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Commit e2644915 authored by David Daney's avatar David Daney Committed by Ralf Baechle
Browse files

MIPS: Octeon: Add hardware RNG platform device.



Add a platform device for the Octeon Random Number Generator (RNG).

Signed-off-by: default avatarDavid Daney <ddaney@caviumnetworks.com>
Acked-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 982f6ffe
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+43 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@
#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);
@@ -926,3 +927,45 @@ static int __init octeon_cf_device_init(void)
	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);
+88 −0
Original line number Diff line number Diff line
/***********************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