aecde8b53b
Since the i2c driver ID will be removed in the near future we have to modify the v4l2 debugging API to use the driver name instead of driver ID. Note that this API is not used in applications other than v4l2-dbg.cpp as it is for debugging and testing only. Should anyone use the old VIDIOC_G_CHIP_IDENT, then this will be logged with a warning that it is deprecated and will be removed in 2.6.30. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
223 lines
6 KiB
C
223 lines
6 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/version.h>
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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, const struct v4l2_routing *route)
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{
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if ((route->input & 0xf) > 6) {
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v4l2_err(sd, "Invalid input %d.\n", route->input);
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return -EINVAL;
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}
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cs5345_write(sd, 0x09, route->input & 0xf);
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cs5345_write(sd, 0x05, route->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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static int cs5345_command(struct i2c_client *client, unsigned cmd, void *arg)
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{
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return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
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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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.driverid = I2C_DRIVERID_CS5345,
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.command = cs5345_command,
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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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