psmouse-base.c

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	return 0;
}

/*
 * Bare PS/2 protocol "detection". Always succeeds.
 */
static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
{
	if (set_properties) {
		if (!psmouse->vendor) psmouse->vendor = "Generic";
		if (!psmouse->name) psmouse->name = "Mouse";
	}

	return 0;
}


/*
 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
 * the mouse may have.
 */

static int psmouse_extensions(struct psmouse *psmouse,
			      unsigned int max_proto, int set_properties)
{
	int synaptics_hardware = 0;

/*
 * We always check for lifebook because it does not disturb mouse
 * (it only checks DMI information).
 */
	if (lifebook_detect(psmouse, set_properties) == 0) {
		if (max_proto > PSMOUSE_IMEX) {
			if (!set_properties || lifebook_init(psmouse) == 0)
				return PSMOUSE_LIFEBOOK;
		}
	}

/*
 * Try Kensington ThinkingMouse (we try first, because synaptics probe
 * upsets the thinkingmouse).
 */

	if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
		return PSMOUSE_THINKPS;

/*
 * Try Synaptics TouchPad
 */
	if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
		synaptics_hardware = 1;

		if (max_proto > PSMOUSE_IMEX) {
			if (!set_properties || synaptics_init(psmouse) == 0)
				return PSMOUSE_SYNAPTICS;
/*
 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
 * Unfortunately Logitech/Genius probes confuse some firmware versions so
 * we'll have to skip them.
 */
			max_proto = PSMOUSE_IMEX;
		}
/*
 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
 */
		synaptics_reset(psmouse);
	}

/*
 * Try ALPS TouchPad
 */
	if (max_proto > PSMOUSE_IMEX) {
		ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
		if (alps_detect(psmouse, set_properties) == 0) {
			if (!set_properties || alps_init(psmouse) == 0)
				return PSMOUSE_ALPS;
/*
 * Init failed, try basic relative protocols
 */
			max_proto = PSMOUSE_IMEX;
		}
	}

	if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0)
		return PSMOUSE_GENPS;

	if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0)
		return PSMOUSE_PS2PP;

/*
 * Reset to defaults in case the device got confused by extended
 * protocol probes.
 */
	ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);

	if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
		return PSMOUSE_IMEX;

	if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
		return PSMOUSE_IMPS;

/*
 * Okay, all failed, we have a standard mouse here. The number of the buttons
 * is still a question, though. We assume 3.
 */
	ps2bare_detect(psmouse, set_properties);

	if (synaptics_hardware) {
/*
 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
 * We need to reset the touchpad because if there is a track point on the
 * pass through port it could get disabled while probing for protocol
 * extensions.
 */
		psmouse_reset(psmouse);
		ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
	}

	return PSMOUSE_PS2;
}

static struct psmouse_protocol psmouse_protocols[] = {
	{
		.type		= PSMOUSE_PS2,
		.name		= "PS/2",
		.alias		= "bare",
		.maxproto	= 1,
		.detect		= ps2bare_detect,
	},
	{
		.type		= PSMOUSE_PS2PP,
		.name		= "PS2++",
		.alias		= "logitech",
		.detect		= ps2pp_init,
	},
	{
		.type		= PSMOUSE_THINKPS,
		.name		= "ThinkPS/2",
		.alias		= "thinkps",
		.detect		= thinking_detect,
	},
	{
		.type		= PSMOUSE_GENPS,
		.name		= "GenPS/2",
		.alias		= "genius",
		.detect		= genius_detect,
	},
	{
		.type		= PSMOUSE_IMPS,
		.name		= "ImPS/2",
		.alias		= "imps",
		.maxproto	= 1,
		.detect		= intellimouse_detect,
	},
	{
		.type		= PSMOUSE_IMEX,
		.name		= "ImExPS/2",
		.alias		= "exps",
		.maxproto	= 1,
		.detect		= im_explorer_detect,
	},
	{
		.type		= PSMOUSE_SYNAPTICS,
		.name		= "SynPS/2",
		.alias		= "synaptics",
		.detect		= synaptics_detect,
		.init		= synaptics_init,
	},
	{
		.type		= PSMOUSE_ALPS,
		.name		= "AlpsPS/2",
		.alias		= "alps",
		.detect		= alps_detect,
		.init		= alps_init,
	},
	{
		.type		= PSMOUSE_LIFEBOOK,
		.name		= "LBPS/2",
		.alias		= "lifebook",
		.init		= lifebook_init,
	},
	{
		.type		= PSMOUSE_AUTO,
		.name		= "auto",
		.alias		= "any",
		.maxproto	= 1,
	},
};

static struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
		if (psmouse_protocols[i].type == type)
			return &psmouse_protocols[i];

	WARN_ON(1);
	return &psmouse_protocols[0];
}

static struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
{
	struct psmouse_protocol *p;
	int i;

	for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
		p = &psmouse_protocols[i];

		if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
		    (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
			return &psmouse_protocols[i];
	}

	return NULL;
}


/*
 * psmouse_probe() probes for a PS/2 mouse.
 */

static int psmouse_probe(struct psmouse *psmouse)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char param[2];

/*
 * First, we check if it's a mouse. It should send 0x00 or 0x03
 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
 * ID queries, probably due to a firmware bug.
 */

	param[0] = 0xa5;
	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
		return -1;

	if (param[0] != 0x00 && param[0] != 0x03 &&
	    param[0] != 0x04 && param[0] != 0xff)
		return -1;

/*
 * Then we reset and disable the mouse so that it doesn't generate events.
 */

	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
		printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);

	return 0;
}

/*
 * Here we set the mouse resolution.
 */

void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
{
	unsigned char params[] = { 0, 1, 2, 2, 3 };

	if (resolution == 0 || resolution > 200)
		resolution = 200;

	ps2_command(&psmouse->ps2dev, &params[resolution / 50], PSMOUSE_CMD_SETRES);
	psmouse->resolution = 25 << params[resolution / 50];
}

/*
 * Here we set the mouse report rate.
 */

static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
{
	unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
	int i = 0;

	while (rates[i] > rate) i++;
	ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE);
	psmouse->rate = rates[i];
}

/*
 * psmouse_initialize() initializes the mouse to a sane state.
 */

static void psmouse_initialize(struct psmouse *psmouse)
{
/*
 * We set the mouse into streaming mode.
 */

	ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM);

/*
 * We set the mouse report rate, resolution and scaling.
 */

	if (psmouse_max_proto != PSMOUSE_PS2) {
		psmouse->set_rate(psmouse, psmouse->rate);
		psmouse->set_resolution(psmouse, psmouse->resolution);
		ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
	}
}

/*
 * psmouse_set_state() sets new psmouse state and resets all flags and
 * counters while holding serio lock so fighting with interrupt handler
 * is not a concern.
 */

static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
{
	serio_pause_rx(psmouse->ps2dev.serio);
	psmouse->state = new_state;
	psmouse->pktcnt = psmouse->out_of_sync = 0;
	psmouse->ps2dev.flags = 0;
	serio_continue_rx(psmouse->ps2dev.serio);
}

/*
 * psmouse_activate() enables the mouse so that we get motion reports from it.
 */

static void psmouse_activate(struct psmouse *psmouse)
{
	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
		printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
			psmouse->ps2dev.serio->phys);

	psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
}


/*
 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
 * reports from it unless we explicitely request it.
 */

static void psmouse_deactivate(struct psmouse *psmouse)
{
	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
		printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
			psmouse->ps2dev.serio->phys);

	psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
}


/*
 * psmouse_cleanup() resets the mouse into power-on state.
 */

static void psmouse_cleanup(struct serio *serio)
{
	struct psmouse *psmouse = serio_get_drvdata(serio);

	psmouse_reset(psmouse);
}

/*
 * psmouse_disconnect() closes and frees.
 */

static void psmouse_disconnect(struct serio *serio)
{
	struct psmouse *psmouse, *parent = NULL;

	psmouse = serio_get_drvdata(serio);

	device_remove_file(&serio->dev, &psmouse_attr_protocol);
	device_remove_file(&serio->dev, &psmouse_attr_rate);
	device_remove_file(&serio->dev, &psmouse_attr_resolution);
	device_remove_file(&serio->dev, &psmouse_attr_resetafter);

	down(&psmouse_sem);

	psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);

	if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
		parent = serio_get_drvdata(serio->parent);
		psmouse_deactivate(parent);
	}

	if (psmouse->disconnect)
		psmouse->disconnect(psmouse);

	if (parent && parent->pt_deactivate)
		parent->pt_deactivate(parent);

	psmouse_set_state(psmouse, PSMOUSE_IGNORE);

	input_unregister_device(&psmouse->dev);
	serio_close(serio);
	serio_set_drvdata(serio, NULL);
	kfree(psmouse);

	if (parent)
		psmouse_activate(parent);

	up(&psmouse_sem);
}

static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_protocol *proto)
{
	memset(&psmouse->dev, 0, sizeof(struct input_dev));

	init_input_dev(&psmouse->dev);

	psmouse->dev.private = psmouse;
	psmouse->dev.dev = &psmouse->ps2dev.serio->dev;

	psmouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
	psmouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
	psmouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);

	psmouse->set_rate = psmouse_set_rate;
	psmouse->set_resolution = psmouse_set_resolution;
	psmouse->protocol_handler = psmouse_process_byte;
	psmouse->pktsize = 3;