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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> |
2089 | decky | 52 | #include <ipc/irq.h> |
1 | jermar | 53 | |
3931 | jermar | 54 | i8042_instance_t lgcy_i8042_instance = { |
3932 | jermar | 55 | .i8042 = (i8042_t *) i8042_BASE, |
3931 | jermar | 56 | }; |
3928 | jermar | 57 | |
1754 | jermar | 58 | /* Keyboard commands. */ |
512 | jermar | 59 | #define KBD_ENABLE 0xf4 |
60 | #define KBD_DISABLE 0xf5 |
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61 | #define KBD_ACK 0xfa |
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62 | |||
670 | vana | 63 | /* |
893 | jermar | 64 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
895 | jermar | 65 | * placed in 8042 command register. Format: |
893 | jermar | 66 | * |
67 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
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68 | * | | | | | | | `---- 1=enable output register full interrupt |
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69 | * | | | | | | `----- should be 0 |
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70 | * | | | | | `------ 1=set status register system, 0=clear |
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71 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
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72 | * | | | `-------- disable keyboard I/O by driving clock line low |
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73 | * | | `--------- disable auxiliary device, drives clock line low |
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74 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
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75 | * `----------- reserved, should be 0 |
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76 | */ |
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670 | vana | 77 | |
893 | jermar | 78 | #define i8042_SET_COMMAND 0x60 |
1759 | palkovsky | 79 | #define i8042_COMMAND 0x69 |
894 | jermar | 80 | |
81 | #define i8042_BUFFER_FULL_MASK 0x01 |
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2321 | decky | 82 | #define i8042_WAIT_MASK 0x02 |
83 | #define i8042_MOUSE_DATA 0x20 |
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670 | vana | 84 | |
575 | palkovsky | 85 | static void i8042_suspend(chardev_t *); |
86 | static void i8042_resume(chardev_t *); |
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511 | jermar | 87 | |
88 | static chardev_operations_t ops = { |
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89 | .suspend = i8042_suspend, |
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878 | vana | 90 | .resume = i8042_resume, |
1896 | jermar | 91 | .read = i8042_key_read |
511 | jermar | 92 | }; |
93 | |||
1956 | decky | 94 | /** Structure for i8042's IRQ. */ |
1957 | decky | 95 | static irq_t i8042_kbd_irq; |
96 | static irq_t i8042_mouse_irq; |
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576 | palkovsky | 97 | |
1474 | palkovsky | 98 | void i8042_grab(void) |
1 | jermar | 99 | { |
1956 | decky | 100 | ipl_t ipl = interrupts_disable(); |
101 | |||
1957 | decky | 102 | spinlock_lock(&i8042_kbd_irq.lock); |
103 | i8042_kbd_irq.notif_cfg.notify = false; |
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104 | spinlock_unlock(&i8042_kbd_irq.lock); |
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105 | |||
106 | spinlock_lock(&i8042_mouse_irq.lock); |
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107 | i8042_mouse_irq.notif_cfg.notify = false; |
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108 | spinlock_unlock(&i8042_mouse_irq.lock); |
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109 | |||
1956 | decky | 110 | interrupts_restore(ipl); |
1474 | palkovsky | 111 | } |
1956 | decky | 112 | |
1474 | palkovsky | 113 | void i8042_release(void) |
114 | { |
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1956 | decky | 115 | ipl_t ipl = interrupts_disable(); |
1957 | decky | 116 | |
117 | spinlock_lock(&i8042_kbd_irq.lock); |
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118 | if (i8042_kbd_irq.notif_cfg.answerbox) |
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119 | i8042_kbd_irq.notif_cfg.notify = true; |
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120 | spinlock_unlock(&i8042_kbd_irq.lock); |
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121 | |||
122 | spinlock_lock(&i8042_mouse_irq.lock); |
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123 | if (i8042_mouse_irq.notif_cfg.answerbox) |
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124 | i8042_mouse_irq.notif_cfg.notify = true; |
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125 | spinlock_unlock(&i8042_mouse_irq.lock); |
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126 | |||
1956 | decky | 127 | interrupts_restore(ipl); |
1474 | palkovsky | 128 | } |
670 | vana | 129 | |
3906 | jermar | 130 | static irq_ownership_t i8042_claim(void *instance) |
1474 | palkovsky | 131 | { |
3931 | jermar | 132 | i8042_instance_t *i8042_instance = instance; |
133 | i8042_t *dev = i8042_instance->i8042; |
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134 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
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135 | return IRQ_ACCEPT; |
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136 | else |
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137 | return IRQ_DECLINE; |
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1956 | decky | 138 | } |
1474 | palkovsky | 139 | |
3906 | jermar | 140 | static void i8042_irq_handler(irq_t *irq) |
1956 | decky | 141 | { |
3931 | jermar | 142 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) { |
143 | /* |
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144 | * This will hopefully go to the IRQ dispatcher code soon. |
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145 | */ |
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1956 | decky | 146 | ipc_irq_send_notif(irq); |
3931 | jermar | 147 | return; |
148 | } |
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149 | |||
150 | i8042_instance_t *instance = irq->instance; |
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151 | i8042_t *dev = instance->i8042; |
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152 | |||
153 | uint8_t data; |
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154 | uint8_t status; |
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1956 | decky | 155 | |
3931 | jermar | 156 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
157 | data = pio_read_8(&dev->data); |
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1956 | decky | 158 | |
3931 | jermar | 159 | if ((status & i8042_MOUSE_DATA)) |
160 | return; |
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2321 | decky | 161 | |
3931 | jermar | 162 | if (data & KEY_RELEASE) |
163 | key_released(data ^ KEY_RELEASE); |
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164 | else |
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165 | key_pressed(data); |
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1956 | decky | 166 | } |
167 | } |
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1474 | palkovsky | 168 | |
1956 | decky | 169 | /** Initialize i8042. */ |
3928 | jermar | 170 | void |
171 | i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, |
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172 | inr_t mouse_inr) |
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1956 | decky | 173 | { |
3931 | jermar | 174 | i8042_t *dev = lgcy_i8042_instance.i8042; |
175 | |||
575 | palkovsky | 176 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
511 | jermar | 177 | stdin = &kbrd; |
1956 | decky | 178 | |
1957 | decky | 179 | irq_initialize(&i8042_kbd_irq); |
180 | i8042_kbd_irq.devno = kbd_devno; |
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181 | i8042_kbd_irq.inr = kbd_inr; |
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182 | i8042_kbd_irq.claim = i8042_claim; |
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2321 | decky | 183 | i8042_kbd_irq.handler = i8042_irq_handler; |
3931 | jermar | 184 | i8042_kbd_irq.instance = &lgcy_i8042_instance; |
1957 | decky | 185 | irq_register(&i8042_kbd_irq); |
1956 | decky | 186 | |
1957 | decky | 187 | irq_initialize(&i8042_mouse_irq); |
188 | i8042_mouse_irq.devno = mouse_devno; |
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189 | i8042_mouse_irq.inr = mouse_inr; |
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190 | i8042_mouse_irq.claim = i8042_claim; |
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2321 | decky | 191 | i8042_mouse_irq.handler = i8042_irq_handler; |
3931 | jermar | 192 | i8042_mouse_irq.instance = &lgcy_i8042_instance; |
1957 | decky | 193 | irq_register(&i8042_mouse_irq); |
3877 | decky | 194 | |
1957 | decky | 195 | trap_virtual_enable_irqs(1 << kbd_inr); |
196 | trap_virtual_enable_irqs(1 << mouse_inr); |
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3877 | decky | 197 | |
1194 | vana | 198 | /* |
1195 | jermar | 199 | * Clear input buffer. |
200 | * Number of iterations is limited to prevent infinite looping. |
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201 | */ |
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1956 | decky | 202 | int i; |
3931 | jermar | 203 | for (i = 0; (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) && |
3928 | jermar | 204 | i < 100; i++) { |
3931 | jermar | 205 | (void) pio_read_8(&dev->data); |
1753 | palkovsky | 206 | } |
1956 | decky | 207 | |
208 | sysinfo_set_item_val("kbd", NULL, true); |
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1957 | decky | 209 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
210 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
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3661 | vana | 211 | #ifdef KBD_LEGACY |
212 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
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3877 | decky | 213 | #endif |
1957 | decky | 214 | sysinfo_set_item_val("mouse", NULL, true); |
215 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
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216 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
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217 | |||
1956 | decky | 218 | i8042_grab(); |
1 | jermar | 219 | } |
508 | jermar | 220 | |
511 | jermar | 221 | /* Called from getc(). */ |
575 | palkovsky | 222 | void i8042_resume(chardev_t *d) |
511 | jermar | 223 | { |
224 | } |
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225 | |||
226 | /* Called from getc(). */ |
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575 | palkovsky | 227 | void i8042_suspend(chardev_t *d) |
511 | jermar | 228 | { |
229 | } |
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878 | vana | 230 | |
1896 | jermar | 231 | char i8042_key_read(chardev_t *d) |
878 | vana | 232 | { |
3931 | jermar | 233 | i8042_t *dev = lgcy_i8042_instance.i8042; |
3877 | decky | 234 | char ch; |
235 | |||
236 | while (!(ch = active_read_buff_read())) { |
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1780 | jermar | 237 | uint8_t x; |
3877 | decky | 238 | |
3931 | jermar | 239 | while (!(pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)) |
3928 | jermar | 240 | ; |
3877 | decky | 241 | |
3931 | jermar | 242 | x = pio_read_8(&dev->data); |
1842 | jermar | 243 | if (x & KEY_RELEASE) |
244 | key_released(x ^ KEY_RELEASE); |
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245 | else |
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246 | active_read_key_pressed(x); |
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878 | vana | 247 | } |
248 | return ch; |
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249 | } |
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895 | jermar | 250 | |
1754 | jermar | 251 | /** @} |
1702 | cejka | 252 | */ |