+++ /dev/null
-#
-# Magnetometer sensors
-#
-
-comment "Magnetometer sensors"
-#config SENSORS_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 SENSORS_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-$(CONFIG_SENSORS_AK8975) := ak8975.o
-obj-$(CONFIG_SENSORS_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