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path: root/target/linux/mcs814x/files-3.3/drivers/char/hw_random/mcs814x-rng.c
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Diffstat (limited to 'target/linux/mcs814x/files-3.3/drivers/char/hw_random/mcs814x-rng.c')
-rw-r--r--target/linux/mcs814x/files-3.3/drivers/char/hw_random/mcs814x-rng.c121
1 files changed, 0 insertions, 121 deletions
diff --git a/target/linux/mcs814x/files-3.3/drivers/char/hw_random/mcs814x-rng.c b/target/linux/mcs814x/files-3.3/drivers/char/hw_random/mcs814x-rng.c
deleted file mode 100644
index 5e3d8f2..0000000
--- a/target/linux/mcs814x/files-3.3/drivers/char/hw_random/mcs814x-rng.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * RNG driver for Moschip MCS814x SoC
- *
- * Copyright 2012 (C), Florian Fainelli <florian@openwrt.org>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/platform_device.h>
-#include <linux/hw_random.h>
-#include <linux/io.h>
-#include <linux/of.h>
-
-#define STAT 0x00
-#define RND 0x04
-
-struct mcs814x_rng_priv {
- void __iomem *regs;
-};
-
-static int mcs814x_rng_data_read(struct hwrng *rng, u32 *buffer)
-{
- struct mcs814x_rng_priv *priv = (struct mcs814x_rng_priv *)rng->priv;
-
- *buffer = readl_relaxed(priv->regs + RND);
-
- return 4;
-}
-
-static int mcs814x_rng_probe(struct platform_device *pdev)
-{
- struct resource *res;
- struct mcs814x_rng_priv *priv;
- struct hwrng *rng;
- int ret;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENODEV;
-
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- ret = -ENOMEM;
- goto out;
- }
-
- rng = kzalloc(sizeof(*rng), GFP_KERNEL);
- if (!rng) {
- ret = -ENOMEM;
- goto out_priv;
- }
-
- platform_set_drvdata(pdev, rng);
- rng->priv = (unsigned long)priv;
- rng->name = pdev->name;
- rng->data_read = mcs814x_rng_data_read;
-
- priv->regs = devm_request_and_ioremap(&pdev->dev, res);
- if (!priv->regs) {
- ret = -ENOMEM;
- goto out_rng;
- }
-
- ret = hwrng_register(rng);
- if (ret) {
- dev_err(&pdev->dev, "failed to register hwrng driver\n");
- goto out;
- }
-
- dev_info(&pdev->dev, "registered\n");
-
- return ret;
-
-out_rng:
- platform_set_drvdata(pdev, NULL);
- kfree(rng);
-out_priv:
- kfree(priv);
-out:
- return ret;
-}
-
-static int mcs814x_rng_remove(struct platform_device *pdev)
-{
- struct hwrng *rng = platform_get_drvdata(pdev);
- struct mcs814x_rng_priv *priv = (struct mcs814x_rng_priv *)rng->priv;
-
- hwrng_unregister(rng);
- kfree(priv);
- kfree(rng);
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static const struct of_device_id mcs814x_rng_ids[] = {
- { .compatible = "moschip,mcs814x-rng", },
- { /* sentinel */ },
-};
-
-static struct platform_driver mcs814x_rng_driver = {
- .driver = {
- .name = "mcs814x-rng",
- .owner = THIS_MODULE,
- .of_match_table = mcs814x_rng_ids,
- },
- .probe = mcs814x_rng_probe,
- .remove = __devexit_p(mcs814x_rng_remove),
-};
-
-module_platform_driver(mcs814x_rng_driver);
-
-MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
-MODULE_DESCRIPTION("H/W Random Number Generator (RNG) for Moschip MCS814x");
-MODULE_LICENSE("GPL");