mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 06:57:57 +00:00
e744878636
Use 32-bit aligned I/O and update base UART address (remove +3 offset). Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com> SVN-Revision: 41699
71 lines
1.7 KiB
Diff
71 lines
1.7 KiB
Diff
--- /dev/null
|
|
+++ b/arch/mips/ar231x/early_printk.c
|
|
@@ -0,0 +1,46 @@
|
|
+/*
|
|
+ * 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 <juhosg@openwrt.org>
|
|
+ */
|
|
+
|
|
+#include <linux/mm.h>
|
|
+#include <linux/io.h>
|
|
+#include <linux/serial_reg.h>
|
|
+#include <asm/addrspace.h>
|
|
+
|
|
+#include <asm/mach-ar231x/ar2315_regs.h>
|
|
+#include <asm/mach-ar231x/ar5312_regs.h>
|
|
+#include "devices.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(unsigned char ch)
|
|
+{
|
|
+ static void __iomem *base;
|
|
+
|
|
+ if (unlikely(base == NULL)) {
|
|
+ if (is_2315())
|
|
+ base = (void __iomem *)(KSEG1ADDR(AR2315_UART0));
|
|
+ else
|
|
+ base = (void __iomem *)(KSEG1ADDR(AR531X_UART0));
|
|
+ }
|
|
+
|
|
+ while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
|
|
+ ;
|
|
+ prom_uart_wr(base, UART_TX, ch);
|
|
+ while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0)
|
|
+ ;
|
|
+}
|
|
+
|
|
--- a/arch/mips/ar231x/Makefile
|
|
+++ b/arch/mips/ar231x/Makefile
|
|
@@ -9,5 +9,8 @@
|
|
#
|
|
|
|
obj-y += board.o prom.o devices.o
|
|
+
|
|
+obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
|
|
+
|
|
obj-$(CONFIG_ATHEROS_AR5312) += ar5312.o
|
|
obj-$(CONFIG_ATHEROS_AR2315) += ar2315.o
|
|
--- a/arch/mips/Kconfig
|
|
+++ b/arch/mips/Kconfig
|
|
@@ -148,6 +148,7 @@ config ATHEROS_AR231X
|
|
select SYS_SUPPORTS_BIG_ENDIAN
|
|
select SYS_SUPPORTS_32BIT_KERNEL
|
|
select ARCH_REQUIRE_GPIOLIB
|
|
+ select SYS_HAS_EARLY_PRINTK
|
|
help
|
|
Support for AR231x and AR531x based boards
|
|
|