1 files changed, 118 insertions, 0 deletions
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);
+}