drivers/input/keyboard/atakbd.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  atakbd.c
   4  *
   5  *  Copyright (c) 2005 Michael Schmitz
   6  *
   7  * Based on amikbd.c, which is
   8  *
   9  *  Copyright (c) 2000-2001 Vojtech Pavlik
  10  *
  11  *  Based on the work of:
  12  *      Hamish Macdonald
  13  */
  14
  15 /*
  16  * Atari keyboard driver for Linux/m68k
  17  *
  18  * The low level init and interrupt stuff is handled in arch/mm68k/atari/atakeyb.c
  19  * (the keyboard ACIA also handles the mouse and joystick data, and the keyboard
  20  * interrupt is shared with the MIDI ACIA so MIDI data also get handled there).
  21  * This driver only deals with handing key events off to the input layer.
  22  */
  23
  24 /*
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/init.h>
  29 #include <linux/input.h>
  30 #include <linux/delay.h>
  31 #include <linux/interrupt.h>
  32
  33 #include <asm/atariints.h>
  34 #include <asm/atarihw.h>
  35 #include <asm/atarikb.h>
  36 #include <asm/irq.h>
  37
  38 MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
  39 MODULE_DESCRIPTION("Atari keyboard driver");
  40 MODULE_LICENSE("GPL");
  41
  42 /*
  43  0x47: KP_7     71
  44  0x48: KP_8     72
  45  0x49: KP_9     73
  46  0x62: KP_/     98
  47  0x4b: KP_4     75
  48  0x4c: KP_5     76
  49  0x4d: KP_6     77
  50  0x37: KP_*     55
  51  0x4f: KP_1     79
  52  0x50: KP_2     80
  53  0x51: KP_3     81
  54  0x4a: KP_-     74
  55  0x52: KP_0     82
  56  0x53: KP_.     83
  57  0x4e: KP_+     78
  58
  59  0x67: Up       103
  60  0x6c: Down     108
  61  0x69: Left     105
  62  0x6a: Right    106
  63  */
  64
  65
  66 static unsigned char atakbd_keycode[0x73] = {   /* American layout */
  67         [1]      = KEY_ESC,
  68         [2]      = KEY_1,
  69         [3]      = KEY_2,
  70         [4]      = KEY_3,
  71         [5]      = KEY_4,
  72         [6]      = KEY_5,
  73         [7]      = KEY_6,
  74         [8]      = KEY_7,
  75         [9]      = KEY_8,
  76         [10]     = KEY_9,
  77         [11]     = KEY_0,
  78         [12]     = KEY_MINUS,
  79         [13]     = KEY_EQUAL,
  80         [14]     = KEY_BACKSPACE,
  81         [15]     = KEY_TAB,
  82         [16]     = KEY_Q,
  83         [17]     = KEY_W,
  84         [18]     = KEY_E,
  85         [19]     = KEY_R,
  86         [20]     = KEY_T,
  87         [21]     = KEY_Y,
  88         [22]     = KEY_U,
  89         [23]     = KEY_I,
  90         [24]     = KEY_O,
  91         [25]     = KEY_P,
  92         [26]     = KEY_LEFTBRACE,
  93         [27]     = KEY_RIGHTBRACE,
  94         [28]     = KEY_ENTER,
  95         [29]     = KEY_LEFTCTRL,
  96         [30]     = KEY_A,
  97         [31]     = KEY_S,
  98         [32]     = KEY_D,
  99         [33]     = KEY_F,
 100         [34]     = KEY_G,
 101         [35]     = KEY_H,
 102         [36]     = KEY_J,
 103         [37]     = KEY_K,
 104         [38]     = KEY_L,
 105         [39]     = KEY_SEMICOLON,
 106         [40]     = KEY_APOSTROPHE,
 107         [41]     = KEY_GRAVE,
 108         [42]     = KEY_LEFTSHIFT,
 109         [43]     = KEY_BACKSLASH,
 110         [44]     = KEY_Z,
 111         [45]     = KEY_X,
 112         [46]     = KEY_C,
 113         [47]     = KEY_V,
 114         [48]     = KEY_B,
 115         [49]     = KEY_N,
 116         [50]     = KEY_M,
 117         [51]     = KEY_COMMA,
 118         [52]     = KEY_DOT,
 119         [53]     = KEY_SLASH,
 120         [54]     = KEY_RIGHTSHIFT,
 121         [55]     = KEY_KPASTERISK,
 122         [56]     = KEY_LEFTALT,
 123         [57]     = KEY_SPACE,
 124         [58]     = KEY_CAPSLOCK,
 125         [59]     = KEY_F1,
 126         [60]     = KEY_F2,
 127         [61]     = KEY_F3,
 128         [62]     = KEY_F4,
 129         [63]     = KEY_F5,
 130         [64]     = KEY_F6,
 131         [65]     = KEY_F7,
 132         [66]     = KEY_F8,
 133         [67]     = KEY_F9,
 134         [68]     = KEY_F10,
 135         [71]     = KEY_HOME,
 136         [72]     = KEY_UP,
 137         [74]     = KEY_KPMINUS,
 138         [75]     = KEY_LEFT,
 139         [77]     = KEY_RIGHT,
 140         [78]     = KEY_KPPLUS,
 141         [80]     = KEY_DOWN,
 142         [82]     = KEY_INSERT,
 143         [83]     = KEY_DELETE,
 144         [96]     = KEY_102ND,
 145         [97]     = KEY_UNDO,
 146         [98]     = KEY_HELP,
 147         [99]     = KEY_KPLEFTPAREN,
 148         [100]    = KEY_KPRIGHTPAREN,
 149         [101]    = KEY_KPSLASH,
 150         [102]    = KEY_KPASTERISK,
 151         [103]    = KEY_KP7,
 152         [104]    = KEY_KP8,
 153         [105]    = KEY_KP9,
 154         [106]    = KEY_KP4,
 155         [107]    = KEY_KP5,
 156         [108]    = KEY_KP6,
 157         [109]    = KEY_KP1,
 158         [110]    = KEY_KP2,
 159         [111]    = KEY_KP3,
 160         [112]    = KEY_KP0,
 161         [113]    = KEY_KPDOT,
 162         [114]    = KEY_KPENTER,
 163 };
 164
 165 static struct input_dev *atakbd_dev;
 166
 167 static void atakbd_interrupt(unsigned char scancode, char down)
 168 {
 169
 170         if (scancode < 0x73) {          /* scancodes < 0xf3 are keys */
 171
 172                 // report raw events here?
 173
 174                 scancode = atakbd_keycode[scancode];
 175
 176                 input_report_key(atakbd_dev, scancode, down);
 177                 input_sync(atakbd_dev);
 178         } else                          /* scancodes >= 0xf3 are mouse data, most likely */
 179                 printk(KERN_INFO "atakbd: unhandled scancode %x\n", scancode);
 180
 181         return;
 182 }
 183
 184 static int __init atakbd_init(void)
 185 {
 186         int i, error;
 187
 188         if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
 189                 return -ENODEV;
 190
 191         // need to init core driver if not already done so
 192         error = atari_keyb_init();
 193         if (error)
 194                 return error;
 195
 196         atakbd_dev = input_allocate_device();
 197         if (!atakbd_dev)
 198                 return -ENOMEM;
 199
 200         atakbd_dev->name = "Atari Keyboard";
 201         atakbd_dev->phys = "atakbd/input0";
 202         atakbd_dev->id.bustype = BUS_HOST;
 203         atakbd_dev->id.vendor = 0x0001;
 204         atakbd_dev->id.product = 0x0001;
 205         atakbd_dev->id.version = 0x0100;
 206
 207         atakbd_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 208         atakbd_dev->keycode = atakbd_keycode;
 209         atakbd_dev->keycodesize = sizeof(unsigned char);
 210         atakbd_dev->keycodemax = ARRAY_SIZE(atakbd_keycode);
 211
 212         for (i = 1; i < 0x72; i++) {
 213                 set_bit(atakbd_keycode[i], atakbd_dev->keybit);
 214         }
 215
 216         /* error check */
 217         error = input_register_device(atakbd_dev);
 218         if (error) {
 219                 input_free_device(atakbd_dev);
 220                 return error;
 221         }
 222
 223         atari_input_keyboard_interrupt_hook = atakbd_interrupt;
 224
 225         return 0;
 226 }
 227
 228 static void __exit atakbd_exit(void)
 229 {
 230         atari_input_keyboard_interrupt_hook = NULL;
 231         input_unregister_device(atakbd_dev);
 232 }
 233
 234 module_init(atakbd_init);
 235 module_exit(atakbd_exit);