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linuxdebug/drivers/hid/hid-magicmouse.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Apple "Magic" Wireless Mouse driver
*
* Copyright (c) 2010 Michael Poole <mdpoole@troilus.org>
* Copyright (c) 2010 Chase Douglas <chase.douglas@canonical.com>
*/
/*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/input/mt.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include "hid-ids.h"
static bool emulate_3button = true;
module_param(emulate_3button, bool, 0644);
MODULE_PARM_DESC(emulate_3button, "Emulate a middle button");
static int middle_button_start = -350;
static int middle_button_stop = +350;
static bool emulate_scroll_wheel = true;
module_param(emulate_scroll_wheel, bool, 0644);
MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
static unsigned int scroll_speed = 32;
static int param_set_scroll_speed(const char *val,
const struct kernel_param *kp) {
unsigned long speed;
if (!val || kstrtoul(val, 0, &speed) || speed > 63)
return -EINVAL;
scroll_speed = speed;
return 0;
}
module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644);
MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)");
static bool scroll_acceleration = false;
module_param(scroll_acceleration, bool, 0644);
MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events");
static bool report_undeciphered;
module_param(report_undeciphered, bool, 0644);
MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
#define TRACKPAD2_2021_BT_VERSION 0x110
#define TRACKPAD_REPORT_ID 0x28
#define TRACKPAD2_USB_REPORT_ID 0x02
#define TRACKPAD2_BT_REPORT_ID 0x31
#define MOUSE_REPORT_ID 0x29
#define MOUSE2_REPORT_ID 0x12
#define DOUBLE_REPORT_ID 0xf7
#define USB_BATTERY_TIMEOUT_MS 60000
/* These definitions are not precise, but they're close enough. (Bits
* 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
* to be some kind of bit mask -- 0x20 may be a near-field reading,
* and 0x40 is actual contact, and 0x10 may be a start/stop or change
* indication.)
*/
#define TOUCH_STATE_MASK 0xf0
#define TOUCH_STATE_NONE 0x00
#define TOUCH_STATE_START 0x30
#define TOUCH_STATE_DRAG 0x40
/* Number of high-resolution events for each low-resolution detent. */
#define SCROLL_HR_STEPS 10
#define SCROLL_HR_MULT (120 / SCROLL_HR_STEPS)
#define SCROLL_HR_THRESHOLD 90 /* units */
#define SCROLL_ACCEL_DEFAULT 7
/* Touch surface information. Dimension is in hundredths of a mm, min and max
* are in units. */
#define MOUSE_DIMENSION_X (float)9056
#define MOUSE_MIN_X -1100
#define MOUSE_MAX_X 1258
#define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100))
#define MOUSE_DIMENSION_Y (float)5152
#define MOUSE_MIN_Y -1589
#define MOUSE_MAX_Y 2047
#define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100))
#define TRACKPAD_DIMENSION_X (float)13000
#define TRACKPAD_MIN_X -2909
#define TRACKPAD_MAX_X 3167
#define TRACKPAD_RES_X \
((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100))
#define TRACKPAD_DIMENSION_Y (float)11000
#define TRACKPAD_MIN_Y -2456
#define TRACKPAD_MAX_Y 2565
#define TRACKPAD_RES_Y \
((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100))
#define TRACKPAD2_DIMENSION_X (float)16000
#define TRACKPAD2_MIN_X -3678
#define TRACKPAD2_MAX_X 3934
#define TRACKPAD2_RES_X \
((TRACKPAD2_MAX_X - TRACKPAD2_MIN_X) / (TRACKPAD2_DIMENSION_X / 100))
#define TRACKPAD2_DIMENSION_Y (float)11490
#define TRACKPAD2_MIN_Y -2478
#define TRACKPAD2_MAX_Y 2587
#define TRACKPAD2_RES_Y \
((TRACKPAD2_MAX_Y - TRACKPAD2_MIN_Y) / (TRACKPAD2_DIMENSION_Y / 100))
/**
* struct magicmouse_sc - Tracks Magic Mouse-specific data.
* @input: Input device through which we report events.
* @quirks: Currently unused.
* @ntouches: Number of touches in most recent touch report.
* @scroll_accel: Number of consecutive scroll motions.
* @scroll_jiffies: Time of last scroll motion.
* @touches: Most recent data for a touch, indexed by tracking ID.
* @tracking_ids: Mapping of current touch input data to @touches.
*/
struct magicmouse_sc {
struct input_dev *input;
unsigned long quirks;
int ntouches;
int scroll_accel;
unsigned long scroll_jiffies;
struct {
short x;
short y;
short scroll_x;
short scroll_y;
short scroll_x_hr;
short scroll_y_hr;
u8 size;
bool scroll_x_active;
bool scroll_y_active;
} touches[16];
int tracking_ids[16];
struct hid_device *hdev;
struct delayed_work work;
struct timer_list battery_timer;
};
static int magicmouse_firm_touch(struct magicmouse_sc *msc)
{
int touch = -1;
int ii;
/* If there is only one "firm" touch, set touch to its
* tracking ID.
*/
for (ii = 0; ii < msc->ntouches; ii++) {
int idx = msc->tracking_ids[ii];
if (msc->touches[idx].size < 8) {
/* Ignore this touch. */
} else if (touch >= 0) {
touch = -1;
break;
} else {
touch = idx;
}
}
return touch;
}
static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
{
int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
test_bit(BTN_RIGHT, msc->input->key) << 1 |
test_bit(BTN_MIDDLE, msc->input->key) << 2;
if (emulate_3button) {
int id;
/* If some button was pressed before, keep it held
* down. Otherwise, if there's exactly one firm
* touch, use that to override the mouse's guess.
*/
if (state == 0) {
/* The button was released. */
} else if (last_state != 0) {
state = last_state;
} else if ((id = magicmouse_firm_touch(msc)) >= 0) {
int x = msc->touches[id].x;
if (x < middle_button_start)
state = 1;
else if (x > middle_button_stop)
state = 2;
else
state = 4;
} /* else: we keep the mouse's guess */
input_report_key(msc->input, BTN_MIDDLE, state & 4);
}
input_report_key(msc->input, BTN_LEFT, state & 1);
input_report_key(msc->input, BTN_RIGHT, state & 2);
if (state != last_state)
msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
}
static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
{
struct input_dev *input = msc->input;
int id, x, y, size, orientation, touch_major, touch_minor, state, down;
int pressure = 0;
if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf;
x = (tdata[1] << 28 | tdata[0] << 20) >> 20;
y = -((tdata[2] << 24 | tdata[1] << 16) >> 20);
size = tdata[5] & 0x3f;
orientation = (tdata[6] >> 2) - 32;
touch_major = tdata[3];
touch_minor = tdata[4];
state = tdata[7] & TOUCH_STATE_MASK;
down = state != TOUCH_STATE_NONE;
} else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
id = tdata[8] & 0xf;
x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
size = tdata[6];
orientation = (tdata[8] >> 5) - 4;
touch_major = tdata[4];
touch_minor = tdata[5];
pressure = tdata[7];
state = tdata[3] & 0xC0;
down = state == 0x80;
} else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf;
x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
size = tdata[6] & 0x3f;
orientation = (tdata[7] >> 2) - 32;
touch_major = tdata[4];
touch_minor = tdata[5];
state = tdata[8] & TOUCH_STATE_MASK;
down = state != TOUCH_STATE_NONE;
}
/* Store tracking ID and other fields. */
msc->tracking_ids[raw_id] = id;
msc->touches[id].x = x;
msc->touches[id].y = y;
msc->touches[id].size = size;
/* If requested, emulate a scroll wheel by detecting small
* vertical touch motions.
*/
if (emulate_scroll_wheel && (input->id.product !=
USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)) {
unsigned long now = jiffies;
int step_x = msc->touches[id].scroll_x - x;
int step_y = msc->touches[id].scroll_y - y;
int step_hr =
max_t(int,
((64 - (int)scroll_speed) * msc->scroll_accel) /
SCROLL_HR_STEPS,
1);
int step_x_hr = msc->touches[id].scroll_x_hr - x;
int step_y_hr = msc->touches[id].scroll_y_hr - y;
/* Calculate and apply the scroll motion. */
switch (state) {
case TOUCH_STATE_START:
msc->touches[id].scroll_x = x;
msc->touches[id].scroll_y = y;
msc->touches[id].scroll_x_hr = x;
msc->touches[id].scroll_y_hr = y;
msc->touches[id].scroll_x_active = false;
msc->touches[id].scroll_y_active = false;
/* Reset acceleration after half a second. */
if (scroll_acceleration && time_before(now,
msc->scroll_jiffies + HZ / 2))
msc->scroll_accel = max_t(int,
msc->scroll_accel - 1, 1);
else
msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
break;
case TOUCH_STATE_DRAG:
step_x /= (64 - (int)scroll_speed) * msc->scroll_accel;
if (step_x != 0) {
msc->touches[id].scroll_x -= step_x *
(64 - scroll_speed) * msc->scroll_accel;
msc->scroll_jiffies = now;
input_report_rel(input, REL_HWHEEL, -step_x);
}
step_y /= (64 - (int)scroll_speed) * msc->scroll_accel;
if (step_y != 0) {
msc->touches[id].scroll_y -= step_y *
(64 - scroll_speed) * msc->scroll_accel;
msc->scroll_jiffies = now;
input_report_rel(input, REL_WHEEL, step_y);
}
if (!msc->touches[id].scroll_x_active &&
abs(step_x_hr) > SCROLL_HR_THRESHOLD) {
msc->touches[id].scroll_x_active = true;
msc->touches[id].scroll_x_hr = x;
step_x_hr = 0;
}
step_x_hr /= step_hr;
if (step_x_hr != 0 &&
msc->touches[id].scroll_x_active) {
msc->touches[id].scroll_x_hr -= step_x_hr *
step_hr;
input_report_rel(input,
REL_HWHEEL_HI_RES,
-step_x_hr * SCROLL_HR_MULT);
}
if (!msc->touches[id].scroll_y_active &&
abs(step_y_hr) > SCROLL_HR_THRESHOLD) {
msc->touches[id].scroll_y_active = true;
msc->touches[id].scroll_y_hr = y;
step_y_hr = 0;
}
step_y_hr /= step_hr;
if (step_y_hr != 0 &&
msc->touches[id].scroll_y_active) {
msc->touches[id].scroll_y_hr -= step_y_hr *
step_hr;
input_report_rel(input,
REL_WHEEL_HI_RES,
step_y_hr * SCROLL_HR_MULT);
}
break;
}
}
if (down)
msc->ntouches++;
input_mt_slot(input, id);
input_mt_report_slot_state(input, MT_TOOL_FINGER, down);
/* Generate the input events for this touch. */
if (down) {
input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2);
input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2);
input_report_abs(input, ABS_MT_ORIENTATION, -orientation);
input_report_abs(input, ABS_MT_POSITION_X, x);
input_report_abs(input, ABS_MT_POSITION_Y, y);
if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)
input_report_abs(input, ABS_MT_PRESSURE, pressure);
if (report_undeciphered) {
if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2)
input_event(input, EV_MSC, MSC_RAW, tdata[7]);
else if (input->id.product !=
USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)
input_event(input, EV_MSC, MSC_RAW, tdata[8]);
}
}
}
static int magicmouse_raw_event(struct hid_device *hdev,
struct hid_report *report, u8 *data, int size)
{
struct magicmouse_sc *msc = hid_get_drvdata(hdev);
struct input_dev *input = msc->input;
int x = 0, y = 0, ii, clicks = 0, npoints;
switch (data[0]) {
case TRACKPAD_REPORT_ID:
case TRACKPAD2_BT_REPORT_ID:
/* Expect four bytes of prefix, and N*9 bytes of touch data. */
if (size < 4 || ((size - 4) % 9) != 0)
return 0;
npoints = (size - 4) / 9;
if (npoints > 15) {
hid_warn(hdev, "invalid size value (%d) for TRACKPAD_REPORT_ID\n",
size);
return 0;
}
msc->ntouches = 0;
for (ii = 0; ii < npoints; ii++)
magicmouse_emit_touch(msc, ii, data + ii * 9 + 4);
clicks = data[1];
/* The following bits provide a device specific timestamp. They
* are unused here.
*
* ts = data[1] >> 6 | data[2] << 2 | data[3] << 10;
*/
break;
case TRACKPAD2_USB_REPORT_ID:
/* Expect twelve bytes of prefix and N*9 bytes of touch data. */
if (size < 12 || ((size - 12) % 9) != 0)
return 0;
npoints = (size - 12) / 9;
if (npoints > 15) {
hid_warn(hdev, "invalid size value (%d) for TRACKPAD2_USB_REPORT_ID\n",
size);
return 0;
}
msc->ntouches = 0;
for (ii = 0; ii < npoints; ii++)
magicmouse_emit_touch(msc, ii, data + ii * 9 + 12);
clicks = data[1];
break;
case MOUSE_REPORT_ID:
/* Expect six bytes of prefix, and N*8 bytes of touch data. */
if (size < 6 || ((size - 6) % 8) != 0)
return 0;
npoints = (size - 6) / 8;
if (npoints > 15) {
hid_warn(hdev, "invalid size value (%d) for MOUSE_REPORT_ID\n",
size);
return 0;
}
msc->ntouches = 0;
for (ii = 0; ii < npoints; ii++)
magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
/* When emulating three-button mode, it is important
* to have the current touch information before
* generating a click event.
*/
x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22;
y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22;
clicks = data[3];
/* The following bits provide a device specific timestamp. They
* are unused here.
*
* ts = data[3] >> 6 | data[4] << 2 | data[5] << 10;
*/
break;
case MOUSE2_REPORT_ID:
/* Size is either 8 or (14 + 8 * N) */
if (size != 8 && (size < 14 || (size - 14) % 8 != 0))
return 0;
npoints = (size - 14) / 8;
if (npoints > 15) {
hid_warn(hdev, "invalid size value (%d) for MOUSE2_REPORT_ID\n",
size);
return 0;
}
msc->ntouches = 0;
for (ii = 0; ii < npoints; ii++)
magicmouse_emit_touch(msc, ii, data + ii * 8 + 14);
/* When emulating three-button mode, it is important
* to have the current touch information before
* generating a click event.
*/
x = (int)((data[3] << 24) | (data[2] << 16)) >> 16;
y = (int)((data[5] << 24) | (data[4] << 16)) >> 16;
clicks = data[1];
/* The following bits provide a device specific timestamp. They
* are unused here.
*
* ts = data[11] >> 6 | data[12] << 2 | data[13] << 10;
*/
break;
case DOUBLE_REPORT_ID:
/* Sometimes the trackpad sends two touch reports in one
* packet.
*/
magicmouse_raw_event(hdev, report, data + 2, data[1]);
magicmouse_raw_event(hdev, report, data + 2 + data[1],
size - 2 - data[1]);
return 0;
default:
return 0;
}
if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
magicmouse_emit_buttons(msc, clicks & 3);
input_report_rel(input, REL_X, x);
input_report_rel(input, REL_Y, y);
} else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
input_mt_sync_frame(input);
input_report_key(input, BTN_MOUSE, clicks & 1);
} else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
input_report_key(input, BTN_MOUSE, clicks & 1);
input_mt_report_pointer_emulation(input, true);
}
input_sync(input);
return 1;
}
static int magicmouse_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
struct magicmouse_sc *msc = hid_get_drvdata(hdev);
if (msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 &&
field->report->id == MOUSE2_REPORT_ID) {
/*
* magic_mouse_raw_event has done all the work. Skip hidinput.
*
* Specifically, hidinput may modify BTN_LEFT and BTN_RIGHT,
* breaking emulate_3button.
*/
return 1;
}
return 0;
}
static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev)
{
int error;
int mt_flags = 0;
__set_bit(EV_KEY, input->evbit);
if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
__set_bit(BTN_LEFT, input->keybit);
__set_bit(BTN_RIGHT, input->keybit);
if (emulate_3button)
__set_bit(BTN_MIDDLE, input->keybit);
__set_bit(EV_REL, input->evbit);
__set_bit(REL_X, input->relbit);
__set_bit(REL_Y, input->relbit);
if (emulate_scroll_wheel) {
__set_bit(REL_WHEEL, input->relbit);
__set_bit(REL_HWHEEL, input->relbit);
__set_bit(REL_WHEEL_HI_RES, input->relbit);
__set_bit(REL_HWHEEL_HI_RES, input->relbit);
}
} else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
/* If the trackpad has been connected to a Mac, the name is
* automatically personalized, e.g., "José Expósito's Trackpad".
* When connected through Bluetooth, the personalized name is
* reported, however, when connected through USB the generic
* name is reported.
* Set the device name to ensure the same driver settings get
* loaded, whether connected through bluetooth or USB.
*/
if (hdev->vendor == BT_VENDOR_ID_APPLE) {
if (input->id.version == TRACKPAD2_2021_BT_VERSION)
input->name = "Apple Inc. Magic Trackpad";
else
input->name = "Apple Inc. Magic Trackpad 2";
} else { /* USB_VENDOR_ID_APPLE */
input->name = hdev->name;
}
__clear_bit(EV_MSC, input->evbit);
__clear_bit(BTN_0, input->keybit);
__clear_bit(BTN_RIGHT, input->keybit);
__clear_bit(BTN_MIDDLE, input->keybit);
__set_bit(BTN_MOUSE, input->keybit);
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
__set_bit(BTN_TOOL_FINGER, input->keybit);
mt_flags = INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
INPUT_MT_TRACK;
} else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
/* input->keybit is initialized with incorrect button info
* for Magic Trackpad. There really is only one physical
* button (BTN_LEFT == BTN_MOUSE). Make sure we don't
* advertise buttons that don't exist...
*/
__clear_bit(BTN_RIGHT, input->keybit);
__clear_bit(BTN_MIDDLE, input->keybit);
__set_bit(BTN_MOUSE, input->keybit);
__set_bit(BTN_TOOL_FINGER, input->keybit);
__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
__set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
__set_bit(BTN_TOOL_QUADTAP, input->keybit);
__set_bit(BTN_TOOL_QUINTTAP, input->keybit);
__set_bit(BTN_TOUCH, input->keybit);
__set_bit(INPUT_PROP_POINTER, input->propbit);
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
}
__set_bit(EV_ABS, input->evbit);
error = input_mt_init_slots(input, 16, mt_flags);
if (error)
return error;
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255 << 2,
4, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255 << 2,
4, 0);
/* Note: Touch Y position from the device is inverted relative
* to how pointer motion is reported (and relative to how USB
* HID recommends the coordinates work). This driver keeps
* the origin at the same position, and just uses the additive
* inverse of the reported Y.
*/
if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
input_set_abs_params(input, ABS_MT_POSITION_X,
MOUSE_MIN_X, MOUSE_MAX_X, 4, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y,
MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0);
input_abs_set_res(input, ABS_MT_POSITION_X,
MOUSE_RES_X);
input_abs_set_res(input, ABS_MT_POSITION_Y,
MOUSE_RES_Y);
} else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 253, 0, 0);
input_set_abs_params(input, ABS_PRESSURE, 0, 253, 0, 0);
input_set_abs_params(input, ABS_MT_ORIENTATION, -3, 4, 0, 0);
input_set_abs_params(input, ABS_X, TRACKPAD2_MIN_X,
TRACKPAD2_MAX_X, 0, 0);
input_set_abs_params(input, ABS_Y, TRACKPAD2_MIN_Y,
TRACKPAD2_MAX_Y, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_X,
TRACKPAD2_MIN_X, TRACKPAD2_MAX_X, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y,
TRACKPAD2_MIN_Y, TRACKPAD2_MAX_Y, 0, 0);
input_abs_set_res(input, ABS_X, TRACKPAD2_RES_X);
input_abs_set_res(input, ABS_Y, TRACKPAD2_RES_Y);
input_abs_set_res(input, ABS_MT_POSITION_X, TRACKPAD2_RES_X);
input_abs_set_res(input, ABS_MT_POSITION_Y, TRACKPAD2_RES_Y);
} else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X,
TRACKPAD_MAX_X, 4, 0);
input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y,
TRACKPAD_MAX_Y, 4, 0);
input_set_abs_params(input, ABS_MT_POSITION_X,
TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y,
TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0);
input_abs_set_res(input, ABS_X, TRACKPAD_RES_X);
input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y);
input_abs_set_res(input, ABS_MT_POSITION_X,
TRACKPAD_RES_X);
input_abs_set_res(input, ABS_MT_POSITION_Y,
TRACKPAD_RES_Y);
}
input_set_events_per_packet(input, 60);
if (report_undeciphered &&
input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
__set_bit(EV_MSC, input->evbit);
__set_bit(MSC_RAW, input->mscbit);
}
/*
* hid-input may mark device as using autorepeat, but neither
* the trackpad, nor the mouse actually want it.
*/
__clear_bit(EV_REP, input->evbit);
return 0;
}
static int magicmouse_input_mapping(struct hid_device *hdev,
struct hid_input *hi, struct hid_field *field,
struct hid_usage *usage, unsigned long **bit, int *max)
{
struct magicmouse_sc *msc = hid_get_drvdata(hdev);
if (!msc->input)
msc->input = hi->input;
/* Magic Trackpad does not give relative data after switching to MT */
if ((hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD ||
hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) &&
field->flags & HID_MAIN_ITEM_RELATIVE)
return -1;
return 0;
}
static int magicmouse_input_configured(struct hid_device *hdev,
struct hid_input *hi)
{
struct magicmouse_sc *msc = hid_get_drvdata(hdev);
int ret;
ret = magicmouse_setup_input(msc->input, hdev);
if (ret) {
hid_err(hdev, "magicmouse setup input failed (%d)\n", ret);
/* clean msc->input to notify probe() of the failure */
msc->input = NULL;
return ret;
}
return 0;
}
static int magicmouse_enable_multitouch(struct hid_device *hdev)
{
const u8 *feature;
const u8 feature_mt[] = { 0xD7, 0x01 };
const u8 feature_mt_mouse2[] = { 0xF1, 0x02, 0x01 };
const u8 feature_mt_trackpad2_usb[] = { 0x02, 0x01 };
const u8 feature_mt_trackpad2_bt[] = { 0xF1, 0x02, 0x01 };
u8 *buf;
int ret;
int feature_size;
if (hdev->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
if (hdev->vendor == BT_VENDOR_ID_APPLE) {
feature_size = sizeof(feature_mt_trackpad2_bt);
feature = feature_mt_trackpad2_bt;
} else { /* USB_VENDOR_ID_APPLE */
feature_size = sizeof(feature_mt_trackpad2_usb);
feature = feature_mt_trackpad2_usb;
}
} else if (hdev->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
feature_size = sizeof(feature_mt_mouse2);
feature = feature_mt_mouse2;
} else {
feature_size = sizeof(feature_mt);
feature = feature_mt;
}
buf = kmemdup(feature, feature_size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = hid_hw_raw_request(hdev, buf[0], buf, feature_size,
HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
kfree(buf);
return ret;
}
static void magicmouse_enable_mt_work(struct work_struct *work)
{
struct magicmouse_sc *msc =
container_of(work, struct magicmouse_sc, work.work);
int ret;
ret = magicmouse_enable_multitouch(msc->hdev);
if (ret < 0)
hid_err(msc->hdev, "unable to request touch data (%d)\n", ret);
}
static int magicmouse_fetch_battery(struct hid_device *hdev)
{
#ifdef CONFIG_HID_BATTERY_STRENGTH
struct hid_report_enum *report_enum;
struct hid_report *report;
if (!hdev->battery || hdev->vendor != USB_VENDOR_ID_APPLE ||
(hdev->product != USB_DEVICE_ID_APPLE_MAGICMOUSE2 &&
hdev->product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2))
return -1;
report_enum = &hdev->report_enum[hdev->battery_report_type];
report = report_enum->report_id_hash[hdev->battery_report_id];
if (!report || report->maxfield < 1)
return -1;
if (hdev->battery_capacity == hdev->battery_max)
return -1;
hid_hw_request(hdev, report, HID_REQ_GET_REPORT);
return 0;
#else
return -1;
#endif
}
static void magicmouse_battery_timer_tick(struct timer_list *t)
{
struct magicmouse_sc *msc = from_timer(msc, t, battery_timer);
struct hid_device *hdev = msc->hdev;
if (magicmouse_fetch_battery(hdev) == 0) {
mod_timer(&msc->battery_timer,
jiffies + msecs_to_jiffies(USB_BATTERY_TIMEOUT_MS));
}
}
static int magicmouse_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
struct magicmouse_sc *msc;
struct hid_report *report;
int ret;
msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL);
if (msc == NULL) {
hid_err(hdev, "can't alloc magicmouse descriptor\n");
return -ENOMEM;
}
msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
msc->hdev = hdev;
INIT_DEFERRABLE_WORK(&msc->work, magicmouse_enable_mt_work);
msc->quirks = id->driver_data;
hid_set_drvdata(hdev, msc);
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "magicmouse hid parse failed\n");
return ret;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "magicmouse hw start failed\n");
return ret;
}
timer_setup(&msc->battery_timer, magicmouse_battery_timer_tick, 0);
mod_timer(&msc->battery_timer,
jiffies + msecs_to_jiffies(USB_BATTERY_TIMEOUT_MS));
magicmouse_fetch_battery(hdev);
if (id->vendor == USB_VENDOR_ID_APPLE &&
(id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
(id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 && hdev->type != HID_TYPE_USBMOUSE)))
return 0;
if (!msc->input) {
hid_err(hdev, "magicmouse input not registered\n");
ret = -ENOMEM;
goto err_stop_hw;
}
if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
report = hid_register_report(hdev, HID_INPUT_REPORT,
MOUSE_REPORT_ID, 0);
else if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2)
report = hid_register_report(hdev, HID_INPUT_REPORT,
MOUSE2_REPORT_ID, 0);
else if (id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
if (id->vendor == BT_VENDOR_ID_APPLE)
report = hid_register_report(hdev, HID_INPUT_REPORT,
TRACKPAD2_BT_REPORT_ID, 0);
else /* USB_VENDOR_ID_APPLE */
report = hid_register_report(hdev, HID_INPUT_REPORT,
TRACKPAD2_USB_REPORT_ID, 0);
} else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
report = hid_register_report(hdev, HID_INPUT_REPORT,
TRACKPAD_REPORT_ID, 0);
report = hid_register_report(hdev, HID_INPUT_REPORT,
DOUBLE_REPORT_ID, 0);
}
if (!report) {
hid_err(hdev, "unable to register touch report\n");
ret = -ENOMEM;
goto err_stop_hw;
}
report->size = 6;
/*
* Some devices repond with 'invalid report id' when feature
* report switching it into multitouch mode is sent to it.
*
* This results in -EIO from the _raw low-level transport callback,
* but there seems to be no other way of switching the mode.
* Thus the super-ugly hacky success check below.
*/
ret = magicmouse_enable_multitouch(hdev);
if (ret != -EIO && ret < 0) {
hid_err(hdev, "unable to request touch data (%d)\n", ret);
goto err_stop_hw;
}
if (ret == -EIO && id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
schedule_delayed_work(&msc->work, msecs_to_jiffies(500));
}
return 0;
err_stop_hw:
del_timer_sync(&msc->battery_timer);
hid_hw_stop(hdev);
return ret;
}
static void magicmouse_remove(struct hid_device *hdev)
{
struct magicmouse_sc *msc = hid_get_drvdata(hdev);
if (msc) {
cancel_delayed_work_sync(&msc->work);
del_timer_sync(&msc->battery_timer);
}
hid_hw_stop(hdev);
}
static __u8 *magicmouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
/*
* Change the usage from:
* 0x06, 0x00, 0xff, // Usage Page (Vendor Defined Page 1) 0
* 0x09, 0x0b, // Usage (Vendor Usage 0x0b) 3
* To:
* 0x05, 0x01, // Usage Page (Generic Desktop) 0
* 0x09, 0x02, // Usage (Mouse) 2
*/
if (hdev->vendor == USB_VENDOR_ID_APPLE &&
(hdev->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
hdev->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) &&
*rsize == 83 && rdesc[46] == 0x84 && rdesc[58] == 0x85) {
hid_info(hdev,
"fixing up magicmouse battery report descriptor\n");
*rsize = *rsize - 1;
rdesc = kmemdup(rdesc + 1, *rsize, GFP_KERNEL);
if (!rdesc)
return NULL;
rdesc[0] = 0x05;
rdesc[1] = 0x01;
rdesc[2] = 0x09;
rdesc[3] = 0x02;
}
return rdesc;
}
static const struct hid_device_id magic_mice[] = {
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 },
{ HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 },
{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 },
{ HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 },
{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 },
{ }
};
MODULE_DEVICE_TABLE(hid, magic_mice);
static struct hid_driver magicmouse_driver = {
.name = "magicmouse",
.id_table = magic_mice,
.probe = magicmouse_probe,
.remove = magicmouse_remove,
.report_fixup = magicmouse_report_fixup,
.raw_event = magicmouse_raw_event,
.event = magicmouse_event,
.input_mapping = magicmouse_input_mapping,
.input_configured = magicmouse_input_configured,
};
module_hid_driver(magicmouse_driver);
MODULE_LICENSE("GPL");