[PATCH] ARM: NUC900: Implements putc() which is needed when uncompressing linux

[Wan ZongShun]

Okay, thanks for your patch.

Acked-by:  Wan ZongShun <mcuos.com at gmail.com>


2009/12/3 Li Jie <eltshanli at gmail.com>:
> Hi,
>
> This patch implements the putc(), 'Uncompressing linux...done' can be
> outputs when booting zImage.
>
> Signed-off-by: lijie <eltshanli at gmail.com>
> ---
>  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 050d9fe..56f1a74 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)
> --
> 1.6.5.3
>



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