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-rw-r--r--drivers/char/hw_random/Kconfig29
-rw-r--r--drivers/char/hw_random/Makefile2
-rw-r--r--drivers/char/hw_random/exynos-rng.c23
-rw-r--r--drivers/char/hw_random/hisi-rng.c126
-rw-r--r--drivers/char/hw_random/ppc4xx-rng.c147
5 files changed, 162 insertions, 165 deletions
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 67ee8b08a..ac51149e9 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -268,19 +268,6 @@ config HW_RANDOM_NOMADIK
If unsure, say Y.
-config HW_RANDOM_PPC4XX
- tristate "PowerPC 4xx generic true random number generator support"
- depends on PPC && 4xx
- default HW_RANDOM
- ---help---
- This driver provides the kernel-side support for the TRNG hardware
- found in the security function of some PowerPC 4xx SoCs.
-
- To compile this driver as a module, choose M here: the
- module will be called ppc4xx-rng.
-
- If unsure, say N.
-
config HW_RANDOM_PSERIES
tristate "pSeries HW Random Number Generator support"
depends on PPC64 && IBMVIO
@@ -309,7 +296,8 @@ config HW_RANDOM_POWERNV
config HW_RANDOM_EXYNOS
tristate "EXYNOS HW random number generator support"
- depends on ARCH_EXYNOS
+ depends on ARCH_EXYNOS || COMPILE_TEST
+ depends on HAS_IOMEM
default HW_RANDOM
---help---
This driver provides kernel-side support for the Random Number
@@ -333,6 +321,19 @@ config HW_RANDOM_TPM
If unsure, say Y.
+config HW_RANDOM_HISI
+ tristate "Hisilicon Random Number Generator support"
+ depends on HW_RANDOM && ARCH_HISI
+ default HW_RANDOM
+ ---help---
+ This driver provides kernel-side support for the Random Number
+ Generator hardware found on Hisilicon Hip04 and Hip05 SoC.
+
+ To compile this driver as a module, choose M here: the
+ module will be called hisi-rng.
+
+ If unsure, say Y.
+
config HW_RANDOM_MSM
tristate "Qualcomm SoCs Random Number Generator support"
depends on HW_RANDOM && ARCH_QCOM
diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile
index f5a6fa769..63022b49f 100644
--- a/drivers/char/hw_random/Makefile
+++ b/drivers/char/hw_random/Makefile
@@ -22,10 +22,10 @@ obj-$(CONFIG_HW_RANDOM_TX4939) += tx4939-rng.o
obj-$(CONFIG_HW_RANDOM_MXC_RNGA) += mxc-rnga.o
obj-$(CONFIG_HW_RANDOM_OCTEON) += octeon-rng.o
obj-$(CONFIG_HW_RANDOM_NOMADIK) += nomadik-rng.o
-obj-$(CONFIG_HW_RANDOM_PPC4XX) += ppc4xx-rng.o
obj-$(CONFIG_HW_RANDOM_PSERIES) += pseries-rng.o
obj-$(CONFIG_HW_RANDOM_POWERNV) += powernv-rng.o
obj-$(CONFIG_HW_RANDOM_EXYNOS) += exynos-rng.o
+obj-$(CONFIG_HW_RANDOM_HISI) += hisi-rng.o
obj-$(CONFIG_HW_RANDOM_TPM) += tpm-rng.o
obj-$(CONFIG_HW_RANDOM_BCM2835) += bcm2835-rng.o
obj-$(CONFIG_HW_RANDOM_IPROC_RNG200) += iproc-rng200.o
diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c
index b98a141ea..ed44561ea 100644
--- a/drivers/char/hw_random/exynos-rng.c
+++ b/drivers/char/hw_random/exynos-rng.c
@@ -2,7 +2,7 @@
* exynos-rng.c - Random Number Generator driver for the exynos
*
* Copyright (C) 2012 Samsung Electronics
- * Jonghwa Lee <jonghwa3.lee@smasung.com>
+ * Jonghwa Lee <jonghwa3.lee@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -77,7 +77,8 @@ static int exynos_init(struct hwrng *rng)
pm_runtime_get_sync(exynos_rng->dev);
ret = exynos_rng_configure(exynos_rng);
- pm_runtime_put_noidle(exynos_rng->dev);
+ pm_runtime_mark_last_busy(exynos_rng->dev);
+ pm_runtime_put_autosuspend(exynos_rng->dev);
return ret;
}
@@ -118,6 +119,7 @@ static int exynos_rng_probe(struct platform_device *pdev)
{
struct exynos_rng *exynos_rng;
struct resource *res;
+ int ret;
exynos_rng = devm_kzalloc(&pdev->dev, sizeof(struct exynos_rng),
GFP_KERNEL);
@@ -145,7 +147,21 @@ static int exynos_rng_probe(struct platform_device *pdev)
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_enable(&pdev->dev);
- return devm_hwrng_register(&pdev->dev, &exynos_rng->rng);
+ ret = devm_hwrng_register(&pdev->dev, &exynos_rng->rng);
+ if (ret) {
+ pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ }
+
+ return ret;
+}
+
+static int exynos_rng_remove(struct platform_device *pdev)
+{
+ pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
}
static int __maybe_unused exynos_rng_runtime_suspend(struct device *dev)
@@ -205,6 +221,7 @@ static struct platform_driver exynos_rng_driver = {
.of_match_table = exynos_rng_dt_match,
},
.probe = exynos_rng_probe,
+ .remove = exynos_rng_remove,
};
module_platform_driver(exynos_rng_driver);
diff --git a/drivers/char/hw_random/hisi-rng.c b/drivers/char/hw_random/hisi-rng.c
new file mode 100644
index 000000000..40d96572c
--- /dev/null
+++ b/drivers/char/hw_random/hisi-rng.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2016 HiSilicon Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/hw_random.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+
+#define RNG_SEED 0x0
+#define RNG_CTRL 0x4
+ #define RNG_SEED_SEL BIT(2)
+ #define RNG_RING_EN BIT(1)
+ #define RNG_EN BIT(0)
+#define RNG_RAN_NUM 0x10
+#define RNG_PHY_SEED 0x14
+
+#define to_hisi_rng(p) container_of(p, struct hisi_rng, rng)
+
+static int seed_sel;
+module_param(seed_sel, int, S_IRUGO);
+MODULE_PARM_DESC(seed_sel, "Auto reload seed. 0, use LFSR(default); 1, use ring oscillator.");
+
+struct hisi_rng {
+ void __iomem *base;
+ struct hwrng rng;
+};
+
+static int hisi_rng_init(struct hwrng *rng)
+{
+ struct hisi_rng *hrng = to_hisi_rng(rng);
+ int val = RNG_EN;
+ u32 seed;
+
+ /* get a random number as initial seed */
+ get_random_bytes(&seed, sizeof(seed));
+
+ writel_relaxed(seed, hrng->base + RNG_SEED);
+
+ /**
+ * The seed is reload periodically, there are two choice
+ * of seeds, default seed using the value from LFSR, or
+ * will use seed generated by ring oscillator.
+ */
+ if (seed_sel == 1)
+ val |= RNG_RING_EN | RNG_SEED_SEL;
+
+ writel_relaxed(val, hrng->base + RNG_CTRL);
+ return 0;
+}
+
+static void hisi_rng_cleanup(struct hwrng *rng)
+{
+ struct hisi_rng *hrng = to_hisi_rng(rng);
+
+ writel_relaxed(0, hrng->base + RNG_CTRL);
+}
+
+static int hisi_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
+{
+ struct hisi_rng *hrng = to_hisi_rng(rng);
+ u32 *data = buf;
+
+ *data = readl_relaxed(hrng->base + RNG_RAN_NUM);
+ return 4;
+}
+
+static int hisi_rng_probe(struct platform_device *pdev)
+{
+ struct hisi_rng *rng;
+ struct resource *res;
+ int ret;
+
+ rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL);
+ if (!rng)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, rng);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ rng->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(rng->base))
+ return PTR_ERR(rng->base);
+
+ rng->rng.name = pdev->name;
+ rng->rng.init = hisi_rng_init;
+ rng->rng.cleanup = hisi_rng_cleanup;
+ rng->rng.read = hisi_rng_read;
+
+ ret = devm_hwrng_register(&pdev->dev, &rng->rng);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register hwrng\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct of_device_id hisi_rng_dt_ids[] = {
+ { .compatible = "hisilicon,hip04-rng" },
+ { .compatible = "hisilicon,hip05-rng" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, hisi_rng_dt_ids);
+
+static struct platform_driver hisi_rng_driver = {
+ .probe = hisi_rng_probe,
+ .driver = {
+ .name = "hisi-rng",
+ .of_match_table = of_match_ptr(hisi_rng_dt_ids),
+ },
+};
+
+module_platform_driver(hisi_rng_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kefeng Wang <wangkefeng.wang@huawei>");
+MODULE_DESCRIPTION("Hisilicon random number generator driver");
diff --git a/drivers/char/hw_random/ppc4xx-rng.c b/drivers/char/hw_random/ppc4xx-rng.c
deleted file mode 100644
index c0db4387d..000000000
--- a/drivers/char/hw_random/ppc4xx-rng.c
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
- * Generic PowerPC 44x RNG driver
- *
- * Copyright 2011 IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; version 2 of the License.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/hw_random.h>
-#include <linux/delay.h>
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-#include <asm/io.h>
-
-#define PPC4XX_TRNG_DEV_CTRL 0x60080
-
-#define PPC4XX_TRNGE 0x00020000
-#define PPC4XX_TRNG_CTRL 0x0008
-#define PPC4XX_TRNG_CTRL_DALM 0x20
-#define PPC4XX_TRNG_STAT 0x0004
-#define PPC4XX_TRNG_STAT_B 0x1
-#define PPC4XX_TRNG_DATA 0x0000
-
-#define MODULE_NAME "ppc4xx_rng"
-
-static int ppc4xx_rng_data_present(struct hwrng *rng, int wait)
-{
- void __iomem *rng_regs = (void __iomem *) rng->priv;
- int busy, i, present = 0;
-
- for (i = 0; i < 20; i++) {
- busy = (in_le32(rng_regs + PPC4XX_TRNG_STAT) & PPC4XX_TRNG_STAT_B);
- if (!busy || !wait) {
- present = 1;
- break;
- }
- udelay(10);
- }
- return present;
-}
-
-static int ppc4xx_rng_data_read(struct hwrng *rng, u32 *data)
-{
- void __iomem *rng_regs = (void __iomem *) rng->priv;
- *data = in_le32(rng_regs + PPC4XX_TRNG_DATA);
- return 4;
-}
-
-static int ppc4xx_rng_enable(int enable)
-{
- struct device_node *ctrl;
- void __iomem *ctrl_reg;
- int err = 0;
- u32 val;
-
- /* Find the main crypto device node and map it to turn the TRNG on */
- ctrl = of_find_compatible_node(NULL, NULL, "amcc,ppc4xx-crypto");
- if (!ctrl)
- return -ENODEV;
-
- ctrl_reg = of_iomap(ctrl, 0);
- if (!ctrl_reg) {
- err = -ENODEV;
- goto out;
- }
-
- val = in_le32(ctrl_reg + PPC4XX_TRNG_DEV_CTRL);
-
- if (enable)
- val |= PPC4XX_TRNGE;
- else
- val = val & ~PPC4XX_TRNGE;
-
- out_le32(ctrl_reg + PPC4XX_TRNG_DEV_CTRL, val);
- iounmap(ctrl_reg);
-
-out:
- of_node_put(ctrl);
-
- return err;
-}
-
-static struct hwrng ppc4xx_rng = {
- .name = MODULE_NAME,
- .data_present = ppc4xx_rng_data_present,
- .data_read = ppc4xx_rng_data_read,
-};
-
-static int ppc4xx_rng_probe(struct platform_device *dev)
-{
- void __iomem *rng_regs;
- int err = 0;
-
- rng_regs = of_iomap(dev->dev.of_node, 0);
- if (!rng_regs)
- return -ENODEV;
-
- err = ppc4xx_rng_enable(1);
- if (err)
- return err;
-
- out_le32(rng_regs + PPC4XX_TRNG_CTRL, PPC4XX_TRNG_CTRL_DALM);
- ppc4xx_rng.priv = (unsigned long) rng_regs;
-
- err = hwrng_register(&ppc4xx_rng);
-
- return err;
-}
-
-static int ppc4xx_rng_remove(struct platform_device *dev)
-{
- void __iomem *rng_regs = (void __iomem *) ppc4xx_rng.priv;
-
- hwrng_unregister(&ppc4xx_rng);
- ppc4xx_rng_enable(0);
- iounmap(rng_regs);
-
- return 0;
-}
-
-static const struct of_device_id ppc4xx_rng_match[] = {
- { .compatible = "ppc4xx-rng", },
- { .compatible = "amcc,ppc460ex-rng", },
- { .compatible = "amcc,ppc440epx-rng", },
- {},
-};
-MODULE_DEVICE_TABLE(of, ppc4xx_rng_match);
-
-static struct platform_driver ppc4xx_rng_driver = {
- .driver = {
- .name = MODULE_NAME,
- .of_match_table = ppc4xx_rng_match,
- },
- .probe = ppc4xx_rng_probe,
- .remove = ppc4xx_rng_remove,
-};
-
-module_platform_driver(ppc4xx_rng_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Josh Boyer <jwboyer@linux.vnet.ibm.com>");
-MODULE_DESCRIPTION("HW RNG driver for PPC 4xx processors");