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linux/drivers/hid/wacom_sys.c

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/*
* drivers/input/tablet/wacom_sys.c
*
* USB Wacom tablet support - system specific code
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#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 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, 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 (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_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;
switch (equivalent_usage) {
case HID_DG_CONTACTMAX:
/* leave touch_max as is if predefined */
if (!features->touch_max) {
/* read manually */
data = kzalloc(2, GFP_KERNEL);
if (!data)
break;
data[0] = field->report->id;
ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
data, 2, WAC_CMD_RETRIES);
if (ret == 2) {
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;
}
if (hdev->vendor == USB_VENDOR_ID_WACOM &&
hdev->product == 0x4200 /* Dell Canvas 27 */ &&
field->application == HID_UP_MSVENDOR) {
wacom->wacom_wac.mode_report = field->report->id;
wacom->wacom_wac.mode_value = 2;
}
}
/*
* 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);
/*
* 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;
/*
* Bamboo models do not support HID_DG_CONTACTMAX.
* And, Bamboo Pen only descriptor contains touch.
*/
if (features->type > BAMBOO_PT) {
/* ISDv4 touch devices at least supports one touch point */
if (finger && !features->touch_max)
features->touch_max = 1;
}
/*
* 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;
}
}
switch (usage->hid) {
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) {
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 compare_device_paths(struct hid_device *hdev_a,
struct hid_device *hdev_b, char separator)
{
int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
if (n1 != n2 || n1 <= 0 || n2 <= 0)
return false;
return !strncmp(hdev_a->phys, hdev_b->phys, n1);
}
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 (!compare_device_paths(hdev, sibling, '/'))
return false;
} else {
if (!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 (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) {
retval = -ENOMEM;
goto out;
}
kref_init(&data->kref);
data->dev = hdev;
list_add_tail(&data->list, &wacom_udev_list);
}
wacom_wac->shared = &data->shared;
retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
if (retval) {
mutex_unlock(&wacom_udev_list_lock);
wacom_remove_shared_data(wacom);
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;
out:
mutex_unlock(&wacom_udev_list_lock);
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 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 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 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 struct attribute_group generic_led_attr_group = {
.name = "wacom_led",
.attrs = generic_led_attrs,
};
struct wacom_sysfs_group_devres {
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,
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,
struct attribute_group *group)
{
return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
group);
}
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_USB;
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 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 snprintf(buf, PAGE_SIZE, "%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 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_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_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 || !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;
} else {
error = input_register_device(pen_input_dev);
if (error)
goto fail;
}
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;
} else {
error = input_register_device(touch_input_dev);
if (error)
goto fail;
}
error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
if (error) {
/* no pad in use on this interface */
input_free_device(pad_input_dev);
wacom_wac->pad_input = NULL;
pad_input_dev = NULL;
} else {
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];
/* Generic devices name unspecified */
if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
char *product_name = wacom->hdev->name;
if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
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")) {
strlcpy(name, product_name, sizeof(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 {
strlcpy(name, features->name, sizeof(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;
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;
if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
(features->quirks & WACOM_QUIRK_BATTERY)) {
error = wacom_initialize_battery(wacom);
if (error)
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 (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;
}
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);
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);
/* 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;
}
strlcpy(wacom_wac->name, wacom_wac1->name,
sizeof(wacom_wac->name));
error = wacom_initialize_battery(wacom);
if (error)
goto fail;
}
return;
fail:
wacom_release_resources(wacom1);
wacom_release_resources(wacom2);
return;
}
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);
if (remote->remotes[i].battery.battery)
devres_release_group(&wacom->hdev->dev,
&remote->remotes[i].battery.bat_desc);
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;
remote->remotes[i].battery.battery = 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 (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;
struct wacom_remote_data data;
unsigned long flags;
unsigned int count;
u32 serial;
int i;
spin_lock_irqsave(&remote->remote_lock, flags);
count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
if (count != sizeof(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++) {
serial = data.remote[i].serial;
if (data.remote[i].connected) {
if (remote->remotes[i].serial == serial) {
wacom_remote_attach_battery(wacom, i);
continue;
}
if (remote->remotes[i].serial)
wacom_remote_destroy_one(wacom, i);
wacom_remote_create_one(wacom, 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 usb_interface *intf = to_usb_interface(hdev->dev.parent);
struct usb_device *dev = interface_to_usbdev(intf);
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) {
error = -ENODEV;
goto fail;
}
error = kfifo_alloc(&wacom_wac->pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL);
if (error)
goto fail;
wacom_wac->hid_data.inputmode = -1;
wacom_wac->mode_report = -1;
wacom->usbdev = dev;
wacom->intf = intf;
mutex_init(&wacom->lock);
INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
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);
/* ask for the report descriptor to be loaded by HID */
error = hid_parse(hdev);
if (error) {
hid_err(hdev, "parse failed\n");
goto fail;
}
error = wacom_parse_and_register(wacom, false);
if (error)
goto fail;
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);
}
return 0;
fail:
hid_set_drvdata(hdev, NULL);
return error;
}
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);
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);
kfifo_free(&wacom_wac->pen_fifo);
hid_set_drvdata(hdev, NULL);
}
#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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