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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2004 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 low-level keyboard functions. |
37 | */ |
37 | */ |
38 | 38 | ||
39 | #include <genarch/kbd/i8042.h> |
39 | #include <genarch/kbd/i8042.h> |
40 | #include <arch/drivers/kbd.h> |
40 | #include <arch/drivers/kbd.h> |
41 | #include <genarch/kbd/key.h> |
41 | #include <genarch/kbd/key.h> |
42 | #include <genarch/kbd/scanc.h> |
42 | #include <genarch/kbd/scanc.h> |
43 | #include <genarch/kbd/scanc_pc.h> |
43 | #include <genarch/kbd/scanc_pc.h> |
44 | #include <genarch/drivers/legacy/ia32/io.h> |
44 | #include <genarch/drivers/legacy/ia32/io.h> |
45 | #include <cpu.h> |
45 | #include <cpu.h> |
46 | #include <arch/asm.h> |
46 | #include <arch/asm.h> |
47 | #include <arch.h> |
47 | #include <arch.h> |
48 | #include <console/chardev.h> |
48 | #include <console/chardev.h> |
49 | #include <console/console.h> |
49 | #include <console/console.h> |
50 | #include <interrupt.h> |
50 | #include <interrupt.h> |
51 | #include <sysinfo/sysinfo.h> |
- | |
52 | 51 | ||
53 | /* Keyboard commands. */ |
52 | /* Keyboard commands. */ |
54 | #define KBD_ENABLE 0xf4 |
53 | #define KBD_ENABLE 0xf4 |
55 | #define KBD_DISABLE 0xf5 |
54 | #define KBD_DISABLE 0xf5 |
56 | #define KBD_ACK 0xfa |
55 | #define KBD_ACK 0xfa |
57 | 56 | ||
58 | /* |
57 | /* |
59 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
58 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
60 | * placed in 8042 command register. Format: |
59 | * placed in 8042 command register. Format: |
61 | * |
60 | * |
62 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
61 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
63 | * | | | | | | | `---- 1=enable output register full interrupt |
62 | * | | | | | | | `---- 1=enable output register full interrupt |
64 | * | | | | | | `----- should be 0 |
63 | * | | | | | | `----- should be 0 |
65 | * | | | | | `------ 1=set status register system, 0=clear |
64 | * | | | | | `------ 1=set status register system, 0=clear |
66 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
65 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
67 | * | | | `-------- disable keyboard I/O by driving clock line low |
66 | * | | | `-------- disable keyboard I/O by driving clock line low |
68 | * | | `--------- disable auxiliary device, drives clock line low |
67 | * | | `--------- disable auxiliary device, drives clock line low |
69 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
68 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
70 | * `----------- reserved, should be 0 |
69 | * `----------- reserved, should be 0 |
71 | */ |
70 | */ |
72 | 71 | ||
73 | #define i8042_SET_COMMAND 0x60 |
72 | #define i8042_SET_COMMAND 0x60 |
74 | #define i8042_COMMAND 0x69 |
73 | #define i8042_COMMAND 0x69 |
75 | 74 | ||
76 | #define i8042_BUFFER_FULL_MASK 0x01 |
75 | #define i8042_BUFFER_FULL_MASK 0x01 |
77 | #define i8042_WAIT_MASK 0x02 |
76 | #define i8042_WAIT_MASK 0x02 |
78 | #define i8042_MOUSE_DATA 0x20 |
77 | #define i8042_MOUSE_DATA 0x20 |
79 | 78 | ||
80 | static void i8042_suspend(chardev_t *); |
79 | static void i8042_suspend(chardev_t *); |
81 | static void i8042_resume(chardev_t *); |
80 | static void i8042_resume(chardev_t *); |
82 | 81 | ||
83 | static chardev_operations_t ops = { |
82 | static chardev_operations_t ops = { |
84 | .suspend = i8042_suspend, |
83 | .suspend = i8042_suspend, |
85 | .resume = i8042_resume, |
84 | .resume = i8042_resume, |
86 | }; |
85 | }; |
87 | 86 | ||
88 | static irq_ownership_t i8042_claim(irq_t *irq) |
87 | static irq_ownership_t i8042_claim(irq_t *irq) |
89 | { |
88 | { |
90 | i8042_instance_t *i8042_instance = irq->instance; |
89 | i8042_instance_t *i8042_instance = irq->instance; |
91 | i8042_t *dev = i8042_instance->i8042; |
90 | i8042_t *dev = i8042_instance->i8042; |
92 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
91 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
93 | return IRQ_ACCEPT; |
92 | return IRQ_ACCEPT; |
94 | else |
93 | else |
95 | return IRQ_DECLINE; |
94 | return IRQ_DECLINE; |
96 | } |
95 | } |
97 | 96 | ||
98 | static void i8042_irq_handler(irq_t *irq) |
97 | static void i8042_irq_handler(irq_t *irq) |
99 | { |
98 | { |
100 | i8042_instance_t *instance = irq->instance; |
99 | i8042_instance_t *instance = irq->instance; |
101 | i8042_t *dev = instance->i8042; |
100 | i8042_t *dev = instance->i8042; |
102 | 101 | ||
103 | uint8_t data; |
102 | uint8_t data; |
104 | uint8_t status; |
103 | uint8_t status; |
105 | 104 | ||
106 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
105 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
107 | data = pio_read_8(&dev->data); |
106 | data = pio_read_8(&dev->data); |
108 | 107 | ||
109 | if ((status & i8042_MOUSE_DATA)) |
108 | if ((status & i8042_MOUSE_DATA)) |
110 | return; |
109 | return; |
111 | 110 | ||
112 | if (data & KEY_RELEASE) |
111 | if (data & KEY_RELEASE) |
113 | key_released(data ^ KEY_RELEASE); |
112 | key_released(data ^ KEY_RELEASE); |
114 | else |
113 | else |
115 | key_pressed(data); |
114 | key_pressed(data); |
116 | } |
115 | } |
117 | } |
116 | } |
118 | 117 | ||
119 | /** Initialize i8042. */ |
118 | /** Initialize i8042. */ |
120 | bool |
119 | bool |
121 | i8042_init(i8042_t *dev, devno_t devno, inr_t inr) |
120 | i8042_init(i8042_t *dev, devno_t devno, inr_t inr) |
122 | { |
121 | { |
123 | i8042_instance_t *instance; |
122 | i8042_instance_t *instance; |
124 | 123 | ||
125 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
124 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
126 | stdin = &kbrd; |
125 | stdin = &kbrd; |
127 | 126 | ||
128 | instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC); |
127 | instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC); |
129 | if (!instance) |
128 | if (!instance) |
130 | return false; |
129 | return false; |
131 | 130 | ||
132 | instance->devno = devno; |
131 | instance->devno = devno; |
133 | instance->i8042 = dev; |
132 | instance->i8042 = dev; |
134 | 133 | ||
135 | irq_initialize(&instance->irq); |
134 | irq_initialize(&instance->irq); |
136 | instance->irq.devno = devno; |
135 | instance->irq.devno = devno; |
137 | instance->irq.inr = inr; |
136 | instance->irq.inr = inr; |
138 | instance->irq.claim = i8042_claim; |
137 | instance->irq.claim = i8042_claim; |
139 | instance->irq.handler = i8042_irq_handler; |
138 | instance->irq.handler = i8042_irq_handler; |
140 | instance->irq.instance = instance; |
139 | instance->irq.instance = instance; |
141 | irq_register(&instance->irq); |
140 | irq_register(&instance->irq); |
142 | 141 | ||
143 | trap_virtual_enable_irqs(1 << inr); |
142 | trap_virtual_enable_irqs(1 << inr); |
144 | 143 | ||
145 | /* |
144 | /* |
146 | * Clear input buffer. |
145 | * Clear input buffer. |
147 | */ |
146 | */ |
148 | while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
147 | while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
149 | (void) pio_read_8(&dev->data); |
148 | (void) pio_read_8(&dev->data); |
150 | 149 | ||
151 | /* |
- | |
152 | * This is the necessary evil until the userspace driver is entirely |
- | |
153 | * self-sufficient. |
- | |
154 | */ |
- | |
155 | sysinfo_set_item_val("kbd", NULL, true); |
- | |
156 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
- | |
157 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
- | |
158 | #ifdef KBD_LEGACY |
- | |
159 | sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
- | |
160 | #endif |
- | |
161 | - | ||
162 | return true; |
150 | return true; |
163 | } |
151 | } |
164 | 152 | ||
165 | /* Called from getc(). */ |
153 | /* Called from getc(). */ |
166 | void i8042_resume(chardev_t *d) |
154 | void i8042_resume(chardev_t *d) |
167 | { |
155 | { |
168 | } |
156 | } |
169 | 157 | ||
170 | /* Called from getc(). */ |
158 | /* Called from getc(). */ |
171 | void i8042_suspend(chardev_t *d) |
159 | void i8042_suspend(chardev_t *d) |
172 | { |
160 | { |
173 | } |
161 | } |
174 | 162 | ||
175 | /** @} |
163 | /** @} |
176 | */ |
164 | */ |
177 | 165 |