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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/mips/lantiq/early_printk.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/mips/lantiq/early_printk.c')
-rw-r--r-- | arch/mips/lantiq/early_printk.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/mips/lantiq/early_printk.c b/arch/mips/lantiq/early_printk.c new file mode 100644 index 0000000000..4e4a28be1d --- /dev/null +++ b/arch/mips/lantiq/early_printk.c @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * + * Copyright (C) 2010 John Crispin <john@phrozen.org> + */ + +#include <linux/cpu.h> +#include <lantiq_soc.h> +#include <asm/setup.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); +} |