Add STMicroelectronics LIS331DLH digital accelerometer device driver
Signed-off-by: Carmine Iascone <carmine.iascone@xxxxxx>
---
drivers/input/misc/Kconfig | 7 +
drivers/input/misc/Makefile | 2 +-
drivers/input/misc/lis331dlh.c | 836 ++++++++++++++++++++++++++++++++++++++++
drivers/input/misc/lis331dlh.h | 83 ++++
4 files changed, 927 insertions(+), 1 deletions(-)
create mode 100644 drivers/input/misc/lis331dlh.c
create mode 100644 drivers/input/misc/lis331dlh.h
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index b99b8cb..eb58bd3 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -448,4 +448,11 @@ config INPUT_ADXL34X_SPI
To compile this driver as a module, choose M here: the
module will be called adxl34x-spi.
+config INPUT_LIS331DLH
+ tristate "STMicroelectronics LIS331DLH Accelerometer"
+ depends on I2C
+ ---help---
+ If you say yes here you get support for the STMicroelectronics
+ LIS331DLH accelerometer sensor
+
endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 1fe1f6c..819e1a3 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
obj-$(CONFIG_INPUT_IXP4XX_BEEPER) += ixp4xx-beeper.o
obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o
+obj-$(CONFIG_INPUT_LIS331DLH) += lis331dlh.o
obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o
obj-$(CONFIG_INPUT_MAX8925_ONKEY) += max8925_onkey.o
obj-$(CONFIG_INPUT_PCAP) += pcap_keys.o
@@ -42,4 +43,3 @@ obj-$(CONFIG_INPUT_WINBOND_CIR) += winbond-cir.o
obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o
obj-$(CONFIG_INPUT_YEALINK) += yealink.o
-
diff --git a/drivers/input/misc/lis331dlh.c b/drivers/input/misc/lis331dlh.c
new file mode 100644
index 0000000..2b72c12
--- /dev/null
+++ b/drivers/input/misc/lis331dlh.c
@@ -0,0 +1,836 @@
+/******************** (C) COPYRIGHT 2010 STMicroelectronics ********************
+*
+* File Name : lis331dlh.c
+* Authors : MSH - Motion Mems BU - Application Team
+* : Carmine Iascone (carmine.iascone@xxxxxx)
+* : Matteo Dameno (matteo.dameno@xxxxxx)
+* Version : V 1.0.0
+* Date : 08/11/2010
+* Description : LIS331DLH sensor API
+*
+********************************************************************************
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License version 2 as
+* published by the Free Software Foundation.
+*
+* THE PRESENT SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES
+* OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, FOR THE SOLE
+* PURPOSE TO SUPPORT YOUR APPLICATION DEVELOPMENT.
+* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
+* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
+* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
+* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+*
+* THIS SOFTWARE IS SPECIFICALLY DESIGNED FOR EXCLUSIVE USE WITH ST PARTS.
+*
+******************************************************************************/
+#include "lis331dlh.h"
+
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/input-polldev.h>
+#include <linux/slab.h>
+
+
+#define LIS331DLH_DEV_NAME "lis331dlh"
+
+/** Maximum polled-device-reported g value */
+#define G_MAX 8000
+
+#define SHIFT_ADJ_2G 4
+#define SHIFT_ADJ_4G 3
+#define SHIFT_ADJ_8G 2
+
+#define AXISDATA_REG 0x28
+
+/* ctrl 1: pm2 pm1 pm0 dr1 dr0 zenable yenable zenable */
+#define CTRL_REG1 0x20 /* power control reg */
+#define CTRL_REG2 0x21 /* power control reg */
+#define CTRL_REG3 0x22 /* power control reg */
+#define CTRL_REG4 0x23 /* interrupt control reg */
+
+#define FUZZ 0
+#define FLAT 0
+#define I2C_RETRY_DELAY 5
+#define I2C_RETRIES 5
+#define AUTO_INCREMENT 0x80
+
+static struct {
+ unsigned int cutoff;
+ unsigned int mask;
+} odr_table[] = {
+ {
+ 3, LIS331DLH_PM_NORMAL | LIS331DLH_ODR1000}, {
+ 10, LIS331DLH_PM_NORMAL | LIS331DLH_ODR400}, {
+ 20, LIS331DLH_PM_NORMAL | LIS331DLH_ODR100}, {
+ 100, LIS331DLH_PM_NORMAL | LIS331DLH_ODR50}, {
+ 200, LIS331DLH_ODR1000 | LIS331DLH_ODR10}, {
+ 500, LIS331DLH_ODR1000 | LIS331DLH_ODR5}, {
+ 1000, LIS331DLH_ODR1000 | LIS331DLH_ODR2}, {
+ 2000, LIS331DLH_ODR1000 | LIS331DLH_ODR1}, {
+ 0, LIS331DLH_ODR1000 | LIS331DLH_ODRHALF},};
+
+struct lis331dlh_data {
+ struct i2c_client *client;
+ struct lis331dlh_platform_data *pdata;
+
+ struct mutex lock;
+
+ struct input_polled_dev *input_poll_dev;
+
+ int hw_initialized;
+ atomic_t enabled;
+ int on_before_suspend;
+
+ u8 reg_addr;
+
+ u8 shift_adj;
+ u8 resume_state[5];
+};
+
+/*
+ * Because misc devices can not carry a pointer from driver register to
+ * open, we keep this global. This limits the driver to a single instance.
+ */
+struct lis331dlh_data *lis331dlh_misc_data;
+
+static int lis331dlh_i2c_read(struct lis331dlh_data *acc,
+ u8 *buf, int len)
+{
+ int err;
+
+ struct i2c_msg msgs[] = {
+ {
+ .addr = acc->client->addr,
+ .flags = acc->client->flags & I2C_M_TEN,
+ .len = 1,
+ .buf = buf,
+ },
+ {
+ .addr = acc->client->addr,
+ .flags = (acc->client->flags & I2C_M_TEN) | I2C_M_RD,
+ .len = len,
+ .buf = buf,
+ },
+ };
+
+ err = i2c_transfer(acc->client->adapter, msgs, 2);
+
+ if (err != 2) {
+ dev_err(&acc->client->dev, "read transfer error\n");
+ err = -EIO;
+ } else {
+ err = 0;
+ }
+
+ return err;
+}
+
+static int lis331dlh_i2c_write(struct lis331dlh_data *acc,
+ u8 *buf, int len)
+{
+ int err;
+
+ struct i2c_msg msgs[] = {
+ {
+ .addr = acc->client->addr,
+ .flags = acc->client->flags & I2C_M_TEN,
+ .len = len + 1,
+ .buf = buf,
+ },
+ };
+
+ err = i2c_transfer(acc->client->adapter, msgs, 1);
+
+ if (err != 1) {
+ dev_err(&acc->client->dev, "write transfer error\n");
+ err = -EIO;
+ } else {
+ err = 0;
+ }
+
+ return err;
+}
+
+static int lis331dlh_hw_init(struct lis331dlh_data *acc)
+{
+ int err = -1;
+ u8 buf[6];
+
+ buf[0] = (AUTO_INCREMENT | CTRL_REG1);
+ buf[1] = acc->resume_state[0];
+ buf[2] = acc->resume_state[1];
+ buf[3] = acc->resume_state[2];
+ buf[4] = acc->resume_state[3];
+ buf[5] = acc->resume_state[4];
+ err = lis331dlh_i2c_write(acc, buf, 5);
+ if (err < 0)
+ return err;
+
+ acc->hw_initialized = 1;
+
+ return 0;
+}
+
+static void lis331dlh_device_power_off(struct lis331dlh_data *acc)
+{
+ int err;
+ u8 buf[2] = { CTRL_REG1,
+ LIS331DLH_PM_OFF | LIS331DLH_ENABLE_ALL_AXES };
+
+ err = lis331dlh_i2c_write(acc, buf, 1);
+ if (err < 0)
+ dev_err(&acc->client->dev, "soft power off failed\n");
+
+ if (acc->pdata->power_off)
+ acc->pdata->power_off();
+
+ acc->hw_initialized = 0;
+
+}
+
+static int lis331dlh_device_power_on(struct lis331dlh_data *acc)
+{
+ int err;
+
+ if (acc->pdata->power_on) {
+ err = acc->pdata->power_on();
+ if (err < 0)
+ return err;
+ }
+
+ if (!acc->hw_initialized) {
+ err = lis331dlh_hw_init(acc);
+ if (err < 0) {
+ lis331dlh_device_power_off(acc);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+int lis331dlh_update_g_range(struct lis331dlh_data *acc, u8 new_g_range)
+{
+ int err;
+ u8 shift;
+ u8 buf[2];
+ switch (new_g_range) {
+ case LIS331DLH_G_2G:
+ shift = SHIFT_ADJ_2G;
+ break;
+ case LIS331DLH_G_4G:
+ shift = SHIFT_ADJ_4G;
+ break;
+ case LIS331DLH_G_8G:
+ shift = SHIFT_ADJ_8G;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (atomic_read(&acc->enabled)) {
+ /* Set configuration register 4, which contains g range setting
+ * NOTE: this is a straight overwrite because this driver does
+ * not use any of the other configuration bits in this
+ * register. Should this become untrue, we will have to read
+ * out the value and only change the relevant bits --XX----
+ * (marked by X) */
+ buf[0] = CTRL_REG4;
+ buf[1] = new_g_range;
+ err = lis331dlh_i2c_write(acc, buf, 1);
+ if (err < 0)
+ return err;
+ }
+
+ acc->resume_state[3] = new_g_range;
+ acc->shift_adj = shift;
+
+ return 0;
+}
+
+int lis331dlh_update_odr(struct lis331dlh_data *acc, int poll_interval)
+{
+ int err = -1;
+ int i;
+ u8 config[2];
+
+ /* Convert the poll interval into an output data rate configuration
+ * that is as low as possible. The ordering of these checks must be
+ * maintained due to the cascading cut off values - poll intervals are
+ * checked from shortest to longest. At each check, if the next lower
+ * ODR cannot support the current poll interval, we stop searching */
+ for (i = 0; i < ARRAY_SIZE(odr_table); i++) {
+ config[1] = odr_table[i].mask;
+ if (poll_interval < odr_table[i].cutoff)
+ break;
+ }
+
+ config[1] |= LIS331DLH_ENABLE_ALL_AXES;
+
+ /* If device is currently enabled, we need to write new
+ * configuration out to it */
+ if (atomic_read(&acc->enabled)) {
+ config[0] = CTRL_REG1;
+ err = lis331dlh_i2c_write(acc, config, 1);
+ if (err < 0)
+ return err;
+ }
+
+ acc->resume_state[0] = config[1];
+
+ return 0;
+}
+
+static int decode(u8 *p, int adj)
+{
+ s16 v = p[0] | (p[1] << 8);
+ return (int) v >> adj;
+}
+
+static int lis331dlh_get_data(struct lis331dlh_data *acc,
+ int *xyz)
+{
+ int err = -1;
+ /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
+ u8 acc_data[6];
+ /* x,y,z hardware data */
+ int hw_d[3] = { 0 };
+
+ acc_data[0] = (AUTO_INCREMENT | AXISDATA_REG);
+ err = lis331dlh_i2c_read(acc, acc_data, 6);
+ if (err < 0)
+ return err;
+
+ hw_d[0] = decode(acc_data, acc->shift_adj);
+ hw_d[1] = decode(acc_data + 2, acc->shift_adj);
+ hw_d[2] = decode(acc_data + 4, acc->shift_adj);
+
+ xyz[0] = ((acc->pdata->negate_x) ? (-hw_d[acc->pdata->axis_map_x])
+ : (hw_d[acc->pdata->axis_map_x]));
+ xyz[1] = ((acc->pdata->negate_y) ? (-hw_d[acc->pdata->axis_map_y])
+ : (hw_d[acc->pdata->axis_map_y]));
+ xyz[2] = ((acc->pdata->negate_z) ? (-hw_d[acc->pdata->axis_map_z])
+ : (hw_d[acc->pdata->axis_map_z]));
+
+ return err;
+}
+
+static void lis331dlh_report_values(struct lis331dlh_data *acc,
+ int *xyz)
+{
+ struct input_dev *input = acc->input_poll_dev->input;
+ input_report_abs(input, ABS_X, xyz[0]);
+ input_report_abs(input, ABS_Y, xyz[1]);
+ input_report_abs(input, ABS_Z, xyz[2]);
+ input_sync(input);
+}
+
+static int lis331dlh_enable(struct lis331dlh_data *acc)
+{
+ int err;
+
+ if (!atomic_cmpxchg(&acc->enabled, 0, 1)) {
+
+ err = lis331dlh_device_power_on(acc);
+ if (err < 0) {
+ atomic_set(&acc->enabled, 0);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static int lis331dlh_disable(struct lis331dlh_data *acc)
+{
+ if (atomic_cmpxchg(&acc->enabled, 1, 0))
+ lis331dlh_device_power_off(acc);
+
+ return 0;
+}
+
+static ssize_t attr_get_polling_rate(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lis331dlh_data *acc = dev_get_drvdata(dev);
+ int val;
+ mutex_lock(&acc->lock);
+ val = acc->pdata->poll_interval;
+ mutex_unlock(&acc->lock);
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t attr_set_polling_rate(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct lis331dlh_data *acc = dev_get_drvdata(dev);
+ unsigned long interval_ms;
+
+ if (strict_strtoul(buf, 10, &interval_ms))
+ return -EINVAL;
+ if (!interval_ms)
+ return -EINVAL;
+ mutex_lock(&acc->lock);
+ acc->pdata->poll_interval = interval_ms;
+ lis331dlh_update_odr(acc, interval_ms);
+ mutex_unlock(&acc->lock);
+ return size;
+}
+
+static ssize_t attr_get_range(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lis331dlh_data *acc = dev_get_drvdata(dev);
+ char range;
+ char val;
+ mutex_lock(&acc->lock);
+ val = acc->pdata->g_range ;
+ switch (val) {
+ case LIS331DLH_G_2G:
+ range = 2;
+ break;
+ case LIS331DLH_G_4G:
+ range = 4;
+ break;
+ case LIS331DLH_G_8G:
+ range = 8;
+ break;
+ default:
+ range = 2;
+ break;
+ }
+ mutex_unlock(&acc->lock);
+ return sprintf(buf, "%d\n", range);
+}
+
+static ssize_t attr_set_range(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct lis331dlh_data *acc = dev_get_drvdata(dev);
+ unsigned long val;
+ if (strict_strtoul(buf, 10, &val))
+ return -EINVAL;
+ mutex_lock(&acc->lock);
+ acc->pdata->g_range = val;
+ lis331dlh_update_g_range(acc, val);
+ mutex_unlock(&acc->lock);
+ return size;
+}
+
+static ssize_t attr_get_enable(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lis331dlh_data *acc = dev_get_drvdata(dev);
+ int val = atomic_read(&acc->enabled);
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t attr_set_enable(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct lis331dlh_data *acc = dev_get_drvdata(dev);
+ unsigned long val;
+
+ if (strict_strtoul(buf, 10, &val))
+ return -EINVAL;
+
+ if (val)
+ lis331dlh_enable(acc);
+ else
+ lis331dlh_disable(acc);
+
+ return size;
+}
+
+static ssize_t attr_reg_set(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int rc;
+ struct lis331dlh_data *acc = dev_get_drvdata(dev);
+ u8 x[2];
+ unsigned long val;
+
+ if (strict_strtoul(buf, 16, &val))
+ return -EINVAL;
+ mutex_lock(&acc->lock);
+ x[0] = acc->reg_addr;
+ mutex_unlock(&acc->lock);
+ x[1] = val;
+ rc = lis331dlh_i2c_write(acc, x, 1);
+ return size;
+}
+
+static ssize_t attr_reg_get(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t ret;
+ struct lis331dlh_data *acc = dev_get_drvdata(dev);
+ int rc;
+ u8 data;
+
+ mutex_lock(&acc->lock);
+ data = acc->reg_addr;
+ mutex_unlock(&acc->lock);
+ rc = lis331dlh_i2c_read(acc, &data, 1);
+ ret = sprintf(buf, "0x%02x\n", data);
+ return ret;
+}
+
+static ssize_t attr_addr_set(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct lis331dlh_data *acc = dev_get_drvdata(dev);
+ unsigned long val;
+ if (strict_strtoul(buf, 16, &val))
+ return -EINVAL;
+ mutex_lock(&acc->lock);
+ acc->reg_addr = val;
+ mutex_unlock(&acc->lock);
+ return size;
+}
+
+static struct device_attribute attributes[] = {
+ __ATTR(pollrate_ms, 0666, attr_get_polling_rate, attr_set_polling_rate),
+ __ATTR(range, 0666, attr_get_range, attr_set_range),
+ __ATTR(enable, 0666, attr_get_enable, attr_set_enable),
+ __ATTR(reg_value, 0600, attr_reg_get, attr_reg_set),
+ __ATTR(reg_addr, 0200, NULL, attr_addr_set),
+};
+
+static int create_sysfs_interfaces(struct device *dev)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(attributes); i++)
+ if (device_create_file(dev, attributes + i))
+ goto error;
+ return 0;
+
+error:
+ for ( ; i >= 0; i--)
+ device_remove_file(dev, attributes + i);
+ dev_err(dev, "%s:Unable to create interface\n", __func__);
+ return -1;
+}
+
+static int remove_sysfs_interfaces(struct device *dev)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(attributes); i++)
+ device_remove_file(dev, attributes + i);
+ return 0;
+}
+
+
+static void lis331dlh_input_poll_func(struct input_polled_dev *dev)
+{
+ struct lis331dlh_data *acc = dev->private;
+
+ int xyz[3] = { 0 };
+ int err;
+
+ /* acc = container_of((struct delayed_work *)work,
+ struct lis331dlh_data, input_work); */
+
+ mutex_lock(&acc->lock);
+ err = lis331dlh_get_data(acc, xyz);
+ if (err < 0)
+ dev_err(&acc->client->dev, "get_acceleration_data failed\n");
+ else
+ lis331dlh_report_values(acc, xyz);
+
+ mutex_unlock(&acc->lock);
+}
+
+int lis331dlh_input_open(struct input_dev *input)
+{
+ struct lis331dlh_data *acc = input_get_drvdata(input);
+
+ return lis331dlh_enable(acc);
+}
+
+void lis331dlh_input_close(struct input_dev *dev)
+{
+ struct lis331dlh_data *acc = input_get_drvdata(dev);
+
+ lis331dlh_disable(acc);
+}
+
+static int lis331dlh_validate_pdata(struct lis331dlh_data *acc)
+{
+ acc->pdata->poll_interval = max(acc->pdata->poll_interval,
+ acc->pdata->min_interval);
+
+ if (acc->pdata->axis_map_x > 2 ||
+ acc->pdata->axis_map_y > 2 || acc->pdata->axis_map_z > 2) {
+ dev_err(&acc->client->dev,
+ "invalid axis_map value x:%u y:%u z%u\n",
+ acc->pdata->axis_map_x, acc->pdata->axis_map_y,
+ acc->pdata->axis_map_z);
+ return -EINVAL;
+ }
+
+ /* Only allow 0 and 1 for negation boolean flag */
+ if (acc->pdata->negate_x > 1 || acc->pdata->negate_y > 1 ||
+ acc->pdata->negate_z > 1) {
+ dev_err(&acc->client->dev,
+ "invalid negate value x:%u y:%u z:%u\n",
+ acc->pdata->negate_x, acc->pdata->negate_y,
+ acc->pdata->negate_z);
+ return -EINVAL;
+ }
+
+ /* Enforce minimum polling interval */
+ if (acc->pdata->poll_interval < acc->pdata->min_interval) {
+ dev_err(&acc->client->dev, "minimum poll interval violated\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int lis331dlh_input_init(struct lis331dlh_data *acc)
+{
+ int err;
+ struct input_dev *input;
+
+ acc->input_poll_dev = input_allocate_polled_device();
+ if (!acc->input_poll_dev) {
+ err = -ENOMEM;
+ dev_err(&acc->client->dev, "input device allocate failed\n");
+ goto err0;
+ }
+
+ /* set input-polldev handlers */
+ acc->input_poll_dev->private = acc;
+ acc->input_poll_dev->poll = lis331dlh_input_poll_func;
+ acc->input_poll_dev->poll_interval = acc->pdata->poll_interval;
+
+ input = acc->input_poll_dev->input;
+
+ input->open = lis331dlh_input_open;
+ input->close = lis331dlh_input_close;
+ input->name = LIS331DLH_DEV_NAME;
+ input->id.bustype = BUS_I2C;
+ input->dev.parent = &acc->client->dev;
+
+ input_set_drvdata(acc->input_poll_dev->input, acc);
+
+ set_bit(EV_ABS, input->evbit);
+
+ input_set_abs_params(input, ABS_X, -G_MAX, G_MAX, FUZZ, FLAT);
+ input_set_abs_params(input, ABS_Y, -G_MAX, G_MAX, FUZZ, FLAT);
+ input_set_abs_params(input, ABS_Z, -G_MAX, G_MAX, FUZZ, FLAT);
+
+ input->name = "accelerometer";
+
+ err = input_register_polled_device(acc->input_poll_dev);
+ if (err) {
+ dev_err(&acc->client->dev,
+ "unable to register input polled device %s\n",
+ acc->input_poll_dev->input->name);
+ goto err1;
+ }
+
+ return 0;
+
+err1:
+ input_free_polled_device(acc->input_poll_dev);
+err0:
+ return err;
+}
+
+static void lis331dlh_input_cleanup(struct lis331dlh_data *acc)
+{
+ input_unregister_polled_device(acc->input_poll_dev);
+ input_free_polled_device(acc->input_poll_dev);
+}
+
+static int lis331dlh_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lis331dlh_data *acc;
+ int err = -1;
+
+ if (client->dev.platform_data == NULL) {
+ dev_err(&client->dev, "platform data is NULL. exiting.\n");
+ err = -ENODEV;
+ goto err0;
+ }
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "client not i2c capable\n");
+ err = -ENODEV;
+ goto err0;
+ }
+
+ acc = kzalloc(sizeof(*acc), GFP_KERNEL);
+ if (acc == NULL) {
+ dev_err(&client->dev,
+ "failed to allocate memory for module data\n");
+ err = -ENOMEM;
+ goto err0;
+ }
+
+ mutex_init(&acc->lock);
+ mutex_lock(&acc->lock);
+ acc->client = client;
+
+ acc->pdata = kmalloc(sizeof(*acc->pdata), GFP_KERNEL);
+ if (acc->pdata == NULL)
+ goto err1;
+
+ memcpy(acc->pdata, client->dev.platform_data, sizeof(*acc->pdata));
+
+ err = lis331dlh_validate_pdata(acc);
+ if (err < 0) {
+ dev_err(&client->dev, "failed to validate platform data\n");
+ goto err1_1;
+ }
+
+ i2c_set_clientdata(client, acc);
+
+ if (acc->pdata->init) {
+ err = acc->pdata->init();
+ if (err < 0)
+ goto err1_1;
+ }
+
+ memset(acc->resume_state, 0, ARRAY_SIZE(acc->resume_state));
+
+ acc->resume_state[0] = 0x27;
+ acc->resume_state[1] = 0x00;
+ acc->resume_state[2] = 0x00;
+ acc->resume_state[3] = 0x00;
+ acc->resume_state[4] = 0x00;
+
+ err = lis331dlh_device_power_on(acc);
+ if (err < 0)
+ goto err2;
+
+ atomic_set(&acc->enabled, 1);
+
+ err = lis331dlh_update_g_range(acc, acc->pdata->g_range);
+ if (err < 0) {
+ dev_err(&client->dev, "update_g_range failed\n");
+ goto err2;
+ }
+
+ err = lis331dlh_update_odr(acc, acc->pdata->poll_interval);
+ if (err < 0) {
+ dev_err(&client->dev, "update_odr failed\n");
+ goto err2;
+ }
+
+ err = lis331dlh_input_init(acc);
+ if (err < 0)
+ goto err3;
+
+ err = create_sysfs_interfaces(&client->dev);
+ if (err < 0) {
+ dev_err(&client->dev, "lsm_acc_device register failed\n");
+ goto err4;
+ }
+
+ lis331dlh_device_power_off(acc);
+
+ /* As default, do not report information */
+ atomic_set(&acc->enabled, 0);
+
+ mutex_unlock(&acc->lock);
+
+ dev_info(&client->dev, "lis331dlh probed\n");
+
+ return 0;
+
+err4:
+ lis331dlh_input_cleanup(acc);
+err3:
+ lis331dlh_device_power_off(acc);
+err2:
+ if (acc->pdata->exit)
+ acc->pdata->exit();
+err1_1:
+ mutex_unlock(&acc->lock);
+ kfree(acc->pdata);
+err1:
+ kfree(acc);
+err0:
+ return err;
+}
+
+static int __devexit lis331dlh_remove(struct i2c_client *client)
+{
+ /* TODO: revisit ordering here once _probe order is finalized */
+ struct lis331dlh_data *acc = i2c_get_clientdata(client);
+ lis331dlh_input_cleanup(acc);
+ lis331dlh_device_power_off(acc);
+ remove_sysfs_interfaces(&client->dev);
+ if (acc->pdata->exit)
+ acc->pdata->exit();
+ kfree(acc->pdata);
+ kfree(acc);
+
+ return 0;
+}
+
+static int lis331dlh_resume(struct i2c_client *client)
+{
+ struct lis331dlh_data *acc = i2c_get_clientdata(client);
+
+ if (acc->on_before_suspend)
+ return lis331dlh_enable(acc);
+ return 0;
+}
+
+static int lis331dlh_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ struct lis331dlh_data *acc = i2c_get_clientdata(client);
+
+ acc->on_before_suspend = atomic_read(&acc->enabled);
+ return lis331dlh_disable(acc);
+}
+
+static const struct i2c_device_id lis331dlh_id[] = {
+ {LIS331DLH_DEV_NAME, 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(i2c, lis331dlh_id);
+
+static struct i2c_driver lis331dlh_driver = {
+ .driver = {
+ .name = LIS331DLH_DEV_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = lis331dlh_probe,
+ .remove = __devexit_p(lis331dlh_remove),
+ .resume = lis331dlh_resume,
+ .suspend = lis331dlh_suspend,
+ .id_table = lis331dlh_id,
+};
+
+static int __init lis331dlh_init(void)
+{
+ pr_debug("LIS331DLH driver for the accelerometer part\n");
+ return i2c_add_driver(&lis331dlh_driver);
+}
+
+static void __exit lis331dlh_exit(void)
+{
+ i2c_del_driver(&lis331dlh_driver);
+ return;
+}
+
+module_init(lis331dlh_init);
+module_exit(lis331dlh_exit);
+
+MODULE_DESCRIPTION("lis331dlh accelerometer driver");
+MODULE_AUTHOR("STMicroelectronics");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/input/misc/lis331dlh.h b/drivers/input/misc/lis331dlh.h
new file mode 100644
index 0000000..4ea008a
--- /dev/null
+++ b/drivers/input/misc/lis331dlh.h
@@ -0,0 +1,83 @@
+/******************** (C) COPYRIGHT 2010 STMicroelectronics ********************
+*
+* File Name : lis331dlh.h
+* Authors : MSH - Motion Mems BU - Application Team
+* : Carmine Iascone (carmine.iascone@xxxxxx)
+* : Matteo Dameno (matteo.dameno@xxxxxx)
+* Version : V 1.0.0
+* Date : 08/11/2010
+* Description : LIS331DLH sensor API
+*
+********************************************************************************
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License version 2 as
+* published by the Free Software Foundation.
+*
+* THE PRESENT SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES
+* OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, FOR THE SOLE
+* PURPOSE TO SUPPORT YOUR APPLICATION DEVELOPMENT.
+* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
+* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
+* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
+* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+*
+* THIS SOFTWARE IS SPECIFICALLY DESIGNED FOR EXCLUSIVE USE WITH ST PARTS.
+*
+*******************************************************************************/
+
+#ifndef __LIS331DLH_H__
+#define __LIS331DLH_H__
+
+#include <linux/types.h>
+
+/************************************************/
+/* Accelerometer section defines */
+/************************************************/
+
+/* Accelerometer Sensor Full Scale */
+#define LIS331DLH_G_2G 0x00
+#define LIS331DLH_G_4G 0x10
+#define LIS331DLH_G_8G 0x30
+
+/* Accelerometer Sensor Operating Mode */
+#define LIS331DLH_PM_OFF 0x00
+#define LIS331DLH_PM_NORMAL 0x20
+#define LIS331DLH_ENABLE_ALL_AXES 0x07
+
+/* Accelerometer output data rate */
+#define LIS331DLH_ODRHALF 0x40 /* 0.5Hz output data rate */
+#define LIS331DLH_ODR1 0x60 /* 1Hz output data rate */
+#define LIS331DLH_ODR2 0x80 /* 2Hz output data rate */
+#define LIS331DLH_ODR5 0xA0 /* 5Hz output data rate */
+#define LIS331DLH_ODR10 0xC0 /* 10Hz output data rate */
+#define LIS331DLH_ODR50 0x00 /* 50Hz output data rate */
+#define LIS331DLH_ODR100 0x08 /* 100Hz output data rate */
+#define LIS331DLH_ODR400 0x10 /* 400Hz output data rate */
+#define LIS331DLH_ODR1000 0x18 /* 1000Hz output data rate */
+
+#ifdef __KERNEL__
+struct lis331dlh_platform_data {
+
+ int poll_interval;
+ int min_interval;
+
+ u8 g_range;
+
+ u8 axis_map_x;
+ u8 axis_map_y;
+ u8 axis_map_z;
+
+ u8 negate_x;
+ u8 negate_y;
+ u8 negate_z;
+
+ int (*init)(void);
+ void (*exit)(void);
+ int (*power_on)(void);
+ int (*power_off)(void);
+
+};
+#endif /* __KERNEL__ */
+
+#endif /* __LIS331DLH_H__ */
--
1.5.4.3
--
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