sun60iw2: bring up AIC8800 UART Bluetooth on the Orange Pi A733 boards (#10149)

The AIC8800D80 combo's BT is UART HCI on ttyS1. Its firmware (loaded over
SDIO by aic8800_bsp) idles the BT core in low-power until BT_WAKE is
asserted, so a plain hciattach times out waiting for HCI_Reset. Assert the
wake via the btlpm sysfs knob, then attach the generic H4 line discipline.

Adds aic8800-bluetooth.service (stock bluez hciattach, no vendor blob),
installed and enabled by the family for boards that set SUN60IW2_UART_BT
(both Orange Pi A733 boards). Validated on the Zero 3W.

Author: shkolnik

config/boards/orangepi4pro.csc

@@ -13,6 +13,9 @@ SUNXI_BOOT0_SDCARD_FEX="${SRC}/packages/blobs/sunxi/sun60iw2/boot0_sdcard_orange
 SUNXI_BOOT0_SPINOR_FEX="${SRC}/packages/blobs/sunxi/sun60iw2/boot0_spinor_orangepi4pro.fex"
 SUNXI_SYS_CONFIG_FEX="${SRC}/packages/blobs/sunxi/sun60iw2/sys_config_orangepi.fex"
 
+# AIC8800D80 combo: BT is UART HCI on ttyS1 and needs userspace bring-up
+SUN60IW2_UART_BT="yes"
+
 # Invalidate U-Boot cache if any of the blobs change
 UBOOT_HASH_EXTRA="$(cat "${SUNXI_BOOT0_SDCARD_FEX}" "${SUNXI_BOOT0_SPINOR_FEX}" "${SUNXI_SYS_CONFIG_FEX}" | sha256sum | cut -d' ' -f1)"
 

config/boards/orangepizero3w.csc

@@ -13,5 +13,8 @@ SUNXI_BOOT0_SDCARD_FEX="${SRC}/packages/blobs/sunxi/sun60iw2/boot0_sdcard_orange
 SUNXI_BOOT0_SPINOR_FEX="${SRC}/packages/blobs/sunxi/sun60iw2/boot0_sdcard_orangepizero3w.fex"
 SUNXI_SYS_CONFIG_FEX="${SRC}/packages/blobs/sunxi/sun60iw2/sys_config_orangepi.fex"
 
+# AIC8800D80 combo: BT is UART HCI on ttyS1 and needs userspace bring-up
+SUN60IW2_UART_BT="yes"
+
 # Invalidate U-Boot cache if any of the blobs change
 UBOOT_HASH_EXTRA="$(cat "${SUNXI_BOOT0_SDCARD_FEX}" "${SUNXI_SYS_CONFIG_FEX}" | sha256sum | cut -d' ' -f1)"

config/sources/families/sun60iw2.conf

@@ -163,6 +163,14 @@ function post_family_tweaks__sun60iw2() {
 	fi
 
 	chroot_sdcard_apt_get_install mtd-utils # MTD flash flash_erase/mtd_debug
+
+	# AIC8800D80 combo: BT is UART HCI on ttyS1 and needs userspace bring-up
+	# (bluez + the wake/hciattach service installed by the family).
+	if [[ "${SUN60IW2_UART_BT:-no}" == "yes" ]]; then
+		chroot_sdcard_apt_get_install bluez rfkill
+		run_host_command_logged install -m 644 "${SRC}/packages/bsp/sunxi/aic8800-bluetooth.service" "${SDCARD}/lib/systemd/system/aic8800-bluetooth.service"
+		chroot_sdcard systemctl --no-reload enable aic8800-bluetooth.service
+	fi
 }
 
 # Add Orange Pi's proprietary kernel headers from bsp/ to the linux-headers package.

packages/bsp/sunxi/aic8800-bluetooth.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=AIC8800 Bluetooth (UART HCI on ttyS1)
+After=bluetooth.service
+Wants=bluetooth.service
+
+[Service]
+# AIC8800D80 BT is UART HCI; the SDIO-loaded combo firmware idles the BT core in
+# low-power until BT_WAKE is asserted, so wake it before attaching the H4 ldisc.
+Type=simple
+ExecStartPre=/usr/sbin/rfkill unblock all
+ExecStartPre=/bin/sh -c 'for i in $(seq 1 10); do [ -e /proc/bluetooth/sleep/btwrite ] && break; sleep 1; done; echo 1 > /proc/bluetooth/sleep/btwrite'
+ExecStart=/usr/bin/hciattach -n -s 1500000 /dev/ttyS1 any 1500000 flow nosleep
+Restart=on-failure
+RestartSec=2
+
+[Install]
+WantedBy=multi-user.target