target/linux/lantiq/patches-3.0/0020-MIPS-lantiq-adds-falcon-VPE-softdog.patch

   1 From e3c377986855f820513edf2924a022a39c363908 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Thu, 29 Sep 2011 21:29:14 +0200
   4 Subject: [PATCH 20/24] MIPS: lantiq: adds falcon VPE softdog
   5
   6 ---
   7  arch/mips/include/asm/mach-lantiq/falcon/vpe.h |   44 ++++++++++
   8  arch/mips/lantiq/falcon/softdog_vpe.c          |  109 ++++++++++++++++++++++++
   9  2 files changed, 153 insertions(+), 0 deletions(-)
  10  create mode 100644 arch/mips/include/asm/mach-lantiq/falcon/vpe.h
  11  create mode 100644 arch/mips/lantiq/falcon/softdog_vpe.c
  12
  13 Index: linux-3.0.3/arch/mips/include/asm/mach-lantiq/falcon/vpe.h
  14 ===================================================================
  15 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
  16 +++ linux-3.0.3/arch/mips/include/asm/mach-lantiq/falcon/vpe.h  2011-10-05 13:26:22.732981532 +0200
  17 @@ -0,0 +1,44 @@
  18 +/*
  19 + *   This program is free software; you can redistribute it and/or modify
  20 + *   it under the terms of the GNU General Public License as published by
  21 + *   the Free Software Foundation; either version 2 of the License, or
  22 + *   (at your option) any later version.
  23 + *
  24 + *   This program is distributed in the hope that it will be useful,
  25 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  26 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27 + *   GNU General Public License for more details.
  28 + *
  29 + *   You should have received a copy of the GNU General Public License
  30 + *   along with this program; if not, write to the Free Software
  31 + *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  32 + *
  33 + *   Copyright (C) 2005 infineon
  34 + *   Copyright (C) 2007 John Crispin <blogic@openwrt.org>
  35 + *
  36 + */
  37 +#ifndef _IFXMIPS_VPE_H__
  38 +#define _IFXMIPS_VPE_H__
  39 +
  40 +/* For the explanation of the APIs please refer the section "MT APRP Kernel
  41 + * Programming" in AR9 SW Architecture Specification
  42 + */
  43 +int32_t vpe1_sw_start(void* sw_start_addr, uint32_t tcmask, uint32_t flags);
  44 +int32_t vpe1_sw_stop(uint32_t flags);
  45 +uint32_t vpe1_get_load_addr (uint32_t flags);
  46 +uint32_t vpe1_get_max_mem (uint32_t flags);
  47 +
  48 +int32_t vpe1_set_boot_param(char *field, char *value, char flags);
  49 +int32_t vpe1_get_boot_param(char *field, char **value, char flags);
  50 +
  51 +/* Watchdog APIs */
  52 +extern unsigned long vpe1_wdog_ctr;
  53 +extern unsigned long vpe1_wdog_timeout;
  54 +
  55 +unsigned long vpe1_sw_wdog_start(unsigned long);
  56 +unsigned long vpe1_sw_wdog_stop(unsigned long);
  57 +
  58 +typedef int (*VPE_SW_WDOG_RESET)(unsigned long wdog_cleared_ok_count);
  59 +int32_t vpe1_sw_wdog_register_reset_handler(VPE_SW_WDOG_RESET reset_fn);
  60 +
  61 +#endif
  62 Index: linux-3.0.3/arch/mips/lantiq/falcon/softdog_vpe.c
  63 ===================================================================
  64 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
  65 +++ linux-3.0.3/arch/mips/lantiq/falcon/softdog_vpe.c   2011-10-05 13:26:22.736981533 +0200
  66 @@ -0,0 +1,109 @@
  67 +/*
  68 +** =============================================================================
  69 +** FILE NAME     : softdog_vpe.c
  70 +** MODULES       : LXDB
  71 +** DATE          : 24-03-2008
  72 +** AUTHOR        : LXDB Team
  73 +** DESCRIPTION   : This header file contains the code for the watchdog
  74 +**                 implentation on vpe1 side.
  75 +** REFERENCES    :
  76 +** COPYRIGHT     : Copyright (c) 2008
  77 +**                 Am Campeon 1-12, 85579 Neubiberg, Germany
  78 +** Any use of this software is subject to the conclusion of a respective
  79 +** License agreement. Without such a License agreement no rights to the
  80 +** software are granted
  81 +**
  82 +** HISTORY       :
  83 +** $Date   $Author    $Comment
  84 +** 24-03-2008   LXDB    Initial version
  85 +** ============================================================================
  86 +*/
  87 +
  88 +#include <linux/module.h>
  89 +#include <linux/moduleparam.h>
  90 +#include <linux/types.h>
  91 +#include <linux/timer.h>
  92 +#include <linux/reboot.h>
  93 +#include <linux/init.h>
  94 +#include <linux/jiffies.h>
  95 +
  96 +#include <falcon/vpe.h>
  97 +
  98 +static unsigned long last_wdog_value;
  99 +static unsigned long vpe1_wdog_cleared;
 100 +
 101 +static unsigned long vpe1_wdog_dead;
 102 +static void watchdog_vpe0_fire(unsigned long); /* Called when vpe0 timer expires */
 103 +static void keep_alive_vpe0(unsigned long);
 104 +VPE_SW_WDOG_RESET reset_local_fn;
 105 +
 106 +
 107 +static struct timer_list watchdog_vpe0_ticktock =
 108 +                TIMER_INITIALIZER(watchdog_vpe0_fire, 0, 0);
 109 +
 110 +static void watchdog_vpe0_fire (unsigned long flags)
 111 +{
 112 +       volatile unsigned long *wdog_ctr_value;
 113 +       wdog_ctr_value = (void*)vpe1_wdog_ctr;
 114 +       if (*wdog_ctr_value == last_wdog_value) { /* VPE1 watchdog expiry handling */
 115 +               vpe1_sw_wdog_stop(flags);
 116 +               vpe1_wdog_dead++;
 117 +               printk(KERN_DEBUG "VPE1 watchdog reset handler called\n");
 118 +       /* Call the reset handler function */
 119 +               reset_local_fn(flags);
 120 +       } else { /* Everything is OK on vpe1 side. Continue. */
 121 +               last_wdog_value = *wdog_ctr_value;
 122 +               vpe1_wdog_cleared++;
 123 +               keep_alive_vpe0(flags);
 124 +       }
 125 +}
 126 +
 127 +int32_t vpe1_sw_wdog_register_reset_handler (VPE_SW_WDOG_RESET reset_fn)
 128 +{
 129 +       reset_local_fn = (VPE_SW_WDOG_RESET)reset_fn;
 130 +       return 0;
 131 +}
 132 +
 133 +static void keep_alive_vpe0(unsigned long flags)
 134 +{
 135 +       mod_timer(&watchdog_vpe0_ticktock, jiffies+ vpe1_wdog_timeout );
 136 +}
 137 +
 138 +unsigned long vpe1_sw_wdog_start(unsigned long flags)
 139 +{
 140 +       volatile unsigned long *wdog_ctr_value;
 141 +       wdog_ctr_value = (void*)vpe1_wdog_ctr;
 142 +       *wdog_ctr_value = 0;
 143 +       last_wdog_value = 0;
 144 +       keep_alive_vpe0(flags);
 145 +       return 0;
 146 +}
 147 +
 148 +unsigned long vpe1_sw_wdog_stop(unsigned long flags)
 149 +{
 150 +       del_timer(&watchdog_vpe0_ticktock);
 151 +       return 0;
 152 +}
 153 +
 154 +static int __init watchdog_vpe1_init(void)
 155 +{
 156 +       /* Nothing to be done here */
 157 +       return 0;
 158 +}
 159 +
 160 +static void __exit watchdog_vpe1_exit(void)
 161 +{
 162 +       unsigned long flags=0;
 163 +       vpe1_sw_wdog_stop(flags);
 164 +}
 165 +
 166 +module_init(watchdog_vpe1_init);
 167 +module_exit(watchdog_vpe1_exit);
 168 +
 169 +EXPORT_SYMBOL(vpe1_sw_wdog_register_reset_handler);
 170 +EXPORT_SYMBOL(vpe1_sw_wdog_start);
 171 +EXPORT_SYMBOL(vpe1_sw_wdog_stop);
 172 +
 173 +MODULE_AUTHOR("LXDB");
 174 +MODULE_DESCRIPTION("Software Watchdog For VPE1");
 175 +MODULE_LICENSE("GPL");
 176 Index: linux-3.0.3/arch/mips/lantiq/falcon/Makefile
 177 ===================================================================
 178 --- linux-3.0.3.orig/arch/mips/lantiq/falcon/Makefile   2011-10-05 13:38:41.801013127 +0200
 179 +++ linux-3.0.3/arch/mips/lantiq/falcon/Makefile        2011-10-05 13:38:47.341013363 +0200
 180 @@ -1,2 +1,2 @@
 181 -obj-y := clk.o prom.o reset.o sysctrl.o devices.o gpio.o
 182 +obj-y := clk.o prom.o reset.o sysctrl.o devices.o gpio.o softdog_vpe.o
 183  obj-$(CONFIG_LANTIQ_MACH_EASY98000) += mach-easy98000.o