Release 4.7 drivers/media/i2c/cs5345.c
/*
* cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
* Copyright (C) 2007 Hans Verkuil
*
* 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/kernel.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
MODULE_AUTHOR("Hans Verkuil");
MODULE_LICENSE("GPL");
static bool debug;
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
struct cs5345_state {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
};
static inline struct cs5345_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct cs5345_state, sd);
}
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static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd;
}
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/* ----------------------------------------------------------------------- */
static inline int cs5345_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);
}
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static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_read_byte_data(client, reg);
}
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static int cs5345_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
if ((input & 0xf) > 6) {
v4l2_err(sd, "Invalid input %d.\n", input);
return -EINVAL;
}
cs5345_write(sd, 0x09, input & 0xf);
cs5345_write(sd, 0x05, input & 0xf0);
return 0;
}
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static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd = to_sd(ctrl);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0);
return 0;
case V4L2_CID_AUDIO_VOLUME:
cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f);
cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f);
return 0;
}
return -EINVAL;
}
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#ifdef CONFIG_VIDEO_ADV_DEBUG
static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
reg->size = 1;
reg->val = cs5345_read(sd, reg->reg & 0x1f);
return 0;
}
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static int cs5345_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
{
cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
return 0;
}
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#endif
static int cs5345_log_status(struct v4l2_subdev *sd)
{
u8 v = cs5345_read(sd, 0x09) & 7;
u8 m = cs5345_read(sd, 0x04);
int vol = cs5345_read(sd, 0x08) & 0x3f;
v4l2_info(sd, "Input: %d%s\n", v,
(m & 0x80) ? " (muted)" : "");
if (vol >= 32)
vol = vol - 64;
v4l2_info(sd, "Volume: %d dB\n", vol);
return 0;
}
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/* ----------------------------------------------------------------------- */
static const struct v4l2_ctrl_ops cs5345_ctrl_ops = {
.s_ctrl = cs5345_s_ctrl,
};
static const struct v4l2_subdev_core_ops cs5345_core_ops = {
.log_status = cs5345_log_status,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = cs5345_g_register,
.s_register = cs5345_s_register,
#endif
};
static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
.s_routing = cs5345_s_routing,
};
static const struct v4l2_subdev_ops cs5345_ops = {
.core = &cs5345_core_ops,
.audio = &cs5345_audio_ops,
};
/* ----------------------------------------------------------------------- */
static int cs5345_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct cs5345_state *state;
struct v4l2_subdev *sd;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
v4l2_ctrl_handler_init(&state->hdl, 2);
v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0);
sd->ctrl_handler = &state->hdl;
if (state->hdl.error) {
int err = state->hdl.error;
v4l2_ctrl_handler_free(&state->hdl);
return err;
}
/* set volume/mute */
v4l2_ctrl_handler_setup(&state->hdl);
cs5345_write(sd, 0x02, 0x00);
cs5345_write(sd, 0x04, 0x01);
cs5345_write(sd, 0x09, 0x01);
return 0;
}
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/* ----------------------------------------------------------------------- */
static int cs5345_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct cs5345_state *state = to_state(sd);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&state->hdl);
return 0;
}
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/* ----------------------------------------------------------------------- */
static const struct i2c_device_id cs5345_id[] = {
{ "cs5345", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, cs5345_id);
static struct i2c_driver cs5345_driver = {
.driver = {
.name = "cs5345",
},
.probe = cs5345_probe,
.remove = cs5345_remove,
.id_table = cs5345_id,
};
module_i2c_driver(cs5345_driver);
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