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remove old compass driver dir

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This commit is contained in:
lyx
2011-03-25 19:20:04 -07:00
parent 6917f96fcc
commit 5451785179
7 changed files with 0 additions and 1860 deletions
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24
drivers/staging/iio/magnetometer/Kconfig
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@@ -1,24 +0,0 @@
#
# 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.

5
drivers/staging/iio/magnetometer/Makefile
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@@ -1,5 +0,0 @@
#
# Makefile for industrial I/O Magnetometer sensors
#
obj-$(CONFIG_SENSORS_AK8975) := ak8975.o
obj-$(CONFIG_SENSORS_AK8973) := ak8973.o

751
drivers/staging/iio/magnetometer/ak8973.c
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@@ -1,751 +0,0 @@
/*
* 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");

53
drivers/staging/iio/magnetometer/ak8973.h
View File

@@ -1,53 +0,0 @@
/*
* 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

910
drivers/staging/iio/magnetometer/ak8975.c
View File

@@ -1,910 +0,0 @@
/* 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");

86
drivers/staging/iio/magnetometer/ak8975.h
View File

@@ -1,86 +0,0 @@
/*
* 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

31
drivers/staging/iio/magnetometer/magnet.h
View File

@@ -1,31 +0,0 @@
#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)