1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
#include "barometer_factory.h"
static int baro_factory_open(struct inode *inode, struct file *file)
{
file->private_data = baro_context_obj;
if (file->private_data == NULL)
{
BARO_ERR("null pointer!!\n");
return -EINVAL;
}
return nonseekable_open(inode, file);
}
static int baro_factory_release(struct inode *inode, struct file *file)
{
file->private_data = NULL;
return 0;
}
static long baro_factory_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
//void __user *data;
long err = 0;
struct baro_context *cxt = baro_context_obj;
void __user *ptr = (void __user*) arg;
int dat;
//uint32_t enable = 0;
//int ps_cali;
//int threshold_data[2];
if (_IOC_DIR(cmd) & _IOC_READ)
{
err = !access_ok(VERIFY_WRITE, (void __user *)arg, _IOC_SIZE(cmd));
}
else if (_IOC_DIR(cmd) & _IOC_WRITE)
{
err = !access_ok(VERIFY_READ, (void __user *)arg, _IOC_SIZE(cmd));
}
if (err)
{
BARO_ERR("access error: %08X, (%2d, %2d)\n", cmd, _IOC_DIR(cmd), _IOC_SIZE(cmd));
return -EFAULT;
}
switch (cmd)
{
case BAROMETER_IOCTL_INIT:
BARO_LOG("BAROMETER_IOCTL_INIT enable\n");
if(cxt->baro_ctl.enable_nodata!= NULL){
err = cxt->baro_ctl.enable_nodata(1);
if(err < 0)
{
BARO_ERR("BAROMETER_IOCTL_INIT fail!\n");
break;
}
}
break;
case BAROMETER_GET_PRESS_DATA:
if(cxt->baro_data.get_raw_data!= NULL){
err = cxt->baro_data.get_raw_data(TYPE_PRESS, &dat);
if(err < 0)
{
BARO_ERR("BAROMETER_GET_PRESS_DATA fail!\n");
break;
}
}
if(copy_to_user(ptr, &dat, sizeof(dat)))
{
err = -EFAULT;
break;
}
break;
case BAROMETER_GET_TEMP_DATA:
if(cxt->baro_data.get_raw_data!= NULL){
err = cxt->baro_data.get_raw_data(TYPE_TEMP, &dat);
if(err < 0)
{
BARO_ERR("BAROMETER_GET_PRESS_DATA fail!\n");
break;
}
}
if(copy_to_user(ptr, &dat, sizeof(dat)))
{
err = -EFAULT;
break;
}
break;
default:
BARO_ERR("unknown IOCTL: 0x%08x\n", cmd);
err = -ENOIOCTLCMD;
break;
}
return err;
}
static struct file_operations baro_factory_fops = {
.open = baro_factory_open,
.release = baro_factory_release,
.unlocked_ioctl = baro_factory_unlocked_ioctl,
};
static struct miscdevice baro_factory_device = {
.minor = MISC_DYNAMIC_MINOR,
.name = "barometer",
.fops = &baro_factory_fops,
};
int baro_factory_device_init()
{
int error = 0;
struct baro_context *cxt = baro_context_obj;
if (!cxt->baro_ctl.is_use_common_factory) {
BARO_LOG("Node of '/dev/barometer' has already existed!\n");
return -1;
}
if ((error = misc_register(&baro_factory_device)))
{
BARO_ERR("baro_factory_device register failed\n");
error = -1;
}
return error;
}
|
