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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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1 | jermar | 44 | #include <cpu.h> |
45 | #include <arch/asm.h> |
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46 | #include <arch.h> |
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511 | jermar | 47 | #include <console/chardev.h> |
48 | #include <console/console.h> |
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576 | palkovsky | 49 | #include <interrupt.h> |
1956 | decky | 50 | #include <sysinfo/sysinfo.h> |
2089 | decky | 51 | #include <ipc/irq.h> |
1 | jermar | 52 | |
3931 | jermar | 53 | i8042_instance_t lgcy_i8042_instance = { |
54 | .i8042 = (i8042_t *) 0x60, |
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55 | }; |
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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, |
1896 | jermar | 90 | .read = i8042_key_read |
511 | jermar | 91 | }; |
92 | |||
1956 | decky | 93 | /** Structure for i8042's IRQ. */ |
1957 | decky | 94 | static irq_t i8042_kbd_irq; |
95 | static irq_t i8042_mouse_irq; |
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576 | palkovsky | 96 | |
1474 | palkovsky | 97 | void i8042_grab(void) |
1 | jermar | 98 | { |
1956 | decky | 99 | ipl_t ipl = interrupts_disable(); |
100 | |||
1957 | decky | 101 | spinlock_lock(&i8042_kbd_irq.lock); |
102 | i8042_kbd_irq.notif_cfg.notify = false; |
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103 | spinlock_unlock(&i8042_kbd_irq.lock); |
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104 | |||
105 | spinlock_lock(&i8042_mouse_irq.lock); |
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106 | i8042_mouse_irq.notif_cfg.notify = false; |
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107 | spinlock_unlock(&i8042_mouse_irq.lock); |
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108 | |||
1956 | decky | 109 | interrupts_restore(ipl); |
1474 | palkovsky | 110 | } |
1956 | decky | 111 | |
1474 | palkovsky | 112 | void i8042_release(void) |
113 | { |
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1956 | decky | 114 | ipl_t ipl = interrupts_disable(); |
1957 | decky | 115 | |
116 | spinlock_lock(&i8042_kbd_irq.lock); |
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117 | if (i8042_kbd_irq.notif_cfg.answerbox) |
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118 | i8042_kbd_irq.notif_cfg.notify = true; |
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119 | spinlock_unlock(&i8042_kbd_irq.lock); |
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120 | |||
121 | spinlock_lock(&i8042_mouse_irq.lock); |
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122 | if (i8042_mouse_irq.notif_cfg.answerbox) |
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123 | i8042_mouse_irq.notif_cfg.notify = true; |
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124 | spinlock_unlock(&i8042_mouse_irq.lock); |
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125 | |||
1956 | decky | 126 | interrupts_restore(ipl); |
1474 | palkovsky | 127 | } |
670 | vana | 128 | |
3906 | jermar | 129 | static irq_ownership_t i8042_claim(void *instance) |
1474 | palkovsky | 130 | { |
3931 | jermar | 131 | i8042_instance_t *i8042_instance = instance; |
132 | i8042_t *dev = i8042_instance->i8042; |
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133 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
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134 | return IRQ_ACCEPT; |
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135 | else |
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136 | return IRQ_DECLINE; |
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1956 | decky | 137 | } |
1474 | palkovsky | 138 | |
3906 | jermar | 139 | static void i8042_irq_handler(irq_t *irq) |
1956 | decky | 140 | { |
3931 | jermar | 141 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) { |
142 | /* |
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143 | * This will hopefully go to the IRQ dispatcher code soon. |
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144 | */ |
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1956 | decky | 145 | ipc_irq_send_notif(irq); |
3931 | jermar | 146 | return; |
147 | } |
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148 | |||
149 | i8042_instance_t *instance = irq->instance; |
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150 | i8042_t *dev = instance->i8042; |
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151 | |||
152 | uint8_t data; |
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153 | uint8_t status; |
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1956 | decky | 154 | |
3931 | jermar | 155 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
156 | data = pio_read_8(&dev->data); |
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1956 | decky | 157 | |
3931 | jermar | 158 | if ((status & i8042_MOUSE_DATA)) |
159 | return; |
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2321 | decky | 160 | |
3931 | jermar | 161 | if (data & KEY_RELEASE) |
162 | key_released(data ^ KEY_RELEASE); |
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163 | else |
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164 | key_pressed(data); |
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1956 | decky | 165 | } |
166 | } |
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1474 | palkovsky | 167 | |
1956 | decky | 168 | /** Initialize i8042. */ |
3928 | jermar | 169 | void |
170 | i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, |
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171 | inr_t mouse_inr) |
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1956 | decky | 172 | { |
3931 | jermar | 173 | i8042_t *dev = lgcy_i8042_instance.i8042; |
174 | |||
575 | palkovsky | 175 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
511 | jermar | 176 | stdin = &kbrd; |
1956 | decky | 177 | |
1957 | decky | 178 | irq_initialize(&i8042_kbd_irq); |
179 | i8042_kbd_irq.devno = kbd_devno; |
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180 | i8042_kbd_irq.inr = kbd_inr; |
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181 | i8042_kbd_irq.claim = i8042_claim; |
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2321 | decky | 182 | i8042_kbd_irq.handler = i8042_irq_handler; |
3931 | jermar | 183 | i8042_kbd_irq.instance = &lgcy_i8042_instance; |
1957 | decky | 184 | irq_register(&i8042_kbd_irq); |
1956 | decky | 185 | |
1957 | decky | 186 | irq_initialize(&i8042_mouse_irq); |
187 | i8042_mouse_irq.devno = mouse_devno; |
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188 | i8042_mouse_irq.inr = mouse_inr; |
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189 | i8042_mouse_irq.claim = i8042_claim; |
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2321 | decky | 190 | i8042_mouse_irq.handler = i8042_irq_handler; |
3931 | jermar | 191 | i8042_mouse_irq.instance = &lgcy_i8042_instance; |
1957 | decky | 192 | irq_register(&i8042_mouse_irq); |
3877 | decky | 193 | |
1957 | decky | 194 | trap_virtual_enable_irqs(1 << kbd_inr); |
195 | trap_virtual_enable_irqs(1 << mouse_inr); |
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3877 | decky | 196 | |
1194 | vana | 197 | /* |
1195 | jermar | 198 | * Clear input buffer. |
199 | * Number of iterations is limited to prevent infinite looping. |
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200 | */ |
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1956 | decky | 201 | int i; |
3931 | jermar | 202 | for (i = 0; (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) && |
3928 | jermar | 203 | i < 100; i++) { |
3931 | jermar | 204 | (void) pio_read_8(&dev->data); |
1753 | palkovsky | 205 | } |
1956 | decky | 206 | |
207 | sysinfo_set_item_val("kbd", NULL, true); |
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1957 | decky | 208 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
209 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
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3661 | vana | 210 | #ifdef KBD_LEGACY |
211 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
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3877 | decky | 212 | #endif |
1957 | decky | 213 | sysinfo_set_item_val("mouse", NULL, true); |
214 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
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215 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
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216 | |||
1956 | decky | 217 | i8042_grab(); |
1 | jermar | 218 | } |
508 | jermar | 219 | |
511 | jermar | 220 | /* Called from getc(). */ |
575 | palkovsky | 221 | void i8042_resume(chardev_t *d) |
511 | jermar | 222 | { |
223 | } |
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224 | |||
225 | /* Called from getc(). */ |
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575 | palkovsky | 226 | void i8042_suspend(chardev_t *d) |
511 | jermar | 227 | { |
228 | } |
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878 | vana | 229 | |
1896 | jermar | 230 | char i8042_key_read(chardev_t *d) |
878 | vana | 231 | { |
3931 | jermar | 232 | i8042_t *dev = lgcy_i8042_instance.i8042; |
3877 | decky | 233 | char ch; |
234 | |||
235 | while (!(ch = active_read_buff_read())) { |
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1780 | jermar | 236 | uint8_t x; |
3877 | decky | 237 | |
3931 | jermar | 238 | while (!(pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)) |
3928 | jermar | 239 | ; |
3877 | decky | 240 | |
3931 | jermar | 241 | x = pio_read_8(&dev->data); |
1842 | jermar | 242 | if (x & KEY_RELEASE) |
243 | key_released(x ^ KEY_RELEASE); |
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244 | else |
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245 | active_read_key_pressed(x); |
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878 | vana | 246 | } |
247 | return ch; |
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248 | } |
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895 | jermar | 249 | |
1754 | jermar | 250 | /** @} |
1702 | cejka | 251 | */ |