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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 the i8042 serial communication. |
36 | * It takes care of the i8042 serial communication. |
37 | */ |
37 | */ |
38 | 38 | ||
39 | #include <genarch/drivers/i8042/i8042.h> |
39 | #include <genarch/drivers/i8042/i8042.h> |
40 | #include <genarch/drivers/legacy/ia32/io.h> |
40 | #include <genarch/drivers/legacy/ia32/io.h> |
41 | #include <arch/asm.h> |
41 | #include <arch/asm.h> |
42 | #include <console/chardev.h> |
42 | #include <console/chardev.h> |
43 | #include <mm/slab.h> |
43 | #include <mm/slab.h> |
- | 44 | #include <ddi/device.h> |
|
44 | 45 | ||
45 | static indev_operations_t kbrdin_ops = { |
46 | static indev_operations_t kbrdin_ops = { |
46 | .poll = NULL |
47 | .poll = NULL |
47 | }; |
48 | }; |
48 | 49 | ||
49 | #define i8042_SET_COMMAND 0x60 |
50 | #define i8042_SET_COMMAND 0x60 |
50 | #define i8042_COMMAND 0x69 |
51 | #define i8042_COMMAND 0x69 |
51 | 52 | ||
52 | #define i8042_BUFFER_FULL_MASK 0x01 |
53 | #define i8042_BUFFER_FULL_MASK 0x01 |
53 | #define i8042_WAIT_MASK 0x02 |
54 | #define i8042_WAIT_MASK 0x02 |
54 | 55 | ||
55 | static irq_ownership_t i8042_claim(irq_t *irq) |
56 | static irq_ownership_t i8042_claim(irq_t *irq) |
56 | { |
57 | { |
57 | i8042_instance_t *i8042_instance = irq->instance; |
58 | i8042_instance_t *i8042_instance = irq->instance; |
58 | i8042_t *dev = i8042_instance->i8042; |
59 | i8042_t *dev = i8042_instance->i8042; |
59 | 60 | ||
60 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
61 | if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
61 | return IRQ_ACCEPT; |
62 | return IRQ_ACCEPT; |
62 | else |
63 | else |
63 | return IRQ_DECLINE; |
64 | return IRQ_DECLINE; |
64 | } |
65 | } |
65 | 66 | ||
66 | static void i8042_irq_handler(irq_t *irq) |
67 | static void i8042_irq_handler(irq_t *irq) |
67 | { |
68 | { |
68 | i8042_instance_t *instance = irq->instance; |
69 | i8042_instance_t *instance = irq->instance; |
69 | i8042_t *dev = instance->i8042; |
70 | i8042_t *dev = instance->i8042; |
70 | uint8_t status; |
71 | uint8_t status; |
71 | 72 | ||
72 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
73 | if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) { |
73 | uint8_t data = pio_read_8(&dev->data); |
74 | uint8_t data = pio_read_8(&dev->data); |
74 | indev_push_character(&instance->kbrdin, data); |
75 | indev_push_character(&instance->kbrdin, data); |
75 | } |
76 | } |
76 | } |
77 | } |
77 | 78 | ||
78 | /** Initialize i8042. */ |
79 | /** Initialize i8042. */ |
79 | indev_t *i8042_init(i8042_t *dev, devno_t devno, inr_t inr) |
80 | indev_t *i8042_init(i8042_t *dev, inr_t inr) |
80 | { |
81 | { |
81 | i8042_instance_t *instance |
82 | i8042_instance_t *instance |
82 | = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC); |
83 | = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC); |
83 | if (!instance) |
84 | if (!instance) |
84 | return NULL; |
85 | return NULL; |
85 | 86 | ||
86 | indev_initialize("i8042", &instance->kbrdin, &kbrdin_ops); |
87 | indev_initialize("i8042", &instance->kbrdin, &kbrdin_ops); |
87 | 88 | ||
88 | instance->devno = devno; |
- | |
89 | instance->i8042 = dev; |
89 | instance->i8042 = dev; |
90 | 90 | ||
91 | irq_initialize(&instance->irq); |
91 | irq_initialize(&instance->irq); |
92 | instance->irq.devno = devno; |
92 | instance->irq.devno = device_assign_devno(); |
93 | instance->irq.inr = inr; |
93 | instance->irq.inr = inr; |
94 | instance->irq.claim = i8042_claim; |
94 | instance->irq.claim = i8042_claim; |
95 | instance->irq.handler = i8042_irq_handler; |
95 | instance->irq.handler = i8042_irq_handler; |
96 | instance->irq.instance = instance; |
96 | instance->irq.instance = instance; |
97 | irq_register(&instance->irq); |
97 | irq_register(&instance->irq); |
98 | 98 | ||
99 | /* |
99 | /* |
100 | * Clear input buffer. |
100 | * Clear input buffer. |
101 | */ |
101 | */ |
102 | while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
102 | while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) |
103 | (void) pio_read_8(&dev->data); |
103 | (void) pio_read_8(&dev->data); |
104 | 104 | ||
105 | return &instance->kbrdin; |
105 | return &instance->kbrdin; |
106 | } |
106 | } |
107 | 107 | ||
108 | /** @} |
108 | /** @} |
109 | */ |
109 | */ |
110 | 110 |