This patch makes it possible to have UART drivers perform an internal
initialization before calling hci_register_dev. This allows moving a lot
of init code from user space (hciattach) to the kernel side, thereby
creating a more controlled/robust initialization process.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch cleans up and reduces indentation in the hci_uart_tty_close
function.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch adds basic support for parsing and sending Three-wire UART
Link Control packets.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch should complete the necessary code for sending reliable
Three-wire packets.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch adds convenience macros for reading Three-wire header values.
This will help make the code more readable.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch adds initial packed encoding and sending support to the
Three-wire UART HCI transport driver.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch adds basic packet parsing to the Three-wire UART HCI driver
for packets received from the controller.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch adds initial support for reliable packets along with the
necessary retransmission timer for the Three-wire UART HCI driver.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch adds basic state tracking and socket buffer handling to the
Three-wire UART (H5) HCI driver.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch adds the initial skeleton for Three-wire UART (H5) support
and hooks it up to the HCI UART framework.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch is based on a user space (hciops) patch which never made it
upstream but does make sense to include in the mgmt part of the kernel.

(User space) commit message from Dmitriy Paliy:
"
Page scan interval in fast connectable mode is changed from 22.5 msec to
160 msec to perform less aggressive page scanning. This is done
accordingly to controller vendor recommendation.

Primary concern is that current parameters 22.5 interval, 11.25 window,
and interleaved scanning occupy whole radio bandwidth. Changing interval
to 160 msec should be sufficient for both speeding up connection
establishment and leaving space for other activities, like inquiry scan,
e.g.
"

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This change addresses an L2CAP ERTM throughput problem when a remote
device does not fully utilize the available transmit window.

The L2CAP ERTM transmit window size determines the maximum number of
unacked frames that may be outstanding at any time. It is configured
separately for each direction of an ERTM connection. Each side sends a
configuration request with a tx_win field indicating how many unacked
frames it is capable of receiving before sending an ack. The
configuration response's tx_win field shows how many frames the
transmitter will actually send before waiting for an ack.

It's important to trace both the actual transmit window (to check for
validity of incoming frames) and the number of frames that the
transmitter will send before waiting (to send acks at the appropriate
time). Now there are separate tx_win and ack_win values. ack_win is
updated based on configuration responses, and is used to determine
when acks are sent.

Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Improve debug output.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Improve debug output.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

To help debugging printed hex object use standard bluetooth
specifiers in hci_event. The patch changes format from 0x%04x to 0x%4.4x;
print manufacturer id and handle in hex instead of int; print opcode
always in 0x%4.4x format; status in 0x%2.2x.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Correct places where CID and PSM were printed as int. For CID: 0x%4.4x
is used and for PSM: 0x%2.2x.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Avoid unneeded type conversion by correcting type specifiers in debug
statements for L2CAP.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Reuse user_pairing_resp() to send PIN code negative reply

Signed-off-by: Jaganath Kanakkassery <jaganath.k@samsung.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Patch shortens locals scope and adds missing braces. This is a diff
between v1 which was applied and v2 of patch "Bluetooth: btmrvl: Do
not send vendor events to bluetooth stack".

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Since AMP controller is not managed by user space do not shut it down.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Shortening scope shall silence some warnings reported by Geert
Uytterhoeven:

...
drivers/bluetooth/bluecard_cs.c: warning: unused variable 'iobase'
	[-Wunused-variable]
...

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

If AMP controller is first in the list then Bluetooth traffic might
be routed through it (if source is not specified). The patch
prevents this case and also checks that source is BR/EDR.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Fix for warnings below:

...
drivers/bluetooth/bt3c_cs.c:667:20: warning: Using plain integer
	as NULL pointer
drivers/bluetooth/btuart_cs.c:596:20: warning: Using plain integer
	as NULL pointer
...

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Improve the error handling of dtl1_config()

Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Improve debugging of hci_conn objects by: adding print to hci_conn
refcounting, adding object spcifier when missing, change conn to hcon
since conn is heavily used for l2cap_conn objects and this is misleading.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

cmd_status, cmd_complete and mgmt_event functions are executed in
process context and they are not called inside atomic sections. Thus,
they should use GFP_KERNEL for memory allocation instead of GFP_ATOMIC.

Signed-off-by: Andre Guedes <aguedespe@gmail.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

We are allowed to sleep in mgmt_pending_add, so we should use
GFP_KERNEL for memory allocations instead of GFP_ATOMIC.

Signed-off-by: Andre Guedes <aguedespe@gmail.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

add_uuid and get_connections mgmt_handlers are executed by user
threads running in kernel-mode.

Signed-off-by: Andre Guedes <aguedespe@gmail.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Vendor-specific events shall be processed in driver and not sent
to bluetooth stack where they screw up HCI command countings.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Move AUTO_OFF_TIMEOUT to other constants changing name to
HCI_AUTO_OFF_TIMEOUT and convert to jiffies.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Commit af7985bf introduced regression
resulting in complie warnings:

...
net/bluetooth/mgmt.c:3568:27: warning: invalid assignment: |=
net/bluetooth/mgmt.c:3568:27:    left side has type restricted __le32
net/bluetooth/mgmt.c:3568:27:    right side has type int
net/bluetooth/mgmt.c:3570:27: warning: invalid assignment: |=
net/bluetooth/mgmt.c:3570:27:    left side has type restricted __le32
net/bluetooth/mgmt.c:3570:27:    right side has type int
net/bluetooth/mgmt.c:3580:21: warning: cast from restricted __le32
...

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

HCI_Disconnect should only be sent after connection is established.
If connection is not yet established and HCI_Disconnect is called
then disconnection complete will be received with a handle which
does not exist and hence this event will be ignored.
But as mgmt.c will not receive this event, its variable for pending
command is not cleared.This will result in future Disconnect commands
for that BD Address to be blocked with error busy.

Signed-off-by: Vishal Agarwal <vishal.agarwal@stericsson.com>
Acked-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

This patch replaces the magic value of variable 'reason' by the
proper macro.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Change flags field to matches userspace structure.
This field needs to be converted to little endian before forward it.

Signed-off-by: Jefferson Delfes <jefferson.delfes@openbossa.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Move reset function to common initialization section fixing
not setting HCI_RESET flag for amp_init.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Some functions print u16 objects as "0xc03" others as "0x0c03". Patch
ensures that opcodes printed are the in the same format and consistent
with bluetooth code.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Sometimes HCI command sending timeouts and gives error message without
specifying which command causes error. Patch makes sure that opcode
is printed to help debugging.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>