Non-HID service data may be encapsulated on the HID protocol and
transfered as a HID Report. This descriptor is used to map a report
on the USB-HID descriptor that transports non-HID data to the
characteristic on a external service that will actually transport the
data on GATT devices.
---
profiles/input/hog_device.c | 54 +++++++++++++++++++++++++++++++++------------
1 file changed, 40 insertions(+), 14 deletions(-)
diff --git a/profiles/input/hog_device.c b/profiles/input/hog_device.c
index ffd7139..f4cf596 100644
--- a/profiles/input/hog_device.c
+++ b/profiles/input/hog_device.c
@@ -170,6 +170,23 @@ static void write_ccc(uint16_t handle, gpointer user_data)
report_ccc_written_cb, hogdev);
}
+static void external_report_reference_cb(guint8 status, const guint8 *pdu,
+ guint16 plen, gpointer user_data)
+{
+ if (status != 0) {
+ error("Read External Report Reference descriptor failed: %s",
+ att_ecode2str(status));
+ return;
+ }
+
+ if (plen != 3) {
+ error("Malformed ATT read response");
+ return;
+ }
+
+ DBG("External Report Reference read: 0x%02x 0x%02x", pdu[1], pdu[2]);
+}
+
static void report_reference_cb(guint8 status, const guint8 *pdu,
guint16 plen, gpointer user_data)
{
@@ -194,8 +211,8 @@ static void report_reference_cb(guint8 status, const guint8 *pdu,
static void discover_descriptor_cb(guint8 status, const guint8 *pdu,
guint16 len, gpointer user_data)
{
- struct report *report = user_data;
- struct hog_device *hogdev = report->hogdev;
+ struct report *report;
+ struct hog_device *hogdev;
struct att_data_list *list;
uint8_t format;
int i;
@@ -221,11 +238,22 @@ static void discover_descriptor_cb(guint8 status, const guint8 *pdu,
handle = att_get_u16(value);
uuid16 = att_get_u16(&value[2]);
- if (uuid16 == GATT_CLIENT_CHARAC_CFG_UUID)
- write_ccc(handle, hogdev);
- else if (uuid16 == GATT_REPORT_REFERENCE)
+ switch (uuid16) {
+ case GATT_CLIENT_CHARAC_CFG_UUID:
+ report = user_data;
+ write_ccc(handle, report->hogdev);
+ break;
+ case GATT_REPORT_REFERENCE:
+ report = user_data;
+ gatt_read_char(report->hogdev->attrib, handle, 0,
+ report_reference_cb, report);
+ break;
+ case GATT_EXTERNAL_REPORT_REFERENCE:
+ hogdev = user_data;
gatt_read_char(hogdev->attrib, handle, 0,
- report_reference_cb, report);
+ external_report_reference_cb, hogdev);
+ break;
+ }
}
done:
@@ -372,7 +400,7 @@ static void char_discovered_cb(GSList *chars, guint8 status, gpointer user_data)
bt_uuid_t report_uuid, report_map_uuid, info_uuid, proto_mode_uuid;
struct report *report;
GSList *l;
- uint16_t map_handle = 0, info_handle = 0, proto_mode_handle = 0;
+ uint16_t info_handle = 0, proto_mode_handle = 0;
if (status != 0) {
const char *str = att_ecode2str(status);
@@ -404,9 +432,11 @@ static void char_discovered_cb(GSList *chars, guint8 status, gpointer user_data)
hogdev->reports = g_slist_append(hogdev->reports,
report);
discover_descriptor(hogdev->attrib, chr, next, report);
- } else if (bt_uuid_cmp(&uuid, &report_map_uuid) == 0)
- map_handle = chr->value_handle;
- else if (bt_uuid_cmp(&uuid, &info_uuid) == 0)
+ } else if (bt_uuid_cmp(&uuid, &report_map_uuid) == 0) {
+ gatt_read_char(hogdev->attrib, chr->value_handle, 0,
+ report_map_read_cb, hogdev);
+ discover_descriptor(hogdev->attrib, chr, next, NULL);
+ } else if (bt_uuid_cmp(&uuid, &info_uuid) == 0)
info_handle = chr->value_handle;
else if (bt_uuid_cmp(&uuid, &proto_mode_uuid) == 0)
proto_mode_handle = chr->value_handle;
@@ -421,10 +451,6 @@ static void char_discovered_cb(GSList *chars, guint8 status, gpointer user_data)
if (info_handle)
gatt_read_char(hogdev->attrib, info_handle, 0,
info_read_cb, hogdev);
-
- if (map_handle)
- gatt_read_char(hogdev->attrib, map_handle, 0,
- report_map_read_cb, hogdev);
}
static void output_written_cb(guint8 status, const guint8 *pdu,
--
1.7.11.2
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