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openwrt-owl/target/linux/coldfire/patches/055-m547x_8x_i2c.patch

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From ce57fc22543d0ee0ca33157264815a52fc8cf9a3 Mon Sep 17 00:00:00 2001
From: Kurt Mahan <kmahan@freescale.com>
Date: Thu, 15 May 2008 13:23:27 -0600
Subject: [PATCH] Add I2C bus driver for MCF547x and MCF548x.
LTIBName: m547x-8x-i2c
Signed-off-by: Kurt Mahan <kmahan@freescale.com>
Signed-off-by: Shrek Wu <b16972@freescale.com>
---
arch/m68k/coldfire/Makefile | 1 +
arch/m68k/coldfire/mcf548x-devices.c | 94 ++++++
drivers/i2c/busses/Kconfig | 12 +
drivers/i2c/busses/Makefile | 1 +
drivers/i2c/busses/i2c-algo-mcf.h | 23 ++
drivers/i2c/busses/i2c-mcf548x.c | 573 ++++++++++++++++++++++++++++++++++
include/asm-m68k/m5485i2c.h | 45 +++
7 files changed, 749 insertions(+), 0 deletions(-)
create mode 100644 arch/m68k/coldfire/mcf548x-devices.c
create mode 100644 drivers/i2c/busses/i2c-algo-mcf.h
create mode 100644 drivers/i2c/busses/i2c-mcf548x.c
create mode 100644 include/asm-m68k/m5485i2c.h
--- a/arch/m68k/coldfire/Makefile
+++ b/arch/m68k/coldfire/Makefile
@@ -11,4 +11,5 @@ endif
obj-$(CONFIG_PCI) += pci.o mcf5445x-pci.o iomap.o
obj-$(CONFIG_M54455) += mcf5445x-devices.o
obj-$(CONFIG_M547X_8X) += m547x_8x-devices.o
+obj-$(CONFIG_M547X_8X) += mcf548x-devices.o
obj-$(CONFIG_MCD_DMA) += m547x_8x-dma.o
--- /dev/null
+++ b/arch/m68k/coldfire/mcf548x-devices.c
@@ -0,0 +1,94 @@
+/*
+ * arch/m68k/coldfire/mcf5445x-devices.c
+ *
+ * Coldfire M5445x Platform Device Configuration
+ *
+ * Based on the Freescale MXC devices.c
+ *
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ * Kurt Mahan <kmahan@freescale.com>
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mtd/physmap.h>
+#include <linux/platform_device.h>
+#include <linux/fsl_devices.h>
+
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+
+static struct resource coldfire_i2c_resources[] = {
+ [0] = { /* I/O */
+ .start = MCF_MBAR + 0x008F00,
+ .end = MCF_MBAR + 0x008F20,
+ .flags = IORESOURCE_MEM,
+ },
+ [2] = { /* IRQ */
+ .start = 40,
+ .end = 40,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device coldfire_i2c_device = {
+ .name = "MCF548X-i2c",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(coldfire_i2c_resources),
+ .resource = coldfire_i2c_resources,
+};
+
+static struct resource coldfire_sec_resources[] = {
+ [0] = { /* I/O */
+ .start = MCF_MBAR + 0x00020000,
+ .end = MCF_MBAR + 0x00033000,
+ .flags = IORESOURCE_MEM,
+ },
+ [2] = { /* IRQ */
+ .start = ISC_SEC,
+ .end = ISC_SEC,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device coldfire_sec_device = {
+ .name = "fsl-sec1",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(coldfire_sec_resources),
+ .resource = coldfire_sec_resources,
+};
+
+#if defined(CONFIG_MTD_PHYSMAP)
+static struct physmap_flash_data mcf5485_flash_data = {
+ .width = 2,
+};
+
+static struct resource mcf5485_flash_resource = {
+ .start = 0xf8000000,
+ .end = 0xf80fffff,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device mcf5485_flash_device = {
+ .name = "physmap-flash",
+ .id = 0,
+ .dev = {
+ .platform_data = &mcf5485_flash_data,
+ },
+ .num_resources = 1,
+ .resource = &mcf5485_flash_resource,
+};
+#endif
+
+static int __init mcf5485_init_devices(void)
+{
+ printk(KERN_INFO "MCF5485x INIT_DEVICES\n");
+
+ platform_device_register(&coldfire_i2c_device);
+ platform_device_register(&coldfire_sec_device);
+/*#if defined(CONFIG_MTD_PHYSMAP)
+ platform_device_register(&mcf5485_flash_device);
+#endif*/
+ return 0;
+}
+arch_initcall(mcf5485_init_devices);
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -4,6 +4,18 @@
menu "I2C Hardware Bus support"
+config I2C_MCF548x
+ tristate "I2C MCF547x/548x interfaces"
+ depends on I2C
+ help
+ This allows you to use the I2C adapters found on the Freescale
+ MCF547x/548x microcontrollers.
+ Say Y if you own an I2C adapter belonging to this class and then say
+ Y to the specific driver for you adapter below.
+
+ This support is also available as a module. If so, the module
+ will be called i2c-algo-mcf.
+
config I2C_ALI1535
tristate "ALI 1535"
depends on PCI
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -52,6 +52,7 @@ obj-$(CONFIG_I2C_VIAPRO) += i2c-viapro.o
obj-$(CONFIG_I2C_VOODOO3) += i2c-voodoo3.o
obj-$(CONFIG_SCx200_ACB) += scx200_acb.o
obj-$(CONFIG_SCx200_I2C) += scx200_i2c.o
+obj-$(CONFIG_I2C_MCF548x) += i2c-mcf548x.o
ifeq ($(CONFIG_I2C_DEBUG_BUS),y)
EXTRA_CFLAGS += -DDEBUG
--- /dev/null
+++ b/drivers/i2c/busses/i2c-algo-mcf.h
@@ -0,0 +1,23 @@
+#ifndef I2C_ALGO_MCF_H
+#define I2C_ALGO_MCF_H 1
+
+/* --- Defines for pcf-adapters --------------------------------------- */
+#include <linux/i2c.h>
+
+struct i2c_algo_mcf_data {
+ void *data; /* private data for lolevel routines */
+ void (*setmcf) (void *data, int ctl, int val);
+ int (*getmcf) (void *data, int ctl);
+ int (*getown) (void *data);
+ int (*getclock) (void *data);
+ void (*waitforpin) (void);
+ /* local settings */
+ int udelay;
+ int mdelay;
+ int timeout;
+};
+
+int i2c_mcf_add_bus(struct i2c_adapter *);
+int i2c_mcf_del_bus(struct i2c_adapter *);
+
+#endif /* I2C_ALGO_MCF_H */
--- /dev/null
+++ b/drivers/i2c/busses/i2c-mcf548x.c
@@ -0,0 +1,573 @@
+/*
+ * Performance and stability improvements: (C) Copyright 2008,
+ * Adrian Cox <adrian@humboldt.co.uk>
+ * ColdFire 547x/548x I2C master support
+ * Shrek Wu (b16972@freescale.com )moved the code driver/i2c/alg/mcf.c
+ * into driver/i2c/busses.And changed the driver to a platform driver.
+ */
+#include <linux/i2c.h>
+#include "i2c-algo-mcf.h"
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <asm/io.h>
+
+#include <asm/coldfire.h>
+#include <asm/m5485sim.h>
+#include <asm/m5485i2c.h>
+
+#define get_clock(adap) (clock)
+#define get_own(adap) (own)
+
+static int clock = 0x3b; /*50000 / 1024 ~ 49 KHz*/
+module_param(clock, int, 0);
+MODULE_PARM_DESC(clock,
+ "Set I2C clock in kHz: 400=fast mode (default == 49khz)");
+
+static int own = 0x78;
+module_param(own, int, 0);
+MODULE_PARM_DESC(clock, "Set I2C Master controller address(0x78)");
+
+static struct i2c_algo_mcf_data i2c_mcf_board_data = {
+ .timeout = 10000,
+};
+
+static struct i2c_adapter i2c_mcf_board_adapter = {
+ .owner = THIS_MODULE,
+ .name = "MCF5485 adapter",
+ .id = I2C_HW_MPC107,
+ .algo_data = &i2c_mcf_board_data,
+ .class = I2C_CLASS_HWMON,
+ .timeout = 1,
+ .retries = 1
+};
+/*
+ * static void i2c_start()
+ *
+ * Generates START signal
+ */
+static void
+i2c_start(
+ struct i2c_algo_mcf_data *adap
+) {
+ MCF_I2CR |= MCF_I2CR_MSTA;
+}
+
+
+/*
+ * static void i2c_stop()
+ *
+ * Generates STOP signal
+ */
+static void
+i2c_stop(
+ struct i2c_algo_mcf_data *adap
+) {
+ MCF_I2CR &= ~MCF_I2CR_MSTA;
+}
+
+static int
+i2c_getack(
+ struct i2c_algo_mcf_data *adap
+) {
+ return !(MCF_I2SR & MCF_I2SR_RXAK);
+}
+
+/*
+ * static void i2c_repstart()
+ *
+ * Generates repeated start signal (without STOP while mastering the bus)
+ */
+static void
+i2c_repstart(
+ struct i2c_algo_mcf_data *adap
+) {
+ MCF_I2CR |= MCF_I2CR_RSTA;
+ MCF_I2CR |= MCF_I2CR_MTX;
+}
+
+
+/*
+ * static void wait_for_bb()
+ *
+ * Wait for bus idle state
+ */
+static int
+wait_for_bb(
+ struct i2c_algo_mcf_data *adap
+) {
+ int i;
+ for (i = 0; i < adap->timeout; i++) {
+ if (!(MCF_I2SR & MCF_I2SR_IBB))
+ return 0;
+ udelay(10);
+ }
+ printk(KERN_ERR "%s: timeout", __FUNCTION__);
+ return -ETIMEDOUT;
+}
+
+/*
+ * static void wait_for_not_bb()
+ *
+ * Wait for bus busy state
+ */
+static int
+wait_for_not_bb(
+ struct i2c_algo_mcf_data *adap
+) {
+ int i;
+ for (i = 0; i < adap->timeout; i++) {
+ if (MCF_I2SR & MCF_I2SR_IBB)
+ return 0;
+ udelay(10);
+ }
+ printk(KERN_ERR "%s: timeout", __FUNCTION__);
+ return -ETIMEDOUT;
+}
+
+/*
+ * static void wait_xfer_done()
+ *
+ * Wait for transfer to complete
+ */
+static int
+wait_xfer_done(
+ struct i2c_algo_mcf_data *adap
+) {
+ int i;
+
+ for (i = 0; i < adap->timeout; i++) {
+ if (MCF_I2SR & MCF_I2SR_IIF) {
+ MCF_I2SR &= ~MCF_I2SR_IIF;
+ return 0;
+ }
+ udelay(1);
+ }
+ printk(KERN_ERR "%s: timeout", __FUNCTION__);
+ return -ETIMEDOUT;
+}
+
+
+/*
+ * static void i2c_set_addr()
+ *
+ * Sets slave address to communicate
+ */
+static int
+i2c_set_addr(
+ struct i2c_algo_mcf_data *adap,
+ struct i2c_msg *msg,
+ int retries
+) {
+ unsigned short flags = msg->flags;
+ unsigned char addr;
+
+ if ((flags & I2C_M_TEN)) {
+ /* 10 bit address not supported yet */
+ return -EIO;
+ } else {
+ /* normal 7bit address */
+ addr = (msg->addr << 1);
+ if (flags & I2C_M_RD)
+ addr |= 1;
+ if (flags & I2C_M_REV_DIR_ADDR)
+ addr ^= 1;
+
+ MCF_I2DR = addr;
+ }
+ return 0;
+}
+
+
+/*
+ * static void mcf_i2c_init()
+ *
+ * Perform ColdFire i2c initialization
+ */
+static void
+mcf_i2c_init(struct i2c_algo_mcf_data *adap)
+{
+ u8 dummy;
+ /* Setup GPIO lines */
+ MCF_PAR_FECI2CIRQ |= MCF_PAR_SDA;
+ MCF_PAR_FECI2CIRQ |= MCF_PAR_SCL;
+
+ /* Ensure slaves are in idle state */
+ if (MCF_I2SR & MCF_I2SR_IBB) {
+ MCF_I2ICR = 0x00;
+ MCF_I2CR = 0x00;
+ MCF_I2CR = 0x0A;
+ dummy = MCF_I2DR;
+ MCF_I2SR = 0x00;
+ MCF_I2CR = 0x00;
+ MCF_I2ICR = 0x01;
+ }
+
+ /* setup SCL clock */
+ MCF_I2FDR = get_clock(adap);
+
+ /* set slave address */
+ MCF_I2AR = get_own(adap);
+
+ /* enable I2C module */
+ MCF_I2CR = MCF_I2CR_IEN;
+}
+
+static int i2c_outb(
+ struct i2c_adapter *i2c_adap,
+ char c
+) {
+
+ struct i2c_algo_mcf_data *adap = i2c_adap->algo_data;
+ int timeout;
+ /* Put data to be sent */
+ MCF_I2DR = c;
+ /* Wait for xfer completed*/
+ timeout = wait_xfer_done(adap);
+ if (timeout) {
+ i2c_stop(adap);
+ wait_for_bb(adap);
+ printk(KERN_ERR "i2c-algo-mcf: %s i2c_write: "
+ "error - timeout.\n", i2c_adap->name);
+ return -EREMOTEIO; /* got a better one ?? */
+ }
+
+ return 0;
+}
+
+
+/*
+ * static void mcf_sendbytes()
+ *
+ * Perform tx data transfer
+ */
+static int
+mcf_sendbytes(
+ struct i2c_adapter *i2c_adap,
+ const char *buf,
+ int count, int last
+) {
+ struct i2c_algo_mcf_data *adap = i2c_adap->algo_data;
+ int ret, i;
+
+ /* Set master TX mode */
+ MCF_I2CR |= MCF_I2CR_MTX;
+
+ for (i = 0; i < count; ++i) {
+ printk(KERN_DEBUG "i2c-algo-mcf: %s i2c_write: writing %2.2X\n",
+ i2c_adap->name, buf[i]&0xff);
+ ret = i2c_outb(i2c_adap, buf[i]);
+ if (ret < 0)
+ return ret;
+ }
+ if (last) {
+ i2c_stop(adap);
+ wait_for_bb(adap);
+ } else {
+ i2c_repstart(adap);
+ }
+
+ return (i);
+}
+
+
+/*
+ * static void mcf_readbytes()
+ *
+ * Perform rx data transfer
+ */
+static int
+mcf_readbytes(
+ struct i2c_adapter *i2c_adap,
+ char *buf,
+ int count, int last
+) {
+ int i;
+ struct i2c_algo_mcf_data *adap = i2c_adap->algo_data;
+ u8 dummy;
+
+ /* Set master RX mode */
+ MCF_I2CR &= ~MCF_I2CR_MTX;
+ MCF_I2CR &= ~MCF_I2CR_TXAK;
+ dummy = MCF_I2DR;
+
+ for (i = 0; i < count-1; i++) {
+ if (wait_xfer_done(adap)) {
+ i2c_stop(adap);
+ wait_for_bb(adap);
+ printk(KERN_DEBUG
+ "i2c-algo-mcf: mcf_readbytes timed out.\n");
+ return (-1);
+ }
+
+ /* store next data byte */
+ buf[i] = MCF_I2DR;
+ }
+
+ if (wait_xfer_done(adap)) {
+ i2c_stop(adap);
+ wait_for_bb(adap);
+ printk(KERN_DEBUG "i2c-algo-mcf: mcf_readbytes timed out.\n");
+ return (-1);
+ }
+
+ /* Disable acknowlege (set I2CR.TXAK) */
+ MCF_I2CR |= MCF_I2CR_TXAK;
+ buf[i] = MCF_I2DR;
+ if (wait_xfer_done(adap)) {
+ i2c_stop(adap);
+ wait_for_bb(adap);
+ printk(KERN_DEBUG "i2c-algo-mcf: mcf_readbytes timed out.\n");
+ return (-1);
+ }
+
+ if (last) {
+ i2c_stop(adap);
+ wait_for_bb(adap);
+ } else {
+ i2c_repstart(adap);
+ }
+
+ return (i+1);
+}
+
+
+/*
+ * static void mcf_xfer()
+ *
+ * Perform master data I/O transfer
+ */
+static int
+mcf_xfer(
+ struct i2c_adapter *i2c_adap,
+ struct i2c_msg *msgs,
+ int num
+) {
+ struct i2c_algo_mcf_data *adap = i2c_adap->algo_data;
+ struct i2c_msg *pmsg;
+ int i;
+ int ret = 0, timeout;
+
+ /* Skip own address */
+ if (get_own(adap) == (msgs[0].addr << 1))
+ return -EIO;
+
+ /* Ensure slaves are in idle state */
+ if (MCF_I2SR & MCF_I2SR_IBB) {
+ MCF_I2ICR = 0x00;
+ MCF_I2CR = 0x00;
+ MCF_I2CR = 0x0A;
+ timeout = MCF_I2DR;
+ MCF_I2SR = 0x00;
+ MCF_I2CR = 0x00;
+ MCF_I2ICR = 0x01;
+ }
+ /* setup SCL clock */
+ MCF_I2FDR = get_clock(adap);
+ /* set slave address */
+ MCF_I2AR = get_own(adap);
+ /* enable I2C module */
+ MCF_I2CR = MCF_I2CR_IEN;
+
+ MCF_I2CR |= MCF_I2CR_TXAK;
+
+ /* Check for bus busy */
+ wait_for_bb(adap);
+
+ for (i = 0; ret >= 0 && i < num; i++) {
+ pmsg = &msgs[i];
+
+ printk(KERN_DEBUG "i2c-algo-mcf: Doing %s %d bytes "
+ "to 0x%02x - %d of %d messages\n",
+ pmsg->flags & I2C_M_RD ? "read" : "write",
+ pmsg->len, pmsg->addr, i + 1, num);
+
+ /* Send START */
+ if (i == 0)
+ i2c_start(adap);
+
+ /* Wait for Bus Busy */
+ wait_for_not_bb(adap);
+
+ MCF_I2CR |= MCF_I2CR_MTX;
+
+ ret = i2c_set_addr(adap, pmsg, i2c_adap->retries);
+ if (ret < 0)
+ return ret;
+
+ /* Wait for address transfer completion */
+ wait_xfer_done(adap);
+
+ /* Check for ACK */
+ if (!i2c_getack(adap)) {
+ i2c_stop(adap);
+ wait_for_bb(adap);
+ printk(KERN_DEBUG "i2c-algo-mcf: No ack after "
+ "send address in mcf_xfer\n");
+ return (-EREMOTEIO);
+ }
+
+ printk(KERN_DEBUG "i2c-algo-mcf: Msg %d, "
+ "addr = 0x%x, flags = 0x%x, len = %d\n",
+ i, msgs[i].addr, msgs[i].flags, msgs[i].len);
+ /* Read */
+ if (pmsg->flags & I2C_M_RD) {
+ /* read bytes into buffer*/
+ ret = mcf_readbytes(i2c_adap, pmsg->buf, pmsg->len,
+ (i + 1 == num));
+
+ if (ret != pmsg->len) {
+ printk(KERN_DEBUG "i2c-algo-mcf: fail: "
+ "only read %d bytes.\n", ret);
+ } else {
+ printk(KERN_DEBUG "i2c-algo-mcf: "
+ "read %d bytes.\n", ret);
+ }
+ } else {
+ /* write bytes into buffer*/
+ ret = mcf_sendbytes(i2c_adap, pmsg->buf, pmsg->len,
+ (i + 1 == num));
+ if (ret != pmsg->len) {
+ printk(KERN_DEBUG "i2c-algo-mcf: fail: "
+ "only wrote %d bytes.\n", ret);
+ } else {
+ printk(KERN_DEBUG "i2c-algo-mcf: wrote"
+ "%d bytes.\n", ret);
+ }
+ }
+ }
+
+ /* Disable I2C module */
+ MCF_I2CR = 0;
+ return (i);
+}
+
+
+/*
+ * static void mcf_func()
+ *
+ * Return algorithm funtionality
+ */
+static u32
+mcf_func(
+ struct i2c_adapter *i2c_adap
+) {
+ return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
+}
+
+/*
+ * ColdFire bus algorithm callbacks
+ */
+static struct i2c_algorithm mcf_algo = {
+ .master_xfer = mcf_xfer,
+ .functionality = mcf_func,
+};
+
+/***********************************************************/
+struct coldfire_i2c {
+ void __iomem *base;
+ struct resource *irqarea;
+ struct resource *ioarea;
+ u32 irq;
+ struct i2c_adapter *adap;
+ u32 flags;
+};
+
+/*
+ * registering functions to load algorithms at runtime
+ */
+int i2c_mcf_add_bus(struct i2c_adapter *adap)
+{
+ struct i2c_algo_mcf_data *mcf_adap = adap->algo_data;
+
+ /*adap->id |= mcf_algo.id;*/
+ adap->algo = &mcf_algo;
+ adap->timeout = 100;
+
+ mcf_i2c_init(mcf_adap);
+
+#ifdef MODULE
+ MOD_INC_USE_COUNT;
+#endif
+
+ i2c_add_adapter(adap);
+
+ return 0;
+}
+
+static int mcf548x_i2c_probe(struct platform_device *pdev)
+{
+ struct coldfire_i2c *i2c;
+ int rc = 0;
+
+ /************************************************************/
+ i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
+ if (!i2c) {
+ printk(KERN_ERR "%s kzalloc coldfire_i2c faile\n",
+ __FUNCTION__);
+ return -ENOMEM;
+ }
+ /****************************************************************/
+ platform_set_drvdata(pdev, i2c);
+
+ i2c->adap = &i2c_mcf_board_adapter;
+ i2c->adap->dev.parent = &pdev->dev;
+ rc = i2c_mcf_add_bus(i2c->adap);
+ if (rc < 0) {
+ printk(KERN_ERR "%s - failed to add adapter\n", __FUNCTION__);
+ rc = -ENODEV;
+ goto fail_add;
+ }
+
+ printk(KERN_INFO "i2c-algo-mcf.o: I2C ColdFire algorithm"
+ " module is loaded.\n");
+ return rc;
+
+fail_add:
+ kfree(i2c);
+ return rc;
+};
+
+static int mcf548x_i2c_remove(struct platform_device *pdev)
+{
+ struct coldfire_i2c *i2c = platform_get_drvdata(pdev);
+
+ i2c_del_adapter(i2c->adap);
+ platform_set_drvdata(pdev, NULL);
+ iounmap(i2c->base);
+ kfree(i2c);
+ return 0;
+};
+
+/* Structure for a device driver */
+static struct platform_driver mcf548x_i2c_driver = {
+ .probe = mcf548x_i2c_probe,
+ .remove = mcf548x_i2c_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "MCF548X-i2c",
+ },
+};
+
+static int __init coldfire_i2c_init(void)
+{
+ return platform_driver_register(&mcf548x_i2c_driver);
+}
+
+static void __exit coldfire_i2c_exit(void)
+{
+ platform_driver_unregister(&mcf548x_i2c_driver);
+}
+
+module_init(coldfire_i2c_init);
+module_exit(coldfire_i2c_exit);
+
+MODULE_AUTHOR("Adrian Cox <adrian@humboldt.co.uk>");
+MODULE_DESCRIPTION
+ ("I2C-Bus adapter for MCF547x and MCF548x processors");
+MODULE_LICENSE("GPL");
--- /dev/null
+++ b/include/asm-m68k/m5485i2c.h
@@ -0,0 +1,45 @@
+/*
+ * m5485i2c.h -- ColdFire 547x/548x i2c controller support.
+ */
+#ifndef M548X_I2C_H
+#define M548X_I2C_H
+
+/* Register read/write macros */
+#define MCF_I2AR MCF_REG08(0x008F00) /* I2C Address */
+#define MCF_I2FDR MCF_REG08(0x008F04) /* I2C Frequency Divider */
+#define MCF_I2CR MCF_REG08(0x008F08) /* I2C Control */
+#define MCF_I2SR MCF_REG08(0x008F0C) /* I2C Status */
+#define MCF_I2DR MCF_REG08(0x008F10) /* I2C Data I/O */
+#define MCF_I2ICR MCF_REG08(0x008F20) /* I2C Interrupt Control */
+
+/* Bit definitions and macros for MCF_I2C_I2AR */
+#define MCF_I2AR_ADR(x) (((x)&0x7F)<<1)
+
+/* Bit definitions and macros for MCF_I2C_I2FDR */
+#define MCF_I2FDR_IC(x) (((x)&0x3F)<<0)
+
+/* Bit definitions and macros for MCF_I2C_I2CR */
+#define MCF_I2CR_RSTA (0x04)
+#define MCF_I2CR_TXAK (0x08)
+#define MCF_I2CR_MTX (0x10)
+#define MCF_I2CR_MSTA (0x20)
+#define MCF_I2CR_IIEN (0x40)
+#define MCF_I2CR_IEN (0x80)
+
+/* Bit definitions and macros for MCF_I2C_I2SR */
+#define MCF_I2SR_RXAK (0x01)
+#define MCF_I2SR_IIF (0x02)
+#define MCF_I2SR_SRW (0x04)
+#define MCF_I2SR_IAL (0x10)
+#define MCF_I2SR_IBB (0x20)
+#define MCF_I2SR_IAAS (0x40)
+#define MCF_I2SR_ICF (0x80)
+
+/* Bit definitions and macros for MCF_I2C_I2ICR */
+#define MCF_I2ICR_IE (0x01)
+#define MCF_I2ICR_RE (0x02)
+#define MCF_I2ICR_TE (0x04)
+#define MCF_I2ICR_BNBE (0x08)
+
+/********************************************************************/
+#endif
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