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 #ifdef CONFIG_HAS_EARLYSUSPEND
29 #include <linux/earlysuspend.h>
30 #endif
31 #include <linux/sensor-dev.h>
32
33
34 #define AP3212B_NUM_CACHABLE_REGS 23
35 #define AP3216C_NUM_CACHABLE_REGS 26
36
37 #define AP3212B_RAN_COMMAND 0x10
38 #define AP3212B_RAN_MASK 0x30
39 #define AP3212B_RAN_SHIFT (4)
40
41 #define AP3212B_MODE_COMMAND 0x00
42 #define AP3212B_MODE_SHIFT (0)
43 #define AP3212B_MODE_MASK 0x07
44
45 #define AP3212B_INT_COMMAND 0x01
46 #define AP3212B_INT_SHIFT (0)
47 #define AP3212B_INT_MASK 0x03
48 #define AP3212B_INT_PMASK 0x02
49 #define AP3212B_INT_AMASK 0x01
50
51 #define AP3212B_OBJ_COMMAND 0x0f
52 #define AP3212B_OBJ_MASK 0x80
53 #define AP3212B_OBJ_SHIFT (7)
54
55
56 /*
57 * register access helpers
58 */
59
__ap321xx_read_reg(struct i2c_client * client,u32 reg,u8 mask,u8 shift)60 static int __ap321xx_read_reg(struct i2c_client *client,
61 u32 reg, u8 mask, u8 shift)
62 {
63 u8 val;
64
65 val = i2c_smbus_read_byte_data(client, reg);
66 return (val & mask) >> shift;
67 }
68
__ap321xx_write_reg(struct i2c_client * client,u32 reg,u8 mask,u8 shift,u8 val)69 static int __ap321xx_write_reg(struct i2c_client *client,
70 u32 reg, u8 mask, u8 shift, u8 val)
71 {
72 int ret = 0;
73 u8 tmp;
74
75 tmp = i2c_smbus_read_byte_data(client, reg);
76 tmp &= ~mask;
77 tmp |= val << shift;
78
79 ret = i2c_smbus_write_byte_data(client, reg, tmp);
80
81 return ret;
82 }
83
84
85 /*
86 * internally used functions
87 */
88 /* range */
ap321xx_set_range(struct i2c_client * client,int range)89 static int ap321xx_set_range(struct i2c_client *client, int range)
90 {
91 return __ap321xx_write_reg(client, AP3212B_RAN_COMMAND,
92 AP3212B_RAN_MASK, AP3212B_RAN_SHIFT, range);;
93 }
94
95
96 /* mode */
ap321xx_get_mode(struct i2c_client * client)97 static int ap321xx_get_mode(struct i2c_client *client)
98 {
99 struct sensor_private_data *sensor =
100 (struct sensor_private_data *) i2c_get_clientdata(client);
101 int ret;
102
103 ret = __ap321xx_read_reg(client, sensor->ops->ctrl_reg,
104 AP3212B_MODE_MASK, AP3212B_MODE_SHIFT);
105 return ret;
106 }
ap321xx_set_mode(struct i2c_client * client,int mode)107 static int ap321xx_set_mode(struct i2c_client *client, int mode)
108 {
109 struct sensor_private_data *sensor =
110 (struct sensor_private_data *) i2c_get_clientdata(client);
111 int ret;
112
113 ret = __ap321xx_write_reg(client, sensor->ops->ctrl_reg,
114 AP3212B_MODE_MASK, AP3212B_MODE_SHIFT, mode);
115 return ret;
116 }
ap321xx_get_intstat(struct i2c_client * client)117 static int ap321xx_get_intstat(struct i2c_client *client)
118 {
119 struct sensor_private_data *sensor =
120 (struct sensor_private_data *) i2c_get_clientdata(client);
121 int val;
122
123 val = i2c_smbus_read_byte_data(client, sensor->ops->int_status_reg);
124 val &= AP3212B_INT_MASK;
125
126 return val >> AP3212B_INT_SHIFT;
127 }
128
ap321xx_get_object(struct i2c_client * client)129 static int ap321xx_get_object(struct i2c_client *client)
130 {
131 int val;
132
133 val = i2c_smbus_read_byte_data(client, AP3212B_OBJ_COMMAND);
134 val &= AP3212B_OBJ_MASK;
135
136 return val >> AP3212B_OBJ_SHIFT;
137 }
138
139
ap321xx_product_detect(struct i2c_client * client)140 static int ap321xx_product_detect(struct i2c_client *client)
141 {
142 int mid = i2c_smbus_read_byte_data(client, 0x03);
143 int pid = i2c_smbus_read_byte_data(client, 0x04);
144 int rid = i2c_smbus_read_byte_data(client, 0x05);
145
146 if ( mid == 0x01 && pid == 0x01 &&
147 (rid == 0x03 || rid == 0x04) )
148 {
149 //printk("RevID [%d], ==> DA3212 v1.5~1.8 ...... AP3212B detected\n", rid);
150 }
151 else if ( (mid == 0x01 && pid == 0x02 && rid == 0x00) ||
152 (mid == 0x02 && pid == 0x02 && rid == 0x01))
153 {
154 //printk("RevID [%d], ==> DA3212 v2.0 ...... AP3212C/AP3216C detected\n", rid);
155 }
156 else
157 {
158 printk("MakeID[%d] ProductID[%d] RevID[%d] .... can't detect ... bad reversion!!!\n", mid, pid, rid);
159 return -EIO;
160 }
161
162 return 0;
163 }
164
ap321xx_init_client(struct i2c_client * client)165 static int ap321xx_init_client(struct i2c_client *client)
166 {
167 /* set defaults */
168 ap321xx_set_range(client, 0);
169 ap321xx_set_mode(client, 0);
170
171 return 0;
172 }
173
ap321xx_psensor_enable(struct i2c_client * client)174 static int ap321xx_psensor_enable(struct i2c_client *client)
175 {
176 int ret = 0,mode;
177
178 mode = ap321xx_get_mode(client);
179 if((mode & 0x02) == 0){
180 mode |= 0x02;
181 ret = ap321xx_set_mode(client,mode);
182 }
183
184 return ret;
185 }
186
ap321xx_psensor_disable(struct i2c_client * client)187 static int ap321xx_psensor_disable(struct i2c_client *client)
188 {
189 int ret = 0,mode;
190
191 mode = ap321xx_get_mode(client);
192 if(mode & 0x02){
193 mode &= ~0x02;
194 if(mode == 0x04)
195 mode = 0x00;
196 ret = ap321xx_set_mode(client,mode);
197 }
198 return ret;
199 }
200
201 /****************operate according to sensor chip:start************/
202
sensor_active(struct i2c_client * client,int enable,int rate)203 static int sensor_active(struct i2c_client *client, int enable, int rate)
204 {
205 int result = 0;
206
207 //register setting according to chip datasheet
208 if (enable){
209 result = ap321xx_psensor_enable(client);
210 }
211 else
212 result = ap321xx_psensor_disable(client);
213
214 if(result)
215 printk("%s:fail to active sensor\n",__func__);
216
217 return result;
218
219 }
220
221
sensor_init(struct i2c_client * client)222 static int sensor_init(struct i2c_client *client)
223 {
224 struct sensor_private_data *sensor =
225 (struct sensor_private_data *) i2c_get_clientdata(client);
226 int result = 0;
227
228 result = ap321xx_product_detect(client);
229 if (result)
230 {
231 dev_err(&client->dev, "ret: %d, product version detect failed.\n",result);
232 return result;
233 }
234
235 /* initialize the AP3212B chip */
236 result = ap321xx_init_client(client);
237 if (result)
238 return result;
239
240 result = sensor->ops->active(client,0,0);
241 if(result)
242 {
243 printk("%s:line=%d,error\n",__func__,__LINE__);
244 return result;
245 }
246
247 sensor->status_cur = SENSOR_OFF;
248
249 return result;
250 }
251
sensor_report_value(struct i2c_client * client)252 static int sensor_report_value(struct i2c_client *client)
253 {
254 struct sensor_private_data *sensor =
255 (struct sensor_private_data *) i2c_get_clientdata(client);
256 int result = 0;
257 char value = 0;
258 u8 int_stat;
259
260 int_stat = ap321xx_get_intstat(client);
261 // ALS int
262 if (int_stat & AP3212B_INT_PMASK)
263 {
264 value = ap321xx_get_object(client);
265 input_report_abs(sensor->input_dev, ABS_DISTANCE, value);
266 input_sync(sensor->input_dev);
267 }
268
269 return result;
270 }
271
272 static struct sensor_operate proximity_ap321xx_ops = {
273 .name = "ps_ap321xx",
274 .type = SENSOR_TYPE_PROXIMITY, //sensor type and it should be correct
275 .id_i2c = PROXIMITY_ID_AP321XX, //i2c id number
276 .read_reg = SENSOR_UNKNOW_DATA, //read data //there are two regs, we fix them in code.
277 .read_len = 1, //data length
278 .id_reg = SENSOR_UNKNOW_DATA, //read device id from this register //there are 3 regs, we fix them in code.
279 .id_data = SENSOR_UNKNOW_DATA, //device id
280 .precision = 8, //8 bits
281 .ctrl_reg = AP3212B_MODE_COMMAND, //enable or disable
282 .int_status_reg = AP3212B_INT_COMMAND, //intterupt status register
283 .range = {0,10}, //range
284 .brightness ={10,255}, // brightness
285 .trig = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED,
286 .active = sensor_active,
287 .init = sensor_init,
288 .report = sensor_report_value,
289 };
290
291 /****************operate according to sensor chip:end************/
proximity_ap321xx_probe(struct i2c_client * client,const struct i2c_device_id * devid)292 static int proximity_ap321xx_probe(struct i2c_client *client,
293 const struct i2c_device_id *devid)
294 {
295 return sensor_register_device(client, NULL, devid, &proximity_ap321xx_ops);
296 }
297
proximity_ap321xx_remove(struct i2c_client * client)298 static int proximity_ap321xx_remove(struct i2c_client *client)
299 {
300 return sensor_unregister_device(client, NULL, &proximity_ap321xx_ops);
301 }
302
303 static const struct i2c_device_id proximity_ap321xx_id[] = {
304 {"ps_ap321xx", PROXIMITY_ID_AP321XX},
305 {}
306 };
307
308 static struct i2c_driver proximity_ap321xx_driver = {
309 .probe = proximity_ap321xx_probe,
310 .remove = proximity_ap321xx_remove,
311 .shutdown = sensor_shutdown,
312 .id_table = proximity_ap321xx_id,
313 .driver = {
314 .name = "proximity_ap321xx",
315 #ifdef CONFIG_PM
316 .pm = &sensor_pm_ops,
317 #endif
318 },
319 };
320
321 module_i2c_driver(proximity_ap321xx_driver);
322
323 MODULE_AUTHOR("luowei <lw@rock-chips.com>");
324 MODULE_DESCRIPTION("ps_ap321xx proximity driver");
325 MODULE_LICENSE("GPL");
326