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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC4 * Copyright (C) 2007 Hans Verkuil5 */6 7 8#include <linux/module.h>9#include <linux/kernel.h>10#include <linux/i2c.h>11#include <linux/videodev2.h>12#include <linux/slab.h>13#include <media/v4l2-device.h>14#include <media/v4l2-ctrls.h>15 16MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");17MODULE_AUTHOR("Hans Verkuil");18MODULE_LICENSE("GPL");19 20static bool debug;21 22module_param(debug, bool, 0644);23 24MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");25 26struct cs5345_state {27 struct v4l2_subdev sd;28 struct v4l2_ctrl_handler hdl;29};30 31static inline struct cs5345_state *to_state(struct v4l2_subdev *sd)32{33 return container_of(sd, struct cs5345_state, sd);34}35 36static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)37{38 return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd;39}40 41/* ----------------------------------------------------------------------- */42 43static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)44{45 struct i2c_client *client = v4l2_get_subdevdata(sd);46 47 return i2c_smbus_write_byte_data(client, reg, value);48}49 50static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)51{52 struct i2c_client *client = v4l2_get_subdevdata(sd);53 54 return i2c_smbus_read_byte_data(client, reg);55}56 57static int cs5345_s_routing(struct v4l2_subdev *sd,58 u32 input, u32 output, u32 config)59{60 if ((input & 0xf) > 6) {61 v4l2_err(sd, "Invalid input %d.\n", input);62 return -EINVAL;63 }64 cs5345_write(sd, 0x09, input & 0xf);65 cs5345_write(sd, 0x05, input & 0xf0);66 return 0;67}68 69static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl)70{71 struct v4l2_subdev *sd = to_sd(ctrl);72 73 switch (ctrl->id) {74 case V4L2_CID_AUDIO_MUTE:75 cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0);76 return 0;77 case V4L2_CID_AUDIO_VOLUME:78 cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f);79 cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f);80 return 0;81 }82 return -EINVAL;83}84 85#ifdef CONFIG_VIDEO_ADV_DEBUG86static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)87{88 reg->size = 1;89 reg->val = cs5345_read(sd, reg->reg & 0x1f);90 return 0;91}92 93static int cs5345_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)94{95 cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);96 return 0;97}98#endif99 100static int cs5345_log_status(struct v4l2_subdev *sd)101{102 u8 v = cs5345_read(sd, 0x09) & 7;103 u8 m = cs5345_read(sd, 0x04);104 int vol = cs5345_read(sd, 0x08) & 0x3f;105 106 v4l2_info(sd, "Input: %d%s\n", v,107 (m & 0x80) ? " (muted)" : "");108 if (vol >= 32)109 vol = vol - 64;110 v4l2_info(sd, "Volume: %d dB\n", vol);111 return 0;112}113 114/* ----------------------------------------------------------------------- */115 116static const struct v4l2_ctrl_ops cs5345_ctrl_ops = {117 .s_ctrl = cs5345_s_ctrl,118};119 120static const struct v4l2_subdev_core_ops cs5345_core_ops = {121 .log_status = cs5345_log_status,122#ifdef CONFIG_VIDEO_ADV_DEBUG123 .g_register = cs5345_g_register,124 .s_register = cs5345_s_register,125#endif126};127 128static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {129 .s_routing = cs5345_s_routing,130};131 132static const struct v4l2_subdev_ops cs5345_ops = {133 .core = &cs5345_core_ops,134 .audio = &cs5345_audio_ops,135};136 137/* ----------------------------------------------------------------------- */138 139static int cs5345_probe(struct i2c_client *client)140{141 struct cs5345_state *state;142 struct v4l2_subdev *sd;143 144 /* Check if the adapter supports the needed features */145 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))146 return -EIO;147 148 v4l_info(client, "chip found @ 0x%x (%s)\n",149 client->addr << 1, client->adapter->name);150 151 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);152 if (state == NULL)153 return -ENOMEM;154 sd = &state->sd;155 v4l2_i2c_subdev_init(sd, client, &cs5345_ops);156 157 v4l2_ctrl_handler_init(&state->hdl, 2);158 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,159 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);160 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,161 V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0);162 sd->ctrl_handler = &state->hdl;163 if (state->hdl.error) {164 int err = state->hdl.error;165 166 v4l2_ctrl_handler_free(&state->hdl);167 return err;168 }169 /* set volume/mute */170 v4l2_ctrl_handler_setup(&state->hdl);171 172 cs5345_write(sd, 0x02, 0x00);173 cs5345_write(sd, 0x04, 0x01);174 cs5345_write(sd, 0x09, 0x01);175 return 0;176}177 178/* ----------------------------------------------------------------------- */179 180static void cs5345_remove(struct i2c_client *client)181{182 struct v4l2_subdev *sd = i2c_get_clientdata(client);183 struct cs5345_state *state = to_state(sd);184 185 v4l2_device_unregister_subdev(sd);186 v4l2_ctrl_handler_free(&state->hdl);187}188 189/* ----------------------------------------------------------------------- */190 191static const struct i2c_device_id cs5345_id[] = {192 { "cs5345" },193 { }194};195MODULE_DEVICE_TABLE(i2c, cs5345_id);196 197static struct i2c_driver cs5345_driver = {198 .driver = {199 .name = "cs5345",200 },201 .probe = cs5345_probe,202 .remove = cs5345_remove,203 .id_table = cs5345_id,204};205 206module_i2c_driver(cs5345_driver);207