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 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 26 */ 27 28 #include <linux/module.h> 29 #include <linux/types.h> 30 #include <linux/slab.h> 31 #include <linux/ioctl.h> 32 #include <asm/uaccess.h> 33 #include <linux/i2c.h> 34 #include <linux/videodev2.h> 35 #include <media/v4l2-device.h> 36 #include <media/v4l2-ctrls.h> 37 #include <media/wm8775.h> 38 39 MODULE_DESCRIPTION("wm8775 driver"); 40 MODULE_AUTHOR("Ulf Eklund, Hans Verkuil"); 41 MODULE_LICENSE("GPL"); 42 43 44 45 /* ----------------------------------------------------------------------- */ 46 47 enum { 48 R7 = 7, R11 = 11, 49 R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R23 = 23, 50 TOT_REGS 51 }; 52 53 #define ALC_HOLD 0x85 /* R17: use zero cross detection, ALC hold time 42.6 ms */ 54 #define ALC_EN 0x100 /* R17: ALC enable */ 55 56 struct wm8775_state { 57 struct v4l2_subdev sd; 58 struct v4l2_ctrl_handler hdl; 59 struct v4l2_ctrl *mute; 60 struct v4l2_ctrl *vol; 61 struct v4l2_ctrl *bal; 62 struct v4l2_ctrl *loud; 63 u8 input; /* Last selected input (0-0xf) */ 64 }; 65 66 static inline struct wm8775_state *to_state(struct v4l2_subdev *sd) 67 { 68 return container_of(sd, struct wm8775_state, sd); 69 } 70 71 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 72 { 73 return &container_of(ctrl->handler, struct wm8775_state, hdl)->sd; 74 } 75 76 static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val) 77 { 78 struct i2c_client *client = v4l2_get_subdevdata(sd); 79 int i; 80 81 if (reg < 0 || reg >= TOT_REGS) { 82 v4l2_err(sd, "Invalid register R%d\n", reg); 83 return -1; 84 } 85 86 for (i = 0; i < 3; i++) 87 if (i2c_smbus_write_byte_data(client, 88 (reg << 1) | (val >> 8), val & 0xff) == 0) 89 return 0; 90 v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); 91 return -1; 92 } 93 94 static void wm8775_set_audio(struct v4l2_subdev *sd, int quietly) 95 { 96 struct wm8775_state *state = to_state(sd); 97 u8 vol_l, vol_r; 98 int muted = 0 != state->mute->val; 99 u16 volume = (u16)state->vol->val; 100 u16 balance = (u16)state->bal->val; 101 102 /* normalize ( 65535 to 0 -> 255 to 0 (+24dB to -103dB) ) */ 103 vol_l = (min(65536 - balance, 32768) * volume) >> 23; 104 vol_r = (min(balance, (u16)32768) * volume) >> 23; 105 106 /* Mute */ 107 if (muted || quietly) 108 wm8775_write(sd, R21, 0x0c0 | state->input); 109 110 wm8775_write(sd, R14, vol_l | 0x100); /* 0x100= Left channel ADC zero cross enable */ 111 wm8775_write(sd, R15, vol_r | 0x100); /* 0x100= Right channel ADC zero cross enable */ 112 113 /* Un-mute */ 114 if (!muted) 115 wm8775_write(sd, R21, state->input); 116 } 117 118 static int wm8775_s_routing(struct v4l2_subdev *sd, 119 u32 input, u32 output, u32 config) 120 { 121 struct wm8775_state *state = to_state(sd); 122 123 /* There are 4 inputs and one output. Zero or more inputs 124 are multiplexed together to the output. Hence there are 125 16 combinations. 126 If only one input is active (the normal case) then the 127 input values 1, 2, 4 or 8 should be used. */ 128 if (input > 15) { 129 v4l2_err(sd, "Invalid input %d.\n", input); 130 return -EINVAL; 131 } 132 state->input = input; 133 if (!v4l2_ctrl_g_ctrl(state->mute)) 134 return 0; 135 if (!v4l2_ctrl_g_ctrl(state->vol)) 136 return 0; 137 if (!v4l2_ctrl_g_ctrl(state->bal)) 138 return 0; 139 wm8775_set_audio(sd, 1); 140 return 0; 141 } 142 143 static int wm8775_s_ctrl(struct v4l2_ctrl *ctrl) 144 { 145 struct v4l2_subdev *sd = to_sd(ctrl); 146 147 switch (ctrl->id) { 148 case V4L2_CID_AUDIO_MUTE: 149 case V4L2_CID_AUDIO_VOLUME: 150 case V4L2_CID_AUDIO_BALANCE: 151 wm8775_set_audio(sd, 0); 152 return 0; 153 case V4L2_CID_AUDIO_LOUDNESS: 154 wm8775_write(sd, R17, (ctrl->val ? ALC_EN : 0) | ALC_HOLD); 155 return 0; 156 } 157 return -EINVAL; 158 } 159 160 static int wm8775_log_status(struct v4l2_subdev *sd) 161 { 162 struct wm8775_state *state = to_state(sd); 163 164 v4l2_info(sd, "Input: %d\n", state->input); 165 v4l2_ctrl_handler_log_status(&state->hdl, sd->name); 166 return 0; 167 } 168 169 static int wm8775_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq) 170 { 171 wm8775_set_audio(sd, 0); 172 return 0; 173 } 174 175 /* ----------------------------------------------------------------------- */ 176 177 static const struct v4l2_ctrl_ops wm8775_ctrl_ops = { 178 .s_ctrl = wm8775_s_ctrl, 179 }; 180 181 static const struct v4l2_subdev_core_ops wm8775_core_ops = { 182 .log_status = wm8775_log_status, 183 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, 184 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, 185 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, 186 .g_ctrl = v4l2_subdev_g_ctrl, 187 .s_ctrl = v4l2_subdev_s_ctrl, 188 .queryctrl = v4l2_subdev_queryctrl, 189 .querymenu = v4l2_subdev_querymenu, 190 }; 191 192 static const struct v4l2_subdev_tuner_ops wm8775_tuner_ops = { 193 .s_frequency = wm8775_s_frequency, 194 }; 195 196 static const struct v4l2_subdev_audio_ops wm8775_audio_ops = { 197 .s_routing = wm8775_s_routing, 198 }; 199 200 static const struct v4l2_subdev_ops wm8775_ops = { 201 .core = &wm8775_core_ops, 202 .tuner = &wm8775_tuner_ops, 203 .audio = &wm8775_audio_ops, 204 }; 205 206 /* ----------------------------------------------------------------------- */ 207 208 /* i2c implementation */ 209 210 /* 211 * Generic i2c probe 212 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 213 */ 214 215 static int wm8775_probe(struct i2c_client *client, 216 const struct i2c_device_id *id) 217 { 218 struct wm8775_state *state; 219 struct v4l2_subdev *sd; 220 int err; 221 bool is_nova_s = false; 222 223 if (client->dev.platform_data) { 224 struct wm8775_platform_data *data = client->dev.platform_data; 225 is_nova_s = data->is_nova_s; 226 } 227 228 /* Check if the adapter supports the needed features */ 229 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 230 return -EIO; 231 232 v4l_info(client, "chip found @ 0x%02x (%s)\n", 233 client->addr << 1, client->adapter->name); 234 235 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 236 if (state == NULL) 237 return -ENOMEM; 238 sd = &state->sd; 239 v4l2_i2c_subdev_init(sd, client, &wm8775_ops); 240 state->input = 2; 241 242 v4l2_ctrl_handler_init(&state->hdl, 4); 243 state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 244 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 245 state->vol = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 246 V4L2_CID_AUDIO_VOLUME, 0, 65535, (65535+99)/100, 0xCF00); /* 0dB*/ 247 state->bal = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 248 V4L2_CID_AUDIO_BALANCE, 0, 65535, (65535+99)/100, 32768); 249 state->loud = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 250 V4L2_CID_AUDIO_LOUDNESS, 0, 1, 1, 1); 251 sd->ctrl_handler = &state->hdl; 252 err = state->hdl.error; 253 if (err) { 254 v4l2_ctrl_handler_free(&state->hdl); 255 return err; 256 } 257 258 /* Initialize wm8775 */ 259 260 /* RESET */ 261 wm8775_write(sd, R23, 0x000); 262 /* Disable zero cross detect timeout */ 263 wm8775_write(sd, R7, 0x000); 264 /* HPF enable, left justified, 24-bit (Philips) mode */ 265 wm8775_write(sd, R11, 0x021); 266 /* Master mode, clock ratio 256fs */ 267 wm8775_write(sd, R12, 0x102); 268 /* Powered up */ 269 wm8775_write(sd, R13, 0x000); 270 271 if (!is_nova_s) { 272 /* ADC gain +2.5dB, enable zero cross */ 273 wm8775_write(sd, R14, 0x1d4); 274 /* ADC gain +2.5dB, enable zero cross */ 275 wm8775_write(sd, R15, 0x1d4); 276 /* ALC Stereo, ALC target level -1dB FS max gain +8dB */ 277 wm8775_write(sd, R16, 0x1bf); 278 /* Enable gain control, use zero cross detection, 279 ALC hold time 42.6 ms */ 280 wm8775_write(sd, R17, 0x185); 281 } else { 282 /* ALC stereo, ALC target level -5dB FS, ALC max gain +8dB */ 283 wm8775_write(sd, R16, 0x1bb); 284 /* Set ALC mode and hold time */ 285 wm8775_write(sd, R17, (state->loud->val ? ALC_EN : 0) | ALC_HOLD); 286 } 287 /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */ 288 wm8775_write(sd, R18, 0x0a2); 289 /* Enable noise gate, threshold -72dBfs */ 290 wm8775_write(sd, R19, 0x005); 291 if (!is_nova_s) { 292 /* Transient window 4ms, lower PGA gain limit -1dB */ 293 wm8775_write(sd, R20, 0x07a); 294 /* LRBOTH = 1, use input 2. */ 295 wm8775_write(sd, R21, 0x102); 296 } else { 297 /* Transient window 4ms, ALC min gain -5dB */ 298 wm8775_write(sd, R20, 0x0fb); 299 300 wm8775_set_audio(sd, 1); /* set volume/mute/mux */ 301 } 302 return 0; 303 } 304 305 static int wm8775_remove(struct i2c_client *client) 306 { 307 struct v4l2_subdev *sd = i2c_get_clientdata(client); 308 struct wm8775_state *state = to_state(sd); 309 310 v4l2_device_unregister_subdev(sd); 311 v4l2_ctrl_handler_free(&state->hdl); 312 return 0; 313 } 314 315 static const struct i2c_device_id wm8775_id[] = { 316 { "wm8775", 0 }, 317 { } 318 }; 319 MODULE_DEVICE_TABLE(i2c, wm8775_id); 320 321 static struct i2c_driver wm8775_driver = { 322 .driver = { 323 .owner = THIS_MODULE, 324 .name = "wm8775", 325 }, 326 .probe = wm8775_probe, 327 .remove = wm8775_remove, 328 .id_table = wm8775_id, 329 }; 330 331 module_i2c_driver(wm8775_driver); 332