source: mainline/kernel/genarch/src/drivers/pl050/pl050.c

Last change on this file was aafed15, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 7 years ago

Declare malloc() etc in standard <stdlib.h> rather than <mm/slab.h>

  • Property mode set to 100644
File size: 3.0 KB
Line 
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 kernel_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 <stdlib.h>
43
44#define PL050_KEY_RELEASE 0xF0
45#define PL050_ESC_KEY 0xE0
46#define PL050_CAPS_SCAN_CODE 0x58
47
48/** Structure for pl050's IRQ. */
49static pl050_t *pl050;
50
51static irq_ownership_t pl050_claim(irq_t *irq)
52{
53 uint8_t status;
54 if ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL)
55 return IRQ_ACCEPT;
56 else {
57 return IRQ_DECLINE;
58 }
59}
60
61static void pl050_irq_handler(irq_t *irq)
62{
63 uint8_t data;
64 uint8_t status;
65 pl050_instance_t *instance = irq->instance;
66
67 while ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL) {
68 data = pio_read_8(pl050->data);
69 indev_push_character(instance->kbrdin, data);
70
71 }
72}
73
74/** Initialize pl050. */
75pl050_instance_t *pl050_init(pl050_t *dev, inr_t inr)
76{
77
78 pl050_instance_t *instance =
79 malloc(sizeof(pl050_instance_t));
80
81 pl050 = dev;
82
83 if (instance) {
84 instance->pl050 = dev;
85 instance->kbrdin = NULL;
86
87 irq_initialize(&instance->irq);
88 instance->irq.inr = inr;
89 instance->irq.claim = pl050_claim;
90 instance->irq.handler = pl050_irq_handler;
91 instance->irq.instance = instance;
92 }
93
94 return instance;
95}
96
97void pl050_wire(pl050_instance_t *instance, indev_t *kbrdin)
98{
99 uint8_t val;
100
101 instance->kbrdin = kbrdin;
102 irq_register(&instance->irq);
103
104 val = PL050_CR_RXINTR | PL050_CR_INTR;
105
106 pio_write_8(pl050->ctrl, val);
107
108 /* reset the data buffer */
109 pio_read_8(pl050->data);
110
111}
112
113/** @}
114 */
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