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207 lines
5.1 KiB
207 lines
5.1 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* tlv320aic23b - driver version 0.0.1 |
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* |
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* Copyright (C) 2006 Scott Alfter <[email protected]> |
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* |
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* Based on wm8775 driver |
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* |
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* Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to> |
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* Copyright (C) 2005 Hans Verkuil <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/slab.h> |
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#include <linux/ioctl.h> |
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#include <linux/uaccess.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-ctrls.h> |
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MODULE_DESCRIPTION("tlv320aic23b driver"); |
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MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil"); |
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MODULE_LICENSE("GPL"); |
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/* ----------------------------------------------------------------------- */ |
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struct tlv320aic23b_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 tlv320aic23b_state *to_state(struct v4l2_subdev *sd) |
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{ |
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return container_of(sd, struct tlv320aic23b_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 tlv320aic23b_state, hdl)->sd; |
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} |
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static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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int i; |
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if ((reg < 0 || reg > 9) && (reg != 15)) { |
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v4l2_err(sd, "Invalid register R%d\n", reg); |
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return -1; |
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} |
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for (i = 0; i < 3; i++) |
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if (i2c_smbus_write_byte_data(client, |
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(reg << 1) | (val >> 8), val & 0xff) == 0) |
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return 0; |
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v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); |
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return -1; |
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} |
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static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq) |
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{ |
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switch (freq) { |
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case 32000: /* set sample rate to 32 kHz */ |
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tlv320aic23b_write(sd, 8, 0x018); |
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break; |
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case 44100: /* set sample rate to 44.1 kHz */ |
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tlv320aic23b_write(sd, 8, 0x022); |
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break; |
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case 48000: /* set sample rate to 48 kHz */ |
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tlv320aic23b_write(sd, 8, 0x000); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int tlv320aic23b_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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tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */ |
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/* set gain on both channels to +3.0 dB */ |
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if (!ctrl->val) |
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tlv320aic23b_write(sd, 0, 0x119); |
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return 0; |
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} |
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return -EINVAL; |
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} |
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static int tlv320aic23b_log_status(struct v4l2_subdev *sd) |
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{ |
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struct tlv320aic23b_state *state = to_state(sd); |
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v4l2_ctrl_handler_log_status(&state->hdl, sd->name); |
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return 0; |
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} |
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/* ----------------------------------------------------------------------- */ |
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static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = { |
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.s_ctrl = tlv320aic23b_s_ctrl, |
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}; |
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static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = { |
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.log_status = tlv320aic23b_log_status, |
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}; |
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static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = { |
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.s_clock_freq = tlv320aic23b_s_clock_freq, |
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}; |
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static const struct v4l2_subdev_ops tlv320aic23b_ops = { |
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.core = &tlv320aic23b_core_ops, |
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.audio = &tlv320aic23b_audio_ops, |
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}; |
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/* ----------------------------------------------------------------------- */ |
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/* i2c implementation */ |
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/* |
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* Generic i2c probe |
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' |
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*/ |
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static int tlv320aic23b_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct tlv320aic23b_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, &tlv320aic23b_ops); |
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/* Initialize tlv320aic23b */ |
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/* RESET */ |
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tlv320aic23b_write(sd, 15, 0x000); |
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/* turn off DAC & mic input */ |
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tlv320aic23b_write(sd, 6, 0x00A); |
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/* left-justified, 24-bit, master mode */ |
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tlv320aic23b_write(sd, 7, 0x049); |
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/* set gain on both channels to +3.0 dB */ |
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tlv320aic23b_write(sd, 0, 0x119); |
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/* set sample rate to 48 kHz */ |
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tlv320aic23b_write(sd, 8, 0x000); |
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/* activate digital interface */ |
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tlv320aic23b_write(sd, 9, 0x001); |
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v4l2_ctrl_handler_init(&state->hdl, 1); |
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v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops, |
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V4L2_CID_AUDIO_MUTE, 0, 1, 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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v4l2_ctrl_handler_setup(&state->hdl); |
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return 0; |
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} |
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static int tlv320aic23b_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 tlv320aic23b_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 tlv320aic23b_id[] = { |
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{ "tlv320aic23b", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id); |
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static struct i2c_driver tlv320aic23b_driver = { |
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.driver = { |
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.name = "tlv320aic23b", |
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}, |
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.probe = tlv320aic23b_probe, |
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.remove = tlv320aic23b_remove, |
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.id_table = tlv320aic23b_id, |
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}; |
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module_i2c_driver(tlv320aic23b_driver);
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