WebSVN - shark - Rev 523 - /shark/trunk/drivers/input/mouse/psmouse-base.c

/*
* PS/2 mouse driver
*
* Copyright (c) 1999-2002 Vojtech Pavlik
*/

/*
* 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 <linuxcomp.h>

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/init.h>
#include <linux/pm.h>
#include "psmouse.h"
#include "synaptics.h"
#include "logips2pp.h"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
MODULE_DESCRIPTION("PS/2 mouse driver");
MODULE_PARM(psmouse_noext, "1i");
MODULE_PARM_DESC(psmouse_noext, "Disable any protocol extensions. Useful for KVM switches.");
MODULE_PARM(psmouse_resolution, "i");
MODULE_PARM_DESC(psmouse_resolution, "Resolution, in dpi.");
MODULE_PARM(psmouse_rate, "i");
MODULE_PARM_DESC(psmouse_rate, "Report rate, in reports per second.");
MODULE_PARM(psmouse_smartscroll, "i");
MODULE_PARM_DESC(psmouse_smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
MODULE_PARM(psmouse_resetafter, "i");
MODULE_PARM_DESC(psmouse_resetafter, "Reset Synaptics Touchpad after so many bad packets (0 = never).");
MODULE_LICENSE("GPL");

static int psmouse_noext;
int psmouse_resolution = 200;
unsigned int psmouse_rate = 100;
int psmouse_smartscroll = 1;
unsigned int psmouse_resetafter;

static char *psmouse_protocols[] = { "None", "PS/2", "PS2++", "PS2T++", "GenPS/2", "ImPS/2", "ImExPS/2", "SynPS/2"};

/*
* psmouse_process_packet() analyzes the PS/2 mouse packet contents and
* reports relevant events to the input module.
*/

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

input_regs(dev, regs);

/*
* The PS2++ protocol is a little bit complex
*/

if (psmouse->type == PSMOUSE_PS2PP || psmouse->type == PSMOUSE_PS2TPP)
ps2pp_process_packet(psmouse);

/*
* 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);
}

/*
* 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);
}

/*
* 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->private;

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

if (psmouse->acking) {
switch (data) {
case PSMOUSE_RET_ACK:
psmouse->ack = 1;
break;
case PSMOUSE_RET_NAK:
psmouse->ack = -1;
break;
default:
psmouse->ack = 1; /* Workaround for mice which don't ACK the Get ID command */
if (psmouse->cmdcnt)
psmouse->cmdbuf[--psmouse->cmdcnt] = data;
break;
}
psmouse->acking = 0;
goto out;
}

if (psmouse->cmdcnt) {
psmouse->cmdbuf[--psmouse->cmdcnt] = data;
goto out;
}

if (psmouse->pktcnt && time_after(jiffies26, 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 = jiffies26;
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_rescan(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;
}
}
}

if (psmouse->type == PSMOUSE_SYNAPTICS) {
/*
* The synaptics driver has its own resync logic,
* so it needs to receive all bytes one at a time.
*/
synaptics_process_byte(psmouse, regs);
goto out;
}

if (psmouse->pktcnt == 3 + (psmouse->type >= PSMOUSE_GENPS)) {
psmouse_process_packet(psmouse, regs);
psmouse->pktcnt = 0;
goto out;
}
out:
return IRQ_HANDLED;
}

/*
* psmouse_sendbyte() sends a byte to the mouse, and waits for acknowledge.
* It doesn't handle retransmission, though it could - because when there would
* be need for retransmissions, the mouse has to be replaced anyway.
*/

static int psmouse_sendbyte(struct psmouse *psmouse, unsigned char byte)
{
int timeout = 10000; /* 100 msec */
psmouse->ack = 0;
psmouse->acking = 1;

if (serio_write(psmouse->serio, byte)) {
psmouse->acking = 0;
return -1;
}

while (!psmouse->ack && timeout--) udelay(10);

return -(psmouse->ack <= 0);
}

/*
* psmouse_command() sends a command and its parameters to the mouse,
* then waits for the response and puts it in the param array.
*/

int psmouse_command(struct psmouse *psmouse, unsigned char *param, int command)
{
int timeout = 500000; /* 500 msec */
int send = (command >> 12) & 0xf;
int receive = (command >> 8) & 0xf;
int i;

psmouse->cmdcnt = receive;

if (command == PSMOUSE_CMD_RESET_BAT)
timeout = 4000000; /* 4 sec */

if (command & 0xff)
if (psmouse_sendbyte(psmouse, command & 0xff))
return (psmouse->cmdcnt = 0) - 1;

for (i = 0; i < send; i++)
if (psmouse_sendbyte(psmouse, param[i]))
return (psmouse->cmdcnt = 0) - 1;

while (psmouse->cmdcnt && timeout--) {

if (psmouse->cmdcnt == 1 && command == PSMOUSE_CMD_RESET_BAT)
timeout = 100000;

if (psmouse->cmdcnt == 1 && command == PSMOUSE_CMD_GETID &&
psmouse->cmdbuf[1] != 0xab && psmouse->cmdbuf[1] != 0xac) {
psmouse->cmdcnt = 0;
break;
}

udelay(1);
}

for (i = 0; i < receive; i++)
param[i] = psmouse->cmdbuf[(receive - 1) - i];

if (psmouse->cmdcnt)
return (psmouse->cmdcnt = 0) - 1;

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 char param[4];

param[0] = 0;
psmouse->vendor = "Generic";
psmouse->name = "Mouse";
psmouse->model = 0;

if (psmouse_noext)
return PSMOUSE_PS2;

/*
* Try Synaptics TouchPad magic ID
*/

param[0] = 0;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRES);
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRES);
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRES);
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRES);
psmouse_command(psmouse, param, PSMOUSE_CMD_GETINFO);

if (param[1] == 0x47) {
psmouse->vendor = "Synaptics";
psmouse->name = "TouchPad";
if (!synaptics_init(psmouse))
return PSMOUSE_SYNAPTICS;
else
return PSMOUSE_PS2;
}

/*
* Try Genius NetMouse magic init.
*/

param[0] = 3;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRES);
psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11);
psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11);
psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11);
psmouse_command(psmouse, param, PSMOUSE_CMD_GETINFO);

if (param[0] == 0x00 && param[1] == 0x33 && param[2] == 0x55) {

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";
return PSMOUSE_GENPS;
}

/*
* Try Logitech magic ID.
*/

param[0] = 0;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRES);
psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11);
psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11);
psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11);
param[1] = 0;
psmouse_command(psmouse, param, PSMOUSE_CMD_GETINFO);

if (param[1]) {
int type = ps2pp_detect_model(psmouse, param);
if (type)
return type;
}

/*
* Try IntelliMouse magic init.
*/

param[0] = 200;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE);
param[0] = 100;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE);
psmouse_command(psmouse, param, PSMOUSE_CMD_GETID);

if (param[0] == 3) {

set_bit(REL_WHEEL, psmouse->dev.relbit);

/*
* Try IntelliMouse/Explorer magic init.
*/

param[0] = 200;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE);
param[0] = 200;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE);
psmouse_command(psmouse, param, PSMOUSE_CMD_GETID);

if (param[0] == 4) {

set_bit(BTN_SIDE, psmouse->dev.keybit);
set_bit(BTN_EXTRA, psmouse->dev.keybit);

psmouse->name = "Explorer Mouse";
return PSMOUSE_IMEX;
}

psmouse->name = "Wheel Mouse";
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.
*/

return PSMOUSE_PS2;
}

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

static int psmouse_probe(struct psmouse *psmouse)
{
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.
*/

param[0] = param[1] = 0xa5;

if (psmouse_command(psmouse, param, PSMOUSE_CMD_GETID))
return -1;

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

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

if (psmouse_command(psmouse, NULL, PSMOUSE_CMD_RESET_DIS))
return -1;

/*
* And here we try to determine if it has any extensions over the
* basic PS/2 3-button mouse.
*/

return psmouse->type = psmouse_extensions(psmouse);
}

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

static void psmouse_set_resolution(struct psmouse *psmouse)
{
unsigned char param[1];

if (psmouse->type == PSMOUSE_PS2PP && psmouse_resolution > 400) {
ps2pp_set_800dpi(psmouse);
return;
}

if (!psmouse_resolution || psmouse_resolution >= 200)
param[0] = 3;
else if (psmouse_resolution >= 100)
param[0] = 2;
else if (psmouse_resolution >= 50)
param[0] = 1;
else if (psmouse_resolution)
param[0] = 0;

psmouse_command(psmouse, param, PSMOUSE_CMD_SETRES);
}

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

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

while (rates[i] > psmouse_rate) i++;
psmouse_command(psmouse, rates + i, PSMOUSE_CMD_SETRATE);
}

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

static void psmouse_initialize(struct psmouse *psmouse)
{
unsigned char param[2];

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

if (!psmouse_noext) {
psmouse_set_rate(psmouse);
psmouse_set_resolution(psmouse);
psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11);
}

/*
* We set the mouse into streaming mode.
*/

psmouse_command(psmouse, param, PSMOUSE_CMD_SETSTREAM);
}

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

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

psmouse->state = PSMOUSE_ACTIVATED;
}

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

static void psmouse_cleanup(struct serio *serio)
{
struct psmouse *psmouse = serio->private;
unsigned char param[2];
psmouse_command(psmouse, param, PSMOUSE_CMD_RESET_BAT);
}

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

static void psmouse_disconnect(struct serio *serio)
{
struct psmouse *psmouse = serio->private;

/* Added by Nino - Clean de mouse before closing */
psmouse_cleanup(serio);

psmouse->state = PSMOUSE_IGNORE;
synaptics_disconnect(psmouse);
input_unregister_device(&psmouse->dev);
serio_close(serio);
kfree(psmouse);
}

/*
* Reinitialize mouse hardware after software suspend.
*/

static int psmouse_pm_callback(struct pm_dev *dev, pm_request_t request, void *data)
{
struct psmouse *psmouse = dev->data;
struct serio_dev *ser_dev = psmouse->serio->dev;

synaptics_disconnect(psmouse);

/* We need to reopen the serio port to reinitialize the i8042 controller */
serio_close(psmouse->serio);
serio_open(psmouse->serio, ser_dev);

/* Probe and re-initialize the mouse */
psmouse_probe(psmouse);
psmouse_initialize(psmouse);
synaptics_pt_init(psmouse);
psmouse_activate(psmouse);

return 0;
}

/*
* psmouse_connect() is a callback from the serio module when
* an unhandled serio port is found.
*/

static void psmouse_connect(struct serio *serio, struct serio_dev *dev)
{
struct psmouse *psmouse;
struct pm_dev *pmdev;

if ((serio->type & SERIO_TYPE) != SERIO_8042 &&
(serio->type & SERIO_TYPE) != SERIO_PS_PSTHRU)
return;

if (!(psmouse = kmalloc(sizeof(struct psmouse), GFP_KERNEL)))
return;

memset(psmouse, 0, sizeof(struct psmouse));

init_input_dev(&psmouse->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->state = PSMOUSE_NEW_DEVICE;
psmouse->serio = serio;
psmouse->dev.private = psmouse;

serio->private = psmouse;

if (serio_open(serio, dev)) {
kfree(psmouse);
return;
}

if (psmouse_probe(psmouse) <= 0) {
serio_close(serio);
kfree(psmouse);
return;
}

pmdev = pm_register(PM_SYS_DEV, PM_SYS_UNKNOWN, psmouse_pm_callback);
if (pmdev) {
psmouse->dev.pm_dev = pmdev;
pmdev->data = psmouse;
}

sprintf26(psmouse->devname, "%s %s %s",
psmouse_protocols[psmouse->type], psmouse->vendor, psmouse->name);
sprintf26(psmouse->phys, "%s/input0",
serio->phys);

psmouse->dev.name = psmouse->devname;
psmouse->dev.phys = psmouse->phys;
psmouse->dev.id.bustype = BUS_I8042;
psmouse->dev.id.vendor = 0x0002;
psmouse->dev.id.product = psmouse->type;
psmouse->dev.id.version = psmouse->model;

input_register_device(&psmouse->dev);

printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys);

psmouse_initialize(psmouse);

synaptics_pt_init(psmouse);

psmouse_activate(psmouse);
}

static struct serio_dev psmouse_dev = {
.interrupt = psmouse_interrupt,
.connect = psmouse_connect,
.disconnect = psmouse_disconnect,
.cleanup = psmouse_cleanup,
};

#ifndef MODULE
static int __init psmouse_noext_setup(char *str)
{
psmouse_noext = 1;
return 1;
}

static int __init psmouse_resolution_setup(char *str)
{
get_option(&str, &psmouse_resolution);
return 1;
}

static int __init psmouse_smartscroll_setup(char *str)
{
get_option(&str, &psmouse_smartscroll);
return 1;
}

static int __init psmouse_resetafter_setup(char *str)
{
get_option(&str, &psmouse_resetafter);
return 1;
}

static int __init psmouse_rate_setup(char *str)
{
get_option(&str, &psmouse_rate);
return 1;
}

__setup("psmouse_noext", psmouse_noext_setup);
__setup("psmouse_resolution=", psmouse_resolution_setup);
__setup("psmouse_smartscroll=", psmouse_smartscroll_setup);
__setup("psmouse_resetafter=", psmouse_resetafter_setup);
__setup("psmouse_rate=", psmouse_rate_setup);

#endif

int __init psmouse_init(void)
{
serio_register_device(&psmouse_dev);
return 0;
}

void __exit psmouse_exit(void)
{
serio_unregister_device(&psmouse_dev);
}

module_init(psmouse_init);
module_exit(psmouse_exit);

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(root)/shark/trunk/drivers/input/mouse/psmouse-base.c @ 1547 - Rev 523