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HID: plantronics: Update to map volume up/down controls 

Update Kconfig with enhanced help text for hid-plantronics driver.

Update hid-plantronics.c to identify device type and correctly map
either the vendor unique or consumer control volume up/down usages
to KEY_VOLUMEUP and KEY_VOLUMEDOWN events. Unmapped usages are ignored
to prevent core mapping of unknown usages to random mouse events.

Tested on ChromeBox/ChromeBook with various Plantronics devices.

Signed-off-by: Terry Junge <terry.junge@plantronics.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Terry Junge 2015-06-08 14:27:57 -07:00 committed by Jiri Kosina
parent 6efdb114b4
commit 81bb773fae
2 changed files with 130 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/hid/Kconfig
View File

@ -634,7 +634,12 @@ config HID_PLANTRONICS
tristate "Plantronics USB HID Driver"
depends on HID
---help---
Provides HID support for Plantronics telephony devices.
Provides HID support for Plantronics USB audio devices.
Correctly maps vendor unique volume up/down HID usages to
KEY_VOLUMEUP and KEY_VOLUMEDOWN events and prevents core mapping
of other vendor unique HID usages to random mouse events.
Say M here if you may ever plug in a Plantronics USB audio device.
config HID_PRIMAX
tristate "Primax non-fully HID-compliant devices"

132
drivers/hid/hid-plantronics.c
View File

@ -2,7 +2,7 @@
* Plantronics USB HID Driver
*
* Copyright (c) 2014 JD Cole <jd.cole@plantronics.com>
* Copyright (c) 2014 Terry Junge <terry.junge@plantronics.com>
* Copyright (c) 2015 Terry Junge <terry.junge@plantronics.com>
*/
/*
@ -17,23 +17,138 @@
#include <linux/hid.h>
#include <linux/module.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)
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)
{
if (field->application == HID_CP_CONSUMERCONTROL
&& (usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
hid_dbg(hdev, "usage: %08x (appl: %08x) - defaulted\n",
usage->hid, field->application);
return 0;
unsigned short mapped_key;
unsigned long plt_type = (unsigned long)hid_get_drvdata(hdev);
/* 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;
}
}
hid_dbg(hdev, "usage: %08x (appl: %08x) - ignored\n",
usage->hid, field->application);
/*
* 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 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)
{
int ret;
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
goto err;
}
hid_set_drvdata(hdev, (void *)plantronics_device_type(hdev));
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[] = {
@ -46,6 +161,7 @@ static struct hid_driver plantronics_driver = {
.name = "plantronics",
.id_table = plantronics_devices,
.input_mapping = plantronics_input_mapping,
.probe = plantronics_probe,
};
module_hid_driver(plantronics_driver);