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1 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2001-2004 Jakub Jermar |
1 | jermar | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
1754 | jermar | 29 | /** @addtogroup genarch |
1702 | cejka | 30 | * @{ |
31 | */ |
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1754 | jermar | 32 | /** |
1757 | jermar | 33 | * @file |
1754 | jermar | 34 | * @brief i8042 processor driver. |
35 | * |
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36 | * It takes care of low-level keyboard functions. |
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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> |
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3932 | jermar | 44 | #include <genarch/drivers/legacy/ia32/io.h> |
1 | jermar | 45 | #include <cpu.h> |
46 | #include <arch/asm.h> |
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47 | #include <arch.h> |
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511 | jermar | 48 | #include <console/chardev.h> |
49 | #include <console/console.h> |
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576 | palkovsky | 50 | #include <interrupt.h> |
1956 | decky | 51 | #include <sysinfo/sysinfo.h> |
1 | jermar | 52 | |
3931 | jermar | 53 | i8042_instance_t lgcy_i8042_instance = { |
3934 | jermar | 54 | .i8042 = (i8042_t *) I8042_BASE, |
3931 | jermar | 55 | }; |
3928 | jermar | 56 | |
1754 | jermar | 57 | /* Keyboard commands. */ |
512 | jermar | 58 | #define KBD_ENABLE 0xf4 |
59 | #define KBD_DISABLE 0xf5 |
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60 | #define KBD_ACK 0xfa |
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61 | |||
670 | vana | 62 | /* |
893 | jermar | 63 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
895 | jermar | 64 | * placed in 8042 command register. Format: |
893 | jermar | 65 | * |
66 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
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67 | * | | | | | | | `---- 1=enable output register full interrupt |
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68 | * | | | | | | `----- should be 0 |
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69 | * | | | | | `------ 1=set status register system, 0=clear |
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70 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
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71 | * | | | `-------- disable keyboard I/O by driving clock line low |
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72 | * | | `--------- disable auxiliary device, drives clock line low |
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73 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
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74 | * `----------- reserved, should be 0 |
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75 | */ |
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670 | vana | 76 | |
893 | jermar | 77 | #define i8042_SET_COMMAND 0x60 |
1759 | palkovsky | 78 | #define i8042_COMMAND 0x69 |
894 | jermar | 79 | |
80 | #define i8042_BUFFER_FULL_MASK 0x01 |
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2321 | decky | 81 | #define i8042_WAIT_MASK 0x02 |
82 | #define i8042_MOUSE_DATA 0x20 |
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670 | vana | 83 | |
575 | palkovsky | 84 | static void i8042_suspend(chardev_t *); |
85 | static void i8042_resume(chardev_t *); |
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511 | jermar | 86 | |
87 | static chardev_operations_t ops = { |
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88 | .suspend = i8042_suspend, |
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878 | vana | 89 | .resume = i8042_resume, |
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; |
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576 | palkovsky | 95 | |
3941 | jermar | 96 | static irq_ownership_t i8042_claim(irq_t *irq) |
1474 | palkovsky | 97 | { |
3941 | jermar | 98 | i8042_instance_t *i8042_instance = irq->instance; |
3931 | jermar | 99 | i8042_t *dev = i8042_instance->i8042; |
100 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
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101 | return IRQ_ACCEPT; |
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102 | else |
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103 | return IRQ_DECLINE; |
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1956 | decky | 104 | } |
1474 | palkovsky | 105 | |
3906 | jermar | 106 | static void i8042_irq_handler(irq_t *irq) |
1956 | decky | 107 | { |
3931 | jermar | 108 | i8042_instance_t *instance = irq->instance; |
109 | i8042_t *dev = instance->i8042; |
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110 | |||
111 | uint8_t data; |
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112 | uint8_t status; |
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1956 | decky | 113 | |
3931 | jermar | 114 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
115 | data = pio_read_8(&dev->data); |
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1956 | decky | 116 | |
3931 | jermar | 117 | if ((status & i8042_MOUSE_DATA)) |
118 | return; |
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2321 | decky | 119 | |
3931 | jermar | 120 | if (data & KEY_RELEASE) |
121 | key_released(data ^ KEY_RELEASE); |
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122 | else |
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123 | key_pressed(data); |
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1956 | decky | 124 | } |
125 | } |
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1474 | palkovsky | 126 | |
1956 | decky | 127 | /** Initialize i8042. */ |
3928 | jermar | 128 | void |
129 | i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, |
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130 | inr_t mouse_inr) |
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1956 | decky | 131 | { |
3931 | jermar | 132 | i8042_t *dev = lgcy_i8042_instance.i8042; |
133 | |||
575 | palkovsky | 134 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
511 | jermar | 135 | stdin = &kbrd; |
1956 | decky | 136 | |
1957 | decky | 137 | irq_initialize(&i8042_kbd_irq); |
138 | i8042_kbd_irq.devno = kbd_devno; |
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139 | i8042_kbd_irq.inr = kbd_inr; |
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140 | i8042_kbd_irq.claim = i8042_claim; |
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2321 | decky | 141 | i8042_kbd_irq.handler = i8042_irq_handler; |
3931 | jermar | 142 | i8042_kbd_irq.instance = &lgcy_i8042_instance; |
1957 | decky | 143 | irq_register(&i8042_kbd_irq); |
1956 | decky | 144 | |
1957 | decky | 145 | irq_initialize(&i8042_mouse_irq); |
146 | i8042_mouse_irq.devno = mouse_devno; |
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147 | i8042_mouse_irq.inr = mouse_inr; |
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148 | i8042_mouse_irq.claim = i8042_claim; |
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2321 | decky | 149 | i8042_mouse_irq.handler = i8042_irq_handler; |
3931 | jermar | 150 | i8042_mouse_irq.instance = &lgcy_i8042_instance; |
1957 | decky | 151 | irq_register(&i8042_mouse_irq); |
3877 | decky | 152 | |
1957 | decky | 153 | trap_virtual_enable_irqs(1 << kbd_inr); |
154 | trap_virtual_enable_irqs(1 << mouse_inr); |
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3877 | decky | 155 | |
1194 | vana | 156 | /* |
1195 | jermar | 157 | * Clear input buffer. |
158 | */ |
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3958 | jermar | 159 | while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
3931 | jermar | 160 | (void) pio_read_8(&dev->data); |
1956 | decky | 161 | |
3958 | jermar | 162 | /* |
163 | * This is the necessary evil until the userspace driver is entirely |
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164 | * self-sufficient. |
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165 | */ |
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1956 | decky | 166 | sysinfo_set_item_val("kbd", NULL, true); |
1957 | decky | 167 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
168 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
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3661 | vana | 169 | #ifdef KBD_LEGACY |
170 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
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3877 | decky | 171 | #endif |
1957 | decky | 172 | sysinfo_set_item_val("mouse", NULL, true); |
173 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
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174 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
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1 | jermar | 175 | } |
508 | jermar | 176 | |
511 | jermar | 177 | /* Called from getc(). */ |
575 | palkovsky | 178 | void i8042_resume(chardev_t *d) |
511 | jermar | 179 | { |
180 | } |
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181 | |||
182 | /* Called from getc(). */ |
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575 | palkovsky | 183 | void i8042_suspend(chardev_t *d) |
511 | jermar | 184 | { |
185 | } |
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878 | vana | 186 | |
1754 | jermar | 187 | /** @} |
1702 | cejka | 188 | */ |