[PATCH v2 0/6] Add support for IPQ5018 Bluetooth

Hello,

This patch series introduces Bluetooth support for IPQ5018.

Bluetooth firmware is loaded by the host into a dedicated reserved
memory carveout and authenticated by TrustZone. A Secure Channel Manager
(SCM) call safely brings the peripheral core out of reset.

A shared memory ring buffer topology handles runtime data frame
transport between the host APSS and the Bluetooth controller.
An outgoing APCS IPC bit and an incoming GIC interrupt handle
host/guest signaling.

This series has been tested and verified on various IPQ5018 router
boards utilizing firmware extracted from GPL distributions, using both
mdt and mbn file formats.

[   14.781511] Bluetooth: hci0: QCA Product ID   :0x00000016
[   14.781583] Bluetooth: hci0: QCA SOC Version  :0x20180100
[   14.785926] Bluetooth: hci0: QCA ROM Version  :0x00000100
[   14.791546] Bluetooth: hci0: QCA Patch Version:0x00003ded
[   14.796698] Bluetooth: hci0: QCA controller version 0x01000100
[   14.802217] Bluetooth: hci0: QCA Downloading qca/mpnv10.bin
[   16.393850] Bluetooth: hci0: QCA Build Info: BTFW.MAPLE.1.0.0-00102-MPL_ROM_PATCHZ-1

Best regards,
George Moussalem

Signed-off-by: George Moussalem <[email protected]>
---
Changes in v2:
- removed unused struct member btss_reset from m0_btss struct.
- used devm_reset_control_get_exclusive_deasserted to acquire and
  deassert btss_reset in one call. No need to explicitly assert upon
  unbind since devres will handle it.
- As per Bjorn's comments, collapsed the rproc and BT driver into one
  which now handles firmware loading and transport.
- As per further review comments and above change, squashed the two
  devicetree bindings into one to represent the Bluetooth controller
- Added new SCM call to drive Bluetooth power modes. Based on testing on
  more router boards, this is required during start/stop sequences to
  avoid the controller hanging. This is only supported on relatively
  newer QSEE versions, so the SCM call is checked for availability
  before use.
- Refactored resource lifecycle management in the driver so that IRQ and
  work queue are managed at the driver level (probe/remove) while FW
  loading and powering on/off the controller is handled upon hdev
  open/close.
- Consolidated TX send functions for custom IPC and HCI frames into one
  and solved a potential NULL pointer dereference issue under TX
  pressure.
- Replace code to load and initialize firmware metadate by existing
  qcom_mdt_pas_init function. 
- Solved an off byone calculation error in the RX parser.
- Added entry to MAINTAINERS file
- Link to v1: https://lore.kernel.org/r/[email protected]

---
George Moussalem (6):
      dt-bindings: net: bluetooth: Document Qualcomm IPQ5018 Bluetooth controller
      Bluetooth: btqca: Add IPQ5018 support
      firmware: qcom: scm: Add support for setting Bluetooth power modes
      Bluetooth: Introduce Qualcomm IPQ5018 IPC based HCI driver
      arm64: dts: qcom: ipq5018: add nodes required for Bluetooth support
      MAINTAINERS: Add entry for Qualcomm IPQ5018 Bluetooth driver

 .../bindings/net/bluetooth/qcom,ipq5018-bt.yaml    |   86 ++
 MAINTAINERS                                        |    7 +
 arch/arm64/boot/dts/qcom/ipq5018.dtsi              |   25 +-
 drivers/bluetooth/Kconfig                          |   11 +
 drivers/bluetooth/Makefile                         |    1 +
 drivers/bluetooth/btqca.c                          |   16 +
 drivers/bluetooth/btqca.h                          |    3 +
 drivers/bluetooth/btqcomipc.c                      | 1052 ++++++++++++++++++++
 drivers/firmware/qcom/qcom_scm.c                   |   49 +
 drivers/firmware/qcom/qcom_scm.h                   |    1 +
 include/linux/firmware/qcom/qcom_scm.h             |    1 +
 11 files changed, 1251 insertions(+), 1 deletion(-)
---
base-commit: 4d1ab324fcb7d20df5a071edb0304461846fdc12
change-id: 20260625-ipq5018-bluetooth-06ff66c9d753
prerequisite-message-id: <[email protected]>
prerequisite-patch-id: 6ce8686c1683f468d86b4502f5ec9d19c392a382
prerequisite-patch-id: e362f7fcbacff716b7ef720e6780786a7d88c013
prerequisite-patch-id: 9168930e40551e842c8171d5433a6f39ad4b78a4
prerequisite-patch-id: 64fecfbd1e085d7d2ab0ae23295ca34ec8e14c5e
prerequisite-patch-id: 566804aaa690ee9aa285d0fd75fd16d94fbadebf
prerequisite-patch-id: dc18bec338f54b3051f4523f9d1d3c0566a20ccd
prerequisite-patch-id: b6b3eb46429936ab49423d295433daf47981db0f
prerequisite-patch-id: 75caa99e3bbcdf41b6462b9f5f703bea1d4a65fa
prerequisite-patch-id: 35e9968f482f78ca233eb0306d9c5fdbff093175

Best regards,
-- 
George Moussalem <[email protected]>