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45 lines
1.0 KiB
45 lines
1.0 KiB
/* |
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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 <[email protected]> |
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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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