linux.git/drivers/bluetooth/btrtl.c, branch v5.3

Bluetooth:: btrtl: Add support for RTL8723DU

2019-07-06T11:00:58+00:00

This device is functionally equivalent to the BT part of the RTL8723DE,
uses the same firmware, but the LMP subversion and HCI revision are unique.

Signed-off-by: Larry Finger 
Signed-off-by: Marcel Holtmann

Bluetooth: btrtl: HCI reset on close for Realtek BT chip

2019-07-06T10:32:50+00:00

Realtek RTL8822BE BT chip on ASUS X420FA cannot be turned on correctly
after on-off several times. Bluetooth daemon sets BT mode failed when
this issue happens. Scanning must be active while turning off for this
bug to be hit.

bluetoothd[1576]: Failed to set mode: Failed (0x03)

If BT is turned off, then turned on again, it works correctly again.

According to the vendor driver, the HCI_QUIRK_RESET_ON_CLOSE flag is set
during probing. So, this patch makes Realtek's BT reset on close to fix
this issue.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=203429
Signed-off-by: Jian-Hong Pan 
Reviewed-by: Daniel Drake 
Signed-off-by: Marcel Holtmann

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

2019-05-30T18:26:37+00:00

Based on 3 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] this program is distributed in the hope that
  it will be useful but without any warranty without even the implied
  warranty of merchantability or fitness for a particular purpose see
  the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] this program is distributed in the hope
  that it will be useful but without any warranty without even the
  implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Allison Randal 
Reviewed-by: Richard Fontana 
Reviewed-by: Kate Stewart 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman

Bluetooth: btrtl: Restore old logic to assume firmware is already loaded

2019-01-28T12:23:59+00:00

Realtek bluetooth may not work after reboot:
[   12.446130] Bluetooth: hci0: RTL: rtl: unknown IC info, lmp subver a99e, hci rev 826c, hci ver 0008

This is a regression introduced by commit 26503ad25de8 ("Bluetooth:
btrtl: split the device initialization into smaller parts"). The new
logic errors out early when no matching IC info can be found, in this
case it means the firmware is already loaded.

So let's assume the firmware is already loaded when we can't find
matching IC info, like the old logic did.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=201921
Fixes: 26503ad25de8 ("Bluetooth: btrtl: split the device initialization into smaller parts")
Cc: stable@vger.kernel.org # 4.19+
Signed-off-by: Kai-Heng Feng 
Signed-off-by: Marcel Holtmann

Bluetooth: btrtl: Add support for RTL8822C with USB interface

2018-09-27T10:44:47+00:00

This device is included in the RTL8822CU combination wifi and BT part,
as well as the BT part of the RTL8822CE.
The necessary firmware has been submitted to the linux-firmware
project.

Signed-off-by: Alex Lu 
Signed-off-by: Larry Finger 
Signed-off-by: Marcel Holtmann

Bluetooth: btrtl: Make array extension_sig static, shrinks object size

2018-09-27T10:26:21+00:00

Don't populate the array extension_sig on the stack but instead make it
static. Makes the object code smaller by 75 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  14325	   4920	      0	  19245	   4b2d	drivers/bluetooth/btrtl.o

After:
   text	   data	    bss	    dec	    hex	filename
  14186	   4984	      0	  19170	   4ae2	drivers/bluetooth/btrtl.o

(gcc version 8.2.0 x86_64)

Signed-off-by: Colin Ian King 
Signed-off-by: Marcel Holtmann

Bluetooth: btrtl: Add support for a config filename postfix

2018-08-03T11:27:46+00:00

The contents of the rtl_bt/rtlXXXX_config.bin file may be board specific
allow the caller of btrtl_initialize to specify a postfix identifying
the board, which if specified will make btrtl_initialize look for
rtl_bt/rtlXXXX_config-.bin instead.

Signed-off-by: Hans de Goede 
Signed-off-by: Marcel Holtmann

Bluetooth: btrtl: add support for the RTL8723BS and RTL8723DS chips

2018-08-03T11:27:46+00:00

The Realtek RTL8723BS and RTL8723DS chipsets are SDIO wifi chips. They
also contain a Bluetooth module which is connected via UART to the host.

Realtek's userspace initialization tool (rtk_hciattach) differentiates
these two via the HCI version and revision returned by the
HCI_OP_READ_LOCAL_VERSION command.
Additionally we apply these checks only the for UART devices. Everything
else is assumed to be a "RTL8723B" which was originally supported by the
driver (communicating via USB).

Signed-off-by: Martin Blumenstingl 
Signed-off-by: Jeremy Cline 
Signed-off-by: Hans de Goede 
Signed-off-by: Marcel Holtmann

Bluetooth: btrtl: add support for retrieving the UART settings

2018-08-03T11:27:46+00:00

The UART settings are embedded in the config blob. This has to be parsed
to successfully initialize the Bluetooth part of the RTL8723BS (which is
an SDIO chip, but the Bluetooth part is connected via UART).

The Realtek "rtl8723bs_bt" and "rtl8723ds_bt" userspace Bluetooth UART
initialization tools (rtk_hciattach) use the following sequence:
- send H5 sync pattern (already supported by hci_h5)
- get LMP version (already supported by btrtl)
- get ROM version (already supported by btrtl)
- load the firmware and config for the current chipset (already
  supported by btrtl)
- read UART settings from the config blob (part of this patch)
- send UART settings via a vendor command to the device (which changes
  the baudrate of the device and enables or disables flow control
  depending on the config)
- change the baudrate and flow control settings on the host
- send the firmware and config blob to the device (already supported by
  btrtl)

Sending the last firmware and config blob download command
(rtl_download_cmd) fails if the UART settings are not updated
beforehand. This is presumably because the device applies the config
right after the firmware and config blob download - which means that at
this point the host is using different UART settings than the device
(which will obviously result in non-working communication).

Signed-off-by: Martin Blumenstingl 
Signed-off-by: Jeremy Cline 
Signed-off-by: Hans de Goede 
Signed-off-by: Marcel Holtmann

Bluetooth: btrtl: Use rtl_dev_err and rtl_dev_info

2018-08-03T11:27:46+00:00

Consistently use rtl_dev_err and rtl_dev_info everywhere for messages.

Signed-off-by: Hans de Goede 
Signed-off-by: Marcel Holtmann