1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC 4 * Copyright (C) 2007 Hans Verkuil 5 */ 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 16 MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC"); 17 MODULE_AUTHOR("Hans Verkuil"); 18 MODULE_LICENSE("GPL"); 19 20 static bool debug; 21 22 module_param(debug, bool, 0644); 23 24 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); 25 26 struct cs5345_state { 27 struct v4l2_subdev sd; 28 struct v4l2_ctrl_handler hdl; 29 }; 30 31 static inline struct cs5345_state *to_state(struct v4l2_subdev *sd) 32 { 33 return container_of(sd, struct cs5345_state, sd); 34 } 35 36 static 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 43 static 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 50 static 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 57 static 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 69 static 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_DEBUG 86 static 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 93 static 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 #endif 99 100 static 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 /* ----------------------------------------------------------------------- */ 115 116 static const struct v4l2_ctrl_ops cs5345_ctrl_ops = { 117 .s_ctrl = cs5345_s_ctrl, 118 }; 119 120 static const struct v4l2_subdev_core_ops cs5345_core_ops = { 121 .log_status = cs5345_log_status, 122 #ifdef CONFIG_VIDEO_ADV_DEBUG 123 .g_register = cs5345_g_register, 124 .s_register = cs5345_s_register, 125 #endif 126 }; 127 128 static const struct v4l2_subdev_audio_ops cs5345_audio_ops = { 129 .s_routing = cs5345_s_routing, 130 }; 131 132 static const struct v4l2_subdev_ops cs5345_ops = { 133 .core = &cs5345_core_ops, 134 .audio = &cs5345_audio_ops, 135 }; 136 137 /* ----------------------------------------------------------------------- */ 138 139 static int cs5345_probe(struct i2c_client *client, 140 const struct i2c_device_id *id) 141 { 142 struct cs5345_state *state; 143 struct v4l2_subdev *sd; 144 145 /* Check if the adapter supports the needed features */ 146 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 147 return -EIO; 148 149 v4l_info(client, "chip found @ 0x%x (%s)\n", 150 client->addr << 1, client->adapter->name); 151 152 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 153 if (state == NULL) 154 return -ENOMEM; 155 sd = &state->sd; 156 v4l2_i2c_subdev_init(sd, client, &cs5345_ops); 157 158 v4l2_ctrl_handler_init(&state->hdl, 2); 159 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, 160 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 161 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, 162 V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0); 163 sd->ctrl_handler = &state->hdl; 164 if (state->hdl.error) { 165 int err = state->hdl.error; 166 167 v4l2_ctrl_handler_free(&state->hdl); 168 return err; 169 } 170 /* set volume/mute */ 171 v4l2_ctrl_handler_setup(&state->hdl); 172 173 cs5345_write(sd, 0x02, 0x00); 174 cs5345_write(sd, 0x04, 0x01); 175 cs5345_write(sd, 0x09, 0x01); 176 return 0; 177 } 178 179 /* ----------------------------------------------------------------------- */ 180 181 static int cs5345_remove(struct i2c_client *client) 182 { 183 struct v4l2_subdev *sd = i2c_get_clientdata(client); 184 struct cs5345_state *state = to_state(sd); 185 186 v4l2_device_unregister_subdev(sd); 187 v4l2_ctrl_handler_free(&state->hdl); 188 return 0; 189 } 190 191 /* ----------------------------------------------------------------------- */ 192 193 static const struct i2c_device_id cs5345_id[] = { 194 { "cs5345", 0 }, 195 { } 196 }; 197 MODULE_DEVICE_TABLE(i2c, cs5345_id); 198 199 static struct i2c_driver cs5345_driver = { 200 .driver = { 201 .name = "cs5345", 202 }, 203 .probe = cs5345_probe, 204 .remove = cs5345_remove, 205 .id_table = cs5345_id, 206 }; 207 208 module_i2c_driver(cs5345_driver); 209