bluetooth: controller: Support Shorter Connection Intervals commands

Add support for HCI commands related to Shorter Connection Intervals
to the SoftDevice Controller HCI driver.
hci_internal_supported_commands update will follow separately.
SDC_HCI_OPCODE_CMD_LE_SET_HOST_FEATURE_V2 is used by SCI tests.

Signed-off-by: Aleksandar Stanoev <aleksandar.stanoev@nordicsemi.no>

Author: alexstanoev-nordic

subsys/bluetooth/controller/Kconfig

@@ -43,6 +43,7 @@ config BT_LL_SOFTDEVICE
 	select BT_CTLR_SUBRATING_SUPPORT
 	select BT_CTLR_EXTENDED_FEAT_SET_SUPPORT
 	select BT_CTLR_FRAME_SPACE_UPDATE_SUPPORT
+	select BT_CTLR_SHORTER_CONNECTION_INTERVALS_SUPPORT
 	select BT_LL_SOFTDEVICE_HEADERS_INCLUDE
 	select MRAM_LATENCY if (SOC_NRF54H20_CPURAD && !MPSL_PM_USE_MRAM_LATENCY_SERVICE)
 	select MRAM_LATENCY_AUTO_REQ if (SOC_NRF54H20_CPURAD && !MPSL_PM_USE_MRAM_LATENCY_SERVICE)
@@ -292,6 +293,19 @@ config BT_CTLR_DF_CONN_CTE_RSP
 config BT_CTLR_ADV_EXT_PDU_EXTRA_DATA_MEMORY
 	bool
 
+config BT_CTLR_SHORTER_CONNECTION_INTERVALS_SUPPORT
+	bool
+
+config BT_CTLR_SHORTER_CONNECTION_INTERVALS
+	bool "Shorter Connection Intervals"
+	depends on BT_CTLR_SHORTER_CONNECTION_INTERVALS_SUPPORT
+	depends on BT_CTLR_EXTENDED_FEAT_SET
+	depends on BT_CTLR_SUBRATING
+	select BT_CTLR_SET_HOST_FEATURE
+	help
+	  Enable support for Bluetooth 6.2 Shorter Connection Intervals
+	  in the controller.
+
 choice BT_LL_SOFTDEVICE_VARIANT
 	prompt "SoftDevice Controller variant"
 	default BT_LL_SOFTDEVICE_MULTIROLE if ((BT_OBSERVER && BT_BROADCASTER) || \
@@ -310,6 +324,7 @@ choice BT_LL_SOFTDEVICE_VARIANT
 						     BT_CTLR_CHANNEL_SOUNDING || \
 						     BT_CTLR_EXTENDED_FEAT_SET || \
 						     BT_CTLR_FRAME_SPACE_UPDATE || \
+						     BT_CTLR_SHORTER_CONNECTION_INTERVALS || \
 						     SOC_COMPATIBLE_NRF5340_CPUNET || \
 						     (SOC_COMPATIBLE_NRF54LX && TRUSTED_EXECUTION_NONSECURE) || \
 						     SOC_SERIES_NRF71X)

subsys/bluetooth/controller/hci_driver.c

@@ -204,6 +204,13 @@ BUILD_ASSERT(!IS_ENABLED(CONFIG_BT_PERIPHERAL) ||
 #define SDC_FRAME_SPACE_UPDATE_MEM_SIZE 0
 #endif
 
+#if defined(CONFIG_BT_CTLR_SHORTER_CONNECTION_INTERVALS)
+#define SDC_SHORTER_CONNECTION_INTERVALS_MEM_SIZE                                                  \
+	SDC_MEM_SHORTER_CONNECTION_INTERVALS(SDC_CENTRAL_COUNT + PERIPHERAL_COUNT)
+#else
+#define SDC_SHORTER_CONNECTION_INTERVALS_MEM_SIZE 0
+#endif
+
 #if defined(CONFIG_BT_CTLR_EXTENDED_FEAT_SET)
 #define SDC_EXTENDED_FEAT_SET_MEM_SIZE                                                             \
 	SDC_MEM_EXTENDED_FEATURE_SET(SDC_CENTRAL_COUNT + PERIPHERAL_COUNT,                         \
@@ -293,6 +300,7 @@ BUILD_ASSERT(!IS_ENABLED(CONFIG_BT_PERIPHERAL) ||
 		      (SDC_SUBRATING_MEM_SIZE) + \
 		      (SDC_SYNC_TRANSFER_MEM_SIZE) + \
 		      (SDC_FRAME_SPACE_UPDATE_MEM_SIZE) + \
+		      (SDC_SHORTER_CONNECTION_INTERVALS_MEM_SIZE) + \
 		      (SDC_EXTENDED_FEAT_SET_MEM_SIZE) + \
 		      (SDC_PERIODIC_ADV_MEM_SIZE) + \
 		      (SDC_PERIODIC_ADV_RSP_MEM_SIZE) + \
@@ -896,6 +904,15 @@ static void configure_supported_features(void)
 		}
 	}
 
+	if (IS_ENABLED(CONFIG_BT_CTLR_SHORTER_CONNECTION_INTERVALS)) {
+		if (IS_ENABLED(CONFIG_BT_CENTRAL)) {
+			sdc_support_shorter_connection_intervals_central();
+		}
+		if (IS_ENABLED(CONFIG_BT_PERIPHERAL)) {
+			sdc_support_shorter_connection_intervals_peripheral();
+		}
+	}
+
 	if (IS_ENABLED(CONFIG_BT_CTLR_EXTENDED_FEAT_SET)) {
 		sdc_support_extended_feature_set();
 	}

subsys/bluetooth/controller/hci_internal.c

@@ -81,6 +81,9 @@ static bool command_generates_command_complete_event(uint16_t hci_opcode)
 #if defined(CONFIG_BT_CTLR_FRAME_SPACE_UPDATE)
 	case SDC_HCI_OPCODE_CMD_LE_FRAME_SPACE_UPDATE:
 #endif /* CONFIG_BT_CTLR_FRAME_SPACE_UPDATE */
+#if defined(CONFIG_BT_CTLR_SHORTER_CONNECTION_INTERVALS)
+	case SDC_HCI_OPCODE_CMD_LE_CONN_RATE_REQUEST:
+#endif /* CONFIG_BT_CTLR_SHORTER_CONNECTION_INTERVALS */
 		return false;
 	default:
 		return true;
@@ -1405,6 +1408,9 @@ static uint8_t le_controller_cmd_put(uint8_t const * const cmd,
 	case SDC_HCI_OPCODE_CMD_LE_SET_HOST_FEATURE:
 		return sdc_hci_cmd_le_set_host_feature(
 			(sdc_hci_cmd_le_set_host_feature_t const *)cmd_params);
+	case SDC_HCI_OPCODE_CMD_LE_SET_HOST_FEATURE_V2:
+		return sdc_hci_cmd_le_set_host_feature_v2(
+			(sdc_hci_cmd_le_set_host_feature_v2_t const *)cmd_params);
 #endif
 
 #if defined(CONFIG_BT_CTLR_SDC_PAWR_ADV)
@@ -1499,6 +1505,29 @@ static uint8_t le_controller_cmd_put(uint8_t const * const cmd,
 		return sdc_hci_cmd_le_frame_space_update((void *)cmd_params);
 #endif /* CONFIG_BT_CTLR_FRAME_SPACE_UPDATE */
 
+#if defined(CONFIG_BT_CTLR_SHORTER_CONNECTION_INTERVALS)
+	case SDC_HCI_OPCODE_CMD_LE_CONN_RATE_REQUEST:
+		return sdc_hci_cmd_le_conn_rate_request((void *)cmd_params);
+#if defined(CONFIG_BT_CENTRAL)
+	case SDC_HCI_OPCODE_CMD_LE_SET_DEFAULT_RATE_PARAMS:
+		return sdc_hci_cmd_le_set_default_rate_params((void *)cmd_params);
+#endif /* CONFIG_BT_CENTRAL */
+	case SDC_HCI_OPCODE_CMD_LE_READ_MIN_SUPPORTED_CONN_INTERVAL: {
+		uint8_t status =
+			sdc_hci_cmd_le_read_min_supported_conn_interval((void *)event_out_params);
+		*param_length_out +=
+			sizeof(sdc_hci_cmd_le_read_min_supported_conn_interval_return_t);
+		if (status == BT_HCI_ERR_SUCCESS) {
+			*param_length_out +=
+				((sdc_hci_cmd_le_read_min_supported_conn_interval_return_t *)
+					 event_out_params)
+					->num_groups *
+				sizeof(sdc_hci_le_read_min_supported_conn_interval_group_t);
+		}
+		return status;
+	}
+#endif /* CONFIG_BT_CTLR_SHORTER_CONNECTION_INTERVALS */
+
 	default:
 		return BT_HCI_ERR_UNKNOWN_CMD;
 	}