Signed-off-by: Hemanth V <hemanthv@xxxxxx>
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
Documentation/input/cma3000_d0x.txt | 112 ++++++
drivers/input/misc/Kconfig | 7 +
drivers/input/misc/Makefile | 1 +
drivers/input/misc/cma3000_d0x.c | 633
++++++++++++++++++++++++++++++++++
drivers/input/misc/cma3000_d0x.h | 46 +++
drivers/input/misc/cma3000_d0x_i2c.c | 136 ++++++++
include/linux/i2c/cma3000.h | 60 ++++
7 files changed, 995 insertions(+), 0 deletions(-)
create mode 100644 Documentation/input/cma3000_d0x.txt
create mode 100644 drivers/input/misc/cma3000_d0x.c
create mode 100644 drivers/input/misc/cma3000_d0x.h
create mode 100644 drivers/input/misc/cma3000_d0x_i2c.c
create mode 100644 include/linux/i2c/cma3000.h
diff --git a/Documentation/input/cma3000_d0x.txt
b/Documentation/input/cma3000_d0x.txt
new file mode 100644
index 0000000..29ab6b7
--- /dev/null
+++ b/Documentation/input/cma3000_d0x.txt
@@ -0,0 +1,112 @@
+Kernel driver for CMA3000-D0x
+============================
+
+Supported chips:
+* VTI CMA3000-D0x
+Datasheet:
+ CMA3000-D0X Product Family Specification 8281000A.02.pdf
+
+Author: Hemanth V <hemanthv@xxxxxx>
+
+
+Description
+-----------
+CMA3000 Tri-axis accelerometer supports Motion detect, Measurement and
+Free fall modes.
+
+Motion Detect Mode: Its the low power mode where interrupts are
generated only
+when motion exceeds the defined thresholds.
+
+Measurement Mode: This mode is used to read the acceleration data on
X,Y,Z
+axis and supports 400, 100, 40 Hz sample frequency.
+
+Free fall Mode: This mode is intented to save system resources.
+
+Threshold values: Chip supports defining threshold values for above
modes
+which includes time and g value. Refer product specifications for more
details.
+
+CMA3000 supports both I2C/SPI bus for communication, currently the
driver
+supports I2C based communication.
+
+Driver reports acceleration data through input subsystem and supports
sysfs
+for configuration changes. It generates ABS_MISC event with value 1 when
+free fall is detected.
+
+Platform data need to be configured for initial default values.
+
+Platform Data
+-------------
+fuzz_x: Noise on X Axis
+
+fuzz_y: Noise on Y Axis
+
+fuzz_z: Noise on Z Axis
+
+g_range: G range in milli g i.e 2000 or 8000
+
+mode: Default Operating mode
+
+mdthr: Motion detect threshold value
+
+mdfftmr: Motion detect and free fall time value
+
+ffthr: Free fall threshold value
+
+Input Interface
+--------------
+Input driver version is 1.0.0
+Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
+Input device name: "cma3000-acclerometer"
+Supported events:
+ Event type 0 (Sync)
+ Event type 3 (Absolute)
+ Event code 0 (X)
+ Value 47
+ Min -8000
+ Max 8000
+ Fuzz 200
+ Event code 1 (Y)
+ Value -28
+ Min -8000
+ Max 8000
+ Fuzz 200
+ Event code 2 (Z)
+ Value 905
+ Min -8000
+ Max 8000
+ Fuzz 200
+ Event code 40 (Misc)
+ Value 0
+ Min 0
+ Max 1
+ Event type 4 (Misc)
+
+Sysfs entries
+-------------
+
+mode:
+ 0: power down mode
+ 1: 100 Hz Measurement mode
+ 2: 400 Hz Measurement mode
+ 3: 40 Hz Measurement mode
+ 4: Motion Detect mode (default)
+ 5: 100 Hz Free fall mode
+ 6: 40 Hz Free fall mode
+ 7: Power off mode
+
+grange:
+ 2000: 2000 mg or 2G Range
+ 8000: 8000 mg or 8G Range
+
+mdthr:
+ X: X * 71mg (8G Range)
+ X: X * 18mg (2G Range)
+
+mdfftmr:
+ X: (X & 0x70) * 100 ms (MDTMR)
+ (X & 0x0F) * 2.5 ms (FFTMR 400 Hz)
+ (X & 0x0F) * 10 ms (FFTMR 100 Hz)
+
+ffthr:
+ X: (X >> 2) * 18mg (2G Range)
+ X: (X & 0x0F) * 71 mg (8G Range)
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 1cf25ee..043ee8d 100755
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -340,4 +340,11 @@
To compile this driver as a module, choose M here: the
module will be called pcap_keys.
+config INPUT_CMA3000_I2C
+ bool "VTI CMA3000 Tri-axis accelerometer"
+ depends on I2C && SYSFS
+ help
+ Say Y here if you want to use VTI CMA3000 Accelerometer
+ through I2C interface.
+
endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 07ee237..011161d 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -32,3 +32,4 @@
obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o
obj-$(CONFIG_INPUT_YEALINK) += yealink.o
+obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x.o cma3000_d0x_i2c.o
diff --git a/drivers/input/misc/cma3000_d0x.c
b/drivers/input/misc/cma3000_d0x.c
new file mode 100644
index 0000000..812c464
--- /dev/null
+++ b/drivers/input/misc/cma3000_d0x.c
@@ -0,0 +1,633 @@
+/*
+ * cma3000_d0x.c
+ * VTI CMA3000_D0x Accelerometer driver
+ * Supports I2C/SPI interfaces
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@xxxxxx>
+ *
+ * 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.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/i2c/cma3000.h>
+
+#include "cma3000_d0x.h"
+
+#define CMA3000_WHOAMI 0x00
+#define CMA3000_REVID 0x01
+#define CMA3000_CTRL 0x02
+#define CMA3000_STATUS 0x03
+#define CMA3000_RSTR 0x04
+#define CMA3000_INTSTATUS 0x05
+#define CMA3000_DOUTX 0x06
+#define CMA3000_DOUTY 0x07
+#define CMA3000_DOUTZ 0x08
+#define CMA3000_MDTHR 0x09
+#define CMA3000_MDFFTMR 0x0A
+#define CMA3000_FFTHR 0x0B
+
+#define CMA3000_RANGE2G (1 << 7)
+#define CMA3000_RANGE8G (0 << 7)
+#define CMA3000_BUSI2C (0 << 4)
+#define CMA3000_MODEMASK (7 << 1)
+#define CMA3000_GRANGEMASK (1 << 7)
+
+#define CMA3000_STATUS_PERR 1
+#define CMA3000_INTSTATUS_FFDET (1 << 2)
+
+/* Settling time delay in ms */
+#define CMA3000_SETDELAY 30
+
+/* Delay for clearing interrupt in us */
+#define CMA3000_INTDELAY 44
+
+
+/*
+ * Bit weights in mg for bit 0, other bits need
+ * multipy factor 2^n. Eight bit is the sign bit.
+ */
+#define BIT_TO_2G 18
+#define BIT_TO_8G 71
+
+/*
+ * Conversion for each of the eight modes to g, depending
+ * on G range i.e 2G or 8G. Some modes always operate in
+ * 8G.
+ */
+
+static int mode_to_mg[8][2] = {
+ {0, 0},
+ {BIT_TO_8G, BIT_TO_2G},
+ {BIT_TO_8G, BIT_TO_2G},
+ {BIT_TO_8G, BIT_TO_8G},
+ {BIT_TO_8G, BIT_TO_8G},
+ {BIT_TO_8G, BIT_TO_2G},
+ {BIT_TO_8G, BIT_TO_2G},
+ {0, 0},
+};
+
+static ssize_t cma3000_show_attr_mode(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ uint8_t mode;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+
+ mode = cma3000_read(data, CMA3000_CTRL, "ctrl");
+ if (mode < 0)
+ return mode;
+
+ return sprintf(buf, "%d\n", (mode & CMA3000_MODEMASK) >> 1);
+}
+
+static ssize_t cma3000_store_attr_mode(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+ unsigned long val;
+ int error;
+ uint8_t ctrl;
+
+ error = strict_strtoul(buf, 0, &val);
+ if (error)
+ goto err_op3_failed;
+
+ if (val < CMAMODE_DEFAULT || val > CMAMODE_POFF) {
+ error = -EINVAL;
+ goto err_op3_failed;
+ }
+
+ mutex_lock(&data->mutex);
+ val &= (CMA3000_MODEMASK >> 1);
+ ctrl = cma3000_read(data, CMA3000_CTRL, "ctrl");
+ if (ctrl < 0) {
+ error = ctrl;
+ goto err_op2_failed;
+ }
+
+ ctrl &= ~CMA3000_MODEMASK;
+ ctrl |= (val << 1);
+ data->pdata.mode = val;
+ disable_irq(data->client->irq);
+
+ error = cma3000_set(data, CMA3000_CTRL, ctrl, "ctrl");
+ if (error < 0)
+ goto err_op1_failed;
+
+ /* Settling time delay required after mode change */
+ msleep(CMA3000_SETDELAY);
+
+ enable_irq(data->client->irq);
+ mutex_unlock(&data->mutex);
+ return count;
+
+err_op1_failed:
+ enable_irq(data->client->irq);
+err_op2_failed:
+ mutex_unlock(&data->mutex);
+err_op3_failed:
+ return error;
+}
+
+static ssize_t cma3000_show_attr_grange(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ uint8_t mode;
+ int g_range;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+
+ mode = cma3000_read(data, CMA3000_CTRL, "ctrl");
+ if (mode < 0)
+ return mode;
+
+ g_range = (mode & CMA3000_GRANGEMASK) ? CMARANGE_2G : CMARANGE_8G;
+ return sprintf(buf, "%d\n", g_range);
+}
+
+static ssize_t cma3000_store_attr_grange(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+ unsigned long val;
+ int error, g_range, fuzz_x, fuzz_y, fuzz_z;
+ uint8_t ctrl;
+
+ error = strict_strtoul(buf, 0, &val);
+ if (error)
+ goto err_op3_failed;
+
+ mutex_lock(&data->mutex);
+ ctrl = cma3000_read(data, CMA3000_CTRL, "ctrl");
+ if (ctrl < 0) {
+ error = ctrl;
+ goto err_op2_failed;
+ }
+
+ ctrl &= ~CMA3000_GRANGEMASK;
+
+ if (val == CMARANGE_2G) {
+ ctrl |= CMA3000_RANGE2G;
+ data->pdata.g_range = CMARANGE_2G;
+ } else if (val == CMARANGE_8G) {
+ ctrl |= CMA3000_RANGE8G;
+ data->pdata.g_range = CMARANGE_8G;
+ } else {
+ error = -EINVAL;
+ goto err_op2_failed;
+ }
+
+ g_range = data->pdata.g_range;
+ fuzz_x = data->pdata.fuzz_x;
+ fuzz_y = data->pdata.fuzz_y;
+ fuzz_z = data->pdata.fuzz_z;
+
+ disable_irq(data->client->irq);
+ error = cma3000_set(data, CMA3000_CTRL, ctrl, "ctrl");
+ if (error < 0)
+ goto err_op1_failed;
+
+ input_set_abs_params(data->input_dev, ABS_X, -g_range,
+ g_range, fuzz_x, 0);
+ input_set_abs_params(data->input_dev, ABS_Y, -g_range,
+ g_range, fuzz_y, 0);
+ input_set_abs_params(data->input_dev, ABS_Z, -g_range,
+ g_range, fuzz_z, 0);
+
+ enable_irq(data->client->irq);
+ mutex_unlock(&data->mutex);
+ return count;
+
+err_op1_failed:
+ enable_irq(data->client->irq);
+err_op2_failed:
+ mutex_unlock(&data->mutex);
+err_op3_failed:
+ return error;
+}
+
+static ssize_t cma3000_show_attr_mdthr(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ uint8_t mode;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+
+ mode = cma3000_read(data, CMA3000_MDTHR, "mdthr");
+ if (mode < 0)
+ return mode;
+
+ return sprintf(buf, "%d\n", mode);
+}
+
+static ssize_t cma3000_store_attr_mdthr(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+ unsigned long val;
+ int error;
+
+ error = strict_strtoul(buf, 0, &val);
+ if (error)
+ return error;
+
+ mutex_lock(&data->mutex);
+ data->pdata.mdthr = val;
+ disable_irq(data->client->irq);
+ error = cma3000_set(data, CMA3000_MDTHR, val, "mdthr");
+ enable_irq(data->client->irq);
+ mutex_unlock(&data->mutex);
+
+ /* If there was error during write, return error */
+ if (error < 0)
+ return error;
+ else
+ return count;
+}
+
+static ssize_t cma3000_show_attr_mdfftmr(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ uint8_t mode;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+
+ mode = cma3000_read(data, CMA3000_MDFFTMR, "mdfftmr");
+ if (mode < 0)
+ return mode;
+
+ return sprintf(buf, "%d\n", mode);
+}
+
+static ssize_t cma3000_store_attr_mdfftmr(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+ unsigned long val;
+ int error;
+
+ error = strict_strtoul(buf, 0, &val);
+ if (error)
+ return error;
+
+ mutex_lock(&data->mutex);
+ data->pdata.mdfftmr = val;
+ disable_irq(data->client->irq);
+ error = cma3000_set(data, CMA3000_MDFFTMR, val, "mdthr");
+ enable_irq(data->client->irq);
+ mutex_unlock(&data->mutex);
+
+ /* If there was error during write, return error */
+ if (error < 0)
+ return error;
+ else
+ return count;
+}
+
+static ssize_t cma3000_show_attr_ffthr(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ uint8_t mode;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+
+ mode = cma3000_read(data, CMA3000_FFTHR, "ffthr");
+ if (mode < 0)
+ return mode;
+
+ return sprintf(buf, "%d\n", mode);
+}
+
+static ssize_t cma3000_store_attr_ffthr(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct cma3000_accl_data *data = platform_get_drvdata(pdev);
+ unsigned long val;
+ int error;
+
+ error = strict_strtoul(buf, 0, &val);
+ if (error)
+ return error;
+
+ mutex_lock(&data->mutex);
+ data->pdata.ffthr = val;
+ disable_irq(data->client->irq);
+ error = cma3000_set(data, CMA3000_FFTHR, val, "mdthr");
+ enable_irq(data->client->irq);
+ mutex_unlock(&data->mutex);
+
+ /* If there was error during write, return error */
+ if (error < 0)
+ return error;
+ else
+ return count;
+}
+
+static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
+ cma3000_show_attr_mode, cma3000_store_attr_mode);
+
+static DEVICE_ATTR(grange, S_IWUSR | S_IRUGO,
+ cma3000_show_attr_grange, cma3000_store_attr_grange);
+
+static DEVICE_ATTR(mdthr, S_IWUSR | S_IRUGO,
+ cma3000_show_attr_mdthr, cma3000_store_attr_mdthr);
+
+static DEVICE_ATTR(mdfftmr, S_IWUSR | S_IRUGO,
+ cma3000_show_attr_mdfftmr, cma3000_store_attr_mdfftmr);
+
+static DEVICE_ATTR(ffthr, S_IWUSR | S_IRUGO,
+ cma3000_show_attr_ffthr, cma3000_store_attr_ffthr);
+
+
+static struct attribute *cma_attrs[] = {
+ &dev_attr_mode.attr,
+ &dev_attr_grange.attr,
+ &dev_attr_mdthr.attr,
+ &dev_attr_mdfftmr.attr,
+ &dev_attr_ffthr.attr,
+ NULL,
+};
+
+static struct attribute_group cma3000_attr_group = {
+ .attrs = cma_attrs,
+};
+
+static void decode_mg(struct cma3000_accl_data *data, int *datax,
+ int *datay, int *dataz)
+{
+ /* Data in 2's complement, convert to mg */
+ *datax = (((s8)(*datax)) * (data->bit_to_mg));
+ *datay = (((s8)(*datay)) * (data->bit_to_mg));
+ *dataz = (((s8)(*dataz)) * (data->bit_to_mg));
+}
+
+static irqreturn_t cma3000_thread_irq(int irq, void *dev_id)
+{
+ struct cma3000_accl_data *data = dev_id;
+ int datax, datay, dataz;
+ u8 ctrl, mode, range, intr_status;
+
+ intr_status = cma3000_read(data, CMA3000_INTSTATUS, "interrupt
status");
+ if (intr_status < 0)
+ return IRQ_NONE;
+
+ /* Check if free fall is detected, report immediately */
+ if (intr_status & CMA3000_INTSTATUS_FFDET) {
+ input_report_abs(data->input_dev, ABS_MISC, 1);
+ input_sync(data->input_dev);
+ } else {
+ input_report_abs(data->input_dev, ABS_MISC, 0);
+ }
+
+ datax = cma3000_read(data, CMA3000_DOUTX, "X");
+ datay = cma3000_read(data, CMA3000_DOUTY, "Y");
+ dataz = cma3000_read(data, CMA3000_DOUTZ, "Z");
+
+ ctrl = cma3000_read(data, CMA3000_CTRL, "ctrl");
+ mode = (ctrl & CMA3000_MODEMASK) >> 1;
+ range = (ctrl & CMA3000_GRANGEMASK) >> 7;
+
+ data->bit_to_mg = mode_to_mg[mode][range];
+
+ /* Interrupt not for this device */
+ if (data->bit_to_mg == 0)
+ return IRQ_NONE;
+
+ /* Decode register values to milli g */
+ decode_mg(data, &datax, &datay, &dataz);
+
+ input_report_abs(data->input_dev, ABS_X, datax);
+ input_report_abs(data->input_dev, ABS_Y, datay);
+ input_report_abs(data->input_dev, ABS_Z, dataz);
+ input_sync(data->input_dev);
+
+ return IRQ_HANDLED;
+}
+
+static int cma3000_reset(struct cma3000_accl_data *data)
+{
+ int ret;
+
+ /* Reset sequence */
+ cma3000_set(data, CMA3000_RSTR, 0x02, "Reset");
+ cma3000_set(data, CMA3000_RSTR, 0x0A, "Reset");
+ cma3000_set(data, CMA3000_RSTR, 0x04, "Reset");
+
+ /* Settling time delay */
+ mdelay(10);
+
+ ret = cma3000_read(data, CMA3000_STATUS, "Status");
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Reset failed\n");
+ return ret;
+ } else if (ret & CMA3000_STATUS_PERR) {
+ dev_err(&data->client->dev, "Parity Error\n");
+ return -EIO;
+ } else {
+ return 0;
+ }
+}
+
+int cma3000_poweron(struct cma3000_accl_data *data)
+{
+ uint8_t ctrl = 0, mdthr, mdfftmr, ffthr, mode;
+ int g_range, ret;
+
+ g_range = data->pdata.g_range;
+ mode = data->pdata.mode;
+ mdthr = data->pdata.mdthr;
+ mdfftmr = data->pdata.mdfftmr;
+ ffthr = data->pdata.ffthr;
+
+ if (mode < CMAMODE_DEFAULT || mode > CMAMODE_POFF) {
+ data->pdata.mode = CMAMODE_MOTDET;
+ mode = data->pdata.mode;
+ dev_info(&data->client->dev,
+ "Invalid mode specified, assuming Motion Detect\n");
+ }
+
+ if (g_range == CMARANGE_2G) {
+ ctrl = (mode << 1) | CMA3000_RANGE2G;
+ } else if (g_range == CMARANGE_8G) {
+ ctrl = (mode << 1) | CMA3000_RANGE8G;
+ } else {
+ dev_info(&data->client->dev,
+ "Invalid G range specified, assuming 8G\n");
+ ctrl = (mode << 1) | CMA3000_RANGE8G;
+ data->pdata.g_range = CMARANGE_8G;
+ }
+#ifdef CONFIG_INPUT_CMA3000_I2C
+ ctrl |= CMA3000_BUSI2C;
+#endif
+
+ cma3000_set(data, CMA3000_MDTHR, mdthr, "Motion Detect Threshold");
+ cma3000_set(data, CMA3000_MDFFTMR, mdfftmr, "Time register");
+ cma3000_set(data, CMA3000_FFTHR, ffthr, "Free fall threshold");
+ ret = cma3000_set(data, CMA3000_CTRL, ctrl, "Mode setting");
+ if (ret < 0)
+ return -EIO;
+
+ mdelay(CMA3000_SETDELAY);
+
+ return 0;
+}
+
+int cma3000_poweroff(struct cma3000_accl_data *data)
+{
+ int ret;
+
+ ret = cma3000_set(data, CMA3000_CTRL, CMAMODE_POFF, "Mode setting");
+ mdelay(CMA3000_SETDELAY);
+
+ return ret;
+}
+
+int cma3000_init(struct cma3000_accl_data *data)
+{
+ int ret = 0, fuzz_x, fuzz_y, fuzz_z, g_range;
+ uint32_t irqflags;
+
+ if (data->client->dev.platform_data == NULL) {
+ dev_err(&data->client->dev, "platform data not found\n");
+ goto err_op2_failed;
+ }
+
+ memcpy(&(data->pdata), data->client->dev.platform_data,
+ sizeof(struct cma3000_platform_data));
+
+ ret = cma3000_reset(data);
+ if (ret)
+ goto err_op2_failed;
+
+ ret = cma3000_read(data, CMA3000_REVID, "Revid");
+ if (ret < 0)
+ goto err_op2_failed;
+
+ pr_info("CMA3000 Acclerometer : Revision %x\n", ret);
+
+ /* Bring it out of default power down state */
+ ret = cma3000_poweron(data);
+ if (ret < 0)
+ goto err_op2_failed;
+
+ fuzz_x = data->pdata.fuzz_x;
+ fuzz_y = data->pdata.fuzz_y;
+ fuzz_z = data->pdata.fuzz_z;
+ g_range = data->pdata.g_range;
+ irqflags = data->pdata.irqflags;
+
+ data->input_dev = input_allocate_device();
+ if (data->input_dev == NULL) {
+ ret = -ENOMEM;
+ dev_err(&data->client->dev,
+ "Failed to allocate input device\n");
+ goto err_op2_failed;
+ }
+
+ data->input_dev->name = "cma3000-acclerometer";
+
+#ifdef CONFIG_INPUT_CMA3000_I2C
+ data->input_dev->id.bustype = BUS_I2C;
+#endif
+
+ __set_bit(EV_ABS, data->input_dev->evbit);
+ __set_bit(EV_MSC, data->input_dev->evbit);
+
+ input_set_abs_params(data->input_dev, ABS_X, -g_range,
+ g_range, fuzz_x, 0);
+ input_set_abs_params(data->input_dev, ABS_Y, -g_range,
+ g_range, fuzz_y, 0);
+ input_set_abs_params(data->input_dev, ABS_Z, -g_range,
+ g_range, fuzz_z, 0);
+ input_set_abs_params(data->input_dev, ABS_MISC, 0,
+ 1, 0, 0);
+
+ ret = input_register_device(data->input_dev);
+ if (ret) {
+ dev_err(&data->client->dev,
+ "Unable to register input device\n");
+ goto err_op2_failed;
+ }
+
+ mutex_init(&data->mutex);
+
+ if (data->client->irq) {
+ ret = request_threaded_irq(data->client->irq, NULL,
+ cma3000_thread_irq,
+ irqflags | IRQF_ONESHOT,
+ data->client->name, data);
+
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "request_threaded_irq failed\n");
+ goto err_op1_failed;
+ }
+ }
+
+ ret = sysfs_create_group(&data->client->dev.kobj, &cma3000_attr_group);
+ if (ret) {
+ dev_err(&data->client->dev,
+ "failed to create sysfs entries\n");
+ goto err_op1_failed;
+ }
+ return 0;
+
+err_op1_failed:
+ mutex_destroy(&data->mutex);
+ input_unregister_device(data->input_dev);
+err_op2_failed:
+ if (data != NULL) {
+ if (data->input_dev != NULL)
+ input_free_device(data->input_dev);
+ }
+
+ return ret;
+}
+
+int cma3000_exit(struct cma3000_accl_data *data)
+{
+ int ret;
+
+ ret = cma3000_poweroff(data);
+
+ if (data->client->irq)
+ free_irq(data->client->irq, data);
+
+ mutex_destroy(&data->mutex);
+ input_unregister_device(data->input_dev);
+ input_free_device(data->input_dev);
+ sysfs_remove_group(&data->client->dev.kobj, &cma3000_attr_group);
+ return ret;
+}
diff --git a/drivers/input/misc/cma3000_d0x.h
b/drivers/input/misc/cma3000_d0x.h
new file mode 100644
index 0000000..12a8faf
--- /dev/null
+++ b/drivers/input/misc/cma3000_d0x.h
@@ -0,0 +1,46 @@
+/*
+ * cma3000_d0x.h
+ * VTI CMA3000_D0x Accelerometer driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@xxxxxx>
+ *
+ * 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.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef INPUT_CMA3000_H
+#define INPUT_CMA3000_H
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+
+struct cma3000_accl_data {
+#ifdef CONFIG_INPUT_CMA3000_I2C
+ struct i2c_client *client;
+#endif
+ struct input_dev *input_dev;
+ struct cma3000_platform_data pdata;
+
+ /* mutex for sysfs operations */
+ struct mutex mutex;
+ int bit_to_mg;
+};
+
+int cma3000_set(struct cma3000_accl_data *, u8, u8, char *);
+int cma3000_read(struct cma3000_accl_data *, u8, char *);
+int cma3000_init(struct cma3000_accl_data *);
+int cma3000_exit(struct cma3000_accl_data *);
+int cma3000_poweron(struct cma3000_accl_data *);
+int cma3000_poweroff(struct cma3000_accl_data *);
+
+#endif
diff --git a/drivers/input/misc/cma3000_d0x_i2c.c
b/drivers/input/misc/cma3000_d0x_i2c.c
new file mode 100644
index 0000000..41f845c
--- /dev/null
+++ b/drivers/input/misc/cma3000_d0x_i2c.c
@@ -0,0 +1,136 @@
+/*
+ * cma3000_d0x_i2c.c
+ *
+ * Implements I2C interface for VTI CMA300_D0x Accelerometer driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@xxxxxx>
+ *
+ * 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.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/i2c/cma3000.h>
+#include "cma3000_d0x.h"
+
+int cma3000_set(struct cma3000_accl_data *accl, u8 reg, u8 val, char
*msg)
+{
+ int ret = i2c_smbus_write_byte_data(accl->client, reg, val);
+ if (ret < 0)
+ dev_err(&accl->client->dev,
+ "i2c_smbus_write_byte_data failed (%s)\n", msg);
+ return ret;
+}
+
+int cma3000_read(struct cma3000_accl_data *accl, u8 reg, char *msg)
+{
+ int ret = i2c_smbus_read_byte_data(accl->client, reg);
+ if (ret < 0)
+ dev_err(&accl->client->dev,
+ "i2c_smbus_read_byte_data failed (%s)\n", msg);
+ return ret;
+}
+
+static int __devinit cma3000_accl_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct cma3000_accl_data *data = NULL;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (data == NULL) {
+ ret = -ENOMEM;
+ goto err_op_failed;
+ }
+
+ data->client = client;
+ i2c_set_clientdata(client, data);
+
+ ret = cma3000_init(data);
+ if (ret)
+ goto err_op_failed;
+
+ return 0;
+
+err_op_failed:
+
+ if (data != NULL)
+ kfree(data);
+
+ return ret;
+}
+
+static int __devexit cma3000_accl_remove(struct i2c_client *client)
+{
+ struct cma3000_accl_data *data = i2c_get_clientdata(client);
+ int ret;
+
+ ret = cma3000_exit(data);
+ i2c_set_clientdata(client, NULL);
+ kfree(data);
+
+ return ret;
+}
+
+#ifdef CONFIG_PM
+static int cma3000_accl_suspend(struct i2c_client *client, pm_message_t
mesg)
+{
+ struct cma3000_accl_data *data = i2c_get_clientdata(client);
+
+ return cma3000_poweroff(data);
+}
+
+static int cma3000_accl_resume(struct i2c_client *client)
+{
+ struct cma3000_accl_data *data = i2c_get_clientdata(client);
+
+ return cma3000_poweron(data);
+}
+#endif
+
+static const struct i2c_device_id cma3000_id[] = {
+ { "cma3000_accl", 0 },
+ { },
+};
+
+static struct i2c_driver cma3000_accl_driver = {
+ .probe = cma3000_accl_probe,
+ .remove = cma3000_accl_remove,
+ .id_table = cma3000_id,
+#ifdef CONFIG_PM
+ .suspend = cma3000_accl_suspend,
+ .resume = cma3000_accl_resume,
+#endif
+ .driver = {
+ .name = "cma3000_accl"
+ },
+};
+
+static int __init cma3000_accl_init(void)
+{
+ return i2c_add_driver(&cma3000_accl_driver);
+}
+
+static void __exit cma3000_accl_exit(void)
+{
+ i2c_del_driver(&cma3000_accl_driver);
+}
+
+module_init(cma3000_accl_init);
+module_exit(cma3000_accl_exit);
+
+MODULE_DESCRIPTION("CMA3000-D0x Accelerometer Driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Hemanth V <hemanthv@xxxxxx>");
diff --git a/include/linux/i2c/cma3000.h b/include/linux/i2c/cma3000.h
new file mode 100644
index 0000000..50aa3fc
--- /dev/null
+++ b/include/linux/i2c/cma3000.h
@@ -0,0 +1,60 @@
+/*
+ * cma3000.h
+ * VTI CMA300_Dxx Accelerometer driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@xxxxxx>
+ *
+ * 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.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _LINUX_CMA3000_I2C_H
+#define _LINUX_CMA3000_I2C_H
+
+#define CMAMODE_DEFAULT 0
+#define CMAMODE_MEAS100 1
+#define CMAMODE_MEAS400 2
+#define CMAMODE_MEAS40 3
+#define CMAMODE_MOTDET 4
+#define CMAMODE_FF100 5
+#define CMAMODE_FF400 6
+#define CMAMODE_POFF 7
+
+#define CMARANGE_2G 2000
+#define CMARANGE_8G 8000
+
+/**
+ * struct cma3000_i2c_platform_data - CMA3000 Platform data
+ * @fuzz_x: Noise on X Axis
+ * @fuzz_y: Noise on Y Axis
+ * @fuzz_z: Noise on Z Axis
+ * @g_range: G range in milli g i.e 2000 or 8000
+ * @mode: Operating mode
+ * @mdthr: Motion detect threshold value
+ * @mdfftmr: Motion detect and free fall time value
+ * @ffthr: Free fall threshold value
+ */
+
+struct cma3000_platform_data {
+ int fuzz_x;
+ int fuzz_y;
+ int fuzz_z;
+ int g_range;
+ uint8_t mode;
+ uint8_t mdthr;
+ uint8_t mdfftmr;
+ uint8_t ffthr;
+ uint32_t irqflags;
+};
+
+#endif
