From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/mips/ath25/early_printk.c | 45 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 arch/mips/ath25/early_printk.c (limited to 'arch/mips/ath25/early_printk.c') diff --git a/arch/mips/ath25/early_printk.c b/arch/mips/ath25/early_printk.c new file mode 100644 index 0000000000..d534761e9c --- /dev/null +++ b/arch/mips/ath25/early_printk.c @@ -0,0 +1,45 @@ +/* + * 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 + */ + +#include +#include +#include +#include + +#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) + ; +} -- cgit v1.2.3