217 lines
5.7 KiB
C
217 lines
5.7 KiB
C
/*
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* cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
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* Copyright (C) 2007 Hans Verkuil
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-i2c-drv.h>
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MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
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MODULE_AUTHOR("Hans Verkuil");
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MODULE_LICENSE("GPL");
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static int debug;
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module_param(debug, bool, 0644);
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MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
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/* ----------------------------------------------------------------------- */
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static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int cs5345_s_routing(struct v4l2_subdev *sd,
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u32 input, u32 output, u32 config)
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{
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if ((input & 0xf) > 6) {
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v4l2_err(sd, "Invalid input %d.\n", input);
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return -EINVAL;
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}
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cs5345_write(sd, 0x09, input & 0xf);
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cs5345_write(sd, 0x05, input & 0xf0);
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return 0;
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}
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static int cs5345_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
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ctrl->value = (cs5345_read(sd, 0x04) & 0x08) != 0;
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return 0;
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}
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if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
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return -EINVAL;
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ctrl->value = cs5345_read(sd, 0x07) & 0x3f;
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if (ctrl->value >= 32)
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ctrl->value = ctrl->value - 64;
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return 0;
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}
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static int cs5345_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
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cs5345_write(sd, 0x04, ctrl->value ? 0x80 : 0);
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return 0;
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}
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if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
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return -EINVAL;
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if (ctrl->value > 24 || ctrl->value < -24)
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return -EINVAL;
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cs5345_write(sd, 0x07, ((u8)ctrl->value) & 0x3f);
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cs5345_write(sd, 0x08, ((u8)ctrl->value) & 0x3f);
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return 0;
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}
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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if (!v4l2_chip_match_i2c_client(client, ®->match))
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return -EINVAL;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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reg->size = 1;
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reg->val = cs5345_read(sd, reg->reg & 0x1f);
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return 0;
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}
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static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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if (!v4l2_chip_match_i2c_client(client, ®->match))
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return -EINVAL;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
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return 0;
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}
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#endif
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static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
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}
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static int cs5345_log_status(struct v4l2_subdev *sd)
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{
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u8 v = cs5345_read(sd, 0x09) & 7;
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u8 m = cs5345_read(sd, 0x04);
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int vol = cs5345_read(sd, 0x08) & 0x3f;
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v4l2_info(sd, "Input: %d%s\n", v,
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(m & 0x80) ? " (muted)" : "");
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if (vol >= 32)
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vol = vol - 64;
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v4l2_info(sd, "Volume: %d dB\n", vol);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_core_ops cs5345_core_ops = {
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.log_status = cs5345_log_status,
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.g_chip_ident = cs5345_g_chip_ident,
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.g_ctrl = cs5345_g_ctrl,
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.s_ctrl = cs5345_s_ctrl,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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.g_register = cs5345_g_register,
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.s_register = cs5345_s_register,
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#endif
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};
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static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
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.s_routing = cs5345_s_routing,
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};
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static const struct v4l2_subdev_ops cs5345_ops = {
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.core = &cs5345_core_ops,
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.audio = &cs5345_audio_ops,
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};
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/* ----------------------------------------------------------------------- */
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static int cs5345_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct v4l2_subdev *sd;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->adapter->name);
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sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
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if (sd == NULL)
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return -ENOMEM;
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v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
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cs5345_write(sd, 0x02, 0x00);
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cs5345_write(sd, 0x04, 0x01);
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cs5345_write(sd, 0x09, 0x01);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static int cs5345_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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v4l2_device_unregister_subdev(sd);
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kfree(sd);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct i2c_device_id cs5345_id[] = {
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{ "cs5345", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, cs5345_id);
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static struct v4l2_i2c_driver_data v4l2_i2c_data = {
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.name = "cs5345",
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.probe = cs5345_probe,
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.remove = cs5345_remove,
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.id_table = cs5345_id,
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};
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