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
  44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  45 MODULE_DESCRIPTION("Amiga keyboard driver");
  46 MODULE_LICENSE("GPL");
  47
  48 #ifdef CONFIG_HW_CONSOLE
  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 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 */
 171 static inline void amikbd_init_console_keymaps(void) {}
 172 #endif /* !CONFIG_HW_CONSOLE */
 173
 174 static 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
 185 static 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
 213 static 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
 258 static 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
 267 static struct platform_driver amikbd_driver = {
 268         .remove = __exit_p(amikbd_remove),
 269         .driver   = {
 270                 .name   = "amiga-keyboard",
 271         },
 272 };
 273
 274 module_platform_driver_probe(amikbd_driver, amikbd_probe);
 275
 276 MODULE_ALIAS("platform:amiga-keyboard");