[U-Boot] [PATCH] sh: Add support watchdog for SH4A core
Nobuhiro Iwamatsu
iwamatsu at nigauri.org
Thu Sep 18 11:47:35 CEST 2008
Add support watchdog for SH4A core (SH7763, SH7780 and SH7785).
And fix some compile warning.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
---
cpu/sh4/watchdog.c | 48 ++++++++++++++++++++--------
lib_sh/board.c | 89 +++++++++++++++++++++++++++++++---------------------
2 files changed, 87 insertions(+), 50 deletions(-)
diff --git a/cpu/sh4/watchdog.c b/cpu/sh4/watchdog.c
index 346e217..6fbb069 100644
--- a/cpu/sh4/watchdog.c
+++ b/cpu/sh4/watchdog.c
@@ -17,32 +17,52 @@
#include <common.h>
#include <asm/processor.h>
+#include <asm/io.h>
#define WDT_BASE WTCNT
-static unsigned char cnt_read (void){
- return *((volatile unsigned char *)(WDT_BASE + 0x00));
+#define WDT_WD (1 << 6)
+#define WDT_RST_P (0)
+#define WDT_RST_M (1 << 5)
+#define WDT_ENABLE (1 << 7)
+
+#if defined(CONFIG_WATCHDOG)
+static unsigned char csr_read (void)
+{
+ return inb(WDT_BASE + 0x04);
}
-static unsigned char csr_read (void){
- return *((volatile unsigned char *)(WDT_BASE + 0x04));
+static void cnt_write (unsigned char value)
+{
+ outl((unsigned short)value | 0x5A00, WDT_BASE + 0x00);
}
-static void cnt_write (unsigned char value){
- while (csr_read() & (1 << 5)) {
- /* delay */
- }
- *((volatile unsigned short *)(WDT_BASE + 0x00))
- = ((unsigned short) value) | 0x5A00;
+static void csr_write (unsigned char value)
+{
+ outl((unsigned short)value | 0xA500, WDT_BASE + 0x04);
}
-static void csr_write (unsigned char value){
- *((volatile unsigned short *)(WDT_BASE + 0x04))
- = ((unsigned short) value) | 0xA500;
+void watchdog_reset(void)
+{
+ outl(0x55000000, WDT_BASE + 0x08);
}
+int watchdog_init (void)
+{
+ /* Set overflow time*/
+ cnt_write(0);
+ /* Power on reset */
+ csr_write(WDT_WD|WDT_RST_P|WDT_ENABLE);
+
+ return 0;
+}
-int watchdog_init (void){ return 0; }
+int watchdog_disable (void)
+{
+ csr_write(csr_read() & ~WDT_ENABLE);
+ return 0;
+}
+#endif
void reset_cpu (unsigned long ignored)
{
diff --git a/lib_sh/board.c b/lib_sh/board.c
index eb81bd9..c678120 100644
--- a/lib_sh/board.c
+++ b/lib_sh/board.c
@@ -23,6 +23,7 @@
#include <malloc.h>
#include <devices.h>
#include <version.h>
+#include <watchdog.h>
#include <net.h>
#include <environment.h>
@@ -30,7 +31,6 @@ extern void malloc_bin_reloc (void);
extern int cpu_init(void);
extern int board_init(void);
extern int dram_init(void);
-extern int watchdog_init(void);
extern int timer_init(void);
const char version_string[] = U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
@@ -70,37 +70,45 @@ static int sh_flash_init(void)
DECLARE_GLOBAL_DATA_PTR;
gd->bd->bi_flashsize = flash_init();
- printf("FLASH: %dMB\n", gd->bd->bi_flashsize / (1024*1024));
+ printf("FLASH: %ldMB\n", gd->bd->bi_flashsize / (1024*1024));
return 0;
}
#if defined(CONFIG_CMD_NAND)
-#include <nand.h>
-static int sh_nand_init(void)
-{
- printf("NAND: ");
- nand_init(); /* go init the NAND */
- return 0;
-}
+# include <nand.h>
+# define INIT_FUNC_NAND_INIT nand_init,
+#else
+# define INIT_FUNC_NAND_INIT
#endif /* CONFIG_CMD_NAND */
+#if defined(CONFIG_WATCHDOG)
+extern int watchdog_init(void);
+extern int watchdog_disable(void);
+# define INIT_FUNC_WATCHDOG_INIT watchdog_init,
+# define WATCHDOG_DISABLE watchdog_disable
+#else
+# define INIT_FUNC_WATCHDOG_INIT
+# define WATCHDOG_DISABLE
+#endif /* CONFIG_WATCHDOG */
+
#if defined(CONFIG_CMD_IDE)
-#include <ide.h>
-static int sh_marubun_init(void)
-{
- puts ("IDE: ");
- ide_init();
- return 0;
-}
-#endif /* (CONFIG_CMD_IDE) */
+# include <ide.h>
+# define INIT_FUNC_IDE_INIT ide_init,
+#else
+# define INIT_FUNC_IDE_INIT
+#endif /* CONFIG_CMD_IDE */
#if defined(CONFIG_PCI)
+#include <pci.h>
static int sh_pci_init(void)
{
pci_init();
return 0;
}
+# define INIT_FUNC_PCI_INIT sh_pci_init,
+#else
+# define INIT_FUNC_PCI_INIT
#endif /* CONFIG_PCI */
static int sh_mem_env_init(void)
@@ -136,24 +144,20 @@ init_fnc_t *init_sequence[] =
{
cpu_init, /* basic cpu dependent setup */
board_init, /* basic board dependent setup */
- interrupt_init, /* set up exceptions */
+ interrupt_init, /* set up exceptions */
env_init, /* event init */
- serial_init, /* SCIF init */
- watchdog_init, /* watchdog init */
+ serial_init, /* SCIF init */
+ INIT_FUNC_WATCHDOG_INIT /* watchdog init */
console_init_f,
display_options,
checkcpu,
checkboard, /* Check support board */
dram_init, /* SDRAM init */
timer_init, /* SuperH Timer (TCNT0 only) init */
- sh_flash_init, /* Flash memory(NOR) init*/
+ sh_flash_init, /* Flash memory(NOR) init*/
sh_mem_env_init,
-#if defined(CONFIG_CMD_NAND)
- sh_nand_init, /* Flash memory (NAND) init */
-#endif
-#if defined(CONFIG_PCI)
- sh_pci_init, /* PCI Init */
-#endif
+ INIT_FUNC_NAND_INIT/* Flash memory (NAND) init */
+ INIT_FUNC_PCI_INIT /* PCI init */
devices_init,
console_init_r,
interrupt_init,
@@ -172,8 +176,6 @@ void sh_generic_init (void)
bd_t *bd;
init_fnc_t **init_fnc_ptr;
- int i;
- char *s;
memset (gd, 0, CFG_GBL_DATA_SIZE);
@@ -194,22 +196,37 @@ void sh_generic_init (void)
#endif
bd->bi_baudrate = CONFIG_BAUDRATE;
- for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr , i++) {
- if ((*init_fnc_ptr) () != 0) {
+ for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+ WATCHDOG_RESET();
+ if ((*init_fnc_ptr) () != 0)
hang();
- }
}
+#ifdef CONFIG_WATCHDOG
+ /* disable watchdog if environment is set */
+ {
+ char *s;
+ if ((s = getenv ("watchdog")) != NULL)
+ if (strncmp (s, "off", 3) == 0)
+ WATCHDOG_DISABLE ();
+ }
+#endif /* CONFIG_WATCHDOG*/
+
+
#if defined(CONFIG_CMD_NET)
- puts ("Net: ");
- eth_initialize(gd->bd);
+ {
+ char *s;
+ puts ("Net: ");
+ eth_initialize(gd->bd);
- if ((s = getenv ("bootfile")) != NULL) {
- copy_filename (BootFile, s, sizeof (BootFile));
+ if ((s = getenv ("bootfile")) != NULL) {
+ copy_filename (BootFile, s, sizeof (BootFile));
+ }
}
#endif /* CONFIG_CMD_NET */
while (1) {
+ WATCHDOG_RESET();
main_loop();
}
}
--
1.5.6.3
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