Bluetooth: drivers: Convert STM32 IPM driver to new API

Convert the ipm_stm32wb.c HCI driver to the new HCI driver API.

Signed-off-by: Johan Hedberg <johan.hedberg@gmail.com>

drivers/bluetooth/hci/Kconfig

@@ -59,6 +59,8 @@ config BT_SPI
 
 config BT_STM32_IPM
 	bool "IPM HCI"
+	default y
+	depends on DT_HAS_ST_STM32WB_RF_ENABLED
 	select USE_STM32_HAL_CORTEX
 	select HAS_STM32LIB
 	help

drivers/bluetooth/hci/ipm_stm32wb.c

@@ -11,7 +11,7 @@
 #include <zephyr/init.h>
 #include <zephyr/sys/util.h>
 #include <zephyr/bluetooth/hci.h>
-#include <zephyr/drivers/bluetooth/hci_driver.h>
+#include <zephyr/drivers/bluetooth.h>
 #include <zephyr/bluetooth/addr.h>
 #include <zephyr/drivers/clock_control/stm32_clock_control.h>
 #include <zephyr/irq.h>
@@ -21,7 +21,11 @@
 #include "shci.h"
 #include "shci_tl.h"
 
-static const struct stm32_pclken clk_cfg[] = STM32_DT_CLOCKS(DT_NODELABEL(ble_rf));
+struct hci_data {
+	bt_hci_recv_t recv;
+};
+
+static const struct stm32_pclken clk_cfg[] = STM32_DT_CLOCKS(DT_DRV_INST(0));
 
 #define POOL_SIZE (CFG_TLBLE_EVT_QUEUE_LENGTH * 4 * \
 		DIVC((sizeof(TL_PacketHeader_t) + TL_BLE_EVENT_FRAME_SIZE), 4))
@@ -156,7 +160,9 @@ void TM_EvtReceivedCb(TL_EvtPacket_t *hcievt)
 
 static void bt_ipm_rx_thread(void *p1, void *p2, void *p3)
 {
-	ARG_UNUSED(p1);
+	const struct device *dev = p1;
+	struct hci_data *hci = dev->data;
+
 	ARG_UNUSED(p2);
 	ARG_UNUSED(p3);
 
@@ -245,7 +251,7 @@ static void bt_ipm_rx_thread(void *p1, void *p2, void *p3)
 
 		TL_MM_EvtDone(hcievt);
 
-		bt_recv(buf);
+		hci->recv(dev, buf);
 end_loop:
 		k_sem_give(&ipm_busy);
 	}
@@ -347,10 +353,12 @@ void transport_init(void)
 	TL_Enable();
 }
 
-static int bt_ipm_send(struct net_buf *buf)
+static int bt_ipm_send(const struct device *dev, struct net_buf *buf)
 {
 	TL_CmdPacket_t *ble_cmd_buff = &BleCmdBuffer;
 
+	ARG_UNUSED(dev);
+
 	k_sem_take(&ipm_busy, K_FOREVER);
 
 	switch (bt_buf_get_type(buf)) {
@@ -534,8 +542,9 @@ static int c2_reset(void)
 	return 0;
 }
 
-static int bt_ipm_open(void)
+static int bt_ipm_open(const struct device *dev, bt_hci_recv_t recv)
 {
+	struct hci_data *hci = dev->data;
 	int err;
 
 	if (!c2_started_flag) {
@@ -553,7 +562,7 @@ static int bt_ipm_open(void)
 	/* Start RX thread */
 	k_thread_create(&ipm_rx_thread_data, ipm_rx_stack,
 			K_KERNEL_STACK_SIZEOF(ipm_rx_stack),
-			bt_ipm_rx_thread, NULL, NULL, NULL,
+			bt_ipm_rx_thread, (void *)dev, NULL, NULL,
 			K_PRIO_COOP(CONFIG_BT_DRIVER_RX_HIGH_PRIO),
 			0, K_NO_WAIT);
 
@@ -564,14 +573,17 @@ static int bt_ipm_open(void)
 	}
 #endif /* CONFIG_BT_HCI_HOST */
 
+	hci->recv = recv;
+
 	LOG_DBG("IPM Channel Open Completed");
 
 	return 0;
 }
 
 #ifdef CONFIG_BT_HCI_HOST
-static int bt_ipm_close(void)
+static int bt_ipm_close(const struct device *dev)
 {
+	struct hci_data *hci = dev->data;
 	int err;
 	struct net_buf *rsp;
 
@@ -590,28 +602,27 @@ static int bt_ipm_close(void)
 
 	k_thread_abort(&ipm_rx_thread_data);
 
+	hci->recv = NULL;
+
 	LOG_DBG("IPM Channel Close Completed");
 
 	return err;
 }
 #endif /* CONFIG_BT_HCI_HOST */
 
-static const struct bt_hci_driver drv = {
-	.name           = "BT IPM",
-	.bus            = BT_HCI_DRIVER_BUS_IPM,
+static const struct bt_hci_driver_api drv = {
 	.open           = bt_ipm_open,
 #ifdef CONFIG_BT_HCI_HOST
 	.close          = bt_ipm_close,
 #endif
 	.send           = bt_ipm_send,
 };
 
-static int _bt_ipm_init(void)
+static int _bt_ipm_init(const struct device *dev)
 {
 	int err;
 
-
-	bt_hci_driver_register(&drv);
+	ARG_UNUSED(dev);
 
 	err = c2_reset();
 	if (err) {
@@ -621,4 +632,11 @@ static int _bt_ipm_init(void)
 	return 0;
 }
 
-SYS_INIT(_bt_ipm_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
+#define HCI_DEVICE_INIT(inst) \
+	static struct hci_data hci_data_##inst = { \
+	}; \
+	DEVICE_DT_INST_DEFINE(inst, _bt_ipm_init, NULL, &hci_data_##inst, NULL, \
+			      POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &drv)
+
+/* Only one instance supported right now */
+HCI_DEVICE_INIT(0)

dts/arm/st/wb/stm32wb.dtsi

@@ -23,6 +23,7 @@
 	chosen {
 		zephyr,entropy = &rng;
 		zephyr,flash-controller = &flash;
+		zephyr,bt-hci = &ble_rf;
 	};
 
 	cpus {

dts/bindings/bluetooth/st,stm32wb-ble-rf.yaml

@@ -6,8 +6,12 @@ description: |
 
 compatible: "st,stm32wb-rf"
 
-include: base.yaml
+include: bt-hci.yaml
 
 properties:
-    clocks:
-      required: true
+  clocks:
+    required: true
+  bt-hci-name:
+    default: "BT IPM"
+  bt-hci-bus:
+    default: "BT_HCI_BUS_IPM"