2 * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
3 * Copyright (C) 2007 Hans Verkuil
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.
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.
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.
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>
30 MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
31 MODULE_AUTHOR("Hans Verkuil");
32 MODULE_LICENSE("GPL");
36 module_param(debug, bool, 0644);
38 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
41 struct v4l2_subdev sd;
42 struct v4l2_ctrl_handler hdl;
45 static inline struct cs5345_state *to_state(struct v4l2_subdev *sd)
47 return container_of(sd, struct cs5345_state, sd);
50 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
52 return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd;
55 /* ----------------------------------------------------------------------- */
57 static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
59 struct i2c_client *client = v4l2_get_subdevdata(sd);
61 return i2c_smbus_write_byte_data(client, reg, value);
64 static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
66 struct i2c_client *client = v4l2_get_subdevdata(sd);
68 return i2c_smbus_read_byte_data(client, reg);
71 static int cs5345_s_routing(struct v4l2_subdev *sd,
72 u32 input, u32 output, u32 config)
74 if ((input & 0xf) > 6) {
75 v4l2_err(sd, "Invalid input %d.\n", input);
78 cs5345_write(sd, 0x09, input & 0xf);
79 cs5345_write(sd, 0x05, input & 0xf0);
83 static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl)
85 struct v4l2_subdev *sd = to_sd(ctrl);
88 case V4L2_CID_AUDIO_MUTE:
89 cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 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);
99 #ifdef CONFIG_VIDEO_ADV_DEBUG
100 static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
102 struct i2c_client *client = v4l2_get_subdevdata(sd);
104 if (!v4l2_chip_match_i2c_client(client, ®->match))
106 if (!capable(CAP_SYS_ADMIN))
109 reg->val = cs5345_read(sd, reg->reg & 0x1f);
113 static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
115 struct i2c_client *client = v4l2_get_subdevdata(sd);
117 if (!v4l2_chip_match_i2c_client(client, ®->match))
119 if (!capable(CAP_SYS_ADMIN))
121 cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
126 static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
128 struct i2c_client *client = v4l2_get_subdevdata(sd);
130 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
133 static int cs5345_log_status(struct v4l2_subdev *sd)
135 u8 v = cs5345_read(sd, 0x09) & 7;
136 u8 m = cs5345_read(sd, 0x04);
137 int vol = cs5345_read(sd, 0x08) & 0x3f;
139 v4l2_info(sd, "Input: %d%s\n", v,
140 (m & 0x80) ? " (muted)" : "");
143 v4l2_info(sd, "Volume: %d dB\n", vol);
147 /* ----------------------------------------------------------------------- */
149 static const struct v4l2_ctrl_ops cs5345_ctrl_ops = {
150 .s_ctrl = cs5345_s_ctrl,
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,
169 static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
170 .s_routing = cs5345_s_routing,
173 static const struct v4l2_subdev_ops cs5345_ops = {
174 .core = &cs5345_core_ops,
175 .audio = &cs5345_audio_ops,
178 /* ----------------------------------------------------------------------- */
180 static int cs5345_probe(struct i2c_client *client,
181 const struct i2c_device_id *id)
183 struct cs5345_state *state;
184 struct v4l2_subdev *sd;
186 /* Check if the adapter supports the needed features */
187 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
190 v4l_info(client, "chip found @ 0x%x (%s)\n",
191 client->addr << 1, client->adapter->name);
193 state = kzalloc(sizeof(struct cs5345_state), GFP_KERNEL);
197 v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
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;
208 v4l2_ctrl_handler_free(&state->hdl);
212 /* set volume/mute */
213 v4l2_ctrl_handler_setup(&state->hdl);
215 cs5345_write(sd, 0x02, 0x00);
216 cs5345_write(sd, 0x04, 0x01);
217 cs5345_write(sd, 0x09, 0x01);
221 /* ----------------------------------------------------------------------- */
223 static int cs5345_remove(struct i2c_client *client)
225 struct v4l2_subdev *sd = i2c_get_clientdata(client);
226 struct cs5345_state *state = to_state(sd);
228 v4l2_device_unregister_subdev(sd);
229 v4l2_ctrl_handler_free(&state->hdl);
234 /* ----------------------------------------------------------------------- */
236 static const struct i2c_device_id cs5345_id[] = {
240 MODULE_DEVICE_TABLE(i2c, cs5345_id);
242 static struct i2c_driver cs5345_driver = {
244 .owner = THIS_MODULE,
247 .probe = cs5345_probe,
248 .remove = cs5345_remove,
249 .id_table = cs5345_id,
252 static __init int init_cs5345(void)
254 return i2c_add_driver(&cs5345_driver);
257 static __exit void exit_cs5345(void)
259 i2c_del_driver(&cs5345_driver);
262 module_init(init_cs5345);
263 module_exit(exit_cs5345);