Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 231 insertions, 0 deletions

diff --git a/drivers/input/serio/ambakmi.c b/drivers/input/serio/ambakmi.c
new file mode 100644
index 00000000000..9b1ab5e7a98
--- /dev/null
+++ b/drivers/input/serio/ambakmi.c
@@ -0,0 +1,231 @@
+/*
+ *  linux/drivers/input/serio/ambakmi.c
+ *
+ *  Copyright (C) 2000-2003 Deep Blue Solutions Ltd.
+ *  Copyright (C) 2002 Russell King.
+ *
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/serio.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/hardware/amba.h>
+#include <asm/hardware/amba_kmi.h>
+#include <asm/hardware/clock.h>
+
+#define KMI_BASE	(kmi->base)
+
+struct amba_kmi_port {
+	struct serio		*io;
+	struct clk		*clk;
+	void __iomem		*base;
+	unsigned int		irq;
+	unsigned int		divisor;
+	unsigned int		open;
+};
+
+static irqreturn_t amba_kmi_int(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct amba_kmi_port *kmi = dev_id;
+	unsigned int status = readb(KMIIR);
+	int handled = IRQ_NONE;
+
+	while (status & KMIIR_RXINTR) {
+		serio_interrupt(kmi->io, readb(KMIDATA), 0, regs);
+		status = readb(KMIIR);
+		handled = IRQ_HANDLED;
+	}
+
+	return handled;
+}
+
+static int amba_kmi_write(struct serio *io, unsigned char val)
+{
+	struct amba_kmi_port *kmi = io->port_data;
+	unsigned int timeleft = 10000; /* timeout in 100ms */
+
+	while ((readb(KMISTAT) & KMISTAT_TXEMPTY) == 0 && timeleft--)
+		udelay(10);
+
+	if (timeleft)
+		writeb(val, KMIDATA);
+
+	return timeleft ? 0 : SERIO_TIMEOUT;
+}
+
+static int amba_kmi_open(struct serio *io)
+{
+	struct amba_kmi_port *kmi = io->port_data;
+	unsigned int divisor;
+	int ret;
+
+	ret = clk_use(kmi->clk);
+	if (ret)
+		goto out;
+
+	ret = clk_enable(kmi->clk);
+	if (ret)
+		goto clk_unuse;
+
+	divisor = clk_get_rate(kmi->clk) / 8000000 - 1;
+	writeb(divisor, KMICLKDIV);
+	writeb(KMICR_EN, KMICR);
+
+	ret = request_irq(kmi->irq, amba_kmi_int, 0, "kmi-pl050", kmi);
+	if (ret) {
+		printk(KERN_ERR "kmi: failed to claim IRQ%d\n", kmi->irq);
+		writeb(0, KMICR);
+		goto clk_disable;
+	}
+
+	writeb(KMICR_EN | KMICR_RXINTREN, KMICR);
+
+	return 0;
+
+ clk_disable:
+	clk_disable(kmi->clk);
+ clk_unuse:
+	clk_unuse(kmi->clk);
+ out:
+	return ret;
+}
+
+static void amba_kmi_close(struct serio *io)
+{
+	struct amba_kmi_port *kmi = io->port_data;
+
+	writeb(0, KMICR);
+
+	free_irq(kmi->irq, kmi);
+	clk_disable(kmi->clk);
+	clk_unuse(kmi->clk);
+}
+
+static int amba_kmi_probe(struct amba_device *dev, void *id)
+{
+	struct amba_kmi_port *kmi;
+	struct serio *io;
+	int ret;
+
+	ret = amba_request_regions(dev, NULL);
+	if (ret)
+		return ret;
+
+	kmi = kmalloc(sizeof(struct amba_kmi_port), GFP_KERNEL);
+	io = kmalloc(sizeof(struct serio), GFP_KERNEL);
+	if (!kmi || !io) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	memset(kmi, 0, sizeof(struct amba_kmi_port));
+	memset(io, 0, sizeof(struct serio));
+
+	io->id.type	= SERIO_8042;
+	io->write	= amba_kmi_write;
+	io->open	= amba_kmi_open;
+	io->close	= amba_kmi_close;
+	strlcpy(io->name, dev->dev.bus_id, sizeof(io->name));
+	strlcpy(io->phys, dev->dev.bus_id, sizeof(io->phys));
+	io->port_data	= kmi;
+	io->dev.parent	= &dev->dev;
+
+	kmi->io 	= io;
+	kmi->base	= ioremap(dev->res.start, KMI_SIZE);
+	if (!kmi->base) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	kmi->clk = clk_get(&dev->dev, "KMIREFCLK");
+	if (IS_ERR(kmi->clk)) {
+		ret = PTR_ERR(kmi->clk);
+		goto unmap;
+	}
+
+	kmi->irq = dev->irq[0];
+	amba_set_drvdata(dev, kmi);
+
+	serio_register_port(kmi->io);
+	return 0;
+
+ unmap:
+	iounmap(kmi->base);
+ out:
+	kfree(kmi);
+	kfree(io);
+	amba_release_regions(dev);
+	return ret;
+}
+
+static int amba_kmi_remove(struct amba_device *dev)
+{
+	struct amba_kmi_port *kmi = amba_get_drvdata(dev);
+
+	amba_set_drvdata(dev, NULL);
+
+	serio_unregister_port(kmi->io);
+	clk_put(kmi->clk);
+	iounmap(kmi->base);
+	kfree(kmi);
+	amba_release_regions(dev);
+	return 0;
+}
+
+static int amba_kmi_resume(struct amba_device *dev)
+{
+	struct amba_kmi_port *kmi = amba_get_drvdata(dev);
+
+	/* kick the serio layer to rescan this port */
+	serio_reconnect(kmi->io);
+
+	return 0;
+}
+
+static struct amba_id amba_kmi_idtable[] = {
+	{
+		.id	= 0x00041050,
+		.mask	= 0x000fffff,
+	},
+	{ 0, 0 }
+};
+
+static struct amba_driver ambakmi_driver = {
+	.drv		= {
+		.name	= "kmi-pl050",
+	},
+	.id_table	= amba_kmi_idtable,
+	.probe		= amba_kmi_probe,
+	.remove		= amba_kmi_remove,
+	.resume		= amba_kmi_resume,
+};
+
+static int __init amba_kmi_init(void)
+{
+	return amba_driver_register(&ambakmi_driver);
+}
+
+static void __exit amba_kmi_exit(void)
+{
+	amba_driver_unregister(&ambakmi_driver);
+}
+
+module_init(amba_kmi_init);
+module_exit(amba_kmi_exit);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("AMBA KMI controller driver");
+MODULE_LICENSE("GPL");