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linux/drivers/input/mouse/alps.c
Dmitry Torokhov e41fb09b2f [PATCH] ALPS: fix enabling hardware tapping 
It looks like logic for enabling hardware tapping in ALPS driver was
inverted and we enable it only if it was already enabled by BIOS or
firmware.

I have a confirmation from one user that the patch below fixes the problem
for him and it might be beneficial if we could get it into 2.6.12.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-16 09:02:59 -07:00

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/*
* ALPS touchpad PS/2 mouse driver
*
* Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
* Copyright (c) 2003 Peter Osterlund <petero2@telia.com>
* Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
* Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
*
* ALPS detection, tap switching and status querying info is taken from
* tpconfig utility (by C. Scott Ananian and Bruce Kall).
*
* 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/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include "psmouse.h"
#include "alps.h"
#undef DEBUG
#ifdef DEBUG
#define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
#else
#define dbg(format, arg...) do {} while (0)
#endif
#define ALPS_DUALPOINT 0x01
#define ALPS_WHEEL 0x02
#define ALPS_FW_BK 0x04
#define ALPS_4BTN 0x08
#define ALPS_OLDPROTO 0x10
#define ALPS_PASS 0x20
static struct alps_model_info alps_model_data[] = {
{ { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO }, /* UMAX-530T */
{ { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
{ { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
{ { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
{ { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
{ { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, 0 },
{ { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */
{ { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK }, /* NEC Versa L320 */
{ { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
{ { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS }, /* Dell Latitude D800 */
{ { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
{ { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
{ { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
{ { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
{ { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
};
/*
* XXX - this entry is suspicious. First byte has zero lower nibble,
* which is what a normal mouse would report. Also, the value 0x0e
* isn't valid per PS/2 spec.
*/
/*
* ALPS abolute Mode - new format
*
* byte 0: 1 ? ? ? 1 ? ? ?
* byte 1: 0 x6 x5 x4 x3 x2 x1 x0
* byte 2: 0 x10 x9 x8 x7 ? fin ges
* byte 3: 0 y9 y8 y7 1 M R L
* byte 4: 0 y6 y5 y4 y3 y2 y1 y0
* byte 5: 0 z6 z5 z4 z3 z2 z1 z0
*
* ?'s can have different meanings on different models,
* such as wheel rotation, extra buttons, stick buttons
* on a dualpoint, etc.
*/
static void alps_process_packet(struct psmouse *psmouse, struct pt_regs *regs)
{
struct alps_data *priv = psmouse->private;
unsigned char *packet = psmouse->packet;
struct input_dev *dev = &psmouse->dev;
struct input_dev *dev2 = &priv->dev2;
int x, y, z, ges, fin, left, right, middle;
input_regs(dev, regs);
if ((packet[0] & 0xc8) == 0x08) { /* 3-byte PS/2 packet */
input_report_key(dev2, BTN_LEFT, packet[0] & 1);
input_report_key(dev2, BTN_RIGHT, packet[0] & 2);
input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
input_report_rel(dev2, REL_X,
packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
input_report_rel(dev2, REL_Y,
packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
input_sync(dev2);
return;
}
if (priv->i->flags & ALPS_OLDPROTO) {
left = packet[2] & 0x08;
right = packet[2] & 0x10;
middle = 0;
x = packet[1] | ((packet[0] & 0x07) << 7);
y = packet[4] | ((packet[3] & 0x07) << 7);
z = packet[5];
} else {
left = packet[3] & 1;
right = packet[3] & 2;
middle = packet[3] & 4;
x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
z = packet[5];
}
ges = packet[2] & 1;
fin = packet[2] & 2;
input_report_key(dev, BTN_LEFT, left);
input_report_key(dev, BTN_RIGHT, right);
input_report_key(dev, BTN_MIDDLE, middle);
if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x));
input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
input_sync(dev);
input_sync(dev2);
return;
}
/* Convert hardware tap to a reasonable Z value */
if (ges && !fin) z = 40;
/*
* A "tap and drag" operation is reported by the hardware as a transition
* from (!fin && ges) to (fin && ges). This should be translated to the
* sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
*/
if (ges && fin && !priv->prev_fin) {
input_report_abs(dev, ABS_X, x);
input_report_abs(dev, ABS_Y, y);
input_report_abs(dev, ABS_PRESSURE, 0);
input_report_key(dev, BTN_TOOL_FINGER, 0);
input_sync(dev);
}
priv->prev_fin = fin;
if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
if (z < 25) input_report_key(dev, BTN_TOUCH, 0);
if (z > 0) {
input_report_abs(dev, ABS_X, x);
input_report_abs(dev, ABS_Y, y);
}
input_report_abs(dev, ABS_PRESSURE, z);
input_report_key(dev, BTN_TOOL_FINGER, z > 0);
if (priv->i->flags & ALPS_WHEEL)
input_report_rel(dev, REL_WHEEL, ((packet[0] >> 4) & 0x07) | ((packet[2] >> 2) & 0x08));
if (priv->i->flags & ALPS_FW_BK) {
input_report_key(dev, BTN_FORWARD, packet[0] & 0x10);
input_report_key(dev, BTN_BACK, packet[2] & 0x04);
}
input_sync(dev);
}
static psmouse_ret_t alps_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
{
struct alps_data *priv = psmouse->private;
if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
if (psmouse->pktcnt == 3) {
alps_process_packet(psmouse, regs);
return PSMOUSE_FULL_PACKET;
}
return PSMOUSE_GOOD_DATA;
}
if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
return PSMOUSE_BAD_DATA;
/* Bytes 2 - 6 should have 0 in the highest bit */
if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
(psmouse->packet[psmouse->pktcnt - 1] & 0x80))
return PSMOUSE_BAD_DATA;
if (psmouse->pktcnt == 6) {
alps_process_packet(psmouse, regs);
return PSMOUSE_FULL_PACKET;
}
return PSMOUSE_GOOD_DATA;
}
static struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
unsigned char param[4];
int i;
/*
* First try "E6 report".
* ALPS should return 0,0,10 or 0,0,100
*/
param[0] = 0;
if (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))
return NULL;
param[0] = param[1] = param[2] = 0xff;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
return NULL;
dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
return NULL;
/*
* Now try "E7 report". Allowed responses are in
* alps_model_data[].signature
*/
param[0] = 0;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21))
return NULL;
param[0] = param[1] = param[2] = 0xff;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
return NULL;
dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++);
*version = (param[0] << 8) | (param[1] << 4) | i;
for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
if (!memcmp(param, alps_model_data[i].signature, sizeof(alps_model_data[i].signature)))
return alps_model_data + i;
return NULL;
}
/*
* For DualPoint devices select the device that should respond to
* subsequent commands. It looks like glidepad is behind stickpointer,
* I'd thought it would be other way around...
*/
static int alps_passthrough_mode(struct psmouse *psmouse, int enable)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[3];
int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
if (ps2_command(ps2dev, NULL, cmd) ||
ps2_command(ps2dev, NULL, cmd) ||
ps2_command(ps2dev, NULL, cmd) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
return -1;
/* we may get 3 more bytes, just ignore them */
ps2_command(ps2dev, param, 0x0300);
return 0;
}
static int alps_absolute_mode(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
/* Try ALPS magic knock - 4 disable before enable */
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
return -1;
/*
* Switch mouse to poll (remote) mode so motion data will not
* get in our way
*/
return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
}
static int alps_get_status(struct psmouse *psmouse, char *param)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
/* Get status: 0xF5 0xF5 0xF5 0xE9 */
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
return -1;
dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
return 0;
}
/*
* Turn touchpad tapping on or off. The sequences are:
* 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
* 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
* My guess that 0xE9 (GetInfo) is here as a sync point.
* For models that also have stickpointer (DualPoints) its tapping
* is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
* we don't fiddle with it.
*/
static int alps_tap_mode(struct psmouse *psmouse, int enable)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
unsigned char tap_arg = enable ? 0x0A : 0x00;
unsigned char param[4];
if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, &tap_arg, cmd))
return -1;
if (alps_get_status(psmouse, param))
return -1;
return 0;
}
static int alps_reconnect(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
unsigned char param[4];
int version;
psmouse_reset(psmouse);
if (!(priv->i = alps_get_model(psmouse, &version)))
return -1;
if (priv->i->flags & ALPS_PASS && alps_passthrough_mode(psmouse, 1))
return -1;
if (alps_get_status(psmouse, param))
return -1;
if (!(param[0] & 0x04))
alps_tap_mode(psmouse, 1);
if (alps_absolute_mode(psmouse)) {
printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
return -1;
}
if (priv->i->flags == ALPS_PASS && alps_passthrough_mode(psmouse, 0))
return -1;
return 0;
}
static void alps_disconnect(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
psmouse_reset(psmouse);
input_unregister_device(&priv->dev2);
kfree(priv);
}
int alps_init(struct psmouse *psmouse)
{
struct alps_data *priv;
unsigned char param[4];
int version;
psmouse->private = priv = kmalloc(sizeof(struct alps_data), GFP_KERNEL);
if (!priv)
goto init_fail;
memset(priv, 0, sizeof(struct alps_data));
if (!(priv->i = alps_get_model(psmouse, &version)))
goto init_fail;
if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
goto init_fail;
if (alps_get_status(psmouse, param)) {
printk(KERN_ERR "alps.c: touchpad status report request failed\n");
goto init_fail;
}
if (param[0] & 0x04) {
printk(KERN_INFO "alps.c: Enabling hardware tapping\n");
if (alps_tap_mode(psmouse, 1))
printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
}
if (alps_absolute_mode(psmouse)) {
printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
goto init_fail;
}
if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
goto init_fail;
psmouse->dev.evbit[LONG(EV_KEY)] |= BIT(EV_KEY);
psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
psmouse->dev.keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);
psmouse->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0);
input_set_abs_params(&psmouse->dev, ABS_Y, 0, 767, 0, 0);
input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0);
if (priv->i->flags & ALPS_WHEEL) {
psmouse->dev.evbit[LONG(EV_REL)] |= BIT(EV_REL);
psmouse->dev.relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL);
}
if (priv->i->flags & ALPS_FW_BK) {
psmouse->dev.keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD);
psmouse->dev.keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK);
}
sprintf(priv->phys, "%s/input1", psmouse->ps2dev.serio->phys);
priv->dev2.phys = priv->phys;
priv->dev2.name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
priv->dev2.id.bustype = BUS_I8042;
priv->dev2.id.vendor = 0x0002;
priv->dev2.id.product = PSMOUSE_ALPS;
priv->dev2.id.version = 0x0000;
priv->dev2.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
priv->dev2.relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y);
priv->dev2.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
input_register_device(&priv->dev2);
printk(KERN_INFO "input: %s on %s\n", priv->dev2.name, psmouse->ps2dev.serio->phys);
psmouse->protocol_handler = alps_process_byte;
psmouse->disconnect = alps_disconnect;
psmouse->reconnect = alps_reconnect;
psmouse->pktsize = 6;
return 0;
init_fail:
kfree(priv);
return -1;
}
int alps_detect(struct psmouse *psmouse, int set_properties)
{
int version;
struct alps_model_info *model;
if (!(model = alps_get_model(psmouse, &version)))
return -1;
if (set_properties) {
psmouse->vendor = "ALPS";
if (model->flags & ALPS_DUALPOINT)
psmouse->name = "DualPoint TouchPad";
else
psmouse->name = "GlidePoint";
psmouse->model = version;
}
return 0;
}
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