diff options
Diffstat (limited to 'target/linux/mcs814x/files-3.3/drivers/char')
4 files changed, 349 insertions, 0 deletions
diff --git a/target/linux/mcs814x/files-3.3/drivers/char/.svn/entries b/target/linux/mcs814x/files-3.3/drivers/char/.svn/entries new file mode 100644 index 0000000..ed9a638 --- /dev/null +++ b/target/linux/mcs814x/files-3.3/drivers/char/.svn/entries @@ -0,0 +1,31 @@ +10 + +dir +36060 +svn://svn.openwrt.org/openwrt/trunk/target/linux/mcs814x/files-3.3/drivers/char +svn://svn.openwrt.org/openwrt + + + +2012-09-08T09:51:05.580417Z +33330 +florian + + + + + + + + + + + + + + +3c298f89-4303-0410-b956-a3cf2f4a3e73 + +hw_random +dir + diff --git a/target/linux/mcs814x/files-3.3/drivers/char/hw_random/.svn/entries b/target/linux/mcs814x/files-3.3/drivers/char/hw_random/.svn/entries new file mode 100644 index 0000000..c97f9c1 --- /dev/null +++ b/target/linux/mcs814x/files-3.3/drivers/char/hw_random/.svn/entries @@ -0,0 +1,62 @@ +10 + +dir +36060 +svn://svn.openwrt.org/openwrt/trunk/target/linux/mcs814x/files-3.3/drivers/char/hw_random +svn://svn.openwrt.org/openwrt + + + +2012-09-08T09:51:05.580417Z +33330 +florian + + + + + + + + + + + + + + +3c298f89-4303-0410-b956-a3cf2f4a3e73 + +mcs814x-rng.c +file + + + + +2013-03-17T12:12:49.000000Z +da4bce0efca4b05f656e47965e4e16ba +2012-09-08T09:51:05.580417Z +33330 +florian + + + + + + + + + + + + + + + + + + + + + +2724 + diff --git a/target/linux/mcs814x/files-3.3/drivers/char/hw_random/.svn/text-base/mcs814x-rng.c.svn-base b/target/linux/mcs814x/files-3.3/drivers/char/hw_random/.svn/text-base/mcs814x-rng.c.svn-base new file mode 100644 index 0000000..b1e9581 --- /dev/null +++ b/target/linux/mcs814x/files-3.3/drivers/char/hw_random/.svn/text-base/mcs814x-rng.c.svn-base @@ -0,0 +1,128 @@ +/* + * 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; + + if (!devm_request_mem_region(&pdev->dev, + res->start, resource_size(res), + pdev->name)) { + ret = -EBUSY; + goto out_rng; + } + + priv->regs = devm_ioremap(&pdev->dev, res->start, resource_size(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"); 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 new file mode 100644 index 0000000..b1e9581 --- /dev/null +++ b/target/linux/mcs814x/files-3.3/drivers/char/hw_random/mcs814x-rng.c @@ -0,0 +1,128 @@ +/* + * 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; + + if (!devm_request_mem_region(&pdev->dev, + res->start, resource_size(res), + pdev->name)) { + ret = -EBUSY; + goto out_rng; + } + + priv->regs = devm_ioremap(&pdev->dev, res->start, resource_size(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"); |