diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_rng.c')
-rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_rng.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_rng.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_rng.c new file mode 100644 index 0000000..a3aed4b --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_rng.c @@ -0,0 +1,283 @@ +/** + * Copyright (c) 2016 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#include "sdk_common.h" +#if NRF_MODULE_ENABLED(RNG) + +#include <stdint.h> +#include <stddef.h> +#include "nrf_drv_rng.h" +#include "nordic_common.h" +#include "app_util_platform.h" +#include "nrf_assert.h" +#include "nrf_queue.h" + +#ifdef SOFTDEVICE_PRESENT + #include "nrf_sdh.h" +#endif // SOFTDEVICE_PRESENT + +#define NRF_LOG_MODULE_NAME rng + +#if RNG_CONFIG_LOG_ENABLED + #define NRF_LOG_LEVEL RNG_CONFIG_LOG_LEVEL + #define NRF_LOG_INFO_COLOR RNG_CONFIG_INFO_COLOR + #define NRF_LOG_DEBUG_COLOR RNG_CONFIG_DEBUG_COLOR +#else //RNG_CONFIG_LOG_ENABLED + #define NRF_LOG_LEVEL 0 +#endif //RNG_CONFIG_LOG_ENABLED +#include "nrf_log.h" +NRF_LOG_MODULE_REGISTER(); + +typedef struct +{ + nrfx_drv_state_t state; + nrf_drv_rng_config_t config; +} nrf_drv_rng_cb_t; + +static nrf_drv_rng_cb_t m_rng_cb; +NRF_QUEUE_DEF(uint8_t, m_rand_pool, RNG_CONFIG_POOL_SIZE, NRF_QUEUE_MODE_OVERFLOW); +static const nrf_drv_rng_config_t m_default_config = NRF_DRV_RNG_DEFAULT_CONFIG; + +#ifdef SOFTDEVICE_PRESENT + #define SD_RAND_POOL_SIZE (64) + + STATIC_ASSERT(RNG_CONFIG_POOL_SIZE == SD_RAND_POOL_SIZE); + + #define NRF_DRV_RNG_LOCK() CRITICAL_REGION_ENTER() + #define NRF_DRV_RNG_RELEASE() CRITICAL_REGION_EXIT() + #define NRF_DRV_RNG_SD_IS_ENABLED() nrf_sdh_is_enabled() +#else + #define NRF_DRV_RNG_LOCK() do { } while (0) + #define NRF_DRV_RNG_RELEASE() do { } while (0) + #define NRF_DRV_RNG_SD_IS_ENABLED() false +#endif // SOFTDEVICE_PRESENT + + +static void nrfx_rng_handler(uint8_t rng_val) +{ + NRF_DRV_RNG_LOCK(); + if (!NRF_DRV_RNG_SD_IS_ENABLED()) + { + UNUSED_RETURN_VALUE(nrf_queue_push(&m_rand_pool, &rng_val)); + + if (nrf_queue_is_full(&m_rand_pool)) + { + nrfx_rng_stop(); + } + + NRF_LOG_DEBUG("Event: NRF_RNG_EVENT_VALRDY."); + } + NRF_DRV_RNG_RELEASE(); + +} + +ret_code_t nrf_drv_rng_init(nrf_drv_rng_config_t const * p_config) +{ + ret_code_t err_code = NRF_SUCCESS; + if (m_rng_cb.state != NRFX_DRV_STATE_UNINITIALIZED) + { + return NRF_ERROR_MODULE_ALREADY_INITIALIZED; + } + + if (p_config == NULL) + { + p_config = &m_default_config; + } + m_rng_cb.config = *p_config; + + NRF_DRV_RNG_LOCK(); + + if (!NRF_DRV_RNG_SD_IS_ENABLED()) + { + err_code = nrfx_rng_init(&m_rng_cb.config, nrfx_rng_handler); + if (err_code != NRF_SUCCESS) + { + return err_code; + } + nrfx_rng_start(); + } + m_rng_cb.state = NRFX_DRV_STATE_INITIALIZED; + + NRF_DRV_RNG_RELEASE(); + + return err_code; +} + +void nrf_drv_rng_uninit(void) +{ + ASSERT(m_rng_cb.state == NRFX_DRV_STATE_INITIALIZED); + + NRF_DRV_RNG_LOCK(); + + if (!NRF_DRV_RNG_SD_IS_ENABLED()) + { + nrfx_rng_stop(); + nrfx_rng_uninit(); + } + + NRF_DRV_RNG_RELEASE(); + + nrf_queue_reset(&m_rand_pool); + m_rng_cb.state = NRFX_DRV_STATE_UNINITIALIZED; + NRF_LOG_INFO("Uninitialized."); +} + +void nrf_drv_rng_bytes_available(uint8_t * p_bytes_available) +{ + ASSERT(m_rng_cb.state == NRFX_DRV_STATE_INITIALIZED); + +#ifdef SOFTDEVICE_PRESENT + if (NRF_DRV_RNG_SD_IS_ENABLED()) + { + if (NRF_SUCCESS == sd_rand_application_bytes_available_get(p_bytes_available)) + { + return; + } + } +#endif // SOFTDEVICE_PRESENT + + *p_bytes_available = nrf_queue_utilization_get(&m_rand_pool); + + NRF_LOG_INFO("Function: %s, available bytes: %d.", (uint32_t)__func__, *p_bytes_available); +} + +ret_code_t nrf_drv_rng_rand(uint8_t * p_buff, uint8_t length) +{ + ret_code_t err_code = NRF_SUCCESS; + ASSERT(m_rng_cb.state == NRFX_DRV_STATE_INITIALIZED); + +#ifdef SOFTDEVICE_PRESENT + do { + bool sd_is_enabled; + NRF_DRV_RNG_LOCK(); + sd_is_enabled = NRF_DRV_RNG_SD_IS_ENABLED(); + if (!sd_is_enabled) +#endif // SOFTDEVICE_PRESENT + { + err_code = nrf_queue_read(&m_rand_pool, p_buff, (uint32_t)length); + nrfx_rng_start(); + } +#ifdef SOFTDEVICE_PRESENT + NRF_DRV_RNG_RELEASE(); + + if (sd_is_enabled) + { + err_code = sd_rand_application_vector_get(p_buff, length); + if (err_code == NRF_ERROR_SOC_RAND_NOT_ENOUGH_VALUES) + { + err_code = NRF_ERROR_NOT_FOUND; + } + } + } while (err_code == NRF_ERROR_SOFTDEVICE_NOT_ENABLED); +#endif // SOFTDEVICE_PRESENT + ASSERT((err_code == NRF_SUCCESS) || (err_code == NRF_ERROR_NOT_FOUND)); + +#if defined(RNG_CONFIG_RANDOM_NUMBER_LOG_ENABLED) && (RNG_CONFIG_RANDOM_NUMBER_LOG_ENABLED != 0) + NRF_LOG_DEBUG("Rand buffer data:"); + NRF_LOG_HEXDUMP_DEBUG((uint8_t *)p_buff, length); +#endif // RNG_CONFIG_RANDOM_NUMBER_LOG_ENABLED + NRF_LOG_WARNING("Function: %s, error code: %s.", + (uint32_t)__func__, + (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); + + return err_code; +} + +void nrf_drv_rng_block_rand(uint8_t * p_buff, uint32_t length) +{ + ASSERT(m_rng_cb.state == NRFX_DRV_STATE_INITIALIZED); + + while (length) + { + uint32_t len = MIN(length, RNG_CONFIG_POOL_SIZE); + ret_code_t err_code; + + do { + err_code = nrf_drv_rng_rand(p_buff, len); + } while (err_code != NRF_SUCCESS); + + length -= len; + p_buff += len; + } + + NRF_LOG_DEBUG("Rand buffer data:"); + NRF_LOG_HEXDUMP_DEBUG((uint8_t *)p_buff, length); +} + +#ifdef SOFTDEVICE_PRESENT +static void sd_state_evt_handler(nrf_sdh_state_evt_t state, void * p_context) +{ + switch (state) + { + case NRF_SDH_EVT_STATE_ENABLE_PREPARE: + if (m_rng_cb.state == NRFX_DRV_STATE_INITIALIZED) + { + nrfx_rng_stop(); + nrfx_rng_uninit(); + } + break; + + case NRF_SDH_EVT_STATE_DISABLED: + NRF_DRV_RNG_LOCK(); + if (m_rng_cb.state == NRFX_DRV_STATE_INITIALIZED) + { + ret_code_t err_code = nrfx_rng_init(&m_rng_cb.config, nrfx_rng_handler); + if (err_code != NRF_SUCCESS) + { + ASSERT(false); + } + nrfx_rng_start(); + } + NRF_DRV_RNG_RELEASE(); + break; + + default: + break; + } +} + +NRF_SDH_STATE_OBSERVER(m_sd_state_observer, RNG_CONFIG_STATE_OBSERVER_PRIO) = +{ + .handler = sd_state_evt_handler, + .p_context = NULL, +}; + +#endif // SOFTDEVICE_PRESENT + +#endif // NRF_MODULE_ENABLED(RNG) |