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MIPS: Octeon: Add hardware RNG platform device.

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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>
This commit is contained in:
David Daney 2009-08-20 14:10:22 -07:00 committed by Ralf Baechle
parent 982f6ffeee
commit e26449153c
2 changed files with 131 additions and 0 deletions
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43
arch/mips/cavium-octeon/setup.c
View File

@ -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
arch/mips/include/asm/octeon/cvmx-rnm-defs.h Normal file
View File

@ -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