172 lines
5.4 KiB
Diff
172 lines
5.4 KiB
Diff
From 7ee92edb5569c1cdc676a2635a40b53e8d9d647d Mon Sep 17 00:00:00 2001
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From: John Crispin <blogic@openwrt.org>
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Date: Thu, 29 Sep 2011 21:29:14 +0200
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Subject: [PATCH 57/73] MIPS: lantiq: falcon VPE softdog
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---
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arch/mips/include/asm/mach-lantiq/falcon/vpe.h | 44 ++++++++++
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arch/mips/lantiq/falcon/softdog_vpe.c | 109 ++++++++++++++++++++++++
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2 files changed, 153 insertions(+), 0 deletions(-)
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create mode 100644 arch/mips/include/asm/mach-lantiq/falcon/vpe.h
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create mode 100644 arch/mips/lantiq/falcon/softdog_vpe.c
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--- /dev/null
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+++ b/arch/mips/include/asm/mach-lantiq/falcon/vpe.h
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@@ -0,0 +1,44 @@
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+/*
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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+ *
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+ * Copyright (C) 2005 infineon
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+ * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
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+ *
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+ */
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+#ifndef _IFXMIPS_VPE_H__
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+#define _IFXMIPS_VPE_H__
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+
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+/* For the explanation of the APIs please refer the section "MT APRP Kernel
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+ * Programming" in AR9 SW Architecture Specification
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+ */
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+int32_t vpe1_sw_start(void* sw_start_addr, uint32_t tcmask, uint32_t flags);
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+int32_t vpe1_sw_stop(uint32_t flags);
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+uint32_t vpe1_get_load_addr (uint32_t flags);
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+uint32_t vpe1_get_max_mem (uint32_t flags);
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+
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+int32_t vpe1_set_boot_param(char *field, char *value, char flags);
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+int32_t vpe1_get_boot_param(char *field, char **value, char flags);
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+
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+/* Watchdog APIs */
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+extern unsigned long vpe1_wdog_ctr;
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+extern unsigned long vpe1_wdog_timeout;
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+
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+unsigned long vpe1_sw_wdog_start(unsigned long);
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+unsigned long vpe1_sw_wdog_stop(unsigned long);
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+
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+typedef int (*VPE_SW_WDOG_RESET)(unsigned long wdog_cleared_ok_count);
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+int32_t vpe1_sw_wdog_register_reset_handler(VPE_SW_WDOG_RESET reset_fn);
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+
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+#endif
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--- /dev/null
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+++ b/arch/mips/lantiq/falcon/softdog_vpe.c
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@@ -0,0 +1,109 @@
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+/*
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+** =============================================================================
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+** FILE NAME : softdog_vpe.c
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+** MODULES : LXDB
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+** DATE : 24-03-2008
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+** AUTHOR : LXDB Team
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+** DESCRIPTION : This header file contains the code for the watchdog
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+** implentation on vpe1 side.
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+** REFERENCES :
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+** COPYRIGHT : Copyright (c) 2008
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+** Am Campeon 1-12, 85579 Neubiberg, Germany
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+** Any use of this software is subject to the conclusion of a respective
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+** License agreement. Without such a License agreement no rights to the
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+** software are granted
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+**
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+** HISTORY :
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+** $Date $Author $Comment
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+** 24-03-2008 LXDB Initial version
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+** ============================================================================
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+*/
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+
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+#include <linux/module.h>
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+#include <linux/moduleparam.h>
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+#include <linux/types.h>
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+#include <linux/timer.h>
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+#include <linux/reboot.h>
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+#include <linux/init.h>
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+#include <linux/jiffies.h>
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+
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+#include <falcon/vpe.h>
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+
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+static unsigned long last_wdog_value;
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+static unsigned long vpe1_wdog_cleared;
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+
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+static unsigned long vpe1_wdog_dead;
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+static void watchdog_vpe0_fire(unsigned long); /* Called when vpe0 timer expires */
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+static void keep_alive_vpe0(unsigned long);
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+VPE_SW_WDOG_RESET reset_local_fn;
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+
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+
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+static struct timer_list watchdog_vpe0_ticktock =
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+ TIMER_INITIALIZER(watchdog_vpe0_fire, 0, 0);
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+
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+static void watchdog_vpe0_fire (unsigned long flags)
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+{
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+ volatile unsigned long *wdog_ctr_value;
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+ wdog_ctr_value = (void*)vpe1_wdog_ctr;
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+ if (*wdog_ctr_value == last_wdog_value) { /* VPE1 watchdog expiry handling */
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+ vpe1_sw_wdog_stop(flags);
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+ vpe1_wdog_dead++;
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+ printk(KERN_DEBUG "VPE1 watchdog reset handler called\n");
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+ /* Call the reset handler function */
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+ reset_local_fn(flags);
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+ } else { /* Everything is OK on vpe1 side. Continue. */
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+ last_wdog_value = *wdog_ctr_value;
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+ vpe1_wdog_cleared++;
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+ keep_alive_vpe0(flags);
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+ }
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+}
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+
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+int32_t vpe1_sw_wdog_register_reset_handler (VPE_SW_WDOG_RESET reset_fn)
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+{
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+ reset_local_fn = (VPE_SW_WDOG_RESET)reset_fn;
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+ return 0;
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+}
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+
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+static void keep_alive_vpe0(unsigned long flags)
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+{
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+ mod_timer(&watchdog_vpe0_ticktock, jiffies+ vpe1_wdog_timeout );
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+}
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+
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+unsigned long vpe1_sw_wdog_start(unsigned long flags)
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+{
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+ volatile unsigned long *wdog_ctr_value;
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+ wdog_ctr_value = (void*)vpe1_wdog_ctr;
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+ *wdog_ctr_value = 0;
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+ last_wdog_value = 0;
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+ keep_alive_vpe0(flags);
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+ return 0;
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+}
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+
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+unsigned long vpe1_sw_wdog_stop(unsigned long flags)
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+{
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+ del_timer(&watchdog_vpe0_ticktock);
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+ return 0;
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+}
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+
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+static int __init watchdog_vpe1_init(void)
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+{
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+ /* Nothing to be done here */
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+ return 0;
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+}
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+
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+static void __exit watchdog_vpe1_exit(void)
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+{
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+ unsigned long flags=0;
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+ vpe1_sw_wdog_stop(flags);
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+}
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+
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+module_init(watchdog_vpe1_init);
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+module_exit(watchdog_vpe1_exit);
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+
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+EXPORT_SYMBOL(vpe1_sw_wdog_register_reset_handler);
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+EXPORT_SYMBOL(vpe1_sw_wdog_start);
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+EXPORT_SYMBOL(vpe1_sw_wdog_stop);
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+
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+MODULE_AUTHOR("LXDB");
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+MODULE_DESCRIPTION("Software Watchdog For VPE1");
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+MODULE_LICENSE("GPL");
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