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/*
* Copyright (C) 2012
* Jean-Christophe PLAGNIOL-VILLARD <planioj@jcrosoft.com>
*
* Under GPLv2
*/
#ifndef __MACH_DEBUG_LL_H__
#define __MACH_DEBUG_LL_H__
#include <asm/io.h>
#include <mach/gpio.h>
#include <mach/hardware.h>
#include <mach/at91_dbgu.h>
#define ATMEL_US_CSR 0x0014
#define ATMEL_US_THR 0x001c
#define ATMEL_US_TXRDY (1 << 1)
#define ATMEL_US_TXEMPTY (1 << 9)
/*
* The following code assumes the serial port has already been
* initialized by the bootloader. If you didn't setup a port in
* your bootloader then nothing will appear (which might be desired).
*
* This does not append a newline
*/
static inline void at91_dbgu_putc(void __iomem *base, int c)
{
while (!(readl(base + ATMEL_US_CSR) & ATMEL_US_TXRDY))
barrier();
writel(c, base + ATMEL_US_THR);
while (!(readl(base + ATMEL_US_CSR) & ATMEL_US_TXEMPTY))
barrier();
}
static inline void PUTC_LL(char c)
{
at91_dbgu_putc(IOMEM(CONFIG_DEBUG_AT91_UART_BASE), c);
}
#endif
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