diff options
| -rw-r--r-- | Makefile | 2 | ||||
| -rw-r--r-- | README | 8 | ||||
| -rw-r--r-- | drivers/serial/ns16550.c | 2 | ||||
| -rw-r--r-- | include/configs/igep00x0.h | 4 |
4 files changed, 15 insertions, 1 deletions
@@ -869,7 +869,7 @@ clobber: tidy @rm -f $(obj)nand_spl/{u-boot-nand_spl.lds,u-boot-spl,u-boot-spl.map} @rm -f $(obj)spl/{u-boot-spl,u-boot-spl.bin,u-boot-spl.map} @rm -f $(obj)spl/{u-boot-spl.lds,u-boot.lst} - @rm -f $(obj)MLO + @rm -f $(obj)MLO MLO.byteswap @rm -f $(obj)SPL @rm -f $(obj)tools/xway-swap-bytes @rm -f $(obj)arch/powerpc/cpu/mpc824x/bedbug_603e.c @@ -616,6 +616,14 @@ The following options need to be configured: boot loader that has already initialized the UART. Define this variable to flush the UART at init time. + CONFIG_SYS_NS16550_BROKEN_TEMT + + 16550 UART set the Transmitter Empty (TEMT) Bit when all output + has finished and the transmitter is totally empty. U-Boot waits + for this bit to be set to initialize the serial console. On some + broken platforms this bit is not set in SPL making U-Boot to + hang while waiting for TEMT. Define this option to avoid it. + - Console Interface: Depending on board, define exactly one serial port diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index bbd91ca247..87a0917086 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -36,8 +36,10 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) { +#if (!defined(CONFIG_SYS_NS16550_BROKEN_TEMT)) while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT)) ; +#endif serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier); #if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \ diff --git a/include/configs/igep00x0.h b/include/configs/igep00x0.h index 43dd06e246..f8131b1baf 100644 --- a/include/configs/igep00x0.h +++ b/include/configs/igep00x0.h @@ -67,6 +67,9 @@ #define CONFIG_SYS_NS16550_REG_SIZE (-4) #define CONFIG_SYS_NS16550_CLK V_NS16550_CLK +/* define to avoid U-Boot to hang while waiting for TEMT */ +#define CONFIG_SYS_NS16550_BROKEN_TEMT + /* select serial console configuration */ #define CONFIG_CONS_INDEX 3 #define CONFIG_SYS_NS16550_COM3 OMAP34XX_UART3 @@ -312,6 +315,7 @@ #define CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 1 #define CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME "u-boot.img" +#define CONFIG_SPL_BOARD_INIT #define CONFIG_SPL_LIBCOMMON_SUPPORT #define CONFIG_SPL_LIBDISK_SUPPORT #define CONFIG_SPL_I2C_SUPPORT |