static int adb_kbd_request(ADBDevice *d, uint8_t *obuf, const uint8_t *buf, int len) { KBDState *s = ADB_KEYBOARD(d); int cmd, reg, olen; if ((buf[0] & 0x0f) == ADB_FLUSH) { /* flush keyboard fifo */ s->wptr = s->rptr = s->count = 0; return 0; } cmd = buf[0] & 0xc; reg = buf[0] & 0x3; olen = 0; switch(cmd) { case ADB_WRITEREG: switch(reg) { case 2: /* LED status */ break; case 3: switch(buf[2]) { case ADB_CMD_SELF_TEST: break; case ADB_CMD_CHANGE_ID: case ADB_CMD_CHANGE_ID_AND_ACT: case ADB_CMD_CHANGE_ID_AND_ENABLE: d->devaddr = buf[1] & 0xf; break; default: d->devaddr = buf[1] & 0xf; /* we support handlers: * 1: Apple Standard Keyboard * 2: Apple Extended Keyboard (LShift = RShift) * 3: Apple Extended Keyboard (LShift != RShift) */ if (buf[2] == 1 || buf[2] == 2 || buf[2] == 3) { d->handler = buf[2]; } break; } } break; case ADB_READREG: switch(reg) { case 0: olen = adb_kbd_poll(d, obuf); break; case 1: break; case 2: obuf[0] = 0x00; /* XXX: check this */ obuf[1] = 0x07; /* led status */ olen = 2; break; case 3: obuf[0] = d->handler; obuf[1] = d->devaddr; olen = 2; break; } break; } return olen; }