5c93316c8c
prom_putchar() is used centrally in early printk infrastructure therefore
at least MIPS should agree on the function return type.
[paul.burton@mips.com:
- Include linux/types.h in asm/setup.h to gain the bool typedef before
we start include asm/setup.h elsewhere.
- Include asm/setup.h in all files that use or define prom_putchar().
- Also standardise on signed rather than unsigned char argument.]
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/19842/
Cc: linux-mips@linux-mips.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Jonas Gorski <jonas.gorski@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
46 lines
1.0 KiB
C
46 lines
1.0 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
|
|
*/
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/io.h>
|
|
#include <linux/serial_reg.h>
|
|
#include <asm/setup.h>
|
|
|
|
#include "devices.h"
|
|
#include "ar2315_regs.h"
|
|
#include "ar5312_regs.h"
|
|
|
|
static inline void prom_uart_wr(void __iomem *base, unsigned reg,
|
|
unsigned char ch)
|
|
{
|
|
__raw_writel(ch, base + 4 * reg);
|
|
}
|
|
|
|
static inline unsigned char prom_uart_rr(void __iomem *base, unsigned reg)
|
|
{
|
|
return __raw_readl(base + 4 * reg);
|
|
}
|
|
|
|
void prom_putchar(char ch)
|
|
{
|
|
static void __iomem *base;
|
|
|
|
if (unlikely(base == NULL)) {
|
|
if (is_ar2315())
|
|
base = (void __iomem *)(KSEG1ADDR(AR2315_UART0_BASE));
|
|
else
|
|
base = (void __iomem *)(KSEG1ADDR(AR5312_UART0_BASE));
|
|
}
|
|
|
|
while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
|
|
;
|
|
prom_uart_wr(base, UART_TX, (unsigned char)ch);
|
|
while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
|
|
;
|
|
}
|