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
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/input.h>
  31 #include <linux/delay.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/keyboard.h>
  34 #include <linux/platform_device.h>
  35
  36 #include <asm/amigaints.h>
  37 #include <asm/amigahw.h>
  38 #include <asm/irq.h>
  39
  40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  41 MODULE_DESCRIPTION("Amiga keyboard driver");
  42 MODULE_LICENSE("GPL");
  43
  44 #ifdef CONFIG_HW_CONSOLE
  45 static unsigned char amikbd_keycode[0x78] __initdata = {
  46         [0]      = KEY_GRAVE,
  47         [1]      = KEY_1,
  48         [2]      = KEY_2,
  49         [3]      = KEY_3,
  50         [4]      = KEY_4,
  51         [5]      = KEY_5,
  52         [6]      = KEY_6,
  53         [7]      = KEY_7,
  54         [8]      = KEY_8,
  55         [9]      = KEY_9,
  56         [10]     = KEY_0,
  57         [11]     = KEY_MINUS,
  58         [12]     = KEY_EQUAL,
  59         [13]     = KEY_BACKSLASH,
  60         [15]     = KEY_KP0,
  61         [16]     = KEY_Q,
  62         [17]     = KEY_W,
  63         [18]     = KEY_E,
  64         [19]     = KEY_R,
  65         [20]     = KEY_T,
  66         [21]     = KEY_Y,
  67         [22]     = KEY_U,
  68         [23]     = KEY_I,
  69         [24]     = KEY_O,
  70         [25]     = KEY_P,
  71         [26]     = KEY_LEFTBRACE,
  72         [27]     = KEY_RIGHTBRACE,
  73         [29]     = KEY_KP1,
  74         [30]     = KEY_KP2,
  75         [31]     = KEY_KP3,
  76         [32]     = KEY_A,
  77         [33]     = KEY_S,
  78         [34]     = KEY_D,
  79         [35]     = KEY_F,
  80         [36]     = KEY_G,
  81         [37]     = KEY_H,
  82         [38]     = KEY_J,
  83         [39]     = KEY_K,
  84         [40]     = KEY_L,
  85         [41]     = KEY_SEMICOLON,
  86         [42]     = KEY_APOSTROPHE,
  87         [43]     = KEY_BACKSLASH,
  88         [45]     = KEY_KP4,
  89         [46]     = KEY_KP5,
  90         [47]     = KEY_KP6,
  91         [48]     = KEY_102ND,
  92         [49]     = KEY_Z,
  93         [50]     = KEY_X,
  94         [51]     = KEY_C,
  95         [52]     = KEY_V,
  96         [53]     = KEY_B,
  97         [54]     = KEY_N,
  98         [55]     = KEY_M,
  99         [56]     = KEY_COMMA,
 100         [57]     = KEY_DOT,
 101         [58]     = KEY_SLASH,
 102         [60]     = KEY_KPDOT,
 103         [61]     = KEY_KP7,
 104         [62]     = KEY_KP8,
 105         [63]     = KEY_KP9,
 106         [64]     = KEY_SPACE,
 107         [65]     = KEY_BACKSPACE,
 108         [66]     = KEY_TAB,
 109         [67]     = KEY_KPENTER,
 110         [68]     = KEY_ENTER,
 111         [69]     = KEY_ESC,
 112         [70]     = KEY_DELETE,
 113         [74]     = KEY_KPMINUS,
 114         [76]     = KEY_UP,
 115         [77]     = KEY_DOWN,
 116         [78]     = KEY_RIGHT,
 117         [79]     = KEY_LEFT,
 118         [80]     = KEY_F1,
 119         [81]     = KEY_F2,
 120         [82]     = KEY_F3,
 121         [83]     = KEY_F4,
 122         [84]     = KEY_F5,
 123         [85]     = KEY_F6,
 124         [86]     = KEY_F7,
 125         [87]     = KEY_F8,
 126         [88]     = KEY_F9,
 127         [89]     = KEY_F10,
 128         [90]     = KEY_KPLEFTPAREN,
 129         [91]     = KEY_KPRIGHTPAREN,
 130         [92]     = KEY_KPSLASH,
 131         [93]     = KEY_KPASTERISK,
 132         [94]     = KEY_KPPLUS,
 133         [95]     = KEY_HELP,
 134         [96]     = KEY_LEFTSHIFT,
 135         [97]     = KEY_RIGHTSHIFT,
 136         [98]     = KEY_CAPSLOCK,
 137         [99]     = KEY_LEFTCTRL,
 138         [100]    = KEY_LEFTALT,
 139         [101]    = KEY_RIGHTALT,
 140         [102]    = KEY_LEFTMETA,
 141         [103]    = KEY_RIGHTMETA
 142 };
 143
 144 static void __init amikbd_init_console_keymaps(void)
 145 {
 146         /* We can spare 512 bytes on stack for temp_map in init path. */
 147         unsigned short temp_map[NR_KEYS];
 148         int i, j;
 149
 150         for (i = 0; i < MAX_NR_KEYMAPS; i++) {
 151                 if (!key_maps[i])
 152                         continue;
 153                 memset(temp_map, 0, sizeof(temp_map));
 154                 for (j = 0; j < 0x78; j++) {
 155                         if (!amikbd_keycode[j])
 156                                 continue;
 157                         temp_map[j] = key_maps[i][amikbd_keycode[j]];
 158                 }
 159                 for (j = 0; j < NR_KEYS; j++) {
 160                         if (!temp_map[j])
 161                                 temp_map[j] = 0xf200;
 162                 }
 163                 memcpy(key_maps[i], temp_map, sizeof(temp_map));
 164         }
 165 }
 166 #else /* !CONFIG_HW_CONSOLE */
 167 static inline void amikbd_init_console_keymaps(void) {}
 168 #endif /* !CONFIG_HW_CONSOLE */
 169
 170 static const char *amikbd_messages[8] = {
 171         [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
 172         [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
 173         [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
 174         [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
 175         [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
 176         [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
 177         [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
 178         [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
 179 };
 180
 181 static irqreturn_t amikbd_interrupt(int irq, void *data)
 182 {
 183         struct input_dev *dev = data;
 184         unsigned char scancode, down;
 185
 186         scancode = ~ciaa.sdr;           /* get and invert scancode (keyboard is active low) */
 187         ciaa.cra |= 0x40;               /* switch SP pin to output for handshake */
 188         udelay(85);                     /* wait until 85 us have expired */
 189         ciaa.cra &= ~0x40;              /* switch CIA serial port to input mode */
 190
 191         down = !(scancode & 1);         /* lowest bit is release bit */
 192         scancode >>= 1;
 193
 194         if (scancode < 0x78) {          /* scancodes < 0x78 are keys */
 195                 if (scancode == 98) {   /* CapsLock is a toggle switch key on Amiga */
 196                         input_report_key(dev, scancode, 1);
 197                         input_report_key(dev, scancode, 0);
 198                 } else {
 199                         input_report_key(dev, scancode, down);
 200                 }
 201
 202                 input_sync(dev);
 203         } else                          /* scancodes >= 0x78 are error codes */
 204                 printk(amikbd_messages[scancode - 0x78]);
 205
 206         return IRQ_HANDLED;
 207 }
 208
 209 static int __init amikbd_probe(struct platform_device *pdev)
 210 {
 211         struct input_dev *dev;
 212         int i, err;
 213
 214         dev = input_allocate_device();
 215         if (!dev) {
 216                 dev_err(&pdev->dev, "Not enough memory for input device\n");
 217                 return -ENOMEM;
 218         }
 219
 220         dev->name = pdev->name;
 221         dev->phys = "amikbd/input0";
 222         dev->id.bustype = BUS_AMIGA;
 223         dev->id.vendor = 0x0001;
 224         dev->id.product = 0x0001;
 225         dev->id.version = 0x0100;
 226         dev->dev.parent = &pdev->dev;
 227
 228         dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 229
 230         for (i = 0; i < 0x78; i++)
 231                 set_bit(i, dev->keybit);
 232
 233         amikbd_init_console_keymaps();
 234
 235         ciaa.cra &= ~0x41;       /* serial data in, turn off TA */
 236         err = request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
 237                           dev);
 238         if (err)
 239                 goto fail2;
 240
 241         err = input_register_device(dev);
 242         if (err)
 243                 goto fail3;
 244
 245         platform_set_drvdata(pdev, dev);
 246
 247         return 0;
 248
 249  fail3: free_irq(IRQ_AMIGA_CIAA_SP, dev);
 250  fail2: input_free_device(dev);
 251         return err;
 252 }
 253
 254 static int __exit amikbd_remove(struct platform_device *pdev)
 255 {
 256         struct input_dev *dev = platform_get_drvdata(pdev);
 257
 258         free_irq(IRQ_AMIGA_CIAA_SP, dev);
 259         input_unregister_device(dev);
 260         return 0;
 261 }
 262
 263 static struct platform_driver amikbd_driver = {
 264         .remove = __exit_p(amikbd_remove),
 265         .driver   = {
 266                 .name   = "amiga-keyboard",
 267         },
 268 };
 269
 270 module_platform_driver_probe(amikbd_driver, amikbd_probe);
 271
 272 MODULE_ALIAS("platform:amiga-keyboard");