Re: [PATCHv4 5/6] Input: add CMR3000 gyrsocope driver
From: Ricardo Ribalda Delgado
Date: Tue Oct 25 2011 - 03:26:52 EST
Hello Grant
It is similar to the crm, because they came from the same
manufacturer and they share some commands, but that is all.
the crm is a gyroscope and the cma is an accelerometer. I tried to put
both drivers together and the result was a bit too messy, I think it
is easier to understand as two separate drivers, but if you believe
they have to live together and help me making it more understandable,
I have to problem in coding it.
Regards!
On Mon, Oct 24, 2011 at 23:40, Grant Likely <grant.likely@xxxxxxxxxxxx> wrote:
> On Mon, Oct 24, 2011 at 10:21:15PM +0200, Ricardo Ribalda Delgado wrote:
>> Add support for CMR3000 Tri-axis accelerometer. CMR3000 supports both
>> I2C/SPI bus communication, currently the driver supports SPI
>> communication, since I have no hardware to test the I2C communication.
>
> How different is this driver from the cma3000? Is it a cut and paste job?
>
> g.
>
>>
>> ---
>>
>> v4: Fixes suggested by Dmitry Torokhov
>> -Do not release the input device until the irq has been released
>>
>> v3: Fixes suggested by Jonathan Cameron
>> -Support DT
>> -Cleaner spi read/write
>>
>> v2: Fixes suggested by Jonathan Cameron
>> -Code Stype
>> -Check pdata!=NULL
>> -SPI align Cacheline
>> -More clear based on
>> -%s/set/write/
>> -%s/accl/gyro/
>> -remove READ/SET macros
>>
>> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
>> ---
>> drivers/input/misc/Kconfig | 24 ++
>> drivers/input/misc/Makefile | 2 +
>> drivers/input/misc/cmr3000_d0x.c | 426 ++++++++++++++++++++++++++++++++++
>> drivers/input/misc/cmr3000_d0x.h | 45 ++++
>> drivers/input/misc/cmr3000_d0x_spi.c | 144 ++++++++++++
>> include/linux/input/cmr3000.h | 54 +++++
>> 6 files changed, 695 insertions(+), 0 deletions(-)
>> create mode 100644 drivers/input/misc/cmr3000_d0x.c
>> create mode 100644 drivers/input/misc/cmr3000_d0x.h
>> create mode 100644 drivers/input/misc/cmr3000_d0x_spi.c
>> create mode 100644 include/linux/input/cmr3000.h
>>
>> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
>> index b9f2e93..7c56f94 100644
>> --- a/drivers/input/misc/Kconfig
>> +++ b/drivers/input/misc/Kconfig
>> @@ -524,6 +524,30 @@ config INPUT_CMA3000_SPI
>> To compile this driver as a module, choose M here: the
>> module will be called cma3000_d0x_spi.
>>
>> +config INPUT_CMR3000
>> + tristate "VTI CMR3000 Tri-axis gyroscope"
>> + help
>> + Say Y here if you want to use VTI CMR3000_D0x Gyroscope
>> + driver
>> +
>> + This driver currently only supports SPI interface to the
>> + controller. Also select the SPI method.
>> +
>> + If unsure, say N
>> +
>> + To compile this driver as a module, choose M here: the
>> + module will be called cmr3000_d0x.
>> +
>> +config INPUT_CMR3000_SPI
>> + tristate "Support SPI bus connection"
>> + depends on INPUT_CMR3000 && SPI
>> + help
>> + Say Y here if you want to use VTI CMR3000_D0x Gyroscope
>> + through SPI interface.
>> +
>> + To compile this driver as a module, choose M here: the
>> + module will be called cmr3000_d0x_spi.
>> +
>> config INPUT_XEN_KBDDEV_FRONTEND
>> tristate "Xen virtual keyboard and mouse support"
>> depends on XEN_FBDEV_FRONTEND
>> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
>> index 7305f6f..c7fe09a 100644
>> --- a/drivers/input/misc/Makefile
>> +++ b/drivers/input/misc/Makefile
>> @@ -21,6 +21,8 @@ obj-$(CONFIG_INPUT_CM109) += cm109.o
>> obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o
>> obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
>> obj-$(CONFIG_INPUT_CMA3000_SPI) += cma3000_d0x_spi.o
>> +obj-$(CONFIG_INPUT_CMR3000) += cmr3000_d0x.o
>> +obj-$(CONFIG_INPUT_CMR3000_SPI) += cmr3000_d0x_spi.o
>> obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
>> obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
>> obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
>> diff --git a/drivers/input/misc/cmr3000_d0x.c b/drivers/input/misc/cmr3000_d0x.c
>> new file mode 100644
>> index 0000000..d046149
>> --- /dev/null
>> +++ b/drivers/input/misc/cmr3000_d0x.c
>> @@ -0,0 +1,426 @@
>> +/*
>> + * VTI CMR3000_D0x Gyroscope driver
>> + *
>> + * Copyright (C) 2011 Qtechnology
>> + * Author: Ricardo Ribalda <ricardo.ribalda@xxxxxxxxx>
>> + *
>> + * Based on:
>> + * drivers/input/misc/cma3000_d0x.c by: Hemanth V
>> + *
>> + * 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/types.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/delay.h>
>> +#include <linux/slab.h>
>> +#include <linux/input.h>
>> +#include <linux/input/cmr3000.h>
>> +#include <linux/of.h>
>> +
>> +#include "cmr3000_d0x.h"
>> +
>> +#define CMR3000_REV 0x21
>> +
>> +#define CMR3000_WHOAMI 0x00
>> +#define CMR3000_REVID 0x01
>> +#define CMR3000_CTRL 0x02
>> +#define CMR3000_STATUS 0x03
>> +#define CMR3000_X_LSB 0x0C
>> +#define CMR3000_X_MSB 0x0D
>> +#define CMR3000_Y_LSB 0x0E
>> +#define CMR3000_Y_MSB 0x0F
>> +#define CMR3000_Z_LSB 0x10
>> +#define CMR3000_Z_MSB 0x11
>> +#define CMR3000_I2C_ADDR 0x22
>> +#define CMR3000_PDR 0x26
>> +
>> +#define CMR3000_IRQDIS (1 << 0)
>> +#define CMR3000_MODEMASK (3 << 1)
>> +#define CMR3000_BUSI2C (0 << 4)
>> +#define CMR3000_BUSSPI (1 << 4)
>> +#define CMR3000_INTLOW (1 << 6)
>> +#define CMR3000_INTHIGH (0 << 6)
>> +#define CMR3000_RST (1 << 7)
>> +
>> +#define CMRMODE_SHIFT 1
>> +#define CMRIRQLEVEL_SHIFT 6
>> +
>> +#define CMR3000_STATUS_PERR (1 << 0)
>> +#define CMR3000_STATUS_PORST (1 << 3)
>> +
>> +/* Settling time delay in ms */
>> +#define CMR3000_SETDELAY 30
>> +
>> +/*
>> + * Bit weights mult/div in dps for bit 0, other bits need
>> + * multipy factor 2^n. 11th bit is the sign bit.
>> + */
>> +#define BIT_TO_DPS_MUL 3
>> +#define BIT_TO_DPS_DIV 32
>> +
>> +static struct cmr3000_platform_data cmr3000_default_pdata = {
>> + .irq_level = CMR3000_INTHIGH,
>> + .mode = CMRMODE_MEAS80,
>> + .fuzz_x = 1,
>> + .fuzz_y = 1,
>> + .fuzz_z = 1,
>> + .irqflags = 0,
>> +};
>> +
>> +struct cmr3000_gyro_data {
>> + const struct cmr3000_bus_ops *bus_ops;
>> + struct cmr3000_platform_data pdata;
>> +
>> + struct device *dev;
>> + struct input_dev *input_dev;
>> +
>> + int irq_level;
>> + u8 mode;
>> +
>> + int bit_to_mg;
>> + int irq;
>> +
>> + struct mutex mutex;
>> + bool opened;
>> + bool suspended;
>> +};
>> +
>> +static void decode_dps(struct cmr3000_gyro_data *data, int *datax,
>> + int *datay, int *dataz)
>> +{
>> + /* Data in 2's complement, convert to dps */
>> + *datax = (((s16) ((*datax) << 2)) * BIT_TO_DPS_MUL) / BIT_TO_DPS_DIV;
>> + *datay = (((s16) ((*datay) << 2)) * BIT_TO_DPS_MUL) / BIT_TO_DPS_DIV;
>> + *dataz = (((s16) ((*dataz) << 2)) * BIT_TO_DPS_MUL) / BIT_TO_DPS_DIV;
>> +}
>> +
>> +static irqreturn_t cmr3000_thread_irq(int irq, void *dev_id)
>> +{
>> + struct cmr3000_gyro_data *data = dev_id;
>> + int datax, datay, dataz;
>> + u8 mode, intr_status;
>> +
>> + intr_status = data->bus_ops->read(data->dev, CMR3000_STATUS,
>> + "irq status");
>> + intr_status = data->bus_ops->read(data->dev, CMR3000_CTRL,
>> + "control mode");
>> + if (intr_status < 0)
>> + return IRQ_NONE;
>> +
>> + /* Interrupt not for this device */
>> + if (intr_status & CMR3000_IRQDIS)
>> + return IRQ_NONE;
>> +
>> + mode = (intr_status & CMR3000_MODEMASK) >> CMRMODE_SHIFT;
>> + if ((mode != CMRMODE_MEAS80)
>> + && (mode != CMRMODE_MEAS20))
>> + return IRQ_NONE;
>> +
>> + datax = (data->bus_ops->read(data->dev, CMR3000_X_MSB, "X_MSB")) << 8;
>> + datax |= data->bus_ops->read(data->dev, CMR3000_X_LSB, "X_LSB");
>> + datay = (data->bus_ops->read(data->dev, CMR3000_Y_MSB, "Y_MSB")) << 8;
>> + datay |= data->bus_ops->read(data->dev, CMR3000_Y_LSB, "Y_LSB");
>> + dataz = (data->bus_ops->read(data->dev, CMR3000_Z_MSB, "Z_MSB")) << 8;
>> + dataz |= data->bus_ops->read(data->dev, CMR3000_Z_LSB, "Z_LSB");
>> +
>> + /* Device closed */
>> + if ((data->mode != CMRMODE_MEAS80)
>> + && (data->mode != CMRMODE_MEAS20))
>> + return IRQ_NONE;
>> +
>> + /* Decode register values to dps */
>> + decode_dps(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 cmr3000_poweron(struct cmr3000_gyro_data *data)
>> +{
>> + const struct cmr3000_platform_data *pdata = &data->pdata;
>> + u8 ctrl;
>> + int ret;
>> +
>> + ctrl = pdata->irq_level << CMRIRQLEVEL_SHIFT;
>> + ctrl |= data->mode << CMRMODE_SHIFT;
>> + ctrl |= data->bus_ops->ctrl_mod;
>> + ret = data->bus_ops->write(data->dev, CMR3000_CTRL, ctrl,
>> + "Mode setting");
>> + if (ret < 0)
>> + return -EIO;
>> +
>> + msleep(CMR3000_SETDELAY);
>> +
>> + return 0;
>> +}
>> +
>> +static int cmr3000_poweroff(struct cmr3000_gyro_data *data)
>> +{
>> + int ret;
>> + u8 ctrl = CMRMODE_POFF;
>> +
>> + ctrl |= data->bus_ops->ctrl_mod;
>> + ctrl |= CMR3000_IRQDIS;
>> +
>> + ret = data->bus_ops->write(data->dev, CMR3000_CTRL, ctrl,
>> + "Mode setting");
>> + msleep(CMR3000_SETDELAY);
>> +
>> + return ret;
>> +}
>> +
>> +static int cmr3000_reset(struct cmr3000_gyro_data *data)
>> +{
>> + int val;
>> +
>> + /* Reset chip */
>> + data->bus_ops->write(data->dev, CMR3000_CTRL, CMR3000_RST, "Reset");
>> + mdelay(2);
>> +
>> + /* Settling time delay */
>> + val = data->bus_ops->read(data->dev, CMR3000_STATUS, "Status");
>> + if (val < 0) {
>> + dev_err(data->dev, "Reset failed\n");
>> + return val;
>> + }
>> +
>> + if (val & CMR3000_STATUS_PERR) {
>> + dev_err(data->dev, "Parity Error\n");
>> + return -EIO;
>> + }
>> +
>> + return cmr3000_poweroff(data);
>> +}
>> +
>> +static int cmr3000_open(struct input_dev *input_dev)
>> +{
>> + struct cmr3000_gyro_data *data = input_get_drvdata(input_dev);
>> +
>> + mutex_lock(&data->mutex);
>> +
>> + if (!data->suspended)
>> + cmr3000_poweron(data);
>> +
>> + data->opened = true;
>> +
>> + mutex_unlock(&data->mutex);
>> +
>> + return 0;
>> +}
>> +
>> +static void cmr3000_close(struct input_dev *input_dev)
>> +{
>> + struct cmr3000_gyro_data *data = input_get_drvdata(input_dev);
>> +
>> + mutex_lock(&data->mutex);
>> +
>> + if (!data->suspended)
>> + cmr3000_poweroff(data);
>> +
>> + data->opened = false;
>> +
>> + mutex_unlock(&data->mutex);
>> +}
>> +
>> +void cmr3000_suspend(struct cmr3000_gyro_data *data)
>> +{
>> + mutex_lock(&data->mutex);
>> +
>> + if (!data->suspended && data->opened)
>> + cmr3000_poweroff(data);
>> +
>> + data->suspended = true;
>> +
>> + mutex_unlock(&data->mutex);
>> +}
>> +EXPORT_SYMBOL(cmr3000_suspend);
>> +
>> +void cmr3000_resume(struct cmr3000_gyro_data *data)
>> +{
>> + mutex_lock(&data->mutex);
>> +
>> + if (data->suspended && data->opened)
>> + cmr3000_poweron(data);
>> +
>> + data->suspended = false;
>> +
>> + mutex_unlock(&data->mutex);
>> +}
>> +EXPORT_SYMBOL(cmr3000_resume);
>> +
>> +#ifdef CONFIG_OF
>> +void cmr3000_get_pdata_of(struct device *dev, struct cmr3000_gyro_data *data)
>> +{
>> + const __be32 *property;
>> + int len;
>> +
>> + property = of_get_property(dev->of_node, "vti,irq_level", &len);
>> + if (property && len == sizeof(int))
>> + data->pdata.irq_level = be32_to_cpup(property);
>> +
>> + property = of_get_property(dev->of_node, "vti,mode", &len);
>> + if (property && len == sizeof(int))
>> + data->pdata.mode = be32_to_cpup(property);
>> +
>> + property = of_get_property(dev->of_node, "vti,fuzz_x", &len);
>> + if (property && len == sizeof(int))
>> + data->pdata.fuzz_x = be32_to_cpup(property);
>> +
>> + property = of_get_property(dev->of_node, "vti,fuzz_y", &len);
>> + if (property && len == sizeof(int))
>> + data->pdata.fuzz_y = be32_to_cpup(property);
>> +
>> + property = of_get_property(dev->of_node, "vti,fuzz_z", &len);
>> + if (property && len == sizeof(int))
>> + data->pdata.fuzz_z = be32_to_cpup(property);
>> +
>> + property = of_get_property(dev->of_node, "vti,irqflags", &len);
>> + if (property && len == sizeof(int))
>> + data->pdata.irqflags = be32_to_cpup(property);
>> +
>> + return;
>> +}
>> +#endif
>> +
>> +struct cmr3000_gyro_data *cmr3000_init(struct device *dev, int irq,
>> + const struct cmr3000_bus_ops *bops)
>> +{
>> + struct cmr3000_platform_data *pdata;
>> + struct cmr3000_gyro_data *data;
>> + struct input_dev *input_dev;
>> + int rev;
>> + int error;
>> +
>> + /* if no IRQ return error */
>> + if (irq == 0) {
>> + error = -EINVAL;
>> + goto err_out;
>> + }
>> +
>> + data = kzalloc(sizeof(struct cmr3000_gyro_data), GFP_KERNEL);
>> + input_dev = input_allocate_device();
>> + if (!data || !input_dev) {
>> + error = -ENOMEM;
>> + goto err_free_mem;
>> + }
>> +
>> + /*Init platform data*/
>> + if (dev->platform_data != NULL) {
>> + memcpy(&data->pdata, dev->platform_data, sizeof(data->pdata));
>> + } else {
>> + memcpy(&data->pdata, &cmr3000_default_pdata,
>> + sizeof(data->pdata));
>> + #ifdef CONFIG_OF
>> + if (dev->of_node != NULL)
>> + cmr3000_get_pdata_of(dev, data);
>> + else
>> + #endif
>> + dev_info(dev, "platform data not found, using default\n");
>> + }
>> + pdata = &data->pdata;
>> +
>> + data->dev = dev;
>> + data->input_dev = input_dev;
>> + data->bus_ops = bops;
>> + data->irq = irq;
>> + mutex_init(&data->mutex);
>> +
>> + data->mode = pdata->mode;
>> + if ((data->mode != CMRMODE_MEAS80)
>> + && (data->mode != CMRMODE_MEAS20)) {
>> + data->mode = CMRMODE_MEAS80;
>> + dev_warn(dev, "Invalid mode specified, assuming 80Hz\n");
>> + }
>> +
>> + data->irq_level = pdata->irq_level;
>> + if ((data->irq_level != CMR3000_INTLOW)
>> + && (data->irq_level != CMR3000_INTHIGH)) {
>> + data->irq_level = CMR3000_INTHIGH;
>> + dev_warn(data->dev,
>> + "Invalid int level specified, assuming high\n");
>> + }
>> +
>> + input_dev->name = "cmr3000-gyroscope";
>> + input_dev->id.bustype = bops->bustype;
>> + input_dev->open = cmr3000_open;
>> + input_dev->close = cmr3000_close;
>> +
>> + __set_bit(EV_ABS, input_dev->evbit);
>> +
>> + input_set_abs_params(input_dev, ABS_X,
>> + -CMRRANGE, CMRRANGE, pdata->fuzz_x, 0);
>> + input_set_abs_params(input_dev, ABS_Y,
>> + -CMRRANGE, CMRRANGE, pdata->fuzz_y, 0);
>> + input_set_abs_params(input_dev, ABS_Z,
>> + -CMRRANGE, CMRRANGE, pdata->fuzz_z, 0);
>> +
>> + input_set_drvdata(input_dev, data);
>> +
>> + error = cmr3000_reset(data);
>> + if (error)
>> + goto err_free_mem;
>> +
>> + rev = data->bus_ops->read(data->dev, CMR3000_REVID, "Revid");
>> + if (rev < 0) {
>> + error = rev;
>> + goto err_free_mem;
>> + }
>> + if (rev != CMR3000_REV) {
>> + error = -EINVAL;
>> + pr_err("CMR3000 Gyroscope: Unknown Revision %x\n", rev);
>> + goto err_free_mem;
>> + }
>> + pr_info("CMR3000 Gyroscope: Revision %x\n", rev);
>> +
>> + error = request_threaded_irq(irq, NULL, cmr3000_thread_irq,
>> + pdata->irqflags | IRQF_ONESHOT,
>> + "cmr3000_d0x", data);
>> + if (error) {
>> + dev_err(dev, "request_threaded_irq failed\n");
>> + goto err_free_mem;
>> + }
>> +
>> + error = input_register_device(data->input_dev);
>> + if (error) {
>> + dev_err(dev, "Unable to register input device\n");
>> + goto err_free_irq;
>> + }
>> +
>> + return data;
>> +
>> +err_free_irq:
>> + free_irq(irq, data);
>> +err_free_mem:
>> + input_free_device(input_dev);
>> + kfree(data);
>> +err_out:
>> + return ERR_PTR(error);
>> +}
>> +EXPORT_SYMBOL(cmr3000_init);
>> +
>> +void cmr3000_exit(struct cmr3000_gyro_data *data)
>> +{
>> + free_irq(data->irq, data);
>> + input_unregister_device(data->input_dev);
>> + kfree(data);
>> +}
>> +EXPORT_SYMBOL(cmr3000_exit);
>> +
>> +MODULE_DESCRIPTION("CMR3000-D0x Gyroscope Driver");
>> +MODULE_LICENSE("GPL");
>> +MODULE_AUTHOR("Ricardo Ribalda <ricardo.ribalda@xxxxxxxxx>");
>> diff --git a/drivers/input/misc/cmr3000_d0x.h b/drivers/input/misc/cmr3000_d0x.h
>> new file mode 100644
>> index 0000000..3d0984a
>> --- /dev/null
>> +++ b/drivers/input/misc/cmr3000_d0x.h
>> @@ -0,0 +1,45 @@
>> +/*
>> + * VTI CMR3000_D0x Gyroscpe driver
>> + *
>> + * Copyright (C) 2011 Qtechnology
>> + * Author: Ricardo Ribalda <ricardo.ribalda@xxxxxxxxx>
>> + *
>> + * Based on:
>> + * drivers/input/misc/cma3000_d0x.h by Hemanth V
>> + *
>> + * 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_CMR3000_H
>> +#define _INPUT_CMR3000_H
>> +
>> +#include <linux/types.h>
>> +#include <linux/input.h>
>> +
>> +struct device;
>> +struct cmr3000_gyro_data;
>> +
>> +struct cmr3000_bus_ops {
>> + u16 bustype;
>> + u8 ctrl_mod;
>> + int (*read) (struct device *, u8, char *);
>> + int (*write) (struct device *, u8, u8, char *);
>> +};
>> +
>> +struct cmr3000_gyro_data *cmr3000_init(struct device *dev, int irq,
>> + const struct cmr3000_bus_ops *bops);
>> +void cmr3000_exit(struct cmr3000_gyro_data *);
>> +void cmr3000_suspend(struct cmr3000_gyro_data *);
>> +void cmr3000_resume(struct cmr3000_gyro_data *);
>> +
>> +#endif
>> diff --git a/drivers/input/misc/cmr3000_d0x_spi.c b/drivers/input/misc/cmr3000_d0x_spi.c
>> new file mode 100644
>> index 0000000..7f27fa3
>> --- /dev/null
>> +++ b/drivers/input/misc/cmr3000_d0x_spi.c
>> @@ -0,0 +1,144 @@
>> +/*
>> + * Implements SPI interface for VTI CMR300_D0x Accelerometer driver
>> + *
>> + * Copyright (C) 2011 Qtechnology
>> + * Author: Ricardo Ribalda <ricardo.ribalda@xxxxxxxxxxxxx>
>> + * Based on:
>> + * drivers/input/misc/cma3000_d0x_i2c.c by Hemanth V
>> + * drivers/input/mis/adxl34x-spi.c by Michael Hennerich
>> + *
>> + * 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/delay.h>
>> +#include <linux/module.h>
>> +#include <linux/spi/spi.h>
>> +#include <linux/input/cmr3000.h>
>> +#include "cmr3000_d0x.h"
>> +
>> +static int cmr3000_spi_write(struct device *dev, u8 reg, u8 val, char *msg)
>> +{
>> + struct spi_device *spi = to_spi_device(dev);
>> + int ret;
>> + u8 tmp[2];
>> +
>> + tmp[0] = (reg << 2) | 2;
>> + tmp[1] = val;
>> +
>> + ret = spi_write_then_read(spi, tmp, sizeof(tmp), NULL, 0);
>> + if (ret < 0) {
>> + dev_err(dev, "%s failed (%s, %d)\n", __func__, msg, ret);
>> + return ret;
>> + }
>> + return 0;
>> +}
>> +
>> +static int cmr3000_spi_read(struct device *dev, u8 reg, char *msg)
>> +{
>> + struct spi_device *spi = to_spi_device(dev);
>> + int ret;
>> +
>> + ret = spi_w8r8(spi, reg << 2);
>> + if (ret < 0)
>> + dev_err(dev, "%s failed (%s, %d)\n", __func__, msg, ret);
>> +
>> + return ret;
>> +}
>> +
>> +static const struct cmr3000_bus_ops cmr3000_spi_bops = {
>> + .bustype = BUS_SPI,
>> +#define CMR3000_BUSSPI (1 << 4)
>> + .ctrl_mod = CMR3000_BUSSPI,
>> + .read = cmr3000_spi_read,
>> + .write = cmr3000_spi_write,
>> +};
>> +
>> +static int __devinit cmr3000_spi_probe(struct spi_device *spi)
>> +{
>> + struct cmr3000_gyro_data *data;
>> +
>> + data = cmr3000_init(&spi->dev, spi->irq, &cmr3000_spi_bops);
>> + if (IS_ERR(data))
>> + return PTR_ERR(data);
>> +
>> + spi_set_drvdata(spi, data);
>> +
>> + return 0;
>> +}
>> +
>> +static int __devexit cmr3000_spi_remove(struct spi_device *spi)
>> +{
>> + struct cmr3000_gyro_data *data = dev_get_drvdata(&spi->dev);
>> +
>> + cmr3000_exit(data);
>> +
>> + return 0;
>> +}
>> +
>> +#ifdef CONFIG_PM
>> +static int cmr3000_spi_suspend(struct device *dev)
>> +{
>> + struct spi_device *spi = to_spi_device(dev);
>> + struct cmr3000_gyro_data *data = dev_get_drvdata(&spi->dev);
>> +
>> + cmr3000_suspend(data);
>> +
>> + return 0;
>> +}
>> +
>> +static int cmr3000_spi_resume(struct device *dev)
>> +{
>> + struct spi_device *spi = to_spi_device(dev);
>> + struct cmr3000_gyro_data *data = dev_get_drvdata(&spi->dev);
>> +
>> + cmr3000_resume(data);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct dev_pm_ops cmr3000_spi_pm_ops = {
>> + .suspend = cmr3000_spi_suspend,
>> + .resume = cmr3000_spi_resume,
>> +};
>> +#endif
>> +
>> +static SIMPLE_DEV_PM_OPS(cmr3000_spi_pm, cmr3000_spi_suspend,
>> + cmr3000_spi_resume);
>> +
>> +static struct spi_driver cmr3000_driver = {
>> + .driver = {
>> + .name = "cmr3000_d01",
>> + .bus = &spi_bus_type,
>> + .owner = THIS_MODULE,
>> + .pm = &cmr3000_spi_pm,
>> + },
>> + .probe = cmr3000_spi_probe,
>> + .remove = __devexit_p(cmr3000_spi_remove),
>> +};
>> +
>> +static int __init cmr3000_spi_init(void)
>> +{
>> + return spi_register_driver(&cmr3000_driver);
>> +}
>> +
>> +static void __exit cmr3000_spi_exit(void)
>> +{
>> + spi_unregister_driver(&cmr3000_driver);
>> +}
>> +
>> +module_init(cmr3000_spi_init);
>> +module_exit(cmr3000_spi_exit);
>> +
>> +MODULE_DESCRIPTION("CMR3000-D0x Gyroscope SPI Driver");
>> +MODULE_LICENSE("GPL");
>> +MODULE_AUTHOR("Ricardo Ribalda <ricardo.ribalda@xxxxxxxxx>");
>> diff --git a/include/linux/input/cmr3000.h b/include/linux/input/cmr3000.h
>> new file mode 100644
>> index 0000000..dfcf9e3
>> --- /dev/null
>> +++ b/include/linux/input/cmr3000.h
>> @@ -0,0 +1,54 @@
>> +/*
>> + * VTI CMR3000_Dxx Gyroscope driver
>> + *
>> + * Copyright (C) 2011 Qtechnology
>> + * Author: Ricardo Ribalda <ricardo.ribalda@xxxxxxxxx>
>> + *
>> + * Based on:
>> + * include/linux/input/cma3000.h by Hemanth V
>> + *
>> + * 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_CMR3000_H
>> +#define _LINUX_CMR3000_H
>> +
>> +#define CMRMODE_DEFAULT 0
>> +#define CMRMODE_STANDBY 1
>> +#define CMRMODE_MEAS20 2
>> +#define CMRMODE_MEAS80 3
>> +#define CMRMODE_POFF 0
>> +
>> +#define CMRIRQLEVEL_LOW 1
>> +#define CMRIRQLEVEL_HIGH 0
>> +
>> +#define CMRRANGE 3072
>> +
>> +/**
>> + * struct cmr3000_platform_data - CMR3000 Platform data
>> + * @fuzz_x: Noise on X Axis
>> + * @fuzz_y: Noise on Y Axis
>> + * @fuzz_z: Noise on Z Axis
>> + * @mode: Operating mode
>> + * @irq_level: Irq level
>> + */
>> +struct cmr3000_platform_data {
>> + int fuzz_x;
>> + int fuzz_y;
>> + int fuzz_z;
>> + uint8_t irq_level;
>> + uint8_t mode;
>> + unsigned long irqflags;
>> +};
>> +
>> +#endif
>> --
>> 1.7.7
>>
>
--
Ricardo Ribalda
--
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