hw/input/adb-kbd.c

   1 /*
   2  * QEMU ADB keyboard support
   3  *
   4  * Copyright (c) 2004 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu/osdep.h"
  25 #include "hw/input/adb.h"
  26 #include "ui/input.h"
  27 #include "hw/input/adb-keys.h"
  28 #include "sysemu/sysemu.h"
  29 #include "adb-internal.h"
  30 #include "trace.h"
  31
  32 #define ADB_KEYBOARD(obj) OBJECT_CHECK(KBDState, (obj), TYPE_ADB_KEYBOARD)
  33
  34 typedef struct KBDState {
  35     /*< private >*/
  36     ADBDevice parent_obj;
  37     /*< public >*/
  38
  39     uint8_t data[128];
  40     int rptr, wptr, count;
  41 } KBDState;
  42
  43 #define ADB_KEYBOARD_CLASS(class) \
  44     OBJECT_CLASS_CHECK(ADBKeyboardClass, (class), TYPE_ADB_KEYBOARD)
  45 #define ADB_KEYBOARD_GET_CLASS(obj) \
  46     OBJECT_GET_CLASS(ADBKeyboardClass, (obj), TYPE_ADB_KEYBOARD)
  47
  48 typedef struct ADBKeyboardClass {
  49     /*< private >*/
  50     ADBDeviceClass parent_class;
  51     /*< public >*/
  52
  53     DeviceRealize parent_realize;
  54 } ADBKeyboardClass;
  55
  56 /* The adb keyboard doesn't have every key imaginable */
  57 #define NO_KEY 0xff
  58
  59 int qcode_to_adb_keycode[] = {
  60      /* Make sure future additions are automatically set to NO_KEY */
  61     [0 ... 0xff]               = NO_KEY,
  62
  63     [Q_KEY_CODE_SHIFT]         = ADB_KEY_LEFT_SHIFT,
  64     [Q_KEY_CODE_SHIFT_R]       = ADB_KEY_RIGHT_SHIFT,
  65     [Q_KEY_CODE_ALT]           = ADB_KEY_LEFT_OPTION,
  66     [Q_KEY_CODE_ALT_R]         = ADB_KEY_RIGHT_OPTION,
  67     [Q_KEY_CODE_CTRL]          = ADB_KEY_LEFT_CONTROL,
  68     [Q_KEY_CODE_CTRL_R]        = ADB_KEY_RIGHT_CONTROL,
  69     [Q_KEY_CODE_META_L]        = ADB_KEY_COMMAND,
  70     [Q_KEY_CODE_META_R]        = ADB_KEY_COMMAND,
  71     [Q_KEY_CODE_SPC]           = ADB_KEY_SPACEBAR,
  72
  73     [Q_KEY_CODE_ESC]           = ADB_KEY_ESC,
  74     [Q_KEY_CODE_1]             = ADB_KEY_1,
  75     [Q_KEY_CODE_2]             = ADB_KEY_2,
  76     [Q_KEY_CODE_3]             = ADB_KEY_3,
  77     [Q_KEY_CODE_4]             = ADB_KEY_4,
  78     [Q_KEY_CODE_5]             = ADB_KEY_5,
  79     [Q_KEY_CODE_6]             = ADB_KEY_6,
  80     [Q_KEY_CODE_7]             = ADB_KEY_7,
  81     [Q_KEY_CODE_8]             = ADB_KEY_8,
  82     [Q_KEY_CODE_9]             = ADB_KEY_9,
  83     [Q_KEY_CODE_0]             = ADB_KEY_0,
  84     [Q_KEY_CODE_MINUS]         = ADB_KEY_MINUS,
  85     [Q_KEY_CODE_EQUAL]         = ADB_KEY_EQUAL,
  86     [Q_KEY_CODE_BACKSPACE]     = ADB_KEY_DELETE,
  87     [Q_KEY_CODE_TAB]           = ADB_KEY_TAB,
  88     [Q_KEY_CODE_Q]             = ADB_KEY_Q,
  89     [Q_KEY_CODE_W]             = ADB_KEY_W,
  90     [Q_KEY_CODE_E]             = ADB_KEY_E,
  91     [Q_KEY_CODE_R]             = ADB_KEY_R,
  92     [Q_KEY_CODE_T]             = ADB_KEY_T,
  93     [Q_KEY_CODE_Y]             = ADB_KEY_Y,
  94     [Q_KEY_CODE_U]             = ADB_KEY_U,
  95     [Q_KEY_CODE_I]             = ADB_KEY_I,
  96     [Q_KEY_CODE_O]             = ADB_KEY_O,
  97     [Q_KEY_CODE_P]             = ADB_KEY_P,
  98     [Q_KEY_CODE_BRACKET_LEFT]  = ADB_KEY_LEFT_BRACKET,
  99     [Q_KEY_CODE_BRACKET_RIGHT] = ADB_KEY_RIGHT_BRACKET,
 100     [Q_KEY_CODE_RET]           = ADB_KEY_RETURN,
 101     [Q_KEY_CODE_A]             = ADB_KEY_A,
 102     [Q_KEY_CODE_S]             = ADB_KEY_S,
 103     [Q_KEY_CODE_D]             = ADB_KEY_D,
 104     [Q_KEY_CODE_F]             = ADB_KEY_F,
 105     [Q_KEY_CODE_G]             = ADB_KEY_G,
 106     [Q_KEY_CODE_H]             = ADB_KEY_H,
 107     [Q_KEY_CODE_J]             = ADB_KEY_J,
 108     [Q_KEY_CODE_K]             = ADB_KEY_K,
 109     [Q_KEY_CODE_L]             = ADB_KEY_L,
 110     [Q_KEY_CODE_SEMICOLON]     = ADB_KEY_SEMICOLON,
 111     [Q_KEY_CODE_APOSTROPHE]    = ADB_KEY_APOSTROPHE,
 112     [Q_KEY_CODE_GRAVE_ACCENT]  = ADB_KEY_GRAVE_ACCENT,
 113     [Q_KEY_CODE_BACKSLASH]     = ADB_KEY_BACKSLASH,
 114     [Q_KEY_CODE_Z]             = ADB_KEY_Z,
 115     [Q_KEY_CODE_X]             = ADB_KEY_X,
 116     [Q_KEY_CODE_C]             = ADB_KEY_C,
 117     [Q_KEY_CODE_V]             = ADB_KEY_V,
 118     [Q_KEY_CODE_B]             = ADB_KEY_B,
 119     [Q_KEY_CODE_N]             = ADB_KEY_N,
 120     [Q_KEY_CODE_M]             = ADB_KEY_M,
 121     [Q_KEY_CODE_COMMA]         = ADB_KEY_COMMA,
 122     [Q_KEY_CODE_DOT]           = ADB_KEY_PERIOD,
 123     [Q_KEY_CODE_SLASH]         = ADB_KEY_FORWARD_SLASH,
 124     [Q_KEY_CODE_ASTERISK]      = ADB_KEY_KP_MULTIPLY,
 125     [Q_KEY_CODE_CAPS_LOCK]     = ADB_KEY_CAPS_LOCK,
 126
 127     [Q_KEY_CODE_F1]            = ADB_KEY_F1,
 128     [Q_KEY_CODE_F2]            = ADB_KEY_F2,
 129     [Q_KEY_CODE_F3]            = ADB_KEY_F3,
 130     [Q_KEY_CODE_F4]            = ADB_KEY_F4,
 131     [Q_KEY_CODE_F5]            = ADB_KEY_F5,
 132     [Q_KEY_CODE_F6]            = ADB_KEY_F6,
 133     [Q_KEY_CODE_F7]            = ADB_KEY_F7,
 134     [Q_KEY_CODE_F8]            = ADB_KEY_F8,
 135     [Q_KEY_CODE_F9]            = ADB_KEY_F9,
 136     [Q_KEY_CODE_F10]           = ADB_KEY_F10,
 137     [Q_KEY_CODE_F11]           = ADB_KEY_F11,
 138     [Q_KEY_CODE_F12]           = ADB_KEY_F12,
 139     [Q_KEY_CODE_PRINT]         = ADB_KEY_F13,
 140     [Q_KEY_CODE_SYSRQ]         = ADB_KEY_F13,
 141     [Q_KEY_CODE_SCROLL_LOCK]   = ADB_KEY_F14,
 142     [Q_KEY_CODE_PAUSE]         = ADB_KEY_F15,
 143
 144     [Q_KEY_CODE_NUM_LOCK]      = ADB_KEY_KP_CLEAR,
 145     [Q_KEY_CODE_KP_EQUALS]     = ADB_KEY_KP_EQUAL,
 146     [Q_KEY_CODE_KP_DIVIDE]     = ADB_KEY_KP_DIVIDE,
 147     [Q_KEY_CODE_KP_MULTIPLY]   = ADB_KEY_KP_MULTIPLY,
 148     [Q_KEY_CODE_KP_SUBTRACT]   = ADB_KEY_KP_SUBTRACT,
 149     [Q_KEY_CODE_KP_ADD]        = ADB_KEY_KP_PLUS,
 150     [Q_KEY_CODE_KP_ENTER]      = ADB_KEY_KP_ENTER,
 151     [Q_KEY_CODE_KP_DECIMAL]    = ADB_KEY_KP_PERIOD,
 152     [Q_KEY_CODE_KP_0]          = ADB_KEY_KP_0,
 153     [Q_KEY_CODE_KP_1]          = ADB_KEY_KP_1,
 154     [Q_KEY_CODE_KP_2]          = ADB_KEY_KP_2,
 155     [Q_KEY_CODE_KP_3]          = ADB_KEY_KP_3,
 156     [Q_KEY_CODE_KP_4]          = ADB_KEY_KP_4,
 157     [Q_KEY_CODE_KP_5]          = ADB_KEY_KP_5,
 158     [Q_KEY_CODE_KP_6]          = ADB_KEY_KP_6,
 159     [Q_KEY_CODE_KP_7]          = ADB_KEY_KP_7,
 160     [Q_KEY_CODE_KP_8]          = ADB_KEY_KP_8,
 161     [Q_KEY_CODE_KP_9]          = ADB_KEY_KP_9,
 162
 163     [Q_KEY_CODE_UP]            = ADB_KEY_UP,
 164     [Q_KEY_CODE_DOWN]          = ADB_KEY_DOWN,
 165     [Q_KEY_CODE_LEFT]          = ADB_KEY_LEFT,
 166     [Q_KEY_CODE_RIGHT]         = ADB_KEY_RIGHT,
 167
 168     [Q_KEY_CODE_HELP]          = ADB_KEY_HELP,
 169     [Q_KEY_CODE_INSERT]        = ADB_KEY_HELP,
 170     [Q_KEY_CODE_DELETE]        = ADB_KEY_FORWARD_DELETE,
 171     [Q_KEY_CODE_HOME]          = ADB_KEY_HOME,
 172     [Q_KEY_CODE_END]           = ADB_KEY_END,
 173     [Q_KEY_CODE_PGUP]          = ADB_KEY_PAGE_UP,
 174     [Q_KEY_CODE_PGDN]          = ADB_KEY_PAGE_DOWN,
 175
 176     [Q_KEY_CODE_POWER]         = ADB_KEY_POWER
 177 };
 178
 179 static void adb_kbd_put_keycode(void *opaque, int keycode)
 180 {
 181     KBDState *s = opaque;
 182
 183     if (s->count < sizeof(s->data)) {
 184         s->data[s->wptr] = keycode;
 185         if (++s->wptr == sizeof(s->data)) {
 186             s->wptr = 0;
 187         }
 188         s->count++;
 189     }
 190 }
 191
 192 static int adb_kbd_poll(ADBDevice *d, uint8_t *obuf)
 193 {
 194     KBDState *s = ADB_KEYBOARD(d);
 195     int keycode;
 196     int olen;
 197
 198     olen = 0;
 199     if (s->count == 0) {
 200         return 0;
 201     }
 202     keycode = s->data[s->rptr];
 203     s->rptr++;
 204     if (s->rptr == sizeof(s->data)) {
 205         s->rptr = 0;
 206     }
 207     s->count--;
 208     /*
 209      * The power key is the only two byte value key, so it is a special case.
 210      * Since 0x7f is not a used keycode for ADB we overload it to indicate the
 211      * power button when we're storing keycodes in our internal buffer, and
 212      * expand it out to two bytes when we send to the guest.
 213      */
 214     if (keycode == 0x7f) {
 215         obuf[0] = 0x7f;
 216         obuf[1] = 0x7f;
 217         olen = 2;
 218     } else {
 219         obuf[0] = keycode;
 220         /* NOTE: the power key key-up is the two byte sequence 0xff 0xff;
 221          * otherwise we could in theory send a second keycode in the second
 222          * byte, but choose not to bother.
 223          */
 224         obuf[1] = 0xff;
 225         olen = 2;
 226     }
 227
 228     return olen;
 229 }
 230
 231 static int adb_kbd_request(ADBDevice *d, uint8_t *obuf,
 232                            const uint8_t *buf, int len)
 233 {
 234     KBDState *s = ADB_KEYBOARD(d);
 235     int cmd, reg, olen;
 236
 237     if ((buf[0] & 0x0f) == ADB_FLUSH) {
 238         /* flush keyboard fifo */
 239         s->wptr = s->rptr = s->count = 0;
 240         return 0;
 241     }
 242
 243     cmd = buf[0] & 0xc;
 244     reg = buf[0] & 0x3;
 245     olen = 0;
 246     switch (cmd) {
 247     case ADB_WRITEREG:
 248         trace_adb_kbd_writereg(reg, buf[1]);
 249         switch (reg) {
 250         case 2:
 251             /* LED status */
 252             break;
 253         case 3:
 254             switch (buf[2]) {
 255             case ADB_CMD_SELF_TEST:
 256                 break;
 257             case ADB_CMD_CHANGE_ID:
 258             case ADB_CMD_CHANGE_ID_AND_ACT:
 259             case ADB_CMD_CHANGE_ID_AND_ENABLE:
 260                 d->devaddr = buf[1] & 0xf;
 261                 trace_adb_kbd_request_change_addr(d->devaddr);
 262                 break;
 263             default:
 264                 if (!d->disable_direct_reg3_writes) {
 265                     d->devaddr = buf[1] & 0xf;
 266
 267                     /* we support handlers:
 268                      * 1: Apple Standard Keyboard
 269                      * 2: Apple Extended Keyboard (LShift = RShift)
 270                      * 3: Apple Extended Keyboard (LShift != RShift)
 271                      */
 272                     if (buf[2] == 1 || buf[2] == 2 || buf[2] == 3) {
 273                         d->handler = buf[2];
 274                     }
 275
 276                     trace_adb_kbd_request_change_addr_and_handler(d->devaddr,
 277                                                                   d->handler);
 278                 }
 279                 break;
 280             }
 281         }
 282         break;
 283     case ADB_READREG:
 284         switch (reg) {
 285         case 0:
 286             olen = adb_kbd_poll(d, obuf);
 287             break;
 288         case 1:
 289             break;
 290         case 2:
 291             obuf[0] = 0x00; /* XXX: check this */
 292             obuf[1] = 0x07; /* led status */
 293             olen = 2;
 294             break;
 295         case 3:
 296             obuf[0] = d->devaddr;
 297             obuf[1] = d->handler;
 298             olen = 2;
 299             break;
 300         }
 301         trace_adb_kbd_readreg(reg, obuf[0], obuf[1]);
 302         break;
 303     }
 304     return olen;
 305 }
 306
 307 /* This is where keyboard events enter this file */
 308 static void adb_keyboard_event(DeviceState *dev, QemuConsole *src,
 309                                InputEvent *evt)
 310 {
 311     KBDState *s = (KBDState *)dev;
 312     int qcode, keycode;
 313
 314     qcode = qemu_input_key_value_to_qcode(evt->u.key.data->key);
 315     if (qcode >= ARRAY_SIZE(qcode_to_adb_keycode)) {
 316         return;
 317     }
 318     /* FIXME: take handler into account when translating qcode */
 319     keycode = qcode_to_adb_keycode[qcode];
 320     if (keycode == NO_KEY) {  /* We don't want to send this to the guest */
 321         trace_adb_kbd_no_key();
 322         return;
 323     }
 324     if (evt->u.key.data->down == false) { /* if key release event */
 325         keycode = keycode | 0x80;   /* create keyboard break code */
 326     }
 327
 328     adb_kbd_put_keycode(s, keycode);
 329 }
 330
 331 static const VMStateDescription vmstate_adb_kbd = {
 332     .name = "adb_kbd",
 333     .version_id = 2,
 334     .minimum_version_id = 2,
 335     .fields = (VMStateField[]) {
 336         VMSTATE_STRUCT(parent_obj, KBDState, 0, vmstate_adb_device, ADBDevice),
 337         VMSTATE_BUFFER(data, KBDState),
 338         VMSTATE_INT32(rptr, KBDState),
 339         VMSTATE_INT32(wptr, KBDState),
 340         VMSTATE_INT32(count, KBDState),
 341         VMSTATE_END_OF_LIST()
 342     }
 343 };
 344
 345 static void adb_kbd_reset(DeviceState *dev)
 346 {
 347     ADBDevice *d = ADB_DEVICE(dev);
 348     KBDState *s = ADB_KEYBOARD(dev);
 349
 350     d->handler = 1;
 351     d->devaddr = ADB_DEVID_KEYBOARD;
 352     memset(s->data, 0, sizeof(s->data));
 353     s->rptr = 0;
 354     s->wptr = 0;
 355     s->count = 0;
 356 }
 357
 358 static QemuInputHandler adb_keyboard_handler = {
 359     .name  = "QEMU ADB Keyboard",
 360     .mask  = INPUT_EVENT_MASK_KEY,
 361     .event = adb_keyboard_event,
 362 };
 363
 364 static void adb_kbd_realizefn(DeviceState *dev, Error **errp)
 365 {
 366     ADBKeyboardClass *akc = ADB_KEYBOARD_GET_CLASS(dev);
 367     akc->parent_realize(dev, errp);
 368     qemu_input_handler_register(dev, &adb_keyboard_handler);
 369 }
 370
 371 static void adb_kbd_initfn(Object *obj)
 372 {
 373     ADBDevice *d = ADB_DEVICE(obj);
 374
 375     d->devaddr = ADB_DEVID_KEYBOARD;
 376 }
 377
 378 static void adb_kbd_class_init(ObjectClass *oc, void *data)
 379 {
 380     DeviceClass *dc = DEVICE_CLASS(oc);
 381     ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc);
 382     ADBKeyboardClass *akc = ADB_KEYBOARD_CLASS(oc);
 383
 384     device_class_set_parent_realize(dc, adb_kbd_realizefn,
 385                                     &akc->parent_realize);
 386     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 387
 388     adc->devreq = adb_kbd_request;
 389     dc->reset = adb_kbd_reset;
 390     dc->vmsd = &vmstate_adb_kbd;
 391 }
 392
 393 static const TypeInfo adb_kbd_type_info = {
 394     .name = TYPE_ADB_KEYBOARD,
 395     .parent = TYPE_ADB_DEVICE,
 396     .instance_size = sizeof(KBDState),
 397     .instance_init = adb_kbd_initfn,
 398     .class_init = adb_kbd_class_init,
 399     .class_size = sizeof(ADBKeyboardClass),
 400 };
 401
 402 static void adb_kbd_register_types(void)
 403 {
 404     type_register_static(&adb_kbd_type_info);
 405 }
 406
 407 type_init(adb_kbd_register_types)