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-rw-r--r--drivers/i2c-slave/Kconfig39
-rw-r--r--drivers/i2c-slave/Makefile8
-rw-r--r--drivers/i2c-slave/i2c_slave_client.c81
-rw-r--r--drivers/i2c-slave/i2c_slave_core.c359
-rw-r--r--drivers/i2c-slave/i2c_slave_device.c271
-rw-r--r--drivers/i2c-slave/i2c_slave_device.h79
-rw-r--r--drivers/i2c-slave/i2c_slave_ring_buffer.c185
-rw-r--r--drivers/i2c-slave/i2c_slave_ring_buffer.h39
-rw-r--r--drivers/i2c-slave/mxc_i2c_slave.c335
-rw-r--r--drivers/i2c-slave/mxc_i2c_slave.h44
-rw-r--r--drivers/i2c-slave/mxc_i2c_slave_reg.h41
11 files changed, 1481 insertions, 0 deletions
diff --git a/drivers/i2c-slave/Kconfig b/drivers/i2c-slave/Kconfig
new file mode 100644
index 000000000000..89717e15e784
--- /dev/null
+++ b/drivers/i2c-slave/Kconfig
@@ -0,0 +1,39 @@
+#
+# I2C slave subsystem configuration
+#
+
+menuconfig I2C_SLAVE
+ bool "I2C Slave support"
+ depends on HAS_IOMEM
+ ---help---
+ I2C (pronounce: I-square-C) is a slow serial bus protocol used in
+ many micro controller applications and developed by Philips.
+
+ If you want I2C Slave support, you should say Y here.
+
+ This I2C Slave support can also be built as a module. If so, the module
+ will be called i2c-slave.
+
+if I2C_SLAVE
+
+config I2C_SLAVE_CORE
+ tristate "I2C SLAVE CORE"
+ default y
+ ---help---
+ i2c slave core.
+
+config MXC_I2C_SLAVE
+ tristate "MXC I2C SLAVE"
+ depends on I2C_SLAVE_CORE
+ default y
+ ---help---
+ mxc i2c slave support.
+
+config I2C_SLAVE_CLIENT
+ tristate "I2C SLAVE CLIENT"
+ default y
+ ---help---
+ i2c slave client that used when the master is on the same board.
+ this is for i2c master which is on the same board with the slave.
+
+endif # I2C_SLAVE
diff --git a/drivers/i2c-slave/Makefile b/drivers/i2c-slave/Makefile
new file mode 100644
index 000000000000..a7b08c919af9
--- /dev/null
+++ b/drivers/i2c-slave/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the i2c slave.
+#
+
+i2c_slave-objs := i2c_slave_ring_buffer.o i2c_slave_device.o i2c_slave_core.o
+obj-$(CONFIG_I2C_SLAVE_CORE) += i2c_slave.o
+obj-$(CONFIG_MXC_I2C_SLAVE) += mxc_i2c_slave.o
+obj-$(CONFIG_I2C_SLAVE_CLIENT) += i2c_slave_client.o
diff --git a/drivers/i2c-slave/i2c_slave_client.c b/drivers/i2c-slave/i2c_slave_client.c
new file mode 100644
index 000000000000..05bed361f5ca
--- /dev/null
+++ b/drivers/i2c-slave/i2c_slave_client.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/ctype.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+
+struct i2c_client *i2c_slave_client;
+static int i2c_slave_client_probe(struct i2c_client *adapter);
+static int i2c_slave_client_remove(struct i2c_client *client);
+static struct i2c_driver i2c_slave_client_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "i2c-slave-client",
+ },
+ .probe = i2c_slave_client_probe,
+ .remove = i2c_slave_client_remove,
+};
+
+/*!
+ * ov2640 I2C attach function
+ *
+ * @param adapter struct i2c_adapter *
+ * @return Error code indicating success or failure
+ */
+static int i2c_slave_client_probe(struct i2c_client *client)
+{
+ i2c_slave_client = client;
+ return 0;
+}
+
+/*!
+ * ov2640 I2C detach function
+ *
+ * @param client struct i2c_client *
+ * @return Error code indicating success or failure
+ */
+static int i2c_slave_client_remove(struct i2c_client *client)
+{
+ return 0;
+}
+
+/*!
+ * ov2640 init function
+ *
+ * @return Error code indicating success or failure
+ */
+static __init int i2c_slave_client_init(void)
+{
+ return i2c_add_driver(&i2c_slave_client_driver);
+}
+
+/*!
+ * OV2640 cleanup function
+ *
+ * @return Error code indicating success or failure
+ */
+static void __exit i2c_slave_client_clean(void)
+{
+ i2c_del_driver(&i2c_slave_client_driver);
+}
+
+module_init(i2c_slave_client_init);
+module_exit(i2c_slave_client_clean);
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("I2c Slave Client Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/i2c-slave/i2c_slave_core.c b/drivers/i2c-slave/i2c_slave_core.c
new file mode 100644
index 000000000000..4d3a21a5f45f
--- /dev/null
+++ b/drivers/i2c-slave/i2c_slave_core.c
@@ -0,0 +1,359 @@
+/*
+ * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <asm/uaccess.h>
+#include "i2c_slave_device.h"
+
+int i2c_slave_major;
+
+static ssize_t i2c_slave_read(struct file *fd, char __user *buf, size_t len,
+ loff_t *ptr)
+{
+ i2c_slave_device_t *dev;
+ void *kbuf;
+ int ret;
+
+ if (len == 0)
+ return 0;
+
+ kbuf = kmalloc(len, GFP_KERNEL);
+ if (!kbuf) {
+ ret = -ENOMEM;
+ goto error0;
+ }
+
+ dev = (i2c_slave_device_t *) fd->private_data;
+ if (!dev) {
+ ret = -ENODEV;
+ goto error1;
+ }
+
+ ret = i2c_slave_device_read(dev, len, kbuf);
+ if (ret <= 0 || copy_to_user(buf, kbuf, len)) {
+ ret = -EFAULT;
+ }
+
+ error1:
+ kfree(kbuf);
+ error0:
+ return ret;
+}
+
+static ssize_t i2c_slave_write(struct file *fd, const char __user *buf,
+ size_t len, loff_t *ptr)
+{
+ i2c_slave_device_t *dev;
+ void *kbuf;
+ int ret;
+
+ if (len == 0)
+ return 0;
+
+ kbuf = kmalloc(len, GFP_KERNEL);
+ if (!kbuf) {
+ ret = -ENOMEM;
+ goto error0;
+ }
+ if (copy_from_user(kbuf, buf, len)) {
+ ret = -EFAULT;
+ goto error1;
+ }
+
+ dev = (i2c_slave_device_t *) fd->private_data;
+ if (!dev) {
+ ret = -ENODEV;
+ goto error1;
+ }
+
+ ret = i2c_slave_device_write(dev, len, (u8 *) kbuf);
+
+ error1:
+ kfree(kbuf);
+ error0:
+ return ret;
+}
+
+static int i2c_slave_ioctl(struct inode *inode, struct file *fd,
+ unsigned code, unsigned long value)
+{
+ /*todo */
+ return 0;
+}
+
+static int i2c_slave_open(struct inode *inode, struct file *fd)
+{
+ int ret;
+ unsigned int id;
+ i2c_slave_device_t *dev;
+ id = iminor(inode);
+
+ if (id >= I2C_SLAVE_DEVICE_MAX) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ dev = i2c_slave_device_find(id);
+ if (!dev) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ i2c_slave_rb_clear(dev->receive_buffer);
+ i2c_slave_rb_clear(dev->send_buffer);
+
+ if (i2c_slave_device_start(dev)) {
+ ret = -EBUSY;
+ goto error;
+ }
+
+ fd->private_data = (void *)dev;
+ ret = 0;
+
+ error:
+ return ret;
+}
+
+static int i2c_slave_release(struct inode *inode, struct file *fd)
+{
+ int ret;
+ unsigned int id;
+ i2c_slave_device_t *dev;
+ id = iminor(inode);
+
+ if (id >= I2C_SLAVE_DEVICE_MAX) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ dev = i2c_slave_device_find(id);
+ if (!dev) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ if (i2c_slave_device_stop(dev)) {
+ ret = -EBUSY;
+ goto error;
+ }
+
+ ret = 0;
+
+ error:
+ return ret;
+}
+
+static const struct file_operations i2c_slave_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = i2c_slave_read,
+ .write = i2c_slave_write,
+ .ioctl = i2c_slave_ioctl,
+ .open = i2c_slave_open,
+ .release = i2c_slave_release,
+};
+
+static int i2c_slave_bus_match(struct device *dev, struct device_driver *drv)
+{
+ return 0;
+}
+
+/*
+static int i2c_slave_bus_probe(struct device *dev)
+{
+ struct device_driver *driver = dev->driver;
+
+ if (driver) {
+ return driver->probe(dev);
+ } else {
+ dev_err(dev, "%s: no driver\n", __func__);
+ return -ENODEV;
+ }
+}
+*/
+
+static int i2c_slave_bus_remove(struct device *dev)
+{
+ struct device_driver *driver = dev->driver;
+
+ if (driver) {
+ if (!driver->remove) {
+ return 0;
+ } else {
+ return driver->remove(dev);
+ }
+ } else {
+
+ dev_err(dev, "%s: no driver\n", __func__);
+ return -ENODEV;
+ }
+}
+
+static void i2c_slave_bus_shutdown(struct device *dev)
+{
+ struct device_driver *driver = dev->driver;
+
+ if (driver) {
+
+ driver->shutdown(dev);
+ } else {
+
+ dev_err(dev, "%s: no driver\n", __func__);
+ return;
+ }
+}
+static int i2c_slave_bus_suspend(struct device *dev, pm_message_t state)
+{
+ struct device_driver *driver = dev->driver;
+
+ if (driver) {
+
+ if (!driver->suspend) {
+ return 0;
+ } else {
+ return driver->suspend(dev, state);
+ }
+ } else {
+
+ dev_err(dev, "%s: no driver\n", __func__);
+ return -ENODEV;
+ }
+}
+
+static int i2c_slave_bus_resume(struct device *dev)
+{
+ struct device_driver *driver = dev->driver;
+
+ if (driver) {
+
+ if (!driver->resume) {
+ return 0;
+ } else {
+ return driver->resume(dev);
+ }
+ } else {
+
+ dev_err(dev, "%s: no driver\n", __func__);
+ return -ENODEV;
+ }
+}
+
+struct bus_type i2c_slave_bus_type = {
+ .name = "i2c-slave",
+ .match = i2c_slave_bus_match,
+ .remove = i2c_slave_bus_remove,
+ .shutdown = i2c_slave_bus_shutdown,
+ .suspend = i2c_slave_bus_suspend,
+ .resume = i2c_slave_bus_resume,
+};
+
+EXPORT_SYMBOL_GPL(i2c_slave_bus_type);
+
+static int i2c_slave_driver_probe(struct device *dev)
+{
+ return 0;
+}
+
+static int i2c_slave_driver_remove(struct device *dev)
+{
+ return 0;
+}
+
+static int i2c_slave_driver_shutdown(struct device *dev)
+{
+ return 0;
+}
+
+static int i2c_slave_driver_suspend(struct device *dev, pm_message_t state)
+{
+ return 0;
+}
+
+static int i2c_slave_driver_resume(struct device *dev)
+{
+ return 0;
+}
+
+extern struct class *i2c_slave_class;
+
+static struct device_driver i2c_slave_driver = {
+ .name = "i2c-slave",
+ .owner = THIS_MODULE,
+ .bus = &i2c_slave_bus_type,
+ .probe = i2c_slave_driver_probe,
+ .remove = i2c_slave_driver_remove,
+ .shutdown = i2c_slave_driver_shutdown,
+ .suspend = i2c_slave_driver_suspend,
+ .resume = i2c_slave_driver_resume,
+};
+
+static int __init i2c_slave_dev_init(void)
+{
+ int ret;
+
+ printk(KERN_INFO "i2c slave /dev entries driver\n");
+
+ ret = bus_register(&i2c_slave_bus_type);
+ if (ret) {
+ printk(KERN_ERR "%s: bus_register error\n", __func__);
+ goto out;
+ }
+
+ i2c_slave_class = class_create(THIS_MODULE, "i2c-slave");
+ if (IS_ERR(i2c_slave_class)) {
+ pr_err("%s: class_create error\n", __func__);
+ goto out_unreg_bus;
+ }
+
+ i2c_slave_major = register_chrdev(0, "i2c-slave", &i2c_slave_fops);
+ if (i2c_slave_major <= 0) {
+ pr_err("%s: register_chrdev error\n", __func__);
+ goto out_unreg_class;
+ }
+
+ ret = driver_register(&i2c_slave_driver);
+ if (ret) {
+ pr_err("%s: driver_register error\n", __func__);
+ goto out_unreg_chrdev;
+ }
+
+ return 0;
+
+ out_unreg_chrdev:
+ unregister_chrdev(i2c_slave_major, "i2c-slave");
+ out_unreg_class:
+ class_destroy(i2c_slave_class);
+ out_unreg_bus:
+ bus_unregister(&i2c_slave_bus_type);
+ out:
+ pr_err("%s: init error\n", __func__);
+ return ret;
+}
+
+static void __exit i2c_dev_exit(void)
+{
+ driver_unregister(&i2c_slave_driver);
+ class_destroy(i2c_slave_class);
+ unregister_chrdev(i2c_slave_major, "i2c-slave");
+ bus_unregister(&i2c_slave_bus_type);
+}
+
+module_init(i2c_slave_dev_init);
+module_exit(i2c_dev_exit);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("I2C Slave Driver Core");
+MODULE_LICENSE("GPL");
diff --git a/drivers/i2c-slave/i2c_slave_device.c b/drivers/i2c-slave/i2c_slave_device.c
new file mode 100644
index 000000000000..1968a00aa693
--- /dev/null
+++ b/drivers/i2c-slave/i2c_slave_device.c
@@ -0,0 +1,271 @@
+/*
+ * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/slab.h>
+#include <linux/major.h>
+#include <linux/mm.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/kdev_t.h>
+#include "i2c_slave_device.h"
+static i2c_slave_device_t *i2c_slave_devices[I2C_SLAVE_DEVICE_MAX];
+struct class *i2c_slave_class;
+static int i2c_slave_device_get_id(void)
+{
+ int i;
+ for (i = 0; i < I2C_SLAVE_DEVICE_MAX; i++) {
+ if (!i2c_slave_devices[i])
+ return i;
+ }
+ return -1;
+}
+
+i2c_slave_device_t *i2c_slave_device_find(int id)
+{
+ if (id >= 0 && id < I2C_SLAVE_DEVICE_MAX)
+ return i2c_slave_devices[id];
+
+ else
+ return NULL;
+}
+void i2c_slave_device_set_name(i2c_slave_device_t *device, char *name)
+{
+ device->name = name;
+}
+
+void i2c_slave_device_set_address(i2c_slave_device_t *device, u8 address)
+{
+ device->address = address;
+}
+
+u8 i2c_slave_device_get_addr(i2c_slave_device_t *device)
+{
+ return device->address;
+}
+
+int i2c_slave_device_set_freq(i2c_slave_device_t *device, u32 freq)
+{
+ /*TODO: freq check */
+ device->scl_freq = freq;
+ return 0;
+}
+
+u32 i2c_slave_device_get_freq(i2c_slave_device_t *device)
+{
+ return device->scl_freq;
+}
+
+/*used by the specific i2c device to register itself to the core.*/
+i2c_slave_device_t *i2c_slave_device_alloc(void)
+{
+ int id;
+ i2c_slave_device_t *device;
+ id = i2c_slave_device_get_id();
+ if (id < 0) {
+ goto error;
+ }
+ device =
+ (i2c_slave_device_t *) kzalloc(sizeof(i2c_slave_device_t),
+ GFP_KERNEL);
+ if (!device) {
+ printk(KERN_ERR "%s: alloc device error\n", __func__);
+ goto error_device;
+ }
+ device->receive_buffer = i2c_slave_rb_alloc(PAGE_SIZE);
+ if (!device->receive_buffer) {
+ printk(KERN_ERR "%s: alloc receive buffer error\n", __func__);
+ goto error_receive_buffer;
+ }
+ device->send_buffer = i2c_slave_rb_alloc(PAGE_SIZE);
+ if (!device->send_buffer) {
+ printk(KERN_ERR "%s: alloc send buffer error\n", __func__);
+ goto error_send_buffer;
+ }
+ device->id = id;
+ return device;
+
+ error_send_buffer:
+ kfree(device->receive_buffer);
+ error_receive_buffer:
+ kfree((void *)device);
+ error_device:
+ pr_debug(KERN_ERR "%s: no memory\n", __func__);
+ error:
+ return 0;
+}
+
+void i2c_slave_device_free(i2c_slave_device_t *dev)
+{
+ i2c_slave_rb_release(dev->receive_buffer);
+ i2c_slave_rb_release(dev->send_buffer);
+ kfree(dev);
+}
+
+int i2c_slave_device_register(i2c_slave_device_t *device)
+{
+ device->dev = device_create(i2c_slave_class, NULL,
+ MKDEV(i2c_slave_major, device->id),
+ NULL, "slave-i2c-%d", device->id);
+ if (!device->dev) {
+ return -1;
+ }
+ i2c_slave_devices[device->id] = device;
+ return 0;
+}
+
+void i2c_slave_device_unregister(i2c_slave_device_t *device)
+{
+ device_destroy(i2c_slave_class, MKDEV(i2c_slave_major, device->id));
+ i2c_slave_devices[device->id] = 0;
+ i2c_slave_device_free(device);
+}
+
+/*
+ this two functions are used by i2c slave core to start or stop the specific i2c device.
+*/
+int i2c_slave_device_start(i2c_slave_device_t *device)
+{
+ return device->start(device);
+}
+
+int i2c_slave_device_stop(i2c_slave_device_t *device)
+{
+ return device->stop(device);
+}
+
+/*
+ this two functions are used by i2c slave core to get data by the specific i2c slave device
+ or send data to it to feed i2c master's need.
+
+ @mod: async(1) or sync(0) mode.
+*/
+int i2c_slave_device_read(i2c_slave_device_t *device, int num, u8 *data)
+{
+ int read_num, read_total = 0;
+ int step = 1000;
+ u8 *read_buf = data;
+ printk(KERN_INFO "%s: device id=%d, num=%d\n", __func__, device->id,
+ num);
+ read_num = i2c_slave_rb_consume(device->receive_buffer, num, read_buf);
+ read_total += read_num;
+ read_buf += read_num;
+ step--;
+ while ((read_total < num) && step) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ / 10);
+ if (!signal_pending(current)) {
+ } else {
+ /*TODO*/ break;
+ }
+ read_num =
+ i2c_slave_rb_consume(device->receive_buffer,
+ num - read_total, read_buf);
+ num -= read_num;
+ read_buf += read_num;
+ step--;
+ }
+ return read_total;
+}
+int i2c_slave_device_write(i2c_slave_device_t *device, int num, u8 *data)
+{
+ int write_num, write_total = 0;
+ int step = 1000;
+ u8 *buf_index = data;
+ write_num = i2c_slave_rb_produce(device->send_buffer, num, buf_index);
+ write_total += write_num;
+ buf_index += write_num;
+ step--;
+ while (write_total < num && step) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ / 10);
+ if (!signal_pending(current)) {
+ } else {
+ /*TODO*/ step = 0;
+ break;
+ }
+ write_num =
+ i2c_slave_rb_produce(device->send_buffer, num - write_total,
+ buf_index);
+ write_total += write_num;
+ buf_index += write_num;
+ step--;
+ }
+ while (step && i2c_slave_rb_num(device->send_buffer)) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ / 10);
+ if (!signal_pending(current)) {
+ step--;
+ } else {
+ /*TODO*/ step = 0;
+ break;
+ }
+ }
+ if (!step) {
+ write_total -= i2c_slave_rb_num(device->send_buffer);
+ i2c_slave_rb_clear(device->send_buffer);
+ }
+ return write_total;
+}
+
+/*
+ * this 2 functions used by the specific i2c slave device when they got data from master(produce),
+ * or is request by master(consume).
+ */
+int i2c_slave_device_produce(i2c_slave_device_t *device, int num, u8 *data)
+{
+ int ret;
+ ret = i2c_slave_rb_produce(device->receive_buffer, num, data);
+ return ret;
+}
+int i2c_slave_device_consume(i2c_slave_device_t *device, int num, u8 *data)
+{
+ return i2c_slave_rb_consume(device->send_buffer, num, data);
+}
+
+EXPORT_SYMBOL(i2c_slave_device_set_name);
+EXPORT_SYMBOL(i2c_slave_device_set_address);
+EXPORT_SYMBOL(i2c_slave_device_get_addr);
+EXPORT_SYMBOL(i2c_slave_device_find);
+EXPORT_SYMBOL(i2c_slave_device_set_freq);
+EXPORT_SYMBOL(i2c_slave_device_get_freq);
+
+/*
+* used by the specific i2c device to register itself to the core.
+*/
+EXPORT_SYMBOL(i2c_slave_device_alloc);
+EXPORT_SYMBOL(i2c_slave_device_free);
+EXPORT_SYMBOL(i2c_slave_device_register);
+EXPORT_SYMBOL(i2c_slave_device_unregister);
+
+/*
+ this two functions are used by i2c slave core to start or stop the specific i2c device.
+*/
+EXPORT_SYMBOL(i2c_slave_device_start);
+EXPORT_SYMBOL(i2c_slave_device_stop);
+
+/*
+ this two functions are used by i2c slave core to get data by the specific i2c slave device
+ or send data to it for it to feed i2c master's need.
+
+ @mod: async(1) or sync(0) mode.
+*/
+EXPORT_SYMBOL(i2c_slave_device_read);
+EXPORT_SYMBOL(i2c_slave_device_write);
+
+/*
+* this 2 functions used by the specific i2c slave device when they got data from master,
+* or is request by master.
+*/
+EXPORT_SYMBOL(i2c_slave_device_produce);
+EXPORT_SYMBOL(i2c_slave_device_consume);
diff --git a/drivers/i2c-slave/i2c_slave_device.h b/drivers/i2c-slave/i2c_slave_device.h
new file mode 100644
index 000000000000..472782cd230d
--- /dev/null
+++ b/drivers/i2c-slave/i2c_slave_device.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __I2C_SLAVE_H__
+#define __I2C_SLAVE_H__
+
+#include <linux/list.h>
+#include "i2c_slave_ring_buffer.h"
+
+#define I2C_SLAVE_DEVICE_MAX 256
+extern int i2c_slave_major;
+
+typedef struct i2c_slave_device {
+ struct list_head list;
+ u8 address;
+ u32 scl_freq;
+ char *name;
+ i2c_slave_ring_buffer_t *receive_buffer;
+ i2c_slave_ring_buffer_t *send_buffer;
+ int (*start) (struct i2c_slave_device *);
+ int (*stop) (struct i2c_slave_device *);
+ /*int (*set_freq)(struct i2c_slave_device*);
+ int (*set_addr)(struct i2c_slave_device*);*/
+ void *private_data;
+ struct device *dev;
+ int id;
+} i2c_slave_device_t;
+
+/*
+ used by the specific device to set some infomations.
+*/
+void i2c_slave_device_set_name(i2c_slave_device_t *device, char *name);
+void i2c_slave_device_set_address(i2c_slave_device_t *device, u8 address);
+i2c_slave_device_t *i2c_slave_device_find(int id);
+u8 i2c_slave_device_get_addr(i2c_slave_device_t *device);
+int i2c_slave_device_set_freq(i2c_slave_device_t *device, u32 freq);
+u32 i2c_slave_device_get_freq(i2c_slave_device_t *device);
+
+/*
+**used by the specific i2c device to register itself to the core.
+*/
+i2c_slave_device_t *i2c_slave_device_alloc(void);
+void i2c_slave_device_free(i2c_slave_device_t *);
+int i2c_slave_device_register(i2c_slave_device_t *device);
+void i2c_slave_device_unregister(i2c_slave_device_t *device);
+
+/*
+ this two functions are used by i2c slave core to start or stop the specific i2c device.
+*/
+int i2c_slave_device_start(i2c_slave_device_t *device);
+int i2c_slave_device_stop(i2c_slave_device_t *device);
+
+/*
+ this two functions are used by i2c slave core to get data by the specific i2c slave device
+ or send data to it for it to feed i2c master's need.
+
+ @mod: async(1) or sync(0) mode.
+*/
+int i2c_slave_device_read(i2c_slave_device_t *device, int num, u8 *data);
+int i2c_slave_device_write(i2c_slave_device_t *device, int num, u8 *data);
+
+/*
+*this 2 functions used by the specific i2c slave device when they got data from master,
+*or is requested by master.
+*/
+int i2c_slave_device_produce(i2c_slave_device_t *device, int num, u8 *data);
+int i2c_slave_device_consume(i2c_slave_device_t *device, int num, u8 *data);
+
+#endif
diff --git a/drivers/i2c-slave/i2c_slave_ring_buffer.c b/drivers/i2c-slave/i2c_slave_ring_buffer.c
new file mode 100644
index 000000000000..2f7be580c197
--- /dev/null
+++ b/drivers/i2c-slave/i2c_slave_ring_buffer.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#include <linux/slab.h>
+#include <linux/hardirq.h>
+#include "i2c_slave_ring_buffer.h"
+
+i2c_slave_ring_buffer_t *i2c_slave_rb_alloc(int size)
+{
+ i2c_slave_ring_buffer_t *ring_buf;
+
+ ring_buf =
+ (i2c_slave_ring_buffer_t *) kzalloc(sizeof(i2c_slave_ring_buffer_t),
+ GFP_KERNEL);
+ if (!ring_buf) {
+ pr_debug("%s: alloc ring_buf error\n", __func__);
+ goto error;
+ }
+
+ ring_buf->buffer = kmalloc(size, GFP_KERNEL);
+ if (!ring_buf->buffer) {
+ pr_debug("%s: alloc buffer error\n", __func__);
+ goto error1;
+ }
+
+ ring_buf->total = size;
+
+ ring_buf->lock = __SPIN_LOCK_UNLOCKED(ring_buf->lock);
+ return ring_buf;
+
+ error1:
+ kfree(ring_buf);
+ error:
+ return NULL;
+}
+
+void i2c_slave_rb_release(i2c_slave_ring_buffer_t *ring)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(ring->lock, flags);
+ kfree(ring->buffer);
+ spin_unlock_irqrestore(ring->lock, flags);
+ kfree(ring);
+}
+
+int i2c_slave_rb_produce(i2c_slave_ring_buffer_t *ring, int num, char *data)
+{
+ int ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(ring->lock, flags);
+
+ if (ring->start < ring->end) {
+ if ((ring->start + num) < ring->end) { /*have enough space */
+ memcpy(&ring->buffer[ring->start], data, num);
+ ring->start += num;
+ ret = num;
+ } else { /*space not enough, just copy part of it. */
+ ret = ring->end - ring->start;
+ memcpy(&ring->buffer[ring->start], data, ret);
+ ring->start += ret;
+ ring->full = 1;
+ }
+ } else if (ring->start >= ring->end && !ring->full) {
+ if (ring->start + num <= ring->total) { /*space enough */
+ ret = num;
+ memcpy(&ring->buffer[ring->start], data, ret);
+ ring->start += ret;
+ } else { /*turn ring->start around */
+ ret = ring->total - ring->start;
+ memcpy(&ring->buffer[ring->start], data, ret);
+ ring->start = 0;
+ num -= ret;
+ data += ret;
+ if (num < ring->end) { /*space enough */
+ ret += num;
+ memcpy(&ring->buffer[ring->start], data, num);
+ } else { /*space not enough, just copy part of it. */
+ ret += ring->end;
+ memcpy(&ring->buffer[ring->start], data,
+ ring->end);
+ ring->start = ring->end;
+ ring->full = 1;
+ }
+ }
+ } else { /*(ring->data == ring->end) && ring->full ) : full */
+ ret = 0;
+ }
+
+ spin_unlock_irqrestore(ring->lock, flags);
+ return ret;
+}
+
+int i2c_slave_rb_consume(i2c_slave_ring_buffer_t *ring, int num, char *data)
+{
+ int ret;
+ unsigned long flags;
+ spin_lock_irqsave(ring->lock, flags);
+ if (num <= 0) {
+ ret = 0;
+ goto out;
+ }
+
+ if (ring->start > ring->end) {
+ if (num <= ring->start - ring->end) { /*enough */
+ ret = num;
+ memcpy(data, &ring->buffer[ring->end], ret);
+ ring->end += ret;
+ } else { /*not enough */
+ ret = ring->start - ring->end;
+ memcpy(data, &ring->buffer[ring->end], ret);
+ ring->end += ret;
+ }
+ } else if (ring->start < ring->end || ring->full) {
+ if (num <= ring->total - ring->end) {
+ ret = ring->total - ring->end;
+ memcpy(data, &ring->buffer[ring->end], ret);
+ ring->end += ret;
+ } else if (num <= ring->total - ring->end + ring->start) {
+ ret = ring->total - ring->end;
+ memcpy(data, &ring->buffer[ring->end], ret);
+ ring->end = 0;
+ data += ret;
+ num -= ret;
+ memcpy(data, &ring->buffer[ring->end], num);
+ ring->end = num;
+ ret += num;
+ } else {
+ ret = ring->total - ring->end;
+ memcpy(data, &ring->buffer[ring->end], ret);
+ ring->end = 0;
+ data += ret;
+ num -= ret;
+ memcpy(data, &ring->buffer[ring->end], ring->start);
+ ring->end = ring->start;
+ ret += ring->start;
+ }
+ ring->full = 0;
+ } else { /*empty */
+ ret = 0;
+ }
+
+ out:
+ spin_unlock_irqrestore(ring->lock, flags);
+
+ return ret;
+}
+
+int i2c_slave_rb_num(i2c_slave_ring_buffer_t *ring)
+{
+ int ret;
+ unsigned long flags;
+ spin_lock_irqsave(ring->lock, flags);
+ if (ring->start > ring->end) {
+ ret = ring->start - ring->end;
+ } else if (ring->start < ring->end) {
+ ret = ring->total - ring->end + ring->start;
+ } else if (ring->full) {
+ ret = ring->total;
+ } else {
+ ret = 0;
+ }
+ spin_unlock_irqrestore(ring->lock, flags);
+ return ret;
+}
+
+void i2c_slave_rb_clear(i2c_slave_ring_buffer_t *ring)
+{
+ unsigned long flags;
+ spin_lock_irqsave(ring->lock, flags);
+
+ ring->start = ring->end = 0;
+ ring->full = 0;
+ spin_unlock_irqrestore(ring->lock, flags);
+}
diff --git a/drivers/i2c-slave/i2c_slave_ring_buffer.h b/drivers/i2c-slave/i2c_slave_ring_buffer.h
new file mode 100644
index 000000000000..32fc21b618ed
--- /dev/null
+++ b/drivers/i2c-slave/i2c_slave_ring_buffer.h
@@ -0,0 +1,39 @@
+#ifndef __BUFFER_MANAGER_H__
+#define __BUFFER_MANAGER_H__
+/*
+ * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#include <linux/types.h>
+#include <linux/spinlock.h>
+
+typedef struct i2c_slave_ring_buffer {
+ int start;
+ int end;
+ int total;
+ bool full;
+ char *buffer;
+ spinlock_t lock;
+} i2c_slave_ring_buffer_t;
+
+i2c_slave_ring_buffer_t *i2c_slave_rb_alloc(int size);
+
+void i2c_slave_rb_release(i2c_slave_ring_buffer_t *ring);
+
+int i2c_slave_rb_produce(i2c_slave_ring_buffer_t *ring, int num, char *data);
+
+int i2c_slave_rb_consume(i2c_slave_ring_buffer_t *ring, int num, char *data);
+
+int i2c_slave_rb_num(i2c_slave_ring_buffer_t *ring);
+
+void i2c_slave_rb_clear(i2c_slave_ring_buffer_t *ring);
+
+#endif
diff --git a/drivers/i2c-slave/mxc_i2c_slave.c b/drivers/i2c-slave/mxc_i2c_slave.c
new file mode 100644
index 000000000000..347c015afd22
--- /dev/null
+++ b/drivers/i2c-slave/mxc_i2c_slave.c
@@ -0,0 +1,335 @@
+/*
+ * Copyright (C) 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/slab.h>
+#include <asm/io.h>
+#include <linux/pm.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include "i2c_slave_device.h"
+#include "mxc_i2c_slave.h"
+#include "mxc_i2c_slave_reg.h"
+
+struct mxc_i2c_slave_clk {
+ int reg_value;
+ int div;
+};
+
+static const struct mxc_i2c_slave_clk i2c_clk_table[] = {
+ {0x20, 22}, {0x21, 24}, {0x22, 26}, {0x23, 28},
+ {0, 30}, {1, 32}, {0x24, 32}, {2, 36},
+ {0x25, 36}, {0x26, 40}, {3, 42}, {0x27, 44},
+ {4, 48}, {0x28, 48}, {5, 52}, {0x29, 56},
+ {6, 60}, {0x2A, 64}, {7, 72}, {0x2B, 72},
+ {8, 80}, {0x2C, 80}, {9, 88}, {0x2D, 96},
+ {0xA, 104}, {0x2E, 112}, {0xB, 128}, {0x2F, 128},
+ {0xC, 144}, {0xD, 160}, {0x30, 160}, {0xE, 192},
+ {0x31, 192}, {0x32, 224}, {0xF, 240}, {0x33, 256},
+ {0x10, 288}, {0x11, 320}, {0x34, 320}, {0x12, 384},
+ {0x35, 384}, {0x36, 448}, {0x13, 480}, {0x37, 512},
+ {0x14, 576}, {0x15, 640}, {0x38, 640}, {0x16, 768},
+ {0x39, 768}, {0x3A, 896}, {0x17, 960}, {0x3B, 1024},
+ {0x18, 1152}, {0x19, 1280}, {0x3C, 1280}, {0x1A, 1536},
+ {0x3D, 1536}, {0x3E, 1792}, {0x1B, 1920}, {0x3F, 2048},
+ {0x1C, 2304}, {0x1D, 2560}, {0x1E, 3072}, {0x1F, 3840},
+ {0, 0}
+};
+
+extern void gpio_i2c_active(int i2c_num);
+extern void gpio_i2c_inactive(int i2c_num);
+
+static irqreturn_t interrupt_handler(int irq, void *dev_id)
+{
+ u16 status, ctl;
+ int num;
+ u16 data;
+ struct mxc_i2c_slave_device *mxc_i2c =
+ (struct mxc_i2c_slave_device *)dev_id;
+
+ status = readw(mxc_i2c->reg_base + MXC_I2SR);
+ ctl = readw(mxc_i2c->reg_base + MXC_I2CR);
+
+ dev_dbg(mxc_i2c->dev->dev, "status=%x, ctl=%x\n", status, ctl);
+
+ if (status & MXC_I2SR_IAAS) {
+ if (status & MXC_I2SR_SRW) {
+ /*slave send */
+ num =
+ i2c_slave_device_consume(mxc_i2c->dev, 1,
+ (u8 *) &data);
+ if (num < 1) {
+ /*FIXME:not ready to send data */
+ printk(KERN_ERR
+ " i2c-slave:%s:data not ready\n",
+ __func__);
+ } else {
+ ctl |= MXC_I2CR_MTX;
+ writew(ctl, mxc_i2c->reg_base + MXC_I2CR);
+ /*send data */
+ writew(data, mxc_i2c->reg_base + MXC_I2DR);
+ }
+
+ } else {
+ /*slave receive */
+ ctl &= ~MXC_I2CR_MTX;
+ writew(ctl, mxc_i2c->reg_base + MXC_I2CR);
+
+ /*dummy read */
+ data = readw(mxc_i2c->reg_base + MXC_I2DR);
+ }
+ } else {
+ /*slave send */
+ if (ctl & MXC_I2CR_MTX) {
+ if (!(status & MXC_I2SR_RXAK)) { /*ACK received */
+ num =
+ i2c_slave_device_consume(mxc_i2c->dev, 1,
+ (u8 *) &data);
+ if (num < 1) {
+ /*FIXME:not ready to send data */
+ printk(KERN_ERR
+ " i2c-slave:%s:data not ready\n",
+ __func__);
+ } else {
+ ctl |= MXC_I2CR_MTX;
+ writew(ctl,
+ mxc_i2c->reg_base + MXC_I2CR);
+ writew(data,
+ mxc_i2c->reg_base + MXC_I2DR);
+ }
+ } else {
+ /*no ACK. */
+ /*dummy read */
+ ctl &= ~MXC_I2CR_MTX;
+ writew(ctl, mxc_i2c->reg_base + MXC_I2CR);
+ data = readw(mxc_i2c->reg_base + MXC_I2DR);
+ }
+ } else { /*read */
+ ctl &= ~MXC_I2CR_MTX;
+ writew(ctl, mxc_i2c->reg_base + MXC_I2CR);
+
+ /*read */
+ data = readw(mxc_i2c->reg_base + MXC_I2DR);
+ i2c_slave_device_produce(mxc_i2c->dev, 1,
+ (u8 *) &data);
+ }
+
+ }
+
+ writew(0x0, mxc_i2c->reg_base + MXC_I2SR);
+
+ return IRQ_HANDLED;
+}
+
+static int start(i2c_slave_device_t *device)
+{
+ volatile unsigned int cr;
+ unsigned int addr;
+ struct mxc_i2c_slave_device *mxc_dev;
+
+ mxc_dev = (struct mxc_i2c_slave_device *)device->private_data;
+ if (!mxc_dev) {
+ dev_err(device->dev, "%s: get mxc_dev error\n", __func__);
+ return -ENODEV;
+ }
+
+ clk_enable(mxc_dev->clk);
+ /* Set the frequency divider */
+ writew(mxc_dev->clkdiv, mxc_dev->reg_base + MXC_IFDR);
+
+ /* Set the Slave bit */
+ cr = readw(mxc_dev->reg_base + MXC_I2CR);
+ cr &= (!MXC_I2CR_MSTA);
+ writew(cr, mxc_dev->reg_base + MXC_I2CR);
+
+ /*Set Slave Address */
+ addr = mxc_dev->dev->address << 1;
+ writew(addr, mxc_dev->reg_base + MXC_IADR);
+
+ /* Clear the status register */
+ writew(0x0, mxc_dev->reg_base + MXC_I2SR);
+
+ /* Enable I2C and its interrupts */
+ writew(MXC_I2CR_IEN, mxc_dev->reg_base + MXC_I2CR);
+ writew(MXC_I2CR_IEN | MXC_I2CR_IIEN, mxc_dev->reg_base + MXC_I2CR);
+
+ return 0;
+
+}
+
+static int stop(i2c_slave_device_t *device)
+{
+ struct mxc_i2c_slave_device *mxc_dev;
+
+ mxc_dev = (struct mxc_i2c_slave_device *)device->private_data;
+
+ writew(0x0, mxc_dev->reg_base + MXC_I2CR);
+ clk_disable(mxc_dev->clk);
+
+ return 0;
+}
+
+static int mxc_i2c_slave_probe(struct platform_device *pdev)
+{
+ int i;
+ u32 clk_freq;
+ struct resource *res;
+ struct mxc_i2c_slave_device *mxc_dev;
+
+ mxc_dev = kzalloc(sizeof(struct mxc_i2c_slave_device), GFP_KERNEL);
+ if (!mxc_dev) {
+ goto error0;
+ }
+ mxc_dev->dev = i2c_slave_device_alloc();
+ if (mxc_dev->dev == 0) {
+ dev_err(&pdev->dev, "%s: i2c_slave_device_alloc error\n",
+ __func__);
+ goto error1;
+ }
+
+ i2c_slave_device_set_address(mxc_dev->dev, MXC_I2C_SLAVE_ADDRESS);
+ i2c_slave_device_set_freq(mxc_dev->dev, MXC_I2C_SLAVE_FREQ);
+ i2c_slave_device_set_name(mxc_dev->dev, MXC_I2C_SLAVE_NAME);
+ mxc_dev->dev->start = start;
+ mxc_dev->dev->stop = stop;
+
+ mxc_dev->dev->private_data = mxc_dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "%s: get resource error\n", __func__);
+ goto error2;
+ }
+ mxc_dev->reg_base = ioremap(res->start, res->end - res->start + 1);
+
+ mxc_dev->irq = platform_get_irq(pdev, 0);
+ if (mxc_dev->irq < 0) {
+ dev_err(&pdev->dev, "%s: get irq error\n", __func__);
+ goto error3;
+ }
+ if (request_irq(mxc_dev->irq, interrupt_handler,
+ 0, mxc_dev->dev->name, mxc_dev) < 0) {
+ dev_err(&pdev->dev, "%s: request_irq error\n", __func__);
+ goto error3;
+ }
+
+ /*i2c id on soc */
+ mxc_dev->id = pdev->id;
+
+ gpio_i2c_active(mxc_dev->id);
+
+ /*clock */
+ mxc_dev->clk = clk_get(&pdev->dev, "i2c_clk");
+ clk_freq = clk_get_rate(mxc_dev->clk);
+ mxc_dev->clkdiv = -1;
+ if (mxc_dev->dev->scl_freq) {
+ /* Calculate divider and round up any fractional part */
+ int div = (clk_freq + mxc_dev->dev->scl_freq - 1) /
+ mxc_dev->dev->scl_freq;
+ for (i = 0; i2c_clk_table[i].div != 0; i++) {
+ if (i2c_clk_table[i].div >= div) {
+ mxc_dev->clkdiv = i2c_clk_table[i].reg_value;
+ break;
+ }
+ }
+ }
+ if (mxc_dev->clkdiv == -1) {
+ i--;
+ mxc_dev->clkdiv = 0x1F; /* Use max divider */
+ }
+ dev_dbg(&pdev->dev,
+ "i2c slave speed is %d/%d = %d bps, reg val = 0x%02X\n",
+ clk_freq, i2c_clk_table[i].div, clk_freq / i2c_clk_table[i].div,
+ mxc_dev->clkdiv);
+
+ if (i2c_slave_device_register(mxc_dev->dev) < 0) {
+ dev_err(&pdev->dev, "%s: i2c_slave_device_register error\n",
+ __func__);
+ goto error4;
+ }
+
+ platform_set_drvdata(pdev, (void *)mxc_dev);
+
+ /*start(mxc_dev->dev); */
+ return 0;
+
+ error4:
+ free_irq(mxc_dev->irq, mxc_dev);
+ error3:
+ iounmap(mxc_dev->reg_base);
+ error2:
+ i2c_slave_device_free(mxc_dev->dev);
+ error1:
+ kfree(mxc_dev);
+ error0:
+ return -ENODEV;
+}
+
+static int mxc_i2c_slave_remove(struct platform_device *pdev)
+{
+ struct mxc_i2c_slave_device *mxc_dev;
+ mxc_dev = (struct mxc_i2c_slave_device *)platform_get_drvdata(pdev);
+
+ i2c_slave_device_unregister(mxc_dev->dev);
+ free_irq(mxc_dev->irq, mxc_dev);
+ iounmap(mxc_dev->reg_base);
+ kfree((void *)mxc_dev);
+
+ return 0;
+}
+
+static int mxc_i2c_slave_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ return 0;
+}
+
+static int mxc_i2c_slave_resume(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static struct platform_driver mxci2c_slave_driver = {
+ .driver = {
+ .name = "mxc_i2c_slave",
+ .owner = THIS_MODULE,
+ },
+ .probe = mxc_i2c_slave_probe,
+ .remove = mxc_i2c_slave_remove,
+ .suspend = mxc_i2c_slave_suspend,
+ .resume = mxc_i2c_slave_resume,
+};
+
+static int __init mxc_i2c_slave_init(void)
+{
+ /* Register the device driver structure. */
+ return platform_driver_register(&mxci2c_slave_driver);
+}
+
+/*!
+ * This function is used to cleanup all resources before the driver exits.
+ */
+static void __exit mxc_i2c_slave_exit(void)
+{
+ platform_driver_unregister(&mxci2c_slave_driver);
+}
+
+module_init(mxc_i2c_slave_init);
+module_exit(mxc_i2c_slave_exit);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("MXC I2C Slave Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/i2c-slave/mxc_i2c_slave.h b/drivers/i2c-slave/mxc_i2c_slave.h
new file mode 100644
index 000000000000..b3045dc4a2c5
--- /dev/null
+++ b/drivers/i2c-slave/mxc_i2c_slave.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __MXC_I2C_SLAVE_H__
+#define __MXC_I2C_SLAVE_H__
+
+#include <linux/clk.h>
+#include "i2c_slave_device.h"
+
+#define MXC_I2C_SLAVE_NAME "MXC_I2C_SLAVE"
+#define MXC_I2C_SLAVE_ADDRESS 0x55
+#define MXC_I2C_SLAVE_FREQ (1000*100)
+
+struct mxc_i2c_slave_device {
+ /*!
+ * The default clock divider value to be used.
+ */
+ unsigned int clkdiv;
+
+ /*!
+ * The clock source for the device.
+ */
+ struct clk *clk;
+
+ /*i2c id on soc */
+ int id;
+
+ int irq;
+ unsigned long reg_base;
+ bool state; /*0:stop, 1:start */
+ i2c_slave_device_t *dev;
+};
+
+#endif
diff --git a/drivers/i2c-slave/mxc_i2c_slave_reg.h b/drivers/i2c-slave/mxc_i2c_slave_reg.h
new file mode 100644
index 000000000000..52a04e06f810
--- /dev/null
+++ b/drivers/i2c-slave/mxc_i2c_slave_reg.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __MXC_I2C_SLAVE_REG_H__
+#define __MXC_I2C_SLAVE_REG_H__
+
+/* Address offsets of the I2C registers */
+#define MXC_IADR 0x00 /* Address Register */
+#define MXC_IFDR 0x04 /* Freq div register */
+#define MXC_I2CR 0x08 /* Control regsiter */
+#define MXC_I2SR 0x0C /* Status register */
+#define MXC_I2DR 0x10 /* Data I/O register */
+
+/* Bit definitions of I2CR */
+#define MXC_I2CR_IEN 0x0080
+#define MXC_I2CR_IIEN 0x0040
+#define MXC_I2CR_MSTA 0x0020
+#define MXC_I2CR_MTX 0x0010
+#define MXC_I2CR_TXAK 0x0008
+#define MXC_I2CR_RSTA 0x0004
+
+/* Bit definitions of I2SR */
+#define MXC_I2SR_ICF 0x0080
+#define MXC_I2SR_IAAS 0x0040
+#define MXC_I2SR_IBB 0x0020
+#define MXC_I2SR_IAL 0x0010
+#define MXC_I2SR_SRW 0x0004
+#define MXC_I2SR_IIF 0x0002
+#define MXC_I2SR_RXAK 0x0001
+
+#endif /* __MXC_I2C_REG_H__ */
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-03 02:55:21 +0000