drivers/input/keyboard/amikbd.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 2000-2001 Vojtech Pavlik
   4  *
   5  *  Based on the work of:
   6  *      Hamish Macdonald
   7  */
   8
   9 /*
  10  * Amiga keyboard driver for Linux/m68k
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/input.h>
  16 #include <linux/delay.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/keyboard.h>
  19 #include <linux/platform_device.h>
  20
  21 #include <asm/amigaints.h>
  22 #include <asm/amigahw.h>
  23 #include <asm/irq.h>
  24
  25 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  26 MODULE_DESCRIPTION("Amiga keyboard driver");
  27 MODULE_LICENSE("GPL");
  28
  29 #ifdef CONFIG_VT
  30 static unsigned char amikbd_keycode[0x78] __initdata = {
  31         [0]      = KEY_GRAVE,
  32         [1]      = KEY_1,
  33         [2]      = KEY_2,
  34         [3]      = KEY_3,
  35         [4]      = KEY_4,
  36         [5]      = KEY_5,
  37         [6]      = KEY_6,
  38         [7]      = KEY_7,
  39         [8]      = KEY_8,
  40         [9]      = KEY_9,
  41         [10]     = KEY_0,
  42         [11]     = KEY_MINUS,
  43         [12]     = KEY_EQUAL,
  44         [13]     = KEY_BACKSLASH,
  45         [15]     = KEY_KP0,
  46         [16]     = KEY_Q,
  47         [17]     = KEY_W,
  48         [18]     = KEY_E,
  49         [19]     = KEY_R,
  50         [20]     = KEY_T,
  51         [21]     = KEY_Y,
  52         [22]     = KEY_U,
  53         [23]     = KEY_I,
  54         [24]     = KEY_O,
  55         [25]     = KEY_P,
  56         [26]     = KEY_LEFTBRACE,
  57         [27]     = KEY_RIGHTBRACE,
  58         [29]     = KEY_KP1,
  59         [30]     = KEY_KP2,
  60         [31]     = KEY_KP3,
  61         [32]     = KEY_A,
  62         [33]     = KEY_S,
  63         [34]     = KEY_D,
  64         [35]     = KEY_F,
  65         [36]     = KEY_G,
  66         [37]     = KEY_H,
  67         [38]     = KEY_J,
  68         [39]     = KEY_K,
  69         [40]     = KEY_L,
  70         [41]     = KEY_SEMICOLON,
  71         [42]     = KEY_APOSTROPHE,
  72         [43]     = KEY_BACKSLASH,
  73         [45]     = KEY_KP4,
  74         [46]     = KEY_KP5,
  75         [47]     = KEY_KP6,
  76         [48]     = KEY_102ND,
  77         [49]     = KEY_Z,
  78         [50]     = KEY_X,
  79         [51]     = KEY_C,
  80         [52]     = KEY_V,
  81         [53]     = KEY_B,
  82         [54]     = KEY_N,
  83         [55]     = KEY_M,
  84         [56]     = KEY_COMMA,
  85         [57]     = KEY_DOT,
  86         [58]     = KEY_SLASH,
  87         [60]     = KEY_KPDOT,
  88         [61]     = KEY_KP7,
  89         [62]     = KEY_KP8,
  90         [63]     = KEY_KP9,
  91         [64]     = KEY_SPACE,
  92         [65]     = KEY_BACKSPACE,
  93         [66]     = KEY_TAB,
  94         [67]     = KEY_KPENTER,
  95         [68]     = KEY_ENTER,
  96         [69]     = KEY_ESC,
  97         [70]     = KEY_DELETE,
  98         [74]     = KEY_KPMINUS,
  99         [76]     = KEY_UP,
 100         [77]     = KEY_DOWN,
 101         [78]     = KEY_RIGHT,
 102         [79]     = KEY_LEFT,
 103         [80]     = KEY_F1,
 104         [81]     = KEY_F2,
 105         [82]     = KEY_F3,
 106         [83]     = KEY_F4,
 107         [84]     = KEY_F5,
 108         [85]     = KEY_F6,
 109         [86]     = KEY_F7,
 110         [87]     = KEY_F8,
 111         [88]     = KEY_F9,
 112         [89]     = KEY_F10,
 113         [90]     = KEY_KPLEFTPAREN,
 114         [91]     = KEY_KPRIGHTPAREN,
 115         [92]     = KEY_KPSLASH,
 116         [93]     = KEY_KPASTERISK,
 117         [94]     = KEY_KPPLUS,
 118         [95]     = KEY_HELP,
 119         [96]     = KEY_LEFTSHIFT,
 120         [97]     = KEY_RIGHTSHIFT,
 121         [98]     = KEY_CAPSLOCK,
 122         [99]     = KEY_LEFTCTRL,
 123         [100]    = KEY_LEFTALT,
 124         [101]    = KEY_RIGHTALT,
 125         [102]    = KEY_LEFTMETA,
 126         [103]    = KEY_RIGHTMETA
 127 };
 128
 129 static void __init amikbd_init_console_keymaps(void)
 130 {
 131         /* We can spare 512 bytes on stack for temp_map in init path. */
 132         unsigned short temp_map[NR_KEYS];
 133         int i, j;
 134
 135         for (i = 0; i < MAX_NR_KEYMAPS; i++) {
 136                 if (!key_maps[i])
 137                         continue;
 138                 memset(temp_map, 0, sizeof(temp_map));
 139                 for (j = 0; j < 0x78; j++) {
 140                         if (!amikbd_keycode[j])
 141                                 continue;
 142                         temp_map[j] = key_maps[i][amikbd_keycode[j]];
 143                 }
 144                 for (j = 0; j < NR_KEYS; j++) {
 145                         if (!temp_map[j])
 146                                 temp_map[j] = 0xf200;
 147                 }
 148                 memcpy(key_maps[i], temp_map, sizeof(temp_map));
 149         }
 150 }
 151 #else /* !CONFIG_VT */
 152 static inline void amikbd_init_console_keymaps(void) {}
 153 #endif /* !CONFIG_VT */
 154
 155 static const char *amikbd_messages[8] = {
 156         [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
 157         [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
 158         [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
 159         [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
 160         [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
 161         [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
 162         [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
 163         [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
 164 };
 165
 166 static irqreturn_t amikbd_interrupt(int irq, void *data)
 167 {
 168         struct input_dev *dev = data;
 169         unsigned char scancode, down;
 170
 171         scancode = ~ciaa.sdr;           /* get and invert scancode (keyboard is active low) */
 172         ciaa.cra |= 0x40;               /* switch SP pin to output for handshake */
 173         udelay(85);                     /* wait until 85 us have expired */
 174         ciaa.cra &= ~0x40;              /* switch CIA serial port to input mode */
 175
 176         down = !(scancode & 1);         /* lowest bit is release bit */
 177         scancode >>= 1;
 178
 179         if (scancode < 0x78) {          /* scancodes < 0x78 are keys */
 180                 if (scancode == 98) {   /* CapsLock is a toggle switch key on Amiga */
 181                         input_report_key(dev, scancode, 1);
 182                         input_report_key(dev, scancode, 0);
 183                 } else {
 184                         input_report_key(dev, scancode, down);
 185                 }
 186
 187                 input_sync(dev);
 188         } else                          /* scancodes >= 0x78 are error codes */
 189                 printk(amikbd_messages[scancode - 0x78]);
 190
 191         return IRQ_HANDLED;
 192 }
 193
 194 static int __init amikbd_probe(struct platform_device *pdev)
 195 {
 196         struct input_dev *dev;
 197         int i, err;
 198
 199         dev = devm_input_allocate_device(&pdev->dev);
 200         if (!dev) {
 201                 dev_err(&pdev->dev, "Not enough memory for input device\n");
 202                 return -ENOMEM;
 203         }
 204
 205         dev->name = pdev->name;
 206         dev->phys = "amikbd/input0";
 207         dev->id.bustype = BUS_AMIGA;
 208         dev->id.vendor = 0x0001;
 209         dev->id.product = 0x0001;
 210         dev->id.version = 0x0100;
 211
 212         dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 213
 214         for (i = 0; i < 0x78; i++)
 215                 set_bit(i, dev->keybit);
 216
 217         amikbd_init_console_keymaps();
 218
 219         ciaa.cra &= ~0x41;       /* serial data in, turn off TA */
 220         err = devm_request_irq(&pdev->dev, IRQ_AMIGA_CIAA_SP, amikbd_interrupt,
 221                                0, "amikbd", dev);
 222         if (err)
 223                 return err;
 224
 225         err = input_register_device(dev);
 226         if (err)
 227                 return err;
 228
 229         platform_set_drvdata(pdev, dev);
 230
 231         return 0;
 232 }
 233
 234 static struct platform_driver amikbd_driver = {
 235         .driver   = {
 236                 .name   = "amiga-keyboard",
 237         },
 238 };
 239
 240 module_platform_driver_probe(amikbd_driver, amikbd_probe);
 241
 242 MODULE_ALIAS("platform:amiga-keyboard");