media: tegra: Tegra V4L2 camera
[linux-2.6.git] / 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 <linux/slab.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-chip-ident.h>
28 #include <media/v4l2-ctrls.h>
29
30 MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
31 MODULE_AUTHOR("Hans Verkuil");
32 MODULE_LICENSE("GPL");
33
34 static int debug;
35
36 module_param(debug, bool, 0644);
37
38 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
39
40 struct cs5345_state {
41         struct v4l2_subdev sd;
42         struct v4l2_ctrl_handler hdl;
43 };
44
45 static inline struct cs5345_state *to_state(struct v4l2_subdev *sd)
46 {
47         return container_of(sd, struct cs5345_state, sd);
48 }
49
50 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
51 {
52         return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd;
53 }
54
55 /* ----------------------------------------------------------------------- */
56
57 static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
58 {
59         struct i2c_client *client = v4l2_get_subdevdata(sd);
60
61         return i2c_smbus_write_byte_data(client, reg, value);
62 }
63
64 static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
65 {
66         struct i2c_client *client = v4l2_get_subdevdata(sd);
67
68         return i2c_smbus_read_byte_data(client, reg);
69 }
70
71 static int cs5345_s_routing(struct v4l2_subdev *sd,
72                             u32 input, u32 output, u32 config)
73 {
74         if ((input & 0xf) > 6) {
75                 v4l2_err(sd, "Invalid input %d.\n", input);
76                 return -EINVAL;
77         }
78         cs5345_write(sd, 0x09, input & 0xf);
79         cs5345_write(sd, 0x05, input & 0xf0);
80         return 0;
81 }
82
83 static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl)
84 {
85         struct v4l2_subdev *sd = to_sd(ctrl);
86
87         switch (ctrl->id) {
88         case V4L2_CID_AUDIO_MUTE:
89                 cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0);
90                 return 0;
91         case V4L2_CID_AUDIO_VOLUME:
92                 cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f);
93                 cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f);
94                 return 0;
95         }
96         return -EINVAL;
97 }
98
99 #ifdef CONFIG_VIDEO_ADV_DEBUG
100 static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
101 {
102         struct i2c_client *client = v4l2_get_subdevdata(sd);
103
104         if (!v4l2_chip_match_i2c_client(client, &reg->match))
105                 return -EINVAL;
106         if (!capable(CAP_SYS_ADMIN))
107                 return -EPERM;
108         reg->size = 1;
109         reg->val = cs5345_read(sd, reg->reg & 0x1f);
110         return 0;
111 }
112
113 static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
114 {
115         struct i2c_client *client = v4l2_get_subdevdata(sd);
116
117         if (!v4l2_chip_match_i2c_client(client, &reg->match))
118                 return -EINVAL;
119         if (!capable(CAP_SYS_ADMIN))
120                 return -EPERM;
121         cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
122         return 0;
123 }
124 #endif
125
126 static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
127 {
128         struct i2c_client *client = v4l2_get_subdevdata(sd);
129
130         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
131 }
132
133 static int cs5345_log_status(struct v4l2_subdev *sd)
134 {
135         u8 v = cs5345_read(sd, 0x09) & 7;
136         u8 m = cs5345_read(sd, 0x04);
137         int vol = cs5345_read(sd, 0x08) & 0x3f;
138
139         v4l2_info(sd, "Input:  %d%s\n", v,
140                         (m & 0x80) ? " (muted)" : "");
141         if (vol >= 32)
142                 vol = vol - 64;
143         v4l2_info(sd, "Volume: %d dB\n", vol);
144         return 0;
145 }
146
147 /* ----------------------------------------------------------------------- */
148
149 static const struct v4l2_ctrl_ops cs5345_ctrl_ops = {
150         .s_ctrl = cs5345_s_ctrl,
151 };
152
153 static const struct v4l2_subdev_core_ops cs5345_core_ops = {
154         .log_status = cs5345_log_status,
155         .g_chip_ident = cs5345_g_chip_ident,
156         .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
157         .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
158         .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
159         .g_ctrl = v4l2_subdev_g_ctrl,
160         .s_ctrl = v4l2_subdev_s_ctrl,
161         .queryctrl = v4l2_subdev_queryctrl,
162         .querymenu = v4l2_subdev_querymenu,
163 #ifdef CONFIG_VIDEO_ADV_DEBUG
164         .g_register = cs5345_g_register,
165         .s_register = cs5345_s_register,
166 #endif
167 };
168
169 static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
170         .s_routing = cs5345_s_routing,
171 };
172
173 static const struct v4l2_subdev_ops cs5345_ops = {
174         .core = &cs5345_core_ops,
175         .audio = &cs5345_audio_ops,
176 };
177
178 /* ----------------------------------------------------------------------- */
179
180 static int cs5345_probe(struct i2c_client *client,
181                         const struct i2c_device_id *id)
182 {
183         struct cs5345_state *state;
184         struct v4l2_subdev *sd;
185
186         /* Check if the adapter supports the needed features */
187         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
188                 return -EIO;
189
190         v4l_info(client, "chip found @ 0x%x (%s)\n",
191                         client->addr << 1, client->adapter->name);
192
193         state = kzalloc(sizeof(struct cs5345_state), GFP_KERNEL);
194         if (state == NULL)
195                 return -ENOMEM;
196         sd = &state->sd;
197         v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
198
199         v4l2_ctrl_handler_init(&state->hdl, 2);
200         v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
201                         V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
202         v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
203                         V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0);
204         sd->ctrl_handler = &state->hdl;
205         if (state->hdl.error) {
206                 int err = state->hdl.error;
207
208                 v4l2_ctrl_handler_free(&state->hdl);
209                 kfree(state);
210                 return err;
211         }
212         /* set volume/mute */
213         v4l2_ctrl_handler_setup(&state->hdl);
214
215         cs5345_write(sd, 0x02, 0x00);
216         cs5345_write(sd, 0x04, 0x01);
217         cs5345_write(sd, 0x09, 0x01);
218         return 0;
219 }
220
221 /* ----------------------------------------------------------------------- */
222
223 static int cs5345_remove(struct i2c_client *client)
224 {
225         struct v4l2_subdev *sd = i2c_get_clientdata(client);
226         struct cs5345_state *state = to_state(sd);
227
228         v4l2_device_unregister_subdev(sd);
229         v4l2_ctrl_handler_free(&state->hdl);
230         kfree(state);
231         return 0;
232 }
233
234 /* ----------------------------------------------------------------------- */
235
236 static const struct i2c_device_id cs5345_id[] = {
237         { "cs5345", 0 },
238         { }
239 };
240 MODULE_DEVICE_TABLE(i2c, cs5345_id);
241
242 static struct i2c_driver cs5345_driver = {
243         .driver = {
244                 .owner  = THIS_MODULE,
245                 .name   = "cs5345",
246         },
247         .probe          = cs5345_probe,
248         .remove         = cs5345_remove,
249         .id_table       = cs5345_id,
250 };
251
252 static __init int init_cs5345(void)
253 {
254         return i2c_add_driver(&cs5345_driver);
255 }
256
257 static __exit void exit_cs5345(void)
258 {
259         i2c_del_driver(&cs5345_driver);
260 }
261
262 module_init(init_cs5345);
263 module_exit(exit_cs5345);