// SPDX-License-Identifier: GPL-2.0 /* * TRNG driver for the StarFive JH7110 SoC * * Copyright (C) 2022 StarFive Technology Co. */ #include <linux/clk.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/hw_random.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/random.h> #include <linux/reset.h> /* trng register offset */ #define STARFIVE_CTRL … #define STARFIVE_STAT … #define STARFIVE_MODE … #define STARFIVE_SMODE … #define STARFIVE_IE … #define STARFIVE_ISTAT … #define STARFIVE_RAND0 … #define STARFIVE_RAND1 … #define STARFIVE_RAND2 … #define STARFIVE_RAND3 … #define STARFIVE_RAND4 … #define STARFIVE_RAND5 … #define STARFIVE_RAND6 … #define STARFIVE_RAND7 … #define STARFIVE_AUTO_RQSTS … #define STARFIVE_AUTO_AGE … /* CTRL CMD */ #define STARFIVE_CTRL_EXEC_NOP … #define STARFIVE_CTRL_GENE_RANDNUM … #define STARFIVE_CTRL_EXEC_RANDRESEED … /* STAT */ #define STARFIVE_STAT_NONCE_MODE … #define STARFIVE_STAT_R256 … #define STARFIVE_STAT_MISSION_MODE … #define STARFIVE_STAT_SEEDED … #define STARFIVE_STAT_LAST_RESEED(x) … #define STARFIVE_STAT_SRVC_RQST … #define STARFIVE_STAT_RAND_GENERATING … #define STARFIVE_STAT_RAND_SEEDING … /* MODE */ #define STARFIVE_MODE_R256 … /* SMODE */ #define STARFIVE_SMODE_NONCE_MODE … #define STARFIVE_SMODE_MISSION_MODE … #define STARFIVE_SMODE_MAX_REJECTS(x) … /* IE */ #define STARFIVE_IE_RAND_RDY_EN … #define STARFIVE_IE_SEED_DONE_EN … #define STARFIVE_IE_LFSR_LOCKUP_EN … #define STARFIVE_IE_GLBL_EN … #define STARFIVE_IE_ALL … /* ISTAT */ #define STARFIVE_ISTAT_RAND_RDY … #define STARFIVE_ISTAT_SEED_DONE … #define STARFIVE_ISTAT_LFSR_LOCKUP … #define STARFIVE_RAND_LEN … #define to_trng(p) … enum reseed { … }; enum mode { … }; struct starfive_trng { … }; static u16 autoreq; module_param(autoreq, ushort, 0); MODULE_PARM_DESC(…) …; static u16 autoage; module_param(autoage, ushort, 0); MODULE_PARM_DESC(…) …; static inline int starfive_trng_wait_idle(struct starfive_trng *trng) { … } static inline void starfive_trng_irq_mask_clear(struct starfive_trng *trng) { … } static int starfive_trng_cmd(struct starfive_trng *trng, u32 cmd, bool wait) { … } static int starfive_trng_init(struct hwrng *rng) { … } static irqreturn_t starfive_trng_irq(int irq, void *priv) { … } static void starfive_trng_cleanup(struct hwrng *rng) { … } static int starfive_trng_read(struct hwrng *rng, void *buf, size_t max, bool wait) { … } static int starfive_trng_probe(struct platform_device *pdev) { … } static int __maybe_unused starfive_trng_suspend(struct device *dev) { … } static int __maybe_unused starfive_trng_resume(struct device *dev) { … } static const struct dev_pm_ops starfive_trng_pm_ops = …; static const struct of_device_id trng_dt_ids[] __maybe_unused = …; MODULE_DEVICE_TABLE(of, trng_dt_ids); static struct platform_driver starfive_trng_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …;
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