1 /* drivers/input/sensors/access/dmard10.c
3 * Copyright (C) 2012-2015 ROCKCHIP.
4 * Author: guoyi <gy@rock-chips.com>
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/interrupt.h>
17 #include <linux/i2c.h>
18 #include <linux/slab.h>
19 #include <linux/irq.h>
20 #include <linux/miscdevice.h>
21 #include <linux/gpio.h>
22 #include <asm/uaccess.h>
23 #include <asm/atomic.h>
24 #include <linux/delay.h>
25 #include <linux/input.h>
26 #include <linux/workqueue.h>
27 #include <linux/freezer.h>
28 #include <linux/of_gpio.h>
29 #ifdef CONFIG_HAS_EARLYSUSPEND
30 #include <linux/earlysuspend.h>
32 #include <linux/sensor-dev.h>
34 /* Default register settings */
35 #define RBUFF_SIZE 12 /* Rx buffer size */
39 #define REG_TAPNS 0x0f
40 #define REG_MISC2 0x1f
42 #define REG_CKSEL 0x0d
44 #define REG_STADR 0x12
45 #define REG_STAINT 0x1C
47 #define REG_TCGYZ 0x26
48 #define REG_X_OUT 0x41
51 #define MODE_ResetAtOff 0x01
52 #define MODE_Standby 0x02
53 #define MODE_ResetAtStandby 0x03
54 #define MODE_Active 0x06
55 #define MODE_Trigger 0x0a
56 #define MODE_ReadOTP 0x12
57 #define MODE_WriteOTP 0x22
58 #define MODE_WriteOTPBuf 0x42
59 #define MODE_ResetDataPath 0x82
61 #define VALUE_STADR 0x55
62 #define VALUE_STAINT 0xAA
63 #define VALUE_AFEM_AFEN_Normal 0x8f// AFEN set 1 , ATM[2:0]=b'000(normal),EN_Z/Y/X/T=1
64 #define VALUE_AFEM_Normal 0x0f// AFEN set 0 , ATM[2:0]=b'000(normal),EN_Z/Y/X/T=1
65 #define VALUE_INTC 0x00// INTC[6:5]=b'00
66 #define VALUE_INTC_Interrupt_En 0x20// INTC[6:5]=b'01 (Data ready interrupt enable, active high at INT0)
67 #define VALUE_CKSEL_ODR_0_204 0x04// ODR[3:0]=b'0000 (0.78125Hz), CCK[3:0]=b'0100 (204.8kHZ)
68 #define VALUE_CKSEL_ODR_1_204 0x14// ODR[3:0]=b'0001 (1.5625Hz), CCK[3:0]=b'0100 (204.8kHZ)
69 #define VALUE_CKSEL_ODR_3_204 0x24// ODR[3:0]=b'0010 (3.125Hz), CCK[3:0]=b'0100 (204.8kHZ)
70 #define VALUE_CKSEL_ODR_6_204 0x34// ODR[3:0]=b'0011 (6.25Hz), CCK[3:0]=b'0100 (204.8kHZ)
71 #define VALUE_CKSEL_ODR_12_204 0x44// ODR[3:0]=b'0100 (12.5Hz), CCK[3:0]=b'0100 (204.8kHZ)
72 #define VALUE_CKSEL_ODR_25_204 0x54// ODR[3:0]=b'0101 (25Hz), CCK[3:0]=b'0100 (204.8kHZ)
73 #define VALUE_CKSEL_ODR_50_204 0x64// ODR[3:0]=b'0110 (50Hz), CCK[3:0]=b'0100 (204.8kHZ)
74 #define VALUE_CKSEL_ODR_100_204 0x74// ODR[3:0]=b'0111 (100Hz), CCK[3:0]=b'0100 (204.8kHZ)
76 #define VALUE_TAPNS_NoFilter 0x00 // TAP1/TAP2 NO FILTER
77 #define VALUE_TAPNS_Ave_2 0x11 // TAP1/TAP2 Average 2
78 #define VALUE_TAPNS_Ave_4 0x22 // TAP1/TAP2 Average 4
79 #define VALUE_TAPNS_Ave_8 0x33 // TAP1/TAP2 Average 8
80 #define VALUE_TAPNS_Ave_16 0x44 // TAP1/TAP2 Average 16
81 #define VALUE_TAPNS_Ave_32 0x55 // TAP1/TAP2 Average 32
82 #define VALUE_MISC2_OSCA_EN 0x08
83 #define VALUE_PD_RST 0x52
86 //#define DMARD10_REG_INTSU 0x47
87 //#define DMARD10_REG_MODE 0x44
88 //#define DMARD10_REG_SR 0x44
91 #define DMARD10_REG_DS 0X49
92 #define DMARD10_REG_ID 0X0F
93 #define DMARD10_REG_IT 0X4D
94 #define DMARD10_REG_INTSRC1_C 0X4A
95 #define DMARD10_REG_INTSRC1_S 0X4B
98 // IOCTLs for DMARD10 library
99 #define ECS_IOCTL_INIT _IO(MMAIO, 0x01)
100 #define ECS_IOCTL_RESET _IO(MMAIO, 0x04)
101 #define ECS_IOCTL_CLOSE _IO(MMAIO, 0x02)
102 #define ECS_IOCTL_START _IO(MMAIO, 0x03)
103 #define ECS_IOCTL_GETDATA _IOR(MMAIO, 0x08, char[RBUFF_SIZE+1])
104 #define SENSOR_CALIBRATION _IOWR(MMAIO, 0x05 , int[SENSOR_DATA_SIZE])
107 #define ECS_IOCTL_APP_SET_RATE _IOW(MMAIO, 0x10, char)
110 #define DMARD10_RANGE 2000000
112 #define DMARD10_RATE_32 32
114 #define DMARD10_RATE_64 64
115 #define DMARD10_RATE_120 128
116 #define DMARD10_RATE_MIN DMARD10_RATE_1
117 #define DMARD10_RATE_MAX DMARD10_RATE_120
120 #define DMARD10_OPEN 1
121 #define DMARD10_CLOSE 0
122 #define DMARD10_NORMAL 2
123 #define DMARD10_LOWPOWER 3
127 #define DMARD10_IIC_ADDR 0x18
128 #define DMARD10_REG_LEN 11
131 #define DMARD10_FATOR 15
134 #define DMARD10_X_OUT 0x41
135 #define SENSOR_DATA_SIZE 3
136 #define DMARD10_SENSOR_RATE_1 0
137 #define DMARD10_SENSOR_RATE_2 1
138 #define DMARD10_SENSOR_RATE_3 2
139 #define DMARD10_SENSOR_RATE_4 3
141 #define POWER_OR_RATE 1
143 #define DMARD10_INTERRUPUT 1
144 #define DMARD10_POWERDOWN 0
145 #define DMARD10_POWERON 1
147 //g-senor layout configuration, choose one of the following configuration
150 #define SENSOR_DATA_SIZE 3
151 #define DEFAULT_SENSITIVITY 1024
155 #define DMARD10_ENABLE 1
157 #define DMARD10_REG_X_OUT 0x12
158 #define DMARD10_REG_Y_OUT 0x1
159 #define DMARD10_REG_Z_OUT 0x2
160 #define DMARD10_REG_TILT 0x3
161 #define DMARD10_REG_SRST 0x4
162 #define DMARD10_REG_SPCNT 0x5
163 #define DMARD10_REG_INTSU 0x6
164 #define DMARD10_REG_MODE 0x7
165 #define DMARD10_REG_SR 0x8
166 #define DMARD10_REG_PDET 0x9
167 #define DMARD10_REG_PD 0xa
169 #define DMARD10_RANGE 4000000
170 #define DMARD10_PRECISION 10
171 #define DMARD10_BOUNDARY (0x1 << (DMARD10_PRECISION - 1))
172 #define DMARD10_GRAVITY_STEP (DMARD10_RANGE / DMARD10_BOUNDARY)
175 struct sensor_axis_average {
182 static struct sensor_axis_average axis_average;
183 int gsensor_reset(struct i2c_client *client){
184 struct sensor_private_data *sensor =
185 (struct sensor_private_data *) i2c_get_clientdata(client);
187 char buffer[7], buffer2[2];
188 /* 1. check D10 , VALUE_STADR = 0x55 , VALUE_STAINT = 0xAA */
189 buffer[0] = REG_STADR;
190 buffer2[0] = REG_STAINT;
192 sensor_rx_data(client, buffer, 2);
193 sensor_rx_data(client, buffer2, 2);
195 if( buffer[0] == VALUE_STADR || buffer2[0] == VALUE_STAINT){
196 DBG(KERN_INFO " REG_STADR_VALUE = %d , REG_STAINT_VALUE = %d\n", buffer[0], buffer2[0]);
197 DBG(KERN_INFO " %s DMT_DEVICE_NAME registered I2C driver!\n",__FUNCTION__);
200 DBG(KERN_INFO " %s gsensor I2C err @@@ REG_STADR_VALUE = %d , REG_STAINT_VALUE = %d \n", __func__, buffer[0], buffer2[0]);
203 /* 2. Powerdown reset */
205 buffer[1] = VALUE_PD_RST;
206 sensor_tx_data(client, buffer, 2);
207 /* 3. ACTR => Standby mode => Download OTP to parameter reg => Standby mode => Reset data path => Standby mode */
208 buffer[0] = REG_ACTR;
209 buffer[1] = MODE_Standby;
210 buffer[2] = MODE_ReadOTP;
211 buffer[3] = MODE_Standby;
212 buffer[4] = MODE_ResetDataPath;
213 buffer[5] = MODE_Standby;
214 sensor_tx_data(client, buffer, 6);
215 /* 4. OSCA_EN = 1 ,TSTO = b'000(INT1 = normal, TEST0 = normal) */
216 buffer[0] = REG_MISC2;
217 buffer[1] = VALUE_MISC2_OSCA_EN;
218 sensor_tx_data(client, buffer, 2);
219 /* 5. AFEN = 1(AFE will powerdown after ADC) */
220 buffer[0] = REG_AFEM;
221 buffer[1] = VALUE_AFEM_AFEN_Normal;
222 buffer[2] = VALUE_CKSEL_ODR_100_204;
223 buffer[3] = VALUE_INTC;
224 buffer[4] = VALUE_TAPNS_Ave_2;
225 buffer[5] = 0x00; // DLYC, no delay timing
226 buffer[6] = 0x07; // INTD=1 (push-pull), INTA=1 (active high), AUTOT=1 (enable T)
227 sensor_tx_data(client, buffer, 7);
228 /* 6. write TCGYZ & TCGX */
229 buffer[0] = REG_WDAL; // REG:0x01
230 buffer[1] = 0x00; // set TC of Y,Z gain value
231 buffer[2] = 0x00; // set TC of X gain value
232 buffer[3] = 0x03; // Temperature coefficient of X,Y,Z gain
233 sensor_tx_data(client, buffer, 4);
235 buffer[0] = REG_ACTR; // REG:0x00
236 buffer[1] = MODE_Standby; // Standby
237 buffer[2] = MODE_WriteOTPBuf; // WriteOTPBuf
238 buffer[3] = MODE_Standby; // Standby
240 /* 7. Activation mode */
241 buffer[0] = REG_ACTR;
242 buffer[1] = MODE_Active;
243 sensor_tx_data(client, buffer, 2);
244 printk("\n dmard10 gsensor _reset SUCCESS!!\n");
248 /****************operate according to sensor chip:start************/
250 static int sensor_active(struct i2c_client *client, int enable, int rate)
252 struct sensor_private_data *sensor =
253 (struct sensor_private_data *) i2c_get_clientdata(client);
256 gsensor_reset(client);
257 sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
258 //register setting according to chip datasheet
261 status = DMARD10_ENABLE; //dmard10
262 sensor->ops->ctrl_data |= status;
266 status = ~DMARD10_ENABLE; //dmard10
267 sensor->ops->ctrl_data &= status;
270 DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
271 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
273 printk("%s:fail to active sensor\n",__func__);
279 static int sensor_init(struct i2c_client *client)
281 struct sensor_private_data *sensor =
282 (struct sensor_private_data *) i2c_get_clientdata(client);
285 result = sensor->ops->active(client,0,0);
288 printk("%s:line=%d,error\n",__func__,__LINE__);
292 sensor->status_cur = SENSOR_OFF;
294 DBG("%s:DMARD10_REG_TILT=0x%x\n",__func__,sensor_read_reg(client, DMARD10_REG_TILT));
296 result = sensor_write_reg(client, DMARD10_REG_SR, (0x01<<5)| 0x02); //32 Samples/Second Active and Auto-Sleep Mode
299 printk("%s:line=%d,error\n",__func__,__LINE__);
303 if(sensor->pdata->irq_enable) //open interrupt
305 result = sensor_write_reg(client, DMARD10_REG_INTSU, 1<<4);//enable int,GINT=1
308 printk("%s:line=%d,error\n",__func__,__LINE__);
313 sensor->ops->ctrl_data = 1<<6; //Interrupt output INT is push-pull
314 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
317 printk("%s:line=%d,error\n",__func__,__LINE__);
322 memset(&axis_average, 0, sizeof(struct sensor_axis_average));
328 static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
333 result = ((int)high_byte << 8)|((int)low_byte);
335 if (result < DMARD10_BOUNDARY){
336 result = result* DMARD10_GRAVITY_STEP;
338 result = ~( ((~result & (0x7fff>>(16-DMARD10_PRECISION)) ) + 1)* DMARD10_GRAVITY_STEP) + 1;
345 static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis)
347 struct sensor_private_data *sensor =
348 (struct sensor_private_data *) i2c_get_clientdata(client);
350 /* Report acceleration sensor information */
351 input_report_abs(sensor->input_dev, ABS_X, axis->x);
352 input_report_abs(sensor->input_dev, ABS_Y, axis->y);
353 input_report_abs(sensor->input_dev, ABS_Z, axis->z);
354 input_sync(sensor->input_dev);
355 DBG("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
359 #define DMARD10_COUNT_AVERAGE 2
360 #define GSENSOR_MIN 2
361 static int sensor_report_value(struct i2c_client *client)
363 struct sensor_private_data *sensor =
364 (struct sensor_private_data *) i2c_get_clientdata(client);
365 struct sensor_platform_data *pdata = sensor->pdata;
368 struct sensor_axis axis;
369 char buffer[8] = {0};
372 if(sensor->ops->read_len < 3) //sensor->ops->read_len = 3
374 printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
378 memset(buffer, 0, 8);
379 /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
381 *buffer = sensor->ops->read_reg;
382 ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
387 //this gsensor need 6 bytes buffer
388 x = sensor_convert_data(sensor->client, buffer[3], buffer[2]); //buffer[1]:high bit
389 y = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
390 z = sensor_convert_data(sensor->client, buffer[7], buffer[6]);
392 axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
393 axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
394 axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
397 axis_average.x_average += axis.x;
398 axis_average.y_average += axis.y;
399 axis_average.z_average += axis.z;
400 axis_average.count++;
402 if(axis_average.count >= DMARD10_COUNT_AVERAGE)
404 axis.x = axis_average.x_average / axis_average.count;
405 axis.y = axis_average.y_average / axis_average.count;
406 axis.z = axis_average.z_average / axis_average.count;
408 DBG( "%s: axis = %d %d %d \n", __func__, axis.x, axis.y, axis.z);
410 memset(&axis_average, 0, sizeof(struct sensor_axis_average));
412 //Report event only while value is changed to save some power
413 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))
415 gsensor_report_value(client, &axis);
417 /* »¥³âµØ»º´æÊý¾Ý. */
418 mutex_lock(&(sensor->data_mutex) );
420 mutex_unlock(&(sensor->data_mutex) );
424 if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
427 value = sensor_read_reg(client, sensor->ops->int_status_reg);
428 DBG("%s:sensor int status :0x%x\n",__func__,value);
435 struct sensor_operate gsensor_dmard10_ops = {
436 .name = "gs_dmard10",
437 .type = SENSOR_TYPE_ACCEL, //sensor type and it should be correct
438 .id_i2c = ACCEL_ID_DMARD10, //i2c id number
439 .read_reg = DMARD10_REG_X_OUT, //read data
440 .read_len = 8, //data length
441 .id_reg = SENSOR_UNKNOW_DATA, //read device id from this register
442 .id_data = SENSOR_UNKNOW_DATA, //device id
443 .precision = DMARD10_PRECISION, //12 bit
444 .ctrl_reg = DMARD10_REG_MODE, //enable or disable
445 .int_status_reg = SENSOR_UNKNOW_DATA, //intterupt status register
446 .range = {-DMARD10_RANGE,DMARD10_RANGE}, //range
447 .trig = IRQF_TRIGGER_LOW|IRQF_ONESHOT,
448 .active = sensor_active,
450 .report = sensor_report_value,
453 /****************operate according to sensor chip:end************/
455 //function name should not be changed
456 static struct sensor_operate *gsensor_get_ops(void)
458 return &gsensor_dmard10_ops;
462 static int __init gsensor_dmard10_init(void)
464 struct sensor_operate *ops = gsensor_get_ops();
466 int type = ops->type;
467 result = sensor_register_slave(type, NULL, NULL, gsensor_get_ops);
471 static void __exit gsensor_dmard10_exit(void)
473 struct sensor_operate *ops = gsensor_get_ops();
474 int type = ops->type;
475 sensor_unregister_slave(type, NULL, NULL, gsensor_get_ops);
479 module_init(gsensor_dmard10_init);
480 module_exit(gsensor_dmard10_exit);