target/linux/lantiq/patches-4.9/0153-lantiq-VPE-softdog.patch

   1 --- /dev/null
   2 +++ b/arch/mips/include/asm/mach-lantiq/vpe.h
   3 @@ -0,0 +1,44 @@
   4 +/*
   5 + *   This program is free software; you can redistribute it and/or modify
   6 + *   it under the terms of the GNU General Public License as published by
   7 + *   the Free Software Foundation; either version 2 of the License, or
   8 + *   (at your option) any later version.
   9 + *
  10 + *   This program is distributed in the hope that it will be useful,
  11 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 + *   GNU General Public License for more details.
  14 + *
  15 + *   You should have received a copy of the GNU General Public License
  16 + *   along with this program; if not, write to the Free Software
  17 + *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  18 + *
  19 + *   Copyright (C) 2005 infineon
  20 + *   Copyright (C) 2007 John Crispin <blogic@openwrt.org>
  21 + *
  22 + */
  23 +#ifndef _IFXMIPS_VPE_H__
  24 +#define _IFXMIPS_VPE_H__
  25 +
  26 +/* For the explanation of the APIs please refer the section "MT APRP Kernel
  27 + * Programming" in AR9 SW Architecture Specification
  28 + */
  29 +int32_t vpe1_sw_start(void* sw_start_addr, uint32_t tcmask, uint32_t flags);
  30 +int32_t vpe1_sw_stop(uint32_t flags);
  31 +uint32_t vpe1_get_load_addr (uint32_t flags);
  32 +uint32_t vpe1_get_max_mem (uint32_t flags);
  33 +
  34 +int32_t vpe1_set_boot_param(char *field, char *value, char flags);
  35 +int32_t vpe1_get_boot_param(char *field, char **value, char flags);
  36 +
  37 +/* Watchdog APIs */
  38 +extern unsigned long vpe1_wdog_ctr;
  39 +extern unsigned long vpe1_wdog_timeout;
  40 +
  41 +unsigned long vpe1_sw_wdog_start(unsigned long);
  42 +unsigned long vpe1_sw_wdog_stop(unsigned long);
  43 +
  44 +typedef int (*VPE_SW_WDOG_RESET)(unsigned long wdog_cleared_ok_count);
  45 +int32_t vpe1_sw_wdog_register_reset_handler(VPE_SW_WDOG_RESET reset_fn);
  46 +
  47 +#endif
  48 --- /dev/null
  49 +++ b/arch/mips/lantiq/softdog_vpe.c
  50 @@ -0,0 +1,109 @@
  51 +/*
  52 +** =============================================================================
  53 +** FILE NAME     : softdog_vpe.c
  54 +** MODULES       : LXDB
  55 +** DATE          : 24-03-2008
  56 +** AUTHOR        : LXDB Team
  57 +** DESCRIPTION   : This header file contains the code for the watchdog
  58 +**                 implentation on vpe1 side.
  59 +** REFERENCES    :
  60 +** COPYRIGHT     : Copyright (c) 2008
  61 +**                 Am Campeon 1-12, 85579 Neubiberg, Germany
  62 +** Any use of this software is subject to the conclusion of a respective
  63 +** License agreement. Without such a License agreement no rights to the
  64 +** software are granted
  65 +**
  66 +** HISTORY       :
  67 +** $Date   $Author    $Comment
  68 +** 24-03-2008   LXDB    Initial version
  69 +** ============================================================================
  70 +*/
  71 +
  72 +#include <linux/module.h>
  73 +#include <linux/moduleparam.h>
  74 +#include <linux/types.h>
  75 +#include <linux/timer.h>
  76 +#include <linux/reboot.h>
  77 +#include <linux/init.h>
  78 +#include <linux/jiffies.h>
  79 +
  80 +#include <vpe.h>
  81 +
  82 +static unsigned long last_wdog_value;
  83 +static unsigned long vpe1_wdog_cleared;
  84 +
  85 +static unsigned long vpe1_wdog_dead;
  86 +static void watchdog_vpe0_fire(unsigned long); /* Called when vpe0 timer expires */
  87 +static void keep_alive_vpe0(unsigned long);
  88 +VPE_SW_WDOG_RESET reset_local_fn;
  89 +
  90 +
  91 +static struct timer_list watchdog_vpe0_ticktock =
  92 +                TIMER_INITIALIZER(watchdog_vpe0_fire, 0, 0);
  93 +
  94 +static void watchdog_vpe0_fire (unsigned long flags)
  95 +{
  96 +       volatile unsigned long *wdog_ctr_value;
  97 +       wdog_ctr_value = (void*)vpe1_wdog_ctr;
  98 +       if (*wdog_ctr_value == last_wdog_value) { /* VPE1 watchdog expiry handling */
  99 +               vpe1_sw_wdog_stop(flags);
 100 +               vpe1_wdog_dead++;
 101 +               printk(KERN_DEBUG "VPE1 watchdog reset handler called\n");
 102 +       /* Call the reset handler function */
 103 +               reset_local_fn(flags);
 104 +       } else { /* Everything is OK on vpe1 side. Continue. */
 105 +               last_wdog_value = *wdog_ctr_value;
 106 +               vpe1_wdog_cleared++;
 107 +               keep_alive_vpe0(flags);
 108 +       }
 109 +}
 110 +
 111 +int32_t vpe1_sw_wdog_register_reset_handler (VPE_SW_WDOG_RESET reset_fn)
 112 +{
 113 +       reset_local_fn = (VPE_SW_WDOG_RESET)reset_fn;
 114 +       return 0;
 115 +}
 116 +
 117 +static void keep_alive_vpe0(unsigned long flags)
 118 +{
 119 +       mod_timer(&watchdog_vpe0_ticktock, jiffies+ vpe1_wdog_timeout );
 120 +}
 121 +
 122 +unsigned long vpe1_sw_wdog_start(unsigned long flags)
 123 +{
 124 +       volatile unsigned long *wdog_ctr_value;
 125 +       wdog_ctr_value = (void*)vpe1_wdog_ctr;
 126 +       *wdog_ctr_value = 0;
 127 +       last_wdog_value = 0;
 128 +       keep_alive_vpe0(flags);
 129 +       return 0;
 130 +}
 131 +
 132 +unsigned long vpe1_sw_wdog_stop(unsigned long flags)
 133 +{
 134 +       del_timer(&watchdog_vpe0_ticktock);
 135 +       return 0;
 136 +}
 137 +
 138 +static int __init watchdog_vpe1_init(void)
 139 +{
 140 +       /* Nothing to be done here */
 141 +       return 0;
 142 +}
 143 +
 144 +static void __exit watchdog_vpe1_exit(void)
 145 +{
 146 +       unsigned long flags=0;
 147 +       vpe1_sw_wdog_stop(flags);
 148 +}
 149 +
 150 +module_init(watchdog_vpe1_init);
 151 +module_exit(watchdog_vpe1_exit);
 152 +
 153 +EXPORT_SYMBOL(vpe1_sw_wdog_register_reset_handler);
 154 +EXPORT_SYMBOL(vpe1_sw_wdog_start);
 155 +EXPORT_SYMBOL(vpe1_sw_wdog_stop);
 156 +
 157 +MODULE_AUTHOR("LXDB");
 158 +MODULE_DESCRIPTION("Software Watchdog For VPE1");
 159 +MODULE_LICENSE("GPL");
 160 --- a/arch/mips/lantiq/Makefile
 161 +++ b/arch/mips/lantiq/Makefile
 162 @@ -6,6 +6,8 @@
 163
 164  obj-y := irq.o clk.o prom.o
 165
 166 +obj-$(CONFIG_MIPS_VPE_LOADER) += softdog_vpe.o
 167 +
 168  obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
 169
 170  obj-$(CONFIG_SOC_TYPE_XWAY) += xway/