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 /*
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/init.h>
  18 #include <linux/input.h>
  19 #include <linux/delay.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/keyboard.h>
  22 #include <linux/platform_device.h>
  23
  24 #include <asm/amigaints.h>
  25 #include <asm/amigahw.h>
  26 #include <asm/irq.h>
  27
  28 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  29 MODULE_DESCRIPTION("Amiga keyboard driver");
  30 MODULE_LICENSE("GPL");
  31
  32 #ifdef CONFIG_HW_CONSOLE
  33 static unsigned char amikbd_keycode[0x78] __initdata = {
  34         [0]      = KEY_GRAVE,
  35         [1]      = KEY_1,
  36         [2]      = KEY_2,
  37         [3]      = KEY_3,
  38         [4]      = KEY_4,
  39         [5]      = KEY_5,
  40         [6]      = KEY_6,
  41         [7]      = KEY_7,
  42         [8]      = KEY_8,
  43         [9]      = KEY_9,
  44         [10]     = KEY_0,
  45         [11]     = KEY_MINUS,
  46         [12]     = KEY_EQUAL,
  47         [13]     = KEY_BACKSLASH,
  48         [15]     = KEY_KP0,
  49         [16]     = KEY_Q,
  50         [17]     = KEY_W,
  51         [18]     = KEY_E,
  52         [19]     = KEY_R,
  53         [20]     = KEY_T,
  54         [21]     = KEY_Y,
  55         [22]     = KEY_U,
  56         [23]     = KEY_I,
  57         [24]     = KEY_O,
  58         [25]     = KEY_P,
  59         [26]     = KEY_LEFTBRACE,
  60         [27]     = KEY_RIGHTBRACE,
  61         [29]     = KEY_KP1,
  62         [30]     = KEY_KP2,
  63         [31]     = KEY_KP3,
  64         [32]     = KEY_A,
  65         [33]     = KEY_S,
  66         [34]     = KEY_D,
  67         [35]     = KEY_F,
  68         [36]     = KEY_G,
  69         [37]     = KEY_H,
  70         [38]     = KEY_J,
  71         [39]     = KEY_K,
  72         [40]     = KEY_L,
  73         [41]     = KEY_SEMICOLON,
  74         [42]     = KEY_APOSTROPHE,
  75         [43]     = KEY_BACKSLASH,
  76         [45]     = KEY_KP4,
  77         [46]     = KEY_KP5,
  78         [47]     = KEY_KP6,
  79         [48]     = KEY_102ND,
  80         [49]     = KEY_Z,
  81         [50]     = KEY_X,
  82         [51]     = KEY_C,
  83         [52]     = KEY_V,
  84         [53]     = KEY_B,
  85         [54]     = KEY_N,
  86         [55]     = KEY_M,
  87         [56]     = KEY_COMMA,
  88         [57]     = KEY_DOT,
  89         [58]     = KEY_SLASH,
  90         [60]     = KEY_KPDOT,
  91         [61]     = KEY_KP7,
  92         [62]     = KEY_KP8,
  93         [63]     = KEY_KP9,
  94         [64]     = KEY_SPACE,
  95         [65]     = KEY_BACKSPACE,
  96         [66]     = KEY_TAB,
  97         [67]     = KEY_KPENTER,
  98         [68]     = KEY_ENTER,
  99         [69]     = KEY_ESC,
 100         [70]     = KEY_DELETE,
 101         [74]     = KEY_KPMINUS,
 102         [76]     = KEY_UP,
 103         [77]     = KEY_DOWN,
 104         [78]     = KEY_RIGHT,
 105         [79]     = KEY_LEFT,
 106         [80]     = KEY_F1,
 107         [81]     = KEY_F2,
 108         [82]     = KEY_F3,
 109         [83]     = KEY_F4,
 110         [84]     = KEY_F5,
 111         [85]     = KEY_F6,
 112         [86]     = KEY_F7,
 113         [87]     = KEY_F8,
 114         [88]     = KEY_F9,
 115         [89]     = KEY_F10,
 116         [90]     = KEY_KPLEFTPAREN,
 117         [91]     = KEY_KPRIGHTPAREN,
 118         [92]     = KEY_KPSLASH,
 119         [93]     = KEY_KPASTERISK,
 120         [94]     = KEY_KPPLUS,
 121         [95]     = KEY_HELP,
 122         [96]     = KEY_LEFTSHIFT,
 123         [97]     = KEY_RIGHTSHIFT,
 124         [98]     = KEY_CAPSLOCK,
 125         [99]     = KEY_LEFTCTRL,
 126         [100]    = KEY_LEFTALT,
 127         [101]    = KEY_RIGHTALT,
 128         [102]    = KEY_LEFTMETA,
 129         [103]    = KEY_RIGHTMETA
 130 };
 131
 132 static void __init amikbd_init_console_keymaps(void)
 133 {
 134         /* We can spare 512 bytes on stack for temp_map in init path. */
 135         unsigned short temp_map[NR_KEYS];
 136         int i, j;
 137
 138         for (i = 0; i < MAX_NR_KEYMAPS; i++) {
 139                 if (!key_maps[i])
 140                         continue;
 141                 memset(temp_map, 0, sizeof(temp_map));
 142                 for (j = 0; j < 0x78; j++) {
 143                         if (!amikbd_keycode[j])
 144                                 continue;
 145                         temp_map[j] = key_maps[i][amikbd_keycode[j]];
 146                 }
 147                 for (j = 0; j < NR_KEYS; j++) {
 148                         if (!temp_map[j])
 149                                 temp_map[j] = 0xf200;
 150                 }
 151                 memcpy(key_maps[i], temp_map, sizeof(temp_map));
 152         }
 153 }
 154 #else /* !CONFIG_HW_CONSOLE */
 155 static inline void amikbd_init_console_keymaps(void) {}
 156 #endif /* !CONFIG_HW_CONSOLE */
 157
 158 static const char *amikbd_messages[8] = {
 159         [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
 160         [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
 161         [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
 162         [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
 163         [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
 164         [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
 165         [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
 166         [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
 167 };
 168
 169 static irqreturn_t amikbd_interrupt(int irq, void *data)
 170 {
 171         struct input_dev *dev = data;
 172         unsigned char scancode, down;
 173
 174         scancode = ~ciaa.sdr;           /* get and invert scancode (keyboard is active low) */
 175         ciaa.cra |= 0x40;               /* switch SP pin to output for handshake */
 176         udelay(85);                     /* wait until 85 us have expired */
 177         ciaa.cra &= ~0x40;              /* switch CIA serial port to input mode */
 178
 179         down = !(scancode & 1);         /* lowest bit is release bit */
 180         scancode >>= 1;
 181
 182         if (scancode < 0x78) {          /* scancodes < 0x78 are keys */
 183                 if (scancode == 98) {   /* CapsLock is a toggle switch key on Amiga */
 184                         input_report_key(dev, scancode, 1);
 185                         input_report_key(dev, scancode, 0);
 186                 } else {
 187                         input_report_key(dev, scancode, down);
 188                 }
 189
 190                 input_sync(dev);
 191         } else                          /* scancodes >= 0x78 are error codes */
 192                 printk(amikbd_messages[scancode - 0x78]);
 193
 194         return IRQ_HANDLED;
 195 }
 196
 197 static int __init amikbd_probe(struct platform_device *pdev)
 198 {
 199         struct input_dev *dev;
 200         int i, err;
 201
 202         dev = input_allocate_device();
 203         if (!dev) {
 204                 dev_err(&pdev->dev, "Not enough memory for input device\n");
 205                 return -ENOMEM;
 206         }
 207
 208         dev->name = pdev->name;
 209         dev->phys = "amikbd/input0";
 210         dev->id.bustype = BUS_AMIGA;
 211         dev->id.vendor = 0x0001;
 212         dev->id.product = 0x0001;
 213         dev->id.version = 0x0100;
 214         dev->dev.parent = &pdev->dev;
 215
 216         dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 217
 218         for (i = 0; i < 0x78; i++)
 219                 set_bit(i, dev->keybit);
 220
 221         amikbd_init_console_keymaps();
 222
 223         ciaa.cra &= ~0x41;       /* serial data in, turn off TA */
 224         err = request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
 225                           dev);
 226         if (err)
 227                 goto fail2;
 228
 229         err = input_register_device(dev);
 230         if (err)
 231                 goto fail3;
 232
 233         platform_set_drvdata(pdev, dev);
 234
 235         return 0;
 236
 237  fail3: free_irq(IRQ_AMIGA_CIAA_SP, dev);
 238  fail2: input_free_device(dev);
 239         return err;
 240 }
 241
 242 static int __exit amikbd_remove(struct platform_device *pdev)
 243 {
 244         struct input_dev *dev = platform_get_drvdata(pdev);
 245
 246         free_irq(IRQ_AMIGA_CIAA_SP, dev);
 247         input_unregister_device(dev);
 248         return 0;
 249 }
 250
 251 static struct platform_driver amikbd_driver = {
 252         .remove = __exit_p(amikbd_remove),
 253         .driver   = {
 254                 .name   = "amiga-keyboard",
 255         },
 256 };
 257
 258 module_platform_driver_probe(amikbd_driver, amikbd_probe);
 259
 260 MODULE_ALIAS("platform:amiga-keyboard");