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zephyr/soc/silabs/silabs_siwx91x/siwg917/nwp.c
Jérôme Pouiller 2bbafa7072 soc: silabs: siwx91x: Allow alternative memory partition 
Chip siwx91x has 672kB of SRAM shared between the Cortex-M4 (Zephyr) and
the NWP (Network Processor). 3 memory configurations are possible for
the Cortex-M4:
  - 196kB
  - 256kB
  - 320kB

Less memory is allocated to Zephyr, more memory is allocated to NWP,
better are the WiFi and BLE performances.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
2025-04-17 17:23:32 +02:00

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7.1 KiB
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/**
* @file
* @brief Network Processor Initialization for SiWx91x.
*
* This file contains the initialization routine for the (ThreadArch) network processor
* on the SiWx91x platform. The component is responsible for setting up the necessary
* hardware and software components to enable network communication.
*
* Copyright (c) 2025 Silicon Laboratories Inc.
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/net/wifi.h>
#include <zephyr/logging/log.h>
#include "nwp.h"
#include "sl_wifi_callback_framework.h"
#ifdef CONFIG_BT_SILABS_SIWX91X
#include "rsi_ble_common_config.h"
#endif
LOG_MODULE_REGISTER(siwx91x_nwp);
BUILD_ASSERT(DT_REG_SIZE(DT_CHOSEN(zephyr_sram)) == KB(196) ||
DT_REG_SIZE(DT_CHOSEN(zephyr_sram)) == KB(256) ||
DT_REG_SIZE(DT_CHOSEN(zephyr_sram)) == KB(320));
int siwg91x_get_nwp_config(int wifi_oper_mode, sl_wifi_device_configuration_t *get_config)
{
sl_wifi_device_configuration_t default_config = {
.band = SL_SI91X_WIFI_BAND_2_4GHZ,
.region_code = DEFAULT_REGION,
.boot_option = LOAD_NWP_FW,
.boot_config = {
.feature_bit_map = SL_SI91X_FEAT_SECURITY_OPEN | SL_SI91X_FEAT_WPS_DISABLE,
.tcp_ip_feature_bit_map = SL_SI91X_TCP_IP_FEAT_EXTENSION_VALID,
.custom_feature_bit_map = SL_SI91X_CUSTOM_FEAT_EXTENSION_VALID,
.ext_custom_feature_bit_map = SL_SI91X_EXT_FEAT_XTAL_CLK,
}
};
sl_si91x_boot_configuration_t *boot_config = &default_config.boot_config;
__ASSERT(get_config, "get_config cannot be NULL");
if (DT_REG_SIZE(DT_CHOSEN(zephyr_sram)) == KB(196)) {
boot_config->ext_custom_feature_bit_map |= SL_SI91X_EXT_FEAT_480K_M4SS_192K;
} else if (DT_REG_SIZE(DT_CHOSEN(zephyr_sram)) == KB(256)) {
boot_config->ext_custom_feature_bit_map |= SL_SI91X_EXT_FEAT_416K_M4SS_256K;
} else if (DT_REG_SIZE(DT_CHOSEN(zephyr_sram)) == KB(320)) {
boot_config->ext_custom_feature_bit_map |= SL_SI91X_EXT_FEAT_352K_M4SS_320K;
} else {
k_panic();
}
if (wifi_oper_mode == SL_SI91X_CLIENT_MODE) {
boot_config->oper_mode = SL_SI91X_CLIENT_MODE;
if (IS_ENABLED(CONFIG_WIFI_SILABS_SIWX91X_ROAMING_USE_DEAUTH)) {
boot_config->custom_feature_bit_map |=
SL_SI91X_CUSTOM_FEAT_ROAM_WITH_DEAUTH_OR_NULL_DATA;
}
if (IS_ENABLED(CONFIG_WIFI_SILABS_SIWX91X) &&
IS_ENABLED(CONFIG_BT_SILABS_SIWX91X)) {
boot_config->coex_mode = SL_SI91X_WLAN_BLE_MODE;
} else if (IS_ENABLED(CONFIG_WIFI_SILABS_SIWX91X)) {
boot_config->coex_mode = SL_SI91X_WLAN_ONLY_MODE;
} else if (IS_ENABLED(CONFIG_BT_SILABS_SIWX91X)) {
boot_config->coex_mode = SL_SI91X_BLE_MODE;
} else {
/*
* Even if neither WiFi or BLE is used we have to specify a Coex mode
*/
boot_config->coex_mode = SL_SI91X_BLE_MODE;
}
#ifdef CONFIG_WIFI_SILABS_SIWX91X
boot_config->ext_tcp_ip_feature_bit_map = SL_SI91X_CONFIG_FEAT_EXTENSION_VALID;
boot_config->config_feature_bit_map = SL_SI91X_ENABLE_ENHANCED_MAX_PSP;
boot_config->ext_custom_feature_bit_map |=
SL_SI91X_EXT_FEAT_IEEE_80211W |
SL_SI91X_EXT_FEAT_FRONT_END_SWITCH_PINS_ULP_GPIO_4_5_0;
#endif
#ifdef CONFIG_BT_SILABS_SIWX91X
boot_config->ext_custom_feature_bit_map |= SL_SI91X_EXT_FEAT_BT_CUSTOM_FEAT_ENABLE;
boot_config->bt_feature_bit_map |=
SL_SI91X_BT_RF_TYPE | SL_SI91X_ENABLE_BLE_PROTOCOL;
boot_config->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;
boot_config->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
} else if (wifi_oper_mode == SL_SI91X_ACCESS_POINT_MODE) {
boot_config->oper_mode = SL_SI91X_ACCESS_POINT_MODE;
boot_config->coex_mode = SL_SI91X_WLAN_ONLY_MODE;
if (IS_ENABLED(CONFIG_BT_SILABS_SIWX91X)) {
LOG_WRN("Bluetooth is not supported in AP mode");
}
} else {
return -EINVAL;
}
#ifdef CONFIG_WIFI_SILABS_SIWX91X
if (IS_ENABLED(CONFIG_WIFI_SILABS_SIWX91X_NET_STACK_OFFLOAD)) {
boot_config->tcp_ip_feature_bit_map |= SL_SI91X_TCP_IP_FEAT_ICMP;
boot_config->ext_tcp_ip_feature_bit_map |= SL_SI91X_EXT_TCP_IP_WINDOW_SCALING;
boot_config->ext_tcp_ip_feature_bit_map |= SL_SI91X_EXT_TCP_IP_TOTAL_SELECTS(10);
if (IS_ENABLED(CONFIG_NET_IPV6)) {
boot_config->tcp_ip_feature_bit_map |= SL_SI91X_TCP_IP_FEAT_IPV6;
if (wifi_oper_mode == SL_SI91X_CLIENT_MODE) {
boot_config->tcp_ip_feature_bit_map |=
SL_SI91X_TCP_IP_FEAT_DHCPV6_CLIENT;
} else if (wifi_oper_mode == SL_SI91X_ACCESS_POINT_MODE) {
boot_config->tcp_ip_feature_bit_map |=
SL_SI91X_TCP_IP_FEAT_DHCPV6_SERVER;
}
}
if (IS_ENABLED(CONFIG_NET_IPV4)) {
if (wifi_oper_mode == SL_SI91X_CLIENT_MODE) {
boot_config->tcp_ip_feature_bit_map |=
SL_SI91X_TCP_IP_FEAT_DHCPV4_CLIENT;
} else if (wifi_oper_mode == SL_SI91X_ACCESS_POINT_MODE) {
boot_config->tcp_ip_feature_bit_map |=
SL_SI91X_TCP_IP_FEAT_DHCPV4_SERVER;
}
}
} else {
boot_config->tcp_ip_feature_bit_map |= SL_SI91X_TCP_IP_FEAT_BYPASS;
}
#endif
memcpy(get_config, &default_config, sizeof(default_config));
return 0;
}
int siwx91x_nwp_mode_switch(uint8_t oper_mode)
{
sl_wifi_device_configuration_t nwp_config;
sl_status_t status;
switch (oper_mode) {
case WIFI_STA_MODE:
siwg91x_get_nwp_config(SL_SI91X_CLIENT_MODE, &nwp_config);
break;
case WIFI_AP_MODE:
siwg91x_get_nwp_config(SL_SI91X_ACCESS_POINT_MODE, &nwp_config);
break;
default:
return -EINVAL;
}
/* FIXME: Calling sl_wifi_deinit() impacts Bluetooth if coexistence is enabled */
status = sl_wifi_deinit();
if (status != SL_STATUS_OK) {
return -ETIMEDOUT;
}
status = sl_wifi_init(&nwp_config, NULL, sl_wifi_default_event_handler);
if (status != SL_STATUS_OK) {
return -ETIMEDOUT;
}
return 0;
}
static int siwg917_nwp_init(void)
{
sl_wifi_device_configuration_t network_config;
sl_status_t status;
siwg91x_get_nwp_config(SL_SI91X_CLIENT_MODE, &network_config);
/* TODO: If sl_net_*_profile() functions will be needed for WiFi then call
* sl_net_set_profile() here. Currently these are unused.
*/
status = sl_wifi_init(&network_config, NULL, sl_wifi_default_event_handler);
if (status != SL_STATUS_OK) {
return -EINVAL;
}
return 0;
}
SYS_INIT(siwg917_nwp_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
/* IRQn 74 is used for communication with co-processor */
Z_ISR_DECLARE(74, 0, IRQ074_Handler, 0);
/* Co-processor will use value stored in IVT to store its stack.
*
* FIXME: We can't use Z_ISR_DECLARE() to declare this entry
* FIXME: Allow to configure size of buffer
*/
static uint8_t __aligned(8) siwg917_nwp_stack[10 * 1024];
static Z_DECL_ALIGN(struct _isr_list) Z_GENERIC_SECTION(.intList)
__used __isr_siwg917_coprocessor_stack_irq = {
.irq = 30,
.flags = ISR_FLAG_DIRECT,
.func = &siwg917_nwp_stack[sizeof(siwg917_nwp_stack) - 1],
};
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