/*
* 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-chip-ident.h>
MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
MODULE_AUTHOR("Hans Verkuil");
MODULE_LICENSE("GPL");
static int debug;
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
/* ----------------------------------------------------------------------- */
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);
}
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);
}
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;
}
static int cs5345_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
ctrl->value = (cs5345_read(sd, 0x04) & 0x08) != 0;
return 0;
}
if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
return -EINVAL;
ctrl->value = cs5345_read(sd, 0x07) & 0x3f;
if (ctrl->value >= 32)
ctrl->value = ctrl->value - 64;
return 0;
}
static int cs5345_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
cs5345_write(sd, 0x04, ctrl->value ? 0x80 : 0);
return 0;
}
if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
return -EINVAL;
if (ctrl->value > 24 || ctrl->value < -24)
return -EINVAL;
cs5345_write(sd, 0x07, ((u8)ctrl->value) & 0x3f);
cs5345_write(sd, 0x08, ((u8)ctrl->value) & 0x3f);
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (!v4l2_chip_match_i2c_client(client, ®->match))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
reg->size = 1;
reg->val = cs5345_read(sd, reg->reg & 0x1f);
return 0;
}
static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (!v4l2_chip_match_i2c_client(client, ®->match))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
return 0;
}
#endif
static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
}
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;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops cs5345_core_ops = {
.log_status = cs5345_log_status,
.g_chip_ident = cs5345_g_chip_ident,
.g_ctrl = cs5345_g_ctrl,
.s_ctrl = cs5345_s_ctrl,
#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 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);
sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
if (sd == NULL)
return -ENOMEM;
v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
cs5345_write(sd, 0x02, 0x00);
cs5345_write(sd, 0x04, 0x01);
cs5345_write(sd, 0x09, 0x01);
return 0;
}
/* ----------------------------------------------------------------------- */
static int cs5345_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
kfree(sd);
return 0;
}
/* ----------------------------------------------------------------------- */
static const struct i2c_device_id cs5345_id[] = {
{ "cs5345", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, cs5345_id);
static struct i2c_driver cs5345_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "cs5345",
},
.probe = cs5345_probe,
.remove = cs5345_remove,
.id_table = cs5345_id,
};
static __init int init_cs5345(void)
{
return i2c_add_driver(&cs5345_driver);
}
static __exit void exit_cs5345(void)
{
i2c_del_driver(&cs5345_driver);
}
module_init(init_cs5345);
module_exit(exit_cs5345);
