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208 lines
5.0 KiB
208 lines
5.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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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#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 <linux/slab.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ctrls.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 bool 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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struct cs5345_state { |
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struct v4l2_subdev sd; |
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struct v4l2_ctrl_handler hdl; |
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}; |
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static inline struct cs5345_state *to_state(struct v4l2_subdev *sd) |
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{ |
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return container_of(sd, struct cs5345_state, sd); |
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} |
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static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) |
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{ |
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return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd; |
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} |
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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_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct v4l2_subdev *sd = to_sd(ctrl); |
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switch (ctrl->id) { |
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case V4L2_CID_AUDIO_MUTE: |
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cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0); |
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return 0; |
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case V4L2_CID_AUDIO_VOLUME: |
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cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f); |
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cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f); |
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return 0; |
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} |
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return -EINVAL; |
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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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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, const struct v4l2_dbg_register *reg) |
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{ |
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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_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_ctrl_ops cs5345_ctrl_ops = { |
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.s_ctrl = cs5345_s_ctrl, |
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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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#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 cs5345_state *state; |
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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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state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); |
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if (state == NULL) |
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return -ENOMEM; |
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sd = &state->sd; |
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v4l2_i2c_subdev_init(sd, client, &cs5345_ops); |
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v4l2_ctrl_handler_init(&state->hdl, 2); |
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v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, |
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V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); |
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v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, |
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V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0); |
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sd->ctrl_handler = &state->hdl; |
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if (state->hdl.error) { |
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int err = state->hdl.error; |
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v4l2_ctrl_handler_free(&state->hdl); |
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return err; |
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} |
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/* set volume/mute */ |
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v4l2_ctrl_handler_setup(&state->hdl); |
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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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struct cs5345_state *state = to_state(sd); |
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v4l2_device_unregister_subdev(sd); |
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v4l2_ctrl_handler_free(&state->hdl); |
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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 i2c_driver cs5345_driver = { |
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.driver = { |
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.name = "cs5345", |
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}, |
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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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module_i2c_driver(cs5345_driver);
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