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/*
* Plantronics USB HID Driver
*
* Copyright (c) 2014 JD Cole <jd.cole@plantronics.com>
* Copyright (c) 2015-2018 Terry Junge <terry.junge@plantronics.com>
*/
/*
* 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 "hid-ids.h"
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/jiffies.h>
#define PLT_HID_1_0_PAGE 0xffa00000
#define PLT_HID_2_0_PAGE 0xffa20000
#define PLT_BASIC_TELEPHONY 0x0003
#define PLT_BASIC_EXCEPTION 0x0005
#define PLT_VOL_UP 0x00b1
#define PLT_VOL_DOWN 0x00b2
#define PLT1_VOL_UP (PLT_HID_1_0_PAGE | PLT_VOL_UP)
#define PLT1_VOL_DOWN (PLT_HID_1_0_PAGE | PLT_VOL_DOWN)
#define PLT2_VOL_UP (PLT_HID_2_0_PAGE | PLT_VOL_UP)
#define PLT2_VOL_DOWN (PLT_HID_2_0_PAGE | PLT_VOL_DOWN)
#define PLT_DA60 0xda60
#define PLT_BT300_MIN 0x0413
#define PLT_BT300_MAX 0x0418
#define PLT_ALLOW_CONSUMER (field->application == HID_CP_CONSUMERCONTROL && \
(usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER)
#define PLT_QUIRK_DOUBLE_VOLUME_KEYS BIT(0)
#define PLT_DOUBLE_KEY_TIMEOUT 5 /* ms */
struct plt_drv_data {
unsigned long device_type;
unsigned long last_volume_key_ts;
u32 quirks;
};
static int plantronics_input_mapping(struct hid_device *hdev,
struct hid_input *hi,
struct hid_field *field,
struct hid_usage *usage,
unsigned long **bit, int *max)
{
unsigned short mapped_key;
struct plt_drv_data *drv_data = hid_get_drvdata(hdev);
unsigned long plt_type = drv_data->device_type;
/* special case for PTT products */
if (field->application == HID_GD_JOYSTICK)
goto defaulted;
/* handle volume up/down mapping */
/* non-standard types or multi-HID interfaces - plt_type is PID */
if (!(plt_type & HID_USAGE_PAGE)) {
switch (plt_type) {
case PLT_DA60:
if (PLT_ALLOW_CONSUMER)
goto defaulted;
goto ignored;
default:
if (PLT_ALLOW_CONSUMER)
goto defaulted;
}
}
/* handle standard types - plt_type is 0xffa0uuuu or 0xffa2uuuu */
/* 'basic telephony compliant' - allow default consumer page map */
else if ((plt_type & HID_USAGE) >= PLT_BASIC_TELEPHONY &&
(plt_type & HID_USAGE) != PLT_BASIC_EXCEPTION) {
if (PLT_ALLOW_CONSUMER)
goto defaulted;
}
/* not 'basic telephony' - apply legacy mapping */
/* only map if the field is in the device's primary vendor page */
else if (!((field->application ^ plt_type) & HID_USAGE_PAGE)) {
switch (usage->hid) {
case PLT1_VOL_UP:
case PLT2_VOL_UP:
mapped_key = KEY_VOLUMEUP;
goto mapped;
case PLT1_VOL_DOWN:
case PLT2_VOL_DOWN:
mapped_key = KEY_VOLUMEDOWN;
goto mapped;
}
}
/*
* Future mapping of call control or other usages,
* if and when keys are defined would go here
* otherwise, ignore everything else that was not mapped
*/
ignored:
return -1;
defaulted:
hid_dbg(hdev, "usage: %08x (appl: %08x) - defaulted\n",
usage->hid, field->application);
return 0;
mapped:
hid_map_usage_clear(hi, usage, bit, max, EV_KEY, mapped_key);
hid_dbg(hdev, "usage: %08x (appl: %08x) - mapped to key %d\n",
usage->hid, field->application, mapped_key);
return 1;
}
static int plantronics_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
struct plt_drv_data *drv_data = hid_get_drvdata(hdev);
if (drv_data->quirks & PLT_QUIRK_DOUBLE_VOLUME_KEYS) {
unsigned long prev_ts, cur_ts;
/* Usages are filtered in plantronics_usages. */
if (!value) /* Handle key presses only. */
return 0;
prev_ts = drv_data->last_volume_key_ts;
cur_ts = jiffies;
if (jiffies_to_msecs(cur_ts - prev_ts) <= PLT_DOUBLE_KEY_TIMEOUT)
return 1; /* Ignore the repeated key. */
drv_data->last_volume_key_ts = cur_ts;
}
return 0;
}
static unsigned long plantronics_device_type(struct hid_device *hdev)
{
unsigned i, col_page;
unsigned long plt_type = hdev->product;
/* multi-HID interfaces? - plt_type is PID */
if (plt_type >= PLT_BT300_MIN && plt_type <= PLT_BT300_MAX)
goto exit;
/* determine primary vendor page */
for (i = 0; i < hdev->maxcollection; i++) {
col_page = hdev->collection[i].usage & HID_USAGE_PAGE;
if (col_page == PLT_HID_2_0_PAGE) {
plt_type = hdev->collection[i].usage;
break;
}
if (col_page == PLT_HID_1_0_PAGE)
plt_type = hdev->collection[i].usage;
}
exit:
hid_dbg(hdev, "plt_type decoded as: %08lx\n", plt_type);
return plt_type;
}
static int plantronics_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
struct plt_drv_data *drv_data;
int ret;
drv_data = devm_kzalloc(&hdev->dev, sizeof(*drv_data), GFP_KERNEL);
if (!drv_data)
return -ENOMEM;
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
goto err;
}
drv_data->device_type = plantronics_device_type(hdev);
drv_data->quirks = id->driver_data;
drv_data->last_volume_key_ts = jiffies - msecs_to_jiffies(PLT_DOUBLE_KEY_TIMEOUT);
hid_set_drvdata(hdev, drv_data);
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
HID_CONNECT_HIDINPUT_FORCE | HID_CONNECT_HIDDEV_FORCE);
if (ret)
hid_err(hdev, "hw start failed\n");
err:
return ret;
}
static const struct hid_device_id plantronics_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_PLANTRONICS,
USB_DEVICE_ID_PLANTRONICS_BLACKWIRE_3220_SERIES),
.driver_data = PLT_QUIRK_DOUBLE_VOLUME_KEYS },
{ HID_USB_DEVICE(USB_VENDOR_ID_PLANTRONICS, HID_ANY_ID) },
{ }
};
MODULE_DEVICE_TABLE(hid, plantronics_devices);
static const struct hid_usage_id plantronics_usages[] = {
{ HID_CP_VOLUMEUP, EV_KEY, HID_ANY_ID },
{ HID_CP_VOLUMEDOWN, EV_KEY, HID_ANY_ID },
{ HID_TERMINATOR, HID_TERMINATOR, HID_TERMINATOR }
};
static struct hid_driver plantronics_driver = {
.name = "plantronics",
.id_table = plantronics_devices,
.usage_table = plantronics_usages,
.input_mapping = plantronics_input_mapping,
.event = plantronics_event,
.probe = plantronics_probe,
};
module_hid_driver(plantronics_driver);
MODULE_AUTHOR("JD Cole <jd.cole@plantronics.com>");
MODULE_AUTHOR("Terry Junge <terry.junge@plantronics.com>");
MODULE_DESCRIPTION("Plantronics USB HID Driver");
MODULE_LICENSE("GPL");
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