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-rw-r--r--target/linux/coldfire/patches/055-m547x_8x_i2c.patch808
1 files changed, 808 insertions, 0 deletions
diff --git a/target/linux/coldfire/patches/055-m547x_8x_i2c.patch b/target/linux/coldfire/patches/055-m547x_8x_i2c.patch
new file mode 100644
index 0000000..0a2a277
--- /dev/null
+++ b/target/linux/coldfire/patches/055-m547x_8x_i2c.patch
@@ -0,0 +1,808 @@
+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
generated by cgit v1.1 at 2024-12-30 12:46:54 +0000