[PATCH] avr32 architecture

This adds support for the Atmel AVR32 architecture as well as the AT32AP7000
CPU and the AT32STK1000 development board.

AVR32 is a new high-performance 32-bit RISC microprocessor core, designed for
cost-sensitive embedded applications, with particular emphasis on low power
consumption and high code density.  The AVR32 architecture is not binary
compatible with earlier 8-bit AVR architectures.

The AVR32 architecture, including the instruction set, is described by the
AVR32 Architecture Manual, available from

http://www.atmel.com/dyn/resources/prod_documents/doc32000.pdf

The Atmel AT32AP7000 is the first CPU implementing the AVR32 architecture.  It
features a 7-stage pipeline, 16KB instruction and data caches and a full
Memory Management Unit.  It also comes with a large set of integrated
peripherals, many of which are shared with the AT91 ARM-based controllers from
Atmel.

Full data sheet is available from

http://www.atmel.com/dyn/resources/prod_documents/doc32003.pdf

while the CPU core implementation including caches and MMU is documented by
the AVR32 AP Technical Reference, available from

http://www.atmel.com/dyn/resources/prod_documents/doc32001.pdf

Information about the AT32STK1000 development board can be found at

http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3918

including a BSP CD image with an earlier version of this patch, development
tools (binaries and source/patches) and a root filesystem image suitable for
booting from SD card.

Alternatively, there's a preliminary "getting started" guide available at
http://avr32linux.org/twiki/bin/view/Main/GettingStarted which provides links
to the sources and patches you will need in order to set up a cross-compiling
environment for avr32-linux.

This patch, as well as the other patches included with the BSP and the
toolchain patches, is actively supported by Atmel Corporation.

[dmccr@us.ibm.com: Fix more pxx_page macro locations]
[bunk@stusta.de: fix `make defconfig']
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Dave McCracken <dmccr@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 90 insertions, 0 deletions

diff --git a/arch/avr32/mach-at32ap/at32ap.c b/arch/avr32/mach-at32ap/at32ap.c
new file mode 100644
index 000000000000..f7cedf5aabea
--- /dev/null
+++ b/arch/avr32/mach-at32ap/at32ap.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <asm/io.h>
+
+#include <asm/arch/init.h>
+#include <asm/arch/sm.h>
+
+struct at32_sm system_manager;
+
+static int __init at32_sm_init(void)
+{
+        struct resource *regs;
+        struct at32_sm *sm = &system_manager;
+        int ret = -ENXIO;
+
+        regs = platform_get_resource(&at32_sm_device, IORESOURCE_MEM, 0);
+        if (!regs)
+                goto fail;
+
+        spin_lock_init(&sm->lock);
+        sm->pdev = &at32_sm_device;
+
+        ret = -ENOMEM;
+        sm->regs = ioremap(regs->start, regs->end - regs->start + 1);
+        if (!sm->regs)
+                goto fail;
+
+        return 0;
+
+fail:
+        printk(KERN_ERR "Failed to initialize System Manager: %d\n", ret);
+        return ret;
+}
+
+void __init setup_platform(void)
+{
+        at32_sm_init();
+        at32_clock_init();
+        at32_portmux_init();
+
+        /* FIXME: This doesn't belong here */
+        at32_setup_serial_console(1);
+}
+
+static int __init pdc_probe(struct platform_device *pdev)
+{
+        struct clk *pclk, *hclk;
+
+        pclk = clk_get(&pdev->dev, "pclk");
+        if (IS_ERR(pclk)) {
+                dev_err(&pdev->dev, "no pclk defined\n");
+                return PTR_ERR(pclk);
+        }
+        hclk = clk_get(&pdev->dev, "hclk");
+        if (IS_ERR(hclk)) {
+                dev_err(&pdev->dev, "no hclk defined\n");
+                clk_put(pclk);
+                return PTR_ERR(hclk);
+        }
+
+        clk_enable(pclk);
+        clk_enable(hclk);
+
+        dev_info(&pdev->dev, "Atmel Peripheral DMA Controller enabled\n");
+        return 0;
+}
+
+static struct platform_driver pdc_driver = {
+        .probe          = pdc_probe,
+        .driver         = {
+                .name   = "pdc",
+        },
+};
+
+static int __init pdc_init(void)
+{
+        return platform_driver_register(&pdc_driver);
+}
+arch_initcall(pdc_init);