From: Wu Zhangjin <wuzj@xxxxxxxxxx>
this is originally from the lm2e-fixes branch of Philippe's
git://git.linux-cisco.org/linux-mips.git
Signed-off-by: Wu Zhangjin <wuzhangjin@xxxxxxxxx>
---
arch/mips/loongson/fuloong-2e/Makefile | 7 +-
arch/mips/loongson/fuloong-2e/dbg_io.c | 151 --------------------------
arch/mips/loongson/fuloong-2e/early_printk.c | 28 +++++
3 files changed, 34 insertions(+), 152 deletions(-)
delete mode 100644 arch/mips/loongson/fuloong-2e/dbg_io.c
create mode 100644 arch/mips/loongson/fuloong-2e/early_printk.c
diff --git a/arch/mips/loongson/fuloong-2e/Makefile b/arch/mips/loongson/fuloong-2e/Makefile
index 796e729..035e04c 100644
--- a/arch/mips/loongson/fuloong-2e/Makefile
+++ b/arch/mips/loongson/fuloong-2e/Makefile
@@ -3,6 +3,11 @@
#
obj-y += setup.o init.o cmdline.o time.o reset.o irq.o \
- pci.o bonito-irq.o dbg_io.o mem.o misc.o
+ pci.o bonito-irq.o mem.o misc.o
+
+#
+# Early printk support
+#
+obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/loongson/fuloong-2e/dbg_io.c b/arch/mips/loongson/fuloong-2e/dbg_io.c
deleted file mode 100644
index 1ace08f..0000000
--- a/arch/mips/loongson/fuloong-2e/dbg_io.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * Copyright 2001 MontaVista Software Inc.
- * Author: Jun Sun, jsun@xxxxxxxxxx or jsun@xxxxxxxxxx
- * Copyright (C) 2000, 2001 Ralf Baechle (ralf@xxxxxxx)
- *
- * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
- * Author: Fuxin Zhang, zhangfx@xxxxxxxxxx
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/types.h>
-
-#include <asm/serial.h>
-
-#include <loongson.h>
-#include <machine.h>
-
-#define UART16550_BAUD_2400 2400
-#define UART16550_BAUD_4800 4800
-#define UART16550_BAUD_9600 9600
-#define UART16550_BAUD_19200 19200
-#define UART16550_BAUD_38400 38400
-#define UART16550_BAUD_57600 57600
-#define UART16550_BAUD_115200 115200
-
-#define UART16550_PARITY_NONE 0
-#define UART16550_PARITY_ODD 0x08
-#define UART16550_PARITY_EVEN 0x18
-#define UART16550_PARITY_MARK 0x28
-#define UART16550_PARITY_SPACE 0x38
-
-#define UART16550_DATA_5BIT 0x0
-#define UART16550_DATA_6BIT 0x1
-#define UART16550_DATA_7BIT 0x2
-#define UART16550_DATA_8BIT 0x3
-
-#define UART16550_STOP_1BIT 0x0
-#define UART16550_STOP_2BIT 0x4
-
-/* ----------------------------------------------------- */
-
-/* === CONFIG === */
-
-#define BASE ioremap_nocache(LOONGSON_UART_BASE, 8)
-
-#define MAX_BAUD BASE_BAUD
-/* === END OF CONFIG === */
-
-#define REG_OFFSET 1
-
-/* register offset */
-#define OFS_RCV_BUFFER 0
-#define OFS_TRANS_HOLD 0
-#define OFS_SEND_BUFFER 0
-#define OFS_INTR_ENABLE (1*REG_OFFSET)
-#define OFS_INTR_ID (2*REG_OFFSET)
-#define OFS_DATA_FORMAT (3*REG_OFFSET)
-#define OFS_LINE_CONTROL (3*REG_OFFSET)
-#define OFS_MODEM_CONTROL (4*REG_OFFSET)
-#define OFS_RS232_OUTPUT (4*REG_OFFSET)
-#define OFS_LINE_STATUS (5*REG_OFFSET)
-#define OFS_MODEM_STATUS (6*REG_OFFSET)
-#define OFS_RS232_INPUT (6*REG_OFFSET)
-#define OFS_SCRATCH_PAD (7*REG_OFFSET)
-
-#define OFS_DIVISOR_LSB (0*REG_OFFSET)
-#define OFS_DIVISOR_MSB (1*REG_OFFSET)
-
-/* memory-mapped read/write of the port */
-#define UART16550_READ(y) readb((char *)BASE + (y))
-#define UART16550_WRITE(y, z) writeb(z, (char *)BASE + (y))
-
-void debugInit(u32 baud, u8 data, u8 parity, u8 stop)
-{
- u32 divisor;
-
- /* disable interrupts */
- UART16550_WRITE(OFS_INTR_ENABLE, 0);
-
- /* set up buad rate */
- /* set DIAB bit */
- UART16550_WRITE(OFS_LINE_CONTROL, 0x80);
-
- /* set divisor */
- divisor = MAX_BAUD / baud;
- UART16550_WRITE(OFS_DIVISOR_LSB, divisor & 0xff);
- UART16550_WRITE(OFS_DIVISOR_MSB, (divisor & 0xff00) >> 8);
-
- /* clear DIAB bit */
- UART16550_WRITE(OFS_LINE_CONTROL, 0x0);
-
- /* set data format */
- UART16550_WRITE(OFS_DATA_FORMAT, data | parity | stop);
-}
-
-static int remoteDebugInitialized;
-
-u8 getDebugChar(void)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(UART16550_BAUD_115200,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE, UART16550_STOP_1BIT);
- }
-
- while ((UART16550_READ(OFS_LINE_STATUS) & 0x1) == 0)
- ;
- return UART16550_READ(OFS_RCV_BUFFER);
-}
-
-int putDebugChar(u8 byte)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- /*
- debugInit(UART16550_BAUD_115200,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE, UART16550_STOP_1BIT); */
- }
-
- while ((UART16550_READ(OFS_LINE_STATUS) & 0x20) == 0)
- ;
- UART16550_WRITE(OFS_SEND_BUFFER, byte);
- return 1;
-}
-
-void prom_putchar(char c)
-{
- putDebugChar(c);
-}
diff --git a/arch/mips/loongson/fuloong-2e/early_printk.c b/arch/mips/loongson/fuloong-2e/early_printk.c
new file mode 100644
index 0000000..9f4b881
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/early_printk.c
@@ -0,0 +1,28 @@
+/* early printk support
+ *
+ * Copyright (c) 2009 Philippe Vachon <philippe@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/serial_reg.h>
+
+#include <loongson.h>
+#include <machine.h>
+
+void prom_putchar(char c)
+{
+ int timeout;
+ phys_addr_t uart_base =
+ (phys_addr_t) ioremap_nocache(LOONGSON_UART_BASE, 8);
+ char reg = readb((u8 *) (uart_base + UART_LSR)) & UART_LSR_THRE;
+
+ for (timeout = 1024; reg == 0 && timeout > 0; timeout--)
+ reg = readb((u8 *) (uart_base + UART_LSR)) & UART_LSR_THRE;
+
+ writeb(c, (u8 *) (uart_base + UART_TX));
+}
--
1.6.0.4
