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drivers/bluetooth/hci: add SiLabs BLE HCI driver
This commit adds the SiLabs Bluetooth HCI driver. It also enables this BLE HCI driver on the efr32bg_sltb010a board. Signed-off-by: Filip Kokosinski <fkokosinski@antmicro.com>
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‎boards/arm/efr32bg_sltb010a/Kconfig.defconfig

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@@ -14,4 +14,21 @@ config CMU_HFXO_FREQ
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config CMU_LFXO_FREQ
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default 32768
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if BT
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config FPU
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default y
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config MINIMAL_LIBC_MALLOC_ARENA_SIZE
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default 8192
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config MAIN_STACK_SIZE
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default 2304
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choice BT_HCI_BUS_TYPE
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default BT_SILABS_HCI
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endchoice
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endif # BT
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endif # BOARD_EFR32BG_SLTB010A

‎boards/arm/efr32bg_sltb010a/doc/index.rst

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@@ -76,6 +76,8 @@ The efr32bg_sltb010a board configuration supports the following hardware feature
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+-----------+------------+-------------------------------------+
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| I2C(M/S) | on-chip | i2c |
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+-----------+------------+-------------------------------------+
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| RADIO | on-chip | bluetooth |
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+-----------+------------+-------------------------------------+
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The default configuration can be found in the defconfig file:
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``boards/arm/efr32bg_sltb010a/efr32bg_sltb010a_defconfig``.
@@ -163,6 +165,25 @@ the following message:
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Hello World! efr32bg_sltb010a
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Bluetooth
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=========
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To use the BLE function, run the command below to retrieve necessary binary
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blobs from the SiLabs HAL repository.
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.. code-block:: console
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west blobs fetch silabs
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Then build the Zephyr kernel and a Bluetooth sample with the following
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command. The :ref:`bluetooth-observer-sample` sample application is used in
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this example.
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.. zephyr-app-commands::
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:zephyr-app: samples/bluetooth/observer
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:board: efr32bg_sltb010a
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:goals: build
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.. _EFR32BG22-SLTB010A Website:
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https://www.silabs.com/development-tools/thunderboard/thunderboard-bg22-kit
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‎drivers/bluetooth/hci/CMakeLists.txt

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Original file line numberDiff line numberDiff line change
@@ -9,3 +9,4 @@ zephyr_library_sources_ifdef(CONFIG_BT_RPMSG rpmsg.c)
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zephyr_library_sources_ifdef(CONFIG_BT_SPI spi.c)
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zephyr_library_sources_ifdef(CONFIG_BT_STM32_IPM ipm_stm32wb.c)
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zephyr_library_sources_ifdef(CONFIG_BT_USERCHAN userchan.c)
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zephyr_library_sources_ifdef(CONFIG_BT_SILABS_HCI slz_hci.c)

‎drivers/bluetooth/hci/Kconfig

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Original file line numberDiff line numberDiff line change
@@ -56,6 +56,18 @@ config BT_STM32_IPM
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help
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TODO
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config BT_SILABS_HCI
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bool "Silicon Labs Bluetooth interface"
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depends on SOC_SERIES_EFR32BG22
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select ENTROPY_GENERATOR
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select MBEDTLS
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select MBEDTLS_PSA_CRYPTO_C
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select MBEDTLS_ENTROPY_ENABLED
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select MBEDTLS_ZEPHYR_ENTROPY
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help
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Use Silicon Labs binary Bluetooth library to connect to the
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controller.
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config BT_USERCHAN
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bool "HCI User Channel based driver"
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depends on BOARD_NATIVE_POSIX
@@ -162,3 +174,11 @@ config BT_DRV_RX_STACK_SIZE
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default 256
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help
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Stack size for the HCI driver's RX thread.
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config BT_SILABS_HCI_BUFFER_MEMORY
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int "Silicon Labs Bluetooth Library memory buffer size"
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depends on BT_SILABS_HCI
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default 6144
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help
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Select the size of allocated memory buffer for the Silicon Labs
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Bluetooth Library.

‎drivers/bluetooth/hci/slz_hci.c

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@@ -0,0 +1,185 @@
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/*
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* Copyright (c) 2023 Antmicro <www.antmicro.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/drivers/bluetooth/hci_driver.h>
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#include <sl_btctrl_linklayer.h>
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#include <sl_hci_common_transport.h>
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#include <pa_conversions_efr32.h>
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#include <sl_bt_ll_zephyr.h>
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#define LOG_LEVEL CONFIG_BT_HCI_DRIVER_LOG_LEVEL
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(bt_hci_driver_slz);
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#define SL_BT_CONFIG_ACCEPT_LIST_SIZE 1
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#define SL_BT_CONFIG_MAX_CONNECTIONS 1
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#define SL_BT_CONFIG_USER_ADVERTISERS 1
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#define SL_BT_CONTROLLER_BUFFER_MEMORY CONFIG_BT_SILABS_HCI_BUFFER_MEMORY
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#define SL_BT_SILABS_LL_STACK_SIZE 1024
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static K_KERNEL_STACK_DEFINE(slz_ll_stack, SL_BT_SILABS_LL_STACK_SIZE);
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static struct k_thread slz_ll_thread;
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void rail_isr_installer(void)
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{
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IRQ_CONNECT(RDMAILBOX_IRQn, 0, RDMAILBOX_IRQHandler, NULL, 0);
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IRQ_CONNECT(RAC_SEQ_IRQn, 0, RAC_SEQ_IRQHandler, NULL, 0);
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IRQ_CONNECT(RAC_RSM_IRQn, 0, RAC_RSM_IRQHandler, NULL, 0);
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IRQ_CONNECT(PROTIMER_IRQn, 0, PROTIMER_IRQHandler, NULL, 0);
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IRQ_CONNECT(MODEM_IRQn, 0, MODEM_IRQHandler, NULL, 0);
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IRQ_CONNECT(FRC_IRQn, 0, FRC_IRQHandler, NULL, 0);
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IRQ_CONNECT(BUFC_IRQn, 0, BUFC_IRQHandler, NULL, 0);
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IRQ_CONNECT(AGC_IRQn, 0, AGC_IRQHandler, NULL, 0);
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}
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/**
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* @brief Transmit HCI message using the currently used transport layer.
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* The HCI calls this function to transmit a full HCI message.
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* @param[in] data Packet type followed by HCI packet data.
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* @param[in] len Length of the `data` parameter
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* @return 0 - on success, or non-zero on failure.
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*/
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uint32_t hci_common_transport_transmit(uint8_t *data, int16_t len)
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{
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struct net_buf *buf;
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uint8_t packet_type = data[0];
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uint8_t flags;
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uint8_t event_code;
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LOG_HEXDUMP_DBG(data, len, "host packet data:");
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/* drop packet type from the frame buffer - it is no longer needed */
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data = &data[1];
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len -= 1;
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switch (packet_type) {
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case h4_event:
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event_code = data[0];
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flags = bt_hci_evt_get_flags(event_code);
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buf = bt_buf_get_evt(event_code, false, K_FOREVER);
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break;
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case h4_acl:
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buf = bt_buf_get_rx(BT_BUF_ACL_IN, K_FOREVER);
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break;
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default:
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LOG_ERR("Unknown HCI type: %d", packet_type);
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return -EINVAL;
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}
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net_buf_add_mem(buf, data, len);
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if ((packet_type == h4_event) && (flags & BT_HCI_EVT_FLAG_RECV_PRIO)) {
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bt_recv_prio(buf);
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} else {
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bt_recv(buf);
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}
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sl_btctrl_hci_transmit_complete(0);
81+
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return 0;
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}
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static int slz_bt_send(struct net_buf *buf)
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{
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int rv = 0;
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switch (bt_buf_get_type(buf)) {
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case BT_BUF_ACL_OUT:
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net_buf_push_u8(buf, h4_acl);
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break;
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case BT_BUF_CMD:
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net_buf_push_u8(buf, h4_command);
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break;
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default:
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rv = -EINVAL;
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goto done;
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}
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rv = hci_common_transport_receive(buf->data, buf->len, true);
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if (!rv) {
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goto done;
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}
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done:
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net_buf_unref(buf);
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return rv;
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}
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static int slz_bt_open(void)
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{
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int ret;
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/* Start RX thread */
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k_thread_create(&slz_ll_thread, slz_ll_stack,
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K_KERNEL_STACK_SIZEOF(slz_ll_stack),
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(k_thread_entry_t)slz_ll_thread_func, NULL, NULL, NULL,
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K_PRIO_COOP(CONFIG_BT_DRIVER_RX_HIGH_PRIO), 0,
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K_NO_WAIT);
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rail_isr_installer();
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sl_rail_util_pa_init();
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/* sl_btctrl_init_mem returns the number of memory buffers allocated */
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ret = sl_btctrl_init_mem(SL_BT_CONTROLLER_BUFFER_MEMORY);
127+
if (!ret) {
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LOG_ERR("Failed to allocate memory %d", ret);
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return -ENOMEM;
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}
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ret = sl_btctrl_init_ll();
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if (ret) {
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LOG_ERR("Bluetooth link layer init failed %d", ret);
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goto deinit;
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}
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sl_btctrl_init_scan();
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sl_btctrl_init_adv();
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sl_btctrl_init_conn();
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sl_btctrl_hci_parser_init_adv();
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sl_btctrl_hci_parser_init_conn();
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ret = sl_btctrl_init_basic(SL_BT_CONFIG_MAX_CONNECTIONS,
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SL_BT_CONFIG_USER_ADVERTISERS,
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SL_BT_CONFIG_ACCEPT_LIST_SIZE);
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if (ret) {
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LOG_ERR("Failed to initialize the controller %d", ret);
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goto deinit;
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}
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sl_bthci_init_upper();
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LOG_DBG("SiLabs BT HCI started");
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return 0;
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deinit:
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sli_btctrl_deinit_mem();
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return ret;
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}
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static const struct bt_hci_driver drv = {
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.name = "sl:bt",
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.bus = BT_HCI_DRIVER_BUS_UART,
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.open = slz_bt_open,
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.send = slz_bt_send,
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.quirks = BT_QUIRK_NO_RESET
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};
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static int slz_bt_init(const struct device *unused)
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{
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ARG_UNUSED(unused);
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int ret;
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ret = bt_hci_driver_register(&drv);
178+
if (ret) {
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LOG_ERR("Failed to register SiLabs BT HCI %d", ret);
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}
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return ret;
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}
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SYS_INIT(slz_bt_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);

‎soc/arm/silabs_exx32/efr32bg22/Kconfig.series

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@@ -18,5 +18,6 @@ config SOC_SERIES_EFR32BG22
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select SOC_GECKO_CMU
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select SOC_GECKO_CORE
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select SOC_GECKO_DEV_INIT
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select SOC_GECKO_SE
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help
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Enable support for EFR32BG22 Blue Gecko MCU series

‎west.yml

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@@ -126,7 +126,7 @@ manifest:
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groups:
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- hal
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- name: hal_silabs
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revision: ed4185ce6f6598892fba6ce1b6dede77b217fb37
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revision: 793db3cb744a6873f5564a901d6c9a1bb7dd5fd8
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path: modules/hal/silabs
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groups:
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- hal

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