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 44 struct wm8940_priv { 45 unsigned int sysclk; 46 u16 reg_cache[WM8940_CACHEREGNUM]; 47 enum snd_soc_control_type control_type; 48 void *control_data; 49 }; 50 51 static u16 wm8940_reg_defaults[] = { 52 0x8940, /* Soft Reset */ 53 0x0000, /* Power 1 */ 54 0x0000, /* Power 2 */ 55 0x0000, /* Power 3 */ 56 0x0010, /* Interface Control */ 57 0x0000, /* Companding Control */ 58 0x0140, /* Clock Control */ 59 0x0000, /* Additional Controls */ 60 0x0000, /* GPIO Control */ 61 0x0002, /* Auto Increment Control */ 62 0x0000, /* DAC Control */ 63 0x00FF, /* DAC Volume */ 64 0, 65 0, 66 0x0100, /* ADC Control */ 67 0x00FF, /* ADC Volume */ 68 0x0000, /* Notch Filter 1 Control 1 */ 69 0x0000, /* Notch Filter 1 Control 2 */ 70 0x0000, /* Notch Filter 2 Control 1 */ 71 0x0000, /* Notch Filter 2 Control 2 */ 72 0x0000, /* Notch Filter 3 Control 1 */ 73 0x0000, /* Notch Filter 3 Control 2 */ 74 0x0000, /* Notch Filter 4 Control 1 */ 75 0x0000, /* Notch Filter 4 Control 2 */ 76 0x0032, /* DAC Limit Control 1 */ 77 0x0000, /* DAC Limit Control 2 */ 78 0, 79 0, 80 0, 81 0, 82 0, 83 0, 84 0x0038, /* ALC Control 1 */ 85 0x000B, /* ALC Control 2 */ 86 0x0032, /* ALC Control 3 */ 87 0x0000, /* Noise Gate */ 88 0x0041, /* PLLN */ 89 0x000C, /* PLLK1 */ 90 0x0093, /* PLLK2 */ 91 0x00E9, /* PLLK3 */ 92 0, 93 0, 94 0x0030, /* ALC Control 4 */ 95 0, 96 0x0002, /* Input Control */ 97 0x0050, /* PGA Gain */ 98 0, 99 0x0002, /* ADC Boost Control */ 100 0, 101 0x0002, /* Output Control */ 102 0x0000, /* Speaker Mixer Control */ 103 0, 104 0, 105 0, 106 0x0079, /* Speaker Volume */ 107 0, 108 0x0000, /* Mono Mixer Control */ 109 }; 110 111 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" }; 112 static const struct soc_enum wm8940_adc_companding_enum 113 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding); 114 static const struct soc_enum wm8940_dac_companding_enum 115 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding); 116 117 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"}; 118 static const struct soc_enum wm8940_alc_mode_enum 119 = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text); 120 121 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"}; 122 static const struct soc_enum wm8940_mic_bias_level_enum 123 = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text); 124 125 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"}; 126 static const struct soc_enum wm8940_filter_mode_enum 127 = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text); 128 129 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1); 130 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0); 131 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0); 132 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0); 133 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0); 134 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0); 135 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0); 136 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0); 137 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1); 138 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0); 139 140 static const struct snd_kcontrol_new wm8940_snd_controls[] = { 141 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL, 142 6, 1, 0), 143 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum), 144 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum), 145 146 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum), 147 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0), 148 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1, 149 3, 7, 1, wm8940_alc_max_tlv), 150 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1, 151 0, 7, 0, wm8940_alc_min_tlv), 152 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2, 153 0, 14, 0, wm8940_alc_tar_tlv), 154 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0), 155 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0), 156 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0), 157 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0), 158 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE, 159 3, 1, 0), 160 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE, 161 0, 7, 0), 162 163 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0), 164 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0), 165 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0), 166 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2, 167 4, 9, 1, wm8940_lim_thresh_tlv), 168 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2, 169 0, 12, 0, wm8940_lim_boost_tlv), 170 171 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0), 172 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN, 173 0, 63, 0, wm8940_pga_vol_tlv), 174 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL, 175 0, 255, 0, wm8940_adc_tlv), 176 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL, 177 0, 255, 0, wm8940_adc_tlv), 178 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum), 179 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST, 180 8, 1, 0, wm8940_capture_boost_vol_tlv), 181 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL, 182 0, 63, 0, wm8940_spk_vol_tlv), 183 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1), 184 185 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL, 186 8, 1, 1, wm8940_att_tlv), 187 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0), 188 189 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1), 190 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX, 191 7, 1, 1, wm8940_att_tlv), 192 193 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0), 194 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum), 195 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0), 196 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0), 197 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0), 198 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0), 199 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0), 200 }; 201 202 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = { 203 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0), 204 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0), 205 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0), 206 }; 207 208 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = { 209 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0), 210 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0), 211 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0), 212 }; 213 214 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1); 215 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = { 216 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1), 217 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST, 218 0, 7, 0, wm8940_boost_vol_tlv), 219 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST, 220 4, 7, 0, wm8940_boost_vol_tlv), 221 }; 222 223 static const struct snd_kcontrol_new wm8940_micpga_controls[] = { 224 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0), 225 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0), 226 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0), 227 }; 228 229 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = { 230 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0, 231 &wm8940_speaker_mixer_controls[0], 232 ARRAY_SIZE(wm8940_speaker_mixer_controls)), 233 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0, 234 &wm8940_mono_mixer_controls[0], 235 ARRAY_SIZE(wm8940_mono_mixer_controls)), 236 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0), 237 238 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0), 239 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0), 240 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0), 241 SND_SOC_DAPM_OUTPUT("MONOOUT"), 242 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 243 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 244 245 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0), 246 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0), 247 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0, 248 &wm8940_micpga_controls[0], 249 ARRAY_SIZE(wm8940_micpga_controls)), 250 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0, 251 &wm8940_input_boost_controls[0], 252 ARRAY_SIZE(wm8940_input_boost_controls)), 253 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0), 254 255 SND_SOC_DAPM_INPUT("MICN"), 256 SND_SOC_DAPM_INPUT("MICP"), 257 SND_SOC_DAPM_INPUT("AUX"), 258 }; 259 260 static const struct snd_soc_dapm_route audio_map[] = { 261 /* Mono output mixer */ 262 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 263 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 264 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 265 266 /* Speaker output mixer */ 267 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 268 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 269 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 270 271 /* Outputs */ 272 {"Mono Out", NULL, "Mono Mixer"}, 273 {"MONOOUT", NULL, "Mono Out"}, 274 {"SpkN Out", NULL, "Speaker Mixer"}, 275 {"SpkP Out", NULL, "Speaker Mixer"}, 276 {"SPKOUTN", NULL, "SpkN Out"}, 277 {"SPKOUTP", NULL, "SpkP Out"}, 278 279 /* Microphone PGA */ 280 {"Mic PGA", "MICN Switch", "MICN"}, 281 {"Mic PGA", "MICP Switch", "MICP"}, 282 {"Mic PGA", "AUX Switch", "AUX"}, 283 284 /* Boost Mixer */ 285 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"}, 286 {"Boost Mixer", "Mic Volume", "MICP"}, 287 {"Boost Mixer", "Aux Volume", "Aux Input"}, 288 289 {"ADC", NULL, "Boost Mixer"}, 290 }; 291 292 static int wm8940_add_widgets(struct snd_soc_codec *codec) 293 { 294 int ret; 295 296 ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets, 297 ARRAY_SIZE(wm8940_dapm_widgets)); 298 if (ret) 299 goto error_ret; 300 ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 301 if (ret) 302 goto error_ret; 303 304 error_ret: 305 return ret; 306 } 307 308 #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0); 309 310 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai, 311 unsigned int fmt) 312 { 313 struct snd_soc_codec *codec = codec_dai->codec; 314 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67; 315 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe; 316 317 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 318 case SND_SOC_DAIFMT_CBM_CFM: 319 clk |= 1; 320 break; 321 case SND_SOC_DAIFMT_CBS_CFS: 322 break; 323 default: 324 return -EINVAL; 325 } 326 snd_soc_write(codec, WM8940_CLOCK, clk); 327 328 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 329 case SND_SOC_DAIFMT_I2S: 330 iface |= (2 << 3); 331 break; 332 case SND_SOC_DAIFMT_LEFT_J: 333 iface |= (1 << 3); 334 break; 335 case SND_SOC_DAIFMT_RIGHT_J: 336 break; 337 case SND_SOC_DAIFMT_DSP_A: 338 iface |= (3 << 3); 339 break; 340 case SND_SOC_DAIFMT_DSP_B: 341 iface |= (3 << 3) | (1 << 7); 342 break; 343 } 344 345 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 346 case SND_SOC_DAIFMT_NB_NF: 347 break; 348 case SND_SOC_DAIFMT_NB_IF: 349 iface |= (1 << 7); 350 break; 351 case SND_SOC_DAIFMT_IB_NF: 352 iface |= (1 << 8); 353 break; 354 case SND_SOC_DAIFMT_IB_IF: 355 iface |= (1 << 8) | (1 << 7); 356 break; 357 } 358 359 snd_soc_write(codec, WM8940_IFACE, iface); 360 361 return 0; 362 } 363 364 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream, 365 struct snd_pcm_hw_params *params, 366 struct snd_soc_dai *dai) 367 { 368 struct snd_soc_pcm_runtime *rtd = substream->private_data; 369 struct snd_soc_codec *codec = rtd->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); 425 426 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, 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 } 579 580 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 = 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 } 597 598 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 static struct snd_soc_dai_driver wm8940_dai = { 640 .name = "wm8940-hifi", 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 }; 658 659 static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state) 660 { 661 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); 662 } 663 664 static int wm8940_resume(struct snd_soc_codec *codec) 665 { 666 int i; 667 int ret; 668 u8 data[3]; 669 u16 *cache = codec->reg_cache; 670 671 /* Sync reg_cache with the hardware 672 * Could use auto incremented writes to speed this up 673 */ 674 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) { 675 data[0] = i; 676 data[1] = (cache[i] & 0xFF00) >> 8; 677 data[2] = cache[i] & 0x00FF; 678 ret = codec->hw_write(codec->control_data, data, 3); 679 if (ret < 0) 680 goto error_ret; 681 else if (ret != 3) { 682 ret = -EIO; 683 goto error_ret; 684 } 685 } 686 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 687 if (ret) 688 goto error_ret; 689 690 error_ret: 691 return ret; 692 } 693 694 static int wm8940_probe(struct snd_soc_codec *codec) 695 { 696 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec); 697 struct wm8940_setup_data *pdata = codec->dev->platform_data; 698 int ret; 699 u16 reg; 700 701 codec->control_data = wm8940->control_data; 702 ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type); 703 if (ret < 0) { 704 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 705 return ret; 706 } 707 708 ret = wm8940_reset(codec); 709 if (ret < 0) { 710 dev_err(codec->dev, "Failed to issue reset\n"); 711 return ret; 712 } 713 714 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 715 716 ret = snd_soc_write(codec, WM8940_POWER1, 0x180); 717 if (ret < 0) 718 return ret; 719 720 if (!pdata) 721 dev_warn(codec->dev, "No platform data supplied\n"); 722 else { 723 reg = snd_soc_read(codec, WM8940_OUTPUTCTL); 724 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi); 725 if (ret < 0) 726 return ret; 727 } 728 729 ret = snd_soc_add_controls(codec, wm8940_snd_controls, 730 ARRAY_SIZE(wm8940_snd_controls)); 731 if (ret) 732 return ret; 733 ret = wm8940_add_widgets(codec); 734 if (ret) 735 return ret; 736 737 return ret; 738 ; 739 } 740 741 static int wm8940_remove(struct snd_soc_codec *codec) 742 { 743 wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); 744 return 0; 745 } 746 747 static 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) 759 static __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; 771 772 ret = snd_soc_register_codec(&i2c->dev, 773 &soc_codec_dev_wm8940, &wm8940_dai, 1); 774 if (ret < 0) 775 kfree(wm8940); 776 return ret; 777 } 778 779 static __devexit int wm8940_i2c_remove(struct i2c_client *client) 780 { 781 snd_soc_unregister_codec(&client->dev); 782 kfree(i2c_get_clientdata(client)); 783 return 0; 784 } 785 786 static const struct i2c_device_id wm8940_i2c_id[] = { 787 { "wm8940", 0 }, 788 { } 789 }; 790 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id); 791 792 static struct i2c_driver wm8940_i2c_driver = { 793 .driver = { 794 .name = "wm8940-codec", 795 .owner = THIS_MODULE, 796 }, 797 .probe = wm8940_i2c_probe, 798 .remove = __devexit_p(wm8940_i2c_remove), 799 .id_table = wm8940_i2c_id, 800 }; 801 #endif 802 803 static int __init wm8940_modinit(void) 804 { 805 int ret = 0; 806 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 807 ret = i2c_add_driver(&wm8940_i2c_driver); 808 if (ret != 0) { 809 printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n", 810 ret); 811 } 812 #endif 813 return ret; 814 } 815 module_init(wm8940_modinit); 816 817 static void __exit wm8940_exit(void) 818 { 819 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 820 i2c_del_driver(&wm8940_i2c_driver); 821 #endif 822 } 823 module_exit(wm8940_exit); 824 825 MODULE_DESCRIPTION("ASoC WM8940 driver"); 826 MODULE_AUTHOR("Jonathan Cameron"); 827 MODULE_LICENSE("GPL"); 828