V4L/DVB (11970): gspca - ov519: Add support for the ov518 bridge.
[linux-2.6] / drivers / media / video / cs5345.c
1 /*
2  * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
3  * Copyright (C) 2007 Hans Verkuil
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
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  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18  */
19
20
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/i2c.h>
24 #include <linux/videodev2.h>
25 #include <media/v4l2-device.h>
26 #include <media/v4l2-chip-ident.h>
27 #include <media/v4l2-i2c-drv.h>
28
29 MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
30 MODULE_AUTHOR("Hans Verkuil");
31 MODULE_LICENSE("GPL");
32
33 static int debug;
34
35 module_param(debug, bool, 0644);
36
37 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
38
39
40 /* ----------------------------------------------------------------------- */
41
42 static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
43 {
44         struct i2c_client *client = v4l2_get_subdevdata(sd);
45
46         return i2c_smbus_write_byte_data(client, reg, value);
47 }
48
49 static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
50 {
51         struct i2c_client *client = v4l2_get_subdevdata(sd);
52
53         return i2c_smbus_read_byte_data(client, reg);
54 }
55
56 static int cs5345_s_routing(struct v4l2_subdev *sd,
57                             u32 input, u32 output, u32 config)
58 {
59         if ((input & 0xf) > 6) {
60                 v4l2_err(sd, "Invalid input %d.\n", input);
61                 return -EINVAL;
62         }
63         cs5345_write(sd, 0x09, input & 0xf);
64         cs5345_write(sd, 0x05, input & 0xf0);
65         return 0;
66 }
67
68 static int cs5345_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
69 {
70         if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
71                 ctrl->value = (cs5345_read(sd, 0x04) & 0x08) != 0;
72                 return 0;
73         }
74         if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
75                 return -EINVAL;
76         ctrl->value = cs5345_read(sd, 0x07) & 0x3f;
77         if (ctrl->value >= 32)
78                 ctrl->value = ctrl->value - 64;
79         return 0;
80 }
81
82 static int cs5345_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
83 {
84         if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
85                 cs5345_write(sd, 0x04, ctrl->value ? 0x80 : 0);
86                 return 0;
87         }
88         if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
89                 return -EINVAL;
90         if (ctrl->value > 24 || ctrl->value < -24)
91                 return -EINVAL;
92         cs5345_write(sd, 0x07, ((u8)ctrl->value) & 0x3f);
93         cs5345_write(sd, 0x08, ((u8)ctrl->value) & 0x3f);
94         return 0;
95 }
96
97 #ifdef CONFIG_VIDEO_ADV_DEBUG
98 static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
99 {
100         struct i2c_client *client = v4l2_get_subdevdata(sd);
101
102         if (!v4l2_chip_match_i2c_client(client, &reg->match))
103                 return -EINVAL;
104         if (!capable(CAP_SYS_ADMIN))
105                 return -EPERM;
106         reg->size = 1;
107         reg->val = cs5345_read(sd, reg->reg & 0x1f);
108         return 0;
109 }
110
111 static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
112 {
113         struct i2c_client *client = v4l2_get_subdevdata(sd);
114
115         if (!v4l2_chip_match_i2c_client(client, &reg->match))
116                 return -EINVAL;
117         if (!capable(CAP_SYS_ADMIN))
118                 return -EPERM;
119         cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
120         return 0;
121 }
122 #endif
123
124 static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
125 {
126         struct i2c_client *client = v4l2_get_subdevdata(sd);
127
128         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
129 }
130
131 static int cs5345_log_status(struct v4l2_subdev *sd)
132 {
133         u8 v = cs5345_read(sd, 0x09) & 7;
134         u8 m = cs5345_read(sd, 0x04);
135         int vol = cs5345_read(sd, 0x08) & 0x3f;
136
137         v4l2_info(sd, "Input:  %d%s\n", v,
138                         (m & 0x80) ? " (muted)" : "");
139         if (vol >= 32)
140                 vol = vol - 64;
141         v4l2_info(sd, "Volume: %d dB\n", vol);
142         return 0;
143 }
144
145 /* ----------------------------------------------------------------------- */
146
147 static const struct v4l2_subdev_core_ops cs5345_core_ops = {
148         .log_status = cs5345_log_status,
149         .g_chip_ident = cs5345_g_chip_ident,
150         .g_ctrl = cs5345_g_ctrl,
151         .s_ctrl = cs5345_s_ctrl,
152 #ifdef CONFIG_VIDEO_ADV_DEBUG
153         .g_register = cs5345_g_register,
154         .s_register = cs5345_s_register,
155 #endif
156 };
157
158 static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
159         .s_routing = cs5345_s_routing,
160 };
161
162 static const struct v4l2_subdev_ops cs5345_ops = {
163         .core = &cs5345_core_ops,
164         .audio = &cs5345_audio_ops,
165 };
166
167 /* ----------------------------------------------------------------------- */
168
169 static int cs5345_probe(struct i2c_client *client,
170                         const struct i2c_device_id *id)
171 {
172         struct v4l2_subdev *sd;
173
174         /* Check if the adapter supports the needed features */
175         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
176                 return -EIO;
177
178         v4l_info(client, "chip found @ 0x%x (%s)\n",
179                         client->addr << 1, client->adapter->name);
180
181         sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
182         if (sd == NULL)
183                 return -ENOMEM;
184         v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
185
186         cs5345_write(sd, 0x02, 0x00);
187         cs5345_write(sd, 0x04, 0x01);
188         cs5345_write(sd, 0x09, 0x01);
189         return 0;
190 }
191
192 /* ----------------------------------------------------------------------- */
193
194 static int cs5345_remove(struct i2c_client *client)
195 {
196         struct v4l2_subdev *sd = i2c_get_clientdata(client);
197
198         v4l2_device_unregister_subdev(sd);
199         kfree(sd);
200         return 0;
201 }
202
203 /* ----------------------------------------------------------------------- */
204
205 static const struct i2c_device_id cs5345_id[] = {
206         { "cs5345", 0 },
207         { }
208 };
209 MODULE_DEVICE_TABLE(i2c, cs5345_id);
210
211 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
212         .name = "cs5345",
213         .probe = cs5345_probe,
214         .remove = cs5345_remove,
215         .id_table = cs5345_id,
216 };