+++ /dev/null
-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
projects / 15.05 / openwrt.git / blobdiff