linux-stable/drivers/media/i2c/cs5345.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
Based on 3 normalized pattern(s):

  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

  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 [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] 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

  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 [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] 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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

208 lines
5 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
* Copyright (C) 2007 Hans Verkuil
*/
#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);
}
static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd;
}
/* ----------------------------------------------------------------------- */
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_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;
}
#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;
}
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;
}
#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;
}
/* ----------------------------------------------------------------------- */
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;
}
/* ----------------------------------------------------------------------- */
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;
}
/* ----------------------------------------------------------------------- */
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);