[MIPS] Support for the RM9000-based Basler eXcite smart camera platform.

Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 122 insertions, 0 deletions

diff --git a/arch/mips/basler/excite/excite_dbg_io.c b/arch/mips/basler/excite/excite_dbg_io.c
new file mode 100644
index 00000000000..83f6bddf578
--- /dev/null
+++ b/arch/mips/basler/excite/excite_dbg_io.c
@@ -0,0 +1,122 @@
+/*
+ *  Copyright (C) 2004 by Basler Vision Technologies AG
+ *  Author: Thomas Koeller <thomas.koeller@baslerweb.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 program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/gdb-stub.h>
+#include <asm/rm9k-ocd.h>
+#include <excite.h>
+
+#if defined(CONFIG_SERIAL_8250) && CONFIG_SERIAL_8250_NR_UARTS > 1
+#error Debug port used by serial driver
+#endif
+
+#define UART_CLK		25000000
+#define BASE_BAUD		(UART_CLK / 16)
+#define REGISTER_BASE_0		0x0208UL
+#define REGISTER_BASE_1		0x0238UL
+
+#define REGISTER_BASE_DBG	REGISTER_BASE_1
+
+#define CPRR	0x0004
+#define UACFG	0x0200
+#define UAINTS	0x0204
+#define UARBR	(REGISTER_BASE_DBG + 0x0000)
+#define UATHR	(REGISTER_BASE_DBG + 0x0004)
+#define UADLL	(REGISTER_BASE_DBG + 0x0008)
+#define UAIER	(REGISTER_BASE_DBG + 0x000c)
+#define UADLH	(REGISTER_BASE_DBG + 0x0010)
+#define UAIIR	(REGISTER_BASE_DBG + 0x0014)
+#define UAFCR	(REGISTER_BASE_DBG + 0x0018)
+#define UALCR	(REGISTER_BASE_DBG + 0x001c)
+#define UAMCR	(REGISTER_BASE_DBG + 0x0020)
+#define UALSR	(REGISTER_BASE_DBG + 0x0024)
+#define UAMSR	(REGISTER_BASE_DBG + 0x0028)
+#define UASCR	(REGISTER_BASE_DBG + 0x002c)
+
+#define	PARITY_NONE	0
+#define	PARITY_ODD	0x08
+#define	PARITY_EVEN	0x18
+#define	PARITY_MARK	0x28
+#define	PARITY_SPACE	0x38
+
+#define	DATA_5BIT	0x0
+#define	DATA_6BIT	0x1
+#define	DATA_7BIT	0x2
+#define	DATA_8BIT	0x3
+
+#define	STOP_1BIT	0x0
+#define	STOP_2BIT	0x4
+
+#define BAUD_DBG	57600
+#define	PARITY_DBG	PARITY_NONE
+#define	DATA_DBG	DATA_8BIT
+#define	STOP_DBG	STOP_1BIT
+
+/* Initialize the serial port for KGDB debugging */
+void __init excite_kgdb_init(void)
+{
+	const u32 divisor = BASE_BAUD / BAUD_DBG;
+
+	/* Take the UART out of reset */
+	titan_writel(0x00ff1cff, CPRR);
+	titan_writel(0x00000000, UACFG);
+	titan_writel(0x00000002, UACFG);
+
+	titan_writel(0x0, UALCR);
+	titan_writel(0x0, UAIER);
+
+	/* Disable FIFOs */
+	titan_writel(0x00, UAFCR);
+
+	titan_writel(0x80, UALCR);
+	titan_writel(divisor & 0xff, UADLL);
+	titan_writel((divisor & 0xff00) >> 8, UADLH);
+	titan_writel(0x0, UALCR);
+
+	titan_writel(DATA_DBG | PARITY_DBG | STOP_DBG, UALCR);
+
+	/* Enable receiver interrupt */
+	titan_readl(UARBR);
+	titan_writel(0x1, UAIER);
+}
+
+int getDebugChar(void)
+{
+	while (!(titan_readl(UALSR) & 0x1));
+	return titan_readl(UARBR);
+}
+
+int putDebugChar(int data)
+{
+	while (!(titan_readl(UALSR) & 0x20));
+	titan_writel(data, UATHR);
+	return 1;
+}
+
+/* KGDB interrupt handler */
+asmlinkage void excite_kgdb_inthdl(struct pt_regs *regs)
+{
+	if (unlikely(
+		((titan_readl(UAIIR) & 0x7) == 4)
+		&& ((titan_readl(UARBR) & 0xff) == 0x3)))
+			set_async_breakpoint(&regs->cp0_epc);
+}