Bluetooth: Make inquiry_cache_flush non-static

In order to use HCI request framework in start_discovery, we'll need
to call inquiry_cache_flush in mgmt.c. Therefore, this patch adds the
hci_ prefix to inquiry_cache_flush and makes it non-static.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Update start_discovery to use HCI request

This patch modifies the start_discovery function so it uses the HCI
request framework.

We build the HCI request according to the discovery type (add inquiry
or LE scan HCI commands) and run the HCI request. We also register
the start_discovery_complete callback which handles mgmt command
complete events for this command. This way, we move all start_
discovery mgmt handling code spread in hci_event.c to a single place
in mgmt.c.

This patch also merges the LE-only and interleaved discovery type
cases since these cases are pretty much the same now.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Remove start discovery handling from hci_event.c

Since all mgmt start discovery command complete events are now handled
in start_discovery_complete callback in mgmt.c, we can remove this
handling from hci_event.c.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Move discovery macros to hci_core.h

Some of discovery macros will be used in hci_core so we need to
define them in common place such as hci_core.h. Thus, this patch
moves discovery macros to hci_core.h and also adds the DISCOV_
prefix to them.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
WIP: Bluetooth: Update le_scan_disable_work to use HCI request

This patch updates the le_scan_disable_work function so it uses the
HCI request framework. All discovery state handling are done in the
in le_scan_disable_work_complete callback.

This patch also changes the le_scan_disable_work behavior by adding
the HCI Inquiry command to the request in case we are running the
interleaved discovery. This way we don't need the extra logic in
hci_cc_le_set_scan_enable to trigger the inquiry procedure and the
mgmt_interleaved_discovery function becomes useless.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Update stop_discovery to use HCI request

This patch modifies the stop_discovery function so it uses the HCI
request framework.

The HCI request is built according to the current discovery state
(inquiry, LE scanning or name resolving) and a complete callback is
register to handle the command complete event for the stop discovery
command. This way, we move all stop_discovery mgmt handling code
spread in hci_event.c to a single place in mgmt.c.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
WIP: Bluetooth: Fix race between stop_discovery and le_scan_disable work

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Remove stop discovery handling from hci_event.c

Since all mgmt stop discovery command complete events are now handled
in stop_discovery_complete callback in mgmt.c, we can remove this
handling from hci_event.c.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Refactor hci_cc_le_set_scan_enable

This patch does a trivial refactoring in hci_cc_le_set_scan_enable.
Since start and stop discovery command failures are now handled in
mgmt layer, the status check became empty. So, we can move it to
outside the switch statement.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Remove LE scan helpers

This patch removes the LE scan helpers hci_le_scan and hci_cancel_
le_scan and all code related to it. We now use the HCI request
framework in device discovery functionality and these helpers are
no longer needed.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Remove inquiry helpers

This patch removes hci_do_inquiry and hci_cancel_inquiry helpers. We
now use the HCI request framework in device discovery functionality
and these helpers are no longer needed.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Remove empty event handler

This patch removes the hci_cc_le_set_scan_param event handler. This
handler became empty because failures of this event are now handled
by start_discovery_complete function in mgmt.c.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Mgmt Device Found Event

We only want to send Mgmt Device Found Events if we are running the
Device Discovery procedure (started by the MGMT Start Discovery
Command). Inquiry or LE scanning triggered by HCI raw interface (e.g.
hcitool) or kernel internals should not send Mgmt Device Found Events.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>