LXR linux/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#include <linux/platform_device.h>
  39
  40#include <asm/amigaints.h>
  41#include <asm/amigahw.h>
  42#include <asm/irq.h>
  43
  44MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  45MODULE_DESCRIPTION("Amiga keyboard driver");
  46MODULE_LICENSE("GPL");
  47
  48static unsigned char amikbd_keycode[0x78] __initdata = {
  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
 147static 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
 158static irqreturn_t amikbd_interrupt(int irq, void *data)
 159{
 160        struct input_dev *dev = data;
 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(dev, scancode, 1);
 174                        input_report_key(dev, scancode, 0);
 175                } else {
 176                        input_report_key(dev, scancode, down);
 177                }
 178
 179                input_sync(dev);
 180        } else                          /* scancodes >= 0x78 are error codes */
 181                printk(amikbd_messages[scancode - 0x78]);
 182
 183        return IRQ_HANDLED;
 184}
 185
 186static int __init amikbd_probe(struct platform_device *pdev)
 187{
 188        struct input_dev *dev;
 189        int i, j, err;
 190
 191        dev = input_allocate_device();
 192        if (!dev) {
 193                dev_err(&pdev->dev, "Not enough memory for input device\n");
 194                return -ENOMEM;
 195        }
 196
 197        dev->name = pdev->name;
 198        dev->phys = "amikbd/input0";
 199        dev->id.bustype = BUS_AMIGA;
 200        dev->id.vendor = 0x0001;
 201        dev->id.product = 0x0001;
 202        dev->id.version = 0x0100;
 203        dev->dev.parent = &pdev->dev;
 204
 205        dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 206
 207        for (i = 0; i < 0x78; i++)
 208                set_bit(i, dev->keybit);
 209
 210        for (i = 0; i < MAX_NR_KEYMAPS; i++) {
 211                static u_short temp_map[NR_KEYS] __initdata;
 212                if (!key_maps[i])
 213                        continue;
 214                memset(temp_map, 0, sizeof(temp_map));
 215                for (j = 0; j < 0x78; j++) {
 216                        if (!amikbd_keycode[j])
 217                                continue;
 218                        temp_map[j] = key_maps[i][amikbd_keycode[j]];
 219                }
 220                for (j = 0; j < NR_KEYS; j++) {
 221                        if (!temp_map[j])
 222                                temp_map[j] = 0xf200;
 223                }
 224                memcpy(key_maps[i], temp_map, sizeof(temp_map));
 225        }
 226        ciaa.cra &= ~0x41;       /* serial data in, turn off TA */
 227        err = request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
 228                          dev);
 229        if (err)
 230                goto fail2;
 231
 232        err = input_register_device(dev);
 233        if (err)
 234                goto fail3;
 235
 236        platform_set_drvdata(pdev, dev);
 237
 238        return 0;
 239
 240 fail3: free_irq(IRQ_AMIGA_CIAA_SP, dev);
 241 fail2: input_free_device(dev);
 242        return err;
 243}
 244
 245static int __exit amikbd_remove(struct platform_device *pdev)
 246{
 247        struct input_dev *dev = platform_get_drvdata(pdev);
 248
 249        platform_set_drvdata(pdev, NULL);
 250        free_irq(IRQ_AMIGA_CIAA_SP, dev);
 251        input_unregister_device(dev);
 252        return 0;
 253}
 254
 255static struct platform_driver amikbd_driver = {
 256        .remove = __exit_p(amikbd_remove),
 257        .driver   = {
 258                .name   = "amiga-keyboard",
 259                .owner  = THIS_MODULE,
 260        },
 261};
 262
 263module_platform_driver_probe(amikbd_driver, amikbd_probe);
 264
 265MODULE_ALIAS("platform:amiga-keyboard");
 266