[U-Boot] [PATCH v2] sh: Add support watchdog for SH4A core
Nobuhiro Iwamatsu
iwamatsu at nigauri.org
Thu Sep 18 12:10:13 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>
---
- Fix checkpatch warning
cpu/sh4/watchdog.c | 53 +++++++++++++++++-------
lib_sh/board.c | 115 ++++++++++++++++++++++++++++++----------------------
2 files changed, 104 insertions(+), 64 deletions(-)
diff --git a/cpu/sh4/watchdog.c b/cpu/sh4/watchdog.c
index 346e217..f692429 100644
--- a/cpu/sh4/watchdog.c
+++ b/cpu/sh4/watchdog.c
@@ -17,34 +17,55 @@
#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)
+void reset_cpu(unsigned long ignored)
{
- while(1);
+ while (1)
+ ;
}
diff --git a/lib_sh/board.c b/lib_sh/board.c
index eb81bd9..6dfab4e 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__ ")";
@@ -41,17 +41,17 @@ static unsigned long mem_malloc_start;
static unsigned long mem_malloc_end;
static unsigned long mem_malloc_brk;
-static void mem_malloc_init (void)
+static void mem_malloc_init(void)
{
mem_malloc_start = (TEXT_BASE - CFG_GBL_DATA_SIZE - CFG_MALLOC_LEN);
mem_malloc_end = (mem_malloc_start + CFG_MALLOC_LEN - 16);
mem_malloc_brk = mem_malloc_start;
- memset ((void *) mem_malloc_start, 0,
+ memset((void *) mem_malloc_start, 0,
(mem_malloc_end - mem_malloc_start));
}
-void *sbrk (ptrdiff_t increment)
+void *sbrk(ptrdiff_t increment)
{
unsigned long old = mem_malloc_brk;
unsigned long new = old + increment;
@@ -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)
@@ -123,7 +131,8 @@ static int sh_net_init(void)
s = getenv("ethaddr");
for (i = 0; i < 6; ++i) {
gd->bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
- if (s) s = (*e) ? e + 1 : e;
+ if (s)
+ s = (*e) ? e + 1 : e;
}
return 0;
@@ -136,24 +145,20 @@ 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,
@@ -166,20 +171,18 @@ init_fnc_t *init_sequence[] =
NULL /* Terminate this list */
};
-void sh_generic_init (void)
+void sh_generic_init(void)
{
DECLARE_GLOBAL_DATA_PTR;
bd_t *bd;
init_fnc_t **init_fnc_ptr;
- int i;
- char *s;
- memset (gd, 0, CFG_GBL_DATA_SIZE);
+ memset(gd, 0, CFG_GBL_DATA_SIZE);
gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
- gd->bd = (bd_t *) (gd + 1); /* At end of global data */
+ gd->bd = (bd_t *)(gd + 1); /* At end of global data */
gd->baudrate = CONFIG_BAUDRATE;
gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
@@ -189,35 +192,51 @@ void sh_generic_init (void)
bd->bi_memsize = CFG_SDRAM_SIZE;
bd->bi_flashstart = CFG_FLASH_BASE;
#if defined(CFG_SRAM_BASE) && defined(CFG_SRAM_SIZE)
- bd->bi_sramstart= CFG_SRAM_BASE;
+ bd->bi_sramstart = CFG_SRAM_BASE;
bd->bi_sramsize = CFG_SRAM_SIZE;
#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();
- }
}
-#if defined(CONFIG_CMD_NET)
- puts ("Net: ");
- eth_initialize(gd->bd);
+#ifdef CONFIG_WATCHDOG
+ /* disable watchdog if environment is set */
+ {
+ char *s = getenv("watchdog");
+ if (s != NULL)
+ if (strncmp(s, "off", 3) == 0)
+ WATCHDOG_DISABLE();
+ }
+#endif /* CONFIG_WATCHDOG*/
- if ((s = getenv ("bootfile")) != NULL) {
- copy_filename (BootFile, s, sizeof (BootFile));
+
+#if defined(CONFIG_CMD_NET)
+ {
+ char *s;
+ puts("Net: ");
+ eth_initialize(gd->bd);
+
+ s = getenv("bootfile");
+ if (s != NULL)
+ copy_filename(BootFile, s, sizeof(BootFile));
}
#endif /* CONFIG_CMD_NET */
while (1) {
+ WATCHDOG_RESET();
main_loop();
}
}
/***********************************************************************/
-void hang (void)
+void hang(void)
{
- puts ("Board ERROR\n");
- for (;;);
+ puts("Board ERROR\n");
+ for (;;)
+ ;
}
--
1.5.6.3
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