hisilicon/trng/trng.c

61 	struct hisi_trng *trng;
67 static void hisi_trng_set_seed(struct hisi_trng *trng, const u8 *seed)
79 		writel(val, trng->base + SW_DRBG_SEED(seed_reg));
87 	struct hisi_trng *trng = ctx->trng;
92 		pr_err("slen(%u) is not matched with trng(%d)\n", slen,
97 	writel(0x0, trng->base + SW_DRBG_BLOCKS);
98 	hisi_trng_set_seed(trng, seed);
101 	       trng->base + SW_DRBG_BLOCKS);
102 	writel(0x1, trng->base + SW_DRBG_INIT);
104 	ret = readl_relaxed_poll_timeout(trng->base + SW_DRBG_STATUS,
107 		pr_err("fail to init trng(%d)\n", ret);
116 	struct hisi_trng *trng = ctx->trng;
130 		ret = readl_relaxed_poll_timeout(trng->base + SW_DRBG_STATUS,
138 			data[i] = readl(trng->base + SW_DRBG_DATA(i));
148 		writel(0x1, trng->base + SW_DRBG_GEN);
157 	struct hisi_trng *trng;
161 	list_for_each_entry(trng, &trng_devices.list, list) {
162 		if (!trng->is_used) {
163 			trng->is_used = true;
164 			ctx->trng = trng;
179 	ctx->trng->is_used = false;
185 	struct hisi_trng *trng;
190 	trng = container_of(rng, struct hisi_trng, rng);
193 		ret = readl_poll_timeout(trng->base + HISI_TRNG_REG, val,
229 static void hisi_trng_add_to_list(struct hisi_trng *trng)
232 	list_add_tail(&trng->list, &trng_devices.list);
236 static int hisi_trng_del_from_list(struct hisi_trng *trng)
241 	if (!trng->is_used) {
242 		list_del(&trng->list);
252 	struct hisi_trng *trng;
255 	trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL);
256 	if (!trng)
259 	platform_set_drvdata(pdev, trng);
261 	trng->base = devm_platform_ioremap_resource(pdev, 0);
262 	if (IS_ERR(trng->base))
263 		return PTR_ERR(trng->base);
265 	trng->is_used = false;
266 	trng->ver = readl(trng->base + HISI_TRNG_VERSION);
273 	hisi_trng_add_to_list(trng);
274 	if (trng->ver != HISI_TRNG_VER_V1 &&
285 	trng->rng.name = pdev->name;
286 	trng->rng.read = hisi_trng_read;
287 	trng->rng.quality = HISI_TRNG_QUALITY;
288 	ret = devm_hwrng_register(&pdev->dev, &trng->rng);
297 	if (trng->ver != HISI_TRNG_VER_V1 &&
302 	hisi_trng_del_from_list(trng);
308 	struct hisi_trng *trng = platform_get_drvdata(pdev);
311 	while (hisi_trng_del_from_list(trng))
314 	if (trng->ver != HISI_TRNG_VER_V1 &&
329 		.name	= "hisi-trng-v2",