Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 180 insertions, 0 deletions

diff --git a/arch/mips/pmc-sierra/yosemite/dbg_io.c b/arch/mips/pmc-sierra/yosemite/dbg_io.c
new file mode 100644
index 000000000000..0f659c9106ac
--- /dev/null
+++ b/arch/mips/pmc-sierra/yosemite/dbg_io.c
@@ -0,0 +1,180 @@
+/*
+ * Copyright 2003 PMC-Sierra
+ * Author: Manish Lachwani (lachwani@pmc-sierra.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.
+ */
+
+/*
+ * Support for KGDB for the Yosemite board. We make use of single serial
+ * port to be used for KGDB as well as console. The second serial port
+ * seems to be having a problem. Single IRQ is allocated for both the
+ * ports. Hence, the interrupt routing code needs to figure out whether
+ * the interrupt came from channel A or B.
+ */
+
+#include <asm/serial.h>
+
+/*
+ * Baud rate, Parity, Data and Stop bit settings for the
+ * serial port on the Yosemite. Note that the Early printk
+ * patch has been added. So, we should be all set to go
+ */
+#define	YOSEMITE_BAUD_2400	2400
+#define	YOSEMITE_BAUD_4800	4800
+#define	YOSEMITE_BAUD_9600	9600
+#define	YOSEMITE_BAUD_19200	19200
+#define	YOSEMITE_BAUD_38400	38400
+#define	YOSEMITE_BAUD_57600	57600
+#define	YOSEMITE_BAUD_115200	115200
+
+#define	YOSEMITE_PARITY_NONE	0
+#define	YOSEMITE_PARITY_ODD	0x08
+#define	YOSEMITE_PARITY_EVEN	0x18
+#define	YOSEMITE_PARITY_MARK	0x28
+#define	YOSEMITE_PARITY_SPACE	0x38
+
+#define	YOSEMITE_DATA_5BIT	0x0
+#define	YOSEMITE_DATA_6BIT	0x1
+#define	YOSEMITE_DATA_7BIT	0x2
+#define	YOSEMITE_DATA_8BIT	0x3
+
+#define	YOSEMITE_STOP_1BIT	0x0
+#define	YOSEMITE_STOP_2BIT	0x4
+
+/* This is crucial */
+#define	SERIAL_REG_OFS		0x1
+
+#define	SERIAL_RCV_BUFFER	0x0
+#define	SERIAL_TRANS_HOLD	0x0
+#define	SERIAL_SEND_BUFFER	0x0
+#define	SERIAL_INTR_ENABLE	(1 * SERIAL_REG_OFS)
+#define	SERIAL_INTR_ID		(2 * SERIAL_REG_OFS)
+#define	SERIAL_DATA_FORMAT	(3 * SERIAL_REG_OFS)
+#define	SERIAL_LINE_CONTROL	(3 * SERIAL_REG_OFS)
+#define	SERIAL_MODEM_CONTROL	(4 * SERIAL_REG_OFS)
+#define	SERIAL_RS232_OUTPUT	(4 * SERIAL_REG_OFS)
+#define	SERIAL_LINE_STATUS	(5 * SERIAL_REG_OFS)
+#define	SERIAL_MODEM_STATUS	(6 * SERIAL_REG_OFS)
+#define	SERIAL_RS232_INPUT	(6 * SERIAL_REG_OFS)
+#define	SERIAL_SCRATCH_PAD	(7 * SERIAL_REG_OFS)
+
+#define	SERIAL_DIVISOR_LSB	(0 * SERIAL_REG_OFS)
+#define	SERIAL_DIVISOR_MSB	(1 * SERIAL_REG_OFS)
+
+/*
+ * Functions to READ and WRITE to serial port 0
+ */
+#define	SERIAL_READ(ofs)		(*((volatile unsigned char*)	\
+					(TITAN_SERIAL_BASE + ofs)))
+
+#define	SERIAL_WRITE(ofs, val)		((*((volatile unsigned char*)	\
+					(TITAN_SERIAL_BASE + ofs))) = val)
+
+/*
+ * Functions to READ and WRITE to serial port 1
+ */
+#define	SERIAL_READ_1(ofs)		(*((volatile unsigned char*)	\
+					(TITAN_SERIAL_BASE_1 + ofs)
+
+#define	SERIAL_WRITE_1(ofs, val)	((*((volatile unsigned char*)	\
+					(TITAN_SERIAL_BASE_1 + ofs))) = val)
+
+/*
+ * Second serial port initialization
+ */
+void init_second_port(void)
+{
+	/* Disable Interrupts */
+	SERIAL_WRITE_1(SERIAL_LINE_CONTROL, 0x0);
+	SERIAL_WRITE_1(SERIAL_INTR_ENABLE, 0x0);
+
+	{
+		unsigned int divisor;
+
+		SERIAL_WRITE_1(SERIAL_LINE_CONTROL, 0x80);
+		divisor = TITAN_SERIAL_BASE_BAUD / YOSEMITE_BAUD_115200;
+		SERIAL_WRITE_1(SERIAL_DIVISOR_LSB, divisor & 0xff);
+
+		SERIAL_WRITE_1(SERIAL_DIVISOR_MSB,
+			       (divisor & 0xff00) >> 8);
+		SERIAL_WRITE_1(SERIAL_LINE_CONTROL, 0x0);
+	}
+
+	SERIAL_WRITE_1(SERIAL_DATA_FORMAT, YOSEMITE_DATA_8BIT |
+		       YOSEMITE_PARITY_NONE | YOSEMITE_STOP_1BIT);
+
+	/* Enable Interrupts */
+	SERIAL_WRITE_1(SERIAL_INTR_ENABLE, 0xf);
+}
+
+/* Initialize the serial port for KGDB debugging */
+void debugInit(unsigned int baud, unsigned char data, unsigned char parity,
+	       unsigned char stop)
+{
+	/* Disable Interrupts */
+	SERIAL_WRITE(SERIAL_LINE_CONTROL, 0x0);
+	SERIAL_WRITE(SERIAL_INTR_ENABLE, 0x0);
+
+	{
+		unsigned int divisor;
+
+		SERIAL_WRITE(SERIAL_LINE_CONTROL, 0x80);
+
+		divisor = TITAN_SERIAL_BASE_BAUD / baud;
+		SERIAL_WRITE(SERIAL_DIVISOR_LSB, divisor & 0xff);
+
+		SERIAL_WRITE(SERIAL_DIVISOR_MSB, (divisor & 0xff00) >> 8);
+		SERIAL_WRITE(SERIAL_LINE_CONTROL, 0x0);
+	}
+
+	SERIAL_WRITE(SERIAL_DATA_FORMAT, data | parity | stop);
+}
+
+static int remoteDebugInitialized = 0;
+
+unsigned char getDebugChar(void)
+{
+	if (!remoteDebugInitialized) {
+		remoteDebugInitialized = 1;
+		debugInit(YOSEMITE_BAUD_115200,
+			  YOSEMITE_DATA_8BIT,
+			  YOSEMITE_PARITY_NONE, YOSEMITE_STOP_1BIT);
+	}
+
+	while ((SERIAL_READ(SERIAL_LINE_STATUS) & 0x1) == 0);
+	return SERIAL_READ(SERIAL_RCV_BUFFER);
+}
+
+int putDebugChar(unsigned char byte)
+{
+	if (!remoteDebugInitialized) {
+		remoteDebugInitialized = 1;
+		debugInit(YOSEMITE_BAUD_115200,
+			  YOSEMITE_DATA_8BIT,
+			  YOSEMITE_PARITY_NONE, YOSEMITE_STOP_1BIT);
+	}
+
+	while ((SERIAL_READ(SERIAL_LINE_STATUS) & 0x20) == 0);
+	SERIAL_WRITE(SERIAL_SEND_BUFFER, byte);
+
+	return 1;
+}