Root/target/linux/lantiq/patches-3.3/0016-falcon-VPE-softdog.patch

1From 79bbd1bfeb1dd9c66dd81605611d8d1db3e81822 Mon Sep 17 00:00:00 2001
2From: John Crispin <blogic@openwrt.org>
3Date: Thu, 29 Sep 2011 21:29:14 +0200
4Subject: [PATCH 16/25] 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
13diff --git a/arch/mips/include/asm/mach-lantiq/falcon/vpe.h b/arch/mips/include/asm/mach-lantiq/falcon/vpe.h
14new file mode 100644
15index 0000000..22a701b
16--- /dev/null
17+++ b/arch/mips/include/asm/mach-lantiq/falcon/vpe.h
18@@ -0,0 +1,44 @@
19+/*
20+ * This program is free software; you can redistribute it and/or modify
21+ * it under the terms of the GNU General Public License as published by
22+ * the Free Software Foundation; either version 2 of the License, or
23+ * (at your option) any later version.
24+ *
25+ * This program is distributed in the hope that it will be useful,
26+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
27+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28+ * GNU General Public License for more details.
29+ *
30+ * You should have received a copy of the GNU General Public License
31+ * along with this program; if not, write to the Free Software
32+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
33+ *
34+ * Copyright (C) 2005 infineon
35+ * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
36+ *
37+ */
38+#ifndef _IFXMIPS_VPE_H__
39+#define _IFXMIPS_VPE_H__
40+
41+/* For the explanation of the APIs please refer the section "MT APRP Kernel
42+ * Programming" in AR9 SW Architecture Specification
43+ */
44+int32_t vpe1_sw_start(void* sw_start_addr, uint32_t tcmask, uint32_t flags);
45+int32_t vpe1_sw_stop(uint32_t flags);
46+uint32_t vpe1_get_load_addr (uint32_t flags);
47+uint32_t vpe1_get_max_mem (uint32_t flags);
48+
49+int32_t vpe1_set_boot_param(char *field, char *value, char flags);
50+int32_t vpe1_get_boot_param(char *field, char **value, char flags);
51+
52+/* Watchdog APIs */
53+extern unsigned long vpe1_wdog_ctr;
54+extern unsigned long vpe1_wdog_timeout;
55+
56+unsigned long vpe1_sw_wdog_start(unsigned long);
57+unsigned long vpe1_sw_wdog_stop(unsigned long);
58+
59+typedef int (*VPE_SW_WDOG_RESET)(unsigned long wdog_cleared_ok_count);
60+int32_t vpe1_sw_wdog_register_reset_handler(VPE_SW_WDOG_RESET reset_fn);
61+
62+#endif
63diff --git a/arch/mips/lantiq/falcon/softdog_vpe.c b/arch/mips/lantiq/falcon/softdog_vpe.c
64new file mode 100644
65index 0000000..85d22a2
66--- /dev/null
67+++ b/arch/mips/lantiq/falcon/softdog_vpe.c
68@@ -0,0 +1,109 @@
69+/*
70+** =============================================================================
71+** FILE NAME : softdog_vpe.c
72+** MODULES : LXDB
73+** DATE : 24-03-2008
74+** AUTHOR : LXDB Team
75+** DESCRIPTION : This header file contains the code for the watchdog
76+** implentation on vpe1 side.
77+** REFERENCES :
78+** COPYRIGHT : Copyright (c) 2008
79+** Am Campeon 1-12, 85579 Neubiberg, Germany
80+** Any use of this software is subject to the conclusion of a respective
81+** License agreement. Without such a License agreement no rights to the
82+** software are granted
83+**
84+** HISTORY :
85+** $Date $Author $Comment
86+** 24-03-2008 LXDB Initial version
87+** ============================================================================
88+*/
89+
90+#include <linux/module.h>
91+#include <linux/moduleparam.h>
92+#include <linux/types.h>
93+#include <linux/timer.h>
94+#include <linux/reboot.h>
95+#include <linux/init.h>
96+#include <linux/jiffies.h>
97+
98+#include <falcon/vpe.h>
99+
100+static unsigned long last_wdog_value;
101+static unsigned long vpe1_wdog_cleared;
102+
103+static unsigned long vpe1_wdog_dead;
104+static void watchdog_vpe0_fire(unsigned long); /* Called when vpe0 timer expires */
105+static void keep_alive_vpe0(unsigned long);
106+VPE_SW_WDOG_RESET reset_local_fn;
107+
108+
109+static struct timer_list watchdog_vpe0_ticktock =
110+ TIMER_INITIALIZER(watchdog_vpe0_fire, 0, 0);
111+
112+static void watchdog_vpe0_fire (unsigned long flags)
113+{
114+ volatile unsigned long *wdog_ctr_value;
115+ wdog_ctr_value = (void*)vpe1_wdog_ctr;
116+ if (*wdog_ctr_value == last_wdog_value) { /* VPE1 watchdog expiry handling */
117+ vpe1_sw_wdog_stop(flags);
118+ vpe1_wdog_dead++;
119+ printk(KERN_DEBUG "VPE1 watchdog reset handler called\n");
120+ /* Call the reset handler function */
121+ reset_local_fn(flags);
122+ } else { /* Everything is OK on vpe1 side. Continue. */
123+ last_wdog_value = *wdog_ctr_value;
124+ vpe1_wdog_cleared++;
125+ keep_alive_vpe0(flags);
126+ }
127+}
128+
129+int32_t vpe1_sw_wdog_register_reset_handler (VPE_SW_WDOG_RESET reset_fn)
130+{
131+ reset_local_fn = (VPE_SW_WDOG_RESET)reset_fn;
132+ return 0;
133+}
134+
135+static void keep_alive_vpe0(unsigned long flags)
136+{
137+ mod_timer(&watchdog_vpe0_ticktock, jiffies+ vpe1_wdog_timeout );
138+}
139+
140+unsigned long vpe1_sw_wdog_start(unsigned long flags)
141+{
142+ volatile unsigned long *wdog_ctr_value;
143+ wdog_ctr_value = (void*)vpe1_wdog_ctr;
144+ *wdog_ctr_value = 0;
145+ last_wdog_value = 0;
146+ keep_alive_vpe0(flags);
147+ return 0;
148+}
149+
150+unsigned long vpe1_sw_wdog_stop(unsigned long flags)
151+{
152+ del_timer(&watchdog_vpe0_ticktock);
153+ return 0;
154+}
155+
156+static int __init watchdog_vpe1_init(void)
157+{
158+ /* Nothing to be done here */
159+ return 0;
160+}
161+
162+static void __exit watchdog_vpe1_exit(void)
163+{
164+ unsigned long flags=0;
165+ vpe1_sw_wdog_stop(flags);
166+}
167+
168+module_init(watchdog_vpe1_init);
169+module_exit(watchdog_vpe1_exit);
170+
171+EXPORT_SYMBOL(vpe1_sw_wdog_register_reset_handler);
172+EXPORT_SYMBOL(vpe1_sw_wdog_start);
173+EXPORT_SYMBOL(vpe1_sw_wdog_stop);
174+
175+MODULE_AUTHOR("LXDB");
176+MODULE_DESCRIPTION("Software Watchdog For VPE1");
177+MODULE_LICENSE("GPL");
178--
1791.7.9.1
180
181

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