diff options
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.c | 121 |
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"); |