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-rw-r--r--target/linux/brcm63xx/patches-3.3/105-hw_random-add-Broadcom-BCM63xx-RNG-driver.patch224
1 files changed, 224 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-3.3/105-hw_random-add-Broadcom-BCM63xx-RNG-driver.patch b/target/linux/brcm63xx/patches-3.3/105-hw_random-add-Broadcom-BCM63xx-RNG-driver.patch
new file mode 100644
index 0000000000..a6a2bc0cd5
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.3/105-hw_random-add-Broadcom-BCM63xx-RNG-driver.patch
@@ -0,0 +1,224 @@
+From 21a474b37f905387d8908384a24c13d4f8513113 Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <florian@openwrt.org>
+Date: Wed, 25 Jan 2012 17:40:02 +0100
+Subject: [PATCH 18/63] hw_random: add Broadcom BCM63xx RNG driver
+
+Signed-off-by: Florian Fainelli <florian@openwrt.org>
+---
+ drivers/char/hw_random/Kconfig | 14 +++
+ drivers/char/hw_random/Makefile | 1 +
+ drivers/char/hw_random/bcm63xx-rng.c | 175 ++++++++++++++++++++++++++++++++++
+ 3 files changed, 190 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/char/hw_random/bcm63xx-rng.c
+
+--- a/drivers/char/hw_random/Kconfig
++++ b/drivers/char/hw_random/Kconfig
+@@ -73,6 +73,20 @@ config HW_RANDOM_ATMEL
+
+ If unsure, say Y.
+
++config HW_RANDOM_BCM63XX
++ tristate "Broadcom BCM63xx Random Number Generator support"
++ depends on HW_RANDOM && BCM63XX
++ default HW_RANDOM
++ ---help---
++ This driver provides kernel-side support for the Random Number
++ Generator hardware found on the Broadcom BCM63xx SoCs.
++
++ To compile this driver as a module, choose M here: the
++ module will be called bcm63xx-rng
++
++ If unusure, say Y.
++
++
+ config HW_RANDOM_GEODE
+ tristate "AMD Geode HW Random Number Generator support"
+ depends on HW_RANDOM && X86_32 && PCI
+--- a/drivers/char/hw_random/Makefile
++++ b/drivers/char/hw_random/Makefile
+@@ -8,6 +8,7 @@ obj-$(CONFIG_HW_RANDOM_TIMERIOMEM) += ti
+ obj-$(CONFIG_HW_RANDOM_INTEL) += intel-rng.o
+ obj-$(CONFIG_HW_RANDOM_AMD) += amd-rng.o
+ obj-$(CONFIG_HW_RANDOM_ATMEL) += atmel-rng.o
++obj-$(CONFIG_HW_RANDOM_BCM63XX) += bcm63xx-rng.o
+ obj-$(CONFIG_HW_RANDOM_GEODE) += geode-rng.o
+ obj-$(CONFIG_HW_RANDOM_N2RNG) += n2-rng.o
+ n2-rng-y := n2-drv.o n2-asm.o
+--- /dev/null
++++ b/drivers/char/hw_random/bcm63xx-rng.c
+@@ -0,0 +1,175 @@
++/*
++ * Broadcom BCM63xx Random Number Generator support
++ *
++ * Copyright (C) 2011, Florian Fainelli <florian@openwrt.org>
++ * Copyright (C) 2009, Broadcom Corporation
++ *
++ */
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/io.h>
++#include <linux/err.h>
++#include <linux/clk.h>
++#include <linux/platform_device.h>
++#include <linux/hw_random.h>
++
++#include <bcm63xx_io.h>
++#include <bcm63xx_regs.h>
++
++struct bcm63xx_trng_priv {
++ struct clk *clk;
++ void __iomem *regs;
++};
++
++#define to_trng_priv(rng) ((struct bcm63xx_trng_priv *)rng->priv)
++
++static int bcm63xx_trng_init(struct hwrng *rng)
++{
++ struct bcm63xx_trng_priv *priv = to_trng_priv(rng);
++ u32 val;
++
++ val = bcm_readl(priv->regs + TRNG_CTRL);
++ val |= TRNG_EN;
++ bcm_writel(val, priv->regs + TRNG_CTRL);
++
++ return 0;
++}
++
++static void bcm63xx_trng_cleanup(struct hwrng *rng)
++{
++ struct bcm63xx_trng_priv *priv = to_trng_priv(rng);
++ u32 val;
++
++ val = bcm_readl(priv->regs + TRNG_CTRL);
++ val &= ~TRNG_EN;
++ bcm_writel(val, priv->regs + TRNG_CTRL);
++}
++
++static int bcm63xx_trng_data_present(struct hwrng *rng, int wait)
++{
++ struct bcm63xx_trng_priv *priv = to_trng_priv(rng);
++
++ return bcm_readl(priv->regs + TRNG_STAT) & TRNG_AVAIL_MASK;
++}
++
++static int bcm63xx_trng_data_read(struct hwrng *rng, u32 *data)
++{
++ struct bcm63xx_trng_priv *priv = to_trng_priv(rng);
++
++ *data = bcm_readl(priv->regs + TRNG_DATA);
++
++ return 4;
++}
++
++static int __init bcm63xx_trng_probe(struct platform_device *pdev)
++{
++ struct resource *r;
++ struct clk *clk;
++ int ret;
++ struct bcm63xx_trng_priv *priv;
++ struct hwrng *rng;
++
++ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!r) {
++ dev_err(&pdev->dev, "no iomem resource\n");
++ ret = -ENXIO;
++ goto out;
++ }
++
++ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
++ if (!priv) {
++ dev_err(&pdev->dev, "no memory for private structure\n");
++ ret = -ENOMEM;
++ goto out;
++ }
++
++ rng = kzalloc(sizeof(*rng), GFP_KERNEL);
++ if (!rng) {
++ dev_err(&pdev->dev, "no memory for rng structure\n");
++ ret = -ENOMEM;
++ goto out_free_priv;
++ }
++
++ platform_set_drvdata(pdev, rng);
++ rng->priv = (unsigned long)priv;
++ rng->name = pdev->name;
++ rng->init = bcm63xx_trng_init;
++ rng->cleanup = bcm63xx_trng_cleanup;
++ rng->data_present = bcm63xx_trng_data_present;
++ rng->data_read = bcm63xx_trng_data_read;
++
++ clk = clk_get(&pdev->dev, "ipsec");
++ if (IS_ERR(clk)) {
++ dev_err(&pdev->dev, "no clock for device\n");
++ ret = PTR_ERR(clk);
++ goto out_free_rng;
++ }
++
++ priv->clk = clk;
++
++ if (!devm_request_mem_region(&pdev->dev, r->start,
++ resource_size(r), pdev->name)) {
++ dev_err(&pdev->dev, "request mem failed");
++ ret = -ENOMEM;
++ goto out_free_rng;
++ }
++
++ priv->regs = devm_ioremap_nocache(&pdev->dev, r->start,
++ resource_size(r));
++ if (!priv->regs) {
++ dev_err(&pdev->dev, "ioremap failed");
++ ret = -ENOMEM;
++ goto out_free_rng;
++ }
++
++ clk_enable(clk);
++
++ ret = hwrng_register(rng);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to register rng device\n");
++ goto out_clk_disable;
++ }
++
++ dev_info(&pdev->dev, "registered RNG driver\n");
++
++ return 0;
++
++out_clk_disable:
++ clk_disable(clk);
++out_free_rng:
++ platform_set_drvdata(pdev, NULL);
++ kfree(rng);
++out_free_priv:
++ kfree(priv);
++out:
++ return ret;
++}
++
++static int __devexit bcm63xx_trng_remove(struct platform_device *pdev)
++{
++ struct hwrng *rng = platform_get_drvdata(pdev);
++ struct bcm63xx_trng_priv *priv = to_trng_priv(rng);
++
++ hwrng_unregister(rng);
++ clk_disable(priv->clk);
++ kfree(priv);
++ kfree(rng);
++ platform_set_drvdata(pdev, NULL);
++
++ return 0;
++}
++
++static struct platform_driver bcm63xx_trng_driver = {
++ .probe = bcm63xx_trng_probe,
++ .remove = __devexit_p(bcm63xx_trng_remove),
++ .driver = {
++ .name = "bcm63xx-trng",
++ .owner = THIS_MODULE,
++ },
++};
++
++module_platform_driver(bcm63xx_trng_driver);
++
++MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
++MODULE_DESCRIPTION("Broadcom BCM63xx RNG driver");
++MODULE_LICENSE("GPL");