--- /dev/null
+/*
+ * Copyright (C) 2012-2013 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/pm.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/hwmon.h>
+#include <linux/input-polldev.h>
+#include <linux/miscdevice.h>
+#include <linux/poll.h>
+
+/*register define*/
+#define FXOS8700_STATUS 0x00
+#define FXOS8700_OUT_X_MSB 0x01
+#define FXOS8700_OUT_X_LSB 0x02
+#define FXOS8700_OUT_Y_MSB 0x03
+#define FXOS8700_OUT_Y_LSB 0x04
+#define FXOS8700_OUT_Z_MSB 0x05
+#define FXOS8700_OUT_Z_LSB 0x06
+#define FXOS8700_F_SETUP 0x09
+#define FXOS8700_TRIG_CFG 0x0a
+#define FXOS8700_SYSMOD 0x0B
+#define FXOS8700_INT_SOURCE 0x0c
+#define FXOS8700_WHO_AM_I 0x0d
+#define FXOS8700_XYZ_DATA_CFG 0x0e
+#define FXOS8700_HP_FILTER_CUTOFF 0x0f
+#define FXOS8700_PL_STATUS 0x10
+#define FXOS8700_PL_CFG 0x11
+#define FXOS8700_PL_COUNT 0x12
+#define FXOS8700_PL_BF_ZCOMP 0x13
+#define FXOS8700_PL_P_L_THS_REG 0x14
+#define FXOS8700_FFMT_CFG 0x15
+#define FXOS8700_FFMT_SRC 0x16
+#define FXOS8700_FFMT_THS 0x17
+#define FXOS8700_FFMT_COUNT 0x18
+#define FXOS8700_TRANSIDENT1_CFG 0x1d
+#define FXOS8700_TRANSIDENT1_SRC 0x1e
+#define FXOS8700_TRANSIDENT1_THS 0x1f
+#define FXOS8700_TRANSIDENT1_COUNT 0x20
+#define FXOS8700_PULSE_CFG 0x21
+#define FXOS8700_PULSE_SRC 0x22
+#define FXOS8700_PULSE_THSX 0x23
+#define FXOS8700_PULSE_THSY 0x24
+#define FXOS8700_PULSE_THSZ 0x25
+#define FXOS8700_PULSE_TMLT 0x26
+#define FXOS8700_PULSE_LTCY 0x27
+#define FXOS8700_PULSE_WIND 0x28
+#define FXOS8700_ATSLP_COUNT 0x29
+#define FXOS8700_CTRL_REG1 0x2a
+#define FXOS8700_CTRL_REG2 0x2b
+#define FXOS8700_CTRL_REG3 0x2c
+#define FXOS8700_CTRL_REG4 0x2d
+#define FXOS8700_CTRL_REG5 0x2e
+#define FXOS8700_OFF_X 0x2f
+#define FXOS8700_OFF_Y 0x30
+#define FXOS8700_OFF_Z 0x31
+#define FXOS8700_M_DR_STATUS 0x32
+#define FXOS8700_M_OUT_X_MSB 0x33
+#define FXOS8700_M_OUT_X_LSB 0x34
+#define FXOS8700_M_OUT_Y_MSB 0x35
+#define FXOS8700_M_OUT_Y_LSB 0x36
+#define FXOS8700_M_OUT_Z_MSB 0x37
+#define FXOS8700_M_OUT_Z_LSB 0x38
+#define FXOS8700_CMP_X_MSB 0x39
+#define FXOS8700_CMP_X_LSB 0x3a
+#define FXOS8700_CMP_Y_MSB 0x3b
+#define FXOS8700_CMP_Y_LSB 0x3c
+#define FXOS8700_CMP_Z_MSB 0x3d
+#define FXOS8700_CMP_Z_LSB 0x3e
+#define FXOS8700_M_OFF_X_MSB 0x3f
+#define FXOS8700_M_OFF_X_LSB 0x40
+#define FXOS8700_M_OFF_Y_MSB 0x41
+#define FXOS8700_M_OFF_Y_LSB 0x42
+#define FXOS8700_M_OFF_Z_MSB 0x43
+#define FXOS8700_M_OFF_Z_LSB 0x44
+#define FXOS8700_MAX_X_MSB 0x45
+#define FXOS8700_MAX_X_LSB 0x46
+#define FXOS8700_MAX_Y_MSB 0x47
+#define FXOS8700_MAX_Y_LSB 0x48
+#define FXOS8700_MAX_Z_MSB 0x49
+#define FXOS8700_MAX_Z_LSB 0x4a
+#define FXOS8700_MIN_X_MSB 0x4b
+#define FXOS8700_MIN_X_LSB 0x4c
+#define FXOS8700_MIN_Y_MSB 0x4d
+#define FXOS8700_MIN_Y_LSB 0x4e
+#define FXOS8700_MIN_Z_MSB 0x4f
+#define FXOS8700_MIN_Z_LSB 0x50
+#define FXOS8700_M_TEMP 0x51
+#define FXOS8700_MAG_THS_CFG 0x52
+#define FXOS8700_MAG_THS_SRC 0x53
+#define FXOS8700_MAG_THS_THS_X1 0x54
+#define FXOS8700_MAG_THS_THS_X0 0x55
+#define FXOS8700_MAG_THS_THS_Y1 0x56
+#define FXOS8700_MAG_THS_THS_Y0 0x57
+#define FXOS8700_MAG_THS_THS_Z1 0x58
+#define FXOS8700_MAG_THS_THS_Z0 0x59
+#define FXOS8700_MAG_THS_CUNT 0x5a
+#define FXOS8700_M_CTRL_REG1 0x5b
+#define FXOS8700_M_CTRL_REG2 0x5c
+#define FXOS8700_M_CTRL_REG3 0x5d
+#define FXOS8700_M_INT_SOURCE 0x5e
+#define FXOS8700_G_VECM_CFG 0x5f
+#define FXOS8700_G_VECM_THS_MSB 0x60
+#define FXOS8700_G_VECM_THS_LSB 0x61
+#define FXOS8700_G_VECM_CNT 0x62
+#define FXOS8700_G_VECM_INITX_MSB 0x63
+#define FXOS8700_G_VECM_INITX_LSB 0x64
+#define FXOS8700_G_VECM_INITY_MSB 0x65
+#define FXOS8700_G_VECM_INITY_LSB 0x66
+#define FXOS8700_G_VECM_INITZ_MSB 0x67
+#define FXOS8700_G_VECM_INITZ_LSB 0x68
+#define FXOS8700_M_VECM_CFG 0x69
+#define FXOS8700_M_VECM_THS_MSB 0x6a
+#define FXOS8700_M_VECM_THS_LSB 0x6b
+#define FXOS8700_M_VECM_CNT 0x6d
+#define FXOS8700_M_VECM_INITX_MSB 0x6d
+#define FXOS8700_M_VECM_INITX_LSB 0x6e
+#define FXOS8700_M_VECM_INITY_MSB 0x6f
+#define FXOS8700_M_VECM_INITY_LSB 0x70
+#define FXOS8700_M_VECM_INITZ_MSB 0x71
+#define FXOS8700_M_VECM_INITZ_LSB 0x72
+#define FXOS8700_G_FFMT_THS_X1 0x73
+#define FXOS8700_G_FFMT_THS_X0 0x74
+#define FXOS8700_G_FFMT_THS_Y1 0x75
+#define FXOS8700_G_FFMT_THS_Y0 0x76
+#define FXOS8700_G_FFMT_THS_Z1 0x77
+#define FXOS8700_G_FFMT_THS_Z0 0x78
+#define FXOS8700_G_TRAN_INIT_MSB 0x79
+#define FXOS8700_G_TRAN_INIT_LSB_X 0x7a
+#define FXOS8700_G_TRAN_INIT_LSB_Y 0x7b
+#define FXOS8700_G_TRAN_INIT_LSB_Z 0x7d
+#define FXOS8700_TM_NVM_LOCK 0x7e
+#define FXOS8700_NVM_DATA0_35 0x80
+#define FXOS8700_NVM_DATA_BNK3 0xa4
+#define FXOS8700_NVM_DATA_BNK2 0xa5
+#define FXOS8700_NVM_DATA_BNK1 0xa6
+#define FXOS8700_NVM_DATA_BNK0 0xa7
+
+#define SENSOR_IOCTL_BASE 'S'
+#define SENSOR_GET_MODEL_NAME _IOR(SENSOR_IOCTL_BASE, 0, char *)
+#define SENSOR_GET_POWER_STATUS _IOR(SENSOR_IOCTL_BASE, 2, int)
+#define SENSOR_SET_POWER_STATUS _IOR(SENSOR_IOCTL_BASE, 3, int)
+#define SENSOR_GET_DELAY_TIME _IOR(SENSOR_IOCTL_BASE, 4, int)
+#define SENSOR_SET_DELAY_TIME _IOR(SENSOR_IOCTL_BASE, 5, int)
+#define SENSOR_GET_RAW_DATA _IOR(SENSOR_IOCTL_BASE, 6, short[3])
+
+#define FXOS8700_I2C_ADDR 0x1E
+#define FXOS8700_DEVICE_ID 0xC7
+#define FXOS8700_PRE_DEVICE_ID 0xC4
+#define FXOS8700_DATA_BUF_SIZE 6
+#define FXOS8700_DELAY_DEFAULT 200 /* msecs */
+#define FXOS8700_POSITION_DEFAULT 1 /* msecs */
+
+#define FXOS8700_TYPE_ACC 0x00
+#define FXOS8700_TYPE_MAG 0x01
+#define FXOS8700_STANDBY 0x00
+#define FXOS8700_ACTIVED 0x01
+
+#define ABS_STATUS ABS_WHEEL
+#define FXOS8700_DRIVER "fxos8700"
+
+#define ABSMAX_ACC_VAL 0x01FF
+#define ABSMIN_ACC_VAL -(ABSMAX_ACC_VAL)
+#define FXOS8700_POLL_INTERVAL 400
+#define FXOS8700_POLL_MAX 800
+#define FXOS8700_POLL_MIN 100
+
+
+struct fxos8700_data_axis {
+ short x;
+ short y;
+ short z;
+};
+
+struct fxos8700_data {
+ struct i2c_client *client;
+ struct input_polled_dev *input_polled;
+ struct miscdevice *acc_miscdev;
+ struct miscdevice *mag_miscdev;
+ atomic_t acc_delay;
+ atomic_t mag_delay;
+ atomic_t acc_active;
+ atomic_t acc_active_poll;
+ atomic_t mag_active_poll;
+ atomic_t mag_active;
+ atomic_t position;
+};
+
+static struct fxos8700_data *g_fxos8700_data;
+static int fxos8700_position_settings[8][3][3] = {
+ { { 0, -1, 0}, { 1, 0, 0}, {0, 0, 1} },
+ { {-1, 0, 0}, { 0, -1, 0}, {0, 0, 1} },
+ { { 0, 1, 0}, {-1, 0, 0}, {0, 0, 1} },
+ { { 1, 0, 0}, { 0, 1, 0}, {0, 0, 1} },
+ { { 0, -1, 0}, {-1, 0, 0}, {0, 0, -1} },
+ { {-1, 0, 0}, { 0, 1, 0}, {0, 0, -1} },
+ { { 0, 1, 0}, { 1, 0, 0}, {0, 0, -1} },
+ { { 1, 0, 0}, { 0, -1, 0}, {0, 0, -1} },
+};
+
+static int fxos8700_data_convert(struct fxos8700_data_axis *axis_data, int position)
+{
+ short rawdata[3], data[3];
+ int i, j;
+ if (position < 0 || position > 7)
+ position = 0;
+ rawdata[0] = axis_data->x;
+ rawdata[1] = axis_data->y;
+ rawdata[2] = axis_data->z;
+ for (i = 0; i < 3 ; i++) {
+ data[i] = 0;
+ for (j = 0; j < 3; j++)
+ data[i] += rawdata[j] * fxos8700_position_settings[position][i][j];
+ }
+
+ axis_data->x = data[0];
+ axis_data->y = data[1];
+ axis_data->z = data[2];
+ return 0;
+}
+
+static int fxos8700_change_mode(struct i2c_client *client, int type, int active)
+{
+ u8 data;
+ int acc_act, mag_act;
+ struct fxos8700_data *pdata = i2c_get_clientdata(client);
+
+ acc_act = atomic_read(&pdata->acc_active);
+ mag_act = atomic_read(&pdata->mag_active);
+ data = i2c_smbus_read_byte_data(client, FXOS8700_CTRL_REG1);
+ if (type == FXOS8700_TYPE_ACC)
+ acc_act = active;
+ else
+ mag_act = active;
+ if (acc_act == FXOS8700_ACTIVED || mag_act == FXOS8700_ACTIVED)
+ data |= 0x01;
+ else
+ data &= ~0x01;
+ i2c_smbus_write_byte_data(client, FXOS8700_CTRL_REG1, data);
+
+ return 0;
+}
+
+static int fxos8700_set_odr(struct i2c_client *client, int type, int delay)
+{
+ return 0;
+}
+
+static int fxos8700_device_init(struct i2c_client *client)
+{
+ int result;
+ struct fxos8700_data *pdata = i2c_get_clientdata(client);
+
+ /* standby mode */
+ result = i2c_smbus_write_byte_data(client, FXOS8700_CTRL_REG1, 0x00);
+ if (result < 0)
+ goto out;
+ result = i2c_smbus_write_byte_data(client, FXOS8700_M_CTRL_REG1, 0x1F);
+ if (result < 0)
+ goto out;
+ result = i2c_smbus_write_byte_data(client, FXOS8700_M_CTRL_REG2, 0x5c);
+ if (result < 0)
+ goto out;
+ result = i2c_smbus_write_byte_data(client, FXOS8700_CTRL_REG1, 0x03 << 3);
+ if (result < 0)
+ goto out;
+
+ atomic_set(&pdata->acc_active, FXOS8700_STANDBY);
+ atomic_set(&pdata->mag_active, FXOS8700_STANDBY);
+ atomic_set(&pdata->position, FXOS8700_POSITION_DEFAULT);
+ return 0;
+out:
+ dev_err(&client->dev, "Error when init fxos8700 device:(%d)", result);
+ return result;
+}
+
+static int fxos8700_device_stop(struct i2c_client *client)
+{
+ i2c_smbus_write_byte_data(client, FXOS8700_CTRL_REG1, 0x00);
+ return 0;
+}
+
+static int
+fxos8700_read_data(struct i2c_client *client, struct fxos8700_data_axis *data, int type)
+{
+ u8 tmp_data[FXOS8700_DATA_BUF_SIZE];
+ int ret;
+ u8 reg;
+
+ if (type == FXOS8700_TYPE_ACC)
+ reg = FXOS8700_OUT_X_MSB;
+ else
+ reg = FXOS8700_M_OUT_X_MSB;
+
+ ret = i2c_smbus_read_i2c_block_data(client, reg, FXOS8700_DATA_BUF_SIZE, tmp_data);
+ if (ret < FXOS8700_DATA_BUF_SIZE) {
+ dev_err(&client->dev, "i2c block read %s failed\n",
+ (type == FXOS8700_TYPE_ACC ? "acc" : "mag"));
+ return -EIO;
+ }
+ data->x = ((tmp_data[0] << 8) & 0xff00) | tmp_data[1];
+ data->y = ((tmp_data[2] << 8) & 0xff00) | tmp_data[3];
+ data->z = ((tmp_data[4] << 8) & 0xff00) | tmp_data[5];
+ return 0;
+}
+
+static long fxos8700_acc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct fxos8700_data *pdata = file->private_data;
+ void __user *argp = (void __user *)arg;
+ struct fxos8700_data_axis data;
+ long ret = 0;
+ short sdata[3];
+ int enable;
+ int delay;
+ int position;
+
+ if (!pdata) {
+ printk(KERN_ERR "fxos8700 struct datt point is NULL.");
+ return -EFAULT;
+ }
+
+ switch (cmd) {
+ case SENSOR_GET_MODEL_NAME:
+ if (copy_to_user(argp, "FXOS8700 ACC", strlen("FXOS8700 ACC") + 1)) {
+ printk(KERN_ERR "SENSOR_GET_MODEL_NAME copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ break;
+ case SENSOR_GET_POWER_STATUS:
+ enable = atomic_read(&pdata->acc_active);
+ if (copy_to_user(argp, &enable, sizeof(int))) {
+ printk(KERN_ERR "SENSOR_SET_POWER_STATUS copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ break;
+ case SENSOR_SET_POWER_STATUS:
+ if (copy_from_user(&enable, argp, sizeof(int))) {
+ printk(KERN_ERR "SENSOR_SET_POWER_STATUS copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ if (pdata->client) {
+ ret = fxos8700_change_mode(pdata->client, FXOS8700_TYPE_ACC,
+ enable ? FXOS8700_ACTIVED : FXOS8700_STANDBY);
+ if (!ret)
+ atomic_set(&pdata->acc_active, enable);
+ }
+ break;
+ case SENSOR_GET_DELAY_TIME:
+ delay = atomic_read(&pdata->acc_delay);
+ if (copy_to_user(argp, &delay, sizeof(delay))) {
+ printk(KERN_ERR "SENSOR_GET_DELAY_TIME copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case SENSOR_SET_DELAY_TIME:
+ if (copy_from_user(&delay, argp, sizeof(int))) {
+ printk(KERN_ERR "SENSOR_SET_DELAY_TIME copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ if (pdata->client && delay > 0 && delay <= 500) {
+ ret = fxos8700_set_odr(pdata->client, FXOS8700_TYPE_ACC, delay);
+ if (!ret)
+ atomic_set(&pdata->acc_delay, delay);
+ }
+ break;
+ case SENSOR_GET_RAW_DATA:
+ position = atomic_read(&pdata->position);
+ ret = fxos8700_read_data(pdata->client, &data, FXOS8700_TYPE_ACC);
+ if (!ret) {
+ fxos8700_data_convert(&data, position);
+ sdata[0] = data.x;
+ sdata[1] = data.y;
+ sdata[2] = data.z;
+ if (copy_to_user(argp, sdata, sizeof(sdata))) {
+ printk(KERN_ERR "SENSOR_GET_RAW_DATA copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ }
+ break;
+ default:
+ ret = -1;
+ }
+ return ret;
+}
+
+static int fxos8700_acc_open(struct inode *inode, struct file *file)
+{
+ file->private_data = g_fxos8700_data;
+ return nonseekable_open(inode, file);
+}
+
+static int fxos8700_acc_release(struct inode *inode, struct file *file)
+{
+ /* note: releasing the wdt in NOWAYOUT-mode does not stop it */
+ return 0;
+}
+
+static const struct file_operations fxos8700_acc_fops = {
+ .owner = THIS_MODULE,
+ .open = fxos8700_acc_open,
+ .release = fxos8700_acc_release,
+ .unlocked_ioctl = fxos8700_acc_ioctl,
+};
+
+/* mag char miscdevice */
+static long fxos8700_mag_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct fxos8700_data *pdata = file->private_data;
+ void __user *argp = (void __user *)arg;
+ struct fxos8700_data_axis data;
+ long ret = 0;
+ short sdata[3];
+ int enable;
+ int delay;
+ int position;
+
+ if (!pdata) {
+ printk(KERN_ERR "fxos8700 struct datt point is NULL.");
+ return -EFAULT;
+ }
+
+ switch (cmd) {
+ case SENSOR_GET_MODEL_NAME:
+ if (copy_to_user(argp, "FXOS8700 MAG", strlen("FXOS8700 MAG") + 1)) {
+ printk(KERN_ERR "SENSOR_GET_MODEL_NAME copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ break;
+ case SENSOR_GET_POWER_STATUS:
+ enable = atomic_read(&pdata->mag_active);
+ if (copy_to_user(argp, &enable, sizeof(int))) {
+ printk(KERN_ERR "SENSOR_SET_POWER_STATUS copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ break;
+ case SENSOR_SET_POWER_STATUS:
+ if (copy_from_user(&enable, argp, sizeof(int))) {
+ printk(KERN_ERR "SENSOR_SET_POWER_STATUS copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ if (pdata->client) {
+ ret = fxos8700_change_mode(pdata->client, FXOS8700_TYPE_MAG,
+ enable ? FXOS8700_ACTIVED : FXOS8700_STANDBY);
+ if (!ret)
+ atomic_set(&pdata->mag_active, enable);
+ }
+ break;
+ case SENSOR_GET_DELAY_TIME:
+ delay = atomic_read(&pdata->mag_delay);
+ if (copy_to_user(argp, &delay, sizeof(delay))) {
+ printk(KERN_ERR "SENSOR_GET_DELAY_TIME copy_to_user failed.");
+ return -EFAULT;
+ }
+ break;
+ case SENSOR_SET_DELAY_TIME:
+ if (copy_from_user(&delay, argp, sizeof(int))) {
+ printk(KERN_ERR "SENSOR_SET_DELAY_TIME copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ if (pdata->client && delay > 0 && delay <= 500) {
+ ret = fxos8700_set_odr(pdata->client, FXOS8700_TYPE_MAG, delay);
+ if (!ret)
+ atomic_set(&pdata->mag_delay, delay);
+ }
+ break;
+ case SENSOR_GET_RAW_DATA:
+ position = atomic_read(&pdata->position);
+ ret = fxos8700_read_data(pdata->client, &data, FXOS8700_TYPE_MAG);
+ if (!ret) {
+ fxos8700_data_convert(&data, position);
+ sdata[0] = data.x;
+ sdata[1] = data.y;
+ sdata[2] = data.z;
+ if (copy_to_user(argp, sdata, sizeof(sdata))) {
+ printk(KERN_ERR "SENSOR_GET_RAW_DATA copy_to_user failed.");
+ ret = -EFAULT;
+ }
+ }
+ break;
+ default:
+ ret = -1;
+ }
+ return ret;
+}
+
+static int fxos8700_mag_open(struct inode *inode, struct file *file)
+{
+ file->private_data = g_fxos8700_data;
+ return nonseekable_open(inode, file);
+}
+
+static int fxos8700_mag_release(struct inode *inode, struct file *file)
+{
+ /* note: releasing the wdt in NOWAYOUT-mode does not stop it */
+ return 0;
+}
+
+static const struct file_operations fxos8700_mag_fops = {
+ .owner = THIS_MODULE,
+ .open = fxos8700_mag_open,
+ .release = fxos8700_mag_release,
+ .unlocked_ioctl = fxos8700_mag_ioctl,
+};
+
+static struct miscdevice fxos8700_acc_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "FreescaleAccelerometer",
+ .fops = &fxos8700_acc_fops,
+};
+
+static struct miscdevice fxos8700_mag_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "FreescaleMagnetometer",
+ .fops = &fxos8700_mag_fops,
+};
+
+static ssize_t fxos8700_enable_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct miscdevice *misc_dev = dev_get_drvdata(dev);
+ struct fxos8700_data *pdata = g_fxos8700_data;
+ int enable = 0;
+
+ if (pdata->acc_miscdev == misc_dev)
+ enable = atomic_read(&pdata->acc_active);
+ if (pdata->mag_miscdev == misc_dev)
+ enable = atomic_read(&pdata->mag_active);
+
+ return sprintf(buf, "%d\n", enable);
+}
+
+static ssize_t fxos8700_enable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct miscdevice *misc_dev = dev_get_drvdata(dev);
+ struct fxos8700_data *pdata = g_fxos8700_data;
+ struct i2c_client *client = pdata->client;
+ unsigned long enable;
+ int type;
+ int ret;
+
+ if (kstrtoul(buf, 10, &enable) < 0)
+ return -EINVAL;
+
+ if (misc_dev == pdata->acc_miscdev)
+ type = FXOS8700_TYPE_ACC;
+ if (misc_dev == pdata->mag_miscdev)
+ type = FXOS8700_TYPE_MAG;
+ enable = (enable > 0 ? FXOS8700_ACTIVED : FXOS8700_STANDBY);
+ ret = fxos8700_change_mode(client, type, enable);
+ if (!ret) {
+ if (type == FXOS8700_TYPE_ACC) {
+ atomic_set(&pdata->acc_active, enable);
+ atomic_set(&pdata->acc_active_poll, enable);
+ } else {
+ atomic_set(&pdata->mag_active, enable);
+ atomic_set(&pdata->mag_active_poll, enable);
+ }
+ }
+ return count;
+}
+
+static ssize_t fxos8700_poll_delay_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct miscdevice *misc_dev = dev_get_drvdata(dev);
+ struct fxos8700_data *pdata = g_fxos8700_data;
+ int poll_delay = 0;
+
+ if (pdata->acc_miscdev == misc_dev)
+ poll_delay = atomic_read(&pdata->acc_delay);
+ if (pdata->mag_miscdev == misc_dev)
+ poll_delay = atomic_read(&pdata->mag_delay);
+
+ return sprintf(buf, "%d\n", poll_delay);
+}
+
+
+static ssize_t fxos8700_poll_delay_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct miscdevice *misc_dev = dev_get_drvdata(dev);
+ struct fxos8700_data *pdata = g_fxos8700_data;
+ struct i2c_client *client = pdata->client;
+ unsigned long delay;
+ int type;
+ int ret;
+
+ if (kstrtoul(buf, 10, &delay) < 0)
+ return -EINVAL;
+
+ if (misc_dev == pdata->acc_miscdev)
+ type = FXOS8700_TYPE_ACC;
+ if (misc_dev == pdata->mag_miscdev)
+ type = FXOS8700_TYPE_MAG;
+ ret = fxos8700_set_odr(client, type, delay);
+ if (!ret) {
+ if (type == FXOS8700_TYPE_ACC)
+ atomic_set(&pdata->acc_delay, delay);
+ else
+ atomic_set(&pdata->mag_delay, delay);
+ }
+ return count;
+}
+
+static ssize_t fxos8700_position_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fxos8700_data *pdata = g_fxos8700_data;
+ unsigned long position = atomic_read(&pdata->position);
+
+ return sprintf(buf, "%ld\n", position);
+}
+
+static ssize_t fxos8700_position_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned long position;
+ struct fxos8700_data *pdata = g_fxos8700_data;
+
+ if (kstrtoul(buf, 10, &position) < 0)
+ return -EINVAL;
+
+ atomic_set(&pdata->position, position);
+ return count;
+}
+
+static DEVICE_ATTR(enable, S_IWUSR | S_IRUGO, fxos8700_enable_show, fxos8700_enable_store);
+static DEVICE_ATTR(poll_delay, S_IWUSR | S_IRUGO, fxos8700_poll_delay_show, fxos8700_poll_delay_store);
+static DEVICE_ATTR(position, S_IWUSR | S_IRUGO, fxos8700_position_show, fxos8700_position_store);
+
+static struct attribute *fxos8700_attributes[] = {
+ &dev_attr_enable.attr,
+ &dev_attr_poll_delay.attr,
+ &dev_attr_position.attr,
+ NULL
+};
+
+static const struct attribute_group fxos8700_attr_group = {
+ .attrs = fxos8700_attributes,
+};
+
+static int fxos8700_register_sysfs_device(struct fxos8700_data *pdata)
+{
+ struct miscdevice *misc_dev = NULL;
+ int err = -1;
+
+ /* register sysfs for acc */
+ misc_dev = pdata->acc_miscdev;
+ err = sysfs_create_group(&misc_dev->this_device->kobj, &fxos8700_attr_group);
+ if (err)
+ goto out;
+
+ /* register sysfs for mag */
+ misc_dev = pdata->mag_miscdev;
+ err = sysfs_create_group(&misc_dev->this_device->kobj, &fxos8700_attr_group);
+ if (err)
+ goto err_register_sysfs;
+ return 0;
+err_register_sysfs:
+ misc_dev = pdata->acc_miscdev;
+ sysfs_remove_group(&misc_dev->this_device->kobj, &fxos8700_attr_group);
+ printk("reigster mag sysfs error\n");
+out:
+ printk("reigster acc sysfs error\n");
+ return err;
+}
+
+static int fxos8700_unregister_sysfs_device(struct fxos8700_data *pdata)
+{
+ struct miscdevice *misc_dev;
+ misc_dev = pdata->acc_miscdev;
+ sysfs_remove_group(&misc_dev->this_device->kobj, &fxos8700_attr_group);
+
+ misc_dev = pdata->mag_miscdev;
+ sysfs_remove_group(&misc_dev->this_device->kobj, &fxos8700_attr_group);
+ return 0;
+}
+
+static void fxos8700_report(struct input_polled_dev *dev, int type)
+{
+ struct fxos8700_data_axis data;
+ struct fxos8700_data *pdata = g_fxos8700_data;
+ struct input_dev *idev = pdata->input_polled->input;
+ int position;
+ int ret;
+
+ position = atomic_read(&pdata->position);
+ ret = fxos8700_read_data(pdata->client, &data, type);
+ if (!ret) {
+ fxos8700_data_convert(&data, position);
+ input_report_abs(idev, ABS_X, data.x);
+ input_report_abs(idev, ABS_Y, data.y);
+ input_report_abs(idev, ABS_Z, data.z);
+ input_sync(idev);
+ }
+}
+
+static void fxos8700_poll(struct input_polled_dev *dev)
+{
+ struct fxos8700_data *pdata = g_fxos8700_data;
+ int type;
+
+ if (!(atomic_read(&pdata->acc_active_poll) ||
+ atomic_read(&pdata->mag_active_poll)))
+ return;
+
+ if (atomic_read(&pdata->acc_active_poll))
+ type = FXOS8700_TYPE_ACC;
+ if (atomic_read(&pdata->mag_active_poll))
+ type =FXOS8700_TYPE_MAG;
+ fxos8700_report(dev, type);
+}
+
+static int fxo8700_register_polled_device(struct fxos8700_data *pdata)
+{
+ struct input_polled_dev *ipoll_dev;
+ struct input_dev *idev;
+ int error;
+
+ ipoll_dev = input_allocate_polled_device();
+ if (!ipoll_dev)
+ return -ENOMEM;
+
+ ipoll_dev->private = pdata;
+ ipoll_dev->poll = fxos8700_poll;
+ ipoll_dev->poll_interval = FXOS8700_POLL_INTERVAL;
+ ipoll_dev->poll_interval_min = FXOS8700_POLL_MIN;
+ ipoll_dev->poll_interval_max = FXOS8700_POLL_MAX;
+ idev = ipoll_dev->input;
+ idev->name = FXOS8700_DRIVER;
+ idev->id.bustype = BUS_I2C;
+ idev->dev.parent = &pdata->client->dev;
+
+ idev->evbit[0] = BIT_MASK(EV_ABS);
+ input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
+ input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
+ input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
+
+ error = input_register_polled_device(ipoll_dev);
+ if (error) {
+ input_free_polled_device(ipoll_dev);
+ return error;
+ }
+
+ pdata->input_polled = ipoll_dev;
+
+ return 0;
+}
+
+static int fxos8700_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int result, client_id;
+ struct fxos8700_data *pdata;
+ struct i2c_adapter *adapter;
+
+ adapter = to_i2c_adapter(client->dev.parent);
+ result = i2c_check_functionality(adapter,
+ I2C_FUNC_SMBUS_BYTE |
+ I2C_FUNC_SMBUS_BYTE_DATA);
+ if (!result)
+ goto err_out;
+
+ client_id = i2c_smbus_read_byte_data(client, FXOS8700_WHO_AM_I);
+ if (client_id != FXOS8700_DEVICE_ID && client_id != FXOS8700_PRE_DEVICE_ID) {
+ dev_err(&client->dev,
+ "read chip ID 0x%x is not equal to 0x%x or 0x%x\n",
+ result, FXOS8700_DEVICE_ID, FXOS8700_PRE_DEVICE_ID);
+ result = -EINVAL;
+ goto err_out;
+ }
+ pdata = kzalloc(sizeof(struct fxos8700_data), GFP_KERNEL);
+ if (!pdata) {
+ result = -ENOMEM;
+ dev_err(&client->dev, "alloc data memory error!\n");
+ goto err_out;
+ }
+ g_fxos8700_data = pdata;
+ pdata->client = client;
+ atomic_set(&pdata->acc_delay, FXOS8700_DELAY_DEFAULT);
+ atomic_set(&pdata->mag_delay, FXOS8700_DELAY_DEFAULT);
+ i2c_set_clientdata(client, pdata);
+
+ result = misc_register(&fxos8700_acc_device);
+ if (result != 0) {
+ printk(KERN_ERR "register acc miscdevice error");
+ goto err_regsiter_acc_misc;
+ }
+ pdata->acc_miscdev = &fxos8700_acc_device;
+
+ result = misc_register(&fxos8700_mag_device);
+ if (result != 0) {
+ printk(KERN_ERR "register acc miscdevice error");
+ goto err_regsiter_mag_misc;
+ }
+ pdata->mag_miscdev = &fxos8700_mag_device;
+
+ /* for debug */
+ if (client->irq <= 0) {
+ result = fxo8700_register_polled_device(g_fxos8700_data);
+ if (result)
+ dev_err(&client->dev,
+ "IRQ GPIO conf. error %d, error %d\n",
+ client->irq, result);
+ }
+
+ result = fxos8700_register_sysfs_device(pdata);
+ if (result) {
+ dev_err(&client->dev, "create device file failed!\n");
+ result = -EINVAL;
+ goto err_register_sys;
+ }
+ fxos8700_device_init(client);
+ printk("fxos8700 device driver probe successfully");
+ return 0;
+err_register_sys:
+ misc_deregister(&fxos8700_mag_device);
+ pdata->mag_miscdev = NULL;
+err_regsiter_mag_misc:
+ misc_deregister(&fxos8700_acc_device);
+ pdata->acc_miscdev = NULL;
+err_regsiter_acc_misc:
+ i2c_set_clientdata(client, NULL);
+ kfree(pdata);
+err_out:
+ return result;
+}
+
+static int fxos8700_remove(struct i2c_client *client)
+{
+ struct fxos8700_data *pdata = i2c_get_clientdata(client);
+ if (!pdata)
+ return 0;
+ fxos8700_device_stop(client);
+ if (client->irq <= 0) {
+ input_unregister_polled_device(pdata->input_polled);
+ input_free_polled_device(pdata->input_polled);
+ }
+ fxos8700_unregister_sysfs_device(pdata);
+ misc_deregister(&fxos8700_acc_device);
+ misc_deregister(&fxos8700_mag_device);
+ kfree(pdata);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int fxos8700_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct fxos8700_data *pdata = i2c_get_clientdata(client);
+ if (atomic_read(&pdata->acc_active) || atomic_read(&pdata->mag_active))
+ fxos8700_device_stop(client);
+ return 0;
+}
+
+static int fxos8700_resume(struct device *dev)
+{
+ int ret = 0;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct fxos8700_data *pdata = i2c_get_clientdata(client);
+ if (atomic_read(&pdata->acc_active))
+ fxos8700_change_mode(client, FXOS8700_TYPE_ACC, FXOS8700_ACTIVED);
+ if (atomic_read(&pdata->mag_active))
+ fxos8700_change_mode(client, FXOS8700_TYPE_MAG, FXOS8700_ACTIVED);
+ return ret;
+}
+#endif
+
+static const struct i2c_device_id fxos8700_id[] = {
+ {"fxos8700", 0},
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, fxos8700_id);
+
+static SIMPLE_DEV_PM_OPS(fxos8700_pm_ops, fxos8700_suspend, fxos8700_resume);
+static struct i2c_driver fxos8700_driver = {
+ .driver = {
+ .name = FXOS8700_DRIVER,
+ .owner = THIS_MODULE,
+ .pm = &fxos8700_pm_ops,
+ },
+ .probe = fxos8700_probe,
+ .remove = fxos8700_remove,
+ .id_table = fxos8700_id,
+};
+
+module_i2c_driver(fxos8700_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("FXOS8700 6-Axis Acc and Mag Combo Sensor driver");
+MODULE_LICENSE("GPL");
projects / linux.git / commitdiff