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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * tlv320aic23b - driver version 0.0.14 *5 * Copyright (C) 2006 Scott Alfter <salfter@ssai.us>6 *7 * Based on wm8775 driver8 *9 * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>10 * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>11 */12 13#include <linux/module.h>14#include <linux/types.h>15#include <linux/slab.h>16#include <linux/ioctl.h>17#include <linux/uaccess.h>18#include <linux/i2c.h>19#include <linux/videodev2.h>20#include <media/v4l2-device.h>21#include <media/v4l2-ctrls.h>22 23MODULE_DESCRIPTION("tlv320aic23b driver");24MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");25MODULE_LICENSE("GPL");26 27 28/* ----------------------------------------------------------------------- */29 30struct tlv320aic23b_state {31 struct v4l2_subdev sd;32 struct v4l2_ctrl_handler hdl;33};34 35static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd)36{37 return container_of(sd, struct tlv320aic23b_state, sd);38}39 40static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)41{42 return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd;43}44 45static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val)46{47 struct i2c_client *client = v4l2_get_subdevdata(sd);48 int i;49 50 if ((reg < 0 || reg > 9) && (reg != 15)) {51 v4l2_err(sd, "Invalid register R%d\n", reg);52 return -1;53 }54 55 for (i = 0; i < 3; i++)56 if (i2c_smbus_write_byte_data(client,57 (reg << 1) | (val >> 8), val & 0xff) == 0)58 return 0;59 v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);60 return -1;61}62 63static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq)64{65 switch (freq) {66 case 32000: /* set sample rate to 32 kHz */67 tlv320aic23b_write(sd, 8, 0x018);68 break;69 case 44100: /* set sample rate to 44.1 kHz */70 tlv320aic23b_write(sd, 8, 0x022);71 break;72 case 48000: /* set sample rate to 48 kHz */73 tlv320aic23b_write(sd, 8, 0x000);74 break;75 default:76 return -EINVAL;77 }78 return 0;79}80 81static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl)82{83 struct v4l2_subdev *sd = to_sd(ctrl);84 85 switch (ctrl->id) {86 case V4L2_CID_AUDIO_MUTE:87 tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */88 /* set gain on both channels to +3.0 dB */89 if (!ctrl->val)90 tlv320aic23b_write(sd, 0, 0x119);91 return 0;92 }93 return -EINVAL;94}95 96static int tlv320aic23b_log_status(struct v4l2_subdev *sd)97{98 struct tlv320aic23b_state *state = to_state(sd);99 100 v4l2_ctrl_handler_log_status(&state->hdl, sd->name);101 return 0;102}103 104/* ----------------------------------------------------------------------- */105 106static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = {107 .s_ctrl = tlv320aic23b_s_ctrl,108};109 110static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = {111 .log_status = tlv320aic23b_log_status,112};113 114static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = {115 .s_clock_freq = tlv320aic23b_s_clock_freq,116};117 118static const struct v4l2_subdev_ops tlv320aic23b_ops = {119 .core = &tlv320aic23b_core_ops,120 .audio = &tlv320aic23b_audio_ops,121};122 123/* ----------------------------------------------------------------------- */124 125/* i2c implementation */126 127/*128 * Generic i2c probe129 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'130 */131 132static int tlv320aic23b_probe(struct i2c_client *client)133{134 struct tlv320aic23b_state *state;135 struct v4l2_subdev *sd;136 137 /* Check if the adapter supports the needed features */138 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))139 return -EIO;140 141 v4l_info(client, "chip found @ 0x%x (%s)\n",142 client->addr << 1, client->adapter->name);143 144 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);145 if (state == NULL)146 return -ENOMEM;147 sd = &state->sd;148 v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops);149 150 /* Initialize tlv320aic23b */151 152 /* RESET */153 tlv320aic23b_write(sd, 15, 0x000);154 /* turn off DAC & mic input */155 tlv320aic23b_write(sd, 6, 0x00A);156 /* left-justified, 24-bit, master mode */157 tlv320aic23b_write(sd, 7, 0x049);158 /* set gain on both channels to +3.0 dB */159 tlv320aic23b_write(sd, 0, 0x119);160 /* set sample rate to 48 kHz */161 tlv320aic23b_write(sd, 8, 0x000);162 /* activate digital interface */163 tlv320aic23b_write(sd, 9, 0x001);164 165 v4l2_ctrl_handler_init(&state->hdl, 1);166 v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops,167 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);168 sd->ctrl_handler = &state->hdl;169 if (state->hdl.error) {170 int err = state->hdl.error;171 172 v4l2_ctrl_handler_free(&state->hdl);173 return err;174 }175 v4l2_ctrl_handler_setup(&state->hdl);176 return 0;177}178 179static void tlv320aic23b_remove(struct i2c_client *client)180{181 struct v4l2_subdev *sd = i2c_get_clientdata(client);182 struct tlv320aic23b_state *state = to_state(sd);183 184 v4l2_device_unregister_subdev(sd);185 v4l2_ctrl_handler_free(&state->hdl);186}187 188/* ----------------------------------------------------------------------- */189 190static const struct i2c_device_id tlv320aic23b_id[] = {191 { "tlv320aic23b" },192 { }193};194MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id);195 196static struct i2c_driver tlv320aic23b_driver = {197 .driver = {198 .name = "tlv320aic23b",199 },200 .probe = tlv320aic23b_probe,201 .remove = tlv320aic23b_remove,202 .id_table = tlv320aic23b_id,203};204 205module_i2c_driver(tlv320aic23b_driver);206