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linux/drivers/input/mouse/alps.c
Pali Rohár a7ef82aee9 Input: alps - ignore bad data on Dell Latitudes E6440 and E7440 
Sometimes on Dell Latitude laptops psmouse/alps driver receive invalid ALPS
protocol V3 packets with bit7 set in last byte. More often it can be
reproduced on Dell Latitude E6440 or E7440 with closed lid and pushing
cover above touchpad.

If bit7 in last packet byte is set then it is not valid ALPS packet. I was
told that ALPS devices never send these packets. It is not know yet who
send those packets, it could be Dell EC, bug in BIOS and also bug in
touchpad firmware...

With this patch alps driver does not process those invalid packets, but
instead of reporting PSMOUSE_BAD_DATA, getting into out of sync state,
getting back in sync with the next byte and spam dmesg we return
PSMOUSE_FULL_PACKET. If driver is truly out of sync we'll fail the checks
on the next byte and report PSMOUSE_BAD_DATA then.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-11-13 17:42:57 -08:00

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/*
* ALPS touchpad PS/2 mouse driver
*
* Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
* Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
* Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
* Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net>
*
* 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/input/mt.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include "psmouse.h"
#include "alps.h"
/*
* Definitions for ALPS version 3 and 4 command mode protocol
*/
#define ALPS_CMD_NIBBLE_10 0x01f2
#define ALPS_REG_BASE_RUSHMORE 0xc2c0
#define ALPS_REG_BASE_PINNACLE 0x0000
static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
{ PSMOUSE_CMD_SETPOLL, 0x00 }, /* 0 */
{ PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */
{ PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */
{ PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */
{ PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */
{ PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */
{ PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */
{ PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */
{ PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */
{ PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */
{ ALPS_CMD_NIBBLE_10, 0x00 }, /* a */
{ PSMOUSE_CMD_SETRES, 0x00 }, /* b */
{ PSMOUSE_CMD_SETRES, 0x01 }, /* c */
{ PSMOUSE_CMD_SETRES, 0x02 }, /* d */
{ PSMOUSE_CMD_SETRES, 0x03 }, /* e */
{ PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */
};
static const struct alps_nibble_commands alps_v4_nibble_commands[] = {
{ PSMOUSE_CMD_ENABLE, 0x00 }, /* 0 */
{ PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */
{ PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */
{ PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */
{ PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */
{ PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */
{ PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */
{ PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */
{ PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */
{ PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */
{ ALPS_CMD_NIBBLE_10, 0x00 }, /* a */
{ PSMOUSE_CMD_SETRES, 0x00 }, /* b */
{ PSMOUSE_CMD_SETRES, 0x01 }, /* c */
{ PSMOUSE_CMD_SETRES, 0x02 }, /* d */
{ PSMOUSE_CMD_SETRES, 0x03 }, /* e */
{ PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */
};
static const struct alps_nibble_commands alps_v6_nibble_commands[] = {
{ PSMOUSE_CMD_ENABLE, 0x00 }, /* 0 */
{ PSMOUSE_CMD_SETRATE, 0x0a }, /* 1 */
{ PSMOUSE_CMD_SETRATE, 0x14 }, /* 2 */
{ PSMOUSE_CMD_SETRATE, 0x28 }, /* 3 */
{ PSMOUSE_CMD_SETRATE, 0x3c }, /* 4 */
{ PSMOUSE_CMD_SETRATE, 0x50 }, /* 5 */
{ PSMOUSE_CMD_SETRATE, 0x64 }, /* 6 */
{ PSMOUSE_CMD_SETRATE, 0xc8 }, /* 7 */
{ PSMOUSE_CMD_GETID, 0x00 }, /* 8 */
{ PSMOUSE_CMD_GETINFO, 0x00 }, /* 9 */
{ PSMOUSE_CMD_SETRES, 0x00 }, /* a */
{ PSMOUSE_CMD_SETRES, 0x01 }, /* b */
{ PSMOUSE_CMD_SETRES, 0x02 }, /* c */
{ PSMOUSE_CMD_SETRES, 0x03 }, /* d */
{ PSMOUSE_CMD_SETSCALE21, 0x00 }, /* e */
{ PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */
};
#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 */
#define ALPS_IS_RUSHMORE 0x100 /* device is a rushmore */
#define ALPS_BUTTONPAD 0x200 /* device is a clickpad */
static const struct alps_model_info alps_model_data[] = {
{ { 0x32, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
{ { 0x33, 0x02, 0x0a }, 0x00, ALPS_PROTO_V1, 0x88, 0xf8, 0 }, /* UMAX-530T */
{ { 0x53, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
{ { 0x53, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
{ { 0x60, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 }, /* HP ze1115 */
{ { 0x63, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
{ { 0x63, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
{ { 0x63, 0x02, 0x28 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Fujitsu Siemens S6010 */
{ { 0x63, 0x02, 0x3c }, 0x00, ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */
{ { 0x63, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 }, /* NEC Versa L320 */
{ { 0x63, 0x02, 0x64 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
{ { 0x63, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D800 */
{ { 0x73, 0x00, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT }, /* ThinkPad R61 8918-5QG */
{ { 0x73, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
{ { 0x73, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Ahtec Laptop */
{ { 0x20, 0x02, 0x0e }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
{ { 0x22, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
{ { 0x22, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
/* Dell Latitude E5500, E6400, E6500, Precision M4400 */
{ { 0x62, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf,
ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
{ { 0x73, 0x00, 0x14 }, 0x00, ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT }, /* Dell XT2 */
{ { 0x73, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS }, /* Dell Vostro 1400 */
{ { 0x52, 0x01, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff,
ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED }, /* Toshiba Tecra A11-11L */
{ { 0x73, 0x02, 0x64 }, 0x8a, ALPS_PROTO_V4, 0x8f, 0x8f, 0 },
};
static void alps_set_abs_params_st(struct alps_data *priv,
struct input_dev *dev1);
static void alps_set_abs_params_mt(struct alps_data *priv,
struct input_dev *dev1);
/*
* 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.
*/
/* Packet formats are described in Documentation/input/alps.txt */
static bool alps_is_valid_first_byte(struct alps_data *priv,
unsigned char data)
{
return (data & priv->mask0) == priv->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_v1_v2(struct psmouse *psmouse)
{
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;
int back = 0, forward = 0;
if (priv->proto_version == ALPS_PROTO_V1) {
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 (priv->flags & ALPS_FW_BK_1) {
back = packet[0] & 0x10;
forward = packet[2] & 4;
}
if (priv->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 ((priv->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 (priv->flags & ALPS_WHEEL)
input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
input_report_key(dev, BTN_FORWARD, forward);
input_report_key(dev, BTN_BACK, back);
}
if (priv->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);
}
/*
* Process bitmap data for V5 protocols. Return value is null.
*
* The bitmaps don't have enough data to track fingers, so this function
* only generates points representing a bounding box of at most two contacts.
* These two points are returned in fields->mt.
*/
static void alps_process_bitmap_dolphin(struct alps_data *priv,
struct alps_fields *fields)
{
int box_middle_x, box_middle_y;
unsigned int x_map, y_map;
unsigned char start_bit, end_bit;
unsigned char x_msb, x_lsb, y_msb, y_lsb;
x_map = fields->x_map;
y_map = fields->y_map;
if (!x_map || !y_map)
return;
/* Get Most-significant and Least-significant bit */
x_msb = fls(x_map);
x_lsb = ffs(x_map);
y_msb = fls(y_map);
y_lsb = ffs(y_map);
/* Most-significant bit should never exceed max sensor line number */
if (x_msb > priv->x_bits || y_msb > priv->y_bits)
return;
if (fields->fingers > 1) {
start_bit = priv->x_bits - x_msb;
end_bit = priv->x_bits - x_lsb;
box_middle_x = (priv->x_max * (start_bit + end_bit)) /
(2 * (priv->x_bits - 1));
start_bit = y_lsb - 1;
end_bit = y_msb - 1;
box_middle_y = (priv->y_max * (start_bit + end_bit)) /
(2 * (priv->y_bits - 1));
fields->mt[0] = fields->st;
fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
}
}
static void alps_get_bitmap_points(unsigned int map,
struct alps_bitmap_point *low,
struct alps_bitmap_point *high,
int *fingers)
{
struct alps_bitmap_point *point;
int i, bit, prev_bit = 0;
point = low;
for (i = 0; map != 0; i++, map >>= 1) {
bit = map & 1;
if (bit) {
if (!prev_bit) {
point->start_bit = i;
point->num_bits = 0;
(*fingers)++;
}
point->num_bits++;
} else {
if (prev_bit)
point = high;
}
prev_bit = bit;
}
}
/*
* Process bitmap data from v3 and v4 protocols. Returns the number of
* fingers detected. A return value of 0 means at least one of the
* bitmaps was empty.
*
* The bitmaps don't have enough data to track fingers, so this function
* only generates points representing a bounding box of all contacts.
* These points are returned in fields->mt when the return value
* is greater than 0.
*/
static int alps_process_bitmap(struct alps_data *priv,
struct alps_fields *fields)
{
int i, fingers_x = 0, fingers_y = 0, fingers;
struct alps_bitmap_point x_low = {0,}, x_high = {0,};
struct alps_bitmap_point y_low = {0,}, y_high = {0,};
if (!fields->x_map || !fields->y_map)
return 0;
alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
/*
* Fingers can overlap, so we use the maximum count of fingers
* on either axis as the finger count.
*/
fingers = max(fingers_x, fingers_y);
/*
* If an axis reports only a single contact, we have overlapping or
* adjacent fingers. Divide the single contact between the two points.
*/
if (fingers_x == 1) {
i = (x_low.num_bits - 1) / 2;
x_low.num_bits = x_low.num_bits - i;
x_high.start_bit = x_low.start_bit + i;
x_high.num_bits = max(i, 1);
}
if (fingers_y == 1) {
i = (y_low.num_bits - 1) / 2;
y_low.num_bits = y_low.num_bits - i;
y_high.start_bit = y_low.start_bit + i;
y_high.num_bits = max(i, 1);
}
fields->mt[0].x =
(priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
(2 * (priv->x_bits - 1));
fields->mt[0].y =
(priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
(2 * (priv->y_bits - 1));
fields->mt[1].x =
(priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
(2 * (priv->x_bits - 1));
fields->mt[1].y =
(priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
(2 * (priv->y_bits - 1));
/* y-bitmap order is reversed, except on rushmore */
if (!(priv->flags & ALPS_IS_RUSHMORE)) {
fields->mt[0].y = priv->y_max - fields->mt[0].y;
fields->mt[1].y = priv->y_max - fields->mt[1].y;
}
return fingers;
}
static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
{
input_mt_slot(dev, slot);
input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
input_report_abs(dev, ABS_MT_POSITION_X, x);
input_report_abs(dev, ABS_MT_POSITION_Y, y);
}
static void alps_report_mt_data(struct psmouse *psmouse, int n)
{
struct alps_data *priv = psmouse->private;
struct input_dev *dev = psmouse->dev;
struct alps_fields *f = &priv->f;
int i, slot[MAX_TOUCHES];
input_mt_assign_slots(dev, slot, f->mt, n);
for (i = 0; i < n; i++)
alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
input_mt_sync_frame(dev);
}
static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
{
struct alps_data *priv = psmouse->private;
struct input_dev *dev = psmouse->dev;
struct alps_fields *f = &priv->f;
/* Use st data when we don't have mt data */
if (fingers < 2) {
f->mt[0].x = f->st.x;
f->mt[0].y = f->st.y;
fingers = f->pressure > 0 ? 1 : 0;
}
alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
input_mt_report_finger_count(dev, fingers);
input_report_key(dev, BTN_LEFT, f->left);
input_report_key(dev, BTN_RIGHT, f->right);
input_report_key(dev, BTN_MIDDLE, f->middle);
input_report_abs(dev, ABS_PRESSURE, f->pressure);
input_sync(dev);
}
static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
unsigned char *packet = psmouse->packet;
struct input_dev *dev = priv->dev2;
int x, y, z, left, right, middle;
/* Sanity check packet */
if (!(packet[0] & 0x40)) {
psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
return;
}
/*
* There's a special packet that seems to indicate the end
* of a stream of trackstick data. Filter these out.
*/
if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
return;
x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
z = (packet[4] & 0x7c) >> 2;
/*
* The x and y values tend to be quite large, and when used
* alone the trackstick is difficult to use. Scale them down
* to compensate.
*/
x /= 8;
y /= 8;
input_report_rel(dev, REL_X, x);
input_report_rel(dev, REL_Y, -y);
/*
* Most ALPS models report the trackstick buttons in the touchpad
* packets, but a few report them here. No reliable way has been
* found to differentiate between the models upfront, so we enable
* the quirk in response to seeing a button press in the trackstick
* packet.
*/
left = packet[3] & 0x01;
right = packet[3] & 0x02;
middle = packet[3] & 0x04;
if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
(left || right || middle))
priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
input_report_key(dev, BTN_LEFT, left);
input_report_key(dev, BTN_RIGHT, right);
input_report_key(dev, BTN_MIDDLE, middle);
}
input_sync(dev);
return;
}
static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
{
f->left = !!(p[3] & 0x01);
f->right = !!(p[3] & 0x02);
f->middle = !!(p[3] & 0x04);
f->ts_left = !!(p[3] & 0x10);
f->ts_right = !!(p[3] & 0x20);
f->ts_middle = !!(p[3] & 0x40);
}
static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
struct psmouse *psmouse)
{
f->first_mp = !!(p[4] & 0x40);
f->is_mp = !!(p[0] & 0x40);
f->fingers = (p[5] & 0x3) + 1;
f->x_map = ((p[4] & 0x7e) << 8) |
((p[1] & 0x7f) << 2) |
((p[0] & 0x30) >> 4);
f->y_map = ((p[3] & 0x70) << 4) |
((p[2] & 0x7f) << 1) |
(p[4] & 0x01);
f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
((p[0] & 0x30) >> 4);
f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
f->pressure = p[5] & 0x7f;
alps_decode_buttons_v3(f, p);
return 0;
}
static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
struct psmouse *psmouse)
{
alps_decode_pinnacle(f, p, psmouse);
/* Rushmore's packet decode has a bit difference with Pinnacle's */
f->is_mp = !!(p[5] & 0x40);
f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
f->x_map |= (p[5] & 0x10) << 11;
f->y_map |= (p[5] & 0x20) << 6;
return 0;
}
static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
struct psmouse *psmouse)
{
u64 palm_data = 0;
struct alps_data *priv = psmouse->private;
f->first_mp = !!(p[0] & 0x02);
f->is_mp = !!(p[0] & 0x20);
if (!f->is_mp) {
f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
alps_decode_buttons_v3(f, p);
} else {
f->fingers = ((p[0] & 0x6) >> 1 |
(p[0] & 0x10) >> 2);
palm_data = (p[1] & 0x7f) |
((p[2] & 0x7f) << 7) |
((p[4] & 0x7f) << 14) |
((p[5] & 0x7f) << 21) |
((p[3] & 0x07) << 28) |
(((u64)p[3] & 0x70) << 27) |
(((u64)p[0] & 0x01) << 34);
/* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
f->y_map = palm_data & (BIT(priv->y_bits) - 1);
/* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
f->x_map = (palm_data >> priv->y_bits) &
(BIT(priv->x_bits) - 1);
}
return 0;
}
static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
unsigned char *packet = psmouse->packet;
struct input_dev *dev2 = priv->dev2;
struct alps_fields *f = &priv->f;
int fingers = 0;
memset(f, 0, sizeof(*f));
priv->decode_fields(f, packet, psmouse);
/*
* There's no single feature of touchpad position and bitmap packets
* that can be used to distinguish between them. We rely on the fact
* that a bitmap packet should always follow a position packet with
* bit 6 of packet[4] set.
*/
if (priv->multi_packet) {
/*
* Sometimes a position packet will indicate a multi-packet
* sequence, but then what follows is another position
* packet. Check for this, and when it happens process the
* position packet as usual.
*/
if (f->is_mp) {
fingers = f->fingers;
if (priv->proto_version == ALPS_PROTO_V3) {
if (alps_process_bitmap(priv, f) == 0)
fingers = 0; /* Use st data */
/* Now process position packet */
priv->decode_fields(f, priv->multi_data,
psmouse);
} else {
/*
* Because Dolphin uses position packet's
* coordinate data as Pt1 and uses it to
* calculate Pt2, so we need to do position
* packet decode first.
*/
priv->decode_fields(f, priv->multi_data,
psmouse);
/*
* Since Dolphin's finger number is reliable,
* there is no need to compare with bmap_fn.
*/
alps_process_bitmap_dolphin(priv, f);
}
} else {
priv->multi_packet = 0;
}
}
/*
* Bit 6 of byte 0 is not usually set in position packets. The only
* times it seems to be set is in situations where the data is
* suspect anyway, e.g. a palm resting flat on the touchpad. Given
* this combined with the fact that this bit is useful for filtering
* out misidentified bitmap packets, we reject anything with this
* bit set.
*/
if (f->is_mp)
return;
if (!priv->multi_packet && f->first_mp) {
priv->multi_packet = 1;
memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
return;
}
priv->multi_packet = 0;
/*
* Sometimes the hardware sends a single packet with z = 0
* in the middle of a stream. Real releases generate packets
* with x, y, and z all zero, so these seem to be flukes.
* Ignore them.
*/
if (f->st.x && f->st.y && !f->pressure)
return;
alps_report_semi_mt_data(psmouse, fingers);
if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
input_report_key(dev2, BTN_LEFT, f->ts_left);
input_report_key(dev2, BTN_RIGHT, f->ts_right);
input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
input_sync(dev2);
}
}
static void alps_process_packet_v3(struct psmouse *psmouse)
{
unsigned char *packet = psmouse->packet;
/*
* v3 protocol packets come in three types, two representing
* touchpad data and one representing trackstick data.
* Trackstick packets seem to be distinguished by always
* having 0x3f in the last byte. This value has never been
* observed in the last byte of either of the other types
* of packets.
*/
if (packet[5] == 0x3f) {
alps_process_trackstick_packet_v3(psmouse);
return;
}
alps_process_touchpad_packet_v3_v5(psmouse);
}
static void alps_process_packet_v6(struct psmouse *psmouse)
{
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, left, right, middle;
/*
* We can use Byte5 to distinguish if the packet is from Touchpad
* or Trackpoint.
* Touchpad: 0 - 0x7E
* Trackpoint: 0x7F
*/
if (packet[5] == 0x7F) {
/* It should be a DualPoint when received Trackpoint packet */
if (!(priv->flags & ALPS_DUALPOINT))
return;
/* Trackpoint packet */
x = packet[1] | ((packet[3] & 0x20) << 2);
y = packet[2] | ((packet[3] & 0x40) << 1);
z = packet[4];
left = packet[3] & 0x01;
right = packet[3] & 0x02;
middle = packet[3] & 0x04;
/* To prevent the cursor jump when finger lifted */
if (x == 0x7F && y == 0x7F && z == 0x7F)
x = y = z = 0;
/* Divide 4 since trackpoint's speed is too fast */
input_report_rel(dev2, REL_X, (char)x / 4);
input_report_rel(dev2, REL_Y, -((char)y / 4));
input_report_key(dev2, BTN_LEFT, left);
input_report_key(dev2, BTN_RIGHT, right);
input_report_key(dev2, BTN_MIDDLE, middle);
input_sync(dev2);
return;
}
/* Touchpad packet */
x = packet[1] | ((packet[3] & 0x78) << 4);
y = packet[2] | ((packet[4] & 0x78) << 4);
z = packet[5];
left = packet[3] & 0x01;
right = packet[3] & 0x02;
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);
/* v6 touchpad does not have middle button */
input_report_key(dev, BTN_LEFT, left);
input_report_key(dev, BTN_RIGHT, right);
input_sync(dev);
}
static void alps_process_packet_v4(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
unsigned char *packet = psmouse->packet;
struct alps_fields *f = &priv->f;
int offset;
/*
* v4 has a 6-byte encoding for bitmap data, but this data is
* broken up between 3 normal packets. Use priv->multi_packet to
* track our position in the bitmap packet.
*/
if (packet[6] & 0x40) {
/* sync, reset position */
priv->multi_packet = 0;
}
if (WARN_ON_ONCE(priv->multi_packet > 2))
return;
offset = 2 * priv->multi_packet;
priv->multi_data[offset] = packet[6];
priv->multi_data[offset + 1] = packet[7];
if (++priv->multi_packet > 2) {
priv->multi_packet = 0;
f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
((priv->multi_data[3] & 0x60) << 3) |
((priv->multi_data[0] & 0x3f) << 2) |
((priv->multi_data[1] & 0x60) >> 5);
f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
((priv->multi_data[3] & 0x1f) << 5) |
(priv->multi_data[1] & 0x1f);
f->fingers = alps_process_bitmap(priv, f);
}
f->left = !!(packet[4] & 0x01);
f->right = !!(packet[4] & 0x02);
f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
((packet[0] & 0x30) >> 4);
f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
f->pressure = packet[5] & 0x7f;
alps_report_semi_mt_data(psmouse, f->fingers);
}
static bool alps_is_valid_package_v7(struct psmouse *psmouse)
{
switch (psmouse->pktcnt) {
case 3:
return (psmouse->packet[2] & 0x40) == 0x40;
case 4:
return (psmouse->packet[3] & 0x48) == 0x48;
case 6:
return (psmouse->packet[5] & 0x40) == 0x00;
}
return true;
}
static unsigned char alps_get_packet_id_v7(char *byte)
{
unsigned char packet_id;
if (byte[4] & 0x40)
packet_id = V7_PACKET_ID_TWO;
else if (byte[4] & 0x01)
packet_id = V7_PACKET_ID_MULTI;
else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
packet_id = V7_PACKET_ID_NEW;
else if (byte[1] == 0x00 && byte[4] == 0x00)
packet_id = V7_PACKET_ID_IDLE;
else
packet_id = V7_PACKET_ID_UNKNOWN;
return packet_id;
}
static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
unsigned char *pkt,
unsigned char pkt_id)
{
mt[0].x = ((pkt[2] & 0x80) << 4);
mt[0].x |= ((pkt[2] & 0x3F) << 5);
mt[0].x |= ((pkt[3] & 0x30) >> 1);
mt[0].x |= (pkt[3] & 0x07);
mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
mt[1].x = ((pkt[3] & 0x80) << 4);
mt[1].x |= ((pkt[4] & 0x80) << 3);
mt[1].x |= ((pkt[4] & 0x3F) << 4);
mt[1].y = ((pkt[5] & 0x80) << 3);
mt[1].y |= ((pkt[5] & 0x3F) << 4);
switch (pkt_id) {
case V7_PACKET_ID_TWO:
mt[1].x &= ~0x000F;
mt[1].y |= 0x000F;
break;
case V7_PACKET_ID_MULTI:
mt[1].x &= ~0x003F;
mt[1].y &= ~0x0020;
mt[1].y |= ((pkt[4] & 0x02) << 4);
mt[1].y |= 0x001F;
break;
case V7_PACKET_ID_NEW:
mt[1].x &= ~0x003F;
mt[1].x |= (pkt[0] & 0x20);
mt[1].y |= 0x000F;
break;
}
mt[0].y = 0x7FF - mt[0].y;
mt[1].y = 0x7FF - mt[1].y;
}
static int alps_get_mt_count(struct input_mt_pos *mt)
{
int i;
for (i = 0; i < MAX_TOUCHES && mt[i].x != 0 && mt[i].y != 0; i++)
/* empty */;
return i;
}
static int alps_decode_packet_v7(struct alps_fields *f,
unsigned char *p,
struct psmouse *psmouse)
{
unsigned char pkt_id;
pkt_id = alps_get_packet_id_v7(p);
if (pkt_id == V7_PACKET_ID_IDLE)
return 0;
if (pkt_id == V7_PACKET_ID_UNKNOWN)
return -1;
alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
if (pkt_id == V7_PACKET_ID_TWO || pkt_id == V7_PACKET_ID_MULTI) {
f->left = (p[0] & 0x80) >> 7;
f->right = (p[0] & 0x20) >> 5;
f->middle = (p[0] & 0x10) >> 4;
}
if (pkt_id == V7_PACKET_ID_TWO)
f->fingers = alps_get_mt_count(f->mt);
else if (pkt_id == V7_PACKET_ID_MULTI)
f->fingers = 3 + (p[5] & 0x03);
return 0;
}
static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
unsigned char *packet = psmouse->packet;
struct input_dev *dev2 = priv->dev2;
int x, y, z, left, right, middle;
/*
* b7 b6 b5 b4 b3 b2 b1 b0
* Byte0 0 1 0 0 1 0 0 0
* Byte1 1 1 * * 1 M R L
* Byte2 X7 1 X5 X4 X3 X2 X1 X0
* Byte3 Z6 1 Y6 X6 1 Y2 Y1 Y0
* Byte4 Y7 0 Y5 Y4 Y3 1 1 0
* Byte5 T&P 0 Z5 Z4 Z3 Z2 Z1 Z0
* M / R / L: Middle / Right / Left button
*/
x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
((packet[3] & 0x20) << 1);
z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
left = (packet[1] & 0x01);
right = (packet[1] & 0x02) >> 1;
middle = (packet[1] & 0x04) >> 2;
/* Divide 2 since trackpoint's speed is too fast */
input_report_rel(dev2, REL_X, (char)x / 2);
input_report_rel(dev2, REL_Y, -((char)y / 2));
input_report_key(dev2, BTN_LEFT, left);
input_report_key(dev2, BTN_RIGHT, right);
input_report_key(dev2, BTN_MIDDLE, middle);
input_sync(dev2);
}
static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
struct input_dev *dev = psmouse->dev;
struct alps_fields *f = &priv->f;
memset(f, 0, sizeof(*f));
if (priv->decode_fields(f, psmouse->packet, psmouse))
return;
alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
input_mt_report_finger_count(dev, f->fingers);
input_report_key(dev, BTN_LEFT, f->left);
input_report_key(dev, BTN_RIGHT, f->right);
input_report_key(dev, BTN_MIDDLE, f->middle);
input_sync(dev);
}
static void alps_process_packet_v7(struct psmouse *psmouse)
{
unsigned char *packet = psmouse->packet;
if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
alps_process_trackstick_packet_v7(psmouse);
else
alps_process_touchpad_packet_v7(psmouse);
}
static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
unsigned char packet[],
bool report_buttons)
{
struct alps_data *priv = psmouse->private;
struct input_dev *dev2 = priv->dev2;
if (report_buttons)
alps_report_buttons(psmouse, dev2, psmouse->dev,
packet[0] & 1, packet[0] & 2, 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);
}
static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
if (psmouse->pktcnt < 6)
return PSMOUSE_GOOD_DATA;
if (psmouse->pktcnt == 6) {
/*
* Start a timer to flush the packet if it ends up last
* 6-byte packet in the stream. Timer needs to fire
* psmouse core times out itself. 20 ms should be enough
* to decide if we are getting more data or not.
*/
mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
return PSMOUSE_GOOD_DATA;
}
del_timer(&priv->timer);
if (psmouse->packet[6] & 0x80) {
/*
* Highest bit is set - that means we either had
* complete ALPS packet and this is start of the
* next packet or we got garbage.
*/
if (((psmouse->packet[3] |
psmouse->packet[4] |
psmouse->packet[5]) & 0x80) ||
(!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
psmouse_dbg(psmouse,
"refusing packet %4ph (suspected interleaved ps/2)\n",
psmouse->packet + 3);
return PSMOUSE_BAD_DATA;
}
priv->process_packet(psmouse);
/* Continue with the next packet */
psmouse->packet[0] = psmouse->packet[6];
psmouse->pktcnt = 1;
} else {
/*
* High bit is 0 - that means that we indeed got a PS/2
* packet in the middle of ALPS packet.
*
* There is also possibility that we got 6-byte ALPS
* packet followed by 3-byte packet from trackpoint. We
* can not distinguish between these 2 scenarios but
* because the latter is unlikely to happen in course of
* normal operation (user would need to press all
* buttons on the pad and start moving trackpoint
* without touching the pad surface) we assume former.
* Even if we are wrong the wost thing that would happen
* the cursor would jump but we should not get protocol
* de-synchronization.
*/
alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
false);
/*
* Continue with the standard ALPS protocol handling,
* but make sure we won't process it as an interleaved
* packet again, which may happen if all buttons are
* pressed. To avoid this let's reset the 4th bit which
* is normally 1.
*/
psmouse->packet[3] = psmouse->packet[6] & 0xf7;
psmouse->pktcnt = 4;
}
return PSMOUSE_GOOD_DATA;
}
static void alps_flush_packet(unsigned long data)
{
struct psmouse *psmouse = (struct psmouse *)data;
struct alps_data *priv = psmouse->private;
serio_pause_rx(psmouse->ps2dev.serio);
if (psmouse->pktcnt == psmouse->pktsize) {
/*
* We did not any more data in reasonable amount of time.
* Validate the last 3 bytes and process as a standard
* ALPS packet.
*/
if ((psmouse->packet[3] |
psmouse->packet[4] |
psmouse->packet[5]) & 0x80) {
psmouse_dbg(psmouse,
"refusing packet %3ph (suspected interleaved ps/2)\n",
psmouse->packet + 3);
} else {
priv->process_packet(psmouse);
}
psmouse->pktcnt = 0;
}
serio_continue_rx(psmouse->ps2dev.serio);
}
static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
/*
* Check if we are dealing with a bare PS/2 packet, presumably from
* a device connected to the external PS/2 port. Because bare PS/2
* protocol does not have enough constant bits to self-synchronize
* properly we only do this if the device is fully synchronized.
*/
if (!psmouse->out_of_sync_cnt && (psmouse->packet[0] & 0xc8) == 0x08) {
if (psmouse->pktcnt == 3) {
alps_report_bare_ps2_packet(psmouse, psmouse->packet,
true);
return PSMOUSE_FULL_PACKET;
}
return PSMOUSE_GOOD_DATA;
}
/* Check for PS/2 packet stuffed in the middle of ALPS packet. */
if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
return alps_handle_interleaved_ps2(psmouse);
}
if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
psmouse_dbg(psmouse,
"refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
psmouse->packet[0], priv->mask0, priv->byte0);
return PSMOUSE_BAD_DATA;
}
/* Bytes 2 - pktsize should have 0 in the highest bit */
if (priv->proto_version < ALPS_PROTO_V5 &&
psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
(psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
psmouse->pktcnt - 1,
psmouse->packet[psmouse->pktcnt - 1]);
if (priv->proto_version == ALPS_PROTO_V3 &&
psmouse->pktcnt == psmouse->pktsize) {
/*
* Some Dell boxes, such as Latitude E6440 or E7440
* with closed lid, quite often smash last byte of
* otherwise valid packet with 0xff. Given that the
* next packet is very likely to be valid let's
* report PSMOUSE_FULL_PACKET but not process data,
* rather than reporting PSMOUSE_BAD_DATA and
* filling the logs.
*/
return PSMOUSE_FULL_PACKET;
}
return PSMOUSE_BAD_DATA;
}
if (priv->proto_version == ALPS_PROTO_V7 &&
!alps_is_valid_package_v7(psmouse)) {
psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
psmouse->pktcnt - 1,
psmouse->packet[psmouse->pktcnt - 1]);
return PSMOUSE_BAD_DATA;
}
if (psmouse->pktcnt == psmouse->pktsize) {
priv->process_packet(psmouse);
return PSMOUSE_FULL_PACKET;
}
return PSMOUSE_GOOD_DATA;
}
static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
struct alps_data *priv = psmouse->private;
int command;
unsigned char *param;
unsigned char dummy[4];
BUG_ON(nibble > 0xf);
command = priv->nibble_commands[nibble].command;
param = (command & 0x0f00) ?
dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
if (ps2_command(ps2dev, param, command))
return -1;
return 0;
}
static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
struct alps_data *priv = psmouse->private;
int i, nibble;
if (ps2_command(ps2dev, NULL, priv->addr_command))
return -1;
for (i = 12; i >= 0; i -= 4) {
nibble = (addr >> i) & 0xf;
if (alps_command_mode_send_nibble(psmouse, nibble))
return -1;
}
return 0;
}
static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[4];
if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
return -1;
/*
* The address being read is returned in the first two bytes
* of the result. Check that this address matches the expected
* address.
*/
if (addr != ((param[0] << 8) | param[1]))
return -1;
return param[2];
}
static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
{
if (alps_command_mode_set_addr(psmouse, addr))
return -1;
return __alps_command_mode_read_reg(psmouse, addr);
}
static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
{
if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
return -1;
if (alps_command_mode_send_nibble(psmouse, value & 0xf))
return -1;
return 0;
}
static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
u8 value)
{
if (alps_command_mode_set_addr(psmouse, addr))
return -1;
return __alps_command_mode_write_reg(psmouse, value);
}
static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
int repeated_command, unsigned char *param)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
param[0] = 0;
if (init_command && ps2_command(ps2dev, param, init_command))
return -EIO;
if (ps2_command(ps2dev, NULL, repeated_command) ||
ps2_command(ps2dev, NULL, repeated_command) ||
ps2_command(ps2dev, NULL, repeated_command))
return -EIO;
param[0] = param[1] = param[2] = 0xff;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
return -EIO;
psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
repeated_command, param);
return 0;
}
static bool alps_check_valid_firmware_id(unsigned char id[])
{
if (id[0] == 0x73)
return true;
if (id[0] == 0x88 &&
(id[1] == 0x07 ||
id[1] == 0x08 ||
(id[1] & 0xf0) == 0xb0 ||
(id[1] & 0xf0) == 0xc0)) {
return true;
}
return false;
}
static int alps_enter_command_mode(struct psmouse *psmouse)
{
unsigned char param[4];
if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
psmouse_err(psmouse, "failed to enter command mode\n");
return -1;
}
if (!alps_check_valid_firmware_id(param)) {
psmouse_dbg(psmouse,
"unknown response while entering command mode\n");
return -1;
}
return 0;
}
static inline int alps_exit_command_mode(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
return -1;
return 0;
}
/*
* 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_v2(struct psmouse *psmouse, bool enable)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
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_drain(ps2dev, 3, 100);
return 0;
}
static int alps_absolute_mode_v1_v2(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_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
{
int i, nibble;
/*
* b0-b11 are valid bits, send sequence is inverse.
* e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
*/
for (i = 0; i <= 8; i += 4) {
nibble = (word >> i) & 0xf;
if (alps_command_mode_send_nibble(psmouse, nibble))
return -1;
}
return 0;
}
static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
u16 addr, u16 value)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
/* 0x0A0 is the command to write the word */
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
alps_monitor_mode_send_word(psmouse, 0x0A0) ||
alps_monitor_mode_send_word(psmouse, addr) ||
alps_monitor_mode_send_word(psmouse, value) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
return -1;
return 0;
}
static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
if (enable) {
/* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
return -1;
} else {
/* EC to exit monitor mode */
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
return -1;
}
return 0;
}
static int alps_absolute_mode_v6(struct psmouse *psmouse)
{
u16 reg_val = 0x181;
int ret = -1;
/* enter monitor mode, to write the register */
if (alps_monitor_mode(psmouse, true))
return -1;
ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
if (alps_monitor_mode(psmouse, false))
ret = -1;
return ret;
}
static int alps_get_status(struct psmouse *psmouse, char *param)
{
/* Get status: 0xF5 0xF5 0xF5 0xE9 */
if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
return -1;
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;
}
/*
* alps_poll() - poll the touchpad for current motion packet.
* Used in resync.
*/
static int alps_poll(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
unsigned char buf[sizeof(psmouse->packet)];
bool poll_failed;
if (priv->flags & ALPS_PASS)
alps_passthrough_mode_v2(psmouse, true);
poll_failed = ps2_command(&psmouse->ps2dev, buf,
PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
if (priv->flags & ALPS_PASS)
alps_passthrough_mode_v2(psmouse, false);
if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
return -1;
if ((psmouse->badbyte & 0xc8) == 0x08) {
/*
* Poll the track stick ...
*/
if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
return -1;
}
memcpy(psmouse->packet, buf, sizeof(buf));
return 0;
}
static int alps_hw_init_v1_v2(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
if ((priv->flags & ALPS_PASS) &&
alps_passthrough_mode_v2(psmouse, true)) {
return -1;
}
if (alps_tap_mode(psmouse, true)) {
psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
return -1;
}
if (alps_absolute_mode_v1_v2(psmouse)) {
psmouse_err(psmouse, "Failed to enable absolute mode\n");
return -1;
}
if ((priv->flags & ALPS_PASS) &&
alps_passthrough_mode_v2(psmouse, false)) {
return -1;
}
/* ALPS needs stream mode, otherwise it won't report any data */
if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
psmouse_err(psmouse, "Failed to enable stream mode\n");
return -1;
}
return 0;
}
static int alps_hw_init_v6(struct psmouse *psmouse)
{
unsigned char param[2] = {0xC8, 0x14};
/* Enter passthrough mode to let trackpoint enter 6byte raw mode */
if (alps_passthrough_mode_v2(psmouse, true))
return -1;
if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
return -1;
if (alps_passthrough_mode_v2(psmouse, false))
return -1;
if (alps_absolute_mode_v6(psmouse)) {
psmouse_err(psmouse, "Failed to enable absolute mode\n");
return -1;
}
return 0;
}
/*
* Enable or disable passthrough mode to the trackstick.
*/
static int alps_passthrough_mode_v3(struct psmouse *psmouse,
int reg_base, bool enable)
{
int reg_val, ret = -1;
if (alps_enter_command_mode(psmouse))
return -1;
reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
if (reg_val == -1)
goto error;
if (enable)
reg_val |= 0x01;
else
reg_val &= ~0x01;
ret = __alps_command_mode_write_reg(psmouse, reg_val);
error:
if (alps_exit_command_mode(psmouse))
ret = -1;
return ret;
}
/* Must be in command mode when calling this function */
static int alps_absolute_mode_v3(struct psmouse *psmouse)
{
int reg_val;
reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
if (reg_val == -1)
return -1;
reg_val |= 0x06;
if (__alps_command_mode_write_reg(psmouse, reg_val))
return -1;
return 0;
}
static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
{
int ret = -EIO, reg_val;
if (alps_enter_command_mode(psmouse))
goto error;
reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
if (reg_val == -1)
goto error;
/* bit 7: trackstick is present */
ret = reg_val & 0x80 ? 0 : -ENODEV;
error:
alps_exit_command_mode(psmouse);
return ret;
}
static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
int ret = 0;
unsigned char param[4];
if (alps_passthrough_mode_v3(psmouse, reg_base, true))
return -EIO;
/*
* E7 report for the trackstick
*
* There have been reports of failures to seem to trace back
* to the above trackstick check failing. When these occur
* this E7 report fails, so when that happens we continue
* with the assumption that there isn't a trackstick after
* all.
*/
if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
psmouse_warn(psmouse, "trackstick E7 report failed\n");
ret = -ENODEV;
} else {
psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
/*
* Not sure what this does, but it is absolutely
* essential. Without it, the touchpad does not
* work at all and the trackstick just emits normal
* PS/2 packets.
*/
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
alps_command_mode_send_nibble(psmouse, 0x9) ||
alps_command_mode_send_nibble(psmouse, 0x4)) {
psmouse_err(psmouse,
"Error sending magic E6 sequence\n");
ret = -EIO;
goto error;
}
/*
* This ensures the trackstick packets are in the format
* supported by this driver. If bit 1 isn't set the packet
* format is different.
*/
if (alps_enter_command_mode(psmouse) ||
alps_command_mode_write_reg(psmouse,
reg_base + 0x08, 0x82) ||
alps_exit_command_mode(psmouse))
ret = -EIO;
}
error:
if (alps_passthrough_mode_v3(psmouse, reg_base, false))
ret = -EIO;
return ret;
}
static int alps_hw_init_v3(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
int reg_val;
unsigned char param[4];
reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
if (reg_val == -EIO)
goto error;
if (reg_val == 0 &&
alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
goto error;
if (alps_enter_command_mode(psmouse) ||
alps_absolute_mode_v3(psmouse)) {
psmouse_err(psmouse, "Failed to enter absolute mode\n");
goto error;
}
reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
if (reg_val == -1)
goto error;
if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
goto error;
reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
if (reg_val == -1)
goto error;
if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
goto error;
if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
goto error;
if (__alps_command_mode_write_reg(psmouse, 0x04))
goto error;
if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
goto error;
if (__alps_command_mode_write_reg(psmouse, 0x03))
goto error;
if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
goto error;
if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
goto error;
if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
goto error;
if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
goto error;
alps_exit_command_mode(psmouse);
/* Set rate and enable data reporting */
param[0] = 0x64;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
psmouse_err(psmouse, "Failed to enable data reporting\n");
return -1;
}
return 0;
error:
/*
* Leaving the touchpad in command mode will essentially render
* it unusable until the machine reboots, so exit it here just
* to be safe
*/
alps_exit_command_mode(psmouse);
return -1;
}
static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
{
int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
struct alps_data *priv = psmouse->private;
reg = alps_command_mode_read_reg(psmouse, reg_pitch);
if (reg < 0)
return reg;
x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
if (reg < 0)
return reg;
x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
x_electrode = 17 + x_electrode;
y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
y_electrode = 13 + y_electrode;
x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
psmouse_dbg(psmouse,
"pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
x_pitch, y_pitch, x_electrode, y_electrode,
x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
return 0;
}
static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
struct ps2dev *ps2dev = &psmouse->ps2dev;
int reg_val, ret = -1;
if (priv->flags & ALPS_DUALPOINT) {
reg_val = alps_setup_trackstick_v3(psmouse,
ALPS_REG_BASE_RUSHMORE);
if (reg_val == -EIO)
goto error;
if (reg_val == -ENODEV)
priv->flags &= ~ALPS_DUALPOINT;
}
if (alps_enter_command_mode(psmouse) ||
alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
goto error;
if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
goto error;
reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
if (reg_val == -1)
goto error;
if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
goto error;
if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
goto error;
/* enter absolute mode */
reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
if (reg_val == -1)
goto error;
if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
goto error;
alps_exit_command_mode(psmouse);
return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
error:
alps_exit_command_mode(psmouse);
return ret;
}
/* Must be in command mode when calling this function */
static int alps_absolute_mode_v4(struct psmouse *psmouse)
{
int reg_val;
reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
if (reg_val == -1)
return -1;
reg_val |= 0x02;
if (__alps_command_mode_write_reg(psmouse, reg_val))
return -1;
return 0;
}
static int alps_hw_init_v4(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[4];
if (alps_enter_command_mode(psmouse))
goto error;
if (alps_absolute_mode_v4(psmouse)) {
psmouse_err(psmouse, "Failed to enter absolute mode\n");
goto error;
}
if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
goto error;
if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
goto error;
if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
goto error;
if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
goto error;
if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
goto error;
if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
goto error;
if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
goto error;
if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
goto error;
alps_exit_command_mode(psmouse);
/*
* This sequence changes the output from a 9-byte to an
* 8-byte format. All the same data seems to be present,
* just in a more compact format.
*/
param[0] = 0xc8;
param[1] = 0x64;
param[2] = 0x50;
if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
return -1;
/* Set rate and enable data reporting */
param[0] = 0x64;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
psmouse_err(psmouse, "Failed to enable data reporting\n");
return -1;
}
return 0;
error:
/*
* Leaving the touchpad in command mode will essentially render
* it unusable until the machine reboots, so exit it here just
* to be safe
*/
alps_exit_command_mode(psmouse);
return -1;
}
static int alps_dolphin_get_device_area(struct psmouse *psmouse,
struct alps_data *priv)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[4] = {0};
int num_x_electrode, num_y_electrode;
if (alps_enter_command_mode(psmouse))
return -1;
param[0] = 0x0a;
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
return -1;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
return -1;
/*
* Dolphin's sensor line number is not fixed. It can be calculated
* by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
* Further more, we can get device's x_max and y_max by multiplying
* sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
*
* e.g. When we get register's sensor_x = 11 & sensor_y = 8,
* real sensor line number X = 11 + 8 = 19, and
* real sensor line number Y = 8 + 1 = 9.
* So, x_max = (19 - 1) * 64 = 1152, and
* y_max = (9 - 1) * 64 = 512.
*/
num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
priv->x_bits = num_x_electrode;
priv->y_bits = num_y_electrode;
priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
if (alps_exit_command_mode(psmouse))
return -1;
return 0;
}
static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[2];
/* This is dolphin "v1" as empirically defined by florin9doi */
param[0] = 0x64;
param[1] = 0x28;
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
return -1;
return 0;
}
static int alps_hw_init_v7(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
int reg_val, ret = -1;
if (alps_enter_command_mode(psmouse) ||
alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
goto error;
if (alps_get_v3_v7_resolution(psmouse, 0xc397))
goto error;
if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
goto error;
reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
if (reg_val == -1)
goto error;
if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
goto error;
alps_exit_command_mode(psmouse);
return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
error:
alps_exit_command_mode(psmouse);
return ret;
}
static void alps_set_defaults(struct alps_data *priv)
{
priv->byte0 = 0x8f;
priv->mask0 = 0x8f;
priv->flags = ALPS_DUALPOINT;
priv->x_max = 2000;
priv->y_max = 1400;
priv->x_bits = 15;
priv->y_bits = 11;
switch (priv->proto_version) {
case ALPS_PROTO_V1:
case ALPS_PROTO_V2:
priv->hw_init = alps_hw_init_v1_v2;
priv->process_packet = alps_process_packet_v1_v2;
priv->set_abs_params = alps_set_abs_params_st;
priv->x_max = 1023;
priv->y_max = 767;
break;
case ALPS_PROTO_V3:
priv->hw_init = alps_hw_init_v3;
priv->process_packet = alps_process_packet_v3;
priv->set_abs_params = alps_set_abs_params_mt;
priv->decode_fields = alps_decode_pinnacle;
priv->nibble_commands = alps_v3_nibble_commands;
priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
break;
case ALPS_PROTO_V4:
priv->hw_init = alps_hw_init_v4;
priv->process_packet = alps_process_packet_v4;
priv->set_abs_params = alps_set_abs_params_mt;
priv->nibble_commands = alps_v4_nibble_commands;
priv->addr_command = PSMOUSE_CMD_DISABLE;
break;
case ALPS_PROTO_V5:
priv->hw_init = alps_hw_init_dolphin_v1;
priv->process_packet = alps_process_touchpad_packet_v3_v5;
priv->decode_fields = alps_decode_dolphin;
priv->set_abs_params = alps_set_abs_params_mt;
priv->nibble_commands = alps_v3_nibble_commands;
priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
priv->byte0 = 0xc8;
priv->mask0 = 0xd8;
priv->flags = 0;
priv->x_max = 1360;
priv->y_max = 660;
priv->x_bits = 23;
priv->y_bits = 12;
break;
case ALPS_PROTO_V6:
priv->hw_init = alps_hw_init_v6;
priv->process_packet = alps_process_packet_v6;
priv->set_abs_params = alps_set_abs_params_st;
priv->nibble_commands = alps_v6_nibble_commands;
priv->x_max = 2047;
priv->y_max = 1535;
break;
case ALPS_PROTO_V7:
priv->hw_init = alps_hw_init_v7;
priv->process_packet = alps_process_packet_v7;
priv->decode_fields = alps_decode_packet_v7;
priv->set_abs_params = alps_set_abs_params_mt;
priv->nibble_commands = alps_v3_nibble_commands;
priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
priv->x_max = 0xfff;
priv->y_max = 0x7ff;
priv->byte0 = 0x48;
priv->mask0 = 0x48;
if (priv->fw_ver[1] != 0xba)
priv->flags |= ALPS_BUTTONPAD;
break;
}
}
static int alps_match_table(struct psmouse *psmouse, struct alps_data *priv,
unsigned char *e7, unsigned char *ec)
{
const struct alps_model_info *model;
int i;
for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
model = &alps_model_data[i];
if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
(!model->command_mode_resp ||
model->command_mode_resp == ec[2])) {
priv->proto_version = model->proto_version;
alps_set_defaults(priv);
priv->flags = model->flags;
priv->byte0 = model->byte0;
priv->mask0 = model->mask0;
return 0;
}
}
return -EINVAL;
}
static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
{
unsigned char e6[4], e7[4], ec[4];
/*
* First try "E6 report".
* ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
* The bits 0-2 of the first byte will be 1s if some buttons are
* pressed.
*/
if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
PSMOUSE_CMD_SETSCALE11, e6))
return -EIO;
if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
return -EINVAL;
/*
* Now get the "E7" and "EC" reports. These will uniquely identify
* most ALPS touchpads.
*/
if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
PSMOUSE_CMD_SETSCALE21, e7) ||
alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
PSMOUSE_CMD_RESET_WRAP, ec) ||
alps_exit_command_mode(psmouse))
return -EIO;
/* Save the Firmware version */
memcpy(priv->fw_ver, ec, 3);
if (alps_match_table(psmouse, priv, e7, ec) == 0) {
return 0;
} else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
priv->proto_version = ALPS_PROTO_V5;
alps_set_defaults(priv);
if (alps_dolphin_get_device_area(psmouse, priv))
return -EIO;
else
return 0;
} else if (ec[0] == 0x88 &&
((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
priv->proto_version = ALPS_PROTO_V7;
alps_set_defaults(priv);
return 0;
} else if (ec[0] == 0x88 && ec[1] == 0x08) {
priv->proto_version = ALPS_PROTO_V3;
alps_set_defaults(priv);
priv->hw_init = alps_hw_init_rushmore_v3;
priv->decode_fields = alps_decode_rushmore;
priv->x_bits = 16;
priv->y_bits = 12;
priv->flags |= ALPS_IS_RUSHMORE;
/* hack to make addr_command, nibble_command available */
psmouse->private = priv;
if (alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_RUSHMORE))
priv->flags &= ~ALPS_DUALPOINT;
return 0;
} else if (ec[0] == 0x88 && ec[1] == 0x07 &&
ec[2] >= 0x90 && ec[2] <= 0x9d) {
priv->proto_version = ALPS_PROTO_V3;
alps_set_defaults(priv);
return 0;
}
psmouse_dbg(psmouse,
"Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
return -EINVAL;
}
static int alps_reconnect(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
psmouse_reset(psmouse);
if (alps_identify(psmouse, priv) < 0)
return -1;
return priv->hw_init(psmouse);
}
static void alps_disconnect(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
psmouse_reset(psmouse);
del_timer_sync(&priv->timer);
input_unregister_device(priv->dev2);
kfree(priv);
}
static void alps_set_abs_params_st(struct alps_data *priv,
struct input_dev *dev1)
{
input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
}
static void alps_set_abs_params_mt(struct alps_data *priv,
struct input_dev *dev1)
{
input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
input_mt_init_slots(dev1, MAX_TOUCHES, INPUT_MT_POINTER |
INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
/* V7 is real multi-touch */
if (priv->proto_version == ALPS_PROTO_V7)
clear_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
}
int alps_init(struct psmouse *psmouse)
{
struct alps_data *priv;
struct input_dev *dev1 = psmouse->dev, *dev2;
priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
dev2 = input_allocate_device();
if (!priv || !dev2)
goto init_fail;
priv->dev2 = dev2;
setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
psmouse->private = priv;
psmouse_reset(psmouse);
if (alps_identify(psmouse, priv) < 0)
goto init_fail;
if (priv->hw_init(psmouse))
goto init_fail;
/*
* Undo part of setup done for us by psmouse core since touchpad
* is not a relative device.
*/
__clear_bit(EV_REL, dev1->evbit);
__clear_bit(REL_X, dev1->relbit);
__clear_bit(REL_Y, dev1->relbit);
/*
* Now set up our capabilities.
*/
dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
dev1->keybit[BIT_WORD(BTN_LEFT)] |=
BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
priv->set_abs_params(priv, dev1);
/* No pressure on V7 */
if (priv->proto_version != ALPS_PROTO_V7)
input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
if (priv->flags & ALPS_WHEEL) {
dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
}
if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
}
if (priv->flags & ALPS_FOUR_BUTTONS) {
dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
} else if (priv->flags & ALPS_BUTTONPAD) {
set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
clear_bit(BTN_RIGHT, dev1->keybit);
} else {
dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
}
snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
dev2->phys = priv->phys;
dev2->name = (priv->flags & ALPS_DUALPOINT) ?
"DualPoint Stick" : "ALPS PS/2 Device";
dev2->id.bustype = BUS_I8042;
dev2->id.vendor = 0x0002;
dev2->id.product = PSMOUSE_ALPS;
dev2->id.version = 0x0000;
dev2->dev.parent = &psmouse->ps2dev.serio->dev;
dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
dev2->keybit[BIT_WORD(BTN_LEFT)] =
BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
__set_bit(INPUT_PROP_POINTER, dev2->propbit);
if (priv->flags & ALPS_DUALPOINT)
__set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
if (input_register_device(priv->dev2))
goto init_fail;
psmouse->protocol_handler = alps_process_byte;
psmouse->poll = alps_poll;
psmouse->disconnect = alps_disconnect;
psmouse->reconnect = alps_reconnect;
psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
/* We are having trouble resyncing ALPS touchpads so disable it for now */
psmouse->resync_time = 0;
/* Allow 2 invalid packets without resetting device */
psmouse->resetafter = psmouse->pktsize * 2;
return 0;
init_fail:
psmouse_reset(psmouse);
input_free_device(dev2);
kfree(priv);
psmouse->private = NULL;
return -1;
}
int alps_detect(struct psmouse *psmouse, bool set_properties)
{
struct alps_data dummy;
if (alps_identify(psmouse, &dummy) < 0)
return -1;
if (set_properties) {
psmouse->vendor = "ALPS";
psmouse->name = dummy.flags & ALPS_DUALPOINT ?
"DualPoint TouchPad" : "GlidePoint";
psmouse->model = dummy.proto_version << 8;
}
return 0;
}
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