinfo_set_item_val("mouse", NULL, true); |
198 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
||
199 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
||
200 | |||
1956 | decky | 201 | i8042_grab(); |
1 | jermar | 202 | } |
508 | jermar | 203 | |
511 | jermar | 204 | /* Called from getc(). */ |
575 | palkovsky | 205 | void i8042_resume(chardev_t *d) |
511 | jermar | 206 | { |
207 | } |
||
208 | |||
209 | /* Called from getc(). */ |
||
575 | palkovsky | 210 | void i8042_suspend(chardev_t *d) |
511 | jermar | 211 | { |
212 | } |
||
878 | vana | 213 | |
1896 | jermar | 214 | char i8042_key_read(chardev_t *d) |
878 | vana | 215 | { |
3877 | decky | 216 | char ch; |
217 | |||
218 | while (!(ch = active_read_buff_read())) { |
||
1780 | jermar | 219 | uint8_t x; |
3877 | decky | 220 | |
3928 | jermar | 221 | while (!(pio_read_8(i8042_STATUS) & i8042_BUFFER_FULL_MASK)) |
222 | ; |
||
3877 | decky | 223 | |
3928 | jermar | 224 | x = pio_read_8(i8042_STATUS); |
1842 | jermar | 225 | if (x & KEY_RELEASE) |
226 | key_released(x ^ KEY_RELEASE); |
||
227 | else |
||
228 | active_read_key_pressed(x); |
||
878 | vana | 229 | } |
230 | return ch; |
||
231 | } |
||
895 | jermar | 232 | |
1754 | jermar | 233 | /** @} |
1702 | cejka | 234 | */ |