brcm2708: add support for 3.10 kernel

Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 37218

1 files changed, 148 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-3.10/007-bcm2708_hw_random-driver.patch b/target/linux/brcm2708/patches-3.10/007-bcm2708_hw_random-driver.patch
new file mode 100644
index 0000000..4805326
--- /dev/null
+++ b/target/linux/brcm2708/patches-3.10/007-bcm2708_hw_random-driver.patch
@@ -0,0 +1,148 @@
+diff -urN linux-3.10/drivers/char/hw_random/bcm2708-rng.c linux-rpi-3.10.y/drivers/char/hw_random/bcm2708-rng.c
+--- linux-3.10/drivers/char/hw_random/bcm2708-rng.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-rpi-3.10.y/drivers/char/hw_random/bcm2708-rng.c	2013-07-06 15:25:50.000000000 +0100
+@@ -0,0 +1,117 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ *    notice, this list of conditions, and the following disclaimer,
++ *    without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ *    notice, this list of conditions and the following disclaimer in the
++ *    documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ *    to endorse or promote products derived from this software without
++ *    specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/hw_random.h>
++#include <linux/printk.h>
++
++#include <asm/io.h>
++#include <mach/hardware.h>
++#include <mach/platform.h>
++
++#define RNG_CTRL		(0x0)
++#define RNG_STATUS		(0x4)
++#define RNG_DATA		(0x8)
++#define RNG_FF_THRESHOLD	(0xc)
++
++/* enable rng */
++#define RNG_RBGEN               0x1
++/* double speed, less random mode */
++#define RNG_RBG2X               0x2
++
++/* the initial numbers generated are "less random" so will be discarded */
++#define RNG_WARMUP_COUNT      0x40000
++
++static int bcm2708_rng_data_read(struct hwrng *rng, u32 *buffer)
++{
++	void __iomem *rng_base = (void __iomem *)rng->priv;
++	unsigned words;
++	/* wait for a random number to be in fifo */
++        do {
++		words = __raw_readl(rng_base + RNG_STATUS)>>24;
++	}
++        while (words == 0);
++	/* read the random number */
++	*buffer = __raw_readl(rng_base + RNG_DATA);
++	return 4;
++}
++
++static struct hwrng bcm2708_rng_ops = {
++	.name		= "bcm2708",
++	.data_read	= bcm2708_rng_data_read,
++};
++
++static int __init bcm2708_rng_init(void)
++{
++	void __iomem *rng_base;
++	int err;
++
++	/* map peripheral */
++	rng_base = ioremap(RNG_BASE, 0x10);
++	pr_info("bcm2708_rng_init=%p\n", rng_base);
++	if (!rng_base) {
++		pr_err("bcm2708_rng_init failed to ioremap\n");
++		return -ENOMEM;
++	}
++	bcm2708_rng_ops.priv = (unsigned long)rng_base;
++	/* register driver */
++	err = hwrng_register(&bcm2708_rng_ops);
++	if (err) {
++		pr_err("bcm2708_rng_init hwrng_register()=%d\n", err);
++		iounmap(rng_base);
++	} else {
++		/* set warm-up count & enable */
++		__raw_writel(RNG_WARMUP_COUNT, rng_base + RNG_STATUS);
++		__raw_writel(RNG_RBGEN, rng_base + RNG_CTRL);
++	}
++	return err;
++}
++
++static void __exit bcm2708_rng_exit(void)
++{
++	void __iomem *rng_base = (void __iomem *)bcm2708_rng_ops.priv;
++	pr_info("bcm2708_rng_exit\n");
++	/* disable rng hardware */
++	__raw_writel(0, rng_base + RNG_CTRL);
++	/* unregister driver */
++	hwrng_unregister(&bcm2708_rng_ops);
++	iounmap(rng_base);
++}
++
++module_init(bcm2708_rng_init);
++module_exit(bcm2708_rng_exit);
++
++MODULE_DESCRIPTION("BCM2708 H/W Random Number Generator (RNG) driver");
++MODULE_LICENSE("GPL and additional rights");
+diff -urN linux-3.10/drivers/char/hw_random/Kconfig linux-rpi-3.10.y/drivers/char/hw_random/Kconfig
+--- linux-3.10/drivers/char/hw_random/Kconfig	2013-06-30 23:13:29.000000000 +0100
++++ linux-rpi-3.10.y/drivers/char/hw_random/Kconfig	2013-07-06 15:25:50.000000000 +0100
+@@ -314,3 +314,15 @@
+ 	  module will be called tpm-rng.
+ 
+ 	  If unsure, say Y.
++
++config HW_RANDOM_BCM2708
++	tristate "BCM2708 generic true random number generator support"
++	depends on HW_RANDOM && ARCH_BCM2708
++	---help---
++	 This driver provides the kernel-side support for the BCM2708 hardware.
++
++	 To compile this driver as a module, choose M here: the
++	 module will be called bcm2708-rng.
++
++	 If unsure, say N.
++
+diff -urN linux-3.10/drivers/char/hw_random/Makefile linux-rpi-3.10.y/drivers/char/hw_random/Makefile
+--- linux-3.10/drivers/char/hw_random/Makefile	2013-06-30 23:13:29.000000000 +0100
++++ linux-rpi-3.10.y/drivers/char/hw_random/Makefile	2013-07-06 15:25:50.000000000 +0100
+@@ -27,3 +27,4 @@
+ obj-$(CONFIG_HW_RANDOM_EXYNOS)	+= exynos-rng.o
+ obj-$(CONFIG_HW_RANDOM_TPM) += tpm-rng.o
+ obj-$(CONFIG_HW_RANDOM_BCM2835) += bcm2835-rng.o
++obj-$(CONFIG_HW_RANDOM_BCM2708) += bcm2708-rng.o