Creation of Cybook 2416 (actually Gen4) repository

drivers/mfd/Kconfig

@@ -0,0 +1,40 @@
+#
+# Multifunction miscellaneous devices
+#
+
+menu "Multifunction device drivers"
+
+config MFD_SM501
+	tristate "Support for Silicon Motion SM501"
+	 ---help---
+	  This is the core driver for the Silicon Motion SM501 multimedia
+	  companion chip. This device is a multifunction device which may
+	  provide numerous interfaces including USB host controller USB gadget,
+	  Asyncronous Serial ports, Audio functions and a dual display video
+	  interface. The device may be connected by PCI or local bus with
+	  varying functions enabled.
+
+endmenu
+
+menu "Multimedia Capabilities Port drivers"
+	depends on ARCH_SA1100
+
+config MCP
+	tristate
+
+# Interface drivers
+config MCP_SA11X0
+	tristate "Support SA11x0 MCP interface"
+	depends on ARCH_SA1100
+	select MCP
+
+# Chip drivers
+config MCP_UCB1200
+	tristate "Support for UCB1200 / UCB1300"
+	depends on MCP
+
+config MCP_UCB1200_TS
+	tristate "Touchscreen interface support"
+	depends on MCP_UCB1200 && INPUT
+
+endmenu

drivers/mfd/Makefile

@@ -0,0 +1,14 @@
+#
+# Makefile for multifunction miscellaneous devices
+#
+
+obj-$(CONFIG_MFD_SM501)		+= sm501.o
+
+obj-$(CONFIG_MCP)		+= mcp-core.o
+obj-$(CONFIG_MCP_SA11X0)	+= mcp-sa11x0.o
+obj-$(CONFIG_MCP_UCB1200)	+= ucb1x00-core.o
+obj-$(CONFIG_MCP_UCB1200_TS)	+= ucb1x00-ts.o
+
+ifeq ($(CONFIG_SA1100_ASSABET),y)
+obj-$(CONFIG_MCP_UCB1200)	+= ucb1x00-assabet.o
+endif

drivers/mfd/mcp-core.c

@@ -0,0 +1,257 @@
+/*
+ *  linux/drivers/mfd/mcp-core.c
+ *
+ *  Copyright (C) 2001 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.
+ *
+ *  Generic MCP (Multimedia Communications Port) layer.  All MCP locking
+ *  is solely held within this file.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include <asm/dma.h>
+#include <asm/system.h>
+
+#include "mcp.h"
+
+#define to_mcp(d)		container_of(d, struct mcp, attached_device)
+#define to_mcp_driver(d)	container_of(d, struct mcp_driver, drv)
+
+static int mcp_bus_match(struct device *dev, struct device_driver *drv)
+{
+	return 1;
+}
+
+static int mcp_bus_probe(struct device *dev)
+{
+	struct mcp *mcp = to_mcp(dev);
+	struct mcp_driver *drv = to_mcp_driver(dev->driver);
+
+	return drv->probe(mcp);
+}
+
+static int mcp_bus_remove(struct device *dev)
+{
+	struct mcp *mcp = to_mcp(dev);
+	struct mcp_driver *drv = to_mcp_driver(dev->driver);
+
+	drv->remove(mcp);
+	return 0;
+}
+
+static int mcp_bus_suspend(struct device *dev, pm_message_t state)
+{
+	struct mcp *mcp = to_mcp(dev);
+	int ret = 0;
+
+	if (dev->driver) {
+		struct mcp_driver *drv = to_mcp_driver(dev->driver);
+
+		ret = drv->suspend(mcp, state);
+	}
+	return ret;
+}
+
+static int mcp_bus_resume(struct device *dev)
+{
+	struct mcp *mcp = to_mcp(dev);
+	int ret = 0;
+
+	if (dev->driver) {
+		struct mcp_driver *drv = to_mcp_driver(dev->driver);
+
+		ret = drv->resume(mcp);
+	}
+	return ret;
+}
+
+static struct bus_type mcp_bus_type = {
+	.name		= "mcp",
+	.match		= mcp_bus_match,
+	.probe		= mcp_bus_probe,
+	.remove		= mcp_bus_remove,
+	.suspend	= mcp_bus_suspend,
+	.resume		= mcp_bus_resume,
+};
+
+/**
+ *	mcp_set_telecom_divisor - set the telecom divisor
+ *	@mcp: MCP interface structure
+ *	@div: SIB clock divisor
+ *
+ *	Set the telecom divisor on the MCP interface.  The resulting
+ *	sample rate is SIBCLOCK/div.
+ */
+void mcp_set_telecom_divisor(struct mcp *mcp, unsigned int div)
+{
+	spin_lock_irq(&mcp->lock);
+	mcp->ops->set_telecom_divisor(mcp, div);
+	spin_unlock_irq(&mcp->lock);
+}
+EXPORT_SYMBOL(mcp_set_telecom_divisor);
+
+/**
+ *	mcp_set_audio_divisor - set the audio divisor
+ *	@mcp: MCP interface structure
+ *	@div: SIB clock divisor
+ *
+ *	Set the audio divisor on the MCP interface.
+ */
+void mcp_set_audio_divisor(struct mcp *mcp, unsigned int div)
+{
+	spin_lock_irq(&mcp->lock);
+	mcp->ops->set_audio_divisor(mcp, div);
+	spin_unlock_irq(&mcp->lock);
+}
+EXPORT_SYMBOL(mcp_set_audio_divisor);
+
+/**
+ *	mcp_reg_write - write a device register
+ *	@mcp: MCP interface structure
+ *	@reg: 4-bit register index
+ *	@val: 16-bit data value
+ *
+ *	Write a device register.  The MCP interface must be enabled
+ *	to prevent this function hanging.
+ */
+void mcp_reg_write(struct mcp *mcp, unsigned int reg, unsigned int val)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mcp->lock, flags);
+	mcp->ops->reg_write(mcp, reg, val);
+	spin_unlock_irqrestore(&mcp->lock, flags);
+}
+EXPORT_SYMBOL(mcp_reg_write);
+
+/**
+ *	mcp_reg_read - read a device register
+ *	@mcp: MCP interface structure
+ *	@reg: 4-bit register index
+ *
+ *	Read a device register and return its value.  The MCP interface
+ *	must be enabled to prevent this function hanging.
+ */
+unsigned int mcp_reg_read(struct mcp *mcp, unsigned int reg)
+{
+	unsigned long flags;
+	unsigned int val;
+
+	spin_lock_irqsave(&mcp->lock, flags);
+	val = mcp->ops->reg_read(mcp, reg);
+	spin_unlock_irqrestore(&mcp->lock, flags);
+
+	return val;
+}
+EXPORT_SYMBOL(mcp_reg_read);
+
+/**
+ *	mcp_enable - enable the MCP interface
+ *	@mcp: MCP interface to enable
+ *
+ *	Enable the MCP interface.  Each call to mcp_enable will need
+ *	a corresponding call to mcp_disable to disable the interface.
+ */
+void mcp_enable(struct mcp *mcp)
+{
+	spin_lock_irq(&mcp->lock);
+	if (mcp->use_count++ == 0)
+		mcp->ops->enable(mcp);
+	spin_unlock_irq(&mcp->lock);
+}
+EXPORT_SYMBOL(mcp_enable);
+
+/**
+ *	mcp_disable - disable the MCP interface
+ *	@mcp: MCP interface to disable
+ *
+ *	Disable the MCP interface.  The MCP interface will only be
+ *	disabled once the number of calls to mcp_enable matches the
+ *	number of calls to mcp_disable.
+ */
+void mcp_disable(struct mcp *mcp)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mcp->lock, flags);
+	if (--mcp->use_count == 0)
+		mcp->ops->disable(mcp);
+	spin_unlock_irqrestore(&mcp->lock, flags);
+}
+EXPORT_SYMBOL(mcp_disable);
+
+static void mcp_release(struct device *dev)
+{
+	struct mcp *mcp = container_of(dev, struct mcp, attached_device);
+
+	kfree(mcp);
+}
+
+struct mcp *mcp_host_alloc(struct device *parent, size_t size)
+{
+	struct mcp *mcp;
+
+	mcp = kmalloc(sizeof(struct mcp) + size, GFP_KERNEL);
+	if (mcp) {
+		memset(mcp, 0, sizeof(struct mcp) + size);
+		spin_lock_init(&mcp->lock);
+		mcp->attached_device.parent = parent;
+		mcp->attached_device.bus = &mcp_bus_type;
+		mcp->attached_device.dma_mask = parent->dma_mask;
+		mcp->attached_device.release = mcp_release;
+	}
+	return mcp;
+}
+EXPORT_SYMBOL(mcp_host_alloc);
+
+int mcp_host_register(struct mcp *mcp)
+{
+	strcpy(mcp->attached_device.bus_id, "mcp0");
+	return device_register(&mcp->attached_device);
+}
+EXPORT_SYMBOL(mcp_host_register);
+
+void mcp_host_unregister(struct mcp *mcp)
+{
+	device_unregister(&mcp->attached_device);
+}
+EXPORT_SYMBOL(mcp_host_unregister);
+
+int mcp_driver_register(struct mcp_driver *mcpdrv)
+{
+	mcpdrv->drv.bus = &mcp_bus_type;
+	return driver_register(&mcpdrv->drv);
+}
+EXPORT_SYMBOL(mcp_driver_register);
+
+void mcp_driver_unregister(struct mcp_driver *mcpdrv)
+{
+	driver_unregister(&mcpdrv->drv);
+}
+EXPORT_SYMBOL(mcp_driver_unregister);
+
+static int __init mcp_init(void)
+{
+	return bus_register(&mcp_bus_type);
+}
+
+static void __exit mcp_exit(void)
+{
+	bus_unregister(&mcp_bus_type);
+}
+
+module_init(mcp_init);
+module_exit(mcp_exit);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("Core multimedia communications port driver");
+MODULE_LICENSE("GPL");

drivers/mfd/mcp-sa11x0.c

@@ -0,0 +1,273 @@
+/*
+ *  linux/drivers/mfd/mcp-sa11x0.c
+ *
+ *  Copyright (C) 2001-2005 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.
+ *
+ *  SA11x0 MCP (Multimedia Communications Port) driver.
+ *
+ *  MCP read/write timeouts from Jordi Colomer, rehacked by rmk.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+
+#include <asm/dma.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/system.h>
+#include <asm/arch/mcp.h>
+
+#include <asm/arch/assabet.h>
+
+#include "mcp.h"
+
+struct mcp_sa11x0 {
+	u32	mccr0;
+	u32	mccr1;
+};
+
+#define priv(mcp)	((struct mcp_sa11x0 *)mcp_priv(mcp))
+
+static void
+mcp_sa11x0_set_telecom_divisor(struct mcp *mcp, unsigned int divisor)
+{
+	unsigned int mccr0;
+
+	divisor /= 32;
+
+	mccr0 = Ser4MCCR0 & ~0x00007f00;
+	mccr0 |= divisor << 8;
+	Ser4MCCR0 = mccr0;
+}
+
+static void
+mcp_sa11x0_set_audio_divisor(struct mcp *mcp, unsigned int divisor)
+{
+	unsigned int mccr0;
+
+	divisor /= 32;
+
+	mccr0 = Ser4MCCR0 & ~0x0000007f;
+	mccr0 |= divisor;
+	Ser4MCCR0 = mccr0;
+}
+
+/*
+ * Write data to the device.  The bit should be set after 3 subframe
+ * times (each frame is 64 clocks).  We wait a maximum of 6 subframes.
+ * We really should try doing something more productive while we
+ * wait.
+ */
+static void
+mcp_sa11x0_write(struct mcp *mcp, unsigned int reg, unsigned int val)
+{
+	int ret = -ETIME;
+	int i;
+
+	Ser4MCDR2 = reg << 17 | MCDR2_Wr | (val & 0xffff);
+
+	for (i = 0; i < 2; i++) {
+		udelay(mcp->rw_timeout);
+		if (Ser4MCSR & MCSR_CWC) {
+			ret = 0;
+			break;
+		}
+	}
+
+	if (ret < 0)
+		printk(KERN_WARNING "mcp: write timed out\n");
+}
+
+/*
+ * Read data from the device.  The bit should be set after 3 subframe
+ * times (each frame is 64 clocks).  We wait a maximum of 6 subframes.
+ * We really should try doing something more productive while we
+ * wait.
+ */
+static unsigned int
+mcp_sa11x0_read(struct mcp *mcp, unsigned int reg)
+{
+	int ret = -ETIME;
+	int i;
+
+	Ser4MCDR2 = reg << 17 | MCDR2_Rd;
+
+	for (i = 0; i < 2; i++) {
+		udelay(mcp->rw_timeout);
+		if (Ser4MCSR & MCSR_CRC) {
+			ret = Ser4MCDR2 & 0xffff;
+			break;
+		}
+	}
+
+	if (ret < 0)
+		printk(KERN_WARNING "mcp: read timed out\n");
+
+	return ret;
+}
+
+static void mcp_sa11x0_enable(struct mcp *mcp)
+{
+	Ser4MCSR = -1;
+	Ser4MCCR0 |= MCCR0_MCE;
+}
+
+static void mcp_sa11x0_disable(struct mcp *mcp)
+{
+	Ser4MCCR0 &= ~MCCR0_MCE;
+}
+
+/*
+ * Our methods.
+ */
+static struct mcp_ops mcp_sa11x0 = {
+	.set_telecom_divisor	= mcp_sa11x0_set_telecom_divisor,
+	.set_audio_divisor	= mcp_sa11x0_set_audio_divisor,
+	.reg_write		= mcp_sa11x0_write,
+	.reg_read		= mcp_sa11x0_read,
+	.enable			= mcp_sa11x0_enable,
+	.disable		= mcp_sa11x0_disable,
+};
+
+static int mcp_sa11x0_probe(struct platform_device *pdev)
+{
+	struct mcp_plat_data *data = pdev->dev.platform_data;
+	struct mcp *mcp;
+	int ret;
+
+	if (!data)
+		return -ENODEV;
+
+	if (!request_mem_region(0x80060000, 0x60, "sa11x0-mcp"))
+		return -EBUSY;
+
+	mcp = mcp_host_alloc(&pdev->dev, sizeof(struct mcp_sa11x0));
+	if (!mcp) {
+		ret = -ENOMEM;
+		goto release;
+	}
+
+	mcp->owner		= THIS_MODULE;
+	mcp->ops		= &mcp_sa11x0;
+	mcp->sclk_rate		= data->sclk_rate;
+	mcp->dma_audio_rd	= DMA_Ser4MCP0Rd;
+	mcp->dma_audio_wr	= DMA_Ser4MCP0Wr;
+	mcp->dma_telco_rd	= DMA_Ser4MCP1Rd;
+	mcp->dma_telco_wr	= DMA_Ser4MCP1Wr;
+
+	platform_set_drvdata(pdev, mcp);
+
+	if (machine_is_assabet()) {
+		ASSABET_BCR_set(ASSABET_BCR_CODEC_RST);
+	}
+
+	/*
+	 * Setup the PPC unit correctly.
+	 */
+	PPDR &= ~PPC_RXD4;
+	PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
+	PSDR |= PPC_RXD4;
+	PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
+	PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
+
+	/*
+	 * Initialise device.  Note that we initially
+	 * set the sampling rate to minimum.
+	 */
+	Ser4MCSR = -1;
+	Ser4MCCR1 = data->mccr1;
+	Ser4MCCR0 = data->mccr0 | 0x7f7f;
+
+	/*
+	 * Calculate the read/write timeout (us) from the bit clock
+	 * rate.  This is the period for 3 64-bit frames.  Always
+	 * round this time up.
+	 */
+	mcp->rw_timeout = (64 * 3 * 1000000 + mcp->sclk_rate - 1) /
+			  mcp->sclk_rate;
+
+	ret = mcp_host_register(mcp);
+	if (ret == 0)
+		goto out;
+
+ release:
+	release_mem_region(0x80060000, 0x60);
+	platform_set_drvdata(pdev, NULL);
+
+ out:
+	return ret;
+}
+
+static int mcp_sa11x0_remove(struct platform_device *dev)
+{
+	struct mcp *mcp = platform_get_drvdata(dev);
+
+	platform_set_drvdata(dev, NULL);
+	mcp_host_unregister(mcp);
+	release_mem_region(0x80060000, 0x60);
+
+	return 0;
+}
+
+static int mcp_sa11x0_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct mcp *mcp = platform_get_drvdata(dev);
+
+	priv(mcp)->mccr0 = Ser4MCCR0;
+	priv(mcp)->mccr1 = Ser4MCCR1;
+	Ser4MCCR0 &= ~MCCR0_MCE;
+
+	return 0;
+}
+
+static int mcp_sa11x0_resume(struct platform_device *dev)
+{
+	struct mcp *mcp = platform_get_drvdata(dev);
+
+	Ser4MCCR1 = priv(mcp)->mccr1;
+	Ser4MCCR0 = priv(mcp)->mccr0;
+
+	return 0;
+}
+
+/*
+ * The driver for the SA11x0 MCP port.
+ */
+static struct platform_driver mcp_sa11x0_driver = {
+	.probe		= mcp_sa11x0_probe,
+	.remove		= mcp_sa11x0_remove,
+	.suspend	= mcp_sa11x0_suspend,
+	.resume		= mcp_sa11x0_resume,
+	.driver		= {
+		.name	= "sa11x0-mcp",
+	},
+};
+
+/*
+ * This needs re-working
+ */
+static int __init mcp_sa11x0_init(void)
+{
+	return platform_driver_register(&mcp_sa11x0_driver);
+}
+
+static void __exit mcp_sa11x0_exit(void)
+{
+	platform_driver_unregister(&mcp_sa11x0_driver);
+}
+
+module_init(mcp_sa11x0_init);
+module_exit(mcp_sa11x0_exit);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("SA11x0 multimedia communications port driver");
+MODULE_LICENSE("GPL");

drivers/mfd/mcp.h

@@ -0,0 +1,66 @@
+/*
+ *  linux/drivers/mfd/mcp.h
+ *
+ *  Copyright (C) 2001 Russell King, All Rights Reserved.
+ *
+ * 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.
+ */
+#ifndef MCP_H
+#define MCP_H
+
+struct mcp_ops;
+
+struct mcp {
+	struct module	*owner;
+	struct mcp_ops	*ops;
+	spinlock_t	lock;
+	int		use_count;
+	unsigned int	sclk_rate;
+	unsigned int	rw_timeout;
+	dma_device_t	dma_audio_rd;
+	dma_device_t	dma_audio_wr;
+	dma_device_t	dma_telco_rd;
+	dma_device_t	dma_telco_wr;
+	struct device	attached_device;
+};
+
+struct mcp_ops {
+	void		(*set_telecom_divisor)(struct mcp *, unsigned int);
+	void		(*set_audio_divisor)(struct mcp *, unsigned int);
+	void		(*reg_write)(struct mcp *, unsigned int, unsigned int);
+	unsigned int	(*reg_read)(struct mcp *, unsigned int);
+	void		(*enable)(struct mcp *);
+	void		(*disable)(struct mcp *);
+};
+
+void mcp_set_telecom_divisor(struct mcp *, unsigned int);
+void mcp_set_audio_divisor(struct mcp *, unsigned int);
+void mcp_reg_write(struct mcp *, unsigned int, unsigned int);
+unsigned int mcp_reg_read(struct mcp *, unsigned int);
+void mcp_enable(struct mcp *);
+void mcp_disable(struct mcp *);
+#define mcp_get_sclk_rate(mcp)	((mcp)->sclk_rate)
+
+struct mcp *mcp_host_alloc(struct device *, size_t);
+int mcp_host_register(struct mcp *);
+void mcp_host_unregister(struct mcp *);
+
+struct mcp_driver {
+	struct device_driver drv;
+	int (*probe)(struct mcp *);
+	void (*remove)(struct mcp *);
+	int (*suspend)(struct mcp *, pm_message_t);
+	int (*resume)(struct mcp *);
+};
+
+int mcp_driver_register(struct mcp_driver *);
+void mcp_driver_unregister(struct mcp_driver *);
+
+#define mcp_get_drvdata(mcp)	dev_get_drvdata(&(mcp)->attached_device)
+#define mcp_set_drvdata(mcp,d)	dev_set_drvdata(&(mcp)->attached_device, d)
+
+#define mcp_priv(mcp)		((void *)((mcp)+1))
+
+#endif

drivers/mfd/ucb1x00-assabet.c

@@ -0,0 +1,73 @@
+/*
+ *  linux/drivers/mfd/ucb1x00-assabet.c
+ *
+ *  Copyright (C) 2001-2003 Russell King, All Rights Reserved.
+ *
+ * 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.
+ *
+ *  We handle the machine-specific bits of the UCB1x00 driver here.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/device.h>
+
+#include <asm/dma.h>
+
+#include "ucb1x00.h"
+
+#define UCB1X00_ATTR(name,input)\
+static ssize_t name##_show(struct class_device *dev, char *buf)	\
+{								\
+	struct ucb1x00 *ucb = classdev_to_ucb1x00(dev);		\
+	int val;						\
+	ucb1x00_adc_enable(ucb);				\
+	val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC);		\
+	ucb1x00_adc_disable(ucb);				\
+	return sprintf(buf, "%d\n", val);			\
+}								\
+static CLASS_DEVICE_ATTR(name,0444,name##_show,NULL)
+
+UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1);
+UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0);
+UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2);
+
+static int ucb1x00_assabet_add(struct ucb1x00_dev *dev)
+{
+	class_device_create_file(&dev->ucb->cdev, &class_device_attr_vbatt);
+	class_device_create_file(&dev->ucb->cdev, &class_device_attr_vcharger);
+	class_device_create_file(&dev->ucb->cdev, &class_device_attr_batt_temp);
+	return 0;
+}
+
+static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev)
+{
+	class_device_remove_file(&dev->ucb->cdev, &class_device_attr_batt_temp);
+	class_device_remove_file(&dev->ucb->cdev, &class_device_attr_vcharger);
+	class_device_remove_file(&dev->ucb->cdev, &class_device_attr_vbatt);
+}
+
+static struct ucb1x00_driver ucb1x00_assabet_driver = {
+	.add	= ucb1x00_assabet_add,
+	.remove	= ucb1x00_assabet_remove,
+};
+
+static int __init ucb1x00_assabet_init(void)
+{
+	return ucb1x00_register_driver(&ucb1x00_assabet_driver);
+}
+
+static void __exit ucb1x00_assabet_exit(void)
+{
+	ucb1x00_unregister_driver(&ucb1x00_assabet_driver);
+}
+
+module_init(ucb1x00_assabet_init);
+module_exit(ucb1x00_assabet_exit);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver");
+MODULE_LICENSE("GPL");

drivers/mfd/ucb1x00-core.c

@@ -0,0 +1,664 @@
+/*
+ *  linux/drivers/mfd/ucb1x00-core.c
+ *
+ *  Copyright (C) 2001 Russell King, All Rights Reserved.
+ *
+ * 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.
+ *
+ *  The UCB1x00 core driver provides basic services for handling IO,
+ *  the ADC, interrupts, and accessing registers.  It is designed
+ *  such that everything goes through this layer, thereby providing
+ *  a consistent locking methodology, as well as allowing the drivers
+ *  to be used on other non-MCP-enabled hardware platforms.
+ *
+ *  Note that all locks are private to this file.  Nothing else may
+ *  touch them.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+
+#include <asm/dma.h>
+#include <asm/hardware.h>
+
+#include "ucb1x00.h"
+
+static DEFINE_MUTEX(ucb1x00_mutex);
+static LIST_HEAD(ucb1x00_drivers);
+static LIST_HEAD(ucb1x00_devices);
+
+/**
+ *	ucb1x00_io_set_dir - set IO direction
+ *	@ucb: UCB1x00 structure describing chip
+ *	@in:  bitfield of IO pins to be set as inputs
+ *	@out: bitfield of IO pins to be set as outputs
+ *
+ *	Set the IO direction of the ten general purpose IO pins on
+ *	the UCB1x00 chip.  The @in bitfield has priority over the
+ *	@out bitfield, in that if you specify a pin as both input
+ *	and output, it will end up as an input.
+ *
+ *	ucb1x00_enable must have been called to enable the comms
+ *	before using this function.
+ *
+ *	This function takes a spinlock, disabling interrupts.
+ */
+void ucb1x00_io_set_dir(struct ucb1x00 *ucb, unsigned int in, unsigned int out)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ucb->io_lock, flags);
+	ucb->io_dir |= out;
+	ucb->io_dir &= ~in;
+
+	ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir);
+	spin_unlock_irqrestore(&ucb->io_lock, flags);
+}
+
+/**
+ *	ucb1x00_io_write - set or clear IO outputs
+ *	@ucb:   UCB1x00 structure describing chip
+ *	@set:   bitfield of IO pins to set to logic '1'
+ *	@clear: bitfield of IO pins to set to logic '0'
+ *
+ *	Set the IO output state of the specified IO pins.  The value
+ *	is retained if the pins are subsequently configured as inputs.
+ *	The @clear bitfield has priority over the @set bitfield -
+ *	outputs will be cleared.
+ *
+ *	ucb1x00_enable must have been called to enable the comms
+ *	before using this function.
+ *
+ *	This function takes a spinlock, disabling interrupts.
+ */
+void ucb1x00_io_write(struct ucb1x00 *ucb, unsigned int set, unsigned int clear)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ucb->io_lock, flags);
+	ucb->io_out |= set;
+	ucb->io_out &= ~clear;
+
+	ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out);
+	spin_unlock_irqrestore(&ucb->io_lock, flags);
+}
+
+/**
+ *	ucb1x00_io_read - read the current state of the IO pins
+ *	@ucb: UCB1x00 structure describing chip
+ *
+ *	Return a bitfield describing the logic state of the ten
+ *	general purpose IO pins.
+ *
+ *	ucb1x00_enable must have been called to enable the comms
+ *	before using this function.
+ *
+ *	This function does not take any semaphores or spinlocks.
+ */
+unsigned int ucb1x00_io_read(struct ucb1x00 *ucb)
+{
+	return ucb1x00_reg_read(ucb, UCB_IO_DATA);
+}
+
+/*
+ * UCB1300 data sheet says we must:
+ *  1. enable ADC	=> 5us (including reference startup time)
+ *  2. select input	=> 51*tsibclk  => 4.3us
+ *  3. start conversion	=> 102*tsibclk => 8.5us
+ * (tsibclk = 1/11981000)
+ * Period between SIB 128-bit frames = 10.7us
+ */
+
+/**
+ *	ucb1x00_adc_enable - enable the ADC converter
+ *	@ucb: UCB1x00 structure describing chip
+ *
+ *	Enable the ucb1x00 and ADC converter on the UCB1x00 for use.
+ *	Any code wishing to use the ADC converter must call this
+ *	function prior to using it.
+ *
+ *	This function takes the ADC semaphore to prevent two or more
+ *	concurrent uses, and therefore may sleep.  As a result, it
+ *	can only be called from process context, not interrupt
+ *	context.
+ *
+ *	You should release the ADC as soon as possible using
+ *	ucb1x00_adc_disable.
+ */
+void ucb1x00_adc_enable(struct ucb1x00 *ucb)
+{
+	down(&ucb->adc_sem);
+
+	ucb->adc_cr |= UCB_ADC_ENA;
+
+	ucb1x00_enable(ucb);
+	ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr);
+}
+
+/**
+ *	ucb1x00_adc_read - read the specified ADC channel
+ *	@ucb: UCB1x00 structure describing chip
+ *	@adc_channel: ADC channel mask
+ *	@sync: wait for syncronisation pulse.
+ *
+ *	Start an ADC conversion and wait for the result.  Note that
+ *	synchronised ADC conversions (via the ADCSYNC pin) must wait
+ *	until the trigger is asserted and the conversion is finished.
+ *
+ *	This function currently spins waiting for the conversion to
+ *	complete (2 frames max without sync).
+ *
+ *	If called for a synchronised ADC conversion, it may sleep
+ *	with the ADC semaphore held.
+ */
+unsigned int ucb1x00_adc_read(struct ucb1x00 *ucb, int adc_channel, int sync)
+{
+	unsigned int val;
+
+	if (sync)
+		adc_channel |= UCB_ADC_SYNC_ENA;
+
+	ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr | adc_channel);
+	ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr | adc_channel | UCB_ADC_START);
+
+	for (;;) {
+		val = ucb1x00_reg_read(ucb, UCB_ADC_DATA);
+		if (val & UCB_ADC_DAT_VAL)
+			break;
+		/* yield to other processes */
+		set_current_state(TASK_INTERRUPTIBLE);
+		schedule_timeout(1);
+	}
+
+	return UCB_ADC_DAT(val);
+}
+
+/**
+ *	ucb1x00_adc_disable - disable the ADC converter
+ *	@ucb: UCB1x00 structure describing chip
+ *
+ *	Disable the ADC converter and release the ADC semaphore.
+ */
+void ucb1x00_adc_disable(struct ucb1x00 *ucb)
+{
+	ucb->adc_cr &= ~UCB_ADC_ENA;
+	ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr);
+	ucb1x00_disable(ucb);
+
+	up(&ucb->adc_sem);
+}
+
+/*
+ * UCB1x00 Interrupt handling.
+ *
+ * The UCB1x00 can generate interrupts when the SIBCLK is stopped.
+ * Since we need to read an internal register, we must re-enable
+ * SIBCLK to talk to the chip.  We leave the clock running until
+ * we have finished processing all interrupts from the chip.
+ */
+static irqreturn_t ucb1x00_irq(int irqnr, void *devid)
+{
+	struct ucb1x00 *ucb = devid;
+	struct ucb1x00_irq *irq;
+	unsigned int isr, i;
+
+	ucb1x00_enable(ucb);
+	isr = ucb1x00_reg_read(ucb, UCB_IE_STATUS);
+	ucb1x00_reg_write(ucb, UCB_IE_CLEAR, isr);
+	ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0);
+
+	for (i = 0, irq = ucb->irq_handler; i < 16 && isr; i++, isr >>= 1, irq++)
+		if (isr & 1 && irq->fn)
+			irq->fn(i, irq->devid);
+	ucb1x00_disable(ucb);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ *	ucb1x00_hook_irq - hook a UCB1x00 interrupt
+ *	@ucb:   UCB1x00 structure describing chip
+ *	@idx:   interrupt index
+ *	@fn:    function to call when interrupt is triggered
+ *	@devid: device id to pass to interrupt handler
+ *
+ *	Hook the specified interrupt.  You can only register one handler
+ *	for each interrupt source.  The interrupt source is not enabled
+ *	by this function; use ucb1x00_enable_irq instead.
+ *
+ *	Interrupt handlers will be called with other interrupts enabled.
+ *
+ *	Returns zero on success, or one of the following errors:
+ *	 -EINVAL if the interrupt index is invalid
+ *	 -EBUSY if the interrupt has already been hooked
+ */
+int ucb1x00_hook_irq(struct ucb1x00 *ucb, unsigned int idx, void (*fn)(int, void *), void *devid)
+{
+	struct ucb1x00_irq *irq;
+	int ret = -EINVAL;
+
+	if (idx < 16) {
+		irq = ucb->irq_handler + idx;
+		ret = -EBUSY;
+
+		spin_lock_irq(&ucb->lock);
+		if (irq->fn == NULL) {
+			irq->devid = devid;
+			irq->fn = fn;
+			ret = 0;
+		}
+		spin_unlock_irq(&ucb->lock);
+	}
+	return ret;
+}
+
+/**
+ *	ucb1x00_enable_irq - enable an UCB1x00 interrupt source
+ *	@ucb: UCB1x00 structure describing chip
+ *	@idx: interrupt index
+ *	@edges: interrupt edges to enable
+ *
+ *	Enable the specified interrupt to trigger on %UCB_RISING,
+ *	%UCB_FALLING or both edges.  The interrupt should have been
+ *	hooked by ucb1x00_hook_irq.
+ */
+void ucb1x00_enable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges)
+{
+	unsigned long flags;
+
+	if (idx < 16) {
+		spin_lock_irqsave(&ucb->lock, flags);
+
+		ucb1x00_enable(ucb);
+		if (edges & UCB_RISING) {
+			ucb->irq_ris_enbl |= 1 << idx;
+			ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl);
+		}
+		if (edges & UCB_FALLING) {
+			ucb->irq_fal_enbl |= 1 << idx;
+			ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl);
+		}
+		ucb1x00_disable(ucb);
+		spin_unlock_irqrestore(&ucb->lock, flags);
+	}
+}
+
+/**
+ *	ucb1x00_disable_irq - disable an UCB1x00 interrupt source
+ *	@ucb: UCB1x00 structure describing chip
+ *	@edges: interrupt edges to disable
+ *
+ *	Disable the specified interrupt triggering on the specified
+ *	(%UCB_RISING, %UCB_FALLING or both) edges.
+ */
+void ucb1x00_disable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges)
+{
+	unsigned long flags;
+
+	if (idx < 16) {
+		spin_lock_irqsave(&ucb->lock, flags);
+
+		ucb1x00_enable(ucb);
+		if (edges & UCB_RISING) {
+			ucb->irq_ris_enbl &= ~(1 << idx);
+			ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl);
+		}
+		if (edges & UCB_FALLING) {
+			ucb->irq_fal_enbl &= ~(1 << idx);
+			ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl);
+		}
+		ucb1x00_disable(ucb);
+		spin_unlock_irqrestore(&ucb->lock, flags);
+	}
+}
+
+/**
+ *	ucb1x00_free_irq - disable and free the specified UCB1x00 interrupt
+ *	@ucb: UCB1x00 structure describing chip
+ *	@idx: interrupt index
+ *	@devid: device id.
+ *
+ *	Disable the interrupt source and remove the handler.  devid must
+ *	match the devid passed when hooking the interrupt.
+ *
+ *	Returns zero on success, or one of the following errors:
+ *	 -EINVAL if the interrupt index is invalid
+ *	 -ENOENT if devid does not match
+ */
+int ucb1x00_free_irq(struct ucb1x00 *ucb, unsigned int idx, void *devid)
+{
+	struct ucb1x00_irq *irq;
+	int ret;
+
+	if (idx >= 16)
+		goto bad;
+
+	irq = ucb->irq_handler + idx;
+	ret = -ENOENT;
+
+	spin_lock_irq(&ucb->lock);
+	if (irq->devid == devid) {
+		ucb->irq_ris_enbl &= ~(1 << idx);
+		ucb->irq_fal_enbl &= ~(1 << idx);
+
+		ucb1x00_enable(ucb);
+		ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl);
+		ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl);
+		ucb1x00_disable(ucb);
+
+		irq->fn = NULL;
+		irq->devid = NULL;
+		ret = 0;
+	}
+	spin_unlock_irq(&ucb->lock);
+	return ret;
+
+bad:
+	printk(KERN_ERR "Freeing bad UCB1x00 irq %d\n", idx);
+	return -EINVAL;
+}
+
+static int ucb1x00_add_dev(struct ucb1x00 *ucb, struct ucb1x00_driver *drv)
+{
+	struct ucb1x00_dev *dev;
+	int ret = -ENOMEM;
+
+	dev = kmalloc(sizeof(struct ucb1x00_dev), GFP_KERNEL);
+	if (dev) {
+		dev->ucb = ucb;
+		dev->drv = drv;
+
+		ret = drv->add(dev);
+
+		if (ret == 0) {
+			list_add(&dev->dev_node, &ucb->devs);
+			list_add(&dev->drv_node, &drv->devs);
+		} else {
+			kfree(dev);
+		}
+	}
+	return ret;
+}
+
+static void ucb1x00_remove_dev(struct ucb1x00_dev *dev)
+{
+	dev->drv->remove(dev);
+	list_del(&dev->dev_node);
+	list_del(&dev->drv_node);
+	kfree(dev);
+}
+
+/*
+ * Try to probe our interrupt, rather than relying on lots of
+ * hard-coded machine dependencies.  For reference, the expected
+ * IRQ mappings are:
+ *
+ *  	Machine		Default IRQ
+ *	adsbitsy	IRQ_GPCIN4
+ *	cerf		IRQ_GPIO_UCB1200_IRQ
+ *	flexanet	IRQ_GPIO_GUI
+ *	freebird	IRQ_GPIO_FREEBIRD_UCB1300_IRQ
+ *	graphicsclient	ADS_EXT_IRQ(8)
+ *	graphicsmaster	ADS_EXT_IRQ(8)
+ *	lart		LART_IRQ_UCB1200
+ *	omnimeter	IRQ_GPIO23
+ *	pfs168		IRQ_GPIO_UCB1300_IRQ
+ *	simpad		IRQ_GPIO_UCB1300_IRQ
+ *	shannon		SHANNON_IRQ_GPIO_IRQ_CODEC
+ *	yopy		IRQ_GPIO_UCB1200_IRQ
+ */
+static int ucb1x00_detect_irq(struct ucb1x00 *ucb)
+{
+	unsigned long mask;
+
+	mask = probe_irq_on();
+	if (!mask) {
+		probe_irq_off(mask);
+		return NO_IRQ;
+	}
+
+	/*
+	 * Enable the ADC interrupt.
+	 */
+	ucb1x00_reg_write(ucb, UCB_IE_RIS, UCB_IE_ADC);
+	ucb1x00_reg_write(ucb, UCB_IE_FAL, UCB_IE_ADC);
+	ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0xffff);
+	ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0);
+
+	/*
+	 * Cause an ADC interrupt.
+	 */
+	ucb1x00_reg_write(ucb, UCB_ADC_CR, UCB_ADC_ENA);
+	ucb1x00_reg_write(ucb, UCB_ADC_CR, UCB_ADC_ENA | UCB_ADC_START);
+
+	/*
+	 * Wait for the conversion to complete.
+	 */
+	while ((ucb1x00_reg_read(ucb, UCB_ADC_DATA) & UCB_ADC_DAT_VAL) == 0);
+	ucb1x00_reg_write(ucb, UCB_ADC_CR, 0);
+
+	/*
+	 * Disable and clear interrupt.
+	 */
+	ucb1x00_reg_write(ucb, UCB_IE_RIS, 0);
+	ucb1x00_reg_write(ucb, UCB_IE_FAL, 0);
+	ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0xffff);
+	ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0);
+
+	/*
+	 * Read triggered interrupt.
+	 */
+	return probe_irq_off(mask);
+}
+
+static void ucb1x00_release(struct class_device *dev)
+{
+	struct ucb1x00 *ucb = classdev_to_ucb1x00(dev);
+	kfree(ucb);
+}
+
+static struct class ucb1x00_class = {
+	.name		= "ucb1x00",
+	.release	= ucb1x00_release,
+};
+
+static int ucb1x00_probe(struct mcp *mcp)
+{
+	struct ucb1x00 *ucb;
+	struct ucb1x00_driver *drv;
+	unsigned int id;
+	int ret = -ENODEV;
+
+	mcp_enable(mcp);
+	id = mcp_reg_read(mcp, UCB_ID);
+
+	if (id != UCB_ID_1200 && id != UCB_ID_1300 && id != UCB_ID_TC35143) {
+		printk(KERN_WARNING "UCB1x00 ID not found: %04x\n", id);
+		goto err_disable;
+	}
+
+	ucb = kmalloc(sizeof(struct ucb1x00), GFP_KERNEL);
+	ret = -ENOMEM;
+	if (!ucb)
+		goto err_disable;
+
+	memset(ucb, 0, sizeof(struct ucb1x00));
+
+	ucb->cdev.class = &ucb1x00_class;
+	ucb->cdev.dev = &mcp->attached_device;
+	strlcpy(ucb->cdev.class_id, "ucb1x00", sizeof(ucb->cdev.class_id));
+
+	spin_lock_init(&ucb->lock);
+	spin_lock_init(&ucb->io_lock);
+	sema_init(&ucb->adc_sem, 1);
+
+	ucb->id  = id;
+	ucb->mcp = mcp;
+	ucb->irq = ucb1x00_detect_irq(ucb);
+	if (ucb->irq == NO_IRQ) {
+		printk(KERN_ERR "UCB1x00: IRQ probe failed\n");
+		ret = -ENODEV;
+		goto err_free;
+	}
+
+	ret = request_irq(ucb->irq, ucb1x00_irq, IRQF_TRIGGER_RISING,
+			  "UCB1x00", ucb);
+	if (ret) {
+		printk(KERN_ERR "ucb1x00: unable to grab irq%d: %d\n",
+			ucb->irq, ret);
+		goto err_free;
+	}
+
+	mcp_set_drvdata(mcp, ucb);
+
+	ret = class_device_register(&ucb->cdev);
+	if (ret)
+		goto err_irq;
+
+	INIT_LIST_HEAD(&ucb->devs);
+	mutex_lock(&ucb1x00_mutex);
+	list_add(&ucb->node, &ucb1x00_devices);
+	list_for_each_entry(drv, &ucb1x00_drivers, node) {
+		ucb1x00_add_dev(ucb, drv);
+	}
+	mutex_unlock(&ucb1x00_mutex);
+	goto out;
+
+ err_irq:
+	free_irq(ucb->irq, ucb);
+ err_free:
+	kfree(ucb);
+ err_disable:
+	mcp_disable(mcp);
+ out:
+	return ret;
+}
+
+static void ucb1x00_remove(struct mcp *mcp)
+{
+	struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
+	struct list_head *l, *n;
+
+	mutex_lock(&ucb1x00_mutex);
+	list_del(&ucb->node);
+	list_for_each_safe(l, n, &ucb->devs) {
+		struct ucb1x00_dev *dev = list_entry(l, struct ucb1x00_dev, dev_node);
+		ucb1x00_remove_dev(dev);
+	}
+	mutex_unlock(&ucb1x00_mutex);
+
+	free_irq(ucb->irq, ucb);
+	class_device_unregister(&ucb->cdev);
+}
+
+int ucb1x00_register_driver(struct ucb1x00_driver *drv)
+{
+	struct ucb1x00 *ucb;
+
+	INIT_LIST_HEAD(&drv->devs);
+	mutex_lock(&ucb1x00_mutex);
+	list_add(&drv->node, &ucb1x00_drivers);
+	list_for_each_entry(ucb, &ucb1x00_devices, node) {
+		ucb1x00_add_dev(ucb, drv);
+	}
+	mutex_unlock(&ucb1x00_mutex);
+	return 0;
+}
+
+void ucb1x00_unregister_driver(struct ucb1x00_driver *drv)
+{
+	struct list_head *n, *l;
+
+	mutex_lock(&ucb1x00_mutex);
+	list_del(&drv->node);
+	list_for_each_safe(l, n, &drv->devs) {
+		struct ucb1x00_dev *dev = list_entry(l, struct ucb1x00_dev, drv_node);
+		ucb1x00_remove_dev(dev);
+	}
+	mutex_unlock(&ucb1x00_mutex);
+}
+
+static int ucb1x00_suspend(struct mcp *mcp, pm_message_t state)
+{
+	struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
+	struct ucb1x00_dev *dev;
+
+	mutex_lock(&ucb1x00_mutex);
+	list_for_each_entry(dev, &ucb->devs, dev_node) {
+		if (dev->drv->suspend)
+			dev->drv->suspend(dev, state);
+	}
+	mutex_unlock(&ucb1x00_mutex);
+	return 0;
+}
+
+static int ucb1x00_resume(struct mcp *mcp)
+{
+	struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
+	struct ucb1x00_dev *dev;
+
+	mutex_lock(&ucb1x00_mutex);
+	list_for_each_entry(dev, &ucb->devs, dev_node) {
+		if (dev->drv->resume)
+			dev->drv->resume(dev);
+	}
+	mutex_unlock(&ucb1x00_mutex);
+	return 0;
+}
+
+static struct mcp_driver ucb1x00_driver = {
+	.drv		= {
+		.name	= "ucb1x00",
+	},
+	.probe		= ucb1x00_probe,
+	.remove		= ucb1x00_remove,
+	.suspend	= ucb1x00_suspend,
+	.resume		= ucb1x00_resume,
+};
+
+static int __init ucb1x00_init(void)
+{
+	int ret = class_register(&ucb1x00_class);
+	if (ret == 0) {
+		ret = mcp_driver_register(&ucb1x00_driver);
+		if (ret)
+			class_unregister(&ucb1x00_class);
+	}
+	return ret;
+}
+
+static void __exit ucb1x00_exit(void)
+{
+	mcp_driver_unregister(&ucb1x00_driver);
+	class_unregister(&ucb1x00_class);
+}
+
+module_init(ucb1x00_init);
+module_exit(ucb1x00_exit);
+
+EXPORT_SYMBOL(ucb1x00_io_set_dir);
+EXPORT_SYMBOL(ucb1x00_io_write);
+EXPORT_SYMBOL(ucb1x00_io_read);
+
+EXPORT_SYMBOL(ucb1x00_adc_enable);
+EXPORT_SYMBOL(ucb1x00_adc_read);
+EXPORT_SYMBOL(ucb1x00_adc_disable);
+
+EXPORT_SYMBOL(ucb1x00_hook_irq);
+EXPORT_SYMBOL(ucb1x00_free_irq);
+EXPORT_SYMBOL(ucb1x00_enable_irq);
+EXPORT_SYMBOL(ucb1x00_disable_irq);
+
+EXPORT_SYMBOL(ucb1x00_register_driver);
+EXPORT_SYMBOL(ucb1x00_unregister_driver);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("UCB1x00 core driver");
+MODULE_LICENSE("GPL");

drivers/mfd/ucb1x00-ts.c

@@ -0,0 +1,448 @@
+/*
+ *  Touchscreen driver for UCB1x00-based touchscreens
+ *
+ *  Copyright (C) 2001 Russell King, All Rights Reserved.
+ *  Copyright (C) 2005 Pavel Machek
+ *
+ * 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.
+ *
+ * 21-Jan-2002 <jco@ict.es> :
+ *
+ * Added support for synchronous A/D mode. This mode is useful to
+ * avoid noise induced in the touchpanel by the LCD, provided that
+ * the UCB1x00 has a valid LCD sync signal routed to its ADCSYNC pin.
+ * It is important to note that the signal connected to the ADCSYNC
+ * pin should provide pulses even when the LCD is blanked, otherwise
+ * a pen touch needed to unblank the LCD will never be read.
+ */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/sched.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/input.h>
+#include <linux/device.h>
+#include <linux/freezer.h>
+#include <linux/slab.h>
+#include <linux/kthread.h>
+
+#include <asm/dma.h>
+#include <asm/semaphore.h>
+#include <asm/arch/collie.h>
+#include <asm/mach-types.h>
+
+#include "ucb1x00.h"
+
+
+struct ucb1x00_ts {
+	struct input_dev	*idev;
+	struct ucb1x00		*ucb;
+
+	wait_queue_head_t	irq_wait;
+	struct task_struct	*rtask;
+	u16			x_res;
+	u16			y_res;
+
+	unsigned int		restart:1;
+	unsigned int		adcsync:1;
+};
+
+static int adcsync;
+
+static inline void ucb1x00_ts_evt_add(struct ucb1x00_ts *ts, u16 pressure, u16 x, u16 y)
+{
+	struct input_dev *idev = ts->idev;
+
+	input_report_abs(idev, ABS_X, x);
+	input_report_abs(idev, ABS_Y, y);
+	input_report_abs(idev, ABS_PRESSURE, pressure);
+	input_sync(idev);
+}
+
+static inline void ucb1x00_ts_event_release(struct ucb1x00_ts *ts)
+{
+	struct input_dev *idev = ts->idev;
+
+	input_report_abs(idev, ABS_PRESSURE, 0);
+	input_sync(idev);
+}
+
+/*
+ * Switch to interrupt mode.
+ */
+static inline void ucb1x00_ts_mode_int(struct ucb1x00_ts *ts)
+{
+	ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+			UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW |
+			UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND |
+			UCB_TS_CR_MODE_INT);
+}
+
+/*
+ * Switch to pressure mode, and read pressure.  We don't need to wait
+ * here, since both plates are being driven.
+ */
+static inline unsigned int ucb1x00_ts_read_pressure(struct ucb1x00_ts *ts)
+{
+	if (machine_is_collie()) {
+		ucb1x00_io_write(ts->ucb, COLLIE_TC35143_GPIO_TBL_CHK, 0);
+		ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+				  UCB_TS_CR_TSPX_POW | UCB_TS_CR_TSMX_POW |
+				  UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
+
+		udelay(55);
+
+		return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_AD2, ts->adcsync);
+	} else {
+		ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+				  UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW |
+				  UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND |
+				  UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+
+		return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync);
+	}
+}
+
+/*
+ * Switch to X position mode and measure Y plate.  We switch the plate
+ * configuration in pressure mode, then switch to position mode.  This
+ * gives a faster response time.  Even so, we need to wait about 55us
+ * for things to stabilise.
+ */
+static inline unsigned int ucb1x00_ts_read_xpos(struct ucb1x00_ts *ts)
+{
+	if (machine_is_collie())
+		ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK);
+	else {
+		ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+				  UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
+				  UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+		ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+				  UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
+				  UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+	}
+	ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+			UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
+			UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
+
+	udelay(55);
+
+	return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync);
+}
+
+/*
+ * Switch to Y position mode and measure X plate.  We switch the plate
+ * configuration in pressure mode, then switch to position mode.  This
+ * gives a faster response time.  Even so, we need to wait about 55us
+ * for things to stabilise.
+ */
+static inline unsigned int ucb1x00_ts_read_ypos(struct ucb1x00_ts *ts)
+{
+	if (machine_is_collie())
+		ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK);
+	else {
+		ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+				  UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
+				  UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+		ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+				  UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
+				  UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+	}
+
+	ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+			UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
+			UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
+
+	udelay(55);
+
+	return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPX, ts->adcsync);
+}
+
+/*
+ * Switch to X plate resistance mode.  Set MX to ground, PX to
+ * supply.  Measure current.
+ */
+static inline unsigned int ucb1x00_ts_read_xres(struct ucb1x00_ts *ts)
+{
+	ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+			UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
+			UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+	return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync);
+}
+
+/*
+ * Switch to Y plate resistance mode.  Set MY to ground, PY to
+ * supply.  Measure current.
+ */
+static inline unsigned int ucb1x00_ts_read_yres(struct ucb1x00_ts *ts)
+{
+	ucb1x00_reg_write(ts->ucb, UCB_TS_CR,
+			UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
+			UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
+	return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync);
+}
+
+static inline int ucb1x00_ts_pen_down(struct ucb1x00_ts *ts)
+{
+	unsigned int val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR);
+
+	if (machine_is_collie())
+		return (!(val & (UCB_TS_CR_TSPX_LOW)));
+	else
+		return (val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW));
+}
+
+/*
+ * This is a RT kernel thread that handles the ADC accesses
+ * (mainly so we can use semaphores in the UCB1200 core code
+ * to serialise accesses to the ADC).
+ */
+static int ucb1x00_thread(void *_ts)
+{
+	struct ucb1x00_ts *ts = _ts;
+	struct task_struct *tsk = current;
+	DECLARE_WAITQUEUE(wait, tsk);
+	int valid;
+
+	/*
+	 * We could run as a real-time thread.  However, thus far
+	 * this doesn't seem to be necessary.
+	 */
+//	tsk->policy = SCHED_FIFO;
+//	tsk->rt_priority = 1;
+
+	valid = 0;
+
+	add_wait_queue(&ts->irq_wait, &wait);
+	while (!kthread_should_stop()) {
+		unsigned int x, y, p;
+		signed long timeout;
+
+		ts->restart = 0;
+
+		ucb1x00_adc_enable(ts->ucb);
+
+		x = ucb1x00_ts_read_xpos(ts);
+		y = ucb1x00_ts_read_ypos(ts);
+		p = ucb1x00_ts_read_pressure(ts);
+
+		/*
+		 * Switch back to interrupt mode.
+		 */
+		ucb1x00_ts_mode_int(ts);
+		ucb1x00_adc_disable(ts->ucb);
+
+		msleep(10);
+
+		ucb1x00_enable(ts->ucb);
+
+
+		if (ucb1x00_ts_pen_down(ts)) {
+			set_task_state(tsk, TASK_INTERRUPTIBLE);
+
+			ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, machine_is_collie() ? UCB_RISING : UCB_FALLING);
+			ucb1x00_disable(ts->ucb);
+
+			/*
+			 * If we spat out a valid sample set last time,
+			 * spit out a "pen off" sample here.
+			 */
+			if (valid) {
+				ucb1x00_ts_event_release(ts);
+				valid = 0;
+			}
+
+			timeout = MAX_SCHEDULE_TIMEOUT;
+		} else {
+			ucb1x00_disable(ts->ucb);
+
+			/*
+			 * Filtering is policy.  Policy belongs in user
+			 * space.  We therefore leave it to user space
+			 * to do any filtering they please.
+			 */
+			if (!ts->restart) {
+				ucb1x00_ts_evt_add(ts, p, x, y);
+				valid = 1;
+			}
+
+			set_task_state(tsk, TASK_INTERRUPTIBLE);
+			timeout = HZ / 100;
+		}
+
+		try_to_freeze();
+
+		schedule_timeout(timeout);
+	}
+
+	remove_wait_queue(&ts->irq_wait, &wait);
+
+	ts->rtask = NULL;
+	return 0;
+}
+
+/*
+ * We only detect touch screen _touches_ with this interrupt
+ * handler, and even then we just schedule our task.
+ */
+static void ucb1x00_ts_irq(int idx, void *id)
+{
+	struct ucb1x00_ts *ts = id;
+
+	ucb1x00_disable_irq(ts->ucb, UCB_IRQ_TSPX, UCB_FALLING);
+	wake_up(&ts->irq_wait);
+}
+
+static int ucb1x00_ts_open(struct input_dev *idev)
+{
+	struct ucb1x00_ts *ts = idev->private;
+	int ret = 0;
+
+	BUG_ON(ts->rtask);
+
+	init_waitqueue_head(&ts->irq_wait);
+	ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts);
+	if (ret < 0)
+		goto out;
+
+	/*
+	 * If we do this at all, we should allow the user to
+	 * measure and read the X and Y resistance at any time.
+	 */
+	ucb1x00_adc_enable(ts->ucb);
+	ts->x_res = ucb1x00_ts_read_xres(ts);
+	ts->y_res = ucb1x00_ts_read_yres(ts);
+	ucb1x00_adc_disable(ts->ucb);
+
+	ts->rtask = kthread_run(ucb1x00_thread, ts, "ktsd");
+	if (!IS_ERR(ts->rtask)) {
+		ret = 0;
+	} else {
+		ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts);
+		ts->rtask = NULL;
+		ret = -EFAULT;
+	}
+
+ out:
+	return ret;
+}
+
+/*
+ * Release touchscreen resources.  Disable IRQs.
+ */
+static void ucb1x00_ts_close(struct input_dev *idev)
+{
+	struct ucb1x00_ts *ts = idev->private;
+
+	if (ts->rtask)
+		kthread_stop(ts->rtask);
+
+	ucb1x00_enable(ts->ucb);
+	ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts);
+	ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 0);
+	ucb1x00_disable(ts->ucb);
+}
+
+#ifdef CONFIG_PM
+static int ucb1x00_ts_resume(struct ucb1x00_dev *dev)
+{
+	struct ucb1x00_ts *ts = dev->priv;
+
+	if (ts->rtask != NULL) {
+		/*
+		 * Restart the TS thread to ensure the
+		 * TS interrupt mode is set up again
+		 * after sleep.
+		 */
+		ts->restart = 1;
+		wake_up(&ts->irq_wait);
+	}
+	return 0;
+}
+#else
+#define ucb1x00_ts_resume NULL
+#endif
+
+
+/*
+ * Initialisation.
+ */
+static int ucb1x00_ts_add(struct ucb1x00_dev *dev)
+{
+	struct ucb1x00_ts *ts;
+	struct input_dev *idev;
+	int err;
+
+	ts = kzalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL);
+	idev = input_allocate_device();
+	if (!ts || !idev) {
+		err = -ENOMEM;
+		goto fail;
+	}
+
+	ts->ucb = dev->ucb;
+	ts->idev = idev;
+	ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC;
+
+	idev->private    = ts;
+	idev->name       = "Touchscreen panel";
+	idev->id.product = ts->ucb->id;
+	idev->open       = ucb1x00_ts_open;
+	idev->close      = ucb1x00_ts_close;
+
+	__set_bit(EV_ABS, idev->evbit);
+	__set_bit(ABS_X, idev->absbit);
+	__set_bit(ABS_Y, idev->absbit);
+	__set_bit(ABS_PRESSURE, idev->absbit);
+
+	err = input_register_device(idev);
+	if (err)
+		goto fail;
+
+	dev->priv = ts;
+
+	return 0;
+
+ fail:
+	input_free_device(idev);
+	kfree(ts);
+	return err;
+}
+
+static void ucb1x00_ts_remove(struct ucb1x00_dev *dev)
+{
+	struct ucb1x00_ts *ts = dev->priv;
+
+	input_unregister_device(ts->idev);
+	kfree(ts);
+}
+
+static struct ucb1x00_driver ucb1x00_ts_driver = {
+	.add		= ucb1x00_ts_add,
+	.remove		= ucb1x00_ts_remove,
+	.resume		= ucb1x00_ts_resume,
+};
+
+static int __init ucb1x00_ts_init(void)
+{
+	return ucb1x00_register_driver(&ucb1x00_ts_driver);
+}
+
+static void __exit ucb1x00_ts_exit(void)
+{
+	ucb1x00_unregister_driver(&ucb1x00_ts_driver);
+}
+
+module_param(adcsync, int, 0444);
+module_init(ucb1x00_ts_init);
+module_exit(ucb1x00_ts_exit);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("UCB1x00 touchscreen driver");
+MODULE_LICENSE("GPL");

drivers/mfd/ucb1x00.h

@@ -0,0 +1,255 @@
+/*
+ *  linux/drivers/mfd/ucb1x00.h
+ *
+ *  Copyright (C) 2001 Russell King, All Rights Reserved.
+ *
+ * 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.
+ */
+#ifndef UCB1200_H
+#define UCB1200_H
+
+#define UCB_IO_DATA	0x00
+#define UCB_IO_DIR	0x01
+
+#define UCB_IO_0		(1 << 0)
+#define UCB_IO_1		(1 << 1)
+#define UCB_IO_2		(1 << 2)
+#define UCB_IO_3		(1 << 3)
+#define UCB_IO_4		(1 << 4)
+#define UCB_IO_5		(1 << 5)
+#define UCB_IO_6		(1 << 6)
+#define UCB_IO_7		(1 << 7)
+#define UCB_IO_8		(1 << 8)
+#define UCB_IO_9		(1 << 9)
+
+#define UCB_IE_RIS	0x02
+#define UCB_IE_FAL	0x03
+#define UCB_IE_STATUS	0x04
+#define UCB_IE_CLEAR	0x04
+#define UCB_IE_ADC		(1 << 11)
+#define UCB_IE_TSPX		(1 << 12)
+#define UCB_IE_TSMX		(1 << 13)
+#define UCB_IE_TCLIP		(1 << 14)
+#define UCB_IE_ACLIP		(1 << 15)
+
+#define UCB_IRQ_TSPX		12
+
+#define UCB_TC_A	0x05
+#define UCB_TC_A_LOOP		(1 << 7)	/* UCB1200 */
+#define UCB_TC_A_AMPL		(1 << 7)	/* UCB1300 */
+
+#define UCB_TC_B	0x06
+#define UCB_TC_B_VOICE_ENA	(1 << 3)
+#define UCB_TC_B_CLIP		(1 << 4)
+#define UCB_TC_B_ATT		(1 << 6)
+#define UCB_TC_B_SIDE_ENA	(1 << 11)
+#define UCB_TC_B_MUTE		(1 << 13)
+#define UCB_TC_B_IN_ENA		(1 << 14)
+#define UCB_TC_B_OUT_ENA	(1 << 15)
+
+#define UCB_AC_A	0x07
+#define UCB_AC_B	0x08
+#define UCB_AC_B_LOOP		(1 << 8)
+#define UCB_AC_B_MUTE		(1 << 13)
+#define UCB_AC_B_IN_ENA		(1 << 14)
+#define UCB_AC_B_OUT_ENA	(1 << 15)
+
+#define UCB_TS_CR	0x09
+#define UCB_TS_CR_TSMX_POW	(1 << 0)
+#define UCB_TS_CR_TSPX_POW	(1 << 1)
+#define UCB_TS_CR_TSMY_POW	(1 << 2)
+#define UCB_TS_CR_TSPY_POW	(1 << 3)
+#define UCB_TS_CR_TSMX_GND	(1 << 4)
+#define UCB_TS_CR_TSPX_GND	(1 << 5)
+#define UCB_TS_CR_TSMY_GND	(1 << 6)
+#define UCB_TS_CR_TSPY_GND	(1 << 7)
+#define UCB_TS_CR_MODE_INT	(0 << 8)
+#define UCB_TS_CR_MODE_PRES	(1 << 8)
+#define UCB_TS_CR_MODE_POS	(2 << 8)
+#define UCB_TS_CR_BIAS_ENA	(1 << 11)
+#define UCB_TS_CR_TSPX_LOW	(1 << 12)
+#define UCB_TS_CR_TSMX_LOW	(1 << 13)
+
+#define UCB_ADC_CR	0x0a
+#define UCB_ADC_SYNC_ENA	(1 << 0)
+#define UCB_ADC_VREFBYP_CON	(1 << 1)
+#define UCB_ADC_INP_TSPX	(0 << 2)
+#define UCB_ADC_INP_TSMX	(1 << 2)
+#define UCB_ADC_INP_TSPY	(2 << 2)
+#define UCB_ADC_INP_TSMY	(3 << 2)
+#define UCB_ADC_INP_AD0		(4 << 2)
+#define UCB_ADC_INP_AD1		(5 << 2)
+#define UCB_ADC_INP_AD2		(6 << 2)
+#define UCB_ADC_INP_AD3		(7 << 2)
+#define UCB_ADC_EXT_REF		(1 << 5)
+#define UCB_ADC_START		(1 << 7)
+#define UCB_ADC_ENA		(1 << 15)
+
+#define UCB_ADC_DATA	0x0b
+#define UCB_ADC_DAT_VAL		(1 << 15)
+#define UCB_ADC_DAT(x)		(((x) & 0x7fe0) >> 5)
+
+#define UCB_ID		0x0c
+#define UCB_ID_1200		0x1004
+#define UCB_ID_1300		0x1005
+#define UCB_ID_TC35143          0x9712
+
+#define UCB_MODE	0x0d
+#define UCB_MODE_DYN_VFLAG_ENA	(1 << 12)
+#define UCB_MODE_AUD_OFF_CAN	(1 << 13)
+
+#include "mcp.h"
+
+struct ucb1x00_irq {
+	void *devid;
+	void (*fn)(int, void *);
+};
+
+struct ucb1x00 {
+	spinlock_t		lock;
+	struct mcp		*mcp;
+	unsigned int		irq;
+	struct semaphore	adc_sem;
+	spinlock_t		io_lock;
+	u16			id;
+	u16			io_dir;
+	u16			io_out;
+	u16			adc_cr;
+	u16			irq_fal_enbl;
+	u16			irq_ris_enbl;
+	struct ucb1x00_irq	irq_handler[16];
+	struct class_device	cdev;
+	struct list_head	node;
+	struct list_head	devs;
+};
+
+struct ucb1x00_driver;
+
+struct ucb1x00_dev {
+	struct list_head	dev_node;
+	struct list_head	drv_node;
+	struct ucb1x00		*ucb;
+	struct ucb1x00_driver	*drv;
+	void			*priv;
+};
+
+struct ucb1x00_driver {
+	struct list_head	node;
+	struct list_head	devs;
+	int	(*add)(struct ucb1x00_dev *dev);
+	void	(*remove)(struct ucb1x00_dev *dev);
+	int	(*suspend)(struct ucb1x00_dev *dev, pm_message_t state);
+	int	(*resume)(struct ucb1x00_dev *dev);
+};
+
+#define classdev_to_ucb1x00(cd)	container_of(cd, struct ucb1x00, cdev)
+
+int ucb1x00_register_driver(struct ucb1x00_driver *);
+void ucb1x00_unregister_driver(struct ucb1x00_driver *);
+
+/**
+ *	ucb1x00_clkrate - return the UCB1x00 SIB clock rate
+ *	@ucb: UCB1x00 structure describing chip
+ *
+ *	Return the SIB clock rate in Hz.
+ */
+static inline unsigned int ucb1x00_clkrate(struct ucb1x00 *ucb)
+{
+	return mcp_get_sclk_rate(ucb->mcp);
+}
+
+/**
+ *	ucb1x00_enable - enable the UCB1x00 SIB clock
+ *	@ucb: UCB1x00 structure describing chip
+ *
+ *	Enable the SIB clock.  This can be called multiple times.
+ */
+static inline void ucb1x00_enable(struct ucb1x00 *ucb)
+{
+	mcp_enable(ucb->mcp);
+}
+
+/**
+ *	ucb1x00_disable - disable the UCB1x00 SIB clock
+ *	@ucb: UCB1x00 structure describing chip
+ *
+ *	Disable the SIB clock.  The SIB clock will only be disabled
+ *	when the number of ucb1x00_enable calls match the number of
+ *	ucb1x00_disable calls.
+ */
+static inline void ucb1x00_disable(struct ucb1x00 *ucb)
+{
+	mcp_disable(ucb->mcp);
+}
+
+/**
+ *	ucb1x00_reg_write - write a UCB1x00 register
+ *	@ucb: UCB1x00 structure describing chip
+ *	@reg: UCB1x00 4-bit register index to write
+ *	@val: UCB1x00 16-bit value to write
+ *
+ *	Write the UCB1x00 register @reg with value @val.  The SIB
+ *	clock must be running for this function to return.
+ */
+static inline void ucb1x00_reg_write(struct ucb1x00 *ucb, unsigned int reg, unsigned int val)
+{
+	mcp_reg_write(ucb->mcp, reg, val);
+}
+
+/**
+ *	ucb1x00_reg_read - read a UCB1x00 register
+ *	@ucb: UCB1x00 structure describing chip
+ *	@reg: UCB1x00 4-bit register index to write
+ *
+ *	Read the UCB1x00 register @reg and return its value.  The SIB
+ *	clock must be running for this function to return.
+ */
+static inline unsigned int ucb1x00_reg_read(struct ucb1x00 *ucb, unsigned int reg)
+{
+	return mcp_reg_read(ucb->mcp, reg);
+}
+/**
+ *	ucb1x00_set_audio_divisor - 
+ *	@ucb: UCB1x00 structure describing chip
+ *	@div: SIB clock divisor
+ */
+static inline void ucb1x00_set_audio_divisor(struct ucb1x00 *ucb, unsigned int div)
+{
+	mcp_set_audio_divisor(ucb->mcp, div);
+}
+
+/**
+ *	ucb1x00_set_telecom_divisor -
+ *	@ucb: UCB1x00 structure describing chip
+ *	@div: SIB clock divisor
+ */
+static inline void ucb1x00_set_telecom_divisor(struct ucb1x00 *ucb, unsigned int div)
+{
+	mcp_set_telecom_divisor(ucb->mcp, div);
+}
+
+void ucb1x00_io_set_dir(struct ucb1x00 *ucb, unsigned int, unsigned int);
+void ucb1x00_io_write(struct ucb1x00 *ucb, unsigned int, unsigned int);
+unsigned int ucb1x00_io_read(struct ucb1x00 *ucb);
+
+#define UCB_NOSYNC	(0)
+#define UCB_SYNC	(1)
+
+unsigned int ucb1x00_adc_read(struct ucb1x00 *ucb, int adc_channel, int sync);
+void ucb1x00_adc_enable(struct ucb1x00 *ucb);
+void ucb1x00_adc_disable(struct ucb1x00 *ucb);
+
+/*
+ * Which edges of the IRQ do you want to control today?
+ */
+#define UCB_RISING	(1 << 0)
+#define UCB_FALLING	(1 << 1)
+
+int ucb1x00_hook_irq(struct ucb1x00 *ucb, unsigned int idx, void (*fn)(int, void *), void *devid);
+void ucb1x00_enable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges);
+void ucb1x00_disable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges);
+int ucb1x00_free_irq(struct ucb1x00 *ucb, unsigned int idx, void *devid);
+
+#endif