7 files changed, 621 insertions, 1 deletions

diff --git a/drivers/Kconfig b/drivers/Kconfig
index cecab0acc3fe..46d655fab115 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -48,6 +48,8 @@ source "drivers/hwmon/Kconfig"
 
 source "drivers/misc/Kconfig"
 
+source "drivers/mfd/Kconfig"
+
 source "drivers/media/Kconfig"
 
 source "drivers/video/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 126a851d5653..9663132ed825 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -26,7 +26,7 @@ obj-$(CONFIG_FB_INTEL)          += video/intelfb/
 obj-$(CONFIG_SERIO)             += input/serio/
 obj-y                           += serial/
 obj-$(CONFIG_PARPORT)           += parport/
-obj-y                           += base/ block/ misc/ net/ media/
+obj-y                           += base/ block/ misc/ mfd/ net/ media/
 obj-$(CONFIG_NUBUS)             += nubus/
 obj-$(CONFIG_ATM)               += atm/
 obj-$(CONFIG_PPC_PMAC)          += macintosh/
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
new file mode 100644
index 000000000000..1588a59e3767
--- /dev/null
+++ b/drivers/mfd/Kconfig
@@ -0,0 +1,16 @@
+#
+# Multifunction miscellaneous devices
+#
+
+menu "Multimedia Capabilities Port drivers"
+
+config MCP
+        tristate
+
+# Interface drivers
+config MCP_SA11X0
+        tristate "Support SA11x0 MCP interface"
+        depends on ARCH_SA1100
+        select MCP
+
+endmenu
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
new file mode 100644
index 000000000000..98bdd6a42188
--- /dev/null
+++ b/drivers/mfd/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for multifunction miscellaneous devices
+#
+
+obj-$(CONFIG_MCP)               += mcp-core.o
+obj-$(CONFIG_MCP_SA11X0)        += mcp-sa11x0.o
diff --git a/drivers/mfd/mcp-core.c b/drivers/mfd/mcp-core.c
new file mode 100644
index 000000000000..c75d713c01e4
--- /dev/null
+++ b/drivers/mfd/mcp-core.c
@@ -0,0 +1,255 @@
+/*
+ *  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 <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,
+        .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;
+        mcpdrv->drv.probe = mcp_bus_probe;
+        mcpdrv->drv.remove = mcp_bus_remove;
+        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");
diff --git a/drivers/mfd/mcp-sa11x0.c b/drivers/mfd/mcp-sa11x0.c
new file mode 100644
index 000000000000..e9806fbbe696
--- /dev/null
+++ b/drivers/mfd/mcp-sa11x0.c
@@ -0,0 +1,275 @@
+/*
+ *  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/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 device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        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;
+
+        dev_set_drvdata(dev, 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);
+        dev_set_drvdata(dev, NULL);
+
+ out:
+        return ret;
+}
+
+static int mcp_sa11x0_remove(struct device *dev)
+{
+        struct mcp *mcp = dev_get_drvdata(dev);
+
+        dev_set_drvdata(dev, NULL);
+        mcp_host_unregister(mcp);
+        release_mem_region(0x80060000, 0x60);
+
+        return 0;
+}
+
+static int mcp_sa11x0_suspend(struct device *dev, pm_message_t state, u32 level)
+{
+        struct mcp *mcp = dev_get_drvdata(dev);
+
+        if (level == SUSPEND_DISABLE) {
+                priv(mcp)->mccr0 = Ser4MCCR0;
+                priv(mcp)->mccr1 = Ser4MCCR1;
+                Ser4MCCR0 &= ~MCCR0_MCE;
+        }
+        return 0;
+}
+
+static int mcp_sa11x0_resume(struct device *dev, u32 level)
+{
+        struct mcp *mcp = dev_get_drvdata(dev);
+
+        if (level == RESUME_RESTORE_STATE) {
+                Ser4MCCR1 = priv(mcp)->mccr1;
+                Ser4MCCR0 = priv(mcp)->mccr0;
+        }
+        return 0;
+}
+
+/*
+ * The driver for the SA11x0 MCP port.
+ */
+static struct device_driver mcp_sa11x0_driver = {
+        .name           = "sa11x0-mcp",
+        .bus            = &platform_bus_type,
+        .probe          = mcp_sa11x0_probe,
+        .remove         = mcp_sa11x0_remove,
+        .suspend        = mcp_sa11x0_suspend,
+        .resume         = mcp_sa11x0_resume,
+};
+
+/*
+ * This needs re-working
+ */
+static int __init mcp_sa11x0_init(void)
+{
+        return driver_register(&mcp_sa11x0_driver);
+}
+
+static void __exit mcp_sa11x0_exit(void)
+{
+        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");
diff --git a/drivers/mfd/mcp.h b/drivers/mfd/mcp.h
new file mode 100644
index 000000000000..c093a93b8808
--- /dev/null
+++ b/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