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| author | wanzongshun <mcuos.com@gmail.com> | 2009-12-18 18:00:37 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-12-22 15:32:32 +0000 |
| commit | 040f04598c6f494796815a4fc203379ff9fb847e (patch) | |
| tree | 8136270a5174eee4a2e47be8cf62bd743b6a5b51 | |
| parent | d76cdf2394df98383a21cbd0777234956aac2a18 (diff) | |
| download | linux-040f04598c6f494796815a4fc203379ff9fb847e.tar.gz linux-040f04598c6f494796815a4fc203379ff9fb847e.tar.bz2 linux-040f04598c6f494796815a4fc203379ff9fb847e.zip | |
ARM: 5855/1: putc support for nuc900
putc support for nuc900
Signed-off-by: lijie <eltshanli@gmail.com>
Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mach-w90x900/include/mach/uncompress.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mach-w90x900/include/mach/uncompress.h b/arch/arm/mach-w90x900/include/mach/uncompress.h index 050d9fe5ae1b..56f1a74d7016 100644 --- a/arch/arm/mach-w90x900/include/mach/uncompress.h +++ b/arch/arm/mach-w90x900/include/mach/uncompress.h @@ -22,11 +22,21 @@ #include <mach/regs-serial.h> #include <mach/map.h> +#include <linux/serial_reg.h> #define arch_decomp_wdog() +#define TX_DONE (UART_LSR_TEMT | UART_LSR_THRE) +static volatile u32 * uart_base = (u32 *)UART0_PA; + static void putc(int ch) { + /* Check THRE and TEMT bits before we transmit the character. + */ + while ((uart_base[UART_LSR] & TX_DONE) != TX_DONE) + barrier(); + + *uart_base = ch; } static inline void flush(void) |