1 // SPDX-License-Identifier: GPL-2.0
6 #include <clk-uclass.h>
9 #include <asm/arch-rockchip/hardware.h>
97 #define trng_write(pdata, pos, val)	writel(val, (pdata)->base + (pos))
98 #define trng_read(pdata, pos)		readl((pdata)->base + (pos))
116 	if (!pdata->hclk.dev)  in rk_rng_do_enable_clk()
119 	ret = enable ? clk_enable(&pdata->hclk) : clk_disable(&pdata->hclk);  in rk_rng_do_enable_clk()
120 	if (ret == -ENOSYS || !ret)  in rk_rng_do_enable_clk()
124 	       enable ? "enable" : "disable", ret);  in rk_rng_do_enable_clk()
145 		return -EINVAL;  in rk_rng_read_regs()
153 		size -= tmp_len;  in rk_rng_read_regs()
154 		count--;  in rk_rng_read_regs()
167 		return -EINVAL;  in cryptov1_rng_read()
171 	       pdata->base + CRYPTO_V1_TRNG_CTRL);  in cryptov1_rng_read()
173 	rk_clrsetreg(pdata->base + CRYPTO_V1_CTRL, CRYPTO_V1_RNG_START,  in cryptov1_rng_read()
176 	retval = readl_poll_timeout(pdata->base + CRYPTO_V1_CTRL, reg,  in cryptov1_rng_read()
182 	rk_rng_read_regs(pdata->base + CRYPTO_V1_TRNG_DOUT_0, data, len);  in cryptov1_rng_read()
186 	rk_clrreg(pdata->base + CRYPTO_V1_CTRL, CRYPTO_V1_RNG_START);  in cryptov1_rng_read()
198 		return -EINVAL;  in cryptov2_rng_read()
201 	writel(100, pdata->base + CRYPTO_V2_RNG_SAMPLE_CNT);  in cryptov2_rng_read()
208 	rk_clrsetreg(pdata->base + CRYPTO_V2_RNG_CTL, 0xffff, reg);  in cryptov2_rng_read()
210 	retval = readl_poll_timeout(pdata->base + CRYPTO_V2_RNG_CTL, reg,  in cryptov2_rng_read()
216 	rk_rng_read_regs(pdata->base + CRYPTO_V2_RNG_DOUT_0, data, len);  in cryptov2_rng_read()
220 	rk_clrreg(pdata->base + CRYPTO_V2_RNG_CTL, 0xffff);  in cryptov2_rng_read()
235 		return -EFAULT;  in trngv1_init()
239 	readl_poll_timeout(pdata->base + TRNG_V1_ISTAT, status,  in trngv1_init()
246 	/* auto reseed after (auto_reseed_cnt * 16) byte rand generate */  in trngv1_init()
259 		return -EINVAL;  in trngv1_rng_read()
264 	retval = readl_poll_timeout(pdata->base + TRNG_V1_ISTAT, reg,  in trngv1_rng_read()
273 	rk_rng_read_regs(pdata->base + TRNG_V1_RAND0, data, len);  in trngv1_rng_read()
287 	rk_clrreg(pdata->base + RKRNG_CTRL, 0xffff);  in rkrng_init()
302 		return -EINVAL;  in rkrng_rng_read()
308 	rk_clrsetreg(pdata->base + RKRNG_CTRL, 0xffff, reg);  in rkrng_rng_read()
310 	retval = readl_poll_timeout(pdata->base + RKRNG_STATE, reg,  in rkrng_rng_read()
318 	rk_rng_read_regs(pdata->base + RKRNG_DRNG_DATA_0, data, len);  in rkrng_rng_read()
322 	rk_clrreg(pdata->base + RKRNG_CTRL, 0xffff);  in rkrng_rng_read()
333 	int ret = -EIO;  in rockchip_rng_read()
340 	if (!pdata->soc_data || !pdata->soc_data->rk_rng_read)  in rockchip_rng_read()
341 		return -EINVAL;  in rockchip_rng_read()
344 		ret = pdata->soc_data->rk_rng_read(dev, buf, RK_HW_RNG_MAX);  in rockchip_rng_read()
350 		ret = pdata->soc_data->rk_rng_read(dev, buf,  in rockchip_rng_read()
363 	pdata->base = (fdt_addr_t)dev_read_addr_ptr(dev);  in rockchip_rng_ofdata_to_platdata()
364 	if (!pdata->base)  in rockchip_rng_ofdata_to_platdata()
365 		return -ENOMEM;  in rockchip_rng_ofdata_to_platdata()
367 	clk_get_by_index(dev, 0, &pdata->hclk);  in rockchip_rng_ofdata_to_platdata()
377 	pdata->soc_data = (struct rk_rng_soc_data *)dev_get_driver_data(dev);  in rockchip_rng_probe()
379 	if (pdata->soc_data->rk_rng_init)  in rockchip_rng_probe()
380 		ret = pdata->soc_data->rk_rng_init(dev);  in rockchip_rng_probe()
409 		.compatible = "rockchip,cryptov1-rng",
413 		.compatible = "rockchip,cryptov2-rng",
428 	.name = "rockchip-rng",