drivers/input/keyboard/amikbd.c

   1 /*
   2  * $Id: amikbd.c,v 1.13 2002/02/01 16:02:24 vojtech Exp $
   3  *
   4  *  Copyright (c) 2000-2001 Vojtech Pavlik
   5  *
   6  *  Based on the work of:
   7  *      Hamish Macdonald
   8  */
   9
  10 /*
  11  * Amiga keyboard driver for Linux/m68k
  12  */
  13
  14 /*
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  28  *
  29  * Should you need to contact me, the author, you can do so either by
  30  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  31  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/init.h>
  36 #include <linux/input.h>
  37 #include <linux/delay.h>
  38 #include <linux/interrupt.h>
  39
  40 #include <asm/amigaints.h>
  41 #include <asm/amigahw.h>
  42 #include <asm/irq.h>
  43
  44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  45 MODULE_DESCRIPTION("Amiga keyboard driver");
  46 MODULE_LICENSE("GPL");
  47
  48 static unsigned char amikbd_keycode[0x78] = {
  49         [0]      = KEY_GRAVE,
  50         [1]      = KEY_1,
  51         [2]      = KEY_2,
  52         [3]      = KEY_3,
  53         [4]      = KEY_4,
  54         [5]      = KEY_5,
  55         [6]      = KEY_6,
  56         [7]      = KEY_7,
  57         [8]      = KEY_8,
  58         [9]      = KEY_9,
  59         [10]     = KEY_0,
  60         [11]     = KEY_MINUS,
  61         [12]     = KEY_EQUAL,
  62         [13]     = KEY_BACKSLASH,
  63         [15]     = KEY_KP0,
  64         [16]     = KEY_Q,
  65         [17]     = KEY_W,
  66         [18]     = KEY_E,
  67         [19]     = KEY_R,
  68         [20]     = KEY_T,
  69         [21]     = KEY_Y,
  70         [22]     = KEY_U,
  71         [23]     = KEY_I,
  72         [24]     = KEY_O,
  73         [25]     = KEY_P,
  74         [26]     = KEY_LEFTBRACE,
  75         [27]     = KEY_RIGHTBRACE,
  76         [29]     = KEY_KP1,
  77         [30]     = KEY_KP2,
  78         [31]     = KEY_KP3,
  79         [32]     = KEY_A,
  80         [33]     = KEY_S,
  81         [34]     = KEY_D,
  82         [35]     = KEY_F,
  83         [36]     = KEY_G,
  84         [37]     = KEY_H,
  85         [38]     = KEY_J,
  86         [39]     = KEY_K,
  87         [40]     = KEY_L,
  88         [41]     = KEY_SEMICOLON,
  89         [42]     = KEY_APOSTROPHE,
  90         [43]     = KEY_BACKSLASH,
  91         [45]     = KEY_KP4,
  92         [46]     = KEY_KP5,
  93         [47]     = KEY_KP6,
  94         [48]     = KEY_102ND,
  95         [49]     = KEY_Z,
  96         [50]     = KEY_X,
  97         [51]     = KEY_C,
  98         [52]     = KEY_V,
  99         [53]     = KEY_B,
 100         [54]     = KEY_N,
 101         [55]     = KEY_M,
 102         [56]     = KEY_COMMA,
 103         [57]     = KEY_DOT,
 104         [58]     = KEY_SLASH,
 105         [60]     = KEY_KPDOT,
 106         [61]     = KEY_KP7,
 107         [62]     = KEY_KP8,
 108         [63]     = KEY_KP9,
 109         [64]     = KEY_SPACE,
 110         [65]     = KEY_BACKSPACE,
 111         [66]     = KEY_TAB,
 112         [67]     = KEY_KPENTER,
 113         [68]     = KEY_ENTER,
 114         [69]     = KEY_ESC,
 115         [70]     = KEY_DELETE,
 116         [74]     = KEY_KPMINUS,
 117         [76]     = KEY_UP,
 118         [77]     = KEY_DOWN,
 119         [78]     = KEY_RIGHT,
 120         [79]     = KEY_LEFT,
 121         [80]     = KEY_F1,
 122         [81]     = KEY_F2,
 123         [82]     = KEY_F3,
 124         [83]     = KEY_F4,
 125         [84]     = KEY_F5,
 126         [85]     = KEY_F6,
 127         [86]     = KEY_F7,
 128         [87]     = KEY_F8,
 129         [88]     = KEY_F9,
 130         [89]     = KEY_F10,
 131         [90]     = KEY_KPLEFTPAREN,
 132         [91]     = KEY_KPRIGHTPAREN,
 133         [92]     = KEY_KPSLASH,
 134         [93]     = KEY_KPASTERISK,
 135         [94]     = KEY_KPPLUS,
 136         [95]     = KEY_HELP,
 137         [96]     = KEY_LEFTSHIFT,
 138         [97]     = KEY_RIGHTSHIFT,
 139         [98]     = KEY_CAPSLOCK,
 140         [99]     = KEY_LEFTCTRL,
 141         [100]    = KEY_LEFTALT,
 142         [101]    = KEY_RIGHTALT,
 143         [102]    = KEY_LEFTMETA,
 144         [103]    = KEY_RIGHTMETA
 145 };
 146
 147 static const char *amikbd_messages[8] = {
 148         [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
 149         [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
 150         [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
 151         [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
 152         [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
 153         [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
 154         [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
 155         [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
 156 };
 157
 158 static struct input_dev *amikbd_dev;
 159
 160 static irqreturn_t amikbd_interrupt(int irq, void *dummy, struct pt_regs *fp)
 161 {
 162         unsigned char scancode, down;
 163
 164         scancode = ~ciaa.sdr;           /* get and invert scancode (keyboard is active low) */
 165         ciaa.cra |= 0x40;               /* switch SP pin to output for handshake */
 166         udelay(85);                     /* wait until 85 us have expired */
 167         ciaa.cra &= ~0x40;              /* switch CIA serial port to input mode */
 168
 169         down = !(scancode & 1);         /* lowest bit is release bit */
 170         scancode >>= 1;
 171
 172         if (scancode < 0x78) {          /* scancodes < 0x78 are keys */
 173
 174                 scancode = amikbd_keycode[scancode];
 175
 176                 input_regs(amikbd_dev, fp);
 177
 178                 if (scancode == KEY_CAPSLOCK) { /* CapsLock is a toggle switch key on Amiga */
 179                         input_report_key(amikbd_dev, scancode, 1);
 180                         input_report_key(amikbd_dev, scancode, 0);
 181                 } else {
 182                         input_report_key(amikbd_dev, scancode, down);
 183                 }
 184
 185                 input_sync(amikbd_dev);
 186         } else                          /* scancodes >= 0x78 are error codes */
 187                 printk(amikbd_messages[scancode - 0x78]);
 188
 189         return IRQ_HANDLED;
 190 }
 191
 192 static int __init amikbd_init(void)
 193 {
 194         int i;
 195
 196         if (!AMIGAHW_PRESENT(AMI_KEYBOARD))
 197                 return -EIO;
 198
 199         if (!request_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100, "amikeyb"))
 200                 return -EBUSY;
 201
 202         amikbd_dev = input_dev_allocate();
 203         if (!amikbd_dev) {
 204                 printk(KERN_ERR "amikbd: not enough memory for input device\n");
 205                 release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
 206                 return -ENOMEM;
 207         }
 208
 209         amikbd_dev->name = "Amiga Keyboard";
 210         amikbd_dev->phys = "amikbd/input0";
 211         amikbd_dev->id.bustype = BUS_AMIGA;
 212         amikbd_dev->id.vendor = 0x0001;
 213         amikbd_dev->id.product = 0x0001;
 214         amikbd_dev->id.version = 0x0100;
 215
 216         amikbd_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 217         amikbd_dev->keycode = amikbd_keycode;
 218         amikbd_dev->keycodesize = sizeof(unsigned char);
 219         amikbd_dev->keycodemax = ARRAY_SIZE(amikbd_keycode);
 220
 221         for (i = 0; i < 0x78; i++)
 222                 if (amikbd_keycode[i])
 223                         set_bit(amikbd_keycode[i], amikbd_dev->keybit);
 224
 225         ciaa.cra &= ~0x41;       /* serial data in, turn off TA */
 226         request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd", amikbd_interrupt);
 227
 228         input_register_device(amikbd_dev);
 229         return 0;
 230 }
 231
 232 static void __exit amikbd_exit(void)
 233 {
 234         free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
 235         input_unregister_device(amikbd_dev);
 236         release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
 237 }
 238
 239 module_init(amikbd_init);
 240 module_exit(amikbd_exit);