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 <linux/slab.h> 34#include <sound/core.h> 35#include <sound/pcm.h> 36#include <sound/pcm_params.h> 37#include <sound/soc.h> 38#include <sound/soc-dapm.h> 39#include <sound/initval.h> 40#include <sound/tlv.h> 41 42#include "wm8940.h" 43 44struct wm8940_priv { 45 unsigned int sysclk; 46 u16 reg_cache[WM8940_CACHEREGNUM]; 47 struct snd_soc_codec codec; 48}; 49 50static u16 wm8940_reg_defaults[] = { 51 0x8940, /* Soft Reset */ 52 0x0000, /* Power 1 */ 53 0x0000, /* Power 2 */ 54 0x0000, /* Power 3 */ 55 0x0010, /* Interface Control */ 56 0x0000, /* Companding Control */ 57 0x0140, /* Clock Control */ 58 0x0000, /* Additional Controls */ 59 0x0000, /* GPIO Control */ 60 0x0002, /* Auto Increment Control */ 61 0x0000, /* DAC Control */ 62 0x00FF, /* DAC Volume */ 63 0, 64 0, 65 0x0100, /* ADC Control */ 66 0x00FF, /* ADC Volume */ 67 0x0000, /* Notch Filter 1 Control 1 */ 68 0x0000, /* Notch Filter 1 Control 2 */ 69 0x0000, /* Notch Filter 2 Control 1 */ 70 0x0000, /* Notch Filter 2 Control 2 */ 71 0x0000, /* Notch Filter 3 Control 1 */ 72 0x0000, /* Notch Filter 3 Control 2 */ 73 0x0000, /* Notch Filter 4 Control 1 */ 74 0x0000, /* Notch Filter 4 Control 2 */ 75 0x0032, /* DAC Limit Control 1 */ 76 0x0000, /* DAC Limit Control 2 */ 77 0, 78 0, 79 0, 80 0, 81 0, 82 0, 83 0x0038, /* ALC Control 1 */ 84 0x000B, /* ALC Control 2 */ 85 0x0032, /* ALC Control 3 */ 86 0x0000, /* Noise Gate */ 87 0x0041, /* PLLN */ 88 0x000C, /* PLLK1 */ 89 0x0093, /* PLLK2 */ 90 0x00E9, /* PLLK3 */ 91 0, 92 0, 93 0x0030, /* ALC Control 4 */ 94 0, 95 0x0002, /* Input Control */ 96 0x0050, /* PGA Gain */ 97 0, 98 0x0002, /* ADC Boost Control */ 99 0, 100 0x0002, /* Output Control */ 101 0x0000, /* Speaker Mixer Control */ 102 0, 103 0, 104 0, 105 0x0079, /* Speaker Volume */ 106 0, 107 0x0000, /* Mono Mixer Control */ 108}; 109 110static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" }; 111static const struct soc_enum wm8940_adc_companding_enum 112= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding); 113static const struct soc_enum wm8940_dac_companding_enum 114= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding); 115 116static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"}; 117static const struct soc_enum wm8940_alc_mode_enum 118= SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text); 119 120static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"}; 121static const struct soc_enum wm8940_mic_bias_level_enum 122= SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text); 123 124static const char *wm8940_filter_mode_text[] = {"Audio", "Application"}; 125static const struct soc_enum wm8940_filter_mode_enum 126= SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text); 127 128static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1); 129static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0); 130static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0); 131static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0); 132static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0); 133static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0); 134static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0); 135static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0); 136static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1); 137static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0); 138 139static const struct snd_kcontrol_new wm8940_snd_controls[] = { 140 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL, 141 6, 1, 0), 142 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum), 143 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum), 144 145 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum), 146 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0), 147 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1, 148 3, 7, 1, wm8940_alc_max_tlv), 149 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1, 150 0, 7, 0, wm8940_alc_min_tlv), 151 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2, 152 0, 14, 0, wm8940_alc_tar_tlv), 153 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0), 154 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0), 155 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0), 156 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0), 157 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE, 158 3, 1, 0), 159 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE, 160 0, 7, 0), 161 162 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0), 163 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0), 164 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0), 165 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2, 166 4, 9, 1, wm8940_lim_thresh_tlv), 167 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2, 168 0, 12, 0, wm8940_lim_boost_tlv), 169 170 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0), 171 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN, 172 0, 63, 0, wm8940_pga_vol_tlv), 173 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL, 174 0, 255, 0, wm8940_adc_tlv), 175 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL, 176 0, 255, 0, wm8940_adc_tlv), 177 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum), 178 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST, 179 8, 1, 0, wm8940_capture_boost_vol_tlv), 180 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL, 181 0, 63, 0, wm8940_spk_vol_tlv), 182 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1), 183 184 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL, 185 8, 1, 1, wm8940_att_tlv), 186 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0), 187 188 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1), 189 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX, 190 7, 1, 1, wm8940_att_tlv), 191 192 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0), 193 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum), 194 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0), 195 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0), 196 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0), 197 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0), 198 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0), 199}; 200 201static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = { 202 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0), 203 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0), 204 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0), 205}; 206 207static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = { 208 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0), 209 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0), 210 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0), 211}; 212 213static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1); 214static const struct snd_kcontrol_new wm8940_input_boost_controls[] = { 215 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1), 216 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST, 217 0, 7, 0, wm8940_boost_vol_tlv), 218 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST, 219 4, 7, 0, wm8940_boost_vol_tlv), 220}; 221 222static const struct snd_kcontrol_new wm8940_micpga_controls[] = { 223 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0), 224 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0), 225 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0), 226}; 227 228static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = { 229 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0, 230 &wm8940_speaker_mixer_controls[0], 231 ARRAY_SIZE(wm8940_speaker_mixer_controls)), 232 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0, 233 &wm8940_mono_mixer_controls[0], 234 ARRAY_SIZE(wm8940_mono_mixer_controls)), 235 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0), 236 237 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0), 238 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0), 239 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0), 240 SND_SOC_DAPM_OUTPUT("MONOOUT"), 241 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 242 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 243 244 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0), 245 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0), 246 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0, 247 &wm8940_micpga_controls[0], 248 ARRAY_SIZE(wm8940_micpga_controls)), 249 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0, 250 &wm8940_input_boost_controls[0], 251 ARRAY_SIZE(wm8940_input_boost_controls)), 252 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0), 253 254 SND_SOC_DAPM_INPUT("MICN"), 255 SND_SOC_DAPM_INPUT("MICP"), 256 SND_SOC_DAPM_INPUT("AUX"), 257}; 258 259static const struct snd_soc_dapm_route audio_map[] = { 260 /* Mono output mixer */ 261 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 262 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 263 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 264 265 /* Speaker output mixer */ 266 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 267 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 268 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 269 270 /* Outputs */ 271 {"Mono Out", NULL, "Mono Mixer"}, 272 {"MONOOUT", NULL, "Mono Out"}, 273 {"SpkN Out", NULL, "Speaker Mixer"}, 274 {"SpkP Out", NULL, "Speaker Mixer"}, 275 {"SPKOUTN", NULL, "SpkN Out"}, 276 {"SPKOUTP", NULL, "SpkP Out"}, 277 278 /* Microphone PGA */ 279 {"Mic PGA", "MICN Switch", "MICN"}, 280 {"Mic PGA", "MICP Switch", "MICP"}, 281 {"Mic PGA", "AUX Switch", "AUX"}, 282 283 /* Boost Mixer */ 284 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"}, 285 {"Boost Mixer", "Mic Volume", "MICP"}, 286 {"Boost Mixer", "Aux Volume", "Aux Input"}, 287 288 {"ADC", NULL, "Boost Mixer"}, 289}; 290 291static int wm8940_add_widgets(struct snd_soc_codec *codec) 292{ 293 int ret; 294 295 ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets, 296 ARRAY_SIZE(wm8940_dapm_widgets)); 297 if (ret) 298 goto error_ret; 299 ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 300 if (ret) 301 goto error_ret; 302 303error_ret: 304 return ret; 305} 306 307#define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0); 308 309static 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 363static 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 8000: 383 addcntrl |= (0x5 << 1); 384 break; 385 case 11025: 386 addcntrl |= (0x4 << 1); 387 break; 388 case 16000: 389 addcntrl |= (0x3 << 1); 390 break; 391 case 22050: 392 addcntrl |= (0x2 << 1); 393 break; 394 case 32000: 395 addcntrl |= (0x1 << 1); 396 break; 397 case 44100: 398 case 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 426error_ret: 427 return ret; 428} 429 430static 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 441static 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 479struct pll_ { 480 unsigned int pre_scale:2; 481 unsigned int n:4; 482 unsigned int k; 483}; 484 485static 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) 490static 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 */ 539static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 540 int source, 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 580static 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 = snd_soc_codec_get_drvdata(codec); 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 598static 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 630static 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 639struct 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}; 658EXPORT_SYMBOL_GPL(wm8940_dai); 659 660static 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 668static 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 696error_ret: 697 return ret; 698} 699 700static struct snd_soc_codec *wm8940_codec; 701 702static int wm8940_probe(struct platform_device *pdev) 703{ 704 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 705 struct snd_soc_codec *codec; 706 707 int ret = 0; 708 709 if (wm8940_codec == NULL) { 710 dev_err(&pdev->dev, "Codec device not registered\n"); 711 return -ENODEV; 712 } 713 714 socdev->card->codec = wm8940_codec; 715 codec = wm8940_codec; 716 717 mutex_init(&codec->mutex); 718 /* register pcms */ 719 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 720 if (ret < 0) { 721 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 722 goto pcm_err; 723 } 724 725 ret = snd_soc_add_controls(codec, wm8940_snd_controls, 726 ARRAY_SIZE(wm8940_snd_controls)); 727 if (ret) 728 goto error_free_pcms; 729 ret = wm8940_add_widgets(codec); 730 if (ret) 731 goto error_free_pcms; 732 733 return ret; 734 735error_free_pcms: 736 snd_soc_free_pcms(socdev); 737 snd_soc_dapm_free(socdev); 738pcm_err: 739 return ret; 740} 741 742static int wm8940_remove(struct platform_device *pdev) 743{ 744 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 745 746 snd_soc_free_pcms(socdev); 747 snd_soc_dapm_free(socdev); 748 749 return 0; 750} 751 752struct snd_soc_codec_device soc_codec_dev_wm8940 = { 753 .probe = wm8940_probe, 754 .remove = wm8940_remove, 755 .suspend = wm8940_suspend, 756 .resume = wm8940_resume, 757}; 758EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940); 759 760static int wm8940_register(struct wm8940_priv *wm8940, 761 enum snd_soc_control_type control) 762{ 763 struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data; 764 struct snd_soc_codec *codec = &wm8940->codec; 765 int ret; 766 u16 reg; 767 if (wm8940_codec) { 768 dev_err(codec->dev, "Another WM8940 is registered\n"); 769 return -EINVAL; 770 } 771 772 INIT_LIST_HEAD(&codec->dapm_widgets); 773 INIT_LIST_HEAD(&codec->dapm_paths); 774 775 snd_soc_codec_set_drvdata(codec, wm8940); 776 codec->name = "WM8940"; 777 codec->owner = THIS_MODULE; 778 codec->bias_level = SND_SOC_BIAS_OFF; 779 codec->set_bias_level = wm8940_set_bias_level; 780 codec->dai = &wm8940_dai; 781 codec->num_dai = 1; 782 codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults); 783 codec->reg_cache = &wm8940->reg_cache; 784 785 ret = snd_soc_codec_set_cache_io(codec, 8, 16, control); 786 if (ret < 0) { 787 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 788 return ret; 789 } 790 791 memcpy(codec->reg_cache, wm8940_reg_defaults, 792 sizeof(wm8940_reg_defaults)); 793 794 ret = wm8940_reset(codec); 795 if (ret < 0) { 796 dev_err(codec->dev, "Failed to issue reset\n"); 797 return ret; 798 } 799 800 wm8940_dai.dev = codec->dev; 801 802 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 803 804 ret = snd_soc_write(codec, WM8940_POWER1, 0x180); 805 if (ret < 0) 806 return ret; 807 808 if (!pdata) 809 dev_warn(codec->dev, "No platform data supplied\n"); 810 else { 811 reg = snd_soc_read(codec, WM8940_OUTPUTCTL); 812 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi); 813 if (ret < 0) 814 return ret; 815 } 816 817 818 wm8940_codec = codec; 819 820 ret = snd_soc_register_codec(codec); 821 if (ret) { 822 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 823 return ret; 824 } 825 826 ret = snd_soc_register_dai(&wm8940_dai); 827 if (ret) { 828 dev_err(codec->dev, "Failed to register DAI: %d\n", ret); 829 snd_soc_unregister_codec(codec); 830 return ret; 831 } 832 833 return 0; 834} 835 836static void wm8940_unregister(struct wm8940_priv *wm8940) 837{ 838 wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF); 839 snd_soc_unregister_dai(&wm8940_dai); 840 snd_soc_unregister_codec(&wm8940->codec); 841 kfree(wm8940); 842 wm8940_codec = NULL; 843} 844 845static int wm8940_i2c_probe(struct i2c_client *i2c, 846 const struct i2c_device_id *id) 847{ 848 int ret; 849 struct wm8940_priv *wm8940; 850 struct snd_soc_codec *codec; 851 852 wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL); 853 if (wm8940 == NULL) 854 return -ENOMEM; 855 856 codec = &wm8940->codec; 857 codec->hw_write = (hw_write_t)i2c_master_send; 858 i2c_set_clientdata(i2c, wm8940); 859 codec->control_data = i2c; 860 codec->dev = &i2c->dev; 861 862 ret = wm8940_register(wm8940, SND_SOC_I2C); 863 if (ret < 0) 864 kfree(wm8940); 865 866 return ret; 867} 868 869static int __devexit wm8940_i2c_remove(struct i2c_client *client) 870{ 871 struct wm8940_priv *wm8940 = i2c_get_clientdata(client); 872 873 wm8940_unregister(wm8940); 874 875 return 0; 876} 877 878static const struct i2c_device_id wm8940_i2c_id[] = { 879 { "wm8940", 0 }, 880 { } 881}; 882MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id); 883 884static struct i2c_driver wm8940_i2c_driver = { 885 .driver = { 886 .name = "WM8940 I2C Codec", 887 .owner = THIS_MODULE, 888 }, 889 .probe = wm8940_i2c_probe, 890 .remove = __devexit_p(wm8940_i2c_remove), 891 .id_table = wm8940_i2c_id, 892}; 893 894static int __init wm8940_modinit(void) 895{ 896 int ret; 897 898 ret = i2c_add_driver(&wm8940_i2c_driver); 899 if (ret) 900 printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n", 901 ret); 902 return ret; 903} 904module_init(wm8940_modinit); 905 906static void __exit wm8940_exit(void) 907{ 908 i2c_del_driver(&wm8940_i2c_driver); 909} 910module_exit(wm8940_exit); 911 912MODULE_DESCRIPTION("ASoC WM8940 driver"); 913MODULE_AUTHOR("Jonathan Cameron"); 914MODULE_LICENSE("GPL"); 915