bsp/drv/arm/gba/keypad.c

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This source file includes following definitions.
keypad_isr
keypad_init
   1 /*-
   2  * Copyright (c) 2005-2009, Kohsuke Ohtani
   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  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 
  30 /*
  31  * keypad.c - GBA gamepad driver
  32  */
  33 
  34 #include <driver.h>
  35 #include <sys/keycode.h>
  36 #include "swkbd.h"
  37 
  38 /* Parameters */
  39 #define KEYPAD_IRQ      12
  40 
  41 /* Registers for gamepad control */
  42 #define REG_KEYSTS      (*(volatile uint16_t *)0x4000130)
  43 #define REG_KEYCNT      (*(volatile uint16_t *)0x4000132)
  44 
  45 /* KEY_STS/KEY_CNT */
  46 #define KEY_A           0x0001
  47 #define KEY_B           0x0002
  48 #define KEY_SELECT      0x0004
  49 #define KEY_START       0x0008
  50 #define KEY_RIGHT       0x0010
  51 #define KEY_LEFT        0x0020
  52 #define KEY_UP          0x0040
  53 #define KEY_DOWN        0x0080
  54 #define KEY_R           0x0100
  55 #define KEY_L           0x0200
  56 
  57 #define KEY_ALL         0x03ff
  58 
  59 /* KEY_CNT value */
  60 #define KEYIRQ_EN       0x4000  /* 0=Disable, 1=Enable */
  61 #define KEYIRQ_COND     0x8000  /* 0=Logical OR, 1=Logical AND */
  62 
  63 
  64 struct keypad_softc {
  65         device_t        dev;
  66         irq_t           irq;
  67 };
  68 
  69 static int keypad_init(struct driver *);
  70 
  71 static struct devops keypad_devops = {
  72         /* open */      no_open,
  73         /* close */     no_close,
  74         /* read */      no_read,
  75         /* write */     no_write,
  76         /* ioctl */     no_ioctl,
  77         /* devctl */    no_devctl,
  78 };
  79 
  80 struct driver keypad_driver = {
  81         /* name */      "keypad",
  82         /* devops */    &keypad_devops,
  83         /* devsz */     sizeof(struct keypad_softc),
  84         /* flags */     0,
  85         /* probe */     NULL,
  86         /* init */      keypad_init,
  87         /* shutdown */  NULL,
  88 };
  89 
  90 /*
  91  * Interrupt service routine
  92  */
  93 static int
  94 keypad_isr(void *arg)
  95 {
  96         uint16_t sts;
  97 
  98         sts = ~REG_KEYSTS & KEY_ALL;
  99 
 100         if (sts == (KEY_SELECT|KEY_START))
 101                 machine_powerdown(PWR_REBOOT);
 102 
 103         if (sts & KEY_A)
 104                 swkbd_input('A');
 105         if (sts & KEY_B)
 106                 swkbd_input('B');
 107         if (sts & KEY_SELECT)
 108                 swkbd_input('\t');
 109         if (sts & KEY_START)
 110                 swkbd_input('\n');
 111         if (sts & KEY_RIGHT)
 112                 swkbd_input(K_RGHT);
 113         if (sts & KEY_LEFT)
 114                 swkbd_input(K_LEFT);
 115         if (sts & KEY_UP)
 116                 swkbd_input(K_UP);
 117         if (sts & KEY_DOWN)
 118                 swkbd_input(K_DOWN);
 119         if (sts & KEY_R)
 120                 swkbd_input('R');
 121         if (sts & KEY_L)
 122                 swkbd_input('L');
 123 
 124         return 0;
 125 }
 126 
 127 int
 128 keypad_init(struct driver *self)
 129 {
 130         struct keypad_softc *sc;
 131         device_t dev;
 132 
 133         dev = device_create(self, "keypad", D_CHR);
 134         sc = device_private(dev);
 135 
 136         /*
 137          * Setup isr
 138          */
 139         REG_KEYCNT = 0; /* disable irq */
 140         sc->irq = irq_attach(KEYPAD_IRQ, IPL_INPUT, 0, keypad_isr,
 141                              IST_NONE, sc);
 142         REG_KEYCNT = KEY_ALL | KEYIRQ_EN;
 143 
 144         return 0;
 145 }
 146
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root/bsp/drv/arm/gba/keypad.c

DEFINITIONS
