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1 | /* |
1 | /* |
2 | * Copyright (c) 2009 Jakub Jermar |
2 | * Copyright (c) 2009 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genarch |
29 | /** @addtogroup genarch |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** |
32 | /** |
33 | * @file |
33 | * @file |
34 | * @brief i8042 processor driver. |
34 | * @brief i8042 processor driver |
35 | * |
35 | * |
36 | * It takes care of low-level keyboard functions. |
36 | * It takes care of the i8042 serial communication. |
37 | */ |
37 | */ |
38 | 38 | ||
39 | #include <genarch/kbd/i8042.h> |
39 | #include <genarch/drivers/i8042/i8042.h> |
40 | #include <arch/drivers/kbd.h> |
- | |
41 | #include <genarch/kbd/key.h> |
- | |
42 | #include <genarch/kbd/scanc.h> |
- | |
43 | #include <genarch/kbd/scanc_pc.h> |
- | |
44 | #include <genarch/drivers/legacy/ia32/io.h> |
40 | #include <genarch/drivers/legacy/ia32/io.h> |
45 | #include <cpu.h> |
- | |
46 | #include <arch/asm.h> |
41 | #include <arch/asm.h> |
47 | #include <arch.h> |
- | |
48 | #include <console/chardev.h> |
42 | #include <console/chardev.h> |
49 | #include <console/console.h> |
- | |
50 | #include <interrupt.h> |
43 | #include <mm/slab.h> |
51 | - | ||
52 | /* Keyboard commands. */ |
- | |
53 | #define KBD_ENABLE 0xf4 |
- | |
54 | #define KBD_DISABLE 0xf5 |
- | |
55 | #define KBD_ACK 0xfa |
- | |
56 | - | ||
57 | /* |
- | |
58 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
- | |
59 | * placed in 8042 command register. Format: |
- | |
60 | * |
- | |
61 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
- | |
62 | * | | | | | | | `---- 1=enable output register full interrupt |
- | |
63 | * | | | | | | `----- should be 0 |
- | |
64 | * | | | | | `------ 1=set status register system, 0=clear |
- | |
65 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
- | |
66 | * | | | `-------- disable keyboard I/O by driving clock line low |
- | |
67 | * | | `--------- disable auxiliary device, drives clock line low |
- | |
68 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
- | |
69 | * `----------- reserved, should be 0 |
- | |
70 | */ |
- | |
71 | 44 | ||
72 | #define i8042_SET_COMMAND 0x60 |
45 | #define i8042_SET_COMMAND 0x60 |
73 | #define i8042_COMMAND 0x69 |
46 | #define i8042_COMMAND 0x69 |
74 | 47 | ||
75 | #define i8042_BUFFER_FULL_MASK 0x01 |
48 | #define i8042_BUFFER_FULL_MASK 0x01 |
76 | #define i8042_WAIT_MASK 0x02 |
49 | #define i8042_WAIT_MASK 0x02 |
77 | #define i8042_MOUSE_DATA 0x20 |
- | |
78 | - | ||
79 | static void i8042_suspend(chardev_t *); |
- | |
80 | static void i8042_resume(chardev_t *); |
- | |
81 | - | ||
82 | static chardev_operations_t ops = { |
- | |
83 | .suspend = i8042_suspend, |
- | |
84 | .resume = i8042_resume, |
- | |
85 | }; |
- | |
86 | 50 | ||
87 | static irq_ownership_t i8042_claim(irq_t *irq) |
51 | static irq_ownership_t i8042_claim(irq_t *irq) |
88 | { |
52 | { |
89 | i8042_instance_t *i8042_instance = irq->instance; |
53 | i8042_instance_t *i8042_instance = irq->instance; |
90 | i8042_t *dev = i8042_instance->i8042; |
54 | i8042_t *dev = i8042_instance->i8042; |
91 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
55 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
92 | return IRQ_ACCEPT; |
56 | return IRQ_ACCEPT; |
93 | else |
57 | else |
94 | return IRQ_DECLINE; |
58 | return IRQ_DECLINE; |
95 | } |
59 | } |
96 | 60 | ||
97 | static void i8042_irq_handler(irq_t *irq) |
61 | static void i8042_irq_handler(irq_t *irq) |
98 | { |
62 | { |
99 | i8042_instance_t *instance = irq->instance; |
63 | i8042_instance_t *instance = irq->instance; |
100 | i8042_t *dev = instance->i8042; |
64 | i8042_t *dev = instance->i8042; |
101 | 65 | ||
102 | uint8_t data; |
66 | uint8_t data; |
103 | uint8_t status; |
67 | uint8_t status; |
104 | 68 | ||
105 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
69 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
106 | data = pio_read_8(&dev->data); |
70 | data = pio_read_8(&dev->data); |
107 | 71 | ||
108 | if ((status & i8042_MOUSE_DATA)) |
- | |
109 | return; |
- | |
110 | - | ||
111 | if (data & KEY_RELEASE) |
72 | if (instance->devout) |
112 | key_released(data ^ KEY_RELEASE); |
73 | chardev_push_character(instance->devout, data); |
113 | else |
- | |
114 | key_pressed(data); |
- | |
115 | } |
74 | } |
116 | } |
75 | } |
117 | 76 | ||
118 | /** Initialize i8042. */ |
77 | /** Initialize i8042. */ |
119 | bool |
78 | bool |
120 | i8042_init(i8042_t *dev, devno_t devno, inr_t inr) |
79 | i8042_init(i8042_t *dev, devno_t devno, inr_t inr, chardev_t *devout) |
121 | { |
80 | { |
122 | i8042_instance_t *instance; |
81 | i8042_instance_t *instance; |
123 | 82 | ||
124 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
- | |
125 | stdin = &kbrd; |
- | |
126 | - | ||
127 | instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC); |
83 | instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC); |
128 | if (!instance) |
84 | if (!instance) |
129 | return false; |
85 | return false; |
130 | 86 | ||
131 | instance->devno = devno; |
87 | instance->devno = devno; |
132 | instance->i8042 = dev; |
88 | instance->i8042 = dev; |
- | 89 | instance->devout = devout; |
|
133 | 90 | ||
134 | irq_initialize(&instance->irq); |
91 | irq_initialize(&instance->irq); |
135 | instance->irq.devno = devno; |
92 | instance->irq.devno = devno; |
136 | instance->irq.inr = inr; |
93 | instance->irq.inr = inr; |
137 | instance->irq.claim = i8042_claim; |
94 | instance->irq.claim = i8042_claim; |
138 | instance->irq.handler = i8042_irq_handler; |
95 | instance->irq.handler = i8042_irq_handler; |
139 | instance->irq.instance = instance; |
96 | instance->irq.instance = instance; |
140 | irq_register(&instance->irq); |
97 | irq_register(&instance->irq); |
141 | 98 | ||
142 | trap_virtual_enable_irqs(1 << inr); |
- | |
143 | - | ||
144 | /* |
99 | /* |
145 | * Clear input buffer. |
100 | * Clear input buffer. |
146 | */ |
101 | */ |
147 | while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
102 | while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
148 | (void) pio_read_8(&dev->data); |
103 | (void) pio_read_8(&dev->data); |
149 | 104 | ||
150 | return true; |
105 | return true; |
151 | } |
106 | } |
152 | - | ||
153 | /* Called from getc(). */ |
- | |
154 | void i8042_resume(chardev_t *d) |
- | |
155 | { |
- | |
156 | } |
- | |
157 | - | ||
158 | /* Called from getc(). */ |
- | |
159 | void i8042_suspend(chardev_t *d) |
- | |
160 | { |
- | |
161 | } |
- | |
162 | 107 | ||
163 | /** @} |
108 | /** @} |
164 | */ |
109 | */ |
165 | 110 |