1 /* drivers/input/sensors/access/kxtik.c
2 *
3 * Copyright (C) 2012-2015 ROCKCHIP.
4 * Author: luowei <lw@rock-chips.com>
5 *
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.
9 *
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.
14 *
15 */
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 <linux/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>
31 #endif
32 #include <linux/sensor-dev.h>
33
34 #define KXTIK_DEVID_1004 0x05 //chip id
35 #define KXTIK_DEVID_J9_1005 0x07 //chip id
36 #define KXTIK_DEVID_J2_1009 0x09 //chip id
37 #define KXTIK_DEVID_1013 0x11 //chip id
38 #define KXTIK_RANGE 2000000
39
40 #define KXTIK_XOUT_HPF_L (0x00) /* 0000 0000 */
41 #define KXTIK_XOUT_HPF_H (0x01) /* 0000 0001 */
42 #define KXTIK_YOUT_HPF_L (0x02) /* 0000 0010 */
43 #define KXTIK_YOUT_HPF_H (0x03) /* 0000 0011 */
44 #define KXTIK_ZOUT_HPF_L (0x04) /* 0001 0100 */
45 #define KXTIK_ZOUT_HPF_H (0x05) /* 0001 0101 */
46 #define KXTIK_XOUT_L (0x06) /* 0000 0110 */
47 #define KXTIK_XOUT_H (0x07) /* 0000 0111 */
48 #define KXTIK_YOUT_L (0x08) /* 0000 1000 */
49 #define KXTIK_YOUT_H (0x09) /* 0000 1001 */
50 #define KXTIK_ZOUT_L (0x0A) /* 0001 1010 */
51 #define KXTIK_ZOUT_H (0x0B) /* 0001 1011 */
52 #define KXTIK_ST_RESP (0x0C) /* 0000 1100 */
53 #define KXTIK_WHO_AM_I (0x0F) /* 0000 1111 */
54 #define KXTIK_TILT_POS_CUR (0x10) /* 0001 0000 */
55 #define KXTIK_TILT_POS_PRE (0x11) /* 0001 0001 */
56 #define KXTIK_INT_SRC_REG1 (0x15) /* 0001 0101 */
57 #define KXTIK_INT_SRC_REG2 (0x16) /* 0001 0110 */
58 #define KXTIK_STATUS_REG (0x18) /* 0001 1000 */
59 #define KXTIK_INT_REL (0x1A) /* 0001 1010 */
60 #define KXTIK_CTRL_REG1 (0x1B) /* 0001 1011 */
61 #define KXTIK_CTRL_REG2 (0x1C) /* 0001 1100 */
62 #define KXTIK_CTRL_REG3 (0x1D) /* 0001 1101 */
63 #define KXTIK_INT_CTRL_REG1 (0x1E) /* 0001 1110 */
64 #define KXTIK_INT_CTRL_REG2 (0x1F) /* 0001 1111 */
65 #define KXTIK_INT_CTRL_REG3 (0x20) /* 0010 0000 */
66 #define KXTIK_DATA_CTRL_REG (0x21) /* 0010 0001 */
67 #define KXTIK_TILT_TIMER (0x28) /* 0010 1000 */
68 #define KXTIK_WUF_TIMER (0x29) /* 0010 1001 */
69 #define KXTIK_TDT_TIMER (0x2B) /* 0010 1011 */
70 #define KXTIK_TDT_H_THRESH (0x2C) /* 0010 1100 */
71 #define KXTIK_TDT_L_THRESH (0x2D) /* 0010 1101 */
72 #define KXTIK_TDT_TAP_TIMER (0x2E) /* 0010 1110 */
73 #define KXTIK_TDT_TOTAL_TIMER (0x2F) /* 0010 1111 */
74 #define KXTIK_TDT_LATENCY_TIMER (0x30) /* 0011 0000 */
75 #define KXTIK_TDT_WINDOW_TIMER (0x31) /* 0011 0001 */
76 #define KXTIK_WUF_THRESH (0x5A) /* 0101 1010 */
77 #define KXTIK_TILT_ANGLE (0x5C) /* 0101 1100 */
78 #define KXTIK_HYST_SET (0x5F) /* 0101 1111 */
79
80 /* CONTROL REGISTER 1 BITS */
81 #define KXTIK_DISABLE 0x7F
82 #define KXTIK_ENABLE (1 << 7)
83 /* INPUT_ABS CONSTANTS */
84 #define FUZZ 3
85 #define FLAT 3
86 /* RESUME STATE INDICES */
87 #define RES_DATA_CTRL 0
88 #define RES_CTRL_REG1 1
89 #define RES_INT_CTRL1 2
90 #define RESUME_ENTRIES 3
91
92 /* CTRL_REG1: set resolution, g-range, data ready enable */
93 /* Output resolution: 8-bit valid or 12-bit valid */
94 #define KXTIK_RES_8BIT 0
95 #define KXTIK_RES_12BIT (1 << 6)
96 /* Output g-range: +/-2g, 4g, or 8g */
97 #define KXTIK_G_2G 0
98 #define KXTIK_G_4G (1 << 3)
99 #define KXTIK_G_8G (1 << 4)
100
101 /* DATA_CTRL_REG: controls the output data rate of the part */
102 #define KXTIK_ODR12_5F 0
103 #define KXTIK_ODR25F 1
104 #define KXTIK_ODR50F 2
105 #define KXTIK_ODR100F 3
106 #define KXTIK_ODR200F 4
107 #define KXTIK_ODR400F 5
108 #define KXTIK_ODR800F 6
109
110 /* kxtik */
111 #define KXTIK_PRECISION 12
112 #define KXTIK_BOUNDARY (0x1 << (KXTIK_PRECISION - 1))
113 #define KXTIK_GRAVITY_STEP KXTIK_RANGE / KXTIK_BOUNDARY
114
115
116 /****************operate according to sensor chip:start************/
117
sensor_active(struct i2c_client * client,int enable,int rate)118 static int sensor_active(struct i2c_client *client, int enable, int rate)
119 {
120 struct sensor_private_data *sensor =
121 (struct sensor_private_data *) i2c_get_clientdata(client);
122 int result = 0;
123 int status = 0;
124
125 sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
126
127 //register setting according to chip datasheet
128 if(enable)
129 {
130 status = KXTIK_ENABLE; //kxtik
131 sensor->ops->ctrl_data |= status;
132 }
133 else
134 {
135 status = ~KXTIK_ENABLE; //kxtik
136 sensor->ops->ctrl_data &= status;
137 }
138
139 DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
140 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
141 if(result)
142 printk("%s:fail to active sensor\n",__func__);
143
144 return result;
145
146 }
147
sensor_init(struct i2c_client * client)148 static int sensor_init(struct i2c_client *client)
149 {
150 struct sensor_private_data *sensor =
151 (struct sensor_private_data *) i2c_get_clientdata(client);
152 int result = 0;
153 int i = 0;
154 unsigned char id_reg = KXTIK_WHO_AM_I;
155 unsigned char id_data = 0;
156
157 result = sensor->ops->active(client,0,0);
158 if(result)
159 {
160 printk("%s:line=%d,error\n",__func__,__LINE__);
161 return result;
162 }
163
164 sensor->status_cur = SENSOR_OFF;
165
166 for(i=0; i<3; i++)
167 {
168 result = sensor_rx_data(client, &id_reg, 1);
169 id_data = id_reg;
170 if(!result)
171 break;
172 }
173
174 if(result)
175 {
176 printk("%s:fail to read id,result=%d\n",__func__, result);
177 return result;
178 }
179
180 sensor->devid = id_data;
181
182 result = sensor_write_reg(client, KXTIK_DATA_CTRL_REG, KXTIK_ODR400F);
183 if(result)
184 {
185 printk("%s:line=%d,error\n",__func__,__LINE__);
186 return result;
187 }
188
189 if(sensor->pdata->irq_enable) //open interrupt
190 {
191
192 if (id_data == KXTIK_DEVID_1004)
193 result = sensor_write_reg(client, KXTIK_INT_CTRL_REG1, 0x34);//enable int,active high,need read INT_REL
194 else
195 result = sensor_write_reg(client, KXTIK_INT_CTRL_REG1, 0x30);//enable int,active high,need read INT_REL
196
197 if(result)
198 {
199 printk("%s:line=%d,error\n",__func__,__LINE__);
200 return result;
201 }
202 }
203
204 sensor->ops->ctrl_data = (KXTIK_RES_12BIT | KXTIK_G_2G);
205 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
206 if(result)
207 {
208 printk("%s:line=%d,error\n",__func__,__LINE__);
209 return result;
210 }
211
212 printk("%s:%s id=0x%x\n",__func__,sensor->ops->name, id_data);
213 return result;
214 }
215
sensor_convert_data(struct i2c_client * client,char high_byte,char low_byte)216 static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
217 {
218 s64 result;
219 struct sensor_private_data *sensor =
220 (struct sensor_private_data *) i2c_get_clientdata(client);
221 //int precision = sensor->ops->precision;
222 switch (sensor->devid) {
223 case KXTIK_DEVID_1004:
224 case KXTIK_DEVID_1013:
225 case KXTIK_DEVID_J9_1005:
226 case KXTIK_DEVID_J2_1009:
227 result = (((int)high_byte << 8) | ((int)low_byte ))>>4;
228 result *= 16;
229 break;
230
231 default:
232 printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__);
233 return -EFAULT;
234 }
235 return (int)result;
236 }
237
gsensor_report_value(struct i2c_client * client,struct sensor_axis * axis)238 static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis)
239 {
240 struct sensor_private_data *sensor =
241 (struct sensor_private_data *) i2c_get_clientdata(client);
242
243 if (sensor->status_cur == SENSOR_ON) {
244 /* Report acceleration sensor information */
245 input_report_abs(sensor->input_dev, ABS_X, axis->x);
246 input_report_abs(sensor->input_dev, ABS_Y, axis->y);
247 input_report_abs(sensor->input_dev, ABS_Z, axis->z);
248 input_sync(sensor->input_dev);
249 }
250
251 return 0;
252 }
253
254 #define GSENSOR_MIN 10
sensor_report_value(struct i2c_client * client)255 static int sensor_report_value(struct i2c_client *client)
256 {
257 struct sensor_private_data *sensor =
258 (struct sensor_private_data *) i2c_get_clientdata(client);
259 struct sensor_platform_data *pdata = sensor->pdata;
260 int ret = 0;
261 int x,y,z;
262 struct sensor_axis axis;
263 char buffer[6] = {0};
264 char value = 0;
265
266 if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
267 {
268 printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
269 return -1;
270 }
271
272 memset(buffer, 0, 6);
273
274 /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
275 do {
276 *buffer = sensor->ops->read_reg;
277 ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
278 if (ret < 0)
279 return ret;
280 } while (0);
281
282 //this gsensor need 6 bytes buffer
283 x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit
284 y = sensor_convert_data(sensor->client, buffer[3], buffer[2]);
285 z = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
286
287 axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
288 axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
289 axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
290
291 gsensor_report_value(client, &axis);
292
293 mutex_lock(&sensor->data_mutex);
294 sensor->axis = axis;
295 mutex_unlock(&sensor->data_mutex);
296
297 if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
298 {
299
300 value = sensor_read_reg(client, sensor->ops->int_status_reg);
301 DBG("%s:sensor int status :0x%x\n",__func__,value);
302 }
303
304 return ret;
305 }
306
307 static struct sensor_operate gsensor_kxtik_ops = {
308 .name = "kxtik",
309 .type = SENSOR_TYPE_ACCEL,
310 .id_i2c = ACCEL_ID_KXTIK,
311 .read_reg = KXTIK_XOUT_L,
312 .read_len = 6,
313 .id_reg = SENSOR_UNKNOW_DATA,
314 .id_data = SENSOR_UNKNOW_DATA,
315 .precision = KXTIK_PRECISION,
316 .ctrl_reg = KXTIK_CTRL_REG1,
317 .int_status_reg = KXTIK_INT_REL,
318 .range = {-32768, 32768},
319 .trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT,
320 .active = sensor_active,
321 .init = sensor_init,
322 .report = sensor_report_value,
323 };
324
325 /****************operate according to sensor chip:end************/
gsensor_kxtik_probe(struct i2c_client * client,const struct i2c_device_id * devid)326 static int gsensor_kxtik_probe(struct i2c_client *client,
327 const struct i2c_device_id *devid)
328 {
329 return sensor_register_device(client, NULL, devid, &gsensor_kxtik_ops);
330 }
331
gsensor_kxtik_remove(struct i2c_client * client)332 static int gsensor_kxtik_remove(struct i2c_client *client)
333 {
334 return sensor_unregister_device(client, NULL, &gsensor_kxtik_ops);
335 }
336
337 static const struct i2c_device_id gsensor_kxtik_id[] = {
338 {"gs_kxtik", ACCEL_ID_KXTIK},
339 {}
340 };
341
342 static struct i2c_driver gsensor_kxtik_driver = {
343 .probe = gsensor_kxtik_probe,
344 .remove = gsensor_kxtik_remove,
345 .shutdown = sensor_shutdown,
346 .id_table = gsensor_kxtik_id,
347 .driver = {
348 .name = "gsensor_kxtik",
349 #ifdef CONFIG_PM
350 .pm = &sensor_pm_ops,
351 #endif
352 },
353 };
354
355 module_i2c_driver(gsensor_kxtik_driver);
356
357 MODULE_AUTHOR("luowei <lw@rock-chips.com>");
358 MODULE_DESCRIPTION("kxtik 3-Axis accelerometer driver");
359 MODULE_LICENSE("GPL");
360