1 /* 2 * wm8775 - driver version 0.0.1 3 * 4 * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to> 5 * 6 * Based on saa7115 driver 7 * 8 * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl> 9 * - Cleanup 10 * - V4L2 API update 11 * - sound fixes 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 */ 23 24 #include <linux/module.h> 25 #include <linux/types.h> 26 #include <linux/slab.h> 27 #include <linux/ioctl.h> 28 #include <linux/uaccess.h> 29 #include <linux/i2c.h> 30 #include <linux/videodev2.h> 31 #include <media/v4l2-device.h> 32 #include <media/v4l2-ctrls.h> 33 #include <media/i2c/wm8775.h> 34 35 MODULE_DESCRIPTION("wm8775 driver"); 36 MODULE_AUTHOR("Ulf Eklund, Hans Verkuil"); 37 MODULE_LICENSE("GPL"); 38 39 40 41 /* ----------------------------------------------------------------------- */ 42 43 enum { 44 R7 = 7, R11 = 11, 45 R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R23 = 23, 46 TOT_REGS 47 }; 48 49 #define ALC_HOLD 0x85 /* R17: use zero cross detection, ALC hold time 42.6 ms */ 50 #define ALC_EN 0x100 /* R17: ALC enable */ 51 52 struct wm8775_state { 53 struct v4l2_subdev sd; 54 struct v4l2_ctrl_handler hdl; 55 struct v4l2_ctrl *mute; 56 struct v4l2_ctrl *vol; 57 struct v4l2_ctrl *bal; 58 struct v4l2_ctrl *loud; 59 u8 input; /* Last selected input (0-0xf) */ 60 }; 61 62 static inline struct wm8775_state *to_state(struct v4l2_subdev *sd) 63 { 64 return container_of(sd, struct wm8775_state, sd); 65 } 66 67 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 68 { 69 return &container_of(ctrl->handler, struct wm8775_state, hdl)->sd; 70 } 71 72 static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val) 73 { 74 struct i2c_client *client = v4l2_get_subdevdata(sd); 75 int i; 76 77 if (reg < 0 || reg >= TOT_REGS) { 78 v4l2_err(sd, "Invalid register R%d\n", reg); 79 return -1; 80 } 81 82 for (i = 0; i < 3; i++) 83 if (i2c_smbus_write_byte_data(client, 84 (reg << 1) | (val >> 8), val & 0xff) == 0) 85 return 0; 86 v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); 87 return -1; 88 } 89 90 static void wm8775_set_audio(struct v4l2_subdev *sd, int quietly) 91 { 92 struct wm8775_state *state = to_state(sd); 93 u8 vol_l, vol_r; 94 int muted = 0 != state->mute->val; 95 u16 volume = (u16)state->vol->val; 96 u16 balance = (u16)state->bal->val; 97 98 /* normalize ( 65535 to 0 -> 255 to 0 (+24dB to -103dB) ) */ 99 vol_l = (min(65536 - balance, 32768) * volume) >> 23; 100 vol_r = (min(balance, (u16)32768) * volume) >> 23; 101 102 /* Mute */ 103 if (muted || quietly) 104 wm8775_write(sd, R21, 0x0c0 | state->input); 105 106 wm8775_write(sd, R14, vol_l | 0x100); /* 0x100= Left channel ADC zero cross enable */ 107 wm8775_write(sd, R15, vol_r | 0x100); /* 0x100= Right channel ADC zero cross enable */ 108 109 /* Un-mute */ 110 if (!muted) 111 wm8775_write(sd, R21, state->input); 112 } 113 114 static int wm8775_s_routing(struct v4l2_subdev *sd, 115 u32 input, u32 output, u32 config) 116 { 117 struct wm8775_state *state = to_state(sd); 118 119 /* There are 4 inputs and one output. Zero or more inputs 120 are multiplexed together to the output. Hence there are 121 16 combinations. 122 If only one input is active (the normal case) then the 123 input values 1, 2, 4 or 8 should be used. */ 124 if (input > 15) { 125 v4l2_err(sd, "Invalid input %d.\n", input); 126 return -EINVAL; 127 } 128 state->input = input; 129 if (v4l2_ctrl_g_ctrl(state->mute)) 130 return 0; 131 if (!v4l2_ctrl_g_ctrl(state->vol)) 132 return 0; 133 wm8775_set_audio(sd, 1); 134 return 0; 135 } 136 137 static int wm8775_s_ctrl(struct v4l2_ctrl *ctrl) 138 { 139 struct v4l2_subdev *sd = to_sd(ctrl); 140 141 switch (ctrl->id) { 142 case V4L2_CID_AUDIO_MUTE: 143 case V4L2_CID_AUDIO_VOLUME: 144 case V4L2_CID_AUDIO_BALANCE: 145 wm8775_set_audio(sd, 0); 146 return 0; 147 case V4L2_CID_AUDIO_LOUDNESS: 148 wm8775_write(sd, R17, (ctrl->val ? ALC_EN : 0) | ALC_HOLD); 149 return 0; 150 } 151 return -EINVAL; 152 } 153 154 static int wm8775_log_status(struct v4l2_subdev *sd) 155 { 156 struct wm8775_state *state = to_state(sd); 157 158 v4l2_info(sd, "Input: %d\n", state->input); 159 v4l2_ctrl_handler_log_status(&state->hdl, sd->name); 160 return 0; 161 } 162 163 static int wm8775_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq) 164 { 165 wm8775_set_audio(sd, 0); 166 return 0; 167 } 168 169 /* ----------------------------------------------------------------------- */ 170 171 static const struct v4l2_ctrl_ops wm8775_ctrl_ops = { 172 .s_ctrl = wm8775_s_ctrl, 173 }; 174 175 static const struct v4l2_subdev_core_ops wm8775_core_ops = { 176 .log_status = wm8775_log_status, 177 }; 178 179 static const struct v4l2_subdev_tuner_ops wm8775_tuner_ops = { 180 .s_frequency = wm8775_s_frequency, 181 }; 182 183 static const struct v4l2_subdev_audio_ops wm8775_audio_ops = { 184 .s_routing = wm8775_s_routing, 185 }; 186 187 static const struct v4l2_subdev_ops wm8775_ops = { 188 .core = &wm8775_core_ops, 189 .tuner = &wm8775_tuner_ops, 190 .audio = &wm8775_audio_ops, 191 }; 192 193 /* ----------------------------------------------------------------------- */ 194 195 /* i2c implementation */ 196 197 /* 198 * Generic i2c probe 199 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 200 */ 201 202 static int wm8775_probe(struct i2c_client *client, 203 const struct i2c_device_id *id) 204 { 205 struct wm8775_state *state; 206 struct v4l2_subdev *sd; 207 int err; 208 bool is_nova_s = false; 209 210 if (client->dev.platform_data) { 211 struct wm8775_platform_data *data = client->dev.platform_data; 212 is_nova_s = data->is_nova_s; 213 } 214 215 /* Check if the adapter supports the needed features */ 216 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 217 return -EIO; 218 219 v4l_info(client, "chip found @ 0x%02x (%s)\n", 220 client->addr << 1, client->adapter->name); 221 222 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 223 if (state == NULL) 224 return -ENOMEM; 225 sd = &state->sd; 226 v4l2_i2c_subdev_init(sd, client, &wm8775_ops); 227 state->input = 2; 228 229 v4l2_ctrl_handler_init(&state->hdl, 4); 230 state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 231 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 232 state->vol = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 233 V4L2_CID_AUDIO_VOLUME, 0, 65535, (65535+99)/100, 0xCF00); /* 0dB*/ 234 state->bal = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 235 V4L2_CID_AUDIO_BALANCE, 0, 65535, (65535+99)/100, 32768); 236 state->loud = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 237 V4L2_CID_AUDIO_LOUDNESS, 0, 1, 1, 1); 238 sd->ctrl_handler = &state->hdl; 239 err = state->hdl.error; 240 if (err) { 241 v4l2_ctrl_handler_free(&state->hdl); 242 return err; 243 } 244 245 /* Initialize wm8775 */ 246 247 /* RESET */ 248 wm8775_write(sd, R23, 0x000); 249 /* Disable zero cross detect timeout */ 250 wm8775_write(sd, R7, 0x000); 251 /* HPF enable, left justified, 24-bit (Philips) mode */ 252 wm8775_write(sd, R11, 0x021); 253 /* Master mode, clock ratio 256fs */ 254 wm8775_write(sd, R12, 0x102); 255 /* Powered up */ 256 wm8775_write(sd, R13, 0x000); 257 258 if (!is_nova_s) { 259 /* ADC gain +2.5dB, enable zero cross */ 260 wm8775_write(sd, R14, 0x1d4); 261 /* ADC gain +2.5dB, enable zero cross */ 262 wm8775_write(sd, R15, 0x1d4); 263 /* ALC Stereo, ALC target level -1dB FS max gain +8dB */ 264 wm8775_write(sd, R16, 0x1bf); 265 /* Enable gain control, use zero cross detection, 266 ALC hold time 42.6 ms */ 267 wm8775_write(sd, R17, 0x185); 268 } else { 269 /* ALC stereo, ALC target level -5dB FS, ALC max gain +8dB */ 270 wm8775_write(sd, R16, 0x1bb); 271 /* Set ALC mode and hold time */ 272 wm8775_write(sd, R17, (state->loud->val ? ALC_EN : 0) | ALC_HOLD); 273 } 274 /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */ 275 wm8775_write(sd, R18, 0x0a2); 276 /* Enable noise gate, threshold -72dBfs */ 277 wm8775_write(sd, R19, 0x005); 278 if (!is_nova_s) { 279 /* Transient window 4ms, lower PGA gain limit -1dB */ 280 wm8775_write(sd, R20, 0x07a); 281 /* LRBOTH = 1, use input 2. */ 282 wm8775_write(sd, R21, 0x102); 283 } else { 284 /* Transient window 4ms, ALC min gain -5dB */ 285 wm8775_write(sd, R20, 0x0fb); 286 287 wm8775_set_audio(sd, 1); /* set volume/mute/mux */ 288 } 289 return 0; 290 } 291 292 static int wm8775_remove(struct i2c_client *client) 293 { 294 struct v4l2_subdev *sd = i2c_get_clientdata(client); 295 struct wm8775_state *state = to_state(sd); 296 297 v4l2_device_unregister_subdev(sd); 298 v4l2_ctrl_handler_free(&state->hdl); 299 return 0; 300 } 301 302 static const struct i2c_device_id wm8775_id[] = { 303 { "wm8775", 0 }, 304 { } 305 }; 306 MODULE_DEVICE_TABLE(i2c, wm8775_id); 307 308 static struct i2c_driver wm8775_driver = { 309 .driver = { 310 .name = "wm8775", 311 }, 312 .probe = wm8775_probe, 313 .remove = wm8775_remove, 314 .id_table = wm8775_id, 315 }; 316 317 module_i2c_driver(wm8775_driver); 318