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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>
45 lines
1 KiB
C
45 lines
1 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
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*/
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#include <linux/mm.h>
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#include <linux/io.h>
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#include <linux/serial_reg.h>
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#include <asm/setup.h>
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#include "devices.h"
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#include "ar2315_regs.h"
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#include "ar5312_regs.h"
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static inline void prom_uart_wr(void __iomem *base, unsigned reg,
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unsigned char ch)
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{
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__raw_writel(ch, base + 4 * reg);
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}
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static inline unsigned char prom_uart_rr(void __iomem *base, unsigned reg)
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{
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return __raw_readl(base + 4 * reg);
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}
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void prom_putchar(char ch)
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{
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static void __iomem *base;
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if (unlikely(base == NULL)) {
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if (is_ar2315())
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base = (void __iomem *)(KSEG1ADDR(AR2315_UART0_BASE));
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else
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base = (void __iomem *)(KSEG1ADDR(AR5312_UART0_BASE));
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}
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while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
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;
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prom_uart_wr(base, UART_TX, (unsigned char)ch);
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while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
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;
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}
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