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Message-Id: <1249929025-29625-1-git-send-email-ddaney@caviumnetworks.com>
Date: Mon, 10 Aug 2009 11:30:24 -0700
From: David Daney <ddaney@...iumnetworks.com>
To: ralf@...ux-mips.org, torvalds@...ux-foundation.org,
akpm@...ux-foundation.org
Cc: linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
David Daney <ddaney@...iumnetworks.com>
Subject: [PATCH 1/2] MIPS: Octeon: Add hardware RNG platform device.
Add a platform device for the Octeon Random Number Generator (RNG).
Signed-off-by: David Daney <ddaney@...iumnetworks.com>
---
arch/mips/cavium-octeon/setup.c | 44 +++++++++++++
arch/mips/include/asm/octeon/cvmx-rnm-defs.h | 86 ++++++++++++++++++++++++++
2 files changed, 130 insertions(+), 0 deletions(-)
create mode 100644 arch/mips/include/asm/octeon/cvmx-rnm-defs.h
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index bc0c869..c67487a 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -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);
@@ -931,3 +932,46 @@ out:
return ret;
}
device_initcall(octeon_cf_device_init);
+
+/* Octeon Random Number Generator. */
+static int __init octeon_rng_device_init(void)
+{
+ struct platform_device *pd;
+ struct resource rng_resources[2];
+ unsigned int res_count;
+ int ret = 0;
+
+ memset(rng_resources, 0, sizeof(rng_resources));
+ res_count = 0;
+ rng_resources[res_count].flags = IORESOURCE_MEM;
+ rng_resources[res_count].start = XKPHYS_TO_PHYS(CVMX_RNM_CTL_STATUS);
+ rng_resources[res_count].end = rng_resources[res_count].start + 0xf;
+ res_count++;
+
+ rng_resources[res_count].flags = IORESOURCE_MEM;
+ rng_resources[res_count].start = cvmx_build_io_address(8, 0);
+ rng_resources[res_count].end = rng_resources[res_count].start + 0x7;
+ res_count++;
+
+ pd = platform_device_alloc("octeon_rng", -1);
+ if (!pd) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = platform_device_add_resources(pd, rng_resources, res_count);
+ 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);
diff --git a/arch/mips/include/asm/octeon/cvmx-rnm-defs.h b/arch/mips/include/asm/octeon/cvmx-rnm-defs.h
new file mode 100644
index 0000000..a25e2bc
--- /dev/null
+++ b/arch/mips/include/asm/octeon/cvmx-rnm-defs.h
@@ -0,0 +1,86 @@
+/***********************license start***************
+ * Author: Cavium Networks
+ *
+ * Contact: support@...iumnetworks.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__
+
+#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
--
1.6.0.6
--
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