mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-11 10:14:38 +02:00
e575c1b6f3
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19513 3c298f89-4303-0410-b956-a3cf2f4a3e73
352 lines
10 KiB
Diff
352 lines
10 KiB
Diff
From: David Daney <ddaney@caviumnetworks.com>
|
|
Date: Thu, 20 Aug 2009 21:10:22 +0000 (-0700)
|
|
Subject: MIPS: Octeon: Add hardware RNG platform device.
|
|
X-Git-Tag: linux-2.6.32-rc1~34
|
|
X-Git-Url: http://www.linux-mips.org/git?p=linux.git;a=commitdiff_plain;h=c691b963;hp=a68577bc6ce2b5e422cdb7a993b1c07cc410e02a
|
|
|
|
MIPS: Octeon: Add hardware RNG platform device.
|
|
|
|
Add a platform device for the Octeon Random Number Generator (RNG).
|
|
|
|
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
|
|
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
|
|
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
|
---
|
|
|
|
Index: linux-2.6.30.8/arch/mips/cavium-octeon/setup.c
|
|
===================================================================
|
|
--- linux-2.6.30.8.orig/arch/mips/cavium-octeon/setup.c 2009-09-24 17:28:02.000000000 +0200
|
|
+++ linux-2.6.30.8/arch/mips/cavium-octeon/setup.c 2009-10-08 13:10:09.000000000 +0200
|
|
@@ -32,6 +32,7 @@
|
|
#include <asm/time.h>
|
|
|
|
#include <asm/octeon/octeon.h>
|
|
+#include <asm/octeon/cvmx-rnm-defs.h>
|
|
|
|
#ifdef CONFIG_CAVIUM_DECODE_RSL
|
|
extern void cvmx_interrupt_rsl_decode(void);
|
|
@@ -925,3 +926,45 @@
|
|
return ret;
|
|
}
|
|
device_initcall(octeon_cf_device_init);
|
|
+
|
|
+/* Octeon Random Number Generator. */
|
|
+static int __init octeon_rng_device_init(void)
|
|
+{
|
|
+ struct platform_device *pd;
|
|
+ int ret = 0;
|
|
+
|
|
+ struct resource rng_resources[] = {
|
|
+ {
|
|
+ .flags = IORESOURCE_MEM,
|
|
+ .start = XKPHYS_TO_PHYS(CVMX_RNM_CTL_STATUS),
|
|
+ .end = XKPHYS_TO_PHYS(CVMX_RNM_CTL_STATUS) + 0xf
|
|
+ }, {
|
|
+ .flags = IORESOURCE_MEM,
|
|
+ .start = cvmx_build_io_address(8, 0),
|
|
+ .end = cvmx_build_io_address(8, 0) + 0x7
|
|
+ }
|
|
+ };
|
|
+
|
|
+ pd = platform_device_alloc("octeon_rng", -1);
|
|
+ if (!pd) {
|
|
+ ret = -ENOMEM;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ ret = platform_device_add_resources(pd, rng_resources,
|
|
+ ARRAY_SIZE(rng_resources));
|
|
+ if (ret)
|
|
+ goto fail;
|
|
+
|
|
+ ret = platform_device_add(pd);
|
|
+ if (ret)
|
|
+ goto fail;
|
|
+
|
|
+ return ret;
|
|
+fail:
|
|
+ platform_device_put(pd);
|
|
+
|
|
+out:
|
|
+ return ret;
|
|
+}
|
|
+device_initcall(octeon_rng_device_init);
|
|
Index: linux-2.6.30.8/arch/mips/include/asm/octeon/cvmx-rnm-defs.h
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
|
|
+++ linux-2.6.30.8/arch/mips/include/asm/octeon/cvmx-rnm-defs.h 2009-10-08 13:10:09.000000000 +0200
|
|
@@ -0,0 +1,88 @@
|
|
+/***********************license start***************
|
|
+ * Author: Cavium Networks
|
|
+ *
|
|
+ * Contact: support@caviumnetworks.com
|
|
+ * This file is part of the OCTEON SDK
|
|
+ *
|
|
+ * Copyright (c) 2003-2008 Cavium Networks
|
|
+ *
|
|
+ * This file is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License, Version 2, as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ * This file is distributed in the hope that it will be useful, but
|
|
+ * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
|
|
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
|
|
+ * NONINFRINGEMENT. See the GNU General Public License for more
|
|
+ * details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License
|
|
+ * along with this file; if not, write to the Free Software
|
|
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
+ * or visit http://www.gnu.org/licenses/.
|
|
+ *
|
|
+ * This file may also be available under a different license from Cavium.
|
|
+ * Contact Cavium Networks for more information
|
|
+ ***********************license end**************************************/
|
|
+
|
|
+#ifndef __CVMX_RNM_DEFS_H__
|
|
+#define __CVMX_RNM_DEFS_H__
|
|
+
|
|
+#include <linux/types.h>
|
|
+
|
|
+#define CVMX_RNM_BIST_STATUS \
|
|
+ CVMX_ADD_IO_SEG(0x0001180040000008ull)
|
|
+#define CVMX_RNM_CTL_STATUS \
|
|
+ CVMX_ADD_IO_SEG(0x0001180040000000ull)
|
|
+
|
|
+union cvmx_rnm_bist_status {
|
|
+ uint64_t u64;
|
|
+ struct cvmx_rnm_bist_status_s {
|
|
+ uint64_t reserved_2_63:62;
|
|
+ uint64_t rrc:1;
|
|
+ uint64_t mem:1;
|
|
+ } s;
|
|
+ struct cvmx_rnm_bist_status_s cn30xx;
|
|
+ struct cvmx_rnm_bist_status_s cn31xx;
|
|
+ struct cvmx_rnm_bist_status_s cn38xx;
|
|
+ struct cvmx_rnm_bist_status_s cn38xxp2;
|
|
+ struct cvmx_rnm_bist_status_s cn50xx;
|
|
+ struct cvmx_rnm_bist_status_s cn52xx;
|
|
+ struct cvmx_rnm_bist_status_s cn52xxp1;
|
|
+ struct cvmx_rnm_bist_status_s cn56xx;
|
|
+ struct cvmx_rnm_bist_status_s cn56xxp1;
|
|
+ struct cvmx_rnm_bist_status_s cn58xx;
|
|
+ struct cvmx_rnm_bist_status_s cn58xxp1;
|
|
+};
|
|
+
|
|
+union cvmx_rnm_ctl_status {
|
|
+ uint64_t u64;
|
|
+ struct cvmx_rnm_ctl_status_s {
|
|
+ uint64_t reserved_9_63:55;
|
|
+ uint64_t ent_sel:4;
|
|
+ uint64_t exp_ent:1;
|
|
+ uint64_t rng_rst:1;
|
|
+ uint64_t rnm_rst:1;
|
|
+ uint64_t rng_en:1;
|
|
+ uint64_t ent_en:1;
|
|
+ } s;
|
|
+ struct cvmx_rnm_ctl_status_cn30xx {
|
|
+ uint64_t reserved_4_63:60;
|
|
+ uint64_t rng_rst:1;
|
|
+ uint64_t rnm_rst:1;
|
|
+ uint64_t rng_en:1;
|
|
+ uint64_t ent_en:1;
|
|
+ } cn30xx;
|
|
+ struct cvmx_rnm_ctl_status_cn30xx cn31xx;
|
|
+ struct cvmx_rnm_ctl_status_cn30xx cn38xx;
|
|
+ struct cvmx_rnm_ctl_status_cn30xx cn38xxp2;
|
|
+ struct cvmx_rnm_ctl_status_s cn50xx;
|
|
+ struct cvmx_rnm_ctl_status_s cn52xx;
|
|
+ struct cvmx_rnm_ctl_status_s cn52xxp1;
|
|
+ struct cvmx_rnm_ctl_status_s cn56xx;
|
|
+ struct cvmx_rnm_ctl_status_s cn56xxp1;
|
|
+ struct cvmx_rnm_ctl_status_s cn58xx;
|
|
+ struct cvmx_rnm_ctl_status_s cn58xxp1;
|
|
+};
|
|
+
|
|
+#endif
|
|
Index: linux-2.6.30.8/drivers/char/hw_random/Kconfig
|
|
===================================================================
|
|
--- linux-2.6.30.8.orig/drivers/char/hw_random/Kconfig 2009-09-24 17:28:02.000000000 +0200
|
|
+++ linux-2.6.30.8/drivers/char/hw_random/Kconfig 2009-10-08 13:10:09.000000000 +0200
|
|
@@ -126,6 +126,19 @@
|
|
|
|
If unsure, say Y.
|
|
|
|
+config HW_RANDOM_OCTEON
|
|
+ tristate "Octeon Random Number Generator support"
|
|
+ depends on HW_RANDOM && CPU_CAVIUM_OCTEON
|
|
+ default HW_RANDOM
|
|
+ ---help---
|
|
+ This driver provides kernel-side support for the Random Number
|
|
+ Generator hardware found on Octeon processors.
|
|
+
|
|
+ To compile this driver as a module, choose M here: the
|
|
+ module will be called octeon-rng.
|
|
+
|
|
+ If unsure, say Y.
|
|
+
|
|
config HW_RANDOM_PASEMI
|
|
tristate "PA Semi HW Random Number Generator support"
|
|
depends on HW_RANDOM && PPC_PASEMI
|
|
Index: linux-2.6.30.8/drivers/char/hw_random/Makefile
|
|
===================================================================
|
|
--- linux-2.6.30.8.orig/drivers/char/hw_random/Makefile 2009-09-24 17:28:02.000000000 +0200
|
|
+++ linux-2.6.30.8/drivers/char/hw_random/Makefile 2009-10-08 13:10:23.000000000 +0200
|
|
@@ -15,3 +15,4 @@
|
|
obj-$(CONFIG_HW_RANDOM_OMAP) += omap-rng.o
|
|
obj-$(CONFIG_HW_RANDOM_PASEMI) += pasemi-rng.o
|
|
obj-$(CONFIG_HW_RANDOM_VIRTIO) += virtio-rng.o
|
|
+obj-$(CONFIG_HW_RANDOM_OCTEON) += octeon-rng.o
|
|
Index: linux-2.6.30.8/drivers/char/hw_random/octeon-rng.c
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
|
|
+++ linux-2.6.30.8/drivers/char/hw_random/octeon-rng.c 2009-10-08 13:10:09.000000000 +0200
|
|
@@ -0,0 +1,147 @@
|
|
+/*
|
|
+ * Hardware Random Number Generator support for Cavium Networks
|
|
+ * Octeon processor family.
|
|
+ *
|
|
+ * This file is subject to the terms and conditions of the GNU General Public
|
|
+ * License. See the file "COPYING" in the main directory of this archive
|
|
+ * for more details.
|
|
+ *
|
|
+ * Copyright (C) 2009 Cavium Networks
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/platform_device.h>
|
|
+#include <linux/device.h>
|
|
+#include <linux/hw_random.h>
|
|
+#include <linux/io.h>
|
|
+
|
|
+#include <asm/octeon/octeon.h>
|
|
+#include <asm/octeon/cvmx-rnm-defs.h>
|
|
+
|
|
+struct octeon_rng {
|
|
+ struct hwrng ops;
|
|
+ void __iomem *control_status;
|
|
+ void __iomem *result;
|
|
+};
|
|
+
|
|
+static int octeon_rng_init(struct hwrng *rng)
|
|
+{
|
|
+ union cvmx_rnm_ctl_status ctl;
|
|
+ struct octeon_rng *p = container_of(rng, struct octeon_rng, ops);
|
|
+
|
|
+ ctl.u64 = 0;
|
|
+ ctl.s.ent_en = 1; /* Enable the entropy source. */
|
|
+ ctl.s.rng_en = 1; /* Enable the RNG hardware. */
|
|
+ cvmx_write_csr((u64)p->control_status, ctl.u64);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void octeon_rng_cleanup(struct hwrng *rng)
|
|
+{
|
|
+ union cvmx_rnm_ctl_status ctl;
|
|
+ struct octeon_rng *p = container_of(rng, struct octeon_rng, ops);
|
|
+
|
|
+ ctl.u64 = 0;
|
|
+ /* Disable everything. */
|
|
+ cvmx_write_csr((u64)p->control_status, ctl.u64);
|
|
+}
|
|
+
|
|
+static int octeon_rng_data_read(struct hwrng *rng, u32 *data)
|
|
+{
|
|
+ struct octeon_rng *p = container_of(rng, struct octeon_rng, ops);
|
|
+
|
|
+ *data = cvmx_read64_uint32((u64)p->result);
|
|
+ return sizeof(u32);
|
|
+}
|
|
+
|
|
+static int __devinit octeon_rng_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct resource *res_ports;
|
|
+ struct resource *res_result;
|
|
+ struct octeon_rng *rng;
|
|
+ int ret;
|
|
+ struct hwrng ops = {
|
|
+ .name = "octeon",
|
|
+ .init = octeon_rng_init,
|
|
+ .cleanup = octeon_rng_cleanup,
|
|
+ .data_read = octeon_rng_data_read
|
|
+ };
|
|
+
|
|
+ rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL);
|
|
+ if (!rng)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ res_ports = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
+ if (!res_ports)
|
|
+ goto err_ports;
|
|
+
|
|
+ res_result = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
+ if (!res_result)
|
|
+ goto err_ports;
|
|
+
|
|
+
|
|
+ rng->control_status = devm_ioremap_nocache(&pdev->dev,
|
|
+ res_ports->start,
|
|
+ sizeof(u64));
|
|
+ if (!rng->control_status)
|
|
+ goto err_ports;
|
|
+
|
|
+ rng->result = devm_ioremap_nocache(&pdev->dev,
|
|
+ res_result->start,
|
|
+ sizeof(u64));
|
|
+ if (!rng->result)
|
|
+ goto err_r;
|
|
+
|
|
+ rng->ops = ops;
|
|
+
|
|
+ dev_set_drvdata(&pdev->dev, &rng->ops);
|
|
+ ret = hwrng_register(&rng->ops);
|
|
+ if (ret)
|
|
+ goto err;
|
|
+
|
|
+ dev_info(&pdev->dev, "Octeon Random Number Generator\n");
|
|
+
|
|
+ return 0;
|
|
+err:
|
|
+ devm_iounmap(&pdev->dev, rng->control_status);
|
|
+err_r:
|
|
+ devm_iounmap(&pdev->dev, rng->result);
|
|
+err_ports:
|
|
+ devm_kfree(&pdev->dev, rng);
|
|
+ return -ENOENT;
|
|
+}
|
|
+
|
|
+static int __exit octeon_rng_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct hwrng *rng = dev_get_drvdata(&pdev->dev);
|
|
+
|
|
+ hwrng_unregister(rng);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct platform_driver octeon_rng_driver = {
|
|
+ .driver = {
|
|
+ .name = "octeon_rng",
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+ .probe = octeon_rng_probe,
|
|
+ .remove = __exit_p(octeon_rng_remove),
|
|
+};
|
|
+
|
|
+static int __init octeon_rng_mod_init(void)
|
|
+{
|
|
+ return platform_driver_register(&octeon_rng_driver);
|
|
+}
|
|
+
|
|
+static void __exit octeon_rng_mod_exit(void)
|
|
+{
|
|
+ platform_driver_unregister(&octeon_rng_driver);
|
|
+}
|
|
+
|
|
+module_init(octeon_rng_mod_init);
|
|
+module_exit(octeon_rng_mod_exit);
|
|
+
|
|
+MODULE_AUTHOR("David Daney");
|
|
+MODULE_LICENSE("GPL");
|