3 int sun4i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed,
6 struct sun4i_ss_alg_template *algt;
7 struct rng_alg *alg = crypto_rng_alg(tfm);
9 algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng);
10 memcpy(algt->ss->seed, seed, slen);
15 int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src,
16 unsigned int slen, u8 *dst, unsigned int dlen)
18 struct sun4i_ss_alg_template *algt;
19 struct rng_alg *alg = crypto_rng_alg(tfm);
22 u32 *data = (u32 *)dst;
23 const u32 mode = SS_OP_PRNG | SS_PRNG_CONTINUE | SS_ENABLED;
25 struct sun4i_ss_ctx *ss;
26 unsigned int todo = (dlen / 4) * 4;
28 algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng);
31 spin_lock_bh(&ss->slock);
33 writel(mode, ss->base + SS_CTL);
37 for (i = 0; i < SS_SEED_LEN / BITS_PER_LONG; i++)
38 writel(ss->seed[i], ss->base + SS_KEY0 + i * 4);
40 /* Read the random data */
41 len = min_t(size_t, SS_DATA_LEN / BITS_PER_BYTE, todo);
42 readsl(ss->base + SS_TXFIFO, data, len / 4);
47 for (i = 0; i < SS_SEED_LEN / BITS_PER_LONG; i++) {
48 v = readl(ss->base + SS_KEY0 + i * 4);
53 writel(0, ss->base + SS_CTL);
54 spin_unlock_bh(&ss->slock);