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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
/*
* cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
* Copyright (C) 2005 Martin Vaughan
*
* Audio source switching for Adaptec AVC-2410 added by Trev Jackson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ctrls.h>
MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
MODULE_AUTHOR("Martin Vaughan");
MODULE_LICENSE("GPL");
static int debug;
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
struct cs53l32a_state {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
};
static inline struct cs53l32a_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct cs53l32a_state, sd);
}
static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler, struct cs53l32a_state, hdl)->sd;
}
/* ----------------------------------------------------------------------- */
static int cs53l32a_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_write_byte_data(client, reg, value);
}
static int cs53l32a_read(struct v4l2_subdev *sd, u8 reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_read_byte_data(client, reg);
}
static int cs53l32a_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
/* There are 2 physical inputs, but the second input can be
placed in two modes, the first mode bypasses the PGA (gain),
the second goes through the PGA. Hence there are three
possible inputs to choose from. */
if (input > 2) {
v4l2_err(sd, "Invalid input %d.\n", input);
return -EINVAL;
}
cs53l32a_write(sd, 0x01, 0x01 + (input << 4));
return 0;
}
static int cs53l32a_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd = to_sd(ctrl);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
cs53l32a_write(sd, 0x03, ctrl->val ? 0xf0 : 0x30);
return 0;
case V4L2_CID_AUDIO_VOLUME:
cs53l32a_write(sd, 0x04, (u8)ctrl->val);
cs53l32a_write(sd, 0x05, (u8)ctrl->val);
return 0;
}
return -EINVAL;
}
static int cs53l32a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return v4l2_chip_ident_i2c_client(client,
chip, V4L2_IDENT_CS53l32A, 0);
}
static int cs53l32a_log_status(struct v4l2_subdev *sd)
{
struct cs53l32a_state *state = to_state(sd);
u8 v = cs53l32a_read(sd, 0x01);
v4l2_info(sd, "Input: %d\n", (v >> 4) & 3);
v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
return 0;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_ctrl_ops cs53l32a_ctrl_ops = {
.s_ctrl = cs53l32a_s_ctrl,
};
static const struct v4l2_subdev_core_ops cs53l32a_core_ops = {
.log_status = cs53l32a_log_status,
.g_chip_ident = cs53l32a_g_chip_ident,
.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
.g_ctrl = v4l2_subdev_g_ctrl,
.s_ctrl = v4l2_subdev_s_ctrl,
.queryctrl = v4l2_subdev_queryctrl,
.querymenu = v4l2_subdev_querymenu,
};
static const struct v4l2_subdev_audio_ops cs53l32a_audio_ops = {
.s_routing = cs53l32a_s_routing,
};
static const struct v4l2_subdev_ops cs53l32a_ops = {
.core = &cs53l32a_core_ops,
.audio = &cs53l32a_audio_ops,
};
/* ----------------------------------------------------------------------- */
/* i2c implementation */
/*
* Generic i2c probe
* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
*/
static int cs53l32a_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct cs53l32a_state *state;
struct v4l2_subdev *sd;
int i;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
if (!id)
strlcpy(client->name, "cs53l32a", sizeof(client->name));
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
state = kzalloc(sizeof(struct cs53l32a_state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &cs53l32a_ops);
for (i = 1; i <= 7; i++) {
u8 v = cs53l32a_read(sd, i);
v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
}
v4l2_ctrl_handler_init(&state->hdl, 2);
v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops,
V4L2_CID_AUDIO_VOLUME, -96, 12, 1, 0);
v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops,
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
sd->ctrl_handler = &state->hdl;
if (state->hdl.error) {
int err = state->hdl.error;
v4l2_ctrl_handler_free(&state->hdl);
kfree(state);
return err;
}
/* Set cs53l32a internal register for Adaptec 2010/2410 setup */
cs53l32a_write(sd, 0x01, 0x21);
cs53l32a_write(sd, 0x02, 0x29);
cs53l32a_write(sd, 0x03, 0x30);
cs53l32a_write(sd, 0x04, 0x00);
cs53l32a_write(sd, 0x05, 0x00);
cs53l32a_write(sd, 0x06, 0x00);
cs53l32a_write(sd, 0x07, 0x00);
/* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
for (i = 1; i <= 7; i++) {
u8 v = cs53l32a_read(sd, i);
v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
}
return 0;
}
static int cs53l32a_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct cs53l32a_state *state = to_state(sd);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&state->hdl);
kfree(state);
return 0;
}
static const struct i2c_device_id cs53l32a_id[] = {
{ "cs53l32a", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, cs53l32a_id);
static struct i2c_driver cs53l32a_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "cs53l32a",
},
.probe = cs53l32a_probe,
.remove = cs53l32a_remove,
.id_table = cs53l32a_id,
};
static __init int init_cs53l32a(void)
{
return i2c_add_driver(&cs53l32a_driver);
}
static __exit void exit_cs53l32a(void)
{
i2c_del_driver(&cs53l32a_driver);
}
module_init(init_cs53l32a);
module_exit(exit_cs53l32a);
|
