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54 lines
1.4 KiB
54 lines
1.4 KiB
/* |
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* Copyright (c) 2024 Renesas Electronics Corporation |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#include <soc.h> |
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#include <zephyr/drivers/entropy.h> |
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#include "hw_sce_trng_private.h" |
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#include "hw_sce_private.h" |
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static int entropy_renesas_ra_get_entropy(const struct device *dev, uint8_t *buf, uint16_t len) |
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{ |
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ARG_UNUSED(dev); |
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if (buf == NULL) { |
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return -EINVAL; |
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} |
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while (len > 0) { |
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uint32_t n[4]; |
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const uint32_t to_copy = MIN(sizeof(n), len); |
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if (FSP_SUCCESS != HW_SCE_RNG_Read(n)) { |
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return -ENODATA; |
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} |
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memcpy(buf, n, to_copy); |
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buf += to_copy; |
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len -= to_copy; |
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} |
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return 0; |
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} |
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static DEVICE_API(entropy, entropy_renesas_ra_api) = { |
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.get_entropy = entropy_renesas_ra_get_entropy, |
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}; |
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static int entropy_renesas_ra_init(const struct device *dev) |
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{ |
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HW_SCE_McuSpecificInit(); |
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return 0; |
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} |
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#define RENESAS_RA_ENTROPY_INIT(nodeid) \ |
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DEVICE_DT_DEFINE(nodeid, entropy_renesas_ra_init, NULL, NULL, NULL, PRE_KERNEL_1, \ |
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CONFIG_ENTROPY_INIT_PRIORITY, &entropy_renesas_ra_api) |
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DT_FOREACH_STATUS_OKAY(renesas_ra_rsip_e51a_trng, RENESAS_RA_ENTROPY_INIT) |
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DT_FOREACH_STATUS_OKAY(renesas_ra_sce5_rng, RENESAS_RA_ENTROPY_INIT) |
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DT_FOREACH_STATUS_OKAY(renesas_ra_sce7_rng, RENESAS_RA_ENTROPY_INIT) |
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DT_FOREACH_STATUS_OKAY(renesas_ra_sce9_rng, RENESAS_RA_ENTROPY_INIT) |
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DT_FOREACH_STATUS_OKAY(renesas_ra_trng, RENESAS_RA_ENTROPY_INIT)
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