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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 | |||
3941 | jermar | 92 | static irq_ownership_t i8042_claim(irq_t *irq) |
1474 | palkovsky | 93 | { |
3941 | jermar | 94 | i8042_instance_t *i8042_instance = irq->instance; |
3931 | jermar | 95 | i8042_t *dev = i8042_instance->i8042; |
96 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
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97 | return IRQ_ACCEPT; |
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98 | else |
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99 | return IRQ_DECLINE; |
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1956 | decky | 100 | } |
1474 | palkovsky | 101 | |
3906 | jermar | 102 | static void i8042_irq_handler(irq_t *irq) |
1956 | decky | 103 | { |
3931 | jermar | 104 | i8042_instance_t *instance = irq->instance; |
105 | i8042_t *dev = instance->i8042; |
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106 | |||
107 | uint8_t data; |
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108 | uint8_t status; |
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1956 | decky | 109 | |
3931 | jermar | 110 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
111 | data = pio_read_8(&dev->data); |
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1956 | decky | 112 | |
3931 | jermar | 113 | if ((status & i8042_MOUSE_DATA)) |
114 | return; |
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2321 | decky | 115 | |
3931 | jermar | 116 | if (data & KEY_RELEASE) |
117 | key_released(data ^ KEY_RELEASE); |
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118 | else |
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119 | key_pressed(data); |
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1956 | decky | 120 | } |
121 | } |
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1474 | palkovsky | 122 | |
1956 | decky | 123 | /** Initialize i8042. */ |
3963 | jermar | 124 | bool |
125 | i8042_init(i8042_t *dev, devno_t devno, inr_t inr) |
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1956 | decky | 126 | { |
3963 | jermar | 127 | i8042_instance_t *instance; |
3931 | jermar | 128 | |
575 | palkovsky | 129 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
511 | jermar | 130 | stdin = &kbrd; |
1956 | decky | 131 | |
3963 | jermar | 132 | instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC); |
133 | if (!instance) |
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134 | return false; |
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1956 | decky | 135 | |
3963 | jermar | 136 | instance->devno = devno; |
137 | instance->i8042 = dev; |
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3877 | decky | 138 | |
3963 | jermar | 139 | irq_initialize(&instance->irq); |
140 | instance->irq.devno = devno; |
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141 | instance->irq.inr = inr; |
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142 | instance->irq.claim = i8042_claim; |
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143 | instance->irq.handler = i8042_irq_handler; |
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144 | instance->irq.instance = instance; |
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145 | irq_register(&instance->irq); |
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3877 | decky | 146 | |
3963 | jermar | 147 | trap_virtual_enable_irqs(1 << inr); |
148 | |||
1194 | vana | 149 | /* |
1195 | jermar | 150 | * Clear input buffer. |
151 | */ |
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3958 | jermar | 152 | while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
3931 | jermar | 153 | (void) pio_read_8(&dev->data); |
1956 | decky | 154 | |
3958 | jermar | 155 | /* |
156 | * This is the necessary evil until the userspace driver is entirely |
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157 | * self-sufficient. |
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158 | */ |
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1956 | decky | 159 | sysinfo_set_item_val("kbd", NULL, true); |
3963 | jermar | 160 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
161 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
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3661 | vana | 162 | #ifdef KBD_LEGACY |
163 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
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3877 | decky | 164 | #endif |
3963 | jermar | 165 | |
166 | return true; |
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1 | jermar | 167 | } |
508 | jermar | 168 | |
511 | jermar | 169 | /* Called from getc(). */ |
575 | palkovsky | 170 | void i8042_resume(chardev_t *d) |
511 | jermar | 171 | { |
172 | } |
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173 | |||
174 | /* Called from getc(). */ |
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575 | palkovsky | 175 | void i8042_suspend(chardev_t *d) |
511 | jermar | 176 | { |
177 | } |
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878 | vana | 178 | |
1754 | jermar | 179 | /** @} |
1702 | cejka | 180 | */ |