[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>
diff --git a/arch/avr32/mach-at32ap/pio.c b/arch/avr32/mach-at32ap/pio.c
new file mode 100644
index 0000000..d3aabfc
--- /dev/null
+++ b/arch/avr32/mach-at32ap/pio.c
@@ -0,0 +1,118 @@
+/*
+ * Atmel PIO2 Port Multiplexer support
+ *
+ * Copyright (C) 2004-2006 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/debugfs.h>
+#include <linux/fs.h>
+#include <linux/platform_device.h>
+
+#include <asm/io.h>
+
+#include <asm/arch/portmux.h>
+
+#include "pio.h"
+
+#define MAX_NR_PIO_DEVICES 8
+
+struct pio_device {
+ void __iomem *regs;
+ const struct platform_device *pdev;
+ struct clk *clk;
+ u32 alloc_mask;
+ char name[32];
+};
+
+static struct pio_device pio_dev[MAX_NR_PIO_DEVICES];
+
+void portmux_set_func(unsigned int portmux_id, unsigned int pin_id,
+ unsigned int function_id)
+{
+ struct pio_device *pio;
+ u32 mask = 1 << pin_id;
+
+ BUG_ON(portmux_id >= MAX_NR_PIO_DEVICES);
+
+ pio = &pio_dev[portmux_id];
+
+ if (function_id)
+ pio_writel(pio, BSR, mask);
+ else
+ pio_writel(pio, ASR, mask);
+ pio_writel(pio, PDR, mask);
+}
+
+static int __init pio_probe(struct platform_device *pdev)
+{
+ struct pio_device *pio = NULL;
+
+ BUG_ON(pdev->id >= MAX_NR_PIO_DEVICES);
+ pio = &pio_dev[pdev->id];
+ BUG_ON(!pio->regs);
+
+ /* TODO: Interrupts */
+
+ platform_set_drvdata(pdev, pio);
+
+ printk(KERN_INFO "%s: Atmel Port Multiplexer at 0x%p (irq %d)\n",
+ pio->name, pio->regs, platform_get_irq(pdev, 0));
+
+ return 0;
+}
+
+static struct platform_driver pio_driver = {
+ .probe = pio_probe,
+ .driver = {
+ .name = "pio",
+ },
+};
+
+static int __init pio_init(void)
+{
+ return platform_driver_register(&pio_driver);
+}
+subsys_initcall(pio_init);
+
+void __init at32_init_pio(struct platform_device *pdev)
+{
+ struct resource *regs;
+ struct pio_device *pio;
+
+ if (pdev->id > MAX_NR_PIO_DEVICES) {
+ dev_err(&pdev->dev, "only %d PIO devices supported\n",
+ MAX_NR_PIO_DEVICES);
+ return;
+ }
+
+ pio = &pio_dev[pdev->id];
+ snprintf(pio->name, sizeof(pio->name), "pio%d", pdev->id);
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs) {
+ dev_err(&pdev->dev, "no mmio resource defined\n");
+ return;
+ }
+
+ pio->clk = clk_get(&pdev->dev, "mck");
+ if (IS_ERR(pio->clk))
+ /*
+ * This is a fatal error, but if we continue we might
+ * be so lucky that we manage to initialize the
+ * console and display this message...
+ */
+ dev_err(&pdev->dev, "no mck clock defined\n");
+ else
+ clk_enable(pio->clk);
+
+ pio->pdev = pdev;
+ pio->regs = ioremap(regs->start, regs->end - regs->start + 1);
+
+ pio_writel(pio, ODR, ~0UL);
+ pio_writel(pio, PER, ~0UL);
+}