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linux/drivers/hid/wacom_sys.c
Jason Gerecke c1d6708bf0 HID: wacom: Do not register input devices until after hid_hw_start 
If a input device is opened before hid_hw_start is called, events may
not be received from the hardware. In the case of USB-backed devices,
for example, the hid_hw_start function is responsible for filling in
the URB which is submitted when the input device is opened. If a device
is opened prematurely, polling will never start because the device will
not have been in the correct state to send the URB.

Because the wacom driver registers its input devices before calling
hid_hw_start, there is a window of time where a device can be opened
and end up in an inoperable state. Some ARM-based Chromebooks in particular
reliably trigger this bug.

This commit splits the wacom_register_inputs function into two pieces.
One which is responsible for setting up the allocated inputs (and runs
prior to hid_hw_start so that devices are ready for any input events
they may end up receiving) and another which only registers the devices
(and runs after hid_hw_start to ensure devices can be immediately opened
without issue). Note that the functions to initialize the LEDs and remotes
are also moved after hid_hw_start to maintain their own dependency chains.

Fixes: 7704ac9373 ("HID: wacom: implement generic HID handling for pen generic devices")
Cc: stable@vger.kernel.org # v3.18+
Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Tested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
2024-02-06 16:12:07 +01:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* USB Wacom tablet support - system specific code
*/
#include "wacom_wac.h"
#include "wacom.h"
#include <linux/input/mt.h>
#define WAC_MSG_RETRIES 5
#define WAC_CMD_RETRIES 10
#define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
#define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
#define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
size_t size, unsigned int retries)
{
int retval;
do {
retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
HID_REQ_GET_REPORT);
} while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
if (retval < 0)
hid_err(hdev, "wacom_get_report: ran out of retries "
"(last error = %d)\n", retval);
return retval;
}
static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
size_t size, unsigned int retries)
{
int retval;
do {
retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
HID_REQ_SET_REPORT);
} while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
if (retval < 0)
hid_err(hdev, "wacom_set_report: ran out of retries "
"(last error = %d)\n", retval);
return retval;
}
static void wacom_wac_queue_insert(struct hid_device *hdev,
struct kfifo_rec_ptr_2 *fifo,
u8 *raw_data, int size)
{
bool warned = false;
while (kfifo_avail(fifo) < size) {
if (!warned)
hid_warn(hdev, "%s: kfifo has filled, starting to drop events\n", __func__);
warned = true;
kfifo_skip(fifo);
}
kfifo_in(fifo, raw_data, size);
}
static void wacom_wac_queue_flush(struct hid_device *hdev,
struct kfifo_rec_ptr_2 *fifo)
{
while (!kfifo_is_empty(fifo)) {
u8 buf[WACOM_PKGLEN_MAX];
int size;
int err;
size = kfifo_out(fifo, buf, sizeof(buf));
err = hid_report_raw_event(hdev, HID_INPUT_REPORT, buf, size, false);
if (err) {
hid_warn(hdev, "%s: unable to flush event due to error %d\n",
__func__, err);
}
}
}
static int wacom_wac_pen_serial_enforce(struct hid_device *hdev,
struct hid_report *report, u8 *raw_data, int report_size)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
struct wacom_features *features = &wacom_wac->features;
bool flush = false;
bool insert = false;
int i, j;
if (wacom_wac->serial[0] || !(features->quirks & WACOM_QUIRK_TOOLSERIAL))
return 0;
/* Queue events which have invalid tool type or serial number */
for (i = 0; i < report->maxfield; i++) {
for (j = 0; j < report->field[i]->maxusage; j++) {
struct hid_field *field = report->field[i];
struct hid_usage *usage = &field->usage[j];
unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
unsigned int offset;
unsigned int size;
unsigned int value;
if (equivalent_usage != HID_DG_INRANGE &&
equivalent_usage != HID_DG_TOOLSERIALNUMBER &&
equivalent_usage != WACOM_HID_WD_SERIALHI &&
equivalent_usage != WACOM_HID_WD_TOOLTYPE)
continue;
offset = field->report_offset;
size = field->report_size;
value = hid_field_extract(hdev, raw_data+1, offset + j * size, size);
/* If we go out of range, we need to flush the queue ASAP */
if (equivalent_usage == HID_DG_INRANGE)
value = !value;
if (value) {
flush = true;
switch (equivalent_usage) {
case HID_DG_TOOLSERIALNUMBER:
wacom_wac->serial[0] = value;
break;
case WACOM_HID_WD_SERIALHI:
wacom_wac->serial[0] |= ((__u64)value) << 32;
break;
case WACOM_HID_WD_TOOLTYPE:
wacom_wac->id[0] = value;
break;
}
}
else {
insert = true;
}
}
}
if (flush)
wacom_wac_queue_flush(hdev, wacom_wac->pen_fifo);
else if (insert)
wacom_wac_queue_insert(hdev, wacom_wac->pen_fifo,
raw_data, report_size);
return insert && !flush;
}
static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
u8 *raw_data, int size)
{
struct wacom *wacom = hid_get_drvdata(hdev);
if (wacom->wacom_wac.features.type == BOOTLOADER)
return 0;
if (size > WACOM_PKGLEN_MAX)
return 1;
if (wacom_wac_pen_serial_enforce(hdev, report, raw_data, size))
return -1;
memcpy(wacom->wacom_wac.data, raw_data, size);
wacom_wac_irq(&wacom->wacom_wac, size);
return 0;
}
static int wacom_open(struct input_dev *dev)
{
struct wacom *wacom = input_get_drvdata(dev);
return hid_hw_open(wacom->hdev);
}
static void wacom_close(struct input_dev *dev)
{
struct wacom *wacom = input_get_drvdata(dev);
/*
* wacom->hdev should never be null, but surprisingly, I had the case
* once while unplugging the Wacom Wireless Receiver.
*/
if (wacom->hdev)
hid_hw_close(wacom->hdev);
}
/*
* Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
*/
static int wacom_calc_hid_res(int logical_extents, int physical_extents,
unsigned unit, int exponent)
{
struct hid_field field = {
.logical_maximum = logical_extents,
.physical_maximum = physical_extents,
.unit = unit,
.unit_exponent = exponent,
};
return hidinput_calc_abs_res(&field, ABS_X);
}
static void wacom_hid_usage_quirk(struct hid_device *hdev,
struct hid_field *field, struct hid_usage *usage)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_features *features = &wacom->wacom_wac.features;
unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
/*
* The Dell Canvas 27 needs to be switched to its vendor-defined
* report to provide the best resolution.
*/
if (hdev->vendor == USB_VENDOR_ID_WACOM &&
hdev->product == 0x4200 &&
field->application == HID_UP_MSVENDOR) {
wacom->wacom_wac.mode_report = field->report->id;
wacom->wacom_wac.mode_value = 2;
}
/*
* ISDv4 devices which predate HID's adoption of the
* HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
* position instead. We can accurately detect if a
* usage with that value should be HID_DG_BARRELSWITCH2
* based on the surrounding usages, which have remained
* constant across generations.
*/
if (features->type == HID_GENERIC &&
usage->hid == 0x000D0000 &&
field->application == HID_DG_PEN &&
field->physical == HID_DG_STYLUS) {
int i = usage->usage_index;
if (i-4 >= 0 && i+1 < field->maxusage &&
field->usage[i-4].hid == HID_DG_TIPSWITCH &&
field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
field->usage[i-2].hid == HID_DG_ERASER &&
field->usage[i-1].hid == HID_DG_INVERT &&
field->usage[i+1].hid == HID_DG_INRANGE) {
usage->hid = HID_DG_BARRELSWITCH2;
}
}
/*
* Wacom's AES devices use different vendor-defined usages to
* report serial number information compared to their branded
* hardware. The usages are also sometimes ill-defined and do
* not have the correct logical min/max values set. Lets patch
* the descriptor to use the branded usage convention and fix
* the errors.
*/
if (usage->hid == WACOM_HID_WT_SERIALNUMBER &&
field->report_size == 16 &&
field->index + 2 < field->report->maxfield) {
struct hid_field *a = field->report->field[field->index + 1];
struct hid_field *b = field->report->field[field->index + 2];
if (a->maxusage > 0 &&
a->usage[0].hid == HID_DG_TOOLSERIALNUMBER &&
a->report_size == 32 &&
b->maxusage > 0 &&
b->usage[0].hid == 0xFF000000 &&
b->report_size == 8) {
features->quirks |= WACOM_QUIRK_AESPEN;
usage->hid = WACOM_HID_WD_TOOLTYPE;
field->logical_minimum = S16_MIN;
field->logical_maximum = S16_MAX;
a->logical_minimum = S32_MIN;
a->logical_maximum = S32_MAX;
b->usage[0].hid = WACOM_HID_WD_SERIALHI;
b->logical_minimum = 0;
b->logical_maximum = U8_MAX;
}
}
/* 2nd-generation Intuos Pro Large has incorrect Y maximum */
if (hdev->vendor == USB_VENDOR_ID_WACOM &&
hdev->product == 0x0358 &&
WACOM_PEN_FIELD(field) &&
equivalent_usage == HID_GD_Y) {
field->logical_maximum = 43200;
}
}
static void wacom_feature_mapping(struct hid_device *hdev,
struct hid_field *field, struct hid_usage *usage)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_features *features = &wacom->wacom_wac.features;
struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
u8 *data;
int ret;
u32 n;
wacom_hid_usage_quirk(hdev, field, usage);
switch (equivalent_usage) {
case WACOM_HID_WD_TOUCH_RING_SETTING:
wacom->generic_has_leds = true;
break;
case HID_DG_CONTACTMAX:
/* leave touch_max as is if predefined */
if (!features->touch_max) {
/* read manually */
n = hid_report_len(field->report);
data = hid_alloc_report_buf(field->report, GFP_KERNEL);
if (!data)
break;
data[0] = field->report->id;
ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
data, n, WAC_CMD_RETRIES);
if (ret == n && features->type == HID_GENERIC) {
ret = hid_report_raw_event(hdev,
HID_FEATURE_REPORT, data, n, 0);
} else if (ret == 2 && features->type != HID_GENERIC) {
features->touch_max = data[1];
} else {
features->touch_max = 16;
hid_warn(hdev, "wacom_feature_mapping: "
"could not get HID_DG_CONTACTMAX, "
"defaulting to %d\n",
features->touch_max);
}
kfree(data);
}
break;
case HID_DG_INPUTMODE:
/* Ignore if value index is out of bounds. */
if (usage->usage_index >= field->report_count) {
dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
break;
}
hid_data->inputmode = field->report->id;
hid_data->inputmode_index = usage->usage_index;
break;
case HID_UP_DIGITIZER:
if (field->report->id == 0x0B &&
(field->application == WACOM_HID_G9_PEN ||
field->application == WACOM_HID_G11_PEN)) {
wacom->wacom_wac.mode_report = field->report->id;
wacom->wacom_wac.mode_value = 0;
}
break;
case WACOM_HID_WD_DATAMODE:
wacom->wacom_wac.mode_report = field->report->id;
wacom->wacom_wac.mode_value = 2;
break;
case WACOM_HID_UP_G9:
case WACOM_HID_UP_G11:
if (field->report->id == 0x03 &&
(field->application == WACOM_HID_G9_TOUCHSCREEN ||
field->application == WACOM_HID_G11_TOUCHSCREEN)) {
wacom->wacom_wac.mode_report = field->report->id;
wacom->wacom_wac.mode_value = 0;
}
break;
case WACOM_HID_WD_OFFSETLEFT:
case WACOM_HID_WD_OFFSETTOP:
case WACOM_HID_WD_OFFSETRIGHT:
case WACOM_HID_WD_OFFSETBOTTOM:
/* read manually */
n = hid_report_len(field->report);
data = hid_alloc_report_buf(field->report, GFP_KERNEL);
if (!data)
break;
data[0] = field->report->id;
ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
data, n, WAC_CMD_RETRIES);
if (ret == n) {
ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
data, n, 0);
} else {
hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
__func__);
}
kfree(data);
break;
}
}
/*
* Interface Descriptor of wacom devices can be incomplete and
* inconsistent so wacom_features table is used to store stylus
* device's packet lengths, various maximum values, and tablet
* resolution based on product ID's.
*
* For devices that contain 2 interfaces, wacom_features table is
* inaccurate for the touch interface. Since the Interface Descriptor
* for touch interfaces has pretty complete data, this function exists
* to query tablet for this missing information instead of hard coding in
* an additional table.
*
* A typical Interface Descriptor for a stylus will contain a
* boot mouse application collection that is not of interest and this
* function will ignore it.
*
* It also contains a digitizer application collection that also is not
* of interest since any information it contains would be duplicate
* of what is in wacom_features. Usually it defines a report of an array
* of bytes that could be used as max length of the stylus packet returned.
* If it happens to define a Digitizer-Stylus Physical Collection then
* the X and Y logical values contain valid data but it is ignored.
*
* A typical Interface Descriptor for a touch interface will contain a
* Digitizer-Finger Physical Collection which will define both logical
* X/Y maximum as well as the physical size of tablet. Since touch
* interfaces haven't supported pressure or distance, this is enough
* information to override invalid values in the wacom_features table.
*
* Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
* data. We deal with them after returning from this function.
*/
static void wacom_usage_mapping(struct hid_device *hdev,
struct hid_field *field, struct hid_usage *usage)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_features *features = &wacom->wacom_wac.features;
bool finger = WACOM_FINGER_FIELD(field);
bool pen = WACOM_PEN_FIELD(field);
unsigned equivalent_usage = wacom_equivalent_usage(usage->hid);
/*
* Requiring Stylus Usage will ignore boot mouse
* X/Y values and some cases of invalid Digitizer X/Y
* values commonly reported.
*/
if (pen)
features->device_type |= WACOM_DEVICETYPE_PEN;
else if (finger)
features->device_type |= WACOM_DEVICETYPE_TOUCH;
else
return;
wacom_hid_usage_quirk(hdev, field, usage);
switch (equivalent_usage) {
case HID_GD_X:
features->x_max = field->logical_maximum;
if (finger) {
features->x_phy = field->physical_maximum;
if ((features->type != BAMBOO_PT) &&
(features->type != BAMBOO_TOUCH)) {
features->unit = field->unit;
features->unitExpo = field->unit_exponent;
}
}
break;
case HID_GD_Y:
features->y_max = field->logical_maximum;
if (finger) {
features->y_phy = field->physical_maximum;
if ((features->type != BAMBOO_PT) &&
(features->type != BAMBOO_TOUCH)) {
features->unit = field->unit;
features->unitExpo = field->unit_exponent;
}
}
break;
case HID_DG_TIPPRESSURE:
if (pen)
features->pressure_max = field->logical_maximum;
break;
}
if (features->type == HID_GENERIC)
wacom_wac_usage_mapping(hdev, field, usage);
}
static void wacom_post_parse_hid(struct hid_device *hdev,
struct wacom_features *features)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
if (features->type == HID_GENERIC) {
/* Any last-minute generic device setup */
if (wacom_wac->has_mode_change) {
if (wacom_wac->is_direct_mode)
features->device_type |= WACOM_DEVICETYPE_DIRECT;
else
features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
}
if (features->touch_max > 1) {
if (features->device_type & WACOM_DEVICETYPE_DIRECT)
input_mt_init_slots(wacom_wac->touch_input,
wacom_wac->features.touch_max,
INPUT_MT_DIRECT);
else
input_mt_init_slots(wacom_wac->touch_input,
wacom_wac->features.touch_max,
INPUT_MT_POINTER);
}
}
}
static void wacom_parse_hid(struct hid_device *hdev,
struct wacom_features *features)
{
struct hid_report_enum *rep_enum;
struct hid_report *hreport;
int i, j;
/* check features first */
rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
list_for_each_entry(hreport, &rep_enum->report_list, list) {
for (i = 0; i < hreport->maxfield; i++) {
/* Ignore if report count is out of bounds. */
if (hreport->field[i]->report_count < 1)
continue;
for (j = 0; j < hreport->field[i]->maxusage; j++) {
wacom_feature_mapping(hdev, hreport->field[i],
hreport->field[i]->usage + j);
}
}
}
/* now check the input usages */
rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
list_for_each_entry(hreport, &rep_enum->report_list, list) {
if (!hreport->maxfield)
continue;
for (i = 0; i < hreport->maxfield; i++)
for (j = 0; j < hreport->field[i]->maxusage; j++)
wacom_usage_mapping(hdev, hreport->field[i],
hreport->field[i]->usage + j);
}
wacom_post_parse_hid(hdev, features);
}
static int wacom_hid_set_device_mode(struct hid_device *hdev)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
struct hid_report *r;
struct hid_report_enum *re;
if (hid_data->inputmode < 0)
return 0;
re = &(hdev->report_enum[HID_FEATURE_REPORT]);
r = re->report_id_hash[hid_data->inputmode];
if (r) {
r->field[0]->value[hid_data->inputmode_index] = 2;
hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
}
return 0;
}
static int wacom_set_device_mode(struct hid_device *hdev,
struct wacom_wac *wacom_wac)
{
u8 *rep_data;
struct hid_report *r;
struct hid_report_enum *re;
u32 length;
int error = -ENOMEM, limit = 0;
if (wacom_wac->mode_report < 0)
return 0;
re = &(hdev->report_enum[HID_FEATURE_REPORT]);
r = re->report_id_hash[wacom_wac->mode_report];
if (!r)
return -EINVAL;
rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
if (!rep_data)
return -ENOMEM;
length = hid_report_len(r);
do {
rep_data[0] = wacom_wac->mode_report;
rep_data[1] = wacom_wac->mode_value;
error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
length, 1);
if (error >= 0)
error = wacom_get_report(hdev, HID_FEATURE_REPORT,
rep_data, length, 1);
} while (error >= 0 &&
rep_data[1] != wacom_wac->mode_report &&
limit++ < WAC_MSG_RETRIES);
kfree(rep_data);
return error < 0 ? error : 0;
}
static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
struct wacom_features *features)
{
struct wacom *wacom = hid_get_drvdata(hdev);
int ret;
u8 rep_data[2];
switch (features->type) {
case GRAPHIRE_BT:
rep_data[0] = 0x03;
rep_data[1] = 0x00;
ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
3);
if (ret >= 0) {
rep_data[0] = speed == 0 ? 0x05 : 0x06;
rep_data[1] = 0x00;
ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
rep_data, 2, 3);
if (ret >= 0) {
wacom->wacom_wac.bt_high_speed = speed;
return 0;
}
}
/*
* Note that if the raw queries fail, it's not a hard failure
* and it is safe to continue
*/
hid_warn(hdev, "failed to poke device, command %d, err %d\n",
rep_data[0], ret);
break;
case INTUOS4WL:
if (speed == 1)
wacom->wacom_wac.bt_features &= ~0x20;
else
wacom->wacom_wac.bt_features |= 0x20;
rep_data[0] = 0x03;
rep_data[1] = wacom->wacom_wac.bt_features;
ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
1);
if (ret >= 0)
wacom->wacom_wac.bt_high_speed = speed;
break;
}
return 0;
}
/*
* Switch the tablet into its most-capable mode. Wacom tablets are
* typically configured to power-up in a mode which sends mouse-like
* reports to the OS. To get absolute position, pressure data, etc.
* from the tablet, it is necessary to switch the tablet out of this
* mode and into one which sends the full range of tablet data.
*/
static int _wacom_query_tablet_data(struct wacom *wacom)
{
struct hid_device *hdev = wacom->hdev;
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
struct wacom_features *features = &wacom_wac->features;
if (hdev->bus == BUS_BLUETOOTH)
return wacom_bt_query_tablet_data(hdev, 1, features);
if (features->type != HID_GENERIC) {
if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
if (features->type > TABLETPC) {
/* MT Tablet PC touch */
wacom_wac->mode_report = 3;
wacom_wac->mode_value = 4;
} else if (features->type == WACOM_24HDT) {
wacom_wac->mode_report = 18;
wacom_wac->mode_value = 2;
} else if (features->type == WACOM_27QHDT) {
wacom_wac->mode_report = 131;
wacom_wac->mode_value = 2;
} else if (features->type == BAMBOO_PAD) {
wacom_wac->mode_report = 2;
wacom_wac->mode_value = 2;
}
} else if (features->device_type & WACOM_DEVICETYPE_PEN) {
if (features->type <= BAMBOO_PT) {
wacom_wac->mode_report = 2;
wacom_wac->mode_value = 2;
}
}
}
wacom_set_device_mode(hdev, wacom_wac);
if (features->type == HID_GENERIC)
return wacom_hid_set_device_mode(hdev);
return 0;
}
static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
struct wacom_features *features)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct usb_interface *intf = wacom->intf;
/* default features */
features->x_fuzz = 4;
features->y_fuzz = 4;
features->pressure_fuzz = 0;
features->distance_fuzz = 1;
features->tilt_fuzz = 1;
/*
* The wireless device HID is basic and layout conflicts with
* other tablets (monitor and touch interface can look like pen).
* Skip the query for this type and modify defaults based on
* interface number.
*/
if (features->type == WIRELESS && intf) {
if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
else
features->device_type = WACOM_DEVICETYPE_NONE;
return;
}
wacom_parse_hid(hdev, features);
}
struct wacom_hdev_data {
struct list_head list;
struct kref kref;
struct hid_device *dev;
struct wacom_shared shared;
};
static LIST_HEAD(wacom_udev_list);
static DEFINE_MUTEX(wacom_udev_list_lock);
static bool wacom_are_sibling(struct hid_device *hdev,
struct hid_device *sibling)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_features *features = &wacom->wacom_wac.features;
struct wacom *sibling_wacom = hid_get_drvdata(sibling);
struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
__u32 oVid = features->oVid ? features->oVid : hdev->vendor;
__u32 oPid = features->oPid ? features->oPid : hdev->product;
/* The defined oVid/oPid must match that of the sibling */
if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
return false;
if (features->oPid != HID_ANY_ID && sibling->product != oPid)
return false;
/*
* Devices with the same VID/PID must share the same physical
* device path, while those with different VID/PID must share
* the same physical parent device path.
*/
if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
if (!hid_compare_device_paths(hdev, sibling, '/'))
return false;
} else {
if (!hid_compare_device_paths(hdev, sibling, '.'))
return false;
}
/* Skip the remaining heuristics unless you are a HID_GENERIC device */
if (features->type != HID_GENERIC)
return true;
/*
* Direct-input devices may not be siblings of indirect-input
* devices.
*/
if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
!(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
return false;
/*
* Indirect-input devices may not be siblings of direct-input
* devices.
*/
if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
return false;
/* Pen devices may only be siblings of touch devices */
if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
!(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
return false;
/* Touch devices may only be siblings of pen devices */
if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
!(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
return false;
/*
* No reason could be found for these two devices to NOT be
* siblings, so there's a good chance they ARE siblings
*/
return true;
}
static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
{
struct wacom_hdev_data *data;
/* Try to find an already-probed interface from the same device */
list_for_each_entry(data, &wacom_udev_list, list) {
if (hid_compare_device_paths(hdev, data->dev, '/')) {
kref_get(&data->kref);
return data;
}
}
/* Fallback to finding devices that appear to be "siblings" */
list_for_each_entry(data, &wacom_udev_list, list) {
if (wacom_are_sibling(hdev, data->dev)) {
kref_get(&data->kref);
return data;
}
}
return NULL;
}
static void wacom_release_shared_data(struct kref *kref)
{
struct wacom_hdev_data *data =
container_of(kref, struct wacom_hdev_data, kref);
mutex_lock(&wacom_udev_list_lock);
list_del(&data->list);
mutex_unlock(&wacom_udev_list_lock);
kfree(data);
}
static void wacom_remove_shared_data(void *res)
{
struct wacom *wacom = res;
struct wacom_hdev_data *data;
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
if (wacom_wac->shared) {
data = container_of(wacom_wac->shared, struct wacom_hdev_data,
shared);
if (wacom_wac->shared->touch == wacom->hdev)
wacom_wac->shared->touch = NULL;
else if (wacom_wac->shared->pen == wacom->hdev)
wacom_wac->shared->pen = NULL;
kref_put(&data->kref, wacom_release_shared_data);
wacom_wac->shared = NULL;
}
}
static int wacom_add_shared_data(struct hid_device *hdev)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
struct wacom_hdev_data *data;
int retval = 0;
mutex_lock(&wacom_udev_list_lock);
data = wacom_get_hdev_data(hdev);
if (!data) {
data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
if (!data) {
mutex_unlock(&wacom_udev_list_lock);
return -ENOMEM;
}
kref_init(&data->kref);
data->dev = hdev;
list_add_tail(&data->list, &wacom_udev_list);
}
mutex_unlock(&wacom_udev_list_lock);
wacom_wac->shared = &data->shared;
retval = devm_add_action_or_reset(&hdev->dev, wacom_remove_shared_data, wacom);
if (retval)
return retval;
if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
wacom_wac->shared->touch = hdev;
else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
wacom_wac->shared->pen = hdev;
return retval;
}
static int wacom_led_control(struct wacom *wacom)
{
unsigned char *buf;
int retval;
unsigned char report_id = WAC_CMD_LED_CONTROL;
int buf_size = 9;
if (!wacom->led.groups)
return -ENOTSUPP;
if (wacom->wacom_wac.features.type == REMOTE)
return -ENOTSUPP;
if (wacom->wacom_wac.pid) { /* wireless connected */
report_id = WAC_CMD_WL_LED_CONTROL;
buf_size = 13;
}
else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
report_id = WAC_CMD_WL_INTUOSP2;
buf_size = 51;
}
buf = kzalloc(buf_size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (wacom->wacom_wac.features.type == HID_GENERIC) {
buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
buf[1] = wacom->led.llv;
buf[2] = wacom->led.groups[0].select & 0x03;
} else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
wacom->wacom_wac.features.type <= INTUOSPL)) {
/*
* Touch Ring and crop mark LED luminance may take on
* one of four values:
* 0 = Low; 1 = Medium; 2 = High; 3 = Off
*/
int ring_led = wacom->led.groups[0].select & 0x03;
int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
int crop_lum = 0;
unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
buf[0] = report_id;
if (wacom->wacom_wac.pid) {
wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
buf, buf_size, WAC_CMD_RETRIES);
buf[0] = report_id;
buf[4] = led_bits;
} else
buf[1] = led_bits;
}
else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
buf[0] = report_id;
buf[4] = 100; // Power Connection LED (ORANGE)
buf[5] = 100; // BT Connection LED (BLUE)
buf[6] = 100; // Paper Mode (RED?)
buf[7] = 100; // Paper Mode (GREEN?)
buf[8] = 100; // Paper Mode (BLUE?)
buf[9] = wacom->led.llv;
buf[10] = wacom->led.groups[0].select & 0x03;
}
else {
int led = wacom->led.groups[0].select | 0x4;
if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
wacom->wacom_wac.features.type == WACOM_24HD)
led |= (wacom->led.groups[1].select << 4) | 0x40;
buf[0] = report_id;
buf[1] = led;
buf[2] = wacom->led.llv;
buf[3] = wacom->led.hlv;
buf[4] = wacom->led.img_lum;
}
retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
WAC_CMD_RETRIES);
kfree(buf);
return retval;
}
static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
const unsigned len, const void *img)
{
unsigned char *buf;
int i, retval;
const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
if (!buf)
return -ENOMEM;
/* Send 'start' command */
buf[0] = WAC_CMD_ICON_START;
buf[1] = 1;
retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
WAC_CMD_RETRIES);
if (retval < 0)
goto out;
buf[0] = xfer_id;
buf[1] = button_id & 0x07;
for (i = 0; i < 4; i++) {
buf[2] = i;
memcpy(buf + 3, img + i * chunk_len, chunk_len);
retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
buf, chunk_len + 3, WAC_CMD_RETRIES);
if (retval < 0)
break;
}
/* Send 'stop' */
buf[0] = WAC_CMD_ICON_START;
buf[1] = 0;
wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
WAC_CMD_RETRIES);
out:
kfree(buf);
return retval;
}
static ssize_t wacom_led_select_store(struct device *dev, int set_id,
const char *buf, size_t count)
{
struct hid_device *hdev = to_hid_device(dev);
struct wacom *wacom = hid_get_drvdata(hdev);
unsigned int id;
int err;
err = kstrtouint(buf, 10, &id);
if (err)
return err;
mutex_lock(&wacom->lock);
wacom->led.groups[set_id].select = id & 0x3;
err = wacom_led_control(wacom);
mutex_unlock(&wacom->lock);
return err < 0 ? err : count;
}
#define DEVICE_LED_SELECT_ATTR(SET_ID) \
static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
struct device_attribute *attr, const char *buf, size_t count) \
{ \
return wacom_led_select_store(dev, SET_ID, buf, count); \
} \
static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct hid_device *hdev = to_hid_device(dev);\
struct wacom *wacom = hid_get_drvdata(hdev); \
return scnprintf(buf, PAGE_SIZE, "%d\n", \
wacom->led.groups[SET_ID].select); \
} \
static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \
wacom_led##SET_ID##_select_show, \
wacom_led##SET_ID##_select_store)
DEVICE_LED_SELECT_ATTR(0);
DEVICE_LED_SELECT_ATTR(1);
static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
const char *buf, size_t count)
{
unsigned int value;
int err;
err = kstrtouint(buf, 10, &value);
if (err)
return err;
mutex_lock(&wacom->lock);
*dest = value & 0x7f;
err = wacom_led_control(wacom);
mutex_unlock(&wacom->lock);
return err < 0 ? err : count;
}
#define DEVICE_LUMINANCE_ATTR(name, field) \
static ssize_t wacom_##name##_luminance_store(struct device *dev, \
struct device_attribute *attr, const char *buf, size_t count) \
{ \
struct hid_device *hdev = to_hid_device(dev);\
struct wacom *wacom = hid_get_drvdata(hdev); \
\
return wacom_luminance_store(wacom, &wacom->led.field, \
buf, count); \
} \
static ssize_t wacom_##name##_luminance_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct wacom *wacom = dev_get_drvdata(dev); \
return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \
} \
static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \
wacom_##name##_luminance_show, \
wacom_##name##_luminance_store)
DEVICE_LUMINANCE_ATTR(status0, llv);
DEVICE_LUMINANCE_ATTR(status1, hlv);
DEVICE_LUMINANCE_ATTR(buttons, img_lum);
static ssize_t wacom_button_image_store(struct device *dev, int button_id,
const char *buf, size_t count)
{
struct hid_device *hdev = to_hid_device(dev);
struct wacom *wacom = hid_get_drvdata(hdev);
int err;
unsigned len;
u8 xfer_id;
if (hdev->bus == BUS_BLUETOOTH) {
len = 256;
xfer_id = WAC_CMD_ICON_BT_XFER;
} else {
len = 1024;
xfer_id = WAC_CMD_ICON_XFER;
}
if (count != len)
return -EINVAL;
mutex_lock(&wacom->lock);
err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
mutex_unlock(&wacom->lock);
return err < 0 ? err : count;
}
#define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
struct device_attribute *attr, const char *buf, size_t count) \
{ \
return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
} \
static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \
NULL, wacom_btnimg##BUTTON_ID##_store)
DEVICE_BTNIMG_ATTR(0);
DEVICE_BTNIMG_ATTR(1);
DEVICE_BTNIMG_ATTR(2);
DEVICE_BTNIMG_ATTR(3);
DEVICE_BTNIMG_ATTR(4);
DEVICE_BTNIMG_ATTR(5);
DEVICE_BTNIMG_ATTR(6);
DEVICE_BTNIMG_ATTR(7);
static struct attribute *cintiq_led_attrs[] = {
&dev_attr_status_led0_select.attr,
&dev_attr_status_led1_select.attr,
NULL
};
static const struct attribute_group cintiq_led_attr_group = {
.name = "wacom_led",
.attrs = cintiq_led_attrs,
};
static struct attribute *intuos4_led_attrs[] = {
&dev_attr_status0_luminance.attr,
&dev_attr_status1_luminance.attr,
&dev_attr_status_led0_select.attr,
&dev_attr_buttons_luminance.attr,
&dev_attr_button0_rawimg.attr,
&dev_attr_button1_rawimg.attr,
&dev_attr_button2_rawimg.attr,
&dev_attr_button3_rawimg.attr,
&dev_attr_button4_rawimg.attr,
&dev_attr_button5_rawimg.attr,
&dev_attr_button6_rawimg.attr,
&dev_attr_button7_rawimg.attr,
NULL
};
static const struct attribute_group intuos4_led_attr_group = {
.name = "wacom_led",
.attrs = intuos4_led_attrs,
};
static struct attribute *intuos5_led_attrs[] = {
&dev_attr_status0_luminance.attr,
&dev_attr_status_led0_select.attr,
NULL
};
static const struct attribute_group intuos5_led_attr_group = {
.name = "wacom_led",
.attrs = intuos5_led_attrs,
};
static struct attribute *generic_led_attrs[] = {
&dev_attr_status0_luminance.attr,
&dev_attr_status_led0_select.attr,
NULL
};
static const struct attribute_group generic_led_attr_group = {
.name = "wacom_led",
.attrs = generic_led_attrs,
};
struct wacom_sysfs_group_devres {
const struct attribute_group *group;
struct kobject *root;
};
static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
{
struct wacom_sysfs_group_devres *devres = res;
struct kobject *kobj = devres->root;
dev_dbg(dev, "%s: dropping reference to %s\n",
__func__, devres->group->name);
sysfs_remove_group(kobj, devres->group);
}
static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
struct kobject *root,
const struct attribute_group *group)
{
struct wacom_sysfs_group_devres *devres;
int error;
devres = devres_alloc(wacom_devm_sysfs_group_release,
sizeof(struct wacom_sysfs_group_devres),
GFP_KERNEL);
if (!devres)
return -ENOMEM;
devres->group = group;
devres->root = root;
error = sysfs_create_group(devres->root, group);
if (error) {
devres_free(devres);
return error;
}
devres_add(&wacom->hdev->dev, devres);
return 0;
}
static int wacom_devm_sysfs_create_group(struct wacom *wacom,
const struct attribute_group *group)
{
return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
group);
}
static void wacom_devm_kfifo_release(struct device *dev, void *res)
{
struct kfifo_rec_ptr_2 *devres = res;
kfifo_free(devres);
}
static int wacom_devm_kfifo_alloc(struct wacom *wacom)
{
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
struct kfifo_rec_ptr_2 *pen_fifo;
int error;
pen_fifo = devres_alloc(wacom_devm_kfifo_release,
sizeof(struct kfifo_rec_ptr_2),
GFP_KERNEL);
if (!pen_fifo)
return -ENOMEM;
error = kfifo_alloc(pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL);
if (error) {
devres_free(pen_fifo);
return error;
}
devres_add(&wacom->hdev->dev, pen_fifo);
wacom_wac->pen_fifo = pen_fifo;
return 0;
}
enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
{
struct wacom *wacom = led->wacom;
if (wacom->led.max_hlv)
return led->hlv * LED_FULL / wacom->led.max_hlv;
if (wacom->led.max_llv)
return led->llv * LED_FULL / wacom->led.max_llv;
/* device doesn't support brightness tuning */
return LED_FULL;
}
static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
{
struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
struct wacom *wacom = led->wacom;
if (wacom->led.groups[led->group].select != led->id)
return LED_OFF;
return wacom_leds_brightness_get(led);
}
static int wacom_led_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
struct wacom *wacom = led->wacom;
int error;
mutex_lock(&wacom->lock);
if (!wacom->led.groups || (brightness == LED_OFF &&
wacom->led.groups[led->group].select != led->id)) {
error = 0;
goto out;
}
led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
wacom->led.groups[led->group].select = led->id;
error = wacom_led_control(wacom);
out:
mutex_unlock(&wacom->lock);
return error;
}
static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
}
static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
struct wacom_led *led, unsigned int group,
unsigned int id, bool read_only)
{
int error;
char *name;
name = devm_kasprintf(dev, GFP_KERNEL,
"%s::wacom-%d.%d",
dev_name(dev),
group,
id);
if (!name)
return -ENOMEM;
if (!read_only) {
led->trigger.name = name;
error = devm_led_trigger_register(dev, &led->trigger);
if (error) {
hid_err(wacom->hdev,
"failed to register LED trigger %s: %d\n",
led->cdev.name, error);
return error;
}
}
led->group = group;
led->id = id;
led->wacom = wacom;
led->llv = wacom->led.llv;
led->hlv = wacom->led.hlv;
led->cdev.name = name;
led->cdev.max_brightness = LED_FULL;
led->cdev.flags = LED_HW_PLUGGABLE;
led->cdev.brightness_get = __wacom_led_brightness_get;
if (!read_only) {
led->cdev.brightness_set_blocking = wacom_led_brightness_set;
led->cdev.default_trigger = led->cdev.name;
} else {
led->cdev.brightness_set = wacom_led_readonly_brightness_set;
}
error = devm_led_classdev_register(dev, &led->cdev);
if (error) {
hid_err(wacom->hdev,
"failed to register LED %s: %d\n",
led->cdev.name, error);
led->cdev.name = NULL;
return error;
}
return 0;
}
static void wacom_led_groups_release_one(void *data)
{
struct wacom_group_leds *group = data;
devres_release_group(group->dev, group);
}
static int wacom_led_groups_alloc_and_register_one(struct device *dev,
struct wacom *wacom,
int group_id, int count,
bool read_only)
{
struct wacom_led *leds;
int i, error;
if (group_id >= wacom->led.count || count <= 0)
return -EINVAL;
if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
return -ENOMEM;
leds = devm_kcalloc(dev, count, sizeof(struct wacom_led), GFP_KERNEL);
if (!leds) {
error = -ENOMEM;
goto err;
}
wacom->led.groups[group_id].leds = leds;
wacom->led.groups[group_id].count = count;
for (i = 0; i < count; i++) {
error = wacom_led_register_one(dev, wacom, &leds[i],
group_id, i, read_only);
if (error)
goto err;
}
wacom->led.groups[group_id].dev = dev;
devres_close_group(dev, &wacom->led.groups[group_id]);
/*
* There is a bug (?) in devm_led_classdev_register() in which its
* increments the refcount of the parent. If the parent is an input
* device, that means the ref count never reaches 0 when
* devm_input_device_release() gets called.
* This means that the LEDs are still there after disconnect.
* Manually force the release of the group so that the leds are released
* once we are done using them.
*/
error = devm_add_action_or_reset(&wacom->hdev->dev,
wacom_led_groups_release_one,
&wacom->led.groups[group_id]);
if (error)
return error;
return 0;
err:
devres_release_group(dev, &wacom->led.groups[group_id]);
return error;
}
struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
unsigned int id)
{
struct wacom_group_leds *group;
if (group_id >= wacom->led.count)
return NULL;
group = &wacom->led.groups[group_id];
if (!group->leds)
return NULL;
id %= group->count;
return &group->leds[id];
}
/*
* wacom_led_next: gives the next available led with a wacom trigger.
*
* returns the next available struct wacom_led which has its default trigger
* or the current one if none is available.
*/
struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
{
struct wacom_led *next_led;
int group, next;
if (!wacom || !cur)
return NULL;
group = cur->group;
next = cur->id;
do {
next_led = wacom_led_find(wacom, group, ++next);
if (!next_led || next_led == cur)
return next_led;
} while (next_led->cdev.trigger != &next_led->trigger);
return next_led;
}
static void wacom_led_groups_release(void *data)
{
struct wacom *wacom = data;
wacom->led.groups = NULL;
wacom->led.count = 0;
}
static int wacom_led_groups_allocate(struct wacom *wacom, int count)
{
struct device *dev = &wacom->hdev->dev;
struct wacom_group_leds *groups;
int error;
groups = devm_kcalloc(dev, count, sizeof(struct wacom_group_leds),
GFP_KERNEL);
if (!groups)
return -ENOMEM;
error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
if (error)
return error;
wacom->led.groups = groups;
wacom->led.count = count;
return 0;
}
static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
int led_per_group, bool read_only)
{
struct device *dev;
int i, error;
if (!wacom->wacom_wac.pad_input)
return -EINVAL;
dev = &wacom->wacom_wac.pad_input->dev;
error = wacom_led_groups_allocate(wacom, group_count);
if (error)
return error;
for (i = 0; i < group_count; i++) {
error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
led_per_group,
read_only);
if (error)
return error;
}
return 0;
}
int wacom_initialize_leds(struct wacom *wacom)
{
int error;
if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
return 0;
/* Initialize default values */
switch (wacom->wacom_wac.features.type) {
case HID_GENERIC:
if (!wacom->generic_has_leds)
return 0;
wacom->led.llv = 100;
wacom->led.max_llv = 100;
error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
if (error) {
hid_err(wacom->hdev,
"cannot create leds err: %d\n", error);
return error;
}
error = wacom_devm_sysfs_create_group(wacom,
&generic_led_attr_group);
break;
case INTUOS4S:
case INTUOS4:
case INTUOS4WL:
case INTUOS4L:
wacom->led.llv = 10;
wacom->led.hlv = 20;
wacom->led.max_llv = 127;
wacom->led.max_hlv = 127;
wacom->led.img_lum = 10;
error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
if (error) {
hid_err(wacom->hdev,
"cannot create leds err: %d\n", error);
return error;
}
error = wacom_devm_sysfs_create_group(wacom,
&intuos4_led_attr_group);
break;
case WACOM_24HD:
case WACOM_21UX2:
wacom->led.llv = 0;
wacom->led.hlv = 0;
wacom->led.img_lum = 0;
error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
if (error) {
hid_err(wacom->hdev,
"cannot create leds err: %d\n", error);
return error;
}
error = wacom_devm_sysfs_create_group(wacom,
&cintiq_led_attr_group);
break;
case INTUOS5S:
case INTUOS5:
case INTUOS5L:
case INTUOSPS:
case INTUOSPM:
case INTUOSPL:
wacom->led.llv = 32;
wacom->led.max_llv = 96;
error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
if (error) {
hid_err(wacom->hdev,
"cannot create leds err: %d\n", error);
return error;
}
error = wacom_devm_sysfs_create_group(wacom,
&intuos5_led_attr_group);
break;
case INTUOSP2_BT:
wacom->led.llv = 50;
wacom->led.max_llv = 100;
error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
if (error) {
hid_err(wacom->hdev,
"cannot create leds err: %d\n", error);
return error;
}
return 0;
case REMOTE:
wacom->led.llv = 255;
wacom->led.max_llv = 255;
error = wacom_led_groups_allocate(wacom, 5);
if (error) {
hid_err(wacom->hdev,
"cannot create leds err: %d\n", error);
return error;
}
return 0;
default:
return 0;
}
if (error) {
hid_err(wacom->hdev,
"cannot create sysfs group err: %d\n", error);
return error;
}
return 0;
}
static void wacom_init_work(struct work_struct *work)
{
struct wacom *wacom = container_of(work, struct wacom, init_work.work);
_wacom_query_tablet_data(wacom);
wacom_led_control(wacom);
}
static void wacom_query_tablet_data(struct wacom *wacom)
{
schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
}
static enum power_supply_property wacom_battery_props[] = {
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_CAPACITY
};
static int wacom_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct wacom_battery *battery = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = battery->wacom->wacom_wac.name;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = battery->bat_connected;
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_DEVICE;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = battery->battery_capacity;
break;
case POWER_SUPPLY_PROP_STATUS:
if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
val->intval = battery->bat_status;
else if (battery->bat_charging)
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else if (battery->battery_capacity == 100 &&
battery->ps_connected)
val->intval = POWER_SUPPLY_STATUS_FULL;
else if (battery->ps_connected)
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int __wacom_initialize_battery(struct wacom *wacom,
struct wacom_battery *battery)
{
static atomic_t battery_no = ATOMIC_INIT(0);
struct device *dev = &wacom->hdev->dev;
struct power_supply_config psy_cfg = { .drv_data = battery, };
struct power_supply *ps_bat;
struct power_supply_desc *bat_desc = &battery->bat_desc;
unsigned long n;
int error;
if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
return -ENOMEM;
battery->wacom = wacom;
n = atomic_inc_return(&battery_no) - 1;
bat_desc->properties = wacom_battery_props;
bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
bat_desc->get_property = wacom_battery_get_property;
sprintf(battery->bat_name, "wacom_battery_%ld", n);
bat_desc->name = battery->bat_name;
bat_desc->type = POWER_SUPPLY_TYPE_BATTERY;
bat_desc->use_for_apm = 0;
ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
if (IS_ERR(ps_bat)) {
error = PTR_ERR(ps_bat);
goto err;
}
power_supply_powers(ps_bat, &wacom->hdev->dev);
battery->battery = ps_bat;
devres_close_group(dev, bat_desc);
return 0;
err:
devres_release_group(dev, bat_desc);
return error;
}
static int wacom_initialize_battery(struct wacom *wacom)
{
if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
return __wacom_initialize_battery(wacom, &wacom->battery);
return 0;
}
static void wacom_destroy_battery(struct wacom *wacom)
{
if (wacom->battery.battery) {
devres_release_group(&wacom->hdev->dev,
&wacom->battery.bat_desc);
wacom->battery.battery = NULL;
}
}
static void wacom_aes_battery_handler(struct work_struct *work)
{
struct wacom *wacom = container_of(work, struct wacom, aes_battery_work.work);
wacom_destroy_battery(wacom);
}
static ssize_t wacom_show_speed(struct device *dev,
struct device_attribute
*attr, char *buf)
{
struct hid_device *hdev = to_hid_device(dev);
struct wacom *wacom = hid_get_drvdata(hdev);
return sysfs_emit(buf, "%i\n", wacom->wacom_wac.bt_high_speed);
}
static ssize_t wacom_store_speed(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct hid_device *hdev = to_hid_device(dev);
struct wacom *wacom = hid_get_drvdata(hdev);
u8 new_speed;
if (kstrtou8(buf, 0, &new_speed))
return -EINVAL;
if (new_speed != 0 && new_speed != 1)
return -EINVAL;
wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
return count;
}
static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
wacom_show_speed, wacom_store_speed);
static ssize_t wacom_show_remote_mode(struct kobject *kobj,
struct kobj_attribute *kattr,
char *buf, int index)
{
struct device *dev = kobj_to_dev(kobj->parent);
struct hid_device *hdev = to_hid_device(dev);
struct wacom *wacom = hid_get_drvdata(hdev);
u8 mode;
mode = wacom->led.groups[index].select;
return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
}
#define DEVICE_EKR_ATTR_GROUP(SET_ID) \
static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \
struct kobj_attribute *kattr, char *buf) \
{ \
return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \
} \
static struct kobj_attribute remote##SET_ID##_mode_attr = { \
.attr = {.name = "remote_mode", \
.mode = DEV_ATTR_RO_PERM}, \
.show = wacom_show_remote##SET_ID##_mode, \
}; \
static struct attribute *remote##SET_ID##_serial_attrs[] = { \
&remote##SET_ID##_mode_attr.attr, \
NULL \
}; \
static const struct attribute_group remote##SET_ID##_serial_group = { \
.name = NULL, \
.attrs = remote##SET_ID##_serial_attrs, \
}
DEVICE_EKR_ATTR_GROUP(0);
DEVICE_EKR_ATTR_GROUP(1);
DEVICE_EKR_ATTR_GROUP(2);
DEVICE_EKR_ATTR_GROUP(3);
DEVICE_EKR_ATTR_GROUP(4);
static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
int index)
{
int error = 0;
struct wacom_remote *remote = wacom->remote;
remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
GFP_KERNEL,
"%d", serial);
if (!remote->remotes[index].group.name)
return -ENOMEM;
error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
&remote->remotes[index].group);
if (error) {
remote->remotes[index].group.name = NULL;
hid_err(wacom->hdev,
"cannot create sysfs group err: %d\n", error);
return error;
}
return 0;
}
static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
{
const size_t buf_size = 2;
unsigned char *buf;
int retval;
buf = kzalloc(buf_size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
buf[0] = WAC_CMD_DELETE_PAIRING;
buf[1] = selector;
retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
buf_size, WAC_CMD_RETRIES);
kfree(buf);
return retval;
}
static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
unsigned char selector = 0;
struct device *dev = kobj_to_dev(kobj->parent);
struct hid_device *hdev = to_hid_device(dev);
struct wacom *wacom = hid_get_drvdata(hdev);
int err;
if (!strncmp(buf, "*\n", 2)) {
selector = WAC_CMD_UNPAIR_ALL;
} else {
hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
buf);
return -1;
}
mutex_lock(&wacom->lock);
err = wacom_cmd_unpair_remote(wacom, selector);
mutex_unlock(&wacom->lock);
return err < 0 ? err : count;
}
static struct kobj_attribute unpair_remote_attr = {
.attr = {.name = "unpair_remote", .mode = 0200},
.store = wacom_store_unpair_remote,
};
static const struct attribute *remote_unpair_attrs[] = {
&unpair_remote_attr.attr,
NULL
};
static void wacom_remotes_destroy(void *data)
{
struct wacom *wacom = data;
struct wacom_remote *remote = wacom->remote;
if (!remote)
return;
kobject_put(remote->remote_dir);
kfifo_free(&remote->remote_fifo);
wacom->remote = NULL;
}
static int wacom_initialize_remotes(struct wacom *wacom)
{
int error = 0;
struct wacom_remote *remote;
int i;
if (wacom->wacom_wac.features.type != REMOTE)
return 0;
remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
GFP_KERNEL);
if (!remote)
return -ENOMEM;
wacom->remote = remote;
spin_lock_init(&remote->remote_lock);
error = kfifo_alloc(&remote->remote_fifo,
5 * sizeof(struct wacom_remote_work_data),
GFP_KERNEL);
if (error) {
hid_err(wacom->hdev, "failed allocating remote_fifo\n");
return -ENOMEM;
}
remote->remotes[0].group = remote0_serial_group;
remote->remotes[1].group = remote1_serial_group;
remote->remotes[2].group = remote2_serial_group;
remote->remotes[3].group = remote3_serial_group;
remote->remotes[4].group = remote4_serial_group;
remote->remote_dir = kobject_create_and_add("wacom_remote",
&wacom->hdev->dev.kobj);
if (!remote->remote_dir)
return -ENOMEM;
error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
if (error) {
hid_err(wacom->hdev,
"cannot create sysfs group err: %d\n", error);
return error;
}
for (i = 0; i < WACOM_MAX_REMOTES; i++) {
wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
remote->remotes[i].serial = 0;
}
error = devm_add_action_or_reset(&wacom->hdev->dev,
wacom_remotes_destroy, wacom);
if (error)
return error;
return 0;
}
static struct input_dev *wacom_allocate_input(struct wacom *wacom)
{
struct input_dev *input_dev;
struct hid_device *hdev = wacom->hdev;
struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
input_dev = devm_input_allocate_device(&hdev->dev);
if (!input_dev)
return NULL;
input_dev->name = wacom_wac->features.name;
input_dev->phys = hdev->phys;
input_dev->dev.parent = &hdev->dev;
input_dev->open = wacom_open;
input_dev->close = wacom_close;
input_dev->uniq = hdev->uniq;
input_dev->id.bustype = hdev->bus;
input_dev->id.vendor = hdev->vendor;
input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
input_dev->id.version = hdev->version;
input_set_drvdata(input_dev, wacom);
return input_dev;
}
static int wacom_allocate_inputs(struct wacom *wacom)
{
struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
wacom_wac->pen_input = wacom_allocate_input(wacom);
wacom_wac->touch_input = wacom_allocate_input(wacom);
wacom_wac->pad_input = wacom_allocate_input(wacom);
if (!wacom_wac->pen_input ||
!wacom_wac->touch_input ||
!wacom_wac->pad_input)
return -ENOMEM;
wacom_wac->pen_input->name = wacom_wac->pen_name;
wacom_wac->touch_input->name = wacom_wac->touch_name;
wacom_wac->pad_input->name = wacom_wac->pad_name;
return 0;
}
static int wacom_setup_inputs(struct wacom *wacom)
{
struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
int error = 0;
pen_input_dev = wacom_wac->pen_input;
touch_input_dev = wacom_wac->touch_input;
pad_input_dev = wacom_wac->pad_input;
if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
return -EINVAL;
error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
if (error) {
/* no pen in use on this interface */
input_free_device(pen_input_dev);
wacom_wac->pen_input = NULL;
pen_input_dev = NULL;
}
error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
if (error) {
/* no touch in use on this interface */
input_free_device(touch_input_dev);
wacom_wac->touch_input = NULL;
touch_input_dev = NULL;
}
error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
if (error) {
/* no pad events using this interface */
input_free_device(pad_input_dev);
wacom_wac->pad_input = NULL;
pad_input_dev = NULL;
}
return 0;
}
static int wacom_register_inputs(struct wacom *wacom)
{
struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
int error = 0;
pen_input_dev = wacom_wac->pen_input;
touch_input_dev = wacom_wac->touch_input;
pad_input_dev = wacom_wac->pad_input;
if (pen_input_dev) {
error = input_register_device(pen_input_dev);
if (error)
goto fail;
}
if (touch_input_dev) {
error = input_register_device(touch_input_dev);
if (error)
goto fail;
}
if (pad_input_dev) {
error = input_register_device(pad_input_dev);
if (error)
goto fail;
}
return 0;
fail:
wacom_wac->pad_input = NULL;
wacom_wac->touch_input = NULL;
wacom_wac->pen_input = NULL;
return error;
}
/*
* Not all devices report physical dimensions from HID.
* Compute the default from hardcoded logical dimension
* and resolution before driver overwrites them.
*/
static void wacom_set_default_phy(struct wacom_features *features)
{
if (features->x_resolution) {
features->x_phy = (features->x_max * 100) /
features->x_resolution;
features->y_phy = (features->y_max * 100) /
features->y_resolution;
}
}
static void wacom_calculate_res(struct wacom_features *features)
{
/* set unit to "100th of a mm" for devices not reported by HID */
if (!features->unit) {
features->unit = 0x11;
features->unitExpo = -3;
}
features->x_resolution = wacom_calc_hid_res(features->x_max,
features->x_phy,
features->unit,
features->unitExpo);
features->y_resolution = wacom_calc_hid_res(features->y_max,
features->y_phy,
features->unit,
features->unitExpo);
}
void wacom_battery_work(struct work_struct *work)
{
struct wacom *wacom = container_of(work, struct wacom, battery_work);
if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
!wacom->battery.battery) {
wacom_initialize_battery(wacom);
}
else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
wacom->battery.battery) {
wacom_destroy_battery(wacom);
}
}
static size_t wacom_compute_pktlen(struct hid_device *hdev)
{
struct hid_report_enum *report_enum;
struct hid_report *report;
size_t size = 0;
report_enum = hdev->report_enum + HID_INPUT_REPORT;
list_for_each_entry(report, &report_enum->report_list, list) {
size_t report_size = hid_report_len(report);
if (report_size > size)
size = report_size;
}
return size;
}
static void wacom_update_name(struct wacom *wacom, const char *suffix)
{
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
struct wacom_features *features = &wacom_wac->features;
char name[WACOM_NAME_MAX - 20]; /* Leave some room for suffixes */
/* Generic devices name unspecified */
if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
char *product_name = wacom->hdev->name;
if (hid_is_usb(wacom->hdev)) {
struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
struct usb_device *dev = interface_to_usbdev(intf);
product_name = dev->product;
}
if (wacom->hdev->bus == BUS_I2C) {
snprintf(name, sizeof(name), "%s %X",
features->name, wacom->hdev->product);
} else if (strstr(product_name, "Wacom") ||
strstr(product_name, "wacom") ||
strstr(product_name, "WACOM")) {
if (strscpy(name, product_name, sizeof(name)) < 0) {
hid_warn(wacom->hdev, "String overflow while assembling device name");
}
} else {
snprintf(name, sizeof(name), "Wacom %s", product_name);
}
/* strip out excess whitespaces */
while (1) {
char *gap = strstr(name, " ");
if (gap == NULL)
break;
/* shift everything including the terminator */
memmove(gap, gap+1, strlen(gap));
}
/* get rid of trailing whitespace */
if (name[strlen(name)-1] == ' ')
name[strlen(name)-1] = '\0';
} else {
if (strscpy(name, features->name, sizeof(name)) < 0) {
hid_warn(wacom->hdev, "String overflow while assembling device name");
}
}
snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
name, suffix);
/* Append the device type to the name */
snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
"%s%s Pen", name, suffix);
snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
"%s%s Finger", name, suffix);
snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
"%s%s Pad", name, suffix);
}
static void wacom_release_resources(struct wacom *wacom)
{
struct hid_device *hdev = wacom->hdev;
if (!wacom->resources)
return;
devres_release_group(&hdev->dev, wacom);
wacom->resources = false;
wacom->wacom_wac.pen_input = NULL;
wacom->wacom_wac.touch_input = NULL;
wacom->wacom_wac.pad_input = NULL;
}
static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
{
if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
wacom_wac->shared->type = wacom_wac->features.type;
wacom_wac->shared->touch_input = wacom_wac->touch_input;
}
if (wacom_wac->has_mute_touch_switch) {
wacom_wac->shared->has_mute_touch_switch = true;
/* Hardware touch switch may be off. Wait until
* we know the switch state to decide is_touch_on.
* Softkey state should be initialized to "on" to
* match historic default.
*/
if (wacom_wac->is_soft_touch_switch)
wacom_wac->shared->is_touch_on = true;
}
if (wacom_wac->shared->has_mute_touch_switch &&
wacom_wac->shared->touch_input) {
set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
input_set_capability(wacom_wac->shared->touch_input, EV_SW,
SW_MUTE_DEVICE);
}
}
static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
{
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
struct wacom_features *features = &wacom_wac->features;
struct hid_device *hdev = wacom->hdev;
int error;
unsigned int connect_mask = HID_CONNECT_HIDRAW;
features->pktlen = wacom_compute_pktlen(hdev);
if (features->pktlen > WACOM_PKGLEN_MAX)
return -EINVAL;
if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
return -ENOMEM;
wacom->resources = true;
error = wacom_allocate_inputs(wacom);
if (error)
goto fail;
/*
* Bamboo Pad has a generic hid handling for the Pen, and we switch it
* into debug mode for the touch part.
* We ignore the other interfaces.
*/
if (features->type == BAMBOO_PAD) {
if (features->pktlen == WACOM_PKGLEN_PENABLED) {
features->type = HID_GENERIC;
} else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
(features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
error = -ENODEV;
goto fail;
}
}
/* set the default size in case we do not get them from hid */
wacom_set_default_phy(features);
/* Retrieve the physical and logical size for touch devices */
wacom_retrieve_hid_descriptor(hdev, features);
wacom_setup_device_quirks(wacom);
if (features->device_type == WACOM_DEVICETYPE_NONE &&
features->type != WIRELESS) {
error = features->type == HID_GENERIC ? -ENODEV : 0;
dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
hdev->name,
error ? "Ignoring" : "Assuming pen");
if (error)
goto fail;
features->device_type |= WACOM_DEVICETYPE_PEN;
}
wacom_calculate_res(features);
wacom_update_name(wacom, wireless ? " (WL)" : "");
/* pen only Bamboo neither support touch nor pad */
if ((features->type == BAMBOO_PEN) &&
((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
(features->device_type & WACOM_DEVICETYPE_PAD))) {
error = -ENODEV;
goto fail;
}
error = wacom_add_shared_data(hdev);
if (error)
goto fail;
error = wacom_setup_inputs(wacom);
if (error)
goto fail;
if (features->type == HID_GENERIC)
connect_mask |= HID_CONNECT_DRIVER;
/* Regular HID work starts now */
error = hid_hw_start(hdev, connect_mask);
if (error) {
hid_err(hdev, "hw start failed\n");
goto fail;
}
error = wacom_register_inputs(wacom);
if (error)
goto fail;
if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
error = wacom_initialize_leds(wacom);
if (error)
goto fail;
error = wacom_initialize_remotes(wacom);
if (error)
goto fail;
}
if (!wireless) {
/* Note that if query fails it is not a hard failure */
wacom_query_tablet_data(wacom);
}
/* touch only Bamboo doesn't support pen */
if ((features->type == BAMBOO_TOUCH) &&
(features->device_type & WACOM_DEVICETYPE_PEN)) {
cancel_delayed_work_sync(&wacom->init_work);
_wacom_query_tablet_data(wacom);
error = -ENODEV;
goto fail_quirks;
}
if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) {
error = hid_hw_open(hdev);
if (error) {
hid_err(hdev, "hw open failed\n");
goto fail_quirks;
}
}
wacom_set_shared_values(wacom_wac);
devres_close_group(&hdev->dev, wacom);
return 0;
fail_quirks:
hid_hw_stop(hdev);
fail:
wacom_release_resources(wacom);
return error;
}
static void wacom_wireless_work(struct work_struct *work)
{
struct wacom *wacom = container_of(work, struct wacom, wireless_work);
struct usb_device *usbdev = wacom->usbdev;
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
struct hid_device *hdev1, *hdev2;
struct wacom *wacom1, *wacom2;
struct wacom_wac *wacom_wac1, *wacom_wac2;
int error;
/*
* Regardless if this is a disconnect or a new tablet,
* remove any existing input and battery devices.
*/
wacom_destroy_battery(wacom);
if (!usbdev)
return;
/* Stylus interface */
hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
wacom1 = hid_get_drvdata(hdev1);
wacom_wac1 = &(wacom1->wacom_wac);
wacom_release_resources(wacom1);
/* Touch interface */
hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
wacom2 = hid_get_drvdata(hdev2);
wacom_wac2 = &(wacom2->wacom_wac);
wacom_release_resources(wacom2);
if (wacom_wac->pid == 0) {
hid_info(wacom->hdev, "wireless tablet disconnected\n");
} else {
const struct hid_device_id *id = wacom_ids;
hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
wacom_wac->pid);
while (id->bus) {
if (id->vendor == USB_VENDOR_ID_WACOM &&
id->product == wacom_wac->pid)
break;
id++;
}
if (!id->bus) {
hid_info(wacom->hdev, "ignoring unknown PID.\n");
return;
}
/* Stylus interface */
wacom_wac1->features =
*((struct wacom_features *)id->driver_data);
wacom_wac1->pid = wacom_wac->pid;
hid_hw_stop(hdev1);
error = wacom_parse_and_register(wacom1, true);
if (error)
goto fail;
/* Touch interface */
if (wacom_wac1->features.touch_max ||
(wacom_wac1->features.type >= INTUOSHT &&
wacom_wac1->features.type <= BAMBOO_PT)) {
wacom_wac2->features =
*((struct wacom_features *)id->driver_data);
wacom_wac2->pid = wacom_wac->pid;
hid_hw_stop(hdev2);
error = wacom_parse_and_register(wacom2, true);
if (error)
goto fail;
}
if (strscpy(wacom_wac->name, wacom_wac1->name,
sizeof(wacom_wac->name)) < 0) {
hid_warn(wacom->hdev, "String overflow while assembling device name");
}
}
return;
fail:
wacom_release_resources(wacom1);
wacom_release_resources(wacom2);
return;
}
static void wacom_remote_destroy_battery(struct wacom *wacom, int index)
{
struct wacom_remote *remote = wacom->remote;
if (remote->remotes[index].battery.battery) {
devres_release_group(&wacom->hdev->dev,
&remote->remotes[index].battery.bat_desc);
remote->remotes[index].battery.battery = NULL;
remote->remotes[index].active_time = 0;
}
}
static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
{
struct wacom_remote *remote = wacom->remote;
u32 serial = remote->remotes[index].serial;
int i;
unsigned long flags;
for (i = 0; i < WACOM_MAX_REMOTES; i++) {
if (remote->remotes[i].serial == serial) {
spin_lock_irqsave(&remote->remote_lock, flags);
remote->remotes[i].registered = false;
spin_unlock_irqrestore(&remote->remote_lock, flags);
wacom_remote_destroy_battery(wacom, i);
if (remote->remotes[i].group.name)
devres_release_group(&wacom->hdev->dev,
&remote->remotes[i]);
remote->remotes[i].serial = 0;
remote->remotes[i].group.name = NULL;
wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
}
}
}
static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
unsigned int index)
{
struct wacom_remote *remote = wacom->remote;
struct device *dev = &wacom->hdev->dev;
int error, k;
/* A remote can pair more than once with an EKR,
* check to make sure this serial isn't already paired.
*/
for (k = 0; k < WACOM_MAX_REMOTES; k++) {
if (remote->remotes[k].serial == serial)
break;
}
if (k < WACOM_MAX_REMOTES) {
remote->remotes[index].serial = serial;
return 0;
}
if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
return -ENOMEM;
error = wacom_remote_create_attr_group(wacom, serial, index);
if (error)
goto fail;
remote->remotes[index].input = wacom_allocate_input(wacom);
if (!remote->remotes[index].input) {
error = -ENOMEM;
goto fail;
}
remote->remotes[index].input->uniq = remote->remotes[index].group.name;
remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
if (!remote->remotes[index].input->name) {
error = -EINVAL;
goto fail;
}
error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
&wacom->wacom_wac);
if (error)
goto fail;
remote->remotes[index].serial = serial;
error = input_register_device(remote->remotes[index].input);
if (error)
goto fail;
error = wacom_led_groups_alloc_and_register_one(
&remote->remotes[index].input->dev,
wacom, index, 3, true);
if (error)
goto fail;
remote->remotes[index].registered = true;
devres_close_group(dev, &remote->remotes[index]);
return 0;
fail:
devres_release_group(dev, &remote->remotes[index]);
remote->remotes[index].serial = 0;
return error;
}
static int wacom_remote_attach_battery(struct wacom *wacom, int index)
{
struct wacom_remote *remote = wacom->remote;
int error;
if (!remote->remotes[index].registered)
return 0;
if (remote->remotes[index].battery.battery)
return 0;
if (!remote->remotes[index].active_time)
return 0;
if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
return 0;
error = __wacom_initialize_battery(wacom,
&wacom->remote->remotes[index].battery);
if (error)
return error;
return 0;
}
static void wacom_remote_work(struct work_struct *work)
{
struct wacom *wacom = container_of(work, struct wacom, remote_work);
struct wacom_remote *remote = wacom->remote;
ktime_t kt = ktime_get();
struct wacom_remote_work_data remote_work_data;
unsigned long flags;
unsigned int count;
u32 work_serial;
int i;
spin_lock_irqsave(&remote->remote_lock, flags);
count = kfifo_out(&remote->remote_fifo, &remote_work_data,
sizeof(remote_work_data));
if (count != sizeof(remote_work_data)) {
hid_err(wacom->hdev,
"workitem triggered without status available\n");
spin_unlock_irqrestore(&remote->remote_lock, flags);
return;
}
if (!kfifo_is_empty(&remote->remote_fifo))
wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
spin_unlock_irqrestore(&remote->remote_lock, flags);
for (i = 0; i < WACOM_MAX_REMOTES; i++) {
work_serial = remote_work_data.remote[i].serial;
if (work_serial) {
if (kt - remote->remotes[i].active_time > WACOM_REMOTE_BATTERY_TIMEOUT
&& remote->remotes[i].active_time != 0)
wacom_remote_destroy_battery(wacom, i);
if (remote->remotes[i].serial == work_serial) {
wacom_remote_attach_battery(wacom, i);
continue;
}
if (remote->remotes[i].serial)
wacom_remote_destroy_one(wacom, i);
wacom_remote_create_one(wacom, work_serial, i);
} else if (remote->remotes[i].serial) {
wacom_remote_destroy_one(wacom, i);
}
}
}
static void wacom_mode_change_work(struct work_struct *work)
{
struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
struct wacom_shared *shared = wacom->wacom_wac.shared;
struct wacom *wacom1 = NULL;
struct wacom *wacom2 = NULL;
bool is_direct = wacom->wacom_wac.is_direct_mode;
int error = 0;
if (shared->pen) {
wacom1 = hid_get_drvdata(shared->pen);
wacom_release_resources(wacom1);
hid_hw_stop(wacom1->hdev);
wacom1->wacom_wac.has_mode_change = true;
wacom1->wacom_wac.is_direct_mode = is_direct;
}
if (shared->touch) {
wacom2 = hid_get_drvdata(shared->touch);
wacom_release_resources(wacom2);
hid_hw_stop(wacom2->hdev);
wacom2->wacom_wac.has_mode_change = true;
wacom2->wacom_wac.is_direct_mode = is_direct;
}
if (wacom1) {
error = wacom_parse_and_register(wacom1, false);
if (error)
return;
}
if (wacom2) {
error = wacom_parse_and_register(wacom2, false);
if (error)
return;
}
return;
}
static int wacom_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
struct wacom *wacom;
struct wacom_wac *wacom_wac;
struct wacom_features *features;
int error;
if (!id->driver_data)
return -EINVAL;
hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
/* hid-core sets this quirk for the boot interface */
hdev->quirks &= ~HID_QUIRK_NOGET;
wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
if (!wacom)
return -ENOMEM;
hid_set_drvdata(hdev, wacom);
wacom->hdev = hdev;
wacom_wac = &wacom->wacom_wac;
wacom_wac->features = *((struct wacom_features *)id->driver_data);
features = &wacom_wac->features;
if (features->check_for_hid_type && features->hid_type != hdev->type)
return -ENODEV;
error = wacom_devm_kfifo_alloc(wacom);
if (error)
return error;
wacom_wac->hid_data.inputmode = -1;
wacom_wac->mode_report = -1;
if (hid_is_usb(hdev)) {
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
struct usb_device *dev = interface_to_usbdev(intf);
wacom->usbdev = dev;
wacom->intf = intf;
}
mutex_init(&wacom->lock);
INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
INIT_DELAYED_WORK(&wacom->aes_battery_work, wacom_aes_battery_handler);
INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
INIT_WORK(&wacom->battery_work, wacom_battery_work);
INIT_WORK(&wacom->remote_work, wacom_remote_work);
INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
timer_setup(&wacom->idleprox_timer, &wacom_idleprox_timeout, TIMER_DEFERRABLE);
/* ask for the report descriptor to be loaded by HID */
error = hid_parse(hdev);
if (error) {
hid_err(hdev, "parse failed\n");
return error;
}
if (features->type == BOOTLOADER) {
hid_warn(hdev, "Using device in hidraw-only mode");
return hid_hw_start(hdev, HID_CONNECT_HIDRAW);
}
error = wacom_parse_and_register(wacom, false);
if (error)
return error;
if (hdev->bus == BUS_BLUETOOTH) {
error = device_create_file(&hdev->dev, &dev_attr_speed);
if (error)
hid_warn(hdev,
"can't create sysfs speed attribute err: %d\n",
error);
}
wacom_wac->probe_complete = true;
return 0;
}
static void wacom_remove(struct hid_device *hdev)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
struct wacom_features *features = &wacom_wac->features;
if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
hid_hw_close(hdev);
hid_hw_stop(hdev);
cancel_delayed_work_sync(&wacom->init_work);
cancel_work_sync(&wacom->wireless_work);
cancel_work_sync(&wacom->battery_work);
cancel_work_sync(&wacom->remote_work);
cancel_work_sync(&wacom->mode_change_work);
del_timer_sync(&wacom->idleprox_timer);
if (hdev->bus == BUS_BLUETOOTH)
device_remove_file(&hdev->dev, &dev_attr_speed);
/* make sure we don't trigger the LEDs */
wacom_led_groups_release(wacom);
if (wacom->wacom_wac.features.type != REMOTE)
wacom_release_resources(wacom);
}
#ifdef CONFIG_PM
static int wacom_resume(struct hid_device *hdev)
{
struct wacom *wacom = hid_get_drvdata(hdev);
mutex_lock(&wacom->lock);
/* switch to wacom mode first */
_wacom_query_tablet_data(wacom);
wacom_led_control(wacom);
mutex_unlock(&wacom->lock);
return 0;
}
static int wacom_reset_resume(struct hid_device *hdev)
{
return wacom_resume(hdev);
}
#endif /* CONFIG_PM */
static struct hid_driver wacom_driver = {
.name = "wacom",
.id_table = wacom_ids,
.probe = wacom_probe,
.remove = wacom_remove,
.report = wacom_wac_report,
#ifdef CONFIG_PM
.resume = wacom_resume,
.reset_resume = wacom_reset_resume,
#endif
.raw_event = wacom_raw_event,
};
module_hid_driver(wacom_driver);
MODULE_VERSION(DRIVER_VERSION);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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