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authorChris Zankel <chris@zankel.net>2008-11-06 10:17:46 -0800
committerChris Zankel <chris@zankel.net>2008-11-06 10:25:26 -0800
commit8fa5723aa7e053d498336b48448b292fc2e0458b (patch)
tree8f13e4f3515c6a3d4e2b8f2d5b18869814f220d5 /arch/xtensa/platforms
parent367b8112fe2ea5c39a7bb4d263dcdd9b612fae18 (diff)
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>
Diffstat (limited to 'arch/xtensa/platforms')
-rw-r--r--arch/xtensa/platforms/xt2000/Makefile5
-rw-r--r--arch/xtensa/platforms/xt2000/include/platform/hardware.h55
-rw-r--r--arch/xtensa/platforms/xt2000/include/platform/serial.h28
-rw-r--r--arch/xtensa/platforms/xt2000/setup.c181
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);

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