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linux/drivers/input/mouse/alps.c
Dmitry Torokhov d5322d537c Input: alps - use guard notation when acquiring mutex 
This makes the code more compact and error handling more robust
by ensuring that mutexes are released in all code paths when control
leaves critical section.

Acked-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/ZsrBkWIpyEqzClUG@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05 22:52:37 -07:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* 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).
*/
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <linux/dmi.h>
#include "psmouse.h"
#include "alps.h"
#include "trackpoint.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_V7 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_STICK_BITS 0x100 /* separate stick button bits */
#define ALPS_BUTTONPAD 0x200 /* device is a clickpad */
#define ALPS_DUALPOINT_WITH_PRESSURE 0x400 /* device can report trackpoint pressure */
static const struct alps_model_info alps_model_data[] = {
/*
* 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.
*/
{ { 0x20, 0x02, 0x0e }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
{ { 0x22, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
{ { 0x22, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D600 */
{ { 0x32, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Toshiba Salellite Pro M10 */
{ { 0x33, 0x02, 0x0a }, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } }, /* UMAX-530T */
{ { 0x52, 0x01, 0x14 }, { ALPS_PROTO_V2, 0xff, 0xff,
ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, /* Toshiba Tecra A11-11L */
{ { 0x53, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
{ { 0x53, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
{ { 0x60, 0x03, 0xc8 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, /* HP ze1115 */
{ { 0x62, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xcf, 0xcf,
ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
{ { 0x63, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
{ { 0x63, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
{ { 0x63, 0x02, 0x28 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Fujitsu Siemens S6010 */
{ { 0x63, 0x02, 0x3c }, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } }, /* Toshiba Satellite S2400-103 */
{ { 0x63, 0x02, 0x50 }, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } }, /* NEC Versa L320 */
{ { 0x63, 0x02, 0x64 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
{ { 0x63, 0x03, 0xc8 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D800 */
{ { 0x73, 0x00, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } }, /* ThinkPad R61 8918-5QG */
{ { 0x73, 0x00, 0x14 }, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } }, /* Dell XT2 */
{ { 0x73, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
{ { 0x73, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Ahtec Laptop */
{ { 0x73, 0x02, 0x50 }, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } }, /* Dell Vostro 1400 */
};
static const struct alps_protocol_info alps_v3_protocol_data = {
ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE
};
static const struct alps_protocol_info alps_v3_rushmore_data = {
ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE
};
static const struct alps_protocol_info alps_v4_protocol_data = {
ALPS_PROTO_V4, 0x8f, 0x8f, 0
};
static const struct alps_protocol_info alps_v5_protocol_data = {
ALPS_PROTO_V5, 0xc8, 0xd8, 0
};
static const struct alps_protocol_info alps_v7_protocol_data = {
ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE
};
static const struct alps_protocol_info alps_v8_protocol_data = {
ALPS_PROTO_V8, 0x18, 0x18, 0
};
static const struct alps_protocol_info alps_v9_protocol_data = {
ALPS_PROTO_V9, 0xc8, 0xc8, 0
};
/*
* Some v2 models report the stick buttons in separate bits
*/
static const struct dmi_system_id alps_dmi_has_separate_stick_buttons[] = {
#if defined(CONFIG_DMI) && defined(CONFIG_X86)
{
/* Extrapolated from other entries */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D420"),
},
},
{
/* Reported-by: Hans de Bruin <jmdebruin@xmsnet.nl> */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D430"),
},
},
{
/* Reported-by: Hans de Goede <hdegoede@redhat.com> */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D620"),
},
},
{
/* Extrapolated from other entries */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D630"),
},
},
#endif
{ }
};
static void alps_set_abs_params_st(struct alps_data *priv,
struct input_dev *dev1);
static void alps_set_abs_params_semi_mt(struct alps_data *priv,
struct input_dev *dev1);
static void alps_set_abs_params_v7(struct alps_data *priv,
struct input_dev *dev1);
static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
struct input_dev *dev1);
/* Packet formats are described in Documentation/input/devices/alps.rst */
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 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 = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
input_report_key(dev, BTN_LEFT, left);
dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
input_report_key(dev, BTN_RIGHT, right);
dev = (dev2 && 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.
*/
if (dev2)
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(dev2, dev, left, right, middle);
input_sync(dev2);
return;
}
/* Some models have separate stick button bits */
if (priv->flags & ALPS_STICK_BITS) {
left |= packet[0] & 1;
right |= packet[0] & 2;
middle |= packet[0] & 4;
}
alps_report_buttons(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);
}
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 semi-mt 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, closest;
struct alps_bitmap_point x_low = {0,}, x_high = {0,};
struct alps_bitmap_point y_low = {0,}, y_high = {0,};
struct input_mt_pos corner[4];
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);
}
/* top-left corner */
corner[0].x =
(priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
(2 * (priv->x_bits - 1));
corner[0].y =
(priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
(2 * (priv->y_bits - 1));
/* top-right corner */
corner[1].x =
(priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
(2 * (priv->x_bits - 1));
corner[1].y =
(priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
(2 * (priv->y_bits - 1));
/* bottom-right corner */
corner[2].x =
(priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
(2 * (priv->x_bits - 1));
corner[2].y =
(priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
(2 * (priv->y_bits - 1));
/* bottom-left corner */
corner[3].x =
(priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
(2 * (priv->x_bits - 1));
corner[3].y =
(priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
(2 * (priv->y_bits - 1));
/* x-bitmap order is reversed on v5 touchpads */
if (priv->proto_version == ALPS_PROTO_V5) {
for (i = 0; i < 4; i++)
corner[i].x = priv->x_max - corner[i].x;
}
/* y-bitmap order is reversed on v3 and v4 touchpads */
if (priv->proto_version == ALPS_PROTO_V3 ||
priv->proto_version == ALPS_PROTO_V4) {
for (i = 0; i < 4; i++)
corner[i].y = priv->y_max - corner[i].y;
}
/*
* We only select a corner for the second touch once per 2 finger
* touch sequence to avoid the chosen corner (and thus the coordinates)
* jumping around when the first touch is in the middle.
*/
if (priv->second_touch == -1) {
/* Find corner closest to our st coordinates */
closest = 0x7fffffff;
for (i = 0; i < 4; i++) {
int dx = fields->st.x - corner[i].x;
int dy = fields->st.y - corner[i].y;
int distance = dx * dx + dy * dy;
if (distance < closest) {
priv->second_touch = i;
closest = distance;
}
}
/* And select the opposite corner to use for the 2nd touch */
priv->second_touch = (priv->second_touch + 2) % 4;
}
fields->mt[0] = fields->st;
fields->mt[1] = corner[priv->second_touch];
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, 0);
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;
priv->second_touch = -1;
}
if (fingers >= 1)
alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y);
if (fingers >= 2)
alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y);
input_mt_sync_frame(dev);
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;
/* It should be a DualPoint when received trackstick packet */
if (!(priv->flags & ALPS_DUALPOINT)) {
psmouse_warn(psmouse,
"Rejected trackstick packet from non DualPoint device");
return;
}
/* 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] & 0x7f;
/*
* 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);
input_report_abs(dev, ABS_PRESSURE, z);
/*
* 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);
if (f->is_mp) {
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);
} else {
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)
{
f->first_mp = !!(p[4] & 0x40);
f->is_mp = !!(p[5] & 0x40);
if (f->is_mp) {
f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
f->x_map = ((p[5] & 0x10) << 11) |
((p[4] & 0x7e) << 8) |
((p[1] & 0x7f) << 2) |
((p[0] & 0x30) >> 4);
f->y_map = ((p[5] & 0x20) << 6) |
((p[3] & 0x70) << 4) |
((p[2] & 0x7f) << 1) |
(p[4] & 0x01);
} else {
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_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;
/*
* Bitmap processing uses position packet's coordinate
* data, so we need to do decode it first.
*/
priv->decode_fields(f, priv->multi_data, psmouse);
if (alps_process_bitmap(priv, f) == 0)
fingers = 0; /* Use st data */
} 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->flags & ALPS_DUALPOINT) &&
!(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;
/*
* 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)) {
psmouse_warn(psmouse,
"Rejected trackstick packet from non DualPoint device");
return;
}
/* Trackpoint packet */
x = packet[1] | ((packet[3] & 0x20) << 2);
y = packet[2] | ((packet[3] & 0x40) << 1);
z = packet[4];
/* 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, (s8)x / 4);
input_report_rel(dev2, REL_Y, -((s8)y / 4));
psmouse_report_standard_buttons(dev2, packet[3]);
input_sync(dev2);
return;
}
/* Touchpad packet */
x = packet[1] | ((packet[3] & 0x78) << 4);
y = packet[2] | ((packet[4] & 0x78) << 4);
z = packet[5];
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 */
packet[3] &= ~BIT(2);
psmouse_report_standard_buttons(dev2, packet[3]);
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];
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;
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);
}
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;
/* Detect false-positive touches where x & y report max value */
if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
mt[1].x = 0;
/* y gets set to 0 at the end of this function */
}
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, fingers = 0;
for (i = 0; i < MAX_TOUCHES; i++) {
if (mt[i].x != 0 || mt[i].y != 0)
fingers++;
}
return fingers;
}
static int alps_decode_packet_v7(struct alps_fields *f,
unsigned char *p,
struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
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;
/*
* NEW packets are send to indicate a discontinuity in the finger
* coordinate reporting. Specifically a finger may have moved from
* slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
* us.
*
* NEW packets have 3 problems:
* 1) They do not contain middle / right button info (on non clickpads)
* this can be worked around by preserving the old button state
* 2) They do not contain an accurate fingercount, and they are
* typically send when the number of fingers changes. We cannot use
* the old finger count as that may mismatch with the amount of
* touch coordinates we've available in the NEW packet
* 3) Their x data for the second touch is inaccurate leading to
* a possible jump of the x coordinate by 16 units when the first
* non NEW packet comes in
* Since problems 2 & 3 cannot be worked around, just ignore them.
*/
if (pkt_id == V7_PACKET_ID_NEW)
return 1;
alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
if (pkt_id == V7_PACKET_ID_TWO)
f->fingers = alps_get_mt_count(f->mt);
else /* pkt_id == V7_PACKET_ID_MULTI */
f->fingers = 3 + (p[5] & 0x03);
f->left = (p[0] & 0x80) >> 7;
if (priv->flags & ALPS_BUTTONPAD) {
if (p[0] & 0x20)
f->fingers++;
if (p[0] & 0x10)
f->fingers++;
} else {
f->right = (p[0] & 0x20) >> 5;
f->middle = (p[0] & 0x10) >> 4;
}
/* Sometimes a single touch is reported in mt[1] rather then mt[0] */
if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
f->mt[0].x = f->mt[1].x;
f->mt[0].y = f->mt[1].y;
f->mt[1].x = 0;
f->mt[1].y = 0;
}
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;
/* It should be a DualPoint when received trackstick packet */
if (!(priv->flags & ALPS_DUALPOINT)) {
psmouse_warn(psmouse,
"Rejected trackstick packet from non DualPoint device");
return;
}
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);
input_report_rel(dev2, REL_X, (s8)x);
input_report_rel(dev2, REL_Y, -((s8)y));
input_report_abs(dev2, ABS_PRESSURE, z);
psmouse_report_standard_buttons(dev2, packet[1]);
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 enum SS4_PACKET_ID alps_get_pkt_id_ss4_v2(unsigned char *byte)
{
enum SS4_PACKET_ID pkt_id = SS4_PACKET_ID_IDLE;
switch (byte[3] & 0x30) {
case 0x00:
if (SS4_IS_IDLE_V2(byte)) {
pkt_id = SS4_PACKET_ID_IDLE;
} else {
pkt_id = SS4_PACKET_ID_ONE;
}
break;
case 0x10:
/* two-finger finger positions */
pkt_id = SS4_PACKET_ID_TWO;
break;
case 0x20:
/* stick pointer */
pkt_id = SS4_PACKET_ID_STICK;
break;
case 0x30:
/* third and fourth finger positions */
pkt_id = SS4_PACKET_ID_MULTI;
break;
}
return pkt_id;
}
static int alps_decode_ss4_v2(struct alps_fields *f,
unsigned char *p, struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
enum SS4_PACKET_ID pkt_id;
unsigned int no_data_x, no_data_y;
pkt_id = alps_get_pkt_id_ss4_v2(p);
/* Current packet is 1Finger coordinate packet */
switch (pkt_id) {
case SS4_PACKET_ID_ONE:
f->mt[0].x = SS4_1F_X_V2(p);
f->mt[0].y = SS4_1F_Y_V2(p);
f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
/*
* When a button is held the device will give us events
* with x, y, and pressure of 0. This causes annoying jumps
* if a touch is released while the button is held.
* Handle this by claiming zero contacts.
*/
f->fingers = f->pressure > 0 ? 1 : 0;
f->first_mp = 0;
f->is_mp = 0;
break;
case SS4_PACKET_ID_TWO:
if (priv->flags & ALPS_BUTTONPAD) {
if (IS_SS4PLUS_DEV(priv->dev_id)) {
f->mt[0].x = SS4_PLUS_BTL_MF_X_V2(p, 0);
f->mt[1].x = SS4_PLUS_BTL_MF_X_V2(p, 1);
} else {
f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
}
f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
} else {
if (IS_SS4PLUS_DEV(priv->dev_id)) {
f->mt[0].x = SS4_PLUS_STD_MF_X_V2(p, 0);
f->mt[1].x = SS4_PLUS_STD_MF_X_V2(p, 1);
} else {
f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
}
f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
}
f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
if (SS4_IS_MF_CONTINUE(p)) {
f->first_mp = 1;
} else {
f->fingers = 2;
f->first_mp = 0;
}
f->is_mp = 0;
break;
case SS4_PACKET_ID_MULTI:
if (priv->flags & ALPS_BUTTONPAD) {
if (IS_SS4PLUS_DEV(priv->dev_id)) {
f->mt[2].x = SS4_PLUS_BTL_MF_X_V2(p, 0);
f->mt[3].x = SS4_PLUS_BTL_MF_X_V2(p, 1);
no_data_x = SS4_PLUS_MFPACKET_NO_AX_BL;
} else {
f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
no_data_x = SS4_MFPACKET_NO_AX_BL;
}
no_data_y = SS4_MFPACKET_NO_AY_BL;
f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
} else {
if (IS_SS4PLUS_DEV(priv->dev_id)) {
f->mt[2].x = SS4_PLUS_STD_MF_X_V2(p, 0);
f->mt[3].x = SS4_PLUS_STD_MF_X_V2(p, 1);
no_data_x = SS4_PLUS_MFPACKET_NO_AX;
} else {
f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
no_data_x = SS4_MFPACKET_NO_AX;
}
no_data_y = SS4_MFPACKET_NO_AY;
f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
}
f->first_mp = 0;
f->is_mp = 1;
if (SS4_IS_5F_DETECTED(p)) {
f->fingers = 5;
} else if (f->mt[3].x == no_data_x &&
f->mt[3].y == no_data_y) {
f->mt[3].x = 0;
f->mt[3].y = 0;
f->fingers = 3;
} else {
f->fingers = 4;
}
break;
case SS4_PACKET_ID_STICK:
/*
* x, y, and pressure are decoded in
* alps_process_packet_ss4_v2()
*/
f->first_mp = 0;
f->is_mp = 0;
break;
case SS4_PACKET_ID_IDLE:
default:
memset(f, 0, sizeof(struct alps_fields));
break;
}
/* handle buttons */
if (pkt_id == SS4_PACKET_ID_STICK) {
f->ts_left = !!(SS4_BTN_V2(p) & 0x01);
f->ts_right = !!(SS4_BTN_V2(p) & 0x02);
f->ts_middle = !!(SS4_BTN_V2(p) & 0x04);
} else {
f->left = !!(SS4_BTN_V2(p) & 0x01);
if (!(priv->flags & ALPS_BUTTONPAD)) {
f->right = !!(SS4_BTN_V2(p) & 0x02);
f->middle = !!(SS4_BTN_V2(p) & 0x04);
}
}
return 0;
}
static void alps_process_packet_ss4_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;
struct alps_fields *f = &priv->f;
memset(f, 0, sizeof(struct alps_fields));
priv->decode_fields(f, packet, psmouse);
if (priv->multi_packet) {
/*
* Sometimes the first packet will indicate a multi-packet
* sequence, but sometimes the next multi-packet would not
* come. Check for this, and when it happens process the
* position packet as usual.
*/
if (f->is_mp) {
/* Now process the 1st packet */
priv->decode_fields(f, priv->multi_data, psmouse);
} else {
priv->multi_packet = 0;
}
}
/*
* "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
* When it is set, it means 2nd packet comes without 1st packet come.
*/
if (f->is_mp)
return;
/* Save the first packet */
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;
/* Report trackstick */
if (alps_get_pkt_id_ss4_v2(packet) == SS4_PACKET_ID_STICK) {
if (!(priv->flags & ALPS_DUALPOINT)) {
psmouse_warn(psmouse,
"Rejected trackstick packet from non DualPoint device");
return;
}
input_report_rel(dev2, REL_X, SS4_TS_X_V2(packet));
input_report_rel(dev2, REL_Y, SS4_TS_Y_V2(packet));
input_report_abs(dev2, ABS_PRESSURE, SS4_TS_Z_V2(packet));
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);
return;
}
/* Report touchpad */
alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
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_report_abs(dev, ABS_PRESSURE, f->pressure);
input_sync(dev);
}
static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
{
if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
return false;
if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
return false;
return true;
}
static DEFINE_MUTEX(alps_mutex);
static int alps_do_register_bare_ps2_mouse(struct alps_data *priv)
{
struct psmouse *psmouse = priv->psmouse;
struct input_dev *dev3;
int error;
dev3 = input_allocate_device();
if (!dev3) {
psmouse_err(psmouse, "failed to allocate secondary device\n");
return -ENOMEM;
}
snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
psmouse->ps2dev.serio->phys,
(priv->dev2 ? "input2" : "input1"));
dev3->phys = priv->phys3;
/*
* format of input device name is: "protocol vendor name"
* see function psmouse_switch_protocol() in psmouse-base.c
*/
dev3->name = "PS/2 ALPS Mouse";
dev3->id.bustype = BUS_I8042;
dev3->id.vendor = 0x0002;
dev3->id.product = PSMOUSE_PS2;
dev3->id.version = 0x0000;
dev3->dev.parent = &psmouse->ps2dev.serio->dev;
input_set_capability(dev3, EV_REL, REL_X);
input_set_capability(dev3, EV_REL, REL_Y);
input_set_capability(dev3, EV_KEY, BTN_LEFT);
input_set_capability(dev3, EV_KEY, BTN_RIGHT);
input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
__set_bit(INPUT_PROP_POINTER, dev3->propbit);
error = input_register_device(dev3);
if (error) {
psmouse_err(psmouse,
"failed to register secondary device: %d\n",
error);
goto err_free_input;
}
priv->dev3 = dev3;
return 0;
err_free_input:
input_free_device(dev3);
return error;
}
static void alps_register_bare_ps2_mouse(struct work_struct *work)
{
struct alps_data *priv = container_of(work, struct alps_data,
dev3_register_work.work);
int error;
guard(mutex)(&alps_mutex);
if (!priv->dev3) {
error = alps_do_register_bare_ps2_mouse(priv);
if (error) {
/*
* Save the error code so that we can detect that we
* already tried to create the device.
*/
priv->dev3 = ERR_PTR(error);
}
}
}
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 *dev, *dev2 = NULL;
/* Figure out which device to use to report the bare packet */
if (priv->proto_version == ALPS_PROTO_V2 &&
(priv->flags & ALPS_DUALPOINT)) {
/* On V2 devices the DualPoint Stick reports bare packets */
dev = priv->dev2;
dev2 = psmouse->dev;
} else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
/* Register dev3 mouse if we received PS/2 packet first time */
if (!IS_ERR(priv->dev3))
psmouse_queue_work(psmouse, &priv->dev3_register_work,
0);
return;
} else {
dev = priv->dev3;
}
if (report_buttons)
alps_report_buttons(dev, dev2,
packet[0] & 1, packet[0] & 2, packet[0] & 4);
psmouse_report_standard_motion(dev, packet);
input_sync(dev);
}
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(struct timer_list *t)
{
struct alps_data *priv = from_timer(priv, t, timer);
struct psmouse *psmouse = priv->psmouse;
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.
* Can not distinguish V8's first byte from PS/2 packet's
*/
if (priv->proto_version != ALPS_PROTO_V8 &&
!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_RUSHMORE &&
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)) ||
(priv->proto_version == ALPS_PROTO_V8 &&
!alps_is_valid_package_ss4_v2(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(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;
/* 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;
}
/* Must be in passthrough mode when calling this function */
static int alps_trackstick_enter_extended_mode_v3_v6(struct psmouse *psmouse)
{
unsigned char param[2] = {0xC8, 0x14};
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;
return 0;
}
static int alps_hw_init_v6(struct psmouse *psmouse)
{
int ret;
/* Enter passthrough mode to let trackpoint enter 6byte raw mode */
if (alps_passthrough_mode_v2(psmouse, true))
return -1;
ret = alps_trackstick_enter_extended_mode_v3_v6(psmouse);
if (alps_passthrough_mode_v2(psmouse, false))
return -1;
if (ret)
return ret;
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_v7(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)
{
int ret = 0;
int reg_val;
unsigned char param[4];
/*
* We need to configure trackstick to report data for touchpad in
* extended format. And also we need to tell touchpad to expect data
* from trackstick in extended format. Without this configuration
* trackstick packets sent from touchpad are in basic format which is
* different from what we expect.
*/
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, "Failed to initialize trackstick (E7 report failed)\n");
ret = -ENODEV;
} else {
psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
if (alps_trackstick_enter_extended_mode_v3_v6(psmouse)) {
psmouse_err(psmouse, "Failed to enter into trackstick extended mode\n");
ret = -EIO;
}
}
if (alps_passthrough_mode_v3(psmouse, reg_base, false))
return -EIO;
if (ret)
return ret;
if (alps_enter_command_mode(psmouse))
return -EIO;
reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
if (reg_val == -1) {
ret = -EIO;
} else {
/*
* Tell touchpad that trackstick is now in extended mode.
* If bit 1 isn't set the packet format is different.
*/
reg_val |= BIT(1);
if (__alps_command_mode_write_reg(psmouse, reg_val))
ret = -EIO;
}
if (alps_exit_command_mode(psmouse))
return -EIO;
return ret;
}
static int alps_hw_init_v3(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
struct ps2dev *ps2dev = &psmouse->ps2dev;
int reg_val;
unsigned char param[4];
if ((priv->flags & ALPS_DUALPOINT) &&
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 = (s8)(reg << 4) >> 4; /* sign extend lower 4 bits */
x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
y_pitch = (s8)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 = (s8)(reg << 4) >> 4; /* sign extend lower 4 bits */
x_electrode = 17 + x_electrode;
y_electrode = (s8)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 (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_get_otp_values_ss4_v2(struct psmouse *psmouse,
unsigned char index, unsigned char otp[])
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
switch (index) {
case 0:
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
return -1;
break;
case 1:
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
return -1;
break;
}
return 0;
}
static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
struct alps_data *priv)
{
int num_x_electrode;
int num_y_electrode;
int x_pitch, y_pitch, x_phys, y_phys;
if (IS_SS4PLUS_DEV(priv->dev_id)) {
num_x_electrode =
SS4PLUS_NUMSENSOR_XOFFSET + (otp[0][2] & 0x0F);
num_y_electrode =
SS4PLUS_NUMSENSOR_YOFFSET + ((otp[0][2] >> 4) & 0x0F);
priv->x_max =
(num_x_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
priv->y_max =
(num_y_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
x_pitch = (otp[0][1] & 0x0F) + SS4PLUS_MIN_PITCH_MM;
y_pitch = ((otp[0][1] >> 4) & 0x0F) + SS4PLUS_MIN_PITCH_MM;
} else {
num_x_electrode =
SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
num_y_electrode =
SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
priv->x_max =
(num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
priv->y_max =
(num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
}
x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
y_phys = y_pitch * (num_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 */
return 0;
}
static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
struct alps_data *priv)
{
unsigned char is_btnless;
if (IS_SS4PLUS_DEV(priv->dev_id))
is_btnless = (otp[1][0] >> 1) & 0x01;
else
is_btnless = (otp[1][1] >> 3) & 0x01;
if (is_btnless)
priv->flags |= ALPS_BUTTONPAD;
return 0;
}
static int alps_update_dual_info_ss4_v2(unsigned char otp[][4],
struct alps_data *priv,
struct psmouse *psmouse)
{
bool is_dual = false;
int reg_val = 0;
struct ps2dev *ps2dev = &psmouse->ps2dev;
if (IS_SS4PLUS_DEV(priv->dev_id)) {
is_dual = (otp[0][0] >> 4) & 0x01;
if (!is_dual) {
/* For support TrackStick of Thinkpad L/E series */
if (alps_exit_command_mode(psmouse) == 0 &&
alps_enter_command_mode(psmouse) == 0) {
reg_val = alps_command_mode_read_reg(psmouse,
0xD7);
}
alps_exit_command_mode(psmouse);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
if (reg_val == 0x0C || reg_val == 0x1D)
is_dual = true;
}
}
if (is_dual)
priv->flags |= ALPS_DUALPOINT |
ALPS_DUALPOINT_WITH_PRESSURE;
return 0;
}
static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
struct alps_data *priv)
{
unsigned char otp[2][4];
memset(otp, 0, sizeof(otp));
if (alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]) ||
alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]))
return -1;
alps_update_device_area_ss4_v2(otp, priv);
alps_update_btn_info_ss4_v2(otp, priv);
alps_update_dual_info_ss4_v2(otp, priv, psmouse);
return 0;
}
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 int alps_hw_init_ss4_v2(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
char param[2] = {0x64, 0x28};
int ret = -1;
/* enter absolute mode */
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
goto error;
}
/* T.B.D. Decread noise packet number, delete in the future */
if (alps_exit_command_mode(psmouse) ||
alps_enter_command_mode(psmouse) ||
alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
goto error;
}
alps_exit_command_mode(psmouse);
return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
error:
alps_exit_command_mode(psmouse);
return ret;
}
static int alps_set_protocol(struct psmouse *psmouse,
struct alps_data *priv,
const struct alps_protocol_info *protocol)
{
psmouse->private = priv;
timer_setup(&priv->timer, alps_flush_packet, 0);
priv->proto_version = protocol->version;
priv->byte0 = protocol->byte0;
priv->mask0 = protocol->mask0;
priv->flags = protocol->flags;
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;
if (dmi_check_system(alps_dmi_has_separate_stick_buttons))
priv->flags |= ALPS_STICK_BITS;
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_semi_mt;
priv->decode_fields = alps_decode_pinnacle;
priv->nibble_commands = alps_v3_nibble_commands;
priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
if (alps_probe_trackstick_v3_v7(psmouse,
ALPS_REG_BASE_PINNACLE) < 0)
priv->flags &= ~ALPS_DUALPOINT;
break;
case ALPS_PROTO_V3_RUSHMORE:
priv->hw_init = alps_hw_init_rushmore_v3;
priv->process_packet = alps_process_packet_v3;
priv->set_abs_params = alps_set_abs_params_semi_mt;
priv->decode_fields = alps_decode_rushmore;
priv->nibble_commands = alps_v3_nibble_commands;
priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
priv->x_bits = 16;
priv->y_bits = 12;
if (alps_probe_trackstick_v3_v7(psmouse,
ALPS_REG_BASE_RUSHMORE) < 0)
priv->flags &= ~ALPS_DUALPOINT;
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_semi_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_semi_mt;
priv->nibble_commands = alps_v3_nibble_commands;
priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
priv->x_bits = 23;
priv->y_bits = 12;
if (alps_dolphin_get_device_area(psmouse, priv))
return -EIO;
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_v7;
priv->nibble_commands = alps_v3_nibble_commands;
priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
priv->x_max = 0xfff;
priv->y_max = 0x7ff;
if (priv->fw_ver[1] != 0xba)
priv->flags |= ALPS_BUTTONPAD;
if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
priv->flags &= ~ALPS_DUALPOINT;
break;
case ALPS_PROTO_V8:
priv->hw_init = alps_hw_init_ss4_v2;
priv->process_packet = alps_process_packet_ss4_v2;
priv->decode_fields = alps_decode_ss4_v2;
priv->set_abs_params = alps_set_abs_params_ss4_v2;
priv->nibble_commands = alps_v3_nibble_commands;
priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
if (alps_set_defaults_ss4_v2(psmouse, priv))
return -EIO;
break;
}
return 0;
}
static const struct alps_protocol_info *alps_match_table(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)))
return &model->protocol_info;
}
return NULL;
}
static bool alps_is_cs19_trackpoint(struct psmouse *psmouse)
{
u8 param[2] = { 0 };
if (ps2_command(&psmouse->ps2dev,
param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
return false;
/*
* param[0] contains the trackpoint device variant_id while
* param[1] contains the firmware_id. So far all alps
* trackpoint-only devices have their variant_ids equal
* TP_VARIANT_ALPS and their firmware_ids are in 0x20~0x2f range.
*/
return param[0] == TP_VARIANT_ALPS && ((param[1] & 0xf0) == 0x20);
}
static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
{
const struct alps_protocol_info *protocol;
unsigned char e6[4], e7[4], ec[4];
int error;
/*
* 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;
protocol = alps_match_table(e7, ec);
if (!protocol) {
if (e7[0] == 0x73 && e7[1] == 0x02 && e7[2] == 0x64 &&
ec[2] == 0x8a) {
protocol = &alps_v4_protocol_data;
} else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
protocol = &alps_v5_protocol_data;
} else if (ec[0] == 0x88 &&
((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
protocol = &alps_v7_protocol_data;
} else if (ec[0] == 0x88 && ec[1] == 0x08) {
protocol = &alps_v3_rushmore_data;
} else if (ec[0] == 0x88 && ec[1] == 0x07 &&
ec[2] >= 0x90 && ec[2] <= 0x9d) {
protocol = &alps_v3_protocol_data;
} else if (e7[0] == 0x73 && e7[1] == 0x03 &&
(e7[2] == 0x14 || e7[2] == 0x28)) {
protocol = &alps_v8_protocol_data;
} else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0xc8) {
protocol = &alps_v9_protocol_data;
psmouse_warn(psmouse,
"Unsupported ALPS V9 touchpad: E7=%3ph, EC=%3ph\n",
e7, ec);
return -EINVAL;
} else {
psmouse_dbg(psmouse,
"Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
return -EINVAL;
}
}
if (priv) {
/* Save Device ID and Firmware version */
memcpy(priv->dev_id, e7, 3);
memcpy(priv->fw_ver, ec, 3);
error = alps_set_protocol(psmouse, priv, protocol);
if (error)
return error;
}
return 0;
}
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);
timer_shutdown_sync(&priv->timer);
if (priv->dev2)
input_unregister_device(priv->dev2);
if (!IS_ERR_OR_NULL(priv->dev3))
input_unregister_device(priv->dev3);
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);
input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
}
static void alps_set_abs_params_mt_common(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);
set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
}
static void alps_set_abs_params_semi_mt(struct alps_data *priv,
struct input_dev *dev1)
{
alps_set_abs_params_mt_common(priv, dev1);
input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
input_mt_init_slots(dev1, MAX_TOUCHES,
INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
INPUT_MT_SEMI_MT);
}
static void alps_set_abs_params_v7(struct alps_data *priv,
struct input_dev *dev1)
{
alps_set_abs_params_mt_common(priv, dev1);
set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
input_mt_init_slots(dev1, MAX_TOUCHES,
INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
INPUT_MT_TRACK);
set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
}
static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
struct input_dev *dev1)
{
alps_set_abs_params_mt_common(priv, dev1);
input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
input_mt_init_slots(dev1, MAX_TOUCHES,
INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
INPUT_MT_TRACK);
}
int alps_init(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
struct input_dev *dev1 = psmouse->dev;
int error;
error = priv->hw_init(psmouse);
if (error)
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);
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);
}
if (priv->flags & ALPS_DUALPOINT) {
struct input_dev *dev2;
dev2 = input_allocate_device();
if (!dev2) {
psmouse_err(psmouse,
"failed to allocate trackstick device\n");
error = -ENOMEM;
goto init_fail;
}
snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
psmouse->ps2dev.serio->phys);
dev2->phys = priv->phys2;
/*
* format of input device name is: "protocol vendor name"
* see function psmouse_switch_protocol() in psmouse-base.c
*/
dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
dev2->id.bustype = BUS_I8042;
dev2->id.vendor = 0x0002;
dev2->id.product = PSMOUSE_ALPS;
dev2->id.version = priv->proto_version;
dev2->dev.parent = &psmouse->ps2dev.serio->dev;
input_set_capability(dev2, EV_REL, REL_X);
input_set_capability(dev2, EV_REL, REL_Y);
if (priv->flags & ALPS_DUALPOINT_WITH_PRESSURE) {
input_set_capability(dev2, EV_ABS, ABS_PRESSURE);
input_set_abs_params(dev2, ABS_PRESSURE, 0, 127, 0, 0);
}
input_set_capability(dev2, EV_KEY, BTN_LEFT);
input_set_capability(dev2, EV_KEY, BTN_RIGHT);
input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
__set_bit(INPUT_PROP_POINTER, dev2->propbit);
__set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
error = input_register_device(dev2);
if (error) {
psmouse_err(psmouse,
"failed to register trackstick device: %d\n",
error);
input_free_device(dev2);
goto init_fail;
}
priv->dev2 = dev2;
}
priv->psmouse = psmouse;
INIT_DELAYED_WORK(&priv->dev3_register_work,
alps_register_bare_ps2_mouse);
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);
/*
* Even though we did not allocate psmouse->private we do free
* it here.
*/
kfree(psmouse->private);
psmouse->private = NULL;
return error;
}
int alps_detect(struct psmouse *psmouse, bool set_properties)
{
struct alps_data *priv;
int error;
error = alps_identify(psmouse, NULL);
if (error)
return error;
/*
* ALPS cs19 is a trackpoint-only device, and uses different
* protocol than DualPoint ones, so we return -EINVAL here and let
* trackpoint.c drive this device. If the trackpoint driver is not
* enabled, the device will fall back to a bare PS/2 mouse.
* If ps2_command() fails here, we depend on the immediately
* followed psmouse_reset() to reset the device to normal state.
*/
if (alps_is_cs19_trackpoint(psmouse)) {
psmouse_dbg(psmouse,
"ALPS CS19 trackpoint-only device detected, ignoring\n");
return -EINVAL;
}
/*
* Reset the device to make sure it is fully operational:
* on some laptops, like certain Dell Latitudes, we may
* fail to properly detect presence of trackstick if device
* has not been reset.
*/
psmouse_reset(psmouse);
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
error = alps_identify(psmouse, priv);
if (error) {
kfree(priv);
return error;
}
if (set_properties) {
psmouse->vendor = "ALPS";
psmouse->name = priv->flags & ALPS_DUALPOINT ?
"DualPoint TouchPad" : "GlidePoint";
psmouse->model = priv->proto_version;
} else {
/*
* Destroy alps_data structure we allocated earlier since
* this was just a "trial run". Otherwise we'll keep it
* to be used by alps_init() which has to be called if
* we succeed and set_properties is true.
*/
kfree(priv);
psmouse->private = NULL;
}
return 0;
}
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