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Diffstat (limited to 'target/linux/lantiq/patches/106-early_printk.patch')
-rw-r--r--target/linux/lantiq/patches/106-early_printk.patch93
1 files changed, 93 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches/106-early_printk.patch b/target/linux/lantiq/patches/106-early_printk.patch
new file mode 100644
index 0000000000..34e0bdf4d2
--- /dev/null
+++ b/target/linux/lantiq/patches/106-early_printk.patch
@@ -0,0 +1,93 @@
+--- a/arch/mips/lantiq/Kconfig
++++ b/arch/mips/lantiq/Kconfig
+@@ -33,4 +33,19 @@ endchoice
+ source "arch/mips/lantiq/falcon/Kconfig"
+ source "arch/mips/lantiq/xway/Kconfig"
+
++if EARLY_PRINTK
++choice
++ prompt "Early printk port"
++ default LANTIQ_PROM_ASC1
++ help
++ Choose which serial port is used, until the console driver is loaded
++
++config LANTIQ_PROM_ASC0
++ bool "ASC0"
++
++config LANTIQ_PROM_ASC1
++ bool "ASC1"
++endchoice
++endif
++
+ endif
+--- /dev/null
++++ b/arch/mips/lantiq/early_printk.c
+@@ -0,0 +1,68 @@
++/*
++ * 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/init.h>
++#include <linux/cpu.h>
++
++#include <lantiq.h>
++
++#ifdef CONFIG_SOC_LANTIQ_XWAY
++#include <xway.h>
++#ifdef CONFIG_LANTIQ_PROM_ASC0
++#define LQ_ASC_BASE KSEG1ADDR(LQ_ASC0_BASE)
++#else
++#define LQ_ASC_BASE KSEG1ADDR(LQ_ASC1_BASE)
++#endif
++
++#elif CONFIG_SOC_LANTIQ_FALCON
++#include <falcon/gpon_reg_base.h>
++#ifdef CONFIG_LANTIQ_PROM_ASC0
++#define LQ_ASC_BASE GPON_ASC0_BASE
++#else
++#define LQ_ASC_BASE GPON_ASC1_BASE
++#endif
++
++#endif
++
++#define ASC_BUF 1024
++#define LQ_ASC_FSTAT 0x0048
++#define LQ_ASC_TBUF 0x0020
++#define TXMASK 0x3F00
++#define TXOFFSET 8
++
++static char buf[ASC_BUF];
++
++void
++prom_putchar(char c)
++{
++ unsigned long flags;
++
++ local_irq_save(flags);
++ while ((lq_r32((u32 *)(LQ_ASC_BASE + LQ_ASC_FSTAT)) & TXMASK) >> TXOFFSET);
++
++ if (c == '\n')
++ lq_w32('\r', (u32 *)(LQ_ASC_BASE + LQ_ASC_TBUF));
++ lq_w32(c, (u32 *)(LQ_ASC_BASE + LQ_ASC_TBUF));
++ local_irq_restore(flags);
++}
++
++void
++early_printf(const char *fmt, ...)
++{
++ va_list args;
++ int l;
++ char *p, *buf_end;
++
++ va_start(args, fmt);
++ l = vsnprintf(buf, ASC_BUF, fmt, args);
++ va_end(args);
++ buf_end = buf + l;
++
++ for (p = buf; p < buf_end; p++)
++ prom_putchar(*p);
++}