root / prex-0.9.0 / bsp / drv / arm / gba / keypad.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 2005-2009, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | /*
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31 | * keypad.c - GBA gamepad driver
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32 | */
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33 | |||
34 | #include <driver.h> |
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35 | #include <sys/keycode.h> |
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36 | #include "swkbd.h" |
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37 | |||
38 | /* Parameters */
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39 | #define KEYPAD_IRQ 12 |
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40 | |||
41 | /* Registers for gamepad control */
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42 | #define REG_KEYSTS (*(volatile uint16_t *)0x4000130) |
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43 | #define REG_KEYCNT (*(volatile uint16_t *)0x4000132) |
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44 | |||
45 | /* KEY_STS/KEY_CNT */
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46 | #define KEY_A 0x0001 |
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47 | #define KEY_B 0x0002 |
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48 | #define KEY_SELECT 0x0004 |
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49 | #define KEY_START 0x0008 |
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50 | #define KEY_RIGHT 0x0010 |
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51 | #define KEY_LEFT 0x0020 |
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52 | #define KEY_UP 0x0040 |
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53 | #define KEY_DOWN 0x0080 |
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54 | #define KEY_R 0x0100 |
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55 | #define KEY_L 0x0200 |
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56 | |||
57 | #define KEY_ALL 0x03ff |
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58 | |||
59 | /* KEY_CNT value */
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60 | #define KEYIRQ_EN 0x4000 /* 0=Disable, 1=Enable */ |
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61 | #define KEYIRQ_COND 0x8000 /* 0=Logical OR, 1=Logical AND */ |
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62 | |||
63 | |||
64 | struct keypad_softc {
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65 | device_t dev; |
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66 | irq_t irq; |
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67 | }; |
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68 | |||
69 | static int keypad_init(struct driver *); |
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70 | |||
71 | static struct devops keypad_devops = { |
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72 | /* open */ no_open,
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73 | /* close */ no_close,
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74 | /* read */ no_read,
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75 | /* write */ no_write,
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76 | /* ioctl */ no_ioctl,
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77 | /* devctl */ no_devctl,
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78 | }; |
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79 | |||
80 | struct driver keypad_driver = {
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81 | /* name */ "keypad", |
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82 | /* devops */ &keypad_devops,
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83 | /* devsz */ sizeof(struct keypad_softc), |
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84 | /* flags */ 0, |
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85 | /* probe */ NULL, |
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86 | /* init */ keypad_init,
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87 | /* shutdown */ NULL, |
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88 | }; |
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89 | |||
90 | /*
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91 | * Interrupt service routine
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92 | */
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93 | static int |
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94 | keypad_isr(void *arg)
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95 | { |
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96 | uint16_t sts; |
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97 | |||
98 | sts = ~REG_KEYSTS & KEY_ALL; |
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99 | |||
100 | if (sts == (KEY_SELECT|KEY_START))
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101 | machine_powerdown(PWR_REBOOT); |
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102 | |||
103 | if (sts & KEY_A)
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104 | swkbd_input('A');
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105 | if (sts & KEY_B)
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106 | swkbd_input('B');
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107 | if (sts & KEY_SELECT)
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108 | swkbd_input('\t');
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109 | if (sts & KEY_START)
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110 | swkbd_input('\n');
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111 | if (sts & KEY_RIGHT)
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112 | swkbd_input(K_RGHT); |
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113 | if (sts & KEY_LEFT)
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114 | swkbd_input(K_LEFT); |
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115 | if (sts & KEY_UP)
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116 | swkbd_input(K_UP); |
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117 | if (sts & KEY_DOWN)
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118 | swkbd_input(K_DOWN); |
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119 | if (sts & KEY_R)
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120 | swkbd_input('R');
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121 | if (sts & KEY_L)
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122 | swkbd_input('L');
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123 | |||
124 | return 0; |
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125 | } |
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126 | |||
127 | int
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128 | keypad_init(struct driver *self)
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129 | { |
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130 | struct keypad_softc *sc;
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131 | device_t dev; |
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132 | |||
133 | dev = device_create(self, "keypad", D_CHR);
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134 | sc = device_private(dev); |
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135 | |||
136 | /*
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137 | * Setup isr
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138 | */
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139 | REG_KEYCNT = 0; /* disable irq */ |
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140 | sc->irq = irq_attach(KEYPAD_IRQ, IPL_INPUT, 0, keypad_isr,
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141 | IST_NONE, sc); |
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142 | REG_KEYCNT = KEY_ALL | KEYIRQ_EN; |
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143 | |||
144 | return 0; |
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145 | } |