// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <linux/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC" );
MODULE_AUTHOR("Martin Vaughan" );
MODULE_LICENSE("GPL" );
static bool 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, 0 x01, 0 x01 + (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, 0 x03, ctrl->val ? 0 xf0 : 0 x30);
return 0 ;
case V4L2_CID_AUDIO_VOLUME:
cs53l32a_write(sd, 0 x04, (u8)ctrl->val);
cs53l32a_write(sd, 0 x05, (u8)ctrl->val);
return 0 ;
}
return -EINVAL;
}
static int cs53l32a_log_status(struct v4l2_subdev *sd)
{
struct cs53l32a_state *state = to_state(sd);
u8 v = cs53l32a_read(sd, 0 x01);
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,
};
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 = i2c_client_get_device_id(client);
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)
strscpy(client->name, "cs53l32a" , sizeof (client->name));
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, &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);
return err;
}
/* Set cs53l32a internal register for Adaptec 2010/2410 setup */
cs53l32a_write(sd, 0 x01, 0 x21);
cs53l32a_write(sd, 0 x02, 0 x29);
cs53l32a_write(sd, 0 x03, 0 x30);
cs53l32a_write(sd, 0 x04, 0 x00);
cs53l32a_write(sd, 0 x05, 0 x00);
cs53l32a_write(sd, 0 x06, 0 x00);
cs53l32a_write(sd, 0 x07, 0 x00);
/* 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 void 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);
}
static const struct i2c_device_id cs53l32a_id[] = {
{ "cs53l32a" },
{ }
};
MODULE_DEVICE_TABLE(i2c, cs53l32a_id);
static struct i2c_driver cs53l32a_driver = {
.driver = {
.name = "cs53l32a" ,
},
.probe = cs53l32a_probe,
.remove = cs53l32a_remove,
.id_table = cs53l32a_id,
};
module_i2c_driver(cs53l32a_driver);
Messung V0.5 in Prozent C=96 H=96 G=95
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(vorverarbeitet am 2026-09-29)
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