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 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 */ 19 20 21 #include <linux/module.h> 22 #include <linux/kernel.h> 23 #include <linux/i2c.h> 24 #include <linux/videodev2.h> 25 #include <linux/slab.h> 26 #include <media/v4l2-device.h> 27 #include <media/v4l2-ctrls.h> 28 29 MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC"); 30 MODULE_AUTHOR("Hans Verkuil"); 31 MODULE_LICENSE("GPL"); 32 33 static bool debug; 34 35 module_param(debug, bool, 0644); 36 37 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); 38 39 struct cs5345_state { 40 struct v4l2_subdev sd; 41 struct v4l2_ctrl_handler hdl; 42 }; 43 44 static inline struct cs5345_state *to_state(struct v4l2_subdev *sd) 45 { 46 return container_of(sd, struct cs5345_state, sd); 47 } 48 49 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 50 { 51 return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd; 52 } 53 54 /* ----------------------------------------------------------------------- */ 55 56 static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value) 57 { 58 struct i2c_client *client = v4l2_get_subdevdata(sd); 59 60 return i2c_smbus_write_byte_data(client, reg, value); 61 } 62 63 static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg) 64 { 65 struct i2c_client *client = v4l2_get_subdevdata(sd); 66 67 return i2c_smbus_read_byte_data(client, reg); 68 } 69 70 static int cs5345_s_routing(struct v4l2_subdev *sd, 71 u32 input, u32 output, u32 config) 72 { 73 if ((input & 0xf) > 6) { 74 v4l2_err(sd, "Invalid input %d.\n", input); 75 return -EINVAL; 76 } 77 cs5345_write(sd, 0x09, input & 0xf); 78 cs5345_write(sd, 0x05, input & 0xf0); 79 return 0; 80 } 81 82 static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl) 83 { 84 struct v4l2_subdev *sd = to_sd(ctrl); 85 86 switch (ctrl->id) { 87 case V4L2_CID_AUDIO_MUTE: 88 cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0); 89 return 0; 90 case V4L2_CID_AUDIO_VOLUME: 91 cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f); 92 cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f); 93 return 0; 94 } 95 return -EINVAL; 96 } 97 98 #ifdef CONFIG_VIDEO_ADV_DEBUG 99 static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 100 { 101 reg->size = 1; 102 reg->val = cs5345_read(sd, reg->reg & 0x1f); 103 return 0; 104 } 105 106 static int cs5345_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) 107 { 108 cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff); 109 return 0; 110 } 111 #endif 112 113 static int cs5345_log_status(struct v4l2_subdev *sd) 114 { 115 u8 v = cs5345_read(sd, 0x09) & 7; 116 u8 m = cs5345_read(sd, 0x04); 117 int vol = cs5345_read(sd, 0x08) & 0x3f; 118 119 v4l2_info(sd, "Input: %d%s\n", v, 120 (m & 0x80) ? " (muted)" : ""); 121 if (vol >= 32) 122 vol = vol - 64; 123 v4l2_info(sd, "Volume: %d dB\n", vol); 124 return 0; 125 } 126 127 /* ----------------------------------------------------------------------- */ 128 129 static const struct v4l2_ctrl_ops cs5345_ctrl_ops = { 130 .s_ctrl = cs5345_s_ctrl, 131 }; 132 133 static const struct v4l2_subdev_core_ops cs5345_core_ops = { 134 .log_status = cs5345_log_status, 135 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, 136 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, 137 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, 138 .g_ctrl = v4l2_subdev_g_ctrl, 139 .s_ctrl = v4l2_subdev_s_ctrl, 140 .queryctrl = v4l2_subdev_queryctrl, 141 .querymenu = v4l2_subdev_querymenu, 142 #ifdef CONFIG_VIDEO_ADV_DEBUG 143 .g_register = cs5345_g_register, 144 .s_register = cs5345_s_register, 145 #endif 146 }; 147 148 static const struct v4l2_subdev_audio_ops cs5345_audio_ops = { 149 .s_routing = cs5345_s_routing, 150 }; 151 152 static const struct v4l2_subdev_ops cs5345_ops = { 153 .core = &cs5345_core_ops, 154 .audio = &cs5345_audio_ops, 155 }; 156 157 /* ----------------------------------------------------------------------- */ 158 159 static int cs5345_probe(struct i2c_client *client, 160 const struct i2c_device_id *id) 161 { 162 struct cs5345_state *state; 163 struct v4l2_subdev *sd; 164 165 /* Check if the adapter supports the needed features */ 166 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 167 return -EIO; 168 169 v4l_info(client, "chip found @ 0x%x (%s)\n", 170 client->addr << 1, client->adapter->name); 171 172 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 173 if (state == NULL) 174 return -ENOMEM; 175 sd = &state->sd; 176 v4l2_i2c_subdev_init(sd, client, &cs5345_ops); 177 178 v4l2_ctrl_handler_init(&state->hdl, 2); 179 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, 180 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 181 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, 182 V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0); 183 sd->ctrl_handler = &state->hdl; 184 if (state->hdl.error) { 185 int err = state->hdl.error; 186 187 v4l2_ctrl_handler_free(&state->hdl); 188 return err; 189 } 190 /* set volume/mute */ 191 v4l2_ctrl_handler_setup(&state->hdl); 192 193 cs5345_write(sd, 0x02, 0x00); 194 cs5345_write(sd, 0x04, 0x01); 195 cs5345_write(sd, 0x09, 0x01); 196 return 0; 197 } 198 199 /* ----------------------------------------------------------------------- */ 200 201 static int cs5345_remove(struct i2c_client *client) 202 { 203 struct v4l2_subdev *sd = i2c_get_clientdata(client); 204 struct cs5345_state *state = to_state(sd); 205 206 v4l2_device_unregister_subdev(sd); 207 v4l2_ctrl_handler_free(&state->hdl); 208 return 0; 209 } 210 211 /* ----------------------------------------------------------------------- */ 212 213 static const struct i2c_device_id cs5345_id[] = { 214 { "cs5345", 0 }, 215 { } 216 }; 217 MODULE_DEVICE_TABLE(i2c, cs5345_id); 218 219 static struct i2c_driver cs5345_driver = { 220 .driver = { 221 .owner = THIS_MODULE, 222 .name = "cs5345", 223 }, 224 .probe = cs5345_probe, 225 .remove = cs5345_remove, 226 .id_table = cs5345_id, 227 }; 228 229 module_i2c_driver(cs5345_driver); 230