1 /* 2 * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC 3 * Copyright (C) 2007 Hans Verkuil 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 */ 15 16 17 #include <linux/module.h> 18 #include <linux/kernel.h> 19 #include <linux/i2c.h> 20 #include <linux/videodev2.h> 21 #include <linux/slab.h> 22 #include <media/v4l2-device.h> 23 #include <media/v4l2-ctrls.h> 24 25 MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC"); 26 MODULE_AUTHOR("Hans Verkuil"); 27 MODULE_LICENSE("GPL"); 28 29 static bool debug; 30 31 module_param(debug, bool, 0644); 32 33 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); 34 35 struct cs5345_state { 36 struct v4l2_subdev sd; 37 struct v4l2_ctrl_handler hdl; 38 }; 39 40 static inline struct cs5345_state *to_state(struct v4l2_subdev *sd) 41 { 42 return container_of(sd, struct cs5345_state, sd); 43 } 44 45 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 46 { 47 return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd; 48 } 49 50 /* ----------------------------------------------------------------------- */ 51 52 static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value) 53 { 54 struct i2c_client *client = v4l2_get_subdevdata(sd); 55 56 return i2c_smbus_write_byte_data(client, reg, value); 57 } 58 59 static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg) 60 { 61 struct i2c_client *client = v4l2_get_subdevdata(sd); 62 63 return i2c_smbus_read_byte_data(client, reg); 64 } 65 66 static int cs5345_s_routing(struct v4l2_subdev *sd, 67 u32 input, u32 output, u32 config) 68 { 69 if ((input & 0xf) > 6) { 70 v4l2_err(sd, "Invalid input %d.\n", input); 71 return -EINVAL; 72 } 73 cs5345_write(sd, 0x09, input & 0xf); 74 cs5345_write(sd, 0x05, input & 0xf0); 75 return 0; 76 } 77 78 static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl) 79 { 80 struct v4l2_subdev *sd = to_sd(ctrl); 81 82 switch (ctrl->id) { 83 case V4L2_CID_AUDIO_MUTE: 84 cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0); 85 return 0; 86 case V4L2_CID_AUDIO_VOLUME: 87 cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f); 88 cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f); 89 return 0; 90 } 91 return -EINVAL; 92 } 93 94 #ifdef CONFIG_VIDEO_ADV_DEBUG 95 static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 96 { 97 reg->size = 1; 98 reg->val = cs5345_read(sd, reg->reg & 0x1f); 99 return 0; 100 } 101 102 static int cs5345_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) 103 { 104 cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff); 105 return 0; 106 } 107 #endif 108 109 static int cs5345_log_status(struct v4l2_subdev *sd) 110 { 111 u8 v = cs5345_read(sd, 0x09) & 7; 112 u8 m = cs5345_read(sd, 0x04); 113 int vol = cs5345_read(sd, 0x08) & 0x3f; 114 115 v4l2_info(sd, "Input: %d%s\n", v, 116 (m & 0x80) ? " (muted)" : ""); 117 if (vol >= 32) 118 vol = vol - 64; 119 v4l2_info(sd, "Volume: %d dB\n", vol); 120 return 0; 121 } 122 123 /* ----------------------------------------------------------------------- */ 124 125 static const struct v4l2_ctrl_ops cs5345_ctrl_ops = { 126 .s_ctrl = cs5345_s_ctrl, 127 }; 128 129 static const struct v4l2_subdev_core_ops cs5345_core_ops = { 130 .log_status = cs5345_log_status, 131 #ifdef CONFIG_VIDEO_ADV_DEBUG 132 .g_register = cs5345_g_register, 133 .s_register = cs5345_s_register, 134 #endif 135 }; 136 137 static const struct v4l2_subdev_audio_ops cs5345_audio_ops = { 138 .s_routing = cs5345_s_routing, 139 }; 140 141 static const struct v4l2_subdev_ops cs5345_ops = { 142 .core = &cs5345_core_ops, 143 .audio = &cs5345_audio_ops, 144 }; 145 146 /* ----------------------------------------------------------------------- */ 147 148 static int cs5345_probe(struct i2c_client *client, 149 const struct i2c_device_id *id) 150 { 151 struct cs5345_state *state; 152 struct v4l2_subdev *sd; 153 154 /* Check if the adapter supports the needed features */ 155 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 156 return -EIO; 157 158 v4l_info(client, "chip found @ 0x%x (%s)\n", 159 client->addr << 1, client->adapter->name); 160 161 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 162 if (state == NULL) 163 return -ENOMEM; 164 sd = &state->sd; 165 v4l2_i2c_subdev_init(sd, client, &cs5345_ops); 166 167 v4l2_ctrl_handler_init(&state->hdl, 2); 168 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, 169 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 170 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, 171 V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0); 172 sd->ctrl_handler = &state->hdl; 173 if (state->hdl.error) { 174 int err = state->hdl.error; 175 176 v4l2_ctrl_handler_free(&state->hdl); 177 return err; 178 } 179 /* set volume/mute */ 180 v4l2_ctrl_handler_setup(&state->hdl); 181 182 cs5345_write(sd, 0x02, 0x00); 183 cs5345_write(sd, 0x04, 0x01); 184 cs5345_write(sd, 0x09, 0x01); 185 return 0; 186 } 187 188 /* ----------------------------------------------------------------------- */ 189 190 static int cs5345_remove(struct i2c_client *client) 191 { 192 struct v4l2_subdev *sd = i2c_get_clientdata(client); 193 struct cs5345_state *state = to_state(sd); 194 195 v4l2_device_unregister_subdev(sd); 196 v4l2_ctrl_handler_free(&state->hdl); 197 return 0; 198 } 199 200 /* ----------------------------------------------------------------------- */ 201 202 static const struct i2c_device_id cs5345_id[] = { 203 { "cs5345", 0 }, 204 { } 205 }; 206 MODULE_DEVICE_TABLE(i2c, cs5345_id); 207 208 static struct i2c_driver cs5345_driver = { 209 .driver = { 210 .name = "cs5345", 211 }, 212 .probe = cs5345_probe, 213 .remove = cs5345_remove, 214 .id_table = cs5345_id, 215 }; 216 217 module_i2c_driver(cs5345_driver); 218