xtensa: Add xt2000 support files.

The last check-in to support the xt2000 development platform was missing
some files.

Signed-off-by: Chris Zankel <chris@zankel.net>

4 files changed, 269 insertions, 0 deletions

diff --git a/arch/xtensa/platforms/xt2000/Makefile b/arch/xtensa/platforms/xt2000/Makefile
new file mode 100644
index 000000000000..54d018e45bfc
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/Makefile
@@ -0,0 +1,5 @@
+#
+# 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 000000000000..41459ad07766
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/include/platform/hardware.h
@@ -0,0 +1,55 @@
+/*
+ * 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 <variant/core.h>
+#include <asm/io.h>
+
+/* 
+ * Memory configuration.
+ */
+
+#define PLATFORM_DEFAULT_MEM_START 0x00000000
+#define PLATFORM_DEFAULT_MEM_SIZE 0x08000000
+
+/*
+ * Number of platform IRQs
+ */
+#define PLATFORM_NR_IRQS 3
+/*
+ * 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 000000000000..7226cf732b47
--- /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 <variant/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 000000000000..9e83940ac265
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/setup.c
@@ -0,0 +1,181 @@
+/*
+ * 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.
+ *
+ * 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/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. */
+
+        __asm__ __volatile__ ("movi     a2, 15\n\t"
+                              "wsr      a2, " __stringify(ICOUNTLEVEL) "\n\t"
+                              "movi     a2, 0\n\t"
+                              "wsr      a2, " __stringify(ICOUNT) "\n\t"
+                              "wsr      a2, " __stringify(IBREAKENABLE) "\n\t"
+                              "wsr      a2, " __stringify(LCOUNT) "\n\t"
+                              "movi     a2, 0x1f\n\t"
+                              "wsr      a2, " __stringify(PS) "\n\t"
+                              "isync\n\t"
+                              "jx       %0\n\t"
+                              :
+                              : "a" (XCHAL_RESET_VECTOR_VADDR)
+                              : "a2"
+                              );
+
+        /* control never gets here */
+}
+
+void __init platform_setup(char** cmdline)
+{
+        led_print (0, "LINUX   ");
+}
+
+/* early initialization */
+
+extern sysmem_info_t __initdata sysmem;
+
+void platform_init(bp_tag_t* first)
+{
+        /* Set default memory block if not provided by the bootloader. */
+
+        if (sysmem.nr_banks == 0) {
+                sysmem.nr_banks = 1;
+                sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START;
+                sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START
+                                     + PLATFORM_DEFAULT_MEM_SIZE;
+        }
+}
+
+/* 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 STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)
+
+#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);