--- /dev/null
+/* drivers/misc/akm8963.c - akm8963 compass driver
+ *
+ * Copyright (C) 2007-2008 HTC Corporation.
+ * Author: Hou-Kun Chen <houkun.chen@gmail.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/*#define DEBUG*/
+/*#define VERBOSE_DEBUG*/
+
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/irq.h>
+#include <linux/miscdevice.h>
+#include <linux/gpio.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/workqueue.h>
+#include <linux/freezer.h>
+#include <linux/akm8963.h>
+
+#define AKM8963_DEBUG_IF 0
+#define AKM8963_DEBUG_DATA 0
+
+#define AKM_ACCEL_ITEMS 3
+/* Wait timeout in millisecond */
+#define AKM8963_DRDY_TIMEOUT 100
+
+struct akm8963_data {
+ struct i2c_client *i2c;
+ struct input_dev *input;
+ struct device *class_dev;
+ struct class *compass;
+ struct delayed_work work;
+
+ wait_queue_head_t drdy_wq;
+ wait_queue_head_t open_wq;
+
+ struct mutex sensor_mutex;
+ int8_t sense_data[SENSOR_DATA_SIZE];
+ struct mutex accel_mutex;
+ int16_t accel_data[AKM_ACCEL_ITEMS];
+
+ struct mutex val_mutex;
+ uint32_t enable_flag;
+ int64_t delay[AKM_NUM_SENSORS];
+
+ atomic_t active;
+ atomic_t is_busy;
+ atomic_t drdy;
+ atomic_t suspend;
+
+ char layout;
+ char outbit;
+ int irq;
+ int rstn;
+};
+
+static struct akm8963_data *s_akm;
+
+
+
+/***** I2C I/O function ***********************************************/
+static int akm8963_i2c_rxdata(
+ struct i2c_client *i2c,
+ unsigned char *rxData,
+ int length)
+{
+ struct i2c_msg msgs[] = {
+ {
+ .addr = i2c->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = rxData,
+ .scl_rate = 200*1000,
+ },
+ {
+ .addr = i2c->addr,
+ .flags = I2C_M_RD,
+ .len = length,
+ .buf = rxData,
+ .scl_rate = 200*1000,
+ }, };
+ unsigned char addr = rxData[0];
+
+ if (i2c_transfer(i2c->adapter, msgs, 2) < 0) {
+ dev_err(&i2c->dev, "%s: transfer failed.", __func__);
+ return -EIO;
+ }
+
+ dev_vdbg(&i2c->dev, "RxData: len=%02x, addr=%02x, data=%02x",
+ length, addr, rxData[0]);
+ return 0;
+}
+
+static int akm8963_i2c_txdata(
+ struct i2c_client *i2c,
+ unsigned char *txData,
+ int length)
+{
+ struct i2c_msg msg[] = {
+ {
+ .addr = i2c->addr,
+ .flags = 0,
+ .len = length,
+ .buf = txData,
+ .scl_rate = 200*1000,
+ }, };
+
+ if (i2c_transfer(i2c->adapter, msg, 1) < 0) {
+ dev_err(&i2c->dev, "%s: transfer failed.", __func__);
+ return -EIO;
+ }
+
+ dev_vdbg(&i2c->dev, "TxData: len=%02x, addr=%02x data=%02x",
+ length, txData[0], txData[1]);
+ return 0;
+}
+
+static int akm8963_i2c_check_device(
+ struct i2c_client *client)
+{
+ unsigned char buffer[2];
+ int err;
+
+ /* Set measure mode */
+ buffer[0] = AK8963_REG_WIA;
+ err = akm8963_i2c_rxdata(client, buffer, 1);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "%s: Can not read WIA.", __func__);
+ return err;
+ }
+ /* Check read data */
+ if (buffer[0] != 0x48) {
+ dev_err(&client->dev,
+ "%s: The device is not AK8963.", __func__);
+ return -ENXIO;
+ }
+
+ //printk("========[%x] ,[%x]" , buffer[0],buffer[1]);
+ return err;
+}
+
+/***** akm miscdevice functions *************************************/
+static int AKECS_Open(struct inode *inode, struct file *file);
+static int AKECS_Release(struct inode *inode, struct file *file);
+static long AKECS_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg);
+
+static struct file_operations AKECS_fops = {
+ .owner = THIS_MODULE,
+ .open = AKECS_Open,
+ .release = AKECS_Release,
+ .unlocked_ioctl = AKECS_ioctl,
+};
+
+static struct miscdevice akm8963_dev = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "akm8963_dev",
+ .fops = &AKECS_fops,
+};
+
+static int AKECS_Set_CNTL1(
+ struct akm8963_data *akm,
+ unsigned char mode)
+{
+ unsigned char buffer[2];
+ int err;
+
+ /* Busy check */
+ if (atomic_cmpxchg(&akm->is_busy, 0, 1) != 0) {
+ dev_err(&akm->i2c->dev, "%s: device is busy.", __func__);
+ return -EBUSY;
+ }
+
+ /* Set flag */
+ atomic_set(&akm->drdy, 0);
+
+ /* Set measure mode */
+ buffer[0] = AK8963_REG_CNTL1;
+ buffer[1] = mode;
+ err = akm8963_i2c_txdata(akm->i2c, buffer, 2);
+ if (err < 0) {
+ dev_err(&akm->i2c->dev, "%s: Can not set CNTL.", __func__);
+ atomic_set(&akm->is_busy, 0);
+ } else {
+ dev_dbg(&akm->i2c->dev, "Mode is set to (%d).", mode);
+ }
+
+ return err;
+}
+
+static int AKECS_Set_PowerDown(
+ struct akm8963_data *akm)
+{
+ unsigned char buffer[2];
+ int err;
+
+ /* Set measure mode */
+ buffer[0] = AK8963_REG_CNTL1;
+ buffer[1] = AK8963_MODE_POWERDOWN;
+ err = akm8963_i2c_txdata(akm->i2c, buffer, 2);
+ if (err < 0) {
+ dev_err(&akm->i2c->dev,
+ "%s: Can not set to measurement mode.", __func__);
+ atomic_set(&akm->is_busy, 0);
+ } else {
+ dev_dbg(&akm->i2c->dev, "Powerdown mode is set.");
+ }
+
+ /* Set to initial status. */
+ atomic_set(&akm->is_busy, 0);
+ atomic_set(&akm->drdy, 0);
+
+ return err;
+}
+
+static int AKECS_Reset(
+ struct akm8963_data *akm,
+ int hard)
+{
+ unsigned char buffer[2];
+ int err = 0;
+
+ if (hard != 0) {
+ gpio_set_value(akm->rstn, 0);
+ udelay(5);
+ gpio_set_value(akm->rstn, 1);
+ } else {
+ /* Set measure mode */
+ buffer[0] = AK8963_REG_CNTL2;
+ buffer[1] = 0x01;
+ err = akm8963_i2c_txdata(akm->i2c, buffer, 2);
+ if (err < 0) {
+ dev_err(&akm->i2c->dev,
+ "%s: Can not set SRST bit.", __func__);
+ } else {
+ dev_dbg(&akm->i2c->dev, "Soft reset is done.");
+ }
+ }
+
+ /* Device will be accessible 100 us after */
+ udelay(100);
+
+ return err;
+}
+
+static int AKECS_SetMode(
+ struct akm8963_data *akm,
+ unsigned char mode)
+{
+ int err;
+
+ switch (mode & 0x0F) {
+ case AK8963_MODE_SNG_MEASURE:
+ case AK8963_MODE_SELF_TEST:
+ case AK8963_MODE_FUSE_ACCESS:
+ err = AKECS_Set_CNTL1(akm, mode);
+ if ((err >= 0) && (akm->irq == 0)) {
+ schedule_delayed_work(
+ &akm->work,
+ usecs_to_jiffies(AK8963_MEASUREMENT_TIME_US));
+ }
+ break;
+ case AK8963_MODE_POWERDOWN:
+ err = AKECS_Set_PowerDown(akm);
+ break;
+ default:
+ dev_err(&akm->i2c->dev,
+ "%s: Unknown mode(%d).", __func__, mode);
+ return -EINVAL;
+ }
+
+ /* wait at least 100us after changing mode */
+ udelay(100);
+
+ return err;
+}
+
+/* This function will block a process until the latest measurement
+ * data is available.
+ */
+static int AKECS_GetData(
+ struct akm8963_data *akm,
+ char *rbuf,
+ int size)
+{
+ int err;
+ err = wait_event_interruptible_timeout(
+ akm->drdy_wq,
+ atomic_read(&akm->drdy),
+ AKM8963_DRDY_TIMEOUT);
+
+ if (err < 0) {
+ dev_err(&akm->i2c->dev,
+ "%s: wait_event failed (%d).", __func__, err);
+ return -1;
+ }
+ if (!atomic_read(&akm->drdy)) {
+ dev_err(&akm->i2c->dev,
+ "%s: DRDY is not set.", __func__);
+ return -1;
+ }
+
+ mutex_lock(&akm->sensor_mutex);
+ memcpy(rbuf, akm->sense_data, size);
+ atomic_set(&akm->drdy, 0);
+ mutex_unlock(&akm->sensor_mutex);
+
+ return 0;
+}
+
+static void AKECS_SetYPR(
+ struct akm8963_data *akm,
+ int *rbuf)
+{
+ uint32_t ready;
+ dev_vdbg(&akm->i2c->dev, "AKM8963 %s: flag =0x%X", __func__,
+ rbuf[0]);
+ dev_vdbg(&akm->input->dev, " Acceleration[LSB]: %6d,%6d,%6d stat=%d",
+ rbuf[1], rbuf[2], rbuf[3], rbuf[4]);
+ dev_vdbg(&akm->input->dev, " Geomagnetism[LSB]: %6d,%6d,%6d stat=%d",
+ rbuf[5], rbuf[6], rbuf[7], rbuf[8]);
+ dev_vdbg(&akm->input->dev, " Orientation[YPR] : %6d,%6d,%6d",
+ rbuf[9], rbuf[10], rbuf[11]);
+
+ /* No events are reported */
+ if (!rbuf[0]) {
+ dev_dbg(&akm->i2c->dev, "Don't waste a time.");
+ return;
+ }
+
+ mutex_lock(&akm->val_mutex);
+ ready = (akm->enable_flag & (uint32_t)rbuf[0]);
+ mutex_unlock(&akm->val_mutex);
+
+ /* Report acceleration sensor information */
+ if (ready & ACC_DATA_READY) {
+ input_report_abs(akm->input, ABS_X, rbuf[1]);
+ input_report_abs(akm->input, ABS_Y, rbuf[2]);
+ input_report_abs(akm->input, ABS_Z, rbuf[3]);
+ input_report_abs(akm->input, ABS_THROTTLE, rbuf[4]);
+ }
+ /* Report magnetic vector information */
+ if (ready & MAG_DATA_READY) {
+ input_report_abs(akm->input, ABS_RX, rbuf[5]);
+ input_report_abs(akm->input, ABS_RY, rbuf[6]);
+ input_report_abs(akm->input, ABS_RZ, rbuf[7]);
+ input_report_abs(akm->input, ABS_RUDDER, rbuf[8]);
+ }
+ /* Report orientation sensor information */
+ if (ready & ORI_DATA_READY) {
+ input_report_abs(akm->input, ABS_HAT0X, rbuf[9]);
+ input_report_abs(akm->input, ABS_HAT0Y, rbuf[10]);
+ input_report_abs(akm->input, ABS_HAT1X, rbuf[11]);
+ input_report_abs(akm->input, ABS_HAT1Y, rbuf[4]);
+ }
+
+ input_sync(akm->input);
+}
+
+static int AKECS_GetOpenStatus(
+ struct akm8963_data *akm)
+{
+ return wait_event_interruptible(
+ akm->open_wq, (atomic_read(&akm->active) != 0));
+}
+
+static int AKECS_GetCloseStatus(
+ struct akm8963_data *akm)
+{
+ return wait_event_interruptible(
+ akm->open_wq, (atomic_read(&akm->active) <= 0));
+}
+
+static int AKECS_Open(struct inode *inode, struct file *file)
+{
+ file->private_data = s_akm;
+ return nonseekable_open(inode, file);
+}
+
+static int AKECS_Release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static long
+AKECS_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ struct akm8963_data *akm = file->private_data;
+
+ /* NOTE: In this function the size of "char" should be 1-byte. */
+ char i2c_buf[RWBUF_SIZE]; /* for READ/WRITE */
+ int8_t sensor_buf[SENSOR_DATA_SIZE];/* for GETDATA */
+ int32_t ypr_buf[YPR_DATA_SIZE]; /* for SET_YPR */
+ int16_t acc_buf[3]; /* for GET_ACCEL */
+ int64_t delay[AKM_NUM_SENSORS]; /* for GET_DELAY */
+ char mode; /* for SET_MODE*/
+ char layout; /* for GET_LAYOUT */
+ char outbit; /* for GET_OUTBIT */
+ int status; /* for OPEN/CLOSE_STATUS */
+ int ret = -1; /* Return value. */
+
+ switch (cmd) {
+ case ECS_IOCTL_READ:
+ case ECS_IOCTL_WRITE:
+ if (argp == NULL) {
+ dev_err(&akm->i2c->dev, "invalid argument.");
+ return -EINVAL;
+ }
+ if (copy_from_user(&i2c_buf, argp, sizeof(i2c_buf))) {
+ dev_err(&akm->i2c->dev, "copy_from_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_SET_MODE:
+ if (argp == NULL) {
+ dev_err(&akm->i2c->dev, "invalid argument.");
+ return -EINVAL;
+ }
+ if (copy_from_user(&mode, argp, sizeof(mode))) {
+ dev_err(&akm->i2c->dev, "copy_from_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_SET_YPR:
+ if (argp == NULL) {
+ dev_err(&akm->i2c->dev, "invalid argument.");
+ return -EINVAL;
+ }
+ if (copy_from_user(&ypr_buf, argp, sizeof(ypr_buf))) {
+ dev_err(&akm->i2c->dev, "copy_from_user failed.");
+ return -EFAULT;
+ }
+ case ECS_IOCTL_GETDATA:
+ case ECS_IOCTL_GET_OPEN_STATUS:
+ case ECS_IOCTL_GET_CLOSE_STATUS:
+ case ECS_IOCTL_GET_DELAY:
+ case ECS_IOCTL_GET_LAYOUT:
+ case ECS_IOCTL_GET_OUTBIT:
+ case ECS_IOCTL_GET_ACCEL:
+ /* Just check buffer pointer */
+ if (argp == NULL) {
+ dev_err(&akm->i2c->dev, "invalid argument.");
+ return -EINVAL;
+ }
+ break;
+ break;
+ default:
+ break;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_READ:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_READ called.");
+ if ((i2c_buf[0] < 1) || (i2c_buf[0] > (RWBUF_SIZE-1))) {
+ dev_err(&akm->i2c->dev, "invalid argument.");
+ return -EINVAL;
+ }
+ ret = akm8963_i2c_rxdata(akm->i2c, &i2c_buf[1], i2c_buf[0]);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_WRITE:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_WRITE called.");
+ if ((i2c_buf[0] < 2) || (i2c_buf[0] > (RWBUF_SIZE-1))) {
+ dev_err(&akm->i2c->dev, "invalid argument.");
+ return -EINVAL;
+ }
+ ret = akm8963_i2c_txdata(akm->i2c, &i2c_buf[1], i2c_buf[0]);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_SET_MODE:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_SET_MODE called.");
+ ret = AKECS_SetMode(akm, mode);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_GETDATA:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_GETDATA called.");
+ ret = AKECS_GetData(akm, sensor_buf, SENSOR_DATA_SIZE);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_SET_YPR:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_SET_YPR called.");
+ AKECS_SetYPR(akm, ypr_buf);
+ break;
+ case ECS_IOCTL_GET_OPEN_STATUS:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_GET_OPEN_STATUS called.");
+ ret = AKECS_GetOpenStatus(akm);
+ if (ret < 0) {
+ dev_err(&akm->i2c->dev,
+ "Get Open returns error (%d).", ret);
+ }
+ break;
+ case ECS_IOCTL_GET_CLOSE_STATUS:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_GET_CLOSE_STATUS called.");
+ ret = AKECS_GetCloseStatus(akm);
+ if (ret < 0) {
+ dev_err(&akm->i2c->dev,
+ "Get Close returns error (%d).", ret);
+ }
+ break;
+ case ECS_IOCTL_GET_DELAY:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_GET_DELAY called.");
+ mutex_lock(&akm->val_mutex);
+ delay[0] = akm->delay[0];
+ delay[1] = akm->delay[1];
+ delay[2] = akm->delay[2];
+ mutex_unlock(&akm->val_mutex);
+ break;
+ case ECS_IOCTL_GET_LAYOUT:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_GET_LAYOUT called.");
+ layout = akm->layout;
+ break;
+ case ECS_IOCTL_GET_OUTBIT:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_GET_OUTBIT called.");
+ outbit = akm->outbit;
+ break;
+ case ECS_IOCTL_RESET:
+ ret = AKECS_Reset(akm, akm->rstn);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_GET_ACCEL:
+ dev_vdbg(&akm->i2c->dev, "IOCTL_GET_ACCEL called.");
+ mutex_lock(&akm->accel_mutex);
+ acc_buf[0] = akm->accel_data[0];
+ acc_buf[1] = akm->accel_data[1];
+ acc_buf[2] = akm->accel_data[2];
+ mutex_unlock(&akm->accel_mutex);
+ break;
+ default:
+ return -ENOTTY;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_READ:
+ if (copy_to_user(argp, &i2c_buf, i2c_buf[0]+1)) {
+ dev_err(&akm->i2c->dev, "copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_GETDATA:
+ if (copy_to_user(argp, &sensor_buf, sizeof(sensor_buf))) {
+ dev_err(&akm->i2c->dev, "copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_GET_OPEN_STATUS:
+ case ECS_IOCTL_GET_CLOSE_STATUS:
+ status = atomic_read(&akm->active);
+ if (copy_to_user(argp, &status, sizeof(status))) {
+ dev_err(&akm->i2c->dev, "copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_GET_DELAY:
+ if (copy_to_user(argp, &delay, sizeof(delay))) {
+ dev_err(&akm->i2c->dev, "copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_GET_LAYOUT:
+ if (copy_to_user(argp, &layout, sizeof(layout))) {
+ dev_err(&akm->i2c->dev, "copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_GET_OUTBIT:
+ if (copy_to_user(argp, &outbit, sizeof(outbit))) {
+ dev_err(&akm->i2c->dev, "copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_GET_ACCEL:
+ if (copy_to_user(argp, &acc_buf, sizeof(acc_buf))) {
+ dev_err(&akm->i2c->dev, "copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/***** akm sysfs functions ******************************************/
+static int create_device_attributes(
+ struct device *dev,
+ struct device_attribute *attrs)
+{
+ int i;
+ int err = 0;
+
+ for (i = 0 ; NULL != attrs[i].attr.name ; ++i) {
+ err = device_create_file(dev, &attrs[i]);
+ if (0 != err)
+ break;
+ }
+
+ if (0 != err) {
+ for (; i >= 0 ; --i)
+ device_remove_file(dev, &attrs[i]);
+ }
+
+ return err;
+}
+
+static void remove_device_attributes(
+ struct device *dev,
+ struct device_attribute *attrs)
+{
+ int i;
+
+ for (i = 0 ; NULL != attrs[i].attr.name ; ++i)
+ device_remove_file(dev, &attrs[i]);
+}
+
+static int create_device_binary_attributes(
+ struct kobject *kobj,
+ struct bin_attribute *attrs)
+{
+ int i;
+ int err = 0;
+
+ err = 0;
+
+ for (i = 0 ; NULL != attrs[i].attr.name ; ++i) {
+ err = sysfs_create_bin_file(kobj, &attrs[i]);
+ if (0 != err)
+ break;
+ }
+
+ if (0 != err) {
+ for (; i >= 0 ; --i)
+ sysfs_remove_bin_file(kobj, &attrs[i]);
+ }
+
+ return err;
+}
+
+static void remove_device_binary_attributes(
+ struct kobject *kobj,
+ struct bin_attribute *attrs)
+{
+ int i;
+
+ for (i = 0 ; NULL != attrs[i].attr.name ; ++i)
+ sysfs_remove_bin_file(kobj, &attrs[i]);
+}
+
+static bool get_value_as_int(char const *buf, size_t size, int *value)
+{
+ long tmp;
+
+ if (size == 0)
+ return false;
+
+ /* maybe text format value */
+ if ((buf[0] == '0') && (size > 1)) {
+ if ((buf[1] == 'x') || (buf[1] == 'X')) {
+ /* hexadecimal format */
+ if (0 != strict_strtol(buf, 16, &tmp))
+ return false;
+ } else {
+ /* octal format */
+ if (0 != strict_strtol(buf, 8, &tmp))
+ return false;
+ }
+ } else {
+ /* decimal format */
+ if (0 != strict_strtol(buf, 10, &tmp))
+ return false;
+ }
+
+ if (tmp > INT_MAX)
+ return false;
+
+ *value = tmp;
+
+ return true;
+}
+
+static bool get_value_as_int64(char const *buf, size_t size, long long *value)
+{
+ long long tmp;
+
+ if (size == 0)
+ return false;
+
+ /* maybe text format value */
+ if ((buf[0] == '0') && (size > 1)) {
+ if ((buf[1] == 'x') || (buf[1] == 'X')) {
+ /* hexadecimal format */
+ if (0 != strict_strtoll(buf, 16, &tmp))
+ return false;
+ } else {
+ /* octal format */
+ if (0 != strict_strtoll(buf, 8, &tmp))
+ return false;
+ }
+ } else {
+ /* decimal format */
+ if (0 != strict_strtoll(buf, 10, &tmp))
+ return false;
+ }
+
+ if (tmp > LLONG_MAX)
+ return false;
+
+ *value = tmp;
+
+ return true;
+}
+
+/*********************************************************************
+ *
+ * SysFS attribute functions
+ *
+ * directory : /sys/class/compass/akm8963/
+ * files :
+ * - enable_acc [rw] [t] : enable flag for accelerometer
+ * - enable_mag [rw] [t] : enable flag for magnetometer
+ * - enable_ori [rw] [t] : enable flag for orientation
+ * - delay_acc [rw] [t] : delay in nanosecond for accelerometer
+ * - delay_mag [rw] [t] : delay in nanosecond for magnetometer
+ * - delay_ori [rw] [t] : delay in nanosecond for orientation
+ * - accel [w] [b] : accelerometer data
+ *
+ * debug :
+ * - mode [w] [t] : AK8963's mode
+ * - bdata [r] [t] : raw data
+ * - asa [r] [t] : FUSEROM data
+ *
+ * [b] = binary format
+ * [t] = text format
+ */
+
+/***** sysfs enable *************************************************/
+static void akm8963_sysfs_update_active_status(
+ struct akm8963_data *akm)
+{
+ uint32_t en;
+ mutex_lock(&akm->val_mutex);
+ en = akm->enable_flag;
+ mutex_unlock(&akm->val_mutex);
+
+ if (en == 0) {
+ if (atomic_cmpxchg(&akm->active, 1, 0) == 1) {
+ wake_up(&akm->open_wq);
+ dev_dbg(akm->class_dev, "Deactivated");
+ }
+ } else {
+ if (atomic_cmpxchg(&akm->active, 0, 1) == 0) {
+ wake_up(&akm->open_wq);
+ dev_dbg(akm->class_dev, "Activated");
+ }
+ }
+ dev_dbg(&akm->i2c->dev,
+ "Status updated: enable=0x%X, active=%d",
+ en, atomic_read(&akm->active));
+}
+
+static ssize_t akm8963_sysfs_enable_show(
+ struct akm8963_data *akm, char *buf, int pos)
+{
+ int flag;
+
+ mutex_lock(&akm->val_mutex);
+ flag = ((akm->enable_flag >> pos) & 1);
+ mutex_unlock(&akm->val_mutex);
+
+ return sprintf(buf, "%d\n", flag);
+}
+
+static ssize_t akm8963_sysfs_enable_store(
+ struct akm8963_data *akm, char const *buf, size_t count, int pos)
+{
+ int en = 0;
+
+ if (NULL == buf)
+ return -EINVAL;
+
+ if (0 == count)
+ return 0;
+
+ if (false == get_value_as_int(buf, count, &en))
+ return -EINVAL;
+
+ en = en ? 1 : 0;
+
+ mutex_lock(&akm->val_mutex);
+ akm->enable_flag &= ~(1<<pos);
+ akm->enable_flag |= ((uint32_t)(en))<<pos;
+ mutex_unlock(&akm->val_mutex);
+
+ akm8963_sysfs_update_active_status(akm);
+
+ return count;
+}
+
+/***** Acceleration ***/
+static ssize_t akm8963_enable_acc_show(
+ struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return akm8963_sysfs_enable_show(
+ dev_get_drvdata(dev), buf, ACC_DATA_FLAG);
+}
+static ssize_t akm8963_enable_acc_store(
+ struct device *dev, struct device_attribute *attr,
+ char const *buf, size_t count)
+{
+ return akm8963_sysfs_enable_store(
+ dev_get_drvdata(dev), buf, count, ACC_DATA_FLAG);
+}
+
+/***** Magnetic field ***/
+static ssize_t akm8963_enable_mag_show(
+ struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return akm8963_sysfs_enable_show(
+ dev_get_drvdata(dev), buf, MAG_DATA_FLAG);
+}
+static ssize_t akm8963_enable_mag_store(
+ struct device *dev, struct device_attribute *attr,
+ char const *buf, size_t count)
+{
+ return akm8963_sysfs_enable_store(
+ dev_get_drvdata(dev), buf, count, MAG_DATA_FLAG);
+}
+
+/***** Orientation ***/
+static ssize_t akm8963_enable_ori_show(
+ struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return akm8963_sysfs_enable_show(
+ dev_get_drvdata(dev), buf, ORI_DATA_FLAG);
+}
+static ssize_t akm8963_enable_ori_store(
+ struct device *dev, struct device_attribute *attr,
+ char const *buf, size_t count)
+{
+ return akm8963_sysfs_enable_store(
+ dev_get_drvdata(dev), buf, count, ORI_DATA_FLAG);
+}
+
+/***** sysfs delay **************************************************/
+static ssize_t akm8963_sysfs_delay_show(
+ struct akm8963_data *akm, char *buf, int pos)
+{
+ int64_t val;
+
+ mutex_lock(&akm->val_mutex);
+ val = akm->delay[pos];
+ mutex_unlock(&akm->val_mutex);
+
+ return sprintf(buf, "%lld\n", val);
+}
+
+static ssize_t akm8963_sysfs_delay_store(
+ struct akm8963_data *akm, char const *buf, size_t count, int pos)
+{
+ long long val = 0;
+
+ if (NULL == buf)
+ return -EINVAL;
+
+ if (0 == count)
+ return 0;
+
+ if (false == get_value_as_int64(buf, count, &val))
+ return -EINVAL;
+
+ mutex_lock(&akm->val_mutex);
+ akm->delay[pos] = val;
+ mutex_unlock(&akm->val_mutex);
+
+ return count;
+}
+
+/***** Accelerometer ***/
+static ssize_t akm8963_delay_acc_show(
+ struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return akm8963_sysfs_delay_show(
+ dev_get_drvdata(dev), buf, ACC_DATA_FLAG);
+}
+static ssize_t akm8963_delay_acc_store(
+ struct device *dev, struct device_attribute *attr,
+ char const *buf, size_t count)
+{
+ return akm8963_sysfs_delay_store(
+ dev_get_drvdata(dev), buf, count, ACC_DATA_FLAG);
+}
+
+/***** Magnetic field ***/
+static ssize_t akm8963_delay_mag_show(
+ struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return akm8963_sysfs_delay_show(
+ dev_get_drvdata(dev), buf, MAG_DATA_FLAG);
+}
+static ssize_t akm8963_delay_mag_store(
+ struct device *dev, struct device_attribute *attr,
+ char const *buf, size_t count)
+{
+ return akm8963_sysfs_delay_store(
+ dev_get_drvdata(dev), buf, count, MAG_DATA_FLAG);
+}
+
+/***** Orientation ***/
+static ssize_t akm8963_delay_ori_show(
+ struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return akm8963_sysfs_delay_show(
+ dev_get_drvdata(dev), buf, ORI_DATA_FLAG);
+}
+static ssize_t akm8963_delay_ori_store(
+ struct device *dev, struct device_attribute *attr,
+ char const *buf, size_t count)
+{
+ return akm8963_sysfs_delay_store(
+ dev_get_drvdata(dev), buf, count, ORI_DATA_FLAG);
+}
+
+
+/***** accel (binary) ***/
+static ssize_t akm8963_bin_accel_write(
+ struct file *file,
+ struct kobject *kobj,
+ struct bin_attribute *attr,
+ char *buf,
+ loff_t pos,
+ size_t size)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct akm8963_data *akm = dev_get_drvdata(dev);
+ int16_t *accel_data;
+
+ if (size == 0)
+ return 0;
+
+ accel_data = (int16_t*)buf;
+
+ mutex_lock(&akm->accel_mutex);
+ akm->accel_data[0] = accel_data[0];
+ akm->accel_data[1] = accel_data[1];
+ akm->accel_data[2] = accel_data[2];
+ mutex_unlock(&akm->accel_mutex);
+
+ dev_vdbg(&akm->i2c->dev, "accel:%d,%d,%d\n",
+ accel_data[0], accel_data[1], accel_data[2]);
+
+ return size;
+}
+
+
+#ifdef AKM8963_DEBUG_IF
+static ssize_t akm8963_mode_store(
+ struct device *dev, struct device_attribute *attr,
+ char const *buf, size_t count)
+{
+ struct akm8963_data *akm = dev_get_drvdata(dev);
+ int mode = 0;
+
+ if (NULL == buf)
+ return -EINVAL;
+
+ if (0 == count)
+ return 0;
+
+ if (false == get_value_as_int(buf, count, &mode))
+ return -EINVAL;
+
+ if (AKECS_SetMode(akm, mode) < 0)
+ return -EINVAL;
+
+ return 1;
+}
+
+static ssize_t akm8963_bdata_show(
+ struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct akm8963_data *akm = dev_get_drvdata(dev);
+ char rbuf[SENSOR_DATA_SIZE];
+
+ mutex_lock(&akm->sensor_mutex);
+ memcpy(&rbuf, akm->sense_data, sizeof(rbuf));
+ mutex_unlock(&akm->sensor_mutex);
+
+ return sprintf(buf,
+ "0x%02X,0x%02X,0x%02X,0x%02X,"
+ "0x%02X,0x%02X,0x%02X,0x%02X\n",
+ rbuf[0],rbuf[1],rbuf[2],rbuf[3],
+ rbuf[4],rbuf[5],rbuf[6],rbuf[7]);
+}
+
+static ssize_t akm8963_asa_show(
+ struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct akm8963_data *akm = dev_get_drvdata(dev);
+ int err;
+ unsigned char asa[3];
+
+ err = AKECS_SetMode(akm, AK8963_MODE_FUSE_ACCESS);
+ if (err < 0)
+ return err;
+
+ asa[0] = AK8963_FUSE_ASAX;
+ err = akm8963_i2c_rxdata(akm->i2c, asa, 3);
+ if (err < 0)
+ return err;
+
+ err = AKECS_SetMode(akm, AK8963_MODE_POWERDOWN);
+ if (err < 0)
+ return err;
+
+ return sprintf(buf, "0x%02X,0x%02X,0x%02X\n",
+ asa[0], asa[1], asa[2]);
+}
+#endif
+
+static struct device_attribute akm8963_attributes[] = {
+ __ATTR(enable_acc, 0660, akm8963_enable_acc_show, akm8963_enable_acc_store),
+ __ATTR(enable_mag, 0660, akm8963_enable_mag_show, akm8963_enable_mag_store),
+ __ATTR(enable_ori, 0660, akm8963_enable_ori_show, akm8963_enable_ori_store),
+ __ATTR(delay_acc, 0660, akm8963_delay_acc_show, akm8963_delay_acc_store),
+ __ATTR(delay_mag, 0660, akm8963_delay_mag_show, akm8963_delay_mag_store),
+ __ATTR(delay_ori, 0660, akm8963_delay_ori_show, akm8963_delay_ori_store),
+#ifdef AKM8963_DEBUG_IF
+ __ATTR(mode, 0220, NULL, akm8963_mode_store),
+ __ATTR(bdata, 0440, akm8963_bdata_show, NULL),
+ __ATTR(asa, 0440, akm8963_asa_show, NULL),
+#endif
+ __ATTR_NULL,
+};
+
+#define __BIN_ATTR(name_, mode_, size_, private_, read_, write_) \
+ { \
+ .attr = { .name = __stringify(name_), .mode = mode_ }, \
+ .size = size_, \
+ .private = private_, \
+ .read = read_, \
+ .write = write_, \
+ }
+
+#define __BIN_ATTR_NULL \
+ { \
+ .attr = { .name = NULL }, \
+ }
+
+static struct bin_attribute akm8963_bin_attributes[] = {
+ __BIN_ATTR(accel, 0220, 6, NULL,
+ NULL, akm8963_bin_accel_write),
+ __BIN_ATTR_NULL
+};
+
+static char const *const compass_class_name = "compass";
+static char const *const akm8963_device_name = "akm8963";
+static char const *const device_link_name = "i2c";
+static dev_t const akm8963_device_dev_t = MKDEV(MISC_MAJOR, 240);
+
+static int create_sysfs_interfaces(struct akm8963_data *akm)
+{
+ int err;
+
+ if (NULL == akm)
+ return -EINVAL;
+
+ err = 0;
+
+ akm->compass = class_create(THIS_MODULE, compass_class_name);
+ if (IS_ERR(akm->compass)) {
+ err = PTR_ERR(akm->compass);
+ goto exit_class_create_failed;
+ }
+
+ akm->class_dev = device_create(
+ akm->compass,
+ NULL,
+ akm8963_device_dev_t,
+ akm,
+ akm8963_device_name);
+ if (IS_ERR(akm->class_dev)) {
+ err = PTR_ERR(akm->class_dev);
+ goto exit_class_device_create_failed;
+ }
+
+ err = sysfs_create_link(
+ &akm->class_dev->kobj,
+ &akm->i2c->dev.kobj,
+ device_link_name);
+ if (0 > err)
+ goto exit_sysfs_create_link_failed;
+
+ err = create_device_attributes(
+ akm->class_dev,
+ akm8963_attributes);
+ if (0 > err)
+ goto exit_device_attributes_create_failed;
+
+ err = create_device_binary_attributes(
+ &akm->class_dev->kobj,
+ akm8963_bin_attributes);
+ if (0 > err)
+ goto exit_device_binary_attributes_create_failed;
+
+ return err;
+
+exit_device_binary_attributes_create_failed:
+ remove_device_attributes(akm->class_dev, akm8963_attributes);
+exit_device_attributes_create_failed:
+ sysfs_remove_link(&akm->class_dev->kobj, device_link_name);
+exit_sysfs_create_link_failed:
+ device_destroy(akm->compass, akm8963_device_dev_t);
+exit_class_device_create_failed:
+ akm->class_dev = NULL;
+ class_destroy(akm->compass);
+exit_class_create_failed:
+ akm->compass = NULL;
+ return err;
+}
+
+static void remove_sysfs_interfaces(struct akm8963_data *akm)
+{
+ if (NULL == akm)
+ return;
+
+ if (NULL != akm->class_dev) {
+ remove_device_binary_attributes(
+ &akm->class_dev->kobj,
+ akm8963_bin_attributes);
+ remove_device_attributes(
+ akm->class_dev,
+ akm8963_attributes);
+ sysfs_remove_link(
+ &akm->class_dev->kobj,
+ device_link_name);
+ akm->class_dev = NULL;
+ }
+ if (NULL != akm->compass) {
+ device_destroy(
+ akm->compass,
+ akm8963_device_dev_t);
+ class_destroy(akm->compass);
+ akm->compass = NULL;
+ }
+}
+
+
+/***** akm input device functions ***********************************/
+static int akm8963_input_init(
+ struct input_dev **input)
+{
+ int err = 0;
+
+ /* Declare input device */
+ *input = input_allocate_device();
+ if (!*input)
+ return -ENOMEM;
+
+ /* Setup input device */
+ set_bit(EV_ABS, (*input)->evbit);
+ /* Accelerometer (720 x 16G)*/
+ input_set_abs_params(*input, ABS_X,
+ -11520, 11520, 0, 0);
+ input_set_abs_params(*input, ABS_Y,
+ -11520, 11520, 0, 0);
+ input_set_abs_params(*input, ABS_Z,
+ -11520, 11520, 0, 0);
+ input_set_abs_params(*input, ABS_THROTTLE,
+ 0, 3, 0, 0);
+ /* Magnetic field (-81900, 81900) -> limited to 16bit*/
+ input_set_abs_params(*input, ABS_RX,
+ -32768, 32767, 0, 0);
+ input_set_abs_params(*input, ABS_RY,
+ -32768, 32767, 0, 0);
+ input_set_abs_params(*input, ABS_RZ,
+ -32768, 32767, 0, 0);
+ input_set_abs_params(*input, ABS_RUDDER,
+ 0, 3, 0, 0);
+ /* Orientation (yaw:0,360 pitch:-180,180 roll:-90,90) */
+ input_set_abs_params(*input, ABS_HAT0X,
+ 0, 23040, 0, 0);
+ input_set_abs_params(*input, ABS_HAT0Y,
+ -11520, 11520, 0, 0);
+ input_set_abs_params(*input, ABS_HAT1X,
+ -5760, 5760, 0, 0);
+ input_set_abs_params(*input, ABS_HAT1Y,
+ 0, 3, 0, 0);
+
+ /* Set name */
+ (*input)->name = "compass";
+
+ /* Register */
+ err = input_register_device(*input);
+ if (err) {
+ input_free_device(*input);
+ return err;
+ }
+
+ return err;
+}
+
+/***** akm functions ************************************************/
+
+static irqreturn_t akm8963_irq(int irq, void *handle)
+{
+ struct akm8963_data *akm = handle;
+ char buffer[SENSOR_DATA_SIZE];
+ int err;
+
+ memset(buffer, 0, sizeof(buffer));
+ buffer[0] = AK8963_REG_ST1;
+ err = akm8963_i2c_rxdata(akm->i2c, buffer, SENSOR_DATA_SIZE);
+ if (err < 0) {
+ dev_err(&akm->i2c->dev, "%s failed.", __func__);
+ goto work_func_end;
+ }
+ /* Check ST bit */
+ if ((buffer[0] & 0x01) != 0x01) {
+ dev_err(&akm->i2c->dev, "%s ST is not set.", __func__);
+ goto work_func_end;
+ }
+
+ mutex_lock(&akm->sensor_mutex);
+ memcpy(akm->sense_data, buffer, SENSOR_DATA_SIZE);
+ mutex_unlock(&akm->sensor_mutex);
+
+ atomic_set(&akm->drdy, 1);
+ atomic_set(&akm->is_busy, 0);
+ wake_up(&akm->drdy_wq);
+
+work_func_end:
+ return IRQ_HANDLED;
+}
+
+static void akm8963_delayed_work(struct work_struct *work)
+{
+ struct akm8963_data *akm = container_of(
+ work, struct akm8963_data, work.work);
+
+ akm8963_irq(akm->irq, akm);
+}
+
+static int akm8963_suspend(struct device *dev)
+{
+ struct akm8963_data *akm = dev_get_drvdata(dev);
+ dev_dbg(&akm->i2c->dev, "suspended\n");
+
+ return 0;
+}
+
+static int akm8963_resume(struct device *dev)
+{
+ struct akm8963_data *akm = dev_get_drvdata(dev);
+ dev_dbg(&akm->i2c->dev, "resumed\n");
+
+ return 0;
+}
+
+int akm8963_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct akm8963_platform_data *pdata;
+ int err = 0;
+ int i;
+
+ dev_dbg(&client->dev, "start probing.");
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "%s: check_functionality failed.", __func__);
+ err = -ENODEV;
+ goto exit0;
+ }
+
+ /* Allocate memory for driver data */
+ s_akm = kzalloc(sizeof(struct akm8963_data), GFP_KERNEL);
+ if (!s_akm) {
+ dev_err(&client->dev, "%s: memory allocation failed.", __func__);
+ err = -ENOMEM;
+ goto exit1;
+ }
+
+ /***** Set layout information *****/
+ pdata = client->dev.platform_data;
+ if (pdata) {
+ /* Platform data is available. copy its value to local. */
+ s_akm->layout = pdata->layout;
+ s_akm->outbit = pdata->outbit;
+ s_akm->rstn = pdata->gpio_RST;
+ } else {
+ /* Platform data is not available.
+ Layout and Outbit information should be set by each application. */
+ dev_dbg(&client->dev, "%s: No platform data.", __func__);
+ s_akm->layout = 0;
+ s_akm->outbit = 0;
+ s_akm->rstn = 0;
+ }
+
+ /***** I2C initialization *****/
+ s_akm->i2c = client;
+ /* check connection */
+ err = akm8963_i2c_check_device(client);
+ if (err < 0)
+ goto exit2;
+ /* set client data */
+ i2c_set_clientdata(client, s_akm);
+
+
+ /***** input *****/
+ err = akm8963_input_init(&s_akm->input);
+ if (err) {
+ dev_err(&client->dev,
+ "%s: input_dev register failed", __func__);
+ goto exit3;
+ }
+ input_set_drvdata(s_akm->input, s_akm);
+
+
+ /**** initialize variables in akm8963_data *****/
+ init_waitqueue_head(&s_akm->drdy_wq);
+ init_waitqueue_head(&s_akm->open_wq);
+
+ mutex_init(&s_akm->sensor_mutex);
+ mutex_init(&s_akm->accel_mutex);
+ mutex_init(&s_akm->val_mutex);
+
+ atomic_set(&s_akm->active, 0);
+ atomic_set(&s_akm->is_busy, 0);
+ atomic_set(&s_akm->drdy, 0);
+ atomic_set(&s_akm->suspend, 0);
+
+ s_akm->enable_flag = 0;
+ for (i=0; i<AKM_NUM_SENSORS; i++)
+ s_akm->delay[i] = -1;
+
+
+ /***** IRQ setup *****/
+ s_akm->irq = client->irq;
+
+
+ if (s_akm->irq == 0) {
+ dev_dbg(&client->dev, "%s: IRQ is not set.", __func__);
+ /* Use timer to notify measurement end */
+ INIT_DELAYED_WORK(&s_akm->work, akm8963_delayed_work);
+ } else {
+ err = request_threaded_irq(
+ s_akm->irq,
+ NULL,
+ akm8963_irq,
+ IRQF_TRIGGER_HIGH|IRQF_ONESHOT,
+ dev_name(&client->dev),
+ s_akm);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "%s: request irq failed.", __func__);
+ goto exit4;
+ }
+ }
+
+ /***** misc *****/
+ err = misc_register(&akm8963_dev);
+ if (err) {
+ dev_err(&client->dev,
+ "%s: akm8963_dev register failed", __func__);
+ goto exit5;
+ }
+
+ /***** sysfs *****/
+ err = create_sysfs_interfaces(s_akm);
+ if (0 > err) {
+ dev_err(&client->dev,
+ "%s: create sysfs failed.", __func__);
+ goto exit6;
+ }
+
+ dev_info(&client->dev, "successfully probed.");
+ return 0;
+
+exit6:
+ misc_deregister(&akm8963_dev);
+exit5:
+ if (s_akm->irq)
+ free_irq(s_akm->irq, s_akm);
+exit4:
+ input_unregister_device(s_akm->input);
+exit3:
+exit2:
+ kfree(s_akm);
+exit1:
+exit0:
+ return err;
+}
+
+static int akm8963_remove(struct i2c_client *client)
+{
+ struct akm8963_data *akm = i2c_get_clientdata(client);
+
+ remove_sysfs_interfaces(akm);
+ if (misc_deregister(&akm8963_dev) < 0)
+ dev_err(&client->dev, "misc deregister failed.");
+ if (akm->irq)
+ free_irq(akm->irq, akm);
+ input_unregister_device(akm->input);
+ kfree(akm);
+ dev_info(&client->dev, "successfully removed.");
+ return 0;
+}
+
+static const struct i2c_device_id akm8963_id[] = {
+ {AKM8963_I2C_NAME, 0 },
+ { }
+};
+
+static const struct dev_pm_ops akm8963_pm_ops = {
+ .suspend = akm8963_suspend,
+ .resume = akm8963_resume,
+};
+
+static struct i2c_driver akm8963_driver = {
+ .probe = akm8963_probe,
+ .remove = akm8963_remove,
+ .id_table = akm8963_id,
+ .driver = {
+ .name = AKM8963_I2C_NAME,
+ .pm = &akm8963_pm_ops,
+ },
+};
+
+static int __init akm8963_init(void)
+{
+ printk(KERN_INFO "AKM8963 compass driver: initialize.");
+ return i2c_add_driver(&akm8963_driver);
+}
+
+static void __exit akm8963_exit(void)
+{
+ printk(KERN_INFO "AKM8963 compass driver: release.");
+ i2c_del_driver(&akm8963_driver);
+}
+
+module_init(akm8963_init);
+module_exit(akm8963_exit);
+
+MODULE_AUTHOR("viral wang <viral_wang@htc.com>");
+MODULE_DESCRIPTION("AKM8963 compass driver");
+MODULE_LICENSE("GPL");
+
projects / firefly-linux-kernel-4.4.55.git / commitdiff