hw/input/ps2.c

   1 /*
   2  * QEMU PS/2 keyboard/mouse emulation
   3  *
   4  * Copyright (c) 2003 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 "qemu/log.h"
  26 #include "hw/hw.h"
  27 #include "hw/input/ps2.h"
  28 #include "ui/console.h"
  29 #include "ui/input.h"
  30 #include "sysemu/sysemu.h"
  31
  32 #include "trace.h"
  33
  34 /* debug PC keyboard */
  35 //#define DEBUG_KBD
  36
  37 /* debug PC keyboard : only mouse */
  38 //#define DEBUG_MOUSE
  39
  40 /* Keyboard Commands */
  41 #define KBD_CMD_SET_LEDS        0xED    /* Set keyboard leds */
  42 #define KBD_CMD_ECHO            0xEE
  43 #define KBD_CMD_SCANCODE        0xF0    /* Get/set scancode set */
  44 #define KBD_CMD_GET_ID          0xF2    /* get keyboard ID */
  45 #define KBD_CMD_SET_RATE        0xF3    /* Set typematic rate */
  46 #define KBD_CMD_ENABLE          0xF4    /* Enable scanning */
  47 #define KBD_CMD_RESET_DISABLE   0xF5    /* reset and disable scanning */
  48 #define KBD_CMD_RESET_ENABLE    0xF6    /* reset and enable scanning */
  49 #define KBD_CMD_RESET           0xFF    /* Reset */
  50
  51 /* Keyboard Replies */
  52 #define KBD_REPLY_POR           0xAA    /* Power on reset */
  53 #define KBD_REPLY_ID            0xAB    /* Keyboard ID */
  54 #define KBD_REPLY_ACK           0xFA    /* Command ACK */
  55 #define KBD_REPLY_RESEND        0xFE    /* Command NACK, send the cmd again */
  56
  57 /* Mouse Commands */
  58 #define AUX_SET_SCALE11         0xE6    /* Set 1:1 scaling */
  59 #define AUX_SET_SCALE21         0xE7    /* Set 2:1 scaling */
  60 #define AUX_SET_RES             0xE8    /* Set resolution */
  61 #define AUX_GET_SCALE           0xE9    /* Get scaling factor */
  62 #define AUX_SET_STREAM          0xEA    /* Set stream mode */
  63 #define AUX_POLL                0xEB    /* Poll */
  64 #define AUX_RESET_WRAP          0xEC    /* Reset wrap mode */
  65 #define AUX_SET_WRAP            0xEE    /* Set wrap mode */
  66 #define AUX_SET_REMOTE          0xF0    /* Set remote mode */
  67 #define AUX_GET_TYPE            0xF2    /* Get type */
  68 #define AUX_SET_SAMPLE          0xF3    /* Set sample rate */
  69 #define AUX_ENABLE_DEV          0xF4    /* Enable aux device */
  70 #define AUX_DISABLE_DEV         0xF5    /* Disable aux device */
  71 #define AUX_SET_DEFAULT         0xF6
  72 #define AUX_RESET               0xFF    /* Reset aux device */
  73 #define AUX_ACK                 0xFA    /* Command byte ACK. */
  74
  75 #define MOUSE_STATUS_REMOTE     0x40
  76 #define MOUSE_STATUS_ENABLED    0x20
  77 #define MOUSE_STATUS_SCALE21    0x10
  78
  79 #define PS2_QUEUE_SIZE 16  /* Buffer size required by PS/2 protocol */
  80
  81 /* Bits for 'modifiers' field in PS2KbdState */
  82 #define MOD_CTRL_L  (1 << 0)
  83 #define MOD_SHIFT_L (1 << 1)
  84 #define MOD_ALT_L   (1 << 2)
  85 #define MOD_CTRL_R  (1 << 3)
  86 #define MOD_SHIFT_R (1 << 4)
  87 #define MOD_ALT_R   (1 << 5)
  88
  89 typedef struct {
  90     /* Keep the data array 256 bytes long, which compatibility
  91      with older qemu versions. */
  92     uint8_t data[256];
  93     int rptr, wptr, count;
  94 } PS2Queue;
  95
  96 struct PS2State {
  97     PS2Queue queue;
  98     int32_t write_cmd;
  99     void (*update_irq)(void *, int);
 100     void *update_arg;
 101 };
 102
 103 typedef struct {
 104     PS2State common;
 105     int scan_enabled;
 106     int translate;
 107     int scancode_set; /* 1=XT, 2=AT, 3=PS/2 */
 108     int ledstate;
 109     bool need_high_bit;
 110     unsigned int modifiers; /* bitmask of MOD_* constants above */
 111 } PS2KbdState;
 112
 113 typedef struct {
 114     PS2State common;
 115     uint8_t mouse_status;
 116     uint8_t mouse_resolution;
 117     uint8_t mouse_sample_rate;
 118     uint8_t mouse_wrap;
 119     uint8_t mouse_type; /* 0 = PS2, 3 = IMPS/2, 4 = IMEX */
 120     uint8_t mouse_detect_state;
 121     int mouse_dx; /* current values, needed for 'poll' mode */
 122     int mouse_dy;
 123     int mouse_dz;
 124     uint8_t mouse_buttons;
 125 } PS2MouseState;
 126
 127 static uint8_t translate_table[256] = {
 128     0xff, 0x43, 0x41, 0x3f, 0x3d, 0x3b, 0x3c, 0x58,
 129     0x64, 0x44, 0x42, 0x40, 0x3e, 0x0f, 0x29, 0x59,
 130     0x65, 0x38, 0x2a, 0x70, 0x1d, 0x10, 0x02, 0x5a,
 131     0x66, 0x71, 0x2c, 0x1f, 0x1e, 0x11, 0x03, 0x5b,
 132     0x67, 0x2e, 0x2d, 0x20, 0x12, 0x05, 0x04, 0x5c,
 133     0x68, 0x39, 0x2f, 0x21, 0x14, 0x13, 0x06, 0x5d,
 134     0x69, 0x31, 0x30, 0x23, 0x22, 0x15, 0x07, 0x5e,
 135     0x6a, 0x72, 0x32, 0x24, 0x16, 0x08, 0x09, 0x5f,
 136     0x6b, 0x33, 0x25, 0x17, 0x18, 0x0b, 0x0a, 0x60,
 137     0x6c, 0x34, 0x35, 0x26, 0x27, 0x19, 0x0c, 0x61,
 138     0x6d, 0x73, 0x28, 0x74, 0x1a, 0x0d, 0x62, 0x6e,
 139     0x3a, 0x36, 0x1c, 0x1b, 0x75, 0x2b, 0x63, 0x76,
 140     0x55, 0x56, 0x77, 0x78, 0x79, 0x7a, 0x0e, 0x7b,
 141     0x7c, 0x4f, 0x7d, 0x4b, 0x47, 0x7e, 0x7f, 0x6f,
 142     0x52, 0x53, 0x50, 0x4c, 0x4d, 0x48, 0x01, 0x45,
 143     0x57, 0x4e, 0x51, 0x4a, 0x37, 0x49, 0x46, 0x54,
 144     0x80, 0x81, 0x82, 0x41, 0x54, 0x85, 0x86, 0x87,
 145     0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
 146     0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
 147     0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
 148     0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 149     0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 150     0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
 151     0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
 152     0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
 153     0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
 154     0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
 155     0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
 156     0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
 157     0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
 158     0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
 159     0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
 160 };
 161
 162 static unsigned int ps2_modifier_bit(QKeyCode key)
 163 {
 164     switch (key) {
 165     case Q_KEY_CODE_CTRL:
 166         return MOD_CTRL_L;
 167     case Q_KEY_CODE_CTRL_R:
 168         return MOD_CTRL_R;
 169     case Q_KEY_CODE_SHIFT:
 170         return MOD_SHIFT_L;
 171     case Q_KEY_CODE_SHIFT_R:
 172         return MOD_SHIFT_R;
 173     case Q_KEY_CODE_ALT:
 174         return MOD_ALT_L;
 175     case Q_KEY_CODE_ALT_R:
 176         return MOD_ALT_R;
 177     default:
 178         return 0;
 179     }
 180 }
 181
 182 static void ps2_reset_queue(PS2State *s)
 183 {
 184     PS2Queue *q = &s->queue;
 185
 186     q->rptr = 0;
 187     q->wptr = 0;
 188     q->count = 0;
 189 }
 190
 191 void ps2_queue(PS2State *s, int b)
 192 {
 193     PS2Queue *q = &s->queue;
 194
 195     if (q->count >= PS2_QUEUE_SIZE - 1)
 196         return;
 197     q->data[q->wptr] = b;
 198     if (++q->wptr == PS2_QUEUE_SIZE)
 199         q->wptr = 0;
 200     q->count++;
 201     s->update_irq(s->update_arg, 1);
 202 }
 203
 204 /* keycode is the untranslated scancode in the current scancode set. */
 205 static void ps2_put_keycode(void *opaque, int keycode)
 206 {
 207     PS2KbdState *s = opaque;
 208
 209     trace_ps2_put_keycode(opaque, keycode);
 210     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 211
 212     if (s->translate) {
 213         if (keycode == 0xf0) {
 214             s->need_high_bit = true;
 215         } else if (s->need_high_bit) {
 216             ps2_queue(&s->common, translate_table[keycode] | 0x80);
 217             s->need_high_bit = false;
 218         } else {
 219             ps2_queue(&s->common, translate_table[keycode]);
 220         }
 221     } else {
 222         ps2_queue(&s->common, keycode);
 223     }
 224 }
 225
 226 static void ps2_keyboard_event(DeviceState *dev, QemuConsole *src,
 227                                InputEvent *evt)
 228 {
 229     PS2KbdState *s = (PS2KbdState *)dev;
 230     InputKeyEvent *key = evt->u.key.data;
 231     int qcode;
 232     uint16_t keycode = 0;
 233     int mod;
 234
 235     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 236     assert(evt->type == INPUT_EVENT_KIND_KEY);
 237     qcode = qemu_input_key_value_to_qcode(key->key);
 238
 239     mod = ps2_modifier_bit(qcode);
 240     trace_ps2_keyboard_event(s, qcode, key->down, mod, s->modifiers);
 241     if (key->down) {
 242         s->modifiers |= mod;
 243     } else {
 244         s->modifiers &= ~mod;
 245     }
 246
 247     if (s->scancode_set == 1) {
 248         if (qcode == Q_KEY_CODE_PAUSE) {
 249             if (s->modifiers & (MOD_CTRL_L | MOD_CTRL_R)) {
 250                 if (key->down) {
 251                     ps2_put_keycode(s, 0xe0);
 252                     ps2_put_keycode(s, 0x46);
 253                     ps2_put_keycode(s, 0xe0);
 254                     ps2_put_keycode(s, 0xc6);
 255                 }
 256             } else {
 257                 if (key->down) {
 258                     ps2_put_keycode(s, 0xe1);
 259                     ps2_put_keycode(s, 0x1d);
 260                     ps2_put_keycode(s, 0x45);
 261                     ps2_put_keycode(s, 0xe1);
 262                     ps2_put_keycode(s, 0x9d);
 263                     ps2_put_keycode(s, 0xc5);
 264                 }
 265             }
 266         } else if (qcode == Q_KEY_CODE_PRINT) {
 267             if (s->modifiers & MOD_ALT_L) {
 268                 if (key->down) {
 269                     ps2_put_keycode(s, 0xb8);
 270                     ps2_put_keycode(s, 0x38);
 271                     ps2_put_keycode(s, 0x54);
 272                 } else {
 273                     ps2_put_keycode(s, 0xd4);
 274                     ps2_put_keycode(s, 0xb8);
 275                     ps2_put_keycode(s, 0x38);
 276                 }
 277             } else if (s->modifiers & MOD_ALT_R) {
 278                 if (key->down) {
 279                     ps2_put_keycode(s, 0xe0);
 280                     ps2_put_keycode(s, 0xb8);
 281                     ps2_put_keycode(s, 0xe0);
 282                     ps2_put_keycode(s, 0x38);
 283                     ps2_put_keycode(s, 0x54);
 284                 } else {
 285                     ps2_put_keycode(s, 0xd4);
 286                     ps2_put_keycode(s, 0xe0);
 287                     ps2_put_keycode(s, 0xb8);
 288                     ps2_put_keycode(s, 0xe0);
 289                     ps2_put_keycode(s, 0x38);
 290                 }
 291             } else if (s->modifiers & (MOD_SHIFT_L | MOD_CTRL_L |
 292                                        MOD_SHIFT_R | MOD_CTRL_R)) {
 293                 if (key->down) {
 294                     ps2_put_keycode(s, 0xe0);
 295                     ps2_put_keycode(s, 0x37);
 296                 } else {
 297                     ps2_put_keycode(s, 0xe0);
 298                     ps2_put_keycode(s, 0xb7);
 299                 }
 300             } else {
 301                 if (key->down) {
 302                     ps2_put_keycode(s, 0xe0);
 303                     ps2_put_keycode(s, 0x2a);
 304                     ps2_put_keycode(s, 0xe0);
 305                     ps2_put_keycode(s, 0x37);
 306                 } else {
 307                     ps2_put_keycode(s, 0xe0);
 308                     ps2_put_keycode(s, 0xb7);
 309                     ps2_put_keycode(s, 0xe0);
 310                     ps2_put_keycode(s, 0xaa);
 311                 }
 312             }
 313         } else {
 314             if (qcode < qemu_input_map_qcode_to_atset1_len)
 315                 keycode = qemu_input_map_qcode_to_atset1[qcode];
 316             if (keycode) {
 317                 if (keycode & 0xff00) {
 318                     ps2_put_keycode(s, keycode >> 8);
 319                 }
 320                 if (!key->down) {
 321                     keycode |= 0x80;
 322                 }
 323                 ps2_put_keycode(s, keycode & 0xff);
 324             } else {
 325                 qemu_log_mask(LOG_UNIMP,
 326                               "ps2: ignoring key with qcode %d\n", qcode);
 327             }
 328         }
 329     } else if (s->scancode_set == 2) {
 330         if (qcode == Q_KEY_CODE_PAUSE) {
 331             if (s->modifiers & (MOD_CTRL_L | MOD_CTRL_R)) {
 332                 if (key->down) {
 333                     ps2_put_keycode(s, 0xe0);
 334                     ps2_put_keycode(s, 0x7e);
 335                     ps2_put_keycode(s, 0xe0);
 336                     ps2_put_keycode(s, 0xf0);
 337                     ps2_put_keycode(s, 0x7e);
 338                 }
 339             } else {
 340                 if (key->down) {
 341                     ps2_put_keycode(s, 0xe1);
 342                     ps2_put_keycode(s, 0x14);
 343                     ps2_put_keycode(s, 0x77);
 344                     ps2_put_keycode(s, 0xe1);
 345                     ps2_put_keycode(s, 0xf0);
 346                     ps2_put_keycode(s, 0x14);
 347                     ps2_put_keycode(s, 0xf0);
 348                     ps2_put_keycode(s, 0x77);
 349                 }
 350             }
 351         } else if (qcode == Q_KEY_CODE_PRINT) {
 352             if (s->modifiers & MOD_ALT_L) {
 353                 if (key->down) {
 354                     ps2_put_keycode(s, 0xf0);
 355                     ps2_put_keycode(s, 0x11);
 356                     ps2_put_keycode(s, 0x11);
 357                     ps2_put_keycode(s, 0x84);
 358                 } else {
 359                     ps2_put_keycode(s, 0xf0);
 360                     ps2_put_keycode(s, 0x84);
 361                     ps2_put_keycode(s, 0xf0);
 362                     ps2_put_keycode(s, 0x11);
 363                     ps2_put_keycode(s, 0x11);
 364                 }
 365             } else if (s->modifiers & MOD_ALT_R) {
 366                 if (key->down) {
 367                     ps2_put_keycode(s, 0xe0);
 368                     ps2_put_keycode(s, 0xf0);
 369                     ps2_put_keycode(s, 0x11);
 370                     ps2_put_keycode(s, 0xe0);
 371                     ps2_put_keycode(s, 0x11);
 372                     ps2_put_keycode(s, 0x84);
 373                 } else {
 374                     ps2_put_keycode(s, 0xf0);
 375                     ps2_put_keycode(s, 0x84);
 376                     ps2_put_keycode(s, 0xe0);
 377                     ps2_put_keycode(s, 0xf0);
 378                     ps2_put_keycode(s, 0x11);
 379                     ps2_put_keycode(s, 0xe0);
 380                     ps2_put_keycode(s, 0x11);
 381                 }
 382             } else if (s->modifiers & (MOD_SHIFT_L | MOD_CTRL_L |
 383                                        MOD_SHIFT_R | MOD_CTRL_R)) {
 384                 if (key->down) {
 385                     ps2_put_keycode(s, 0xe0);
 386                     ps2_put_keycode(s, 0x7c);
 387                 } else {
 388                     ps2_put_keycode(s, 0xe0);
 389                     ps2_put_keycode(s, 0xf0);
 390                     ps2_put_keycode(s, 0x7c);
 391                 }
 392             } else {
 393                 if (key->down) {
 394                     ps2_put_keycode(s, 0xe0);
 395                     ps2_put_keycode(s, 0x12);
 396                     ps2_put_keycode(s, 0xe0);
 397                     ps2_put_keycode(s, 0x7c);
 398                 } else {
 399                     ps2_put_keycode(s, 0xe0);
 400                     ps2_put_keycode(s, 0xf0);
 401                     ps2_put_keycode(s, 0x7c);
 402                     ps2_put_keycode(s, 0xe0);
 403                     ps2_put_keycode(s, 0xf0);
 404                     ps2_put_keycode(s, 0x12);
 405                 }
 406             }
 407         } else {
 408             if (qcode < qemu_input_map_qcode_to_atset2_len)
 409                 keycode = qemu_input_map_qcode_to_atset2[qcode];
 410             if (keycode) {
 411                 if (keycode & 0xff00) {
 412                     ps2_put_keycode(s, keycode >> 8);
 413                 }
 414                 if (!key->down) {
 415                     ps2_put_keycode(s, 0xf0);
 416                 }
 417                 ps2_put_keycode(s, keycode & 0xff);
 418             } else {
 419                 qemu_log_mask(LOG_UNIMP,
 420                               "ps2: ignoring key with qcode %d\n", qcode);
 421             }
 422         }
 423     } else if (s->scancode_set == 3) {
 424         if (qcode < qemu_input_map_qcode_to_atset3_len)
 425             keycode = qemu_input_map_qcode_to_atset3[qcode];
 426         if (keycode) {
 427             /* FIXME: break code should be configured on a key by key basis */
 428             if (!key->down) {
 429                 ps2_put_keycode(s, 0xf0);
 430             }
 431             ps2_put_keycode(s, keycode);
 432         } else {
 433             qemu_log_mask(LOG_UNIMP,
 434                           "ps2: ignoring key with qcode %d\n", qcode);
 435         }
 436     }
 437 }
 438
 439 uint32_t ps2_read_data(PS2State *s)
 440 {
 441     PS2Queue *q;
 442     int val, index;
 443
 444     trace_ps2_read_data(s);
 445     q = &s->queue;
 446     if (q->count == 0) {
 447         /* NOTE: if no data left, we return the last keyboard one
 448            (needed for EMM386) */
 449         /* XXX: need a timer to do things correctly */
 450         index = q->rptr - 1;
 451         if (index < 0)
 452             index = PS2_QUEUE_SIZE - 1;
 453         val = q->data[index];
 454     } else {
 455         val = q->data[q->rptr];
 456         if (++q->rptr == PS2_QUEUE_SIZE)
 457             q->rptr = 0;
 458         q->count--;
 459         /* reading deasserts IRQ */
 460         s->update_irq(s->update_arg, 0);
 461         /* reassert IRQs if data left */
 462         s->update_irq(s->update_arg, q->count != 0);
 463     }
 464     return val;
 465 }
 466
 467 static void ps2_set_ledstate(PS2KbdState *s, int ledstate)
 468 {
 469     trace_ps2_set_ledstate(s, ledstate);
 470     s->ledstate = ledstate;
 471     kbd_put_ledstate(ledstate);
 472 }
 473
 474 static void ps2_reset_keyboard(PS2KbdState *s)
 475 {
 476     trace_ps2_reset_keyboard(s);
 477     s->scan_enabled = 1;
 478     s->scancode_set = 2;
 479     ps2_reset_queue(&s->common);
 480     ps2_set_ledstate(s, 0);
 481 }
 482
 483 void ps2_write_keyboard(void *opaque, int val)
 484 {
 485     PS2KbdState *s = (PS2KbdState *)opaque;
 486
 487     trace_ps2_write_keyboard(opaque, val);
 488     switch(s->common.write_cmd) {
 489     default:
 490     case -1:
 491         switch(val) {
 492         case 0x00:
 493             ps2_queue(&s->common, KBD_REPLY_ACK);
 494             break;
 495         case 0x05:
 496             ps2_queue(&s->common, KBD_REPLY_RESEND);
 497             break;
 498         case KBD_CMD_GET_ID:
 499             ps2_queue(&s->common, KBD_REPLY_ACK);
 500             /* We emulate a MF2 AT keyboard here */
 501             ps2_queue(&s->common, KBD_REPLY_ID);
 502             if (s->translate)
 503                 ps2_queue(&s->common, 0x41);
 504             else
 505                 ps2_queue(&s->common, 0x83);
 506             break;
 507         case KBD_CMD_ECHO:
 508             ps2_queue(&s->common, KBD_CMD_ECHO);
 509             break;
 510         case KBD_CMD_ENABLE:
 511             s->scan_enabled = 1;
 512             ps2_queue(&s->common, KBD_REPLY_ACK);
 513             break;
 514         case KBD_CMD_SCANCODE:
 515         case KBD_CMD_SET_LEDS:
 516         case KBD_CMD_SET_RATE:
 517             s->common.write_cmd = val;
 518             ps2_queue(&s->common, KBD_REPLY_ACK);
 519             break;
 520         case KBD_CMD_RESET_DISABLE:
 521             ps2_reset_keyboard(s);
 522             s->scan_enabled = 0;
 523             ps2_queue(&s->common, KBD_REPLY_ACK);
 524             break;
 525         case KBD_CMD_RESET_ENABLE:
 526             ps2_reset_keyboard(s);
 527             s->scan_enabled = 1;
 528             ps2_queue(&s->common, KBD_REPLY_ACK);
 529             break;
 530         case KBD_CMD_RESET:
 531             ps2_reset_keyboard(s);
 532             ps2_queue(&s->common, KBD_REPLY_ACK);
 533             ps2_queue(&s->common, KBD_REPLY_POR);
 534             break;
 535         default:
 536             ps2_queue(&s->common, KBD_REPLY_RESEND);
 537             break;
 538         }
 539         break;
 540     case KBD_CMD_SCANCODE:
 541         if (val == 0) {
 542             ps2_queue(&s->common, KBD_REPLY_ACK);
 543             ps2_put_keycode(s, s->scancode_set);
 544         } else if (val >= 1 && val <= 3) {
 545             s->scancode_set = val;
 546             ps2_queue(&s->common, KBD_REPLY_ACK);
 547         } else {
 548             ps2_queue(&s->common, KBD_REPLY_RESEND);
 549         }
 550         s->common.write_cmd = -1;
 551         break;
 552     case KBD_CMD_SET_LEDS:
 553         ps2_set_ledstate(s, val);
 554         ps2_queue(&s->common, KBD_REPLY_ACK);
 555         s->common.write_cmd = -1;
 556         break;
 557     case KBD_CMD_SET_RATE:
 558         ps2_queue(&s->common, KBD_REPLY_ACK);
 559         s->common.write_cmd = -1;
 560         break;
 561     }
 562 }
 563
 564 /* Set the scancode translation mode.
 565    0 = raw scancodes.
 566    1 = translated scancodes (used by qemu internally).  */
 567
 568 void ps2_keyboard_set_translation(void *opaque, int mode)
 569 {
 570     PS2KbdState *s = (PS2KbdState *)opaque;
 571     trace_ps2_keyboard_set_translation(opaque, mode);
 572     s->translate = mode;
 573 }
 574
 575 static void ps2_mouse_send_packet(PS2MouseState *s)
 576 {
 577     unsigned int b;
 578     int dx1, dy1, dz1;
 579
 580     dx1 = s->mouse_dx;
 581     dy1 = s->mouse_dy;
 582     dz1 = s->mouse_dz;
 583     /* XXX: increase range to 8 bits ? */
 584     if (dx1 > 127)
 585         dx1 = 127;
 586     else if (dx1 < -127)
 587         dx1 = -127;
 588     if (dy1 > 127)
 589         dy1 = 127;
 590     else if (dy1 < -127)
 591         dy1 = -127;
 592     b = 0x08 | ((dx1 < 0) << 4) | ((dy1 < 0) << 5) | (s->mouse_buttons & 0x07);
 593     ps2_queue(&s->common, b);
 594     ps2_queue(&s->common, dx1 & 0xff);
 595     ps2_queue(&s->common, dy1 & 0xff);
 596     /* extra byte for IMPS/2 or IMEX */
 597     switch(s->mouse_type) {
 598     default:
 599         break;
 600     case 3:
 601         if (dz1 > 127)
 602             dz1 = 127;
 603         else if (dz1 < -127)
 604                 dz1 = -127;
 605         ps2_queue(&s->common, dz1 & 0xff);
 606         break;
 607     case 4:
 608         if (dz1 > 7)
 609             dz1 = 7;
 610         else if (dz1 < -7)
 611             dz1 = -7;
 612         b = (dz1 & 0x0f) | ((s->mouse_buttons & 0x18) << 1);
 613         ps2_queue(&s->common, b);
 614         break;
 615     }
 616
 617     trace_ps2_mouse_send_packet(s, dx1, dy1, dz1, b);
 618     /* update deltas */
 619     s->mouse_dx -= dx1;
 620     s->mouse_dy -= dy1;
 621     s->mouse_dz -= dz1;
 622 }
 623
 624 static void ps2_mouse_event(DeviceState *dev, QemuConsole *src,
 625                             InputEvent *evt)
 626 {
 627     static const int bmap[INPUT_BUTTON__MAX] = {
 628         [INPUT_BUTTON_LEFT]   = PS2_MOUSE_BUTTON_LEFT,
 629         [INPUT_BUTTON_MIDDLE] = PS2_MOUSE_BUTTON_MIDDLE,
 630         [INPUT_BUTTON_RIGHT]  = PS2_MOUSE_BUTTON_RIGHT,
 631         [INPUT_BUTTON_SIDE]   = PS2_MOUSE_BUTTON_SIDE,
 632         [INPUT_BUTTON_EXTRA]  = PS2_MOUSE_BUTTON_EXTRA,
 633     };
 634     PS2MouseState *s = (PS2MouseState *)dev;
 635     InputMoveEvent *move;
 636     InputBtnEvent *btn;
 637
 638     /* check if deltas are recorded when disabled */
 639     if (!(s->mouse_status & MOUSE_STATUS_ENABLED))
 640         return;
 641
 642     switch (evt->type) {
 643     case INPUT_EVENT_KIND_REL:
 644         move = evt->u.rel.data;
 645         if (move->axis == INPUT_AXIS_X) {
 646             s->mouse_dx += move->value;
 647         } else if (move->axis == INPUT_AXIS_Y) {
 648             s->mouse_dy -= move->value;
 649         }
 650         break;
 651
 652     case INPUT_EVENT_KIND_BTN:
 653         btn = evt->u.btn.data;
 654         if (btn->down) {
 655             s->mouse_buttons |= bmap[btn->button];
 656             if (btn->button == INPUT_BUTTON_WHEEL_UP) {
 657                 s->mouse_dz--;
 658             } else if (btn->button == INPUT_BUTTON_WHEEL_DOWN) {
 659                 s->mouse_dz++;
 660             }
 661         } else {
 662             s->mouse_buttons &= ~bmap[btn->button];
 663         }
 664         break;
 665
 666     default:
 667         /* keep gcc happy */
 668         break;
 669     }
 670 }
 671
 672 static void ps2_mouse_sync(DeviceState *dev)
 673 {
 674     PS2MouseState *s = (PS2MouseState *)dev;
 675
 676     if (s->mouse_buttons) {
 677         qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 678     }
 679     if (!(s->mouse_status & MOUSE_STATUS_REMOTE)) {
 680         while (s->common.queue.count < PS2_QUEUE_SIZE - 4) {
 681             /* if not remote, send event. Multiple events are sent if
 682                too big deltas */
 683             ps2_mouse_send_packet(s);
 684             if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0)
 685                 break;
 686         }
 687     }
 688 }
 689
 690 void ps2_mouse_fake_event(void *opaque)
 691 {
 692     PS2MouseState *s = opaque;
 693     trace_ps2_mouse_fake_event(opaque);
 694     s->mouse_dx++;
 695     ps2_mouse_sync(opaque);
 696 }
 697
 698 void ps2_write_mouse(void *opaque, int val)
 699 {
 700     PS2MouseState *s = (PS2MouseState *)opaque;
 701
 702     trace_ps2_write_mouse(opaque, val);
 703 #ifdef DEBUG_MOUSE
 704     printf("kbd: write mouse 0x%02x\n", val);
 705 #endif
 706     switch(s->common.write_cmd) {
 707     default:
 708     case -1:
 709         /* mouse command */
 710         if (s->mouse_wrap) {
 711             if (val == AUX_RESET_WRAP) {
 712                 s->mouse_wrap = 0;
 713                 ps2_queue(&s->common, AUX_ACK);
 714                 return;
 715             } else if (val != AUX_RESET) {
 716                 ps2_queue(&s->common, val);
 717                 return;
 718             }
 719         }
 720         switch(val) {
 721         case AUX_SET_SCALE11:
 722             s->mouse_status &= ~MOUSE_STATUS_SCALE21;
 723             ps2_queue(&s->common, AUX_ACK);
 724             break;
 725         case AUX_SET_SCALE21:
 726             s->mouse_status |= MOUSE_STATUS_SCALE21;
 727             ps2_queue(&s->common, AUX_ACK);
 728             break;
 729         case AUX_SET_STREAM:
 730             s->mouse_status &= ~MOUSE_STATUS_REMOTE;
 731             ps2_queue(&s->common, AUX_ACK);
 732             break;
 733         case AUX_SET_WRAP:
 734             s->mouse_wrap = 1;
 735             ps2_queue(&s->common, AUX_ACK);
 736             break;
 737         case AUX_SET_REMOTE:
 738             s->mouse_status |= MOUSE_STATUS_REMOTE;
 739             ps2_queue(&s->common, AUX_ACK);
 740             break;
 741         case AUX_GET_TYPE:
 742             ps2_queue(&s->common, AUX_ACK);
 743             ps2_queue(&s->common, s->mouse_type);
 744             break;
 745         case AUX_SET_RES:
 746         case AUX_SET_SAMPLE:
 747             s->common.write_cmd = val;
 748             ps2_queue(&s->common, AUX_ACK);
 749             break;
 750         case AUX_GET_SCALE:
 751             ps2_queue(&s->common, AUX_ACK);
 752             ps2_queue(&s->common, s->mouse_status);
 753             ps2_queue(&s->common, s->mouse_resolution);
 754             ps2_queue(&s->common, s->mouse_sample_rate);
 755             break;
 756         case AUX_POLL:
 757             ps2_queue(&s->common, AUX_ACK);
 758             ps2_mouse_send_packet(s);
 759             break;
 760         case AUX_ENABLE_DEV:
 761             s->mouse_status |= MOUSE_STATUS_ENABLED;
 762             ps2_queue(&s->common, AUX_ACK);
 763             break;
 764         case AUX_DISABLE_DEV:
 765             s->mouse_status &= ~MOUSE_STATUS_ENABLED;
 766             ps2_queue(&s->common, AUX_ACK);
 767             break;
 768         case AUX_SET_DEFAULT:
 769             s->mouse_sample_rate = 100;
 770             s->mouse_resolution = 2;
 771             s->mouse_status = 0;
 772             ps2_queue(&s->common, AUX_ACK);
 773             break;
 774         case AUX_RESET:
 775             s->mouse_sample_rate = 100;
 776             s->mouse_resolution = 2;
 777             s->mouse_status = 0;
 778             s->mouse_type = 0;
 779             ps2_queue(&s->common, AUX_ACK);
 780             ps2_queue(&s->common, 0xaa);
 781             ps2_queue(&s->common, s->mouse_type);
 782             break;
 783         default:
 784             break;
 785         }
 786         break;
 787     case AUX_SET_SAMPLE:
 788         s->mouse_sample_rate = val;
 789         /* detect IMPS/2 or IMEX */
 790         switch(s->mouse_detect_state) {
 791         default:
 792         case 0:
 793             if (val == 200)
 794                 s->mouse_detect_state = 1;
 795             break;
 796         case 1:
 797             if (val == 100)
 798                 s->mouse_detect_state = 2;
 799             else if (val == 200)
 800                 s->mouse_detect_state = 3;
 801             else
 802                 s->mouse_detect_state = 0;
 803             break;
 804         case 2:
 805             if (val == 80)
 806                 s->mouse_type = 3; /* IMPS/2 */
 807             s->mouse_detect_state = 0;
 808             break;
 809         case 3:
 810             if (val == 80)
 811                 s->mouse_type = 4; /* IMEX */
 812             s->mouse_detect_state = 0;
 813             break;
 814         }
 815         ps2_queue(&s->common, AUX_ACK);
 816         s->common.write_cmd = -1;
 817         break;
 818     case AUX_SET_RES:
 819         s->mouse_resolution = val;
 820         ps2_queue(&s->common, AUX_ACK);
 821         s->common.write_cmd = -1;
 822         break;
 823     }
 824 }
 825
 826 static void ps2_common_reset(PS2State *s)
 827 {
 828     s->write_cmd = -1;
 829     ps2_reset_queue(s);
 830     s->update_irq(s->update_arg, 0);
 831 }
 832
 833 static void ps2_common_post_load(PS2State *s)
 834 {
 835     PS2Queue *q = &s->queue;
 836     uint8_t i, size;
 837     uint8_t tmp_data[PS2_QUEUE_SIZE];
 838
 839     /* set the useful data buffer queue size, < PS2_QUEUE_SIZE */
 840     size = (q->count < 0 || q->count > PS2_QUEUE_SIZE) ? 0 : q->count;
 841
 842     /* move the queue elements to the start of data array */
 843     for (i = 0; i < size; i++) {
 844         if (q->rptr < 0 || q->rptr >= sizeof(q->data)) {
 845             q->rptr = 0;
 846         }
 847         tmp_data[i] = q->data[q->rptr++];
 848     }
 849     memcpy(q->data, tmp_data, size);
 850
 851     /* reset rptr/wptr/count */
 852     q->rptr = 0;
 853     q->wptr = size;
 854     q->count = size;
 855     s->update_irq(s->update_arg, q->count != 0);
 856 }
 857
 858 static void ps2_kbd_reset(void *opaque)
 859 {
 860     PS2KbdState *s = (PS2KbdState *) opaque;
 861
 862     trace_ps2_kbd_reset(opaque);
 863     ps2_common_reset(&s->common);
 864     s->scan_enabled = 0;
 865     s->translate = 0;
 866     s->scancode_set = 2;
 867     s->modifiers = 0;
 868 }
 869
 870 static void ps2_mouse_reset(void *opaque)
 871 {
 872     PS2MouseState *s = (PS2MouseState *) opaque;
 873
 874     trace_ps2_mouse_reset(opaque);
 875     ps2_common_reset(&s->common);
 876     s->mouse_status = 0;
 877     s->mouse_resolution = 0;
 878     s->mouse_sample_rate = 0;
 879     s->mouse_wrap = 0;
 880     s->mouse_type = 0;
 881     s->mouse_detect_state = 0;
 882     s->mouse_dx = 0;
 883     s->mouse_dy = 0;
 884     s->mouse_dz = 0;
 885     s->mouse_buttons = 0;
 886 }
 887
 888 static const VMStateDescription vmstate_ps2_common = {
 889     .name = "PS2 Common State",
 890     .version_id = 3,
 891     .minimum_version_id = 2,
 892     .fields = (VMStateField[]) {
 893         VMSTATE_INT32(write_cmd, PS2State),
 894         VMSTATE_INT32(queue.rptr, PS2State),
 895         VMSTATE_INT32(queue.wptr, PS2State),
 896         VMSTATE_INT32(queue.count, PS2State),
 897         VMSTATE_BUFFER(queue.data, PS2State),
 898         VMSTATE_END_OF_LIST()
 899     }
 900 };
 901
 902 static bool ps2_keyboard_ledstate_needed(void *opaque)
 903 {
 904     PS2KbdState *s = opaque;
 905
 906     return s->ledstate != 0; /* 0 is default state */
 907 }
 908
 909 static int ps2_kbd_ledstate_post_load(void *opaque, int version_id)
 910 {
 911     PS2KbdState *s = opaque;
 912
 913     kbd_put_ledstate(s->ledstate);
 914     return 0;
 915 }
 916
 917 static const VMStateDescription vmstate_ps2_keyboard_ledstate = {
 918     .name = "ps2kbd/ledstate",
 919     .version_id = 3,
 920     .minimum_version_id = 2,
 921     .post_load = ps2_kbd_ledstate_post_load,
 922     .needed = ps2_keyboard_ledstate_needed,
 923     .fields = (VMStateField[]) {
 924         VMSTATE_INT32(ledstate, PS2KbdState),
 925         VMSTATE_END_OF_LIST()
 926     }
 927 };
 928
 929 static bool ps2_keyboard_need_high_bit_needed(void *opaque)
 930 {
 931     PS2KbdState *s = opaque;
 932     return s->need_high_bit != 0; /* 0 is the usual state */
 933 }
 934
 935 static const VMStateDescription vmstate_ps2_keyboard_need_high_bit = {
 936     .name = "ps2kbd/need_high_bit",
 937     .version_id = 1,
 938     .minimum_version_id = 1,
 939     .needed = ps2_keyboard_need_high_bit_needed,
 940     .fields = (VMStateField[]) {
 941         VMSTATE_BOOL(need_high_bit, PS2KbdState),
 942         VMSTATE_END_OF_LIST()
 943     }
 944 };
 945
 946 static int ps2_kbd_post_load(void* opaque, int version_id)
 947 {
 948     PS2KbdState *s = (PS2KbdState*)opaque;
 949     PS2State *ps2 = &s->common;
 950
 951     if (version_id == 2)
 952         s->scancode_set=2;
 953
 954     ps2_common_post_load(ps2);
 955
 956     return 0;
 957 }
 958
 959 static int ps2_kbd_pre_save(void *opaque)
 960 {
 961     PS2KbdState *s = (PS2KbdState *)opaque;
 962     PS2State *ps2 = &s->common;
 963
 964     ps2_common_post_load(ps2);
 965
 966     return 0;
 967 }
 968
 969 static const VMStateDescription vmstate_ps2_keyboard = {
 970     .name = "ps2kbd",
 971     .version_id = 3,
 972     .minimum_version_id = 2,
 973     .post_load = ps2_kbd_post_load,
 974     .pre_save = ps2_kbd_pre_save,
 975     .fields = (VMStateField[]) {
 976         VMSTATE_STRUCT(common, PS2KbdState, 0, vmstate_ps2_common, PS2State),
 977         VMSTATE_INT32(scan_enabled, PS2KbdState),
 978         VMSTATE_INT32(translate, PS2KbdState),
 979         VMSTATE_INT32_V(scancode_set, PS2KbdState,3),
 980         VMSTATE_END_OF_LIST()
 981     },
 982     .subsections = (const VMStateDescription*[]) {
 983         &vmstate_ps2_keyboard_ledstate,
 984         &vmstate_ps2_keyboard_need_high_bit,
 985         NULL
 986     }
 987 };
 988
 989 static int ps2_mouse_post_load(void *opaque, int version_id)
 990 {
 991     PS2MouseState *s = (PS2MouseState *)opaque;
 992     PS2State *ps2 = &s->common;
 993
 994     ps2_common_post_load(ps2);
 995
 996     return 0;
 997 }
 998
 999 static int ps2_mouse_pre_save(void *opaque)
1000 {
1001     PS2MouseState *s = (PS2MouseState *)opaque;
1002     PS2State *ps2 = &s->common;
1003
1004     ps2_common_post_load(ps2);
1005
1006     return 0;
1007 }
1008
1009 static const VMStateDescription vmstate_ps2_mouse = {
1010     .name = "ps2mouse",
1011     .version_id = 2,
1012     .minimum_version_id = 2,
1013     .post_load = ps2_mouse_post_load,
1014     .pre_save = ps2_mouse_pre_save,
1015     .fields = (VMStateField[]) {
1016         VMSTATE_STRUCT(common, PS2MouseState, 0, vmstate_ps2_common, PS2State),
1017         VMSTATE_UINT8(mouse_status, PS2MouseState),
1018         VMSTATE_UINT8(mouse_resolution, PS2MouseState),
1019         VMSTATE_UINT8(mouse_sample_rate, PS2MouseState),
1020         VMSTATE_UINT8(mouse_wrap, PS2MouseState),
1021         VMSTATE_UINT8(mouse_type, PS2MouseState),
1022         VMSTATE_UINT8(mouse_detect_state, PS2MouseState),
1023         VMSTATE_INT32(mouse_dx, PS2MouseState),
1024         VMSTATE_INT32(mouse_dy, PS2MouseState),
1025         VMSTATE_INT32(mouse_dz, PS2MouseState),
1026         VMSTATE_UINT8(mouse_buttons, PS2MouseState),
1027         VMSTATE_END_OF_LIST()
1028     }
1029 };
1030
1031 static QemuInputHandler ps2_keyboard_handler = {
1032     .name  = "QEMU PS/2 Keyboard",
1033     .mask  = INPUT_EVENT_MASK_KEY,
1034     .event = ps2_keyboard_event,
1035 };
1036
1037 void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg)
1038 {
1039     PS2KbdState *s = (PS2KbdState *)g_malloc0(sizeof(PS2KbdState));
1040
1041     trace_ps2_kbd_init(s);
1042     s->common.update_irq = update_irq;
1043     s->common.update_arg = update_arg;
1044     s->scancode_set = 2;
1045     vmstate_register(NULL, 0, &vmstate_ps2_keyboard, s);
1046     qemu_input_handler_register((DeviceState *)s,
1047                                 &ps2_keyboard_handler);
1048     qemu_register_reset(ps2_kbd_reset, s);
1049     return s;
1050 }
1051
1052 static QemuInputHandler ps2_mouse_handler = {
1053     .name  = "QEMU PS/2 Mouse",
1054     .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
1055     .event = ps2_mouse_event,
1056     .sync  = ps2_mouse_sync,
1057 };
1058
1059 void *ps2_mouse_init(void (*update_irq)(void *, int), void *update_arg)
1060 {
1061     PS2MouseState *s = (PS2MouseState *)g_malloc0(sizeof(PS2MouseState));
1062
1063     trace_ps2_mouse_init(s);
1064     s->common.update_irq = update_irq;
1065     s->common.update_arg = update_arg;
1066     vmstate_register(NULL, 0, &vmstate_ps2_mouse, s);
1067     qemu_input_handler_register((DeviceState *)s,
1068                                 &ps2_mouse_handler);
1069     qemu_register_reset(ps2_mouse_reset, s);
1070     return s;
1071 }