Bluetooth: Add N1 protocol-27 transport and supplier lifetime

Documentation/arch/arm64/aurora-apif-centauri.rst

@@ -50,3 +50,29 @@ stops new transmission. Its key payload is cleared only after the transfer-ring
 tail proves consumption; uncertain ownership keeps backing memory pinned.
 Safe IPC teardown scrubs buffers after verified DMA shutdown. The cleaned
 consumer still needs hardware traffic and suspend/resume qualification.
+
+Bluetooth consumer
+------------------
+
+``CONFIG_BT_HCICENTAURI`` adds the Beta HCI/ACL PCI driver. A managed device
+link requires the Control supplier to have established shared firmware and
+orders removal and suspend against it. The Beta DT node supplies the factory
+``local-mac-address`` in network byte order; no board-name or temporary-address
+fallback selects initialization behavior.
+
+Protocol-27 initialization provisions the address, completes firmware setup
+and supplies a fresh random seed. The connection-command adaptation is enabled
+only after the firmware's capability bit confirms support. Status and connection
+completion events are normalized to the standard HCI command being tracked.
+The firmware duplicate filter is reset in the HCI command-sync path before
+filtered scanning starts; other drivers without that callback keep their
+existing behavior. Standard report lengths are checked before applying the
+matched legacy scan-response fixup.
+
+The driver uses IRQ-triggered work and the original ring geometry. Diagnostic
+capture, unrelated auxiliary rings, manual mode switches and success logging
+are excluded. SCO and ISO delivery are not implemented. Coordinated firmware
+teardown remains unqualified: a published Beta arena stays pinned on detach,
+and rebinding requires a fresh shared-firmware boot. This is not a reset of the
+Wi-Fi function. The cleaned driver still needs hardware HCI/ACL, repeated-scan
+and suspend/resume qualification.

Documentation/devicetree/bindings/net/bluetooth/apple,centauri.yaml

@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/bluetooth/apple,centauri.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple N1 Centauri Beta Bluetooth PCI function
+
+maintainers:
+  - Dj <hey@djdev.me>
+
+description: |
+  PCI function two is the Beta Bluetooth HCI/ACL transport. It depends on
+  the Control function in the same PCI slot, which boots the shared N1
+  firmware using the protocol profile described on its own DT node.
+  The factory address is supplied in network byte order for the firmware
+  address-provisioning command; HCI returns the standard Bluetooth order.
+
+properties:
+  compatible:
+    const: pci106b,1903
+
+  reg:
+    maxItems: 1
+    description: Standard five-cell PCI function address
+
+  local-mac-address:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    minItems: 6
+    maxItems: 6
+    description: Factory Bluetooth public address in network byte order
+
+required:
+  - compatible
+  - reg
+  - local-mac-address
+
+additionalProperties: false

MAINTAINERS

@@ -4372,6 +4372,9 @@ L:	linux-wireless@vger.kernel.org
 S:	Maintained
 F:	Documentation/arch/arm64/aurora-apif-centauri.rst
 F:	Documentation/devicetree/bindings/net/wireless/apple,centauri.yaml
+F:	Documentation/devicetree/bindings/net/bluetooth/apple,centauri.yaml
+F:	drivers/bluetooth/btcentauri.c
+F:	include/linux/apple-centauri.h
 F:	drivers/net/wireless/apple/
 
 AURORA PLATFORM MMIO INTERFACE

arch/arm64/configs/aurora-apif.config

@@ -39,3 +39,5 @@ CONFIG_CFG80211=y
 CONFIG_WLAN_VENDOR_APPLE=y
 CONFIG_APPLE_CENTAURI=y
 CONFIG_APPLE_CENTAURI_WIFI=y
+CONFIG_BT=y
+CONFIG_BT_HCICENTAURI=y

drivers/bluetooth/Kconfig

@@ -533,3 +533,11 @@ config BT_INTEL_PCIE
 	  Say Y here to compiler support for Intel Bluetooth PCIe device into
 	  the kernel or say M to compile it as module (btintel_pcie)
 endmenu
+
+config BT_HCICENTAURI
+	tristate "Apple N1 Centauri Bluetooth"
+	depends on BT && PCI && APPLE_CENTAURI
+	help
+	  Protocol-27 Beta HCI and ACL transport using the shared N1 firmware.
+	  Requires the Control supplier and a DT-provided device address.
+	  SCO and ISO delivery are not implemented by this driver.

drivers/bluetooth/Makefile

@@ -55,3 +55,5 @@ hci_uart-$(CONFIG_BT_HCIUART_AML)	+= hci_aml.o
 hci_uart-objs				:= $(hci_uart-y)
 
 obj-$(CONFIG_BT_MTK7932_PCIE) += mt7932_bt_pcie.o
+
+obj-$(CONFIG_BT_HCICENTAURI) += btcentauri.o