drivers/input/keyboard/amikbd.c

   1 /*
   2  *  Copyright (c) 2000-2001 Vojtech Pavlik
   3  *
   4  *  Based on the work of:
   5  *      Hamish Macdonald
   6  */
   7
   8 /*
   9  * Amiga keyboard driver for Linux/m68k
  10  */
  11
  12 /*
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26  *
  27  * Should you need to contact me, the author, you can do so either by
  28  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  29  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  30  */
  31
  32 #include <linux/module.h>
  33 #include <linux/init.h>
  34 #include <linux/input.h>
  35 #include <linux/delay.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/keyboard.h>
  38
  39 #include <asm/amigaints.h>
  40 #include <asm/amigahw.h>
  41 #include <asm/irq.h>
  42
  43 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  44 MODULE_DESCRIPTION("Amiga keyboard driver");
  45 MODULE_LICENSE("GPL");
  46
  47 static unsigned char amikbd_keycode[0x78] __initdata = {
  48         [0]      = KEY_GRAVE,
  49         [1]      = KEY_1,
  50         [2]      = KEY_2,
  51         [3]      = KEY_3,
  52         [4]      = KEY_4,
  53         [5]      = KEY_5,
  54         [6]      = KEY_6,
  55         [7]      = KEY_7,
  56         [8]      = KEY_8,
  57         [9]      = KEY_9,
  58         [10]     = KEY_0,
  59         [11]     = KEY_MINUS,
  60         [12]     = KEY_EQUAL,
  61         [13]     = KEY_BACKSLASH,
  62         [15]     = KEY_KP0,
  63         [16]     = KEY_Q,
  64         [17]     = KEY_W,
  65         [18]     = KEY_E,
  66         [19]     = KEY_R,
  67         [20]     = KEY_T,
  68         [21]     = KEY_Y,
  69         [22]     = KEY_U,
  70         [23]     = KEY_I,
  71         [24]     = KEY_O,
  72         [25]     = KEY_P,
  73         [26]     = KEY_LEFTBRACE,
  74         [27]     = KEY_RIGHTBRACE,
  75         [29]     = KEY_KP1,
  76         [30]     = KEY_KP2,
  77         [31]     = KEY_KP3,
  78         [32]     = KEY_A,
  79         [33]     = KEY_S,
  80         [34]     = KEY_D,
  81         [35]     = KEY_F,
  82         [36]     = KEY_G,
  83         [37]     = KEY_H,
  84         [38]     = KEY_J,
  85         [39]     = KEY_K,
  86         [40]     = KEY_L,
  87         [41]     = KEY_SEMICOLON,
  88         [42]     = KEY_APOSTROPHE,
  89         [43]     = KEY_BACKSLASH,
  90         [45]     = KEY_KP4,
  91         [46]     = KEY_KP5,
  92         [47]     = KEY_KP6,
  93         [48]     = KEY_102ND,
  94         [49]     = KEY_Z,
  95         [50]     = KEY_X,
  96         [51]     = KEY_C,
  97         [52]     = KEY_V,
  98         [53]     = KEY_B,
  99         [54]     = KEY_N,
 100         [55]     = KEY_M,
 101         [56]     = KEY_COMMA,
 102         [57]     = KEY_DOT,
 103         [58]     = KEY_SLASH,
 104         [60]     = KEY_KPDOT,
 105         [61]     = KEY_KP7,
 106         [62]     = KEY_KP8,
 107         [63]     = KEY_KP9,
 108         [64]     = KEY_SPACE,
 109         [65]     = KEY_BACKSPACE,
 110         [66]     = KEY_TAB,
 111         [67]     = KEY_KPENTER,
 112         [68]     = KEY_ENTER,
 113         [69]     = KEY_ESC,
 114         [70]     = KEY_DELETE,
 115         [74]     = KEY_KPMINUS,
 116         [76]     = KEY_UP,
 117         [77]     = KEY_DOWN,
 118         [78]     = KEY_RIGHT,
 119         [79]     = KEY_LEFT,
 120         [80]     = KEY_F1,
 121         [81]     = KEY_F2,
 122         [82]     = KEY_F3,
 123         [83]     = KEY_F4,
 124         [84]     = KEY_F5,
 125         [85]     = KEY_F6,
 126         [86]     = KEY_F7,
 127         [87]     = KEY_F8,
 128         [88]     = KEY_F9,
 129         [89]     = KEY_F10,
 130         [90]     = KEY_KPLEFTPAREN,
 131         [91]     = KEY_KPRIGHTPAREN,
 132         [92]     = KEY_KPSLASH,
 133         [93]     = KEY_KPASTERISK,
 134         [94]     = KEY_KPPLUS,
 135         [95]     = KEY_HELP,
 136         [96]     = KEY_LEFTSHIFT,
 137         [97]     = KEY_RIGHTSHIFT,
 138         [98]     = KEY_CAPSLOCK,
 139         [99]     = KEY_LEFTCTRL,
 140         [100]    = KEY_LEFTALT,
 141         [101]    = KEY_RIGHTALT,
 142         [102]    = KEY_LEFTMETA,
 143         [103]    = KEY_RIGHTMETA
 144 };
 145
 146 static const char *amikbd_messages[8] = {
 147         [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
 148         [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
 149         [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
 150         [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
 151         [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
 152         [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
 153         [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
 154         [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
 155 };
 156
 157 static struct input_dev *amikbd_dev;
 158
 159 static irqreturn_t amikbd_interrupt(int irq, void *dummy)
 160 {
 161         unsigned char scancode, down;
 162
 163         scancode = ~ciaa.sdr;           /* get and invert scancode (keyboard is active low) */
 164         ciaa.cra |= 0x40;               /* switch SP pin to output for handshake */
 165         udelay(85);                     /* wait until 85 us have expired */
 166         ciaa.cra &= ~0x40;              /* switch CIA serial port to input mode */
 167
 168         down = !(scancode & 1);         /* lowest bit is release bit */
 169         scancode >>= 1;
 170
 171         if (scancode < 0x78) {          /* scancodes < 0x78 are keys */
 172                 if (scancode == 98) {   /* CapsLock is a toggle switch key on Amiga */
 173                         input_report_key(amikbd_dev, scancode, 1);
 174                         input_report_key(amikbd_dev, scancode, 0);
 175                 } else {
 176                         input_report_key(amikbd_dev, scancode, down);
 177                 }
 178
 179                 input_sync(amikbd_dev);
 180         } else                          /* scancodes >= 0x78 are error codes */
 181                 printk(amikbd_messages[scancode - 0x78]);
 182
 183         return IRQ_HANDLED;
 184 }
 185
 186 static int __init amikbd_init(void)
 187 {
 188         int i, j, err;
 189
 190         if (!AMIGAHW_PRESENT(AMI_KEYBOARD))
 191                 return -ENODEV;
 192
 193         if (!request_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100, "amikeyb"))
 194                 return -EBUSY;
 195
 196         amikbd_dev = input_allocate_device();
 197         if (!amikbd_dev) {
 198                 printk(KERN_ERR "amikbd: not enough memory for input device\n");
 199                 err = -ENOMEM;
 200                 goto fail1;
 201         }
 202
 203         amikbd_dev->name = "Amiga Keyboard";
 204         amikbd_dev->phys = "amikbd/input0";
 205         amikbd_dev->id.bustype = BUS_AMIGA;
 206         amikbd_dev->id.vendor = 0x0001;
 207         amikbd_dev->id.product = 0x0001;
 208         amikbd_dev->id.version = 0x0100;
 209
 210         amikbd_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 211
 212         for (i = 0; i < 0x78; i++)
 213                 set_bit(i, amikbd_dev->keybit);
 214
 215         for (i = 0; i < MAX_NR_KEYMAPS; i++) {
 216                 static u_short temp_map[NR_KEYS] __initdata;
 217                 if (!key_maps[i])
 218                         continue;
 219                 memset(temp_map, 0, sizeof(temp_map));
 220                 for (j = 0; j < 0x78; j++) {
 221                         if (!amikbd_keycode[j])
 222                                 continue;
 223                         temp_map[j] = key_maps[i][amikbd_keycode[j]];
 224                 }
 225                 for (j = 0; j < NR_KEYS; j++) {
 226                         if (!temp_map[j])
 227                                 temp_map[j] = 0xf200;
 228                 }
 229                 memcpy(key_maps[i], temp_map, sizeof(temp_map));
 230         }
 231         ciaa.cra &= ~0x41;       /* serial data in, turn off TA */
 232         if (request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
 233                         amikbd_interrupt)) {
 234                 err = -EBUSY;
 235                 goto fail2;
 236         }
 237
 238         err = input_register_device(amikbd_dev);
 239         if (err)
 240                 goto fail3;
 241
 242         return 0;
 243
 244  fail3: free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
 245  fail2: input_free_device(amikbd_dev);
 246  fail1: release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
 247         return err;
 248 }
 249
 250 static void __exit amikbd_exit(void)
 251 {
 252         free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
 253         input_unregister_device(amikbd_dev);
 254         release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
 255 }
 256
 257 module_init(amikbd_init);
 258 module_exit(amikbd_exit);