drivers: bluetooth: Introduce SiWx91x HCI driver

Driver was tested with a custom application which enabled the BT_SHELL.
Basic functionalities were verified:
 - Scanning
 - Advertising
 - Connecting

Configuration needed for the test:
 - CONFIG_BT=y
 - CONFIG_BT_PERIPHERAL=y
 - CONFIG_BT_CENTRAL=y
 - CONFIG_BT_SHELL=y
 - CONFIG_SHELL=y

Co-authored-by: Tibor Laczko <tibor.laczko@silabs.com>
Signed-off-by: Tibor Laczko <tibor.laczko@silabs.com>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
This commit is contained in:
Jérôme Pouiller 2025-02-03 14:43:15 +01:00 committed by Benjamin Cabé
commit aa6914dc56
6 changed files with 176 additions and 0 deletions

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@ -40,6 +40,7 @@ zephyr_library_sources_ifdef(CONFIG_BT_STM32WBA hci_stm32wba.c)
zephyr_library_sources_ifdef(CONFIG_BT_STM32WB0 hci_stm32wb0.c)
zephyr_library_sources_ifdef(CONFIG_BT_USERCHAN userchan.c)
zephyr_library_sources_ifdef(CONFIG_BT_SILABS_EFR32 hci_silabs_efr32.c)
zephyr_library_sources_ifdef(CONFIG_BT_SILABS_SIWX91X hci_silabs_siwx91x.c)
zephyr_library_sources_ifdef(CONFIG_BT_PSOC6_BLESS hci_ifx_psoc6_bless.c)
zephyr_library_sources_ifdef(CONFIG_SOC_NRF5340_CPUAPP nrf53_support.c)
zephyr_library_sources_ifdef(CONFIG_BT_AMBIQ_HCI hci_ambiq.c apollox_blue.c)

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@ -136,8 +136,18 @@ config BT_SILABS_EFR32
help
Use Silicon Labs binary Bluetooth library to connect to the
controller.
source "drivers/bluetooth/hci/Kconfig.silabs"
config BT_SILABS_SIWX91X
bool "Silabs SiWx91x Bluetooth interface"
default y
depends on DT_HAS_SILABS_SIWX91X_BT_HCI_ENABLED
select WISECONNECT_NETWORK_STACK
select ENTROPY_GENERATOR
help
Use Silicon Labs Wiseconnect 3.x Bluetooth library to connect to the controller.
config BT_USERCHAN
bool
depends on (BOARD_NATIVE_POSIX || BOARD_NATIVE_SIM)

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@ -0,0 +1,118 @@
/*
* Copyright (c) 2024 Silicon Laboratories Inc.
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/drivers/bluetooth.h>
#define DT_DRV_COMPAT silabs_siwx91x_bt_hci
#define LOG_LEVEL CONFIG_BT_HCI_DRIVER_LOG_LEVEL
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(bt_hci_driver_siwg917);
#include "rsi_ble.h"
static void siwx91x_bt_resp_rcvd(uint16_t status, rsi_ble_event_rcp_rcvd_info_t *resp_buf);
struct hci_data {
bt_hci_recv_t recv;
rsi_data_packet_t rsi_data_packet;
};
static int siwx91x_bt_open(const struct device *dev, bt_hci_recv_t recv)
{
struct hci_data *hci = dev->data;
int status = rsi_ble_enhanced_gap_extended_register_callbacks(RSI_BLE_ON_RCP_EVENT,
(void *)siwx91x_bt_resp_rcvd);
if (!status) {
hci->recv = recv;
}
return status ? -EIO : 0;
}
static int siwx91x_bt_send(const struct device *dev, struct net_buf *buf)
{
struct hci_data *hci = dev->data;
int sc = -EOVERFLOW;
uint8_t packet_type = BT_HCI_H4_NONE;
switch (bt_buf_get_type(buf)) {
case BT_BUF_ACL_OUT:
packet_type = BT_HCI_H4_ACL;
break;
case BT_BUF_CMD:
packet_type = BT_HCI_H4_CMD;
break;
default:
sc = -EINVAL;
break;
}
if ((packet_type != BT_HCI_H4_NONE) && (buf->len < sizeof(hci->rsi_data_packet.data))) {
net_buf_push_u8(buf, packet_type);
memcpy(&hci->rsi_data_packet, buf->data, buf->len);
sc = rsi_bt_driver_send_cmd(RSI_BLE_REQ_HCI_RAW, &hci->rsi_data_packet, NULL);
/* TODO SILABS ZEPHYR Convert to errno. A common function from rsi/sl_status should
* be introduced
*/
if (sc) {
LOG_ERR("BT command send failure: %d", sc);
sc = -EIO;
}
}
net_buf_unref(buf);
return sc;
}
static void siwx91x_bt_resp_rcvd(uint16_t status, rsi_ble_event_rcp_rcvd_info_t *resp_buf)
{
const struct device *dev = DEVICE_DT_GET(DT_DRV_INST(0));
struct hci_data *hci = dev->data;
uint8_t packet_type = BT_HCI_H4_NONE;
size_t len = 0;
struct net_buf *buf = NULL;
/* TODO SILABS ZEPHYR This horror expression is from the WiseConnect from the HCI example...
* No workaround have been found until now.
*/
memcpy(&packet_type, (resp_buf->data - 12), 1);
switch (packet_type) {
case BT_HCI_H4_EVT: {
struct bt_hci_evt_hdr *hdr = (void *)resp_buf->data;
len = hdr->len + sizeof(*hdr);
buf = bt_buf_get_evt(hdr->evt, false, K_FOREVER);
break;
}
case BT_HCI_H4_ACL: {
struct bt_hci_acl_hdr *hdr = (void *)resp_buf->data;
len = hdr->len + sizeof(*hdr);
buf = bt_buf_get_rx(BT_BUF_ACL_IN, K_FOREVER);
break;
}
default:
LOG_ERR("Unknown/Unhandled HCI type: %d", packet_type);
break;
}
if (buf && (len <= net_buf_tailroom(buf))) {
net_buf_add_mem(buf, resp_buf->data, len);
hci->recv(dev, buf);
}
}
static DEVICE_API(bt_hci, siwx91x_api) = {
.open = siwx91x_bt_open,
.send = siwx91x_bt_send,
};
#define HCI_DEVICE_INIT(inst) \
static struct hci_data hci_data_##inst; \
DEVICE_DT_INST_DEFINE(inst, NULL, NULL, &hci_data_##inst, NULL, POST_KERNEL, \
CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &siwx91x_api)
/* Only one instance supported right now */
HCI_DEVICE_INIT(0)

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@ -0,0 +1,13 @@
description: Bluetooth HCI on Silabs boards
compatible: "silabs,siwx91x-bt-hci"
include: bt-hci.yaml
properties:
bt-hci-name:
default: "sl:bt:siwx91x"
bt-hci-bus:
default: "virtual"
bt-hci-quirks:
default: ["no-reset"]

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@ -62,6 +62,20 @@ zephyr_library_sources_ifdef(CONFIG_DMA_SILABS_SIWX91X
${WISECONNECT_DIR}/components/device/silabs/si91x/mcu/drivers/rom_driver/src/rsi_rom_table_si91x.c
)
if(CONFIG_BT_SILABS_SIWX91X)
zephyr_compile_definitions(
SLI_SI91X_ENABLE_BLE
)
zephyr_include_directories(
${WISECONNECT_DIR}/components/device/silabs/si91x/wireless/ble/inc
)
zephyr_library_sources(
${WISECONNECT_DIR}/components/device/silabs/si91x/wireless/ble/src/rsi_bt_ble.c
${WISECONNECT_DIR}/components/device/silabs/si91x/wireless/ble/src/rsi_common_apis.c
${WISECONNECT_DIR}/components/device/silabs/si91x/wireless/ble/src/rsi_utils.c
)
endif() # CONFIG_BT_SILABS_SIWX91X
if(CONFIG_WISECONNECT_NETWORK_STACK)
zephyr_compile_definitions(
SLI_SI91X_ENABLE_OS

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@ -14,6 +14,9 @@
#include "sl_wifi.h"
#include "sl_wifi_callback_framework.h"
#ifdef CONFIG_BT_SILABS_SIWX91X
#include "rsi_ble_common_config.h"
#endif
static int siwg917_nwp_init(void)
{
@ -36,6 +39,23 @@ static int siwg917_nwp_init(void)
}
};
#ifdef CONFIG_BT_SILABS_SIWX91X
cfg->ext_custom_feature_bit_map |= SL_SI91X_EXT_FEAT_BT_CUSTOM_FEAT_ENABLE;
cfg->bt_feature_bit_map |= SL_SI91X_BT_RF_TYPE | SL_SI91X_ENABLE_BLE_PROTOCOL;
cfg->ble_feature_bit_map |= SL_SI91X_BLE_MAX_NBR_PERIPHERALS(RSI_BLE_MAX_NBR_PERIPHERALS) |
SL_SI91X_BLE_MAX_NBR_CENTRALS(RSI_BLE_MAX_NBR_CENTRALS) |
SL_SI91X_BLE_MAX_NBR_ATT_SERV(RSI_BLE_MAX_NBR_ATT_SERV) |
SL_SI91X_BLE_MAX_NBR_ATT_REC(RSI_BLE_MAX_NBR_ATT_REC) |
SL_SI91X_BLE_PWR_INX(RSI_BLE_PWR_INX) |
SL_SI91X_BLE_PWR_SAVE_OPTIONS(RSI_BLE_PWR_SAVE_OPTIONS) |
SL_SI91X_916_BLE_COMPATIBLE_FEAT_ENABLE |
SL_SI91X_FEAT_BLE_CUSTOM_FEAT_EXTENSION_VALID;
cfg->ble_ext_feature_bit_map |= SL_SI91X_BLE_NUM_CONN_EVENTS(RSI_BLE_NUM_CONN_EVENTS) |
SL_SI91X_BLE_NUM_REC_BYTES(RSI_BLE_NUM_REC_BYTES) |
SL_SI91X_BLE_ENABLE_ADV_EXTN |
SL_SI91X_BLE_AE_MAX_ADV_SETS(RSI_BLE_AE_MAX_ADV_SETS);
#endif
/* TODO: If sl_net_*_profile() functions will be needed for WiFi then call
* sl_net_set_profile() here. Currently these are unused.
*/