source "drivers/input/misc/Kconfig"
+source "drivers/input/magnetometer/Kconfig"
+
source "drivers/input/gsensor/Kconfig"
source "drivers/input/jogball/Kconfig"
obj-$(CONFIG_INPUT_KEYRESET) += keyreset.o
obj-$(CONFIG_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o
+obj-y += magnetometer/
\ No newline at end of file
--- /dev/null
+#
+# Magnetometer sensors
+#
+
+comment "Magnetometer sensors"
+
+config COMPASS_AK8975
+ tristate "Asahi Kasei AK8975 3-Axis Magnetometer"
+ depends on I2C
+ help
+ Say yes here to build support for Asahi Kasei AK8975 3-Axis
+ Magnetometer.
+
+ To compile this driver as a module, choose M here: the module
+ will be called ak8975.
+
+config COMPASS_AK8973
+ tristate "Asahi Kasei AK8973 3-Axis Magnetometer"
+ depends on I2C
+ help
+ Say yes here to build support for Asahi Kasei AK8973 3-Axis
+ Magnetometer.
+
+ To compile this driver as a module, choose M here: the module
+ will be called ak8973.
--- /dev/null
+#
+# Makefile for industrial I/O Magnetometer sensors
+#
+obj-$(CONFIG_COMPASS_AK8975) := ak8975.o
+obj-$(CONFIG_COMPASS_AK8973) := ak8973.o
\ No newline at end of file
--- /dev/null
+/*
+ * drivers/i2c/chips/ak8973.c - ak8973 compass driver
+ *
+ * Copyright (C) 2008 viral wang <viralwang@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/irq.h>
+#include <linux/miscdevice.h>
+#include <asm/gpio.h>
+#include <asm/uaccess.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/workqueue.h>
+#include <linux/freezer.h>
+#include "ak8973.h"
+#include<linux/earlysuspend.h>
+
+#define DEBUG 0
+#define MAX_FAILURE_COUNT 3
+
+static struct i2c_client *this_client;
+
+struct akm8973_data {
+ struct input_dev *input_dev;
+ struct work_struct work;
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ struct early_suspend early_suspend_akm;
+#endif
+};
+
+/* Addresses to scan -- protected by sense_data_mutex */
+static char sense_data[RBUFF_SIZE + 1];
+static struct mutex sense_data_mutex;
+#define AKM8973_RETRY_COUNT 10
+static DECLARE_WAIT_QUEUE_HEAD(data_ready_wq);
+static DECLARE_WAIT_QUEUE_HEAD(open_wq);
+
+static atomic_t data_ready;
+static atomic_t open_count;
+static atomic_t open_flag;
+static atomic_t reserve_open_flag;
+
+static atomic_t m_flag;
+static atomic_t a_flag;
+static atomic_t t_flag;
+static atomic_t mv_flag;
+
+static int failure_count = 0;
+
+static short akmd_delay = 0;
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static atomic_t suspend_flag = ATOMIC_INIT(0);
+#endif
+
+static int AKI2C_RxData(char *rxData, int length)
+{
+ uint8_t loop_i;
+ struct i2c_msg msgs[] = {
+ {
+ .addr = this_client->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = rxData,
+ },
+ {
+ .addr = this_client->addr,
+ .flags = I2C_M_RD,
+ .len = length,
+ .buf = rxData,
+ },
+ };
+
+ for (loop_i = 0; loop_i < AKM8973_RETRY_COUNT; loop_i++) {
+ if (i2c_transfer(this_client->adapter, msgs, 2) > 0) {
+ break;
+ }
+ mdelay(10);
+ }
+
+ if (loop_i >= AKM8973_RETRY_COUNT) {
+ printk(KERN_ERR "%s retry over %d\n", __func__, AKM8973_RETRY_COUNT);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int AKI2C_TxData(char *txData, int length)
+{
+ uint8_t loop_i;
+ struct i2c_msg msg[] = {
+ {
+ .addr = this_client->addr,
+ .flags = 0,
+ .len = length,
+ .buf = txData,
+ },
+ };
+
+ for (loop_i = 0; loop_i < AKM8973_RETRY_COUNT; loop_i++) {
+ if (i2c_transfer(this_client->adapter, msg, 1) > 0) {
+ break;
+ }
+ mdelay(10);
+ }
+
+ if (loop_i >= AKM8973_RETRY_COUNT) {
+ printk(KERN_ERR "%s retry over %d\n", __func__, AKM8973_RETRY_COUNT);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int AKECS_StartMeasure(void)
+{
+ char buffer[2];
+
+ /* Set measure mode */
+ buffer[0] = AKECS_REG_MS1;
+ buffer[1] = AKECS_MODE_MEASURE;
+
+ /* Set data */
+ return AKI2C_TxData(buffer, 2);
+}
+
+static int AKECS_PowerDown(void)
+{
+ char buffer[2];
+ int ret;
+
+ /* Set powerdown mode */
+ buffer[0] = AKECS_REG_MS1;
+ buffer[1] = AKECS_MODE_POWERDOWN;
+ /* Set data */
+ ret = AKI2C_TxData(buffer, 2);
+ if (ret < 0)
+ return ret;
+
+ /* Dummy read for clearing INT pin */
+ buffer[0] = AKECS_REG_TMPS;
+ /* Read data */
+ ret = AKI2C_RxData(buffer, 1);
+ if (ret < 0)
+ return ret;
+ return ret;
+}
+
+static int AKECS_StartE2PRead(void)
+{
+ char buffer[2];
+
+ /* Set measure mode */
+ buffer[0] = AKECS_REG_MS1;
+ buffer[1] = AKECS_MODE_E2P_READ;
+ /* Set data */
+ return AKI2C_TxData(buffer, 2);
+}
+
+static int AKECS_GetData(void)
+{
+ char buffer[RBUFF_SIZE + 1];
+ int ret;
+
+ memset(buffer, 0, RBUFF_SIZE + 1);
+ buffer[0] = AKECS_REG_ST;
+ ret = AKI2C_RxData(buffer, RBUFF_SIZE+1);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&sense_data_mutex);
+ memcpy(sense_data, buffer, sizeof(buffer));
+ atomic_set(&data_ready, 1);
+ wake_up(&data_ready_wq);
+ mutex_unlock(&sense_data_mutex);
+
+ return 0;
+}
+
+static int AKECS_SetMode(char mode)
+{
+ int ret;
+
+ switch (mode) {
+ case AKECS_MODE_MEASURE:
+ ret = AKECS_StartMeasure();
+ break;
+ case AKECS_MODE_E2P_READ:
+ ret = AKECS_StartE2PRead();
+ break;
+ case AKECS_MODE_POWERDOWN:
+ ret = AKECS_PowerDown();
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* wait at least 300us after changing mode */
+ msleep(1);
+ return ret;
+}
+
+static int AKECS_TransRBuff(char *rbuf, int size)
+{
+ wait_event_interruptible_timeout(data_ready_wq,
+ atomic_read(&data_ready), 1000);
+ if (!atomic_read(&data_ready)) {
+ #ifdef CONFIG_HAS_EARLYSUSPEND
+ if (!atomic_read(&suspend_flag)) {
+ printk(KERN_ERR
+ "AKM8973 AKECS_TransRBUFF: Data not ready\n");
+ failure_count++;
+ if (failure_count >= MAX_FAILURE_COUNT) {
+ printk(KERN_ERR
+ "AKM8973 AKECS_TransRBUFF: successive %d failure.\n",
+ failure_count);
+ atomic_set(&open_flag, -1);
+ wake_up(&open_wq);
+ failure_count = 0;
+ }
+ }
+ #endif
+ return -1;
+ }
+
+ mutex_lock(&sense_data_mutex);
+ memcpy(&rbuf[1], &sense_data[1], size);
+ atomic_set(&data_ready, 0);
+ mutex_unlock(&sense_data_mutex);
+
+ failure_count = 0;
+ return 0;
+}
+
+
+static void AKECS_Report_Value(short *rbuf)
+{
+ struct akm8973_data *data = i2c_get_clientdata(this_client);
+#if DEBUG
+ printk(KERN_INFO"AKECS_Report_Value: yaw = %d, pitch = %d, roll = %d\n", rbuf[0],
+ rbuf[1], rbuf[2]);
+ printk(KERN_INFO" tmp = %d, m_stat= %d, g_stat=%d\n", rbuf[3],
+ rbuf[4], rbuf[5]);
+ printk(KERN_INFO" G_Sensor: x = %d LSB, y = %d LSB, z = %d LSB\n",
+ rbuf[6], rbuf[7], rbuf[8]);
+#endif
+ /* Report magnetic sensor information */
+ if (atomic_read(&m_flag)) {
+ input_report_abs(data->input_dev, ABS_RX, rbuf[0]);
+ input_report_abs(data->input_dev, ABS_RY, rbuf[1]);
+ input_report_abs(data->input_dev, ABS_RZ, rbuf[2]);
+ input_report_abs(data->input_dev, ABS_RUDDER, rbuf[4]);
+ }
+
+ /* Report acceleration sensor information */
+ if (atomic_read(&a_flag)) {
+ input_report_abs(data->input_dev, ABS_X, rbuf[6]);
+ input_report_abs(data->input_dev, ABS_Y, rbuf[7]);
+ input_report_abs(data->input_dev, ABS_Z, rbuf[8]);
+ input_report_abs(data->input_dev, ABS_WHEEL, rbuf[5]);
+ }
+
+ /* Report temperature information */
+ if (atomic_read(&t_flag))
+ input_report_abs(data->input_dev, ABS_THROTTLE, rbuf[3]);
+
+ if (atomic_read(&mv_flag)) {
+ input_report_abs(data->input_dev, ABS_HAT0X, rbuf[9]);
+ input_report_abs(data->input_dev, ABS_HAT0Y, rbuf[10]);
+ input_report_abs(data->input_dev, ABS_BRAKE, rbuf[11]);
+ }
+
+ input_sync(data->input_dev);
+}
+
+static int AKECS_GetOpenStatus(void)
+{
+ wait_event_interruptible(open_wq, (atomic_read(&open_flag) != 0));
+ return atomic_read(&open_flag);
+}
+
+static int AKECS_GetCloseStatus(void)
+{
+ wait_event_interruptible(open_wq, (atomic_read(&open_flag) <= 0));
+ return atomic_read(&open_flag);
+}
+
+static void AKECS_CloseDone(void)
+{
+ atomic_set(&m_flag, 1);
+ atomic_set(&a_flag, 1);
+ atomic_set(&t_flag, 1);
+ atomic_set(&mv_flag, 1);
+}
+
+static int akm_aot_open(struct inode *inode, struct file *file)
+{
+ int ret = -1;
+ if (atomic_cmpxchg(&open_count, 0, 1) == 0) {
+ if (atomic_cmpxchg(&open_flag, 0, 1) == 0) {
+ atomic_set(&reserve_open_flag, 1);
+ wake_up(&open_wq);
+ ret = 0;
+ }
+ }
+ return ret;
+}
+
+static int akm_aot_release(struct inode *inode, struct file *file)
+{
+ atomic_set(&reserve_open_flag, 0);
+ atomic_set(&open_flag, 0);
+ atomic_set(&open_count, 0);
+ wake_up(&open_wq);
+ return 0;
+}
+
+static int
+akm_aot_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ short flag;
+
+ switch (cmd) {
+ case ECS_IOCTL_APP_SET_MFLAG:
+ case ECS_IOCTL_APP_SET_AFLAG:
+ case ECS_IOCTL_APP_SET_TFLAG:
+ case ECS_IOCTL_APP_SET_MVFLAG:
+ if (copy_from_user(&flag, argp, sizeof(flag)))
+ return -EFAULT;
+ if (flag < 0 || flag > 1)
+ return -EINVAL;
+ break;
+ case ECS_IOCTL_APP_SET_DELAY:
+ if (copy_from_user(&flag, argp, sizeof(flag)))
+ return -EFAULT;
+ break;
+ default:
+ break;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_APP_SET_MFLAG:
+ atomic_set(&m_flag, flag);
+ break;
+ case ECS_IOCTL_APP_GET_MFLAG:
+ flag = atomic_read(&m_flag);
+ break;
+ case ECS_IOCTL_APP_SET_AFLAG:
+ atomic_set(&a_flag, flag);
+ break;
+ case ECS_IOCTL_APP_GET_AFLAG:
+ flag = atomic_read(&a_flag);
+ break;
+ case ECS_IOCTL_APP_SET_TFLAG:
+ atomic_set(&t_flag, flag);
+ break;
+ case ECS_IOCTL_APP_GET_TFLAG:
+ flag = atomic_read(&t_flag);
+ break;
+ case ECS_IOCTL_APP_SET_MVFLAG:
+ atomic_set(&mv_flag, flag);
+ break;
+ case ECS_IOCTL_APP_GET_MVFLAG:
+ flag = atomic_read(&mv_flag);
+ break;
+ case ECS_IOCTL_APP_SET_DELAY:
+ akmd_delay = flag;
+ break;
+ case ECS_IOCTL_APP_GET_DELAY:
+ flag = akmd_delay;
+ break;
+ default:
+ return -ENOTTY;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_APP_GET_MFLAG:
+ case ECS_IOCTL_APP_GET_AFLAG:
+ case ECS_IOCTL_APP_GET_TFLAG:
+ case ECS_IOCTL_APP_GET_MVFLAG:
+ case ECS_IOCTL_APP_GET_DELAY:
+ if (copy_to_user(argp, &flag, sizeof(flag)))
+ return -EFAULT;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int akmd_open(struct inode *inode, struct file *file)
+{
+ return nonseekable_open(inode, file);
+}
+
+static int akmd_release(struct inode *inode, struct file *file)
+{
+ AKECS_CloseDone();
+ return 0;
+}
+
+static int
+akmd_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+
+ void __user *argp = (void __user *)arg;
+
+ char msg[RBUFF_SIZE + 1], rwbuf[5];
+ int ret = -1, status;
+ short mode, value[12], delay;
+
+ switch (cmd) {
+ case ECS_IOCTL_WRITE:
+ case ECS_IOCTL_READ:
+ if (copy_from_user(&rwbuf, argp, sizeof(rwbuf)))
+ return -EFAULT;
+ break;
+ case ECS_IOCTL_SET_MODE:
+ if (copy_from_user(&mode, argp, sizeof(mode)))
+ return -EFAULT;
+ break;
+ case ECS_IOCTL_SET_YPR:
+ if (copy_from_user(&value, argp, sizeof(value)))
+ return -EFAULT;
+ break;
+ default:
+ break;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_WRITE:
+ if (rwbuf[0] < 2)
+ return -EINVAL;
+ ret = AKI2C_TxData(&rwbuf[1], rwbuf[0]);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_READ:
+ if (rwbuf[0] < 1)
+ return -EINVAL;
+ ret = AKI2C_RxData(&rwbuf[1], rwbuf[0]);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_SET_MODE:
+ ret = AKECS_SetMode((char)mode);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_GETDATA:
+ ret = AKECS_TransRBuff(msg, RBUFF_SIZE);
+ if (ret < 0)
+ return ret;
+ break;
+ case ECS_IOCTL_SET_YPR:
+ AKECS_Report_Value(value);
+ break;
+ case ECS_IOCTL_GET_OPEN_STATUS:
+ status = AKECS_GetOpenStatus();
+ break;
+ case ECS_IOCTL_GET_CLOSE_STATUS:
+ status = AKECS_GetCloseStatus();
+ break;
+ case ECS_IOCTL_GET_DELAY:
+ delay = akmd_delay;
+ break;
+ default:
+ return -ENOTTY;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_READ:
+ if (copy_to_user(argp, &rwbuf, sizeof(rwbuf)))
+ return -EFAULT;
+ break;
+ case ECS_IOCTL_GETDATA:
+ if (copy_to_user(argp, &msg, sizeof(msg)))
+ return -EFAULT;
+ break;
+ case ECS_IOCTL_GET_OPEN_STATUS:
+ case ECS_IOCTL_GET_CLOSE_STATUS:
+ if (copy_to_user(argp, &status, sizeof(status)))
+ return -EFAULT;
+ break;
+ case ECS_IOCTL_GET_DELAY:
+ if (copy_to_user(argp, &delay, sizeof(delay)))
+ return -EFAULT;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static void akm_work_func(struct work_struct *work)
+{
+ if (AKECS_GetData() < 0)
+ printk(KERN_ERR "AKM8973 akm_work_func: Get data failed\n");
+ enable_irq(this_client->irq);
+}
+
+static irqreturn_t akm8973_interrupt(int irq, void *dev_id)
+{
+ struct akm8973_data *data = dev_id;
+ disable_irq(this_client->irq);
+ schedule_work(&data->work);
+ return IRQ_HANDLED;
+}
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void akm8973_early_suspend(struct early_suspend *handler)
+{
+ atomic_set(&suspend_flag, 1);
+ atomic_set(&reserve_open_flag, atomic_read(&open_flag));
+ atomic_set(&open_flag, 0);
+ wake_up(&open_wq);
+ disable_irq(this_client->irq);
+}
+
+static void akm8973_early_resume(struct early_suspend *handler)
+{
+ enable_irq(this_client->irq);
+ atomic_set(&suspend_flag, 0);
+ atomic_set(&open_flag, atomic_read(&reserve_open_flag));
+ wake_up(&open_wq);
+}
+#endif
+static struct file_operations akmd_fops = {
+ .owner = THIS_MODULE,
+ .open = akmd_open,
+ .release = akmd_release,
+ .ioctl = akmd_ioctl,
+};
+
+static struct file_operations akm_aot_fops = {
+ .owner = THIS_MODULE,
+ .open = akm_aot_open,
+ .release = akm_aot_release,
+ .ioctl = akm_aot_ioctl,
+};
+
+
+static struct miscdevice akm_aot_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "akm8973_aot",
+ .fops = &akm_aot_fops,
+};
+
+
+static struct miscdevice akmd_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "akm8973_daemon",
+ .fops = &akmd_fops,
+};
+
+static ssize_t compass_reset_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int val;
+
+ val = -1;
+ sscanf(buf, "%u", &val);
+ if (val != 1)
+ return -EINVAL;
+
+ return count;
+}
+
+static DEVICE_ATTR(reset, 0644, NULL, compass_reset_store);
+
+int akm8973_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct akm8973_data *akm;
+ int err = 0;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ err = -ENODEV;
+ goto exit_check_functionality_failed;
+ }
+
+ akm = kzalloc(sizeof(struct akm8973_data), GFP_KERNEL);
+ if (!akm) {
+ err = -ENOMEM;
+ goto exit_alloc_data_failed;
+ }
+
+ INIT_WORK(&akm->work, akm_work_func);
+ i2c_set_clientdata(client, akm);
+
+ this_client = client;
+
+ err = AKECS_PowerDown();
+ if (err < 0) {
+ printk(KERN_ERR"AKM8973 akm8973_probe: set power down mode error\n");
+ goto exit_set_mode_failed;
+ }
+
+ err = request_irq(client->irq, akm8973_interrupt, IRQF_TRIGGER_HIGH,
+ "akm8973", akm);
+
+ if (err < 0) {
+ printk(KERN_ERR"AKM8973 akm8973_probe: request irq failed\n");
+ goto exit_irq_request_failed;
+ }
+
+ akm->input_dev = input_allocate_device();
+
+ if (!akm->input_dev) {
+ err = -ENOMEM;
+ printk(KERN_ERR
+ "AKM8973 akm8973_probe: Failed to allocate input device\n");
+ goto exit_input_dev_alloc_failed;
+ }
+
+ set_bit(EV_ABS, akm->input_dev->evbit);
+ /* yaw */
+ input_set_abs_params(akm->input_dev, ABS_RX, 0, 360, 0, 0);
+ /* pitch */
+ input_set_abs_params(akm->input_dev, ABS_RY, -180, 180, 0, 0);
+ /* roll */
+ input_set_abs_params(akm->input_dev, ABS_RZ, -90, 90, 0, 0);
+ /* x-axis acceleration */
+ input_set_abs_params(akm->input_dev, ABS_X, -1872, 1872, 0, 0);
+ /* y-axis acceleration */
+ input_set_abs_params(akm->input_dev, ABS_Y, -1872, 1872, 0, 0);
+ /* z-axis acceleration */
+ input_set_abs_params(akm->input_dev, ABS_Z, -1872, 1872, 0, 0);
+ /* temparature */
+ input_set_abs_params(akm->input_dev, ABS_THROTTLE, -30, 85, 0, 0);
+ /* status of magnetic sensor */
+ input_set_abs_params(akm->input_dev, ABS_RUDDER, -32768, 3, 0, 0);
+ /* status of acceleration sensor */
+ input_set_abs_params(akm->input_dev, ABS_WHEEL, -32768, 3, 0, 0);
+ /* step count */
+ input_set_abs_params(akm->input_dev, ABS_GAS, 0, 65535, 0, 0);
+ /* x-axis of raw magnetic vector */
+ input_set_abs_params(akm->input_dev, ABS_HAT0X, -2048, 2032, 0, 0);
+ /* y-axis of raw magnetic vector */
+ input_set_abs_params(akm->input_dev, ABS_HAT0Y, -2048, 2032, 0, 0);
+ /* z-axis of raw magnetic vector */
+ input_set_abs_params(akm->input_dev, ABS_BRAKE, -2048, 2032, 0, 0);
+
+ akm->input_dev->name = "compass";
+
+ err = input_register_device(akm->input_dev);
+
+ if (err) {
+ printk(KERN_ERR
+ "AKM8973 akm8973_probe: Unable to register input device: %s\n",
+ akm->input_dev->name);
+ goto exit_input_register_device_failed;
+ }
+
+ err = misc_register(&akmd_device);
+ if (err) {
+ printk(KERN_ERR "AKM8973 akm8973_probe: akmd_device register failed\n");
+ goto exit_misc_device_register_failed;
+ }
+
+ err = misc_register(&akm_aot_device);
+ if (err) {
+ printk(KERN_ERR
+ "AKM8973 akm8973_probe: akm_aot_device register failed\n");
+ goto exit_misc_device_register_failed;
+ }
+
+ mutex_init(&sense_data_mutex);
+
+ init_waitqueue_head(&data_ready_wq);
+ init_waitqueue_head(&open_wq);
+
+ /* As default, report all information */
+ atomic_set(&m_flag, 1);
+ atomic_set(&a_flag, 1);
+ atomic_set(&t_flag, 1);
+ atomic_set(&mv_flag, 1);
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ akm->early_suspend_akm.suspend = akm8973_early_suspend;
+ akm->early_suspend_akm.resume = akm8973_early_resume;
+ register_early_suspend(&akm->early_suspend_akm);
+#endif
+ err = device_create_file(&client->dev, &dev_attr_reset);
+ if (err)
+ printk(KERN_ERR
+ "AKM8973 akm8973_probe: create dev_attr_reset failed\n");
+
+ return 0;
+
+exit_misc_device_register_failed:
+exit_input_register_device_failed:
+ input_free_device(akm->input_dev);
+exit_input_dev_alloc_failed:
+ free_irq(client->irq, akm);
+exit_irq_request_failed:
+exit_set_mode_failed:
+ kfree(akm);
+exit_alloc_data_failed:
+exit_check_functionality_failed:
+ return err;
+
+}
+
+static int akm8973_remove(struct i2c_client *client)
+{
+ struct akm8973_data *akm = i2c_get_clientdata(client);
+ free_irq(client->irq, akm);
+ input_unregister_device(akm->input_dev);
+ kfree(akm);
+ return 0;
+}
+static const struct i2c_device_id akm8973_id[] = {
+ { AKM8973_I2C_NAME, 0 },
+ { }
+};
+
+static struct i2c_driver akm8973_driver = {
+ .probe = akm8973_probe,
+ .remove = akm8973_remove,
+ .id_table = akm8973_id,
+ .driver = {
+ .name = AKM8973_I2C_NAME,
+ },
+};
+
+static int __init akm8973_init(void)
+{
+ printk(KERN_INFO "AKM8973 compass driver: init\n");
+ return i2c_add_driver(&akm8973_driver);
+}
+
+static void __exit akm8973_exit(void)
+{
+ i2c_del_driver(&akm8973_driver);
+}
+
+module_init(akm8973_init);
+module_exit(akm8973_exit);
+
+MODULE_AUTHOR("viral wang <viral_wang@htc.com>");
+MODULE_DESCRIPTION("AKM8973 compass driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Definitions for ak8973 compass chip.
+ */
+#ifndef AKM8973_H
+#define AKM8973_H
+
+#include <linux/ioctl.h>
+
+#define AKM8973_I2C_NAME "ak8973"
+
+/* Compass device dependent definition */
+#define AKECS_MODE_MEASURE 0x00 /* Starts measurement. Please use AKECS_MODE_MEASURE_SNG */
+ /* or AKECS_MODE_MEASURE_SEQ instead of this. */
+#define AKECS_MODE_E2P_READ 0x02 /* E2P access mode (read). */
+#define AKECS_MODE_POWERDOWN 0x03 /* Power down mode */
+
+#define RBUFF_SIZE 4 /* Rx buffer size */
+
+/* AK8973 register address */
+#define AKECS_REG_ST 0xC0
+#define AKECS_REG_TMPS 0xC1
+#define AKECS_REG_MS1 0xE0
+
+#define AKMIO 0xA1
+
+/* IOCTLs for AKM library */
+#define ECS_IOCTL_WRITE _IOW(AKMIO, 0x01, char[5])
+#define ECS_IOCTL_READ _IOWR(AKMIO, 0x02, char[5])
+#define ECS_IOCTL_RESET _IO(AKMIO, 0x03)
+#define ECS_IOCTL_SET_MODE _IOW(AKMIO, 0x04, short)
+#define ECS_IOCTL_GETDATA _IOR(AKMIO, 0x05, char[RBUFF_SIZE+1])
+#define ECS_IOCTL_SET_YPR _IOW(AKMIO, 0x06, short[12])
+#define ECS_IOCTL_GET_OPEN_STATUS _IOR(AKMIO, 0x07, int)
+#define ECS_IOCTL_GET_CLOSE_STATUS _IOR(AKMIO, 0x08, int)
+#define ECS_IOCTL_GET_DELAY _IOR(AKMIO, 0x30, short)
+
+/* IOCTLs for APPs */
+#define ECS_IOCTL_APP_SET_MODE _IOW(AKMIO, 0x10, short)
+#define ECS_IOCTL_APP_SET_MFLAG _IOW(AKMIO, 0x11, short)
+#define ECS_IOCTL_APP_GET_MFLAG _IOW(AKMIO, 0x12, short)
+#define ECS_IOCTL_APP_SET_AFLAG _IOW(AKMIO, 0x13, short)
+#define ECS_IOCTL_APP_GET_AFLAG _IOR(AKMIO, 0x14, short)
+#define ECS_IOCTL_APP_SET_TFLAG _IOR(AKMIO, 0x15, short)
+#define ECS_IOCTL_APP_GET_TFLAG _IOR(AKMIO, 0x16, short)
+#define ECS_IOCTL_APP_RESET_PEDOMETER _IO(AKMIO, 0x17)
+#define ECS_IOCTL_APP_SET_DELAY _IOW(AKMIO, 0x18, short)
+#define ECS_IOCTL_APP_GET_DELAY ECS_IOCTL_GET_DELAY
+#define ECS_IOCTL_APP_SET_MVFLAG _IOW(AKMIO, 0x19, short) /* Set raw magnetic vector flag */
+#define ECS_IOCTL_APP_GET_MVFLAG _IOR(AKMIO, 0x1A, short) /* Get raw magnetic vector flag */
+
+
+#endif
+
--- /dev/null
+/* drivers/i2c/chips/akm8975.c - akm8975 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.
+ *
+ */
+
+/*
+ * Revised by AKM 2009/04/02
+ *
+ */
+
+#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/earlysuspend.h>
+#include "ak8975.h"
+
+#define AKM8975_DEBUG 1
+#define AKM8975_DEBUG_MSG 1
+#define AKM8975_DEBUG_FUNC 0
+#define AKM8975_DEBUG_DATA 0
+#define MAX_FAILURE_COUNT 3
+#define AKM8975_RETRY_COUNT 10
+#define AKM8975_DEFAULT_DELAY 100
+
+#if AKM8975_DEBUG_MSG
+#define AKMDBG(format, ...) printk(KERN_INFO "AKM8975 " format "\n", ## __VA_ARGS__)
+#else
+#define AKMDBG(format, ...)
+#endif
+
+#if AKM8975_DEBUG_FUNC
+#define AKMFUNC(func) printk(KERN_INFO "AKM8975 " func " is called\n")
+#else
+#define AKMFUNC(func)
+#endif
+
+static struct i2c_client *this_client;
+
+struct akm8975_data {
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ struct work_struct work;
+ struct early_suspend akm_early_suspend;
+ int eoc_irq;
+};
+
+/* Addresses to scan -- protected by sense_data_mutex */
+static char sense_data[SENSOR_DATA_SIZE];
+static struct mutex sense_data_mutex;
+static DECLARE_WAIT_QUEUE_HEAD(data_ready_wq);
+static DECLARE_WAIT_QUEUE_HEAD(open_wq);
+
+static atomic_t data_ready;
+static atomic_t open_count;
+static atomic_t open_flag;
+static atomic_t reserve_open_flag;
+
+static atomic_t m_flag;
+static atomic_t a_flag;
+static atomic_t mv_flag;
+
+static int failure_count = 0;
+
+static short akmd_delay = AKM8975_DEFAULT_DELAY;
+
+static atomic_t suspend_flag = ATOMIC_INIT(0);
+
+//static struct akm8975_platform_data *pdata;
+
+static int AKI2C_RxData(char *rxData, int length)
+{
+ uint8_t loop_i;
+ struct i2c_msg msgs[] = {
+ {
+ .addr = this_client->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = rxData,
+ },
+ {
+ .addr = this_client->addr,
+ .flags = I2C_M_RD,
+ .len = length,
+ .buf = rxData,
+ },
+ };
+#if AKM8975_DEBUG_DATA
+ int i;
+ char addr = rxData[0];
+#endif
+#ifdef AKM8975_DEBUG
+ /* Caller should check parameter validity.*/
+ if ((rxData == NULL) || (length < 1)) {
+ return -EINVAL;
+ }
+#endif
+ for (loop_i = 0; loop_i < AKM8975_RETRY_COUNT; loop_i++) {
+ if (i2c_transfer(this_client->adapter, msgs, 2) > 0) {
+ break;
+ }
+ mdelay(10);
+ }
+
+ if (loop_i >= AKM8975_RETRY_COUNT) {
+ printk(KERN_ERR "%s retry over %d\n", __func__, AKM8975_RETRY_COUNT);
+ return -EIO;
+ }
+#if AKM8975_DEBUG_DATA
+ printk(KERN_INFO "RxData: len=%02x, addr=%02x\n data=", length, addr);
+ for (i = 0; i < length; i++) {
+ printk(KERN_INFO " %02x", rxData[i]);
+ }
+ printk(KERN_INFO "\n");
+#endif
+ return 0;
+}
+
+static int AKI2C_TxData(char *txData, int length)
+{
+ uint8_t loop_i;
+ struct i2c_msg msg[] = {
+ {
+ .addr = this_client->addr,
+ .flags = 0,
+ .len = length,
+ .buf = txData,
+ },
+ };
+#if AKM8975_DEBUG_DATA
+ int i;
+#endif
+#ifdef AKM8975_DEBUG
+ /* Caller should check parameter validity.*/
+ if ((txData == NULL) || (length < 2)) {
+ return -EINVAL;
+ }
+#endif
+ for (loop_i = 0; loop_i < AKM8975_RETRY_COUNT; loop_i++) {
+ if (i2c_transfer(this_client->adapter, msg, 1) > 0) {
+ break;
+ }
+ mdelay(10);
+ }
+
+ if (loop_i >= AKM8975_RETRY_COUNT) {
+ printk(KERN_ERR "%s retry over %d\n", __func__, AKM8975_RETRY_COUNT);
+ return -EIO;
+ }
+#if AKM8975_DEBUG_DATA
+ printk(KERN_INFO "TxData: len=%02x, addr=%02x\n data=", length, txData[0]);
+ for (i = 0; i < (length-1); i++) {
+ printk(KERN_INFO " %02x", txData[i + 1]);
+ }
+ printk(KERN_INFO "\n");
+#endif
+ return 0;
+}
+
+static int AKECS_SetMode_SngMeasure(void)
+{
+ char buffer[2];
+
+ atomic_set(&data_ready, 0);
+
+ /* Set measure mode */
+ buffer[0] = AK8975_REG_CNTL;
+ buffer[1] = AK8975_MODE_SNG_MEASURE;
+
+ /* Set data */
+ return AKI2C_TxData(buffer, 2);
+}
+
+static int AKECS_SetMode_SelfTest(void)
+{
+ char buffer[2];
+
+ /* Set measure mode */
+ buffer[0] = AK8975_REG_CNTL;
+ buffer[1] = AK8975_MODE_SELF_TEST;
+ /* Set data */
+ return AKI2C_TxData(buffer, 2);
+}
+
+static int AKECS_SetMode_FUSEAccess(void)
+{
+ char buffer[2];
+
+ /* Set measure mode */
+ buffer[0] = AK8975_REG_CNTL;
+ buffer[1] = AK8975_MODE_FUSE_ACCESS;
+ /* Set data */
+ return AKI2C_TxData(buffer, 2);
+}
+
+static int AKECS_SetMode_PowerDown(void)
+{
+ char buffer[2];
+
+ /* Set powerdown mode */
+ buffer[0] = AK8975_REG_CNTL;
+ buffer[1] = AK8975_MODE_POWERDOWN;
+ /* Set data */
+ return AKI2C_TxData(buffer, 2);
+}
+
+static int AKECS_SetMode(char mode)
+{
+ int ret;
+
+ switch (mode) {
+ case AK8975_MODE_SNG_MEASURE:
+ ret = AKECS_SetMode_SngMeasure();
+ break;
+ case AK8975_MODE_SELF_TEST:
+ ret = AKECS_SetMode_SelfTest();
+ break;
+ case AK8975_MODE_FUSE_ACCESS:
+ ret = AKECS_SetMode_FUSEAccess();
+ break;
+ case AK8975_MODE_POWERDOWN:
+ ret = AKECS_SetMode_PowerDown();
+ /* wait at least 100us after changing mode */
+ udelay(100);
+ break;
+ default:
+ AKMDBG("%s: Unknown mode(%d)", __func__, mode);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int AKECS_CheckDevice(void)
+{
+ char buffer[2];
+ int ret;
+
+ /* Set measure mode */
+ buffer[0] = AK8975_REG_WIA;
+
+ /* Read data */
+ ret = AKI2C_RxData(buffer, 1);
+ if (ret < 0) {
+ return ret;
+ }
+ /* Check read data */
+ if (buffer[0] != 0x48) {
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static int AKECS_GetData(char *rbuf, int size)
+{
+#ifdef AKM8975_DEBUG
+ /* This function is not exposed, so parameters
+ should be checked internally.*/
+ if ((rbuf == NULL) || (size < SENSOR_DATA_SIZE)) {
+ return -EINVAL;
+ }
+#endif
+ wait_event_interruptible_timeout(data_ready_wq,
+ atomic_read(&data_ready), 1000);
+ if (!atomic_read(&data_ready)) {
+ AKMDBG("%s: data_ready is not set.", __func__);
+ if (!atomic_read(&suspend_flag)) {
+ AKMDBG("%s: suspend_flag is not set.", __func__);
+ failure_count++;
+ if (failure_count >= MAX_FAILURE_COUNT) {
+ printk(KERN_ERR
+ "AKM8975 AKECS_GetData: successive %d failure.\n",
+ failure_count);
+ atomic_set(&open_flag, -1);
+ wake_up(&open_wq);
+ failure_count = 0;
+ }
+ }
+ return -1;
+ }
+
+ mutex_lock(&sense_data_mutex);
+ memcpy(rbuf, sense_data, size);
+ atomic_set(&data_ready, 0);
+ mutex_unlock(&sense_data_mutex);
+
+ failure_count = 0;
+ return 0;
+}
+
+static void AKECS_SetYPR(short *rbuf)
+{
+ struct akm8975_data *data = i2c_get_clientdata(this_client);
+#if AKM8975_DEBUG_DATA
+ printk(KERN_INFO "AKM8975 %s:\n", __func__);
+ printk(KERN_INFO " yaw =%6d, pitch =%6d, roll =%6d\n",
+ rbuf[0], rbuf[1], rbuf[2]);
+ printk(KERN_INFO " tmp =%6d, m_stat =%6d, g_stat =%6d\n",
+ rbuf[3], rbuf[4], rbuf[5]);
+ printk(KERN_INFO " Acceleration[LSB]: %6d,%6d,%6d\n",
+ rbuf[6], rbuf[7], rbuf[8]);
+ printk(KERN_INFO " Geomagnetism[LSB]: %6d,%6d,%6d\n",
+ rbuf[9], rbuf[10], rbuf[11]);
+#endif
+ /* Report magnetic sensor information */
+ if (atomic_read(&m_flag)) {
+ input_report_abs(data->input_dev, ABS_RX, rbuf[0]);
+ input_report_abs(data->input_dev, ABS_RY, rbuf[1]);
+ input_report_abs(data->input_dev, ABS_RZ, rbuf[2]);
+ input_report_abs(data->input_dev, ABS_RUDDER, rbuf[4]);
+ }
+
+ /* Report acceleration sensor information */
+ if (atomic_read(&a_flag)) {
+ input_report_abs(data->input_dev, ABS_X, rbuf[6]);
+ input_report_abs(data->input_dev, ABS_Y, rbuf[7]);
+ input_report_abs(data->input_dev, ABS_Z, rbuf[8]);
+ input_report_abs(data->input_dev, ABS_WHEEL, rbuf[5]);
+ }
+
+ /* Report magnetic vector information */
+ if (atomic_read(&mv_flag)) {
+ input_report_abs(data->input_dev, ABS_HAT0X, rbuf[9]);
+ input_report_abs(data->input_dev, ABS_HAT0Y, rbuf[10]);
+ input_report_abs(data->input_dev, ABS_BRAKE, rbuf[11]);
+ }
+
+ input_sync(data->input_dev);
+}
+
+static int AKECS_GetOpenStatus(void)
+{
+ wait_event_interruptible(open_wq, (atomic_read(&open_flag) != 0));
+ return atomic_read(&open_flag);
+}
+
+static int AKECS_GetCloseStatus(void)
+{
+ wait_event_interruptible(open_wq, (atomic_read(&open_flag) <= 0));
+ return atomic_read(&open_flag);
+}
+
+static void AKECS_CloseDone(void)
+{
+ atomic_set(&m_flag, 1);
+ atomic_set(&a_flag, 1);
+ atomic_set(&mv_flag, 1);
+}
+
+/***** akm_aot functions ***************************************/
+static int akm_aot_open(struct inode *inode, struct file *file)
+{
+ int ret = -1;
+
+ AKMFUNC("akm_aot_open");
+ if (atomic_cmpxchg(&open_count, 0, 1) == 0) {
+ if (atomic_cmpxchg(&open_flag, 0, 1) == 0) {
+ atomic_set(&reserve_open_flag, 1);
+ wake_up(&open_wq);
+ ret = 0;
+ }
+ }
+ return ret;
+}
+
+static int akm_aot_release(struct inode *inode, struct file *file)
+{
+ AKMFUNC("akm_aot_release");
+ atomic_set(&reserve_open_flag, 0);
+ atomic_set(&open_flag, 0);
+ atomic_set(&open_count, 0);
+ wake_up(&open_wq);
+ return 0;
+}
+
+static int
+akm_aot_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ short flag;
+
+ switch (cmd) {
+ case ECS_IOCTL_APP_SET_MFLAG:
+ case ECS_IOCTL_APP_SET_AFLAG:
+ case ECS_IOCTL_APP_SET_MVFLAG:
+ if (copy_from_user(&flag, argp, sizeof(flag))) {
+ return -EFAULT;
+ }
+ if (flag < 0 || flag > 1) {
+ return -EINVAL;
+ }
+ break;
+ case ECS_IOCTL_APP_SET_DELAY:
+ if (copy_from_user(&flag, argp, sizeof(flag))) {
+ return -EFAULT;
+ }
+ break;
+ default:
+ break;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_APP_SET_MFLAG:
+ atomic_set(&m_flag, flag);
+ AKMDBG("MFLAG is set to %d", flag);
+ break;
+ case ECS_IOCTL_APP_GET_MFLAG:
+ flag = atomic_read(&m_flag);
+ break;
+ case ECS_IOCTL_APP_SET_AFLAG:
+ atomic_set(&a_flag, flag);
+ AKMDBG("AFLAG is set to %d", flag);
+ break;
+ case ECS_IOCTL_APP_GET_AFLAG:
+ flag = atomic_read(&a_flag);
+ break;
+ case ECS_IOCTL_APP_SET_MVFLAG:
+ atomic_set(&mv_flag, flag);
+ AKMDBG("MVFLAG is set to %d", flag);
+ break;
+ case ECS_IOCTL_APP_GET_MVFLAG:
+ flag = atomic_read(&mv_flag);
+ break;
+ case ECS_IOCTL_APP_SET_DELAY:
+ akmd_delay = flag;
+ AKMDBG("Delay is set to %d", flag);
+ break;
+ case ECS_IOCTL_APP_GET_DELAY:
+ flag = akmd_delay;
+ break;
+ default:
+ return -ENOTTY;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_APP_GET_MFLAG:
+ case ECS_IOCTL_APP_GET_AFLAG:
+ case ECS_IOCTL_APP_GET_MVFLAG:
+ case ECS_IOCTL_APP_GET_DELAY:
+ if (copy_to_user(argp, &flag, sizeof(flag))) {
+ return -EFAULT;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/***** akmd functions ********************************************/
+static int akmd_open(struct inode *inode, struct file *file)
+{
+ AKMFUNC("akmd_open");
+ return nonseekable_open(inode, file);
+}
+
+static int akmd_release(struct inode *inode, struct file *file)
+{
+ AKMFUNC("akmd_release");
+ AKECS_CloseDone();
+ return 0;
+}
+
+static int
+akmd_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+
+ /* NOTE: In this function the size of "char" should be 1-byte. */
+ char sData[SENSOR_DATA_SIZE];/* for GETDATA */
+ char rwbuf[RWBUF_SIZE]; /* for READ/WRITE */
+ char mode; /* for SET_MODE*/
+ short value[12]; /* for SET_YPR */
+ short delay; /* for GET_DELAY */
+ int status; /* for OPEN/CLOSE_STATUS */
+ int ret = -1; /* Return value. */
+ /*AKMDBG("%s (0x%08X).", __func__, cmd);*/
+
+ switch (cmd) {
+ case ECS_IOCTL_WRITE:
+ case ECS_IOCTL_READ:
+ if (argp == NULL) {
+ AKMDBG("invalid argument.");
+ return -EINVAL;
+ }
+ if (copy_from_user(&rwbuf, argp, sizeof(rwbuf))) {
+ AKMDBG("copy_from_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_SET_MODE:
+ if (argp == NULL) {
+ AKMDBG("invalid argument.");
+ return -EINVAL;
+ }
+ if (copy_from_user(&mode, argp, sizeof(mode))) {
+ AKMDBG("copy_from_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_SET_YPR:
+ if (argp == NULL) {
+ AKMDBG("invalid argument.");
+ return -EINVAL;
+ }
+ if (copy_from_user(&value, argp, sizeof(value))) {
+ AKMDBG("copy_from_user failed.");
+ return -EFAULT;
+ }
+ break;
+ default:
+ break;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_WRITE:
+ AKMFUNC("IOCTL_WRITE");
+ if ((rwbuf[0] < 2) || (rwbuf[0] > (RWBUF_SIZE-1))) {
+ AKMDBG("invalid argument.");
+ return -EINVAL;
+ }
+ ret = AKI2C_TxData(&rwbuf[1], rwbuf[0]);
+ if (ret < 0) {
+ return ret;
+ }
+ break;
+ case ECS_IOCTL_READ:
+ AKMFUNC("IOCTL_READ");
+ if ((rwbuf[0] < 1) || (rwbuf[0] > (RWBUF_SIZE-1))) {
+ AKMDBG("invalid argument.");
+ return -EINVAL;
+ }
+ ret = AKI2C_RxData(&rwbuf[1], rwbuf[0]);
+ if (ret < 0) {
+ return ret;
+ }
+ break;
+ case ECS_IOCTL_SET_MODE:
+ AKMFUNC("IOCTL_SET_MODE");
+ ret = AKECS_SetMode(mode);
+ if (ret < 0) {
+ return ret;
+ }
+ break;
+ case ECS_IOCTL_GETDATA:
+ AKMFUNC("IOCTL_GET_DATA");
+ ret = AKECS_GetData(sData, SENSOR_DATA_SIZE);
+ if (ret < 0) {
+ return ret;
+ }
+ break;
+ case ECS_IOCTL_SET_YPR:
+ AKECS_SetYPR(value);
+ break;
+ case ECS_IOCTL_GET_OPEN_STATUS:
+ AKMFUNC("IOCTL_GET_OPEN_STATUS");
+ status = AKECS_GetOpenStatus();
+ AKMDBG("AKECS_GetOpenStatus returned (%d)", status);
+ break;
+ case ECS_IOCTL_GET_CLOSE_STATUS:
+ AKMFUNC("IOCTL_GET_CLOSE_STATUS");
+ status = AKECS_GetCloseStatus();
+ AKMDBG("AKECS_GetCloseStatus returned (%d)", status);
+ break;
+ case ECS_IOCTL_GET_DELAY:
+ AKMFUNC("IOCTL_GET_DELAY");
+ delay = akmd_delay;
+ break;
+ default:
+ return -ENOTTY;
+ }
+
+ switch (cmd) {
+ case ECS_IOCTL_READ:
+ if (copy_to_user(argp, &rwbuf, rwbuf[0]+1)) {
+ AKMDBG("copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_GETDATA:
+ if (copy_to_user(argp, &sData, sizeof(sData))) {
+ AKMDBG("copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_GET_OPEN_STATUS:
+ case ECS_IOCTL_GET_CLOSE_STATUS:
+ if (copy_to_user(argp, &status, sizeof(status))) {
+ AKMDBG("copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case ECS_IOCTL_GET_DELAY:
+ if (copy_to_user(argp, &delay, sizeof(delay))) {
+ AKMDBG("copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static void akm8975_work_func(struct work_struct *work)
+{
+ char buffer[SENSOR_DATA_SIZE];
+ int ret;
+
+ memset(buffer, 0, SENSOR_DATA_SIZE);
+ buffer[0] = AK8975_REG_ST1;
+ ret = AKI2C_RxData(buffer, SENSOR_DATA_SIZE);
+ if (ret < 0) {
+ printk(KERN_ERR "AKM8975 akm8975_work_func: I2C failed\n");
+ return;
+ }
+ /* Check ST bit */
+ if ((buffer[0] & 0x01) != 0x01) {
+ printk(KERN_ERR "AKM8975 akm8975_work_func: ST is not set\n");
+ return;
+ }
+
+ mutex_lock(&sense_data_mutex);
+ memcpy(sense_data, buffer, SENSOR_DATA_SIZE);
+ atomic_set(&data_ready, 1);
+ wake_up(&data_ready_wq);
+ mutex_unlock(&sense_data_mutex);
+
+ enable_irq(this_client->irq);
+
+ AKMFUNC("akm8975_work_func");
+}
+
+static irqreturn_t akm8975_interrupt(int irq, void *dev_id)
+{
+ struct akm8975_data *data = dev_id;
+ AKMFUNC("akm8975_interrupt");
+ disable_irq(this_client->irq);
+ schedule_work(&data->work);
+ return IRQ_HANDLED;
+}
+
+static void akm8975_early_suspend(struct early_suspend *handler)
+{
+ AKMFUNC("akm8975_early_suspend");
+ atomic_set(&suspend_flag, 1);
+ atomic_set(&reserve_open_flag, atomic_read(&open_flag));
+ atomic_set(&open_flag, 0);
+ wake_up(&open_wq);
+ disable_irq(this_client->irq);
+ AKMDBG("suspended with flag=%d",
+ atomic_read(&reserve_open_flag));
+}
+
+static void akm8975_early_resume(struct early_suspend *handler)
+{
+ AKMFUNC("akm8975_early_resume");
+ enable_irq(this_client->irq);
+ atomic_set(&suspend_flag, 0);
+ atomic_set(&open_flag, atomic_read(&reserve_open_flag));
+ wake_up(&open_wq);
+ AKMDBG("resumed with flag=%d",
+ atomic_read(&reserve_open_flag));
+}
+
+/*********************************************/
+static struct file_operations akmd_fops = {
+ .owner = THIS_MODULE,
+ .open = akmd_open,
+ .release = akmd_release,
+ .ioctl = akmd_ioctl,
+};
+
+static struct file_operations akm_aot_fops = {
+ .owner = THIS_MODULE,
+ .open = akm_aot_open,
+ .release = akm_aot_release,
+ .ioctl = akm_aot_ioctl,
+};
+
+static struct miscdevice akmd_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "akm8975_dev",
+ .fops = &akmd_fops,
+};
+
+static struct miscdevice akm_aot_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "akm8975_aot",
+ .fops = &akm_aot_fops,
+};
+
+/*********************************************/
+int akm8975_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct akm8975_data *akm;
+ int err = 0;
+
+ AKMFUNC("akm8975_probe");
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ printk(KERN_ERR "AKM8975 akm8975_probe: check_functionality failed.\n");
+ err = -ENODEV;
+ goto exit0;
+ }
+
+ /* Allocate memory for driver data */
+ akm = kzalloc(sizeof(struct akm8975_data), GFP_KERNEL);
+ if (!akm) {
+ printk(KERN_ERR "AKM8975 akm8975_probe: memory allocation failed.\n");
+ err = -ENOMEM;
+ goto exit1;
+ }
+
+ INIT_WORK(&akm->work, akm8975_work_func);
+ i2c_set_clientdata(client, akm);
+
+ this_client = client;
+
+ /* Check connection */
+ err = AKECS_CheckDevice();
+ if (err < 0) {
+ printk(KERN_ERR "AKM8975 akm8975_probe: set power down mode error\n");
+ goto exit3;
+ }
+ akm->eoc_irq = client->irq;
+ if (!akm->eoc_irq) {
+ dev_dbg(&akm->client->dev, "no IRQ?\n");
+ return -ENODEV;
+ }else{
+ akm->eoc_irq = gpio_to_irq(akm->eoc_irq);
+ }
+ err = gpio_request(client->irq, "ak_8975");
+ if (err < 0) {
+ dev_err(&client->dev, "failed to request GPIO, error %d\n", err);
+ goto exit3;
+ }
+ /* IRQ */
+ err = request_irq(akm->eoc_irq, akm8975_interrupt, IRQ_TYPE_EDGE_RISING,
+ "akm8975_DRDY", akm);
+ if (err < 0) {
+ printk(KERN_ERR "AKM8975 akm8975_probe: request irq failed\n");
+ goto exit4;
+ }
+
+ /* Declare input device */
+ akm->input_dev = input_allocate_device();
+ if (!akm->input_dev) {
+ err = -ENOMEM;
+ printk(KERN_ERR
+ "AKM8975 akm8975_probe: Failed to allocate input device\n");
+ goto exit5;
+ }
+ /* Setup input device */
+ set_bit(EV_ABS, akm->input_dev->evbit);
+ /* yaw (0, 360) */
+ input_set_abs_params(akm->input_dev, ABS_RX, 0, 23040, 0, 0);
+ /* pitch (-180, 180) */
+ input_set_abs_params(akm->input_dev, ABS_RY, -11520, 11520, 0, 0);
+ /* roll (-90, 90) */
+ input_set_abs_params(akm->input_dev, ABS_RZ, -5760, 5760, 0, 0);
+ /* x-axis acceleration (720 x 8G) */
+ input_set_abs_params(akm->input_dev, ABS_X, -5760, 5760, 0, 0);
+ /* y-axis acceleration (720 x 8G) */
+ input_set_abs_params(akm->input_dev, ABS_Y, -5760, 5760, 0, 0);
+ /* z-axis acceleration (720 x 8G) */
+ input_set_abs_params(akm->input_dev, ABS_Z, -5760, 5760, 0, 0);
+ /* temparature */
+ /*
+ input_set_abs_params(akm->input_dev, ABS_THROTTLE, -30, 85, 0, 0);
+ */
+ /* status of magnetic sensor */
+ input_set_abs_params(akm->input_dev, ABS_RUDDER, -32768, 3, 0, 0);
+ /* status of acceleration sensor */
+ input_set_abs_params(akm->input_dev, ABS_WHEEL, -32768, 3, 0, 0);
+ /* x-axis of raw magnetic vector (-4096, 4095) */
+ input_set_abs_params(akm->input_dev, ABS_HAT0X, -20480, 20479, 0, 0);
+ /* y-axis of raw magnetic vector (-4096, 4095) */
+ input_set_abs_params(akm->input_dev, ABS_HAT0Y, -20480, 20479, 0, 0);
+ /* z-axis of raw magnetic vector (-4096, 4095) */
+ input_set_abs_params(akm->input_dev, ABS_BRAKE, -20480, 20479, 0, 0);
+ /* Set name */
+ akm->input_dev->name = "compass";
+
+ /* Register */
+ err = input_register_device(akm->input_dev);
+ if (err) {
+ printk(KERN_ERR
+ "AKM8975 akm8975_probe: Unable to register input device\n");
+ goto exit6;
+ }
+
+ err = misc_register(&akmd_device);
+ if (err) {
+ printk(KERN_ERR
+ "AKM8975 akm8975_probe: akmd_device register failed\n");
+ goto exit7;
+ }
+
+ err = misc_register(&akm_aot_device);
+ if (err) {
+ printk(KERN_ERR
+ "AKM8975 akm8975_probe: akm_aot_device register failed\n");
+ goto exit8;
+ }
+
+ mutex_init(&sense_data_mutex);
+
+ init_waitqueue_head(&data_ready_wq);
+ init_waitqueue_head(&open_wq);
+
+ /* As default, report all information */
+ atomic_set(&m_flag, 1);
+ atomic_set(&a_flag, 1);
+ atomic_set(&mv_flag, 1);
+
+ akm->akm_early_suspend.suspend = akm8975_early_suspend;
+ akm->akm_early_suspend.resume = akm8975_early_resume;
+ register_early_suspend(&akm->akm_early_suspend);
+
+ AKMDBG("successfully probed.");
+ return 0;
+
+exit8:
+ misc_deregister(&akmd_device);
+exit7:
+ input_unregister_device(akm->input_dev);
+exit6:
+ input_free_device(akm->input_dev);
+exit5:
+ free_irq(client->irq, akm);
+exit4:
+exit3:
+ kfree(akm);
+exit1:
+exit0:
+ return err;
+
+}
+
+static int akm8975_remove(struct i2c_client *client)
+{
+ struct akm8975_data *akm = i2c_get_clientdata(client);
+ AKMFUNC("akm8975_remove");
+ unregister_early_suspend(&akm->akm_early_suspend);
+ misc_deregister(&akm_aot_device);
+ misc_deregister(&akmd_device);
+ input_unregister_device(akm->input_dev);
+ free_irq(client->irq, akm);
+ kfree(akm);
+ AKMDBG("successfully removed.");
+ return 0;
+}
+
+static const struct i2c_device_id akm8975_id[] = {
+ {AKM8975_I2C_NAME, 0 },
+ { }
+};
+
+static struct i2c_driver akm8975_driver = {
+ .probe = akm8975_probe,
+ .remove = akm8975_remove,
+ .id_table = akm8975_id,
+ .driver = {
+ .name = AKM8975_I2C_NAME,
+ },
+};
+
+static int __init akm8975_init(void)
+{
+ printk(KERN_INFO "AKM8975 compass driver: initialize\n");
+ return i2c_add_driver(&akm8975_driver);
+}
+
+static void __exit akm8975_exit(void)
+{
+ printk(KERN_INFO "AKM8975 compass driver: release\n");
+ i2c_del_driver(&akm8975_driver);
+}
+
+module_init(akm8975_init);
+module_exit(akm8975_exit);
+
+MODULE_AUTHOR("viral wang <viral_wang@htc.com>");
+MODULE_DESCRIPTION("AKM8975 compass driver");
+MODULE_LICENSE("GPL");
+
--- /dev/null
+/*
+ * Definitions for akm8975 compass chip.
+ */
+#ifndef AKM8975_H
+#define AKM8975_H
+
+#include <linux/ioctl.h>
+
+#define AKM8975_I2C_NAME "ak8975"
+
+/*! \name AK8975 operation mode
+ \anchor AK8975_Mode
+ Defines an operation mode of the AK8975.*/
+/*! @{*/
+#define AK8975_MODE_SNG_MEASURE 0x01
+#define AK8975_MODE_SELF_TEST 0x08
+#define AK8975_MODE_FUSE_ACCESS 0x0F
+#define AK8975_MODE_POWERDOWN 0x00
+/*! @}*/
+
+#define SENSOR_DATA_SIZE 8 /* Rx buffer size, i.e from ST1 to ST2 */
+#define RWBUF_SIZE 16 /* Read/Write buffer size.*/
+
+
+/*! \name AK8975 register address
+\anchor AK8975_REG
+Defines a register address of the AK8975.*/
+/*! @{*/
+#define AK8975_REG_WIA 0x00
+#define AK8975_REG_INFO 0x01
+#define AK8975_REG_ST1 0x02
+#define AK8975_REG_HXL 0x03
+#define AK8975_REG_HXH 0x04
+#define AK8975_REG_HYL 0x05
+#define AK8975_REG_HYH 0x06
+#define AK8975_REG_HZL 0x07
+#define AK8975_REG_HZH 0x08
+#define AK8975_REG_ST2 0x09
+#define AK8975_REG_CNTL 0x0A
+#define AK8975_REG_RSV 0x0B
+#define AK8975_REG_ASTC 0x0C
+#define AK8975_REG_TS1 0x0D
+#define AK8975_REG_TS2 0x0E
+#define AK8975_REG_I2CDIS 0x0F
+/*! @}*/
+
+/*! \name AK8975 fuse-rom address
+\anchor AK8975_FUSE
+Defines a read-only address of the fuse ROM of the AK8975.*/
+/*! @{*/
+#define AK8975_FUSE_ASAX 0x10
+#define AK8975_FUSE_ASAY 0x11
+#define AK8975_FUSE_ASAZ 0x12
+/*! @}*/
+
+#define AKMIO 0xA1
+
+/* IOCTLs for AKM library */
+#define ECS_IOCTL_WRITE _IOW(AKMIO, 0x01, char*)
+#define ECS_IOCTL_READ _IOWR(AKMIO, 0x02, char*)
+#define ECS_IOCTL_RESET _IO(AKMIO, 0x03) /* NOT used in AK8975 */
+#define ECS_IOCTL_SET_MODE _IOW(AKMIO, 0x04, short)
+#define ECS_IOCTL_GETDATA _IOR(AKMIO, 0x05, char[SENSOR_DATA_SIZE])
+#define ECS_IOCTL_SET_YPR _IOW(AKMIO, 0x06, short[12])
+#define ECS_IOCTL_GET_OPEN_STATUS _IOR(AKMIO, 0x07, int)
+#define ECS_IOCTL_GET_CLOSE_STATUS _IOR(AKMIO, 0x08, int)
+#define ECS_IOCTL_GET_DELAY _IOR(AKMIO, 0x30, short)
+#define ECS_IOCTL_GET_PROJECT_NAME _IOR(AKMIO, 0x0D, char[64])
+#define ECS_IOCTL_GET_MATRIX _IOR(AKMIO, 0x0E, short [4][3][3])
+
+/* IOCTLs for APPs */
+#define ECS_IOCTL_APP_SET_MODE _IOW(AKMIO, 0x10, short)
+#define ECS_IOCTL_APP_SET_MFLAG _IOW(AKMIO, 0x11, short)
+#define ECS_IOCTL_APP_GET_MFLAG _IOW(AKMIO, 0x12, short)
+#define ECS_IOCTL_APP_SET_AFLAG _IOW(AKMIO, 0x13, short)
+#define ECS_IOCTL_APP_GET_AFLAG _IOR(AKMIO, 0x14, short)
+#define ECS_IOCTL_APP_SET_TFLAG _IOR(AKMIO, 0x15, short)/* NOT use */
+#define ECS_IOCTL_APP_GET_TFLAG _IOR(AKMIO, 0x16, short)/* NOT use */
+#define ECS_IOCTL_APP_RESET_PEDOMETER _IO(AKMIO, 0x17) /* NOT use */
+#define ECS_IOCTL_APP_SET_DELAY _IOW(AKMIO, 0x18, short)
+#define ECS_IOCTL_APP_GET_DELAY ECS_IOCTL_GET_DELAY
+#define ECS_IOCTL_APP_SET_MVFLAG _IOW(AKMIO, 0x19, short)
+#define ECS_IOCTL_APP_GET_MVFLAG _IOR(AKMIO, 0x1A, short)
+
+#endif
+
--- /dev/null
+
+#include "../sysfs.h"
+
+/* Magnetometer types of attribute */
+
+#define IIO_DEV_ATTR_MAGN_X_OFFSET(_mode, _show, _store, _addr) \
+ IIO_DEVICE_ATTR(magn_x_offset, _mode, _show, _store, _addr)
+
+#define IIO_DEV_ATTR_MAGN_Y_OFFSET(_mode, _show, _store, _addr) \
+ IIO_DEVICE_ATTR(magn_y_offset, _mode, _show, _store, _addr)
+
+#define IIO_DEV_ATTR_MAGN_Z_OFFSET(_mode, _show, _store, _addr) \
+ IIO_DEVICE_ATTR(magn_z_offset, _mode, _show, _store, _addr)
+
+#define IIO_DEV_ATTR_MAGN_X_GAIN(_mode, _show, _store, _addr) \
+ IIO_DEVICE_ATTR(magn_x_gain, _mode, _show, _store, _addr)
+
+#define IIO_DEV_ATTR_MAGN_Y_GAIN(_mode, _show, _store, _addr) \
+ IIO_DEVICE_ATTR(magn_y_gain, _mode, _show, _store, _addr)
+
+#define IIO_DEV_ATTR_MAGN_Z_GAIN(_mode, _show, _store, _addr) \
+ IIO_DEVICE_ATTR(magn_z_gain, _mode, _show, _store, _addr)
+
+#define IIO_DEV_ATTR_MAGN_X(_show, _addr) \
+ IIO_DEVICE_ATTR(magn_x_raw, S_IRUGO, _show, NULL, _addr)
+
+#define IIO_DEV_ATTR_MAGN_Y(_show, _addr) \
+ IIO_DEVICE_ATTR(magn_y_raw, S_IRUGO, _show, NULL, _addr)
+
+#define IIO_DEV_ATTR_MAGN_Z(_show, _addr) \
+ IIO_DEVICE_ATTR(magn_z_raw, S_IRUGO, _show, NULL, _addr)
projects / firefly-linux-kernel-4.4.55.git / commitdiff