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