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HID: sensors: autodetect USB HID sensor hubs 

It should not be necessary to add IDs for HID sensor hubs to lists in
hid-core.c and hid-sensor-hub.c. So instead of a whitelist, autodetect such USB
HID sensor hubs, based on a collection of type physical inside a useage page of
type sensor. If some sensor hubs stil must be usable as raw devices, a
blacklist might be created.

Signed-off-by: Alexander Holler <holler@ahsoftware.de>
Acked-by: "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Alexander Holler 2012-12-09 12:44:30 +01:00 committed by Jiri Kosina
parent 1a1e8c6fad
commit 83499b52c6
4 changed files with 13 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/hid/hid-core.c
View File

@ -713,7 +713,12 @@ static int hid_scan_report(struct hid_device *hid)
hid_scan_usage(hid, u);
break;
}
}
} else if (page == HID_UP_SENSOR &&
item.type == HID_ITEM_TYPE_MAIN &&
item.tag == HID_MAIN_ITEM_TAG_BEGIN_COLLECTION &&
(item_udata(&item) & 0xff) == HID_COLLECTION_PHYSICAL &&
hid->bus == BUS_USB)
hid->group = HID_GROUP_SENSOR_HUB;
}
return 0;
@ -1465,6 +1470,10 @@ EXPORT_SYMBOL_GPL(hid_disconnect);
* there is a proper autodetection and autoloading in place (based on presence
* of HID_DG_CONTACTID), so those devices don't need to be added to this list,
* as we are doing the right thing in hid_scan_usage().
*
* Autodetection for (USB) HID sensor hubs exists too. If a collection of type
* physical is found inside a usage page of type sensor, hid-sensor-hub will be
* used as a driver. See hid_scan_report().
*/
static const struct hid_device_id hid_have_special_driver[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },

32
drivers/hid/hid-sensor-hub.c
View File

@ -82,23 +82,6 @@ struct hid_sensor_hub_callbacks_list {
void *priv;
};
static int sensor_hub_check_for_sensor_page(struct hid_device *hdev)
{
int i;
int ret = -EINVAL;
for (i = 0; i < hdev->maxcollection; i++) {
struct hid_collection *col = &hdev->collection[i];
if (col->type == HID_COLLECTION_PHYSICAL &&
(col->usage & HID_USAGE_PAGE) == HID_UP_SENSOR) {
ret = 0;
break;
}
}
return ret;
}
static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
int dir)
{
@ -524,10 +507,6 @@ static int sensor_hub_probe(struct hid_device *hdev,
hid_err(hdev, "parse failed\n");
goto err_free;
}
if (sensor_hub_check_for_sensor_page(hdev) < 0) {
hid_err(hdev, "sensor page not found\n");
goto err_free;
}
INIT_LIST_HEAD(&hdev->inputs);
ret = hid_hw_start(hdev, 0);
@ -630,16 +609,7 @@ static void sensor_hub_remove(struct hid_device *hdev)
}
static const struct hid_device_id sensor_hub_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8086,
USB_DEVICE_ID_SENSOR_HUB_1020) },
{ HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8087,
USB_DEVICE_ID_SENSOR_HUB_1020) },
{ HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8086,
USB_DEVICE_ID_SENSOR_HUB_09FA) },
{ HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8087,
USB_DEVICE_ID_SENSOR_HUB_09FA) },
{ HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
USB_DEVICE_ID_SENSOR_HUB_7014) },
{ HID_DEVICE(BUS_USB, HID_GROUP_SENSOR_HUB, HID_ANY_ID, HID_ANY_ID) },
{ }
};
MODULE_DEVICE_TABLE(hid, sensor_hub_devices);

1
include/linux/hid-sensor-ids.h
View File

@ -19,7 +19,6 @@
#ifndef _HID_SENSORS_IDS_H
#define _HID_SENSORS_IDS_H
#define HID_UP_SENSOR 0x00200000
#define HID_MAX_PHY_DEVICES 0xFF
/* Accel 3D (200073) */

2
include/linux/hid.h
View File

@ -167,6 +167,7 @@ struct hid_item {
#define HID_UP_MSVENDOR 0xff000000
#define HID_UP_CUSTOM 0x00ff0000
#define HID_UP_LOGIVENDOR 0xffbc0000
#define HID_UP_SENSOR 0x00200000
#define HID_USAGE 0x0000ffff
@ -292,6 +293,7 @@ struct hid_item {
*/
#define HID_GROUP_GENERIC 0x0001
#define HID_GROUP_MULTITOUCH 0x0002
#define HID_GROUP_SENSOR_HUB 0x0003
/*
* This is the global environment of the parser. This information is