Split adb.c into adb.c, adb-mouse.c and adb-kbd.c (77cb0f5a) · Commits · SUMMER2020 / students / proj-2021291

hw/input/Makefile.objs

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		common-obj-$(CONFIG_ADB) += adb.o
		common-obj-$(CONFIG_ADB) += adb.o adb-mouse.o adb-kbd.o
		common-obj-y += hid.o
		common-obj-$(CONFIG_LM832X) += lm832x.o
		common-obj-$(CONFIG_PCKBD) += pckbd.o

hw/input/adb-internal.h

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		/*
		* QEMU ADB support
		*
		* Copyright (c) 2004 Fabrice Bellard
		*
		* Permission is hereby granted, free of charge, to any person obtaining a copy
		* of this software and associated documentation files (the "Software"), to deal
		* in the Software without restriction, including without limitation the rights
		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
		* copies of the Software, and to permit persons to whom the Software is
		* furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice shall be included in
		* all copies or substantial portions of the Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
		* THE SOFTWARE.
		*/

		/* ADB commands */

		#define ADB_BUSRESET 0x00
		#define ADB_FLUSH 0x01
		#define ADB_WRITEREG 0x08
		#define ADB_READREG 0x0c

		/* ADB device commands */

		#define ADB_CMD_SELF_TEST 0xff
		#define ADB_CMD_CHANGE_ID 0xfe
		#define ADB_CMD_CHANGE_ID_AND_ACT 0xfd
		#define ADB_CMD_CHANGE_ID_AND_ENABLE 0x00

		/* ADB default device IDs (upper 4 bits of ADB command byte) */

		#define ADB_DEVID_DONGLE 1
		#define ADB_DEVID_KEYBOARD 2
		#define ADB_DEVID_MOUSE 3
		#define ADB_DEVID_TABLET 4
		#define ADB_DEVID_MODEM 5
		#define ADB_DEVID_MISC 7

		extern const VMStateDescription vmstate_adb_device;

hw/input/adb-kbd.c

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Original line number	Diff line number	Diff line
		/*
		* QEMU ADB keyboard support
		*
		* Copyright (c) 2004 Fabrice Bellard
		*
		* Permission is hereby granted, free of charge, to any person obtaining a copy
		* of this software and associated documentation files (the "Software"), to deal
		* in the Software without restriction, including without limitation the rights
		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
		* copies of the Software, and to permit persons to whom the Software is
		* furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice shall be included in
		* all copies or substantial portions of the Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
		* THE SOFTWARE.
		*/
		#include "qemu/osdep.h"
		#include "hw/input/adb.h"
		#include "ui/input.h"
		#include "hw/input/adb-keys.h"
		#include "sysemu/sysemu.h"
		#include "adb-internal.h"
		#include "trace.h"

		#define ADB_KEYBOARD(obj) OBJECT_CHECK(KBDState, (obj), TYPE_ADB_KEYBOARD)

		typedef struct KBDState {
		/< private >/
		ADBDevice parent_obj;
		/< public >/

		uint8_t data[128];
		int rptr, wptr, count;
		} KBDState;

		#define ADB_KEYBOARD_CLASS(class) \
		OBJECT_CLASS_CHECK(ADBKeyboardClass, (class), TYPE_ADB_KEYBOARD)
		#define ADB_KEYBOARD_GET_CLASS(obj) \
		OBJECT_GET_CLASS(ADBKeyboardClass, (obj), TYPE_ADB_KEYBOARD)

		typedef struct ADBKeyboardClass {
		/< private >/
		ADBDeviceClass parent_class;
		/< public >/

		DeviceRealize parent_realize;
		} ADBKeyboardClass;

		/* The adb keyboard doesn't have every key imaginable */
		#define NO_KEY 0xff

		int qcode_to_adb_keycode[] = {
		/* Make sure future additions are automatically set to NO_KEY */
		[0 ... 0xff] = NO_KEY,

		[Q_KEY_CODE_SHIFT] = ADB_KEY_LEFT_SHIFT,
		[Q_KEY_CODE_SHIFT_R] = ADB_KEY_RIGHT_SHIFT,
		[Q_KEY_CODE_ALT] = ADB_KEY_LEFT_OPTION,
		[Q_KEY_CODE_ALT_R] = ADB_KEY_RIGHT_OPTION,
		[Q_KEY_CODE_CTRL] = ADB_KEY_LEFT_CONTROL,
		[Q_KEY_CODE_CTRL_R] = ADB_KEY_RIGHT_CONTROL,
		[Q_KEY_CODE_META_L] = ADB_KEY_COMMAND,
		[Q_KEY_CODE_META_R] = ADB_KEY_COMMAND,
		[Q_KEY_CODE_SPC] = ADB_KEY_SPACEBAR,

		[Q_KEY_CODE_ESC] = ADB_KEY_ESC,
		[Q_KEY_CODE_1] = ADB_KEY_1,
		[Q_KEY_CODE_2] = ADB_KEY_2,
		[Q_KEY_CODE_3] = ADB_KEY_3,
		[Q_KEY_CODE_4] = ADB_KEY_4,
		[Q_KEY_CODE_5] = ADB_KEY_5,
		[Q_KEY_CODE_6] = ADB_KEY_6,
		[Q_KEY_CODE_7] = ADB_KEY_7,
		[Q_KEY_CODE_8] = ADB_KEY_8,
		[Q_KEY_CODE_9] = ADB_KEY_9,
		[Q_KEY_CODE_0] = ADB_KEY_0,
		[Q_KEY_CODE_MINUS] = ADB_KEY_MINUS,
		[Q_KEY_CODE_EQUAL] = ADB_KEY_EQUAL,
		[Q_KEY_CODE_BACKSPACE] = ADB_KEY_DELETE,
		[Q_KEY_CODE_TAB] = ADB_KEY_TAB,
		[Q_KEY_CODE_Q] = ADB_KEY_Q,
		[Q_KEY_CODE_W] = ADB_KEY_W,
		[Q_KEY_CODE_E] = ADB_KEY_E,
		[Q_KEY_CODE_R] = ADB_KEY_R,
		[Q_KEY_CODE_T] = ADB_KEY_T,
		[Q_KEY_CODE_Y] = ADB_KEY_Y,
		[Q_KEY_CODE_U] = ADB_KEY_U,
		[Q_KEY_CODE_I] = ADB_KEY_I,
		[Q_KEY_CODE_O] = ADB_KEY_O,
		[Q_KEY_CODE_P] = ADB_KEY_P,
		[Q_KEY_CODE_BRACKET_LEFT] = ADB_KEY_LEFT_BRACKET,
		[Q_KEY_CODE_BRACKET_RIGHT] = ADB_KEY_RIGHT_BRACKET,
		[Q_KEY_CODE_RET] = ADB_KEY_RETURN,
		[Q_KEY_CODE_A] = ADB_KEY_A,
		[Q_KEY_CODE_S] = ADB_KEY_S,
		[Q_KEY_CODE_D] = ADB_KEY_D,
		[Q_KEY_CODE_F] = ADB_KEY_F,
		[Q_KEY_CODE_G] = ADB_KEY_G,
		[Q_KEY_CODE_H] = ADB_KEY_H,
		[Q_KEY_CODE_J] = ADB_KEY_J,
		[Q_KEY_CODE_K] = ADB_KEY_K,
		[Q_KEY_CODE_L] = ADB_KEY_L,
		[Q_KEY_CODE_SEMICOLON] = ADB_KEY_SEMICOLON,
		[Q_KEY_CODE_APOSTROPHE] = ADB_KEY_APOSTROPHE,
		[Q_KEY_CODE_GRAVE_ACCENT] = ADB_KEY_GRAVE_ACCENT,
		[Q_KEY_CODE_BACKSLASH] = ADB_KEY_BACKSLASH,
		[Q_KEY_CODE_Z] = ADB_KEY_Z,
		[Q_KEY_CODE_X] = ADB_KEY_X,
		[Q_KEY_CODE_C] = ADB_KEY_C,
		[Q_KEY_CODE_V] = ADB_KEY_V,
		[Q_KEY_CODE_B] = ADB_KEY_B,
		[Q_KEY_CODE_N] = ADB_KEY_N,
		[Q_KEY_CODE_M] = ADB_KEY_M,
		[Q_KEY_CODE_COMMA] = ADB_KEY_COMMA,
		[Q_KEY_CODE_DOT] = ADB_KEY_PERIOD,
		[Q_KEY_CODE_SLASH] = ADB_KEY_FORWARD_SLASH,
		[Q_KEY_CODE_ASTERISK] = ADB_KEY_KP_MULTIPLY,
		[Q_KEY_CODE_CAPS_LOCK] = ADB_KEY_CAPS_LOCK,

		[Q_KEY_CODE_F1] = ADB_KEY_F1,
		[Q_KEY_CODE_F2] = ADB_KEY_F2,
		[Q_KEY_CODE_F3] = ADB_KEY_F3,
		[Q_KEY_CODE_F4] = ADB_KEY_F4,
		[Q_KEY_CODE_F5] = ADB_KEY_F5,
		[Q_KEY_CODE_F6] = ADB_KEY_F6,
		[Q_KEY_CODE_F7] = ADB_KEY_F7,
		[Q_KEY_CODE_F8] = ADB_KEY_F8,
		[Q_KEY_CODE_F9] = ADB_KEY_F9,
		[Q_KEY_CODE_F10] = ADB_KEY_F10,
		[Q_KEY_CODE_F11] = ADB_KEY_F11,
		[Q_KEY_CODE_F12] = ADB_KEY_F12,
		[Q_KEY_CODE_PRINT] = ADB_KEY_F13,
		[Q_KEY_CODE_SYSRQ] = ADB_KEY_F13,
		[Q_KEY_CODE_SCROLL_LOCK] = ADB_KEY_F14,
		[Q_KEY_CODE_PAUSE] = ADB_KEY_F15,

		[Q_KEY_CODE_NUM_LOCK] = ADB_KEY_KP_CLEAR,
		[Q_KEY_CODE_KP_EQUALS] = ADB_KEY_KP_EQUAL,
		[Q_KEY_CODE_KP_DIVIDE] = ADB_KEY_KP_DIVIDE,
		[Q_KEY_CODE_KP_MULTIPLY] = ADB_KEY_KP_MULTIPLY,
		[Q_KEY_CODE_KP_SUBTRACT] = ADB_KEY_KP_SUBTRACT,
		[Q_KEY_CODE_KP_ADD] = ADB_KEY_KP_PLUS,
		[Q_KEY_CODE_KP_ENTER] = ADB_KEY_KP_ENTER,
		[Q_KEY_CODE_KP_DECIMAL] = ADB_KEY_KP_PERIOD,
		[Q_KEY_CODE_KP_0] = ADB_KEY_KP_0,
		[Q_KEY_CODE_KP_1] = ADB_KEY_KP_1,
		[Q_KEY_CODE_KP_2] = ADB_KEY_KP_2,
		[Q_KEY_CODE_KP_3] = ADB_KEY_KP_3,
		[Q_KEY_CODE_KP_4] = ADB_KEY_KP_4,
		[Q_KEY_CODE_KP_5] = ADB_KEY_KP_5,
		[Q_KEY_CODE_KP_6] = ADB_KEY_KP_6,
		[Q_KEY_CODE_KP_7] = ADB_KEY_KP_7,
		[Q_KEY_CODE_KP_8] = ADB_KEY_KP_8,
		[Q_KEY_CODE_KP_9] = ADB_KEY_KP_9,

		[Q_KEY_CODE_UP] = ADB_KEY_UP,
		[Q_KEY_CODE_DOWN] = ADB_KEY_DOWN,
		[Q_KEY_CODE_LEFT] = ADB_KEY_LEFT,
		[Q_KEY_CODE_RIGHT] = ADB_KEY_RIGHT,

		[Q_KEY_CODE_HELP] = ADB_KEY_HELP,
		[Q_KEY_CODE_INSERT] = ADB_KEY_HELP,
		[Q_KEY_CODE_DELETE] = ADB_KEY_FORWARD_DELETE,
		[Q_KEY_CODE_HOME] = ADB_KEY_HOME,
		[Q_KEY_CODE_END] = ADB_KEY_END,
		[Q_KEY_CODE_PGUP] = ADB_KEY_PAGE_UP,
		[Q_KEY_CODE_PGDN] = ADB_KEY_PAGE_DOWN,

		[Q_KEY_CODE_POWER] = ADB_KEY_POWER
		};

		static void adb_kbd_put_keycode(void *opaque, int keycode)
		{
		KBDState *s = opaque;

		if (s->count < sizeof(s->data)) {
		s->data[s->wptr] = keycode;
		if (++s->wptr == sizeof(s->data)) {
		s->wptr = 0;
		}
		s->count++;
		}
		}

		static int adb_kbd_poll(ADBDevice d, uint8_t obuf)
		{
		KBDState *s = ADB_KEYBOARD(d);
		int keycode;
		int olen;

		olen = 0;
		if (s->count == 0) {
		return 0;
		}
		keycode = s->data[s->rptr];
		s->rptr++;
		if (s->rptr == sizeof(s->data)) {
		s->rptr = 0;
		}
		s->count--;
		/*
		* The power key is the only two byte value key, so it is a special case.
		* Since 0x7f is not a used keycode for ADB we overload it to indicate the
		* power button when we're storing keycodes in our internal buffer, and
		* expand it out to two bytes when we send to the guest.
		*/
		if (keycode == 0x7f) {
		obuf[0] = 0x7f;
		obuf[1] = 0x7f;
		olen = 2;
		} else {
		obuf[0] = keycode;
		/* NOTE: the power key key-up is the two byte sequence 0xff 0xff;
		* otherwise we could in theory send a second keycode in the second
		* byte, but choose not to bother.
		*/
		obuf[1] = 0xff;
		olen = 2;
		}

		return olen;
		}

		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:
		trace_adb_kbd_writereg(reg, buf[1]);
		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;
		}
		trace_adb_kbd_readreg(reg, obuf[0], obuf[1]);
		break;
		}
		return olen;
		}

		/* This is where keyboard events enter this file */
		static void adb_keyboard_event(DeviceState dev, QemuConsole src,
		InputEvent *evt)
		{
		KBDState s = (KBDState )dev;
		int qcode, keycode;

		qcode = qemu_input_key_value_to_qcode(evt->u.key.data->key);
		if (qcode >= ARRAY_SIZE(qcode_to_adb_keycode)) {
		return;
		}
		/* FIXME: take handler into account when translating qcode */
		keycode = qcode_to_adb_keycode[qcode];
		if (keycode == NO_KEY) { /* We don't want to send this to the guest */
		trace_adb_kbd_no_key();
		return;
		}
		if (evt->u.key.data->down == false) { /* if key release event */
		keycode = keycode \| 0x80; /* create keyboard break code */
		}

		adb_kbd_put_keycode(s, keycode);
		}

		static const VMStateDescription vmstate_adb_kbd = {
		.name = "adb_kbd",
		.version_id = 2,
		.minimum_version_id = 2,
		.fields = (VMStateField[]) {
		VMSTATE_STRUCT(parent_obj, KBDState, 0, vmstate_adb_device, ADBDevice),
		VMSTATE_BUFFER(data, KBDState),
		VMSTATE_INT32(rptr, KBDState),
		VMSTATE_INT32(wptr, KBDState),
		VMSTATE_INT32(count, KBDState),
		VMSTATE_END_OF_LIST()
		}
		};

		static void adb_kbd_reset(DeviceState *dev)
		{
		ADBDevice *d = ADB_DEVICE(dev);
		KBDState *s = ADB_KEYBOARD(dev);

		d->handler = 1;
		d->devaddr = ADB_DEVID_KEYBOARD;
		memset(s->data, 0, sizeof(s->data));
		s->rptr = 0;
		s->wptr = 0;
		s->count = 0;
		}

		static QemuInputHandler adb_keyboard_handler = {
		.name = "QEMU ADB Keyboard",
		.mask = INPUT_EVENT_MASK_KEY,
		.event = adb_keyboard_event,
		};

		static void adb_kbd_realizefn(DeviceState dev, Error *errp)
		{
		ADBKeyboardClass *akc = ADB_KEYBOARD_GET_CLASS(dev);
		akc->parent_realize(dev, errp);
		qemu_input_handler_register(dev, &adb_keyboard_handler);
		}

		static void adb_kbd_initfn(Object *obj)
		{
		ADBDevice *d = ADB_DEVICE(obj);

		d->devaddr = ADB_DEVID_KEYBOARD;
		}

		static void adb_kbd_class_init(ObjectClass oc, void data)
		{
		DeviceClass *dc = DEVICE_CLASS(oc);
		ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc);
		ADBKeyboardClass *akc = ADB_KEYBOARD_CLASS(oc);

		akc->parent_realize = dc->realize;
		dc->realize = adb_kbd_realizefn;
		set_bit(DEVICE_CATEGORY_INPUT, dc->categories);

		adc->devreq = adb_kbd_request;
		dc->reset = adb_kbd_reset;
		dc->vmsd = &vmstate_adb_kbd;
		}

		static const TypeInfo adb_kbd_type_info = {
		.name = TYPE_ADB_KEYBOARD,
		.parent = TYPE_ADB_DEVICE,
		.instance_size = sizeof(KBDState),
		.instance_init = adb_kbd_initfn,
		.class_init = adb_kbd_class_init,
		.class_size = sizeof(ADBKeyboardClass),
		};

		static void adb_kbd_register_types(void)
		{
		type_register_static(&adb_kbd_type_info);
		}

		type_init(adb_kbd_register_types)

hw/input/adb-mouse.c

0 → 100644

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Original line number	Diff line number	Diff line
		/*
		* QEMU ADB mouse support
		*
		* Copyright (c) 2004 Fabrice Bellard
		*
		* Permission is hereby granted, free of charge, to any person obtaining a copy
		* of this software and associated documentation files (the "Software"), to deal
		* in the Software without restriction, including without limitation the rights
		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
		* copies of the Software, and to permit persons to whom the Software is
		* furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice shall be included in
		* all copies or substantial portions of the Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
		* THE SOFTWARE.
		*/
		#include "qemu/osdep.h"
		#include "ui/console.h"
		#include "hw/input/adb.h"
		#include "adb-internal.h"
		#include "trace.h"

		#define ADB_MOUSE(obj) OBJECT_CHECK(MouseState, (obj), TYPE_ADB_MOUSE)

		typedef struct MouseState {
		/< public >/
		ADBDevice parent_obj;
		/< private >/

		int buttons_state, last_buttons_state;
		int dx, dy, dz;
		} MouseState;

		#define ADB_MOUSE_CLASS(class) \
		OBJECT_CLASS_CHECK(ADBMouseClass, (class), TYPE_ADB_MOUSE)
		#define ADB_MOUSE_GET_CLASS(obj) \
		OBJECT_GET_CLASS(ADBMouseClass, (obj), TYPE_ADB_MOUSE)

		typedef struct ADBMouseClass {
		/< public >/
		ADBDeviceClass parent_class;
		/< private >/

		DeviceRealize parent_realize;
		} ADBMouseClass;

		static void adb_mouse_event(void *opaque,
		int dx1, int dy1, int dz1, int buttons_state)
		{
		MouseState *s = opaque;

		s->dx += dx1;
		s->dy += dy1;
		s->dz += dz1;
		s->buttons_state = buttons_state;
		}


		static int adb_mouse_poll(ADBDevice d, uint8_t obuf)
		{
		MouseState *s = ADB_MOUSE(d);
		int dx, dy;

		if (s->last_buttons_state == s->buttons_state &&
		s->dx == 0 && s->dy == 0) {
		return 0;
		}

		dx = s->dx;
		if (dx < -63) {
		dx = -63;
		} else if (dx > 63) {
		dx = 63;
		}

		dy = s->dy;
		if (dy < -63) {
		dy = -63;
		} else if (dy > 63) {
		dy = 63;
		}

		s->dx -= dx;
		s->dy -= dy;
		s->last_buttons_state = s->buttons_state;

		dx &= 0x7f;
		dy &= 0x7f;

		if (!(s->buttons_state & MOUSE_EVENT_LBUTTON)) {
		dy \|= 0x80;
		}
		if (!(s->buttons_state & MOUSE_EVENT_RBUTTON)) {
		dx \|= 0x80;
		}

		obuf[0] = dy;
		obuf[1] = dx;
		return 2;
		}

		static int adb_mouse_request(ADBDevice d, uint8_t obuf,
		const uint8_t *buf, int len)
		{
		MouseState *s = ADB_MOUSE(d);
		int cmd, reg, olen;

		if ((buf[0] & 0x0f) == ADB_FLUSH) {
		/* flush mouse fifo */
		s->buttons_state = s->last_buttons_state;
		s->dx = 0;
		s->dy = 0;
		s->dz = 0;
		return 0;
		}

		cmd = buf[0] & 0xc;
		reg = buf[0] & 0x3;
		olen = 0;
		switch (cmd) {
		case ADB_WRITEREG:
		trace_adb_mouse_writereg(reg, buf[1]);
		switch (reg) {
		case 2:
		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:
		* 0x01: Classic Apple Mouse Protocol / 100 cpi operations
		* 0x02: Classic Apple Mouse Protocol / 200 cpi operations
		* we don't support handlers (at least):
		* 0x03: Mouse systems A3 trackball
		* 0x04: Extended Apple Mouse Protocol
		* 0x2f: Microspeed mouse
		* 0x42: Macally
		* 0x5f: Microspeed mouse
		* 0x66: Microspeed mouse
		*/
		if (buf[2] == 1 \|\| buf[2] == 2) {
		d->handler = buf[2];
		}
		break;
		}
		}
		break;
		case ADB_READREG:
		switch (reg) {
		case 0:
		olen = adb_mouse_poll(d, obuf);
		break;
		case 1:
		break;
		case 3:
		obuf[0] = d->handler;
		obuf[1] = d->devaddr;
		olen = 2;
		break;
		}
		trace_adb_mouse_readreg(reg, obuf[0], obuf[1]);
		break;
		}
		return olen;
		}

		static void adb_mouse_reset(DeviceState *dev)
		{
		ADBDevice *d = ADB_DEVICE(dev);
		MouseState *s = ADB_MOUSE(dev);

		d->handler = 2;
		d->devaddr = ADB_DEVID_MOUSE;
		s->last_buttons_state = s->buttons_state = 0;
		s->dx = s->dy = s->dz = 0;
		}

		static const VMStateDescription vmstate_adb_mouse = {
		.name = "adb_mouse",
		.version_id = 2,
		.minimum_version_id = 2,
		.fields = (VMStateField[]) {
		VMSTATE_STRUCT(parent_obj, MouseState, 0, vmstate_adb_device,
		ADBDevice),
		VMSTATE_INT32(buttons_state, MouseState),
		VMSTATE_INT32(last_buttons_state, MouseState),
		VMSTATE_INT32(dx, MouseState),
		VMSTATE_INT32(dy, MouseState),
		VMSTATE_INT32(dz, MouseState),
		VMSTATE_END_OF_LIST()
		}
		};

		static void adb_mouse_realizefn(DeviceState dev, Error *errp)
		{
		MouseState *s = ADB_MOUSE(dev);
		ADBMouseClass *amc = ADB_MOUSE_GET_CLASS(dev);

		amc->parent_realize(dev, errp);

		qemu_add_mouse_event_handler(adb_mouse_event, s, 0, "QEMU ADB Mouse");
		}

		static void adb_mouse_initfn(Object *obj)
		{
		ADBDevice *d = ADB_DEVICE(obj);

		d->devaddr = ADB_DEVID_MOUSE;
		}

		static void adb_mouse_class_init(ObjectClass oc, void data)
		{
		DeviceClass *dc = DEVICE_CLASS(oc);
		ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc);
		ADBMouseClass *amc = ADB_MOUSE_CLASS(oc);

		amc->parent_realize = dc->realize;
		dc->realize = adb_mouse_realizefn;
		set_bit(DEVICE_CATEGORY_INPUT, dc->categories);

		adc->devreq = adb_mouse_request;
		dc->reset = adb_mouse_reset;
		dc->vmsd = &vmstate_adb_mouse;
		}

		static const TypeInfo adb_mouse_type_info = {
		.name = TYPE_ADB_MOUSE,
		.parent = TYPE_ADB_DEVICE,
		.instance_size = sizeof(MouseState),
		.instance_init = adb_mouse_initfn,
		.class_init = adb_mouse_class_init,
		.class_size = sizeof(ADBMouseClass),
		};

		static void adb_mouse_register_types(void)
		{
		type_register_static(&adb_mouse_type_info);
		}

		type_init(adb_mouse_register_types)

hw/input/adb.c

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