char/hw_random/airoha-trng.c

54 static int airoha_trng_irq_mask(struct airoha_trng *trng)
58 	val = readl(trng->base + TRNG_INTR_EN);
60 	writel(val, trng->base + TRNG_INTR_EN);
65 static int airoha_trng_irq_unmask(struct airoha_trng *trng)
69 	val = readl(trng->base + TRNG_INTR_EN);
71 	writel(val, trng->base + TRNG_INTR_EN);
78 	struct airoha_trng *trng = container_of(rng, struct airoha_trng, rng);
82 	val = readl(trng->base + TRNG_NS_SEK_AND_DAT_EN);
84 	writel(val, trng->base + TRNG_NS_SEK_AND_DAT_EN);
87 	airoha_trng_irq_unmask(trng);
88 	writel(0, trng->base + TRNG_HEALTH_TEST_SW_RST);
90 	ret = wait_for_completion_timeout(&trng->rng_op_done, BUSY_LOOP_TIMEOUT);
92 		dev_err(trng->dev, "Timeout waiting for Health Check\n");
93 		airoha_trng_irq_mask(trng);
98 	val = readl(trng->base + TRNG_HEALTH_TEST_STATUS);
100 		dev_err(trng->dev, "Health Check fail: %s test fail\n",
106 	ret = readl_poll_timeout(trng->base + TRNG_IP_RDY, val,
109 		dev_err(trng->dev, "Timeout waiting for IP ready");
114 	ret = readl_poll_timeout(trng->base + TRNG_IP_RDY, val,
118 		dev_err(trng->dev, "Timeout waiting for IP ready");
127 	struct airoha_trng *trng = container_of(rng, struct airoha_trng, rng);
130 	val = readl(trng->base + TRNG_NS_SEK_AND_DAT_EN);
132 	writel(val, trng->base + TRNG_NS_SEK_AND_DAT_EN);
135 	writel(SW_RST, trng->base + TRNG_HEALTH_TEST_SW_RST);
140 	struct airoha_trng *trng = container_of(rng, struct airoha_trng, rng);
145 	ret = readl_poll_timeout(trng->base + TRNG_HEALTH_TEST_STATUS, status,
148 		dev_err(trng->dev, "Timeout waiting for TRNG RAW Data valid\n");
152 	*data = readl(trng->base + TRNG_RAW_DATA_OUT);
159 	struct airoha_trng *trng = (struct airoha_trng *)priv;
161 	airoha_trng_irq_mask(trng);
163 	complete(&trng->rng_op_done);
171 	struct airoha_trng *trng;
175 	trng = devm_kzalloc(dev, sizeof(*trng), GFP_KERNEL);
176 	if (!trng)
179 	trng->base = devm_platform_ioremap_resource(pdev, 0);
180 	if (IS_ERR(trng->base))
181 		return PTR_ERR(trng->base);
187 	airoha_trng_irq_mask(trng);
189 			       pdev->name, (void *)trng);
195 	init_completion(&trng->rng_op_done);
198 	val = readl(trng->base + TRNG_INTR_EN);
200 	writel(val, trng->base + TRNG_INTR_EN);
203 	val = readl(trng->base + TRNG_NS_SEK_AND_DAT_EN);
205 	writel(val, trng->base + TRNG_NS_SEK_AND_DAT_EN);
208 	writel(SW_RST, trng->base + TRNG_HEALTH_TEST_SW_RST);
210 	trng->dev = dev;
211 	trng->rng.name = pdev->name;
212 	trng->rng.init = airoha_trng_init;
213 	trng->rng.cleanup = airoha_trng_cleanup;
214 	trng->rng.read = airoha_trng_read;
216 	ret = devm_hwrng_register(dev, &trng->rng);
226 	{ .compatible = "airoha,en7581-trng", },
233 		.name = "airoha-trng",