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-rw-r--r--arch/mips/lemote/lm2e/dbg_io.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/arch/mips/lemote/lm2e/dbg_io.c b/arch/mips/lemote/lm2e/dbg_io.c
new file mode 100644
index 00000000000..6c95da3ca76
--- /dev/null
+++ b/arch/mips/lemote/lm2e/dbg_io.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ * Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org)
+ *
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * 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/io.h>
+#include <linux/init.h>
+#include <linux/types.h>
+
+#include <asm/serial.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 === */
+#ifdef CONFIG_64BIT
+#define BASE (0xffffffffbfd003f8)
+#else
+#define BASE (0xbfd003f8)
+#endif
+
+#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;
+}