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-rw-r--r--drivers/char/hw_random/Kconfig2
-rw-r--r--drivers/char/hw_random/atmel-rng.c26
-rw-r--r--drivers/char/hw_random/core.c3
-rw-r--r--drivers/char/hw_random/meson-rng.c2
-rw-r--r--drivers/char/hw_random/msm-rng.c4
-rw-r--r--drivers/char/hw_random/omap-rng.c162
-rw-r--r--drivers/char/hw_random/pic32-rng.c3
-rw-r--r--drivers/char/hw_random/pseries-rng.c5
8 files changed, 151 insertions, 56 deletions
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 200dab5136a7..ceff2fc524b1 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -168,7 +168,7 @@ config HW_RANDOM_IXP4XX
config HW_RANDOM_OMAP
tristate "OMAP Random Number Generator support"
- depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS
+ depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS || ARCH_MVEBU
default HW_RANDOM
---help---
This driver provides kernel-side support for the Random Number
diff --git a/drivers/char/hw_random/atmel-rng.c b/drivers/char/hw_random/atmel-rng.c
index 0fcc9e69a346..661c82cde0f2 100644
--- a/drivers/char/hw_random/atmel-rng.c
+++ b/drivers/char/hw_random/atmel-rng.c
@@ -48,6 +48,16 @@ static int atmel_trng_read(struct hwrng *rng, void *buf, size_t max,
return 0;
}
+static void atmel_trng_enable(struct atmel_trng *trng)
+{
+ writel(TRNG_KEY | 1, trng->base + TRNG_CR);
+}
+
+static void atmel_trng_disable(struct atmel_trng *trng)
+{
+ writel(TRNG_KEY, trng->base + TRNG_CR);
+}
+
static int atmel_trng_probe(struct platform_device *pdev)
{
struct atmel_trng *trng;
@@ -71,7 +81,7 @@ static int atmel_trng_probe(struct platform_device *pdev)
if (ret)
return ret;
- writel(TRNG_KEY | 1, trng->base + TRNG_CR);
+ atmel_trng_enable(trng);
trng->rng.name = pdev->name;
trng->rng.read = atmel_trng_read;
@@ -84,7 +94,7 @@ static int atmel_trng_probe(struct platform_device *pdev)
return 0;
err_register:
- clk_disable(trng->clk);
+ clk_disable_unprepare(trng->clk);
return ret;
}
@@ -94,7 +104,7 @@ static int atmel_trng_remove(struct platform_device *pdev)
hwrng_unregister(&trng->rng);
- writel(TRNG_KEY, trng->base + TRNG_CR);
+ atmel_trng_disable(trng);
clk_disable_unprepare(trng->clk);
return 0;
@@ -105,6 +115,7 @@ static int atmel_trng_suspend(struct device *dev)
{
struct atmel_trng *trng = dev_get_drvdata(dev);
+ atmel_trng_disable(trng);
clk_disable_unprepare(trng->clk);
return 0;
@@ -113,8 +124,15 @@ static int atmel_trng_suspend(struct device *dev)
static int atmel_trng_resume(struct device *dev)
{
struct atmel_trng *trng = dev_get_drvdata(dev);
+ int ret;
- return clk_prepare_enable(trng->clk);
+ ret = clk_prepare_enable(trng->clk);
+ if (ret)
+ return ret;
+
+ atmel_trng_enable(trng);
+
+ return 0;
}
static const struct dev_pm_ops atmel_trng_pm_ops = {
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index d2d2c89de5b4..f9766415ff10 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -92,6 +92,7 @@ static void add_early_randomness(struct hwrng *rng)
mutex_unlock(&reading_mutex);
if (bytes_read > 0)
add_device_randomness(rng_buffer, bytes_read);
+ memset(rng_buffer, 0, size);
}
static inline void cleanup_rng(struct kref *kref)
@@ -287,6 +288,7 @@ static ssize_t rng_dev_read(struct file *filp, char __user *buf,
}
}
out:
+ memset(rng_buffer, 0, rng_buffer_size());
return ret ? : err;
out_unlock_reading:
@@ -425,6 +427,7 @@ static int hwrng_fillfn(void *unused)
/* Outside lock, sure, but y'know: randomness. */
add_hwgenerator_randomness((void *)rng_fillbuf, rc,
rc * current_quality * 8 >> 10);
+ memset(rng_fillbuf, 0, rng_buffer_size());
}
hwrng_fill = NULL;
return 0;
diff --git a/drivers/char/hw_random/meson-rng.c b/drivers/char/hw_random/meson-rng.c
index 58bef39f7286..119d698439ae 100644
--- a/drivers/char/hw_random/meson-rng.c
+++ b/drivers/char/hw_random/meson-rng.c
@@ -110,6 +110,7 @@ static const struct of_device_id meson_rng_of_match[] = {
{ .compatible = "amlogic,meson-rng", },
{},
};
+MODULE_DEVICE_TABLE(of, meson_rng_of_match);
static struct platform_driver meson_rng_driver = {
.probe = meson_rng_probe,
@@ -121,7 +122,6 @@ static struct platform_driver meson_rng_driver = {
module_platform_driver(meson_rng_driver);
-MODULE_ALIAS("platform:meson-rng");
MODULE_DESCRIPTION("Meson H/W Random Number Generator driver");
MODULE_AUTHOR("Lawrence Mok <lawrence.mok@amlogic.com>");
MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
diff --git a/drivers/char/hw_random/msm-rng.c b/drivers/char/hw_random/msm-rng.c
index 96fb986402eb..841fee845ec9 100644
--- a/drivers/char/hw_random/msm-rng.c
+++ b/drivers/char/hw_random/msm-rng.c
@@ -90,10 +90,6 @@ static int msm_rng_read(struct hwrng *hwrng, void *data, size_t max, bool wait)
/* calculate max size bytes to transfer back to caller */
maxsize = min_t(size_t, MAX_HW_FIFO_SIZE, max);
- /* no room for word data */
- if (maxsize < WORD_SZ)
- return 0;
-
ret = clk_prepare_enable(rng->clk);
if (ret)
return ret;
diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c
index f5c26a5f6875..3ad86fdf954e 100644
--- a/drivers/char/hw_random/omap-rng.c
+++ b/drivers/char/hw_random/omap-rng.c
@@ -28,6 +28,7 @@
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/interrupt.h>
+#include <linux/clk.h>
#include <asm/io.h>
@@ -63,10 +64,13 @@
#define OMAP2_RNG_OUTPUT_SIZE 0x4
#define OMAP4_RNG_OUTPUT_SIZE 0x8
+#define EIP76_RNG_OUTPUT_SIZE 0x10
enum {
- RNG_OUTPUT_L_REG = 0,
- RNG_OUTPUT_H_REG,
+ RNG_OUTPUT_0_REG = 0,
+ RNG_OUTPUT_1_REG,
+ RNG_OUTPUT_2_REG,
+ RNG_OUTPUT_3_REG,
RNG_STATUS_REG,
RNG_INTMASK_REG,
RNG_INTACK_REG,
@@ -82,7 +86,7 @@ enum {
};
static const u16 reg_map_omap2[] = {
- [RNG_OUTPUT_L_REG] = 0x0,
+ [RNG_OUTPUT_0_REG] = 0x0,
[RNG_STATUS_REG] = 0x4,
[RNG_CONFIG_REG] = 0x28,
[RNG_REV_REG] = 0x3c,
@@ -90,8 +94,8 @@ static const u16 reg_map_omap2[] = {
};
static const u16 reg_map_omap4[] = {
- [RNG_OUTPUT_L_REG] = 0x0,
- [RNG_OUTPUT_H_REG] = 0x4,
+ [RNG_OUTPUT_0_REG] = 0x0,
+ [RNG_OUTPUT_1_REG] = 0x4,
[RNG_STATUS_REG] = 0x8,
[RNG_INTMASK_REG] = 0xc,
[RNG_INTACK_REG] = 0x10,
@@ -106,6 +110,23 @@ static const u16 reg_map_omap4[] = {
[RNG_SYSCONFIG_REG] = 0x1FE4,
};
+static const u16 reg_map_eip76[] = {
+ [RNG_OUTPUT_0_REG] = 0x0,
+ [RNG_OUTPUT_1_REG] = 0x4,
+ [RNG_OUTPUT_2_REG] = 0x8,
+ [RNG_OUTPUT_3_REG] = 0xc,
+ [RNG_STATUS_REG] = 0x10,
+ [RNG_INTACK_REG] = 0x10,
+ [RNG_CONTROL_REG] = 0x14,
+ [RNG_CONFIG_REG] = 0x18,
+ [RNG_ALARMCNT_REG] = 0x1c,
+ [RNG_FROENABLE_REG] = 0x20,
+ [RNG_FRODETUNE_REG] = 0x24,
+ [RNG_ALARMMASK_REG] = 0x28,
+ [RNG_ALARMSTOP_REG] = 0x2c,
+ [RNG_REV_REG] = 0x7c,
+};
+
struct omap_rng_dev;
/**
* struct omap_rng_pdata - RNG IP block-specific data
@@ -127,6 +148,8 @@ struct omap_rng_dev {
void __iomem *base;
struct device *dev;
const struct omap_rng_pdata *pdata;
+ struct hwrng rng;
+ struct clk *clk;
};
static inline u32 omap_rng_read(struct omap_rng_dev *priv, u16 reg)
@@ -140,41 +163,35 @@ static inline void omap_rng_write(struct omap_rng_dev *priv, u16 reg,
__raw_writel(val, priv->base + priv->pdata->regs[reg]);
}
-static int omap_rng_data_present(struct hwrng *rng, int wait)
+
+static int omap_rng_do_read(struct hwrng *rng, void *data, size_t max,
+ bool wait)
{
struct omap_rng_dev *priv;
- int data, i;
+ int i, present;
priv = (struct omap_rng_dev *)rng->priv;
+ if (max < priv->pdata->data_size)
+ return 0;
+
for (i = 0; i < 20; i++) {
- data = priv->pdata->data_present(priv);
- if (data || !wait)
+ present = priv->pdata->data_present(priv);
+ if (present || !wait)
break;
- /* RNG produces data fast enough (2+ MBit/sec, even
- * during "rngtest" loads, that these delays don't
- * seem to trigger. We *could* use the RNG IRQ, but
- * that'd be higher overhead ... so why bother?
- */
+
udelay(10);
}
- return data;
-}
-
-static int omap_rng_data_read(struct hwrng *rng, u32 *data)
-{
- struct omap_rng_dev *priv;
- u32 data_size, i;
-
- priv = (struct omap_rng_dev *)rng->priv;
- data_size = priv->pdata->data_size;
+ if (!present)
+ return 0;
- for (i = 0; i < data_size / sizeof(u32); i++)
- data[i] = omap_rng_read(priv, RNG_OUTPUT_L_REG + i);
+ memcpy_fromio(data, priv->base + priv->pdata->regs[RNG_OUTPUT_0_REG],
+ priv->pdata->data_size);
if (priv->pdata->regs[RNG_INTACK_REG])
omap_rng_write(priv, RNG_INTACK_REG, RNG_REG_INTACK_RDY_MASK);
- return data_size;
+
+ return priv->pdata->data_size;
}
static int omap_rng_init(struct hwrng *rng)
@@ -193,13 +210,6 @@ static void omap_rng_cleanup(struct hwrng *rng)
priv->pdata->cleanup(priv);
}
-static struct hwrng omap_rng_ops = {
- .name = "omap",
- .data_present = omap_rng_data_present,
- .data_read = omap_rng_data_read,
- .init = omap_rng_init,
- .cleanup = omap_rng_cleanup,
-};
static inline u32 omap2_rng_data_present(struct omap_rng_dev *priv)
{
@@ -231,6 +241,38 @@ static inline u32 omap4_rng_data_present(struct omap_rng_dev *priv)
return omap_rng_read(priv, RNG_STATUS_REG) & RNG_REG_STATUS_RDY;
}
+static int eip76_rng_init(struct omap_rng_dev *priv)
+{
+ u32 val;
+
+ /* Return if RNG is already running. */
+ if (omap_rng_read(priv, RNG_CONTROL_REG) & RNG_CONTROL_ENABLE_TRNG_MASK)
+ return 0;
+
+ /* Number of 512 bit blocks of raw Noise Source output data that must
+ * be processed by either the Conditioning Function or the
+ * SP 800-90 DRBG ‘BC_DF’ functionality to yield a ‘full entropy’
+ * output value.
+ */
+ val = 0x5 << RNG_CONFIG_MIN_REFIL_CYCLES_SHIFT;
+
+ /* Number of FRO samples that are XOR-ed together into one bit to be
+ * shifted into the main shift register
+ */
+ val |= RNG_CONFIG_MAX_REFIL_CYCLES << RNG_CONFIG_MAX_REFIL_CYCLES_SHIFT;
+ omap_rng_write(priv, RNG_CONFIG_REG, val);
+
+ /* Enable all available FROs */
+ omap_rng_write(priv, RNG_FRODETUNE_REG, 0x0);
+ omap_rng_write(priv, RNG_FROENABLE_REG, RNG_REG_FROENABLE_MASK);
+
+ /* Enable TRNG */
+ val = RNG_CONTROL_ENABLE_TRNG_MASK;
+ omap_rng_write(priv, RNG_CONTROL_REG, val);
+
+ return 0;
+}
+
static int omap4_rng_init(struct omap_rng_dev *priv)
{
u32 val;
@@ -300,6 +342,14 @@ static struct omap_rng_pdata omap4_rng_pdata = {
.cleanup = omap4_rng_cleanup,
};
+static struct omap_rng_pdata eip76_rng_pdata = {
+ .regs = (u16 *)reg_map_eip76,
+ .data_size = EIP76_RNG_OUTPUT_SIZE,
+ .data_present = omap4_rng_data_present,
+ .init = eip76_rng_init,
+ .cleanup = omap4_rng_cleanup,
+};
+
static const struct of_device_id omap_rng_of_match[] = {
{
.compatible = "ti,omap2-rng",
@@ -309,6 +359,10 @@ static const struct of_device_id omap_rng_of_match[] = {
.compatible = "ti,omap4-rng",
.data = &omap4_rng_pdata,
},
+ {
+ .compatible = "inside-secure,safexcel-eip76",
+ .data = &eip76_rng_pdata,
+ },
{},
};
MODULE_DEVICE_TABLE(of, omap_rng_of_match);
@@ -327,7 +381,8 @@ static int of_get_omap_rng_device_details(struct omap_rng_dev *priv,
}
priv->pdata = match->data;
- if (of_device_is_compatible(dev->of_node, "ti,omap4-rng")) {
+ if (of_device_is_compatible(dev->of_node, "ti,omap4-rng") ||
+ of_device_is_compatible(dev->of_node, "inside-secure,safexcel-eip76")) {
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "%s: error getting IRQ resource - %d\n",
@@ -343,6 +398,16 @@ static int of_get_omap_rng_device_details(struct omap_rng_dev *priv,
return err;
}
omap_rng_write(priv, RNG_INTMASK_REG, RNG_SHUTDOWN_OFLO_MASK);
+
+ priv->clk = of_clk_get(pdev->dev.of_node, 0);
+ if (IS_ERR(priv->clk) && PTR_ERR(priv->clk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (!IS_ERR(priv->clk)) {
+ err = clk_prepare_enable(priv->clk);
+ if (err)
+ dev_err(&pdev->dev, "unable to enable the clk, "
+ "err = %d\n", err);
+ }
}
return 0;
}
@@ -372,7 +437,11 @@ static int omap_rng_probe(struct platform_device *pdev)
if (!priv)
return -ENOMEM;
- omap_rng_ops.priv = (unsigned long)priv;
+ priv->rng.read = omap_rng_do_read;
+ priv->rng.init = omap_rng_init;
+ priv->rng.cleanup = omap_rng_cleanup;
+
+ priv->rng.priv = (unsigned long)priv;
platform_set_drvdata(pdev, priv);
priv->dev = dev;
@@ -383,6 +452,12 @@ static int omap_rng_probe(struct platform_device *pdev)
goto err_ioremap;
}
+ priv->rng.name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL);
+ if (!priv->rng.name) {
+ ret = -ENOMEM;
+ goto err_ioremap;
+ }
+
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0) {
@@ -394,20 +469,24 @@ static int omap_rng_probe(struct platform_device *pdev)
ret = (dev->of_node) ? of_get_omap_rng_device_details(priv, pdev) :
get_omap_rng_device_details(priv);
if (ret)
- goto err_ioremap;
+ goto err_register;
- ret = hwrng_register(&omap_rng_ops);
+ ret = hwrng_register(&priv->rng);
if (ret)
goto err_register;
- dev_info(&pdev->dev, "OMAP Random Number Generator ver. %02x\n",
+ dev_info(&pdev->dev, "Random Number Generator ver. %02x\n",
omap_rng_read(priv, RNG_REV_REG));
return 0;
err_register:
priv->base = NULL;
+ pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
+
+ if (!IS_ERR(priv->clk))
+ clk_disable_unprepare(priv->clk);
err_ioremap:
dev_err(dev, "initialization failed.\n");
return ret;
@@ -417,13 +496,16 @@ static int omap_rng_remove(struct platform_device *pdev)
{
struct omap_rng_dev *priv = platform_get_drvdata(pdev);
- hwrng_unregister(&omap_rng_ops);
+ hwrng_unregister(&priv->rng);
priv->pdata->cleanup(priv);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
+ if (!IS_ERR(priv->clk))
+ clk_disable_unprepare(priv->clk);
+
return 0;
}
diff --git a/drivers/char/hw_random/pic32-rng.c b/drivers/char/hw_random/pic32-rng.c
index 11dc9b7c09ce..9b5e68a71d01 100644
--- a/drivers/char/hw_random/pic32-rng.c
+++ b/drivers/char/hw_random/pic32-rng.c
@@ -62,9 +62,6 @@ static int pic32_rng_read(struct hwrng *rng, void *buf, size_t max,
u32 t;
unsigned int timeout = RNG_TIMEOUT;
- if (max < 8)
- return 0;
-
do {
t = readl(priv->base + RNGRCNT) & RCNT_MASK;
if (t == 64) {
diff --git a/drivers/char/hw_random/pseries-rng.c b/drivers/char/hw_random/pseries-rng.c
index 63ce51d09af1..d9f46b437cc2 100644
--- a/drivers/char/hw_random/pseries-rng.c
+++ b/drivers/char/hw_random/pseries-rng.c
@@ -28,7 +28,6 @@
static int pseries_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
{
u64 buffer[PLPAR_HCALL_BUFSIZE];
- size_t size = max < 8 ? max : 8;
int rc;
rc = plpar_hcall(H_RANDOM, (unsigned long *)buffer);
@@ -36,10 +35,10 @@ static int pseries_rng_read(struct hwrng *rng, void *data, size_t max, bool wait
pr_err_ratelimited("H_RANDOM call failed %d\n", rc);
return -EIO;
}
- memcpy(data, buffer, size);
+ memcpy(data, buffer, 8);
/* The hypervisor interface returns 64 bits */
- return size;
+ return 8;
}
/**
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-12 22:37:34 +0300