1 /* drivers/input/sensors/access/mma8452.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 /* Default register settings */
35 #define RBUFF_SIZE 12 /* Rx buffer size */
36
37 #define MMA8452_REG_STATUS 0x0 //RO
38 #define MMA8452_REG_X_OUT_MSB 0x1 //RO
39 #define MMA8452_REG_X_OUT_LSB 0x2 //RO
40 #define MMA8452_REG_Y_OUT_MSB 0x3 //RO
41 #define MMA8452_REG_Y_OUT_LSB 0x4 //RO
42 #define MMA8452_REG_Z_OUT_MSB 0x5 //RO
43 #define MMA8452_REG_Z_OUT_LSB 0x6 //RO
44 #define MMA8452_REG_F_SETUP 0x9 //RW
45
46 #define MMA8452_REG_SYSMOD 0xB //RO
47 #define MMA8452_REG_INTSRC 0xC //RO
48 #define MMA8452_REG_WHO_AM_I 0xD //RO
49 #define MMA8452_REG_XYZ_DATA_CFG 0xE //RW
50 #define MMA8452_REG_HP_FILTER_CUTOFF 0xF //RW
51 #define MMA8452_REG_PL_STATUS 0x10 //RO
52 #define MMA8452_REG_PL_CFG 0x11 //RW
53 #define MMA8452_REG_PL_COUNT 0x12 //RW
54 #define MMA8452_REG_PL_BF_ZCOMP 0x13 //RW
55 #define MMA8452_REG_P_L_THS_REG 0x14 //RW
56 #define MMA8452_REG_FF_MT_CFG 0x15 //RW
57 #define MMA8452_REG_FF_MT_SRC 0x16 //RO
58 #define MMA8452_REG_FF_MT_THS 0x17 //RW
59 #define MMA8452_REG_FF_MT_COUNT 0x18 //RW
60 #define MMA8452_REG_TRANSIENT_CFG 0x1D //RW
61 #define MMA8452_REG_TRANSIENT_SRC 0x1E //RO
62 #define MMA8452_REG_TRANSIENT_THS 0x1F //RW
63 #define MMA8452_REG_TRANSIENT_COUNT 0x20 //RW
64 #define MMA8452_REG_PULSE_CFG 0x21 //RW
65 #define MMA8452_REG_PULSE_SRC 0x22 //RO
66 #define MMA8452_REG_PULSE_THSX 0x23 //RW
67 #define MMA8452_REG_PULSE_THSY 0x24 //RW
68 #define MMA8452_REG_PULSE_THSZ 0x25 //RW
69 #define MMA8452_REG_PULSE_TMLT 0x26 //RW
70 #define MMA8452_REG_PULSE_LTCY 0x27 //RW
71 #define MMA8452_REG_PULSE_WIND 0x28 //RW
72 #define MMA8452_REG_ASLP_COUNT 0x29 //RW
73 #define MMA8452_REG_CTRL_REG1 0x2A //RW
74 #define MMA8452_REG_CTRL_REG2 0x2B //RW
75 #define MMA8452_REG_CTRL_REG3 0x2C //RW
76 #define MMA8452_REG_CTRL_REG4 0x2D //RW
77 #define MMA8452_REG_CTRL_REG5 0x2E //RW
78 #define MMA8452_REG_OFF_X 0x2F //RW
79 #define MMA8452_REG_OFF_Y 0x30 //RW
80 #define MMA8452_REG_OFF_Z 0x31 //RW
81
82 /*rate*/
83 #define MMA8452_RATE_800 0
84 #define MMA8452_RATE_400 1
85 #define MMA8452_RATE_200 2
86 #define MMA8452_RATE_100 3
87 #define MMA8452_RATE_50 4
88 #define MMA8452_RATE_12P5 5
89 #define MMA8452_RATE_6P25 6
90 #define MMA8452_RATE_1P56 7
91 #define MMA8452_RATE_SHIFT 3
92
93
94 #define MMA8452_ASLP_RATE_50 0
95 #define MMA8452_ASLP_RATE_12P5 1
96 #define MMA8452_ASLP_RATE_6P25 2
97 #define MMA8452_ASLP_RATE_1P56 3
98 #define MMA8452_ASLP_RATE_SHIFT 6
99
100 /*Auto-adapt mma845x series*/
101 /*Modified by Yick @ROCKCHIP
102 xieyi@rockchips.com*/
103 /*
104 Range: unit(ug 1g=1 000 000 ug)
105 option(2g,4g,8g)
106 G would be defined on android HAL
107 Precision: bit wide of valid data
108 Boundary: Max positive count
109 Gravity_step: gravity value indicated by per count
110 */
111 #define FREAD_MASK 0 /* enabled(1<<1) only if reading MSB 8bits*/
112 #define MMA845X_RANGE (16384 * 2)
113 /* mma8451 */
114 #define MMA8451_PRECISION 14
115 #define MMA8451_BOUNDARY (0x1 << (MMA8451_PRECISION - 1))
116 #define MMA8451_GRAVITY_STEP (MMA845X_RANGE / MMA8451_BOUNDARY)
117
118 /* mma8452 */
119 #define MMA8452_PRECISION 12
120 #define MMA8452_BOUNDARY (0x1 << (MMA8452_PRECISION - 1))
121 #define MMA8452_GRAVITY_STEP (MMA845X_RANGE / MMA8452_BOUNDARY)
122
123 /* mma8453 */
124 #define MMA8453_PRECISION 10
125 #define MMA8453_BOUNDARY (0x1 << (MMA8453_PRECISION - 1))
126 #define MMA8453_GRAVITY_STEP (MMA845X_RANGE / MMA8453_BOUNDARY)
127
128 /* mma8653 */
129 #define MMA8653_PRECISION 10
130 #define MMA8653_BOUNDARY (0x1 << (MMA8653_PRECISION - 1))
131 #define MMA8653_GRAVITY_STEP (MMA845X_RANGE / MMA8653_BOUNDARY)
132
133
134 #define MMA8451_DEVID 0x1a
135 #define MMA8452_DEVID 0x2a
136 #define MMA8453_DEVID 0x3a
137 #define MMA8653_DEVID 0x5a
138
139
140 #define MMA8452_ENABLE 1
141
142
143 /****************operate according to sensor chip:start************/
144
sensor_active(struct i2c_client * client,int enable,int rate)145 static int sensor_active(struct i2c_client *client, int enable, int rate)
146 {
147 struct sensor_private_data *sensor =
148 (struct sensor_private_data *) i2c_get_clientdata(client);
149 int result = 0;
150 int status = 0;
151
152 sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
153
154 //register setting according to chip datasheet
155 if(enable)
156 {
157 status = MMA8452_ENABLE; //mma8452
158 sensor->ops->ctrl_data |= status;
159 }
160 else
161 {
162 status = ~MMA8452_ENABLE; //mma8452
163 sensor->ops->ctrl_data &= status;
164 }
165
166 DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
167 result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
168 if(result)
169 printk("%s:fail to active sensor\n",__func__);
170
171 return result;
172
173 }
174
sensor_init(struct i2c_client * client)175 static int sensor_init(struct i2c_client *client)
176 {
177 int tmp;
178 int ret = 0;
179 int i = 0;
180 unsigned char id_reg = MMA8452_REG_WHO_AM_I;
181 unsigned char id_data = 0;
182 struct sensor_private_data *sensor =
183 (struct sensor_private_data *) i2c_get_clientdata(client);
184
185 ret = sensor->ops->active(client,0,0);
186 if(ret)
187 {
188 printk("%s:line=%d,error\n",__func__,__LINE__);
189 return ret;
190 }
191
192 sensor->status_cur = SENSOR_OFF;
193
194 for(i=0; i<3; i++)
195 {
196 ret = sensor_rx_data(client, &id_reg, 1);
197 id_data = id_reg;
198 if(!ret)
199 break;
200 }
201
202 if(ret)
203 {
204 printk("%s:fail to read id,ret=%d\n",__func__, ret);
205 return ret;
206 }
207
208 sensor->devid = id_data;
209
210 /* disable FIFO FMODE = 0*/
211 ret = sensor_write_reg(client,MMA8452_REG_F_SETUP,0);
212 DBG("%s: MMA8452_REG_F_SETUP:%x\n",__func__, sensor_read_reg(client,MMA8452_REG_F_SETUP));
213
214 /* set full scale range to 2g */
215 ret = sensor_write_reg(client,MMA8452_REG_XYZ_DATA_CFG,0);
216 DBG("%s: MMA8452_REG_XYZ_DATA_CFG:%x\n",__func__, sensor_read_reg(client,MMA8452_REG_XYZ_DATA_CFG));
217
218 /* set bus 8bit/14bit(FREAD = 1,FMODE = 0) ,data rate*/
219 tmp = (MMA8452_RATE_12P5<< MMA8452_RATE_SHIFT) | FREAD_MASK;
220 ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG1,tmp);
221
222 sensor->ops->ctrl_data = tmp;
223
224 DBG("mma8452 MMA8452_REG_CTRL_REG1:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG1));
225
226 DBG("mma8452 MMA8452_REG_SYSMOD:%x\n",sensor_read_reg(client,MMA8452_REG_SYSMOD));
227
228 ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG3,5);
229 DBG("mma8452 MMA8452_REG_CTRL_REG3:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG3));
230
231 ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG4,1);
232 DBG("mma8452 MMA8452_REG_CTRL_REG4:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG4));
233
234 ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG5,1);
235 DBG("mma8452 MMA8452_REG_CTRL_REG5:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG5));
236
237 DBG("mma8452 MMA8452_REG_SYSMOD:%x\n",sensor_read_reg(client,MMA8452_REG_SYSMOD));
238
239 return ret;
240 }
241
sensor_convert_data(struct i2c_client * client,char high_byte,char low_byte)242 static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
243 {
244 s64 result;
245 struct sensor_private_data *sensor =
246 (struct sensor_private_data *) i2c_get_clientdata(client);
247 //int precision = sensor->ops->precision;
248 switch (sensor->devid) {
249 case MMA8451_DEVID:
250 swap(high_byte,low_byte);
251 result = ((int)high_byte << (MMA8451_PRECISION-8))
252 | ((int)low_byte >> (16-MMA8451_PRECISION));
253 if (result < MMA8451_BOUNDARY)
254 result = result * MMA8451_GRAVITY_STEP;
255 else
256 result = ~(((~result & (0x7fff >> (16 - MMA8451_PRECISION))) + 1)
257 * MMA8451_GRAVITY_STEP) + 1;
258 break;
259
260 case MMA8452_DEVID:
261 swap(high_byte,low_byte);
262 result = ((int)high_byte << (MMA8452_PRECISION-8))
263 | ((int)low_byte >> (16-MMA8452_PRECISION));
264 if (result < MMA8452_BOUNDARY)
265 result = result * MMA8452_GRAVITY_STEP;
266 else
267 result = ~(((~result & (0x7fff >> (16 - MMA8452_PRECISION))) + 1)
268 * MMA8452_GRAVITY_STEP) + 1;
269 break;
270
271 case MMA8453_DEVID:
272 swap(high_byte,low_byte);
273 result = ((int)high_byte << (MMA8453_PRECISION-8))
274 | ((int)low_byte >> (16-MMA8453_PRECISION));
275 if (result < MMA8453_BOUNDARY)
276 result = result * MMA8453_GRAVITY_STEP;
277 else
278 result = ~(((~result & (0x7fff >> (16 - MMA8453_PRECISION))) + 1)
279 * MMA8453_GRAVITY_STEP) + 1;
280 break;
281
282 case MMA8653_DEVID:
283 swap(high_byte,low_byte);
284 result = ((int)high_byte << (MMA8653_PRECISION-8))
285 | ((int)low_byte >> (16-MMA8653_PRECISION));
286 if (result < MMA8653_BOUNDARY)
287 result = result * MMA8653_GRAVITY_STEP;
288 else
289 result = ~(((~result & (0x7fff >> (16 - MMA8653_PRECISION))) + 1)
290 * MMA8653_GRAVITY_STEP) + 1;
291 break;
292
293 default:
294 printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__);
295 return -EFAULT;
296 }
297
298 return (int)result;
299 }
300
gsensor_report_value(struct i2c_client * client,struct sensor_axis * axis)301 static int gsensor_report_value(struct i2c_client *client, struct sensor_axis *axis)
302 {
303 struct sensor_private_data *sensor =
304 (struct sensor_private_data *) i2c_get_clientdata(client);
305
306 if (sensor->status_cur == SENSOR_ON) {
307 /* Report acceleration sensor information */
308 input_report_abs(sensor->input_dev, ABS_X, axis->x);
309 input_report_abs(sensor->input_dev, ABS_Y, axis->y);
310 input_report_abs(sensor->input_dev, ABS_Z, axis->z);
311 input_sync(sensor->input_dev);
312 }
313
314 return 0;
315 }
316
317 #define GSENSOR_MIN 10
sensor_report_value(struct i2c_client * client)318 static int sensor_report_value(struct i2c_client *client)
319 {
320 struct sensor_private_data *sensor =
321 (struct sensor_private_data *) i2c_get_clientdata(client);
322 struct sensor_platform_data *pdata = sensor->pdata;
323 int ret = 0;
324 int x,y,z;
325 struct sensor_axis axis;
326 char buffer[6] = {0};
327 char value = 0;
328
329 if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
330 {
331 printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
332 return -1;
333 }
334
335 memset(buffer, 0, 6);
336
337 /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
338 do {
339 *buffer = sensor->ops->read_reg;
340 ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
341 if (ret < 0)
342 return ret;
343 } while (0);
344
345
346 //this gsensor need 6 bytes buffer
347 x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit
348 y = sensor_convert_data(sensor->client, buffer[3], buffer[2]);
349 z = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
350
351 axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
352 axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
353 axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
354
355 gsensor_report_value(client, &axis);
356
357 mutex_lock(&sensor->data_mutex);
358 sensor->axis = axis;
359 mutex_unlock(&sensor->data_mutex);
360
361 if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
362 {
363
364 value = sensor_read_reg(client, sensor->ops->int_status_reg);
365 DBG("%s:sensor int status :0x%x\n",__func__,value);
366 }
367
368 return ret;
369 }
370
371
372 static struct sensor_operate gsensor_mma8452_ops = {
373 .name = "mma8452",
374 .type = SENSOR_TYPE_ACCEL,
375 .id_i2c = ACCEL_ID_MMA845X,
376 .read_reg = MMA8452_REG_X_OUT_MSB,
377 .read_len = 6,
378 .id_reg = SENSOR_UNKNOW_DATA,
379 .id_data = SENSOR_UNKNOW_DATA,
380 .precision = MMA8452_PRECISION,
381 .ctrl_reg = MMA8452_REG_CTRL_REG1,
382 .int_status_reg = MMA8452_REG_INTSRC,
383 .range = {-MMA845X_RANGE, MMA845X_RANGE},
384 .trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT,
385 .active = sensor_active,
386 .init = sensor_init,
387 .report = sensor_report_value,
388 };
389
390 /****************operate according to sensor chip:end************/
gsensor_mma8452_probe(struct i2c_client * client,const struct i2c_device_id * devid)391 static int gsensor_mma8452_probe(struct i2c_client *client,
392 const struct i2c_device_id *devid)
393 {
394 return sensor_register_device(client, NULL, devid, &gsensor_mma8452_ops);
395 }
396
gsensor_mma8452_remove(struct i2c_client * client)397 static int gsensor_mma8452_remove(struct i2c_client *client)
398 {
399 return sensor_unregister_device(client, NULL, &gsensor_mma8452_ops);
400 }
401
402 static const struct i2c_device_id gsensor_mma8452_id[] = {
403 {"gs_mma8452", ACCEL_ID_MMA845X},
404 {}
405 };
406
407 static struct i2c_driver gsensor_mma8452_driver = {
408 .probe = gsensor_mma8452_probe,
409 .remove = gsensor_mma8452_remove,
410 .shutdown = sensor_shutdown,
411 .id_table = gsensor_mma8452_id,
412 .driver = {
413 .name = "gsensor_mma8452",
414 #ifdef CONFIG_PM
415 .pm = &sensor_pm_ops,
416 #endif
417 },
418 };
419
420 module_i2c_driver(gsensor_mma8452_driver);
421
422 MODULE_AUTHOR("luowei <lw@rock-chips.com>");
423 MODULE_DESCRIPTION("mma8452 3-Axis accelerometer driver");
424 MODULE_LICENSE("GPL");
425