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
  48#ifdef CONFIG_HW_CONSOLE
  49static 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
 148static void __init amikbd_init_console_keymaps(void)
 149{
 150        /* We can spare 512 bytes on stack for temp_map in init path. */
 151        unsigned short temp_map[NR_KEYS];
 152        int i, j;
 153
 154        for (i = 0; i < MAX_NR_KEYMAPS; i++) {
 155                if (!key_maps[i])
 156                        continue;
 157                memset(temp_map, 0, sizeof(temp_map));
 158                for (j = 0; j < 0x78; j++) {
 159                        if (!amikbd_keycode[j])
 160                                continue;
 161                        temp_map[j] = key_maps[i][amikbd_keycode[j]];
 162                }
 163                for (j = 0; j < NR_KEYS; j++) {
 164                        if (!temp_map[j])
 165                                temp_map[j] = 0xf200;
 166                }
 167                memcpy(key_maps[i], temp_map, sizeof(temp_map));
 168        }
 169}
 170#else /* !CONFIG_HW_CONSOLE */
 171static inline void amikbd_init_console_keymaps(void) {}
 172#endif /* !CONFIG_HW_CONSOLE */
 173
 174static const char *amikbd_messages[8] = {
 175        [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
 176        [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
 177        [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
 178        [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
 179        [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
 180        [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
 181        [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
 182        [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
 183};
 184
 185static irqreturn_t amikbd_interrupt(int irq, void *data)
 186{
 187        struct input_dev *dev = data;
 188        unsigned char scancode, down;
 189
 190        scancode = ~ciaa.sdr;           /* get and invert scancode (keyboard is active low) */
 191        ciaa.cra |= 0x40;               /* switch SP pin to output for handshake */
 192        udelay(85);                     /* wait until 85 us have expired */
 193        ciaa.cra &= ~0x40;              /* switch CIA serial port to input mode */
 194
 195        down = !(scancode & 1);         /* lowest bit is release bit */
 196        scancode >>= 1;
 197
 198        if (scancode < 0x78) {          /* scancodes < 0x78 are keys */
 199                if (scancode == 98) {   /* CapsLock is a toggle switch key on Amiga */
 200                        input_report_key(dev, scancode, 1);
 201                        input_report_key(dev, scancode, 0);
 202                } else {
 203                        input_report_key(dev, scancode, down);
 204                }
 205
 206                input_sync(dev);
 207        } else                          /* scancodes >= 0x78 are error codes */
 208                printk(amikbd_messages[scancode - 0x78]);
 209
 210        return IRQ_HANDLED;
 211}
 212
 213static int __init amikbd_probe(struct platform_device *pdev)
 214{
 215        struct input_dev *dev;
 216        int i, err;
 217
 218        dev = input_allocate_device();
 219        if (!dev) {
 220                dev_err(&pdev->dev, "Not enough memory for input device\n");
 221                return -ENOMEM;
 222        }
 223
 224        dev->name = pdev->name;
 225        dev->phys = "amikbd/input0";
 226        dev->id.bustype = BUS_AMIGA;
 227        dev->id.vendor = 0x0001;
 228        dev->id.product = 0x0001;
 229        dev->id.version = 0x0100;
 230        dev->dev.parent = &pdev->dev;
 231
 232        dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 233
 234        for (i = 0; i < 0x78; i++)
 235                set_bit(i, dev->keybit);
 236
 237        amikbd_init_console_keymaps();
 238
 239        ciaa.cra &= ~0x41;       /* serial data in, turn off TA */
 240        err = request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
 241                          dev);
 242        if (err)
 243                goto fail2;
 244
 245        err = input_register_device(dev);
 246        if (err)
 247                goto fail3;
 248
 249        platform_set_drvdata(pdev, dev);
 250
 251        return 0;
 252
 253 fail3: free_irq(IRQ_AMIGA_CIAA_SP, dev);
 254 fail2: input_free_device(dev);
 255        return err;
 256}
 257
 258static int __exit amikbd_remove(struct platform_device *pdev)
 259{
 260        struct input_dev *dev = platform_get_drvdata(pdev);
 261
 262        free_irq(IRQ_AMIGA_CIAA_SP, dev);
 263        input_unregister_device(dev);
 264        return 0;
 265}
 266
 267static struct platform_driver amikbd_driver = {
 268        .remove = __exit_p(amikbd_remove),
 269        .driver   = {
 270                .name   = "amiga-keyboard",
 271        },
 272};
 273
 274module_platform_driver_probe(amikbd_driver, amikbd_probe);
 275
 276MODULE_ALIAS("platform:amiga-keyboard");
 277