From: gy@rock-chips.com Date: Thu, 22 Nov 2012 08:27:11 +0000 (+0800) Subject: add gsensor mxc6225 X-Git-Tag: firefly_0821_release~8188 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b181f0746982a3a36bf27d07bab72ecf2844c8c9;p=firefly-linux-kernel-4.4.55.git add gsensor mxc6225 --- diff --git a/drivers/input/sensors/accel/Kconfig b/drivers/input/sensors/accel/Kconfig index 1ded64e9a524..4e62ea91df30 100755 --- a/drivers/input/sensors/accel/Kconfig +++ b/drivers/input/sensors/accel/Kconfig @@ -33,6 +33,12 @@ config GS_MMA7660 To have support for your specific gsesnor you will have to select the proper drivers which depend on this option. +config GS_MXC6225 + bool "gsensor mxc6225" + help + To have support for your sepcific gsensor you will have to + select het proper drivers which depend on this option. + config GS_BMA023 bool "gsensor bma023" help diff --git a/drivers/input/sensors/accel/Makefile b/drivers/input/sensors/accel/Makefile index 1f9ac9adcf80..67226f173770 100755 --- a/drivers/input/sensors/accel/Makefile +++ b/drivers/input/sensors/accel/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_GS_KXTIK) += kxtik.o obj-$(CONFIG_GS_MMA8452) += mma8452.o obj-$(CONFIG_GS_LIS3DH) += lis3dh.o -obj-$(CONFIG_GS_MMA7660) += mma7660.o \ No newline at end of file +obj-$(CONFIG_GS_MMA7660) += mma7660.o +obj-$(CONFIG_GS_MXC6225) += mxc622x.o diff --git a/drivers/input/sensors/accel/mxc622x.c b/drivers/input/sensors/accel/mxc622x.c new file mode 100644 index 000000000000..045a87602f86 --- /dev/null +++ b/drivers/input/sensors/accel/mxc622x.c @@ -0,0 +1,312 @@ +/* drivers/input/sensors/access/mxc6225.c + * + * Copyright (C) 2012-2015 ROCKCHIP. + * Author: luowei + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef CONFIG_HAS_EARLYSUSPEND +#include +#endif +#include + +#if 0 +#define SENSOR_DEBUG_TYPE SENSOR_TYPE_ACCEL +#define DBG(x...) if(sensor->pdata->type == SENSOR_DEBUG_TYPE) printk(x) +#else +#define DBG(x...) +#endif + +#define MXC6225_ENABLE 1 + +#define MXC6225_REG_DATA 0x00 +#define MXC6225_REG_TILT 0x3 +#define MXC6225_REG_SRST 0x4 +#define MXC6225_REG_SPCNT 0x5 +#define MXC6225_REG_INTSU 0x6 +#define MXC6225_REG_MODE 0x7 +#define MXC6225_REG_SR 0x8 +#define MXC6225_REG_PDET 0x9 +#define MXC6225_REG_PD 0xa + + +#define MXC6225_RANGE 2000000//1500000 + +/* LIS3DH */ +#define MXC6225_PRECISION 8 // 8bit data +#define MXC6225_BOUNDARY (0x1 << (MXC6225_PRECISION - 1)) +#define MXC6225_GRAVITY_STEP 15625 // (MXC6225_RANGE / MXC6225_BOUNDARY) + +#define MXC6225_COUNT_AVERAGE 2 + +struct sensor_axis_average { + int x_average; + int y_average; + int z_average; + int count; +}; + +static struct sensor_axis_average axis_average; + +/****************operate according to sensor chip:start************/ + +static int sensor_active(struct i2c_client *client, int enable, int rate) +{ + struct sensor_private_data *sensor = + (struct sensor_private_data *) i2c_get_clientdata(client); + int result = 0; + int status = 0; + + sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg); + + //register setting according to chip datasheet + if(enable) + { + status = MXC6225_ENABLE; //mxc6225 + sensor->ops->ctrl_data |= status; + } + else + { + status = ~MXC6225_ENABLE; //mxc6225 + sensor->ops->ctrl_data &= status; + } + + DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable); + result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data); + if(result) + printk("%s:fail to active sensor\n",__func__); + + return result; + +} + +static int sensor_init(struct i2c_client *client) +{ + struct sensor_private_data *sensor = + (struct sensor_private_data *) i2c_get_clientdata(client); + int result = 0; + + result = sensor->ops->active(client,0,0); + if(result) + { + printk("%s:line=%d,error\n",__func__,__LINE__); + return result; + } + + sensor->status_cur = SENSOR_OFF; + + //DBG("%s:MXC6225_REG_TILT=0x%x\n",__func__,sensor_read_reg(client, MXC6225_REG_TILT)); + + result = sensor_write_reg(client, MXC6225_REG_SR, (0x01<<5)| 0x02); //32 Samples/Second Active and Auto-Sleep Mode + if(result) + { + printk("%s:line=%d,error\n",__func__,__LINE__); + return result; + } + + if(sensor->pdata->irq_enable) //open interrupt + { + result = sensor_write_reg(client, MXC6225_REG_INTSU, 1<<4);//enable int,GINT=1 + if(result) + { + printk("%s:line=%d,error\n",__func__,__LINE__); + return result; + } + } + + sensor->ops->ctrl_data = 1<<8; //Interrupt output INT is push-pull + result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data); + if(result) + { + printk("%s:line=%d,error\n",__func__,__LINE__); + return result; + } + + + memset(&axis_average, 0, sizeof(struct sensor_axis_average)); + + return result; +} + + +static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte) +{ + s64 result; + struct sensor_private_data *sensor = + (struct sensor_private_data *) i2c_get_clientdata(client); + //int precision = sensor->ops->precision; + + result = (int)low_byte; + if (result < MXC6225_BOUNDARY) + result = result* MXC6225_GRAVITY_STEP; + else + result = ~(((~result & 0x7f) + 1) * MXC6225_GRAVITY_STEP) + 1; + + return (int)result; +} + +static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis) +{ + struct sensor_private_data *sensor = + (struct sensor_private_data *) i2c_get_clientdata(client); + + /* Report acceleration sensor information */ + input_report_abs(sensor->input_dev, ABS_X, axis->x); + input_report_abs(sensor->input_dev, ABS_X, axis->y); + input_report_abs(sensor->input_dev, ABS_Z, axis->z); + input_sync(sensor->input_dev); + DBG("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z); + + return 0; +} + +#define GSENSOR_MIN 2 +static int sensor_report_value(struct i2c_client *client) +{ + struct sensor_private_data *sensor = + (struct sensor_private_data *) i2c_get_clientdata(client); + struct sensor_platform_data *pdata = sensor->pdata; + int ret = 0; + int x,y,z; + struct sensor_axis axis; + char buffer[3] = {0}; + char value = 0; + + if(sensor->ops->read_len < 3) //sensor->ops->read_len = 3 + { + printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len); + return -1; + } + + memset(buffer, 0, 3); + + /* Data bytes from hardware xL, xH, yL, yH, zL, zH */ + do { + *buffer = sensor->ops->read_reg; + ret = sensor_rx_data(client, buffer, sensor->ops->read_len); + if (ret < 0) + return ret; + } while (0); + + + //this gsensor need 6 bytes buffer + x = sensor_convert_data(sensor->client, 0, buffer[0]); //buffer[1]:high bit + y = sensor_convert_data(sensor->client, 0, buffer[1]); + z = sensor_convert_data(sensor->client, 0, buffer[2]); + + axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z; + axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z; + axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z; + + + axis_average.x_average += axis.x; + axis_average.y_average += axis.y; + axis_average.z_average += axis.z; + axis_average.count++; + + if(axis_average.count >= MXC6225_COUNT_AVERAGE) + { + axis.x = axis_average.x_average / axis_average.count; + axis.y = axis_average.y_average / axis_average.count; + axis.z = axis_average.z_average / axis_average.count; + + DBG( "%s: axis = %d %d %d \n", __func__, axis.x, axis.y, axis.z); + + memset(&axis_average, 0, sizeof(struct sensor_axis_average)); + + //Report event only while value is changed to save some power + if((abs(sensor->axis.x - axis.x) > GSENSOR_MIN) || (abs(sensor->axis.y - axis.y) > GSENSOR_MIN) || (abs(sensor->axis.z - axis.z) > GSENSOR_MIN)) + { + gsensor_report_value(client, &axis); + + /* »¥³âµØ»º´æÊý¾Ý. */ + mutex_lock(&(sensor->data_mutex) ); + sensor->axis = axis; + mutex_unlock(&(sensor->data_mutex) ); + } + } + + if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register + { + + value = sensor_read_reg(client, sensor->ops->int_status_reg); + DBG("%s:sensor int status :0x%x\n",__func__,value); + } + + return ret; +} + + +struct sensor_operate gsensor_mxc6225_ops = { + .name = "mxc6225", + .type = SENSOR_TYPE_ACCEL, //sensor type and it should be correct + .id_i2c = ACCEL_ID_MXC6225, //i2c id number + .read_reg = MXC6225_REG_DATA, //read data + .read_len = 3, //data length + .id_reg = SENSOR_UNKNOW_DATA, //read device id from this register + .id_data = SENSOR_UNKNOW_DATA, //device id + .precision = MXC6225_PRECISION, //12 bit + .ctrl_reg = MXC6225_REG_MODE, //enable or disable + .int_status_reg = SENSOR_UNKNOW_DATA, //intterupt status register + .range = {-MXC6225_RANGE,MXC6225_RANGE}, //range + .trig = IRQF_TRIGGER_LOW |IRQF_ONESHOT, + .active = sensor_active, + .init = sensor_init, + .report = sensor_report_value, +}; + +/****************operate according to sensor chip:end************/ + +//function name should not be changed +static struct sensor_operate *gsensor_get_ops(void) +{ + return &gsensor_mxc6225_ops; +} + + +static int __init gsensor_mxc6225_init(void) +{ + struct sensor_operate *ops = gsensor_get_ops(); + int result = 0; + int type = ops->type; + + result = sensor_register_slave(type, NULL, NULL, gsensor_get_ops); + DBG("%s\n",__func__); + return result; +} + +static void __exit gsensor_mxc6225_exit(void) +{ + struct sensor_operate *ops = gsensor_get_ops(); + int type = ops->type; + sensor_unregister_slave(type, NULL, NULL, gsensor_get_ops); +} + + +module_init(gsensor_mxc6225_init); +module_exit(gsensor_mxc6225_exit); + + + diff --git a/drivers/input/sensors/sensor-dev.c b/drivers/input/sensors/sensor-dev.c index 5ae58ff2d64d..ea2b4172c57b 100755 --- a/drivers/input/sensors/sensor-dev.c +++ b/drivers/input/sensors/sensor-dev.c @@ -1400,6 +1400,7 @@ static const struct i2c_device_id sensor_id[] = { {"gs_kxtik", ACCEL_ID_KXTIK}, {"gs_lis3dh", ACCEL_ID_LIS3DH}, {"gs_mma7660", ACCEL_ID_MMA7660}, + {"gs_mxc6225", ACCEL_ID_MXC6225}, /*compass*/ {"compass", COMPASS_ID_ALL}, {"ak8975", COMPASS_ID_AK8975}, diff --git a/include/linux/sensor-dev.h b/include/linux/sensor-dev.h index efabb62369c1..7841b1782fdd 100755 --- a/include/linux/sensor-dev.h +++ b/include/linux/sensor-dev.h @@ -54,6 +54,7 @@ enum sensor_id { ACCEL_ID_MMA845X, ACCEL_ID_MMA7660, ACCEL_ID_MPU6050, + ACCEL_ID_MXC6225, COMPASS_ID_ALL, COMPASS_ID_AK8975,