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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/kmod.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <media/v4l2-device.h>
#include <asm/intel-mid.h>
#include "dw9714.h"
static struct dw9714_device dw9714_dev;
static int dw9714_i2c_write(struct i2c_client *client, u16 data)
{
struct i2c_msg msg;
const int num_msg = 1;
int ret;
u16 val;
val = cpu_to_be16(data);
msg.addr = DW9714_VCM_ADDR;
msg.flags = 0;
msg.len = DW9714_16BIT;
msg.buf = (u8 *)&val;
ret = i2c_transfer(client->adapter, &msg, 1);
return ret == num_msg ? 0 : -EIO;
}
int dw9714_vcm_power_up(struct v4l2_subdev *sd)
{
int ret;
/* Enable power */
ret = dw9714_dev.platform_data->power_ctrl(sd, 1);
/* waiting time requested by DW9714A(vcm) */
usleep_range(12000, 12500);
return ret;
}
int dw9714_vcm_power_down(struct v4l2_subdev *sd)
{
return dw9714_dev.platform_data->power_ctrl(sd, 0);
}
static int dw9714_t_focus_vcm(struct v4l2_subdev *sd, u16 val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = -EINVAL;
u8 mclk = vcm_step_mclk(dw9714_dev.vcm_settings.step_setting);
u8 s = vcm_step_s(dw9714_dev.vcm_settings.step_setting);
/*
* For different mode, VCM_PROTECTION_OFF/ON required by the
* control procedure. For DW9714_DIRECT/DLC mode, slew value is
* VCM_DEFAULT_S(0).
*/
switch (dw9714_dev.vcm_mode) {
case DW9714_DIRECT:
if (dw9714_dev.vcm_settings.update) {
ret = dw9714_i2c_write(client, VCM_PROTECTION_OFF);
if (ret)
return ret;
ret = dw9714_i2c_write(client, DIRECT_VCM);
if (ret)
return ret;
ret = dw9714_i2c_write(client, VCM_PROTECTION_ON);
if (ret)
return ret;
dw9714_dev.vcm_settings.update = false;
}
ret = dw9714_i2c_write(client,
vcm_val(val, VCM_DEFAULT_S));
break;
case DW9714_LSC:
if (dw9714_dev.vcm_settings.update) {
ret = dw9714_i2c_write(client, VCM_PROTECTION_OFF);
if (ret)
return ret;
ret = dw9714_i2c_write(client,
vcm_dlc_mclk(DLC_DISABLE, mclk));
if (ret)
return ret;
ret = dw9714_i2c_write(client,
vcm_tsrc(dw9714_dev.vcm_settings.t_src));
if (ret)
return ret;
ret = dw9714_i2c_write(client, VCM_PROTECTION_ON);
if (ret)
return ret;
dw9714_dev.vcm_settings.update = false;
}
ret = dw9714_i2c_write(client, vcm_val(val, s));
break;
case DW9714_DLC:
if (dw9714_dev.vcm_settings.update) {
ret = dw9714_i2c_write(client, VCM_PROTECTION_OFF);
if (ret)
return ret;
ret = dw9714_i2c_write(client,
vcm_dlc_mclk(DLC_ENABLE, mclk));
if (ret)
return ret;
ret = dw9714_i2c_write(client,
vcm_tsrc(dw9714_dev.vcm_settings.t_src));
if (ret)
return ret;
ret = dw9714_i2c_write(client, VCM_PROTECTION_ON);
if (ret)
return ret;
dw9714_dev.vcm_settings.update = false;
}
ret = dw9714_i2c_write(client,
vcm_val(val, VCM_DEFAULT_S));
break;
}
return ret;
}
int dw9714_t_focus_abs(struct v4l2_subdev *sd, s32 value)
{
int ret;
value = clamp(value, 0, DW9714_MAX_FOCUS_POS);
ret = dw9714_t_focus_vcm(sd, value);
if (ret == 0) {
dw9714_dev.number_of_steps = value - dw9714_dev.focus;
dw9714_dev.focus = value;
getnstimeofday(&(dw9714_dev.timestamp_t_focus_abs));
}
return ret;
}
int dw9714_t_focus_abs_init(struct v4l2_subdev *sd)
{
int ret;
ret = dw9714_t_focus_vcm(sd, DW9714_DEFAULT_FOCUS_POS);
if (ret == 0) {
dw9714_dev.number_of_steps =
DW9714_DEFAULT_FOCUS_POS - dw9714_dev.focus;
dw9714_dev.focus = DW9714_DEFAULT_FOCUS_POS;
getnstimeofday(&(dw9714_dev.timestamp_t_focus_abs));
}
return ret;
}
int dw9714_t_focus_rel(struct v4l2_subdev *sd, s32 value)
{
return dw9714_t_focus_abs(sd, dw9714_dev.focus + value);
}
int dw9714_q_focus_status(struct v4l2_subdev *sd, s32 *value)
{
u32 status = 0;
struct timespec temptime;
const struct timespec timedelay = {
0,
min_t(u32, abs(dw9714_dev.number_of_steps)*DELAY_PER_STEP_NS,
DELAY_MAX_PER_STEP_NS),
};
ktime_get_ts(&temptime);
temptime = timespec_sub(temptime, (dw9714_dev.timestamp_t_focus_abs));
if (timespec_compare(&temptime, &timedelay) <= 0) {
status |= ATOMISP_FOCUS_STATUS_MOVING;
status |= ATOMISP_FOCUS_HP_IN_PROGRESS;
} else {
status |= ATOMISP_FOCUS_STATUS_ACCEPTS_NEW_MOVE;
status |= ATOMISP_FOCUS_HP_COMPLETE;
}
*value = status;
return 0;
}
int dw9714_q_focus_abs(struct v4l2_subdev *sd, s32 *value)
{
s32 val;
dw9714_q_focus_status(sd, &val);
if (val & ATOMISP_FOCUS_STATUS_MOVING)
*value = dw9714_dev.focus - dw9714_dev.number_of_steps;
else
*value = dw9714_dev.focus;
return 0;
}
int dw9714_t_vcm_slew(struct v4l2_subdev *sd, s32 value)
{
dw9714_dev.vcm_settings.step_setting = value;
dw9714_dev.vcm_settings.update = true;
return 0;
}
int dw9714_t_vcm_timing(struct v4l2_subdev *sd, s32 value)
{
dw9714_dev.vcm_settings.t_src = value;
dw9714_dev.vcm_settings.update = true;
return 0;
}
|
