tlv320aic23b.c (5271B)
1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * tlv320aic23b - driver version 0.0.1 4 * 5 * Copyright (C) 2006 Scott Alfter <salfter@ssai.us> 6 * 7 * Based on wm8775 driver 8 * 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 probe 129 * 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 const struct i2c_device_id *id) 134{ 135 struct tlv320aic23b_state *state; 136 struct v4l2_subdev *sd; 137 138 /* Check if the adapter supports the needed features */ 139 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 140 return -EIO; 141 142 v4l_info(client, "chip found @ 0x%x (%s)\n", 143 client->addr << 1, client->adapter->name); 144 145 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 146 if (state == NULL) 147 return -ENOMEM; 148 sd = &state->sd; 149 v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops); 150 151 /* Initialize tlv320aic23b */ 152 153 /* RESET */ 154 tlv320aic23b_write(sd, 15, 0x000); 155 /* turn off DAC & mic input */ 156 tlv320aic23b_write(sd, 6, 0x00A); 157 /* left-justified, 24-bit, master mode */ 158 tlv320aic23b_write(sd, 7, 0x049); 159 /* set gain on both channels to +3.0 dB */ 160 tlv320aic23b_write(sd, 0, 0x119); 161 /* set sample rate to 48 kHz */ 162 tlv320aic23b_write(sd, 8, 0x000); 163 /* activate digital interface */ 164 tlv320aic23b_write(sd, 9, 0x001); 165 166 v4l2_ctrl_handler_init(&state->hdl, 1); 167 v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops, 168 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 169 sd->ctrl_handler = &state->hdl; 170 if (state->hdl.error) { 171 int err = state->hdl.error; 172 173 v4l2_ctrl_handler_free(&state->hdl); 174 return err; 175 } 176 v4l2_ctrl_handler_setup(&state->hdl); 177 return 0; 178} 179 180static int tlv320aic23b_remove(struct i2c_client *client) 181{ 182 struct v4l2_subdev *sd = i2c_get_clientdata(client); 183 struct tlv320aic23b_state *state = to_state(sd); 184 185 v4l2_device_unregister_subdev(sd); 186 v4l2_ctrl_handler_free(&state->hdl); 187 return 0; 188} 189 190/* ----------------------------------------------------------------------- */ 191 192static const struct i2c_device_id tlv320aic23b_id[] = { 193 { "tlv320aic23b", 0 }, 194 { } 195}; 196MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id); 197 198static struct i2c_driver tlv320aic23b_driver = { 199 .driver = { 200 .name = "tlv320aic23b", 201 }, 202 .probe = tlv320aic23b_probe, 203 .remove = tlv320aic23b_remove, 204 .id_table = tlv320aic23b_id, 205}; 206 207module_i2c_driver(tlv320aic23b_driver);