diff options
Diffstat (limited to 'arch/mips/lantiq/early_printk.c')
| -rw-r--r-- | arch/mips/lantiq/early_printk.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/mips/lantiq/early_printk.c b/arch/mips/lantiq/early_printk.c new file mode 100644 index 000000000..9b28d0940 --- /dev/null +++ b/arch/mips/lantiq/early_printk.c @@ -0,0 +1,32 @@ +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * Copyright (C) 2010 John Crispin <blogic@openwrt.org> + */ + +#include <linux/cpu.h> +#include <lantiq_soc.h> + +#define ASC_BUF 1024 +#define LTQ_ASC_FSTAT ((u32 *)(LTQ_EARLY_ASC + 0x0048)) +#ifdef __BIG_ENDIAN +#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020 + 3)) +#else +#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020)) +#endif +#define TXMASK 0x3F00 +#define TXOFFSET 8 + +void prom_putchar(char c) +{ + unsigned long flags; + + local_irq_save(flags); + do { } while ((ltq_r32(LTQ_ASC_FSTAT) & TXMASK) >> TXOFFSET); + if (c == '\n') + ltq_w8('\r', LTQ_ASC_TBUF); + ltq_w8(c, LTQ_ASC_TBUF); + local_irq_restore(flags); +} |