psmouse-base.c

qq2440板子上

/*
 * PS/2 mouse driver
 *
 * Copyright (c) 1999-2002 Vojtech Pavlik
 * Copyright (c) 2003-2004 Dmitry Torokhov
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/init.h>
#include <linux/libps2.h>
#include "psmouse.h"
#include "synaptics.h"
#include "logips2pp.h"
#include "alps.h"
#include "lifebook.h"

#define DRIVER_DESC	"PS/2 mouse driver"

MODULE_AUTHOR("Vojtech Pavlik <[e-mail]>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
#define param_check_proto_abbrev(name, p)	__param_check(name, p, unsigned int)
#define param_set_proto_abbrev			psmouse_set_maxproto
#define param_get_proto_abbrev			psmouse_get_maxproto
module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");

static unsigned int psmouse_resolution = 200;
module_param_named(resolution, psmouse_resolution, uint, 0644);
MODULE_PARM_DESC(resolution, "Resolution, in dpi.");

static unsigned int psmouse_rate = 100;
module_param_named(rate, psmouse_rate, uint, 0644);
MODULE_PARM_DESC(rate, "Report rate, in reports per second.");

static unsigned int psmouse_smartscroll = 1;
module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");

static unsigned int psmouse_resetafter;
module_param_named(resetafter, psmouse_resetafter, uint, 0644);
MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");

PSMOUSE_DEFINE_ATTR(protocol);
PSMOUSE_DEFINE_ATTR(rate);
PSMOUSE_DEFINE_ATTR(resolution);
PSMOUSE_DEFINE_ATTR(resetafter);

__obsolete_setup("psmouse_noext");
__obsolete_setup("psmouse_resolution=");
__obsolete_setup("psmouse_smartscroll=");
__obsolete_setup("psmouse_resetafter=");
__obsolete_setup("psmouse_rate=");

/*
 * psmouse_sem protects all operations changing state of mouse
 * (connecting, disconnecting, changing rate or resolution via
 * sysfs). We could use a per-device semaphore but since there
 * rarely more than one PS/2 mouse connected and since semaphore
 * is taken in "slow" paths it is not worth it.
 */
static DECLARE_MUTEX(psmouse_sem);

struct psmouse_protocol {
	enum psmouse_type type;
	char *name;
	char *alias;
	int maxproto;
	int (*detect)(struct psmouse *, int);
	int (*init)(struct psmouse *);
};

/*
 * psmouse_process_byte() analyzes the PS/2 data stream and reports
 * relevant events to the input module once full packet has arrived.
 */

static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
{
	struct input_dev *dev = &psmouse->dev;
	unsigned char *packet = psmouse->packet;

	if (psmouse->pktcnt < psmouse->pktsize)
		return PSMOUSE_GOOD_DATA;

/*
 * Full packet accumulated, process it
 */

	input_regs(dev, regs);

/*
 * Scroll wheel on IntelliMice, scroll buttons on NetMice
 */

	if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
		input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);

/*
 * Scroll wheel and buttons on IntelliMouse Explorer
 */

	if (psmouse->type == PSMOUSE_IMEX) {
		input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
		input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
		input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
	}

/*
 * Extra buttons on Genius NewNet 3D
 */

	if (psmouse->type == PSMOUSE_GENPS) {
		input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
		input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
	}

/*
 * Extra button on ThinkingMouse
 */
	if (psmouse->type == PSMOUSE_THINKPS) {
		input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
		/* Without this bit of weirdness moving up gives wildly high Y changes. */
		packet[1] |= (packet[0] & 0x40) << 1;
	}

/*
 * Generic PS/2 Mouse
 */

	input_report_key(dev, BTN_LEFT,    packet[0]       & 1);
	input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
	input_report_key(dev, BTN_RIGHT,  (packet[0] >> 1) & 1);

	input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
	input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);

	input_sync(dev);

	return PSMOUSE_FULL_PACKET;
}

/*
 * psmouse_interrupt() handles incoming characters, either gathering them into
 * packets or passing them to the command routine as command output.
 */

static irqreturn_t psmouse_interrupt(struct serio *serio,
		unsigned char data, unsigned int flags, struct pt_regs *regs)
{
	struct psmouse *psmouse = serio_get_drvdata(serio);
	psmouse_ret_t rc;

	if (psmouse->state == PSMOUSE_IGNORE)
		goto out;

	if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
		if (psmouse->state == PSMOUSE_ACTIVATED)
			printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
				flags & SERIO_TIMEOUT ? " timeout" : "",
				flags & SERIO_PARITY ? " bad parity" : "");
		ps2_cmd_aborted(&psmouse->ps2dev);
		goto out;
	}

	if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
		if  (ps2_handle_ack(&psmouse->ps2dev, data))
			goto out;

	if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
		if  (ps2_handle_response(&psmouse->ps2dev, data))
			goto out;

	if (psmouse->state == PSMOUSE_INITIALIZING)
		goto out;

	if (psmouse->state == PSMOUSE_ACTIVATED &&
	    psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
		printk(KERN_WARNING "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
		       psmouse->name, psmouse->phys, psmouse->pktcnt);
		psmouse->pktcnt = 0;
	}

	psmouse->last = jiffies;
	psmouse->packet[psmouse->pktcnt++] = data;

	if (psmouse->packet[0] == PSMOUSE_RET_BAT) {
		if (psmouse->pktcnt == 1)
			goto out;

		if (psmouse->pktcnt == 2) {
			if (psmouse->packet[1] == PSMOUSE_RET_ID) {
				psmouse->state = PSMOUSE_IGNORE;
				serio_reconnect(serio);
				goto out;
			}
			if (psmouse->type == PSMOUSE_SYNAPTICS) {
				/* neither 0xAA nor 0x00 are valid first bytes
				 * for a packet in absolute mode
				 */
				psmouse->pktcnt = 0;
				goto out;
			}
		}
	}

	rc = psmouse->protocol_handler(psmouse, regs);

	switch (rc) {
		case PSMOUSE_BAD_DATA:
			printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
				psmouse->name, psmouse->phys, psmouse->pktcnt);
			psmouse->pktcnt = 0;

			if (++psmouse->out_of_sync == psmouse->resetafter) {
				psmouse->state = PSMOUSE_IGNORE;
				printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
				serio_reconnect(psmouse->ps2dev.serio);
			}
			break;

		case PSMOUSE_FULL_PACKET:
			psmouse->pktcnt = 0;
			if (psmouse->out_of_sync) {
				psmouse->out_of_sync = 0;
				printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
					psmouse->name, psmouse->phys);
			}
			break;

		case PSMOUSE_GOOD_DATA:
			break;
	}
out:
	return IRQ_HANDLED;
}


/*
 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
 * using sliced syntax, understood by advanced devices, such as Logitech
 * or Synaptics touchpads. The command is encoded as:
 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
 * is the command.
 */
int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
{
	int i;

	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
		return -1;

	for (i = 6; i >= 0; i -= 2) {
		unsigned char d = (command >> i) & 3;
		if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
			return -1;
	}

	return 0;
}


/*
 * psmouse_reset() resets the mouse into power-on state.
 */
int psmouse_reset(struct psmouse *psmouse)
{
	unsigned char param[2];

	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
		return -1;

	if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
		return -1;

	return 0;
}


/*
 * Genius NetMouse magic init.
 */
static int genius_detect(struct psmouse *psmouse, int set_properties)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char param[4];

	param[0] = 3;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
	ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
	ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
	ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
	ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);

	if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
		return -1;

	if (set_properties) {
		set_bit(BTN_EXTRA, psmouse->dev.keybit);
		set_bit(BTN_SIDE, psmouse->dev.keybit);
		set_bit(REL_WHEEL, psmouse->dev.relbit);

		psmouse->vendor = "Genius";
		psmouse->name = "Wheel Mouse";
		psmouse->pktsize = 4;
	}

	return 0;
}

/*
 * IntelliMouse magic init.
 */
static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char param[2];

	param[0] = 200;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
	param[0] = 100;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
	param[0] =  80;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
	ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);

	if (param[0] != 3)
		return -1;

	if (set_properties) {
		set_bit(BTN_MIDDLE, psmouse->dev.keybit);
		set_bit(REL_WHEEL, psmouse->dev.relbit);

		if (!psmouse->vendor) psmouse->vendor = "Generic";
		if (!psmouse->name) psmouse->name = "Wheel Mouse";
		psmouse->pktsize = 4;
	}

	return 0;
}

/*
 * Try IntelliMouse/Explorer magic init.
 */
static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char param[2];

	intellimouse_detect(psmouse, 0);

	param[0] = 200;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
	param[0] = 200;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
	param[0] =  80;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
	ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);

	if (param[0] != 4)
		return -1;

	if (set_properties) {
		set_bit(BTN_MIDDLE, psmouse->dev.keybit);
		set_bit(REL_WHEEL, psmouse->dev.relbit);
		set_bit(BTN_SIDE, psmouse->dev.keybit);
		set_bit(BTN_EXTRA, psmouse->dev.keybit);

		if (!psmouse->vendor) psmouse->vendor = "Generic";
		if (!psmouse->name) psmouse->name = "Explorer Mouse";
		psmouse->pktsize = 4;
	}

	return 0;
}

/*
 * Kensington ThinkingMouse / ExpertMouse magic init.
 */
static int thinking_detect(struct psmouse *psmouse, int set_properties)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char param[2];
	unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 };
	int i;

	param[0] = 10;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
	param[0] = 0;
	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
	for (i = 0; seq[i]; i++)
		ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE);
	ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);

	if (param[0] != 2)
		return -1;

	if (set_properties) {
		set_bit(BTN_EXTRA, psmouse->dev.keybit);

		psmouse->vendor = "Kensington";
		psmouse->name = "ThinkingMouse";
	}