4 files changed, 227 insertions, 0 deletions
diff --git a/arch/xtensa/platforms/xt2000/Makefile b/arch/xtensa/platforms/xt2000/Makefile
new file mode 100644
index 000000000..53eaeba5e
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Tensilica XT2000 Emulation Board
+#
+
+obj-y 			= setup.o
diff --git a/arch/xtensa/platforms/xt2000/include/platform/hardware.h b/arch/xtensa/platforms/xt2000/include/platform/hardware.h
new file mode 100644
index 000000000..9f213f573
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/include/platform/hardware.h
@@ -0,0 +1,43 @@
+/*
+ * platform/hardware.h
+ *
+ * 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) 2001 Tensilica Inc.
+ */
+
+/*
+ * This file contains the hardware configuration of the XT2000 board.
+ */
+
+#ifndef _XTENSA_XT2000_HARDWARE_H
+#define _XTENSA_XT2000_HARDWARE_H
+
+#include <asm/core.h>
+
+/*
+ * On-board components.
+ */
+
+#define SONIC83934_INTNUM	XCHAL_EXTINT3_NUM
+#define SONIC83934_ADDR		IOADDR(0x0d030000)
+
+/*
+ * V3-PCI
+ */
+
+/* The XT2000 uses the V3 as a cascaded interrupt controller for the PCI bus */
+
+#define IRQ_PCI_A		(XCHAL_NUM_INTERRUPTS + 0)
+#define IRQ_PCI_B		(XCHAL_NUM_INTERRUPTS + 1)
+#define IRQ_PCI_C		(XCHAL_NUM_INTERRUPTS + 2)
+
+/*
+ * Various other components.
+ */
+
+#define XT2000_LED_ADDR		IOADDR(0x0d040000)
+
+#endif /* _XTENSA_XT2000_HARDWARE_H */
diff --git a/arch/xtensa/platforms/xt2000/include/platform/serial.h b/arch/xtensa/platforms/xt2000/include/platform/serial.h
new file mode 100644
index 000000000..cde804827
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/include/platform/serial.h
@@ -0,0 +1,28 @@
+/*
+ * platform/serial.h
+ *
+ * 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) 2001 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_XT2000_SERIAL_H
+#define _XTENSA_XT2000_SERIAL_H
+
+#include <asm/core.h>
+#include <asm/io.h>
+
+/*  National-Semi PC16552D DUART:  */
+
+#define DUART16552_1_INTNUM	XCHAL_EXTINT4_NUM
+#define DUART16552_2_INTNUM	XCHAL_EXTINT5_NUM
+
+#define DUART16552_1_ADDR	IOADDR(0x0d050020)	/* channel 1 */
+#define DUART16552_2_ADDR	IOADDR(0x0d050000)	/* channel 2 */
+
+#define DUART16552_XTAL_FREQ	18432000	/* crystal frequency in Hz */
+#define BASE_BAUD ( DUART16552_XTAL_FREQ / 16 )
+
+#endif /* _XTENSA_XT2000_SERIAL_H */
diff --git a/arch/xtensa/platforms/xt2000/setup.c b/arch/xtensa/platforms/xt2000/setup.c
new file mode 100644
index 000000000..145d129be
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/setup.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * arch/xtensa/platforms/xt2000/setup.c
+ *
+ * Platform specific functions for the XT2000 board.
+ *
+ * Authors:	Chris Zankel <chris@zankel.net>
+ *		Joe Taylor <joe@tensilica.com>
+ *
+ * Copyright 2001 - 2004 Tensilica Inc.
+ */
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/reboot.h>
+#include <linux/kdev_t.h>
+#include <linux/types.h>
+#include <linux/major.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/stringify.h>
+#include <linux/platform_device.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+
+#include <asm/processor.h>
+#include <asm/platform.h>
+#include <asm/bootparam.h>
+#include <platform/hardware.h>
+#include <platform/serial.h>
+
+/* Assumes s points to an 8-chr string.  No checking for NULL. */
+
+static void led_print (int f, char *s)
+{
+	unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
+	int i;
+	for (i = f; i < 8; i++)
+		if ((*led_addr++ = *s++) == 0)
+		    break;
+}
+
+void platform_halt(void)
+{
+	led_print (0, "  HALT  ");
+	local_irq_disable();
+	while (1);
+}
+
+void platform_power_off(void)
+{
+	led_print (0, "POWEROFF");
+	local_irq_disable();
+	while (1);
+}
+
+void platform_restart(void)
+{
+	/* Flush and reset the mmu, simulate a processor reset, and
+	 * jump to the reset vector. */
+	cpu_reset();
+	/* control never gets here */
+}
+
+void __init platform_setup(char** cmdline)
+{
+	led_print (0, "LINUX   ");
+}
+
+/* early initialization */
+
+void __init platform_init(bp_tag_t *first)
+{
+}
+
+/* Heartbeat. Let the LED blink. */
+
+void platform_heartbeat(void)
+{
+	static int i=0, t = 0;
+
+	if (--t < 0)
+	{
+		t = 59;
+		led_print(7, i ? ".": " ");
+		i ^= 1;
+	}
+}
+
+//#define RS_TABLE_SIZE 2
+
+#define _SERIAL_PORT(_base,_irq)					\
+{									\
+	.mapbase	= (_base),					\
+	.membase	= (void*)(_base),				\
+	.irq		= (_irq),					\
+	.uartclk	= DUART16552_XTAL_FREQ,				\
+	.iotype		= UPIO_MEM,					\
+	.flags		= UPF_BOOT_AUTOCONF,				\
+	.regshift	= 2,						\
+}
+
+static struct plat_serial8250_port xt2000_serial_data[] = {
+#if XCHAL_HAVE_BE
+	_SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
+	_SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
+#else
+	_SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
+	_SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
+#endif
+	{ }
+};
+
+static struct platform_device xt2000_serial8250_device = {
+	.name		= "serial8250",
+	.id		= PLAT8250_DEV_PLATFORM,
+	.dev		= {
+	    .platform_data = xt2000_serial_data,
+	},
+};
+
+static struct resource xt2000_sonic_res[] = {
+	{
+		.start = SONIC83934_ADDR,
+		.end   = SONIC83934_ADDR + 0xff,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.start = SONIC83934_INTNUM,
+		.end = SONIC83934_INTNUM,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device xt2000_sonic_device = {
+	.name		= "xtsonic",
+	.num_resources	= ARRAY_SIZE(xt2000_sonic_res),
+	.resource		= xt2000_sonic_res,
+};
+
+static int __init xt2000_setup_devinit(void)
+{
+	platform_device_register(&xt2000_serial8250_device);
+	platform_device_register(&xt2000_sonic_device);
+
+	return 0;
+}
+
+device_initcall(xt2000_setup_devinit);