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/initval.h> 39#include <sound/tlv.h> 40 41#include "wm8940.h" 42 43struct wm8940_priv { 44 unsigned int sysclk; 45 enum snd_soc_control_type control_type; 46 void *control_data; 47}; 48 49static 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 109static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" }; 110static const struct soc_enum wm8940_adc_companding_enum 111= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding); 112static const struct soc_enum wm8940_dac_companding_enum 113= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding); 114 115static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"}; 116static const struct soc_enum wm8940_alc_mode_enum 117= SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text); 118 119static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"}; 120static const struct soc_enum wm8940_mic_bias_level_enum 121= SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text); 122 123static const char *wm8940_filter_mode_text[] = {"Audio", "Application"}; 124static const struct soc_enum wm8940_filter_mode_enum 125= SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text); 126 127static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1); 128static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0); 129static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0); 130static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0); 131static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0); 132static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0); 133static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0); 134static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0); 135static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1); 136static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0); 137 138static 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 200static 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 206static 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 212static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1); 213static 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 221static 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 227static 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 258static 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 290static int wm8940_add_widgets(struct snd_soc_codec *codec) 291{ 292 struct snd_soc_dapm_context *dapm = &codec->dapm; 293 int ret; 294 295 ret = snd_soc_dapm_new_controls(dapm, wm8940_dapm_widgets, 296 ARRAY_SIZE(wm8940_dapm_widgets)); 297 if (ret) 298 goto error_ret; 299 ret = snd_soc_dapm_add_routes(dapm, 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_codec *codec = rtd->codec; 369 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F; 370 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1; 371 u16 companding = snd_soc_read(codec, 372 WM8940_COMPANDINGCTL) & 0xFFDF; 373 int ret; 374 375 /* LoutR control */ 376 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE 377 && params_channels(params) == 2) 378 iface |= (1 << 9); 379 380 switch (params_rate(params)) { 381 case 8000: 382 addcntrl |= (0x5 << 1); 383 break; 384 case 11025: 385 addcntrl |= (0x4 << 1); 386 break; 387 case 16000: 388 addcntrl |= (0x3 << 1); 389 break; 390 case 22050: 391 addcntrl |= (0x2 << 1); 392 break; 393 case 32000: 394 addcntrl |= (0x1 << 1); 395 break; 396 case 44100: 397 case 48000: 398 break; 399 } 400 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl); 401 if (ret) 402 goto error_ret; 403 404 switch (params_format(params)) { 405 case SNDRV_PCM_FORMAT_S8: 406 companding = companding | (1 << 5); 407 break; 408 case SNDRV_PCM_FORMAT_S16_LE: 409 break; 410 case SNDRV_PCM_FORMAT_S20_3LE: 411 iface |= (1 << 5); 412 break; 413 case SNDRV_PCM_FORMAT_S24_LE: 414 iface |= (2 << 5); 415 break; 416 case SNDRV_PCM_FORMAT_S32_LE: 417 iface |= (3 << 5); 418 break; 419 } 420 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding); 421 if (ret) 422 goto error_ret; 423 ret = snd_soc_write(codec, WM8940_IFACE, iface); 424 425error_ret: 426 return ret; 427} 428 429static int wm8940_mute(struct snd_soc_dai *dai, int mute) 430{ 431 struct snd_soc_codec *codec = dai->codec; 432 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf; 433 434 if (mute) 435 mute_reg |= 0x40; 436 437 return snd_soc_write(codec, WM8940_DAC, mute_reg); 438} 439 440static int wm8940_set_bias_level(struct snd_soc_codec *codec, 441 enum snd_soc_bias_level level) 442{ 443 u16 val; 444 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0; 445 int ret = 0; 446 447 switch (level) { 448 case SND_SOC_BIAS_ON: 449 /* ensure bufioen and biasen */ 450 pwr_reg |= (1 << 2) | (1 << 3); 451 /* Enable thermal shutdown */ 452 val = snd_soc_read(codec, WM8940_OUTPUTCTL); 453 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2); 454 if (ret) 455 break; 456 /* set vmid to 75k */ 457 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1); 458 break; 459 case SND_SOC_BIAS_PREPARE: 460 /* ensure bufioen and biasen */ 461 pwr_reg |= (1 << 2) | (1 << 3); 462 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1); 463 break; 464 case SND_SOC_BIAS_STANDBY: 465 /* ensure bufioen and biasen */ 466 pwr_reg |= (1 << 2) | (1 << 3); 467 /* set vmid to 300k for standby */ 468 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2); 469 break; 470 case SND_SOC_BIAS_OFF: 471 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg); 472 break; 473 } 474 475 codec->dapm.bias_level = level; 476 477 return ret; 478} 479 480struct pll_ { 481 unsigned int pre_scale:2; 482 unsigned int n:4; 483 unsigned int k; 484}; 485 486static struct pll_ pll_div; 487 488/* The size in bits of the pll divide multiplied by 10 489 * to allow rounding later */ 490#define FIXED_PLL_SIZE ((1 << 24) * 10) 491static void pll_factors(unsigned int target, unsigned int source) 492{ 493 unsigned long long Kpart; 494 unsigned int K, Ndiv, Nmod; 495 /* The left shift ist to avoid accuracy loss when right shifting */ 496 Ndiv = target / source; 497 498 if (Ndiv > 12) { 499 source <<= 1; 500 /* Multiply by 2 */ 501 pll_div.pre_scale = 0; 502 Ndiv = target / source; 503 } else if (Ndiv < 3) { 504 source >>= 2; 505 /* Divide by 4 */ 506 pll_div.pre_scale = 3; 507 Ndiv = target / source; 508 } else if (Ndiv < 6) { 509 source >>= 1; 510 /* divide by 2 */ 511 pll_div.pre_scale = 2; 512 Ndiv = target / source; 513 } else 514 pll_div.pre_scale = 1; 515 516 if ((Ndiv < 6) || (Ndiv > 12)) 517 printk(KERN_WARNING 518 "WM8940 N value %d outwith recommended range!d\n", 519 Ndiv); 520 521 pll_div.n = Ndiv; 522 Nmod = target % source; 523 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 524 525 do_div(Kpart, source); 526 527 K = Kpart & 0xFFFFFFFF; 528 529 /* Check if we need to round */ 530 if ((K % 10) >= 5) 531 K += 5; 532 533 /* Move down to proper range now rounding is done */ 534 K /= 10; 535 536 pll_div.k = K; 537} 538 539/* Untested at the moment */ 540static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 541 int source, unsigned int freq_in, unsigned int freq_out) 542{ 543 struct snd_soc_codec *codec = codec_dai->codec; 544 u16 reg; 545 546 /* Turn off PLL */ 547 reg = snd_soc_read(codec, WM8940_POWER1); 548 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df); 549 550 if (freq_in == 0 || freq_out == 0) { 551 /* Clock CODEC directly from MCLK */ 552 reg = snd_soc_read(codec, WM8940_CLOCK); 553 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff); 554 /* Pll power down */ 555 snd_soc_write(codec, WM8940_PLLN, (1 << 7)); 556 return 0; 557 } 558 559 /* Pll is followed by a frequency divide by 4 */ 560 pll_factors(freq_out*4, freq_in); 561 if (pll_div.k) 562 snd_soc_write(codec, WM8940_PLLN, 563 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6)); 564 else /* No factional component */ 565 snd_soc_write(codec, WM8940_PLLN, 566 (pll_div.pre_scale << 4) | pll_div.n); 567 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18); 568 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff); 569 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff); 570 /* Enable the PLL */ 571 reg = snd_soc_read(codec, WM8940_POWER1); 572 snd_soc_write(codec, WM8940_POWER1, reg | 0x020); 573 574 /* Run CODEC from PLL instead of MCLK */ 575 reg = snd_soc_read(codec, WM8940_CLOCK); 576 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100); 577 578 return 0; 579} 580 581static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai, 582 int clk_id, unsigned int freq, int dir) 583{ 584 struct snd_soc_codec *codec = codec_dai->codec; 585 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec); 586 587 switch (freq) { 588 case 11289600: 589 case 12000000: 590 case 12288000: 591 case 16934400: 592 case 18432000: 593 wm8940->sysclk = freq; 594 return 0; 595 } 596 return -EINVAL; 597} 598 599static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 600 int div_id, int div) 601{ 602 struct snd_soc_codec *codec = codec_dai->codec; 603 u16 reg; 604 int ret = 0; 605 606 switch (div_id) { 607 case WM8940_BCLKDIV: 608 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3; 609 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2)); 610 break; 611 case WM8940_MCLKDIV: 612 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F; 613 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5)); 614 break; 615 case WM8940_OPCLKDIV: 616 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF; 617 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4)); 618 break; 619 } 620 return ret; 621} 622 623#define WM8940_RATES SNDRV_PCM_RATE_8000_48000 624 625#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ 626 SNDRV_PCM_FMTBIT_S16_LE | \ 627 SNDRV_PCM_FMTBIT_S20_3LE | \ 628 SNDRV_PCM_FMTBIT_S24_LE | \ 629 SNDRV_PCM_FMTBIT_S32_LE) 630 631static struct snd_soc_dai_ops wm8940_dai_ops = { 632 .hw_params = wm8940_i2s_hw_params, 633 .set_sysclk = wm8940_set_dai_sysclk, 634 .digital_mute = wm8940_mute, 635 .set_fmt = wm8940_set_dai_fmt, 636 .set_clkdiv = wm8940_set_dai_clkdiv, 637 .set_pll = wm8940_set_dai_pll, 638}; 639 640static struct snd_soc_dai_driver wm8940_dai = { 641 .name = "wm8940-hifi", 642 .playback = { 643 .stream_name = "Playback", 644 .channels_min = 1, 645 .channels_max = 2, 646 .rates = WM8940_RATES, 647 .formats = WM8940_FORMATS, 648 }, 649 .capture = { 650 .stream_name = "Capture", 651 .channels_min = 1, 652 .channels_max = 2, 653 .rates = WM8940_RATES, 654 .formats = WM8940_FORMATS, 655 }, 656 .ops = &wm8940_dai_ops, 657 .symmetric_rates = 1, 658}; 659 660static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state) 661{ 662 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); 663} 664 665static int wm8940_resume(struct snd_soc_codec *codec) 666{ 667 int i; 668 int ret; 669 u8 data[3]; 670 u16 *cache = codec->reg_cache; 671 672 /* Sync reg_cache with the hardware 673 * Could use auto incremented writes to speed this up 674 */ 675 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) { 676 data[0] = i; 677 data[1] = (cache[i] & 0xFF00) >> 8; 678 data[2] = cache[i] & 0x00FF; 679 ret = codec->hw_write(codec->control_data, data, 3); 680 if (ret < 0) 681 goto error_ret; 682 else if (ret != 3) { 683 ret = -EIO; 684 goto error_ret; 685 } 686 } 687 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 688 if (ret) 689 goto error_ret; 690 691error_ret: 692 return ret; 693} 694 695static int wm8940_probe(struct snd_soc_codec *codec) 696{ 697 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec); 698 struct wm8940_setup_data *pdata = codec->dev->platform_data; 699 int ret; 700 u16 reg; 701 702 codec->control_data = wm8940->control_data; 703 ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type); 704 if (ret < 0) { 705 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 706 return ret; 707 } 708 709 ret = wm8940_reset(codec); 710 if (ret < 0) { 711 dev_err(codec->dev, "Failed to issue reset\n"); 712 return ret; 713 } 714 715 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 716 717 ret = snd_soc_write(codec, WM8940_POWER1, 0x180); 718 if (ret < 0) 719 return ret; 720 721 if (!pdata) 722 dev_warn(codec->dev, "No platform data supplied\n"); 723 else { 724 reg = snd_soc_read(codec, WM8940_OUTPUTCTL); 725 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi); 726 if (ret < 0) 727 return ret; 728 } 729 730 ret = snd_soc_add_controls(codec, wm8940_snd_controls, 731 ARRAY_SIZE(wm8940_snd_controls)); 732 if (ret) 733 return ret; 734 ret = wm8940_add_widgets(codec); 735 if (ret) 736 return ret; 737 738 return ret; 739} 740 741static int wm8940_remove(struct snd_soc_codec *codec) 742{ 743 wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); 744 return 0; 745} 746 747static struct snd_soc_codec_driver soc_codec_dev_wm8940 = { 748 .probe = wm8940_probe, 749 .remove = wm8940_remove, 750 .suspend = wm8940_suspend, 751 .resume = wm8940_resume, 752 .set_bias_level = wm8940_set_bias_level, 753 .reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults), 754 .reg_word_size = sizeof(u16), 755 .reg_cache_default = wm8940_reg_defaults, 756}; 757 758#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 759static __devinit int wm8940_i2c_probe(struct i2c_client *i2c, 760 const struct i2c_device_id *id) 761{ 762 struct wm8940_priv *wm8940; 763 int ret; 764 765 wm8940 = kzalloc(sizeof(struct wm8940_priv), GFP_KERNEL); 766 if (wm8940 == NULL) 767 return -ENOMEM; 768 769 i2c_set_clientdata(i2c, wm8940); 770 wm8940->control_data = i2c; 771 wm8940->control_type = SND_SOC_I2C; 772 773 ret = snd_soc_register_codec(&i2c->dev, 774 &soc_codec_dev_wm8940, &wm8940_dai, 1); 775 if (ret < 0) 776 kfree(wm8940); 777 return ret; 778} 779 780static __devexit int wm8940_i2c_remove(struct i2c_client *client) 781{ 782 snd_soc_unregister_codec(&client->dev); 783 kfree(i2c_get_clientdata(client)); 784 return 0; 785} 786 787static const struct i2c_device_id wm8940_i2c_id[] = { 788 { "wm8940", 0 }, 789 { } 790}; 791MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id); 792 793static struct i2c_driver wm8940_i2c_driver = { 794 .driver = { 795 .name = "wm8940-codec", 796 .owner = THIS_MODULE, 797 }, 798 .probe = wm8940_i2c_probe, 799 .remove = __devexit_p(wm8940_i2c_remove), 800 .id_table = wm8940_i2c_id, 801}; 802#endif 803 804static int __init wm8940_modinit(void) 805{ 806 int ret = 0; 807#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 808 ret = i2c_add_driver(&wm8940_i2c_driver); 809 if (ret != 0) { 810 printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n", 811 ret); 812 } 813#endif 814 return ret; 815} 816module_init(wm8940_modinit); 817 818static void __exit wm8940_exit(void) 819{ 820#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 821 i2c_del_driver(&wm8940_i2c_driver); 822#endif 823} 824module_exit(wm8940_exit); 825 826MODULE_DESCRIPTION("ASoC WM8940 driver"); 827MODULE_AUTHOR("Jonathan Cameron"); 828MODULE_LICENSE("GPL"); 829