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 #include <linux/keyboard.h>
  40
  41 #include <asm/amigaints.h>
  42 #include <asm/amigahw.h>
  43 #include <asm/irq.h>
  44
  45 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  46 MODULE_DESCRIPTION("Amiga keyboard driver");
  47 MODULE_LICENSE("GPL");
  48
  49 static unsigned char amikbd_keycode[0x78] __initdata = {
  50         [0]      = KEY_GRAVE,
  51         [1]      = KEY_1,
  52         [2]      = KEY_2,
  53         [3]      = KEY_3,
  54         [4]      = KEY_4,
  55         [5]      = KEY_5,
  56         [6]      = KEY_6,
  57         [7]      = KEY_7,
  58         [8]      = KEY_8,
  59         [9]      = KEY_9,
  60         [10]     = KEY_0,
  61         [11]     = KEY_MINUS,
  62         [12]     = KEY_EQUAL,
  63         [13]     = KEY_BACKSLASH,
  64         [15]     = KEY_KP0,
  65         [16]     = KEY_Q,
  66         [17]     = KEY_W,
  67         [18]     = KEY_E,
  68         [19]     = KEY_R,
  69         [20]     = KEY_T,
  70         [21]     = KEY_Y,
  71         [22]     = KEY_U,
  72         [23]     = KEY_I,
  73         [24]     = KEY_O,
  74         [25]     = KEY_P,
  75         [26]     = KEY_LEFTBRACE,
  76         [27]     = KEY_RIGHTBRACE,
  77         [29]     = KEY_KP1,
  78         [30]     = KEY_KP2,
  79         [31]     = KEY_KP3,
  80         [32]     = KEY_A,
  81         [33]     = KEY_S,
  82         [34]     = KEY_D,
  83         [35]     = KEY_F,
  84         [36]     = KEY_G,
  85         [37]     = KEY_H,
  86         [38]     = KEY_J,
  87         [39]     = KEY_K,
  88         [40]     = KEY_L,
  89         [41]     = KEY_SEMICOLON,
  90         [42]     = KEY_APOSTROPHE,
  91         [43]     = KEY_BACKSLASH,
  92         [45]     = KEY_KP4,
  93         [46]     = KEY_KP5,
  94         [47]     = KEY_KP6,
  95         [48]     = KEY_102ND,
  96         [49]     = KEY_Z,
  97         [50]     = KEY_X,
  98         [51]     = KEY_C,
  99         [52]     = KEY_V,
 100         [53]     = KEY_B,
 101         [54]     = KEY_N,
 102         [55]     = KEY_M,
 103         [56]     = KEY_COMMA,
 104         [57]     = KEY_DOT,
 105         [58]     = KEY_SLASH,
 106         [60]     = KEY_KPDOT,
 107         [61]     = KEY_KP7,
 108         [62]     = KEY_KP8,
 109         [63]     = KEY_KP9,
 110         [64]     = KEY_SPACE,
 111         [65]     = KEY_BACKSPACE,
 112         [66]     = KEY_TAB,
 113         [67]     = KEY_KPENTER,
 114         [68]     = KEY_ENTER,
 115         [69]     = KEY_ESC,
 116         [70]     = KEY_DELETE,
 117         [74]     = KEY_KPMINUS,
 118         [76]     = KEY_UP,
 119         [77]     = KEY_DOWN,
 120         [78]     = KEY_RIGHT,
 121         [79]     = KEY_LEFT,
 122         [80]     = KEY_F1,
 123         [81]     = KEY_F2,
 124         [82]     = KEY_F3,
 125         [83]     = KEY_F4,
 126         [84]     = KEY_F5,
 127         [85]     = KEY_F6,
 128         [86]     = KEY_F7,
 129         [87]     = KEY_F8,
 130         [88]     = KEY_F9,
 131         [89]     = KEY_F10,
 132         [90]     = KEY_KPLEFTPAREN,
 133         [91]     = KEY_KPRIGHTPAREN,
 134         [92]     = KEY_KPSLASH,
 135         [93]     = KEY_KPASTERISK,
 136         [94]     = KEY_KPPLUS,
 137         [95]     = KEY_HELP,
 138         [96]     = KEY_LEFTSHIFT,
 139         [97]     = KEY_RIGHTSHIFT,
 140         [98]     = KEY_CAPSLOCK,
 141         [99]     = KEY_LEFTCTRL,
 142         [100]    = KEY_LEFTALT,
 143         [101]    = KEY_RIGHTALT,
 144         [102]    = KEY_LEFTMETA,
 145         [103]    = KEY_RIGHTMETA
 146 };
 147
 148 static const char *amikbd_messages[8] = {
 149         [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
 150         [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
 151         [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
 152         [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
 153         [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
 154         [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
 155         [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
 156         [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
 157 };
 158
 159 static struct input_dev *amikbd_dev;
 160
 161 static irqreturn_t amikbd_interrupt(int irq, void *dummy)
 162 {
 163         unsigned char scancode, down;
 164
 165         scancode = ~ciaa.sdr;           /* get and invert scancode (keyboard is active low) */
 166         ciaa.cra |= 0x40;               /* switch SP pin to output for handshake */
 167         udelay(85);                     /* wait until 85 us have expired */
 168         ciaa.cra &= ~0x40;              /* switch CIA serial port to input mode */
 169
 170         down = !(scancode & 1);         /* lowest bit is release bit */
 171         scancode >>= 1;
 172
 173         if (scancode < 0x78) {          /* scancodes < 0x78 are keys */
 174                 if (scancode == 98) {   /* CapsLock is a toggle switch key on Amiga */
 175                         input_report_key(amikbd_dev, scancode, 1);
 176                         input_report_key(amikbd_dev, scancode, 0);
 177                 } else {
 178                         input_report_key(amikbd_dev, scancode, down);
 179                 }
 180
 181                 input_sync(amikbd_dev);
 182         } else                          /* scancodes >= 0x78 are error codes */
 183                 printk(amikbd_messages[scancode - 0x78]);
 184
 185         return IRQ_HANDLED;
 186 }
 187
 188 static int __init amikbd_init(void)
 189 {
 190         int i, j, err;
 191
 192         if (!AMIGAHW_PRESENT(AMI_KEYBOARD))
 193                 return -ENODEV;
 194
 195         if (!request_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100, "amikeyb"))
 196                 return -EBUSY;
 197
 198         amikbd_dev = input_allocate_device();
 199         if (!amikbd_dev) {
 200                 printk(KERN_ERR "amikbd: not enough memory for input device\n");
 201                 err = -ENOMEM;
 202                 goto fail1;
 203         }
 204
 205         amikbd_dev->name = "Amiga Keyboard";
 206         amikbd_dev->phys = "amikbd/input0";
 207         amikbd_dev->id.bustype = BUS_AMIGA;
 208         amikbd_dev->id.vendor = 0x0001;
 209         amikbd_dev->id.product = 0x0001;
 210         amikbd_dev->id.version = 0x0100;
 211
 212         amikbd_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 213
 214         for (i = 0; i < 0x78; i++)
 215                 set_bit(i, amikbd_dev->keybit);
 216
 217         for (i = 0; i < MAX_NR_KEYMAPS; i++) {
 218                 static u_short temp_map[NR_KEYS] __initdata;
 219                 if (!key_maps[i])
 220                         continue;
 221                 memset(temp_map, 0, sizeof(temp_map));
 222                 for (j = 0; j < 0x78; j++) {
 223                         if (!amikbd_keycode[j])
 224                                 continue;
 225                         temp_map[j] = key_maps[i][amikbd_keycode[j]];
 226                 }
 227                 for (j = 0; j < NR_KEYS; j++) {
 228                         if (!temp_map[j])
 229                                 temp_map[j] = 0xf200;
 230                 }
 231                 memcpy(key_maps[i], temp_map, sizeof(temp_map));
 232         }
 233         ciaa.cra &= ~0x41;       /* serial data in, turn off TA */
 234         if (request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
 235                         amikbd_interrupt)) {
 236                 err = -EBUSY;
 237                 goto fail2;
 238         }
 239
 240         err = input_register_device(amikbd_dev);
 241         if (err)
 242                 goto fail3;
 243
 244         return 0;
 245
 246  fail3: free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
 247  fail2: input_free_device(amikbd_dev);
 248  fail1: release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
 249         return err;
 250 }
 251
 252 static void __exit amikbd_exit(void)
 253 {
 254         free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
 255         input_unregister_device(amikbd_dev);
 256         release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
 257 }
 258
 259 module_init(amikbd_init);
 260 module_exit(amikbd_exit);