Subversion Repositories HelenOS

Rev

Rev 4669 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
4651 pillai 1
/*
2
 * Copyright (c) 2009 Vineeth Pillai
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
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
15
 *   derived from this software without specific prior written permission.
16
 *
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
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
/** @addtogroup genarch
30
 * @{
31
 */
32
/**
33
 * @file
34
 * @brief   pl050 keyboard/mouse driver.
35
 *
36
 * It takes care of low-level keyboard functions.
37
 */
38
 
39
#include <genarch/drivers/pl050/pl050.h>
40
#include <arch/asm.h>
41
#include <console/chardev.h>
42
#include <mm/slab.h>
43
#include <ddi/device.h>
44
 
45
#define PL050_KEY_RELEASE 0xF0
46
#define PL050_ESC_KEY   0xE0
47
#define PL050_CAPS_SCAN_CODE   0x58
48
 
49
/** Structure for pl050's IRQ. */
50
static pl050_t *pl050;
51
 
52
static irq_ownership_t pl050_claim(irq_t *irq)
53
{
54
    uint8_t status;
55
    if ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL)
56
        return IRQ_ACCEPT;
57
    else {
58
        return IRQ_DECLINE;
59
    }
60
}
61
 
62
static void pl050_irq_handler(irq_t *irq)
63
{
64
    uint8_t data;
65
    uint8_t status;
66
    pl050_instance_t *instance = irq->instance;
67
 
68
    while ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL) {
69
        data = pio_read_8(pl050->data);
70
        indev_push_character(instance->kbrdin, data);
71
 
72
    }
73
}
74
 
75
/** Initialize pl050. */
76
pl050_instance_t *pl050_init(pl050_t *dev, inr_t inr)
77
{
78
 
79
    pl050_instance_t *instance =
80
        malloc(sizeof(pl050_instance_t), FRAME_ATOMIC);
81
 
82
    pl050 = dev;
83
 
84
    if (instance) {
85
        instance->pl050 = dev;
86
        instance->kbrdin = NULL;
87
 
88
        irq_initialize(&instance->irq);
89
        instance->irq.devno = device_assign_devno();
90
        instance->irq.inr = inr;
91
        instance->irq.claim = pl050_claim;
92
        instance->irq.handler = pl050_irq_handler;
93
        instance->irq.instance = instance;
94
    }
95
 
96
    return instance;
97
}
98
 
99
void pl050_wire(pl050_instance_t *instance, indev_t *kbrdin)
100
{
101
    uint8_t val;
102
 
103
    instance->kbrdin = kbrdin;
104
    irq_register(&instance->irq);
105
 
106
    val = PL050_CR_RXINTR | PL050_CR_INTR;
107
 
108
    pio_write_8(pl050->ctrl, val);
109
 
110
    /* reset the data buffer */
111
    pio_read_8(pl050->data);
112
 
113
}
114
 
115
 
116
/** @}
117
 */