diff options
Diffstat (limited to 'target/linux/brcm2708/patches-3.10/0047-Add-hwrng-hardware-random-number-generator-driver.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-3.10/0047-Add-hwrng-hardware-random-number-generator-driver.patch | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/target/linux/brcm2708/patches-3.10/0047-Add-hwrng-hardware-random-number-generator-driver.patch b/target/linux/brcm2708/patches-3.10/0047-Add-hwrng-hardware-random-number-generator-driver.patch deleted file mode 100644 index 0c378bc20f..0000000000 --- a/target/linux/brcm2708/patches-3.10/0047-Add-hwrng-hardware-random-number-generator-driver.patch +++ /dev/null @@ -1,180 +0,0 @@ -From 1ecfdf8a7a08d52d238dc132c85d37966ca58737 Mon Sep 17 00:00:00 2001 -From: popcornmix <popcornmix@gmail.com> -Date: Wed, 3 Jul 2013 00:51:55 +0100 -Subject: [PATCH 047/196] Add hwrng (hardware random number generator) driver - ---- - arch/arm/mach-bcm2708/include/mach/platform.h | 1 + - drivers/char/hw_random/Kconfig | 12 +++ - drivers/char/hw_random/Makefile | 1 + - drivers/char/hw_random/bcm2708-rng.c | 117 ++++++++++++++++++++++++++ - 4 files changed, 131 insertions(+) - create mode 100755 drivers/char/hw_random/bcm2708-rng.c - -diff --git a/arch/arm/mach-bcm2708/include/mach/platform.h b/arch/arm/mach-bcm2708/include/mach/platform.h -index 89e72d1..992a630 100644 ---- a/arch/arm/mach-bcm2708/include/mach/platform.h -+++ b/arch/arm/mach-bcm2708/include/mach/platform.h -@@ -62,6 +62,7 @@ - #define DMA_BASE (BCM2708_PERI_BASE + 0x7000) /* DMA controller */ - #define ARM_BASE (BCM2708_PERI_BASE + 0xB000) /* BCM2708 ARM control block */ - #define PM_BASE (BCM2708_PERI_BASE + 0x100000) /* Power Management, Reset controller and Watchdog registers */ -+#define RNG_BASE (BCM2708_PERI_BASE + 0x104000) /* Hardware RNG */ - #define GPIO_BASE (BCM2708_PERI_BASE + 0x200000) /* GPIO */ - #define UART0_BASE (BCM2708_PERI_BASE + 0x201000) /* Uart 0 */ - #define MMCI0_BASE (BCM2708_PERI_BASE + 0x202000) /* MMC interface */ -diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig -index 2f9dbf7..d725a53 100644 ---- a/drivers/char/hw_random/Kconfig -+++ b/drivers/char/hw_random/Kconfig -@@ -314,3 +314,15 @@ config HW_RANDOM_TPM - 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 --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile -index bed467c..18fc4d4 100644 ---- a/drivers/char/hw_random/Makefile -+++ b/drivers/char/hw_random/Makefile -@@ -27,3 +27,4 @@ obj-$(CONFIG_HW_RANDOM_PSERIES) += pseries-rng.o - obj-$(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 -diff --git a/drivers/char/hw_random/bcm2708-rng.c b/drivers/char/hw_random/bcm2708-rng.c -new file mode 100755 -index 0000000..1ffa7d7 ---- /dev/null -+++ b/drivers/char/hw_random/bcm2708-rng.c -@@ -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"); --- -1.9.1 - |