diff options
Diffstat (limited to 'drivers/media/i2c/cs5345.c')
| -rw-r--r-- | drivers/media/i2c/cs5345.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/drivers/media/i2c/cs5345.c b/drivers/media/i2c/cs5345.c new file mode 100644 index 00000000000..34b76a9e751 --- /dev/null +++ b/drivers/media/i2c/cs5345.c @@ -0,0 +1,229 @@ +/* + * 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-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, + .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, +#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 = { + .owner = THIS_MODULE, + .name = "cs5345", + }, + .probe = cs5345_probe, + .remove = cs5345_remove, + .id_table = cs5345_id, +}; + +module_i2c_driver(cs5345_driver); |