242 строки
6.3 KiB
C
242 строки
6.3 KiB
C
/*
|
|
* tlv320aic23b - driver version 0.0.1
|
|
*
|
|
* Copyright (C) 2006 Scott Alfter <salfter@ssai.us>
|
|
*
|
|
* Based on wm8775 driver
|
|
*
|
|
* Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
|
|
* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
|
|
*
|
|
* 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/types.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/ioctl.h>
|
|
#include <asm/uaccess.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/videodev2.h>
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-ctrls.h>
|
|
|
|
MODULE_DESCRIPTION("tlv320aic23b driver");
|
|
MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
struct tlv320aic23b_state {
|
|
struct v4l2_subdev sd;
|
|
struct v4l2_ctrl_handler hdl;
|
|
};
|
|
|
|
static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd)
|
|
{
|
|
return container_of(sd, struct tlv320aic23b_state, sd);
|
|
}
|
|
|
|
static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
|
|
{
|
|
return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd;
|
|
}
|
|
|
|
static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
int i;
|
|
|
|
if ((reg < 0 || reg > 9) && (reg != 15)) {
|
|
v4l2_err(sd, "Invalid register R%d\n", reg);
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < 3; i++)
|
|
if (i2c_smbus_write_byte_data(client,
|
|
(reg << 1) | (val >> 8), val & 0xff) == 0)
|
|
return 0;
|
|
v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
|
|
return -1;
|
|
}
|
|
|
|
static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
|
|
{
|
|
switch (freq) {
|
|
case 32000: /* set sample rate to 32 kHz */
|
|
tlv320aic23b_write(sd, 8, 0x018);
|
|
break;
|
|
case 44100: /* set sample rate to 44.1 kHz */
|
|
tlv320aic23b_write(sd, 8, 0x022);
|
|
break;
|
|
case 48000: /* set sample rate to 48 kHz */
|
|
tlv320aic23b_write(sd, 8, 0x000);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct v4l2_subdev *sd = to_sd(ctrl);
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */
|
|
/* set gain on both channels to +3.0 dB */
|
|
if (!ctrl->val)
|
|
tlv320aic23b_write(sd, 0, 0x119);
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int tlv320aic23b_log_status(struct v4l2_subdev *sd)
|
|
{
|
|
struct tlv320aic23b_state *state = to_state(sd);
|
|
|
|
v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
|
|
return 0;
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = {
|
|
.s_ctrl = tlv320aic23b_s_ctrl,
|
|
};
|
|
|
|
static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = {
|
|
.log_status = tlv320aic23b_log_status,
|
|
.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
|
|
.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
|
|
.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
|
|
.g_ctrl = v4l2_subdev_g_ctrl,
|
|
.s_ctrl = v4l2_subdev_s_ctrl,
|
|
.queryctrl = v4l2_subdev_queryctrl,
|
|
.querymenu = v4l2_subdev_querymenu,
|
|
};
|
|
|
|
static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = {
|
|
.s_clock_freq = tlv320aic23b_s_clock_freq,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops tlv320aic23b_ops = {
|
|
.core = &tlv320aic23b_core_ops,
|
|
.audio = &tlv320aic23b_audio_ops,
|
|
};
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
/* i2c implementation */
|
|
|
|
/*
|
|
* Generic i2c probe
|
|
* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
|
|
*/
|
|
|
|
static int tlv320aic23b_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct tlv320aic23b_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 = kzalloc(sizeof(struct tlv320aic23b_state), GFP_KERNEL);
|
|
if (state == NULL)
|
|
return -ENOMEM;
|
|
sd = &state->sd;
|
|
v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops);
|
|
|
|
/* Initialize tlv320aic23b */
|
|
|
|
/* RESET */
|
|
tlv320aic23b_write(sd, 15, 0x000);
|
|
/* turn off DAC & mic input */
|
|
tlv320aic23b_write(sd, 6, 0x00A);
|
|
/* left-justified, 24-bit, master mode */
|
|
tlv320aic23b_write(sd, 7, 0x049);
|
|
/* set gain on both channels to +3.0 dB */
|
|
tlv320aic23b_write(sd, 0, 0x119);
|
|
/* set sample rate to 48 kHz */
|
|
tlv320aic23b_write(sd, 8, 0x000);
|
|
/* activate digital interface */
|
|
tlv320aic23b_write(sd, 9, 0x001);
|
|
|
|
v4l2_ctrl_handler_init(&state->hdl, 1);
|
|
v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_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);
|
|
kfree(state);
|
|
return err;
|
|
}
|
|
v4l2_ctrl_handler_setup(&state->hdl);
|
|
return 0;
|
|
}
|
|
|
|
static int tlv320aic23b_remove(struct i2c_client *client)
|
|
{
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
|
struct tlv320aic23b_state *state = to_state(sd);
|
|
|
|
v4l2_device_unregister_subdev(sd);
|
|
v4l2_ctrl_handler_free(&state->hdl);
|
|
kfree(state);
|
|
return 0;
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
static const struct i2c_device_id tlv320aic23b_id[] = {
|
|
{ "tlv320aic23b", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id);
|
|
|
|
static struct i2c_driver tlv320aic23b_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "tlv320aic23b",
|
|
},
|
|
.probe = tlv320aic23b_probe,
|
|
.remove = tlv320aic23b_remove,
|
|
.id_table = tlv320aic23b_id,
|
|
};
|
|
|
|
static __init int init_tlv320aic23b(void)
|
|
{
|
|
return i2c_add_driver(&tlv320aic23b_driver);
|
|
}
|
|
|
|
static __exit void exit_tlv320aic23b(void)
|
|
{
|
|
i2c_del_driver(&tlv320aic23b_driver);
|
|
}
|
|
|
|
module_init(init_tlv320aic23b);
|
|
module_exit(exit_tlv320aic23b);
|