* 22-May-2003 BJD Created
* 08-Sep-2003 BJD Moved to linux v2.6
* 12-Mar-2004 BJD Updated header protection
+ * 12-Oct-2004 BJD Take account of debug uart configuration
+ * 15-Nov-2004 BJD Fixed uart configuration
+ * 22-Feb-2005 BJD Added watchdog to uncompress
+ * 04-Apr-2005 LCVR Added support to S3C2400 (no cpuid at GSTATUS1)
*/
#ifndef __ASM_ARCH_UNCOMPRESS_H
#define __ASM_ARCH_UNCOMPRESS_H
+#include <linux/config.h>
+
/* defines for UART registers */
#include "asm/arch/regs-serial.h"
+#include "asm/arch/regs-gpio.h"
+#include "asm/arch/regs-watchdog.h"
#include <asm/arch/map.h>
+/* working in physical space... */
+#undef S3C2410_GPIOREG
+#undef S3C2410_WDOGREG
+
+#define S3C2410_GPIOREG(x) ((S3C24XX_PA_GPIO + (x)))
+#define S3C2410_WDOGREG(x) ((S3C24XX_PA_WATCHDOG + (x)))
+
/* how many bytes we allow into the FIFO at a time in FIFO mode */
#define FIFO_MAX (14)
-#if 1
-#define uart_base S3C2410_PA_UART
-#else
-static unsigned int uart_base = S3C2410_PA_UART;
-#endif
+#define uart_base S3C24XX_PA_UART + (0x4000*CONFIG_S3C2410_LOWLEVEL_UART_PORT)
static __inline__ void
uart_wr(unsigned int reg, unsigned int val)
}
-/* currently we do not need the watchdog... */
-#define arch_decomp_wdog()
-
-
-static void error(char *err);
-
-static void
-arch_decomp_setup(void)
-{
- /* we may need to setup the uart(s) here if we are not running
- * on an BAST... the BAST will have left the uarts configured
- * after calling linux.
- */
-}
-
/* we can deal with the case the UARTs are being run
* in FIFO mode, so that we don't hold up our execution
* waiting for tx to happen...
*/
-static void
-putc(char ch)
+static void putc(int ch)
{
- if (ch == '\n')
- putc('\r'); /* expand newline to \r\n */
+ int cpuid = S3C2410_GSTATUS1_2410;
+
+#ifndef CONFIG_CPU_S3C2400
+ cpuid = *((volatile unsigned int *)S3C2410_GSTATUS1);
+ cpuid &= S3C2410_GSTATUS1_IDMASK;
+#endif
if (uart_rd(S3C2410_UFCON) & S3C2410_UFCON_FIFOMODE) {
int level;
while (1) {
level = uart_rd(S3C2410_UFSTAT);
- level &= S3C2410_UFSTAT_TXMASK;
- level >>= S3C2410_UFSTAT_TXSHIFT;
+
+ if (cpuid == S3C2410_GSTATUS1_2440) {
+ level &= S3C2440_UFSTAT_TXMASK;
+ level >>= S3C2440_UFSTAT_TXSHIFT;
+ } else {
+ level &= S3C2410_UFSTAT_TXMASK;
+ level >>= S3C2410_UFSTAT_TXSHIFT;
+ }
if (level < FIFO_MAX)
break;
} else {
/* not using fifos */
- while ((uart_rd(S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXFE) != S3C2410_UTRSTAT_TXFE);
+ while ((uart_rd(S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE) != S3C2410_UTRSTAT_TXE)
+ barrier();
}
/* write byte to transmission register */
uart_wr(S3C2410_UTXH, ch);
}
+static inline void flush(void)
+{
+}
+
+#define __raw_writel(d,ad) do { *((volatile unsigned int *)(ad)) = (d); } while(0)
+
+/* CONFIG_S3C2410_BOOT_WATCHDOG
+ *
+ * Simple boot-time watchdog setup, to reboot the system if there is
+ * any problem with the boot process
+*/
+
+#ifdef CONFIG_S3C2410_BOOT_WATCHDOG
+
+#define WDOG_COUNT (0xff00)
+
+static inline void arch_decomp_wdog(void)
+{
+ __raw_writel(WDOG_COUNT, S3C2410_WTCNT);
+}
+
+static void arch_decomp_wdog_start(void)
+{
+ __raw_writel(WDOG_COUNT, S3C2410_WTDAT);
+ __raw_writel(WDOG_COUNT, S3C2410_WTCNT);
+ __raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x40), S3C2410_WTCON);
+}
+
+#else
+#define arch_decomp_wdog_start()
+#define arch_decomp_wdog()
+#endif
+
+#ifdef CONFIG_S3C2410_BOOT_ERROR_RESET
+
+static void arch_decomp_error(const char *x)
+{
+ putstr("\n\n");
+ putstr(x);
+ putstr("\n\n -- System resetting\n");
+
+ __raw_writel(0x4000, S3C2410_WTDAT);
+ __raw_writel(0x4000, S3C2410_WTCNT);
+ __raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x40), S3C2410_WTCON);
+
+ while(1);
+}
+
+#define arch_error arch_decomp_error
+#endif
+
+static void error(char *err);
+
static void
-putstr(const char *ptr)
+arch_decomp_setup(void)
{
- for (; *ptr != '\0'; ptr++) {
- putc(*ptr);
- }
+ /* we may need to setup the uart(s) here if we are not running
+ * on an BAST... the BAST will have left the uarts configured
+ * after calling linux.
+ */
+
+ arch_decomp_wdog_start();
}
+
#endif /* __ASM_ARCH_UNCOMPRESS_H */