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authorOlivier Gay <ogay@logitech.com>2015-02-17 14:00:03 +0100
committerJiri Kosina <jkosina@suse.cz>2015-02-23 16:17:32 +0100
commita877417ed4368b51f57e879b52793260981ddcaa (patch)
treee08d875df128ba23fc9c1d3bd81ca0df75a724a8 /drivers/hid
parent870fd0f5df4e131467612cc46db46fc3b69fd706 (diff)
downloadblackbird-op-linux-a877417ed4368b51f57e879b52793260981ddcaa.tar.gz
blackbird-op-linux-a877417ed4368b51f57e879b52793260981ddcaa.zip
HID: expose country code in sysfs
This commit exposes in sysfs the HID country code that is stored in the country member of hid_device structure. It identifies the country code of localized hardware. For example some keyboards use it to exhibit the language of the key layout. It helps the upper layer to identify the localized hardware and setup the correct language to use. For USB HID devices the country code comes for the HID descriptor and for Bluetooth HID devices it is the HIDCountryCode attribute from the SDP database. Signed-off-by: Olivier Gay <ogay@logitech.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-core.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index db4fb6e1cc5b..4bae0f598ff8 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1562,12 +1562,26 @@ read_report_descriptor(struct file *filp, struct kobject *kobj,
return count;
}
+static ssize_t
+show_country(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+
+ return sprintf(buf, "%02x\n", hdev->country & 0xff);
+}
+
static struct bin_attribute dev_bin_attr_report_desc = {
.attr = { .name = "report_descriptor", .mode = 0444 },
.read = read_report_descriptor,
.size = HID_MAX_DESCRIPTOR_SIZE,
};
+static struct device_attribute dev_attr_country = {
+ .attr = { .name = "country", .mode = 0444 },
+ .show = show_country,
+};
+
int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
{
static const char *types[] = { "Device", "Pointer", "Mouse", "Device",
@@ -1646,6 +1660,11 @@ int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
bus = "<UNKNOWN>";
}
+ ret = device_create_file(&hdev->dev, &dev_attr_country);
+ if (ret)
+ hid_warn(hdev,
+ "can't create sysfs country code attribute err: %d\n", ret);
+
ret = device_create_bin_file(&hdev->dev, &dev_bin_attr_report_desc);
if (ret)
hid_warn(hdev,
@@ -1661,6 +1680,7 @@ EXPORT_SYMBOL_GPL(hid_connect);
void hid_disconnect(struct hid_device *hdev)
{
+ device_remove_file(&hdev->dev, &dev_attr_country);
device_remove_bin_file(&hdev->dev, &dev_bin_attr_report_desc);
if (hdev->claimed & HID_CLAIMED_INPUT)
hidinput_disconnect(hdev);
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