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-chip-ident.h> 28 #include <media/v4l2-ctrls.h> 29 30 MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC"); 31 MODULE_AUTHOR("Hans Verkuil"); 32 MODULE_LICENSE("GPL"); 33 34 static bool debug; 35 36 module_param(debug, bool, 0644); 37 38 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); 39 40 struct cs5345_state { 41 struct v4l2_subdev sd; 42 struct v4l2_ctrl_handler hdl; 43 }; 44 45 static inline struct cs5345_state *to_state(struct v4l2_subdev *sd) 46 { 47 return container_of(sd, struct cs5345_state, sd); 48 } 49 50 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 51 { 52 return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd; 53 } 54 55 /* ----------------------------------------------------------------------- */ 56 57 static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value) 58 { 59 struct i2c_client *client = v4l2_get_subdevdata(sd); 60 61 return i2c_smbus_write_byte_data(client, reg, value); 62 } 63 64 static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg) 65 { 66 struct i2c_client *client = v4l2_get_subdevdata(sd); 67 68 return i2c_smbus_read_byte_data(client, reg); 69 } 70 71 static int cs5345_s_routing(struct v4l2_subdev *sd, 72 u32 input, u32 output, u32 config) 73 { 74 if ((input & 0xf) > 6) { 75 v4l2_err(sd, "Invalid input %d.\n", input); 76 return -EINVAL; 77 } 78 cs5345_write(sd, 0x09, input & 0xf); 79 cs5345_write(sd, 0x05, input & 0xf0); 80 return 0; 81 } 82 83 static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl) 84 { 85 struct v4l2_subdev *sd = to_sd(ctrl); 86 87 switch (ctrl->id) { 88 case V4L2_CID_AUDIO_MUTE: 89 cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0); 90 return 0; 91 case V4L2_CID_AUDIO_VOLUME: 92 cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f); 93 cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f); 94 return 0; 95 } 96 return -EINVAL; 97 } 98 99 #ifdef CONFIG_VIDEO_ADV_DEBUG 100 static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 101 { 102 struct i2c_client *client = v4l2_get_subdevdata(sd); 103 104 if (!v4l2_chip_match_i2c_client(client, ®->match)) 105 return -EINVAL; 106 if (!capable(CAP_SYS_ADMIN)) 107 return -EPERM; 108 reg->size = 1; 109 reg->val = cs5345_read(sd, reg->reg & 0x1f); 110 return 0; 111 } 112 113 static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 114 { 115 struct i2c_client *client = v4l2_get_subdevdata(sd); 116 117 if (!v4l2_chip_match_i2c_client(client, ®->match)) 118 return -EINVAL; 119 if (!capable(CAP_SYS_ADMIN)) 120 return -EPERM; 121 cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff); 122 return 0; 123 } 124 #endif 125 126 static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) 127 { 128 struct i2c_client *client = v4l2_get_subdevdata(sd); 129 130 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0); 131 } 132 133 static int cs5345_log_status(struct v4l2_subdev *sd) 134 { 135 u8 v = cs5345_read(sd, 0x09) & 7; 136 u8 m = cs5345_read(sd, 0x04); 137 int vol = cs5345_read(sd, 0x08) & 0x3f; 138 139 v4l2_info(sd, "Input: %d%s\n", v, 140 (m & 0x80) ? " (muted)" : ""); 141 if (vol >= 32) 142 vol = vol - 64; 143 v4l2_info(sd, "Volume: %d dB\n", vol); 144 return 0; 145 } 146 147 /* ----------------------------------------------------------------------- */ 148 149 static const struct v4l2_ctrl_ops cs5345_ctrl_ops = { 150 .s_ctrl = cs5345_s_ctrl, 151 }; 152 153 static const struct v4l2_subdev_core_ops cs5345_core_ops = { 154 .log_status = cs5345_log_status, 155 .g_chip_ident = cs5345_g_chip_ident, 156 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, 157 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, 158 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, 159 .g_ctrl = v4l2_subdev_g_ctrl, 160 .s_ctrl = v4l2_subdev_s_ctrl, 161 .queryctrl = v4l2_subdev_queryctrl, 162 .querymenu = v4l2_subdev_querymenu, 163 #ifdef CONFIG_VIDEO_ADV_DEBUG 164 .g_register = cs5345_g_register, 165 .s_register = cs5345_s_register, 166 #endif 167 }; 168 169 static const struct v4l2_subdev_audio_ops cs5345_audio_ops = { 170 .s_routing = cs5345_s_routing, 171 }; 172 173 static const struct v4l2_subdev_ops cs5345_ops = { 174 .core = &cs5345_core_ops, 175 .audio = &cs5345_audio_ops, 176 }; 177 178 /* ----------------------------------------------------------------------- */ 179 180 static int cs5345_probe(struct i2c_client *client, 181 const struct i2c_device_id *id) 182 { 183 struct cs5345_state *state; 184 struct v4l2_subdev *sd; 185 186 /* Check if the adapter supports the needed features */ 187 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 188 return -EIO; 189 190 v4l_info(client, "chip found @ 0x%x (%s)\n", 191 client->addr << 1, client->adapter->name); 192 193 state = kzalloc(sizeof(struct cs5345_state), GFP_KERNEL); 194 if (state == NULL) 195 return -ENOMEM; 196 sd = &state->sd; 197 v4l2_i2c_subdev_init(sd, client, &cs5345_ops); 198 199 v4l2_ctrl_handler_init(&state->hdl, 2); 200 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, 201 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 202 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, 203 V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0); 204 sd->ctrl_handler = &state->hdl; 205 if (state->hdl.error) { 206 int err = state->hdl.error; 207 208 v4l2_ctrl_handler_free(&state->hdl); 209 kfree(state); 210 return err; 211 } 212 /* set volume/mute */ 213 v4l2_ctrl_handler_setup(&state->hdl); 214 215 cs5345_write(sd, 0x02, 0x00); 216 cs5345_write(sd, 0x04, 0x01); 217 cs5345_write(sd, 0x09, 0x01); 218 return 0; 219 } 220 221 /* ----------------------------------------------------------------------- */ 222 223 static int cs5345_remove(struct i2c_client *client) 224 { 225 struct v4l2_subdev *sd = i2c_get_clientdata(client); 226 struct cs5345_state *state = to_state(sd); 227 228 v4l2_device_unregister_subdev(sd); 229 v4l2_ctrl_handler_free(&state->hdl); 230 kfree(state); 231 return 0; 232 } 233 234 /* ----------------------------------------------------------------------- */ 235 236 static const struct i2c_device_id cs5345_id[] = { 237 { "cs5345", 0 }, 238 { } 239 }; 240 MODULE_DEVICE_TABLE(i2c, cs5345_id); 241 242 static struct i2c_driver cs5345_driver = { 243 .driver = { 244 .owner = THIS_MODULE, 245 .name = "cs5345", 246 }, 247 .probe = cs5345_probe, 248 .remove = cs5345_remove, 249 .id_table = cs5345_id, 250 }; 251 252 module_i2c_driver(cs5345_driver); 253