1 /* 2 * wm8940.c -- WM8940 ALSA Soc Audio driver 3 * 4 * Author: Jonathan Cameron <jic23@cam.ac.uk> 5 * 6 * Based on wm8510.c 7 * Copyright 2006 Wolfson Microelectronics PLC. 8 * Author: Liam Girdwood <lrg@slimlogic.co.uk> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 * 14 * Not currently handled: 15 * Notch filter control 16 * AUXMode (inverting vs mixer) 17 * No means to obtain current gain if alc enabled. 18 * No use made of gpio 19 * Fast VMID discharge for power down 20 * Soft Start 21 * DLR and ALR Swaps not enabled 22 * Digital Sidetone not supported 23 */ 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <linux/kernel.h> 27 #include <linux/init.h> 28 #include <linux/delay.h> 29 #include <linux/pm.h> 30 #include <linux/i2c.h> 31 #include <linux/platform_device.h> 32 #include <linux/spi/spi.h> 33 #include <sound/core.h> 34 #include <sound/pcm.h> 35 #include <sound/pcm_params.h> 36 #include <sound/soc.h> 37 #include <sound/soc-dapm.h> 38 #include <sound/initval.h> 39 #include <sound/tlv.h> 40 41 #include "wm8940.h" 42 43 struct wm8940_priv { 44 unsigned int sysclk; 45 u16 reg_cache[WM8940_CACHEREGNUM]; 46 struct snd_soc_codec codec; 47 }; 48 49 static u16 wm8940_reg_defaults[] = { 50 0x8940, /* Soft Reset */ 51 0x0000, /* Power 1 */ 52 0x0000, /* Power 2 */ 53 0x0000, /* Power 3 */ 54 0x0010, /* Interface Control */ 55 0x0000, /* Companding Control */ 56 0x0140, /* Clock Control */ 57 0x0000, /* Additional Controls */ 58 0x0000, /* GPIO Control */ 59 0x0002, /* Auto Increment Control */ 60 0x0000, /* DAC Control */ 61 0x00FF, /* DAC Volume */ 62 0, 63 0, 64 0x0100, /* ADC Control */ 65 0x00FF, /* ADC Volume */ 66 0x0000, /* Notch Filter 1 Control 1 */ 67 0x0000, /* Notch Filter 1 Control 2 */ 68 0x0000, /* Notch Filter 2 Control 1 */ 69 0x0000, /* Notch Filter 2 Control 2 */ 70 0x0000, /* Notch Filter 3 Control 1 */ 71 0x0000, /* Notch Filter 3 Control 2 */ 72 0x0000, /* Notch Filter 4 Control 1 */ 73 0x0000, /* Notch Filter 4 Control 2 */ 74 0x0032, /* DAC Limit Control 1 */ 75 0x0000, /* DAC Limit Control 2 */ 76 0, 77 0, 78 0, 79 0, 80 0, 81 0, 82 0x0038, /* ALC Control 1 */ 83 0x000B, /* ALC Control 2 */ 84 0x0032, /* ALC Control 3 */ 85 0x0000, /* Noise Gate */ 86 0x0041, /* PLLN */ 87 0x000C, /* PLLK1 */ 88 0x0093, /* PLLK2 */ 89 0x00E9, /* PLLK3 */ 90 0, 91 0, 92 0x0030, /* ALC Control 4 */ 93 0, 94 0x0002, /* Input Control */ 95 0x0050, /* PGA Gain */ 96 0, 97 0x0002, /* ADC Boost Control */ 98 0, 99 0x0002, /* Output Control */ 100 0x0000, /* Speaker Mixer Control */ 101 0, 102 0, 103 0, 104 0x0079, /* Speaker Volume */ 105 0, 106 0x0000, /* Mono Mixer Control */ 107 }; 108 109 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" }; 110 static const struct soc_enum wm8940_adc_companding_enum 111 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding); 112 static const struct soc_enum wm8940_dac_companding_enum 113 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding); 114 115 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"}; 116 static const struct soc_enum wm8940_alc_mode_enum 117 = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text); 118 119 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"}; 120 static const struct soc_enum wm8940_mic_bias_level_enum 121 = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text); 122 123 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"}; 124 static const struct soc_enum wm8940_filter_mode_enum 125 = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text); 126 127 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1); 128 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0); 129 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0); 130 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0); 131 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0); 132 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0); 133 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0); 134 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0); 135 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1); 136 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0); 137 138 static const struct snd_kcontrol_new wm8940_snd_controls[] = { 139 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL, 140 6, 1, 0), 141 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum), 142 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum), 143 144 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum), 145 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0), 146 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1, 147 3, 7, 1, wm8940_alc_max_tlv), 148 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1, 149 0, 7, 0, wm8940_alc_min_tlv), 150 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2, 151 0, 14, 0, wm8940_alc_tar_tlv), 152 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0), 153 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0), 154 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0), 155 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0), 156 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE, 157 3, 1, 0), 158 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE, 159 0, 7, 0), 160 161 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0), 162 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0), 163 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0), 164 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2, 165 4, 9, 1, wm8940_lim_thresh_tlv), 166 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2, 167 0, 12, 0, wm8940_lim_boost_tlv), 168 169 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0), 170 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN, 171 0, 63, 0, wm8940_pga_vol_tlv), 172 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL, 173 0, 255, 0, wm8940_adc_tlv), 174 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL, 175 0, 255, 0, wm8940_adc_tlv), 176 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum), 177 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST, 178 8, 1, 0, wm8940_capture_boost_vol_tlv), 179 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL, 180 0, 63, 0, wm8940_spk_vol_tlv), 181 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1), 182 183 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL, 184 8, 1, 1, wm8940_att_tlv), 185 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0), 186 187 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1), 188 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX, 189 7, 1, 1, wm8940_att_tlv), 190 191 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0), 192 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum), 193 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0), 194 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0), 195 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0), 196 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0), 197 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0), 198 }; 199 200 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = { 201 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0), 202 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0), 203 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0), 204 }; 205 206 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = { 207 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0), 208 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0), 209 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0), 210 }; 211 212 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1); 213 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = { 214 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1), 215 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST, 216 0, 7, 0, wm8940_boost_vol_tlv), 217 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST, 218 4, 7, 0, wm8940_boost_vol_tlv), 219 }; 220 221 static const struct snd_kcontrol_new wm8940_micpga_controls[] = { 222 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0), 223 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0), 224 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0), 225 }; 226 227 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = { 228 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0, 229 &wm8940_speaker_mixer_controls[0], 230 ARRAY_SIZE(wm8940_speaker_mixer_controls)), 231 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0, 232 &wm8940_mono_mixer_controls[0], 233 ARRAY_SIZE(wm8940_mono_mixer_controls)), 234 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0), 235 236 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0), 237 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0), 238 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0), 239 SND_SOC_DAPM_OUTPUT("MONOOUT"), 240 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 241 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 242 243 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0), 244 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0), 245 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0, 246 &wm8940_micpga_controls[0], 247 ARRAY_SIZE(wm8940_micpga_controls)), 248 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0, 249 &wm8940_input_boost_controls[0], 250 ARRAY_SIZE(wm8940_input_boost_controls)), 251 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0), 252 253 SND_SOC_DAPM_INPUT("MICN"), 254 SND_SOC_DAPM_INPUT("MICP"), 255 SND_SOC_DAPM_INPUT("AUX"), 256 }; 257 258 static const struct snd_soc_dapm_route audio_map[] = { 259 /* Mono output mixer */ 260 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 261 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 262 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 263 264 /* Speaker output mixer */ 265 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 266 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 267 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 268 269 /* Outputs */ 270 {"Mono Out", NULL, "Mono Mixer"}, 271 {"MONOOUT", NULL, "Mono Out"}, 272 {"SpkN Out", NULL, "Speaker Mixer"}, 273 {"SpkP Out", NULL, "Speaker Mixer"}, 274 {"SPKOUTN", NULL, "SpkN Out"}, 275 {"SPKOUTP", NULL, "SpkP Out"}, 276 277 /* Microphone PGA */ 278 {"Mic PGA", "MICN Switch", "MICN"}, 279 {"Mic PGA", "MICP Switch", "MICP"}, 280 {"Mic PGA", "AUX Switch", "AUX"}, 281 282 /* Boost Mixer */ 283 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"}, 284 {"Boost Mixer", "Mic Volume", "MICP"}, 285 {"Boost Mixer", "Aux Volume", "Aux Input"}, 286 287 {"ADC", NULL, "Boost Mixer"}, 288 }; 289 290 static int wm8940_add_widgets(struct snd_soc_codec *codec) 291 { 292 int ret; 293 294 ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets, 295 ARRAY_SIZE(wm8940_dapm_widgets)); 296 if (ret) 297 goto error_ret; 298 ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 299 if (ret) 300 goto error_ret; 301 ret = snd_soc_dapm_new_widgets(codec); 302 303 error_ret: 304 return ret; 305 } 306 307 #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0); 308 309 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai, 310 unsigned int fmt) 311 { 312 struct snd_soc_codec *codec = codec_dai->codec; 313 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67; 314 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe; 315 316 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 317 case SND_SOC_DAIFMT_CBM_CFM: 318 clk |= 1; 319 break; 320 case SND_SOC_DAIFMT_CBS_CFS: 321 break; 322 default: 323 return -EINVAL; 324 } 325 snd_soc_write(codec, WM8940_CLOCK, clk); 326 327 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 328 case SND_SOC_DAIFMT_I2S: 329 iface |= (2 << 3); 330 break; 331 case SND_SOC_DAIFMT_LEFT_J: 332 iface |= (1 << 3); 333 break; 334 case SND_SOC_DAIFMT_RIGHT_J: 335 break; 336 case SND_SOC_DAIFMT_DSP_A: 337 iface |= (3 << 3); 338 break; 339 case SND_SOC_DAIFMT_DSP_B: 340 iface |= (3 << 3) | (1 << 7); 341 break; 342 } 343 344 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 345 case SND_SOC_DAIFMT_NB_NF: 346 break; 347 case SND_SOC_DAIFMT_NB_IF: 348 iface |= (1 << 7); 349 break; 350 case SND_SOC_DAIFMT_IB_NF: 351 iface |= (1 << 8); 352 break; 353 case SND_SOC_DAIFMT_IB_IF: 354 iface |= (1 << 8) | (1 << 7); 355 break; 356 } 357 358 snd_soc_write(codec, WM8940_IFACE, iface); 359 360 return 0; 361 } 362 363 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream, 364 struct snd_pcm_hw_params *params, 365 struct snd_soc_dai *dai) 366 { 367 struct snd_soc_pcm_runtime *rtd = substream->private_data; 368 struct snd_soc_device *socdev = rtd->socdev; 369 struct snd_soc_codec *codec = socdev->card->codec; 370 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F; 371 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1; 372 u16 companding = snd_soc_read(codec, 373 WM8940_COMPANDINGCTL) & 0xFFDF; 374 int ret; 375 376 /* LoutR control */ 377 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE 378 && params_channels(params) == 2) 379 iface |= (1 << 9); 380 381 switch (params_rate(params)) { 382 case SNDRV_PCM_RATE_8000: 383 addcntrl |= (0x5 << 1); 384 break; 385 case SNDRV_PCM_RATE_11025: 386 addcntrl |= (0x4 << 1); 387 break; 388 case SNDRV_PCM_RATE_16000: 389 addcntrl |= (0x3 << 1); 390 break; 391 case SNDRV_PCM_RATE_22050: 392 addcntrl |= (0x2 << 1); 393 break; 394 case SNDRV_PCM_RATE_32000: 395 addcntrl |= (0x1 << 1); 396 break; 397 case SNDRV_PCM_RATE_44100: 398 case SNDRV_PCM_RATE_48000: 399 break; 400 } 401 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl); 402 if (ret) 403 goto error_ret; 404 405 switch (params_format(params)) { 406 case SNDRV_PCM_FORMAT_S8: 407 companding = companding | (1 << 5); 408 break; 409 case SNDRV_PCM_FORMAT_S16_LE: 410 break; 411 case SNDRV_PCM_FORMAT_S20_3LE: 412 iface |= (1 << 5); 413 break; 414 case SNDRV_PCM_FORMAT_S24_LE: 415 iface |= (2 << 5); 416 break; 417 case SNDRV_PCM_FORMAT_S32_LE: 418 iface |= (3 << 5); 419 break; 420 } 421 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding); 422 if (ret) 423 goto error_ret; 424 ret = snd_soc_write(codec, WM8940_IFACE, iface); 425 426 error_ret: 427 return ret; 428 } 429 430 static int wm8940_mute(struct snd_soc_dai *dai, int mute) 431 { 432 struct snd_soc_codec *codec = dai->codec; 433 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf; 434 435 if (mute) 436 mute_reg |= 0x40; 437 438 return snd_soc_write(codec, WM8940_DAC, mute_reg); 439 } 440 441 static int wm8940_set_bias_level(struct snd_soc_codec *codec, 442 enum snd_soc_bias_level level) 443 { 444 u16 val; 445 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0; 446 int ret = 0; 447 448 switch (level) { 449 case SND_SOC_BIAS_ON: 450 /* ensure bufioen and biasen */ 451 pwr_reg |= (1 << 2) | (1 << 3); 452 /* Enable thermal shutdown */ 453 val = snd_soc_read(codec, WM8940_OUTPUTCTL); 454 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2); 455 if (ret) 456 break; 457 /* set vmid to 75k */ 458 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1); 459 break; 460 case SND_SOC_BIAS_PREPARE: 461 /* ensure bufioen and biasen */ 462 pwr_reg |= (1 << 2) | (1 << 3); 463 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1); 464 break; 465 case SND_SOC_BIAS_STANDBY: 466 /* ensure bufioen and biasen */ 467 pwr_reg |= (1 << 2) | (1 << 3); 468 /* set vmid to 300k for standby */ 469 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2); 470 break; 471 case SND_SOC_BIAS_OFF: 472 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg); 473 break; 474 } 475 476 return ret; 477 } 478 479 struct pll_ { 480 unsigned int pre_scale:2; 481 unsigned int n:4; 482 unsigned int k; 483 }; 484 485 static struct pll_ pll_div; 486 487 /* The size in bits of the pll divide multiplied by 10 488 * to allow rounding later */ 489 #define FIXED_PLL_SIZE ((1 << 24) * 10) 490 static void pll_factors(unsigned int target, unsigned int source) 491 { 492 unsigned long long Kpart; 493 unsigned int K, Ndiv, Nmod; 494 /* The left shift ist to avoid accuracy loss when right shifting */ 495 Ndiv = target / source; 496 497 if (Ndiv > 12) { 498 source <<= 1; 499 /* Multiply by 2 */ 500 pll_div.pre_scale = 0; 501 Ndiv = target / source; 502 } else if (Ndiv < 3) { 503 source >>= 2; 504 /* Divide by 4 */ 505 pll_div.pre_scale = 3; 506 Ndiv = target / source; 507 } else if (Ndiv < 6) { 508 source >>= 1; 509 /* divide by 2 */ 510 pll_div.pre_scale = 2; 511 Ndiv = target / source; 512 } else 513 pll_div.pre_scale = 1; 514 515 if ((Ndiv < 6) || (Ndiv > 12)) 516 printk(KERN_WARNING 517 "WM8940 N value %d outwith recommended range!d\n", 518 Ndiv); 519 520 pll_div.n = Ndiv; 521 Nmod = target % source; 522 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 523 524 do_div(Kpart, source); 525 526 K = Kpart & 0xFFFFFFFF; 527 528 /* Check if we need to round */ 529 if ((K % 10) >= 5) 530 K += 5; 531 532 /* Move down to proper range now rounding is done */ 533 K /= 10; 534 535 pll_div.k = K; 536 } 537 538 /* Untested at the moment */ 539 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, 540 int pll_id, unsigned int freq_in, unsigned int freq_out) 541 { 542 struct snd_soc_codec *codec = codec_dai->codec; 543 u16 reg; 544 545 /* Turn off PLL */ 546 reg = snd_soc_read(codec, WM8940_POWER1); 547 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df); 548 549 if (freq_in == 0 || freq_out == 0) { 550 /* Clock CODEC directly from MCLK */ 551 reg = snd_soc_read(codec, WM8940_CLOCK); 552 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff); 553 /* Pll power down */ 554 snd_soc_write(codec, WM8940_PLLN, (1 << 7)); 555 return 0; 556 } 557 558 /* Pll is followed by a frequency divide by 4 */ 559 pll_factors(freq_out*4, freq_in); 560 if (pll_div.k) 561 snd_soc_write(codec, WM8940_PLLN, 562 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6)); 563 else /* No factional component */ 564 snd_soc_write(codec, WM8940_PLLN, 565 (pll_div.pre_scale << 4) | pll_div.n); 566 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18); 567 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff); 568 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff); 569 /* Enable the PLL */ 570 reg = snd_soc_read(codec, WM8940_POWER1); 571 snd_soc_write(codec, WM8940_POWER1, reg | 0x020); 572 573 /* Run CODEC from PLL instead of MCLK */ 574 reg = snd_soc_read(codec, WM8940_CLOCK); 575 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100); 576 577 return 0; 578 } 579 580 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai, 581 int clk_id, unsigned int freq, int dir) 582 { 583 struct snd_soc_codec *codec = codec_dai->codec; 584 struct wm8940_priv *wm8940 = codec->private_data; 585 586 switch (freq) { 587 case 11289600: 588 case 12000000: 589 case 12288000: 590 case 16934400: 591 case 18432000: 592 wm8940->sysclk = freq; 593 return 0; 594 } 595 return -EINVAL; 596 } 597 598 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 599 int div_id, int div) 600 { 601 struct snd_soc_codec *codec = codec_dai->codec; 602 u16 reg; 603 int ret = 0; 604 605 switch (div_id) { 606 case WM8940_BCLKDIV: 607 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3; 608 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2)); 609 break; 610 case WM8940_MCLKDIV: 611 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F; 612 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5)); 613 break; 614 case WM8940_OPCLKDIV: 615 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF; 616 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4)); 617 break; 618 } 619 return ret; 620 } 621 622 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000 623 624 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ 625 SNDRV_PCM_FMTBIT_S16_LE | \ 626 SNDRV_PCM_FMTBIT_S20_3LE | \ 627 SNDRV_PCM_FMTBIT_S24_LE | \ 628 SNDRV_PCM_FMTBIT_S32_LE) 629 630 static struct snd_soc_dai_ops wm8940_dai_ops = { 631 .hw_params = wm8940_i2s_hw_params, 632 .set_sysclk = wm8940_set_dai_sysclk, 633 .digital_mute = wm8940_mute, 634 .set_fmt = wm8940_set_dai_fmt, 635 .set_clkdiv = wm8940_set_dai_clkdiv, 636 .set_pll = wm8940_set_dai_pll, 637 }; 638 639 struct snd_soc_dai wm8940_dai = { 640 .name = "WM8940", 641 .playback = { 642 .stream_name = "Playback", 643 .channels_min = 1, 644 .channels_max = 2, 645 .rates = WM8940_RATES, 646 .formats = WM8940_FORMATS, 647 }, 648 .capture = { 649 .stream_name = "Capture", 650 .channels_min = 1, 651 .channels_max = 2, 652 .rates = WM8940_RATES, 653 .formats = WM8940_FORMATS, 654 }, 655 .ops = &wm8940_dai_ops, 656 .symmetric_rates = 1, 657 }; 658 EXPORT_SYMBOL_GPL(wm8940_dai); 659 660 static int wm8940_suspend(struct platform_device *pdev, pm_message_t state) 661 { 662 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 663 struct snd_soc_codec *codec = socdev->card->codec; 664 665 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); 666 } 667 668 static int wm8940_resume(struct platform_device *pdev) 669 { 670 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 671 struct snd_soc_codec *codec = socdev->card->codec; 672 int i; 673 int ret; 674 u8 data[3]; 675 u16 *cache = codec->reg_cache; 676 677 /* Sync reg_cache with the hardware 678 * Could use auto incremented writes to speed this up 679 */ 680 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) { 681 data[0] = i; 682 data[1] = (cache[i] & 0xFF00) >> 8; 683 data[2] = cache[i] & 0x00FF; 684 ret = codec->hw_write(codec->control_data, data, 3); 685 if (ret < 0) 686 goto error_ret; 687 else if (ret != 3) { 688 ret = -EIO; 689 goto error_ret; 690 } 691 } 692 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 693 if (ret) 694 goto error_ret; 695 ret = wm8940_set_bias_level(codec, codec->suspend_bias_level); 696 697 error_ret: 698 return ret; 699 } 700 701 static struct snd_soc_codec *wm8940_codec; 702 703 static int wm8940_probe(struct platform_device *pdev) 704 { 705 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 706 struct snd_soc_codec *codec; 707 708 int ret = 0; 709 710 if (wm8940_codec == NULL) { 711 dev_err(&pdev->dev, "Codec device not registered\n"); 712 return -ENODEV; 713 } 714 715 socdev->card->codec = wm8940_codec; 716 codec = wm8940_codec; 717 718 mutex_init(&codec->mutex); 719 /* register pcms */ 720 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 721 if (ret < 0) { 722 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 723 goto pcm_err; 724 } 725 726 ret = snd_soc_add_controls(codec, wm8940_snd_controls, 727 ARRAY_SIZE(wm8940_snd_controls)); 728 if (ret) 729 goto error_free_pcms; 730 ret = wm8940_add_widgets(codec); 731 if (ret) 732 goto error_free_pcms; 733 734 ret = snd_soc_init_card(socdev); 735 if (ret < 0) { 736 dev_err(codec->dev, "failed to register card: %d\n", ret); 737 goto error_free_pcms; 738 } 739 740 return ret; 741 742 error_free_pcms: 743 snd_soc_free_pcms(socdev); 744 snd_soc_dapm_free(socdev); 745 pcm_err: 746 return ret; 747 } 748 749 static int wm8940_remove(struct platform_device *pdev) 750 { 751 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 752 753 snd_soc_free_pcms(socdev); 754 snd_soc_dapm_free(socdev); 755 756 return 0; 757 } 758 759 struct snd_soc_codec_device soc_codec_dev_wm8940 = { 760 .probe = wm8940_probe, 761 .remove = wm8940_remove, 762 .suspend = wm8940_suspend, 763 .resume = wm8940_resume, 764 }; 765 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940); 766 767 static int wm8940_register(struct wm8940_priv *wm8940, 768 enum snd_soc_control_type control) 769 { 770 struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data; 771 struct snd_soc_codec *codec = &wm8940->codec; 772 int ret; 773 u16 reg; 774 if (wm8940_codec) { 775 dev_err(codec->dev, "Another WM8940 is registered\n"); 776 return -EINVAL; 777 } 778 779 INIT_LIST_HEAD(&codec->dapm_widgets); 780 INIT_LIST_HEAD(&codec->dapm_paths); 781 782 codec->private_data = wm8940; 783 codec->name = "WM8940"; 784 codec->owner = THIS_MODULE; 785 codec->bias_level = SND_SOC_BIAS_OFF; 786 codec->set_bias_level = wm8940_set_bias_level; 787 codec->dai = &wm8940_dai; 788 codec->num_dai = 1; 789 codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults); 790 codec->reg_cache = &wm8940->reg_cache; 791 792 ret = snd_soc_codec_set_cache_io(codec, 8, 16, control); 793 if (ret < 0) { 794 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 795 return ret; 796 } 797 798 memcpy(codec->reg_cache, wm8940_reg_defaults, 799 sizeof(wm8940_reg_defaults)); 800 801 ret = wm8940_reset(codec); 802 if (ret < 0) { 803 dev_err(codec->dev, "Failed to issue reset\n"); 804 return ret; 805 } 806 807 wm8940_dai.dev = codec->dev; 808 809 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 810 811 ret = snd_soc_write(codec, WM8940_POWER1, 0x180); 812 if (ret < 0) 813 return ret; 814 815 if (!pdata) 816 dev_warn(codec->dev, "No platform data supplied\n"); 817 else { 818 reg = snd_soc_read(codec, WM8940_OUTPUTCTL); 819 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi); 820 if (ret < 0) 821 return ret; 822 } 823 824 825 wm8940_codec = codec; 826 827 ret = snd_soc_register_codec(codec); 828 if (ret) { 829 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 830 return ret; 831 } 832 833 ret = snd_soc_register_dai(&wm8940_dai); 834 if (ret) { 835 dev_err(codec->dev, "Failed to register DAI: %d\n", ret); 836 snd_soc_unregister_codec(codec); 837 return ret; 838 } 839 840 return 0; 841 } 842 843 static void wm8940_unregister(struct wm8940_priv *wm8940) 844 { 845 wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF); 846 snd_soc_unregister_dai(&wm8940_dai); 847 snd_soc_unregister_codec(&wm8940->codec); 848 kfree(wm8940); 849 wm8940_codec = NULL; 850 } 851 852 static int wm8940_i2c_probe(struct i2c_client *i2c, 853 const struct i2c_device_id *id) 854 { 855 struct wm8940_priv *wm8940; 856 struct snd_soc_codec *codec; 857 858 wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL); 859 if (wm8940 == NULL) 860 return -ENOMEM; 861 862 codec = &wm8940->codec; 863 codec->hw_write = (hw_write_t)i2c_master_send; 864 i2c_set_clientdata(i2c, wm8940); 865 codec->control_data = i2c; 866 codec->dev = &i2c->dev; 867 868 return wm8940_register(wm8940, SND_SOC_I2C); 869 } 870 871 static int __devexit wm8940_i2c_remove(struct i2c_client *client) 872 { 873 struct wm8940_priv *wm8940 = i2c_get_clientdata(client); 874 875 wm8940_unregister(wm8940); 876 877 return 0; 878 } 879 880 #ifdef CONFIG_PM 881 static int wm8940_i2c_suspend(struct i2c_client *client, pm_message_t msg) 882 { 883 return snd_soc_suspend_device(&client->dev); 884 } 885 886 static int wm8940_i2c_resume(struct i2c_client *client) 887 { 888 return snd_soc_resume_device(&client->dev); 889 } 890 #else 891 #define wm8940_i2c_suspend NULL 892 #define wm8940_i2c_resume NULL 893 #endif 894 895 static const struct i2c_device_id wm8940_i2c_id[] = { 896 { "wm8940", 0 }, 897 { } 898 }; 899 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id); 900 901 static struct i2c_driver wm8940_i2c_driver = { 902 .driver = { 903 .name = "WM8940 I2C Codec", 904 .owner = THIS_MODULE, 905 }, 906 .probe = wm8940_i2c_probe, 907 .remove = __devexit_p(wm8940_i2c_remove), 908 .suspend = wm8940_i2c_suspend, 909 .resume = wm8940_i2c_resume, 910 .id_table = wm8940_i2c_id, 911 }; 912 913 static int __init wm8940_modinit(void) 914 { 915 int ret; 916 917 ret = i2c_add_driver(&wm8940_i2c_driver); 918 if (ret) 919 printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n", 920 ret); 921 return ret; 922 } 923 module_init(wm8940_modinit); 924 925 static void __exit wm8940_exit(void) 926 { 927 i2c_del_driver(&wm8940_i2c_driver); 928 } 929 module_exit(wm8940_exit); 930 931 MODULE_DESCRIPTION("ASoC WM8940 driver"); 932 MODULE_AUTHOR("Jonathan Cameron"); 933 MODULE_LICENSE("GPL"); 934