/*
* ALPS touchpad PS/2 mouse driver
*
* 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/slab.h>
#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_OLDPROTO 0x01 /* old style input */
#define ALPS_DUALPOINT 0x02 /* touchpad has trackstick */
#define ALPS_PASS 0x04 /* device has a pass-through port */
#define ALPS_WHEEL 0x08 /* hardware wheel present */
#define ALPS_FW_BK_1 0x10 /* front & back buttons present */
#define ALPS_FW_BK_2 0x20 /* front & back buttons present */
#define ALPS_FOUR_BUTTONS 0x40 /* 4 direction button present */
#define ALPS_PS2_INTERLEAVED 0x80 /* 3-byte PS/2 packet interleaved with
6-byte ALPS packet */
static const struct alps_model_info alps_model_data[] = {
{ { 0x32, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
{ { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO }, /* UMAX-530T */
{ { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
{ { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
{ { 0x60, 0x03, 0xc8 }, 0xf8, 0xf8, 0 }, /* HP ze1115 */
{ { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
{ { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
{ { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Fujitsu Siemens S6010 */
{ { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */
{ { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK_1 }, /* NEC Versa L320 */
{ { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
{ { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D800 */
{ { 0x73, 0x00, 0x0a }, 0xf8, 0xf8, ALPS_DUALPOINT }, /* ThinkPad R61 8918-5QG */
{ { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
{ { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Ahtec Laptop */
{ { 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 */
/* Dell Latitude E5500, E6400, E6500, Precision M4400 */
{ { 0x62, 0x02, 0x14 }, 0xcf, 0xcf,
ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
{ { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FOUR_BUTTONS }, /* Dell Vostro 1400 */
{ { 0x52, 0x01, 0x14 }, 0xff, 0xff,
ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED }, /* Toshiba Tecra A11-11L */
};
/*
* 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.
*/
/*
* PS/2 packet format
*
* byte 0: 0 0 YSGN XSGN 1 M R L
* byte 1: X7 X6 X5 X4 X3 X2 X1 X0
* byte 2: Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
*
* Note that the device never signals overflow condition.
*
* ALPS absolute 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
*
* Dualpoint device -- interleaved packet format
*
* byte 0: 1 1 0 0 1 1 1 1
* byte 1: 0 x6 x5 x4 x3 x2 x1 x0
* byte 2: 0 x10 x9 x8 x7 0 fin ges
* byte 3: 0 0 YSGN XSGN 1 1 1 1
* byte 4: X7 X6 X5 X4 X3 X2 X1 X0
* byte 5: Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
* byte 6: 0 y9 y8 y7 1 m r l
* byte 7: 0 y6 y5 y4 y3 y2 y1 y0
* byte 8: 0 z6 z5 z4 z3 z2 z1 z0
*
* CAPITALS = stick, miniscules = touchpad
*
* ?'s can have different meanings on different models,
* such as wheel rotation, extra buttons, stick buttons
* on a dualpoint, etc.
*/
static bool alps_is_valid_first_byte(const struct alps_model_info *model,
unsigned char data)
{
return (data & model->mask0) == model->byte0;
}
static void alps_report_buttons(struct psmouse *psmouse,
struct input_dev *dev1, struct input_dev *dev2,
int left, int right, int middle)
{
struct input_dev *dev;
/*
* If shared button has already been reported on the
* other device (dev2) then this event should be also
* sent through that device.
*/
dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
input_report_key(dev, BTN_LEFT, left);
dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
input_report_key(dev, BTN_RIGHT, right);
dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
input_report_key(dev, BTN_MIDDLE, middle);
/*
* Sync the _other_ device now, we'll do the first
* device later once we report the rest of the events.
*/
input_sync(dev2);
}
static void alps_process_packet(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
const struct alps_model_info *model = priv->i;
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;
int back = 0, forward = 0;
if (model->flags & ALPS_OLDPROTO) {
left = packet[2] & 0x10;
right = packet[2] & 0x08;
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];
}
if (model->flags & ALPS_FW_BK_1) {
back = packet[0] & 0x10;
forward = packet[2] & 4;
}
if (model->flags & ALPS_FW_BK_2) {
back = packet[3] & 4;
forward = packet[2] & 4;
if ((middle = forward && back))
forward = back = 0;
}
ges = packet[2] & 1;
fin = packet[2] & 2;
if ((model->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));
alps_report_buttons(psmouse, dev2, dev, left, right, middle);
input_sync(dev2);
return;
}
alps_report_buttons(psmouse, dev, dev2, left, right, middle);
/* 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 (model->flags & ALPS_WHEEL)
input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
input_report_key(dev, BTN_FORWARD, forward);
input_report_key(dev, BTN_BACK, back);
}
if (model->flags & ALPS_FOUR_BUTTONS) {
input_report_key(dev, BTN_0, packet[2] & 4);
input_report_key(dev, BTN_1, packet[0] & 0x10);
input_report_key(dev, BTN_2, packet[3] & 4);
input_report_key(dev, BTN_3, packet[0] & 0x20);
}
input_sync(dev);
}
static void alps_report_bare_ps2_packet(struct psmouse *psmous